[Lilypond-auto] Issue 2859 in lilypond: Patch: Provide \hide and \omit functions for transparent and void glyphs

[lilypond]

Status: New
Owner: ----
Labels: Type-Enhancement Patch-new

New issue 2859 by address@hidden: Patch: Provide \hide and \omit functions for  
transparent and void glyphs
http://code.google.com/p/lilypond/issues/detail?id=2859

Provide \hide and \omit functions for transparent and void glyphs

Both functions take either a grob name to override, or a music
expression to tweak (that is, the type of the argument decides whether
this results in an override or a tweak).

\hide sets #'transparent for the affected grob to ##t,
\omit sets #'stencil for the affected grob to ##f.

Example uses are
\new Voice \with { \omit StringNumber } { c'\4 }
{ <c' \hide g'~> g' }

Add string-or-music? predicate

http://codereview.appspot.com/6575048