2025-05-23  Release Manager

	* GCC 14.3.0 released.

2025-05-13  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2025-05-12  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/120198
	* include/bits/version.def (scoped_lock): Do not depend on
	gthreads or hosted.
	* include/bits/version.h: Regenerate.
	* include/std/mutex (scoped_lock): Update comment.
	* testsuite/30_threads/scoped_lock/requirements/typedefs.cc:
	Remove dg-require-gthreads and use custom lockable type instead
	of std::mutex. Check that typedef is only present for a single
	template argument.

2025-05-12  Jonathan Wakely  <jwakely@redhat.com>

	* doc/xml/manual/status_cxx2023.xml: Update status of proposal
	implemented after GCC 14.2 release.
	* doc/html/manual/status.html: Regenerate.

2025-05-06  Dhruv Chawla  <dhruvc@nvidia.com>

	Backported from master:
	2025-05-02  Dhruv Chawla  <dhruvc@nvidia.com>

	* include/std/memory: Define __glibcxx_want_addressof_constexpr.
	* testsuite/20_util/headers/memory/version.cc: Test for macro
	value.

2025-04-30  François Dumont  <frs.dumont@gmail.com>

	Backported from master:
	2025-04-30  François Dumont  <frs.dumont@gmail.com>
		    Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/lib/libstdc++.exp (v3_target_compile): Strip version namespace
	from compiler output.
	* testsuite/20_util/function/cons/70692.cc: Remove now useless __8 namespace
	pattern.
	* testsuite/23_containers/map/48101_neg.cc: Likewise.
	* testsuite/23_containers/multimap/48101_neg.cc: Likewise.

2025-04-29  Patrick Palka  <ppalka@redhat.com>

	Backported from master:
	2025-02-28  Patrick Palka  <ppalka@redhat.com>

	PR libstdc++/104606
	* include/std/optional (operator<=>): Revert r14-9771 change.
	Add constraint checking the validity of the return type
	compare_three_way_result_t before the three_way_comparable_with
	constraint.

2025-04-29  Patrick Palka  <ppalka@redhat.com>

	Backported from master:
	2025-02-26  Patrick Palka  <ppalka@redhat.com>

	PR libstdc++/118083
	* include/bits/ranges_base.h
	(ranges::__access::__possibly_const_range): Mention LWG 4027.

2025-04-29  Patrick Palka  <ppalka@redhat.com>

	Backported from master:
	2025-02-25  Patrick Palka  <ppalka@redhat.com>

	PR libstdc++/118083
	* include/bits/ranges_base.h
	(ranges::__access::__possibly_const_range): Adjust logic as per
	LWG 4027.  Add missing input_range constraint.
	* testsuite/std/ranges/access/cbegin.cc (test05): Verify LWG
	4027 testcases.
	* testsuite/std/ranges/access/cdata.cc: Adjust, simplify and
	consolidate some tests after the above.
	* testsuite/std/ranges/access/cend.cc: Likewise.
	* testsuite/std/ranges/access/crbegin.cc: Likewise.
	* testsuite/std/ranges/access/crend.cc: Likewise.
	* testsuite/std/ranges/adaptors/join.cc: Likewise.
	* testsuite/std/ranges/adaptors/take_while.cc: Likewise.
	* testsuite/std/ranges/adaptors/transform.cc: Likewise.

2025-04-17  Tomasz Kamiński  <tkaminsk@redhat.com>

	Backported from master:
	2025-03-12  Tomasz Kamiński  <tkaminsk@redhat.com>

	* include/std/format (formatter<_Float16, _CharT>): Define only if
	_GLIBCXX_FLOAT_IS_IEEE_BINARY32 macro is defined.
	(formatter<_Float16, _CharT>): As above.
	(formatter<__gnu_cxx::__bfloat16_t, _CharT>): As above.
	(formatter<_Float64, _CharT>): Define only if
	_GLIBCXX_DOUBLE_IS_IEEE_BINARY64 is defined.
	(basic_format_arg::_S_to_arg_type): Normalize _Float32 and _Float64
	only to float and double respectivelly.
	(basic_format_arg::_S_to_enum): Remove handling of _Float32 and _Float64.

2025-04-16  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/numeric: Only mention ranges::iota in comment.

2025-04-16  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/17_intro/names.cc: Check ranges is not used as an
	identifier before C++20.

2025-04-16  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2025-04-15  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/ranges (__glibcxx_want_ranges_iota): Do not
	define.

2025-04-16  Michael Levine  <mlevine55@bloomberg.net>

	Backported from master:
	2024-06-08  Michael Levine  <mlevine55@bloomberg.net>

	PR libstdc++/108760
	* include/bits/ranges_algo.h (ranges::out_value_result)
	(ranges::iota_result, ranges::__iota_fn, ranges::iota): Move to
	<bits/ranges_algobase.h>.
	* include/bits/ranges_algobase.h (ranges::out_value_result):
	(ranges::iota_result, ranges::__iota_fn, ranges::iota): Move to
	here.
	* include/std/numeric: Include <bits/ranges_algobase.h>.
	* testsuite/25_algorithms/iota/1.cc: Renamed to ...
	* testsuite/26_numerics/iota/2.cc: ... here.

2025-04-16  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2025-02-28  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/105609
	* include/bits/ranges_algobase.h (__detail::__assign_one): New
	helper function.
	(__copy_or_move, __copy_or_move_backward): Use new function
	instead of std::__assign_one.
	* testsuite/25_algorithms/move/constrained.cc: Check that
	ADL iter_move is used in preference to std::move.
	* testsuite/25_algorithms/move_backward/constrained.cc:
	Likewise.

2025-04-16  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-10-18  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/ranges_algobase.h (ranges::__assign_one): Remove.
	(__copy_or_move, __copy_or_move_backward): Use std::__assign_one
	instead of ranges::__assign_one.

2025-04-16  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-10-13  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/117121
	* include/bits/ranges_algobase.h (copy_backward): Decrement
	output iterator before assigning one element through it.
	* testsuite/25_algorithms/copy/108846.cc: Ensure the algorithm's
	effects are correct for a single memcpyable element.
	* testsuite/25_algorithms/copy_backward/108846.cc: Likewise.
	* testsuite/25_algorithms/copy_n/108846.cc: Likewise.

2025-04-16  Giuseppe D'Angelo  <giuseppe.dangelo@kdab.com>

	Backported from master:
	2024-09-13  Giuseppe D'Angelo  <giuseppe.dangelo@kdab.com>

	PR libstdc++/108846
	PR libstdc++/116471
	* include/bits/ranges_algobase.h (__assign_one): New helper
	function.
	(__copy_or_move): Remove a spurious static_assert; use
	__assign_one for memcpyable ranges of length 1.
	(__copy_or_move_backward): Likewise.
	* testsuite/25_algorithms/copy/108846.cc: Extend to range-based
	algorithms, and cover both memcpyable and non-memcpyable
	cases.
	* testsuite/25_algorithms/copy_backward/108846.cc: Likewise.
	* testsuite/25_algorithms/copy_n/108846.cc: Likewise.
	* testsuite/25_algorithms/move/108846.cc: Likewise.
	* testsuite/25_algorithms/move_backward/108846.cc: Likewise.

2025-04-16  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-06-07  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/ranges_algobase.h: Include <bits/stl_algobase.h>.

2025-04-15  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2025-04-14  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/21334
	* doc/xml/manual/using.xml: Document that container data race
	avoidance rules do not apply to COW std::string.
	* doc/html/*: Regenerate.

2025-04-10  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-11-07  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/115285
	* include/bits/hashtable.h (_Hashtable::_S_forward_key): Remove.
	(_Hashtable::_M_insert_unique_aux): Replace _S_forward_key with
	a static_cast to a type defined using conditional_t.
	(_Hashtable::_M_insert): Replace _ConvertToValueType with a
	static_cast to a type defined using conditional_t.
	* include/bits/hashtable_policy.h (_ConvertToValueType): Remove.
	* testsuite/23_containers/unordered_map/insert/115285.cc: New test.
	* testsuite/23_containers/unordered_set/insert/115285.cc: New test.
	* testsuite/23_containers/unordered_set/96088.cc: Adjust
	expected number of allocations.

2025-04-10  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-11-07  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/stl_pair.h (__is_pair): Define for C++11 and
	C++14 as well.

2025-04-10  François Dumont  <frs.dumont@gmail.com>

	Backported from master:
	2024-10-24  François Dumont  <frs.dumont@gmail.com>

	* testsuite/23_containers/unordered_map/96088.cc (test03): Fix increments
	value when _GLIBCXX_USE_CXX11_ABI is equal to 0.

2025-04-10  François Dumont  <frs.dumont@gmail.com>

	Backported from master:
	2024-10-23  François Dumont  <frs.dumont@gmail.com>

	PR libstdc++/115285
	* include/bits/hashtable.h (_S_forward_key<_Kt>): Always return a temporary
	key_type instance.
	* testsuite/23_containers/unordered_map/96088.cc: Adapt to additional instanciation.
	Also check that mapped_type is not instantiated when there is no insertion.
	* testsuite/23_containers/unordered_multimap/96088.cc: Adapt to additional
	instanciation.
	* testsuite/23_containers/unordered_multiset/96088.cc: Likewise.
	* testsuite/23_containers/unordered_set/96088.cc: Likewise.
	* testsuite/23_containers/unordered_set/pr115285.cc: New test case.

2025-04-09  Patrick Palka  <ppalka@redhat.com>

	Backported from master:
	2025-04-09  Patrick Palka  <ppalka@redhat.com>

	PR libstdc++/115046
	PR libstdc++/112490
	* include/bits/stl_iterator.h (basic_const_iterator::operator-):
	Replace non-dependent basic_const_iterator function parameter with
	a dependent one of type basic_const_iterator<_It2> where _It2
	matches _It.
	* testsuite/std/ranges/adaptors/as_const/1.cc (test04): New test.

2025-04-08  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2025-04-08  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/119671
	* include/std/format (__formatter_fp::format): Do not invalidate
	__wstr unless _M_localized returns a valid string.
	* testsuite/std/format/functions/format.cc: Check wide string
	formatting of floating-point types with classic locale.

2025-04-08  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2025-04-07  Jonathan Wakely  <jwakely@redhat.com>

	* doc/doxygen/user.cfg.in (INPUT): Add text_encoding.

2025-04-08  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2025-04-04  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/101587
	* include/bits/ranges_uninitialized.h (__detail::__mindist):
	Remove.
	(ranges::uninitialized_copy, ranges::uninitialized_copy_n)
	(ranges::uninitialized_move, ranges::uninitialized_move_n): Use
	comparison and assignment instead of __mindist.
	* testsuite/20_util/specialized_algorithms/uninitialized_copy/constrained.cc:
	Check with ranges that use integer-like class type for
	difference type.
	* testsuite/20_util/specialized_algorithms/uninitialized_move/constrained.cc:
	Likewise.

2025-04-08  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2025-03-27  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/101587
	* include/bits/ranges_uninitialized.h (__detail::__mindist):
	New function object.
	(ranges::uninitialized_copy, ranges::uninitialized_copy_n)
	(ranges::uninitialized_move, ranges::uninitialized_move_n): Use
	__mindist instead of std::min.
	* testsuite/20_util/specialized_algorithms/uninitialized_copy/constrained.cc:
	Check ranges with difference difference types.
	* testsuite/20_util/specialized_algorithms/uninitialized_move/constrained.cc:
	Likewise.

2025-04-07  Patrick Palka  <ppalka@redhat.com>

	Backported from master:
	2025-03-13  Patrick Palka  <ppalka@redhat.com>

	PR libstdc++/116440
	* include/std/tuple (tuple::tuple(const _Elements&...))
	[C++20]: Turn into a template.
	* testsuite/20_util/tuple/116440.C: New test.

2025-04-03  Tomasz Kamiński  <tkaminsk@redhat.com>

	Backported from master:
	2025-04-03  Tomasz Kamiński  <tkaminsk@redhat.com>

	* testsuite/std/format/functions/format.cc: Restored line.

2025-04-03  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/119593
	* include/bits/unicode.h
	(__unicode::__literal_encoding_is_unicode<_CharT>):
	Corrected handing for UTF-16 and UTF-32 with "LE" or "BE" suffix.
	* include/std/format (__formatter_str::_S_character_width):
	Define.
	(__formatter_str::_S_character_width): Updated passed char
	length.
	* testsuite/std/format/functions/format.cc: Test for wchar_t.

2025-04-02  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2025-03-27  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/119469
	* include/bits/iterator_concepts.h (_IterMove::__result): Use
	decltype-specifier instead of an explicit type.
	* testsuite/24_iterators/customization_points/iter_move.cc:
	Check results for function references.

2025-04-02  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2025-02-28  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/106612
	* include/bits/iterator_concepts.h (_IterMove::__iter_ref_t):
	New alias template.
	(_IterMove::__result): Use __iter_ref_t instead of
	std::iter_reference_t.
	(_IterMove::__type): Remove incorrect __dereferenceable
	constraint.
	(_IterMove::operator()): Likewise. Add correct constraints. Use
	__iter_ref_t instead of std::iter_reference_t. Forward parameter
	as correct value category.
	(iter_swap): Add comments.
	* testsuite/24_iterators/customization_points/iter_move.cc: Test
	that iter_move is found by ADL and that rvalue arguments are
	handled correctly.

2025-04-02  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2025-03-31  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/110498
	* include/bits/vector.tcc (vector<bool, A>::_M_reallocate):
	Hoist loads of begin() and end() before allocation and use them
	to state an unreachable condition.
	* testsuite/23_containers/vector/bool/capacity/110498.cc: New
	test.

2025-04-02  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2025-03-31  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/114758
	* include/bits/vector.tcc (vector<bool, A>::_M_fill_insert):
	Hoist loads of begin() and end() before allocation.
	* testsuite/23_containers/vector/bool/capacity/114758.cc: New
	test.

2025-04-02  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2025-03-28  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/117983
	* include/bits/vector.tcc (vector::_M_range_insert): Add
	unreachable condition to tell the compiler begin() <= end().
	* testsuite/23_containers/vector/modifiers/insert/117983.cc: New
	test.

2025-04-02  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2025-04-01  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/114945
	* include/bits/vector.tcc (vector::_M_default_append): Add
	unreachable condition so the compiler knows that _M_finish is
	not null.
	* testsuite/23_containers/vector/capacity/114945.cc: New test.

2025-04-01  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/116212
	* testsuite/20_util/specialized_algorithms/uninitialized_move/constrained.cc:
	Use unsigned for vector size.

2025-04-01  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-06-13  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/ranges_base.h (range_common_reference_t): New
	alias template, as per LWG 3860.
	* testsuite/std/ranges/range.cc: Check it.

2025-04-01  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2025-01-16  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/stl_map.h: Check __glibcxx_node_extract instead
	of __cplusplus.
	* include/bits/stl_multimap.h: Likewise.
	* include/bits/stl_multiset.h: Likewise.
	* include/bits/stl_set.h: Likewise.
	* include/bits/stl_tree.h: Likewise.

2025-04-01  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2025-03-12  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/future (packaged_task::packaged_task(F&&)): Add
	static_assert.
	* testsuite/30_threads/packaged_task/cons/dangling_ref.cc: Add
	dg-error for new static assertion.
	* testsuite/30_threads/packaged_task/cons/lwg4154_neg.cc: New
	test.

2025-04-01  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2025-03-25  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/118699
	* testsuite/27_io/filesystem/operations/copy.cc: Check copying a
	file to a directory.

2025-03-31  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2025-03-24  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/101527
	* testsuite/24_iterators/common_iterator/101527.cc: New test.
	* testsuite/24_iterators/counted_iterator/101527.cc: New test.

2025-03-31  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2025-03-04  Jonathan Wakely  <jwakely@redhat.com>

	* doc/xml/manual/test.xml: Remove stray comma.
	* doc/html/manual/test.html: Regenerate.

2025-03-31  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2025-03-07  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/forward_list (erase): Change lambda to have
	explicit return type and const parameter type.
	* include/std/list (erase): Likewise.
	* testsuite/23_containers/forward_list/erasure.cc: Check lambda
	is correct.
	* testsuite/23_containers/list/erasure.cc: Likewise.

2025-03-31  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2025-03-24  Jonathan Wakely  <jwakely@redhat.com>

	* doc/xml/manual/policy_data_structures_biblio.xml: Fix two
	broken links.
	* doc/html/manual/policy_data_structures.html: Regenerate.

2025-03-31  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2025-03-25  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/108487
	* include/bits/stl_vector.h (vector(initializer_list)): Call
	_M_range_initialize_n instead of _M_range_initialize.
	(vector(InputIterator, InputIterator)): Use _M_range_initialize_n
	for C++20 sized sentinels and forward iterators.
	(vector::_M_range_initialize(FwIt, FwIt, forward_iterator_tag)):
	Use _M_range_initialize_n.
	(vector::_M_range_initialize_n): New function.
	* testsuite/23_containers/vector/cons/108487.cc: New test.

2025-03-31  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2025-03-27  Jonathan Wakely  <jwakely@redhat.com>

	* src/c++20/tzdata.zi: Import new file from 2025b release.

2025-03-31  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2025-03-12  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/chrono (__detail::__get_leap_second_info): Update
	expiry date for leap seconds list.
	* src/c++20/tzdata.zi: Import new file from 2025a release.
	* src/c++20/tzdb.cc (tzdb_list::_Node::_S_read_leap_seconds)
	Update expiry date for leap seconds list.

2025-03-26  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2025-03-25  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/ranges (ranges::to): Allow unions as well as
	non-union class types.
	* testsuite/std/ranges/conv/lwg4229.cc: New test.

2025-03-26  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2025-02-28  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/112803
	* include/std/ranges (ranges::to): Add static assertions to
	enforce Mandates conditions.
	* testsuite/std/ranges/conv/112803.cc: New test.

2025-03-26  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2025-03-25  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/119429
	* include/std/format (__format::_Scanner::_Scanner): Cast
	default argument to size_t.

2025-03-26  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-08-23  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/115939
	* include/bits/hashtable_policy.h (_Node_iterator): Add
	operator== and operator!=.
	(_Node_const_iterator): Likewise.
	* testsuite/23_containers/unordered_map/115939.cc: New test.

