[Bug libstdc++/110917] std::format_to(int*, ...) fails to compile because of _S_make_span

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110917

--- Comment #5 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-13 branch has been updated by Jonathan Wakely
<r...@gcc.gnu.org>:

https://gcc.gnu.org/g:0f0152a93d15b24ebc7f6c7455baaded6a63fb2e

commit r13-7698-g0f0152a93d15b24ebc7f6c7455baaded6a63fb2e
Author: Jonathan Wakely <jwak...@redhat.com>
Date:   Mon Aug 7 14:37:25 2023 +0100

    libstdc++: Constrain __format::_Iter_sink for contiguous iterators
[PR110917]

    We can't write to a span<_CharT> if the contiguous iterator has a value
    type that isn't _CharT.

    libstdc++-v3/ChangeLog:

            PR libstdc++/110917
            * include/std/format (__format::_Iter_sink<CharT, OutIter>):
            Constrain partial specialization for contiguous iterators to
            require the value type to be CharT.
            * testsuite/std/format/functions/format_to.cc: New test.

    (cherry picked from commit c5ea5aecac323e9094e4dc967f54090cb244bc6a)