#19208: Replace remaining instances of has_coerce_map_from_[c_]impl by
_coerce_map_from_
-------------------------------------+-------------------------------------
Reporter: pbruin | Owner:
Type: task | Status: needs_review
Priority: minor | Milestone: sage-6.9
Component: coercion | Resolution:
Keywords: | Merged in:
Authors: Peter Bruin, | Reviewers:
Jeroen Demeyer | Work issues:
Report Upstream: N/A | Commit:
Branch: | 49b9a59494b493eb352fa6dbae23fd6750e8499d
u/pbruin/19208-has_coerce_map_from_impl| Stopgaps:
Dependencies: |
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Changes (by {'newvalue': u'Peter Bruin, Jeroen Demeyer', 'oldvalue': u'Peter
Bruin'}):
* author: Peter Bruin => Peter Bruin, Jeroen Demeyer
Old description:
> The two remaining occurrences of the old-style
> `has_coerce_map_from_[c_]impl` should be replaced by
> `_coerce_map_from_()`. In addition, `Singular._coerce_map_from_()` now
> returns `None` if no coercion map is known (instead of returning `False`
> or raising a `NotImplementedError`).
>
> After this ticket, the only occurrences of
> `[has_]coerce_map_from_[c_]impl` are in the module
> `sage.structure.parent_old`.
New description:
The two remaining occurrences of the old-style
`has_coerce_map_from_[c_]impl` should be replaced by
`_coerce_map_from_()`.
In addition, `Singular._coerce_map_from_()` now returns `None` if no
coercion map is known (instead of returning `False` or raising a
`NotImplementedError`).
We remove some left-overs of the old coercion model in `homset.py` (which
uses the new coercion model now).
We also remove completely the methods `_coerce_self_c`, `_coerce_self`,
`has_coerce_map_from_impl`, `coerce_map_from_impl`.
--
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Ticket URL: <http://trac.sagemath.org/ticket/19208#comment:6>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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