1 %%%% -*- Mode: Scheme -*-
3 %%%% This file is part of LilyPond, the GNU music typesetter.
5 %%%% Copyright (C) 2003--2014 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
258 (lambda (len context)
259 ;;Shorten by half, or by up to a second, but always by a power of 2
260 (let* ((desired (min (ly:moment-main (seconds->moment 1 context))
261 (* (ly:moment-main len) 1/2)))
262 (scale (inexact->exact (ceiling (/ (log desired) (log 1/2)))))
263 (breath (ly:make-moment (expt 1/2 scale))))
264 (ly:moment-sub (ly:make-moment (ly:moment-main len)) breath)))))
267 #(define-music-function (parser location type) (string?)
268 (_i "Set the current clef to @var{type}.")
269 (make-clef-set type))
273 #(define-music-function (parser location args) (pair?)
274 (_i "Create compound time signatures. The argument is a Scheme list of
275 lists. Each list describes one fraction, with the last entry being the
276 denominator, while the first entries describe the summands in the
277 enumerator. If the time signature consists of just one fraction,
278 the list can be given directly, i.e. not as a list containing a single list.
279 For example, a time signature of (3+1)/8 + 2/4 would be created as
280 @code{\\compoundMeter #'((3 1 8) (2 4))}, and a time signature of (3+2)/8
281 as @code{\\compoundMeter #'((3 2 8))} or shorter
282 @code{\\compoundMeter #'(3 2 8)}.")
283 (let* ((mlen (calculate-compound-measure-length args))
284 (beat (calculate-compound-base-beat args))
285 (beatGrouping (calculate-compound-beat-grouping args))
286 (timesig (cons (ly:moment-main-numerator mlen)
287 (ly:moment-main-denominator mlen))))
289 \once \override Staff.TimeSignature.stencil = #(lambda (grob)
290 (grob-interpret-markup grob (format-compound-time args)))
291 \set Timing.timeSignatureFraction = #timesig
292 \set Timing.baseMoment = #beat
293 \set Timing.beatStructure = #beatGrouping
294 \set Timing.beamExceptions = #'()
295 \set Timing.measureLength = #mlen
299 #(define-music-function (parser location notes) (ly:music?)
300 (_i "Create cross-staff stems")
302 \temporary \override Stem.cross-staff = #cross-staff-connect
303 \temporary \override Flag.style = #'no-flag
305 \revert Stem.cross-staff
310 #(define-music-function (parser location type) (string?)
311 (_i "Set the current cue clef to @var{type}.")
312 (make-cue-clef-set type))
315 #(define-music-function (parser location) ()
316 (_i "Unset the current cue clef.")
317 (make-cue-clef-unset))
320 #(define-music-function
321 (parser location what dir main-music) (string? ly:dir? ly:music?)
322 (_i "Insert contents of quote @var{what} corresponding to @var{main-music},
323 in a CueVoice oriented by @var{dir}.")
324 (make-music 'QuoteMusic
326 'quoted-context-type 'CueVoice
327 'quoted-context-id "cue"
328 'quoted-music-name what
329 'quoted-voice-direction dir))
332 #(define-music-function
333 (parser location what dir clef main-music) (string? ly:dir? string? ly:music?)
334 (_i "Insert contents of quote @var{what} corresponding to @var{main-music},
335 in a CueVoice oriented by @var{dir}.")
336 (make-music 'QuoteMusic
338 'quoted-context-type 'CueVoice
339 'quoted-context-id "cue"
340 'quoted-music-name what
341 'quoted-music-clef clef
342 'quoted-voice-direction dir))
347 #(define-music-function (parser location port music) ((output-port?) ly:music?)
348 (_i "Display the LilyPond input representation of @var{music}
349 to @var{port}, defaulting to the console.")
350 (let ((port (or port (current-output-port))))
352 (display-lily-music music parser port))
356 #(define-music-function (parser location port music) ((output-port?) ly:music?)
357 (_i "Display the internal representation of @var{music} to
358 @var{port}, default to the console.")
359 (let ((port (or port (current-output-port))))
361 (display-scheme-music music port))
365 #(define-scheme-function (parser location port expr) ((output-port?) scheme?)
366 (_i "Display the internal representation of @var{expr} to
367 @var{port}, default to the console.")
368 (let ((port (or port (current-output-port))))
370 (display-scheme-music expr port))
376 #(define-music-function (parser location music) (ly:music?)
377 (_i "Terminate the next spanner prematurely after exactly one note
378 without the need of a specific end spanner.")
379 (let* ((start-span-evs (filter (lambda (ev)
380 (equal? (ly:music-property ev 'span-direction)
382 (extract-typed-music music 'span-event)))
385 (music-clone m 'span-direction STOP))
387 (end-ev-chord (make-music 'EventChord
388 'elements stop-span-evs))
389 (total (make-music 'SequentialMusic
390 'elements (list music
395 #(define-music-function (parser location music) (ly:music?)
396 (_i "Compatibility function wrapping @code{EventChord} around
397 isolated rhythmic events occuring since version 2.15.28, after
398 expanding repeat chords @samp{q}.")
399 (event-chord-wrap! music parser))
402 #(define-music-function (parser location factor argument) (ly:moment? ly:music?)
403 (_i "Adjust durations of music in @var{argument} by rational @var{factor}.")
404 (let ((orig-duration (ly:music-length argument))
405 (multiplier (ly:make-moment 1 1)))
409 (if (< 0 (ly:moment-main-denominator (ly:music-length mus)))
411 (ly:music-compress mus multiplier)
412 (set! multiplier (ly:moment-mul factor multiplier)))))
413 (extract-named-music argument '(EventChord NoteEvent RestEvent SkipEvent)))
416 (ly:moment-div orig-duration (ly:music-length argument)))
421 #(define-event-function (parser location finger) (number-or-markup?)
