WeakRefs for a CPP->D wrapper

[MGW]

> Hi yes I think noticed in another thread that you were wrapping 
> Qt with dynamic loading of the qt libs, interesting idea - does 
> your code allow subclassing of the Qt classes and overriding 
> the virtual methods? I'm taking a much more traditional 
> approach, but there is method in my madness :-)

I found a way to bypass the restriction associated with virtual 
methods. In a virtual method C + + code I put a call D code.

More examples with wrapping Qt:
https://github.com/MGWL/QtE-Qt_for_Dlang_and_Forth