\version "2.19.29"
"\\=" =
-#(define-event-function (id event) (number-or-string? ly:event?)
+#(define-event-function (id event) (key? ly:event?)
(_i "This sets the @code{spanner-id} property of the following
-@var{event} to the given @var{id} (numbers will be converted to a
-string). This can be used to tell LilyPond how to connect overlapping
+@var{event} to the given @var{id} (non-negative integer or symbol).
+This can be used to tell LilyPond how to connect overlapping
or parallel slurs or phrasing slurs within a single @code{Voice}.
@lilypond[quote,verbatim]
\\fixed c' { c\\=1( d\\=2( e\\=1) f\\=2) }
@end lilypond\n")
- (set! (ly:music-property event 'spanner-id)
- (if (number? id)
- (number->string id)
- id))
+ (set! (ly:music-property event 'spanner-id) id)
event)
startGroup = #(make-span-event 'NoteGroupingEvent START)