422 (_i "Apply @var{finger} as a fingering indication.")
426 (if (number? finger) 'digit 'text)
430 #(define-music-function (parser location mark offset footnote item)
431 ((markup?) number-pair? markup? symbol-list-or-music?)
432 (_i "Make the markup @var{footnote} a footnote on @var{item}. The
433 footnote is marked with a markup @var{mark} moved by @var{offset} with
434 respect to the marked music.
436 If @var{mark} is not given or specified as @var{\\default}, it is
437 replaced by an automatically generated sequence number. If @var{item}
438 is a symbol list of form @samp{Grob} or @samp{Context.Grob}, then
439 grobs of that type will be marked at the current time step in the
440 given context (default @code{Bottom}).
442 If @var{item} is music, the music will get a footnote attached to a
443 grob immediately attached to the event, like @var{\\tweak} does. For
444 attaching a footnote to an @emph{indirectly} caused grob, write
445 @code{\\single\\footnote}, use @var{item} to specify the grob, and
446 follow it with the music to annotate.
448 Like with @code{\\tweak}, if you use a footnote on a following
449 post-event, the @code{\\footnote} command itself needs to be attached
450 to the preceding note or rest as a post-event with @code{-}.")
451 (let ((mus (make-music
453 'X-offset (car offset)
454 'Y-offset (cdr offset)
455 'automatically-numbered (not mark)
456 'text (or mark (make-null-markup))
457 'footnote-text footnote)))
458 #{ \once \tweak footnote-music #mus #item #}))
461 #(def-grace-function startGraceMusic stopGraceMusic
462 (_i "Insert @var{music} as grace notes."))
465 #(define-scheme-function (parser location descriptions) (list?)
466 (_i "Create a context modification from @var{descriptions}, a list
467 in the format of @code{all-grob-descriptions}.")
470 (list 'assign (car p) (list (cdr p))))
473 harmonicByFret = #(define-music-function (parser location fret music) (number? ly:music?)
474 (_i "Convert @var{music} into mixed harmonics; the resulting notes resemble
475 harmonics played on a fretted instrument by touching the strings at @var{fret}.")
477 \set harmonicDots = ##t
478 \temporary \override TabNoteHead.stencil = #(tab-note-head::print-custom-fret-label (number->string fret))
479 \temporary \override NoteHead.Y-extent = #grob::always-Y-extent-from-stencil
480 \temporary \override NoteHead.stencil = #(lambda (grob) (ly:grob-set-property! grob 'style 'harmonic-mixed)
481 (ly:note-head::print grob))
483 (calc-harmonic-pitch (fret->pitch (number->string fret)) music))
485 \revert TabNoteHead.stencil
486 \revert NoteHead.Y-extent
487 \revert NoteHead.stencil
490 harmonicByRatio = #(define-music-function (parser location ratio music) (number? ly:music?)
491 (_i "Convert @var{music} into mixed harmonics; the resulting notes resemble
492 harmonics played on a fretted instrument by touching the strings at the point
493 given through @var{ratio}.")
495 \set harmonicDots = ##t
496 \temporary \override TabNoteHead.stencil = #(tab-note-head::print-custom-fret-label (ratio->fret ratio))
497 \temporary \override NoteHead.Y-extent = #(ly:make-unpure-pure-container ly:grob::stencil-height
498 (lambda (grob start end)
499 (ly:grob::stencil-height grob)))
500 \temporary \override NoteHead.stencil = #(lambda (grob) (ly:grob-set-property! grob 'style 'harmonic-mixed)
501 (ly:note-head::print grob))
503 (calc-harmonic-pitch (ratio->pitch ratio) music))
505 \revert TabNoteHead.stencil
506 \revert NoteHead.Y-extent
507 \revert NoteHead.stencil
511 #(define-music-function (parser location item) (symbol-list-or-music?)
512 (_i "Set @var{item}'s @samp{transparent} property to @code{#t},
513 making it invisible while still retaining its dimensions.
515 If @var{item} is a symbol list of form @code{GrobName} or
516 @code{Context.GrobName}, the result is an override for the grob name
517 specified by it. If @var{item} is a music expression, the result is
518 the same music expression with an appropriate tweak applied to it.")
519 #{ \tweak transparent ##t #item #})
522 #(define-music-function (parser location) ()
523 (_i "Put the segno variant 'varsegno' at this position into the staff,
524 compatible with the repeat command.")
525 (make-music 'ApplyContext
528 (let ((score-ctx (ly:context-find ctx 'Score)))
529 (if (ly:context? score-ctx)
530 (let ((old-rc (ly:context-property score-ctx 'repeatCommands '())))
531 (if (eq? (memq 'segno-display old-rc) #f)
532 (ly:context-set-property! score-ctx 'repeatCommands (cons 'segno-display old-rc)))))))))
535 #(define-music-function
536 (parser location name) (string?)
537 (_i "Switch instrument to @var{name}, which must be predefined with
538 @code{\\addInstrumentDefinition}.")
539 (let* ((handle (assoc name instrument-definitions))
540 (instrument-def (if handle (cdr handle) '())))
543 (ly:input-warning location "No such instrument: ~a" name))
545 (make-music 'SimultaneousMusic
557 #(define-music-function (parser location tag music)
558 (symbol-list-or-symbol? ly:music?)
559 (_i "Include only elements of @var{music} that are either untagged
560 or tagged with one of the tags in @var{tag}. @var{tag} may be either
561 a single symbol or a list of symbols.")
