node/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     PRECEDENCE = jsp.PRECEDENCE,
   6     OPERATORS = jsp.OPERATORS;
   7
   8 function ast_squeeze_more(ast) {
   9         var w = pro.ast_walker(), walk = w.walk;
  10         return w.with_walkers({
  11                 "call": function(expr, args) {
  12                         if (expr[0] == "dot" && expr[2] == "toString" && args.length == 0) {
  13                                 // foo.toString()  ==>  foo+""
  14                                 return [ "binary", "+", expr[1], [ "string", "" ]];
  15                         }
  16                 }
  17         }, function() {
  18                 return walk(ast);
  19         });
  20 };
  21
  22 exports.ast_squeeze_more = ast_squeeze_more;