On Wednesday, 23 December 2020 at 18:03:56 UTC, frame wrote:
It's not the problem mentioned but I had to struggle with DLLs
and D's Variant-type. The problem is that Variant uses TypeInfo
which does not pass DLL boundaries correctly so that int != int
in runtime even it's in fact a simple int.
If you need to exchange unknown data between a DLL and your
application you need to get a workaround and cannot use that
elsewhere settled nice feature. But it's a Windows specific
issue - it works as expected on other systems.
Which is basically same as in C++, despite the fact it does have
real working SO/DLL runtime's many large projects have their own
RTTI implementation. LLVM has its own RTTI because standard type
info is "inefficient", Unreal Engine has its own, IIRC Qt too has
its own, etc...
Same thing with D Variant, some people say it is "inefficient"...
so we ended up having multiple libraries.
Not saying anything about how good or bad all this, just the
facts.
