Syntax:
remove-direct-subclass superclass subclass => unspecified
Arguments and values:
superclass -- A class metaobject.
subclass -- A class metaobject.
Description:
This generic function is called to maintain a set of backpointers from a class to its direct subclasses. It removes subclass from the set of direct subclasses of superclass. No error is signaled if subclass is not in this set.
Whenever a class is reinitialized, this generic function is called once with each deleted direct superclass of the class.
Methods:
| remove-direct-subclass (superclass class) (subclass class) |