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digitalmars.D - UDAs and templates

So I have this use case:

struct MarkedForMagic
{
    mixin template Lookup()
    {
        static this()
        {
            /* Look up all types, attributed with  MarkedForMagic and do
something with them. */
        }
    }
}

 MarkedForMagic class Magical1 { }
 MarkedForMagic class Magical2 { }

mixin MarkedForMagic,Lookup;

This question is: how do I register classes, which are inside templates?

 MarkedForMagic class Magical3(Type) { }

The symbol "Magical3" is not a class, but it contains potentially infinite
classes, every existing ones of which I need to know about.
How do I do this?

-- 
Bye,
Gor Gyolchanyan.
Dec 18 2012