CoffeeScript 0.5.5, with string interpolation and internal documentation

Cakefile

@@ -1,5 +1,5 @@
 fs: require 'fs'
-coffee: require 'coffee-script'
+CoffeeScript: require 'coffee-script'
 
 # Run a CoffeeScript through our node/coffee interpreter.
 run: (args) ->
@@ -7,22 +7,36 @@ run: (args) ->
   proc.addListener 'error', (err) -> if err then puts err
 
 
-task 'install', 'install CoffeeScript into /usr/local', ->
+option '-p', '--prefix [DIR]', 'set the installation prefix for `cake install`'
+
+task 'install', 'install CoffeeScript into /usr/local (or --prefix)', (options) ->
+  base: options.prefix or '/usr/local'
+  lib:  base + '/lib/coffee-script'
   exec([
-    'mkdir -p /usr/local/lib/coffee-script'
-    'cp -rf bin lib LICENSE README package.json src vendor /usr/local/lib/coffee-script'
-    'ln -sf /usr/local/lib/coffee-script/lib/bin/coffee /usr/local/bin/coffee'
-    'ln -sf /usr/local/lib/coffee-script/lib/bin/cake /usr/local/bin/cake'
-  ].join(' && '))
+    'mkdir -p ' + lib
+    'cp -rf bin lib LICENSE README package.json src vendor ' + lib
+    'ln -sf ' + lib + '/bin/coffee ' + base + '/bin/coffee'
+    'ln -sf ' + lib + '/bin/cake ' + base + '/bin/cake'
+  ].join(' && '), (err, stdout, stderr) ->
+   if err then print stderr
+  )
 
 
 task 'build', 'build the CoffeeScript language from source', ->
-  fs.readdir 'src', (err, files) ->
-    files: 'src/' + file for file in files when file.match(/\.coffee$/)
-    run ['-o', 'lib'].concat(files)
+  files: fs.readdirSync 'src'
+  files: 'src/' + file for file in files when file.match(/\.coffee$/)
+  run ['-c', '-o', 'lib'].concat(files)
+
+
+task 'build:full', 'checkout /lib, rebuild the source twice, and run the tests', ->
+  exec 'git co lib && bin/cake build && bin/cake build && bin/cake test', (err, stdout, stderr) ->
+    print stdout if stdout
+    print stderr if stderr
+    throw err    if err
 
 
 task 'build:parser', 'rebuild the Jison parser (run build first)', ->
+  require.paths.unshift 'vendor/jison/lib'
   parser: require('grammar').parser
   js: parser.generate()
   parser_path: 'lib/parser.js'
@@ -34,7 +48,21 @@ task 'build:ultraviolet', 'build and install the Ultraviolet syntax highlighter'
     exec 'sudo mv coffeescript.yaml /usr/local/lib/ruby/gems/1.8/gems/ultraviolet-0.10.2/syntax/coffeescript.syntax'
 
 
-task 'build:underscore', 'rebuild the Underscore.coffee documentation page', ->
+task 'build:browser', 'rebuild the merged script for inclusion in the browser', ->
+  exec 'rake browser', (err) ->
+    throw err if err
+
+
+task 'doc:site', 'watch and continually rebuild the documentation for the website', ->
+  exec 'rake doc'
+
+
+task 'doc:source', 'rebuild the internal documentation', ->
+  exec 'docco src/*.coffee && cp -rf docs documentation && rm -r docs', (err) ->
+    throw err if err
+
+
+task 'doc:underscore', 'rebuild the Underscore.coffee documentation page', ->
   exec 'uv -s coffeescript -t idle -h examples/underscore.coffee > documentation/underscore.html'
 
 
@@ -52,6 +80,5 @@ task 'test', 'run the CoffeeScript language test suite', ->
     puts '\033[0;32mpassed ' + test_count + ' tests in ' + time + ' seconds\033[0m'
   fs.readdir 'test', (err, files) ->
     for file in files
-      fs.readFile 'test/' + file, (err, source) ->
-        js: coffee.compile source
-        process.compile js, file
+      fs.readFile 'test/' + file, (err, code) ->
+        CoffeeScript.run code, {source: file}

README

@@ -34,7 +34,8 @@
   To suggest a feature, report a bug, or general discussion:
   http://github.com/jashkenas/coffee-script/issues/
   
-  If you'd like to chat, drop by #coffeescript on Freenode.
+  If you'd like to chat, drop by #coffeescript on Freenode IRC,
+  or on webchat.freenode.net.
 
   The source repository:
   git://github.com/jashkenas/coffee-script.git

Rakefile

@@ -1,11 +1,13 @@
 require 'erb'
 require 'fileutils'
 require 'rake/testtask'
+require 'rubygems'
+require 'yui/compressor'
 
 desc "Build the documentation page"
 task :doc do
   source = 'documentation/index.html.erb'
-  child = fork { exec "bin/coffee documentation/coffee/*.coffee -o documentation/js -w" }
+  child = fork { exec "bin/coffee -c documentation/coffee/*.coffee -o documentation/js -w" }
   at_exit { Process.kill("INT", child) }
   Signal.trap("INT") { exit }
   loop do
@@ -18,3 +20,12 @@ task :doc do
     sleep 1
   end
 end
+
+desc "Build the single concatenated and minified script for the browser"
+task :browser do
+  sources = %w(rewriter.js lexer.js parser.js scope.js nodes.js coffee-script.js)
+  code    = sources.map {|s| File.read('lib/' + s) }.join('')
+  code    = YUI::JavaScriptCompressor.new.compress(code)
+  File.open('extras/coffee-script.js', 'w+') {|f| f.write(code) }
+end
+

bin/cake

@@ -1,7 +1,9 @@
 #!/usr/bin/env node
 
 process.mixin(require('sys'));
+var path = require('path');
+var fs = require('fs');
+var lib = path.join(path.dirname(fs.realpathSync(__filename)), '../lib');
 
-require.paths.unshift(__dirname + '/../lib');
-
+require.paths.unshift(lib);
 require('cake').run();

bin/coffee

@@ -1,7 +1,9 @@
 #!/usr/bin/env node
 
 process.mixin(require('sys'));
+var path = require('path');
+var fs = require('fs');
+var lib = path.join(path.dirname(fs.realpathSync(__filename)), '../lib');
 
-require.paths.unshift(__dirname + '/../lib');
-
-require('command_line').run();
+require.paths.unshift(lib);
+require('command').run();

documentation/coffee/array_comprehensions.coffee

@@ -1,5 +1,5 @@
 # Eat lunch.
-lunch: eat(food) for food in ['toast', 'cheese', 'wine']
+lunch: eat food for food in ['toast', 'cheese', 'wine']
 
 # Naive collision detection.
 for roid in asteroids

documentation/coffee/classes.coffee

@@ -0,0 +1,29 @@
+class Animal
+  move: (meters) ->
+    alert @name + " moved " + meters + "m."
+
+class Snake extends Animal
+  constructor: (name) ->
+    @name: name
+
+  move: ->
+    alert "Slithering..."
+    super 5
+
+class Horse extends Animal
+  constructor: (name) ->
+    @name: name
+
+  move: ->
+    alert "Galloping..."
+    super 45
+
+sam: new Snake "Sammy the Python"
+tom: new Horse "Tommy the Palomino"
+
+sam.move()
+tom.move()
+
+
+
+

documentation/coffee/interpolation.coffee

@@ -0,0 +1,2 @@
+author: "Wittgenstein"
+quote:  "A picture is a fact. -- $author"

documentation/coffee/interpolation_expression.coffee

@@ -0,0 +1,4 @@
+sentence: "${ 22 / 7 } is a decent approximation of π"
+
+
+

documentation/coffee/prototypes.coffee

@@ -0,0 +1,2 @@
+String::dasherize: ->
+  this.replace(/_/g, "-")

documentation/coffee/super.coffee

@@ -1,34 +0,0 @@
-Animal: ->
-
-Animal::move: (meters) ->
-  alert @name + " moved " + meters + "m."
-
-Snake: (name) ->
-  @name: name
-  this
-
-Snake extends Animal
-
-Snake::move: ->
-  alert "Slithering..."
-  super 5
-
-Horse: (name) ->
-  @name: name
-  this
-
-Horse extends Animal
-
-Horse::move: ->
-  alert "Galloping..."
-  super 45
-
-sam: new Snake "Sammy the Python"
-tom: new Horse "Tommy the Palomino"
-
-sam.move()
-tom.move()
-
-
-
-

documentation/css/docs.css

@@ -8,7 +8,7 @@ div.container {
   width: 950px;
   margin: 100px 0 50px 50px;
 }
-p {
+p, li {
   width: 625px;
 }
 a {
@@ -117,10 +117,23 @@ div.code {
   #logo {
     display: block;
     width: 215px; height: 50px;
-    background: url('logo.png');
+    background: url('../images/logo.png');
     position: absolute;
     top: 0px; left: 10px;
   }
+  #error {
+    position: absolute;
+    -webkit-border-radius: 6px; -moz-border-radius: 6px; border-radius: 6px;
+    right: 15px; top: 15px; left: 722px;
+    height: 15px;
+    padding: 2px 5px;
+    background: #fdcdcc;
+    color: #864544;
+    border: 1px solid #864544;
+    font: 10px/15px Arial;
+    overflow: hidden;
+    text-transform: uppercase;
+  }
   .navigation {
     height: 50px;
     font: bold 11px/50px Arial;
@@ -129,11 +142,14 @@ div.code {
     float: left;
     padding: 0 20px;
     border: 1px solid #bbb;
-    border-top: 0; border-bottom: 0;
+    border-top: 0; border-bottom: 0; border-left-width: 0;
     cursor: pointer;
   }
-    .navigation.try {
-      border-left: 0;
+    body.full_screen .navigation {
+      position: static;
+    }
+    .navigation.toc {
+      border-left-width: 1px;
     }
     .navigation:hover,
     .navigation.active {
@@ -161,20 +177,36 @@ div.code {
           width: 700px;
           padding: 0;
         }
+          body.full_screen .navigation .contents.repl_wrapper {
+            position: fixed;
+            width: auto; height: auto;
+            left: 60px; top: 75px; right: 60px; bottom: 30px;
+          }
           .navigation .contents.repl_wrapper .code {
             -webkit-box-shadow: none; -moz-box-shadow: none;
             background: transparent;
             border: 0;
+            position: static;
           }
+            body.full_screen .navigation .contents.repl_wrapper .code {
+              height: 100%;
+              padding: 0; margin: 0;
+            }
           .navigation .code button {
             bottom: 10px;
+            text-transform: none;
           }
-          .navigation .compile {
-            left: 240px; right: auto;
+          .navigation .full_screen, .navigation .minimize {
+            right: auto;
+            left: 10px;
+            display: none;
           }
+            body.minimized .full_screen, body.full_screen .minimize {
+              display: inline;
+            }
       .navigation .contents a {
         display: block;
-        width: 300px;
+        width: 290px;
         text-transform: none;
         text-decoration: none;
         font-weight: normal;
@@ -195,19 +227,40 @@ div.code {
 
 #repl_source, #repl_results {
   background: transparent;
+  outline: none;
+  margin: 5px 0 20px;
 }
-  #repl_source {
-    border: 0;
-    padding: 5px 7px;
+  #repl_source_wrap {
     margin-left: 5px;
-    min-height: 250px;
-    resize: none;
-    width: 295px;
+    height: 250px;
+    width: 307px;
+    position: relative;
+    float: left;
   }
+    #repl_source {
+      width: 96%;
+      height: 100%;
+      border: 0;
+      resize: none;
+    }
   #repl_results {
     font-family: Monaco, Consolas, "Lucida Console", monospace;
     text-transform: none;
     font-weight: normal;
-    min-height: 260px;
-    width: 355px;
-  }
+    height: 260px;
+    margin-bottom: 25px;
+    overflow-y: auto;
+    width: 370px;
+  }
+    body.full_screen #repl_results, body.full_screen #repl_source_wrap {
+      width: auto; height: auto;
+      position: absolute;
+      margin-bottom: 0;
+      top: 10px; left: 10px; right: 10px; bottom: 40px;
+    }
+      body.full_screen #repl_source_wrap {
+        right: 50%;
+      }
+      body.full_screen #repl_results {
+        left: 50%;
+      }

documentation/css/idle.css

@@ -57,6 +57,7 @@ pre.idle .FunctionName {
    color: #21439C;
 }
 pre.idle .Variable {
+  color: #A535AE;
 }
 pre.idle .Comment {
    color: #919191;

documentation/docs/cake.html

@@ -0,0 +1,42 @@
+<!DOCTYPE html>  <html> <head>   <title>cake.coffee</title>   <meta http-equiv="content-type" content="text/html; charset=UTF-8">   <link rel="stylesheet" media="all" href="docco.css" /> </head> <body>   <div id="container">     <div id="background"></div>            <div id="jump_to">         Jump To &hellip;         <div id="jump_wrapper">           <div id="jump_page">                                           <a class="source" href="cake.html">                 cake.coffee               </a>                                           <a class="source" href="coffee-script.html">                 coffee-script.coffee               </a>                                           <a class="source" href="command.html">                 command.coffee               </a>                                           <a class="source" href="grammar.html">                 grammar.coffee               </a>                                           <a class="source" href="lexer.html">                 lexer.coffee               </a>                                           <a class="source" href="nodes.html">                 nodes.coffee               </a>                                           <a class="source" href="optparse.html">                 optparse.coffee               </a>                                           <a class="source" href="repl.html">                 repl.coffee               </a>                                           <a class="source" href="rewriter.html">                 rewriter.coffee               </a>                                           <a class="source" href="scope.html">                 scope.coffee               </a>                        </div>         </div>       </div>          <table cellpadding="0" cellspacing="0">       <thead>         <tr>           <th class="docs">             <h1>               cake.coffee             </h1>           </th>           <th class="code">           </th>         </tr>       </thead>       <tbody>                               <tr id="section-1">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-1">#</a>               </div>               <p><code>cake</code> is a simplified version of <a href="http://www.gnu.org/software/make/">Make</a>
+(<a href="http://rake.rubyforge.org/">Rake</a>, <a href="http://github.com/280north/jake">Jake</a>)
+for CoffeeScript. You define tasks with names and descriptions in a Cakefile,
+and can call them from the command line, or invoke them from other tasks.</p>
+
+<p>Running <code>cake</code> with no arguments will print out a list of all the tasks in the
+current directory's Cakefile.</p>             </td>             <td class="code">               <div class="highlight"><pre></pre></div>             </td>           </tr>                               <tr id="section-2">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-2">#</a>               </div>               <p>External dependencies.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">fs: </span>          <span class="nx">require</span> <span class="s1">&#39;fs&#39;</span>
+<span class="nv">path: </span>        <span class="nx">require</span> <span class="s1">&#39;path&#39;</span>
+<span class="nv">optparse: </span>    <span class="nx">require</span> <span class="s1">&#39;optparse&#39;</span>
+<span class="nv">CoffeeScript: </span><span class="nx">require</span> <span class="s1">&#39;coffee-script&#39;</span></pre></div>             </td>           </tr>                               <tr id="section-3">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-3">#</a>               </div>               <p>Keep track of the list of defined tasks, the accepted options, and so on.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">tasks: </span><span class="p">{}</span>
+<span class="nv">options: </span><span class="p">{}</span>
+<span class="nv">switches: </span><span class="p">[]</span>
+<span class="nv">oparse: </span><span class="kc">null</span></pre></div>             </td>           </tr>                               <tr id="section-4">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-4">#</a>               </div>               <p>Mixin the top-level Cake functions for Cakefiles to use directly.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nx">process</span><span class="p">.</span><span class="nx">mixin</span> <span class="p">{</span></pre></div>             </td>           </tr>                               <tr id="section-5">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-5">#</a>               </div>               <p>Define a Cake task with a short name, a sentence description,
+and the function to run as the action itself.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">task: </span><span class="p">(</span><span class="nx">name</span><span class="p">,</span> <span class="nx">description</span><span class="p">,</span> <span class="nx">action</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="nx">tasks</span><span class="p">[</span><span class="nx">name</span><span class="p">]</span><span class="o">:</span> <span class="p">{</span><span class="nv">name: </span><span class="nx">name</span><span class="p">,</span> <span class="nv">description: </span><span class="nx">description</span><span class="p">,</span> <span class="nv">action: </span><span class="nx">action</span><span class="p">}</span></pre></div>             </td>           </tr>                               <tr id="section-6">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-6">#</a>               </div>               <p>Define an option that the Cakefile accepts. The parsed options hash,
+containing all of the command-line options passed, will be made available
+as the first argument to the action.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">option: </span><span class="p">(</span><span class="nx">letter</span><span class="p">,</span> <span class="nx">flag</span><span class="p">,</span> <span class="nx">description</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="nx">switches</span><span class="p">.</span><span class="nx">push</span> <span class="p">[</span><span class="nx">letter</span><span class="p">,</span> <span class="nx">flag</span><span class="p">,</span> <span class="nx">description</span><span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-7">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-7">#</a>               </div>               <p>Invoke another task in the current Cakefile.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">invoke: </span><span class="p">(</span><span class="nx">name</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="nx">no_such_task</span> <span class="nx">name</span> <span class="nx">unless</span> <span class="nx">tasks</span><span class="p">[</span><span class="nx">name</span><span class="p">]</span>
+    <span class="nx">tasks</span><span class="p">[</span><span class="nx">name</span><span class="p">].</span><span class="nx">action</span> <span class="nx">options</span>
+
+<span class="p">}</span></pre></div>             </td>           </tr>                               <tr id="section-8">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-8">#</a>               </div>               <p>Run <code>cake</code>. Executes all of the tasks you pass, in order. Note that Node's
+asynchrony may cause tasks to execute in a different order than you'd expect.
+If no tasks are passed, print the help screen.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">exports.run: </span><span class="o">-&gt;</span>
+  <span class="nx">path</span><span class="p">.</span><span class="nx">exists</span> <span class="s1">&#39;Cakefile&#39;</span><span class="p">,</span> <span class="p">(</span><span class="nx">exists</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="k">throw</span> <span class="k">new</span> <span class="nb">Error</span><span class="p">(</span><span class="s2">&quot;Cakefile not found in ${process.cwd()}&quot;</span><span class="p">)</span> <span class="nx">unless</span> <span class="nx">exists</span>
+    <span class="nv">args: </span><span class="nx">process</span><span class="p">.</span><span class="nx">argv</span><span class="p">[</span><span class="mi">2</span><span class="p">...</span><span class="nx">process</span><span class="p">.</span><span class="nx">argv</span><span class="p">.</span><span class="nx">length</span><span class="p">]</span>
+    <span class="nx">CoffeeScript</span><span class="p">.</span><span class="nx">run</span> <span class="nx">fs</span><span class="p">.</span><span class="nx">readFileSync</span><span class="p">(</span><span class="s1">&#39;Cakefile&#39;</span><span class="p">),</span> <span class="p">{</span><span class="nv">source: </span><span class="s1">&#39;Cakefile&#39;</span><span class="p">}</span>
+    <span class="nv">oparse: </span><span class="k">new</span> <span class="nx">optparse</span><span class="p">.</span><span class="nx">OptionParser</span> <span class="nx">switches</span>
+    <span class="k">return</span> <span class="nx">print_tasks</span><span class="p">()</span> <span class="nx">unless</span> <span class="nx">args</span><span class="p">.</span><span class="nx">length</span>
+    <span class="nv">options: </span><span class="nx">oparse</span><span class="p">.</span><span class="nx">parse</span><span class="p">(</span><span class="nx">args</span><span class="p">)</span>
+    <span class="nx">invoke</span> <span class="nx">arg</span> <span class="k">for</span> <span class="nx">arg</span> <span class="k">in</span> <span class="nx">options</span><span class="p">.</span><span class="nx">arguments</span></pre></div>             </td>           </tr>                               <tr id="section-9">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-9">#</a>               </div>               <p>Display the list of Cake tasks in a format similar to <code>rake -T</code></p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">print_tasks: </span><span class="o">-&gt;</span>
+  <span class="nx">puts</span> <span class="s1">&#39;&#39;</span>
+  <span class="k">for</span> <span class="nx">name</span><span class="p">,</span> <span class="nx">task</span> <span class="k">of</span> <span class="nx">tasks</span>
+    <span class="nv">spaces: </span><span class="mi">20</span> <span class="o">-</span> <span class="nx">name</span><span class="p">.</span><span class="nx">length</span>
+    <span class="nv">spaces: </span><span class="k">if</span> <span class="nx">spaces</span> <span class="o">&gt;</span> <span class="mi">0</span> <span class="k">then</span> <span class="p">(</span><span class="s1">&#39; &#39;</span> <span class="k">for</span> <span class="nx">i</span> <span class="k">in</span> <span class="p">[</span><span class="mi">0</span><span class="p">..</span><span class="nx">spaces</span><span class="p">]).</span><span class="nx">join</span><span class="p">(</span><span class="s1">&#39;&#39;</span><span class="p">)</span> <span class="k">else</span> <span class="s1">&#39;&#39;</span>
+    <span class="nx">puts</span> <span class="s2">&quot;cake $name$spaces # ${task.description}&quot;</span>
+  <span class="nx">puts</span> <span class="nx">oparse</span><span class="p">.</span><span class="nx">help</span><span class="p">()</span> <span class="k">if</span> <span class="nx">switches</span><span class="p">.</span><span class="nx">length</span></pre></div>             </td>           </tr>                               <tr id="section-10">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-10">#</a>               </div>               <p>Print an error and exit when attempting to all an undefined task.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">no_such_task: </span><span class="p">(</span><span class="nx">task</span><span class="p">)</span> <span class="o">-&gt;</span>
+  <span class="nx">process</span><span class="p">.</span><span class="nx">stdio</span><span class="p">.</span><span class="nx">writeError</span> <span class="s2">&quot;No such task: \&quot;$task\&quot;\n&quot;</span>
+  <span class="nx">process</span><span class="p">.</span><span class="nx">exit</span> <span class="mi">1</span>
+
+</pre></div>             </td>           </tr>                </tbody>     </table>   </div> </body> </html> 

documentation/docs/coffee-script.html

@@ -0,0 +1,55 @@
+<!DOCTYPE html>  <html> <head>   <title>coffee-script.coffee</title>   <meta http-equiv="content-type" content="text/html; charset=UTF-8">   <link rel="stylesheet" media="all" href="docco.css" /> </head> <body>   <div id="container">     <div id="background"></div>            <div id="jump_to">         Jump To &hellip;         <div id="jump_wrapper">           <div id="jump_page">                                           <a class="source" href="cake.html">                 cake.coffee               </a>                                           <a class="source" href="coffee-script.html">                 coffee-script.coffee               </a>                                           <a class="source" href="command.html">                 command.coffee               </a>                                           <a class="source" href="grammar.html">                 grammar.coffee               </a>                                           <a class="source" href="lexer.html">                 lexer.coffee               </a>                                           <a class="source" href="nodes.html">                 nodes.coffee               </a>                                           <a class="source" href="optparse.html">                 optparse.coffee               </a>                                           <a class="source" href="repl.html">                 repl.coffee               </a>                                           <a class="source" href="rewriter.html">                 rewriter.coffee               </a>                                           <a class="source" href="scope.html">                 scope.coffee               </a>                        </div>         </div>       </div>          <table cellpadding="0" cellspacing="0">       <thead>         <tr>           <th class="docs">             <h1>               coffee-script.coffee             </h1>           </th>           <th class="code">           </th>         </tr>       </thead>       <tbody>                               <tr id="section-1">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-1">#</a>               </div>               <p>CoffeeScript can be used both on the server, as a command-line compiler based
+on Node.js/V8, or to run CoffeeScripts directly in the browser. This module
+contains the main entry functions for tokenzing, parsing, and compiling source
+CoffeeScript into JavaScript.</p>
+
+<p>If included on a webpage, it will automatically sniff out, compile, and
+execute all scripts present in <code>text/coffeescript</code> tags.</p>             </td>             <td class="code">               <div class="highlight"><pre></pre></div>             </td>           </tr>                               <tr id="section-2">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-2">#</a>               </div>               <p>Set up dependencies correctly for both the server and the browser.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="k">if</span> <span class="nx">process</span><span class="o">?</span>
+  <span class="nx">process</span><span class="p">.</span><span class="nx">mixin</span> <span class="nx">require</span> <span class="s1">&#39;nodes&#39;</span>
+  <span class="nv">path: </span>        <span class="nx">require</span> <span class="s1">&#39;path&#39;</span>
+  <span class="nv">lexer: </span>  <span class="k">new</span> <span class="p">(</span><span class="nx">require</span><span class="p">(</span><span class="s1">&#39;lexer&#39;</span><span class="p">).</span><span class="nx">Lexer</span><span class="p">)()</span>
+  <span class="nv">parser: </span>      <span class="nx">require</span><span class="p">(</span><span class="s1">&#39;parser&#39;</span><span class="p">).</span><span class="nx">parser</span>
+<span class="k">else</span>
+  <span class="nv">lexer: </span><span class="k">new</span> <span class="nx">Lexer</span><span class="p">()</span>
+  <span class="nv">parser: </span><span class="nx">exports</span><span class="p">.</span><span class="nx">parser</span>
+  <span class="k">this</span><span class="p">.</span><span class="nv">exports: </span><span class="k">this</span><span class="p">.</span><span class="nv">CoffeeScript: </span><span class="p">{}</span></pre></div>             </td>           </tr>                               <tr id="section-3">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-3">#</a>               </div>               <p>The current CoffeeScript version number.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">exports.VERSION: </span><span class="s1">&#39;0.5.5&#39;</span></pre></div>             </td>           </tr>                               <tr id="section-4">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-4">#</a>               </div>               <p>Compile a string of CoffeeScript code to JavaScript, using the Coffee/Jison
+compiler.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">exports.compile: </span><span class="p">(</span><span class="nx">code</span><span class="p">,</span> <span class="nx">options</span><span class="p">)</span> <span class="o">-&gt;</span>
+  <span class="k">try</span>
+    <span class="p">(</span><span class="nx">parser</span><span class="p">.</span><span class="nx">parse</span> <span class="nx">lexer</span><span class="p">.</span><span class="nx">tokenize</span> <span class="nx">code</span><span class="p">).</span><span class="nx">compile</span> <span class="nx">options</span>
+  <span class="k">catch</span> <span class="nx">err</span>
+    <span class="nv">err.message: </span><span class="s2">&quot;In ${options.source}, ${err.message}&quot;</span> <span class="k">if</span> <span class="nx">options</span><span class="p">.</span><span class="nx">source</span>
+    <span class="k">throw</span> <span class="nx">err</span></pre></div>             </td>           </tr>                               <tr id="section-5">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-5">#</a>               </div>               <p>Tokenize a string of CoffeeScript code, and return the array of tokens.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">exports.tokens: </span><span class="p">(</span><span class="nx">code</span><span class="p">)</span> <span class="o">-&gt;</span>
+  <span class="nx">lexer</span><span class="p">.</span><span class="nx">tokenize</span> <span class="nx">code</span></pre></div>             </td>           </tr>                               <tr id="section-6">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-6">#</a>               </div>               <p>Tokenize and parse a string of CoffeeScript code, and return the AST. You can
+then compile it by calling <code>.compile()</code> on the root, or traverse it by using
+<code>.traverse()</code> with a callback.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">exports.nodes: </span><span class="p">(</span><span class="nx">code</span><span class="p">)</span> <span class="o">-&gt;</span>
+  <span class="nx">parser</span><span class="p">.</span><span class="nx">parse</span> <span class="nx">lexer</span><span class="p">.</span><span class="nx">tokenize</span> <span class="nx">code</span></pre></div>             </td>           </tr>                               <tr id="section-7">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-7">#</a>               </div>               <p>Compile and execute a string of CoffeeScript (on the server), correctly
+setting <code>__filename</code>, <code>__dirname</code>, and relative <code>require()</code>.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">exports.run: </span><span class="p">(</span><span class="nx">code</span><span class="p">,</span> <span class="nx">options</span><span class="p">)</span> <span class="o">-&gt;</span>
+  <span class="nv">module.filename: __filename: </span><span class="nx">options</span><span class="p">.</span><span class="nx">source</span>
+  <span class="nv">__dirname: </span><span class="nx">path</span><span class="p">.</span><span class="nx">dirname</span> <span class="nx">__filename</span>
+  <span class="nb">eval</span> <span class="nx">exports</span><span class="p">.</span><span class="nx">compile</span> <span class="nx">code</span><span class="p">,</span> <span class="nx">options</span></pre></div>             </td>           </tr>                               <tr id="section-8">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-8">#</a>               </div>               <p>The real Lexer produces a generic stream of tokens. This object provides a
+thin wrapper around it, compatible with the Jison API. We can then pass it
+directly as a "Jison lexer".</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">parser.lexer: </span><span class="p">{</span>
+  <span class="nv">lex: </span><span class="o">-&gt;</span>
+    <span class="nv">token: </span><span class="err">@</span><span class="nx">tokens</span><span class="p">[</span><span class="err">@</span><span class="nx">pos</span><span class="p">]</span> <span class="o">or</span> <span class="p">[</span><span class="s2">&quot;&quot;</span><span class="p">]</span>
+    <span class="err">@</span><span class="nx">pos</span> <span class="o">+=</span> <span class="mi">1</span>
+    <span class="k">this</span><span class="p">.</span><span class="nv">yylineno: </span><span class="nx">token</span><span class="p">[</span><span class="mi">2</span><span class="p">]</span>
+    <span class="k">this</span><span class="p">.</span><span class="nv">yytext: </span>  <span class="nx">token</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span>
+    <span class="nx">token</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
+  <span class="nv">setInput: </span><span class="p">(</span><span class="nx">tokens</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nv">tokens: </span><span class="nx">tokens</span>
+    <span class="err">@</span><span class="nv">pos: </span><span class="mi">0</span>
+  <span class="nv">upcomingInput: </span><span class="o">-&gt;</span> <span class="s2">&quot;&quot;</span>
+  <span class="nv">showPosition: </span><span class="o">-&gt;</span> <span class="err">@</span><span class="nx">pos</span>
+<span class="p">}</span></pre></div>             </td>           </tr>                               <tr id="section-9">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-9">#</a>               </div>               <p>Activate CoffeeScript in the browser by having it compile and evaluate
+all script tags with a content-type of <code>text/coffeescript</code>. This happens
+on page load. Unfortunately, the text contents of remote scripts cannot be
+accessed from the browser, so only inline script tags will work.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="k">if</span> <span class="nb">document</span><span class="o">?</span> <span class="o">and</span> <span class="nb">document</span><span class="p">.</span><span class="nx">getElementsByTagName</span>
+  <span class="nv">process_scripts: </span><span class="o">-&gt;</span>
+    <span class="k">for</span> <span class="nx">tag</span> <span class="k">in</span> <span class="nb">document</span><span class="p">.</span><span class="nx">getElementsByTagName</span><span class="p">(</span><span class="s1">&#39;script&#39;</span><span class="p">)</span> <span class="k">when</span> <span class="nx">tag</span><span class="p">.</span><span class="nx">type</span> <span class="o">is</span> <span class="s1">&#39;text/coffeescript&#39;</span>
+      <span class="nb">eval</span> <span class="nx">exports</span><span class="p">.</span><span class="nx">compile</span> <span class="nx">tag</span><span class="p">.</span><span class="nx">innerHTML</span>
+  <span class="k">if</span> <span class="nb">window</span><span class="p">.</span><span class="nx">addEventListener</span>
+    <span class="nb">window</span><span class="p">.</span><span class="nx">addEventListener</span> <span class="s1">&#39;load&#39;</span><span class="p">,</span> <span class="nx">process_scripts</span><span class="p">,</span> <span class="kc">false</span>
+  <span class="k">else</span> <span class="k">if</span> <span class="nb">window</span><span class="p">.</span><span class="nx">attachEvent</span>
+    <span class="nb">window</span><span class="p">.</span><span class="nx">attachEvent</span> <span class="s1">&#39;onload&#39;</span><span class="p">,</span> <span class="nx">process_scripts</span>
+
+</pre></div>             </td>           </tr>                </tbody>     </table>   </div> </body> </html> 

documentation/docs/command.html

@@ -0,0 +1,115 @@
+<!DOCTYPE html>  <html> <head>   <title>command.coffee</title>   <meta http-equiv="content-type" content="text/html; charset=UTF-8">   <link rel="stylesheet" media="all" href="docco.css" /> </head> <body>   <div id="container">     <div id="background"></div>            <div id="jump_to">         Jump To &hellip;         <div id="jump_wrapper">           <div id="jump_page">                                           <a class="source" href="cake.html">                 cake.coffee               </a>                                           <a class="source" href="coffee-script.html">                 coffee-script.coffee               </a>                                           <a class="source" href="command.html">                 command.coffee               </a>                                           <a class="source" href="grammar.html">                 grammar.coffee               </a>                                           <a class="source" href="lexer.html">                 lexer.coffee               </a>                                           <a class="source" href="nodes.html">                 nodes.coffee               </a>                                           <a class="source" href="optparse.html">                 optparse.coffee               </a>                                           <a class="source" href="repl.html">                 repl.coffee               </a>                                           <a class="source" href="rewriter.html">                 rewriter.coffee               </a>                                           <a class="source" href="scope.html">                 scope.coffee               </a>                        </div>         </div>       </div>          <table cellpadding="0" cellspacing="0">       <thead>         <tr>           <th class="docs">             <h1>               command.coffee             </h1>           </th>           <th class="code">           </th>         </tr>       </thead>       <tbody>                               <tr id="section-1">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-1">#</a>               </div>               <p>The <code>coffee</code> utility. Handles command-line compilation of CoffeeScript
+into various forms: saved into <code>.js</code> files or printed to stdout, piped to
+<a href="http://javascriptlint.com/">JSLint</a> or recompiled every time the source is
+saved, printed as a token stream or as the syntax tree, or launch an
+interactive REPL.</p>             </td>             <td class="code">               <div class="highlight"><pre></pre></div>             </td>           </tr>                               <tr id="section-2">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-2">#</a>               </div>               <p>External dependencies.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">fs: </span>          <span class="nx">require</span> <span class="s1">&#39;fs&#39;</span>
+<span class="nv">path: </span>        <span class="nx">require</span> <span class="s1">&#39;path&#39;</span>
+<span class="nv">optparse: </span>    <span class="nx">require</span> <span class="s1">&#39;optparse&#39;</span>
+<span class="nv">CoffeeScript: </span><span class="nx">require</span> <span class="s1">&#39;coffee-script&#39;</span></pre></div>             </td>           </tr>                               <tr id="section-3">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-3">#</a>               </div>               <p>The help banner that is printed when <code>coffee</code> is called without arguments.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">BANNER: </span><span class="s1">&#39;&#39;&#39;</span>
+<span class="s1">  coffee compiles CoffeeScript source files into JavaScript.</span>
+
+<span class="s1">  Usage:</span>
+<span class="s1">    coffee path/to/script.coffee</span>
+<span class="s1">        &#39;&#39;&#39;</span></pre></div>             </td>           </tr>                               <tr id="section-4">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-4">#</a>               </div>               <p>The list of all the valid option flags that <code>coffee</code> knows how to handle.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">SWITCHES: </span><span class="p">[</span>
+  <span class="p">[</span><span class="s1">&#39;-c&#39;</span><span class="p">,</span> <span class="s1">&#39;--compile&#39;</span><span class="p">,</span>       <span class="s1">&#39;compile to JavaScript and save as .js files&#39;</span><span class="p">]</span>
+  <span class="p">[</span><span class="s1">&#39;-i&#39;</span><span class="p">,</span> <span class="s1">&#39;--interactive&#39;</span><span class="p">,</span>   <span class="s1">&#39;run an interactive CoffeeScript REPL&#39;</span><span class="p">]</span>
+  <span class="p">[</span><span class="s1">&#39;-o&#39;</span><span class="p">,</span> <span class="s1">&#39;--output [DIR]&#39;</span><span class="p">,</span>  <span class="s1">&#39;set the directory for compiled JavaScript&#39;</span><span class="p">]</span>
+  <span class="p">[</span><span class="s1">&#39;-w&#39;</span><span class="p">,</span> <span class="s1">&#39;--watch&#39;</span><span class="p">,</span>         <span class="s1">&#39;watch scripts for changes, and recompile&#39;</span><span class="p">]</span>
+  <span class="p">[</span><span class="s1">&#39;-p&#39;</span><span class="p">,</span> <span class="s1">&#39;--print&#39;</span><span class="p">,</span>         <span class="s1">&#39;print the compiled JavaScript to stdout&#39;</span><span class="p">]</span>
+  <span class="p">[</span><span class="s1">&#39;-l&#39;</span><span class="p">,</span> <span class="s1">&#39;--lint&#39;</span><span class="p">,</span>          <span class="s1">&#39;pipe the compiled JavaScript through JSLint&#39;</span><span class="p">]</span>
+  <span class="p">[</span><span class="s1">&#39;-s&#39;</span><span class="p">,</span> <span class="s1">&#39;--stdio&#39;</span><span class="p">,</span>         <span class="s1">&#39;listen for and compile scripts over stdio&#39;</span><span class="p">]</span>
+  <span class="p">[</span><span class="s1">&#39;-e&#39;</span><span class="p">,</span> <span class="s1">&#39;--eval&#39;</span><span class="p">,</span>          <span class="s1">&#39;compile a string from the command line&#39;</span><span class="p">]</span>
+  <span class="p">[</span>      <span class="s1">&#39;--no-wrap&#39;</span><span class="p">,</span>       <span class="s1">&#39;compile without the top-level function wrapper&#39;</span><span class="p">]</span>
+  <span class="p">[</span><span class="s1">&#39;-t&#39;</span><span class="p">,</span> <span class="s1">&#39;--tokens&#39;</span><span class="p">,</span>        <span class="s1">&#39;print the tokens that the lexer produces&#39;</span><span class="p">]</span>
+  <span class="p">[</span><span class="s1">&#39;-n&#39;</span><span class="p">,</span> <span class="s1">&#39;--nodes&#39;</span><span class="p">,</span>         <span class="s1">&#39;print the parse tree that Jison produces&#39;</span><span class="p">]</span>
+  <span class="p">[</span><span class="s1">&#39;-v&#39;</span><span class="p">,</span> <span class="s1">&#39;--version&#39;</span><span class="p">,</span>       <span class="s1">&#39;display CoffeeScript version&#39;</span><span class="p">]</span>
+  <span class="p">[</span><span class="s1">&#39;-h&#39;</span><span class="p">,</span> <span class="s1">&#39;--help&#39;</span><span class="p">,</span>          <span class="s1">&#39;display this help message&#39;</span><span class="p">]</span>
+<span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-5">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-5">#</a>               </div>               <p>Top-level objects shared by all the functions.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">options: </span><span class="p">{}</span>
+<span class="nv">sources: </span><span class="p">[]</span>
+<span class="nv">option_parser: </span><span class="kc">null</span></pre></div>             </td>           </tr>                               <tr id="section-6">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-6">#</a>               </div>               <p>Run <code>coffee</code> by parsing passed options and determining what action to take.
+Many flags cause us to divert before compiling anything. Flags passed after
+<code>--</code> will be passed verbatim to your script as arguments in <code>process.argv</code></p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">exports.run: </span><span class="o">-&gt;</span>
+  <span class="nx">parse_options</span><span class="p">()</span>
+  <span class="k">return</span> <span class="nx">usage</span><span class="p">()</span>                              <span class="k">if</span> <span class="nx">options</span><span class="p">.</span><span class="nx">help</span>
+  <span class="k">return</span> <span class="nx">version</span><span class="p">()</span>                            <span class="k">if</span> <span class="nx">options</span><span class="p">.</span><span class="nx">version</span>
+  <span class="k">return</span> <span class="nx">require</span> <span class="s1">&#39;repl&#39;</span>                       <span class="k">if</span> <span class="nx">options</span><span class="p">.</span><span class="nx">interactive</span>
+  <span class="k">return</span> <span class="nx">compile_stdio</span><span class="p">()</span>                      <span class="k">if</span> <span class="nx">options</span><span class="p">.</span><span class="nx">stdio</span>
+  <span class="k">return</span> <span class="nx">compile_script</span> <span class="s1">&#39;console&#39;</span><span class="p">,</span> <span class="nx">sources</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="k">if</span> <span class="nx">options</span><span class="p">.</span><span class="nb">eval</span>
+  <span class="k">return</span> <span class="nx">usage</span><span class="p">()</span>                              <span class="nx">unless</span> <span class="nx">sources</span><span class="p">.</span><span class="nx">length</span>
+  <span class="nv">separator: </span><span class="nx">sources</span><span class="p">.</span><span class="nx">indexOf</span> <span class="s1">&#39;--&#39;</span>
+  <span class="nv">flags: </span><span class="p">[]</span>
+  <span class="k">if</span> <span class="nx">separator</span> <span class="o">&gt;=</span> <span class="mi">0</span>
+    <span class="nv">flags: </span><span class="nx">sources</span><span class="p">[(</span><span class="nx">separator</span> <span class="o">+</span> <span class="mi">1</span><span class="p">)...</span><span class="nx">sources</span><span class="p">.</span><span class="nx">length</span><span class="p">]</span>
+    <span class="nv">sources: </span><span class="nx">sources</span><span class="p">[</span><span class="mi">0</span><span class="p">...</span><span class="nx">separator</span><span class="p">]</span>
+  <span class="nv">process.ARGV: process.argv: </span><span class="nx">flags</span>
+  <span class="nx">watch_scripts</span><span class="p">()</span> <span class="k">if</span> <span class="nx">options</span><span class="p">.</span><span class="nx">watch</span>
+  <span class="nx">compile_scripts</span><span class="p">()</span></pre></div>             </td>           </tr>                               <tr id="section-7">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-7">#</a>               </div>               <p>Asynchronously read in each CoffeeScript in a list of source files and
+compile them.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">compile_scripts: </span><span class="o">-&gt;</span>
+  <span class="nv">compile: </span><span class="p">(</span><span class="nx">source</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="nx">path</span><span class="p">.</span><span class="nx">exists</span> <span class="nx">source</span><span class="p">,</span> <span class="p">(</span><span class="nx">exists</span><span class="p">)</span> <span class="o">-&gt;</span>
+      <span class="k">throw</span> <span class="k">new</span> <span class="nb">Error</span> <span class="s2">&quot;File not found: $source&quot;</span> <span class="nx">unless</span> <span class="nx">exists</span>
+      <span class="nx">fs</span><span class="p">.</span><span class="nx">readFile</span> <span class="nx">source</span><span class="p">,</span> <span class="p">(</span><span class="nx">err</span><span class="p">,</span> <span class="nx">code</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="nx">compile_script</span><span class="p">(</span><span class="nx">source</span><span class="p">,</span> <span class="nx">code</span><span class="p">)</span>
+  <span class="nx">compile</span><span class="p">(</span><span class="nx">source</span><span class="p">)</span> <span class="k">for</span> <span class="nx">source</span> <span class="k">in</span> <span class="nx">sources</span></pre></div>             </td>           </tr>                               <tr id="section-8">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-8">#</a>               </div>               <p>Compile a single source script, containing the given code, according to the
+requested options. Both compile_scripts and watch_scripts share this method
+in common. If evaluating the script directly sets <code>__filename</code>, <code>__dirname</code>
+and <code>module.filename</code> to be correct relative to the script's path.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">compile_script: </span><span class="p">(</span><span class="nx">source</span><span class="p">,</span> <span class="nx">code</span><span class="p">)</span> <span class="o">-&gt;</span>
+  <span class="nv">o: </span><span class="nx">options</span>
+  <span class="nv">code_opts: </span><span class="nx">compile_options</span> <span class="nx">source</span>
+  <span class="k">try</span>
+    <span class="k">if</span>      <span class="nx">o</span><span class="p">.</span><span class="nx">tokens</span>      <span class="k">then</span> <span class="nx">print_tokens</span> <span class="nx">CoffeeScript</span><span class="p">.</span><span class="nx">tokens</span> <span class="nx">code</span>
+    <span class="k">else</span> <span class="k">if</span> <span class="nx">o</span><span class="p">.</span><span class="nx">nodes</span>       <span class="k">then</span> <span class="nx">puts</span> <span class="nx">CoffeeScript</span><span class="p">.</span><span class="nx">nodes</span><span class="p">(</span><span class="nx">code</span><span class="p">).</span><span class="nx">toString</span><span class="p">()</span>
+    <span class="k">else</span> <span class="k">if</span> <span class="nx">o</span><span class="p">.</span><span class="nx">run</span>         <span class="k">then</span> <span class="nx">CoffeeScript</span><span class="p">.</span><span class="nx">run</span> <span class="nx">code</span><span class="p">,</span> <span class="nx">code_opts</span>
+    <span class="k">else</span>
+      <span class="nv">js: </span><span class="nx">CoffeeScript</span><span class="p">.</span><span class="nx">compile</span> <span class="nx">code</span><span class="p">,</span> <span class="nx">code_opts</span>
+      <span class="k">if</span> <span class="nx">o</span><span class="p">.</span><span class="nx">print</span>          <span class="k">then</span> <span class="nx">process</span><span class="p">.</span><span class="nx">stdio</span><span class="p">.</span><span class="nx">write</span> <span class="nx">js</span>
+      <span class="k">else</span> <span class="k">if</span> <span class="nx">o</span><span class="p">.</span><span class="nx">compile</span>   <span class="k">then</span> <span class="nx">write_js</span> <span class="nx">source</span><span class="p">,</span> <span class="nx">js</span>
+      <span class="k">else</span> <span class="k">if</span> <span class="nx">o</span><span class="p">.</span><span class="nx">lint</span>      <span class="k">then</span> <span class="nx">lint</span> <span class="nx">js</span>
+  <span class="k">catch</span> <span class="nx">err</span>
+    <span class="k">if</span> <span class="nx">o</span><span class="p">.</span><span class="nx">watch</span>            <span class="k">then</span> <span class="nx">puts</span> <span class="nx">err</span><span class="p">.</span><span class="nx">message</span> <span class="k">else</span> <span class="k">throw</span> <span class="nx">err</span></pre></div>             </td>           </tr>                               <tr id="section-9">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-9">#</a>               </div>               <p>Attach the appropriate listeners to compile scripts incoming over <strong>stdin</strong>,
+and write them back to <strong>stdout</strong>.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">compile_stdio: </span><span class="o">-&gt;</span>
+  <span class="nv">code: </span><span class="s1">&#39;&#39;</span>
+  <span class="nx">process</span><span class="p">.</span><span class="nx">stdio</span><span class="p">.</span><span class="nx">open</span><span class="p">()</span>
+  <span class="nx">process</span><span class="p">.</span><span class="nx">stdio</span><span class="p">.</span><span class="nx">addListener</span> <span class="s1">&#39;data&#39;</span><span class="p">,</span> <span class="p">(</span><span class="nx">string</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="nx">code</span> <span class="o">+=</span> <span class="nx">string</span> <span class="k">if</span> <span class="nx">string</span>
+  <span class="nx">process</span><span class="p">.</span><span class="nx">stdio</span><span class="p">.</span><span class="nx">addListener</span> <span class="s1">&#39;close&#39;</span><span class="p">,</span> <span class="o">-&gt;</span>
+    <span class="nx">compile_script</span> <span class="s1">&#39;stdio&#39;</span><span class="p">,</span> <span class="nx">code</span></pre></div>             </td>           </tr>                               <tr id="section-10">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-10">#</a>               </div>               <p>Watch a list of source CoffeeScript files using <code>fs.watchFile</code>, recompiling
+them every time the files are updated. May be used in combination with other
+options, such as <code>--lint</code> or <code>--print</code>.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">watch_scripts: </span><span class="o">-&gt;</span>
+  <span class="nv">watch: </span><span class="p">(</span><span class="nx">source</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="nx">fs</span><span class="p">.</span><span class="nx">watchFile</span> <span class="nx">source</span><span class="p">,</span> <span class="p">{</span><span class="nv">persistent: </span><span class="kc">true</span><span class="p">,</span> <span class="nv">interval: </span><span class="mi">500</span><span class="p">},</span> <span class="p">(</span><span class="nx">curr</span><span class="p">,</span> <span class="nx">prev</span><span class="p">)</span> <span class="o">-&gt;</span>
+      <span class="k">return</span> <span class="k">if</span> <span class="nx">curr</span><span class="p">.</span><span class="nx">mtime</span><span class="p">.</span><span class="nx">getTime</span><span class="p">()</span> <span class="o">is</span> <span class="nx">prev</span><span class="p">.</span><span class="nx">mtime</span><span class="p">.</span><span class="nx">getTime</span><span class="p">()</span>
+      <span class="nx">fs</span><span class="p">.</span><span class="nx">readFile</span> <span class="nx">source</span><span class="p">,</span> <span class="p">(</span><span class="nx">err</span><span class="p">,</span> <span class="nx">code</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="nx">compile_script</span><span class="p">(</span><span class="nx">source</span><span class="p">,</span> <span class="nx">code</span><span class="p">)</span>
+  <span class="nx">watch</span><span class="p">(</span><span class="nx">source</span><span class="p">)</span> <span class="k">for</span> <span class="nx">source</span> <span class="k">in</span> <span class="nx">sources</span></pre></div>             </td>           </tr>                               <tr id="section-11">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-11">#</a>               </div>               <p>Write out a JavaScript source file with the compiled code. By default, files
+are written out in <code>cwd</code> as <code>.js</code> files with the same name, but the output
+directory can be customized with <code>--output</code>.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">write_js: </span><span class="p">(</span><span class="nx">source</span><span class="p">,</span> <span class="nx">js</span><span class="p">)</span> <span class="o">-&gt;</span>
+  <span class="nv">filename: </span><span class="nx">path</span><span class="p">.</span><span class="nx">basename</span><span class="p">(</span><span class="nx">source</span><span class="p">,</span> <span class="nx">path</span><span class="p">.</span><span class="nx">extname</span><span class="p">(</span><span class="nx">source</span><span class="p">))</span> <span class="o">+</span> <span class="s1">&#39;.js&#39;</span>
+  <span class="nv">dir: </span>     <span class="nx">options</span><span class="p">.</span><span class="nx">output</span> <span class="o">or</span> <span class="nx">path</span><span class="p">.</span><span class="nx">dirname</span><span class="p">(</span><span class="nx">source</span><span class="p">)</span>
+  <span class="nv">js_path: </span> <span class="nx">path</span><span class="p">.</span><span class="nx">join</span> <span class="nx">dir</span><span class="p">,</span> <span class="nx">filename</span>
+  <span class="nx">fs</span><span class="p">.</span><span class="nx">writeFile</span> <span class="nx">js_path</span><span class="p">,</span> <span class="nx">js</span></pre></div>             </td>           </tr>                               <tr id="section-12">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-12">#</a>               </div>               <p>Pipe compiled JS through JSLint (requires a working <code>jsl</code> command), printing
+any errors or warnings that arise.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">lint: </span><span class="p">(</span><span class="nx">js</span><span class="p">)</span> <span class="o">-&gt;</span>
+  <span class="nv">jsl: </span><span class="nx">process</span><span class="p">.</span><span class="nx">createChildProcess</span><span class="p">(</span><span class="s1">&#39;jsl&#39;</span><span class="p">,</span> <span class="p">[</span><span class="s1">&#39;-nologo&#39;</span><span class="p">,</span> <span class="s1">&#39;-stdin&#39;</span><span class="p">])</span>
+  <span class="nx">jsl</span><span class="p">.</span><span class="nx">addListener</span> <span class="s1">&#39;output&#39;</span><span class="p">,</span> <span class="p">(</span><span class="nx">result</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="nx">puts</span> <span class="nx">result</span><span class="p">.</span><span class="nx">replace</span><span class="p">(</span><span class="sr">/\n/g</span><span class="p">,</span> <span class="s1">&#39;&#39;</span><span class="p">)</span> <span class="k">if</span> <span class="nx">result</span>
+  <span class="nx">jsl</span><span class="p">.</span><span class="nx">addListener</span> <span class="s1">&#39;error&#39;</span><span class="p">,</span> <span class="p">(</span><span class="nx">result</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="nx">puts</span> <span class="nx">result</span> <span class="k">if</span> <span class="nx">result</span>
+  <span class="nx">jsl</span><span class="p">.</span><span class="nx">write</span> <span class="nx">js</span>
+  <span class="nx">jsl</span><span class="p">.</span><span class="nx">close</span><span class="p">()</span></pre></div>             </td>           </tr>                               <tr id="section-13">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-13">#</a>               </div>               <p>Pretty-print a stream of tokens.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">print_tokens: </span><span class="p">(</span><span class="nx">tokens</span><span class="p">)</span> <span class="o">-&gt;</span>
+  <span class="nv">strings: </span><span class="k">for</span> <span class="nx">token</span> <span class="k">in</span> <span class="nx">tokens</span>
+    <span class="p">[</span><span class="nx">tag</span><span class="p">,</span> <span class="nx">value</span><span class="p">]</span><span class="o">:</span> <span class="p">[</span><span class="nx">token</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="nx">token</span><span class="p">[</span><span class="mi">1</span><span class="p">].</span><span class="nx">toString</span><span class="p">().</span><span class="nx">replace</span><span class="p">(</span><span class="sr">/\n/</span><span class="p">,</span> <span class="s1">&#39;\\n&#39;</span><span class="p">)]</span>
+    <span class="s2">&quot;[$tag $value]&quot;</span>
+  <span class="nx">puts</span> <span class="nx">strings</span><span class="p">.</span><span class="nx">join</span><span class="p">(</span><span class="s1">&#39; &#39;</span><span class="p">)</span></pre></div>             </td>           </tr>                               <tr id="section-14">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-14">#</a>               </div>               <p>Use the <a href="optparse.html">OptionParser module</a> to extract all options from
+<code>process.argv</code> that are specified in <code>SWITCHES</code>.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">parse_options: </span><span class="o">-&gt;</span>
+  <span class="nv">option_parser: </span><span class="k">new</span> <span class="nx">optparse</span><span class="p">.</span><span class="nx">OptionParser</span> <span class="nx">SWITCHES</span><span class="p">,</span> <span class="nx">BANNER</span>
+  <span class="nv">o: options: </span>   <span class="nx">option_parser</span><span class="p">.</span><span class="nx">parse</span><span class="p">(</span><span class="nx">process</span><span class="p">.</span><span class="nx">argv</span><span class="p">)</span>
+  <span class="nv">options.run: </span>  <span class="o">not</span> <span class="p">(</span><span class="nx">o</span><span class="p">.</span><span class="nx">compile</span> <span class="o">or</span> <span class="nx">o</span><span class="p">.</span><span class="nx">print</span> <span class="o">or</span> <span class="nx">o</span><span class="p">.</span><span class="nx">lint</span><span class="p">)</span>
+  <span class="nv">options.print: </span><span class="o">!!</span>  <span class="p">(</span><span class="nx">o</span><span class="p">.</span><span class="nx">print</span> <span class="o">or</span> <span class="p">(</span><span class="nx">o</span><span class="p">.</span><span class="nb">eval</span> <span class="o">or</span> <span class="nx">o</span><span class="p">.</span><span class="nx">stdio</span> <span class="o">and</span> <span class="nx">o</span><span class="p">.</span><span class="nx">compile</span><span class="p">))</span>
+  <span class="nv">sources: </span>      <span class="nx">options</span><span class="p">.</span><span class="nx">arguments</span><span class="p">[</span><span class="mi">2</span><span class="p">...</span><span class="nx">options</span><span class="p">.</span><span class="nx">arguments</span><span class="p">.</span><span class="nx">length</span><span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-15">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-15">#</a>               </div>               <p>The compile-time options to pass to the CoffeeScript compiler.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">compile_options: </span><span class="p">(</span><span class="nx">source</span><span class="p">)</span> <span class="o">-&gt;</span>
+  <span class="nv">o: </span><span class="p">{</span><span class="nv">source: </span><span class="nx">source</span><span class="p">}</span>
+  <span class="nx">o</span><span class="p">[</span><span class="s1">&#39;no_wrap&#39;</span><span class="p">]</span><span class="o">:</span> <span class="nx">options</span><span class="p">[</span><span class="s1">&#39;no-wrap&#39;</span><span class="p">]</span>
+  <span class="nx">o</span></pre></div>             </td>           </tr>                               <tr id="section-16">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-16">#</a>               </div>               <p>Print the <code>--help</code> usage message and exit.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">usage: </span><span class="o">-&gt;</span>
+  <span class="nx">puts</span> <span class="nx">option_parser</span><span class="p">.</span><span class="nx">help</span><span class="p">()</span>
+  <span class="nx">process</span><span class="p">.</span><span class="nx">exit</span> <span class="mi">0</span></pre></div>             </td>           </tr>                               <tr id="section-17">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-17">#</a>               </div>               <p>Print the <code>--version</code> message and exit.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">version: </span><span class="o">-&gt;</span>
+  <span class="nx">puts</span> <span class="s2">&quot;CoffeeScript version ${CoffeeScript.VERSION}&quot;</span>
+  <span class="nx">process</span><span class="p">.</span><span class="nx">exit</span> <span class="mi">0</span>
+
+</pre></div>             </td>           </tr>                </tbody>     </table>   </div> </body> </html> 

documentation/docs/docco.css

@@ -0,0 +1,185 @@
+/*--------------------- Layout and Typography ----------------------------*/
+body {
+  font-family: 'Palatino Linotype', 'Book Antiqua', Palatino, FreeSerif, serif;
+  font-size: 16px;
+  line-height: 24px;
+  color: #252519;
+  margin: 0; padding: 0;
+}
+a {
+  color: #261a3b;
+}
+  a:visited {
+    color: #261a3b;
+  }
+p {
+  margin: 0 0 15px 0;
+}
+h1, h2, h3, h4, h5, h6 {
+  margin: 40px 0 15px 0;
+}
+  h3, h4, h5, h6 {
+    margin-top: 20px;
+  }
+#container {
+  position: relative;
+}
+#background {
+  position: fixed;
+  top: 0; left: 580px; right: 0; bottom: 0;
+  background: #f5f5ff;
+  border-left: 1px solid #e5e5ee;
+  z-index: -1;
+}
+#jump_to, #jump_page {
+  background: white;
+  -webkit-box-shadow: 0 0 25px #777; -moz-box-shadow: 0 0 25px #777;
+  -webkit-border-bottom-left-radius: 5px; -moz-border-radius-bottomleft: 5px;
+  font: 10px Arial;
+  text-transform: uppercase;
+  cursor: pointer;
+  text-align: right;
+}
+#jump_to, #jump_wrapper {
+  position: fixed;
+  right: 0; top: 0;
+  padding: 5px 10px;
+}
+  #jump_wrapper {
+    padding: 0;
+    display: none;
+  }
+    #jump_to:hover #jump_wrapper {
+      display: block;
+    }
+    #jump_page {
+      padding: 5px 0 3px;
+      margin: 0 0 25px 25px;
+    }
+      #jump_page .source {
+        display: block;
+        padding: 5px 10px;
+        text-decoration: none;
+        border-top: 1px solid #eee;
+      }
+        #jump_page .source:hover {
+          background: #f5f5ff;
+        }
+        #jump_page .source:first-child {
+        }
+table td {
+  border: 0;
+  outline: 0;
+}
+  td.docs, th.docs {
+    max-width: 500px;
+    min-width: 500px;
+    min-height: 5px;
+    padding: 10px 25px 1px 50px;
+    vertical-align: top;
+    text-align: left;
+  }
+    .docs pre {
+      margin: 15px 0 15px;
+      padding-left: 15px;
+    }
+    .docs p tt, .docs p code {
+      background: #f8f8ff;
+      border: 1px solid #dedede;
+      font-size: 12px;
+      padding: 0 0.2em;
+    }
+    .octowrap {
+      position: relative;
+    }
+      .octothorpe {
+        font: 12px Arial;
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documentation/docs/grammar.html

