2025-12-29  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>

	* configure: Regenerate.

2025-12-22  Tomasz Kamiński  <tkaminsk@redhat.com>

	* doc/html/manual/using_macros.html: Regenerate.
	* doc/xml/manual/using.xml: Add entries for
	_GLIBCXX_USE_OLD_GENERATE_CANONICAL and
	_GLIBCXX_USE_VARIANT_CXX17_OLD_ABI.

2025-12-19  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/112591
	* include/std/variant (_Uninitialized::_M_get, __get_n)
	(_Uninitialized<_Type, false>): Add _GLIBCXX_USE_VARIANT_CXX17_OLD_ABI
	check to preprocessor guard.
	* testsuite/20_util/variant/112591.cc: Updated tests.
	* testsuite/20_util/variant/112591_compat.cc: New test.
	* testsuite/20_util/variant/constinit.cc: New test.
	* testsuite/20_util/variant/constinit_compat.cc: New test.

2025-12-19  Tomasz Kamiński  <tkaminsk@redhat.com>

	* testsuite/26_numerics/random/uniform_real_distribution/operators/gencanon_eng.cc:
	Test __float128 when available.

2025-12-19  Tomasz Kamiński  <tkaminsk@redhat.com>

	* include/bits/random.h (__rand_uint128::operator>)
	(__rand_uint128::operator>=): Define.
	* include/bits/random.tcc (__generate_canonical_pow2):
	Adjust for use of __rand_uint128 in C++11.
	(__gen_can_pow, __gen_can_rng_calls_needed): Replace with
	__gen_canon_log.
	(__gen_canon_log_res, __gen_canon_log): Define.
	(__generate_canonical_any): Reworked how _UInt is determined.
	* testsuite/26_numerics/random/uniform_real_distribution/operators/gencanon_eng.cc:
	New test.

2025-12-19  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/123147
	* include/bits/chrono_io.h (_Parser::operator()) <%S>: Use a
	buffer of narrow characters to be parsed by std::from_chars.
	* testsuite/std/time/parse/parse.cc: Check wchar_t parsing.

2025-12-19  Tomasz Kamiński  <tkaminsk@redhat.com>

	* include/debug/helper_functions.h (__gnu_debug::__can_advance):
	Declare as _GLIBCXX20_CONSTEXPR.
	* include/debug/safe_iterator.h (__gnu_debug::__can_advance):
	Define as _GLIBCXX20_CONSTEXPR, and return true for constexpr
	evaluation.
	(__gnu_debug::__base): Define as _GLIBCXX20_CONSTEXPR.

2025-12-19  Jonathan Wakely  <jwakely@redhat.com>

	* src/c++11/mutex.cc [_GLIBCXX_NO_EXTERN_THREAD_LOCAL]
	(__get_once_call): Use std::add_lvalue_reference.

2025-12-18  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/chrono_io.h (__formatter_chrono::_M_write): Add
	maybe_unused attribute to avoid -Wunused-parameter warning.
	* src/c++20/tzdb.cc (detect_windows_zone): Decay array to
	pointer to avoid -Warray-compare warning.

2025-12-18  LIU Hao  <lh_mouse@126.com>
	    Jonathan Wakely  <jwakely@redhat.com>

	* config/os/mingw32-w64/os_defines.h (_GLIBCXX_NO_EXTERN_THREAD_LOCAL):
	New macro.
	* include/std/mutex [_GLIBCXX_NO_EXTERN_THREAD_LOCAL]
	(__get_once_callable, __get_once_call): Declare new functions.
	* src/c++11/mutex.cc [_GLIBCXX_NO_EXTERN_THREAD_LOCAL]
	(__get_once_callable, __get_once_call): Define.

2025-12-18  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/123180
	* include/bits/ranges_algo.h (__stable_sort_fn::operator()): Fix
	sense of null check. Replace typedef with alias-declaration.
	* testsuite/25_algorithms/stable_sort/123180.cc: New test.

2025-12-18  Jonathan Wakely  <jwakely@redhat.com>
	    Jakub Jelinek  <jakub@redhat.com>

	* include/bits/random.tcc (__generate_canonical_pow2): Adjust
	comments. Remove _UInt template parameter and define it in the
	body using _Select_uint_least_t<__d>. Remove popcount call for
	getting the width of the _UInt type. Cast floating-point
	literal to _RealT.
	(__generate_canonical_any): Remove _UInt template parameter and
	define it in the body using _Select_uint_least_t<__d * 2>. Use
	direct-initialization for _UInt variables. Cast floating-point
	literal to _RealT.
	(generate_canonical): Remove unused typedef. Remove constexpr-if
	branches and remove unsigned type from template argument lists.

2025-12-17  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/version.def (constexpr_exceptions): Add
	cxx11abi=yes.
	* include/bits/version.h: Regenerate.
	* testsuite/18_support/exception/version.cc: Require effectiove
	target cxx11_abi.
	* testsuite/18_support/exception_ptr/exception_ptr_cast.cc: Only
	check for constexpr support in cxx11 ABI.
	* testsuite/19_diagnostics/headers/stdexcept/version.cc: Require
	effective target cxx11_abi.
	* testsuite/19_diagnostics/logic_error/constexpr.cc: Likewise.
	* testsuite/19_diagnostics/runtime_error/constexpr.cc: Likewise.
	* testsuite/20_util/expected/version.cc: Only check for
	__cpp_lib_constexpr_exceptions macro for cxx11 ABI.
	* testsuite/20_util/optional/version.cc: Likewise.
	* testsuite/20_util/variant/version.cc: Likewise.

2025-12-17  Jonathan Wakely  <jwakely@redhat.com>
	    Jakub Jelinek  <jakub@redhat.com>

	* include/bits/random.h [!__SIZEOF_INT128__] (__rand_uint128):
	Refactor and rename _Select_uint_least_t<128>::type to a new
	class. Make all members constexpr. Add new member functions for
	additional arithmetic and bitwise operations, and comparisons.
	(__detail::_Select_uint_least_t<>::type): Define as an alias of
	__rand_uint128.
	* include/bits/random.tcc (philox_engine::_M_mulhi): Use
	_Select_uint_least_t<w*2>::type instead of __uint128_t.
	(philox_engine::_M_transition): Likewise.
	* include/bits/version.def (philox_engine): Remove extra_cond.
	* include/bits/version.h: Regenerate.
	* testsuite/26_numerics/random/philox4x32.cc: Remove
	dg-require-cpp-feature-test directive.
	* testsuite/26_numerics/random/philox4x64.cc: Likewise.
	* testsuite/26_numerics/random/philox_engine/cons/copy.cc:
	Likewise.
	* testsuite/26_numerics/random/philox_engine/cons/default.cc:
	Likewise.
	* testsuite/26_numerics/random/philox_engine/cons/seed.cc:
	Likewise.
	* testsuite/26_numerics/random/philox_engine/operators/equal.cc:
	Likewise.
	* testsuite/26_numerics/random/philox_engine/operators/serialize.cc:
	Likewise.
	* testsuite/26_numerics/random/philox_engine/requirements/constants.cc:
	Likewise.
	* testsuite/26_numerics/random/philox_engine/requirements/typedefs.cc:
	Likewise.

2025-12-17  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/26_numerics/random/uniform_real_distribution/operators/64351.cc:
	Add -fexcess-precision=standard to options.
	* testsuite/26_numerics/random/uniform_real_distribution/operators/gencanon.cc:
	Likewise.

2025-12-17  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/26_numerics/random/uniform_real_distribution/operators/64351.cc
	[_GLIBCXX_USE_OLD_GENERATE_CANONICAL]: Restore test01. Do not discard an
	extra value in test02.
	* testsuite/26_numerics/random/uniform_real_distribution/operators/gencanon.cc:
	Skip if _GLIBCXX_USE_OLD_GENERATE_CANONICAL is defined in options.

2025-12-17  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/random.h [!_GLIBCXX_USE_OLD_GENERATE_CANONICAL]
	(generate_canonical): Use inline namespace _V2.
	* include/bits/random.tcc [!_GLIBCXX_USE_OLD_GENERATE_CANONICAL]
	(generate_canonical): Likewise.
	* testsuite/26_numerics/random/pr60037-neg.cc: Remove lineno so
	that one dg-error matches both diagnostics.

2025-12-17  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/random.tcc [_GLIBCXX_USE_OLD_GENERATE_CANONICAL]
	(generate_canonical): Restore braces around statement.

2025-12-17  Tomasz Kamiński  <tkaminsk@redhat.com>

	* include/bits/random.tcc (generate_canonical)
	[!_GLIBCXX_USE_OLD_GENERATE_CANONICAL]: Use static_assert
	instead of type-constraint on template parameter.
	* testsuite/26_numerics/random/pr60037-neg.cc: Updated line
	of error.

2025-12-17  Tomasz Kamiński  <tkaminsk@redhat.com>

	* include/bits/random.tcc (generate_canonical): Update
	error message to match pre-existing one in random.h.
	* testsuite/26_numerics/random/pr60037-neg.cc: Updated
	line for error message.

2025-12-17  Jakub Jelinek  <jakub@redhat.com>

	* include/bits/random.tcc (std::generate_canonical): Use
	__extension__ before __generate_canonical_{pow2,any} calls with
	unsigned __int128 template arguments.

2025-12-17  Tomasz Kamiński  <tkaminsk@redhat.com>

	* include/bits/atomic_base.h
	(__atomic_ref_base<const _Tp>::__atomic_ref_base): Accept
	pointer instead of reference. Remove precondition check and
	mark as noexcept.
	(__atomic_ref_base<_Tp>::__atomic_ref_base): Accept pointer
	insted of reference, and mark as noexcept.
	* include/std/atomic (atomic_ref::atomic_ref(_Tp&)): Add
	precondition check and take address of argument.
	(atomic_ref::atomic_ref(_Tp&&)): Define as deleted.
	(atomic_ref::atomic_ref(atomic_ref<_Up>)): Define.
	* include/bits/shared_ptr_atomic.h (_Sp_atomic::_Atomic_count):
	Pass address to __atomic_ref constructor.
	* include/std/barrier (__tree_barrier_base::_M_arrive)
	(__tree_barrier::arrive): Pass address to __atomic_ref constructor.
	* testsuite/29_atomics/atomic_ref/ctor.cc: New test.

2025-12-16  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/type_traits (_Integer_kind): New enum type.
	(__is_integral_helper::_S_kind): New static data member in
	primary template and each explicit specialization.
	(__is_signed_integer, __is_unsigned_integer): Use _S_kind
	instead of O(n) disjunction with is_same.

2025-12-16  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/122907
	* include/bits/cpp_type_traits.h (__memcpyable_integer<bool>):
	Define as false.
	* testsuite/25_algorithms/copy/122907.cc: New test.

2025-12-16  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/lib/libstdc++.exp (dg-v3-runtest) Set default_std to
	20.

2025-12-16  Jonathan Wakely  <jwakely@redhat.com>

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

2025-12-16  Nathan Myers  <ncm@cantrip.org>

	PR libstdc++/119739
	* include/bits/random.tcc: Add generate_canonical impl for C++26.
	* testsuite/26_numerics/random/uniform_real_distribution/operators/64351.cc:
	Adapt test for both pre- and post- C++26.
	* testsuite/26_numerics/random/uniform_real_distribution/operators/gencanon.cc:
	Test for float and double from 32-bit RNG, including 1.0 do-over.

2025-12-16  Patrick Palka  <ppalka@redhat.com>

	PR libstdc++/113299
	* include/bits/deque.tcc (__copy_move_a1): Constrain with
	__is_any_random_access_iter instead of __is_random_access_iter.
	(__copy_move_backward_a1): Likewise.
	(__equal_aux1): Likewise.
	* include/bits/stl_algo.h (__search_n): Use
	__iter_concept_or_category instead of __iterator_category
	or iterator_traits::iterator_category.
	(find_end): Likewise.
	(__is_permutation): Likewise.
	(for_each_n): Likewise.
	(unique_copy): Likewise, for constant iterators.
	(sample): Likewise, for constant iterators.
	* include/bits/stl_algobase.h (__copy_move_a1): Adjust
	deque-based forward declaration accordingly.
	(__copy_move_backward_a1): Likewise.
	(__equal_aux1): Likewise.
	(__lexicographical_compare_impl): Use
	__iter_concept_or_category instead of __iterator_category or
	iterator_traits::iterator_category.
	(__equal4): Likewise.
	* include/bits/stl_iterator_base_funcs.h
	(__iter_concept_or_category): New.
	(__is_any_random_access_iter): New.
	(_GLIBCXX_ITER_MOVE): New.
	* include/bits/stl_uninitialized.h (uninitialized_copy_n):
	Use __iterator_concept_or_category instead of
	__iterator_category for the constant iterator __first.
	(__uninitialized_copy_n_pair): Likewise.
	* include/bits/version.def (algorithm_iterator_requirements):
	Define.
	* include/bits/version.h: Regenerate.
	* include/std/algorithm: Provide the FTM
	__cpp_lib_algorithm_iterator_requirements.
	* include/std/memory: Likewise.
	* include/std/numeric: Likewise.  Include
	<bits/stl_iterator_base_funcs.h>.
	(reduce): Use __is_any_random_access_iter instead of
	__is_random_access_iter.
	(transform_reduce): Likewise.
	(inclusive_scan): Use _GLIBCXX_ITER_MOVE instead of std::move.
	* testsuite/25_algorithms/find_end/c++20_iter.cc: New test.
	* testsuite/25_algorithms/sample/c++20_iter.cc: New test.
	* testsuite/25_algorithms/search_n/c++20_iter.cc: New test.
	* testsuite/25_algorithms/unique_copy/c++20_iter.cc: New test.
	* testsuite/26_numerics/inclusive_scan/c++20_iter.cc: New test.

2025-12-12  Luc Grosheintz  <luc.grosheintz@gmail.com>

	* include/std/mdspan (submdspan): Fix missing '::template'.

2025-12-11  Jakub Jelinek  <jakub@redhat.com>

	PR libstdc++/121114
	* include/bits/version.def: Implement C++26 P3378R2 - constexpr
	exception types.
	(constexpr_exceptions): Change value from 1 to 202502, remove
	no_stdname and TODO comments.
	* include/bits/version.h: Regenerate.
	* src/c++11/cow-stdexcept.cc (__cow_string(const char*)): New
	ctor.
	(__cow_string::c_str()): New method.
	* config/abi/pre/gnu.ver (GLIBCXX_3.4.35): Export 8 __cow_string
	symbols.
	* include/bits/new_except.h: New file.
	* include/bits/new_throw.h: New file.
	* include/bits/stdexcept_throw.h: New file.
	* include/bits/stdexcept_throwdef.h: New file.
	* include/bits/stdexcept_throwfwd.h: New file.
	* include/std/stdexcept: Include bits/stdexcept_except.h and move
	everything after <string> include except for std::range_error into
	include/bits/stdexcept_except.h.
	(std::range_error): If __cpp_lib_constexpr_exceptions >= 202502L
	make all cdtors and methods constexpr.
	* include/bits/stdexcept_except.h: New file.
	* include/std/optional (__glibcxx_want_constexpr_exceptions): Define
	before including bits/version.h.
	(bad_optional_access::what): Make constexpr for
	__cpp_lib_constexpr_exceptions >= 202502L.
	(__throw_bad_optional_access): Likewise.
	* include/std/expected (__glibcxx_want_constexpr_exceptions): Define
	before including bits/version.h.
	(bad_expected_access): Make cdtors and all methods constexpr for
	__cpp_lib_constexpr_exceptions >= 202502L.
	* include/std/format (__glibcxx_want_constexpr_exceptions): Define
	before including bits/version.h.
	(_GLIBCXX_CONSTEXPR_FORMAT_ERROR): Define and undef later.
	(format_error): Use _GLIBCXX_CONSTEXPR_FORMAT_ERROR on ctors.
	* include/std/variant (__glibcxx_want_constexpr_exceptions): Define
	before including bits/version.h.
	(_GLIBCXX_CONSTEXPR_BAD_VARIANT_ACCESS): Define and undef later.
	(bad_variant_access): Use it on ctors and what() method.
	(__throw_bad_variant_access): Use it here too.
	* testsuite/18_support/exception/version.cc: Adjust expected
	__cpp_lib_constexpr_exceptions value.
	* testsuite/19_diagnostics/runtime_error/constexpr.cc: New test.
	* testsuite/19_diagnostics/headers/stdexcept/version.cc: New test.
	* testsuite/19_diagnostics/logic_error/constexpr.cc: New test.
	* testsuite/20_util/expected/observers.cc (test_value_throw): Change
	return type to bool from void, return true at the end, add test
	to dereference what() first character.  Make it constexpr for
	__cpp_lib_constexpr_exceptions >= 202502L and add static_assert.
	* testsuite/20_util/expected/version.cc: Add tests for
	__cpp_lib_constexpr_exceptions value.
	* testsuite/20_util/variant/constexpr.cc: For
	__cpp_lib_constexpr_exceptions >= 202502L include <string>.
	(test_get): New function if __cpp_lib_constexpr_exceptions >= 202502L,
	assert calling it is true.
	* testsuite/20_util/variant/version.cc: Add tests for
	__cpp_lib_constexpr_exceptions value.
	* testsuite/20_util/optional/constexpr/observers/3.cc: Include
	testsuite_hooks.h.
	(eat, test01): New functions.  Assert test01() is true.
	* testsuite/20_util/optional/version.cc: Add tests for
	__cpp_lib_constexpr_exceptions value.
	* include/std/future: Add #include <bits/functexcept.h>.
	* include/std/shared_mutex: Include <bits/new_throw.h>.
	* include/std/flat_map: Include <bits/stdexcept_throw.h> instead of
	<bits/functexcept.h>.
	* include/std/syncstream: Remove <bits/functexcept.h> include.
	* include/std/flat_set: Likewise.
	* include/std/bitset: Include <bits/stdexcept_throw.h> instead of
	<bits/functexcept.h>.
	* include/std/string_view: Don't include <bits/functexcept.h>, include
	<bits/stdexcept_throw.h> early if __glibcxx_exc_in_string is not
	defined and include <bits/stdexcept_throw.h> at the end of
	the header again if __glibcxx_exc_in_string is 2 and C++26 constexpr
	exceptions are enabled.
	(__glibcxx_exc_in_string): Define if __glibcxx_exc_in_string wasn't
	defined before including <bits/stdexcept_throw.h>.
	* include/std/array: Include <bits/stdexcept_throw.h> instead of
	<bits/functexcept.h>.
	* include/std/inplace_vector: Likewise.
	* include/std/string: Include <bits/stdexcept_except.h> and
	<bits/stdexcept_throw.h> after bits/basic_string.tcc include if
	C++26 constexpr exceptions are enabled and include
	<bits/stdexcept_throw.h> instead of <bits/functexcept.h> early.
	(__glibcxx_exc_in_string): Define early to 1, undefine at the end.
	* include/std/deque: Include <bits/stdexcept_throw.h>.
	* include/bits/new_allocator.h: Include <bits/new_throw.h> instead
	of <bits/functexcept.h>.
	* include/bits/stl_algobase.h: Remove <bits/functexcept.h> include.
	* include/bits/stl_vector.h: Include <bits/stdexcept_throw.h> instead
	of <bits/functexcept.h>.
	* include/bits/memory_resource.h: Include <bits/new_throw.h> instead
	of <bits/functexcept.h>.
	* include/bits/functexcept.h: Guard everything after includes with
	#if _GLIBCXX_HOSTED.
	(__throw_bad_alloc, __throw_bad_array_new_length,  __throw_logic_error,
	__throw_domain_error, __throw_invalid_argument, __throw_length_error,
	__throw_out_of_range, __throw_out_of_range_fmt, __throw_runtime_error,
	__throw_overflow_error, __throw_underflow_error): Move declarations to
	other headers - <bits/new_throw.h> and <bits/stdexcept_throwfwd.h>.
	* include/bits/stl_map.h: Include <bits/stdexcept_throw.h> instead
	of <bits/functexcept.h>.
	* include/bits/hashtable_policy.h: Include <bits/stdexcept_throw.h>
	instead of <bits/functexcept.h>.
	* include/bits/formatfwd.h (std::__throw_format_error): Remove
	declaration.
	* include/bits/specfun.h: Include <bits/stdexcept_throw.h> instead of
	<bits/functexcept.h>.
	* include/bits/basic_ios.h: Include <bits/functexcept.h>.
	* include/bits/locale_classes.h: Likewise.
	* include/tr1/cmath: Include <bits/stdexcept_throw.h> instead of
	<bits/functexcept.h>.
	* include/tr1/memory: Remove <bits/functexcept.h> include.
	* include/tr1/array: Include <bits/stdexcept_throw.h>.
	* include/ext/vstring_util.h: Include <bits/stdexcept_throw.h> instead
	of <bits/functexcept.h>.
	* include/ext/bitmap_allocator.h: Include <bits/new_throw.h> instead
	of <bits/functexcept.h>.
	* include/ext/mt_allocator.h: Likewise.
	* include/ext/malloc_allocator.h: Likewise.
	* include/ext/debug_allocator.h: Include <bits/stdexcept_throw.h>
	instead of <bits/functexcept.h>.
	* include/ext/concurrence.h: Include <bits/exception_defines.h>
	instead of <bits/functexcept.h>.
	* include/ext/throw_allocator.h: Include <bits/new_throw.h> and
	<bits/stdexcept_throw.h> instead of <bits/functexcept.h>.
	* include/ext/string_conversions.h: Include <bits/stdexcept_throw.h>
	instead of <bits/functexcept.h>.
	* include/ext/pool_allocator.h: Include <bits/new_throw.h> instead
	of <bits/functexcept.h>.
	* include/ext/ropeimpl.h: Include <bits/stdexcept_throw.h> instead of
	<bits/functexcept.h>.
	* include/tr2/dynamic_bitset: Likewise.
	* include/experimental/optional: Include <bits/exception_defines.h>
	instead of <bits/functexcept.h>.
	* include/Makefile.am (bits_freestanding): Add
	${bits_srcdir}/{new,stdexcept}_{except,throw}.h
	and ${bits_srcdir}/stdexcept_throw{fwd,def}.h.
	* include/Makefile.in: Regenerate.
	* src/c++17/floating_from_chars.cc: Remove <bits/functexcept.h>
	include.
	* src/c++11/regex.cc: Likewise.
	* src/c++11/functexcept.cc: Likewise.
	* src/c++11/snprintf_lite.cc: Include <bits/stdexcept_throw.h> instead
	of <bits/functexcept.h>.
	* src/c++11/thread.cc: Include <bits/functexcept.h>.
	* testsuite/util/testsuite_hooks.h: Include <bits/stdexcept_throw.h>
	instead of <bits/functexcept.h>.
	* testsuite/util/io/verified_cmd_line_input.cc: Include
	<bits/exception_defines.h> instead of <bits/functexcept.h>.
	* testsuite/20_util/allocator/105975.cc: Expect different diagnostics
	for C++26.
	* testsuite/23_containers/inplace_vector/access/capacity.cc: Remove
	#error, guard if consteval { return; } with
	#ifndef __cpp_lib_constexpr_exceptions.
	* testsuite/23_containers/inplace_vector/access/elem.cc: Likewise.
	* testsuite/23_containers/inplace_vector/cons/1.cc: Likewise.
	* testsuite/23_containers/inplace_vector/cons/from_range.cc: Likewise.
	* testsuite/23_containers/inplace_vector/modifiers/single_insert.cc:
	Likewise.
	* testsuite/23_containers/inplace_vector/modifiers/assign.cc:
	Likewise.
	* testsuite/23_containers/inplace_vector/modifiers/multi_insert.cc:
	Likewise.
	* libsupc++/new: Include <bits/new_except.h>.
	(std::bad_alloc, std::bad_array_new_length): Move defintion to
	<bits/new_except.h>.

2025-12-11  Jason Merrill  <jason@redhat.com>

	* testsuite/Makefile.am (CLEANFILES): Add gcm.cache.
	* testsuite/Makefile.in: Regenerate.
	* testsuite/lib/dg-options.exp (add_options_for_no_pch): Also add
	-fno-modules.
	* testsuite/lib/libstdc++.exp (v3_std_list): Handle "modules" std.
	(v3_modules_std): New global.
	(v3-build_support): Build gcms for bits/stdc++.h, std, and
	std.compat.

2025-12-11  Yuao Ma  <c8ef@outlook.com>

	* include/bits/version.def: Add FTM.
	* include/bits/version.h: Regenerate.
	* include/std/flat_set: Add constexpr.
	* testsuite/23_containers/flat_multiset/1.cc: Add constexpr test.
	* testsuite/23_containers/flat_set/1.cc: Add constexpr test.

2025-12-09  John Ericson  <git@johnericson.me>

	* acinclude.m4: Use GCC_AC_THREAD_MODEL instead, via AC_REQUIRE
	* configure: Regenerate.

2025-12-09  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/version.h: Regenerate.

2025-12-09  Luc Grosheintz  <luc.grosheintz@gmail.com>

	* include/bits/version.def (padded_layouts): Set to 202403.
	(submdspan): Set to 202411 add dependency.
	* include/bits/version.h: Regenerate.

2025-12-09  Luc Grosheintz  <luc.grosheintz@gmail.com>

	PR libstdc++/110352
	* include/std/mdspan
	(__mdspan::_SubMdspanMapping<_LayoutSide::__right, true>): Define.
	(layout_right_padded::submdspan_mapping): New friend function.
	* testsuite/23_containers/mdspan/submdspan/selections/right_padded.cc:
	Instantiate tests for layout_right_padded.
	* testsuite/23_containers/mdspan/submdspan/submdspan_mapping.cc:
	Ditto.

2025-12-09  Luc Grosheintz  <luc.grosheintz@gmail.com>

	PR libstdc++/110352
	* include/std/mdspan (__mdspan::__is_padded_mapping): Define.
	(__mdspan::_SubMdspanMapping): Add _Padded template parameter.
	(__mdspan::_SubMdspanMapping<_LayoutSide::__left, true>): Define.
	(__mdspan::__submdspan_mapping_impl): Updated _Trait alias.
	(layout_left_padded::submdspan_mapping): New friend method.
	* testsuite/23_containers/mdspan/layout_traits.h
	(LayoutTraits::layout_same_padded): New template type alias.
	* testsuite/23_containers/mdspan/submdspan/selections/left_padded.cc:
	Instantiate tests for layout_left_padded.
	* testsuite/23_containers/mdspan/submdspan/submdspan_mapping.cc:
	Ditto.

2025-12-09  Luc Grosheintz  <luc.grosheintz@gmail.com>

	PR libstdc++/110352
	* include/std/mdspan (layout_stride::mapping::submdspan_mapping): New
	friend function.
	* testsuite/23_containers/mdspan/submdspan/selections/stride.cc:
	Instantiate tests for layout_stride.
	* testsuite/23_containers/mdspan/submdspan/submdspan_neg.cc:
	Ditto.
	* testsuite/23_containers/mdspan/submdspan/submdspan_mapping.cc:
	Add tests for layout_stride.

2025-12-09  Luc Grosheintz  <luc.grosheintz@gmail.com>

	PR libstdc++/110352
	* include/std/mdspan
	(__mdspan::_SubMdspanMapping<_LayoutSide::__right>): Define.
	(layout_right::mapping::submdspan_mapping): New friend function.
	* testsuite/23_containers/mdspan/submdspan/selections/right.cc:
	Instantiate tests for layout_right.
	* testsuite/23_containers/mdspan/submdspan/submdspan_mapping.cc:
	Ditto.
	* testsuite/23_containers/mdspan/submdspan/submdspan_neg.cc:
	Ditto.

2025-12-09  Luc Grosheintz  <luc.grosheintz@gmail.com>

	PR libstdc++/110352
	* include/std/mdspan (__mdspan::__is_submdspan_mapping_result)
	(__mdspan::__submdspan_mapping_result, __mdspan::__fwd_prod)
	(__mdspan::__acceptable_slice_type, __mdspan::__slice_begin)
	(__mdspan::__suboffset, __mdspan::_LayoutSide, __mdspan::__mapping_side)
	(__mdspan::_StridesTrait, __mdspan::__substrides_generic)
	(__mdspan::__substrides_standardized, __mdspan::__substrides)
	(__mdspan::__is_unit_stride_slice, __mdspan::_SliceKind)
	(__mdspan::__make_slice_kind, __mdspan::__make_slice_kind_array)
	(__mdspan::__is_block, __mdspan::__padded_block_begin_generic)
	(__mdspan::__padded_block_begin, __mpdspan::_SubMdspanMapping)
	(__mdspan::__submdspan_mapping_impl): Define.
	(__mdspan::__dynamic_slice_extent, __mdspan::__static_slice_extent)
	(__mdspan::__subextents): Move earlier in the file.
	(layout_left::mapping::submdspan_mapping, __mdspan::__sliceable_mapping)
	(__mdspan::__submapping, submdspan): Define.
	* src/c++23/std.cc.in: Add submdspan.
	* testsuite/23_containers/mdspan/submdspan/generic.cc: New test.
	* testsuite/23_containers/mdspan/submdspan/selections/left.cc:
	Instantiate selection tests for layout_left.
	* testsuite/23_containers/mdspan/submdspan/selections/testcases.h: Generic
	tests different selections.
	* testsuite/23_containers/mdspan/submdspan/submdspan_mapping.cc: New test.
	* testsuite/23_containers/mdspan/submdspan/submdspan_neg.cc: New test.

2025-12-09  Luc Grosheintz  <luc.grosheintz@gmail.com>

	* include/std/mdspan (_ExtentsStorage::_M_dynamic_extents):
	Create span from pointer + size, not begin and end iterators.

2025-12-08  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/122946
	* include/bits/version.def (concepts): Set value to 202207.
	* include/bits/version.h: Regenerate.
	* include/std/concepts (__comparison_common_type_with_impl)
	(__comparison_common_type_with): New helper concepts.
	(equality_comparable_with): Use __comparison_common_type_with.
	* libsupc++/compare (three_way_comparable_with): Likewise.
	(__glibcxx_want_concepts): Define to get __cpp_lib_concepts
	here.
	* testsuite/std/concepts/concepts.compare/move_only.cc: New
	test.

2025-12-08  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/intcmp.h: Replace all uses of
	__is_standard_integer with __is_signed_or_unsigned_integer.
	* include/bits/max_size_type.h: Fix outdated comment.
	* include/bits/sat_arith.h: Replace all uses of
	__is_standard_integer with __is_signed_or_unsigned_integer.
	* include/c_compatibility/stdckdint.h: Replace all uses of the
	__cv_unqual_signed_or_unsigned_integer_type concept with
	__is_signed_or_unsigned_integer.
	(__cv_unqual_signed_or_unsigned_integer_type): Remove.
	* include/ext/numeric_traits.h: Fix outdated comment.
	* include/std/charconv (from_chars): Replace use of
	__is_standard_integer with __is_signed_or_unsigned_integer.
	Do not enable for cv-qualified char.
	* include/std/mdspan: Likewise.
	* include/std/type_traits (__is_unsigned_integer): Include
	unsigned __int128 in type list.
	(__is_signed_integer): Include signed __int128 in type list.
	(__is_standard_integer): Rename to ...
	(__is_signed_or_unsigned_integer): ... this.
	* testsuite/23_containers/mdspan/extents/ctor_ints.cc: Test
	with 128-bit integers.
	* testsuite/23_containers/mdspan/submdspan/strided_slice.cc:
	Likewise.
	* testsuite/20_util/integer_comparisons/extended.cc: New test.
	* testsuite/26_numerics/saturation/extended.cc: New test.
	* testsuite/26_numerics/stdckdint/extended.cc: New test.

2025-12-08  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/112591
	* include/std/variant (_Variadic_union): Separate specializations for
	for union of only trivially destructible types (true as first template
	argument). Unconditionally define destructor for _Variadic_union<false,
	_First, _Rest...>.
	* testsuite/20_util/variant/87619.cc: Add limit for the template depth.
	* testsuite/20_util/variant/112591.cc: New test.

2025-12-08  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/iterator_concepts.h: Remove diagnostic pragmas.

2025-12-08  Jonathan Wakely  <jwakely@redhat.com>

	* include/Makefile.am: Add new header.
	* include/Makefile.in: Regenerate.
	* include/std/latch: Include <bits/intcmp.h> instead of
	<utility>.
	* include/std/utility: Include <bits/intcmp.h>.
	(cmp_equal, cmp_not_equal, cmp_less, cmp_greater)
	(cmp_less_equal, cmp_greater_equal, in_range): Move to ...
	* include/bits/intcmp.h: New file.

2025-12-06  Jason Merrill  <jason@redhat.com>

	* src/c++23/std.cc.in: Add more #if.

2025-12-06  Patrick Palka  <ppalka@redhat.com>

	PR libstdc++/80564
	* include/std/functional (__cv_like): New.
	(_Bind::_Res_type): Don't define when not needed.
	(_Bind::__dependent): Likewise.
	(_Bind::_Res_type_cv): Likewise.
	(_Bind::operator()) [_GLIBCXX_EXPLICIT_THIS_PARAMETER]:
	Define as two instead of four overloads using deducing
	this.
	* testsuite/20_util/bind/cv_quals_2.cc: Ignore SFINAE
	diagnostics inside headers.
	* testsuite/20_util/bind/ref_neg.cc: Likewise.
	* testsuite/20_util/bind/80564.cc: New test.

2025-12-06  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/atomic_wait.h (__detail::__atomic_eq): Use
	std::addressof instead of &.
	* include/std/atomic (atomic::wait, atomic::notify_one)
	(atomic::notify_all): Likewise.

2025-12-05  Patrick Palka  <ppalka@redhat.com>
	    Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/120446
	* include/bits/refwrap.h (__detail::__is_ref_wrapper):
	Define as per P2655R3 for C++20.
	(__detail::__ref_wrap_common_reference_exists_with): Likewise.
	(basic_common_reference): Define partial specializations using
	the above as per P2655R3 for C++20.
	* include/bits/version.def (common_reference_wrapper): New.
	* include/bits/version.h: Regenerate.
	* include/std/functional (__glibcxx_want_common_reference_wrapper):
	Define.
	* testsuite/20_util/reference_wrapper/p2655r3.cc: New test.

2025-12-05  Patrick Palka  <ppalka@redhat.com>

	PR libstdc++/120446
	* include/bits/version.def (common_reference): New.
	* include/bits/version.h: Regenerate.
	* include/std/type_traits (__glibcxx_want_common_reference):
	Define.
	(__common_reference_impl<T1, T2, 1>): Add pointer convertibility
	constraints as per P2655R3.
	* testsuite/20_util/common_reference/p2655r3.cc: New test.

2025-12-05  Patrick Palka  <ppalka@redhat.com>

	PR c++/120446
	* include/std/type_traits (__common_reference_impl): Rewrite
	partial specializations to use requires-clause instead of
	an additional void_t template parameter.  Consolidate the
	partial specializations corresponding to bullet 1.

2025-12-05  Patrick Palka  <ppalka@redhat.com>

	* testsuite/20_util/function_objects/bind_front/111327.cc:
	Add missing space before } ending a dg-error directive.

2025-12-05  Patrick Palka  <ppalka@redhat.com>

	PR libstdc++/111550
	* include/std/ranges (views::__adaptor::_Partial::operator())
	[_GLIBCXX_EXPLICIT_THIS_PARAMETER]: Also use deducing this
	in C++20 mode when possible.
	(views::__adaptor::_Pipe::Operator())
	[_GLIBCXX_EXPLICIT_THIS_PARAMETER]: Likewise.
	* testsuite/std/ranges/adaptors/take.cc (test07): New test.

2025-12-05  Patrick Palka  <ppalka@redhat.com>

	PR libstdc++/111327
	* include/bits/binders.h (_Binder::operator())
	[_GLIBCXX_EXPLICIT_THIS_PARAMETER]: Also use deducing this in
	C++20 mode when possible.
	* testsuite/20_util/function_objects/bind_front/111327.cc:
	Expect error inside header even in C++20 mode.

2025-12-05  Patrick Palka  <ppalka@redhat.com>

	PR libstdc++/111327
	* include/std/functional (_Not_fn::operator())
	[_GLIBCXX_EXPLICIT_THIS_PARAMETER]: Define as a single
	overload using deducing this.
	* testsuite/20_util/function_objects/not_fn/111327.cc: Extend test.

2025-12-05  Patrick Palka  <ppalka@redhat.com>

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

2025-12-04  François Dumont  <frs.dumont@gmail.com>

	* include/debug/deque
	(std::erase_if<>(std::__debug::deque<>&, _Pred)): New.
	(std::erase<>(std::__debug::deque<>&, const _Up&)): New.
	* include/std/deque (std::erase_if(std::deque<>&, _Pred)): Remove
	_GLIBCXX_DEBUG code.
	* testsuite/23_containers/deque/debug/erase.cc: New test case.
	* testsuite/23_containers/deque/debug/invalidation/erase.cc: New test case.

2025-12-04  Tomasz Kamiński  <tkaminsk@redhat.com>

	* include/debug/safe_unordered_base.h
	(_Safe_unordered_container_base::operator=): Define as
	defaulted, inherit behavior of _Safe_sequence_base.

2025-12-04  Luc Grosheintz  <luc.grosheintz@gmail.com>
	    Tomasz Kamiński  <tkaminsk@redhat.com>

	* include/std/mdspan (layout_left): Apply LWG4272.
	(layout_right, layout_left_padded, layout_right_padded): Ditto.
	* testsuite/23_containers/mdspan/layouts/ctors.cc: Add
	test to check ctor uniformity at rank == 0. Update test
	for new behavior.
	* testsuite/23_containers/mdspan/layouts/padded.cc: Update test
	for new behavior.

2025-12-04  Tomasz Kamiński  <tkaminsk@redhat.com>

	* include/debug/safe_sequence.h
	(_Safe_node_sequence::_Safe_node_sequence): Define as defaulted.

2025-12-03  Vladimir Bespalov  <vlad.bespalov@jetstreamsoft.com>

	PR libstdc++/122812
	* python/libstdcxx/v6/printers.py (lookup_templ_spec): Use
	gdb.Type.tag if present.

2025-12-03  Yuao Ma  <c8ef@outlook.com>

	* include/bits/basic_string.h: Add subview.
	* include/bits/cow_string.h: Add subview.
	* include/std/string: Add FTM.
	* testsuite/21_strings/basic_string/operations/subview/char.cc: New test.
	* testsuite/21_strings/basic_string/operations/subview/wchar_t.cc: New test.

2025-12-03  Yuao Ma  <c8ef@outlook.com>

	* include/bits/version.def: Add string_subview FTM.
	* include/bits/version.h: Regenerate.
	* include/std/string_view: Add subview.
	* testsuite/21_strings/basic_string_view/operations/subview/char.cc: New test.
	* testsuite/21_strings/basic_string_view/operations/subview/wchar_t.cc: New test.

