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GCC Administrator 569ace1fa5 Daily bump.
2026-03-22 00:16:21 +00:00

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2026-03-21 Matthias Kretz <m.kretz@gsi.de>
* include/Makefile.am: Add simd headers.
* include/Makefile.in: Regenerate.
* include/bits/version.def (simd): New.
* include/bits/version.h: Regenerate.
* include/bits/simd_alg.h: New file.
* include/bits/simd_details.h: New file.
* include/bits/simd_flags.h: New file.
* include/bits/simd_iterator.h: New file.
* include/bits/simd_loadstore.h: New file.
* include/bits/simd_mask.h: New file.
* include/bits/simd_mask_reductions.h: New file.
* include/bits/simd_reductions.h: New file.
* include/bits/simd_vec.h: New file.
* include/bits/simd_x86.h: New file.
* include/bits/vec_ops.h: New file.
* include/std/simd: New file.
* testsuite/std/simd/arithmetic.cc: New test.
* testsuite/std/simd/arithmetic_expensive.cc: New test.
* testsuite/std/simd/create_tests.h: New file.
* testsuite/std/simd/creation.cc: New test.
* testsuite/std/simd/creation_expensive.cc: New test.
* testsuite/std/simd/loads.cc: New test.
* testsuite/std/simd/loads_expensive.cc: New test.
* testsuite/std/simd/mask2.cc: New test.
* testsuite/std/simd/mask2_expensive.cc: New test.
* testsuite/std/simd/mask.cc: New test.
* testsuite/std/simd/mask_expensive.cc: New test.
* testsuite/std/simd/reductions.cc: New test.
* testsuite/std/simd/reductions_expensive.cc: New test.
* testsuite/std/simd/shift_left.cc: New test.
* testsuite/std/simd/shift_left_expensive.cc: New test.
* testsuite/std/simd/shift_right.cc: New test.
* testsuite/std/simd/shift_right_expensive.cc: New test.
* testsuite/std/simd/simd_alg.cc: New test.
* testsuite/std/simd/simd_alg_expensive.cc: New test.
* testsuite/std/simd/sse_intrin.cc: New test.
* testsuite/std/simd/stores.cc: New test.
* testsuite/std/simd/stores_expensive.cc: New test.
* testsuite/std/simd/test_setup.h: New file.
* testsuite/std/simd/traits_common.cc: New test.
* testsuite/std/simd/traits_impl.cc: New test.
* testsuite/std/simd/traits_math.cc: New test.
2026-03-20 Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/122567
* src/c++20/tzdb.cc (tzdb::current_zone): Loop over all trailing
components of /etc/localtime path. Use readlink instead of
std::filesystem::read_symlink.
2026-03-20 Jonathan Wakely <jwakely@redhat.com>
* src/c++20/tzdb.cc [_AIX]: Change #ifndef to #ifdef.
2026-03-20 Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/124568
* testsuite/24_iterators/istreambuf_iterator/105580.cc: Add
no_pch option.
2026-03-20 Jonathan Wakely <jwakely@redhat.com>
* src/c++17/fs_path.cc (path::operator+=): Use pointer
comparison to detect aliasing instead of a loop.
2026-03-20 Jonathan Wakely <jwakely@redhat.com>
* include/std/generator (_Stateless_alloc): Swap order of
constraints.
2026-03-19 François Dumont <frs.dumont@gmail.com>
* src/c++11/debug.cc (_Safe_sequence_base::_M_detach_single): Do not
check if input iterator is equal to _M_iterators if already equals to
_M_const_iterators.
(_Safe_unordered_container_base::_M_detach_local_single): Do not check
if input local iterator is equal to _M_local_iterators if already equals
to _M_const_local_iterators.
2026-03-19 Jakub Jelinek <jakub@redhat.com>
PR libstdc++/121790
* src/c++23/std.cc.in: Add enable_nonlocking_formatter_optimization.
2026-03-19 Jakub Jelinek <jakub@redhat.com>
PR libstdc++/118030
* src/c++23/std.cc.in: Add allocation_result.
2026-03-19 Jakub Jelinek <jakub@redhat.com>
PR c++/120775
* src/c++23/std.cc.in: Add is_reflection{,_v} and
is_consteval_only{,_v}.
2026-03-19 Jakub Jelinek <jakub@redhat.com>
PR libstdc++/119794
* src/c++23/std.cc.in: Add philox_engine and philox4x{32,64}.
2026-03-19 Jakub Jelinek <jakub@redhat.com>
* src/c++23/std.cc.in: Export views::indices.
2026-03-19 Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/124513
* src/c++20/tzdb.cc (operator>>(istream&, at_time::Indicator&)):
Do not peek at the next character if eofbit is already set.
(istream& operator>>(istream&, at_time&)): Skip whitespace
before the first character. Handle EOF when parsing "-" as time.
Do not peek for ":" or "." if eofbit already set.
* testsuite/std/time/time_zone/116110.cc (test_apia): Remove
offset of 24h now that the UNTIL time is parsed correctly.
* testsuite/std/time/time_zone/124513.cc: New test.
2026-03-19 Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/116110
* src/c++20/tzdb.cc (operator>>(istream&, ZoneInfo&)): Adjust
inf.m_until according to indicator suffix on AT time in UNTIL.
* testsuite/std/time/time_zone/116110.cc (test_kiritimati):
Remove FIXME now that the UNTIL time is adjusted for STDOFF.
(test_apia): Adjust FIXME now that UNTIL time is adusted for
STDOFF.
* testsuite/std/time/time_zone/get_info_sys.cc: Adjust expected
results to account for corrected logic.
* testsuite/std/time/zoned_time/1.cc: Likewise.
2026-03-19 Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/116110
* src/c++20/tzdb.cc (time_zone::_M_get_sys_info): Update
info.offset and info.save to values from the active rule.
* testsuite/std/time/time_zone/116110.cc: New test.
2026-03-18 Jonathan Wakely <jwakely@redhat.com>
* testsuite/17_intro/names.cc (ext, max_iter, ret, subs, Rg, Rs):
Define macros.
[__cplusplus < 201103] (mutex): Define macro.
2026-03-18 Jonathan Wakely <jwakely@redhat.com>
* include/experimental/bits/fs_path.h (path::stem)
(path::extension, path::has_stem, path::has_extension): Uglify
ext variable name.
2026-03-18 Jakub Jelinek <jakub@redhat.com>
* include/bits/regex_compiler.h (_Compiler::_M_pop): Uglify ret
variable name.
2026-03-18 Tomasz Kamiński <tkaminsk@redhat.com>
* include/std/mdspan (__mdspan::__index_type_cast): Handle
forwarding referene and use forward for class types.
* testsuite/23_containers/mdspan/int_like.h (ConstLValueInt)
(CustomIndexKind::ConstLValue): Define.
(CustomIndexType): Handle CustomIndexKind::ConstLValue.
* testsuite/23_containers/mdspan/at.cc: Test with ConstLValueInt.
* testsuite/23_containers/mdspan/extents/custom_integer.cc: Likewise.
* testsuite/23_containers/mdspan/mdspan.cc: Likewise.
2026-03-17 Jonathan Wakely <jwakely@redhat.com>
* include/bits/chrono_io.h (__formatter_duration::_S_subseconds):
Uglify subs variable name.
* include/bits/fs_path.h (path::stem, path::extension)
(path::has_stem, path::has_extension): Uglify ext parameter
name.
* include/ext/concurrence.h (__cond::wait, __cond::wait_recursive):
Uglify mutex parameter names.
* include/pstl/glue_algorithm_defs.h (generate_n): Uglify count
parameter name.
* include/std/ranges (zip_transform_view): Uglify Rs template
parameter name.
(__cartesian_is_sized_sentinel): Uglify FirstSent template
parameter name.
* include/tr1/riemann_zeta.tcc: Uglify max_size variable name.
2026-03-17 Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/124463
* include/bits/deque.tcc (__uninitialized_copy_a): Define
overloads for input and output iterators being std::deque
iterators, and for only the output iterator being a std::deque
iterator.
(__uninitialized_move_a): Overload for input and output
iterators being std::deque iterators.
* include/bits/stl_uninitialized.h (__uninitialized_copy_a)
(__uninitialized_move_a): Declare overloads for std::deque
iterators.
2026-03-17 Jonathan Wakely <jwakely@redhat.com>
Revert:
2026-03-16 Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/124268
* config/abi/pre/gnu.ver: Export symbols.
* src/Makefile.am: Add libmodulesconvenience.la to libstdc++
link.
* src/Makefile.in: Regenerate.
* src/c++23/Makefile.am: Create libmodulesconvenience.la
and populate it with std.o and std.compat.o interface units.
Add clean-local target.
* src/c++23/Makefile.in: Regenerate.
2026-03-17 Tomasz Kamiński <tkaminsk@redhat.com>
* testsuite/23_containers/mdspan/extents/ctor_ints.cc: Updated
is_explicit, and added more test cases.
2026-03-16 Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/124268
* config/abi/pre/gnu.ver: Export symbols.
* src/Makefile.am: Add libmodulesconvenience.la to libstdc++
link.
