Adds octavation-eight-interface to the Beam_collision_engraver

scm/define-grob-interfaces.scm

 ;;;; This file is part of LilyPond, the GNU music typesetter.
 ;;;;
 ;;;; Copyright (C) 1998--2012  Han-Wen Nienhuys <hanwen@xs4all.nl>
 ;;;;                 Jan Nieuwenhuizen <janneke@gnu.org>
 ;;;;
 ;;;; LilyPond is free software: you can redistribute it and/or modify
 ;;;; it under the terms of the GNU General Public License as published by
 ;;;; the Free Software Foundation, either version 3 of the License, or
 ;;;; (at your option) any later version.
 ;;;;
@@ skipping 198 matching lines @@
  'multi-measure-interface
  "Multi measure rest, and the text or number that is printed over it."
  '(bound-padding))
 
 (ly:add-interface
  'note-name-interface
  "Note names."
  '())
 
 (ly:add-interface
+ 'octavate-eight-interface
+  "Interface that permits the nominal identification of the octavian
+annotation that multiplies by two the freqency of the pitches present
+in a given staff were they played on a clef that lacked said octavian
+annotation."

[dak, 2012/08/29 14:13:47]

What about \clef "bass_8" or \clef "treble_15" ?

[janek, 2012/08/30 08:37:12]

I don't quite understand what this description means.  Reword please?

+  '())
+
+(ly:add-interface
  'only-prebreak-interface
  "Kill this grob after the line breaking process."
  '())
 
 (ly:add-interface
  'parentheses-interface
  "Parentheses for other objects."
  '(padding stencils))
 
 (ly:add-interface
@@ skipping 73 matching lines @@
 (ly:add-interface
  'unbreakable-spanner-interface
  "A spanner that should not be broken across line breaks.  Override
 with @code{breakable=##t}."
  '(breakable))
 
 (ly:add-interface
  'volta-interface
  "A volta repeat."
  '())