1 %%%% -*- Mode: Scheme -*-
3 %%%% This file is part of LilyPond, the GNU music typesetter.
5 %%%% Copyright (C) 2003--2012 Han-Wen Nienhuys <hanwen@xs4all.nl>
6 %%%% Jan Nieuwenhuizen <janneke@gnu.org>
8 %%%% LilyPond is free software: you can redistribute it and/or modify
9 %%%% it under the terms of the GNU General Public License as published by
10 %%%% the Free Software Foundation, either version 3 of the License, or
11 %%%% (at your option) any later version.
13 %%%% LilyPond is distributed in the hope that it will be useful,
14 %%%% but WITHOUT ANY WARRANTY; without even the implied warranty of
15 %%%% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 %%%% GNU General Public License for more details.
18 %%%% You should have received a copy of the GNU General Public License
19 %%%% along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
24 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
25 %% this file is alphabetically sorted.
26 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
28 %% need SRFI-1 for filter; optargs for lambda*
29 #(use-modules (srfi srfi-1)
32 %% TODO: using define-music-function in a .scm causes crash.
35 #(define-music-function (parser location music)
37 (_i "Make @var{music} absolute. This does not actually change the
38 music itself but rather hides it from surrounding @code{\\relative}
40 (make-music 'RelativeOctaveMusic 'element music))
43 #(def-grace-function startAcciaccaturaMusic stopAcciaccaturaMusic
44 (_i "Create an acciaccatura from the following music expression"))
46 %% keep these two together
47 instrument-definitions = #'()
48 addInstrumentDefinition =
49 #(define-void-function
50 (parser location name lst) (string? list?)
51 (_i "Create instrument @var{name} with properties @var{list}.")
52 (set! instrument-definitions (acons name lst instrument-definitions)))
55 #(define-void-function (parser location name music) (string? ly:music?)
56 (_i "Define @var{music} as a quotable music expression named
58 (add-quotable parser name music))
60 %% keep these two together
61 afterGraceFraction = #(cons 6 8)
63 #(define-music-function (parser location main grace) (ly:music? ly:music?)
64 (_i "Create @var{grace} note(s) after a @var{main} music expression.")
65 (let ((main-length (ly:music-length main))
66 (fraction (ly:parser-lookup parser 'afterGraceFraction)))
67 (make-simultaneous-music
70 (make-sequential-music
73 (make-music 'SkipMusic
74 'duration (ly:make-duration
76 (* (ly:moment-main-numerator main-length)
78 (* (ly:moment-main-denominator main-length)
80 (make-music 'GraceMusic
84 %% music identifiers not allowed at top-level,
85 %% so this is a music-function instead.
87 #(define-music-function (location parser) ()
88 (_i "Allow a page turn. May be used at toplevel (ie between scores or
89 markups), or inside a score.")
90 (make-music 'EventChord
92 'page-turn-permission 'allow
93 'elements (list (make-music 'PageTurnEvent
94 'break-permission 'allow))))
97 #(define-music-function (parser location property arg item)
98 (symbol-list-or-symbol? list? symbol-list-or-music?)
99 (_i "Override @var{property} for pieces of broken spanner @var{item}
100 with values @var{arg}. @var{item} may either be music in the form of
101 a starting spanner event, or a symbol list in the form
102 @samp{Context.Grob} or just @samp{Grob}. Iff @var{item} is in the
103 form of a spanner event, @var{property} may also have the form
104 @samp{Grob.property} for specifying a directed tweak.")
106 (if (eq? (ly:music-property item 'span-direction) START)
107 #{ \tweak #property #(value-for-spanner-piece arg) #item #}
109 (ly:music-warning item (_ "not a spanner"))
111 (let* ((p (check-grob-path item parser location
115 (name (and p (second p)))
117 (and name (assoc-get name all-grob-descriptions))))
119 (member 'spanner-interface
120 (assoc-get 'interfaces
121 (assoc-get 'meta description))))
123 \override #item . #property =
124 #(value-for-spanner-piece arg)
127 (ly:input-warning location (_ "not a spanner name, `~a'") name)
128 (make-music 'Music))))))
131 #(define-music-function (parser location tag more music)
132 (symbol? ly:music? ly:music?)
133 (_i "Append @var{more} to the @code{elements} of all music
134 expressions in @var{music} that are tagged with @var{tag}.")
135 (music-map (lambda (m)
136 (if (memq tag (ly:music-property m 'tags))
137 (set! (ly:music-property m 'elements)
138 (append (ly:music-property m 'elements)
144 #(define-music-function (parser location proc) (procedure?)
145 (_i "Modify context properties with Scheme procedure @var{proc}.")
146 (make-music 'ApplyContext
150 #(define-music-function (parser location func music) (procedure? ly:music?)
151 (_i"Apply procedure @var{func} to @var{music}.")
155 #(define-music-function (parser location ctx proc) (symbol? procedure?)
156 (_i "Apply function @code{proc} to every layout object in context @code{ctx}")
157 (make-music 'ApplyOutputEvent
162 #(def-grace-function startAppoggiaturaMusic stopAppoggiaturaMusic
163 (_i "Create an appoggiatura from @var{music}"))
165 % for regression testing purposes.
167 #(define-music-function (parser location l r) (pair? pair?)
168 (_i "Testing function: check whether the beam quants @var{l} and @var{r} are correct")
169 (make-grob-property-override 'Beam 'positions (check-quant-callbacks l r)))
171 % for regression testing purposes.
173 #(define-music-function (parser location comp) (procedure?)
174 (_i "Testing function: check whether the slope of the beam is the same as @code{comp}")
175 (make-grob-property-override 'Beam 'positions (check-slope-callbacks comp)))
178 #(define-music-function (parser location music) (ly:music?)
179 (_i "Make voices that switch between staves automatically")
180 (make-autochange-music parser music))
185 #(define-music-function (parser location grob-name offset text)
186 (symbol? number-pair? markup?)
187 (_i "Attach @var{text} to @var{grob-name} at offset @var{offset}
188 (use like @code{\\once})")
191 (make-music 'AnnotateOutputEvent
193 'X-offset (car offset)
194 'Y-offset (cdr offset)
198 #(define-event-function (parser location offset text) (number-pair? markup?)
199 (_i "Attach @var{text} at @var{offset} (use like @code{\\tweak})")
200 (make-music 'AnnotateOutputEvent
201 'X-offset (car offset)
202 'Y-offset (cdr offset)
206 #(define-music-function (parser location type) (string?)
