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@lists.isocpp.org> 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,

--

Phil Bouchard CTO T: (819) 328-4743 E: phil@fornux.com | www.fornux.com 1188 rue Saint-Louis | Gatineau (Qc), J8T 2L8 Canada

Le message ci-dessus, ainsi que les documents l'accompagnant, sont destinés uniquement aux personnes identifiées et peuvent contenir des informations privilégiées, confidentielles ou ne pouvant être divulguées. Si vous avez reçu ce message par erreur, veuillez le détruire. This communication (and/or the attachments) is intended for named recipients only and may contain privileged or confidential information which is not to be disclosed. If you received this communication by mistake please destroy all copies.

--
Std-Proposals mailing list
Std-Proposals@lists.isocpp.org
https://lists.isocpp.org/mailman/listinfo.cgi/std-proposals

--

David Brown

Puffinpack

Mobile: +46 735 231 242

--

Phil Bouchard CTO T: (819) 328-4743 E: phil@fornux.com | www.fornux.com 1188 rue Saint-Louis | Gatineau (Qc), J8T 2L8 Canada

Le message ci-dessus, ainsi que les documents l'accompagnant, sont destinés uniquement aux personnes identifiées et peuvent contenir des informations privilégiées, confidentielles ou ne pouvant être divulguées. Si vous avez reçu ce message par erreur, veuillez le détruire. This communication (and/or the attachments) is intended for named recipients only and may contain privileged or confidential information which is not to be disclosed. If you received this communication by mistake please destroy all copies.