It seems reasonable to me, at least.

On 15 June 2018 at 17:30, Jonathan Wakely <cxx_at_[hidden]> wrote:

> I don't see it in P0096R5, although http://www.open-std.
> org/jtc1/sc22/wg21/docs/papers/2016/p0426r1.html recommended it.
>
> It seems to be useful to know whether you can use
> char_traits<char>::length() in a constexpr function, or whether you need to
> write your own.
>
>
>
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