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

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

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

	* include/std/numeric (ranges): Only declare namespace for C++23
	and later.
	(ranges::iota_result): Fix indentation.
	* testsuite/17_intro/names.cc: Check ranges is not used as an
	identifier before C++20.

2025-04-15  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/109162
	* include/std/format (__format::__has_debug_format, _Pres_type::_Pres_seq)
	(_Pres_type::_Pres_str, __format::__Stackbuf_size): Define.
	(_Separators::_S_squares, _Separators::_S_parens, _Separators::_S_comma)
	(_Separators::_S_colon): Define additional constants.
	(_Spec::_M_parse_fill_and_align): Define overload accepting
	list of excluded characters for fill, and forward existing overload.
	(__formatter_str::_M_format_range): Define.
	(__format::_Buf_sink) Use __Stackbuf_size for size of array.
	(__format::__is_map_formattable, std::range_formatter)
	(std::formatter<_Rg, _CharT>): Define.
	* src/c++23/std.cc.in (std::format_kind, std::range_format)
	(std::range_formatter): Export.
	* testsuite/std/format/formatter/lwg3944.cc: Guarded tests with
	__glibcxx_format_ranges.
	* testsuite/std/format/formatter/requirements.cc: Adjusted for standard
	behavior.
	* testsuite/23_containers/vector/bool/format.cc: Test vector<bool> formatting.
	* testsuite/std/format/ranges/format_kind.cc: New test.
	* testsuite/std/format/ranges/formatter.cc: New test.
	* testsuite/std/format/ranges/sequence.cc: New test.
	* testsuite/std/format/ranges/string.cc: New test.

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

	PR libstdc++/119748
	* include/bits/basic_string.h (_S_copy_chars): Only optimize for
	contiguous iterators that are convertible to const charT*. Use
	explicit conversion to charT after dereferencing iterator.
	(_S_copy_range): Likewise for contiguous ranges.
	* include/bits/basic_string.tcc (_M_construct): Use explicit
	conversion to charT after dereferencing iterator.
	* include/bits/cow_string.h (_S_copy_chars): Likewise.
	(basic_string(from_range_t, R&&, const Allocator&)): Likewise.
	Only optimize for contiguous iterators that are convertible to
	const charT*.
	* testsuite/21_strings/basic_string/cons/char/119748.cc: New
	test.
	* testsuite/21_strings/basic_string/cons/wchar_t/119748.cc:
	New test.

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

	* testsuite/util/testsuite_iterators.h (test_container): Define
	array constructor for C++98 as well.

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.

2025-04-14  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/119725
	* testsuite/std/format/debug.cc: Updated dg-options.
	* testsuite/std/format/debug_nonunicode.cc: Updated dg-options.

2025-04-11  Jonathan Wakely  <jwakely@redhat.com>

	* src/c++17/fast_float/LOCAL_PATCHES: Update.

2025-04-11  Evgeny Karpov  <Evgeny.Karpov@microsoft.com>

	* src/c++17/fast_float/fast_float.h (full_multiplication):
	Support aarch64-w64-mingw32 target.

2025-04-11  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/basic_string.h (_S_copy_chars): Replace overloads
	with constexpr-if and extend optimization to all contiguous
	iterators.
	* src/c++11/string-inst.cc: Extend comment.

2025-04-11  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/111055
	* include/bits/version.def (containers_ranges): Define.
	* include/bits/version.h: Regenerate.
	* include/bits/ranges_base.h (__detail::__container_compatible_range)
	(__detail::__range_to_alloc_type, __detail::__range_mapped_type)
	(__detail::__range_key_type): Depend on __glibcxx_containers_ranges
	instead of __glibcxx_ranges_to_container.
	* include/bits/basic_string.h: Replace __glibcxx_ranges_to_container with
	__glibcxx_containers_ranges.
	* include/bits/cow_string.h: Likewise.
	* include/bits/deque.tcc: Likewise.
	* include/bits/forward_list.h: Likewise.
	* include/bits/stl_bvector.h: Likewise.
	* include/bits/stl_deque.h: Likewise.
	* include/bits/stl_list.h: Likewise.
	* include/bits/stl_map.h: Likewise.
	* include/bits/stl_multimap.h: Likewise.
	* include/bits/stl_multiset.h: Likewise.
	* include/bits/stl_queue.h: Likewise.
	* include/bits/stl_set.h: Likewise.
	* include/bits/stl_stack.h: Likewise.
	* include/bits/stl_vector.h: Likewise.
	* include/bits/unordered_map.h: Likewise.
	* include/bits/unordered_set.h: Likewise.
	* include/bits/vector.tcc: Likewise.
	* include/debug/deque: Likewise.
	* include/debug/forward_list: Likewise.
	* include/debug/list: Likewise.
	* include/debug/map.h: Likewise.
	* include/debug/multimap.h: Likewise.
	* include/debug/multiset.h: Likewise.
	* include/debug/set.h: Likewise.
	* include/debug/unordered_map: Likewise.
	* include/debug/unordered_set: Likewise.
	* include/debug/vector: Likewise.
	* include/std/deque: Provide __cpp_lib_containers_ranges.
	* include/std/forward_list: Likewise.
	* include/std/list: Likewise.
	* include/std/map: Likewise.
	* include/std/queue: Likewise.
	* include/std/set: Likewise.
	* include/std/stack: Likewise.
	* include/std/string: Likewise.
	* include/std/unordered_map: Likewise.
	* include/std/unordered_set: Likewise.
	* include/std/vector: Likewise.
	* testsuite/21_strings/basic_string/cons/from_range.cc: Test for value
	__cpp_lib_containers_ranges.
	* testsuite/23_containers/deque/cons/from_range.cc: Likewise.
	* testsuite/23_containers/forward_list/cons/from_range.cc: Likewise.
	* testsuite/23_containers/list/cons/from_range.cc: Likewise.
	* testsuite/23_containers/map/cons/from_range.cc: Likewise.
	* testsuite/23_containers/multimap/cons/from_range.cc: Likewise.
	* testsuite/23_containers/multiset/cons/from_range.cc: Likewise.
	* testsuite/23_containers/priority_queue/cons_from_range.cc: Likewise.
	* testsuite/23_containers/queue/cons_from_range.cc: Likewise.
	* testsuite/23_containers/set/cons/from_range.cc: Likewise.
	* testsuite/23_containers/stack/cons_from_range.cc: Likewise.
	* testsuite/23_containers/unordered_map/cons/from_range.cc: Likewise.
	* testsuite/23_containers/unordered_multimap/cons/from_range.cc: Likewise.
	* testsuite/23_containers/unordered_multiset/cons/from_range.cc: Likewise.
	* testsuite/23_containers/unordered_set/cons/from_range.cc: Likewise.
	* testsuite/23_containers/vector/bool/cons/from_range.cc: Likewise.
	* testsuite/23_containers/vector/cons/from_range.cc: Likewise.

2025-04-11  Jonathan Wakely  <jwakely@redhat.com>
	    Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/111055
	* include/bits/basic_string.h (_S_copy_range): New function.
	(basic_string(from_range_t, R%%, const Alloc&)): New
	constructor.
	(append_range, assign_range, insert_range, replace_with_range):
	New functions.
	* include/bits/cow_string.h: Likewise.
	* testsuite/21_strings/basic_string/cons/from_range.cc: New
	test.
	* testsuite/21_strings/basic_string/modifiers/append/append_range.cc:
	New test.
	* testsuite/21_strings/basic_string/modifiers/assign/assign_range.cc:
	New test.
	* testsuite/21_strings/basic_string/modifiers/insert/insert_range.cc:
	New test.
	* testsuite/21_strings/basic_string/modifiers/replace/replace_with_range.cc:
	New test.

