Re: Getting a function to accept a string or a markup

[Lukas-Fabian Moser]

Hi Vaughan,

Am 10.05.24 um 07:44 schrieb Vaughan McAlley:
> Hi,
>
> I have a text spanner function that shows a player that they are
> playing in simultaneous rhythm with one or more other players. I
> adapted it from code I used for indicating colouration in renaissance
> music. It works fine, but if it begins on the last note of a line, and
> the attached string is long, it can extend right to the edge of the
> page (see picture attached).
>
> What would be good is to be able to say
>
> \sim \markup \left-column { "Vln 1," "Vln 2" }
>
> if needed. Otherwise I could have it require a markup and get it to
> concatenate within the function, but my Scheme skills are not up to
> this...

Strings _are_ markups! So basically, it suffices to change the function
signature to:

#(define-music-function (annotation) (markup?)

This function still accepts strings! But when you call it with an actual
non-string markup, it fails because of

(string-append mySimBeginning annotation)

since such a markup can't be handled by string functions like
string-append. So simply replace this by the corresponding scheme macro
to concatenate markups:

#:concat (mySimBeginning annotation)

Lukas