C++ binding issues with C++ function returning a simple POD struct.

[ParticlePeter via Digitalmars-d-learn]

On Monday, 22 May 2017 at 07:24:20 UTC, evilrat wrote:
> On Monday, 22 May 2017 at 06:33:37 UTC, ParticlePeter wrote:
>> On Monday, 22 May 2017 at 01:39:04 UTC, evilrat wrote:
>>>
>>> And this is actually D problem. In fact first bug report on 
>>> this thing was dated back to  2014. Still not fixed.
>>
>> Thanks for your reply, do you have any links to some bug 
>> report of that issue?
>>
>
> Just search for "c++ struct"
> https://issues.dlang.org/buglist.cgi?quicksearch=c%2B%2B%20struct
>
> https://issues.dlang.org/show_bug.cgi?id=13207
> https://issues.dlang.org/show_bug.cgi?id=16527

That's really old, and of essential requirement I would assume. 
Thanks, I will comment the bug.

>>
>> Actually, your example would work just fine, my problem and 
>> possible solution is the other way around :-). First I'll try 
>> to force a copy with a wrapper func and same sig.
>
> You mean from D to C++? Well, that sucks.

No, no, this (other) way around :-), still C++ to D. It actually 
works btw:

-------- HACK -------------------
// original C++
ImVec2 GetCursorPos();

// C++ helper
void GetCursorPos(ImVec2& result) {
   result = GetCursorPos();
}

// bind with
extern(C++)
void GetCursorPos(ref ImVec2 result);
----------------------------------