kotovalexarian-likes-github
/
jashkenas--coffeescript
mirror of https://github.com/jashkenas/coffeescript.git
1
0
Fork 0
Code Releases Activity

s/tempVars/tempVars.general/ This should allow us to store more than one 

category of temporary variables.
This commit is contained in:
Stan Angeloff 2010-09-19 14:36:37 +03:00
parent 08e1101c1f
commit 1f2c6c77fd
2 changed files with 23 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
lib/scope.js
View File

@ -6,17 +6,24 @@
}
exports.Scope = (function() {
Scope = function(parent, expressions, method) {
var _a;
var _a, _b, k, val;
_a = [parent, expressions, method];
this.parent = _a[0];
this.expressions = _a[1];
this.method = _a[2];
this.variables = {};
this.tempVars = {
general: '_a'
};
if (this.parent) {
this.tempVar = this.parent.tempVar;
_b = this.parent.tempVars;
for (k in _b) {
if (!__hasProp.call(_b, k)) continue;
val = _b[k];
(this.tempVars[k] = val);
}
} else {
Scope.root = this;
this.tempVar = '_a';
}
return this;
};
@ -53,12 +60,12 @@
};
Scope.prototype.freeVariable = function() {
var ordinal;
while (this.check(this.tempVar)) {
ordinal = 1 + parseInt(this.tempVar.substr(1), 36);
this.tempVar = '_' + ordinal.toString(36).replace(/\d/g, 'a');
while (this.check(this.tempVars.general)) {
ordinal = 1 + parseInt(this.tempVars.general.substr(1), 36);
this.tempVars.general = '_' + ordinal.toString(36).replace(/\d/g, 'a');
}
this.variables[this.tempVar] = 'var';
return this.tempVar;
this.variables[this.tempVars.general] = 'var';
return this.tempVars.general;
};
Scope.prototype.assign = function(name, value) {
return (this.variables[name] = {

15
src/scope.coffee
View File

@ -20,11 +20,12 @@ exports.Scope = class Scope
constructor: (parent, expressions, method) ->
[@parent, @expressions, @method] = [parent, expressions, method]
@variables = {}
@tempVars =
general: '_a'
if @parent
@tempVar = @parent.tempVar
(@tempVars[k] = val) for k, val of @parent.tempVars
else
Scope.root = this
@tempVar = '_a'
# Look up a variable name in lexical scope, and declare it if it does not
# already exist.
@ -54,11 +55,11 @@ exports.Scope = class Scope
# If we need to store an intermediate result, find an available name for a
# compiler-generated variable. `_a`, `_b`, and so on...
freeVariable: ->
while @check @tempVar
ordinal = 1 + parseInt @tempVar.substr(1), 36
@tempVar = '_' + ordinal.toString(36).replace(/\d/g, 'a')
@variables[@tempVar] = 'var'
@tempVar
while @check @tempVars.general
ordinal = 1 + parseInt @tempVars.general.substr(1), 36
@tempVars.general = '_' + ordinal.toString(36).replace(/\d/g, 'a')
@variables[@tempVars.general] = 'var'
@tempVars.general
# Ensure that an assignment is made at the top of this scope
# (or at the top-level scope, if requested).