[Issue 21690] Unable to dynamic cast extern(C++) classes

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=21690

--- Comment #4 from kinke <kinke at gmx.net> ---
(In reply to thomas.bockman from comment #3)
> Does that mean that passing a D-initialized extern(C++) class instance to
> C++ code breaks dynamic casting on the C++ side, too?

AFAIK, yes.

> Given that all current D compilers are also C++ compilers

They most definitely aren't - they are D compilers, with the ability to interop
with C++ in many cases, but quite obviously not in all aspects. See point 33.1
and 33.13 on https://dlang.org/spec/cpp_interface.html.

--