2025-03-25  Patrick Palka  <ppalka@redhat.com>

	Backported from master:
	2025-03-13  Patrick Palka  <ppalka@redhat.com>

	PR libstdc++/119135
	* include/std/ranges: Include <utility>.
	(views::__detail::__is_ref_view): Replace with ...
	(views::__detail::__is_constable_ref_view): ... this.
	(views::_AsConst::operator()): Replace bogus use of element_type
	in the ref_view branch.
	* testsuite/std/ranges/adaptors/as_const/1.cc (test03): Extend
	test.

2025-03-21  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2025-03-19  Jonathan Wakely  <jwakely@redhat.com>

	* doc/xml/manual/test.xml: Fix default for -std option.
	* doc/html/manual/test.html: Regenerate.

2025-03-21  Jakub Jelinek  <jakub@redhat.com>

	Backported from master:
	2025-03-20  Jakub Jelinek  <jakub@redhat.com>

	* testsuite/18_support/numeric_limits/traps.cc (main): Fix comment
	typo.

2025-03-21  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2025-03-19  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/locale_facets_nonio.tcc (time_put::do_put): Fix
	typo in comment.

2025-03-18  Patrick Palka  <ppalka@redhat.com>

	Backported from master:
	2025-02-28  Patrick Palka  <ppalka@redhat.com>

	PR libstdc++/112490
	* include/bits/stl_iterator.h (basic_const_iterator::operator<):
	Replace non-dependent basic_const_iterator function parameter with
	a dependent one of type basic_const_iterator<_It3> where _It3
	matches _It.
	(basic_const_iterator::operator>): Likewise.
	(basic_const_iterator::operator<=): Likewise.
	(basic_const_iterator::operator>=): Likewise.
	* testsuite/24_iterators/const_iterator/112490.cc: New test.

2025-03-05  Tomasz Kamiński  <tkaminsk@redhat.com>

	Backported from master:
	2025-03-05  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/119121
	* include/bits/ranges_util.h (__detail::__pair_like_convertible_from):
	Use `_Tp` in `is_reference_v` check
	* testsuite/std/ranges/subrange/tuple_like.cc: New tests for
	pair-like conversion

2025-02-28  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2025-02-20  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/118811
	* src/c++20/tzdb.cc (tzdb_list::_Node): Move definitions of
	static data members to new header.
	* src/c++20/tzdb_globals.h: New header. Use init_priority
	attribute on static data members.
	* testsuite/std/time/tzdb_list/pr118811.cc: New test.

2025-02-28  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-08-23  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/tuple: Do not include implementation details in
	Doxygen documentation.

2025-02-28  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2025-02-27  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/stacktrace (_Impl::_M_allocate): Fix outdated
	comment.

2025-02-28  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-06-03  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/stacktrace (basic_stacktrace::_Impl::_M_allocate):
	Use __detail::__get_temporary_buffer.
	(basic_stacktrace::_Impl::_M_deallocate): Use
	__detail::__return_temporary_buffer.

2025-02-28  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-06-03  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/string_view (starts_with(basic_string_view)):
	Compare lengths first and then call traits_type::compare
	directly.

2025-02-28  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-06-28  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/104395
	* include/bits/new_allocator.h: Disable extended alignment
	support in C++98 mode.
	* include/bits/stl_tempbuf.h: Likewise.
	* include/ext/bitmap_allocator.h: Likewise.
	* include/ext/malloc_allocator.h: Likewise.
	* include/ext/mt_allocator.h: Likewise.
	* include/ext/pool_allocator.h: Likewise.
	* testsuite/ext/104395.cc: New test.

2025-02-28  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-06-19  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/stl_tempbuf.h (__get_temporary_buffer): Cast
	argument to size_t to handle negative values and suppress
	-Wsign-compare warning.
	(_Temporary_buffer): Move diagnostic pragmas to new location of
	call to std::get_temporary_buffer.

2025-02-28  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-06-03  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/105258
	* include/bits/stl_tempbuf.h (__detail::__get_temporary_buffer):
	New function to do allocation for get_temporary_buffer, with
	extended alignment support.
	(__detail::__return_temporary_buffer): Support extended
	alignment.
	(get_temporary_buffer): Use __get_temporary_buffer.
	(return_temporary_buffer): Support extended alignment. Add
	deprecated attribute.
	(_Temporary_buffer): Move allocation and deallocation into a
	subobject and remove try-catch block in constructor.
	(__uninitialized_construct_buf): Use argument deduction for
	value type.
	* testsuite/20_util/temporary_buffer.cc: Add dg-warning for new
	deprecated warning.
	* testsuite/25_algorithms/stable_sort/overaligned.cc: New test.

2025-02-28  Giuseppe D'Angelo  <giuseppe.dangelo@kdab.com>

	Backported from master:
	2025-02-07  Giuseppe D'Angelo  <giuseppe.dangelo@kdab.com>

	PR libstdc++/118160
	PR libstdc++/100249
	* include/bits/ranges_algo.h (__is_permutation_fn): Avoid a
	dangling reference by storing the result of the iterator
	dereference and the result of the projection in two distinct
	variables, in order to lifetime-extend each one.
	Forward the projected value to the predicate.
	* testsuite/25_algorithms/is_permutation/constrained.cc: Add a
	test with a range returning prvalues. Test it in a constexpr
	context, in order to rely on the compiler to catch UB.

2025-02-28  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-06-21  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/stl_uninitialized.h (uninitialized_default_construct)
	(uninitialized_default_construct_n, uninitialized_value_construct)
	(uninitialized_value_construct_n): Qualify calls to prevent ADL.

2025-02-28  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-12-18  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/basic_string.h (__to_wstring_numeric): Add 'i'
	and 'I' to mapping.

2025-02-28  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-12-09  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/117921
	* testsuite/23_containers/set/modifiers/swap/adl.cc: Add
	equality comparison for Allocator.
	* testsuite/23_containers/unordered_set/modifiers/swap-2.cc:
	Likewise.

2025-02-28  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-12-05  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/117921
	* include/bits/hashtable_policy.h (_Hash_code_base::_M_swap):
	Use ADL swap for Hash members.
	(_Hashtable_base::_M_swap): Use ADL swap for _Equal members.
	* include/bits/stl_tree.h (_Rb_tree::swap): Use ADL swap for
	_Compare members.
	* testsuite/23_containers/set/modifiers/swap/adl.cc: New test.
	* testsuite/23_containers/unordered_set/modifiers/swap-2.cc: New
	test.

2025-02-28  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-11-27  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/forward_list.h (forward_list::front): Add
	non-empty assertions.
	* include/bits/stl_list.h (list::front, list::back): Add
	non-empty assertions.

2025-02-28  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2025-01-16  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/118158
	* src/c++17/fs_ops.cc (fs::equivalent): Remove error reporting
	for is_other(s1) && is_other(s2) case, as per LWG 2937.
	* testsuite/27_io/filesystem/operations/pr118158.cc: New test.

2025-01-29  Patrick Palka  <ppalka@redhat.com>

	Backported from master:
	2025-01-29  Patrick Palka  <ppalka@redhat.com>

	PR libstdc++/118413
	* include/std/ranges (views::__adaptor::_Partial): Adjust
	constraints on the "simple" partial specializations to require
	is_trivially_copy_constructible_v instead of
	is_trivially_copyable_v.
	* testsuite/std/ranges/adaptors/adjacent_transform/1.cc (test04):
	Extend P2494R2 test.
	* testsuite/std/ranges/adaptors/transform.cc (test09): Likewise.

2025-01-27  Giuseppe D'Angelo  <giuseppe.dangelo@kdab.com>

	Backported from master:
	2025-01-20  Giuseppe D'Angelo  <giuseppe.dangelo@kdab.com>

	PR libstdc++/118185
	PR libstdc++/100249
	* include/bits/ranges_algo.h (__clamp_fn): Correctly forward the
	projected value to the comparator.
	* testsuite/25_algorithms/clamp/118185.cc: New test.

2025-01-16  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2025-01-15  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/109849
	* include/bits/vector.tcc (vector::_M_range_insert): Fix
	reversed args in length calculation.

2025-01-16  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-09-27  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/istream.tcc: Add diagnostic pragmas around uses
	of long long and extern template.
	* include/bits/locale_facets.h: Likewise.
	* include/bits/locale_facets.tcc: Likewise.
	* include/bits/locale_facets_nonio.tcc: Likewise.
	* include/bits/ostream.tcc: Likewise.
	* include/bits/stl_algobase.h: Likewise.
	* include/c_global/cstdlib: Likewise.
	* include/ext/pb_ds/detail/resize_policy/hash_prime_size_policy_imp.hpp:
	Likewise.
	* include/ext/pointer.h: Likewise.
	* include/ext/stdio_sync_filebuf.h: Likewise.
	* include/std/istream: Likewise.
	* include/std/ostream: Likewise.
	* include/tr1/cmath: Likewise.
	* include/tr1/type_traits: Likewise.
	* include/tr1/functional_hash.h: Likewise. Remove semi-colons
	at namespace scope that aren't needed after macro expansion.
	* include/tr1/tuple: Remove semi-colon at namespace scope.
	* include/bits/vector.tcc: Change LL suffix to just L.

2025-01-16  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2025-01-08  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/90389
	* include/bits/deque.tcc (_M_insert_aux): Rename variadic
	overload to _M_emplace_aux.
	* include/bits/stl_deque.h (_M_insert_aux): Define inline.
	(_M_emplace_aux): Declare.
	* testsuite/23_containers/deque/modifiers/emplace/90389.cc: New
	test.

2025-01-12  Torbjörn SVENSSON  <torbjorn.svensson@foss.st.com>

	Backported from master:
	2025-01-12  Torbjörn SVENSSON  <torbjorn.svensson@foss.st.com>

	* testsuite/27_io/print/1.cc: Allow both LF and CRLF in test.
	* testsuite/27_io/print/3.cc: Likewise.

2025-01-12  Torbjörn SVENSSON  <torbjorn.svensson@foss.st.com>

	Backported from master:
	2025-01-12  Torbjörn SVENSSON  <torbjorn.svensson@foss.st.com>

	* testsuite/29_atomics/atomic_float/compare_exchange_padding.cc:
	Use effective-target libatomic_available.

2025-01-10  Tamar Christina  <tamar.christina@arm.com>

	* include/bits/hashtable.h (find): Add inline keyword.

2025-01-09  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-12-10  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/memory_resource.h (polymoprhic_allocator): Use
	feature test macro for P0339R6 features.

2025-01-09  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-08-23  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/alloc_traits.h: Improve doxygen docs for
	allocator_traits specializations.
	* include/bits/memory_resource.h: Likewise.

2025-01-09  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-06-21  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/memory_resource.h (polymorphic_allocator::destroy):
	Remove deprecated attribute.

2025-01-09  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-05-15  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/89624
	* include/bits/atomic_base.h (memory_order): Use int as
	underlying type.
	* testsuite/29_atomics/atomic/89624.cc: New test.

2025-01-09  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-12-12  Jonathan Wakely  <jwakely@redhat.com>

	* src/c++17/fs_dir.cc: Fix typo in comment.

2025-01-09  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-12-11  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/ostream (println): Pass stream's locale to
	std::format, as per LWG 4088.
	* testsuite/27_io/basic_ostream/print/1.cc: Check std::println
	with custom locale. Remove unused brit_punc class.

2025-01-09  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-10-30  Jonathan Wakely  <jwakely@redhat.com>

	* doc/xml/manual/using_exceptions.xml: Fix typos and grammatical
	errors.
	* doc/html/manual/using_exceptions.html: Regenerate.

2025-01-09  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-05-14  Jonathan Wakely  <jwakely@redhat.com>

	* doc/xml/manual/strings.xml: Clarify that GCC 4.5 added
	std::string::shrink_to_fit.
	* doc/html/manual/strings.html: Regenerate.

2025-01-09  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-11-27  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/c++config (__glibcxx_assert): Remove useless
	__builtin_expect from constexpr-only assertion. Improve
	comments.

2025-01-09  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-12-03  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/108236
	* include/pstl/glue_numeric_impl.h (exclusive_scan): Pass __init
	as rvalue.
	* include/pstl/numeric_impl.h (__brick_transform_scan): Do not
	write through __result until after reading through __first. Move
	__init into return value.
	(__pattern_transform_scan): Pass __init as rvalue.
	* include/std/numeric (exclusive_scan): Move construct instead
	of copy constructing.
	* testsuite/26_numerics/exclusive_scan/2.cc: New test.
	* testsuite/26_numerics/pstl/numeric_ops/108236.cc: New test.

2025-01-09  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-12-09  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/117962
	* include/debug/safe_container.h: Make allocator-extended move
	constructor a no-op during constant evaluation.

2025-01-09  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-12-11  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/109517
	PR libstdc++/109976
	* include/debug/helper_functions.h (__valid_range_aux): Treat
	all input iterator ranges as valid during constant evaluation.

2025-01-09  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-12-11  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/106212
	* include/std/array (operator==): Use std::__equal_aux1 instead
	of std::equal.
	* testsuite/23_containers/array/comparison_operators/106212.cc:
	New test.

2025-01-09  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-12-11  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/117966
	* include/std/span (span(T (&)[N])): Do not delegate to
	constructor that performs redundant checks.
	(span(array<T, N>&), span(const array<T, N>&)): Likewise.
	(span(Range&&), span(const span<T, N>&)): Likewise.
	* testsuite/23_containers/span/117966.cc: New test.

2025-01-09  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-12-17  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/118035
	* include/bits/deque.tcc (_M_range_insert_aux): Return
	immediately if inserting an empty range.
	* testsuite/23_containers/deque/modifiers/insert/118035.cc: New
	test.

2025-01-09  Patrick Palka  <ppalka@redhat.com>

	Backported from master:
	2024-12-13  Patrick Palka  <ppalka@redhat.com>

	PR libstdc++/112349
	* include/bits/ranges_algo.h (__min_fn::operator()): Turn local
	object __tmp into a reference.
	* include/bits/ranges_util.h (__max_fn::operator()): Likewise.
	* testsuite/25_algorithms/max/constrained.cc (test04): New test.
	* testsuite/25_algorithms/min/constrained.cc (test04): New test.

2025-01-09  Patrick Palka  <ppalka@redhat.com>

	Backported from master:
	2024-11-14  Patrick Palka  <ppalka@redhat.com>

	* include/std/ranges (keys_view): Adjust as per LWG 3563.
	(values_view): Likewise.
	* testsuite/std/ranges/adaptors/elements.cc (test08): New test.

2025-01-09  Patrick Palka  <ppalka@redhat.com>

	Backported from master:
	2024-10-29  Patrick Palka  <ppalka@redhat.com>

	PR libstdc++/112641
	* include/std/ranges (drop_view::begin): Reimplement const
	overload so that it's O(1) always.
	* testsuite/std/ranges/adaptors/drop.cc (test10): New test.

2025-01-09  Gerald Pfeifer  <gerald@pfeifer.com>

	Backported from master:
	2024-08-17  Gerald Pfeifer  <gerald@pfeifer.com>

	* doc/xml/manual/abi.xml: Update reference to
	gcc.gnu.org/onlinedocs.
	* doc/xml/manual/concurrency_extensions.xml (interface): Ditto.
	* doc/xml/manual/extensions.xml: Ditto.
	* doc/xml/manual/parallel_mode.xml: Ditto.
	* doc/xml/manual/shared_ptr.xml: Ditto.
	* doc/xml/manual/using_exceptions.xml: Ditto. And change GNU GCC
	to GCC.
	* doc/html/index.html: Regenerate.
	* doc/html/manual/abi.html: Ditto.
	* doc/html/manual/ext_concurrency_impl.html: Ditto.
	* doc/html/manual/ext_demangling.html: Ditto.
	* doc/html/manual/memory.html: Ditto.
	* doc/html/manual/parallel_mode_design.html: Ditto.
	* doc/html/manual/parallel_mode_using.html: Ditto.
	* doc/html/manual/using_exceptions.html: Ditto.

2025-01-09  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2025-01-08  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/118093
	* include/bits/atomic_futex.h (_M_load_and_test_until_impl):
	Return false for times before the epoch.
	* src/c++11/futex.cc (_M_futex_wait_until): Extend check for
	negative times to check for subsecond times. Add unlikely
	attribute.
	(_M_futex_wait_until_steady): Likewise.
	* testsuite/30_threads/future/members/118093.cc: New test.

2025-01-09  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2025-01-08  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/move.h (forward, move, move_if_noexcept, addressof):
	Add @since to Doxygen comments.
	(forward_like): Add Doxygen comment.

2025-01-09  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2025-01-08  Jonathan Wakely  <jwakely@redhat.com>

	* doc/xml/manual/evolution.xml: Replace invalid <variable>
	elements with <varname>.
	* doc/html/*: Regenerate.

2024-12-16  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-12-07  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/format: Fix typo in Doxygen comment.

2024-12-02  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-09-22  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/stl_vector.h (operator<=>): Use constexpr
	instead of _GLIBCXX20_CONSTEXPR macro.

2024-12-02  Jason Merrill  <jason@redhat.com>

	Backported from master:
	2024-08-28  Jason Merrill  <jason@redhat.com>

	* include/std/istream: Add cast to avoid -Wsign-compare.
	* include/std/stacktrace: Likewise.

2024-12-02  Jason Merrill  <jason@redhat.com>

	Backported from master:
	2024-08-28  Jason Merrill  <jason@redhat.com>

	* testsuite/20_util/default_delete/void_neg.cc: Fix regexp quoting.

2024-12-02  Jason Merrill  <jason@redhat.com>

	Backported from master:
	2024-08-28  Jason Merrill  <jason@redhat.com>

	* include/std/coroutine (coroutine_handle): Use nullptr instead of
	0 as initializer for _M_fr_ptr.

2024-12-02  Jason Merrill  <jason@redhat.com>

	Backported from master:
	2024-08-28  Jason Merrill  <jason@redhat.com>

	* include/decimal/decimal.h (_DEFINE_DECIMAL_BINARY_OP_WITH_INT):
	Remove redundant semicolons.

2024-12-02  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-08-28  Jonathan Wakely  <jwakely@redhat.com>

	* include/experimental/io_context: Remove name of unused
	parameter.
	* include/experimental/socket: Add [[maybe_unused]] attribute.

2024-12-02  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-09-22  Jonathan Wakely  <jwakely@redhat.com>

	* src/c++11/cxx11-ios_failure.cc (__iosfail_type_info): Unhide
	the three-arg overload of __do_upcast.

