libstdc++-v3/ChangeLog

   1 2021-10-19  Patrick Palka  <ppalka@redhat.com>
   2
   3         * include/std/ranges (iota_view::_Iterator::operator+): Adjust
   4         definition as per LWG 3580.
   5         (iota_view::_Iterator::operator-): Likewise.
   6
   7 2021-10-19  Patrick Palka  <ppalka@redhat.com>
   8
   9         * include/std/ranges (basic_istream_view::_M_object): Value
  10         initialize as per LWG 3568.
  11
  12 2021-10-19  Patrick Palka  <ppalka@redhat.com>
  13
  14         * include/bits/ranges_util.h
  15         (__detail::__uses_nonqualification_pointer_conversion): Define
  16         and use it ...
  17         (__detail::__convertible_to_nonslicing): ... here, as per LWG 3470.
  18         * testsuite/std/ranges/subrange/1.cc: New test.
  19
  20 2021-10-19  Patrick Palka  <ppalka@redhat.com>
  21
  22         * include/std/ranges (iota_view::_Iterator): Befriend iota_view.
  23         (iota_view::_Sentinel): Likewise.
  24         (iota_view::iota_view): Add three overloads, each taking an
  25         iterator/sentinel pair as per LWG 3523.
  26         * testsuite/std/ranges/iota/iota_view.cc (test06): New test.
  27
  28 2021-10-19  Patrick Palka  <ppalka@redhat.com>
  29
  30         * include/bits/ranges_base.h (view_interface): Forward declare.
  31         (__detail::__is_derived_from_view_interface_fn): Declare.
  32         (__detail::__is_derived_from_view_interface): Define as per LWG 3549.
  33         (enable_view): Adjust as per LWG 3549.
  34         * include/bits/ranges_util.h (view_interface): Don't derive from
  35         view_base.
  36         * include/std/ranges (filter_view): Revert r11-3504 change.
  37         (transform_view): Likewise.
  38         (take_view): Likewise.
  39         (take_while_view): Likewise.
  40         (drop_view): Likewise.
  41         (drop_while_view): Likewise.
  42         (join_view): Likewise.
  43         (lazy_split_view): Likewise.
  44         (split_view): Likewise.
  45         (reverse_view): Likewise.
  46         * testsuite/std/ranges/adaptors/sizeof.cc: Update expected sizes.
  47         * testsuite/std/ranges/view.cc (test_view::test_view): Remove
  48         this default ctor since views no longer need to be default initable.
  49         (test01): New test.
  50
  51 2021-10-19  Jonathan Wakely  <jwakely@redhat.com>
  52
  53         * src/c++11/random.cc (which_source): New helper function.
  54         (random_device::_M_getentropy()): Use which_source and return
  55         suitable values for sources other than device files.
  56         * testsuite/26_numerics/random/random_device/entropy.cc: New test.
  57
  58 2021-10-19  Jonathan Wakely  <jwakely@redhat.com>
  59
  60         * doc/Makefile.am (stamp-html-doxygen, stamp-html-doxygen)
  61         (stamp-latex-doxygen, stamp-man-doxygen): Fix recipes for
  62         relative ${top_srcdir}.
  63         * doc/Makefile.in: Regenerate.
  64
  65 2021-10-19  Jonathan Wakely  <jwakely@redhat.com>
  66
  67         * include/std/variant (_Uninitialized): Use an empty struct
  68         for the unused union member, instead of char.
  69
  70 2021-10-19  Jonathan Wakely  <jwakely@redhat.com>
  71
  72         * include/bits/stl_stack.h (stack(Iterator, Iterator)): Remove
  73         non-deducible template parameter from deduction guide.
  74         * testsuite/23_containers/stack/deduction.cc: Check new C++23
  75         deduction guides.
  76
  77 2021-10-19  Jonathan Wakely  <jwakely@redhat.com>
  78
  79         * include/std/optional (_Optional_payload_base::_Storage): Add
  80         constructor taking a callable function to invoke.
  81         (_Optional_payload_base::_M_apply): New function.
  82         (__cpp_lib_monadic_optional): Define for C++23.
  83         (optional::and_then, optional::transform, optional::or_else):
  84         Define for C++23.
  85         * include/std/ranges (__detail::__cached): Remove.
  86         (__detail::__non_propagating_cache): Remove use of __cached for
  87         contained value. Use _Optional_payload_base::_M_construct and
  88         _Optional_payload_base::_M_apply to set the contained value.
  89         * include/std/version (__cpp_lib_monadic_optional): Define.
  90         * testsuite/20_util/optional/monadic/and_then.cc: New test.
  91         * testsuite/20_util/optional/monadic/or_else.cc: New test.
  92         * testsuite/20_util/optional/monadic/or_else_neg.cc: New test.
  93         * testsuite/20_util/optional/monadic/transform.cc: New test.
  94         * testsuite/20_util/optional/monadic/version.cc: New test.
  95
  96 2021-10-19  Jonathan Wakely  <jwakely@redhat.com>
  97
  98         PR libstdc++/102825
  99         * include/bits/mofunc_impl.h (move_only_function): Remove
 100         invalid base initializer.
 101         * testsuite/20_util/move_only_function/cons.cc: Instantiate
 102         constructors to check bodies.
 103
 104 2021-10-15  Jonathan Wakely  <jwakely@redhat.com>
 105
 106         * include/bits/fs_path.h (path::_S_convert(T)): Avoid recursive
 107         call to function with deduced return type.
 108
 109 2021-10-15  Jonathan Wakely  <jwakely@redhat.com>
 110
 111         * include/bits/basic_string.h (__cpp_lib_string_resize_and_overwrite):
 112         Define for C++23.
 113         (basic_string::resize_and_overwrite): Declare.
 114         * include/bits/basic_string.tcc (basic_string::resize_and_overwrite):
 115         Define.
 116         * include/std/version (__cpp_lib_resize_and_overwrite): Define
 117         for C++23.
 118         * testsuite/21_strings/basic_string/capacity/char/resize_and_overwrite.cc:
 119         New test.
 120
 121 2021-10-15  Jonathan Wakely  <jwakely@redhat.com>
 122
 123         PR libstdc++/101263
 124         * include/std/ranges (__cached): New wrapper struct.
 125         (__non_propagating_cache): Use __cached for contained value.
 126         (__non_propagating_cache::_M_emplace_deref): Add constexpr. Use
 127         std::construct_at instead of placement new.
 128         * testsuite/std/ranges/adaptors/join.cc: Check constexpr works.
 129
 130 2021-10-15  Jonathan Wakely  <jwakely@redhat.com>
 131
 132         * include/std/variant (__cpp_lib_variant): Update value for
 133         C++20.
 134         (__variant_cast, __variant_construct): Add constexpr for C++20.
 135         (__variant_construct_single, __construct_by_index) Likewise. Use
 136         std::_Construct instead of placement new.
 137         (_Uninitialized<T, false>) [__cplusplus >= 202002]: Replace
 138         buffer with a union and define a destructor.
 139         (_Variadic_union) [__cplusplus >= 202002]: Add a specialization
 140         for non-trivial destruction.
 141         (_Variant_storage::__index_of): New helper variable template.
 142         (_Variant_storage::~_Variant_storage()): Add constexpr.
 143         (_Variant_storage::_M_reset()): Likewise.
 144         (_Copy_ctor_base, _Move_ctor_base): Likewise.
 145         (_Copy_assign_base, _Move_assign_base): Likewise.
 146         (variant, swap): Likewise.
 147         * include/std/version (__cpp_lib_variant): Update value for
 148         C++20.
 149         * testsuite/20_util/optional/version.cc: Check for exact value
 150         in C++17.
 151         * testsuite/20_util/variant/87619.cc: Increase timeout for
 152         C++20 mode.
 153         * testsuite/20_util/variant/constexpr.cc: New test.
 154         * testsuite/20_util/variant/version.cc: New test.
 155
 156 2021-10-15  Jonathan Wakely  <jwakely@redhat.com>
 157
 158         * include/std/variant (__detail::__variant::__get_storage):
 159         Remove unused function.
 160         (__variant_construct_by_index): Set index after construction is
 161         complete. Rename to ...
 162         (__detail::__variant::__construct_by_index): ... this.
 163         (variant): Use new name for __variant_construct_by_index friend
 164         declaration. Remove __get_storage friend declaration.
 165         (variant::emplace): Use new name and remove try-blocks.
 166
 167 2021-10-15  Jonathan Wakely  <jwakely@redhat.com>
 168
 169         * include/std/variant (_Variant_storage::_M_storage()): Remove.
 170         (__detail::__variant::__get_storage): Remove.
 171         (variant): Remove friend declaration of __get_storage.
 172
 173 2021-10-15  Jason Merrill  <jason@redhat.com>
 174
 175         * testsuite/20_util/integer_comparisons/greater_equal_neg.cc:
 176         * testsuite/20_util/integer_comparisons/greater_neg.cc:
 177         * testsuite/20_util/integer_comparisons/less_equal_neg.cc:
 178         Adjust expected message.
 179         * testsuite/lib/prune.exp: Prune 'in constexpr expansion'.
 180
 181 2021-10-14  Jonathan Wakely  <jwakely@redhat.com>
 182
 183         * include/std/variant (__variant::__get(in_place_index_t<N>, U&&)):
 184         Rename to __get_n and remove first argument. Replace pair of
 185         overloads with a single function using 'if constexpr'.
 186         (__variant::__get(Variant&&)): Adjust to use __get_n.
 187
 188 2021-10-14  Jonathan Wakely  <jwakely@redhat.com>
 189
 190         * include/bits/fs_path.h (path(path&&)): Make unconditionally
 191         noexcept.
 192         (path::_S_convert(T)): Add condtional noexcept.
 193
 194 2021-10-14  Jonathan Wakely  <jwakely@redhat.com>
 195
 196         PR libstdc++/102743
 197         * include/bits/fs_path.h (path::_S_convert(T)): Fix condition
 198         for returning the same string unchanged.
 199
 200 2021-10-14  Jonathan Wakely  <jwakely@redhat.com>
 201
 202         * include/bits/regex.h: Check __cpp_inline_variables instead of
 203         __cplusplus.
 204
 205 2021-10-14  Jonathan Wakely  <jwakely@redhat.com>
 206
 207         * testsuite/20_util/is_layout_compatible/version.cc: Check
 208         correct macro.
 209
 210 2021-10-14  Jonathan Wakely  <jwakely@redhat.com>
 211
 212         * include/bits/stl_construct.h (_Construct): Use
 213         std::construct_at when constant evaluated.
 214         * include/std/optional (_Storage, _Optional_payload, optional):
 215         Add constexpr as specified by P2231R1.
 216         * include/std/version (__cpp_lib_optional): Update value for
 217         C++20.
 218         * testsuite/20_util/optional/requirements.cc: Check feature test
 219         macro.
 220         * testsuite/20_util/optional/constexpr/assign.cc: New test.
 221         * testsuite/20_util/optional/constexpr/cons/conv.cc: New test.
 222         * testsuite/20_util/optional/constexpr/modifiers.cc: New test.
 223         * testsuite/20_util/optional/constexpr/swap.cc: New test.
 224         * testsuite/20_util/optional/version.cc: New test.
 225
 226 2021-10-13  Jonathan Wakely  <jwakely@redhat.com>
 227
 228         * include/bits/fs_path.h (__detail::__is_contiguous): Add
 229         partial specializations for pointers and __normal_iterator.
 230
 231 2021-10-13  Jonathan Wakely  <jwakely@redhat.com>
 232
 233         * testsuite/27_io/filesystem/path/construct/102592.C: Moved to...
 234         * testsuite/27_io/filesystem/path/construct/102592.cc: ...here.
 235         * testsuite/28_regex/match_results/102667.C: Moved to...
 236         * testsuite/28_regex/match_results/102667.cc: ...here.
 237
 238 2021-10-13  Jonathan Wakely  <jwakely@redhat.com>
 239
 240         * include/bits/fs_path.h (__detail::__is_contiguous): New
 241         variable template to identify contiguous iterators.
 242         (__detail::__unified_char8_t): New alias template to decide when
 243         to treat char8_t as char without encoding conversion.
 244         (__detail::__effective_range(const basic_string<C,T>&)): Use
 245         std::char_traits<C> for returned string view.
 246         (__detail::__effective_range(const basic_string_view<C,T>&)):
 247         Likewise.
 248         (__detail::__effective_range(const Source&)): Use
 249         __is_contiguous to detect mode cases of contiguous iterators.
 250         Use __unified_char8_t to return a std::string instead of
 251         std::u8string.
