From aae2405de4b81b01d6ebc48c21cab92539e28681 Mon Sep 17 00:00:00 2001 From: Jeremy Ashkenas Date: Wed, 31 Mar 2010 00:04:14 -0400 Subject: [PATCH] removing all of the 'type' tags from the Nodes. Simply using constructor.name instead. --- documentation/docs/nodes.html | 21 +++++++--------- lib/nodes.js | 39 ++++++----------------------- src/nodes.coffee | 46 ++++++++--------------------------- 3 files changed, 26 insertions(+), 80 deletions(-) diff --git a/documentation/docs/nodes.html b/documentation/docs/nodes.html index a71e2295..817c9f02 100644 --- a/documentation/docs/nodes.html +++ b/documentation/docs/nodes.html @@ -2,13 +2,13 @@ nodes are created as the result of actions in the grammar, 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 compile() on the root.

                                                                                   
                 #               
               
Set up for both Node.js and the browser, by
-including the Scope class.
                                         
if process?
+including the Scope class and the helper functions.
                                         
if process?
   Scope:   require('./scope').Scope
   helpers: require('./helpers').helpers
 else
   this.exports: this
   helpers:      this.helpers
-  Scope:        this.Scope
                                                                                   
                 #               
               
Import the helpers we need.
                                         
compact: helpers.compact
+  Scope:        this.Scope
                                                                                   
                 #               
               
Import the helpers we plan to use.
                                         
compact: helpers.compact
 flatten: helpers.flatten
 merge:   helpers.merge
 del:     helpers.del
                                                                                   
                 #               
               
Helper function that marks a node as a JavaScript statement, or as a
@@ -926,7 +926,7 @@ in which case, no dice.
                          
 
 }
                                                                                   
                 #               
               
Utility Functions
                                         
UTILITIES: {
                                                                                   
                 #               
               
Correctly set up a prototype chain for inheritance, including a reference
 to the superclass for super() calls. See:
-goog.inherits
                                         
  __extends:  """
+goog.inherits.
                                         
  __extends:  """
               function(child, parent) {
                   var ctor = function(){ };
                   ctor.prototype = parent.prototype;
@@ -935,21 +935,18 @@ to the superclass for super() calls. See:
                   child.prototype.constructor = child;
                 }
               """
                                                                                   
                 #               
               
Bind a function to a calling context, optionally including curried arguments.
-See Underscore's implementation
                                         
  __bind:   """
+See Underscore's implementation.
                                         
  __bind:   """
             function(func, obj, args) {
                 return function() {
                   return func.apply(obj || {}, args ? args.concat(__slice.call(arguments, 0)) : arguments);
                 };
               }
-            """
+            """
                                                                                   
                 #               
               
Shortcuts to speed up the lookup time for native functions.
                                         
  __hasProp: 'Object.prototype.hasOwnProperty'
+  __slice: 'Array.prototype.slice'
 
-  __hasProp:'Object.prototype.hasOwnProperty'
-
-  __slice:  'Array.prototype.slice'
-
-}
                                                                                   
                 #               
               
Constants
                                         
                                                                                   
                 #               
               
Tabs are two spaces for pretty printing.
                                         
TAB: '  '
                                                                                   
                 #               
               
Trim out all trailing whitespace, so that the generated code plays nice
-with Git.
                                         
TRAILING_WHITESPACE: /\s+$/gm
                                                                                   
                 #               
               
Keep this identifier regex in sync with the Lexer.
                                         
IDENTIFIER: /^[a-zA-Z\$_](\w|\$)*$/
                                                                                   
                 #               
               
Utility Functions
                                         
                                                                                   
                 #               
               
Handy helper for a generating LiteralNode.
                                         
literal: (name) ->
-  new LiteralNode(name)
                                                                                   
                 #               
               
Helper for ensuring that utility functions are assigned at the top level.
                                         
utility: (name) ->
+}
                                                                                   
                 #               
               
Constants
                                         
                                                                                   
                 #               
               
Tabs are two spaces for pretty printing.
                                         