2024-12-02  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-09-22  Jonathan Wakely  <jwakely@redhat.com>

	* libsupc++/exception_ptr.h (__exception_ptr::_M_safe_bool_dummy):
	Remove __attribute__((const)) from function returning void.

2024-12-02  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-08-28  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/ranges (to): Remove unused typedef.

2024-12-02  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-11-07  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/hashtable.h (_M_insert_unique_node): Improve
	comment.

2024-12-02  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-11-14  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/ranges_util.h (subrange::begin): Fix constraint,
	as per LWG 3589.
	* testsuite/std/ranges/subrange/lwg3589.cc: New test.

2024-12-02  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-11-01  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/unordered_map.h: Check __glibcxx_node_extract and
	__glibcxx_unordered_map_try_emplace instead of __cplusplus.
	* include/bits/unordered_set.h: Check __glibcxx_node_extract
	instead of __cplusplus.

2024-12-02  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-10-11  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/cpp_type_traits.h (__is_byte<byte>): Guard with
	__glibcxx_byte macro instead of checking __cplusplus.

2024-12-02  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-11-14  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/ranges_algo.h (__is_permutation_fn::operator()):
	Short-circuit for sized ranges with different sizes, as per LWG
	3560.
	* include/bits/ranges_algobase.h (__equal_fn::operator()):
	Likewise.
	* include/bits/stl_algo.h (__is_permutation): Use if-constexpr
	for random access iterator branches.
	* include/bits/stl_algobase.h (__equal4): Likewise.
	* testsuite/25_algorithms/equal/lwg3560.cc: New test.
	* testsuite/25_algorithms/is_permutation/lwg3560.cc: New test.

2024-12-02  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-10-15  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/106676
	* include/bits/iterator_concepts.h (__cpp17_fwd_iterator): Use
	is_reference instead of is_value_reference.
	rvalue references.
	* include/std/ranges (transform_view:__iter_cat::_S_iter_cat):
	Likewise.
	(zip_transform_view::__iter_cat::_S_iter_cat): Likewise.
	(adjacent_transform_view::__iter_cat::_S_iter_cat): Likewise.
	(join_with_view::__iter_cat::_S_iter_cat): Likewise.
	* testsuite/std/ranges/adaptors/transform.cc: Check
	iterator_category when the transformation function returns an
	rvalue reference type.

2024-12-02  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-09-27  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/basic_string.tcc (resize_for_overwrite): Fix
	-Wsign-compare warning.
	* include/bits/cow_string.h (resize_for_overwrite): Likewise.

2024-12-02  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-10-27  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/stl_bvector.h (emplace_back, emplace): Forward
	parameter pack to preserve value category.
	* testsuite/23_containers/vector/bool/emplace_rvalue.cc: New
	test.

2024-12-02  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-11-07  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/hashtable.h: Fix spelling in comment.

2024-12-02  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-11-01  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/hashtable.h: Improve comments.

2024-12-02  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-11-14  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/117560
	* include/bits/fs_dir.h (enable_borrowed_range, enable_view):
	Define specializations for directory iterators, as per LWG 3480.
	* testsuite/27_io/filesystem/iterators/lwg3480.cc: New test.

2024-12-02  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-11-13  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/util/testsuite_performance.h (time_counter): Add
	comment about times.
	(time_counter::system_time): Use correct split value.

2024-12-02  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-11-13  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/util/testsuite_performance.h: Use
	__gnu_cxx::__is_single_threaded instead of __gthread_active_p().

2024-12-02  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-11-14  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/stl_iterator.h (operator+): Add constraint to
	move_iterator operator.
	* testsuite/24_iterators/move_iterator/rel_ops_c++20.cc:

2024-12-02  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-11-28  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/117822
	* include/std/stacktrace (stacktrace(stacktrace&&, const A&)):
	Fix typo in qualified-id for is_always_equal trait.
	* testsuite/19_diagnostics/stacktrace/stacktrace.cc: Test
	allocator-extended constructors and allocator propagation.

2024-12-02  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-09-26  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/stacktrace (basic_stacktrace::_Impl::_M_allocate):
	Do not assume allocators only throw std::bad_alloc.

2024-11-12  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/unicode.h (_Utf_iterator::_M_read_utf16): Add
	parentheses.

2024-11-12  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/117520
	* include/std/text_encoding (aliases_view:_Iterator::operator+=):
	Fix typos that caused == to be used instead of =.
	(aliases_view::_Iterator): Fix friend declaration.
	* testsuite/std/text_encoding/members.cc: Adjust expected
	behaviour of invalid subscript. Add tests for other erroneous
	operations on iterators.

2024-11-11  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-11-08  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/hashtable_policy.h (_Insert_base::try_emplace):
	Do not define for C++11 and C++14.
	* include/debug/map.h (try_emplace): Use feature test macro.
	* include/debug/unordered_map (try_emplace): Likewise.
	* testsuite/17_intro/names.cc: Define try_emplace before C++17.

2024-11-04  Jakub Jelinek  <jakub@redhat.com>

	Backported from master:
	2024-11-04  Jakub Jelinek  <jakub@redhat.com>

	PR libstdc++/117406
	* testsuite/26_numerics/headers/cmath/117406.cc: Use
	std::numeric_limits<int>::max() instead of INT_MAX.

2024-11-04  Jakub Jelinek  <jakub@redhat.com>

	Backported from master:
	2024-11-02  Jakub Jelinek  <jakub@redhat.com>

	PR libstdc++/117406
	* include/c_global/cmath (std::ilogb(_Float16), std::llrint(_Float16),
	std::llround(_Float16), std::lrint(_Float16), std::lround(_Float16)):
	Don't cast __builtin_* return to _Float16.
	(std::ilogb(__gnu_cxx::__bfloat16_t),
	std::llrint(__gnu_cxx::__bfloat16_t),
	std::llround(__gnu_cxx::__bfloat16_t),
	std::lrint(__gnu_cxx::__bfloat16_t),
	std::lround(__gnu_cxx::__bfloat16_t)): Don't cast __builtin_* return to
	__gnu_cxx::__bfloat16_t.
	* testsuite/26_numerics/headers/cmath/117406.cc: New test.

2024-11-04  Jakub Jelinek  <jakub@redhat.com>

	Backported from master:
	2024-10-29  Jakub Jelinek  <jakub@redhat.com>

	PR libstdc++/117321
	* include/c_global/cmath (nextafter(_Float16, _Float16)): Use
	if consteval rather than if (std::__is_constant_evaluated()) around
	the __builtin_nextafterf16 call.
	(nextafter(__gnu_cxx::__bfloat16_t, __gnu_cxx::__bfloat16_t)): Use
	if consteval rather than if (std::__is_constant_evaluated()) around
	the __builtin_nextafterf16b call.
	* testsuite/26_numerics/headers/cmath/117321.cc: New test.

2024-10-22  Patrick Palka  <ppalka@redhat.com>

	Backported from master:
	2024-10-05  Patrick Palka  <ppalka@redhat.com>

	* include/bits/ranges_base.h (__distance_fn::operator()):
	Adjust iterator/sentinel overloads as per LWG 3664.
	* testsuite/24_iterators/range_operations/distance.cc:
	Test LWG 3664 example.

2024-10-22  Patrick Palka  <ppalka@redhat.com>

	Backported from master:
	2024-10-04  Patrick Palka  <ppalka@redhat.com>

	* include/std/ranges (single_view::empty): Define as per LWG 4035.
	(iota_view::empty): Define as per LWG 4001.
	(lazy_split_view::_OuterIter::value_type): Remove default
	constructor and make other constructor private as per LWG 4013.
	(common_view::begin): Disable non-const overload for simple
	views as per LWG 4012.
	(common_view::end): Likewise.
	(adjacent_view::base): Define as per LWG 3848.
	(adjacent_transform_view::base): Likewise.
	(chunk_view::_InnerIter::iter_move): Define as per LWG 3851.
	(chunk_view::_InnerIter::itep_swap): Likewise.
	(slide_view::base): Define as per LWG 3848.
	(repeat_view): Adjust deduction guide as per LWG 4053.
	(_Repeat::operator()): Adjust single-parameter overload as per
	LWG 4054.
	* testsuite/std/ranges/adaptors/adjacent/1.cc: Verify existence
	of base member function.
	* testsuite/std/ranges/adaptors/adjacent_transform/1.cc: Likewise.
	* testsuite/std/ranges/adaptors/chunk/1.cc: Test LWG 3851 example.
	* testsuite/std/ranges/adaptors/slide/1.cc: Verify existence of
	base member function.
	* testsuite/std/ranges/iota/iota_view.cc: Test LWG 4001 example.
	* testsuite/std/ranges/repeat/1.cc: Test LWG 4053/4054 examples.

2024-10-22  Patrick Palka  <ppalka@redhat.com>

	Backported from master:
	2024-08-22  Patrick Palka  <ppalka@redhat.com>

	* testsuite/25_algorithms/contains/1.cc: Verify value of
	__cpp_lib_ranges_contains.
	* testsuite/25_algorithms/find_last/1.cc: Verify value of
	__cpp_lib_ranges_find_last.
	* testsuite/25_algorithms/iota/1.cc: Verify value of
	__cpp_lib_ranges_iota.

2024-10-22  Patrick Palka  <ppalka@redhat.com>

	Backported from master:
	2024-08-22  Patrick Palka  <ppalka@redhat.com>

	* include/bits/iterator_concepts.h (indirectly_unary_invocable):
	Relax as per P2997R1.
	(indirectly_regular_unary_invocable): Likewise.
	(indirect_unary_predicate): Likewise.
	(indirect_binary_predicate): Likewise.
	(indirect_equivalence_relation): Likewise.
	(indirect_strict_weak_order): Likewise.
	* include/bits/version.def (ranges): Update value for C++26.
	* include/bits/version.h: Regenerate.
	* testsuite/24_iterators/indirect_callable/p2997r1.cc: New test.
	* testsuite/std/ranges/version_c++23.cc: Remove.
	* testsuite/std/ranges/headers/ranges/synopsis.cc: Refine the
	__cpp_lib_ranges checks.

2024-10-22  Patrick Palka  <ppalka@redhat.com>

	Backported from master:
	2024-08-22  Patrick Palka  <ppalka@redhat.com>

	* include/bits/iterator_concepts.h (__detail::__indirect_value):
	Define.
	(__indirect_value_t): Define as per P2609R3.
	(iter_common_reference_t): Adjust as per P2609R3.
	(indirectly_unary_invocable): Likewise.
	(indirectly_regular_unary_invocable): Likewise.
	(indirect_unary_predicate): Likewise.
	(indirect_binary_predicate): Likewise.
	(indirect_equivalence_relation): Likewise.
	(indirect_strict_weak_order): Likewise.
	(__detail::__projected::__type): Define member aliases
	__projected_Iter and __projected_Proj providing the
	template arguments of the current specialization.
	* include/bits/version.def (ranges): Update value.
	* include/bits/version.h: Regenerate.
	* testsuite/24_iterators/indirect_callable/p2609r3.cc: New test.
	* testsuite/std/ranges/version_c++23.cc: Update expected value
	of __cpp_lib_ranges macro.

2024-10-16  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-10-16  Jonathan Wakely  <jwakely@redhat.com>

	* python/libstdcxx/v6/printers.py (strip_fundts_namespace): New.
	(StdExpAnyPrinter, StdExpOptionalPrinter): Use it.

2024-10-16  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-06-26  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/90276
	* testsuite/25_algorithms/pstl/alg_modifying_operations/rotate_copy.cc:
	Increase timeout for debug mode.
	* testsuite/25_algorithms/pstl/alg_modifying_operations/transform_binary.cc:
	Likewise.
	* testsuite/25_algorithms/pstl/alg_nonmodifying/mismatch.cc:
	Likewise.
	* testsuite/25_algorithms/pstl/alg_sorting/lexicographical_compare.cc:
	Likewise.
	* testsuite/25_algorithms/pstl/alg_sorting/minmax_element.cc:
	Likewise.
	* testsuite/25_algorithms/pstl/alg_sorting/set_symmetric_difference.cc:
	Likewise.

2024-10-15  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-10-14  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/ranges (transform_view:_Iterator): Use const F&
	to determine value_type and iterator_category of
	_Iterator<true>, as per LWG 3564.
	* testsuite/std/ranges/adaptors/transform.cc: Check value_type
	and iterator_category.

2024-10-15  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-10-11  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/117085
	* include/bits/chrono_io.h (__formatter_chrono::_M_c): Add L
	option to format string.
	* testsuite/std/time/format.cc: Move to...
	* testsuite/std/time/format/format.cc: ...here.
	* testsuite/std/time/format/pr117085.cc: New test.

2024-10-15  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-10-09  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/chrono_io.h (__formatter_chrono::_M_c): Add
	[[unlikely]] attribute to condition for missing %c format in
	locale. Use %T instead of %H:%M:%S in fallback.

2024-10-15  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-10-14  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/117135
	* config/locale/generic/time_members.cc
	(__timepunct<wchar_t>::_M_initialize_timepunc): Set
	_M_date_time_format for C locale. Set %Ex formats to the same
	values as the %x formats.

2024-10-15  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-10-14  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/117094
	* include/bits/ranges_algobase.h (__fill_fn): Use std::move for
	iterator that might not be copyable.
	* testsuite/25_algorithms/fill/constrained.cc: Check
	non-copyable iterator with sized sentinel.

2024-10-03  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-08-23  Jonathan Wakely  <jwakely@redhat.com>

	PR c++/116369
	* include/debug/safe_base.h (_Safe_sequence_base::_M_iterators):
	Add mutable specifier.
	(_Safe_sequence_base::_M_const_iterators): Likewise.

2024-10-03  Kim Gräsman  <kim.grasman@gmail.com>

	Backported from master:
	2024-08-28  Kim Gräsman  <kim.grasman@gmail.com>

	* include/bits/cpp_type_traits.h: Improve doxygen file docs.

2024-10-03  Kim Gräsman  <kim.grasman@gmail.com>

	Backported from master:
	2024-08-28  Kim Gräsman  <kim.grasman@gmail.com>

	* config/cpu/aarch64/opt/ext/opt_random.h: Improve doxygen file
	docs.
	* config/cpu/i486/opt/ext/opt_random.h: Likewise.

2024-10-03  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-08-28  Jonathan Wakely  <jwakely@redhat.com>

	* configure.ac: Fix check for O_NONBLOCK.
	* config.h.in: Regenerate.
	* configure: Regenerate.

2024-10-03  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-09-26  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/116857
	* libsupc++/guard.cc (__cxa_guard_acquire): Remove
	_GLIBCXX_NOTHROW to match declaration in <cxxabi.h>.

2024-10-03  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-06-27  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/37475
	* config/locale/gnu/codecvt_members.cc (Guard): New RAII type.
	(do_out, do_in): Return partial if the destination is empty but
	the source is not. Use Guard to restore locale on scope exit.
	Return immediately on any conversion error.
	(do_encoding, do_max_length, do_length): Use Guard.
	* testsuite/22_locale/codecvt/in/char/37475.cc: New test.
	* testsuite/22_locale/codecvt/in/wchar_t/37475.cc: New test.
	* testsuite/22_locale/codecvt/out/char/37475.cc: New test.
	* testsuite/22_locale/codecvt/out/wchar_t/37475.cc: New test.

2024-10-03  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-10-02  Jonathan Wakely  <jwakely@redhat.com>

	* config/locale/dragonfly/time_members.cc
	(__timepunct<char>::_M_initialize_timepunc)
	(__timepunct<wchar_t>::_M_initialize_timepunc): Set
	_M_date_time_format for C locale. Set %Ex formats to the same
	values as the %x formats.
	* config/locale/generic/time_members.cc: Likewise.
	* config/locale/gnu/time_members.cc: Likewise.
	* testsuite/22_locale/time_get/get/char/5.cc: New test.
	* testsuite/22_locale/time_get/get/wchar_t/5.cc: New test.

2024-10-03  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-09-26  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/cow_string.h (__resize_for_overwrite): Add
	inline keyword to function with always_inline attribute.

2024-10-03  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-06-26  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/90276
	* testsuite/25_algorithms/pstl/alg_sorting/partial_sort.cc
	[_GLIBCXX_DEBUG]: Add xfail-run-if for debug mode.
	* testsuite/25_algorithms/pstl/alg_nonmodifying/nth_element.cc
	[_GLIBCXX_DEBUG]: Reduce size of test data.
	* testsuite/25_algorithms/pstl/alg_sorting/includes.cc:
	Likewise.
	* testsuite/25_algorithms/pstl/alg_sorting/set_util.h:
	Likewise.

2024-10-03  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-09-22  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/format (__format::__is_formattable_integer): New
	variable template and specializations.
	(template<integral, __char> struct formatter): Replace
	constraints on first arg with __is_formattable_integer.
	* testsuite/std/format/formatter/requirements.cc: Check that
	std::formatter specializations for char8_t and const int are
	disabled.

2024-10-03  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-09-22  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/116755
	* include/bits/chrono_io.h (formatter<duration<R,P>>::format):
	Cast negative integral durations to unsigned rep.
	* testsuite/20_util/duration/io.cc: Test the most negative
	integer durations.

2024-09-23  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-09-20  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/116529
	* include/bits/unique_ptr.h (unique_ptr(auto_ptr<U>&&)):
	Use pointer instead of T*.
	* testsuite/20_util/unique_ptr/creation/116529.cc: New test.

2024-09-23  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-09-22  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/116754
	* include/bits/ranges_algobase.h (__copy_or_move): Fix order of
	arguments to __memcpyable.

2024-09-23  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-09-20  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/116777
	* doc/xml/manual/using.xml: Document features that are not
	supported for the gcc4-compatible ABI.
	* doc/html/manual/using_dual_abi.html: Regenerate.

2024-09-23  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-08-23  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/108619
	* include/bits/alloc_traits.h (__allocator_traits_base): Add
	variable templates for detecting whether the allocator has a
	construct member, or if placement new can be used instead.
	(allocator_traits::__construct_helper): Remove.
	(allocator_traits::__has_construct): Remove.
	(allocator_traits::construct): Use 'if constexpr' instead of
	dispatching to overloads constrained with enable_if.
	(allocator_traits<allocator<T>>::construct): Use _Construct if
	construct_at is not supported. Use
	__is_nothrow_new_constructible for noexcept-specifier.
	(allocator_traits<allocator<void>>::construct): Use
	__is_nothrow_new_constructible for noexcept-specifier.
	* include/bits/new_allocator.h (construct): Likewise.
	* include/ext/malloc_allocator.h (construct): Likewise.
	* include/std/type_traits (__is_nothrow_new_constructible): New
	variable template.
	* testsuite/20_util/allocator/89510.cc: Adjust expected results.
	* testsuite/ext/malloc_allocator/89510.cc: Likewise.
	* testsuite/ext/new_allocator/89510.cc: Likewise.
	* testsuite/20_util/allocator_traits/members/108619.cc: New test.