565 (let ((music-tags (ly:music-property m 'tags)))
566 (or (null? music-tags)
567 (memq tag music-tags))))
569 (let ((music-tags (ly:music-property m 'tags)))
570 (or (null? music-tags)
571 (any (lambda (t) (memq t music-tags)) tag)))))
575 #(define-music-function (parser location tonic pitch-alist)
576 ((ly:pitch? '()) (list? '()))
577 (_i "Set key to @var{tonic} and scale @var{pitch-alist}.
578 If both are null, just generate @code{KeyChangeEvent}.")
579 (cond ((null? tonic) (make-music 'KeyChangeEvent))
581 (ly:parser-error parser (_ "second argument must be pitch list")
583 (make-music 'SequentialMusic 'void #t))
586 (make-music 'KeyChangeEvent
587 'tonic (ly:make-pitch 0 0 0)
588 'pitch-alist pitch-alist)
592 #(define-music-function (parser location music) (ly:music?)
593 (_i "Remove cue notes from @var{music}.")
596 (if (and (string? (ly:music-property mus 'quoted-music-name))
597 (string=? (ly:music-property mus 'quoted-context-id "") "cue"))
598 (ly:music-property mus 'element)
605 #(define-music-function (parser location label) (symbol?)
606 (_i "Create @var{label} as a bookmarking label.")
607 (make-music 'EventChord
610 'elements (list (make-music 'LabelEvent
611 'page-label label))))
615 #(define-void-function (parser location language) (string?)
616 (_i "Set note names for language @var{language}.")
617 (note-names-language parser language))
619 languageSaveAndChange =
620 #(define-void-function (parser location language) (string?)
621 (_i "Store the previous pitchnames alist, and set a new one.")
622 (set! previous-pitchnames pitchnames)
623 (note-names-language parser language))
626 #(define-void-function (parser location) ()
627 (_i "Restore a previously-saved pitchnames alist.")
628 (if previous-pitchnames
630 (set! pitchnames previous-pitchnames)
631 (ly:parser-set-note-names parser pitchnames))
632 (ly:input-warning location (_ "No other language was defined previously. Ignoring."))))
636 #(define-music-function (parser location arg) (ly:music?)
637 (_i "Display chords in @var{arg} as clusters.")
638 (music-map note-to-cluster arg))
641 #(define-music-function (parser location around to scale music)
642 (ly:pitch? ly:pitch? ly:music? ly:music?)
643 (_i "Invert @var{music} about @var{around} using @var{scale} and
644 transpose from @var{around} to @var{to}.")
645 (let ((inverter (make-modal-inverter around to scale)))
646 (change-pitches music inverter)
650 #(define-music-function (parser location from to scale music)
651 (ly:pitch? ly:pitch? ly:music? ly:music?)
652 (_i "Transpose @var{music} from pitch @var{from} to pitch @var{to}
654 (let ((transposer (make-modal-transposer from to scale)))
655 (change-pitches music transposer)
659 #(define-music-function
660 (parser location around to music) (ly:pitch? ly:pitch? ly:music?)
661 (_i "Invert @var{music} about @var{around} and
662 transpose from @var{around} to @var{to}.")
663 (music-invert around to music))
666 #(define-music-function
667 (parser location label) ((scheme? '()))
668 "Make the music for the \\mark command."
669 (let* ((set (and (integer? label)
670 (context-spec-music (make-property-set 'rehearsalMark label)
672 (ev (make-music 'MarkEvent
676 (make-sequential-music (list set ev))
678 (set! (ly:music-property ev 'label) label)
682 #(define-music-function (parser location proc mus) (procedure? ly:music?)
683 (_i "Apply @var{proc} to @var{mus} and all of the music it contains.")
684 (music-map proc mus))
686 %% noPageBreak and noPageTurn are music functions (not music indentifiers),
687 %% because music identifiers are not allowed at top-level.
689 #(define-music-function (location parser) ()
690 (_i "Forbid a page break. May be used at toplevel (i.e., between scores or
691 markups), or inside a score.")
692 (make-music 'EventChord
694 'page-break-permission 'forbid
695 'elements (list (make-music 'PageBreakEvent
696 'break-permission '()))))
699 #(define-music-function (location parser) ()
700 (_i "Forbid a page turn. May be used at toplevel (i.e., between scores or
701 markups), or inside a score.")
702 (make-music 'EventChord
704 'page-turn-permission 'forbid
705 'elements (list (make-music 'PageTurnEvent
706 'break-permission '()))))
711 #(define-music-function (parser location pitch) (ly:pitch?)
713 (make-music 'RelativeOctaveCheck
717 #(define-music-function (parser location property offsets item)
718 (symbol-list-or-symbol? scheme? symbol-list-or-music?)
719 (_i "Offset the default value of @var{property} of @var{item} by
720 @var{offsets}. If @var{item} is a string, the result is
721 @code{\\override} for the specified grob type. If @var{item} is
722 a music expression, the result is the same music expression with an
723 appropriate tweak applied.")
725 ; In case of a tweak, grob property path is Grob.property
726 (let ((prop-path (check-grob-path
727 (if (symbol? property)
731 #:start 1 #:default #t #:min 2 #:max 2)))
733 ; If the head of the grob property path is a symbol--i.e.,
734 ; a grob name, produce a directed tweak. Otherwise, create
736 (if (symbol? (car prop-path))
738 \tweak #prop-path #(offsetter (second prop-path) offsets) #item
741 \tweak #(second prop-path) #(offsetter (second prop-path) offsets) #item
744 ; In case of an override, grob property path is Context.Grob.property.
