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Self-compiler: can now compile functions.

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This commit is contained in:
Jeremy Ashkenas
2010-02-09 21:31:07 -05:00
parent c466537a26
commit ae4f6309e8
5 changed files with 202 additions and 88 deletions
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61
src/nodes.coffee
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@@ -177,7 +177,7 @@ Expressions: exports.Expressions: inherit Node, {
# Is the node last in this block of expressions?
is_last: (node) ->
l: @expressions.length
@last_index ||= if @expressions[l - 1] instanceof CommentNode then -2 else -1
@last_index ||= if @expressions[l - 1] instanceof CommentNode then 2 else 1
node is @expressions[l - @last_index]
compile: (o) ->
@@ -218,7 +218,7 @@ Expressions: exports.Expressions: inherit Node, {
# If it's a statement, the node knows how to return itself.
return node.compile(merge(o, {returns: true})) if node.is_statement()
# Otherwise, we can just return the value of the expression.
return @idt() + 'return ' + node.compile(o)
return @idt() + 'return ' + node.compile(o) + ';'
}
@@ -561,9 +561,28 @@ ArrayNode: exports.ArrayNode: inherit Node, {
}
# A faux-node that is never created by the grammar, but is used during
# code generation to generate a quick "array.push(value)" tree of nodes.
PushNode: exports.PushNode: {
wrap: (array, expressions) ->
expr: expressions.unwrap()
return expressions if expr.is_statement_only() or expr.contains (n) -> n.is_statement_only()
Expressions.wrap(new CallNode(
new ValueNode(new LiteralNode(array), [new AccessorNode(new LiteralNode('push'))]), [expr]
))
}
# A faux-node used to wrap an expressions body in a closure.
ClosureNode: exports.ClosureNode: {
wrap: (expressions, statement) ->
func: new ParentheticalNode(new CodeNode([], Expressions.wrap(expressions)))
call: new CallNode(new ValueNode(func, new AccessorNode(new LiteralNode('call'))), [new LiteralNode('this')])
if statement then Expressions.wrap(call) else call
}
# Setting the value of a local variable, or the value of an object property.
AssignNode: exports.AssignNode: inherit Node, {
@@ -635,8 +654,42 @@ AssignNode: exports.AssignNode: inherit Node, {
}
# A function definition. The only node that creates a new Scope.
# A CodeNode does not have any children -- they're within the new scope.
CodeNode: exports.CodeNode: inherit Node, {
constructor: (params, body, tag) ->
@params: params
@body: body
@bound: tag is 'boundfunc'
this
compile_node: (o) ->
shared_scope: del o, 'shared_scope'
top: del o, 'top'
o.scope: shared_scope or new Scope(o.scope, @body, this)
o.returns: true
o.top: true
o.indent: @idt(if @bound then 2 else 1)
del o, 'no_wrap'
del o, 'globals'
if @params[@params.length - 1] instanceof SplatNode
splat: @params.pop()
splat.index: @params.length
@body.unshift(splat)
(o.scope.parameter(param)) for param in @params
code: if @body.expressions.length then '\n' + @body.compile_with_declarations(o) + '\n' else ''
name_part: if @name then ' ' + @name else ''
func: 'function' + (if @bound then '' else name_part) + '(' + @params.join(', ') + ') {' + code + @idt(if @bound then 1 else 0) + '}'
func: '(' + func + ')' if top and not @bound
return func unless @bound
inner: '(function' + name_part + '() {\n' + @idt(2) + 'return __func.apply(__this, arguments);\n' + @idt(1) + '});'
'(function(__this) {\n' + @idt(1) + 'var __func = ' + func + ';\n' + @idt(1) + 'return ' + inner + '\n' + @idt() + '})(this)'
top_sensitive: ->
true
}