/usr/share/lilypond/2.16.2/scm/ly-syntax-constructors.scm is in lilypond-data 2.16.2-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 | ;;;; This file is part of LilyPond, the GNU music typesetter.
;;;;
;;;; Copyright (C) 2006--2012 Erik Sandberg <mandolaerik@gmail.com>
;;;;
;;;; LilyPond is free software: you can redistribute it and/or modify
;;;; it under the terms of the GNU General Public License as published by
;;;; the Free Software Foundation, either version 3 of the License, or
;;;; (at your option) any later version.
;;;;
;;;; LilyPond is distributed in the hope that it will be useful,
;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;;;; GNU General Public License for more details.
;;;;
;;;; You should have received a copy of the GNU General Public License
;;;; along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
;; TODO: use separate module for syntax
;; constructors. Also create wrapper around the constructor?
(defmacro define-ly-syntax (args . body)
`(define-public ,args ,(cons 'begin body)))
;; A ly-syntax constructor takes two extra parameters, parser and
;; location. These are mainly used for reporting errors and
;; warnings. This function is a syntactic sugar which uses the
;; location arg to set the origin of the returned music object; this
;; behaviour is usually desired
(defmacro define-ly-syntax-loc (args . body)
`(define-public ,args
(let ((m ,(cons 'begin body)))
(set! (ly:music-property m 'origin) ,(third args))
m)))
;; Like define-ly-syntax-loc, but adds parser and location
;; parameters. Useful for simple constructors that don't need to
;; report errors.
(defmacro define-ly-syntax-simple (args . body)
`(define-public ,(cons* (car args)
'parser
'location
(cdr args))
(let ((m ,(cons 'begin body)))
(set! (ly:music-property m 'origin) location)
m)))
;; Music function: Apply function and check return value.
;; args are in reverse order, rest may specify additional ones
;;
;; If args is not a proper list, an error has been flagged earlier
;; and no fallback value had been available. In this case,
;; we don't call the function but rather return the general
;; fallback.
(define-ly-syntax (music-function parser loc fun args . rest)
(let* ((sig (ly:music-function-signature fun))
(pred (if (pair? (car sig)) (caar sig) (car sig)))
(good (proper-list? args))
(m (and good (apply (ly:music-function-extract fun)
parser loc (reverse! args rest)))))
(if (and good (pred m))
(begin
(if (ly:music? m)
(set! (ly:music-property m 'origin) loc))
m)
(begin
(if good
(ly:parser-error parser
(format #f (_ "~a function cannot return ~a")
(type-name pred) m)
loc))
(and (pair? (car sig)) (cdar sig))))))
(define-ly-syntax (argument-error parser location n pred arg)
(ly:parser-error
parser
(format #f
(_ "wrong type for argument ~a. Expecting ~a, found ~s")
n (type-name pred) arg)
location))
(define-ly-syntax-simple (void-music)
(make-music 'Music))
(define-ly-syntax-simple (sequential-music mlist)
(make-sequential-music mlist))
(define-ly-syntax-simple (simultaneous-music mlist)
(make-simultaneous-music mlist))
(define-ly-syntax-simple (event-chord mlist)
(make-music 'EventChord
'elements mlist))
(define-ly-syntax-simple (unrelativable-music mus)
(make-music 'UnrelativableMusic
'element mus))
(define-ly-syntax-simple (context-change type id)
(make-music 'ContextChange
'change-to-type type
'change-to-id id))
(define-ly-syntax-simple (voice-separator)
(make-music 'VoiceSeparator))
(define-ly-syntax-simple (bar-check)
(make-music 'BarCheck))
(define-ly-syntax (tempo parser location text . rest)
(let* ((unit (and (pair? rest)
(car rest)))
(count (and unit
(cadr rest)))
(range-tempo? (pair? count))
(tempo-change (make-music 'TempoChangeEvent
'origin location
'text text
'tempo-unit unit
'metronome-count count))
(tempo-set
(and unit
(context-spec-music
(make-property-set 'tempoWholesPerMinute
(ly:moment-mul
(ly:make-moment
(if range-tempo?
