On 10/26/22 09:04, Dave Brown via Std-Proposals wrote:
> This was earlier proposed as P0059, but appears to have seen little
> work in the last few years.
> Note, however, that this is a span-like container and doesn't own the
> elements. You need to
> create an array and apply the ring_span to it.
>
> I would be interested in seeing this picked up again.
>
> http://wg21.link/p0059
>
> /Dave

Yeah or even better: the ring_span could be a derivative class of any
arbitrary container:

template <typename T, typename C, class Popper = default_popper<T>>

class ring_span : public C

{

    [...]

};

ring_span<std::array<int, 5>> Q(std::begin(A), std::end(A));


>
> On Wed, 26 Oct 2022 at 14:53, Phil Bouchard via Std-Proposals
> <std-proposals_at_[hidden]> wrote:
>
> Greetings,
>
> I'm surprised this is not part of the standard library yet:
>
> https://www.boost.org/doc/libs/1_49_0/libs/circular_buffer/doc/circular_buffer.html
>
> As it is 5 times the speed of a deque and list:
>
> https://www.codeproject.com/Articles/1185449/Performance-of-a-Circular-Buffer-vs-Vector-Deque-a
>
> This container is pretty useful as I must have used it 3-4 times
> in different projects over the last 2 years (rotating log files,
> buffering for AI algorithms and preemptive recording of videos).
>
> I encourage its integration because not everybody wants to use the
> Boost library given its complexity to manage.
>
>
> Regards,
>
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