/***********************************************************************

 A JavaScript tokenizer / parser / beautifier / compressor.
 https://github.com/mishoo/UglifyJS2

 -------------------------------- (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 MAP(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;
});

});