2022-02-11 Jonathan Wakely * testsuite/20_util/temporary_buffer.cc: Fix dg-warning target selector. 2022-02-11 Jonathan Wakely * testsuite/20_util/monotonic_buffer_resource/allocate.cc: Ignore -Walloc-larger-than warning. * testsuite/20_util/unsynchronized_pool_resource/allocate.cc: Likewise. * testsuite/29_atomics/atomic/cons/user_pod.cc: Compile with -O1 to avoid linker error for __atomic_is_lock_free. 2022-02-10 Thomas Rodgers * include/bits/atomic_wait.h (__waiter_base::_S_do_spin, __waiter_base::_S_do_spin_v): Change memory order from relaxed to acquire. 2022-02-10 Jonathan Wakely * include/c_compatibility/stdatomic.h (atomic_fetch_xor): Add using-declaration. (atomic_fetch_xor_explicit): Likewise. * testsuite/29_atomics/headers/stdatomic.h/c_compat.cc: Check arithmetic and logical operations for atomic_int. 2022-02-10 Jonathan Wakely * src/filesystem/dir-common.h (_GLIBCXX_HAVE_DIRFD): Undefine when is not available. (_GLIBCXX_HAVE_UNLINKAT): Likewise. 2022-02-09 Thomas Rodgers PR libstdc++/104442 * include/bits/atomic_wait.h (__waiter::_M_do_wait_v): Move spin loop inside do loop so that threads failing the wait, reload _M_ver. 2022-02-08 Jonathan Wakely * src/c++17/fs_dir.cc (_Dir(DIR*, const path&)): Change first parameter to _Dir_base&&. * src/filesystem/dir-common.h (_Dir_base(DIR*)): Remove. * src/filesystem/dir.cc (_Dir(DIR*, const path&)): Change first parameter to _Dir_base&&. 2022-02-08 Jonathan Wakely * acinclude.m4 (GLIBCXX_ENABLE_LOCK_POLICY): Add comment about checking for CAS on correct word size. 2022-02-08 Jonathan Wakely * testsuite/experimental/filesystem/operations/create_directories.cc: Adjust expected results for Windows. 2022-02-08 Jonathan Wakely PR libstdc++/104161 * src/c++17/fs_dir.cc (fs::recursive_directory_iterator::__erase): [i_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Refresh entry._M_type member, instead of checking for errno values indicating a directory. * src/c++17/fs_ops.cc (fs::remove_all(const path&)): Use similar logic to non-throwing overload. (fs::remove_all(const path&, error_code&)): Add comments. * src/filesystem/ops-common.h: Likewise. 2022-02-04 Jonathan Wakely * src/filesystem/dir-common.h (_Dir_base::openat): Change return type to use portable posix::DIR alias. 2022-02-04 Jonathan Wakely * include/c_compatibility/stdatomic.h [__clang__]: Use #include_next . 2022-02-04 Jonathan Wakely * include/experimental/bits/fs_ops.h (fs::copy_file): Remove noexcept. (fs::create_directories): Likewise. (fs::remove_all): Likewise. * src/filesystem/ops.cc (fs::copy_file): Remove noexcept. (fs::create_directories): Likewise. (fs::remove_all): Likewise. 2022-02-04 Jonathan Wakely PR libstdc++/104161 * acinclude.m4 (GLIBCXX_CHECK_FILESYSTEM_DEPS): Check for dirfd and unlinkat. * config.h.in: Regenerate. * configure: Regenerate. * include/bits/fs_dir.h (recursive_directory_iterator): Declare remove_all overloads as friends. (recursive_directory_iterator::__erase): Declare new member function. * include/bits/fs_fwd.h (remove, remove_all): Declare. * src/c++17/fs_dir.cc (_Dir): Add filename_only parameter to constructor. Pass file descriptor argument to base constructor. (_Dir::dir_and_pathname, _Dir::open_subdir, _Dir::do_unlink) (_Dir::unlink, _Dir::rmdir): Define new member functions. (directory_iterator): Pass filename_only argument to _Dir constructor. (recursive_directory_iterator::_Dir_stack): Adjust constructor parameters to take a _Dir rvalue instead of creating one. (_Dir_stack::orig): Add data member for storing original path. (_Dir_stack::report_error): Define new member function. (__directory_iterator_nofollow): Move here from dir-common.h and fix value to be a power of two. (__directory_iterator_filename_only): Define new constant. (recursive_directory_iterator): Construct _Dir object and move into _M_dirs stack. Pass skip_permission_denied argument to first advance call. (recursive_directory_iterator::increment): Use _Dir::open_subdir. (recursive_directory_iterator::__erase): Define new member function. * src/c++17/fs_ops.cc (ErrorReporter, do_remove_all): Remove. (fs::remove_all): Use new recursive_directory_iterator::__erase member function. * src/filesystem/dir-common.h (_Dir_base): Add int parameter to constructor and use openat to implement nofollow semantics. (_Dir_base::fdcwd, _Dir_base::set_close_on_exec, _Dir_base::openat): Define new member functions. (__directory_iterator_nofollow): Move to fs_dir.cc. * src/filesystem/dir.cc (_Dir): Pass file descriptor argument to base constructor. (_Dir::dir_and_pathname, _Dir::open_subdir): Define new member functions. (recursive_directory_iterator::_Dir_stack): Adjust constructor parameters to take a _Dir rvalue instead of creating one. (recursive_directory_iterator): Check for new nofollow option. Construct _Dir object and move into _M_dirs stack. Pass skip_permission_denied argument to first advance call. (recursive_directory_iterator::increment): Use _Dir::open_subdir. * src/filesystem/ops.cc (fs::remove_all): Use C++17 remove_all. 2022-02-04 Jonathan Wakely * include/bits/allocator.h: Qualify std::allocator_traits in deprecated warnings. * libsupc++/exception (uncaught_exception): Add suggestion to deprecated warning. 2022-02-02 Jonathan Wakely * src/c++17/fs_dir.cc (fs::recursive_directory_iterator::pop): Add [[maybe_unused]] attribute. * src/filesystem/dir.cc (fs::recursive_directory_iterator::pop): Likewise. 