TAB: '  '
                                                                                   
                 #               
               
Trim out all trailing whitespace, so that the generated code plays nice
+with Git.
                                         
TRAILING_WHITESPACE: /\s+$/gm
                                                                                   
                 #               
               
Keep this identifier regex in sync with the Lexer.
                                         
IDENTIFIER: /^[a-zA-Z\$_](\w|\$)*$/
                                                                                   
                 #               
               
Utility Functions
                                         
                                                                                   
                 #               
               
Handy helper for a generating LiteralNode.
                                         
literal: (name) ->
+  new LiteralNode(name)
                                                                                   
                 #               
               
Helper for ensuring that utility functions are assigned at the top level.
                                         
utility: (name) ->
   ref: "__$name"
   Scope.root.assign ref, UTILITIES[ref]
   ref
diff --git a/lib/nodes.js b/lib/nodes.js
index f5af457a..60028d9e 100644
--- a/lib/nodes.js
+++ b/lib/nodes.js
@@ -16,7 +16,7 @@
   // 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 `compile()` on the root.
   // Set up for both **Node.js** and the browser, by
-  // including the [Scope](scope.html) class.
+  // including the [Scope](scope.html) class and the [helper](helpers.html) functions.
   if ((typeof process !== "undefined" && process !== null)) {
     Scope = require('./scope').Scope;
     helpers = require('./helpers').helpers;
@@ -25,7 +25,7 @@
     helpers = this.helpers;
     Scope = this.Scope;
   }
-  // Import the helpers we need.
+  // Import the helpers we plan to use.
   compact = helpers.compact;
   flatten = helpers.flatten;
   merge = helpers.merge;
@@ -158,7 +158,7 @@
     BaseNode.prototype.toString = function toString(idt) {
       var _a, _b, _c, _d, child;
       idt = idt || '';
-      return '\n' + idt + this.type + (function() {
+      return '\n' + idt + this.constructor.name + (function() {
         _a = []; _c = this.children;
         for (_b = 0, _d = _c.length; _b < _d; _b++) {
           child = _c[_b];
@@ -194,7 +194,6 @@
       return this;
     };
     __extends(Expressions, BaseNode);
-    Expressions.prototype.type = 'Expressions';
     // Tack an expression on to the end of this expression list.
     Expressions.prototype.push = function push(node) {
       this.expressions.push(node);
@@ -322,7 +321,6 @@
       return this;
     };
     __extends(LiteralNode, BaseNode);
-    LiteralNode.prototype.type = 'Literal';
     // Break and continue must be treated as pure statements -- they lose their
     // meaning when wrapped in a closure.
     LiteralNode.prototype.is_statement = function is_statement() {
@@ -349,7 +347,6 @@
       return this;
     };
     __extends(ReturnNode, BaseNode);
-    ReturnNode.prototype.type = 'Return';
     ReturnNode.prototype.top_sensitive = function top_sensitive() {
       return true;
     };
@@ -377,7 +374,6 @@
       return this;
     };
     __extends(ValueNode, BaseNode);
-    ValueNode.prototype.type = 'Value';
     ValueNode.prototype.SOAK = " == undefined ? undefined : ";
     // A **ValueNode** has a base and a list of property accesses.
     // Add a property access to the list.
@@ -471,7 +467,6 @@
       return this;
     };
     __extends(CommentNode, BaseNode);
-    CommentNode.prototype.type = 'Comment';
     CommentNode.prototype.make_return = function make_return() {