* src/Makefile.in: Regenerate.
* src/c++23/Makefile.am: Create libmodulesconvenience.la
and populate it with std.o and std.compat.o interface units.
Add clean-local target.
* src/c++23/Makefile.in: Regenerate.
2026-03-16 Jonathan Wakely <jwakely@redhat.com>
* include/bits/ranges_base.h (distance(It&&, Sent)): Only decay
arrays to pointers when the type is actually an array, as per
LWG 4242.
* testsuite/24_iterators/range_operations/distance.cc: Add test
for LWG 4242.
2026-03-16 Jonathan Wakely <jwakely@redhat.com>
* testsuite/29_atomics/atomic/compare_exchange_padding.cc:
Rewrite to be robust against spurious failures of weak compare
exchange, and to check padding bits more directly.
2026-03-16 Jonathan Wakely <jwakely@redhat.com>
* include/bits/allocator.h (allocator::allocate): Use specific
feature test macro for constexpr allocate and deallocate. Make
consteval path a discarded statement if sizeof(T) is ill-formed.
* include/bits/new_allocator.h (__new_allocator::allocate): Use
requires-expression for static_cast. Make function body a
discarded stament if sizeof(T) is ill-formed. Use if-constexpr
for alignment checks.
2026-03-15 François Dumont <frs.dumont@gmail.com>
PR libstdc++/124444
* include/debug/safe_sequence.h (_Safe_sequence::_M_invalidate_if_impl): New.
(_Safe_sequence::_M_invalidate_if): Call later if not __is_constant_evaluated.
* include/debug/safe_sequence.tcc: Rename _M_invalidate_if into
_M_invalidate_if_impl and remove C++20 constexpr.
2026-03-14 Jonathan Wakely <jwakely@redhat.com>
* include/std/text_encoding: Fix @since in Doxygen comment.
2026-03-12 Rainer Orth <ro@CeBiTec.Uni-Bielefeld.DE>
PR libstdc++/124290
* testsuite/23_containers/mdspan/submdspan/selections/left_padded.cc:
Use dg-timeout-factor 4.
* testsuite/23_containers/mdspan/submdspan/selections/left.cc:
* testsuite/23_containers/mdspan/submdspan/selections/right_padded.cc:
* testsuite/23_containers/mdspan/submdspan/selections/right.cc:
Likewise.
* testsuite/23_containers/mdspan/submdspan/selections/stride.cc:
Likewise.
2026-03-12 Jonathan Wakely <jwakely@redhat.com>
* include/std/format (__format::_Ptr_sink::_M_finish): Rename
__max variable to __m.
* testsuite/17_intro/names.cc (__max): Define function-like
macro.
2026-03-12 Jakub Jelinek <jakub@redhat.com>
PR libstdc++/124443
* include/std/meta (std::define_static_object): Use CTAD for span.
2026-03-11 Jakub Jelinek <jakub@redhat.com>
* include/std/meta (std::meta::exception::what()): Use
__builtin_constexpr_diag instead of __asm__("") if supported.
(std::meta::access_context::via(info)): Don't call is_class_type
if __cls is not a type. Use __builtin_constexpr_diag instead of
__asm__("") if supported for -fno-exceptions.
2026-03-10 Jonathan Wakely <jwakely@redhat.com>
* include/std/chrono (hh_mm_ss): Add comment about LWG 4274.
2026-03-10 Jonathan Wakely <jwakely@redhat.com>
* include/bits/ranges_algo.h (__replace_fn, __replace_if_fn):
Change default template argument for type of new value, as per
LWG 4444.
* testsuite/25_algorithms/replace/lwg4444.cc: New test.
* testsuite/25_algorithms/replace_if/lwg4444.cc: New test.
2026-03-10 Jonathan Wakely <jwakely@redhat.com>
* include/std/span (as_bytes, as_writable_bytes): Add
constraints to disallow volatile elements, as per LWG 4243.
* testsuite/23_containers/span/lwg4243.cc: New test.
2026-03-10 Nathan Myers <ncm@cantrip.org>
PR libstdc++/118030
* include/bits/alloc_traits.h (allocate_at_least (2x)): Define.
* include/bits/allocator.h (allocate_at_least): Define.
* include/std/memory (__glibcxx_want_allocate_at_least): Define.
* include/bits/memoryfwd.h (allocation_result): Define, #include
<bits/version.h> first so that will work.
* include/bits/version.def (allocate_at_least): Add.
* include/bits/version.h: Regenerate.
* testsuite/20_util/allocator/allocate_at_least.cc: New test.
* testsuite/20_util/allocator/allocate_at_least_neg.cc: New test.
2026-03-10 Jonathan Wakely <jwakely@redhat.com>
* include/bits/basic_string.h: Check __glibcxx_to_string instead
of __cplusplus.
2026-03-10 Tomasz Kamiński <tkaminsk@redhat.com>
* include/std/format (__format::_Ptr_sink, __format::__format_padded)
(std::enable_nonlocking_formatter_optimization<pair<_Fp, _Sp>>):
Replaced 8 spaces with tabs.
2026-03-10 Tomasz Kamiński <tkaminsk@redhat.com>
* include/std/format (__format::_Ptr_sink): Reworked
from _Iter_sink specialization below.
(__format::_Iter_sink<_CharT, contiguous_iterator _OutIter>):
Renamed and reworked to _Ptr_sink.
(__format::__contiguous_char_iter, __format::__do_vformat_to_n):
Define.
(__format::__do_vformat_to): Use _Ptr_sink when appropriate,
and delegate to _Sink_iter specialization.
(std::format_to_n): Delegate to __do_vformat_to_n.
(__format::_Counting_sink): Use _Ptr_sink as base class.
2026-03-10 Tomasz Kamiński <tkaminsk@redhat.com>
* include/std/format (__formatter_int::format): Handle transcoding
to _CharT before calling _M_format_int.
(__formatter_int::_M_format_int): Accept basic_string_view<_CharT>
and remove transcoding.
(__formatter_ptr::__formatter_ptr): Configure _M_spec member.
(__formatter_ptr::parse): Negate _M_alt for __spec and not _M_spec.
(__formatter_ptr::format): Delegate to __formatter_int.
2026-03-10 François Dumont <frs.dumont@gmail.com>
* include/debug/string
[__cplusplus >= 201103L](basic_string(_Ite, _Ite, const _Alloc&)): Add
std::_RequireInputIter<_Ite> template parameter.
2026-03-09 Jonathan Wakely <jwakely@redhat.com>
* include/std/meta (exception::what, access_context::via): Use
__asm__ instead of asm keyword.
2026-03-09 Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/120527
* include/bits/atomic_wait.h [__FreeBSD__] (__platform_wait_t):
Define typedef.
[__FreeBSD__] (__platform_wait_uses_type): Define variable
template.
* src/c++20/atomic.cc (__platform_load): New function.
[__FreeBSD__] (_GLIBCXX_HAVE_PLATFORM_WAIT, __platform_wait)
(__platform_notify, __platform_wait_until): Define.
(__detail::__spin_impl): Use __platform_load.
2026-03-07 François Dumont <frs.dumont@gmail.com>
* include/debug/functions.h [__cplusplus >= 201103L]
(__foreign_iterator_aux): Remove.
(__foreign_iterator): Adapt to use __foreign_iterator_aux2.
* include/debug/helper_functions.h [__cplusplus >= 201103L]:
Remove include bits/cpp_type_traits.h.
(_Distance_traits<_Integral, std::__true_type>): Remove.
(__valid_range_aux(_Integral, _Integral, std::__true_type)):
Remove.
(__valid_range_aux(_Iterator, _Iterator, std::__false_type)): Remove.
(__valid_range_aux(_Integral, _Integral, _Distance_traits<_Integral>::__type&,
std::__true_type)): Remove.
(__valid_range_aux(_Iterator, _Iterator, _Distance_traits<_Iterator>::__type&,
std::__false_type)): Remove.
(__valid_range(_Iterator, _Iterator)): Adapt.
(__valid_range(_Iterator, _Iterator, _Distance_traits<_Iterator>::__type&)): Adapt.
2026-03-06 Nathan Myers <ncm@cantrip.org>
* include/std/bitset (operator[]() const): Customize bounds
check for C++11 case.
* testsuite/20_util/bitset/access/subscript_const_neg.cc:
Suppress UNRESOLVED complaint.
2026-03-06 Tomasz Kamiński <tkaminsk@redhat.com>
* include/bits/fs_path.h (std::formatter<filesystem::path, _CharT>):
Format _Utf_view directly via __formatter_str::_M_format_range.
2026-03-06 Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/122300
* src/c++17/fs_path.cc (path::_List::_Impl): Remove
static_asserts.
(path::_List::_Impl::required_alignment)
(path::_List::_Impl::use_aligned_new): New static data members.
(path::_List::_Impl::create_unchecked): Check use_aligned_new
and use aligned new if needed.
(path::_List::_Impl::alloc_size): New static member function.
(path::_List::_Impl_deleter::operator): Check use_aligned_new
and use aligned delete if needed.