2025-12-03  François Dumont  <frs.dumont@gmail.com>

	* include/Makefile.am (debug_headers): Add inplace_vector.
	* include/Makefile.in: Regenerate.
	* include/debug/functions.h (__check_valid_range): Add C++20 constexpr.
	* include/debug/helper_functions.h (__valid_range): Likewise.
	* include/debug/inplace_vector: New.
	* include/debug/safe_base.h (~_Safe_sequence_base()): Add C++11 noexcept.
	(_Safe_sequence_base::operator=(const _Safe_sequence_base&)): New.
	(_Safe_sequence_base::operator=(_Safe_sequence_base&&)): New.
	(_Safe_sequence_base::_M_invalidate_all): Add C++20 constexpr.
	* include/debug/safe_container.h
	(_Safe_container<>::operator=(const _Safe_container<>&)): Implement using
	_Safe_sequence_base same operator.
	* include/debug/safe_iterator.h (__valid_range): Add C++20 constexpr.
	* include/debug/safe_sequence.h
	(_Not_equal_to(const _Type&)): Add C++20 constexpr.
	(_Equal_to(const _Type&)): Add C++20 constexpr.
	(_After_nth_from(const difference_type&, const _Iterator&)): Add C++20 constexpr.
	(_Safe_sequence<>::_M_invalidate_if): Add C++20 constexpr.
	(_Safe_node_sequence::operator=(const _Safe_node_sequence&)): New.
	(_Safe_node_sequence::operator=(_Safe_node_sequence&&)): New.
	(_Safe_node_sequence<>::_M_invalidate_all()): Add C++20 constexpr.
	* include/debug/safe_sequence.tcc
	(_Safe_sequence<>::_M_invalidate_if): Add C++20 constexpr.
	* include/std/inplace_vector [_GLIBCXX_DEBUG](std::inplace_vector<>): Move
	implementation into __cxx1998 namespace.
	(erase, erase_if): Limit to non-debug inplace_vector<>, cleanup code.
	[_GLIBCXX_DEBUG]: Add include <debug/inplace_vector>.
	* testsuite/23_containers/inplace_vector/cons/1.cc: Adapt, skip several
	is_trivially_xxx checks when in _GLIBCXX_DEBUG mode.
	* testsuite/23_containers/inplace_vector/copy.cc: Likewise.
	* testsuite/23_containers/inplace_vector/move.cc: Likewise.
	* testsuite/23_containers/inplace_vector/debug/assign1_neg.cc: New test case.
	* testsuite/23_containers/inplace_vector/debug/assign2_neg.cc: New test case.
	* testsuite/23_containers/inplace_vector/debug/assign3_neg.cc: New test case.
	* testsuite/23_containers/inplace_vector/debug/assign4_backtrace_neg.cc: New test case.
	* testsuite/23_containers/inplace_vector/debug/assign4_neg.cc: New test case.
	* testsuite/23_containers/inplace_vector/debug/construct1_neg.cc: New test case.
	* testsuite/23_containers/inplace_vector/debug/construct2_neg.cc: New test case.
	* testsuite/23_containers/inplace_vector/debug/construct3_neg.cc: New test case.
	* testsuite/23_containers/inplace_vector/debug/construct4_neg.cc: New test case.
	* testsuite/23_containers/inplace_vector/debug/debug_functions.cc: New test case.
	* testsuite/23_containers/inplace_vector/debug/erase.cc: New test case.
	* testsuite/23_containers/inplace_vector/debug/insert1_neg.cc: New test case.
	* testsuite/23_containers/inplace_vector/debug/insert2_neg.cc: New test case.
	* testsuite/23_containers/inplace_vector/debug/insert3_neg.cc: New test case.
	* testsuite/23_containers/inplace_vector/debug/insert4_neg.cc: New test case.
	* testsuite/23_containers/inplace_vector/debug/insert5_neg.cc: New test case.
	* testsuite/23_containers/inplace_vector/debug/insert7_neg.cc: New test case.
	* testsuite/23_containers/inplace_vector/debug/invalidation/1.cc: New test case.
	* testsuite/23_containers/inplace_vector/debug/invalidation/2.cc: New test case.
	* testsuite/23_containers/inplace_vector/debug/invalidation/3.cc: New test case.
	* testsuite/23_containers/inplace_vector/debug/invalidation/4.cc: New test case.
	* testsuite/23_containers/inplace_vector/debug/invalidation/append_range.cc:
	New test case.
	* testsuite/23_containers/inplace_vector/debug/invalidation/erase.cc:
	New test case.
	* testsuite/23_containers/inplace_vector/debug/invalidation/pop_back.cc:
	New test case.
	* testsuite/23_containers/inplace_vector/debug/invalidation/push_back.cc:
	New test case.
	* testsuite/23_containers/inplace_vector/debug/invalidation/swap.cc:
	New test case.
	* testsuite/23_containers/inplace_vector/debug/invalidation/try_append_range.cc:
	New test case.
	* testsuite/23_containers/inplace_vector/debug/invalidation/try_emplace_back.cc:
	New test case.
	* testsuite/23_containers/inplace_vector/debug/invalidation/try_push_back.cc:
	New test case.
	* testsuite/23_containers/inplace_vector/debug/invalidation/unchecked_emplace_back.cc:
	New test case.
	* testsuite/util/debug/checks.h: Avoid using _GLIBCXX_DEBUG containers in test
	implementations.

2025-12-02  Luc Grosheintz  <luc.grosheintz@gmail.com>

	PR libstdc++/110352
	* include/std/mdspan (submdspan_extents): New function.
	* src/c++23/std.cc.in: Add submdspan_extents.
	* testsuite/23_containers/mdspan/int_like.h: Add StructuralInt.
	* testsuite/23_containers/mdspan/submdspan/submdspan_extents.cc: New test.
	* testsuite/23_containers/mdspan/submdspan/submdspan_extents_neg.cc: New test.

2025-12-02  Luc Grosheintz  <luc.grosheintz@gmail.com>

	PR libstdc++/110352
	* include/std/mdspan (submdspan_canonicalize_slices): New
	function.
	* src/c++23/std.cc.in (submdspan_canonicalize_slices): Add.
	* testsuite/23_containers/mdspan/submdspan/submdspan_canonicalize_slices.cc: New test.
	* testsuite/23_containers/mdspan/submdspan/submdspan_canonicalize_slices_neg.cc: New test.

2025-12-01  Patrick Palka  <ppalka@redhat.com>

	PR libstdc++/122921
	* include/std/flat_map (_Flat_map_impl::_Iterator::value_type):
	Remove const from key_type to make consistent with the
	container's value_type.
	* testsuite/23_containers/flat_map/1.cc (test09): New test.
	* testsuite/23_containers/flat_multimap/1.cc (test09): New test.

2025-12-01  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/atomic_timed_wait.h (__wait_until_impl): Use
	chrono::nanoseconds for parameter.
	* src/c++20/atomic.cc (__wait_until_impl): Likewise.

2025-12-01  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/122878
	* src/c++20/atomic.cc (__spin_until_impl): Remove.
	(__wait_until_impl): Use __spin_impl instead of
	__spin_until_impl and return if timeout is reached after
	spinning.

2025-12-01  Jonathan Wakely  <jwakely@redhat.com>

	* src/c++20/atomic.cc: Document platform wait API.
	(__futex_wait_flags): Remove enumeration type.
	(futex_private_flag): Define constant for FUTEX_PRIVATE_FLAG.
	(__platform_wait): Use local variables for futex op constants.
	(__platform_notify): Likewise.
	(__platform_wait_until): Likewise. Adjust parameter types for
	consistency with __platform_wait.

2025-11-28  Patrick Palka  <ppalka@redhat.com>

	PR libstdc++/122842
	* include/bits/ranges_base.h (__access:_CBegin): Define in
	terms of const_iterator directly, not const_iterator_t.
	(__access::_CEnd): Likewise in terms of const_sentinel vs
	const_sentinel_t.
	(const_iterator_t): Move down definition and define in terms
	of ranges::cbegin as per LWG 3946.
	(const_sentinel_t): Likewise in terms of ranges::cend.
	* testsuite/24_iterators/const_iterator/1.cc (test02): Correct
	test for int[], std::array and std::vector.  Also test
	std::string.

2025-11-27  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/performance/23_containers/sort_search/list.cc: Cast
	results to void to suppress -Wunused-result warnings from
	nodiscard functions.
	* testsuite/performance/25_algorithms/equal_deque_iterators.cc:
	Likewise.
	* testsuite/performance/25_algorithms/search_n.cc: Likewise.

2025-11-27  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/Makefile.am: Fix typo in comment.
	* testsuite/Makefile.in: Regenerate.

2025-11-27  Tomasz Kamiński  <tkaminsk@redhat.com>

	* include/std/ranges (__func_handle::__select): Named function
	extracted from local lambda.
	(__detail::__func_handle_t): Define using __func_handle::__select.
	(__func_handle::_Inplace): Raname _M_ptr to _M_fn.

2025-11-27  Jonathan Wakely  <jwakely@redhat.com>

	* config/abi/pre/gnu.ver: Adjust exports.
	* include/bits/atomic_timed_wait.h (_GLIBCXX_HAVE_PLATFORM_TIMED_WAIT):
	Do not define this macro.
	(__atomic_wait_address_until_v, __atomic_wait_address_for_v):
	Adjust assertions to check that __platform_wait_uses_type is
	true.
	* include/bits/atomic_wait.h (__waitable): New concept.
	(__platform_wait_uses_type): Different separately for platforms
	with and without platform wait.
	(_GLIBCXX_HAVE_PLATFORM_WAIT): Do not define this macro.
	(__wait_value_type): New typedef.
	(__wait_result_type): Change _M_val to __wait_value_type.
	(__wait_flags): Remove __proxy_wait enumerator. Reduce range
	reserved for ABI version by the commented-out value.
	(__wait_args_base::_M_old): Change type to __wait_args_base.
	(__wait_args_base::_M_obj, __wait_args_base::_M_obj_size): New
	data members.
	(__wait_args::__wait_args): Set _M_obj and _M_obj_size on
	construction.
	(__wait_args::_M_setup_wait): Change void* parameter to deduced
	type. Adjust bit_cast to work for types of different sizes.
	(__wait_args::_M_load_proxy_wait_val): Remove function, replace
	with ...
	(__wait_args::_M_setup_proxy_wait): New function.
	(__wait_args::_S_flags_for): Do not set __proxy_wait flag.
	(__atomic_wait_address_v): Adjust assertion to check that
	__platform_wait_uses_type is true.
	* src/c++20/atomic.cc (_GLIBCXX_HAVE_PLATFORM_WAIT): Define here
	instead of in header. Check _GLIBCXX_HAVE_PLATFORM_WAIT instead
	of _GLIBCXX_HAVE_PLATFORM_TIMED_WAIT.
	(__platform_wait, __platform_notify, __platform_wait_until): Add
	unused parameter for _M_obj_size.
	(__spin_impl): Adjust for 64-bit __wait_args_base::_M_old.
	(use_proxy_wait): New function.
	(__wait_args::_M_load_proxy_wait_val): Replace with ...
	(__wait_args::_M_setup_proxy_wait): New function. Call
	use_proxy_wait to decide at runtime whether to wait on the
	pointer directly instead of using a proxy. If a proxy is needed,
	set _M_obj and _M_obj_size to refer to its _M_ver member. Adjust
	for change to type of _M_old.
	(__wait_impl): Wait on _M_obj unconditionally. Pass _M_obj_size
	to __platform_wait.
	(__notify_impl): Call use_proxy_wait to decide whether to notify
	on the address parameter or a proxy
	(__spin_until_impl): Adjust for change to type of _M_val.
	(__wait_until_impl): Wait on _M_obj unconditionally. Pass
	_M_obj_size to __platform_wait_until.

2025-11-27  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/semaphore_base.h (__platform_semaphore::_S_max):
	Limit to PTRDIFF_MAX to avoid negative values.
	* testsuite/30_threads/semaphore/least_max_value.cc: New test.

2025-11-26  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/122864
	* include/std/chrono (chrono::__pack_ints): Replace `<=`
	with `<<`.

2025-11-26  Tomasz Kamiński  <tkaminsk@redhat.com>

	* include/std/ranges (__detail::__is_std_op_template)
	(__detail::__is_std_op_wrapper, __func_handle::_Inplace)
	(__func_handle::_InplaceMemPtr, __func_handle::_ViaPointer)
	(__func_handle::_StaticCall, __detail::__func_handle_t): Define.
	(transform_view::_Iterator, zip_transform_view::_Iterator)
	(adjacent_tranform_view::_Iterator): Replace pointer to view
	(_M_parent) with pointer to functor (_M_fun). Update constructors
	to construct _M_fun from *__parent->_M_fun. Define operator* and
	operator[] in terms of _M_call_deref and _M_call_subscript.
	* testsuite/std/ranges/adaptors/adjacent_transform/1.cc: New tests.
	* testsuite/std/ranges/adaptors/transform.cc: New tests.
	* testsuite/std/ranges/zip_transform/1.cc: New tests.

2025-11-26  Tomasz Kamiński  <tkaminsk@redhat.com>

	* include/bits/ranges_cmp.h (std::identity::operator()):
	(ranges::equal_to:operator(), ranges::not_equal_to:operator())
	(ranges::greater::operator(), ranges::greater_equal::operator())
	(ranges::less::operator(), ranges::less_equal::operator()):
	Declare as static.
	* libsupc++/compare (std::compare_three_way::operator()):
	Declare as static.

2025-11-26  Tomasz Kamiński  <tkaminsk@redhat.com>

	* include/std/chrono (chrono::__hash): Rename __packed to
	__res.

2025-11-26  Tomasz Kamiński  <tkaminsk@redhat.com>
	    Giuseppe D'Angelo  <giuseppe.dangelo@kdab.com>

	PR libstdc++/110357
	* include/bits/version.def (chrono, chrono_cxx20): Bump values.
	* include/bits/version.h: Regenerate.
	* include/std/chrono (__is_nothrow_copy_hashable)
	(chrono::__pack_ints, chrono::__as_int, chrono::__int_hash)
	(chrono::__hash): Define.
	(std::hash): Define partial specialization for duration, time_point,
	and zoned_time, and full specializations for calendar types and
	leap_second.
	(std::__is_fast_hash): Define partial specializations for duration,
	time_point, zoned_time.
	* testsuite/std/time/hash.cc: New test.

2025-11-25  Jonathan Wakely  <jwakely@redhat.com>

	* acinclude.m4 (libtool_VERSION): Bump version.
	* configure: Regenerate.

2025-11-24  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/optional (operator==, operator!=, operator>)
	(operator>, operator<=, operator>=): Do not use logical
	&& and || with operands of unknown types.
	* testsuite/20_util/optional/relops/lwg4370.cc: New test.

2025-11-24  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/expected (operator==): Use implicit conversion to
	bool and do not use logical && and || with operands of unknown
	types. Add nodiscard attributes.
	* testsuite/20_util/expected/equality.cc: Test some missing
	cases which were not covered previously.
	* testsuite/20_util/expected/lwg4366.cc: New test.

2025-11-24  Jonathan Wakely  <jwakely@redhat.com>

	* python/libstdcxx/v6/xmethods.py (ListMethodsMatcher.match):
	Fix lookup for node type.

2025-11-24  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/122821
	* python/libstdcxx/v6/xmethods.py (_versioned_namespace): Remove
	global variable.
	(is_specialization_of): Do not use _versioned_namespace. Add
	__debug:: to regex.

2025-11-24  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/istream (istream::ignore(streamsize, char)): Add
	always_inline attribute.

2025-11-21  Yuao Ma  <c8ef@outlook.com>

	* doc/html/manual/using_exceptions.html: Replace dead link.
	* doc/xml/manual/using_exceptions.xml: Likewise.

2025-11-21  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/expected (expected::value_or): Use remove_cv_t for
	the return type. Do not use static_cast for return statement.
	Adjust static_assert conditions to match return statements.
	* include/std/optional (optional::value_or): Likewise.
	(optional<T&>::value_or): Likewise.

2025-11-21  Yuao Ma  <c8ef@outlook.com>
	    Jonathan Wakely  <jwakely@redhat.com>

	* include/std/istream (ignore): Add an overload for char.
	* testsuite/27_io/basic_istream/ignore/char/93672.cc: Adjust
	expected behaviour for C++26 mode.
	* testsuite/27_io/basic_istream/ignore/char/4.cc: New test.

2025-11-21  Jonathan Wakely  <jwakely@redhat.com>

	* doc/xml/faq.xml: Refresh information on _GNU_SOURCE and
	_XOPEN_SOURCE being predefined.
	* doc/xml/manual/internals.xml: Remove outdated paragraph about
	_POSIX_SOURCE in libstdc++ source files.
	* doc/html/*: Regenerate.

2025-11-21  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/regex_automaton.tcc [_GLIBCXX_DEBUG]: Include
	<ostream> so that _State_base::_M_print etc. can use it.

2025-11-21  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/23_containers/vector/debug/erase.cc: Remove no_pch
	option.
	* testsuite/23_containers/vector/debug/invalidation/erase.cc:
	Likewise.

2025-11-20  François Dumont  <frs.dumont@gmail.com>

	* include/debug/vector (std::erase_if, std::erase): New overloads for
	std::__debug::vector instances.
	* include/std/vector (std::erase_if, std::erase): Make overloads specific
	to normal std::vector implementation.
	* testsuite/23_containers/vector/debug/erase.cc: New test case.
	* testsuite/23_containers/vector/debug/invalidation/erase.cc: New test case.

2025-11-20  Luc Grosheintz  <luc.grosheintz@gmail.com>

	* include/std/mdspan: Improve formatting and placement.
	* testsuite/23_containers/mdspan/int_like.h: Optionally,
	add move- and copy-ctors.
	* testsuite/23_containers/mdspan/layouts/padded_traits.h: Move to...
	* testsuite/23_containers/mdspan/layout_traits.h: ...here.
	* testsuite/23_containers/mdspan/layouts/ctors.cc: Fix include.
	* testsuite/23_containers/mdspan/layouts/mapping.cc: Ditto.
	* testsuite/23_containers/mdspan/layouts/padded.cc: Ditto.
	* testsuite/23_containers/mdspan/layouts/padded_neg.cc: Ditto.

2025-11-20  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/18_support/headers/new/synopsis.cc: Add constexpr to
	placement delete for C++26 and up.

2025-11-19  Jonathan Wakely  <jwakely@redhat.com>

	* doc/xml/manual/abi.xml: Add versions for GCC 16.
	* doc/html/manual/abi.html: Regenerate.

2025-11-19  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/122743
	* doc/xml/manual/abi.xml: Add versions for GCC 15.
	* doc/html/manual/abi.html: Regenerate.

2025-11-19  Jonathan Wakely  <jwakely@redhat.com>

	* doc/xml/faq.xml: Remove unwanted whitespace inside
	programlisting elements.
	* doc/xml/manual/allocator.xml: Likewise.
	* doc/xml/manual/auto_ptr.xml: Likewise.
	* doc/xml/manual/backwards_compatibility.xml: Likewise.
	* doc/xml/manual/build_hacking.xml: Likewise.
	* doc/xml/manual/containers.xml: Likewise.
	* doc/xml/manual/diagnostics.xml: Likewise.
	* doc/xml/manual/extensions.xml: Likewise.
	* doc/xml/manual/intro.xml: Likewise.
	* doc/xml/manual/io.xml: Likewise.
	* doc/xml/manual/iterators.xml: Likewise.
	* doc/xml/manual/numerics.xml: Likewise.
	* doc/xml/manual/policy_data_structures.xml: Likewise.
	* doc/xml/manual/strings.xml: Likewise.
	* doc/xml/manual/support.xml: Likewise.
	* doc/xml/manual/test.xml: Likewise.
	* doc/xml/manual/using.xml: Likewise.
	* doc/xml/manual/utilities.xml: Likewise.
	* doc/html/*: Regenerate.

2025-11-19  Andrew Pinski  <andrew.pinski@oss.qualcomm.com>

	* include/bits/basic_string.h (basic_string::M_set_length): Swap
	around the order of traits_type::assign and _M_length so that
	_M_length is at the end.

2025-11-19  Martin Liska  <martin.liska@hey.com>

	* configure: Regenerate.

2025-11-19  Martin Liska  <martin.liska@hey.com>

	* acinclude.m4:: Add detection for wild linker.
	* configure: Regenerate.

2025-11-19  Luc Grosheintz  <luc.grosheintz@gmail.com>

	* include/std/mdspan (extents::_Storage): Move type alias before
	its first use.
	(__mdspan::__static_extents): Add missing noexcept and constexpr
	to friend declaration in extents.
	(__mdspan::__dynamic_extents): Ditto.

2025-11-19  Jakub Jelinek  <jakub@redhat.com>

	* include/std/type_traits (constant_wrapper conversion operator):
	Use decltype(value) instead of decltype(auto).  Resolves LWG4468.

2025-11-19  Jakub Jelinek  <jakub@redhat.com>

	PR libstdc++/122671
	* libsupc++/new (::operator delete, ::operator delete[]): Implement
	proposed LWG4477 resolution.  Use _GLIBCXX_PLACEMENT_CONSTEXPR for
	placement operator deletes.

2025-11-18  Mike Crowe  <mac@mcrowe.com>

	* include/std/shared_mutex (try_lock, try_lock_until)
	(try_lock_shared_until): Respond consistently to errors and
	deadlocks.
	* testsuite/30_threads/shared_timed_mutex/try_lock_until/116586.cc:
	Test deadlock behaviour if possible.

2025-11-18  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/121858
	* include/bits/funcref_impl.h
	(function_ref::function_ref(nontype<__fn>, _Up&&)): Handle.
	reference_wrapper.
	* testsuite/20_util/function_ref/call.cc: Call and update
	test05(). Add new test06() for reference_wrapper.

2025-11-17  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/122726
	* src/filesystem/ops-common.h [_GLIBCXX_FILESYSTEM_IS_WINDOWS]
	(rename): Use __last_system_error to set errno accurately.
	* testsuite/27_io/filesystem/operations/rename.cc: Test
	error_code matches errc::no_such_file_or_directory.

2025-11-17  Jonathan Wakely  <jwakely@redhat.com>

	* src/c++23/std.cc.in [!__cpp_lib_syncbuf]: Disable exports for
	<syncstream> contents when not defined.
	[!_GLIBCXX_USE_CXX11_ABI]: Disable exports for pmr aliases in
	<string> when not defined.

2025-11-17  Jason Merrill  <jason@redhat.com>

	* testsuite/util/testsuite_allocator.h: Move importable headers up.
	* testsuite/util/testsuite_common_types.h: Likewise.
	* testsuite/util/testsuite_containers.h: Likewise.
	* testsuite/util/testsuite_error.h: Move includes inside
	include guard.
	* testsuite/util/testsuite_greedy_ops.h: #include <cstddef>.
	* testsuite/util/testsuite_iterators.h: #include <utility>.
	* testsuite/util/testsuite_new_operators.h: #include <cstdlib>.
	* testsuite/util/testsuite_random.h: #include <random>.

2025-11-16  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/122698
	* src/c++20/syncbuf.cc (__syncbuf_get_mutex): Include <mutex>.
	Fix indentation of function body.

2025-11-16  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>

	* scripts/extract_symvers.pl: Remove ccs from elfdump path.

2025-11-15  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/atomic_base.h: Tweak grammar of static assert
	messages for unsupported atomic wait on volatile.

2025-11-15  Jonathan Wakely  <jwakely@redhat.com>

	* src/c++20/atomic.cc (__wait_impl): Fix outdated comment.
	(__wait_until_impl): Simplify return statements.

2025-11-14  Tom Tromey  <tromey@adacore.com>

	* python/libstdcxx/v6/printers.py (StdVectorPrinter._bounds):
	New method.
	(StdVectorPrinter.to_string): Use it.
	(StdVectorPrinter.num_children): New method.
	(StdStackOrQueuePrinter.num_children): New method.
	(StdMapPrinter.num_children): New method.
	(StdSetPrinter.num_children): New method.
	(StdDequePrinter._size): New method.
	(StdDequePrinter.to_string): Use it.
	(StdDequePrinter.num_children): New method.
	(Tr1UnorderedSetPrinter.num_children): New method.
	(Tr1UnorderedMapPrinter.num_children): New method.
	(StdSpanPrinter.num_children): New method.

2025-11-14  Tomasz Kamiński  <tkaminsk@redhat.com>

	* include/bits/unicode.h (_Utf_view): Rename the template parameter
	from _Range to _View and constrain it with ranges::view.
	(_Utf_view::_Utf_view): Accept by value instead of rvalue reference.
	* include/std/format (__format::__write_padded): Replace _Utf_view
	over const char32_t(&)[1] with span<const char32_t, 1>.
	* testsuite/ext/unicode/view.cc: Add checks if specialization
	of _Utf_view satisfy view. Wrap arrays into std::span before
	constructing _Utf_view.

2025-11-14  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/bitset: Add comment to feature test macro test.

2025-11-14  Karpalo Toivonen  <arktinenkarpalo@gmail.com>
	    Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/121054
	* include/std/bitset: Add string check to constructor.
	* testsuite/20_util/bitset/121054.cc: New test.
	* testsuite/20_util/bitset/cons/constexpr_c++23.cc: Fix.

2025-11-14  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/122032
	* include/std/functional (std::bind_front<f>, std::bind_back<f>):
	Define in terms of _Bind_front_t/_Bind_back_t.
	* testsuite/20_util/function_objects/bind_back/nttp.cc: New tests.
	* testsuite/20_util/function_objects/bind_front/nttp.cc: New tests.

2025-11-13  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/122661
	* include/bits/forward_list.h (forward_list::assign(I, I)): Fix
	value category in is_assignable check.
	* testsuite/23_containers/forward_list/modifiers/122661.cc:
	New test.

2025-11-13  Xavier Bonaventura  <xavibonaventura@gmail.com>

	* testsuite/18_support/headers/csignal/macros.cc: Check for
	SIG_IGN.

2025-11-13  Xavier Bonaventura  <xavibonaventura@gmail.com>

	* testsuite/18_support/headers/climits/values.cc: Check for
	LLONG_MIN, LLONG_MAX, and ULLONG_MAX.

2025-11-13  Tomasz Kamiński  <tkaminsk@redhat.com>

	* include/std/optional (__is_optional_ref): Define.
	* include/std/ranges (_Take::operator(), _Drop::operator())
	(_Reverse::operator()):	Handle optional<T> that are view.
	(_AsConst::operator()): Handle optional<T&>.
	* testsuite/20_util/optional/range.cc: New tests.

2025-11-13  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/115402
	PR libstdc++/122584
	* testsuite/29_atomics/atomic_ref/address.cc: Guard test for
	volatile with if constexpr.
	* testsuite/29_atomics/atomic_ref/deduction.cc: Likewise.
	* testsuite/29_atomics/atomic_ref/op_support.cc: Likewise.
	* testsuite/29_atomics/atomic_ref/requirements.cc: Likewise.
	* testsuite/29_atomics/atomic_ref/bool.cc: Use volatile_t alias.
	* testsuite/29_atomics/atomic_ref/generic.cc: Likewise.
	* testsuite/29_atomics/atomic_ref/integral.cc: Likewise.
	* testsuite/29_atomics/atomic_ref/pointer.cc: Likewise.
	* testsuite/29_atomics/atomic_ref/float.cc: Likewise, and remove
	not discarding if constexpr.

2025-11-12  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/122425
	* include/std/optional
	(ranges::enable_borrowed_range<optional<_Tp&>>): Define.
	* testsuite/20_util/optional/range.cc: Update tests.

2025-11-12  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/122396
	* include/std/optional (__optional_ref_base): Define.
	(std::optional<_Tp&>): Inherit from __optional_ref_base<_Tp>.
	(optional<_Tp&>::iterator): Move to base class.
	(optional<_Tp&>::begin, optional<_Tp&>::end): Use deduced return
	type and constrain accordingly.
	* testsuite/20_util/optional/range.cc: Add test for optional<T&>.

2025-11-12  Jason Merrill  <jason@redhat.com>

	* testsuite/18_support/exception_ptr/62258.cc: Use
	-Wno-deprecated-declarations instead of -Wno-deprecated.
	* testsuite/18_support/uncaught_exception/14026.cc
	* testsuite/20_util/headers/functional/synopsis.cc
	* testsuite/20_util/is_literal_type/requirements/explicit_instantiation.cc
	* testsuite/20_util/is_literal_type/requirements/typedefs.cc
	* testsuite/20_util/is_literal_type/value.cc
	* testsuite/20_util/is_pod/requirements/explicit_instantiation.cc
	* testsuite/20_util/is_pod/requirements/typedefs.cc
	* testsuite/20_util/is_pod/value.cc
	* testsuite/20_util/shared_ptr/assign/auto_ptr.cc
	* testsuite/20_util/shared_ptr/assign/auto_ptr_neg.cc
	* testsuite/20_util/shared_ptr/assign/auto_ptr_rvalue.cc
	* testsuite/20_util/shared_ptr/atomic/1.cc
	* testsuite/20_util/shared_ptr/atomic/2.cc
	* testsuite/20_util/shared_ptr/atomic/3.cc
	* testsuite/20_util/shared_ptr/cons/43820_neg.cc
	* testsuite/20_util/shared_ptr/cons/auto_ptr.cc
	* testsuite/20_util/shared_ptr/cons/auto_ptr_neg.cc
	* testsuite/20_util/shared_ptr/creation/dr925.cc
	* testsuite/20_util/unique_ptr/cons/auto_ptr.cc
	* testsuite/20_util/unique_ptr/cons/auto_ptr_neg.cc
	* testsuite/20_util/variable_templates_for_traits.cc
	* testsuite/29_atomics/atomic/lwg3220.cc
	* testsuite/experimental/type_traits/value.cc: Likewise.

2025-11-12  Jason Merrill  <jason@redhat.com>

	* testsuite/lib/prune.exp: Sync with gcc prune.exp.

2025-11-10  Jakub Jelinek  <jakub@redhat.com>

	* libsupc++/compare: Implement final wording of C++26 P3778R0 - Fix
	for type_order template definition.
	(std::type_order): Remove type member.

2025-11-03  Sam James  <sam@gentoo.org>

	* configure: Regenerate.

2025-11-03  Jason Merrill  <jason@redhat.com>

	* include/bits/quoted_string.h: Add ADL friends.
	* libsupc++/exception_ptr.h: Add ADL friend.

2025-11-03  Jason Merrill  <jason@redhat.com>

	* src/c++23/std.cc.in: Move TBB macro shenanigans after
	bits/stdc++.h.

2025-11-03  Jason Merrill  <jason@redhat.com>

	* include/precompiled/stdc++.h: Remove <cassert>.
	* testsuite/util/exception/safety.h: Add <cassert>.
	* testsuite/17_intro/headers/c++1998/stdc++_assert_neg.cc:
	Don't define _GLIBCXX_NO_ASSERT.

2025-11-03  Jason Merrill  <jason@redhat.com>

	* include/bits/ios_base.h: Add attribs to _Ios_Fmtflags,
	_Ios_Iostate, _ios_seekdir.
	* testsuite/27_io/ios_base/types/fmtflags/case_label.cc: Remove
	unneeded cases.
	* testsuite/27_io/ios_base/types/iostate/case_label.cc: Likewise.
	* testsuite/27_io/ios_base/types/openmode/case_label.cc: Likewise.
	* testsuite/27_io/ios_base/types/seekdir/case_label.cc: Likewise.

2025-11-02  Jason Merrill  <jason@redhat.com>

	* src/c++23/std.cc.in: Uncomment usings for vprint_*_buffered.

2025-10-30  Jakub Jelinek  <jakub@redhat.com>

	* include/bits/version.def (is_implicit_lifetime): New.
	* include/bits/version.h: Regenerate.
	* include/std/type_traits (std::is_implicit_lifetime,
	std::is_implicit_lifetime_v): New trait.
	* src/c++23/std.cc.in (std::is_implicit_lifetime,
	std::is_implicit_lifetime_v): Export.
	* testsuite/20_util/is_implicit_lifetime/version.cc: New test.
	* testsuite/20_util/is_implicit_lifetime/value.cc: New test.

2025-10-29  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/regex.tcc (regex_traits::value): Use __c instead
	of __ch.

2025-10-29  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/17_intro/headers/c++2011/42319.cc: Include <ios>
	instead of <bits/char_traits.h>. Add no_pch option. Remove
	explicit -std=gnu++11 option.
	* testsuite/30_threads/thread/swap/1.cc: Include <utility>
	instead of <bits/move.h>.

2025-10-29  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/119721
	* include/std/tuple (tuple<>::operator=(const _Tuple&) const)
	[__cpp_lib_ranges_zip]: Define.
	* testsuite/23_containers/tuple/cons/119721.cc: Test const
	assignment.

2025-10-29  Osama Abdelkader  <osama.abdelkader@gmail.com>
	    Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/119721
	* include/std/tuple (tuple<>::tuple(const tuple&))
	(tuple<>::operator=(const tuple&)): Define as defaulted.
	(tuple<>::swap): Moved the defintion after assignments.
	(tuple<>::tuple(_UTuple&&))
	(tuple<>::tuple(allocator_arg_t, const _Alloc&, _UTuple&&))
	(tuple<>::operator=(_UTuple&&)) [__cpp_lib_tuple_like]: Define.
	(tuple<>::operator==, tuple<>::opeator<=>): Parenthesize
	constrains individually.
	* testsuite/23_containers/tuple/cons/119721.cc: New test for
	constructors and assignments with empty tuple-like types.
	* testsuite/20_util/tuple/requirements/empty_trivial.cc:
	New test verifying tuple<> remains trivially copyable.

2025-10-29  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/regex.tcc (regex_traits::value): Implement
	without using istringstream.
	* include/std/regex: Do not include <sstream>.

2025-10-28  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/122401
	* testsuite/30_threads/shared_timed_mutex/try_lock_until/116586.cc:
	Do not try to acquire locks on the thread that already holds a
	lock. Add -pthread for et pthread.

2025-10-27  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/122401
	* testsuite/20_util/shared_ptr/atomic/pr118757.cc: Add -pthread
	for et pthread.
	* testsuite/20_util/weak_ptr/pr118757.cc: Likewise.
	* testsuite/30_threads/condition_variable/members/116586.cc:
	Likewise. Only run for hosted targets with gthreads support.
	* testsuite/30_threads/future/members/116586.cc: Likewise.
	* testsuite/30_threads/recursive_timed_mutex/try_lock_until/116586.cc:
	Likewise.
	* testsuite/30_threads/timed_mutex/try_lock_until/116586.cc:
	Likewise.

2025-10-27  Matthias Kretz  <m.kretz@gsi.de>

	* include/bits/utility.h (_IotaArray): Define.
	* testsuite/ext/iotaarray.cc: New test.

2025-10-27  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/108951
	* include/bits/valarray_array.h( __valarray_get_storage): Use
	std::__new_allocator.
	(__valarray_release_memory): Likewise.
	* include/std/valarray: Pass _M_size to
	__valarray_release_memory.
	* testsuite/26_numerics/valarray/108951.cc: New test.

2025-10-27  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/util/testsuite_iterators.h (test_container): Add
	iterator and value_type typedefs.

2025-10-24  Eric Pimentel Aguiar  <eric.pimentela@gmail.com>

	* src/c++23/std.cc.in (std::strided_slice, std::full_extent_t)
	(std::full_extent, std::submdspan_mapping_result): Add std
	qualification.

2025-10-24  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/122022
	* include/std/functional (_Bind_fn_t): Use forwarding reference as
	paremeter.
	(std::not_fn<f>): Use forwarding reference as lambda parameter.
	* testsuite/20_util/function_objects/bind_back/nttp.cc: Rework tests.
	* testsuite/20_util/function_objects/bind_front/nttp.cc: Likewise.
	* testsuite/20_util/function_objects/not_fn/nttp.cc: Add test for
	argument forwarding.

2025-10-22  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/122224
	* include/bits/stl_iterator_base_funcs.h (prev): Compare
	distance as n > 0 instead of n != 0.
	* testsuite/24_iterators/range_operations/122224.cc: New test.

2025-10-22  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/ranges (indices::operator()): Constrain using
	__can_iota_view concept.
	* testsuite/std/ranges/indices/1.cc: Check SFINAE-friendliness
	required by expression equivalence. Replace unused <vector>
	header with <stddef.h> needed for size_t.

2025-10-22  Giuseppe D'Angelo  <giuseppe.dangelo@kdab.com>
	    Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/121748
	* include/bits/version.def: Bump value for optional,
	* include/bits/version.h: Regenerate.
	* include/std/optional (std::__is_valid_contained_type_for_optional):
	Define.
	(std::optional<T>): Use __is_valid_contained_type_for_optional.
	(optional<T>(const optional<_Up>&), optional<T>(optional<_Up>&&))
	(optional<T>::operator=(const optional<_Up>&))
	(optional<T>::operator=(optional<_Up>&&)): Replacex._M_get() with
	x._M_fwd(), and std::move(x._M_get()) with std::move(x)._M_fwd().
	(optional<T>::and_then): Remove uncessary remove_cvref_t.
	(optional<T>::_M_fwd): Define.
	(std::optional<T&>): Define new partial specialization.
	(std::swap(std::optional<T&>, std::optional<T&>)): Define.
	(std::make_optional(_Tp&&)): Add non-type template parameter.
	(std::make_optional): Use parenthesis to constructor optional.
	(std::hash<optional<T>>): Add comment.
	* testsuite/20_util/optional/make_optional-2.cc: Guarded not longer
	working example.
	* testsuite/20_util/optional/relops/constrained.cc: Expand test to
	cover optionals of reference.
	* testsuite/20_util/optional/requirements.cc: Ammend for
	optional<T&>.
	* testsuite/20_util/optional/requirements_neg.cc: Likewise.
	* testsuite/20_util/optional/version.cc: Test new value of
	__cpp_lib_optional.
	* testsuite/20_util/optional/make_optional_neg.cc: New test.
	* testsuite/20_util/optional/monadic/ref_neg.cc: New test.
	* testsuite/20_util/optional/ref/access.cc: New test.
	* testsuite/20_util/optional/ref/assign.cc: New test.
	* testsuite/20_util/optional/ref/cons.cc: New test.
	* testsuite/20_util/optional/ref/internal_traits.cc: New test.
	* testsuite/20_util/optional/ref/make_optional/1.cc: New test.
	* testsuite/20_util/optional/ref/make_optional/from_args_neg.cc:
	New test.
	* testsuite/20_util/optional/ref/make_optional/from_lvalue_neg.cc:
	New test.
	* testsuite/20_util/optional/ref/make_optional/from_rvalue_neg.cc:
	New test.
	* testsuite/20_util/optional/ref/monadic.cc: New test.
	* testsuite/20_util/optional/ref/relops.cc: New test.

2025-10-22  Osama Abdelkader  <osama.abdelkader@gmail.com>

	PR libstdc++/119721
	* include/std/tuple (tuple<>::operator==, tuple<>::operator<=>):
	Define.
	* testsuite/23_containers/tuple/comparison_operators/119721.cc:
	New test.

2025-10-20  Yuao Ma  <c8ef@outlook.com>

	* include/bits/version.def: Add ranges_indices FTM.
	* include/bits/version.h: Regenerate.
	* include/std/ranges: Implement views::indices.
	* testsuite/std/ranges/indices/1.cc: New test.

2025-10-20  Tomasz Kamiński  <tkaminsk@redhat.com>

	* include/bits/funcwrap.h (__polyfunc::__deduce_funcref):
	Adjust signature produced for member object pointers.
	* testsuite/20_util/function_ref/deduction.cc: Update tests.

2025-10-20  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/122322
	* configure.ac (with_newlib) <*-rtems*>: Remove
	HAVE_SYS_IOCT4YL_H, _GLIBCXX_USE_LINK, _GLIBCXX_USE_READLINK,
	_GLIBCXX_USE_SYMLINK, _GLIBCXX_USE_TRUNCATE, and
	_GLIBCXX_USE_FDOPENDIR. Remove duplicates.
	* configure: Regenerate.

2025-10-18  Iain Sandoe  <iain@sandoe.co.uk>

	PR c++/119060
	* include/bits/version.def: Add observable_checkpoint at present
	allowed from C++26.
	* include/bits/version.h: Regenerate.
	* include/std/utility: Add std::observable_checkpoint().
	* src/c++23/std.cc.in: Add obervable_checkpoint () to utility.

2025-10-17  Tomasz Kamiński  <tkaminsk@redhat.com>

	* include/bits/atomic_base.h
	(__atomic_ref_base::_S_required_alignment): Renamed from...
	(__atomic_ref_base::_S_required_aligment): Renamed.

2025-10-16  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/stacktrace
	(operator<<(ostream&, const stacktrace_entry&)): Improve output
	when description() or source_file() returns an empty string,
	or the stacktrace_entry is invalid. Append frame address to
	output.
	(operator<<(ostream&, const basic_stacktrace<A>&)): Use the
	size_type of the correct specialization.

2025-10-15  Jonathan Wakely  <jwakely@redhat.com>

	* python/libstdcxx/v6/printers.py (StdStacktraceEntryPrinter):
	New printer for std::stacktrace_entry.
	(StdStacktracePrinter): New printer for std::basic_stacktrace.

2025-10-15  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/stacktrace (basic_stacktrace::current): Call
	_M_trim before returning.
	(basic_stacktrace::_M_trim): New member function.

2025-10-15  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/122293
	* include/bits/chrono.h (__to_timeout_timespec): Fix
	preprocessor condition to match the conditions under which
	callers of this function are defined.
	* include/bits/this_thread_sleep.h: Remove unused include.

2025-10-15  Chris Johns  <chrisj@rtems.org>

	* configure: Regenerate.
	* configure.ac (newlib, *-rtems*): Add HAVE_SYS_IOCTL_H,
	HAVE_SYS_STAT_H, HAVE_SYS_TYPES_H, HAVE_S_ISREG, HAVE_UNISTD_H,
	HAVE_UNLINKAT, _GLIBCXX_USE_CHMOD, _GLIBCXX_USE_MKDIR,
	_GLIBCXX_USE_CHDIR, _GLIBCXX_USE_GETCWD, _GLIBCXX_USE_UTIME,
	_GLIBCXX_USE_LINK, _GLIBCXX_USE_READLINK, _GLIBCXX_USE_SYMLINK,
	_GLIBCXX_USE_TRUNCATE and _GLIBCXX_USE_FDOPENDIR.