207 (_i "Insert a bar line of type @var{type}")
209 (make-property-set 'whichBar type)
213 #(define-music-function (parser location n) (integer?)
214 (_i "Print a warning if the current bar number is not @var{n}.")
215 (make-music 'ApplyContext
218 (let ((cbn (ly:context-property c 'currentBarNumber)))
219 (if (and (number? cbn) (not (= cbn n)))
220 (ly:input-warning location
221 "Barcheck failed got ~a expect ~a"
225 #(define-scheme-function (parser location music) (ly:music?)
226 (_i "Extract a value suitable for setting
227 @code{Timing.beamExceptions} from the given pattern with explicit
228 beams in @var{music}. A bar check @code{|} has to be used between
229 bars of patterns in order to reset the timing.")
230 (extract-beam-exceptions music))
233 #(define-event-function (parser location delta) (real?)
234 (_i "Create a fall or doit of pitch interval @var{delta}.")
235 (make-music 'BendAfterEvent
239 #(define-void-function (parser location newfilename) (string?)
240 (_i "Direct output for the current book block to @var{newfilename}.")
241 (set! (paper-variable parser #f 'output-filename) newfilename))
244 #(define-void-function (parser location newsuffix) (string?)
245 (_i "Set the output filename suffix for the current book block to
247 (set! (paper-variable parser #f 'output-suffix) newsuffix))
249 %% \breathe is defined as a music function rather than an event identifier to
250 %% ensure it gets useful input location information: as an event identifier,
251 %% it would have to be wrapped in an EventChord to prevent it from being
252 %% treated as a post_event by the parser
254 #(define-music-function (parser location) ()
255 (_i "Insert a breath mark.")
256 (make-music 'BreathingEvent))
259 #(define-music-function (parser location type) (string?)
260 (_i "Set the current clef to @var{type}.")
261 (make-clef-set type))
265 #(define-music-function (parser location args) (pair?)
266 (_i "Create compound time signatures. The argument is a Scheme list of
267 lists. Each list describes one fraction, with the last entry being the
268 denominator, while the first entries describe the summands in the
269 enumerator. If the time signature consists of just one fraction,
270 the list can be given directly, i.e. not as a list containing a single list.
271 For example, a time signature of (3+1)/8 + 2/4 would be created as
272 @code{\\compoundMeter #'((3 1 8) (2 4))}, and a time signature of (3+2)/8
273 as @code{\\compoundMeter #'((3 2 8))} or shorter
274 @code{\\compoundMeter #'(3 2 8)}.")
275 (let* ((mlen (calculate-compound-measure-length args))
276 (beat (calculate-compound-base-beat args))
277 (beatGrouping (calculate-compound-beat-grouping args))
278 (timesig (cons (ly:moment-main-numerator mlen)
279 (ly:moment-main-denominator mlen))))
281 \once \override Staff.TimeSignature.stencil = #(lambda (grob)
282 (grob-interpret-markup grob (format-compound-time args)))
283 \set Timing.timeSignatureFraction = #timesig
284 \set Timing.baseMoment = #beat
285 \set Timing.beatStructure = #beatGrouping
286 \set Timing.beamExceptions = #'()
287 \set Timing.measureLength = #mlen
291 #(define-music-function (parser location notes) (ly:music?)
292 (_i "Create cross-staff stems")
294 \temporary \override Stem.cross-staff = #cross-staff-connect
295 \temporary \override Flag.style = #'no-flag
297 \revert Stem.cross-staff
302 #(define-music-function (parser location type) (string?)
303 (_i "Set the current cue clef to @var{type}.")
304 (make-cue-clef-set type))
307 #(define-music-function (parser location) ()
308 (_i "Unset the current cue clef.")
309 (make-cue-clef-unset))
312 #(define-music-function
313 (parser location what dir main-music) (string? ly:dir? ly:music?)
314 (_i "Insert contents of quote @var{what} corresponding to @var{main-music},
315 in a CueVoice oriented by @var{dir}.")
316 (make-music 'QuoteMusic
318 'quoted-context-type 'CueVoice
319 'quoted-context-id "cue"
320 'quoted-music-name what
321 'quoted-voice-direction dir))
324 #(define-music-function
325 (parser location what dir clef main-music) (string? ly:dir? string? ly:music?)
326 (_i "Insert contents of quote @var{what} corresponding to @var{main-music},
327 in a CueVoice oriented by @var{dir}.")
328 (make-music 'QuoteMusic
330 'quoted-context-type 'CueVoice
331 'quoted-context-id "cue"
332 'quoted-music-name what
333 'quoted-music-clef clef
334 'quoted-voice-direction dir))
339 #(define-music-function (parser location music) (ly:music?)
340 (_i "Display the LilyPond input representation of @var{music}
343 (display-lily-music music parser)
347 #(define-music-function (parser location music) (ly:music?)
348 (_i "Display the internal representation of @var{music} to the console.")
350 (display-scheme-music music)
354 #(define-scheme-function (parser location expr) (scheme?)
355 (_i "Display the internal representation of @var{expr} to the console.")
357 (display-scheme-music expr)
363 #(define-music-function (parser location music) (ly:music?)
364 (_i "Terminate the next spanner prematurely after exactly one note
365 without the need of a specific end spanner.")
366 (let* ((start-span-evs (filter (lambda (ev)
367 (equal? (ly:music-property ev 'span-direction)
369 (extract-typed-music music 'span-event)))
372 (music-clone m 'span-direction STOP))
374 (end-ev-chord (make-music 'EventChord
375 'elements stop-span-evs))
376 (total (make-music 'SequentialMusic
377 'elements (list music
382 #(define-music-function (parser location music) (ly:music?)
383 (_i "Compatibility function wrapping @code{EventChord} around
384 isolated rhythmic events occuring since version 2.15.28, after
385 expanding repeat chords @samp{q}.")
386 (event-chord-wrap! music parser))
389 #(define-music-function (parser location factor argument) (ly:moment? ly:music?)
390 (_i "Adjust durations of music in @var{argument} by rational @var{factor}.")
391 (let ((orig-duration (ly:music-length argument))
392 (multiplier (ly:make-moment 1 1)))
396 (if (< 0 (ly:moment-main-denominator (ly:music-length mus)))
398 (ly:music-compress mus multiplier)
399 (set! multiplier (ly:moment-mul factor multiplier)))))
400 (extract-named-music argument '(EventChord NoteEvent RestEvent SkipEvent)))
403 (ly:moment-div orig-duration (ly:music-length argument)))
408 #(define-event-function (parser location finger) (number-or-markup?)