2025-04-11  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/109162
	* include/bits/chrono_io.h (__detail::_Widen): Moved to std/format file.
	* include/bits/unicode-data.h: Regnerate.
	* include/bits/unicode.h (__unicode::_Utf_iterator::_M_units)
	(__unicode::__should_escape_category): Define.
	* include/std/format (_GLIBCXX_WIDEN_, _GLIBCXX_WIDEN):	Copied from
	include/bits/chrono_io.h.
	(__format::_Widen): Moved from include/bits/chrono_io.h.
	(__format::_Term_char, __format::_Escapes, __format::_Separators)
	(__format::__should_escape_ascii, __format::__should_escape_unicode)
	(__format::__write_escape_seq, __format::__write_escaped_char)
	(__format::__write_escaped_acii, __format::__write_escaped_unicode)
	(__format::__write_escaped): Define.
	(__formatter_str::_S_trunc): Extracted truncation of character
	sequences.
	(__formatter_str::format): Handle _Pres_esc.
	(__formatter_int::_M_do_parse) [__glibcxx_format_ranges]: Parse '?'.
	(__formatter_int::_M_format_character_escaped): Define.
	(formatter<_CharT, _CharT>::format, formatter<char, wchar_t>::format):
	Handle _Pres_esc.
	(__formatter_str::set_debug_format, formatter<...>::set_debug_format)
	Guard with __glibcxx_format_ranges.
	(__format::_Fixedbuf_sink): Define.
	* testsuite/23_containers/vector/bool/format.cc: Use __format::_Widen
	and remove unnecessary <chrono> include.
	* testsuite/std/format/debug.cc: New test.
	* testsuite/std/format/debug_nonunicode.cc: New test.
	* testsuite/std/format/parse_ctx.cc (escaped_strings_supported): Define
	to true if __glibcxx_format_ranges is defined.
	* testsuite/std/format/string.cc (escaped_strings_supported): Define to
	true if __glibcxx_format_ranges is defined.

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

	* include/bits/version.def (constrained_equality): Only define
	as 202411 for C++23 and later, use 202403 for C++20.
	* include/bits/version.h: Regenerate.
	* testsuite/20_util/expected/equality_constrained.cc: Remove
	TODO comment.

2025-04-10  John David Anglin  <danglin@gcc.gnu.org>

	* config/os/hpux/os_defines.h: Remove _GLIBCXX_USE_LONG_LONG
	define.

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>

	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.

2025-04-07  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/119642
	* include/bits/formatfwd.h: Remove stray pragma.

2025-04-07  Jonathan Wakely  <jwakely@redhat.com>

	* include/precompiled/stdc++.h: Include <stdbit.h> and
	<stdckdint.h>. Include <stacktrace> unconditionally.

2025-04-07  Jonathan Wakely  <jwakely@redhat.com>

	* doc/doxygen/user.cfg.in (INPUT): Add flat_map, flat_set,
	text_encoding, stdbit.h and stdckdint.h.

2025-04-07  Thomas Schwinge  <tschwinge@baylibre.com>

	PR target/119645
	* acinclude.m4 (GLIBCXX_ENABLE_LOCK_POLICY) [GCN, nvptx]:
	Hard-code results.
	* configure: Regenerate.
	* configure.host [GCN, nvptx] (atomicity_dir): Set to
	'cpu/generic/atomicity_builtins'.

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

	PR libstdc++/119620
	* include/std/flat_set (_Flat_set_impl::_M_try_emplace): Split
	out into two overloads, one taking at least one argument and one
	taking zero arguments.  Turn __k into an auto&& reference bound
	to __arg if it's already a value_type and otherwise bound to a
	lifetime-extended value_type temporary.
	* testsuite/23_containers/flat_multiset/1.cc (test08): New test.
	* testsuite/23_containers/flat_set/1.cc (test08): New test.

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.

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

	PR libstdc++/109162
	* include/Makefile.am: Add bits/formatfwd.h.
	* include/Makefile.in: Add bits/formatfwd.h.
	* include/bits/version.def: Define __glibcxx_format_ranges without
	corresponding std name.
	* include/bits/version.h: Regenerate.
	* include/std/format (basic_format_context, __format::__char):
	Move declartions to bits/formatfwd.h.
	(formatter<_Tp, _CharT>): Remove default argument for _CharT
	parameter, now specified in forward declaration in bits/formatfwd.h.
	* include/std/vector (formatter<_Bit_reference, _CharT>): Define.
	* include/bits/formatfwd.h: New file with forward declarations
	for bits of std/format.
	* testsuite/23_containers/vector/bool/format.cc: New test.

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

	* include/bits/basic_string.h: Check __glibcxx_string_view and
	__glibcxx_variant instead of __cplusplus >= 2017L.
	* include/bits/cow_string.h: Likewise.

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

	* include/bits/basic_string.tcc: Fix whitespace.

2025-04-04  Arsen Arsenović  <arsen@aarsen.me>

	* include/bits/version.tpl: Implement no_stdname.
	* include/bits/version.def: Document no_stdname.

2025-04-03  Thomas Schwinge  <tschwinge@baylibre.com>

	* config/cpu/nvptx/t-nvptx: Remove.
	* configure.host [nvptx]: Adjust.

2025-04-03  Thomas Schwinge  <tschwinge@baylibre.com>

	PR target/119573
	* config/cpu/nvptx/t-nvptx (AM_MAKEFLAGS): Don't amend.

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  John David Anglin  <danglin@gcc.gnu.org>

	* config/os/hpux/os_defines.h: Only use long long when
	__cplusplus >= 201103L.

2025-04-02  Iain Sandoe  <iain@sandoe.co.uk>

	* testsuite/lib/prune.exp: Prune ld warning about duplicatei
	rpaths.

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  Thomas Schwinge  <tschwinge@baylibre.com>

	PR target/119369
	* config/cpu/gcn/cpu_defines.h: New.
	* configure.host [GCN] (cpu_defines_dir): Point to it.

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.

2025-03-31  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.

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

	PR libstdc++/119550
	* acinclude.m4 (GLIBCXX_STRUCT_TM_TM_ZONE): New macro.
	* config.h.in: Regenerate.
	* configure: Regenerate.
	* configure.ac: Use GLIBCXX_STRUCT_TM_TM_ZONE.
	* include/bits/chrono_io.h (__formatter_chrono::_M_c): Check
	_GLIBCXX_USE_STRUCT_TM_TM_ZONE instead of
	_GLIBCXX_HAVE_STRUCT_TM_TM_ZONE.

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

	* config/abi/pre/gnu.ver (GLIBCXX_3.4.21): Make
	std::basic_string::_M_construct patterns more precise.

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

	PR libstdc++/119545
	* include/std/tuple (operator==): Convert comparison results to
	bool.
	* testsuite/20_util/tuple/comparison_operators/119545.cc: New
	test.

2025-03-31  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/119517
	* include/bits/chrono_io.h (formatter):
	Add __format::__char for _CharT and adjust parse and format
	method signatures.
	* testsuite/std/time/format/pr119517.cc: New test.

2025-03-31  Jakub Jelinek  <jakub@redhat.com>

	PR tree-optimization/103827
	PR tree-optimization/80331
	PR tree-optimization/87502
	* config/abi/pre/gnu.ver (GLIBCXX_3.4.34): Use [jmy] rather than m
	in pattern for _M_construct<bool>(char const*, size_t).

