Syntax:
update-dependent metaobject dependent &rest initargs => unspecified
Arguments and values:
metaobject -- A class or generic function metaobject. It is the metaobject being reinitialized or otherwise modified.
dependent -- An object. It is the dependent being updated.
initargs -- A list of the initialization arguments for the metaobject redefinition.
unspecified -- The return value is unspecified.
Description:
This generic function is called to update a dependent of metaobject.
When a class or a generic function is reinitialized each of its dependents is updated. The initargs argument to update-dependent is the set of initialization arguments received by reinitialize-instance.
When a method is added to a generic function, each of the generic function's dependents is updated. The initargs argument is a list of two elements: the symbol add-method, and the method that was added.
When a method is removed from a generic function, each of the generic function's dependents is updated. The initargs argument is a list of two elements: the symbol remove-method, and the method that was removed.
In each case, map-dependents is used to call update-dependent on each of the dependents. So, for example, the update of a generic function's dependents when a method is added could be performed by the following code:
(map-dependents generic-function
#'(lambda (dep)
(update-dependent generic-function
dep
'add-method
new-method)))
Methods:
There are no specified methods on this generic function.
Comments and remarks:
See the ``Dependent Maintenance Protocol'' section for remarks about the use of this facility.