Re: Many staff contexts do not nest

[Richard Shann]

On Mon, 2014-08-04 at 08:40 -0700, tisimst wrote:
> On Mon, Aug 4, 2014 at 9:26 AM, David Kastrup [via Lilypond] <[hidden
> email]> wrote:
> > Richard Shann <[hidden email]> writes: 
> > 
> > > The documentation says that staff groups can be nested, but many
> > don't 
> > > appear to work, e.g. this 
> > > 
> > > \version "2.18.0" 
> > > \score { 
> > >         << 
> > >              \new GrandStaff << 
> > >                                 \new Staff { s1*4/4 } 
> > >                                  \new ChoirStaff << 
> > >                                                     \new Staff 
> > > { s1*4/4 } 
> > >                                                     \new Staff 
> > > { s1*4/4 } 
> > >                                                     \new Staff 
> > > { s1*4/4 } 
> > >                                                 >> 
> > >                              >> 
> > >         >> 
> > >     } 
> > > 
> > > has no GrandStaff. 
> > > Is something missing at 
> > >
> > http://www.lilypond.org/doc/v2.18/Documentation/notation/displaying-staves
> > > and can anyone explain the rules (I am trying to write a staff
> > braces 
> > > checker ...)
> > #(for-each 
> >   (lambda (cd) 
> >    (format #t "~a can accept: ~{~a~^, ~}\n" (car cd) 
> >     (or (ly:context-def-lookup (cdr cd) 'accepts)))) 
> >   (ly:output-find-context-def #{ \layout { } #})) 
> > 
> > -- 
> > David Kastrup 
> > 
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> > 
> > 
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> 
> 
> David,
> 
> 
> Nice solution!
> 
> Richard,
> 
> 
> If you'd like to know what the default nesting hierarchy is, you can
> refer to "engraver-init.ly", which shows this heirarchy of the
> different contexts that support nesting (recursion removed for
> simplicity):
> 
> 
> Score accepts...
> |- GrandStaff
> |
> |- StaffGroup accepts...
> |   |- GrandStaff
> |   |- PianoStaff
> |   |- ChoirStaff
> |   |- StaffGroup
> |
> |- ChoirStaff accepts...
>     |- GrandStaff
>     |- PianoStaff
>     |- StaffGroup
> 
> 

Perhaps the following could be added to the Nested Staff Groups section
of the page
http://www.lilypond.org/doc/v2.18/Documentation/notation/displaying-staves

"By default Piano Staff, Grand Staff and Staff Group can be nested
inside a Choir Staff and any of these can be nested inside a Staff
Group."
perhaps immediately before the sentence "New nested staff group contexts
can be defined."
Thanks for the clarifications, I see what I can reasonably check now.

Richard