2025-03-30  Jan Hubicka  <hubicka@ucw.cz>

	PR tree-optimization/103827
	PR tree-optimization/80331
	PR tree-optimization/87502
	* config/abi/pre/gnu.ver: Add version for _M_construct<bool>
	* include/bits/basic_string.h: (basic_string::_M_construct<bool>): Declare.
	(basic_string constructors): Use it.
	* include/bits/basic_string.tcc: (basic_string::_M_construct<bool>): New template.
	* src/c++11/string-inst.cc: Instantated S::_M_construct<bool>.

2025-03-28  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/117983
	* testsuite/23_containers/vector/modifiers/insert/117983.cc: New
	test.

2025-03-28  David Malcolm  <dmalcolm@redhat.com>

	* testsuite/17_intro/shared_with_static_deps.cc: Fix malformed
	dg-require-static-libstdcxx directive.
	* testsuite/17_intro/static.cc: Likewise.
	* testsuite/18_support/type_info/110572.cc: Likewise.
	* testsuite/20_util/to_chars/4.cc: Likewise.
	* testsuite/std/time/tzdb_list/pr118811.cc: Likewise.

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.

2025-03-27  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/chrono_io.h (__formatter_chrono::_M_c): Use
	const_cast when setting tm.tm_zone.

2025-03-27  Jonathan Wakely  <jwakely@redhat.com>

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

2025-03-27  Sam James  <sam@gentoo.org>

	* testsuite/std/format/string_neg.cc: Add missing brace for dg-error.

2025-03-27  Giuseppe D'Angelo  <giuseppe.dangelo@kdab.com>

	PR libstdc++/119488
	* include/bits/version.def (constexpr_algorithms): Bump
	the feature-testing macro.
	* include/bits/version.h: Regenerate.
	* testsuite/25_algorithms/cpp_lib_constexpr.cc: Test the
	bumped value for the feature-testing macro.

2025-03-27  Giuseppe D'Angelo  <giuseppe.dangelo@kdab.com>

	* include/bits/algorithmfwd.h (stable_partition): Mark it
	as constexpr for C++26.
	* include/bits/ranges_algo.h (__stable_partition_fn): Likewise.
	* include/bits/stl_algo.h (stable_partition): Mark it as
	constexpr for C++26; during constant evaluation use a new
	codepath where a temporary buffer of 1 element is used.
	* testsuite/25_algorithms/headers/algorithm/synopsis.cc
	(stable_partition): Add constexpr.
	* testsuite/25_algorithms/stable_partition/constexpr.cc: New test.

2025-03-27  Giuseppe D'Angelo  <giuseppe.dangelo@kdab.com>

	* include/bits/algorithmfwd.h (inplace_merge): Mark it as
	constexpr for C++26.
	* include/bits/ranges_algo.h (__inplace_merge_fn): Likewise.
	* include/bits/stl_algo.h (inplace_merge): Mark it as constexpr;
	during constant evaluation, dispatch to the non-allocating
	codepath.
	* testsuite/25_algorithms/headers/algorithm/synopsis.cc
	(inplace_merge): Add constexpr.
	* testsuite/25_algorithms/inplace_merge/constexpr.cc: New test.

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.

2025-03-26  Giuseppe D'Angelo  <giuseppe.dangelo@kdab.com>

	* include/bits/version.def (constexpr_algorithms): Change
	the value of the feature-testing macro.
	* include/bits/version.h: Regenerate.
	* testsuite/25_algorithms/cpp_lib_constexpr.cc: Amend the
	check of the feature-testing macro.

2025-03-26  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/119415
	* include/std/flat_set (_Flat_set_impl:insert_range):
	Replace __detail::__cpp17_input_iterator with __has_input_iter_cat.
	* testsuite/23_containers/flat_multiset/1.cc: New tests
	* testsuite/23_containers/flat_set/1.cc: New tests

2025-03-26  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/111055
	* include/bits/deque.tcc (deque::prepend_range, deque::append_range)
	(deque::insert_range, __advance_dist): Define.
	(deque::_M_range_prepend, deque::_M_range_append):
	Extract from _M_range_insert_aux for _ForwardIterator(s).
	* include/bits/stl_deque.h (deque::assign_range): Define.
	(deque::prepend_range, deque::append_range, deque::insert_range):
	Declare.
	(deque(from_range_t, _Rg&&, const allocator_type&)): Define constructor
	and deduction guide.
	* include/debug/deque (deque::prepend_range, deque::append_range)
	(deque::assign_range):	Define.
	(deque(from_range_t, _Rg&&, const allocator_type&)): Define constructor
	and deduction guide.
	* testsuite/23_containers/deque/cons/from_range.cc: New test.
	* testsuite/23_containers/deque/modifiers/append_range.cc: New test.
	* testsuite/23_containers/deque/modifiers/assign/assign_range.cc:
	New test.
	* testsuite/23_containers/deque/modifiers/prepend_range.cc: New test.
	* testsuite/23_containers/deque/modifiers/insert/insert_range.cc: New file.

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.

2025-03-25  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(from_range_t, R&&)): Use _M_range_initialize_n for sized
	ranges and forward ranges.
	(vector::_M_range_initialize(FwIt, FwIt, forward_iterator_tag)):
	Likewise.
	(vector::_M_range_initialize_n): New function.
	* testsuite/23_containers/vector/cons/108487.cc: New test.

2025-03-25  Jonathan Wakely  <jwakely@redhat.com>

	* include/debug/vector (vector::assign_range): Use change in
	capacity to detect reallocation.
	(vector::insert_range, vector::append_range): Likewise. Remove
	unused variables.

2025-03-25  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/stl_bvector.h (vector::assign_range): More
	efficient implementation for forward/sized ranges.
	(vector::append_range): Handle potentially overlapping range.
	* include/bits/stl_vector.h (vector(from_range_t, R&&, Alloc)):
	Do not use append_range for non-sized input range case.
	(vector::append_range): Handle potentially overlapping range.
	* include/bits/vector.tcc (vector::insert_range): Forward range
	instead of moving it.
	* testsuite/23_containers/vector/bool/modifiers/insert/append_range.cc:
	Test overlapping ranges.
	* testsuite/23_containers/vector/modifiers/append_range.cc:
	Likewise.

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.

2025-03-25  Jonathan Wakely  <jwakely@redhat.com>

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

2025-03-25  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/119415
	* include/std/flat_set (_Flat_set_impl:insert_range):
	Add __detail::__cpp17_input_iterator check.
	* testsuite/23_containers/flat_multiset/1.cc: New tests
	* testsuite/23_containers/flat_set/1.cc: New tests

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.

2025-03-24  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.

2025-03-24  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/stl_bvector.h (vector<bool, A>): Enforce the
	C++20 requirement that the allocator's value_type matches the
	container.
	* testsuite/23_containers/vector/bool/cons/from_range.cc: Fix
	incorrect allocator type.

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

	PR libstdc++/117214
	* configure.ac: Use AC_STRUCT_TIMEZONE.
	* config.h.in: Regenerate.
	* configure: Regenerate.
	* include/bits/chrono_io.h (__formatter_chrono::_M_c): Set
	tm_isdst and tm_zone.
	* testsuite/std/time/format/pr117214.cc: Check %c formatting of
	zoned_time and local time.

2025-03-21  XU Kailiang  <xu2k3l4@outlook.com>
	    Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/117214
	* include/bits/chrono_io.h (__formatter_chrono::_M_c): Use
	_M_locale_fmt to format %c time point.
	* testsuite/std/time/format/pr117214.cc: New test.

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

	* include/bits/chrono_io.h (__formatter_chrono::_M_locale_fmt):
	Imbue locale into ostringstream.
	* testsuite/std/time/format/localized.cc: Check that correct
	locale is used for call to time_put::put.

