macros.h (__glibcxx_check_can_increment_range): New.
2018-06-12 François Dumont <fdumont@gcc.gnu.org>
* include/debug/macros.h (__glibcxx_check_can_increment_range): New.
(__glibcxx_check_can_decrement_range): New.
* include/debug/debug.h (__glibcxx_requires_can_increment_range): New.
(__glibcxx_requires_can_decrement_range): New.
* include/bits/stl_algobase.h (std::copy(_II, _II, _OI)): Use
__glibcxx_requires_can_increment_range.
(std::move(_II, _II, _OI)): Likewise.
(std::copy_backward(_BI, _BI, _BI2)): Use
__glibcxx_requires_can_decrement_range.
(std::move_backward(_BI, _BI, _BI2)): Likewise.
* testsuite/25_algorithms/copy_backward/debug/1_neg.cc: New.
* testsuite/25_algorithms/copy_backward/debug/2_neg.cc: New.
* testsuite/25_algorithms/copy_backward/debug/3_neg.cc: New.
* testsuite/25_algorithms/equal/debug/1_neg.cc: New.
* testsuite/25_algorithms/equal/debug/2_neg.cc: New.
* testsuite/25_algorithms/equal/debug/3_neg.cc: New.
From-SVN: r261525
84a9d3b6c1