2024-09-11  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-09-10  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/116159
	* include/std/iostream (ios_base_library_init): Only define for
	ELF targets.
	* src/c++98/ios_init.cc (ios_base_library_init): Likewise.

2024-09-11  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-09-10  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/116641
	* include/bits/basic_string.h (operator=(basic_string&&)): Call
	_M_assign instead of assign.
	* testsuite/21_strings/basic_string/allocator/116641.cc: New
	test.

2024-09-10  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-06-26  Jonathan Wakely  <jwakely@redhat.com>

	* src/c++20/tzdb.cc (minmax_year, minmax_year2): Remove.
	(years_from_to): New class replacing minmax_year and
	minmax_year2.
	(format_abbrev_str, select_std_or_dst_abbrev): Move earlier in
	the file. Handle "-" for letters.
	(ZoneInfo::to): Use format_abbrev_str to expand %z.
	(ZoneInfo::set_abbrev): Remove exception. Change parameter from
	reference to value.
	(operator>>(istream&, Rule&)): Do not clear letters when it
	contains "-".
	(time_zone::_M_get_sys_info): Add missing logic to find the Rule
	in effect before the time point.
	* testsuite/std/time/tzdb/1.cc: Adjust for vanguard format using
	"GMT" as the Zone name, not as a Link to "Etc/GMT".
	* testsuite/std/time/time_zone/sys_info_abbrev.cc: New test.

2024-09-08  Patrick Palka  <ppalka@redhat.com>

	Backported from master:
	2024-08-03  Patrick Palka  <ppalka@redhat.com>

	* include/bits/move.h (__like_impl): New metafunction.
	(__like_t): Redefine in terms of __like_impl.
	(forward_like): Redefine in terms of __like_t.
	* testsuite/20_util/forward_like/2_neg.cc: Don't expect
	error outside the immediate context anymore.

2024-09-04  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-09-03  Jonathan Wakely  <jwakely@redhat.com>

	* src/c++17/fs_ops.cc (auto_win_file_handle): Add error_code&
	member and set it if CreateFileW or GetFileInformationByHandle
	fails.
	(fs::equiv_files) [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Simplify
	control flow.
	(fs::hard_link_count) [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Clear ec
	on success.
	* testsuite/27_io/filesystem/operations/hard_link_count.cc:
	Check error handling.

2024-09-04  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-07-30  Jonathan Wakely  <jwakely@redhat.com>

	* src/c++17/fs_ops.cc (auto_win_file_handle): Change constructor
	parameter from const path& to const wchar_t*.
	(fs::equiv_files): New function.
	(fs::equivalent): Use equiv_files.
	* src/filesystem/ops-common.h (fs::equiv_files): Declare.
	(do_copy_file): Use equiv_files.
	* src/filesystem/ops.cc (fs::equiv_files): Define.
	(fs::copy, fs::equivalent): Use equiv_files.
	* testsuite/27_io/filesystem/operations/copy.cc: Test
	overwriting directory contents recursively.
	* testsuite/27_io/filesystem/operations/copy_file.cc: Test
	overwriting existing files.

2024-09-04  Lennox Shou Hao Ho  <lennoxhoe@gmail.com>

	Backported from master:
	2024-07-30  Lennox Shou Hao Ho  <lennoxhoe@gmail.com>

	PR libstdc++/113663
	* src/c++17/fs_ops.cc (fs::equivalent): Moved helper class
	auto_handle to anonymous namespace as auto_win_file_handle.
	(fs::hard_link_count): Changed Windows implementation to use
	information provided by GetFileInformationByHandle which is more
	reliable.
	* testsuite/27_io/filesystem/operations/hard_link_count.cc: New
	test.

2024-09-04  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-09-03  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/116549
	* include/bits/stl_iterator.h (disable_sized_sentinel_for):
	Define specialization for two move_iterator types, as per LWG
	3736.
	* testsuite/24_iterators/move_iterator/lwg3736.cc: New test.

2024-09-04  Dhruv Chawla  <dhruvc@nvidia.com>

	Backported from master:
	2024-09-03  Dhruv Chawla  <dhruvc@nvidia.com>

	* include/std/deque: Define macro
	__glibcxx_want_allocator_traits_is_always_equal.
	* include/std/forward_list: Likewise.
	* include/std/list: Likewise.
	* include/std/map: Likewise.
	* include/std/scoped_allocator: Likewise.
	* include/std/set: Likewise.
	* include/std/string: Likewise.
	* include/std/unordered_map: Likewise.
	* include/std/unordered_set: Likewise.
	* include/std/vector: Likewise.
	* testsuite/20_util/headers/memory/version.cc: New test.
	* testsuite/20_util/scoped_allocator/version.cc: Likewise.
	* testsuite/21_strings/headers/string/version.cc: Likewise.
	* testsuite/23_containers/deque/version.cc: Likewise.
	* testsuite/23_containers/forward_list/version.cc: Likewise.
	* testsuite/23_containers/list/version.cc: Likewise.
	* testsuite/23_containers/map/version.cc: Likewise.
	* testsuite/23_containers/set/version.cc: Likewise.
	* testsuite/23_containers/unordered_map/version.cc: Likewise.
	* testsuite/23_containers/unordered_set/version.cc: Likewise.
	* testsuite/23_containers/vector/version.cc: Likewise.

2024-09-04  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-08-21  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/116381
	* include/std/variant (variant): Fix conditions for
	static_assert to match the spec.
	* testsuite/20_util/variant/types_neg.cc: New test.

2024-08-03  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-06-21  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/version.def (chrono): Add cxx11abi = yes.
	* include/bits/version.h: Regenerate.
	* testsuite/std/time/syn_c++20.cc: Adjust expected value for
	the feature test macro.

2024-08-02  Patrick Palka  <ppalka@redhat.com>

	Backported from master:
	2024-07-25  Patrick Palka  <ppalka@redhat.com>

	PR libstdc++/116038
	* include/std/functional (_Bind_front::operator()): Use __like_t
	instead of std::forward when forwarding __self.
	(_Bind_back::operator()): Likewise.
	* include/std/ranges (_Partial::operator()): Likewise.
	(_Pipe::operator()): Likewise.
	* testsuite/20_util/function_objects/bind_back/116038.cc: New test.
	* testsuite/20_util/function_objects/bind_front/116038.cc: New test.
	* testsuite/std/ranges/adaptors/116038.cc: New test.

2024-08-01  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-05-22  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/locale_classes.h (locale::combine)
	(locale::name, locale::operator==, locale::operator!=)
	(locale::operator(), locale::classic): Add nodiscard
	attribute.
	* include/bits/locale_classes.tcc (has_facet, use_facet):
	Likewise.
	* testsuite/22_locale/locale/cons/12438.cc: Add dg-warning for
	nodiscard diagnostic.
	* testsuite/22_locale/locale/cons/2.cc: Cast use_facet
	expression to void, to suppress diagnostic.
	* testsuite/22_locale/locale/cons/unicode.cc: Likewise.
	* testsuite/22_locale/locale/operations/2.cc: Add dg-warning.

2024-08-01  Deev Patel  <dkp10000@gmail.com>

	Backported from master:
	2024-06-08  Deev Patel  <dkp10000@gmail.com>
		    Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/atomic_base.h (__atomic_impl::__clear_padding):
	Add missing constexpr specifier.
	* testsuite/29_atomics/atomic_float/constinit.cc: New test.

2024-08-01  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-06-21  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/util/testsuite_allocator.h (tracker_allocator):
	Initialize base class in copy constructor.

2024-08-01  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-06-12  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/115399
	* include/tr2/dynamic_bitset (operator>>=): Remove redundant
	call to _M_do_sanitize.
	* include/tr2/dynamic_bitset.tcc (_M_do_left_shift): Zero out
	low bits in words that should no longer be populated.
	(_M_do_right_shift): Likewise for high bits.
	* testsuite/tr2/dynamic_bitset/pr115399.cc: New test.

2024-08-01  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-07-25  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/format (basic_format_args): Remove default
	constructor, as per LWG 4106.
	* testsuite/std/format/arguments/args.cc: Check it isn't default
	constructible.

2024-08-01  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-07-10  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/114387
	* include/std/format (basic_format_context): Define copy
	operations as deleted, as per LWG 4061.
	* testsuite/std/format/context.cc: New test.

2024-08-01  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-06-21  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/any (any_cast(any*), any_cast(const any*)): Add
	static assertion to reject void types, as per LWG 3305.
	* testsuite/20_util/any/misc/lwg3305.cc: New test.

2024-08-01  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-06-08  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/algorithm: Define __glibcxx_want_ranges.
	* testsuite/25_algorithms/headers/algorithm/synopsis.cc: Check
	feature test macro in C++20 mode.

2024-08-01  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-07-10  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/115854
	* include/bits/stl_bvector.h (_Bvector_base): Convert allocator
	to rebound type explicitly.
	* testsuite/23_containers/vector/allocator/115854.cc: New test.
	* testsuite/23_containers/vector/bool/allocator/115854.cc: New test.

2024-08-01  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-06-13  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/ranges_base.h (const_iterator_t): Change
	preprocessor condition to use __glibcxx_ranges_as_const.
	(const_sentinel_t, range_const_reference_t): Likewise.
	(__access::__possibly_const_range, cbegin, cend, crbegin)
	(crend, cdata): Likewise.
	* include/bits/stl_iterator.h (iter_const_reference_t)
	(basic_const_iterator, const_iterator, const_sentinel)
	(make_const_iterator): Likewise.

2024-08-01  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-07-06  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/variant (_Variant_storage::_M_reset): Use
	__unlikely__ form of attribute instead of unlikely.

2024-08-01  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-07-24  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/116070
	* include/std/istream: Check feature test macro before using
	is_class_v and is_same_v.
	* include/std/ostream: Likewise.

2024-08-01  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-07-24  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/116070
	* include/bits/stl_bvector.h: Check feature test macro before
	using is_default_constructible_v.

2024-08-01  Release Manager

	* GCC 14.2.0 released.

2024-07-23  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-07-23  Jonathan Wakely  <jwakely@redhat.com>

	* src/c++23/print.cc (__open_terminal): Use [[maybe_unused]] on
	parameter.

2024-07-23  Detlef Vollmann  <dv@vollmann.ch>

	Backported from master:
	2024-07-23  Detlef Vollmann  <dv@vollmann.ch>

	PR libstdc++/115482
	* src/c++23/print.cc (__open_terminal) [__AVR__]: Do not use
	isatty.

2024-07-12  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-06-13  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/113376
	* include/pstl/pstl_config.h: Use #if instead of #ifdef to test
	the _PSTL_USAGE_WARNINGS macro.

2024-07-12  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-06-21  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/115522
	* include/std/array (to_array): Workaround the fact that
	std::is_trivial is not sufficient to check that a type is
	trivially default constructible and assignable.
	* testsuite/23_containers/array/creation/115522.cc: New test.

2024-07-09  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-07-08  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/115807
	* include/c_compatibility/stdatomic.h (_Atomic): Ensure it
	refers to std::atomic in the global namespace.
	* testsuite/29_atomics/headers/stdatomic.h/115807.cc: New test.

2024-07-09  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-06-28  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/115585
	* src/c++11/assert_fail.cc (__glibcxx_assert_fail): Add
	definition for non-verbose builds.

2024-06-28  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-06-27  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/115668
	* include/bits/chrono_io.h (formatter<duration<R,P, C>::format):
	Do not use chrono::abs.
	* testsuite/20_util/duration/io.cc: Check formatting a duration
	with unsigned rep.

2024-06-27  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-06-25  Jonathan Wakely  <jwakely@redhat.com>

	* doc/xml/faq.xml: Replace viewcvs links with cgit links.
	* doc/xml/manual/allocator.xml: Likewise.
	* doc/xml/manual/mt_allocator.xml: Likewise.
	* doc/html/*: Regenerate.

2024-06-27  Alexandre Oliva  <oliva@adacore.com>

	Backported from master:
	2024-06-27  Alexandre Oliva  <oliva@adacore.com>

	PR libstdc++/115454
	* testsuite/experimental/simd/pr115454_find_last_set.cc: Defer
	to check_vect_support_and_set_flags's default dg-do action.

2024-06-25  Jonathan Wakely  <jwakely@redhat.com>

	* doc/xml/manual/status_cxx1998.xml: Remove confusing "not in
	any particular release" text.
	* doc/xml/manual/status_cxx2011.xml: Likewise.
	* doc/xml/manual/status_cxx2014.xml: Likewise.
	* doc/xml/manual/status_cxx2017.xml: Likewise.
	* doc/xml/manual/status_cxx2020.xml: Likewise.
	* doc/xml/manual/status_cxx2023.xml: Likewise.
	* doc/xml/manual/status_cxxtr1.xml: Likewise.
	* doc/xml/manual/status_cxxtr24733.xml: Likewise.
	* doc/html/manual/status.html: Regenerate.

2024-06-21  Matthias Kretz  <m.kretz@gsi.de>

	Backported from master:
	2024-06-21  Matthias Kretz  <m.kretz@gsi.de>

	PR libstdc++/115575
	* testsuite/experimental/simd/pr115454_find_last_set.cc: Require
	avx512f_runtime. Don't memcpy fixed_size masks.

2024-06-20  Matthias Kretz  <m.kretz@gsi.de>

	Backported from master:
	2024-06-20  Matthias Kretz  <m.kretz@gsi.de>

	PR libstdc++/115454
	* include/experimental/bits/simd_x86.h (_S_not_equal_to): Use
	neq comparison instead of bitwise negation after eq.
	(_S_find_last_set): Clear unused high bits before computing
	bit_width.
	* testsuite/experimental/simd/pr115454_find_last_set.cc: New
	test.

2024-06-14  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-06-14  Jonathan Wakely  <jwakely@redhat.com>

	* libsupc++/new_opa.cc [!_GLIBCXX_HOSTED]: Fix declaration of
	posix_memalign.

2024-06-10  Matthias Kretz  <m.kretz@gsi.de>

	Backported from master:
	2024-06-04  Matthias Kretz  <m.kretz@gsi.de>

	PR libstdc++/115308
	* include/experimental/bits/simd.h (__int_for_sizeof): Remove
	special cases for __clang__.
	(_SimdWrapper): Change constructor overload set to allow
	conversion from vector types with integral conversions via bit
	reinterpretation.

2024-06-10  Matthias Kretz  <m.kretz@gsi.de>

	Backported from master:
	2024-05-29  Matthias Kretz  <m.kretz@gsi.de>

	PR libstdc++/115247
	* include/experimental/bits/simd.h (__as_vector): Don't use
	vector_size(8) on __i386__.
	(__vec_shuffle): Never return MMX vectors, widen to 16 bytes
	instead.
	(concat): Fix padding calculation to pick up widening logic from
	__as_vector.

2024-06-10  Matthias Kretz  <m.kretz@gsi.de>

	Backported from master:
	2024-05-13  Matthias Kretz  <m.kretz@gsi.de>

	PR libstdc++/114958
	* include/experimental/bits/simd.h (__as_vector): Return scalar
	simd as one-element vector. Return vector from single-vector
	fixed_size simd.
	(__vec_shuffle): New.
	(__extract_part): Adjust return type signature.
	(split): Use __extract_part for any split into non-fixed_size
	simds.
	(concat): If the return type stores a single vector, use
	__vec_shuffle (which calls __builtin_shufflevector) to produce
	the return value.
	* include/experimental/bits/simd_builtin.h
	(__shift_elements_right): Removed.
	(__extract_part): Return single elements directly. Use
	__vec_shuffle (which calls __builtin_shufflevector) to for all
	non-trivial cases.
	* include/experimental/bits/simd_fixed_size.h (__extract_part):
	Return single elements directly.
	* testsuite/experimental/simd/pr114958.cc: New test.

2024-06-04  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-06-04  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/115335
	* include/std/span (span::at): Guard with feature test macro.

2024-06-04  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>

	Backported from master:
	2024-05-29  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>

	PR libstdc++/111641
	* src/libbacktrace/Makefile.am (AM_CFLAGS): Add -funwind-tables.
	* src/libbacktrace/Makefile.in: Regenerate.
	* testsuite/19_diagnostics/stacktrace/current.cc (dg-options): Add
	-funwind-tables.
	* testsuite/19_diagnostics/stacktrace/entry.cc: Likewise.
	* testsuite/19_diagnostics/stacktrace/hash.cc: Likewise.
	* testsuite/19_diagnostics/stacktrace/output.cc: Likewise.
	* testsuite/19_diagnostics/stacktrace/stacktrace.cc: Likewise.

2024-06-03  François Dumont  <frs.dumont@gmail.com>

	Backported from master:
	2024-06-03  François Dumont  <frs.dumont@gmail.com>

	PR libstdc++/109849
	* include/bits/vector.tcc
	(std::vector<>::_M_range_insert(iterator, _FwdIt, _FwdIt,
	forward_iterator_tag))[__cplusplus < 201103L]: Add __builtin_unreachable
	expression to tell the compiler that the allocated buffer is large enough to
	receive current elements plus the elements of the range to insert.

2024-06-01  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-06-01  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/115269
	* doc/xml/manual/using.xml: Replace link to gcc-4.3.2 docs.
	Replace list of -std=... options with a single entry for -std.
	* doc/html/manual/using.html: Regenerate.

2024-05-28  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-05-22  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/114940
	* include/bits/version.def (generator): Depend on
	__cpp_sized_deallocation.
	* include/bits/version.h: Regenerate.
	* include/std/stacktrace (_GLIBCXX_SIZED_DELETE): New macro.
	(basic_stacktrace::_Impl::_M_deallocate): Use it.

