2017-05-02 8:29 GMT+02:00 Urs Liska <address@hidden>:
Hi all,
I'm trying to apply event functions to music passed into a music function
like that:
\version "2.19.57"
test =
#(define-music-function (mus)(ly:music?)
#{
#mus \startGroup
#})
{
\test c' d' e' f' \stopGroup
}
(of course this is not what I ultimately want to achieve, but the nucleus
from which I'll be able to continue on my own).
This fails with "error: syntax error, unexpected EVENT_IDENTIFIER". I think
it is because the #mus expression is somehow already complete (differently
from when used in regular input) and I have to somehow *apply* the
\startGroup event function to the #mus argument.
From \displayMusic I can see that it is added as a NoteGroupingEvent to the
note's articulations, but I'd like to ask if there's a more straightforward
way to attach the event to the music than rebuilding the music expression in
Scheme.
OTOH I will want to do that for the first *and last* element in a music
expression (in order to apply the start and stop command to a sequence of
notes), so I may *have* to extract the Scheme representation anyway?
TIA
Urs
\layout {
\context {
\Voice
\consists "Horizontal_bracket_engraver"
}
}
test =
#(define-music-function (mus)(ly:music?)
#{
<>\startGroup
$mus
<>\stopGroup
#})
{
\test { c' d' e' f' }
}
Should do the trick.
Cheers,
Harm
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