Re: [Lilypond-auto] Issue 3560 in lilypond: Completion_heads_engraver with \scaleDurations

[lilypond]

Comment #30 on issue 3560 by address@hidden: Completion_heads_engraver with  
\scaleDurations
http://code.google.com/p/lilypond/issues/detail?id=3560

I would not want to mess with the parser _and_ the duration data type here:  
that would affect pretty much _all_ current handling of durations: far too  
big a can of worms just for placating the completion engravers.

If one wanted more automatisms, \scaleDurations/\tuplet would trigger some  
events or have iterators change some context properties that the completion  
engravers use for figuring out the "neutral" multiplication factor.

I don't think that the completion engravers warrant even this complexity.   
It's possible that my scheme is to complex, and that we just need a  
three-way switch, "smart", "long", "scaled".  But since that is a subset of  
my proposal, one can possibly emphasize the respective settings in the  
documentation string.

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