2025-10-14  Mike Crowe  <mac@mcrowe.com>

	PR libstdc++/116586
	* testsuite/30_threads/this_thread/sleep_for.cc: Add
	test_negative() test.
	* testsuite/30_threads/this_thread/sleep_until.cc: Make existing
	test use both system_clock and steady_clock. Add test_negative()
	test.

2025-10-14  Mike Crowe  <mac@mcrowe.com>

	PR libstdc++/116586
	* testsuite/30_threads/timed_mutex/try_lock_until/116586.cc: New
	test.

2025-10-14  Mike Crowe  <mac@mcrowe.com>

	PR libstdc++/116586
	* testsuite/30_threads/recursive_timed_mutex/try_lock_until/116586.cc:
	New test.

2025-10-14  Mike Crowe  <mac@mcrowe.com>

	PR libstdc++/116586
	* testsuite/30_threads/future/members/116586.cc: New test.

2025-10-14  Mike Crowe  <mac@mcrowe.com>

	PR libstdc++/116586
	* testsuite/30_threads/condition_variable/members/116586.cc: New
	test.

2025-10-14  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/116586
	* testsuite/30_threads/shared_timed_mutex/try_lock_until/116586.cc:
	New test.

2025-10-14  Mike Crowe  <mac@mcrowe.com>

	PR libstdc++/116586
	* testsuite/30_threads/semaphore/try_acquire_for.cc: Add tests.
	* testsuite/30_threads/semaphore/try_acquire_until.cc: Add
	tests.

2025-10-14  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/113327
	PR libstdc++/116586
	PR libstdc++/119258
	PR libstdc++/58931
	* include/bits/chrono.h (__to_timeout_timespec): New overloaded
	function templates for converting chrono types to timespec.
	* include/bits/std_mutex.h (__to_timeout_gthread_time_t): New
	function template for converting time_point to __gthread_time_t.
	* include/bits/this_thread_sleep.h (sleep_for): Use
	__to_timeout_timespec.
	(__sleep_for): Remove namespace-scope declaration.
	* include/std/condition_variable: Likewise.
	* include/std/mutex: Likewise.
	* include/std/shared_mutex: Likewise.
	* src/c++11/thread.cc (limit): New helper function.
	(__sleep_for): Use limit to prevent overflow when converting
	chrono::seconds to time_t, unsigned, or chrono::milliseconds.
	* src/c++20/atomic.cc: Use __to_timeout_timespec and
	__to_timeout_gthread_time_t for timeouts.
	* testsuite/30_threads/this_thread/113327.cc: New test.

2025-10-14  Luc Grosheintz  <luc.grosheintz@gmail.com>

	* include/std/format (_M_format_range): Remove unused local type
	alias _String.

2025-10-14  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/hashtable.h: Check specific feature test macros
	instead of checking thevalue of __cplusplus.
	* include/bits/stl_map.h: Likewise.
	* include/bits/stl_multimap.h: Likewise.
	* include/bits/stl_multiset.h: Likewise.
	* include/bits/stl_set.h: Likewise.
	* include/bits/stl_tree.h: Likewise.
	* include/bits/unordered_map.h: Likewise.
	* include/bits/unordered_set.h: 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.

2025-10-14  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/122255
	* src/c++17/fs_path.cc (path::_List::_Impl::~_Impl): Define
	destructor.
	(path::_List::_Impl::copy): Use create_unchecked.
	(path::_List::_Impl): Add static assertions.
	(path::_List::_Impl::create): New static member function.
	(path::_List::_Impl::create_unchecked): Likewise.
	(path::_List::_Impl_deleter::operator()): Use destructor.
	(path::_List::reserve): Use create.

2025-10-14  Tomasz Kamiński  <tkaminsk@redhat.com>

	* include/std/format (__format::__write_escape_seqs)
	(__format::_Escaping_sink): Define.
	(__format::__write_escaped_unicode_part): Extract from
	__format::__write_escaped_unicode.
	(__format::__write_escaped_unicode): Forward to
	__write_escaped_unicode_part.
	(__formatter_str::_M_format_range): Use _Escaping sink.
	* testsuite/std/format/ranges/string.cc: New tests for
	character which codepoints will be split in buffer and
	escaping. Invoked test_padding.

2025-10-14  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/118757
	* include/bits/shared_ptr_atomic.h (_Atomic_count::_M_wait_unlock):
	Add parameter capturing reference to _M_ptr. Reimplement in terms
	of __atomic_wait_address.
	(_Atomic_count::~_Atomic_count, _Atomic_count::lock)
	(_Atomic_count::unlock, _Atomic_count::_M_swap_unlock): Replace
	invocation of atomic member funcitons with __atomic builtins.
	(_Atomic_count::notify_one, _Atomic_count::notify_all):
	Use __atomic_notify_address.
	(_Sp_atomic::element_type): Define.
	(_Sp_atomic::_M_val): Change type to uintptr_t.
	(_Sp_atomic::wait): Pass _M_ptr to _M_wait_unlock.
	* python/libstdcxx/v6/printers.py:
	* testsuite/20_util/shared_ptr/atomic/pr118757.cc: New test.
	* testsuite/20_util/weak_ptr/pr118757.cc: New test.

2025-10-14  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/122267
	* include/bits/atomic_base.h
	(__atomic_ref_base<const _Tp>::_S_required_alignment):
	Use __alignof__	instead of alignof.

2025-10-14  Tomasz Kamiński  <tkaminsk@redhat.com>

	* testsuite/std/time/month_day/io.cc: New formatting tests.
	* testsuite/std/time/month_day_last/io.cc: Likewise.
	* testsuite/std/time/month_weekday/io.cc: Likewise.
	* testsuite/std/time/month_weekday_last/io.cc: Likewise.
	* testsuite/std/time/weekday_indexed/io.cc: Likewise.
	* testsuite/std/time/weekday_last/io.cc: Likewise.
	* testsuite/std/time/year_month/io.cc: Likewise.

2025-10-13  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/stl_iterator_base_funcs.h (advance): Fix comment.

2025-10-13  Yuao Ma  <c8ef@outlook.com>

	* include/bits/atomic_base.h: Implement address().
	* include/bits/version.def: Bump version number.
	* include/bits/version.h: Regenerate.
	* testsuite/29_atomics/atomic_ref/address.cc: New test.

2025-10-13  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/unicode.h (_Utf_view::_M_read_reverse_utf16):
	Fix check for high surrogate preceding low surrogate.
	* testsuite/ext/unicode/view.cc: Check unpaired low surrogates.

2025-10-13  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/unicode.h (__is_single_code_unit): Fix check for
	7-bit ASCII characters.

2025-10-11  Gerald Pfeifer  <gerald@pfeifer.com>

	* doc/xml/manual/build_hacking.xml: Update Autoconf manual link.
	* doc/html/manual/appendix_porting.html: Regenerate.

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

	PR libstdc++/122172
	* include/bits/shared_ptr_base.h (_Sp_counted_base): Define
	_Unsigned_count_type for make_unsigned<_Atomic_word>.
	Replace __int_traits<_Atomic_word> with equivalent expression.
	* include/ext/atomicity.h (_GLIBCXX_UNSIGNED_ATOMIC_WORD):
	Define macro for unsigned type to use for arithmetic.
	(__exchange_and_add_single, __atomic_add_single): Use it.

2025-10-10  Tomasz Kamiński  <tkaminsk@redhat.com>

	* testsuite/std/time/month_day_last/io.cc: Remove TODO comments
	for test_parse().
	* testsuite/std/time/month_weekday/io.cc: Likewise.
	* testsuite/std/time/month_weekday_last/io.cc: Likewise.
	* testsuite/std/time/weekday_indexed/io.cc: Likewise.
	* testsuite/std/time/weekday_last/io.cc: Likewise.
	* testsuite/std/time/year_month_day_last/io.cc: Likewise.
	* testsuite/std/time/year_month_weekday/io.cc: Likewise.
	* testsuite/std/time/year_month_weekday_last/io.cc: Likewise.

2025-10-10  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/121790
	* include/bits/chrono_io.h (enable_nonlocking_formatter_optimization):
	Adjust specializations for duration, hh_mm_ss and time_points.
	* include/std/format (enable_nonlocking_formatter_optimization):
	Apply remove_cvref_t on pair and tuple elements.
	* include/std/queue (enable_nonlocking_formatter_optimization):
	Change specialization value to false.
	* include/std/stack (enable_nonlocking_formatter_optimization):
	Change specialization value to false.
	* testsuite/std/format/ranges/adaptors.cc: Adjusted tests.
	* testsuite/std/format/tuple.cc: Adjusted tests.
	* testsuite/std/time/format/nonlocking.cc: Adjusted tests.

2025-10-10  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/121790
	* include/bits/chrono_io.h
	(enable_nonlocking_formatter_optimization): Define specializations
	for chrono types.
	* include/bits/version.def (print): Bump.
	* include/bits/version.h: Regenerate.
	* include/std/format (enable_nonlocking_formatter_optimization):
	Define specializations for pair, tuple and ranges.
	* include/std/queue (enable_nonlocking_formatter_optimization):
	Define specializations for queue and priority_queue.
	* include/std/stack (enable_nonlocking_formatter_optimization):
	Define specialization for stack.
	* include/std/stacktrace (enable_nonlocking_formatter_optimization):
	Define specialization for basic_stacktrace and stacktrace_entry.
	* include/std/thread (enable_nonlocking_formatter_optimization):
	Define specialization for thread::id.
	* include/std/vector (enable_nonlocking_formatter_optimization):
	Define specialization for vector<bool>::reference.
	* testsuite/23_containers/vector/bool/format.cc: Test value of
	enable_nonlocking_formatter_optimization.
	* testsuite/30_threads/thread/id/output.cc: Likewise.
	* testsuite/std/format/ranges/adaptors.cc: Likewise.
	* testsuite/std/format/ranges/formatter.cc: Likewise.
	* testsuite/std/format/tuple.cc: Likewise.
	* testsuite/std/time/format/empty_spec.cc: Extract Rep class
	to custom_rep.h.
	* testsuite/std/time/format/custom_rep.h: Extracted from
	empty_spec.cc.
	* testsuite/std/time/format/nonlocking.cc: New test.

2025-10-10  Jonathan Wakely  <jwakely@redhat.com>
	    Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/121790
	* acinclude.m4 (GLIBCXX_CHECK_STDIO_LOCKING): New macro to check
	for std::print dependencies.
	* config.h.in: Regenerate.
	* configure: Regenerate.
	* configure.ac: Use GLIBCXX_CHECK_STDIO_LOCKING.
	* include/bits/formatfwd.h (enable_nonlocking_formatter_optimization):
	Define new variable template.
	* include/bits/version.def (print): Bump value.
	* include/bits/version.h: Regenerate.
	* include/std/format (enable_nonlocking_formatter_optimization):
	Define specializations for variable template.
	* include/std/ostream (print) [!_WIN32]: Do not use
	vprint_unicode at all.
	(println): Append newline to format string instead of formatting
	twice.
	* include/std/print (_File_sink): New class.
	(vprint_nonunicode_locking): New function.
	(vprint_unicode_locking): New function reusing previous code
	from vprint_unicode.
	(vprintf_unicode): Defer to vprint_nonunicode for Windows or to
	vprint_unicode_locking otherwise.
	(print): [!_WIN32]: Do no use vprint_unicode at all.
	Check enable_nonlocking_formatter_optimization and defer to
	either vprint_nonunicode_locking or vprint_nonunicode.
	(println): Use vprint_unicode or format directly to a _File_sink
	instead of formatting twice.
	* testsuite/27_io/print/1.cc: Updated and added new tests.
	* testsuite/std/format/formatter/nonlocking.cc: New tests.

2025-10-10  Giuseppe D'Angelo  <giuseppe.dangelo@kdab.com>
	    Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/115402
	* include/bits/atomic_base.h (__atomic_ref_base<const _Tp>)
	(__atomic_ref_base<_Tp>): Define by extracting common methods
	from atomic_ref specializations.
	(__atomic_ref<_Tp, In, Fp, Pt>): Inherit from __atomic_ref_base
	and remove extracted method.
	(__atomic_ref<const _Tp, In, Fp, Pt>): Define.
	* include/std/atomic (std::atomic): Added an
	* testsuite/29_atomics/atomic/requirements/types_neg.cc:
	Add test for volatile qualified types.
	* testsuite/29_atomics/atomic_ref/bool.cc: Move the content
	to op_support.cc, add test for bool.
	* testsuite/29_atomics/atomic_ref/op_support.cc: New test
	expanded from atomic_ref/bool.cc.
	* testsuite/29_atomics/atomic_ref/cv_qual.cc: New test.
	* testsuite/29_atomics/atomic_ref/requirements_neg.cc: New test.
	* testsuite/29_atomics/atomic_ref/deduction.cc: Add tests for
	cv-qualified types.
	* testsuite/29_atomics/atomic_ref/float.cc: Likewise.
	* testsuite/29_atomics/atomic_ref/generic.cc: Likewise.
	* testsuite/29_atomics/atomic_ref/integral.cc: Likewise.
	* testsuite/29_atomics/atomic_ref/pointer.cc: Likewise.
	* testsuite/29_atomics/atomic_ref/requirements.cc: Likewise.
	* testsuite/29_atomics/atomic_ref/wait_notify.cc: Add tests for
	const qualified types.

2025-10-10  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/121929
	* include/bits/chrono_io.h (_ChronoData::_M_fill_aux)
	(_ChronoData::_M_fill_aux): Add comment documenting precondition.
	(formatter<chrono::year_month_day, _CharT>::format): Compute
	local_days inline.
	(formatter<chrono::year_month_day_last, _CharT>::format)
	(formatter<chrono::year_month_weekday, _CharT>::format)
	(formatter<chrono::year_month_weekday_last, _CharT>::format):
	Change how the _M_day field is computed.
	* testsuite/std/time/year_month_weekday/io.cc: Adjust tests.

2025-10-09  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/hashtable.h (_Hashtable::_S_nothrow_move): Use
	diagnostic pragmas to allow constexpr if in C++14. Use value
	member instead of operator().

2025-10-09  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/version.tpl: Fix comment on #endif. Tweak
	description of when macros are defined.
	* include/bits/version.h: Regenerate.

2025-10-09  Tomasz Kamiński  <tkaminsk@redhat.com>

	* testsuite/std/time/year_month_day_last/io.cc: New formatting tests.
	* testsuite/std/time/year_month_weekday/io.cc: Likewise.
	* testsuite/std/time/year_month_weekday_last/io.cc: Likewise.

2025-10-08  Jonathan Wakely  <jwakely@redhat.com>

	* doc/xml/manual/status_cxx2017.xml: Replace broken link to PSTL
	upstream.
	* doc/xml/manual/status_cxx2020.xml: Likewise.
	* doc/html/manual/status.html: Regenerate.

2025-10-08  Jonathan Wakely  <jwakely@redhat.com>

	* config/cpu/i486/atomicity.h: Removed.

2025-10-08  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/122172
	* config/cpu/cris/atomicity.h: Removed.

2025-10-08  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/indirect.h (indirect::operator=(indirect&&)):
	Move assign allocator when POCMA is true.
	(polymorphic::operator=(polymorphic&&)): Likewise.
	* testsuite/std/memory/indirect/copy.cc: Remove constexpr from
	functions that use tracker_allocator. Add test_constexpr().
	* testsuite/std/memory/indirect/copy_alloc.cc: Remove constexpr
	from all functions and remove static_assert.
	* testsuite/std/memory/indirect/ctor.cc: Do not use
	scoped_allocator_adaptor during constant evaluation.
	* testsuite/std/memory/indirect/move.cc: Remove constexpr from
	functions that use tracker_allocator. Add test_constexpr().
	* testsuite/std/memory/indirect/move_alloc.cc: Remove constexpr
	from all functions and remove static_assert.
	* testsuite/std/memory/indirect/relops.cc: Invoke lambda in
	static_assert.
	* testsuite/std/memory/polymorphic/copy.cc: Remove constexpr
	from functions that use tracker_allocator. Add test_constexpr().
	* testsuite/std/memory/polymorphic/copy_alloc.cc: Remove
	constexpr from all functions and remove static_assert.
	* testsuite/std/memory/polymorphic/ctor.cc: Do not use
	scoped_allocator_adaptor during constant evaluation.
	* testsuite/std/memory/polymorphic/ctor_poly.cc: Likewise.
	* testsuite/std/memory/polymorphic/move.cc: Remove constexpr
	from functions that use tracker_allocator. Add test_constexpr().
	* testsuite/std/memory/polymorphic/move_alloc.cc: Remove
	constexpr from all functions and remove static_assert.
	* testsuite/util/testsuite_allocator.h (tracker_allocator):
	Remove redundant 'inline' from friend.
	(uneq_allocator): Make all functions constexpr.
	(uneq_allocator::base, uneq_allocator::swap_base): Remove.
	(uneq_allocator::~uneq_allocator): Remove.
	(uneq_allocator::allocate, uneq_allocator::deallocate): Do not
	use map of allocations during constant evaluation.
	(propagating_allocator): Make all functions constexpr.
	(propagating_allocator::base): Remove.
	(propagating_allocator::swap_base): Simplify.
	(ExplicitConsAlloc, CustomPointerAlloc, NullablePointer): Add
	constexpr to all functions.

2025-10-08  Jakub Jelinek  <jakub@redhat.com>

	* include/bits/unicode-data.h: Regenerate.
	* testsuite/ext/unicode/properties.cc: Test __is_extended_pictographic
	on U+1F004 rather than U+1F000.

2025-10-08  Tomasz Kamiński  <tkaminsk@redhat.com>

	* include/bits/chrono_io.h (_ChronoData::_M_fill_day): Replace
	'%' by '/'.

2025-10-08  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/std/time/format/format.cc: Include <vector>.

2025-10-08  Luc Grosheintz  <luc.grosheintz@gmail.com>

	PR libstdc++/110352
	* include/std/mdspan (submdspan_mapping_result): New class.
	* src/c++23/std.cc.in (submdspan_mapping_result): Add.

2025-10-08  Luc Grosheintz  <luc.grosheintz@gmail.com>

	PR libstdc++/110352
	* include/std/mdspan (full_extent_t): New class.
	* src/c++23/std.cc.in (full_extent_t): Add.

2025-10-08  Luc Grosheintz  <luc.grosheintz@gmail.com>

	PR libstdc++/110352
	* include/bits/version.def (submdspan): New internal macro.
	* include/bits/version.h: Regenerate.
	* include/std/mdspan (strided_slice): New class.
	* src/c++23/std.cc.in (strided_slice): Add.
	* testsuite/23_containers/mdspan/submdspan/strided_slice.cc: New test.
	* testsuite/23_containers/mdspan/submdspan/strided_slice_neg.cc: New test.

2025-10-08  Luc Grosheintz  <luc.grosheintz@gmail.com>

	* include/std/mdspan (__mdspan::__index_type_cast): Optimize by
	skipping a __glibcxx_assert if it's know at compile-time.
	(std::layout_left_padded, std::layout_righ_padded): Reorder
	is_always_strided and is_unique member functions.
	* testsuite/23_containers/mdspan/int_like.h: Rename _M_i to
	value.

2025-10-08  Luc Grosheintz  <luc.grosheintz@gmail.com>

	PR libstdc++/110352
	* include/std/mdspan (_RightPaddedIndices): Traits for right
	padded layouts.
	(layout_right::mapping::mapping) New overload for right padded
	layouts.
	(layout_right_padded): Add implementation.
	* src/c++23/std.cc.in (layout_right_padded): Add.
	* testsuite/23_containers/mdspan/layouts/ctors.cc: Update
	test for right padded layouts.
	* testsuite/23_containers/mdspan/layouts/empty.cc: Ditto.
	* testsuite/23_containers/mdspan/layouts/mapping.cc: Ditto.
	* testsuite/23_containers/mdspan/layouts/padded.cc: Ditto.
	* testsuite/23_containers/mdspan/layouts/padded_neg.cc: Ditto.
	* testsuite/23_containers/mdspan/layouts/padded_traits.h: Ditto.

2025-10-08  Luc Grosheintz  <luc.grosheintz@gmail.com>

	PR libstdc++/110352
	* include/bits/version.def (padded_layouts): Add new internal
	feature testing macro.
	* include/bits/version.h: Regenerate.
	* include/std/mdspan (__fwd_prod): New overload.
	(layout_left_padded): Add declaration and implementation.
	(layout_right_padded): Add declaration only.
	(layout_left::mapping::mapping): New overload for left
	padded mappings.
	(__index_type_cast): New function that performs a checked cast
	to index_type.
	(__is_left_padded_mapping): New concept.
	(__is_right_padded_mapping): Ditto.
	(__standardized_mapping): Recognize left and right padded
	mappings.
	(_LeftPaddedIndices): Traits for left padded details.
	(_PaddedStorage): New class for implementing padded layouts.
	* src/c++23/std.cc.in (layout_left_padded): Add.
	* testsuite/23_containers/mdspan/layouts/class_mandate_neg.cc:
	Refactor and add tests for layout_left_padded.
	* testsuite/23_containers/mdspan/layouts/ctors.cc: Ditto.
	* testsuite/23_containers/mdspan/layouts/empty.cc: Ditto.
	* testsuite/23_containers/mdspan/layouts/mapping.cc: Ditto.
	* testsuite/23_containers/mdspan/layouts/padded.cc: Ditto.
	* testsuite/23_containers/mdspan/layouts/padded_neg.cc: Ditto.
	* testsuite/23_containers/mdspan/layouts/padded_traits.h: New
	traits.

2025-10-07  Jonathan Wakely  <jwakely@redhat.com>

	* configure.host: Fix spelling in comment.

2025-10-07  Jonathan Wakely  <jwakely@redhat.com>

	* include/ext/ropeimpl.h (rope::_S_fetch): Initialize variable.

2025-10-07  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/sat_arith.h (mul_sat): Add parentheses around
	operands.

2025-10-07  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/std/time/parse/parse.cc: Initialize variable.

2025-10-07  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/20_util/shared_ptr/cons/move.cc: Add comment and
	dg-prune-output for -Wpessimizing-move warning.
	* testsuite/experimental/memory/shared_ptr/cons/move_ctor.cc:
	Likewise.

2025-10-07  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/random.h (philox_engine(result_type)): Reorder
	ctor-initializer-list to match declaration order.

2025-10-07  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/basic_string.h (basic_string::_M_check): Cast
	size_type arguments to size_t.

2025-10-05  Sam James  <sam@gentoo.org>

	* Makefile.in: Regenerate.
	* aclocal.m4: Regenerate.
	* configure: Regenerate.
	* doc/Makefile.in: Regenerate.
	* include/Makefile.in: Regenerate.
	* libsupc++/Makefile.in: Regenerate.
	* po/Makefile.in: Regenerate.
	* python/Makefile.in: Regenerate.
	* src/Makefile.in: Regenerate.
	* src/c++11/Makefile.in: Regenerate.
	* src/c++17/Makefile.in: Regenerate.
	* src/c++20/Makefile.in: Regenerate.
	* src/c++23/Makefile.in: Regenerate.
	* src/c++26/Makefile.in: Regenerate.
	* src/c++98/Makefile.in: Regenerate.
	* src/experimental/Makefile.in: Regenerate.
	* src/filesystem/Makefile.in: Regenerate.
	* src/libbacktrace/Makefile.in: Regenerate.
	* testsuite/Makefile.in: Regenerate.

2025-10-03  Tomasz Kamiński  <tkaminsk@redhat.com>

	* doc/html/manual/index.html: Regenerated.
	* doc/html/manual/status.html: Regenerated.
	* doc/xml/manual/status_cxx2020.xml: Added status table.

2025-10-01  François Dumont  <frs.dumont@gmail.com>

	* include/std/vector (std::erase_if, std::erase): Replace _GLIBCXX20_CONSTEXPR
	with 'constexpr' and remove implied 'inline' keyword.
	* include/std/string (std::erase_if, std::erase): Likewise.

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

	* testsuite/28_regex/basic_regex/assign/wchar_t/pstring.cc: Use
	wcslen(cs) instead of sizeof(cs)-1.

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

	* testsuite/20_util/unique_ptr/modifiers/93562.cc: Define a
	separate deleter for array cases.

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

	* testsuite/27_io/basic_filebuf/seekoff/wchar_t/9875_seekoff.cc
	(Cvt::do_length): Fix signature to override virtual function in
	base.
	* testsuite/27_io/basic_filebuf/seekpos/wchar_t/9875_seekpos.cc:
	(Cvt::do_length): Likewise.
	* testsuite/27_io/basic_filebuf/underflow/char/1.cc
	(NoconvCvt::do_in): Likewise.
	* testsuite/27_io/basic_filebuf/underflow/wchar_t/11603.cc
	(checksumcvt::do_length): Likewise.

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

	* testsuite/22_locale/time_get/get/char/3.cc: Add parentheses to
	x == y|z expression.
	* testsuite/22_locale/time_get/get/wchar_t/3.cc: Likewise.
	* testsuite/28_regex/algorithms/regex_match/multiline.cc:
	Likewise.

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

	* include/bits/stl_uninitialized.h (uninitialized_copy)
	(uninitialized_fill, uninitialized_fill_n): Use pragmas to
	suppress -Wclass-memaccess warnings.

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

	* testsuite/std/memory/polymorphic/copy.cc: Fix spelling of
	typedef.

2025-09-30  François Dumont  <frs.dumont@gmail.com>

	* include/std/inplace_vector:
	(std::swap(inplace_vector<>&, inplace_vector<>&)): Remove the duplicated
	implementation at std namespace level. Keep the friend inline one.
	(inplace_vector<Tp, 0>::assign(initializer_list<>)): Add missing return
	statement.

2025-09-27  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/20_util/allocator_traits/members/allocate_hint.cc:
	Value-initialize variables to avoid -Wmaybe-uninitialized
	warning.
	* testsuite/20_util/allocator_traits/members/allocate_hint_nonpod.cc:
	Likewise.
	* testsuite/20_util/duration/114244.cc: Likewise.
	* testsuite/20_util/duration/io.cc: Likewise.

2025-09-27  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/deque.tcc (deque::_M_shrink_to_fit): Cast
	difference_type to size_type to avoid -Wsign-compare warning.
	* include/std/spanstream (basic_spanbuf::seekoff): Cast
	streamoff to size_t to avoid -Wsign-compare warning.

2025-09-27  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/21_strings/basic_string/numeric_conversions/char/stoi.cc:
	Fix assignment used instead of equality comparison.
	* testsuite/21_strings/basic_string/numeric_conversions/char/stol.cc:
	Likewise.
	* testsuite/21_strings/basic_string/numeric_conversions/char/stoll.cc:
	Likewise.
	* testsuite/21_strings/basic_string/numeric_conversions/char/stoul.cc:
	Likewise.
	* testsuite/21_strings/basic_string/numeric_conversions/char/stoull.cc:
	Likewise.
	* testsuite/21_strings/basic_string/numeric_conversions/wchar_t/stoi.cc:
	Likewise.
	* testsuite/21_strings/basic_string/numeric_conversions/wchar_t/stol.cc:
	Likewise.
	* testsuite/21_strings/basic_string/numeric_conversions/wchar_t/stoll.cc:
	Likewise.
	* testsuite/21_strings/basic_string/numeric_conversions/wchar_t/stoul.cc:
	Likewise.
	* testsuite/21_strings/basic_string/numeric_conversions/wchar_t/stoull.cc:
	Likewise.
	* testsuite/23_containers/map/cons/from_range.cc: Fix is_equal
	function and expected value of comparison functions after
	construction.
	* testsuite/23_containers/multimap/cons/from_range.cc: Likewise.
	* testsuite/23_containers/multiset/cons/from_range.cc: Likewise.
	* testsuite/23_containers/set/cons/from_range.cc: Likewise.
	* testsuite/23_containers/unordered_map/cons/from_range.cc: Fix
	is_equal functions.
	* 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/25_algorithms/minmax/constrained.cc: Fix assignment
	used instead of equality comparison.
	* testsuite/27_io/manipulators/extended/get_time/wchar_t/1.cc:
	Likewise.

2025-09-26  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/stl_algobase.h (__search, __is_permutation):
	Reuse predicate instead of creating a new one each time.
	* include/bits/stl_algo.h (__is_permutation): Likewise.

2025-09-26  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/deque (erase_if): Move predicate instead of
	wrapping with std::ref.
	(erase): Forward to erase_if.
	* include/std/inplace_vector (erase_if, erase): Likewise.
	* include/std/string (erase_if, erase): Likewise.
	* include/std/vector (erase_if, erase): Likewise.

2025-09-26  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/predefined_ops.h (equal_to, less): Define aliases
	for std::equal_to<void> and std::less<void>.
	(bind1st, bind2nd, not1, __equal_to): New object generator
	functions for adapting predicates.
	(__iter_less_iter, __iter_less_val, __iter_comp_val)
	(__val_less_iter, __val_comp_iter, __iter_equal_to_iter)
	(__iter_equal_to_val, __iter_comp_iter, __negate): Remove all
	object generator functions and the class templates they return.
	* include/bits/stl_algo.h (__move_median_to_first, __find_if_not)
	(__find_if_not_n, __search_n_aux, find_end, find_if_not)
	(__remove_copy_if, remove_copy, remove_copy_if, remove)
	(remove_if, __adjacent_find, __unique, unique, __unique_copy)
	(__unique_copy_1, __stable_partition_adaptive, stable_partition)
	(__heap_select, __partial_sort_copy, partial_sort_copy)
	(__unguarded_linear_insert, __insertion_sort)
	(__unguarded_insertion_sort, __unguarded_partition)
	(lower_bound, __upper_bound, upper_bound, __equal_range)
	(equal_range, binary_search, __move_merge_adaptive)
	(__move_merge_adaptive_backward, __merge_adaptive_resize)
	(__merge_without_buffer, inplace_merge, __move_merge)
	(__includes, includes, __next_permutation, next_permutation)
	(__prev_permutation, prev_permutation, __replace_copy_if)
	(replace_copy, replace_copy_if, __is_sorted_until)
	(is_sorted_until, __minmax_element, minmax_element, minmax)
	(is_permutation, __is_permutation, find, find_if, adjacent_find)
	(count, count_if, search, search_n, unique_copy, partial_sort)
	(nth_element, sort, __merge, merge, stable_sort, __set_union)
	(set_union, __set_intersection, set_intersection)
	(__set_difference, set_difference, __set_symmetric_difference)
	(set_symmetric_difference, __min_element, min_element)
	(__max_element, max_element, min, max): Use direct predicates
	instead of __iter_equal_to_iter, __iter_comp_iter, and
	__iter_less_iter, __negate etc. Dereference iterators when
	invoking predicates.
	* include/bits/stl_algobase.h (__lexicographical_compare_impl)
	(__lexicographical_compare::__lc, __lower_bound, lower_bound)
	(lexicographical_compare, __mismatch, mismatch, __find_if)
	(__count_if, __remove_if, __search, __is_permutation)
	(is_permutation, search): Likewise.
	* include/bits/stl_function.h (equal_to<void>, less<void>):
	Define transparent comparison functions for C++98 and C++11.
	* include/bits/stl_heap.h (__is_heap_until, __is_heap)
	(__push_heap, push_heap, __adjust_heap, pop_heap, make_heap)
	(sort_heap, is_heap_until, is_heap): Likewise.
	* include/std/deque (erase_if): Remove call to __pred_iter.
	(erase): Replace __iter_equals_val with __equal_to.
	* include/std/inplace_vector (erase_if, erase): Likewise.
	* include/std/string (erase_if, erase): Likewise.
	* include/std/vector (erase_if, erase): Likewise.

2025-09-26  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/122062
	* include/bits/random.tcc (__detail::__normalize): Use void cast
	for operands of comma operator.
	(piecewise_linear_distribution): Likewise.
	* testsuite/26_numerics/random/piecewise_linear_distribution/cons/122062.cc:
	New test.

2025-09-25  Luc Grosheintz  <luc.grosheintz@gmail.com>

	* include/std/mdspan (__static_quotient): New overload.

2025-09-25  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/stl_algo.h: Check robust_nonmodifying_seq_ops
	feature test macro instead of checking __cplusplus value. Add
	comment to another __cplusplus check.
	* include/bits/stl_algobase.h: Add comment to #endif.

2025-09-25  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/79147
	PR libstdc++/103650
	* include/Makefile.am (c++config.h): Adjust sed command to
	comment out STDC_HEADERS macro.
	* include/Makefile.in: Regenerate.

2025-09-25  Luc Grosheintz  <luc.grosheintz@gmail.com>

	* testsuite/23_containers/mdspan/layouts/empty.cc: Fix indent.
	* testsuite/23_containers/mdspan/layouts/mapping.cc
	(test_stride_1d): Fix test.
	(test_stride_2d): Rewrite using a struct.
	(test_stride_3d): Ditto.
	(has_static_is_exhaustive): New concept.
	(test_mapping_properties): Update test.

2025-09-24  Luc Grosheintz  <luc.grosheintz@gmail.com>
	    Tomasz Kamiński  <tkaminsk@redhat.com>

	* testsuite/20_util/function_objects/not_fn/nttp.cc: Move
	test of feature testing macro to version.cc
	* testsuite/20_util/function_objects/not_fn/version.cc: New test.

2025-09-24  Tomasz Kamiński  <tkaminsk@redhat.com>

	* include/bits/chrono_io.h (__formatter_duration::_S_spec_for_tp):
	Extracted from defition of formatter<sys_time>::__defSpec.
	(formatter<chrono::sys_time<_Duration>, _CharT>::parse): Simplify
	condition in if contexpr.
	(formatter<chrono::sys_time<_Duration>, _CharT>::__stream_insertable):
	Remove.
	(formatter<chrono::sys_time<_Duration>, _CharT>::__defSpec)
	(formatter<chrono::local_time<_Duration>, _CharT>::__defSpec):
	Compute using __formatter_duration::_S_spec_for_tp.
	(forrmatter<chrono::sys_time<_Duration>, _CharT>::parse): Check if
	parse _M_chrono_spec
	* testsuite/std/time/format/empty_spec.cc: Extend tests for floating
	point and other non-streamable durations (years).

2025-09-24  Tomasz Kamiński  <tkaminsk@redhat.com>

	* include/bits/chrono_io.h (__formatter_chrono::_M_parse):
	Replace _ParseContext with basic_format_parse_context<_CharT> and
	make it non-template.
	(__formatter_duration::_M_parse): Replace _ParseContext with
	basic_format_parse_context<_CharT> and remove unused default
	argument.

2025-09-24  Patrick Palka  <ppalka@redhat.com>

	* testsuite/17_intro/names.cc: Undefine 'u' on s390*-linux.

2025-09-23  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/random.h: Include <bits/ios_base.h> instead of
	<iomanip>. Change preprocessor checks to use internal feature
	test macro.
	(philox_engine): Reword doxygen comments. Use typename instead
	of class in template parameter lists. Reformat and adjust
	whitespace.
	(philox_engine::_If_seed_seq): Replace alias template with
	__is_seed_seq variable template.
	(philox_engine::philox_engine(result_type)): Define inline.
	(philox_engine::seed(result_type), philox_engine::set_counter)
	(philox_engine::operator(), philox_engine::discard): Likewise.
	(operator==): Define as defaulted.
	(operator<<): Reuse widened char.
	* include/bits/random.tcc: Reformat and adjust whitespace.
	(philox_engine::_M_philox): Use std::array copy constructor and
	std::array::fill instead of looping.
	* testsuite/26_numerics/random/philox4x32.cc: Gate test on
	feature test macro. Add static_assert to check typedef.
	* testsuite/26_numerics/random/philox4x64.cc: Likewise.
	* testsuite/26_numerics/random/philox_engine/cons/copy.cc: Add
	VERIFY assertions to check copies are equal. Test different
	seeds.
	* testsuite/26_numerics/random/philox_engine/cons/default.cc:
	Add VERIFY assertions to check construction results.
	* testsuite/26_numerics/random/philox_engine/cons/seed.cc:
	Likewise.
	* testsuite/26_numerics/random/philox_engine/operators/equal.cc:
	Also test inequality.
	* testsuite/26_numerics/random/philox_engine/operators/serialize.cc:
	Remove redundant include and return.
	* testsuite/26_numerics/random/philox_engine/requirements/constants.cc:
	Check values of all constants.
	* testsuite/26_numerics/random/philox_engine/requirements/typedefs.cc:
	Check typedefs are correct.
	* testsuite/26_numerics/random/philox_engine/cons/119794.cc:
	Removed.
	* testsuite/26_numerics/random/philox_engine/cons/seed_seq.cc:
	Removed.
	* testsuite/26_numerics/random/philox_engine/operators/inequal.cc:
	Removed.
	* testsuite/26_numerics/random/philox_engine/requirements/constexpr_data.cc:
	Removed.
	* testsuite/26_numerics/random/philox_engine/requirements/constexpr_functions.cc:
	Removed.
	* testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error
	line number.

2025-09-23  1nfocalypse  <1nfocalypse@protonmail.com>

	PR libstdc++/119794
	* include/bits/random.h (philox_engine): Define.
	* include/bits/random.tcc (philox_engine): Define member
	functions.
	* include/bits/version.def (philox_engine): New macro.
	* include/bits/version.h: Regenerated.
	* include/std/random: Define __glibcxx_want_philox_engine and
	include <bits/version.h>.
	* testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error
	line number.
	* testsuite/26_numerics/random/philox4x32.cc: New test.
	* testsuite/26_numerics/random/philox4x64.cc: New test.
	* testsuite/26_numerics/random/philox_engine/cons/119794.cc: New test.
	* testsuite/26_numerics/random/philox_engine/cons/copy.cc: New test.
	* testsuite/26_numerics/random/philox_engine/cons/default.cc: New test.
	* testsuite/26_numerics/random/philox_engine/cons/seed.cc: New test.
	* testsuite/26_numerics/random/philox_engine/cons/seed_seq.cc: New test.
	* testsuite/26_numerics/random/philox_engine/operators/equal.cc: New test.
	* testsuite/26_numerics/random/philox_engine/operators/inequal.cc: New test.
	* testsuite/26_numerics/random/philox_engine/operators/serialize.cc: New test.
	* testsuite/26_numerics/random/philox_engine/requirements/constants.cc: New test.
	* testsuite/26_numerics/random/philox_engine/requirements/constexpr_data.cc: New test.
	* testsuite/26_numerics/random/philox_engine/requirements/constexpr_functions.cc: New test.
	* testsuite/26_numerics/random/philox_engine/requirements/typedefs.cc: New test.

2025-09-23  Ben Wu  <soggysocks206@gmail.com>

	PR libstdc++/118087
	* include/bits/deque.tcc: Use _Temporary_value in
	_M_emplace_aux.
	* include/bits/stl_deque.h: Introduce _Temporary_value.
	* testsuite/23_containers/deque/modifiers/emplace/118087.cc:
	New test.

2025-09-23  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/121940
	* include/bits/funcwrap.h (__polyfunc::__deduce_funcref): Return void
	for ill-formed constructs.
	(function_ref(nontype_t<__f>, _Tp&&)): Constrain on __deduce_funcref
	producing non-void results.
	* testsuite/20_util/function_ref/deduction.cc: Negative tests.

2025-09-23  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/79147
	* include/Makefile.am (c++config.h): Adjust sed command to
	comment out all PACKAGE_XXX macros and to avoid adjusting
	PACKAGE_VERSION twice.
	* include/Makefile.in: Regenerate.

2025-09-23  Tomasz Kamiński  <tkaminsk@redhat.com>

	* include/bits/chrono_io.h (formatter<chrono::utc_time, _CharT>):
	(formatter<chrono::gps_time<_Duration>, _CharT>)
	(formatter<chrono::tai_time<_Duration>, _CharT): Remove
	__formatter_chrono base class.

2025-09-22  Tomasz Kamiński  <tkaminsk@redhat.com>

	* include/bits/chrono_io.h(__formatter_chrono::_M_parse): Update
	needed flags for %g, %G, %V, %U, %W.
	(__formatter_chrono::_M_format_to): Change how %V is handled.
	(__formatter_chrono::_M_g_G): Merged into _M_g_G_V.
	(__formatter_chrono::_M_g_G_V): Reworked from _M_g_G.
	(__formatter_chrono::_M_U_V_W): Changed into _M_U_V.
	(__formatter_chrono::_M_U_W): Reworked implementation.
	* testsuite/std/time/year_month_day/io.cc: New tests.

