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more streamlined code generation for instance-bound methods ... keep the prototype method around, and just bind it in the constructor.

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This commit is contained in:
Jeremy Ashkenas
2010-06-15 02:21:01 -04:00
parent 8d853a6d58
commit 06ca2ef726
2 changed files with 42 additions and 24 deletions
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33
src/nodes.coffee
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@@ -655,9 +655,12 @@ exports.ClassNode: class ClassNode extends BaseNode
# equivalent syntax tree and compile that, in pieces. You can see the
# constructor, property assignments, and inheritance getting built out below.
compileNode: (o) ->
extension: @parent and new ExtendsNode(@variable, @parent)
props: new Expressions()
o.top: true
extension: @parent and new ExtendsNode(@variable, @parent)
props: new Expressions()
o.top: true
me: null
className: @variable.compile o
constScope: null
if @parent
applied: new ValueNode(@parent, [new AccessorNode(literal('apply'))])
@@ -670,23 +673,27 @@ exports.ClassNode: class ClassNode extends BaseNode
for prop in @properties
[pvar, func]: [prop.variable, prop.value]
if pvar and pvar.base.value is 'constructor' and func instanceof CodeNode
func.name: @variable.compile(o)
func.name: className
func.body.push new ReturnNode literal 'this'
@variable: new ValueNode @variable
@variable.namespaced: include func.name, '.'
constructor: func
continue
if func instanceof CodeNode and func.bound
func.bound: false
constScope: or new Scope(o.scope, constructor.body, constructor)
me: or constScope.freeVariable()
pname: pvar.compile(o)
constructor.body.push new ReturnNode literal 'this' if constructor.body.empty()
constructor.body.unshift new AssignNode(new ValueNode(literal('this'), [new AccessorNode(pvar)]), func)
else
if pvar
access: if prop.context is 'this' then pvar.base.properties[0] else new AccessorNode(pvar, 'prototype')
val: new ValueNode(@variable, [access])
prop: new AssignNode(val, func)
props.push prop
constructor.body.unshift literal "this.${pname} = function(){ return ${className}.prototype.${pname}.apply($me, arguments); }"
if pvar
access: if prop.context is 'this' then pvar.base.properties[0] else new AccessorNode(pvar, 'prototype')
val: new ValueNode(@variable, [access])
prop: new AssignNode(val, func)
props.push prop
construct: @idt() + (new AssignNode(@variable, constructor)).compile(o) + ';\n'
constructor.body.unshift literal "$me = this" if me
construct: @idt() + (new AssignNode(@variable, constructor)).compile(merge o, {sharedScope: constScope}) + ';\n'
props: if props.empty() then '' else props.compile(o) + '\n'
extension: if extension then @idt() + extension.compile(o) + ';\n' else ''
returns: if @returns then new ReturnNode(@variable).compile(o) else ''
@@ -815,7 +822,7 @@ exports.CodeNode: class CodeNode extends BaseNode
# arrow, generates a wrapper that saves the current value of `this` through
# a closure.
compileNode: (o) ->
sharedScope: del o, 'sharedScope'
sharedScope: del o, 'sharedScope'
top: del o, 'top'
o.scope: sharedScope or new Scope(o.scope, @body, this)
o.top: true