@@ -0,0 +1,381 @@
+<!DOCTYPE html>  <html> <head>   <title>grammar.coffee</title>   <meta http-equiv="content-type" content="text/html; charset=UTF-8">   <link rel="stylesheet" media="all" href="docco.css" /> </head> <body>   <div id="container">     <div id="background"></div>            <div id="jump_to">         Jump To &hellip;         <div id="jump_wrapper">           <div id="jump_page">                                           <a class="source" href="cake.html">                 cake.coffee               </a>                                           <a class="source" href="coffee-script.html">                 coffee-script.coffee               </a>                                           <a class="source" href="command.html">                 command.coffee               </a>                                           <a class="source" href="grammar.html">                 grammar.coffee               </a>                                           <a class="source" href="lexer.html">                 lexer.coffee               </a>                                           <a class="source" href="nodes.html">                 nodes.coffee               </a>                                           <a class="source" href="optparse.html">                 optparse.coffee               </a>                                           <a class="source" href="repl.html">                 repl.coffee               </a>                                           <a class="source" href="rewriter.html">                 rewriter.coffee               </a>                                           <a class="source" href="scope.html">                 scope.coffee               </a>                        </div>         </div>       </div>          <table cellpadding="0" cellspacing="0">       <thead>         <tr>           <th class="docs">             <h1>               grammar.coffee             </h1>           </th>           <th class="code">           </th>         </tr>       </thead>       <tbody>                               <tr id="section-1">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-1">#</a>               </div>               <p>The CoffeeScript parser is generated by <a href="http://github.com/zaach/jison">Jison</a>
+from this grammar file. Jison is a bottom-up parser generator, similar in
+style to <a href="http://www.gnu.org/software/bison">Bison</a>, implemented in JavaScript.
+It can recognize <a href="http://en.wikipedia.org/wiki/LR_grammar">LALR(1), LR(0), SLR(1), and LR(1)</a>
+type grammars. To create the Jison parser, we list the pattern to match
+on the left-hand side, and the action to take (usually the creation of syntax
+tree nodes) on the right. As the parser runs, it
+shifts tokens from our token stream, from left to right, and
+<a href="http://en.wikipedia.org/wiki/Bottom-up_parsing">attempts to match</a>
+the token sequence against the rules below. When a match can be made, it
+reduces into the <a href="http://en.wikipedia.org/wiki/Terminal_and_nonterminal_symbols">nonterminal</a>
+(the enclosing name at the top), and we proceed from there.</p>
+
+<p>If you run the <code>cake build:parser</code> command, Jison constructs a parse table
+from our rules and saves it into <code>lib/parser.js</code>.</p>             </td>             <td class="code">               <div class="highlight"><pre></pre></div>             </td>           </tr>                               <tr id="section-2">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-2">#</a>               </div>               <p>The only dependency is on the <strong>Jison.Parser</strong>.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">Parser: </span><span class="nx">require</span><span class="p">(</span><span class="s1">&#39;jison&#39;</span><span class="p">).</span><span class="nx">Parser</span></pre></div>             </td>           </tr>                               <tr id="section-3">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-3">#</a>               </div>               <h2>Jison DSL</h2>             </td>             <td class="code">               <div class="highlight"><pre></pre></div>             </td>           </tr>                               <tr id="section-4">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-4">#</a>               </div>               <p>Since we're going to be wrapped in a function by Jison in any case, if our
+action immediately returns a value, we can optimize by removing the function
+wrapper and just returning the value directly.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">unwrap: </span><span class="sr">/function\s*\(\)\s*\{\s*return\s*([\s\S]*);\s*\}/</span></pre></div>             </td>           </tr>                               <tr id="section-5">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-5">#</a>               </div>               <p>Our handy DSL for Jison grammar generation, thanks to
+<a href="http://github.com/creationix">Tim Caswell</a>. For every rule in the grammar,
+we pass the pattern-defining string, the action to run, and extra options,
+optionally. If no action is specified, we simply pass the value of the
+previous nonterminal.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">o: </span><span class="p">(</span><span class="nx">pattern_string</span><span class="p">,</span> <span class="nx">action</span><span class="p">,</span> <span class="nx">options</span><span class="p">)</span> <span class="o">-&gt;</span>
+  <span class="k">return</span> <span class="p">[</span><span class="nx">pattern_string</span><span class="p">,</span> <span class="s1">&#39;$$ = $1;&#39;</span><span class="p">,</span> <span class="nx">options</span><span class="p">]</span> <span class="nx">unless</span> <span class="nx">action</span>
+  <span class="nv">action: </span><span class="k">if</span> <span class="nv">match: </span><span class="p">(</span><span class="nx">action</span> <span class="o">+</span> <span class="s1">&#39;&#39;</span><span class="p">).</span><span class="nx">match</span><span class="p">(</span><span class="nx">unwrap</span><span class="p">)</span> <span class="k">then</span> <span class="nx">match</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span> <span class="k">else</span> <span class="s2">&quot;($action())&quot;</span>
+  <span class="p">[</span><span class="nx">pattern_string</span><span class="p">,</span> <span class="s2">&quot;$$ = $action;&quot;</span><span class="p">,</span> <span class="nx">options</span><span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-6">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-6">#</a>               </div>               <h2>Grammatical Rules</h2>             </td>             <td class="code">               <div class="highlight"><pre></pre></div>             </td>           </tr>                               <tr id="section-7">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-7">#</a>               </div>               <p>In all of the rules that follow, you'll see the name of the nonterminal as
+the key to a list of alternative matches. With each match's action, the
+dollar-sign variables are provided by Jison as references to the value of
+their numeric position, so in this rule:</p>
+
+<pre><code>"Expression UNLESS Expression"
+</code></pre>
+
+<p><code>$1</code> would be the value of the first <code>Expression</code>, <code>$2</code> would be the token
+for the <code>UNLESS</code> terminal, and <code>$3</code> would be the value of the second
+<code>Expression</code>.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">grammar: </span><span class="p">{</span></pre></div>             </td>           </tr>                               <tr id="section-8">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-8">#</a>               </div>               <p>The <strong>Root</strong> is the top-level node in the syntax tree. Since we parse bottom-up,
+all parsing must end here.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">Root: </span><span class="p">[</span>
+    <span class="nx">o</span> <span class="s2">&quot;&quot;</span><span class="p">,</span>                                  <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">Expressions</span><span class="p">()</span>
+    <span class="nx">o</span> <span class="s2">&quot;TERMINATOR&quot;</span><span class="p">,</span>                        <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">Expressions</span><span class="p">()</span>
+    <span class="nx">o</span> <span class="s2">&quot;Expressions&quot;</span>
+    <span class="nx">o</span> <span class="s2">&quot;Block TERMINATOR&quot;</span>
+  <span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-9">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-9">#</a>               </div>               <p>Any list of expressions or method body, seperated by line breaks or
+semicolons.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">Expressions: </span><span class="p">[</span>
+    <span class="nx">o</span> <span class="s2">&quot;Expression&quot;</span><span class="p">,</span>                        <span class="o">-&gt;</span> <span class="nx">Expressions</span><span class="p">.</span><span class="nx">wrap</span> <span class="p">[</span><span class="nx">$1</span><span class="p">]</span>
+    <span class="nx">o</span> <span class="s2">&quot;Expressions TERMINATOR Expression&quot;</span><span class="p">,</span> <span class="o">-&gt;</span> <span class="nx">$1</span><span class="p">.</span><span class="nx">push</span> <span class="nx">$3</span>
+    <span class="nx">o</span> <span class="s2">&quot;Expressions TERMINATOR&quot;</span>
+  <span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-10">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-10">#</a>               </div>               <p>All the different types of expressions in our language. The basic unit of
+CoffeeScript is the <strong>Expression</strong> -- you'll notice that there is no
+"statement" nonterminal. Expressions serve as the building blocks
+of many other rules, making them somewhat circular.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">Expression: </span><span class="p">[</span>
+    <span class="nx">o</span> <span class="s2">&quot;Value&quot;</span>
+    <span class="nx">o</span> <span class="s2">&quot;Call&quot;</span>
+    <span class="nx">o</span> <span class="s2">&quot;Code&quot;</span>
+    <span class="nx">o</span> <span class="s2">&quot;Operation&quot;</span>
+    <span class="nx">o</span> <span class="s2">&quot;Assign&quot;</span>
+    <span class="nx">o</span> <span class="s2">&quot;If&quot;</span>
+    <span class="nx">o</span> <span class="s2">&quot;Try&quot;</span>
+    <span class="nx">o</span> <span class="s2">&quot;Throw&quot;</span>
+    <span class="nx">o</span> <span class="s2">&quot;Return&quot;</span>
+    <span class="nx">o</span> <span class="s2">&quot;While&quot;</span>
+    <span class="nx">o</span> <span class="s2">&quot;For&quot;</span>
+    <span class="nx">o</span> <span class="s2">&quot;Switch&quot;</span>
+    <span class="nx">o</span> <span class="s2">&quot;Extends&quot;</span>
+    <span class="nx">o</span> <span class="s2">&quot;Class&quot;</span>
+    <span class="nx">o</span> <span class="s2">&quot;Splat&quot;</span>
+    <span class="nx">o</span> <span class="s2">&quot;Existence&quot;</span>
+    <span class="nx">o</span> <span class="s2">&quot;Comment&quot;</span>
+  <span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-11">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-11">#</a>               </div>               <p>A an indented block of expressions. Note that the <a href="rewriter.html">Rewriter</a>
+will convert some postfix forms into blocks for us, by adjusting the
+token stream.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">Block: </span><span class="p">[</span>
+    <span class="nx">o</span> <span class="s2">&quot;INDENT Expressions OUTDENT&quot;</span><span class="p">,</span>             <span class="o">-&gt;</span> <span class="nx">$2</span>
+    <span class="nx">o</span> <span class="s2">&quot;INDENT OUTDENT&quot;</span><span class="p">,</span>                         <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">Expressions</span><span class="p">()</span>
+  <span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-12">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-12">#</a>               </div>               <p>A literal identifier, a variable name or property.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">Identifier: </span><span class="p">[</span>
+    <span class="nx">o</span> <span class="s2">&quot;IDENTIFIER&quot;</span><span class="p">,</span>                             <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">LiteralNode</span> <span class="nx">yytext</span>
+  <span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-13">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-13">#</a>               </div>               <p>Alphanumerics are separated from the other <strong>Literal</strong> matchers because
+they can also serve as keys in object literals.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">AlphaNumeric: </span><span class="p">[</span>
+    <span class="nx">o</span> <span class="s2">&quot;NUMBER&quot;</span><span class="p">,</span>                                 <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">LiteralNode</span> <span class="nx">yytext</span>
+    <span class="nx">o</span> <span class="s2">&quot;STRING&quot;</span><span class="p">,</span>                                 <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">LiteralNode</span> <span class="nx">yytext</span>
+  <span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-14">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-14">#</a>               </div>               <p>All of our immediate values. These can (in general), be passed straight
+through and printed to JavaScript.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">Literal: </span><span class="p">[</span>
+    <span class="nx">o</span> <span class="s2">&quot;AlphaNumeric&quot;</span>
+    <span class="nx">o</span> <span class="s2">&quot;JS&quot;</span><span class="p">,</span>                                     <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">LiteralNode</span> <span class="nx">yytext</span>
+    <span class="nx">o</span> <span class="s2">&quot;REGEX&quot;</span><span class="p">,</span>                                  <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">LiteralNode</span> <span class="nx">yytext</span>
+    <span class="nx">o</span> <span class="s2">&quot;BREAK&quot;</span><span class="p">,</span>                                  <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">LiteralNode</span> <span class="nx">yytext</span>
+    <span class="nx">o</span> <span class="s2">&quot;CONTINUE&quot;</span><span class="p">,</span>                               <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">LiteralNode</span> <span class="nx">yytext</span>
+    <span class="nx">o</span> <span class="s2">&quot;TRUE&quot;</span><span class="p">,</span>                                   <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">LiteralNode</span> <span class="kc">true</span>
+    <span class="nx">o</span> <span class="s2">&quot;FALSE&quot;</span><span class="p">,</span>                                  <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">LiteralNode</span> <span class="kc">false</span>
+    <span class="nx">o</span> <span class="s2">&quot;YES&quot;</span><span class="p">,</span>                                    <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">LiteralNode</span> <span class="kc">true</span>
+    <span class="nx">o</span> <span class="s2">&quot;NO&quot;</span><span class="p">,</span>                                     <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">LiteralNode</span> <span class="kc">false</span>
+    <span class="nx">o</span> <span class="s2">&quot;ON&quot;</span><span class="p">,</span>                                     <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">LiteralNode</span> <span class="kc">true</span>
+    <span class="nx">o</span> <span class="s2">&quot;OFF&quot;</span><span class="p">,</span>                                    <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">LiteralNode</span> <span class="kc">false</span>
+  <span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-15">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-15">#</a>               </div>               <p>Assignment of a variable, property, or index to a value.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">Assign: </span><span class="p">[</span>
+    <span class="nx">o</span> <span class="s2">&quot;Value ASSIGN Expression&quot;</span><span class="p">,</span>                <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">AssignNode</span> <span class="nx">$1</span><span class="p">,</span> <span class="nx">$3</span>
+  <span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-16">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-16">#</a>               </div>               <p>Assignment when it happens within an object literal. The difference from
+the ordinary <strong>Assign</strong> is that these allow numbers and strings as keys.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">AssignObj: </span><span class="p">[</span>
+    <span class="nx">o</span> <span class="s2">&quot;Identifier ASSIGN Expression&quot;</span><span class="p">,</span>           <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">AssignNode</span> <span class="k">new</span> <span class="nx">ValueNode</span><span class="p">(</span><span class="nx">$1</span><span class="p">),</span> <span class="nx">$3</span><span class="p">,</span> <span class="s1">&#39;object&#39;</span>
+    <span class="nx">o</span> <span class="s2">&quot;AlphaNumeric ASSIGN Expression&quot;</span><span class="p">,</span>         <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">AssignNode</span> <span class="k">new</span> <span class="nx">ValueNode</span><span class="p">(</span><span class="nx">$1</span><span class="p">),</span> <span class="nx">$3</span><span class="p">,</span> <span class="s1">&#39;object&#39;</span>
+    <span class="nx">o</span> <span class="s2">&quot;Comment&quot;</span>
+  <span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-17">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-17">#</a>               </div>               <p>A return statement from a function body.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">Return: </span><span class="p">[</span>
+    <span class="nx">o</span> <span class="s2">&quot;RETURN Expression&quot;</span><span class="p">,</span>                      <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">ReturnNode</span> <span class="nx">$2</span>
+    <span class="nx">o</span> <span class="s2">&quot;RETURN&quot;</span><span class="p">,</span>                                 <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">ReturnNode</span> <span class="k">new</span> <span class="nx">ValueNode</span> <span class="k">new</span> <span class="nx">LiteralNode</span> <span class="s1">&#39;null&#39;</span>
+  <span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-18">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-18">#</a>               </div>               <p>A comment. Because CoffeeScript passes comments through to JavaScript, we
+have to parse comments like any other construct, and identify all of the
+positions in which they can occur in the grammar.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">Comment: </span><span class="p">[</span>
+    <span class="nx">o</span> <span class="s2">&quot;COMMENT&quot;</span><span class="p">,</span>                                <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">CommentNode</span> <span class="nx">yytext</span>
+  <span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-19">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-19">#</a>               </div>               <p><a href="http://jashkenas.github.com/coffee-script/#existence">The existential operator</a>.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">Existence: </span><span class="p">[</span>
+    <span class="nx">o</span> <span class="s2">&quot;Expression ?&quot;</span><span class="p">,</span>                           <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">ExistenceNode</span> <span class="nx">$1</span>
+  <span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-20">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-20">#</a>               </div>               <p>The <strong>Code</strong> node is the function literal. It's defined by an indented block
+of <strong>Expressions</strong> preceded by a function arrow, with an optional parameter
+list.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">Code: </span><span class="p">[</span>
+    <span class="nx">o</span> <span class="s2">&quot;PARAM_START ParamList PARAM_END FuncGlyph Block&quot;</span><span class="p">,</span> <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">CodeNode</span> <span class="nx">$2</span><span class="p">,</span> <span class="nx">$5</span><span class="p">,</span> <span class="nx">$4</span>
+    <span class="nx">o</span> <span class="s2">&quot;FuncGlyph Block&quot;</span><span class="p">,</span>                        <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">CodeNode</span> <span class="p">[],</span> <span class="nx">$2</span><span class="p">,</span> <span class="nx">$1</span>
+  <span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-21">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-21">#</a>               </div>               <p>CoffeeScript has two different symbols for functions. <code>-&gt;</code> is for ordinary
+functions, and <code>=&gt;</code> is for functions bound to the current value of <em>this</em>.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">FuncGlyph: </span><span class="p">[</span>
+    <span class="nx">o</span> <span class="s2">&quot;-&gt;&quot;</span><span class="p">,</span>                                     <span class="o">-&gt;</span> <span class="s1">&#39;func&#39;</span>
+    <span class="nx">o</span> <span class="s2">&quot;=&gt;&quot;</span><span class="p">,</span>                                     <span class="o">-&gt;</span> <span class="s1">&#39;boundfunc&#39;</span>
+  <span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-22">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-22">#</a>               </div>               <p>The list of parameters that a function accepts can be of any length.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">ParamList: </span><span class="p">[</span>
+    <span class="nx">o</span> <span class="s2">&quot;&quot;</span><span class="p">,</span>                                       <span class="o">-&gt;</span> <span class="p">[]</span>
+    <span class="nx">o</span> <span class="s2">&quot;Param&quot;</span><span class="p">,</span>                                  <span class="o">-&gt;</span> <span class="p">[</span><span class="nx">$1</span><span class="p">]</span>
+    <span class="nx">o</span> <span class="s2">&quot;ParamList , Param&quot;</span><span class="p">,</span>                      <span class="o">-&gt;</span> <span class="nx">$1</span><span class="p">.</span><span class="nx">concat</span> <span class="p">[</span><span class="nx">$3</span><span class="p">]</span>
+  <span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-23">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-23">#</a>               </div>               <p>A single parameter in a function definition can be ordinary, or a splat
+that hoovers up the remaining arguments.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">Param: </span><span class="p">[</span>
+    <span class="nx">o</span> <span class="s2">&quot;PARAM&quot;</span><span class="p">,</span>                                  <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">LiteralNode</span> <span class="nx">yytext</span>
+    <span class="nx">o</span> <span class="s2">&quot;Param . . .&quot;</span><span class="p">,</span>                            <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">SplatNode</span> <span class="nx">$1</span>
+  <span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-24">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-24">#</a>               </div>               <p>A splat that occurs outside of a parameter list.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">Splat: </span><span class="p">[</span>
+    <span class="nx">o</span> <span class="s2">&quot;Expression . . .&quot;</span><span class="p">,</span>                       <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">SplatNode</span> <span class="nx">$1</span>
+  <span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-25">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-25">#</a>               </div>               <p>The types of things that can be treated as values -- assigned to, invoked
+as functions, indexed into, named as a class, etc.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">Value: </span><span class="p">[</span>
+    <span class="nx">o</span> <span class="s2">&quot;Identifier&quot;</span><span class="p">,</span>                             <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">ValueNode</span> <span class="nx">$1</span>
+    <span class="nx">o</span> <span class="s2">&quot;Literal&quot;</span><span class="p">,</span>                                <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">ValueNode</span> <span class="nx">$1</span>
+    <span class="nx">o</span> <span class="s2">&quot;Array&quot;</span><span class="p">,</span>                                  <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">ValueNode</span> <span class="nx">$1</span>
+    <span class="nx">o</span> <span class="s2">&quot;Object&quot;</span><span class="p">,</span>                                 <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">ValueNode</span> <span class="nx">$1</span>
+    <span class="nx">o</span> <span class="s2">&quot;Parenthetical&quot;</span><span class="p">,</span>                          <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">ValueNode</span> <span class="nx">$1</span>
+    <span class="nx">o</span> <span class="s2">&quot;Range&quot;</span><span class="p">,</span>                                  <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">ValueNode</span> <span class="nx">$1</span>
+    <span class="nx">o</span> <span class="s2">&quot;This&quot;</span>
+    <span class="nx">o</span> <span class="s2">&quot;Value Accessor&quot;</span><span class="p">,</span>                         <span class="o">-&gt;</span> <span class="nx">$1</span><span class="p">.</span><span class="nx">push</span> <span class="nx">$2</span>
+    <span class="nx">o</span> <span class="s2">&quot;Invocation Accessor&quot;</span><span class="p">,</span>                    <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">ValueNode</span> <span class="nx">$1</span><span class="p">,</span> <span class="p">[</span><span class="nx">$2</span><span class="p">]</span>
+  <span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-26">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-26">#</a>               </div>               <p>The general group of accessors into an object, by property, by prototype
+or by array index or slice.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">Accessor: </span><span class="p">[</span>
+    <span class="nx">o</span> <span class="s2">&quot;PROPERTY_ACCESS Identifier&quot;</span><span class="p">,</span>             <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">AccessorNode</span> <span class="nx">$2</span>
+    <span class="nx">o</span> <span class="s2">&quot;PROTOTYPE_ACCESS Identifier&quot;</span><span class="p">,</span>            <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">AccessorNode</span> <span class="nx">$2</span><span class="p">,</span> <span class="s1">&#39;prototype&#39;</span>
+    <span class="nx">o</span> <span class="s2">&quot;SOAK_ACCESS Identifier&quot;</span><span class="p">,</span>                 <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">AccessorNode</span> <span class="nx">$2</span><span class="p">,</span> <span class="s1">&#39;soak&#39;</span>
+    <span class="nx">o</span> <span class="s2">&quot;Index&quot;</span>
+    <span class="nx">o</span> <span class="s2">&quot;Slice&quot;</span><span class="p">,</span>                                  <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">SliceNode</span> <span class="nx">$1</span>
+  <span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-27">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-27">#</a>               </div>               <p>Indexing into an object or array using bracket notation.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">Index: </span><span class="p">[</span>
+    <span class="nx">o</span> <span class="s2">&quot;INDEX_START Expression INDEX_END&quot;</span><span class="p">,</span>       <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">IndexNode</span> <span class="nx">$2</span>
+    <span class="nx">o</span> <span class="s2">&quot;SOAKED_INDEX_START Expression SOAKED_INDEX_END&quot;</span><span class="p">,</span> <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">IndexNode</span> <span class="nx">$2</span><span class="p">,</span> <span class="s1">&#39;soak&#39;</span>
+  <span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-28">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-28">#</a>               </div>               <p>In CoffeeScript, an object literal is simply a list of assignments.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nb">Object</span><span class="o">:</span> <span class="p">[</span>
+    <span class="nx">o</span> <span class="s2">&quot;{ AssignList }&quot;</span><span class="p">,</span>                         <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">ObjectNode</span> <span class="nx">$2</span>
+    <span class="nx">o</span> <span class="s2">&quot;{ IndentedAssignList }&quot;</span><span class="p">,</span>                 <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">ObjectNode</span> <span class="nx">$2</span>
+  <span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-29">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-29">#</a>               </div>               <p>Class definitions have optional bodies of prototype property assignments,
+and optional references to the superclass.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">Class: </span><span class="p">[</span>
+    <span class="nx">o</span> <span class="s2">&quot;CLASS Value&quot;</span><span class="p">,</span>                            <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">ClassNode</span> <span class="nx">$2</span>
+    <span class="nx">o</span> <span class="s2">&quot;CLASS Value EXTENDS Value&quot;</span><span class="p">,</span>              <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">ClassNode</span> <span class="nx">$2</span><span class="p">,</span> <span class="nx">$4</span>
+    <span class="nx">o</span> <span class="s2">&quot;CLASS Value IndentedAssignList&quot;</span><span class="p">,</span>         <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">ClassNode</span> <span class="nx">$2</span><span class="p">,</span> <span class="kc">null</span><span class="p">,</span> <span class="nx">$3</span>
+    <span class="nx">o</span> <span class="s2">&quot;CLASS Value EXTENDS Value IndentedAssignList&quot;</span><span class="p">,</span> <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">ClassNode</span> <span class="nx">$2</span><span class="p">,</span> <span class="nx">$4</span><span class="p">,</span> <span class="nx">$5</span>
+  <span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-30">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-30">#</a>               </div>               <p>Assignment of properties within an object literal can be separated by
+comma, as in JavaScript, or simply by newline.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">AssignList: </span><span class="p">[</span>
+    <span class="nx">o</span> <span class="s2">&quot;&quot;</span><span class="p">,</span>                                       <span class="o">-&gt;</span> <span class="p">[]</span>
+    <span class="nx">o</span> <span class="s2">&quot;AssignObj&quot;</span><span class="p">,</span>                              <span class="o">-&gt;</span> <span class="p">[</span><span class="nx">$1</span><span class="p">]</span>
+    <span class="nx">o</span> <span class="s2">&quot;AssignList , AssignObj&quot;</span><span class="p">,</span>                 <span class="o">-&gt;</span> <span class="nx">$1</span><span class="p">.</span><span class="nx">concat</span> <span class="p">[</span><span class="nx">$3</span><span class="p">]</span>
+    <span class="nx">o</span> <span class="s2">&quot;AssignList TERMINATOR AssignObj&quot;</span><span class="p">,</span>        <span class="o">-&gt;</span> <span class="nx">$1</span><span class="p">.</span><span class="nx">concat</span> <span class="p">[</span><span class="nx">$3</span><span class="p">]</span>
+    <span class="nx">o</span> <span class="s2">&quot;AssignList , TERMINATOR AssignObj&quot;</span><span class="p">,</span>      <span class="o">-&gt;</span> <span class="nx">$1</span><span class="p">.</span><span class="nx">concat</span> <span class="p">[</span><span class="nx">$4</span><span class="p">]</span>
+  <span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-31">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-31">#</a>               </div>               <p>An <strong>AssignList</strong> within a block indentation.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">IndentedAssignList: </span><span class="p">[</span>
+    <span class="nx">o</span> <span class="s2">&quot;INDENT AssignList OUTDENT&quot;</span><span class="p">,</span>              <span class="o">-&gt;</span> <span class="nx">$2</span>
+  <span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-32">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-32">#</a>               </div>               <p>The three flavors of function call: normal, object instantiation with <code>new</code>,
+and calling <code>super()</code></p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">Call: </span><span class="p">[</span>
+    <span class="nx">o</span> <span class="s2">&quot;Invocation&quot;</span>
+    <span class="nx">o</span> <span class="s2">&quot;NEW Invocation&quot;</span><span class="p">,</span>                         <span class="o">-&gt;</span> <span class="nx">$2</span><span class="p">.</span><span class="nx">new_instance</span><span class="p">()</span>
+    <span class="nx">o</span> <span class="s2">&quot;Super&quot;</span>
+  <span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-33">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-33">#</a>               </div>               <p>Extending an object by setting its prototype chain to reference a parent
+object.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">Extends: </span><span class="p">[</span>
+    <span class="nx">o</span> <span class="s2">&quot;Value EXTENDS Value&quot;</span><span class="p">,</span>                    <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">ExtendsNode</span> <span class="nx">$1</span><span class="p">,</span> <span class="nx">$3</span>
+  <span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-34">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-34">#</a>               </div>               <p>Ordinary function invocation, or a chained series of calls.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">Invocation: </span><span class="p">[</span>
+    <span class="nx">o</span> <span class="s2">&quot;Value Arguments&quot;</span><span class="p">,</span>                        <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">CallNode</span> <span class="nx">$1</span><span class="p">,</span> <span class="nx">$2</span>
+    <span class="nx">o</span> <span class="s2">&quot;Invocation Arguments&quot;</span><span class="p">,</span>                   <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">CallNode</span> <span class="nx">$1</span><span class="p">,</span> <span class="nx">$2</span>
+  <span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-35">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-35">#</a>               </div>               <p>The list of arguments to a function call.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">Arguments: </span><span class="p">[</span>
+    <span class="nx">o</span> <span class="s2">&quot;CALL_START ArgList CALL_END&quot;</span><span class="p">,</span>            <span class="o">-&gt;</span> <span class="nx">$2</span>
+  <span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-36">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-36">#</a>               </div>               <p>Calling super.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">Super: </span><span class="p">[</span>
+    <span class="nx">o</span> <span class="s2">&quot;SUPER CALL_START ArgList CALL_END&quot;</span><span class="p">,</span>      <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">CallNode</span> <span class="s1">&#39;super&#39;</span><span class="p">,</span> <span class="nx">$3</span>
+  <span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-37">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-37">#</a>               </div>               <p>A reference to the <em>this</em> current object, either naked or to a property.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">This: </span><span class="p">[</span>
+    <span class="nx">o</span> <span class="s2">&quot;@&quot;</span><span class="p">,</span>                                      <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">ValueNode</span> <span class="k">new</span> <span class="nx">LiteralNode</span> <span class="s1">&#39;this&#39;</span>
+    <span class="nx">o</span> <span class="s2">&quot;@ Identifier&quot;</span><span class="p">,</span>                           <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">ValueNode</span> <span class="k">new</span> <span class="nx">LiteralNode</span><span class="p">(</span><span class="s1">&#39;this&#39;</span><span class="p">),</span> <span class="p">[</span><span class="k">new</span> <span class="nx">AccessorNode</span><span class="p">(</span><span class="nx">$2</span><span class="p">)]</span>
+  <span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-38">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-38">#</a>               </div>               <p>The CoffeeScript range literal.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">Range: </span><span class="p">[</span>
+    <span class="nx">o</span> <span class="s2">&quot;[ Expression . . Expression ]&quot;</span><span class="p">,</span>          <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">RangeNode</span> <span class="nx">$2</span><span class="p">,</span> <span class="nx">$5</span>
+    <span class="nx">o</span> <span class="s2">&quot;[ Expression . . . Expression ]&quot;</span><span class="p">,</span>        <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">RangeNode</span> <span class="nx">$2</span><span class="p">,</span> <span class="nx">$6</span><span class="p">,</span> <span class="kc">true</span>
+  <span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-39">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-39">#</a>               </div>               <p>The slice literal.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">Slice: </span><span class="p">[</span>
+    <span class="nx">o</span> <span class="s2">&quot;INDEX_START Expression . . Expression INDEX_END&quot;</span><span class="p">,</span> <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">RangeNode</span> <span class="nx">$2</span><span class="p">,</span> <span class="nx">$5</span>
+    <span class="nx">o</span> <span class="s2">&quot;INDEX_START Expression . . . Expression INDEX_END&quot;</span><span class="p">,</span> <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">RangeNode</span> <span class="nx">$2</span><span class="p">,</span> <span class="nx">$6</span><span class="p">,</span> <span class="kc">true</span>
+  <span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-40">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-40">#</a>               </div>               <p>The array literal.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nb">Array</span><span class="o">:</span> <span class="p">[</span>
+    <span class="nx">o</span> <span class="s2">&quot;[ ArgList ]&quot;</span><span class="p">,</span>                            <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">ArrayNode</span> <span class="nx">$2</span>
+  <span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-41">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-41">#</a>               </div>               <p>The <strong>ArgList</strong> is both the list of objects passed into a function call,
+as well as the contents of an array literal
+(i.e. comma-separated expressions). Newlines work as well.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">ArgList: </span><span class="p">[</span>
+    <span class="nx">o</span> <span class="s2">&quot;&quot;</span><span class="p">,</span>                                       <span class="o">-&gt;</span> <span class="p">[]</span>
+    <span class="nx">o</span> <span class="s2">&quot;Expression&quot;</span><span class="p">,</span>                             <span class="o">-&gt;</span> <span class="p">[</span><span class="nx">$1</span><span class="p">]</span>
+    <span class="nx">o</span> <span class="s2">&quot;INDENT Expression&quot;</span><span class="p">,</span>                      <span class="o">-&gt;</span> <span class="p">[</span><span class="nx">$2</span><span class="p">]</span>
+    <span class="nx">o</span> <span class="s2">&quot;ArgList , Expression&quot;</span><span class="p">,</span>                   <span class="o">-&gt;</span> <span class="nx">$1</span><span class="p">.</span><span class="nx">concat</span> <span class="p">[</span><span class="nx">$3</span><span class="p">]</span>
+    <span class="nx">o</span> <span class="s2">&quot;ArgList TERMINATOR Expression&quot;</span><span class="p">,</span>          <span class="o">-&gt;</span> <span class="nx">$1</span><span class="p">.</span><span class="nx">concat</span> <span class="p">[</span><span class="nx">$3</span><span class="p">]</span>
+    <span class="nx">o</span> <span class="s2">&quot;ArgList , TERMINATOR Expression&quot;</span><span class="p">,</span>        <span class="o">-&gt;</span> <span class="nx">$1</span><span class="p">.</span><span class="nx">concat</span> <span class="p">[</span><span class="nx">$4</span><span class="p">]</span>
+    <span class="nx">o</span> <span class="s2">&quot;ArgList , INDENT Expression&quot;</span><span class="p">,</span>            <span class="o">-&gt;</span> <span class="nx">$1</span><span class="p">.</span><span class="nx">concat</span> <span class="p">[</span><span class="nx">$4</span><span class="p">]</span>
+    <span class="nx">o</span> <span class="s2">&quot;ArgList OUTDENT&quot;</span>
+  <span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-42">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-42">#</a>               </div>               <p>Just simple, comma-separated, required arguments (no fancy syntax). We need
+this to be separate from the <strong>ArgList</strong> for use in <strong>Switch</strong> blocks, where
+having the newlines wouldn't make sense.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">SimpleArgs: </span><span class="p">[</span>
+    <span class="nx">o</span> <span class="s2">&quot;Expression&quot;</span>
+    <span class="nx">o</span> <span class="s2">&quot;SimpleArgs , Expression&quot;</span><span class="p">,</span>                <span class="o">-&gt;</span>
+      <span class="k">if</span> <span class="nx">$1</span> <span class="k">instanceof</span> <span class="nb">Array</span> <span class="k">then</span> <span class="nx">$1</span><span class="p">.</span><span class="nx">concat</span><span class="p">([</span><span class="nx">$3</span><span class="p">])</span> <span class="k">else</span> <span class="p">[</span><span class="nx">$1</span><span class="p">].</span><span class="nx">concat</span><span class="p">([</span><span class="nx">$3</span><span class="p">])</span>
+  <span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-43">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-43">#</a>               </div>               <p>The variants of <em>try/catch/finally</em> exception handling blocks.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">Try: </span><span class="p">[</span>
+    <span class="nx">o</span> <span class="s2">&quot;TRY Block Catch&quot;</span><span class="p">,</span>                        <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">TryNode</span> <span class="nx">$2</span><span class="p">,</span> <span class="nx">$3</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="nx">$3</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span>
+    <span class="nx">o</span> <span class="s2">&quot;TRY Block FINALLY Block&quot;</span><span class="p">,</span>                <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">TryNode</span> <span class="nx">$2</span><span class="p">,</span> <span class="kc">null</span><span class="p">,</span> <span class="kc">null</span><span class="p">,</span> <span class="nx">$4</span>
+    <span class="nx">o</span> <span class="s2">&quot;TRY Block Catch FINALLY Block&quot;</span><span class="p">,</span>          <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">TryNode</span> <span class="nx">$2</span><span class="p">,</span> <span class="nx">$3</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="nx">$3</span><span class="p">[</span><span class="mi">1</span><span class="p">],</span> <span class="nx">$5</span>
+  <span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-44">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-44">#</a>               </div>               <p>A catch clause names its error and runs a block of code.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">Catch: </span><span class="p">[</span>
+    <span class="nx">o</span> <span class="s2">&quot;CATCH Identifier Block&quot;</span><span class="p">,</span>                 <span class="o">-&gt;</span> <span class="p">[</span><span class="nx">$2</span><span class="p">,</span> <span class="nx">$3</span><span class="p">]</span>
+  <span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-45">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-45">#</a>               </div>               <p>Throw an exception object.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">Throw: </span><span class="p">[</span>
+    <span class="nx">o</span> <span class="s2">&quot;THROW Expression&quot;</span><span class="p">,</span>                       <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">ThrowNode</span> <span class="nx">$2</span>
+  <span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-46">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-46">#</a>               </div>               <p>Parenthetical expressions. Note that the <strong>Parenthetical</strong> is a <strong>Value</strong>,
+not an <strong>Expression</strong>, so if you need to use an expression in a place
+where only values are accepted, wrapping it in parentheses will always do
+the trick.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">Parenthetical: </span><span class="p">[</span>
+    <span class="nx">o</span> <span class="s2">&quot;( Expression )&quot;</span><span class="p">,</span>                         <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">ParentheticalNode</span> <span class="nx">$2</span>
+  <span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-47">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-47">#</a>               </div>               <p>The condition portion of a while loop.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">WhileSource: </span><span class="p">[</span>
+    <span class="nx">o</span> <span class="s2">&quot;WHILE Expression&quot;</span><span class="p">,</span>                       <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">WhileNode</span> <span class="nx">$2</span>
+    <span class="nx">o</span> <span class="s2">&quot;WHILE Expression WHEN Expression&quot;</span><span class="p">,</span>       <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">WhileNode</span> <span class="nx">$2</span><span class="p">,</span> <span class="p">{</span><span class="nx">filter</span> <span class="o">:</span> <span class="nx">$4</span><span class="p">}</span>
+  <span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-48">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-48">#</a>               </div>               <p>The while loop can either be normal, with a block of expressions to execute,
+or postfix, with a single expression. There is no do..while.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">While: </span><span class="p">[</span>
+    <span class="nx">o</span> <span class="s2">&quot;WhileSource Block&quot;</span><span class="p">,</span>                      <span class="o">-&gt;</span> <span class="nx">$1</span><span class="p">.</span><span class="nx">add_body</span> <span class="nx">$2</span>
+    <span class="nx">o</span> <span class="s2">&quot;Expression WhileSource&quot;</span><span class="p">,</span>                 <span class="o">-&gt;</span> <span class="nx">$2</span><span class="p">.</span><span class="nx">add_body</span> <span class="nx">$1</span>
+  <span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-49">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-49">#</a>               </div>               <p>Array, object, and range comprehensions, at the most generic level.
+Comprehensions can either be normal, with a block of expressions to execute,
+or postfix, with a single expression.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">For: </span><span class="p">[</span>
+    <span class="nx">o</span> <span class="s2">&quot;Expression FOR ForVariables ForSource&quot;</span><span class="p">,</span>  <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">ForNode</span> <span class="nx">$1</span><span class="p">,</span> <span class="nx">$4</span><span class="p">,</span> <span class="nx">$3</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="nx">$3</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span>
+    <span class="nx">o</span> <span class="s2">&quot;FOR ForVariables ForSource Block&quot;</span><span class="p">,</span>       <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">ForNode</span> <span class="nx">$4</span><span class="p">,</span> <span class="nx">$3</span><span class="p">,</span> <span class="nx">$2</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="nx">$2</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span>
+  <span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-50">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-50">#</a>               </div>               <p>An array or range comprehension has variables for the current element and
+(optional) reference to the current index. Or, <em>key, value</em>, in the case
+of object comprehensions.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">ForVariables: </span><span class="p">[</span>
+    <span class="nx">o</span> <span class="s2">&quot;Identifier&quot;</span><span class="p">,</span>                             <span class="o">-&gt;</span> <span class="p">[</span><span class="nx">$1</span><span class="p">]</span>
+    <span class="nx">o</span> <span class="s2">&quot;Identifier , Identifier&quot;</span><span class="p">,</span>                <span class="o">-&gt;</span> <span class="p">[</span><span class="nx">$1</span><span class="p">,</span> <span class="nx">$3</span><span class="p">]</span>
+  <span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-51">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-51">#</a>               </div>               <p>The source of a comprehension is an array or object with an optional filter
+clause. If it's an array comprehension, you can also choose to step throug
+in fixed-size increments.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">ForSource: </span><span class="p">[</span>
+    <span class="nx">o</span> <span class="s2">&quot;IN Expression&quot;</span><span class="p">,</span>                          <span class="o">-&gt;</span> <span class="p">{</span><span class="nv">source: </span>  <span class="nx">$2</span><span class="p">}</span>
+    <span class="nx">o</span> <span class="s2">&quot;OF Expression&quot;</span><span class="p">,</span>                          <span class="o">-&gt;</span> <span class="p">{</span><span class="nv">source: </span>  <span class="nx">$2</span><span class="p">,</span> <span class="nv">object: </span><span class="kc">true</span><span class="p">}</span>
+    <span class="nx">o</span> <span class="s2">&quot;ForSource WHEN Expression&quot;</span><span class="p">,</span>              <span class="o">-&gt;</span> <span class="nv">$1.filter: </span><span class="nx">$3</span><span class="p">;</span> <span class="nx">$1</span>
+    <span class="nx">o</span> <span class="s2">&quot;ForSource BY Expression&quot;</span><span class="p">,</span>                <span class="o">-&gt;</span> <span class="nv">$1.step: </span>  <span class="nx">$3</span><span class="p">;</span> <span class="nx">$1</span>
+  <span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-52">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-52">#</a>               </div>               <p>The CoffeeScript switch/when/else block replaces the JavaScript
+switch/case/default by compiling into an if-else chain.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">Switch: </span><span class="p">[</span>
+    <span class="nx">o</span> <span class="s2">&quot;SWITCH Expression INDENT Whens OUTDENT&quot;</span><span class="p">,</span> <span class="o">-&gt;</span> <span class="nx">$4</span><span class="p">.</span><span class="nx">rewrite_condition</span> <span class="nx">$2</span>
+    <span class="nx">o</span> <span class="s2">&quot;SWITCH Expression INDENT Whens ELSE Block OUTDENT&quot;</span><span class="p">,</span> <span class="o">-&gt;</span> <span class="nx">$4</span><span class="p">.</span><span class="nx">rewrite_condition</span><span class="p">(</span><span class="nx">$2</span><span class="p">).</span><span class="nx">add_else</span> <span class="nx">$6</span><span class="p">,</span> <span class="kc">true</span>
+  <span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-53">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-53">#</a>               </div>               <p>The inner list of whens is left recursive. At code-generation time, the
+IfNode will rewrite them into a proper chain.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">Whens: </span><span class="p">[</span>
+    <span class="nx">o</span> <span class="s2">&quot;When&quot;</span>
+    <span class="nx">o</span> <span class="s2">&quot;Whens When&quot;</span><span class="p">,</span>                             <span class="o">-&gt;</span> <span class="nx">$1</span><span class="p">.</span><span class="nx">push</span> <span class="nx">$2</span>
+  <span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-54">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-54">#</a>               </div>               <p>An individual <strong>When</strong> clause, with action.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">When: </span><span class="p">[</span>
+    <span class="nx">o</span> <span class="s2">&quot;LEADING_WHEN SimpleArgs Block&quot;</span><span class="p">,</span>          <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">IfNode</span> <span class="nx">$2</span><span class="p">,</span> <span class="nx">$3</span><span class="p">,</span> <span class="kc">null</span><span class="p">,</span> <span class="p">{</span><span class="nv">statement: </span><span class="kc">true</span><span class="p">}</span>
+    <span class="nx">o</span> <span class="s2">&quot;LEADING_WHEN SimpleArgs Block TERMINATOR&quot;</span><span class="p">,</span> <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">IfNode</span> <span class="nx">$2</span><span class="p">,</span> <span class="nx">$3</span><span class="p">,</span> <span class="kc">null</span><span class="p">,</span> <span class="p">{</span><span class="nv">statement: </span><span class="kc">true</span><span class="p">}</span>
+    <span class="nx">o</span> <span class="s2">&quot;Comment TERMINATOR When&quot;</span><span class="p">,</span>                <span class="o">-&gt;</span> <span class="nv">$3.comment: </span><span class="nx">$1</span><span class="p">;</span> <span class="nx">$3</span>
+  <span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-55">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-55">#</a>               </div>               <p>The most basic form of <em>if</em> is a condition and an action. The following
+if-related rules are broken up along these lines in order to avoid
+ambiguity.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">IfStart: </span><span class="p">[</span>
+    <span class="nx">o</span> <span class="s2">&quot;IF Expression Block&quot;</span><span class="p">,</span>                    <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">IfNode</span> <span class="nx">$2</span><span class="p">,</span> <span class="nx">$3</span>
+    <span class="nx">o</span> <span class="s2">&quot;IfStart ElsIf&quot;</span><span class="p">,</span>                          <span class="o">-&gt;</span> <span class="nx">$1</span><span class="p">.</span><span class="nx">add_else</span> <span class="nx">$2</span>
+  <span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-56">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-56">#</a>               </div>               <p>An <strong>IfStart</strong> can optionally be followed by an else block.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">IfBlock: </span><span class="p">[</span>
+    <span class="nx">o</span> <span class="s2">&quot;IfStart&quot;</span>
+    <span class="nx">o</span> <span class="s2">&quot;IfStart ELSE Block&quot;</span><span class="p">,</span>                     <span class="o">-&gt;</span> <span class="nx">$1</span><span class="p">.</span><span class="nx">add_else</span> <span class="nx">$3</span>
+  <span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-57">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-57">#</a>               </div>               <p>An <em>else if</em> continuation of the <em>if</em> expression.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">ElsIf: </span><span class="p">[</span>
+    <span class="nx">o</span> <span class="s2">&quot;ELSE IF Expression Block&quot;</span><span class="p">,</span>               <span class="o">-&gt;</span> <span class="p">(</span><span class="k">new</span> <span class="nx">IfNode</span><span class="p">(</span><span class="nx">$3</span><span class="p">,</span> <span class="nx">$4</span><span class="p">)).</span><span class="nx">force_statement</span><span class="p">()</span>
+  <span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-58">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-58">#</a>               </div>               <p>The full complement of <em>if</em> expressions, including postfix one-liner
+<em>if</em> and <em>unless</em>.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">If: </span><span class="p">[</span>
+    <span class="nx">o</span> <span class="s2">&quot;IfBlock&quot;</span>
+    <span class="nx">o</span> <span class="s2">&quot;Expression IF Expression&quot;</span><span class="p">,</span>               <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">IfNode</span> <span class="nx">$3</span><span class="p">,</span> <span class="nx">Expressions</span><span class="p">.</span><span class="nx">wrap</span><span class="p">([</span><span class="nx">$1</span><span class="p">]),</span> <span class="kc">null</span><span class="p">,</span> <span class="p">{</span><span class="nv">statement: </span><span class="kc">true</span><span class="p">}</span>
+    <span class="nx">o</span> <span class="s2">&quot;Expression UNLESS Expression&quot;</span><span class="p">,</span>           <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">IfNode</span> <span class="nx">$3</span><span class="p">,</span> <span class="nx">Expressions</span><span class="p">.</span><span class="nx">wrap</span><span class="p">([</span><span class="nx">$1</span><span class="p">]),</span> <span class="kc">null</span><span class="p">,</span> <span class="p">{</span><span class="nv">statement: </span><span class="kc">true</span><span class="p">,</span> <span class="nv">invert: </span><span class="kc">true</span><span class="p">}</span>
+  <span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-59">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-59">#</a>               </div>               <p>Arithmetic and logical operators, working on one or more operands.
+Here they are grouped by order of precedence. The actual precedence rules
+are defined at the bottom of the page. It would be shorter if we could
+combine most of these rules into a single generic <em>Operand OpSymbol Operand</em>
+-type rule, but in order to make the precedence binding possible, separate
+rules are necessary.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">Operation: </span><span class="p">[</span>
+    <span class="nx">o</span> <span class="s2">&quot;! Expression&quot;</span><span class="p">,</span>                           <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">OpNode</span> <span class="s1">&#39;!&#39;</span><span class="p">,</span> <span class="nx">$2</span>
+    <span class="nx">o</span> <span class="s2">&quot;!! Expression&quot;</span><span class="p">,</span>                          <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">OpNode</span> <span class="s1">&#39;!!&#39;</span><span class="p">,</span> <span class="nx">$2</span>
+    <span class="nx">o</span><span class="p">(</span><span class="s2">&quot;- Expression&quot;</span><span class="p">,</span>                           <span class="p">(</span><span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">OpNode</span><span class="p">(</span><span class="s1">&#39;-&#39;</span><span class="p">,</span> <span class="nx">$2</span><span class="p">)),</span> <span class="p">{</span><span class="nv">prec: </span><span class="s1">&#39;UMINUS&#39;</span><span class="p">})</span>
+    <span class="nx">o</span><span class="p">(</span><span class="s2">&quot;+ Expression&quot;</span><span class="p">,</span>                           <span class="p">(</span><span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">OpNode</span><span class="p">(</span><span class="s1">&#39;+&#39;</span><span class="p">,</span> <span class="nx">$2</span><span class="p">)),</span> <span class="p">{</span><span class="nv">prec: </span><span class="s1">&#39;UPLUS&#39;</span><span class="p">})</span>
+    <span class="nx">o</span> <span class="s2">&quot;NOT Expression&quot;</span><span class="p">,</span>                         <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">OpNode</span> <span class="s1">&#39;not&#39;</span><span class="p">,</span> <span class="nx">$2</span>
+    <span class="nx">o</span> <span class="s2">&quot;~ Expression&quot;</span><span class="p">,</span>                           <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">OpNode</span> <span class="s1">&#39;~&#39;</span><span class="p">,</span> <span class="nx">$2</span>
+    <span class="nx">o</span> <span class="s2">&quot;-- Expression&quot;</span><span class="p">,</span>                          <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">OpNode</span> <span class="s1">&#39;--&#39;</span><span class="p">,</span> <span class="nx">$2</span>
+    <span class="nx">o</span> <span class="s2">&quot;++ Expression&quot;</span><span class="p">,</span>                          <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">OpNode</span> <span class="s1">&#39;++&#39;</span><span class="p">,</span> <span class="nx">$2</span>
+    <span class="nx">o</span> <span class="s2">&quot;DELETE Expression&quot;</span><span class="p">,</span>                      <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">OpNode</span> <span class="s1">&#39;delete&#39;</span><span class="p">,</span> <span class="nx">$2</span>
+    <span class="nx">o</span> <span class="s2">&quot;TYPEOF Expression&quot;</span><span class="p">,</span>                      <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">OpNode</span> <span class="s1">&#39;typeof&#39;</span><span class="p">,</span> <span class="nx">$2</span>
+    <span class="nx">o</span> <span class="s2">&quot;Expression --&quot;</span><span class="p">,</span>                          <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">OpNode</span> <span class="s1">&#39;--&#39;</span><span class="p">,</span> <span class="nx">$1</span><span class="p">,</span> <span class="kc">null</span><span class="p">,</span> <span class="kc">true</span>
+    <span class="nx">o</span> <span class="s2">&quot;Expression ++&quot;</span><span class="p">,</span>                          <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">OpNode</span> <span class="s1">&#39;++&#39;</span><span class="p">,</span> <span class="nx">$1</span><span class="p">,</span> <span class="kc">null</span><span class="p">,</span> <span class="kc">true</span>
+
+    <span class="nx">o</span> <span class="s2">&quot;Expression * Expression&quot;</span><span class="p">,</span>                <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">OpNode</span> <span class="s1">&#39;*&#39;</span><span class="p">,</span> <span class="nx">$1</span><span class="p">,</span> <span class="nx">$3</span>
+    <span class="nx">o</span> <span class="s2">&quot;Expression / Expression&quot;</span><span class="p">,</span>                <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">OpNode</span> <span class="s1">&#39;/&#39;</span><span class="p">,</span> <span class="nx">$1</span><span class="p">,</span> <span class="nx">$3</span>
+    <span class="nx">o</span> <span class="s2">&quot;Expression % Expression&quot;</span><span class="p">,</span>                <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">OpNode</span> <span class="s1">&#39;%&#39;</span><span class="p">,</span> <span class="nx">$1</span><span class="p">,</span> <span class="nx">$3</span>
+
+    <span class="nx">o</span> <span class="s2">&quot;Expression + Expression&quot;</span><span class="p">,</span>                <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">OpNode</span> <span class="s1">&#39;+&#39;</span><span class="p">,</span> <span class="nx">$1</span><span class="p">,</span> <span class="nx">$3</span>
+    <span class="nx">o</span> <span class="s2">&quot;Expression - Expression&quot;</span><span class="p">,</span>                <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">OpNode</span> <span class="s1">&#39;-&#39;</span><span class="p">,</span> <span class="nx">$1</span><span class="p">,</span> <span class="nx">$3</span>
+
+    <span class="nx">o</span> <span class="s2">&quot;Expression &lt;&lt; Expression&quot;</span><span class="p">,</span>               <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">OpNode</span> <span class="s1">&#39;&lt;&lt;&#39;</span><span class="p">,</span> <span class="nx">$1</span><span class="p">,</span> <span class="nx">$3</span>
+    <span class="nx">o</span> <span class="s2">&quot;Expression &gt;&gt; Expression&quot;</span><span class="p">,</span>               <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">OpNode</span> <span class="s1">&#39;&gt;&gt;&#39;</span><span class="p">,</span> <span class="nx">$1</span><span class="p">,</span> <span class="nx">$3</span>
+    <span class="nx">o</span> <span class="s2">&quot;Expression &gt;&gt;&gt; Expression&quot;</span><span class="p">,</span>              <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">OpNode</span> <span class="s1">&#39;&gt;&gt;&gt;&#39;</span><span class="p">,</span> <span class="nx">$1</span><span class="p">,</span> <span class="nx">$3</span>
+    <span class="nx">o</span> <span class="s2">&quot;Expression &amp; Expression&quot;</span><span class="p">,</span>                <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">OpNode</span> <span class="s1">&#39;&amp;&#39;</span><span class="p">,</span> <span class="nx">$1</span><span class="p">,</span> <span class="nx">$3</span>
+    <span class="nx">o</span> <span class="s2">&quot;Expression | Expression&quot;</span><span class="p">,</span>                <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">OpNode</span> <span class="s1">&#39;|&#39;</span><span class="p">,</span> <span class="nx">$1</span><span class="p">,</span> <span class="nx">$3</span>
+    <span class="nx">o</span> <span class="s2">&quot;Expression ^ Expression&quot;</span><span class="p">,</span>                <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">OpNode</span> <span class="s1">&#39;^&#39;</span><span class="p">,</span> <span class="nx">$1</span><span class="p">,</span> <span class="nx">$3</span>
+
+    <span class="nx">o</span> <span class="s2">&quot;Expression &lt;= Expression&quot;</span><span class="p">,</span>               <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">OpNode</span> <span class="s1">&#39;&lt;=&#39;</span><span class="p">,</span> <span class="nx">$1</span><span class="p">,</span> <span class="nx">$3</span>
+    <span class="nx">o</span> <span class="s2">&quot;Expression &lt; Expression&quot;</span><span class="p">,</span>                <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">OpNode</span> <span class="s1">&#39;&lt;&#39;</span><span class="p">,</span> <span class="nx">$1</span><span class="p">,</span> <span class="nx">$3</span>
+    <span class="nx">o</span> <span class="s2">&quot;Expression &gt; Expression&quot;</span><span class="p">,</span>                <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">OpNode</span> <span class="s1">&#39;&gt;&#39;</span><span class="p">,</span> <span class="nx">$1</span><span class="p">,</span> <span class="nx">$3</span>
+    <span class="nx">o</span> <span class="s2">&quot;Expression &gt;= Expression&quot;</span><span class="p">,</span>               <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">OpNode</span> <span class="s1">&#39;&gt;=&#39;</span><span class="p">,</span> <span class="nx">$1</span><span class="p">,</span> <span class="nx">$3</span>
+
+    <span class="nx">o</span> <span class="s2">&quot;Expression == Expression&quot;</span><span class="p">,</span>               <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">OpNode</span> <span class="s1">&#39;==&#39;</span><span class="p">,</span> <span class="nx">$1</span><span class="p">,</span> <span class="nx">$3</span>
+    <span class="nx">o</span> <span class="s2">&quot;Expression != Expression&quot;</span><span class="p">,</span>               <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">OpNode</span> <span class="s1">&#39;!=&#39;</span><span class="p">,</span> <span class="nx">$1</span><span class="p">,</span> <span class="nx">$3</span>
+    <span class="nx">o</span> <span class="s2">&quot;Expression IS Expression&quot;</span><span class="p">,</span>               <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">OpNode</span> <span class="s1">&#39;is&#39;</span><span class="p">,</span> <span class="nx">$1</span><span class="p">,</span> <span class="nx">$3</span>
+    <span class="nx">o</span> <span class="s2">&quot;Expression ISNT Expression&quot;</span><span class="p">,</span>             <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">OpNode</span> <span class="s1">&#39;isnt&#39;</span><span class="p">,</span> <span class="nx">$1</span><span class="p">,</span> <span class="nx">$3</span>
+
+    <span class="nx">o</span> <span class="s2">&quot;Expression &amp;&amp; Expression&quot;</span><span class="p">,</span>               <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">OpNode</span> <span class="s1">&#39;&amp;&amp;&#39;</span><span class="p">,</span> <span class="nx">$1</span><span class="p">,</span> <span class="nx">$3</span>
+    <span class="nx">o</span> <span class="s2">&quot;Expression || Expression&quot;</span><span class="p">,</span>               <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">OpNode</span> <span class="s1">&#39;||&#39;</span><span class="p">,</span> <span class="nx">$1</span><span class="p">,</span> <span class="nx">$3</span>
+    <span class="nx">o</span> <span class="s2">&quot;Expression AND Expression&quot;</span><span class="p">,</span>              <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">OpNode</span> <span class="s1">&#39;and&#39;</span><span class="p">,</span> <span class="nx">$1</span><span class="p">,</span> <span class="nx">$3</span>
+    <span class="nx">o</span> <span class="s2">&quot;Expression OR Expression&quot;</span><span class="p">,</span>               <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">OpNode</span> <span class="s1">&#39;or&#39;</span><span class="p">,</span> <span class="nx">$1</span><span class="p">,</span> <span class="nx">$3</span>
+    <span class="nx">o</span> <span class="s2">&quot;Expression ? Expression&quot;</span><span class="p">,</span>                <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">OpNode</span> <span class="s1">&#39;?&#39;</span><span class="p">,</span> <span class="nx">$1</span><span class="p">,</span> <span class="nx">$3</span>
+
+    <span class="nx">o</span> <span class="s2">&quot;Expression -= Expression&quot;</span><span class="p">,</span>               <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">OpNode</span> <span class="s1">&#39;-=&#39;</span><span class="p">,</span> <span class="nx">$1</span><span class="p">,</span> <span class="nx">$3</span>
+    <span class="nx">o</span> <span class="s2">&quot;Expression += Expression&quot;</span><span class="p">,</span>               <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">OpNode</span> <span class="s1">&#39;+=&#39;</span><span class="p">,</span> <span class="nx">$1</span><span class="p">,</span> <span class="nx">$3</span>
+    <span class="nx">o</span> <span class="s2">&quot;Expression /= Expression&quot;</span><span class="p">,</span>               <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">OpNode</span> <span class="s1">&#39;/=&#39;</span><span class="p">,</span> <span class="nx">$1</span><span class="p">,</span> <span class="nx">$3</span>
+    <span class="nx">o</span> <span class="s2">&quot;Expression *= Expression&quot;</span><span class="p">,</span>               <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">OpNode</span> <span class="s1">&#39;*=&#39;</span><span class="p">,</span> <span class="nx">$1</span><span class="p">,</span> <span class="nx">$3</span>
+    <span class="nx">o</span> <span class="s2">&quot;Expression %= Expression&quot;</span><span class="p">,</span>               <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">OpNode</span> <span class="s1">&#39;%=&#39;</span><span class="p">,</span> <span class="nx">$1</span><span class="p">,</span> <span class="nx">$3</span>
+    <span class="nx">o</span> <span class="s2">&quot;Expression ||= Expression&quot;</span><span class="p">,</span>              <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">OpNode</span> <span class="s1">&#39;||=&#39;</span><span class="p">,</span> <span class="nx">$1</span><span class="p">,</span> <span class="nx">$3</span>
+    <span class="nx">o</span> <span class="s2">&quot;Expression &amp;&amp;= Expression&quot;</span><span class="p">,</span>              <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">OpNode</span> <span class="s1">&#39;&amp;&amp;=&#39;</span><span class="p">,</span> <span class="nx">$1</span><span class="p">,</span> <span class="nx">$3</span>
+    <span class="nx">o</span> <span class="s2">&quot;Expression ?= Expression&quot;</span><span class="p">,</span>               <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">OpNode</span> <span class="s1">&#39;?=&#39;</span><span class="p">,</span> <span class="nx">$1</span><span class="p">,</span> <span class="nx">$3</span>
+
+    <span class="nx">o</span> <span class="s2">&quot;Expression INSTANCEOF Expression&quot;</span><span class="p">,</span>       <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">OpNode</span> <span class="s1">&#39;instanceof&#39;</span><span class="p">,</span> <span class="nx">$1</span><span class="p">,</span> <span class="nx">$3</span>
+    <span class="nx">o</span> <span class="s2">&quot;Expression IN Expression&quot;</span><span class="p">,</span>               <span class="o">-&gt;</span> <span class="k">new</span> <span class="nx">OpNode</span> <span class="s1">&#39;in&#39;</span><span class="p">,</span> <span class="nx">$1</span><span class="p">,</span> <span class="nx">$3</span>
+  <span class="p">]</span>
+
+<span class="p">}</span></pre></div>             </td>           </tr>                               <tr id="section-60">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-60">#</a>               </div>               <h2>Precedence</h2>             </td>             <td class="code">               <div class="highlight"><pre></pre></div>             </td>           </tr>                               <tr id="section-61">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-61">#</a>               </div>               <p>Operators at the top of this list have higher precedence than the ones lower
+down. Following these rules is what makes <code>2 + 3 * 4</code> parse as:</p>
+
+<pre><code>2 + (3 * 4)
+</code></pre>
+
+<p>And not:</p>
+
+<pre><code>(2 + 3) * 4
+</code></pre>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">operators: </span><span class="p">[</span>
+  <span class="p">[</span><span class="s2">&quot;left&quot;</span><span class="p">,</span>      <span class="s1">&#39;?&#39;</span><span class="p">]</span>
+  <span class="p">[</span><span class="s2">&quot;nonassoc&quot;</span><span class="p">,</span>  <span class="s1">&#39;UMINUS&#39;</span><span class="p">,</span> <span class="s1">&#39;UPLUS&#39;</span><span class="p">,</span> <span class="s1">&#39;NOT&#39;</span><span class="p">,</span> <span class="s1">&#39;!&#39;</span><span class="p">,</span> <span class="s1">&#39;!!&#39;</span><span class="p">,</span> <span class="s1">&#39;~&#39;</span><span class="p">,</span> <span class="s1">&#39;++&#39;</span><span class="p">,</span> <span class="s1">&#39;--&#39;</span><span class="p">]</span>
+  <span class="p">[</span><span class="s2">&quot;left&quot;</span><span class="p">,</span>      <span class="s1">&#39;*&#39;</span><span class="p">,</span> <span class="s1">&#39;/&#39;</span><span class="p">,</span> <span class="s1">&#39;%&#39;</span><span class="p">]</span>
+  <span class="p">[</span><span class="s2">&quot;left&quot;</span><span class="p">,</span>      <span class="s1">&#39;+&#39;</span><span class="p">,</span> <span class="s1">&#39;-&#39;</span><span class="p">]</span>
+  <span class="p">[</span><span class="s2">&quot;left&quot;</span><span class="p">,</span>      <span class="s1">&#39;&lt;&lt;&#39;</span><span class="p">,</span> <span class="s1">&#39;&gt;&gt;&#39;</span><span class="p">,</span> <span class="s1">&#39;&gt;&gt;&gt;&#39;</span><span class="p">]</span>
+  <span class="p">[</span><span class="s2">&quot;left&quot;</span><span class="p">,</span>      <span class="s1">&#39;&amp;&#39;</span><span class="p">,</span> <span class="s1">&#39;|&#39;</span><span class="p">,</span> <span class="s1">&#39;^&#39;</span><span class="p">]</span>
+  <span class="p">[</span><span class="s2">&quot;left&quot;</span><span class="p">,</span>      <span class="s1">&#39;&lt;=&#39;</span><span class="p">,</span> <span class="s1">&#39;&lt;&#39;</span><span class="p">,</span> <span class="s1">&#39;&gt;&#39;</span><span class="p">,</span> <span class="s1">&#39;&gt;=&#39;</span><span class="p">]</span>
+  <span class="p">[</span><span class="s2">&quot;right&quot;</span><span class="p">,</span>     <span class="s1">&#39;DELETE&#39;</span><span class="p">,</span> <span class="s1">&#39;INSTANCEOF&#39;</span><span class="p">,</span> <span class="s1">&#39;TYPEOF&#39;</span><span class="p">]</span>
+  <span class="p">[</span><span class="s2">&quot;left&quot;</span><span class="p">,</span>      <span class="s1">&#39;==&#39;</span><span class="p">,</span> <span class="s1">&#39;!=&#39;</span><span class="p">,</span> <span class="s1">&#39;IS&#39;</span><span class="p">,</span> <span class="s1">&#39;ISNT&#39;</span><span class="p">]</span>
+  <span class="p">[</span><span class="s2">&quot;left&quot;</span><span class="p">,</span>      <span class="s1">&#39;&amp;&amp;&#39;</span><span class="p">,</span> <span class="s1">&#39;||&#39;</span><span class="p">,</span> <span class="s1">&#39;AND&#39;</span><span class="p">,</span> <span class="s1">&#39;OR&#39;</span><span class="p">]</span>
+  <span class="p">[</span><span class="s2">&quot;right&quot;</span><span class="p">,</span>     <span class="s1">&#39;-=&#39;</span><span class="p">,</span> <span class="s1">&#39;+=&#39;</span><span class="p">,</span> <span class="s1">&#39;/=&#39;</span><span class="p">,</span> <span class="s1">&#39;*=&#39;</span><span class="p">,</span> <span class="s1">&#39;%=&#39;</span><span class="p">,</span> <span class="s1">&#39;||=&#39;</span><span class="p">,</span> <span class="s1">&#39;&amp;&amp;=&#39;</span><span class="p">,</span> <span class="s1">&#39;?=&#39;</span><span class="p">]</span>
+  <span class="p">[</span><span class="s2">&quot;left&quot;</span><span class="p">,</span>      <span class="s1">&#39;.&#39;</span><span class="p">]</span>
+  <span class="p">[</span><span class="s2">&quot;right&quot;</span><span class="p">,</span>     <span class="s1">&#39;INDENT&#39;</span><span class="p">]</span>
+  <span class="p">[</span><span class="s2">&quot;left&quot;</span><span class="p">,</span>      <span class="s1">&#39;OUTDENT&#39;</span><span class="p">]</span>
+  <span class="p">[</span><span class="s2">&quot;right&quot;</span><span class="p">,</span>     <span class="s1">&#39;WHEN&#39;</span><span class="p">,</span> <span class="s1">&#39;LEADING_WHEN&#39;</span><span class="p">,</span> <span class="s1">&#39;IN&#39;</span><span class="p">,</span> <span class="s1">&#39;OF&#39;</span><span class="p">,</span> <span class="s1">&#39;BY&#39;</span><span class="p">,</span> <span class="s1">&#39;THROW&#39;</span><span class="p">]</span>
+  <span class="p">[</span><span class="s2">&quot;right&quot;</span><span class="p">,</span>     <span class="s1">&#39;FOR&#39;</span><span class="p">,</span> <span class="s1">&#39;NEW&#39;</span><span class="p">,</span> <span class="s1">&#39;SUPER&#39;</span><span class="p">,</span> <span class="s1">&#39;CLASS&#39;</span><span class="p">]</span>
+  <span class="p">[</span><span class="s2">&quot;left&quot;</span><span class="p">,</span>      <span class="s1">&#39;EXTENDS&#39;</span><span class="p">]</span>
+  <span class="p">[</span><span class="s2">&quot;right&quot;</span><span class="p">,</span>     <span class="s1">&#39;ASSIGN&#39;</span><span class="p">,</span> <span class="s1">&#39;RETURN&#39;</span><span class="p">]</span>
+  <span class="p">[</span><span class="s2">&quot;right&quot;</span><span class="p">,</span>     <span class="s1">&#39;-&gt;&#39;</span><span class="p">,</span> <span class="s1">&#39;=&gt;&#39;</span><span class="p">,</span> <span class="s1">&#39;UNLESS&#39;</span><span class="p">,</span> <span class="s1">&#39;IF&#39;</span><span class="p">,</span> <span class="s1">&#39;ELSE&#39;</span><span class="p">,</span> <span class="s1">&#39;WHILE&#39;</span><span class="p">]</span>
+<span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-62">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-62">#</a>               </div>               <h2>Wrapping Up</h2>             </td>             <td class="code">               <div class="highlight"><pre></pre></div>             </td>           </tr>                               <tr id="section-63">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-63">#</a>               </div>               <p>Finally, now what we have our <strong>grammar</strong> and our <strong>operators</strong>, we can create
+our <strong>Jison.Parser</strong>. We do this by processing all of our rules, recording all
+terminals (every symbol which does not appear as the name of a rule above)
+as "tokens".</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">tokens: </span><span class="p">[]</span>
+<span class="k">for</span> <span class="nx">name</span><span class="p">,</span> <span class="nx">alternatives</span> <span class="k">of</span> <span class="nx">grammar</span>
+  <span class="nx">grammar</span><span class="p">[</span><span class="nx">name</span><span class="p">]</span><span class="o">:</span> <span class="k">for</span> <span class="nx">alt</span> <span class="k">in</span> <span class="nx">alternatives</span>
+    <span class="k">for</span> <span class="nx">token</span> <span class="k">in</span> <span class="nx">alt</span><span class="p">[</span><span class="mi">0</span><span class="p">].</span><span class="nx">split</span> <span class="s1">&#39; &#39;</span>
+      <span class="nx">tokens</span><span class="p">.</span><span class="nx">push</span> <span class="nx">token</span> <span class="nx">unless</span> <span class="nx">grammar</span><span class="p">[</span><span class="nx">token</span><span class="p">]</span>
+    <span class="nx">alt</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span> <span class="o">=</span> <span class="s2">&quot;return ${alt[1]}&quot;</span> <span class="k">if</span> <span class="nx">name</span> <span class="o">is</span> <span class="s1">&#39;Root&#39;</span>
+    <span class="nx">alt</span></pre></div>             </td>           </tr>                               <tr id="section-64">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-64">#</a>               </div>               <p>Initialize the <strong>Parser</strong> with our list of terminal <strong>tokens</strong>, our <strong>grammar</strong>
+rules, and the name of the root. Reverse the operators because Jison orders
+precedence from low to high, and we have it high to low
+(as in <a href="http://dinosaur.compilertools.net/yacc/index.html">Yacc</a>).</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">exports.parser: </span><span class="k">new</span> <span class="nx">Parser</span> <span class="p">{</span>
+  <span class="nv">tokens: </span>      <span class="nx">tokens</span><span class="p">.</span><span class="nx">join</span> <span class="s1">&#39; &#39;</span>
+  <span class="nv">bnf: </span>         <span class="nx">grammar</span>
+  <span class="nv">operators: </span>   <span class="nx">operators</span><span class="p">.</span><span class="nx">reverse</span><span class="p">()</span>
+  <span class="nv">startSymbol: </span> <span class="s1">&#39;Root&#39;</span>
+<span class="p">}</span>
+
+</pre></div>             </td>           </tr>                </tbody>     </table>   </div> </body> </html> 

documentation/docs/lexer.html

@@ -0,0 +1,359 @@
+<!DOCTYPE html>  <html> <head>   <title>lexer.coffee</title>   <meta http-equiv="content-type" content="text/html; charset=UTF-8">   <link rel="stylesheet" media="all" href="docco.css" /> </head> <body>   <div id="container">     <div id="background"></div>            <div id="jump_to">         Jump To &hellip;         <div id="jump_wrapper">           <div id="jump_page">                                           <a class="source" href="cake.html">                 cake.coffee               </a>                                           <a class="source" href="coffee-script.html">                 coffee-script.coffee               </a>                                           <a class="source" href="command.html">                 command.coffee               </a>                                           <a class="source" href="grammar.html">                 grammar.coffee               </a>                                           <a class="source" href="lexer.html">                 lexer.coffee               </a>                                           <a class="source" href="nodes.html">                 nodes.coffee               </a>                                           <a class="source" href="optparse.html">                 optparse.coffee               </a>                                           <a class="source" href="repl.html">                 repl.coffee               </a>                                           <a class="source" href="rewriter.html">                 rewriter.coffee               </a>                                           <a class="source" href="scope.html">                 scope.coffee               </a>                        </div>         </div>       </div>          <table cellpadding="0" cellspacing="0">       <thead>         <tr>           <th class="docs">             <h1>               lexer.coffee             </h1>           </th>           <th class="code">           </th>         </tr>       </thead>       <tbody>                               <tr id="section-1">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-1">#</a>               </div>               <p>The CoffeeScript Lexer. Uses a series of token-matching regexes to attempt
+matches against the beginning of the source code. When a match is found,
+a token is produced, we consume the match, and start again. Tokens are in the
+form:</p>
+
+<pre><code>[tag, value, line_number]
+</code></pre>
+
+<p>Which is a format that can be fed directly into <a href="http://github.com/zaach/jison">Jison</a>.</p>             </td>             <td class="code">               <div class="highlight"><pre></pre></div>             </td>           </tr>                               <tr id="section-2">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-2">#</a>               </div>               <p>Set up the Lexer for both Node.js and the browser, depending on where we are.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="k">if</span> <span class="nx">process</span><span class="o">?</span>
+  <span class="nv">Rewriter: </span><span class="nx">require</span><span class="p">(</span><span class="s1">&#39;./rewriter&#39;</span><span class="p">).</span><span class="nx">Rewriter</span>
+<span class="k">else</span>
+  <span class="k">this</span><span class="p">.</span><span class="nv">exports: </span><span class="k">this</span>
+  <span class="nv">Rewriter: </span><span class="k">this</span><span class="p">.</span><span class="nx">Rewriter</span></pre></div>             </td>           </tr>                               <tr id="section-3">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-3">#</a>               </div>               <h2>The Lexer Class</h2>             </td>             <td class="code">               <div class="highlight"><pre></pre></div>             </td>           </tr>                               <tr id="section-4">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-4">#</a>               </div>               <p>The Lexer class reads a stream of CoffeeScript and divvys it up into tagged
+tokens. Some potential ambiguity in the grammar has been avoided by
+pushing some extra smarts into the Lexer.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">exports.Lexer: </span><span class="nx">class</span> <span class="nx">Lexer</span></pre></div>             </td>           </tr>                               <tr id="section-5">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-5">#</a>               </div>               <p><strong>tokenize</strong> is the Lexer's main method. Scan by attempting to match tokens
+one at a time, using a regular expression anchored at the start of the
+remaining code, or a custom recursive token-matching method
+(for interpolations). When the next token has been recorded, we move forward
+within the code past the token, and begin again.</p>
+
+<p>Each tokenizing method is responsible for incrementing <code>@i</code> by the number of
+characters it has consumed. <code>@i</code> can be thought of as our finger on the page
+of source.</p>
+
+<p>Before returning the token stream, run it through the <a href="rewriter.html">Rewriter</a>
+unless explicitly asked not to.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">tokenize: </span><span class="p">(</span><span class="nx">code</span><span class="p">,</span> <span class="nx">options</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="nx">o</span>        <span class="o">:</span> <span class="nx">options</span> <span class="o">or</span> <span class="p">{}</span>
+    <span class="err">@</span><span class="nx">code</span>    <span class="o">:</span> <span class="nx">code</span>         <span class="c1"># The remainder of the source code.</span>
+    <span class="err">@</span><span class="nx">i</span>       <span class="o">:</span> <span class="mi">0</span>            <span class="c1"># Current character position we&#39;re parsing.</span>
+    <span class="err">@</span><span class="nx">line</span>    <span class="o">:</span> <span class="nx">o</span><span class="p">.</span><span class="nx">line</span> <span class="o">or</span> <span class="mi">0</span>  <span class="c1"># The current line.</span>
+    <span class="err">@</span><span class="nx">indent</span>  <span class="o">:</span> <span class="mi">0</span>            <span class="c1"># The current indentation level.</span>
+    <span class="err">@</span><span class="nx">indents</span> <span class="o">:</span> <span class="p">[]</span>           <span class="c1"># The stack of all current indentation levels.</span>
+    <span class="err">@</span><span class="nx">tokens</span>  <span class="o">:</span> <span class="p">[]</span>           <span class="c1"># Stream of parsed tokens in the form [&#39;TYPE&#39;, value, line]</span>
+    <span class="k">while</span> <span class="err">@</span><span class="nx">i</span> <span class="o">&lt;</span> <span class="err">@</span><span class="nx">code</span><span class="p">.</span><span class="nx">length</span>
+      <span class="err">@</span><span class="nv">chunk: </span><span class="err">@</span><span class="nx">code</span><span class="p">.</span><span class="nx">slice</span><span class="p">(</span><span class="err">@</span><span class="nx">i</span><span class="p">)</span>
+      <span class="err">@</span><span class="nx">extract_next_token</span><span class="p">()</span>
+    <span class="err">@</span><span class="nx">close_indentation</span><span class="p">()</span>
+    <span class="k">return</span> <span class="err">@</span><span class="nx">tokens</span> <span class="k">if</span> <span class="nx">o</span><span class="p">.</span><span class="nx">rewrite</span> <span class="o">is</span> <span class="kc">off</span>
+    <span class="p">(</span><span class="k">new</span> <span class="nx">Rewriter</span><span class="p">()).</span><span class="nx">rewrite</span> <span class="err">@</span><span class="nx">tokens</span></pre></div>             </td>           </tr>                               <tr id="section-6">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-6">#</a>               </div>               <p>At every position, run through this list of attempted matches,
+short-circuiting if any of them succeed. Their order determines precedence:
+<code>@literal_token</code> is the fallback catch-all.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">extract_next_token: </span><span class="o">-&gt;</span>
+    <span class="k">return</span> <span class="k">if</span> <span class="err">@</span><span class="nx">identifier_token</span><span class="p">()</span>
+    <span class="k">return</span> <span class="k">if</span> <span class="err">@</span><span class="nx">number_token</span><span class="p">()</span>
+    <span class="k">return</span> <span class="k">if</span> <span class="err">@</span><span class="nx">heredoc_token</span><span class="p">()</span>
+    <span class="k">return</span> <span class="k">if</span> <span class="err">@</span><span class="nx">regex_token</span><span class="p">()</span>
+    <span class="k">return</span> <span class="k">if</span> <span class="err">@</span><span class="nx">comment_token</span><span class="p">()</span>
+    <span class="k">return</span> <span class="k">if</span> <span class="err">@</span><span class="nx">line_token</span><span class="p">()</span>
+    <span class="k">return</span> <span class="k">if</span> <span class="err">@</span><span class="nx">whitespace_token</span><span class="p">()</span>
+    <span class="k">return</span> <span class="k">if</span> <span class="err">@</span><span class="nx">js_token</span><span class="p">()</span>
+    <span class="k">return</span> <span class="k">if</span> <span class="err">@</span><span class="nx">string_token</span><span class="p">()</span>
+    <span class="k">return</span>    <span class="err">@</span><span class="nx">literal_token</span><span class="p">()</span></pre></div>             </td>           </tr>                               <tr id="section-7">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-7">#</a>               </div>               <h2>Tokenizers</h2>             </td>             <td class="code">               <div class="highlight"><pre></pre></div>             </td>           </tr>                               <tr id="section-8">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-8">#</a>               </div>               <p>Matches identifying literals: variables, keywords, method names, etc.
+Check to ensure that JavaScript reserved words aren't being used as
+identifiers. Because CoffeeScript reserves a handful of keywords that are
+allowed in JavaScript, we're careful not to tag them as keywords when
+referenced as property names here, so you can still do <code>jQuery.is()</code> even
+though <code>is</code> means <code>===</code> otherwise.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">identifier_token: </span><span class="o">-&gt;</span>
+    <span class="k">return</span> <span class="kc">false</span> <span class="nx">unless</span> <span class="nv">id: </span><span class="err">@</span><span class="nx">match</span> <span class="nx">IDENTIFIER</span><span class="p">,</span> <span class="mi">1</span>
+    <span class="err">@</span><span class="nx">name_access_type</span><span class="p">()</span>
+    <span class="nv">tag: </span><span class="s1">&#39;IDENTIFIER&#39;</span>
+    <span class="nv">tag: </span><span class="nx">id</span><span class="p">.</span><span class="nx">toUpperCase</span><span class="p">()</span> <span class="k">if</span> <span class="nx">include</span><span class="p">(</span><span class="nx">KEYWORDS</span><span class="p">,</span> <span class="nx">id</span><span class="p">)</span> <span class="o">and</span>
+      <span class="o">not</span> <span class="p">(</span><span class="nx">include</span><span class="p">(</span><span class="nx">ACCESSORS</span><span class="p">,</span> <span class="err">@</span><span class="nx">tag</span><span class="p">(</span><span class="mi">0</span><span class="p">))</span> <span class="o">and</span> <span class="o">not</span> <span class="err">@</span><span class="nx">prev</span><span class="p">().</span><span class="nx">spaced</span><span class="p">)</span>
+    <span class="err">@</span><span class="nx">identifier_error</span> <span class="nx">id</span>  <span class="k">if</span> <span class="nx">include</span> <span class="nx">RESERVED</span><span class="p">,</span> <span class="nx">id</span>
+    <span class="nv">tag: </span><span class="s1">&#39;LEADING_WHEN&#39;</span>   <span class="k">if</span> <span class="nx">tag</span> <span class="o">is</span> <span class="s1">&#39;WHEN&#39;</span> <span class="o">and</span> <span class="nx">include</span> <span class="nx">BEFORE_WHEN</span><span class="p">,</span> <span class="err">@</span><span class="nx">tag</span><span class="p">()</span>
+    <span class="err">@</span><span class="nx">token</span><span class="p">(</span><span class="nx">tag</span><span class="p">,</span> <span class="nx">id</span><span class="p">)</span>
+    <span class="err">@</span><span class="nx">i</span> <span class="o">+=</span> <span class="nx">id</span><span class="p">.</span><span class="nx">length</span>
+    <span class="kc">true</span></pre></div>             </td>           </tr>                               <tr id="section-9">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-9">#</a>               </div>               <p>Matches numbers, including decimals, hex, and exponential notation.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">number_token: </span><span class="o">-&gt;</span>
+    <span class="k">return</span> <span class="kc">false</span> <span class="nx">unless</span> <span class="nv">number: </span><span class="err">@</span><span class="nx">match</span> <span class="nx">NUMBER</span><span class="p">,</span> <span class="mi">1</span>
+    <span class="err">@</span><span class="nx">token</span> <span class="s1">&#39;NUMBER&#39;</span><span class="p">,</span> <span class="nx">number</span>
+    <span class="err">@</span><span class="nx">i</span> <span class="o">+=</span> <span class="nx">number</span><span class="p">.</span><span class="nx">length</span>
+    <span class="kc">true</span></pre></div>             </td>           </tr>                               <tr id="section-10">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-10">#</a>               </div>               <p>Matches strings, including multi-line strings. Ensures that quotation marks
+are balanced within the string's contents, and within nested interpolations.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">string_token: </span><span class="o">-&gt;</span>
+    <span class="k">return</span> <span class="kc">false</span> <span class="nx">unless</span> <span class="nx">starts</span><span class="p">(</span><span class="err">@</span><span class="nx">chunk</span><span class="p">,</span> <span class="s1">&#39;&quot;&#39;</span><span class="p">)</span> <span class="o">or</span> <span class="nx">starts</span><span class="p">(</span><span class="err">@</span><span class="nx">chunk</span><span class="p">,</span> <span class="s2">&quot;&#39;&quot;</span><span class="p">)</span>
+    <span class="nv">string: </span><span class="err">@</span><span class="nx">balanced_token</span> <span class="p">[</span><span class="s1">&#39;&quot;&#39;</span><span class="p">,</span> <span class="s1">&#39;&quot;&#39;</span><span class="p">],</span> <span class="p">[</span><span class="s1">&#39;${&#39;</span><span class="p">,</span> <span class="s1">&#39;}&#39;</span><span class="p">]</span>
+    <span class="nv">string: </span><span class="err">@</span><span class="nx">balanced_token</span> <span class="p">[</span><span class="s2">&quot;&#39;&quot;</span><span class="p">,</span> <span class="s2">&quot;&#39;&quot;</span><span class="p">]</span> <span class="nx">unless</span> <span class="nx">string</span>
+    <span class="k">return</span> <span class="kc">false</span> <span class="nx">unless</span> <span class="nx">string</span>
+    <span class="err">@</span><span class="nx">interpolate_string</span> <span class="nx">string</span><span class="p">.</span><span class="nx">replace</span> <span class="nx">STRING_NEWLINES</span><span class="p">,</span> <span class="s2">&quot; \\\n&quot;</span>
+    <span class="err">@</span><span class="nx">line</span> <span class="o">+=</span> <span class="nx">count</span> <span class="nx">string</span><span class="p">,</span> <span class="s2">&quot;\n&quot;</span>
+    <span class="err">@</span><span class="nx">i</span> <span class="o">+=</span> <span class="nx">string</span><span class="p">.</span><span class="nx">length</span>
+    <span class="kc">true</span></pre></div>             </td>           </tr>                               <tr id="section-11">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-11">#</a>               </div>               <p>Matches heredocs, adjusting indentation to the correct level, as heredocs
+preserve whitespace, but ignore indentation to the left.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">heredoc_token: </span><span class="o">-&gt;</span>
+    <span class="k">return</span> <span class="kc">false</span> <span class="nx">unless</span> <span class="nx">match</span> <span class="o">=</span> <span class="err">@</span><span class="nx">chunk</span><span class="p">.</span><span class="nx">match</span><span class="p">(</span><span class="nx">HEREDOC</span><span class="p">)</span>
+    <span class="nv">doc: </span><span class="err">@</span><span class="nx">sanitize_heredoc</span> <span class="nx">match</span><span class="p">[</span><span class="mi">2</span><span class="p">]</span> <span class="o">or</span> <span class="nx">match</span><span class="p">[</span><span class="mi">4</span><span class="p">]</span>
+    <span class="err">@</span><span class="nx">token</span> <span class="s1">&#39;STRING&#39;</span><span class="p">,</span> <span class="s2">&quot;\&quot;$doc\&quot;&quot;</span>
+    <span class="err">@</span><span class="nx">line</span> <span class="o">+=</span> <span class="nx">count</span> <span class="nx">match</span><span class="p">[</span><span class="mi">1</span><span class="p">],</span> <span class="s2">&quot;\n&quot;</span>
+    <span class="err">@</span><span class="nx">i</span> <span class="o">+=</span> <span class="nx">match</span><span class="p">[</span><span class="mi">1</span><span class="p">].</span><span class="nx">length</span>
+    <span class="kc">true</span></pre></div>             </td>           </tr>                               <tr id="section-12">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-12">#</a>               </div>               <p>Matches JavaScript interpolated directly into the source via backticks.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">js_token: </span><span class="o">-&gt;</span>
+    <span class="k">return</span> <span class="kc">false</span> <span class="nx">unless</span> <span class="nx">starts</span> <span class="err">@</span><span class="nx">chunk</span><span class="p">,</span> <span class="s1">&#39;`&#39;</span>
+    <span class="k">return</span> <span class="kc">false</span> <span class="nx">unless</span> <span class="nv">script: </span><span class="err">@</span><span class="nx">balanced_token</span> <span class="p">[</span><span class="s1">&#39;`&#39;</span><span class="p">,</span> <span class="s1">&#39;`&#39;</span><span class="p">]</span>
+    <span class="err">@</span><span class="nx">token</span> <span class="s1">&#39;JS&#39;</span><span class="p">,</span> <span class="nx">script</span><span class="p">.</span><span class="nx">replace</span><span class="p">(</span><span class="nx">JS_CLEANER</span><span class="p">,</span> <span class="s1">&#39;&#39;</span><span class="p">)</span>
+    <span class="err">@</span><span class="nx">i</span> <span class="o">+=</span> <span class="nx">script</span><span class="p">.</span><span class="nx">length</span>
+    <span class="kc">true</span></pre></div>             </td>           </tr>                               <tr id="section-13">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-13">#</a>               </div>               <p>Matches regular expression literals. Lexing regular expressions is difficult
+to distinguish from division, so we borrow some basic heuristics from
+JavaScript and Ruby.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">regex_token: </span><span class="o">-&gt;</span>
+    <span class="k">return</span> <span class="kc">false</span> <span class="nx">unless</span> <span class="nv">regex: </span><span class="err">@</span><span class="nx">match</span> <span class="nx">REGEX</span><span class="p">,</span> <span class="mi">1</span>
+    <span class="k">return</span> <span class="kc">false</span> <span class="k">if</span> <span class="nx">include</span> <span class="nx">NOT_REGEX</span><span class="p">,</span> <span class="err">@</span><span class="nx">tag</span><span class="p">()</span>
+    <span class="err">@</span><span class="nx">token</span> <span class="s1">&#39;REGEX&#39;</span><span class="p">,</span> <span class="nx">regex</span>
+    <span class="err">@</span><span class="nx">i</span> <span class="o">+=</span> <span class="nx">regex</span><span class="p">.</span><span class="nx">length</span>
+    <span class="kc">true</span></pre></div>             </td>           </tr>                               <tr id="section-14">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-14">#</a>               </div>               <p>Matches a token in which which the passed delimiter pairs must be correctly
+balanced (ie. strings, JS literals).</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">balanced_token: </span><span class="p">(</span><span class="nx">delimited</span><span class="p">...)</span> <span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nx">balanced_string</span> <span class="err">@</span><span class="nx">chunk</span><span class="p">,</span> <span class="nx">delimited</span><span class="p">...</span></pre></div>             </td>           </tr>                               <tr id="section-15">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-15">#</a>               </div>               <p>Matches and conumes comments. We pass through comments into JavaScript,
+so they're treated as real tokens, like any other part of the language.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">comment_token: </span><span class="o">-&gt;</span>
+    <span class="k">return</span> <span class="kc">false</span> <span class="nx">unless</span> <span class="nv">comment: </span><span class="err">@</span><span class="nx">match</span> <span class="nx">COMMENT</span><span class="p">,</span> <span class="mi">1</span>
+    <span class="err">@</span><span class="nx">line</span> <span class="o">+=</span> <span class="p">(</span><span class="nx">comment</span><span class="p">.</span><span class="nx">match</span><span class="p">(</span><span class="nx">MULTILINER</span><span class="p">)</span> <span class="o">or</span> <span class="p">[]).</span><span class="nx">length</span>
+    <span class="nv">lines: </span><span class="nx">comment</span><span class="p">.</span><span class="nx">replace</span><span class="p">(</span><span class="nx">COMMENT_CLEANER</span><span class="p">,</span> <span class="s1">&#39;&#39;</span><span class="p">).</span><span class="nx">split</span><span class="p">(</span><span class="nx">MULTILINER</span><span class="p">)</span>
+    <span class="err">@</span><span class="nx">token</span> <span class="s1">&#39;COMMENT&#39;</span><span class="p">,</span> <span class="nx">compact</span> <span class="nx">lines</span>
+    <span class="err">@</span><span class="nx">token</span> <span class="s1">&#39;TERMINATOR&#39;</span><span class="p">,</span> <span class="s2">&quot;\n&quot;</span>
+    <span class="err">@</span><span class="nx">i</span> <span class="o">+=</span> <span class="nx">comment</span><span class="p">.</span><span class="nx">length</span>
+    <span class="kc">true</span></pre></div>             </td>           </tr>                               <tr id="section-16">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-16">#</a>               </div>               <p>Matches newlines, indents, and outdents, and determines which is which.
+If we can detect that the current line is continued onto the the next line,
+then the newline is suppressed:</p>
+
+<pre><code>elements
+  .each( ... )
+  .map( ... )
+</code></pre>
+
+<p>Keeps track of the level of indentation, because a single outdent token
+can close multiple indents, so we need to know how far in we happen to be.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">line_token: </span><span class="o">-&gt;</span>
+    <span class="k">return</span> <span class="kc">false</span> <span class="nx">unless</span> <span class="nv">indent: </span><span class="err">@</span><span class="nx">match</span> <span class="nx">MULTI_DENT</span><span class="p">,</span> <span class="mi">1</span>
+    <span class="err">@</span><span class="nx">line</span> <span class="o">+=</span> <span class="nx">indent</span><span class="p">.</span><span class="nx">match</span><span class="p">(</span><span class="nx">MULTILINER</span><span class="p">).</span><span class="nx">length</span>
+    <span class="err">@</span><span class="nx">i</span>    <span class="o">+=</span> <span class="nx">indent</span><span class="p">.</span><span class="nx">length</span>
+    <span class="nv">prev: </span><span class="err">@</span><span class="nx">prev</span><span class="p">(</span><span class="mi">2</span><span class="p">)</span>
+    <span class="nv">size: </span><span class="nx">indent</span><span class="p">.</span><span class="nx">match</span><span class="p">(</span><span class="nx">LAST_DENTS</span><span class="p">).</span><span class="nx">reverse</span><span class="p">()[</span><span class="mi">0</span><span class="p">].</span><span class="nx">match</span><span class="p">(</span><span class="nx">LAST_DENT</span><span class="p">)[</span><span class="mi">1</span><span class="p">].</span><span class="nx">length</span>
+    <span class="nv">next_character: </span><span class="err">@</span><span class="nx">chunk</span><span class="p">.</span><span class="nx">match</span><span class="p">(</span><span class="nx">MULTI_DENT</span><span class="p">)[</span><span class="mi">4</span><span class="p">]</span>
+    <span class="nv">no_newlines: </span><span class="nx">next_character</span> <span class="o">is</span> <span class="s1">&#39;.&#39;</span> <span class="o">or</span> <span class="p">(</span><span class="err">@</span><span class="nx">value</span><span class="p">()</span> <span class="o">and</span> <span class="err">@</span><span class="nx">value</span><span class="p">().</span><span class="nx">match</span><span class="p">(</span><span class="nx">NO_NEWLINE</span><span class="p">)</span> <span class="o">and</span>
+      <span class="nx">prev</span> <span class="o">and</span> <span class="p">(</span><span class="nx">prev</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">isnt</span> <span class="s1">&#39;.&#39;</span><span class="p">)</span> <span class="o">and</span> <span class="o">not</span> <span class="err">@</span><span class="nx">value</span><span class="p">().</span><span class="nx">match</span><span class="p">(</span><span class="nx">CODE</span><span class="p">))</span>
+    <span class="k">if</span> <span class="nx">size</span> <span class="o">is</span> <span class="err">@</span><span class="nx">indent</span>
+      <span class="k">return</span> <span class="err">@</span><span class="nx">suppress_newlines</span><span class="p">()</span> <span class="k">if</span> <span class="nx">no_newlines</span>
+      <span class="k">return</span> <span class="err">@</span><span class="nx">newline_token</span><span class="p">(</span><span class="nx">indent</span><span class="p">)</span>
+    <span class="k">else</span> <span class="k">if</span> <span class="nx">size</span> <span class="o">&gt;</span> <span class="err">@</span><span class="nx">indent</span>
+      <span class="k">return</span> <span class="err">@</span><span class="nx">suppress_newlines</span><span class="p">()</span> <span class="k">if</span> <span class="nx">no_newlines</span>
+      <span class="nv">diff: </span><span class="nx">size</span> <span class="o">-</span> <span class="err">@</span><span class="nx">indent</span>
+      <span class="err">@</span><span class="nx">token</span> <span class="s1">&#39;INDENT&#39;</span><span class="p">,</span> <span class="nx">diff</span>
+      <span class="err">@</span><span class="nx">indents</span><span class="p">.</span><span class="nx">push</span> <span class="nx">diff</span>
+    <span class="k">else</span>
+      <span class="err">@</span><span class="nx">outdent_token</span> <span class="err">@</span><span class="nx">indent</span> <span class="o">-</span> <span class="nx">size</span><span class="p">,</span> <span class="nx">no_newlines</span>
+    <span class="err">@</span><span class="nv">indent: </span><span class="nx">size</span>
+    <span class="kc">true</span></pre></div>             </td>           </tr>                               <tr id="section-17">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-17">#</a>               </div>               <p>Record an outdent token or multiple tokens, if we happen to be moving back
+inwards past several recorded indents.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">outdent_token: </span><span class="p">(</span><span class="nx">move_out</span><span class="p">,</span> <span class="nx">no_newlines</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="k">while</span> <span class="nx">move_out</span> <span class="o">&gt;</span> <span class="mi">0</span> <span class="o">and</span> <span class="err">@</span><span class="nx">indents</span><span class="p">.</span><span class="nx">length</span>
+      <span class="nv">last_indent: </span><span class="err">@</span><span class="nx">indents</span><span class="p">.</span><span class="nx">pop</span><span class="p">()</span>
+      <span class="err">@</span><span class="nx">token</span> <span class="s1">&#39;OUTDENT&#39;</span><span class="p">,</span> <span class="nx">last_indent</span>
+      <span class="nx">move_out</span> <span class="o">-=</span> <span class="nx">last_indent</span>
+    <span class="err">@</span><span class="nx">token</span> <span class="s1">&#39;TERMINATOR&#39;</span><span class="p">,</span> <span class="s2">&quot;\n&quot;</span> <span class="nx">unless</span> <span class="err">@</span><span class="nx">tag</span><span class="p">()</span> <span class="o">is</span> <span class="s1">&#39;TERMINATOR&#39;</span> <span class="o">or</span> <span class="nx">no_newlines</span>
+    <span class="kc">true</span></pre></div>             </td>           </tr>                               <tr id="section-18">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-18">#</a>               </div>               <p>Matches and consumes non-meaningful whitespace. Tag the previous token
+as being "spaced", because there are some cases where it makes a difference.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">whitespace_token: </span><span class="o">-&gt;</span>
+    <span class="k">return</span> <span class="kc">false</span> <span class="nx">unless</span> <span class="nv">space: </span><span class="err">@</span><span class="nx">match</span> <span class="nx">WHITESPACE</span><span class="p">,</span> <span class="mi">1</span>
+    <span class="nv">prev: </span><span class="err">@</span><span class="nx">prev</span><span class="p">()</span>
+    <span class="nv">prev.spaced: </span><span class="kc">true</span> <span class="k">if</span> <span class="nx">prev</span>
+    <span class="err">@</span><span class="nx">i</span> <span class="o">+=</span> <span class="nx">space</span><span class="p">.</span><span class="nx">length</span>
+    <span class="kc">true</span></pre></div>             </td>           </tr>                               <tr id="section-19">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-19">#</a>               </div>               <p>Generate a newline token. Consecutive newlines get merged together.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">newline_token: </span><span class="p">(</span><span class="nx">newlines</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nx">token</span> <span class="s1">&#39;TERMINATOR&#39;</span><span class="p">,</span> <span class="s2">&quot;\n&quot;</span> <span class="nx">unless</span> <span class="err">@</span><span class="nx">tag</span><span class="p">()</span> <span class="o">is</span> <span class="s1">&#39;TERMINATOR&#39;</span>
+    <span class="kc">true</span></pre></div>             </td>           </tr>                               <tr id="section-20">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-20">#</a>               </div>               <p>Use a <code>\</code> at a line-ending to suppress the newline.
+The slash is removed here once its job is done.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">suppress_newlines: </span><span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nx">tokens</span><span class="p">.</span><span class="nx">pop</span><span class="p">()</span> <span class="k">if</span> <span class="err">@</span><span class="nx">value</span><span class="p">()</span> <span class="o">is</span> <span class="s2">&quot;\\&quot;</span>
+    <span class="kc">true</span></pre></div>             </td>           </tr>                               <tr id="section-21">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-21">#</a>               </div>               <p>We treat all other single characters as a token. Eg.: <code>( ) , . !</code>
+Multi-character operators are also literal tokens, so that Jison can assign
+the proper order of operations. There are some symbols that we tag specially
+here. <code>;</code> and newlines are both treated as a <code>TERMINATOR</code>, we distinguish
+parentheses that indicate a method call from regular parentheses, and so on.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">literal_token: </span><span class="o">-&gt;</span>
+    <span class="nv">match: </span><span class="err">@</span><span class="nx">chunk</span><span class="p">.</span><span class="nx">match</span><span class="p">(</span><span class="nx">OPERATOR</span><span class="p">)</span>
+    <span class="nv">value: </span><span class="nx">match</span> <span class="o">and</span> <span class="nx">match</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span>
+    <span class="err">@</span><span class="nx">tag_parameters</span><span class="p">()</span> <span class="k">if</span> <span class="nx">value</span> <span class="o">and</span> <span class="nx">value</span><span class="p">.</span><span class="nx">match</span><span class="p">(</span><span class="nx">CODE</span><span class="p">)</span>
+    <span class="nx">value</span> <span class="o">||=</span> <span class="err">@</span><span class="nx">chunk</span><span class="p">.</span><span class="nx">substr</span><span class="p">(</span><span class="mi">0</span><span class="p">,</span> <span class="mi">1</span><span class="p">)</span>
+    <span class="nv">not_spaced: </span><span class="o">not</span> <span class="err">@</span><span class="nx">prev</span><span class="p">()</span> <span class="o">or</span> <span class="o">not</span> <span class="err">@</span><span class="nx">prev</span><span class="p">().</span><span class="nx">spaced</span>
+    <span class="nv">tag: </span><span class="nx">value</span>
+    <span class="k">if</span> <span class="nx">value</span><span class="p">.</span><span class="nx">match</span><span class="p">(</span><span class="nx">ASSIGNMENT</span><span class="p">)</span>
+      <span class="nv">tag: </span><span class="s1">&#39;ASSIGN&#39;</span>
+      <span class="err">@</span><span class="nx">assignment_error</span><span class="p">()</span> <span class="k">if</span> <span class="nx">include</span> <span class="nx">JS_FORBIDDEN</span><span class="p">,</span> <span class="err">@</span><span class="nx">value</span>
+    <span class="k">else</span> <span class="k">if</span> <span class="nx">value</span> <span class="o">is</span> <span class="s1">&#39;;&#39;</span>
+      <span class="nv">tag: </span><span class="s1">&#39;TERMINATOR&#39;</span>
+    <span class="k">else</span> <span class="k">if</span> <span class="nx">value</span> <span class="o">is</span> <span class="s1">&#39;[&#39;</span> <span class="o">and</span> <span class="err">@</span><span class="nx">tag</span><span class="p">()</span> <span class="o">is</span> <span class="s1">&#39;?&#39;</span> <span class="o">and</span> <span class="nx">not_spaced</span>
+      <span class="nv">tag: </span><span class="s1">&#39;SOAKED_INDEX_START&#39;</span>
+      <span class="err">@</span><span class="nv">soaked_index: </span><span class="kc">true</span>
+      <span class="err">@</span><span class="nx">tokens</span><span class="p">.</span><span class="nx">pop</span><span class="p">()</span>
+    <span class="k">else</span> <span class="k">if</span> <span class="nx">value</span> <span class="o">is</span> <span class="s1">&#39;]&#39;</span> <span class="o">and</span> <span class="err">@</span><span class="nx">soaked_index</span>
+      <span class="nv">tag: </span><span class="s1">&#39;SOAKED_INDEX_END&#39;</span>
+      <span class="err">@</span><span class="nv">soaked_index: </span><span class="kc">false</span>
+    <span class="k">else</span> <span class="k">if</span> <span class="nx">include</span><span class="p">(</span><span class="nx">CALLABLE</span><span class="p">,</span> <span class="err">@</span><span class="nx">tag</span><span class="p">())</span> <span class="o">and</span> <span class="nx">not_spaced</span>
+      <span class="nv">tag: </span><span class="s1">&#39;CALL_START&#39;</span>  <span class="k">if</span> <span class="nx">value</span> <span class="o">is</span> <span class="s1">&#39;(&#39;</span>
+      <span class="nv">tag: </span><span class="s1">&#39;INDEX_START&#39;</span> <span class="k">if</span> <span class="nx">value</span> <span class="o">is</span> <span class="s1">&#39;[&#39;</span>
+    <span class="err">@</span><span class="nx">token</span> <span class="nx">tag</span><span class="p">,</span> <span class="nx">value</span>
+    <span class="err">@</span><span class="nx">i</span> <span class="o">+=</span> <span class="nx">value</span><span class="p">.</span><span class="nx">length</span>
+    <span class="kc">true</span></pre></div>             </td>           </tr>                               <tr id="section-22">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-22">#</a>               </div>               <h2>Token Manipulators</h2>             </td>             <td class="code">               <div class="highlight"><pre></pre></div>             </td>           </tr>                               <tr id="section-23">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-23">#</a>               </div>               <p>As we consume a new <code>IDENTIFIER</code>, look at the previous token to determine
+if it's a special kind of accessor.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">name_access_type: </span><span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nx">tag</span><span class="p">(</span><span class="mi">1</span><span class="p">,</span> <span class="s1">&#39;PROTOTYPE_ACCESS&#39;</span><span class="p">)</span> <span class="k">if</span> <span class="err">@</span><span class="nx">value</span><span class="p">()</span> <span class="o">is</span> <span class="s1">&#39;::&#39;</span>
+    <span class="k">if</span> <span class="err">@</span><span class="nx">value</span><span class="p">()</span> <span class="o">is</span> <span class="s1">&#39;.&#39;</span> <span class="o">and</span> <span class="o">not</span> <span class="p">(</span><span class="err">@</span><span class="nx">value</span><span class="p">(</span><span class="mi">2</span><span class="p">)</span> <span class="o">is</span> <span class="s1">&#39;.&#39;</span><span class="p">)</span>
+      <span class="k">if</span> <span class="err">@</span><span class="nx">tag</span><span class="p">(</span><span class="mi">2</span><span class="p">)</span> <span class="o">is</span> <span class="s1">&#39;?&#39;</span>
+        <span class="err">@</span><span class="nx">tag</span><span class="p">(</span><span class="mi">1</span><span class="p">,</span> <span class="s1">&#39;SOAK_ACCESS&#39;</span><span class="p">)</span>
+        <span class="err">@</span><span class="nx">tokens</span><span class="p">.</span><span class="nx">splice</span><span class="p">(</span><span class="o">-</span><span class="mi">2</span><span class="p">,</span> <span class="mi">1</span><span class="p">)</span>
+      <span class="k">else</span>
+        <span class="err">@</span><span class="nx">tag</span> <span class="mi">1</span><span class="p">,</span> <span class="s1">&#39;PROPERTY_ACCESS&#39;</span></pre></div>             </td>           </tr>                               <tr id="section-24">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-24">#</a>               </div>               <p>Sanitize a heredoc by escaping internal double quotes and erasing all
+external indentation on the left-hand side.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">sanitize_heredoc: </span><span class="p">(</span><span class="nx">doc</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="nv">indent: </span><span class="p">(</span><span class="nx">doc</span><span class="p">.</span><span class="nx">match</span><span class="p">(</span><span class="nx">HEREDOC_INDENT</span><span class="p">)</span> <span class="o">or</span> <span class="p">[</span><span class="s1">&#39;&#39;</span><span class="p">]).</span><span class="nx">sort</span><span class="p">()[</span><span class="mi">0</span><span class="p">]</span>
+    <span class="nx">doc</span><span class="p">.</span><span class="nx">replace</span><span class="p">(</span><span class="k">new</span> <span class="nb">RegExp</span><span class="p">(</span><span class="s2">&quot;^&quot;</span> <span class="o">+</span><span class="nx">indent</span><span class="p">,</span> <span class="s1">&#39;gm&#39;</span><span class="p">),</span> <span class="s1">&#39;&#39;</span><span class="p">)</span>
+       <span class="p">.</span><span class="nx">replace</span><span class="p">(</span><span class="nx">MULTILINER</span><span class="p">,</span> <span class="s2">&quot;\\n&quot;</span><span class="p">)</span>
+       <span class="p">.</span><span class="nx">replace</span><span class="p">(</span><span class="sr">/&quot;/g</span><span class="p">,</span> <span class="s1">&#39;\\&quot;&#39;</span><span class="p">)</span></pre></div>             </td>           </tr>                               <tr id="section-25">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-25">#</a>               </div>               <p>A source of ambiguity in our grammar used to be parameter lists in function
+definitions versus argument lists in function calls. Walk backwards, tagging
+parameters specially in order to make things easier for the parser.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">tag_parameters: </span><span class="o">-&gt;</span>
+    <span class="k">return</span> <span class="k">if</span> <span class="err">@</span><span class="nx">tag</span><span class="p">()</span> <span class="o">isnt</span> <span class="s1">&#39;)&#39;</span>
+    <span class="nv">i: </span><span class="mi">0</span>
+    <span class="k">while</span> <span class="kc">true</span>
+      <span class="nx">i</span> <span class="o">+=</span> <span class="mi">1</span>
+      <span class="nv">tok: </span><span class="err">@</span><span class="nx">prev</span><span class="p">(</span><span class="nx">i</span><span class="p">)</span>
+      <span class="k">return</span> <span class="k">if</span> <span class="o">not</span> <span class="nx">tok</span>
+      <span class="k">switch</span> <span class="nx">tok</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
+        <span class="k">when</span> <span class="s1">&#39;IDENTIFIER&#39;</span> <span class="k">then</span> <span class="nx">tok</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="o">:</span> <span class="s1">&#39;PARAM&#39;</span>
+        <span class="k">when</span> <span class="s1">&#39;)&#39;</span>          <span class="k">then</span> <span class="nx">tok</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="o">:</span> <span class="s1">&#39;PARAM_END&#39;</span>
+        <span class="k">when</span> <span class="s1">&#39;(&#39;</span>          <span class="k">then</span> <span class="k">return</span> <span class="nx">tok</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="o">:</span> <span class="s1">&#39;PARAM_START&#39;</span>
+    <span class="kc">true</span></pre></div>             </td>           </tr>                               <tr id="section-26">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-26">#</a>               </div>               <p>Close up all remaining open blocks at the end of the file.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">close_indentation: </span><span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nx">outdent_token</span><span class="p">(</span><span class="err">@</span><span class="nx">indent</span><span class="p">)</span></pre></div>             </td>           </tr>                               <tr id="section-27">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-27">#</a>               </div>               <p>The error for when you try to use a forbidden word in JavaScript as
+an identifier.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">identifier_error: </span><span class="p">(</span><span class="nx">word</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="k">throw</span> <span class="k">new</span> <span class="nb">Error</span> <span class="s2">&quot;SyntaxError: Reserved word \&quot;$word\&quot; on line ${@line + 1}&quot;</span></pre></div>             </td>           </tr>                               <tr id="section-28">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-28">#</a>               </div>               <p>The error for when you try to assign to a reserved word in JavaScript,
+like "function" or "default".</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">assignment_error: </span><span class="o">-&gt;</span>
+    <span class="k">throw</span> <span class="k">new</span> <span class="nb">Error</span> <span class="s2">&quot;SyntaxError: Reserved word \&quot;${@value()}\&quot; on line ${@line + 1} can&#39;t be assigned&quot;</span></pre></div>             </td>           </tr>                               <tr id="section-29">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-29">#</a>               </div>               <p>Matches a balanced group such as a single or double-quoted string. Pass in
+a series of delimiters, all of which must be nested correctly within the
+contents of the string. This method allows us to have strings within
+interpolations within strings etc...</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">balanced_string: </span><span class="p">(</span><span class="nx">str</span><span class="p">,</span> <span class="nx">delimited</span><span class="p">...)</span> <span class="o">-&gt;</span>
+    <span class="nv">levels: </span><span class="p">[]</span>
+    <span class="nv">i: </span><span class="mi">0</span>
+    <span class="k">while</span> <span class="nx">i</span> <span class="o">&lt;</span> <span class="nx">str</span><span class="p">.</span><span class="nx">length</span>
+      <span class="k">for</span> <span class="nx">pair</span> <span class="k">in</span> <span class="nx">delimited</span>
+        <span class="p">[</span><span class="nx">open</span><span class="p">,</span> <span class="nx">close</span><span class="p">]</span><span class="o">:</span> <span class="nx">pair</span>
+        <span class="k">if</span> <span class="nx">levels</span><span class="p">.</span><span class="nx">length</span> <span class="o">and</span> <span class="nx">starts</span> <span class="nx">str</span><span class="p">,</span> <span class="s1">&#39;\\&#39;</span><span class="p">,</span> <span class="nx">i</span>
+          <span class="nx">i</span> <span class="o">+=</span> <span class="mi">1</span>
+          <span class="k">break</span>
+        <span class="k">else</span> <span class="k">if</span> <span class="nx">levels</span><span class="p">.</span><span class="nx">length</span> <span class="o">and</span> <span class="nx">starts</span><span class="p">(</span><span class="nx">str</span><span class="p">,</span> <span class="nx">close</span><span class="p">,</span> <span class="nx">i</span><span class="p">)</span> <span class="o">and</span> <span class="nx">levels</span><span class="p">[</span><span class="nx">levels</span><span class="p">.</span><span class="nx">length</span> <span class="o">-</span> <span class="mi">1</span><span class="p">]</span> <span class="o">is</span> <span class="nx">pair</span>
+          <span class="nx">levels</span><span class="p">.</span><span class="nx">pop</span><span class="p">()</span>
+          <span class="nx">i</span> <span class="o">+=</span> <span class="nx">close</span><span class="p">.</span><span class="nx">length</span> <span class="o">-</span> <span class="mi">1</span>
+          <span class="nx">i</span> <span class="o">+=</span> <span class="mi">1</span> <span class="nx">unless</span> <span class="nx">levels</span><span class="p">.</span><span class="nx">length</span>
+          <span class="k">break</span>
+        <span class="k">else</span> <span class="k">if</span> <span class="nx">starts</span> <span class="nx">str</span><span class="p">,</span> <span class="nx">open</span><span class="p">,</span> <span class="nx">i</span>
+          <span class="nx">levels</span><span class="p">.</span><span class="nx">push</span><span class="p">(</span><span class="nx">pair</span><span class="p">)</span>
+          <span class="nx">i</span> <span class="o">+=</span> <span class="nx">open</span><span class="p">.</span><span class="nx">length</span> <span class="o">-</span> <span class="mi">1</span>
+          <span class="k">break</span>
+      <span class="k">break</span> <span class="nx">unless</span> <span class="nx">levels</span><span class="p">.</span><span class="nx">length</span>
+      <span class="nx">i</span> <span class="o">+=</span> <span class="mi">1</span>
+    <span class="k">throw</span> <span class="k">new</span> <span class="nb">Error</span> <span class="s2">&quot;SyntaxError: Unterminated ${levels.pop()[0]} starting on line ${@line + 1}&quot;</span> <span class="k">if</span> <span class="nx">levels</span><span class="p">.</span><span class="nx">length</span>
+    <span class="k">return</span> <span class="kc">false</span> <span class="k">if</span> <span class="nx">i</span> <span class="o">is</span> <span class="mi">0</span>
+    <span class="k">return</span> <span class="nx">str</span><span class="p">.</span><span class="nx">substring</span><span class="p">(</span><span class="mi">0</span><span class="p">,</span> <span class="nx">i</span><span class="p">)</span></pre></div>             </td>           </tr>                               <tr id="section-30">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-30">#</a>               </div>               <p>Expand variables and expressions inside double-quoted strings using
+<a href="http://wiki.ecmascript.org/doku.php?id=strawman:string_interpolation">ECMA Harmony's interpolation syntax</a>
+for substitution of bare variables as well as arbitrary expressions.</p>
+
+<pre><code>"Hello $name."
+"Hello ${name.capitalize()}."
+</code></pre>
+
+<p>If it encounters an interpolation, this method will recursively create a
+new Lexer, tokenize the interpolated contents, and merge them into the
+token stream.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">interpolate_string: </span><span class="p">(</span><span class="nx">str</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="k">if</span> <span class="nx">str</span><span class="p">.</span><span class="nx">length</span> <span class="o">&lt;</span> <span class="mi">3</span> <span class="o">or</span> <span class="o">not</span> <span class="nx">starts</span> <span class="nx">str</span><span class="p">,</span> <span class="s1">&#39;&quot;&#39;</span>
+      <span class="err">@</span><span class="nx">token</span> <span class="s1">&#39;STRING&#39;</span><span class="p">,</span> <span class="nx">str</span>
+    <span class="k">else</span>
+      <span class="nv">lexer: </span>   <span class="k">new</span> <span class="nx">Lexer</span><span class="p">()</span>
+      <span class="nv">tokens: </span>  <span class="p">[]</span>
+      <span class="nv">quote: </span>   <span class="nx">str</span><span class="p">.</span><span class="nx">substring</span><span class="p">(</span><span class="mi">0</span><span class="p">,</span> <span class="mi">1</span><span class="p">)</span>
+      <span class="p">[</span><span class="nx">i</span><span class="p">,</span> <span class="nx">pi</span><span class="p">]</span><span class="o">:</span>  <span class="p">[</span><span class="mi">1</span><span class="p">,</span> <span class="mi">1</span><span class="p">]</span>
+      <span class="k">while</span> <span class="nx">i</span> <span class="o">&lt;</span> <span class="nx">str</span><span class="p">.</span><span class="nx">length</span> <span class="o">-</span> <span class="mi">1</span>
+        <span class="k">if</span> <span class="nx">starts</span> <span class="nx">str</span><span class="p">,</span> <span class="s1">&#39;\\&#39;</span><span class="p">,</span> <span class="nx">i</span>
+          <span class="nx">i</span> <span class="o">+=</span> <span class="mi">1</span>
+        <span class="k">else</span> <span class="k">if</span> <span class="nv">match: </span><span class="nx">str</span><span class="p">.</span><span class="nx">substring</span><span class="p">(</span><span class="nx">i</span><span class="p">).</span><span class="nx">match</span> <span class="nx">INTERPOLATION</span>
+          <span class="p">[</span><span class="nx">group</span><span class="p">,</span> <span class="nx">interp</span><span class="p">]</span><span class="o">:</span> <span class="nx">match</span>
+          <span class="nv">interp: </span><span class="s2">&quot;this.${ interp.substring(1) }&quot;</span> <span class="k">if</span> <span class="nx">starts</span> <span class="nx">interp</span><span class="p">,</span> <span class="s1">&#39;@&#39;</span>
+          <span class="nx">tokens</span><span class="p">.</span><span class="nx">push</span> <span class="p">[</span><span class="s1">&#39;STRING&#39;</span><span class="p">,</span> <span class="s2">&quot;$quote${ str.substring(pi, i) }$quote&quot;</span><span class="p">]</span> <span class="k">if</span> <span class="nx">pi</span> <span class="o">&lt;</span> <span class="nx">i</span>
+          <span class="nx">tokens</span><span class="p">.</span><span class="nx">push</span> <span class="p">[</span><span class="s1">&#39;IDENTIFIER&#39;</span><span class="p">,</span> <span class="nx">interp</span><span class="p">]</span>
+          <span class="nx">i</span> <span class="o">+=</span> <span class="nx">group</span><span class="p">.</span><span class="nx">length</span> <span class="o">-</span> <span class="mi">1</span>
+          <span class="nv">pi: </span><span class="nx">i</span> <span class="o">+</span> <span class="mi">1</span>
+        <span class="k">else</span> <span class="k">if</span> <span class="p">(</span><span class="nv">expr: </span><span class="err">@</span><span class="nx">balanced_string</span> <span class="nx">str</span><span class="p">.</span><span class="nx">substring</span><span class="p">(</span><span class="nx">i</span><span class="p">),</span> <span class="p">[</span><span class="s1">&#39;${&#39;</span><span class="p">,</span> <span class="s1">&#39;}&#39;</span><span class="p">])</span>
+          <span class="nx">tokens</span><span class="p">.</span><span class="nx">push</span> <span class="p">[</span><span class="s1">&#39;STRING&#39;</span><span class="p">,</span> <span class="s2">&quot;$quote${ str.substring(pi, i) }$quote&quot;</span><span class="p">]</span> <span class="k">if</span> <span class="nx">pi</span> <span class="o">&lt;</span> <span class="nx">i</span>
+          <span class="nv">inner: </span><span class="nx">expr</span><span class="p">.</span><span class="nx">substring</span><span class="p">(</span><span class="mi">2</span><span class="p">,</span> <span class="nx">expr</span><span class="p">.</span><span class="nx">length</span> <span class="o">-</span> <span class="mi">1</span><span class="p">)</span>
+          <span class="k">if</span> <span class="nx">inner</span><span class="p">.</span><span class="nx">length</span>
+            <span class="nv">nested: </span><span class="nx">lexer</span><span class="p">.</span><span class="nx">tokenize</span> <span class="s2">&quot;($inner)&quot;</span><span class="p">,</span> <span class="p">{</span><span class="nv">rewrite: </span><span class="kc">no</span><span class="p">,</span> <span class="nv">line: </span><span class="err">@</span><span class="nx">line</span><span class="p">}</span>
+            <span class="nx">nested</span><span class="p">.</span><span class="nx">pop</span><span class="p">()</span>
+            <span class="nx">tokens</span><span class="p">.</span><span class="nx">push</span> <span class="p">[</span><span class="s1">&#39;TOKENS&#39;</span><span class="p">,</span> <span class="nx">nested</span><span class="p">]</span>
+          <span class="k">else</span>
+            <span class="nx">tokens</span><span class="p">.</span><span class="nx">push</span> <span class="p">[</span><span class="s1">&#39;STRING&#39;</span><span class="p">,</span> <span class="s2">&quot;$quote$quote&quot;</span><span class="p">]</span>
+          <span class="nx">i</span> <span class="o">+=</span> <span class="nx">expr</span><span class="p">.</span><span class="nx">length</span> <span class="o">-</span> <span class="mi">1</span>
+          <span class="nv">pi: </span><span class="nx">i</span> <span class="o">+</span> <span class="mi">1</span>
+        <span class="nx">i</span> <span class="o">+=</span> <span class="mi">1</span>
+      <span class="nx">tokens</span><span class="p">.</span><span class="nx">push</span> <span class="p">[</span><span class="s1">&#39;STRING&#39;</span><span class="p">,</span> <span class="s2">&quot;$quote${ str.substring(pi, i) }$quote&quot;</span><span class="p">]</span> <span class="k">if</span> <span class="nx">pi</span> <span class="o">&lt;</span> <span class="nx">i</span> <span class="o">and</span> <span class="nx">pi</span> <span class="o">&lt;</span> <span class="nx">str</span><span class="p">.</span><span class="nx">length</span> <span class="o">-</span> <span class="mi">1</span>
+      <span class="k">for</span> <span class="nx">each</span><span class="p">,</span> <span class="nx">i</span> <span class="k">in</span> <span class="nx">tokens</span>
+        <span class="k">if</span> <span class="nx">each</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">is</span> <span class="s1">&#39;TOKENS&#39;</span>
+          <span class="err">@</span><span class="nv">tokens: </span><span class="err">@</span><span class="nx">tokens</span><span class="p">.</span><span class="nx">concat</span> <span class="nx">each</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span>
+        <span class="k">else</span>
+          <span class="err">@</span><span class="nx">token</span> <span class="nx">each</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="nx">each</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span>
+        <span class="err">@</span><span class="nx">token</span> <span class="s1">&#39;+&#39;</span><span class="p">,</span> <span class="s1">&#39;+&#39;</span> <span class="k">if</span> <span class="nx">i</span> <span class="o">&lt;</span> <span class="nx">tokens</span><span class="p">.</span><span class="nx">length</span> <span class="o">-</span> <span class="mi">1</span></pre></div>             </td>           </tr>                               <tr id="section-31">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-31">#</a>               </div>               <h2>Helpers</h2>             </td>             <td class="code">               <div class="highlight"><pre></pre></div>             </td>           </tr>                               <tr id="section-32">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-32">#</a>               </div>               <p>Add a token to the results, taking note of the line number.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">token: </span><span class="p">(</span><span class="nx">tag</span><span class="p">,</span> <span class="nx">value</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nx">tokens</span><span class="p">.</span><span class="nx">push</span><span class="p">([</span><span class="nx">tag</span><span class="p">,</span> <span class="nx">value</span><span class="p">,</span> <span class="err">@</span><span class="nx">line</span><span class="p">])</span></pre></div>             </td>           </tr>                               <tr id="section-33">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-33">#</a>               </div>               <p>Peek at a tag in the current token stream.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">tag: </span><span class="p">(</span><span class="nx">index</span><span class="p">,</span> <span class="nx">tag</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="k">return</span> <span class="nx">unless</span> <span class="nv">tok: </span><span class="err">@</span><span class="nx">prev</span><span class="p">(</span><span class="nx">index</span><span class="p">)</span>
+    <span class="k">return</span> <span class="nx">tok</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="o">:</span> <span class="nx">tag</span> <span class="k">if</span> <span class="nx">tag</span><span class="o">?</span>
+    <span class="nx">tok</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-34">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-34">#</a>               </div>               <p>Peek at a value in the current token stream.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">value: </span><span class="p">(</span><span class="nx">index</span><span class="p">,</span> <span class="nx">val</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="k">return</span> <span class="nx">unless</span> <span class="nv">tok: </span><span class="err">@</span><span class="nx">prev</span><span class="p">(</span><span class="nx">index</span><span class="p">)</span>
+    <span class="k">return</span> <span class="nx">tok</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span><span class="o">:</span> <span class="nx">val</span> <span class="k">if</span> <span class="nx">val</span><span class="o">?</span>
+    <span class="nx">tok</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-35">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-35">#</a>               </div>               <p>Peek at a previous token, entire.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">prev: </span><span class="p">(</span><span class="nx">index</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nx">tokens</span><span class="p">[</span><span class="err">@</span><span class="nx">tokens</span><span class="p">.</span><span class="nx">length</span> <span class="o">-</span> <span class="p">(</span><span class="nx">index</span> <span class="o">or</span> <span class="mi">1</span><span class="p">)]</span></pre></div>             </td>           </tr>                               <tr id="section-36">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-36">#</a>               </div>               <p>Attempt to match a string against the current chunk, returning the indexed
+match if successful, and <code>false</code> otherwise.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">match: </span><span class="p">(</span><span class="nx">regex</span><span class="p">,</span> <span class="nx">index</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="k">return</span> <span class="kc">false</span> <span class="nx">unless</span> <span class="nv">m: </span><span class="err">@</span><span class="nx">chunk</span><span class="p">.</span><span class="nx">match</span><span class="p">(</span><span class="nx">regex</span><span class="p">)</span>
+    <span class="k">if</span> <span class="nx">m</span> <span class="k">then</span> <span class="nx">m</span><span class="p">[</span><span class="nx">index</span><span class="p">]</span> <span class="k">else</span> <span class="kc">false</span></pre></div>             </td>           </tr>                               <tr id="section-37">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-37">#</a>               </div>               <h2>Constants</h2>             </td>             <td class="code">               <div class="highlight"><pre></pre></div>             </td>           </tr>                               <tr id="section-38">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-38">#</a>               </div>               <p>Keywords that CoffeeScript shares in common with JavaScript.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">JS_KEYWORDS: </span><span class="p">[</span>
+  <span class="s2">&quot;if&quot;</span><span class="p">,</span> <span class="s2">&quot;else&quot;</span><span class="p">,</span>
+  <span class="s2">&quot;true&quot;</span><span class="p">,</span> <span class="s2">&quot;false&quot;</span><span class="p">,</span>
+  <span class="s2">&quot;new&quot;</span><span class="p">,</span> <span class="s2">&quot;return&quot;</span><span class="p">,</span>
+  <span class="s2">&quot;try&quot;</span><span class="p">,</span> <span class="s2">&quot;catch&quot;</span><span class="p">,</span> <span class="s2">&quot;finally&quot;</span><span class="p">,</span> <span class="s2">&quot;throw&quot;</span><span class="p">,</span>
+  <span class="s2">&quot;break&quot;</span><span class="p">,</span> <span class="s2">&quot;continue&quot;</span><span class="p">,</span>
+  <span class="s2">&quot;for&quot;</span><span class="p">,</span> <span class="s2">&quot;in&quot;</span><span class="p">,</span> <span class="s2">&quot;while&quot;</span><span class="p">,</span>
+  <span class="s2">&quot;delete&quot;</span><span class="p">,</span> <span class="s2">&quot;instanceof&quot;</span><span class="p">,</span> <span class="s2">&quot;typeof&quot;</span><span class="p">,</span>
+  <span class="s2">&quot;switch&quot;</span><span class="p">,</span> <span class="s2">&quot;super&quot;</span><span class="p">,</span> <span class="s2">&quot;extends&quot;</span><span class="p">,</span> <span class="s2">&quot;class&quot;</span>
+<span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-39">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-39">#</a>               </div>               <p>CoffeeScript-only keywords, which we're more relaxed about allowing. They can't
+be used standalone, but you can reference them as an attached property.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">COFFEE_KEYWORDS: </span><span class="p">[</span>
+  <span class="s2">&quot;then&quot;</span><span class="p">,</span> <span class="s2">&quot;unless&quot;</span><span class="p">,</span>
+  <span class="s2">&quot;yes&quot;</span><span class="p">,</span> <span class="s2">&quot;no&quot;</span><span class="p">,</span> <span class="s2">&quot;on&quot;</span><span class="p">,</span> <span class="s2">&quot;off&quot;</span><span class="p">,</span>
+  <span class="s2">&quot;and&quot;</span><span class="p">,</span> <span class="s2">&quot;or&quot;</span><span class="p">,</span> <span class="s2">&quot;is&quot;</span><span class="p">,</span> <span class="s2">&quot;isnt&quot;</span><span class="p">,</span> <span class="s2">&quot;not&quot;</span><span class="p">,</span>
+  <span class="s2">&quot;of&quot;</span><span class="p">,</span> <span class="s2">&quot;by&quot;</span><span class="p">,</span> <span class="s2">&quot;where&quot;</span><span class="p">,</span> <span class="s2">&quot;when&quot;</span>
+<span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-40">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-40">#</a>               </div>               <p>The combined list of keywords is the superset that gets passed verbatim to
+the parser.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">KEYWORDS: </span><span class="nx">JS_KEYWORDS</span><span class="p">.</span><span class="nx">concat</span> <span class="nx">COFFEE_KEYWORDS</span></pre></div>             </td>           </tr>                               <tr id="section-41">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-41">#</a>               </div>               <p>The list of keywords that are reserved by JavaScript, but not used, or are
+used by CoffeeScript internally. We throw an error when these are encountered,
+to avoid having a JavaScript error at runtime.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">RESERVED: </span><span class="p">[</span>
+  <span class="s2">&quot;case&quot;</span><span class="p">,</span> <span class="s2">&quot;default&quot;</span><span class="p">,</span> <span class="s2">&quot;do&quot;</span><span class="p">,</span> <span class="s2">&quot;function&quot;</span><span class="p">,</span> <span class="s2">&quot;var&quot;</span><span class="p">,</span> <span class="s2">&quot;void&quot;</span><span class="p">,</span> <span class="s2">&quot;with&quot;</span>
+  <span class="s2">&quot;const&quot;</span><span class="p">,</span> <span class="s2">&quot;let&quot;</span><span class="p">,</span> <span class="s2">&quot;debugger&quot;</span><span class="p">,</span> <span class="s2">&quot;enum&quot;</span><span class="p">,</span> <span class="s2">&quot;export&quot;</span><span class="p">,</span> <span class="s2">&quot;import&quot;</span><span class="p">,</span> <span class="s2">&quot;native&quot;</span><span class="p">,</span>
+  <span class="s2">&quot;__extends&quot;</span><span class="p">,</span> <span class="s2">&quot;__hasProp&quot;</span>
+<span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-42">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-42">#</a>               </div>               <p>The superset of both JavaScript keywords and reserved words, none of which may
+be used as identifiers or properties.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">JS_FORBIDDEN: </span><span class="nx">JS_KEYWORDS</span><span class="p">.</span><span class="nx">concat</span> <span class="nx">RESERVED</span></pre></div>             </td>           </tr>                               <tr id="section-43">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-43">#</a>               </div>               <p>Token matching regexes.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nx">IDENTIFIER</span>    <span class="o">:</span> <span class="sr">/^([a-zA-Z$_](\w|\$)*)/</span>
+<span class="nx">NUMBER</span>        <span class="o">:</span> <span class="sr">/^(\b((0(x|X)[0-9a-fA-F]+)|([0-9]+(\.[0-9]+)?(e[+\-]?[0-9]+)?)))\b/i</span>
+<span class="nx">HEREDOC</span>       <span class="o">:</span> <span class="sr">/^(&quot;{6}|&#39;{6}|&quot;{3}\n?([\s\S]*?)\n?([ \t]*)&quot;{3}|&#39;{3}\n?([\s\S]*?)\n?([ \t]*)&#39;{3})/</span>
+<span class="nx">INTERPOLATION</span> <span class="o">:</span> <span class="sr">/^\$([a-zA-Z_@]\w*(\.\w+)*)/</span>
+<span class="nx">OPERATOR</span>      <span class="o">:</span> <span class="sr">/^([+\*&amp;|\/\-%=&lt;&gt;:!?]+)/</span>
+<span class="nx">WHITESPACE</span>    <span class="o">:</span> <span class="sr">/^([ \t]+)/</span>
+<span class="nx">COMMENT</span>       <span class="o">:</span> <span class="sr">/^(((\n?[ \t]*)?#[^\n]*)+)/</span>
+<span class="nx">CODE</span>          <span class="o">:</span> <span class="sr">/^((-|=)&gt;)/</span>
+<span class="nx">REGEX</span>         <span class="o">:</span> <span class="sr">/^(\/(\S.*?)?([^\\]|\\\\)\/[imgy]{0,4})/</span>
+<span class="nx">MULTI_DENT</span>    <span class="o">:</span> <span class="sr">/^((\n([ \t]*))+)(\.)?/</span>
+<span class="nx">LAST_DENTS</span>    <span class="o">:</span> <span class="sr">/\n([ \t]*)/g</span>
+<span class="nx">LAST_DENT</span>     <span class="o">:</span> <span class="sr">/\n([ \t]*)/</span>
+<span class="nx">ASSIGNMENT</span>    <span class="o">:</span> <span class="sr">/^(:|=)$/</span></pre></div>             </td>           </tr>                               <tr id="section-44">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-44">#</a>               </div>               <p>Token cleaning regexes.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nx">JS_CLEANER</span>      <span class="o">:</span> <span class="sr">/(^`|`$)/g</span>
+<span class="nx">MULTILINER</span>      <span class="o">:</span> <span class="sr">/\n/g</span>
+<span class="nx">STRING_NEWLINES</span> <span class="o">:</span> <span class="sr">/\n[ \t]*/g</span>
+<span class="nx">COMMENT_CLEANER</span> <span class="o">:</span> <span class="sr">/(^[ \t]*#|\n[ \t]*$)/mg</span>
+<span class="nx">NO_NEWLINE</span>      <span class="o">:</span> <span class="sr">/^([+\*&amp;|\/\-%=&lt;&gt;:!.\\][&lt;&gt;=&amp;|]*|and|or|is|isnt|not|delete|typeof|instanceof)$/</span>
+<span class="nx">HEREDOC_INDENT</span>  <span class="o">:</span> <span class="sr">/^[ \t]+/mg</span></pre></div>             </td>           </tr>                               <tr id="section-45">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-45">#</a>               </div>               <p>Tokens which a regular expression will never immediately follow, but which
+a division operator might.</p>
+
+<p>See: <a href='http://www.mozilla.org/js/language/js20-2002-04/rationale/syntax.html#regular-expressions'>http://www.mozilla.org/js/language/js20-2002-04/rationale/syntax.html#regular-expressions</a></p>
+
+<p>Our list is shorter, due to sans-parentheses method calls.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">NOT_REGEX: </span><span class="p">[</span>
+  <span class="s1">&#39;NUMBER&#39;</span><span class="p">,</span> <span class="s1">&#39;REGEX&#39;</span><span class="p">,</span> <span class="s1">&#39;++&#39;</span><span class="p">,</span> <span class="s1">&#39;--&#39;</span><span class="p">,</span> <span class="s1">&#39;FALSE&#39;</span><span class="p">,</span> <span class="s1">&#39;NULL&#39;</span><span class="p">,</span> <span class="s1">&#39;TRUE&#39;</span>
+<span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-46">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-46">#</a>               </div>               <p>Tokens which could legitimately be invoked or indexed. A opening
+parentheses or bracket following these tokens will be recorded as the start
+of a function invocation or indexing operation.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">CALLABLE: </span><span class="p">[</span><span class="s1">&#39;IDENTIFIER&#39;</span><span class="p">,</span> <span class="s1">&#39;SUPER&#39;</span><span class="p">,</span> <span class="s1">&#39;)&#39;</span><span class="p">,</span> <span class="s1">&#39;]&#39;</span><span class="p">,</span> <span class="s1">&#39;}&#39;</span><span class="p">,</span> <span class="s1">&#39;STRING&#39;</span><span class="p">,</span> <span class="s1">&#39;@&#39;</span><span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-47">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-47">#</a>               </div>               <p>Tokens that indicate an access -- keywords immediately following will be
+treated as identifiers.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">ACCESSORS: </span><span class="p">[</span><span class="s1">&#39;PROPERTY_ACCESS&#39;</span><span class="p">,</span> <span class="s1">&#39;PROTOTYPE_ACCESS&#39;</span><span class="p">,</span> <span class="s1">&#39;SOAK_ACCESS&#39;</span><span class="p">,</span> <span class="s1">&#39;@&#39;</span><span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-48">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-48">#</a>               </div>               <p>Tokens that, when immediately preceding a <code>WHEN</code>, indicate that the <code>WHEN</code>
+occurs at the start of a line. We disambiguate these from trailing whens to
+avoid an ambiguity in the grammar.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">BEFORE_WHEN: </span><span class="p">[</span><span class="s1">&#39;INDENT&#39;</span><span class="p">,</span> <span class="s1">&#39;OUTDENT&#39;</span><span class="p">,</span> <span class="s1">&#39;TERMINATOR&#39;</span><span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-49">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-49">#</a>               </div>               <h2>Utility Functions</h2>             </td>             <td class="code">               <div class="highlight"><pre></pre></div>             </td>           </tr>                               <tr id="section-50">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-50">#</a>               </div>               <p>Does a list include a value?</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">include: </span><span class="p">(</span><span class="nx">list</span><span class="p">,</span> <span class="nx">value</span><span class="p">)</span> <span class="o">-&gt;</span>
+  <span class="nx">list</span><span class="p">.</span><span class="nx">indexOf</span><span class="p">(</span><span class="nx">value</span><span class="p">)</span> <span class="o">&gt;=</span> <span class="mi">0</span></pre></div>             </td>           </tr>                               <tr id="section-51">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-51">#</a>               </div>               <p>Peek at the beginning of a given string to see if it matches a sequence.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">starts: </span><span class="p">(</span><span class="nx">string</span><span class="p">,</span> <span class="nx">literal</span><span class="p">,</span> <span class="nx">start</span><span class="p">)</span> <span class="o">-&gt;</span>
+  <span class="nx">string</span><span class="p">.</span><span class="nx">substring</span><span class="p">(</span><span class="nx">start</span><span class="p">,</span> <span class="p">(</span><span class="nx">start</span> <span class="o">or</span> <span class="mi">0</span><span class="p">)</span> <span class="o">+</span> <span class="nx">literal</span><span class="p">.</span><span class="nx">length</span><span class="p">)</span> <span class="o">is</span> <span class="nx">literal</span></pre></div>             </td>           </tr>                               <tr id="section-52">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-52">#</a>               </div>               <p>Trim out all falsy values from an array.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">compact: </span><span class="p">(</span><span class="nx">array</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="nx">item</span> <span class="k">for</span> <span class="nx">item</span> <span class="k">in</span> <span class="nx">array</span> <span class="k">when</span> <span class="nx">item</span></pre></div>             </td>           </tr>                               <tr id="section-53">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-53">#</a>               </div>               <p>Count the number of occurences of a character in a string.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">count: </span><span class="p">(</span><span class="nx">string</span><span class="p">,</span> <span class="nx">letter</span><span class="p">)</span> <span class="o">-&gt;</span>
+  <span class="nv">num: </span><span class="mi">0</span>
+  <span class="nv">pos: </span><span class="nx">string</span><span class="p">.</span><span class="nx">indexOf</span><span class="p">(</span><span class="nx">letter</span><span class="p">)</span>
+  <span class="k">while</span> <span class="nx">pos</span> <span class="o">isnt</span> <span class="o">-</span><span class="mi">1</span>
+    <span class="nx">num</span> <span class="o">+=</span> <span class="mi">1</span>
+    <span class="nv">pos: </span><span class="nx">string</span><span class="p">.</span><span class="nx">indexOf</span><span class="p">(</span><span class="nx">letter</span><span class="p">,</span> <span class="nx">pos</span> <span class="o">+</span> <span class="mi">1</span><span class="p">)</span>
+  <span class="nx">num</span>
+
+</pre></div>             </td>           </tr>                </tbody>     </table>   </div> </body> </html> 

