Re: Issue 795 in lilypond: Beams do not take grace notes into account

[lilypond]

Comment #5 on issue 795 by address@hidden: Beams do not take grace notes  
into account
http://code.google.com/p/lilypond/issues/detail?id=795

Hey Colin,

I'm not sure if this is a problem - the stem is just covered by the stem of  
the 8th note.  One can imagine that if the regtest had set the 8th notes  
lower, the quarter note stem would be subsumed into the 8th note stem.  ie:

quoteMe = \relative c' { fis4 r16  a8.-> b4-\ff c }

\addQuote quoteMe \quoteMe
original = \relative c'' { c8 d s2 \stemDown a8 fis8 }

<<
    \new Staff {
        \set Staff.instrumentName = "quoteMe"
        \quoteMe
    }
    \new Staff {
        \set Staff.instrumentName = "orig"
        \original
    }
    \new Staff \relative c'' <<

        \set Staff.instrumentName = "orig+quote"
        \set Staff.quotedEventTypes = #'(note-event articulation-event)
        \original
        { s4 \quoteDuring #"quoteMe" { s2. } }
    >>


I think this addresses a larger issue, however, of being able to turn on  
and off certain grobs in the beam-collision-engraver.  This is doable via a  
modifiable property (ie Beam #'avoid = #'(stem beam note-head clef  
time-signature)), but that seems like it'd be appropriate for a separate  
patch.