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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