2022-02-02 Jonathan Wakely * testsuite/23_containers/multiset/operators/cmp_c++20.cc: Use custom comparison function for multiset. * testsuite/23_containers/set/operators/cmp_c++20.cc: Use custom comparison function for set. 2022-02-02 Jonathan Wakely * include/bits/boost_concept_check.h (_OutputIteratorConcept): Change member function to data member of function pointer type. 2022-02-02 Martin Sebor PR libstdc++/101831 * include/std/array (begin): Declare const member function attribute const. (end, rbegin, rend, size, max_size, empty, data): Same. * testsuite/23_containers/array/capacity/empty.cc: Add test cases. * testsuite/23_containers/array/capacity/max_size.cc: Same. * testsuite/23_containers/array/capacity/size.cc: Same. * testsuite/23_containers/array/iterators/begin_end.cc: New test. 2022-02-02 Jonathan Wakely * testsuite/27_io/filesystem/iterators/error_reporting.cc: Use autoconf macro to check whether d_type is present. * testsuite/experimental/filesystem/iterators/error_reporting.cc: Likewise. 2022-02-01 Jonathan Wakely * testsuite/27_io/filesystem/iterators/97731.cc: New test. * testsuite/27_io/filesystem/iterators/recursive_directory_iterator.cc: Check follow_directory_symlink option. * testsuite/experimental/filesystem/iterators/recursive_directory_iterator.cc: Likewise. 2022-02-01 Jonathan Wakely * src/c++17/fs_dir.cc (recursive_directory_iterator::increment): Reset state to past-the-end iterator on error. (fs::recursive_directory_iterator::pop(error_code&)): Likewise. (fs::recursive_directory_iterator::pop()): Check _M_dirs before it might get reset. * src/filesystem/dir.cc (recursive_directory_iterator): Likewise, for the TS implementation. * testsuite/27_io/filesystem/iterators/error_reporting.cc: New test. * testsuite/experimental/filesystem/iterators/error_reporting.cc: New test. 2022-02-01 Jonathan Wakely * include/bits/fs_fwd.h (filesystem::perms): Fix comment. 2022-02-01 Jonathan Wakely PR libstdc++/104301 * acinclude.m4 (GLIBCXX_ENABLE_CSTDIO): Print different messages for stdio_pure and stdio_posix options. * configure: Regenerate. 2022-02-01 Thomas Rodgers * include/bits/atomic_wait.h: Change memory order from Acquire/Release with relaxed loads to SeqCst+Release for accesses to the waiter's count. 2022-01-31 Martin Liska * acinclude.m4: Detect *_ld_is_mold and use it. * configure: Regenerate. 2022-01-30 Hans-Peter Nilsson * testsuite/27_io/basic_istream/get/char/lwg3464.cc: Don't run on simulator targets. * testsuite/27_io/basic_istream/get/wchar_t/lwg3464.cc: Likewise. 2022-01-27 Jonathan Wakely PR libstdc++/100516 * include/bits/deque.tcc (_M_range_initialize): Add __builtin_unreachable to loop. * testsuite/23_containers/deque/100516.cc: New test. 2022-01-27 Jonathan Wakely * include/bits/ranges_base.h (ranges::advance): Avoid signed overflow. Do nothing if already equal to desired result. * testsuite/24_iterators/range_operations/advance_overflow.cc: New test. 2022-01-27 Martin Liska PR libstdc++/104259 * acinclude.m4: Fix typo. * configure: Regenerate. 2022-01-25 Jonathan Wakely PR libstdc++/104019 * include/bits/istream.tcc (basic_istream::sentry): Add braces around try-block. * include/bits/shared_ptr_base.h (_Sp_counted_array_base::_M_init): Add pragmas to disable bogus warnings from PR 61596. 2022-01-25 Jonathan Wakely PR libstdc++/104217 * src/c++17/fs_ops.cc (_GNU_SOURCE): Define. * src/filesystem/dir.cc (_GNU_SOURCE): Define. * src/filesystem/ops.cc (_GNU_SOURCE): Define. 2022-01-25 Jonathan Wakely PR libstdc++/104161 * acinclude.m4 (GLIBCXX_CHECK_FILESYSTEM_DEPS): Check for fdopendir. * config.h.in: Regenerate. * configure: Regenerate. * src/c++17/fs_dir.cc (_Dir): Add nofollow flag to constructor and pass it to base class constructor. (directory_iterator): Pass nofollow flag to _Dir constructor. (fs::recursive_directory_iterator::increment): Likewise. * src/c++17/fs_ops.cc (do_remove_all): Use nofollow option for directory_iterator constructor. Move error check outside loop. * src/filesystem/dir-common.h (_Dir_base): Add nofollow flag to constructor and when it's set use ::open with O_NOFOLLOW and O_DIRECTORY. * src/filesystem/dir.cc (_Dir): Add nofollow flag to constructor and pass it to base class constructor. (directory_iterator): Pass nofollow flag to _Dir constructor. (fs::recursive_directory_iterator::increment): Likewise. * src/filesystem/ops.cc (remove_all): Use nofollow option for directory_iterator constructor. Move error check outside loop. 2022-01-23 Jonathan Wakely PR libstdc++/104032 * include/std/spanstream (basic_spanbuf(basic_spanbuf&&)): Use mem-initializer for _M_buf. (basic_spanbuf::Operator=(basic_spanbuf&&)): Fix ill-formed member access. * testsuite/27_io/spanstream/2.cc: New test. 2022-01-23 Jonathan Wakely * src/c++17/floating_from_chars.cc (USE_STRTOD_FOR_FROM_CHARS): Define macro for case where std::from_chars is implemented in terms of strtod, strtof or strtold. (buffer_resource, valid_fmt, find_end_of_float, pattern) (from_chars_impl, make_result, reserve_string): Do not define unless USE_STRTOD_FOR_FROM_CHARS is defined. (from_chars): Define when at least one of USE_LIB_FAST_FLOAT and USE_STRTOD_FOR_FROM_CHARS is defined, instead of _GLIBCXX_HAVE_USELOCALE. Use fast_float for long double when it is binary64. 2022-01-23 Jonathan Wakely PR libstdc++/104174 * include/bits/hashtable_policy.h (_Map_base): Add partial specialization for maps with const key types. * testsuite/23_containers/unordered_map/104174.cc: New test. 2022-01-23 Jonathan Wakely PR libstdc++/104019 * include/bits/shared_ptr_base.h (_Sp_counted_base<>::_M_release): Set members to zero without type punning. 2022-01-21 Jonathan Wakely * testsuite/20_util/shared_ptr/cons/array.cc: Fix comment. 