#17890: Remove _(rich)cmp_c_impl
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Reporter: jdemeyer | Owner:
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-6.7
Component: cython | Resolution:
Keywords: | Merged in:
Authors: Jeroen Demeyer | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
u/jdemeyer/ticket/17890 | 0d1e049f807a1c34b00cf0e58ee65cc7734d1ad1
Dependencies: | Stopgaps:
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Comment (by jdemeyer):
Replying to [comment:55 vdelecroix]:
> You wrote in the doc of `_richcmp`
> {{{
> If a class wants to implement rich comparison without coercion,
> then ``_richcmp`` should be defined (as well as ``__richcmp__``
> as usual).
> }}}
> Why not define directly `__richcmp__` in that case?
Because rich comparison after coercion calls `_richcmp`, not
`__richcmp__`. The only reason this works for `Integer` is that `ZZ` has
no sub-rings: it is never the common parent of two different parents.
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Ticket URL: <http://trac.sagemath.org/ticket/17890#comment:56>
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