2025-09-22  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/106658
	* include/bits/stl_construct.h (std::start_lifetime_as_array)
	(std::start_lifetime_as): Moved from std/memory, with update
	to guard macros.
	* include/std/memory (std::start_lifetime_as_array)
	(std::start_lifetime_as): Moved to bits/stl_construct.h.

2025-09-19  Nathan Myers  <ncm@cantrip.org>

	PR libstdc++/119744
	* include/bits/version.def: Redefine __cpp_lib_bind_front etc.
	* include/bits/version.h: Ditto.
	* include/std/functional: Add new bind_front etc. overloads
	* testsuite/20_util/function_objects/bind_back/1.cc:
	Check plumbing better
	* testsuite/20_util/function_objects/bind_back/nttp.cc: New test.
	* testsuite/20_util/function_objects/bind_back/nttp_neg.cc: New test.
	* testsuite/20_util/function_objects/bind_front/1.cc:
	Check plumbing better
	* testsuite/20_util/function_objects/bind_front/nttp.cc: New test.
	* testsuite/20_util/function_objects/bind_front/nttp_neg.cc: New test.
	* testsuite/20_util/function_objects/not_fn/nttp.cc: New test.
	* testsuite/20_util/function_objects/not_fn/nttp_neg.cc: New test.
	* testsuite/20_util/headers/functional/synopsis.cc: New decls.

2025-09-19  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/chrono_io.h: Remove unused <iomanip> header.
	(operator<<): Constrain overload for chrono::local_time.
	* testsuite/std/time/clock/local/io.cc: Check constraints.

2025-09-19  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/version.def (start_lifetime_as): Move adjacent to
	other C++23 macros.
	* include/bits/version.h: Regenerate.

2025-09-18  Jakub Jelinek  <jakub@redhat.com>

	PR c++/106658
	* include/bits/version.def: Implement C++23 P2590R2 - Explicit
	lifetime management.
	(start_lifetime_as): New.
	* include/bits/version.h: Regenerate.
	* include/std/memory (std::start_lifetime_as,
	std::start_lifetime_as_array): New function templates.
	* src/c++23/std.cc.in (std::start_lifetime_as,
	std::start_lifetime_as_array): Export.
	* testsuite/std/memory/start_lifetime_as/start_lifetime_as.cc: New test.

2025-09-17  Patrick Palka  <ppalka@redhat.com>

	PR libstdc++/111861
	* include/bits/ranges_algo.h (ranges::unique_copy): When
	initializing a value type object from *iter, use
	direct-initialization and don't use a deduced type.
	(ranges::push_heap): Use direct-initialization when initializing
	a value type object from ranges::iter_move.
	(ranges::max): As in ranges::unique_copy.
	* include/bits/ranges_util.h (ranges::min): Likewise.

2025-09-17  Patrick Palka  <ppalka@redhat.com>

	* testsuite/20_util/bind/dangling_ref.cc: Compile with
	-Wsystem-headers.
	* testsuite/20_util/ratio/operations/ops_overflow_neg.cc: Likewise.
	* testsuite/20_util/unique_ptr/lwg4148.cc: Likewise.
	* testsuite/29_atomics/atomic/operators/pointer_partial_void.cc:
	Likewise.
	* testsuite/30_threads/packaged_task/cons/dangling_ref.cc:
	Likewise.

2025-09-16  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/ranges (__detail::__repeated_tuple): Use
	__make_tuple helper alias directly, instead of doing overload
	resolution on std::tuple_cat.
	* include/std/tuple (__make_tuple_impl): Remove.
	(__do_make_tuple): Replace recursion with _Index_tuple and pack
	expansion.
	(__make_tuple): Adjust to new __do_make_tuple definition.
	(__combine_tuples<tuple<T1s...>, tuple<T2s...>, Rem...>): Replace
	with a partial specialization for exactly two tuples and a
	partial specialization for three or more tuples.

2025-09-16  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/121913
	* include/bits/ranges_algo.h (__rotate_fn::operator()): Use
	auto_value_t<_Iter> instead of deduced type.

2025-09-16  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/121956
	* include/std/ranges (adjacent_view::_Iterator::value_type):
	Always define as std::tuple<T, N>, not std::pair<T, T>.
	* testsuite/std/ranges/adaptors/adjacent/1.cc: Check value type
	of views::pairwise.

2025-09-16  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/stl_uninitialized.h (uninitialized_move)
	(uninitialized_move_n): Replace _GLIBCXX_MAKE_MOVE_ITERATOR with
	std::make_move_iterator.

2025-09-16  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/119820
	* include/bits/ranges_algo.h (__shuffle_fn): Use
	ranges::distance to get difference type value to add to
	iterator.
	* include/std/format (__formatter_str::_M_format_range):
	Use ranges::next to increment iterator by a size_t value.

2025-09-13  Patrick Palka  <ppalka@redhat.com>

	PR libstdc++/121917
	* include/bits/ranges_algo.h (__shuffle_fn::operator()): Only
	consider the two-at-a-time PRNG optimization if the range is
	sized.
	* testsuite/25_algorithms/shuffle/constrained.cc (test03): New
	test.

2025-09-12  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/121913
	* include/bits/ranges_algo.h (__rotate_fn::operator()): Use
	ranges::iter_move(it) instead of std::move(*it).
	* testsuite/25_algorithms/rotate/121913.cc: New test.

2025-09-12  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/121890
	* include/bits/ranges_algo.h (ranges::rotate, ranges::shuffle)
	(__insertion_sort, __unguarded_partition_pivot, __introselect):
	Use ranges::next to advance iterators. Use local variables in
	rotate to avoid duplicate expressions.
	(ranges::push_heap, ranges::pop_heap, ranges::partial_sort)
	(ranges::partial_sort_copy): Use ranges::prev.
	(__final_insertion_sort): Use iter_difference_t<Iter>
	for operand of operator+ on iterator.
	* include/bits/ranges_base.h (ranges::advance): Use iterator's
	difference_type for all iterator arithmetic.
	* include/bits/stl_algo.h (__search_n_aux, __rotate)
	(__insertion_sort, __unguarded_partition_pivot, __introselect)
	(__final_insertion_sort, for_each_n, random_shuffle): Likewise.
	Use local variables in __rotate to avoid duplicate expressions.
	* include/bits/stl_algobase.h (__fill_n_a, __lc_rai::__newlast1):
	Likewise.
	* include/bits/stl_heap.h (push_heap): Likewise.
	(__is_heap_until): Add static_assert.
	(__is_heap): Convert distance to difference_type.
	* include/std/functional (boyer_moore_searcher::operator()): Use
	iterator's difference_type for iterator arithmetic.
	* testsuite/util/testsuite_iterators.h
	(random_access_iterator_wrapper): Add deleted overloads of
	operators that should be called with difference_type.
	* testsuite/24_iterators/range_operations/advance.cc: Use
	ranges::next.
	* testsuite/25_algorithms/heap/constrained.cc: Use ranges::next
	and ranges::prev.
	* testsuite/25_algorithms/nth_element/58800.cc: Use std::next.
	* testsuite/25_algorithms/nth_element/constrained.cc: Use
	ptrdiff_t for loop variable.
	* testsuite/25_algorithms/nth_element/random_test.cc: Use
	iterator's difference_type instead of int.
	* testsuite/25_algorithms/partial_sort/check_compare_by_value.cc:
	Use std::next.
	* testsuite/25_algorithms/partial_sort/constrained.cc: Use
	ptrdiff_t for loop variable.
	* testsuite/25_algorithms/partial_sort/random_test.cc: Use
	iterator's difference_type instead of int.
	* testsuite/25_algorithms/partial_sort_copy/constrained.cc:
	Use ptrdiff_t for loop variable.
	* testsuite/25_algorithms/partial_sort_copy/random_test.cc:
	Use iterator's difference_type instead of int.
	* testsuite/std/ranges/adaptors/drop.cc: Use ranges::next.
	* testsuite/25_algorithms/fill_n/diff_type.cc: New test.
	* testsuite/25_algorithms/lexicographical_compare/diff_type.cc:
	New test.

2025-09-12  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/117276
	* include/pstl/parallel_backend_tbb.h (__func_task::finalize):
	Make deallocation unconditional.

2025-09-12  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/121046
	* include/debug/bitset (bitset(const CharT*, ...)): Add
	constraints on CharT type.

2025-09-12  Jonathan Wakely  <jwakely@redhat.com>

	* config/cpu/generic/atomicity_mutex/atomicity.h
	(__exchange_and_add): Use const_cast to remove volatile.

2025-09-11  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/71945
	* include/bits/shared_ptr_base.h (_Sp_counted_base::_S_chk):
	Trap if a reference count cannot be incremented any higher.
	(_Sp_counted_base::_M_add_ref_copy): Use _S_chk.
	(_Sp_counted_base::_M_add_weak_ref): Likewise.
	(_Sp_counted_base<_S_mutex>::_M_add_ref_lock_nothrow): Likewise.
	(_Sp_counted_base<_S_atomic>::_M_add_ref_lock_nothrow): Likewise.
	(_Sp_counted_base<_S_single>::_M_add_ref_copy): Use _S_chk.

2025-09-11  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/71945
	* include/bits/shared_ptr_base.h
	(_Sp_counted_base::_M_get_use_count): Cast _M_use_count to
	unsigned before returning as long.
	(_Sp_counted_base<_S_single>::_M_add_ref_copy): Use atomic
	helper function to adjust ref count using unsigned arithmetic.
	(_Sp_counted_base<_S_single>::_M_weak_release): Likewise.
	(_Sp_counted_base<_S_single>::_M_get_use_count): Cast
	_M_use_count to unsigned before returning as long.
	(_Sp_counted_base<_S_single>::_M_add_ref_lock_nothrow): Use
	_M_add_ref_copy to do increment using unsigned arithmetic.
	(_Sp_counted_base<_S_single>::_M_release): Use atomic helper and
	_M_weak_release to do decrements using unsigned arithmetic.
	(_Sp_counted_base<_S_mutex>::_M_release): Add comment.
	(_Sp_counted_base<_S_single>::_M_weak_add_ref): Remove
	specialization.

2025-09-11  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/121148
	* config/cpu/generic/atomicity_mutex/atomicity.h
	(__exchange_and_add): Call __exchange_and_add_single.
	* include/ext/atomicity.h (__exchange_and_add_single): Use an
	unsigned type for the addition.
	* libsupc++/Makefile.am (atomicity.o): Compile with -fwrapv.
	* libsupc++/Makefile.in: Regenerate.

2025-09-11  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/iterator_concepts.h (_IterMove::_S_noexcept)
	(_IterSwap::_S_noexcept): Change constexpr to consteval.
	* include/bits/ranges_base.h (_Begin::_S_noexcept)
	(_End::_S_noexcept, _RBegin::_S_noexcept, _REnd::_S_noexcept)
	(_Size::_S_noexcept, _Empty::_S_noexcept, _Data::_S_noexcept):
	Likewise.
	* include/std/concepts (_Swap::_S_noexcept): Likewise.

2025-09-11  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/ranges_base.h (__detail::__to_unsigned_like)
	(__access::__possible_const_range, __access::__as_const)
	(__distance_fn::operator(), __next_fn::operator())
	(__prev_fn::operator()): Add always_inline attribute.
	(_Begin::operator(), _End::operator(), _RBegin::operator())
	(_REnd::operator(), _Size::operator(), _SSize::operator())
	(_Empty::operator(), _Data::operator(), _SSize::operator()):
	Likewise. Move nodiscard attribute to start of declaration.

2025-09-11  Giuseppe D'Angelo  <giuseppe.dangelo@kdab.com>

	* include/bits/shared_ptr_base.h (__weak_ptr): Avoid calling
	lock() when converting or assigning a weak_ptr<Derived> to
	a weak_ptr<Base> in case Base is not a virtual base of Derived.
	This logic is centralized in _S_safe_upcast, called by the
	various converting constructors/assignment operators.
	(_S_safe_upcast): New helper function.
	* testsuite/20_util/weak_ptr/cons/virtual_bases.cc: New test.

2025-09-11  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/syncstream: Remove trailing whitespace.

2025-09-11  Tomasz Kamiński  <tkaminsk@redhat.com>

	* testsuite/std/time/year_month_day/io.cc: Additional tests.

2025-09-10  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/unique_ptr.h: Remove blank line.

2025-09-10  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/functional (boyer_moore_searcher::operator()): Add
	static_assert.
	(boyer_moore_horspool_searcher::operator()): Likewise.
	* testsuite/20_util/function_objects/121782.cc: New test.

2025-09-10  Luc Grosheintz  <luc.grosheintz@gmail.com>

	* include/std/mdspan (_ExtentsStorage::_Base): New name for
	_S_base.
	(_ExtentsStorage::_Storage): New name for _S_storage.
	(extents::_Storage): New name for _S_storage.
	(layout_stride::mapping::_Strides): New name for
	_S_stries_t.
	* testsuite/23_containers/mdspan/class_mandate_neg.cc: Update
	test to the new error message.

2025-09-10  Luc Grosheintz  <luc.grosheintz@gmail.com>

	* include/std/span (__integral_constant_like): Use
	remove_cvref_t before checking if _Tp::value is boolean.
	* testsuite/23_containers/mdspan/extents/misc.cc: Update test.
	* testsuite/23_containers/mdspan/mdspan.cc: Ditto.
	* testsuite/23_containers/span/deduction.cc: Ditto.

2025-09-10  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/121765
	* include/std/format (__format::_Drop_iter): Define.
	(_Iter_for_t::type): Change alias to _Drop_iter.
	(__format::__format_padded): Return __fc.out() for
	_Drop_iter.
	* testsuite/std/format/pr121765.cc: New test.

2025-09-10  Tomasz Kamiński  <tkaminsk@redhat.com>

	* doc/html/manual/status.html: Regenerate.
	* doc/xml/manual/status_cxx2020.xml: Add more entires.

2025-09-10  Tomasz Kamiński  <tkaminsk@redhat.com>

	* doc/html/index.html: Regenerated.
	* doc/html/manual/index.html: Regenerated.
	* doc/html/manual/intro.html: Regenerated.
	* doc/html/manual/status.html: Regenatered.
	* doc/xml/manual/status_cxx2020.xml: Add iso.2020.specific
	section with atomic_ref documentation.

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

	* include/std/type_traits (_CwFixedValue::_S_type): Rename to
	__type.
	(constant_wrapper): Rename template parameter in declaration to
	match later definition.

2025-09-09  Arsen Arsenović  <arsen@aarsen.me>

	* doc/xml/manual/using_exceptions.xml: Replace "Tunables" link
	with one that does not have an anchor.
	* doc/html/manual/using_exceptions.html: Regenerate.

2025-09-08  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/type_traits (constant_wrapper): Rename template
	parameter to avoid BADNAME.

2025-09-08  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/120698
	* doc/xml/manual/configure.xml: Do not claim that vtv is enabled
	by default.
	* doc/html/manual/configure.html: Regenerate.

2025-09-08  Nathan Myers  <ncm@cantrip.org>

	* src/c++20/Makefile.in: Mention syncbuf.lo.

2025-09-08  Nathan Myers  <ncm@cantrip.org>

	* include/std/syncstream: (syncbuf<>::__mutex) Remove _S_get_mutex,
	use extern function instead.
	* src/c++20/syncbuf.cc: Define global __syncbuf_get_mutex.
	* src/c++20/Makefile.am: Mention syncbuf.cc.
	* src/c++20/Makefile.in: Regenerate.
	* config/abi/pre/gnu.ver: Mention mangled __syncbuf_get_mutex.

2025-09-08  Jakub Jelinek  <jakub@redhat.com>

	PR libstdc++/121827
	* include/precompiled/extc++.h: Don't include ext/cast.h which is an
	internal header.
	* include/ext/pointer.h: Include bits/c++config.h before
	#if _GLIBCXX_HOSTED.

2025-09-08  Gerald Pfeifer  <gerald@pfeifer.com>

	* doc/xml/manual/using_exceptions.xml: Update link to "Tunables"
	section in the Glibc manual.
	* doc/html/manual/using_exceptions.html: Regenerate.

2025-09-08  Luc Grosheintz  <luc.grosheintz@gmail.com>

	* include/std/span (__integral_constant_like): Allow the member
	`value` of a constant wrapping type to be a const reference of
	an integer.
	* testsuite/23_containers/mdspan/extents/misc.cc: Add test for
	cw and constant_wrapper.
	* testsuite/23_containers/mdspan/mdspan.cc: Ditto.
	* testsuite/23_containers/span/deduction.cc: Ditto.

2025-09-08  Luc Grosheintz  <luc.grosheintz@gmail.com>
	    Tomasz Kamiński  <tkaminsk@redhat.com>

	* include/bits/version.def (constant_wrapper): Add.
	* include/bits/version.h: Regenerate.
	* include/std/type_traits (_CwFixedValue): New class.
	(_IndexSequence): New struct.
	(_BuildIndexSequence): New struct.
	(_ConstExprParam): New concept.
	(_CwOperators): New struct.
	(constant_wrapper): New struct.
	(cw): New global constant.
	* src/c++23/std.cc.in (constant_wrapper): Add.
	(cw): Add.
	* testsuite/20_util/constant_wrapper/adl.cc: New test.
	* testsuite/20_util/constant_wrapper/ex.cc: New test.
	* testsuite/20_util/constant_wrapper/generic.cc: New test.
	* testsuite/20_util/constant_wrapper/instantiate.cc: New test.
	* testsuite/20_util/constant_wrapper/op_comma_neg.cc: New test.
	* testsuite/20_util/constant_wrapper/version.cc: New test.
	* testsuite/20_util/constant_wrapper/other_wrappers.cc: New file.

2025-09-05  Patrick Palka  <ppalka@redhat.com>

	PR libstdc++/121804
	* include/std/ranges (join_view::_Iterator::_M_get_inner):
	Mark noexcept.
	* testsuite/std/ranges/adaptors/join.cc (test16): New test.

2025-09-05  Tomasz Kamiński  <tkaminsk@redhat.com>

	* doc/html/manual/status.html: Regenerate.
	* doc/xml/manual/status_cxx2011.xml: Add entry for bad_function_call.
	* doc/xml/manual/status_cxx2017.xml: Add entries for bad_any_cast
	and nullptr_t output. Update entry for sf.cmath. Fix stable name for
	mem.res.

2025-09-05  Tomasz Kamiński  <tkaminsk@redhat.com>

	* doc/html/manual/status.html: Regenerate the file.
	* doc/xml/manual/status_cxx2017.xml: Addd more entires.

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

	* include/std/ranges (join_view::_Iterator::_M_satisfy):
	Adjust to handle non-std::optional _M_inner as per before LWG 3569.
	(join_view::_Iterator::_M_get_inner): New.
	(join_view::_Iterator::_M_inner): Don't wrap in std::optional if
	the iterator is forward.  Initialize.
	(join_view::_Iterator::operator*): Use _M_get_inner instead
	of *_M_inner.
	(join_view::_Iterator::operator++): Likewise.
	(join_view::_Iterator::iter_move): Likewise.
	(join_view::_Iterator::iter_swap): Likewise.

2025-09-04  Tomasz Kamiński  <tkaminsk@redhat.com>

	* include/bits/binders.h (_Binder::_S_call): Make public.
	* include/std/ranges (ranges::_Partial<_Adaptor, _Args...>):
	Replace tuple<_Args...> with _Bind_back_t<_Adaptor, _Args...>.
	(ranges::_Partial<_Adaptor, _Arg>): Remove.

2025-09-04  Tomasz Kamiński  <tkaminsk@redhat.com>

	* include/Makefile.am: Add bits/binders.h
	* include/Makefile.in: Add bits/binders.h
	* include/std/functional (std::_Indexed_bound_arg, std::_Binder)
	(std::__make_bound_args, std::_Bind_front_t, std::_Bind_back_t):
	Moved to bits/binders.h file, that is now included.
	* include/bits/binders.h: New file.

2025-09-04  Tomasz Kamiński  <tkaminsk@redhat.com>

	* include/std/functional: (std::_Indexed_bound_arg): Fixed
	indentation.
	(__Bound_arg_storage::_S_apply_front)
	(__Bound_arg_storage::_S_apply_front): Merged into _S_apply.
	(__Bound_arg_storage::_S_apply): Merged above, add _Back template
	parameter, replace std::invoke with std::__invoke.
	(std::_Bind_front): Renamed to std::_Binder and add _Back
	template parameter.
	(std::_Binder): Renamed from std::_Bind_front.
	(_Binder::_Result_t, _Binder::_S_noexcept_invoke): Define.
	(_Binder::operator()): Use _Result_t and _S_noexcept_invoke.
	(_Binder::_S_call): Handle zero args specially, replace std::invoke
	with std::__invoke.
	(std::_Bind_front_t, std::_Bind_back_t): Defined in terms
	of _Binder.
	(std::_Bind_back): Merged into _Binder.
	* testsuite/20_util/function_objects/bind_back/1.cc: New tests.
	* testsuite/20_util/function_objects/bind_back/111327.cc: Updated
	error messages.
	* testsuite/20_util/function_objects/bind_front/1.cc: New tests.
	* testsuite/20_util/function_objects/bind_front/111327.cc: Updated
	error messages.

2025-09-04  Luc Grosheintz  <luc.grosheintz@gmail.com>

	* include/std/mdspan (layout_left::mapping::operator()): Add
	_GLIBCXX_RESOLVE_LIB_DEFECTS marker for 4314.
	(layout_left::mapping::operator()): Ditto.
	(layout_stride::mapping::operator()): Ditto.

2025-09-04  Tomasz Kamiński  <tkaminsk@redhat.com>

	* doc/html/manual/status.html: Regenerated the file.
	* doc/xml/manual/status_cxx1998.xml: Add stable name to
	each entry.

2025-09-03  Yihan Wang  <yronglin777@gmail.com>

	* include/std/expected (expected(U&&)): Add missing constraint
	as per LWG 4222.
	* testsuite/20_util/expected/lwg4222.cc: New test.

2025-09-03  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/121745
	* include/bits/stl_pair.h (get): Use forward instead of move in
	std::get<T> overloads for rvalue pairs.
	* testsuite/20_util/pair/astuple/get_by_type.cc: Check all value
	categories and cv-qualification.

2025-09-03  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/110853
	* include/bits/stl_pair.h [C++20] (pair(const T1&, const T2&)):
	Use std::type_identity_t<T1> for first parameter.
	* testsuite/20_util/pair/cons/110853.cc: New test.

2025-09-03  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/version.def (chrono_cxx20): Define.
	* include/bits/version.h: Regenerate.
	* include/std/chrono: Check __glibcxx_chrono_cxx20 instead of
	__cpp_lib_chrono for C++20 features that don't require the new
	std::string ABI and/or can be used for freestanding.
	* src/c++20/clock.cc: Adjust preprocessor condition.

2025-09-02  Luc Grosheintz  <luc.grosheintz@gmail.com>

	* include/bits/utility.h (_Index_tuple): Move to <type_traits>.
	(_Build_index_tuple): Ditto.
	* include/std/type_traits (_Index_tuple): Ditto.
	(_Build_index_tuple): Ditto.

2025-09-02  Tomasz Kamiński  <tkaminsk@redhat.com>

	* libsupc++/compare (__cmp_cat::__literal_zero): Rename
	from __unspec.
	(__cmp_cat::__unspec): Rename to __literal_zero.
	(operator==, operator<, operator>, operator<=, operator>=):
	Replace __cmp_cat::__unspec to __cmp_cat::__literal_zero.

2025-08-31  Gerald Pfeifer  <gerald@pfeifer.com>

	* doc/xml/manual/using_exceptions.xml: Update link to
	Boost's "Exception-Safety"
	* doc/html/manual/using_exceptions.html: Rebuild.

2025-08-31  Jonathan Wakely  <jwakely@redhat.com>

	* src/c++26/debugging.cc [_GLIBCXX_HAVE_SYS_PTRACE_H]: Include
	<sys/types.h>.
	(breakpoint) [__i386__ || __x86_64__]: Use "int 0x03" instead of
	"int3".

2025-08-28  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/119670
	* acinclude.m4 (GLIBCXX_CHECK_DEBUGGING): Check for facilities
	needed by <debugging>.
	* config.h.in: Regenerate.
	* configure: Regenerate.
	* configure.ac: Use GLIBCXX_CHECK_DEBUGGING.
	* include/Makefile.am: Add new header.
	* include/Makefile.in: Regenerate.
	* include/bits/version.def (debugging): Add.
	* include/bits/version.h: Regenerate.
	* include/precompiled/stdc++.h: Add new header.
	* src/c++26/Makefile.am: Add new file.
	* src/c++26/Makefile.in: Regenerate.
	* include/std/debugging: New file.
	* src/c++26/debugging.cc: New file.
	* testsuite/19_diagnostics/debugging/breakpoint.cc: New test.
	* testsuite/19_diagnostics/debugging/breakpoint_if_debugging.cc:
	New test.
	* testsuite/19_diagnostics/debugging/is_debugger_present.cc: New
	test.
	* testsuite/19_diagnostics/debugging/is_debugger_present-2.cc:
	New test.

2025-08-28  Tomasz Kamiński  <tkaminsk@redhat.com>

	* testsuite/18_support/comparisons/categories/zero_neg.cc: New test.

2025-08-28  Weslley da Silva Pereira  <weslley.spereira@gmail.com>

	* include/std/complex (polar, __complex_sqrt, pow)
	(__complex_pow_unsigned): Use explicit conversions from int to
	the complex value_type.

2025-08-28  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/121046
	* include/std/bitset (bitset(const CharT*, ...)): Add
	constraints on CharT type.
	* testsuite/23_containers/bitset/lwg4294.cc: New test.

2025-08-28  Tomasz Kamiński  <tkaminsk@redhat.com>

	* libsupc++/compare (__cmp_cat::_Ord): Add unordered enumerator.
	(__cmp_cat::_Ncmp): Remove.
	(__cmp_cat::__ord, __cmp_cat::__make):  Define.
	(partial_ordering::partial_ordering(__cmp_cat::_Ncmp)): Remove.
	(operator<=>(__cmp_cat::__unspec, partial_ordering))
	(partial_ordering::unordered): Replace _Ncmp with _Ord.
	(std::partial_ordering, std::weak_ordering, std::strong_ordering):
	Befriend __ord and __make helpers, remove friend declartions for
	other orderings.
	(__compare::__fp_weak_ordering): Remove unused __cat variable.
	Simplify ordering conversions.

2025-08-27  Tomasz Kamiński  <tkaminsk@redhat.com>

	* libsupc++/compare
	(operator<=>(__cmp_cat::__unspec, partial_ordering)):
	Implement using _M_reverse.

2025-08-27  Nathan Myers  <ncm@cantrip.org>

	* include/std/chrono (gps_clock::now, tai_clock::now): Remove
	inline definitions.
	* src/c++20/clock.cc (gps_clock::now, tai_clock::now): New file
	for out-of-line now() impls.
	* src/c++20/Makefile.am: Mention clock.cc.
	* src/c++20/Makefile.in: Regenerate.
	* config/abi/pre/gnu.ver: add mangled now() symbols.

2025-08-27  Tomasz Kamiński  <tkaminsk@redhat.com>

	* libsupc++/compare (_Ncmp::_Unordered): Rename and change the value
	to minimum value of signed char.
	(_Ncomp::unordered): Renamed from _Unordered, the name is reserved
	by partial_ordered::unordered.
	(partial_ordering::_M_reverse()): Define.
	(operator<=(partial_ordering, __cmp_cat::__unspec))
	(operator>=(__cmp_cat::__unspec, partial_ordering)): Implemented
	in terms of negated _M_value.
	(operator>=(partial_ordering, __cmp_cat::__unspec))
	(operator<=(__cmp_cat::__unspec, partial_ordering)): Directly
	compare _M_value, as unordered value is negative.
	(partial_ordering::unordered): Handle _Ncmp::unoredred rename.
	* python/libstdcxx/v6/printers.py: Add -128 as integer value
	for unordered, keeping 2 to preserve backward compatibility.

2025-08-27  Tomasz Kamiński  <tkaminsk@redhat.com>

	* include/bits/funcwrap.h (__polyfunc::_Mo_base): Reorder _M_manage
	and _M_storage members. Make _M_destroy protected and remove friend
	declaration.
	* testsuite/20_util/copyable_function/call.cc: Add test for aliasing
	base class.
	* testsuite/20_util/move_only_function/call.cc: Likewise.

2025-08-26  Patrick Palka  <ppalka@redhat.com>

	* include/std/ranges (__detail::_CachedPosition): Remove
	additional size constraint on the offset-based partial
	specialization.

2025-08-26  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/90192
	* include/bits/stl_vector.h (vector<T>::_M_fill_append): Declare.
	(vector<T>::fill): Use _M_fill_append instead of _M_fill_insert.
	* include/bits/vector.tcc (vector<T>::_M_fill_append): Define
	(vector<T>::_M_fill_insert): Delegate to _M_fill_append when
	elements are appended.
	* testsuite/23_containers/vector/modifiers/moveable.cc: Updated
	copycount for inserting at the end (appending).
	* testsuite/23_containers/vector/modifiers/resize.cc: New test.
	* testsuite/backward/hash_set/check_construct_destroy.cc: Updated
	copycount, the hash_set constructor uses insert to fill buckets
	with nullptrs.

2025-08-26  Tomasz Kamiński  <tkaminsk@redhat.com>

	* include/bits/move.h (std::__like_impl, std::__like_t): Make
	available in c++11.
	* include/std/functional (std::_Indexed_bound_arg)
	(std::_Bound_arg_storage, std::__make_bound_args): Define.
	(std::_Bind_front, std::_Bind_back): Use _Bound_arg_storage.
	* testsuite/20_util/function_objects/bind_back/1.cc: Expand
	test to cover cases of 0, 1, many bound args.
	* testsuite/20_util/function_objects/bind_back/111327.cc: Likewise.
	* testsuite/20_util/function_objects/bind_front/1.cc: Likewise.
	* testsuite/20_util/function_objects/bind_front/111327.cc: Likewise.

2025-08-26  Tomasz Kamiński  <tkaminsk@redhat.com>

	* include/std/stop_token (__variant::_Never_valueless_alt): Declare.
	(__variant::_Never_valueless_alt<std::stop_token>)
	(__variant::_Never_valueless_alt<std::stop_source>): Define.
	* include/std/thread: (__variant::_Never_valueless_alt): Declare.
	(__variant::_Never_valueless_alt<std::jthread>): Define.

2025-08-21  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/121496
	* acinclude.m4 (GLIBCXX_CHECK_PTHREAD_MUTEX_CLOCKLOCK): Do not
	use _GLIBCXX_TSAN in _GLIBCXX_USE_PTHREAD_MUTEX_CLOCKLOCK macro.
	* configure: Regenerate.

2025-08-21  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/121496
	* include/std/mutex (__timed_mutex_impl::_M_try_wait_until):
	Change preprocessor condition to use #if instead of #ifdef.
	(recursive_timed_mutex::_M_clocklock): Likewise.
	* testsuite/30_threads/timed_mutex/121496.cc: New test.

2025-08-21  Luc Grosheintz  <luc.grosheintz@gmail.com>

	PR libstdc++/120994
	* include/bits/version.def (aligned_accessor): Add.
	* include/bits/version.h: Regenerate.
	* include/std/mdspan (aligned_accessor): New class.
	* src/c++23/std.cc.in (aligned_accessor): Add.
	* testsuite/23_containers/mdspan/accessors/generic.cc: Add tests
	for aligned_accessor.
	* testsuite/23_containers/mdspan/accessors/aligned_neg.cc: New test.
	* testsuite/23_containers/mdspan/version.cc: Add test for
	__cpp_lib_aligned_accessor.
	* testsuite/23_containers/mdspan/accessors/debug/aligned_access_neg.cc: New file.
	* testsuite/23_containers/mdspan/accessors/debug/aligned_offset_neg.cc: New file.

2025-08-21  Luc Grosheintz  <luc.grosheintz@gmail.com>

	PR libstdc++/120994
	* include/bits/align.h (is_sufficiently_aligned): New function.
	* include/bits/version.def (is_sufficiently_aligned): Add.
	* include/bits/version.h: Regenerate.
	* include/std/memory: Add __glibcxx_want_is_sufficiently_aligned.
	* src/c++23/std.cc.in (is_sufficiently_aligned): Add.
	* testsuite/20_util/headers/memory/version.cc: Add test for
	__cpp_lib_is_sufficiently_aligned.
	* testsuite/20_util/is_sufficiently_aligned/1.cc: New test.

2025-08-21  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/121374
	* include/std/limits (numeric_limits<__float128>::max_digits10):
	Fix value.
	* testsuite/18_support/numeric_limits/128bit.cc: Check value.

2025-08-21  Jonathan Wakely  <jwakely@redhat.com>

	PR c++/117294
	* testsuite/20_util/optional/cons/value_neg.cc: Prune additional
	output for C++20 and later.
	* testsuite/20_util/scoped_allocator/69293_neg.cc: Match
	additional error for C++20 and later.

2025-08-21  Luc Grosheintz  <luc.grosheintz@gmail.com>

	* include/bits/version.def (mdspan): Set value for C++26.
	* include/bits/version.h: Regenerate.
	* include/std/mdspan (dims): Add.
	* src/c++23/std.cc.in (dims): Add.
	* testsuite/23_containers/mdspan/extents/misc.cc: Add tests.
	* testsuite/23_containers/mdspan/version.cc: Update test.

2025-08-21  Luc Grosheintz  <luc.grosheintz@gmail.com>

	* include/std/mdspan (__static_prod): Delete.
	(__fwd_partial_prods): Compute at compile-time in O(rank), not
	O(rank**2).
	(__rev_partial_prods): Ditto.
	(__size): Inline __static_prod.

2025-08-21  Luc Grosheintz  <luc.grosheintz@gmail.com>

	* include/std/mdspan (__fwd_partial_prods): Reduce size of the
	array by 1 element.

2025-08-21  Luc Grosheintz  <luc.grosheintz@gmail.com>

	* include/std/mdspan (__valid_static_extent): Replace
	numeric_limits with __int_traits.
	(extents::_S_ctor_explicit): Ditto.
	(extents::__static_quotient): Ditto.
	(layout_stride::mapping::mapping): Ditto.
	(mdspan::size): Ditto.
	* testsuite/23_containers/mdspan/extents/class_mandates_neg.cc:
	Update test with additional diagnostics.

2025-08-21  Luc Grosheintz  <luc.grosheintz@gmail.com>

	* include/std/mdspan (extents::operator==): Replace loop with
	pack expansion.

2025-08-21  Luc Grosheintz  <luc.grosheintz@gmail.com>

	* include/std/mdspan (__mdspan::__all_static): New function.
	(__mdspan::_StaticExtents::_S_is_dyn): Inline and eliminate.
	(__mdspan::_ExtentsStorage::_S_is_dynamic): New method.
	(__mdspan::_ExtentsStorage::_M_extent): Use _S_is_dynamic.

2025-08-21  Luc Grosheintz  <luc.grosheintz@gmail.com>

	* include/std/mdspan (__fwd_prods): Relax condition for fully-dynamic
	extents to cover (dyn, ..., dyn, X).
	(__rev_partial_prods): Analogous for (X, dyn, ..., dyn).

2025-08-21  Luc Grosheintz  <luc.grosheintz@gmail.com>

	* include/std/mdspan (__mdspan::__all_dynamic): New function.
	(__mdspan::_StaticExtents::_S_dynamic_index): Convert to method.
	(__mdspan::_StaticExtents::_S_dynamic_index_inv): Ditto.
	(__mdspan::_StaticExtents): New specialization for fully dynamic
	extents.
	(__mdspan::__fwd_prod): New constexpr if branch to avoid
	instantiating __fwd_partial_prods.
	(__mdspan::__rev_prod): Ditto.

2025-08-21  Luc Grosheintz  <luc.grosheintz@gmail.com>

	* include/std/mdspan (__mdspan::__fwd_prod): Optimize
	for rank <= 2.
	(__mdspan::__rev_prod): Ditto.
	(__mdspan::__size): Refactor to use a pre-computed product, not
	a partial product.

2025-08-21  Luc Grosheintz  <luc.grosheintz@gmail.com>

	* include/std/mdspan (__mdspan::__static_prod): New function.
	(__mdspan::__fwd_partial_prods): Constexpr array of partial
	forward products.
	(__mdspan::__fwd_partial_prods): Same for reverse partial
	products.
	(__mdspan::__static_extents_prod): Delete function.
	(__mdspan::__extents_prod): Renamed from __exts_prod and refactored.
	include/std/mdspan (__mdspan::__fwd_prod): Compute as the
	product of pre-computed static static and the product of dynamic
	extents.
	(__mdspan::__rev_prod): Ditto.

2025-08-21  Luc Grosheintz  <luc.grosheintz@gmail.com>

	* include/std/mdspan (__mdspan::_StaticExtents): Extract non IndexType
	related code from _ExtentsStorage.
	(__mdspan::_ExtentsStorage): Use _StaticExtents.
	(__mdspan::__static_extents): Return reference to NTTP of _StaticExtents.
	(__mdspan::__contains_zero): New overload.
	(__mdspan::__exts_prod, __mdspan::__static_quotient): Use span to avoid
	copying __sta_exts.

2025-08-19  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/104874
	* testsuite/24_iterators/random_access/string_vector_iterators.cc:
	Call test6642.

2025-08-18  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/121476
	* include/bits/ranges_algo.h (__all_of_fn::operator()):
	(__any_of_fn::operator(), __none_of_fn::operator())
	(__find_first_of_fn::operator(), __count_fn::operator())
	(__find_end_fn::operator(), __remove_if_fn::operator())
	(__remove_fn::operator(), __unique_fn::operator())
	(__is_sorted_until_fn::operator(), __is_sorted_fn::operator())
	(__lower_bound_fn::operator(), __upper_bound_fn::operator())
	(__equal_range_fn::operator(), __binary_search_fn::operator())
	(__is_partitioned_fn::operator(), __partition_point_fn::operator())
	(__minmax_fn::operator(), __min_element_fn::operator())
	(__includes_fn::operator(), __max_fn::operator())
	(__lexicographical_compare_fn::operator(), __clamp__fn::operator())
	(__find_last_fn::operator(), __find_last_if_fn::operator())
	(__find_last_if_not_fn::operator()): Add [[nodiscard]] attribute.
	* include/bits/ranges_algobase.h (__equal_fn::operator()):
	Add [[nodiscard]] attribute.
	* include/bits/ranges_util.h (__find_fn::operator())
	(__find_if_fn::operator(), __find_if_not_fn::operator())
	(__mismatch_fn::operator(), __search_fn::operator())
	(__min_fn::operator(), __adjacent_find_fn::operator()):
	Add [[nodiscard]] attribute.
	* include/bits/stl_algo.h (std::min(initializer_list<T>))
	(std::min(initializer_list<T>, _Compare))
	(std::max(initializer_list<T>))
	(std::mmax(initializer_list<T>, _Compare)): Add _GLIBCXX_NODISCARD.
	* testsuite/25_algorithms/min/constrained.cc: Silence nodiscard
	warning.
	* testsuite/25_algorithms/max/constrained.cc: Likewise.
	* testsuite/25_algorithms/minmax/constrained.cc: Likewise.
	* testsuite/25_algorithms/minmax_element/constrained.cc: Likewise.

2025-08-18  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/121313
	* include/bits/vector.tcc (vector::insert_range): Add check for
	empty size.
	* testsuite/23_containers/vector/modifiers/insert/insert_range.cc:
	New tests.

2025-08-10  H.J. Lu  <hjl.tools@gmail.com>

	* configure: Regenerated.

2025-08-07  Gerald Pfeifer  <gerald@pfeifer.com>

	* doc/xml/manual/build_hacking.xml: Switch gcc.gnu.org installation
	docs to https.
	* doc/html/manual/appendix_porting.html: Regenerate.

2025-08-05  Jakub Jelinek  <jakub@redhat.com>

	PR libstdc++/121373
	* src/c++23/std.cc.in (std::ranges::iter_move, std::ranges::iter_swap):
	Remove exports.

