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Subject: Re: Fwd: Is __cpp_lib_constexpr_char_traits "official"?
From: Barry Revzin (barry.revzin_at_[hidden])
Date: 2020-06-15 09:24:39


On Mon, Jun 15, 2020 at 5:45 AM Jonathan Wakely via SG10 <
sg10_at_[hidden]> wrote:

> Please see the 2018 thread below. I think this macro should be added to
> SD-6 and the IS, and I think it should also be updated to 201811L for the
> P1032R1 "Misc constexpr bits" changes that made the remaining char_traits
> members constexpr. All the other bits of P1032R1 have their own macro now
> instead of __cpp_lib_constexpr_misc, but not the char_traits bits.
>
> Libstdc++ has been defining __cpp_lib_constexpr_char_traits to 201611 for
> years (and I'm about to update the value to 201811 in the relevant
> branches).
>
> Any objection before I open an LWG issue?
>

Should it go into __cpp_lib_constexpr_string, based
https://isocpp.org/std/standing-documents/sd-6-sg10-feature-test-recommendations#constexpr
?

Barry



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