       return this;
     };
@@ -494,7 +489,6 @@
       return this;
     };
     __extends(CallNode, BaseNode);
-    CallNode.prototype.type = 'Call';
     // Tag this invocation as creating a new instance.
     CallNode.prototype.new_instance = function new_instance() {
       this.is_new = true;
@@ -564,7 +558,6 @@
       return this;
     };
     __extends(CurryNode, CallNode);
-    CurryNode.prototype.type = 'Curry';
     CurryNode.prototype.arguments = function arguments(o) {
       var _a, _b, _c, arg;
       _b = this.args;
@@ -594,7 +587,6 @@
       return this;
     };
     __extends(ExtendsNode, BaseNode);
-    ExtendsNode.prototype.type = 'Extends';
     // Hooks one constructor into another's prototype chain.
     ExtendsNode.prototype.compile_node = function compile_node(o) {
       var ref;
@@ -615,7 +607,6 @@
       return this;
     };
     __extends(AccessorNode, BaseNode);
-    AccessorNode.prototype.type = 'Accessor';
     AccessorNode.prototype.compile_node = function compile_node(o) {
       var proto_part;
       proto_part = this.prototype ? 'prototype.' : '';
@@ -632,7 +623,6 @@
       return this;
     };
     __extends(IndexNode, BaseNode);
-    IndexNode.prototype.type = 'Index';
     IndexNode.prototype.compile_node = function compile_node(o) {
       var idx;
       idx = this.index.compile(o);
@@ -651,7 +641,6 @@
       return this;
     };
     __extends(RangeNode, BaseNode);
-    RangeNode.prototype.type = 'Range';
     // Compiles the range's source variables -- where it starts and where it ends.
     RangeNode.prototype.compile_variables = function compile_variables(o) {
       var _a, _b, from, to;
@@ -707,7 +696,6 @@
       return this;
     };
     __extends(SliceNode, BaseNode);
-    SliceNode.prototype.type = 'Slice';
     SliceNode.prototype.compile_node = function compile_node(o) {
       var from, plus_part, to;
       from = this.range.from.compile(o);
@@ -725,7 +713,6 @@
       return this;
     };
     __extends(ObjectNode, BaseNode);
-    ObjectNode.prototype.type = 'Object';
     // 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.
@@ -775,7 +762,6 @@
       return this;
     };
     __extends(ArrayNode, BaseNode);
-    ArrayNode.prototype.type = 'Array';
     ArrayNode.prototype.compile_node = function compile_node(o) {
       var _a, _b, code, ending, i, obj, objects;
       o.indent = this.idt(1);
@@ -809,7 +795,6 @@
       return this;
     };
     __extends(ClassNode, BaseNode);
-    ClassNode.prototype.type = 'Class';
     // Initialize a **ClassNode** with its name, an optional superclass, and a
     // list of prototype property assignments.
     ClassNode.prototype.make_return = function make_return() {
@@ -869,7 +854,6 @@
       return this;
     };
     __extends(AssignNode, BaseNode);
-    AssignNode.prototype.type = 'Assign';
     // Matchers for detecting prototype assignments.
     AssignNode.prototype.PROTO_ASSIGN = /^(\S+)\.prototype/;
     AssignNode.prototype.LEADING_DOT = /^\.(prototype\.)?/;
@@ -993,7 +977,6 @@
       return this;
     };
     __extends(CodeNode, BaseNode);
-    CodeNode.prototype.type = 'Code';
     // 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 `arguments` objects. If the function is bound with the `=>`
@@ -1099,7 +1082,6 @@
       return this;
     };
     __extends(SplatNode, BaseNode);
-    SplatNode.prototype.type = 'Splat';
     SplatNode.prototype.compile_node = function compile_node(o) {
       var _a;
       if ((typeof (_a = this.index) !== "undefined" && _a !== null)) {
@@ -1170,7 +1152,6 @@
       return this;
     };
     __extends(WhileNode, BaseNode);
-    WhileNode.prototype.type = 'While';
     WhileNode.prototype.add_body = function add_body(body) {
       this.children.push((this.body = body));
       return this;
