Re: A few questions regarding markup

[Reinhold Kainhofer]

Am Sonntag, 15. November 2009 20:16:51 schrieb Nicolas Sceaux:
> Le 14 nov. 2009 à 09:29, David Kastrup a écrit :
> > Now the harp-pedal command defines the property signature
> >
> >  ((size 1.0)
> >   (harp-pedal-details)
> >   (thickness 0.5))
> >
> > So far, so fine.  It
> > then calls make-harp-pedal without passing it those let-bound
> > variables.  As far as I understand Scheme and its closures, this means
> > that the defaults specified in this manner are ignored.

I wrote that code, and I have to admit that I don't understand this part at 
all. I simply copied code from somewhere else and tweaked it so that it 
worked....

> > make-harp-pedal then starts off with
> >
> >  (let* ((size (chain-assoc-get 'size props 1.2))
> >        (details (chain-assoc-get 'harp-pedal-details props '()))
> 
> Just remove the useless binding of `size' in the let form,
> and give the appropriate default in the property argument.

Ah, interesting... So, in the make-harp-pedal function, the properties defined 
in the harp-pedal markup function are available? That's cool!

Cheers,
Reinhold

-- 
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Reinhold Kainhofer, address@hidden, http://reinhold.kainhofer.com/
 * Financial & Actuarial Math., Vienna Univ. of Technology, Austria
 * http://www.fam.tuwien.ac.at/, DVR: 0005886
 * LilyPond, Music typesetting, http://www.lilypond.org