C++ Interfacing:'static' array function parameter contradiction

[ParticlePeter via Digitalmars-d-learn]

On Friday, 28 April 2017 at 17:57:34 UTC, Ali Çehreli wrote:
> On 04/28/2017 08:56 AM, ParticlePeter wrote:
> > C++ Function:
> > bool cppFunc( float[3] color );
> >
> > D binding:
> > extern(C++) bool cppFunc( float[3] color );
> >
> > Using with:
> > float[3] my_color;
> > cppFunc( my_color );
> >
> > -> Error: Internal Compiler Error: unable to pass static
> array to
>
> That part is a bug at least in the compiler message. Is it 
> really an internal ctompiler error? Doesn't look like it: the 
> compiler is talking to us happily. :)
>
> My simple test works for me:
>
> // deneme.cpp
> float cppFunc(float color[3]) {
>     return color[0] + color[1] + color[2];
> }
>
> $ g++ -c deneme.cpp -o deneme_cpp.o
>
> // deneme.d
> extern(C++) float cppFunc(float * color);
>
> void main() {
>     float[3] my_color = [ 1.5, 2.5, 3.5 ] ;
>     assert(cppFunc(my_color.ptr) == 7.5);
> }
>
> $ dmd deneme_cpp.o deneme.d -of=deneme
>
> Builds and runs fine... on Linux... I don't know whether that's 
> significant.
>
> Ali

Btw, according to [1] your example should not work either, I 
doubt that there is a difference between C and C++ interfacing, 
it should be:

extern(C++) float cppFunc( ref float[3] color );

In my case its a linker error as well.

[1] http://dlang.org/spec/interfaceToC.html#passing_d_array