2026-03-05 Nathan Myers <ncm@cantrip.org>
PR libstdc++/118341
* include/std/bitset (operator[] (2x)): Add assertion.
* testsuite/20_util/bitset/access/118341_neg1.cc: New test.
* testsuite/20_util/bitset/access/118341_neg2.cc: Same.
* testsuite/20_util/bitset/access/118341_smoke.cc: Same.
* testsuite/20_util/bitset/access/subscript.cc: Same.
* testsuite/20_util/bitset/access/subscript_const_neg.cc: Same.
2026-03-05 François Dumont <frs.dumont@gmail.com>
* include/debug/safe_unordered_container.h
(_Safe_unordered_container::_UContInvalidatePred): Move outside class, at
namespace scope. Declare friend.
(_Safe_unordered_container::_UMContInvalidatePred): Likewise.
(_Safe_unordered_container::_UContMergeGuard): Likewise.
(_Safe_unordered_container::_M_invalidate_all): Make protected.
(_Safe_unordered_container::_M_invalidate_all_if): Likewise.
2026-03-05 Tomasz Kamiński <tkaminsk@redhat.com>
PR libstdc++/124124
* testsuite/29_atomics/atomic/cons/zero_padding.cc: Limit size of
test types to four bytes.
2026-03-05 Tomasz Kamiński <tkaminsk@redhat.com>
Ivan Lazaric <ivan.lazaric1@gmail.com>
* include/std/format (_Arg_value::_M_get): Rename to...
(_Arg_value::_M_access): Modified to accept optional
second parameter that is assigned to value.
(_Arg_value::_M_get): Handle rename.
(_Arg_value::_M_set): Use construct_at for basic_string_view,
handle, and two-argument _S_access for other types.
2026-03-05 Tomasz Kamiński <tkaminsk@redhat.com>
* include/std/format (__Arg_value::handle): Define, extracted
with modification from basic_format_arg::handle.
(_Arg_value::_Handle_base): Remove.
(_Arg_value::_M_handle): Change type to handle.
(_Arg_value::_M_get, _Arg_value::_M_set): Check for handle
type directly, and return result unmodified.
(basic_format_arg::__formattable): Remove.
(basic_format_arg::handle): Replace with alias to
_Arg_value::handle.
2026-03-04 Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/124363
* include/std/string_view: Adjust comment on #endif to match #if
condition.
2026-03-04 Nathan Myers <ncm@cantrip.org>
PR libstdc++/117402
* include/debug/map.h (try_emplace (2x), insert_or_assign (2x)):
Define heterogeneous overloads, simplify existing overloads.
* include/debug/unordered_map: Same.
* include/debug/set.h (insert (2x)):
Define heterogeneous overloads.
* include/debug/unordered_set: Same.
2026-03-04 Nathan Myers <ncm@cantrip.org>
PR libstdc++/117402
* include/bits/stl_map.h (operator[], at (2x), try_emplace (2x),
insert_or_assign (2x)): Add overloads.
* include/bits/unordered_map.h (operator[], at (2x),
try_emplace (2x), insert_or_assign (2x), bucket (2x)): Add overloads.
* include/bits/stl_set.h (insert (2x)): Add overloads.
* include/bits/unordered_set.h (insert (2x), bucket (2x)): Add overloads.
* include/bits/hashtable.h (_M_bucket_tr, _M_insert_tr): Define.
* include/bits/hashtable_policy.h (_M_at_tr (2x)): Define.
* include/bits/stl_tree.h (_M_emplace_here, _M_get_insert_unique_pos_tr,
_M_get_insert_hint_unique_pos_tr): Define new heterogeneous insertion
code path for set and map.
* include/bits/version.def (associative_heterogeneous_insertion):
Define.
* include/bits/version.h: Regenerate.
* include/std/map (__glibcxx_want_associative_heterogeneous_insertion):
Define macro.
* include/std/set: Same.
* include/std/unordered_map: Same.
* include/std/unordered_set: Same.
* testsuite/23_containers/map/modifiers/hetero/insert.cc: New tests.
* testsuite/23_containers/set/modifiers/hetero/insert.cc: Same.
* testsuite/23_containers/unordered_map/modifiers/hetero/insert.cc:
Same.
* testsuite/23_containers/unordered_multimap/modifiers/hetero/insert.cc:
Same.
* testsuite/23_containers/unordered_multiset/modifiers/hetero/insert.cc:
Same.
* testsuite/23_containers/unordered_set/modifiers/hetero/insert.cc:
Same.
2026-03-03 Adam Wood <adam.wood@mines.sdsmt.edu>
PR libstdc++/122217
* testsuite/27_io/filesystem/operations/copy_symlink/1.cc: New
test.
* testsuite/27_io/filesystem/operations/copy_symlink/2.cc: New
test.
* testsuite/27_io/filesystem/operations/copy_symlink/3.cc: New
test.
* testsuite/27_io/filesystem/operations/copy_symlink/4.cc: New
test.
2026-03-03 Arthur O'Dwyer <arthur.j.odwyer@gmail.com>
PR libstdc++/119197
* include/std/expected (expected, expected<void, E>): Add
[[nodiscard]] to class.
* testsuite/20_util/expected/119197.cc: New test.
2026-03-03 Jonathan Wakely <jwakely@redhat.com>
* include/std/atomic (atomic<T*>::wait, atomic<T*>::notify_one)
(atomic<T*>::notify_all): Fix indentation.
2026-03-03 Jonathan Wakely <jwakely@redhat.com>
* include/bits/regex_compiler.h: Adjust comments so that
standard references are specific to C++11.
2026-03-02 François Dumont <frs.dumont@gmail.com>
* include/debug/safe_unordered_container.h
(_Safe_unordered_container::_M_invalidate_locals): Remove.
(_Safe_unordered_container::_M_invalidate_all): Lock mutex while calling
_M_invalidate_if and _M_invalidate_locals.
(_Safe_unordered_container::_M_invalidate_all_if): New.
(_Safe_unordered_container::_M_invalidate): New.
(_Safe_unordered_container::_M_invalidate_if): Make private, add __scoped_lock
argument.
(_Safe_unordered_container::_M_invalidate_local_if): Likewise.
* include/debug/safe_unordered_container.tcc
(_Safe_unordered_container::_M_invalidate_if): Adapt and remove lock.
(_Safe_unordered_container::_M_invalidate_local_if): Likewise.
* include/debug/unordered_map
(unordered_map::erase(const_iterator, const_iterator)): Lock before loop on
iterators. Remove _M_check_rehashed call.
(unordered_map::_M_self): New.
(unordered_map::_M_invalidate): Remove.
(unordered_map::_M_erase): Adapt and remove _M_check_rehashed call.
(unordered_multimap::_M_erase(_Base_iterator, _Base_iterator)): New.
(unordered_multimap::erase(_Kt&&)): Use latter.
(unordered_multimap::erase(const key_type&)): Likewise.
(unordered_multimap::erase(const_iterator, const_iterator)):
Lock before loop on iterators. Remove _M_check_rehashed.
(unordered_multimap::_M_self): New.
(unordered_multimap::_M_invalidate): Remove.
(unordered_multimap::_M_erase): Adapt. Remove _M_check_rehashed call.
* include/debug/unordered_set
(unordered_set::erase(const_iterator, const_iterator)): Add lock before loop
for iterator invalidation. Remove _M_check_rehashed call.
(unordered_set::_M_self): New.
(unordered_set::_M_invalidate): Remove.
(unordered_set::_M_erase): Adapt and remove _M_check_rehashed call.
(unordered_multiset::_M_erase(_Base_iterator, _Base_iterator)): New.
(unordered_multiset::erase(_Kt&&)): Use latter.
(unordered_multiset::erase(const key_type&)): Likewise.
(unordered_multiset::erase(const_iterator, const_iterator)):
Lock before loop on iterators. Remove _M_check_rehashed.
(unordered_multiset::_M_self): New.
(unordered_multiset::_M_invalidate): Remove.
(unordered_multiset::_M_erase): Adapt. Remove _M_check_rehashed call.
2026-03-02 Tomasz Kamiński <tkaminsk@redhat.com>
PR libstdc++/105580
* testsuite/24_iterators/istreambuf_iterator/105580.cc:
Add dg-bogus check for warning.
2026-03-02 Tomasz Kamiński <tkaminsk@redhat.com>
PR libstdc++/105580
* include/std/streambuf (streambuf::gptr, streambuf::egptr)
(streambuf::gbump): Surround with pragma disabling -Wnull-dereference.
* testsuite/24_iterators/istreambuf_iterator/105580.cc: Remove check for
warning being emitted.
2026-02-28 Tomasz Kamiński <tkaminsk@redhat.com>
PR libstdc++/105580
* testsuite/24_iterators/istreambuf_iterator/105580.cc: New test.
2026-02-26 Torbjörn SVENSSON <torbjorn.svensson@foss.st.com>
* testsuite/29_atomics/atomic_ref/requirements_neg.cc: Add
using std::size_t.
