Re: Format LilyMusic as string

[Jan-Peter Voigt]

Hi Urs,

I guess you are missing the wrapping lambda:

lilystring =
#(define-scheme-function (mus)(ly:music?)
   (with-output-to-string
    (lambda () #{ \displayLilyMusic #mus #})
    ))
test = \lilystring \relative { c'4 }
#(display test)

HTH
Jan-Peter

Am 24.05.2018 um 17:33 schrieb Urs Liska:
> I have a ly:music? argument and want to store the LilyPond 
> representation as a string, that is I want to have a string with the 
> content that \displayLilyMusic prints to the console.
>
>  From what I know I have to provide a port to which \displayLilyMusic's 
> output is redirected and that I can then store. But For some reason 
> (well, that includes the "conciseness" of the Guile reference manual 
> ...) I don't get it done.
>
>
> \version "2.19.80"
> #(define format-ly-music (mus)
>    (dont-know-what-to-do-here))
>
> #(define my-var (format-ly-music #{ c' #}))
>
> looks like a MWE for what I need.
>  From the reference I would have thought that call-with-output-string 
> would be what I need, but I don't get it to work as it complains about 
> the "unspecified" argument.
>
> Any pointers?
> Thanks in advance
> Urs
>
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