X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=ly%2Fmusic-functions-init.ly;h=59a11264f7c741d84d3c854494adfd3f8cdfad2c;hb=d877b9c284c88f91a7ae03f259d6e9f57787af90;hp=c8054927b025df5ebfad68bf88f02cef14e63df9;hpb=151736d38b944c26870f4d208c77112b102b78b3;p=lilypond.git

diff --git a/ly/music-functions-init.ly b/ly/music-functions-init.ly
index c8054927b0..59a11264f7 100644
--- a/ly/music-functions-init.ly
+++ b/ly/music-functions-init.ly
@@ -2,7 +2,7 @@
 
 %%%% This file is part of LilyPond, the GNU music typesetter.
 %%%%
-%%%% Copyright (C) 2003--2011 Han-Wen Nienhuys <hanwen@xs4all.nl>
+%%%% Copyright (C) 2003--2012 Han-Wen Nienhuys <hanwen@xs4all.nl>
 %%%%                          Jan Nieuwenhuizen <janneke@gnu.org>
 %%%%
 %%%% LilyPond is free software: you can redistribute it and/or modify
@@ -18,7 +18,7 @@
 %%%% You should have received a copy of the GNU General Public License
 %%%% along with LilyPond.  If not, see <http://www.gnu.org/licenses/>.
 
-\version "2.14.0"
+\version "2.15.18"
 
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@@ -38,13 +38,13 @@ acciaccatura =
 %% keep these two together
 "instrument-definitions" = #'()
 addInstrumentDefinition =
-#(define-scheme-function
+#(define-void-function
    (parser location name lst) (string? list?)
    (_i "Create instrument @var{name} with properties @var{list}.")
    (set! instrument-definitions (acons name lst instrument-definitions)))
 
 addQuote =
-#(define-scheme-function (parser location name music) (string? ly:music?)
+#(define-void-function (parser location name music) (string? ly:music?)
    (_i "Define @var{music} as a quotable music expression named
 @var{name}")
    (add-quotable parser name music))
@@ -124,23 +124,13 @@ appoggiatura =
 assertBeamQuant =
 #(define-music-function (parser location l r) (pair? pair?)
    (_i "Testing function: check whether the beam quants @var{l} and @var{r} are correct")
-   (make-grob-property-override 'Beam 'positions
-				(ly:make-simple-closure
-				 (ly:make-simple-closure
-				  (append
-				   (list chain-grob-member-functions `(,cons 0 0))
-				   (check-quant-callbacks l r))))))
+   (make-grob-property-override 'Beam 'positions (check-quant-callbacks l r)))
 
 % for regression testing purposes.
 assertBeamSlope =
 #(define-music-function (parser location comp) (procedure?)
    (_i "Testing function: check whether the slope of the beam is the same as @code{comp}")
-   (make-grob-property-override 'Beam 'positions
-				(ly:make-simple-closure
-				 (ly:make-simple-closure
-				  (append
-				   (list chain-grob-member-functions `(,cons 0 0))
-				   (check-slope-callbacks comp))))))
+   (make-grob-property-override 'Beam 'positions (check-slope-callbacks comp)))
 
 autochange =
 #(define-music-function (parser location music) (ly:music?)
@@ -188,21 +178,21 @@ barNumberCheck =
 					 cbn n))))))
 
 bendAfter =
-#(define-music-function (parser location delta) (real?)
+#(define-event-function (parser location delta) (real?)
    (_i "Create a fall or doit of pitch interval @var{delta}.")
    (make-music 'BendAfterEvent
 	       'delta-step delta))
 
 bookOutputName =
-#(define-scheme-function (parser location newfilename) (string?)
+#(define-void-function (parser location newfilename) (string?)
    (_i "Direct output for the current book block to @var{newfilename}.")
-   (set! book-filename newfilename))
+   (set! (paper-variable parser #f 'output-filename) newfilename))
 
 bookOutputSuffix =
-#(define-scheme-function (parser location newsuffix) (string?)
+#(define-void-function (parser location newsuffix) (string?)
    (_i "Set the output filename suffix for the current book block to
 @var{newsuffix}.")
-   (set! book-output-suffix newsuffix))
+   (set! (paper-variable parser #f 'output-suffix) newsuffix))
 
