I wonder if anyone has used COM in dlang extensively.
Context: I must use COM FFI interfacing on systems that aren't
necessarily Windows. It is essential that the layout of
interfaces and classes are the same than in equivalent C++
objects.
Question 1. Is it mandatory to inherit from
core.sys.windows.unknwn.IUnknown, or just having an interface
named "IUnknown" validate it for being a COM interface?
If yes, then how am I supposed to use COM interfaces in other
OSes? core.sys.windows.unknwn.IUnknown is defined under
version(Windows).
I wonder what the exact compiler hook is.
Question 2. If this fails, may I emulate COM vtable layout with
extern(C++) class? I wonder what the exact differences are anyway
between extern(C++) and the special IUnknown.
Question 3. It seems I can inherit both from A D object and a COM
interface. What will be the choosen layout?
