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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/115960] gcc throws an error when I use Optional in c++17.
Date: Wed, 17 Jul 2024 09:15:23 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D115960

--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
> The problem seems to be that, despite passing "-std=3Dc++17", it doesn't =
use c++17
> header files for the Optional identifier.

Why should it? The name "Optional" is not part of any C++ standard.=