409 (_i "Apply @var{finger} as a fingering indication.")
413 (if (number? finger) 'digit 'text)
417 #(define-music-function (parser location mark offset footnote item)
418 ((markup?) number-pair? markup? symbol-list-or-music?)
419 (_i "Make the markup @var{footnote} a footnote on @var{item}. The
420 footnote is marked with a markup @var{mark} moved by @var{offset} with
421 respect to the marked music.
423 If @var{mark} is not given or specified as @var{\\default}, it is
424 replaced by an automatically generated sequence number. If @var{item}
425 is a symbol list of form @samp{Grob} or @samp{Context.Grob}, then
426 grobs of that type will be marked at the current time step in the
427 given context (default @code{Bottom}).
429 If @var{item} is music, the music will get a footnote attached to a
430 grob immediately attached to the event, like @var{\\tweak} does. For
431 attaching a footnote to an @emph{indirectly} caused grob, write
432 @code{\\single\\footnote}, use @var{item} to specify the grob, and
433 follow it with the music to annotate.
435 Like with @code{\\tweak}, if you use a footnote on a following
436 post-event, the @code{\\footnote} command itself needs to be attached
437 to the preceding note or rest as a post-event with @code{-}.")
438 (let ((mus (make-music
440 'X-offset (car offset)
441 'Y-offset (cdr offset)
442 'automatically-numbered (not mark)
443 'text (or mark (make-null-markup))
444 'footnote-text footnote)))
445 #{ \once \tweak footnote-music #mus #item #}))
448 #(def-grace-function startGraceMusic stopGraceMusic
449 (_i "Insert @var{music} as grace notes."))
452 #(define-scheme-function (parser location descriptions) (list?)
453 (_i "Create a context modification from @var{descriptions}, a list
454 in the format of @code{all-grob-descriptions}.")
457 (list 'assign (car p) (list (cdr p))))
460 harmonicByFret = #(define-music-function (parser location fret music) (number? ly:music?)
461 (_i "Convert @var{music} into mixed harmonics; the resulting notes resemble
462 harmonics played on a fretted instrument by touching the strings at @var{fret}.")
464 \set harmonicDots = ##t
465 \temporary \override TabNoteHead.stencil = #(tab-note-head::print-custom-fret-label (number->string fret))
466 \temporary \override NoteHead.Y-extent = #grob::always-Y-extent-from-stencil
467 \temporary \override NoteHead.stencil = #(lambda (grob) (ly:grob-set-property! grob 'style 'harmonic-mixed)
468 (ly:note-head::print grob))
470 (calc-harmonic-pitch (fret->pitch (number->string fret)) music))
472 \revert TabNoteHead.stencil
473 \revert NoteHead.Y-extent
474 \revert NoteHead.stencil
477 harmonicByRatio = #(define-music-function (parser location ratio music) (number? ly:music?)
478 (_i "Convert @var{music} into mixed harmonics; the resulting notes resemble
479 harmonics played on a fretted instrument by touching the strings at the point
480 given through @var{ratio}.")
482 \set harmonicDots = ##t
483 \temporary \override TabNoteHead.stencil = #(tab-note-head::print-custom-fret-label (ratio->fret ratio))
484 \temporary \override NoteHead.Y-extent = #(ly:make-unpure-pure-container ly:grob::stencil-height
485 (lambda (grob start end)
486 (ly:grob::stencil-height grob)))
487 \temporary \override NoteHead.stencil = #(lambda (grob) (ly:grob-set-property! grob 'style 'harmonic-mixed)
488 (ly:note-head::print grob))
490 (calc-harmonic-pitch (ratio->pitch ratio) music))
492 \revert TabNoteHead.stencil
493 \revert NoteHead.Y-extent
494 \revert NoteHead.stencil
498 #(define-music-function (parser location item) (symbol-list-or-music?)
499 (_i "Set @var{item}'s @samp{transparent} property to @code{#t},
500 making it invisible while still retaining its dimensions.
502 If @var{item} is a symbol list of form @code{GrobName} or
503 @code{Context.GrobName}, the result is an override for the grob name
504 specified by it. If @var{item} is a music expression, the result is
505 the same music expression with an appropriate tweak applied to it.")
506 #{ \tweak transparent ##t #item #})
509 #(define-music-function (parser location) ()
510 (_i "Put the segno variant 'varsegno' at this position into the staff,
511 compatible with the repeat command.")
512 (make-music 'ApplyContext
515 (let ((score-ctx (ly:context-find ctx 'Score)))
516 (if (ly:context? score-ctx)
517 (let ((old-rc (ly:context-property score-ctx 'repeatCommands '())))
518 (if (eq? (memq 'segno-display old-rc) #f)
519 (ly:context-set-property! score-ctx 'repeatCommands (cons 'segno-display old-rc)))))))))
522 #(define-music-function
523 (parser location name) (string?)
524 (_i "Switch instrument to @var{name}, which must be predefined with
525 @code{\\addInstrumentDefinition}.")
526 (let* ((handle (assoc name instrument-definitions))
527 (instrument-def (if handle (cdr handle) '())))
530 (ly:input-warning location "No such instrument: ~a" name))
532 (make-music 'SimultaneousMusic
544 #(define-music-function (parser location tag music)
545 (symbol-list-or-symbol? ly:music?)
546 (_i "Include only elements of @var{music} that are either untagged
547 or tagged with one of the tags in @var{tag}. @var{tag} may be either
548 a single symbol or a list of symbols.")
552 (let ((music-tags (ly:music-property m 'tags)))
553 (or (null? music-tags)
554 (memq tag music-tags))))
556 (let ((music-tags (ly:music-property m 'tags)))
557 (or (null? music-tags)
558 (any (lambda (t) (memq t music-tags)) tag)))))
562 #(define-music-function (parser location tonic pitch-alist)
563 ((ly:pitch? '()) (list? '()))
564 (_i "Set key to @var{tonic} and scale @var{pitch-alist}.
565 If both are null, just generate @code{KeyChangeEvent}.")
566 (cond ((null? tonic) (make-music 'KeyChangeEvent))
568 (ly:parser-error parser (_ "second argument must be pitch list")
570 (make-music 'SequentialMusic 'void #t))
573 (make-music 'KeyChangeEvent
574 'tonic (ly:make-pitch 0 0 0)
575 'pitch-alist pitch-alist)
579 #(define-music-function (parser location music) (ly:music?)
580 (_i "Remove cue notes from @var{music}.")
