#17890: Remove _(rich)cmp_c_impl
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Reporter: jdemeyer | Owner:
Type: enhancement | Status: needs_work
Priority: major | Milestone: sage-6.6
Component: cython | Resolution:
Keywords: | Merged in:
Authors: Jeroen Demeyer | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
u/jdemeyer/ticket/17890 | 17bd067153ad40ced061147390687f514a7f7cba
Dependencies: | Stopgaps:
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Changes (by vdelecroix):
* status: needs_review => needs_work
Comment:
5. For Python classes, I guess that one needs to implement `_cmp_` and/or
`_richcmp_`. This must be precised in the doc of `Element/Parent`. For
this reason, we need a `py_rich_to_bool` available at the level of Python
(as well as the operators `Py_EQ`, `Py_NE`, etc).
6. I think we should avoid implenting `__eq__`, `__ne__` because one can
do with `_richcmp_` that would take care of coercions. What do you think?
7. There should be a mention of the Python issue that `cmp(a,b)` with `a`
and `b` of different types does not call `_cmp_` (or `__cmp__`)
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Ticket URL: <http://trac.sagemath.org/ticket/17890#comment:39>
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