#9964: Document _pari_ and _pari_init_
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Reporter: jdemeyer | Owner: mvngu
Type: defect | Status: new
Priority: blocker | Milestone: sage-4.6
Component: documentation | Keywords:
Author: | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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Changes (by jdemeyer):
* cc: mhansen, SimonKing (added)
Comment:
Replying to [comment:3 mhansen]:
> The idea behind all of the _XXX_ and _XXX_init_ methods is that _XXX_
> returns the actual object whereas _XXX_init_ returns something which
> is fed into the parent's __call__ method.
>
> The reason why the PARI situation is a bit more complicated is that
> anything string you return from _gp_init_ should be valid as a
> _pari_init_ function. We should really name the name="pari" in the gp
> Expect object so that we can remove the special case code. We should
> then also just have the default implementation of _gp_init_ call
> _pari_init_ so that if you just define that, it will work for both gp
> and pari.
> }}}
I think I understand what you're saying, I just don't understand why
things are implemented like this. If what you say is correct, then in
almost no case it makes sense to have a {{{_pari_init_}}} function, since
constructing an object through a string is almost certainly slower than
using the PARI library. So we really should use {{{_pari_}}} instead of
{{{_pari_init_}}}.
Then we should rename {{{_pari_init_}}} to {{{_gp_init_}}} because we
still need the strings for the Gp interface (and specifying
{{{name="gp"}}} instead of {{{name="pari"}}} in Gp and removing all the
special case code).
What do you think?
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/9964#comment:4>
Sage <http://www.sagemath.org>
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