 252
 253 2021-10-13  Jonathan Wakely  <jwakely@redhat.com>
 254
 255         PR libstdc++/102592
 256         * include/bits/fs_path.h (path::path(Iter, Iter, format))
 257         (path::append(Iter, Iter), path::concat(Iter, Iter)): Call
 258         __string_from_range directly, instead of two-argument overload
 259         of _S_convert.
 260         (path::_S_convert(Iter, Iter)): Remove.
 261         * testsuite/27_io/filesystem/path/construct/102592.C: New test.
 262
 263 2021-10-13  Jonathan Wakely  <jwakely@redhat.com>
 264
 265         * include/bits/c++config (__terminate): Add extern "C++".
 266
 267 2021-10-12  Jonathan Wakely  <jwakely@redhat.com>
 268
 269         * testsuite/20_util/tuple/comparison_operators/overloaded.cc:
 270         Restore test for operator<.
 271         * testsuite/20_util/tuple/comparison_operators/overloaded2.cc:
 272         Adjust expected errors for C++20.
 273
 274 2021-10-12  Jonathan Wakely  <jwakely@redhat.com>
 275
 276         PR libstdc++/101960
 277         * include/std/tuple (_Tuple_impl(_Tuple_impl&&)): Define as
 278         defauled.
 279         * testsuite/20_util/tuple/cons/101960.cc: Check tuples with
 280         array elements before the last element.
 281
 282 2021-10-12  Jonathan Wakely  <jwakely@redhat.com>
 283
 284         * include/bits/stl_iterator_base_funcs.h (__advance): Add
 285         deleted overload to improve diagnostics.
 286         (__distance): Likewise.
 287
 288 2021-10-11  Jonathan Wakely  <jwakely@redhat.com>
 289
 290         * include/bits/atomic_timed_wait.h: Remove unused header.
 291         * include/bits/c++config (std:__terminate): Define.
 292         * include/bits/semaphore_base.h: Remove <exception> and use
 293         __terminate instead of terminate.
 294         * include/bits/std_thread.h: Likewise.
 295         * libsupc++/eh_terminate.cc (std::terminate): Use qualified-id
 296         to call __cxxabiv1::__terminate.
 297
 298 2021-10-11  Jonathan Wakely  <jwakely@redhat.com>
 299
 300         * include/bits/regex.h (basic_regex::assign(Iter, Iter)): Avoid
 301         std::__to_address by using poitner directly or using base()
 302         member of __normal_iterator.
 303
 304 2021-10-11  Jonathan Wakely  <jwakely@redhat.com>
 305
 306         * testsuite/18_support/numeric_limits/lowest.cc: Use
 307         numeric_limits<T>::is_integer instead of is_integral<T>::value.
 308
 309 2021-10-11  Jonathan Wakely  <jwakely@redhat.com>
 310
 311         PR libstdc++/89927
 312         * include/bits/regex.h (basic_regex(const _Ch_type*, size_t)):
 313         Add __glibcxx_requires_string_len assertion.
 314         (basic_regex::assign(InputIterator, InputIterator)): Add
 315         __glibcxx_requires_valid_range assertion.
 316         * include/bits/regex_scanner.tcc (_Scanner::_M_advance())
 317         (_Scanner::_M_scan_normal()): Use string literal in assertions.
 318
 319 2021-10-11  Jonathan Wakely  <jwakely@redhat.com>
 320
 321         PR libstdc++/102667
 322         * include/bits/regex.h (match_result::empty()): Optimize by
 323         calling the base function directly.
 324         (match_results::end()): Check _Base_type::empty() not empty().
 325         * testsuite/28_regex/match_results/102667.C: New test.
 326
 327 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
 328
 329         PR libstdc++/98725
 330         * testsuite/18_support/numeric_limits/lowest.cc: Remove use of
 331         _GLIBCXX_USE_WCHAR_T.
 332         * testsuite/18_support/numeric_limits/min_max.cc: Replace use of
 333         _GLIBCXX_USE_WCHAR_T with checks for WCHAR_MIN and WCHAR_MAX.
 334         * testsuite/20_util/from_chars/1_neg.cc: Remove use of
 335         _GLIBCXX_USE_WCHAR_T.
 336         * testsuite/20_util/function_objects/searchers.cc: Likewise. Use
 337         char_traits<wchar_t>::length instead of wcslen.
 338         * testsuite/20_util/hash/requirements/explicit_instantiation.cc:
 339         Likewise.
 340         * testsuite/20_util/is_arithmetic/value.cc: Likewise.
 341         * testsuite/20_util/is_compound/value.cc: Likewise.
 342         * testsuite/20_util/is_floating_point/value.cc: Likewise.
 343         * testsuite/20_util/is_fundamental/value.cc: Likewise.
 344         * testsuite/20_util/is_integral/value.cc: Likewise.
 345         * testsuite/20_util/is_signed/value.cc: Likewise.
 346         * testsuite/20_util/is_unsigned/value.cc: Likewise.
 347         * testsuite/20_util/is_void/value.cc: Likewise.
 348         * testsuite/20_util/make_signed/requirements/typedefs-1.cc:
 349         Likewise.
 350         * testsuite/20_util/make_signed/requirements/typedefs-2.cc:
 351         Likewise.
 352         * testsuite/20_util/make_signed/requirements/typedefs-3.cc:
 353         Likewise.
 354         * testsuite/20_util/make_signed/requirements/typedefs-4.cc:
 355         Likewise.
 356         * testsuite/20_util/make_unsigned/requirements/typedefs-1.cc:
 357         Likewise.
 358         * testsuite/20_util/make_unsigned/requirements/typedefs-2.cc:
 359         Likewise.
 360         * testsuite/20_util/make_unsigned/requirements/typedefs-3.cc:
 361         Likewise.
 362         * testsuite/20_util/to_chars/3.cc: Likewise.
 363         * testsuite/20_util/type_identity/requirements/typedefs.cc:
 364         Likewise.
 365         * testsuite/21_strings/basic_string/hash/debug.cc: Likewise.
 366         * testsuite/21_strings/basic_string/hash/hash.cc: Likewise.
 367         * testsuite/21_strings/basic_string/literals/types-char8_t.cc:
 368         Likewise.
 369         * testsuite/21_strings/basic_string/literals/types.cc: Likewise.
 370         * testsuite/21_strings/basic_string/literals/values-char8_t.cc:
 371         Likewise.
 372         * testsuite/21_strings/basic_string/literals/values.cc:
 373         Likewise.
 374         * testsuite/21_strings/basic_string/modifiers/64422.cc:
 375         Likewise.
 376         * testsuite/21_strings/basic_string/range_access/wchar_t/1.cc:
 377         Likewise.
 378         * testsuite/21_strings/basic_string/requirements/citerators.cc:
 379         Likewise.
 380         * testsuite/21_strings/basic_string/requirements/typedefs.cc:
 381         Likewise.
 382         * testsuite/21_strings/basic_string/types/pmr_typedefs.cc:
 383         Likewise.
 384         * testsuite/21_strings/basic_string_view/literals/types-char8_t.cc:
 385         Likewise.
 386         * testsuite/21_strings/basic_string_view/literals/types.cc:
 387         Likewise.
 388         * testsuite/21_strings/basic_string_view/literals/values-char8_t.cc:
 389         Likewise.
 390         * testsuite/21_strings/basic_string_view/literals/values.cc:
 391         Likewise.
 392         * testsuite/21_strings/basic_string_view/requirements/typedefs.cc:
 393         Likewise.
 394         * testsuite/21_strings/basic_string_view/typedefs.cc: Likewise.
 395         * testsuite/21_strings/char_traits/requirements/constexpr_functions.cc:
 396         Likewise.
 397         * testsuite/21_strings/char_traits/requirements/constexpr_functions_c++17.cc:
 398         Likewise.
 399         * testsuite/21_strings/char_traits/requirements/constexpr_functions_c++20.cc:
 400         Likewise.
 401         * testsuite/22_locale/ctype/is/string/89728_neg.cc: Likewise.
 402         * testsuite/25_algorithms/fill/4.cc: Likewise.
 403         * testsuite/25_algorithms/fill_n/1.cc: Likewise.
 404         * testsuite/experimental/functional/searchers.cc: Likewise. Use
 405         char_traits<wchar_t>::length instead of wcslen.
 406         * testsuite/experimental/polymorphic_allocator/pmr_typedefs_string.cc:
 407         Likewise.
 408         * testsuite/experimental/string_view/literals/types-char8_t.cc:
 409         Likewise.
 410         * testsuite/experimental/string_view/literals/types.cc:
 411         Likewise.
 412         * testsuite/experimental/string_view/literals/values-char8_t.cc:
 413         Likewise.
 414         * testsuite/experimental/string_view/literals/values.cc:
 415         Likewise.
 416         * testsuite/experimental/string_view/range_access/wchar_t/1.cc:
 417         Likewise.
 418         * testsuite/experimental/string_view/requirements/typedefs.cc:
 419         Likewise.
 420         * testsuite/experimental/string_view/typedefs.cc: Likewise.
 421         * testsuite/ext/vstring/range_access.cc: Likewise.
 422         * testsuite/std/concepts/concepts.lang/concept.arithmetic/integral.cc:
 423         Likewise.
 424         * testsuite/std/concepts/concepts.lang/concept.arithmetic/signed_integral.cc:
 425         Likewise.
 426         * testsuite/std/concepts/concepts.lang/concept.arithmetic/unsigned_integral.cc:
 427         Likewise.
 428         * testsuite/tr1/4_metaprogramming/is_arithmetic/value.cc:
 429         Likewise.
 430         * testsuite/tr1/4_metaprogramming/is_compound/value.cc:
 431         Likewise.
 432         * testsuite/tr1/4_metaprogramming/is_floating_point/value.cc:
 433         Likewise.
 434         * testsuite/tr1/4_metaprogramming/is_fundamental/value.cc:
 435         Likewise.
 436         * testsuite/tr1/4_metaprogramming/is_integral/value.cc:
 437         Likewise.
 438         * testsuite/tr1/4_metaprogramming/is_signed/value.cc: Likewise.
 439         * testsuite/tr1/4_metaprogramming/is_unsigned/value.cc:
 440         Likewise.
 441         * testsuite/tr1/4_metaprogramming/is_void/value.cc: Likewise.
 442         * testsuite/tr1/6_containers/hash/24799.cc: Likewise.
 443
 444 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
 445
 446         PR libstdc++/98725
 447         * include/std/ostream (operator<<(basic_ostream<char, Tr>&, wchar_t))
 448         (operator<<(basic_ostream<char, Tr>&, const wchar_t*)): Always
 449         define as deleted. Do not check _GLIBCXX_USE_WCHAR_T.
 450
 451 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
 452
 453         PR libstdc++/98725
 454         * include/bits/locale_conv.h (wstring_convert, wbuffer_convert):
 455         Define unconditionally. Do not check _GLIBCXX_USE_WCHAR_T.
 456
 457 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
 458
 459         PR libstdc++/98725
 460         * include/c_global/cstddef [!_GLIBCXX_USE_WCHAR_T]
 461         (__byte_operand<wchar_t>): Define specialization.
 462         * include/std/type_traits (__make_signed<wchar_t>)
 463         (__make_unsigned<wchar_t>): Remove redundant check for
 464         __WCHAR_TYPE__ being defined.
 465         * include/tr1/type_traits [!_GLIBCXX_USE_WCHAR_T]
 466         (__is_integral_helper<wchar_t>): Likewise.
 467
 468 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
 469
 470         PR libstdc++/98725
 471         * include/ext/rc_string_base.h [!_GLIBCXX_USE_WCHAR_T]
 472         (__rc_string_base<wchar_t>): Define member function.
 473         * include/ext/vstring.h [!_GLIBCXX_USE_WCHAR_T]
 474         (hash<__gnu_cxx::__wvstring>): Define specialization.
 475         * include/ext/vstring_fwd.h [!_GLIBCXX_USE_WCHAR_T] (__wvstring)
 476         (__wsso_string, __wrc_string): Declare typedefs.
 477
 478 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
 479
 480         PR libstdc++/98725
 481         * include/bits/char_traits.h (char_traits<wchar_t>): Define
 482         explicit specialization unconditionally.
 483         * include/bits/basic_string.h (hash<wstring>): Define
 484         unconditionally. Do not check _GLIBCXX_USE_WCHAR_T.
 485         * include/bits/stringfwd.h (wstring): Likewise.
 486         * include/debug/string (wstring): Likewise.
 487         * include/experimental/string_view (experimental::wstring_view)
 488         (hash<experimental::wstring_view>): Likewise.
 489         * include/std/string (pmr::wstring, hash<pmr::wstring>):
 490         Likewise.
 491         * include/std/string_view (wstring_view, hash<wstring_view>):
 492         Likewise.
 493
 494 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
 495
 496         * testsuite/27_io/basic_filebuf/close/81256.cc: Moved to...
