var Class=new Native({name:'Class',initialize:function(properties){properties=properties||{};var klass=function(empty){for(var key in this)this[key]=$unlink(this[key]);for(var mutator in Class.Mutators){if(!this[mutator])continue;Class.Mutators[mutator](this,this[mutator]);delete this[mutator];}
this.constructor=klass;if(empty===$empty)return this;var self=(this.initialize)?this.initialize.apply(this,arguments):this;if(this.options&&this.options.initialize)this.options.initialize.call(this);return self;};$extend(klass,this);klass.constructor=Class;klass.prototype=properties;return klass;}});Class.implement({implement:function(){Class.Mutators.Implements(this.prototype,Array.slice(arguments));return this;}});Class.Mutators={Implements:function(self,klasses){$splat(klasses).each(function(klass){$extend(self,($type(klass)=='class')?new klass($empty):klass);});},Extends:function(self,klass){var instance=new klass($empty);delete instance.parent;delete instance.parentOf;for(var key in instance){var current=self[key],previous=instance[key];if(current==undefined){self[key]=previous;continue;}
var ctype=$type(current),ptype=$type(previous);if(ctype!=ptype)continue;switch(ctype){case'function':if(!arguments.callee.caller)self[key]=eval('('+String(current).replace(/\bthis\.parent\(\s*(\))?/g,function(full,close){return'arguments.callee._parent_.call(this'+(close||', ');})+')');self[key]._parent_=previous;break;case'object':self[key]=$merge(previous,current);}}
self.parent=function(){return arguments.callee.caller._parent_.apply(this,arguments);};self.parentOf=function(descendant){return descendant._parent_.apply(this,Array.slice(arguments,1));};}};