2025-08-04  Jakub Jelinek  <jakub@redhat.com>
	    hexne  <printfne@gmail.com>

	PR libstdc++/121373
	* src/c++23/std.cc.in (std::ranges::shift_left,
	std::ranges::shift_right): Only export for C++23 and later.
	(std::ranges::fold_left_first_with_iter_result,
	std::ranges::fold_left_with_iter_result): Export.
	(std::byteswap): Export for C++23 and later.
	(std::ranges::iter_move, std::ranges::iter_swap): Export.
	(std::projected_value_t): Export for C++26 and later.
	(std::out_ptr_t, std::inout_ptr_t): Export.
	(std::ranges::iota_result): Export.
	(std::regex_constants): Export a lot of constants.
	(std::is_scoped_enum, std::is_scoped_enum_v): Export.

2025-08-04  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/121128
	* include/bits/indirect.h (indirect::operator*):
	Cast __self to approparietly qualified indirect.
	* testsuite/std/memory/indirect/access.cc: New test.
	* testsuite/std/memory/polymorphic/access.cc: New test.

2025-08-03  Jakub Jelinek  <jakub@redhat.com>

	* src/c++23/std.cc.in (std::owner_equal, std::owner_hash): Export.

2025-07-30  François Dumont  <frs.dumont@gmail.com>

	* testsuite/std/time/format/data_not_present_neg.cc: Remove _GLIBCXX_USE_DUAL_ABI
	check.

2025-07-29  Tomasz Kamiński  <tkaminsk@redhat.com>

	* testsuite/std/format/ranges/format_kind.cc: New test.

2025-07-28  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/102181
	* include/bits/stl_iterator_base_funcs.h (distance, advance):
	Check C++20 iterator concepts and handle appropriately.
	(__detail::__iter_category_converts_to_concept): New concept.
	(__detail::__promotable_iterator): New concept.
	* testsuite/24_iterators/operations/cxx20_iterators.cc: New
	test.

2025-07-28  Nathan Myers  <ncm@cantrip.org>

	PR libstdc++/119742
	* include/debug/bitset: Add new ctor.

2025-07-28  Luc Grosheintz  <luc.grosheintz@gmail.com>

	* include/std/mdspan: Small stylistic adjustments.

2025-07-28  Luc Grosheintz  <luc.grosheintz@gmail.com>

	* testsuite/23_containers/mdspan/accessors/generic.cc: Refactor
	test_ctor.

2025-07-28  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/121196
	* include/std/inplace_vector (std::erase): Provide default argument
	for _Up parameter.
	* testsuite/23_containers/inplace_vector/erasure.cc: Add test for
	using braces-init-list as arguments to erase_if and use function
	to verify content of inplace_vector

2025-07-25  Tuur Martens  <tuurmartens4@gmail.com>

	* include/bits/unordered_map.h: Rectify referencing of
	non-existent type.

2025-07-24  Nathaniel Shead  <nathanieloshead@gmail.com>

	PR c++/117294
	PR c++/113854
	* testsuite/20_util/any/misc/any_cast_neg.cc: Adjust
	diagnostics.
	* testsuite/20_util/expected/illformed_neg.cc: Likewise.
	* testsuite/20_util/optional/monadic/or_else_neg.cc: Likewise.
	* testsuite/23_containers/array/creation/3_neg.cc: Likewise.
	* testsuite/24_iterators/range_generators/lwg3900.cc: Likewise.
	* testsuite/29_atomics/atomic/requirements/types_neg.cc:
	Likewise.
	* testsuite/30_threads/stop_token/stop_callback/invocable_neg.cc:
	Likewise.
	* testsuite/30_threads/stop_token/stop_callback/destructible_neg.cc:
	Likewise.
	* testsuite/std/format/arguments/args_neg.cc: Likewise.
	* testsuite/std/format/string_neg.cc: Likewise.

2025-07-24  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/104874
	* testsuite/24_iterators/random_access/string_vector_iterators.cc:
	Reworked.

2025-07-24  Tomasz Kamiński  <tkaminsk@redhat.com>

	* testsuite/21_strings/basic_string/cons/from_range.cc: Replace
	test_constexpr with test_ranges inside static_assert.
	* testsuite/21_strings/basic_string/modifiers/append/append_range.cc:
	Likewise.
	* testsuite/21_strings/basic_string/modifiers/assign/assign_range.cc:
	Likewise.
	* testsuite/21_strings/basic_string/modifiers/insert/insert_range.cc:
	Likewise.
	* testsuite/21_strings/basic_string/modifiers/replace/replace_with_range.cc:
	Likewise.
	* testsuite/23_containers/vector/bool/cons/from_range.cc: Likewise.
	* testsuite/23_containers/vector/bool/modifiers/assign/assign_range.cc:
	Likewise.
	* testsuite/23_containers/vector/bool/modifiers/insert/insert_range.cc:
	Likewise.
	* testsuite/23_containers/vector/cons/from_range.cc: Likewise.
	* testsuite/23_containers/vector/modifiers/assign/assign_range.cc:
	Likewise.
	* testsuite/23_containers/vector/modifiers/insert/insert_range.cc:
	Likewise.
	* testsuite/23_containers/vector/bool/modifiers/insert/append_range.cc:
	Run full test_ranges instead of span-only in test_constexpr.
	* testsuite/23_containers/vector/modifiers/append_range.cc:
	Replace test_constexpr with calls to test_ranges and test_overlapping.
	* testsuite/util/testsuite_allocator.h (__gnu_test::SimpleAllocator):
	Declared member functions as constexpr.

2025-07-23  Luc Grosheintz  <luc.grosheintz@gmail.com>

	* testsuite/23_containers/mdspan/accessors/default.cc: Delete.
	* testsuite/23_containers/mdspan/accessors/generic.cc: Slightly
	generalize the test code previously in default.cc.

2025-07-23  Luc Grosheintz  <luc.grosheintz@gmail.com>

	* testsuite/23_containers/mdspan/extents/ctor_ints.cc: Remove
	superfluous parens.
	* testsuite/23_containers/mdspan/extents/ctor_shape.cc: Ditto.
	* testsuite/23_containers/mdspan/mdspan.cc: Ditto.

2025-07-23  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/119137
	* testsuite/23_containers/inplace_vector/access/elem.cc: Cover
	front and back methods and const calls.
	* testsuite/23_containers/inplace_vector/access/elem_neg.cc:
	Likewise.
	* testsuite/23_containers/inplace_vector/modifiers/erase_neg.cc:
	New test.
	* testsuite/23_containers/inplace_vector/modifiers/single_insert_neg.cc:
	New test.

2025-07-22  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/119137
	* testsuite/23_containers/inplace_vector/cons/from_range.cc: Run
	iterators and range test at compile-time.
	* testsuite/23_containers/inplace_vector/modifiers/assign.cc:
	Likewise.
	* testsuite/23_containers/inplace_vector/modifiers/multi_insert.cc:
	Likewise.
	* testsuite/util/testsuite_iterators.h (__gnu_test::BoundsContainer)
	(__gnu_test::OutputContainer, __gnu_test::WritableObject)
	(__gnu_test::output_iterator_wrapper, __gnu_test::input_iterator_wrapper)
	(__gnu_test::forward_iterator_wrapper)
	(__gnu_test::bidirectional_iterator_wrapper)
	(__gnu_test::random_access_iterator_wrapper)
	(__gnu_test::test_container): Add appropriate _GLIBCXXNN_CONSTEXPR
	macros to member functions.
	(__gnu_test::contiguous_iterator_wrapper)
	(__gnu_test::input_iterator_wrapper_rval)
	(__gnu_test::test_range, __gnu_test::test_range_nocopy)
	(__gnu_test::test_sized_range_sized_sent)
	(__gnu_test::test_sized_range): Add constexpr specifier to member
	functions.

2025-07-22  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/119137
	* include/std/inplace_vector (inplace_vector::assign_range):
	Replace _Nm with _M_size in the assigment loop.

2025-07-21  Luc Grosheintz  <luc.grosheintz@gmail.com>

	* include/std/mdspan (mdspan::mdspan): Make default ctor
	conditionally noexcept.
	* testsuite/23_containers/mdspan/mdspan.cc: Add tests.

2025-07-21  Luc Grosheintz  <luc.grosheintz@gmail.com>

	* include/std/mdspan (mdspan::is_always_unique): Make
	conditionally noexcept.
	(mdspan::is_always_exhaustive): Ditto.
	(mdspan::is_always_strided): Ditto.
	(mdspan::is_unique): Ditto.
	(mdspan::is_exhaustive): Ditto.
	(mdspan::is_strided): Ditto.
	* testsuite/23_containers/mdspan/layout_like.h: Make noexcept
	configurable. Add ThrowingLayout.
	* testsuite/23_containers/mdspan/mdspan.cc: Add tests for
	noexcept.

2025-07-20  Jakub Jelinek  <jakub@redhat.com>

	PR libstdc++/121174
	* src/c++23/std.cc.in (std::dextents): Export.  Add to FIXME comments
	other not yet implemented nor exported <mdspan> entities.

2025-07-18  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/stl_iterator_base_types.h (__any_input_iterator):
	Only define when __cpp_lib_concepts is defined.

2025-07-18  Jonathan Wakely  <jwakely@redhat.com>

	* doc/xml/manual/appendix_contributing.xml: Remove Paolo from
	list of maintainers to contact about contributing.
	* doc/html/manual/appendix_contributing.html: Regenerate.

2025-07-18  Jonathan Wakely  <jwakely@redhat.com>

	* doc/xml/manual/build_hacking.xml: Document that
	windows_zones-map.h is a generated file.
	* doc/html/manual/appendix_porting.html: Regenerate.

2025-07-18  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/119137
	* include/std/inplace_vector (inplace_vector::operator=):
	Qualify call to std::addressof.

2025-07-18  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/121154
	* include/bits/chrono_io.h (_ChronoSpec::_M_time_point): Remove.
	(_ChronoSpec::_M_needs_ok_check): Define
	(__formatter_chrono::_M_parse): Set _M_needs_ok_check.
	(__formatter_chrono::_M_check_ok): Check values also for debug mode,
	and return __string_view.
	(__formatter_chrono::_M_format_to): Handle results of _M_check_ok.
	(__formatter_chrono::_M_wi, __formatter_chrono::_M_a_A)
	(__formatter_chrono::_M_b_B, __formatter_chrono::_M_C_y_Y)
	(__formatter_chrono::_M_d_e, __formatter_chrono::_M_F):
	Removed handling of _M_debug.
	(__formatter_chrono::__M_m): Print zero unpadded in _M_debug mode.
	(__formatter_duration::_S_spec_for): Remove _M_time_point refernce.
	(__formatter_duration::_M_parse): Override _M_needs_ok_check.
	* testsuite/std/time/month/io.cc: Test for localized !ok() values.
	* testsuite/std/time/weekday/io.cc: Test for localized !ok() values.

2025-07-18  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/121150
	* testsuite/20_util/hash/int128.cc: Cast expected values to
	size_t.

2025-07-18  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/unicode.h (_Utf_iterator::operator--): Reorder
	conditions and update position after reading a code unit.
	(_Utf_iterator::_M_read_reverse): Define.
	(_Utf_iterator::_M_read_utf8): Return extracted code point.
	(_Utf_iterator::_M_read_reverse_utf8): Define.
	(_Utf_iterator::_M_read_reverse_utf16): Define.
	(_Utf_iterator::_M_read_reverse_utf32): Define.
	* testsuite/ext/unicode/view.cc: Add checks for reversed views
	and reverse iteration.

2025-07-18  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/unicode.h (_Utf_iterator): Reorder data members
	to be more compact.

2025-07-18  Jonathan Wakely  <jwakely@redhat.com>
	    Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/119137
	* doc/doxygen/user.cfg.in (INPUT): Add new header.
	* include/Makefile.am: Add new header.
	* include/Makefile.in: Regenerate.
	* include/bits/stl_iterator_base_types.h (__any_input_iterator):
	Define.
	* include/bits/version.def (inplace_vector): Define.
	* include/bits/version.h: Regenerate.
	* include/precompiled/stdc++.h: Include new header.
	* src/c++23/std.cc.in: Export contents if new header.
	* include/std/inplace_vector: New file.
	* testsuite/23_containers/inplace_vector/access/capacity.cc: New file.
	* testsuite/23_containers/inplace_vector/access/elem.cc: New file.
	* testsuite/23_containers/inplace_vector/access/elem_neg.cc: New file.
	* testsuite/23_containers/inplace_vector/cons/1.cc: New file.
	* testsuite/23_containers/inplace_vector/cons/from_range.cc: New file.
	* testsuite/23_containers/inplace_vector/cons/throws.cc: New file.
	* testsuite/23_containers/inplace_vector/copy.cc: New file.
	* testsuite/23_containers/inplace_vector/erasure.cc: New file.
	* testsuite/23_containers/inplace_vector/modifiers/assign.cc: New file.
	* testsuite/23_containers/inplace_vector/modifiers/erase.cc: New file.
	* testsuite/23_containers/inplace_vector/modifiers/multi_insert.cc:
	New file.
	* testsuite/23_containers/inplace_vector/modifiers/single_insert.cc:
	New file.
	* testsuite/23_containers/inplace_vector/move.cc: New file.
	* testsuite/23_containers/inplace_vector/relops.cc: New file.
	* testsuite/23_containers/inplace_vector/version.cc: New file.
	* testsuite/util/testsuite_iterators.h (input_iterator_wrapper::base):
	Define.

2025-07-17  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/96710
	* doc/xml/manual/evolution.xml: Document change or __int128.
	* doc/html/manual/api.html: Regenerate.

2025-07-17  Luc Grosheintz  <luc.grosheintz@gmail.com>

	PR libstdc++/121061
	* include/std/mdspan (extents::extents): Perform conversion to
	index_type of an r-value reference.
	(layout_left::mapping::operator()): Ditto.
	(layout_right::mapping::operator()): Ditto.
	(layout_stride::mapping::operator()): Ditto.
	* testsuite/23_containers/mdspan/extents/custom_integer.cc: Add
	tests for RValueInt and MutatingInt.
	* testsuite/23_containers/mdspan/int_like.h (RValueInt): Add.
	* testsuite/23_containers/mdspan/layouts/mapping.cc: Test with
	RValueInt.
	* testsuite/23_containers/mdspan/mdspan.cc: Ditto.

2025-07-17  Luc Grosheintz  <luc.grosheintz@gmail.com>

	PR libstdc++/121061
	* include/std/mdspan (extents::extents): Fix constraint to
	prevent non-const conversion to index_type.
	(layout_stride::mapping::mapping): Ditto.
	(mdspan::mdspan): Ditto.
	(mdspan::operator[]): Ditto.
	* testsuite/23_containers/mdspan/extents/custom_integer.cc: Add
	test for MutatingInt.
	* testsuite/23_containers/mdspan/int_like.h (MutatingInt): Add.
	* testsuite/23_containers/mdspan/layouts/mapping.cc: Add test for
	MutatingInt.
	* testsuite/23_containers/mdspan/layouts/stride.cc: Ditto.
	* testsuite/23_containers/mdspan/mdspan.cc: Ditto.

2025-07-17  Luc Grosheintz  <luc.grosheintz@gmail.com>

	PR libstdc++/121061
	* testsuite/23_containers/mdspan/extents/custom_integer.cc:
	Enable checking with different custom integers. Improve
	checking non-existence of overloads for incompatible custom
	integers.
	* testsuite/23_containers/mdspan/layouts/mapping.cc: ditto. Also
	improve reuse of int_like.h.
	* testsuite/23_containers/mdspan/layouts/stride.cc: ditto.
	* testsuite/23_containers/mdspan/mdspan.cc: ditto.
	* testsuite/23_containers/mdspan/extents/int_like.h: Rename (old
	name).
	* testsuite/23_containers/mdspan/int_like.h: Rename (new name).
	(ThrowingInt): Add.
	(NotIntLike): Add.

2025-07-17  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/unicode.h (__unicode::_Utf_iterator): Add
	comments.
	(__unicode:_Utf_iterator::operator++()): Check whether to
	iterate over the buffer first.

2025-07-17  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/121097
	* include/c_global/cmath (hypot): Use __promote_3 instead of
	__promoted.

2025-07-16  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/bitset (__bitset::__string) [__cpp_lib_bitset]:
	Change alias to refer to basic_string_view instead.

2025-07-16  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/121114
	* include/bits/version.def (constexpr_exceptions): Add no_stdname
	and changed value.
	* include/bits/version.h: Regenerated.
	* testsuite/18_support/exception/version.cc: Test that macro is
	not exported.

2025-07-15  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/move.h (swap): Replace enable_if with concepts
	when available, and with __enable_if_t alias otherwise.

2025-07-15  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/ranges_base.h (ranges::advance(i, n, bound)):
	Ensure that observable side effects on iterators match what is
	specified in the standard.

2025-07-15  Patrick Palka  <ppalka@redhat.com>

	PR libstdc++/119962
	* include/std/ranges (join_view::_Iterator::_M_outer): Initialize.
	(lazy_split_view::_OuterIter::_M_current): Initialize.
	(join_with_view::_Iterator::_M_outer_it): Initialize.
	* testsuite/std/ranges/adaptors/join.cc (test15): New test.
	* testsuite/std/ranges/adaptors/join_with/1.cc (test05): New test.
	* testsuite/std/ranges/adaptors/lazy_split.cc (test13): New test.

2025-07-15  Björn Schäpers  <bjoern@hazardy.de>

	PR libstdc++/108409
	* scripts/gen_windows_zones_map.py: New file, generates
	windows_zones-map.h.
	* src/c++20/windows_zones-map.h: New file, contains the look up
	table.
	* src/c++20/tzdb.cc (tzdb::current_zone): Add Windows code path.

2025-07-15  Björn Schäpers  <bjoern@hazardy.de>

	* src/c++20/tzdb.cc (zoneinfo_file): On Windows look relative
	from the DLL path for the time zone information.

2025-07-15  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/25_algorithms/copy/debug/constexpr_neg.cc:
	* testsuite/25_algorithms/copy_backward/debug/constexpr_neg.cc:
	* testsuite/25_algorithms/equal/debug/constexpr_neg.cc:
	* testsuite/25_algorithms/lower_bound/debug/constexpr_partitioned_neg.cc:
	* testsuite/25_algorithms/lower_bound/debug/constexpr_partitioned_pred_neg.cc:
	* testsuite/25_algorithms/lower_bound/debug/constexpr_valid_range_neg.cc:
	* testsuite/25_algorithms/upper_bound/debug/constexpr_partitioned_neg.cc:
	* testsuite/25_algorithms/upper_bound/debug/constexpr_partitioned_pred_neg.cc:
	* testsuite/25_algorithms/upper_bound/debug/constexpr_valid_range_neg.cc:

2025-07-15  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/121024
	* include/bits/ranges_uninitialized.h (ranges::destroy): Do not
	optimize away trivial destructors during constant evaluation.
	(ranges::destroy_n): Likewise.
	* testsuite/20_util/specialized_algorithms/destroy/121024.cc:
	New test.

2025-07-15  Jonathan Wakely  <jwakely@redhat.com>

	* include/experimental/memory (swap, make_observer_ptr): Add
	constexpr.
	(operator==, operator!=, operator<, operator>, operator<=)
	(operator>=): Likewise.
	* testsuite/experimental/memory/observer_ptr/make_observer.cc:
	Checks for constant evaluation.
	* testsuite/experimental/memory/observer_ptr/relops/relops.cc:
	Likewise.
	* testsuite/experimental/memory/observer_ptr/swap/swap.cc:
	Likewise.

2025-07-15  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/type_traits (__make_unsigned_selector): Add
	unsigned __int128 to type list.
	* testsuite/20_util/make_unsigned/int128.cc: New test.

2025-07-15  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/96710
	* include/bits/functional_hash.h (hash<__int128>): Define for
	strict modes.
	(hash<unsigned __int128>): Likewise.
	* testsuite/20_util/hash/int128.cc: New test.

2025-07-15  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/110739
	* include/bits/chrono_io.h (__formatter_chrono::_S_weekdays)
	(__formatter_chrono::_S_months, __formatter_chrono::_S_fill_ampm):
	Define.
	(__formatter_chrono::_M_format_to): Do not pass context parameter
	to functions listed below.
	(__formatter_chrono::_M_a_A, __formatter_chrono::_M_b_B): Implement
	using harcoded list of names, and remove format context parameter.
	(__formatter_chrono::_M_p, __formatter_chrono::_M_r): Implement
	using _S_fill_ampm.
	(__formatter_chrono::_M_c): Removed format context parameter.
	(__formatter_chrono::_M_subsecs): Call __ctx.locale() directly,
	instead of _M_locale and do not compare with locale::classic().
	Add [[unlikely]] attributes.
	(__formatter_chrono::_M_locale): Move to __formatter_duration.
	(__formatter_duration::_M_locale): Moved from __formatter_chrono.

2025-07-14  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/stl_pair.h (swap): Add comment to deleted
	overload.
	* include/bits/unique_ptr.h (swap): Likewise.
	* include/std/array (swap): Likewise.
	* include/std/optional (swap): Likewise.
	* include/std/tuple (swap): Likewise.
	* include/std/variant (swap): Likewise.
	* testsuite/23_containers/array/tuple_interface/get_neg.cc:
	Adjust dg-error line numbers.

2025-07-14  Jonathan Wakely  <jwakely@redhat.com>

	* include/pstl/algorithm_impl.h (__for_each_n_it_serial):
	Protect against overloaded comma operator.
	(__brick_walk2): Likewise.
	(__brick_walk2_n): Likewise.
	(__brick_walk3): Likewise.
	(__brick_move_destroy::operator()): Likewise.
	(__brick_calc_mask_1): Likewise.
	(__brick_copy_by_mask): Likewise.
	(__brick_partition_by_mask): Likewise.
	(__brick_calc_mask_2): Likewise.
	(__brick_reverse): Likewise.
	(__pattern_partial_sort_copy): Likewise.
	* include/pstl/memory_impl.h (__brick_uninitialized_move):
	Likewise.
	(__brick_uninitialized_copy): Likewise.
	* include/pstl/numeric_impl.h (__brick_transform_scan):
	Likewise.

2025-07-14  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/117785
	* include/bits/version.def (constexpr_exceptions): Define
	correct value.
	* include/bits/version.h: Regenerate.
	* libsupc++/exception: Check correct value.
	* testsuite/18_support/exception/version.cc: New test.

2025-07-14  Jonathan Wakely  <jwakely@redhat.com>

	* libsupc++/exception_ptr.h (make_exception_ptr): Return null
	for consteval when -fno-exceptions is used.
	(exception_ptr_cast): Likewise. Allow consteval path to work
	with -fno-rtti.

2025-07-11  Jakub Jelinek  <jakub@redhat.com>

	* libsupc++/exception_ptr.h: Implement C++26 P3748R0 - Inspecting
	exception_ptr should be constexpr.
	(std::exception_ptr_cast): Make constexpr, remove inline keyword.  Add
	static_asserts for Mandates.  For if consteval use std::rethrow_exception,
	catch it and return its address or nullptr.
	* testsuite/18_support/exception_ptr/exception_ptr_cast.cc (E::~E): Add
	constexpr.
	(G::G): Likewise.
	(test01): Likewise.  Return bool and take bool argument, throw if the
	argument is true.  Add static_assert(test01(false)).
	(main): Call test01(true) in try.

2025-07-11  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/cpp_type_traits.h (__is_floating<__float128>):
	Do not depend on __STRICT_ANSI__.
	* include/bits/stl_algobase.h (__size_to_integer(__float128)):
	Likewise.
	* include/std/type_traits (__is_floating_point_helper<__float128>):
	Likewise.

2025-07-11  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/96710
	* include/bits/cpp_type_traits.h (__is_integer): Define explicit
	specializations for __int128.
	(__memcpyable_integer): Remove explicit specializations for
	__int128.
	* include/bits/iterator_concepts.h (incrementable_traits):
	Likewise.
	(__is_signed_int128, __is_unsigned_int128, __is_int128): Remove.
	(__is_integer_like, __is_signed_integer_like): Remove check for
	__int128.
	* include/bits/max_size_type.h: Remove all uses of __is_int128
	in constraints.
	* include/bits/ranges_base.h (__to_unsigned_like): Remove
	overloads for __int128.
	(ranges::ssize): Remove special case for __int128.
	* include/bits/stl_algobase.h (__size_to_integer): Define
	__int128 overloads for strict modes.
	* include/ext/numeric_traits.h (__is_integer_nonstrict): Remove
	explicit specializations for __int128.
	* include/std/charconv (to_chars): Define overloads for
	__int128.
	* include/std/format (__format::make_unsigned_t): Remove.
	(__format::to_chars): Remove.
	* include/std/limits (numeric_limits): Define explicit
	specializations for __int128.
	* include/std/type_traits (__is_integral_helper): Likewise.
	(__make_unsigned, __make_signed): Likewise.

2025-07-10  Jakub Jelinek  <jakub@redhat.com>

	PR c++/117785
	* include/bits/version.def (constexpr_exceptions): New.
	* include/bits/version.h: Regenerate.
	* libsupc++/exception (std::bad_exception::bad_exception): Add
	_GLIBCXX26_CONSTEXPR.
	(std::bad_exception::~bad_exception, std::bad_exception::what): For
	C++26 add constexpr and define inline.
	* libsupc++/exception.h (std::exception::exception,
	std::exception::operator=): Add _GLIBCXX26_CONSTEXPR.
	(std::exception::~exception, std::exception::what): For C++26 add
	constexpr and define inline.
	* libsupc++/exception_ptr.h (std::make_exception_ptr): Add
	_GLIBCXX26_CONSTEXPR.  For if consteval use just throw with
	current_exception() in catch.
	(std::exception_ptr::exception_ptr(void*)): For C++26 add constexpr
	and define inline.
	(std::exception_ptr::exception_ptr()): Add _GLIBCXX26_CONSTEXPR.
	(std::exception_ptr::exception_ptr(const exception_ptr&)): Likewise.
	Use __builtin_eh_ptr_adjust_ref if consteval and compiler has it
	instead of _M_addref.
	(std::exception_ptr::exception_ptr(nullptr_t)): Add
	_GLIBCXX26_CONSTEXPR.
	(std::exception_ptr::exception_ptr(exception_ptr&&)): Likewise.
	(std::exception_ptr::operator=): Likewise.
	(std::exception_ptr::~exception_ptr): Likewise.  Use
	__builtin_eh_ptr_adjust_ref if consteval and compiler has it
	instead of _M_release.
	(std::exception_ptr::swap): Add _GLIBCXX26_CONSTEXPR.
	(std::exception_ptr::operator bool): Likewise.
	(std::exception_ptr::operator==): Likewise.
	* libsupc++/nested_exception.h
	(std::nested_exception::nested_exception): Add _GLIBCXX26_CONSTEXPR.
	(std::nested_exception::operator=): Likewise.
	(std::nested_exception::~nested_exception): For C++26 add constexpr
	and define inline.
	(std::nested_exception::rethrow_if_nested): Add _GLIBCXX26_CONSTEXPR.
	(std::nested_exception::nested_ptr): Likewise.
	(std::_Nested_exception::_Nested_exception): Likewise.
	(std::throw_with_nested, std::rethrow_if_nested): Likewise.
	* libsupc++/new (std::bad_alloc::bad_alloc): Likewise.
	(std::bad_alloc::operator=): Likewise.
	(std::bad_alloc::~bad_alloc): For C++26 add constexpr and define
	inline.
	(std::bad_alloc::what): Likewise.
	(std::bad_array_new_length::bad_array_new_length): Add
	_GLIBCXX26_CONSTEXPR.
	(std::bad_array_new_length::~bad_array_new_length): For C++26 add
	constexpr and define inline.
	(std::bad_array_new_length::what): Likewise.
	* libsupc++/typeinfo (std::bad_cast::bad_cast): Add
	_GLIBCXX26_CONSTEXPR.
	(std::bad_cast::~bad_cast): For C++26 add constexpr and define inline.
	(std::bad_cast::what): Likewise.
	(std::bad_typeid::bad_typeid): Add _GLIBCXX26_CONSTEXPR.
	(std::bad_typeid::~bad_typeid): For C++26 add constexpr and define
	inline.
	(std::bad_typeid::what): Likewise.

2025-07-10  Jakub Jelinek  <jakub@redhat.com>

	* testsuite/22_locale/codecvt/codecvt_unicode.h
	(ucs2_to_utf8_out_error): Comment spelling fix: bellow -> below.
	(utf16_to_ucs2_in_error): Likewise.

2025-07-09  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/stl_uninitialized.h (__uninitialized_default):
	Do not use optimized implementation for constexpr case. Use
	_GLIBCXX20_CONSTEXPR instead of _GLIBCXX26_CONSTEXPR.

2025-07-09  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/mdspan (mdspan): Add template keyword for
	dependent name.

2025-07-09  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/120997
	* include/std/span (span::first, span::last, span::subspan): Do
	not use braced-init-list for return statements.
	* testsuite/23_containers/span/120997.cc: New test.

2025-07-09  Paul Keir  <pkeir@outlook.com>

	PR libstdc++/117403
	* include/bits/shared_ptr.h (shared_ptr::owner_equal)
	(shared_ptr::owner_hash, weak_ptr::owner_equal)
	(weak_ptr::owner_hash): Define new member functions.
	* include/bits/shared_ptr_base.h (owner_equal, owner_hash):
	Define new structs.
	* include/bits/version.def (smart_ptr_owner_equality): Define.
	* include/bits/version.h: Regenerate.
	* include/std/memory: Added define for
	__glibcxx_want_smart_ptr_owner_equality.
	* testsuite/20_util/owner_equal/version.cc: New test.
	* testsuite/20_util/owner_equal/cmp.cc: New test.
	* testsuite/20_util/owner_equal/noexcept.cc: New test.
	* testsuite/20_util/owner_hash/cmp.cc: New test.
	* testsuite/20_util/owner_hash/noexcept.cc: New test.
	* testsuite/20_util/shared_ptr/observers/owner_equal.cc: New
	test.
	* testsuite/20_util/shared_ptr/observers/owner_hash.cc:
	New test.
	* testsuite/20_util/weak_ptr/observers/owner_equal.cc: New test.
	* testsuite/20_util/weak_ptr/observers/owner_hash.cc: New test.

2025-07-09  Mateusz Zych  <mte.zych@gmail.com>

	* include/bits/max_size_type.h (numeric_limits<__max_size_type>):
	New members.
	(numeric_limits<__max_diff_type>): Likewise.
	* testsuite/std/ranges/iota/max_size_type.cc: New test cases.

2025-07-09  Jonathan Wakely  <jwakely@redhat.com>

	* src/c++17/memory_resource.cc: Adjust indentation of unnamed
	namespaces.
	(pool_sizes): Add comment.
	(choose_block_size): Move outside preprocessor group for
	gthreads targets.
	* testsuite/20_util/synchronized_pool_resource/118681.cc:
	Require gthreads.

2025-07-09  H.J. Lu  <hjl.tools@gmail.com>

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

2025-07-08  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/118681
	* testsuite/20_util/unsynchronized_pool_resource/118681.cc: Fix
	deallocate argument.

2025-07-08  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/118681
	* src/c++17/memory_resource.cc (choose_block_size): New
	function.
	(synchronized_pool_resource::do_allocate): Use choose_block_size
	to determine appropriate block size.
	(synchronized_pool_resource::do_deallocate): Likewise
	(unsynchronized_pool_resource::do_allocate): Likewise.
	(unsynchronized_pool_resource::do_deallocate): Likewise
	* testsuite/20_util/synchronized_pool_resource/118681.cc: New
	test.
	* testsuite/20_util/unsynchronized_pool_resource/118681.cc: New
	test.

2025-07-08  Jonathan Wakely  <jwakely@redhat.com>

	* include/debug/forward_list (_Safe_forward_list<>::_M_swap):
	Adapt to _M_this() signature change.

2025-07-08  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/119861
	* include/std/format (formatter<_Rg, _CharT>::set_separator)
	(formatter<_Rg, _CharT>::set_brackets): Constrain with
	(format_kind<_Rg> == range_format::sequence).
	* testsuite/std/format/ranges/pr119861_neg.cc: New test.

2025-07-08  Luc Grosheintz  <luc.grosheintz@gmail.com>

	PR libstdc++/120914
	* include/std/span (span): Update CTAD to enable
	integral constants [P3029R1].
	* include/std/mdspan (extents): ditto.
	(mdspan): ditto.
	* testsuite/23_containers/span/deduction.cc: Test deduction
	guide.
	* testsuite/23_containers/mdspan/extents/misc.cc: ditto.
	* testsuite/23_containers/mdspan/mdspan.cc: ditto.

2025-07-08  Luc Grosheintz  <luc.grosheintz@gmail.com>

	* testsuite/23_containers/span/contiguous_range_neg.cc: Silence
	warning about unused variable myspan.

2025-07-08  Luc Grosheintz  <luc.grosheintz@gmail.com>

	PR libstdc++/107761
	* include/bits/version.def (mdspan): Set to 202207 and remove
	no_stdname.
	* include/bits/version.h: Regenerate.
	* testsuite/23_containers/mdspan/version.cc: Test presence
	of feature test macro.

2025-07-08  Luc Grosheintz  <luc.grosheintz@gmail.com>

	PR libstdc++/107761
	* include/std/mdspan (mdspan): New class.
	* src/c++23/std.cc.in (mdspan): Add.
	* testsuite/23_containers/mdspan/class_mandate_neg.cc: New test.
	* testsuite/23_containers/mdspan/mdspan.cc: New test.
	* testsuite/23_containers/mdspan/layout_like.h: Add class
	LayoutLike which models a user-defined layout.
	* testsuite/23_containers/mdspan/out_of_bounds_neg.cc: New file.

2025-07-08  Luc Grosheintz  <luc.grosheintz@gmail.com>

	* include/std/mdspan (__mdspan::__size): New function.

2025-07-08  Luc Grosheintz  <luc.grosheintz@gmail.com>

	* testsuite/23_containers/mdspan/extents/custom_integer.cc:
	Delete IntLike and include "int_like.h".
	* testsuite/23_containers/mdspan/extents/int_like.h: Add
	IntLike.

2025-07-08  Luc Grosheintz  <luc.grosheintz@gmail.com>

	* include/std/mdspan (extents): Check prerequisite of the ctor that
	static_extent(i) == dynamic_extent || extent(i) == other.extent(i).
	* testsuite/23_containers/mdspan/extents/class_mandates_neg.cc:
	Test the implemented prerequisite.
	* testsuite/23_containers/mdspan/extents/extents_mismatch_neg.cc: New file.

2025-07-08  Luc Grosheintz  <luc.grosheintz@gmail.com>

	* include/std/mdspan: Check prerequisites of
	layout_*::operator() with _GLIBCXX_DEBUG_ASSERTs.
	* testsuite/23_containers/mdspan/layouts/debug/out_of_bounds_neg.cc:
	Add tests for prerequisites.

2025-07-08  Tomasz Kamiński  <tkaminsk@redhat.com>

	* include/std/queue (formatter<queue<_Tp, _Container>, _CharT>)
	(formatter<priority_queue<_Tp, _Container, _Compare>, _CharT>):
	Add _GLIBCXX_RESOLVE_LIB_DEFECTS comments.

2025-07-08  François Dumont  <frs.dumont@gmail.com>

	PR c++/116369
	* config/abi/pre/gnu-versioned-namespace.ver: Use new const qualified symbols.
	* config/abi/pre/gnu.ver: Add new const qualified symbols.
	* include/debug/safe_base.h
	(_Safe_iterator_base::_M_sequence): Declare as pointer-to-const.
	(_Safe_iterator_base::_M_attach, _M_attach_single): New, take pointer-to-const
	_Safe_sequence_base.
	(_Safe_sequence_base::_M_detach_all, _M_detach_singular, _M_revalidate_singular)
	(_M_swap, _M_get_mutex): New, const qualified.
	(_Safe_sequence_base::_M_attach, _M_attach_single, _M_detach, _M_detach_single):
	const qualify.
	* include/debug/safe_container.h (_Safe_container<>::_M_cont): Add const qualifier.
	(_Safe_container<>::_M_swap_base): New.
	(_Safe_container(_Safe_container&&, const _Alloc&, std::false_type)):
	Adapt to use latter.
	(_Safe_container<>::operator=(_Safe_container&&)): Likewise.
	(_Safe_container<>::_M_swap): Likewise and take parameter as const reference.
	* include/debug/safe_unordered_base.h
	(_Safe_local_iterator_base::_M_safe_container): New.
	(_Safe_local_iterator_base::_Safe_local_iterator_base): Take
	_Safe_unordered_container_base as pointer-to-const.
	(_Safe_unordered_container_base::_M_attach, _M_attach_single): New, take
	container as _Safe_unordered_container_base pointer-to-const.
	(_Safe_unordered_container_base::_M_local_iterators, _M_const_local_iterators):
	Add mutable.
	(_Safe_unordered_container_base::_M_detach_all, _M_swap): New, const qualify.
	(_Safe_unordered_container_base::_M_attach_local, _M_attach_local_single)
	(_M_detach_local, _M_detach_local_single): Add const qualifier.
	* include/debug/safe_unordered_container.h (_Safe_unordered_container::_M_self()): New.
	* include/debug/safe_unordered_container.tcc
	(_Safe_unordered_container::_M_invalidate_if, _M_invalidated_local_if): Use latter.
	* include/debug/safe_iterator.h (_Safe_iterator<>::_M_attach, _M_attach_single):
	Take _Safe_sequence_base as pointer-to-const.
	(_Safe_iterator<>::_M_get_sequence): Add const_cast and comment about it.
	* include/debug/safe_local_iterator.h (_Safe_local_iterator<>): Replace usages
	of _M_sequence member by _M_safe_container().
	(_Safe_local_iterator<>::_M_attach, _M_attach_single): Take
	_Safe_unordered_container_base as pointer-to-const.
	(_Safe_local_iterator<>::_M_get_sequence): Rename into...
	(_Safe_local_iterator<>::_M_get_ucontainer): ...this. Add necessary const_cast and
	comment to explain it.
	(_Safe_local_iterator<>::_M_is_begin, _M_is_end): Adapt.
	* include/debug/safe_local_iterator.tcc: Adapt.
	* include/debug/safe_sequence.h
	(_Safe_sequence<>::_M_invalidate_if, _M_transfer_from_if): Add const qualifier.
	* include/debug/safe_sequence.tcc: Adapt.
	* include/debug/deque (std::__debug::deque::erase): Adapt to use new const
	qualified methods.
	* include/debug/formatter.h: Adapt.
	* include/debug/forward_list (_Safe_forward_list::_M_this): Add const
	qualification and return pointer for consistency with 'this' keyword.
	(_Safe_forward_list::_M_swap_aux): Rename into...
	(_Safe_forward_list::_S_swap_aux): ...this and take sequence as const reference.
	(forward_list<>::resize): Adapt to use const methods.
	* include/debug/list (list<>::resize): Likewise.
	* src/c++11/debug.cc: Adapt to const qualification.
	* testsuite/util/testsuite_containers.h
	(forward_members_unordered::forward_members_unordered): Add check on local_iterator
	conversion to const_local_iterator.
	(forward_members::forward_members): Add check on iterator conversion to
	const_iterator.
	* testsuite/23_containers/unordered_map/const_container.cc: New test case.
	* testsuite/23_containers/unordered_multimap/const_container.cc: New test case.
	* testsuite/23_containers/unordered_multiset/const_container.cc: New test case.
	* testsuite/23_containers/unordered_set/const_container.cc: New test case.
	* testsuite/23_containers/vector/debug/mutex_association.cc: Adapt.

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

	PR libstdc++/120949
	* include/bits/stl_iterator.h (__normal_iterator): Fix order of
	always_inline and nodiscard attributes for Clang compatibility.

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

	* testsuite/util/testsuite_hooks.h (VERIFY): Define as variadic
	macro.
	* testsuite/ext/verify_neg.cc: New test.

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

	* include/std/mdspan (__mapping_of): Add template keyword.

2025-07-07  XU Kailiang  <xu2k3l4@outlook.com>
	    Tomasz Kaminski  <tkaminsk@redhat.com>

	PR libstdc++/117214
	* include/bits/chrono_io.h (_ChronoSpec::_M_time_only): Remove.
	(_ChronoSpec::_M_time_point): Define.
	(__formatter_chrono::_M_parse): Use __parts to determine
	interpretation of j.
	(__formatter_chrono::_M_check_ok): Define.
	(__formatter_chrono::_M_format_to): Invoke _M_check_ok.
	(__formatter_chrono::_M_a_A, __formatter_chrono::_M_b_B): Move
	exception throwing to _M_check_ok.
	(__formatter_chrono::_M_j): Use _M_needs to define interpretation.
	(__formatter_duration::_S_spec_for): Set _M_time_point.
	* testsuite/std/time/format/format.cc: Test for exception for !ok()
	months/weekday.
	* testsuite/std/time/format/pr117214_custom_timeput.cc: New
	test.