 497         * testsuite/27_io/basic_filebuf/close/wchar_t/81256.cc: ...here.
 498
 499 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
 500
 501         * testsuite/22_locale/conversions/buffer/1.cc: Check
 502         _GLIBCXX_USE_WCHAR_T.
 503         * testsuite/22_locale/conversions/buffer/3.cc: Likewise. Add
 504         test using char16_t.
 505         * testsuite/22_locale/conversions/string/1.cc: Check
 506         _GLIBCXX_USE_WCHAR_T.
 507         * testsuite/27_io/filesystem/path/generic/generic_string.cc:
 508         Likewise.
 509         * testsuite/27_io/filesystem/path/modifiers/make_preferred.cc:
 510         Likewise.
 511         * testsuite/27_io/filesystem/path/native/alloc.cc: Likewise.
 512         * testsuite/27_io/filesystem/path/native/string-char8_t.cc:
 513         Likewise.
 514         * testsuite/27_io/filesystem/path/native/string.cc: Likewise.
 515         * testsuite/28_regex/algorithms/regex_match/extended/wstring_locale.cc:
 516         Likewise.
 517         * testsuite/experimental/filesystem/path/generic/generic_string.cc:
 518         Likewise.
 519         * testsuite/experimental/filesystem/path/native/alloc.cc:
 520         Likewise.
 521         * testsuite/experimental/filesystem/path/native/string-char8_t.cc:
 522         Likewise.
 523         * testsuite/experimental/filesystem/path/native/string.cc:
 524         Likewise.
 525
 526 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
 527
 528         * testsuite/26_numerics/bit/bit.rotate/rotr.cc:
 529         * testsuite/util/testsuite_common_types.h:
 530
 531 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
 532
 533         * testsuite/18_support/numeric_limits/40856.cc: Replace use of
 534         _GLIBCXX_USE_INT128.
 535         * testsuite/18_support/numeric_limits/dr559.cc: Likewise.
 536         * testsuite/18_support/numeric_limits/lowest.cc: Likewise.
 537         * testsuite/18_support/numeric_limits/max_digits10.cc: Likewise.
 538         * testsuite/20_util/is_floating_point/value.cc: Likewise.
 539         * testsuite/20_util/is_integral/value.cc: Likewise.
 540         * testsuite/20_util/is_signed/value.cc: Likewise.
 541         * testsuite/20_util/is_unsigned/value.cc: Likewise.
 542         * testsuite/20_util/make_signed/requirements/typedefs-1.cc:
 543         Likewise.
 544         * testsuite/20_util/make_signed/requirements/typedefs-2.cc:
 545         Likewise.
 546         * testsuite/20_util/make_unsigned/requirements/typedefs-1.cc:
 547         Likewise.
 548         * testsuite/20_util/make_unsigned/requirements/typedefs-2.cc:
 549         Likewise.
 550         * testsuite/20_util/type_identity/requirements/typedefs.cc:
 551         Likewise.
 552         * testsuite/26_numerics/bit/bit.count/countl_one.cc: Likewise.
 553         * testsuite/26_numerics/bit/bit.count/countl_zero.cc: Likewise.
 554         * testsuite/26_numerics/bit/bit.count/countr_one.cc: Likewise.
 555         * testsuite/26_numerics/bit/bit.count/countr_zero.cc: Likewise.
 556         * testsuite/26_numerics/bit/bit.count/popcount.cc: Likewise.
 557         * testsuite/26_numerics/bit/bit.pow.two/bit_ceil.cc: Likewise.
 558         * testsuite/26_numerics/bit/bit.pow.two/bit_floor.cc: Likewise.
 559         * testsuite/26_numerics/bit/bit.pow.two/bit_width.cc: Likewise.
 560         * testsuite/26_numerics/bit/bit.pow.two/has_single_bit.cc:
 561         Likewise.
 562         * testsuite/26_numerics/bit/bit.rotate/rotl.cc: Likewise.
 563
 564 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
 565
 566         * include/bits/hashtable_policy.h (_Select1st): Replace use of
 567         std::get.
 568         (_Select2nd): Remove.
 569         (_NodeBuilder::_S_build): Use _NodeGenerator::__node_type
 570         typedef instead of deducing it. Remove unnecessary piecewise
 571         construction.
 572         (_ReuseOrAllocNode): Make __node_type public.
 573         (_Map_base): Adjust partial specialization to be able to extract
 574         the mapped_type without using tuple_element.
 575         (_Map_base::at): Define inline
 576         * testsuite/23_containers/unordered_map/requirements/53339.cc:
 577         Remove XFAIL.
 578         * testsuite/23_containers/unordered_multimap/requirements/53339.cc:
 579         Likewise.
 580
 581 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
 582
 583         * include/bits/hashtable.h: Move static assertion to destructor.
 584         * include/bits/hashtable_policy.h: Deduce value type from node
 585         type without instantiating it.
 586
 587 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
 588
 589         * src/c++11/limits.cc: Fail if __cpp_inline_variables is
 590         defined.
 591
 592 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
 593
 594         PR libstdc++/92546
 595         * include/bits/ranges_algobase.h: Replace <iterator> with a
 596         subset of the headers it includes.
 597
 598 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
 599
 600         * include/experimental/deque (erase, erase_if): Revert changes
 601         to avoid debug mode overhead.
 602         * include/experimental/map (erase, erase_if): Likewise.
 603         * include/experimental/set (erase, erase_if): Likewise.
 604         * include/experimental/unordered_map (erase, erase_if):
 605         Likewise.
 606         * include/experimental/unordered_set (erase, erase_if):
 607         Likewise.
 608         * include/experimental/vector (erase, erase_if): Likewise.
 609         * include/std/deque (erase, erase_if): Likewise.
 610         * include/std/map (erase, erase_if): Likewise.
 611         * include/std/set (erase, erase_if): Likewise.
 612         * include/std/unordered_map (erase, erase_if): Likewise.
 613         * include/std/unordered_set (erase, erase_if): Likewise.
 614         * include/std/vector (erase, erase_if): Likewise.
 615
 616 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
 617
 618         * include/std/chrono (__detail::__units_suffix_misc): New
 619         helper function.
 620         (__detail::__units_suffix): Likewise.
 621         (chrono::operator<<(basic_ostream&, const duration&)): Define.
 622         * testsuite/20_util/duration/io.cc: New test.
 623
 624 2021-10-07  Jonathan Wakely  <jwakely@redhat.com>
 625
 626         * include/Makefile.am: Add new header.
 627         * include/Makefile.in: Regenerate.
 628         * include/std/chrono (duration, time_point, system_clock)
 629         (steady_clock, high_resolution_clock, chrono_literals, sys_time)
 630         (file_clock, file_time): Move to ...
 631         * include/bits/chrono.h: New file.
 632         * include/bits/atomic_futex.h: Include new header instead of
 633         <chrono>.
 634         * include/bits/atomic_timed_wait.h: Likewise.
 635         * include/bits/fs_fwd.h: Likewise.
 636         * include/bits/semaphore_base.h: Likewise.
 637         * include/bits/this_thread_sleep.h: Likewise.
 638         * include/bits/unique_lock.h: Likewise.
 639         * include/experimental/bits/fs_fwd.h: Likewise.
 640         * include/experimental/chrono: Likewise.
 641         * include/experimental/io_context: Likewise.
 642         * include/experimental/netfwd: Likewise.
 643         * include/experimental/timer: Likewise.
 644         * include/std/condition_variable: Likewise.
 645         * include/std/mutex: Likewise.
 646         * include/std/shared_mutex: Likewise.
 647
 648 2021-10-07  Jonathan Wakely  <jwakely@redhat.com>
 649
 650         PR libstdc++/102377
 651         * include/bits/atomic_wait.h (__waiter_pool_base:_S_align):
 652         Hardcode to 64 instead of using non-constant constant.
 653
 654 2021-10-07  Jonathan Wakely  <jwakely@redhat.com>
 655
 656         * include/bits/erase_if.h (__erase_nodes_if): Remove redundant
 657         __niter_base calls.
 658         * include/std/string (erase, erase_if): Likewise.
 659         * include/std/deque (erase, erase_if): Access non-debug
 660         container directly.
 661         * include/std/map (erase, erase_if): Likewise.
 662         * include/std/set (erase, erase_if): Likewise.
 663         * include/std/unordered_map (erase, erase_if): Likewise.
 664         * include/std/unordered_set (erase, erase_if): Likewise.
 665         * include/std/vector (erase, erase_if): Likewise.
 666         * include/experimental/deque (erase, erase_if): Likewise.
 667         * include/experimental/map (erase, erase_if): Likewise.
 668         * include/experimental/set (erase, erase_if): Likewise.
 669         * include/experimental/unordered_map (erase, erase_if):
 670         Likewise.
 671         * include/experimental/unordered_set (erase, erase_if):
 672         Likewise.
 673         * include/experimental/vector (erase, erase_if): Likewise.
 674
 675 2021-10-06  Jonathan Wakely  <jwakely@redhat.com>
 676
 677         * include/Makefile.am: Add new headers.
 678         * include/Makefile.in: Regenerate.
 679         * include/std/functional: Include <bits/move_only_function.h>.
 680         * include/std/version (__cpp_lib_move_only_function): Define.
 681         * include/bits/mofunc_impl.h: New file.
 682         * include/bits/move_only_function.h: New file.
 683         * testsuite/20_util/move_only_function/call.cc: New test.
 684         * testsuite/20_util/move_only_function/cons.cc: New test.
 685         * testsuite/20_util/move_only_function/move.cc: New test.
 686         * testsuite/20_util/move_only_function/version.cc: New test.
 687
 688 2021-10-05  Jonathan Wakely  <jwakely@redhat.com>
 689
 690         * testsuite/21_strings/basic_string_view/requirements/trivially_copyable.cc:
 691         New test.
 692         * testsuite/23_containers/span/trivially_copyable.cc: New test.
 693
 694 2021-10-05  Jonathan Wakely  <jwakely@redhat.com>
 695
 696         * include/bits/utility.h (__is_in_place_type_v): Define
 697         variable template to detect in_place_type_t specializations.
 698         (__is_in_place_type): Replace class template with alias
 699         template using __is_in_place_type_v.
 700         * include/std/any (any(T&&)): Check __is_in_place_type first and
 701         avoid instantiating is_copy_constructible unnecessarily.
 702
 703 2021-10-05  Jonathan Wakely  <jwakely@redhat.com>
 704
 705         * testsuite/20_util/integer_comparisons/greater.cc: New test.
 706
 707 2021-10-05  Jonathan Wakely  <jwakely@redhat.com>
 708
 709         * testsuite/27_io/basic_ostream/inserters_other/char/volatile_ptr.cc:
 710         Check result matches non-volatile pointer.
 711
 712 2021-10-05  Jonathan Wakely  <jwakely@redhat.com>
 713
 714         PR c++/102535
 715         * testsuite/20_util/is_trivially_constructible/value.cc: Adjust
 716         expected value for C++20.
 717
 718 2021-10-05  Jonathan Wakely  <jwakely@redhat.com>
 719
 720         * include/bits/std_function.h (_Any_data::_M_access): Add
 721         noexcept.
 722         (_Function_base::_Base_manager::_M_get_pointer): Likewise.
 723         (_Function_base::_Base_manager::_M_not_empty_function):
 724         Likewise.
 725
 726 2021-10-05  Jonathan Wakely  <jwakely@redhat.com>
 727
 728         * include/std/ostream (operator<<(const volatile void*)):
 729         Add new overload, as per P1147R1.
 730         * testsuite/27_io/basic_ostream/inserters_other/char/volatile_ptr.cc:
 731         New test.
 732
 733 2021-10-05  Jonathan Wakely  <jwakely@redhat.com>
 734
 735         * include/bits/stl_queue.h
 736         (__cpp_lib_adaptor_iterator_pair_constructor): Set to correct
 737         value.
 738         * include/bits/stl_stack.h
 739         (__cpp_lib_adaptor_iterator_pair_constructor): Likewise.
 740         * include/std/version
 741         (__cpp_lib_adaptor_iterator_pair_constructor): Likewise.
 742         * testsuite/23_containers/queue/cons_from_iters.cc: Update
 743         expected value.
 744         * testsuite/23_containers/stack/cons_from_iters.cc: Likewise.
 745
 746 2021-10-04  Jonathan Wakely  <jwakely@redhat.com>
 747
 748         * include/bits/forward_list.h (forward_list): Use non-deduced
 749         context for allocator parameter of allocator-extended copy and
 750         move constructors.
 751         * include/bits/stl_bvector.h (vector<bool>): Likewise.
 752         * include/bits/stl_deque.h (deque): Likewise.
 753         * include/bits/stl_list.h (list): Likewise.
 754         * include/bits/stl_map.h (map): Likewise.
