Re: Extract notes within music function

[Gilles]

> Is it possible to extract individual notes from the music passed to a  
> music function, e.g.:
> \myFunction { c d e f }
> Within myFunction, can I do something like
> car notes
> cdr notes

Here is a kind of template, but i am not absolutely sure it's what you  
want.

%%%%%%%%%%%%%%%%%%%%

myFunction = #(define-music-function (parser location music)(ly:music?)
 (map-some-music
    (lambda (evt)
      (let ((name (ly:music-property evt 'name)))
        (cond
          ((eq? name 'EventChord)
             ; to see the structure of a chord
             (display-scheme-music evt); to comment
             ; do something with the chord
             evt) ; return the modified chord - don't go deeper
          ((eq? name 'NoteEvent)
             ; to see the structure of a note
             (display-scheme-music evt); to comment
             ; do something with note
             evt) ; return the modified note - don't go deeper
          (else #f)))) ; => #f = continue, go deeper
     music))

music  = \relative { c2->\f  <e g c>2-> }

\myFunction \music

%%%%%%%%%%%%%%%%%%%%

--
Gilles