Re: Percent repeats in lyrics causes error in 2.18.2

[Thomas Morley]

Am Mi., 8. Mai 2019 um 01:11 Uhr schrieb David Kastrup <address@hidden>:
>
> Thomas Morley <address@hidden> writes:
>
> > Am Mi., 8. Mai 2019 um 00:25 Uhr schrieb David Kastrup <address@hidden>:
> >>
> >> Thomas Morley <address@hidden> writes:
> >
> >> > I tried a quick adhoc coding.
> >> >
> >> > Works with \unfoldRepeats, regrettable prints nothing without it.
> >> > I'd expect to see it at least one time printed without \unfoldRepeats.
> >> >
> >> > Anyway, here my coding so far, what do I miss?
> >>
> >> An iterator creator ?
> >
> > I've exactly zero experience with this topic.
> >
> > I tried to get some more info, we have:
> > http://lilypond.org/doc/v2.19/Documentation/contributor-big-page.html#iterator-tutorial
> >
> > Which reads:
> > "
> > 10.10 Iterator tutorial
> > TODO – this is a placeholder for a tutorial on iterators
> > Iterators are routines written in C++ that process music expressions
> > and sent the music events to the appropriate engravers and/or
> > performers.
> > See a short example discussing iterators and their duties in
> > Articulations on EventChord.
> > "
> > Not that enlightening... Admittedly there a some more hints spread over CG.
> > Though, right now I'm not even sure, if it's possible in scheme at all.
> >
> > Is there any scheme-example?
>
> In scm/define-music-types.scm I read
>
>     (RepeatedMusic
>      . ((description . "Repeat music in different ways.")
>         (types . (repeated-music))
>         ))
>
> so it would appear that the default iterator should actually work as
> intended if you fill the expression in the usual way (element containing
> the main stuff, elements containing the alternatives).

Not sure, if this is the case yet.
I'll check tomorrow evening (hopefully)
Too late ...

Good night and thanks,
  Harm

> Unless
> RepeatedMusic is not actually being used.  No idea.
>
> --
> David Kastrup