Using an experimental version of new optional-brace object literals.

src/cake.coffee

@@ -48,7 +48,7 @@ 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').toString(), {source: 'Cakefile'}
+    CoffeeScript.run fs.readFileSync('Cakefile').toString(), source: 'Cakefile'
     oparse = new optparse.OptionParser switches
     return printTasks() unless args.length
     options = oparse.parse(args)

src/grammar.coffee

@@ -287,6 +287,7 @@ grammar = {
     o "",                                       -> []
     o "ClassAssign",                            -> [$1]
     o "ClassBody TERMINATOR ClassAssign",       -> $1.concat $3
+    o "{ ClassBody }",                          -> $2
   ]
 
   # The three flavors of function call: normal, object instantiation with `new`,

src/lexer.coffee

@@ -131,7 +131,7 @@ exports.Lexer = class Lexer
     return false unless match = @chunk.match(HEREDOC)
     quote = match[1].substr 0, 1
     doc = @sanitizeHeredoc match[2] or match[4], {quote}
-    @interpolateString "$quote$doc$quote", {heredoc: yes}
+    @interpolateString "$quote$doc$quote", heredoc: yes
     @line += count match[1], "\n"
     @i += match[1].length
     true
@@ -142,7 +142,7 @@ exports.Lexer = class Lexer
     @line += count match[1], "\n"
     @i += match[1].length
     if match[2]
-      comment = @sanitizeHeredoc match[2], {herecomment: true}
+      comment = @sanitizeHeredoc match[2], herecomment: true
       @token 'HERECOMMENT', comment.split MULTILINER
       @token 'TERMINATOR', '\n'
     true
@@ -169,7 +169,7 @@ exports.Lexer = class Lexer
       str = regex.substring(1).split('/')[0]
       str = str.replace REGEX_ESCAPE, (escaped) -> '\\' + escaped
       @tokens = @tokens.concat [['(', '('], ['NEW', 'new'], ['IDENTIFIER', 'RegExp'], ['CALL_START', '(']]
-      @interpolateString "\"$str\"", {escapeQuotes: yes}
+      @interpolateString "\"$str\"", escapeQuotes: yes
       @tokens.splice @tokens.length, 0, [',', ','], ['STRING', "\"$flags\""] if flags
       @tokens.splice @tokens.length, 0, [')', ')'], [')', ')']
     else
@@ -405,7 +405,7 @@ exports.Lexer = class Lexer
           inner = expr.substring(2, expr.length - 1)
           if inner.length
             inner = inner.replace new RegExp('\\\\' + quote, 'g'), quote if options.heredoc
-            nested = lexer.tokenize "($inner)", {line: @line}
+            nested = lexer.tokenize "($inner)", line: @line
             (tok[0] = ')') for tok, idx in nested when tok[0] is 'CALL_END'
             nested.pop()
             tokens.push ['TOKENS', nested]

src/nodes.coffee

@@ -224,7 +224,7 @@ exports.Expressions = class Expressions extends BaseNode
   # statement, ask the statement to do so.
   compileExpression: (node, o) ->
     @tab = o.indent
-    compiledNode = node.compile merge o, {top: true}
+    compiledNode = node.compile merge o, top: true
     if node.isStatement() then compiledNode else "${@idt()}$compiledNode;"
 
 # Wrap up the given nodes as an **Expressions**, unless it already happens
@@ -542,9 +542,9 @@ exports.RangeNode = class RangeNode extends BaseNode
   # Compiles the range's source variables -- where it starts and where it ends.
   # But only if they need to be cached to avoid double evaluation.
   compileVariables: (o) ->
-    o = merge(o, {top: true})
-    [@from, @fromVar] =  @from.compileReference o, {precompile: yes}
-    [@to, @toVar] =      @to.compileReference o, {precompile: yes}
+    o = merge(o, top: true)
+    [@from, @fromVar] =  @from.compileReference o, precompile: yes
+    [@to, @toVar] =      @to.compileReference o, precompile: yes
     [@fromNum, @toNum] = [@fromVar.match(SIMPLENUM), @toVar.match(SIMPLENUM)]
     parts = []
     parts.push @from if @from isnt @fromVar
@@ -579,7 +579,7 @@ exports.RangeNode = class RangeNode extends BaseNode
   # When used as a value, expand the range into the equivalent array.
   compileArray: (o) ->
     idt    = @idt 1
-    vars   = @compileVariables(merge(o, {indent: idt}))
+    vars   = @compileVariables merge o, indent: idt
     result = o.scope.freeVariable()
     i      = o.scope.freeVariable()
     pre    = "\n${idt}${result} = []; ${vars}"
@@ -832,7 +832,7 @@ exports.AssignNode = class AssignNode extends BaseNode
   # Compile the assignment from an array splice literal, using JavaScript's
   # `Array#splice` method.
   compileSplice: (o) ->
-    name  = @variable.compile merge o, {onlyFirst: true}
+    name  = @variable.compile merge o, onlyFirst: true
     l     = @variable.properties.length
     range = @variable.properties[l - 1].range
     plus  = if range.exclusive then '' else ' + 1'
@@ -1006,7 +1006,7 @@ exports.WhileNode = class WhileNode extends BaseNode
     pre     = "$set${@tab}while ($cond)"
     @body   = Expressions.wrap([new IfNode(@guard, @body)]) if @guard
     if @returns
-      post = '\n' + new ReturnNode(literal(rvar)).compile(merge(o, {indent: @idt()}))
+      post = '\n' + new ReturnNode(literal(rvar)).compile(merge(o, indent: @idt()))
     else
       post = ''
     "$pre {\n${ @body.compile(o) }\n$@tab}$post"
@@ -1107,7 +1107,7 @@ exports.InNode = class InNode extends BaseNode
     @array instanceof ValueNode and @array.isArray()
 