745 (let ((prop-path (check-grob-path
747 (if (symbol? property)
751 #:default 'Bottom #:min 3 #:max 3)))
754 \override #prop-path = #(offsetter (third prop-path) offsets)
756 (make-music 'Music)))))
759 #(define-music-function (parser location item) (symbol-list-or-music?)
760 (_i "Set @var{item}'s @samp{stencil} property to @code{#f},
761 effectively omitting it without taking up space.
763 If @var{item} is a symbol list of form @code{GrobName} or
764 @code{Context.GrobName}, the result is an override for the grob name
765 specified by it. If @var{item} is a music expression, the result is
766 the same music expression with an appropriate tweak applied to it.")
767 #{ \tweak stencil ##f #item #})
770 #(define-music-function (parser location music) (ly:music?)
771 (_i "Set @code{once} to @code{#t} on all layout instruction events
772 in @var{music}. This will complain about music with an actual
773 duration. As a special exception, if @var{music} contains
774 @samp{tweaks} it will be silently ignored in order to allow for
775 @code{\\once \\tweak} to work as both one-time override and proper
777 (if (not (pair? (ly:music-property music 'tweaks)))
780 (cond ((music-is-of-type? m 'layout-instruction-event)
781 (set! (ly:music-property m 'once) #t)
783 ((ly:duration? (ly:music-property m 'duration))
784 (ly:music-warning m (_ "Cannot apply \\once to timed music"))
791 #(define-music-function (parser location octave) (integer?)
792 (_i "Set the octavation.")
793 (make-music 'OttavaMusic
794 'ottava-number octave))
796 overrideTimeSignatureSettings =
797 #(define-music-function
798 (parser location time-signature base-moment beat-structure beam-exceptions)
799 (fraction? fraction? list? list?)
801 (_i "Override @code{timeSignatureSettings}
802 for time signatures of @var{time-signature} to have settings
803 of @var{base-moment}, @var{beat-structure}, and @var{beam-exceptions}.")
805 ;; TODO -- add warning if largest value of grouping is
806 ;; greater than time-signature.
807 (let ((setting (make-setting base-moment beat-structure beam-exceptions)))
808 (override-time-signature-setting time-signature setting)))
811 #(define-music-function (parser location grob-property-path value)
812 (symbol-list? scheme?)
814 (_i "Set the grob property specified by @var{grob-property-path} to
815 @var{value}. @var{grob-property-path} is a symbol list of the form
816 @code{Context.GrobName.property} or @code{GrobName.property}, possibly
817 with subproperties given as well.")
818 (let ((p (check-grob-path grob-property-path parser location
822 (make-music 'ApplyOutputEvent
823 'context-type (first p)
825 (lambda (grob orig-context context)
827 (cdr (assoc 'name (ly:grob-property grob 'meta)))
829 (ly:grob-set-nested-property!
830 grob (cddr p) value))))
831 (make-music 'Music))))
838 %% pageBreak and pageTurn are music functions (iso music indentifiers),
839 %% because music identifiers are not allowed at top-level.
841 #(define-music-function (location parser) ()
842 (_i "Force a page break. May be used at toplevel (i.e., between scores or
843 markups), or inside a score.")
844 (make-music 'EventChord
846 'line-break-permission 'force
847 'page-break-permission 'force
848 'elements (list (make-music 'LineBreakEvent
849 'break-permission 'force)
850 (make-music 'PageBreakEvent
851 'break-permission 'force))))
854 #(define-music-function (location parser) ()
855 (_i "Force a page turn between two scores or top-level markups.")
856 (make-music 'EventChord
858 'line-break-permission 'force
859 'page-break-permission 'force
860 'page-turn-permission 'force
861 'elements (list (make-music 'LineBreakEvent
862 'break-permission 'force)
863 (make-music 'PageBreakEvent
864 'break-permission 'force)
865 (make-music 'PageTurnEvent
866 'break-permission 'force))))
869 #(define-void-function (parser location voice-ids music) (list? ly:music?)
870 (_i "Define parallel music sequences, separated by '|' (bar check signs),
871 and assign them to the identifiers provided in @var{voice-ids}.
873 @var{voice-ids}: a list of music identifiers (symbols containing only letters)
875 @var{music}: a music sequence, containing BarChecks as limiting expressions.
880 \\parallelMusic #'(A B C) {
890 (define (bar-check? m)
891 "Checks whether m is a bar check."
892 (eq? (ly:music-property m 'name) 'BarCheck))
893 (define (recurse-and-split music)
894 "This returns either a list of music split along barchecks, or
896 (let ((elt (ly:music-property music 'element))
897 (elts (ly:music-property music 'elements)))
898 (cond ((ly:music? elt)
899 (let ((lst (recurse-and-split elt)))
903 (let ((res (music-clone music 'element x)))
904 (if (ly:input-location?
905 (ly:music-property x 'origin))
906 (set! (ly:music-property res 'origin)
907 (ly:music-property x 'origin)))
910 ((any bar-check? elts)
911 (let* ((voices (apply circular-list
912 (make-list (length voice-ids)
914 (current-voices voices)
915 (current-sequence '()))
918 (define (push-music m)
919 "Push the music expression into the current sequence"
920 (set! current-sequence (cons m current-sequence)))
921 (define (change-voice)
922 "Stores the previously built sequence into the current voice and
923 change to the following voice."
924 (set-car! current-voices
925 (cons (reverse! current-sequence)
926 (car current-voices)))
927 (set! current-sequence '())
928 (set! current-voices (cdr current-voices)))
929 (for-each (lambda (m)
930 (let ((split? (recurse-and-split m)))
939 (if (bar-check? m) (change-voice))))))
941 (if (pair? current-sequence) (change-voice))
942 ;; un-circularize `voices' and reorder the voices
944 (set! voices (map reverse!
