text: /***********************************************************************
  
    A JavaScript tokenizer / parser / beautifier / compressor.
    https://github.com/mishoo/UglifyJS
  
    -------------------------------- (C) ---------------------------------
  
                             Author: Mihai Bazon
                           <mihai.bazon@gmail.com>
                         http://mihai.bazon.net/blog
  
    Distributed under the BSD license:
  
      Copyright 2012 (c) Mihai Bazon <mihai.bazon@gmail.com>
  
      Redistribution and use in source and binary forms, with or without
      modification, are permitted provided that the following conditions
      are met:
  
          * Redistributions of source code must retain the above
            copyright notice, this list of conditions and the following
            disclaimer.
  
          * Redistributions in binary form must reproduce the above
            copyright notice, this list of conditions and the following
            disclaimer in the documentation and/or other materials
            provided with the distribution.
  
      THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
      EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
      IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
      PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
      LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
      OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
      PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
      PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
      THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
      TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
      THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
      SUCH DAMAGE.
  
   ***********************************************************************/
  
  "use strict";
  
  function TreeTransformer(before, after) {
      TreeWalker.call(this);
      this.before = before;
      this.after = after;
  }
  TreeTransformer.prototype = new TreeWalker;
  
  (function(DEF) {
      function do_list(list, tw) {
          return List(list, function(node) {
              return node.transform(tw, true);
          });
      }
  
      DEF(AST_Node, noop);
      DEF(AST_LabeledStatement, function(self, tw) {
          self.label = self.label.transform(tw);
          self.body = self.body.transform(tw);
      });
      DEF(AST_SimpleStatement, function(self, tw) {
          self.body = self.body.transform(tw);
      });
      DEF(AST_Block, function(self, tw) {
          self.body = do_list(self.body, tw);
      });
      DEF(AST_Do, function(self, tw) {
          self.body = self.body.transform(tw);
          self.condition = self.condition.transform(tw);
      });
      DEF(AST_While, function(self, tw) {
          self.condition = self.condition.transform(tw);
          self.body = self.body.transform(tw);
      });
      DEF(AST_For, function(self, tw) {
          if (self.init) self.init = self.init.transform(tw);
          if (self.condition) self.condition = self.condition.transform(tw);
          if (self.step) self.step = self.step.transform(tw);
          self.body = self.body.transform(tw);
      });
      DEF(AST_ForIn, function(self, tw) {
          self.init = self.init.transform(tw);
          self.object = self.object.transform(tw);
          self.body = self.body.transform(tw);
      });
      DEF(AST_With, function(self, tw) {
          self.expression = self.expression.transform(tw);
          self.body = self.body.transform(tw);
      });
      DEF(AST_Exit, function(self, tw) {
          if (self.value) self.value = self.value.transform(tw);
      });
      DEF(AST_LoopControl, function(self, tw) {
          if (self.label) self.label = self.label.transform(tw);
      });
      DEF(AST_If, function(self, tw) {
          self.condition = self.condition.transform(tw);
          self.body = self.body.transform(tw);
          if (self.alternative) self.alternative = self.alternative.transform(tw);
      });
      DEF(AST_Switch, function(self, tw) {
          self.expression = self.expression.transform(tw);
          self.body = do_list(self.body, tw);
      });
      DEF(AST_Case, function(self, tw) {
          self.expression = self.expression.transform(tw);
          self.body = do_list(self.body, tw);
      });
      DEF(AST_Try, function(self, tw) {
          self.body = do_list(self.body, tw);
          if (self.bcatch) self.bcatch = self.bcatch.transform(tw);
          if (self.bfinally) self.bfinally = self.bfinally.transform(tw);
      });
      DEF(AST_Catch, function(self, tw) {
          self.argname = self.argname.transform(tw);
          self.body = do_list(self.body, tw);
      });
      DEF(AST_Definitions, function(self, tw) {
          self.definitions = do_list(self.definitions, tw);
      });
      DEF(AST_VarDef, function(self, tw) {
          self.name = self.name.transform(tw);
          if (self.value) self.value = self.value.transform(tw);
      });
      DEF(AST_Lambda, function(self, tw) {
          if (self.name) self.name = self.name.transform(tw);
          self.argnames = do_list(self.argnames, tw);
          self.body = do_list(self.body, tw);
      });
      DEF(AST_Call, function(self, tw) {
          self.expression = self.expression.transform(tw);
          self.args = do_list(self.args, tw);
      });
      DEF(AST_Sequence, function(self, tw) {
          self.expressions = do_list(self.expressions, tw);
      });
      DEF(AST_Dot, function(self, tw) {
          self.expression = self.expression.transform(tw);
      });
      DEF(AST_Sub, function(self, tw) {
          self.expression = self.expression.transform(tw);
          self.property = self.property.transform(tw);
      });
      DEF(AST_Unary, function(self, tw) {
          self.expression = self.expression.transform(tw);
      });
      DEF(AST_Binary, function(self, tw) {
          self.left = self.left.transform(tw);
          self.right = self.right.transform(tw);
      });
      DEF(AST_Conditional, function(self, tw) {
          self.condition = self.condition.transform(tw);
          self.consequent = self.consequent.transform(tw);
          self.alternative = self.alternative.transform(tw);
      });
      DEF(AST_Array, function(self, tw) {
          self.elements = do_list(self.elements, tw);
      });
      DEF(AST_Object, function(self, tw) {
          self.properties = do_list(self.properties, tw);
      });
      DEF(AST_ObjectProperty, function(self, tw) {
          self.value = self.value.transform(tw);
      });
  })(function(node, descend) {
      node.DEFMETHOD("transform", function(tw, in_list) {
          var x, y;
          tw.push(this);
          if (tw.before) x = tw.before(this, descend, in_list);
          if (typeof x === "undefined") {
              x = this;
              descend(x, tw);
              if (tw.after) {
                  y = tw.after(x, in_list);
                  if (typeof y !== "undefined") x = y;
              }
          }
          tw.pop();
          return x;
      });
  });
  