// > Enforces the notion of 'classes' as a structure, maintains simple inheritance, and allows for super method calling.
//
// [http://ejohn.org/blog/simple-javascript-inheritance/](http://ejohn.org/blog/simple-javascript-inheritance/)
(function(){
    var initializing = false, fnTest = /xyz/.test(function(){xyz;}) ? /\b_super\b/ : /.*/;
    // The base Class implementation (does nothing)
    this.Class = function(){};
    // Create a new Class that inherits from this class
    Class.extend = function() {
        var _super = this.prototype;
        // Instantiate a base class (but only create the instance,
        // don't run the initialize constructor)
        initializing = true;
        var prototype = new this();
        initializing = false;
        // Copy the properties over onto the new prototype
        for (var i=0; i < arguments.length; i++) {
            var prop = arguments[i];
            for (var name in prop) {
                // Check if we're overwriting an existing function
                prototype[name] = typeof prop[name] == "function" &&
                    typeof _super[name] == "function" && fnTest.test(prop[name]) ?
                    (function(name, fn){
                        return function() {
                            var tmp = this._super;
                            // Add a new ._super() method that is the same method
                            // but on the super-class
                            this._super = _super[name];
                            // The method only need to be bound temporarily, so we
                            // remove it when we're done executing
                            var ret = fn.apply(this, arguments);
                            this._super = tmp;
                            return ret;
                        };
                    })(name, prop[name]) :
                    prop[name];
            }
        }
        // The dummy class constructor
        function Class() {
            // All construction is actually done in the initialize method
            if ( !initializing && this.initialize )
                this.initialize.apply(this, arguments);
        }
        // Populate our constructed prototype object
        Class.prototype = prototype;
        // Enforce the constructor to be what we expect
        Class.constructor = Class;
        // And make this class extendable
        Class.extend = arguments.callee;
        return Class;
    };
})();