Re: bezier-sandwich stencil

[Han-Wen Nienhuys]

Andrzej Kopec wrote:
> I had been looking at sources before asking this question, but this hadn't 
> provided any
> solution. Also Lookup::bezier_sandwich didn't help. 
>
> I get this (or similar) from lily:
> ...
> Layout output to `scm-markup-stencil-01.ps'...
> /usr/local/share/lilypond/2.6.4/ly/init.ly:36:1: error: GUILE signaled an error 
> for the expression beginning here
> #
>  (if (pair? toplevel-scores)Wrong type to apply: (0 . 2)
>
> /usr/local/share/lilypond/2.6.4/ly/init.ly:36:5: error: syntax error, 
> unexpected '(', expecting '='
> #(if 
>      (pair? toplevel-scores)
> error: failed files: 
> "/home/snopek/moje_pliki/lilypond/test/scm-markup-stencil-01.ly"
>
> LilyPond exited abnormally with code 1 at Thu Dec  8 00:34:56
>
> Regardless of the fact I use an 8-element list or a list of 4 pairs, or a list 
> of 8 pairs,
> or anything else in list, including even strings...
>
> So: I would REALLY appreciate very much any EXAMPLE of using such statement.
> (sb. said "one picture says more than a thousand words", i'd say "one 
> example...")

It looks as if you're making mistakes with Scheme quoting. You should 
use something like

  (list 'bezier-sandwich (list 'quote '(0 . 2) '(1 . 4) ... ))

or

  '(bezier-sandwhich (quote ((0 . 2) (1 . 4) ... )))


I guess.

You need an extra quote because the expression of a stencil is evaluated 
another time in the back-end.	


--
 Han-Wen Nienhuys - address@hidden - http://www.xs4all.nl/~hanwen