2026-02-26 Yuao Ma <c8ef@outlook.com>
* include/bits/atomic_base.h (__atomic_base<_PTp*>::fetch_min,
__atomic_base<_PTp*>::fetch_max,
__atomic_ref<_Pt, false, false, true>::fetch_min,
__atomic_ref<_Pt, false, false, true>::fetch_max): Define new
functions.
* include/std/atomic (atomic<_Tp*>::fetch_min,
atomic<_Tp*>::fetch_max): Likewise.
(atomic_fetch_min_explicit, atomic_fetch_max_explicit,
atomic_fetch_min, atomic_fetch_max): Change parameter from
__atomic_base<_ITp>* to atomic<_Tp>*.
* testsuite/29_atomics/atomic/pointer_fetch_minmax.cc: New test.
* testsuite/29_atomics/atomic_ref/pointer_fetch_minmax.cc: New
test.
2026-02-25 Nathan Myers <ncm@cantrip.org>
PR libstdc++/117404
* include/debug/map.h (extract, erase): Define overloads.
* include/debug/multimap.h: Same.
* include/debug/multiset.h: Same.
* include/debug/set.h: Same.
* include/debug/unordered_map: Same (2x).
* include/debug/unordered_set: Same (2x), rename some locals.
2026-02-24 Tomasz Kamiński <tkaminsk@redhat.com>
* testsuite/23_containers/mdspan/at.cc: Updated guard.
2026-02-24 Tomasz Kamiński <tkaminsk@redhat.com>
* testsuite/23_containers/mdspan/at.cc: Updated test.
2026-02-23 Tomasz Kamiński <tkaminsk@redhat.com>
* include/std/mdspan (__mdspan::__is_multi_index): Removed,
replaced with local lambda in mdspan::operator[].
(__mdspan::operator[]): Implement in terms of single overload
accepting index_type. Use __mdspan::__index_type_cast for type
conversion.
2026-02-23 Tomasz Kamiński <tkaminsk@redhat.com>
* include/std/mdspan (mdspan::at, mdspan::__index_int_t):
Define.
* testsuite/23_containers/mdspan/at.cc: New test.
2026-02-20 Jonathan Wakely <jwakely@redhat.com>
* testsuite/lib/libstdc++.exp (v3-minimum-std): Remove second
and third args in favour of using globals.
2026-02-19 Tomasz Kamiński <tkaminsk@redhat.com>
* include/std/type_traits (_CWOperators::operator++)
(_CWOperators::operator--, _CWOperators::operator+=)
(_CWOperators::operator-=, _CWOperators::operator*=)
(_CWOperators::operator/=, _CWOperators::operator%=)
(_CWOperators::operator&=, _CWOperators::operator|=)
(_CWOperators::operator^=, _CWOperators::operator<<=)
(_CWOperators::operator>>=, constant_wrapper::operator=):
Adjust definitions to apply operator on value.
* testsuite/20_util/constant_wrapper/generic.cc:
Remove test_pseudo_mutator.
* testsuite/20_util/constant_wrapper/instantiate.cc:
Test that operators are not provided if wrapped type
do not support them, or provide mutable operators.
2026-02-19 Jonathan Wakely <jwakely@redhat.com>
* testsuite/lib/libstdc++.exp (v3_default_std, v3_max_std): New
global variables.
(v3-minimum-std): Use globals instead of arguments.
(v3_modules_std): Define in terms of $v3_max_std.
(v3-dg-runtest): Use globals instead of local variables. Adjust
call to v3-min-std.
2026-02-19 Jonathan Wakely <jwakely@redhat.com>
* testsuite/lib/libstdc++.exp (v3-minimum-std): Remove special
case for c++2a and TODO comment.
* testsuite/20_util/is_pod/requirements/explicit_instantiation.cc:
Replace c++2a effective target with c++20.
* testsuite/20_util/is_pod/requirements/typedefs.cc: Likewise.
* testsuite/20_util/is_pod/value.cc: Likewise.
* testsuite/20_util/reference_wrapper/result_type.cc: Likewise.
* testsuite/20_util/reference_wrapper/typedefs-2.cc: Likewise.
* testsuite/20_util/reference_wrapper/typedefs-3.cc: Likewise.
* testsuite/20_util/result_of/sfinae_friendly_1.cc: Likewise.
* testsuite/20_util/tuple/78939.cc: Likewise.
* testsuite/20_util/uses_allocator/69293_neg.cc: Likewise.
* testsuite/20_util/uses_allocator/cons_neg.cc: Likewise.
* testsuite/20_util/variable_templates_for_traits.cc: Likewise.
* testsuite/experimental/type_traits/value.cc: Likewise.
* testsuite/ext/malloc_allocator/variadic_construct.cc:
Likewise.
* testsuite/ext/new_allocator/variadic_construct.cc: Likewise.
* testsuite/libstdc++-prettyprinters/chrono.cc: Likewise.
* testsuite/libstdc++-prettyprinters/cxx20.cc: Likewise.
* testsuite/std/ranges/iota/size.cc: Likewise.
* testsuite/tr1/3_function_objects/result_of.cc: Likewise.
2026-02-18 Patrick Palka <ppalka@redhat.com>
PR libstdc++/121402
* include/std/ranges (repeat_view::_M_value): Add
[[no_unique_address]].
* testsuite/std/ranges/adaptors/sizeof.cc
[__cpp_lib_ranges_repeat]: New test.
2026-02-17 Tomasz Kamiński <tkaminsk@redhat.com>
PR libstdc++/124124
* testsuite/29_atomics/atomic/cons/zero_padding.cc: Updated
Ctor class and move test_floating to...
* testsuite/29_atomics/atomic_float/zero_padding.cc: Extracted
test_floating.
2026-02-17 Tomasz Kamiński <tkaminsk@redhat.com>
PR libstdc++/124124
* testsuite/29_atomics/atomic/cons/zero_padding.cc: Adjust
dg-require.
2026-02-17 Jakub Jelinek <jakub@redhat.com>
* src/c++23/std.cc.in (std::submdspan_canonicalize_slices,
std::submdspan_extents): Remove exports.
(std::canonical_slices, std::subextents): New exports.
2026-02-16 Tomasz Kamiński <tkaminsk@redhat.com>
PR libstdc++/119745
* include/bits/basic_string.h (basic_string::_M_construct)
[__cplusplus >= 202302L]: Declare.
(basic_string::basic_string(basic_string&&, size_type, const _Alloc&))
(basic_string(basic_string&&, size_type, size_type, const _Alloc&))
(basic_string::substr(size_type, size_type) &&)
(basic_string::substr(size_type) &&) [__cplusplus >= 202302L]: Define.
* include/bits/basic_string.tcc (basic_string::_M_construct)
[__cplusplus >= 202302L]: Define.
* testsuite/21_strings/basic_string/operations/substr/rvalue.cc: New test.
2026-02-16 Tomasz Kamiński <tkaminsk@redhat.com>
* include/std/mdspan (std::submdspan_extents): Rename to...
(std::subextents): Renamed from submdspan_extents.
(std::submdspan_canonicalize_slices): Rename to...
(std::canonical_slices): Renamed from submdspan_canonicalize_slices.
* testsuite/23_containers/mdspan/submdspan/submdspan_canonicalize_slices.cc:
Move to...
* testsuite/23_containers/mdspan/submdspan/canonical_slices.cc: ...here.
Updated calls to submdspan_canonicalize_slices.
* testsuite/23_containers/mdspan/submdspan/submdspan_canonicalize_slices_neg.cc:
Move to...
* testsuite/23_containers/mdspan/submdspan/canonical_slices_neg.cc: ...here.
Updated calls to submdspan_canonicalize_slices.
* testsuite/23_containers/mdspan/submdspan/submdspan_extents.cc: Move to...
* testsuite/23_containers/mdspan/submdspan/subextents.cc: ...here.
Qualified and renamed calls to submdspan_extents.
* testsuite/23_containers/mdspan/submdspan/submdspan_extents_neg.cc: Move to...
* testsuite/23_containers/mdspan/submdspan/subextents_neg.cc: ...here.
Qualified and renamed calls to submdspan_extents.
2026-02-16 Ivan Lazaric <ivan.lazaric1@gmail.com>
Jonathan Wakely <jwakely@redhat.com>
* include/bits/fs_path.h: Include bits/formatfwd.h.
(std::formatter<filesystem::path, _CharT>): Define.
* include/bits/version.def (format_path): Define.
* include/bits/version.h: Regenerate.
* include/std/filesystem: Expose __cpp_lib_format_path.
* testsuite/std/format/fs_path.cc: New test.
2026-02-13 Tomasz Kamiński <tkaminsk@redhat.com>
* testsuite/20_util/scoped_allocator/construct_pair_c++2a.cc
(__gnu_test::uneq_allocator(int)): Declare as explicit.
* testsuite/std/memory/indirect/ctor.cc: Construct uneq_allocator
from int explicitly.
* testsuite/std/memory/polymorphic/ctor.cc: Likewise.
* testsuite/std/memory/polymorphic/ctor_poly.cc: Likewise.
* testsuite/util/testsuite_allocator.h: Likewise.
