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got about as far as I think I can with operator nodes for now, without zach's optimizations

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Jeremy Ashkenas
2010-02-10 00:05:56 -05:00
parent 9339058fc3
commit 76dac9c09c
5 changed files with 223 additions and 122 deletions
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35
src/nodes.coffee
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@@ -44,6 +44,9 @@ exports.Expressions.wrap : (values) -> @values: values
TAB: ' '
TRAILING_WHITESPACE: /\s+$/g
# Keep the identifier regex in sync with the Lexer.
IDENTIFIER: /^[a-zA-Z$_](\w|\$)*$/
# Flatten nested arrays recursively.
flatten: (list) ->
memo: []
@@ -587,8 +590,6 @@ ClosureNode: exports.ClosureNode: {
# Setting the value of a local variable, or the value of an object property.
AssignNode: exports.AssignNode: inherit Node, {
# Keep the identifier regex in sync with the Lexer.
IDENTIFIER: /^([a-zA-Z$_](\w|\$)*)/
PROTO_ASSIGN: /^(\S+)\.prototype/
LEADING_DOT: /^\.(prototype\.)?/
@@ -616,7 +617,7 @@ AssignNode: exports.AssignNode: inherit Node, {
match: name.match(@PROTO_ASSIGN)
proto: match and match[1]
if @value instanceof CodeNode
@value.name: last if last.match(@IDENTIFIER)
@value.name: last if last.match(IDENTIFIER)
@value.proto: proto if proto
return name + ': ' + @value.compile(o) if @context is 'object'
o.scope.find(name) unless @is_value() and @variable.has_properties()
@@ -773,8 +774,34 @@ OpNode: exports.OpNode: inherit Node, {
@CHAINABLE.indexOf(@operator) >= 0
compile_node: (o) ->
return @compile_chain(o) if @is_chainable() and (@first.unwrap() instanceof OpNode) and @first.unwrap().is_chainable()
return @compile_chain(o) if @is_chainable() and @first.unwrap() instanceof OpNode and @first.unwrap().is_chainable()
return @compile_assignment(o) if @ASSIGNMENT.indexOf(@operator) >= 0
return @compile_unary(o) if @is_unary()
return @compile_existence(o) if @operator is '?'
@first.compile(o) + ' ' + @operator + ' ' + @second.compile(o)
# Mimic Python's chained comparisons. See:
# http://docs.python.org/reference/expressions.html#notin
compile_chain: (o) ->
shared: @first.unwrap().second
[@first.second, shared]: shared.compile_reference(o) if shared instanceof CallNode
'(' + @first.compile(o) + ') && (' + shared.compile(o) + ' ' + @operator + ' ' + @second.compile(o) + ')'
compile_assignment: (o) ->
[first, second]: [@first.compile(o), @second.compile(o)]
o.scope.find(first) if @first.unwrap.match(IDENTIFIER)
return first + ' = ' + ExistenceNode.compile_test(o, @first) + ' ? ' + first + ' : ' + second if @operator is '?='
first + ' = ' + first + ' ' + @operator.substr(0, 2) + ' ' + second
compile_existence: (o) ->
[first, second]: [@first.compile(o), @second.compile(o)]
ExistenceNode.compile_test(o, @first) + ' ? ' + first + ' : ' + second
compile_unary: (o) ->
space: if @PREFIX_OPERATORS.indexOf(@operator) >= 0 then ' ' else ''
parts: [@operator, space, @first.compile(o)]
parts: parts.reverse() if @flip
parts.join('')
}