[SDL] Compile-time error when forward declaring Mix_Chunk

[Gianfranco Berardi]

Vassilis Virvilis wrote:
> 
> In my setup I can't forward declare Mix_Music;
> 
> The reason people are using this typedef trick is to provide an
> opaque pointer. This is a  pointer where the programmer cannot reach
> the internal variables freely. Unfortunately in C++ which
> has proper access mechanisms (private, protected) that means
> we have to drag the whole header file in our headers.
> 

Ah, thank you for clarifying this issue. I was going to try to include 
the header in my header, but I didn't want to do so without 
understanding why I felt I had to do so.  Now I see it is pretty much 
required.

Thanks again,
Gianfranco

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