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

	* include/bits/stl_vector.h (vector(from_range_t, Alloc)): Use
	delegating constructor instead of RAII guards. Use append_range
	for unsized input range case.

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

	* src/c++23/std.compat.cc.in: Only export <stdbit.h> and
	<stdckdint.h> contents for C++26 and later.

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

	* src/c++23/std.cc.in (tuple_element, tuple_element_t)
	(tuple_size, tuple_size_v, get): Export.
	(ranges::cache_latest_view, views::cache_latest): Export.
	(ranges::to_input_view, views::to_input): Export.
	(from_range_t, from_range): Export.

2025-03-20  Tomasz Kamiński  <tkaminsk@redhat.com>

	* include/debug/unordered_map (unordered_map): Add from_range
	constructors and deduction guides.
	(unordered_multimap): Likewise.
	* include/debug/unordered_set (unordered_set): Add from_range
	constructors and deduction guides.
	(unordered_multiset): Likewise.

2025-03-20  Jonathan Wakely  <jwakely@redhat.com>

	* include/debug/map.h (map): Add from_range constructors and
	deduction guides.
	* include/debug/multimap.h (multimap): Likewise.
	* include/debug/multiset.h (multiset): Likewise.
	* include/debug/set.h (set): Likewise.

2025-03-20  Jakub Jelinek  <jakub@redhat.com>

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

2025-03-19  Jonathan Wakely  <jwakely@redhat.com>

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

2025-03-19  Jonathan Wakely  <jwakely@redhat.com>

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

2025-03-19  François Dumont  <frs.dumont@gmail.com>

	* testsuite/23_containers/set/requirements/explicit_instantiation/alloc_ptr.cc:
	Activate the template member tests involving __cpp_lib_ranges_to_container
	support.

2025-03-19  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/20_util/stdbit/1.cc: Include <climits> instead of
	<limits.h>.

2025-03-19  Tomasz Kamiński  <tkaminsk@redhat.com>

	* include/bits/ranges_base.h (__detail::__range_key_type):
	Replace RV::first_type with tuple_element_t<0, RV>.
	(__detail::__range_mapped_type) Replace RV::second_type
	with tuple_element_t<1, RV>.
	* testsuite/23_containers/flat_map/1.cc: New tests.
	* testsuite/23_containers/flat_multimap/1.cc: New tests.
	* testsuite/23_containers/map/cons/from_range.cc: New tests.
	* testsuite/23_containers/multimap/cons/from_range.cc: New tests.
	* testsuite/23_containers/unordered_map/cons/from_range.cc: New tests.
	* testsuite/23_containers/unordered_multimap/cons/from_range.cc:
	New tests.

2025-03-19  Tomasz Kamiński  <tkaminsk@redhat.com>

	* include/bits/unordered_map.h
	(unordered_map(from_range_t, _Rg&&, const allocator_type&))
	(unordered_multimap(from_range_t, _Rg&&, const allocator_type&)):
	Define.
	* include/bits/unordered_set.h
	(unordered_set(from_range_t, _Rg&&, const allocator_type&))
	(unordered_multiset(from_range_t, _Rg&&, const allocator_type&)):
	Define.
	* testsuite/23_containers/unordered_map/cons/from_range.cc: New tests.
	New tests.
	* testsuite/23_containers/unordered_multimap/cons/from_range.cc:
	New tests.
	* testsuite/23_containers/unordered_multiset/cons/from_range.cc:
	New tests.
	* testsuite/23_containers/unordered_set/cons/from_range.cc: New tests.
	* testsuite/std/ranges/conv/1.cc: New tests.

2025-03-19  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/119358
	* include/bits/unordered_map.h (unordered_multimap::insert_range):
	Cast ranges::distance to size_type before passing to _M_rehash_insert.
	* include/bits/unordered_set.h (unordered_multiset::insert_range):
	Same as unordered_multimap::insert_range.
	* testsuite/23_containers/unordered_multimap/cons/from_range.cc:
	New tests.
	* testsuite/23_containers/unordered_multiset/cons/from_range.cc:
	New tests.

2025-03-18  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/111055
	* include/bits/unordered_map.h (unordered_map): Define from_range
	constructors and insert_range member.
	(unordered_multimap): Likewise.
	* testsuite/23_containers/unordered_multimap/cons/from_range.cc:
	New test.
	* testsuite/23_containers/unordered_multimap/modifiers/insert_range.cc:
	New test.
	* testsuite/23_containers/unordered_map/cons/from_range.cc:
	New test.
	* testsuite/23_containers/unordered_map/modifiers/insert_range.cc:
	New test.

2025-03-18  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/111055
	* include/bits/hashtable.h (_M_rehash_insert)
	(_M_insert_range_multi): Extracted rehashing for range insertion
	to separate function.
	* include/bits/unordered_set.h (unordered_set): Define from_range
	constructors and insert_range member.
	(unordered_multiset) Likewise.
	* testsuite/23_containers/unordered_multiset/cons/from_range.cc:
	New test.
	* testsuite/23_containers/unordered_multiset/modifiers/insert_range.cc:
	New test.
	* testsuite/23_containers/unordered_set/cons/from_range.cc:
	New test.
	* testsuite/23_containers/unordered_set/modifiers/insert_range.cc:
	New test.

2025-03-18  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/111055
	* include/bits/stl_multiset.h: (inser_range)
	(multiset(from_range_t, _Rg&&, const _Compare&, const _Alloc&))
	(multiset(from_range_t, _Rg&&, const _Alloc&)):	Define.
	* include/bits/stl_set.h: (set(from_range_t, _Rg&&, const _Alloc&))
	(set(from_range_t, _Rg&&, const _Compare&, const _Alloc&), insert_range):
	Define.
	* testsuite/23_containers/multiset/cons/from_range.cc: New test.
	* testsuite/23_containers/multiset/modifiers/insert/insert_range.cc:
	New test.
	* testsuite/23_containers/set/cons/from_range.cc: New test.
	* testsuite/23_containers/set/modifiers/insert/insert_range.cc:
	New test.

2025-03-18  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/111055
	* include/bits/ranges_base.h (__detail::__range_to_alloc_type):
	Define.
	* include/bits/stl_multimap.h: (inser_range)
	(multimap(from_range_t, _Rg&&, const _Compare&, const _Alloc&))
	(multimap(from_range_t, _Rg&&, const _Alloc&)): Define.
	* include/bits/stl_map.h: (map(from_range_t, _Rg&&, const _Alloc&)) i
	(map(from_range_t, _Rg&&, const _Compare&, const _Alloc&), insert_range):
	Define.
	* testsuite/23_containers/multimap/cons/from_range.cc: New test.
	* testsuite/23_containers/multimap/modifiers/insert/insert_range.cc: New test.
	* testsuite/23_containers/map/cons/from_range.cc: New test.
	* testsuite/23_containers/map/modifiers/insert/insert_range.cc: New test.

2025-03-14  Patrick Palka  <ppalka@redhat.com>

	PR libstdc++/119282
	* include/bits/stl_vector.h (vector::vector(from_range_t)): Add
	missing 'constexpr' to local class _Clear.
	* testsuite/std/ranges/conv/1.cc (test_pr119282): New test.

2025-03-14  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/111138
	* include/std/ranges (_ZipTransform::operator()):
	Create separate overload for calls with empty range pack,
	and add move_constructible, regular_invocable and
	is_object_v<invoke_result_t<...>>> constraints.
	* testsuite/std/ranges/zip_transform/1.cc: New tests
	Jonathan Wakely <jwakely@redhat.com>

2025-03-14  Thomas Schwinge  <tschwinge@baylibre.com>

	PR target/92713
	PR target/101544
	* config/cpu/nvptx/cpu_defines.h: New.
	* config/cpu/nvptx/t-nvptx: Likewise.
	* configure.host: Handle GCN, nvptx.

