On Wed, 22 Jul 2020 at 12:38, Gašper Ažman via Std-Proposals
<std-proposals_at_[hidden]> wrote:
>
> Isn't it wonderful that deducing this makes the above SO much easier to do?

Does it? an operator[] needs to be a non-static member function, and a
deduced-this function isn't.

>> T & operator[](size_t i) &;
>> const T & operator[](size_t i) const &;
>> T && operator[](size_t i) &&;
>> const T && operator[](size_t i) const &&;