583 (if (and (string? (ly:music-property mus 'quoted-music-name))
584 (string=? (ly:music-property mus 'quoted-context-id "") "cue"))
585 (ly:music-property mus 'element)
592 #(define-music-function (parser location label) (symbol?)
593 (_i "Create @var{label} as a bookmarking label.")
594 (make-music 'EventChord
597 'elements (list (make-music 'LabelEvent
598 'page-label label))))
602 #(define-void-function (parser location language) (string?)
603 (_i "Set note names for language @var{language}.")
604 (note-names-language parser language))
606 languageSaveAndChange =
607 #(define-void-function (parser location language) (string?)
608 (_i "Store the previous pitchnames alist, and set a new one.")
609 (set! previous-pitchnames pitchnames)
610 (note-names-language parser language))
613 #(define-void-function (parser location) ()
614 (_i "Restore a previously-saved pitchnames alist.")
615 (if previous-pitchnames
617 (set! pitchnames previous-pitchnames)
618 (ly:parser-set-note-names parser pitchnames))
619 (ly:input-warning location (_ "No other language was defined previously. Ignoring."))))
623 #(define-music-function (parser location arg) (ly:music?)
624 (_i "Display chords in @var{arg} as clusters.")
625 (music-map note-to-cluster arg))
628 #(define-music-function (parser location around to scale music)
629 (ly:pitch? ly:pitch? ly:music? ly:music?)
630 (_i "Invert @var{music} about @var{around} using @var{scale} and
631 transpose from @var{around} to @var{to}.")
632 (let ((inverter (make-modal-inverter around to scale)))
633 (change-pitches music inverter)
637 #(define-music-function (parser location from to scale music)
638 (ly:pitch? ly:pitch? ly:music? ly:music?)
639 (_i "Transpose @var{music} from pitch @var{from} to pitch @var{to}
641 (let ((transposer (make-modal-transposer from to scale)))
642 (change-pitches music transposer)
646 #(define-music-function
647 (parser location around to music) (ly:pitch? ly:pitch? ly:music?)
648 (_i "Invert @var{music} about @var{around} and
649 transpose from @var{around} to @var{to}.")
650 (music-invert around to music))
653 #(define-music-function
654 (parser location label) ((scheme? '()))
655 "Make the music for the \\mark command."
656 (let* ((set (and (integer? label)
657 (context-spec-music (make-property-set 'rehearsalMark label)
659 (ev (make-music 'MarkEvent
663 (make-sequential-music (list set ev))
665 (set! (ly:music-property ev 'label) label)
669 #(define-music-function (parser location proc mus) (procedure? ly:music?)
670 (_i "Apply @var{proc} to @var{mus} and all of the music it contains.")
671 (music-map proc mus))
673 %% noPageBreak and noPageTurn are music functions (not music indentifiers),
674 %% because music identifiers are not allowed at top-level.
676 #(define-music-function (location parser) ()
677 (_i "Forbid a page break. May be used at toplevel (i.e., between scores or
678 markups), or inside a score.")
679 (make-music 'EventChord
681 'page-break-permission 'forbid
682 'elements (list (make-music 'PageBreakEvent
683 'break-permission '()))))
686 #(define-music-function (location parser) ()
687 (_i "Forbid a page turn. May be used at toplevel (i.e., between scores or
688 markups), or inside a score.")
689 (make-music 'EventChord
691 'page-turn-permission 'forbid
692 'elements (list (make-music 'PageTurnEvent
693 'break-permission '()))))
698 #(define-music-function (parser location pitch) (ly:pitch?)
700 (make-music 'RelativeOctaveCheck
704 #(define-music-function (parser location property offsets item)
705 (symbol-list-or-symbol? scheme? symbol-list-or-music?)
706 (_i "Offset the default value of @var{property} of @var{item} by
707 @var{offsets}. If @var{item} is a string, the result is
708 @code{\\override} for the specified grob type. If @var{item} is
709 a music expression, the result is the same music expression with an
710 appropriate tweak applied.")
712 ; In case of a tweak, grob property path is Grob.property
713 (let ((prop-path (check-grob-path
714 (if (symbol? property)
718 #:start 1 #:default #t #:min 2 #:max 2)))
720 ; If the head of the grob property path is a symbol--i.e.,
721 ; a grob name, produce a directed tweak. Otherwise, create
723 (if (symbol? (car prop-path))
725 \tweak #prop-path #(offsetter (second prop-path) offsets) #item
728 \tweak #(second prop-path) #(offsetter (second prop-path) offsets) #item
731 ; In case of an override, grob property path is Context.Grob.property.
732 (let ((prop-path (check-grob-path
734 (if (symbol? property)
738 #:default 'Bottom #:min 3 #:max 3)))
741 \override #prop-path = #(offsetter (third prop-path) offsets)
743 (make-music 'Music)))))
746 #(define-music-function (parser location item) (symbol-list-or-music?)
747 (_i "Set @var{item}'s @samp{stencil} property to @code{#f},
748 effectively omitting it without taking up space.
750 If @var{item} is a symbol list of form @code{GrobName} or
751 @code{Context.GrobName}, the result is an override for the grob name
752 specified by it. If @var{item} is a music expression, the result is
753 the same music expression with an appropriate tweak applied to it.")
754 #{ \tweak stencil ##f #item #})
757 #(define-music-function (parser location music) (ly:music?)
758 (_i "Set @code{once} to @code{#t} on all layout instruction events
759 in @var{music}. This will complain about music with an actual
760 duration. As a special exception, if @var{music} contains
761 @samp{tweaks} it will be silently ignored in order to allow for
762 @code{\\once \\tweak} to work as both one-time override and proper
764 (if (not (pair? (ly:music-property music 'tweaks)))
767 (cond ((music-is-of-type? m 'layout-instruction-event)
768 (set! (ly:music-property m 'once) #t)
770 ((ly:duration? (ly:music-property m 'duration))
771 (ly:music-warning m (_ "Cannot apply \\once to timed music"))
778 #(define-music-function (parser location octave) (integer?)
779 (_i "Set the octavation.")
780 (make-music 'OttavaMusic
781 'ottava-number octave))
783 overrideTimeSignatureSettings =
784 #(define-music-function
785 (parser location time-signature base-moment beat-structure beam-exceptions)
786 (fraction? fraction? list? list?)
788 (_i "Override @code{timeSignatureSettings}
789 for time signatures of @var{time-signature} to have settings
790 of @var{base-moment}, @var{beat-structure}, and @var{beam-exceptions}.")
792 ;; TODO -- add warning if largest value of grouping is
793 ;; greater than time-signature.