2022-01-21 Jonathan Wakely PR libstdc++/87193 PR libstdc++/104019 * include/bits/alloc_traits.h (__cpp_lib_allocator_traits_is_always_equal): Define as type long. * include/bits/allocator.h (__cpp_lib_incomplete_container_elements): Likewise. * include/bits/basic_string.h (__cpp_lib_string_udls): Likewise. * include/bits/chrono.h (__cpp_lib_chrono): Likewise. (__cpp_lib_chrono_udls): Likewise. * include/bits/move.h (__cpp_lib_addressof_constexpr): Likewise. * include/bits/node_handle.h (__cpp_lib_node_extract): Likewise. * include/bits/range_access.h (__cpp_lib_nonmember_container_access): Likewise. * include/bits/shared_ptr.h (__cpp_lib_enable_shared_from_this): Likewise. * include/bits/stl_algo.h (__cpp_lib_clamp): Likewise. (__cpp_lib_sample): Likewise. * include/bits/stl_algobase.h (__cpp_lib_robust_nonmodifying_seq_ops): Likewise. * include/bits/stl_function.h (__cpp_lib_transparent_operators): Likewise. * include/bits/stl_iterator.h (__cpp_lib_make_reverse_iterator): Likewise. * include/bits/stl_map.h (__cpp_lib_map_try_emplace): Likewise. * include/bits/stl_tree.h (__cpp_lib_generic_associative_lookup): Likewise. * include/bits/unique_ptr.h (__cpp_lib_make_unique): Likewise. * include/bits/unordered_map.h (__cpp_lib_unordered_map_try_emplace): Likewise. * include/c_global/cmath (__cpp_lib_hypot): Likewise. * include/c_global/cstddef (__cpp_lib_byte): Likewise. * include/std/atomic (__cpp_lib_atomic_is_always_lock_free): Likewise. * include/std/complex (__cpp_lib_complex_udls): Likewise. * include/std/filesystem (__cpp_lib_filesystem): Likewise. * include/std/functional (__cpp_lib_not_fn): Likewise. (__cpp_lib_boyer_moore_searcher): Likewise. * include/std/iomanip (__cpp_lib_quoted_string_io): Likewise. * include/std/mutex (__cpp_lib_scoped_lock): Likewise. * include/std/numeric (__cpp_lib_gcd_lcm): Likewise. (__cpp_lib_gcd, __cpp_lib_lcm): Likewise. * include/std/tuple (__cpp_lib_apply): Likewise. (__cpp_lib_make_from_tuple): Likewise. * include/std/type_traits (__cpp_lib_integral_constant_callable) (__cpp_lib_bool_constant, __cpp_lib_logical_traits) (__cpp_lib_is_null_pointer, __cpp_lib_transformation_trait_aliases) (__cpp_lib_result_of_sfinae, __cpp_lib_void_t) (__cpp_lib_is_swappable, __cpp_lib_is_invocable) (__cpp_lib_has_unique_object_representations) (__cpp_lib_is_aggregate): Likewise. * include/std/version: Likewise. * libsupc++/new (__cpp_lib_launder): Likewise. 2022-01-21 Jonathan Wakely * include/std/version (__cpp_lib_shared_ptr_arrays): Fix condition for C++17 definition. 2022-01-21 Jonathan Wakely * include/bits/shared_ptr_atomic.h (_Sp_atomic::_Atomic_count): Add constexpr. (_Sp_atomic::_M_ptr): Add default member-initializer. * testsuite/20_util/shared_ptr/atomic/atomic_shared_ptr.cc: Check constant initialization. * testsuite/20_util/weak_ptr/atomic_weak_ptr.cc: Likewise. 2022-01-20 Jonathan Wakely * src/c++11/cxx11-ios_failure.cc (__constinit): Define as equivalent attribute for Clang. * src/c++11/future.cc (__constinit): Likewise. * src/c++11/system_error.cc (__constinit): Likewise. * src/c++17/memory_resource.cc (__constinit): Likewise. 2022-01-20 Jonathan Wakely * scripts/testsuite_flags.in: Only add src/filesystem/.libs and src/libbacktrace/.libs to LDFLAGS if those directories exist. 2022-01-19 Jonathan Wakely * configure.ac (GLIBCXX_ENABLE_DEBUG_FLAGS): Remove -gdwarf-4 from default flags. * configure: Regenerate. 2022-01-19 Jonathan Wakely PR libstdc++/104123 * testsuite/29_atomics/headers/stdatomic.h/c_compat.cc: Include . 2022-01-19 Jonathan Wakely * scripts/testsuite_flags.in: Add src/libbacktrace/.libs to linker search paths. * src/Makefile.am: Fix src/debug/libbacktrace build. * src/Makefile.in: Regenerate. * src/libbacktrace/Makefile.am: Use per-library CPPFLAGS variable. Use symlinks for the source files. * src/libbacktrace/Makefile.in: Regenerate. 2022-01-19 Matthias Kretz * include/experimental/bits/simd.h (__floating_point_flags): Do not rely on math_errhandling to expand to a constant expression. 2022-01-19 Jonathan Wakely * doc/xml/manual/evolution.xml: Document deprecations. * doc/xml/manual/status_cxx2017.xml: Update status. * doc/html/*: Regenerate. 2022-01-19 Jonathan Wakely * include/bits/stl_tempbuf.h (get_temporary_buffer): Change _GLIBCXX14_DEPRECATED to _GLIBCXX17_DEPRECATED. 2022-01-19 Jonathan Wakely * include/bits/stl_pair.h (_PCC::_DeprConsPair): Remove unused function. 2022-01-19 Jonathan Wakely PR libstdc++/104101 * include/bits/shared_ptr_atomic.h (_Sp_atomic::_Atomic_count::lock): Only use __thread_relax if __cpp_lib_atomic_wait is defined. 2022-01-18 Jonathan Wakely PR libstdc++/104099 * include/bits/basic_string.h (basic_string(nullptr_t)): Only define for C++23. (operator=(nullptr_t)): Likewise. * include/bits/cow_string.h: Likewise. * include/std/string_view (basic_string_view(nullptr_t)): Likewise. * testsuite/21_strings/basic_string/cons/char/nullptr.cc: Adjust expected error. Add examples that become ill-formed in C++23. * testsuite/21_strings/basic_string_view/cons/char/nonnull.cc: Adjust expected errors. * testsuite/21_strings/basic_string_view/cons/wchar_t/nonnull.cc: Likewise. 2022-01-18 Jonathan Wakely PR libstdc++/104098 * include/bits/stl_iterator.h (reverse_iterator): Check __cpp_lib_concepts instead of __cplusplus. 2022-01-18 Jonathan Wakely PR libstdc++/101124 * include/bits/stl_pair.h (pair): Adjust constraints on deprecated constructors accepting literal zero as null pointer constant. Improve wording of deprecated attribute. * testsuite/20_util/pair/cons/99957.cc: Check that deprecated constructors do not cause ambiguities for copyable types. 2022-01-18 Jonathan Wakely * include/bits/stl_function.h (ptr_fun): Fix suggestion for non-deprecated alternative. 