Re: Issue 2088 in lilypond: pointer confusion with clang++

[lilypond]

Comment #1 on issue 2088 by address@hidden: pointer confusion with  
clang++
http://code.google.com/p/lilypond/issues/detail?id=2088

The existing code uses a G++ extension (described in GCC manual 7.6), which  
allows this conversion of member function pointer to straight function  
pointer.  If you remove the -Wno-pmf-conversions from makefile in lily  
directory, you will see warnings from g++ at the same places clang++ shows  
errors.

These warnings/errors can be eliminated by changing the two typedefs at the  
end of lily-proto.hh to:

typedef void (Engraver::* Engraver_void_function_engraver_grob_info)  
(Grob_info);
typedef void (Translator::* Translator_void_method_ptr) ();

but this creates trouble when the pointers are used, for example in  
Translator_method_binding::invoke().  I have to head to work now, but I  
will look more closely at it over the weekend and see if I can suggest a  
fix.  The extension is presumably used as an optimization, so obviously it  
would be best if the solution does not create performance problems.