Request Assistance Calling D from C++: weird visibility issue inside struct and namespace

[evilrat]

On Wednesday, 8 November 2017 at 06:34:27 UTC, Andrew Edwards 
wrote:
>
> Modify example.cpp to:
>
>     ======================
>     // example.cpp
>     #include "example.h"
>     namespace SomeApi {}
>     struct SomeStruct {}
>     void call_cpp() {
>         foo("do great things");
>         return;
>     }
>     ======================

>
> Compile and link and you have D program calling, calling C++, 
> which in turn calls D.
>
> My problem is that I've encountered an issue where this does 
> not work: when the function is being called from a namespace or 
> local scope in C++, the linker cannot find the definition. For 
> example:
>

just using fully qualified name didn't make it?

void call_cpp() {
     ::foo("do great things"); // calling global foo
     return;
}

>
> In a last-ditch effort, I placed all of these definitions into 
> dexample.d and, it compiled, but still filed to linking:
>

Are you sure you put it in a namespace in C++ too?

otherwise there might be some name mangling incompatibility that 
probably worth filling a bug report