I’m trying to write a music function in scheme in which the first argument is
optional and have run into something that confuses me:
The following works:
\version "2.19.84"
recite = #(define-music-function (times note) ((integer? 1) ly:music?)
#{ \repeat unfold #times { #note }
#})
\new Staff {
\new Voice { g' \recite g' g' }
}
However, when I swap integer? for positive? (to reflect the fact that only a
positive integer should be acceptable) it breaks, telling me the argument at
position 1 is of the wrong type (it’s music, not a positive number). Why
doesn’t scheme’s handling of optional arguments work when using the positive?
predicate?
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Fr. Samuel, OSB
(R. Padraic Springuel)
St. Anselm’s Abbey
4501 South Dakota Ave, NE
Washington, DC, 20017
202-269-2300
(c) 202-853-7036
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