Re: How to pass a fraction as a parameter for a Scheme function

[Ralf Mattes]

Am Dienstag, 09. Juni 2020 21:43 CEST, Paolo Prete <paolopr976@gmail.com> 
schrieb:

> Hello,
>
> I don't understand how to use a fraction as a parameter for a scheme
> function. More specifically, this gives me an error:
>
> %%%%%%%%%%%%
>
> proportionalNotationDur = #(define-music-function (parser location frac)
> (scheme?)                          #{ \set
> Score.proportionalNotationDuration = #(ly:make-moment frac) #})
> {
>   \proportionalNotationDur 1/16
>   c' c' c' c'
> }
>
> %%%%%%%%%%%%
>
> How can I fix it?

You declare the function to take a scheme value. Shouldn't that
then be passed one, i.e:

 {
   \proportionalNotationDur #1/16
   c' c' c' c'
}

> Thanks!



--
Ralf Mattes

Hochschule für Musik Freiburg
Projektleitung HISinOne
Schwarzwaldstr. 141, D-79102 Freiburg
http://www.mh-freiburg.de