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Viewing changes to tools/eliminator/node_modules/uglify-js/lib/squeeze-more.js

  • Committer: Package Import Robot
  • Author(s): Sylvestre Ledru
  • Date: 2013-05-02 13:11:51 UTC
  • Revision ID: package-import@ubuntu.com-20130502131151-q8dvteqr1ef2x7xz
Tags: upstream-1.4.1~20130504~adb56cb
Import upstream version 1.4.1~20130504~adb56cb

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tools/eliminator/node_modules/uglify-js/lib/squeeze-more.js
 
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var jsp = require("./parse-js"),
 
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    pro = require("./process"),
 
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    slice = jsp.slice,
 
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    member = jsp.member,
 
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    curry = jsp.curry,
 
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    MAP = pro.MAP,
 
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    PRECEDENCE = jsp.PRECEDENCE,
 
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    OPERATORS = jsp.OPERATORS;
 
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function ast_squeeze_more(ast) {
 
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        var w = pro.ast_walker(), walk = w.walk, scope;
 
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        function with_scope(s, cont) {
 
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                var save = scope, ret;
 
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                scope = s;
 
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                ret = cont();
 
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                scope = save;
 
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                return ret;
 
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        };
 
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        function _lambda(name, args, body) {
 
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                return [ this[0], name, args, with_scope(body.scope, curry(MAP, body, walk)) ];
 
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        };
 
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        return w.with_walkers({
 
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                "toplevel": function(body) {
 
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                        return [ this[0], with_scope(this.scope, curry(MAP, body, walk)) ];
 
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                },
 
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                "function": _lambda,
 
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                "defun": _lambda,
 
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                "new": function(ctor, args) {
 
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                        if (ctor[0] == "name" && ctor[1] == "Array" && !scope.has("Array")) {
 
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                                if (args.length != 1) {
 
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                                        return [ "array", args ];
 
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                                } else {
 
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                                        return walk([ "call", [ "name", "Array" ], args ]);
 
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                                }
 
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                        }
 
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                },
 
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                "call": function(expr, args) {
 
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                        if (expr[0] == "dot" && expr[2] == "toString" && args.length == 0) {
 
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                                // foo.toString()  ==>  foo+""
 
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                                return [ "binary", "+", expr[1], [ "string", "" ]];
 
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                        }
 
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                        if (expr[0] == "name" && expr[1] == "Array" && args.length != 1 && !scope.has("Array")) {
 
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                                return [ "array", args ];
 
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                        }
 
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                }
 
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        }, function() {
 
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                return walk(pro.ast_add_scope(ast));
 
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        });
 
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};
 
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exports.ast_squeeze_more = ast_squeeze_more;