On Sat, Oct 15, 2022 at 6:29 AM blacktea hamburger via Std-Proposals <
std-proposals_at_[hidden]> wrote:

> On Friday, October 7, 2022, Arthur O'Dwyer <arthur.j.odwyer_at_[hidden]>
> wrote:
> > On Fri, Oct 7, 2022 at 7:42 AM blacktea hamburger via Std-Proposals <
> std-proposals_at_[hidden]> wrote:
> >>
> >> std::vector<bool>::reference and std::bitset::reference are both
> proxies, so even if they themselves are const, they can still be used to
> change the bit they reference.
> >> Are there any issues?
> >
> > IIUC, you're talking about Jonathan Wakely's P/R of LWG 3638, and
> proposing that it should be amended to say
> > constexpr void flip() const noexcept;
> > I would tend to agree with this suggestion (although `flip()` is a dumb
> member function to have, in general).
> > And then bitset::reference [template.bitset.general] should be updated
> in the same way:
> > constexpr reference& flip() noexcept;
> > constexpr const reference& flip() const noexcept;
> > If you're proposing anything else in addition to those two changes to
> `flip()`, it's not obvious to me from what you said.
>

And assignment operators. I don't know why you excluded them.
>

The assignment operators are already const in C++23.
https://en.cppreference.com/w/cpp/container/vector_bool/reference

–Arthur