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Quoting \set and \override (for cue notes etc.)

From: Reinhold Kainhofer
Subject: Quoting \set and \override (for cue notes etc.)
Date: Fri, 14 Aug 2009 19:30:34 +0200
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Some time ago we had this discussion that \overrides are not quoted from the 
original music when you use \cueDuring or \quoteDuring.

Unfortunately, this also means that accacciaturas will be quoted wrong, since 
the slash through the note will not be quoted (so singers will usually read 
the quoted grace as taking half the duration of the following note instead of 
being as short as possible).

And the fact that \set commands are not quoted means that the beaming of vocal 
cue voices can be wrong, since the auto-beaming is not turned off (see also the 
attached file).

I tried debugging this issue, by looking at ly:make-event-class (which is 
called by internal_in_event_class, which is called in the Quote_iterator), but 
it seems that e.g. SetProperty is also a StreamEvent, so setting 
quotedEventTypes=#'(StreamEvent) should quote 
\set, too...

So, can anyone help me figure out which music classes to allow to also quote 
\override and \set commands? In particular, the music expression look like:

(make-music 'OverrideProperty ...)
(make-music 'RevertProperty ...)
(make-music 'PropertySet ...)
(make-music 'PropertyUnset ...)

In the expression tree, they are inside a ContextSpeccedMusic expression:
(make-music 'ContextSpeccedMusic
      'context-type 'Bottom
      'element (list ...))

However, the problem has nothing to do with the ContextSpeccedMusic, since 
other events inside ContextSpeccedMusic are quoted.

I tried adding various classes to the quotedEventTypes list, e.g. override-
property-event general-music override-property OverrideProperty property-set 
PropertySet, but nothing seems to have any effect. Any idea how to make 
lilypond also quote overrides and \set commands?

Reinhold Kainhofer, address@hidden,
 * Financial & Actuarial Math., Vienna Univ. of Technology, Austria
 *, DVR: 0005886
 * LilyPond, Music typesetting,

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