2025-03-14  Tomasz Kamiński  <tkaminsk@redhat.com>

	* testsuite/23_containers/priority_queue/cons_from_range.cc:
	Add `#include <algorithm>.
	* testsuite/23_containers/priority_queue/members/push_range.cc:
	Add `#include <algorithm>.

2025-03-14  Giuseppe D'Angelo  <giuseppe.dangelo@kdab.com>

	* include/bits/shared_ptr_base.h (lock): Fixed a compile error
	when calling lock() on a weak_ptr<T[]>, by removing an
	erroneous usage of element_type from within lock().
	* testsuite/20_util/shared_ptr/requirements/explicit_instantiation/1.cc:
	Add more tests for array types.
	* testsuite/20_util/weak_ptr/requirements/explicit_instantiation/1.cc:
	Likewise.
	* testsuite/20_util/shared_ptr/requirements/1.cc: New test.
	* testsuite/20_util/weak_ptr/requirements/1.cc: New test.

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.

2025-03-13  Jonathan Wakely  <jwakely@redhat.com>
	    Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/111055
	* include/bits/stl_queue.h (queue(from_range_t, _Rg&&))
	(queue(from_range_t, _Rg&&, const _Alloc&), push_range):
	Define.
	(priority_queue(from_range_t, R&&, const Compare&))
	(push_range): Define.
	* include/bits/stl_stack.h (stack(from_range_t, R&&))
	(stack(from_range_t, R&&, const Alloc&), push_range): Define.
	* testsuite/util/testsuite_iterators.h (test_range_nocopy): Define.
	* testsuite/23_containers/priority_queue/cons_from_range.cc: New test.
	* testsuite/23_containers/priority_queue/members/push_range.cc: New test.
	* testsuite/23_containers/queue/cons_from_range.cc: New test.
	* testsuite/23_containers/queue/members/push_range.cc: New test.
	* testsuite/23_containers/stack/cons_from_range.cc: New test.
	* testsuite/23_containers/stack/members/push_range.cc: New test.

2025-03-13  Jonathan Wakely  <jwakely@redhat.com>

	* include/Makefile.am: Add stdckdint.h.
	* include/Makefile.in: Regenerate.
	* src/c++23/std.compat.cc.in: Export <stdckdint.h> functions.
	* include/c_compatibility/stdckdint.h: New file.
	* testsuite/26_numerics/stdckdint/1.cc: New test.
	* testsuite/26_numerics/stdckdint/2_neg.cc: New test.

2025-03-13  Jonathan Wakely  <jwakely@redhat.com>

	* include/Makefile.am: Add stdbit.h.
	* include/Makefile.in: Regenerate.
	* src/c++23/std.compat.cc.in: Export <stdbit.h> functions.
	* include/c_compatibility/stdbit.h: New file.
	* testsuite/20_util/stdbit/1.cc: New test.
	* testsuite/20_util/stdbit/2_neg.cc: New test.

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.

2025-03-13  Thomas Schwinge  <tschwinge@baylibre.com>

	* acinclude.m4 (GLIBCXX_ENABLE_CXX_FLAGS): Append to
	'EXTRA_CXX_FLAGS' any additional flags.
	* configure: Regenerate.
	* configure.host: Document 'EXTRA_CFLAGS', 'EXTRA_CXX_FLAGS'.

2025-03-13  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/108053
	* include/std/format (basic_format_arg::_M_visit_user):
	Helper function for wrapping extension types into handle.
	(visit_format_arg): Call `_M_visit_user` instead of `_M_visit`.
	(basic_format_arg::visit): As above.
	(__format::__visit_format_arg): Provides direct access to
	values stored in basic_format_arg.
	(__format::__int_from_arg): Use __format::__visit_format_arg
	instead of std::visit_format_arg.
	(_Formatting_scanner::_M_format_arg): As above.
	(_Checking_scanner::__do_vformat_to): As above.
	* testsuite/std/format/arguments/args.cc: New tests.
	* testsuite/std/format/string.cc: Test for using __int128
	as width/precision.

2025-03-12  Patrick Palka  <ppalka@redhat.com>

	* include/bits/version.def (ranges_to_input): Define.
	* include/bits/version.h: Regenerate.
	* include/std/ranges (ranges::to_input_view): Define for C++26.
	(views::__detail::__can_to_input): Likewise.
	(views::_ToInput, views::to_input): Likewise.
	* testsuite/std/ranges/adaptors/to_input/1.cc: New test.

2025-03-12  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/format: Include <bits/monostate.h> instead of
	<variant>.

2025-03-12  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/format (basic_format_parse_context::__once): New
	variable template.
	(basic_format_parse_context::__valid_types_for_check_dynamic_spec):
	New function template for checking argument types.
	(basic_format_parse_context::__check_dynamic_spec): New function
	template to implement the common check_dynamic_spec logic.
	(basic_format_parse_context::check_dynamic_spec_integral): Call
	__check_dynamic_spec instead of check_dynamic_spec.
	(basic_format_parse_context::check_dynamic_spec_string):
	Likewise. Use _CharT instead of char_type consistently.
	(basic_format_parse_context::check_dynamic_spec): Use
	__valid_types_for_check_dynamic_spec for precondition checks and
	call __check_dynamic_spec for checking the arg id.
	* testsuite/std/format/parse_ctx_neg.cc: Adjust expected errors.

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.

2025-03-12  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.

2025-03-12  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.

2025-03-12  Jonathan Wakely  <jwakely@redhat.com>

	* doc/xml/manual/strings.xml: Tweak formatting. Add example
	using lambda.
	* doc/html/manual/strings.html: Regenerate.

2025-03-12  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/unique_ptr.h (unique_ptr::operator*): Add
	static_assert to check for dangling reference, as per LWG 4148.
	* testsuite/20_util/unique_ptr/lwg4148.cc: New test.

2025-03-12  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/ranges_util.h (ranges::_detail::__has_arrow):
	Require operator->() to be valid on const-qualified type, as per
	LWG 4112.
	* testsuite/std/ranges/adaptors/lwg4112.cc: New test.

2025-03-12  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/format
	(basic_format_parse_context::check_dynamic_spec): Require a
	non-empty parameter pack, as per LWG 4142.
	* testsuite/std/format/parse_ctx.cc: Remove call of
	check_dynamic_spec with empty template argument list.
	* testsuite/std/format/parse_ctx_neg.cc: Add dg-error to call of
	check_dynamic_spec with empty template argument list.

2025-03-08  Giuseppe D'Angelo  <giuseppe.dangelo@kdab.com>

	* include/bits/version.def (atomic_value_initialization):
	Guard the FTM with the language concepts FTM.
	* include/bits/version.h: Regenerate.
	* include/std/atomic (atomic): When atomic value init is
	defined, change the defaulted default constructor to
	a non-defaulted one, constraining it as per LWG4169.
	Otherwise, keep the existing constructor.
	Remove the NSDMI for the _M_i member.
	(_GLIBCXX20_INIT): Drop the macro, as it is not needed any more.
	* testsuite/29_atomics/atomic/69301.cc: Test that
	an atomic wrapping a non-default-constructible type is
	always itself non-default-constructible (in all language
	modes).
	* testsuite/29_atomics/atomic/cons/trivial.cc: New test.