2024-05-22  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-05-22  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/115099
	* include/bits/std_thread.h: Declare formatter as friend of
	thread::id.
	* include/std/thread (operator<<): Convert non-void pointers to
	void pointers for output.
	(formatter): Add constraint that thread::native_handle_type is a
	pointer or integer.
	(formatter::format): Reimplement without basic_ostringstream.
	* testsuite/30_threads/thread/id/output.cc: Check output
	compiles before <sstream> has been included.

2024-05-17  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-05-17  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/115119
	* include/bits/unicode.h (_Iterator::operator++(int)): Fix typo
	in increment expression.
	* testsuite/ext/unicode/grapheme_view.cc: Check post-increment
	on view's iterator.

2024-05-14  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/115015
	* src/c++23/print.cc (__open_terminal(streambuf*)) [!__cpp_rtti]:
	Do not use dynamic_cast.

2024-05-14  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-05-14  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/115063
	* include/std/stacktrace (basic_stacktrace::max_size): Fix typo
	in reference to _M_alloc member.
	* testsuite/19_diagnostics/stacktrace/stacktrace.cc: Check
	max_size() compiles.

2024-05-14  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-05-01  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/114891
	* include/std/generator: Check feature test macro before using
	is_pointer_interconvertible_v.

2024-05-14  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-05-07  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/util/testsuite_abi.cc: Update latest versions to
	new versions that should be used in future.

2024-05-14  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-05-07  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/unicode.h (_Unicode_view::_M_read_utf8): Ensure
	count of characters consumed is correct when the end of the
	input is reached unexpectedly.
	* testsuite/ext/unicode/view.cc: Test incomplete UTF-8
	sequences.

2024-05-14  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-05-07  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/114866
	* include/bits/out_ptr.h [!_GLIBCXX_HOSTED]: Don't refer to
	shared_ptr, __shared_ptr or __is_shred_ptr.
	* testsuite/20_util/headers/memory/114866.cc: New test.

2024-05-07  Release Manager

	* GCC 14.1.0 released.

2024-05-03  Andreas Schwab  <schwab@linux-m68k.org>

	* config/abi/post/powerpc-linux-gnu/baseline_symbols.txt: Update.
	* config/abi/post/powerpc64-linux-gnu/32/baseline_symbols.txt: Update.

2024-04-30  Jonathan Wakely  <jwakely@redhat.com>

	Backported from master:
	2024-04-30  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/114863
	* include/std/format (__formatter_fp::format): Only use
	_M_localized for finite values.
	* testsuite/std/format/functions/format.cc: Check localized
	formatting of NaN and initiny.

2024-04-29  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>

	* config/abi/post/i386-solaris/baseline_symbols.txt: Regenerate.
	* config/abi/post/i386-solaris/amd64/baseline_symbols.txt:
	Likewise.
	* config/abi/post/sparc-solaris/baseline_symbols.txt: Likewise.
	* config/abi/post/sparc-solaris/sparcv9/baseline_symbols.txt:
	Likewise.

2024-04-29  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>

	Backported from master:
	2024-04-29  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>

	* config/abi/post/i386-solaris/baseline_symbols.txt: Regenerate.
	* config/abi/post/i386-solaris/amd64/baseline_symbols.txt:
	Likewise.
	* config/abi/post/sparc-solaris/baseline_symbols.txt: Likewise.
	* config/abi/post/sparc-solaris/sparcv9/baseline_symbols.txt:
	Likewise.

2024-04-26  Jonathan Wakely  <jwakely@redhat.com>

	* doc/html/manual/status.html: Regenerate.
	* doc/xml/manual/status_cxx1998.xml: Replace references to
	mainline GCC.
	* doc/xml/manual/status_cxx2011.xml: Likewise.
	* doc/xml/manual/status_cxx2014.xml: Likewise.
	* doc/xml/manual/status_cxx2017.xml: Likewise.
	* doc/xml/manual/status_cxx2020.xml: Likewise.
	* doc/xml/manual/status_cxx2023.xml: Likewise.
	* doc/xml/manual/status_cxxtr1.xml: Likewise.
	* doc/xml/manual/status_cxxtr24733.xml: Likewise.

2024-04-25  Jonathan Wakely  <jwakely@redhat.com>

	* scripts/run_doxygen: Rename man pages for nested types.

2024-04-25  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/chrono (tzdb_list): Fix typo in Doxygen comment.

2024-04-25  Jonathan Wakely  <jwakely@redhat.com>

	* scripts/run_doxygen: Adjust sed pattern to match '\fR' for
	new man output that Doxygen 1.10 generates.

2024-04-25  Jonathan Wakely  <jwakely@redhat.com>

	* doc/doxygen/stdheader.cc (init_map): Add missing headers.
	* doc/doxygen/user.cfg.in (EXCLUDE): Exclude generated files for
	std::format and std::text_encoding.

2024-04-25  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/variant: Add comment to #include.

2024-04-22  Matthias Kretz  <m.kretz@gsi.de>

	PR libstdc++/114803
	* include/experimental/bits/simd_builtin.h
	(_SimdBase2::operator __vector_type_t): There is no __builtin()
	function in _SimdWrapper, instead use its conversion operator.
	* testsuite/experimental/simd/pr114803_vecbuiltin_cvt.cc: New
	test.

2024-04-22  Matthias Kretz  <m.kretz@gsi.de>

	* include/experimental/bits/simd.h: Ignore -Wnarrowing for
	arm_neon.h.
	(__int_for_sizeof): Replace tautological compare with checking
	for invalid template parameter value.
	* include/experimental/bits/simd_builtin.h (__extract_part):
	Remove tautological compare by combining two static_assert.

2024-04-22  Jakub Jelinek  <jakub@redhat.com>

	* testsuite/17_intro/names.cc (d, f): Undefine on s390*-linux*.
	* testsuite/17_intro/headers/c++1998/all_attributes.cc (packed): Don't
	define on s390.
	* testsuite/17_intro/headers/c++2011/all_attributes.cc (packed):
	Likewise.
	* testsuite/17_intro/headers/c++2014/all_attributes.cc (packed):
	Likewise.
	* testsuite/17_intro/headers/c++2017/all_attributes.cc (packed):
	Likewise.
	* testsuite/17_intro/headers/c++2020/all_attributes.cc (packed):
	Likewise.

2024-04-19  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/refwrap.h (operator<=>): Simplify constraints.

2024-04-19  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/114770
	* src/c++20/tzdb.cc (do_locate_zone): Support links that have
	another link as their target.
	* testsuite/std/time/tzdb/1.cc: Check that all zones and links
	can be found by locate_zone.
	* testsuite/std/time/tzdb/links.cc: New test.

2024-04-18  Alexandre Oliva  <oliva@adacore.com>

	* testsuite/29_atomics/atomic/compare_exchange_padding.cc:
	Disable SRA.

2024-04-18  Alexandre Oliva  <oliva@adacore.com>

	* testsuite/20_util/from_chars/8.cc: Skip float128_t testing
	on aarch64-vxworks.
	* testsuite/20_util/to_chars/float128_c++23.cc: Xfail run on
	aarch64-vxworks.

2024-04-18  Alexandre Oliva  <oliva@adacore.com>

	* src/c++20/tzdb.cc (__gnu_cxx::zoneinfo_dir_override): Define
	on VxWorks non-RTP.

2024-04-17  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/ostream (println(ostream&)): Define new overload.
	* include/std/print (println(FILE*), println()): Likewise.
	* testsuite/27_io/basic_ostream/print/2.cc: New test.
	* testsuite/27_io/print/1.cc: Remove unused header.
	* testsuite/27_io/print/3.cc: New test.

2024-04-17  Matthias Kretz  <m.kretz@gsi.de>

	* include/experimental/bits/numeric_traits.h: Add include guard.

2024-04-17  Matthias Kretz  <m.kretz@gsi.de>

	PR libstdc++/114750
	* include/experimental/bits/simd_builtin.h
	(_SimdImplBuiltin::_S_load, _S_store): Fall back to copying
	scalars if the memory type cannot be vectorized for the target.

2024-04-16  Jonathan Wakely  <jwakely@redhat.com>

	* config/locale/dragonfly/numeric_members.cc: Fix typos in
	comments.
	* config/locale/gnu/numeric_members.cc: Likewise.

2024-04-15  Jonathan Wakely  <jwakely@redhat.com>

	* doc/xml/manual/abi.xml: Replace "<next>" with "14.1.0".
	* doc/html/manual/abi.html: Regenerate.

2024-04-15  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/refwrap.h (reference_wrapper): Add comparison
	operators as proposed by P2944R3.
	* include/bits/version.def (reference_wrapper): Define.
	* include/bits/version.h: Regenerate.
	* include/std/functional: Enable feature test macro.
	* testsuite/20_util/reference_wrapper/compare.cc: New test.

2024-04-15  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/113386
	* include/bits/stl_pair.h (operator==, operator<=>): Support
	heterogeneous comparisons, as per LWG 3865.
	* testsuite/20_util/pair/comparison_operators/lwg3865.cc: New
	test.

2024-04-15  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/93672
	* src/c++98/istream.cc (istream::ignore(streamsize, int_type)):
	Treat all negative delimiter values as eof().
	* testsuite/27_io/basic_istream/ignore/char/93672.cc: New test.
	* testsuite/27_io/basic_istream/ignore/wchar_t/93672.cc: New
	test.

2024-04-15  Andreas Schwab  <schwab@suse.de>

	* config/abi/post/riscv64-linux-gnu/baseline_symbols.txt: Update.

2024-04-13  H.J. Lu  <hjl.tools@gmail.com>

	* config/abi/post/x86_64-linux-gnu/x32/baseline_symbols.txt:
	Updated.

2024-04-11  Jakub Jelinek  <jakub@redhat.com>

	* doc/xml/manual/abi.xml: Add latest library versions.
	* doc/html/manual/abi.html: Regenerate.

2024-04-11  Jakub Jelinek  <jakub@redhat.com>

	* config/abi/post/x86_64-linux-gnu/baseline_symbols.txt: Update.
	* config/abi/post/x86_64-linux-gnu/32/baseline_symbols.txt: Update.
	* config/abi/post/i486-linux-gnu/baseline_symbols.txt: Update.
	* config/abi/post/m68k-linux-gnu/baseline_symbols.txt: Update.
	* config/abi/post/aarch64-linux-gnu/baseline_symbols.txt: Update.
	* config/abi/post/s390x-linux-gnu/baseline_symbols.txt: Update.
	* config/abi/post/riscv64-linux-gnu/baseline_symbols.txt: Update.
	* config/abi/post/powerpc64le-linux-gnu/baseline_symbols.txt: Update.
	* config/abi/post/powerpc64-linux-gnu/baseline_symbols.txt: Update.

2024-04-11  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/114692
	* config/abi/pre/gnu.ver (GLIBCXX_3.4.32): Move new exports for
	__basic_file::native_handle to ...
	(GLIBCXX_3.4.33): ... here. Adjust to not match wchar_t
	specialization, which isn't used.
	* testsuite/util/testsuite_abi.cc: Add GLIBCXX_3.4.33 and update
	latest version check.

2024-04-11  Jakub Jelinek  <jakub@redhat.com>

	* config/abi/post/x86_64-linux-gnu/baseline_symbols.txt: Update.
	* config/abi/post/x86_64-linux-gnu/32/baseline_symbols.txt: Update.
	* config/abi/post/i486-linux-gnu/baseline_symbols.txt: Update.
	* config/abi/post/m68k-linux-gnu/baseline_symbols.txt: Update.
	* config/abi/post/aarch64-linux-gnu/baseline_symbols.txt: Update.
	* config/abi/post/s390x-linux-gnu/baseline_symbols.txt: Update.
	* config/abi/post/riscv64-linux-gnu/baseline_symbols.txt: Update.
	* config/abi/post/powerpc64le-linux-gnu/baseline_symbols.txt: Update.
	* config/abi/post/powerpc64-linux-gnu/baseline_symbols.txt: Update.

2024-04-10  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/27_io/manipulators/extended/get_time/char/2.cc:
	Adjust input string so that it matches %a with or without a
	trailing period.
	* testsuite/std/time/year_month_day/io.cc: Adjust expected
	format for %x in the fr_FR locale.

2024-04-10  Jonathan Wakely  <jwakely@redhat.com>

	* src/c++17/fs_ops.cc (remove_all) [__FreeBSD__ || __DragonFly__]:
	Check for EMLINK as well as ELOOP.
	[__NetBSD__]: Check for EFTYPE as well as ELOOP.

2024-04-09  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/114633
	* include/bits/chrono_io.h (_Parser::operator()) <'S'>: Use
	stream extraction if std::from_chars is not available.

2024-04-08  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/114519
	* include/bits/unicode.h (_Utf8_view) [!__cpp_char8_t]: Define
	using char instead of char8_t.
	* testsuite/ext/unicode/view.cc: Use u8""sv literals to create
	string views, instead of std::u8string_view.

2024-04-08  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/20_util/integer_comparisons/equal_neg.cc: Use
	no-opts selector for errors that depend on -fchar8_t.
	* testsuite/20_util/integer_comparisons/greater_equal_neg.cc:
	Likewise.
	* testsuite/20_util/integer_comparisons/greater_neg.cc:
	Likewise.
	* testsuite/20_util/integer_comparisons/in_range_neg.cc:
	Likewise.
	* testsuite/20_util/integer_comparisons/less_equal_neg.cc:
	Likewise.
	* testsuite/20_util/integer_comparisons/less_neg.cc: Likewise.
	* testsuite/20_util/integer_comparisons/not_equal_neg.cc:
	Likewise.
	* testsuite/21_strings/basic_string/hash/hash_char8_t.cc: Skip
	if -fno-char8_t is used.
	* testsuite/21_strings/headers/cuchar/functions_std_cxx20.cc:
	Likewise.
	* testsuite/27_io/basic_ostream/inserters_character/char/deleted.cc:
	Likewise.
	* testsuite/27_io/basic_ostream/inserters_character/wchar_t/deleted.cc:
	Likewise.
	* testsuite/27_io/filesystem/path/factory/u8path-depr.cc: Use
	char for u8 literal if char8_t is not available.
	* testsuite/27_io/headers/iosfwd/synopsis.cc: Check
	__cpp_char8_t.
	* testsuite/29_atomics/atomic_integral/wait_notify.cc: Likewise.
	* testsuite/29_atomics/headers/atomic/types_std_c++20_neg.cc:
	Remove check for _GLIBCXX_USE_CHAR8_T.

2024-04-08  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/20_util/from_chars/1_neg.cc: Add char8_t cases,
	using a struct of that name if -fno-char8_t is active.
	* testsuite/20_util/from_chars/1_c++20_neg.cc: Removed.

2024-04-03  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/104606
	* include/std/optional (operator<=>(const optional<T>&, const U&)):
	Reverse order of three_way_comparable_with template arguments.
	* testsuite/20_util/optional/relops/104606.cc: New test.

2024-04-02  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/114519
	* include/bits/unicode.h (_Utf8_view): Guard with check for
	char8_t being enabled.
	(__literal_encoding_is_unicode): Guard use of char8_t with check
	for it being enabled.
	* testsuite/std/format/functions/114519.cc: New test.

2024-04-02  Patrick Palka  <ppalka@redhat.com>

	* include/std/ranges (ranges::__detail::_Empty): Rename to ...
	(ranges::__detail::_Absent): ... this.  Turn into a template
	parameterized by the absent type _Tp and discriminator _Disc.
	(ranges::__detail::__maybe_present_t): Add an optional
	discriminator parameter.
	(slide_view::_M_cached_begin): Pass a discriminator argument to
	__maybe_present_t.
	(slide_view::_M_cached_end): Likewise.
	* testsuite/std/ranges/adaptors/sizeof.cc: Verify the size of
	slide_view<V> is 3 instead 4 pointers.

2024-04-02  Jakub Jelinek  <jakub@redhat.com>

	* acinclude.m4: Fix duplicated words; file file -> file can.
	* configure.host: Fix duplicated words; the the -> the.

2024-03-29  Arsen Arsenović  <arsen@aarsen.me>

	* testsuite/24_iterators/range_generators/01.cc: Drop GCC
	Runtime Library Exception.
	* testsuite/24_iterators/range_generators/02.cc: Drop GCC
	Runtime Library Exception.
	* testsuite/24_iterators/range_generators/copy.cc: Drop GCC
	Runtime Library Exception.
	* testsuite/24_iterators/range_generators/except.cc: Drop GCC
	Runtime Library Exception.
	* testsuite/24_iterators/range_generators/subrange.cc: Drop GCC
	Runtime Library Exception.
	* testsuite/24_iterators/range_generators/synopsis.cc: Drop GCC
	Runtime Library Exception.
	* testsuite/24_iterators/range_generators/iter_deref_return.cc:
	Drop GCC Runtime Library Exception from the "You should have
	received a copy" paragraph.

2024-03-27  Matthias Kretz  <m.kretz@gsi.de>

	* include/experimental/bits/simd_x86.h (_S_masked_unary):
	Cast inputs < 16 bytes to 16 byte vectors before calling the
	right subtraction builtin. Before returning, truncate to the
	return vector type.

2024-03-27  Matthias Kretz  <m.kretz@gsi.de>

	* include/experimental/bits/simd_x86.h (_S_masked_unary): Call
	the 4- and 8-byte variants of __builtin_ia32_subp[ds] without
	rounding direction argument.

2024-03-27  Srinivas Yadav Singanaboina  <vasu.srinivasvasu.14@gmail.com>

	* include/Makefile.am: Add simd_sve.h.
	* include/Makefile.in: Add simd_sve.h.
	* include/experimental/bits/simd.h: Add new SveAbi.
	* include/experimental/bits/simd_builtin.h: Use
	__no_sve_deduce_t to support existing Neon Abi.
	* include/experimental/bits/simd_converter.h: Convert
	sequentially when sve is available.
	* include/experimental/bits/simd_detail.h: Define sve
	specific macro.
	* include/experimental/bits/simd_math.h: Fallback frexp
	to execute sequntially when sve is available, to handle
	fixed_size_simd return type that always uses sve.
	* include/experimental/simd: Include bits/simd_sve.h.
	* testsuite/experimental/simd/tests/bits/main.h: Enable
	testing for sve128, sve256, sve512.
	* include/experimental/bits/simd_sve.h: New file.

2024-03-26  Arsen Arsenović  <arsen@aarsen.me>

	* include/std/generator (generator::_Iterator::operator*): Fix
	return type.
	* testsuite/24_iterators/range_generators/iter_deref_return.cc:
	New test.

