Re: Doc: NR Clarify finer point of repeat unfold (issue 5075047)

[Janek Warchoł]

2011/9/21 David Kastrup <address@hidden>:
> address@hidden writes:
>
>> LGTM.
>>
>> From what i see, the surprise in this behaviour comes from two meanings
>> of "music expression" - it can be understood as "a piece of ly input" or
>> "a piece of music".  Shall we write a sentence about this difference?
>> I.e. "Using \repeat unfold is equal to writing out a fragment of music
>> several times over, not a fragments of ly input"?
>
> If you write
>
> blurb = { c e g a }
>
> { \blurb \relative c'' \blurb }
>
> is \blurb a fragment of music, or a fragment of ly input?  I am afraid
> it is both: relativable music is a weird thing.
>
> And
> \relative c' { \blurb \blurb }
> is different from
> \relative c' \repeat unfold 2 \blurb
>
> The reason that it is different is not that one is "ly input" and the
> other is "music", but that making \repeat unfold do something different
> from \repeat volta would be a total nuisance, and so we _explicitly_
> programmed this case to behave differently.

Good point, you are right that it was nonsense.

cheers,
Janek