Re: Scheme function problems

[Jan Nieuwenhuizen]

Kieren Richard MacMillan writes:

> Hello, all --
>
> Can anyone tell me why the code
>
> returns
>
> ERROR: Wrong type (expecting real number): lilyvartmpa

$padding is used inside a quoted list, but it should be unquoted.  Try

    barpadding = #(define-music-function (parser location padding music)
                   (number? ly:music?)
            #{
                    \once \override Score.BarLine #'space-alist =
                    #`((first-note extra-space . ,$padding))
                    $music
            #}
    )
    { c'1 \barpadding #32 { c' c' } c' }

The error message is horrible; programmers who implement constant
error messages should consider a career switch.

Jan.

-- 
Jan Nieuwenhuizen <address@hidden> | GNU LilyPond - The music typesetter
http://www.xs4all.nl/~jantien       | http://www.lilypond.org