Re: stupid substitution

[Graham Percival]

Nicolas Sceaux wrote:
> Mats is right. But just for the record: music functions with no argument
> still have their use, for instance:
>
> displayBarNum =
> #(define-music-function (parser location) ()
>    (if (eq? #t (ly:get-option display-bar-numbers))
>        #{ \once \override Score.BarNumber #'break-visibility = ##f #}
>        #{#}))
>
> Then, having used \displayBarNum inside the score, the actual displaying
> of bar numbers is triggered by a command line option:
>
>   lilypond -d display-bar-numbers foo.ly

Thanks, added to git.

Cheers,
- Graham