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further minor cleanup to varargs

This commit is contained in:
Jeremy Ashkenas 2010-05-08 12:20:14 -04:00
parent c452c3a101
commit be72120311
3 changed files with 11 additions and 6 deletions
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3
lib/lexer.js
View File

@ -240,7 +240,8 @@
// balanced (ie. strings, JS literals).
Lexer.prototype.balanced_token = function balanced_token() {
var delimited;
delimited = __slice.call(arguments, 0, arguments.length - 0);
var _d = arguments.length;
delimited = __slice.call(arguments, 0, _d - 0);
return balanced_string(this.chunk, delimited);
};
// Matches and conumes comments. We pass through comments into JavaScript,

8
lib/nodes.js
View File

@ -1153,15 +1153,17 @@
// Compiling a parameter splat means recovering the parameters that succeed
// the splat in the parameter list, by slicing the arguments object.
SplatNode.prototype.compile_param = function compile_param(o) {
var _b, _c, name, pos, trailing;
var _b, _c, len, name, pos, trailing;
name = this.name.compile(o);
o.scope.find(name);
len = o.scope.free_variable();
o.scope.assign(len, "arguments.length");
_b = this.trailings;
for (pos = 0, _c = _b.length; pos < _c; pos++) {
trailing = _b[pos];
o.scope.assign(trailing.compile(o), ("arguments[arguments.length - " + (this.trailings.length + pos) + "]"));
o.scope.assign(trailing.compile(o), ("arguments[" + len + " - " + (this.trailings.length + pos) + "]"));
}
return "" + name + " = " + (utility('slice')) + ".call(arguments, " + this.index + ", arguments.length - " + (this.trailings.length) + ")";
return "" + name + " = " + (utility('slice')) + ".call(arguments, " + this.index + ", " + len + " - " + (this.trailings.length) + ")";
};
// A compiling a splat as a destructuring assignment means slicing arguments
// from the right-hand-side's corresponding array.

6
src/nodes.coffee
View File

@ -828,9 +828,11 @@ exports.SplatNode: class SplatNode extends BaseNode
compile_param: (o) ->
name: @name.compile(o)
o.scope.find name
len: o.scope.free_variable()
o.scope.assign len, "arguments.length"
for trailing, pos in @trailings
o.scope.assign(trailing.compile(o), "arguments[arguments.length - ${@trailings.length + pos}]")
"$name = ${utility('slice')}.call(arguments, $@index, arguments.length - ${@trailings.length})"
o.scope.assign(trailing.compile(o), "arguments[$len - ${@trailings.length + pos}]")
"$name = ${utility('slice')}.call(arguments, $@index, $len - ${@trailings.length})"
# A compiling a splat as a destructuring assignment means slicing arguments
# from the right-hand-side's corresponding array.