[Lilypond-auto] [LilyIssues-auto] [testlilyissues:issues] #5378 Temporary staff not ending

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• status: New --> Accepted
• Comment:

See also [#5499].

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[issues:#5378] Temporary staff not ending

Status: Accepted
Created: Fri Jul 13, 2018 02:51 PM UTC by Palmer Ralph
Last Updated: Fri Jul 13, 2018 02:51 PM UTC
Owner: nobody

I'm labelling this as Type: Documentation, because that is the quicker fix, I think, even though I think the problem should also be treated as a bug.

Ralph

Urs Liska wrote :

In NR 3.1.3 Nesting music expressions

the following example is given for a temporary staff:

\new Staff {
   \relative {
     r4 g'8 g c4 c8 d |
     e4 r8
     <<
       { f8 c c }
       \new Staff {
         f8 f c
       }
     >>
     r4 |
   }
}

While this looks mostly right it is wrong because the temporary staff
isn't properly ended, which you can see if you add more music:

\new Staff {
   \relative {
     r4 g'8 g c4 c8 d |
     e4 r8
     <<
       { f8 c c }
       \new Staff {
         f8 f c
       }
     >>
     r4 |
     c1
  }
}

If I'm not mistaken this temporary staff is only ended automatically if
the polyphonic section aligns with a barline:

\new Staff {
   \relative {
     r4 g'8 g c4 c8 d |
     e4 r8
     <<
       { f8 c c r4 }
       \new Staff {
         f8 f c s4
       }
     >>
     c2
   }
}

If this behaviour is considered a bug it should be addressed.

Otherwise the documentation should be changed:

a) the cheap solution would be to simply make the example work properly
by aligning it to a full measure
b) the proper solution would be to explain that when the polyphony
doesn't align with a bar the temporary staff has to be stopped
explicitly with \stopStaff.

The same is true for the second example in that section.

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