2022-01-17  Jonathan Wakely  <jwakely@redhat.com>

	* doc/xml/manual/status_cxx2020.xml: Update.
	* doc/html/manual/status.html: Regenerate.

2022-01-17  Jonathan Wakely  <jwakely@redhat.com>
	    Thomas Rodgers  <trodgers@redhat.com>

	* include/bits/shared_ptr_atomic.h (__cpp_lib_atomic_shared_ptr):
	New macro.
	(_Sp_atomic): New class template.
	(atomic<shared_ptr<T>>, atomic<weak_ptr<T>>): New partial
	specializations.
	* include/bits/shared_ptr_base.h (__shared_count, __weak_count)
	(__shared_ptr, __weak_ptr): Declare _Sp_atomic as a friend.
	* include/std/version (__cpp_lib_atomic_shared_ptr): New macro.
	* testsuite/20_util/shared_ptr/atomic/atomic_shared_ptr.cc: New
	test.
	* testsuite/20_util/weak_ptr/atomic_weak_ptr.cc: New test.

2022-01-15  Matthias Kretz  <m.kretz@gsi.de>

	* include/experimental/bits/simd.h: Move feature detection bools
	and add __have_avx512bitalg, __have_avx512vbmi2,
	__have_avx512vbmi, __have_avx512ifma, __have_avx512cd,
	__have_avx512vnni, __have_avx512vpopcntdq.
	(__detail::__machine_flags): New function which returns a unique
	uint64 depending on relevant -m and -f flags.
	(__detail::__odr_helper): New type alias for either an anonymous
	type or a type specialized with the __machine_flags number.
	(_SimdIntOperators): Change template parameters from _Impl to
	_Tp, _Abi because _Impl now has an __odr_helper parameter which
	may be _OdrEnforcer from the anonymous namespace, which makes
	for a bad base class.
	(many): Either add __odr_helper template parameter or mark as
	always_inline.
	* include/experimental/bits/simd_detail.h: Add defines for
	AVX512BITALG, AVX512VBMI2, AVX512VBMI, AVX512IFMA, AVX512CD,
	AVX512VNNI, AVX512VPOPCNTDQ, and AVX512VP2INTERSECT.
	* include/experimental/bits/simd_builtin.h: Add __odr_helper
	template parameter or mark as always_inline.
	* include/experimental/bits/simd_fixed_size.h: Ditto.
	* include/experimental/bits/simd_math.h: Ditto.
	* include/experimental/bits/simd_scalar.h: Ditto.
	* include/experimental/bits/simd_neon.h: Add __odr_helper
	template parameter.
	* include/experimental/bits/simd_ppc.h: Ditto.
	* include/experimental/bits/simd_x86.h: Ditto.

2022-01-14  Uroš Bizjak  <ubizjak@gmail.com>

	* testsuite/22_locale/numpunct/members/char/3.cc:
	Require pt_PT locale instead of nl_NL.
	(test02): Use pt_PT locale instead of nl_NL.