794 (let ((setting (make-setting base-moment beat-structure beam-exceptions)))
795 (override-time-signature-setting time-signature setting)))
798 #(define-music-function (parser location grob-property-path value)
799 (symbol-list? scheme?)
801 (_i "Set the grob property specified by @var{grob-property-path} to
802 @var{value}. @var{grob-property-path} is a symbol list of the form
803 @code{Context.GrobName.property} or @code{GrobName.property}, possibly
804 with subproperties given as well.")
805 (let ((p (check-grob-path grob-property-path parser location
809 (make-music 'ApplyOutputEvent
810 'context-type (first p)
812 (lambda (grob orig-context context)
814 (cdr (assoc 'name (ly:grob-property grob 'meta)))
816 (ly:grob-set-nested-property!
817 grob (cddr p) value))))
818 (make-music 'Music))))
825 %% pageBreak and pageTurn are music functions (iso music indentifiers),
826 %% because music identifiers are not allowed at top-level.
828 #(define-music-function (location parser) ()
829 (_i "Force a page break. May be used at toplevel (i.e., between scores or
830 markups), or inside a score.")
831 (make-music 'EventChord
833 'line-break-permission 'force
834 'page-break-permission 'force
835 'elements (list (make-music 'LineBreakEvent
836 'break-permission 'force)
837 (make-music 'PageBreakEvent
838 'break-permission 'force))))
841 #(define-music-function (location parser) ()
842 (_i "Force a page turn between two scores or top-level markups.")
843 (make-music 'EventChord
845 'line-break-permission 'force
846 'page-break-permission 'force
847 'page-turn-permission 'force
848 'elements (list (make-music 'LineBreakEvent
849 'break-permission 'force)
850 (make-music 'PageBreakEvent
851 'break-permission 'force)
852 (make-music 'PageTurnEvent
853 'break-permission 'force))))
856 #(define-void-function (parser location voice-ids music) (list? ly:music?)
857 (_i "Define parallel music sequences, separated by '|' (bar check signs),
858 and assign them to the identifiers provided in @var{voice-ids}.
860 @var{voice-ids}: a list of music identifiers (symbols containing only letters)
862 @var{music}: a music sequence, containing BarChecks as limiting expressions.
867 \\parallelMusic #'(A B C) {
877 (define (bar-check? m)
878 "Checks whether m is a bar check."
879 (eq? (ly:music-property m 'name) 'BarCheck))
880 (define (recurse-and-split music)
881 "This returns either a list of music split along barchecks, or
883 (let ((elt (ly:music-property music 'element))
884 (elts (ly:music-property music 'elements)))
885 (cond ((ly:music? elt)
886 (let ((lst (recurse-and-split elt)))
890 (let ((res (music-clone music 'element x)))
891 (if (ly:input-location?
892 (ly:music-property x 'origin))
893 (set! (ly:music-property res 'origin)
894 (ly:music-property x 'origin)))
897 ((any bar-check? elts)
898 (let* ((voices (apply circular-list
899 (make-list (length voice-ids)
901 (current-voices voices)
902 (current-sequence '()))
905 (define (push-music m)
906 "Push the music expression into the current sequence"
907 (set! current-sequence (cons m current-sequence)))
908 (define (change-voice)
909 "Stores the previously built sequence into the current voice and
910 change to the following voice."
911 (set-car! current-voices
912 (cons (reverse! current-sequence)
913 (car current-voices)))
914 (set! current-sequence '())
915 (set! current-voices (cdr current-voices)))
916 (for-each (lambda (m)
917 (let ((split? (recurse-and-split m)))
926 (if (bar-check? m) (change-voice))))))
928 (if (pair? current-sequence) (change-voice))
929 ;; un-circularize `voices' and reorder the voices
931 (set! voices (map reverse!
932 (list-head voices (length voice-ids))))
934 ;; check sequence length
935 (apply for-each (lambda seqs
936 (define (seq-len seq)
937 (reduce ly:moment-add
939 (map ly:music-length seq)))
940 (let ((moment-reference (seq-len (car seqs))))
941 (for-each (lambda (seq)
942 (if (not (equal? (seq-len seq)
948 (_ "Bars in parallel music don't have the same length"))))
953 (set! lst (concatenate! lst))
954 (let ((res (music-clone music 'elements lst)))
956 (ly:input-location? (ly:music-property
959 (set! (ly:music-property res 'origin)
960 (ly:music-property (car lst) 'origin)))
964 (let ((voices (recurse-and-split music)))
967 ;; bind voice identifiers to the voices
968 (for-each (lambda (voice-id voice)
969 (ly:parser-define! parser voice-id voice))
971 (ly:music-warning music
972 (_ "ignoring parallel music without barchecks")))))
975 #(define-music-function (parser loc arg) (ly:music?)
976 (_i "Tag @var{arg} to be parenthesized.")
978 (if (memq 'event-chord (ly:music-property arg 'types))
979 ;; arg is an EventChord -> set the parenthesize property
980 ;; on all child notes and rests
983 (if (or (memq 'note-event (ly:music-property ev 'types))
984 (memq 'rest-event (ly:music-property ev 'types)))
985 (set! (ly:music-property ev 'parenthesize) #t)))
986 (ly:music-property arg 'elements))
987 ;; No chord, simply set property for this expression:
988 (set! (ly:music-property arg 'parenthesize) #t))
992 #(define-music-function (parser location part1 part2) (ly:music? ly:music?)
993 (_i "Take the music in @var{part1} and @var{part2} and typeset so
994 that they share a staff.")
995 (make-part-combine-music parser
996 (list part1 part2) #f))
999 #(define-music-function (parser location part1 part2) (ly:music? ly:music?)
1000 (_i "Take the music in @var{part1} and @var{part2} and typeset so
1001 that they share a staff with stems directed upward.")
1002 (make-part-combine-music parser
1003 (list part1 part2) UP))
1006 #(define-music-function (parser location part1 part2) (ly:music? ly:music?)
1007 (_i "Take the music in @var{part1} and @var{part2} and typeset so
1008 that they share a staff with stems directed downward.")
1009 (make-part-combine-music parser
1010 (list part1 part2) DOWN))
1013 #(define-music-function (location parser type once) (symbol-or-boolean? boolean?)
1014 (_i "Override the part-combiner.")
