#10496: The default call method of maps does not do as promised by the
documentation
--------------------------+-------------------------------------------------
Reporter: SimonKing | Owner: robertwb
Type: defect | Status: needs_work
Priority: major | Milestone: sage-4.6.2
Component: coercion | Keywords: generic call map
Author: Simon King | Upstream: N/A
Reviewer: David Roe | Merged:
Work_issues: |
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Changes (by roed):
* status: needs_review => needs_work
* reviewer: => David Roe
Comment:
I approve of the design and goals, but I'm worried about the
implementation speed. The current implementation does not introduce much
overhead over `_call_`, but
{{{
if not self._domain.has_coerce_map_from(parent_c(x)):
if hasattr(self,'pushforward'):
}}}
are both pretty costly calls. I think you need to add some fast pathways
for common cases, such as `x` actually lying in the domain.
Similarly, use `PY_TYPE_CHECK` in cython files, rather than `isinstance`.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10496#comment:2>
Sage <http://www.sagemath.org>
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