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

[Helge Kruse]

Am 18.02.2012 00:30, schrieb Michael Hendry:
> Obviously, I can comment out the sections I don't want during data entry
> work, and remove the comments once the work is complete, but it would be
> handy to be able to use a C-like construct like this:
>
>
> #DEFINE NotYet
> ...
> #IFNDEF NotYet
> \book {
>         \bookOutputName "Chez Fernand (alto)"
>         \new Score
> <<
>         \transpose f' d {\TheChords}
>         \new Staff
>         \repeat unfold 13 {
>         s1 \noBreak s1 \noBreak s1 \noBreak s1 \break }
>         \transpose f' d {\TheHead}
> > >
>         \header {piece = "Alto Sax"}
> }
> #ENDIF
What about block comment? I can't see why editing the file to change 
#DEFINE is preferred to editing the file to change the block comment.

%{
\book {
        \bookOutputName "Chez Fernand (alto)"
        \new Score
<<
        \transpose f' d {\TheChords}
        \new Staff
        \repeat unfold 13 {
        s1 \noBreak s1 \noBreak s1 \noBreak s1 \break }
        \transpose f' d {\TheHead}
>>
        \header {piece = "Alto Sax"}
 }
%}

Helge