[Issue 21146] No introspection information on whether a class is COM or not

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=21146

Walter Bright <bugzilla at digitalmars.com> changed:

           What    |Removed                     |Added
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                 CC|                            |bugzilla at digitalmars.com

--- Comment #3 from Walter Bright <bugzilla at digitalmars.com> ---
IUnknown is declared as:

    extern(Windows)
    interface IUnknown {
        int QueryInterface(const(GUID)* riid, void** pvObject);
        uint AddRef();
        uint Release();
    }

GUID is:

  align(1) struct GUID {  // size is 16
    align(1):
    uint     Data1;
    ushort   Data2;
    ushort   Data3;
    ubyte[8] Data4;
  }

We could move these from core.sys.windows.basetyps and unknown to object.d.
Then Adam's prescription will work, without making the compiler more complex.

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