 %% \breathe is defined as a music function rather than an event identifier to
 %% ensure it gets useful input location information: as an event identifier,
@@ -237,7 +227,7 @@ as @code{\\compoundMeter #'((3 2 8))} or shorter
                         (ly:moment-main-denominator mlen))))
   #{
     \once \override Staff.TimeSignature #'stencil = #(lambda (grob)
-		(grob-interpret-markup grob (format-compound-time $args)))
+		(grob-interpret-markup grob (format-compound-time args)))
     \set Timing.timeSignatureFraction = $timesig
     \set Timing.baseMoment = $beat
     \set Timing.beatStructure = $beatGrouping
@@ -303,13 +293,11 @@ endSpanners =
 #(define-music-function (parser location music) (ly:music?)
    (_i "Terminate the next spanner prematurely after exactly one note
 without the need of a specific end spanner.")
-   (if (eq? (ly:music-property music 'name) 'EventChord)
-       (let* ((elts (ly:music-property music 'elements))
-	      (start-span-evs (filter (lambda (ev)
-					(and (music-has-type ev 'span-event)
-					     (equal? (ly:music-property ev 'span-direction)
-						     START)))
-				      elts))
+   (if (memq (ly:music-property music 'name) '(EventChord NoteEvent))
+       (let* ((start-span-evs (filter (lambda (ev)
+					(equal? (ly:music-property ev 'span-direction)
+						START))
+				      (extract-typed-music music 'span-event)))
 	      (stop-span-evs
 	       (map (lambda (m)
 		      (let ((c (music-clone m)))
@@ -323,9 +311,16 @@ without the need of a specific end spanner.")
 						 end-ev-chord))))
 	 total)
 
-       (ly:input-message location (_ "argument endSpanners is not an EventChord: ~a" music))))
-
+       (begin
+	 (ly:input-message location (_ "argument endSpanners is not an EventChord: ~a") music)
+	 music)))
 
+eventChords =
+#(define-music-function (parser location music) (ly:music?)
+   (_i "Compatibility function wrapping @code{EventChord} around
+isolated rhythmic events occuring since version 2.15.28, after
+expanding repeat chords @samp{q}.")
+   (event-chord-wrap! music parser))
 
 featherDurations=
 #(define-music-function (parser location factor argument) (ly:moment? ly:music?)
@@ -333,115 +328,89 @@ featherDurations=
    (let ((orig-duration (ly:music-length argument))
 	 (multiplier (ly:make-moment 1 1)))
 
-     (music-map
+     (for-each
       (lambda (mus)
-	(if (and (eq? (ly:music-property mus 'name) 'EventChord)
-		 (< 0 (ly:moment-main-denominator (ly:music-length mus))))
+	(if (< 0 (ly:moment-main-denominator (ly:music-length mus)))
 	    (begin
 	      (ly:music-compress mus multiplier)
-	      (set! multiplier (ly:moment-mul factor multiplier))))
-	mus)
-      argument)
-
+	      (set! multiplier (ly:moment-mul factor multiplier)))))
+      (extract-named-music argument '(EventChord NoteEvent RestEvent SkipEvent)))
      (ly:music-compress
       argument
       (ly:moment-div orig-duration (ly:music-length argument)))
 
      argument))
 