 755         * include/bits/stl_multimap.h (multimap): Likewise.
 756         * include/bits/stl_multiset.h (multiset): Likewise.
 757         * include/bits/stl_set.h (set): Likewise.
 758         * include/bits/stl_vector.h (vector): Likewise.
 759         * include/bits/stl_queue.h (queue, priority_queue): Do not
 760         constrain Allocator template parameter of deduction guides that
 761         have a Container parameter.
 762         * include/bits/stl_stack.h (stack): Likewise.
 763         * include/debug/deque (__gnu_debug::deque): Use non-deduced
 764         context for allocator parameter of allocator-extended copy and
 765         move constructors.
 766         * include/debug/list (__gnu_debug::list): Likewise.
 767         * include/debug/map.h (__gnu_debug::map): Likewise.
 768         * include/debug/multimap.h (__gnu_debug::multimap): Likewise.
 769         * include/debug/multiset.h (__gnu_debug::multiset): Likewise.
 770         * include/debug/set.h (__gnu_debug::set): Likewise.
 771         * include/debug/vector (__gnu_debug::vector): Likewise.
 772         * testsuite/23_containers/deque/cons/deduction.cc: Test class
 773         template argument deduction with non-deduced allocator
 774         arguments.
 775         * testsuite/23_containers/forward_list/cons/deduction.cc:
 776         Likewise.
 777         * testsuite/23_containers/list/cons/deduction.cc: Likewise.
 778         * testsuite/23_containers/map/cons/deduction.cc: Likewise.
 779         * testsuite/23_containers/multimap/cons/deduction.cc: Likewise.
 780         * testsuite/23_containers/multiset/cons/deduction.cc: Likewise.
 781         * testsuite/23_containers/priority_queue/deduction.cc: Likewise.
 782         * testsuite/23_containers/queue/deduction.cc: Likewise.
 783         * testsuite/23_containers/set/cons/deduction.cc: Likewise.
 784         * testsuite/23_containers/stack/deduction.cc: Likewise.
 785         * testsuite/23_containers/unordered_map/cons/deduction.cc:
 786         Likewise.
 787         * testsuite/23_containers/unordered_multimap/cons/deduction.cc:
 788         Likewise.
 789         * testsuite/23_containers/unordered_multiset/cons/deduction.cc:
 790         Likewise.
 791         * testsuite/23_containers/unordered_set/cons/deduction.cc:
 792         Likewise.
 793         * testsuite/23_containers/vector/cons/deduction.cc: Likewise.
 794
 795 2021-10-04  Jonathan Wakely  <jwakely@redhat.com>
 796
 797         * include/std/variant (__detail::__variant::__as): Add missing
 798         noexcept to first overload.
 799
 800 2021-10-04  Jonathan Wakely  <jwakely@redhat.com>
 801
 802         * include/bits/basic_string.h (basic_string(nullptr_t)): Define
 803         as deleted.
 804         (operator=(nullptr_t)): Likewise.
 805         * include/bits/cow_string.h (basic_string(nullptr_t)): Likewise.
 806         (operator=(nullptr_t)): Likewise.
 807         * include/std/string_view (basic_string_view(nullptr_t)):
 808         Likewise.
 809         * testsuite/21_strings/basic_string/cons/char/nullptr.cc: New test.
 810         * testsuite/21_strings/basic_string_view/cons/char/nonnull.cc:
 811         Change dg-warning to dg-error.
 812         * testsuite/21_strings/basic_string_view/cons/wchar_t/nonnull.cc:
 813         Likewise.
 814
 815 2021-10-02  Jonathan Wakely  <jwakely@redhat.com>
 816
 817         * src/c++17/fs_ops.cc (create_directory): Fix typo in enum name.
 818         * src/filesystem/ops-common.h (__last_system_error): Add
 819         explicit cast to avoid narrowing conversion.
 820         (do_space): Fix type in function name.
 821
 822 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
 823
 824         PR libstdc++/102100
 825         * include/Makefile.am (c++config.h): Define
 826         _GLIBCXX_VERBOSE_ASSERT based on configure output.
 827         * include/Makefile.in: Regenerate.
 828         * include/bits/c++config: Fix condition for verbose assertions.
 829
 830 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
 831
 832         PR libstdc++/92546
 833         * include/bits/erase_if.h (__erase_nodes_if): Use __niter_base to
 834         unwrap debug iterators.
 835         * include/bits/refwrap.h: Do not error if included in C++03.
 836         * include/bits/stl_algo.h (__remove_if): Move to ...
 837         * include/bits/stl_algobase.h (__remove_if): ... here.
 838         * include/std/deque (erase, erase_if): Use __remove_if instead of
 839         remove and remove_if.
 840         * include/std/string (erase, erase_if): Likewise.
 841         * include/std/vector (erase, erase_if): Likewise.
 842
 843 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
 844
 845         PR libstdc++/66742
 846         * include/bits/list.tcc (list::sort()): Use _Scratch_list
 847         objects for splicing and merging.
 848         (list::sort(StrictWeakOrdering)): Likewise.
 849         * include/bits/stl_list.h (__detail::_Scratch_list): New type.
 850         * src/c++98/list.cc (_List_node_base::_M_transfer): Add
 851         assertion for --enable-libstdcxx-debug library.
 852         * testsuite/23_containers/list/operations/66742.cc: New test.
 853
 854 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
 855
 856         PR libstdc++/100612
 857         * include/std/thread (__pmf_expects_stop_token): New variable
 858         template to detect a pointer to member function that needs a
 859         stop_token to be added to the arguments.
 860         (jthread::__S_create): Use __pmf_expects_stop_token.
 861         (jthread::__S_create_pmf): New function.
 862         * testsuite/30_threads/jthread/100612.cc: New test.
 863
 864 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
 865
 866         * include/bits/stl_queue.h
 867         (__cpp_lib_adaptor_iterator_pair_constructor): Define for C++23, as
 868         per P1425R4.
 869         (queue(InputIterator, InputIterator)): Likewise.
 870         (queue(InputIterator, InputIterator, const Alloc&)): Likewise.
 871         * include/bits/stl_stack.h
 872         (__cpp_lib_adaptor_iterator_pair_constructor): Likewise.
 873         (stack(InputIterator, InputIterator)): Likewise.
 874         (stack(InputIterator, InputIterator, const Alloc&)): Likewise.
 875         * include/std/version (__cpp_lib_adaptor_iterator_pair_constructor):
 876         Define.
 877         * testsuite/23_containers/queue/cons_from_iters.cc: New test.
 878         * testsuite/23_containers/stack/cons_from_iters.cc: New test.
 879
 880 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
 881
 882         * include/bits/stl_queue.h (priority_queue): Add
 883         allocator-extended overloads for constructors taking iterator.
 884         * testsuite/23_containers/priority_queue/lwg3506.cc: New test.
 885
 886 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
 887
 888         * include/bits/stl_queue.h (priority_queue): Construct sequence
 889         from iterators when no sequence argument is present (LWG 3529).
 890         * testsuite/23_containers/priority_queue/lwg3529.cc: New test.
 891
 892 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
 893
 894         * include/bits/stl_queue.h (priority_queue): Constrain
 895         constructors with InputIterator parameters (LWG 3522).
 896         * testsuite/23_containers/priority_queue/lwg3522.cc: New test.
 897
 898 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
 899
 900         * include/bits/ranges_base.h (ranges::distance): Split overload
 901         into two (LWG 3392).
 902         * testsuite/24_iterators/range_operations/lwg3392.cc: New test.
 903
 904 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
 905
 906         * testsuite/30_threads/thread/cons/3.cc: Remove derivation from
 907         std::unary_function.
 908         * testsuite/30_threads/thread/cons/4.cc: Likewise.
 909         * testsuite/30_threads/thread/cons/5.cc: Likewise.
 910
 911 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
 912
 913         * testsuite/ext/pb_ds/example/basic_multimap.cc: Remove
 914         unnecesary derivation from std::unary_function.
 915         * testsuite/ext/pb_ds/example/erase_if.cc: Likewise.
 916         * testsuite/ext/pb_ds/example/hash_illegal_resize.cc: Likewise.
 917         * testsuite/ext/pb_ds/example/hash_initial_size.cc: Likewise.
 918         * testsuite/ext/pb_ds/example/hash_load_set_change.cc: Likewise.
 919         * testsuite/ext/pb_ds/example/hash_mod.cc: Likewise.
 920         * testsuite/ext/pb_ds/example/hash_resize.cc: Likewise.
 921         * testsuite/ext/pb_ds/example/hash_shift_mask.cc: Likewise.
 922         * testsuite/ext/pb_ds/example/priority_queue_dijkstra.cc:
 923         Likewise.
 924         * testsuite/ext/pb_ds/example/ranged_hash.cc: Likewise.
 925         * testsuite/ext/pb_ds/example/store_hash.cc: Likewise.
 926
 927 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
 928
 929         * src/c++11/functexcept.cc (__throw_out_of_range_fmt): Do not
 930         expand the format string for freestanding, or non-vebose, or if
 931         we're just going to abort anyway.
 932         * src/c++11/snprintf_lite.cc: Remove unused header and
 933         declaration.
 934
 935 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
 936
 937         * include/std/variant (__do_visit): Use variant_npos instead of
 938         literal -1 that requires a narrowing conversion.
 939
 940 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
 941
 942         PR libstdc++/99327
 943         * src/filesystem/ops-common.h (__unsupported): New function to
 944         return a suitable error code for missing functionality.
 945         (posix::off_t): New typedef.
 946         (posix::*): Set errno to ENOSYS instead of ENOTSUP for no-op
 947         fallback implementations.
 948         (do_copy_file): Replace uses of errc::not_supported.
 949         * src/c++17/fs_ops.cc (fs::copy, fs::copy_file, create_dir)
 950         (fs::create_directory, fs::create_directory_symlink)
 951         (fs::create_hard_link, fs::create_symlink, fs::current_path)
 952         (fs::equivalent, do_stat, fs::file_size, fs::hard_link_count)
 953         (fs::last_write_time, fs::permissions, fs::read_symlink):
 954         Replace uses of errc::not_supported.
 955         (fs::resize_file): Qualify off_t.
 956         * src/filesystem/ops.cc (fs::copy, fs::copy_file, create_dir)
 957         (fs::create_directory, fs::create_directory_symlink)
 958         (fs::create_hard_link, fs::create_symlink, fs::current_path)
 959         (fs::equivalent, do_stat, fs::file_size, fs::last_write_time)
 960         (fs::permissions, fs::read_symlink, fs::system_complete):
 961         Replace uses of errc::not_supported.
 962         (fs::resize_file): Qualify off_t and enable unconditionally.
 963         * testsuite/19_diagnostics/system_error/cons-1.cc: Likewise.
 964
 965 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
 966
 967         * src/filesystem/ops-common.h (last_error): New helper function.
 968         (filesystem::do_space): Use last_error().
 969         * src/c++17/fs_ops.cc (fs::absolute, fs::create_hard_link)
 970         (fs::equivalent, fs::remove, fs::temp_directory_path): Use
 971         last_error().
 972         * src/filesystem/ops.cc (fs::create_hard_link)
 973         (fs::remove, fs::temp_directory_path): Likewise.
 974
 975 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
 976
 977         * include/std/type_traits (__conditional): New class template
 978         for internal uses of std::conditional.
 979         (__conditional_t): New alias template to replace conditional_t.
 980         (__and_, __or_, __result_of_memfun, __result_of_memobj): Use
 981         __conditional_t instead of conditional::type.
 982         * include/bits/atomic_base.h (__atomic_impl::_Diff): Likewise.
 983         * include/bits/hashtable.h (_Hashtable): Likewise.
 984         * include/bits/hashtable_policy.h (_Node_iterator, _Insert_base)
 985         (_Local_iterator): Likewise. Replace typedefs with
 986         using-declarations.
 987         * include/bits/move.h (move_if_noexcept): Use __conditional_t.
 988         * include/bits/parse_numbers.h (_Select_int_base): Likewise.
 989         * include/bits/ptr_traits.h (__make_not_void): Likewise.
 990         * include/bits/ranges_algobase.h (__copy_or_move_backward)
 991         (__copy_or_move): Likewise.
 992         * include/bits/ranges_base.h (borrowed_iterator_t): Likewise.
 993         * include/bits/ranges_util.h (borrowed_subrange_t): Likewise.
 994         * include/bits/regex_compiler.h (_BracketMatcher): Use
 995         __conditional_t. Replace typedefs with using-declarations.
 996         * include/bits/shared_ptr_base.h (__shared_count): Use
 997         __conditional_t.
