#20859: Simplify the logic handling the EvaluationMethods mixin class for
Expression
-------------------------------------+-------------------------------------
       Reporter:  jdemeyer           |        Owner:
           Type:  enhancement        |       Status:  new
       Priority:  major              |    Milestone:  sage-7.3
      Component:  symbolics          |   Resolution:
       Keywords:                     |    Merged in:
        Authors:  Nicolas M. ThiƩry  |    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:
-------------------------------------+-------------------------------------

Comment (by jdemeyer):

 The hypothetical metaclass would also serve as entry point to
 documentation. If I see
 {{{
 class ElementMethods(BagOfStuff):
     ....
 }}}
 somewhere and want to understand what it does, I could do
 {{{
 sage: BagOfStuff?
 }}}
 which will hopefully explain that this class isn't really a class, but
 just some syntax to define a dict.

 I don't know those `XXXMethods` classes well enough to say whether it's
 the right solution, but it's certainly something you should consider.

 And this `BagOfStuff` would of course be a new-style class, rendering the
 other discussion obsolete :-)

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