2022-01-18 Tom Honermann * acinclude.m4: Define config macros if uchar.h provides c8rtomb() and mbrtoc8(). * config.h.in: Regenerate. * configure: Regenerate. * include/c_compatibility/uchar.h (c8rtomb, mbrtoc8): Define. * include/c_global/cuchar (c8rtomb, mbrtoc8): Likewise. * include/c_std/cuchar (c8rtomb, mbrtoc8): Likewise. * testsuite/21_strings/headers/cuchar/functions_std_cxx20.cc: New test. * testsuite/21_strings/headers/cuchar/functions_std_fchar8_t.cc: New test. 2022-01-18 Jonathan Wakely * include/Makefile.am: Install new header. * include/Makefile.in: Regenerate. * include/c_compatibility/stdatomic.h: New file. * testsuite/29_atomics/headers/stdatomic.h/c_compat.cc: New test. 2022-01-18 Jonathan Wakely PR libstdc++/104080 * src/c++17/fast_float/LOCAL_PATCHES: Update. * src/c++17/fast_float/fast_float.h (FASTFLOAT_IS_BIG_ENDIAN): Define in terms of __BYTE_ORDER__. 2022-01-18 Jonathan Wakely PR libstdc++/104080 * src/c++17/fast_float/LOCAL_PATCHES: UPDATE. * src/c++17/fast_float/fast_float.h (round): Use explicit template argument list for std::min. 2022-01-18 Jonathan Wakely * doc/xml/manual/status_cxx2017.xml: Update C++17 status. * doc/xml/manual/status_cxx2020.xml: Use 12.1 instead of 12 for upcoming release. * doc/html/manual/status.html: Regenerate. 2022-01-18 Jonathan Wakely * acinclude.m4 (GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING): Improve comments. * configure: Regenerate. 2022-01-17 Patrick Palka * src/c++17/floating_from_chars.cc: (USE_LIB_FAST_FLOAT): Conditionally define, and use it to conditionally include fast_float. (from_chars): Use fast_float for float and double when USE_LIB_FAST_FLOAT. 2022-01-17 Patrick Palka * src/c++17/fast_float/LOCAL_PATCHES: Update. * src/c++17/fast_float/fast_float.h (from_chars_advanced): In case of over/underflow, return errc::result_out_of_range and don't modify 'value'. 2022-01-17 Patrick Palka * src/c++17/fast_float/LOCAL_PATCHES: Update. * src/c++17/fast_float/fast_float.h: Apply local modifications. 2022-01-17 Patrick Palka * src/c++17/fast_float/LOCAL_PATCHES: New file. * src/c++17/fast_float/MERGE: New file. * src/c++17/fast_float/README.md: New file, copied from the fast_float repository. * src/c++17/fast_float/fast_float.h: New file, an amalgamation of the fast_float library. 2022-01-17 Patrick Palka * src/c++17/floating_from_chars.cc: Include . (ascii_to_hexit, starts_with_ci): Conditionally define. (__floating_from_chars_hex): Conditionally define. (from_chars): Use __floating_from_chars_hex for chars_format::hex parsing of binary32/64 float/double. (testsuite/20_util/from_chars/7.cc): New test. * testsuite/20_util/from_chars/7.cc: New file. 2022-01-17 Jonathan Wakely * acinclude.m4 (GLIBCXX_ENABLE_BACKTRACE): New macro. * configure.ac: Use GLIBCXX_ENABLE_BACKTRACE. * include/Makefile.am: Add new header. * include/Makefile.in: Regenerate. * include/std/stacktrace: New header. * include/std/version (__cpp_lib_stacktrace): Define. * Makefile.in: Regenerate. * config.h.in: Regenerate. * configure: Regenerate. * doc/Makefile.in: Regenerate. * libsupc++/Makefile.in: Regenerate. * po/Makefile.in: Regenerate. * python/Makefile.in: Regenerate. * src/Makefile.am: Regenerate. * src/Makefile.in: Regenerate. * src/c++11/Makefile.in: Regenerate. * src/c++17/Makefile.in: Regenerate. * src/c++20/Makefile.in: Regenerate. * src/c++98/Makefile.in: Regenerate. * src/filesystem/Makefile.in: Regenerate. * testsuite/Makefile.in: Regenerate. * src/libbacktrace/Makefile.am: New file. * src/libbacktrace/Makefile.in: New file. * src/libbacktrace/backtrace-rename.h: New file. * src/libbacktrace/backtrace-supported.h.in: New file. * src/libbacktrace/config.h.in: New file. * testsuite/lib/libstdc++.exp (check_effective_target_stacktrace): New proc. * testsuite/20_util/stacktrace/entry.cc: New test. * testsuite/20_util/stacktrace/synopsis.cc: New test. * testsuite/20_util/stacktrace/version.cc: New test. 2022-01-17 Jonathan Wakely * doc/xml/manual/status_cxx2020.xml: Use final C++20 option names. * doc/html/manual/status.html: Regenerate. 2022-01-17 Jonathan Wakely PR libstdc++/103650 * include/Makefile.am: Rename LT_OBJDIR and STDC_HEADERS. * include/Makefile.in: Regenerate. * testsuite/17_intro/headers/c++1998/103650.cc: New test. 2022-01-17 Matthias Kretz * include/experimental/bits/simd.h (__floating_point_flags): Do not rely on the presence of the math_errhandling macro. 2022-01-17 Jonathan Wakely * include/bits/shared_ptr_atomic.h (_Sp_atomic): Add typename to qualified-id for dependent type. 2022-01-17 Jonathan Wakely * doc/xml/manual/status_cxx2020.xml: Update. * doc/html/manual/status.html: Regenerate. 2022-01-17 Jonathan Wakely Thomas Rodgers * include/bits/shared_ptr_atomic.h (__cpp_lib_atomic_shared_ptr): New macro. (_Sp_atomic): New class template. (atomic>, atomic>): New partial specializations. * include/bits/shared_ptr_base.h (__shared_count, __weak_count) (__shared_ptr, __weak_ptr): Declare _Sp_atomic as a friend. * include/std/version (__cpp_lib_atomic_shared_ptr): New macro. * testsuite/20_util/shared_ptr/atomic/atomic_shared_ptr.cc: New test. * testsuite/20_util/weak_ptr/atomic_weak_ptr.cc: New test. 2022-01-15 Matthias Kretz * include/experimental/bits/simd.h: Move feature detection bools and add __have_avx512bitalg, __have_avx512vbmi2, __have_avx512vbmi, __have_avx512ifma, __have_avx512cd, __have_avx512vnni, __have_avx512vpopcntdq. (__detail::__machine_flags): New function which returns a unique uint64 depending on relevant -m and -f flags. (__detail::__odr_helper): New type alias for either an anonymous type or a type specialized with the __machine_flags number. (_SimdIntOperators): Change template parameters from _Impl to _Tp, _Abi because _Impl now has an __odr_helper parameter which may be _OdrEnforcer from the anonymous namespace, which makes for a bad base class. (many): Either add __odr_helper template parameter or mark as always_inline. * include/experimental/bits/simd_detail.h: Add defines for AVX512BITALG, AVX512VBMI2, AVX512VBMI, AVX512IFMA, AVX512CD, AVX512VNNI, AVX512VPOPCNTDQ, and AVX512VP2INTERSECT. * include/experimental/bits/simd_builtin.h: Add __odr_helper template parameter or mark as always_inline. * include/experimental/bits/simd_fixed_size.h: Ditto. * include/experimental/bits/simd_math.h: Ditto. * include/experimental/bits/simd_scalar.h: Ditto. * include/experimental/bits/simd_neon.h: Add __odr_helper template parameter. * include/experimental/bits/simd_ppc.h: Ditto. * include/experimental/bits/simd_x86.h: Ditto. 