24.01.2014, 22:58, "Robert P. Goldman" <rpgold...@sift.info>: > I believe that the issue was that Faré couldn't preserve both: > > 1. OPERATION is the universal superclass so that methods on it could do > things like introspection, collect statistics, etc. and > > 2. OPERATION provides a certain expected set of behaviors to those who > wish to provide their own subclasses. > > He had to choose one or the other, so he chose 1, and sacrificed 2. He > has successfully convinced me, at least, that he couldn't do both.
Idea. Theoretically, OPERATION may be the root class and keep the old semantics (downward + selfward + other). And subclasses override this semantics as they do now: DOWNWARD-PERATION, SELFWARD-OPERATION, etc. This may lead to some code duplication in ASDF.
