lilypond-orchestra-template/include/openlilylib/edition-engraver/usage-examples/development-3.ly

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% This file is part of openLilyLib,                                           %
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% the community library project for GNU LilyPond                              %
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% Library: edition-engraver                                                   %
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% edition-engraver is maintained by Jan-Peter Voigt, jp.voigt@gmx.de          %
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%       Copyright Jan-Peter Voigt, Urs Liska, 2017                            %
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\version "2.19.37"

\include "oll-core/package.ily"
\loadPackage edition-engraver

\consistToContexts #edition-engraver Score.Staff.Voice.Lyrics

#(define (my-wild-card v) (eq? #\l (string-ref (format "~A" v) 0)))

\addEdition test

% path-elements surrounded by '<' and '>' denote a procedure
\editionMod test 1 5/4 "<my-wild-card>".Voice \once \override NoteHead.color = #green
% path elements enclosed in '/' are regular expressions
\editionMod test 2 2/4 "/^.[eu].*$/".Voice \once \override NoteHead.color = #red
\editionMod test 2 3/4 "/^[fl][au]$/".Voice \once \override NoteHead.color = #'(0.8 0.5 0.8)
% path elements enclosed in curly brackets are wildcards
\editionMod test 3 2/4 "{l*}".Voice \once \override NoteHead.color = #blue
\editionMod test 3 3/4 "{*a}".Voice \once \override NoteHead.color = #'(0.5 0.5 1)
\editionMod test 3 3/4 "{*u}".Voice \once \override NoteHead.color = #'(1 0.5 0.5)

<<
  \new Staff \with {
    \editionID la
  } \repeat unfold 3 \relative { c''4 b bes a }
  \new Staff \with {
    \editionID le
  } \repeat unfold 3 \relative { c''4 b bes a }
  \new Staff \with {
    \editionID fu
  } \repeat unfold 3 \relative { c''4 b bes a }
>>