2026-02-13 Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/121771
* include/std/tuple (tuple::tuple(const Elements&...)): Use
type_identity_t to prevent constructor being used for CTAD.
(tuple::tuple(allocator_arg_t, const A&, const Elements&...)):
Likewise.
* testsuite/20_util/tuple/cons/121771.cc: New test.
2026-02-12 Patrick Palka <ppalka@redhat.com>
* include/bits/regex_executor.tcc (_Executor::_M_rep_once_more):
Make unnused _Match_mode parameter unnamed.
(_Executor::_M_handle_repeat): Likewise.
(_Executor::_M_handle_subexpr_begin): Likewise.
(_Executor::_M_handle_subexpr_end): Likewise.
(_Executor::_M_handle_line_begin_assertion): Likewise.
(_Executor::_M_handle_line_end_assertion): Likewise.
(_Executor::_M_handle_match): Likewise.
(_Executor::_M_handle_backref): Likewise.
(_Executor::_M_handle_alternative): Likewise.
2026-02-12 Xi Ruoyao <xry111@xry111.site>
Jonathan Wakely <jwakely@redhat.com>
* testsuite/17_intro/badnames.cc (__unused): Do not define.
* testsuite/17_intro/names.cc [glibc == 2.43] (__unused): Undef.
2026-02-12 Jonathan Wakely <jwakely@redhat.com>
* include/std/type_traits (is_function): Declare before first
use.
2026-02-12 Patrick Palka <ppalka@redhat.com>
PR libstdc++/114865
* include/std/atomic (atomic<_Tp>::atomic(_Tp)) [C++11]:
Enable __builtin_clear_padding logic.
* testsuite/29_atomics/atomic/compare_exchange_padding.cc: Enable
this test in earlier modes, including C++11.
* testsuite/29_atomics/atomic/cons/zero_padding.cc [C++11]:
Enable tests verifying cleared padding bits for a non-static-init
std::atomic object.
2026-02-11 Tomasz Kamiński <tkaminsk@redhat.com>
* include/bits/funcref_impl.h (function_ref::function_ref(_Fn&&)):
Use _S_static and _S_nttp invokers.
* include/bits/funcwrap.h (_Base_invoker::_S_static):
Define.
* include/bits/stl_function.h (std::__is_std_op_template)
(std::__is_std_op_wrapper) [__cplusplus > 201703L]:
Moved from std/ranges.
* include/std/ranges (__detail::__is_std_op_template)
(__detail::__is_std_op_wrapper): Moved to bits/stl_function.h.
* testsuite/20_util/function_ref/dangling.cc: New test.
* testsuite/20_util/function_ref/dangling_neg.cc: New test.
2026-02-11 Tomasz Kamiński <tkaminsk@redhat.com>
PR libstdc++/123875
* testsuite/29_atomics/atomic/cons/static_zero_padding.cc: Move to...
* testsuite/29_atomics/atomic/cons/zero_padding.cc: ...here and
added heap tests. Also fixed trailing whitespaces.
2026-02-11 Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/123908
* config/abi/pre/gnu.ver (GLIBCXX_3.4.35): Add exports for
std::__get_once_callable and std::__get_once_call.
2026-02-11 Jonathan Wakely <jwakely@redhat.com>
* include/bits/regex.tcc (__detail::__lookup_collatename): New
function.
(regex_traits::lookup_collatename): Use new function. Elide
redundant narrowing via ctype facet for regex_traits<char>.
(regex_traits::lookup_classname): Replace lookup table with
handwritten prefix match.
2026-02-11 Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/124015
* include/bits/regex.tcc (regex_traits::lookup_classname): Fix
handling of icase parameter.
2026-02-11 Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/124015
* testsuite/28_regex/traits/char/lookup_classname.cc: Check for
correct result for unrecognized classname. Check that lookup is
case insensitive. Check that all required classnames are
recognized. Check that icase flag only affects "lower" and
"upper".
* testsuite/28_regex/traits/wchar_t/lookup_classname.cc:
Likewise.
2026-02-10 Tomasz Kamiński <tkaminsk@redhat.com>
PR libstdc++/123875
* include/bits/atomic_base.h (__atomic_impl::__clear_padding):
Use if constexpr unconditionally.
(__atomic_float<_Fp>::__atomic_float(_Fp)): Skip __clear_padding
call for constant evaluation.
* include/std/atomic (atomic<_Tp>::atomic(_Tp)): Likewise.
* testsuite/29_atomics/atomic/cons/static_zero_padding.cc: New test.
2026-02-10 Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/123991
* include/bits/basic_string.h (compare(size_type, size_type, T)):
Remove noexcept-specifier.
(compare(size_type, size_type, T, size_type, size_type)):
Likewise.
* include/bits/cow_string.h (compare(size_type, size_type, T)):
Remove noexcept-specifier.
(compare(size_type, size_type, T, size_type, size_type)):
Likewise.
* testsuite/21_strings/basic_string/operations/compare/char/123991.cc:
New test.
* testsuite/21_strings/basic_string/operations/compare/wchar_t/123991.cc:
New test.
2026-02-10 Patrick Palka <ppalka@redhat.com>
* include/bits/regex.h (_Executor): Remove __dfs_mode template
parameter and _V2 inline namespace.
* include/bits/regex.tcc (__regex_algo_impl): Adjust after
__dfs_mode template parameter removal.
* include/bits/regex_executor.h (_Executor): Remove __dfs_mode
parameter and _V2 inline namespace.
* include/bits/regex_executor.tcc (_Executor): Likewise.
2026-02-10 Patrick Palka <ppalka@redhat.com>
* include/bits/regex.tcc (__regex_algo_impl): Pass __use_dfs
parameter to _Executor's constructor.
* include/bits/regex_executor.h (_Executor::_Search_mode): New.
(_Executor::_Executor): Add __use_dfs parameter and initialize
_M_search_mode. Adjust after inlining _State_info members into
_Executor.
(_Executor::~_Executor): Free _M_visted_states.
(_Executor::_M_main): Adjust after renaming _M_main_dispatch
overloads to _M_main_dfs and _M_main_bfs.
(_Executor::_State_info): Remove.
(_Executor::_M_visited): Inlined from _State_info.
(_Executor::_M_get_sol_pos): Likewise.
(_Executor::_M_states): Remove.
(_Executor::_M_start): Inlined from _State_info.
(_Executor::_M_sol_pos): Likewise.
(_Executor::_M_match_queue): Likewise.
(_Executor::_M_search_mode): New.
* include/bits/regex_executor.tcc (_Executor::_M_main_dispatch):
Renamed to...
(_Executor::_M_main_dfs, _Executor::_M_main_bfs): ... these.
(_Executor::_M_*): Adjust after _M_states removal.
(_Executor::_M_lookhead): Also adjust _Executor constructor
call.
2026-02-09 Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/124024
* include/bits/out_ptr.h (out_ptr): Fix doxygen comment to refer
to the right function.
(inout_ptr): Improve markup in doxygen comment.
2026-02-06 Tomasz Kamiński <tkaminsk@redhat.com>
* include/bits/hashtable.h (std::__heterogeneous_hash_key)
[__glibcxx_associative_heterogeneous_erasure]: Changed guard.
* include/bits/stl_tree.h (std::__heterogeneous_tree_key)
[__glibcxx_associative_heterogeneous_erasure]: Likewise.
* include/bits/stl_function.h: Add comment with C++ version
for __glibcxx_associative_heterogeneous_erasure guard.
2026-02-06 Nathan Myers <ncm@cantrip.org>
* include/bits/stl_function.h (concept __heterogeneous_key):
Guard with __glibcxx_associative_heterogeneous_erasure
2026-02-06 Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/120567
* acinclude.m4 (GLIBCXX_ENABLE_BACKTRACE): Include "__sync_" in
grep command to check for extern calls to libatomic.
* configure: Regenerate.
2026-02-06 Jonathan Wakely <jwakely@redhat.com>
* testsuite/Makefile.am (new-abi-baseline): Overwrite existing
file instead of creating baseline_symbols.txt.new.
* testsuite/Makefile.in: Regenerate.
2026-02-06 Nathan Myers <ncm@cantrip.org>
* include/bits/stl_function.h (__heterogeneous_key): Use
C++17-defined remove_cvref<>::type instead.
2026-02-05 Caolán McNamara <caolanm@gmail.com>
* include/bits/regex.tcc (regex_traits::lookup_collatename):
Make __collatenames array const.
2026-02-05 Jonathan Wakely <jwakely@redhat.com>
* include/std/contracts (contract_violation::location): Use
source_location default constructor and then set _M_impl.
* include/std/source_location (source_location(const void*)):
Remove constructor.
* testsuite/18_support/contracts/includes.cc: Move to...
* testsuite/18_support/contracts/srcloc.cc: ...here. Test for
ambiguity caused by new constructor.
2026-02-05 Jonathan Wakely <jwakely@redhat.com>
* python/libstdcxx/v6/printers.py (SharedPointerPrinter): Only
use gdb.Type.is_scalar if supported.
