[Bug libstdc++/119888] [15/16 Regression] std::projected is no longer a class for C++20/23

[cvs-commit at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119888

--- Comment #12 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-15 branch has been updated by Patrick Palka
<ppa...@gcc.gnu.org>:

https://gcc.gnu.org/g:63bda370eddf091c456cea3df82e0e5aa9a1fa97

commit r15-9572-g63bda370eddf091c456cea3df82e0e5aa9a1fa97
Author: Patrick Palka <ppa...@redhat.com>
Date:   Tue Apr 22 12:55:05 2025 -0400

    Revert "libstdc++: Optimize std::projected<I, std::identity>" [PR119888]

    This non-standard optimization breaks real-world code that expects the
    result of std::projected to always (be a class type and) have a value_type
    member, which isn't true for e.g. I=int*, so revert it for now.

            PR libstdc++/119888

    This reverts commit 51761c50f843d5be4e24172535e4524b5072f24c.