(round (/ (+ (car count) (cdr count))
2))
count)
1)
(ly:duration-length unit)))
'Score))))
(if tempo-set
(make-sequential-music (list tempo-change tempo-set))
tempo-change)))
(define-ly-syntax-simple (repeat type num body alts)
(make-repeat type num body alts))
(define (script-to-mmrest-text music)
"Extract @code{'direction} and @code{'text} from @var{music}, and transform
into a @code{MultiMeasureTextEvent}."
(if (memq 'script-event (ly:music-property music 'types))
(let* ((location (ly:music-property music 'origin))
(dir (ly:music-property music 'direction))
(tags (ly:music-property music 'tags))
(p (make-music 'MultiMeasureTextEvent
'origin location
'tags tags
'text (ly:music-property music 'text))))
(if (ly:dir? dir)
(set! (ly:music-property p 'direction) dir))
p)
music))
(define-ly-syntax (multi-measure-rest parser location duration articulations)
(make-music 'MultiMeasureRestMusic
'articulations (map script-to-mmrest-text articulations)
'duration duration
'origin location))
(define-ly-syntax (repetition-chord parser location duration articulations)
(make-music 'EventChord
'duration duration
'elements articulations
'origin location))
(define-ly-syntax-simple (context-specification type id ops create-new mus)
(let* ((type-sym (if (symbol? type) type (string->symbol type)))
(csm (context-spec-music mus type-sym id)))
(set! (ly:music-property csm 'property-operations) ops)
(if create-new (set! (ly:music-property csm 'create-new) #t))
csm))
(define-ly-syntax (property-operation parser location ctx music-type symbol . args)
(let* ((props (case music-type
((PropertySet) (list 'value (car args)))
((PropertyUnset) '())
((OverrideProperty) (list 'grob-value (car args)
'grob-property-path (if (list? (cadr args))
(cadr args)
(cdr args))
'pop-first #t))
((RevertProperty)
(if (list? (car args))
(list 'grob-property-path (car args))
(list 'grob-property-path args)))
(else (ly:error (_ "Invalid property operation ~a") music-type))))
(m (apply make-music music-type
'symbol symbol
'origin location
props)))
(make-music 'ContextSpeccedMusic
'element m
'context-type ctx
'origin location)))
;; TODO: It seems that this function rarely returns anything useful.
(define (get-first-context-id type mus)
"Find the name of a ContextSpeccedMusic with given type"
(let ((id (ly:music-property mus 'context-id)))
(if (and (eq? (ly:music-property mus 'type) 'ContextSpeccedMusic)
(eq? (ly:music-property mus 'context-type) type)
(string? id)
(not (string-null? id)))
id
'())))
(define unique-counter -1)
(define (get-next-unique-voice-name)
(set! unique-counter (1+ unique-counter))
(call-with-output-string (lambda (p) (format p "uniqueContext~s" unique-counter))))
(define-ly-syntax-simple (lyric-event text duration)
(make-lyric-event text duration))
(define (lyric-combine-music sync music loc)
;; CompletizeExtenderEvent is added following the last lyric in MUSIC
;; to signal to the Extender_engraver that any pending extender should
;; be completed if the lyrics end before the associated voice.
(append! (ly:music-property music 'elements)
(list (make-music 'CompletizeExtenderEvent)))
(make-music 'LyricCombineMusic
'element music
'associated-context sync
'origin loc))
(define-ly-syntax (lyric-combine parser location voice music)
(lyric-combine-music voice music location))
(define-ly-syntax (add-lyrics parser location music addlyrics-list)
(let* ((existing-voice-name (get-first-context-id 'Voice music))
(voice-name (if (string? existing-voice-name)
existing-voice-name
(get-next-unique-voice-name)))
(voice (if (string? existing-voice-name)
(music)
(make-music 'ContextSpeccedMusic
'element music
'context-type 'Voice
'context-id voice-name
'origin (ly:music-property music 'origin))))
(lyricstos (map (lambda (mus)
(let* ((loc (ly:music-property mus 'origin))
(lyr (lyric-combine-music voice-name mus loc)))
(make-music 'ContextSpeccedMusic
'create-new #t
'context-type 'Lyrics
'element lyr
'origin loc)))
addlyrics-list)))
(make-simultaneous-music (cons voice lyricstos))))
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