945 (list-head voices (length voice-ids))))
947 ;; check sequence length
948 (apply for-each (lambda seqs
949 (define (seq-len seq)
950 (reduce ly:moment-add
952 (map ly:music-length seq)))
953 (let ((moment-reference (seq-len (car seqs))))
954 (for-each (lambda (seq)
955 (if (not (equal? (seq-len seq)
961 (_ "Bars in parallel music don't have the same length"))))
966 (set! lst (concatenate! lst))
967 (let ((res (music-clone music 'elements lst)))
969 (ly:input-location? (ly:music-property
972 (set! (ly:music-property res 'origin)
973 (ly:music-property (car lst) 'origin)))
977 (let ((voices (recurse-and-split music)))
980 ;; bind voice identifiers to the voices
981 (for-each (lambda (voice-id voice)
982 (ly:parser-define! parser voice-id voice))
984 (ly:music-warning music
985 (_ "ignoring parallel music without barchecks")))))
988 #(define-music-function (parser loc arg) (ly:music?)
989 (_i "Tag @var{arg} to be parenthesized.")
991 (if (memq 'event-chord (ly:music-property arg 'types))
992 ;; arg is an EventChord -> set the parenthesize property
993 ;; on all child notes and rests
996 (if (or (memq 'note-event (ly:music-property ev 'types))
997 (memq 'rest-event (ly:music-property ev 'types)))
998 (set! (ly:music-property ev 'parenthesize) #t)))
999 (ly:music-property arg 'elements))
1000 ;; No chord, simply set property for this expression:
1001 (set! (ly:music-property arg 'parenthesize) #t))
1005 #(define-music-function (parser location part1 part2) (ly:music? ly:music?)
1006 (_i "Take the music in @var{part1} and @var{part2} and typeset so
1007 that they share a staff.")
1008 (make-part-combine-music parser
1009 (list part1 part2) #f))
1012 #(define-music-function (parser location part1 part2) (ly:music? ly:music?)
1013 (_i "Take the music in @var{part1} and @var{part2} and typeset so
1014 that they share a staff with stems directed upward.")
1015 (make-part-combine-music parser
1016 (list part1 part2) UP))
1019 #(define-music-function (parser location part1 part2) (ly:music? ly:music?)
1020 (_i "Take the music in @var{part1} and @var{part2} and typeset so
1021 that they share a staff with stems directed downward.")
1022 (make-part-combine-music parser
1023 (list part1 part2) DOWN))
1026 #(define-music-function (location parser type once) (symbol-or-boolean? boolean?)
1027 (_i "Override the part-combiner.")
1028 (make-music 'EventChord
1029 'elements (list (make-music 'PartCombineForceEvent
1032 partcombineApart = \partcombineForce #'apart ##f
1033 partcombineApartOnce = \partcombineForce #'apart ##t
1034 partcombineChords = \partcombineForce #'chords ##f
1035 partcombineChordsOnce = \partcombineForce #'chords ##t
1036 partcombineUnisono = \partcombineForce #'unisono ##f
1037 partcombineUnisonoOnce = \partcombineForce #'unisono ##t
1038 partcombineSoloI = \partcombineForce #'solo1 ##f
1039 partcombineSoloIOnce = \partcombineForce #'solo1 ##t
1040 partcombineSoloII = \partcombineForce #'solo2 ##f
1041 partcombineSoloIIOnce = \partcombineForce #'solo2 ##t
1042 partcombineAutomatic = \partcombineForce ##f ##f
1043 partcombineAutomaticOnce = \partcombineForce ##f ##t
1046 #(define-music-function (parser location dur) (ly:duration?)
1047 (_i "Make a partial measure.")
1049 ;; We use `descend-to-context' here instead of `context-spec-music' to
1050 ;; ensure \partial still works if the Timing_translator is moved
1052 (context-spec-music (make-music 'PartialSet
1059 #(define-music-function
1060 (parser location main-note secondary-note)
1061 (ly:music? ly:music?)
1062 (_i "Print a trill with @var{main-note} as the main note of the trill and
1063 print @var{secondary-note} as a stemless note head in parentheses.")
1064 (let* ((get-notes (lambda (ev-chord)
1065 (extract-named-music ev-chord 'NoteEvent)))
1066 (sec-note-events (get-notes secondary-note))
1067 (trill-events (extract-named-music main-note 'TrillSpanEvent)))
1068 (if (pair? sec-note-events)
1070 (let* ((trill-pitch (ly:music-property (car sec-note-events) 'pitch))
1071 (forced (ly:music-property (car sec-note-events) 'force-accidental)))
1073 (if (ly:pitch? trill-pitch)
1074 (for-each (lambda (m)
1075 (ly:music-set-property! m 'pitch trill-pitch)) trill-events)
1077 (ly:input-warning location (_ "Second argument of \\pitchedTrill should be single note: "))
1078 (display sec-note-events)))
1081 (for-each (lambda (m)
1082 (ly:music-set-property! m 'force-accidental forced))
1087 #(define-music-function (parser location tag more music)
1088 (symbol? ly:music? ly:music?)
1089 (_i "Add @var{more} to the front of @code{elements} of all music
1090 expressions in @var{music} that are tagged with @var{tag}.")
1091 (music-map (lambda (m)
1092 (if (memq tag (ly:music-property m 'tags))
1093 (set! (ly:music-property m 'elements)
1094 (cons more (ly:music-property m 'elements))))
1099 #(define-music-function (parser location what main-music) (string? ly:music?)
