Hi everyone! According to this page in the manual <http://lilypond.org/doc/v2.19/Documentation/usage/writing-code-to-support-multiple-versions> the function ly:version? should be implemented, but the example given fails with the error 'unbound variable: ly:version?' which suggests it's not. I'm running it in 2.19.83, was this function deleted and the documentation not updated?
Copying the example here: #(cond ((ly:version? > '(2 20)) (ly:message "This is code to run for LilyPond after 2.20")) ((ly:version? = '(2 19 57)) (ly:message "This will only be executed with LilyPond 2.19.57")) (else (ly:message "This will be executed in any other version"))) Does anyone know what is happening? Thanks you!
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