2022-01-14 Uroš Bizjak * testsuite/22_locale/numpunct/members/char/3.cc: Require pt_PT locale instead of nl_NL. (test02): Use pt_PT locale instead of nl_NL. 2022-01-14 Jonathan Wakely PR libstdc++/91260 PR libstdc++/91383 PR libstdc++/95065 * include/backward/binders.h (bind1st, bind2nd): Add deprecated attribute. * include/bits/refwrap.h (_Maybe_unary_or_binary_function): Disable deprecated warnings for base classes. (_Reference_wrapper_base): Likewise. * include/bits/shared_ptr_base.h (_Sp_owner_less): Likewise. * include/bits/stl_bvector.h (_Bit_iterator_base): Likewise. * include/bits/stl_function.h (unary_function, binary_function): Add deprecated attribute. (unary_negate, not1, binary_negate, not2, ptr_fun) (pointer_to_unary_function, pointer_to_binary_function) (mem_fun_t, const_mem_fun_t, mem_fun_ref_t, const_mem_fun_ref_t) (mem_fun1_t, const_mem_fun1_t, mem_fun_ref1_t) (const_mem_fun1_ref_t, mem_fun, mem_fun_ref): Add deprecated attributes. * include/bits/stl_iterator.h: Disable deprecated warnings for std::iterator base classes. * include/bits/stl_iterator_base_types.h (iterator): Add deprecated attribute. * include/bits/stl_map.h (map::value_compare): Disable deprecated warnings for base class. * include/bits/stl_multimap.h (multimap::value_compare): Likewise. * include/bits/stl_raw_storage_iter.h (raw_storage_iterator): Add deprecated attribute. * include/bits/stl_tempbuf.h (get_temporary_buffer): Likewise. * include/bits/stream_iterator.h: Disable deprecated warnings. * include/bits/streambuf_iterator.h: Likewise. * include/ext/bitmap_allocator.h: Remove unary_function base classes. * include/ext/functional: Disable deprecated warnings. * include/ext/rope: Likewise. * include/ext/throw_allocator.h: Likewise. * include/std/type_traits (result_of): Add deprecated attribute. * include/tr1/functional: Disable deprecated warnings. * include/tr1/functional_hash.h: Likewise. * testsuite/20_util/function_objects/binders/1.cc: Add -Wno-disable-deprecations. * testsuite/20_util/function_objects/binders/3113.cc: Likewise. * testsuite/20_util/function_objects/constexpr.cc: Add dg-warning. * testsuite/20_util/raw_storage_iterator/base.cc: Likewise. * testsuite/20_util/raw_storage_iterator/dr2127.cc: Likewise. * testsuite/20_util/raw_storage_iterator/requirements/base_classes.cc: Likewise. * testsuite/20_util/raw_storage_iterator/requirements/explicit_instantiation/1.cc: Likewise. * testsuite/20_util/raw_storage_iterator/requirements/typedefs.cc: Likewise. * testsuite/20_util/reference_wrapper/24803.cc: Likewise. * testsuite/20_util/reference_wrapper/typedefs.cc: Enable for C++20 and check for absence of nested types. * testsuite/20_util/shared_ptr/comparison/less.cc: Remove std::binary_function base class. * testsuite/20_util/temporary_buffer.cc: Add dg-warning. * testsuite/21_strings/basic_string/cons/char/69092.cc: Remove std::iterator base class. * testsuite/24_iterators/back_insert_iterator/requirements/base_classes.cc: Likewise. * testsuite/24_iterators/front_insert_iterator/requirements/base_classes.cc: Likewise. * testsuite/24_iterators/insert_iterator/requirements/base_classes.cc: Likewise. * testsuite/24_iterators/istream_iterator/requirements/base_classes.cc: Likewise. * testsuite/24_iterators/istreambuf_iterator/92285.cc: Likewise. * testsuite/24_iterators/istreambuf_iterator/requirements/base_classes.cc: Likewise. * testsuite/24_iterators/ostream_iterator/requirements/base_classes.cc: Likewise. * testsuite/24_iterators/ostreambuf_iterator/requirements/base_classes.cc: Likewise. * testsuite/24_iterators/reverse_iterator/requirements/base_classes.cc: Likewise. * testsuite/25_algorithms/copy/34595.cc: Likewise. * testsuite/25_algorithms/minmax/3.cc: Remove std::binary_function base class. * testsuite/25_algorithms/all_of/requirements/explicit_instantiation/2.cc: Disable deprecated warnings. * testsuite/25_algorithms/all_of/requirements/explicit_instantiation/pod.cc: Likewise. * testsuite/25_algorithms/any_of/requirements/explicit_instantiation/2.cc: Likewise. * testsuite/25_algorithms/any_of/requirements/explicit_instantiation/pod.cc: Likewise. * testsuite/25_algorithms/copy_if/requirements/explicit_instantiation/2.cc: Likewise. * testsuite/25_algorithms/copy_if/requirements/explicit_instantiation/pod.cc: Likewise. * testsuite/25_algorithms/count_if/requirements/explicit_instantiation/2.cc: Likewise. * testsuite/25_algorithms/count_if/requirements/explicit_instantiation/pod.cc: Likewise. * testsuite/25_algorithms/find_end/requirements/explicit_instantiation/2.cc: Likewise. * testsuite/25_algorithms/find_end/requirements/explicit_instantiation/pod.cc: Likewise. * testsuite/25_algorithms/find_first_of/requirements/explicit_instantiation/2.cc: Likewise. * testsuite/25_algorithms/find_first_of/requirements/explicit_instantiation/pod.cc: Likewise. * testsuite/25_algorithms/find_if/requirements/explicit_instantiation/2.cc: Likewise. * testsuite/25_algorithms/find_if/requirements/explicit_instantiation/pod.cc: