scheme function with string

[Gianmaria Lari]

I have this simple scheme substitution function

myFin = #(define-music-function (m) (ly:music?)
#{ \addStringNumber \addFingering $m "1x2x" "x3x4" #}
)


It simply adds some fingering and string numbers on the musical expression
argument m. I use like this:

\myFin {a b c' d'}


I would like to modify "myFin" function adding two more string parameters
so that I can pass the fingering strings. In the end I would like to be
able to write

\myFin {a b c' d' "1x2x" "x3x4" }


How can I do it?
Thank you, g.

[David Kastrup]

Post by Gianmaria Lari
I have this simple scheme substitution function
myFin = #(define-music-function (m) (ly:music?)
#{ \addStringNumber \addFingering $m "1x2x" "x3x4" #}
)
It simply adds some fingering and string numbers on the musical expression
\myFin {a b c' d'}
I would like to modify "myFin" function adding two more string parameters
so that I can pass the fingering strings. In the end I would like to be
able to write
\myFin {a b c' d' "1x2x" "x3x4" }
How can I do it?

You can't because {a b c' d' "1x2x" "x3x4" } is not valid input
in any mode (possibly lyricsmode but it would be really tricky to turn
that into something useful).

You could try for

\myFin {a b c' d'} "1x2x" "x3x4"

instead which is obviously done using

myFin = #(define-music-function (m a b) (ly:music? string? string?)
#{ \addStringNumber \addFingering $m #a #b #}
)

[Gianmaria Lari]

Post by Gianmaria Lari

Post by Gianmaria Lari
I have this simple scheme substitution function
myFin = #(define-music-function (m) (ly:music?)
#{ \addStringNumber \addFingering $m "1x2x" "x3x4" #}
)
It simply adds some fingering and string numbers on the musical

expression

Post by Gianmaria Lari
\myFin {a b c' d'}
I would like to modify "myFin" function adding two more string parameters
so that I can pass the fingering strings. In the end I would like to be
able to write
\myFin {a b c' d' "1x2x" "x3x4" }
How can I do it?

You can't because {a b c' d' "1x2x" "x3x4" } is not valid input

[....]

Sure, sure! It was just a mistake!! Of course I didn't intend to put the
strings inside the brackets.

Post by Gianmaria Lari
You could try for
\myFin {a b c' d'} "1x2x" "x3x4"

exactly :)

Post by Gianmaria Lari
instead which is obviously done using
myFin = #(define-music-function (m a b) (ly:music? string? string?)
#{ \addStringNumber \addFingering $m #a #b #}
)

Yes it is obvious also for me. But beside the previous error I probably
forgot two or three others insignificant details :) and as usual the
Lilypond log was not enough for me.

Thank you David
g.