 998         * include/bits/stl_algobase.h (__copy_move, __copy_move_backward):
 999         Likewise.
1000         * include/bits/stl_iterator.h (__detail::__clamp_iter_cat)
1001         (reverse_iterator::iterator_concept)
1002         (__make_move_if_noexcept_iterator)
1003         (iterator_traits<common_iterator<_It, _Sent>>)
1004         (iterator_traits<counted_iterator<_It>>): Likewise.
1005         * include/bits/stl_pair.h (_PCC, pair::operator=): Likewise.
1006         * include/bits/stl_tree.h (_Rb_tree::insert_return_type)
1007         (_Rb_tree::_M_clone_node): Likewise.
1008         * include/bits/unique_ptr.h (unique_ptr(unique_ptr<U,E>&&)):
1009         Likewise.
1010         * include/bits/uses_allocator.h (__uses_alloc): Likewise.
1011         (__is_uses_allocator_predicate): Likewise.
1012         * include/debug/functions.h (__foreign_iterator_aux2): Likewise.
1013         * include/experimental/any (any::_Manager, __any_caster):
1014         Likewise.
1015         * include/experimental/executor (async_completion): Likewise.
1016         * include/experimental/functional (__boyer_moore_base_t):
1017         Likewise.
1018         * include/std/any (any::_Manager): Likewise.
1019         * include/std/functional (__boyer_moore_base_t): Likewise.
1020         * include/std/ranges (borrowed_iterator_t)
1021         (borrowed_subrange_t, __detail::__maybe_present_t)
1022         (__detail::__maybe_const_t, split_view): Likewise.
1023         * include/std/tuple (__empty_not_final, tuple::operator=):
1024         Likewise.
1025         * include/std/variant (__detail::__variant::__get_t): Likewise.
1026
1027 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1028
1029         PR libstdc++/78113
1030         * include/std/variant (__do_visit): Use a switch when we have a
1031         single variant with a small number of alternatives.
1032
1033 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1034
1035         PR libstdc++/90943
1036         * include/std/variant (__cpp_lib_variant): Update value.
1037         (__detail::__variant::__as): New helpers implementing the
1038         as-variant exposition-only function templates.
1039         (visit, visit<R>): Use __as to upcast the variant parameters.
1040         * include/std/version (__cpp_lib_variant): Update value.
1041         * testsuite/20_util/variant/visit_inherited.cc: New test.
1042
1043 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1044
1045         * include/bits/stl_iterator.h (__normal_iterator): Simplify
1046         converting constructor and do not require _Container::pointer.
1047
1048 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1049
1050         * include/bits/cow_string.h [_GLIBCXX_FULLY_DYNAMIC_STRING]
1051         (basic_string(basic_string&&)): Add noexcept and avoid
1052         allocation, by sharing rep with the rvalue string.
1053
1054 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1055
1056         * include/bits/stl_iterator.h (common_iterator::__arrow_proxy)
1057         (common_iterator::__postfix_proxy): Add noexcept.
1058
1059 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1060
1061         PR libstdc++/94418
1062         * include/bits/stl_iterator.h (reverse_iterator): Use
1063         conditional noexcept on constructors and assignment operators.
1064         * testsuite/24_iterators/reverse_iterator/noexcept.cc: New test.
1065
1066 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1067
1068         PR libstdc++/100153
1069         * include/bits/vector.tcc (vector<bool>::_M_shrink_to_fit()):
1070         When size() is zero just deallocate and reset.
1071
1072 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1073
1074         PR libstdc++/96733
1075         * include/bits/stl_algo.h (clamp): Use std::min and std::max.
1076
1077 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1078
1079         * include/bits/regex.h (basic_regex::multiline): Define for
1080         non-strict C++11 and C++14 modes.
1081         * include/bits/regex_constants.h (regex_constants::multiline):
1082         Add _GLIBCXX_RESOLVE_LIB_DEFECTS comment.
1083
1084 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1085
1086         * testsuite/25_algorithms/is_permutation/2.cc: Include <iterator>.
1087
1088 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1089
1090         * include/bits/stream_iterator.h (istream_iterator): Add
1091         noexcept to constructors and non-throwing member functions and
1092         friend functions.
1093         (ostream_iterator): Likewise.
1094
1095 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1096
1097         * include/bits/boost_concept_check.h (_Is_vector_bool_iterator):
1098         New trait to identify vector<bool> iterators, including debug
1099         ones.
1100         (_ForwardIteratorReferenceConcept): Add default template
1101         argument using _Is_vector_bool_iterator and use it in partial
1102         specialization for the vector<bool> cases.
1103         (_Mutable_ForwardIteratorReferenceConcept): Likewise.
1104         * testsuite/24_iterators/operations/prev_neg.cc: Adjust dg-error
1105         line number.
1106
1107 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1108
1109         * include/bits/list.tcc (list::merge): Remove call to size() and
1110         try-catch block. Use _Finalize_merge instead.
1111         * include/bits/stl_list.h (list::_Finalize_merge): New
1112         scope guard type to update _M_size members after a merge.
1113
1114 2021-09-30  Jonathan Wakely  <jwakely@redhat.com>
1115
1116         * include/bits/regex.h (basic_regex::multiline): Fix #if
1117         condition.
1118
1119 2021-09-29  Jonathan Wakely  <jwakely@redhat.com>
1120
1121         * include/bits/regex.h (basic_regex::multiline): Define constant
1122         for C++17.
1123         * include/bits/regex_constants.h (regex_constants::multiline):
1124         Define constant for C++17.
1125         (regex_constants::__multiline): Define duplicate constant for
1126         internal use in C++11 and C++14.
1127         * include/bits/regex_executor.h (_Executor::_M_match_multiline()):
1128         New member function.
1129         (_Executor::_M_is_line_terminator(_CharT)): New member function.
1130         (_Executor::_M_at_begin(), _Executor::_M_at_end()): Use new
1131         member functions to support multiline matches.
1132         * testsuite/28_regex/algorithms/regex_match/multiline.cc: New test.
1133
1134 2021-09-29  Jonathan Wakely  <jwakely@redhat.com>
1135
1136         * include/bits/regex_compiler.h (_Compiler::_S_validate): New
1137         function.
1138         * include/bits/regex_compiler.tcc (_Compiler::_Compiler): Use
1139         _S_validate to check flags.
1140         * include/bits/regex_error.h (_S_grammar): New error code for
1141         internal use.
1142         * testsuite/28_regex/basic_regex/ctors/grammar.cc: New test.
1143
1144 2021-09-29  Jonathan Wakely  <jwakely@redhat.com>
1145
1146         PR libstdc++/84110
1147         * include/bits/regex_error.h (regex_constants::_S_null): New
1148         error code for internal use.
1149         * include/bits/regex_scanner.tcc (_Scanner::_M_scan_normal()):
1150         Check for null character.
1151         * testsuite/28_regex/basic_regex/84110.cc: New test.
1152
1153 2021-09-29  Jonathan Wakely  <jwakely@redhat.com>
1154
1155         * include/bits/regex.h (__detail::__is_contiguous_iter): Move
1156         here from <bits/regex_compiler.h>.
1157         (basic_regex::_M_compile): New function to compile an NFA from
1158         a regular expression string.
1159         (basic_regex::basic_regex): Use _M_compile instead of delegating
1160         to other constructors.
1161         (basic_regex::operator=(const basic_regex&)): Define as
1162         defaulted.
1163         (basic_regex::operator=(initializer_list<C>)): Use _M_compile.
1164         (basic_regex::assign(const basic_regex&)): Use copy assignment.
1165         (basic_regex::assign(basic_regex&&)): Use move assignment.
1166         (basic_regex::assign(const C*, flag_type)): Use _M_compile
1167         instead of constructing a temporary string.
1168         (basic_regex::assign(const C*, size_t, flag_type)): Likewise.
1169         (basic_regex::assign(const basic_string<C,T,A>&, flag_type)):
1170         Use _M_compile instead of constructing a temporary basic_regex.
1171         (basic_regex::assign(InputIter, InputIter, flag_type)): Avoid
1172         constructing a temporary string for contiguous iterators of the
1173         right value type.
1174         * include/bits/regex_compiler.h (__is_contiguous_iter): Move to
1175         <bits/regex.h>.
1176         (__enable_if_contiguous_iter, __disable_if_contiguous_iter)
1177         (__compile_nfa): Remove.
1178         * testsuite/28_regex/basic_regex/assign/exception_safety.cc: New
1179         test.
1180         * testsuite/28_regex/basic_regex/ctors/char/other.cc: New test.
1181
1182 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
1183
1184         * include/bits/atomic_timed_wait.h (__platform_wait_until_impl):
1185         Return false for ETIMEDOUT and true otherwise.
1186
1187 2021-09-28  François Dumont  <fdumont@gcc.gnu.org>
1188
1189         * testsuite/20_util/default_delete/48631_neg.cc: Adapt dg-prune-output message
1190         to also match message with '__8' in it.
1191
1192 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
1193
1194         * include/bits/regex_automaton.h (_NFA_base::_SizeT): Remove.
1195         * include/bits/regex_compiler.h (_Compiler::_IterT): Remove.
1196         * include/bits/regex_compiler.tcc: Likewise.
1197         * include/bits/regex_scanner.h (_Scanner::_IterT): Remove.
1198         * include/bits/regex_scanner.tcc: Likewise.
1199
1200 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
1201
1202         * include/bits/regex_compiler.tcc: Add line break in empty while
1203         statement.
1204         * include/bits/regex_executor.tcc: Avoid unused parameter
1205         warning.
1206
1207 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
1208
1209         * include/bits/regex.h (basic_regex, swap): Add noexcept to
1210         non-throwing functions.
1211         * include/bits/regex_automaton.h (_State_base, _State)
1212         (_NFA_base): Likewise.
1213         * include/bits/regex_compiler.h (_Compiler): Likewise.
1214         * include/bits/regex_error.h (regex_error::code()): Likewise.
1215         * include/bits/regex_scanner.h (_Scanner): Likewise.
1216
1217 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
1218
1219         * include/bits/atomic_wait.h (_GLIBCXX_HAVE_PLATFORM_WAIT):
1220         Define before first attempt to check it.
1221
1222 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
1223
1224         * testsuite/23_containers/priority_queue/requirements/explicit_instantiation/1.cc:
1225         Do not check non-default constructible sequences when
1226         _GLIBCXX_CONCEPT_CHECKS is defined.
1227         * testsuite/23_containers/priority_queue/requirements/explicit_instantiation/1_c++98.cc:
1228         Likewise.
1229         * testsuite/23_containers/queue/requirements/explicit_instantiation/1.cc:
1230         Likewise.
1231         * testsuite/23_containers/queue/requirements/explicit_instantiation/1_c++98.cc:
1232         Likewise.
1233         * testsuite/23_containers/stack/requirements/explicit_instantiation/1.cc:
1234         Likewise.
1235         * testsuite/23_containers/stack/requirements/explicit_instantiation/1_c++98.cc:
1236         Likewise.
1237
1238 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
1239
1240         * testsuite/23_containers/deque/requirements/explicit_instantiation/3.cc:
1241         Do not test implicit allocator rebinding when _GLIBCXX_CONCEPT_CHECKS
1242         is defined.
1243         * testsuite/23_containers/forward_list/requirements/explicit_instantiation/3.cc:
1244         Likewise.
1245         * testsuite/23_containers/list/requirements/explicit_instantiation/3.cc:
1246         Likewise.
1247         * testsuite/23_containers/list/requirements/explicit_instantiation/5.cc:
1248         Likewise.
1249         * testsuite/23_containers/map/requirements/explicit_instantiation/3.cc:
1250         Likewise.
1251         * testsuite/23_containers/map/requirements/explicit_instantiation/5.cc:
1252         Likewise.
1253         * testsuite/23_containers/multimap/requirements/explicit_instantiation/3.cc:
1254         Likewise.
1255         * testsuite/23_containers/multimap/requirements/explicit_instantiation/5.cc:
1256         Likewise.
1257         * testsuite/23_containers/multiset/requirements/explicit_instantiation/3.cc:
1258         Likewise.
1259         * testsuite/23_containers/multiset/requirements/explicit_instantiation/5.cc:
1260         Likewise.
1261         * testsuite/23_containers/set/requirements/explicit_instantiation/3.cc:
1262         Likewise.
1263         * testsuite/23_containers/set/requirements/explicit_instantiation/5.cc:
1264         Likewise.
1265         * testsuite/23_containers/unordered_map/requirements/explicit_instantiation/3.cc:
1266         Likewise.
1267         * testsuite/23_containers/unordered_multimap/requirements/explicit_instantiation/3.cc:
1268         Likewise.
1269         * testsuite/23_containers/unordered_multiset/requirements/explicit_instantiation/3.cc:
1270         Likewise.
1271         * testsuite/23_containers/unordered_set/requirements/explicit_instantiation/3.cc:
1272         Likewise.
1273         * testsuite/23_containers/vector/ext_pointer/explicit_instantiation/3.cc:
1274         Likewise.
1275         * testsuite/23_containers/vector/requirements/explicit_instantiation/3.cc:
1276         Likewise.
1277
1278 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
1279
1280         * include/bits/boost_concept_check.h (_ForwardIteratorConcept)
1281         (_BidirectionalIteratorConcept, _RandomAccessIteratorConcept):
1282         Check result types of iterator operations.
1283         (_Mutable_ForwardIteratorConcept): Check that iterator's
1284         reference type is a reference to its value type.