2025-07-07  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/120976
	* include/std/format (formatter<__float128, _Char_T): Define if
	_GLIBCXX_FORMAT_F128 == 2.

2025-07-06  Patrick Palka  <ppalka@redhat.com>

	* include/bits/ranges_algo.h (shift_left, shift_right): Guard
	with __glibcxx_shift >= 201806L.
	(ranges::__shift_left_fn, ranges::shift_left): Define for C++23.
	(ranges::__shift_right_fn, ranges::shift_right): Likewise.
	* include/bits/version.def (shift): Update for C++23.
	* include/bits/version.h: Regenerate.
	* src/c++23/std.cc.in: Add ranges::shift_left/right.
	* testsuite/25_algorithms/shift_left/constrained.cc: New test,
	based off of 1.cc.
	* testsuite/25_algorithms/shift_right/constrained.cc: New test,
	based off of 1.cc.

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

	* include/bits/chrono_io.h (__formatter_duration::_S_spec_for):
	Add default case to switch and use __builtin_unreachable.

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

	* include/bits/stl_algobase.h (__size_to_integer): Move
	misplaced unsigned keyword on __size_to_integer overloads for
	__GLIBCXX_TYPE_INT_N_3 integer type.

2025-07-03  Nathan Myers  <ncm@cantrip.org>

	* include/bits/version.def: Fix typo.
	* include/bits/version.h: Rebuilt.

2025-07-03  Patrick Palka  <ppalka@redhat.com>

	PR libstdc++/120934
	* include/std/ranges (concat_view::end): Refine condition
	for returning an iterator instead of default_sentinel as
	per the updated P/R for LWG 4166.
	* testsuite/std/ranges/concat/1.cc (test05): New test.

2025-07-03  Nathan Myers  <ncm@cantrip.org>

	PR libstdc++/119742
	* include/bits/version.def: Add preprocessor symbol.
	* include/bits/version.h: Add preprocessor symbol.
	* include/std/bitset: Add constructor.
	* testsuite/20_util/bitset/cons/1.cc: Fix.
	* testsuite/20_util/bitset/cons/6282.cc: Fix.
	* testsuite/20_util/bitset/cons/string_view.cc: Test new ctor.
	* testsuite/20_util/bitset/cons/string_view_wide.cc: Test new ctor.

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

	PR libstdc++/120931
	* include/bits/stl_uninitialized.h (__uninitialized_fill<true>):
	Fix typo resulting in call to __do_uninit_copy instead of
	__do_uninit_fill.
	* testsuite/20_util/specialized_algorithms/uninitialized_fill/120931.cc:
	New test.

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

	* include/bits/stl_iterator.h (__normal_iterator): Make all
	non-member operators hidden friends, except ...
	(operator<=>(__normal_iterator<I,C>, __normal_iterator<I,C>)):
	Remove.
	* src/c++11/string-inst.cc: Remove explicit instantiations of
	operators that are no longer templates.
	* src/c++23/std.cc.in (__gnu_cxx): Do not export operators for
	__normal_iterator.

2025-07-02  Nathan Myers  <ncm@cantrip.org>

	PR libstdc++/119744
	* include/std/ranges: View ctors become explicit.

2025-07-01  Patrick Palka  <ppalka@redhat.com>

	PR libstdc++/120789
	* include/bits/ranges_algo.h (__remove_if_fn::operator()): Use
	ranges::iter_move(iter) instead of std::move(*iter).
	* testsuite/25_algorithms/remove_if/120789.cc: New test.

2025-07-01  Patrick Palka  <ppalka@redhat.com>

	PR libstdc++/120789
	* include/bits/ranges_algo.h (__unique_fn::operator()): Use
	ranges::iter_move(iter) instead of std::move(*iter).
	* testsuite/25_algorithms/unique/120789.cc: New test.

2025-07-01  Luc Grosheintz  <luc.grosheintz@gmail.com>

	* include/std/mdspan (default_accessor): New class.
	* src/c++23/std.cc.in: Register default_accessor.
	* testsuite/23_containers/mdspan/accessors/default.cc: New test.
	* testsuite/23_containers/mdspan/accessors/default_neg.cc: New test.

2025-06-27  Patrick Palka  <ppalka@redhat.com>

	PR libstdc++/100795
	* include/bits/ranges_algo.h (shuffle_fn::operator()):
	Reimplement directly, based on the stl_algo.h implementation.
	* testsuite/25_algorithms/shuffle/constrained.cc (test02):
	New test.

2025-06-27  Patrick Palka  <ppalka@redhat.com>

	PR libstdc++/100795
	* include/bits/ranges_algo.h (__sample_fn::operator()):
	Reimplement the forward_iterator branch directly, based
	on the stl_algo.h implementation.  Add explicit cast to
	_Out's difference_type in the !forward_iterator branch.
	* testsuite/25_algorithms/sample/constrained.cc (test02):
	New test.

2025-06-27  Patrick Palka  <ppalka@redhat.com>

	PR libstdc++/100795
	* include/bits/ranges_algo.h (__detail::__introselect): New,
	based on the stl_algo.h implementation.
	(nth_element_fn::operator()): Reimplement in terms of the above.
	* testsuite/25_algorithms/nth_element/constrained.cc:

2025-06-27  Patrick Palka  <ppalka@redhat.com>

	PR libstdc++/100795
	* include/bits/ranges_algo.h (__detail::__find_if_not_n): New,
	based on the stl_algo.h implementation.
	(__detail::__stable_partition_adaptive): Likewise.
	(__stable_partition_fn::operator()): Reimplement in terms of
	the above.
	* testsuite/25_algorithms/stable_partition/constrained.cc
	(test03): New test.

2025-06-27  Patrick Palka  <ppalka@redhat.com>

	PR libstdc++/100795
	* include/bits/ranges_algo.h (__detail::__move_merge): New,
	based on the stl_algo.h implementation.
	(__detail::__merge_sort_loop): Likewise.
	(__detail::__chunk_insertion_sort): Likewise.
	(__detail::__merge_sort_with_buffer): Likewise.
	(__detail::__stable_sort_adaptive): Likewise.
	(__detail::__stable_sort_adaptive_resize): Likewise.
	(__detail::__inplace_stable_sort): Likewise.
	(__stable_sort_fn::operator()): Reimplement in terms of the above.
	* testsuite/25_algorithms/stable_sort/constrained.cc:

2025-06-27  Patrick Palka  <ppalka@redhat.com>

	PR libstdc++/100795
	* include/bits/ranges_algo.h (__detail::__move_merge_adaptive):
	New, based on the stl_algo.h implementation.
	(__detail::__move_merge_adaptive_backward): Likewise.
	(__detail::__rotate_adaptive): Likewise.
	(__detail::__merge_adaptive): Likewise.
	(__detail::__merge_adaptive_resize): Likewise.
	(__detail::__merge_without_buffer): Likewise.
	(__inplace_merge_fn::operator()): Reimplement in terms of the
	above.
	* testsuite/25_algorithms/inplace_merge/constrained.cc (test03):
	New test.

2025-06-27  Patrick Palka  <ppalka@redhat.com>

	PR libstdc++/100795
	PR libstdc++/118209
	* include/bits/max_size_type.h (__bit_width): New explicit
	specialization for __max_size_type.
	* include/bits/ranges_algo.h (__detail::__move_median_to_first):
	New, based on the stl_algo.h implementation.
	(__detail::__unguarded_liner_insert): Likewise.
	(__detail::__insertion_sort): Likewise.
	(__detail::__sort_threshold): Likewise.
	(__detail::__unguarded_insertion_sort): Likewise.
	(__detail::__final_insertion_sort): Likewise.
	(__detail::__unguarded_partition): Likewise.
	(__detail::__unguarded_partition_pivot): Likewise.
	(__detail::__heap_select): Likewise.
	(__detail::__partial_sort): Likewise.
	(__detail::__introsort_loop): Likewise.
	(__sort_fn::operator()): Reimplement in terms of the above.
	* testsuite/25_algorithms/sort/118209.cc: New test.
	* testsuite/25_algorithms/sort/constrained.cc (test03): New test.

2025-06-27  Patrick Palka  <ppalka@redhat.com>

	PR libstdc++/100795
	* include/bits/ranges_algo.h (__detail::__push_heap): New,
	based on the stl_heap.h implementation.
	(__push_heap_fn::operator()): Reimplement in terms of the above.
	(__detail::__adjust_heap): New, based on the stl_heap.h
	implementation.
	(__deatil::__pop_heap): Likewise.
	(__pop_heap_fn::operator()): Reimplement in terms of the above.
	(__make_heap_fn::operator()): Likewise.
	(__sort_heap_fn::operator()): Likewise.
	* testsuite/25_algorithms/heap/constrained.cc (test03): New
	test.

2025-06-27  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/110739
	* include/bits/chrono_io.h (__formatter_chrono::_S_empty_fs): Define.
	(__formatter_chrono::_S_str_d2): Use _S_str_d3 for 3+ digits and
	place allways_inline attribute after comment.
	(__formatter_chrono::_S_str_d3): Extracted from _S_str_d2.
	(__formatter_chrono::_M_H_I, __formatter_chrono::_M_R_X): Replace
	_S_empty_spec with _S_empty_fs().
	(__formatter_chrono::_M_j): Likewise and use _S_str_d3 in common
	case.
	(__format::operator-(_ChronoParts, _ChronoParts))
	(__format::operator-=(_ChronoParts, _ChronoParts))
	(__formatter_chrono::_S_fill_two_digits)
	(__formatter_chrono::_S_str_d1): Place always_inline attribute
	after comment.

2025-06-27  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/110739
	* include/bits/chrono_io.h (__formatter_chrono::_M_format_to):
	Rename _Out to _OutIter for consistency, and update calls
	to specifier functions.
	(__formatter_chrono::_M_wi, __formatter_chrono::_M_C_y_Y)
	(__formatter_chrono::_M_D_x, __formatter_chrono::_M_d_e)
	(__formatter_chrono::_M_F, __formatter_chrono::_M_g_G)
	(__formatter_chrono::_M_H_I, __formatter_chrono::_M_j)
	(__formatter_chrono::_M_m, __formatter_chrono::_M_M)
	(__formatter_chrono::_M_q, __formatter_chrono::_M_R_X)
	(__formatter_chrono::_M_u_w, __formatter_chrono::_M_U_V_W)
	(__formatter_chrono::_M_z, __formatter_chrono::_M_z):
	Remove _FormatContext parameter, and  introduce _OutIter
	for __out type.
	(__formatter_chrono::_M_a_A, __formatter_chrono::_M_B_b)
	(__formatter_chrono::_M_p, __formatter_chrono::_M_Q)
	(__formatter_chrono::_M_r, __formatter_chrono::_M_S)
	(__formatter_chrono::_M_subsecs, __formatter_chrono::_M_T):
	Introduce separate _OutIter template parameter for __out.
	(__formatter_chrono::_M_c, __formatter_chrono::_M_T):
	Likewise, and adjust calls to specifiers functions.
	* testsuite/std/time/format/empty_spec.cc: Make underlying
	type for Rep configurable.

2025-06-27  Iain Sandoe  <iain@sandoe.co.uk>

	* config/abi/pre/gnu.ver: Keep the closing brace of the
	CXXABI_1.3.17 symbol group together with the identifier
	for the inherited group.

2025-06-26  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/110739
	* include/bits/chrono_io.h (__formatter_chrono::_M_use_locale_fmt):
	Define.
	(__formatter_chrono::_M_locale_fmt): Moved to front of the class.
	(__formatter_chrono::_M_format_to): Construct and initialize
	struct tm and call _M_locale_fmt if needed.
	(__formatter_chrono::_M_c_r_x_X): Split into separate methods.
	(__formatter_chrono::_M_c, __formatter_chrono::_M_r): Define.
	(__formatter_chrono::_M_D): Renamed to _M_D_x.
	(__formatter_chrono::_M_D_x): Renamed from _M_D.
	(__formatter_chrono::_M_R_T): Split into _M_R_X and _M_T.
	(__formatter_chrono::_M_R_X): Extracted from _M_R_T.
	(__formatter_chrono::_M_T): Define in terms of _M_R_X and _M_subsecs.
	(__formatter_chrono::_M_subsecs): Extracted from _M_S.
	(__formatter_chrono::_M_S): Replaced __mod with __subs argument,
	removed _M_locale_fmt call, and delegate to _M_subsecs.
	(__formatter_chrono::_M_C_y_Y, __formatter_chrono::_M_d_e)
	(__formatter_chrono::_M_H_I, __formatter_chrono::_M_m)
	(__formatter_chrono::_M_u_w, __formatter_chrono::_M_U_V_W): Remove
	__mod argument and call to _M_locale_fmt.

2025-06-26  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/110739
	* include/bits/chrono_io.h (__format::__no_timezone_available):
	Removed, replaced with separate throws in formatter for
	__local_time_fmt
	(__format::_ChronoParts): Defined additional enumertors and
	declared as enum class.
	(__format::operator&(_ChronoParts, _ChronoParts))
	(__format::operator&=(_ChronoParts&, _ChronoParts))
	(__format::operator-(_ChronoParts, _ChronoParts))
	(__format::operator-=(_ChronoParts&, _ChronoParts))
	(__format::operator==(_ChronoParts, decltype(nullptr)))
	(_ChronoSpec::_M_time_only, _ChronoSpec::_M_floating_point_rep)
	(_ChronoSpec::_M_custom_rep, _ChronoSpec::_M_needed)
	(_ChronoSpec::_M_needs, __format::_ChronoData): Define.
	(__format::__formatter_chrono): Redefine to accept _ChronoData.
	(__formatter_chrono::_M_format_to_ostream): Moved to
	__formatter_duration.
	(__format::__formatter_duration): Define.
	(__formatter_chrono_info::format): Pass value-constructed
	_ChronoData.
	(std::formatter<chrono::day, _CharT>)
	(std::formatter<chrono::month, _CharT>)
	(std::formatter<chrono::year, _CharT>)
	(std::formatter<chrono::weekday, _CharT>)
	(std::formatter<chrono::weekday_indexed, _CharT>)
	(std::formatter<chrono::weekday_last, _CharT>)
	(std::formatter<chrono::month_day, _CharT>)
	(std::formatter<chrono::month_day_last, _CharT>)
	(std::formatter<chrono::month_weekday, _CharT>)
	(std::formatter<chrono::month_weekday_indexed, _CharT>)
	(std::formatter<chrono::month_weekday_last, _CharT>)
	(std::formatter<chrono::year_month, _CharT>)
	(std::formatter<chrono::year_month_day, _CharT>)
	(std::formatter<chrono::year_month_day_last, _CharT>)
	(std::formatter<chrono::year_month_weekday, _CharT>)
	(std::formatter<chrono::year_month_weekday_indexed, _CharT>)
	(std::formatter<chrono::year_month_weekday_last, _CharT>):
	Construct _ChronoData in format, and configure _M_needed in
	_ChronoSpec.
	(std::formatter<chrono::duration<_Rep, _Period>, _CharT>)
	(std::formatter<chrono::hh_mm_ss<_Duration>, _CharT>)
	(std::formatter<chrono::sys_time<_Duration>, _CharT>)
	(std::formatter<chrono::utc_time<_Duration>, _CharT>)
	(std::formatter<chrono::tai_time<_Duration>, _CharT>)
	(std::formatter<chrono::gps_time<_Duration>, _CharT>)
	(std::formatter<chrono::file_time<_Duration>, _CharT>)
	(std::formatter<chrono::local_time<_Duration>, _CharT>)
	(std::formatter<chrono::_detail::__local_time_fmt<_Duration>, _CharT>):
	Reworked in terms of __formatter_duration and _ChronoData.
	(std::formatter<chrono::_detail::__utc_leap_second<_Duration>, _CharT>):
	Removed.
	(_Parser<_Duration>::operator()): Adjusted for _ChronoParts
	being enum class.
	* include/std/chrono (__detail::__utc_leap_second): Removed,
	replaced with simply bumping _M_seconds in _ChronoData.
	* testsuite/std/time/format/empty_spec.cc: Updated %S integral
	ouput.

2025-06-26  Jakub Jelinek  <jakub@redhat.com>

	* include/bits/version.def (exception_ptr_cast): Add.
	* include/bits/version.h: Regenerate.
	* libsupc++/exception: Define __glibcxx_want_exception_ptr_cast before
	including bits/version.h.
	* libsupc++/exception_ptr.h (std::exception_ptr_cast): Define.
	(std::__exception_ptr::exception_ptr::_M_exception_ptr_cast): Declare.
	* libsupc++/eh_ptr.cc
	(std::__exception_ptr::exception_ptr::_M_exception_ptr_cast): Define.
	* src/c++23/std.cc.in (std::exception_ptr_cast): Export.
	* config/abi/pre/gnu.ver: Export
	_ZNKSt15__exception_ptr13exception_ptr21_M_exception_ptr_castERKSt9type_info
	at CXXABI_1.3.17.
	* testsuite/util/testsuite_abi.cc (check_version): Allow CXXABI_1.3.17.
	* testsuite/18_support/exception_ptr/exception_ptr_cast.cc: New test.

2025-06-26  Jakub Jelinek  <jakub@redhat.com>

	* include/bits/version.def (type_order): New.
	* include/bits/version.h: Regenerate.
	* libsupc++/compare: Define __glibcxx_want_type_order before
	including bits/version.h.
	(std::type_order, std::type_order_v): New trait and template variable.
	* src/c++23/std.cc.in (std::type_order, std::type_order_v): Export.
	* testsuite/18_support/comparisons/type_order/1.cc: New test.

2025-06-25  Tomasz Kamiński  <tkaminsk@redhat.com>

	* testsuite/std/time/format/precision.cc: New tests.

2025-06-25  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/120650
	* include/bits/chrono_io.h
	(formatter<chrono::month_day_last,_CharT>::parse): Call _M_parse with
	only Month being available.
	* testsuite/std/time/format/data_not_present_neg.cc: New test.

2025-06-24  Patrick Palka  <ppalka@redhat.com>
	    Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/120717
	* include/std/type_traits (__maybe_complete_object_type): New
	helper trait, factored out from ...
	(__is_complete_or_unbounded): ... here.  Only check sizeof on a
	__maybe_complete_object_type type.  Fix formatting.
	* testsuite/20_util/is_complete_or_unbounded/120717.cc: New test.

2025-06-16  Jason Merrill  <jason@redhat.com>

	* testsuite/20_util/is_complete_or_unbounded/memoization.cc
	* testsuite/20_util/is_complete_or_unbounded/memoization_neg.cc:
	Expect -Wsfinae-incomplete.

2025-06-13  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/120397
	* include/bits/stl_uninitialized.h (_UninitDestroyGuard<I,void>):
	Add new member function _S_destroy and call it from the
	destructor (for C++17 only).
	* testsuite/20_util/specialized_algorithms/uninitialized_default_construct/120397.cc:
	New test.
	* testsuite/20_util/specialized_algorithms/uninitialized_value_construct/120397.cc:
	New test.

2025-06-13  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/120648
	* include/bits/chrono_io.h (__formatter_chrono::_M_format_to):
	Handle %c, %r, %x and %X by passing them to _M_c_r_x_X.
	(__formatter_chrono::_M_c_r_x_X): Reworked from _M_c.
	(__formatter_chrono::_M_c): Renamed into above.
	(__formatter_chrono::_M_r, __formatter_chrono::_M_x)
	(__formatter_chrono::_M_X): Removed.
	* testsuite/std/time/format/pr117214.cc: New tests for %r, %x,
	%X with date, time and durations.

2025-06-13  Patrick Palka  <ppalka@redhat.com>

	* include/bits/ranges_algo.h (__detail::__by_ref_or_value_fn): New.
	(__detail::_Comp_proj): New.
	(__detail::__make_comp_proj): Use it instead.
	(__detail::_Pred_proj): New.
	(__detail::__make_pred_proj): Use it instead.

2025-06-13  Giuseppe D'Angelo  <giuseppe.dangelo@kdab.com>

	PR c++/120644
	* include/std/optional (format_kind): Do not use `auto`.

2025-06-13  Tomasz Kamiński  <tkaminsk@redhat.com>

	* testsuite/23_containers/vector/bool/format.cc: Replaced _CharT
	with CharT.
	* testsuite/std/format/debug.cc: Likewise.
	* testsuite/std/format/ranges/adaptors.cc: Likewise.
	* testsuite/std/format/ranges/formatter.cc: Likewise.
	* testsuite/std/format/ranges/map.cc: Likewise.
	* testsuite/std/format/ranges/sequence.cc: Likewise.
	* testsuite/std/format/ranges/string.cc: Likewise.
	* testsuite/std/format/tuple.cc: Likewise.
	* testsuite/std/time/format/empty_spec.cc: Likewise.
	* testsuite/std/time/format/pr120114.cc: Likewise.
	* testsuite/std/time/format/pr120481.cc: Likewise.
	* testsuite/std/time/format/precision.cc: Likewise.

2025-06-13  Tomasz Kamiński  <tkaminsk@redhat.com>

	* include/bits/chrono_io.h (__formatter_chrono::_M_format):
	Remove handling of empty _M_chrono_specs.
	(__formatter_chrono::_M_format_to_ostream): Changed to accept
	only chrono::duration and made public.
	(std::formatter<chrono::duration<_Rep, _Period>, _CharT>):
	Configure __defSpec and handle empty chrono-spec locally.

2025-06-13  Tomasz Kamiński  <tkaminsk@redhat.com>

	* include/bits/chrono_io.h (__format::__formatter_chrono_info)
	[_GLIBCXX_USE_CXX11_ABI || ! _GLIBCXX_USE_DUAL_ABI]: Define.
	(std::formatter<chrono::sys_info, _CharT>)
	(std::formatter<chrono::local_inf, _CharT>): Delegate to
	__format::__formatter_chrono_info.
	(std::operator<<(basic_ostream<_CharT, _Traits>& const sys_info&)):
	Use format on sys_info with empty format spec.

2025-06-13  Tomasz Kamiński  <tkaminsk@redhat.com>

	* testsuite/std/time/format/whitespace.cc: New test.

2025-06-12  Giuseppe D'Angelo  <giuseppe.dangelo@kdab.com>

	PR libstdc++/119496
	* include/bits/stl_algo.h: Adjust calls to requested_size.
	* include/bits/stl_tempbuf.h (requested_size): Rename with
	an _M_ prefix.
	* testsuite/17_intro/names.cc: Add a #define for
	requested_size.

2025-06-12  Giuseppe D'Angelo  <giuseppe.dangelo@kdab.com>

	* include/bits/formatfwd.h (format_kind): Move the definition
	(and some supporting code) from <format>.
	* include/std/format (format_kind): Likewise.
	* include/bits/version.def (optional_range_support): Add
	the feature-testing macro.
	* include/bits/version.h: Regenerate.
	* include/std/optional (iterator, const_iterator, begin, end):
	Add range support.
	(enable_view): Specialize for std::optional.
	(format_kind): Specialize for std::optional.
	* testsuite/20_util/optional/range.cc: New test.
	* testsuite/20_util/optional/version.cc: Test the new
	feature-testing macro.

2025-06-12  Tomasz Kamiński  <tkaminsk@redhat.com>

	* include/bits/chrono_io.h (_ChronoFormats::_S_ftz)
	(_ChronoFormats::_S_ft, _ChronoFormats::_S_t): Define.
	(__formatter_chrono::_M_format_to_ostream): Remove handling for
	time_points.
	(std::formatter<chrono::hh_mm_ss<_Dur>, _CharT>)
	(std::formatter<chrono::sys_time<_Dur>, _CharT>)
	(std::formatter<chrono::utc_time<_Dur>, _CharT>)
	(std::formatter<chrono::tai_time<_Dur>, _CharT>)
	(std::formatter<chrono::gps_time<_Dur>, _CharT>)
	(std::formatter<chrono::file_time<_Dur>, _CharT>)
	(std::formatter<chrono::local_time<_Dur>, _CharT>)
	(std::formatter<chrono::__detail::__local_time_fmt<_Dur>, _CharT>)
	(std::formatter<chrono::zoned_time<_Dur>, _CharT>):
	Define __defSpec, and pass it as argument to _M_prase and
	constructor of __formatter_chrono.

2025-06-12  Tomasz Kamiński  <tkaminsk@redhat.com>

	* include/bits/chrono_io.h (__format::_ChronoFormats): Define.
	(__formatter_chrono::__formatter_chrono())
	(__formatter_chrono::__formatter_chrono(_ChronoSpec<_CharT>)): Define.
	(__formatter_chrono::_M_parse): Add parameter with default spec,
	and merge it with new values. Handle '%\0' as weekday index
	specifier.
	(__formatter_chrono::_M_a_A, __formatter_chrono::_M_b_B)
	(__formatter_chrono::_M_C_y_Y, __formatter_chrono::_M_d_e)
	(__formatter_chrono::_M_F): Support _M_debug flag.
	(__formatter_chrono::_M_wi, __formatter_chrono::_S_weekday_index):
	Define.
	(std::formatter<chrono::day, _CharT>)
	(std::formatter<chrono::month, _CharT>)
	(std::formatter<chrono::year, _CharT>)
	(std::formatter<chrono::weekday, _CharT>)
	(std::formatter<chrono::weekday_indexed, _CharT>)
	(std::formatter<chrono::weekday_last, _CharT>)
	(std::formatter<chrono::month_day, _CharT>)
	(std::formatter<chrono::month_day_last, _CharT>)
	(std::formatter<chrono::month_weekday, _CharT>)
	(std::formatter<chrono::month_weekday_last, _CharT>)
	(std::formatter<chrono::year_month, _CharT>)
	(std::formatter<chrono::year_month_day, _CharT>)
	(std::formatter<chrono::year_month_day_last, _CharT>)
	(std::formatter<chrono::year_month_weekday, _CharT>)
	(std::formatter<chrono::year_month_weekday_last, _CharT>):
	Define __defSpec, and pass it as argument to _M_parse and
	constructor of __formatter_chrono.

2025-06-12  Tomasz Kamiński  <tkaminsk@redhat.com>

	* include/std/mdspan (__mdspan::__mapping_alike): Rename template
	parameter from M to _M_p.
	(layout_right::mapping): Replace class with typename in template
	head.
	(layout_stride::mapping): Fix typo in comment.
	* testsuite/23_containers/mdspan/layouts/class_mandate_neg.cc:
	Changed B to function.

2025-06-12  Luc Grosheintz  <luc.grosheintz@gmail.com>

	* include/std/mdspan (layout_left): Strengthen the exception
	guarantees of layout_left::mapping(layout_stride::mapping).
	* testsuite/23_containers/mdspan/layouts/ctors.cc:
	Simplify tests to reflect the change.

2025-06-12  Luc Grosheintz  <luc.grosheintz@gmail.com>

	* testsuite/23_containers/mdspan/layouts/class_mandate_neg.cc: Add
	tests for layout_stride.
	* testsuite/23_containers/mdspan/layouts/ctors.cc: Add test for
	layout_stride and the interaction with other layouts.
	* testsuite/23_containers/mdspan/layouts/empty.cc: Ditto.
	* testsuite/23_containers/mdspan/layouts/mapping.cc: Ditto.
	* testsuite/23_containers/mdspan/layouts/stride.cc: New test.

2025-06-12  Luc Grosheintz  <luc.grosheintz@gmail.com>

	* include/std/mdspan (layout_stride): New class.
	* src/c++23/std.cc.in: Add layout_stride.

2025-06-12  Luc Grosheintz  <luc.grosheintz@gmail.com>

	* testsuite/23_containers/mdspan/layouts/class_mandate_neg.cc: Add
	tests for layout_right.
	* testsuite/23_containers/mdspan/layouts/ctors.cc: Add tests for
	layout_right and the interaction with layout_left.
	* testsuite/23_containers/mdspan/layouts/empty.cc: ditto.
	* testsuite/23_containers/mdspan/layouts/mapping.cc: ditto.

2025-06-12  Luc Grosheintz  <luc.grosheintz@gmail.com>

	* include/std/mdspan (layout_right): New class.
	* src/c++23/std.cc.in: Add layout_right.

2025-06-12  Luc Grosheintz  <luc.grosheintz@gmail.com>

	* testsuite/23_containers/mdspan/layouts/class_mandate_neg.cc: New test.
	* testsuite/23_containers/mdspan/layouts/ctors.cc: New test.
	* testsuite/23_containers/mdspan/layouts/empty.cc: New test.
	* testsuite/23_containers/mdspan/layouts/mapping.cc: New test.

2025-06-12  Luc Grosheintz  <luc.grosheintz@gmail.com>

	* include/std/mdspan (layout_left): New class.
	* src/c++23/std.cc.in: Add layout_left.

2025-06-12  Luc Grosheintz  <luc.grosheintz@gmail.com>

	* include/std/mdspan(__mdspan::_ExtentsStorage): Change name
	of private member _M_dynamic_extens to _M_dyn_exts.
	(extents): Change name of private member from _M_dynamic_extents
	to _M_exts.
	Fix two instances of whitespace errors.
	* testsuite/23_containers/mdspan/extents/ctor_default.cc: Fix
	integer comparison with cmp_equal.

2025-06-12  Jonathan Wakely  <jwakely@redhat.com>

	* doc/xml/manual/test.xml: Improve discussion of copyright
	notices in new test cases.
	* doc/html/manual/test.html: Regenerate.

2025-06-12  Jonathan Wakely  <jwakely@redhat.com>

	* scripts/create_testsuite_files: Remove incorrect comment about
	filtering out wchar_t tests.

2025-06-12  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/120625
	* include/std/format (__format::__disabled): Remove.
	(__formatter_disabled): New type.
	(formatter<char*, wchar_t>, formatter<const char*, wchar_t>)
	(formatter<char[N], wchar_t>, formatter<string, wchar_t>)
	(formatter<string_view, wchar_t>): Use __formatter_disabled as
	base class instead of formatter<__disabled, wchar_t>.
	* testsuite/std/format/formatter/120625.cc: New test.

2025-06-11  Jonathan Wakely  <jwakely@redhat.com>

	* doc/doxygen/user.cfg.in (PREDEFINED): Remove -D prefixes from
	some macros. Define _GLIBCXX_USE_BUILTIN_TRAIT and
	_GLIBCXX_HAVE_ICONV macros.

2025-06-11  Jonathan Wakely  <jwakely@redhat.com>

	* libsupc++/exception: Remove redundant parentheses and adjust
	whitespace.

2025-06-11  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/type_traits: Restore @cond and @endcond balance.

2025-06-11  Tomasz Kamiński  <tkaminsk@redhat.com>

	* testsuite/std/time/format/empty_spec.cc: New tests.
	* testsuite/std/time/format/precision.cc: New test.

2025-06-11  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/stl_construct.h: Replace std::__addressof with
	std::addressof in code that doesn't need to compile as C++98.
	Replace std::__is_constant_evaluated with
	std::is_constant_evaluated in code that doesn't need to compile
	as C++17 or earlier.
	* include/bits/stl_uninitialized.h: Likewise for __addressof.

2025-06-11  Jonathan Wakely  <jwakely@redhat.com>

	* doc/xml/manual/test.xml: Remove note about unused 'test'
	variables for old definition of VERIFY.
	* doc/html/manual/test.html: Regenerate.
	* testsuite/experimental/net/buffer/arithmetic.cc: Remove unused
	variable.
	* testsuite/experimental/net/buffer/const.cc: Likewise.
	* testsuite/experimental/net/buffer/mutable.cc: Likewise.
	* testsuite/experimental/net/buffer/size.cc: Likewise.
	* testsuite/experimental/net/timer/waitable/cons.cc: Likewise.
	* testsuite/experimental/net/timer/waitable/dest.cc: Likewise.
	* testsuite/experimental/net/timer/waitable/ops.cc: Likewise.
	* testsuite/ext/special_functions/airy_ai/check_value.cc:
	Likewise.
	* testsuite/ext/special_functions/airy_bi/check_value.cc:
	Likewise.
	* testsuite/ext/special_functions/conf_hyperg/check_value.cc:
	Likewise.
	* testsuite/ext/special_functions/hyperg/check_value.cc:
	Likewise.
	* testsuite/special_functions/01_assoc_laguerre/check_value.cc:
	Likewise.
	* testsuite/special_functions/02_assoc_legendre/check_value.cc:
	Likewise.
	* testsuite/special_functions/02_assoc_legendre/pr86655.cc:
	Likewise.
	* testsuite/special_functions/03_beta/check_value.cc: Likewise.
	* testsuite/special_functions/04_comp_ellint_1/check_value.cc:
	Likewise.
	* testsuite/special_functions/05_comp_ellint_2/check_value.cc:
	Likewise.
	* testsuite/special_functions/06_comp_ellint_3/check_value.cc:
	Likewise.
	* testsuite/special_functions/07_cyl_bessel_i/check_value.cc:
	Likewise.
	* testsuite/special_functions/08_cyl_bessel_j/check_value.cc:
	Likewise.
	* testsuite/special_functions/09_cyl_bessel_k/check_value.cc:
	Likewise.
	* testsuite/special_functions/10_cyl_neumann/check_value.cc:
	Likewise.
	* testsuite/special_functions/11_ellint_1/check_value.cc:
	Likewise.
	* testsuite/special_functions/12_ellint_2/check_value.cc:
	Likewise.
	* testsuite/special_functions/13_ellint_3/check_value.cc:
	Likewise.
	* testsuite/special_functions/14_expint/check_value.cc:
	Likewise.
	* testsuite/special_functions/15_hermite/check_value.cc:
	Likewise.
	* testsuite/special_functions/16_laguerre/check_value.cc:
	Likewise.
	* testsuite/special_functions/17_legendre/check_value.cc:
	Likewise.
	* testsuite/special_functions/18_riemann_zeta/check_value.cc:
	Likewise.
	* testsuite/special_functions/19_sph_bessel/check_value.cc:
	Likewise.
	* testsuite/special_functions/20_sph_legendre/check_value.cc:
	Likewise.
	* testsuite/special_functions/20_sph_legendre/pr86655.cc:
	Likewise.
	* testsuite/special_functions/21_sph_neumann/check_value.cc:
	Likewise.
	* testsuite/tr1/5_numerical_facilities/special_functions/01_assoc_laguerre/check_value.cc:
	Likewise.
	* testsuite/tr1/5_numerical_facilities/special_functions/02_assoc_legendre/check_value.cc:
	Likewise.
	* testsuite/tr1/5_numerical_facilities/special_functions/02_assoc_legendre/pr86655.cc:
	Likewise.
	* testsuite/tr1/5_numerical_facilities/special_functions/03_beta/check_value.cc:
	Likewise.
	* testsuite/tr1/5_numerical_facilities/special_functions/04_comp_ellint_1/check_value.cc:
	Likewise.
	* testsuite/tr1/5_numerical_facilities/special_functions/05_comp_ellint_2/check_value.cc:
	Likewise.
	* testsuite/tr1/5_numerical_facilities/special_functions/06_comp_ellint_3/check_value.cc:
	Likewise.
	* testsuite/tr1/5_numerical_facilities/special_functions/07_conf_hyperg/check_value.cc:
	Likewise.
	* testsuite/tr1/5_numerical_facilities/special_functions/08_cyl_bessel_i/check_value.cc:
	Likewise.
	* testsuite/tr1/5_numerical_facilities/special_functions/09_cyl_bessel_j/check_value.cc:
	Likewise.
	* testsuite/tr1/5_numerical_facilities/special_functions/10_cyl_bessel_k/check_value.cc:
	Likewise.
	* testsuite/tr1/5_numerical_facilities/special_functions/11_cyl_neumann/check_value.cc:
	Likewise.
	* testsuite/tr1/5_numerical_facilities/special_functions/12_ellint_1/check_value.cc:
	Likewise.
	* testsuite/tr1/5_numerical_facilities/special_functions/13_ellint_2/check_value.cc:
	Likewise.
	* testsuite/tr1/5_numerical_facilities/special_functions/14_ellint_3/check_value.cc:
	Likewise.
	* testsuite/tr1/5_numerical_facilities/special_functions/15_expint/check_value_neg.cc:
	Likewise.
	* testsuite/tr1/5_numerical_facilities/special_functions/16_hermite/check_value.cc:
	Likewise.
	* testsuite/tr1/5_numerical_facilities/special_functions/17_hyperg/check_value.cc:
	Likewise.
	* testsuite/tr1/5_numerical_facilities/special_functions/18_laguerre/check_value.cc:
	Likewise.
	* testsuite/tr1/5_numerical_facilities/special_functions/19_legendre/check_value.cc:
	Likewise.
	* testsuite/tr1/5_numerical_facilities/special_functions/20_riemann_zeta/check_value_neg.cc:
	Likewise.
	* testsuite/tr1/5_numerical_facilities/special_functions/21_sph_bessel/check_value.cc:
	Likewise.
	* testsuite/tr1/5_numerical_facilities/special_functions/22_sph_legendre/check_value.cc:
	Likewise.
	* testsuite/tr1/5_numerical_facilities/special_functions/22_sph_legendre/pr86655.cc:
	Likewise.
	* testsuite/tr1/5_numerical_facilities/special_functions/23_sph_neumann/check_value.cc:
	Likewise.

2025-06-11  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/sstream: Adjust whitespace.

2025-06-11  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/120390
	* include/bits/stl_construct.h (_Destroy_aux::__destroy_n): New
	static member function.
	(_Destroy_aux<true>::__destroy_n): Likewise.
	(_Destroy_n_aux): Remove.
	(_Destroy(ForwardIterator, ForwardIterator)): Remove
	static_assert. Use is_trivially_destructible instead of
	__has_trivial_destructor.
	(_Destroy_n): Likewise. Use _Destroy_aux::__destroy_n instead of
	_Destroy_n_aux::__destroy_n.
	* testsuite/20_util/specialized_algorithms/memory_management_tools/destroy_neg.cc:
	Adjust dg-error strings. Move destroy_n tests to ...
	* testsuite/20_util/specialized_algorithms/memory_management_tools/destroy_n_neg.cc:
	New test.
	* testsuite/23_containers/vector/cons/destructible_debug_neg.cc:
	Adjust dg-error strings.
	* testsuite/23_containers/vector/cons/destructible_neg.cc:
	Likewise.

2025-06-11  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/27_io/basic_istringstream/cons/char/string_view.cc:
	Only check get_allocator() for new string ABI.
	* testsuite/27_io/basic_ostringstream/cons/char/string_view.cc:
	Likewise.
	* testsuite/27_io/basic_stringbuf/cons/char/string_view.cc:
	Likewise.
	* testsuite/27_io/basic_stringstream/cons/char/string_view.cc:
	Likewise.

2025-06-10  Patrick Palka  <ppalka@redhat.com>

	* include/bits/max_size_type.h (__max_size_type::_M_val): Make
	public instead of private.
	(__max_size_type::_M_msb): Likewise.
	(__max_diff_type::_M_rep): Likewise.
	* testsuite/std/ranges/iota/max_size_type.cc: Verify
	__max_diff_type and __max_size_type are structural.

2025-06-10  Yihan Wang  <yronglin777@gmail.com>
	    Jonathan Wakely  <jwakely@redhat.com>

	* include/std/tuple (__can_make_from_tuple): New variable
	template.
	(__make_from_tuple_impl): Add static_assert.
	(make_from_tuple): Constrain using __can_make_from_tuple.
	* testsuite/20_util/tuple/dr3528.cc: New test.

2025-06-09  Nathan Myers  <ncm@cantrip.org>

	PR libstdc++/119741
	* include/std/sstream: full implementation, really just
	decls, requires clause and plumbing.
	* include/bits/version.def, include/bits/version.h:
	new preprocessor symbol
	__cpp_lib_sstream_from_string_view.
	* testsuite/27_io/basic_stringbuf/cons/char/string_view.cc:
	New tests.
	* testsuite/27_io/basic_istringstream/cons/char/string_view.cc:
	New tests.
	* testsuite/27_io/basic_ostringstream/cons/char/string_view.cc:
	New tests.
	* testsuite/27_io/basic_stringstream/cons/char/string_view.cc:
	New tests.
	* testsuite/27_io/basic_stringbuf/cons/wchar_t/string_view.cc:
	New tests.
	* testsuite/27_io/basic_istringstream/cons/wchar_t/string_view.cc:
	New tests.
	* testsuite/27_io/basic_ostringstream/cons/wchar_t/string_view.cc:
	New tests.
	* testsuite/27_io/basic_stringstream/cons/wchar_t/string_view.cc:
	New tests.