@@ -1219,14 +1200,13 @@
   // CoffeeScript operations into their JavaScript equivalents.
   exports.OpNode = (function() {
     OpNode = function OpNode(operator, first, second, flip) {
-      this.type += ' ' + operator;
+      this.constructor.name += ' ' + operator;
       this.children = compact([(this.first = first), (this.second = second)]);
       this.operator = this.CONVERSIONS[operator] || operator;
       this.flip = !!flip;
       return this;
     };
     __extends(OpNode, BaseNode);
-    OpNode.prototype.type = 'Op';
     // The map of conversions from CoffeeScript to JavaScript symbols.
     OpNode.prototype.CONVERSIONS = {
       '==': '===',
@@ -1327,7 +1307,6 @@
       return this;
     };
     __extends(TryNode, BaseNode);
-    TryNode.prototype.type = 'Try';
     TryNode.prototype.make_return = function make_return() {
       if (this.attempt) {
         this.attempt = this.attempt.make_return();
@@ -1360,7 +1339,6 @@
       return this;
     };
     __extends(ThrowNode, BaseNode);
-    ThrowNode.prototype.type = 'Throw';
     // A **ThrowNode** is already a return, of sorts...
     ThrowNode.prototype.make_return = function make_return() {
       return this;
@@ -1381,7 +1359,6 @@
       return this;
     };
     __extends(ExistenceNode, BaseNode);
-    ExistenceNode.prototype.type = 'Existence';
     ExistenceNode.prototype.compile_node = function compile_node(o) {
       return ExistenceNode.compile_test(o, this.expression);
     };
@@ -1416,7 +1393,6 @@
       return this;
     };
     __extends(ParentheticalNode, BaseNode);
-    ParentheticalNode.prototype.type = 'Paren';
     ParentheticalNode.prototype.is_statement = function is_statement() {
       return this.expression.is_statement();
     };
@@ -1468,7 +1444,6 @@
       return this;
     };
     __extends(ForNode, BaseNode);
-    ForNode.prototype.type = 'For';
     ForNode.prototype.top_sensitive = function top_sensitive() {
       return true;
     };
@@ -1572,7 +1547,6 @@
       return this;
     };
     __extends(IfNode, BaseNode);
-    IfNode.prototype.type = 'If';
     // Add a new *else* clause to this **IfNode**, or push it down to the bottom
     // of the chain recursively.
     IfNode.prototype.push = function push(else_body) {
@@ -1737,11 +1711,12 @@
   UTILITIES = {
     // Correctly set up a prototype chain for inheritance, including a reference
     // to the superclass for `super()` calls. See:
-    // [goog.inherits](http://closure-library.googlecode.com/svn/docs/closure_goog_base.js.source.html#line1206)
+    // [goog.inherits](http://closure-library.googlecode.com/svn/docs/closure_goog_base.js.source.html#line1206).
     __extends: "function(child, parent) {\n    var ctor = function(){ };\n    ctor.prototype = parent.prototype;\n    child.__superClass__ = parent.prototype;\n    child.prototype = new ctor();\n    child.prototype.constructor = child;\n  }",
     // Bind a function to a calling context, optionally including curried arguments.
-    // See [Underscore's implementation](http://jashkenas.github.com/coffee-script/documentation/docs/underscore.html#section-47)
+    // See [Underscore's implementation](http://jashkenas.github.com/coffee-script/documentation/docs/underscore.html#section-47).
     __bind: "function(func, obj, args) {\n    return function() {\n      return func.apply(obj || {}, args ? args.concat(__slice.call(arguments, 0)) : arguments);\n    };\n  }",
+    // Shortcuts to speed up the lookup time for native functions.
     __hasProp: 'Object.prototype.hasOwnProperty',
     __slice: 'Array.prototype.slice'
   };
diff --git a/src/nodes.coffee b/src/nodes.coffee
index f35bd587..0a9a1618 100644
--- a/src/nodes.coffee
+++ b/src/nodes.coffee
@@ -4,7 +4,7 @@
 # the syntax tree into a string of JavaScript code, call `compile()` on the root.
 