Likewise. * testsuite/25_algorithms/find_if_not/requirements/explicit_instantiation/2.cc: Likewise. * testsuite/25_algorithms/find_if_not/requirements/explicit_instantiation/pod.cc: Likewise. * testsuite/25_algorithms/for_each/requirements/explicit_instantiation/2.cc: Likewise. * testsuite/25_algorithms/for_each/requirements/explicit_instantiation/pod.cc: Likewise. * testsuite/25_algorithms/is_partitioned/requirements/explicit_instantiation/2.cc: Likewise. * testsuite/25_algorithms/is_partitioned/requirements/explicit_instantiation/pod.cc: Likewise. * testsuite/25_algorithms/is_permutation/requirements/explicit_instantiation/2.cc: Likewise. * testsuite/25_algorithms/is_permutation/requirements/explicit_instantiation/pod.cc: Likewise. * testsuite/25_algorithms/none_of/requirements/explicit_instantiation/2.cc: Likewise. * testsuite/25_algorithms/none_of/requirements/explicit_instantiation/pod.cc: Likewise. * testsuite/25_algorithms/partition/requirements/explicit_instantiation/2.cc: Likewise. * testsuite/25_algorithms/partition/requirements/explicit_instantiation/pod.cc: Likewise. * testsuite/25_algorithms/partition_copy/requirements/explicit_instantiation/2.cc: Likewise. * testsuite/25_algorithms/partition_copy/requirements/explicit_instantiation/pod.cc: Likewise. * testsuite/25_algorithms/partition_point/requirements/explicit_instantiation/2.cc: Likewise. * testsuite/25_algorithms/partition_point/requirements/explicit_instantiation/pod.cc: Likewise. * testsuite/25_algorithms/random_shuffle/requirements/explicit_instantiation/2.cc: Likewise. * testsuite/25_algorithms/random_shuffle/requirements/explicit_instantiation/pod.cc: Likewise. * testsuite/25_algorithms/remove_copy_if/requirements/explicit_instantiation/2.cc: Likewise. * testsuite/25_algorithms/remove_copy_if/requirements/explicit_instantiation/pod.cc: Likewise. * testsuite/25_algorithms/remove_if/requirements/explicit_instantiation/2.cc: Likewise. * testsuite/25_algorithms/remove_if/requirements/explicit_instantiation/pod.cc: Likewise. * testsuite/25_algorithms/replace_copy_if/requirements/explicit_instantiation/2.cc: Likewise. * testsuite/25_algorithms/replace_copy_if/requirements/explicit_instantiation/pod.cc: Likewise. * testsuite/25_algorithms/replace_if/requirements/explicit_instantiation/2.cc: Likewise. * testsuite/25_algorithms/replace_if/requirements/explicit_instantiation/pod.cc: Likewise. * testsuite/25_algorithms/search/requirements/explicit_instantiation/2.cc: Likewise. * testsuite/25_algorithms/search/requirements/explicit_instantiation/pod.cc: Likewise. * testsuite/25_algorithms/search_n/requirements/explicit_instantiation/2.cc: Likewise. * testsuite/25_algorithms/search_n/requirements/explicit_instantiation/pod.cc: Likewise. * testsuite/25_algorithms/stable_partition/requirements/explicit_instantiation/2.cc: Likewise. * testsuite/25_algorithms/stable_partition/requirements/explicit_instantiation/pod.cc: Likewise. * testsuite/25_algorithms/transform/requirements/explicit_instantiation/2.cc: Likewise. * testsuite/25_algorithms/transform/requirements/explicit_instantiation/pod.cc: Likewise. * testsuite/27_io/basic_filebuf/underflow/wchar_t/9178.cc: Add dg-warning. * testsuite/ext/pb_ds/example/priority_queue_erase_if.cc: Likewise. * testsuite/ext/pb_ds/example/priority_queue_split_join.cc: Likewise. * testsuite/tr1/3_function_objects/reference_wrapper/typedefs.cc: Disable deprecated warnings. * testsuite/tr1/6_containers/hash/requirements/base_classes.cc: Likewise. * testsuite/util/regression/trait/erase_if_fn.hpp: Remove std::unary_function base classes. * testsuite/util/testsuite_iterators.h (output_iterator_wrapper): Remove std::iterator base classes. 2022-01-14 Jonathan Wakely * include/bits/shared_ptr.h (__cpp_lib_shared_ptr_weak_type): Correct type of macro value. (shared_ptr): Add additional friend declarations. (make_shared, allocate_shared): Constrain existing overloads and remove static_assert. * include/bits/shared_ptr_base.h (__cpp_lib_smart_ptr_for_overwrite): New macro. (_Sp_counted_ptr_inplace): New partial specialization for use with make_shared_for_overwrite. (__cpp_lib_shared_ptr_arrays): Update value for C++20. (_Sp_counted_array_base): New class template. (_Sp_counted_array): New class template. (__shared_count(_Tp*&, const _Sp_counted_array_base&, _Init)): New constructor for allocating shared arrays. (__shared_ptr(const _Sp_counted_array_base&, _Init)): Likewise. * include/std/version (__cpp_lib_shared_ptr_weak_type): Correct type. (__cpp_lib_shared_ptr_arrays): Update value for C++20. (__cpp_lib_smart_ptr_for_overwrite): New macro. * testsuite/20_util/shared_ptr/creation/99006.cc: Adjust expected errors. * testsuite/20_util/shared_ptr/creation/array.cc: New test. * testsuite/20_util/shared_ptr/creation/overwrite.cc: New test. * testsuite/20_util/shared_ptr/creation/version.cc: New test. * testsuite/20_util/unique_ptr/creation/for_overwrite.cc: Check feature test macro. Test non-trivial default-initialization. 2022-01-14 Jonathan Wakely * include/bits/stl_construct.h (_Construct, _Construct_novalue): Also cast away cv-qualifiers when converting pointer to void. * testsuite/20_util/allocator/void.cc: Test construct function with cv-qualified types. 2022-01-14 Jonathan Wakely PR libstdc++/103992 * include/bits/stl_iterator.h (common_iterator): Use std::construct_at instead of placement new. * testsuite/24_iterators/common_iterator/1.cc: Check copy construction is usable in constant expressions. 2022-01-14 Jonathan Wakely * doc/xml/manual/status_cxx2011.xml: Document new tokens accepted by std::random_device constructor. * doc/html/manual/status.html: Regenerate. 