#10963: More functorial constructions
-------------------------------------+-------------------------------------
       Reporter:  nthiery            |        Owner:  stumpc5
           Type:  enhancement        |       Status:  needs_work
       Priority:  major              |    Milestone:  sage-6.1
      Component:  categories         |   Resolution:
       Keywords:  days54             |    Merged in:
        Authors:  Nicolas M. Thiéry  |    Reviewers:  Simon King, Frédéric
Report Upstream:  N/A                |  Chapoton
         Branch:                     |  Work issues:  Detect and fix
  public/ticket/10963                |  Heisenbugs
   Dependencies:  #11224, #8327,     |       Commit:
  #10193, #12895, #14516, #14722,    |  8eaf51a82c4e2194769db13457979ae601ebbc04
  #13589, #14471, #15069, #15094,    |     Stopgaps:
  #11688, #13394, #15150, #15506     |
-------------------------------------+-------------------------------------

Comment (by tscrim):

 I'm not completely convinced because you're still getting some calls
 twice. It seems that with your changes, the ones that get called twice are
 those that are not nested or called via a `cached_method`. In fact, it
 seems like those are the same classes that fell into this recursion loop,
 so while this might help (and even be a fix for the problem at hand), I
 don't think this is the "right" solution.

 Perhaps this is a question more for Nicolas, but is there a reason why we
 need a separate (cached) function `base_category_class_and_axiom` and not
 just including it with the lazy attribute? It seems that it's only called
 in the lazy attribute.

--
Ticket URL: <http://trac.sagemath.org/ticket/10963#comment:259>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica, 
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