-footnoteGrob =
-#(define-music-function (parser location grob-name offset text footnote)
-   (symbol? number-pair? markup? markup?)
-   (_i "Attach @var{text} to @var{grob-name} at offset @var{offset},
-with @var{text} referring to @var{footnote} (use like @code{\\once})")
-   (make-music 'FootnoteEvent
-               'automatically-numbered #f
-	       'symbol grob-name
-	       'X-offset (car offset)
-	       'Y-offset (cdr offset)
-	       'text text
-	       'footnote-text footnote))
-
-autoFootnoteGrob =
-#(define-music-function (parser location grob-name offset footnote)
-   (symbol? number-pair? markup?)
-   (_i "Footnote @var{grob-name} with the text in @var{footnote}
-allowing for the footnote to be automatically numbered such that
-the number appears at @var{offset}.  Note that, for this to take effect,
-auto-numbering must be turned on in the paper block.  Otherwise, no
-number will appear.  Use like @code{\\once})")
-   (make-music 'FootnoteEvent
-               'automatically-numbered #t
-	       'symbol grob-name
-	       'X-offset (car offset)
-	       'Y-offset (cdr offset)
-               'text (make-null-markup)
-	       'footnote-text footnote))
-
-
 footnote =
-#(define-music-function (parser location offset text footnote)
-   (number-pair? markup? markup?)
-   (_i "Attach @var{text} at @var{offset} with @var{text} referring
-to @var{footnote} (use like @code{\\tweak})")
-   (make-music 'FootnoteEvent
-               'automatically-numbered #f
-	       'X-offset (car offset)
-	       'Y-offset (cdr offset)
-	       'text text
-	       'footnote-text footnote))
-
-autoFootnote =
-#(define-music-function (parser location offset footnote)
-   (number-pair? markup?)
-   (_i "Footnote the item after which this comes with the text in
-@var{footnote} allowing for the footnote to be automatically numbered
-such that the number appears at @var{offset}.  Note that, for this to
-take effect, auto-numbering must be turned on in the paper block.
-Otherwise, no number will appear.  Use like @code{\\tweak})")
-   (make-music 'FootnoteEvent
-               'automatically-numbered #t
-	       'X-offset (car offset)
-	       'Y-offset (cdr offset)
-	       'text (make-null-markup)
-	       'footnote-text footnote))
+#(define-music-function (parser location text offset grob-name footnote)
+   ((markup?) number-pair? (symbol? '()) markup?)
+   (_i "Attach @var{text} at @var{offset} with @var{text} referring to
+@var{footnote}.  If @var{text} is given as @code{\\default}, use
+autonumbering instead.  Note that, for this to take effect,
+auto-numbering must be turned on in the paper block.  Otherwise, no
+number will appear.  Footnotes are applied like articulations.  If a
+symbol @var{grob-name} is specified, all grobs of that kind at the
+current time step are affected.")
+   (make-music
+    'FootnoteEvent
+    'X-offset (car offset)
+    'Y-offset (cdr offset)
+    'automatically-numbered (not text)
+    'text (or text (make-null-markup))
+    'footnote-text footnote
+    'symbol grob-name))
 
 grace =
 #(def-grace-function startGraceMusic stopGraceMusic
    (_i "Insert @var{music} as grace notes."))
 
+grobdescriptions =
+#(define-scheme-function (parser location descriptions) (list?)
+   (_i "Create a context modification from @var{descriptions}, a list
+in the format of @code{all-grob-descriptions}.")
+   (ly:make-context-mod
+    (map (lambda (p)
+	   (list 'assign (car p) (list (cdr p))))
+	 descriptions)))
+
 harmonicByFret = #(define-music-function (parser location fret music) (number? ly:music?)
-  (_i "Convert @var{music} into harmonics; the resulting notes resemble
-harmonics played on a fretted instrument by touching the strings above @var{fret}.")
-  (let* ((fret (number->string fret))
-         (pitch (fret->pitch fret)))
-        (make-sequential-music
-         (list
-          #{
-            \override TabNoteHead #'stencil = #(tab-note-head::print-custom-fret-label $fret)
-          #}
-          (make-harmonic
-            (calc-harmonic-pitch pitch music))
-          #{
-            \revert TabNoteHead #'stencil
-          #}))))
+  (_i "Convert @var{music} into mixed harmonics; the resulting notes resemble
+harmonics played on a fretted instrument by touching the strings at @var{fret}.")
+  #{
+    \set harmonicDots = ##t
+    \override TabNoteHead #'stencil = #(tab-note-head::print-custom-fret-label (number->string fret))
+    \override NoteHead #'Y-extent = #(ly:make-unpure-pure-container ly:grob::stencil-height
+                                       (lambda (grob start end)
+                                               (ly:grob::stencil-height grob)))
+    \override NoteHead #'stencil = #(lambda (grob) (ly:grob-set-property! grob 'style 'harmonic-mixed)
+                                            (ly:note-head::print grob))
+    $(make-harmonic
+       (calc-harmonic-pitch (fret->pitch (number->string fret)) music))
+    \unset harmonicDots
+    \revert TabNoteHead #'stencil
+    \revert NoteHead #'Y-extent
+    \revert NoteHead #'stencil
+  #})
 