1015 (make-music 'EventChord
1016 'elements (list (make-music 'PartCombineForceEvent
1019 partcombineApart = \partcombineForce #'apart ##f
1020 partcombineApartOnce = \partcombineForce #'apart ##t
1021 partcombineChords = \partcombineForce #'chords ##f
1022 partcombineChordsOnce = \partcombineForce #'chords ##t
1023 partcombineUnisono = \partcombineForce #'unisono ##f
1024 partcombineUnisonoOnce = \partcombineForce #'unisono ##t
1025 partcombineSoloI = \partcombineForce #'solo1 ##f
1026 partcombineSoloIOnce = \partcombineForce #'solo1 ##t
1027 partcombineSoloII = \partcombineForce #'solo2 ##f
1028 partcombineSoloIIOnce = \partcombineForce #'solo2 ##t
1029 partcombineAutomatic = \partcombineForce ##f ##f
1030 partcombineAutomaticOnce = \partcombineForce ##f ##t
1033 #(define-music-function (parser location dur) (ly:duration?)
1034 (_i "Make a partial measure.")
1036 ;; We use `descend-to-context' here instead of `context-spec-music' to
1037 ;; ensure \partial still works if the Timing_translator is moved
1039 (context-spec-music (make-music 'PartialSet
1046 #(define-music-function
1047 (parser location main-note secondary-note)
1048 (ly:music? ly:music?)
1049 (_i "Print a trill with @var{main-note} as the main note of the trill and
1050 print @var{secondary-note} as a stemless note head in parentheses.")
1051 (let* ((get-notes (lambda (ev-chord)
1052 (extract-named-music ev-chord 'NoteEvent)))
1053 (sec-note-events (get-notes secondary-note))
1054 (trill-events (extract-named-music main-note 'TrillSpanEvent)))
1055 (if (pair? sec-note-events)
1057 (let* ((trill-pitch (ly:music-property (car sec-note-events) 'pitch))
1058 (forced (ly:music-property (car sec-note-events) 'force-accidental)))
1060 (if (ly:pitch? trill-pitch)
1061 (for-each (lambda (m)
1062 (ly:music-set-property! m 'pitch trill-pitch)) trill-events)
1064 (ly:input-warning location (_ "Second argument of \\pitchedTrill should be single note: "))
1065 (display sec-note-events)))
1068 (for-each (lambda (m)
1069 (ly:music-set-property! m 'force-accidental forced))
1074 #(define-music-function (parser location tag more music)
1075 (symbol? ly:music? ly:music?)
1076 (_i "Add @var{more} to the front of @code{elements} of all music
1077 expressions in @var{music} that are tagged with @var{tag}.")
1078 (music-map (lambda (m)
1079 (if (memq tag (ly:music-property m 'tags))
1080 (set! (ly:music-property m 'elements)
1081 (cons more (ly:music-property m 'elements))))
1086 #(define-music-function (parser location what main-music) (string? ly:music?)
1087 (_i "Indicate a section of music to be quoted. @var{what} indicates the name
1088 of the quoted voice, as specified in an @code{\\addQuote} command.
1089 @var{main-music} is used to indicate the length of music to be quoted;
1090 usually contains spacers or multi-measure rests.")
1091 (make-music 'QuoteMusic
1093 'quoted-music-name what))
1096 #(define-music-function (parser location pitch music)
1097 ((ly:pitch?) ly:music?)
1098 (_i "Make @var{music} relative to @var{pitch}. If @var{pitch} is
1099 omitted, the first note in @var{music} is given in absolute pitch.")
1100 ;; When \relative has no clear decision (can only happen with
1101 ;; scales with an even number of steps), it goes down (see
1102 ;; pitch.cc). The following formula puts out f for both the normal
1103 ;; 7-step scale as well as for a "shortened" scale missing the
1104 ;; final b. In either case, a first note of c will end up as c,
1105 ;; namely pitch (-1, 0, 0).
1106 (ly:make-music-relative! music
1111 ;; size of current scale:
1112 (ly:pitch-steps (ly:make-pitch 1 0))
1114 (make-music 'RelativeOctaveMusic
1118 #(define-music-function (parser location tag music)
1119 (symbol-list-or-symbol? ly:music?)
1120 (_i "Remove elements of @var{music} that are tagged with one of the
1121 tags in @var{tag}. @var{tag} may be either a single symbol or a list
1126 (not (memq tag (ly:music-property m 'tags))))
1128 (let ((music-tags (ly:music-property m 'tags)))
1129 (or (null? music-tags)
1130 (not (any (lambda (t) (memq t music-tags)) tag))))))
1133 resetRelativeOctave =
1134 #(define-music-function (parser location pitch) (ly:pitch?)
1135 (_i "Set the octave inside a \\relative section.")
1137 (make-music 'SequentialMusic
1138 'to-relative-callback
1139 (lambda (music last-pitch) pitch)))
1142 #(define-music-function (parser location music)
1144 (_i "Return @var{music} in reverse order.")
1145 (retrograde-music music))
1147 revertTimeSignatureSettings =
1148 #(define-music-function
1149 (parser location time-signature)
1152 (_i "Revert @code{timeSignatureSettings}
1153 for time signatures of @var{time-signature}.")
1154 (revert-time-signature-setting time-signature))
1157 #(define-event-function (parser location finger) (number-or-markup?)
1158 (_i "Apply @var{finger} as a fingering indication.")
1162 (if (number? finger) 'digit 'text)
1166 #(define-music-function (parser location fraction music)
1167 (fraction? ly:music?)
1168 (_i "Multiply the duration of events in @var{music} by @var{fraction}.")
1169 (ly:music-compress music
1170 (ly:make-moment (car fraction) (cdr fraction))))
1173 #(define-scheme-function (parser location ctx music)
1174 ((symbol?) ly:music?)
1175 (_i "Take the layout instruction events from @var{music}, optionally
1176 restricted to those applying to context type @var{ctx}, and return
1177 a context modification duplicating their effect.")
1178 (let ((mods (ly:make-context-mod)))
1180 (if (music-is-of-type? m 'layout-instruction-event)
1183 (case (ly:music-property m 'name)
1186 (ly:music-property m 'symbol)
1187 (ly:music-property m 'value)))
1190 (ly:music-property m 'symbol)))
1193 (ly:music-property m 'symbol)
1194 (ly:music-property m 'grob-value)
1196 ((ly:music-property m 'grob-property #f) => list)
1198 (ly:music-property m 'grob-property-path)))))
1201 (ly:music-property m 'symbol)
1203 ((ly:music-property m 'grob-property #f) => list)
1205 (ly:music-property m 'grob-property-path)))))))
1206 (case (ly:music-property m 'name)
1208 (ly:add-context-mod mods
1210 (ly:music-property m 'procedure))))
1211 ((ContextSpeccedMusic)
1213 (eq? ctx (ly:music-property m 'context-type)))
1214 (musicop (ly:music-property m 'element))))
1216 (let ((callback (ly:music-property m 'elements-callback)))
1217 (if (procedure? callback)
1218 (for-each musicop (callback m))))))))
1223 #(define-music-function (parser location offsets item)
1224 (list? symbol-list-or-music?)