 # Set up for both **Node.js** and the browser, by
-# including the [Scope](scope.html) class.
+# including the [Scope](scope.html) class and the [helper](helpers.html) functions.
 if process?
   Scope:   require('./scope').Scope
   helpers: require('./helpers').helpers
@@ -13,7 +13,7 @@ else
   helpers:      this.helpers
   Scope:        this.Scope
 
-# Import the helpers we need.
+# Import the helpers we plan to use.
 compact: helpers.compact
 flatten: helpers.flatten
 merge:   helpers.merge
@@ -113,7 +113,7 @@ exports.BaseNode: class BaseNode
   # This is what `coffee --nodes` prints out.
   toString: (idt) ->
     idt: or ''
-    '\n' + idt + @type + (child.toString(idt + TAB) for child in @children).join('')
+    '\n' + idt + @constructor.name + (child.toString(idt + TAB) for child in @children).join('')
 
   # Default implementations of the common node identification methods. Nodes
   # will override these with custom logic, if needed.
@@ -129,7 +129,6 @@ exports.BaseNode: class BaseNode
 # indented block of code -- the implementation of a function, a clause in an
 # `if`, `switch`, or `try`, and so on...
 exports.Expressions: class Expressions extends BaseNode
-  type: 'Expressions'
 
   constructor: (nodes) ->
     @children: @expressions: compact flatten nodes or []
@@ -214,7 +213,6 @@ statement Expressions
 # JavaScript without translation, such as: strings, numbers,
 # `true`, `false`, `null`...
 exports.LiteralNode: class LiteralNode extends BaseNode
-  type: 'Literal'
 
   constructor: (value) ->
     @value: value
@@ -238,7 +236,6 @@ exports.LiteralNode: class LiteralNode extends BaseNode
 # A `return` is a *pure_statement* -- wrapping it in a closure wouldn't
 # make sense.
 exports.ReturnNode: class ReturnNode extends BaseNode
-  type: 'Return'
 
   constructor: (expression) ->
     @children: [@expression: expression]
@@ -260,7 +257,6 @@ statement ReturnNode, true
 # A value, variable or literal or parenthesized, indexed or dotted into,
 # or vanilla.
 exports.ValueNode: class ValueNode extends BaseNode
-  type: 'Value'
 
   SOAK: " == undefined ? undefined : "
 
@@ -335,7 +331,6 @@ exports.ValueNode: class ValueNode extends BaseNode
 # CoffeeScript passes through comments as JavaScript comments at the
 # same position.
 exports.CommentNode: class CommentNode extends BaseNode
-  type: 'Comment'
 
   constructor: (lines) ->
     @lines: lines
@@ -354,7 +349,6 @@ statement CommentNode
 # Node for a function invocation. Takes care of converting `super()` calls into
 # calls against the prototype's function of the same name.
 exports.CallNode: class CallNode extends BaseNode
-  type: 'Call'
 
   constructor: (variable, args) ->
     @is_new:   false
@@ -406,7 +400,6 @@ exports.CallNode: class CallNode extends BaseNode
 # returning the bound function. After ECMAScript 5, Prototype.js, and
 # Underscore's `bind` functions.
 exports.CurryNode: class CurryNode extends CallNode
-  type: 'Curry'
 
   constructor: (meth, args) ->
     @children:  flatten [@meth: meth, @context: args[0], @args: (args.slice(1) or [])]
@@ -429,7 +422,6 @@ exports.CurryNode: class CurryNode extends CallNode
 # After `goog.inherits` from the
 # [Closure Library](http://closure-library.googlecode.com/svn/docs/closure_goog_base.js.html).
 exports.ExtendsNode: class ExtendsNode extends BaseNode
-  type: 'Extends'
 
   constructor: (child, parent) ->
     @children:  [@child: child, @parent: parent]
@@ -444,11 +436,10 @@ exports.ExtendsNode: class ExtendsNode extends BaseNode
 # A `.` accessor into a property of a value, or the `::` shorthand for
 # an accessor into the object's prototype.
 exports.AccessorNode: class AccessorNode extends BaseNode
-  type: 'Accessor'
 
   constructor: (name, tag) ->
     @children:  [@name: name]
-    @prototype: tag is 'prototype'
+    @prototype:tag is 'prototype'
     @soak_node: tag is 'soak'
     this
 
