Re: stem-shorten can't be reverted

[Rune Zedeler]

Werner LEMBERG wrote:

> Thanks.  Please explain to me why your solution works and mine
>
> < a \\
> \property Voice.Stem \override #'stem-shorten = #'(2 2)
>        e
> \property Voice.Stem \revert #'stem-shorten
>           >
>
> fails.  I think I miss something regarding grouping.

The problem is that before lilypond starts doing anything else it sorts 
  all requests by time.
This allows for < {foo bar} {baz jazz} > and { <foo baz> <bar jazz> } to 
mean the same things.
In your examples the two requests happen on the same time (because they 
are in the same simultainonus group} and on each time slot lilypond 
performs all requests befor it performs the notes. Hence the setting 
will be both overridden AND reverted before the note occurs.

-Rune