1225 (_i "Offset control-points of @var{item} by @var{offsets}. The
1226 argument is a list of number pairs or list of such lists. Each
1227 element of a pair represents an offset to one of the coordinates of a
1228 control-point. If @var{item} is a string, the result is
1229 @code{\\once\\override} for the specified grob type. If @var{item} is
1230 a music expression, the result is the same music expression with an
1231 appropriate tweak applied.")
1232 (define (shape-curve grob)
1233 (let* ((orig (ly:grob-original grob))
1234 (siblings (if (ly:spanner? grob)
1235 (ly:spanner-broken-into orig) '()))
1236 (total-found (length siblings))
1237 (function (assoc-get 'control-points
1238 (reverse (ly:grob-basic-properties grob))))
1239 (coords (function grob)))
1241 (define (offset-control-points offsets)
1245 (lambda (x y) (coord-translate x y))
1248 (define (helper sibs offs)
1250 (if (eq? (car sibs) grob)
1251 (offset-control-points (car offs))
1252 (helper (cdr sibs) (cdr offs)))
1255 ;; we work with lists of lists
1256 (if (or (null? offsets)
1257 (not (list? (car offsets))))
1258 (set! offsets (list offsets)))
1260 (if (>= total-found 2)
1261 (helper siblings offsets)
1262 (offset-control-points (car offsets)))))
1263 #{ \once \tweak control-points #shape-curve #item #})
1266 #(define-music-function (parser location dur dots arg)
1267 (integer? integer? ly:music?)
1268 (_i "Change the duration of @var{arg} by adding @var{dur} to the
1269 @code{durlog} of @var{arg} and @var{dots} to the @code{dots} of @var{arg}.")
1273 (shift-one-duration-log x dur dots)) arg))
1276 #(define-music-function (parser location overrides music)
1277 (ly:music? ly:music?)
1278 (_i "Convert @var{overrides} to tweaks and apply them to @var{music}.
1279 This does not convert @code{\\revert}, @code{\\set} or @code{\\unset}.")
1280 (set! (ly:music-property music 'tweaks)
1282 (lambda (m) (eq? (ly:music-property m 'name)
1286 ((ly:music-property m 'grob-property #f) => list)
1288 (ly:music-property m 'grob-property-path)))))
1289 (acons (cons (ly:music-property m 'symbol) ;grob name
1291 p ;grob property path
1292 (car p))) ;grob property
1293 (ly:music-property m 'grob-value)
1295 (ly:music-property music 'tweaks)
1300 #(define-music-function (parser location dur) (ly:duration?)
1301 (_i "Skip forward by @var{dur}.")
1302 (make-music 'SkipMusic
1307 #(def-grace-function startSlashedGraceMusic stopSlashedGraceMusic
1308 (_i "Create slashed graces (slashes through stems, but no slur) from
1309 the following music expression"))
1312 #(define-music-function (parser location parameters) (list?)
1313 (_i "Set the system stretch, by reading the 'system-stretch property of
1314 the `parameters' assoc list.")
1316 \overrideProperty Score.NonMusicalPaperColumn.line-break-system-details
1317 #(list (cons 'alignment-extra-space (cdr (assoc 'system-stretch parameters)))
1318 (cons 'system-Y-extent (cdr (assoc 'system-Y-extent parameters))))
1322 #(define-music-function (parser location style heads music)
1323 (symbol? symbol-list-or-symbol? ly:music?)
1324 (_i "Set @var{heads} in @var{music} to @var{style}.")
1325 (style-note-heads heads style music))
1328 #(define-music-function (parser location tag music) (symbol-list-or-symbol? ly:music?)
1329 (_i "Tag the following @var{music} with @var{tag} and return the
1330 result, by adding the single symbol or symbol list @var{tag} to the
1331 @code{tags} property of @var{music}.")
1334 (ly:music-property music 'tags)
1335 ((if (symbol? tag) cons append)
1337 (ly:music-property music 'tags)))
1341 #(define-music-function (parser location music)
1343 (_i "Make any @code{\\override} in @var{music} replace an existing
1344 grob property value only temporarily, restoring the old value when a
1345 corresponding @code{\\revert} is executed. This is achieved by
1346 clearing the @samp{pop-first} property normally set on
1349 An @code{\\override}/@/@code{\\revert} sequence created by using
1350 @code{\\temporary} and @code{\\undo} on the same music containing
1351 overrides will cancel out perfectly or cause a@tie{}warning.
1353 Non-property-related music is ignored, warnings are generated for any
1354 property-changing music that isn't an @code{\\override}.")
1358 (and (or (music-is-of-type? m 'layout-instruction-event)
1359 (music-is-of-type? m 'context-specification)
1360 (music-is-of-type? m 'apply-context)
1361 (music-is-of-type? m 'time-signature-music))
1362 (case (ly:music-property m 'name)
1364 (if (ly:music-property m 'pop-first #f)
1365 (set! (ly:music-property m 'pop-first) '()))
1366 (if (ly:music-property m 'once #f)
1367 (set! (ly:music-property m 'once) '()))
1369 ((ContextSpeccedMusic)
1374 (ly:input-warning location (_ "Cannot make ~a revertible")
1375 (ly:music-property m 'name))
1382 #(define-music-function (parser location beat-structure fraction)
1383 ((number-list? '()) fraction?)
1384 (_i "Set @var{fraction} as time signature, with optional
1385 number list @var{beat-structure} before it.")
1386 (make-music 'TimeSignatureMusic
1387 'numerator (car fraction)
1388 'denominator (cdr fraction)
1389 'beat-structure beat-structure))
1392 #(define-music-function (parser location fraction music)
1393 (fraction? ly:music?)
1394 (_i "Scale @var{music} in time by @var{fraction}.")
1395 (make-music 'TimeScaledMusic
1396 'element (ly:music-compress music (ly:make-moment (car fraction) (cdr fraction)))
1397 'numerator (car fraction)
1398 'denominator (cdr fraction)))
1401 #(define-music-function
1402 (parser location from to music)
1403 (ly:pitch? ly:pitch? ly:music?)
