Re: Is there an equivalent of #define ... #ifndef ... #endif in lilypond?

[Helge Kruse]

Am 19.02.2012 11:48, schrieb Michael Hendry:

> So it would be:
>
> #define debugging
>
> ... several pages of code ...
>
> #ifdef debugging
> ... print something on the screen, and await a user response ...
> #endif
>
> ... several more pages of code ...
>
> #ifdef debugging
> ... do something else that's useful in the debugging process ...
> #endif
>
> ... and so on ...
>
>
> I envisage a series of #define statements at the head of the main .ly 
file
> such as:
>
> #define concert_part
> #define guitar_part
> #undef alto_part
> #define clarinet_part

Ok, if you want to use the C preprocessor syntax, you can just use the C 
preprocessor. Add a short script the passes your source file through the 
C preprocessor to a temporary file and start Lilypond with that file.

If you just don't have your C compiler at the PC you can use a 
preprocessor implementation like this: http://mcpp.sourceforge.net/


Helge