@@ -460,7 +451,6 @@ exports.AccessorNode: class AccessorNode extends BaseNode
 
 # A `[ ... ]` indexed accessor into an array or object.
 exports.IndexNode: class IndexNode extends BaseNode
-  type: 'Index'
 
   constructor: (index, tag) ->
     @children:  [@index: index]
@@ -476,7 +466,6 @@ exports.IndexNode: class IndexNode extends BaseNode
 # to specify a range for comprehensions, or as a value, to be expanded into the
 # corresponding array of integers at runtime.
 exports.RangeNode: class RangeNode extends BaseNode
-  type: 'Range'
 
   constructor: (from, to, exclusive) ->
     @children:  [@from: from, @to: to]
@@ -518,7 +507,6 @@ exports.RangeNode: class RangeNode extends BaseNode
 # specifies the index of the end of the slice, just as the first parameter
 # is the index of the beginning.
 exports.SliceNode: class SliceNode extends BaseNode
-  type: 'Slice'
 
   constructor: (range) ->
     @children: [@range: range]
@@ -534,7 +522,6 @@ exports.SliceNode: class SliceNode extends BaseNode
 
 # An object literal, nothing fancy.
 exports.ObjectNode: class ObjectNode extends BaseNode
-  type: 'Object'
 
   constructor: (props) ->
     @children: @objects: @properties: props or []
@@ -562,7 +549,6 @@ exports.ObjectNode: class ObjectNode extends BaseNode
 
 # An array literal.
 exports.ArrayNode: class ArrayNode extends BaseNode
-  type: 'Array'
 
   constructor: (objects) ->
     @children: @objects: objects or []
@@ -589,7 +575,6 @@ exports.ArrayNode: class ArrayNode extends BaseNode
 
 # The CoffeeScript class definition.
 exports.ClassNode: class ClassNode extends BaseNode
-  type: 'Class'
 
   # Initialize a **ClassNode** with its name, an optional superclass, and a
   # list of prototype property assignments.
@@ -645,7 +630,6 @@ statement ClassNode
 # The **AssignNode** is used to assign a local variable to value, or to set the
 # property of an object -- including within object literals.
 exports.AssignNode: class AssignNode extends BaseNode
-  type: 'Assign'
 
   # Matchers for detecting prototype assignments.
   PROTO_ASSIGN: /^(\S+)\.prototype/
@@ -735,7 +719,6 @@ exports.AssignNode: class AssignNode extends BaseNode
 # When for the purposes of walking the contents of a function body, the CodeNode
 # has no *children* -- they're within the inner scope.
 exports.CodeNode: class CodeNode extends BaseNode
-  type: 'Code'
 
   constructor: (params, body, tag) ->
     @params:  params or []
@@ -804,7 +787,6 @@ exports.CodeNode: class CodeNode extends BaseNode
 # A splat, either as a parameter to a function, an argument to a call,
 # or as part of a destructuring assignment.
 exports.SplatNode: class SplatNode extends BaseNode
-  type: 'Splat'
 
   constructor: (name) ->
     name: literal(name) unless name.compile
@@ -857,7 +839,6 @@ exports.SplatNode: class SplatNode extends BaseNode
 # it, all other loops can be manufactured. Useful in cases where you need more
 # flexibility or more speed than a comprehension can provide.
 exports.WhileNode: class WhileNode extends BaseNode
-  type: 'While'
 
   constructor: (condition, opts) ->
     @children:[@condition: condition]
@@ -903,7 +884,6 @@ statement WhileNode
 # Simple Arithmetic and logical operations. Performs some conversion from
 # CoffeeScript operations into their JavaScript equivalents.
 exports.OpNode: class OpNode extends BaseNode
-  type: 'Op'
 
