#6391: libGAP! -- create a Cython library interface to gap
----------------------------------------------------------------------------+
Reporter: was |
Owner: was
Type: enhancement |
Status: needs_review
Priority: major |
Milestone: sage-5.3
Component: group theory |
Resolution:
Keywords: |
Work issues:
Report Upstream: N/A |
Reviewers: Dima Pasechnik, Ivan Andrus, Volker Braun, William Stein
Authors: Dima Pasechnik, Ivan Andrus, Volker Braun, William Stein |
Merged in:
Dependencies: #13211 |
Stopgaps:
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Old description:
> There's libSingular, there's libPari, and next we need to create libGAP.
>
> To try it out,
> * Install http://www.stp.dias.ie/~vbraun/Sage/spkg/gap-4.5.5.spkg from
> #13211
> * Install http://www.stp.dias.ie/~vbraun/Sage/spkg/libgap-4.5.5.spkg
> * Apply [attachment:trac_6391_libGAP.patch] to the Sage library
New description:
There's libSingular, there's libPari, and next we need to create libGAP.
To try it out,
* Install http://www.stp.dias.ie/~vbraun/Sage/spkg/gap-4.5.6.spkg from
#13211
* Install http://www.stp.dias.ie/~vbraun/Sage/spkg/libgap-4.5.6.spkg
* Apply [attachment:trac_6391_libGAP.patch] to the Sage library
--
Comment (by vbraun):
Ok, done. Comparison works now:
{{{
sage: libgap('test') == libgap.Concatenation(libgap('te'), libgap('st'))
True
}}}
I made one incompatible change: since `libgap` is the parent to all gap
elements, it should do element construction for strings:
{{{
sage: libgap('1+1')
"1+1"
sage: type(_)
<type 'sage.libs.gap.element.GapElement_String'>
}}}
To evaluate a GAP command in a string, you now have to use
{{{
sage: libgap.eval('1+1')
2
}}}
Since we aim at wrapping more of GAP one expects that the `libgap.eval`
method becomes less useful over time.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/6391#comment:97>
Sage <http://www.sagemath.org>
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