On 2019-07-11 11:52 pm, Immanuel Litzroth wrote:
This seems to do the wrong thing:
\version "2.19.81"
testme = #(define-music-function
(parser location music)
(ly:music?)
#{
\transpose c c' {#music } {#music }
#})
\testme g'
printing out two g'' instead of a g'' and a g'
Consider using $music or ly:music-deep-copy:
%%%%
\version "2.19.83"
testI = #(define-music-function (music) (ly:music?)
#{ \transpose c c' $music $music #})
testII = #(define-music-function (music) (ly:music?)
#{ \transpose c c' #(ly:music-deep-copy music) #music #})
\testI d' \testII e'
%%%%
Also I found it strange that {#music} is not accepted as an argument
with
the
following error:
tmp.ly:6:16: error: GUILE signaled an error for the expression
beginning
here
{#
music}
Unbound variable: music}
It seems to parse the closing } as part of the variable name.
Scheme is pretty permissive with what can be part of a symbol, so this
is one case where whitespace does matter.
-- Aaron Hill
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