* testsuite/libstdc++-prettyprinters/compat.cc: Test printer for
old implementation of std::atomic<std::shared_ptr<T>>.
2026-02-05 Jonathan Wakely <jwakely@redhat.com>
* testsuite/28_regex/algorithms/regex_match/multiline.cc: Add
string to static_assert.
* testsuite/28_regex/sub_match/lwg3204.cc: Likewise.
2026-02-04 Nathan Myers <ncm@cantrip.org>
PR libstdc++/117404
* include/bits/version.def (associative_heterogeneous_erasure):
Define.
* include/bits/version.h: Regenerate.
* include/std/map: Request new feature from version.h.
* include/std/set: Same.
* include/std/unordered_map: Same.
* include/std/unordered_set: Same.
* include/bits/stl_map.h (extract, erase): Define overloads.
* include/bits/stl_set.h: Same.
* include/bits/stl_multimap.h: Same.
* include/bits/stl_multiset.h: Same.
* include/bits/unordered_map.h: Same, 2x.
* include/bits/unordered_set.h: Same, 2x.
* include/bits/stl_function.h (concepts __not_container_iterator,
__heterogeneous_key): Define.
* include/bits/hashtable.h (_M_find_before_node, _M_locate, extract):
Delegate to more-general _tr version.
(_M_find_before_node_tr, _M_locate_tr, _M_extract_tr, _M_erase_tr):
Add new members to support a heterogeneous key argument.
(_M_erase_some): Add new helper function.
(concept __heterogeneous_hash_key): Define.
* include/bits/stl_tree.h (_M_lower_bound_tr, _M_upper_bound_tr,
_M_erase_tr, _M_extract_tr): Add new members to support a
heterogeneous key argument.
(concept __heterogeneous_tree_key): Define.
* testsuite/23_containers/map/modifiers/hetero/erase.cc: New test.
* testsuite/23_containers/multimap/modifiers/hetero/erase.cc: Same.
* testsuite/23_containers/multiset/modifiers/hetero/erase.cc: Same.
* testsuite/23_containers/set/modifiers/hetero/erase.cc: Same.
* testsuite/23_containers/unordered_map/modifiers/hetero/erase.cc: Same.
* testsuite/23_containers/unordered_multimap/modifiers/hetero/erase.cc:
Same.
* testsuite/23_containers/unordered_multiset/modifiers/hetero/erase.cc:
Same.
* testsuite/23_containers/unordered_set/modifiers/hetero/erase.cc: Same.
2026-02-03 Marek Polacek <polacek@redhat.com>
* include/bits/new_allocator.h (__new_allocator::allocate,
__new_allocator::deallocate): Add missing constexpr.
2026-02-03 Jakub Jelinek <jakub@redhat.com>
PR libstdc++/123921
* include/bits/version.def (define_static): New with the
same values as reflection.
* include/bits/version.h: Regenerate.
* include/std/meta: Define also __glibcxx_want_define_static before
including bits/version.h.
2026-02-02 Patrick Palka <ppalka@redhat.com>
* include/bits/regex_executor.tcc (_ExecutorFrameBase):
Zero-initialize _M_byte0.
(_ExecutorFrameBase::_M_end): Rename to ...
(_ExecutorFrameBase::_M_subexpr_end): ... this.
(_Executor::_M_handle_subexpr_begin): Remove now redundant
clearing of _M_subexpr_end.
(_Executor::_M_handle_subexpr_end): Adjust after renaming.
(_Executor::_M_dfs) <case _S_fopcode_restore_cur_results>:
Likewise.
2026-01-31 Patrick Palka <ppalka@redhat.com>
* include/bits/regex_executor.tcc (_ExecutorFrameBase): Add
#pragma GCC diagnostic to suppress -Wpedantic warning about
anonymous structs.
2026-01-30 Patrick Palka <ppalka@redhat.com>
* include/bits/regex_executor.tcc (__detail::_Executor::_M_node)
[__OPTIMIZE__]: Add [[gnu::always_inline]] attribute. Declare
inline.
2026-01-30 Patrick Palka <ppalka@redhat.com>
PR libstdc++/86164
* include/bits/regex_executor.tcc (__detail::_ExecutorFrameOpcode):
Remove _S_fopcode_restore_current.
(__detail::_Executor::_M_handle_repeat): Pass _M_current when
pushing a fallback_next or fallback_rep_once_more frame.
(__detail::_Executor::_M_handle_match): Don't push a
restore_current frame.
(__detail::_Executor::_M_handle_backref): Likewise and simplify
accordingly.
(__detail::_Executor::_M_handle_alternative): Pass _M_current when
pushing a fallback_next or posix_alternative frame.
(__detail::_Executor::_M_dfs) <case _S_fopcode_fallback_next>:
Restore _M_current.
<case _S_fopcode_fallback_rep_once_more>: Likewise.
<case _S_fopcode_posix_alternative>: Likewise.
<case _S_fopcode_restore_current>: Remove.
2026-01-30 Patrick Palka <ppalka@redhat.com>
PR libstdc++/86164
* include/bits/regex.h (__detail::_Executor): Use inline
namespace _V2.
* include/bits/regex_executor.h (__detail::_ExecutorFrame):
Declare.
(__detail::_Executor): Use inline namespace _V2.
(__detail::_Executor::_M_node): Declare.
(__detail::_Executor::_M_frames): New data member.
* include/bits/regex_executor.tcc (__detail::_ExecutorFrameOpcode):
New.
(__detail::_ExecutorFrameBase): New.
(__detail::_ExecutorFrame): New.
(__detail::_Executor): Use inline namespace _V2.
(__detail::_Executor::_M_rep_once_more): Replace recursive
_M_dfs calls with an _S_opcode_next frame push, and any work
after such calls with an appropriate frame push.
(__detail::_M_handle_repeat): Likewise.
(__detail::_M_handle_subexpr_begin): Likewise.
(__detail::_M_handle_subexpr_end): Likewise.
(__detail::_M_handle_line_begin_assertion): Likewise.
(__detail::_M_handle_line_end_assertion): Likewise.
(__detail::_M_handle_word_boundary): Likewise.
(__detail::_M_handle_subexpr_lookahead): Likewise.
(__detail::_M_handle_match): Likewise.
(__detail::_M_handle_backref): Likewise.
(__detail::_M_handle_accept): Likewise.
(__detail::_M_handle_alternative): Likewise.
(__detail::_M_node): Factored out from _M_dfs.
(__detail::_M_dfs): Push an initial frame to _M_frames that
visits the starting node and pass this stack each subroutine.
Pop the latest _ExecutorFrame from _M_frames and handle
appropriately according to its _ExecutorFrameOpcode. Loop until
_M_frames is empty.
2026-01-29 Jonathan Wakely <jwakely@redhat.com>
* include/std/expected (__expected::__trivially_replaceable)
(__expected::__usable_for_assign)
(__expected::__usable_for_trivial_assign)
(__expected::__can_reassign_type): New concepts.
(expected::operator=): Adjust constraints
on existing overloads and add defaulted overload.
(expected<cv void, E>::operator=): Likewise.
* testsuite/20_util/expected/requirements.cc: Check for trivial
and nothrow properties of assignments.
2026-01-29 Jonathan Wakely <jwakely@redhat.com>
* include/std/source_location: Check __glibcxx_contracts instead
of __cpp_lib_contracts.
* testsuite/18_support/contracts/includes.cc: New test.
2026-01-29 vspefs <vspefs@protonmail.com>
* src/c++23/std.cc.in (invoke_default_violation_handler): Change
to invoke_default_contract_violation_handler.
2026-01-29 Jonathan Wakely <jwakely@redhat.com>
* include/std/contracts: Replace non-ASCII characters.
2026-01-28 Jonathan Wakely <jwakely@redhat.com>
* src/experimental/Makefile.am: Change AM_CXXFLAGS to use C++20
by default.
2026-01-28 Jonathan Wakely <jwakely@redhat.com>
* src/experimental/contract26.cc: Use #error if built without
contracts support enabled.
* include/std/source_location: Remove stray whitespace.
2026-01-28 Jonathan Wakely <jwakely@redhat.com>
PR tree-optimization/122197
* include/bits/shared_ptr_base.h (~_Sp_counted_deleter): Use
diagnostic pragam to disable -Wfree-nonheap-object false
positive.
(~_Sp_counted_ptr_inplace): Likewise for -Warray-bounds false
positive.
2026-01-28 Jonathan Wakely <jwakely@redhat.com>
* config/locale/gnu/ctype_members.cc (use_table): New function.
(ctype<wchar_t>::do_narrow): Use use_table.
2026-01-28 Soumya AR <soumyaa@nvidia.com>
* include/bits/atomic_base.h:
Add fetch_min and fetch_max memberfunctions.
* include/bits/version.def:
Add __cpp_lib_atomic_min_max feature test macro.
* include/bits/version.h (defined): Regenerate.
* include/std/atomic: Extend for fetch_min/max non-member functions.
* src/c++23/std.cc.in: Export atomic_fetch_min, atomic_fetch_max,
atomic_fetch_min_explicit, atomic_fetch_max_explicit.
