validate-superclass class superclass => generalized-boolean
Arguments and values:
class -- A class metaobject.
superclass -- A class metaobject.
generalized-boolean -- A generalized boolean.
This generic function is called to determine whether the class superclass is suitable for use as a superclass of class.
This generic function can be be called by the implementation or user code. It is called during class metaobject initialization and reinitialization, before the direct superclasses are stored. If this generic function returns false, the initialization or reinitialization will signal an error.
|validate-superclass (class class) (superclass class)|
Comments and Remarks:
Defining a method on validate-superclass requires detailed knowledge of the internal protocol followed by each of the two class metaobject classes. A method on validate-superclass which returns true for two different class metaobject classes declares that they are compatible.