2025-06-08  John David Anglin  <danglin@gcc.gnu.org>

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

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

	* testsuite/30_threads/semaphore/1.cc: Check type properties and
	max() values.
	* testsuite/30_threads/semaphore/3.cc: New test.
	* testsuite/30_threads/semaphore/cons_neg.cc: New test.

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

	* include/bits/semaphore_base.h (_Select_semaphore_impl): Rename
	to _Semaphore_impl and use std::conditional_t instead of an
	immediately invoked lambda expression.
	* include/std/semaphore (counting_semaphore): Adjust to use new
	name.

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

	* testsuite/30_threads/barrier/1.cc: Require hosted. Only
	require gthreads for non-linux targets.
	* testsuite/30_threads/barrier/2.cc: Likewise.
	* testsuite/30_threads/semaphore/1.cc: Likewise.
	* testsuite/30_threads/semaphore/2.cc: Likewise.
	* testsuite/30_threads/semaphore/cons.cc: Likewise.
	* testsuite/30_threads/semaphore/least_max_value_neg.cc:
	Likewise.
	* testsuite/30_threads/semaphore/try_acquire.cc: Likewise.

2025-06-06  Patrick Palka  <ppalka@redhat.com>

	PR libstdc++/120432
	* include/std/flat_map (flat_map::operator[]): Make the
	non-template overloads call try_emplace directly.  Remove
	non-standard same_as constraint on the template overload.
	* testsuite/23_containers/flat_map/1.cc (test08): New test.

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

	* include/bits/atomic_timed_wait.h (__atomic_wait_address_until_v):
	Add assertion to prevent use with proxy waits.
	(__atomic_wait_address_for_v): Likewise.
	* include/bits/atomic_wait.h (__atomic_wait_address_v):
	Likewise.

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

	* include/bits/atomic_wait.h (__atomic_wait_address_v): Add bare
	wait flag.
	* include/bits/semaphore_base.h (__semaphore_base): Rename to
	__semaphore_impl. Replace local variable and predicate lambdas
	with _Available struct.
	(__platform_semaphore_impl): New class template.
	(__semaphore_impl): Remove alias template.
	(_Select_semaphore_impl): New alias template.
	* include/std/semaphore (counting_semaphore): Use
	_Select_semaphore_impl.

2025-06-06  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/120565
	* include/bits/chrono_io.h
	(operator<<(basic_ostream<_CharT, _Traits>&, const sys_info&))
	(operator<<(basic_ostream<_CharT, _Traits>&, const local_info&)):
	Support wchar_t as _CharT.
	* testsuite/std/time/format/empty_spec.cc: Instantiated test_infos for
	wchar_t and increase timeout.

2025-06-06  Tomasz Kamiński  <tkaminsk@redhat.com>

	* testsuite/std/time/format/empty_spec.cc: New tests and increased
	timeout.

2025-06-05  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/120548
	* include/std/format (__formatter_fp::_M_localize): Do not
	include a leading sign character in the string to be grouped.
	* testsuite/std/format/functions/format.cc: Check grouping when
	sign is present in the output.

2025-06-05  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/119152
	* src/c++23/std.cc.in (std::indirect, pmr::indirect)
	[__cpp_lib_indirect]
	(std::polymorphic, pmr::polymorphic) [__cpp_lib_polymorphic]: Export.

2025-06-05  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/120481
	* include/bits/chrono_io.h (__format::_S_chars): Reorder so it
	contains "-{}".
	(__format::_S_colon, __format::_S_slash, __format::_S_space)
	(__format::_S_plus_minus): Updated starting indicies.
	(__format::_S_minus_empty_spec): Define.
	(__formatter_chrono::_M_C_y_Y, __formatter_chrono::_M_R_T):
	Rework implementation.
	(__formatter_chrono::_M_d_e, __formatter_chrono::_M_F)
	(__formatter_chrono::_M_m, __formatter_chrono::_M_u_w)
	(__formatter_chrono::_M_H_I, __formatter_chrono::_M_p):
	Handle multi digits values.
	(__formatter_chrono::_S_digit): Return string view.
	(__formatter_chrono::_S_str_d1, __formatter_chrono::_S_str_d2)
	(__formatter_chrono::_S_fill_two_digits): Define.
	* testsuite/std/time/format/empty_spec.cc: Update test for
	year_month_day, that uses '%F'.
	* testsuite/std/time/format/pr120481.cc: New test.

2025-06-05  Nathan Myers  <ncm@cantrip.org>

	Revert:
	2025-06-04  Nathan Myers  <ncm@cantrip.org>

	PR libstdc++/119741
	* include/std/sstream: full implementation, really just
	decls, requires clause and plumbing.
	* include/bits/version.def, include/bits/version.h:
	new preprocessor symbol
	__cpp_lib_sstream_from_string_view.
	* testsuite/27_io/basic_stringbuf/cons/char/string_view.cc:
	New tests.
	* testsuite/27_io/basic_istringstream/cons/char/string_view.cc:
	New tests.
	* testsuite/27_io/basic_ostringstream/cons/char/string_view.cc:
	New tests.
	* testsuite/27_io/basic_stringstream/cons/char/string_view.cc:
	New tests.
	* testsuite/27_io/basic_stringbuf/cons/wchar_t/string_view.cc:
	New tests.
	* testsuite/27_io/basic_istringstream/cons/wchar_t/string_view.cc:
	New tests.
	* testsuite/27_io/basic_ostringstream/cons/wchar_t/string_view.cc:
	New tests.
	* testsuite/27_io/basic_stringstream/cons/wchar_t/string_view.cc:
	New tests.

2025-06-04  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/std/time/format/empty_spec.cc: Only test time zones
	for cxx11 string ABI.

2025-06-04  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/99832
	* include/bits/chrono.h (system_clock::to_time_t): Add
	always_inline attribute to be agnostic to the underlying type of
	time_t.
	(system_clock::from_time_t): Add always_inline for consistency
	with to_time_t.
	* testsuite/20_util/system_clock/99832.cc: New test.

2025-06-04  Nathan Myers  <ncm@cantrip.org>

	PR libstdc++/119741
	* include/std/sstream: full implementation, really just
	decls, requires clause and plumbing.
	* include/bits/version.def, include/bits/version.h:
	new preprocessor symbol
	__cpp_lib_sstream_from_string_view.
	* testsuite/27_io/basic_stringbuf/cons/char/string_view.cc:
	New tests.
	* testsuite/27_io/basic_istringstream/cons/char/string_view.cc:
	New tests.
	* testsuite/27_io/basic_ostringstream/cons/char/string_view.cc:
	New tests.
	* testsuite/27_io/basic_stringstream/cons/char/string_view.cc:
	New tests.
	* testsuite/27_io/basic_stringbuf/cons/wchar_t/string_view.cc:
	New tests.
	* testsuite/27_io/basic_istringstream/cons/wchar_t/string_view.cc:
	New tests.
	* testsuite/27_io/basic_ostringstream/cons/wchar_t/string_view.cc:
	New tests.
	* testsuite/27_io/basic_stringstream/cons/wchar_t/string_view.cc:
	New tests.

2025-06-04  Patrick Palka  <ppalka@redhat.com>

	* include/bits/c++config (_GLIBCXX_AUTO_CAST): Define.
	* include/bits/iterator_concepts.h (_Decay_copy, __decay_copy):
	Remove.
	(__member_begin, __adl_begin): Use _GLIBCXX_AUTO_CAST instead of
	__decay_copy as per P0849R8.
	* include/bits/ranges_base.h (_Begin): Likewise.
	(__member_end, __adl_end, _End): Likewise.
	(__member_rbegin, __adl_rbegin, _RBegin): Likewise.
	(__member_rend, __adl_rend, _Rend): Likewise.
	(__member_size, __adl_size, _Size): Likewise.
	(_Data): Likewise.

2025-06-04  Tomasz Kamiński  <tkaminsk@redhat.com>

	* testsuite/std/time/format/empty_spec.cc: New tests.

2025-06-04  Patrick Palka  <ppalka@redhat.com>

	* include/bits/ranges_algo.h (__starts_with_fn, starts_with):
	Define.
	(__ends_with_fn, ends_with): Define.
	* include/bits/version.def (ranges_starts_ends_with): Define.
	* include/bits/version.h: Regenerate.
	* include/std/algorithm: Provide __cpp_lib_ranges_starts_ends_with.
	* src/c++23/std.cc.in (ranges::starts_with): Export.
	(ranges::ends_with): Export.
	* testsuite/25_algorithms/ends_with/1.cc: New test.
	* testsuite/25_algorithms/starts_with/1.cc: New test.

2025-06-04  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/semaphore_base.h (_S_get_current): Replace with
	non-static _M_get_current.
	(_S_do_try_acquire): Replace with non-static _M_do_try_acquire.

2025-06-04  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/104928
	* include/bits/semaphore_base.h (_S_do_try_acquire): Take old
	value by reference.
	(_M_acquire): Move _S_do_try_acquire call out of the predicate
	and loop on its result. Make the predicate capture and update
	the local copy of the value.
	(_M_try_acquire_until, _M_try_acquire_for): Likewise.
	(_M_try_acquire): Just call _M_try_acquire_for.
	* testsuite/30_threads/semaphore/104928-2.cc: New test.
	* testsuite/30_threads/semaphore/104928.cc: New test.

2025-06-04  Tomasz Kamiński  <tkaminsk@redhat.com>

	* include/bits/chrono_io.h (__formatter_chrono:_M_s): Add missing
	__out argument to format_to call.
	* testsuite/std/time/format/empty_spec.cc: New test.

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

	* include/std/stop_token: Check __glibcxx_jthread instead of
	__cplusplus.

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

	* include/std/type_traits (is_destructible, is_destructible_v):
	Define using new built-in.
	(is_nothrow_destructible, is_nothrow_destructible_v): Likewise.
	(is_trivially_destructible, is_trivially_destructible_v):
	Likewise.

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

	* include/bits/atomic_timed_wait.h (__detail::__wait_until):
	Remove incorrect comment.
	(__atomic_wait_address_until_v): Do not take address of __args in
	call to __detail::__wait_until. Fix return statement to refer to
	member of __wait_result_type.
	(__atomic_wait_address_for_v): Change parameter type from
	time_point to duration.
	* src/c++20/atomic.cc (__spin_until_impl): Fix incorrect
	return value. Reuse result of first call to clock.

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

	* include/bits/stl_vector.h (~_Vector_base): Add unreachable
	hint for negative capacity and cast to size_t explicitly.
	* include/bits/vector.tcc (vector::_M_realloc_append): Use
	size() instead of end() - begin().

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

	* include/std/bit (__rotl, __rotr): Use static_cast for
	conversion from int to unsigned.

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

	* src/c++23/std.cc.in: Remove redundant checks for feature test
	macros that are always true.

2025-06-02  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/basic_string.h (basic_string::size): Remove space
	before parameter list.
	(basic_string::capacity): Likewise.
	* include/bits/stl_deque.h (deque::size): Likewise.
	* include/bits/stl_vector.h (vector::size, vector::capacity):
	Likewise.
	* include/bits/vector.tcc (vector::_M_realloc_insert): Likewise.
	(vector::_M_realloc_append): Likewise.

2025-06-02  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/120386
	* include/bits/ranges_algo.h (__unique_copy_fn): Reorder
	arguments for third case to match the first two cases.
	* include/bits/stl_algo.h (__unique_copy): Replace three
	overloads with two, depending only on the iterator category of
	the input range.  Dispatch to __unique_copy_1 for the
	non-forward case.
	(__unique_copy_1): New overloads for the case where the input
	range uses non-forward iterators.
	(unique_copy): Only pass the input range category to
	__unique_copy.
	* testsuite/25_algorithms/unique_copy/lwg2439.cc: New test.

2025-06-02  Tomasz Kamiński  <tkaminsk@redhat.com>

	* include/bits/funcwrap.h (__polyfunc::__pass_by_rref): Define.
	(__polyfunc::__param_t): Update to use __pass_by_rref.
	* include/bits/cpyfunc_impl.h:: Assert that are parameters type
	are complete.
	* include/bits/funcref_impl.h: Likewise.
	* include/bits/mofunc_impl.h: Likewise.
	* testsuite/20_util/copyable_function/call.cc: New test.
	* testsuite/20_util/function_ref/call.cc: New test.
	* testsuite/20_util/move_only_function/call.cc: New test.
	* testsuite/20_util/copyable_function/conv.cc: New test.
	* testsuite/20_util/function_ref/conv.cc: New test.
	* testsuite/20_util/move_only_function/conv.cc: New test.
	* testsuite/20_util/copyable_function/incomplete_neg.cc: New test.
	* testsuite/20_util/function_ref/incomplete_neg.cc: New test.
	* testsuite/20_util/move_only_function/incomplete_neg.cc: New test.

2025-06-02  Jonathan Wakely  <jwakely@redhat.com>
	    Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/119152
	* include/bits/indirect.h (std::polymorphic, pmr::polymorphic)
	[__glibcxx_polymorphic]: Define.
	* include/bits/version.def (polymorphic): Define.
	* include/bits/version.h: Regenerate.
	* include/std/memory: Define __cpp_lib_polymorphic.
	* testsuite/std/memory/polymorphic/copy.cc: New test.
	* testsuite/std/memory/polymorphic/copy_alloc.cc: New test.
	* testsuite/std/memory/polymorphic/ctor.cc: New test.
	* testsuite/std/memory/polymorphic/ctor_poly.cc: New test.
	* testsuite/std/memory/polymorphic/incomplete.cc: New test.
	* testsuite/std/memory/polymorphic/invalid_neg.cc: New test.
	* testsuite/std/memory/polymorphic/move.cc: New test.
	* testsuite/std/memory/polymorphic/move_alloc.cc: New test.

2025-05-30  Tomasz Kamiński  <tkaminsk@redhat.com>

	* testsuite/std/time/format/empty_spec.cc: New test.

2025-05-30  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/atomic_timed_wait.h: Use __wait_result_type.
	* include/bits/atomic_wait.h (__wait_result_type): New struct.
	(__wait_args::_M_prep_for_wait_on): Rename to _M_setup_wait, use
	__wait_result_type.
	(__atomic_wait_address): Adjust to call _M_setup_wait.
	* src/c++20/atomic.cc (__spin_impl): Use __wait_result_type.
	(__wait_impl): Likewise.
	(__spin_until_impl): Likewise.
	(__wait_until_impl): Likewise.

2025-05-30  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/118494
	PR libstdc++/110854
	PR libstdc++/98749
	* acinclude.m4 (GLIBCXX_CHECK_GTHREADS): Remove checks for
	sem_timedwait. Do not define _GLIBCXX_HAVE_POSIX_SEMAPHORE.
	* config.h.in: Regenerate.
	* configure: Regenerate.
	* include/bits/semaphore_base.h (__platform_semaphore): Remove.
	(__atomic_semaphore): Replace with __semaphore_base<bool> and
	make type of _M_count depend on template parameter. Fix _S_max
	constant to use correct type.
	(__semaphore_base::_M_try_acquire): Qualify to avoid ADL.
	(__semaphore_base::_M_release): Return old value. Remove FIXME
	comment.
	(__semaphore_impl): Replace typedef with alias template.
	* include/bits/version.def (semaphore): Do not depend on
	_GLIBCXX_HAVE_POSIX_SEMAPHORE.
	* include/bits/version.h: Regenerate.
	* include/std/semaphore (semaphore): Adjust type of _M_sem
	member. Add constexpr to constructor. Add assertions to
	(semaphore::semaphore(ptrdiff_t)): Add constexpr. Add assertion
	for precondition.
	(semaphore::release): Add assertion using value returned from
	_M_release.
	* testsuite/30_threads/semaphore/100806.cc: Increase template
	argument for std::counting_semaphore, so constructor
	precondition is met.
	* testsuite/30_threads/semaphore/cons.cc: New test.
	* testsuite/30_threads/semaphore/try_acquire_posix.cc: Remove.
	* testsuite/30_threads/semaphore/platform_try_acquire_for.cc:
	Removed.

2025-05-30  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/barrier (__tree_barrier_base): New class.
	(__tree_barrier): Move non-dependent code into
	__tree_barrier_base and derive from it.

2025-05-30  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/118395
	PR libstdc++/108974
	PR libstdc++/98749
	* include/std/barrier (__tree_barrier): Use default
	member-initializers. Change _M_state member from
	unique_ptr<__state_t[]> to atomic<__state_t*>. Add
	no_unique_address attribute to _M_completion.
	(__tree_barrier::_M_arrive): Load value from _M_state.
	(__tree_barrier::_M_invoke_completion): New member function to
	ensure a throwing completion function will terminate, as
	proposed in LWG 3898.
	(__tree_barrier::max): Reduce by one to avoid overflow.
	(__tree_barrier::__tree_barrier): Add constexpr. Qualify call to
	std::move. Remove mem-initializers made unnecessary by default
	member-initializers. Add precondition check. Only allocate state
	array if not constant evaluated.
	(__tree_barrier::arrive): Add precondition check. Do deferred
	initialization of _M_state if needed.
	(barrier): Add static_assert, as proposed in LWG 3898.
	(barrier::barrier): Add constexpr.
	* testsuite/30_threads/barrier/cons.cc: New test.
	* testsuite/30_threads/barrier/lwg3898.cc: New test.

2025-05-30  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/latch (latch::arrive_and_wait): Optimise.

2025-05-30  Jonathan Wakely  <jwakely@redhat.com>

	* config/abi/pre/gnu.ver: Add new symbol version and exports.
	* include/bits/atomic_timed_wait.h (__platform_wait_until): Move
	to atomic.cc.
	(__cond_wait_until, __spin_until_impl): Likewise.
	(__wait_until_impl): Likewise. Change __wait_args_base parameter
	to non-const reference and change third parameter to
	__wait_clock_t::duration.
	(__wait_until): Change __wait_args_base parameter to non-const
	reference. Change Call time_since_epoch() to get duration from
	time_point.
	(__wait_for): Change __wait_args_base parameter to non-const
	reference.
	(__atomic_wait_address_until): Call _M_prep_for_wait_on on args.
	(__atomic_wait_address_for): Likewise.
	(__atomic_wait_address_until_v): Qualify call to avoid ADL. Do
	not forward __vfn.
	* include/bits/atomic_wait.h (__platform_wait_uses_type): Use
	alignof(T) not alignof(T*).
	(__futex_wait_flags, __platform_wait, __platform_notify)
	(__waitable_state, __spin_impl, __notify_impl): Move to
	atomic.cc.
	(__wait_impl): Likewise. Change __wait_args_base parameter to
	non-const reference.
	(__wait_args_base::_M_wait_state): New data member.
	(__wait_args_base::_M_prep_for_wait_on): New member function.
	(__wait_args_base::_M_load_proxy_wait_val): New member
	function.
	(__wait_args_base::_S_memory_order_for): Remove member function.
	(__atomic_wait_address): Call _M_prep_for_wait_on on args.
	(__atomic_wait_address_v): Qualify call to avoid ADL.
	* src/c++20/Makefile.am: Add new file.
	* src/c++20/Makefile.in: Regenerate.
	* src/c++20/atomic.cc: New file.
	* testsuite/17_intro/headers/c++1998/49745.cc: Remove XFAIL for
	C++20 and later.
	* testsuite/29_atomics/atomic/wait_notify/100334.cc: Remove use
	of internal implementation details.
	* testsuite/util/testsuite_abi.cc: Add GLIBCXX_3.4.35 version.

2025-05-30  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/atomic_timed_wait.h (__wait_until_impl): Adjust
	to use new naming.
	* include/bits/atomic_wait.h (__waiter_pool_impl): Rename to
	__waitable_state.
	(__waiter_pool_impl::_S_wait): Rename to _M_waiters.
	(__waiter_pool_impl::_S_impl_for): Rename to _S_state_for.
	(__waiter_pool_impl::_S_track): Adjust to use new naming.
	(__wait_impl, __notify_impl): Likewise.
	* testsuite/29_atomics/atomic/wait_notify/100334.cc: Adjust to
	use new naming.

2025-05-30  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/atomic_timed_wait.h
	(__atomic_wait_address_until_v): Replace __atomic_compare with
	__atomic_eq.
	(__atomic_wait_address_for_v): Likewise.
	* include/bits/atomic_wait.h (__atomic_compare): Rename to
	__atomic_eq.
	(__atomic_wait_address_v): Replace __atomic_compare with
	__atomic_eq.

2025-05-30  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/atomic_timed_wait.h (__wait_until_impl): Change
	first parameter to const void* and then static_cast to const
	__platform_wait_t* when not using proxied wait.
	(__wait_until): Change first parameter to const void*.
	(__wait_for): Likewise.
	(__atomic_wait_address_until): Remove reinterpret_cast and allow
	address to implicitly convert to const void* instead.
	(__atomic_wait_address_for): Likewise.
	* include/bits/atomic_wait.h: (__wait_impl, __notify_impl):
	Change first parameter to const void* and then static_cast to
	const __platform_wait_t* when not using proxied wait.
	(__atomic_wait_address, __atomic_notify_address) Remove
	reinterpret_cast and allow address to implicitly convert to
	const void* instead.

2025-05-30  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/atomic_wait.h (__platform_wait): Change function
	template to a normal function. The parameter is always
	__platform_wait_t* which is just int* for this implementation of
	the function.
	(__platform_notify): Likewise.

2025-05-30  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/atomic_timed_wait.h (__to_wait_clock): Do not use
	chrono::ceil if clock and duration are already correct type.
	(__wait_until): Always call __to_wait_clock.

2025-05-30  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/atomic_wait.h (__notify_impl): Increment the
	proxy value before returning early for the uncontended case.

2025-05-30  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/atomic_timed_wait.h (__cond_wait_impl): Add
	missing inline keyword.
	(__spin_until_impl): Change parameter from pointer to reference.
	Replace make_pair with list-initialization.  Initialize variable
	for return value.
	(__wait_until_impl): Likewise. Remove some preprocessor
	conditional logic. Use _S_track for contention tracking.
	Avoid unnecessary const_cast.
	(__wait_until): Change parameter from pointer to reference.
	Replace make_pair with list-initialization.
	(__wait_for):  Change parameter from pointer to reference. Add
	__do_spin flag to args.
	* include/bits/atomic_wait.h (__waiter_pool_impl::_S_track): New
	function returning an RAII object for contention tracking.
	(__wait_flags): Do not set the __do_spin flag in the __spin_only
	enumerator. Comment out the unused __abi_version_mask
	enumerator.  Define operator| and operator|= overloads.
	(__wait_args_base::operator&): Define.
	(__wait_args::operator&, __wait_args::_S_default_flags): Remove.
	(__wait_args::operator|, __wait_args::operator|=): Remove.
	(__spin_impl): Change parameter from pointer to reference.
	Replace make_pair call with list-initialization.
	(__wait_impl): Likewise.  Remove some preprocessor conditional
	logic.  Always store old value in __args._M_old. Avoid
	unnecessary const_cast. Use _S_track.
	(__notify_impl): Change parameter to reference. Remove some
	preprocessor conditional logic.
	(__atomic_wait_address): Add comment. Update __args._M_old on
	each iteration.
	(__atomic_wait_address_v): Add comment.
	* include/std/latch (latch::wait): Adjust predicates for new
	logic.
	* testsuite/29_atomics/atomic_integral/wait_notify.cc: Improve
	test.

2025-05-30  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/atomic_timed_wait.h: Whitespace fixes.
	* include/bits/atomic_wait.h: Likewise.

2025-05-30  Thomas Rodgers  <trodgers@redhat.com>

	* include/bits/atomic_timed_wait.h (__spin_until_impl): Accept
	__wait_args as const __wait_args_base*.
	(__wait_until_impl): Likewise.
	(__wait_until): Likewise.
	(__wait_for): Likewise.
	(__atomic_wait_address_until): Pass __wait_args by address.
	(__atomic_wait_address_for): Likewise.
	* include/bits/atomic_wait.h (__wait_args_base): New struct.
	(__wait_args): Derive from __wait_args_base.
	(__wait_args::__wait_args()): Adjust ctors to call call base ctor.
	(__wait_args::__wait_args(const __wait_args_base&)): New ctor.
	(__wait_args::operator|=): New method.
	(__wait_args::_S_flags_for): Change return type to
	__wait_flags.
	(__spin_impl): Accept __wait_args as const __wait_args_base*.
	(__wait_impl): Likewise.
	(__notify_impl): Likewise.
	(__atomic_wait_address): Pass __wait_args by address.
	(__atomic_wait_address_v): Likewise.
	(__atomic_notify_address): Likewise.

2025-05-30  Thomas Rodgers  <trodgers@redhat.com>

	* include/bits/atomic_timed_wait.h:
	(__detail::__platform_wait_until_impl): Rename to
	__platform_wait_until.
	(__detail::__platform_wait_until): Remove previous
	definition.
	(__detail::__cond_wait_until_impl): Rename to
	__cond_wait_until.
	(__detail::__cond_wait_until): Remove previous
	definition.
	(__detail::__spin_until_impl): New function.
	(__detail::__wait_until_impl): New function.
	(__detail::__wait_until): New function.
	(__detail::__wait_for): New function.
	(__detail::__timed_waiter_pool): Remove type.
	(__detail::__timed_backoff_spin_policy): Remove type.
	(__detail::__timed_waiter): Remove type.
	(__detail::__enters_timed_wait): Remove type alias.
	(__detail::__bare_timed_wait): Remove type alias.
	(__atomic_wait_address_until): Adjust to new implementation
	detail.
	(__atomic_wait_address_until_v): Likewise.
	(__atomic_wait_address_bare): Remove.
	(__atomic_wait_address_for): Adjust to new implementation
	detail.
	(__atomic_wait_address_for_v): Likewise.
	(__atomic_wait_address_for_bare): Remove.
	* include/bits/atomic_wait.h: Include bits/stl_pair.h.
	(__detail::__default_spin_policy): Remove type.
	(__detail::__atomic_spin): Remove function.
	(__detail::__waiter_pool_base): Rename to __waiter_pool_impl.
	Remove _M_notify.  Rename _S_for to _S_impl_for.
	(__detail::__waiter_base): Remove type.
	(__detail::__waiter_pool): Remove type.
	(__detail::__waiter): Remove type.
	(__detail::__enters_wait): Remove type alias.
	(__detail::__bare_wait): Remove type alias.
	(__detail::__wait_flags): New enum.
	(__detail::__wait_args): New struct.
	(__detail::__wait_result_type): New type alias.
	(__detail::__spin_impl): New function.
	(__detail::__wait_impl): New function.
	(__atomic_wait_address): Adjust to new implementation detail.
	(__atomic_wait_address_v): Likewise.
	(__atomic_notify_address): Likewise.
	(__atomic_wait_address_bare): Delete.
	(__atomic_notify_address_bare): Likewise.
	* include/bits/semaphore_base.h: Adjust implementation to
	use new __atomic_wait_address_v contract.
	* include/std/barrier: Adjust implementation to use new
	__atomic_wait contract.
	* include/std/latch: Adjust implementation to use new
	__atomic_wait contract.
	* testsuite/29_atomics/atomic/wait_notify/100334.cc (main):
	Adjust to for __detail::__waiter_pool_base renaming.

2025-05-29  Patrick Palka  <ppalka@redhat.com>

	* include/std/flat_map (_Flat_map_impl::operator==): Compare
	keys and values separately.

2025-05-29  Patrick Palka  <ppalka@redhat.com>
	    Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/120465
	* include/std/flat_map (_Flat_map_impl::_M_erase_if): Use a
	projection with ranges::remove_if to pass a pair instead of
	a tuple to the predicate.
	* testsuite/23_containers/flat_map/1.cc (test07): Strengthen
	to expect the argument passed to the predicate is a pair.
	* testsuite/23_containers/flat_multimap/1.cc (test07): Likewise.

2025-05-29  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/17_intro/names.cc [_AIX] (a): Undefine.
	* testsuite/experimental/names.cc [_AIX] (ptr): Undefine.

2025-05-29  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/22_locale/num_put/put/char/lwg4084.cc [_AIX]: Adjust
	expected output for NaN and infinity.

2025-05-29  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/23_containers/deque/capacity/shrink_to_fit.cc:
	Remove dg-xfail-run-if for AIX.
	* testsuite/23_containers/unordered_map/96088.cc: Replace
	dg-xfail-run-if with dg-require-effective-target c++20.
	* testsuite/23_containers/unordered_multimap/96088.cc: Likewise.
	* testsuite/23_containers/unordered_multiset/96088.cc: Likewise.
	* testsuite/23_containers/unordered_set/96088.cc: Likewise.

2025-05-29  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/boost_concept_check.h: Disable -Wlong-long
	warnings.
	* testsuite/24_iterators/operations/prev_neg.cc: Adjust dg-error
	line number.

2025-05-29  Jonathan Wakely  <jwakely@redhat.com>

	* doc/xml/manual/test.xml: Remove outdated documentation on
	testing with -std options in --target_board.
	* doc/html/manual/test.html: Regenerate.

2025-05-27  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/17_intro/names.cc [_AIX] (n): Undefine.
	* testsuite/experimental/names.cc [_AIX] (ptr): Undefine.

2025-05-27  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/std/format/debug.cc: Disable for targets with 16-bit
	wchar_t.
	* testsuite/std/format/functions/format.cc: Use -DUNICODE for
	targets with 32-bit wchar_t.
	(test_unicode) [UNICODE]: Only run checks when UNICODE is
	defined.

2025-05-27  Jonathan Wakely  <jwakely@redhat.com>

	* include/Makefile.in: Regenerate.

2025-05-27  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/96710
	* include/bits/std_abs.h [__SIZEOF_INT128__] (abs(__int128)):
	Define.
	[_GLIBCXX_USE_FLOAT128] (abs(__float128)): Enable definition for
	strict modes.
	* testsuite/26_numerics/headers/cmath/82644.cc: Use strict_std
	instead of defining __STRICT_ANSI__.
	* testsuite/26_numerics/headers/cstdlib/abs128.cc: New test.

2025-05-27  Luc Grosheintz  <luc.grosheintz@gmail.com>

	* include/std/mdspan: Value initialize the array storing the
	dynamic extents.
	* testsuite/23_containers/mdspan/extents/ctor_default.cc: New
	test.

2025-05-26  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/119152
	* testsuite/std/memory/indirect/ctor.cc: Run test_inplace_ctor.

2025-05-26  Jonathan Wakely  <jwakely@redhat.com>
	    Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/119152
	* doc/doxygen/stdheader.cc: Added indirect.h file.
	* include/Makefile.am: Add new header.
	* include/Makefile.in: Regenerate.
	* include/bits/indirect.h: New file.
	* include/bits/version.def (indirect): Define.
	* include/bits/version.h: Regenerate.
	* include/std/memory: Include new header.
	* testsuite/std/memory/indirect/copy.cc
	* testsuite/std/memory/indirect/copy_alloc.cc
	* testsuite/std/memory/indirect/ctor.cc
	* testsuite/std/memory/indirect/incomplete.cc
	* testsuite/std/memory/indirect/invalid_neg.cc
	* testsuite/std/memory/indirect/move.cc
	* testsuite/std/memory/indirect/move_alloc.cc
	* testsuite/std/memory/indirect/relops.cc

2025-05-26  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/119126
	* doc/doxygen/stdheader.cc: Added funcref_impl.h file.
	* include/Makefile.am: Added funcref_impl.h file.
	* include/Makefile.in: Added funcref_impl.h file.
	* include/bits/funcref_impl.h: New file.
	* include/bits/funcwrap.h: (_Ptrs::_M_obj): Const-qualify.
	(_Storage::_M_ptr, _Storage::_M_ref): Remove.
	(__polyfunc::__cast_to) Define.
	(_Base_invoker::_S_ptrs, _Base_invoker::_S_nttp)
	(_Base_invoker::_S_bind_ptrs, _Base_invoker::_S_bind_ref)
	(_Base_invoker::_S_call_ptrs): Define.
	(_Base_invoker::_S_call_storage): Foward to _S_call_ptrs.
	(_Manager::_S_local, _Manager::_S_ptr): Adjust for _M_obj being
	const qualified.
	(__polyfunc::_Manager, __polyfunc::_Mo_base): Guard with
	__glibcxx_move_only_function || __glibcxx_copyable_function.
	(__polyfunc::__skip_first_arg, __polyfunc::__deduce_funcref)
	(std::function_ref) [__glibcxx_function_ref]: Define.
	* include/bits/utility.h (std::nontype_t, std::nontype)
	(__is_nontype_v) [__glibcxx_function_ref]: Define.
	* include/bits/version.def: Define function_ref.
	* include/bits/version.h: Regenerate.
	* include/std/functional: Define __cpp_lib_function_ref.
	* src/c++23/std.cc.in (std::nontype_t, std::nontype)
	(std::function_ref) [__cpp_lib_function_ref]: Export.
	* testsuite/20_util/function_ref/assign.cc: New test.
	* testsuite/20_util/function_ref/call.cc: New test.
	* testsuite/20_util/function_ref/cons.cc: New test.
	* testsuite/20_util/function_ref/cons_neg.cc: New test.
	* testsuite/20_util/function_ref/conv.cc: New test.
	* testsuite/20_util/function_ref/deduction.cc: New test.
	* testsuite/20_util/function_ref/mutation.cc: New test.

2025-05-23  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/120384
	* include/bits/stl_algo.h (__unique_copy): Remove all
	_BinaryPredicateConcept concept checks.
	(unique_copy): Check _BinaryPredicateConcept in overload that
	takes a predicate.
	* testsuite/25_algorithms/unique_copy/120384.cc: New test.

2025-05-23  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/type_traits (is_constant_evaluated): Add
	always_inline attribute.

2025-05-23  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/17_intro/names.cc [__sun__] (a, i, n): Undefine.

2025-05-23  Stefan Schulze Frielinghaus  <stefansf@gcc.gnu.org>

	* testsuite/std/format/parse_ctx.cc: Fix typo for bfloat16 guard.

2025-05-22  Jonathan Wakely  <jwakely@redhat.com>
	    Tomasz Kamiński  <tkaminsk@redhat.com>

	* include/bits/allocated_ptr.h (_Scoped_allocation): New class
	template.

2025-05-22  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/util/pstl/test_utils.h (ForwardIterator::operator++):
	Fix return type.
	(BidirectionalIterator::operator++): Likewise.
	(BidirectionalIterator::operator--): Likewise.

2025-05-22  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/120367
	* include/bits/stl_vector.h (_M_range_initialize): Initialize
	_M_impl._M_finish.
	* testsuite/23_containers/vector/cons/from_range.cc: Check with
	a type that throws on construction.
	exceptions during construction.

2025-05-21  Alexandre Oliva  <oliva@adacore.com>

	* testsuite/21_strings/basic_string/numeric_conversions/char/stold.cc:
	Guard non-wide stold calls with conditions for it to be
	defined.
	* testsuite/27_io/basic_ostream/inserters_arithmetic/char/hexfloat.cc:
	Likewise.

2025-05-21  Xℹ Ruoyao  <xry111@mengyan1223.wang>

	PR libstdc++/81806
	* include/ext/pb_ds/detail/bin_search_tree_/split_join_fn_imps.hpp
	(split_finish): Use maintained size, instead of calling
	std::distance.

2025-05-21  Xℹ Ruoyao  <xry111@mengyan1223.wang>

	* include/ext/pb_ds/detail/rb_tree_map_/node.hpp
	(rb_tree_node_::size_type): New typedef.
	(rb_tree_node_::m_subtree_size): New field.
	* include/ext/pb_ds/detail/splay_tree_/node.hpp
	(splay_tree_node_::size_type): New typedef.
	(splay_tree_node_::m_subtree_size): New field.
	* include/ext/pb_ds/detail/bin_search_tree_/bin_search_tree_.hpp
	(PB_DS_BIN_TREE_NAME::update_subtree_size): Declare new member
	function.
	* include/ext/pb_ds/detail/bin_search_tree_/rotate_fn_imps.hpp
	(update_subtree_size): Define.
	(apply_update, update_to_top): Call update_subtree_size.

2025-05-21  Xℹ Ruoyao  <xry111@mengyan1223.wang>

	* include/ext/pb_ds/detail/bin_search_tree_/insert_fn_imps.hpp
	(insert_leaf_new, insert_imp_empty): remove redundant statements.

2025-05-20  Tomasz Kamiński  <tkaminsk@redhat.com>

	* include/bits/chrono_io.h (_ChronoSpec::_M_locale_specific):
	Declare as bit fiekd in tail-padding..
	* include/bits/formatfwd.h (__format::_Align): Defined as enum
	class and add using enum.
	* include/std/format (__format::_Pres_type, __format::_Sign)
	(__format::_WidthPrec,  __format::_Arg_t): Defined as enum class
	and add using enum.
	(_Pres_type::_Pres_esc): Replace with _Pres_max.
	(_Pres_type::_Pres_seq, _Pres_type::_Pres_str): Remove.
	(__format::_Pres_type): Updated values of enumerators as described
	above.
	(__format::_Spec): Rearranged members to have 8 bits of tail-padding.
	(_Spec::_M_debug): Defined.
	(_Spec::_M_reserved): Extended to 8 bits and moved at the end.
	(_Spec::_M_reserved2): Removed.
	(_Spec::_M_parse_fill_and_align, _Spec::_M_parse_sign)
	(__format::__write_padded_as_spec): Adjusted default value checks.
	(__format::_Term_char): Add using enum and adjust enumertors.
	(__Escapes::_S_term): Adjusted for _Term_char values.
	(__format::__should_escape_ascii): Adjusted _Term_char uses.
	(__format::__write_escaped): Adjusted for _Term_char.
	(__formatter_str::parse): Set _Pres_s if specifed and _M_debug
	instead of _Pres_esc.
	(__formatter_str::set_debug_format): Set _M_debug instead of
	_Pres_esc.
	(__formatter_str::format, __formatter_str::_M_format_range):
	Check _M_debug instead of _Prec_esc.
	(__formatter_str::_M_format_escaped): Adjusted _Term_char uses.
	(__formatter_int::__formatter_int(_Spec<_CharT>)): Set _Pres_d if
	default presentation type is not set.
	(__formatter_int::_M_parse): Adjusted default value checks.
	(__formatter_int::_M_do_parse): Set _M_debug instead of _Pres_esc.
	(__formatter_int::_M_format_character): Handle escaped presentation.
	(__formatter_int::_M_format_character_escaped)
	(__formatter_int::_S_character_width): Merged into
	_M_format_character.
	(__formatter_ptr::__formatter_ptr(_Spec<_CharT>)): Set _Pres_p if
	default presentation type is not set.
	(__formatter_ptr::parse): Add default __type parameter, store _Pres_p,
	and handle _M_alt to be consistent with meaning for integers.
	(__foramtter_ptr<_CharT>::_M_set_default): Define.
	(__format::__pack_arg_types, std::basic_format_args): Add necessary
	casts.
	(formatter<_CharT, _CharT>::set_debug_format)
	(formatter<char, wchar_t>::set_debug_format): Set _M_debug instead of
	_Pres_esc.
	(formatter<_CharT, _CharT>::format, formatter<char, wchar_t>::format):
	Simplify calls to _M_format_character.
	(range_formatter<_Rg, _CharT>::parse): Replace _Pres_str with
	_Pres_s and set _M_debug instead of _Pres_esc.
	(range_formatter<_Rg, _CharT>::format): Replace _Pres_str with
	_Pres_s.

2025-05-20  Jonathan Wakely  <jwakely@redhat.com>

	* doc/xml/faq.xml: Update URL for archived SGI STL docs.
	* doc/xml/manual/containers.xml: Likewise.
	* doc/xml/manual/extensions.xml: Likewise.
	* doc/xml/manual/using.xml: Likewise.
	* doc/xml/manual/utilities.xml: Likewise.
	* doc/html/*: Regenerate.

2025-05-19  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/ranges (_ZipTransform::operator()): Remove name of
	unused parameter.
	(chunk_view::_Iterator, stride_view::_Iterator): Likewise.
	(join_with_view): Declare _Iterator and _Sentinel as class
	instead of struct.
	(repeat_view): Declare _Iterator as class instead of struct.

