#10963: More functorial constructions
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Reporter: nthiery | Owner: stumpc5
Type: enhancement | Status: needs_info
Priority: major | Milestone: sage-6.2
Component: categories | Resolution:
Keywords: days54 | Merged in:
Authors: Nicolas M. Thiéry | Reviewers: Simon King, Frédéric
Report Upstream: N/A | Chapoton
Branch: | Work issues:
public/ticket/10963-doc- | Commit:
distributive | 7ab3103368e46d33f37e135a9eb09a1e16a029a7
Dependencies: #11224, #8327, | Stopgaps:
#10193, #12895, #14516, #14722, |
#13589, #14471, #15069, #15094, |
#11688, #13394, #15150, #15506, |
#15757, #15759 |
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Comment (by tscrim):
<rant>Nested classes have always been a problem to/for me. In Java, one
can get performance problems via private access. I tried doing nested-
classes in C++ with templates once and I couldn't get it to work. After
looking into the STL, for example an iterator, they create the iterator
outside of the container class, but have it referenced by the container
class.</rant> In python, there's some technical things I'm not fully
versed in, but it seems to be okay...at least to one level deep.
With that being said (and keeping in mind I'm probably missing something),
if we wanted to have `Cs.A` and `Ds.A` be the same class, but `Cs` and
`Ds` are "unrelated", then IMO `A` should be written as a separate (non-
nested) class and it follows good OOP. Yet if `Cs.A` and `Ds.A` are
written in each class, I don't see the conflict.
Thank you all for your work on this.
PS - Nicolas, you numbering is off `:p`
--
Ticket URL: <http://trac.sagemath.org/ticket/10963#comment:542>
Sage <http://www.sagemath.org>
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