1100 (_i "Indicate a section of music to be quoted. @var{what} indicates the name
1101 of the quoted voice, as specified in an @code{\\addQuote} command.
1102 @var{main-music} is used to indicate the length of music to be quoted;
1103 usually contains spacers or multi-measure rests.")
1104 (make-music 'QuoteMusic
1106 'quoted-music-name what))
1109 #(define-music-function (parser location pitch music)
1110 ((ly:pitch?) ly:music?)
1111 (_i "Make @var{music} relative to @var{pitch}. If @var{pitch} is
1112 omitted, the first note in @var{music} is given in absolute pitch.")
1113 ;; When \relative has no clear decision (can only happen with
1114 ;; scales with an even number of steps), it goes down (see
1115 ;; pitch.cc). The following formula puts out f for both the normal
1116 ;; 7-step scale as well as for a "shortened" scale missing the
1117 ;; final b. In either case, a first note of c will end up as c,
1118 ;; namely pitch (-1, 0, 0).
1119 (ly:make-music-relative! music
1124 ;; size of current scale:
1125 (ly:pitch-steps (ly:make-pitch 1 0))
1127 (make-music 'RelativeOctaveMusic
1131 #(define-music-function (parser location tag music)
1132 (symbol-list-or-symbol? ly:music?)
1133 (_i "Remove elements of @var{music} that are tagged with one of the
1134 tags in @var{tag}. @var{tag} may be either a single symbol or a list
1139 (not (memq tag (ly:music-property m 'tags))))
1141 (let ((music-tags (ly:music-property m 'tags)))
1142 (or (null? music-tags)
1143 (not (any (lambda (t) (memq t music-tags)) tag))))))
1146 resetRelativeOctave =
1147 #(define-music-function (parser location pitch) (ly:pitch?)
1148 (_i "Set the octave inside a \\relative section.")
1150 (make-music 'SequentialMusic
1151 'to-relative-callback
1152 (lambda (music last-pitch) pitch)))
1155 #(define-music-function (parser location music)
1157 (_i "Return @var{music} in reverse order.")
1158 (retrograde-music music))
1160 revertTimeSignatureSettings =
1161 #(define-music-function
1162 (parser location time-signature)
1165 (_i "Revert @code{timeSignatureSettings}
1166 for time signatures of @var{time-signature}.")
1167 (revert-time-signature-setting time-signature))
1170 #(define-event-function (parser location finger) (number-or-markup?)
1171 (_i "Apply @var{finger} as a fingering indication.")
1175 (if (number? finger) 'digit 'text)
1179 #(define-music-function (parser location fraction music)
1180 (fraction? ly:music?)
1181 (_i "Multiply the duration of events in @var{music} by @var{fraction}.")
1182 (ly:music-compress music
1183 (ly:make-moment (car fraction) (cdr fraction))))
1186 #(define-scheme-function (parser location ctx music)
1187 ((symbol?) ly:music?)
1188 (_i "Take the layout instruction events from @var{music}, optionally
1189 restricted to those applying to context type @var{ctx}, and return
1190 a context modification duplicating their effect.")
1191 (let ((mods (ly:make-context-mod)))
1193 (if (music-is-of-type? m 'layout-instruction-event)
1196 (case (ly:music-property m 'name)
1199 (ly:music-property m 'symbol)
1200 (ly:music-property m 'value)))
1203 (ly:music-property m 'symbol)))
1206 (ly:music-property m 'symbol)
1207 (ly:music-property m 'grob-value)
1209 ((ly:music-property m 'grob-property #f) => list)
1211 (ly:music-property m 'grob-property-path)))))
1214 (ly:music-property m 'symbol)
1216 ((ly:music-property m 'grob-property #f) => list)
1218 (ly:music-property m 'grob-property-path)))))))
1219 (case (ly:music-property m 'name)
1221 (ly:add-context-mod mods
1223 (ly:music-property m 'procedure))))
1224 ((ContextSpeccedMusic)
1226 (eq? ctx (ly:music-property m 'context-type)))
1227 (musicop (ly:music-property m 'element))))
1229 (let ((callback (ly:music-property m 'elements-callback)))
1230 (if (procedure? callback)
1231 (for-each musicop (callback m))))))))
1236 #(define-music-function (parser location offsets item)
1237 (list? symbol-list-or-music?)
1238 (_i "Offset control-points of @var{item} by @var{offsets}. The
1239 argument is a list of number pairs or list of such lists. Each
1240 element of a pair represents an offset to one of the coordinates of a
1241 control-point. If @var{item} is a string, the result is
1242 @code{\\once\\override} for the specified grob type. If @var{item} is
1243 a music expression, the result is the same music expression with an
1244 appropriate tweak applied.")
1245 (define (shape-curve grob)
1246 (let* ((orig (ly:grob-original grob))
1247 (siblings (if (ly:spanner? grob)
1248 (ly:spanner-broken-into orig) '()))
1249 (total-found (length siblings))
1250 (function (assoc-get 'control-points
1251 (reverse (ly:grob-basic-properties grob))))
1252 (coords (function grob)))
1254 (define (offset-control-points offsets)
1258 (lambda (x y) (coord-translate x y))
1261 (define (helper sibs offs)
1263 (if (eq? (car sibs) grob)
1264 (offset-control-points (car offs))
1265 (helper (cdr sibs) (cdr offs)))
1268 ;; we work with lists of lists
1269 (if (or (null? offsets)
1270 (not (list? (car offsets))))
1271 (set! offsets (list offsets)))
1273 (if (>= total-found 2)
1274 (helper siblings offsets)
1275 (offset-control-points (car offsets)))))
1276 #{ \once \tweak control-points #shape-curve #item #})
1279 #(define-music-function (parser location dur dots arg)
1280 (integer? integer? ly:music?)
