Re: Staff switch line (documentation?) bug

[Mats Bengtsson]

You can check the definition of the \showStaffSwitch macro
yourself if you look in the file
/usr/share/lilypond/2.4.2/ly/property-init.ly
(or wherever LilyPond is installed on your machine).

It seems that the manual is wrong and that the property should only
be set in the current Voice context.

   /Mats

Yuval Harel wrote:
> Hi,
>
> I noticed that in some situations \showStaffSwitch works where {\set  
> PianoStaff.followVoice = ##t}
> produces seemingly-buggy results. Are they expected to produce the same  
> behavior?
> The documentation  
> (http://lilypond.org/doc/v2.5/Documentation/user/out-www/lilypond/Staff-switch-lines.html)  
> appears to hint they are the same (though this is not written 
> explicitly)  and shows an example using {\set PianoStaff.followVoice = 
> ##t}, which as  far as I can see, is not usable.
>
> The following example demonstrates the issue: in addition to the 
> expected  staff-switch line, a
> redundant one is produced is the right hand staff, although that voice  
> does not cross staves.
> Using \showStaffSwitch instead of {\set PianoStaff.followVoice = ##t}  
> produces the expected behavior.
>
> \version "2.4.2"
>
> \new PianoStaff <<
>     \context Staff=RH { c'1 | \voiceOne c'1 }
>     \context Staff=LH {
>         \clef bass
>         c1 |
>         \set PianoStaff.followVoice = ##t
>         \change Staff=RH \voiceTwo
>         c'1
>     }
>
> > >
>
>
> Thanks,
>     Yuval
>
>
>
>
>
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> d

--
=============================================
        Mats Bengtsson
        Signal Processing
        Signals, Sensors and Systems
        Royal Institute of Technology
        SE-100 44  STOCKHOLM
        Sweden
        Phone: (+46) 8 790 8463                         
        Fax:   (+46) 8 790 7260
        Email: address@hidden
        WWW: http://www.s3.kth.se/~mabe
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