#20859: Simplify the logic handling the EvaluationMethods mixin class for
Expression
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Reporter: jdemeyer | Owner:
Type: enhancement | Status: new
Priority: major | Milestone: sage-7.3
Component: symbolics | Resolution:
Keywords: | Merged in:
Authors: Nicolas M. Thiéry | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
u/nthiery/optimize_method_lookup_from_the_categories_for_instances_of_cython_classes|
5619a7d0f032f4273069166e6babf938b8c3f40a
Dependencies: #20825, #20686 | Stopgaps:
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Comment (by jdemeyer):
Replying to [comment:13 nthiery]:
> Using a metaclass would mean one more piece of purely technical
> syntax, which is one more chance for the programmer to forget
> something. Still you have a good point here: the infrastructure should
> check that XXXMethods inherits from nothing, and raise an explanatory
> error message if not.
I'm not saying a metaclass is the right solution, it was just some
proposal. That being said, you could think if there are other ways in
which your "bag-of-methods" classes differ from "real" classes. Such
differences might be handled cleanly by such metaclass. For example, you
could use the metaclass to disable automatic binding of methods or to
disallow instantiation of the class.
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