[CLOS] Ensuring a method exists
- From: Didier Verna <didier@xxxxxxxxxxxxx>
- Date: Wed, 27 Sep 2006 09:40:18 +0200
Hi !
Suppose I have:
(defgeneric foo (a b) ...)
(defclass base () ...)
(defmethod foo ((a base) (b base)) ...)
I'd like to ensure that if somebody writes a derived class:
(defclass derived (base) ...)
she also provides a method for this class:
(defmethod foo ((a derived) (b derived)) ...)
I'd be happy with a dynamic solution. Perhaps, the method combination would
check that the first applicable method matches exactly the class of the
arguments. But I know nothing about the MOP yet ...
Thanks !
--
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94276 Le Kremlin-Bicêtre, France Fax.+33 (1) 53 14 59 22
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