#15820: Implement sequences of bounded integers
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Reporter: SimonKing | Owner:
Type: enhancement | Status: needs_work
Priority: major | Milestone: sage-6.4
Component: algebra | Resolution:
Keywords: sequence bounded | Merged in:
integer | Reviewers:
Authors: Simon King | Work issues:
Report Upstream: N/A | Commit:
Branch: | 1f5a53e7b23e406c553d789f83604cd4a7f90655
u/SimonKing/ticket/15820 | Stopgaps:
Dependencies: |
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Comment (by SimonKing):
Replying to [comment:197 jdemeyer]:
> Replying to [comment:196 SimonKing]:
> > One more reason for using "int" as return type: If I use `mp_limb_t`,
then `6` is printed as `6L`.
> That's not one more reason to use `int`, it's one less reason to use
`mp_limb_t`. With `mp_limb_signed_t` (which isn't declared but should be
in `src/sage/libs/gmp/types.pxd`), you shouldn't have this problem.
There may be a problem with either `int` or `mp_limb_signed_t`: If the
bound for the integer sequence is very large, then a single item would
fill a whole `mp_limb_t`. However, this would not fit into a ''signed''
int/limb.
So, at the moment, it seems to me that `ctypedef mp_limb_t biseq_item_t`
is preferred. Since the `__repr__` method is not time-critical, I suggest
to do the transformation from `mp_limb_t` to a nicely printed type there.
I would accept that `__getitem__` returns something that is not so nicely
printed.
--
Ticket URL: <http://trac.sagemath.org/ticket/15820#comment:199>
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