#15718: Implement the __init_extra__ protocol of categories for Cython classes.
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Reporter: nthiery | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-6.1
Component: categories | Resolution:
Keywords: | Merged in:
Authors: | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: | Stopgaps:
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Comment (by nbruin):
Replying to [comment:11 SimonKing]:
> Note that the idea is to go up `self.__class__.mro()` on the one hand,
and `self.category().parent_class.mro()`, on the other hand. The former is
no problem, since self is an instance of its class and thus we don't need
the `__func__` attribute. The latter is (currently, at least) no problem,
since parent classes of categories are Python classes and thus have
`__func__` on their methods. Or am I mistaken?
Well, anything can be assigned to attributes in principle, regardless of
whether something is a python class or not. Should we ever migrate to
Python 3 then there are no unbound instancemethods at all: they are just
plain functions there.
So I'd say:
* check if `__init_extra__.im_func` exists (this indicates an
`instancemethod` object). If so, perhaps check if `__init_extra__.im_self`
is None (unbound method). If it does, then call `im_func`.
* otherwise, just call `__init_extra__`.
It's hardly more coding work and should be far more robust.
--
Ticket URL: <http://trac.sagemath.org/ticket/15718#comment:12>
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