2024-03-26  Arsen Arsenović  <arsen@aarsen.me>

	* include/std/generator: Fix _V badname.

2024-03-26  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/19_diagnostics/stacktrace/current.cc: Check for
	__cpp_lib_stacktrace instead of check for stacktrace ET.
	* testsuite/19_diagnostics/stacktrace/entry.cc: Likewise.
	* testsuite/19_diagnostics/stacktrace/hash.cc: Likewise.
	* testsuite/19_diagnostics/stacktrace/output.cc: Likewise.
	* testsuite/19_diagnostics/stacktrace/stacktrace.cc: Likewise.
	* testsuite/19_diagnostics/stacktrace/synopsis.cc: Likewise.
	* testsuite/19_diagnostics/stacktrace/version.cc: Likewise.
	* testsuite/23_containers/vector/debug/assign4_backtrace_neg.cc:
	Likewise.
	* testsuite/lib/libstdc++.exp (check_effective_target_stacktrace):
	Remove.

2024-03-26  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/lib/dg-options.exp (dg-require-cpp-feature-test):
	New proc.
	* testsuite/lib/libstdc++.exp (check_v3_target_cpp_feature_test):
	New proc.
	* testsuite/std/text_encoding/cons.cc: Use new directive to skip
	the test if the __cpp_lib_text_encoding feature test macro is
	not defined.
	* testsuite/std/text_encoding/requirements.cc: Likewise.

2024-03-25  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/std/text_encoding/requirements.cc: #undef the
	correct macro.

2024-03-23  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/format (formatter): Disable specializations that
	would allow sequences of narrow characters to be formatted as
	wchar_t without conversion, as per LWG 3944.
	* testsuite/std/format/formatter/lwg3944.cc: New test.

2024-03-23  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/utility.h (__is_in_place_index_v): New variable
	template.
	* include/std/variant (__not_in_place_tag): Define in terms of
	variable templates not a class template.

2024-03-23  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/114400
	* include/std/string_view (operator==): Use std::type_identity_t
	in C++20 instead of our own __type_identity_t.

2024-03-22  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/114401
	* include/bits/hashtable.h (_Hashtable::_M_reinsert_node): Call
	release() on node handle instead of just zeroing its pointer.
	(_Hashtable::_M_reinsert_node_multi): Likewise.
	(_Hashtable::_M_merge_unique): Likewise.
	(_Hashtable::_M_merge_multi): Likewise.
	* include/bits/node_handle.h (_Node_handle_common::release()):
	New member function.
	(_Node_handle_common::_Optional_alloc::_M_empty): Remove
	unnecessary union member.
	(_Node_handle_common): Declare _Hashtable as a friend.
	* include/bits/stl_tree.h (_Rb_tree::_M_reinsert_node_unique):
	Call release() on node handle instead of just zeroing its
	pointer.
	(_Rb_tree::_M_reinsert_node_equal): Likewise.
	(_Rb_tree::_M_reinsert_node_hint_unique): Likewise.
	(_Rb_tree::_M_reinsert_node_hint_equal): Likewise.
	* testsuite/23_containers/multiset/modifiers/114401.cc: New test.
	* testsuite/23_containers/set/modifiers/114401.cc: New test.
	* testsuite/23_containers/unordered_multiset/modifiers/114401.cc: New test.
	* testsuite/23_containers/unordered_set/modifiers/114401.cc: New test.

2024-03-22  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/113841
	* include/bits/allocator.h (allocator<cv T>): Add default
	constructor to partial specializations for cv-qualified types.
	* include/bits/stl_vector.h (_Vector_impl::_Vector_impl()):
	Constrain so that it's only present if the allocator is default
	constructible.
	* include/bits/stl_bvector.h (_Bvector_impl::_Bvector_impl()):
	Likewise.
	* testsuite/23_containers/vector/cons/113841.cc: New test.

2024-03-22  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/stl_construct.h (destroy_at, construct_at): Guard
	with feature test macros instead of just __cplusplus.

2024-03-22  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/version.def (generator, tuple_like): Move earlier
	in the file.
	* include/bits/version.h: Regenerate.

2024-03-22  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/114394
	* include/std/functional (bind): Use __invoke_result_t instead
	of result_of::type.
	* include/std/type_traits (__invoke_result_t): New alias
	template.
	* testsuite/20_util/bind/ref_neg.cc: Adjust prune pattern.

2024-03-20  François Dumont  <fdumont@gcc.gnu.org>

	* include/bits/version.def (null_iterators): Remove extra_cond.
	* include/bits/version.h: Regenerate.

2024-03-19  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/114359
	* include/bits/random.tcc (binomial_distribution::param_type):
	Ensure arithmetic is done as type double.
	* testsuite/26_numerics/random/binomial_distribution/114359.cc: New test.

2024-03-19  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/101228
	* include/pstl/parallel_backend_tbb.h (TBB_SUPPRESS_DEPRECATED_MESSAGES):
	Define before including <tbb/task.h> then undef afterwards.

2024-03-19  Jonathan Wakely  <jwakely@redhat.com>

	* include/Makefile.am [MAINTAINER_MODE]: Add target to
	automatically update <bits/version.h>.
	* include/Makefile.in: Regenerate.

2024-03-19  Jonathan Wakely  <jwakely@redhat.com>

	* doc/xml/manual/build_hacking.xml: Document generated files.
	Update list of convenience libraries and sub-directories under
	the src directory.
	* doc/html/*: Regenerate.

2024-03-19  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/text_encoding-data.h: Regenerate.
	* include/bits/unicode-data.h: Regenerate.
	* scripts/gen_text_encoding_data.py: Fix header of generated
	file to name the correct script.

2024-03-19  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/util/pstl/test_utils.h: Fix typos in comments.

2024-03-19  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/114367
	* include/bits/stl_bvector.h (_M_allocate): Use allocator's
	construct function to begin lifetime of words.

2024-03-19  Iain Sandoe  <iain@sandoe.co.uk>

	* testsuite/lib/dg-options.exp (atomic_link_flags): Emit a -B
	option for the path to the uninstalled libatomic.

2024-03-19  Iain Sandoe  <iain@sandoe.co.uk>

	* testsuite/lib/libstdc++.exp (v3_target_compile): Instead of
	/dev/null, use a temporary file for test executables on Darwin.

2024-03-18  François Dumont  <fdumont@gcc.gnu.org>

	* include/debug/safe_iterator.tcc (_Safe_iterator<>::_M_can_advance):
	Accept 0 offset advance on value-initialized iterator.
	* testsuite/23_containers/vector/debug/n3644.cc: New test case.

2024-03-18  François Dumont  <fdumont@gcc.gnu.org>

	* include/debug/safe_local_iterator.tcc
	(_Safe_local_iterator::_M_valid_range): Add _M_value_initialized and
	_M_singular checks.
	* testsuite/23_containers/unordered_set/debug/114316.cc: New test case.

2024-03-17  François Dumont  <fdumont@gcc.gnu.org>

	PR libstdc++/114316
	* include/debug/safe_iterator.tcc (_Safe_iterator<>::_M_valid_range):
	First check if both iterators are value-initialized before checking if
	singular.
	* testsuite/23_containers/set/debug/114316.cc: New test case.
	* testsuite/23_containers/vector/debug/114316.cc: New test case.

2024-03-14  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/114325
	* include/std/format (_Scanner::_M_scan): Pass correct length to
	__to_chars_10_impl.
	* testsuite/std/format/functions/format.cc: Check negative
	integers with empty format-spec.

2024-03-14  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/stl_algo.h (find_end, all_of, none_of, any_of)
	(find_if_not, is_partitioned, partition_point, remove)
	(remove_if, unique, lower_bound, upper_bound, equal_range)
	(binary_search, includes, is_sorted, is_sorted_until, minmax)
	(minmax_element, is_permutation, clamp, find_if, find_first_of)
	(adjacent_find, count, count_if, search, search_n, min_element)
	(max_element): Add nodiscard attribute.
	* include/bits/stl_algobase.h (min, max, lower_bound, equal)
	(lexicographical_compare, lexicographical_compare_three_way)
	(mismatch): Likewise.
	* include/bits/stl_heap.h (is_heap, is_heap_until): Likewise.
	* testsuite/25_algorithms/equal/debug/1_neg.cc: Add dg-warning.
	* testsuite/25_algorithms/equal/debug/2_neg.cc: Likewise.
	* testsuite/25_algorithms/equal/debug/3_neg.cc: Likewise.
	* testsuite/25_algorithms/find_first_of/concept_check_1.cc:
	Likewise.
	* testsuite/25_algorithms/is_permutation/2.cc: Likewise.
	* testsuite/25_algorithms/lexicographical_compare/71545.cc:
	Likewise.
	* testsuite/25_algorithms/lower_bound/33613.cc: Likewise.
	* testsuite/25_algorithms/lower_bound/debug/irreflexive.cc:
	Likewise.
	* testsuite/25_algorithms/lower_bound/debug/partitioned_neg.cc:
	Likewise.
	* testsuite/25_algorithms/lower_bound/debug/partitioned_pred_neg.cc:
	Likewise.
	* testsuite/25_algorithms/minmax/3.cc: Likewise.
	* testsuite/25_algorithms/search/78346.cc: Likewise.
	* testsuite/25_algorithms/search_n/58358.cc: Likewise.
	* testsuite/25_algorithms/unique/1.cc: Likewise.
	* testsuite/25_algorithms/unique/11480.cc: Likewise.
	* testsuite/25_algorithms/upper_bound/33613.cc: Likewise.
	* testsuite/25_algorithms/upper_bound/debug/partitioned_neg.cc:
	Likewise.
	* testsuite/25_algorithms/upper_bound/debug/partitioned_pred_neg.cc:
	Likewise.
	* testsuite/ext/concept_checks.cc: Likewise.
	* testsuite/ext/is_heap/47709.cc: Likewise.
	* testsuite/ext/is_sorted/cxx0x.cc: Likewise.

2024-03-14  xndcn  <xndchn@gmail.com>

	* include/bits/atomic_base.h (__atomic_float::__atomic_float(Fp)):
	Clear padding.
	* testsuite/29_atomics/atomic_float/compare_exchange_padding.cc:
	New test.

2024-03-14  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/66146
	* doc/xml/manual/status_cxx2011.xml: Remove mention of Linux in
	note about std::call_once.
	* doc/xml/manual/status_cxx2014.xml: Likewise.
	* doc/xml/manual/status_cxx2017.xml: Likewise.
	* doc/html/manual/status.html: Regenerate.

2024-03-14  Jonathan Wakely  <jwakely@redhat.com>

	* doc/xml/manual/status_cxx2023.xml: Update C++23 status table.
	* doc/html/manual/status.html: Regenerate.
	* include/bits/version.def: Fix typo in comment.

2024-03-13  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/libstdc++-prettyprinters/cxx11.cc: Move custom_cat
	to namespace scope.

2024-03-13  Jonathan Wakely  <jwakely@redhat.com>

	* doc/xml/manual/debug.xml: Improve docs on debug builds and
	using ASan. Mention _GLIBCXX_ASSERTIONS. Reorder sections to put
	the most relevant ones first.
	* doc/xml/manual/using.xml: Add comma.
	* doc/html/*: Regenerate.

2024-03-13  Jonathan Wakely  <jwakely@redhat.com>

	* doc/xml/manual/debug.xml: Document that concept checking might
	be removed in future.
	* doc/xml/manual/extensions.xml: Likewise.

2024-03-09  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/114240
	* include/bits/chrono_io.h (_Parser::operator()): Assume
	hours(0) for a time_point, so that a time is not required
	to be present.
	* testsuite/std/time/parse/114240.cc: New test.

2024-03-09  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/114279
	* include/bits/chrono_io.h (_Parser::_M_is_leap_second): New
	data member.
	(_Parser::_M_reserved): Reserve padding bits for future use.
	(_Parser::operator()): Set _M_is_leap_second if %S reads 60s.
	(from_stream): Only allow _M_is_leap_second for utc_time and
	local_time. Adjust arithmetic for utc_time so that leap seconds
	are preserved. Use time_point_cast to convert to a possibly
	lower-precision result type.
	* testsuite/std/time/parse.cc: Move to ...
	* testsuite/std/time/parse/parse.cc: ... here.
	* testsuite/std/time/parse/114279.cc: New test.

2024-03-07  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/chrono_io.h (_Parser::operator()): Use
	std::from_chars to parse fractional seconds.

2024-03-07  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/114244
	* include/bits/chrono_io.h (_Parser::operator()): Remove
	redundant uses of duration_cast. Use chrono::round to convert
	long double value to durations with integer representations.
	Check represenation type when deciding whether to skip parsing
	fractional seconds.
	* testsuite/20_util/duration/114244.cc: New test.
	* testsuite/20_util/duration/io.cc: Check that a floating-point
	duration with ratio<1> precision can be parsed.

2024-03-07  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/114103
	* include/bits/version.def (atomic_lock_free_type_aliases): Add
	extra_cond to check for at least one always-lock-free type.
	* include/bits/version.h: Regenerate.
	* include/std/atomic (atomic_signed_lock_free)
	(atomic_unsigned_lock_free): Only use always-lock-free types.
	* src/c++20/tzdb.cc (time_zone::_Impl::RulesCounter): Don't use
	atomic counter if lock-free aliases aren't available.
	* testsuite/29_atomics/atomic/lock_free_aliases.cc: XFAIL for
	targets without lock-free word-size compare_exchange.

2024-03-07  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/chrono (__get_leap_second_info): Update expiry
	time for hardcoded list of leap seconds.
	* testsuite/std/time/tzdb/leap_seconds.cc: Update comment.

2024-03-07  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/23_containers/deque/allocator/default_init.cc: Use
	std::memset instead of __builtin_memset.
	* testsuite/23_containers/forward_list/allocator/default_init.cc:
	Likewise.
	* testsuite/23_containers/list/allocator/default_init.cc:
	Likewise.
	* testsuite/23_containers/map/allocator/default_init.cc:
	Likewise.
	* testsuite/23_containers/set/allocator/default_init.cc:
	Likewise.
	* testsuite/23_containers/unordered_map/allocator/default_init.cc:
	Likewise.
	* testsuite/23_containers/unordered_set/allocator/default_init.cc:
	Likewise.
	* testsuite/23_containers/vector/allocator/default_init.cc:
	Likewise.
	* testsuite/23_containers/vector/bool/allocator/default_init.cc:
	Likewise.
	* testsuite/29_atomics/atomic/compare_exchange_padding.cc:
	Likewise.
	* testsuite/util/atomic/wait_notify_util.h: Likewise.

2024-03-07  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/format (_Arg_store::_S_make_elt): Add two
	static_assert checks to give more user-friendly error messages.
	* testsuite/lib/prune.exp (libstdc++-dg-prune): Prune another
	form of "in requirements with" note.
	* testsuite/std/format/arguments/args_neg.cc: Check for
	user-friendly diagnostics for non-formattable types.
	* testsuite/std/format/string_neg.cc: Likewise.

2024-03-04  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/114147
	* include/std/tuple (tuple::tuple(allocator_arg_t, const Alloc&)):
	Add missing overload of allocator-extended default constructor.
	(tuple<T1,T2>::tuple(allocator_arg_t, const Alloc&)): Likewise.
	* testsuite/20_util/tuple/cons/114147.cc: New test.

2024-02-29  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/format (basic_format_arg::handle::__maybe_const_t):
	Fix condition to check if const type is formattable.
	(basic_format_arg::handle::handle(T&)): Remove redundant
	static_assert.
	* testsuite/std/format/formatter/basic.cc: New test.

2024-02-29  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/113960
	* include/bits/stl_algobase.h (__is_byte_iter): Replace with ...
	(__memcmp_ordered_with): New concept.
	(lexicographical_compare_three_way): Use __memcmp_ordered_with
	instead of __is_byte_iter. Use correct length for memcmp.
	* testsuite/25_algorithms/lexicographical_compare_three_way/113960.cc:
	New test.

2024-02-28  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/114152
	* include/experimental/scope (scope_exit scope_fail): Make
	destructor unconditionally noexcept.
	(scope_sucess): Fix noexcept-specifier.
	* testsuite/experimental/scopeguard/114152.cc: New test.

2024-02-28  Jonathan Wakely  <jwakely@redhat.com>

	* doc/xml/manual/appendix_contributing.xml: Change URLs to use
	https.
	* doc/html/manual/*: Regenerate.

2024-02-28  Jonathan Wakely  <jwakely@redhat.com>

	* doc/xml/manual/appendix_contributing.xml: Replace outdated
	info on ChangeLog entries.
	* doc/html/manual/appendix_contributing.html: Regenerate.

2024-02-28  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/stl_bvector.h (vector<bool, A>::at): Add
	nodiscard.
	* include/bits/stl_vector.h (vector<T, A>::at): Likewise.
	(operator==, operator<=>, operator<, operator!=, operator>)
	(operator<=, operator>=): Likewise.
	* include/debug/vector (operator==, operator<=>, operator<)
	(operator!=, operator>, operator<=, operator>=): Likewise.
	* testsuite/23_containers/vector/nodiscard.cc: New test.

2024-02-28  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/atomic_base.h (operator|, operator&): Add
	noexcept.
	* include/bits/fs_fwd.h (operator&, operator|, operator^)
	(operator~): Add nodiscard to overloads for copy_options, perms,
	perm_options, and directory_options.
	* include/bits/ios_base.h (operator&, operator|, operator^)
	(operator~): Add nodiscard and noexcept to overloads for
	_Ios_Fmtflags, _Ios_Openmode, and _Ios_Iostate.
	(operator|=, operator&=, operator^=): Add constexpr for C++14.
	* include/bits/regex_constants.h (operator&, operator|, operator^)
	(operator~): Add nodiscard and noexcept to overloads for
	syntax_option_type and match_flag_type.
	(operator|=, operator&=, operator^=): Add noexcept.
	* include/std/charconv (operator&, operator|, operator^)
	(operator~): Add nodiscard to overloads for chars_format.
	* include/std/future (operator&, operator|, operator^)
	(operator~): Add nodiscard for overloads for launch.
	(operator&=, operator|=, operator^=): Add constexpr for C++14.
	* include/experimental/bits/fs_fwd.h  (operator&, operator|)
	(operator^, operator~): Add nodiscard to overloads for
	copy_options, perms, and directory_options.
	* testsuite/27_io/ios_base/types/fmtflags/bitmask_operators.cc:
	Add dg-warning for nodiscard warnings.
	* testsuite/27_io/ios_base/types/iostate/bitmask_operators.cc:
	Likewise.
	* testsuite/27_io/ios_base/types/openmode/bitmask_operators.cc:
	Likewise.
	* testsuite/27_io/filesystem/operations/bitmask_types.cc:
	New test.