1281 (_i "Change the duration of @var{arg} by adding @var{dur} to the
1282 @code{durlog} of @var{arg} and @var{dots} to the @code{dots} of @var{arg}.")
1284 (shift-duration-log arg dur dots))
1287 #(define-music-function (parser location overrides music)
1288 (ly:music? ly:music?)
1289 (_i "Convert @var{overrides} to tweaks and apply them to @var{music}.
1290 This does not convert @code{\\revert}, @code{\\set} or @code{\\unset}.")
1291 (set! (ly:music-property music 'tweaks)
1293 (lambda (m) (eq? (ly:music-property m 'name)
1297 ((ly:music-property m 'grob-property #f) => list)
1299 (ly:music-property m 'grob-property-path)))))
1300 (acons (cons (ly:music-property m 'symbol) ;grob name
1302 p ;grob property path
1303 (car p))) ;grob property
1304 (ly:music-property m 'grob-value)
1306 (ly:music-property music 'tweaks)
1311 #(define-music-function (parser location dur) (ly:duration?)
1312 (_i "Skip forward by @var{dur}.")
1313 (make-music 'SkipMusic
1318 #(def-grace-function startSlashedGraceMusic stopSlashedGraceMusic
1319 (_i "Create slashed graces (slashes through stems, but no slur) from
1320 the following music expression"))
1323 #(define-music-function (parser location parameters) (list?)
1324 (_i "Set the system stretch, by reading the 'system-stretch property of
1325 the `parameters' assoc list.")
1327 \overrideProperty Score.NonMusicalPaperColumn.line-break-system-details
1328 #(list (cons 'alignment-extra-space (cdr (assoc 'system-stretch parameters)))
1329 (cons 'system-Y-extent (cdr (assoc 'system-Y-extent parameters))))
1333 #(define-music-function (parser location style heads music)
1334 (symbol? symbol-list-or-symbol? ly:music?)
1335 (_i "Set @var{heads} in @var{music} to @var{style}.")
1336 (style-note-heads heads style music))
1339 #(define-music-function (parser location tag music) (symbol-list-or-symbol? ly:music?)
1340 (_i "Tag the following @var{music} with @var{tag} and return the
1341 result, by adding the single symbol or symbol list @var{tag} to the
1342 @code{tags} property of @var{music}.")
1345 (ly:music-property music 'tags)
1346 ((if (symbol? tag) cons append)
1348 (ly:music-property music 'tags)))
1352 #(define-music-function (parser location music)
1354 (_i "Make any @code{\\override} in @var{music} replace an existing
1355 grob property value only temporarily, restoring the old value when a
1356 corresponding @code{\\revert} is executed. This is achieved by
1357 clearing the @samp{pop-first} property normally set on
1360 An @code{\\override}/@/@code{\\revert} sequence created by using
1361 @code{\\temporary} and @code{\\undo} on the same music containing
1362 overrides will cancel out perfectly or cause a@tie{}warning.
1364 Non-property-related music is ignored, warnings are generated for any
1365 property-changing music that isn't an @code{\\override}.")
1369 (and (or (music-is-of-type? m 'layout-instruction-event)
1370 (music-is-of-type? m 'context-specification)
1371 (music-is-of-type? m 'apply-context)
1372 (music-is-of-type? m 'time-signature-music))
1373 (case (ly:music-property m 'name)
1375 (if (ly:music-property m 'pop-first #f)
1376 (set! (ly:music-property m 'pop-first) '()))
1377 (if (ly:music-property m 'once #f)
1378 (set! (ly:music-property m 'once) '()))
1380 ((ContextSpeccedMusic)
1385 (ly:input-warning location (_ "Cannot make ~a revertible")
1386 (ly:music-property m 'name))
1393 #(define-music-function (parser location beat-structure fraction)
1394 ((number-list? '()) fraction?)
1395 (_i "Set @var{fraction} as time signature, with optional
1396 number list @var{beat-structure} before it.")
1397 (make-music 'TimeSignatureMusic
1398 'numerator (car fraction)
1399 'denominator (cdr fraction)
1400 'beat-structure beat-structure))
1403 #(define-music-function (parser location fraction music)
1404 (fraction? ly:music?)
1405 (_i "Scale @var{music} in time by @var{fraction}.")
1406 (make-music 'TimeScaledMusic
1407 'element (ly:music-compress music (ly:make-moment (car fraction) (cdr fraction)))
1408 'numerator (car fraction)
1409 'denominator (cdr fraction)))
1412 #(define-music-function
1413 (parser location from to music)
1414 (ly:pitch? ly:pitch? ly:music?)
1416 (_i "Transpose @var{music} from pitch @var{from} to pitch @var{to}.")
1417 (make-music 'TransposedMusic
1418 'element (ly:music-transpose music (ly:pitch-diff to from))))
1420 transposedCueDuring =
1421 #(define-music-function
1422 (parser location what dir pitch main-music)
1423 (string? ly:dir? ly:pitch? ly:music?)
1425 (_i "Insert notes from the part @var{what} into a voice called @code{cue},
1426 using the transposition defined by @var{pitch}. This happens
1427 simultaneously with @var{main-music}, which is usually a rest. The
1428 argument @var{dir} determines whether the cue notes should be notated
1429 as a first or second voice.")
1431 (make-music 'QuoteMusic
1433 'quoted-context-type 'CueVoice
1434 'quoted-context-id "cue"
1435 'quoted-music-name what
1436 'quoted-voice-direction dir
1437 ;; following is inverse of instrumentTransposition for
1438 ;; historical reasons
1439 'quoted-transposition pitch))
1442 #(define-music-function (parser location pitch) (ly:pitch?)