1285         (_Mutable_BidirectionalIteratorConcept): Do not require the
1286         value type to be assignable.
1287         (_Mutable_RandomAccessIteratorConcept): Likewise.
1288         * testsuite/24_iterators/operations/prev_neg.cc: Adjust dg-error
1289         line number.
1290
1291 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
1292
1293         * testsuite/25_algorithms/copy/34595.cc: Add missing operation
1294         for type used as an iterator.
1295         * testsuite/25_algorithms/unique_copy/check_type.cc: Likewise.
1296
1297 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
1298
1299         * testsuite/20_util/is_nothrow_swappable/value.h: Use custom
1300         comparison function for priority_queue of type with no
1301         relational operators.
1302         * testsuite/20_util/is_swappable/value.h: Likewise.
1303         * testsuite/24_iterators/output/concept.cc: Add operator< to
1304         type used in set.
1305
1306 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
1307
1308         * include/bits/boost_concept_check.h (_OutputIteratorConcept):
1309         Use a function to preserve value category of the type.
1310         * include/bits/stl_algobase.h (copy, move, fill_n): Use a
1311         reference as the second argument for _OutputIteratorConcept.
1312         (copy_backward, move_backward): Use _OutputIteratorConcept
1313         instead of _ConvertibleConcept.
1314
1315 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
1316
1317         * include/bits/stl_iterator.h (pointer_traits): Define partial
1318         specialization for __normal_iterator.
1319         * testsuite/24_iterators/normal_iterator/to_address.cc: New test.
1320
1321 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
1322
1323         * include/bits/move.h (forward(remove_reference_t<T>&&)):
1324         Improve text of static_assert.
1325         * testsuite/20_util/forward/c_neg.cc: Adjust dg-error.
1326         * testsuite/20_util/forward/f_neg.cc: Likewise.
1327
1328 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
1329
1330         PR libstdc++/102499
1331         * include/bits/fs_path.h (path::begin, path::end): Add noexcept
1332         to declarations, to match definitions.
1333
1334 2021-09-24  Jonathan Wakely  <jwakely@redhat.com>
1335
1336         * include/bits/range_access.h (cbegin, cend): Remove redundant
1337         'inline' specifier.
1338
1339 2021-09-23  Jonathan Wakely  <jwakely@redhat.com>
1340
1341         * testsuite/20_util/specialized_algorithms/memory_management_tools/destroy_neg.cc:
1342         Remove dg-error lines for C++20-only errors.
1343
1344 2021-09-23  Jonathan Wakely  <jwakely@redhat.com>
1345
1346         * testsuite/19_diagnostics/headers/system_error/93151.cc:
1347         Disable PCH.
1348
1349 2021-09-23  Jonathan Wakely  <jwakely@redhat.com>
1350
1351         * src/c++11/system_error.cc (system_error_category) [_WIN32]:
1352         Map Windows error codes to generic POSIX error numbers. Use
1353         FormatMessage instead of strerror.
1354         * testsuite/19_diagnostics/error_category/system_category.cc:
1355         Adjust for new behaviour on Windows.
1356
1357 2021-09-23  Jonathan Wakely  <jwakely@redhat.com>
1358
1359         * src/c++11/system_error.cc (generic_error_category): Define
1360         class and virtual functions as 'final'.
1361         (generic_error_category::equivalent(int, const error_condition&)):
1362         Override.
1363         (system_error_category): Define class and virtual functions as
1364         'final'.
1365         (system_error_category::equivalent(int, const error_condition&)):
1366         Override.
1367         (generic_category_instance, system_category_instance): Use
1368         constinit union to make the objects immortal.
1369
1370 2021-09-23  Jonathan Wakely  <jwakely@redhat.com>
1371
1372         PR libstdc++/102425
1373         * src/c++11/system_error.cc
1374         (system_error_category::default_error_condition): Add 0 to
1375         switch.
1376         * testsuite/19_diagnostics/error_category/102425.cc: New test.
1377
1378 2021-09-17  Jonathan Wakely  <jwakely@redhat.com>
1379
1380         * include/bits/fs_path.h (path::iterator): Add noexcept to all
1381         member functions and friend functions.
1382         (distance): Add noexcept.
1383         (advance): Add noexcept and inline.
1384         * include/experimental/bits/fs_path.h (path::iterator):
1385         Add noexcept to all member functions.
1386
1387 2021-09-17  Jonathan Wakely  <jwakely@redhat.com>
1388
1389         PR libstdc++/102270
1390         * include/std/tuple (_Tuple_impl): Add constexpr to constructor
1391         missed in previous patch.
1392         * testsuite/20_util/tuple/cons/102270.C: Moved to...
1393         * testsuite/20_util/tuple/cons/102270.cc: ...here.
1394         * testsuite/util/testsuite_allocator.h (SimpleAllocator): Add
1395         constexpr to constructor so it can be used for C++20 tests.
1396
1397 2021-09-17  Jonathan Wakely  <jwakely@redhat.com>
1398
1399         * testsuite/26_numerics/valarray/dr630-3.C: Moved to...
1400         * testsuite/26_numerics/valarray/dr630-3.cc: ...here.
1401         * testsuite/27_io/basic_iostream/cons/16251.C: Moved to...
1402         * testsuite/27_io/basic_iostream/cons/16251.cc: ...here.
1403
1404 2021-09-16  Jonathan Wakely  <jwakely@redhat.com>
1405
1406         * src/Makefile.am (stamp-debug): Add all Makefiles as
1407         prerequisites.
1408         * src/Makefile.in: Regenerate.
1409
1410 2021-09-16  Jonathan Wakely  <jwakely@redhat.com>
1411
1412         * testsuite/ext/pb_ds/regression/tree_map_rand.cc: Increase
1413         timeout factor to 3.
1414         * testsuite/ext/pb_ds/regression/tree_set_rand.cc: Likewise.
1415
1416 2021-09-16  Jonathan Wakely  <jwakely@redhat.com>
1417
1418         * doc/xml/manual/using.xml: Generalize to apply to more than
1419         just -std=c++11.
1420         * doc/html/manual/using_macros.html: Regenerate.
1421
1422 2021-09-16  Jonathan Wakely  <jwakely@redhat.com>
1423
1424         * include/std/optional (nullptr_t): Make constructor noexcept.
1425
1426 2021-09-16  Jonathan Wakely  <jwakely@redhat.com>
1427
1428         * include/bits/fs_path.h (advance): Remove non-deducible
1429         template parameter.
1430
1431 2021-09-16  Jonathan Wakely  <jwakely@redhat.com>
1432
1433         PR libstdc++/102270
1434         * include/std/tuple (_Head_base, _Tuple_impl): Add
1435         _GLIBCXX20_CONSTEXPR to allocator-extended constructors.
1436         (tuple<>::swap(tuple&)): Add _GLIBCXX20_CONSTEXPR.
1437         * testsuite/20_util/tuple/cons/102270.C: New test.
1438
1439 2021-09-16  Jonathan Wakely  <jwakely@redhat.com>
1440
1441         PR libstdc++/102280
1442         * include/std/span (span(Range&&)): Add constraint to deduction
1443         guide.
1444
1445 2021-09-16  Jonathan Wakely  <jwakely@redhat.com>
1446
1447         * src/c++98/Makefile.am: Use CXXCOMPILE not LTCXXCOMPILE.
1448         * src/c++98/Makefile.in: Regenerate.
1449
1450 2021-09-16  Jonathan Wakely  <jwakely@redhat.com>
1451
1452         * include/bits/basic_string.h [_GLIBCXX_USE_CXX11_ABI]
1453         (to_string): Add noexcept if the type width is 32 bits or less.
1454
1455 2021-09-16  Jonathan Wakely  <jwakely@redhat.com>
1456
1457         * include/bits/unique_ptr.h (__uniq_ptr_impl::_M_ptr)
1458         (__uniq_ptr_impl::_M_deleter): Add noexcept.
1459
1460 2021-09-16  Thomas Rodgers  <rodgert@twrodgers.com>
1461
1462         PR libstdc++/101761
1463         * testsuite/29_atomics/atomic_ref/wait_notify.cc (test): Use
1464         va and vb as arguments to wait/notify, remove unused bb local.
1465
1466 2021-09-15  Hugo Beauzée-Luyssen  <hugo@beauzee.fr>
1467
1468         * crossconfig.m4: Check for TLS support on mingw.
1469         * configure: Regenerate.
1470
1471 2021-09-13  Jason Merrill  <jason@redhat.com>
1472
1473         * include/std/version: Define __cpp_lib_hardware_interference_size.
1474         * libsupc++/new: Define hardware interference size variables.
1475
1476 2021-09-10  Jonathan Wakely  <jwakely@redhat.com>
1477
1478         * testsuite/experimental/net/internet/resolver/ops/lookup.cc:
1479         Fix invalid hostname to only match the .invalid TLD.
1480
1481 2021-09-02  Jonathan Wakely  <jwakely@redhat.com>
1482
1483         * include/bits/atomic_base.h (__atomic_base<P*>::compare_exchange_weak):
1484         Add new functions.
1485         * include/std/atomic (atomic<T*>::compare_exchange_weak): Use
1486         it.
1487
1488 2021-09-02  Jonathan Wakely  <jwakely@redhat.com>
1489
1490         * include/std/atomic: Tweak whitespace.
1491
1492 2021-09-02  Jonathan Wakely  <jwakely@redhat.com>
1493
1494         PR c++/102177
1495         * include/bits/atomic_base.h (__is_valid_cmpexch_failure_order):
1496         New function to check if a memory order is valid for the failure
1497         case of compare exchange operations.
1498         (__atomic_base<I>::compare_exchange_weak): Simplify assertions
1499         by using __is_valid_cmpexch_failure_order.
1500         (__atomic_base<I>::compare_exchange_strong): Likewise.
1501         (__atomic_base<P*>::compare_exchange_weak): Likewise.
1502         (__atomic_base<P*>::compare_exchange_strong): Likewise.
1503         (__atomic_impl::compare_exchange_weak): Add assertion.
1504         (__atomic_impl::compare_exchange_strong): Likewise.
1505         * include/std/atomic (atomic::compare_exchange_weak): Likewise.
1506         (atomic::compare_exchange_strong): Likewise.
1507
1508 2021-09-02  Jonathan Wakely  <jwakely@redhat.com>
1509
1510         * include/std/functional (invoke_r): Define.
1511         * include/std/version (__cpp_lib_invoke_r): Define.
1512         * testsuite/20_util/function_objects/invoke/version.cc: Check
1513         for __cpp_lib_invoke_r as well as __cpp_lib_invoke.
1514         * testsuite/20_util/function_objects/invoke/4.cc: New test.
1515
1516 2021-08-31  Jonathan Wakely  <jwakely@redhat.com>
1517
1518         PR libstdc++/98421
1519         * include/std/span (span(Iter, size_type), span(Iter, Iter)):
1520         Add valid range checks.
1521         * testsuite/23_containers/span/cons_1_assert_neg.cc: New test.
1522         * testsuite/23_containers/span/cons_2_assert_neg.cc: New test.
1523
1524 2021-08-31  Jonathan Wakely  <jwakely@redhat.com>
1525
1526         * configure.ac: Fix checks for F_GETFL, F_SETFL and O_NONBLOCK.
1527         * configure: Regenerate.
1528
1529 2021-08-31  Jonathan Wakely  <jwakely@redhat.com>
1530
1531         * src/c++11/system_error.cc (error_category::~error_category()):
1532         Remove noexcept-specifier.
1533         (system_error::~system_error()): Likewise.
1534         * testsuite/19_diagnostics/error_category/noexcept.cc: New test.
1535         * testsuite/19_diagnostics/system_error/noexcept.cc: New test.
1536
1537 2021-08-31  Jonathan Wakely  <jwakely@redhat.com>
1538
1539         PR libstdc++/102074
1540         * include/bits/atomic_timed_wait.h (__timed_waiter_pool)
1541         [!_GLIBCXX_HAVE_PLATFORM_TIMED_WAIT]: Add missing return.
