- **summary**: Add support for isolated durations as an expression (ly:music?)
--> Accept isolated durations as music function arguments
- Description has changed:
Diff:
~~~~
--- old
+++ new
@@ -4,27 +4,7 @@
> % create functions expecting either music or isolated durations with an
> % arbitrary number of post events.
> % http://lists.gnu.org/archive/html/lilypond-user/2016-02/msg00478.html
->
-> \version "2.19.33"
->
-> tieFixSlash = #(define-music-function (parser location rhythm tie)
-> (ly:duration? ly:event?)
-> #{
-> \shape #'((0.5 . 0) (0.5 . 0) (0.8 . 0) (0.8 . 0)) Tie
-> $rhythm $tie
-> \once \override TieColumn.tie-configuration = #'((2 . 1))
-> #})
->
-> \new Voice \with {
-> \consists "Pitch_squash_engraver"
-> } {
-> \improvisationOn
-> \tieFixSlash 4~ 4 \tieFixSlash 4(~ 4)
-> }
->
-> _______________________________________________
-> bug-lilypond mailing list
-> [email protected]
-> https://lists.gnu.org/mailman/listinfo/bug-lilypond
->
->
+
+Example code not quoted: it demonstrated a limitedly useful circumvention
rather than the problem. One straightforward fix would be to provide for
supporting an `event-list?` predicate that would then deliver an
arbitrary-length (including zero) list of post-events. Another somewhat more
cumbersome way would be to allow the PostEvents container music type (used in
some restricted manners inside of the parser) to package multiple events also
for post-event function arguments. However, that would likely complicate
matters for the user since it might make that music event pop up in a number of
places where it's never seen before.
+
+For better or worse, this issue here is only about allowing bare rhythmic
durations, previously allowed only inside of music sequences, as proper
function arguments.
~~~~
- **status**: New --> Started
- **assigned_to**: David Kastrup
---
** [issues:#4779] Accept isolated durations as music function arguments**
**Status:** Started
**Created:** Sun Feb 21, 2016 08:59 PM UTC by pkx166h
**Last Updated:** Sun Feb 21, 2016 08:59 PM UTC
**Owner:** David Kastrup
On 19/02/16 03:11, Peter Crighton wrote:
> % As discussed on the User mailing list, isolated durations are currently not
> % accepted as expressions of type ly:music?, thus making it impossible to
> % create functions expecting either music or isolated durations with an
> % arbitrary number of post events.
> % http://lists.gnu.org/archive/html/lilypond-user/2016-02/msg00478.html
Example code not quoted: it demonstrated a limitedly useful circumvention
rather than the problem. One straightforward fix would be to provide for
supporting an `event-list?` predicate that would then deliver an
arbitrary-length (including zero) list of post-events. Another somewhat more
cumbersome way would be to allow the PostEvents container music type (used in
some restricted manners inside of the parser) to package multiple events also
for post-event function arguments. However, that would likely complicate
matters for the user since it might make that music event pop up in a number of
places where it's never seen before.
For better or worse, this issue here is only about allowing bare rhythmic
durations, previously allowed only inside of music sequences, as proper
function arguments.
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