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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/112796] <algorithm> header implicitly includes
 <concepts>
Date: Fri, 01 Dec 2023 13:21:39 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D112796

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |WONTFIX

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This is not a bug in GCC, the C++ standard allows any header to include any
other. The bug is in your code, and we can't generally diagnose it.

It's simply not possible to implement <algorithm> without at least some of =
the
concepts defined in <concepts>, because the algos are specified in terms of
those concepts.

Similarly, nearly every header includes the <type_traits> header.

While it would be nice if we didn't expose all of <concepts> for any program
that doesn't include it explicitly, that's just not practical, sorry.=