vnfmarket/src/main/webapp/vnfmarket/node_modules/uglify-js/lib/squeeze-more.js

   1 var jsp = require("./parse-js"),
   2     pro = require("./process"),
   3     slice = jsp.slice,
   4     member = jsp.member,
   5     curry = jsp.curry,
   6     MAP = pro.MAP,
   7     PRECEDENCE = jsp.PRECEDENCE,
   8     OPERATORS = jsp.OPERATORS;
   9
  10 function ast_squeeze_more(ast) {
  11         var w = pro.ast_walker(), walk = w.walk, scope;
  12         function with_scope(s, cont) {
  13                 var save = scope, ret;
  14                 scope = s;
  15                 ret = cont();
  16                 scope = save;
  17                 return ret;
  18         };
  19         function _lambda(name, args, body) {
  20                 return [ this[0], name, args, with_scope(body.scope, curry(MAP, body, walk)) ];
  21         };
  22         return w.with_walkers({
  23                 "toplevel": function(body) {
  24                         return [ this[0], with_scope(this.scope, curry(MAP, body, walk)) ];
  25                 },
  26                 "function": _lambda,
  27                 "defun": _lambda,
  28                 "new": function(ctor, args) {
  29                         if (ctor[0] == "name") {
  30                                 if (ctor[1] == "Array" && !scope.has("Array")) {
  31                                         if (args.length != 1) {
  32                                                 return [ "array", args ];
  33                                         } else {
  34                                                 return walk([ "call", [ "name", "Array" ], args ]);
  35                                         }
  36                                 } else if (ctor[1] == "Object" && !scope.has("Object")) {
  37                                         if (!args.length) {
  38                                                 return [ "object", [] ];
  39                                         } else {
  40                                                 return walk([ "call", [ "name", "Object" ], args ]);
  41                                         }
  42                                 } else if ((ctor[1] == "RegExp" || ctor[1] == "Function" || ctor[1] == "Error") && !scope.has(ctor[1])) {
  43                                         return walk([ "call", [ "name", ctor[1] ], args]);
  44                                 }
  45                         }
  46                 },
  47                 "call": function(expr, args) {
  48                         if (expr[0] == "dot" && expr[2] == "toString" && args.length == 0) {
  49                                 // foo.toString()  ==>  foo+""
  50                                 return [ "binary", "+", expr[1], [ "string", "" ]];
  51                         }
  52                         if (expr[0] == "name") {
  53                                 if (expr[1] == "Array" && args.length != 1 && !scope.has("Array")) {
  54                                         return [ "array", args ];
  55                                 }
  56                                 if (expr[1] == "Object" && !args.length && !scope.has("Object")) {
  57                                         return [ "object", [] ];
  58                                 }
  59                                 if (expr[1] == "String" && !scope.has("String")) {
  60                                         return [ "binary", "+", args[0], [ "string", "" ]];
  61                                 }
  62                         }
  63                 }
  64         }, function() {
  65                 return walk(pro.ast_add_scope(ast));
  66         });
  67 };
  68
  69 exports.ast_squeeze_more = ast_squeeze_more;