2025-03-08  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/stl_algobase.h (__nothrow_contiguous_iterator):
	Remove.
	(__memcpyable_iterators): Simplify.
	(__copy_move_a2, __copy_n_a, __copy_move_backward_a2): Call
	std::to_address on the iterators after advancing them.
	* testsuite/25_algorithms/copy/contiguous.cc: New test.
	* testsuite/25_algorithms/copy_backward/contiguous.cc: New test.
	* testsuite/25_algorithms/copy_n/contiguous.cc: New test.

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.

2025-03-07  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/chrono_io.h (chrono::__detail::from_stream): Add
	deleted function as poison pill for unqualified lookup.

2025-03-07  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/expected (expected<cv void,E>::value()&&):
	Add missing static_assert for LWG 3940.
	* testsuite/20_util/expected/lwg3843.cc: New test.

2025-03-06  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/unique_lock.h (unique_lock::operator=): Fix for
	self-move-assignment.
	* include/std/shared_mutex (shared_lock::operator=): Add
	comment.
	* testsuite/30_threads/shared_lock/cons/lwg4172.cc: New test.
	* testsuite/30_threads/unique_lock/cons/lwg4172.cc: New test.

2025-03-06  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/stl_list.h (list::pop_front, list::pop_back):
	Add non-empty assertions.

2025-03-06  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/ranges_util.h: Include <bits/stl_pair.h>.

2025-03-06  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/span (span::~span): Remove, as per LWG 3903.

2025-03-06  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/119144
	* testsuite/26_numerics/complex/tuple_like.cc: Include
	<algorithm>, replace std::string with std::string_view,
	instantiate tests for long instead of size_t.

2025-03-06  Jonathan Wakely  <jwakely@redhat.com>
	    Thomas Schwinge  <tschwinge@baylibre.com>

	* src/c++20/tzdb.cc [__GTHREADS && !__GTHREADS_CXX0X]: Use
	'__gnu_cxx::__mutex'.

2025-03-06  Thomas Schwinge  <tschwinge@baylibre.com>

	* src/c++20/format.cc (conv): Tag 'out' as '[[maybe_unused]]'.

2025-03-06  Thomas Schwinge  <tschwinge@baylibre.com>

	* src/c++17/fs_dir.cc (do_unlink): Tag 'is_directory' as
	'[[maybe_unused]]'.

2025-03-06  Thomas Schwinge  <tschwinge@baylibre.com>

	* src/filesystem/dir-common.h (openat): Tag 'nofollow' as
	'[[maybe_unused]]'.

2025-03-06  Thomas Schwinge  <tschwinge@baylibre.com>
	    Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/c++config [!__cpp_exceptions]
	(_GLIBCXX_THROW_OR_ABORT): Reference '_EXC'.

2025-03-06  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/20_util/specialized_algorithms/uninitialized_copy/constexpr.cc:
	Do not test COW std::string in constexpr contexts.
	* testsuite/20_util/specialized_algorithms/uninitialized_default_construct/constexpr.cc:
	Likewise.
	* testsuite/20_util/specialized_algorithms/uninitialized_fill/constexpr.cc:
	Likewise.
	* testsuite/20_util/specialized_algorithms/uninitialized_move/constexpr.cc:
	Likewise.
	* testsuite/20_util/specialized_algorithms/uninitialized_value_construct/constexpr.cc:
	Likewise.

2025-03-06  Giuseppe D'Angelo  <giuseppe.dangelo@kdab.com>

	PR libstdc++/113310
	* include/bits/stl_pair.h (get): Forward-declare std::get for
	std::complex.
	* include/bits/version.def (tuple_like): Bump the value of
	the feature-testing macro in C++26.
	* include/bits/version.h: Regenerate.
	* include/std/complex: Implement the tuple protocol for
	std::complex.
	(tuple_size): Specialize for std::complex.
	(tuple_element): Ditto.
	(__is_tuple_like_v): Ditto.
	(complex): Add a private getter to obtain references to the real
	and the imaginary part, on the primary class template and on its
	specializations.
	(get): Add overloads of std::get for std::complex.
	* testsuite/20_util/tuple/tuple_like_ftm.cc: New test.
	* testsuite/26_numerics/complex/tuple_like.cc: New test.

2025-03-05  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/ranges (enumerate_view::_Iterator::operator-):
	Add noexcept, as per LWG 3912.
	* testsuite/std/ranges/adaptors/enumerate/1.cc: Check iterator
	difference is noexcept.

2025-03-05  yxj-github-437  <2457369732@qq.com>

	* src/c++23/std-clib.cc.in (timespec): Move within preprocessor
	group guarded by _GLIBCXX_HAVE_TIMESPEC_GET.

2025-03-05  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/119110
	* testsuite/25_algorithms/move/constrained.cc: Move test06
	function to ...
	* testsuite/25_algorithms/move/105609.cc: New test.
	* testsuite/25_algorithms/move_backward/constrained.cc: Move
	test04 function to ...
	* testsuite/25_algorithms/move_backward/105609.cc: New test.

2025-03-05  Patrick Palka  <ppalka@redhat.com>

	* include/bits/version.def (ranges_cache_latest): Define.
	* include/bits/version.h: Regenerate.
	* include/std/ranges (__detail::__non_propagating_cache::_M_reset):
	Export from base class _Optional_base.
	(cache_latest_view): Define for C++26.
	(cache_latest_view::_Iterator): Likewise.
	(cache_latest_view::_Sentinel): Likewise.
	(views::__detail::__can_cache_latest): Likewise.
	(views::_CacheLatest, views::cache_latest): Likewise.
	* testsuite/std/ranges/adaptors/cache_latest/1.cc: New test.

2025-03-05  Giuseppe D'Angelo  <giuseppe.dangelo@kdab.com>

	* include/bits/stl_algo.h (__stable_sort): Use if consteval
	instead of is_constant_evaluated.

2025-03-05  Patrick Palka  <ppalka@redhat.com>

	PR libstdc++/115215
	PR libstdc++/115218
	* include/std/ranges
	(concat_view::iterator::_S_invoke_with_runtime_index): Use
	__builtin_unreachable in recursive lambda to certify it always
	exits via 'return'.
	(concat_view::iterator::iterator): In the const-converting
	constructor, direct initialize _M_it.
	(views::_Concat::operator()): Adjust constraints in the
	single-argument case as per LWG 4082.
	* testsuite/std/ranges/concat/1.cc (test01): Call it at runtime
	too.
	(test04): New test.

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

2025-03-05  Giuseppe D'Angelo  <giuseppe.dangelo@kdab.com>

	* include/bits/ranges_uninitialized.h: Mark the specialized
	memory algorithms as constexpr in C++26. Also mark the members
	of the _DestroyGuard helper class.
	* include/bits/stl_uninitialized.h: Ditto.
	* include/bits/stl_construct.h: (_Construct_novalue) Mark it
	as constexpr in C++26.
	* include/bits/version.def (raw_memory_algorithms): Bump the
	feature-testing macro for C++26.
	* include/bits/version.h: Regenerate.
	* testsuite/20_util/headers/memory/synopsis.cc: Add constexpr to
	the uninitialized_* algorithms (when in C++26) in the test.
	* testsuite/20_util/specialized_algorithms/feature_test_macro.cc:
	New test.
	* testsuite/20_util/specialized_algorithms/uninitialized_copy/constexpr.cc:
	New test.
	* testsuite/20_util/specialized_algorithms/uninitialized_default_construct/constexpr.cc:
	New test.
	* testsuite/20_util/specialized_algorithms/uninitialized_fill/constexpr.cc:
	New test.
	* testsuite/20_util/specialized_algorithms/uninitialized_move/constexpr.cc:
	New test.
	* testsuite/20_util/specialized_algorithms/uninitialized_value_construct/constexpr.cc:
	New test.