2022-01-14  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/91260
	PR libstdc++/91383
	PR libstdc++/95065
	* include/backward/binders.h (bind1st, bind2nd): Add deprecated
	attribute.
	* include/bits/refwrap.h (_Maybe_unary_or_binary_function):
	Disable deprecated warnings for base classes.
	(_Reference_wrapper_base): Likewise.
	* include/bits/shared_ptr_base.h (_Sp_owner_less): Likewise.
	* include/bits/stl_bvector.h (_Bit_iterator_base): Likewise.
	* include/bits/stl_function.h (unary_function, binary_function):
	Add deprecated attribute.
	(unary_negate, not1, binary_negate, not2, ptr_fun)
	(pointer_to_unary_function, pointer_to_binary_function)
	(mem_fun_t, const_mem_fun_t, mem_fun_ref_t, const_mem_fun_ref_t)
	(mem_fun1_t, const_mem_fun1_t, mem_fun_ref1_t)
	(const_mem_fun1_ref_t, mem_fun, mem_fun_ref): Add deprecated
	attributes.
	* include/bits/stl_iterator.h: Disable deprecated warnings for
	std::iterator base classes.
	* include/bits/stl_iterator_base_types.h (iterator): Add
	deprecated attribute.
	* include/bits/stl_map.h (map::value_compare): Disable
	deprecated warnings for base class.
	* include/bits/stl_multimap.h (multimap::value_compare):
	Likewise.
	* include/bits/stl_raw_storage_iter.h (raw_storage_iterator):
	Add deprecated attribute.
	* include/bits/stl_tempbuf.h (get_temporary_buffer): Likewise.
	* include/bits/stream_iterator.h: Disable deprecated warnings.
	* include/bits/streambuf_iterator.h: Likewise.
	* include/ext/bitmap_allocator.h: Remove unary_function base
	classes.
	* include/ext/functional: Disable deprecated warnings.
	* include/ext/rope: Likewise.
	* include/ext/throw_allocator.h: Likewise.
	* include/std/type_traits (result_of): Add deprecated attribute.
	* include/tr1/functional: Disable deprecated warnings.
	* include/tr1/functional_hash.h: Likewise.
	* testsuite/20_util/function_objects/binders/1.cc: Add
	-Wno-disable-deprecations.
	* testsuite/20_util/function_objects/binders/3113.cc: Likewise.
	* testsuite/20_util/function_objects/constexpr.cc: Add
	dg-warning.
	* testsuite/20_util/raw_storage_iterator/base.cc: Likewise.
	* testsuite/20_util/raw_storage_iterator/dr2127.cc: Likewise.
	* testsuite/20_util/raw_storage_iterator/requirements/base_classes.cc:
	Likewise.
	* testsuite/20_util/raw_storage_iterator/requirements/explicit_instantiation/1.cc:
	Likewise.
	* testsuite/20_util/raw_storage_iterator/requirements/typedefs.cc:
	Likewise.
	* testsuite/20_util/reference_wrapper/24803.cc:
	Likewise.
	* testsuite/20_util/reference_wrapper/typedefs.cc: Enable for
	C++20 and check for absence of nested types.
	* testsuite/20_util/shared_ptr/comparison/less.cc: Remove
	std::binary_function base class.
	* testsuite/20_util/temporary_buffer.cc: Add dg-warning.
	* testsuite/21_strings/basic_string/cons/char/69092.cc: Remove
	std::iterator base class.
	* testsuite/24_iterators/back_insert_iterator/requirements/base_classes.cc:
	Likewise.
	* testsuite/24_iterators/front_insert_iterator/requirements/base_classes.cc:
	Likewise.
	* testsuite/24_iterators/insert_iterator/requirements/base_classes.cc:
	Likewise.
	* testsuite/24_iterators/istream_iterator/requirements/base_classes.cc:
	Likewise.
	* testsuite/24_iterators/istreambuf_iterator/92285.cc:
	Likewise.
	* testsuite/24_iterators/istreambuf_iterator/requirements/base_classes.cc:
	Likewise.
	* testsuite/24_iterators/ostream_iterator/requirements/base_classes.cc:
	Likewise.
	* testsuite/24_iterators/ostreambuf_iterator/requirements/base_classes.cc:
	Likewise.
	* testsuite/24_iterators/reverse_iterator/requirements/base_classes.cc:
	Likewise.
	* testsuite/25_algorithms/copy/34595.cc:
	Likewise.
	* testsuite/25_algorithms/minmax/3.cc: Remove std::binary_function
	base class.
	* testsuite/25_algorithms/all_of/requirements/explicit_instantiation/2.cc:
	Disable deprecated warnings.
	* testsuite/25_algorithms/all_of/requirements/explicit_instantiation/pod.cc:
	Likewise.
	* testsuite/25_algorithms/any_of/requirements/explicit_instantiation/2.cc:
	Likewise.
	* testsuite/25_algorithms/any_of/requirements/explicit_instantiation/pod.cc:
	Likewise.
	* testsuite/25_algorithms/copy_if/requirements/explicit_instantiation/2.cc:
	Likewise.
	* testsuite/25_algorithms/copy_if/requirements/explicit_instantiation/pod.cc:
	Likewise.
	* testsuite/25_algorithms/count_if/requirements/explicit_instantiation/2.cc:
	Likewise.
	* testsuite/25_algorithms/count_if/requirements/explicit_instantiation/pod.cc:
	Likewise.
	* testsuite/25_algorithms/find_end/requirements/explicit_instantiation/2.cc:
	Likewise.
	* testsuite/25_algorithms/find_end/requirements/explicit_instantiation/pod.cc:
	Likewise.
	* testsuite/25_algorithms/find_first_of/requirements/explicit_instantiation/2.cc:
	Likewise.
	* testsuite/25_algorithms/find_first_of/requirements/explicit_instantiation/pod.cc:
	Likewise.
	* testsuite/25_algorithms/find_if/requirements/explicit_instantiation/2.cc:
	Likewise.
	* testsuite/25_algorithms/find_if/requirements/explicit_instantiation/pod.cc:
	Likewise.
	* testsuite/25_algorithms/find_if_not/requirements/explicit_instantiation/2.cc:
	Likewise.
	* testsuite/25_algorithms/find_if_not/requirements/explicit_instantiation/pod.cc:
	Likewise.
	* testsuite/25_algorithms/for_each/requirements/explicit_instantiation/2.cc:
	Likewise.
	* testsuite/25_algorithms/for_each/requirements/explicit_instantiation/pod.cc:
	Likewise.
	* testsuite/25_algorithms/is_partitioned/requirements/explicit_instantiation/2.cc:
	Likewise.
	* testsuite/25_algorithms/is_partitioned/requirements/explicit_instantiation/pod.cc:
	Likewise.
	* testsuite/25_algorithms/is_permutation/requirements/explicit_instantiation/2.cc:
	Likewise.
	* testsuite/25_algorithms/is_permutation/requirements/explicit_instantiation/pod.cc:
	Likewise.
	* testsuite/25_algorithms/none_of/requirements/explicit_instantiation/2.cc:
	Likewise.
	* testsuite/25_algorithms/none_of/requirements/explicit_instantiation/pod.cc:
	Likewise.
	* testsuite/25_algorithms/partition/requirements/explicit_instantiation/2.cc:
	Likewise.
	* testsuite/25_algorithms/partition/requirements/explicit_instantiation/pod.cc:
	Likewise.
	* testsuite/25_algorithms/partition_copy/requirements/explicit_instantiation/2.cc:
	Likewise.
	* testsuite/25_algorithms/partition_copy/requirements/explicit_instantiation/pod.cc:
	Likewise.
	* testsuite/25_algorithms/partition_point/requirements/explicit_instantiation/2.cc:
	Likewise.
	* testsuite/25_algorithms/partition_point/requirements/explicit_instantiation/pod.cc:
	Likewise.
	* testsuite/25_algorithms/random_shuffle/requirements/explicit_instantiation/2.cc:
	Likewise.
	* testsuite/25_algorithms/random_shuffle/requirements/explicit_instantiation/pod.cc:
	Likewise.
	* testsuite/25_algorithms/remove_copy_if/requirements/explicit_instantiation/2.cc:
	Likewise.
	* testsuite/25_algorithms/remove_copy_if/requirements/explicit_instantiation/pod.cc:
	Likewise.
	* testsuite/25_algorithms/remove_if/requirements/explicit_instantiation/2.cc:
	Likewise.
	* testsuite/25_algorithms/remove_if/requirements/explicit_instantiation/pod.cc:
	Likewise.
	* testsuite/25_algorithms/replace_copy_if/requirements/explicit_instantiation/2.cc:
	Likewise.
	* testsuite/25_algorithms/replace_copy_if/requirements/explicit_instantiation/pod.cc:
	Likewise.
	* testsuite/25_algorithms/replace_if/requirements/explicit_instantiation/2.cc:
	Likewise.
	* testsuite/25_algorithms/replace_if/requirements/explicit_instantiation/pod.cc:
	Likewise.
	* testsuite/25_algorithms/search/requirements/explicit_instantiation/2.cc:
	Likewise.
	* testsuite/25_algorithms/search/requirements/explicit_instantiation/pod.cc:
	Likewise.
	* testsuite/25_algorithms/search_n/requirements/explicit_instantiation/2.cc:
	Likewise.
	* testsuite/25_algorithms/search_n/requirements/explicit_instantiation/pod.cc:
	Likewise.
	* testsuite/25_algorithms/stable_partition/requirements/explicit_instantiation/2.cc:
	Likewise.
	* testsuite/25_algorithms/stable_partition/requirements/explicit_instantiation/pod.cc:
	Likewise.
	* testsuite/25_algorithms/transform/requirements/explicit_instantiation/2.cc:
	Likewise.
	* testsuite/25_algorithms/transform/requirements/explicit_instantiation/pod.cc:
	Likewise.
	* testsuite/27_io/basic_filebuf/underflow/wchar_t/9178.cc: Add
	dg-warning.
	* testsuite/ext/pb_ds/example/priority_queue_erase_if.cc:
	Likewise.
	* testsuite/ext/pb_ds/example/priority_queue_split_join.cc:
	Likewise.
	* testsuite/tr1/3_function_objects/reference_wrapper/typedefs.cc:
	Disable deprecated warnings.
	* testsuite/tr1/6_containers/hash/requirements/base_classes.cc:
	Likewise.
	* testsuite/util/regression/trait/erase_if_fn.hpp: Remove
	std::unary_function base classes.
	* testsuite/util/testsuite_iterators.h (output_iterator_wrapper):
	Remove std::iterator base classes.

