Re: Instanciable scheme engraver (issue216066)

[Nicolas Sceaux]

Le 28 févr. 2010 à 17:11, Han-Wen Nienhuys a écrit :

> On Sun, Feb 28, 2010 at 12:48 PM, Nicolas Sceaux
> <address@hidden> wrote:
> 
>>> On Sun, Feb 21, 2010 at 7:10 AM,  <address@hidden> wrote:
>>>> This is a proof-of-concept for instanciable scheme engravers, with
>>>> private instance slots.
>>> 
>>> Looks OK to me; maybe you'd want to pass in the context into the
>>> function, so it can do additional switching based on properties?
>> 
>> Isn't the context accessible through the translator argument of
>> e.g. the initialize function?
>> 
>>  (initialize . ,(lambda (translator)
>>                   (let ((context (ly:translator-context translator)))
>>                     ...
> 
> Right, but at that point the alist (and the other functions as well)
> are already constructed?  Maybe you would want to switch earlier.

Right, anyway, "ça ne mange pas de pain" (as we say in French,
literally: it does not eat bread).

I've uploaded another patchset, which shows in particular how the
ambitus engraver may be implemented in scheme, after adding a few
scheme callbacks.

  <http://codereview.appspot.com/216066>

(allthough scheme-engraver-ambitus.ly would not be a regression test,
but rather an example, but I don't where such things go these days).

Nicolas