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

[Patrick Karl]

> 
> Message: 1
> Date: Sun, 19 Feb 2012 09:58:23 +0100
> From: Helge Kruse <address@hidden>
> To: address@hidden
> Subject: Re: Is there an equivalent of #define ... #ifndef ... #endif
>       in      lilypond?
> Message-ID: <address@hidden>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
> 
> 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

What would you do if the block to be commented out already contained block 
comments?