Common Lisp the Language, 2nd Edition

Next: Changing the Class Up: Redefining Classes Previous: Customizing Class Redefinition

28.1.10.4. Extensions

There are two allowed extensions to class redefinition:

• The Object System may be extended to permit the new class to be an instance of a metaclass other than the metaclass of the old class.
• The Object System may be extended to support an updating process when either the old or the new class is an instance of a class other than standard-class that is not a built-in class.

AI.Repository@cs.cmu.edu