 harmonicByRatio = #(define-music-function (parser location ratio music) (number? ly:music?)
-    (_i "Convert @var{music} into harmonics; the resulting notes resemble
-harmonics played on a fretted instrument by touching the strings above the point
+    (_i "Convert @var{music} into mixed harmonics; the resulting notes resemble
+harmonics played on a fretted instrument by touching the strings at the point
 given through @var{ratio}.")
-  (let ((pitch (ratio->pitch ratio))
-        (fret (ratio->fret ratio)))
-       (make-sequential-music
-        (list
-         #{
-           \override TabNoteHead #'stencil = #(tab-note-head::print-custom-fret-label $fret)
-         #}
-         (make-harmonic
-           (calc-harmonic-pitch pitch music))
-         #{
-            \revert TabNoteHead #'stencil
-         #}))))
+  #{
+    \set harmonicDots = ##t
+    \override TabNoteHead #'stencil = #(tab-note-head::print-custom-fret-label (ratio->fret ratio))
+    \override NoteHead #'Y-extent = #(ly:make-unpure-pure-container ly:grob::stencil-height
+                                       (lambda (grob start end)
+                                               (ly:grob::stencil-height grob)))
+    \override NoteHead #'stencil = #(lambda (grob) (ly:grob-set-property! grob 'style 'harmonic-mixed)
+                                            (ly:note-head::print grob))
+    $(make-harmonic
+      (calc-harmonic-pitch (ratio->pitch ratio) music))
+    \unset harmonicDots
+    \revert TabNoteHead #'stencil
+    \revert NoteHead #'Y-extent
+    \revert NoteHead #'stencil
+  #})
 
 instrumentSwitch =
 #(define-music-function
@@ -477,6 +446,23 @@ keepWithTag =
 	 res)))
     music))
 
+key =
+#(define-music-function (parser location tonic pitch-alist)
+   ((ly:pitch? '()) (list? '()))
+   (_i "Set key to @var{tonic} and scale @var{pitch-alist}.
+If both are null, just generate @code{KeyChangeEvent}.")
+   (cond ((null? tonic) (make-music 'KeyChangeEvent))
+	 ((null? pitch-alist)
+	  (ly:parser-error parser (_ "second argument must be pitch list")
+			   location)
+	  (make-music 'SequentialMusic 'void #t))
+	 (else
+	  (ly:music-transpose
+	   (make-music 'KeyChangeEvent
+		'tonic (ly:make-pitch 0 0 0)
+		'pitch-alist pitch-alist)
+	   tonic))))
+
 killCues =
 #(define-music-function (parser location music) (ly:music?)
    (_i "Remove cue notes from @var{music}.")
@@ -501,18 +487,18 @@ label =
 
 
 language =
-#(define-scheme-function (parser location language) (string?)
+#(define-void-function (parser location language) (string?)
    (_i "Set note names for language @var{language}.")
    (note-names-language parser language))
 
 languageSaveAndChange =
-#(define-scheme-function (parser location language) (string?)
+#(define-void-function (parser location language) (string?)
   (_i "Store the previous pitchnames alist, and set a new one.")
   (set! previous-pitchnames pitchnames)
   (note-names-language parser language))
 
 languageRestore =
-#(define-scheme-function (parser location) ()
+#(define-void-function (parser location) ()
    (_i "Restore a previously-saved pitchnames alist.")
    (if previous-pitchnames
        (begin
@@ -551,6 +537,22 @@ inversion =
 transpose from @var{around} to @var{to}.")
    (music-invert around to music))
 