* testsuite/29_atomics/atomic_integral/nonmembers_fetch_minmax.cc:
New test.
* testsuite/29_atomics/atomic_ref/integral_fetch_minmax.cc: New test.
2026-01-28 Nina Ranns <dinka.ranns@gmail.com>
Iain Sandoe <iain@sandoe.co.uk>
Ville Voutilainen <ville.voutilainen@gmail.com>
* include/Makefile.am: Add contract include.
* include/Makefile.in: Regenerate.
* include/bits/version.def: Add ftm for contracts.
* include/bits/version.h: Regenerate.
* include/precompiled/stdc++.h: Add contracts header.
* include/std/source_location: Befriend the contract_violation
class so that we can initialise a source_location from an
existing __impl *.
* src/c++23/std.cc.in: Add contracts support.
* src/experimental/Makefile.am: Add new contract violation
implementation, remove the old one.
* src/experimental/Makefile.in: Regenerate.
* include/experimental/contract: Removed.
* src/experimental/contract.cc: Removed.
* include/std/contracts: New file.
* src/experimental/contract26.cc: New file.
* testsuite/18_support/contracts/invoke_default_cvh.cc: New test.
* testsuite/18_support/contracts/invoke_default_cvh2.cc: New test.
2026-01-23 Tomasz Kamiński <tkaminsk@redhat.com>
PR libstdc++/123758
* include/bits/funcwrap.h (_Cpy_base(_Cpy_base const&)):
Explicitly call _Mo_base() in initializer list.
2026-01-22 Frank Scheiner <frank.scheiner@web.de>
* config/abi/post/ia64-linux-gnu/baseline_symbols.txt:
Regenerate.
2026-01-20 Jakub Jelinek <jakub@redhat.com>
* include/bits/version.def (reflection): Add cxx11abi = yes;.
* include/bits/version.h: Regenerate.
2026-01-19 Tomasz Kamiński <tkaminsk@redhat.com>
PR libstdc++/114153
* include/bits/ranges_cmp.h (__detail::__less_builtin_ptr_cmp):
Add __not_overloaded_spaceship spaceship check.
* include/bits/stl_function.h (greater<void>::operator())
(less<void>::operator(), greater_equal<void>::operator())
(less_equal<void>::operator()): Implement using if constexpr.
(greater<void>::__S_cmp, less<void>::__S_cmp)
(greater_equal<void>::__ptr_comp, less_equal<void>::S_cmp):
Remove.
(greater<void>::__ptr_cmp, less<void>::__ptr_cmp)
(greater_equal<void>::__ptr_comp, less_equal<void>::ptr_cmp): Change
tostatic constexpr variable. Define in terms of requires expressions
and __not_overloaded_spaceship check.
* include/std/concepts: (__detail::__not_overloaded_spaceship):
Define.
* libsupc++/compare: (__detail::__3way_builtin_ptr_cmp): Use
__not_overloaded_spaceship concept.
* testsuite/20_util/function_objects/comparisons_pointer_spaceship.cc: New test.
2026-01-19 Tomasz Kamiński <tkaminsk@redhat.com>
* include/bits/erase_if.h (__detail::__erase_if): Pass mutable
iterators to __cont.erase.
2026-01-19 François Dumont <frs.dumont@gmail.com>
* include/bits/erase_if.h (__detail::__erase_if): New.
* include/debug/deque (std::erase_if<>(__debug::deque<>&, _Pred)): Use latter.
* include/debug/inplace_vector (std::erase_if<>(__debug::inplace_vector<>&, _Pred)):
Likewise.
* include/debug/vector (std::erase_if<>(__debug::vector<>&, _Pred)): Likewise.
* include/std/deque: Include erase_if.h.
(std::erase_if<>(std::vector<>&, _Pred)): Adapt to use __detail::__erase_if.
* include/std/inplace_vector (std::erase_if<>(std::inplace_vector<>&, _Pred)):
Likewise.
* include/std/string (std::erase_if<>(std::basic_string<>&, _Pred)): Likewise.
* include/std/vector (std::erase_if<>(std::vector<>&, _Pred)): Likewise.
* include/debug/forward_list
(std::erase_if<>(__debug::forward_list<>&, _Pred)): New.
(std::erase<>(__debug::forward_list<>&, const _Up&)): New.
* include/debug/list
(std::erase_if<>(__debug::list<>&, _Pred)): New.
(std::erase<>(__debug::list<>&, const _Up&)): New.
* include/debug/map (std::erase_if<>(__debug::map<>&, _Pred)): New.
(std::erase_if<>(__debug::multimap<>&, _Pred)): New.
* include/debug/set (std::erase_if<>(__debug::set<>&, _Pred)): New.
(std::erase_if<>(__debug::multiset<>&, _Pred)): New.
* include/debug/string
(std::erase_if<>(__gnu_debug::basic_string<>&, _Pred)): New.
(std::erase<>(__gnu_debug::basic_string<>&, const _Up&)): New.
* include/debug/unordered_map
(std::erase_if<>(__debug::unordered_map<>&, _Pred)): New.
(std::erase_if<>(__debug::unordered_multimap<>&, _Pred)): New.
* include/debug/unordered_set
(std::erase_if<>(__debug::unordered_set<>&, _Pred)): New.
(std::erase_if<>(__debug::unordered_multiset<>&, _Pred)): New.
* include/std/forward_list (std::erase_if<>(std::forward_list<>&, _Pred)):
Adapt to work exclusively for normal implementation.
(std::erase<>(std::forward_list<>&, const _Up&)): Likewise.
* include/std/list (std::erase_if<>(std::list<>&, _Pred)): Likewise.
(std::erase<>(std::list<>&, const _Up&)): Likewise.
* include/std/map (std::erase_if<>(std::map<>&, _Pred)): Likewise.
(std::erase_if<>(std::multimap<>&, _Pred)): Likewise.
Guard functions using __cpp_lib_erase_if.
* include/std/set (std::erase_if<>(std::set<>&, _Pred)): Likewise.
(std::erase_if<>(std::multiset<>&, _Pred)): Likewise.
Guard functions using __cpp_lib_erase_if.
* include/std/unordered_map
(std::erase_if<>(std::unordered_map<>&, _Pred)): Likewise.
(std::erase_if<>(std::unordered_multimap<>&, _Pred)): Likewise.
Guard functions using __cpp_lib_erase_if.
* include/std/unordered_set
(std::erase_if<>(std::unordered_set<>&, _Pred)): Likewise.
(std::erase_if<>(std::unordered_multiset<>&, _Pred)): Likewise.
Guard functions using __cpp_lib_erase_if.
* testsuite/21_strings/basic_string/debug/erase.cc: New test case.
* testsuite/23_containers/forward_list/debug/erase.cc: New test case.
* testsuite/23_containers/forward_list/debug/invalidation/erase.cc: New test case.
* testsuite/23_containers/list/debug/erase.cc: New test case.
* testsuite/23_containers/list/debug/invalidation/erase.cc: New test case.
* testsuite/23_containers/map/debug/erase_if.cc: New test case.
* testsuite/23_containers/map/debug/invalidation/erase_if.cc: New test case.
* testsuite/23_containers/multimap/debug/erase_if.cc: New test case.
* testsuite/23_containers/multimap/debug/invalidation/erase_if.cc: New test case.
* testsuite/23_containers/multiset/debug/erase_if.cc: New test case.
* testsuite/23_containers/multiset/debug/invalidation/erase_if.cc: New test case.
* testsuite/23_containers/set/debug/erase_if.cc: New test case.
* testsuite/23_containers/set/debug/invalidation/erase_if.cc: New test case.
* testsuite/23_containers/unordered_map/debug/erase_if.cc: New test case.
* testsuite/23_containers/unordered_map/debug/invalidation/erase_if.cc: New test case.
* testsuite/23_containers/unordered_multimap/debug/erase_if.cc: New test case.
* testsuite/23_containers/unordered_multimap/debug/invalidation/erase_if.cc: New test case.
* testsuite/23_containers/unordered_multiset/debug/erase_if.cc: New test case.
* testsuite/23_containers/unordered_multiset/debug/invalidation/erase_if.cc: New test case.
* testsuite/23_containers/unordered_set/debug/erase_if.cc: New test case.
* testsuite/23_containers/unordered_set/debug/invalidation/erase_if.cc: New test case.
2026-01-15 Jakub Jelinek <jakub@redhat.com>
* include/std/type_traits (std::is_reflection, std::is_fundamental,
std::is_reflection_v, std::is_consteval_only): Compare
__cpp_impl_reflection >= 202506L instead of 202500L.
* testsuite/20_util/variable_templates_for_traits.cc: Likewise.
2026-01-15 Marek Polacek <polacek@redhat.com>
Jakub Jelinek <jakub@redhat.com>
PR c++/120775
PR c++/123081
PR c++/122634
* include/Makefile.am (std_headers): Add ${std_srcdir}/meta.
* include/Makefile.in: Regenerate.
* include/bits/iterator_concepts.h (std::ranges::__access::__begin): Add
constexpr.
