Re: Creating score with unfolded repeats in scheme

[Morten Lemvigh]

Hi David,

Thank you for the swift and precise response. That was exactly it. When I am in search of new functionality, I usually search this page for keywords:
https://lilypond.org/doc/v2.23/Documentation/internals/scheme-functions

That was how I found the ly:make-score. Is there some way of deducing if a function is intended to be called directly or is only an internal utility function?

Best regards,

Morten

On Mon, Sep 9, 2024 at 11:28 PM David Kastrup <dak@gnu.org> wrote:

Morten Lemvigh <morten.lemvigh@gmail.com> writes:

> So the question is: what have I misunderstood? :-)
>
> Best regards,
> Morten
>
> \version "2.24.2"
>
> choirScore = \score {
>     \new Staff {
>         \relative c' {
>             \repeat volta 2 {
>                 c d e f
>             }
>         }
>     }
> }
>
> make-rehearsal =
> #(define-scheme-function
>   (the-score)
>   (ly:score?)
>   (ly:make-score (unfold-repeats-fully (ly:score-music the-score))))
>
> new-score = #(make-rehearsal choirScore)
> \new-score

If you define the function with define-scheme-function instead of
#(define ...), why not call it as

new-score = \make-rehearsal \choirScore

?  That's just a detail.  The main problem is that ly:make-score is an
internal function that does not do the full required job of creating a
score from unprepared music.

To get the full preparation necessary, use scorify-music instead of
ly:make-music .  It uses ly:make-music internally but does other
required things.

--
David Kastrup