2024-02-28  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/27_io/basic_ostream/print/1.cc: Check error
	handling.
	* testsuite/27_io/print/1.cc: Likewise.

2024-02-28  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/ostream (vprint_unicode) [__CYGWIN__]: Use POSIX
	code path for Cygwin instead of Windows.
	* include/std/print (vprint_unicode) [__CYGWIN__]: Likewise.
	* testsuite/27_io/basic_ostream/print/1.cc: Only add -lstdc++exp
	for *-*-mingw* targets.
	* testsuite/27_io/print/1.cc: Likewise.

2024-02-28  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/alloc_traits.h: Include <bits/stl_iterator.h> for
	__make_move_if_noexcept_iterator.

2024-02-28  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/stacktrace: Add nodiscard attribute to all
	functions without side effects.

2024-02-20  François Dumont  <fdumont@gcc.gnu.org>

	* include/bits/stl_algobase.h (std::__niter_wrap): Add a call to
	std::__niter_base on res iterator.

2024-02-19  Iain Sandoe  <iain@sandoe.co.uk>
	    Jonathan Wakely  <jwakely@redhat.com>

	PR target/112397
	* configure: Regenerate.
	* configure.ac: Detect if we are building for Darwin.
	* libsupc++/Makefile.am: If we are building for Darwin, then
	suppress hot/cold partitioning for the array allocators.
	* libsupc++/Makefile.in: Regenerated.

2024-02-17  François Dumont  <fdumont@gcc.gnu.org>

	* include/bits/stl_algobase.h (std::__niter_base): Redefine the overload
	definitions for __gnu_debug::_Safe_iterator.
	* include/debug/safe_iterator.tcc (std::__niter_base): Adapt declarations.

2024-02-16  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/87744
	PR libstdc++/113961
	* testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error
	line number.

2024-02-16  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/87744
	PR libstdc++/113931
	* testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error
	line number.

2024-02-16  Jonathan Wakely  <jwakely@redhat.com>

	* doc/xml/manual/debug_mode.xml: Update docs for backtraces.
	* doc/html/manual/debug_mode_using.html: Regenerate.

2024-02-16  Jonathan Wakely  <jwakely@redhat.com>

	* doc/xml/manual/test.xml: Fix spelling of <envar> elements.
	* doc/html/manual/test.html: Regenerate.

2024-02-15  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/113806
	* include/std/bitset (bitset::operator>>=): Remove redundant
	call to _M_do_sanitize.

2024-02-15  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/113807
	* include/std/bitset (bitset::set()): Use memset instead of a
	loop over the individual words.

2024-02-15  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/113811
	* include/bits/stl_algo.h (__rotate): Use unsigned values for
	division.

2024-02-15  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/99117
	* include/std/valarray (valarray::operator=(const _Expr&)):
	Use loop to copy instead of __valarray_copy with _Array.
	* testsuite/26_numerics/valarray/99117.cc: New test.

2024-02-15  Jonathan Wakely  <jwakely@redhat.com>

	* src/c++20/tzdata.zi: Import new file from 2024a release.
	* src/c++20/tzdb.cc (tzdb_list::_Node::_S_read_leap_seconds)
	Update expiry date for leap seconds list.

2024-02-15  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/87744
	* include/bits/random.h [!__SIZEOF_INT128__] (_Select_uint_least_t):
	Define specialization for 64-bit generators with
	non-power-of-two modulus and large constants.
	(__mod): Use if constexpr unconditionally.
	* testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error
	line number.
	* testsuite/26_numerics/random/linear_congruential_engine/87744.cc:
	New test.

2024-02-14  Gerald Pfeifer  <gerald@pfeifer.com>

	* doc/xml/manual/status_cxx2023.xml: Fix C++ item p2442 to be
	version 1.
	* doc/html/manual/status.html: Regenerate.

2024-02-12  Paul Keir  <paul.keir@uws.ac.uk>

	PR libstdc++/113294
	* include/bits/basic_string.h (basic_string::operator=): Use
	_M_use_local_data() instead of _M_local_buf on the moved-from
	string.
	* testsuite/21_strings/basic_string/modifiers/constexpr.cc
	(test_move): New test.

2024-02-09  Ken Matsui  <kmatsui@gcc.gnu.org>

	* include/bits/c++config (_GLIBCXX_HAVE_BUILTIN_IS_SAME):
	Removed.
	* include/std/type_traits (is_same): Use
	_GLIBCXX_USE_BUILTIN_TRAIT instead of
	_GLIBCXX_HAVE_BUILTIN_IS_SAME.
	(is_same_v): Likewise.

2024-02-08  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/shared_ptr_atomic.h: Fix typo in comment.

2024-02-08  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/100147
	* include/bits/gslice.h (operator=): Add comment about lack of
	self-assignment check.

2024-02-08  Jonathan Wakely  <jwakely@redhat.com>

	* include/tr2/type_traits (bases, direct_bases): Use
	__has_builtin to check if required built-ins are supported.

2024-02-07  Patrick Palka  <ppalka@redhat.com>

	PR testsuite/113710
	PR c++/113814
	* include/bits/stl_pair.h (tuple_element): Add forward
	declaration of the partial specialization for tuple.

2024-02-06  Torbjörn SVENSSON  <torbjorn.svensson@foss.st.com>

	* testsuite/lib/libstdc++.exp: Use "nul" for Windows, "/dev/null"
	for other environments.

2024-02-04  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/format (__format::_Spec::_M_reserved): Define new
	bit-field members to reserve padding bits for future extensions.

2024-02-04  Jonathan Wakely  <jwakely@redhat.com>

	* src/experimental/Makefile.am: Use libstdc++fsconvenience.a
	instead of libstdc++fs.a.
	* src/experimental/Makefile.in: Regenerate.
	* src/filesystem/Makefile.am: Build libstdc++fsconvenience.a as
	well.
	* src/filesystem/Makefile.in: Regenerate.

2024-02-04  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/text_encoding-data.h: Regenerate.
	* include/bits/unicode-data.h: Regenerate.
	* scripts/gen_text_encoding_data.py: Add copyright and license
	text to the output.

2024-02-02  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/113335
	* include/bits/std_function.h (__function_guide_helper): Add
	partial specialization for explicit object member functions, as
	per LWG 3617.
	* testsuite/20_util/function/cons/deduction_c++23.cc: Check
	explicit object member functions.
	* testsuite/30_threads/packaged_task/cons/deduction_c++23.cc:
	Likewise.

2024-02-02  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/17_intro/names.cc [_AIX]: Undefine "u".

2024-02-02  Jonathan Wakely  <jwakely@redhat.com>

	* include/experimental/internet (network_v6::network): Define.
	(network_v6::hosts): Finish implementing.
	(network_v6::to_string): Do not concatenate std::string to
	arbitrary std::basic_string specialization.
	* testsuite/experimental/net/internet/network/v6/cons.cc: New
	test.

2024-02-02  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/90276
	* testsuite/25_algorithms/pstl/alg_merge/inplace_merge.cc: Fix
	comparison function to use less-than instead of equality.

2024-02-02  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/90276
	* testsuite/util/pstl/test_utils.h (reverse_invoker): Do not use
	perfect forwarding for iterator arguments.

2024-02-02  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/string_view (basic_string_view(R&&)): Remove
	constraint that traits_type must be the same, as per LWG 3857.
	* testsuite/21_strings/basic_string_view/cons/char/range_c++20.cc:
	Explicit conversion between different specializations should be
	allowed.
	* testsuite/21_strings/basic_string_view/cons/wchar_t/range_c++20.cc:
	Likewise.

2024-02-02  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/syncstream (basic_osyncstream::operator=): Remove
	noexcept, as per LWG 3867.

2024-02-02  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/generator (promise_type::yield_value): Remove
	noexcept from fourth overload, as per LWG 3894.

2024-02-01  Patrick Palka  <ppalka@redhat.com>

	PR libstdc++/113309
	PR libstdc++/109203
	* include/bits/ranges_util.h (__detail::__pair_like): Don't
	define in C++23 mode.
	(__detail::__pair_like_convertible_from): Adjust as per P2165R4.
	(__detail::__is_subrange<subrange>): Moved from <ranges>.
	(__detail::__is_tuple_like_v<subrange>): Likewise.
	* include/bits/stl_iterator.h: Include <bits/utility.h> for
	C++23.
	(__different_from): Move to <concepts>.
	(__iter_key_t): Adjust for C++23 as per P2165R4.
	(__iter_val_t): Likewise.
	* include/bits/stl_pair.h (pair, array): Forward declare.
	(get): Forward declare all overloads relevant to P2165R4
	tuple-like constructors.
	(__is_tuple_v): Define for C++23.
	(__is_tuple_like_v): Define for C++23.
	(__tuple_like): Define for C++23 as per P2165R4.
	(__pair_like): Define for C++23 as per P2165R4.
	(__eligibile_tuple_like): Define for C++23.
	(__eligibile_pair_like): Define for C++23.
	(pair::_S_constructible_from_pair_like): Define for C++23.
	(pair::_S_convertible_from_pair_like): Define for C++23.
	(pair::_S_dangles_from_pair_like): Define for C++23.
	(pair::pair): Define overloads taking a tuple-like type for
	C++23 as per P2165R4.
	(pair::_S_assignable_from_tuple_like): Define for C++23.
	(pair::_S_const_assignable_from_tuple_like): Define for C++23.
	(pair::operator=): Define overloads taking a tuple-like type for
	C++23 as per P2165R4.
	* include/bits/utility.h (ranges::__detail::__is_subrange):
	Moved from <ranges>.
	* include/bits/version.def (tuple_like): Define for C++23.
	* include/bits/version.h: Regenerate.
	* include/std/concepts (__different_from): Moved from
	<bits/stl_iterator.h>.
	(ranges::__swap::__adl_swap): Clarify which __detail namespace.
	* include/std/map (__cpp_lib_tuple_like): Define C++23.
	* include/std/ranges (__detail::__is_subrange): Moved to
	<bits/utility.h>.
	(__detail::__is_subrange<subrange>): Moved to <bits/ranges_util.h>
	(__detail::__has_tuple_element): Adjust for C++23 as per P2165R4.
	(__detail::__tuple_or_pair): Remove as per P2165R4.  Replace all
	uses with plain tuple as per P2165R4.
	* include/std/tuple (__cpp_lib_tuple_like): Define for C++23.
	(__tuple_like_tag_t): Define for C++23.
	(__tuple_cmp): Forward declare for C++23.
	(_Tuple_impl::_Tuple_impl): Define overloads taking
	__tuple_like_tag_t and a tuple-like type for C++23.
	(_Tuple_impl::_M_assign): Likewise.
	(tuple::__constructible_from_tuple_like): Define for C++23.
	(tuple::__convertible_from_tuple_like): Define for C++23.
	(tuple::__dangles_from_tuple_like): Define for C++23.
	(tuple::tuple): Define overloads taking a tuple-like type for
	C++23 as per P2165R4.
	(tuple::__assignable_from_tuple_like): Define for C++23.
	(tuple::__const_assignable_from_tuple_like): Define for C++23.
	(tuple::operator=): Define overloads taking a tuple-like type
	for C++23 as per P2165R4.
	(tuple::__tuple_like_common_comparison_category): Define for C++23.
	(tuple::operator<=>): Define overload taking a tuple-like type
	for C++23 as per P2165R4.
	(array, get): Forward declarations moved to <bits/stl_pair.h>.
	(tuple_cat): Constrain with __tuple_like for C++23 as per P2165R4.
	(apply): Likewise.
	(make_from_tuple): Likewise.
	(__tuple_like_common_reference): Define for C++23.
	(basic_common_reference): Adjust as per P2165R4.
	(__tuple_like_common_type): Define for C++23.
	(common_type): Adjust as per P2165R4.
	* include/std/unordered_map (__cpp_lib_tuple_like): Define for
	C++23.
	* include/std/utility (__cpp_lib_tuple_like): Define for C++23.
	* testsuite/std/ranges/zip/1.cc (test01): Adjust to handle pair
	and 2-tuple interchangeably.
	(test05): New test.
	* testsuite/20_util/pair/p2165r4.cc: New test.
	* testsuite/20_util/tuple/p2165r4.cc: New test.

2024-02-01  Patrick Palka  <ppalka@redhat.com>

	* include/bits/stl_pair.h (pair::_S_const_assignable): Define,
	factored out from ...
	(pair::operator=): ... the constraints of the const overloads.

2024-02-01  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/version.tpl: Do not use def-file-line for each
	macro being defined.
	* include/bits/version.h: Regenerate.

2024-02-01  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/25_algorithms/copy/debug/constexpr_neg.cc: Adjust
	dg-error pattern.
	* testsuite/25_algorithms/copy_backward/debug/constexpr_neg.cc:
	Likewise.
	* testsuite/25_algorithms/equal/debug/constexpr_neg.cc:
	Likewise.
	* testsuite/25_algorithms/lower_bound/debug/constexpr_partitioned_neg.cc:
	Likewise.
	* testsuite/25_algorithms/lower_bound/debug/constexpr_partitioned_pred_neg.cc:
	Likewise.
	* testsuite/25_algorithms/lower_bound/debug/constexpr_valid_range_neg.cc:
	Likewise.
	* testsuite/25_algorithms/upper_bound/debug/constexpr_partitioned_neg.cc:
	Likewise.
	* testsuite/25_algorithms/upper_bound/debug/constexpr_partitioned_pred_neg.cc:
	Likewise.
	* testsuite/25_algorithms/upper_bound/debug/constexpr_valid_range_neg.cc:
	Likewise.

2024-02-01  Jonathan Wakely  <jwakely@redhat.com>

	* include/experimental/internet (network_v4::to_string()):
	Remove lambda and use of resize_and_overwrite.

2024-01-31  Jonathan Wakely  <jwakely@redhat.com>

	* acinclude.m4 (GLIBCXX_CHECK_TEXT_ENCODING): Use <xlocale.h> if
	needed for newlocale.
	* configure: Regenerate.
	* src/c++26/text_encoding.cc: Use <xlocale.h>.

2024-01-31  Jonathan Wakely  <jwakely@redhat.com>
	    Ewan Higgs  <ewan.higgs@gmail.com>

	* include/bits/text_encoding-data.h: Regenerate.
	* scripts/gen_text_encoding_data.py: Add extra_aliases dict
	containing "ASCII".
	* testsuite/std/text_encoding/cons.cc: Check "ascii" is known.

2024-01-31  Jonathan Wakely  <jwakely@redhat.com>

	* doc/xml/manual/using.xml: Update tables of supported headers.
	* doc/html/*: Regenerate.

2024-01-31  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/bitset (_Base_bitset::_M_do_to_ullong): Avoid
	-Wshift-count-overflow warning.

2024-01-30  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/std/time/clock/gps/io.cc: Fix expected result in
	assertion and call test_format() from main.

2024-01-29  François Dumont  <fdumont@gcc.gnu.org>

	* doc/xml/manual/debug_mode.xml: Link against libstdc++exp.a to use
	_GLIBCXX_DEBUG_BACKTRACE macro.

2024-01-24  Huanghui Nie  <nnnjkk@gmail.com>
	    Théo Papadopoulo   <papadopoulo@gmail.com>

	* include/bits/hashtable.h (_Hahstable<>::_M_remove_bucket_begin): Remove
	_M_before_begin check and cleanup implementation.

2024-01-22  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/std/time/clock/file/io.cc: Fix expected result in
	assertion and call test_format() from main.

2024-01-21  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/113500
	* include/bits/chrono_io.h (__formatter_chrono::_M_S): Fix
	printing of subseconds with floating-point rep.
	(__formatter_chrono::_M_format_to_ostream): Do not write
	time_point specializations directly to the ostream.
	(formatter<chrono::sys_time<D>, C>::parse): Do not allow an
	empty chrono-spec if the type fails to meet the constraints for
	writing to an ostream with operator<<.
	* testsuite/std/time/clock/file/io.cc: Check formatting
	non-integral times with empty chrono-specs.
	* testsuite/std/time/clock/gps/io.cc: Likewise.
	* testsuite/std/time/clock/utc/io.cc: Likewise.
	* testsuite/std/time/hh_mm_ss/io.cc: Likewise.

2024-01-21  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/chrono.h (__file_clock::from_sys)
	(__file_clock::to_sys, __file_clock::_S_from_sys)
	(__file_clock::_S_to_sys): Use common_type for return type.
	* testsuite/std/time/clock/file/members.cc: Check round trip
	conversion for time with lower precision that seconds.

2024-01-21  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/113512
	* include/std/format (__formatter_fp::format): Fix logic for
	alternate forms.
	* testsuite/std/format/functions/format.cc: Check buggy cases of
	alternate forms with g presentation type.

2024-01-20  Marek Polacek  <polacek@redhat.com>

	PR c++/111410
	* include/std/ranges: Add #pragma to disable -Wdangling-reference with
	std::ranges::views::__adaptor::operator|.

2024-01-19  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/format (_Spec::_M_parse_fill_and_align): Do not
	use CTAD for _Utf32_view.

2024-01-19  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/108822
	* include/std/tuple (__glibcxx_no_dangling_refs) [C++17]: Fix
	wrong fold-operator.
	* testsuite/20_util/tuple/dangling_ref.cc: Check tuples with one
	element and three elements. Check allocator-extended
	constructors.

2024-01-19  Patrick Palka  <ppalka@redhat.com>

	* include/precompiled/stdc++.h [_GLIBCXX_HOSTED]: Include
	<print> and <text_encoding> for C++23 and C++26 respectively.

2024-01-18  Patrick Palka  <ppalka@redhat.com>

	* include/bits/stl_pair.h [__cplusplus > 202002L]:
	Guard P2321R2 changes with __glibcxx_ranges_zip instead.

2024-01-18  Patrick Palka  <ppalka@redhat.com>

	* include/std/tuple [__cplusplus > 202002L]: Guard P2321R2
	changes with __cpp_lib_ranges_zip instead.

