transparent proxy of string_view as key for associative containers.

[Ville Voutilainen]

On Sat, 28 Nov 2020 at 13:02, François Dumont via Libstdc++
<libstdc++@gcc.gnu.org> wrote:
>
> Hi
>
>      Just for information I am starting the work on this following this
> paper: http://wg21.link/p1690r1

Thanks for the heads-up, because I was about to start doing that. All
yours, go ahead, I'll hack on something else.

I took a brief look at this, and we basically need to add the
templated overloads all the way down to the hash table,
but other than that, there doesn't seem to be anything too tedious in this.