+mark =
+#(define-music-function
+   (parser location label) ((scheme? '()))
+  "Make the music for the \\mark command."
+  (let* ((set (and (integer? label)
+		   (context-spec-music (make-property-set 'rehearsalMark label)
+				      'Score)))
+	 (ev (make-music 'MarkEvent
+			 'origin location)))
+
+    (if set
+	(make-sequential-music (list set ev))
+	(begin
+	  (set! (ly:music-property ev 'label) label)
+	  ev))))
+
 musicMap =
 #(define-music-function (parser location proc mus) (procedure? ly:music?)
    (_i "Apply @var{proc} to @var{mus} and all of the music it contains.")
@@ -586,6 +588,18 @@ octaveCheck =
    (make-music 'RelativeOctaveCheck
                'pitch pitch))
 
+once =
+#(define-music-function (parser location music) (ly:music?)
+   (_i "Set @code{once} to @code{#t} on all layout instruction events in @var{music}.")
+   (music-map
+    (lambda (m)
+      (cond ((music-is-of-type? m 'layout-instruction-event)
+	     (set! (ly:music-property m 'once) #t))
+	    ((ly:duration? (ly:music-property m 'duration))
+	     (ly:music-warning m (_ "Cannot apply \\once to timed music"))))
+      m)
+    music))
+
 ottava =
 #(define-music-function (parser location octave) (integer?)
    (_i "Set the octavation.")
@@ -666,7 +680,7 @@ pageTurn =
 					   'break-permission 'force))))
 
 parallelMusic =
-#(define-scheme-function (parser location voice-ids music) (list? ly:music?)
+#(define-void-function (parser location voice-ids music) (list? ly:music?)
    (_i "Define parallel music sequences, separated by '|' (bar check signs),
 and assign them to the identifiers provided in @var{voice-ids}.
 
@@ -689,7 +703,9 @@ Example:
 ")
    (let* ((voices (apply circular-list (make-list (length voice-ids) (list))))
 	  (current-voices voices)
-	  (current-sequence (list)))
+	  (current-sequence (list))
+	  (original music)
+	  (wrapper #f))
      ;;
      ;; utilities
      (define (push-music m)
@@ -715,12 +731,28 @@ Example:
 		       (let ((origins (remove not (map music-origin
 						       (ly:music-property music 'elements)))))
 			 (and (not (null? origins)) (car origins)))))))
+     (while (music-is-of-type? music 'music-wrapper-music)
+	    (set! wrapper music)
+	    (set! music (ly:music-property wrapper 'element)))
+     (if wrapper
+	 (set! (ly:music-property wrapper 'element)
+				  (make-music 'SequentialMusic
+					      'origin location))
+	 (set! original
+	       (make-music 'SequentialMusic
+			   'origin location)))
      ;;
      ;; first, split the music and fill in voices
-     (for-each (lambda (m)
-		     (push-music m)
-		     (if (bar-check? m) (change-voice)))
-		   (ly:music-property music 'elements))
+     ;; We flatten direct layers of SequentialMusic since they are
+     ;; pretty much impossible to avoid when writing music functions.
+     (let rec ((music music))
+       (for-each (lambda (m)
+		   (if (eq? (ly:music-property m 'name) 'SequentialMusic)
+		       (rec m)
+		       (begin
+			 (push-music m)
+			 (if (bar-check? m) (change-voice)))))
+		 (ly:music-property music 'elements)))
      (if (not (null? current-sequence)) (change-voice))
      ;; un-circularize `voices' and reorder the voices
      (set! voices (map-in-order (lambda (dummy seqs)
@@ -749,9 +781,12 @@ Example:
      ;; bind voice identifiers to the voices
      (for-each (lambda (voice-id voice)
 	    (ly:parser-define! parser voice-id
-			       (make-music 'SequentialMusic
-					   'origin location
-					   'elements voice)))
+			       (let ((v (ly:music-deep-copy original)))
+				 (set! (ly:music-property
+					(car (extract-named-music
+					      v 'SequentialMusic))
+					'elements) voice)
+				 v)))
 	  voice-ids voices)))
 
