vnCustomTags = {};

var Mutators = Class.Mutators;

var _Extends = Mutators.Extends;

Mutators.Extends = function ()
{
	_Extends.apply (this, arguments);
	this.implement ({Properties: {}});
}

Mutators.Tag = function (tagName)
{
	vnCustomTags[tagName] = this;
	this.extend ({Tag: tagName});
};

Mutators.Properties = function (props)
{
	var parentProps;
	
	for (var propName in props)
	{
		var prop = props[propName];
		prop.configurable = true;
	
		if (!prop.get && !prop.set && prop.writable === undefined)
			prop.writable = true;
	}

	if (this.parent && (parentProps = this.parent.Properties))
	for (var propName in parentProps)
	if (!props[propName])
		props[propName] = parentProps[propName];
		
	this.extend ({Properties: props});
	Object.defineProperties (this.prototype, props);
};

Mutators.Parent = function (propName)
{
	this.extend ({Parent: propName});
};

Mutators.Child = function (propName)
{
	this.extend ({Child: propName});
};