2022-01-12 Patrick Palka * testsuite/20_util/to_chars/103955.cc: Add explicit dg-do directive. 2022-01-12 Patrick Palka PR libstdc++/103955 * src/c++17/floating_to_chars.cc (__floating_to_chars_hex): Track the excess precision separately from the effective precision. Avoid overflow in bounds check by splitting it into two checks. (__floating_to_chars_precision): Avoid overflow in bounds checks similarly. * testsuite/20_util/to_chars/103955.cc: New test. 2022-01-11 Jonathan Wakely PR libstdc++/103726 * include/Makefile.am: Install for freestanding. * include/Makefile.in: Regenerate. * include/std/version (__cpp_lib_source_location): Define for freestanding. 2022-01-11 Jonathan Wakely * include/std/ranges (ranges::lazy_split_view::_InnerIter::end()): Add neoxcept (LWG 3593). 2022-01-11 Jonathan Wakely * include/std/ranges (ranges::__detail::__box): Add constexpr to assignment operators (LWG 3572). * testsuite/std/ranges/adaptors/filter.cc: Check assignment of a view that uses copyable-box. 2022-01-11 Jonathan Wakely PR libstdc++/103726 * include/Makefile.am: Install for freestanding. * include/Makefile.in: Regenerate. * include/std/coroutine: Adjust headers and preprocessor conditions. (__coroutine_traits_impl): Use concepts when available. [_GLIBCXX_HOSTED] (hash): Define. 2022-01-11 Jonathan Wakely * include/std/ostream (operator<<(basic_ostream&, charT)): Use unformatted input if no padding is needed. (operator<<(basic_ostream&, char)): Likewise. 2022-01-11 Jonathan Wakely PR libstdc++/103891 * include/bits/c++config (_GLIBCXX_HAVE_COND_TRIVIAL_SPECIAL_MEMBERS): Define. * include/std/variant (__cpp_lib_variant): Only define C++20 value when the compiler is known to support conditionally trivial destructors. * include/std/version (__cpp_lib_variant): Likewise. 2022-01-11 Jonathan Wakely * include/bits/stl_iterator.h (common_iterator): Add constexpr to all member functions (LWG 3574). * testsuite/24_iterators/common_iterator/1.cc: Evaluate some tests as constant expressions. * testsuite/24_iterators/common_iterator/2.cc: Likewise. 2022-01-10 Jakub Jelinek PR libstdc++/77760 * include/bits/locale_facets_nonio.h (__time_get_state): New struct. (time_get::_M_extract_via_format): Declare new method with __time_get_state& as an extra argument. * include/bits/locale_facets_nonio.tcc (_M_extract_via_format): Add __state argument, set various fields in it while parsing. Handle %j, %U, %w and %W, fix up handling of %y, %Y and %C, don't adjust tm_hour for %p immediately. Add a wrapper around the method without the __state argument for backwards compatibility. (_M_extract_num): Remove all __len == 4 special cases. (time_get::do_get_time, time_get::do_get_date, time_get::do_get): Zero initialize __state, pass it to _M_extract_via_format and finalize it at the end. (do_get_year): For 1-2 digit parsed years, map 0-68 to 2000-2068, 69-99 to 1969-1999. For 3-4 digit parsed years use that as year. (get): If do_get isn't overloaded from the locale_facets_nonio.tcc version, don't call do_get but call _M_extract_via_format instead to pass around state. * config/abi/pre/gnu.ver (GLIBCXX_3.4.30): Export _M_extract_via_format with extra __time_get_state and __time_get_state::_M_finalize_state. * src/c++98/locale_facets.cc (is_leap, day_of_the_week, day_of_the_year): New functions in anon namespace. (mon_yday): New var in anon namespace. (__time_get_state::_M_finalize_state): Define. * testsuite/22_locale/time_get/get/char/4.cc: New test. * testsuite/22_locale/time_get/get/wchar_t/4.cc: New test. * testsuite/22_locale/time_get/get_year/char/1.cc (test01): Parse 197 as year 197AD instead of error. * testsuite/22_locale/time_get/get_year/char/5.cc (test01): Parse 1 as year 2001 instead of error. * testsuite/22_locale/time_get/get_year/char/6.cc: New test. * testsuite/22_locale/time_get/get_year/wchar_t/1.cc (test01): Parse 197 as year 197AD instead of error. * testsuite/22_locale/time_get/get_year/wchar_t/5.cc (test01): Parse 1 as year 2001 instead of error. * testsuite/22_locale/time_get/get_year/wchar_t/6.cc: New test. 2022-01-10 Jonathan Wakely PR libstdc++/103866 * acinclude.m4 (GLIBCXX_COMPUTE_STDIO_INTEGER_CONSTANTS): Do nothing for freestanding builds. (GLIBCXX_ENABLE_HOSTED): Define FREESTANDING_FLAGS. * configure.ac: Do not use AC_LIBTOOL_DLOPEN when configured with --without-headers. Do not use GCC_HEADER_STDINT for freestanding builds. * libsupc++/Makefile.am (HOSTED_CXXFLAGS): Use -ffreestanding for freestanding builds. * configure: Regenerate. * Makefile.in: Regenerate. * doc/Makefile.in: Regenerate. * include/Makefile.in: Regenerate. * libsupc++/Makefile.in: Regenerate. * po/Makefile.in: Regenerate. * python/Makefile.in: Regenerate. * src/Makefile.in: Regenerate. * src/c++11/Makefile.in: Regenerate. * src/c++17/Makefile.in: Regenerate. * src/c++20/Makefile.in: Regenerate. * src/c++98/Makefile.in: Regenerate. * src/filesystem/Makefile.in: Regenerate. * testsuite/Makefile.in: Regenerate. 2022-01-10 Jonathan Wakely * testsuite/28_regex/algorithms/regex_replace/char/103664.cc: Add dg-timeout-factor directive. * testsuite/28_regex/basic_regex/84110.cc: Likewise. * testsuite/28_regex/basic_regex/ctors/char/other.cc: Likewise. * testsuite/28_regex/match_results/102667.cc: Likewise. 2022-01-10 Jonathan Wakely * doc/xml/manual/using.xml: Update documentation around default -std option. * doc/html/*: Regenerate. 2022-01-10 Jonathan Wakely PR libstdc++/100017 * src/c++17/Makefile.am (AM_CXXFLAGS): Add -nostdinc++. * src/c++17/Makefile.in: Regenerate. 2022-01-09 Sandra Loosemore * testsuite/18_support/type_info/constexpr.cc: Add explicit -fdelete-null-pointer-checks option. 