Re: How to pass a class by (const) reference to C++

[Ola Fosheim Grøstad via Digitalmars-d-learn]

On Monday, 13 December 2021 at 12:08:30 UTC, evilrat wrote:

Yeah but it sucks to have making C++ wrapper just for this. I think either pragma mangle to hammer it in place or helper dummy struct with class layout that mimics this shim logic is a better solution in such cases.

Literally anything but building C++ code twice for a project.

Does something like this work?


```
class _A {}
struct A {}

extern(C++) void CppFunc(ref const(A) arg);

void func(_A a){
    CppFunc(*cast(A*)a);
}
```