2025-03-04  Jonathan Wakely  <jwakely@redhat.com>

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

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.

2025-02-28  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.

2025-02-28  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.

2025-02-28  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.

2025-02-28  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.

2025-02-27  Jonathan Wakely  <jwakely@redhat.com>

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

2025-02-26  Patrick Palka  <ppalka@redhat.com>

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

2025-02-25  Giuseppe D'Angelo  <giuseppe.dangelo@kdab.com>

	* include/bits/algorithmfwd.h (stable_sort): Add constexpr.
	* include/bits/ranges_algo.h (__stable_sort_fn): Add constexpr
	to the function call operators.
	* include/bits/stl_algo.h (__stable_sort): Add constexpr.
	During constant evaluation, always use the non-allocating path.
	(stable_sort): Add constexpr.
	(__inplace_stable_sort): Likewise.
	(__merge_without_buffer): Likewise.
	* include/bits/version.def (constexpr_algorithms): Bump value
	for C++26.
	* include/bits/version.h: Regnerate.
	* testsuite/25_algorithms/cpp_lib_constexpr.cc: Test the bumped
	feature-testing macro.
	* testsuite/25_algorithms/headers/algorithm/synopsis.cc: Adapt
	the test to constexpr stable_sort.
	* testsuite/25_algorithms/stable_sort/constexpr.cc: New test.

2025-02-25  Giuseppe D'Angelo  <giuseppe.dangelo@kdab.com>

	* include/bits/c++config (_GLIBCXX26_CONSTEXPR): New macro.

2025-02-25  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/93059
	* include/bits/stl_algobase.h (__fill_a1): Fix typo in SFINAE
	constraint.

2025-02-25  François Dumont  <frs.dumont@gmail.com>

	* include/bits/hashtable_policy.h
	(_Hash_code_base::_M_copy_code, _Hash_code_base::_M_store_code): Remove.
	* include/bits/hashtable.h (_M_hash_code_ext): New.
	(_M_merge_multi(_Hashtable&)): Use latter.
	(_M_copy_code): New.
	(_M_assign): Use latter.
	(_M_bucket_index_ex): New.
	(_M_equals): Use latter.
	(_M_store_code): New.
	(_M_src_hash_code): Remove key_type parameter.
	* testsuite/23_containers/unordered_map/modifiers/merge.cc (test10): New
	test case.

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.

2025-02-22  Jonathan Wakely  <jwakely@redhat.com>

	PR c++/118981
	* src/c++20/tzdb.cc: Use init_priority(98) instead of
	init_priority(99).

2025-02-22  Thomas Schwinge  <tschwinge@baylibre.com>

	* testsuite/lib/prune.exp (proc libstdc++-dg-prune): Turn
	'sorry, unimplemented: dynamic stack allocation not supported' into
	UNSUPPORTED.

2025-02-22  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/atomic_base.h (__atomic_base<_ITp>): Remove
	misleading comment.

2025-02-22  Jonathan Wakely  <jwakely@redhat.com>

	* src/c++17/floating_from_chars.cc (__floating_from_chars_hex):
	Remove redundant cast.

2025-02-20  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/118559
	* include/std/type_traits (rank, rank_v): Do not use
	__array_rank for Clang 19 and older.

2025-02-20  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/c++config (_GLIBCXX_HAS_BUILTIN): Add parentheses.

2025-02-20  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/118855
	* include/std/bit (__count_lzero, __count_rzero, __popcount):
	Use type-generic built-ins when available.

2025-02-20  Jonathan Wakely  <jwakely@redhat.com>

	* include/experimental/bits/simd.h (__find_next_valid_abi): Cast
	__bit_ceil argument to unsigned.
	* src/c++17/floating_from_chars.cc (__floating_from_chars_hex):
	Cast __bit_ceil argument to unsigned.
	* src/c++17/memory_resource.cc (big_block): Cast __bit_width
	argument to unsigned.

2025-02-20  Jonathan Wakely  <jwakely@redhat.com>

	* src/c++17/memory_resource.cc (default_res): Define here
	instead of including default_resource.h.
	* src/c++98/globals_io.cc (__ioinit): Define here instead of
	including ios_base_init.h.
	* src/c++17/default_resource.h: Removed.
	* src/c++98/ios_base_init.h: Removed.

2025-02-20  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/118811
	* src/c++20/tzdb.cc (tzdb_list::_Node): Use init_priority
	attribute on static data members.
	* testsuite/std/time/tzdb_list/pr118811.cc: New test.

2025-02-20  Patrick Palka  <ppalka@redhat.com>

	* include/std/ranges (concat_view::iterator): Rename to ...
	(concat_view::_Iterator): ... this throughout.

2025-02-20  Patrick Palka  <ppalka@redhat.com>

	PR libstdc++/115209
	* include/bits/version.def (ranges_concat): Depend on
	__cpp_pack_indexing.
	* include/bits/version.h: Regenerate.
	* include/std/ranges (__detail::__last_is_common): Remove.
	(__detail::__all_but_first_sized): New.
	(concat_view::end): Use C++26 pack indexing instead of
	__last_is_common as per R8 of P2542.
	(concat_view::iterator::operator-): Update constraints on
	iter/sent overloads as per R8 of P2542.

2025-02-15  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/shared_ptr_base.h: Do not include <bit>.

2025-02-15  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/100612
	* include/std/thread (__pmf_expects_stop_token): Constrain
	variable template specialization with concept. Add comment.

2025-02-15  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/range_access.h (rbegin, rend, crbegin, crend):
	Add conditional noexcept, as per P3623R0.
	* testsuite/24_iterators/headers/iterator/range_access.cc: Add
	noexcept-specifier to rbegin, rend, crbegin and crend
	declarations.

2025-02-15  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/24_iterators/headers/iterator/range_access_c++11.cc:
	Removed.
	* testsuite/24_iterators/headers/iterator/range_access_c++14.cc:
	Removed.
	* testsuite/24_iterators/headers/iterator/range_access_c++17.cc:
	Removed.
	* testsuite/24_iterators/headers/iterator/range_access.cc:
	New test.

2025-02-14  Andrew Pinski  <quic_apinski@quicinc.com>

	PR libstdc++/118865
	* include/bits/stl_list.h (_M_initialize_dispatch): Add an
	unreachable if the iterator was not empty that the list will
	now be not empty.

2025-02-14  Jonathan Wakely  <jwakely@redhat.com>

	* include/parallel/algobase.h (__mismatch_switch): Qualify calls
	to make_pair to avoid ADL.

2025-02-14  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/stl_tree.h (_Rb_tree::_M_equal_range): Replace
	unqualified call to make_pair with explicit construction of
	std::pair.
	* testsuite/23_containers/set/operations/equal_range_adl.cc:
	New test.

2025-02-14  Matthew Malcomson  <mmalcomson@nvidia.com>
	    Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/atomic_base.h (__atomic_fetch_addable): Define
	new concept.
	(__atomic_impl::__fetch_add_flt): Use new concept to make use of
	__atomic_fetch_add when available.
	(__atomic_fetch_subtractable, __fetch_sub_flt): Likewise.
	(__atomic_add_fetchable, __add_fetch_flt): Likewise.
	(__atomic_sub_fetchable, __sub_fetch_flt): Likewise.

2025-02-08  Thomas Schwinge  <tschwinge@baylibre.com>

	* testsuite/lib/prune.exp (libstdc++-dg-prune): Turn
	'sorry, unimplemented: exception handling not supported' into
	UNSUPPORTED.