2024-01-18  Patrick Palka  <ppalka@redhat.com>

	PR libstdc++/109536
	* include/debug/safe_base.h (_Safe_sequence_base::_M_swap):
	Remove _GLIBCXX20_CONSTEXPR from non-inline member function.
	* include/debug/safe_iterator.h
	(_GLIBCXX20_CONSTEXPR_NON_LITERAL_SCOPE_BEGIN): Define.
	(_GLIBCXX20_CONSTEXPR_NON_LITERAL_SCOPE_END): Define.
	(_Safe_iterator::operator=): Use them around the code path that
	defines a variable of type __gnu_cxx::__scoped_lock.
	(_Safe_iterator::operator++): Likewise.
	(_Safe_iterator::operator--): Likewise.
	(_Safe_iterator::operator+=): Likewise.
	(_Safe_iterator::operator-=): Likewise.
	* testsuite/23_containers/vector/element_access/constexpr.cc
	(test_iterators): Test more iterator operations.
	* testsuite/23_containers/vector/bool/element_access/constexpr.cc
	(test_iterators): Likewise.
	* testsuite/std/ranges/adaptors/all.cc (test08) [_GLIBCXX_DEBUG]:
	Remove.

2024-01-18  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/unicode.h (__charset_alias_match): Initialize
	__var_a and __var_b.

2024-01-18  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/113450
	* testsuite/std/format/functions/format.cc: Use signed char
	instead of int8_t.

2024-01-17  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/113318
	* acinclude.m4 (GLIBCXX_CONFIGURE): Add c++26 directory.
	(GLIBCXX_CHECK_TEXT_ENCODING): Define.
	* config.h.in: Regenerate.
	* configure: Regenerate.
	* configure.ac: Use GLIBCXX_CHECK_TEXT_ENCODING.
	* include/Makefile.am: Add new headers.
	* include/Makefile.in: Regenerate.
	* include/bits/locale_classes.h (locale::encoding): Declare new
	member function.
	* include/bits/unicode.h (__charset_alias_match): New function.
	* include/bits/text_encoding-data.h: New file.
	* include/bits/version.def (text_encoding): Define.
	* include/bits/version.h: Regenerate.
	* include/std/text_encoding: New file.
	* src/Makefile.am: Add new subdirectory.
	* src/Makefile.in: Regenerate.
	* src/c++26/Makefile.am: New file.
	* src/c++26/Makefile.in: New file.
	* src/c++26/text_encoding.cc: New file.
	* src/experimental/Makefile.am: Include c++26 convenience
	library.
	* src/experimental/Makefile.in: Regenerate.
	* python/libstdcxx/v6/printers.py (StdTextEncodingPrinter): New
	printer.
	* scripts/gen_text_encoding_data.py: New file.
	* testsuite/22_locale/locale/encoding.cc: New test.
	* testsuite/ext/unicode/charset_alias_match.cc: New test.
	* testsuite/std/text_encoding/cons.cc: New test.
	* testsuite/std/text_encoding/members.cc: New test.
	* testsuite/std/text_encoding/requirements.cc: New test.

2024-01-17  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/unicode.h (_Grapheme_cluster_view): Require view.
	Do not use CTAD for _Utf32_view.
	(__format_width, __truncate): Do not use CTAD.
	(enable_borrowed_range<_Utf_view<T, R>>): Define specialization.
	(enable_borrowed_range<_Grapheme_cluster_view<R>>): Likewise.

2024-01-17  Patrick Palka  <ppalka@redhat.com>

	* include/std/ranges (views::_CartesianProduct::operator()):
	Adjust identity case as per P2540R1.
	* testsuite/std/ranges/cartesian_product/1.cc (test01):
	Adjust expected result of the identity case.

2024-01-15  Patrick Palka  <ppalka@redhat.com>

	* include/std/variant (__detail::__variant::_Variadic_union):
	Add bool __trivially_destructible template parameter.
	(__detail::__variant::_Variadic_union::~_Variadic_union):
	Use __trivially_destructible in constraints instead.
	(__detail::__variant::_Variant_storage): Pass
	__trivially_destructible value to _Variadic_union.

2024-01-15  Patrick Palka  <ppalka@redhat.com>

	* include/bits/stl_iterator.h (const_iterator): Define conversion
	operators as per P2836R1.
	* include/bits/version.def (ranges_as_const): Update value.
	* include/bits/version.h: Regenerate.
	* testsuite/24_iterators/const_iterator/1.cc (test04): New test.
	* testsuite/std/ranges/adaptors/as_const/1.cc: Adjust expected
	value of __cpp_lib_ranges_as_const.
	* testsuite/std/ranges/version_c++23.cc: Likewise.

2024-01-15  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/108822
	* include/std/tuple (__assignable, __is_nothrow_assignable):
	Move pre-C++20 definitions adjacent to their use.

2024-01-15  Jonathan Wakely  <jwakely@redhat.com>

	PR testsuite/113366
	* include/std/format (basic_format_arg): Use __formattable
	variable template instead of __format::__formattable_with
	concept.

2024-01-15  Jonathan Wakely  <jwakely@redhat.com>

	* src/c++20/tzdata.zi: Import new file from 2023d release.
	* src/c++20/tzdb.cc (tzdb_list::_Node::_S_read_leap_seconds)
	Update expiry date for leap seconds list.

2024-01-13  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/108822
	* include/std/tuple (tuple): Add checks for dangling references.
	Reimplement constraints and constant expressions using C++20
	features.
	* include/std/type_traits [C++20]
	(__is_implicitly_default_constructible_v): Define.
	(__is_implicitly_default_constructible): Use variable template.
	* testsuite/20_util/tuple/dangling_ref.cc: New test.

2024-01-13  Patrick Palka  <ppalka@redhat.com>

	PR libstdc++/108827
	PR libstdc++/111327
	* include/bits/version.def (bind_back): Define.
	* include/bits/version.h: Regenerate.
	* include/std/functional (_Bind_back): Define for C++23.
	(bind_back): Likewise.
	* testsuite/20_util/function_objects/bind_back/1.cc: New test
	(adapted from corresponding bind_front test).
	* testsuite/20_util/function_objects/bind_back/111327.cc: Likewise.

2024-01-13  Patrick Palka  <ppalka@redhat.com>

	* include/std/functional (_Bind_front): Remove =default special
	member function declarations.
	(_Bind_front::operator()): Implement using C++23 deducing this
	when available.
	* testsuite/20_util/function_objects/bind_front/111327.cc:
	Adjust testcase to expect better errors in C++23 mode.

2024-01-13  Patrick Palka  <ppalka@redhat.com>

	* include/std/ranges (views::__adaptor::operator|): Perform
	perfect forwarding of arguments.
	(views::__adaptor::_RangeAdaptor::operator()): Pass dummy
	first argument to _Partial.
	(views::__adaptor::_Partial::_Partial): Likewise.  Add dummy
	first parameter.
	(views::__adaptor::_Pipe::_Pipe): Perform perfect forwarding
	of arguments.
	(to): Pass dummy first argument to _Partial.

2024-01-13  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/107466
	* include/bits/random.tcc (subtract_with_carry_engine::seed):
	Implement proposed resolution of LWG 4014.
	* testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error
	line number.
	* testsuite/26_numerics/random/subtract_with_carry_engine/cons/lwg3809.cc:
	Check for expected result of 64-bit engine with seed that
	doesn't fit in 32-bits.

2024-01-12  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/113320
	* include/std/format (__format::_Runtime_format_string): Add
	constructor and disable copy operations.
	(basic_format_string(_Runtime_format_string)): Add noexcept and
	take parameter by value not rvalue reference.
	(runtime_format): Add noexcept.
	* testsuite/std/format/runtime_format.cc: Check noexcept. Check
	that construction is only possible from prvalues, not xvalues.

2024-01-12  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/105505
	* include/bits/stl_pair.h (pair::pair(U1&&, U2&&)) [C++23]: Add
	default template arguments, as per P1951R1.
	* testsuite/20_util/pair/cons/default_tmpl_args.cc: New test.

2024-01-12  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/format (__format::_Arg_store): Fix PR number in
	comment. Simplify preprocessor code.

2024-01-11  Jonathan Wakely  <jwakely@redhat.com>

	* doc/xml/manual/evolution.xml: Fix spelling.
	* doc/html/manual/api.html: Regenerate.

2024-01-11  Jonathan Wakely  <jwakely@redhat.com>

	* doc/xml/manual/evolution.xml: Document addition of
	libstdc++exp.a.
	* doc/html/*: Regenerate.

2024-01-11  Marcus Haehnel  <marcus.haehnel@kernkonzept.com>

	* libsupc++/eh_unex_handler.cc: Adjust definition type to
	declaration.

2024-01-11  Michael Levine  <mlevine55@bloomberg.net>

	* include/std/ranges (__glibcxx_want_ranges_iota): Remove
	duplicate definition.

2024-01-11  François Dumont  <fdumont@gcc.gnu.org>

	PR libstdc++/112477
	* src/c++11/debug.cc
	(_Safe_iterator_base::_M_attach): Reset _M_version to 0 if attaching to null
	sequence.
	(_Safe_iterator_base::_M_attach_single): Likewise.
	(_Safe_local_iterator_base::_M_attach): Likewise.
	(_Safe_local_iterator_base::_M_attach_single): Likewise.
	* testsuite/23_containers/map/debug/112477.cc: New test case.

2024-01-11  Patrick Palka  <ppalka@redhat.com>

	* include/bits/move.h (__like_t): Define in C++23 mode.
	* include/std/ranges (views::__adaptor::Partial::operator()):
	Implement using C++23 deducing this when available.
	(views::__adaptor::_Pipe::operator()): Likewise.
	* testsuite/std/ranges/adaptors/100577.cc: Adjust testcase to
	accept new "no match for call" errors issued in C++23 mode.
	* testsuite/std/ranges/adaptors/lazy_split_neg.cc: Likewise.

2024-01-11  Jonathan Wakely  <jwakely@redhat.com>

	* python/libstdcxx/v6/printers.py (StdIntegralConstantPrinter):
	Add printer for std::integral_constant.
	* testsuite/libstdc++-prettyprinters/cxx11.cc: Test it.

2024-01-11  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/113258
	* libsupc++/new_opa.cc: Prefer to use posix_memalign if
	available.

2024-01-11  Ken Matsui  <kmatsui@gcc.gnu.org>

	* src/filesystem/ops-common.h (stat_type): Use using.

2024-01-11  Ken Matsui  <kmatsui@gcc.gnu.org>

	PR libstdc++/113250
	* src/c++17/fs_ops.cc (fs::equivalent): Use || instead of &&.
	* src/filesystem/ops.cc (fs::equivalent): Likewise.
	* testsuite/27_io/filesystem/operations/equivalent.cc: Handle
	error codes.
	* testsuite/experimental/filesystem/operations/equivalent.cc:
	Likewise.

2024-01-11  Ken Matsui  <kmatsui@gcc.gnu.org>

	* include/std/type_traits (is_compound): Do not use __not_.
	(is_compound_v): Use is_fundamental_v instead.

2024-01-11  Patrick Palka  <ppalka@redhat.com>

	* include/bits/utility.h (_Nth_type): Use
	_GLIBCXX_USE_BUILTIN_TRAIT instead of __has_builtin.

2024-01-09  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/unicode-data.h: Regenerate.
	* include/bits/unicode.h (_Utf_iterator::operator++()): Fix off
	by one error.
	(__incb_property): Add missing check for values before the
	first edge.
	(__is_extended_pictographic): Invert return values to fix
	copy&pasted logic.
	(_Grapheme_cluster_view::_Iterator): Remove second iterator
	member and find end of cluster lazily.
	* testsuite/ext/unicode/grapheme_view.cc: New test.
	* testsuite/ext/unicode/properties.cc: New test.
	* testsuite/ext/unicode/view.cc: New test.

2024-01-09  Andreas Schwab  <schwab@linux-m68k.org>

	* scripts/extract_symvers.in: Require final colon to only match
	.dsynsym in the header of the dynamic symtab.

2024-01-09  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/chrono_io.h (__formatter_chrono::_M_F): Simplify
	handling of string returned from std::format.
	(__formatter_chrono::_M_R_T): Likewise.

2024-01-08  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/unicode.h (__null_sentinel): Remove.
	* testsuite/17_intro/names.cc: Add __null_sentinel.

2024-01-08  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/format (__format::_Runtime_format_string): Define
	new class template.
	(basic_format_string): Add non-consteval constructor for runtime
	format strings.
	(runtime_format): Define new function for C++26.
	* testsuite/std/format/runtime_format.cc: New test.

2024-01-08  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/chrono_io.h (__formatter_chrono): Always use
	lvalue arguments to make_format_args.
	* include/std/format (make_format_args): Change parameter pack
	from forwarding references to lvalue references. Remove use of
	remove_reference_t which is now unnecessary.
	(format_to, formatted_size): Remove incorrect forwarding of
	arguments.
	* include/std/ostream (print): Remove forwarding of arguments.
	* include/std/print (print): Likewise.
	* testsuite/20_util/duration/io.cc: Use lvalues as arguments to
	make_format_args.
	* testsuite/std/format/arguments/args.cc: Likewise.
	* testsuite/std/format/arguments/lwg3810.cc: Likewise.
	* testsuite/std/format/functions/format.cc: Likewise.
	* testsuite/std/format/functions/vformat_to.cc: Likewise.
	* testsuite/std/format/string.cc: Likewise.
	* testsuite/std/time/day/io.cc: Likewise.
	* testsuite/std/time/month/io.cc: Likewise.
	* testsuite/std/time/weekday/io.cc: Likewise.
	* testsuite/std/time/year/io.cc: Likewise.
	* testsuite/std/time/year_month_day/io.cc: Likewise.
	* testsuite/std/format/arguments/args_neg.cc: New test.

2024-01-08  Jonathan Wakely  <jwakely@redhat.com>

	* include/Makefile.am: Add new headers.
	* include/Makefile.in: Regenerate.
	* include/bits/unicode.h: New file.
	* include/bits/unicode-data.h: New file.
	* include/std/format: Include <bits/unicode.h>.
	(__literal_encoding_is_utf8): Move to <bits/unicode.h>.
	(_Spec::_M_fill): Change type to char32_t.
	(_Spec::_M_parse_fill_and_align): Read a Unicode scalar value
	instead of a single character.
	(__write_padded): Change __fill_char parameter to char32_t and
	encode it into the output.
	(__formatter_str::format): Use new __unicode::__field_width and
	__unicode::__truncate functions.
	* include/std/ostream: Adjust namespace qualification for
	__literal_encoding_is_utf8.
	* include/std/print: Likewise.
	* src/c++23/print.cc: Add [[unlikely]] attribute to error path.
	* testsuite/ext/unicode/view.cc: New test.
	* testsuite/std/format/functions/format.cc: Add missing examples
	from the standard demonstrating alignment with non-ASCII
	characters. Add examples checking correct handling of extended
	grapheme clusters.

2024-01-08  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/version.def (format_uchar): Define.
	* include/bits/version.h: Regenerate.
	* include/std/format (formatter<C, C>::format): Check for
	_Pres_c and call _M_format_character directly. Cast C to its
	unsigned equivalent for formatting as an integer.
	(formatter<char, wchar_t>::format): Likewise.
	(basic_format_arg(T&)): Store char arguments as unsigned char
	for formatting to a wide string.
	* testsuite/std/format/functions/format.cc: Adjust test. Check
	formatting of

2024-01-07  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/112997
	* libsupc++/unwind-cxx.h (__cxa_call_terminate): Change first
	parameter to void*.

2024-01-07  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/20_util/variant/87619.cc: Remove dg-timeout-factor.

2024-01-07  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/type_traits (is_trivially_destructible_v): Use
	built-in directly when concepts are supported.
	* testsuite/20_util/is_trivially_destructible/value_v.cc: New
	test.

2024-01-06  Gwenole Beauchesne  <gb.devel@gmail.com>

	* testsuite/tr1/8_c_compatibility/cinttypes/functions.cc: Use
	nonnull arguments to strtoimax() and wcstoimax() functions.

2024-01-05  Jonathan Wakely  <jwakely@redhat.com>

	* src/c++17/fs_path.cc (path::_List::reserve): Limit maximum
	size and check for overflows in arithmetic.
	(path::operator/=(const path&)): Remove redundant exponential
	growth calculation.

2024-01-05  Martin Küttler  <martin.kuettler@kernkonzept.com>

	* src/c++17/fs_path.cc (path::_List::reserve): Avoid
	floating-point arithmetic.

2024-01-05  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/113241
	* include/std/type_traits (is_convertible_v): Guard use of
	built-in with preprocessor check.

2024-01-05  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/113200
	* include/bits/char_traits.h (__gnu_cxx::char_traits::move): Use
	__builtin_constant_p to check for unrelated pointers that cannot
	be compared during constant evaluation.
	* testsuite/21_strings/char_traits/requirements/113200.cc: New
	test.

2024-01-05  Cassio Neri  <cassio.neri@gmail.com>

	* include/std/chrono: Fix + and - for months and weekdays.
	* testsuite/std/time/month/1.cc: Add constexpr tests against overflow.
	* testsuite/std/time/month/2.cc: New test for extreme values.
	* testsuite/std/time/weekday/1.cc: Add constexpr tests against overflow.
	* testsuite/std/time/weekday/2.cc: New test for extreme values.

2024-01-05  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/113099
	* include/bits/locale_classes.tcc (__try_use_facet): Use
	if-constexpr for C++11 and up.

2024-01-05  Ken Matsui  <kmatsui@gcc.gnu.org>

	* include/std/type_traits: Use _GLIBCXX_USE_BUILTIN_TRAIT.

2024-01-04  Arsen Arsenović  <arsen@aarsen.me>

	* include/std/generator (_Subyield_state::_M_jump_in): Fix typo
	reported by Will Hawkins <hawkinsw@obs.cr>.

2024-01-04  Arsen Arsenović  <arsen@aarsen.me>

	* include/std/generator (_Stateless_alloc): Rename typename _A
	to _All.

2024-01-03  Patrick Palka  <ppalka@redhat.com>

	PR testsuite/113175
	* testsuite/std/ranges/iota/max_size_type.cc (test02): Reduce
	'limit' to 100 from 1000 and adjust 'log2_limit' accordingly.
	(test03): Likewise.


Copyright (C) 2024 Free Software Foundation, Inc.

Copying and distribution of this file, with or without modification,
are permitted in any medium without royalty provided the copyright
notice and this notice are preserved.
