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jashkenas--coffeescript
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rewriting the compiler using 'unless' blocks where appropriate.

This commit is contained in:
Jeremy Ashkenas 2010-04-27 19:38:24 -04:00
parent b746c9018e
commit 502abade7c
4 changed files with 9 additions and 9 deletions
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2
lib/lexer.js
View File

@ -141,7 +141,7 @@
tag = 'LEADING_WHEN';
}
this.i += id.length;
if (!accessed) {
if (!(accessed)) {
if (include(COFFEE_ALIASES, id)) {
tag = (id = CONVERSIONS[id]);
}

6
lib/nodes.js
View File

@ -845,7 +845,7 @@
props.push(prop);
}
}
if (!constructor) {
if (!(constructor)) {
if (this.parent) {
applied = new ValueNode(this.parent, [new AccessorNode(literal('apply'))]);
constructor = new AssignNode(this.variable, new CodeNode([], new Expressions([new CallNode(applied, [literal('this'), literal('arguments')])])));
@ -1202,7 +1202,7 @@
o.top = true;
cond = this.condition.compile(o);
set = '';
if (!top) {
if (!(top)) {
rvar = o.scope.free_variable();
set = ("" + this.tab + rvar + " = [];\n");
if (this.body) {
@ -1535,7 +1535,7 @@
} else if (name) {
var_part = ("" + body_dent + name + " = " + svar + "[" + ivar + "];\n");
}
if (!this.object) {
if (!(this.object)) {
lvar = scope.free_variable();
step_part = this.step ? ("" + ivar + " += " + (this.step.compile(o))) : ("" + ivar + "++");
for_part = ("" + ivar + " = 0, " + lvar + " = " + (svar) + ".length; " + ivar + " < " + lvar + "; " + step_part);

2
src/lexer.coffee
View File

@ -96,7 +96,7 @@ exports.Lexer: class Lexer
@identifier_error id if include RESERVED, id
tag: 'LEADING_WHEN' if tag is 'WHEN' and include LINE_BREAK, @tag()
@i: + id.length
if not accessed
unless accessed
tag: id: CONVERSIONS[id] if include COFFEE_ALIASES, id
return @tag_half_assignment tag if @prev() and @prev()[0] is 'ASSIGN' and include HALF_ASSIGNMENTS, tag
@token tag, id

8
src/nodes.coffee
View File

@ -612,7 +612,7 @@ exports.ClassNode: class ClassNode extends BaseNode
prop: new AssignNode(val, func)
props.push prop
if not constructor
unless constructor
if @parent
applied: new ValueNode(@parent, [new AccessorNode(literal('apply'))])
constructor: new AssignNode(@variable, new CodeNode([], new Expressions([
@ -878,7 +878,7 @@ exports.WhileNode: class WhileNode extends BaseNode
o.top: true
cond: @condition.compile(o)
set: ''
if not top
unless top
rvar: o.scope.free_variable()
set: "$@tab$rvar = [];\n"
@body: PushNode.wrap(rvar, @body) if @body
@ -1129,7 +1129,7 @@ exports.ForNode: class ForNode extends BaseNode
var_part: new AssignNode(@name, literal("$svar[$ivar]")).compile(merge o, {indent: @idt(1), top: true}) + "\n"
else
var_part: "$body_dent$name = $svar[$ivar];\n" if name
if not @object
unless @object
lvar: scope.free_variable()
step_part: if @step then "$ivar += ${ @step.compile(o) }" else "$ivar++"
for_part: "$ivar = 0, $lvar = ${svar}.length; $ivar < $lvar; $step_part"
@ -1188,7 +1188,7 @@ exports.IfNode: class IfNode extends BaseNode
# Ensure that the switch expression isn't evaluated more than once.
rewrite_switch: (o) ->
assigner: @switcher
if not (@switcher.unwrap() instanceof LiteralNode)
unless @switcher.unwrap() instanceof LiteralNode
variable: literal(o.scope.free_variable())
assigner: new AssignNode(variable, @switcher)
@switcher: variable