documentation/docs/nodes.html

@@ -0,0 +1,857 @@
+<!DOCTYPE html>  <html> <head>   <title>nodes.coffee</title>   <meta http-equiv="content-type" content="text/html; charset=UTF-8">   <link rel="stylesheet" media="all" href="docco.css" /> </head> <body>   <div id="container">     <div id="background"></div>            <div id="jump_to">         Jump To &hellip;         <div id="jump_wrapper">           <div id="jump_page">                                           <a class="source" href="cake.html">                 cake.coffee               </a>                                           <a class="source" href="coffee-script.html">                 coffee-script.coffee               </a>                                           <a class="source" href="command.html">                 command.coffee               </a>                                           <a class="source" href="grammar.html">                 grammar.coffee               </a>                                           <a class="source" href="lexer.html">                 lexer.coffee               </a>                                           <a class="source" href="nodes.html">                 nodes.coffee               </a>                                           <a class="source" href="optparse.html">                 optparse.coffee               </a>                                           <a class="source" href="repl.html">                 repl.coffee               </a>                                           <a class="source" href="rewriter.html">                 rewriter.coffee               </a>                                           <a class="source" href="scope.html">                 scope.coffee               </a>                        </div>         </div>       </div>          <table cellpadding="0" cellspacing="0">       <thead>         <tr>           <th class="docs">             <h1>               nodes.coffee             </h1>           </th>           <th class="code">           </th>         </tr>       </thead>       <tbody>                               <tr id="section-1">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-1">#</a>               </div>               <p><code>nodes.coffee</code> contains all of the node classes for the syntax tree. Most
+nodes are created as the result of actions in the <a href="grammar.html">grammar</a>,
+but some are created by other nodes as a method of code generation. To convert
+the syntax tree into a string of JavaScript code, call <code>compile()</code> on the root.</p>             </td>             <td class="code">               <div class="highlight"><pre></pre></div>             </td>           </tr>                               <tr id="section-2">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-2">#</a>               </div>               <p>Set up for both <strong>Node.js</strong> and the browser, by
+including the <a href="scope.html">Scope</a> class.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="k">if</span> <span class="nx">process</span><span class="o">?</span>
+  <span class="nx">process</span><span class="p">.</span><span class="nx">mixin</span> <span class="nx">require</span> <span class="s1">&#39;scope&#39;</span>
+<span class="k">else</span>
+  <span class="k">this</span><span class="p">.</span><span class="nv">exports: </span><span class="k">this</span></pre></div>             </td>           </tr>                               <tr id="section-3">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-3">#</a>               </div>               <p>Helper function that marks a node as a JavaScript <em>statement</em>, or as a
+<em>pure_statement</em>. Statements must be wrapped in a closure when used as an
+expression, and nodes tagged as <em>pure_statement</em> cannot be closure-wrapped
+without losing their meaning.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">statement: </span><span class="p">(</span><span class="nx">klass</span><span class="p">,</span> <span class="nx">only</span><span class="p">)</span> <span class="o">-&gt;</span>
+  <span class="nv">klass::is_statement: </span><span class="o">-&gt;</span> <span class="kc">true</span>
+  <span class="p">(</span><span class="nv">klass::is_pure_statement: </span><span class="o">-&gt;</span> <span class="kc">true</span><span class="p">)</span> <span class="k">if</span> <span class="nx">only</span></pre></div>             </td>           </tr>                               <tr id="section-4">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-4">#</a>               </div>               <h3>BaseNode</h3>             </td>             <td class="code">               <div class="highlight"><pre></pre></div>             </td>           </tr>                               <tr id="section-5">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-5">#</a>               </div>               <p>The <strong>BaseNode</strong> is the abstract base class for all nodes in the syntax tree.
+Each subclass implements the <code>compile_node</code> method, which performs the
+code generation for that node. To compile a node to JavaScript,
+call <code>compile</code> on it, which wraps <code>compile_node</code> in some generic extra smarts,
+to know when the generated code needs to be wrapped up in a closure.
+An options hash is passed and cloned throughout, containing information about
+the environment from higher in the tree (such as if a returned value is
+being requested by the surrounding function), information about the current
+scope, and indentation level.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">exports.BaseNode: </span><span class="nx">class</span> <span class="nx">BaseNode</span></pre></div>             </td>           </tr>                               <tr id="section-6">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-6">#</a>               </div>               <p>Common logic for determining whether to wrap this node in a closure before
+compiling it, or to compile directly. We need to wrap if this node is a
+<em>statement</em>, and it's not a <em>pure_statement</em>, and we're not at
+the top level of a block (which would be unnecessary), and we haven't
+already been asked to return the result (because statements know how to
+return results).</p>
+
+<p>If a Node is <em>top_sensitive</em>, that means that it needs to compile differently
+depending on whether it's being used as part of a larger expression, or is a
+top-level statement within the function body.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">compile: </span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nv">options: </span><span class="nx">merge</span> <span class="nx">o</span> <span class="o">or</span> <span class="p">{}</span>
+    <span class="err">@</span><span class="nv">tab: </span>    <span class="nx">o</span><span class="p">.</span><span class="nx">indent</span>
+    <span class="nx">del</span> <span class="err">@</span><span class="nx">options</span><span class="p">,</span> <span class="s1">&#39;operation&#39;</span> <span class="nx">unless</span> <span class="err">@</span><span class="nx">operation_sensitive</span><span class="p">()</span>
+    <span class="nv">top: </span>     <span class="k">if</span> <span class="err">@</span><span class="nx">top_sensitive</span><span class="p">()</span> <span class="k">then</span> <span class="err">@</span><span class="nx">options</span><span class="p">.</span><span class="nx">top</span> <span class="k">else</span> <span class="nx">del</span> <span class="err">@</span><span class="nx">options</span><span class="p">,</span> <span class="s1">&#39;top&#39;</span>
+    <span class="nv">closure: </span> <span class="err">@</span><span class="nx">is_statement</span><span class="p">()</span> <span class="o">and</span> <span class="o">not</span> <span class="err">@</span><span class="nx">is_pure_statement</span><span class="p">()</span> <span class="o">and</span> <span class="o">not</span> <span class="nx">top</span> <span class="o">and</span>
+              <span class="o">not</span> <span class="err">@</span><span class="nx">options</span><span class="p">.</span><span class="nx">returns</span> <span class="o">and</span> <span class="o">not</span> <span class="p">(</span><span class="k">this</span> <span class="k">instanceof</span> <span class="nx">CommentNode</span><span class="p">)</span> <span class="o">and</span>
+              <span class="o">not</span> <span class="err">@</span><span class="nx">contains</span> <span class="p">(</span><span class="nx">node</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="nx">node</span><span class="p">.</span><span class="nx">is_pure_statement</span><span class="p">()</span>
+    <span class="k">if</span> <span class="nx">closure</span> <span class="k">then</span> <span class="err">@</span><span class="nx">compile_closure</span><span class="p">(</span><span class="err">@</span><span class="nx">options</span><span class="p">)</span> <span class="k">else</span> <span class="err">@</span><span class="nx">compile_node</span><span class="p">(</span><span class="err">@</span><span class="nx">options</span><span class="p">)</span></pre></div>             </td>           </tr>                               <tr id="section-7">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-7">#</a>               </div>               <p>Statements converted into expressions via closure-wrapping share a scope
+object with their parent closure, to preserve the expected lexical scope.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">compile_closure: </span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nv">tab: </span><span class="nx">o</span><span class="p">.</span><span class="nx">indent</span>
+    <span class="nv">o.shared_scope: </span><span class="nx">o</span><span class="p">.</span><span class="nx">scope</span>
+    <span class="nx">ClosureNode</span><span class="p">.</span><span class="nx">wrap</span><span class="p">(</span><span class="k">this</span><span class="p">).</span><span class="nx">compile</span> <span class="nx">o</span></pre></div>             </td>           </tr>                               <tr id="section-8">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-8">#</a>               </div>               <p>If the code generation wishes to use the result of a complex expression
+in multiple places, ensure that the expression is only ever evaluated once,
+by assigning it to a temporary variable.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">compile_reference: </span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="nv">reference: </span><span class="nx">literal</span> <span class="nx">o</span><span class="p">.</span><span class="nx">scope</span><span class="p">.</span><span class="nx">free_variable</span><span class="p">()</span>
+    <span class="nv">compiled: </span> <span class="k">new</span> <span class="nx">AssignNode</span> <span class="nx">reference</span><span class="p">,</span> <span class="k">this</span>
+    <span class="p">[</span><span class="nx">compiled</span><span class="p">,</span> <span class="nx">reference</span><span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-9">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-9">#</a>               </div>               <p>Convenience method to grab the current indentation level, plus tabbing in.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">idt: </span><span class="p">(</span><span class="nx">tabs</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="nv">idt: </span><span class="err">@</span><span class="nx">tab</span> <span class="o">or</span> <span class="s1">&#39;&#39;</span>
+    <span class="nv">num: </span><span class="p">(</span><span class="nx">tabs</span> <span class="o">or</span> <span class="mi">0</span><span class="p">)</span> <span class="o">+</span> <span class="mi">1</span>
+    <span class="nx">idt</span> <span class="o">+=</span> <span class="nx">TAB</span> <span class="k">while</span> <span class="nx">num</span> <span class="o">-=</span> <span class="mi">1</span>
+    <span class="nx">idt</span></pre></div>             </td>           </tr>                               <tr id="section-10">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-10">#</a>               </div>               <p>Does this node, or any of its children, contain a node of a certain kind?
+Recursively traverses down the <em>children</em> of the nodes, yielding to a block
+and returning true when the block finds a match. <code>contains</code> does not cross
+scope boundaries.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">contains: </span><span class="p">(</span><span class="nx">block</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="k">for</span> <span class="nx">node</span> <span class="k">in</span> <span class="err">@</span><span class="nx">children</span>
+      <span class="k">return</span> <span class="kc">true</span> <span class="k">if</span> <span class="nx">block</span><span class="p">(</span><span class="nx">node</span><span class="p">)</span>
+      <span class="k">return</span> <span class="kc">true</span> <span class="k">if</span> <span class="nx">node</span><span class="p">.</span><span class="nx">contains</span> <span class="o">and</span> <span class="nx">node</span><span class="p">.</span><span class="nx">contains</span> <span class="nx">block</span>
+    <span class="kc">false</span></pre></div>             </td>           </tr>                               <tr id="section-11">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-11">#</a>               </div>               <p>Perform an in-order traversal of the AST. Crosses scope boundaries.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">traverse: </span><span class="p">(</span><span class="nx">block</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="k">for</span> <span class="nx">node</span> <span class="k">in</span> <span class="err">@</span><span class="nx">children</span>
+      <span class="nx">block</span> <span class="nx">node</span>
+      <span class="nx">node</span><span class="p">.</span><span class="nx">traverse</span> <span class="nx">block</span> <span class="k">if</span> <span class="nx">node</span><span class="p">.</span><span class="nx">traverse</span></pre></div>             </td>           </tr>                               <tr id="section-12">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-12">#</a>               </div>               <p><code>toString</code> representation of the node, for inspecting the parse tree.
+This is what <code>coffee --nodes</code> prints out.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">toString: </span><span class="p">(</span><span class="nx">idt</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="nx">idt</span> <span class="o">||=</span> <span class="s1">&#39;&#39;</span>
+    <span class="s1">&#39;\n&#39;</span> <span class="o">+</span> <span class="nx">idt</span> <span class="o">+</span> <span class="err">@</span><span class="nx">type</span> <span class="o">+</span> <span class="p">(</span><span class="nx">child</span><span class="p">.</span><span class="nx">toString</span><span class="p">(</span><span class="nx">idt</span> <span class="o">+</span> <span class="nx">TAB</span><span class="p">)</span> <span class="k">for</span> <span class="nx">child</span> <span class="k">in</span> <span class="err">@</span><span class="nx">children</span><span class="p">).</span><span class="nx">join</span><span class="p">(</span><span class="s1">&#39;&#39;</span><span class="p">)</span></pre></div>             </td>           </tr>                               <tr id="section-13">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-13">#</a>               </div>               <p>Default implementations of the common node identification methods. Nodes
+will override these with custom logic, if needed.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">unwrap: </span>              <span class="o">-&gt;</span> <span class="k">this</span>
+  <span class="nv">children: </span>            <span class="p">[]</span>
+  <span class="nv">is_statement: </span>        <span class="o">-&gt;</span> <span class="kc">false</span>
+  <span class="nv">is_pure_statement: </span>   <span class="o">-&gt;</span> <span class="kc">false</span>
+  <span class="nv">top_sensitive: </span>       <span class="o">-&gt;</span> <span class="kc">false</span>
+  <span class="nv">operation_sensitive: </span> <span class="o">-&gt;</span> <span class="kc">false</span></pre></div>             </td>           </tr>                               <tr id="section-14">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-14">#</a>               </div>               <h3>Expressions</h3>             </td>             <td class="code">               <div class="highlight"><pre></pre></div>             </td>           </tr>                               <tr id="section-15">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-15">#</a>               </div>               <p>The expressions body is the list of expressions that forms the body of an
+indented block of code -- the implementation of a function, a clause in an
+<code>if</code>, <code>switch</code>, or <code>try</code>, and so on...</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">exports.Expressions: </span><span class="nx">class</span> <span class="nx">Expressions</span> <span class="k">extends</span> <span class="nx">BaseNode</span>
+  <span class="nv">type: </span><span class="s1">&#39;Expressions&#39;</span>
+
+  <span class="nv">constructor: </span><span class="p">(</span><span class="nx">nodes</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nv">children: </span><span class="err">@</span><span class="nv">expressions: </span><span class="nx">compact</span> <span class="nx">flatten</span> <span class="nx">nodes</span> <span class="o">or</span> <span class="p">[]</span></pre></div>             </td>           </tr>                               <tr id="section-16">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-16">#</a>               </div>               <p>Tack an expression on to the end of this expression list.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">push: </span><span class="p">(</span><span class="nx">node</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nx">expressions</span><span class="p">.</span><span class="nx">push</span><span class="p">(</span><span class="nx">node</span><span class="p">)</span>
+    <span class="k">this</span></pre></div>             </td>           </tr>                               <tr id="section-17">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-17">#</a>               </div>               <p>Add an expression at the beginning of this expression list.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">unshift: </span><span class="p">(</span><span class="nx">node</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nx">expressions</span><span class="p">.</span><span class="nx">unshift</span><span class="p">(</span><span class="nx">node</span><span class="p">)</span>
+    <span class="k">this</span></pre></div>             </td>           </tr>                               <tr id="section-18">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-18">#</a>               </div>               <p>If this Expressions consists of just a single node, unwrap it by pulling
+it back out.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">unwrap: </span><span class="o">-&gt;</span>
+    <span class="k">if</span> <span class="err">@</span><span class="nx">expressions</span><span class="p">.</span><span class="nx">length</span> <span class="o">is</span> <span class="mi">1</span> <span class="k">then</span> <span class="err">@</span><span class="nx">expressions</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="k">else</span> <span class="k">this</span></pre></div>             </td>           </tr>                               <tr id="section-19">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-19">#</a>               </div>               <p>Is this an empty block of code?</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">empty: </span><span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nx">expressions</span><span class="p">.</span><span class="nx">length</span> <span class="o">is</span> <span class="mi">0</span></pre></div>             </td>           </tr>                               <tr id="section-20">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-20">#</a>               </div>               <p>Is the given node the last one in this block of expressions?</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">is_last: </span><span class="p">(</span><span class="nx">node</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="nv">l: </span><span class="err">@</span><span class="nx">expressions</span><span class="p">.</span><span class="nx">length</span>
+    <span class="nv">last_index: </span><span class="k">if</span> <span class="err">@</span><span class="nx">expressions</span><span class="p">[</span><span class="nx">l</span> <span class="o">-</span> <span class="mi">1</span><span class="p">]</span> <span class="k">instanceof</span> <span class="nx">CommentNode</span> <span class="k">then</span> <span class="mi">2</span> <span class="k">else</span> <span class="mi">1</span>
+    <span class="nx">node</span> <span class="o">is</span> <span class="err">@</span><span class="nx">expressions</span><span class="p">[</span><span class="nx">l</span> <span class="o">-</span> <span class="nx">last_index</span><span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-21">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-21">#</a>               </div>               <p>An <strong>Expressions</strong> is the only node that can serve as the root.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">compile: </span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="nx">o</span> <span class="o">||=</span> <span class="p">{}</span>
+    <span class="k">if</span> <span class="nx">o</span><span class="p">.</span><span class="nx">scope</span> <span class="k">then</span> <span class="k">super</span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="k">else</span> <span class="err">@</span><span class="nx">compile_root</span><span class="p">(</span><span class="nx">o</span><span class="p">)</span>
+
+  <span class="nv">compile_node: </span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="p">(</span><span class="err">@</span><span class="nx">compile_expression</span><span class="p">(</span><span class="nx">node</span><span class="p">,</span> <span class="nx">merge</span><span class="p">(</span><span class="nx">o</span><span class="p">))</span> <span class="k">for</span> <span class="nx">node</span> <span class="k">in</span> <span class="err">@</span><span class="nx">expressions</span><span class="p">).</span><span class="nx">join</span><span class="p">(</span><span class="s2">&quot;\n&quot;</span><span class="p">)</span></pre></div>             </td>           </tr>                               <tr id="section-22">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-22">#</a>               </div>               <p>If we happen to be the top-level <strong>Expressions</strong>, wrap everything in
+a safety closure, unless requested not to.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">compile_root: </span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="nv">o.indent: </span><span class="err">@</span><span class="nv">tab: </span><span class="k">if</span> <span class="nx">o</span><span class="p">.</span><span class="nx">no_wrap</span> <span class="k">then</span> <span class="s1">&#39;&#39;</span> <span class="k">else</span> <span class="nx">TAB</span>
+    <span class="nv">o.scope: </span><span class="k">new</span> <span class="nx">Scope</span><span class="p">(</span><span class="kc">null</span><span class="p">,</span> <span class="k">this</span><span class="p">,</span> <span class="kc">null</span><span class="p">)</span>
+    <span class="nv">code: </span><span class="k">if</span> <span class="nx">o</span><span class="p">.</span><span class="nx">globals</span> <span class="k">then</span> <span class="err">@</span><span class="nx">compile_node</span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="k">else</span> <span class="err">@</span><span class="nx">compile_with_declarations</span><span class="p">(</span><span class="nx">o</span><span class="p">)</span>
+    <span class="nv">code: </span><span class="nx">code</span><span class="p">.</span><span class="nx">replace</span><span class="p">(</span><span class="nx">TRAILING_WHITESPACE</span><span class="p">,</span> <span class="s1">&#39;&#39;</span><span class="p">)</span>
+    <span class="k">if</span> <span class="nx">o</span><span class="p">.</span><span class="nx">no_wrap</span> <span class="k">then</span> <span class="nx">code</span> <span class="k">else</span> <span class="s2">&quot;(function(){\n$code\n})();\n&quot;</span></pre></div>             </td>           </tr>                               <tr id="section-23">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-23">#</a>               </div>               <p>Compile the expressions body for the contents of a function, with
+declarations of all inner variables pushed up to the top.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">compile_with_declarations: </span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="nv">code: </span><span class="err">@</span><span class="nx">compile_node</span><span class="p">(</span><span class="nx">o</span><span class="p">)</span>
+    <span class="nv">args: </span><span class="err">@</span><span class="nx">contains</span> <span class="p">(</span><span class="nx">node</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="nx">node</span> <span class="k">instanceof</span> <span class="nx">ValueNode</span> <span class="o">and</span> <span class="nx">node</span><span class="p">.</span><span class="nx">is_arguments</span><span class="p">()</span>
+    <span class="nv">code: </span><span class="s2">&quot;${@tab}arguments = Array.prototype.slice.call(arguments, 0);\n$code&quot;</span> <span class="k">if</span> <span class="nx">args</span>
+    <span class="nv">code: </span><span class="s2">&quot;${@tab}var ${o.scope.compiled_assignments()};\n$code&quot;</span>  <span class="k">if</span> <span class="nx">o</span><span class="p">.</span><span class="nx">scope</span><span class="p">.</span><span class="nx">has_assignments</span><span class="p">(</span><span class="k">this</span><span class="p">)</span>
+    <span class="nv">code: </span><span class="s2">&quot;${@tab}var ${o.scope.compiled_declarations()};\n$code&quot;</span> <span class="k">if</span> <span class="nx">o</span><span class="p">.</span><span class="nx">scope</span><span class="p">.</span><span class="nx">has_declarations</span><span class="p">(</span><span class="k">this</span><span class="p">)</span>
+    <span class="nx">code</span></pre></div>             </td>           </tr>                               <tr id="section-24">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-24">#</a>               </div>               <p>Compiles a single expression within the expressions body. If we need to
+return the result, and it's an expression, simply return it. If it's a
+statement, ask the statement to do so.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">compile_expression: </span><span class="p">(</span><span class="nx">node</span><span class="p">,</span> <span class="nx">o</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nv">tab: </span><span class="nx">o</span><span class="p">.</span><span class="nx">indent</span>
+    <span class="nv">stmt: </span>   <span class="nx">node</span><span class="p">.</span><span class="nx">is_statement</span><span class="p">()</span>
+    <span class="nv">returns: </span><span class="nx">del</span><span class="p">(</span><span class="nx">o</span><span class="p">,</span> <span class="s1">&#39;returns&#39;</span><span class="p">)</span> <span class="o">and</span> <span class="err">@</span><span class="nx">is_last</span><span class="p">(</span><span class="nx">node</span><span class="p">)</span> <span class="o">and</span> <span class="o">not</span> <span class="nx">node</span><span class="p">.</span><span class="nx">is_pure_statement</span><span class="p">()</span>
+    <span class="k">return</span> <span class="p">(</span><span class="k">if</span> <span class="nx">stmt</span> <span class="k">then</span> <span class="s1">&#39;&#39;</span> <span class="k">else</span> <span class="err">@</span><span class="nx">idt</span><span class="p">())</span> <span class="o">+</span> <span class="nx">node</span><span class="p">.</span><span class="nx">compile</span><span class="p">(</span><span class="nx">merge</span><span class="p">(</span><span class="nx">o</span><span class="p">,</span> <span class="p">{</span><span class="nv">top: </span><span class="kc">true</span><span class="p">}))</span> <span class="o">+</span> <span class="p">(</span><span class="k">if</span> <span class="nx">stmt</span> <span class="k">then</span> <span class="s1">&#39;&#39;</span> <span class="k">else</span> <span class="s1">&#39;;&#39;</span><span class="p">)</span> <span class="nx">unless</span> <span class="nx">returns</span>
+    <span class="k">return</span> <span class="nx">node</span><span class="p">.</span><span class="nx">compile</span><span class="p">(</span><span class="nx">merge</span><span class="p">(</span><span class="nx">o</span><span class="p">,</span> <span class="p">{</span><span class="nv">returns: </span><span class="kc">true</span><span class="p">}))</span> <span class="k">if</span> <span class="nx">node</span><span class="p">.</span><span class="nx">is_statement</span><span class="p">()</span>
+    <span class="s2">&quot;${@tab}return ${node.compile(o)};&quot;</span></pre></div>             </td>           </tr>                               <tr id="section-25">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-25">#</a>               </div>               <p>Wrap up the given nodes as an <strong>Expressions</strong>, unless it already happens
+to be one.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">Expressions.wrap: </span><span class="p">(</span><span class="nx">nodes</span><span class="p">)</span> <span class="o">-&gt;</span>
+  <span class="k">return</span> <span class="nx">nodes</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="k">if</span> <span class="nx">nodes</span><span class="p">.</span><span class="nx">length</span> <span class="o">is</span> <span class="mi">1</span> <span class="o">and</span> <span class="nx">nodes</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="k">instanceof</span> <span class="nx">Expressions</span>
+  <span class="k">new</span> <span class="nx">Expressions</span><span class="p">(</span><span class="nx">nodes</span><span class="p">)</span>
+
+<span class="nx">statement</span> <span class="nx">Expressions</span></pre></div>             </td>           </tr>                               <tr id="section-26">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-26">#</a>               </div>               <h3>LiteralNode</h3>             </td>             <td class="code">               <div class="highlight"><pre></pre></div>             </td>           </tr>                               <tr id="section-27">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-27">#</a>               </div>               <p>Literals are static values that can be passed through directly into
+JavaScript without translation, such as: strings, numbers,
+<code>true</code>, <code>false</code>, <code>null</code>...</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">exports.LiteralNode: </span><span class="nx">class</span> <span class="nx">LiteralNode</span> <span class="k">extends</span> <span class="nx">BaseNode</span>
+  <span class="nv">type: </span><span class="s1">&#39;Literal&#39;</span>
+
+  <span class="nv">constructor: </span><span class="p">(</span><span class="nx">value</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nv">value: </span><span class="nx">value</span></pre></div>             </td>           </tr>                               <tr id="section-28">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-28">#</a>               </div>               <p>Break and continue must be treated as pure statements -- they lose their
+meaning when wrapped in a closure.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">is_statement: </span><span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nx">value</span> <span class="o">is</span> <span class="s1">&#39;break&#39;</span> <span class="o">or</span> <span class="err">@</span><span class="nx">value</span> <span class="o">is</span> <span class="s1">&#39;continue&#39;</span>
+  <span class="nv">is_pure_statement: </span><span class="nx">LiteralNode</span><span class="o">::</span><span class="nx">is_statement</span>
+
+  <span class="nv">compile_node: </span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="nv">idt: </span><span class="k">if</span> <span class="err">@</span><span class="nx">is_statement</span><span class="p">()</span> <span class="k">then</span> <span class="err">@</span><span class="nx">idt</span><span class="p">()</span> <span class="k">else</span> <span class="s1">&#39;&#39;</span>
+    <span class="nv">end: </span><span class="k">if</span> <span class="err">@</span><span class="nx">is_statement</span><span class="p">()</span> <span class="k">then</span> <span class="s1">&#39;;&#39;</span> <span class="k">else</span> <span class="s1">&#39;&#39;</span>
+    <span class="s2">&quot;$idt$@value$end&quot;</span>
+
+  <span class="nv">toString: </span><span class="p">(</span><span class="nx">idt</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="s2">&quot; \&quot;$@value\&quot;&quot;</span></pre></div>             </td>           </tr>                               <tr id="section-29">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-29">#</a>               </div>               <h3>ReturnNode</h3>             </td>             <td class="code">               <div class="highlight"><pre></pre></div>             </td>           </tr>                               <tr id="section-30">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-30">#</a>               </div>               <p>A <code>return</code> is a <em>pure_statement</em> -- wrapping it in a closure wouldn't
+make sense.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">exports.ReturnNode: </span><span class="nx">class</span> <span class="nx">ReturnNode</span> <span class="k">extends</span> <span class="nx">BaseNode</span>
+  <span class="nv">type: </span><span class="s1">&#39;Return&#39;</span>
+
+  <span class="nv">constructor: </span><span class="p">(</span><span class="nx">expression</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nv">children: </span><span class="p">[</span><span class="err">@</span><span class="nv">expression: </span><span class="nx">expression</span><span class="p">]</span>
+
+  <span class="nv">compile_node: </span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="k">return</span> <span class="err">@</span><span class="nx">expression</span><span class="p">.</span><span class="nx">compile</span><span class="p">(</span><span class="nx">merge</span><span class="p">(</span><span class="nx">o</span><span class="p">,</span> <span class="p">{</span><span class="nv">returns: </span><span class="kc">true</span><span class="p">}))</span> <span class="k">if</span> <span class="err">@</span><span class="nx">expression</span><span class="p">.</span><span class="nx">is_statement</span><span class="p">()</span>
+    <span class="s2">&quot;${@tab}return ${@expression.compile(o)};&quot;</span>
+
+<span class="nx">statement</span> <span class="nx">ReturnNode</span><span class="p">,</span> <span class="kc">true</span></pre></div>             </td>           </tr>                               <tr id="section-31">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-31">#</a>               </div>               <h3>ValueNode</h3>             </td>             <td class="code">               <div class="highlight"><pre></pre></div>             </td>           </tr>                               <tr id="section-32">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-32">#</a>               </div>               <p>A value, variable or literal or parenthesized, indexed or dotted into,
+or vanilla.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">exports.ValueNode: </span><span class="nx">class</span> <span class="nx">ValueNode</span> <span class="k">extends</span> <span class="nx">BaseNode</span>
+  <span class="nv">type: </span><span class="s1">&#39;Value&#39;</span>
+
+  <span class="nv">SOAK: </span><span class="s2">&quot; == undefined ? undefined : &quot;</span></pre></div>             </td>           </tr>                               <tr id="section-33">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-33">#</a>               </div>               <p>A <strong>ValueNode</strong> has a base and a list of property accesses.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">constructor: </span><span class="p">(</span><span class="nx">base</span><span class="p">,</span> <span class="nx">properties</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nv">children: </span>  <span class="nx">flatten</span> <span class="p">[</span><span class="err">@</span><span class="nv">base: </span><span class="nx">base</span><span class="p">,</span> <span class="err">@</span><span class="nv">properties: </span><span class="p">(</span><span class="nx">properties</span> <span class="o">or</span> <span class="p">[])]</span></pre></div>             </td>           </tr>                               <tr id="section-34">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-34">#</a>               </div>               <p>Add a property access to the list.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">push: </span><span class="p">(</span><span class="nx">prop</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nx">properties</span><span class="p">.</span><span class="nx">push</span><span class="p">(</span><span class="nx">prop</span><span class="p">)</span>
+    <span class="err">@</span><span class="nx">children</span><span class="p">.</span><span class="nx">push</span><span class="p">(</span><span class="nx">prop</span><span class="p">)</span>
+    <span class="k">this</span>
+
+  <span class="nv">operation_sensitive: </span><span class="o">-&gt;</span>
+    <span class="kc">true</span>
+
+  <span class="nv">has_properties: </span><span class="o">-&gt;</span>
+    <span class="o">!!</span><span class="err">@</span><span class="nx">properties</span><span class="p">.</span><span class="nx">length</span></pre></div>             </td>           </tr>                               <tr id="section-35">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-35">#</a>               </div>               <p>Some boolean checks for the benefit of other nodes.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">is_array: </span><span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nx">base</span> <span class="k">instanceof</span> <span class="nx">ArrayNode</span> <span class="o">and</span> <span class="o">not</span> <span class="err">@</span><span class="nx">has_properties</span><span class="p">()</span>
+
+  <span class="nv">is_object: </span><span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nx">base</span> <span class="k">instanceof</span> <span class="nx">ObjectNode</span> <span class="o">and</span> <span class="o">not</span> <span class="err">@</span><span class="nx">has_properties</span><span class="p">()</span>
+
+  <span class="nv">is_splice: </span><span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nx">has_properties</span><span class="p">()</span> <span class="o">and</span> <span class="err">@</span><span class="nx">properties</span><span class="p">[</span><span class="err">@</span><span class="nx">properties</span><span class="p">.</span><span class="nx">length</span> <span class="o">-</span> <span class="mi">1</span><span class="p">]</span> <span class="k">instanceof</span> <span class="nx">SliceNode</span>
+
+  <span class="nv">is_arguments: </span><span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nx">base</span><span class="p">.</span><span class="nx">value</span> <span class="o">is</span> <span class="s1">&#39;arguments&#39;</span></pre></div>             </td>           </tr>                               <tr id="section-36">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-36">#</a>               </div>               <p>The value can be unwrapped as its inner node, if there are no attached
+properties.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">unwrap: </span><span class="o">-&gt;</span>
+    <span class="k">if</span> <span class="err">@</span><span class="nx">properties</span><span class="p">.</span><span class="nx">length</span> <span class="k">then</span> <span class="k">this</span> <span class="k">else</span> <span class="err">@</span><span class="nx">base</span></pre></div>             </td>           </tr>                               <tr id="section-37">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-37">#</a>               </div>               <p>Values are considered to be statements if their base is a statement.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">is_statement: </span><span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nx">base</span><span class="p">.</span><span class="nx">is_statement</span> <span class="o">and</span> <span class="err">@</span><span class="nx">base</span><span class="p">.</span><span class="nx">is_statement</span><span class="p">()</span> <span class="o">and</span> <span class="o">not</span> <span class="err">@</span><span class="nx">has_properties</span><span class="p">()</span></pre></div>             </td>           </tr>                               <tr id="section-38">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-38">#</a>               </div>               <p>We compile a value to JavaScript by compiling and joining each property.
+Things get much more insteresting if the chain of properties has <em>soak</em>
+operators <code>?.</code> interspersed. Then we have to take care not to accidentally
+evaluate a anything twice when building the soak chain.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">compile_node: </span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="nv">soaked: </span>  <span class="kc">false</span>
+    <span class="nv">only: </span>    <span class="nx">del</span><span class="p">(</span><span class="nx">o</span><span class="p">,</span> <span class="s1">&#39;only_first&#39;</span><span class="p">)</span>
+    <span class="nv">op: </span>      <span class="nx">del</span><span class="p">(</span><span class="nx">o</span><span class="p">,</span> <span class="s1">&#39;operation&#39;</span><span class="p">)</span>
+    <span class="nv">props: </span>   <span class="k">if</span> <span class="nx">only</span> <span class="k">then</span> <span class="err">@</span><span class="nx">properties</span><span class="p">[</span><span class="mi">0</span><span class="p">...</span><span class="err">@</span><span class="nx">properties</span><span class="p">.</span><span class="nx">length</span> <span class="o">-</span> <span class="mi">1</span><span class="p">]</span> <span class="k">else</span> <span class="err">@</span><span class="nx">properties</span>
+    <span class="nv">baseline: </span><span class="err">@</span><span class="nx">base</span><span class="p">.</span><span class="nx">compile</span> <span class="nx">o</span>
+    <span class="nv">baseline: </span><span class="s2">&quot;($baseline)&quot;</span> <span class="k">if</span> <span class="err">@</span><span class="nx">base</span> <span class="k">instanceof</span> <span class="nx">ObjectNode</span> <span class="o">and</span> <span class="err">@</span><span class="nx">has_properties</span><span class="p">()</span>
+    <span class="nv">complete: </span><span class="err">@</span><span class="nv">last: </span><span class="nx">baseline</span>
+
+    <span class="k">for</span> <span class="nx">prop</span> <span class="k">in</span> <span class="nx">props</span>
+      <span class="err">@</span><span class="nv">source: </span><span class="nx">baseline</span>
+      <span class="k">if</span> <span class="nx">prop</span><span class="p">.</span><span class="nx">soak_node</span>
+        <span class="nv">soaked: </span><span class="kc">true</span>
+        <span class="k">if</span> <span class="err">@</span><span class="nx">base</span> <span class="k">instanceof</span> <span class="nx">CallNode</span> <span class="o">and</span> <span class="nx">prop</span> <span class="o">is</span> <span class="nx">props</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
+          <span class="nv">temp: </span><span class="nx">o</span><span class="p">.</span><span class="nx">scope</span><span class="p">.</span><span class="nx">free_variable</span><span class="p">()</span>
+          <span class="nv">complete: </span><span class="s2">&quot;($temp = $complete)$@SOAK&quot;</span> <span class="o">+</span> <span class="p">(</span><span class="nv">baseline: </span><span class="nx">temp</span> <span class="o">+</span> <span class="nx">prop</span><span class="p">.</span><span class="nx">compile</span><span class="p">(</span><span class="nx">o</span><span class="p">))</span>
+        <span class="k">else</span>
+          <span class="nv">complete: </span><span class="nx">complete</span> <span class="o">+</span> <span class="err">@</span><span class="nx">SOAK</span> <span class="o">+</span> <span class="p">(</span><span class="nx">baseline</span> <span class="o">+=</span> <span class="nx">prop</span><span class="p">.</span><span class="nx">compile</span><span class="p">(</span><span class="nx">o</span><span class="p">))</span>
+      <span class="k">else</span>
+        <span class="nv">part: </span><span class="nx">prop</span><span class="p">.</span><span class="nx">compile</span><span class="p">(</span><span class="nx">o</span><span class="p">)</span>
+        <span class="nx">baseline</span> <span class="o">+=</span> <span class="nx">part</span>
+        <span class="nx">complete</span> <span class="o">+=</span> <span class="nx">part</span>
+        <span class="err">@</span><span class="nv">last: </span><span class="nx">part</span>
+
+    <span class="k">if</span> <span class="nx">op</span> <span class="o">and</span> <span class="nx">soaked</span> <span class="k">then</span> <span class="s2">&quot;($complete)&quot;</span> <span class="k">else</span> <span class="nx">complete</span></pre></div>             </td>           </tr>                               <tr id="section-39">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-39">#</a>               </div>               <h3>CommentNode</h3>             </td>             <td class="code">               <div class="highlight"><pre></pre></div>             </td>           </tr>                               <tr id="section-40">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-40">#</a>               </div>               <p>CoffeeScript passes through comments as JavaScript comments at the
+same position.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">exports.CommentNode: </span><span class="nx">class</span> <span class="nx">CommentNode</span> <span class="k">extends</span> <span class="nx">BaseNode</span>
+  <span class="nv">type: </span><span class="s1">&#39;Comment&#39;</span>
+
+  <span class="nv">constructor: </span><span class="p">(</span><span class="nx">lines</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nv">lines: </span><span class="nx">lines</span>
+    <span class="k">this</span>
+
+  <span class="nv">compile_node: </span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="s2">&quot;$@tab//&quot;</span> <span class="o">+</span> <span class="err">@</span><span class="nx">lines</span><span class="p">.</span><span class="nx">join</span><span class="p">(</span><span class="s2">&quot;\n$@tab//&quot;</span><span class="p">)</span>
+
+<span class="nx">statement</span> <span class="nx">CommentNode</span></pre></div>             </td>           </tr>                               <tr id="section-41">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-41">#</a>               </div>               <h3>CallNode</h3>             </td>             <td class="code">               <div class="highlight"><pre></pre></div>             </td>           </tr>                               <tr id="section-42">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-42">#</a>               </div>               <p>Node for a function invocation. Takes care of converting <code>super()</code> calls into
+calls against the prototype's function of the same name.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">exports.CallNode: </span><span class="nx">class</span> <span class="nx">CallNode</span> <span class="k">extends</span> <span class="nx">BaseNode</span>
+  <span class="nv">type: </span><span class="s1">&#39;Call&#39;</span>
+
+  <span class="nv">constructor: </span><span class="p">(</span><span class="nx">variable</span><span class="p">,</span> <span class="nx">args</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nv">children: </span> <span class="nx">flatten</span> <span class="p">[</span><span class="err">@</span><span class="nv">variable: </span><span class="nx">variable</span><span class="p">,</span> <span class="err">@</span><span class="nv">args: </span><span class="p">(</span><span class="nx">args</span> <span class="o">or</span> <span class="p">[])]</span>
+    <span class="err">@</span><span class="nv">prefix: </span>   <span class="s1">&#39;&#39;</span></pre></div>             </td>           </tr>                               <tr id="section-43">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-43">#</a>               </div>               <p>Tag this invocation as creating a new instance.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">new_instance: </span><span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nv">prefix: </span><span class="s1">&#39;new &#39;</span>
+    <span class="k">this</span></pre></div>             </td>           </tr>                               <tr id="section-44">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-44">#</a>               </div>               <p>Add an argument to the call's arugment list.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">push: </span><span class="p">(</span><span class="nx">arg</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nx">args</span><span class="p">.</span><span class="nx">push</span><span class="p">(</span><span class="nx">arg</span><span class="p">)</span>
+    <span class="err">@</span><span class="nx">children</span><span class="p">.</span><span class="nx">push</span><span class="p">(</span><span class="nx">arg</span><span class="p">)</span>
+    <span class="k">this</span></pre></div>             </td>           </tr>                               <tr id="section-45">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-45">#</a>               </div>               <p>Compile a vanilla function call.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">compile_node: </span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="k">return</span> <span class="err">@</span><span class="nx">compile_splat</span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="k">if</span> <span class="err">@</span><span class="nx">args</span><span class="p">[</span><span class="err">@</span><span class="nx">args</span><span class="p">.</span><span class="nx">length</span> <span class="o">-</span> <span class="mi">1</span><span class="p">]</span> <span class="k">instanceof</span> <span class="nx">SplatNode</span>
+    <span class="nv">args: </span><span class="p">(</span><span class="nx">arg</span><span class="p">.</span><span class="nx">compile</span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="k">for</span> <span class="nx">arg</span> <span class="k">in</span> <span class="err">@</span><span class="nx">args</span><span class="p">).</span><span class="nx">join</span><span class="p">(</span><span class="s1">&#39;, &#39;</span><span class="p">)</span>
+    <span class="k">return</span> <span class="err">@</span><span class="nx">compile_super</span><span class="p">(</span><span class="nx">args</span><span class="p">,</span> <span class="nx">o</span><span class="p">)</span> <span class="k">if</span> <span class="err">@</span><span class="nx">variable</span> <span class="o">is</span> <span class="s1">&#39;super&#39;</span>
+    <span class="s2">&quot;$@prefix${@variable.compile(o)}($args)&quot;</span></pre></div>             </td>           </tr>                               <tr id="section-46">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-46">#</a>               </div>               <p><code>super()</code> is converted into a call against the superclass's implementation
+of the current function.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">compile_super: </span><span class="p">(</span><span class="nx">args</span><span class="p">,</span> <span class="nx">o</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="nv">methname: </span><span class="nx">o</span><span class="p">.</span><span class="nx">scope</span><span class="p">.</span><span class="nx">method</span><span class="p">.</span><span class="nx">name</span>
+    <span class="nv">meth: </span><span class="k">if</span> <span class="nx">o</span><span class="p">.</span><span class="nx">scope</span><span class="p">.</span><span class="nx">method</span><span class="p">.</span><span class="nx">proto</span>
+      <span class="s2">&quot;${o.scope.method.proto}.__superClass__.$methname&quot;</span>
+    <span class="k">else</span>
+      <span class="s2">&quot;${methname}.__superClass__.constructor&quot;</span>
+    <span class="s2">&quot;${meth}.call(this${ if args.length then &#39;, &#39; else &#39;&#39; }$args)&quot;</span></pre></div>             </td>           </tr>                               <tr id="section-47">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-47">#</a>               </div>               <p>If you call a function with a splat, it's converted into a JavaScript
+<code>.apply()</code> call to allow the variable-length arguments.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">compile_splat: </span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="nv">meth: </span><span class="err">@</span><span class="nx">variable</span><span class="p">.</span><span class="nx">compile</span> <span class="nx">o</span>
+    <span class="nv">obj: </span> <span class="err">@</span><span class="nx">variable</span><span class="p">.</span><span class="nx">source</span> <span class="o">or</span> <span class="s1">&#39;this&#39;</span>
+    <span class="k">if</span> <span class="nx">obj</span><span class="p">.</span><span class="nx">match</span><span class="p">(</span><span class="sr">/\(/</span><span class="p">)</span>
+      <span class="nv">temp: </span><span class="nx">o</span><span class="p">.</span><span class="nx">scope</span><span class="p">.</span><span class="nx">free_variable</span><span class="p">()</span>
+      <span class="nv">obj: </span> <span class="nx">temp</span>
+      <span class="nv">meth: </span><span class="s2">&quot;($temp = ${ @variable.source })${ @variable.last }&quot;</span>
+    <span class="nv">args: </span><span class="k">for</span> <span class="nx">arg</span><span class="p">,</span> <span class="nx">i</span> <span class="k">in</span> <span class="err">@</span><span class="nx">args</span>
+      <span class="nv">code: </span><span class="nx">arg</span><span class="p">.</span><span class="nx">compile</span> <span class="nx">o</span>
+      <span class="nv">code: </span><span class="k">if</span> <span class="nx">arg</span> <span class="k">instanceof</span> <span class="nx">SplatNode</span> <span class="k">then</span> <span class="nx">code</span> <span class="k">else</span> <span class="s2">&quot;[$code]&quot;</span>
+      <span class="k">if</span> <span class="nx">i</span> <span class="o">is</span> <span class="mi">0</span> <span class="k">then</span> <span class="nx">code</span> <span class="k">else</span> <span class="s2">&quot;.concat($code)&quot;</span>
+    <span class="s2">&quot;$@prefix${meth}.apply($obj, ${ args.join(&#39;&#39;) })&quot;</span></pre></div>             </td>           </tr>                               <tr id="section-48">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-48">#</a>               </div>               <h3>ExtendsNode</h3>             </td>             <td class="code">               <div class="highlight"><pre></pre></div>             </td>           </tr>                               <tr id="section-49">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-49">#</a>               </div>               <p>Node to extend an object's prototype with an ancestor object.
+After <code>goog.inherits</code> from the
+<a href="http://closure-library.googlecode.com/svn/docs/closure_goog_base.js.html">Closure Library</a>.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">exports.ExtendsNode: </span><span class="nx">class</span> <span class="nx">ExtendsNode</span> <span class="k">extends</span> <span class="nx">BaseNode</span>
+  <span class="nv">type: </span><span class="s1">&#39;Extends&#39;</span>
+
+  <span class="nv">code: </span><span class="s1">&#39;&#39;&#39;</span>
+<span class="s1">        function(child, parent) {</span>
+<span class="s1">            var ctor = function(){ };</span>
+<span class="s1">            ctor.prototype = parent.prototype;</span>
+<span class="s1">            child.__superClass__ = parent.prototype;</span>
+<span class="s1">            child.prototype = new ctor();</span>
+<span class="s1">            child.prototype.constructor = child;</span>
+<span class="s1">          }</span>
+<span class="s1">        &#39;&#39;&#39;</span>
+
+  <span class="nv">constructor: </span><span class="p">(</span><span class="nx">child</span><span class="p">,</span> <span class="nx">parent</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nv">children: </span> <span class="p">[</span><span class="err">@</span><span class="nv">child: </span><span class="nx">child</span><span class="p">,</span> <span class="err">@</span><span class="nv">parent: </span><span class="nx">parent</span><span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-50">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-50">#</a>               </div>               <p>Hooks one constructor into another's prototype chain.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">compile_node: </span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="nx">o</span><span class="p">.</span><span class="nx">scope</span><span class="p">.</span><span class="nx">assign</span><span class="p">(</span><span class="s1">&#39;__extends&#39;</span><span class="p">,</span> <span class="err">@</span><span class="nx">code</span><span class="p">,</span> <span class="kc">true</span><span class="p">)</span>
+    <span class="nv">ref: </span> <span class="k">new</span> <span class="nx">ValueNode</span> <span class="nx">literal</span><span class="p">(</span><span class="s1">&#39;__extends&#39;</span><span class="p">)</span>
+    <span class="nv">call: </span><span class="k">new</span> <span class="nx">CallNode</span> <span class="nx">ref</span><span class="p">,</span> <span class="p">[</span><span class="err">@</span><span class="nx">child</span><span class="p">,</span> <span class="err">@</span><span class="nx">parent</span><span class="p">]</span>
+    <span class="nx">call</span><span class="p">.</span><span class="nx">compile</span><span class="p">(</span><span class="nx">o</span><span class="p">)</span></pre></div>             </td>           </tr>                               <tr id="section-51">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-51">#</a>               </div>               <h3>AccessorNode</h3>             </td>             <td class="code">               <div class="highlight"><pre></pre></div>             </td>           </tr>                               <tr id="section-52">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-52">#</a>               </div>               <p>A <code>.</code> accessor into a property of a value, or the <code>::</code> shorthand for
+an accessor into the object's prototype.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">exports.AccessorNode: </span><span class="nx">class</span> <span class="nx">AccessorNode</span> <span class="k">extends</span> <span class="nx">BaseNode</span>
+  <span class="nv">type: </span><span class="s1">&#39;Accessor&#39;</span>
+
+  <span class="nv">constructor: </span><span class="p">(</span><span class="nx">name</span><span class="p">,</span> <span class="nx">tag</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nv">children: </span> <span class="p">[</span><span class="err">@</span><span class="nv">name: </span><span class="nx">name</span><span class="p">]</span>
+    <span class="err">@</span><span class="nv">prototype: </span><span class="nx">tag</span> <span class="o">is</span> <span class="s1">&#39;prototype&#39;</span>
+    <span class="err">@</span><span class="nv">soak_node: </span><span class="nx">tag</span> <span class="o">is</span> <span class="s1">&#39;soak&#39;</span>
+    <span class="k">this</span>
+
+  <span class="nv">compile_node: </span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="s1">&#39;.&#39;</span> <span class="o">+</span> <span class="p">(</span><span class="k">if</span> <span class="err">@</span><span class="nx">prototype</span> <span class="k">then</span> <span class="s1">&#39;prototype.&#39;</span> <span class="k">else</span> <span class="s1">&#39;&#39;</span><span class="p">)</span> <span class="o">+</span> <span class="err">@</span><span class="nx">name</span><span class="p">.</span><span class="nx">compile</span><span class="p">(</span><span class="nx">o</span><span class="p">)</span></pre></div>             </td>           </tr>                               <tr id="section-53">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-53">#</a>               </div>               <h3>IndexNode</h3>             </td>             <td class="code">               <div class="highlight"><pre></pre></div>             </td>           </tr>                               <tr id="section-54">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-54">#</a>               </div>               <p>An indexed accessor into an array or object.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">exports.IndexNode: </span><span class="nx">class</span> <span class="nx">IndexNode</span> <span class="k">extends</span> <span class="nx">BaseNode</span>
+  <span class="nv">type: </span><span class="s1">&#39;Index&#39;</span>
+
+  <span class="nv">constructor: </span><span class="p">(</span><span class="nx">index</span><span class="p">,</span> <span class="nx">tag</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nv">children: </span> <span class="p">[</span><span class="err">@</span><span class="nv">index: </span><span class="nx">index</span><span class="p">]</span>
+    <span class="err">@</span><span class="nv">soak_node: </span><span class="nx">tag</span> <span class="o">is</span> <span class="s1">&#39;soak&#39;</span>
+
+  <span class="nv">compile_node: </span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="nv">idx: </span><span class="err">@</span><span class="nx">index</span><span class="p">.</span><span class="nx">compile</span> <span class="nx">o</span>
+    <span class="s2">&quot;[$idx]&quot;</span></pre></div>             </td>           </tr>                               <tr id="section-55">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-55">#</a>               </div>               <h3>RangeNode</h3>             </td>             <td class="code">               <div class="highlight"><pre></pre></div>             </td>           </tr>                               <tr id="section-56">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-56">#</a>               </div>               <p>A range literal. Ranges can be used to extract portions (slices) of arrays,
+to specify a range for comprehensions, or as a value, to be expanded into the
+corresponding array of integers at runtime.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">exports.RangeNode: </span><span class="nx">class</span> <span class="nx">RangeNode</span> <span class="k">extends</span> <span class="nx">BaseNode</span>
+  <span class="nv">type: </span><span class="s1">&#39;Range&#39;</span>
+
+  <span class="nv">constructor: </span><span class="p">(</span><span class="nx">from</span><span class="p">,</span> <span class="nx">to</span><span class="p">,</span> <span class="nx">exclusive</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nv">children: </span> <span class="p">[</span><span class="err">@</span><span class="nv">from: </span><span class="nx">from</span><span class="p">,</span> <span class="err">@</span><span class="nv">to: </span><span class="nx">to</span><span class="p">]</span>
+    <span class="err">@</span><span class="nv">exclusive: </span><span class="o">!!</span><span class="nx">exclusive</span></pre></div>             </td>           </tr>                               <tr id="section-57">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-57">#</a>               </div>               <p>Compiles the range's source variables -- where it starts and where it ends.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">compile_variables: </span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nv">tab: </span><span class="nx">o</span><span class="p">.</span><span class="nx">indent</span>
+    <span class="p">[</span><span class="err">@</span><span class="nx">from_var</span><span class="p">,</span> <span class="err">@</span><span class="nx">to_var</span><span class="p">]</span><span class="o">:</span> <span class="p">[</span><span class="nx">o</span><span class="p">.</span><span class="nx">scope</span><span class="p">.</span><span class="nx">free_variable</span><span class="p">(),</span> <span class="nx">o</span><span class="p">.</span><span class="nx">scope</span><span class="p">.</span><span class="nx">free_variable</span><span class="p">()]</span>
+    <span class="p">[</span><span class="nx">from</span><span class="p">,</span> <span class="nx">to</span><span class="p">]</span><span class="o">:</span>           <span class="p">[</span><span class="err">@</span><span class="nx">from</span><span class="p">.</span><span class="nx">compile</span><span class="p">(</span><span class="nx">o</span><span class="p">),</span> <span class="err">@</span><span class="nx">to</span><span class="p">.</span><span class="nx">compile</span><span class="p">(</span><span class="nx">o</span><span class="p">)]</span>
+    <span class="s2">&quot;$@from_var = $from; $@to_var = $to;\n$@tab&quot;</span></pre></div>             </td>           </tr>                               <tr id="section-58">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-58">#</a>               </div>               <p>When compiled normally, the range returns the contents of the <em>for loop</em>
+needed to iterate over the values in the range. Used by comprehensions.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">compile_node: </span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="k">return</span>    <span class="err">@</span><span class="nx">compile_array</span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="nx">unless</span> <span class="nx">o</span><span class="p">.</span><span class="nx">index</span>
+    <span class="nv">idx: </span>     <span class="nx">del</span> <span class="nx">o</span><span class="p">,</span> <span class="s1">&#39;index&#39;</span>
+    <span class="nv">step: </span>    <span class="nx">del</span> <span class="nx">o</span><span class="p">,</span> <span class="s1">&#39;step&#39;</span>
+    <span class="nv">vars: </span>    <span class="s2">&quot;$idx = $@from_var&quot;</span>
+    <span class="nv">step: </span>    <span class="k">if</span> <span class="nx">step</span> <span class="k">then</span> <span class="nx">step</span><span class="p">.</span><span class="nx">compile</span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="k">else</span> <span class="s1">&#39;1&#39;</span>
+    <span class="nv">equals: </span>  <span class="k">if</span> <span class="err">@</span><span class="nx">exclusive</span> <span class="k">then</span> <span class="s1">&#39;&#39;</span> <span class="k">else</span> <span class="s1">&#39;=&#39;</span>
+    <span class="nv">intro: </span>   <span class="s2">&quot;($@from_var &lt;= $@to_var ? $idx&quot;</span>
+    <span class="nv">compare: </span> <span class="s2">&quot;$intro &lt;$equals $@to_var : $idx &gt;$equals $@to_var)&quot;</span>
+    <span class="nv">incr: </span>    <span class="s2">&quot;$intro += $step : $idx -= $step)&quot;</span>
+    <span class="s2">&quot;$vars; $compare; $incr&quot;</span></pre></div>             </td>           </tr>                               <tr id="section-59">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-59">#</a>               </div>               <p>When used as a value, expand the range into the equivalent array. In the
+future, the code this generates should probably be cleaned up by handwriting
+it instead of wrapping nodes.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">compile_array: </span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="nv">name: </span><span class="nx">o</span><span class="p">.</span><span class="nx">scope</span><span class="p">.</span><span class="nx">free_variable</span><span class="p">()</span>
+    <span class="nv">body: </span><span class="nx">Expressions</span><span class="p">.</span><span class="nx">wrap</span><span class="p">([</span><span class="nx">literal</span><span class="p">(</span><span class="nx">name</span><span class="p">)])</span>
+    <span class="nv">arr: </span> <span class="nx">Expressions</span><span class="p">.</span><span class="nx">wrap</span><span class="p">([</span><span class="k">new</span> <span class="nx">ForNode</span><span class="p">(</span><span class="nx">body</span><span class="p">,</span> <span class="p">{</span><span class="nv">source: </span><span class="p">(</span><span class="k">new</span> <span class="nx">ValueNode</span><span class="p">(</span><span class="k">this</span><span class="p">))},</span> <span class="nx">literal</span><span class="p">(</span><span class="nx">name</span><span class="p">))])</span>
+    <span class="p">(</span><span class="k">new</span> <span class="nx">ParentheticalNode</span><span class="p">(</span><span class="k">new</span> <span class="nx">CallNode</span><span class="p">(</span><span class="k">new</span> <span class="nx">CodeNode</span><span class="p">([],</span> <span class="nx">arr</span><span class="p">)))).</span><span class="nx">compile</span><span class="p">(</span><span class="nx">o</span><span class="p">)</span></pre></div>             </td>           </tr>                               <tr id="section-60">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-60">#</a>               </div>               <h3>SliceNode</h3>             </td>             <td class="code">               <div class="highlight"><pre></pre></div>             </td>           </tr>                               <tr id="section-61">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-61">#</a>               </div>               <p>An array slice literal. Unlike JavaScript's <code>Array#slice</code>, the second parameter
+specifies the index of the end of the slice, just as the first parameter
+is the index of the beginning.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">exports.SliceNode: </span><span class="nx">class</span> <span class="nx">SliceNode</span> <span class="k">extends</span> <span class="nx">BaseNode</span>
+  <span class="nv">type: </span><span class="s1">&#39;Slice&#39;</span>
+
+  <span class="nv">constructor: </span><span class="p">(</span><span class="nx">range</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nv">children: </span><span class="p">[</span><span class="err">@</span><span class="nv">range: </span><span class="nx">range</span><span class="p">]</span>
+    <span class="k">this</span>
+
+  <span class="nv">compile_node: </span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="nv">from: </span>      <span class="err">@</span><span class="nx">range</span><span class="p">.</span><span class="nx">from</span><span class="p">.</span><span class="nx">compile</span><span class="p">(</span><span class="nx">o</span><span class="p">)</span>
+    <span class="nv">to: </span>        <span class="err">@</span><span class="nx">range</span><span class="p">.</span><span class="nx">to</span><span class="p">.</span><span class="nx">compile</span><span class="p">(</span><span class="nx">o</span><span class="p">)</span>
+    <span class="nv">plus_part: </span> <span class="k">if</span> <span class="err">@</span><span class="nx">range</span><span class="p">.</span><span class="nx">exclusive</span> <span class="k">then</span> <span class="s1">&#39;&#39;</span> <span class="k">else</span> <span class="s1">&#39; + 1&#39;</span>
+    <span class="s2">&quot;.slice($from, $to$plus_part)&quot;</span></pre></div>             </td>           </tr>                               <tr id="section-62">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-62">#</a>               </div>               <h3>ObjectNode</h3>             </td>             <td class="code">               <div class="highlight"><pre></pre></div>             </td>           </tr>                               <tr id="section-63">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-63">#</a>               </div>               <p>An object literal, nothing fancy.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">exports.ObjectNode: </span><span class="nx">class</span> <span class="nx">ObjectNode</span> <span class="k">extends</span> <span class="nx">BaseNode</span>
+  <span class="nv">type: </span><span class="s1">&#39;Object&#39;</span>
+
+  <span class="nv">constructor: </span><span class="p">(</span><span class="nx">props</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nv">children: </span><span class="err">@</span><span class="nv">objects: </span><span class="err">@</span><span class="nv">properties: </span><span class="nx">props</span> <span class="o">or</span> <span class="p">[]</span></pre></div>             </td>           </tr>                               <tr id="section-64">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-64">#</a>               </div>               <p>All the mucking about with commas is to make sure that CommentNodes and
+AssignNodes get interleaved correctly, with no trailing commas or
+commas affixed to comments.</p>
+
+<p><em>TODO: Extract this and add it to ArrayNode</em>.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">compile_node: </span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="nv">o.indent: </span><span class="err">@</span><span class="nx">idt</span><span class="p">(</span><span class="mi">1</span><span class="p">)</span>
+    <span class="nv">non_comments: </span><span class="nx">prop</span> <span class="k">for</span> <span class="nx">prop</span> <span class="k">in</span> <span class="err">@</span><span class="nx">properties</span> <span class="k">when</span> <span class="o">not</span> <span class="p">(</span><span class="nx">prop</span> <span class="k">instanceof</span> <span class="nx">CommentNode</span><span class="p">)</span>
+    <span class="nv">last_noncom: </span> <span class="nx">non_comments</span><span class="p">[</span><span class="nx">non_comments</span><span class="p">.</span><span class="nx">length</span> <span class="o">-</span> <span class="mi">1</span><span class="p">]</span>
+    <span class="nv">props: </span><span class="k">for</span> <span class="nx">prop</span><span class="p">,</span> <span class="nx">i</span> <span class="k">in</span> <span class="err">@</span><span class="nx">properties</span>
+      <span class="nv">join: </span>  <span class="s2">&quot;,\n&quot;</span>
+      <span class="nv">join: </span>  <span class="s2">&quot;\n&quot;</span> <span class="k">if</span> <span class="p">(</span><span class="nx">prop</span> <span class="o">is</span> <span class="nx">last_noncom</span><span class="p">)</span> <span class="o">or</span> <span class="p">(</span><span class="nx">prop</span> <span class="k">instanceof</span> <span class="nx">CommentNode</span><span class="p">)</span>
+      <span class="nv">join: </span>  <span class="s1">&#39;&#39;</span> <span class="k">if</span> <span class="nx">i</span> <span class="o">is</span> <span class="err">@</span><span class="nx">properties</span><span class="p">.</span><span class="nx">length</span> <span class="o">-</span> <span class="mi">1</span>
+      <span class="nv">indent: </span><span class="k">if</span> <span class="nx">prop</span> <span class="k">instanceof</span> <span class="nx">CommentNode</span> <span class="k">then</span> <span class="s1">&#39;&#39;</span> <span class="k">else</span> <span class="err">@</span><span class="nx">idt</span><span class="p">(</span><span class="mi">1</span><span class="p">)</span>
+      <span class="nx">indent</span> <span class="o">+</span> <span class="nx">prop</span><span class="p">.</span><span class="nx">compile</span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="o">+</span> <span class="nx">join</span>
+    <span class="nv">props: </span><span class="nx">props</span><span class="p">.</span><span class="nx">join</span><span class="p">(</span><span class="s1">&#39;&#39;</span><span class="p">)</span>
+    <span class="nv">inner: </span><span class="k">if</span> <span class="nx">props</span> <span class="k">then</span> <span class="s1">&#39;\n&#39;</span> <span class="o">+</span> <span class="nx">props</span> <span class="o">+</span> <span class="s1">&#39;\n&#39;</span> <span class="o">+</span> <span class="err">@</span><span class="nx">idt</span><span class="p">()</span> <span class="k">else</span> <span class="s1">&#39;&#39;</span>
+    <span class="s2">&quot;{$inner}&quot;</span></pre></div>             </td>           </tr>                               <tr id="section-65">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-65">#</a>               </div>               <h3>ArrayNode</h3>             </td>             <td class="code">               <div class="highlight"><pre></pre></div>             </td>           </tr>                               <tr id="section-66">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-66">#</a>               </div>               <p>An array literal.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">exports.ArrayNode: </span><span class="nx">class</span> <span class="nx">ArrayNode</span> <span class="k">extends</span> <span class="nx">BaseNode</span>
+  <span class="nv">type: </span><span class="s1">&#39;Array&#39;</span>
+
+  <span class="nv">constructor: </span><span class="p">(</span><span class="nx">objects</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nv">children: </span><span class="err">@</span><span class="nv">objects: </span><span class="nx">objects</span> <span class="o">or</span> <span class="p">[]</span>
+
+  <span class="nv">compile_node: </span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="nv">o.indent: </span><span class="err">@</span><span class="nx">idt</span><span class="p">(</span><span class="mi">1</span><span class="p">)</span>
+    <span class="nv">objects: </span><span class="k">for</span> <span class="nx">obj</span><span class="p">,</span> <span class="nx">i</span> <span class="k">in</span> <span class="err">@</span><span class="nx">objects</span>
+      <span class="nv">code: </span><span class="nx">obj</span><span class="p">.</span><span class="nx">compile</span><span class="p">(</span><span class="nx">o</span><span class="p">)</span>
+      <span class="k">if</span> <span class="nx">obj</span> <span class="k">instanceof</span> <span class="nx">CommentNode</span>
+        <span class="s2">&quot;\n$code\n$o.indent&quot;</span>
+      <span class="k">else</span> <span class="k">if</span> <span class="nx">i</span> <span class="o">is</span> <span class="err">@</span><span class="nx">objects</span><span class="p">.</span><span class="nx">length</span> <span class="o">-</span> <span class="mi">1</span>
+        <span class="nx">code</span>
+      <span class="k">else</span>
+        <span class="s2">&quot;$code, &quot;</span>
+    <span class="nv">objects: </span><span class="nx">objects</span><span class="p">.</span><span class="nx">join</span><span class="p">(</span><span class="s1">&#39;&#39;</span><span class="p">)</span>
+    <span class="nv">ending: </span><span class="k">if</span> <span class="nx">objects</span><span class="p">.</span><span class="nx">indexOf</span><span class="p">(</span><span class="s1">&#39;\n&#39;</span><span class="p">)</span> <span class="o">&gt;=</span> <span class="mi">0</span> <span class="k">then</span> <span class="s2">&quot;\n$@tab]&quot;</span> <span class="k">else</span> <span class="s1">&#39;]&#39;</span>
+    <span class="s2">&quot;[$objects$ending&quot;</span></pre></div>             </td>           </tr>                               <tr id="section-67">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-67">#</a>               </div>               <h3>ClassNode</h3>             </td>             <td class="code">               <div class="highlight"><pre></pre></div>             </td>           </tr>                               <tr id="section-68">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-68">#</a>               </div>               <p>The CoffeeScript class definition.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">exports.ClassNode: </span><span class="nx">class</span> <span class="nx">ClassNode</span> <span class="k">extends</span> <span class="nx">BaseNode</span>
+  <span class="nv">type: </span><span class="s1">&#39;Class&#39;</span></pre></div>             </td>           </tr>                               <tr id="section-69">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-69">#</a>               </div>               <p>Initialize a <strong>ClassNode</strong> with its name, an optional superclass, and a
+list of prototype property assignments.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">constructor: </span><span class="p">(</span><span class="nx">variable</span><span class="p">,</span> <span class="nx">parent</span><span class="p">,</span> <span class="nx">props</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nv">children: </span><span class="nx">compact</span> <span class="nx">flatten</span> <span class="p">[</span><span class="err">@</span><span class="nv">variable: </span><span class="nx">variable</span><span class="p">,</span> <span class="err">@</span><span class="nv">parent: </span><span class="nx">parent</span><span class="p">,</span> <span class="err">@</span><span class="nv">properties: </span><span class="nx">props</span> <span class="o">or</span> <span class="p">[]]</span></pre></div>             </td>           </tr>                               <tr id="section-70">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-70">#</a>               </div>               <p>Instead of generating the JavaScript string directly, we build up the
+equivalent syntax tree and compile that, in pieces. You can see the
+constructor, property assignments, and inheritance getting built out below.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">compile_node: </span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="nv">extension: </span>  <span class="err">@</span><span class="nx">parent</span> <span class="o">and</span> <span class="k">new</span> <span class="nx">ExtendsNode</span><span class="p">(</span><span class="err">@</span><span class="nx">variable</span><span class="p">,</span> <span class="err">@</span><span class="nx">parent</span><span class="p">)</span>
+    <span class="nv">constructor: </span><span class="kc">null</span>
+    <span class="nv">props: </span>      <span class="k">new</span> <span class="nx">Expressions</span><span class="p">()</span>
+    <span class="nv">o.top: </span>      <span class="kc">true</span>
+    <span class="nv">ret: </span>        <span class="nx">del</span> <span class="nx">o</span><span class="p">,</span> <span class="s1">&#39;returns&#39;</span>
+
+    <span class="k">for</span> <span class="nx">prop</span> <span class="k">in</span> <span class="err">@</span><span class="nx">properties</span>
+      <span class="k">if</span> <span class="nx">prop</span><span class="p">.</span><span class="nx">variable</span> <span class="o">and</span> <span class="nx">prop</span><span class="p">.</span><span class="nx">variable</span><span class="p">.</span><span class="nx">base</span><span class="p">.</span><span class="nx">value</span> <span class="o">is</span> <span class="s1">&#39;constructor&#39;</span>
+        <span class="nv">func: </span><span class="nx">prop</span><span class="p">.</span><span class="nx">value</span>
+        <span class="nx">func</span><span class="p">.</span><span class="nx">body</span><span class="p">.</span><span class="nx">push</span><span class="p">(</span><span class="k">new</span> <span class="nx">ReturnNode</span><span class="p">(</span><span class="nx">literal</span><span class="p">(</span><span class="s1">&#39;this&#39;</span><span class="p">)))</span>
+        <span class="nv">constructor: </span><span class="k">new</span> <span class="nx">AssignNode</span><span class="p">(</span><span class="err">@</span><span class="nx">variable</span><span class="p">,</span> <span class="nx">func</span><span class="p">)</span>
+      <span class="k">else</span>
+        <span class="k">if</span> <span class="nx">prop</span><span class="p">.</span><span class="nx">variable</span>
+          <span class="nv">val: </span><span class="k">new</span> <span class="nx">ValueNode</span><span class="p">(</span><span class="err">@</span><span class="nx">variable</span><span class="p">,</span> <span class="p">[</span><span class="k">new</span> <span class="nx">AccessorNode</span><span class="p">(</span><span class="nx">prop</span><span class="p">.</span><span class="nx">variable</span><span class="p">,</span> <span class="s1">&#39;prototype&#39;</span><span class="p">)])</span>
+          <span class="nv">prop: </span><span class="k">new</span> <span class="nx">AssignNode</span><span class="p">(</span><span class="nx">val</span><span class="p">,</span> <span class="nx">prop</span><span class="p">.</span><span class="nx">value</span><span class="p">)</span>
+        <span class="nx">props</span><span class="p">.</span><span class="nx">push</span> <span class="nx">prop</span>
+
+    <span class="k">if</span> <span class="o">not</span> <span class="nx">constructor</span>
+      <span class="k">if</span> <span class="err">@</span><span class="nx">parent</span>
+        <span class="nv">applied: </span><span class="k">new</span> <span class="nx">ValueNode</span><span class="p">(</span><span class="err">@</span><span class="nx">parent</span><span class="p">,</span> <span class="p">[</span><span class="k">new</span> <span class="nx">AccessorNode</span><span class="p">(</span><span class="nx">literal</span><span class="p">(</span><span class="s1">&#39;apply&#39;</span><span class="p">))])</span>
+        <span class="nv">constructor: </span><span class="k">new</span> <span class="nx">AssignNode</span><span class="p">(</span><span class="err">@</span><span class="nx">variable</span><span class="p">,</span> <span class="k">new</span> <span class="nx">CodeNode</span><span class="p">([],</span> <span class="k">new</span> <span class="nx">Expressions</span><span class="p">([</span>
+          <span class="k">new</span> <span class="nx">CallNode</span><span class="p">(</span><span class="nx">applied</span><span class="p">,</span> <span class="p">[</span><span class="nx">literal</span><span class="p">(</span><span class="s1">&#39;this&#39;</span><span class="p">),</span> <span class="nx">literal</span><span class="p">(</span><span class="s1">&#39;arguments&#39;</span><span class="p">)])</span>
+        <span class="p">])))</span>
+      <span class="k">else</span>
+        <span class="nv">constructor: </span><span class="k">new</span> <span class="nx">AssignNode</span><span class="p">(</span><span class="err">@</span><span class="nx">variable</span><span class="p">,</span> <span class="k">new</span> <span class="nx">CodeNode</span><span class="p">())</span>
+
+    <span class="nv">construct: </span>                      <span class="err">@</span><span class="nx">idt</span><span class="p">()</span> <span class="o">+</span> <span class="nx">constructor</span><span class="p">.</span><span class="nx">compile</span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="o">+</span> <span class="s1">&#39;;\n&#39;</span>
+    <span class="nv">props: </span>    <span class="k">if</span> <span class="nx">props</span><span class="p">.</span><span class="nx">empty</span><span class="p">()</span> <span class="k">then</span> <span class="s1">&#39;&#39;</span> <span class="k">else</span> <span class="nx">props</span><span class="p">.</span><span class="nx">compile</span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="o">+</span> <span class="s1">&#39;\n&#39;</span>
+    <span class="nv">extension: </span><span class="k">if</span> <span class="nx">extension</span>     <span class="k">then</span> <span class="err">@</span><span class="nx">idt</span><span class="p">()</span> <span class="o">+</span> <span class="nx">extension</span><span class="p">.</span><span class="nx">compile</span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="o">+</span> <span class="s1">&#39;;\n&#39;</span> <span class="k">else</span> <span class="s1">&#39;&#39;</span>
+    <span class="nv">returns: </span>  <span class="k">if</span> <span class="nx">ret</span>           <span class="k">then</span> <span class="s1">&#39;\n&#39;</span> <span class="o">+</span> <span class="err">@</span><span class="nx">idt</span><span class="p">()</span> <span class="o">+</span> <span class="s1">&#39;return &#39;</span> <span class="o">+</span> <span class="err">@</span><span class="nx">variable</span><span class="p">.</span><span class="nx">compile</span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="o">+</span> <span class="s1">&#39;;&#39;</span> <span class="k">else</span> <span class="s1">&#39;&#39;</span>
+    <span class="s2">&quot;$construct$extension$props$returns&quot;</span>
+
+<span class="nx">statement</span> <span class="nx">ClassNode</span></pre></div>             </td>           </tr>                               <tr id="section-71">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-71">#</a>               </div>               <h3>PushNode</h3>             </td>             <td class="code">               <div class="highlight"><pre></pre></div>             </td>           </tr>                               <tr id="section-72">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-72">#</a>               </div>               <p>A faux-node that is never created by the grammar, but is used during
+code generation to generate a quick <code>array.push(value)</code> tree of nodes.
+Helpful for recording the result arrays from comprehensions.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">PushNode: exports.PushNode: </span><span class="p">{</span>
+
+  <span class="nv">wrap: </span><span class="p">(</span><span class="nx">array</span><span class="p">,</span> <span class="nx">expressions</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="nv">expr: </span><span class="nx">expressions</span><span class="p">.</span><span class="nx">unwrap</span><span class="p">()</span>
+    <span class="k">return</span> <span class="nx">expressions</span> <span class="k">if</span> <span class="nx">expr</span><span class="p">.</span><span class="nx">is_pure_statement</span><span class="p">()</span> <span class="o">or</span> <span class="nx">expr</span><span class="p">.</span><span class="nx">contains</span> <span class="p">(</span><span class="nx">n</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="nx">n</span><span class="p">.</span><span class="nx">is_pure_statement</span><span class="p">()</span>
+    <span class="nx">Expressions</span><span class="p">.</span><span class="nx">wrap</span><span class="p">([</span><span class="k">new</span> <span class="nx">CallNode</span><span class="p">(</span>
+      <span class="k">new</span> <span class="nx">ValueNode</span><span class="p">(</span><span class="nx">literal</span><span class="p">(</span><span class="nx">array</span><span class="p">),</span> <span class="p">[</span><span class="k">new</span> <span class="nx">AccessorNode</span><span class="p">(</span><span class="nx">literal</span><span class="p">(</span><span class="s1">&#39;push&#39;</span><span class="p">))]),</span> <span class="p">[</span><span class="nx">expr</span><span class="p">]</span>
+    <span class="p">)])</span>
+
+<span class="p">}</span></pre></div>             </td>           </tr>                               <tr id="section-73">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-73">#</a>               </div>               <h3>ClosureNode</h3>             </td>             <td class="code">               <div class="highlight"><pre></pre></div>             </td>           </tr>                               <tr id="section-74">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-74">#</a>               </div>               <p>A faux-node used to wrap an expressions body in a closure.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">ClosureNode: exports.ClosureNode: </span><span class="p">{</span>
+
+  <span class="nv">wrap: </span><span class="p">(</span><span class="nx">expressions</span><span class="p">,</span> <span class="nx">statement</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="nv">func: </span><span class="k">new</span> <span class="nx">ParentheticalNode</span><span class="p">(</span><span class="k">new</span> <span class="nx">CodeNode</span><span class="p">([],</span> <span class="nx">Expressions</span><span class="p">.</span><span class="nx">wrap</span><span class="p">([</span><span class="nx">expressions</span><span class="p">])))</span>
+    <span class="nv">call: </span><span class="k">new</span> <span class="nx">CallNode</span><span class="p">(</span><span class="k">new</span> <span class="nx">ValueNode</span><span class="p">(</span><span class="nx">func</span><span class="p">,</span> <span class="p">[</span><span class="k">new</span> <span class="nx">AccessorNode</span><span class="p">(</span><span class="nx">literal</span><span class="p">(</span><span class="s1">&#39;call&#39;</span><span class="p">))]),</span> <span class="p">[</span><span class="nx">literal</span><span class="p">(</span><span class="s1">&#39;this&#39;</span><span class="p">)])</span>
+    <span class="k">if</span> <span class="nx">statement</span> <span class="k">then</span> <span class="nx">Expressions</span><span class="p">.</span><span class="nx">wrap</span><span class="p">([</span><span class="nx">call</span><span class="p">])</span> <span class="k">else</span> <span class="nx">call</span>
+
+<span class="p">}</span></pre></div>             </td>           </tr>                               <tr id="section-75">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-75">#</a>               </div>               <h3>AssignNode</h3>             </td>             <td class="code">               <div class="highlight"><pre></pre></div>             </td>           </tr>                               <tr id="section-76">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-76">#</a>               </div>               <p>The <strong>AssignNode</strong> is used to assign a local variable to value, or to set the
+property of an object -- including within object literals.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">exports.AssignNode: </span><span class="nx">class</span> <span class="nx">AssignNode</span> <span class="k">extends</span> <span class="nx">BaseNode</span>
+  <span class="nv">type: </span><span class="s1">&#39;Assign&#39;</span></pre></div>             </td>           </tr>                               <tr id="section-77">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-77">#</a>               </div>               <p>Matchers for detecting prototype assignments.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">PROTO_ASSIGN: </span><span class="sr">/^(\S+)\.prototype/</span>
+  <span class="nv">LEADING_DOT: </span> <span class="sr">/^\.(prototype\.)?/</span>
+
+  <span class="nv">constructor: </span><span class="p">(</span><span class="nx">variable</span><span class="p">,</span> <span class="nx">value</span><span class="p">,</span> <span class="nx">context</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nv">children: </span><span class="p">[</span><span class="err">@</span><span class="nv">variable: </span><span class="nx">variable</span><span class="p">,</span> <span class="err">@</span><span class="nv">value: </span><span class="nx">value</span><span class="p">]</span>
+    <span class="err">@</span><span class="nv">context: </span><span class="nx">context</span>
+
+  <span class="nv">top_sensitive: </span><span class="o">-&gt;</span>
+    <span class="kc">true</span>
+
+  <span class="nv">is_value: </span><span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nx">variable</span> <span class="k">instanceof</span> <span class="nx">ValueNode</span>
+
+  <span class="nv">is_statement: </span><span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nx">is_value</span><span class="p">()</span> <span class="o">and</span> <span class="p">(</span><span class="err">@</span><span class="nx">variable</span><span class="p">.</span><span class="nx">is_array</span><span class="p">()</span> <span class="o">or</span> <span class="err">@</span><span class="nx">variable</span><span class="p">.</span><span class="nx">is_object</span><span class="p">())</span></pre></div>             </td>           </tr>                               <tr id="section-78">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-78">#</a>               </div>               <p>Compile an assignment, delegating to <code>compile_pattern_match</code> or
+<code>compile_splice</code> if appropriate. Keep track of the name of the base object
+we've been assigned to, for correct internal references. If the variable
+has not been seen yet within the current scope, declare it.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">compile_node: </span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="nv">top: </span>   <span class="nx">del</span> <span class="nx">o</span><span class="p">,</span> <span class="s1">&#39;top&#39;</span>
+    <span class="k">return</span>  <span class="err">@</span><span class="nx">compile_pattern_match</span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="k">if</span> <span class="err">@</span><span class="nx">is_statement</span><span class="p">()</span>
+    <span class="k">return</span>  <span class="err">@</span><span class="nx">compile_splice</span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="k">if</span> <span class="err">@</span><span class="nx">is_value</span><span class="p">()</span> <span class="o">and</span> <span class="err">@</span><span class="nx">variable</span><span class="p">.</span><span class="nx">is_splice</span><span class="p">()</span>
+    <span class="nv">stmt: </span>  <span class="nx">del</span> <span class="nx">o</span><span class="p">,</span> <span class="s1">&#39;as_statement&#39;</span>
+    <span class="nv">name: </span>  <span class="err">@</span><span class="nx">variable</span><span class="p">.</span><span class="nx">compile</span><span class="p">(</span><span class="nx">o</span><span class="p">)</span>
+    <span class="nv">last: </span>  <span class="k">if</span> <span class="err">@</span><span class="nx">is_value</span><span class="p">()</span> <span class="k">then</span> <span class="err">@</span><span class="nx">variable</span><span class="p">.</span><span class="nx">last</span><span class="p">.</span><span class="nx">replace</span><span class="p">(</span><span class="err">@</span><span class="nx">LEADING_DOT</span><span class="p">,</span> <span class="s1">&#39;&#39;</span><span class="p">)</span> <span class="k">else</span> <span class="nx">name</span>
+    <span class="nv">match: </span> <span class="nx">name</span><span class="p">.</span><span class="nx">match</span><span class="p">(</span><span class="err">@</span><span class="nx">PROTO_ASSIGN</span><span class="p">)</span>
+    <span class="nv">proto: </span> <span class="nx">match</span> <span class="o">and</span> <span class="nx">match</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span>
+    <span class="k">if</span> <span class="err">@</span><span class="nx">value</span> <span class="k">instanceof</span> <span class="nx">CodeNode</span>
+      <span class="err">@</span><span class="nv">value.name: </span> <span class="nx">last</span>  <span class="k">if</span> <span class="nx">last</span><span class="p">.</span><span class="nx">match</span><span class="p">(</span><span class="nx">IDENTIFIER</span><span class="p">)</span>
+      <span class="err">@</span><span class="nv">value.proto: </span><span class="nx">proto</span> <span class="k">if</span> <span class="nx">proto</span>
+    <span class="nv">val: </span><span class="err">@</span><span class="nx">value</span><span class="p">.</span><span class="nx">compile</span> <span class="nx">o</span>
+    <span class="k">return</span> <span class="s2">&quot;$name: $val&quot;</span> <span class="k">if</span> <span class="err">@</span><span class="nx">context</span> <span class="o">is</span> <span class="s1">&#39;object&#39;</span>
+    <span class="nx">o</span><span class="p">.</span><span class="nx">scope</span><span class="p">.</span><span class="nx">find</span> <span class="nx">name</span> <span class="nx">unless</span> <span class="err">@</span><span class="nx">is_value</span><span class="p">()</span> <span class="o">and</span> <span class="err">@</span><span class="nx">variable</span><span class="p">.</span><span class="nx">has_properties</span><span class="p">()</span>
+    <span class="nv">val: </span><span class="s2">&quot;$name = $val&quot;</span>
+    <span class="k">return</span> <span class="s2">&quot;$@tab$val;&quot;</span> <span class="k">if</span> <span class="nx">stmt</span>
+    <span class="nv">val: </span><span class="s2">&quot;($val)&quot;</span> <span class="k">if</span> <span class="o">not</span> <span class="nx">top</span> <span class="o">or</span> <span class="nx">o</span><span class="p">.</span><span class="nx">returns</span>
+    <span class="nv">val: </span><span class="s2">&quot;${@tab}return $val&quot;</span> <span class="k">if</span> <span class="nx">o</span><span class="p">.</span><span class="nx">returns</span>
+    <span class="nx">val</span></pre></div>             </td>           </tr>                               <tr id="section-79">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-79">#</a>               </div>               <p>Brief implementation of recursive pattern matching, when assigning array or
+object literals to a value. Peeks at their properties to assign inner names.
+See the <a href="http://wiki.ecmascript.org/doku.php?id=harmony:destructuring">ECMAScript Harmony Wiki</a>
+for details.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">compile_pattern_match: </span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="nv">val_var: </span><span class="nx">o</span><span class="p">.</span><span class="nx">scope</span><span class="p">.</span><span class="nx">free_variable</span><span class="p">()</span>
+    <span class="nv">value: </span><span class="k">if</span> <span class="err">@</span><span class="nx">value</span><span class="p">.</span><span class="nx">is_statement</span><span class="p">()</span> <span class="k">then</span> <span class="nx">ClosureNode</span><span class="p">.</span><span class="nx">wrap</span><span class="p">(</span><span class="err">@</span><span class="nx">value</span><span class="p">)</span> <span class="k">else</span> <span class="err">@</span><span class="nx">value</span>
+    <span class="nv">assigns: </span><span class="p">[</span><span class="s2">&quot;$@tab$val_var = ${ value.compile(o) };&quot;</span><span class="p">]</span>
+    <span class="nv">o.top: </span><span class="kc">true</span>
+    <span class="nv">o.as_statement: </span><span class="kc">true</span>
+    <span class="k">for</span> <span class="nx">obj</span><span class="p">,</span> <span class="nx">i</span> <span class="k">in</span> <span class="err">@</span><span class="nx">variable</span><span class="p">.</span><span class="nx">base</span><span class="p">.</span><span class="nx">objects</span>
+      <span class="nv">idx: </span><span class="nx">i</span>
+      <span class="p">[</span><span class="nx">obj</span><span class="p">,</span> <span class="nx">idx</span><span class="p">]</span><span class="o">:</span> <span class="p">[</span><span class="nx">obj</span><span class="p">.</span><span class="nx">value</span><span class="p">,</span> <span class="nx">obj</span><span class="p">.</span><span class="nx">variable</span><span class="p">.</span><span class="nx">base</span><span class="p">]</span> <span class="k">if</span> <span class="err">@</span><span class="nx">variable</span><span class="p">.</span><span class="nx">is_object</span><span class="p">()</span>
+      <span class="nv">access_class: </span><span class="k">if</span> <span class="err">@</span><span class="nx">variable</span><span class="p">.</span><span class="nx">is_array</span><span class="p">()</span> <span class="k">then</span> <span class="nx">IndexNode</span> <span class="k">else</span> <span class="nx">AccessorNode</span>
+      <span class="k">if</span> <span class="nx">obj</span> <span class="k">instanceof</span> <span class="nx">SplatNode</span>
+        <span class="nv">val: </span><span class="nx">literal</span><span class="p">(</span><span class="nx">obj</span><span class="p">.</span><span class="nx">compile_value</span><span class="p">(</span><span class="nx">o</span><span class="p">,</span> <span class="nx">val_var</span><span class="p">,</span> <span class="err">@</span><span class="nx">variable</span><span class="p">.</span><span class="nx">base</span><span class="p">.</span><span class="nx">objects</span><span class="p">.</span><span class="nx">indexOf</span><span class="p">(</span><span class="nx">obj</span><span class="p">)))</span>
+      <span class="k">else</span>
+        <span class="nv">idx: </span><span class="nx">literal</span><span class="p">(</span><span class="nx">idx</span><span class="p">)</span> <span class="nx">unless</span> <span class="k">typeof</span> <span class="nx">idx</span> <span class="o">is</span> <span class="s1">&#39;object&#39;</span>
+        <span class="nv">val: </span><span class="k">new</span> <span class="nx">ValueNode</span><span class="p">(</span><span class="nx">literal</span><span class="p">(</span><span class="nx">val_var</span><span class="p">),</span> <span class="p">[</span><span class="k">new</span> <span class="nx">access_class</span><span class="p">(</span><span class="nx">idx</span><span class="p">)])</span>
+      <span class="nx">assigns</span><span class="p">.</span><span class="nx">push</span><span class="p">(</span><span class="k">new</span> <span class="nx">AssignNode</span><span class="p">(</span><span class="nx">obj</span><span class="p">,</span> <span class="nx">val</span><span class="p">).</span><span class="nx">compile</span><span class="p">(</span><span class="nx">o</span><span class="p">))</span>
+    <span class="nv">code: </span><span class="nx">assigns</span><span class="p">.</span><span class="nx">join</span><span class="p">(</span><span class="s2">&quot;\n&quot;</span><span class="p">)</span>
+    <span class="nx">code</span> <span class="o">+=</span> <span class="s2">&quot;\n${@tab}return ${ @variable.compile(o) };&quot;</span> <span class="k">if</span> <span class="nx">o</span><span class="p">.</span><span class="nx">returns</span>
+    <span class="nx">code</span></pre></div>             </td>           </tr>                               <tr id="section-80">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-80">#</a>               </div>               <p>Compile the assignment from an array splice literal, using JavaScript's
+<code>Array#splice</code> method.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">compile_splice: </span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="nv">name: </span>  <span class="err">@</span><span class="nx">variable</span><span class="p">.</span><span class="nx">compile</span><span class="p">(</span><span class="nx">merge</span><span class="p">(</span><span class="nx">o</span><span class="p">,</span> <span class="p">{</span><span class="nv">only_first: </span><span class="kc">true</span><span class="p">}))</span>
+    <span class="nv">l: </span>     <span class="err">@</span><span class="nx">variable</span><span class="p">.</span><span class="nx">properties</span><span class="p">.</span><span class="nx">length</span>
+    <span class="nv">range: </span> <span class="err">@</span><span class="nx">variable</span><span class="p">.</span><span class="nx">properties</span><span class="p">[</span><span class="nx">l</span> <span class="o">-</span> <span class="mi">1</span><span class="p">].</span><span class="nx">range</span>
+    <span class="nv">plus: </span>  <span class="k">if</span> <span class="nx">range</span><span class="p">.</span><span class="nx">exclusive</span> <span class="k">then</span> <span class="s1">&#39;&#39;</span> <span class="k">else</span> <span class="s1">&#39; + 1&#39;</span>
+    <span class="nv">from: </span>  <span class="nx">range</span><span class="p">.</span><span class="nx">from</span><span class="p">.</span><span class="nx">compile</span><span class="p">(</span><span class="nx">o</span><span class="p">)</span>
+    <span class="nv">to: </span>    <span class="nx">range</span><span class="p">.</span><span class="nx">to</span><span class="p">.</span><span class="nx">compile</span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="o">+</span> <span class="s1">&#39; - &#39;</span> <span class="o">+</span> <span class="nx">from</span> <span class="o">+</span> <span class="nx">plus</span>
+    <span class="nv">val: </span>   <span class="err">@</span><span class="nx">value</span><span class="p">.</span><span class="nx">compile</span><span class="p">(</span><span class="nx">o</span><span class="p">)</span>
+    <span class="s2">&quot;${name}.splice.apply($name, [$from, $to].concat($val))&quot;</span></pre></div>             </td>           </tr>                               <tr id="section-81">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-81">#</a>               </div>               <h3>CodeNode</h3>             </td>             <td class="code">               <div class="highlight"><pre></pre></div>             </td>           </tr>                               <tr id="section-82">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-82">#</a>               </div>               <p>A function definition. This is the only node that creates a new Scope.
+When for the purposes of walking the contents of a function body, the CodeNode
+has no <em>children</em> -- they're within the inner scope.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">exports.CodeNode: </span><span class="nx">class</span> <span class="nx">CodeNode</span> <span class="k">extends</span> <span class="nx">BaseNode</span>
+  <span class="nv">type: </span><span class="s1">&#39;Code&#39;</span>
+
+  <span class="nv">constructor: </span><span class="p">(</span><span class="nx">params</span><span class="p">,</span> <span class="nx">body</span><span class="p">,</span> <span class="nx">tag</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nv">params: </span> <span class="nx">params</span> <span class="o">or</span> <span class="p">[]</span>
+    <span class="err">@</span><span class="nv">body: </span>   <span class="nx">body</span> <span class="o">or</span> <span class="k">new</span> <span class="nx">Expressions</span><span class="p">()</span>
+    <span class="err">@</span><span class="nv">bound: </span>  <span class="nx">tag</span> <span class="o">is</span> <span class="s1">&#39;boundfunc&#39;</span></pre></div>             </td>           </tr>                               <tr id="section-83">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-83">#</a>               </div>               <p>Compilation creates a new scope unless explicitly asked to share with the
+outer scope. Handles splat parameters in the parameter list by peeking at
+the JavaScript <code>arguments</code> objects. If the function is bound with the <code>=&gt;</code>
+arrow, generates a wrapper that saves the current value of <code>this</code> through
+a closure.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">compile_node: </span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="nv">shared_scope: </span><span class="nx">del</span> <span class="nx">o</span><span class="p">,</span> <span class="s1">&#39;shared_scope&#39;</span>
+    <span class="nv">top: </span>         <span class="nx">del</span> <span class="nx">o</span><span class="p">,</span> <span class="s1">&#39;top&#39;</span>
+    <span class="nv">o.scope: </span>     <span class="nx">shared_scope</span> <span class="o">or</span> <span class="k">new</span> <span class="nx">Scope</span><span class="p">(</span><span class="nx">o</span><span class="p">.</span><span class="nx">scope</span><span class="p">,</span> <span class="err">@</span><span class="nx">body</span><span class="p">,</span> <span class="k">this</span><span class="p">)</span>
+    <span class="nv">o.returns: </span>   <span class="kc">true</span>
+    <span class="nv">o.top: </span>       <span class="kc">true</span>
+    <span class="nv">o.indent: </span>    <span class="err">@</span><span class="nx">idt</span><span class="p">(</span><span class="k">if</span> <span class="err">@</span><span class="nx">bound</span> <span class="k">then</span> <span class="mi">2</span> <span class="k">else</span> <span class="mi">1</span><span class="p">)</span>
+    <span class="nx">del</span> <span class="nx">o</span><span class="p">,</span> <span class="s1">&#39;no_wrap&#39;</span>
+    <span class="nx">del</span> <span class="nx">o</span><span class="p">,</span> <span class="s1">&#39;globals&#39;</span>
+    <span class="k">if</span> <span class="err">@</span><span class="nx">params</span><span class="p">[</span><span class="err">@</span><span class="nx">params</span><span class="p">.</span><span class="nx">length</span> <span class="o">-</span> <span class="mi">1</span><span class="p">]</span> <span class="k">instanceof</span> <span class="nx">SplatNode</span>
+      <span class="nv">splat: </span><span class="err">@</span><span class="nx">params</span><span class="p">.</span><span class="nx">pop</span><span class="p">()</span>
+      <span class="nv">splat.index: </span><span class="err">@</span><span class="nx">params</span><span class="p">.</span><span class="nx">length</span>
+      <span class="err">@</span><span class="nx">body</span><span class="p">.</span><span class="nx">unshift</span><span class="p">(</span><span class="nx">splat</span><span class="p">)</span>
+    <span class="nv">params: </span><span class="p">(</span><span class="nx">param</span><span class="p">.</span><span class="nx">compile</span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="k">for</span> <span class="nx">param</span> <span class="k">in</span> <span class="err">@</span><span class="nx">params</span><span class="p">)</span>
+    <span class="p">(</span><span class="nx">o</span><span class="p">.</span><span class="nx">scope</span><span class="p">.</span><span class="nx">parameter</span><span class="p">(</span><span class="nx">param</span><span class="p">))</span> <span class="k">for</span> <span class="nx">param</span> <span class="k">in</span> <span class="nx">params</span>
+    <span class="nv">code: </span><span class="k">if</span> <span class="err">@</span><span class="nx">body</span><span class="p">.</span><span class="nx">expressions</span><span class="p">.</span><span class="nx">length</span> <span class="k">then</span> <span class="s2">&quot;\n${ @body.compile_with_declarations(o) }\n&quot;</span> <span class="k">else</span> <span class="s1">&#39;&#39;</span>
+    <span class="nv">name_part: </span><span class="k">if</span> <span class="err">@</span><span class="nx">name</span> <span class="k">then</span> <span class="s1">&#39; &#39;</span> <span class="o">+</span> <span class="err">@</span><span class="nx">name</span> <span class="k">else</span> <span class="s1">&#39;&#39;</span>
+    <span class="nv">func: </span><span class="s2">&quot;function${ if @bound then &#39;&#39; else name_part }(${ params.join(&#39;, &#39;) }) {$code${@idt(if @bound then 1 else 0)}}&quot;</span>
+    <span class="nv">func: </span><span class="s2">&quot;($func)&quot;</span> <span class="k">if</span> <span class="nx">top</span> <span class="o">and</span> <span class="o">not</span> <span class="err">@</span><span class="nx">bound</span>
+    <span class="k">return</span> <span class="nx">func</span> <span class="nx">unless</span> <span class="err">@</span><span class="nx">bound</span>
+    <span class="nv">inner: </span><span class="s2">&quot;(function$name_part() {\n${@idt(2)}return __func.apply(__this, arguments);\n${@idt(1)}});&quot;</span>
+    <span class="s2">&quot;(function(__this) {\n${@idt(1)}var __func = $func;\n${@idt(1)}return $inner\n$@tab})(this)&quot;</span>
+
+  <span class="nv">top_sensitive: </span><span class="o">-&gt;</span>
+    <span class="kc">true</span></pre></div>             </td>           </tr>                               <tr id="section-84">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-84">#</a>               </div>               <p>When traversing (for printing or inspecting), return the real children of
+the function -- the parameters and body of expressions.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">real_children: </span><span class="o">-&gt;</span>
+    <span class="nx">flatten</span> <span class="p">[</span><span class="err">@</span><span class="nx">params</span><span class="p">,</span> <span class="err">@</span><span class="nx">body</span><span class="p">.</span><span class="nx">expressions</span><span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-85">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-85">#</a>               </div>               <p>Custom <code>traverse</code> implementation that uses the <code>real_children</code>.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">traverse: </span><span class="p">(</span><span class="nx">block</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="nx">block</span> <span class="k">this</span>
+    <span class="nx">block</span><span class="p">(</span><span class="nx">child</span><span class="p">)</span> <span class="k">for</span> <span class="nx">child</span> <span class="k">in</span> <span class="err">@</span><span class="nx">real_children</span><span class="p">()</span>
+
+  <span class="nv">toString: </span><span class="p">(</span><span class="nx">idt</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="nx">idt</span> <span class="o">||=</span> <span class="s1">&#39;&#39;</span>
+    <span class="nv">children: </span><span class="p">(</span><span class="nx">child</span><span class="p">.</span><span class="nx">toString</span><span class="p">(</span><span class="nx">idt</span> <span class="o">+</span> <span class="nx">TAB</span><span class="p">)</span> <span class="k">for</span> <span class="nx">child</span> <span class="k">in</span> <span class="err">@</span><span class="nx">real_children</span><span class="p">()).</span><span class="nx">join</span><span class="p">(</span><span class="s1">&#39;&#39;</span><span class="p">)</span>
+    <span class="s2">&quot;\n$idt$children&quot;</span></pre></div>             </td>           </tr>                               <tr id="section-86">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-86">#</a>               </div>               <h3>SplatNode</h3>             </td>             <td class="code">               <div class="highlight"><pre></pre></div>             </td>           </tr>                               <tr id="section-87">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-87">#</a>               </div>               <p>A splat, either as a parameter to a function, an argument to a call,
+or as part of a destructuring assignment.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">exports.SplatNode: </span><span class="nx">class</span> <span class="nx">SplatNode</span> <span class="k">extends</span> <span class="nx">BaseNode</span>
+  <span class="nv">type: </span><span class="s1">&#39;Splat&#39;</span>
+
+  <span class="nv">constructor: </span><span class="p">(</span><span class="nx">name</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="nv">name: </span><span class="nx">literal</span><span class="p">(</span><span class="nx">name</span><span class="p">)</span> <span class="nx">unless</span> <span class="nx">name</span><span class="p">.</span><span class="nx">compile</span>
+    <span class="err">@</span><span class="nv">children: </span><span class="p">[</span><span class="err">@</span><span class="nv">name: </span><span class="nx">name</span><span class="p">]</span>
+
+  <span class="nv">compile_node: </span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="k">if</span> <span class="err">@</span><span class="nx">index</span><span class="o">?</span> <span class="k">then</span> <span class="err">@</span><span class="nx">compile_param</span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="k">else</span> <span class="err">@</span><span class="nx">name</span><span class="p">.</span><span class="nx">compile</span><span class="p">(</span><span class="nx">o</span><span class="p">)</span></pre></div>             </td>           </tr>                               <tr id="section-88">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-88">#</a>               </div>               <p>Compiling a parameter splat means recovering the parameters that succeed
+the splat in the parameter list, by slicing the arguments object.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">compile_param: </span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="nv">name: </span><span class="err">@</span><span class="nx">name</span><span class="p">.</span><span class="nx">compile</span><span class="p">(</span><span class="nx">o</span><span class="p">)</span>
+    <span class="nx">o</span><span class="p">.</span><span class="nx">scope</span><span class="p">.</span><span class="nx">find</span> <span class="nx">name</span>
+    <span class="s2">&quot;$name = Array.prototype.slice.call(arguments, $@index)&quot;</span></pre></div>             </td>           </tr>                               <tr id="section-89">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-89">#</a>               </div>               <p>A compiling a splat as a destructuring assignment means slicing arguments
+from the right-hand-side's corresponding array.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">compile_value: </span><span class="p">(</span><span class="nx">o</span><span class="p">,</span> <span class="nx">name</span><span class="p">,</span> <span class="nx">index</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="s2">&quot;Array.prototype.slice.call($name, $index)&quot;</span></pre></div>             </td>           </tr>                               <tr id="section-90">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-90">#</a>               </div>               <h3>WhileNode</h3>             </td>             <td class="code">               <div class="highlight"><pre></pre></div>             </td>           </tr>                               <tr id="section-91">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-91">#</a>               </div>               <p>A while loop, the only sort of low-level loop exposed by CoffeeScript. From
+it, all other loops can be manufactured. Useful in cases where you need more
+flexibility or more speed than a comprehension can provide.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">exports.WhileNode: </span><span class="nx">class</span> <span class="nx">WhileNode</span> <span class="k">extends</span> <span class="nx">BaseNode</span>
+  <span class="nv">type: </span><span class="s1">&#39;While&#39;</span>
+
+  <span class="nv">constructor: </span><span class="p">(</span><span class="nx">condition</span><span class="p">,</span> <span class="nx">opts</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nx">children</span><span class="o">:</span><span class="p">[</span><span class="err">@</span><span class="nv">condition: </span><span class="nx">condition</span><span class="p">]</span>
+    <span class="err">@</span><span class="nv">filter: </span><span class="nx">opts</span> <span class="o">and</span> <span class="nx">opts</span><span class="p">.</span><span class="nx">filter</span>
+
+  <span class="nv">add_body: </span><span class="p">(</span><span class="nx">body</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nx">children</span><span class="p">.</span><span class="nx">push</span> <span class="err">@</span><span class="nv">body: </span><span class="nx">body</span>
+    <span class="k">this</span>
+
+  <span class="nv">top_sensitive: </span><span class="o">-&gt;</span>
+    <span class="kc">true</span></pre></div>             </td>           </tr>                               <tr id="section-92">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-92">#</a>               </div>               <p>The main difference from a JavaScript <em>while</em> is that the CoffeeScript
+<em>while</em> can be used as a part of a larger expression -- while loops may
+return an array containing the computed result of each iteration.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">compile_node: </span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="nv">returns: </span>   <span class="nx">del</span><span class="p">(</span><span class="nx">o</span><span class="p">,</span> <span class="s1">&#39;returns&#39;</span><span class="p">)</span>
+    <span class="nv">top: </span>       <span class="nx">del</span><span class="p">(</span><span class="nx">o</span><span class="p">,</span> <span class="s1">&#39;top&#39;</span><span class="p">)</span> <span class="o">and</span> <span class="o">not</span> <span class="nx">returns</span>
+    <span class="nv">o.indent: </span>  <span class="err">@</span><span class="nx">idt</span><span class="p">(</span><span class="mi">1</span><span class="p">)</span>
+    <span class="nv">o.top: </span>     <span class="kc">true</span>
+    <span class="nv">cond: </span>      <span class="err">@</span><span class="nx">condition</span><span class="p">.</span><span class="nx">compile</span><span class="p">(</span><span class="nx">o</span><span class="p">)</span>
+    <span class="nv">set: </span>       <span class="s1">&#39;&#39;</span>
+    <span class="k">if</span> <span class="o">not</span> <span class="nx">top</span>
+      <span class="nv">rvar: </span>    <span class="nx">o</span><span class="p">.</span><span class="nx">scope</span><span class="p">.</span><span class="nx">free_variable</span><span class="p">()</span>
+      <span class="nv">set: </span>     <span class="s2">&quot;$@tab$rvar = [];\n&quot;</span>
+      <span class="err">@</span><span class="nv">body: </span>   <span class="nx">PushNode</span><span class="p">.</span><span class="nx">wrap</span><span class="p">(</span><span class="nx">rvar</span><span class="p">,</span> <span class="err">@</span><span class="nx">body</span><span class="p">)</span> <span class="k">if</span> <span class="err">@</span><span class="nx">body</span>
+    <span class="nv">post: </span>      <span class="k">if</span> <span class="nx">returns</span> <span class="k">then</span> <span class="s2">&quot;\n${@tab}return $rvar;&quot;</span> <span class="k">else</span> <span class="s1">&#39;&#39;</span>
+    <span class="nv">pre: </span>       <span class="s2">&quot;$set${@tab}while ($cond)&quot;</span>
+    <span class="k">return</span>      <span class="s2">&quot;$pre null;$post&quot;</span> <span class="k">if</span> <span class="o">not</span> <span class="err">@</span><span class="nx">body</span>
+    <span class="err">@</span><span class="nv">body: </span>     <span class="nx">Expressions</span><span class="p">.</span><span class="nx">wrap</span><span class="p">([</span><span class="k">new</span> <span class="nx">IfNode</span><span class="p">(</span><span class="err">@</span><span class="nx">filter</span><span class="p">,</span> <span class="err">@</span><span class="nx">body</span><span class="p">)])</span> <span class="k">if</span> <span class="err">@</span><span class="nx">filter</span>
+    <span class="s2">&quot;$pre {\n${ @body.compile(o) }\n$@tab}$post&quot;</span>
+
+<span class="nx">statement</span> <span class="nx">WhileNode</span></pre></div>             </td>           </tr>                               <tr id="section-93">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-93">#</a>               </div>               <h3>OpNode</h3>             </td>             <td class="code">               <div class="highlight"><pre></pre></div>             </td>           </tr>                               <tr id="section-94">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-94">#</a>               </div>               <p>Simple Arithmetic and logical operations. Performs some conversion from
+CoffeeScript operations into their JavaScript equivalents.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">exports.OpNode: </span><span class="nx">class</span> <span class="nx">OpNode</span> <span class="k">extends</span> <span class="nx">BaseNode</span>
+  <span class="nv">type: </span><span class="s1">&#39;Op&#39;</span></pre></div>             </td>           </tr>                               <tr id="section-95">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-95">#</a>               </div>               <p>The map of conversions from CoffeeScript to JavaScript symbols.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">CONVERSIONS: </span><span class="p">{</span>
+    <span class="s1">&#39;==&#39;</span><span class="o">:</span>   <span class="s1">&#39;===&#39;</span>
+    <span class="s1">&#39;!=&#39;</span><span class="o">:</span>   <span class="s1">&#39;!==&#39;</span>
+    <span class="s1">&#39;and&#39;</span><span class="o">:</span>  <span class="s1">&#39;&amp;&amp;&#39;</span>
+    <span class="s1">&#39;or&#39;</span><span class="o">:</span>   <span class="s1">&#39;||&#39;</span>
+    <span class="s1">&#39;is&#39;</span><span class="o">:</span>   <span class="s1">&#39;===&#39;</span>
+    <span class="s1">&#39;isnt&#39;</span><span class="o">:</span> <span class="s1">&#39;!==&#39;</span>
+    <span class="s1">&#39;not&#39;</span><span class="o">:</span>  <span class="s1">&#39;!&#39;</span>
+  <span class="p">}</span></pre></div>             </td>           </tr>                               <tr id="section-96">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-96">#</a>               </div>               <p>The list of operators for which we perform
+<a href="http://docs.python.org/reference/expressions.html#notin">Python-style comparison chaining</a>.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">CHAINABLE: </span>       <span class="p">[</span><span class="s1">&#39;&lt;&#39;</span><span class="p">,</span> <span class="s1">&#39;&gt;&#39;</span><span class="p">,</span> <span class="s1">&#39;&gt;=&#39;</span><span class="p">,</span> <span class="s1">&#39;&lt;=&#39;</span><span class="p">,</span> <span class="s1">&#39;===&#39;</span><span class="p">,</span> <span class="s1">&#39;!==&#39;</span><span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-97">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-97">#</a>               </div>               <p>Our assignment operators that have no JavaScript equivalent.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">ASSIGNMENT: </span>      <span class="p">[</span><span class="s1">&#39;||=&#39;</span><span class="p">,</span> <span class="s1">&#39;&amp;&amp;=&#39;</span><span class="p">,</span> <span class="s1">&#39;?=&#39;</span><span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-98">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-98">#</a>               </div>               <p>Operators must come before their operands with a space.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">PREFIX_OPERATORS: </span><span class="p">[</span><span class="s1">&#39;typeof&#39;</span><span class="p">,</span> <span class="s1">&#39;delete&#39;</span><span class="p">]</span>
+
+  <span class="nv">constructor: </span><span class="p">(</span><span class="nx">operator</span><span class="p">,</span> <span class="nx">first</span><span class="p">,</span> <span class="nx">second</span><span class="p">,</span> <span class="nx">flip</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nx">type</span> <span class="o">+=</span> <span class="s1">&#39; &#39;</span> <span class="o">+</span> <span class="nx">operator</span>
+    <span class="err">@</span><span class="nv">children: </span><span class="nx">compact</span> <span class="p">[</span><span class="err">@</span><span class="nv">first: </span><span class="nx">first</span><span class="p">,</span> <span class="err">@</span><span class="nv">second: </span><span class="nx">second</span><span class="p">]</span>
+    <span class="err">@</span><span class="nv">operator: </span><span class="err">@</span><span class="nx">CONVERSIONS</span><span class="p">[</span><span class="nx">operator</span><span class="p">]</span> <span class="o">or</span> <span class="nx">operator</span>
+    <span class="err">@</span><span class="nv">flip: </span><span class="o">!!</span><span class="nx">flip</span>
+
+  <span class="nv">is_unary: </span><span class="o">-&gt;</span>
+    <span class="o">not</span> <span class="err">@</span><span class="nx">second</span>
+
+  <span class="nv">is_chainable: </span><span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nx">CHAINABLE</span><span class="p">.</span><span class="nx">indexOf</span><span class="p">(</span><span class="err">@</span><span class="nx">operator</span><span class="p">)</span> <span class="o">&gt;=</span> <span class="mi">0</span>
+
+  <span class="nv">compile_node: </span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="nv">o.operation: </span><span class="kc">true</span>
+    <span class="k">return</span> <span class="err">@</span><span class="nx">compile_chain</span><span class="p">(</span><span class="nx">o</span><span class="p">)</span>      <span class="k">if</span> <span class="err">@</span><span class="nx">is_chainable</span><span class="p">()</span> <span class="o">and</span> <span class="err">@</span><span class="nx">first</span><span class="p">.</span><span class="nx">unwrap</span><span class="p">()</span> <span class="k">instanceof</span> <span class="nx">OpNode</span> <span class="o">and</span> <span class="err">@</span><span class="nx">first</span><span class="p">.</span><span class="nx">unwrap</span><span class="p">().</span><span class="nx">is_chainable</span><span class="p">()</span>
+    <span class="k">return</span> <span class="err">@</span><span class="nx">compile_assignment</span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="k">if</span> <span class="err">@</span><span class="nx">ASSIGNMENT</span><span class="p">.</span><span class="nx">indexOf</span><span class="p">(</span><span class="err">@</span><span class="nx">operator</span><span class="p">)</span> <span class="o">&gt;=</span> <span class="mi">0</span>
+    <span class="k">return</span> <span class="err">@</span><span class="nx">compile_unary</span><span class="p">(</span><span class="nx">o</span><span class="p">)</span>      <span class="k">if</span> <span class="err">@</span><span class="nx">is_unary</span><span class="p">()</span>
+    <span class="k">return</span> <span class="err">@</span><span class="nx">compile_existence</span><span class="p">(</span><span class="nx">o</span><span class="p">)</span>  <span class="k">if</span> <span class="err">@</span><span class="nx">operator</span> <span class="o">is</span> <span class="s1">&#39;?&#39;</span>
+    <span class="p">[</span><span class="err">@</span><span class="nx">first</span><span class="p">.</span><span class="nx">compile</span><span class="p">(</span><span class="nx">o</span><span class="p">),</span> <span class="err">@</span><span class="nx">operator</span><span class="p">,</span> <span class="err">@</span><span class="nx">second</span><span class="p">.</span><span class="nx">compile</span><span class="p">(</span><span class="nx">o</span><span class="p">)].</span><span class="nx">join</span> <span class="s1">&#39; &#39;</span></pre></div>             </td>           </tr>                               <tr id="section-99">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-99">#</a>               </div>               <p>Mimic Python's chained comparisons when multiple comparison operators are
+used sequentially. For example:</p>
+
+<pre><code>bin/coffee -e "puts 50 &lt; 65 &gt; 10"
+true
+</code></pre>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">compile_chain: </span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="nv">shared: </span><span class="err">@</span><span class="nx">first</span><span class="p">.</span><span class="nx">unwrap</span><span class="p">().</span><span class="nx">second</span>
+    <span class="p">[</span><span class="err">@</span><span class="nx">first</span><span class="p">.</span><span class="nx">second</span><span class="p">,</span> <span class="nx">shared</span><span class="p">]</span><span class="o">:</span> <span class="nx">shared</span><span class="p">.</span><span class="nx">compile_reference</span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="k">if</span> <span class="nx">shared</span> <span class="k">instanceof</span> <span class="nx">CallNode</span>
+    <span class="p">[</span><span class="nx">first</span><span class="p">,</span> <span class="nx">second</span><span class="p">,</span> <span class="nx">shared</span><span class="p">]</span><span class="o">:</span> <span class="p">[</span><span class="err">@</span><span class="nx">first</span><span class="p">.</span><span class="nx">compile</span><span class="p">(</span><span class="nx">o</span><span class="p">),</span> <span class="err">@</span><span class="nx">second</span><span class="p">.</span><span class="nx">compile</span><span class="p">(</span><span class="nx">o</span><span class="p">),</span> <span class="nx">shared</span><span class="p">.</span><span class="nx">compile</span><span class="p">(</span><span class="nx">o</span><span class="p">)]</span>
+    <span class="s2">&quot;($first) &amp;&amp; ($shared $@operator $second)&quot;</span></pre></div>             </td>           </tr>                               <tr id="section-100">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-100">#</a>               </div>               <p>When compiling a conditional assignment, take care to ensure that the
+operands are only evaluated once, even though we have to reference them
+more than once.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">compile_assignment: </span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="p">[</span><span class="nx">first</span><span class="p">,</span> <span class="nx">second</span><span class="p">]</span><span class="o">:</span> <span class="p">[</span><span class="err">@</span><span class="nx">first</span><span class="p">.</span><span class="nx">compile</span><span class="p">(</span><span class="nx">o</span><span class="p">),</span> <span class="err">@</span><span class="nx">second</span><span class="p">.</span><span class="nx">compile</span><span class="p">(</span><span class="nx">o</span><span class="p">)]</span>
+    <span class="nx">o</span><span class="p">.</span><span class="nx">scope</span><span class="p">.</span><span class="nx">find</span><span class="p">(</span><span class="nx">first</span><span class="p">)</span> <span class="k">if</span> <span class="nx">first</span><span class="p">.</span><span class="nx">match</span><span class="p">(</span><span class="nx">IDENTIFIER</span><span class="p">)</span>
+    <span class="k">return</span> <span class="s2">&quot;$first = ${ ExistenceNode.compile_test(o, @first) } ? $first : $second&quot;</span> <span class="k">if</span> <span class="err">@</span><span class="nx">operator</span> <span class="o">is</span> <span class="s1">&#39;?=&#39;</span>
+    <span class="s2">&quot;$first = $first ${ @operator.substr(0, 2) } $second&quot;</span></pre></div>             </td>           </tr>                               <tr id="section-101">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-101">#</a>               </div>               <p>If this is an existence operator, we delegate to <code>ExistenceNode.compile_test</code>
+to give us the safe references for the variables.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">compile_existence: </span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="p">[</span><span class="nx">first</span><span class="p">,</span> <span class="nx">second</span><span class="p">]</span><span class="o">:</span> <span class="p">[</span><span class="err">@</span><span class="nx">first</span><span class="p">.</span><span class="nx">compile</span><span class="p">(</span><span class="nx">o</span><span class="p">),</span> <span class="err">@</span><span class="nx">second</span><span class="p">.</span><span class="nx">compile</span><span class="p">(</span><span class="nx">o</span><span class="p">)]</span>
+    <span class="nv">test: </span><span class="nx">ExistenceNode</span><span class="p">.</span><span class="nx">compile_test</span><span class="p">(</span><span class="nx">o</span><span class="p">,</span> <span class="err">@</span><span class="nx">first</span><span class="p">)</span>
+    <span class="s2">&quot;$test ? $first : $second&quot;</span></pre></div>             </td>           </tr>                               <tr id="section-102">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-102">#</a>               </div>               <p>Compile a unary <strong>OpNode</strong>.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">compile_unary: </span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="nv">space: </span><span class="k">if</span> <span class="err">@</span><span class="nx">PREFIX_OPERATORS</span><span class="p">.</span><span class="nx">indexOf</span><span class="p">(</span><span class="err">@</span><span class="nx">operator</span><span class="p">)</span> <span class="o">&gt;=</span> <span class="mi">0</span> <span class="k">then</span> <span class="s1">&#39; &#39;</span> <span class="k">else</span> <span class="s1">&#39;&#39;</span>
+    <span class="nv">parts: </span><span class="p">[</span><span class="err">@</span><span class="nx">operator</span><span class="p">,</span> <span class="nx">space</span><span class="p">,</span> <span class="err">@</span><span class="nx">first</span><span class="p">.</span><span class="nx">compile</span><span class="p">(</span><span class="nx">o</span><span class="p">)]</span>
+    <span class="nv">parts: </span><span class="nx">parts</span><span class="p">.</span><span class="nx">reverse</span><span class="p">()</span> <span class="k">if</span> <span class="err">@</span><span class="nx">flip</span>
+    <span class="nx">parts</span><span class="p">.</span><span class="nx">join</span><span class="p">(</span><span class="s1">&#39;&#39;</span><span class="p">)</span></pre></div>             </td>           </tr>                               <tr id="section-103">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-103">#</a>               </div>               <h3>TryNode</h3>             </td>             <td class="code">               <div class="highlight"><pre></pre></div>             </td>           </tr>                               <tr id="section-104">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-104">#</a>               </div>               <p>A classic <em>try/catch/finally</em> block.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">exports.TryNode: </span><span class="nx">class</span> <span class="nx">TryNode</span> <span class="k">extends</span> <span class="nx">BaseNode</span>
+  <span class="nv">type: </span><span class="s1">&#39;Try&#39;</span>
+
+  <span class="nv">constructor: </span><span class="p">(</span><span class="nx">attempt</span><span class="p">,</span> <span class="nx">error</span><span class="p">,</span> <span class="nx">recovery</span><span class="p">,</span> <span class="nx">ensure</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nv">children: </span><span class="nx">compact</span> <span class="p">[</span><span class="err">@</span><span class="nv">attempt: </span><span class="nx">attempt</span><span class="p">,</span> <span class="err">@</span><span class="nv">recovery: </span><span class="nx">recovery</span><span class="p">,</span> <span class="err">@</span><span class="nv">ensure: </span><span class="nx">ensure</span><span class="p">]</span>
+    <span class="err">@</span><span class="nv">error: </span><span class="nx">error</span>
+    <span class="k">this</span></pre></div>             </td>           </tr>                               <tr id="section-105">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-105">#</a>               </div>               <p>Compilation is more or less as you would expect -- the <em>finally</em> clause
+is optional, the <em>catch</em> is not.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">compile_node: </span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="nv">o.indent: </span>    <span class="err">@</span><span class="nx">idt</span><span class="p">(</span><span class="mi">1</span><span class="p">)</span>
+    <span class="nv">o.top: </span>       <span class="kc">true</span>
+    <span class="nv">attempt_part: </span><span class="err">@</span><span class="nx">attempt</span><span class="p">.</span><span class="nx">compile</span><span class="p">(</span><span class="nx">o</span><span class="p">)</span>
+    <span class="nv">error_part: </span>  <span class="k">if</span> <span class="err">@</span><span class="nx">error</span> <span class="k">then</span> <span class="s2">&quot; (${ @error.compile(o) }) &quot;</span> <span class="k">else</span> <span class="s1">&#39; &#39;</span>
+    <span class="nv">catch_part: </span>  <span class="s2">&quot;${ (@recovery or &#39;&#39;) and &#39; catch&#39; }$error_part{\n${ @recovery.compile(o) }\n$@tab}&quot;</span>
+    <span class="nv">finally_part: </span><span class="p">(</span><span class="err">@</span><span class="nx">ensure</span> <span class="o">or</span> <span class="s1">&#39;&#39;</span><span class="p">)</span> <span class="o">and</span> <span class="s1">&#39; finally {\n&#39;</span> <span class="o">+</span> <span class="err">@</span><span class="nx">ensure</span><span class="p">.</span><span class="nx">compile</span><span class="p">(</span><span class="nx">merge</span><span class="p">(</span><span class="nx">o</span><span class="p">,</span> <span class="p">{</span><span class="nv">returns: </span><span class="kc">null</span><span class="p">}))</span> <span class="o">+</span> <span class="s2">&quot;\n$@tab}&quot;</span>
+    <span class="s2">&quot;${@tab}try {\n$attempt_part\n$@tab}$catch_part$finally_part&quot;</span>
+
+<span class="nx">statement</span> <span class="nx">TryNode</span></pre></div>             </td>           </tr>                               <tr id="section-106">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-106">#</a>               </div>               <h3>ThrowNode</h3>             </td>             <td class="code">               <div class="highlight"><pre></pre></div>             </td>           </tr>                               <tr id="section-107">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-107">#</a>               </div>               <p>Simple node to throw an exception.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">exports.ThrowNode: </span><span class="nx">class</span> <span class="nx">ThrowNode</span> <span class="k">extends</span> <span class="nx">BaseNode</span>
+  <span class="nv">type: </span><span class="s1">&#39;Throw&#39;</span>
+
+  <span class="nv">constructor: </span><span class="p">(</span><span class="nx">expression</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nv">children: </span><span class="p">[</span><span class="err">@</span><span class="nv">expression: </span><span class="nx">expression</span><span class="p">]</span>
+
+  <span class="nv">compile_node: </span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="s2">&quot;${@tab}throw ${@expression.compile(o)};&quot;</span>
+
+<span class="nx">statement</span> <span class="nx">ThrowNode</span></pre></div>             </td>           </tr>                               <tr id="section-108">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-108">#</a>               </div>               <h3>ExistenceNode</h3>             </td>             <td class="code">               <div class="highlight"><pre></pre></div>             </td>           </tr>                               <tr id="section-109">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-109">#</a>               </div>               <p>Checks a variable for existence -- not <em>null</em> and not <em>undefined</em>. This is
+similar to <code>.nil?</code> in Ruby, and avoids having to consult a JavaScript truth
+table.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">exports.ExistenceNode: </span><span class="nx">class</span> <span class="nx">ExistenceNode</span> <span class="k">extends</span> <span class="nx">BaseNode</span>
+  <span class="nv">type: </span><span class="s1">&#39;Existence&#39;</span>
+
+  <span class="nv">constructor: </span><span class="p">(</span><span class="nx">expression</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nv">children: </span><span class="p">[</span><span class="err">@</span><span class="nv">expression: </span><span class="nx">expression</span><span class="p">]</span>
+
+  <span class="nv">compile_node: </span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="nx">ExistenceNode</span><span class="p">.</span><span class="nx">compile_test</span><span class="p">(</span><span class="nx">o</span><span class="p">,</span> <span class="err">@</span><span class="nx">expression</span><span class="p">)</span></pre></div>             </td>           </tr>                               <tr id="section-110">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-110">#</a>               </div>               <p>The meat of the <strong>ExistenceNode</strong> is in this static <code>compile_test</code> method
+because other nodes like to check the existence of their variables as well.
+Be careful not to double-evaluate anything.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">ExistenceNode.compile_test: </span><span class="p">(</span><span class="nx">o</span><span class="p">,</span> <span class="nx">variable</span><span class="p">)</span> <span class="o">-&gt;</span>
+  <span class="p">[</span><span class="nx">first</span><span class="p">,</span> <span class="nx">second</span><span class="p">]</span><span class="o">:</span> <span class="p">[</span><span class="nx">variable</span><span class="p">,</span> <span class="nx">variable</span><span class="p">]</span>
+  <span class="k">if</span> <span class="nx">variable</span> <span class="k">instanceof</span> <span class="nx">CallNode</span> <span class="o">or</span> <span class="p">(</span><span class="nx">variable</span> <span class="k">instanceof</span> <span class="nx">ValueNode</span> <span class="o">and</span> <span class="nx">variable</span><span class="p">.</span><span class="nx">has_properties</span><span class="p">())</span>
+    <span class="p">[</span><span class="nx">first</span><span class="p">,</span> <span class="nx">second</span><span class="p">]</span><span class="o">:</span> <span class="nx">variable</span><span class="p">.</span><span class="nx">compile_reference</span><span class="p">(</span><span class="nx">o</span><span class="p">)</span>
+  <span class="p">[</span><span class="nx">first</span><span class="p">,</span> <span class="nx">second</span><span class="p">]</span><span class="o">:</span> <span class="p">[</span><span class="nx">first</span><span class="p">.</span><span class="nx">compile</span><span class="p">(</span><span class="nx">o</span><span class="p">),</span> <span class="nx">second</span><span class="p">.</span><span class="nx">compile</span><span class="p">(</span><span class="nx">o</span><span class="p">)]</span>
+  <span class="s2">&quot;(typeof $first !== \&quot;undefined\&quot; &amp;&amp; $second !== null)&quot;</span></pre></div>             </td>           </tr>                               <tr id="section-111">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-111">#</a>               </div>               <h3>ParentheticalNode</h3>             </td>             <td class="code">               <div class="highlight"><pre></pre></div>             </td>           </tr>                               <tr id="section-112">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-112">#</a>               </div>               <p>An extra set of parentheses, specified explicitly in the source. At one time
+we tried to clean up the results by detecting and removing redundant
+parentheses, but no longer -- you can put in as many as you please.</p>
+
+<p>Parentheses are a good way to force any statement to become an expression.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">exports.ParentheticalNode: </span><span class="nx">class</span> <span class="nx">ParentheticalNode</span> <span class="k">extends</span> <span class="nx">BaseNode</span>
+  <span class="nv">type: </span><span class="s1">&#39;Paren&#39;</span>
+
+  <span class="nv">constructor: </span><span class="p">(</span><span class="nx">expression</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nv">children: </span><span class="p">[</span><span class="err">@</span><span class="nv">expression: </span><span class="nx">expression</span><span class="p">]</span>
+
+  <span class="nv">is_statement: </span><span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nx">expression</span><span class="p">.</span><span class="nx">is_statement</span><span class="p">()</span>
+
+  <span class="nv">compile_node: </span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="nv">code: </span><span class="err">@</span><span class="nx">expression</span><span class="p">.</span><span class="nx">compile</span><span class="p">(</span><span class="nx">o</span><span class="p">)</span>
+    <span class="k">return</span> <span class="nx">code</span> <span class="k">if</span> <span class="err">@</span><span class="nx">is_statement</span><span class="p">()</span>
+    <span class="nv">l: </span>   <span class="nx">code</span><span class="p">.</span><span class="nx">length</span>
+    <span class="nv">code: </span><span class="nx">code</span><span class="p">.</span><span class="nx">substr</span><span class="p">(</span><span class="nx">o</span><span class="p">,</span> <span class="nx">l</span><span class="o">-</span><span class="mi">1</span><span class="p">)</span> <span class="k">if</span> <span class="nx">code</span><span class="p">.</span><span class="nx">substr</span><span class="p">(</span><span class="nx">l</span><span class="o">-</span><span class="mi">1</span><span class="p">,</span> <span class="mi">1</span><span class="p">)</span> <span class="o">is</span> <span class="s1">&#39;;&#39;</span>
+    <span class="s2">&quot;($code)&quot;</span></pre></div>             </td>           </tr>                               <tr id="section-113">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-113">#</a>               </div>               <h3>ForNode</h3>             </td>             <td class="code">               <div class="highlight"><pre></pre></div>             </td>           </tr>                               <tr id="section-114">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-114">#</a>               </div>               <p>CoffeeScript's replacement for the <em>for</em> loop is our array and object
+comprehensions, that compile into <em>for</em> loops here. They also act as an
+expression, able to return the result of each filtered iteration.</p>
+
+<p>Unlike Python array comprehensions, they can be multi-line, and you can pass
+the current index of the loop as a second parameter. Unlike Ruby blocks,
+you can map and filter in a single pass.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">exports.ForNode: </span><span class="nx">class</span> <span class="nx">ForNode</span> <span class="k">extends</span> <span class="nx">BaseNode</span>
+  <span class="nv">type: </span><span class="s1">&#39;For&#39;</span>
+
+  <span class="nv">constructor: </span><span class="p">(</span><span class="nx">body</span><span class="p">,</span> <span class="nx">source</span><span class="p">,</span> <span class="nx">name</span><span class="p">,</span> <span class="nx">index</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nv">body: </span>   <span class="nx">body</span>
+    <span class="err">@</span><span class="nv">name: </span>   <span class="nx">name</span>
+    <span class="err">@</span><span class="nv">index: </span>  <span class="nx">index</span> <span class="o">or</span> <span class="kc">null</span>
+    <span class="err">@</span><span class="nv">source: </span> <span class="nx">source</span><span class="p">.</span><span class="nx">source</span>
+    <span class="err">@</span><span class="nv">filter: </span> <span class="nx">source</span><span class="p">.</span><span class="nx">filter</span>
+    <span class="err">@</span><span class="nv">step: </span>   <span class="nx">source</span><span class="p">.</span><span class="nx">step</span>
+    <span class="err">@</span><span class="nv">object: </span> <span class="o">!!</span><span class="nx">source</span><span class="p">.</span><span class="nx">object</span>
+    <span class="p">[</span><span class="err">@</span><span class="nx">name</span><span class="p">,</span> <span class="err">@</span><span class="nx">index</span><span class="p">]</span><span class="o">:</span> <span class="p">[</span><span class="err">@</span><span class="nx">index</span><span class="p">,</span> <span class="err">@</span><span class="nx">name</span><span class="p">]</span> <span class="k">if</span> <span class="err">@</span><span class="nx">object</span>
+    <span class="err">@</span><span class="nv">children: </span><span class="nx">compact</span> <span class="p">[</span><span class="err">@</span><span class="nx">body</span><span class="p">,</span> <span class="err">@</span><span class="nx">source</span><span class="p">,</span> <span class="err">@</span><span class="nx">filter</span><span class="p">]</span>
+
+  <span class="nv">top_sensitive: </span><span class="o">-&gt;</span>
+    <span class="kc">true</span></pre></div>             </td>           </tr>                               <tr id="section-115">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-115">#</a>               </div>               <p>Welcome to the hairiest method in all of CoffeeScript. Handles the inner
+loop, filtering, stepping, and result saving for array, object, and range
+comprehensions. Some of the generated code can be shared in common, and
+some cannot.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">compile_node: </span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="nv">top_level: </span>     <span class="nx">del</span><span class="p">(</span><span class="nx">o</span><span class="p">,</span> <span class="s1">&#39;top&#39;</span><span class="p">)</span> <span class="o">and</span> <span class="o">not</span> <span class="nx">o</span><span class="p">.</span><span class="nx">returns</span>
+    <span class="nv">range: </span>         <span class="err">@</span><span class="nx">source</span> <span class="k">instanceof</span> <span class="nx">ValueNode</span> <span class="o">and</span> <span class="err">@</span><span class="nx">source</span><span class="p">.</span><span class="nx">base</span> <span class="k">instanceof</span> <span class="nx">RangeNode</span> <span class="o">and</span> <span class="o">not</span> <span class="err">@</span><span class="nx">source</span><span class="p">.</span><span class="nx">properties</span><span class="p">.</span><span class="nx">length</span>
+    <span class="nv">source: </span>        <span class="k">if</span> <span class="nx">range</span> <span class="k">then</span> <span class="err">@</span><span class="nx">source</span><span class="p">.</span><span class="nx">base</span> <span class="k">else</span> <span class="err">@</span><span class="nx">source</span>
+    <span class="nv">scope: </span>         <span class="nx">o</span><span class="p">.</span><span class="nx">scope</span>
+    <span class="nv">name: </span>          <span class="err">@</span><span class="nx">name</span> <span class="o">and</span> <span class="err">@</span><span class="nx">name</span><span class="p">.</span><span class="nx">compile</span> <span class="nx">o</span>
+    <span class="nv">index: </span>         <span class="err">@</span><span class="nx">index</span> <span class="o">and</span> <span class="err">@</span><span class="nx">index</span><span class="p">.</span><span class="nx">compile</span> <span class="nx">o</span>
+    <span class="nv">name_found: </span>    <span class="nx">name</span> <span class="o">and</span> <span class="nx">scope</span><span class="p">.</span><span class="nx">find</span> <span class="nx">name</span>
+    <span class="nv">index_found: </span>   <span class="nx">index</span> <span class="o">and</span> <span class="nx">scope</span><span class="p">.</span><span class="nx">find</span> <span class="nx">index</span>
+    <span class="nv">body_dent: </span>     <span class="err">@</span><span class="nx">idt</span><span class="p">(</span><span class="mi">1</span><span class="p">)</span>
+    <span class="nv">rvar: </span>          <span class="nx">scope</span><span class="p">.</span><span class="nx">free_variable</span><span class="p">()</span> <span class="nx">unless</span> <span class="nx">top_level</span>
+    <span class="nv">svar: </span>          <span class="nx">scope</span><span class="p">.</span><span class="nx">free_variable</span><span class="p">()</span>
+    <span class="nv">ivar: </span>          <span class="k">if</span> <span class="nx">range</span> <span class="k">then</span> <span class="nx">name</span> <span class="k">else</span> <span class="nx">index</span> <span class="o">or</span> <span class="nx">scope</span><span class="p">.</span><span class="nx">free_variable</span><span class="p">()</span>
+    <span class="nv">var_part: </span>      <span class="s1">&#39;&#39;</span>
+    <span class="nv">body: </span>          <span class="nx">Expressions</span><span class="p">.</span><span class="nx">wrap</span><span class="p">([</span><span class="err">@</span><span class="nx">body</span><span class="p">])</span>
+    <span class="k">if</span> <span class="nx">range</span>
+      <span class="nv">index_var: </span>   <span class="nx">scope</span><span class="p">.</span><span class="nx">free_variable</span><span class="p">()</span>
+      <span class="nv">source_part: </span> <span class="nx">source</span><span class="p">.</span><span class="nx">compile_variables</span> <span class="nx">o</span>
+      <span class="nv">for_part: </span>    <span class="nx">source</span><span class="p">.</span><span class="nx">compile</span> <span class="nx">merge</span> <span class="nx">o</span><span class="p">,</span> <span class="p">{</span><span class="nv">index: </span><span class="nx">ivar</span><span class="p">,</span> <span class="nv">step: </span><span class="err">@</span><span class="nx">step</span><span class="p">}</span>
+      <span class="nv">for_part: </span>    <span class="s2">&quot;$index_var = 0, $for_part, $index_var++&quot;</span>
+    <span class="k">else</span>
+      <span class="nv">index_var: </span>   <span class="kc">null</span>
+      <span class="nv">source_part: </span> <span class="s2">&quot;$svar = ${ @source.compile(o) };\n$@tab&quot;</span>
+      <span class="nv">var_part: </span>    <span class="s2">&quot;$body_dent$name = $svar[$ivar];\n&quot;</span> <span class="k">if</span> <span class="nx">name</span>
+      <span class="k">if</span> <span class="o">not</span> <span class="err">@</span><span class="nx">object</span>
+        <span class="nv">lvar: </span>      <span class="nx">scope</span><span class="p">.</span><span class="nx">free_variable</span><span class="p">()</span>
+        <span class="nv">step_part: </span> <span class="k">if</span> <span class="err">@</span><span class="nx">step</span> <span class="k">then</span> <span class="s2">&quot;$ivar += ${ @step.compile(o) }&quot;</span> <span class="k">else</span> <span class="s2">&quot;$ivar++&quot;</span>
+        <span class="nv">for_part: </span>  <span class="s2">&quot;$ivar = 0, $lvar = ${svar}.length; $ivar &lt; $lvar; $step_part&quot;</span>
+    <span class="nv">set_result: </span>    <span class="k">if</span> <span class="nx">rvar</span> <span class="k">then</span> <span class="err">@</span><span class="nx">idt</span><span class="p">()</span> <span class="o">+</span> <span class="nx">rvar</span> <span class="o">+</span> <span class="s1">&#39; = []; &#39;</span> <span class="k">else</span> <span class="err">@</span><span class="nx">idt</span><span class="p">()</span>
+    <span class="nv">return_result: </span> <span class="nx">rvar</span> <span class="o">or</span> <span class="s1">&#39;&#39;</span>
+    <span class="nv">body: </span>          <span class="nx">ClosureNode</span><span class="p">.</span><span class="nx">wrap</span><span class="p">(</span><span class="nx">body</span><span class="p">,</span> <span class="kc">true</span><span class="p">)</span> <span class="k">if</span> <span class="nx">top_level</span> <span class="o">and</span> <span class="err">@</span><span class="nx">contains</span> <span class="p">(</span><span class="nx">n</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="nx">n</span> <span class="k">instanceof</span> <span class="nx">CodeNode</span>
+    <span class="nv">body: </span>          <span class="nx">PushNode</span><span class="p">.</span><span class="nx">wrap</span><span class="p">(</span><span class="nx">rvar</span><span class="p">,</span> <span class="nx">body</span><span class="p">)</span> <span class="nx">unless</span> <span class="nx">top_level</span>
+    <span class="k">if</span> <span class="nx">o</span><span class="p">.</span><span class="nx">returns</span>
+      <span class="nv">return_result: </span><span class="s1">&#39;return &#39;</span> <span class="o">+</span> <span class="nx">return_result</span>
+      <span class="nx">del</span> <span class="nx">o</span><span class="p">,</span> <span class="s1">&#39;returns&#39;</span>
+      <span class="nv">body: </span>        <span class="k">new</span> <span class="nx">IfNode</span><span class="p">(</span><span class="err">@</span><span class="nx">filter</span><span class="p">,</span> <span class="nx">body</span><span class="p">,</span> <span class="kc">null</span><span class="p">,</span> <span class="p">{</span><span class="nv">statement: </span><span class="kc">true</span><span class="p">})</span> <span class="k">if</span> <span class="err">@</span><span class="nx">filter</span>
+    <span class="k">else</span> <span class="k">if</span> <span class="err">@</span><span class="nx">filter</span>
+      <span class="nv">body: </span>        <span class="nx">Expressions</span><span class="p">.</span><span class="nx">wrap</span><span class="p">([</span><span class="k">new</span> <span class="nx">IfNode</span><span class="p">(</span><span class="err">@</span><span class="nx">filter</span><span class="p">,</span> <span class="nx">body</span><span class="p">)])</span>
+    <span class="k">if</span> <span class="err">@</span><span class="nx">object</span>
+      <span class="nx">o</span><span class="p">.</span><span class="nx">scope</span><span class="p">.</span><span class="nx">assign</span><span class="p">(</span><span class="s1">&#39;__hasProp&#39;</span><span class="p">,</span> <span class="s1">&#39;Object.prototype.hasOwnProperty&#39;</span><span class="p">,</span> <span class="kc">true</span><span class="p">)</span>
+      <span class="nv">for_part: </span><span class="s2">&quot;$ivar in $svar) { if (__hasProp.call($svar, $ivar)&quot;</span>
+    <span class="nv">return_result: </span> <span class="s2">&quot;\n$@tab$return_result;&quot;</span> <span class="nx">unless</span> <span class="nx">top_level</span>
+    <span class="nv">body: </span>          <span class="nx">body</span><span class="p">.</span><span class="nx">compile</span><span class="p">(</span><span class="nx">merge</span><span class="p">(</span><span class="nx">o</span><span class="p">,</span> <span class="p">{</span><span class="nv">indent: </span><span class="nx">body_dent</span><span class="p">,</span> <span class="nv">top: </span><span class="kc">true</span><span class="p">}))</span>
+    <span class="nv">vars: </span>          <span class="k">if</span> <span class="nx">range</span> <span class="k">then</span> <span class="nx">name</span> <span class="k">else</span> <span class="s2">&quot;$name, $ivar&quot;</span>
+    <span class="nv">close: </span>         <span class="k">if</span> <span class="err">@</span><span class="nx">object</span> <span class="k">then</span> <span class="s1">&#39;}}\n&#39;</span> <span class="k">else</span> <span class="s1">&#39;}\n&#39;</span>
+    <span class="s2">&quot;$set_result${source_part}for ($for_part) {\n$var_part$body\n$@tab$close$@tab$return_result&quot;</span>
+
+<span class="nx">statement</span> <span class="nx">ForNode</span></pre></div>             </td>           </tr>                               <tr id="section-116">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-116">#</a>               </div>               <h3>IfNode</h3>             </td>             <td class="code">               <div class="highlight"><pre></pre></div>             </td>           </tr>                               <tr id="section-117">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-117">#</a>               </div>               <p><em>If/else</em> statements. Our <em>switch/when</em> will be compiled into this. Acts as an
+expression by pushing down requested returns to the last line of each clause.</p>
+
+<p>Single-expression <strong>IfNodes</strong> are compiled into ternary operators if possible,
+because ternaries are already proper expressions, and don't need conversion.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">exports.IfNode: </span><span class="nx">class</span> <span class="nx">IfNode</span> <span class="k">extends</span> <span class="nx">BaseNode</span>
+  <span class="nv">type: </span><span class="s1">&#39;If&#39;</span>
+
+  <span class="nv">constructor: </span><span class="p">(</span><span class="nx">condition</span><span class="p">,</span> <span class="nx">body</span><span class="p">,</span> <span class="nx">else_body</span><span class="p">,</span> <span class="nx">tags</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nv">condition: </span><span class="nx">condition</span>
+    <span class="err">@</span><span class="nv">body: </span>     <span class="nx">body</span> <span class="o">and</span> <span class="nx">body</span><span class="p">.</span><span class="nx">unwrap</span><span class="p">()</span>
+    <span class="err">@</span><span class="nv">else_body: </span><span class="nx">else_body</span> <span class="o">and</span> <span class="nx">else_body</span><span class="p">.</span><span class="nx">unwrap</span><span class="p">()</span>
+    <span class="err">@</span><span class="nv">children: </span> <span class="nx">compact</span> <span class="p">[</span><span class="err">@</span><span class="nx">condition</span><span class="p">,</span> <span class="err">@</span><span class="nx">body</span><span class="p">,</span> <span class="err">@</span><span class="nx">else_body</span><span class="p">]</span>
+    <span class="err">@</span><span class="nv">tags: </span>     <span class="nx">tags</span> <span class="o">or</span> <span class="p">{}</span>
+    <span class="err">@</span><span class="nv">multiple: </span> <span class="kc">true</span> <span class="k">if</span> <span class="err">@</span><span class="nx">condition</span> <span class="k">instanceof</span> <span class="nb">Array</span>
+    <span class="err">@</span><span class="nv">condition: </span><span class="k">new</span> <span class="nx">OpNode</span><span class="p">(</span><span class="s1">&#39;!&#39;</span><span class="p">,</span> <span class="k">new</span> <span class="nx">ParentheticalNode</span><span class="p">(</span><span class="err">@</span><span class="nx">condition</span><span class="p">))</span> <span class="k">if</span> <span class="err">@</span><span class="nx">tags</span><span class="p">.</span><span class="nx">invert</span></pre></div>             </td>           </tr>                               <tr id="section-118">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-118">#</a>               </div>               <p>Add a new <em>else</em> clause to this <strong>IfNode</strong>, or push it down to the bottom
+of the chain recursively.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">push: </span><span class="p">(</span><span class="nx">else_body</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="nv">eb: </span><span class="nx">else_body</span><span class="p">.</span><span class="nx">unwrap</span><span class="p">()</span>
+    <span class="k">if</span> <span class="err">@</span><span class="nx">else_body</span> <span class="k">then</span> <span class="err">@</span><span class="nx">else_body</span><span class="p">.</span><span class="nx">push</span><span class="p">(</span><span class="nx">eb</span><span class="p">)</span> <span class="k">else</span> <span class="err">@</span><span class="nv">else_body: </span><span class="nx">eb</span>
+    <span class="k">this</span>
+
+  <span class="nv">force_statement: </span><span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nv">tags.statement: </span><span class="kc">true</span>
+    <span class="k">this</span></pre></div>             </td>           </tr>                               <tr id="section-119">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-119">#</a>               </div>               <p>Tag a chain of <strong>IfNodes</strong> with their object(s) to switch on for equality
+tests. <code>rewrite_switch</code> will perform the actual change at compile time.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">rewrite_condition: </span><span class="p">(</span><span class="nx">expression</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nv">switcher: </span><span class="nx">expression</span>
+    <span class="k">this</span></pre></div>             </td>           </tr>                               <tr id="section-120">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-120">#</a>               </div>               <p>Rewrite a chain of <strong>IfNodes</strong> with their switch condition for equality.
+Ensure that the switch expression isn't evaluated more than once.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">rewrite_switch: </span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="nv">assigner: </span><span class="err">@</span><span class="nx">switcher</span>
+    <span class="k">if</span> <span class="o">not</span> <span class="p">(</span><span class="err">@</span><span class="nx">switcher</span><span class="p">.</span><span class="nx">unwrap</span><span class="p">()</span> <span class="k">instanceof</span> <span class="nx">LiteralNode</span><span class="p">)</span>
+      <span class="nv">variable: </span><span class="nx">literal</span><span class="p">(</span><span class="nx">o</span><span class="p">.</span><span class="nx">scope</span><span class="p">.</span><span class="nx">free_variable</span><span class="p">())</span>
+      <span class="nv">assigner: </span><span class="k">new</span> <span class="nx">AssignNode</span><span class="p">(</span><span class="nx">variable</span><span class="p">,</span> <span class="err">@</span><span class="nx">switcher</span><span class="p">)</span>
+      <span class="err">@</span><span class="nv">switcher: </span><span class="nx">variable</span>
+    <span class="err">@</span><span class="nv">condition: </span><span class="k">if</span> <span class="err">@</span><span class="nx">multiple</span>
+      <span class="k">for</span> <span class="nx">cond</span><span class="p">,</span> <span class="nx">i</span> <span class="k">in</span> <span class="err">@</span><span class="nx">condition</span>
+        <span class="k">new</span> <span class="nx">OpNode</span><span class="p">(</span><span class="s1">&#39;is&#39;</span><span class="p">,</span> <span class="p">(</span><span class="k">if</span> <span class="nx">i</span> <span class="o">is</span> <span class="mi">0</span> <span class="k">then</span> <span class="nx">assigner</span> <span class="k">else</span> <span class="err">@</span><span class="nx">switcher</span><span class="p">),</span> <span class="nx">cond</span><span class="p">)</span>
+    <span class="k">else</span>
+      <span class="k">new</span> <span class="nx">OpNode</span><span class="p">(</span><span class="s1">&#39;is&#39;</span><span class="p">,</span> <span class="nx">assigner</span><span class="p">,</span> <span class="err">@</span><span class="nx">condition</span><span class="p">)</span>
+    <span class="err">@</span><span class="nx">else_body</span><span class="p">.</span><span class="nx">rewrite_condition</span><span class="p">(</span><span class="err">@</span><span class="nx">switcher</span><span class="p">)</span> <span class="k">if</span> <span class="err">@</span><span class="nx">is_chain</span><span class="p">()</span>
+    <span class="k">this</span></pre></div>             </td>           </tr>                               <tr id="section-121">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-121">#</a>               </div>               <p>Rewrite a chain of <strong>IfNodes</strong> to add a default case as the final <em>else</em>.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">add_else: </span><span class="p">(</span><span class="nx">exprs</span><span class="p">,</span> <span class="nx">statement</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="k">if</span> <span class="err">@</span><span class="nx">is_chain</span><span class="p">()</span>
+      <span class="err">@</span><span class="nx">else_body</span><span class="p">.</span><span class="nx">add_else</span> <span class="nx">exprs</span><span class="p">,</span> <span class="nx">statement</span>
+    <span class="k">else</span>
+      <span class="nv">exprs: </span><span class="nx">exprs</span><span class="p">.</span><span class="nx">unwrap</span><span class="p">()</span> <span class="nx">unless</span> <span class="nx">statement</span>
+      <span class="err">@</span><span class="nx">children</span><span class="p">.</span><span class="nx">push</span> <span class="err">@</span><span class="nv">else_body: </span><span class="nx">exprs</span>
+    <span class="k">this</span></pre></div>             </td>           </tr>                               <tr id="section-122">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-122">#</a>               </div>               <p>If the <code>else_body</code> is an <strong>IfNode</strong> itself, then we've got an <em>if-else</em> chain.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">is_chain: </span><span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nx">chain</span> <span class="o">||=</span> <span class="err">@</span><span class="nx">else_body</span> <span class="o">and</span> <span class="err">@</span><span class="nx">else_body</span> <span class="k">instanceof</span> <span class="nx">IfNode</span></pre></div>             </td>           </tr>                               <tr id="section-123">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-123">#</a>               </div>               <p>The <strong>IfNode</strong> only compiles into a statement if either of its bodies needs
+to be a statement. Otherwise a ternary is safe.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">is_statement: </span><span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nx">statement</span> <span class="o">||=</span> <span class="o">!!</span><span class="p">(</span><span class="err">@</span><span class="nx">comment</span> <span class="o">or</span> <span class="err">@</span><span class="nx">tags</span><span class="p">.</span><span class="nx">statement</span> <span class="o">or</span> <span class="err">@</span><span class="nx">body</span><span class="p">.</span><span class="nx">is_statement</span><span class="p">()</span> <span class="o">or</span> <span class="p">(</span><span class="err">@</span><span class="nx">else_body</span> <span class="o">and</span> <span class="err">@</span><span class="nx">else_body</span><span class="p">.</span><span class="nx">is_statement</span><span class="p">()))</span>
+
+  <span class="nv">compile_condition: </span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="p">(</span><span class="nx">cond</span><span class="p">.</span><span class="nx">compile</span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="k">for</span> <span class="nx">cond</span> <span class="k">in</span> <span class="nx">flatten</span><span class="p">([</span><span class="err">@</span><span class="nx">condition</span><span class="p">])).</span><span class="nx">join</span><span class="p">(</span><span class="s1">&#39; || &#39;</span><span class="p">)</span>
+
+  <span class="nv">compile_node: </span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="k">if</span> <span class="err">@</span><span class="nx">is_statement</span><span class="p">()</span> <span class="k">then</span> <span class="err">@</span><span class="nx">compile_statement</span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="k">else</span> <span class="err">@</span><span class="nx">compile_ternary</span><span class="p">(</span><span class="nx">o</span><span class="p">)</span></pre></div>             </td>           </tr>                               <tr id="section-124">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-124">#</a>               </div>               <p>Compile the <strong>IfNode</strong> as a regular <em>if-else</em> statement. Flattened chains
+force inner <em>else</em> bodies into statement form.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">compile_statement: </span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nx">rewrite_switch</span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="k">if</span> <span class="err">@</span><span class="nx">switcher</span>
+    <span class="nv">child: </span>       <span class="nx">del</span> <span class="nx">o</span><span class="p">,</span> <span class="s1">&#39;chain_child&#39;</span>
+    <span class="nv">cond_o: </span>      <span class="nx">merge</span> <span class="nx">o</span>
+    <span class="nx">del</span> <span class="nx">cond_o</span><span class="p">,</span> <span class="s1">&#39;returns&#39;</span>
+    <span class="nv">o.indent: </span>    <span class="err">@</span><span class="nx">idt</span><span class="p">(</span><span class="mi">1</span><span class="p">)</span>
+    <span class="nv">o.top: </span>       <span class="kc">true</span>
+    <span class="nv">if_dent: </span>     <span class="k">if</span> <span class="nx">child</span> <span class="k">then</span> <span class="s1">&#39;&#39;</span> <span class="k">else</span> <span class="err">@</span><span class="nx">idt</span><span class="p">()</span>
+    <span class="nv">com_dent: </span>    <span class="k">if</span> <span class="nx">child</span> <span class="k">then</span> <span class="err">@</span><span class="nx">idt</span><span class="p">()</span> <span class="k">else</span> <span class="s1">&#39;&#39;</span>
+    <span class="nv">prefix: </span>      <span class="k">if</span> <span class="err">@</span><span class="nx">comment</span> <span class="k">then</span> <span class="s2">&quot;${ @comment.compile(cond_o) }\n$com_dent&quot;</span> <span class="k">else</span> <span class="s1">&#39;&#39;</span>
+    <span class="nv">body: </span>        <span class="nx">Expressions</span><span class="p">.</span><span class="nx">wrap</span><span class="p">([</span><span class="err">@</span><span class="nx">body</span><span class="p">]).</span><span class="nx">compile</span><span class="p">(</span><span class="nx">o</span><span class="p">)</span>
+    <span class="nv">if_part: </span>     <span class="s2">&quot;$prefix${if_dent}if (${ @compile_condition(cond_o) }) {\n$body\n$@tab}&quot;</span>
+    <span class="k">return</span> <span class="nx">if_part</span> <span class="nx">unless</span> <span class="err">@</span><span class="nx">else_body</span>
+    <span class="nv">else_part: </span><span class="k">if</span> <span class="err">@</span><span class="nx">is_chain</span><span class="p">()</span>
+      <span class="s1">&#39; else &#39;</span> <span class="o">+</span> <span class="err">@</span><span class="nx">else_body</span><span class="p">.</span><span class="nx">compile</span><span class="p">(</span><span class="nx">merge</span><span class="p">(</span><span class="nx">o</span><span class="p">,</span> <span class="p">{</span><span class="nv">indent: </span><span class="err">@</span><span class="nx">idt</span><span class="p">(),</span> <span class="nv">chain_child: </span><span class="kc">true</span><span class="p">}))</span>
+    <span class="k">else</span>
+      <span class="s2">&quot; else {\n${ Expressions.wrap([@else_body]).compile(o) }\n$@tab}&quot;</span>
+    <span class="s2">&quot;$if_part$else_part&quot;</span></pre></div>             </td>           </tr>                               <tr id="section-125">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-125">#</a>               </div>               <p>Compile the IfNode as a ternary operator.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">compile_ternary: </span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="nv">if_part: </span>   <span class="err">@</span><span class="nx">condition</span><span class="p">.</span><span class="nx">compile</span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="o">+</span> <span class="s1">&#39; ? &#39;</span> <span class="o">+</span> <span class="err">@</span><span class="nx">body</span><span class="p">.</span><span class="nx">compile</span><span class="p">(</span><span class="nx">o</span><span class="p">)</span>
+    <span class="nv">else_part: </span> <span class="k">if</span> <span class="err">@</span><span class="nx">else_body</span> <span class="k">then</span> <span class="err">@</span><span class="nx">else_body</span><span class="p">.</span><span class="nx">compile</span><span class="p">(</span><span class="nx">o</span><span class="p">)</span> <span class="k">else</span> <span class="s1">&#39;null&#39;</span>
+    <span class="s2">&quot;$if_part : $else_part&quot;</span></pre></div>             </td>           </tr>                               <tr id="section-126">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-126">#</a>               </div>               <h2>Constants</h2>             </td>             <td class="code">               <div class="highlight"><pre></pre></div>             </td>           </tr>                               <tr id="section-127">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-127">#</a>               </div>               <p>Tabs are two spaces for pretty printing.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">TAB: </span><span class="s1">&#39;  &#39;</span></pre></div>             </td>           </tr>                               <tr id="section-128">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-128">#</a>               </div>               <p>Trim out all trailing whitespace, so that the generated code plays nice
+with Git.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">TRAILING_WHITESPACE: </span><span class="sr">/\s+$/gm</span></pre></div>             </td>           </tr>                               <tr id="section-129">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-129">#</a>               </div>               <p>Keep this identifier regex in sync with the Lexer.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">IDENTIFIER: </span><span class="sr">/^[a-zA-Z$_](\w|\$)*$/</span></pre></div>             </td>           </tr>                               <tr id="section-130">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-130">#</a>               </div>               <h2>Utility Functions</h2>             </td>             <td class="code">               <div class="highlight"><pre></pre></div>             </td>           </tr>                               <tr id="section-131">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-131">#</a>               </div>               <p>Merge objects, returning a fresh copy with attributes from both sides.
+Used every time <code>compile</code> is called, to allow properties in the options hash
+to propagate down the tree without polluting other branches.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">merge: </span><span class="p">(</span><span class="nx">options</span><span class="p">,</span> <span class="nx">overrides</span><span class="p">)</span> <span class="o">-&gt;</span>
+  <span class="nv">fresh: </span><span class="p">{}</span>
+  <span class="p">(</span><span class="nx">fresh</span><span class="p">[</span><span class="nx">key</span><span class="p">]</span><span class="o">:</span> <span class="nx">val</span><span class="p">)</span> <span class="k">for</span> <span class="nx">key</span><span class="p">,</span> <span class="nx">val</span> <span class="k">of</span> <span class="nx">options</span>
+  <span class="p">(</span><span class="nx">fresh</span><span class="p">[</span><span class="nx">key</span><span class="p">]</span><span class="o">:</span> <span class="nx">val</span><span class="p">)</span> <span class="k">for</span> <span class="nx">key</span><span class="p">,</span> <span class="nx">val</span> <span class="k">of</span> <span class="nx">overrides</span> <span class="k">if</span> <span class="nx">overrides</span>
+  <span class="nx">fresh</span></pre></div>             </td>           </tr>                               <tr id="section-132">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-132">#</a>               </div>               <p>Trim out all falsy values from an array.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">compact: </span><span class="p">(</span><span class="nx">array</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="nx">item</span> <span class="k">for</span> <span class="nx">item</span> <span class="k">in</span> <span class="nx">array</span> <span class="k">when</span> <span class="nx">item</span></pre></div>             </td>           </tr>                               <tr id="section-133">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-133">#</a>               </div>               <p>Return a completely flattened version of an array. Handy for getting a
+list of <code>children</code>.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">flatten: </span><span class="p">(</span><span class="nx">array</span><span class="p">)</span> <span class="o">-&gt;</span>
+  <span class="nv">memo: </span><span class="p">[]</span>
+  <span class="k">for</span> <span class="nx">item</span> <span class="k">in</span> <span class="nx">array</span>
+    <span class="k">if</span> <span class="nx">item</span> <span class="k">instanceof</span> <span class="nb">Array</span> <span class="k">then</span> <span class="nv">memo: </span><span class="nx">memo</span><span class="p">.</span><span class="nx">concat</span><span class="p">(</span><span class="nx">item</span><span class="p">)</span> <span class="k">else</span> <span class="nx">memo</span><span class="p">.</span><span class="nx">push</span><span class="p">(</span><span class="nx">item</span><span class="p">)</span>
+  <span class="nx">memo</span></pre></div>             </td>           </tr>                               <tr id="section-134">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-134">#</a>               </div>               <p>Delete a key from an object, returning the value. Useful when a node is
+looking for a particular method in an options hash.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">del: </span><span class="p">(</span><span class="nx">obj</span><span class="p">,</span> <span class="nx">key</span><span class="p">)</span> <span class="o">-&gt;</span>
+  <span class="nv">val: </span><span class="nx">obj</span><span class="p">[</span><span class="nx">key</span><span class="p">]</span>
+  <span class="k">delete</span> <span class="nx">obj</span><span class="p">[</span><span class="nx">key</span><span class="p">]</span>
+  <span class="nx">val</span></pre></div>             </td>           </tr>                               <tr id="section-135">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-135">#</a>               </div>               <p>Handy helper for a generating LiteralNode.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">literal: </span><span class="p">(</span><span class="nx">name</span><span class="p">)</span> <span class="o">-&gt;</span>
+  <span class="k">new</span> <span class="nx">LiteralNode</span><span class="p">(</span><span class="nx">name</span><span class="p">)</span>
+
+</pre></div>             </td>           </tr>                </tbody>     </table>   </div> </body> </html> 

