#20731: shortcut coercion for Integer-Rational operations
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Reporter: vdelecroix | Owner:
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-7.3
Component: coercion | Resolution:
Keywords: sd74 | Merged in:
Authors: Vincent Delecroix | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
u/vdelecroix/20731 | 675f8e617bdcc66e718d18089938b8d1458d0724
Dependencies: | Stopgaps:
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Comment (by vdelecroix):
Replying to [comment:23 jdemeyer]:
> I'm still not convinced by the `if type(x) is type(y)`. That would break
if somebody wants to subclass `Integer` for some reason. You can check the
types first as an optimization, but you should still support the case
where `isinstance(x, Integer) and isinstance(y, Integer)`.
It perfectly works ;-)
{{{
sage: class A(Integer): pass
sage: A() + 1
1
sage: 1 + A()
1
}}}
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Ticket URL: <http://trac.sagemath.org/ticket/20731#comment:25>
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