2025-05-19  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/120293
	* include/bits/chrono_io.h (_M_format_to_ostream): Add special
	case for local_time convertible to local_days.
	* testsuite/std/time/clock/local/io.cc: Check formatting of
	chrono::local_days.

2025-05-16  Patrick Palka  <ppalka@redhat.com>

	* include/std/type_traits (__is_invocable): Define in terms of
	corresponding builtin if available.
	(__is_nothrow_invocable): Likewise.
	(is_invocable_v): Likewise.
	(is_nothrow_invocable_v): Likewise.

2025-05-16  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/65909
	* testsuite/lib/libstdc++.exp (check_v3_target_namedlocale):
	Change name of formal argument to locale.

2025-05-15  Luc Grosheintz  <luc.grosheintz@gmail.com>

	* include/std/mdspan: Implement the mandate for extents as
	signed or unsigned integer and not any interal type. Remove
	leading underscores from names in static_assert message.
	* testsuite/23_containers/mdspan/extents/class_mandates_neg.cc:
	Check that extents<char,...> and extents<bool,...> are invalid.
	Adjust dg-prune-output pattern.
	* testsuite/23_containers/mdspan/extents/misc.cc: Update
	tests to avoid `char` and `bool` as IndexType.

2025-05-15  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/120190
	* include/std/format (format_kind): Adjust primary template to
	not depend on itself.
	* testsuite/std/format/ranges/format_kind_neg.cc: Adjust
	expected errors. Check more invalid specializations.

2025-05-15  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/complex (arg(T)): Use __builtin_signbit instead of
	std::signbit.

2025-05-15  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/120235
	* doc/html/*: Regenerate.
	* doc/xml/manual/evolution.xml: Document deprecation.
	* include/std/complex: Replace references to TR1 subclauses with
	corresponding C++11 subclauses.
	(fabs): Add deprecated attribute.
	* testsuite/26_numerics/complex/fabs_neg.cc: New test.

2025-05-15  Jason Merrill  <jason@redhat.com>

	* testsuite/lib/libstdc++.exp: Add -Wabi.

2025-05-15  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/119246
	* include/std/format: Updated check for _GLIBCXX_FORMAT_F128.

2025-05-14  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/119125
	* include/bits/move_only_function.h: Move to...
	* include/bits/funcwrap.h: ...here.
	* doc/doxygen/stdheader.cc (init_map): Replaced move_only_function.h
	with funcwrap.h, and changed include guard to use feature test macro.
	Move bits/version.h include before others.
	* include/Makefile.am: Likewise.
	* include/Makefile.in: Likewise.
	* include/std/functional: Likewise.

2025-05-14  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/119125
	* doc/doxygen/stdheader.cc: Addded cpyfunc_impl.h header.
	* include/Makefile.am: Add bits cpyfunc_impl.h.
	* include/Makefile.in: Add bits cpyfunc_impl.h.
	* include/bits/cpyfunc_impl.h: New file.
	* include/bits/mofunc_impl.h: Mention LWG 4255.
	* include/bits/move_only_function.h: Update header description
	and change guard to also check __glibcxx_copyable_function.
	(_Manager::_Func): Remove noexcept.
	(std::__is_polymorphic_function_v<move_only_function<_Tp>>)
	(__variant::_Never_valueless_alt<std::move_only_function<_Signature...>>)
	(move_only_function) [__glibcxx_move_only_function]: Adjust guard.
	(std::__is_polymorphic_function_v<copyable_function<_Tp>>)
	(__variant::_Never_valueless_alt<std::copyable_function<_Signature...>>)
	(__polyfunc::_Cpy_base, std::copyable_function)
	[__glibcxx_copyable_function]: Define.
	* include/bits/version.def: Define copyable_function.
	* include/bits/version.h: Regenerate.
	* include/std/functional: Define __cpp_lib_copyable_function.
	* src/c++23/std.cc.in (copyable_function)
	[__cpp_lib_copyable_function]: Export.
	* testsuite/20_util/copyable_function/call.cc: New test based on
	move_only_function tests.
	* testsuite/20_util/copyable_function/cons.cc: New test based on
	move_only_function tests.
	* testsuite/20_util/copyable_function/conv.cc: New test based on
	move_only_function tests.
	* testsuite/20_util/copyable_function/copy.cc: New test.
	* testsuite/20_util/copyable_function/move.cc: New test based on
	move_only_function tests.

2025-05-14  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/119125
	* include/bits/mofunc_impl.h: (std::move_only_function): Adjusted for
	changes in bits/move_only_function.h
	(move_only_function::move_only_function(_Fn&&)): Special case
	move_only_functions with same invoker.
	(move_only_function::operator=(move_only_function&&)): Handle self
	assigment.
	* include/bits/move_only_function.h (__polyfunc::_Ptrs)
	(__polyfunc::_Storage): Refactored from _Mo_func::_Storage.
	(__polyfunc::__param_t): Moved from move_only_function::__param_t.
	(__polyfunc::_Base_invoker, __polyfunc::_Invoke): Refactored from
	move_only_function::_S_invoke.
	(__polyfunc::_Manager): Refactored from _Mo_func::_S_manager.
	(std::_Mofunc_base): Moved into __polyfunc::_Mo_base with parts
	extracted to __polyfunc::_Storage and __polyfunc::_Manager.
	(__polyfunc::__deref_as, __polyfunc::__invoker_of)
	(__polyfunc::__base_of, __polyfunc::__is_invoker_convertible): Define.
	(std::__is_move_only_function_v): Renamed to
	__is_polymorphic_function_v.
	(std::__is_polymorphic_function_v): Renamed from
	__is_move_only_function_v.
	* testsuite/20_util/move_only_function/call.cc: Test for
	functions pointers.
	* testsuite/20_util/move_only_function/conv.cc: New test.
	* testsuite/20_util/move_only_function/move.cc: Tests for
	self assigment.

2025-05-14  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/119246
	* include/std/format (__format::__bflt16_t): Define.
	(_GLIBCXX_FORMAT_F128): Separate value for cases where _Float128
	is used.
	(__format::__float128_t): Renamed to __format::__flt128_t.
	(std::formatter<_Float128, _CharT>): Define always if there is
	formattable 128bit float.
	(std::formatter<__float128, _CharT>): Define.
	(_Arg_type::_Arg_f128): Rename to _Arg_float128 and adjust value.
	(_Arg_type::_Arg_ibm128): Change value to _Arg_ldbl.
	(_Arg_type::_Arg_ieee128): Define as alias to _Arg_float128.
	(_Arg_value::_M_f128): Replaced with _M_ieee128 and _M_float128.
	(_Arg_value::_M_ieee128, _Arg_value::_M_float128)
	(_Arg_value::_M_bf16, _Arg_value::_M_f16, _Arg_value::_M_f32)
	(_Arg_value::_M_f64): Define.
	(_Arg_value::_S_get, basic_format_arg::_S_to_enum): Handle __bflt16,
	_Float16, _Float32, _Float64, and __float128 types.
	(basic_format_arg::_S_to_arg_type): Preserve _bflt16, _Float16,
	_Float32, _Float64 and __float128 types.
	(basic_format_arg::_M_visit): Handle _Arg_float128, _Arg_ieee128,
	_Arg_b16, _Arg_f16, _Arg_f32, _Arg_f64.
	* testsuite/std/format/arguments/args.cc: Updated to illustrate
	that extended floating point types use handles now. Added test
	for __float128.
	* testsuite/std/format/parse_ctx.cc: Extended test to cover class
	to check_dynamic_spec with floating point types and handles.

2025-05-14  Ville Voutilainen  <ville.voutilainen@gmail.com>

	* include/std/utility (to_underlying): Add the __always_inline__ attribute.

2025-05-12  Thomas Schwinge  <tschwinge@baylibre.com>

	PR target/119645
	* configure.host [GCN, nvptx] (atomicity_dir): Don't set.

2025-05-12  Patrick Palka  <ppalka@redhat.com>

	PR libstdc++/119714
	PR libstdc++/112490
	* include/std/expected (expected::operator==): Replace
	non-dependent std::expected function parameter with a dependent
	one of type expected<_Vp, _Er> where _Vp matches _Tp.
	* testsuite/20_util/expected/119714.cc: New test.

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

	PR libstdc++/120187
	* include/c_global/ciso646: Only give deprecated warning for
	C++20 and later.
	* include/c_global/ccomplex: Add @since to Doxygen comment.
	* include/c_global/cstdalign: Likewise.
	* include/c_global/cstdbool: Likewise.
	* include/c_global/ctgmath: Likewise.
	* testsuite/18_support/headers/ciso646/macros.cc: Remove
	dg-warning for c++17_only effective target.
	* testsuite/18_support/headers/ciso646/macros-2.cc: New test.

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

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

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  Thomas Schwinge  <tschwinge@baylibre.com>

	PR libstdc++/70560
	PR libstdc++/119667
	* acinclude.m4 (GLIBCXX_ENABLE_BACKTRACE): Use '__SIZE_TYPE__'
	instead of 'size_t'.
	* configure: Regenerate.

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

	PR libstdc++/118260
	* python/hook.in: Suppress output from gdb.execute calls to
	register skips.

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

	* doc/xml/manual/status_cxx2017.xml: Update status for
	std::to_chars and std::from_chars.
	* doc/html/manual/*: Regenerate.

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

	PR libstdc++/65909
	* testsuite/lib/libstdc++.exp (check_v3_target_namedlocale):
	Hardcode the locale name instead of passing it to the
	executable. Do not hardcode buffer size for string.

2025-05-10  Alexandre Oliva  <oliva@adacore.com>

	* src/c++23/print.cc [__VXWORKS__]: Include ioLib.h.

2025-05-09  Tomasz Kamiński  <tkaminsk@redhat.com>

	* include/bits/chrono_io.h (__formatter_chrono::_M_format_to):
	Extracted from _M_format.
	(__formatter_chrono::_M_format): Use _Padding_sink and delegate
	to _M_format_to.

2025-05-09  Tomasz Kamiński  <tkaminsk@redhat.com>

	* include/std/format (__Sink_iter<_CharT>::_M_discarding)
	(__Sink<_CharT>::_M_discarding, _Iter_sink<_CharT, _OutIter>::_M_discarding)
	(_Padding_sinl<_CharT, _Out>::_M_padwidth)
	(_Padding_sink<_CharT, _Out>::_M_maxwidth): Remove const.
	(_Padding_sink<_CharT, _Out>::_M_sync_discarding)
	(_Padding_sink<_CharT, _Out>::_M_discarding): Define.
	(_Padding_sink<_CharT, _Out>::_Padding_sink(_Out, size_t, size_t))
	(_Padding_sink<_CharT, _Out>::_M_force_update):
	(_Padding_sink<_CharT, _Out>::_M_flush): Call _M_sync_discarding.
	(_Padding_sink<_CharT, _Out>::_Padding_sink(_Out, size_t)): Delegate.

2025-05-07  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/120159
	* src/c++23/std.cc.in (is_layout_compatible_v): Export.

2025-05-07  Jonathan Wakely  <jwakely@redhat.com>

	* src/c++23/std.cc.in: Fix export for std::extents.

2025-05-07  Luc Grosheintz  <luc.grosheintz@gmail.com>

	* testsuite/23_containers/mdspan/extents/class_mandates_neg.cc: New test.
	* testsuite/23_containers/mdspan/extents/ctor_copy.cc: New test.
	* testsuite/23_containers/mdspan/extents/ctor_ints.cc: New test.
	* testsuite/23_containers/mdspan/extents/ctor_shape.cc: New test.
	* testsuite/23_containers/mdspan/extents/custom_integer.cc: New test.
	* testsuite/23_containers/mdspan/extents/misc.cc: New test.

2025-05-07  Luc Grosheintz  <luc.grosheintz@gmail.com>

	PR libstdc++/107761
	* include/std/mdspan (extents): New class.
	* src/c++23/std.cc.in: Add 'using std::extents'.

2025-05-07  Luc Grosheintz  <luc.grosheintz@gmail.com>

	* doc/doxygen/user.cfg.in: Add <mdspan>.
	* include/Makefile.am: Ditto.
	* include/Makefile.in: Ditto.
	* include/precompiled/stdc++.h: Ditto.
	* include/std/mdspan: New file.

2025-05-07  Luc Grosheintz  <luc.grosheintz@gmail.com>

	* include/bits/version.def: Add internal feature testing macro
	__glibcxx_mdspan.
	* include/bits/version.h: Regenerate.

2025-05-07  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/120114
	* include/bits/chrono_io.h (__formatter_chrono::_M_format): Use __field_width.
	* testsuite/std/time/format/pr120114.cc: New test.

2025-05-07  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/120147
	* acinclude.m4 (GLIBCXX_ENABLE_BACKTRACE): Restore use of
	AC_LANG_CPLUSPLUS.
	* configure: Regenerate.

2025-05-06  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/70560
	PR libstdc++/119667
	* acinclude.m4 (GLIBCXX_ENABLE_ATOMIC_BUILTINS): Only check for
	__atomic_fetch_add on _Atomic_word. Define new macro
	_GLIBCXX_ATOMIC_WORD_BUILTINS and stop defining macro
	_GLIBCXX_ATOMIC_BUILTINS.
	(GLIBCXX_ENABLE_BACKTRACE): Check for __atomic_load_n and
	__atomic_store_n on int, void* and size_t.
	* config.h.in: Regenerate.
	* configure: Regenerate.
	* configure.host: Fix typo in comment.
	* include/ext/atomicity.h (__exchange_and_add, __atomic_add):
	Depend on _GLIBCXX_ATOMIC_WORD_BUILTINS macro instead of old
	_GLIBCXX_ATOMIC_BUILTINS macro.

2025-05-06  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/117905
	* include/pstl/glue_numeric_impl.h (reduce, transform_reduce)
	(transform_reduce, inclusive_scan, transform_exclusive_scan)
	(transform_inclusive_scan): Use std::move for __init parameter.
	* include/pstl/numeric_impl.h (__brick_transform_reduce)
	(__pattern_transform_reduce, __brick_transform_scan)
	(__pattern_transform_scan): Likewise.
	* include/std/numeric (inclusive_scan, transform_exclusive_scan):
	Use std::move to create local copy of the first element.
	* testsuite/26_numerics/pstl/numeric_ops/108236.cc: Move test
	using move-only type to ...
	* testsuite/26_numerics/pstl/numeric_ops/move_only.cc: New test.

2025-05-06  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/120029
	* src/c++17/fs_path.cc (path::operator+=(const path&)): Handle
	parameters that alias the path or one of its components.
	* testsuite/27_io/filesystem/path/concat/120029.cc: New test.
	* testsuite/experimental/filesystem/path/concat/120029.cc: New
	test.

2025-05-06  Jonathan Wakely  <jwakely@redhat.com>

	PR c++/120112
	* include/bits/ptr_traits.h (_Safe_iterator_base): Use class
	keyword in class-head of declaration.
	* include/debug/debug.h (_Safe_iterator): Likewise.

2025-05-06  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/stl_iterator.h (counted_iterator): Add noexcept
	to friend operators which only access the _M_length member.

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.

2025-05-02  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/23_containers/vector/allocator/default_init.cc:
	Add a check using constant evaluation.
	* testsuite/23_containers/vector/bool/allocator/default_init.cc:
	Likewise.
	* testsuite/util/testsuite_allocator.h (default_init_allocator):
	Make all member functions and equality ops constexpr.

2025-05-02  Jonathan Wakely  <jwakely@redhat.com>

	* src/c++11/Makefile.am: Simplify existing prerequisites for wchar and
	dual-abi targets that are built from other sources. Add similar
	prerequisites for more wchar and dual-abi files.
	* src/c++11/Makefile.in: Regenerate.
	* src/c++17/Makefile.am [ENABLE_DUAL_ABI]: Add prerequisites for
	dual-abi targets that are built from other sources.
	* src/c++17/Makefile.in: Regenerate.

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/aligned_storage/value.cc [_GLIBCXX_INLINE_VERSION]:
	Avoid align_msa check.
	* 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.

2025-04-30  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/109162
	* include/std/format (_Padding_sink::_M_update): Fixed condition for
	calling _M_force_update.
	* testsuite/std/format/debug.cc: Add test that reproduces this issue
	on 64bit architecture.
	* testsuite/std/format/ranges/sequence.cc: Another edge value test.

2025-04-29  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/version.def (make_obj_using_allocator): Use
	no_stdname.
	* include/bits/version.h: Regenerate.

2025-04-29  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/regex_compiler.h: Replace _GLIBCXX17_CONSTEXPR
	with constexpr and disable diagnostics with pragmas.
	(_AnyMatcher::operator()): Use constexpr-if instead of tag
	dispatching. Postpone calls to _M_translate until after checking
	result of earlier calls.
	(_AnyMatcher::_M_apply): Remove both overloads.
	(_BracketMatcher::operator(), _BracketMatcher::_M_ready):
	Replace tag dispatching with 'if constexpr'.
	(_BracketMatcher::_M_apply(_CharT, true_type)): Remove.
	(_BracketMatcher::_M_apply(_CharT, false_type)): Remove second
	parameter.
	(_BracketMatcher::_M_make_cache): Remove both overloads.
	* include/bits/regex_compiler.tcc (_BracketMatcher::_M_apply):
	Remove second parameter.
	* include/bits/regex_executor.tcc: Replace _GLIBCXX17_CONSTEXPR
	with constexpr and disable diagnostics with pragmas.
	(_Executor::_M_handle_backref): Replace __glibcxx_assert with
	static_assert.
	(_Executor::_M_handle_accept): Mark _S_opcode_backref case as
	unreachable for non-DFS mode and do not instantiate
	_M_handle_backref for that case.

2025-04-29  Barnabás Pőcze  <pobrn@protonmail.com>

	PR libstdc++/112934
	* include/bits/stl_map.h (map::erase): Use _M_erase_unique.
	* include/bits/stl_set.h (set::erase): Likewise.
	* include/bits/stl_tree.h (_Rb_tree::_M_erase_unique): Add.

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

	PR libstdc++/119427
	* include/std/flat_map (_Flat_map_impl::erase_if): Replace
	this hidden friend with ...
	(_Flat_map_impl::_M_erase_if): ... this member function.
	(flat_map): Export _Flat_map_impl::_M_erase_if.
	(erase_if(flat_map)): Define.
	(flat_multimap): Export _Flat_map_impl::_M_erase_if.
	(erase_if(flat_multimap)): Define.
	* include/std/flat_set (_Flat_set_impl::erase_if): Replace
	with ...
	(_Flat_set_impl::_M_erase_if): ... this member function.
	(flat_set): Export _Flat_set_impl::_M_erase_if.
	(erase_if(flat_set)): Define.
	(flat_multiset): Export _Flat_set_impl::_M_erase_if.
	(erase_if(flat_multiset)): Define.
	* testsuite/23_containers/flat_map/1.cc (test07): New test.
	* testsuite/23_containers/flat_multimap/1.cc (test07): New test.
	* testsuite/23_containers/flat_multiset/1.cc (test09): New test.
	* testsuite/23_containers/flat_set/1.cc (test09): New test.

2025-04-29  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/char_traits.h (char_traits::assign): Use
	constexpr-if unconditionally for C++11 and C++14.
	* include/bits/locale_conv.h (__do_str_codecvt): Likewise.
	* include/bits/ostream.h (basic_ostream::_S_cast_flt): Likewise.
	* include/bits/random.tcc (shuffle_order_engine::operator())
	(seed_seq::seed_seq(Iter, Iter)): Likewise.
	* include/bits/shared_ptr_base.h (_Sp_counted_base::_M_release):
	Likewise.
	* include/bits/stl_tree.h (_Rb_tree::_M_move_data): Likewise.
	* include/bits/uniform_int_dist.h
	(uniform_int_distribution::operator()): Likewise.
	* include/bits/valarray_array.h (__valarray_default_construct)
	(__valarray_fill_construct, __valarray_copy_construct)
	(__valarray_copy_construct, __valarray_destroy_elements):
	Likewise.
	* include/experimental/numeric (lcm): Likewise.
	* include/std/bit (__rotl, __rotr, __countl_zero, __countr_zero)
	(__popcount, __bit_ceil) Likewise.:
	* include/std/bitset (operator>>): Likewise.
	* include/std/charconv (__to_chars_8, __to_chars_i)
	(__from_chars_alnum_to_val, from_chars): Likewise.
	* include/tr2/dynamic_bitset (__dynamic_bitset_base): Likewise.
	* testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error
	line number.

2025-04-29  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/std_function.h (_Target_handler): Remove.
	(function::target): Use constexpr-if for C++11 and
	C++14, with diagnostic pragmas to suppress warnings.

2025-04-29  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/stl_vector.h (_S_do_relocate): Remove.
	(_S_relocate): Remove tag dispatching path.
	* include/bits/vector.tcc (reserve, _M_realloc_insert)
	(_M_realloc_append, _M_default_append): Add diagnostic pragmas
	and use 'if constexpr' in C++11 and C++14. Call
	std::__relocate_a directly instead of _S_relocate.

2025-04-29  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/basic_string.h (operator+(string&&, string&&)):
	Do not assume that COW strings have equal allocators. Use
	constexpr-if unconditionally.
	* testsuite/21_strings/basic_string/allocator/char/operator_plus.cc:
	Remove cxx11_abi effective-target check.
	* testsuite/21_strings/basic_string/allocator/wchar_t/operator_plus.cc:
	Likewise.

2025-04-28  Giuseppe D'Angelo  <giuseppe.dangelo@kdab.com>

	* testsuite/20_util/shared_ptr/requirements/1.cc: Test both
	shared_ptr and weak_ptr.
	Add more tests.
	* testsuite/20_util/weak_ptr/requirements/1.cc: Removed as
	superseded by the other test.

2025-04-28  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/119970
	* include/std/ostream (vprint_unicode) [_WIN32 && !__CYGWIN__]: Call
	_Str_sink::_M_span instead of view.
	* include/std/print (vprint_unicode) [_WIN32 && !__CYGWIN__]: Call
	_Str_sink::_M_span instead of view.

2025-04-28  Tomasz Kamiński  <tkaminsk@redhat.com>

	* include/bits/ranges_base.h (__detail::__range_key_type):
	Replace remove_const_t with remove_cvref_t.
	(__detail::__range_mapped_type): Apply remove_cvref_t.
	* include/bits/stl_iterator.h: (__detail::__iter_key_t):
	Replace remove_const_t with __remove_cvref_t.
	(__detail::__iter_val_t): Apply __remove_cvref_t.
	* testsuite/23_containers/flat_map/1.cc: New tests.
	* testsuite/23_containers/flat_multimap/1.cc: New tests.
	* testsuite/23_containers/map/cons/deduction.cc: New tests.
	* testsuite/23_containers/map/cons/from_range.cc: New tests.
	* testsuite/23_containers/multimap/cons/deduction.cc: New tests.
	* testsuite/23_containers/multimap/cons/from_range.cc: New tests.
	* testsuite/23_containers/unordered_map/cons/deduction.cc: New tests.
	* testsuite/23_containers/unordered_map/cons/from_range.cc: New tests.
	* testsuite/23_containers/unordered_multimap/cons/deduction.cc:
	New tests.
	* testsuite/23_containers/unordered_multimap/cons/from_range.cc:
	New tests.

2025-04-28  Tomasz Kamiński  <tkaminsk@redhat.com>

	* include/bits/unordered_map.h (unordered_map):
	Define constructors accepting:
	(_InputIterator, _InputIterator, const allocator_type&),
	(initializer_list<value_type>, const allocator_type&),
	(unordered_multimap): Likewise.
	* include/debug/unordered_map (unordered_map): Likewise.
	(unordered_multimap): Likewise.
	* include/bits/unordered_set.h (unordered_set):
	Define constructors and deduction guide accepting:
	(_InputIterator, _InputIterator, const allocator_type&),
	(initializer_list<value_type>, const allocator_type&),
	(unordered_multiset): Likewise.
	* include/debug/unordered_set (unordered_set): Likewise.
	(unordered_multiset): Likewise.
	* testsuite/23_containers/unordered_map/cons/66055.cc: New tests.
	* testsuite/23_containers/unordered_map/cons/deduction.cc: New tests.
	* testsuite/23_containers/unordered_multimap/cons/66055.cc: New tests.
	* testsuite/23_containers/unordered_multimap/cons/deduction.cc:	New
	tests.
	* testsuite/23_containers/unordered_multiset/cons/66055.cc: New tests.
	* testsuite/23_containers/unordered_multiset/cons/deduction.cc:	New
	tests.
	* testsuite/23_containers/unordered_set/cons/66055.cc: New tests.
	* testsuite/23_containers/unordered_set/cons/deduction.cc: New tests.

2025-04-25  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/ptr_traits.h (to_address): Use markdown for
	formatting in Doxygen comments.

2025-04-25  Jonathan Wakely  <jwakely@redhat.com>

	* src/c++11/Makefile.am: Add prerequisites for targets that
	depend on string-inst.cc.
	* src/c++11/Makefile.in: Regenerate.

2025-04-25  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/move.h (addressof): Use __builtin_addressof
	directly.

2025-04-25  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/tr1/2_general_utilities/shared_ptr/cons/43820_neg.cc:
	Remove dg-error directives for additional c++26 errors.

2025-04-25  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/latch (latch::_M_a): Rename to _M_counter.

2025-04-25  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/109162
	* include/bits/formatfwd.h (__simply_formattable_range): Moved from
	std/format.
	* include/std/format (__formatter_str::_format): Extracted escaped
	string handling to separate method...
	(__formatter_str::_M_format_escaped): Use __Padding_sink.
	(__formatter_str::_M_format): Adjusted implementation.
	(__formatter_str::_S_trunc): Extracted as namespace function...
	(__format::_truncate): Extracted from __formatter_str::_S_trunc.
	(__format::_Seq_sink): Removed forward declarations, made members
	protected and non-final.
	(_Seq_sink::_M_trim): Define.
	(_Seq_sink::_M_span): Renamed from view.
	(_Seq_sink::view): Returns string_view instead of span.
	(__format::_Str_sink): Moved after _Seq_sink.
	(__format::__format_padded): Use _Padding_sink.
	* testsuite/std/format/debug.cc: Add timeout and new tests.
	* testsuite/std/format/ranges/sequence.cc: Specify unicode as
	encoding and new tests.
	* testsuite/std/format/ranges/string.cc: Likewise.
	* testsuite/std/format/tuple.cc: Likewise.

2025-04-25  Tomasz Kamiński  <tkaminsk@redhat.com>

	* testsuite/std/format/ranges/adaptors.cc: Updated test.

2025-04-25  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/22_locale/ctype/is/string/89728_neg.cc: Remove
	dg-error for c++98_only effective target.

2025-04-25  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/119918
	* include/bits/formatfwd.h (__format::_Align): Moved from std/format.
	(std::__throw_format_error, __format::__formatter_str)
	(__format::__formatter_ptr): Declare.
	* include/std/format (__format::_Align): Moved to bits/formatfwd.h.
	(__formatter_int::__formatter_int): Define.
	(__format::__formatter_ptr): Extracted from formatter for const void*.
	(std::formatter<const void*, _CharT>, formatter<void*, _CharT>)
	(std::formatter<nullptr_t, _CharT>): Delegate to __formatter_ptr<_CharT>.
	* include/std/thread (std::formatter<thread::id, _CharT>): Constrain
	_CharT template parameter.
	(formatter<thread::id, _CharT>::parse): Specify default aligment, and
	qualify __throw_format_error to disable ADL.
	(formatter<thread::id, _CharT>::format): Use formatters to write directly
	to output.
	* testsuite/30_threads/thread/id/output.cc: Tests for formatting thread::id
	representing not-a-thread with padding and formattable concept.

2025-04-25  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/109162
	* include/bits/version.def (format_ranges): Remove no_stdname and
	update value.
	* include/bits/version.h: Regenerate.
	* src/c++23/std.cc.in: Replace __glibcxx_format_ranges with
	__cpp_lib_format_ranges.
	* testsuite/std/format/formatter/lwg3944.cc: Likewise.
	* testsuite/std/format/parse_ctx.cc: Likewise.
	* testsuite/std/format/string.cc: Likewise.
	* testsuite/std/format/ranges/feature_test.cc: New test.

2025-04-25  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/109162
	* include/bits/formatfwd.h (__format::__parsable_with)
	(__format::__formattable_with, __format::__formattable_impl)
	(__format::__has_debug_format, __format::__const_formattable_range)
	(__format::__maybe_const_range, __format::__maybe_const)
	(std::formattable): Moved from std/format.
	(__format::Iter_for, std::range_formatter): Forward declare.
	* include/bits/stl_queue.h (std::formatter): Forward declare.
	(std::queue, std::priority_queue): Befriend formatter specializations.
	* include/bits/stl_stack.h (std::formatter): Forward declare.
	(std::stack): Befriend formatter specializations.
	* include/std/format (__format::_Iter_for): Define as struct with
	(__format::__parsable_with, __format::__formattable_with)
	(__format::__formattable_impl, __format::__has_debug_format)
	(_format::__const_formattable_range, __format::__maybe_const_range)
	(__format::__maybe_const, std::formattable): Moved to bits/formatfwd.h.
	(std::range_formatter): Remove default argument specified in declaration
	in bits/formatfwd.h.
	* include/std/queue: Include bits/version.h before bits/stl_queue.h.
	(formatter<queue<_Tp, _Container, _Compare>, _CharT>)
	(formatter<priority_queue<_Tp, _Container, _Compare>, _CharT>): Define.
	* include/std/stack: Include bits/version.h before bits/stl_stack.h
	(formatter<stack<_Tp, _Container, _Compare>, _CharT>): Define.
	* testsuite/std/format/ranges/adaptors.cc: New test.

2025-04-25  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/future (__future_base::_Task_state): Check
	invocable requirement here.
	(__future_base::_Task_state::_S_create): New static member
	function.
	(__future_base::_Task_state::_M_reset): Use _S_create.
	(__create_task_state): Remove.
	(packaged_task): Use _Task_state::_S_create instead of
	__create_task_state.
	* testsuite/30_threads/packaged_task/cons/dangling_ref.cc:
	Adjust dg-error patterns.
	* testsuite/30_threads/packaged_task/cons/lwg4154_neg.cc:
	Likewise.

2025-04-25  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/stl_tree.h (_Rb_tree::_M_key_compare): New member
	function to invoke comparison function.
	(_Rb_tree): Use new member function instead of accessing the
	comparison function directly.

2025-04-24  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/23_containers/forward_list/48101_neg.cc: Remove
	dg-prune-output that doesn't match anything.
	* testsuite/23_containers/list/48101_neg.cc: Likewise.
	* testsuite/23_containers/multiset/48101_neg.cc: Likewise.
	* testsuite/23_containers/set/48101_neg.cc: Likewise.

2025-04-24  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/generator (generator::yield_value): Add overload
	taking lvalue element_of view, as per LWG 3899.
	* testsuite/24_iterators/range_generators/lwg3899.cc: New test.

2025-04-24  François Dumont  <frs.dumont@gmail.com>

	* testsuite/util/replacement_memory_operators.h: Adapt for -fno-exceptions
	context.
	* testsuite/23_containers/deque/capacity/shrink_to_fit.cc: Adapt test
	to check std::deque shrink_to_fit method.

2025-04-23  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.
	* config/abi/post/powerpc64-linux-gnu/baseline_symbols.txt: Update.

2025-04-23  ZENG Hao  <c@cyano.cn>

	* src/c++23/std.cc.in (atomic_signed_lock_free): Guard with
	preprocessor check for __cpp_lib_atomic_lock_free_type_aliases.
	(atomic_unsigned_lock_free): Likewise.

2025-04-22  Patrick Palka  <ppalka@redhat.com>

	Revert:
	2024-08-22  Patrick Palka  <ppalka@redhat.com>

	* include/bits/iterator_concepts.h (__detail::__projected): Define
	an optimized partial specialization for when the projection is
	std::identity.
	* testsuite/24_iterators/indirect_callable/projected.cc: Verify the
	optimization.

2025-04-22  Andreas Schwab  <schwab@linux-m68k.org>

	* config/abi/post/m68k-linux-gnu/baseline_symbols.txt: Update.

2025-04-22  Andreas Schwab  <schwab@linux-m68k.org>

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

2025-04-22  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>

	* config/abi/post/sparc64-linux-gnu/baseline_symbols.txt: Regenerate.
	* config/abi/post/sparc64-linux-gnu/32/baseline_symbols.txt: Likewise.

2025-04-22  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.

2025-04-22  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/aarch64-linux-gnu/baseline_symbols.txt: Update.
	* config/abi/post/s390x-linux-gnu/baseline_symbols.txt: Update.
	* config/abi/post/powerpc64le-linux-gnu/baseline_symbols.txt: Update.

2025-04-22  Tomasz Kamiński  <tkaminsk@redhat.com>

	* testsuite/23_containers/flat_map/1.cc: Add dg-timeout-factor 2.
	* testsuite/23_containers/flat_multimap/1.cc: Likewise.
	* testsuite/std/format/ranges/map.cc: Likewise.
	* testsuite/std/format/ranges/sequence.cc: Likewise.
	* testsuite/std/format/ranges/string.cc: Likewise.

2025-04-22  Andreas Schwab  <schwab@linux-m68k.org>

	* testsuite/util/testsuite_abi.cc (check_version): Update latestp
	to use GLIBCXX_3.4.35 and CXXABI_1.3.17.

2025-04-18  François Dumont  <frs.dumont@gmail.com>

	* testsuite/util/debug/unordered_checks.h (fill_container): New helper method.
	(use_erased_local_iterator, invalid_local_iterator_pre_increment)
	(invalid_local_iterator_post_increment, invalid_local_iterator_compare)
	(invalid_local_iterator_range): Use latter.
	(fill_and_get_local_iterator): New, use fill_container.
	(use_invalid_local_iterator): Use latter.
	(invalid_local_iterator_arrow_operator): New test function.
	(invalid_local_iterator_copy_instantiation): New test function.
	(invalid_local_iterator_move_instantiation): New test function.
	(invalid_local_iterator_copy_assignment): New test function.
	(invalid_local_iterator_move_assignment): New test function.
	(invalid_local_iterator_const_conversion): New test function.
	* testsuite/23_containers/unordered_map/debug/invalid_local_iterator_arrow_operator_neg.cc:
	New test case.
	* testsuite/23_containers/unordered_map/debug/invalid_local_iterator_const_conversion_neg.cc:
	New test case.
	* testsuite/23_containers/unordered_map/debug/invalid_local_iterator_copy_assignment_neg.cc:
	New test case.
	* testsuite/23_containers/unordered_map/debug/invalid_local_iterator_copy_construction_neg.cc:
	New test case.
	* testsuite/23_containers/unordered_map/debug/invalid_local_iterator_move_assignment_neg.cc:
	New test case.
	* testsuite/23_containers/unordered_map/debug/invalid_local_iterator_move_construction_neg.cc:
	New test case.
	* testsuite/23_containers/unordered_map/debug/max_load_factor_neg.cc: Test unordered_map.
	* testsuite/23_containers/unordered_multimap/debug/begin2_neg.cc: Test unordered_multimap.
	* testsuite/23_containers/unordered_multimap/debug/bucket_size_neg.cc: Likewise.
	* testsuite/23_containers/unordered_multimap/debug/cbegin_neg.cc: Likewise.
	* testsuite/23_containers/unordered_multimap/debug/cend_neg.cc: Likewise.
	* testsuite/23_containers/unordered_multimap/debug/end1_neg.cc: Likewise.
	* testsuite/23_containers/unordered_multimap/debug/end2_neg.cc: Likewise.
	* testsuite/23_containers/unordered_multimap/debug/invalid_local_iterator_arrow_operator_neg.cc:
	New test case.
	* testsuite/23_containers/unordered_multimap/debug/invalid_local_iterator_const_conversion_neg.cc:
	New test case.
	* testsuite/23_containers/unordered_multimap/debug/invalid_local_iterator_copy_assignment_neg.cc:
	New test case.
	* testsuite/23_containers/unordered_multimap/debug/invalid_local_iterator_copy_construction_neg.cc:
	New test case.
	* testsuite/23_containers/unordered_multimap/debug/invalid_local_iterator_move_assignment_neg.cc:
	New test case.
	* testsuite/23_containers/unordered_multimap/debug/invalid_local_iterator_move_construction_neg.cc:
	New test case.
	* testsuite/23_containers/unordered_multimap/debug/max_load_factor_neg.cc:
	Test unordered_multimap.
	* testsuite/23_containers/unordered_multiset/debug/invalid_local_iterator_arrow_operator_neg.cc:
	New test case.
	* testsuite/23_containers/unordered_multiset/debug/invalid_local_iterator_const_conversion_neg.cc:
	New test case.
	* testsuite/23_containers/unordered_multiset/debug/invalid_local_iterator_copy_assignment_neg.cc:
	New test case.
	* testsuite/23_containers/unordered_multiset/debug/invalid_local_iterator_copy_construction_neg.cc:
	New test case.
	* testsuite/23_containers/unordered_multiset/debug/invalid_local_iterator_move_assignment_neg.cc:
	New test case.
	* testsuite/23_containers/unordered_multiset/debug/invalid_local_iterator_move_construction_neg.cc:
	New test case.
	* testsuite/23_containers/unordered_set/debug/invalid_local_iterator_arrow_operator_neg.cc:
	New test case.
	* testsuite/23_containers/unordered_set/debug/invalid_local_iterator_const_conversion_neg.cc:
	New test case.
	* testsuite/23_containers/unordered_set/debug/invalid_local_iterator_copy_assignment_neg.cc:
	New test case.
	* testsuite/23_containers/unordered_set/debug/invalid_local_iterator_copy_construction_neg.cc:
	New test case.
	* testsuite/23_containers/unordered_set/debug/invalid_local_iterator_move_assignment_neg.cc:
	New test case.
	* testsuite/23_containers/unordered_set/debug/invalid_local_iterator_move_construction_neg.cc:
	New test case.

2025-04-18  Tomasz Kamiński  <tkaminsk@redhat.com>

	* doc/xml/manual/appendix_contributing.xml: Add 'and functions'.

2025-04-17  Jason Merrill  <jason@redhat.com>

	* testsuite/20_util/tuple/element_access/get_neg.cc: Adjust
	diagnostic.

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

	PR libstdc++/119840
	* include/std/format (_M_parse_fill_and_align): Cast elements of
	__not_fill to _CharT.

2025-04-17  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/format (format_kind): Do not use 'not'
	alternative token to make the primary template ill-formed. Use
	the undeclared identifier __primary_template_not_defined and a
	comment that will appear in diagnostics.
	* testsuite/std/format/ranges/format_kind_neg.cc: New test.

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

	PR libstdc++/109162
	* include/std/format (__format::__simply_formattable_range): Define.
	(range_formatter::format): Do not instantiate _M_format for mutable
	_Rg if const _Rg can be used.

2025-04-16  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/109162
	* include/std/format (range_formatter::format): Format const range,
	only if reference type is not changed.
	* testsuite/std/format/ranges/formatter.cc: New tests.

2025-04-16  Tomasz Kamiński  <tkaminsk@redhat.com>

	PR libstdc++/109162
	* include/std/format (__formatter_int::_M_format_character_escaped)
	(__formatter_str::format): Use __sink.out() to produce _Sink_iter.
	(__format::__const_formattable_range): Moved closer to range_formatter.
	(__format::__maybe_const_range): Use `__conditional_t` and moved closer
	to range_formatter.
	(__format::__format_padded, __format::maybe_const)
	(__format::__indexed_formatter_storage, __format::__tuple_formatter)
	(std::formatter<pair<_Fp, _Sp>, _CharT>>)
	(std::formatter<tuple<_Tps...>, _CharT): Define.
	(std::formatter<_Rg, _CharT>::format): Cast incoming range to
	__format::__maybe_const_range<_Rg, _CharT>&.
	(std::formatter<_Rg, _CharT>::_M_format): Extracted from format,
	and use __format_padded.
	(std::formatter<_Rg, _CharT>::_M_format_no_padding): Rename...
	(std::formatter<_Rg, _CharT>::_M_format_elems): ...to this.
	(std::formatter<_Rg, _CharT>::_M_format_with_padding): Extracted as
	__format_padded.
	* testsuite/util/testsuite_iterators.h (test_input_range_nocopy):
	Define.
	* testsuite/std/format/ranges/formatter.cc: Tests for `m` specifier.
	* testsuite/std/format/ranges/sequence.cc: Tests for array and subrange.
	* testsuite/std/format/ranges/map.cc: New test.
	* testsuite/std/format/tuple.cc: New test.

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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