   # The map of conversions from CoffeeScript to JavaScript symbols.
   CONVERSIONS: {
@@ -922,7 +902,7 @@ exports.OpNode: class OpNode extends BaseNode
   PREFIX_OPERATORS: ['typeof', 'delete']
 
   constructor: (operator, first, second, flip) ->
-    @type: + ' ' + operator
+    @constructor.name: + ' ' + operator
     @children: compact [@first: first, @second: second]
     @operator: @CONVERSIONS[operator] or operator
     @flip: !!flip
@@ -979,7 +959,6 @@ exports.OpNode: class OpNode extends BaseNode
 
 # A classic *try/catch/finally* block.
 exports.TryNode: class TryNode extends BaseNode
-  type: 'Try'
 
   constructor: (attempt, error, recovery, ensure) ->
     @children: compact [@attempt: attempt, @recovery: recovery, @ensure: ensure]
@@ -1008,7 +987,6 @@ statement TryNode
 
 # Simple node to throw an exception.
 exports.ThrowNode: class ThrowNode extends BaseNode
-  type: 'Throw'
 
   constructor: (expression) ->
     @children: [@expression: expression]
@@ -1028,7 +1006,6 @@ statement ThrowNode
 # similar to `.nil?` in Ruby, and avoids having to consult a JavaScript truth
 # table.
 exports.ExistenceNode: class ExistenceNode extends BaseNode
-  type: 'Existence'
 
   constructor: (expression) ->
     @children: [@expression: expression]
@@ -1054,7 +1031,6 @@ exports.ExistenceNode: class ExistenceNode extends BaseNode
 #
 # Parentheses are a good way to force any statement to become an expression.
 exports.ParentheticalNode: class ParentheticalNode extends BaseNode
-  type: 'Paren'
 
   constructor: (expression) ->
     @children: [@expression: expression]
@@ -1082,7 +1058,6 @@ exports.ParentheticalNode: class ParentheticalNode extends BaseNode
 # the current index of the loop as a second parameter. Unlike Ruby blocks,
 # you can map and filter in a single pass.
 exports.ForNode: class ForNode extends BaseNode
-  type: 'For'
 
   constructor: (body, source, name, index) ->
     @body:    body
@@ -1163,7 +1138,6 @@ statement ForNode
 # Single-expression **IfNodes** are compiled into ternary operators if possible,
 # because ternaries are already proper expressions, and don't need conversion.
 exports.IfNode: class IfNode extends BaseNode
-  type: 'If'
 
   constructor: (condition, body, else_body, tags) ->
     @condition: condition
@@ -1304,7 +1278,7 @@ UTILITIES: {
 
   # Correctly set up a prototype chain for inheritance, including a reference
   # to the superclass for `super()` calls. See:
-  # [goog.inherits](http://closure-library.googlecode.com/svn/docs/closure_goog_base.js.source.html#line1206)
+  # [goog.inherits](http://closure-library.googlecode.com/svn/docs/closure_goog_base.js.source.html#line1206).
   __extends:  """
               function(child, parent) {
                   var ctor = function(){ };
@@ -1316,7 +1290,7 @@ UTILITIES: {
               """
 
   # Bind a function to a calling context, optionally including curried arguments.
-  # See [Underscore's implementation](http://jashkenas.github.com/coffee-script/documentation/docs/underscore.html#section-47)
+  # See [Underscore's implementation](http://jashkenas.github.com/coffee-script/documentation/docs/underscore.html#section-47).
   __bind:   """
             function(func, obj, args) {
                 return function() {
@@ -1325,9 +1299,9 @@ UTILITIES: {
               }
             """
 
-  __hasProp:'Object.prototype.hasOwnProperty'
-
-  __slice:  'Array.prototype.slice'
+  # Shortcuts to speed up the lookup time for native functions.
+  __hasProp: 'Object.prototype.hasOwnProperty'
+  __slice: 'Array.prototype.slice'
 
 }