#16750: libgap fails converting char GapElements to Sage
-------------------------------------+-------------------------------------
Reporter: rws | Owner:
Type: defect | Status: positive_review
Priority: major | Milestone: sage-6.3
Component: interfaces | Resolution:
Keywords: conversion, | Merged in:
string | Reviewers: Ralf Stephan
Authors: Volker Braun | Work issues:
Report Upstream: N/A | Commit:
Branch: | 843ba48dc7753d79e51ea61e7e2ec3daa9149878
u/vbraun/libgap_fails_converting_string_gapelements_to_sage| Stopgaps:
Dependencies: |
-------------------------------------+-------------------------------------
Changes (by rws):
* status: needs_review => positive_review
Comment:
The `sage()` member function of `T_CHAR` will be passed to parent because
no `T_CHAR` child is implemented.
{{{
sage: ans=libgap.eval("UnorderedTuples(['a', 'b', 'c'],2)"); ans
[ "aa", "ab", "ac", "bb", "bc", "cc" ]
sage: a=ans[0]; a
"aa"
sage: a[0]
'a'
sage: type(_)
<type 'sage.libs.gap.element.GapElement'>
sage: a[0]._type_number()
(9L, 'T_CHAR')
sage: a[0].sage()
Traceback (most recent call last):
File "<ipython-input-50-b805c595d1a5>", line 1, in <module>
a[Integer(0)].sage()
File "element.pyx", line 1024, in sage.libs.gap.element.GapElement.sage
(build/cythonized/sage/libs/gap/element.c:8749)
NotImplementedError: cannot construct equivalent Sage object
}}}
I have changed your patch according to my belief what went wrong. If you
disagree then, well, fix it yourself 8)
--
Ticket URL: <http://trac.sagemath.org/ticket/16750#comment:8>
Sage <http://www.sagemath.org>
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