#12913: Deprecate CombinatorialClass in favor of the EnumeratedSet's categories
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Reporter: nthiery | Owner: sage-combinat
Type: enhancement | Status: new
Priority: major | Milestone: sage-5.1
Component: combinatorics | Keywords:
Work issues: | Report Upstream: N/A
Reviewers: | Authors:
Merged in: | Dependencies:
Stopgaps: |
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All classes that currently inherit from {{{CombinatorialClass}}} should
instead inherit from Parent and register themselves in one of the
categories ({{{*EnumeratedSets}}}, {{{*FiniteEnumeratedSets}}}, or
{{{*InfiniteEnumeratedSets}}}). For examples, see e.g.
{{{FiniteEnumeratedSets().example()}}}.
* Expected benefits:
* Uniform interface
* Support for TestSuite
* Support for conversions, coercions, and morphisms, in particular for
bijections (as morphisms in the category of Sets with bijection, with
properly defined domain and co-domain rather than python functions).
* Steps:
1. Let {{{CombinatorialClass}}} inherits from {{{Parent}}} (mostly done
#8910)
1. For each {{{CombinatorialClass}}} C:
* Have C inherit directly from {{{Parent}}}
* Ensure that {{{C.__init__}}} sets up the proper category
(Finite|Infinite)...
* Add {{{TestSuite(C).run()}}} to the doctests and make all the tests
pass
* Have a properly setup attribute {{{C.Element}}} and use
{{{C.element_class}}} (as defined by the categories) when constructing
elements
* Ensure proper unique representation behavior by having C inherit
both from {{{UniqueRepresentation}}} and {{{Parent}}}
1. Deprecate and remove {{{CombinatorialClass}}}
1. Turn all the factory functions into factory classes by mean of
{{{ClasscallMetaClass}}}; see {{{PerfectMatching}}} and {{{Trees}}} for an
advanced example.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/12913>
Sage <http://www.sagemath.org>
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