1443 (_i "Set instrument transposition")
1446 (make-property-set 'instrumentTransposition pitch)
1450 #(define-music-function (parser location ratio tuplet-span music)
1451 (fraction? (ly:duration? '()) ly:music?)
1452 (_i "Scale the given @var{music} to tuplets. @var{ratio} is a
1453 fraction that specifies how many notes are played in place of the
1454 nominal value: it will be @samp{3/2} for triplets, namely three notes
1455 being played in place of two. If the optional duration
1456 @var{tuplet-span} is specified, it is used instead of
1457 @code{tupletSpannerDuration} for grouping the tuplets.
1460 \\tuplet 3/2 4 @{ c8 c c c c c @}
1462 will result in two groups of three tuplets, each group lasting for a
1464 (make-music 'TimeScaledMusic
1465 'element (ly:music-compress
1467 (ly:make-moment (cdr ratio) (car ratio)))
1468 'numerator (cdr ratio)
1469 'denominator (car ratio)
1470 'duration tuplet-span))
1473 #(define-music-function (parser location tuplet-span)
1475 (_i "Set @code{tupletSpannerDuration}, the length into which
1476 @code{\\tuplet} without an explicit @samp{tuplet-span} argument of its
1477 own will group its tuplets, to the duration @var{tuplet-span}. To
1478 revert to the default of not subdividing the contents of a @code{\\tuplet}
1479 command without explicit @samp{tuplet-span}, use
1481 \\tupletSpan \\default
1485 #{ \set tupletSpannerDuration = #(ly:duration-length tuplet-span) #}
1486 #{ \unset tupletSpannerDuration #}))
1489 #(define-music-function (parser location prop value item)
1490 (symbol-list-or-symbol? scheme? symbol-list-or-music?)
1491 (_i "Add a tweak to the following @var{item}, usually music.
1492 Layout objects created by @var{item} get their property @var{prop}
1493 set to @var{value}. If @var{prop} has the form @samp{Grob.property}, like with
1495 \\tweak Accidental.color #red cis'
1497 an indirectly created grob (@samp{Accidental} is caused by
1498 @samp{NoteHead}) can be tweaked; otherwise only directly created grobs
1501 As a special case, @var{item} may be a symbol list specifying a grob
1502 path, in which case @code{\\override} is called on it instead of
1503 creating tweaked music. This is mainly useful when using
1504 @code{\\tweak} as as a component for building other functions.
1506 If this use case would call for @code{\\once \\override} rather than a
1507 plain @code{\\override}, writing @code{\\once \\tweak @dots{}} can be
1510 @var{prop} can contain additional elements in which case a nested
1511 property (inside of an alist) is tweaked.")
1512 (if (ly:music? item)
1513 (let ((p (check-grob-path prop parser location
1518 (set! (ly:music-property item 'tweaks)
1519 (acons (cond ((pair? (cddr p)) p)
1521 (cons (car p) (cadr p)))
1524 (ly:music-property item 'tweaks))))
1526 ;; We could just throw this at \override and let it sort this
1527 ;; out on its own, but this way we should get better error
1529 (let ((p (check-grob-path
1530 (append item (if (symbol? prop) (list prop) prop))
1532 #:default 'Bottom #:min 3)))
1534 #{ \override #p = #value #}
1535 (make-music 'Music)))))
1538 #(define-music-function (parser location music)
1540 (_i "Convert @code{\\override} and @code{\\set} in @var{music} to
1541 @code{\\revert} and @code{\\unset}, respectively. Any reverts and
1542 unsets already in @var{music} cause a warning. Non-property-related music is ignored.")
1549 (lambda (m) (or (music-is-of-type? m 'layout-instruction-event)
1550 (music-is-of-type? m 'context-specification)
1551 (music-is-of-type? m 'apply-context)
1552 (music-is-of-type? m 'time-signature-music)))
1553 (lambda (m overrides)
1554 (case (ly:music-property m 'name)
1557 (make-music 'RevertProperty
1558 'symbol (ly:music-property m 'symbol)
1561 ((ly:music-property m 'grob-property #f) => list)
1563 (ly:music-property m 'grob-property-path))))
1567 (make-music 'PropertyUnset
1568 'symbol (ly:music-property m 'symbol))
1570 ((ContextSpeccedMusic)
1572 (make-music 'ContextSpeccedMusic
1573 'element (loop (ly:music-property m 'element))
1574 'context-type (ly:music-property m 'context-type))
1579 (ly:input-warning location (_ "Cannot revert ~a")
1580 (ly:music-property m 'name))
1586 ((null? lst) (make-music 'Music))
1587 ((null? (cdr lst)) (car lst))
1588 (else (make-sequential-music lst))))))
1591 #(define-music-function (parser location music) (ly:music?)
1592 (_i "Force any @code{\\repeat volta}, @code{\\repeat tremolo} or
1593 @code{\\repeat percent} commands in @var{music} to be interpreted
1594 as @code{\\repeat unfold}.")
1595 (unfold-repeats music))
1598 #(define-void-function (parser location arg) (scheme?)
1599 (_i "Accept a scheme argument, return a void expression.
1600 Use this if you want to have a scheme expression evaluated
1601 because of its side-effects, but its value ignored."))
1604 #(define-music-function (parser location sym val music)
1605 (symbol? scheme? ly:music?)
1606 (_i "Set @var{sym} to @var{val} in @var{music}.")
1608 (set! (ly:music-property music sym) val)