There's a `post-event?` predicate defined in
scm/define-music-display-methods.scm. I don't think that one's easily
accessible outside that module, but you can copy it:
(define (post-event? m)
(music-is-of-type? m 'post-event))
On 04/20/17 16:59, Simon Albrecht wrote:
Hello,
I currently use this implementation of the \after function:
after =
#(define-music-function (t e m) (ly:duration? ly:music? ly:music?)
#{
\context Bottom <<
#m
{ \skip $t <> -\tweak extra-spacing-width #empty-interval $e }
>>
#})
Unfortunately, it doesn’t allow using it with e.g. \tempo expressions,
since it expects a post-event. So I need the music function to do
different things depending on whether the second argument is a
post-event or not. How could one implement a ‘post-event?’ predicate?
Best, Simon
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