On 11.12.2015 13:49, David Kastrup wrote:
Simon Albrecht<[email protected]>  writes:

>Hello,
>
>the bare durations that can now be used to write notes with
>unspecified pitch don’t work as music function arguments:
>
>\version "2.19.32"
>\new DrumStaff \with {
>   \override StaffSymbol.line-count = 1
>} \new DrumVoice {
>   4 \slashedGrace 16 4
>}
>\relative {
>   r4 r8 c'' \appoggiatura 4 b2
>}
>
>– each yielding ‘error: wrong type for argument 1.  Expecting music,
>found 16’ or similar.
>
>David, is that intentional?
Quite so.  From lilypond-changes.info:

    • Isolated durations in music sequences now stand for unpitched
      notes.  This may be useful for specifying rhythms to music or
      scheme functions.

"Isolated durations in music sequences".  You can place { } to make a
sequence.  Telling different types of music function arguments apart is
tricky enough as it stands.

I see. That’s fine – the {} also aid humans’ reading.

Yours, Simon


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