documentation/docs/optparse.html

@@ -0,0 +1,67 @@
+<!DOCTYPE html>  <html> <head>   <title>optparse.coffee</title>   <meta http-equiv="content-type" content="text/html; charset=UTF-8">   <link rel="stylesheet" media="all" href="docco.css" /> </head> <body>   <div id="container">     <div id="background"></div>            <div id="jump_to">         Jump To &hellip;         <div id="jump_wrapper">           <div id="jump_page">                                           <a class="source" href="cake.html">                 cake.coffee               </a>                                           <a class="source" href="coffee-script.html">                 coffee-script.coffee               </a>                                           <a class="source" href="command.html">                 command.coffee               </a>                                           <a class="source" href="grammar.html">                 grammar.coffee               </a>                                           <a class="source" href="lexer.html">                 lexer.coffee               </a>                                           <a class="source" href="nodes.html">                 nodes.coffee               </a>                                           <a class="source" href="optparse.html">                 optparse.coffee               </a>                                           <a class="source" href="repl.html">                 repl.coffee               </a>                                           <a class="source" href="rewriter.html">                 rewriter.coffee               </a>                                           <a class="source" href="scope.html">                 scope.coffee               </a>                        </div>         </div>       </div>          <table cellpadding="0" cellspacing="0">       <thead>         <tr>           <th class="docs">             <h1>               optparse.coffee             </h1>           </th>           <th class="code">           </th>         </tr>       </thead>       <tbody>                               <tr id="section-1">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-1">#</a>               </div>               <p>A simple <strong>OptionParser</strong> class to parse option flags from the command-line.
+Use it like so:</p>
+
+<pre><code>parser:  new OptionParser switches, help_banner
+options: parser.parse process.argv
+</code></pre>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">exports.OptionParser: </span><span class="nx">class</span> <span class="nx">OptionParser</span></pre></div>             </td>           </tr>                               <tr id="section-2">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-2">#</a>               </div>               <p>Initialize with a list of valid options, in the form:</p>
+
+<pre><code>[short-flag, long-flag, description]
+</code></pre>
+
+<p>Along with an an optional banner for the usage help.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">constructor: </span><span class="p">(</span><span class="nx">rules</span><span class="p">,</span> <span class="nx">banner</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nv">banner: </span> <span class="nx">banner</span>
+    <span class="err">@</span><span class="nv">rules: </span>  <span class="nx">build_rules</span><span class="p">(</span><span class="nx">rules</span><span class="p">)</span></pre></div>             </td>           </tr>                               <tr id="section-3">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-3">#</a>               </div>               <p>Parse the list of arguments, populating an <code>options</code> object with all of the
+specified options, and returning it. <code>options.arguments</code> will be an array
+containing the remaning non-option arguments. This is a simpler API than
+many option parsers that allow you to attach callback actions for every
+flag. Instead, you're responsible for interpreting the options object.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">parse: </span><span class="p">(</span><span class="nx">args</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="nv">options: </span><span class="p">{</span><span class="nv">arguments: </span><span class="p">[]}</span>
+    <span class="nv">args: </span><span class="nx">normalize_arguments</span> <span class="nx">args</span>
+    <span class="k">while</span> <span class="nv">arg: </span><span class="nx">args</span><span class="p">.</span><span class="nx">shift</span><span class="p">()</span>
+      <span class="nv">is_option: </span><span class="o">!!</span><span class="p">(</span><span class="nx">arg</span><span class="p">.</span><span class="nx">match</span><span class="p">(</span><span class="nx">LONG_FLAG</span><span class="p">)</span> <span class="o">or</span> <span class="nx">arg</span><span class="p">.</span><span class="nx">match</span><span class="p">(</span><span class="nx">SHORT_FLAG</span><span class="p">))</span>
+      <span class="nv">matched_rule: </span><span class="kc">no</span>
+      <span class="k">for</span> <span class="nx">rule</span> <span class="k">in</span> <span class="err">@</span><span class="nx">rules</span>
+        <span class="k">if</span> <span class="nx">rule</span><span class="p">.</span><span class="nx">short_flag</span> <span class="o">is</span> <span class="nx">arg</span> <span class="o">or</span> <span class="nx">rule</span><span class="p">.</span><span class="nx">long_flag</span> <span class="o">is</span> <span class="nx">arg</span>
+          <span class="nx">options</span><span class="p">[</span><span class="nx">rule</span><span class="p">.</span><span class="nx">name</span><span class="p">]</span><span class="o">:</span> <span class="k">if</span> <span class="nx">rule</span><span class="p">.</span><span class="nx">has_argument</span> <span class="k">then</span> <span class="nx">args</span><span class="p">.</span><span class="nx">shift</span><span class="p">()</span> <span class="k">else</span> <span class="kc">true</span>
+          <span class="nv">matched_rule: </span><span class="kc">yes</span>
+          <span class="k">break</span>
+      <span class="k">throw</span> <span class="k">new</span> <span class="nb">Error</span> <span class="s2">&quot;unrecognized option: $arg&quot;</span> <span class="k">if</span> <span class="nx">is_option</span> <span class="o">and</span> <span class="o">not</span> <span class="nx">matched_rule</span>
+      <span class="nx">options</span><span class="p">.</span><span class="nx">arguments</span><span class="p">.</span><span class="nx">push</span> <span class="nx">arg</span> <span class="nx">unless</span> <span class="nx">is_option</span>
+    <span class="nx">options</span></pre></div>             </td>           </tr>                               <tr id="section-4">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-4">#</a>               </div>               <p>Return the help text for this <strong>OptionParser</strong>, listing and describing all
+of the valid options, for <code>--help</code> and such.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">help: </span><span class="o">-&gt;</span>
+    <span class="nv">lines: </span><span class="p">[</span><span class="s1">&#39;Available options:&#39;</span><span class="p">]</span>
+    <span class="nx">lines</span><span class="p">.</span><span class="nx">unshift</span> <span class="s2">&quot;$@banner\n&quot;</span> <span class="k">if</span> <span class="err">@</span><span class="nx">banner</span>
+    <span class="k">for</span> <span class="nx">rule</span> <span class="k">in</span> <span class="err">@</span><span class="nx">rules</span>
+      <span class="nv">spaces: </span>  <span class="mi">15</span> <span class="o">-</span> <span class="nx">rule</span><span class="p">.</span><span class="nx">long_flag</span><span class="p">.</span><span class="nx">length</span>
+      <span class="nv">spaces: </span>  <span class="k">if</span> <span class="nx">spaces</span> <span class="o">&gt;</span> <span class="mi">0</span> <span class="k">then</span> <span class="p">(</span><span class="s1">&#39; &#39;</span> <span class="k">for</span> <span class="nx">i</span> <span class="k">in</span> <span class="p">[</span><span class="mi">0</span><span class="p">..</span><span class="nx">spaces</span><span class="p">]).</span><span class="nx">join</span><span class="p">(</span><span class="s1">&#39;&#39;</span><span class="p">)</span> <span class="k">else</span> <span class="s1">&#39;&#39;</span>
+      <span class="nv">let_part: </span><span class="k">if</span> <span class="nx">rule</span><span class="p">.</span><span class="nx">short_flag</span> <span class="k">then</span> <span class="nx">rule</span><span class="p">.</span><span class="nx">short_flag</span> <span class="o">+</span> <span class="s1">&#39;, &#39;</span> <span class="k">else</span> <span class="s1">&#39;    &#39;</span>
+      <span class="nx">lines</span><span class="p">.</span><span class="nx">push</span> <span class="s2">&quot;  $let_part${rule.long_flag}$spaces${rule.description}&quot;</span>
+    <span class="s2">&quot;\n${ lines.join(&#39;\n&#39;) }\n&quot;</span></pre></div>             </td>           </tr>                               <tr id="section-5">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-5">#</a>               </div>               <h2>Helpers</h2>             </td>             <td class="code">               <div class="highlight"><pre></pre></div>             </td>           </tr>                               <tr id="section-6">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-6">#</a>               </div>               <p>Regex matchers for option flags.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">LONG_FLAG: </span> <span class="sr">/^(--\w[\w\-]+)/</span>
+<span class="nv">SHORT_FLAG: </span><span class="sr">/^(-\w)/</span>
+<span class="nv">MULTI_FLAG: </span><span class="sr">/^-(\w{2,})/</span>
+<span class="nv">OPTIONAL: </span>  <span class="sr">/\[(.+)\]/</span></pre></div>             </td>           </tr>                               <tr id="section-7">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-7">#</a>               </div>               <p>Build and return the list of option rules. If the optional <em>short-flag</em> is
+unspecified, leave it out by padding with <code>null</code>.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">build_rules: </span><span class="p">(</span><span class="nx">rules</span><span class="p">)</span> <span class="o">-&gt;</span>
+  <span class="k">for</span> <span class="nx">tuple</span> <span class="k">in</span> <span class="nx">rules</span>
+    <span class="nx">tuple</span><span class="p">.</span><span class="nx">unshift</span> <span class="kc">null</span> <span class="k">if</span> <span class="nx">tuple</span><span class="p">.</span><span class="nx">length</span> <span class="o">&lt;</span> <span class="mi">3</span>
+    <span class="nx">build_rule</span> <span class="nx">tuple</span><span class="p">...</span></pre></div>             </td>           </tr>                               <tr id="section-8">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-8">#</a>               </div>               <p>Build a rule from a <code>-o</code> short flag, a <code>--output [DIR]</code> long flag, and the
+description of what the option does.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">build_rule: </span><span class="p">(</span><span class="nx">short_flag</span><span class="p">,</span> <span class="nx">long_flag</span><span class="p">,</span> <span class="nx">description</span><span class="p">)</span> <span class="o">-&gt;</span>
+  <span class="nv">match: </span>     <span class="nx">long_flag</span><span class="p">.</span><span class="nx">match</span><span class="p">(</span><span class="nx">OPTIONAL</span><span class="p">)</span>
+  <span class="nv">long_flag: </span> <span class="nx">long_flag</span><span class="p">.</span><span class="nx">match</span><span class="p">(</span><span class="nx">LONG_FLAG</span><span class="p">)[</span><span class="mi">1</span><span class="p">]</span>
+  <span class="p">{</span>
+    <span class="nv">name: </span>        <span class="nx">long_flag</span><span class="p">.</span><span class="nx">substr</span> <span class="mi">2</span>
+    <span class="nv">short_flag: </span>  <span class="nx">short_flag</span>
+    <span class="nv">long_flag: </span>   <span class="nx">long_flag</span>
+    <span class="nv">description: </span> <span class="nx">description</span>
+    <span class="nv">has_argument: </span><span class="o">!!</span><span class="p">(</span><span class="nx">match</span> <span class="o">and</span> <span class="nx">match</span><span class="p">[</span><span class="mi">1</span><span class="p">])</span>
+  <span class="p">}</span></pre></div>             </td>           </tr>                               <tr id="section-9">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-9">#</a>               </div>               <p>Normalize arguments by expanding merged flags into multiple flags. This allows
+you to have <code>-wl</code> be the same as <code>--watch --lint</code>.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">normalize_arguments: </span><span class="p">(</span><span class="nx">args</span><span class="p">)</span> <span class="o">-&gt;</span>
+  <span class="nv">args: </span><span class="nx">args</span><span class="p">.</span><span class="nx">slice</span> <span class="mi">0</span>
+  <span class="nv">result: </span><span class="p">[]</span>
+  <span class="k">for</span> <span class="nx">arg</span> <span class="k">in</span> <span class="nx">args</span>
+    <span class="k">if</span> <span class="nv">match: </span><span class="nx">arg</span><span class="p">.</span><span class="nx">match</span> <span class="nx">MULTI_FLAG</span>
+      <span class="nx">result</span><span class="p">.</span><span class="nx">push</span> <span class="s1">&#39;-&#39;</span> <span class="o">+</span> <span class="nx">l</span> <span class="k">for</span> <span class="nx">l</span> <span class="k">in</span> <span class="nx">match</span><span class="p">[</span><span class="mi">1</span><span class="p">].</span><span class="nx">split</span> <span class="s1">&#39;&#39;</span>
+    <span class="k">else</span>
+      <span class="nx">result</span><span class="p">.</span><span class="nx">push</span> <span class="nx">arg</span>
+  <span class="nx">result</span>
+
+</pre></div>             </td>           </tr>                </tbody>     </table>   </div> </body> </html> 