2022-01-14  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/shared_ptr.h (__cpp_lib_shared_ptr_weak_type):
	Correct type of macro value.
	(shared_ptr): Add additional friend declarations.
	(make_shared, allocate_shared): Constrain existing overloads and
	remove static_assert.
	* include/bits/shared_ptr_base.h (__cpp_lib_smart_ptr_for_overwrite):
	New macro.
	(_Sp_counted_ptr_inplace<T, Alloc, Lp>): New partial
	specialization for use with make_shared_for_overwrite.
	(__cpp_lib_shared_ptr_arrays): Update value for C++20.
	(_Sp_counted_array_base): New class template.
	(_Sp_counted_array): New class template.
	(__shared_count(_Tp*&, const _Sp_counted_array_base&, _Init)):
	New constructor for allocating shared arrays.
	(__shared_ptr(const _Sp_counted_array_base&, _Init)): Likewise.
	* include/std/version (__cpp_lib_shared_ptr_weak_type): Correct
	type.
	(__cpp_lib_shared_ptr_arrays): Update value for C++20.
	(__cpp_lib_smart_ptr_for_overwrite): New macro.
	* testsuite/20_util/shared_ptr/creation/99006.cc: Adjust
	expected errors.
	* testsuite/20_util/shared_ptr/creation/array.cc: New test.
	* testsuite/20_util/shared_ptr/creation/overwrite.cc: New test.
	* testsuite/20_util/shared_ptr/creation/version.cc: New test.
	* testsuite/20_util/unique_ptr/creation/for_overwrite.cc: Check
	feature test macro. Test non-trivial default-initialization.

