Struct default constructor - need some kind of solution for C++ interop

[Ethan Watson via Digitalmars-d]

On Wednesday, 7 September 2016 at 11:42:40 UTC, Dicebot wrote:
> If it is so, I'd call it a major extern(c++) bug.

The documentation seems to be correct. I can't extern( C++, class 
) or extern( C++, struct ) on an object, even in DMD 
2.071.2-beta3.

But ignoring that. My first member is offset by 8 bytes, even in 
an extern( C++ ) class. I assume it's just blindly sticking a 
vtable in there regardless of if I actually define virtual 
functions or not.

But regardless. Making it a class is still a bad idea since in 
this exact example it needs to exist on the stack/within an 
objects scope, which means you then need to further hack around 
with emplacement and wrappers and blah.

Binary matching, non-trivial constructors, and treating C++ 
objects like the value types they are will be required to make 
Binderoo work effortlessly. I've got two out of three of those. 
Not having any one of those is something of a deal breaker unless 
I get an effective workaround.