[Issue 4779] New: www.d-programming-language.org "Interfacing to C" should make clear how to do callbacks

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=4779

           Summary: www.d-programming-language.org "Interfacing to C"
                    should make clear how to do callbacks
           Product: D
           Version: D2
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: enhancement
          Priority: P2
         Component: websites
        AssignedTo: nobody at puremagic.com
        ReportedBy: cruxic at gmail.com


--- Comment #0 from AdamB <cruxic at gmail.com> 2010-08-31 21:59:06 PDT ---
Callbacks are an essential part of interfacing with C code.  The "Interfacing
to C" document comes close to telling you how to setup a callback but assumes
the reader knows about the "function" keyword already.  In the section where it
says:

"C code can correspondingly call D functions, if the D functions use an
attribute that is compatible with the C compiler, most likely the extern
(C)..."

There should be an example showing how to setup the binding like so:

  extern (C) void registerSomeCallback(void function(int,int) yourFunc);

And then it should hyperlink to the "Delegates, Function Pointers, and
Closures" section in /function.html.

I'd be glad to make these changes myself if you like.

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