2022-01-14  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/stl_construct.h (_Construct, _Construct_novalue):
	Also cast away cv-qualifiers when converting pointer to void.
	* testsuite/20_util/allocator/void.cc: Test construct function
	with cv-qualified types.

2022-01-14  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/103992
	* include/bits/stl_iterator.h (common_iterator): Use
	std::construct_at instead of placement new.
	* testsuite/24_iterators/common_iterator/1.cc: Check copy
	construction is usable in constant expressions.

2022-01-14  Jonathan Wakely  <jwakely@redhat.com>

	* doc/xml/manual/status_cxx2011.xml: Document new tokens
	accepted by std::random_device constructor.
	* doc/html/manual/status.html: Regenerate.

2022-01-12  Patrick Palka  <ppalka@redhat.com>

	* testsuite/20_util/to_chars/103955.cc: Add explicit dg-do
	directive.

2022-01-12  Patrick Palka  <ppalka@redhat.com>

	PR libstdc++/103955
	* src/c++17/floating_to_chars.cc (__floating_to_chars_hex):
	Track the excess precision separately from the effective
	precision.  Avoid overflow in bounds check by splitting it into
	two checks.
	(__floating_to_chars_precision): Avoid overflow in bounds checks
	similarly.
	* testsuite/20_util/to_chars/103955.cc: New test.

