From: Jeremy Henty <jeremy@...>
Date: 2006-11-20T06:40:07+09:00
Subject: Is there a hook that is called whenever an instance variable is assigned?

I'm developing an editing application with full undo/redo, so my
objects must log all changes to a history that can be rolled backwards
and forwards.  This is just crying out for some fancy metaprogramming,
and it would be really neat if I could insert some code that is called
whenever an object assigns an instance variable.  Is there anything
like that?

Regards, 

Jeremy Henty