 parenthesize =
@@ -776,7 +811,21 @@ partcombine =
    (_i "Take the music in @var{part1} and @var{part2} and typeset so
 that they share a staff.")
    (make-part-combine-music parser
-                            (list part1 part2)))
+                            (list part1 part2) #f))
+
+partcombineUp =
+#(define-music-function (parser location part1 part2) (ly:music? ly:music?)
+   (_i "Take the music in @var{part1} and @var{part2} and typeset so
+that they share a staff with stems directed upward.")
+   (make-part-combine-music parser
+                            (list part1 part2) UP))
+
+partcombineDown =
+#(define-music-function (parser location part1 part2) (ly:music? ly:music?)
+   (_i "Take the music in @var{part1} and @var{part2} and typeset so
+that they share a staff with stems directed downward.")
+   (make-part-combine-music parser
+                            (list part1 part2) DOWN))
 
 partcombineForce =
 #(define-music-function (location parser type once) (symbol-or-boolean? boolean?)
@@ -818,13 +867,9 @@ pitchedTrill =
    (_i "Print a trill with @var{main-note} as the main note of the trill and
 print @var{secondary-note} as a stemless note head in parentheses.")
    (let* ((get-notes (lambda (ev-chord)
-                       (filter
-                        (lambda (m) (eq? 'NoteEvent (ly:music-property m 'name)))
-                        (ly:music-property ev-chord 'elements))))
+		       (extract-named-music ev-chord 'NoteEvent)))
           (sec-note-events (get-notes secondary-note))
-          (trill-events (filter (lambda (m) (music-has-type m 'trill-span-event))
-                                (ly:music-property main-note 'elements))))
-
+          (trill-events (extract-named-music main-note 'TrillSpanEvent)))
      (if (pair? sec-note-events)
          (begin
            (let* ((trill-pitch (ly:music-property (car sec-note-events) 'pitch))
@@ -907,7 +952,7 @@ for time signatures of @var{time-signature}.")
    (revert-time-signature-setting time-signature))
 
 rightHandFinger =
-#(define-music-function (parser location finger) (number-or-string?)
+#(define-event-function (parser location finger) (number-or-string?)
    (_i "Apply @var{finger} as a fingering indication.")
 
    (make-music
@@ -918,15 +963,60 @@ rightHandFinger =
 
 scaleDurations =
 #(define-music-function (parser location fraction music)
-   (number-pair? ly:music?)
+   (fraction? ly:music?)
    (_i "Multiply the duration of events in @var{music} by @var{fraction}.")
    (ly:music-compress music
 		      (ly:make-moment (car fraction) (cdr fraction))))
 