2022-01-11  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/103726
	* include/Makefile.am: Install <source_location> for
	freestanding.
	* include/Makefile.in: Regenerate.
	* include/std/version (__cpp_lib_source_location): Define for
	freestanding.

2022-01-11  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/ranges (ranges::lazy_split_view::_InnerIter::end()):
	Add neoxcept (LWG 3593).

2022-01-11  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/ranges (ranges::__detail::__box): Add constexpr to
	assignment operators (LWG 3572).
	* testsuite/std/ranges/adaptors/filter.cc: Check assignment of a
	view that uses copyable-box.

2022-01-11  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/103726
	* include/Makefile.am: Install <coroutine> for freestanding.
	* include/Makefile.in: Regenerate.
	* include/std/coroutine: Adjust headers and preprocessor
	conditions.
	(__coroutine_traits_impl): Use concepts when available.
	[_GLIBCXX_HOSTED] (hash<coroutine_handle>): Define.

2022-01-11  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/ostream (operator<<(basic_ostream&, charT)):
	Use unformatted input if no padding is needed.
	(operator<<(basic_ostream<char>&, char)): Likewise.

2022-01-11  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/103891
	* include/bits/c++config (_GLIBCXX_HAVE_COND_TRIVIAL_SPECIAL_MEMBERS):
	Define.
	* include/std/variant (__cpp_lib_variant): Only define C++20
	value when the compiler is known to support conditionally
	trivial destructors.
	* include/std/version (__cpp_lib_variant): Likewise.

2022-01-11  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/stl_iterator.h (common_iterator): Add constexpr
	to all member functions (LWG 3574).
	* testsuite/24_iterators/common_iterator/1.cc: Evaluate some
	tests as constant expressions.
	* testsuite/24_iterators/common_iterator/2.cc: Likewise.

2022-01-10  Jakub Jelinek  <jakub@redhat.com>

	PR libstdc++/77760
	* include/bits/locale_facets_nonio.h (__time_get_state): New struct.
	(time_get::_M_extract_via_format): Declare new method with
	__time_get_state& as an extra argument.
	* include/bits/locale_facets_nonio.tcc (_M_extract_via_format): Add
	__state argument, set various fields in it while parsing.  Handle %j,
	%U, %w and %W, fix up handling of %y, %Y and %C, don't adjust tm_hour
	for %p immediately.  Add a wrapper around the method without the
	__state argument for backwards compatibility.
	(_M_extract_num): Remove all __len == 4 special cases.
	(time_get::do_get_time, time_get::do_get_date, time_get::do_get): Zero
	initialize __state, pass it to _M_extract_via_format and finalize it
	at the end.
	(do_get_year): For 1-2 digit parsed years, map 0-68 to 2000-2068,
	69-99 to 1969-1999.  For 3-4 digit parsed years use that as year.
	(get): If do_get isn't overloaded from the locale_facets_nonio.tcc
	version, don't call do_get but call _M_extract_via_format instead to
	pass around state.
	* config/abi/pre/gnu.ver (GLIBCXX_3.4.30): Export _M_extract_via_format
	with extra __time_get_state and __time_get_state::_M_finalize_state.
	* src/c++98/locale_facets.cc (is_leap, day_of_the_week,
	day_of_the_year): New functions in anon namespace.
	(mon_yday): New var in anon namespace.
	(__time_get_state::_M_finalize_state): Define.
	* testsuite/22_locale/time_get/get/char/4.cc: New test.
	* testsuite/22_locale/time_get/get/wchar_t/4.cc: New test.
	* testsuite/22_locale/time_get/get_year/char/1.cc (test01): Parse 197
	as year 197AD instead of error.
	* testsuite/22_locale/time_get/get_year/char/5.cc (test01): Parse 1 as
	year 2001 instead of error.
	* testsuite/22_locale/time_get/get_year/char/6.cc: New test.
	* testsuite/22_locale/time_get/get_year/wchar_t/1.cc (test01): Parse
	197 as year 197AD instead of error.
	* testsuite/22_locale/time_get/get_year/wchar_t/5.cc (test01): Parse
	1 as year 2001 instead of error.
	* testsuite/22_locale/time_get/get_year/wchar_t/6.cc: New test.