2025-02-08  Thomas Schwinge  <tschwinge@baylibre.com>

	* testsuite/lib/prune.exp (libstdc++-dg-prune): Clarify
	effective-target 'exceptions_enabled'.

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.

2025-02-07  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/ostream.h (basic_ostream::_Disable_exceptions):
	RAII helper type.
	(basic_ostream::sentry::~sentry): Use _Disable_exceptions. Add
	try-catch block around call to pubsync.
	* testsuite/27_io/basic_ostream/exceptions/char/lwg4188.cc: New
	test.
	* testsuite/27_io/basic_ostream/exceptions/wchar_t/lwg4188.cc:
	New test.

2025-02-07  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/111050
	* include/bits/hashtable_policy.h (_Hash_node_value_base): Add
	comment about always_inline attributes.

2025-02-05  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
	    Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/118701
	* config/abi/pre/gnu.ver (CXXABI_1.3.16): Move __riscv guard
	around version.
	* scripts/extract_symvers.pl: Allow for weak versions.
	* testsuite/util/testsuite_abi.cc (check_version): Wrap
	CXXABI_1.3.16 in __riscv.

2025-01-31  Patrick Palka  <ppalka@redhat.com>

	PR libstdc++/118156
	* include/std/flat_map (_Flat_map_impl::_M_insert): Generalized
	version of insert taking heterogenous iterator/sentinel pair.
	(_Flat_map_impl::insert): Dispatch to _M_insert.
	(_Flat_map_impl::insert_range): Likewise.
	(flat_map): Export _Flat_map_impl::insert_range.
	(flat_multimap): Likewise.
	* include/std/flat_set (_Flat_set_impl::insert_range):
	Reimplement directly, not in terms of insert.
	(flat_set): Export _Flat_set_impl::insert_range.
	(flat_multiset): Likewise.
	* testsuite/23_containers/flat_map/1.cc (test06): New test.
	* testsuite/23_containers/flat_multimap/1.cc (test06): New test.
	* testsuite/23_containers/flat_multiset/1.cc (test06): New test.
	* testsuite/23_containers/flat_set/1.cc (test06): New test.

2025-01-31  Patrick Palka  <ppalka@redhat.com>

	* include/bits/stl_bvector.h (vector<bool>::insert_range):
	Consistently return an iterator pointing to the first element
	inserted.
	* include/bits/vector.tcc (vector::insert_range): Likewise.
	* testsuite/23_containers/vector/bool/modifiers/insert/insert_range.cc:
	Verify insert_range return values.
	* testsuite/23_containers/vector/modifiers/insert/insert_range.cc:
	Likewise.

2025-01-30  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/98749
	* include/std/latch (latch::max()): Ensure the return value is
	representable as the return type.
	(latch::latch(ptrdiff_t)): Add assertion.
	(latch::count_down): Fix copy & pasted duplicate assertion. Use
	std::cmp_equal to compare __platform_wait_t and ptrdiff_t
	values.
	(latch::_M_a): Use defined constant for alignment.
	* testsuite/30_threads/latch/1.cc: Check max(). Check constant
	initialization works for values in the valid range. Check
	alignment.

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  Andreas Schwab  <schwab@suse.de>

	PR libstdc++/118563
	* testsuite/util/testsuite_abi.cc (check_version): Add
	CXXABI_1.3.16.
	* config/abi/pre/gnu.ver (CXXABI_1.3.14) [__riscv]: Exclude
	typeinfo for bfloat16_t.
	(CXXABI_1.3.16) [__riscv]: Add it here.

2025-01-23  Jan Hubicka  <jh@suse.cz>

	PR target/80813
	* include/bits/stl_bvector.h (vector<bool, _Alloc>::operator []): Do
	not use iterators.

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>

	PR libstdc++/99995
	* include/Makefile.am: Add new header.
	* include/Makefile.in: Regenerate.
	* include/bits/unique_ptr.h: Include bits/ostream.h instead of
	ostream.
	* include/std/ostream: Include new header.
	* include/bits/ostream.h: New file.

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.

2025-01-16  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.

2025-01-15  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/27_io/ios_base/types/openmode/case_label.cc: Use
	standard feature test macro not internal one.

2025-01-15  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/23_containers/set/requirements/explicit_instantiation/alloc_ptr.cc:
	Guard node extraction checks with feature test macro. Remove
	calls to non-existent range members.
	* testsuite/23_containers/forward_list/requirements/explicit_instantiation/alloc_ptr.cc:
	Use standard macro not internal one.
	* testsuite/23_containers/list/requirements/explicit_instantiation/alloc_ptr.cc:
	Likewise.

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.

2025-01-15  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/28_regex/traits/char/transform_primary.cc: Fix
	subclause numbering in references to the standard.

2025-01-15  Jakub Jelinek  <jakub@redhat.com>

	PR c++/118387
	* testsuite/25_algorithms/default_template_value.cc
	(Input::operator<=>): Use auto as return type rather than bool.

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>

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

2025-01-10  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/atomic_futex.h (__atomic_futex_unsigned): Remove
	names of unused parameters in non-futex implementation.

2025-01-08  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/move.h (__addressof, forward, forward_like, move)
	(move_if_noexcept, addressof): Add always_inline attribute.
	Replace _GLIBCXX_NODISCARD with [[__nodiscard__]].

2025-01-08  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/118260
	* python/hook.in: Run 'skip' commands for some simple accessor
	functions.

2025-01-08  Nicolas Werner  <nicolas.werner@hotmail.de>

	PR libstdc++/106852
	* src/c++23/std.cc.in (to_underlying): Add.

2025-01-08  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/118177
	* src/c++23/std-clib.cc.in: Use preprocessor conditions for
	names which are not always defined.
	* src/c++23/std.cc.in: Likewise.

2025-01-08  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/span: Fix indentation.

2025-01-08  Giuseppe D'Angelo  <giuseppe.dangelo@kdab.com>

	* include/bits/version.def: Add the new feature-testing macro.
	* include/bits/version.h: Regenerate.
	* include/std/span: Add constructor from initializer_list.
	* testsuite/23_containers/span/init_list_cons.cc: New test.
	* testsuite/23_containers/span/init_list_cons_neg.cc: New test.

2025-01-08  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/span (__detail::__extent_storage): Check
	precondition in constructor. Add consteval constructor for valid
	lengths and deleted constructor for invalid constant lengths.
	Make member functions always_inline.
	(__detail::__span_ptr): New class template.
	(span): Adjust constructors to use a std::integral_constant
	value for constant lengths. Declare all specializations of
	std::span as friends.
	(span::first<C>, span::last<C>, span::subspan<O,C>): Use new
	private constructor.
	(span(__span_ptr<T>)): New private constructor for constant
	lengths.

2025-01-08  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/85824
	PR libstdc++/94409
	PR libstdc++/98723
	PR libstdc++/118105
	* include/bits/locale_classes.tcc (collate::do_transform): Check
	errno after calling _M_transform. Use RAII type to manage the
	buffer and to restore errno.
	* include/bits/regex.h (regex_traits::transform_primary): Handle
	exceptions from std::collate::transform and do not try to use
	std::collate for user-defined facets.

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.

2025-01-08  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.

2025-01-08  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.

2025-01-08  Jonathan Wakely  <jwakely@redhat.com>

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

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

	* doc/html/manual/profile_mode.html: Delete.
	* doc/html/manual/profile_mode_api.html: Ditto.
	* doc/html/manual/profile_mode_cost_model.html: Ditto.
	* doc/html/manual/profile_mode_design.html: Ditto.
	* doc/html/manual/profile_mode_devel.html: Ditto.
	* doc/html/manual/profile_mode_impl.html: Ditto.

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