1542
1543 2021-08-31  Jonathan Wakely  <jwakely@redhat.com>
1544
1545         * include/experimental/internet (__make_resolver_error_code):
1546         Handle EAI_SYSTEM errors.
1547         (basic_resolver_results): Use __make_resolver_error_code. Use
1548         Glibc NI_MAXHOST and NI_MAXSERV values for buffer sizes.
1549
1550 2021-08-31  Jonathan Wakely  <jwakely@redhat.com>
1551
1552         * testsuite/experimental/net/internet/resolver/ops/lookup.cc:
1553         Try other service if "http" fails.
1554
1555 2021-08-31  Jonathan Wakely  <jwakely@redhat.com>
1556
1557         * testsuite/17_intro/names.cc: Undefine some more names used
1558         by Solaris system headers.
1559
1560 2021-08-30  Jason Merrill  <jason@redhat.com>
1561
1562         PR c++/96286
1563         * testsuite/30_threads/promise/requirements/lwg3466.cc:
1564         Remove dg-prune-outputs.
1565
1566 2021-08-28  Jonathan Wakely  <jwakely@redhat.com>
1567
1568         * include/bits/alloc_traits.h (allocator_traits): Add explicit
1569         specialization for allocator<void>. Improve doxygen comments.
1570         * include/bits/allocator.h (allocator<void>): Restore for the
1571         versioned namespace.
1572         (allocator<void>::construct, allocator<void>::destroy): Remove.
1573         * include/ext/extptr_allocator.h (_Extptr_allocator<void>):
1574         Add default constructor and converting constructor.
1575
1576 2021-08-28  Jonathan Wakely  <jwakely@redhat.com>
1577
1578         * include/bits/stl_uninitialized.h: Fix typo in comment.
1579
1580 2021-08-28  Jonathan Wakely  <jwakely@redhat.com>
1581
1582         PR libstdc++/99876
1583         * src/c++17/fs_ops.cc (fs::absolute): Call non-throwing form,
1584         to avoid unnecessary current_path() call.
1585
1586 2021-08-28  Jonathan Wakely  <jwakely@redhat.com>
1587
1588         * include/bits/std_function.h (function::function(F&&)): Give
1589         name to defaulted template parameter, to improve diagnostics.
1590         Use markdown for more doxygen comments.
1591
1592 2021-08-26  Jonathan Wakely  <jwakely@redhat.com>
1593
1594         * include/bits/std_function.h (function): Adjust doxygen
1595         comments.
1596         * include/bits/unique_ptr.h (make_unique_for_overwrite):
1597         Change parameter name to match doxygen comment.
1598
1599 2021-08-26  Jonathan Wakely  <jwakely@redhat.com>
1600
1601         * include/bits/std_function.h (_function_base::_Base_manager):
1602         Replace _M_init_functor with a function template using a
1603         forwarding reference, and a pair of _M_create function
1604         templates. Reuse _M_create for the clone operation.
1605         (function::_Decay_t): New alias template.
1606         (function::_Callable): Simplify by using _Decay.
1607         (function::function(F)): Change parameter to forwarding
1608         reference, as per LWG 2447. Add noexcept-specifier. Simplify
1609         constraints.
1610         (function::operator=(F&&)): Add noexcept-specifier.
1611         * testsuite/20_util/function/cons/lwg2774.cc: New test.
1612         * testsuite/20_util/function/cons/noexcept.cc: New test.
1613
1614 2021-08-26  Jonathan Wakely  <jwakely@redhat.com>
1615
1616         * include/bits/std_function.h (function::function(F)): Add
1617         static assertions to check constructibility requirements.
1618
1619 2021-08-26  Jonathan Wakely  <jwakely@redhat.com>
1620
1621         PR libstdc++/100285
1622         * configure.ac: Check for O_NONBLOCK.
1623         * configure: Regenerate.
1624         * include/experimental/internet: Include <ws2tcpip.h> for
1625         Windows.  Use preprocessor conditions around more constants.
1626         * include/experimental/socket: Use preprocessor conditions
1627         around more constants.
1628         * testsuite/experimental/net/internet/resolver/base.cc: Only use
1629         constants when the corresponding C macro is defined.
1630         * testsuite/experimental/net/socket/basic_socket.cc: Likewise.
1631         * testsuite/experimental/net/socket/socket_base.cc: Likewise.
1632         Make preprocessor checks more fine-grained.
1633
1634 2021-08-25  Jonathan Wakely  <jwakely@redhat.com>
1635
1636         * testsuite/17_intro/names.cc: Check 'sz'.
1637
1638 2021-08-25  Jonathan Wakely  <jwakely@redhat.com>
1639
1640         * testsuite/17_intro/names.cc: Adjust for Windows.
1641
1642 2021-08-25  Jonathan Wakely  <jwakely@redhat.com>
1643
1644         * include/std/valarray: Uglify 'func' parameters.
1645         * testsuite/17_intro/names.cc: Add 'func' to checks.
1646
1647 2021-08-25  Jonathan Wakely  <jwakely@redhat.com>
1648
1649         PR libstdc++/102064
1650         * include/bits/stl_uninitialized.h (_GLIBCXX_USE_ASSIGN_FOR_INIT):
1651         Define macro to check conditions for optimizing trivial cases.
1652         (__check_constructible): New function to do static assert.
1653         (uninitialized_copy, uninitialized_fill, uninitialized_fill_n):
1654         Use new macro.
1655         * testsuite/20_util/specialized_algorithms/uninitialized_copy/1.cc:
1656         Adjust dg-error pattern.
1657         * testsuite/23_containers/vector/cons/89164.cc: Likewise. Add
1658         C++17-specific checks from 89164_c++17.cc.
1659         * testsuite/23_containers/vector/cons/89164_c++17.cc: Removed.
1660         * testsuite/20_util/specialized_algorithms/uninitialized_copy/102064.cc:
1661         New test.
1662         * testsuite/20_util/specialized_algorithms/uninitialized_copy_n/102064.cc:
1663         New test.
1664         * testsuite/20_util/specialized_algorithms/uninitialized_fill/102064.cc:
1665         New test.
1666         * testsuite/20_util/specialized_algorithms/uninitialized_fill_n/102064.cc:
1667         New test.
1668
1669 2021-08-25  Jonathan Wakely  <jwakely@redhat.com>
1670
1671         PR libstdc++/102048
1672         * include/ext/rope (rope::erase(size_type)): Remove broken
1673         function.
1674
1675 2021-08-24  Jonathan Wakely  <jwakely@redhat.com>
1676
1677         * doc/xml/manual/status_cxx2020.xml: Update table.
1678         * doc/html/manual/status.html: Regenerate.
1679
1680 2021-08-24  Jonathan Wakely  <jwakely@redhat.com>
1681
1682         * include/std/type_traits (is_layout_compatible): Define.
1683         (is_corresponding_member): Define.
1684         * include/std/version (__cpp_lib_is_layout_compatible): Define.
1685         * testsuite/20_util/is_layout_compatible/is_corresponding_member.cc:
1686         New test.
1687         * testsuite/20_util/is_layout_compatible/value.cc: New test.
1688         * testsuite/20_util/is_layout_compatible/version.cc: New test.
1689         * testsuite/20_util/is_pointer_interconvertible/with_class.cc:
1690         New test.
1691         * testsuite/23_containers/span/layout_compat.cc: Do not use real
1692         std::is_layout_compatible trait if available.
1693
1694 2021-08-24  Jonathan Wakely  <jwakely@redhat.com>
1695
1696         * src/c++11/cxx11-shim_facets.cc: Fix mismatched class-key in
1697         explicit instantiation definitions.
1698
1699 2021-08-23  Jonathan Wakely  <jwakely@redhat.com>
1700
1701         * include/std/ranges (basic_istream_view): Add default template
1702         argument.
1703         * testsuite/std/ranges/istream_view.cc: Check it.
1704
1705 2021-08-23  Jonathan Wakely  <jwakely@redhat.com>
1706
1707         * libsupc++/dyncast.cc (__dynamic_cast): Add __builtin_expect to
1708         precondition check.
1709
1710 2021-08-23  Jonathan Wakely  <jwakely@redhat.com>
1711
1712         PR libstdc++/90787
1713         * testsuite/util/testsuite_fs.h (permissions_are_testable):
1714         Define as inline.
1715
1716 2021-08-20  Jonathan Wakely  <jwakely@redhat.com>
1717
1718         PR libstdc++/90787
1719         * testsuite/27_io/filesystem/iterators/directory_iterator.cc:
1720         Use new __gnu_test::permissions_are_testable() function.
1721         * testsuite/27_io/filesystem/iterators/recursive_directory_iterator.cc:
1722         Likewise.
1723         * testsuite/27_io/filesystem/operations/exists.cc: Likewise.
1724         * testsuite/27_io/filesystem/operations/is_empty.cc: Likewise.
1725         * testsuite/27_io/filesystem/operations/remove.cc: Likewise.
1726         * testsuite/27_io/filesystem/operations/remove_all.cc: Likewise.
1727         * testsuite/27_io/filesystem/operations/status.cc: Likewise.
1728         * testsuite/27_io/filesystem/operations/symlink_status.cc:
1729         Likewise.
1730         * testsuite/27_io/filesystem/operations/temp_directory_path.cc:
1731         Likewise.
1732         * testsuite/experimental/filesystem/iterators/directory_iterator.cc:
1733         Likewise.
1734         * testsuite/experimental/filesystem/iterators/recursive_directory_iterator.cc:
1735         Likewise.
1736         * testsuite/experimental/filesystem/operations/exists.cc:
1737         Likewise.
1738         * testsuite/experimental/filesystem/operations/is_empty.cc:
1739         Likewise.
1740         * testsuite/experimental/filesystem/operations/remove.cc:
1741         Likewise.
1742         * testsuite/experimental/filesystem/operations/remove_all.cc:
1743         Likewise.
1744         * testsuite/experimental/filesystem/operations/temp_directory_path.cc:
1745         Likewise.
1746         * testsuite/util/testsuite_fs.h (__gnu_test::permissions_are_testable):
1747         New function to guess whether testing permissions will work.
1748
1749 2021-08-19  Jonathan Wakely  <jwakely@redhat.com>
1750
1751         * doc/xml/manual/status_cxx2020.xml: Move row  earlier in table.
1752         * doc/html/manual/status.html: Regenerate.
1753
1754 2021-08-19  Jonathan Wakely  <jwakely@redhat.com>
1755
1756         * doc/doxygen/user.cfg.in: Update to Doxygen 1.9.2
1757
1758 2021-08-19  Jonathan Wakely  <jwakely@redhat.com>
1759
1760         PR libstdc++/101965
1761         * include/std/charconv (__to_chars_i): Remove redundant check.
1762
1763 2021-08-19  Jonathan Wakely  <jwakely@redhat.com>
1764
1765         PR libstdc++/101960
1766         * include/std/tuple (_Tuple_impl(_Tuple_impl&&)): Use base
1767         class' move constructor. Define as defaulted for versioned
1768         namespace.
1769         * testsuite/20_util/tuple/cons/101960.cc: New test.
1770
1771 2021-08-19  Jonathan Wakely  <jwakely@redhat.com>
1772
1773         PR libstdc++/100139
1774         * doc/xml/manual/status_cxx2020.xml: Add P1739R4 to status table.
1775         * doc/html/manual/status.html: Regenerate.
1776
1777 2021-08-19  Jonathan Wakely  <jwakely@redhat.com>
1778
1779         * include/bits/shared_ptr.h: Add @since and @headerfile tags.
1780         * include/bits/unique_ptr.h: Add @headerfile tags.
1781
1782 2021-08-19  Jonathan Wakely  <jwakely@redhat.com>
1783
1784         * src/filesystem/ops-common.h (filesystem::file_time): Improve
1785         overflow check by using system_clock::duration::max().
1786
1787 2021-08-19  Jonathan Wakely  <jwakely@redhat.com>
1788
1789         * include/bits/stl_tree.h: Tweak whitespace.
1790
1791 2021-08-18  Jonathan Wakely  <jwakely@redhat.com>
1792
1793         * include/bits/unique_ptr.h (default_delete): Add @since tag.
1794         (unique_ptr, unique_ptr<T[]>): Likewise. Improve @brief.
1795         (make_unique, make_unique_for_overwrite): Likewise. Add @tparam,
1796         @param, and @returns.
1797         (_MakeUniq): Move to __detail namespace. Add alias template
1798         helpers.
1799
1800 2021-08-18  Jonathan Wakely  <jwakely@redhat.com>
1801
1802         * include/bits/stl_function.h: Improve doxygen comments.
1803
1804 2021-08-18  Jonathan Wakely  <jwakely@redhat.com>
1805
1806         * doc/doxygen/user.cfg.in (PREDEFINED): Enable doxygen
1807         processing for C++20 components and components that depend on
1808         compiler features.