+settingsFrom =
+#(define-scheme-function (parser location ctx music)
+   ((symbol?) ly:music?)
+   (_i "Take the layout instruction events from @var{music}, optionally
+restricted to those applying to context type @var{ctx}, and return
+a context modification duplicating their effect.")
+   (let ((mods (ly:make-context-mod)))
+     (define (musicop m)
+       (if (music-is-of-type? m 'layout-instruction-event)
+	   (ly:add-context-mod
+	    mods
+	    (case (ly:music-property m 'name)
+	      ((PropertySet)
+	       (list 'assign
+		     (ly:music-property m 'symbol)
+		     (ly:music-property m 'value)))
+	      ((PropertyUnset)
+	       (list 'unset
+		     (ly:music-property m 'symbol)))
+	      ((OverrideProperty)
+	       (cons* 'push
+		      (ly:music-property m 'symbol)
+		      (ly:music-property m 'grob-value)
+		      (ly:music-property m 'grob-property-path)))
+	      ((RevertProperty)
+	       (cons* 'pop
+		      (ly:music-property m 'symbol)
+		      (ly:music-property m 'grob-property-path)))))
+	   (case (ly:music-property m 'name)
+	     ((ApplyContext)
+	      (ly:add-context-mod mods
+				  (list 'apply
+					(ly:music-property m 'procedure))))
+	     ((ContextSpeccedMusic)
+	      (if (or (not ctx)
+		      (eq? ctx (ly:music-property m 'context-type)))
+		  (musicop (ly:music-property m 'element))))
+	     (else
+	      (let ((callback (ly:music-property m 'elements-callback)))
+		(if (procedure? callback)
+		    (for-each musicop (callback m))))))))
+     (musicop music)
+     mods))
+
 shiftDurations =
 #(define-music-function (parser location dur dots arg)
    (integer? integer? ly:music?)
-   (_i "Scale @var{arg} up by a factor of 2^@var{dur}*(2-(1/2)^@var{dots}).")
+   (_i "Change the duration of @var{arg} by adding @var{dur} to the
+@code{durlog} of @var{arg} and @var{dots} to the @code{dots} of @var{arg}.")
 
    (music-map
     (lambda (x)
@@ -951,7 +1041,7 @@ the `parameters' assoc list.")
    #{
      \overrideProperty #"Score.NonMusicalPaperColumn"
      #'line-break-system-details
-     #$(list (cons 'alignment-extra-space (cdr (assoc 'system-stretch parameters)))
+     #(list (cons 'alignment-extra-space (cdr (assoc 'system-stretch parameters)))
 	     (cons 'system-Y-extent (cdr (assoc 'system-Y-extent parameters))))
    #})
 
@@ -961,14 +1051,6 @@ styledNoteHeads =
    (_i "Set @var{heads} in @var{music} to @var{style}.")
    (style-note-heads heads style music))
 
-
-
-tabChordRepetition =
-#(define-music-function (parser location) ()
-   (_i "Include the string information in a chord repetition.")
-   (ly:parser-set-repetition-function parser tab-repeat-chord)
-   (make-music 'SequentialMusic 'void #t))
-
 tag =
 #(define-music-function (parser location tag arg) (symbol? ly:music?)
 
@@ -980,6 +1062,25 @@ tag =
 	  (ly:music-property arg 'tags)))
    arg)
 
+time =
+#(define-music-function (parser location beat-structure fraction)
+   ((number-list? '()) fraction?)
+   (_i "Set @var{fraction} as time signature, with optional
+number list @var{beat-structure} before it.")
+  (make-music 'TimeSignatureMusic
+              'numerator (car fraction)
+              'denominator (cdr fraction)
+              'beat-structure beat-structure))
+
+times =
+#(define-music-function (parser location fraction music)
+   (fraction? ly:music?)
+   (_i "Scale @var{music} in time by @var{fraction}.")
+  (make-music 'TimeScaledMusic
+  	      'element (ly:music-compress music (ly:make-moment (car fraction) (cdr fraction)))
+  	      'numerator (car fraction)
+  	      'denominator (cdr fraction)))
+
 transpose =
 #(define-music-function
    (parser location from to music)
@@ -1041,7 +1142,11 @@ unfoldRepeats =
 as @code{\\repeat unfold}.")
    (unfold-repeats music))
 
-
+void =
+#(define-void-function (parser location arg) (scheme?)
+   (_i "Accept a scheme argument, return a void expression.
+Use this if you want to have a scheme expression evaluated
+because of its side-effects, but its value ignored."))
 
 withMusicProperty =
 #(define-music-function (parser location sym val music)