Hi,
With lilypond 2.19.3, applying a music function to a bass figure
causes a syntax error. At least until 2.17.24 (I have not tested
later versions), that was not the case.
Example:
\version "2.19.3"
%% Figured bass
%% change a flat or sharp alteration into natural
%% unless 'ancient-style option is true
naturalFig =
#(define-music-function (parser location fig) (ly:music?)
(if (eqv? #t (ly:get-option 'ancient-style))
fig
(music-map
(lambda (music)
(if (eqv? 'BassFigureEvent (ly:music-property music 'name))
(let ((alteration (ly:music-property music 'alteration)))
(if (and (number? alteration)
(or (= alteration 1/2) (= alteration -1/2)))
(set! (ly:music-property music 'alteration) 0))))
music)
fig)))
<<
\new Staff { \clef "bass" c1 }
%% this used to work, but now causes a syntax error:
\figures { \naturalFig <_+> }
%% workaound:
%\figures { \naturalFig { <_+> } }
>>
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