2022-01-10  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/103866
	* acinclude.m4 (GLIBCXX_COMPUTE_STDIO_INTEGER_CONSTANTS): Do
	nothing for freestanding builds.
	(GLIBCXX_ENABLE_HOSTED): Define FREESTANDING_FLAGS.
	* configure.ac: Do not use AC_LIBTOOL_DLOPEN when configured
	with --without-headers.  Do not use GCC_HEADER_STDINT for
	freestanding builds.
	* libsupc++/Makefile.am (HOSTED_CXXFLAGS): Use -ffreestanding
	for freestanding builds.
	* configure: Regenerate.
	* Makefile.in: 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++98/Makefile.in: Regenerate.
	* src/filesystem/Makefile.in: Regenerate.
	* testsuite/Makefile.in: Regenerate.

2022-01-10  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/28_regex/algorithms/regex_replace/char/103664.cc:
	Add dg-timeout-factor directive.
	* testsuite/28_regex/basic_regex/84110.cc: Likewise.
	* testsuite/28_regex/basic_regex/ctors/char/other.cc: Likewise.
	* testsuite/28_regex/match_results/102667.cc: Likewise.

2022-01-10  Jonathan Wakely  <jwakely@redhat.com>

	* doc/xml/manual/using.xml: Update documentation around default
	-std option.
	* doc/html/*: Regenerate.

2022-01-10  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/100017
	* src/c++17/Makefile.am (AM_CXXFLAGS): Add -nostdinc++.
	* src/c++17/Makefile.in: Regenerate.

2022-01-09  Sandra Loosemore  <sandra@codesourcery.com>

	* testsuite/18_support/type_info/constexpr.cc: Add explicit
	-fdelete-null-pointer-checks option.

2022-01-06  Pavel I. Kryukov  <pavel.kryukov@phystech.edu>
	    Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/103853
	* include/bits/forward_list.tcc (forward_list::merge): Check for
	self-merge.
	* testsuite/23_containers/forward_list/operations/merge.cc: New test.

2022-01-06  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/regex.h (basic_regex, match_results): Qualify
	name in friend declaration, to work around Clang bug.

2022-01-06  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/ext/rope/pthread7-rope.cc: Add dg-timeout-factor.

2022-01-06  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/103911
	* include/std/charconv (__from_chars_alpha_to_num): Return
	char instead of unsigned char. Change invalid return value to
	127 instead of using numeric trait.
	(__from_chars_alnum): Fix comment. Do not use std::isdigit.
	Change type of variable to char.

2022-01-05  François Dumont  <fdumont@gcc.gnu.org>

	PR libstdc++/68303
	* include/bits/hashtable_policy.h
	(_Hashtable_hash_traits<_Hash>): New.
	(_Hash_code_base<>::_M_hash_code(const _Hash_node_value<>&)): New.
	(_Hashtable_base<>::_M_key_equals): New.
	(_Hashtable_base<>::_M_equals): Use latter.
	(_Hashtable_base<>::_M_key_equals_tr): New.
	(_Hashtable_base<>::_M_equals_tr): Use latter.
	* include/bits/hashtable.h
	(_Hashtable<>::__small_size_threshold()): New, use _Hashtable_hash_traits.
	(_Hashtable<>::find): Loop through elements to look for key if size is lower
	than __small_size_threshold().
	(_Hashtable<>::_M_emplace(true_type, _Args&&...)): Likewise.
	(_Hashtable<>::_M_insert_unique(_Kt&&, _Args&&, const _NodeGenerator&)): Likewise.
	(_Hashtable<>::_M_compute_hash_code(const_iterator, const key_type&)): New.
	(_Hashtable<>::_M_emplace(const_iterator, false_type, _Args&&...)): Use latter.
	(_Hashtable<>::_M_find_before_node(const key_type&)): New.
	(_Hashtable<>::_M_erase(true_type, const key_type&)): Use latter.
	(_Hashtable<>::_M_erase(false_type, const key_type&)): Likewise.
	* src/c++11/hashtable_c++0x.cc: Include <bits/functional_hash.h>.
	* testsuite/util/testsuite_performance.h
	(report_performance): Use 9 width to display memory.
	* testsuite/performance/23_containers/insert_erase/unordered_small_size.cc:
	New performance test case.

