James E. Bailey wrote Wednesday, January 07, 2009 10:28 AM
Am 07.01.2009 um 11:06 schrieb Graham Percival:
On Tue, Jan 06, 2009 at 10:18:02PM +0100, James E. Bailey wrote:
Thanks. I remember seeing that in the choral template, but I never
understood that contexts "die" after they're no longer in use. That
explains a lot.
Can I request to the doc team that this be made a bit more
explicit in
the documentation section on contexts?
Yes and no. If you say "could you make this a bit more clear",
then we're going to get pissed off. If you say "I think the docs
would be more clear if you added a paragraph saying `blah blah
foo' and deleted the sentence that says `to blah blah, you should
bar'", then we'll love you forever.
Okay, then how about what Mats said, since I don't understand it
well enough to explain it any better.
"You may have to make sure that the same context survives.
If you do, say,
\new Staff { \new Voice = AAA {c d e f } \new Voice = BBB {g a b c }
\context Voice = AAA { c1 }
}
the two "AAA" Voices will not be the same context, since the
first one dies after the f. Therefore, any lyrics associated with
the first measure will not continue to be associated with the
third measure."
I finally got around to looking at this, but it turns out
to be not as simple as it might seem.
In Mats' example, voice AAA does *not*, in fact, die, but voice
BBB does, as the following shows:
\new Staff {
\new Voice = AAA {
\voiceOneStyle
c d e f
}
\new Voice = BBB {
\voiceTwoStyle
g a b c
}
\context Voice = AAA { c1 }
\context Voice = BBB { c1 }
\context Voice = AAA { c1 }
}
It seems that one voice context in a staff persists in
this way, but the rest die as soon as they have
nothing to do. Clearly I can't use an example in the
docs of a voice dying when in fact that example demonstrates
the contrary! It is easy enough to find an example which
does demonstrate the death of contexts, but I have not yet found a
way of predicting which voice will persist in all circumstances.
I'll raise a discussion on this in -devel
to see if this is intended, an accidental effect or a bug.
In the meantime I'll document how to keep contexts alive.
Trevor