> What about an :after or :before method on update-instance-for-redefined-class?
It is called once for each instance, but we want update once per class. But we can hook make-instances-obsolete GF which is called once for class. > But maybe your idea works. Hooking compute-slots definitely works for derived slots. (I had to rewrite some code, though.) As for schema stuff, I'm not quite sure what we're trying to achieve, so I need to look into this some more. (E.g. as Ian suggested look through the whole schema thing.) > Or look at what is in Closer-MOP, or even use it. I've asked this question on comp.lang.lisp and got some attention from Pascal Costanza, Closer-MOP's author; so I hope he explains how to do this correctly. _______________________________________________ elephant-devel site list elephant-devel@common-lisp.net http://common-lisp.net/mailman/listinfo/elephant-devel
