Get class size of object

[JS]

I think you're missing the point to some degree(I realize there 
is a diff between an object and a type, but I should be able to 
easily get the class size of an object at run time regardless if 
the object is typed as a base class). The code below does this, 
but at a cost of verbosity.

Here is code that exactly demonstrates what I am essentially 
trying to do. The only drawback now is having to mixin the 
template for each class which I would want to automate and it 
would be nice to wrap the RT and CT methods in subclasses without 
overhead.

http://dpaste.dzfl.pl/757eeb05



Note, I can easily get the class size, name, etc... by using the 
object or the type.



import std.stdio;



mixin template tObject(alias T)
{
	override @property int classSize() { return 
__traits(classInstanceSize, T); };
	override @property string className() { return T.stringof; };
	immutable static int ClassSize = __traits(classInstanceSize, T);
	immutable static string ClassName = T.stringof;
	static T New(Args...)(Args args) { writeln(T.ClassSize); return 
new T(args); }

}

interface iObject(T)
{
	@property int classSize();
	@property string className();
	
}

class A : iObject!A
{
	double x;
         mixin tObject!A;
}

class B : A
{
	double y;
         mixin tObject!B;
	double z, t;
}


void main()
{
	A a = A.New();
         A b = B.New();
	writeln(a.classSize);
	writeln(b.classSize);
	readln;
}