2012/11/5 Vivian Barty-Taylor <[email protected]>:
> Could someone with knowhow help me to debug this music function? I want a
> function to create arrows in a Lilypond score:
>
> arrow = #(define-music-function (parser location arg1 ) ( pair?)
> #{
>
> \markup { \line \draw-line #arg1 \arrow-head #X #RIGHT ##t }}
>
> #})
>
> When I process:
>
> \version "2.16.0"
>
> \include "header.ly"
>
>
> \score {
>
> \new Staff {
>
> c4_\arrow #'(10 . 0)
>
> }
> }
>
> I get output:
>
> Ontleden...
> arrowtest.ly:10:3: fout: music function cannot return (#<procedure
> line-markup (layout props args)> ((#<procedure draw-line-markup (layout props
> dest)> (10 . 0)) (#<procedure arrow-head-markup (layout props axis dir
> filled)> 0 1 #t)))
> c4_
> \arrow #'(10 . 0)
> Interpreting music...
> programmeerfout: Not a music type
>
> Thanks in advance,
>
> Vivian.
>
>
>
> _______________________________________________
> lilypond-user mailing list
> [email protected]
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Hi,
you could try:
\version "2.16.0"
arrow = #(define-music-function (parser location arg1) ( pair?)
(make-music
'TextScriptEvent
'text
#{ \markup \line { \draw-line #arg1 \arrow-head #X #RIGHT ##t } #} ))
\new Staff { c4-\arrow #'(10 . 0) }
But see:
http://code.google.com/p/lilypond/issues/detail?id=2949
by David Kastrup
(5 minutes ago)
Cheers,
Harm
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