John Reimer wrote:
In D (windows) it would look like so (assuming you have done away with
the compilers internal detection of COM interfaces):
extern(C++) interface IUnknown:
{
extern(Windows):
int QueryInterface(nsIID* uuid, void **result);
int AddRef();
int Release();
}
I bet it would work fine and would be a good way to avoid the
special-cased interfaces providing COM support in D. Instead we've
special-cased for C++, which is, at least, a more general case. ;-)
There is one other problem. COM objects are not collected by the garbage
collector because they are reference counted. Deriving from IUnknown
means its a COM object which sets a flag in the ClassInfo, directing the
garbage collector to not collect it. In fact, COM objects are allocated
using malloc(). IUnknown.Release() uses free() to deallocate them.
