[Bug libstdc++/110356] [C++26] P2637R3 Member visit

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110356

--- Comment #3 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Jonathan Wakely <redi@gcc.gnu.org>:

https://gcc.gnu.org/g:08782a5d92bacc3af947caf79d19bf25eae02e7b

commit r15-2448-g08782a5d92bacc3af947caf79d19bf25eae02e7b
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Tue Jul 16 10:14:45 2024 +0100

    libstdc++: Define C++26 member visit for std::basic_format_arg [PR110356]

    Implement the std::format changes from P2637R3. This adds visit member
    functions to std::basic_format_arg and deprecates the non-member
    function std::visit_format_arg.

    libstdc++-v3/ChangeLog:

            PR libstdc++/110356
            * include/bits/c++config (_GLIBCXX26_DEPRECATED): Define.
            (_GLIBCXX26_DEPRECATED_SUGGEST): Define.
            * include/bits/version.def (format): Update for C++26.
            * include/bits/version.h: Regenerate.
            * include/std/format (basic_format_arg::visit): New member
            functions.
            (visit_format_arg): Add deprecated attribute.
            * testsuite/std/format/arguments/args.cc: Expect deprecated
            warnings. Check member visit.
            * testsuite/std/format/functions/format.cc: Update expected
            value for __cpp_lib_format macro.
            * testsuite/std/format/parse_ctx.cc: Add dg-warning for
            deprecation.