Hi David,
(More concretely, in our use case, \myFunction expected "a chord or a
duration". This leads to a behaviour where
a2 \myFunction 4
does not change the "current duration", but
a2 \myFunction <a c>4
does.)
So let it expect a music expression only. 4 is a pitchless note event.
Thanks for the tip! This actually works in "normal" note entry mode, but
it doesn't in our case, since our function is (at the current point of
time) to be used in \figuremode, and here, the parser seems not to be
willing to interpret 4 as ly:music?.
The problem is that in reality (sorry that I didn't mention this) our
function is supposed to be given
- either a bass figure (e.g. <6 4> or <6 5>8)
- or just a duration.
This works with a predicate of the form (or (ly:music? x) (ly:duration?
x)), but then the duration is not taken as the next default_duration.
I'm not aware of any way let a music function accept a bass figure
without explicit \figuremode - and I'd very much prefer to write this
_once_ (at the outside), and not in every function call (at the inside).
Interestingly,
zing =
#(define-void-function (x) (ly:music?)
#f)
\fixed c' { c1 \zing c4 c \zing 2 c c }
does not actually work. But that arguably is a bug that should get
fixed. If a duration is accepted as a note, it should affect the
default note duration.
Yes, probably. If I'm informed correctly I should not try to open an
issue myself, but send a mail the bug list?
Lukas