2022-01-06 Pavel I. Kryukov Jonathan Wakely PR libstdc++/103853 * include/bits/forward_list.tcc (forward_list::merge): Check for self-merge. * testsuite/23_containers/forward_list/operations/merge.cc: New test. 2022-01-06 Jonathan Wakely * include/bits/regex.h (basic_regex, match_results): Qualify name in friend declaration, to work around Clang bug. 2022-01-06 Jonathan Wakely * testsuite/ext/rope/pthread7-rope.cc: Add dg-timeout-factor. 2022-01-06 Jonathan Wakely PR libstdc++/103911 * include/std/charconv (__from_chars_alpha_to_num): Return char instead of unsigned char. Change invalid return value to 127 instead of using numeric trait. (__from_chars_alnum): Fix comment. Do not use std::isdigit. Change type of variable to char. 2022-01-05 François Dumont PR libstdc++/68303 * include/bits/hashtable_policy.h (_Hashtable_hash_traits<_Hash>): New. (_Hash_code_base<>::_M_hash_code(const _Hash_node_value<>&)): New. (_Hashtable_base<>::_M_key_equals): New. (_Hashtable_base<>::_M_equals): Use latter. (_Hashtable_base<>::_M_key_equals_tr): New. (_Hashtable_base<>::_M_equals_tr): Use latter. * include/bits/hashtable.h (_Hashtable<>::__small_size_threshold()): New, use _Hashtable_hash_traits. (_Hashtable<>::find): Loop through elements to look for key if size is lower than __small_size_threshold(). (_Hashtable<>::_M_emplace(true_type, _Args&&...)): Likewise. (_Hashtable<>::_M_insert_unique(_Kt&&, _Args&&, const _NodeGenerator&)): Likewise. (_Hashtable<>::_M_compute_hash_code(const_iterator, const key_type&)): New. (_Hashtable<>::_M_emplace(const_iterator, false_type, _Args&&...)): Use latter. (_Hashtable<>::_M_find_before_node(const key_type&)): New. (_Hashtable<>::_M_erase(true_type, const key_type&)): Use latter. (_Hashtable<>::_M_erase(false_type, const key_type&)): Likewise. * src/c++11/hashtable_c++0x.cc: Include . * testsuite/util/testsuite_performance.h (report_performance): Use 9 width to display memory. * testsuite/performance/23_containers/insert_erase/unordered_small_size.cc: New performance test case. 2022-01-05 Jonathan Wakely PR libstdc++/103919 * include/bits/basic_string.h (basic_string(const T&, size_t, size_t)): Relax constraints on string_view parameter. * include/bits/cow_string.h (basic_string(const T&, size_t, size_t)): Likewise. * testsuite/21_strings/basic_string/cons/char/103919.cc: New test. 2022-01-05 Jonathan Wakely * config/abi/pre/gnu.ver (GLIBCXX_3.4.30): Export new symbol for ARM EABI. * include/bits/c++config (_GLIBCXX23_CONSTEXPR): Define. * include/std/version (__cpp_lib_constexpr_typeinfo): Define. * libsupc++/tinfo.cc: Add #error to ensure non-inline definition is emitted. (type_info::__equal): Define alias symbol. * libsupc++/typeinfo (type_info::before): Combine different implementations into one. (type_info::operator==): Likewise. Use address equality for constant evaluation. Call __equal for targets that require the definition to be non-inline. * testsuite/18_support/type_info/constexpr.cc: New test. 2022-01-05 Jonathan Wakely * src/c++11/cxx11-ios_failure.cc (io_error_category): Define class and virtual functions as 'final'. (io_category_instance): Use constinit union to make the object immortal. * src/c++11/future.cc (future_error_category): Define class and virtual functions as 'final'. (future_category_instance): Use constinit union. 2022-01-05 Jonathan Wakely * python/libstdcxx/v6/printers.py (StdErrorCodePrinter): Strip versioned namespace from the type name that is printed. 2022-01-05 Jonathan Wakely * python/libstdcxx/v6/printers.py (StdRegexStatePrinter): New printer for std::regex NFA states. 2022-01-05 Jonathan Wakely * testsuite/23_containers/forward_list/operations/1.cc: Fill in placeholders in comments. * testsuite/23_containers/forward_list/operations/2.cc: Likewise. * testsuite/23_containers/forward_list/operations/3.cc: Likewise. * testsuite/23_containers/forward_list/operations/4.cc: Likewise. * testsuite/23_containers/forward_list/operations/5.cc: Likewise. * testsuite/23_containers/forward_list/operations/6.cc: Likewise. * testsuite/23_containers/forward_list/operations/7.cc: Likewise. 2022-01-05 Jonathan Wakely PR libstdc++/103848 * include/bits/stl_deque.h (operator-): Do not use 0 as null pointer constant. 2022-01-05 Jonathan Wakely * include/bits/alloc_traits.h (allocator_traits>): Use std::_Construct for construct. 2022-01-05 Jonathan Wakely PR libstdc++/103877 * doc/xml/faq.xml: Add '-x c++' to preprocessor command. * doc/html/faq.html: Regenerate. 2022-01-05 Jonathan Wakely * include/bits/regex.h (__regex_algo_impl): Change __policy and __match_mode template parameters to be function parameters. (regex_match, regex_search): Pass policy and match mode as function arguments. * include/bits/regex.tcc (__regex_algo_impl): Change template parameters to function parameters. * include/bits/regex_compiler.h (_RegexTranslatorBase): Use 'if constexpr' for conditions using template parameters. (_RegexTranslator): Likewise. * include/bits/regex_executor.tcc (_Executor::_M_handle_accept): Likewise. * testsuite/util/testsuite_regex.h (regex_match_debug) (regex_search_debug): Move template arguments to function arguments. 2022-01-05 Jonathan Wakely * testsuite/util/testsuite_regex.h (regex_match_debug): Compare results even if the match failed. 2022-01-05 Jonathan Wakely * include/bits/regex_compiler.tcc: Adjust all calls to __throw_regex_error. * include/bits/regex_error.h (__throw_regex_error): Add noreturn attribute. * include/bits/regex_scanner.tcc: Likewise. * src/c++11/regex.cc (desc): New helper function. (regex_error::regex_error(error_type)): Use desc to get a string corresponding to the error code. Copyright (C) 2022 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.