Snippet

[Martín Rincón Botero]

Hello,

I have this snippet that combines subsequent multimeasure rests into a multiplied one that Lilypond can compress, that I grabbed from somewhere a while ago. It used to work without errors, if I remember well, in Lilypond 2.20. In 2.22.1 it still "works" but throws an error for the first line of the snippet, namely:

syntax error, unexpected SYMBOL, expecting '.' or '='

​#(define (append-merge x l r)

It seems that something changed in 2.22 that makes the snippet misbehave. Here's the snippet:

#(define (append-merge x l r)

"Add x to the head of list l, merging skips,

and if r is true also merging full measure rests."

  (if (and (pair? l)

           (ly:music? x)

           (ly:music? (car l))

           (or (and (music-is-of-type? x 'skip-event)

                    (music-is-of-type? (car l) 'skip-event))

               (and r

                    (music-is-of-type? x 'multi-measure-rest)

                    (music-is-of-type? (car l) 'multi-measure-rest)))

           (not (pair? (ly:music-property (car l) 'articulations))))

     (let ((total

            (ly:moment-add

            (ly:music-duration-length (car l))

            (ly:music-duration-length x)

            )))

       (set! (ly:music-property x 'duration)

              (make-duration-of-length total))

       (cons x (cdr l)))

    (cons x l)))

​

mergeSkips = #(define-music-function

 (parser location rests-also music) ((boolean?) ly:music?)

 "Merge successive skips in sequential music,

  optionally merge full-measure rests as well."

 (music-map

   (lambda (m)

      (if (music-is-of-type? m 'sequential-music)

        (ly:music-set-property! m

           'elements

           (fold-right (lambda (x l)

                         (append-merge x l rests-also))

             '()

             (ly:music-property m 'elements))))

     m)

   music))

  

mergeFullBarRests = #(define-music-function

 (parser location music) (ly:music?)

 #{ \mergeSkips ##t $music #})

​

\score {

  \mergeFullBarRests {

\context Staff = "staff1" {

  \compressEmptyMeasures

  c1 R1 R1 R1

}

  }

  }

Would it be possible to update it to work on Lilypond 2.22.1?

Regards,

Martín.