>> why are variable assignments not allowed in \bookpart? [...]
>
> Well, as far as I can see, assignments are also not allowed in
> books.
Hmm...
> And the reason mostly would be that books and bookparts don't have
> scope of their own (apart from book's \paper block). So even if it
> were allowed, it would end up just the same as a global assignment
> outside of the book/bookpart.
OK. Even if \book and \bookpart don't provide `real' grouping (in the
lilypond sense), they contain data between `{' and `}' – let's call
this visual grouping. I consider it quite natural to put stuff into
`\bookmark { ... } ' to indicate that it belongs together.
> Do you have a particular use case in mind?
Yes. I have the following structure for a collection of piano pieces
file-a.ly: left = ...
right = ...
file-b.ly: left = ...
right = ...
...
and I would like to organize it as follows.
\bookpart {
\include "file-a.ly"
\score { ... }
}
\bookpart {
\include "file-b.ly"
\score { ... }
}
...
Right now, I have to do this:
\include "file-a.ly"
\bookpart {
\score { ... }
}
\include "file-b.ly"
\bookpart {
\score { ... }
}
...
Werner
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