On 2022-10-14 13:36, Phil Bouchard via Std-Proposals wrote:

> I didn't know there was already a proposal for it.

You can find it here:

https://open-std.org/jtc1/sc22/wg21/docs/papers/2016/p0146r1.html

For some reason it does not appear on the github paper tracker, so it is
hard to know its status.

Cheers,

Maxime.