1405 (_i "Transpose @var{music} from pitch @var{from} to pitch @var{to}.")
1406 (make-music 'TransposedMusic
1407 'element (ly:music-transpose music (ly:pitch-diff to from))))
1409 transposedCueDuring =
1410 #(define-music-function
1411 (parser location what dir pitch main-music)
1412 (string? ly:dir? ly:pitch? ly:music?)
1414 (_i "Insert notes from the part @var{what} into a voice called @code{cue},
1415 using the transposition defined by @var{pitch}. This happens
1416 simultaneously with @var{main-music}, which is usually a rest. The
1417 argument @var{dir} determines whether the cue notes should be notated
1418 as a first or second voice.")
1420 (make-music 'QuoteMusic
1422 'quoted-context-type 'CueVoice
1423 'quoted-context-id "cue"
1424 'quoted-music-name what
1425 'quoted-voice-direction dir
1426 ;; following is inverse of instrumentTransposition for
1427 ;; historical reasons
1428 'quoted-transposition pitch))
1431 #(define-music-function (parser location pitch) (ly:pitch?)
1432 (_i "Set instrument transposition")
1435 (make-property-set 'instrumentTransposition pitch)
1439 #(define-music-function (parser location ratio tuplet-span music)
1440 (fraction? (ly:duration? '()) ly:music?)
1441 (_i "Scale the given @var{music} to tuplets. @var{ratio} is a
1442 fraction that specifies how many notes are played in place of the
1443 nominal value: it will be @samp{3/2} for triplets, namely three notes
1444 being played in place of two. If the optional duration
1445 @var{tuplet-span} is specified, it is used instead of
1446 @code{tupletSpannerDuration} for grouping the tuplets.
1449 \\tuplet 3/2 4 @{ c8 c c c c c @}
1451 will result in two groups of three tuplets, each group lasting for a
1453 (make-music 'TimeScaledMusic
1454 'element (ly:music-compress
1456 (ly:make-moment (cdr ratio) (car ratio)))
1457 'numerator (cdr ratio)
1458 'denominator (car ratio)
1459 'duration tuplet-span))
1462 #(define-music-function (parser location tuplet-span)
1464 (_i "Set @code{tupletSpannerDuration}, the length into which
1465 @code{\\tuplet} without an explicit @samp{tuplet-span} argument of its
1466 own will group its tuplets, to the duration @var{tuplet-span}. To
1467 revert to the default of not subdividing the contents of a @code{\\tuplet}
1468 command without explicit @samp{tuplet-span}, use
1470 \\tupletSpan \\default
1474 #{ \set tupletSpannerDuration = #(ly:duration-length tuplet-span) #}
1475 #{ \unset tupletSpannerDuration #}))
1478 #(define-music-function (parser location prop value item)
1479 (symbol-list-or-symbol? scheme? symbol-list-or-music?)
1480 (_i "Add a tweak to the following @var{item}, usually music.
1481 Layout objects created by @var{item} get their property @var{prop}
1482 set to @var{value}. If @var{prop} has the form @samp{Grob.property}, like with
1484 \\tweak Accidental.color #red cis'
1486 an indirectly created grob (@samp{Accidental} is caused by
1487 @samp{NoteHead}) can be tweaked; otherwise only directly created grobs
1490 As a special case, @var{item} may be a symbol list specifying a grob
1491 path, in which case @code{\\override} is called on it instead of
1492 creating tweaked music. This is mainly useful when using
1493 @code{\\tweak} as as a component for building other functions.
1495 If this use case would call for @code{\\once \\override} rather than a
1496 plain @code{\\override}, writing @code{\\once \\tweak @dots{}} can be
1499 @var{prop} can contain additional elements in which case a nested
1500 property (inside of an alist) is tweaked.")
1501 (if (ly:music? item)
1502 (let ((p (check-grob-path prop parser location
1507 (set! (ly:music-property item 'tweaks)
1508 (acons (cond ((pair? (cddr p)) p)
1510 (cons (car p) (cadr p)))
1513 (ly:music-property item 'tweaks))))
1515 ;; We could just throw this at \override and let it sort this
1516 ;; out on its own, but this way we should get better error
1518 (let ((p (check-grob-path
1519 (append item (if (symbol? prop) (list prop) prop))
1521 #:default 'Bottom #:min 3)))
1523 #{ \override #p = #value #}
1524 (make-music 'Music)))))
1527 #(define-music-function (parser location music)
1529 (_i "Convert @code{\\override} and @code{\\set} in @var{music} to
1530 @code{\\revert} and @code{\\unset}, respectively. Any reverts and
1531 unsets already in @var{music} cause a warning. Non-property-related music is ignored.")
1538 (lambda (m) (or (music-is-of-type? m 'layout-instruction-event)
1539 (music-is-of-type? m 'context-specification)
1540 (music-is-of-type? m 'apply-context)
1541 (music-is-of-type? m 'time-signature-music)))
1542 (lambda (m overrides)
1543 (case (ly:music-property m 'name)
1546 (make-music 'RevertProperty
1547 'symbol (ly:music-property m 'symbol)
1550 ((ly:music-property m 'grob-property #f) => list)
1552 (ly:music-property m 'grob-property-path))))
1556 (make-music 'PropertyUnset
1557 'symbol (ly:music-property m 'symbol))
1559 ((ContextSpeccedMusic)
1561 (make-music 'ContextSpeccedMusic
1562 'element (loop (ly:music-property m 'element))
1563 'context-type (ly:music-property m 'context-type))
1568 (ly:input-warning location (_ "Cannot revert ~a")
1569 (ly:music-property m 'name))
1575 ((null? lst) (make-music 'Music))
1576 ((null? (cdr lst)) (car lst))
1577 (else (make-sequential-music lst))))))
1580 #(define-music-function (parser location music) (ly:music?)
1581 (_i "Force any @code{\\repeat volta}, @code{\\repeat tremolo} or
1582 @code{\\repeat percent} commands in @var{music} to be interpreted
1583 as @code{\\repeat unfold}.")
1584 (unfold-repeats music))
1587 #(define-void-function (parser location arg) (scheme?)
1588 (_i "Accept a scheme argument, return a void expression.
1589 Use this if you want to have a scheme expression evaluated
1590 because of its side-effects, but its value ignored."))
1593 #(define-music-function (parser location sym val music)
1594 (symbol? scheme? ly:music?)
1595 (_i "Set @var{sym} to @var{val} in @var{music}.")
1597 (set! (ly:music-property music sym) val)