#14054: Cythoned UniqueRepresentation
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Reporter: SimonKing | Owner: tbd
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-5.8
Component: performance | Resolution:
Keywords: cython UniqueRepresentation | Work issues:
Report Upstream: N/A | Reviewers: Travis
Scrimshaw
Authors: Simon King | Merged in:
Dependencies: #14017, #6495, #14159 | Stopgaps:
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Comment (by SimonKing):
I hesitate to do things like
{{{
from sage.misc.superseded import deprecated_function_alias
from sage.misc.fast_methods import FastFashable_class as FH_class
FastHashable_class = deprecated_function_alias(14054,FH_class)
}}}
in sage.categories.category_singleton:
- It adds an unneeded import statement
- `FastHashable_class` is a base class, and hence one would like to
inherit from it. But doing the above, `FastHashable_class` would not be a
class but a function in sage.categories.category_singleton.
- In its now deprecated use, it was necessary to ''cimport'' (not just
import!) the class. That will be impossible, no matter what way of
deprecation warning we use, because deprecation warnings won't work at
compile time.
Is there a "lazy import statement with deprecation"? Then, one would not
actually import `FastHashable_class` in category_singleton, but `from
sage.categories.category_singleton import FastHashable_class` would result
in a deprecation warning. And we can't cope with the compile time cimport
problem anyway.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/14054#comment:40>
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