3 #(defmacro-public def-music-function (args signature . body)
4 "Helper macro for `ly:make-music-function'.
6 (def-music-function (location arg1 arg2 ...) (arg1-type? arg2-type? ...)
9 `(ly:make-music-function (list ,@signature)
13 applymusic = #(def-music-function (location func music) (procedure? ly:music?)
16 addlyrics = #(def-music-function (location music lyrics) (ly:music? ly:music?)
17 (make-music 'LyricCombineMusic
19 'elements (list music lyrics)))
21 #(defmacro def-grace-function (start stop)
22 `(def-music-function (location music) (ly:music?)
23 (make-music 'GraceMusic
25 'element (make-music 'SequentialMusic
26 'elements (list (ly:music-deep-copy ,start)
28 (ly:music-deep-copy ,stop))))))
29 grace = #(def-grace-function startGraceMusic stopGraceMusic)
30 acciaccatura = #(def-grace-function startAcciaccaturaMusic stopAcciaccaturaMusic)
31 appoggiatura = #(def-grace-function startAppoggiaturaMusic stopAppoggiaturaMusic)
33 partcombine = #(def-music-function (location part1 part2) (ly:music? ly:music?)
34 (make-part-combine-music (list part1 part2)))
36 autochange = #(def-music-function (location music) (ly:music?)
37 (make-autochange-music music))
39 applycontext = #(def-music-function (location proc) (procedure?)
40 (make-music 'ApplyContext
44 applyoutput = #(def-music-function (location proc) (procedure?)
45 (make-music 'ApplyOutputEvent
49 breathe = #(def-music-function (location) ()
50 (make-music 'EventChord
52 'elements (list (make-music 'BreathingSignEvent))))
54 %% \mytag #'foo { ... } ==> OK
55 %% c-\mytag #'foo ^4 ==> KO
57 #(use-modules (srfi srfi-1))
58 #(define-public (symbol-or-symbols? obj)
59 "Return #t iif obj is a symbol or a symbol list."
62 (null? (remove symbol? obj)))))
64 mytag = #(def-music-function (location tagname music) (symbol-or-symbols? ly:music?)
65 (set! (ly:music-property music 'tags)
66 ((if (list? tagname) append cons) tagname (ly:music-property music 'tags)))
74 remove these from the parser, and softcode here:
78 with small syntax changes, we could also do