Hi Trevor!
Le dimanche 14 décembre 2008 à 12:42 -0600, Trevor Bača a écrit :
> Is there a way to print out the name (or other identity) of the
> currently active voice just before any given note or rest in an input
> file?
> Does something like this exist?
I haven't found such a function in Lily sources and docs, try these two
music functions (freely inspired from barNumberCheck definition):
whichContext = #(define-music-function (parser location) ()
(make-music 'ApplyContext
'origin location
'procedure (
lambda (c)
(display
(string-append
"\nCurrent voice is "
(ly:context-id c)
"\n")))))
locationWhichContext = #(define-music-function (parser location) ()
(make-music 'ApplyContext
'origin location
'procedure (
lambda (c)
(display
(ly:input-message location
"current voice is ~a"
(ly:context-id c))))))
It's also possible to make Scheme avatars of these functions, but then
they would need to take the location as an argument.
This should be added to the docs IMHO; should this be added in LSR, the
manual or the (yet to be written) docstring of applyContext?
> [The motivation is that I'm researching the way that LilyPond
> determines which voice music events are assigned to ... from a user's
> perspective based solely on looking at input files. Voice-resolution
> in the example above is of course quite clear; voice-resolution when
> there are multiple anonymous voices, possibly in parallel, has become
> extremely tricky as I've written more and more test files, all of
> which I'll be happy to post if anyone else is interested in that sort
> of thing.]
Please do :-) I guess some of these tests may be added to LSR.
Hope this helps,
John
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