On Mon, Jan 10, 2005 at 01:34:59PM -0500, Phillip J. Eby wrote: | The performance penalty I was talking about was for using an abstract | base class, in a subclass with a __conform__ method for conformance to | other protocols. In this case, __conform__ will be uselessly called | every time the object is adapted to the abstract base class.
*nod* If this proposal was "packaged" with an "interface" mechanism, would this address your concern? In this scenerio, there are two cases: - Older classes will most likely not have a __conform__ method. - Newer classes will use the 'interface' mechanism. In this scenerio, there isn't a performance penalty for the usual case; and for migration purposes, a flag could be added to disable the checking. Best, Clark _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