documentation/docs/repl.html

@@ -0,0 +1,20 @@
+<!DOCTYPE html>  <html> <head>   <title>repl.coffee</title>   <meta http-equiv="content-type" content="text/html; charset=UTF-8">   <link rel="stylesheet" media="all" href="docco.css" /> </head> <body>   <div id="container">     <div id="background"></div>            <div id="jump_to">         Jump To &hellip;         <div id="jump_wrapper">           <div id="jump_page">                                           <a class="source" href="cake.html">                 cake.coffee               </a>                                           <a class="source" href="coffee-script.html">                 coffee-script.coffee               </a>                                           <a class="source" href="command.html">                 command.coffee               </a>                                           <a class="source" href="grammar.html">                 grammar.coffee               </a>                                           <a class="source" href="lexer.html">                 lexer.coffee               </a>                                           <a class="source" href="nodes.html">                 nodes.coffee               </a>                                           <a class="source" href="optparse.html">                 optparse.coffee               </a>                                           <a class="source" href="repl.html">                 repl.coffee               </a>                                           <a class="source" href="rewriter.html">                 rewriter.coffee               </a>                                           <a class="source" href="scope.html">                 scope.coffee               </a>                        </div>         </div>       </div>          <table cellpadding="0" cellspacing="0">       <thead>         <tr>           <th class="docs">             <h1>               repl.coffee             </h1>           </th>           <th class="code">           </th>         </tr>       </thead>       <tbody>                               <tr id="section-1">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-1">#</a>               </div>               <p>A very simple Read-Eval-Print-Loop. Compiles one line at a time to JavaScript
+and evaluates it. Good for simple tests, or poking around the <strong>Node.js</strong> API.
+Using it looks like this:</p>
+
+<pre><code>coffee&gt; puts "$num bottles of beer" for num in [99..1]
+</code></pre>             </td>             <td class="code">               <div class="highlight"><pre></pre></div>             </td>           </tr>                               <tr id="section-2">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-2">#</a>               </div>               <p>Require the <strong>coffee-script</strong> module to get access to the compiler.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">CoffeeScript: </span><span class="nx">require</span> <span class="s1">&#39;coffee-script&#39;</span></pre></div>             </td>           </tr>                               <tr id="section-3">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-3">#</a>               </div>               <p>Our prompt.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">prompt: </span><span class="s1">&#39;coffee&gt; &#39;</span></pre></div>             </td>           </tr>                               <tr id="section-4">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-4">#</a>               </div>               <p>Quick alias for quitting the REPL.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nx">process</span><span class="p">.</span><span class="nx">mixin</span> <span class="p">{</span>
+  <span class="nv">quit: </span><span class="o">-&gt;</span> <span class="nx">process</span><span class="p">.</span><span class="nx">exit</span><span class="p">(</span><span class="mi">0</span><span class="p">)</span>
+<span class="p">}</span></pre></div>             </td>           </tr>                               <tr id="section-5">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-5">#</a>               </div>               <p>The main REPL function. <strong>run</strong> is called every time a line of code is entered.
+Attempt to evaluate the command. If there's an exception, print it out instead
+of exiting.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">run: </span><span class="p">(</span><span class="nx">code</span><span class="p">)</span> <span class="o">-&gt;</span>
+  <span class="k">try</span>
+    <span class="nv">val: </span><span class="nx">CoffeeScript</span><span class="p">.</span><span class="nx">run</span> <span class="nx">code</span><span class="p">,</span> <span class="p">{</span><span class="nv">no_wrap: </span><span class="kc">true</span><span class="p">,</span> <span class="nv">globals: </span><span class="kc">true</span><span class="p">,</span> <span class="nv">source: </span><span class="s1">&#39;repl&#39;</span><span class="p">}</span>
+    <span class="nx">p</span> <span class="nx">val</span> <span class="k">if</span> <span class="nx">val</span> <span class="o">isnt</span> <span class="kc">undefined</span>
+  <span class="k">catch</span> <span class="nx">err</span>
+    <span class="nx">puts</span> <span class="nx">err</span><span class="p">.</span><span class="nx">stack</span> <span class="o">or</span> <span class="nx">err</span><span class="p">.</span><span class="nx">toString</span><span class="p">()</span>
+  <span class="nx">print</span> <span class="nx">prompt</span></pre></div>             </td>           </tr>                               <tr id="section-6">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-6">#</a>               </div>               <p>Start up the REPL by opening <strong>stdio</strong> and listening for input.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nx">process</span><span class="p">.</span><span class="nx">stdio</span><span class="p">.</span><span class="nx">addListener</span> <span class="s1">&#39;data&#39;</span><span class="p">,</span> <span class="nx">run</span>
+<span class="nx">process</span><span class="p">.</span><span class="nx">stdio</span><span class="p">.</span><span class="nx">open</span><span class="p">()</span>
+<span class="nx">print</span> <span class="nx">prompt</span>
+
+</pre></div>             </td>           </tr>                </tbody>     </table>   </div> </body> </html> 

documentation/docs/rewriter.html

@@ -0,0 +1,191 @@
+<!DOCTYPE html>  <html> <head>   <title>rewriter.coffee</title>   <meta http-equiv="content-type" content="text/html; charset=UTF-8">   <link rel="stylesheet" media="all" href="docco.css" /> </head> <body>   <div id="container">     <div id="background"></div>            <div id="jump_to">         Jump To &hellip;         <div id="jump_wrapper">           <div id="jump_page">                                           <a class="source" href="cake.html">                 cake.coffee               </a>                                           <a class="source" href="coffee-script.html">                 coffee-script.coffee               </a>                                           <a class="source" href="command.html">                 command.coffee               </a>                                           <a class="source" href="grammar.html">                 grammar.coffee               </a>                                           <a class="source" href="lexer.html">                 lexer.coffee               </a>                                           <a class="source" href="nodes.html">                 nodes.coffee               </a>                                           <a class="source" href="optparse.html">                 optparse.coffee               </a>                                           <a class="source" href="repl.html">                 repl.coffee               </a>                                           <a class="source" href="rewriter.html">                 rewriter.coffee               </a>                                           <a class="source" href="scope.html">                 scope.coffee               </a>                        </div>         </div>       </div>          <table cellpadding="0" cellspacing="0">       <thead>         <tr>           <th class="docs">             <h1>               rewriter.coffee             </h1>           </th>           <th class="code">           </th>         </tr>       </thead>       <tbody>                               <tr id="section-1">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-1">#</a>               </div>               <p>The CoffeeScript language has a decent amount of optional syntax,
+implicit syntax, and shorthand syntax. These things can greatly complicate a
+grammar and bloat the resulting parse table. Instead of making the parser
+handle it all, we take a series of passes over the token stream,
+using this <strong>Rewriter</strong> to convert shorthand into the unambiguous long form,
+add implicit indentation and parentheses, balance incorrect nestings, and
+generally clean things up.</p>             </td>             <td class="code">               <div class="highlight"><pre></pre></div>             </td>           </tr>                               <tr id="section-2">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-2">#</a>               </div>               <p>Set up exported variables for both Node.js and the browser.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="k">this</span><span class="p">.</span><span class="nv">exports: </span><span class="k">this</span> <span class="nx">unless</span> <span class="nx">process</span><span class="o">?</span></pre></div>             </td>           </tr>                               <tr id="section-3">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-3">#</a>               </div>               <p>The <strong>Rewriter</strong> class is used by the <a href="lexer.html">Lexer</a>, directly against
+its internal array of tokens.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">exports.Rewriter: </span><span class="nx">class</span> <span class="nx">Rewriter</span></pre></div>             </td>           </tr>                               <tr id="section-4">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-4">#</a>               </div>               <p>Rewrite the token stream in multiple passes, one logical filter at
+a time. This could certainly be changed into a single pass through the
+stream, with a big ol' efficient switch, but it's much nicer to work with
+like this. The order of these passes matters -- indentation must be
+corrected before implicit parentheses can be wrapped around blocks of code.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">rewrite: </span><span class="p">(</span><span class="nx">tokens</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nv">tokens: </span><span class="nx">tokens</span>
+    <span class="err">@</span><span class="nx">adjust_comments</span><span class="p">()</span>
+    <span class="err">@</span><span class="nx">remove_leading_newlines</span><span class="p">()</span>
+    <span class="err">@</span><span class="nx">remove_mid_expression_newlines</span><span class="p">()</span>
+    <span class="err">@</span><span class="nx">close_open_calls_and_indexes</span><span class="p">()</span>
+    <span class="err">@</span><span class="nx">add_implicit_indentation</span><span class="p">()</span>
+    <span class="err">@</span><span class="nx">add_implicit_parentheses</span><span class="p">()</span>
+    <span class="err">@</span><span class="nx">ensure_balance</span><span class="p">(</span><span class="nx">BALANCED_PAIRS</span><span class="p">)</span>
+    <span class="err">@</span><span class="nx">rewrite_closing_parens</span><span class="p">()</span>
+    <span class="err">@</span><span class="nx">tokens</span></pre></div>             </td>           </tr>                               <tr id="section-5">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-5">#</a>               </div>               <p>Rewrite the token stream, looking one token ahead and behind.
+Allow the return value of the block to tell us how many tokens to move
+forwards (or backwards) in the stream, to make sure we don't miss anything
+as tokens are inserted and removed, and the stream changes length under
+our feet.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">scan_tokens: </span><span class="p">(</span><span class="nx">block</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="nv">i: </span><span class="mi">0</span>
+    <span class="k">while</span> <span class="kc">true</span>
+      <span class="k">break</span> <span class="nx">unless</span> <span class="err">@</span><span class="nx">tokens</span><span class="p">[</span><span class="nx">i</span><span class="p">]</span>
+      <span class="nv">move: </span><span class="nx">block</span><span class="p">(</span><span class="err">@</span><span class="nx">tokens</span><span class="p">[</span><span class="nx">i</span> <span class="o">-</span> <span class="mi">1</span><span class="p">],</span> <span class="err">@</span><span class="nx">tokens</span><span class="p">[</span><span class="nx">i</span><span class="p">],</span> <span class="err">@</span><span class="nx">tokens</span><span class="p">[</span><span class="nx">i</span> <span class="o">+</span> <span class="mi">1</span><span class="p">],</span> <span class="nx">i</span><span class="p">)</span>
+      <span class="nx">i</span> <span class="o">+=</span> <span class="nx">move</span>
+    <span class="kc">true</span></pre></div>             </td>           </tr>                               <tr id="section-6">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-6">#</a>               </div>               <p>Massage newlines and indentations so that comments don't have to be
+correctly indented, or appear on a line of their own.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">adjust_comments: </span><span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nx">scan_tokens</span> <span class="p">(</span><span class="nx">prev</span><span class="p">,</span> <span class="nx">token</span><span class="p">,</span> <span class="nx">post</span><span class="p">,</span> <span class="nx">i</span><span class="p">)</span> <span class="o">=&gt;</span>
+      <span class="k">return</span> <span class="mi">1</span> <span class="nx">unless</span> <span class="nx">token</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">is</span> <span class="s1">&#39;COMMENT&#39;</span>
+      <span class="nv">after: </span> <span class="err">@</span><span class="nx">tokens</span><span class="p">[</span><span class="nx">i</span> <span class="o">+</span> <span class="mi">2</span><span class="p">]</span>
+      <span class="k">if</span> <span class="nx">after</span> <span class="o">and</span> <span class="nx">after</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">is</span> <span class="s1">&#39;INDENT&#39;</span>
+        <span class="err">@</span><span class="nx">tokens</span><span class="p">.</span><span class="nx">splice</span><span class="p">(</span><span class="nx">i</span> <span class="o">+</span> <span class="mi">2</span><span class="p">,</span> <span class="mi">1</span><span class="p">)</span>
+        <span class="err">@</span><span class="nx">tokens</span><span class="p">.</span><span class="nx">splice</span><span class="p">(</span><span class="nx">i</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="nx">after</span><span class="p">)</span>
+        <span class="k">return</span> <span class="mi">1</span>
+      <span class="k">else</span> <span class="k">if</span> <span class="nx">prev</span> <span class="o">and</span> <span class="nx">prev</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">isnt</span> <span class="s1">&#39;TERMINATOR&#39;</span> <span class="o">and</span> <span class="nx">prev</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">isnt</span> <span class="s1">&#39;INDENT&#39;</span> <span class="o">and</span> <span class="nx">prev</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">isnt</span> <span class="s1">&#39;OUTDENT&#39;</span>
+        <span class="err">@</span><span class="nx">tokens</span><span class="p">.</span><span class="nx">splice</span><span class="p">(</span><span class="nx">i</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="p">[</span><span class="s1">&#39;TERMINATOR&#39;</span><span class="p">,</span> <span class="s2">&quot;\n&quot;</span><span class="p">,</span> <span class="nx">prev</span><span class="p">[</span><span class="mi">2</span><span class="p">]])</span>
+        <span class="k">return</span> <span class="mi">2</span>
+      <span class="k">else</span>
+        <span class="k">return</span> <span class="mi">1</span></pre></div>             </td>           </tr>                               <tr id="section-7">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-7">#</a>               </div>               <p>Leading newlines would introduce an ambiguity in the grammar, so we
+dispatch them here.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">remove_leading_newlines: </span><span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nx">tokens</span><span class="p">.</span><span class="nx">shift</span><span class="p">()</span> <span class="k">while</span> <span class="err">@</span><span class="nx">tokens</span><span class="p">[</span><span class="mi">0</span><span class="p">][</span><span class="mi">0</span><span class="p">]</span> <span class="o">is</span> <span class="s1">&#39;TERMINATOR&#39;</span></pre></div>             </td>           </tr>                               <tr id="section-8">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-8">#</a>               </div>               <p>Some blocks occur in the middle of expressions -- when we're expecting
+this, remove their trailing newlines.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">remove_mid_expression_newlines: </span><span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nx">scan_tokens</span> <span class="p">(</span><span class="nx">prev</span><span class="p">,</span> <span class="nx">token</span><span class="p">,</span> <span class="nx">post</span><span class="p">,</span> <span class="nx">i</span><span class="p">)</span> <span class="o">=&gt;</span>
+      <span class="k">return</span> <span class="mi">1</span> <span class="nx">unless</span> <span class="nx">post</span> <span class="o">and</span> <span class="nx">include</span><span class="p">(</span><span class="nx">EXPRESSION_CLOSE</span><span class="p">,</span> <span class="nx">post</span><span class="p">[</span><span class="mi">0</span><span class="p">])</span> <span class="o">and</span> <span class="nx">token</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">is</span> <span class="s1">&#39;TERMINATOR&#39;</span>
+      <span class="err">@</span><span class="nx">tokens</span><span class="p">.</span><span class="nx">splice</span><span class="p">(</span><span class="nx">i</span><span class="p">,</span> <span class="mi">1</span><span class="p">)</span>
+      <span class="k">return</span> <span class="mi">0</span></pre></div>             </td>           </tr>                               <tr id="section-9">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-9">#</a>               </div>               <p>The lexer has tagged the opening parenthesis of a method call, and the
+opening bracket of an indexing operation. Match them with their paired
+close.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">close_open_calls_and_indexes: </span><span class="o">-&gt;</span>
+    <span class="nv">parens: </span>  <span class="p">[</span><span class="mi">0</span><span class="p">]</span>
+    <span class="nv">brackets: </span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
+    <span class="err">@</span><span class="nx">scan_tokens</span> <span class="p">(</span><span class="nx">prev</span><span class="p">,</span> <span class="nx">token</span><span class="p">,</span> <span class="nx">post</span><span class="p">,</span> <span class="nx">i</span><span class="p">)</span> <span class="o">=&gt;</span>
+      <span class="k">switch</span> <span class="nx">token</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
+        <span class="k">when</span> <span class="s1">&#39;CALL_START&#39;</span>  <span class="k">then</span> <span class="nx">parens</span><span class="p">.</span><span class="nx">push</span><span class="p">(</span><span class="mi">0</span><span class="p">)</span>
+        <span class="k">when</span> <span class="s1">&#39;INDEX_START&#39;</span> <span class="k">then</span> <span class="nx">brackets</span><span class="p">.</span><span class="nx">push</span><span class="p">(</span><span class="mi">0</span><span class="p">)</span>
+        <span class="k">when</span> <span class="s1">&#39;(&#39;</span>           <span class="k">then</span> <span class="nx">parens</span><span class="p">[</span><span class="nx">parens</span><span class="p">.</span><span class="nx">length</span> <span class="o">-</span> <span class="mi">1</span><span class="p">]</span> <span class="o">+=</span> <span class="mi">1</span>
+        <span class="k">when</span> <span class="s1">&#39;[&#39;</span>           <span class="k">then</span> <span class="nx">brackets</span><span class="p">[</span><span class="nx">brackets</span><span class="p">.</span><span class="nx">length</span> <span class="o">-</span> <span class="mi">1</span><span class="p">]</span> <span class="o">+=</span> <span class="mi">1</span>
+        <span class="k">when</span> <span class="s1">&#39;)&#39;</span>
+          <span class="k">if</span> <span class="nx">parens</span><span class="p">[</span><span class="nx">parens</span><span class="p">.</span><span class="nx">length</span> <span class="o">-</span> <span class="mi">1</span><span class="p">]</span> <span class="o">is</span> <span class="mi">0</span>
+            <span class="nx">parens</span><span class="p">.</span><span class="nx">pop</span><span class="p">()</span>
+            <span class="nx">token</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="o">:</span> <span class="s1">&#39;CALL_END&#39;</span>
+          <span class="k">else</span>
+            <span class="nx">parens</span><span class="p">[</span><span class="nx">parens</span><span class="p">.</span><span class="nx">length</span> <span class="o">-</span> <span class="mi">1</span><span class="p">]</span> <span class="o">-=</span> <span class="mi">1</span>
+        <span class="k">when</span> <span class="s1">&#39;]&#39;</span>
+          <span class="k">if</span> <span class="nx">brackets</span><span class="p">[</span><span class="nx">brackets</span><span class="p">.</span><span class="nx">length</span> <span class="o">-</span> <span class="mi">1</span><span class="p">]</span> <span class="o">==</span> <span class="mi">0</span>
+            <span class="nx">brackets</span><span class="p">.</span><span class="nx">pop</span><span class="p">()</span>
+            <span class="nx">token</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="o">:</span> <span class="s1">&#39;INDEX_END&#39;</span>
+          <span class="k">else</span>
+            <span class="nx">brackets</span><span class="p">[</span><span class="nx">brackets</span><span class="p">.</span><span class="nx">length</span> <span class="o">-</span> <span class="mi">1</span><span class="p">]</span> <span class="o">-=</span> <span class="mi">1</span>
+      <span class="k">return</span> <span class="mi">1</span></pre></div>             </td>           </tr>                               <tr id="section-10">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-10">#</a>               </div>               <p>Methods may be optionally called without parentheses, for simple cases.
+Insert the implicit parentheses here, so that the parser doesn't have to
+deal with them.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">add_implicit_parentheses: </span><span class="o">-&gt;</span>
+    <span class="nv">stack: </span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
+    <span class="err">@</span><span class="nx">scan_tokens</span> <span class="p">(</span><span class="nx">prev</span><span class="p">,</span> <span class="nx">token</span><span class="p">,</span> <span class="nx">post</span><span class="p">,</span> <span class="nx">i</span><span class="p">)</span> <span class="o">=&gt;</span>
+      <span class="nv">tag: </span><span class="nx">token</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
+      <span class="nx">stack</span><span class="p">.</span><span class="nx">push</span><span class="p">(</span><span class="mi">0</span><span class="p">)</span> <span class="k">if</span> <span class="nx">tag</span> <span class="o">is</span> <span class="s1">&#39;INDENT&#39;</span>
+      <span class="k">if</span> <span class="nx">tag</span> <span class="o">is</span> <span class="s1">&#39;OUTDENT&#39;</span>
+        <span class="nv">last: </span><span class="nx">stack</span><span class="p">.</span><span class="nx">pop</span><span class="p">()</span>
+        <span class="nx">stack</span><span class="p">[</span><span class="nx">stack</span><span class="p">.</span><span class="nx">length</span> <span class="o">-</span> <span class="mi">1</span><span class="p">]</span> <span class="o">+=</span> <span class="nx">last</span>
+      <span class="k">if</span> <span class="o">!</span><span class="nx">post</span><span class="o">?</span> <span class="o">or</span> <span class="nx">include</span> <span class="nx">IMPLICIT_END</span><span class="p">,</span> <span class="nx">tag</span>
+        <span class="k">return</span> <span class="mi">1</span> <span class="k">if</span> <span class="nx">tag</span> <span class="o">is</span> <span class="s1">&#39;INDENT&#39;</span> <span class="o">and</span> <span class="nx">prev</span> <span class="o">and</span> <span class="nx">include</span> <span class="nx">IMPLICIT_BLOCK</span><span class="p">,</span> <span class="nx">prev</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
+        <span class="k">if</span> <span class="nx">stack</span><span class="p">[</span><span class="nx">stack</span><span class="p">.</span><span class="nx">length</span> <span class="o">-</span> <span class="mi">1</span><span class="p">]</span> <span class="o">&gt;</span> <span class="mi">0</span> <span class="o">or</span> <span class="nx">tag</span> <span class="o">is</span> <span class="s1">&#39;INDENT&#39;</span>
+          <span class="nv">idx: </span><span class="k">if</span> <span class="nx">tag</span> <span class="o">is</span> <span class="s1">&#39;OUTDENT&#39;</span> <span class="k">then</span> <span class="nx">i</span> <span class="o">+</span> <span class="mi">1</span> <span class="k">else</span> <span class="nx">i</span>
+          <span class="nv">stack_pointer: </span><span class="k">if</span> <span class="nx">tag</span> <span class="o">is</span> <span class="s1">&#39;INDENT&#39;</span> <span class="k">then</span> <span class="mi">2</span> <span class="k">else</span> <span class="mi">1</span>
+          <span class="k">for</span> <span class="nx">tmp</span> <span class="k">in</span> <span class="p">[</span><span class="mi">0</span><span class="p">...</span><span class="nx">stack</span><span class="p">[</span><span class="nx">stack</span><span class="p">.</span><span class="nx">length</span> <span class="o">-</span> <span class="nx">stack_pointer</span><span class="p">]]</span>
+            <span class="err">@</span><span class="nx">tokens</span><span class="p">.</span><span class="nx">splice</span><span class="p">(</span><span class="nx">idx</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="p">[</span><span class="s1">&#39;CALL_END&#39;</span><span class="p">,</span> <span class="s1">&#39;)&#39;</span><span class="p">,</span> <span class="nx">token</span><span class="p">[</span><span class="mi">2</span><span class="p">]])</span>
+          <span class="nv">size: </span><span class="nx">stack</span><span class="p">[</span><span class="nx">stack</span><span class="p">.</span><span class="nx">length</span> <span class="o">-</span> <span class="nx">stack_pointer</span><span class="p">]</span> <span class="o">+</span> <span class="mi">1</span>
+          <span class="nx">stack</span><span class="p">[</span><span class="nx">stack</span><span class="p">.</span><span class="nx">length</span> <span class="o">-</span> <span class="nx">stack_pointer</span><span class="p">]</span><span class="o">:</span> <span class="mi">0</span>
+          <span class="k">return</span> <span class="nx">size</span>
+      <span class="k">return</span> <span class="mi">1</span> <span class="nx">unless</span> <span class="nx">prev</span> <span class="o">and</span> <span class="nx">include</span><span class="p">(</span><span class="nx">IMPLICIT_FUNC</span><span class="p">,</span> <span class="nx">prev</span><span class="p">[</span><span class="mi">0</span><span class="p">])</span> <span class="o">and</span> <span class="nx">include</span> <span class="nx">IMPLICIT_CALL</span><span class="p">,</span> <span class="nx">tag</span>
+      <span class="err">@</span><span class="nx">tokens</span><span class="p">.</span><span class="nx">splice</span><span class="p">(</span><span class="nx">i</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="p">[</span><span class="s1">&#39;CALL_START&#39;</span><span class="p">,</span> <span class="s1">&#39;(&#39;</span><span class="p">,</span> <span class="nx">token</span><span class="p">[</span><span class="mi">2</span><span class="p">]])</span>
+      <span class="nx">stack</span><span class="p">[</span><span class="nx">stack</span><span class="p">.</span><span class="nx">length</span> <span class="o">-</span> <span class="mi">1</span><span class="p">]</span> <span class="o">+=</span> <span class="mi">1</span>
+      <span class="k">return</span> <span class="mi">2</span></pre></div>             </td>           </tr>                               <tr id="section-11">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-11">#</a>               </div>               <p>Because our grammar is LALR(1), it can't handle some single-line
+expressions that lack ending delimiters. The <strong>Rewriter</strong> adds the implicit
+blocks, so it doesn't need to. ')' can close a single-line block,
+but we need to make sure it's balanced.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">add_implicit_indentation: </span><span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nx">scan_tokens</span> <span class="p">(</span><span class="nx">prev</span><span class="p">,</span> <span class="nx">token</span><span class="p">,</span> <span class="nx">post</span><span class="p">,</span> <span class="nx">i</span><span class="p">)</span> <span class="o">=&gt;</span>
+      <span class="k">return</span> <span class="mi">1</span> <span class="nx">unless</span> <span class="nx">include</span><span class="p">(</span><span class="nx">SINGLE_LINERS</span><span class="p">,</span> <span class="nx">token</span><span class="p">[</span><span class="mi">0</span><span class="p">])</span> <span class="o">and</span>
+        <span class="nx">post</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">isnt</span> <span class="s1">&#39;INDENT&#39;</span> <span class="o">and</span>
+        <span class="o">not</span> <span class="p">(</span><span class="nx">token</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">is</span> <span class="s1">&#39;ELSE&#39;</span> <span class="o">and</span> <span class="nx">post</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">is</span> <span class="s1">&#39;IF&#39;</span><span class="p">)</span>
+      <span class="nv">starter: </span><span class="nx">token</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
+      <span class="err">@</span><span class="nx">tokens</span><span class="p">.</span><span class="nx">splice</span><span class="p">(</span><span class="nx">i</span> <span class="o">+</span> <span class="mi">1</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="p">[</span><span class="s1">&#39;INDENT&#39;</span><span class="p">,</span> <span class="mi">2</span><span class="p">,</span> <span class="nx">token</span><span class="p">[</span><span class="mi">2</span><span class="p">]])</span>
+      <span class="nv">idx: </span><span class="nx">i</span> <span class="o">+</span> <span class="mi">1</span>
+      <span class="nv">parens: </span><span class="mi">0</span>
+      <span class="k">while</span> <span class="kc">true</span>
+        <span class="nx">idx</span> <span class="o">+=</span> <span class="mi">1</span>
+        <span class="nv">tok: </span><span class="err">@</span><span class="nx">tokens</span><span class="p">[</span><span class="nx">idx</span><span class="p">]</span>
+        <span class="nv">pre: </span><span class="err">@</span><span class="nx">tokens</span><span class="p">[</span><span class="nx">idx</span> <span class="o">-</span> <span class="mi">1</span><span class="p">]</span>
+        <span class="k">if</span> <span class="p">(</span><span class="o">not</span> <span class="nx">tok</span> <span class="o">or</span>
+            <span class="p">(</span><span class="nx">include</span><span class="p">(</span><span class="nx">SINGLE_CLOSERS</span><span class="p">,</span> <span class="nx">tok</span><span class="p">[</span><span class="mi">0</span><span class="p">])</span> <span class="o">and</span> <span class="nx">tok</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span> <span class="o">isnt</span> <span class="s1">&#39;;&#39;</span><span class="p">)</span> <span class="o">or</span>
+            <span class="p">(</span><span class="nx">tok</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">is</span> <span class="s1">&#39;)&#39;</span> <span class="o">&amp;&amp;</span> <span class="nx">parens</span> <span class="o">is</span> <span class="mi">0</span><span class="p">))</span> <span class="o">and</span>
+            <span class="o">not</span> <span class="p">(</span><span class="nx">starter</span> <span class="o">is</span> <span class="s1">&#39;ELSE&#39;</span> <span class="o">and</span> <span class="nx">tok</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">is</span> <span class="s1">&#39;ELSE&#39;</span><span class="p">)</span>
+          <span class="nv">insertion: </span><span class="k">if</span> <span class="nx">pre</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">is</span> <span class="s2">&quot;,&quot;</span> <span class="k">then</span> <span class="nx">idx</span> <span class="o">-</span> <span class="mi">1</span> <span class="k">else</span> <span class="nx">idx</span>
+          <span class="err">@</span><span class="nx">tokens</span><span class="p">.</span><span class="nx">splice</span><span class="p">(</span><span class="nx">insertion</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="p">[</span><span class="s1">&#39;OUTDENT&#39;</span><span class="p">,</span> <span class="mi">2</span><span class="p">,</span> <span class="nx">token</span><span class="p">[</span><span class="mi">2</span><span class="p">]])</span>
+          <span class="k">break</span>
+        <span class="nx">parens</span> <span class="o">+=</span> <span class="mi">1</span> <span class="k">if</span> <span class="nx">tok</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">is</span> <span class="s1">&#39;(&#39;</span>
+        <span class="nx">parens</span> <span class="o">-=</span> <span class="mi">1</span> <span class="k">if</span> <span class="nx">tok</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">is</span> <span class="s1">&#39;)&#39;</span>
+      <span class="k">return</span> <span class="mi">1</span> <span class="nx">unless</span> <span class="nx">token</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">is</span> <span class="s1">&#39;THEN&#39;</span>
+      <span class="err">@</span><span class="nx">tokens</span><span class="p">.</span><span class="nx">splice</span><span class="p">(</span><span class="nx">i</span><span class="p">,</span> <span class="mi">1</span><span class="p">)</span>
+      <span class="k">return</span> <span class="mi">0</span></pre></div>             </td>           </tr>                               <tr id="section-12">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-12">#</a>               </div>               <p>Ensure that all listed pairs of tokens are correctly balanced throughout
+the course of the token stream.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">ensure_balance: </span><span class="p">(</span><span class="nx">pairs</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="nv">levels: </span><span class="p">{}</span>
+    <span class="err">@</span><span class="nx">scan_tokens</span> <span class="p">(</span><span class="nx">prev</span><span class="p">,</span> <span class="nx">token</span><span class="p">,</span> <span class="nx">post</span><span class="p">,</span> <span class="nx">i</span><span class="p">)</span> <span class="o">=&gt;</span>
+      <span class="k">for</span> <span class="nx">pair</span> <span class="k">in</span> <span class="nx">pairs</span>
+        <span class="p">[</span><span class="nx">open</span><span class="p">,</span> <span class="nx">close</span><span class="p">]</span><span class="o">:</span> <span class="nx">pair</span>
+        <span class="nx">levels</span><span class="p">[</span><span class="nx">open</span><span class="p">]</span> <span class="o">||=</span> <span class="mi">0</span>
+        <span class="nx">levels</span><span class="p">[</span><span class="nx">open</span><span class="p">]</span> <span class="o">+=</span> <span class="mi">1</span> <span class="k">if</span> <span class="nx">token</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">is</span> <span class="nx">open</span>
+        <span class="nx">levels</span><span class="p">[</span><span class="nx">open</span><span class="p">]</span> <span class="o">-=</span> <span class="mi">1</span> <span class="k">if</span> <span class="nx">token</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">is</span> <span class="nx">close</span>
+        <span class="k">throw</span> <span class="k">new</span> <span class="nb">Error</span><span class="p">(</span><span class="s2">&quot;too many ${token[1]} on line ${token[2] + 1}&quot;</span><span class="p">)</span> <span class="k">if</span> <span class="nx">levels</span><span class="p">[</span><span class="nx">open</span><span class="p">]</span> <span class="o">&lt;</span> <span class="mi">0</span>
+      <span class="k">return</span> <span class="mi">1</span>
+    <span class="nv">unclosed: </span><span class="nx">key</span> <span class="k">for</span> <span class="nx">key</span><span class="p">,</span> <span class="nx">value</span> <span class="k">of</span> <span class="nx">levels</span> <span class="k">when</span> <span class="nx">value</span> <span class="o">&gt;</span> <span class="mi">0</span>
+    <span class="k">throw</span> <span class="k">new</span> <span class="nb">Error</span><span class="p">(</span><span class="s2">&quot;unclosed ${unclosed[0]}&quot;</span><span class="p">)</span> <span class="k">if</span> <span class="nx">unclosed</span><span class="p">.</span><span class="nx">length</span></pre></div>             </td>           </tr>                               <tr id="section-13">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-13">#</a>               </div>               <p>We'd like to support syntax like this:</p>
+
+<pre><code>el.click((event) -&gt;
+  el.hide())
+</code></pre>
+
+<p>In order to accomplish this, move outdents that follow closing parens
+inwards, safely. The steps to accomplish this are:</p>
+
+<ol>
+<li>Check that all paired tokens are balanced and in order.</li>
+<li>Rewrite the stream with a stack: if you see an '(' or INDENT, add it
+to the stack. If you see an ')' or OUTDENT, pop the stack and replace
+it with the inverse of what we've just popped.</li>
+<li>Keep track of "debt" for tokens that we fake, to make sure we end
+up balanced in the end.</li>
+</ol>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">rewrite_closing_parens: </span><span class="o">-&gt;</span>
+    <span class="nv">stack: </span><span class="p">[]</span>
+    <span class="nv">debt: </span> <span class="p">{}</span>
+    <span class="p">(</span><span class="nx">debt</span><span class="p">[</span><span class="nx">key</span><span class="p">]</span><span class="o">:</span> <span class="mi">0</span><span class="p">)</span> <span class="k">for</span> <span class="nx">key</span><span class="p">,</span> <span class="nx">val</span> <span class="k">of</span> <span class="nx">INVERSES</span>
+    <span class="err">@</span><span class="nx">scan_tokens</span> <span class="p">(</span><span class="nx">prev</span><span class="p">,</span> <span class="nx">token</span><span class="p">,</span> <span class="nx">post</span><span class="p">,</span> <span class="nx">i</span><span class="p">)</span> <span class="o">=&gt;</span>
+      <span class="nv">tag: </span><span class="nx">token</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
+      <span class="nv">inv: </span><span class="nx">INVERSES</span><span class="p">[</span><span class="nx">token</span><span class="p">[</span><span class="mi">0</span><span class="p">]]</span>
+      <span class="k">if</span> <span class="nx">include</span> <span class="nx">EXPRESSION_START</span><span class="p">,</span> <span class="nx">tag</span>
+        <span class="nx">stack</span><span class="p">.</span><span class="nx">push</span> <span class="nx">token</span>
+        <span class="k">return</span> <span class="mi">1</span>
+      <span class="k">else</span> <span class="k">if</span> <span class="nx">include</span> <span class="nx">EXPRESSION_END</span><span class="p">,</span> <span class="nx">tag</span>
+        <span class="k">if</span> <span class="nx">debt</span><span class="p">[</span><span class="nx">inv</span><span class="p">]</span> <span class="o">&gt;</span> <span class="mi">0</span>
+          <span class="nx">debt</span><span class="p">[</span><span class="nx">inv</span><span class="p">]</span> <span class="o">-=</span> <span class="mi">1</span>
+          <span class="err">@</span><span class="nx">tokens</span><span class="p">.</span><span class="nx">splice</span> <span class="nx">i</span><span class="p">,</span> <span class="mi">1</span>
+          <span class="k">return</span> <span class="mi">0</span>
+        <span class="k">else</span>
+          <span class="nv">match: </span><span class="nx">stack</span><span class="p">.</span><span class="nx">pop</span><span class="p">()</span>
+          <span class="nv">mtag: </span> <span class="nx">match</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
+          <span class="k">return</span> <span class="mi">1</span> <span class="k">if</span> <span class="nx">tag</span> <span class="o">is</span> <span class="nx">INVERSES</span><span class="p">[</span><span class="nx">mtag</span><span class="p">]</span>
+          <span class="nx">debt</span><span class="p">[</span><span class="nx">mtag</span><span class="p">]</span> <span class="o">+=</span> <span class="mi">1</span>
+          <span class="nv">val: </span><span class="k">if</span> <span class="nx">mtag</span> <span class="o">is</span> <span class="s1">&#39;INDENT&#39;</span> <span class="k">then</span> <span class="nx">match</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span> <span class="k">else</span> <span class="nx">INVERSES</span><span class="p">[</span><span class="nx">mtag</span><span class="p">]</span>
+          <span class="err">@</span><span class="nx">tokens</span><span class="p">.</span><span class="nx">splice</span> <span class="nx">i</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="p">[</span><span class="nx">INVERSES</span><span class="p">[</span><span class="nx">mtag</span><span class="p">],</span> <span class="nx">val</span><span class="p">]</span>
+          <span class="k">return</span> <span class="mi">1</span>
+      <span class="k">else</span>
+        <span class="k">return</span> <span class="mi">1</span></pre></div>             </td>           </tr>                               <tr id="section-14">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-14">#</a>               </div>               <h2>Constants</h2>             </td>             <td class="code">               <div class="highlight"><pre></pre></div>             </td>           </tr>                               <tr id="section-15">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-15">#</a>               </div>               <p>List of the token pairs that must be balanced.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">BALANCED_PAIRS: </span><span class="p">[[</span><span class="s1">&#39;(&#39;</span><span class="p">,</span> <span class="s1">&#39;)&#39;</span><span class="p">],</span> <span class="p">[</span><span class="s1">&#39;[&#39;</span><span class="p">,</span> <span class="s1">&#39;]&#39;</span><span class="p">],</span> <span class="p">[</span><span class="s1">&#39;{&#39;</span><span class="p">,</span> <span class="s1">&#39;}&#39;</span><span class="p">],</span> <span class="p">[</span><span class="s1">&#39;INDENT&#39;</span><span class="p">,</span> <span class="s1">&#39;OUTDENT&#39;</span><span class="p">],</span>
+  <span class="p">[</span><span class="s1">&#39;PARAM_START&#39;</span><span class="p">,</span> <span class="s1">&#39;PARAM_END&#39;</span><span class="p">],</span> <span class="p">[</span><span class="s1">&#39;CALL_START&#39;</span><span class="p">,</span> <span class="s1">&#39;CALL_END&#39;</span><span class="p">],</span>
+  <span class="p">[</span><span class="s1">&#39;INDEX_START&#39;</span><span class="p">,</span> <span class="s1">&#39;INDEX_END&#39;</span><span class="p">],</span> <span class="p">[</span><span class="s1">&#39;SOAKED_INDEX_START&#39;</span><span class="p">,</span> <span class="s1">&#39;SOAKED_INDEX_END&#39;</span><span class="p">]]</span></pre></div>             </td>           </tr>                               <tr id="section-16">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-16">#</a>               </div>               <p>The inverse mappings of <code>BALANCED_PAIRS</code> we're trying to fix up, so we can
+look things up from either end.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">INVERSES: </span><span class="p">{}</span>
+<span class="k">for</span> <span class="nx">pair</span> <span class="k">in</span> <span class="nx">BALANCED_PAIRS</span>
+  <span class="nx">INVERSES</span><span class="p">[</span><span class="nx">pair</span><span class="p">[</span><span class="mi">0</span><span class="p">]]</span><span class="o">:</span> <span class="nx">pair</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span>
+  <span class="nx">INVERSES</span><span class="p">[</span><span class="nx">pair</span><span class="p">[</span><span class="mi">1</span><span class="p">]]</span><span class="o">:</span> <span class="nx">pair</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-17">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-17">#</a>               </div>               <p>The tokens that signal the start of a balanced pair.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">EXPRESSION_START: </span><span class="nx">pair</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="k">for</span> <span class="nx">pair</span> <span class="k">in</span> <span class="nx">BALANCED_PAIRS</span></pre></div>             </td>           </tr>                               <tr id="section-18">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-18">#</a>               </div>               <p>The tokens that signal the end of a balanced pair.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">EXPRESSION_END: </span>  <span class="nx">pair</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span> <span class="k">for</span> <span class="nx">pair</span> <span class="k">in</span> <span class="nx">BALANCED_PAIRS</span></pre></div>             </td>           </tr>                               <tr id="section-19">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-19">#</a>               </div>               <p>Tokens that indicate the close of a clause of an expression.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">EXPRESSION_CLOSE: </span><span class="p">[</span><span class="s1">&#39;CATCH&#39;</span><span class="p">,</span> <span class="s1">&#39;WHEN&#39;</span><span class="p">,</span> <span class="s1">&#39;ELSE&#39;</span><span class="p">,</span> <span class="s1">&#39;FINALLY&#39;</span><span class="p">].</span><span class="nx">concat</span> <span class="nx">EXPRESSION_END</span></pre></div>             </td>           </tr>                               <tr id="section-20">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-20">#</a>               </div>               <p>Tokens that, if followed by an <code>IMPLICIT_CALL</code>, indicate a function invocation.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">IMPLICIT_FUNC: </span> <span class="p">[</span><span class="s1">&#39;IDENTIFIER&#39;</span><span class="p">,</span> <span class="s1">&#39;SUPER&#39;</span><span class="p">,</span> <span class="s1">&#39;)&#39;</span><span class="p">,</span> <span class="s1">&#39;CALL_END&#39;</span><span class="p">,</span> <span class="s1">&#39;]&#39;</span><span class="p">,</span> <span class="s1">&#39;INDEX_END&#39;</span><span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-21">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-21">#</a>               </div>               <p>If preceded by an <code>IMPLICIT_FUNC</code>, indicates a function invocation.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">IMPLICIT_CALL: </span> <span class="p">[</span><span class="s1">&#39;IDENTIFIER&#39;</span><span class="p">,</span> <span class="s1">&#39;NUMBER&#39;</span><span class="p">,</span> <span class="s1">&#39;STRING&#39;</span><span class="p">,</span> <span class="s1">&#39;JS&#39;</span><span class="p">,</span> <span class="s1">&#39;REGEX&#39;</span><span class="p">,</span> <span class="s1">&#39;NEW&#39;</span><span class="p">,</span> <span class="s1">&#39;PARAM_START&#39;</span><span class="p">,</span>
+                 <span class="s1">&#39;TRY&#39;</span><span class="p">,</span> <span class="s1">&#39;DELETE&#39;</span><span class="p">,</span> <span class="s1">&#39;TYPEOF&#39;</span><span class="p">,</span> <span class="s1">&#39;SWITCH&#39;</span><span class="p">,</span>
+                 <span class="s1">&#39;TRUE&#39;</span><span class="p">,</span> <span class="s1">&#39;FALSE&#39;</span><span class="p">,</span> <span class="s1">&#39;YES&#39;</span><span class="p">,</span> <span class="s1">&#39;NO&#39;</span><span class="p">,</span> <span class="s1">&#39;ON&#39;</span><span class="p">,</span> <span class="s1">&#39;OFF&#39;</span><span class="p">,</span> <span class="s1">&#39;!&#39;</span><span class="p">,</span> <span class="s1">&#39;!!&#39;</span><span class="p">,</span> <span class="s1">&#39;NOT&#39;</span><span class="p">,</span>
+                 <span class="s1">&#39;@&#39;</span><span class="p">,</span> <span class="s1">&#39;-&gt;&#39;</span><span class="p">,</span> <span class="s1">&#39;=&gt;&#39;</span><span class="p">,</span> <span class="s1">&#39;[&#39;</span><span class="p">,</span> <span class="s1">&#39;(&#39;</span><span class="p">,</span> <span class="s1">&#39;{&#39;</span><span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-22">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-22">#</a>               </div>               <p>Tokens indicating that the implicit call must enclose a block of expressions.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">IMPLICIT_BLOCK: </span><span class="p">[</span><span class="s1">&#39;-&gt;&#39;</span><span class="p">,</span> <span class="s1">&#39;=&gt;&#39;</span><span class="p">,</span> <span class="s1">&#39;{&#39;</span><span class="p">,</span> <span class="s1">&#39;[&#39;</span><span class="p">,</span> <span class="s1">&#39;,&#39;</span><span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-23">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-23">#</a>               </div>               <p>Tokens that always mark the end of an implicit call for single-liners.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">IMPLICIT_END: </span>  <span class="p">[</span><span class="s1">&#39;IF&#39;</span><span class="p">,</span> <span class="s1">&#39;UNLESS&#39;</span><span class="p">,</span> <span class="s1">&#39;FOR&#39;</span><span class="p">,</span> <span class="s1">&#39;WHILE&#39;</span><span class="p">,</span> <span class="s1">&#39;TERMINATOR&#39;</span><span class="p">,</span> <span class="s1">&#39;INDENT&#39;</span><span class="p">,</span> <span class="s1">&#39;OUTDENT&#39;</span><span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-24">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-24">#</a>               </div>               <p>Single-line flavors of block expressions that have unclosed endings.
+The grammar can't disambiguate them, so we insert the implicit indentation.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">SINGLE_LINERS: </span><span class="p">[</span><span class="s1">&#39;ELSE&#39;</span><span class="p">,</span> <span class="s2">&quot;-&gt;&quot;</span><span class="p">,</span> <span class="s2">&quot;=&gt;&quot;</span><span class="p">,</span> <span class="s1">&#39;TRY&#39;</span><span class="p">,</span> <span class="s1">&#39;FINALLY&#39;</span><span class="p">,</span> <span class="s1">&#39;THEN&#39;</span><span class="p">]</span>
+<span class="nv">SINGLE_CLOSERS: </span><span class="p">[</span><span class="s1">&#39;TERMINATOR&#39;</span><span class="p">,</span> <span class="s1">&#39;CATCH&#39;</span><span class="p">,</span> <span class="s1">&#39;FINALLY&#39;</span><span class="p">,</span> <span class="s1">&#39;ELSE&#39;</span><span class="p">,</span> <span class="s1">&#39;OUTDENT&#39;</span><span class="p">,</span> <span class="s1">&#39;LEADING_WHEN&#39;</span><span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-25">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-25">#</a>               </div>               <h2>Utility Functions</h2>             </td>             <td class="code">               <div class="highlight"><pre></pre></div>             </td>           </tr>                               <tr id="section-26">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-26">#</a>               </div>               <p>Does a list include a value?</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">include: </span><span class="p">(</span><span class="nx">list</span><span class="p">,</span> <span class="nx">value</span><span class="p">)</span> <span class="o">-&gt;</span>
+  <span class="nx">list</span><span class="p">.</span><span class="nx">indexOf</span><span class="p">(</span><span class="nx">value</span><span class="p">)</span> <span class="o">&gt;=</span> <span class="mi">0</span>
+
+</pre></div>             </td>           </tr>                </tbody>     </table>   </div> </body> </html> 

documentation/docs/scope.html

@@ -0,0 +1,42 @@
+<!DOCTYPE html>  <html> <head>   <title>scope.coffee</title>   <meta http-equiv="content-type" content="text/html; charset=UTF-8">   <link rel="stylesheet" media="all" href="docco.css" /> </head> <body>   <div id="container">     <div id="background"></div>            <div id="jump_to">         Jump To &hellip;         <div id="jump_wrapper">           <div id="jump_page">                                           <a class="source" href="cake.html">                 cake.coffee               </a>                                           <a class="source" href="coffee-script.html">                 coffee-script.coffee               </a>                                           <a class="source" href="command.html">                 command.coffee               </a>                                           <a class="source" href="grammar.html">                 grammar.coffee               </a>                                           <a class="source" href="lexer.html">                 lexer.coffee               </a>                                           <a class="source" href="nodes.html">                 nodes.coffee               </a>                                           <a class="source" href="optparse.html">                 optparse.coffee               </a>                                           <a class="source" href="repl.html">                 repl.coffee               </a>                                           <a class="source" href="rewriter.html">                 rewriter.coffee               </a>                                           <a class="source" href="scope.html">                 scope.coffee               </a>                        </div>         </div>       </div>          <table cellpadding="0" cellspacing="0">       <thead>         <tr>           <th class="docs">             <h1>               scope.coffee             </h1>           </th>           <th class="code">           </th>         </tr>       </thead>       <tbody>                               <tr id="section-1">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-1">#</a>               </div>               <p>The <strong>Scope</strong> class regulates lexical scoping within CoffeeScript. As you
+generate code, you create a tree of scopes in the same shape as the nested
+function bodies. Each scope knows about the variables declared within it,
+and has a reference to its parent enclosing scope. In this way, we know which
+variables are new and need to be declared with <code>var</code>, and which are shared
+with the outside.</p>             </td>             <td class="code">               <div class="highlight"><pre></pre></div>             </td>           </tr>                               <tr id="section-2">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-2">#</a>               </div>               <p>Set up exported variables for both <strong>Node.js</strong> and the browser.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="k">this</span><span class="p">.</span><span class="nv">exports: </span><span class="k">this</span> <span class="nx">unless</span> <span class="nx">process</span><span class="o">?</span>
+
+<span class="nv">exports.Scope: </span><span class="nx">class</span> <span class="nx">Scope</span></pre></div>             </td>           </tr>                               <tr id="section-3">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-3">#</a>               </div>               <p>Initialize a scope with its parent, for lookups up the chain,
+as well as a reference to the <strong>Expressions</strong> node is belongs to, which is
+where it should declare its variables, and a reference to the function that
+it wraps.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">constructor: </span><span class="p">(</span><span class="nx">parent</span><span class="p">,</span> <span class="nx">expressions</span><span class="p">,</span> <span class="nx">method</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="p">[</span><span class="err">@</span><span class="nx">parent</span><span class="p">,</span> <span class="err">@</span><span class="nx">expressions</span><span class="p">,</span> <span class="err">@</span><span class="nx">method</span><span class="p">]</span><span class="o">:</span> <span class="p">[</span><span class="nx">parent</span><span class="p">,</span> <span class="nx">expressions</span><span class="p">,</span> <span class="nx">method</span><span class="p">]</span>
+    <span class="err">@</span><span class="nv">variables: </span><span class="p">{}</span>
+    <span class="err">@</span><span class="nv">temp_var: </span><span class="k">if</span> <span class="err">@</span><span class="nx">parent</span> <span class="k">then</span> <span class="err">@</span><span class="nx">parent</span><span class="p">.</span><span class="nx">temp_var</span> <span class="k">else</span> <span class="s1">&#39;_a&#39;</span></pre></div>             </td>           </tr>                               <tr id="section-4">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-4">#</a>               </div>               <p>Look up a variable name in lexical scope, and declare it if it does not
+already exist.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">find: </span><span class="p">(</span><span class="nx">name</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="k">return</span> <span class="kc">true</span> <span class="k">if</span> <span class="err">@</span><span class="nx">check</span> <span class="nx">name</span>
+    <span class="err">@</span><span class="nx">variables</span><span class="p">[</span><span class="nx">name</span><span class="p">]</span><span class="o">:</span> <span class="s1">&#39;var&#39;</span>
+    <span class="kc">false</span></pre></div>             </td>           </tr>                               <tr id="section-5">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-5">#</a>               </div>               <p>Reserve a variable name as originating from a function parameter for this
+scope. No <code>var</code> required for internal references.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">parameter: </span><span class="p">(</span><span class="nx">name</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nx">variables</span><span class="p">[</span><span class="nx">name</span><span class="p">]</span><span class="o">:</span> <span class="s1">&#39;param&#39;</span></pre></div>             </td>           </tr>                               <tr id="section-6">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-6">#</a>               </div>               <p>Just check to see if a variable has already been declared, without reserving.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">check: </span><span class="p">(</span><span class="nx">name</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="k">return</span> <span class="kc">true</span> <span class="k">if</span> <span class="err">@</span><span class="nx">variables</span><span class="p">[</span><span class="nx">name</span><span class="p">]</span>
+    <span class="o">!!</span><span class="p">(</span><span class="err">@</span><span class="nx">parent</span> <span class="o">and</span> <span class="err">@</span><span class="nx">parent</span><span class="p">.</span><span class="nx">check</span><span class="p">(</span><span class="nx">name</span><span class="p">))</span></pre></div>             </td>           </tr>                               <tr id="section-7">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-7">#</a>               </div>               <p>If we need to store an intermediate result, find an available name for a
+compiler-generated variable. <code>_a</code>, <code>_b</code>, and so on...</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">free_variable: </span><span class="o">-&gt;</span>
+    <span class="k">while</span> <span class="err">@</span><span class="nx">check</span> <span class="err">@</span><span class="nx">temp_var</span>
+      <span class="nv">ordinal: </span><span class="mi">1</span> <span class="o">+</span> <span class="nb">parseInt</span> <span class="err">@</span><span class="nx">temp_var</span><span class="p">.</span><span class="nx">substr</span><span class="p">(</span><span class="mi">1</span><span class="p">),</span> <span class="mi">36</span>
+      <span class="err">@</span><span class="nv">temp_var: </span><span class="s1">&#39;_&#39;</span> <span class="o">+</span> <span class="nx">ordinal</span><span class="p">.</span><span class="nx">toString</span><span class="p">(</span><span class="mi">36</span><span class="p">).</span><span class="nx">replace</span><span class="p">(</span><span class="sr">/\d/g</span><span class="p">,</span> <span class="s1">&#39;a&#39;</span><span class="p">)</span>
+    <span class="err">@</span><span class="nx">variables</span><span class="p">[</span><span class="err">@</span><span class="nx">temp_var</span><span class="p">]</span><span class="o">:</span> <span class="s1">&#39;var&#39;</span>
+    <span class="err">@</span><span class="nx">temp_var</span></pre></div>             </td>           </tr>                               <tr id="section-8">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-8">#</a>               </div>               <p>Ensure that an assignment is made at the top of this scope
+(or at the top-level scope, if requested).</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">assign: </span><span class="p">(</span><span class="nx">name</span><span class="p">,</span> <span class="nx">value</span><span class="p">,</span> <span class="nx">top_level</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="k">return</span> <span class="err">@</span><span class="nx">parent</span><span class="p">.</span><span class="nx">assign</span><span class="p">(</span><span class="nx">name</span><span class="p">,</span> <span class="nx">value</span><span class="p">,</span> <span class="nx">top_level</span><span class="p">)</span> <span class="k">if</span> <span class="nx">top_level</span> <span class="o">and</span> <span class="err">@</span><span class="nx">parent</span>
+    <span class="err">@</span><span class="nx">variables</span><span class="p">[</span><span class="nx">name</span><span class="p">]</span><span class="o">:</span> <span class="p">{</span><span class="nv">value: </span><span class="nx">value</span><span class="p">,</span> <span class="nv">assigned: </span><span class="kc">true</span><span class="p">}</span></pre></div>             </td>           </tr>                               <tr id="section-9">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-9">#</a>               </div>               <p>Does this scope reference any variables that need to be declared in the
+given function body?</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">has_declarations: </span><span class="p">(</span><span class="nx">body</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="nx">body</span> <span class="o">is</span> <span class="err">@</span><span class="nx">expressions</span> <span class="o">and</span> <span class="err">@</span><span class="nx">declared_variables</span><span class="p">().</span><span class="nx">length</span></pre></div>             </td>           </tr>                               <tr id="section-10">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-10">#</a>               </div>               <p>Does this scope reference any assignments that need to be declared at the
+top of the given function body?</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">has_assignments: </span><span class="p">(</span><span class="nx">body</span><span class="p">)</span> <span class="o">-&gt;</span>
+    <span class="nx">body</span> <span class="o">is</span> <span class="err">@</span><span class="nx">expressions</span> <span class="o">and</span> <span class="err">@</span><span class="nx">assigned_variables</span><span class="p">().</span><span class="nx">length</span></pre></div>             </td>           </tr>                               <tr id="section-11">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-11">#</a>               </div>               <p>Return the list of variables first declared in this scope.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">declared_variables: </span><span class="o">-&gt;</span>
+    <span class="p">(</span><span class="nx">key</span> <span class="k">for</span> <span class="nx">key</span><span class="p">,</span> <span class="nx">val</span> <span class="k">of</span> <span class="err">@</span><span class="nx">variables</span> <span class="k">when</span> <span class="nx">val</span> <span class="o">is</span> <span class="s1">&#39;var&#39;</span><span class="p">).</span><span class="nx">sort</span><span class="p">()</span></pre></div>             </td>           </tr>                               <tr id="section-12">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-12">#</a>               </div>               <p>Return the list of assignments that are supposed to be made at the top
+of this scope.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">assigned_variables: </span><span class="o">-&gt;</span>
+    <span class="s2">&quot;$key = ${val.value}&quot;</span> <span class="k">for</span> <span class="nx">key</span><span class="p">,</span> <span class="nx">val</span> <span class="k">of</span> <span class="err">@</span><span class="nx">variables</span> <span class="k">when</span> <span class="nx">val</span><span class="p">.</span><span class="nx">assigned</span></pre></div>             </td>           </tr>                               <tr id="section-13">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-13">#</a>               </div>               <p>Compile the JavaScript for all of the variable declarations in this scope.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">compiled_declarations: </span><span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nx">declared_variables</span><span class="p">().</span><span class="nx">join</span> <span class="s1">&#39;, &#39;</span></pre></div>             </td>           </tr>                               <tr id="section-14">             <td class="docs">               <div class="octowrap">                 <a class="octothorpe" href="#section-14">#</a>               </div>               <p>Compile the JavaScript for all of the variable assignments in this scope.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">compiled_assignments: </span><span class="o">-&gt;</span>
+    <span class="err">@</span><span class="nx">assigned_variables</span><span class="p">().</span><span class="nx">join</span> <span class="s1">&#39;, &#39;</span>
+
+</pre></div>             </td>           </tr>                </tbody>     </table>   </div> </body> </html> 

documentation/index.html.erb

@@ -1,7 +1,7 @@
 <%
   require 'uv'
   def code_for(file, executable=false)
-    @stripper ||= /(\A\(function\(\)\{\n|\}\)\(\);\Z|^  )/
+    @stripper ||= /(\A\(function\(\)\{\n|\}\)\(\);\n*\Z|^  )/
     return '' unless File.exists?("documentation/js/#{file}.js")
     cs = File.read("documentation/coffee/#{file}.coffee")
     js = File.read("documentation/js/#{file}.js").gsub(@stripper, '')
@@ -22,14 +22,15 @@
   <title>CoffeeScript</title>
   <link rel="stylesheet" type="text/css" href="documentation/css/docs.css" />
   <link rel="stylesheet" type="text/css" href="documentation/css/idle.css" />
+  <link rel="shortcut icon" href="documentation/images/favicon.ico" />
 </head>
-<body>
+<body class="minimized">
 
   <div id="fadeout"></div>
 
   <div id="flybar">
     <a id="logo" href="#top"> </a>
-    <div class="navigation">
+    <div class="navigation toc">
       <div class="button">
         Table of Contents
       </div>
@@ -51,7 +52,7 @@
         <a href="#slice_splice">Array Slicing and Splicing with Ranges</a>
         <a href="#expressions">Everything is an Expression</a>
         <a href="#existence">The Existential Operator</a>
-        <a href="#inheritance">Inheritance, and Calling Super from a Subclass</a>
+        <a href="#classes">Classes, Inheritance, and Super</a>
         <a href="#pattern_matching">Pattern Matching</a>
         <a href="#fat_arrow">Function Binding</a>
         <a href="#embedded">Embedded JavaScript</a>
@@ -59,7 +60,9 @@
         <a href="#try">Try/Catch/Finally</a>
         <a href="#comparisons">Chained Comparisons</a>
         <a href="#strings">Multiline Strings and Heredocs</a>
+        <a href="#interpolation">String Interpolation</a>
         <a href="#cake">Cake, and Cakefiles</a>
+        <a href="#scripts">"text/coffeescript" Script Tags</a>
         <a href="#resources">Resources</a>
         <a href="#change_log">Change Log</a>
       </div>
@@ -70,17 +73,36 @@
       </div>
       <div class="contents repl_wrapper">
         <div class="code">
-          <textarea id="repl_source">reverse: (string) ->
+          <div id="repl_source_wrap"><textarea id="repl_source">reverse: (string) ->
   string.split('').reverse().join ''
 
-alert reverse '!tpircseeffoC'</textarea>
+alert reverse '!tpircseeffoC'</textarea></div>
           <pre id="repl_results"></pre>
-          <button class="compile" onclick="javascript: repl_compile();">compile</button>
-          <button class="run" onclick="javascript: repl_run();">run</button>
+          <button class="full_screen">go full screen</button>
+          <button class="minimize">minimize</button>
+          <button class="run">run</button>
           <br class="clear" />
         </div>
       </div>
     </div>
+    <div class="navigation annotated">
+      <div class="button">
+        Annotated Source
+      </div>
+      <div class="contents">
+        <a href="documentation/docs/grammar.html">The Grammar &mdash; src/grammar</a>
+        <a href="documentation/docs/lexer.html">The Lexer &mdash; src/lexer</a>
+        <a href="documentation/docs/rewriter.html">The Rewriter &mdash; src/rewriter</a>
+        <a href="documentation/docs/nodes.html">The Syntax Tree &mdash; src/nodes</a>
+        <a href="documentation/docs/scope.html">Lexical Scope &mdash; src/scope</a>
+        <a href="documentation/docs/coffee-script.html">The CoffeeScript Module &mdash; src/coffee-script</a>
+        <a href="documentation/docs/cake.html">Cake &amp; Cakefiles &mdash; src/cake</a>
+        <a href="documentation/docs/command.html">"coffee" Command-Line Utility &mdash; src/command</a>
+        <a href="documentation/docs/optparse.html">Option Parsing &mdash; src/optparse</a>
+        <a href="documentation/docs/repl.html">Interactive REPL &mdash; src/repl</a>
+      </div>
+    </div>
+    <div id="error" style="display:none;"></div>
   </div>
 
   <div class="container">
@@ -107,7 +129,7 @@ alert reverse '!tpircseeffoC'</textarea>
 
     <p>
       <b>Latest Version:</b>
-      <a href="http://github.com/jashkenas/coffee-script/tarball/0.5.1">0.5.1</a>
+      <a href="http://github.com/jashkenas/coffee-script/tarball/0.5.5">0.5.5</a>
     </p>
 
     <h2>
@@ -138,7 +160,7 @@ alert reverse '!tpircseeffoC'</textarea>
     </h2>
 
     <p>
-      The CoffeeScript compiler is written in pure CoffeeScript, using a 
+      The CoffeeScript compiler is written in pure CoffeeScript, using a
       <a href="http://github.com/jashkenas/coffee-script/blob/master/src/grammar.coffee">small DSL</a>
       on top of the <a href="http://github.com/zaach/jison">Jison parser generator</a>, and is available
       as a <a href="http://nodejs.org/">Node.js</a> utility. The core compiler however,
@@ -149,10 +171,11 @@ alert reverse '!tpircseeffoC'</textarea>
 
     <p>
       To install, first make sure you have a working version of
-      <a href="http://nodejs.org/">Node.js</a>, 0.1.30 or higher. Then clone the CoffeeScript
+      <a href="http://nodejs.org/">Node.js</a> version 0.1.31 or higher.
+      Then clone the CoffeeScript
       <a href="http://github.com/jashkenas/coffee-script">source repository</a>
       from GitHub, or download the latest
-      release: <a href="http://github.com/jashkenas/coffee-script/tarball/0.5.1">0.5.1</a>.
+      release: <a href="http://github.com/jashkenas/coffee-script/tarball/0.5.5">0.5.5</a>.
       To install the CoffeeScript compiler system-wide
       under <tt>/usr/local</tt>, open the directory and run:
     </p>
@@ -161,10 +184,9 @@ alert reverse '!tpircseeffoC'</textarea>
 sudo bin/cake install</pre>
 
     <p>
-      This provides the <tt>coffee</tt> command, which can
-      be used to compile CoffeeScript <tt>.coffee</tt> files into JavaScript, as
-      well as debug them. The <tt>coffee</tt>
-      command also provides direct evaluation and an interactive REPL.
+      This provides the <tt>coffee</tt> command, which will execute CoffeeScripts
+      under Node.js by default, but is also used to compile CoffeeScript
+      <tt>.coffee</tt> files into JavaScript, or to run an an interactive REPL.
       When compiling to JavaScript, <tt>coffee</tt> writes the output
       as <tt>.js</tt> files in the same directory by default, but output
       can be customized with the following options:
@@ -172,22 +194,25 @@ sudo bin/cake install</pre>
 
     <table>
       <tr>
-        <td width="25%"><code>-i, --interactive</code></td>
+        <td><code>-c, --compile</code></td>
         <td>
-          Launch an interactive CoffeeScript session to try short snippets.
+          Compile a <tt>.coffee</tt> script into a <tt>.js</tt> JavaScript file
+          of the same name.
         </td>
       </tr>
       <tr>
-        <td><code>-r, --run</code></td>
+        <td width="25%"><code>-i, --interactive</code></td>
         <td>
-          Compile and execute a given CoffeeScript without saving the intermediate
-          JavaScript.
+          Launch an interactive CoffeeScript session to try short snippets.
+          More pleasant if wrapped with
+          <a href="http://utopia.knoware.nl/~hlub/uck/rlwrap/rlwrap.html">rlwrap</a>.
         </td>
       </tr>
       <tr>
         <td><code>-o, --output [DIR]</code></td>
         <td>
           Write out all compiled JavaScript files into the specified directory.
+          Use in conjunction with <tt>--compile</tt> or <tt>--watch</tt>.
         </td>
       </tr>
       <tr>
@@ -214,6 +239,14 @@ sudo bin/cake install</pre>
           conjunction with <tt>--watch</tt>)
         </td>
       </tr>
+      <tr>
+        <td><code>-s, --stdio</code></td>
+        <td>
+          Pipe in CoffeeScript to STDIN and get back JavaScript over STDOUT.
+          Good for use with processes written in other languages. An example:<br />
+          <tt>cat src/cake.coffee | coffee -s</tt>
+        </td>
+      </tr>
       <tr>
         <td><code>-e, --eval</code></td>
         <td>
@@ -222,7 +255,7 @@ sudo bin/cake install</pre>
         </td>
       </tr>
       <tr>
-        <td><code>-n, --no-wrap</code></td>
+        <td><code>--no-wrap</code></td>
         <td>
           Compile the JavaScript without the top-level function safety wrapper.
           (Used for CoffeeScript as a Node.js module.)
@@ -236,7 +269,7 @@ sudo bin/cake install</pre>
         </td>
       </tr>
       <tr>
-        <td><code>-tr, --tree</code></td>
+        <td><code>-n, --nodes</code></td>
         <td>
           Instead of compiling the CoffeeScript, just lex and parse it, and print
           out the parse tree:
@@ -257,7 +290,7 @@ Expressions
     </p>
 
     <pre>
-coffee path/to/script.coffee
+coffee -c path/to/script.coffee
 coffee --interactive
 coffee --watch --lint experimental.coffee
 coffee --print app/scripts/*.coffee > concatenation.js</pre>
@@ -580,8 +613,8 @@ coffee --print app/scripts/*.coffee > concatenation.js</pre>
     </p>
 
     <p>
-      <span id="inheritance" class="bookmark"></span>
-      <b class="header">Inheritance, and Calling Super from a Subclass</b>
+      <span id="classes" class="bookmark"></span>
+      <b class="header">Classes, Inheritance, and Super</b>
       JavaScript's prototypal inheritance has always been a bit of a
       brain-bender, with a whole family tree of libraries that provide a cleaner
       syntax for classical inheritance on top of JavaScript's prototypes:
@@ -595,12 +628,20 @@ coffee --print app/scripts/*.coffee > concatenation.js</pre>
       set the prototype chain.
     </p>
     <p>
-      CoffeeScript provides <tt>extends</tt>
-      to help with prototype setup, <tt>::</tt> for quick access to an
-      object's prototype, and converts <tt>super()</tt> into a call against
-      the immediate ancestor's method of the same name.
+      Instead of repetitively attaching functions to a prototype, CoffeeScript
+      provides a basic <tt>class</tt> structure that allows you to name your class,
+      set the superclass, assign prototypal properties, and define the constructor,
+      in a single assignable expression.
     </p>
-    <%= code_for('super', true) %>
+    <%= code_for('classes', true) %>
+    <p>
+      If structuring your prototypes classically isn't your cup of tea, CoffeeScript
+      provides a couple of lower-level conveniences. The <tt>extends</tt> operator
+      helps with proper prototype setup, as seen above, <tt>::</tt> gives you
+      quick access to an object's prototype, and <tt>super()</tt>
+      is converted into a call against the immediate ancestor's method of the same name.
+    </p>
+    <%= code_for('prototypes', '"one_two".dasherize()') %>
 
     <p>
       <span id="pattern_matching" class="bookmark"></span>
@@ -628,6 +669,14 @@ coffee --print app/scripts/*.coffee > concatenation.js</pre>
     <p>
       <span id="fat_arrow" class="bookmark"></span>
       <b class="header">Function binding</b>
+      In JavaScript, the <tt>this</tt> keyword is dynamically scoped to mean the
+      object that the current function is attached to. If you pass a function as
+      as callback, or attach it to a different object, the original value of <tt>this</tt>
+      will be lost. If you're not familiar with this behavior,
+      <a href="http://www.digital-web.com/articles/scope_in_javascript/">this Digital Web article</a>
+      gives a good overview of the quirks.
+    </p>
+    <p>
       The fat arrow <tt>=></tt> can be used to both define a function, and to bind
       it to the current value of <tt>this</tt>, right on the spot. This is helpful
       when using callback-based libraries like Prototype or jQuery, for creating
@@ -636,6 +685,11 @@ coffee --print app/scripts/*.coffee > concatenation.js</pre>
       properties of the <tt>this</tt> where they're defined.
     </p>
     <%= code_for('fat_arrow') %>
+    <p>
+      If we had used <tt>-></tt> in the callback above, <tt>@customer</tt> would
+      have referred to the undefined "customer" property of the DOM element,
+      and trying to call <tt>purchase()</tt> on it would have raised an exception.
+    </p>
 
     <p>
       <span id="embedded" class="bookmark"></span>
@@ -696,6 +750,19 @@ coffee --print app/scripts/*.coffee > concatenation.js</pre>
     </p>
     <%= code_for('heredocs') %>
 
+    <p>
+      <span id="interpolation" class="bookmark"></span>
+      <b class="header">String Interpolation</b>
+      A version of <a href="http://wiki.ecmascript.org/doku.php?id=strawman:string_interpolation">ECMAScript Harmony's proposed string interpolation</a>
+      is included in CoffeeScript. Simple variables can be included by marking
+      them with a dollar sign.
+    </p>
+    <%= code_for('interpolation', 'quote') %>
+    <p>
+      And arbitrary expressions can be interpolated by using brackets <tt>${ ... }</tt>
+    </p>
+    <%= code_for('interpolation_expression', 'sentence') %>
+
     <h2>
       <span id="cake" class="bookmark"></span>
       Cake, and Cakefiles
@@ -717,6 +784,34 @@ coffee --print app/scripts/*.coffee > concatenation.js</pre>
     </p>
     <%= code_for('cake_tasks') %>
 
+    <h2>
+      <span id="scripts" class="bookmark"></span>
+      "text/coffeescript" Script Tags
+    </h2>
+
+    <p>
+      While it's not recommended for serious use, CoffeeScripts may be included
+      directly within the browser using <tt>&lt;script type="text/coffeescript"&gt;</tt>
+      tags. The source includes a compressed and minified version of the compiler
+      (<a href="extras/coffee-script.js">Download current version here, 43k when gzipped</a>)
+      as <tt>extras/coffee-script.js</tt>. Include this file on a page with
+      inline CoffeeScript tags, and it will compile and evaluate them in order.
+    </p>
+
+    <p>
+      In fact, the little bit of glue script that runs "Try CoffeeScript" above,
+      as well as jQuery for the menu, is implemented in just this way.
+      View source and look at the bottom of the page to see the example.
+      Including the script also gives you access to <tt>CoffeeScript.compile()</tt>
+      so you can pop open Firebug and try compiling some strings.
+    </p>
+
+    <p>
+      The usual caveats about CoffeeScript apply &mdash; your inline scripts will
+      run within a closure wrapper, so if you want to expose global variables or
+      functions, attach them to the <tt>window</tt> object.
+    </p>
+
     <h2>
       <span id="resources" class="bookmark"></span>
       Resources
@@ -729,14 +824,32 @@ coffee --print app/scripts/*.coffee > concatenation.js</pre>
         <tt>bin/cake test</tt> to run the test suite,<br />
         <tt>bin/cake build</tt> to rebuild the CoffeeScript compiler, and <br />
         <tt>bin/cake build:parser</tt> to regenerate the Jison parser if you're
-        working on the grammar.
+        working on the grammar. <br /><br />
+        <tt>bin/cake build:full</tt> is a good command to run when you're working
+        on the core language. It'll refresh the lib directory
+        (in case you broke something), build your altered compiler, use that to
+        rebuild itself (a good sanity test) and then run all of the tests. If
+        they pass, there's a good chance you've made a successful change.
       </li>
       <li>
         <a href="http://github.com/jashkenas/coffee-script/issues">CoffeeScript Issues</a><br />
         Bugs reports, feature requests, and general discussion all belong here.
       </li>
       <li>
-        If you'd like to chat, stop by <tt>#coffeescript</tt> on Freenode.
+        If you'd like to chat, stop by <tt>#coffeescript</tt> on Freenode in the
+        IRC client of your choice, or on
+        <a href="http://webchat.freenode.net/">webchat.freenode.net</a>.
+      </li>
+      <li>
+        <b>defunkt</b>'s <a href="http://github.com/defunkt/coffee-mode">CoffeeScript Major Mode</a>
+        &mdash; a Emacs major mode that provides syntax highlighting, indentation
+        support, and some bonus commands. (For Vim and TextMate highlighters,
+        see the <tt>extras</tt> directory of the main repository.)
+      </li>
+      <li>
+        <b>mattly</b>'s <a href="http://github.com/mattly/rack-coffee">rack-coffee</a>
+        &mdash; a small Rack middleware for serving CoffeeScript files as
+        compiled JavaScript on the fly.
       </li>
     </ul>
 
@@ -744,7 +857,42 @@ coffee --print app/scripts/*.coffee > concatenation.js</pre>
       <span id="change_log" class="bookmark"></span>
       Change Log
     </h2>
-    
+
+    <p>
+      <b class="header" style="margin-top: 20px;">0.5.5</b>
+      String interpolation, contributed by
+      <a href="http://github.com/StanAngeloff">Stan Angeloff</a>.
+      Since <tt>--run</tt> has been the default since <b>0.5.3</b>, updating
+      <tt>--stdio</tt> and <tt>--eval</tt> to run by default, pass <tt>--compile</tt>
+      as well if you'd like to print the result.
+    </p>
+
+    <p>
+      <b class="header" style="margin-top: 20px;">0.5.4</b>
+      Bugfix that corrects the Node.js global constants <tt>__filename</tt> and
+      <tt>__dirname</tt>. Tweaks for more flexible parsing of nested function
+      literals and improperly-indented comments. Updates for the latest Node.js API.
+    </p>
+
+    <p>
+      <b class="header" style="margin-top: 20px;">0.5.3</b>
+      CoffeeScript now has a syntax for defining classes. Many of the core
+      components (Nodes, Lexer, Rewriter, Scope, Optparse) are using them.
+      Cakefiles can use <tt>optparse.coffee</tt> to define options for tasks.
+      <tt>--run</tt> is now the default flag for the <tt>coffee</tt> command,
+      use <tt>--compile</tt> to save JavaScripts. Bugfix for an ambiguity between
+      RegExp literals and chained divisions.
+    </p>
+
+    <p>
+      <b class="header" style="margin-top: 20px;">0.5.2</b>
+      Added a compressed version of the compiler for inclusion in web pages as
+      <br  /><tt>extras/coffee-script.js</tt>. It'll automatically run any script tags
+      with type <tt>text/coffeescript</tt> for you. Added a <tt>--stdio</tt> option
+      to the <tt>coffee</tt> command, for piped-in compiles.
+    </p>
+
+
     <p>
       <b class="header" style="margin-top: 20px;">0.5.1</b>
       Improvements to null soaking with the existential operator, including
@@ -915,53 +1063,60 @@ coffee --print app/scripts/*.coffee > concatenation.js</pre>
 
   </div>
 
-  <script type="text/javascript" src="lib/rewriter.js"></script>
-  <script type="text/javascript" src="lib/lexer.js"></script>
-  <script type="text/javascript" src="lib/parser.js"></script>
-  <script type="text/javascript" src="lib/scope.js"></script>
-  <script type="text/javascript" src="lib/nodes.js"></script>
-  <script type="text/javascript" src="lib/coffee-script.js"></script>
+  <script type="text/coffeescript">
 
-  <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js"></script>
+    # Set up the compilation function, to run when you stop typing.
+    compile_source: ->
+      source: $('#repl_source').val()
+      window.compiled_js: ''
+      try
+        window.compiled_js: CoffeeScript.compile source, {no_wrap: true}
+        $('#repl_results').text window.compiled_js
+        $('#error').hide();
+      catch error
+        $('#error').text(error.message).show();
 
-  <script type="text/javascript">
-    window.repl_compile = function() {
-      var source = $('#repl_source').val();
-      window.compiled_js = '';
-      try {
-        window.compiled_js = CoffeeScript.compile(source, {no_wrap: true});
-      } catch(error) {
-        alert(error);
-      }
-      $('#repl_results').html(window.compiled_js);
-    };
-    window.repl_run = function() {
-      try {
-        eval(window.compiled_js);
-      } catch(error) {
-        alert(error);
-      }
-    };
+    # Listen for keypresses and recompile.
+    $('#repl_source').keyup -> compile_source()
+
+    # Eval the compiled js.
+    $('button.run').click ->
+      try
+        eval window.compiled_js
+      catch error then alert error
+
+    current_nav: null
+
+    # Helper to hide the menus.
+    close_menus: ->
+      if current_nav
+        current_nav.removeClass 'active'
+        document.body.className: 'minimized'
+      current_nav: null
+
+    # Bind navigation buttons to open the menus.
+    $('.navigation').click (e) ->
+      return if e.target.tagName.toLowerCase() is 'a'
+      if this isnt (current_nav and current_nav[0])
+        close_menus();
+        current_nav: $(this)
+        current_nav.addClass 'active'
+      false
+
+    $(document.body).click -> close_menus()
+
+    $('.navigation .full_screen').click ->
+      document.body.className: 'full_screen'
+
+    $('.navigation .minimize').click ->
+      document.body.className: 'minimized'
+
+    compile_source()
 
-    var nav = $('.navigation');
-    var currentNav = null;
-    var closeMenus = function() {
-      if (currentNav) currentNav.removeClass('active');
-      currentNav = null;
-    };
-    nav.click(function(e) {
-      if (e.target.tagName.toLowerCase() == 'a') return;
-      if (this !== (currentNav && currentNav[0])) {
-        closeMenus();
-        currentNav = $(this);
-        currentNav.addClass('active');
-      }
-      return false;
-    });
-    $(document.body).click(function() {
-      closeMenus();
-    });
   </script>
 
+  <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js"></script>
+  <script src="extras/coffee-script.js"></script>
+
 </body>
 </html>

documentation/js/aliases.js

@@ -11,4 +11,4 @@
   }
   car.speed < speed_limit ? accelerate() : null;
   print("My name is " + this.name);
-})();
+})();

documentation/js/arguments.js

@@ -5,4 +5,4 @@
     return alert(arguments.reverse());
   };
   backwards("stairway", "to", "heaven");
-})();
+})();

documentation/js/array_comprehensions.js

@@ -1,21 +1,21 @@
 (function(){
-  var _a, _b, _c, _d, _e, _f, _g, food, lunch, roid, roid2;
+  var _a, _b, _c, _d, _e, _f, _g, _h, _i, _j, food, lunch, roid, roid2;
   // Eat lunch.
   lunch = (function() {
     _a = []; _b = ['toast', 'cheese', 'wine'];
-    for (_c = 0; _c < _b.length; _c++) {
+    for (_c = 0, _d = _b.length; _c < _d; _c++) {
       food = _b[_c];
       _a.push(eat(food));
     }
     return _a;
   }).call(this);
   // Naive collision detection.
-  _d = asteroids;
-  for (_e = 0; _e < _d.length; _e++) {
-    roid = _d[_e];
-    _f = asteroids;
-    for (_g = 0; _g < _f.length; _g++) {
-      roid2 = _f[_g];
+  _e = asteroids;
+  for (_f = 0, _g = _e.length; _f < _g; _f++) {
+    roid = _e[_f];
+    _h = asteroids;
+    for (_i = 0, _j = _h.length; _i < _j; _i++) {
+      roid2 = _h[_i];
       if (roid !== roid2) {
         if (roid.overlaps(roid2)) {
           roid.explode();
@@ -23,4 +23,4 @@
       }
     }
   }
-})();
+})();

documentation/js/assignment.js

@@ -2,4 +2,4 @@
   var difficulty, greeting;
   greeting = "Hello CoffeeScript";
   difficulty = 0.5;
-})();
+})();

documentation/js/cake_tasks.js

@@ -1,9 +1,9 @@
 (function(){
   process.mixin(require('assert'));
   task('test', 'run each of the unit tests', function() {
-    var _a, _b, _c, test;
+    var _a, _b, _c, _d, test;
     _a = []; _b = test_files;
-    for (_c = 0; _c < _b.length; _c++) {
+    for (_c = 0, _d = _b.length; _c < _d; _c++) {
       test = _b[_c];
       _a.push(fs.readFile(test, function(err, code) {
         return eval(coffee.compile(code));
@@ -11,4 +11,4 @@
     }
     return _a;
   });
-})();
+})();

documentation/js/classes.js

@@ -1,5 +1,12 @@
 (function(){
-  var Animal, Horse, Snake, _a, _b, sam, tom;
+  var Animal, Horse, Snake, sam, tom;
+  var __extends = function(child, parent) {
+    var ctor = function(){ };
+    ctor.prototype = parent.prototype;
+    child.__superClass__ = parent.prototype;
+    child.prototype = new ctor();
+    child.prototype.constructor = child;
+  };
   Animal = function Animal() {  };
   Animal.prototype.move = function move(meters) {
     return alert(this.name + " moved " + meters + "m.");
@@ -8,11 +15,7 @@
     this.name = name;
     return this;
   };
-  _a = function(){};
-  _a.prototype = Animal.prototype;
-  Snake.__superClass__ = Animal.prototype;
-  Snake.prototype = new _a();
-  Snake.prototype.constructor = Snake;
+  __extends(Snake, Animal);
   Snake.prototype.move = function move() {
     alert("Slithering...");
     return Snake.__superClass__.move.call(this, 5);
@@ -21,11 +24,7 @@
     this.name = name;
     return this;
   };
-  _b = function(){};
-  _b.prototype = Animal.prototype;
-  Horse.__superClass__ = Animal.prototype;
-  Horse.prototype = new _b();
-  Horse.prototype.constructor = Horse;
+  __extends(Horse, Animal);
   Horse.prototype.move = function move() {
     alert("Galloping...");
     return Horse.__superClass__.move.call(this, 45);
@@ -34,4 +33,4 @@
   tom = new Horse("Tommy the Palomino");
   sam.move();
   tom.move();
-})();
+})();

documentation/js/comparisons.js

@@ -2,4 +2,4 @@
   var cholesterol, healthy;
   cholesterol = 127;
   healthy = (200 > cholesterol) && (cholesterol > 60);
-})();
+})();

documentation/js/conditionals.js

@@ -9,4 +9,4 @@
   }
   date = friday ? sue : jill;
   expensive = expensive || do_the_math();
-})();
+})();

documentation/js/embedded.js

@@ -3,4 +3,4 @@
   hi = function() {
   return [document.title, "Hello JavaScript"].join(": ");
 };
-})();
+})();

documentation/js/existence.js

@@ -4,4 +4,4 @@
     solipsism = true;
   }
   speed = (typeof speed !== "undefined" && speed !== null) ? speed : 140;
-})();
+})();

documentation/js/expressions.js

@@ -10,4 +10,4 @@
     }
   };
   eldest = 24 > 21 ? "Liz" : "Ike";
-})();
+})();

documentation/js/expressions_assignment.js

@@ -1,4 +1,4 @@
 (function(){
   var one, six, three, two;
   six = ((one = 1)) + ((two = 2)) + ((three = 3));
-})();
+})();

documentation/js/expressions_comprehension.js

@@ -9,4 +9,4 @@
     }}
     return _a;
   }).call(this).slice(0, 10);
-})();
+})();

documentation/js/expressions_try.js

@@ -6,4 +6,4 @@
       return "And the error is ... " + error;
     }
   }).call(this));
-})();
+})();

documentation/js/fat_arrow.js

@@ -12,4 +12,4 @@
       });
     })(this));
   };
-})();
+})();

documentation/js/functions.js

@@ -6,4 +6,4 @@
   cube = function cube(x) {
     return square(x) * x;
   };
-})();
+})();

documentation/js/heredocs.js

@@ -1,4 +1,4 @@
 (function(){
   var html;
   html = "<strong>\n  cup of coffeescript\n</strong>";
-})();
+})();

documentation/js/interpolation.js

@@ -0,0 +1,5 @@
+(function(){
+  var author, quote;
+  author = "Wittgenstein";
+  quote = "A picture is a fact. -- " + author;
+})();

documentation/js/interpolation_expression.js

@@ -0,0 +1,4 @@
+(function(){
+  var sentence;
+  sentence = (22 / 7) + " is a decent approximation of π";
+})();

documentation/js/multiple_return_values.js

@@ -8,4 +8,4 @@
   city = _a[0];
   temp = _a[1];
   forecast = _a[2];
-})();
+})();

documentation/js/object_comprehensions.js

@@ -14,4 +14,4 @@
     }}
     return _a;
   }).call(this);
-})();
+})();

documentation/js/object_extraction.js

@@ -14,4 +14,4 @@
   _c = _b.address;
   street = _c[0];
   city = _c[1];
-})();
+})();

documentation/js/objects_and_arrays.js

@@ -7,4 +7,4 @@
     tim: 11
   };
   matrix = [1, 0, 1, 0, 0, 1, 1, 1, 0];
-})();
+})();

documentation/js/overview.js

@@ -1,5 +1,5 @@
 (function(){
-  var _a, _b, _c, cubed_list, list, math, num, number, opposite_day, race, square;
+  var _a, _b, _c, _d, cubed_list, list, math, num, number, opposite_day, race, square;
   // Assignment:
   number = 42;
   opposite_day = true;
@@ -34,10 +34,10 @@
   // Array comprehensions:
   cubed_list = (function() {
     _a = []; _b = list;
-    for (_c = 0; _c < _b.length; _c++) {
+    for (_c = 0, _d = _b.length; _c < _d; _c++) {
       num = _b[_c];
       _a.push(math.cube(num));
     }
     return _a;
   }).call(this);
-})();
+})();

documentation/js/parallel_assignment.js

@@ -5,4 +5,4 @@
   _a = [and_switch, bait];
   bait = _a[0];
   and_switch = _a[1];
-})();
+})();

documentation/js/prototypes.js

@@ -0,0 +1,5 @@
+(function(){
+  String.prototype.dasherize = function dasherize() {
+    return this.replace(/_/g, "-");
+  };
+})();

documentation/js/range_comprehensions.js

@@ -2,7 +2,7 @@
   var _a, _b, _c, _d, _e, countdown, egg_delivery, num;
   countdown = (function() {
     _a = []; _d = 10; _e = 1;
-    for (_c = 0, num=_d; (_d <= _e ? num <= _e : num >= _e); (_d <= _e ? num += 1 : num -= 1), _c++) {
+    for (_c = 0, num = _d; (_d <= _e ? num <= _e : num >= _e); (_d <= _e ? num += 1 : num -= 1), _c++) {
       _a.push(num);
     }
     return _a;
@@ -10,7 +10,7 @@
   egg_delivery = function egg_delivery() {
     var _f, _g, _h, _i, _j, dozen_eggs, i;
     _f = []; _i = 0; _j = eggs.length;
-    for (_h = 0, i=_i; (_i <= _j ? i < _j : i > _j); (_i <= _j ? i += 12 : i -= 12), _h++) {
+    for (_h = 0, i = _i; (_i <= _j ? i < _j : i > _j); (_i <= _j ? i += 12 : i -= 12), _h++) {
       _f.push((function() {
         dozen_eggs = eggs.slice(i, i + 12);
         return deliver(new egg_carton(dozen));
@@ -18,4 +18,4 @@
     }
     return _f;
   };
-})();
+})();

documentation/js/scope.js

@@ -7,4 +7,4 @@
     return num = 10;
   };
   new_num = change_numbers();
-})();
+})();

documentation/js/slices.js

@@ -3,4 +3,4 @@
   numbers = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
   three_to_six = numbers.slice(3, 6 + 1);
   numbers_copy = numbers.slice(0, numbers.length);
-})();
+})();

documentation/js/soaks.js

@@ -1,4 +1,4 @@
 (function(){
   var _a;
   (_a = lottery.draw_winner()) == undefined ? undefined : _a.address == undefined ? undefined : _a.address.zipcode;
-})();
+})();

documentation/js/splats.js

@@ -13,4 +13,4 @@
   alert("Gold: " + gold);
   alert("Silver: " + silver);
   alert("The Field: " + the_field);
-})();
+})();

documentation/js/splices.js

@@ -2,4 +2,4 @@
   var numbers;
   numbers = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
   numbers.splice.apply(numbers, [3, 6 - 3 + 1].concat([-3, -4, -5, -6]));
-})();
+})();

documentation/js/strings.js

@@ -6,4 +6,4 @@ or no money in my purse, and nothing particular \
 to interest me on shore, I thought I would sail \
 about a little and see the watery part of the \
 world...";
-})();
+})();

documentation/js/switch.js

@@ -15,4 +15,4 @@
   } else {
     go_to_work();
   }
-})();
+})();

documentation/js/try.js

@@ -7,4 +7,4 @@
   } finally {
     clean_up();
   }
-})();
+})();

documentation/js/while.js

@@ -19,4 +19,4 @@ One fell out and bumped his head.");
     }
     return _a;
   }).call(this);
-})();
+})();

examples/code.coffee

@@ -140,24 +140,28 @@ sed diam nonummy nibh euismod tincidunt ut laoreet dolore magna
 aliquam erat volutpat. Ut wisi enim ad."
 
 # Inheritance and calling super.
-Animal: ->
-Animal::move: (meters) ->
-  alert(this.name + " moved " + meters + "m.")
+class Animal
+  move: (meters) ->
+    alert this.name + " moved " + meters + "m."
 
-Snake: (name) -> this.name: name
-Snake extends Animal
-Snake::move: ->
-  alert('Slithering...')
-  super(5)
+class Snake extends Animal
+  constructor: (name) ->
+    @name: name
 
-Horse: (name) -> this.name: name
-Horse extends Animal
-Horse::move: ->
-  alert('Galloping...')
-  super(45)
+  move: ->
+    alert 'Slithering...'
+    super 5
 
-sam: new Snake("Sammy the Snake")
-tom: new Horse("Tommy the Horse")
+class Horse extends Animal
+  constructor: (name) ->
+    @name: name
+
+  move: ->
+    alert 'Galloping...'
+    super 45
+
+sam: new Snake "Sammy the Snake"
+tom: new Horse "Tommy the Horse"
 
 sam.move()
 tom.move()

examples/computer_science/linked_list.coffee

@@ -1,90 +1,92 @@
 # "Classic" linked list implementation that doesn't keep track of its size.
-LinkedList: ->
-  this._head: null # Pointer to the first item in the list.
+class LinkedList
+
+  constructor: ->
+    this._head: null # Pointer to the first item in the list.
 
 
-# Appends some data to the end of the list. This method traverses the existing
-# list and places the value at the end in a new node.
-LinkedList::add: (data) ->
+  # Appends some data to the end of the list. This method traverses the existing
+  # list and places the value at the end in a new node.
+  add: (data) ->
 
-  # Create a new node object to wrap the data.
-  node: {data: data, next: null}
+    # Create a new node object to wrap the data.
+    node: {data: data, next: null}
 
-  current: this._head ||= node
+    current: this._head ||= node
 
-  if this._head isnt node
-    current: current.next while current.next
-    current.next: node
+    if this._head isnt node
+      current: current.next while current.next
+      current.next: node
 
-  this
+    this
 
 
-# Retrieves the data at the given position in the list.
-LinkedList::item: (index) ->
+  # Retrieves the data at the given position in the list.
+  item: (index) ->
 
-  # Check for out-of-bounds values.
-  return null if index < 0
+    # Check for out-of-bounds values.
+    return null if index < 0
 
-  current: this._head or null
-  i: -1
+    current: this._head or null
+    i: -1
 
-  # Advance through the list.
-  current: current.next while current and index > (i += 1)
+    # Advance through the list.
+    current: current.next while current and index > (i += 1)
 
-  # Return null if we've reached the end.
-  current and current.data
+    # Return null if we've reached the end.
+    current and current.data
 
 
-# Remove the item from the given location in the list.
-LinkedList::remove: (index) ->
+  # Remove the item from the given location in the list.
+  remove: (index) ->
 
-  # Check for out-of-bounds values.
-  return null if index < 0
+    # Check for out-of-bounds values.
+    return null if index < 0
 
-  current: this._head or null
-  i: -1
+    current: this._head or null
+    i: -1
 
-  # Special case: removing the first item.
-  if index is 0
-    this._head: current.next
-  else
+    # Special case: removing the first item.
+    if index is 0
+      this._head: current.next
+    else
 
-    # Find the right location.
-    [previous, current]: [current, current.next] while index > (i += 1)
+      # Find the right location.
+      [previous, current]: [current, current.next] while index > (i += 1)
 
-    # Skip over the item to remove.
-    previous.next: current.next
+      # Skip over the item to remove.
+      previous.next: current.next
 
-  # Return the value.
-  current and current.data
+    # Return the value.
+    current and current.data
 
 
-# Calculate the number of items in the list.
-LinkedList::size: ->
-  current: this._head
-  count:   0
+  # Calculate the number of items in the list.
+  size: ->
+    current: this._head
+    count:   0
 
-  while current
-    count += 1
-    current: current.next
+    while current
+      count += 1
+      current: current.next
 
-  count
+    count
 
 
-# Convert the list into an array.
-LinkedList::toArray: ->
-  result:   []
-  current:  this._head
+  # Convert the list into an array.
+  toArray: ->
+    result:   []
+    current:  this._head
 
-  while current
-    result.push(current.data)
-    current: current.next
+    while current
+      result.push(current.data)
+      current: current.next
 
-  result
+    result
 
 
-# The string representation of the linked list.
-LinkedList::toString: -> this.toArray().toString()
+  # The string representation of the linked list.
+  toString: -> this.toArray().toString()
 
 
 # Tests.

examples/potion.coffee

@@ -53,16 +53,16 @@ for key, val of {dog: 'canine', cat: 'feline', fox: 'vulpine'}
 # Person print = ():
 #   ('My name is ', /name, '.') join print.
 
-Person: ->
-Person::print: ->
-  print('My name is ' + this.name + '.')
+class Person
+  print: ->
+    print 'My name is ' + this.name + '.'
 
 
 # p = Person ()
 # p /name string print
 
 p: new Person()
-print(p.name)
+print p.name
 
 
 # Policeman = Person class (rank): /rank = rank.
@@ -71,12 +71,13 @@ print(p.name)
 #
 # Policeman ('Constable') print
 
-Policeman: (rank) -> this.rank: rank
-Policeman extends Person
-Policeman::print: ->
-  print('My name is ' + this.name + " and I'm a " + this.rank + '.')
+class Policeman extends Person
+  constructor: (rank) ->
+    @rank: rank
+  print: ->
+    print 'My name is ' + this.name + " and I'm a " + this.rank + '.'
 