   compileNode: (o) ->
-    [@obj1, @obj2] = @object.compileReference o, {precompile: yes}
+    [@obj1, @obj2] = @object.compileReference o, precompile: yes
     if @isArray() then @compileOrTest(o) else @compileLoopTest(o)
 
   compileOrTest: (o) ->
@@ -1116,7 +1116,7 @@ exports.InNode = class InNode extends BaseNode
     "(${tests.join(' || ')})"
 
   compileLoopTest: (o) ->
-    [@arr1, @arr2] = @array.compileReference o, {precompile: yes}
+    [@arr1, @arr2] = @array.compileReference o, precompile: yes
     [i, l] = [o.scope.freeVariable(), o.scope.freeVariable()]
     prefix = if @obj1 isnt @obj2 then @obj1 + '; ' else ''
     "!!(function(){ ${prefix}for (var $i=0, $l=${@arr1}.length; $i<$l; $i++) if (${@arr2}[$i] === $@obj2) return true; }).call(this)"
@@ -1289,7 +1289,7 @@ exports.ForNode = class ForNode extends BaseNode
     body          = Expressions.wrap([@body])
     if range
       sourcePart  = source.compileVariables(o)
-      forPart     = source.compile merge o, {index: ivar, step: @step}
+      forPart     = source.compile merge o, index: ivar, step: @step
     else
       svar        = scope.freeVariable()
       sourcePart  = "$svar = ${ @source.compile(o) };"

src/optparse.coffee

@@ -23,7 +23,7 @@ exports.OptionParser = class OptionParser
   # many option parsers that allow you to attach callback actions for every
   # flag. Instead, you're responsible for interpreting the options object.
   parse: (args) ->
-    options = {arguments: []}
+    options = arguments: []
     args    = normalizeArguments args
     for arg, i in args
       isOption = !!(arg.match(LONG_FLAG) or arg.match(SHORT_FLAG))

src/repl.coffee

@@ -13,16 +13,14 @@ readline     = require 'readline'
 stdio = process.openStdin()
 
 # Quick alias for quitting the REPL.
-helpers.extend global, {
-  quit: -> process.exit(0)
-}
+helpers.extend global, quit: -> 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 = (buffer) ->
   try
-    val = CoffeeScript.run buffer.toString(), {noWrap: true, globals: true, source: 'repl'}
+    val = CoffeeScript.run buffer.toString(), noWrap: true, globals: true, source: 'repl'
     puts inspect val if val isnt undefined
   catch err
     puts err.stack or err.toString()

src/rewriter.coffee

@@ -31,6 +31,7 @@ exports.Rewriter = class Rewriter
     @removeMidExpressionNewlines()
     @closeOpenCallsAndIndexes()
     @addImplicitIndentation()
+    @addImplicitBraces()
     @addImplicitParentheses()
     @ensureBalance BALANCED_PAIRS
     @rewriteClosingParens()
@@ -110,6 +111,41 @@ exports.Rewriter = class Rewriter
             brackets[brackets.length - 1] -= 1
       return 1
 
+  # Object literals may be written with implicit braces, for simple cases.
+  # Insert the missing braces here, so that the parser doesn't have to.
+  addImplicitBraces: ->
+    stack = [0]
+    closeBrackets = (i) =>
+      len = stack.length - 1
+      for tmp in [0...stack[len]]
+        @tokens.splice(i, 0, ['}', '}', @tokens[i][2]])
+      size = stack[len] + 1
+      stack[len] = 0
+      size
+    @scanTokens (prev, token, post, i) =>
+      tag    = token[0]
+      len    = stack.length - 1
+      before = @tokens[i - 2]
+      after  = @tokens[i + 2]
+      open   = stack[len] > 0
+      if include EXPRESSION_START, tag
+        stack.push(if tag is '{' then 1 else 0)
+        return 2 if tag is '{' and post and post[0] is 'INDENT'
+      else if include EXPRESSION_END, tag
+        return 1 if tag is 'OUTDENT' and post and post[0] is '}'
+        stack[len - 1] += stack.pop()
+        stack[len - 1] -= 1 if tag is '}'
+      else if tag is ':' and not open
+        idx = if before and before[0] is '@' then i - 2 else i - 1
+        @tokens.splice idx, 0, ['{', '{', token[2]]
+        stack[stack.length - 1] += 1
+        return 2
+      else if tag is 'TERMINATOR' and
+          not ((after and after[0] is ':') or (post and post[0] is '@' and @tokens[i + 3] and @tokens[i + 3][0] is ':'))
+        size = closeBrackets(i)
+        return size
+      return 1
+
   # 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.

src/scope.coffee

@@ -61,7 +61,7 @@ exports.Scope = class Scope
   # Ensure that an assignment is made at the top of this scope
   # (or at the top-level scope, if requested).
   assign: (name, value) ->
-    @variables[name] = {value: value, assigned: true}
+    @variables[name] = value: value, assigned: true
 
   # Does this scope reference any variables that need to be declared in the
   # given function body?