Re: Conditional ambitus

[Thomas Morley]

2013/1/26 David Kastrup <address@hidden>:
> Kevin Stolt <address@hidden> writes:
>
>> Hi,
>> I'm trying to conditionally add ambitus based on a variable
>> definition.  I'm
>> having trouble figure out how to do it.
>>
>> \version "2.16.2"
>> isAmbitus = #f
>> includeAmbitus = #(define-music-function
>>   (parser location)
>>   ()
>>   (if isAmbitus
>>   #{ \with { \consists "Ambitus_engraver" } #}
>>   #{ #} ))
>>
>> %When I try to use includeAmbitus:
>> \score {
>> \new Voice = "one" \includeAmbitus {e' f' g'}
>> }
>>
>>
>>
>> It gives an error about an unexpected EVENT_IDENTIFIER
>> Is this there a different function type I should be using
>> instead of define-music-function?
>
> define-scheme-function.  The second case will need to contain
> #{ \with { } #}
> in order to make it a context mod as well rather than a void music
> expression.
>
> Maybe you'll need \with \includeAmbitus to have it work properly.
>
> --
> David Kastrup
>
>
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> lilypond-user mailing list
> address@hidden
> https://lists.gnu.org/mailman/listinfo/lilypond-user

Why use a function at all?

\version "2.16.2"

isAmbitus = ##f

#(define includeAmbitus
  (if isAmbitus
      #{ \with { \consists "Ambitus_engraver" } #}
      #{ \with {  } #}))

\score {
\new Voice = "one" \includeAmbitus {e' f' g'}
}

Seems to work.

-Harm