-print(new Policeman('Constable'))
+print new Policeman 'Constable'
 
 
 # app = [window (width=200, height=400)

examples/underscore.coffee

@@ -18,36 +18,55 @@
   previousUnderscore: root._
 
 
-  # If Underscore is called as a function, it returns a wrapped object that
-  # can be used OO-style. This wrapper holds altered versions of all the
-  # underscore functions. Wrapped objects may be chained.
-  wrapper: (obj) ->
-    this._wrapped: obj
-    this
-
-
   # Establish the object that gets thrown to break out of a loop iteration.
   breaker: if typeof(StopIteration) is 'undefined' then '__break__' else StopIteration
 
 
-  # Create a safe reference to the Underscore object forreference below.
-  _: root._: (obj) -> new wrapper(obj)
+  # Quick regexp-escaping function, because JS doesn't have RegExp.escape().
+  escapeRegExp: (string) -> string.replace(/([.*+?^${}()|[\]\/\\])/g, '\\$1')
+
+
+  # Save bytes in the minified (but not gzipped) version:
+  ArrayProto:           Array.prototype
+  ObjProto:             Object.prototype
+
+
+  #Create quick reference variables for speed access to core prototypes.
+  slice:                ArrayProto.slice
+  unshift:              ArrayProto.unshift
+  toString:             ObjProto.toString
+  hasOwnProperty:       ObjProto.hasOwnProperty
+  propertyIsEnumerable: ObjProto.propertyIsEnumerable
+
+
+  # All ECMA5 native implementations we hope to use are declared here.
+  nativeForEach:        ArrayProto.forEach
+  nativeMap:            ArrayProto.map
+  nativeReduce:         ArrayProto.reduce
+  nativeReduceRight:    ArrayProto.reduceRight
+  nativeFilter:         ArrayProto.filter
+  nativeEvery:          ArrayProto.every
+  nativeSome:           ArrayProto.some
+  nativeIndexOf:        ArrayProto.indexOf
+  nativeLastIndexOf:    ArrayProto.lastIndexOf
+  nativeIsArray:        Array.isArray
+  nativeKeys:           Object.keys
+
+
+  # Create a safe reference to the Underscore object for use below.
+  _: (obj) -> new wrapper(obj)
 
 
   # Export the Underscore object for CommonJS.
   if typeof(exports) != 'undefined' then exports._: _
 
 
-  # Create quick reference variables for speed access to core prototypes.
-  slice:                Array::slice
-  unshift:              Array::unshift
-  toString:             Object::toString
-  hasOwnProperty:       Object::hasOwnProperty
-  propertyIsEnumerable: Object::propertyIsEnumerable
+  # Export Underscore to global scope.
+  root._: _
 
 
   # Current version.
-  _.VERSION: '0.5.8'
+  _.VERSION: '0.6.0'
 
 
   # ------------------------ Collection Functions: ---------------------------
@@ -55,12 +74,13 @@
   # The cornerstone, an each implementation.
   # Handles objects implementing forEach, arrays, and raw objects.
   _.each: (obj, iterator, context) ->
-    index: 0
     try
-      return obj.forEach(iterator, context) if obj.forEach
-      if _.isNumber(obj.length)
-        return iterator.call(context, obj[i], i, obj) for i in [0...obj.length]
-      iterator.call(context, val, key, obj) for key, val of obj
+      if nativeForEach and obj.forEach is nativeForEach
+        obj.forEach iterator, context
+      else if _.isNumber obj.length
+        iterator.call(context, obj[i], i, obj) for i in [0...obj.length]
+      else
+        iterator.call(context, val, key, obj) for key, val of obj
     catch e
       throw e if e isnt breaker
     obj
@@ -69,28 +89,28 @@
   # Return the results of applying the iterator to each element. Use JavaScript
   # 1.6's version of map, if possible.
   _.map: (obj, iterator, context) ->
-    return obj.map(iterator, context) if (obj and _.isFunction(obj.map))
+    return obj.map(iterator, context) if nativeMap and obj.map is nativeMap
     results: []
     _.each obj, (value, index, list) ->
-      results.push(iterator.call(context, value, index, list))
+      results.push iterator.call context, value, index, list
     results
 
 
   # Reduce builds up a single result from a list of values. Also known as
   # inject, or foldl. Uses JavaScript 1.8's version of reduce, if possible.
   _.reduce: (obj, memo, iterator, context) ->
-    return obj.reduce(_.bind(iterator, context), memo) if (obj and _.isFunction(obj.reduce))
+    return obj.reduce(_.bind(iterator, context), memo) if nativeReduce and obj.reduce is nativeReduce
     _.each obj, (value, index, list) ->
-      memo: iterator.call(context, memo, value, index, list)
+      memo: iterator.call context, memo, value, index, list
     memo
 
 
   # The right-associative version of reduce, also known as foldr. Uses
   # JavaScript 1.8's version of reduceRight, if available.
   _.reduceRight: (obj, memo, iterator, context) ->
-    return obj.reduceRight(_.bind(iterator, context), memo) if (obj and _.isFunction(obj.reduceRight))
+    return obj.reduceRight(_.bind(iterator, context), memo) if nativeReduceRight and obj.reduceRight is nativeReduceRight
     _.each _.clone(_.toArray(obj)).reverse(), (value, index) ->
-      memo: iterator.call(context, memo, value, index, obj)
+      memo: iterator.call context, memo, value, index, obj
     memo
 
 
@@ -98,7 +118,7 @@
   _.detect: (obj, iterator, context) ->
     result: null
     _.each obj, (value, index, list) ->
-      if iterator.call(context, value, index, list)
+      if iterator.call context, value, index, list
         result: value
         _.breakLoop()
     result
@@ -106,11 +126,11 @@
 
   # Return all the elements that pass a truth test. Use JavaScript 1.6's
   # filter(), if it exists.
-  _.select: (obj, iterator, context) ->
-    if obj and _.isFunction(obj.filter) then return obj.filter(iterator, context)
+  _.filter: (obj, iterator, context) ->
+    return obj.filter iterator, context if nativeFilter and obj.filter is nativeFilter
     results: []
     _.each obj, (value, index, list) ->
-      results.push(value) if iterator.call(context, value, index, list)
+      results.push value if iterator.call context, value, index, list
     results
 
 
@@ -118,15 +138,15 @@
   _.reject: (obj, iterator, context) ->
     results: []
     _.each obj, (value, index, list) ->
-      results.push(value) if not iterator.call(context, value, index, list)
+      results.push value if not iterator.call context, value, index, list
     results
 
 
   # Determine whether all of the elements match a truth test. Delegate to
   # JavaScript 1.6's every(), if it is present.
-  _.all: (obj, iterator, context) ->
+  _.every: (obj, iterator, context) ->
     iterator ||= _.identity
-    return obj.every(iterator, context) if obj and _.isFunction(obj.every)
+    return obj.every iterator, context if nativeEvery and obj.every is nativeEvery
     result: true
     _.each obj, (value, index, list) ->
       _.breakLoop() unless (result: result and iterator.call(context, value, index, list))
@@ -135,9 +155,9 @@
 
   # Determine if at least one element in the object matches a truth test. Use
   # JavaScript 1.6's some(), if it exists.
-  _.any: (obj, iterator, context) ->
+  _.some: (obj, iterator, context) ->
     iterator ||= _.identity
-    return obj.some(iterator, context) if obj and _.isFunction(obj.some)
+    return obj.some iterator, context if nativeSome and obj.some is nativeSome
     result: false
     _.each obj, (value, index, list) ->
       _.breakLoop() if (result: iterator.call(context, value, index, list))
@@ -147,7 +167,7 @@
   # Determine if a given value is included in the array or object,
   # based on '==='.
   _.include: (obj, target) ->
-    return _.indexOf(obj, target) isnt -1 if obj and _.isFunction(obj.indexOf)
+    return _.indexOf(obj, target) isnt -1 if nativeIndexOf and obj.indexOf is nativeIndexOf
     for key, val of obj
       return true if val is target
     false
@@ -155,13 +175,13 @@
 
   # Invoke a method with arguments on every item in a collection.
   _.invoke: (obj, method) ->
-    args: _.rest(arguments, 2)
+    args: _.rest arguments, 2
     (if method then val[method] else val).apply(val, args) for val in obj
 
 
   # Convenience version of a common use case of map: fetching a property.
   _.pluck: (obj, key) ->
-    _.map(obj, ((val) -> val[key]))
+    _.map(obj, (val) -> val[key])
 
 
   # Return the maximum item or (item-based computation).
@@ -184,7 +204,7 @@
     result.value
 
 
-  # Sort the object's values by a criteria produced by an iterator.
+  # Sort the object's values by a criterion produced by an iterator.
   _.sortBy: (obj, iterator, context) ->
     _.pluck(((_.map obj, (value, index, list) ->
       {value: value, criteria: iterator.call(context, value, index, list)}
@@ -198,7 +218,8 @@
   # be inserted so as to maintain order. Uses binary search.
   _.sortedIndex: (array, obj, iterator) ->
     iterator ||= _.identity
-    low: 0; high: array.length
+    low:  0
+    high: array.length
     while low < high
       mid: (low + high) >> 1
       if iterator(array[mid]) < iterator(obj) then low: mid + 1 else high: mid
@@ -246,30 +267,30 @@
   # Return a completely flattened version of an array.
   _.flatten: (array) ->
     _.reduce array, [], (memo, value) ->
-      return memo.concat(_.flatten(value)) if _.isArray(value)
-      memo.push(value)
+      return memo.concat(_.flatten(value)) if _.isArray value
+      memo.push value
       memo
 
 
   # Return a version of the array that does not contain the specified value(s).
   _.without: (array) ->
-    values: _.rest(arguments)
-    val for val in _.toArray(array) when not _.include(values, val)
+    values: _.rest arguments
+    val for val in _.toArray(array) when not _.include values, val
 
 
   # Produce a duplicate-free version of the array. If the array has already
   # been sorted, you have the option of using a faster algorithm.
   _.uniq: (array, isSorted) ->
     memo: []
-    for el, i in _.toArray(array)
-      memo.push(el) if i is 0 || (if isSorted is true then _.last(memo) isnt el else not _.include(memo, el))
+    for el, i in _.toArray array
+      memo.push el if i is 0 || (if isSorted is true then _.last(memo) isnt el else not _.include(memo, el))
     memo
 
 
   # Produce an array that contains every item shared between all the
   # passed-in arrays.
   _.intersect: (array) ->
-    rest: _.rest(arguments)
+    rest: _.rest arguments
     _.select _.uniq(array), (item) ->
       _.all rest, (other) ->
         _.indexOf(other, item) >= 0
@@ -278,10 +299,10 @@
   # Zip together multiple lists into a single array -- elements that share
   # an index go together.
   _.zip: ->
-    length:     _.max(_.pluck(arguments, 'length'))
-    results:    new Array(length)
+    length:  _.max _.pluck arguments, 'length'
+    results: new Array length
     for i in [0...length]
-      results[i]: _.pluck(arguments, String(i))
+      results[i]: _.pluck arguments, String i
     results
 
 
@@ -289,7 +310,7 @@
   # we need this function. Return the position of the first occurence of an
   # item in an array, or -1 if the item is not included in the array.
   _.indexOf: (array, item) ->
-    return array.indexOf(item) if array.indexOf
+    return array.indexOf item if nativeIndexOf and array.indexOf is nativeIndexOf
     i: 0; l: array.length
     while l - i
       if array[i] is item then return i else i++
@@ -299,7 +320,7 @@
   # Provide JavaScript 1.6's lastIndexOf, delegating to the native function,
   # if possible.
   _.lastIndexOf: (array, item) ->
-    return array.lastIndexOf(item) if array.lastIndexOf
+    return array.lastIndexOf(item) if nativeLastIndexOf and array.lastIndexOf is nativeLastIndexOf
     i: array.length
     while i
       if array[i] is item then return i else i--
@@ -317,7 +338,7 @@
     step:     a[2] or 1
     len:      Math.ceil((stop - start) / step)
     return [] if len <= 0
-    range:    new Array(len)
+    range:    new Array len
     idx:      0
     while true
       return range if (if step > 0 then i - stop else stop - i) >= 0
@@ -331,36 +352,36 @@
   # Create a function bound to a given object (assigning 'this', and arguments,
   # optionally). Binding with arguments is also known as 'curry'.
   _.bind: (func, obj) ->
-    args: _.rest(arguments, 2)
-    -> func.apply(obj or root, args.concat(arguments))
+    args: _.rest arguments, 2
+    -> func.apply obj or root, args.concat arguments
 
 
   # Bind all of an object's methods to that object. Useful for ensuring that
   # all callbacks defined on an object belong to it.
   _.bindAll: (obj) ->
     funcs: if arguments.length > 1 then _.rest(arguments) else _.functions(obj)
-    _.each(funcs, (f) -> obj[f]: _.bind(obj[f], obj))
+    _.each funcs, (f) -> obj[f]: _.bind obj[f], obj
     obj
 
 
   # Delays a function for the given number of milliseconds, and then calls
   # it with the arguments supplied.
   _.delay: (func, wait) ->
-    args: _.rest(arguments, 2)
+    args: _.rest arguments, 2
     setTimeout((-> func.apply(func, args)), wait)
 
 
   # Defers a function, scheduling it to run after the current call stack has
   # cleared.
   _.defer: (func) ->
-    _.delay.apply(_, [func, 1].concat(_.rest(arguments)))
+    _.delay.apply _, [func, 1].concat _.rest arguments
 
 
   # Returns the first function passed as an argument to the second,
   # allowing you to adjust arguments, run code before and after, and
   # conditionally execute the original function.
   _.wrap: (func, wrapper) ->
-    -> wrapper.apply(wrapper, [func].concat(arguments))
+    -> wrapper.apply wrapper, [func].concat arguments
 
 
   # Returns a function that is the composition of a list of functions, each
@@ -377,38 +398,37 @@
   # ------------------------- Object Functions: ----------------------------
 
   # Retrieve the names of an object's properties.
-  _.keys: (obj) ->
-    return _.range(0, obj.length) if _.isArray(obj)
+  _.keys: nativeKeys or (obj) ->
+    return _.range 0, obj.length if _.isArray(obj)
     key for key, val of obj
 
 
   # Retrieve the values of an object's properties.
   _.values: (obj) ->
-    _.map(obj, _.identity)
+    _.map obj, _.identity
 
 
   # Return a sorted list of the function names available in Underscore.
   _.functions: (obj) ->
-    _.select(_.keys(obj), (key) -> _.isFunction(obj[key])).sort()
+    _.filter(_.keys(obj), (key) -> _.isFunction(obj[key])).sort()
 
 
   # Extend a given object with all of the properties in a source object.
   _.extend: (destination, source) ->
-    for key, val of source
-      destination[key]: val
+    (destination[key]: val) for key, val of source
     destination
 
 
   # Create a (shallow-cloned) duplicate of an object.
   _.clone: (obj) ->
-    return obj.slice(0) if _.isArray(obj)
-    _.extend({}, obj)
+    return obj.slice 0 if _.isArray obj
+    _.extend {}, obj
 
 
   # Invokes interceptor with the obj, and then returns obj.
   # The primary purpose of this method is to "tap into" a method chain, in order to perform operations on intermediate results within the chain.
   _.tap: (obj, interceptor) ->
-    interceptor(obj)
+    interceptor obj
     obj
 
 
@@ -444,12 +464,15 @@
     # Different object sizes?
     return false if aKeys.length isnt bKeys.length
     # Recursive comparison of contents.
-    # for (var key in a) if (!_.isEqual(a[key], b[key])) return false;
-    return true
+    (return false) for key, val of a when !_.isEqual(val, b[key])
+    true
 
 
   # Is a given array or object empty?
-  _.isEmpty:      (obj) -> _.keys(obj).length is 0
+  _.isEmpty: (obj) ->
+    return obj.length is 0 if _.isArray obj
+    (return false) for key of obj when hasOwnProperty.call(obj, key)
+    true
 
 
   # Is a given value a DOM element?
@@ -457,7 +480,7 @@
 
 
   # Is a given value an array?
-  _.isArray:      (obj) -> !!(obj and obj.concat and obj.unshift)
+  _.isArray:      nativeIsArray or (obj) -> !!(obj and obj.concat and obj.unshift)
 
 
   # Is a given variable an arguments object?
@@ -477,6 +500,10 @@
   _.isNumber:     (obj) -> (obj is +obj) or toString.call(obj) is '[object Number]'
 
 
+  # Is a given value a boolean?
+  _.isBoolean:    (obj) -> obj is true or obj is false
+
+
   # Is a given value a Date?
   _.isDate:       (obj) -> !!(obj and obj.getTimezoneOffset and obj.setUTCFullYear)
 
@@ -511,10 +538,22 @@
   _.identity: (value) -> value
 
 
+  # Run a function n times.
+  _.times: (n, iterator, context) ->
+    iterator.call(context, i) for i in [0...n]
+
+
   # Break out of the middle of an iteration.
   _.breakLoop: -> throw breaker
 
 
+  # Add your own custom functions to the Underscore object, ensuring that
+  # they're correctly added to the OOP wrapper as well.
+  _.mixin: (obj) ->
+    for name in _.functions(obj)
+      addToWrapper name, _[name]: obj[name]
+
+
   # Generate a unique integer id (unique within the entire client session).
   # Useful for temporary DOM ids.
   idCounter: 0
@@ -536,11 +575,12 @@
   # Single-quote fix from Rick Strahl's version.
   _.template: (str, data) ->
     c: _.templateSettings
+    endMatch: new RegExp("'(?=[^"+c.end.substr(0, 1)+"]*"+escapeRegExp(c.end)+")","g")
     fn: new Function 'obj',
       'var p=[],print=function(){p.push.apply(p,arguments);};' +
       'with(obj){p.push(\'' +
       str.replace(/[\r\t\n]/g, " ")
-         .replace(new RegExp("'(?=[^"+c.end[0]+"]*"+c.end+")","g"),"\t")
+         .replace(endMatch,"\t")
          .split("'").join("\\'")
          .split("\t").join("'")
          .replace(c.interpolate, "',$1,'")
@@ -555,9 +595,9 @@
   _.forEach: _.each
   _.foldl:   _.inject:      _.reduce
   _.foldr:   _.reduceRight
-  _.filter:  _.select
-  _.every:   _.all
-  _.some:    _.any
+  _.select:  _.filter
+  _.all:     _.every
+  _.any:     _.some
   _.head:    _.first
   _.tail:    _.rest
   _.methods: _.functions
@@ -565,17 +605,29 @@
 
   # ------------------------ Setup the OOP Wrapper: --------------------------
 
+  # If Underscore is called as a function, it returns a wrapped object that
+  # can be used OO-style. This wrapper holds altered versions of all the
+  # underscore functions. Wrapped objects may be chained.
+  wrapper: (obj) ->
+    this._wrapped: obj
+    this
+
+
   # Helper function to continue chaining intermediate results.
   result: (obj, chain) ->
     if chain then _(obj).chain() else obj
 
 
-  # Add all of the Underscore functions to the wrapper object.
-  _.each _.functions(_), (name) ->
-    method: _[name]
+  # A method to easily add functions to the OOP wrapper.
+  addToWrapper: (name, func) ->
     wrapper.prototype[name]: ->
-      unshift.call(arguments, this._wrapped)
-      result(method.apply(_, arguments), this._chain)
+      args: _.toArray arguments
+      unshift.call args, this._wrapped
+      result func.apply(_, args), this._chain
+
+
+  # Add all of the Underscore functions to the wrapper object.
+  _.mixin _
 
 
   # Add all mutator Array functions to the wrapper.

examples/web_server.coffee

@@ -3,10 +3,10 @@
 http: require 'http'
 
 server: http.createServer (req, res) ->
-  res.sendHeader 200, {'Content-Type': 'text/plain'}
-  res.sendBody 'Hello, World!'
-  res.finish()
+  res.writeHeader 200, {'Content-Type': 'text/plain'}
+  res.write 'Hello, World!'
+  res.close()
 
 server.listen 3000
 
-puts "Server running at http://localhost:3000/"
+puts "Server running at http://localhost:3000/"

extras/CoffeeScript.tmbundle/CoffeeScript.tmPreferences

@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>name</key>
+	<string>comments</string>
+	<key>scope</key>
+	<string>source.coffee</string>
+	<key>settings</key>
+	<dict>
+		<key>shellVariables</key>
+		<array>
+			<dict>
+				<key>name</key>
+				<string>TM_COMMENT_START</string>
+				<key>value</key>
+				<string># </string>
+			</dict>
+		</array>
+	</dict>
+	<key>uuid</key>
+	<string>0A92C6F6-4D73-4859-B38C-4CC19CBC191F</string>
+</dict>
+</plist>

extras/CoffeeScript.tmbundle/Macros/Overwrite '}' in ${ __ }.tmMacro

@@ -0,0 +1,54 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>commands</key>
+	<array>
+		<dict>
+			<key>command</key>
+			<string>moveRightAndModifySelection:</string>
+		</dict>
+		<dict>
+			<key>argument</key>
+			<dict>
+				<key>action</key>
+				<string>replaceAll</string>
+				<key>findInProjectIgnoreCase</key>
+				<false/>
+				<key>findString</key>
+				<string>((?m:.){2,})|\}|([^}])</string>
+				<key>ignoreCase</key>
+				<false/>
+				<key>regularExpression</key>
+				<true/>
+				<key>replaceAllScope</key>
+				<string>selection</string>
+				<key>replaceString</key>
+				<string>$1}$2</string>
+				<key>wrapAround</key>
+				<false/>
+			</dict>
+			<key>command</key>
+			<string>findWithOptions:</string>
+		</dict>
+		<dict>
+			<key>command</key>
+			<string>moveLeft:</string>
+		</dict>
+		<dict>
+			<key>command</key>
+			<string>moveRight:</string>
+		</dict>
+	</array>
+	<key>keyEquivalent</key>
+	<string>}</string>
+	<key>name</key>
+	<string>Overwrite '}' in ${ .. }</string>
+	<key>scope</key>
+	<string>source.coffee string.quoted.double source.coffee.embedded</string>
+	<key>scopeType</key>
+	<string>local</string>
+	<key>uuid</key>
+	<string>D7ADBF4B-B25B-4CF6-8FC0-C4FB0C3DBE64</string>
+</dict>
+</plist>

extras/CoffeeScript.tmbundle/Snippets/Embedded Code — ${…}.tmSnippet

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>content</key>
+	<string>\${${1:$TM_SELECTED_TEXT}}</string>
+	<key>keyEquivalent</key>
+	<string>$</string>
+	<key>name</key>
+	<string>Embedded Code — ${…}</string>
+	<key>scope</key>
+	<string>string.quoted.double.coffee - string source</string>
+	<key>uuid</key>
+	<string>17C8BFF6-25F2-4F00-8E7E-768D3D186A23</string>
+</dict>
+</plist>

extras/CoffeeScript.tmbundle/Symbol List: Method.tmPreferences

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>name</key>
+	<string>Symbol List: Method</string>
+	<key>scope</key>
+	<string>source.coffee entity.name.type.instance</string>
+	<key>settings</key>
+	<dict>
+		<key>showInSymbolList</key>
+		<integer>0</integer>
+	</dict>
+	<key>uuid</key>
+	<string>B087AF2F-8946-4EA9-8409-49E7C4A2EEF0</string>
+</dict>
+</plist>

extras/CoffeeScript.tmbundle/Syntaxes/CoffeeScript.tmLanguage

@@ -7,19 +7,20 @@
 	<key>fileTypes</key>
 	<array>
 		<string>coffee</string>
+		<string>Cakefile</string>
 	</array>
-	<key>name</key>
-	<string>CoffeeScript</string>
 	<key>foldingStartMarker</key>
 	<string>^.*[:=] \{[^\}]*$</string>
 	<key>foldingStopMarker</key>
 	<string>\s*\}</string>
+	<key>name</key>
+	<string>CoffeeScript</string>
 	<key>patterns</key>
 	<array>
 		<dict>
 			<key>captures</key>
 			<dict>
-			  <key>1</key>
+				<key>1</key>
 				<dict>
 					<key>name</key>
 					<string>variable.parameter.function.coffee</string>
@@ -43,7 +44,7 @@
 			<key>comment</key>
 			<string>match stuff like: a -&gt; … </string>
 			<key>match</key>
-			<string>(\()([a-zA-Z0-9_?.$]*(,\s*[a-zA-Z0-9_?.$]+)*)(\))\s*((=|-)&gt;)</string>
+			<string>(\()([a-zA-Z0-9_?.\$]*(,\s*[a-zA-Z0-9_?.\$]+)*)(\))\s*((=|-)&gt;)</string>
 			<key>name</key>
 			<string>meta.inline.function.coffee</string>
 		</dict>
@@ -66,45 +67,9 @@
 			<key>name</key>
 			<string>meta.class.instance.constructor</string>
 		</dict>
-		<dict>
-			<key>match</key>
-			<string>\b((0(x|X)[0-9a-fA-F]+)|([0-9]+(\.[0-9]+)?(e[+\-]?[0-9]+)?))\b</string>
-			<key>name</key>
-			<string>constant.numeric.coffee</string>
-		</dict>
-		<dict>
-		  <key>match</key>
-		  <string>(@)([a-zA-Z_$]\w*)?</string>
-		  <key>name</key>
-		  <string>variable.other.readwrite.instance.coffee</string>
-		</dict>
-    <dict>
-      <key>name</key>
-      <string>string.quoted.heredoc.coffee</string>
-      <key>begin</key>
-      <string>("""|''')</string>
-      <key>end</key>
-      <string>("""|''')</string>
-      <key>beginCaptures</key>
-      <dict>
-				<key>0</key>
-				<dict>
-					<key>name</key>
-					<string>punctuation.definition.string.begin.coffee</string>
-				</dict>
-			</dict>
-      <key>endCaptures</key>
-      <dict>
-				<key>0</key>
-				<dict>
-					<key>name</key>
-					<string>punctuation.definition.string.end.coffee</string>
-				</dict>
-			</dict>
-    </dict>
 		<dict>
 			<key>begin</key>
-			<string>'</string>
+			<string>("""|''')</string>
 			<key>beginCaptures</key>
 			<dict>
 				<key>0</key>
@@ -114,7 +79,7 @@
 				</dict>
 			</dict>
 			<key>end</key>
-			<string>'</string>
+			<string>("""|''')</string>
 			<key>endCaptures</key>
 			<dict>
 				<key>0</key>
@@ -124,49 +89,7 @@
 				</dict>
 			</dict>
 			<key>name</key>
-			<string>string.quoted.single.coffee</string>
-			<key>patterns</key>
-			<array>
-				<dict>
-					<key>match</key>
-					<string>\\(x\h{2}|[0-2][0-7]{,2}|3[0-6][0-7]?|37[0-7]?|[4-7][0-7]?|.)</string>
-					<key>name</key>
-					<string>constant.character.escape.coffee</string>
-				</dict>
-			</array>
-		</dict>
-		<dict>
-			<key>begin</key>
-			<string>"</string>
-			<key>beginCaptures</key>
-			<dict>
-				<key>0</key>
-				<dict>
-					<key>name</key>
-					<string>punctuation.definition.string.begin.coffee</string>
-				</dict>
-			</dict>
-			<key>end</key>
-			<string>"</string>
-			<key>endCaptures</key>
-			<dict>
-				<key>0</key>
-				<dict>
-					<key>name</key>
-					<string>punctuation.definition.string.end.coffee</string>
-				</dict>
-			</dict>
-			<key>name</key>
-			<string>string.quoted.double.coffee</string>
-			<key>patterns</key>
-			<array>
-				<dict>
-					<key>match</key>
-					<string>\\(x\h{2}|[0-2][0-7]{,2}|3[0-6][0-7]|37[0-7]?|[4-7][0-7]?|.)</string>
-					<key>name</key>
-					<string>constant.character.escape.coffee</string>
-				</dict>
-			</array>
+			<string>string.quoted.heredoc.coffee</string>
 		</dict>
 		<dict>
 			<key>begin</key>
@@ -255,10 +178,67 @@
 			<string>keyword.control.coffee</string>
 		</dict>
 		<dict>
+			<key>captures</key>
+			<dict>
+				<key>1</key>
+				<dict>
+					<key>name</key>
+					<string>variable.assignment.coffee</string>
+				</dict>
+			</dict>
 			<key>match</key>
-			<string>\b([a-zA-Z$_](\w|\$|:|\.)*\s*(?=\:))</string>
+			<string>(?=[a-zA-Z\$_])([a-zA-Z\$_](\w|\$|\.)*\s*(?=(?!\::)\:(?!(\s*\(.*\))?\s*((=|-)&gt;))))</string>
 			<key>name</key>
 			<string>variable.assignment.coffee</string>
+		</dict>
+		<dict>
+			<key>begin</key>
+			<string>(\[)(?=.*?\]\s*:)</string>
+			<key>beginCaptures</key>
+			<dict>
+				<key>0</key>
+				<dict>
+					<key>name</key>
+					<string>keyword.operator.coffee</string>
+				</dict>
+			</dict>
+			<key>end</key>
+			<string>(\]\s*:)</string>
+			<key>endCaptures</key>
+			<dict>
+				<key>0</key>
+				<dict>
+					<key>name</key>
+					<string>keyword.operator.coffee</string>
+				</dict>
+			</dict>
+			<key>name</key>
+			<string>meta.variable.assignment.destructured.coffee</string>
+			<key>patterns</key>
+			<array>
+				<dict>
+					<key>include</key>
+					<string>#variable_name</string>
+				</dict>
+				<dict>
+					<key>include</key>
+					<string>#instance_variable</string>
+				</dict>
+				<dict>
+					<key>include</key>
+					<string>#single_quoted_string</string>
+				</dict>
+				<dict>
+					<key>include</key>
+					<string>#double_quoted_string</string>
+				</dict>
+				<dict>
+					<key>include</key>
+					<string>#numeric</string>
+				</dict>
+			</array>
+		</dict>
+		<dict>
 			<key>captures</key>
 			<dict>
 				<key>1</key>
@@ -267,6 +247,16 @@
 					<string>entity.name.function.coffee</string>
 				</dict>
 			</dict>
+			<key>match</key>
+			<string>(?=[a-zA-Z\$_])([a-zA-Z\$_](\w|\$|:|\.)*\s*(?=\:(\s*\(.*\))?\s*((=|-)&gt;)))</string>
+			<key>name</key>
+			<string>meta.function.coffee</string>
+		</dict>
+		<dict>
+			<key>match</key>
+			<string>(=|-)&gt;</string>
+			<key>name</key>
+			<string>storage.type.function.coffee</string>
 		</dict>
 		<dict>
 			<key>match</key>
@@ -292,18 +282,41 @@
 			<key>name</key>
 			<string>variable.language.coffee</string>
 		</dict>
+		<dict>
+			<key>captures</key>
+			<dict>
+				<key>1</key>
+				<dict>
+					<key>name</key>
+					<string>storage.type.class.coffee</string>
+				</dict>
+				<key>2</key>
+				<dict>
+					<key>name</key>
+					<string>entity.name.type.class.coffee</string>
+				</dict>
+				<key>3</key>
+				<dict>
+					<key>name</key>
+					<string>entity.other.inherited-class.coffee</string>
+				</dict>
+				<key>4</key>
+				<dict>
+					<key>name</key>
+					<string>keyword.control.inheritance.coffee</string>
+				</dict>
+			</dict>
+			<key>match</key>
+			<string>(class)\s+([a-zA-Z\$_]\w+)(\s+(extends)\s+[a-zA-Z\$_]\w*)?</string>
+			<key>name</key>
+			<string>meta.class.coffee</string>
+		</dict>
 		<dict>
 			<key>match</key>
 			<string>\b(debugger|\\)\b</string>
 			<key>name</key>
 			<string>keyword.other.coffee</string>
 		</dict>
-		<dict>
-			<key>match</key>
-			<string>(=|-)&gt;</string>
-			<key>name</key>
-			<string>storage.type.function.coffee</string>
-		</dict>
 		<dict>
 			<key>match</key>
 			<string>!|%|&amp;|\*|\/|\-\-|\-|\+\+|\+|~|===|==|=|!=|!==|&lt;=|&gt;=|&lt;&lt;=|&gt;&gt;=|&gt;&gt;&gt;=|&lt;&gt;|&lt;|&gt;|!|&amp;&amp;|\?|\|\||\:|\*=|(?&lt;!\()/=|%=|\+=|\-=|&amp;=|\^=|\b(instanceof|new|delete|typeof|and|or|is|isnt|not)\b</string>
@@ -348,11 +361,213 @@
 		</dict>
 		<dict>
 			<key>match</key>
-			<string>\[|\]</string>
+			<string>\[|\]\s*</string>
 			<key>name</key>
 			<string>meta.brace.square.coffee</string>
 		</dict>
+		<dict>
+			<key>include</key>
+			<string>#instance_variable</string>
+		</dict>
+		<dict>
+			<key>include</key>
+			<string>#single_quoted_string</string>
+		</dict>
+		<dict>
+			<key>include</key>
+			<string>#double_quoted_string</string>
+		</dict>
+		<dict>
+			<key>include</key>
+			<string>#numeric</string>
+		</dict>
 	</array>
+	<key>repository</key>
+	<dict>
+		<key>double_quoted_string</key>
+		<dict>
+			<key>patterns</key>
+			<array>
+				<dict>
+					<key>begin</key>
+					<string>"</string>
+					<key>beginCaptures</key>
+					<dict>
+						<key>0</key>
+						<dict>
+							<key>name</key>
+							<string>punctuation.definition.string.begin.coffee</string>
+						</dict>
+					</dict>
+					<key>end</key>
+					<string>"</string>
+					<key>endCaptures</key>
+					<dict>
+						<key>0</key>
+						<dict>
+							<key>name</key>
+							<string>punctuation.definition.string.end.coffee</string>
+						</dict>
+					</dict>
+					<key>name</key>
+					<string>string.quoted.double.coffee</string>
+					<key>patterns</key>
+					<array>
+						<dict>
+							<key>match</key>
+							<string>\\(x\h{2}|[0-2][0-7]{,2}|3[0-6][0-7]|37[0-7]?|[4-7][0-7]?|.)</string>
+							<key>name</key>
+							<string>constant.character.escape.coffee</string>
+						</dict>
+						<dict>
+							<key>include</key>
+							<string>#interpolated_coffee</string>
+						</dict>
+					</array>
+				</dict>
+			</array>
+		</dict>
+		<key>instance_variable</key>
+		<dict>
+			<key>patterns</key>
+			<array>
+				<dict>
+					<key>match</key>
+					<string>(@)([a-zA-Z_\$]\w*)?</string>
+					<key>name</key>
+					<string>variable.other.readwrite.instance.coffee</string>
+				</dict>
+			</array>
+		</dict>
+		<key>interpolated_coffee</key>
+		<dict>
+			<key>patterns</key>
+			<array>
+				<dict>
+					<key>begin</key>
+					<string>\$\{</string>
+					<key>captures</key>
+					<dict>
+						<key>0</key>
+						<dict>
+							<key>name</key>
+							<string>punctuation.section.embedded.coffee</string>
+						</dict>
+					</dict>
+					<key>end</key>
+					<string>\}</string>
+					<key>name</key>
+					<string>source.coffee.embedded.source</string>
+					<key>patterns</key>
+					<array>
+						<dict>
+							<key>include</key>
+							<string>$self</string>
+						</dict>
+					</array>
+				</dict>
+				<dict>
+					<key>captures</key>
+					<dict>
+						<key>1</key>
+						<dict>
+							<key>name</key>
+							<string>punctuation.definition.variable.coffee</string>
+						</dict>
+					</dict>
+					<key>match</key>
+					<string>(\$)@[a-zA-Z_]\w*(\.\w+)*</string>
+					<key>name</key>
+					<string>variable.other.readwrite.coffee</string>
+				</dict>
+				<dict>
+					<key>captures</key>
+					<dict>
+						<key>1</key>
+						<dict>
+							<key>name</key>
+							<string>punctuation.definition.variable.coffee</string>
+						</dict>
+					</dict>
+					<key>match</key>
+					<string>(\$)(?!@)[a-zA-Z_]\w*(\.\w+)*</string>
+					<key>name</key>
+					<string>source.coffee.embedded.source</string>
+				</dict>
+			</array>
+		</dict>
+		<key>numeric</key>
+		<dict>
+			<key>patterns</key>
+			<array>
+				<dict>
+					<key>match</key>
+					<string>(?&lt;!\$)\b((0(x|X)[0-9a-fA-F]+)|([0-9]+(\.[0-9]+)?(e[+\-]?[0-9]+)?))\b</string>
+					<key>name</key>
+					<string>constant.numeric.coffee</string>
+				</dict>
+			</array>
+		</dict>
+		<key>single_quoted_string</key>
+		<dict>
+			<key>patterns</key>
+			<array>
+				<dict>
+					<key>begin</key>
+					<string>'</string>
+					<key>beginCaptures</key>
+					<dict>
+						<key>0</key>
+						<dict>
+							<key>name</key>
+							<string>punctuation.definition.string.begin.coffee</string>
+						</dict>
+					</dict>
+					<key>end</key>
+					<string>'</string>
+					<key>endCaptures</key>
+					<dict>
+						<key>0</key>
+						<dict>
+							<key>name</key>
+							<string>punctuation.definition.string.end.coffee</string>
+						</dict>
+					</dict>
+					<key>name</key>
+					<string>string.quoted.single.coffee</string>
+					<key>patterns</key>
+					<array>
+						<dict>
+							<key>match</key>
+							<string>\\(x\h{2}|[0-2][0-7]{,2}|3[0-6][0-7]?|37[0-7]?|[4-7][0-7]?|.)</string>
+							<key>name</key>
+							<string>constant.character.escape.coffee</string>
+						</dict>
+					</array>
+				</dict>
+			</array>
+		</dict>
+		<key>variable_name</key>
+		<dict>
+			<key>patterns</key>
+			<array>
+				<dict>
+					<key>captures</key>
+					<dict>
+						<key>1</key>
+						<dict>
+							<key>name</key>
+							<string>variable.assignment.coffee</string>
+						</dict>
+					</dict>
+					<key>match</key>
+					<string>([a-zA-Z\$_]\w*(\.\w+)*)</string>
+					<key>name</key>
+					<string>variable.assignment.coffee</string>
+				</dict>
+			</array>
+		</dict>
+	</dict>
 	<key>scopeName</key>
 	<string>source.coffee</string>
 	<key>uuid</key>

extras/EXTRAS

@@ -1,4 +1,12 @@
-This folder includes rough cuts of CoffeeScript syntax highlighters for 
+EXTRAS:
+
+"extras/coffee-script.js" is a concatenated and compressed version of the 
+CoffeeScript compiler. To use it in the browser, include the script after any 
+inline script tags of type "text/coffeescript" on the page. It will compile
+and evaluate all of the scripts in order.
+
+
+This folder also includes rough cuts of CoffeeScript syntax highlighters for 
 TextMate and Vim. Improvements to their lexing ability are always welcome.
 
 To install the TextMate bundle, drop it into:

lib/bin/cake

@@ -1,7 +0,0 @@
-#!/usr/bin/env node
-
-process.mixin(require('sys'));
-
-require.paths.unshift('/usr/local/lib/coffee-script/lib');
-
-require('cake').run();

lib/bin/coffee

@@ -1,7 +0,0 @@
-#!/usr/bin/env node
-
-process.mixin(require('sys'));
-
-require.paths.unshift('/usr/local/lib/coffee-script/lib');
-
-require('command_line').run();

lib/cake.js

@@ -1,18 +1,26 @@
 (function(){
-  var coffee, fs, no_such_task, path, print_tasks, tasks;
+  var CoffeeScript, fs, no_such_task, oparse, options, optparse, path, print_tasks, switches, tasks;
   var __hasProp = Object.prototype.hasOwnProperty;
-  // `cake` is a simplified version of Make (Rake, Jake) for CoffeeScript.
+  // `cake` is a simplified version of [Make](http://www.gnu.org/software/make/)
+  // ([Rake](http://rake.rubyforge.org/), [Jake](http://github.com/280north/jake))
+  // for CoffeeScript. You define tasks with names and descriptions in a Cakefile,
+  // and can call them from the command line, or invoke them from other tasks.
+  // Running `cake` with no arguments will print out a list of all the tasks in the
+  // current directory's Cakefile.
+  // External dependencies.
   fs = require('fs');
   path = require('path');
-  coffee = require('coffee-script');
+  optparse = require('optparse');
+  CoffeeScript = require('coffee-script');
+  // Keep track of the list of defined tasks, the accepted options, and so on.
   tasks = {};
-  no_such_task = function no_such_task(task) {
-    process.stdio.writeError('No such task: "' + task + '"\n');
-    return process.exit(1);
-  };
-  // Mixin the Cake functionality.
+  options = {};
+  switches = [];
+  oparse = null;
+  // Mixin the top-level Cake functions for Cakefiles to use directly.
   process.mixin({
-    // Define a task with a name, a description, and the action itself.
+    // Define a Cake task with a short name, a sentence description,
+    // and the function to run as the action itself.
     task: function task(name, description, action) {
       return tasks[name] = {
         name: name,
@@ -20,61 +28,70 @@
         action: action
       };
     },
-    // Invoke another task in the Cakefile.
+    // Define an option that the Cakefile accepts. The parsed options hash,
+    // containing all of the command-line options passed, will be made available
+    // as the first argument to the action.
+    option: function option(letter, flag, description) {
+      return switches.push([letter, flag, description]);
+    },
+    // Invoke another task in the current Cakefile.
     invoke: function invoke(name) {
       if (!(tasks[name])) {
         no_such_task(name);
       }
-      return tasks[name].action();
+      return tasks[name].action(options);
     }
   });
-  // Display the list of Cake tasks.
-  print_tasks = function print_tasks() {
-    var _a, _b, _c, _d, _e, _f, _g, i, name, spaces, task;
-    _a = []; _b = tasks;
-    for (name in _b) { if (__hasProp.call(_b, name)) {
-      task = _b[name];
-      _a.push((function() {
-        spaces = 20 - name.length;
-        spaces = spaces > 0 ? (function() {
-          _c = []; _f = 0; _g = spaces;
-          for (_e = 0, i=_f; (_f <= _g ? i <= _g : i >= _g); (_f <= _g ? i += 1 : i -= 1), _e++) {
-            _c.push(' ');
-          }
-          return _c;
-        }).call(this).join('') : '';
-        return puts("cake " + name + spaces + ' # ' + task.description);
-      }).call(this));
-    }}
-    return _a;
-  };
-  // Running `cake` runs the tasks you pass asynchronously (node-style), or
-  // prints them out, with no arguments.
+  // Run `cake`. Executes all of the tasks you pass, in order. Note that Node's
+  // asynchrony may cause tasks to execute in a different order than you'd expect.
+  // If no tasks are passed, print the help screen.
   exports.run = function run() {
     return path.exists('Cakefile', function(exists) {
-      var args;
+      var _a, _b, _c, _d, arg, args;
       if (!(exists)) {
-        throw new Error('Cakefile not found in ' + process.cwd());
+        throw new Error("Cakefile not found in " + (process.cwd()));
       }
-      args = process.ARGV.slice(2, process.ARGV.length);
-      return fs.readFile('Cakefile', function(err, source) {
-        var _a, _b, _c, arg;
-        eval(coffee.compile(source));
-        if (!(args.length)) {
-          return print_tasks();
-        }
-        _a = []; _b = args;
-        for (_c = 0; _c < _b.length; _c++) {
-          arg = _b[_c];
-          _a.push((function() {
-            if (!(tasks[arg])) {
-              no_such_task(arg);
-            }
-            return tasks[arg].action();
-          }).call(this));
-        }
-        return _a;
+      args = process.argv.slice(2, process.argv.length);
+      CoffeeScript.run(fs.readFileSync('Cakefile'), {
+        source: 'Cakefile'
       });
+      oparse = new optparse.OptionParser(switches);
+      if (!(args.length)) {
+        return print_tasks();
+      }
+      options = oparse.parse(args);
+      _a = []; _b = options.arguments;
+      for (_c = 0, _d = _b.length; _c < _d; _c++) {
+        arg = _b[_c];
+        _a.push(invoke(arg));
+      }
+      return _a;
     });
   };
-})();
+  // Display the list of Cake tasks in a format similar to `rake -T`
+  print_tasks = function print_tasks() {
+    var _a, _b, _c, _d, _e, _f, i, name, spaces, task;
+    puts('');
+    _a = tasks;
+    for (name in _a) { if (__hasProp.call(_a, name)) {
+      task = _a[name];
+      spaces = 20 - name.length;
+      spaces = spaces > 0 ? (function() {
+        _b = []; _e = 0; _f = spaces;
+        for (_d = 0, i = _e; (_e <= _f ? i <= _f : i >= _f); (_e <= _f ? i += 1 : i -= 1), _d++) {
+          _b.push(' ');
+        }
+        return _b;
+      }).call(this).join('') : '';
+      puts("cake " + name + spaces + " # " + (task.description));
+    }}
+    if (switches.length) {
+      return puts(oparse.help());
+    }
+  };
+  // Print an error and exit when attempting to all an undefined task.
+  no_such_task = function no_such_task(task) {
+    process.stdio.writeError("No such task: \"" + task + "\"\n");
+    return process.exit(1);
+  };
+})();

lib/coffee-script.js

@@ -1,6 +1,12 @@
 (function(){
-  var lexer, parser, path;
-  // Set up for both the browser and the server.
+  var lexer, parser, path, process_scripts;
+  // CoffeeScript can be used both on the server, as a command-line compiler based
+  // on Node.js/V8, or to run CoffeeScripts directly in the browser. This module
+  // contains the main entry functions for tokenzing, parsing, and compiling source
+  // CoffeeScript into JavaScript.
+  // If included on a webpage, it will automatically sniff out, compile, and
+  // execute all scripts present in `text/coffeescript` tags.
+  // Set up dependencies correctly for both the server and the browser.
   if ((typeof process !== "undefined" && process !== null)) {
     process.mixin(require('nodes'));
     path = require('path');
@@ -11,7 +17,41 @@
     parser = exports.parser;
     this.exports = (this.CoffeeScript = {});
   }
-  // Thin wrapper for Jison compatibility around the real lexer.
+  // The current CoffeeScript version number.
+  exports.VERSION = '0.5.5';
+  // Compile a string of CoffeeScript code to JavaScript, using the Coffee/Jison
+  // compiler.
+  exports.compile = function compile(code, options) {
+    try {
+      return (parser.parse(lexer.tokenize(code))).compile(options);
+    } catch (err) {
+      if (options.source) {
+        err.message = "In " + (options.source) + ", " + (err.message);
+      }
+      throw err;
+    }
+  };
+  // Tokenize a string of CoffeeScript code, and return the array of tokens.
+  exports.tokens = function tokens(code) {
+    return lexer.tokenize(code);
+  };
+  // Tokenize and parse a string of CoffeeScript code, and return the AST. You can
+  // then compile it by calling `.compile()` on the root, or traverse it by using
+  // `.traverse()` with a callback.
+  exports.nodes = function nodes(code) {
+    return parser.parse(lexer.tokenize(code));
+  };
+  // Compile and execute a string of CoffeeScript (on the server), correctly
+  // setting `__filename`, `__dirname`, and relative `require()`.
+  exports.run = function run(code, options) {
+    var __dirname, __filename;
+    module.filename = (__filename = options.source);
+    __dirname = path.dirname(__filename);
+    return eval(exports.compile(code, options));
+  };
+  // The real Lexer produces a generic stream of tokens. This object provides a
+  // thin wrapper around it, compatible with the Jison API. We can then pass it
+  // directly as a "Jison lexer".
   parser.lexer = {
     lex: function lex() {
       var token;
@@ -32,30 +72,26 @@
       return this.pos;
     }
   };
-  exports.VERSION = '0.5.1';
-  // Compile CoffeeScript to JavaScript, using the Coffee/Jison compiler.
-  exports.compile = function compile(code, options) {
-    return (parser.parse(lexer.tokenize(code))).compile(options);
-  };
-  // Just the tokens.
-  exports.tokenize = function tokenize(code) {
-    return lexer.tokenize(code);
-  };
-  // Just the nodes.
-  exports.tree = function tree(code) {
-    return parser.parse(lexer.tokenize(code));
-  };
-  // Pretty-print a token stream.
-  exports.print_tokens = function print_tokens(tokens) {
-    var _a, _b, _c, strings, token;
-    strings = (function() {
-      _a = []; _b = tokens;
-      for (_c = 0; _c < _b.length; _c++) {
-        token = _b[_c];
-        _a.push('[' + token[0] + ' ' + token[1].toString().replace(/\n/, '\\n') + ']');
+  // Activate CoffeeScript in the browser by having it compile and evaluate
+  // all script tags with a content-type of `text/coffeescript`. This happens
+  // on page load. Unfortunately, the text contents of remote scripts cannot be
+  // accessed from the browser, so only inline script tags will work.
+  if ((typeof document !== "undefined" && document !== null) && document.getElementsByTagName) {
+    process_scripts = function process_scripts() {
+      var _a, _b, _c, _d, tag;
+      _a = []; _b = document.getElementsByTagName('script');
+      for (_c = 0, _d = _b.length; _c < _d; _c++) {
+        tag = _b[_c];
+        if (tag.type === 'text/coffeescript') {
+          _a.push(eval(exports.compile(tag.innerHTML)));
+        }
       }
       return _a;
-    }).call(this);
-    return puts(strings.join(' '));
-  };
-})();
+    };
+    if (window.addEventListener) {
+      window.addEventListener('load', process_scripts, false);
+    } else if (window.attachEvent) {
+      window.attachEvent('onload', process_scripts);
+    }
+  }
+})();

lib/command.js

@@ -0,0 +1,226 @@
+(function(){
+  var BANNER, CoffeeScript, SWITCHES, compile_options, compile_script, compile_scripts, compile_stdio, fs, lint, option_parser, options, optparse, parse_options, path, print_tokens, sources, usage, version, watch_scripts, write_js;
+  // The `coffee` utility. Handles command-line compilation of CoffeeScript
+  // into various forms: saved into `.js` files or printed to stdout, piped to
+  // [JSLint](http://javascriptlint.com/) or recompiled every time the source is
+  // saved, printed as a token stream or as the syntax tree, or launch an
+  // interactive REPL.
+  // External dependencies.
+  fs = require('fs');
+  path = require('path');
+  optparse = require('optparse');
+  CoffeeScript = require('coffee-script');
+  // The help banner that is printed when `coffee` is called without arguments.
+  BANNER = "coffee compiles CoffeeScript source files into JavaScript.\n\nUsage:\n  coffee path/to/script.coffee";
+  // The list of all the valid option flags that `coffee` knows how to handle.
+  SWITCHES = [['-c', '--compile', 'compile to JavaScript and save as .js files'], ['-i', '--interactive', 'run an interactive CoffeeScript REPL'], ['-o', '--output [DIR]', 'set the directory for compiled JavaScript'], ['-w', '--watch', 'watch scripts for changes, and recompile'], ['-p', '--print', 'print the compiled JavaScript to stdout'], ['-l', '--lint', 'pipe the compiled JavaScript through JSLint'], ['-s', '--stdio', 'listen for and compile scripts over stdio'], ['-e', '--eval', 'compile a string from the command line'], ['--no-wrap', 'compile without the top-level function wrapper'], ['-t', '--tokens', 'print the tokens that the lexer produces'], ['-n', '--nodes', 'print the parse tree that Jison produces'], ['-v', '--version', 'display CoffeeScript version'], ['-h', '--help', 'display this help message']];
+  // Top-level objects shared by all the functions.
+  options = {};
+  sources = [];
+  option_parser = null;
+  // Run `coffee` by parsing passed options and determining what action to take.
+  // Many flags cause us to divert before compiling anything. Flags passed after
+  // `--` will be passed verbatim to your script as arguments in `process.argv`
+  exports.run = function run() {
+    var flags, separator;
+    parse_options();
+    if (options.help) {
+      return usage();
+    }
+    if (options.version) {
+      return version();
+    }
+    if (options.interactive) {
+      return require('repl');
+    }
+    if (options.stdio) {
+      return compile_stdio();
+    }
+    if (options.eval) {
+      return compile_script('console', sources[0]);
+    }
+    if (!(sources.length)) {
+      return usage();
+    }
+    separator = sources.indexOf('--');
+    flags = [];
+    if (separator >= 0) {
+      flags = sources.slice((separator + 1), sources.length);
+      sources = sources.slice(0, separator);
+    }
+    process.ARGV = (process.argv = flags);
+    if (options.watch) {
+      watch_scripts();
+    }
+    return compile_scripts();
+  };
+  // Asynchronously read in each CoffeeScript in a list of source files and
+  // compile them.
+  compile_scripts = function compile_scripts() {
+    var _a, _b, _c, _d, compile, source;
+    compile = function compile(source) {
+      return path.exists(source, function(exists) {
+        if (!(exists)) {
+          throw new Error("File not found: " + source);
+        }
+        return fs.readFile(source, function(err, code) {
+          return compile_script(source, code);
+        });
+      });
+    };
+    _a = []; _b = sources;
+    for (_c = 0, _d = _b.length; _c < _d; _c++) {
+      source = _b[_c];
+      _a.push(compile(source));
+    }
+    return _a;
+  };
+  // Compile a single source script, containing the given code, according to the
+  // requested options. Both compile_scripts and watch_scripts share this method
+  // in common. If evaluating the script directly sets `__filename`, `__dirname`
+  // and `module.filename` to be correct relative to the script's path.
+  compile_script = function compile_script(source, code) {
+    var code_opts, js, o;
+    o = options;
+    code_opts = compile_options(source);
+    try {
+      if (o.tokens) {
+        return print_tokens(CoffeeScript.tokens(code));
+      } else if (o.nodes) {
+        return puts(CoffeeScript.nodes(code).toString());
+      } else if (o.run) {
+        return CoffeeScript.run(code, code_opts);
+      } else {
+        js = CoffeeScript.compile(code, code_opts);
+        if (o.print) {
+          return process.stdio.write(js);
+        } else if (o.compile) {
+          return write_js(source, js);
+        } else if (o.lint) {
+          return lint(js);
+        }
+      }
+    } catch (err) {
+      if (o.watch) {
+        return puts(err.message);
+      } else {
+        throw err;
+      }
+    }
+  };
+  // Attach the appropriate listeners to compile scripts incoming over **stdin**,
+  // and write them back to **stdout**.
+  compile_stdio = function compile_stdio() {
+    var code;
+    code = '';
+    process.stdio.open();
+    process.stdio.addListener('data', function(string) {
+      if (string) {
+        return code += string;
+      }
+    });
+    return process.stdio.addListener('close', function() {
+      return compile_script('stdio', code);
+    });
+  };
+  // Watch a list of source CoffeeScript files using `fs.watchFile`, recompiling
+  // them every time the files are updated. May be used in combination with other
+  // options, such as `--lint` or `--print`.
+  watch_scripts = function watch_scripts() {
+    var _a, _b, _c, _d, source, watch;
+    watch = function watch(source) {
+      return fs.watchFile(source, {
+        persistent: true,
+        interval: 500
+      }, function(curr, prev) {
+        if (curr.mtime.getTime() === prev.mtime.getTime()) {
+          return null;
+        }
+        return fs.readFile(source, function(err, code) {
+          return compile_script(source, code);
+        });
+      });
+    };
+    _a = []; _b = sources;
+    for (_c = 0, _d = _b.length; _c < _d; _c++) {
+      source = _b[_c];
+      _a.push(watch(source));
+    }
+    return _a;
+  };
+  // Write out a JavaScript source file with the compiled code. By default, files
+  // are written out in `cwd` as `.js` files with the same name, but the output
+  // directory can be customized with `--output`.
+  write_js = function write_js(source, js) {
+    var dir, filename, js_path;
+    filename = path.basename(source, path.extname(source)) + '.js';
+    dir = options.output || path.dirname(source);
+    js_path = path.join(dir, filename);
+    return fs.writeFile(js_path, js);
+  };
+  // Pipe compiled JS through JSLint (requires a working `jsl` command), printing
+  // any errors or warnings that arise.
+  lint = function lint(js) {
+    var jsl;
+    jsl = process.createChildProcess('jsl', ['-nologo', '-stdin']);
+    jsl.addListener('output', function(result) {
+      if (result) {
+        return puts(result.replace(/\n/g, ''));
+      }
+    });
+    jsl.addListener('error', function(result) {
+      if (result) {
+        return puts(result);
+      }
+    });
+    jsl.write(js);
+    return jsl.close();
+  };
+  // Pretty-print a stream of tokens.
+  print_tokens = function print_tokens(tokens) {
+    var _a, _b, _c, _d, _e, strings, tag, token, value;
+    strings = (function() {
+      _a = []; _b = tokens;
+      for (_c = 0, _d = _b.length; _c < _d; _c++) {
+        token = _b[_c];
+        _a.push((function() {
+          _e = [token[0], token[1].toString().replace(/\n/, '\\n')];
+          tag = _e[0];
+          value = _e[1];
+          return "[" + tag + " " + value + "]";
+        }).call(this));
+      }
+      return _a;
+    }).call(this);
+    return puts(strings.join(' '));
+  };
+  // Use the [OptionParser module](optparse.html) to extract all options from
+  // `process.argv` that are specified in `SWITCHES`.
+  parse_options = function parse_options() {
+    var o;
+    option_parser = new optparse.OptionParser(SWITCHES, BANNER);
+    o = (options = option_parser.parse(process.argv));
+    options.run = !(o.compile || o.print || o.lint);
+    options.print = !!(o.print || (o.eval || o.stdio && o.compile));
+    return sources = options.arguments.slice(2, options.arguments.length);
+  };
+  // The compile-time options to pass to the CoffeeScript compiler.
+  compile_options = function compile_options(source) {
+    var o;
+    o = {
+      source: source
+    };
+    o['no_wrap'] = options['no-wrap'];
+    return o;
+  };
+  // Print the `--help` usage message and exit.
+  usage = function usage() {
+    puts(option_parser.help());
+    return process.exit(0);
+  };
+  // Print the `--version` message and exit.
+  version = function version() {
+    puts("CoffeeScript version " + (CoffeeScript.VERSION));
+    return process.exit(0);
+  };
+})();

lib/command_line.js

@@ -1,201 +0,0 @@
-(function(){
-  var BANNER, SWITCHES, coffee, compile_script, compile_scripts, fs, lint, option_parser, options, optparse, parse_options, path, sources, usage, version, watch_scripts, write_js;
-  fs = require('fs');
-  path = require('path');
-  coffee = require('coffee-script');
-  optparse = require('optparse');
-  BANNER = "coffee compiles CoffeeScript source files into JavaScript.\n\nUsage:\n  coffee path/to/script.coffee";
-  SWITCHES = [['-i', '--interactive', 'run an interactive CoffeeScript REPL'], ['-r', '--run', 'compile and run a CoffeeScript'], ['-o', '--output [DIR]', 'set the directory for compiled JavaScript'], ['-w', '--watch', 'watch scripts for changes, and recompile'], ['-p', '--print', 'print the compiled JavaScript to stdout'], ['-l', '--lint', 'pipe the compiled JavaScript through JSLint'], ['-e', '--eval', 'compile a string from the command line'], ['-t', '--tokens', 'print the tokens that the lexer produces'], ['-tr', '--tree', 'print the parse tree that Jison produces'], ['-n', '--no-wrap', 'compile without the top-level function wrapper'], ['-v', '--version', 'display CoffeeScript version'], ['-h', '--help', 'display this help message']];
-  options = {};
-  sources = [];
-  option_parser = null;
-  // The CommandLine handles all of the functionality of the `coffee` utility.
-  exports.run = function run() {
-    var flags, separator;
-    parse_options();
-    if (options.interactive) {
-      return require('repl');
-    }
-    if (options.eval) {
-      return compile_script('terminal', sources[0]);
-    }
-    if (!(sources.length)) {
-      usage();
-    }
-    separator = sources.indexOf('--');
-    flags = [];
-    if (separator >= 0) {
-      flags = sources.slice((separator + 1), sources.length);
-      sources = sources.slice(0, separator);
-    }
-    process.ARGV = flags;
-    if (options.watch) {
-      watch_scripts();
-    }
-    compile_scripts();
-    return this;
-  };
-  // The "--help" usage message.
-  usage = function usage() {
-    puts('\n' + option_parser.help() + '\n');
-    return process.exit(0);
-  };
-  // The "--version" message.
-  version = function version() {
-    puts("CoffeeScript version " + coffee.VERSION);
-    return process.exit(0);
-  };
-  // Compiles the source CoffeeScript, returning the desired JavaScript, tokens,
-  // or JSLint results.
-  compile_scripts = function compile_scripts() {
-    var _a, _b, _c, compile, source;
-    compile = function compile(source) {
-      return fs.readFile(source, function(err, code) {
-        return compile_script(source, code);
-      });
-    };
-    _a = []; _b = sources;
-    for (_c = 0; _c < _b.length; _c++) {
-      source = _b[_c];
-      _a.push(compile(source));
-    }
-    return _a;
-  };
-  // Compile a single source script, containing the given code, according to the
-  // requested options. Both compile_scripts and watch_scripts share this method.
-  compile_script = function compile_script(source, code) {
-    var js, o, opts;
-    opts = options;
-    o = opts.no_wrap ? {
-      no_wrap: true
-    } : {};
-    try {
-      if (opts.tokens) {
-        return coffee.print_tokens(coffee.tokenize(code));
-      } else if (opts.tree) {
-        return puts(coffee.tree(code).toString());
-      } else {
-        js = coffee.compile(code, o);
-        if (opts.run) {
-          return eval(js);
-        } else if (opts.lint) {
-          return lint(js);
-        } else if (opts.print || opts.eval) {
-          return puts(js);
-        } else {
-          return write_js(source, js);
-        }
-      }
-    } catch (err) {
-      if (opts.watch) {
-        return puts(err.message);
-      } else {
-        throw err;
-      }
-    }
-  };
-  // Watch a list of source CoffeeScript files, recompiling them every time the
-  // files are updated.
-  watch_scripts = function watch_scripts() {
-    var _a, _b, _c, source, watch;
-    watch = function watch(source) {
-      return process.watchFile(source, {
-        persistent: true,
-        interval: 500
-      }, function(curr, prev) {
-        if (curr.mtime.getTime() === prev.mtime.getTime()) {
-          return null;
-        }
-        return fs.readFile(source, function(err, code) {
-          return compile_script(source, code);
-        });
-      });
-    };
-    _a = []; _b = sources;
-    for (_c = 0; _c < _b.length; _c++) {
-      source = _b[_c];
-      _a.push(watch(source));
-    }
-    return _a;
-  };
-  // Write out a JavaScript source file with the compiled code.
-  write_js = function write_js(source, js) {
-    var dir, filename, js_path;
-    filename = path.basename(source, path.extname(source)) + '.js';
-    dir = options.output || path.dirname(source);
-    js_path = path.join(dir, filename);
-    return fs.writeFile(js_path, js);
-  };
-  // Pipe compiled JS through JSLint (requires a working 'jsl' command).
-  lint = function lint(js) {
-    var jsl;
-    jsl = process.createChildProcess('jsl', ['-nologo', '-stdin']);
-    jsl.addListener('output', function(result) {
-      if (result) {
-        return puts(result.replace(/\n/g, ''));
-      }
-    });
-    jsl.addListener('error', function(result) {
-      if (result) {
-        return puts(result);
-      }
-    });
-    jsl.write(js);
-    return jsl.close();
-  };
-  // Use OptionParser for all the options.
-  parse_options = function parse_options() {
-    var oparser, opts, paths;
-    opts = (options = {});
-    oparser = (option_parser = new optparse.OptionParser(SWITCHES));
-    oparser.banner = BANNER;
-    oparser.add('interactive', function() {
-      return opts.interactive = true;
-    });
-    oparser.add('run', function() {
-      return opts.run = true;
-    });
-    oparser.add('output', function(dir) {
-      return opts.output = dir;
-    });
-    oparser.add('watch', function() {
-      return opts.watch = true;
-    });
-    oparser.add('print', function() {
-      return opts.print = true;
-    });
-    oparser.add('lint', function() {
-      return opts.lint = true;
-    });
-    oparser.add('eval', function() {
-      return opts.eval = true;
-    });
-    oparser.add('tokens', function() {
-      return opts.tokens = true;
-    });
-    oparser.add('tree', function() {
-      return opts.tree = true;
-    });
-    oparser.add('no-wrap', function() {
-      return opts.no_wrap = true;
-    });
-    oparser.add('help', (function(__this) {
-      var __func = function() {
-        return usage();
-      };
-      return (function() {
-        return __func.apply(__this, arguments);
-      });
-    })(this));
-    oparser.add('version', (function(__this) {
-      var __func = function() {
-        return version();
-      };
-      return (function() {
-        return __func.apply(__this, arguments);
-      });
-    })(this));
-    paths = oparser.parse(process.ARGV);
-    return sources = paths.slice(2, paths.length);
-  };
-})();

lib/grammar.js

@@ -1,69 +1,98 @@
 (function(){
-  var Parser, _a, _b, _c, _d, _e, _f, bnf, grammar, name, non_terminal, o, operators, option, part, tokens, unwrap;
+  var Parser, _a, _b, _c, _d, _e, _f, _g, _h, alt, alternatives, grammar, name, o, operators, token, tokens, unwrap;
   var __hasProp = Object.prototype.hasOwnProperty;
+  // The CoffeeScript parser is generated by [Jison](http://github.com/zaach/jison)
+  // from this grammar file. Jison is a bottom-up parser generator, similar in
+  // style to [Bison](http://www.gnu.org/software/bison), implemented in JavaScript.
+  // It can recognize [LALR(1), LR(0), SLR(1), and LR(1)](http://en.wikipedia.org/wiki/LR_grammar)
+  // type grammars. To create the Jison parser, we list the pattern to match
+  // on the left-hand side, and the action to take (usually the creation of syntax
+  // tree nodes) on the right. As the parser runs, it
+  // shifts tokens from our token stream, from left to right, and
+  // [attempts to match](http://en.wikipedia.org/wiki/Bottom-up_parsing)
+  // the token sequence against the rules below. When a match can be made, it
+  // reduces into the [nonterminal](http://en.wikipedia.org/wiki/Terminal_and_nonterminal_symbols)
+  // (the enclosing name at the top), and we proceed from there.
+  // If you run the `cake build:parser` command, Jison constructs a parse table
+  // from our rules and saves it into `lib/parser.js`.
+  // The only dependency is on the **Jison.Parser**.
   Parser = require('jison').Parser;
-  // DSL ===================================================================
-  // Detect functions: [
+  // Jison DSL
+  // ---------
+  // Since we're going to be wrapped in a function by Jison in any case, if our
+  // action immediately returns a value, we can optimize by removing the function
+  // wrapper and just returning the value directly.
   unwrap = /function\s*\(\)\s*\{\s*return\s*([\s\S]*);\s*\}/;
-  // Quickie DSL for Jison access.
-  o = function o(pattern_string, func, options) {
+  // Our handy DSL for Jison grammar generation, thanks to
+  // [Tim Caswell](http://github.com/creationix). For every rule in the grammar,
+  // we pass the pattern-defining string, the action to run, and extra options,
+  // optionally. If no action is specified, we simply pass the value of the
+  // previous nonterminal.
+  o = function o(pattern_string, action, options) {
     var match;
-    if (func) {
-      func = (match = (func + "").match(unwrap)) ? match[1] : '(' + func + '())';
-      return [pattern_string, '$$ = ' + func + ';', options];
-    } else {
+    if (!(action)) {
       return [pattern_string, '$$ = $1;', options];
     }
+    action = (match = (action + '').match(unwrap)) ? match[1] : "(" + action + "())";
+    return [pattern_string, "$$ = " + action + ";", options];
   };
-  // Precedence ===========================================================
-  operators = [["left", '?'], ["nonassoc", 'UMINUS', 'UPLUS', 'NOT', '!', '!!', '~', '++', '--'], ["left", '*', '/', '%'], ["left", '+', '-'], ["left", '<<', '>>', '>>>'], ["left", '&', '|', '^'], ["left", '<=', '<', '>', '>='], ["right", 'DELETE', 'INSTANCEOF', 'TYPEOF'], ["right", '==', '!=', 'IS', 'ISNT'], ["left", '&&', '||', 'AND', 'OR'], ["right", '-=', '+=', '/=', '*=', '%=', '||=', '&&=', '?='], ["left", '.'], ["right", 'INDENT'], ["left", 'OUTDENT'], ["right", 'WHEN', 'LEADING_WHEN', 'IN', 'OF', 'BY', 'THROW'], ["right", 'FOR', 'NEW', 'SUPER'], ["left", 'EXTENDS'], ["right", 'ASSIGN', 'RETURN'], ["right", '->', '=>', 'UNLESS', 'IF', 'ELSE', 'WHILE']];
-  // Grammar ==============================================================
+  // Grammatical Rules
+  // -----------------
+  // In all of the rules that follow, you'll see the name of the nonterminal as
+  // the key to a list of alternative matches. With each match's action, the
+  // dollar-sign variables are provided by Jison as references to the value of
+  // their numeric position, so in this rule:
+  //     "Expression UNLESS Expression"
+  // `$1` would be the value of the first `Expression`, `$2` would be the token
+  // for the `UNLESS` terminal, and `$3` would be the value of the second
+  // `Expression`.
   grammar = {
-    // All parsing will end in this rule, being the trunk of the AST.
+    // The **Root** is the top-level node in the syntax tree. Since we parse bottom-up,
+    // all parsing must end here.
     Root: [o("", function() {
         return new Expressions();
       }), o("TERMINATOR", function() {
         return new Expressions();
-      }), o("Expressions", function() {
-        return $1;
-      }), o("Block TERMINATOR", function() {
-        return $1;
-      })
+      }), o("Expressions"), o("Block TERMINATOR")
     ],
-    // Any list of expressions or method body, seperated by line breaks or semis.
+    // Any list of expressions or method body, seperated by line breaks or
+    // semicolons.
     Expressions: [o("Expression", function() {
         return Expressions.wrap([$1]);
       }), o("Expressions TERMINATOR Expression", function() {
         return $1.push($3);
-      }), o("Expressions TERMINATOR", function() {
-        return $1;
-      })
+      }), o("Expressions TERMINATOR")
     ],
-    // All types of expressions in our language. The basic unit of CoffeeScript
-    // is the expression.
-    Expression: [o("Value"), o("Call"), o("Code"), o("Operation"), o("Assign"), o("If"), o("Try"), o("Throw"), o("Return"), o("While"), o("For"), o("Switch"), o("Extends"), o("Splat"), o("Existence"), o("Comment")],
-    // A block of expressions. Note that the Rewriter will convert some postfix
-    // forms into blocks for us, by altering the token stream.
+    // All the different types of expressions in our language. The basic unit of
+    // CoffeeScript is the **Expression** -- you'll notice that there is no
+    // "statement" nonterminal. Expressions serve as the building blocks
+    // of many other rules, making them somewhat circular.
+    Expression: [o("Value"), o("Call"), o("Code"), o("Operation"), o("Assign"), o("If"), o("Try"), o("Throw"), o("Return"), o("While"), o("For"), o("Switch"), o("Extends"), o("Class"), o("Splat"), o("Existence"), o("Comment")],
+    // A an indented block of expressions. Note that the [Rewriter](rewriter.html)
+    // will convert some postfix forms into blocks for us, by adjusting the
+    // token stream.
     Block: [o("INDENT Expressions OUTDENT", function() {
         return $2;
       }), o("INDENT OUTDENT", function() {
         return new Expressions();
       })
     ],
+    // A literal identifier, a variable name or property.
     Identifier: [o("IDENTIFIER", function() {
         return new LiteralNode(yytext);
       })
     ],
+    // Alphanumerics are separated from the other **Literal** matchers because
+    // they can also serve as keys in object literals.
     AlphaNumeric: [o("NUMBER", function() {
         return new LiteralNode(yytext);
       }), o("STRING", function() {
         return new LiteralNode(yytext);
       })
     ],
-    // All hard-coded values. These can be printed straight to JavaScript.
-    Literal: [o("AlphaNumeric", function() {
-        return $1;
-      }), o("JS", function() {
+    // All of our immediate values. These can (in general), be passed straight
+    // through and printed to JavaScript.
+    Literal: [o("AlphaNumeric"), o("JS", function() {
         return new LiteralNode(yytext);
       }), o("REGEX", function() {
         return new LiteralNode(yytext);
@@ -85,33 +114,383 @@
         return new LiteralNode(false);
       })
     ],
-    // Assignment to a variable (or index).
+    // Assignment of a variable, property, or index to a value.
     Assign: [o("Value ASSIGN Expression", function() {
         return new AssignNode($1, $3);
       })
     ],
-    // Assignment within an object literal (can be quoted).
+    // Assignment when it happens within an object literal. The difference from
+    // the ordinary **Assign** is that these allow numbers and strings as keys.
     AssignObj: [o("Identifier ASSIGN Expression", function() {
         return new AssignNode(new ValueNode($1), $3, 'object');
       }), o("AlphaNumeric ASSIGN Expression", function() {
         return new AssignNode(new ValueNode($1), $3, 'object');
       }), o("Comment")
     ],
-    // A return statement.
+    // A return statement from a function body.
     Return: [o("RETURN Expression", function() {
         return new ReturnNode($2);
       }), o("RETURN", function() {
         return new ReturnNode(new ValueNode(new LiteralNode('null')));
       })
     ],
-    // A comment.
+    // A comment. Because CoffeeScript passes comments through to JavaScript, we
+    // have to parse comments like any other construct, and identify all of the
+    // positions in which they can occur in the grammar.
     Comment: [o("COMMENT", function() {
         return new CommentNode(yytext);
       })
     ],
-    // Arithmetic and logical operators
-    // For Ruby's Operator precedence, see: [
-    // https://www.cs.auckland.ac.nz/references/ruby/ProgrammingRuby/language.html
+    // [The existential operator](http://jashkenas.github.com/coffee-script/#existence).
+    Existence: [o("Expression ?", function() {
+        return new ExistenceNode($1);
+      })
+    ],
+    // The **Code** node is the function literal. It's defined by an indented block
+    // of **Expressions** preceded by a function arrow, with an optional parameter
+    // list.
+    Code: [o("PARAM_START ParamList PARAM_END FuncGlyph Block", function() {
+        return new CodeNode($2, $5, $4);
+      }), o("FuncGlyph Block", function() {
+        return new CodeNode([], $2, $1);
+      })
+    ],
+    // CoffeeScript has two different symbols for functions. `->` is for ordinary
+    // functions, and `=>` is for functions bound to the current value of *this*.
+    FuncGlyph: [o("->", function() {
+        return 'func';
+      }), o("=>", function() {
+        return 'boundfunc';
+      })
+    ],
+    // The list of parameters that a function accepts can be of any length.
+    ParamList: [o("", function() {
+        return [];
+      }), o("Param", function() {
+        return [$1];
+      }), o("ParamList , Param", function() {
+        return $1.concat([$3]);
+      })
+    ],
+    // A single parameter in a function definition can be ordinary, or a splat
+    // that hoovers up the remaining arguments.
+    Param: [o("PARAM", function() {
+        return new LiteralNode(yytext);
+      }), o("Param . . .", function() {
+        return new SplatNode($1);
+      })
+    ],
+    // A splat that occurs outside of a parameter list.
+    Splat: [o("Expression . . .", function() {
+        return new SplatNode($1);
+      })
+    ],
+    // The types of things that can be treated as values -- assigned to, invoked
+    // as functions, indexed into, named as a class, etc.
+    Value: [o("Identifier", function() {
+        return new ValueNode($1);
+      }), o("Literal", function() {
+        return new ValueNode($1);
+      }), o("Array", function() {
+        return new ValueNode($1);
+      }), o("Object", function() {
+        return new ValueNode($1);
+      }), o("Parenthetical", function() {
+        return new ValueNode($1);
+      }), o("Range", function() {
+        return new ValueNode($1);
+      }), o("This"), o("Value Accessor", function() {
+        return $1.push($2);
+      }), o("Invocation Accessor", function() {
+        return new ValueNode($1, [$2]);
+      })
+    ],
+    // The general group of accessors into an object, by property, by prototype
+    // or by array index or slice.
+    Accessor: [o("PROPERTY_ACCESS Identifier", function() {
+        return new AccessorNode($2);
+      }), o("PROTOTYPE_ACCESS Identifier", function() {
+        return new AccessorNode($2, 'prototype');
+      }), o("SOAK_ACCESS Identifier", function() {
+        return new AccessorNode($2, 'soak');
+      }), o("Index"), o("Slice", function() {
+        return new SliceNode($1);
+      })
+    ],
+    // Indexing into an object or array using bracket notation.
+    Index: [o("INDEX_START Expression INDEX_END", function() {
+        return new IndexNode($2);
+      }), o("SOAKED_INDEX_START Expression SOAKED_INDEX_END", function() {
+        return new IndexNode($2, 'soak');
+      })
+    ],
+    // In CoffeeScript, an object literal is simply a list of assignments.
+    Object: [o("{ AssignList }", function() {
+        return new ObjectNode($2);
+      }), o("{ IndentedAssignList }", function() {
+        return new ObjectNode($2);
+      })
+    ],
+    // Class definitions have optional bodies of prototype property assignments,
+    // and optional references to the superclass.
+    Class: [o("CLASS Value", function() {
+        return new ClassNode($2);
+      }), o("CLASS Value EXTENDS Value", function() {
+        return new ClassNode($2, $4);
+      }), o("CLASS Value IndentedAssignList", function() {
+        return new ClassNode($2, null, $3);
+      }), o("CLASS Value EXTENDS Value IndentedAssignList", function() {
+        return new ClassNode($2, $4, $5);
+      })
+    ],
+    // Assignment of properties within an object literal can be separated by
+    // comma, as in JavaScript, or simply by newline.
+    AssignList: [o("", function() {
+        return [];
+      }), o("AssignObj", function() {
+        return [$1];
+      }), o("AssignList , AssignObj", function() {
+        return $1.concat([$3]);
+      }), o("AssignList TERMINATOR AssignObj", function() {
+        return $1.concat([$3]);
+      }), o("AssignList , TERMINATOR AssignObj", function() {
+        return $1.concat([$4]);
+      })
+    ],
+    // An **AssignList** within a block indentation.
+    IndentedAssignList: [o("INDENT AssignList OUTDENT", function() {
+        return $2;
+      })
+    ],
+    // The three flavors of function call: normal, object instantiation with `new`,
+    // and calling `super()`
+    Call: [o("Invocation"), o("NEW Invocation", function() {
+        return $2.new_instance();
+      }), o("Super")
+    ],
+    // Extending an object by setting its prototype chain to reference a parent
+    // object.
+    Extends: [o("Value EXTENDS Value", function() {
+        return new ExtendsNode($1, $3);
+      })
+    ],
+    // Ordinary function invocation, or a chained series of calls.
+    Invocation: [o("Value Arguments", function() {
+        return new CallNode($1, $2);
+      }), o("Invocation Arguments", function() {
+        return new CallNode($1, $2);
+      })
+    ],
+    // The list of arguments to a function call.
+    Arguments: [o("CALL_START ArgList CALL_END", function() {
+        return $2;
+      })
+    ],
+    // Calling super.
+    Super: [o("SUPER CALL_START ArgList CALL_END", function() {
+        return new CallNode('super', $3);
+      })
+    ],
+    // A reference to the *this* current object, either naked or to a property.
+    This: [o("@", function() {
+        return new ValueNode(new LiteralNode('this'));
+      }), o("@ Identifier", function() {
+        return new ValueNode(new LiteralNode('this'), [new AccessorNode($2)]);
+      })
+    ],
+    // The CoffeeScript range literal.
+    Range: [o("[ Expression . . Expression ]", function() {
+        return new RangeNode($2, $5);
+      }), o("[ Expression . . . Expression ]", function() {
+        return new RangeNode($2, $6, true);
+      })
+    ],
+    // The slice literal.
+    Slice: [o("INDEX_START Expression . . Expression INDEX_END", function() {
+        return new RangeNode($2, $5);
+      }), o("INDEX_START Expression . . . Expression INDEX_END", function() {
+        return new RangeNode($2, $6, true);
+      })
+    ],
+    // The array literal.
+    Array: [o("[ ArgList ]", function() {
+        return new ArrayNode($2);
+      })
+    ],
+    // The **ArgList** is both the list of objects passed into a function call,
+    // as well as the contents of an array literal
+    // (i.e. comma-separated expressions). Newlines work as well.
+    ArgList: [o("", function() {
+        return [];
+      }), o("Expression", function() {
+        return [$1];
+      }), o("INDENT Expression", function() {
+        return [$2];
+      }), o("ArgList , Expression", function() {
+        return $1.concat([$3]);
+      }), o("ArgList TERMINATOR Expression", function() {
+        return $1.concat([$3]);
+      }), o("ArgList , TERMINATOR Expression", function() {
+        return $1.concat([$4]);
+      }), o("ArgList , INDENT Expression", function() {
+        return $1.concat([$4]);
+      }), o("ArgList OUTDENT")
+    ],
+    // Just simple, comma-separated, required arguments (no fancy syntax). We need
+    // this to be separate from the **ArgList** for use in **Switch** blocks, where
+    // having the newlines wouldn't make sense.
+    SimpleArgs: [o("Expression"), o("SimpleArgs , Expression", function() {
+        return $1 instanceof Array ? $1.concat([$3]) : [$1].concat([$3]);
+      })
+    ],
+    // The variants of *try/catch/finally* exception handling blocks.
+    Try: [o("TRY Block Catch", function() {
+        return new TryNode($2, $3[0], $3[1]);
+      }), o("TRY Block FINALLY Block", function() {
+        return new TryNode($2, null, null, $4);
+      }), o("TRY Block Catch FINALLY Block", function() {
+        return new TryNode($2, $3[0], $3[1], $5);
+      })
+    ],
+    // A catch clause names its error and runs a block of code.
+    Catch: [o("CATCH Identifier Block", function() {
+        return [$2, $3];
+      })
+    ],
+    // Throw an exception object.
+    Throw: [o("THROW Expression", function() {
+        return new ThrowNode($2);
+      })
+    ],
+    // Parenthetical expressions. Note that the **Parenthetical** is a **Value**,
+    // not an **Expression**, so if you need to use an expression in a place
+    // where only values are accepted, wrapping it in parentheses will always do
+    // the trick.
+    Parenthetical: [o("( Expression )", function() {
+        return new ParentheticalNode($2);
+      })
+    ],
+    // The condition portion of a while loop.
+    WhileSource: [o("WHILE Expression", function() {
+        return new WhileNode($2);
+      }), o("WHILE Expression WHEN Expression", function() {
+        return new WhileNode($2, {
+          filter: $4
+        });
+      })
+    ],
+    // The while loop can either be normal, with a block of expressions to execute,
+    // or postfix, with a single expression. There is no do..while.
+    While: [o("WhileSource Block", function() {
+        return $1.add_body($2);
+      }), o("Expression WhileSource", function() {
+        return $2.add_body($1);
+      })
+    ],
+    // Array, object, and range comprehensions, at the most generic level.
+    // Comprehensions can either be normal, with a block of expressions to execute,
+    // or postfix, with a single expression.
+    For: [o("Expression FOR ForVariables ForSource", function() {
+        return new ForNode($1, $4, $3[0], $3[1]);
+      }), o("FOR ForVariables ForSource Block", function() {
+        return new ForNode($4, $3, $2[0], $2[1]);
+      })
+    ],
+    // An array or range comprehension has variables for the current element and
+    // (optional) reference to the current index. Or, *key, value*, in the case
+    // of object comprehensions.
+    ForVariables: [o("Identifier", function() {
+        return [$1];
+      }), o("Identifier , Identifier", function() {
+        return [$1, $3];
+      })
+    ],
+    // The source of a comprehension is an array or object with an optional filter
+    // clause. If it's an array comprehension, you can also choose to step throug
+    // in fixed-size increments.
+    ForSource: [o("IN Expression", function() {
+        return {
+          source: $2
+        };
+      }), o("OF Expression", function() {
+        return {
+          source: $2,
+          object: true
+        };
+      }), o("ForSource WHEN Expression", function() {
+        $1.filter = $3;
+        return $1;
+      }), o("ForSource BY Expression", function() {
+        $1.step = $3;
+        return $1;
+      })
+    ],
+    // The CoffeeScript switch/when/else block replaces the JavaScript
+    // switch/case/default by compiling into an if-else chain.
+    Switch: [o("SWITCH Expression INDENT Whens OUTDENT", function() {
+        return $4.rewrite_condition($2);
+      }), o("SWITCH Expression INDENT Whens ELSE Block OUTDENT", function() {
+        return $4.rewrite_condition($2).add_else($6, true);
+      })
+    ],
+    // The inner list of whens is left recursive. At code-generation time, the
+    // IfNode will rewrite them into a proper chain.
+    Whens: [o("When"), o("Whens When", function() {
+        return $1.push($2);
+      })
+    ],
+    // An individual **When** clause, with action.
+    When: [o("LEADING_WHEN SimpleArgs Block", function() {
+        return new IfNode($2, $3, null, {
+          statement: true
+        });
+      }), o("LEADING_WHEN SimpleArgs Block TERMINATOR", function() {
+        return new IfNode($2, $3, null, {
+          statement: true
+        });
+      }), o("Comment TERMINATOR When", function() {
+        $3.comment = $1;
+        return $3;
+      })
+    ],
+    // The most basic form of *if* is a condition and an action. The following
+    // if-related rules are broken up along these lines in order to avoid
+    // ambiguity.
+    IfStart: [o("IF Expression Block", function() {
+        return new IfNode($2, $3);
+      }), o("IfStart ElsIf", function() {
+        return $1.add_else($2);
+      })
+    ],
+    // An **IfStart** can optionally be followed by an else block.
+    IfBlock: [o("IfStart"), o("IfStart ELSE Block", function() {
+        return $1.add_else($3);
+      })
+    ],
+    // An *else if* continuation of the *if* expression.
+    ElsIf: [o("ELSE IF Expression Block", function() {
+        return (new IfNode($3, $4)).force_statement();
+      })
+    ],
+    // The full complement of *if* expressions, including postfix one-liner
+    // *if* and *unless*.
+    If: [o("IfBlock"), o("Expression IF Expression", function() {
+        return new IfNode($3, Expressions.wrap([$1]), null, {
+          statement: true
+        });
+      }), o("Expression UNLESS Expression", function() {
+        return new IfNode($3, Expressions.wrap([$1]), null, {
+          statement: true,
+          invert: true
+        });
+      })
+    ],
+    // Arithmetic and logical operators, working on one or more operands.
+    // Here they are grouped by order of precedence. The actual precedence rules
+    // are defined at the bottom of the page. It would be shorter if we could
+    // combine most of these rules into a single generic *Operand OpSymbol Operand*
+    // -type rule, but in order to make the precedence binding possible, separate
+    // rules are necessary.
     Operation: [o("! Expression", function() {
         return new OpNode('!', $2);
       }), o("!! Expression", function() {
@@ -209,356 +588,55 @@
       }), o("Expression IN Expression", function() {
         return new OpNode('in', $1, $3);
       })
-    ],
-    // The existence operator.
-    Existence: [o("Expression ?", function() {
-        return new ExistenceNode($1);
-      })
-    ],
-    // Function definition.
-    Code: [o("PARAM_START ParamList PARAM_END FuncGlyph Block", function() {
-        return new CodeNode($2, $5, $4);
-      }), o("FuncGlyph Block", function() {
-        return new CodeNode([], $2, $1);
-      })
-    ],
-    // The symbols to signify functions, and bound functions.
-    FuncGlyph: [o("->", function() {
-        return 'func';
-      }), o("=>", function() {
-        return 'boundfunc';
-      })
-    ],
-    // The parameters to a function definition.
-    ParamList: [o("", function() {
-        return [];
-      }), o("Param", function() {
-        return [$1];
-      }), o("ParamList , Param", function() {
-        return $1.concat([$3]);
-      })
-    ],
-    // A Parameter (or ParamSplat) in a function definition.
-    Param: [o("PARAM", function() {
-        return new LiteralNode(yytext);
-      }), o("Param . . .", function() {
-        return new SplatNode($1);
-      })
-    ],
-    // A regular splat.
-    Splat: [o("Expression . . .", function() {
-        return new SplatNode($1);
-      })
-    ],
-    // Expressions that can be treated as values.
-    Value: [o("Identifier", function() {
-        return new ValueNode($1);
-      }), o("Literal", function() {
-        return new ValueNode($1);
-      }), o("Array", function() {
-        return new ValueNode($1);
-      }), o("Object", function() {
-        return new ValueNode($1);
-      }), o("Parenthetical", function() {
-        return new ValueNode($1);
-      }), o("Range", function() {
-        return new ValueNode($1);
-      }), o("This", function() {
-        return $1;
-      }), o("Value Accessor", function() {
-        return $1.push($2);
-      }), o("Invocation Accessor", function() {
-        return new ValueNode($1, [$2]);
-      })
-    ],
-    // Accessing into an object or array, through dot or index notation.
-    Accessor: [o("PROPERTY_ACCESS Identifier", function() {
-        return new AccessorNode($2);
-      }), o("PROTOTYPE_ACCESS Identifier", function() {
-        return new AccessorNode($2, 'prototype');
-      }), o("SOAK_ACCESS Identifier", function() {
-        return new AccessorNode($2, 'soak');
-      }), o("Index"), o("Slice", function() {
-        return new SliceNode($1);
-      })
-    ],
-    // Indexing into an object or array.
-    Index: [o("INDEX_START Expression INDEX_END", function() {
-        return new IndexNode($2);
-      }), o("SOAKED_INDEX_START Expression SOAKED_INDEX_END", function() {
-        return new IndexNode($2, 'soak');
-      })
-    ],
-    // An object literal.
-    Object: [o("{ AssignList }", function() {
-        return new ObjectNode($2);
-      })
-    ],
-    // Assignment within an object literal (comma or newline separated).
-    AssignList: [o("", function() {
-        return [];
-      }), o("AssignObj", function() {
-        return [$1];
-      }), o("AssignList , AssignObj", function() {
-        return $1.concat([$3]);
-      }), o("AssignList TERMINATOR AssignObj", function() {
-        return $1.concat([$3]);
-      }), o("AssignList , TERMINATOR AssignObj", function() {
-        return $1.concat([$4]);
-      }), o("INDENT AssignList OUTDENT", function() {
-        return $2;
-      })
-    ],
-    // All flavors of function call (instantiation, super, and regular).
-    Call: [o("Invocation", function() {
-        return $1;
-      }), o("NEW Invocation", function() {
-        return $2.new_instance();
-      }), o("Super", function() {
-        return $1;
-      })
-    ],
-    // Extending an object's prototype.
-    Extends: [o("Value EXTENDS Value", function() {
-        return new ExtendsNode($1, $3);
-      })
-    ],
-    // A generic function invocation.
-    Invocation: [o("Value Arguments", function() {
-        return new CallNode($1, $2);
-      }), o("Invocation Arguments", function() {
-        return new CallNode($1, $2);
-      })
-    ],
-    // The list of arguments to a function invocation.
-    Arguments: [o("CALL_START ArgList CALL_END", function() {
-        return $2;
-      })
-    ],
-    // Calling super.
-    Super: [o("SUPER CALL_START ArgList CALL_END", function() {
-        return new CallNode('super', $3);
-      })
-    ],
-    // This references, either naked or to a property.
-    This: [o("@", function() {
-        return new ValueNode(new LiteralNode('this'));
-      }), o("@ Identifier", function() {
-        return new ValueNode(new LiteralNode('this'), [new AccessorNode($2)]);
-      })
-    ],
-    // The range literal.
-    Range: [o("[ Expression . . Expression ]", function() {
-        return new RangeNode($2, $5);
-      }), o("[ Expression . . . Expression ]", function() {
-        return new RangeNode($2, $6, true);
-      })
-    ],
-    // The slice literal.
-    Slice: [o("INDEX_START Expression . . Expression INDEX_END", function() {
-        return new RangeNode($2, $5);
-      }), o("INDEX_START Expression . . . Expression INDEX_END", function() {
-        return new RangeNode($2, $6, true);
-      })
-    ],
-    // The array literal.
-    Array: [o("[ ArgList ]", function() {
-        return new ArrayNode($2);
-      })
-    ],
-    // A list of arguments to a method call, or as the contents of an array.
-    ArgList: [o("", function() {
-        return [];
-      }), o("Expression", function() {
-        return [$1];
-      }), o("INDENT Expression", function() {
-        return [$2];
-      }), o("ArgList , Expression", function() {
-        return $1.concat([$3]);
-      }), o("ArgList TERMINATOR Expression", function() {
-        return $1.concat([$3]);
-      }), o("ArgList , TERMINATOR Expression", function() {
-        return $1.concat([$4]);
-      }), o("ArgList , INDENT Expression", function() {
-        return $1.concat([$4]);
-      }), o("ArgList OUTDENT", function() {
-        return $1;
-      })
-    ],
-    // Just simple, comma-separated, required arguments (no fancy syntax).
-    SimpleArgs: [o("Expression", function() {
-        return $1;
-      }), o("SimpleArgs , Expression", function() {
-        return $1 instanceof Array ? $1.concat([$3]) : [$1].concat([$3]);
-      })
-    ],
-    // Try/catch/finally exception handling blocks.
-    Try: [o("TRY Block Catch", function() {
-        return new TryNode($2, $3[0], $3[1]);
-      }), o("TRY Block FINALLY Block", function() {
-        return new TryNode($2, null, null, $4);
-      }), o("TRY Block Catch FINALLY Block", function() {
-        return new TryNode($2, $3[0], $3[1], $5);
-      })
-    ],
-    // A catch clause.
-    Catch: [o("CATCH Identifier Block", function() {
-        return [$2, $3];
-      })
-    ],
-    // Throw an exception.
-    Throw: [o("THROW Expression", function() {
-        return new ThrowNode($2);
-      })
-    ],
-    // Parenthetical expressions.
-    Parenthetical: [o("( Expression )", function() {
-        return new ParentheticalNode($2);
-      })
-    ],
-    // The condition for a while loop.
-    WhileSource: [o("WHILE Expression", function() {
-        return new WhileNode($2);
-      }), o("WHILE Expression WHEN Expression", function() {
-        return new WhileNode($2, {
-          filter: $4
-        });
-      })
-    ],
-    // The while loop. (there is no do..while).
-    While: [o("WhileSource Block", function() {
-        return $1.add_body($2);
-      }), o("Expression WhileSource", function() {
-        return $2.add_body($1);
-      })
-    ],
-    // Array comprehensions, including guard and current index.
-    // Looks a little confusing, check nodes.rb for the arguments to ForNode.
-    For: [o("Expression FOR ForVariables ForSource", function() {
-        return new ForNode($1, $4, $3[0], $3[1]);
-      }), o("FOR ForVariables ForSource Block", function() {
-        return new ForNode($4, $3, $2[0], $2[1]);
-      })
-    ],
-    // An array comprehension has variables for the current element and index.
-    ForVariables: [o("Identifier", function() {
-        return [$1];
-      }), o("Identifier , Identifier", function() {
-        return [$1, $3];
-      })
-    ],
-    // The source of the array comprehension can optionally be filtered.
-    ForSource: [o("IN Expression", function() {
-        return {
-          source: $2
-        };
-      }), o("OF Expression", function() {
-        return {
-          source: $2,
-          object: true
-        };
-      }), o("ForSource WHEN Expression", function() {
-        $1.filter = $3;
-        return $1;
-      }), o("ForSource BY Expression", function() {
-        $1.step = $3;
-        return $1;
-      })
-    ],
-    // Switch/When blocks.
-    Switch: [o("SWITCH Expression INDENT Whens OUTDENT", function() {
-        return $4.rewrite_condition($2);
-      }), o("SWITCH Expression INDENT Whens ELSE Block OUTDENT", function() {
-        return $4.rewrite_condition($2).add_else($6, true);
-      })
-    ],
-    // The inner list of whens.
-    Whens: [o("When", function() {
-        return $1;
-      }), o("Whens When", function() {
-        return $1.push($2);
-      })
-    ],
-    // An individual when.
-    When: [o("LEADING_WHEN SimpleArgs Block", function() {
-        return new IfNode($2, $3, null, {
-          statement: true
-        });
-      }), o("LEADING_WHEN SimpleArgs Block TERMINATOR", function() {
-        return new IfNode($2, $3, null, {
-          statement: true
-        });
-      }), o("Comment TERMINATOR When", function() {
-        $3.comment = $1;
-        return $3;
-      })
-    ],
-    // The most basic form of "if".
-    IfStart: [o("IF Expression Block", function() {
-        return new IfNode($2, $3);
-      }), o("IfStart ElsIfs", function() {
-        return $1.add_else($2);
-      })
-    ],
-    IfBlock: [o("IfStart", function() {
-        return $1;
-      }), o("IfStart ELSE Block", function() {
-        return $1.add_else($3);
-      })
-    ],
-    // Multiple elsifs can be chained together.
-    ElsIfs: [o("ELSE IF Expression Block", function() {
-        return (new IfNode($3, $4)).force_statement();
-      }), o("ElsIfs ElsIf", function() {
-        return $1.add_else($2);
-      })
-    ],
-    // The full complement of if blocks, including postfix one-liner ifs and unlesses.
-    If: [o("IfBlock", function() {
-        return $1;
-      }), o("Expression IF Expression", function() {
-        return new IfNode($3, Expressions.wrap([$1]), null, {
-          statement: true
-        });
-      }), o("Expression UNLESS Expression", function() {
-        return new IfNode($3, Expressions.wrap([$1]), null, {
-          statement: true,
-          invert: true
-        });
-      })
     ]
   };
-  // Helpers ==============================================================
-  // Make the Jison parser.
-  bnf = {};
+  // Precedence
+  // ----------
+  // Operators at the top of this list have higher precedence than the ones lower
+  // down. Following these rules is what makes `2 + 3 * 4` parse as:
+  //     2 + (3 * 4)
+  // And not:
+  //     (2 + 3) * 4
+  operators = [["left", '?'], ["nonassoc", 'UMINUS', 'UPLUS', 'NOT', '!', '!!', '~', '++', '--'], ["left", '*', '/', '%'], ["left", '+', '-'], ["left", '<<', '>>', '>>>'], ["left", '&', '|', '^'], ["left", '<=', '<', '>', '>='], ["right", 'DELETE', 'INSTANCEOF', 'TYPEOF'], ["left", '==', '!=', 'IS', 'ISNT'], ["left", '&&', '||', 'AND', 'OR'], ["right", '-=', '+=', '/=', '*=', '%=', '||=', '&&=', '?='], ["left", '.'], ["right", 'INDENT'], ["left", 'OUTDENT'], ["right", 'WHEN', 'LEADING_WHEN', 'IN', 'OF', 'BY', 'THROW'], ["right", 'FOR', 'NEW', 'SUPER', 'CLASS'], ["left", 'EXTENDS'], ["right", 'ASSIGN', 'RETURN'], ["right", '->', '=>', 'UNLESS', 'IF', 'ELSE', 'WHILE']];
+  // Wrapping Up
+  // -----------
+  // Finally, now what we have our **grammar** and our **operators**, we can create
+  // our **Jison.Parser**. We do this by processing all of our rules, recording all
+  // terminals (every symbol which does not appear as the name of a rule above)
+  // as "tokens".
   tokens = [];
   _a = grammar;
   for (name in _a) { if (__hasProp.call(_a, name)) {
-    non_terminal = _a[name];
-    bnf[name] = (function() {
-      _b = []; _c = non_terminal;
-      for (_d = 0; _d < _c.length; _d++) {
-        option = _c[_d];
+    alternatives = _a[name];
+    grammar[name] = (function() {
+      _b = []; _c = alternatives;
+      for (_d = 0, _e = _c.length; _d < _e; _d++) {
+        alt = _c[_d];
         _b.push((function() {
-          _e = option[0].split(" ");
-          for (_f = 0; _f < _e.length; _f++) {
-            part = _e[_f];
-            !grammar[part] ? tokens.push(part) : null;
+          _f = alt[0].split(' ');
+          for (_g = 0, _h = _f.length; _g < _h; _g++) {
+            token = _f[_g];
+            if (!(grammar[token])) {
+              tokens.push(token);
+            }
           }
-          name === "Root" ? (option[1] = "return " + option[1]) : null;
-          return option;
+          if (name === 'Root') {
+            alt[1] = "return " + (alt[1]);
+          }
+          return alt;
         }).call(this));
       }
       return _b;
     }).call(this);
   }}
-  tokens = tokens.join(" ");
+  // Initialize the **Parser** with our list of terminal **tokens**, our **grammar**
+  // rules, and the name of the root. Reverse the operators because Jison orders
+  // precedence from low to high, and we have it high to low
+  // (as in [Yacc](http://dinosaur.compilertools.net/yacc/index.html)).
   exports.parser = new Parser({
-    tokens: tokens,
-    bnf: bnf,
+    tokens: tokens.join(' '),
+    bnf: grammar,
     operators: operators.reverse(),
     startSymbol: 'Root'
-  }, {
-    debug: false
   });
-})();
+})();