2022-01-05  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/103919
	* include/bits/basic_string.h (basic_string(const T&, size_t, size_t)):
	Relax constraints on string_view parameter.
	* include/bits/cow_string.h (basic_string(const T&, size_t, size_t)):
	Likewise.
	* testsuite/21_strings/basic_string/cons/char/103919.cc: New test.

2022-01-05  Jonathan Wakely  <jwakely@redhat.com>

	* config/abi/pre/gnu.ver (GLIBCXX_3.4.30): Export new symbol for
	ARM EABI.
	* include/bits/c++config (_GLIBCXX23_CONSTEXPR): Define.
	* include/std/version (__cpp_lib_constexpr_typeinfo): Define.
	* libsupc++/tinfo.cc: Add #error to ensure non-inline definition
	is emitted.
	(type_info::__equal): Define alias symbol.
	* libsupc++/typeinfo (type_info::before): Combine different
	implementations into one.
	(type_info::operator==): Likewise. Use address equality for
	constant evaluation. Call __equal for targets that require the
	definition to be non-inline.
	* testsuite/18_support/type_info/constexpr.cc: New test.

2022-01-05  Jonathan Wakely  <jwakely@redhat.com>

	* src/c++11/cxx11-ios_failure.cc (io_error_category): Define
	class and virtual functions as 'final'.
	(io_category_instance): Use constinit union to make the object
	immortal.
	* src/c++11/future.cc (future_error_category): Define class and
	virtual functions as 'final'.
	(future_category_instance): Use constinit union.

2022-01-05  Jonathan Wakely  <jwakely@redhat.com>

	* python/libstdcxx/v6/printers.py (StdErrorCodePrinter): Strip
	versioned namespace from the type name that is printed.

2022-01-05  Jonathan Wakely  <jwakely@redhat.com>

	* python/libstdcxx/v6/printers.py (StdRegexStatePrinter): New
	printer for std::regex NFA states.

2022-01-05  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/23_containers/forward_list/operations/1.cc: Fill in
	placeholders in comments.
	* testsuite/23_containers/forward_list/operations/2.cc:
	Likewise.
	* testsuite/23_containers/forward_list/operations/3.cc:
	Likewise.
	* testsuite/23_containers/forward_list/operations/4.cc:
	Likewise.
	* testsuite/23_containers/forward_list/operations/5.cc:
	Likewise.
	* testsuite/23_containers/forward_list/operations/6.cc:
	Likewise.
	* testsuite/23_containers/forward_list/operations/7.cc:
	Likewise.

2022-01-05  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/103848
	* include/bits/stl_deque.h (operator-): Do not use 0 as null
	pointer constant.

2022-01-05  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/alloc_traits.h (allocator_traits<allocator<void>>):
	Use std::_Construct for construct.

2022-01-05  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/103877
	* doc/xml/faq.xml: Add '-x c++' to preprocessor command.
	* doc/html/faq.html: Regenerate.

2022-01-05  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/regex.h (__regex_algo_impl): Change __policy and
	__match_mode template parameters to be function parameters.
	(regex_match, regex_search): Pass policy and match mode as
	function arguments.
	* include/bits/regex.tcc (__regex_algo_impl): Change template
	parameters to function parameters.
	* include/bits/regex_compiler.h (_RegexTranslatorBase): Use
	'if constexpr' for conditions using template parameters.
	(_RegexTranslator): Likewise.
	* include/bits/regex_executor.tcc (_Executor::_M_handle_accept):
	Likewise.
	* testsuite/util/testsuite_regex.h (regex_match_debug)
	(regex_search_debug): Move template arguments to function
	arguments.

2022-01-05  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/util/testsuite_regex.h (regex_match_debug): Compare
	results even if the match failed.

2022-01-05  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/regex_compiler.tcc: Adjust all calls to
	__throw_regex_error.
	* include/bits/regex_error.h (__throw_regex_error): Add noreturn
	attribute.
	* include/bits/regex_scanner.tcc: Likewise.
	* src/c++11/regex.cc (desc): New helper function.
	(regex_error::regex_error(error_type)): Use desc to get a string
	corresponding to the error code.


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