* include/bits/version.def (reflection): New.
* include/bits/version.h: Regenerate.
* include/precompiled/stdc++.h: Include <meta> for C++26.
* include/std/meta: New file.
* include/std/type_traits (std::is_reflection): New trait.
(std::is_fundamental): Include is_reflection for C++26 -freflection.
(std::is_reflection_v): New variable template.
(std::is_consteval_only): New trait.
(std::is_consteval_only_v): New variable template.
* src/c++23/std.cc.in: Add <meta> exports.
* testsuite/20_util/variable_templates_for_traits.cc: Add -freflection as
dg-additional-options for C++26. Add std::is_reflection_v test in that case.
* testsuite/20_util/is_consteval_only/requirements/explicit_instantiation.cc: New test.
* testsuite/20_util/is_consteval_only/requirements/typedefs.cc: New test.
* testsuite/20_util/is_consteval_only/value.cc: New test.
* testsuite/20_util/is_reflection/requirements/explicit_instantiation.cc: New test.
* testsuite/20_util/is_reflection/requirements/typedefs.cc: New test.
* testsuite/20_util/is_reflection/value.cc: New test.
2026-01-14 Tomasz Kamiński <tkaminsk@redhat.com>
* testsuite/util/testsuite_iterators.h: Modify comment.
2026-01-13 Tomasz Kamiński <tkaminsk@redhat.com>
* include/bits/stl_heap.h (std::__is_heap_until, std::__push_heap)
(std::__adjust_heap): Replace subscript with dereference of
advanced iterator.
* testsuite/util/testsuite_iterators.h (__gnu_test::subscript_proxy)
(__gnu_test::proxy_random_access_iterator_wrapper): Define.
* testsuite/25_algorithms/sort_heap/check_proxy_brackets.cc: New test.
2026-01-12 Jakub Jelinek <jakub@redhat.com>
* config/abi/pre/gnu.ver (CXXABI_1.3.14): Don't export _ZTI*DF16_ on
s390x.
(CXXABI_1.3.17): Export _ZTI*DF16_ on s390x.
* config/abi/post/s390x-linux-gnu/baseline_symbols.txt: Remove
_ZTI{,P,K}DF16_.
2026-01-12 Jonathan Wakely <jwakely@redhat.com>
* src/c++20/atomic.cc (__detail::__spin_impl): Do not use
reserved names for variables.
2026-01-12 Jonathan Wakely <jwakely@redhat.com>
* include/bits/atomic_wait.h (__wait_args): Improve comments.
* src/c++20/atomic.cc (__wait_args::_M_setup_proxy_wait):
Improve comment.
2026-01-12 Tomasz Kamiński <tkaminsk@redhat.com>
* testsuite/26_numerics/random/uniform_real_distribution/operators/gencanon.cc:
Updated test.
2026-01-10 Stefan Schulze Frielinghaus <stefansf@gcc.gnu.org>
* config/abi/post/s390x-linux-gnu/baseline_symbols.txt: Add
names {,P,K}DF16.
2026-01-10 Wang Jinghao <zheng.xianyuwang@gmail.com>
* src/c++11/system_error.cc (system_error_category) [_WIN32]:
Use FormatMessageA function instead of FormatMessage macro.
* testsuite/19_diagnostics/error_category/system_category.cc:
Fix typo in __MINGW32__ macro name. Adjust behavior on the
mingw32 target.
2026-01-10 Yuao Ma <c8ef@outlook.com>
* include/bits/version.def: Add FTM.
* include/bits/version.h: Regenerate.
* include/std/flat_map: Add constexpr.
* testsuite/23_containers/flat_map/1.cc: Add constexpr test.
* testsuite/23_containers/flat_multimap/1.cc: Add constexpr test.
2026-01-09 Jonathan Wakely <jwakely@redhat.com>
* src/c++20/atomic.cc (use_proxy_wait): Remove unused second
parameter.
(__wait_args::_M_setup_proxy_wait): Remove second argument.
(__notify_impl): Likewise.
2026-01-09 Jonathan Wakely <jwakely@redhat.com>
* include/bits/atomic_timed_wait.h (__atomic_wait_address_until):
Use _M_on_wake instead of _M_setup_wait after waking.
(__atomic_wait_address_for): Likewise.
* include/bits/atomic_wait.h (__atomic_wait_address): Likewise.
(__wait_args::_M_setup_wait): Remove third parameter and move
code to update _M_old to ...
(__wait_args::_M_on_wake): New member function to update _M_old
after waking, only calling _M_setup_proxy_wait if needed.
(__wait_args::_M_store): New member function to update _M_old
from a value, for non-proxy waits.
* src/c++20/atomic.cc (__wait_args::_M_setup_proxy_wait): If
_M_obj is not addr, only load a new value and return true.
2026-01-09 Jonathan Wakely <jwakely@redhat.com>
Tomasz Kamiński <tkaminsk@redhat.com>
PR libstdc++/122878
* include/bits/semaphore_base.h (_M_try_acquire): Replace
_M_try_acquire_for call with explicit loop and call to
__atomic_wait_address_for.
(_M_try_acquire_for): Replace loop with call to
_M_try_acquire_until.
2026-01-09 Keith Packard <keithp@keithp.com>
* acinclude.m4 (GLIBCXX_CONFIGURE): Add --with-picolibc.
* configure: Regenerate.
* configure.ac: Add handling for with_picolibc=yes.
* config/os/picolibc/ctype_base.h: New file.
* config/os/picolibc/ctype_configure_char.cc: New file.
* config/os/picolibc/ctype_inline.h: New file.
* config/os/picolibc/os_defines.h: New file.
2026-01-08 Tomasz Kamiński <tkaminsk@redhat.com>
* testsuite/20_util/variant/constinit.cc: Use scan-tree-dump
for matching of constructor.
* testsuite/20_util/variant/constinit_compat.cc: Likewise.
* testsuite/lib/libstdc++.exp: Load scantree.exp and scandump.exp.
2026-01-07 Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/123100
* include/std/sstream (basic_stringbuf::str()&&): Handle the
case where _M_string is not being used for the buffer.
* testsuite/27_io/basic_stringbuf/str/char/123100.cc: New test.
2026-01-07 Jonathan Wakely <jwakely@redhat.com>
* include/bits/atomic_wait.h (__wait_args::_M_setup_wait):
Remove unreachable return statement.
2026-01-07 Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/123406
* acinclude.m4 (GLIBCXX_CHECK_STDIO_LOCKING): Override detection
of flockfile for non-cygwin newlib targets.
* configure: Regenerate.
2026-01-07 Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/123378
* include/std/barrier (~__tree_barrier_base): Define.
2026-01-07 Jakub Jelinek <jakub@redhat.com>
PR libstdc++/123183
PR libstdc++/123326
* libsupc++/exception (std::bad_exception::~bad_exception(),
std::bad_exception::what()): Add inline keyword and
[[__gnu__::__gnu_inline__]] attribute to the C++26 constexpr
exceptions definitions.
* libsupc++/exception.h (std::exception::~exception(),
std::exception::what()): Likewise.
* libsupc++/exception_ptr.h (std::exception_ptr::exception_ptr(void*)):
Likewise.
* libsupc++/nested_exception.h
(std::nested_exception::~nested_exception()): Likewise.
* libsupc++/typeinfo (std::bad_cast::~bad_cast(),
std::bad_cast::what(), std::bad_typeid::~bad_typeid(),
std::bad_typeid::what()): Likewise.
* include/bits/new_except.h (std::bad_alloc::~bad_alloc(),
std::bad_alloc::what(),
std::bad_array_new_length::~bad_array_new_length(),
std::bad_array_new_length::what()): Likewise.
* include/bits/stdexcept_except.h
(std::logic_error::logic_error(const string&),
std::logic_error::logic_error(const char*),
std::logic_error::~logic_error(), std::logic_error::what(),
std::domain_error::domain_error(const string&),
std::domain_error::domain_error(const char*),
std::invalid_argument::invalid_argument(const string&),
std::invalid_argument::invalid_argument(const char*),
std::length_error::length_error(const string&),
std::length_error::length_error(const char*),
std::out_of_range::out_of_range(const string&),
std::out_of_range::out_of_range(const char*),
std::runtime_error::runtime_error(const string&),
std::runtime_error::runtime_error(const char*),
std::runtime_error::~runtime_error(), std::runtime_error::what(),
std::overflow_error::overflow_error(const string&),
std::overflow_error::overflow_error(const char*),
std::overflow_error::~overflow_error(),
std::underflow_error::underflow_error(const string&),
std::underflow_error::underflow_error(const char*),
std::underflow_error::~underflow_error()): Likewise.
(std::domain_error::~domain_error(),
std::invalid_argument::~invalid_argument(),
std::length_error::~length_error(),
std::out_of_range::~out_of_range()): Likewise. Also change
_GLIBCXX_NOTHROW to noexcept on those definitions.
Copyright (C) 2026 Free Software Foundation, Inc.
Copying and distribution of this file, with or without modification,
are permitted in any medium without royalty provided the copyright
notice and this notice are preserved.
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