lib/lexer.js

@@ -1,38 +1,582 @@
 (function(){
-  var ACCESSORS, ASSIGNMENT, BEFORE_WHEN, CALLABLE, CODE, COFFEE_KEYWORDS, COMMENT, COMMENT_CLEANER, HEREDOC, HEREDOC_INDENT, IDENTIFIER, JS, JS_CLEANER, JS_FORBIDDEN, JS_KEYWORDS, KEYWORDS, LAST_DENT, LAST_DENTS, MULTILINER, MULTI_DENT, NOT_REGEX, NO_NEWLINE, NUMBER, OPERATOR, REGEX, RESERVED, Rewriter, STRING, STRING_NEWLINES, WHITESPACE, lex;
+  var ACCESSORS, ASSIGNMENT, BEFORE_WHEN, CALLABLE, CODE, COFFEE_KEYWORDS, COMMENT, COMMENT_CLEANER, HEREDOC, HEREDOC_INDENT, IDENTIFIER, INTERPOLATION, JS_CLEANER, JS_FORBIDDEN, JS_KEYWORDS, KEYWORDS, LAST_DENT, LAST_DENTS, Lexer, MULTILINER, MULTI_DENT, NOT_REGEX, NO_NEWLINE, NUMBER, OPERATOR, REGEX, RESERVED, Rewriter, STRING_NEWLINES, WHITESPACE, compact, count, include, starts;
+  // The CoffeeScript Lexer. Uses a series of token-matching regexes to attempt
+  // matches against the beginning of the source code. When a match is found,
+  // a token is produced, we consume the match, and start again. Tokens are in the
+  // form:
+  //     [tag, value, line_number]
+  // Which is a format that can be fed directly into [Jison](http://github.com/zaach/jison).
+  // Set up the Lexer for both Node.js and the browser, depending on where we are.
   if ((typeof process !== "undefined" && process !== null)) {
     Rewriter = require('./rewriter').Rewriter;
   } else {
     this.exports = this;
     Rewriter = this.Rewriter;
   }
-  // The lexer reads a stream of CoffeeScript and divvys it up into tagged
-  // tokens. A minor bit of the ambiguity in the grammar has been avoided by
+  // The Lexer Class
+  // ---------------
+  // The Lexer class reads a stream of CoffeeScript and divvys it up into tagged
+  // tokens. Some potential ambiguity in the grammar has been avoided by
   // pushing some extra smarts into the Lexer.
-  exports.Lexer = (lex = function lex() {  });
-  // Constants ============================================================
-  // Keywords that CoffeScript shares in common with JS.
-  JS_KEYWORDS = ["if", "else", "true", "false", "new", "return", "try", "catch", "finally", "throw", "break", "continue", "for", "in", "while", "delete", "instanceof", "typeof", "switch", "super", "extends"];
-  // CoffeeScript-only keywords -- which we're more relaxed about allowing.
+  exports.Lexer = (function() {
+    Lexer = function Lexer() {    };
+    // **tokenize** is the Lexer's main method. Scan by attempting to match tokens
+    // one at a time, using a regular expression anchored at the start of the
+    // remaining code, or a custom recursive token-matching method
+    // (for interpolations). When the next token has been recorded, we move forward
+    // within the code past the token, and begin again.
+    // Each tokenizing method is responsible for incrementing `@i` by the number of
+    // characters it has consumed. `@i` can be thought of as our finger on the page
+    // of source.
+    // Before returning the token stream, run it through the [Rewriter](rewriter.html)
+    // unless explicitly asked not to.
+    Lexer.prototype.tokenize = function tokenize(code, options) {
+      var o;
+      o = options || {};
+      this.code = code;
+      // The remainder of the source code.
+      this.i = 0;
+      // Current character position we're parsing.
+      this.line = o.line || 0;
+      // The current line.
+      this.indent = 0;
+      // The current indentation level.
+      this.indents = [];
+      // The stack of all current indentation levels.
+      this.tokens = [];
+      // Stream of parsed tokens in the form ['TYPE', value, line]
+      while (this.i < this.code.length) {
+        this.chunk = this.code.slice(this.i);
+        this.extract_next_token();
+      }
+      this.close_indentation();
+      if (o.rewrite === false) {
+        return this.tokens;
+      }
+      return (new Rewriter()).rewrite(this.tokens);
+    };
+    // At every position, run through this list of attempted matches,
+    // short-circuiting if any of them succeed. Their order determines precedence:
+    // `@literal_token` is the fallback catch-all.
+    Lexer.prototype.extract_next_token = function extract_next_token() {
+      if (this.identifier_token()) {
+        return null;
+      }
+      if (this.number_token()) {
+        return null;
+      }
+      if (this.heredoc_token()) {
+        return null;
+      }
+      if (this.regex_token()) {
+        return null;
+      }
+      if (this.comment_token()) {
+        return null;
+      }
+      if (this.line_token()) {
+        return null;
+      }
+      if (this.whitespace_token()) {
+        return null;
+      }
+      if (this.js_token()) {
+        return null;
+      }
+      if (this.string_token()) {
+        return null;
+      }
+      return this.literal_token();
+    };
+    // Tokenizers
+    // ----------
+    // Matches identifying literals: variables, keywords, method names, etc.
+    // Check to ensure that JavaScript reserved words aren't being used as
+    // identifiers. Because CoffeeScript reserves a handful of keywords that are
+    // allowed in JavaScript, we're careful not to tag them as keywords when
+    // referenced as property names here, so you can still do `jQuery.is()` even
+    // though `is` means `===` otherwise.
+    Lexer.prototype.identifier_token = function identifier_token() {
+      var id, tag;
+      if (!((id = this.match(IDENTIFIER, 1)))) {
+        return false;
+      }
+      this.name_access_type();
+      tag = 'IDENTIFIER';
+      if (include(KEYWORDS, id) && !(include(ACCESSORS, this.tag(0)) && !this.prev().spaced)) {
+        tag = id.toUpperCase();
+      }
+      if (include(RESERVED, id)) {
+        this.identifier_error(id);
+      }
+      if (tag === 'WHEN' && include(BEFORE_WHEN, this.tag())) {
+        tag = 'LEADING_WHEN';
+      }
+      this.token(tag, id);
+      this.i += id.length;
+      return true;
+    };
+    // Matches numbers, including decimals, hex, and exponential notation.
+    Lexer.prototype.number_token = function number_token() {
+      var number;
+      if (!((number = this.match(NUMBER, 1)))) {
+        return false;
+      }
+      this.token('NUMBER', number);
+      this.i += number.length;
+      return true;
+    };
+    // Matches strings, including multi-line strings. Ensures that quotation marks
+    // are balanced within the string's contents, and within nested interpolations.
+    Lexer.prototype.string_token = function string_token() {
+      var string;
+      if (!(starts(this.chunk, '"') || starts(this.chunk, "'"))) {
+        return false;
+      }
+      string = this.balanced_token(['"', '"'], ['${', '}']);
+      if (!(string)) {
+        string = this.balanced_token(["'", "'"]);
+      }
+      if (!(string)) {
+        return false;
+      }
+      this.interpolate_string(string.replace(STRING_NEWLINES, " \\\n"));
+      this.line += count(string, "\n");
+      this.i += string.length;
+      return true;
+    };
+    // Matches heredocs, adjusting indentation to the correct level, as heredocs
+    // preserve whitespace, but ignore indentation to the left.
+    Lexer.prototype.heredoc_token = function heredoc_token() {
+      var doc, match;
+      if (!((match = this.chunk.match(HEREDOC)))) {
+        return false;
+      }
+      doc = this.sanitize_heredoc(match[2] || match[4]);
+      this.token('STRING', "\"" + doc + "\"");
+      this.line += count(match[1], "\n");
+      this.i += match[1].length;
+      return true;
+    };
+    // Matches JavaScript interpolated directly into the source via backticks.
+    Lexer.prototype.js_token = function js_token() {
+      var script;
+      if (!(starts(this.chunk, '`'))) {
+        return false;
+      }
+      if (!((script = this.balanced_token(['`', '`'])))) {
+        return false;
+      }
+      this.token('JS', script.replace(JS_CLEANER, ''));
+      this.i += script.length;
+      return true;
+    };
+    // Matches regular expression literals. Lexing regular expressions is difficult
+    // to distinguish from division, so we borrow some basic heuristics from
+    // JavaScript and Ruby.
+    Lexer.prototype.regex_token = function regex_token() {
+      var regex;
+      if (!((regex = this.match(REGEX, 1)))) {
+        return false;
+      }
+      if (include(NOT_REGEX, this.tag())) {
+        return false;
+      }
+      this.token('REGEX', regex);
+      this.i += regex.length;
+      return true;
+    };
+    // Matches a token in which which the passed delimiter pairs must be correctly
+    // balanced (ie. strings, JS literals).
+    Lexer.prototype.balanced_token = function balanced_token() {
+      var delimited;
+      delimited = Array.prototype.slice.call(arguments, 0);
+      return this.balanced_string.apply(this, [this.chunk].concat(delimited));
+    };
+    // Matches and conumes comments. We pass through comments into JavaScript,
+    // so they're treated as real tokens, like any other part of the language.
+    Lexer.prototype.comment_token = function comment_token() {
+      var comment, lines;
+      if (!((comment = this.match(COMMENT, 1)))) {
+        return false;
+      }
+      this.line += (comment.match(MULTILINER) || []).length;
+      lines = comment.replace(COMMENT_CLEANER, '').split(MULTILINER);
+      this.token('COMMENT', compact(lines));
+      this.token('TERMINATOR', "\n");
+      this.i += comment.length;
+      return true;
+    };
+    // Matches newlines, indents, and outdents, and determines which is which.
+    // If we can detect that the current line is continued onto the the next line,
+    // then the newline is suppressed:
+    //     elements
+    //       .each( ... )
+    //       .map( ... )
+    // Keeps track of the level of indentation, because a single outdent token
+    // can close multiple indents, so we need to know how far in we happen to be.
+    Lexer.prototype.line_token = function line_token() {
+      var diff, indent, next_character, no_newlines, prev, size;
+      if (!((indent = this.match(MULTI_DENT, 1)))) {
+        return false;
+      }
+      this.line += indent.match(MULTILINER).length;
+      this.i += indent.length;
+      prev = this.prev(2);
+      size = indent.match(LAST_DENTS).reverse()[0].match(LAST_DENT)[1].length;
+      next_character = this.chunk.match(MULTI_DENT)[4];
+      no_newlines = next_character === '.' || (this.value() && this.value().match(NO_NEWLINE) && prev && (prev[0] !== '.') && !this.value().match(CODE));
+      if (size === this.indent) {
+        if (no_newlines) {
+          return this.suppress_newlines();
+        }
+        return this.newline_token(indent);
+      } else if (size > this.indent) {
+        if (no_newlines) {
+          return this.suppress_newlines();
+        }
+        diff = size - this.indent;
+        this.token('INDENT', diff);
+        this.indents.push(diff);
+      } else {
+        this.outdent_token(this.indent - size, no_newlines);
+      }
+      this.indent = size;
+      return true;
+    };
+    // Record an outdent token or multiple tokens, if we happen to be moving back
+    // inwards past several recorded indents.
+    Lexer.prototype.outdent_token = function outdent_token(move_out, no_newlines) {
+      var last_indent;
+      while (move_out > 0 && this.indents.length) {
+        last_indent = this.indents.pop();
+        this.token('OUTDENT', last_indent);
+        move_out -= last_indent;
+      }
+      if (!(this.tag() === 'TERMINATOR' || no_newlines)) {
+        this.token('TERMINATOR', "\n");
+      }
+      return true;
+    };
+    // Matches and consumes non-meaningful whitespace. Tag the previous token
+    // as being "spaced", because there are some cases where it makes a difference.
+    Lexer.prototype.whitespace_token = function whitespace_token() {
+      var prev, space;
+      if (!((space = this.match(WHITESPACE, 1)))) {
+        return false;
+      }
+      prev = this.prev();
+      if (prev) {
+        prev.spaced = true;
+      }
+      this.i += space.length;
+      return true;
+    };
+    // Generate a newline token. Consecutive newlines get merged together.
+    Lexer.prototype.newline_token = function newline_token(newlines) {
+      if (!(this.tag() === 'TERMINATOR')) {
+        this.token('TERMINATOR', "\n");
+      }
+      return true;
+    };
+    // Use a `\` at a line-ending to suppress the newline.
+    // The slash is removed here once its job is done.
+    Lexer.prototype.suppress_newlines = function suppress_newlines() {
+      if (this.value() === "\\") {
+        this.tokens.pop();
+      }
+      return true;
+    };
+    // We treat all other single characters as a token. Eg.: `( ) , . !`
+    // Multi-character operators are also literal tokens, so that Jison can assign
+    // the proper order of operations. There are some symbols that we tag specially
+    // here. `;` and newlines are both treated as a `TERMINATOR`, we distinguish
+    // parentheses that indicate a method call from regular parentheses, and so on.
+    Lexer.prototype.literal_token = function literal_token() {
+      var match, not_spaced, tag, value;
+      match = this.chunk.match(OPERATOR);
+      value = match && match[1];
+      if (value && value.match(CODE)) {
+        this.tag_parameters();
+      }
+      value = value || this.chunk.substr(0, 1);
+      not_spaced = !this.prev() || !this.prev().spaced;
+      tag = value;
+      if (value.match(ASSIGNMENT)) {
+        tag = 'ASSIGN';
+        if (include(JS_FORBIDDEN, this.value)) {
+          this.assignment_error();
+        }
+      } else if (value === ';') {
+        tag = 'TERMINATOR';
+      } else if (value === '[' && this.tag() === '?' && not_spaced) {
+        tag = 'SOAKED_INDEX_START';
+        this.soaked_index = true;
+        this.tokens.pop();
+      } else if (value === ']' && this.soaked_index) {
+        tag = 'SOAKED_INDEX_END';
+        this.soaked_index = false;
+      } else if (include(CALLABLE, this.tag()) && not_spaced) {
+        if (value === '(') {
+          tag = 'CALL_START';
+        }
+        if (value === '[') {
+          tag = 'INDEX_START';
+        }
+      }
+      this.token(tag, value);
+      this.i += value.length;
+      return true;
+    };
+    // Token Manipulators
+    // ------------------
+    // As we consume a new `IDENTIFIER`, look at the previous token to determine
+    // if it's a special kind of accessor.
+    Lexer.prototype.name_access_type = function name_access_type() {
+      if (this.value() === '::') {
+        this.tag(1, 'PROTOTYPE_ACCESS');
+      }
+      if (this.value() === '.' && !(this.value(2) === '.')) {
+        if (this.tag(2) === '?') {
+          this.tag(1, 'SOAK_ACCESS');
+          return this.tokens.splice(-2, 1);
+        } else {
+          return this.tag(1, 'PROPERTY_ACCESS');
+        }
+      }
+    };
+    // Sanitize a heredoc by escaping internal double quotes and erasing all
+    // external indentation on the left-hand side.
+    Lexer.prototype.sanitize_heredoc = function sanitize_heredoc(doc) {
+      var indent;
+      indent = (doc.match(HEREDOC_INDENT) || ['']).sort()[0];
+      return doc.replace(new RegExp("^" + indent, 'gm'), '').replace(MULTILINER, "\\n").replace(/"/g, '\\"');
+    };
+    // A source of ambiguity in our grammar used to be parameter lists in function
+    // definitions versus argument lists in function calls. Walk backwards, tagging
+    // parameters specially in order to make things easier for the parser.
+    Lexer.prototype.tag_parameters = function tag_parameters() {
+      var _a, i, tok;
+      if (this.tag() !== ')') {
+        return null;
+      }
+      i = 0;
+      while (true) {
+        i += 1;
+        tok = this.prev(i);
+        if (!tok) {
+          return null;
+        }
+        if ((_a = tok[0]) === 'IDENTIFIER') {
+          tok[0] = 'PARAM';
+        } else if (_a === ')') {
+          tok[0] = 'PARAM_END';
+        } else if (_a === '(') {
+          return (tok[0] = 'PARAM_START');
+        }
+      }
+      return true;
+    };
+    // Close up all remaining open blocks at the end of the file.
+    Lexer.prototype.close_indentation = function close_indentation() {
+      return this.outdent_token(this.indent);
+    };
+    // The error for when you try to use a forbidden word in JavaScript as
+    // an identifier.
+    Lexer.prototype.identifier_error = function identifier_error(word) {
+      throw new Error("SyntaxError: Reserved word \"" + word + "\" on line " + (this.line + 1));
+    };
+    // The error for when you try to assign to a reserved word in JavaScript,
+    // like "function" or "default".
+    Lexer.prototype.assignment_error = function assignment_error() {
+      throw new Error("SyntaxError: Reserved word \"" + (this.value()) + "\" on line " + (this.line + 1) + " can't be assigned");
+    };
+    // Matches a balanced group such as a single or double-quoted string. Pass in
+    // a series of delimiters, all of which must be nested correctly within the
+    // contents of the string. This method allows us to have strings within
+    // interpolations within strings etc...
+    Lexer.prototype.balanced_string = function balanced_string(str) {
+      var _a, _b, _c, _d, close, delimited, i, levels, open, pair;
+      delimited = Array.prototype.slice.call(arguments, 1);
+      levels = [];
+      i = 0;
+      while (i < str.length) {
+        _a = delimited;
+        for (_b = 0, _c = _a.length; _b < _c; _b++) {
+          pair = _a[_b];
+          _d = pair;
+          open = _d[0];
+          close = _d[1];
+          if (levels.length && starts(str, '\\', i)) {
+            i += 1;
+            break;
+          } else if (levels.length && starts(str, close, i) && levels[levels.length - 1] === pair) {
+            levels.pop();
+            i += close.length - 1;
+            if (!(levels.length)) {
+              i += 1;
+            }
+            break;
+          } else if (starts(str, open, i)) {
+            levels.push(pair);
+            i += open.length - 1;
+            break;
+          }
+        }
+        if (!(levels.length)) {
+          break;
+        }
+        i += 1;
+      }
+      if (levels.length) {
+        throw new Error("SyntaxError: Unterminated " + (levels.pop()[0]) + " starting on line " + (this.line + 1));
+      }
+      if (i === 0) {
+        return false;
+      }
+      return str.substring(0, i);
+    };
+    // Expand variables and expressions inside double-quoted strings using
+    // [ECMA Harmony's interpolation syntax](http://wiki.ecmascript.org/doku.php?id=strawman:string_interpolation)
+    // for substitution of bare variables as well as arbitrary expressions.
+    //     "Hello $name."
+    //     "Hello ${name.capitalize()}."
+    // If it encounters an interpolation, this method will recursively create a
+    // new Lexer, tokenize the interpolated contents, and merge them into the
+    // token stream.
+    Lexer.prototype.interpolate_string = function interpolate_string(str) {
+      var _a, _b, _c, _d, _e, each, expr, group, i, inner, interp, lexer, match, nested, pi, quote, tokens;
+      if (str.length < 3 || !starts(str, '"')) {
+        return this.token('STRING', str);
+      } else {
+        lexer = new Lexer();
+        tokens = [];
+        quote = str.substring(0, 1);
+        _a = [1, 1];
+        i = _a[0];
+        pi = _a[1];
+        while (i < str.length - 1) {
+          if (starts(str, '\\', i)) {
+            i += 1;
+          } else if ((match = str.substring(i).match(INTERPOLATION))) {
+            _b = match;
+            group = _b[0];
+            interp = _b[1];
+            if (starts(interp, '@')) {
+              interp = "this." + (interp.substring(1));
+            }
+            if (pi < i) {
+              tokens.push(['STRING', quote + (str.substring(pi, i)) + quote]);
+            }
+            tokens.push(['IDENTIFIER', interp]);
+            i += group.length - 1;
+            pi = i + 1;
+          } else if (((expr = this.balanced_string(str.substring(i), ['${', '}'])))) {
+            if (pi < i) {
+              tokens.push(['STRING', quote + (str.substring(pi, i)) + quote]);
+            }
+            inner = expr.substring(2, expr.length - 1);
+            if (inner.length) {
+              nested = lexer.tokenize("(" + inner + ")", {
+                rewrite: false,
+                line: this.line
+              });
+              nested.pop();
+              tokens.push(['TOKENS', nested]);
+            } else {
+              tokens.push(['STRING', quote + quote]);
+            }
+            i += expr.length - 1;
+            pi = i + 1;
+          }
+          i += 1;
+        }
+        if (pi < i && pi < str.length - 1) {
+          tokens.push(['STRING', quote + (str.substring(pi, i)) + quote]);
+        }
+        _c = []; _d = tokens;
+        for (i = 0, _e = _d.length; i < _e; i++) {
+          each = _d[i];
+          _c.push((function() {
+            each[0] === 'TOKENS' ? (this.tokens = this.tokens.concat(each[1])) : this.token(each[0], each[1]);
+            if (i < tokens.length - 1) {
+              return this.token('+', '+');
+            }
+          }).call(this));
+        }
+        return _c;
+      }
+    };
+    // Helpers
+    // -------
+    // Add a token to the results, taking note of the line number.
+    Lexer.prototype.token = function token(tag, value) {
+      return this.tokens.push([tag, value, this.line]);
+    };
+    // Peek at a tag in the current token stream.
+    Lexer.prototype.tag = function tag(index, tag) {
+      var tok;
+      if (!((tok = this.prev(index)))) {
+        return null;
+      }
+      if ((typeof tag !== "undefined" && tag !== null)) {
+        return (tok[0] = tag);
+      }
+      return tok[0];
+    };
+    // Peek at a value in the current token stream.
+    Lexer.prototype.value = function value(index, val) {
+      var tok;
+      if (!((tok = this.prev(index)))) {
+        return null;
+      }
+      if ((typeof val !== "undefined" && val !== null)) {
+        return (tok[1] = val);
+      }
+      return tok[1];
+    };
+    // Peek at a previous token, entire.
+    Lexer.prototype.prev = function prev(index) {
+      return this.tokens[this.tokens.length - (index || 1)];
+    };
+    // Attempt to match a string against the current chunk, returning the indexed
+    // match if successful, and `false` otherwise.
+    Lexer.prototype.match = function match(regex, index) {
+      var m;
+      if (!((m = this.chunk.match(regex)))) {
+        return false;
+      }
+      return m ? m[index] : false;
+    };
+    return Lexer;
+  }).call(this);
+  // Constants
+  // ---------
+  // Keywords that CoffeeScript shares in common with JavaScript.
+  JS_KEYWORDS = ["if", "else", "true", "false", "new", "return", "try", "catch", "finally", "throw", "break", "continue", "for", "in", "while", "delete", "instanceof", "typeof", "switch", "super", "extends", "class"];
+  // CoffeeScript-only keywords, which we're more relaxed about allowing. They can't
+  // be used standalone, but you can reference them as an attached property.
   COFFEE_KEYWORDS = ["then", "unless", "yes", "no", "on", "off", "and", "or", "is", "isnt", "not", "of", "by", "where", "when"];
-  // The list of keywords passed verbatim to the parser.
+  // The combined list of keywords is the superset that gets passed verbatim to
+  // the parser.
   KEYWORDS = JS_KEYWORDS.concat(COFFEE_KEYWORDS);
-  // The list of keywords that are reserved by JavaScript, but not used, and aren't
-  // used by CoffeeScript. Using these will throw an error at compile time.
-  RESERVED = ["case", "default", "do", "function", "var", "void", "with", "class", "const", "let", "debugger", "enum", "export", "import", "native"];
-  // JavaScript keywords and reserved words together, excluding CoffeeScript ones.
+  // The list of keywords that are reserved by JavaScript, but not used, or are
+  // used by CoffeeScript internally. We throw an error when these are encountered,
+  // to avoid having a JavaScript error at runtime.
+  RESERVED = ["case", "default", "do", "function", "var", "void", "with", "const", "let", "debugger", "enum", "export", "import", "native", "__extends", "__hasProp"];
+  // The superset of both JavaScript keywords and reserved words, none of which may
+  // be used as identifiers or properties.
   JS_FORBIDDEN = JS_KEYWORDS.concat(RESERVED);
-  // Token matching regexes. (keep the IDENTIFIER regex in sync with AssignNode.)
+  // Token matching regexes.
   IDENTIFIER = /^([a-zA-Z$_](\w|\$)*)/;
   NUMBER = /^(\b((0(x|X)[0-9a-fA-F]+)|([0-9]+(\.[0-9]+)?(e[+\-]?[0-9]+)?)))\b/i;
-  STRING = /^(""|''|"([\s\S]*?)([^\\]|\\\\)"|'([\s\S]*?)([^\\]|\\\\)')/;
   HEREDOC = /^("{6}|'{6}|"{3}\n?([\s\S]*?)\n?([ \t]*)"{3}|'{3}\n?([\s\S]*?)\n?([ \t]*)'{3})/;
-  JS = /^(``|`([\s\S]*?)([^\\]|\\\\)`)/;
+  INTERPOLATION = /^\$([a-zA-Z_@]\w*(\.\w+)*)/;
   OPERATOR = /^([+\*&|\/\-%=<>:!?]+)/;
   WHITESPACE = /^([ \t]+)/;
   COMMENT = /^(((\n?[ \t]*)?#[^\n]*)+)/;
   CODE = /^((-|=)>)/;
-  REGEX = /^(\/(.*?)([^\\]|\\\\)\/[imgy]{0,4})/;
+  REGEX = /^(\/(\S.*?)?([^\\]|\\\\)\/[imgy]{0,4})/;
   MULTI_DENT = /^((\n([ \t]*))+)(\.)?/;
   LAST_DENTS = /\n([ \t]*)/g;
   LAST_DENT = /\n([ \t]*)/;
@@ -47,312 +591,43 @@
   // Tokens which a regular expression will never immediately follow, but which
   // a division operator might.
   // See: http://www.mozilla.org/js/language/js20-2002-04/rationale/syntax.html#regular-expressions
-  NOT_REGEX = ['IDENTIFIER', 'NUMBER', 'REGEX', 'STRING', ')', '++', '--', ']', '}', 'FALSE', 'NULL', 'TRUE'];
-  // Tokens which could legitimately be invoked or indexed.
+  // Our list is shorter, due to sans-parentheses method calls.
+  NOT_REGEX = ['NUMBER', 'REGEX', '++', '--', 'FALSE', 'NULL', 'TRUE'];
+  // Tokens which could legitimately be invoked or indexed. A opening
+  // parentheses or bracket following these tokens will be recorded as the start
+  // of a function invocation or indexing operation.
   CALLABLE = ['IDENTIFIER', 'SUPER', ')', ']', '}', 'STRING', '@'];
   // Tokens that indicate an access -- keywords immediately following will be
   // treated as identifiers.
   ACCESSORS = ['PROPERTY_ACCESS', 'PROTOTYPE_ACCESS', 'SOAK_ACCESS', '@'];
-  // Tokens that, when immediately preceding a 'WHEN', indicate that its leading.
+  // Tokens that, when immediately preceding a `WHEN`, indicate that the `WHEN`
+  // occurs at the start of a line. We disambiguate these from trailing whens to
+  // avoid an ambiguity in the grammar.
   BEFORE_WHEN = ['INDENT', 'OUTDENT', 'TERMINATOR'];
-  // Scan by attempting to match tokens one character at a time. Slow and steady.
-  lex.prototype.tokenize = function tokenize(code) {
-    this.code = code;
-    // Cleanup code by remove extra line breaks, TODO: chomp
-    this.i = 0;
-    // Current character position we're parsing
-    this.line = 1;
-    // The current line.
-    this.indent = 0;
-    // The current indent level.
-    this.indents = [];
-    // The stack of all indent levels we are currently within.
-    this.tokens = [];
-    // Collection of all parsed tokens in the form [:TOKEN_TYPE, value]
-    while (this.i < this.code.length) {
-      this.chunk = this.code.slice(this.i);
-      this.extract_next_token();
-    }
-    this.close_indentation();
-    return (new Rewriter()).rewrite(this.tokens);
+  // Utility Functions
+  // -----------------
+  // Does a list include a value?
+  include = function include(list, value) {
+    return list.indexOf(value) >= 0;
   };
-  // At every position, run through this list of attempted matches,
-  // short-circuiting if any of them succeed.
-  lex.prototype.extract_next_token = function extract_next_token() {
-    if (this.identifier_token()) {
-      return null;
-    }
-    if (this.number_token()) {
-      return null;
-    }
-    if (this.heredoc_token()) {
-      return null;
-    }
-    if (this.string_token()) {
-      return null;
-    }
-    if (this.js_token()) {
-      return null;
-    }
-    if (this.regex_token()) {
-      return null;
-    }
-    if (this.indent_token()) {
-      return null;
-    }
-    if (this.comment_token()) {
-      return null;
-    }
-    if (this.whitespace_token()) {
-      return null;
-    }
-    return this.literal_token();
+  // Peek at the beginning of a given string to see if it matches a sequence.
+  starts = function starts(string, literal, start) {
+    return string.substring(start, (start || 0) + literal.length) === literal;
   };
-  // Tokenizers ==========================================================
-  // Matches identifying literals: variables, keywords, method names, etc.
-  lex.prototype.identifier_token = function identifier_token() {
-    var id, tag;
-    if (!((id = this.match(IDENTIFIER, 1)))) {
-      return false;
-    }
-    if (this.value() === '::') {
-      this.tag(1, 'PROTOTYPE_ACCESS');
-    }
-    if (this.value() === '.' && !(this.value(2) === '.')) {
-      if (this.tag(2) === '?') {
-        this.tag(1, 'SOAK_ACCESS');
-        this.tokens.splice(-2, 1);
-      } else {
-        this.tag(1, 'PROPERTY_ACCESS');
+  // Trim out all falsy values from an array.
+  compact = function compact(array) {
+    var _a, _b, _c, _d, item;
+    _a = []; _b = array;
+    for (_c = 0, _d = _b.length; _c < _d; _c++) {
+      item = _b[_c];
+      if (item) {
+        _a.push(item);
       }
     }
-    tag = 'IDENTIFIER';
-    if (KEYWORDS.indexOf(id) >= 0 && !((ACCESSORS.indexOf(this.tag()) >= 0) && !this.prev().spaced)) {
-      tag = id.toUpperCase();
-    }
-    if (RESERVED.indexOf(id) >= 0) {
-      throw new Error('SyntaxError: Reserved word "' + id + '" on line ' + this.line);
-    }
-    if (tag === 'WHEN' && BEFORE_WHEN.indexOf(this.tag()) >= 0) {
-      tag = 'LEADING_WHEN';
-    }
-    this.token(tag, id);
-    this.i += id.length;
-    return true;
+    return _a;
   };
-  // Matches numbers, including decimals, hex, and exponential notation.
-  lex.prototype.number_token = function number_token() {
-    var number;
-    if (!((number = this.match(NUMBER, 1)))) {
-      return false;
-    }
-    this.token('NUMBER', number);
-    this.i += number.length;
-    return true;
-  };
-  // Matches strings, including multi-line strings.
-  lex.prototype.string_token = function string_token() {
-    var escaped, string;
-    if (!((string = this.match(STRING, 1)))) {
-      return false;
-    }
-    escaped = string.replace(STRING_NEWLINES, " \\\n");
-    this.token('STRING', escaped);
-    this.line += this.count(string, "\n");
-    this.i += string.length;
-    return true;
-  };
-  // Matches heredocs, adjusting indentation to the correct level.
-  lex.prototype.heredoc_token = function heredoc_token() {
-    var doc, indent, match;
-    if (!((match = this.chunk.match(HEREDOC)))) {
-      return false;
-    }
-    doc = match[2] || match[4];
-    indent = (doc.match(HEREDOC_INDENT) || ['']).sort()[0];
-    doc = doc.replace(new RegExp("^" + indent, 'gm'), '').replace(MULTILINER, "\\n").replace('"', '\\"');
-    this.token('STRING', '"' + doc + '"');
-    this.line += this.count(match[1], "\n");
-    this.i += match[1].length;
-    return true;
-  };
-  // Matches interpolated JavaScript.
-  lex.prototype.js_token = function js_token() {
-    var script;
-    if (!((script = this.match(JS, 1)))) {
-      return false;
-    }
-    this.token('JS', script.replace(JS_CLEANER, ''));
-    this.i += script.length;
-    return true;
-  };
-  // Matches regular expression literals.
-  lex.prototype.regex_token = function regex_token() {
-    var regex;
-    if (!((regex = this.match(REGEX, 1)))) {
-      return false;
-    }
-    if (NOT_REGEX.indexOf(this.tag()) >= 0) {
-      return false;
-    }
-    this.token('REGEX', regex);
-    this.i += regex.length;
-    return true;
-  };
-  // Matches and conumes comments.
-  lex.prototype.comment_token = function comment_token() {
-    var comment;
-    if (!((comment = this.match(COMMENT, 1)))) {
-      return false;
-    }
-    this.line += (comment.match(MULTILINER) || []).length;
-    this.token('COMMENT', comment.replace(COMMENT_CLEANER, '').split(MULTILINER));
-    this.token('TERMINATOR', "\n");
-    this.i += comment.length;
-    return true;
-  };
-  // Record tokens for indentation differing from the previous line.
-  lex.prototype.indent_token = function indent_token() {
-    var diff, indent, next_character, no_newlines, prev, size;
-    if (!((indent = this.match(MULTI_DENT, 1)))) {
-      return false;
-    }
-    this.line += indent.match(MULTILINER).length;
-    this.i += indent.length;
-    next_character = this.chunk.match(MULTI_DENT)[4];
-    prev = this.prev(2);
-    no_newlines = next_character === '.' || (this.value() && this.value().match(NO_NEWLINE) && prev && (prev[0] !== '.') && !this.value().match(CODE));
-    if (no_newlines) {
-      return this.suppress_newlines(indent);
-    }
-    size = indent.match(LAST_DENTS).reverse()[0].match(LAST_DENT)[1].length;
-    if (size === this.indent) {
-      return this.newline_token(indent);
-    }
-    if (size > this.indent) {
-      diff = size - this.indent;
-      this.token('INDENT', diff);
-      this.indents.push(diff);
-    } else {
-      this.outdent_token(this.indent - size);
-    }
-    this.indent = size;
-    return true;
-  };
-  // Record an oudent token or tokens, if we're moving back inwards past
-  // multiple recorded indents.
-  lex.prototype.outdent_token = function outdent_token(move_out) {
-    var last_indent;
-    while (move_out > 0 && this.indents.length) {
-      last_indent = this.indents.pop();
-      this.token('OUTDENT', last_indent);
-      move_out -= last_indent;
-    }
-    if (!(this.tag() === 'TERMINATOR')) {
-      this.token('TERMINATOR', "\n");
-    }
-    return true;
-  };
-  // Matches and consumes non-meaningful whitespace.
-  lex.prototype.whitespace_token = function whitespace_token() {
-    var prev, space;
-    if (!((space = this.match(WHITESPACE, 1)))) {
-      return false;
-    }
-    prev = this.prev();
-    if (prev) {
-      prev.spaced = true;
-    }
-    this.i += space.length;
-    return true;
-  };
-  // Multiple newlines get merged together.
-  // Use a trailing \ to escape newlines.
-  lex.prototype.newline_token = function newline_token(newlines) {
-    if (!(this.tag() === 'TERMINATOR')) {
-      this.token('TERMINATOR', "\n");
-    }
-    return true;
-  };
-  // Tokens to explicitly escape newlines are removed once their job is done.
-  lex.prototype.suppress_newlines = function suppress_newlines(newlines) {
-    if (this.value() === "\\") {
-      this.tokens.pop();
-    }
-    return true;
-  };
-  // We treat all other single characters as a token. Eg.: ( ) , . !
-  // Multi-character operators are also literal tokens, so that Racc can assign
-  // the proper order of operations.
-  lex.prototype.literal_token = function literal_token() {
-    var match, not_spaced, tag, value;
-    match = this.chunk.match(OPERATOR);
-    value = match && match[1];
-    if (value && value.match(CODE)) {
-      this.tag_parameters();
-    }
-    value = value || this.chunk.substr(0, 1);
-    not_spaced = !this.prev() || !this.prev().spaced;
-    tag = value;
-    if (value.match(ASSIGNMENT)) {
-      tag = 'ASSIGN';
-      if (JS_FORBIDDEN.indexOf(this.value()) >= 0) {
-        throw new Error('SyntaxError: Reserved word "' + this.value() + '" on line ' + this.line + ' can\'t be assigned');
-      }
-    } else if (value === ';') {
-      tag = 'TERMINATOR';
-    } else if (value === '[' && this.tag() === '?' && not_spaced) {
-      tag = 'SOAKED_INDEX_START';
-      this.soaked_index = true;
-      this.tokens.pop();
-    } else if (value === ']' && this.soaked_index) {
-      tag = 'SOAKED_INDEX_END';
-      this.soaked_index = false;
-    } else if (CALLABLE.indexOf(this.tag()) >= 0 && not_spaced) {
-      if (value === '(') {
-        tag = 'CALL_START';
-      }
-      if (value === '[') {
-        tag = 'INDEX_START';
-      }
-    }
-    this.token(tag, value);
-    this.i += value.length;
-    return true;
-  };
-  // Helpers =============================================================
-  // Add a token to the results, taking note of the line number.
-  lex.prototype.token = function token(tag, value) {
-    return this.tokens.push([tag, value, this.line]);
-  };
-  // Look at a tag in the current token stream.
-  lex.prototype.tag = function tag(index, tag) {
-    var tok;
-    if (!((tok = this.prev(index)))) {
-      return null;
-    }
-    if ((typeof tag !== "undefined" && tag !== null)) {
-      return (tok[0] = tag);
-    }
-    return tok[0];
-  };
-  // Look at a value in the current token stream.
-  lex.prototype.value = function value(index, val) {
-    var tok;
-    if (!((tok = this.prev(index)))) {
-      return null;
-    }
-    if ((typeof val !== "undefined" && val !== null)) {
-      return (tok[1] = val);
-    }
-    return tok[1];
-  };
-  // Look at a previous token.
-  lex.prototype.prev = function prev(index) {
-    return this.tokens[this.tokens.length - (index || 1)];
-  };
-  // Count the occurences of a character in a string.
-  lex.prototype.count = function count(string, letter) {
+  // Count the number of occurences of a character in a string.
+  count = function count(string, letter) {
     var num, pos;
     num = 0;
     pos = string.indexOf(letter);
@@ -362,44 +637,4 @@
     }
     return num;
   };
-  // Attempt to match a string against the current chunk, returning the indexed
-  // match.
-  lex.prototype.match = function match(regex, index) {
-    var m;
-    if (!((m = this.chunk.match(regex)))) {
-      return false;
-    }
-    return m ? m[index] : false;
-  };
-  // A source of ambiguity in our grammar was parameter lists in function
-  // definitions (as opposed to argument lists in function calls). Tag
-  // parameter identifiers in order to avoid this. Also, parameter lists can
-  // make use of splats.
-  lex.prototype.tag_parameters = function tag_parameters() {
-    var _a, i, tok;
-    if (this.tag() !== ')') {
-      return null;
-    }
-    i = 0;
-    while (true) {
-      i += 1;
-      tok = this.prev(i);
-      if (!tok) {
-        return null;
-      }
-      if ((_a = tok[0]) === 'IDENTIFIER') {
-        tok[0] = 'PARAM';
-      } else if (_a === ')') {
-        tok[0] = 'PARAM_END';
-      } else if (_a === '(') {
-        return (tok[0] = 'PARAM_START');
-      }
-    }
-    return true;
-  };
-  // Close up all remaining open blocks. IF the first token is an indent,
-  // axe it.
-  lex.prototype.close_indentation = function close_indentation() {
-    return this.outdent_token(this.indent);
-  };
-})();
+})();

lib/narwhal.js

@@ -1,44 +0,0 @@
-(function(){
-  var coffee, factories, file, loader, os, puts;
-  // The Narwhal-compatibility wrapper for CoffeeScript.
-  // Require external dependencies.
-  os = require('os');
-  file = require('file');
-  coffee = require('./coffee-script');
-  // Alias print to "puts", for Node.js compatibility:
-  puts = print;
-  // Compile a string of CoffeeScript into JavaScript.
-  exports.compile = function compile(source) {
-    return coffee.compile(source);
-  };
-  // Compile a given CoffeeScript file into JavaScript.
-  exports.compileFile = function compileFile(path) {
-    return coffee.compile(file.read(path));
-  };
-  // Make a factory for the CoffeeScript environment.
-  exports.makeNarwhalFactory = function makeNarwhalFactory(path) {
-    var code, factoryText;
-    code = exports.compileFile(path);
-    factoryText = "function(require,exports,module,system,print){" + code + "/**/\n}";
-    if (system.engine === "rhino") {
-      return Packages.org.mozilla.javascript.Context.getCurrentContext().compileFunction(global, factoryText, path, 0, null);
-    } else {
-      // eval requires parentheses, but parentheses break compileFunction.
-      return eval("(" + factoryText + ")");
-    }
-  };
-  // The Narwhal loader for '.coffee' files.
-  factories = {};
-  loader = {};
-  // Reload the coffee-script environment from source.
-  loader.reload = function reload(topId, path) {
-    return factories[topId] = function() {
-      return exports.makeNarwhalFactory(path);
-    };
-  };
-  // Ensure that the coffee-script environment is loaded.
-  loader.load = function load(topId, path) {
-    return factories[topId] = factories[topId] || this.reload(topId, path);
-  };
-  require.loader.loaders.unshift([".coffee", loader]);
-})();

lib/optparse.js

@@ -1,80 +1,90 @@
 (function(){
-  var LONG_FLAG, OPTIONAL, SHORT_FLAG, build_rule, build_rules, op, spaces;
-  // Create an OptionParser with a list of valid options.
-  op = (exports.OptionParser = function OptionParser(rules) {
-    this.banner = 'Usage: [Options]';
-    this.options_title = 'Available options:';
-    this.rules = build_rules(rules);
-    this.actions = {};
-    return this;
-  });
-  // Add a callback to fire when a particular option is encountered.
-  op.prototype.add = function add(value, callback) {
-    return this.actions[value] = callback;
-  };
-  // Parse the argument array, calling defined callbacks, returning the remaining non-option arguments.
-  op.prototype.parse = function parse(args) {
-    var _a, _b, arg, callback, is_option, results, rule, value;
-    results = [];
-    args = args.concat([]);
-    while (((arg = args.shift()))) {
-      is_option = false;
-      _a = this.rules;
-      for (_b = 0; _b < _a.length; _b++) {
-        rule = _a[_b];
-        if (rule.letter === arg || rule.flag === arg) {
-          callback = this.actions[rule.name];
-          value = rule.argument && args.shift();
-          if (callback) {
-            callback(value);
+  var LONG_FLAG, MULTI_FLAG, OPTIONAL, OptionParser, SHORT_FLAG, build_rule, build_rules, normalize_arguments;
+  // A simple **OptionParser** class to parse option flags from the command-line.
+  // Use it like so:
+  //     parser:  new OptionParser switches, help_banner
+  //     options: parser.parse process.argv
+  exports.OptionParser = (function() {
+    OptionParser = function OptionParser(rules, banner) {
+      this.banner = banner;
+      this.rules = build_rules(rules);
+      return this;
+    };
+    // Initialize with a list of valid options, in the form:
+    //     [short-flag, long-flag, description]
+    // Along with an an optional banner for the usage help.
+    // Parse the list of arguments, populating an `options` object with all of the
+    // specified options, and returning it. `options.arguments` will be an array
+    // containing the remaning non-option arguments. This is a simpler API than
+    // many option parsers that allow you to attach callback actions for every
+    // flag. Instead, you're responsible for interpreting the options object.
+    OptionParser.prototype.parse = function parse(args) {
+      var _a, _b, _c, arg, is_option, matched_rule, options, rule;
+      arguments = Array.prototype.slice.call(arguments, 0);
+      options = {
+        arguments: []
+      };
+      args = normalize_arguments(args);
+      while (arg = args.shift()) {
+        is_option = !!(arg.match(LONG_FLAG) || arg.match(SHORT_FLAG));
+        matched_rule = false;
+        _a = this.rules;
+        for (_b = 0, _c = _a.length; _b < _c; _b++) {
+          rule = _a[_b];
+          if (rule.short_flag === arg || rule.long_flag === arg) {
+            options[rule.name] = rule.has_argument ? args.shift() : true;
+            matched_rule = true;
+            break;
           }
-          is_option = true;
-          break;
+        }
+        if (is_option && !matched_rule) {
+          throw new Error("unrecognized option: " + arg);
+        }
+        if (!(is_option)) {
+          options.arguments.push(arg);
         }
       }
-      if (!(is_option)) {
-        results.push(arg);
+      return options;
+    };
+    // Return the help text for this **OptionParser**, listing and describing all
+    // of the valid options, for `--help` and such.
+    OptionParser.prototype.help = function help() {
+      var _a, _b, _c, _d, _e, _f, _g, _h, i, let_part, lines, rule, spaces;
+      lines = ['Available options:'];
+      if (this.banner) {
+        lines.unshift(this.banner + "\n");
       }
-    }
-    return results;
-  };
-  // Return the help text for this OptionParser, for --help and such.
-  op.prototype.help = function help() {
-    var _a, _b, _c, _d, has_shorts, lines, longest, rule, text;
-    longest = 0;
-    has_shorts = false;
-    lines = [this.banner, '', this.options_title];
-    _a = this.rules;
-    for (_b = 0; _b < _a.length; _b++) {
-      rule = _a[_b];
-      if (rule.letter) {
-        has_shorts = true;
+      _a = this.rules;
+      for (_b = 0, _c = _a.length; _b < _c; _b++) {
+        rule = _a[_b];
+        spaces = 15 - rule.long_flag.length;
+        spaces = spaces > 0 ? (function() {
+          _d = []; _g = 0; _h = spaces;
+          for (_f = 0, i = _g; (_g <= _h ? i <= _h : i >= _h); (_g <= _h ? i += 1 : i -= 1), _f++) {
+            _d.push(' ');
+          }
+          return _d;
+        }).call(this).join('') : '';
+        let_part = rule.short_flag ? rule.short_flag + ', ' : '    ';
+        lines.push("  " + let_part + (rule.long_flag) + spaces + (rule.description));
       }
-      if (rule.flag.length > longest) {
-        longest = rule.flag.length;
-      }
-    }
-    _c = this.rules;
-    for (_d = 0; _d < _c.length; _d++) {
-      rule = _c[_d];
-      has_shorts ? (text = rule.letter ? spaces(2) + rule.letter + ', ' : spaces(6)) : null;
-      text += spaces(longest, rule.flag) + spaces(3);
-      text += rule.description;
-      lines.push(text);
-    }
-    return lines.join('\n');
-  };
-  // Private:
+      return "\n" + (lines.join('\n')) + "\n";
+    };
+    return OptionParser;
+  }).call(this);
+  // Helpers
+  // -------
   // Regex matchers for option flags.
-  LONG_FLAG = /^(--[\w\-]+)/;
-  SHORT_FLAG = /^(-\w+)/;
+  LONG_FLAG = /^(--\w[\w\-]+)/;
+  SHORT_FLAG = /^(-\w)/;
+  MULTI_FLAG = /^-(\w{2,})/;
   OPTIONAL = /\[(.+)\]/;
-  // Build rules from a list of valid switch tuples in the form:
-  // [letter-flag, long-flag, help], or [long-flag, help].
+  // Build and return the list of option rules. If the optional *short-flag* is
+  // unspecified, leave it out by padding with `null`.
   build_rules = function build_rules(rules) {
-    var _a, _b, _c, tuple;
+    var _a, _b, _c, _d, tuple;
     _a = []; _b = rules;
-    for (_c = 0; _c < _b.length; _c++) {
+    for (_c = 0, _d = _b.length; _c < _d; _c++) {
       tuple = _b[_c];
       _a.push((function() {
         if (tuple.length < 3) {
@@ -85,33 +95,39 @@
     }
     return _a;
   };
-  // Build a rule from a short-letter-flag, long-form-flag, and help text.
-  build_rule = function build_rule(letter, flag, description) {
+  // Build a rule from a `-o` short flag, a `--output [DIR]` long flag, and the
+  // description of what the option does.
+  build_rule = function build_rule(short_flag, long_flag, description) {
     var match;
-    match = flag.match(OPTIONAL);
-    flag = flag.match(LONG_FLAG)[1];
+    match = long_flag.match(OPTIONAL);
+    long_flag = long_flag.match(LONG_FLAG)[1];
     return {
-      name: flag.substr(2),
-      letter: letter,
-      flag: flag,
+      name: long_flag.substr(2),
+      short_flag: short_flag,
+      long_flag: long_flag,
       description: description,
-      argument: !!(match && match[1])
+      has_argument: !!(match && match[1])
     };
   };
-  // Space-pad a string with the specified number of characters.
-  spaces = function spaces(num, text) {
-    var builder;
-    builder = [];
-    if (text) {
-      if (text.length >= num) {
-        return text;
+  // Normalize arguments by expanding merged flags into multiple flags. This allows
+  // you to have `-wl` be the same as `--watch --lint`.
+  normalize_arguments = function normalize_arguments(args) {
+    var _a, _b, _c, _d, _e, _f, arg, l, match, result;
+    args = args.slice(0);
+    result = [];
+    _a = args;
+    for (_b = 0, _c = _a.length; _b < _c; _b++) {
+      arg = _a[_b];
+      if ((match = arg.match(MULTI_FLAG))) {
+        _d = match[1].split('');
+        for (_e = 0, _f = _d.length; _e < _f; _e++) {
+          l = _d[_e];
+          result.push('-' + l);
+        }
+      } else {
+        result.push(arg);
       }
-      num -= text.length;
-      builder.push(text);
     }
-    while (num -= 1) {
-      builder.push(' ');
-    }
-    return builder.join('');
+    return result;
   };
-})();
+})();

lib/repl.js

@@ -1,22 +1,30 @@
 (function(){
-  var coffee, prompt, quit, readline;
-  // A CoffeeScript port/version of the Node.js REPL.
-  // Required modules.
-  coffee = require('coffee-script');
-  // Shortcut variables.
+  var CoffeeScript, prompt, run;
+  // A very simple Read-Eval-Print-Loop. Compiles one line at a time to JavaScript
+  // and evaluates it. Good for simple tests, or poking around the **Node.js** API.
+  // Using it looks like this:
+  //     coffee> puts "$num bottles of beer" for num in [99..1]
+  // Require the **coffee-script** module to get access to the compiler.
+  CoffeeScript = require('coffee-script');
+  // Our prompt.
   prompt = 'coffee> ';
-  quit = function quit() {
-    return process.exit(0);
-  };
-  // The main REPL function. Called everytime a line of code is entered.
-  // Attempt to evaluate the command. If there's an exception, print it.
-  readline = function readline(code) {
+  // Quick alias for quitting the REPL.
+  process.mixin({
+    quit: function quit() {
+      return process.exit(0);
+    }
+  });
+  // The main REPL function. **run** is called every time a line of code is entered.
+  // Attempt to evaluate the command. If there's an exception, print it out instead
+  // of exiting.
+  run = function run(code) {
     var val;
     try {
-      val = eval(coffee.compile(code, {
+      val = CoffeeScript.run(code, {
         no_wrap: true,
-        globals: true
-      }));
+        globals: true,
+        source: 'repl'
+      });
       if (val !== undefined) {
         p(val);
       }
@@ -25,8 +33,8 @@
     }
     return print(prompt);
   };
-  // Start up the REPL.
-  process.stdio.addListener('data', readline);
+  // Start up the REPL by opening **stdio** and listening for input.
+  process.stdio.addListener('data', run);
   process.stdio.open();
   print(prompt);
-})();
+})();

lib/rewriter.js

@@ -1,383 +1,383 @@
 (function(){
-  var BALANCED_PAIRS, EXPRESSION_CLOSE, EXPRESSION_START, EXPRESSION_TAIL, IMPLICIT_BLOCK, IMPLICIT_CALL, IMPLICIT_END, IMPLICIT_FUNC, INVERSES, SINGLE_CLOSERS, SINGLE_LINERS, _a, _b, _c, _d, _e, _f, _g, _h, pair, re;
+  var BALANCED_PAIRS, EXPRESSION_CLOSE, EXPRESSION_END, EXPRESSION_START, IMPLICIT_BLOCK, IMPLICIT_CALL, IMPLICIT_END, IMPLICIT_FUNC, INVERSES, Rewriter, SINGLE_CLOSERS, SINGLE_LINERS, _a, _b, _c, _d, _e, _f, _g, _h, _i, _j, _k, include, pair;
   var __hasProp = Object.prototype.hasOwnProperty;
+  // The CoffeeScript language has a decent amount of optional syntax,
+  // implicit syntax, and shorthand syntax. These things can greatly complicate a
+  // grammar and bloat the resulting parse table. Instead of making the parser
+  // handle it all, we take a series of passes over the token stream,
+  // using this **Rewriter** to convert shorthand into the unambiguous long form,
+  // add implicit indentation and parentheses, balance incorrect nestings, and
+  // generally clean things up.
+  // Set up exported variables for both Node.js and the browser.
   if (!((typeof process !== "undefined" && process !== null))) {
     this.exports = this;
   }
-  // In order to keep the grammar simple, the stream of tokens that the Lexer
-  // emits is rewritten by the Rewriter, smoothing out ambiguities, mis-nested
-  // indentation, and single-line flavors of expressions.
-  exports.Rewriter = (re = function re() {  });
-  // Tokens that must be balanced.
-  BALANCED_PAIRS = [['(', ')'], ['[', ']'], ['{', '}'], ['INDENT', 'OUTDENT'], ['PARAM_START', 'PARAM_END'], ['CALL_START', 'CALL_END'], ['INDEX_START', 'INDEX_END'], ['SOAKED_INDEX_START', 'SOAKED_INDEX_END']];
-  // Tokens that signal the start of a balanced pair.
-  EXPRESSION_START = (function() {
-    _a = []; _b = BALANCED_PAIRS;
-    for (_c = 0; _c < _b.length; _c++) {
-      pair = _b[_c];
-      _a.push(pair[0]);
-    }
-    return _a;
-  }).call(this);
-  // Tokens that signal the end of a balanced pair.
-  EXPRESSION_TAIL = (function() {
-    _d = []; _e = BALANCED_PAIRS;
-    for (_f = 0; _f < _e.length; _f++) {
-      pair = _e[_f];
-      _d.push(pair[1]);
-    }
-    return _d;
-  }).call(this);
-  // Tokens that indicate the close of a clause of an expression.
-  EXPRESSION_CLOSE = ['CATCH', 'WHEN', 'ELSE', 'FINALLY'].concat(EXPRESSION_TAIL);
-  // Tokens pairs that, in immediate succession, indicate an implicit call.
-  IMPLICIT_FUNC = ['IDENTIFIER', 'SUPER', ')', 'CALL_END', ']', 'INDEX_END'];
-  IMPLICIT_BLOCK = ['->', '=>', '{', '[', ','];
-  IMPLICIT_END = ['IF', 'UNLESS', 'FOR', 'WHILE', 'TERMINATOR', 'INDENT', 'OUTDENT'];
-  IMPLICIT_CALL = ['IDENTIFIER', 'NUMBER', 'STRING', 'JS', 'REGEX', 'NEW', 'PARAM_START', 'TRY', 'DELETE', 'TYPEOF', 'SWITCH', 'TRUE', 'FALSE', 'YES', 'NO', 'ON', 'OFF', '!', '!!', 'NOT', '@', '->', '=>', '[', '(', '{'];
-  // The inverse mappings of token pairs we're trying to fix up.
-  INVERSES = {};
-  _g = BALANCED_PAIRS;
-  for (_h = 0; _h < _g.length; _h++) {
-    pair = _g[_h];
-    INVERSES[pair[0]] = pair[1];
-    INVERSES[pair[1]] = pair[0];
-  }
-  // Single-line flavors of block expressions that have unclosed endings.
-  // The grammar can't disambiguate them, so we insert the implicit indentation.
-  SINGLE_LINERS = ['ELSE', "->", "=>", 'TRY', 'FINALLY', 'THEN'];
-  SINGLE_CLOSERS = ['TERMINATOR', 'CATCH', 'FINALLY', 'ELSE', 'OUTDENT', 'LEADING_WHEN', 'PARAM_START'];
-  // Rewrite the token stream in multiple passes, one logical filter at
-  // a time. This could certainly be changed into a single pass through the
-  // stream, with a big ol' efficient switch, but it's much nicer like this.
-  re.prototype.rewrite = function rewrite(tokens) {
-    this.tokens = tokens;
-    this.adjust_comments();
-    this.remove_leading_newlines();
-    this.remove_mid_expression_newlines();
-    this.move_commas_outside_outdents();
-    this.close_open_calls_and_indexes();
-    this.add_implicit_indentation();
-    this.add_implicit_parentheses();
-    this.ensure_balance(BALANCED_PAIRS);
-    this.rewrite_closing_parens();
-    return this.tokens;
-  };
-  // Rewrite the token stream, looking one token ahead and behind.
-  // Allow the return value of the block to tell us how many tokens to move
-  // forwards (or backwards) in the stream, to make sure we don't miss anything
-  // as the stream changes length under our feet.
-  re.prototype.scan_tokens = function scan_tokens(block) {
-    var i, move;
-    i = 0;
-    while (true) {
-      if (!(this.tokens[i])) {
-        break;
+  // The **Rewriter** class is used by the [Lexer](lexer.html), directly against
+  // its internal array of tokens.
+  exports.Rewriter = (function() {
+    Rewriter = function Rewriter() {    };
+    // Rewrite the token stream in multiple passes, one logical filter at
+    // a time. This could certainly be changed into a single pass through the
+    // stream, with a big ol' efficient switch, but it's much nicer to work with
+    // like this. The order of these passes matters -- indentation must be
+    // corrected before implicit parentheses can be wrapped around blocks of code.
+    Rewriter.prototype.rewrite = function rewrite(tokens) {
+      this.tokens = tokens;
+      this.adjust_comments();
+      this.remove_leading_newlines();
+      this.remove_mid_expression_newlines();
+      this.close_open_calls_and_indexes();
+      this.add_implicit_indentation();
+      this.add_implicit_parentheses();
+      this.ensure_balance(BALANCED_PAIRS);
+      this.rewrite_closing_parens();
+      return this.tokens;
+    };
+    // Rewrite the token stream, looking one token ahead and behind.
+    // Allow the return value of the block to tell us how many tokens to move
+    // forwards (or backwards) in the stream, to make sure we don't miss anything
+    // as tokens are inserted and removed, and the stream changes length under
+    // our feet.
+    Rewriter.prototype.scan_tokens = function scan_tokens(block) {
+      var i, move;
+      i = 0;
+      while (true) {
+        if (!(this.tokens[i])) {
+          break;
+        }
+        move = block(this.tokens[i - 1], this.tokens[i], this.tokens[i + 1], i);
+        i += move;
       }
-      move = block(this.tokens[i - 1], this.tokens[i], this.tokens[i + 1], i);
-      i += move;
-    }
-    return true;
-  };
-  // Massage newlines and indentations so that comments don't have to be
-  // correctly indented, or appear on their own line.
-  re.prototype.adjust_comments = function adjust_comments() {
-    return this.scan_tokens((function(__this) {
-      var __func = function(prev, token, post, i) {
-        var after, before;
-        if (!(token[0] === 'COMMENT')) {
-          return 1;
-        }
-        before = this.tokens[i - 2];
-        after = this.tokens[i + 2];
-        if (before && after && ((before[0] === 'INDENT' && after[0] === 'OUTDENT') || (before[0] === 'OUTDENT' && after[0] === 'INDENT')) && before[1] === after[1]) {
-          this.tokens.splice(i + 2, 1);
-          this.tokens.splice(i - 2, 1);
-          return 0;
-        } else if (prev && prev[0] === 'TERMINATOR' && after && after[0] === 'INDENT') {
-          this.tokens.splice(i + 2, 1);
-          this.tokens[i - 1] = after;
-          return 1;
-        } else if (prev && prev[0] !== 'TERMINATOR' && prev[0] !== 'INDENT' && prev[0] !== 'OUTDENT') {
-          this.tokens.splice(i, 0, ['TERMINATOR', "\n", prev[2]]);
-          return 2;
-        } else {
-          return 1;
-        }
-      };
-      return (function() {
-        return __func.apply(__this, arguments);
-      });
-    })(this));
-  };
-  // Leading newlines would introduce an ambiguity in the grammar, so we
-  // dispatch them here.
-  re.prototype.remove_leading_newlines = function remove_leading_newlines() {
-    if (this.tokens[0][0] === 'TERMINATOR') {
-      return this.tokens.shift();
-    }
-  };
-  // Some blocks occur in the middle of expressions -- when we're expecting
-  // this, remove their trailing newlines.
-  re.prototype.remove_mid_expression_newlines = function remove_mid_expression_newlines() {
-    return this.scan_tokens((function(__this) {
-      var __func = function(prev, token, post, i) {
-        if (!(post && EXPRESSION_CLOSE.indexOf(post[0]) >= 0 && token[0] === 'TERMINATOR')) {
-          return 1;
-        }
-        this.tokens.splice(i, 1);
-        return 0;
-      };
-      return (function() {
-        return __func.apply(__this, arguments);
-      });
-    })(this));
-  };
-  // Make sure that we don't accidentally break trailing commas, which need
-  // to go on the outside of expression closers.
-  re.prototype.move_commas_outside_outdents = function move_commas_outside_outdents() {
-    return this.scan_tokens((function(__this) {
-      var __func = function(prev, token, post, i) {
-        if (token[0] === 'OUTDENT' && prev[0] === ',') {
-          this.tokens.splice(i, 1, token);
-        }
-        return 1;
-      };
-      return (function() {
-        return __func.apply(__this, arguments);
-      });
-    })(this));
-  };
-  // We've tagged the opening parenthesis of a method call, and the opening
-  // bracket of an indexing operation. Match them with their close.
-  re.prototype.close_open_calls_and_indexes = function close_open_calls_and_indexes() {
-    var brackets, parens;
-    parens = [0];
-    brackets = [0];
-    return this.scan_tokens((function(__this) {
-      var __func = function(prev, token, post, i) {
-        var _i;
-        if ((_i = token[0]) === 'CALL_START') {
-          parens.push(0);
-        } else if (_i === 'INDEX_START') {
-          brackets.push(0);
-        } else if (_i === '(') {
-          parens[parens.length - 1] += 1;
-        } else if (_i === '[') {
-          brackets[brackets.length - 1] += 1;
-        } else if (_i === ')') {
-          if (parens[parens.length - 1] === 0) {
-            parens.pop();
-            token[0] = 'CALL_END';
-          } else {
-            parens[parens.length - 1] -= 1;
-          }
-        } else if (_i === ']') {
-          if (brackets[brackets.length - 1] === 0) {
-            brackets.pop();
-            token[0] = 'INDEX_END';
-          } else {
-            brackets[brackets.length - 1] -= 1;
-          }
-        }
-        return 1;
-      };
-      return (function() {
-        return __func.apply(__this, arguments);
-      });
-    })(this));
-  };
-  // Methods may be optionally called without parentheses, for simple cases.
-  // Insert the implicit parentheses here, so that the parser doesn't have to
-  // deal with them.
-  re.prototype.add_implicit_parentheses = function add_implicit_parentheses() {
-    var stack;
-    stack = [0];
-    return this.scan_tokens((function(__this) {
-      var __func = function(prev, token, post, i) {
-        var _i, _j, _k, _l, idx, last, size, stack_pointer, tag, tmp;
-        tag = token[0];
-        if (tag === 'INDENT') {
-          stack.push(0);
-        }
-        if (tag === 'OUTDENT') {
-          last = stack.pop();
-          stack[stack.length - 1] += last;
-        }
-        if (IMPLICIT_END.indexOf(tag) >= 0 || !(typeof post !== "undefined" && post !== null)) {
-          if (tag === 'INDENT' && prev && IMPLICIT_BLOCK.indexOf(prev[0]) >= 0) {
+      return true;
+    };
+    // Massage newlines and indentations so that comments don't have to be
+    // correctly indented, or appear on a line of their own.
+    Rewriter.prototype.adjust_comments = function adjust_comments() {
+      return this.scan_tokens((function(__this) {
+        var __func = function(prev, token, post, i) {
+          var after;
+          if (!(token[0] === 'COMMENT')) {
             return 1;
           }
-          if (stack[stack.length - 1] > 0 || tag === 'INDENT') {
-            idx = tag === 'OUTDENT' ? i + 1 : i;
-            stack_pointer = tag === 'INDENT' ? 2 : 1;
-            _k = 0; _l = stack[stack.length - stack_pointer];
-            for (_j = 0, tmp=_k; (_k <= _l ? tmp < _l : tmp > _l); (_k <= _l ? tmp += 1 : tmp -= 1), _j++) {
-              this.tokens.splice(idx, 0, ['CALL_END', ')', token[2]]);
-            }
-            size = stack[stack.length - stack_pointer] + 1;
-            stack[stack.length - stack_pointer] = 0;
-            return size;
-          }
-        }
-        if (!(prev && IMPLICIT_FUNC.indexOf(prev[0]) >= 0 && IMPLICIT_CALL.indexOf(tag) >= 0)) {
-          return 1;
-        }
-        this.tokens.splice(i, 0, ['CALL_START', '(', token[2]]);
-        stack[stack.length - 1] += 1;
-        return 2;
-      };
-      return (function() {
-        return __func.apply(__this, arguments);
-      });
-    })(this));
-  };
-  // Because our grammar is LALR(1), it can't handle some single-line
-  // expressions that lack ending delimiters. Use the lexer to add the implicit
-  // blocks, so it doesn't need to.
-  // ')' can close a single-line block, but we need to make sure it's balanced.
-  re.prototype.add_implicit_indentation = function add_implicit_indentation() {
-    return this.scan_tokens((function(__this) {
-      var __func = function(prev, token, post, i) {
-        var idx, insertion, parens, starter, tok;
-        if (!(SINGLE_LINERS.indexOf(token[0]) >= 0 && post[0] !== 'INDENT' && !(token[0] === 'ELSE' && post[0] === 'IF'))) {
-          return 1;
-        }
-        starter = token[0];
-        this.tokens.splice(i + 1, 0, ['INDENT', 2, token[2]]);
-        idx = i + 1;
-        parens = 0;
-        while (true) {
-          idx += 1;
-          tok = this.tokens[idx];
-          if ((!tok || (SINGLE_CLOSERS.indexOf(tok[0]) >= 0 && tok[1] !== ';') || (tok[0] === ')' && parens === 0)) && !(starter === 'ELSE' && tok[0] === 'ELSE')) {
-            insertion = this.tokens[idx - 1][0] === "," ? idx - 1 : idx;
-            this.tokens.splice(insertion, 0, ['OUTDENT', 2, token[2]]);
-            break;
-          }
-          if (tok[0] === '(') {
-            parens += 1;
-          }
-          if (tok[0] === ')') {
-            parens -= 1;
-          }
-        }
-        if (!(token[0] === 'THEN')) {
-          return 1;
-        }
-        this.tokens.splice(i, 1);
-        return 0;
-      };
-      return (function() {
-        return __func.apply(__this, arguments);
-      });
-    })(this));
-  };
-  // Ensure that all listed pairs of tokens are correctly balanced throughout
-  // the course of the token stream.
-  re.prototype.ensure_balance = function ensure_balance(pairs) {
-    var _i, _j, key, levels, unclosed, value;
-    levels = {};
-    this.scan_tokens((function(__this) {
-      var __func = function(prev, token, post, i) {
-        var _i, _j, _k, close, open;
-        _i = pairs;
-        for (_j = 0; _j < _i.length; _j++) {
-          pair = _i[_j];
-          _k = pair;
-          open = _k[0];
-          close = _k[1];
-          levels[open] = levels[open] || 0;
-          if (token[0] === open) {
-            levels[open] += 1;
-          }
-          if (token[0] === close) {
-            levels[open] -= 1;
-          }
-          if (levels[open] < 0) {
-            throw new Error("too many " + token[1]);
-          }
-        }
-        return 1;
-      };
-      return (function() {
-        return __func.apply(__this, arguments);
-      });
-    })(this));
-    unclosed = (function() {
-      _i = []; _j = levels;
-      for (key in _j) { if (__hasProp.call(_j, key)) {
-        value = _j[key];
-        if (value > 0) {
-          _i.push(key);
-        }
-      }}
-      return _i;
-    }).call(this);
-    if (unclosed.length) {
-      throw new Error("unclosed " + unclosed[0]);
-    }
-  };
-  // We'd like to support syntax like this:
-  //    el.click((event) ->
-  //      el.hide())
-  // In order to accomplish this, move outdents that follow closing parens
-  // inwards, safely. The steps to accomplish this are:
-  //
-  // 1. Check that all paired tokens are balanced and in order.
-  // 2. Rewrite the stream with a stack: if you see an '(' or INDENT, add it
-  //    to the stack. If you see an ')' or OUTDENT, pop the stack and replace
-  //    it with the inverse of what we've just popped.
-  // 3. Keep track of "debt" for tokens that we fake, to make sure we end
-  //    up balanced in the end.
-  //
-  re.prototype.rewrite_closing_parens = function rewrite_closing_parens() {
-    var _i, debt, key, stack, val;
-    stack = [];
-    debt = {};
-    _i = INVERSES;
-    for (key in _i) { if (__hasProp.call(_i, key)) {
-      val = _i[key];
-      ((debt[key] = 0));
-    }}
-    return this.scan_tokens((function(__this) {
-      var __func = function(prev, token, post, i) {
-        var inv, match, mtag, tag;
-        tag = token[0];
-        inv = INVERSES[token[0]];
-        // Push openers onto the stack.
-        if (EXPRESSION_START.indexOf(tag) >= 0) {
-          stack.push(token);
-          return 1;
-          // The end of an expression, check stack and debt for a pair.
-        } else if (EXPRESSION_TAIL.indexOf(tag) >= 0) {
-          // If the tag is already in our debt, swallow it.
-          if (debt[inv] > 0) {
-            debt[inv] -= 1;
-            this.tokens.splice(i, 1);
-            return 0;
+          after = this.tokens[i + 2];
+          if (after && after[0] === 'INDENT') {
+            this.tokens.splice(i + 2, 1);
+            this.tokens.splice(i, 0, after);
+            return 1;
+          } else if (prev && prev[0] !== 'TERMINATOR' && prev[0] !== 'INDENT' && prev[0] !== 'OUTDENT') {
+            this.tokens.splice(i, 0, ['TERMINATOR', "\n", prev[2]]);
+            return 2;
           } else {
-            // Pop the stack of open delimiters.
-            match = stack.pop();
-            mtag = match[0];
-            // Continue onwards if it's the expected tag.
-            if (tag === INVERSES[mtag]) {
-              return 1;
+            return 1;
+          }
+        };
+        return (function() {
+          return __func.apply(__this, arguments);
+        });
+      })(this));
+    };
+    // Leading newlines would introduce an ambiguity in the grammar, so we
+    // dispatch them here.
+    Rewriter.prototype.remove_leading_newlines = function remove_leading_newlines() {
+      var _a;
+      _a = [];
+      while (this.tokens[0][0] === 'TERMINATOR') {
+        _a.push(this.tokens.shift());
+      }
+      return _a;
+    };
+    // Some blocks occur in the middle of expressions -- when we're expecting
+    // this, remove their trailing newlines.
+    Rewriter.prototype.remove_mid_expression_newlines = function remove_mid_expression_newlines() {
+      return this.scan_tokens((function(__this) {
+        var __func = function(prev, token, post, i) {
+          if (!(post && include(EXPRESSION_CLOSE, post[0]) && token[0] === 'TERMINATOR')) {
+            return 1;
+          }
+          this.tokens.splice(i, 1);
+          return 0;
+        };
+        return (function() {
+          return __func.apply(__this, arguments);
+        });
+      })(this));
+    };
+    // The lexer has tagged the opening parenthesis of a method call, and the
+    // opening bracket of an indexing operation. Match them with their paired
+    // close.
+    Rewriter.prototype.close_open_calls_and_indexes = function close_open_calls_and_indexes() {
+      var brackets, parens;
+      parens = [0];
+      brackets = [0];
+      return this.scan_tokens((function(__this) {
+        var __func = function(prev, token, post, i) {
+          var _a;
+          if ((_a = token[0]) === 'CALL_START') {
+            parens.push(0);
+          } else if (_a === 'INDEX_START') {
+            brackets.push(0);
+          } else if (_a === '(') {
+            parens[parens.length - 1] += 1;
+          } else if (_a === '[') {
+            brackets[brackets.length - 1] += 1;
+          } else if (_a === ')') {
+            if (parens[parens.length - 1] === 0) {
+              parens.pop();
+              token[0] = 'CALL_END';
             } else {
-              // Unexpected close, insert correct close, adding to the debt.
+              parens[parens.length - 1] -= 1;
+            }
+          } else if (_a === ']') {
+            if (brackets[brackets.length - 1] === 0) {
+              brackets.pop();
+              token[0] = 'INDEX_END';
+            } else {
+              brackets[brackets.length - 1] -= 1;
+            }
+          }
+          return 1;
+        };
+        return (function() {
+          return __func.apply(__this, arguments);
+        });
+      })(this));
+    };
+    // Methods may be optionally called without parentheses, for simple cases.
+    // Insert the implicit parentheses here, so that the parser doesn't have to
+    // deal with them.
+    Rewriter.prototype.add_implicit_parentheses = function add_implicit_parentheses() {
+      var stack;
+      stack = [0];
+      return this.scan_tokens((function(__this) {
+        var __func = function(prev, token, post, i) {
+          var _a, _b, _c, _d, idx, last, size, stack_pointer, tag, tmp;
+          tag = token[0];
+          if (tag === 'INDENT') {
+            stack.push(0);
+          }
+          if (tag === 'OUTDENT') {
+            last = stack.pop();
+            stack[stack.length - 1] += last;
+          }
+          if (!(typeof post !== "undefined" && post !== null) || include(IMPLICIT_END, tag)) {
+            if (tag === 'INDENT' && prev && include(IMPLICIT_BLOCK, prev[0])) {
+              return 1;
+            }
+            if (stack[stack.length - 1] > 0 || tag === 'INDENT') {
+              idx = tag === 'OUTDENT' ? i + 1 : i;
+              stack_pointer = tag === 'INDENT' ? 2 : 1;
+              _c = 0; _d = stack[stack.length - stack_pointer];
+              for (_b = 0, tmp = _c; (_c <= _d ? tmp < _d : tmp > _d); (_c <= _d ? tmp += 1 : tmp -= 1), _b++) {
+                this.tokens.splice(idx, 0, ['CALL_END', ')', token[2]]);
+              }
+              size = stack[stack.length - stack_pointer] + 1;
+              stack[stack.length - stack_pointer] = 0;
+              return size;
+            }
+          }
+          if (!(prev && include(IMPLICIT_FUNC, prev[0]) && include(IMPLICIT_CALL, tag))) {
+            return 1;
+          }
+          this.tokens.splice(i, 0, ['CALL_START', '(', token[2]]);
+          stack[stack.length - 1] += 1;
+          return 2;
+        };
+        return (function() {
+          return __func.apply(__this, arguments);
+        });
+      })(this));
+    };
+    // Because our grammar is LALR(1), it can't handle some single-line
+    // expressions that lack ending delimiters. The **Rewriter** adds the implicit
+    // blocks, so it doesn't need to. ')' can close a single-line block,
+    // but we need to make sure it's balanced.
+    Rewriter.prototype.add_implicit_indentation = function add_implicit_indentation() {
+      return this.scan_tokens((function(__this) {
+        var __func = function(prev, token, post, i) {
+          var idx, insertion, parens, pre, starter, tok;
+          if (!(include(SINGLE_LINERS, token[0]) && post[0] !== 'INDENT' && !(token[0] === 'ELSE' && post[0] === 'IF'))) {
+            return 1;
+          }
+          starter = token[0];
+          this.tokens.splice(i + 1, 0, ['INDENT', 2, token[2]]);
+          idx = i + 1;
+          parens = 0;
+          while (true) {
+            idx += 1;
+            tok = this.tokens[idx];
+            pre = this.tokens[idx - 1];
+            if ((!tok || (include(SINGLE_CLOSERS, tok[0]) && tok[1] !== ';') || (tok[0] === ')' && parens === 0)) && !(starter === 'ELSE' && tok[0] === 'ELSE')) {
+              insertion = pre[0] === "," ? idx - 1 : idx;
+              this.tokens.splice(insertion, 0, ['OUTDENT', 2, token[2]]);
+              break;
+            }
+            if (tok[0] === '(') {
+              parens += 1;
+            }
+            if (tok[0] === ')') {
+              parens -= 1;
+            }
+          }
+          if (!(token[0] === 'THEN')) {
+            return 1;
+          }
+          this.tokens.splice(i, 1);
+          return 0;
+        };
+        return (function() {
+          return __func.apply(__this, arguments);
+        });
+      })(this));
+    };
+    // Ensure that all listed pairs of tokens are correctly balanced throughout
+    // the course of the token stream.
+    Rewriter.prototype.ensure_balance = function ensure_balance(pairs) {
+      var _a, _b, key, levels, unclosed, value;
+      levels = {};
+      this.scan_tokens((function(__this) {
+        var __func = function(prev, token, post, i) {
+          var _a, _b, _c, _d, close, open, pair;
+          _a = pairs;
+          for (_b = 0, _c = _a.length; _b < _c; _b++) {
+            pair = _a[_b];
+            _d = pair;
+            open = _d[0];
+            close = _d[1];
+            levels[open] = levels[open] || 0;
+            if (token[0] === open) {
+              levels[open] += 1;
+            }
+            if (token[0] === close) {
+              levels[open] -= 1;
+            }
+            if (levels[open] < 0) {
+              throw new Error("too many " + (token[1]) + " on line " + (token[2] + 1));
+            }
+          }
+          return 1;
+        };
+        return (function() {
+          return __func.apply(__this, arguments);
+        });
+      })(this));
+      unclosed = (function() {
+        _a = []; _b = levels;
+        for (key in _b) { if (__hasProp.call(_b, key)) {
+          value = _b[key];
+          if (value > 0) {
+            _a.push(key);
+          }
+        }}
+        return _a;
+      }).call(this);
+      if (unclosed.length) {
+        throw new Error("unclosed " + (unclosed[0]));
+      }
+    };
+    // We'd like to support syntax like this:
+    //     el.click((event) ->
+    //       el.hide())
+    // In order to accomplish this, move outdents that follow closing parens
+    // inwards, safely. The steps to accomplish this are:
+    // 1. Check that all paired tokens are balanced and in order.
+    // 2. Rewrite the stream with a stack: if you see an '(' or INDENT, add it
+    //    to the stack. If you see an ')' or OUTDENT, pop the stack and replace
+    //    it with the inverse of what we've just popped.
+    // 3. Keep track of "debt" for tokens that we fake, to make sure we end
+    //    up balanced in the end.
+    Rewriter.prototype.rewrite_closing_parens = function rewrite_closing_parens() {
+      var _a, debt, key, stack, val;
+      stack = [];
+      debt = {};
+      _a = INVERSES;
+      for (key in _a) { if (__hasProp.call(_a, key)) {
+        val = _a[key];
+        ((debt[key] = 0));
+      }}
+      return this.scan_tokens((function(__this) {
+        var __func = function(prev, token, post, i) {
+          var inv, match, mtag, tag;
+          tag = token[0];
+          inv = INVERSES[token[0]];
+          if (include(EXPRESSION_START, tag)) {
+            stack.push(token);
+            return 1;
+          } else if (include(EXPRESSION_END, tag)) {
+            if (debt[inv] > 0) {
+              debt[inv] -= 1;
+              this.tokens.splice(i, 1);
+              return 0;
+            } else {
+              match = stack.pop();
+              mtag = match[0];
+              if (tag === INVERSES[mtag]) {
+                return 1;
+              }
               debt[mtag] += 1;
               val = mtag === 'INDENT' ? match[1] : INVERSES[mtag];
               this.tokens.splice(i, 0, [INVERSES[mtag], val]);
               return 1;
             }
+          } else {
+            return 1;
           }
-        } else {
-          return 1;
-        }
-      };
-      return (function() {
-        return __func.apply(__this, arguments);
-      });
-    })(this));
+        };
+        return (function() {
+          return __func.apply(__this, arguments);
+        });
+      })(this));
+    };
+    return Rewriter;
+  }).call(this);
+  // Constants
+  // ---------
+  // List of the token pairs that must be balanced.
+  BALANCED_PAIRS = [['(', ')'], ['[', ']'], ['{', '}'], ['INDENT', 'OUTDENT'], ['PARAM_START', 'PARAM_END'], ['CALL_START', 'CALL_END'], ['INDEX_START', 'INDEX_END'], ['SOAKED_INDEX_START', 'SOAKED_INDEX_END']];
+  // The inverse mappings of `BALANCED_PAIRS` we're trying to fix up, so we can
+  // look things up from either end.
+  INVERSES = {};
+  _a = BALANCED_PAIRS;
+  for (_b = 0, _c = _a.length; _b < _c; _b++) {
+    pair = _a[_b];
+    INVERSES[pair[0]] = pair[1];
+    INVERSES[pair[1]] = pair[0];
+  }
+  // The tokens that signal the start of a balanced pair.
+  EXPRESSION_START = (function() {
+    _d = []; _e = BALANCED_PAIRS;
+    for (_f = 0, _g = _e.length; _f < _g; _f++) {
+      pair = _e[_f];
+      _d.push(pair[0]);
+    }
+    return _d;
+  }).call(this);
+  // The tokens that signal the end of a balanced pair.
+  EXPRESSION_END = (function() {
+    _h = []; _i = BALANCED_PAIRS;
+    for (_j = 0, _k = _i.length; _j < _k; _j++) {
+      pair = _i[_j];
+      _h.push(pair[1]);
+    }
+    return _h;
+  }).call(this);
+  // Tokens that indicate the close of a clause of an expression.
+  EXPRESSION_CLOSE = ['CATCH', 'WHEN', 'ELSE', 'FINALLY'].concat(EXPRESSION_END);
+  // Tokens that, if followed by an `IMPLICIT_CALL`, indicate a function invocation.
+  IMPLICIT_FUNC = ['IDENTIFIER', 'SUPER', ')', 'CALL_END', ']', 'INDEX_END'];
+  // If preceded by an `IMPLICIT_FUNC`, indicates a function invocation.
+  IMPLICIT_CALL = ['IDENTIFIER', 'NUMBER', 'STRING', 'JS', 'REGEX', 'NEW', 'PARAM_START', 'TRY', 'DELETE', 'TYPEOF', 'SWITCH', 'TRUE', 'FALSE', 'YES', 'NO', 'ON', 'OFF', '!', '!!', 'NOT', '@', '->', '=>', '[', '(', '{'];
+  // Tokens indicating that the implicit call must enclose a block of expressions.
+  IMPLICIT_BLOCK = ['->', '=>', '{', '[', ','];
+  // Tokens that always mark the end of an implicit call for single-liners.
+  IMPLICIT_END = ['IF', 'UNLESS', 'FOR', 'WHILE', 'TERMINATOR', 'INDENT', 'OUTDENT'];
+  // Single-line flavors of block expressions that have unclosed endings.
+  // The grammar can't disambiguate them, so we insert the implicit indentation.
+  SINGLE_LINERS = ['ELSE', "->", "=>", 'TRY', 'FINALLY', 'THEN'];
+  SINGLE_CLOSERS = ['TERMINATOR', 'CATCH', 'FINALLY', 'ELSE', 'OUTDENT', 'LEADING_WHEN'];
+  // Utility Functions
+  // -----------------
+  // Does a list include a value?
+  include = function include(list, value) {
+    return list.indexOf(value) >= 0;
   };
-})();
+})();

lib/scope.js

@@ -1,114 +1,119 @@
 (function(){
   var Scope;
   var __hasProp = Object.prototype.hasOwnProperty;
+  // The **Scope** class regulates lexical scoping within CoffeeScript. As you
+  // generate code, you create a tree of scopes in the same shape as the nested
+  // function bodies. Each scope knows about the variables declared within it,
+  // and has a reference to its parent enclosing scope. In this way, we know which
+  // variables are new and need to be declared with `var`, and which are shared
+  // with the outside.
+  // Set up exported variables for both **Node.js** and the browser.
   if (!((typeof process !== "undefined" && process !== null))) {
     this.exports = this;
   }
-  // Scope objects form a tree corresponding to the shape of the function
-  // definitions present in the script. They provide lexical scope, to determine
-  // whether a variable has been seen before or if it needs to be declared.
-  //
-  // Initialize a scope with its parent, for lookups up the chain,
-  // as well as the Expressions body where it should declare its variables,
-  // and the function that it wraps.
-  Scope = (exports.Scope = function Scope(parent, expressions, method) {
-    var _a;
-    _a = [parent, expressions, method];
-    this.parent = _a[0];
-    this.expressions = _a[1];
-    this.method = _a[2];
-    this.variables = {};
-    this.temp_var = this.parent ? this.parent.temp_var : '_a';
-    return this;
-  });
-  // Look up a variable in lexical scope, or declare it if not found.
-  Scope.prototype.find = function find(name) {
-    if (this.check(name)) {
-      return true;
-    }
-    this.variables[name] = 'var';
-    return false;
-  };
-  // Define a local variable as originating from a parameter in current scope
-  // -- no var required.
-  Scope.prototype.parameter = function parameter(name) {
-    return this.variables[name] = 'param';
-  };
-  // Just check to see if a variable has already been declared.
-  Scope.prototype.check = function check(name) {
-    if (this.variables[name]) {
-      return true;
-    }
-    return !!(this.parent && this.parent.check(name));
-  };
-  // You can reset a found variable on the immediate scope.
-  Scope.prototype.reset = function reset(name) {
-    return delete this.variables[name];
-  };
-  // Find an available, short, name for a compiler-generated variable.
-  Scope.prototype.free_variable = function free_variable() {
-    var ordinal;
-    while (this.check(this.temp_var)) {
-      ordinal = 1 + parseInt(this.temp_var.substr(1), 36);
-      this.temp_var = '_' + ordinal.toString(36).replace(/\d/g, 'a');
-    }
-    this.variables[this.temp_var] = 'var';
-    return this.temp_var;
-  };
-  // Ensure that an assignment is made at the top of scope (or top-level
-  // scope, if requested).
-  Scope.prototype.assign = function assign(name, value, top_level) {
-    if (top_level && this.parent) {
-      return this.parent.assign(name, value, top_level);
-    }
-    return this.variables[name] = {
-      value: value,
-      assigned: true
+  exports.Scope = (function() {
+    Scope = function Scope(parent, expressions, method) {
+      var _a;
+      _a = [parent, expressions, method];
+      this.parent = _a[0];
+      this.expressions = _a[1];
+      this.method = _a[2];
+      this.variables = {};
+      this.temp_var = this.parent ? this.parent.temp_var : '_a';
+      return this;
     };
-  };
-  // Does this scope reference any variables that need to be declared in the
-  // given function body?
-  Scope.prototype.has_declarations = function has_declarations(body) {
-    return body === this.expressions && this.declared_variables().length;
-  };
-  // Does this scope reference any assignments that need to be declared at the
-  // top of the given function body?
-  Scope.prototype.has_assignments = function has_assignments(body) {
-    return body === this.expressions && this.assigned_variables().length;
-  };
-  // Return the list of variables first declared in current scope.
-  Scope.prototype.declared_variables = function declared_variables() {
-    var _a, _b, key, val;
-    return (function() {
+    // Initialize a scope with its parent, for lookups up the chain,
+    // as well as a reference to the **Expressions** node is belongs to, which is
+    // where it should declare its variables, and a reference to the function that
+    // it wraps.
+    // Look up a variable name in lexical scope, and declare it if it does not
+    // already exist.
+    Scope.prototype.find = function find(name) {
+      if (this.check(name)) {
+        return true;
+      }
+      this.variables[name] = 'var';
+      return false;
+    };
+    // Reserve a variable name as originating from a function parameter for this
+    // scope. No `var` required for internal references.
+    Scope.prototype.parameter = function parameter(name) {
+      return this.variables[name] = 'param';
+    };
+    // Just check to see if a variable has already been declared, without reserving.
+    Scope.prototype.check = function check(name) {
+      if (this.variables[name]) {
+        return true;
+      }
+      return !!(this.parent && this.parent.check(name));
+    };
+    // If we need to store an intermediate result, find an available name for a
+    // compiler-generated variable. `_a`, `_b`, and so on...
+    Scope.prototype.free_variable = function free_variable() {
+      var ordinal;
+      while (this.check(this.temp_var)) {
+        ordinal = 1 + parseInt(this.temp_var.substr(1), 36);
+        this.temp_var = '_' + ordinal.toString(36).replace(/\d/g, 'a');
+      }
+      this.variables[this.temp_var] = 'var';
+      return this.temp_var;
+    };
+    // Ensure that an assignment is made at the top of this scope
+    // (or at the top-level scope, if requested).
+    Scope.prototype.assign = function assign(name, value, top_level) {
+      if (top_level && this.parent) {
+        return this.parent.assign(name, value, top_level);
+      }
+      return this.variables[name] = {
+        value: value,
+        assigned: true
+      };
+    };
+    // Does this scope reference any variables that need to be declared in the
+    // given function body?
+    Scope.prototype.has_declarations = function has_declarations(body) {
+      return body === this.expressions && this.declared_variables().length;
+    };
+    // Does this scope reference any assignments that need to be declared at the
+    // top of the given function body?
+    Scope.prototype.has_assignments = function has_assignments(body) {
+      return body === this.expressions && this.assigned_variables().length;
+    };
+    // Return the list of variables first declared in this scope.
+    Scope.prototype.declared_variables = function declared_variables() {
+      var _a, _b, key, val;
+      return (function() {
+        _a = []; _b = this.variables;
+        for (key in _b) { if (__hasProp.call(_b, key)) {
+          val = _b[key];
+          if (val === 'var') {
+            _a.push(key);
+          }
+        }}
+        return _a;
+      }).call(this).sort();
+    };
+    // Return the list of assignments that are supposed to be made at the top
+    // of this scope.
+    Scope.prototype.assigned_variables = function assigned_variables() {
+      var _a, _b, key, val;
       _a = []; _b = this.variables;
       for (key in _b) { if (__hasProp.call(_b, key)) {
         val = _b[key];
-        if (val === 'var') {
-          _a.push(key);
+        if (val.assigned) {
+          _a.push(key + " = " + (val.value));
         }
       }}
       return _a;
-    }).call(this).sort();
-  };
-  // Return the list of variables that are supposed to be assigned at the top
-  // of scope.
-  Scope.prototype.assigned_variables = function assigned_variables() {
-    var _a, _b, key, val;
-    _a = []; _b = this.variables;
-    for (key in _b) { if (__hasProp.call(_b, key)) {
-      val = _b[key];
-      if (val.assigned) {
-        _a.push(key + ' = ' + val.value);
-      }
-    }}
-    return _a;
-  };
-  // Compile the string representing all of the declared variables for this scope.
-  Scope.prototype.compiled_declarations = function compiled_declarations() {
-    return this.declared_variables().join(', ');
-  };
-  // Compile the string performing all of the variable assignments for this scope.
-  Scope.prototype.compiled_assignments = function compiled_assignments() {
-    return this.assigned_variables().join(', ');
-  };
-})();
+    };
+    // Compile the JavaScript for all of the variable declarations in this scope.
+    Scope.prototype.compiled_declarations = function compiled_declarations() {
+      return this.declared_variables().join(', ');
+    };
+    // Compile the JavaScript for all of the variable assignments in this scope.
+    Scope.prototype.compiled_assignments = function compiled_assignments() {
+      return this.assigned_variables().join(', ');
+    };
+    return Scope;
+  }).call(this);
+})();

package.json

@@ -3,5 +3,5 @@
     "description":  "Unfancy JavaScript",
     "keywords":     ["javascript", "language"],
     "author":       "Jeremy Ashkenas",
-    "version":      "0.5.1"
+    "version":      "0.5.5"
 }

src/cake.coffee

@@ -1,45 +1,67 @@
-# `cake` is a simplified version of Make (Rake, Jake) for CoffeeScript.
+# `cake` is a simplified version of [Make](http://www.gnu.org/software/make/)
+# ([Rake](http://rake.rubyforge.org/), [Jake](http://github.com/280north/jake))
+# for CoffeeScript. You define tasks with names and descriptions in a Cakefile,
+# and can call them from the command line, or invoke them from other tasks.
+#
+# Running `cake` with no arguments will print out a list of all the tasks in the
+# current directory's Cakefile.
 
