Re: [Lilypond-auto] Issue 4131 in lilypond: Patch: Reimplement forced partcombine decisions via context properties

[lilypond]

Comment #15 on issue 4131 by address@hidden: Patch: Reimplement forced  
partcombine decisions via context properties
https://code.google.com/p/lilypond/issues/detail?id=4131

\partcombine is weird in that it takes two music expressions and makes  
voices out of them.  We often need to override its decisions, often when  
only one part is playing,
(https://www.google.com/search?q=partcombineApart+site%3Amutopiaproject.org)
and it is easier to understand if the overrides goes in the part that  
caused the need for an override.

The current system (image above) has the \partcombine music function listen  
for the overrides and keep track of a single overriden state.  I see now  
that the patch (image below) does in fact track two states, and does not  
apply an override in the second part while one is in effect in the first.

If this patch doesn't help anyone, we can just leave things as they are.

\new Staff  \transpose c c' {
  \partcombine
  {\partcombineApart
    e4 e e \partcombineChordsOnce e | e e e e}
  {c4 c \partcombineChords c c      | c c c c } }

\new Staff  \transpose c c' {
  \partcombine
  {\partcombineApart
   e4 e e \once\partcombineChords e | e e e e}
  {c4 c \partcombineChords c c      | c c c c }

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