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

  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,</td></tr></table>
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.name;
            try {
                throw err;
            } catch (e) {
                return e.stack;
            }
        }
    });
}

function DefaultsError(msg, defs) {
    this.message = msg;
    this.defs = defs;
}
DefaultsError.prototype = Object.create(Error.prototype);
DefaultsError.prototype.constructor = DefaultsError;
DefaultsError.prototype.name = "DefaultsError";
configure_error_stack(DefaultsError);

function defaults(args, defs, croak) {
    if (croak) for (var i in args) {
        if (HOP(args, i) && !HOP(defs, i)) throw new DefaultsError("`" + i + "` is not a supported option", defs);
    }
    for (var i in args) {
        if (HOP(args, i)) defs[i] = args[i];
    }
    return defs;
}

function merge(obj, ext) {
    var count = 0;
    for (var i in ext) if (HOP(ext, i)) {
        obj[i] = ext[i];
        count++;
    }
    return count;
}

function noop() {}
function return_false() { return false; }
function return_true() { return true; }
function return_this() { return this; }
function return_null() { return null; }

var List = (function() {
    function List(a, f, backwards) {
        var ret = [], top = [], i;
        function doit() {
            var val = f(a[i], i);
            var is_last = val instanceof Last;
            if (is_last) val = val.v;
            if (val instanceof AtTop) {
                val = val.v;
                if (val instanceof Splice) {
                    top.push.apply(top, backwards ? val.v.slice().reverse() : val.v);
                } else {
                    top.push(val);
                }
            } else if (val !== skip) {
                if (val instanceof Splice) {
                    ret.push.apply(ret, backwards ? val.v.slice().reverse() : val.v);
                } else {
                    ret.push(val);
                }
            }
            return is_last;
        }
        if (Array.isArray(a)) {
            if (backwards) {
                for (i = a.length; --i >= 0;) if (doit()) break;
                ret.reverse();
                top.reverse();
            } else {
                for (i = 0; i < a.length; ++i) if (doit()) break;
            }
        } else {
            for (i in a) if (HOP(a, i)) if (doit()) break;
        }
        return top.concat(ret);
    }
    List.at_top = function(val) { return new AtTop(val); };
    List.splice = function(val) { return new Splice(val); };
    List.last = function(val) { return new Last(val); };
    var skip = List.skip = {};
    function AtTop(val) { this.v = val; }
    function Splice(val) { this.v = val; }
    function Last(val) { this.v = val; }
    return List;
})();

function push_uniq(array, el) {
    if (array.indexOf(el) < 0) return array.push(el);
}

function string_template(text, props) {
    return text.replace(/\{(.+?)\}/g, function(str, p) {
        return props && props[p];
    });
}

function remove(array, el) {
    var index = array.indexOf(el);
    if (index >= 0) array.splice(index, 1);
}

function makePredicate(words) {
    if (!Array.isArray(words)) words = words.split(" ");
    var map = Object.create(null);
    words.forEach(function(word) {
        map[word] = true;
    });
    return map;
}

function all(array, predicate) {
    for (var i = array.length; --i >= 0;)
        if (!predicate(array[i], i))
            return false;
    return true;
}

function Dictionary() {
    this._values = Object.create(null);
    this._size = 0;
}
Dictionary.prototype = {
    set: function(key, val) {
        if (!this.has(key)) ++this._size;
        this._values["$" + key] = val;
        return this;
    },
    add: function(key, val) {
        if (this.has(key)) {
            this.get(key).push(val);
        } else {
            this.set(key, [ val ]);
        }
        return this;
    },
    get: function(key) { return this._values["$" + key] },
    del: function(key) {
        if (this.has(key)) {
            --this._size;
            delete this._values["$" + key];
        }
        return this;
    },
    has: function(key) { return ("$" + key) in this._values },
    all: function(predicate) {
        for (var i in this._values)
            if (!predicate(this._values[i], i.substr(1)))
                return false;
        return true;
    },
    each: function(f) {
        for (var i in this._values)
            f(this._values[i], i.substr(1));
    },
    size: function() {
        return this._size;
    },
    map: function(f) {
        var ret = [];
        for (var i in this._values)
            ret.push(f(this._values[i], i.substr(1)));
        return ret;
    },
    clone: function() {
        var ret = new Dictionary();
        for (var i in this._values)
            ret._values[i] = this._values[i];
        ret._size = this._size;
        return ret;
    },
    toObject: function() { return this._values }
};
Dictionary.fromObject = function(obj) {
    var dict = new Dictionary();
    dict._size = merge(dict._values, obj);
    return dict;
};

function HOP(obj, prop) {
    return Object.prototype.hasOwnProperty.call(obj, prop);
}

// return true if the node at the top of the stack (that means the
// innermost node in the current output) is lexically the first in
// a statement.
function first_in_statement(stack) {
    var node = stack.parent(-1);
    for (var i = 0, p; p = stack.parent(i++); node = p) {
        if (p.TYPE == "Call") {
            if (p.expression === node) continue;
        } else if (p instanceof AST_Binary) {
            if (p.left === node) continue;
        } else if (p instanceof AST_Conditional) {
            if (p.condition === node) continue;
        } else if (p instanceof AST_PropAccess) {
            if (p.expression === node) continue;
        } else if (p instanceof AST_Sequence) {
            if (p.expressions[0] === node) continue;
        } else if (p instanceof AST_Statement) {
            return p.body === node;
        } else if (p instanceof AST_UnaryPostfix) {
            if (p.expression === node) continue;
        }
        return false;
    }
}