[Bug libstdc++/111327] std::bind_front (and std::not_fn) doesn't always perfectly forward according to value category of the call wrapper object

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111327

--- Comment #10 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Patrick Palka <ppalka@gcc.gnu.org>:

https://gcc.gnu.org/g:b212314667d4cf636c7728d2c91f028c516e7df8

commit r16-5917-gb212314667d4cf636c7728d2c91f028c516e7df8
Author: Patrick Palka <ppalka@redhat.com>
Date:   Fri Dec 5 12:15:08 2025 -0500

    libstdc++: Use deducing this in std::bind_front even in C++20 [PR111327]

            PR libstdc++/111327

    libstdc++-v3/ChangeLog:

            * include/bits/binders.h (_Binder::operator())
            [_GLIBCXX_EXPLICIT_THIS_PARAMETER]: Also use deducing this in
            C++20 mode when possible.
            * testsuite/20_util/function_objects/bind_front/111327.cc:
            Expect error inside header even in C++20 mode.

    Reviewed-by: Tomasz KamiÅski <tkaminsk@redhat.com>
    Reviewed-by: Jonathan Wakely <jwakely@redhat.com>