[Bese-devel] allegro mop compatibility

[Gary King]

Hi Nathan,

I'd suggest building on Pascal Costanza's excellent Closer to MOP  
project. It might also make sense to use my moptilities (which does  
rely on Pascal's package). His package is at http://common-lisp.net/ 
project/closer/closer-mop.html; mine is at http://common-lisp.net/ 
project/cl-containers/moptilities/ .

regards,


On Mar 31, 2006, at 11:22 AM, Nathan Bird wrote:

> I finally traced down an error I was having, same one documented  
> at: http://paste.lisp.org/display/15624
>
>
>
> It’s happening because it is trying to query the class-slots of a  
> class that isn’t finalized yet. The classes are finalizable, but  
> apparently allegro doesn’t do this until you actually make- 
> instance. This is apparently in line with http://www.lisp.org/mop/ 
> concepts.html.
>
>
>
> So… ?
>
>
>
> (defun mopp::safe-class-slots (class)
>
>                (unless (mopp:class-finalized-p class)
>
>                  (mopp:finalize-inheritance class))
>
>                (mopp:class-slots class))
>
>
>
> Alternative we could make mopp:class-slots do the safely wrapping  
> the implementations version.
>
>
>
> On a side note, I found the comment in arnesi:
>
> ;;;; The code pre-dates Pascal Costanza's closer-mop package. If
>
> ;;;; you're looking for a compatability layer you should probably look
>
> ;;;; there instead.
>
>
>
> I haven’t looked at the packages as a whole to much so I don’t know  
> if it would be an easy transition, but aside from the work is there  
> a reason to not start using closer? I use that package for one or  
> two other things. So it won’t really be a NEW requirement for me,  
> but it might be for others.
>
>
>
> Nathan Bird
>
>
>
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-- 
Gary Warren King
metabang.com
http://www.metabang.com/