[Bug libstdc++/94354] std::reverse_iterator comparison operators defined incorrectly

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94354

--- Comment #2 from CVS 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:81a8d137c22953df2ea046466c62cd26c0dba103

commit r10-7434-g81a8d137c22953df2ea046466c62cd26c0dba103
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Fri Mar 27 23:21:58 2020 +0000

    libstdc++: Add remaining C++20 changes to iterator adaptors

    This adds the missing parts of P0896R4 to reverse_iterator and
    move_iterator, so that they meet the C++20 requirements. This should be
    the last piece of P0896R4, meaning ranges support is now complete.

    The PR 94354 bug with reverse_iterator's comparisons is fixed for C++20
    only, but that change should be extended to C++11, C++14 and C++17 modes
    in stage 1.

            * include/bits/stl_iterator.h (reverse_iterator::iterator_concept)
            (reverse_iterator::iterator_category): Define for C++20.
            (reverse_iterator): Define comparison operators correctly for
C++20.
            (__normal_iterator): Add constraints to comparison operators for
C++20.
            (move_iterator::operator++(int)) [__cpp_lib_concepts]: Define new
            overload for input iterators.
            (move_iterator): Add constraints to comparison operators for C++20.
            Define operator<=> for C++20.
            * testsuite/24_iterators/move_iterator/input_iterator.cc: New test.
            * testsuite/24_iterators/move_iterator/move_only.cc: New test.
            * testsuite/24_iterators/move_iterator/rel_ops_c++20.cc: New test.
            * testsuite/24_iterators/reverse_iterator/rel_ops_c++20.cc: New
test.