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waypoint -- starting to implement nodes.coffee with interpolations, and fixing/shortening/combining the lexer implementation to allow identifier interpolations to be interleaved with expression interps

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This commit is contained in:
Jeremy Ashkenas
2010-03-05 22:52:28 -05:00
parent 08341286a3
commit b4ea43cbd0
4 changed files with 87 additions and 114 deletions
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25
src/nodes.coffee
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@@ -161,16 +161,16 @@ exports.Expressions: class Expressions extends BaseNode
o.scope: new Scope(null, this, null)
code: if o.globals then @compile_node(o) else @compile_with_declarations(o)
code: code.replace(TRAILING_WHITESPACE, '')
if o.no_wrap then code else "(function(){\n"+code+"\n})();\n"
if o.no_wrap then code else "(function(){\n$code\n})();\n"
# Compile the expressions body, with declarations of all inner variables
# pushed up to the top.
compile_with_declarations: (o) ->
code: @compile_node(o)
args: @contains (node) -> node instanceof ValueNode and node.is_arguments()
code: @idt() + "arguments = Array.prototype.slice.call(arguments, 0);\n" + code if args
code: @idt() + 'var ' + o.scope.compiled_assignments() + ";\n" + code if o.scope.has_assignments(this)
code: @idt() + 'var ' + o.scope.compiled_declarations() + ";\n" + code if o.scope.has_declarations(this)
code: "${@idt()}arguments = Array.prototype.slice.call(arguments, 0);\n$code" if args
code: "${@idt()}var ${o.scope.compiled_assignments()};\n$code" if o.scope.has_assignments(this)
code: "${@idt()}var ${o.scope.compiled_declarations()};\n$code" if o.scope.has_declarations(this)
code
# Compiles a single expression within the expressions body.
@@ -184,7 +184,7 @@ exports.Expressions: class Expressions extends BaseNode
# 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 ${node.compile(o)};"
# Wrap up a node as an Expressions, unless it already is one.
Expressions.wrap: (nodes) ->
@@ -212,10 +212,10 @@ exports.LiteralNode: class LiteralNode extends BaseNode
compile_node: (o) ->
idt: if @is_statement() then @idt() else ''
end: if @is_statement() then ';' else ''
idt + @value + end
"$idt$@value$end"
toString: (idt) ->
' "' + @value + '"'
" \"$@value\""
# Return an expression, or wrap it in a closure and return it.
@@ -227,7 +227,7 @@ exports.ReturnNode: class ReturnNode extends BaseNode
compile_node: (o) ->
return @expression.compile(merge(o, {returns: true})) if @expression.is_statement()
@idt() + 'return ' + @expression.compile(o) + ';'
"${@idt()}return ${@expression.compile(o)};"
statement ReturnNode, true
@@ -277,7 +277,7 @@ exports.ValueNode: class ValueNode extends BaseNode
op: del(o, 'operation')
props: if only then @properties[0...@properties.length - 1] else @properties
baseline: @base.compile o
baseline: '(' + baseline + ')' if @base instanceof ObjectNode and @has_properties()
baseline: "($baseline)" if @base instanceof ObjectNode and @has_properties()
complete: @last: baseline
for prop in props
@@ -286,7 +286,7 @@ exports.ValueNode: class ValueNode extends BaseNode
soaked: true
if @base instanceof CallNode and prop is props[0]
temp: o.scope.free_variable()
complete: '(' + temp + ' = ' + complete + ')' + @SOAK + (baseline: temp + prop.compile(o))
complete: "($temp = $complete)$@SOAK" + (baseline: temp + prop.compile(o))
else
complete: complete + @SOAK + (baseline += prop.compile(o))
else
@@ -295,7 +295,7 @@ exports.ValueNode: class ValueNode extends BaseNode
complete += part
@last: part
if op and soaked then '(' + complete + ')' else complete
if op and soaked then "($complete)" else complete
# Pass through CoffeeScript comments into JavaScript comments at the
@@ -308,7 +308,7 @@ exports.CommentNode: class CommentNode extends BaseNode
this
compile_node: (o) ->
@idt() + '//' + @lines.join('\n' + @idt() + '//')
"${@idt()}//" + @lines.join("\n${@idt()}//")
statement CommentNode
@@ -336,6 +336,7 @@ exports.CallNode: class CallNode extends BaseNode
return @compile_splat(o) if @args[@args.length - 1] instanceof SplatNode
args: (arg.compile(o) for arg in @args).join(', ')
return @compile_super(args, o) if @variable is 'super'
# "$@prefix${@variable.compile(o)}($args)"
@prefix + @variable.compile(o) + '(' + args + ')'
# Compile a call against the superclass's implementation of the current function.