Le mardi 08 août 2023 à 19:53 +0200, Lukas-Fabian Moser a écrit : > Yes, sure, that's what I did in my code for Alasdair. But I was more > wondering whether or not RhythmicStaves (RhythmicStaff's?) should do > this automatically. > > By the way, I didn't know about music-clone. What's its advantage over > ly:music-deep-copy?
As far as I understand the docstring, (music-clone mus 'elements new-elts) is more efficient than (let ((new-mus (ly:music-deep-copy mus))) (ly:music-set-property! new-mus 'elements new-elts) new-mus) because it will avoid deeply copying the elements list and all its elements, by noticing that it will be overridden by new-elts anyway. Without extra arguments, (music-clone m) should be strictly equivalent to (ly:music-deep-copy m).
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