-fs:       require 'fs'
-path:     require 'path'
-coffee:   require 'coffee-script'
+# External dependencies.
+fs:           require 'fs'
+path:         require 'path'
+optparse:     require 'optparse'
+CoffeeScript: require 'coffee-script'
 
+# Keep track of the list of defined tasks, the accepted options, and so on.
 tasks: {}
+options: {}
+switches: []
+oparse: null
 
-no_such_task: (task) ->
-  process.stdio.writeError('No such task: "' + task + '"\n')
-  process.exit(1)
-
-# Mixin the Cake functionality.
+# Mixin the top-level Cake functions for Cakefiles to use directly.
 process.mixin {
 
-  # Define a task with a name, a description, and the action itself.
+  # Define a Cake task with a short name, a sentence description,
+  # and the function to run as the action itself.
   task: (name, description, action) ->
     tasks[name]: {name: name, description: description, action: action}
 
-  # Invoke another task in the Cakefile.
+  # Define an option that the Cakefile accepts. The parsed options hash,
+  # containing all of the command-line options passed, will be made available
+  # as the first argument to the action.
+  option: (letter, flag, description) ->
+    switches.push [letter, flag, description]
+
+  # Invoke another task in the current Cakefile.
   invoke: (name) ->
     no_such_task name unless tasks[name]
-    tasks[name].action()
+    tasks[name].action options
+
 }
 
-# Display the list of Cake tasks.
+# Run `cake`. Executes all of the tasks you pass, in order. Note that Node's
+# asynchrony may cause tasks to execute in a different order than you'd expect.
+# If no tasks are passed, print the help screen.
+exports.run: ->
+  path.exists 'Cakefile', (exists) ->
+    throw new Error("Cakefile not found in ${process.cwd()}") unless exists
+    args: process.argv[2...process.argv.length]
+    CoffeeScript.run fs.readFileSync('Cakefile'), {source: 'Cakefile'}
+    oparse: new optparse.OptionParser switches
+    return print_tasks() unless args.length
+    options: oparse.parse(args)
+    invoke arg for arg in options.arguments
+
+# Display the list of Cake tasks in a format similar to `rake -T`
 print_tasks: ->
+  puts ''
   for name, task of tasks
     spaces: 20 - name.length
     spaces: if spaces > 0 then (' ' for i in [0..spaces]).join('') else ''
-    puts "cake " + name + spaces + ' # ' + task.description
-
-# Running `cake` runs the tasks you pass asynchronously (node-style), or
-# prints them out, with no arguments.
-exports.run: ->
-  path.exists 'Cakefile', (exists) ->
-    throw new Error('Cakefile not found in ' + process.cwd()) unless exists
-    args: process.ARGV[2...process.ARGV.length]
-    fs.readFile 'Cakefile', (err, source) ->
-      eval coffee.compile source
-      return print_tasks() unless args.length
-      for arg in args
-        no_such_task arg unless tasks[arg]
-        tasks[arg].action()
+    puts "cake $name$spaces # ${task.description}"
+  puts oparse.help() if switches.length
 
+# Print an error and exit when attempting to all an undefined task.
+no_such_task: (task) ->
+  process.stdio.writeError "No such task: \"$task\"\n"
+  process.exit 1

src/coffee-script.coffee

@@ -1,4 +1,12 @@
-# Set up for both the browser and the server.
+# CoffeeScript can be used both on the server, as a command-line compiler based
+# on Node.js/V8, or to run CoffeeScripts directly in the browser. This module
+# contains the main entry functions for tokenzing, parsing, and compiling source
+# CoffeeScript into JavaScript.
+#
+# If included on a webpage, it will automatically sniff out, compile, and
+# execute all scripts present in `text/coffeescript` tags.
+
+# Set up dependencies correctly for both the server and the browser.
 if process?
   process.mixin require 'nodes'
   path:         require 'path'
@@ -9,7 +17,38 @@ else
   parser: exports.parser
   this.exports: this.CoffeeScript: {}
 
-# Thin wrapper for Jison compatibility around the real lexer.
+# The current CoffeeScript version number.
+exports.VERSION: '0.5.5'
+
+# Compile a string of CoffeeScript code to JavaScript, using the Coffee/Jison
+# compiler.
+exports.compile: (code, options) ->
+  try
+    (parser.parse lexer.tokenize code).compile options
+  catch err
+    err.message: "In ${options.source}, ${err.message}" if options.source
+    throw err
+
+# Tokenize a string of CoffeeScript code, and return the array of tokens.
+exports.tokens: (code) ->
+  lexer.tokenize code
+
+# Tokenize and parse a string of CoffeeScript code, and return the AST. You can
+# then compile it by calling `.compile()` on the root, or traverse it by using
+# `.traverse()` with a callback.
+exports.nodes: (code) ->
+  parser.parse lexer.tokenize code
+
+# Compile and execute a string of CoffeeScript (on the server), correctly
+# setting `__filename`, `__dirname`, and relative `require()`.
+exports.run: (code, options) ->
+  module.filename: __filename: options.source
+  __dirname: path.dirname __filename
+  eval exports.compile code, options
+
+# The real Lexer produces a generic stream of tokens. This object provides a
+# thin wrapper around it, compatible with the Jison API. We can then pass it
+# directly as a "Jison lexer".
 parser.lexer: {
   lex: ->
     token: @tokens[@pos] or [""]
@@ -24,22 +63,15 @@ parser.lexer: {
   showPosition: -> @pos
 }
 
-exports.VERSION: '0.5.1'
-
-# Compile CoffeeScript to JavaScript, using the Coffee/Jison compiler.
-exports.compile: (code, options) ->
-  (parser.parse lexer.tokenize code).compile(options)
-
-# Just the tokens.
-exports.tokenize: (code) ->
-  lexer.tokenize code
-
-# Just the nodes.
-exports.tree: (code) ->
-  parser.parse lexer.tokenize code
-
-# Pretty-print a token stream.
-exports.print_tokens: (tokens) ->
-  strings: for token in tokens
-    '[' + token[0] + ' ' + token[1].toString().replace(/\n/, '\\n') + ']'
-  puts strings.join(' ')
+# Activate CoffeeScript in the browser by having it compile and evaluate
+# all script tags with a content-type of `text/coffeescript`. This happens
+# on page load. Unfortunately, the text contents of remote scripts cannot be
+# accessed from the browser, so only inline script tags will work.
+if document? and document.getElementsByTagName
+  process_scripts: ->
+    for tag in document.getElementsByTagName('script') when tag.type is 'text/coffeescript'
+      eval exports.compile tag.innerHTML
+  if window.addEventListener
+    window.addEventListener 'load', process_scripts, false
+  else if window.attachEvent
+    window.attachEvent 'onload', process_scripts

src/command.coffee

@@ -0,0 +1,161 @@
+# The `coffee` utility. Handles command-line compilation of CoffeeScript
+# into various forms: saved into `.js` files or printed to stdout, piped to
+# [JSLint](http://javascriptlint.com/) or recompiled every time the source is
+# saved, printed as a token stream or as the syntax tree, or launch an
+# interactive REPL.
+
+# External dependencies.
+fs:           require 'fs'
+path:         require 'path'
+optparse:     require 'optparse'
+CoffeeScript: require 'coffee-script'
+
+# The help banner that is printed when `coffee` is called without arguments.
+BANNER: '''
+  coffee compiles CoffeeScript source files into JavaScript.
+
+  Usage:
+    coffee path/to/script.coffee
+        '''
+
+# The list of all the valid option flags that `coffee` knows how to handle.
+SWITCHES: [
+  ['-c', '--compile',       'compile to JavaScript and save as .js files']
+  ['-i', '--interactive',   'run an interactive CoffeeScript REPL']
+  ['-o', '--output [DIR]',  'set the directory for compiled JavaScript']
+  ['-w', '--watch',         'watch scripts for changes, and recompile']
+  ['-p', '--print',         'print the compiled JavaScript to stdout']
+  ['-l', '--lint',          'pipe the compiled JavaScript through JSLint']
+  ['-s', '--stdio',         'listen for and compile scripts over stdio']
+  ['-e', '--eval',          'compile a string from the command line']
+  [      '--no-wrap',       'compile without the top-level function wrapper']
+  ['-t', '--tokens',        'print the tokens that the lexer produces']
+  ['-n', '--nodes',         'print the parse tree that Jison produces']
+  ['-v', '--version',       'display CoffeeScript version']
+  ['-h', '--help',          'display this help message']
+]
+
+# Top-level objects shared by all the functions.
+options: {}
+sources: []
+option_parser: null
+
+# Run `coffee` by parsing passed options and determining what action to take.
+# Many flags cause us to divert before compiling anything. Flags passed after
+# `--` will be passed verbatim to your script as arguments in `process.argv`
+exports.run: ->
+  parse_options()
+  return usage()                              if options.help
+  return version()                            if options.version
+  return require 'repl'                       if options.interactive
+  return compile_stdio()                      if options.stdio
+  return compile_script 'console', sources[0] if options.eval
+  return usage()                              unless sources.length
+  separator: sources.indexOf '--'
+  flags: []
+  if separator >= 0
+    flags: sources[(separator + 1)...sources.length]
+    sources: sources[0...separator]
+  process.ARGV: process.argv: flags
+  watch_scripts() if options.watch
+  compile_scripts()
+
+# Asynchronously read in each CoffeeScript in a list of source files and
+# compile them.
+compile_scripts: ->
+  compile: (source) ->
+    path.exists source, (exists) ->
+      throw new Error "File not found: $source" unless exists
+      fs.readFile source, (err, code) -> compile_script(source, code)
+  compile(source) for source in sources
+
+# Compile a single source script, containing the given code, according to the
+# requested options. Both compile_scripts and watch_scripts share this method
+# in common. If evaluating the script directly sets `__filename`, `__dirname`
+# and `module.filename` to be correct relative to the script's path.
+compile_script: (source, code) ->
+  o: options
+  code_opts: compile_options source
+  try
+    if      o.tokens      then print_tokens CoffeeScript.tokens code
+    else if o.nodes       then puts CoffeeScript.nodes(code).toString()
+    else if o.run         then CoffeeScript.run code, code_opts
+    else
+      js: CoffeeScript.compile code, code_opts
+      if o.print          then process.stdio.write js
+      else if o.compile   then write_js source, js
+      else if o.lint      then lint js
+  catch err
+    if o.watch            then puts err.message else throw err
+
+# Attach the appropriate listeners to compile scripts incoming over **stdin**,
+# and write them back to **stdout**.
+compile_stdio: ->
+  code: ''
+  process.stdio.open()
+  process.stdio.addListener 'data', (string) ->
+    code += string if string
+  process.stdio.addListener 'close', ->
+    compile_script 'stdio', code
+
+# Watch a list of source CoffeeScript files using `fs.watchFile`, recompiling
+# them every time the files are updated. May be used in combination with other
+# options, such as `--lint` or `--print`.
+watch_scripts: ->
+  watch: (source) ->
+    fs.watchFile source, {persistent: true, interval: 500}, (curr, prev) ->
+      return if curr.mtime.getTime() is prev.mtime.getTime()
+      fs.readFile source, (err, code) -> compile_script(source, code)
+  watch(source) for source in sources
+
+# Write out a JavaScript source file with the compiled code. By default, files
+# are written out in `cwd` as `.js` files with the same name, but the output
+# directory can be customized with `--output`.
+write_js: (source, js) ->
+  filename: path.basename(source, path.extname(source)) + '.js'
+  dir:      options.output or path.dirname(source)
+  js_path:  path.join dir, filename
+  fs.writeFile js_path, js
+
+# Pipe compiled JS through JSLint (requires a working `jsl` command), printing
+# any errors or warnings that arise.
+lint: (js) ->
+  jsl: process.createChildProcess('jsl', ['-nologo', '-stdin'])
+  jsl.addListener 'output', (result) ->
+    puts result.replace(/\n/g, '') if result
+  jsl.addListener 'error', (result) ->
+    puts result if result
+  jsl.write js
+  jsl.close()
+
+# Pretty-print a stream of tokens.
+print_tokens: (tokens) ->
+  strings: for token in tokens
+    [tag, value]: [token[0], token[1].toString().replace(/\n/, '\\n')]
+    "[$tag $value]"
+  puts strings.join(' ')
+
+# Use the [OptionParser module](optparse.html) to extract all options from
+# `process.argv` that are specified in `SWITCHES`.
+parse_options: ->
+  option_parser: new optparse.OptionParser SWITCHES, BANNER
+  o: options:    option_parser.parse(process.argv)
+  options.run:   not (o.compile or o.print or o.lint)
+  options.print: !!  (o.print or (o.eval or o.stdio and o.compile))
+  sources:       options.arguments[2...options.arguments.length]
+
+# The compile-time options to pass to the CoffeeScript compiler.
+compile_options: (source) ->
+  o: {source: source}
+  o['no_wrap']: options['no-wrap']
+  o
+
+# Print the `--help` usage message and exit.
+usage: ->
+  puts option_parser.help()
+  process.exit 0
+
+# Print the `--version` message and exit.
+version: ->
+  puts "CoffeeScript version ${CoffeeScript.VERSION}"
+  process.exit 0

src/command_line.coffee

@@ -1,130 +0,0 @@
-fs:       require 'fs'
-path:     require 'path'
-coffee:   require 'coffee-script'
-optparse: require('optparse')
-
-BANNER: '''
-  coffee compiles CoffeeScript source files into JavaScript.
-
-  Usage:
-    coffee path/to/script.coffee
-        '''
-
-SWITCHES: [
-  ['-i', '--interactive',   'run an interactive CoffeeScript REPL']
-  ['-r', '--run',           'compile and run a CoffeeScript']
-  ['-o', '--output [DIR]',  'set the directory for compiled JavaScript']
-  ['-w', '--watch',         'watch scripts for changes, and recompile']
-  ['-p', '--print',         'print the compiled JavaScript to stdout']
-  ['-l', '--lint',          'pipe the compiled JavaScript through JSLint']
-  ['-e', '--eval',          'compile a string from the command line']
-  ['-t', '--tokens',        'print the tokens that the lexer produces']
-  ['-tr','--tree',          'print the parse tree that Jison produces']
-  ['-n', '--no-wrap',       'compile without the top-level function wrapper']
-  ['-v', '--version',       'display CoffeeScript version']
-  ['-h', '--help',          'display this help message']
-]
-
-options: {}
-sources: []
-option_parser: null
-
-# The CommandLine handles all of the functionality of the `coffee` utility.
-exports.run: ->
-  parse_options()
-  return require 'repl' if options.interactive
-  return compile_script 'terminal', sources[0] if options.eval
-  usage() unless sources.length
-  separator: sources.indexOf '--'
-  flags: []
-  if separator >= 0
-    flags: sources[(separator + 1)...sources.length]
-    sources: sources[0...separator]
-  process.ARGV = flags
-  watch_scripts() if options.watch
-  compile_scripts()
-  this
-
-# The "--help" usage message.
-usage: ->
-  puts '\n' + option_parser.help() + '\n'
-  process.exit 0
-
-# The "--version" message.
-version: ->
-  puts "CoffeeScript version " + coffee.VERSION
-  process.exit 0
-
-# Compiles the source CoffeeScript, returning the desired JavaScript, tokens,
-# or JSLint results.
-compile_scripts: ->
-  compile: (source) ->
-    fs.readFile source, (err, code) -> compile_script(source, code)
-  compile(source) for source in sources
-
-
-# Compile a single source script, containing the given code, according to the
-# requested options. Both compile_scripts and watch_scripts share this method.
-compile_script: (source, code) ->
-  opts: options
-  o: if opts.no_wrap then {no_wrap: true} else {}
-  try
-    if      opts.tokens   then coffee.print_tokens coffee.tokenize code
-    else if opts.tree     then puts coffee.tree(code).toString()
-    else
-      js: coffee.compile code, o
-      if      opts.run                then eval js
-      else if opts.lint               then lint js
-      else if opts.print or opts.eval then puts js
-      else                     write_js source, js
-  catch err
-    if opts.watch then puts err.message else throw err
-
-# Watch a list of source CoffeeScript files, recompiling them every time the
-# files are updated.
-watch_scripts: ->
-  watch: (source) ->
-    process.watchFile source, {persistent: true, interval: 500}, (curr, prev) ->
-      return if curr.mtime.getTime() is prev.mtime.getTime()
-      fs.readFile source, (err, code) -> compile_script(source, code)
-  watch(source) for source in sources
-
-# Write out a JavaScript source file with the compiled code.
-write_js: (source, js) ->
-  filename: path.basename(source, path.extname(source)) + '.js'
-  dir:      options.output or path.dirname(source)
-  js_path:  path.join dir, filename
-  fs.writeFile js_path, js
-
-# Pipe compiled JS through JSLint (requires a working 'jsl' command).
-lint: (js) ->
-  jsl: process.createChildProcess('jsl', ['-nologo', '-stdin'])
-  jsl.addListener 'output', (result) ->
-    puts result.replace(/\n/g, '') if result
-  jsl.addListener 'error', (result) ->
-    puts result if result
-  jsl.write js
-  jsl.close()
-
-# Use OptionParser for all the options.
-parse_options: ->
-  opts:           options: {}
-  oparser:        option_parser: new optparse.OptionParser SWITCHES
-  oparser.banner: BANNER
-
-  oparser.add 'interactive',      -> opts.interactive: true
-  oparser.add 'run',              -> opts.run:         true
-  oparser.add 'output',     (dir) -> opts.output:      dir
-  oparser.add 'watch',            -> opts.watch:       true
-  oparser.add 'print',            -> opts.print:       true
-  oparser.add 'lint',             -> opts.lint:        true
-  oparser.add 'eval',             -> opts.eval:        true
-  oparser.add 'tokens',           -> opts.tokens:      true
-  oparser.add 'tree',             -> opts.tree:        true
-  oparser.add 'no-wrap',          -> opts.no_wrap:     true
-  oparser.add 'help',             => usage()
-  oparser.add 'version',          => version()
-
-  paths: oparser.parse(process.ARGV)
-  sources: paths[2...paths.length]
-

src/grammar.coffee

@@ -1,63 +1,76 @@
+# The CoffeeScript parser is generated by [Jison](http://github.com/zaach/jison)
+# from this grammar file. Jison is a bottom-up parser generator, similar in
+# style to [Bison](http://www.gnu.org/software/bison), implemented in JavaScript.
+# It can recognize [LALR(1), LR(0), SLR(1), and LR(1)](http://en.wikipedia.org/wiki/LR_grammar)
+# type grammars. To create the Jison parser, we list the pattern to match
+# on the left-hand side, and the action to take (usually the creation of syntax
+# tree nodes) on the right. As the parser runs, it
+# shifts tokens from our token stream, from left to right, and
+# [attempts to match](http://en.wikipedia.org/wiki/Bottom-up_parsing)
+# the token sequence against the rules below. When a match can be made, it
+# reduces into the [nonterminal](http://en.wikipedia.org/wiki/Terminal_and_nonterminal_symbols)
+# (the enclosing name at the top), and we proceed from there.
+#
+# If you run the `cake build:parser` command, Jison constructs a parse table
+# from our rules and saves it into `lib/parser.js`.
+
+# The only dependency is on the **Jison.Parser**.
 Parser: require('jison').Parser
 
-# DSL ===================================================================
+# Jison DSL
+# ---------
 
-# Detect functions: [
+# Since we're going to be wrapped in a function by Jison in any case, if our
+# action immediately returns a value, we can optimize by removing the function
+# wrapper and just returning the value directly.
 unwrap: /function\s*\(\)\s*\{\s*return\s*([\s\S]*);\s*\}/
 
-# Quickie DSL for Jison access.
-o: (pattern_string, func, options) ->
-  if func
-    func: if match: (func + "").match(unwrap) then match[1] else '(' + func + '())'
-    [pattern_string, '$$ = ' + func + ';', options]
-  else
-    [pattern_string, '$$ = $1;', options]
+# Our handy DSL for Jison grammar generation, thanks to
+# [Tim Caswell](http://github.com/creationix). For every rule in the grammar,
+# we pass the pattern-defining string, the action to run, and extra options,
+# optionally. If no action is specified, we simply pass the value of the
+# previous nonterminal.
+o: (pattern_string, action, options) ->
+  return [pattern_string, '$$ = $1;', options] unless action
+  action: if match: (action + '').match(unwrap) then match[1] else "($action())"
+  [pattern_string, "$$ = $action;", options]
 
-# Precedence ===========================================================
-
-operators: [
-  ["left",      '?']
-  ["nonassoc",  'UMINUS', 'UPLUS', 'NOT', '!', '!!', '~', '++', '--']
-  ["left",      '*', '/', '%']
-  ["left",      '+', '-']
-  ["left",      '<<', '>>', '>>>']
-  ["left",      '&', '|', '^']
-  ["left",      '<=', '<', '>', '>=']
-  ["right",     'DELETE', 'INSTANCEOF', 'TYPEOF']
-  ["right",     '==', '!=', 'IS', 'ISNT']
-  ["left",      '&&', '||', 'AND', 'OR']
-  ["right",     '-=', '+=', '/=', '*=', '%=', '||=', '&&=', '?=']
-  ["left",      '.']
-  ["right",     'INDENT']
-  ["left",      'OUTDENT']
-  ["right",     'WHEN', 'LEADING_WHEN', 'IN', 'OF', 'BY', 'THROW']
-  ["right",     'FOR', 'NEW', 'SUPER']
-  ["left",      'EXTENDS']
-  ["right",     'ASSIGN', 'RETURN']
-  ["right",     '->', '=>', 'UNLESS', 'IF', 'ELSE', 'WHILE']
-]
-
-# Grammar ==============================================================
+# Grammatical Rules
+# -----------------
 
+# In all of the rules that follow, you'll see the name of the nonterminal as
+# the key to a list of alternative matches. With each match's action, the
+# dollar-sign variables are provided by Jison as references to the value of
+# their numeric position, so in this rule:
+#
+#     "Expression UNLESS Expression"
+#
+# `$1` would be the value of the first `Expression`, `$2` would be the token
+# for the `UNLESS` terminal, and `$3` would be the value of the second
+# `Expression`.
 grammar: {
 
-  # All parsing will end in this rule, being the trunk of the AST.
+  # The **Root** is the top-level node in the syntax tree. Since we parse bottom-up,
+  # all parsing must end here.
   Root: [
     o "",                                  -> new Expressions()
     o "TERMINATOR",                        -> new Expressions()
-    o "Expressions",                       -> $1
-    o "Block TERMINATOR",                  -> $1
+    o "Expressions"
+    o "Block TERMINATOR"
   ]
 
-  # Any list of expressions or method body, seperated by line breaks or semis.
+  # Any list of expressions or method body, seperated by line breaks or
+  # semicolons.
   Expressions: [
-    o "Expression",                        -> Expressions.wrap([$1])
-    o "Expressions TERMINATOR Expression", -> $1.push($3)
-    o "Expressions TERMINATOR",            -> $1
+    o "Expression",                        -> Expressions.wrap [$1]
+    o "Expressions TERMINATOR Expression", -> $1.push $3
+    o "Expressions TERMINATOR"
   ]
 
-  # All types of expressions in our language. The basic unit of CoffeeScript
-  # is the expression.
+  # All the different types of expressions in our language. The basic unit of
+  # CoffeeScript is the **Expression** -- you'll notice that there is no
+  # "statement" nonterminal. Expressions serve as the building blocks
+  # of many other rules, making them somewhat circular.
   Expression: [
     o "Value"
     o "Call"
@@ -72,255 +85,229 @@ grammar: {
     o "For"
     o "Switch"
     o "Extends"
+    o "Class"
     o "Splat"
     o "Existence"
     o "Comment"
   ]
 
-  # A block of expressions. Note that the Rewriter will convert some postfix
-  # forms into blocks for us, by altering the token stream.
+  # A an indented block of expressions. Note that the [Rewriter](rewriter.html)
+  # will convert some postfix forms into blocks for us, by adjusting the
+  # token stream.
   Block: [
     o "INDENT Expressions OUTDENT",             -> $2
     o "INDENT OUTDENT",                         -> new Expressions()
   ]
 
+  # A literal identifier, a variable name or property.
   Identifier: [
-    o "IDENTIFIER",                             -> new LiteralNode(yytext)
+    o "IDENTIFIER",                             -> new LiteralNode yytext
   ]
 
+  # Alphanumerics are separated from the other **Literal** matchers because
+  # they can also serve as keys in object literals.
   AlphaNumeric: [
-    o "NUMBER",                                 -> new LiteralNode(yytext)
-    o "STRING",                                 -> new LiteralNode(yytext)
+    o "NUMBER",                                 -> new LiteralNode yytext
+    o "STRING",                                 -> new LiteralNode yytext
   ]
 
-  # All hard-coded values. These can be printed straight to JavaScript.
+  # All of our immediate values. These can (in general), be passed straight
+  # through and printed to JavaScript.
   Literal: [
-    o "AlphaNumeric",                           -> $1
-    o "JS",                                     -> new LiteralNode(yytext)
-    o "REGEX",                                  -> new LiteralNode(yytext)
-    o "BREAK",                                  -> new LiteralNode(yytext)
-    o "CONTINUE",                               -> new LiteralNode(yytext)
-    o "TRUE",                                   -> new LiteralNode(true)
-    o "FALSE",                                  -> new LiteralNode(false)
-    o "YES",                                    -> new LiteralNode(true)
-    o "NO",                                     -> new LiteralNode(false)
-    o "ON",                                     -> new LiteralNode(true)
-    o "OFF",                                    -> new LiteralNode(false)
+    o "AlphaNumeric"
+    o "JS",                                     -> new LiteralNode yytext
+    o "REGEX",                                  -> new LiteralNode yytext
+    o "BREAK",                                  -> new LiteralNode yytext
+    o "CONTINUE",                               -> new LiteralNode yytext
+    o "TRUE",                                   -> new LiteralNode true
+    o "FALSE",                                  -> new LiteralNode false
+    o "YES",                                    -> new LiteralNode true
+    o "NO",                                     -> new LiteralNode false
+    o "ON",                                     -> new LiteralNode true
+    o "OFF",                                    -> new LiteralNode false
   ]
 
-  # Assignment to a variable (or index).
+  # Assignment of a variable, property, or index to a value.
   Assign: [
-    o "Value ASSIGN Expression",                -> new AssignNode($1, $3)
+    o "Value ASSIGN Expression",                -> new AssignNode $1, $3
   ]
 
-  # Assignment within an object literal (can be quoted).
+  # Assignment when it happens within an object literal. The difference from
+  # the ordinary **Assign** is that these allow numbers and strings as keys.
   AssignObj: [
-    o "Identifier ASSIGN Expression",           -> new AssignNode(new ValueNode($1), $3, 'object')
-    o "AlphaNumeric ASSIGN Expression",         -> new AssignNode(new ValueNode($1), $3, 'object')
+    o "Identifier ASSIGN Expression",           -> new AssignNode new ValueNode($1), $3, 'object'
+    o "AlphaNumeric ASSIGN Expression",         -> new AssignNode new ValueNode($1), $3, 'object'
     o "Comment"
   ]
 
-  # A return statement.
+  # A return statement from a function body.
   Return: [
-    o "RETURN Expression",                      -> new ReturnNode($2)
-    o "RETURN",                                 -> new ReturnNode(new ValueNode(new LiteralNode('null')))
+    o "RETURN Expression",                      -> new ReturnNode $2
+    o "RETURN",                                 -> new ReturnNode new ValueNode new LiteralNode 'null'
   ]
 
-  # A comment.
+  # A comment. Because CoffeeScript passes comments through to JavaScript, we
+  # have to parse comments like any other construct, and identify all of the
+  # positions in which they can occur in the grammar.
   Comment: [
-    o "COMMENT",                                -> new CommentNode(yytext)
+    o "COMMENT",                                -> new CommentNode yytext
   ]
 
-  # Arithmetic and logical operators
-  # For Ruby's Operator precedence, see: [
-  # https://www.cs.auckland.ac.nz/references/ruby/ProgrammingRuby/language.html
-  Operation: [
-    o "! Expression",                           -> new OpNode('!', $2)
-    o "!! Expression",                          -> new OpNode('!!', $2)
-    o("- Expression",                           (-> new OpNode('-', $2)), {prec: 'UMINUS'})
-    o("+ Expression",                           (-> new OpNode('+', $2)), {prec: 'UPLUS'})
-    o "NOT Expression",                         -> new OpNode('not', $2)
-    o "~ Expression",                           -> new OpNode('~', $2)
-    o "-- Expression",                          -> new OpNode('--', $2)
-    o "++ Expression",                          -> new OpNode('++', $2)
-    o "DELETE Expression",                      -> new OpNode('delete', $2)
-    o "TYPEOF Expression",                      -> new OpNode('typeof', $2)
-    o "Expression --",                          -> new OpNode('--', $1, null, true)
-    o "Expression ++",                          -> new OpNode('++', $1, null, true)
-
-    o "Expression * Expression",                -> new OpNode('*', $1, $3)
-    o "Expression / Expression",                -> new OpNode('/', $1, $3)
-    o "Expression % Expression",                -> new OpNode('%', $1, $3)
-
-    o "Expression + Expression",                -> new OpNode('+', $1, $3)
-    o "Expression - Expression",                -> new OpNode('-', $1, $3)
-
-    o "Expression << Expression",               -> new OpNode('<<', $1, $3)
-    o "Expression >> Expression",               -> new OpNode('>>', $1, $3)
-    o "Expression >>> Expression",              -> new OpNode('>>>', $1, $3)
-    o "Expression & Expression",                -> new OpNode('&', $1, $3)
-    o "Expression | Expression",                -> new OpNode('|', $1, $3)
-    o "Expression ^ Expression",                -> new OpNode('^', $1, $3)
-
-    o "Expression <= Expression",               -> new OpNode('<=', $1, $3)
-    o "Expression < Expression",                -> new OpNode('<', $1, $3)
-    o "Expression > Expression",                -> new OpNode('>', $1, $3)
-    o "Expression >= Expression",               -> new OpNode('>=', $1, $3)
-
-    o "Expression == Expression",               -> new OpNode('==', $1, $3)
-    o "Expression != Expression",               -> new OpNode('!=', $1, $3)
-    o "Expression IS Expression",               -> new OpNode('is', $1, $3)
-    o "Expression ISNT Expression",             -> new OpNode('isnt', $1, $3)
-
-    o "Expression && Expression",               -> new OpNode('&&', $1, $3)
-    o "Expression || Expression",               -> new OpNode('||', $1, $3)
-    o "Expression AND Expression",              -> new OpNode('and', $1, $3)
-    o "Expression OR Expression",               -> new OpNode('or', $1, $3)
-    o "Expression ? Expression",                -> new OpNode('?', $1, $3)
-
-    o "Expression -= Expression",               -> new OpNode('-=', $1, $3)
-    o "Expression += Expression",               -> new OpNode('+=', $1, $3)
-    o "Expression /= Expression",               -> new OpNode('/=', $1, $3)
-    o "Expression *= Expression",               -> new OpNode('*=', $1, $3)
-    o "Expression %= Expression",               -> new OpNode('%=', $1, $3)
-    o "Expression ||= Expression",              -> new OpNode('||=', $1, $3)
-    o "Expression &&= Expression",              -> new OpNode('&&=', $1, $3)
-    o "Expression ?= Expression",               -> new OpNode('?=', $1, $3)
-
-    o "Expression INSTANCEOF Expression",       -> new OpNode('instanceof', $1, $3)
-    o "Expression IN Expression",               -> new OpNode('in', $1, $3)
-  ]
-
-  # The existence operator.
+  # [The existential operator](http://jashkenas.github.com/coffee-script/#existence).
   Existence: [
-    o "Expression ?",                           -> new ExistenceNode($1)
+    o "Expression ?",                           -> new ExistenceNode $1
   ]
 
-  # Function definition.
+  # The **Code** node is the function literal. It's defined by an indented block
+  # of **Expressions** preceded by a function arrow, with an optional parameter
+  # list.
   Code: [
-    o "PARAM_START ParamList PARAM_END FuncGlyph Block", -> new CodeNode($2, $5, $4)
-    o "FuncGlyph Block",                        -> new CodeNode([], $2, $1)
+    o "PARAM_START ParamList PARAM_END FuncGlyph Block", -> new CodeNode $2, $5, $4
+    o "FuncGlyph Block",                        -> new CodeNode [], $2, $1
   ]
 
-  # The symbols to signify functions, and bound functions.
+  # CoffeeScript has two different symbols for functions. `->` is for ordinary
+  # functions, and `=>` is for functions bound to the current value of *this*.
   FuncGlyph: [
     o "->",                                     -> 'func'
     o "=>",                                     -> 'boundfunc'
   ]
 
-  # The parameters to a function definition.
+  # The list of parameters that a function accepts can be of any length.
   ParamList: [
     o "",                                       -> []
     o "Param",                                  -> [$1]
     o "ParamList , Param",                      -> $1.concat [$3]
   ]
 
-  # A Parameter (or ParamSplat) in a function definition.
+  # A single parameter in a function definition can be ordinary, or a splat
+  # that hoovers up the remaining arguments.
   Param: [
-    o "PARAM",                                  -> new LiteralNode(yytext)
-    o "Param . . .",                            -> new SplatNode($1)
+    o "PARAM",                                  -> new LiteralNode yytext
+    o "Param . . .",                            -> new SplatNode $1
   ]
 
-  # A regular splat.
+  # A splat that occurs outside of a parameter list.
   Splat: [
-    o "Expression . . .",                       -> new SplatNode($1)
+    o "Expression . . .",                       -> new SplatNode $1
   ]
 
-  # Expressions that can be treated as values.
+  # The types of things that can be treated as values -- assigned to, invoked
+  # as functions, indexed into, named as a class, etc.
   Value: [
-    o "Identifier",                             -> new ValueNode($1)
-    o "Literal",                                -> new ValueNode($1)
-    o "Array",                                  -> new ValueNode($1)
-    o "Object",                                 -> new ValueNode($1)
-    o "Parenthetical",                          -> new ValueNode($1)
-    o "Range",                                  -> new ValueNode($1)
-    o "This",                                   -> $1
-    o "Value Accessor",                         -> $1.push($2)
-    o "Invocation Accessor",                    -> new ValueNode($1, [$2])
+    o "Identifier",                             -> new ValueNode $1
+    o "Literal",                                -> new ValueNode $1
+    o "Array",                                  -> new ValueNode $1
+    o "Object",                                 -> new ValueNode $1
+    o "Parenthetical",                          -> new ValueNode $1
+    o "Range",                                  -> new ValueNode $1
+    o "This"
+    o "Value Accessor",                         -> $1.push $2
+    o "Invocation Accessor",                    -> new ValueNode $1, [$2]
   ]
 
-  # Accessing into an object or array, through dot or index notation.
+  # The general group of accessors into an object, by property, by prototype
+  # or by array index or slice.
   Accessor: [
-    o "PROPERTY_ACCESS Identifier",             -> new AccessorNode($2)
-    o "PROTOTYPE_ACCESS Identifier",            -> new AccessorNode($2, 'prototype')
-    o "SOAK_ACCESS Identifier",                 -> new AccessorNode($2, 'soak')
+    o "PROPERTY_ACCESS Identifier",             -> new AccessorNode $2
+    o "PROTOTYPE_ACCESS Identifier",            -> new AccessorNode $2, 'prototype'
+    o "SOAK_ACCESS Identifier",                 -> new AccessorNode $2, 'soak'
     o "Index"
-    o "Slice",                                  -> new SliceNode($1)
+    o "Slice",                                  -> new SliceNode $1
   ]
 
-  # Indexing into an object or array.
+  # Indexing into an object or array using bracket notation.
   Index: [
-    o "INDEX_START Expression INDEX_END",       -> new IndexNode($2)
-    o "SOAKED_INDEX_START Expression SOAKED_INDEX_END", -> new IndexNode($2, 'soak')
+    o "INDEX_START Expression INDEX_END",       -> new IndexNode $2
+    o "SOAKED_INDEX_START Expression SOAKED_INDEX_END", -> new IndexNode $2, 'soak'
   ]
 
-  # An object literal.
+  # In CoffeeScript, an object literal is simply a list of assignments.
   Object: [
-    o "{ AssignList }",                         -> new ObjectNode($2)
+    o "{ AssignList }",                         -> new ObjectNode $2
+    o "{ IndentedAssignList }",                 -> new ObjectNode $2
   ]
 
-  # Assignment within an object literal (comma or newline separated).
+  # Class definitions have optional bodies of prototype property assignments,
+  # and optional references to the superclass.
+  Class: [
+    o "CLASS Value",                            -> new ClassNode $2
+    o "CLASS Value EXTENDS Value",              -> new ClassNode $2, $4
+    o "CLASS Value IndentedAssignList",         -> new ClassNode $2, null, $3
+    o "CLASS Value EXTENDS Value IndentedAssignList", -> new ClassNode $2, $4, $5
+  ]
+
+  # Assignment of properties within an object literal can be separated by
+  # comma, as in JavaScript, or simply by newline.
   AssignList: [
     o "",                                       -> []
     o "AssignObj",                              -> [$1]
     o "AssignList , AssignObj",                 -> $1.concat [$3]
     o "AssignList TERMINATOR AssignObj",        -> $1.concat [$3]
     o "AssignList , TERMINATOR AssignObj",      -> $1.concat [$4]
+  ]
+
+  # An **AssignList** within a block indentation.
+  IndentedAssignList: [
     o "INDENT AssignList OUTDENT",              -> $2
   ]
 
-  # All flavors of function call (instantiation, super, and regular).
+  # The three flavors of function call: normal, object instantiation with `new`,
+  # and calling `super()`
   Call: [
-    o "Invocation",                             -> $1
+    o "Invocation"
     o "NEW Invocation",                         -> $2.new_instance()
-    o "Super",                                  -> $1
+    o "Super"
   ]
 
-  # Extending an object's prototype.
+  # Extending an object by setting its prototype chain to reference a parent
+  # object.
   Extends: [
-    o "Value EXTENDS Value",                    -> new ExtendsNode($1, $3)
+    o "Value EXTENDS Value",                    -> new ExtendsNode $1, $3
   ]
 
-  # A generic function invocation.
+  # Ordinary function invocation, or a chained series of calls.
   Invocation: [
-    o "Value Arguments",                        -> new CallNode($1, $2)
-    o "Invocation Arguments",                   -> new CallNode($1, $2)
+    o "Value Arguments",                        -> new CallNode $1, $2
+    o "Invocation Arguments",                   -> new CallNode $1, $2
   ]
 
-  # The list of arguments to a function invocation.
+  # The list of arguments to a function call.
   Arguments: [
     o "CALL_START ArgList CALL_END",            -> $2
   ]
 
   # Calling super.
   Super: [
-    o "SUPER CALL_START ArgList CALL_END",      -> new CallNode('super', $3)
+    o "SUPER CALL_START ArgList CALL_END",      -> new CallNode 'super', $3
   ]
 
-  # This references, either naked or to a property.
+  # A reference to the *this* current object, either naked or to a property.
   This: [
-    o "@",                                      -> new ValueNode(new LiteralNode('this'))
-    o "@ Identifier",                           -> new ValueNode(new LiteralNode('this'), [new AccessorNode($2)])
+    o "@",                                      -> new ValueNode new LiteralNode 'this'
+    o "@ Identifier",                           -> new ValueNode new LiteralNode('this'), [new AccessorNode($2)]
   ]
 
-  # The range literal.
+  # The CoffeeScript range literal.
   Range: [
-    o "[ Expression . . Expression ]",          -> new RangeNode($2, $5)
-    o "[ Expression . . . Expression ]",        -> new RangeNode($2, $6, true)
+    o "[ Expression . . Expression ]",          -> new RangeNode $2, $5
+    o "[ Expression . . . Expression ]",        -> new RangeNode $2, $6, true
   ]
 
   # The slice literal.
   Slice: [
-    o "INDEX_START Expression . . Expression INDEX_END", -> new RangeNode($2, $5)
-    o "INDEX_START Expression . . . Expression INDEX_END", -> new RangeNode($2, $6, true)
+    o "INDEX_START Expression . . Expression INDEX_END", -> new RangeNode $2, $5
+    o "INDEX_START Expression . . . Expression INDEX_END", -> new RangeNode $2, $6, true
   ]
 
   # The array literal.
   Array: [
-    o "[ ArgList ]",                            -> new ArrayNode($2)
+    o "[ ArgList ]",                            -> new ArrayNode $2
   ]
 
-  # A list of arguments to a method call, or as the contents of an array.
+  # The **ArgList** is both the list of objects passed into a function call,
+  # as well as the contents of an array literal
+  # (i.e. comma-separated expressions). Newlines work as well.
   ArgList: [
     o "",                                       -> []
     o "Expression",                             -> [$1]
@@ -329,64 +316,75 @@ grammar: {
     o "ArgList TERMINATOR Expression",          -> $1.concat [$3]
     o "ArgList , TERMINATOR Expression",        -> $1.concat [$4]
     o "ArgList , INDENT Expression",            -> $1.concat [$4]
-    o "ArgList OUTDENT",                        -> $1
+    o "ArgList OUTDENT"
   ]
 
-  # Just simple, comma-separated, required arguments (no fancy syntax).
+  # Just simple, comma-separated, required arguments (no fancy syntax). We need
+  # this to be separate from the **ArgList** for use in **Switch** blocks, where
+  # having the newlines wouldn't make sense.
   SimpleArgs: [
-    o "Expression",                             -> $1
+    o "Expression"
     o "SimpleArgs , Expression",                ->
       if $1 instanceof Array then $1.concat([$3]) else [$1].concat([$3])
   ]
 
-  # Try/catch/finally exception handling blocks.
+  # The variants of *try/catch/finally* exception handling blocks.
   Try: [
-    o "TRY Block Catch",                        -> new TryNode($2, $3[0], $3[1])
-    o "TRY Block FINALLY Block",                -> new TryNode($2, null, null, $4)
-    o "TRY Block Catch FINALLY Block",          -> new TryNode($2, $3[0], $3[1], $5)
+    o "TRY Block Catch",                        -> new TryNode $2, $3[0], $3[1]
+    o "TRY Block FINALLY Block",                -> new TryNode $2, null, null, $4
+    o "TRY Block Catch FINALLY Block",          -> new TryNode $2, $3[0], $3[1], $5
   ]
 
-  # A catch clause.
+  # A catch clause names its error and runs a block of code.
   Catch: [
     o "CATCH Identifier Block",                 -> [$2, $3]
   ]
 
-  # Throw an exception.
+  # Throw an exception object.
   Throw: [
-    o "THROW Expression",                       -> new ThrowNode($2)
+    o "THROW Expression",                       -> new ThrowNode $2
   ]
 
-  # Parenthetical expressions.
+  # Parenthetical expressions. Note that the **Parenthetical** is a **Value**,
+  # not an **Expression**, so if you need to use an expression in a place
+  # where only values are accepted, wrapping it in parentheses will always do
+  # the trick.
   Parenthetical: [
-    o "( Expression )",                         -> new ParentheticalNode($2)
+    o "( Expression )",                         -> new ParentheticalNode $2
   ]
 
-  # The condition for a while loop.
+  # The condition portion of a while loop.
   WhileSource: [
-    o "WHILE Expression",                       -> new WhileNode($2)
-    o "WHILE Expression WHEN Expression",       -> new WhileNode($2, {filter : $4})
+    o "WHILE Expression",                       -> new WhileNode $2
+    o "WHILE Expression WHEN Expression",       -> new WhileNode $2, {filter : $4}
   ]
 
-  # The while loop. (there is no do..while).
+  # The while loop can either be normal, with a block of expressions to execute,
+  # or postfix, with a single expression. There is no do..while.
   While: [
     o "WhileSource Block",                      -> $1.add_body $2
     o "Expression WhileSource",                 -> $2.add_body $1
   ]
 
-  # Array comprehensions, including guard and current index.
-  # Looks a little confusing, check nodes.rb for the arguments to ForNode.
+  # Array, object, and range comprehensions, at the most generic level.
+  # Comprehensions can either be normal, with a block of expressions to execute,
+  # or postfix, with a single expression.
   For: [
-    o "Expression FOR ForVariables ForSource",  -> new ForNode($1, $4, $3[0], $3[1])
-    o "FOR ForVariables ForSource Block",       -> new ForNode($4, $3, $2[0], $2[1])
+    o "Expression FOR ForVariables ForSource",  -> new ForNode $1, $4, $3[0], $3[1]
+    o "FOR ForVariables ForSource Block",       -> new ForNode $4, $3, $2[0], $2[1]
   ]
 
-  # An array comprehension has variables for the current element and index.
+  # An array or range comprehension has variables for the current element and
+  # (optional) reference to the current index. Or, *key, value*, in the case
+  # of object comprehensions.
   ForVariables: [
     o "Identifier",                             -> [$1]
     o "Identifier , Identifier",                -> [$1, $3]
   ]
 
-  # The source of the array comprehension can optionally be filtered.
+  # The source of a comprehension is an array or object with an optional filter
+  # clause. If it's an array comprehension, you can also choose to step throug
+  # in fixed-size increments.
   ForSource: [
     o "IN Expression",                          -> {source:   $2}
     o "OF Expression",                          -> {source:   $2, object: true}
@@ -394,63 +392,174 @@ grammar: {
     o "ForSource BY Expression",                -> $1.step:   $3; $1
   ]
 
-  # Switch/When blocks.
+  # The CoffeeScript switch/when/else block replaces the JavaScript
+  # switch/case/default by compiling into an if-else chain.
   Switch: [
-    o "SWITCH Expression INDENT Whens OUTDENT", -> $4.rewrite_condition($2)
-    o "SWITCH Expression INDENT Whens ELSE Block OUTDENT", -> $4.rewrite_condition($2).add_else($6, true)
+    o "SWITCH Expression INDENT Whens OUTDENT", -> $4.rewrite_condition $2
+    o "SWITCH Expression INDENT Whens ELSE Block OUTDENT", -> $4.rewrite_condition($2).add_else $6, true
   ]
 
-  # The inner list of whens.
+  # The inner list of whens is left recursive. At code-generation time, the
+  # IfNode will rewrite them into a proper chain.
   Whens: [
-    o "When",                                   -> $1
+    o "When"
     o "Whens When",                             -> $1.push $2
   ]
 
-  # An individual when.
+  # An individual **When** clause, with action.
   When: [
-    o "LEADING_WHEN SimpleArgs Block",          -> new IfNode($2, $3, null, {statement: true})
-    o "LEADING_WHEN SimpleArgs Block TERMINATOR", -> new IfNode($2, $3, null, {statement: true})
+    o "LEADING_WHEN SimpleArgs Block",          -> new IfNode $2, $3, null, {statement: true}
+    o "LEADING_WHEN SimpleArgs Block TERMINATOR", -> new IfNode $2, $3, null, {statement: true}
     o "Comment TERMINATOR When",                -> $3.comment: $1; $3
   ]
 
-  # The most basic form of "if".
+  # The most basic form of *if* is a condition and an action. The following
+  # if-related rules are broken up along these lines in order to avoid
+  # ambiguity.
   IfStart: [
-    o "IF Expression Block",                    -> new IfNode($2, $3)
-    o "IfStart ElsIfs",                         -> $1.add_else($2)
+    o "IF Expression Block",                    -> new IfNode $2, $3
+    o "IfStart ElsIf",                          -> $1.add_else $2
   ]
 
+  # An **IfStart** can optionally be followed by an else block.
   IfBlock: [
-    o "IfStart",                                -> $1
-    o "IfStart ELSE Block",                     -> $1.add_else($3)
+    o "IfStart"
+    o "IfStart ELSE Block",                     -> $1.add_else $3
   ]
 
-  # Multiple elsifs can be chained together.
-  ElsIfs: [
+  # An *else if* continuation of the *if* expression.
+  ElsIf: [
     o "ELSE IF Expression Block",               -> (new IfNode($3, $4)).force_statement()
-    o "ElsIfs ElsIf",                           -> $1.add_else($2)
   ]
 
-  # The full complement of if blocks, including postfix one-liner ifs and unlesses.
+  # The full complement of *if* expressions, including postfix one-liner
+  # *if* and *unless*.
   If: [
-    o "IfBlock",                                -> $1
-    o "Expression IF Expression",               -> new IfNode($3, Expressions.wrap([$1]), null, {statement: true})
-    o "Expression UNLESS Expression",           -> new IfNode($3, Expressions.wrap([$1]), null, {statement: true, invert: true})
+    o "IfBlock"
+    o "Expression IF Expression",               -> new IfNode $3, Expressions.wrap([$1]), null, {statement: true}
+    o "Expression UNLESS Expression",           -> new IfNode $3, Expressions.wrap([$1]), null, {statement: true, invert: true}
+  ]
+
+  # Arithmetic and logical operators, working on one or more operands.
+  # Here they are grouped by order of precedence. The actual precedence rules
+  # are defined at the bottom of the page. It would be shorter if we could
+  # combine most of these rules into a single generic *Operand OpSymbol Operand*
+  # -type rule, but in order to make the precedence binding possible, separate
+  # rules are necessary.
+  Operation: [
+    o "! Expression",                           -> new OpNode '!', $2
+    o "!! Expression",                          -> new OpNode '!!', $2
+    o("- Expression",                           (-> new OpNode('-', $2)), {prec: 'UMINUS'})
+    o("+ Expression",                           (-> new OpNode('+', $2)), {prec: 'UPLUS'})
+    o "NOT Expression",                         -> new OpNode 'not', $2
+    o "~ Expression",                           -> new OpNode '~', $2
+    o "-- Expression",                          -> new OpNode '--', $2
+    o "++ Expression",                          -> new OpNode '++', $2
+    o "DELETE Expression",                      -> new OpNode 'delete', $2
+    o "TYPEOF Expression",                      -> new OpNode 'typeof', $2
+    o "Expression --",                          -> new OpNode '--', $1, null, true
+    o "Expression ++",                          -> new OpNode '++', $1, null, true
+
+    o "Expression * Expression",                -> new OpNode '*', $1, $3
+    o "Expression / Expression",                -> new OpNode '/', $1, $3
+    o "Expression % Expression",                -> new OpNode '%', $1, $3
+
+    o "Expression + Expression",                -> new OpNode '+', $1, $3
+    o "Expression - Expression",                -> new OpNode '-', $1, $3
+
+    o "Expression << Expression",               -> new OpNode '<<', $1, $3
+    o "Expression >> Expression",               -> new OpNode '>>', $1, $3
+    o "Expression >>> Expression",              -> new OpNode '>>>', $1, $3
+    o "Expression & Expression",                -> new OpNode '&', $1, $3
+    o "Expression | Expression",                -> new OpNode '|', $1, $3
+    o "Expression ^ Expression",                -> new OpNode '^', $1, $3
+
+    o "Expression <= Expression",               -> new OpNode '<=', $1, $3
+    o "Expression < Expression",                -> new OpNode '<', $1, $3
+    o "Expression > Expression",                -> new OpNode '>', $1, $3
+    o "Expression >= Expression",               -> new OpNode '>=', $1, $3
+
+    o "Expression == Expression",               -> new OpNode '==', $1, $3
+    o "Expression != Expression",               -> new OpNode '!=', $1, $3
+    o "Expression IS Expression",               -> new OpNode 'is', $1, $3
+    o "Expression ISNT Expression",             -> new OpNode 'isnt', $1, $3
+
+    o "Expression && Expression",               -> new OpNode '&&', $1, $3
+    o "Expression || Expression",               -> new OpNode '||', $1, $3
+    o "Expression AND Expression",              -> new OpNode 'and', $1, $3
+    o "Expression OR Expression",               -> new OpNode 'or', $1, $3
+    o "Expression ? Expression",                -> new OpNode '?', $1, $3
+
+    o "Expression -= Expression",               -> new OpNode '-=', $1, $3
+    o "Expression += Expression",               -> new OpNode '+=', $1, $3
+    o "Expression /= Expression",               -> new OpNode '/=', $1, $3
+    o "Expression *= Expression",               -> new OpNode '*=', $1, $3
+    o "Expression %= Expression",               -> new OpNode '%=', $1, $3
+    o "Expression ||= Expression",              -> new OpNode '||=', $1, $3
+    o "Expression &&= Expression",              -> new OpNode '&&=', $1, $3
+    o "Expression ?= Expression",               -> new OpNode '?=', $1, $3
+
+    o "Expression INSTANCEOF Expression",       -> new OpNode 'instanceof', $1, $3
+    o "Expression IN Expression",               -> new OpNode 'in', $1, $3
   ]
 
 }
 
-# Helpers ==============================================================
+# Precedence
+# ----------
 
-# Make the Jison parser.
-bnf: {}
+# Operators at the top of this list have higher precedence than the ones lower
+# down. Following these rules is what makes `2 + 3 * 4` parse as:
+#
+#     2 + (3 * 4)
+#
+# And not:
+#
+#     (2 + 3) * 4
+operators: [
+  ["left",      '?']
+  ["nonassoc",  'UMINUS', 'UPLUS', 'NOT', '!', '!!', '~', '++', '--']
+  ["left",      '*', '/', '%']
+  ["left",      '+', '-']
+  ["left",      '<<', '>>', '>>>']
+  ["left",      '&', '|', '^']
+  ["left",      '<=', '<', '>', '>=']
+  ["right",     'DELETE', 'INSTANCEOF', 'TYPEOF']
+  ["left",      '==', '!=', 'IS', 'ISNT']
+  ["left",      '&&', '||', 'AND', 'OR']
+  ["right",     '-=', '+=', '/=', '*=', '%=', '||=', '&&=', '?=']
+  ["left",      '.']
+  ["right",     'INDENT']
+  ["left",      'OUTDENT']
+  ["right",     'WHEN', 'LEADING_WHEN', 'IN', 'OF', 'BY', 'THROW']
+  ["right",     'FOR', 'NEW', 'SUPER', 'CLASS']
+  ["left",      'EXTENDS']
+  ["right",     'ASSIGN', 'RETURN']
+  ["right",     '->', '=>', 'UNLESS', 'IF', 'ELSE', 'WHILE']
+]
+
+# Wrapping Up
+# -----------
+
+# Finally, now what we have our **grammar** and our **operators**, we can create
+# our **Jison.Parser**. We do this by processing all of our rules, recording all
+# terminals (every symbol which does not appear as the name of a rule above)
+# as "tokens".
 tokens: []
-for name, non_terminal of grammar
-  bnf[name]: for option in non_terminal
-    for part in option[0].split(" ")
-      if !grammar[part]
-        tokens.push(part)
-    if name == "Root"
-      option[1] = "return " + option[1]
-    option
-tokens: tokens.join(" ")
-exports.parser: new Parser({tokens: tokens, bnf: bnf, operators: operators.reverse(), startSymbol: 'Root'}, {debug: false})
+for name, alternatives of grammar
+  grammar[name]: for alt in alternatives
+    for token in alt[0].split ' '
+      tokens.push token unless grammar[token]
+    alt[1] = "return ${alt[1]}" if name is 'Root'
+    alt
+
+# Initialize the **Parser** with our list of terminal **tokens**, our **grammar**
+# rules, and the name of the root. Reverse the operators because Jison orders
+# precedence from low to high, and we have it high to low
+# (as in [Yacc](http://dinosaur.compilertools.net/yacc/index.html)).
+exports.parser: new Parser {
+  tokens:       tokens.join ' '
+  bnf:          grammar
+  operators:    operators.reverse()
+  startSymbol:  'Root'
+}

src/lexer.coffee

@@ -1,17 +1,407 @@
+# The CoffeeScript Lexer. Uses a series of token-matching regexes to attempt
+# matches against the beginning of the source code. When a match is found,
+# a token is produced, we consume the match, and start again. Tokens are in the
+# form:
+#
+#     [tag, value, line_number]
+#
+# Which is a format that can be fed directly into [Jison](http://github.com/zaach/jison).
+
+# Set up the Lexer for both Node.js and the browser, depending on where we are.
 if process?
   Rewriter: require('./rewriter').Rewriter
 else
   this.exports: this
   Rewriter: this.Rewriter
 
-# The lexer reads a stream of CoffeeScript and divvys it up into tagged
-# tokens. A minor bit of the ambiguity in the grammar has been avoided by
+# The Lexer Class
+# ---------------
+
+# The Lexer class reads a stream of CoffeeScript and divvys it up into tagged
+# tokens. Some potential ambiguity in the grammar has been avoided by
 # pushing some extra smarts into the Lexer.
-exports.Lexer: lex: ->
+exports.Lexer: class Lexer
 
-# Constants ============================================================
+  # **tokenize** is the Lexer's main method. Scan by attempting to match tokens
+  # one at a time, using a regular expression anchored at the start of the
+  # remaining code, or a custom recursive token-matching method
+  # (for interpolations). When the next token has been recorded, we move forward
+  # within the code past the token, and begin again.
+  #
+  # Each tokenizing method is responsible for incrementing `@i` by the number of
+  # characters it has consumed. `@i` can be thought of as our finger on the page
+  # of source.
+  #
+  # Before returning the token stream, run it through the [Rewriter](rewriter.html)
+  # unless explicitly asked not to.
+  tokenize: (code, options) ->
+    o        : options or {}
+    @code    : code         # The remainder of the source code.
+    @i       : 0            # Current character position we're parsing.
+    @line    : o.line or 0  # The current line.
+    @indent  : 0            # The current indentation level.
+    @indents : []           # The stack of all current indentation levels.
+    @tokens  : []           # Stream of parsed tokens in the form ['TYPE', value, line]
+    while @i < @code.length
+      @chunk: @code.slice(@i)
+      @extract_next_token()
+    @close_indentation()
+    return @tokens if o.rewrite is off
+    (new Rewriter()).rewrite @tokens
 
-# Keywords that CoffeScript shares in common with JS.
+  # At every position, run through this list of attempted matches,
+  # short-circuiting if any of them succeed. Their order determines precedence:
+  # `@literal_token` is the fallback catch-all.
+  extract_next_token: ->
+    return if @identifier_token()
+    return if @number_token()
+    return if @heredoc_token()
+    return if @regex_token()
+    return if @comment_token()
+    return if @line_token()
+    return if @whitespace_token()
+    return if @js_token()
+    return if @string_token()
+    return    @literal_token()
+
+  # Tokenizers
+  # ----------
+
+  # Matches identifying literals: variables, keywords, method names, etc.
+  # Check to ensure that JavaScript reserved words aren't being used as
+  # identifiers. Because CoffeeScript reserves a handful of keywords that are
+  # allowed in JavaScript, we're careful not to tag them as keywords when
+  # referenced as property names here, so you can still do `jQuery.is()` even
+  # though `is` means `===` otherwise.
+  identifier_token: ->
+    return false unless id: @match IDENTIFIER, 1
+    @name_access_type()
+    tag: 'IDENTIFIER'
+    tag: id.toUpperCase() if include(KEYWORDS, id) and
+      not (include(ACCESSORS, @tag(0)) and not @prev().spaced)
+    @identifier_error id  if include RESERVED, id
+    tag: 'LEADING_WHEN'   if tag is 'WHEN' and include BEFORE_WHEN, @tag()
+    @token(tag, id)
+    @i += id.length
+    true
+
+  # Matches numbers, including decimals, hex, and exponential notation.
+  number_token: ->
+    return false unless number: @match NUMBER, 1
+    @token 'NUMBER', number
+    @i += number.length
+    true
+
+  # Matches strings, including multi-line strings. Ensures that quotation marks
+  # are balanced within the string's contents, and within nested interpolations.
+  string_token: ->
+    return false unless starts(@chunk, '"') or starts(@chunk, "'")
+    string: @balanced_token ['"', '"'], ['${', '}']
+    string: @balanced_token ["'", "'"] unless string
+    return false unless string
+    @interpolate_string string.replace STRING_NEWLINES, " \\\n"
+    @line += count string, "\n"
+    @i += string.length
+    true
+
+  # Matches heredocs, adjusting indentation to the correct level, as heredocs
+  # preserve whitespace, but ignore indentation to the left.
+  heredoc_token: ->
+    return false unless match = @chunk.match(HEREDOC)
+    doc: @sanitize_heredoc match[2] or match[4]
+    @token 'STRING', "\"$doc\""
+    @line += count match[1], "\n"
+    @i += match[1].length
+    true
+
+  # Matches JavaScript interpolated directly into the source via backticks.
+  js_token: ->
+    return false unless starts @chunk, '`'
+    return false unless script: @balanced_token ['`', '`']
+    @token 'JS', script.replace(JS_CLEANER, '')
+    @i += script.length
+    true
+
+  # Matches regular expression literals. Lexing regular expressions is difficult
+  # to distinguish from division, so we borrow some basic heuristics from
+  # JavaScript and Ruby.
+  regex_token: ->
+    return false unless regex: @match REGEX, 1
+    return false if include NOT_REGEX, @tag()
+    @token 'REGEX', regex
+    @i += regex.length
+    true
+
+  # Matches a token in which which the passed delimiter pairs must be correctly
+  # balanced (ie. strings, JS literals).
+  balanced_token: (delimited...) ->
+    @balanced_string @chunk, delimited...
+
+  # Matches and conumes comments. We pass through comments into JavaScript,
+  # so they're treated as real tokens, like any other part of the language.
+  comment_token: ->
+    return false unless comment: @match COMMENT, 1
+    @line += (comment.match(MULTILINER) or []).length
+    lines: comment.replace(COMMENT_CLEANER, '').split(MULTILINER)
+    @token 'COMMENT', compact lines
+    @token 'TERMINATOR', "\n"
+    @i += comment.length
+    true
+
+  # Matches newlines, indents, and outdents, and determines which is which.
+  # If we can detect that the current line is continued onto the the next line,
+  # then the newline is suppressed:
+  #
+  #     elements
+  #       .each( ... )
+  #       .map( ... )
+  #
+  # Keeps track of the level of indentation, because a single outdent token
+  # can close multiple indents, so we need to know how far in we happen to be.
+  line_token: ->
+    return false unless indent: @match MULTI_DENT, 1
+    @line += indent.match(MULTILINER).length
+    @i    += indent.length
+    prev: @prev(2)
+    size: indent.match(LAST_DENTS).reverse()[0].match(LAST_DENT)[1].length
+    next_character: @chunk.match(MULTI_DENT)[4]
+    no_newlines: next_character is '.' or (@value() and @value().match(NO_NEWLINE) and
+      prev and (prev[0] isnt '.') and not @value().match(CODE))
+    if size is @indent
+      return @suppress_newlines() if no_newlines
+      return @newline_token(indent)
+    else if size > @indent
+      return @suppress_newlines() if no_newlines
+      diff: size - @indent
+      @token 'INDENT', diff
+      @indents.push diff
+    else
+      @outdent_token @indent - size, no_newlines
+    @indent: size
+    true
+
+  # Record an outdent token or multiple tokens, if we happen to be moving back
+  # inwards past several recorded indents.
+  outdent_token: (move_out, no_newlines) ->
+    while move_out > 0 and @indents.length
+      last_indent: @indents.pop()
+      @token 'OUTDENT', last_indent
+      move_out -= last_indent
+    @token 'TERMINATOR', "\n" unless @tag() is 'TERMINATOR' or no_newlines
+    true
+
+  # Matches and consumes non-meaningful whitespace. Tag the previous token
+  # as being "spaced", because there are some cases where it makes a difference.
+  whitespace_token: ->
+    return false unless space: @match WHITESPACE, 1
+    prev: @prev()
+    prev.spaced: true if prev
+    @i += space.length
+    true
+
+  # Generate a newline token. Consecutive newlines get merged together.
+  newline_token: (newlines) ->
+    @token 'TERMINATOR', "\n" unless @tag() is 'TERMINATOR'
+    true
+
+  # Use a `\` at a line-ending to suppress the newline.
+  # The slash is removed here once its job is done.
+  suppress_newlines: ->
+    @tokens.pop() if @value() is "\\"
+    true
+
+  # We treat all other single characters as a token. Eg.: `( ) , . !`
+  # Multi-character operators are also literal tokens, so that Jison can assign
+  # the proper order of operations. There are some symbols that we tag specially
+  # here. `;` and newlines are both treated as a `TERMINATOR`, we distinguish
+  # parentheses that indicate a method call from regular parentheses, and so on.
+  literal_token: ->
+    match: @chunk.match(OPERATOR)
+    value: match and match[1]
+    @tag_parameters() if value and value.match(CODE)
+    value ||= @chunk.substr(0, 1)
+    not_spaced: not @prev() or not @prev().spaced
+    tag: value
+    if value.match(ASSIGNMENT)
+      tag: 'ASSIGN'
+      @assignment_error() if include JS_FORBIDDEN, @value
+    else if value is ';'
+      tag: 'TERMINATOR'
+    else if value is '[' and @tag() is '?' and not_spaced
+      tag: 'SOAKED_INDEX_START'
+      @soaked_index: true
+      @tokens.pop()
+    else if value is ']' and @soaked_index
+      tag: 'SOAKED_INDEX_END'
+      @soaked_index: false
+    else if include(CALLABLE, @tag()) and not_spaced
+      tag: 'CALL_START'  if value is '('
+      tag: 'INDEX_START' if value is '['
+    @token tag, value
+    @i += value.length
+    true
+
+  # Token Manipulators
+  # ------------------
+
+  # As we consume a new `IDENTIFIER`, look at the previous token to determine
+  # if it's a special kind of accessor.
+  name_access_type: ->
+    @tag(1, 'PROTOTYPE_ACCESS') if @value() is '::'
+    if @value() is '.' and not (@value(2) is '.')
+      if @tag(2) is '?'
+        @tag(1, 'SOAK_ACCESS')
+        @tokens.splice(-2, 1)
+      else
+        @tag 1, 'PROPERTY_ACCESS'
+
+  # Sanitize a heredoc by escaping internal double quotes and erasing all
+  # external indentation on the left-hand side.
+  sanitize_heredoc: (doc) ->
+    indent: (doc.match(HEREDOC_INDENT) or ['']).sort()[0]
+    doc.replace(new RegExp("^" +indent, 'gm'), '')
+       .replace(MULTILINER, "\\n")
+       .replace(/"/g, '\\"')
+
+  # A source of ambiguity in our grammar used to be parameter lists in function
+  # definitions versus argument lists in function calls. Walk backwards, tagging
+  # parameters specially in order to make things easier for the parser.
+  tag_parameters: ->
+    return if @tag() isnt ')'
+    i: 0
+    while true
+      i += 1
+      tok: @prev(i)
+      return if not tok
+      switch tok[0]
+        when 'IDENTIFIER' then tok[0]: 'PARAM'
+        when ')'          then tok[0]: 'PARAM_END'
+        when '('          then return tok[0]: 'PARAM_START'
+    true
+
+  # Close up all remaining open blocks at the end of the file.
+  close_indentation: ->
+    @outdent_token(@indent)
+
+  # The error for when you try to use a forbidden word in JavaScript as
+  # an identifier.
+  identifier_error: (word) ->
+    throw new Error "SyntaxError: Reserved word \"$word\" on line ${@line + 1}"
+
+  # The error for when you try to assign to a reserved word in JavaScript,
+  # like "function" or "default".
+  assignment_error: ->
+    throw new Error "SyntaxError: Reserved word \"${@value()}\" on line ${@line + 1} can't be assigned"
+
+  # Matches a balanced group such as a single or double-quoted string. Pass in
+  # a series of delimiters, all of which must be nested correctly within the
+  # contents of the string. This method allows us to have strings within
+  # interpolations within strings etc...
+  balanced_string: (str, delimited...) ->
+    levels: []
+    i: 0
+    while i < str.length
+      for pair in delimited
+        [open, close]: pair
+        if levels.length and starts str, '\\', i
+          i += 1
+          break
+        else if levels.length and starts(str, close, i) and levels[levels.length - 1] is pair
+          levels.pop()
+          i += close.length - 1
+          i += 1 unless levels.length
+          break
+        else if starts str, open, i
+          levels.push(pair)
+          i += open.length - 1
+          break
+      break unless levels.length
+      i += 1
+    throw new Error "SyntaxError: Unterminated ${levels.pop()[0]} starting on line ${@line + 1}" if levels.length
+    return false if i is 0
+    return str.substring(0, i)
+
+  # Expand variables and expressions inside double-quoted strings using
+  # [ECMA Harmony's interpolation syntax](http://wiki.ecmascript.org/doku.php?id=strawman:string_interpolation)
+  # for substitution of bare variables as well as arbitrary expressions.
+  #
+  #     "Hello $name."
+  #     "Hello ${name.capitalize()}."
+  #
+  # If it encounters an interpolation, this method will recursively create a
+  # new Lexer, tokenize the interpolated contents, and merge them into the
+  # token stream.
+  interpolate_string: (str) ->
+    if str.length < 3 or not starts str, '"'
+      @token 'STRING', str
+    else
+      lexer:    new Lexer()
+      tokens:   []
+      quote:    str.substring(0, 1)
+      [i, pi]:  [1, 1]
+      while i < str.length - 1
+        if starts str, '\\', i
+          i += 1
+        else if match: str.substring(i).match INTERPOLATION
+          [group, interp]: match
+          interp: "this.${ interp.substring(1) }" if starts interp, '@'
+          tokens.push ['STRING', "$quote${ str.substring(pi, i) }$quote"] if pi < i
+          tokens.push ['IDENTIFIER', interp]
+          i += group.length - 1
+          pi: i + 1
+        else if (expr: @balanced_string str.substring(i), ['${', '}'])
+          tokens.push ['STRING', "$quote${ str.substring(pi, i) }$quote"] if pi < i
+          inner: expr.substring(2, expr.length - 1)
+          if inner.length
+            nested: lexer.tokenize "($inner)", {rewrite: no, line: @line}
+            nested.pop()
+            tokens.push ['TOKENS', nested]
+          else
+            tokens.push ['STRING', "$quote$quote"]
+          i += expr.length - 1
+          pi: i + 1
+        i += 1
+      tokens.push ['STRING', "$quote${ str.substring(pi, i) }$quote"] if pi < i and pi < str.length - 1
+      for each, i in tokens
+        if each[0] is 'TOKENS'
+          @tokens: @tokens.concat each[1]
+        else
+          @token each[0], each[1]
+        @token '+', '+' if i < tokens.length - 1
+
+  # Helpers
+  # -------
+
+  # Add a token to the results, taking note of the line number.
+  token: (tag, value) ->
+    @tokens.push([tag, value, @line])
+
+  # Peek at a tag in the current token stream.
+  tag: (index, tag) ->
+    return unless tok: @prev(index)
+    return tok[0]: tag if tag?
+    tok[0]
+
+  # Peek at a value in the current token stream.
+  value: (index, val) ->
+    return unless tok: @prev(index)
+    return tok[1]: val if val?
+    tok[1]
+
+  # Peek at a previous token, entire.
+  prev: (index) ->
+    @tokens[@tokens.length - (index or 1)]
+
+  # Attempt to match a string against the current chunk, returning the indexed
+  # match if successful, and `false` otherwise.
+  match: (regex, index) ->
+    return false unless m: @chunk.match(regex)
+    if m then m[index] else false
+
+# Constants
+# ---------
+
+# Keywords that CoffeeScript shares in common with JavaScript.
 JS_KEYWORDS: [
   "if", "else",
   "true", "false",
@@ -20,10 +410,11 @@ JS_KEYWORDS: [
   "break", "continue",
   "for", "in", "while",
   "delete", "instanceof", "typeof",
-  "switch", "super", "extends"
+  "switch", "super", "extends", "class"
 ]
 
-# CoffeeScript-only keywords -- which we're more relaxed about allowing.
+# CoffeeScript-only keywords, which we're more relaxed about allowing. They can't
+# be used standalone, but you can reference them as an attached property.
 COFFEE_KEYWORDS: [
   "then", "unless",
   "yes", "no", "on", "off",
@@ -31,34 +422,37 @@ COFFEE_KEYWORDS: [
   "of", "by", "where", "when"
 ]
 
-# The list of keywords passed verbatim to the parser.
+# The combined list of keywords is the superset that gets passed verbatim to
+# the parser.
 KEYWORDS: JS_KEYWORDS.concat COFFEE_KEYWORDS
 
-# The list of keywords that are reserved by JavaScript, but not used, and aren't
-# used by CoffeeScript. Using these will throw an error at compile time.
+# The list of keywords that are reserved by JavaScript, but not used, or are
+# used by CoffeeScript internally. We throw an error when these are encountered,
+# to avoid having a JavaScript error at runtime.
 RESERVED: [
-  "case", "default", "do", "function", "var", "void", "with", "class"
-  "const", "let", "debugger", "enum", "export", "import", "native"
+  "case", "default", "do", "function", "var", "void", "with"
+  "const", "let", "debugger", "enum", "export", "import", "native",
+  "__extends", "__hasProp"
 ]
 
-# JavaScript keywords and reserved words together, excluding CoffeeScript ones.
+# The superset of both JavaScript keywords and reserved words, none of which may
+# be used as identifiers or properties.
 JS_FORBIDDEN: JS_KEYWORDS.concat RESERVED
 
-# Token matching regexes. (keep the IDENTIFIER regex in sync with AssignNode.)
-IDENTIFIER : /^([a-zA-Z$_](\w|\$)*)/
-NUMBER     : /^(\b((0(x|X)[0-9a-fA-F]+)|([0-9]+(\.[0-9]+)?(e[+\-]?[0-9]+)?)))\b/i
-STRING     : /^(""|''|"([\s\S]*?)([^\\]|\\\\)"|'([\s\S]*?)([^\\]|\\\\)')/
-HEREDOC    : /^("{6}|'{6}|"{3}\n?([\s\S]*?)\n?([ \t]*)"{3}|'{3}\n?([\s\S]*?)\n?([ \t]*)'{3})/
-JS         : /^(``|`([\s\S]*?)([^\\]|\\\\)`)/
-OPERATOR   : /^([+\*&|\/\-%=<>:!?]+)/
-WHITESPACE : /^([ \t]+)/
-COMMENT    : /^(((\n?[ \t]*)?#[^\n]*)+)/
-CODE       : /^((-|=)>)/
-REGEX      : /^(\/(.*?)([^\\]|\\\\)\/[imgy]{0,4})/
-MULTI_DENT : /^((\n([ \t]*))+)(\.)?/
-LAST_DENTS : /\n([ \t]*)/g
-LAST_DENT  : /\n([ \t]*)/
-ASSIGNMENT : /^(:|=)$/
+# Token matching regexes.
+IDENTIFIER    : /^([a-zA-Z$_](\w|\$)*)/
+NUMBER        : /^(\b((0(x|X)[0-9a-fA-F]+)|([0-9]+(\.[0-9]+)?(e[+\-]?[0-9]+)?)))\b/i
+HEREDOC       : /^("{6}|'{6}|"{3}\n?([\s\S]*?)\n?([ \t]*)"{3}|'{3}\n?([\s\S]*?)\n?([ \t]*)'{3})/
+INTERPOLATION : /^\$([a-zA-Z_@]\w*(\.\w+)*)/
+OPERATOR      : /^([+\*&|\/\-%=<>:!?]+)/
+WHITESPACE    : /^([ \t]+)/
+COMMENT       : /^(((\n?[ \t]*)?#[^\n]*)+)/
+CODE          : /^((-|=)>)/
+REGEX         : /^(\/(\S.*?)?([^\\]|\\\\)\/[imgy]{0,4})/
+MULTI_DENT    : /^((\n([ \t]*))+)(\.)?/
+LAST_DENTS    : /\n([ \t]*)/g
+LAST_DENT     : /\n([ \t]*)/
+ASSIGNMENT    : /^(:|=)$/
 
 # Token cleaning regexes.
 JS_CLEANER      : /(^`|`$)/g
@@ -70,258 +464,47 @@ HEREDOC_INDENT  : /^[ \t]+/mg
 
 # Tokens which a regular expression will never immediately follow, but which
 # a division operator might.
+#
 # See: http://www.mozilla.org/js/language/js20-2002-04/rationale/syntax.html#regular-expressions
+#
+# Our list is shorter, due to sans-parentheses method calls.
 NOT_REGEX: [
-  'IDENTIFIER', 'NUMBER', 'REGEX', 'STRING',
-  ')', '++', '--', ']', '}',
-  'FALSE', 'NULL', 'TRUE'
+  'NUMBER', 'REGEX', '++', '--', 'FALSE', 'NULL', 'TRUE'
 ]
 
-# Tokens which could legitimately be invoked or indexed.
+# Tokens which could legitimately be invoked or indexed. A opening
+# parentheses or bracket following these tokens will be recorded as the start
+# of a function invocation or indexing operation.
 CALLABLE: ['IDENTIFIER', 'SUPER', ')', ']', '}', 'STRING', '@']
 
 # Tokens that indicate an access -- keywords immediately following will be
 # treated as identifiers.
 ACCESSORS: ['PROPERTY_ACCESS', 'PROTOTYPE_ACCESS', 'SOAK_ACCESS', '@']
 
-# Tokens that, when immediately preceding a 'WHEN', indicate that its leading.
+# Tokens that, when immediately preceding a `WHEN`, indicate that the `WHEN`
+# occurs at the start of a line. We disambiguate these from trailing whens to
+# avoid an ambiguity in the grammar.
 BEFORE_WHEN: ['INDENT', 'OUTDENT', 'TERMINATOR']
 
-# Scan by attempting to match tokens one character at a time. Slow and steady.
-lex::tokenize: (code) ->
-  @code    : code       # Cleanup code by remove extra line breaks, TODO: chomp
-  @i       : 0          # Current character position we're parsing
-  @line    : 1          # The current line.
-  @indent  : 0          # The current indent level.
-  @indents : []         # The stack of all indent levels we are currently within.
-  @tokens  : []         # Collection of all parsed tokens in the form [:TOKEN_TYPE, value]
-  while @i < @code.length
-    @chunk: @code.slice(@i)
-    @extract_next_token()
-  @close_indentation()
-  (new Rewriter()).rewrite @tokens
+# Utility Functions
+# -----------------
 
-# At every position, run through this list of attempted matches,
-# short-circuiting if any of them succeed.
-lex::extract_next_token: ->
-  return if @identifier_token()
-  return if @number_token()
-  return if @heredoc_token()
-  return if @string_token()
-  return if @js_token()
-  return if @regex_token()
-  return if @indent_token()
-  return if @comment_token()
-  return if @whitespace_token()
-  return    @literal_token()
+# Does a list include a value?
+include: (list, value) ->
+  list.indexOf(value) >= 0
 
-# Tokenizers ==========================================================
+# Peek at the beginning of a given string to see if it matches a sequence.
+starts: (string, literal, start) ->
+  string.substring(start, (start or 0) + literal.length) is literal
 
-# Matches identifying literals: variables, keywords, method names, etc.
-lex::identifier_token: ->
-  return false unless id: @match IDENTIFIER, 1
-  @tag(1, 'PROTOTYPE_ACCESS') if @value() is '::'
-  if @value() is '.' and not (@value(2) is '.')
-    if @tag(2) is '?'
-      @tag(1, 'SOAK_ACCESS')
-      @tokens.splice(-2, 1)
-    else
-      @tag(1, 'PROPERTY_ACCESS')
-  tag: 'IDENTIFIER'
-  tag:  id.toUpperCase() if KEYWORDS.indexOf(id) >= 0 and
-    not ((ACCESSORS.indexOf(@tag()) >= 0) and not @prev().spaced)
-  throw new Error('SyntaxError: Reserved word "' + id + '" on line ' + @line) if RESERVED.indexOf(id) >= 0
-  tag: 'LEADING_WHEN' if tag is 'WHEN' and BEFORE_WHEN.indexOf(@tag()) >= 0
-  @token(tag, id)
-  @i += id.length
-  true
+# Trim out all falsy values from an array.
+compact: (array) -> item for item in array when item
 
-# Matches numbers, including decimals, hex, and exponential notation.
-lex::number_token: ->
-  return false unless number: @match NUMBER, 1
-  @token 'NUMBER', number
-  @i += number.length
-  true
-
-# Matches strings, including multi-line strings.
-lex::string_token: ->
-  return false unless string: @match STRING, 1
-  escaped: string.replace STRING_NEWLINES, " \\\n"
-  @token 'STRING', escaped
-  @line += @count string, "\n"
-  @i += string.length
-  true
-
-# Matches heredocs, adjusting indentation to the correct level.
-lex::heredoc_token: ->
-  return false unless match = @chunk.match(HEREDOC)
-  doc: match[2] or match[4]
-  indent: (doc.match(HEREDOC_INDENT) or ['']).sort()[0]
-  doc: doc.replace(new RegExp("^" + indent, 'gm'), '')
-          .replace(MULTILINER, "\\n")
-          .replace('"', '\\"')
-  @token 'STRING', '"' + doc + '"'
-  @line += @count match[1], "\n"
-  @i += match[1].length
-  true
-
-# Matches interpolated JavaScript.
-lex::js_token: ->
-  return false unless script: @match JS, 1
-  @token 'JS', script.replace(JS_CLEANER, '')
-  @i += script.length
-  true
-
-# Matches regular expression literals.
-lex::regex_token: ->
-  return false unless regex: @match REGEX, 1
-  return false if NOT_REGEX.indexOf(@tag()) >= 0
-  @token 'REGEX', regex
-  @i += regex.length
-  true
-
-# Matches and conumes comments.
-lex::comment_token: ->
-  return false unless comment: @match COMMENT, 1
-  @line += (comment.match(MULTILINER) or []).length
-  @token 'COMMENT', comment.replace(COMMENT_CLEANER, '').split(MULTILINER)
-  @token 'TERMINATOR', "\n"
-  @i += comment.length
-  true
-
-# Record tokens for indentation differing from the previous line.
-lex::indent_token: ->
-  return false unless indent: @match MULTI_DENT, 1
-  @line += indent.match(MULTILINER).length
-  @i    += indent.length
-  next_character: @chunk.match(MULTI_DENT)[4]
-  prev: @prev(2)
-  no_newlines: next_character is '.' or (@value() and @value().match(NO_NEWLINE) and prev and (prev[0] isnt '.') and not @value().match(CODE))
-  return @suppress_newlines(indent) if no_newlines
-  size: indent.match(LAST_DENTS).reverse()[0].match(LAST_DENT)[1].length
-  return @newline_token(indent) if size is @indent
-  if size > @indent
-    diff: size - @indent
-    @token 'INDENT', diff
-    @indents.push diff
-  else
-    @outdent_token @indent - size
-  @indent: size
-  true
-
-# Record an oudent token or tokens, if we're moving back inwards past
-# multiple recorded indents.
-lex::outdent_token: (move_out) ->
-  while move_out > 0 and @indents.length
-    last_indent: @indents.pop()
-    @token 'OUTDENT', last_indent
-    move_out -= last_indent
-  @token 'TERMINATOR', "\n" unless @tag() is 'TERMINATOR'
-  true
-
-# Matches and consumes non-meaningful whitespace.
-lex::whitespace_token: ->
-  return false unless space: @match WHITESPACE, 1
-  prev: @prev()
-  prev.spaced: true if prev
-  @i += space.length
-  true
-
-# Multiple newlines get merged together.
-# Use a trailing \ to escape newlines.
-lex::newline_token: (newlines) ->
-  @token 'TERMINATOR', "\n" unless @tag() is 'TERMINATOR'
-  true
-
-# Tokens to explicitly escape newlines are removed once their job is done.
-lex::suppress_newlines: (newlines) ->
-  @tokens.pop() if @value() is "\\"
-  true
-
-# We treat all other single characters as a token. Eg.: ( ) , . !
-# Multi-character operators are also literal tokens, so that Racc can assign
-# the proper order of operations.
-lex::literal_token: ->
-  match: @chunk.match(OPERATOR)
-  value: match and match[1]
-  @tag_parameters() if value and value.match(CODE)
-  value ||= @chunk.substr(0, 1)
-  not_spaced: not @prev() or not @prev().spaced
-  tag: value
-  if value.match(ASSIGNMENT)
-    tag: 'ASSIGN'
-    throw new Error('SyntaxError: Reserved word "' + @value() + '" on line ' + @line + ' can\'t be assigned') if JS_FORBIDDEN.indexOf(@value()) >= 0
-  else if value is ';'
-    tag: 'TERMINATOR'
-  else if value is '[' and @tag() is '?' and not_spaced
-    tag: 'SOAKED_INDEX_START'
-    @soaked_index: true
-    @tokens.pop()
-  else if value is ']' and @soaked_index
-    tag: 'SOAKED_INDEX_END'
-    @soaked_index: false
-  else if CALLABLE.indexOf(@tag()) >= 0 and not_spaced
-    tag: 'CALL_START'  if value is '('
-    tag: 'INDEX_START' if value is '['
-  @token tag, value
-  @i += value.length
-  true
-
-# Helpers =============================================================
-
-# Add a token to the results, taking note of the line number.
-lex::token: (tag, value) ->
-  @tokens.push([tag, value, @line])
-
-# Look at a tag in the current token stream.
-lex::tag: (index, tag) ->
-  return unless tok: @prev(index)
-  return tok[0]: tag if tag?
-  tok[0]
-
-# Look at a value in the current token stream.
-lex::value: (index, val) ->
-  return unless tok: @prev(index)
-  return tok[1]: val if val?
-  tok[1]
-
-# Look at a previous token.
-lex::prev: (index) ->
-  @tokens[@tokens.length - (index or 1)]
-
-# Count the occurences of a character in a string.
-lex::count: (string, letter) ->
+# Count the number of occurences of a character in a string.
+count: (string, letter) ->
   num: 0
   pos: string.indexOf(letter)
   while pos isnt -1
     num += 1
     pos: string.indexOf(letter, pos + 1)
   num
-
-# Attempt to match a string against the current chunk, returning the indexed
-# match.
-lex::match: (regex, index) ->
-  return false unless m: @chunk.match(regex)
-  if m then m[index] else false
-
-# A source of ambiguity in our grammar was parameter lists in function
-# definitions (as opposed to argument lists in function calls). Tag
-# parameter identifiers in order to avoid this. Also, parameter lists can
-# make use of splats.
-lex::tag_parameters: ->
-  return if @tag() isnt ')'
-  i: 0
-  while true
-    i += 1
-    tok: @prev(i)
-    return if not tok
-    switch tok[0]
-      when 'IDENTIFIER' then tok[0]: 'PARAM'
-      when ')'          then tok[0]: 'PARAM_END'
-      when '('          then return tok[0]: 'PARAM_START'
-  true
-
-# Close up all remaining open blocks. IF the first token is an indent,
-# axe it.
-lex::close_indentation: ->
-  @outdent_token(@indent)

src/narwhal.coffee

@@ -1,42 +0,0 @@
-# The Narwhal-compatibility wrapper for CoffeeScript.
-
-# Require external dependencies.
-os:       require 'os'
-file:     require 'file'
-coffee:   require './coffee-script'
-
-# Alias print to "puts", for Node.js compatibility:
-puts: print
-
-# Compile a string of CoffeeScript into JavaScript.
-exports.compile: (source) ->
-  coffee.compile source
-
-# Compile a given CoffeeScript file into JavaScript.
-exports.compileFile: (path) ->
-  coffee.compile file.read path
-
-# Make a factory for the CoffeeScript environment.
-exports.makeNarwhalFactory: (path) ->
-  code: exports.compileFile path
-  factoryText: "function(require,exports,module,system,print){" + code + "/**/\n}"
-  if system.engine is "rhino"
-    Packages.org.mozilla.javascript.Context.getCurrentContext().compileFunction(global, factoryText, path, 0, null)
-  else
-    # eval requires parentheses, but parentheses break compileFunction.
-    eval "(" + factoryText + ")"
-
-# The Narwhal loader for '.coffee' files.
-factories: {}
-loader:    {}
-
-# Reload the coffee-script environment from source.
-loader.reload: (topId, path) ->
-  factories[topId]: ->
-    exports.makeNarwhalFactory path
-
-# Ensure that the coffee-script environment is loaded.
-loader.load: (topId, path) ->
-  factories[topId] ||= this.reload topId, path
-
-require.loader.loaders.unshift [".coffee", loader]