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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/109536] Failure to compile constexpr std::vector with
 -D_GLIBCXX_DEBUG
Date: Mon, 17 Apr 2023 20:41:02 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D109536

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jakub at gcc dot gnu.org

--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
12-5187-g1ae8edf5f73ca5c3 acknowledged that:
libstdc++: Implement constexpr std::vector for C++20

This implements P1004R2 ("Making std::vector constexpr") for C++20.

For now, debug mode vectors are not supported in constant expressions.
To make that work we might need to disable all attaching/detaching of
safe iterators. That can be fixed later.=