1809         * include/bits/stl_algo.h (random_shuffle): Use @deprecated.
1810         * include/std/type_traits: Improve doxygen comments for C++20
1811         traits.
1812
1813 2021-08-18  Jonathan Wakely  <jwakely@redhat.com>
1814
1815         * include/ext/type_traits.h (__promote_2, __promote_3)
1816         (__promote_4): Redfine as alias templates using __promoted_t.
1817         * include/std/complex (__promote_2): Remove partial
1818         specializations for std::complex.
1819
1820 2021-08-18  Jonathan Wakely  <jwakely@redhat.com>
1821
1822         * include/bits/stl_algo.h (min(initializer_list<T>))
1823         (min(initializer_list<T>, Compare)): Call __min_element directly to
1824         avoid redundant debug checks for valid ranges.
1825         (max(initializer_list<T>), max(initializer_list<T>, Compare)):
1826         Likewise, for __max_element.
1827         (minmax(initializer_list<T>), minmax(initializer_list<T>, Compare)):
1828         Likewise, for __minmax_element.
1829
1830 2021-08-18  Jonathan Wakely  <jwakely@redhat.com>
1831
1832         * include/debug/deque (deque(size_type, const T&, const A&)):
1833         Prevent class template argument deduction and replace with a
1834         deduction guide.
1835         * include/debug/forward_list (forward_list(size_type, const T&, const A&)):
1836         Likewise.
1837         * include/debug/list (list(size_type, const T&, const A&)):
1838         Likewise.
1839         * include/debug/vector (vector(size_type, const T&, const A&)):
1840         Likewise.
1841
1842 2021-08-18  Jonathan Wakely  <jwakely@redhat.com>
1843
1844         * python/libstdcxx/v6/printers.py (StdBitReferencePrinter): Use
1845         'std::vector<bool>::reference' as type name, not _Bit_reference.
1846         (build_libstdcxx_dictionary): Register printers for vector<bool>
1847         types in debug mode too.
1848         * testsuite/libstdc++-prettyprinters/simple.cc: Adjust expected
1849         output for invalid _Bit_reference. Use vector<bool>::reference
1850         instead of _Bit_reference.
1851         * testsuite/libstdc++-prettyprinters/simple11.cc: Likewise.
1852
1853 2021-08-17  Thomas Schwinge  <thomas@codesourcery.com>
1854
1855         * testsuite/lib/libstdc++.exp: Avoid illegal argument to verbose,
1856         continued.
1857
1858 2021-08-17  Luc Michel  <lmichel@kalray.eu>
1859             Marc Poulhies  <mpoulhies@kalrayinc.com>
1860
1861         * testsuite/lib/gdb-test.exp (gdb_version_check)
1862         (gdb_version_check_xmethods): Only check the GDB version for
1863         local native targets.
1864
1865 2021-08-17  Antony Polukhin  <antoshkka@gmail.com>
1866             Jonathan Wakely  <jwakely@redhat.com>
1867
1868         * include/bits/random.tcc (seed_seq::seed_seq): Reserve capacity
1869         if distance is O(1).
1870         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error
1871         line number.
1872
1873 2021-08-17  Jonathan Wakely  <jwakely@redhat.com>
1874
1875         * testsuite/26_numerics/random/seed_seq/cons/range.cc: Check
1876         construction from input iterators.
1877
1878 2021-08-17  Jonathan Wakely  <jwakely@redhat.com>
1879
1880         * python/libstdcxx/v6/printers.py (StdErrorCatPrinter): Remove.
1881
1882 2021-08-17  Jonathan Wakely  <jwakely@redhat.com>
1883
1884         PR libstdc++/101923
1885         * include/bits/std_function.h (function(function&&)): Check for
1886         non-empty parameter before doing any work.
1887
1888 2021-08-17  Jonathan Wakely  <jwakely@redhat.com>
1889
1890         * include/bits/cow_string.h (basic_string::contains): Do not
1891         define for -std=gnu++20.
1892
1893 2021-08-17  Jonathan Wakely  <jwakely@redhat.com>
1894
1895         * include/bits/ranges_util.h (__not_same_as): Rename to
1896         __different_from.
1897         * include/std/ranges (__not_same_as): Likewise.
1898
1899 2021-08-17  Jonathan Wakely  <jwakely@redhat.com>
1900
1901         * include/std/utility (exchange): Add noexcept-specifier.
1902         * testsuite/20_util/exchange/noexcept.cc: New test.
1903
1904 2021-08-17  Jonathan Wakely  <jwakely@redhat.com>
1905
1906         * python/libstdcxx/v6/printers.py (StdErrorCodePrinter): Define.
1907         (build_libstdcxx_dictionary): Register printer for
1908         std::error_code and std::error_condition.
1909         * testsuite/libstdc++-prettyprinters/cxx11.cc: Test it.
1910
1911 2021-08-16  Jonathan Wakely  <jwakely@redhat.com>
1912
1913         PR libstdc++/101937
1914         * src/c++11/debug.cc (PrintContext::_M_indent): Replace with a
1915         static data member.
1916         (print_word): Use qualified-id to access it.
1917
1918 2021-08-16  Jonathan Wakely  <jwakely@redhat.com>
1919
1920         * python/Makefile.am [GLIBCXX_BUILD_DEBUG] (install-data-local):
1921         Install another copy of the GDB hook.
1922         * python/Makefile.in: Regenerate.
1923
1924 2021-08-12  Jonathan Wakely  <jwakely@redhat.com>
1925
1926         PR libstdc++/101870
1927         * include/c_global/cmath (hypot): Use __promoted_t.
1928         (lerp): Add new overload accepting any arithmetic types.
1929         * include/ext/type_traits.h (__promoted_t): New alias template.
1930         * testsuite/26_numerics/lerp.cc: Moved to...
1931         * testsuite/26_numerics/lerp/1.cc: ...here.
1932         * testsuite/26_numerics/lerp/constexpr.cc: New test.
1933         * testsuite/26_numerics/lerp/version.cc: New test.
1934
1935 2021-08-12  Jonathan Wakely  <jwakely@redhat.com>
1936
1937         * testsuite/26_numerics/lerp.cc: Add header name to #error.
1938         * testsuite/26_numerics/midpoint/integral.cc: Likewise.
1939         * testsuite/26_numerics/midpoint/version.cc: New test.
1940
1941 2021-08-12  Jonathan Wakely  <jwakely@redhat.com>
1942
1943         * include/experimental/random (experimental::randint): Add
1944         nodiscard attribute.
1945
1946 2021-08-12  Jonathan Wakely  <jwakely@redhat.com>
1947
1948         * src/c++98/locale_init.cc: Require C++11.
1949         * src/c++98/localename.cc: Likewise.
1950         * src/c++98/misc-inst.cc: Require C++98.
1951
1952 2021-08-11  Jonathan Wakely  <jwakely@redhat.com>
1953
1954         PR libstdc++/101866
1955         * testsuite/experimental/random/randint.cc: Loop and retry if
1956         reseed() produces the same sequence.
1957
1958 2021-08-11  Jonathan Wakely  <jwakely@redhat.com>
1959
1960         * include/std/type_traits (__cpp_lib_is_pointer_interconvertible)
1961         (is_pointer_interconvertible_base_of_v)
1962         (is_pointer_interconvertible_base_of): Define for C++20.
1963         * include/std/version (__cpp_lib_is_pointer_interconvertible):
1964         Define.
1965         * testsuite/23_containers/span/layout_compat.cc: Use correct
1966         feature test macro for std::is_layout_compatible_v.
1967         * testsuite/20_util/is_pointer_interconvertible/value.cc: New test.
1968         * testsuite/20_util/is_pointer_interconvertible/version.cc: New test.
1969
1970 2021-08-09  Jonathan Wakely  <jwakely@redhat.com>
1971
1972         * include/bits/regex.h (basic_regex::transform_primary): Use
1973         _GLIBCXX_STD_C::vector for local variable.
1974         * include/bits/regex.tcc (__regex_algo_impl): Use reference to
1975         _GLIBCXX_STD_C::vector base class of match_results.
1976         * include/bits/regex_automaton.tcc (_StateSeq:_M_clone): Use
1977         _GLIBCXX_STD_C::map and _GLIBCXX_STD_C::deque for local
1978         variables.
1979         * include/bits/regex_compiler.h (_BracketMatcher): Use
1980         _GLIBCXX_STD_C::vector for data members.
1981         * include/bits/regex_executor.h (_Executor): Likewise.
1982         * include/std/regex [_GLIBCXX_DEBUG]: Include <debug/vector>.
1983
1984 2021-08-09  François Dumont  <fdumont@gcc.gnu.org>
1985
1986         * include/debug/safe_container.h
1987         (_Safe_container(_Safe_container&&, const _Alloc&, std::true_type)): New.
1988         (_Safe_container(_Safe_container&&, const _Alloc&, std::false_type)): New.
1989         (_Safe_container(_Safe_container&&, const _Alloc&)): Use latters.
1990
1991 2021-08-09  Jonathan Wakely  <jwakely@redhat.com>
1992
1993         * testsuite/23_containers/unordered_map/cons/default.cc: Add
1994         equality comparison operators to allocator.
1995         * testsuite/23_containers/unordered_set/cons/default.cc:
1996         Likewise.
1997
1998 2021-08-08  François Dumont  <fdumont@gcc.gnu.org>
1999
2000         * testsuite/25_algorithms/copy/debug/constexpr_neg.cc: Replace 'failed_assertion'
2001         dg-prune-output reason with 'builtin_unreachable'.
2002         * testsuite/25_algorithms/copy_backward/debug/constexpr_neg.cc: Likewise.
2003         * testsuite/25_algorithms/equal/debug/constexpr_neg.cc: Likewise.
2004         * testsuite/25_algorithms/lower_bound/debug/constexpr_partitioned_neg.cc: Likewise.
2005         * testsuite/25_algorithms/lower_bound/debug/constexpr_partitioned_pred_neg.cc: Likewise.
2006         * testsuite/25_algorithms/lower_bound/debug/constexpr_valid_range_neg.cc: Likewise.
2007         * testsuite/25_algorithms/upper_bound/debug/constexpr_partitioned_neg.cc: Likewise.
2008         * testsuite/25_algorithms/upper_bound/debug/constexpr_partitioned_pred_neg.cc: Likewise.
2009         * testsuite/25_algorithms/upper_bound/debug/constexpr_valid_range_neg.cc: Likewise.
2010
2011 2021-08-08  Hans-Peter Nilsson  <hp@bitrange.com>
2012
2013         * testsuite/std/ranges/iota/max_size_type.cc: Set
2014         dg-timeout-factor to 4.
2015
2016 2021-08-06  Jonathan Wakely  <jwakely@redhat.com>
2017
2018         * libsupc++/compare (compare_three_way, strong_order)
2019         (weak_order, partial_order, compare_strong_order_fallback)
2020         (compare_weak_order_fallback, compare_partial_order_fallback):
2021         Move nodiscard attributes to correct location.
2022
2023 2021-08-05  Jonathan Wakely  <jwakely@redhat.com>
2024
2025         PR libstdc++/101782
2026         * include/bits/ranges_base.h (ranges::begin, ranges::end)
2027         (ranges::rbegin, ranges::rend, ranges::size, ranges::ssize)
2028         (ranges::empty, ranges::data): Move attribute after the
2029         declarator-id instead of at the end of the declarator.
2030         * include/bits/stl_iterator.h (__gnu_cxx::__normal_iterator):
2031         Move attributes back to the start of the function declarator,
2032         but move the requires-clause to the end.
2033         (common_iterator): Move attribute after the declarator-id.
2034         * include/bits/stl_queue.h (queue): Remove ill-formed attributes
2035         from friend declaration that are not definitions.
2036         * include/std/ranges (views::all, views::filter)
2037         (views::transform, views::take, views::take_while,
2038         views::drop) (views::drop_while, views::join,
2039         views::lazy_split) (views::split, views::counted,
2040         views::common, views::reverse) (views::elements): Move
2041         attributes after the declarator-id.
2042
2043 2021-08-05  Jonathan Wakely  <jwakely@redhat.com>
2044
2045         * libsupc++/compare (partial_ordering, weak_ordering)
2046         (strong_ordering, is_eq, is_neq, is_lt, is_lteq, is_gt, is_gteq)
2047         (compare_three_way, strong_order, weak_order, partial_order)
2048         (compare_strong_order_fallback, compare_weak_order_fallback)
2049         (compare_partial_order_fallback, __detail::__synth3way): Add
2050         nodiscard attribute.
2051         * testsuite/18_support/comparisons/categories/zero_neg.cc: Add
2052         -Wno-unused-result to options.
2053
2054 2021-08-05  Jonathan Wakely  <jwakely@redhat.com>
2055
2056         PR libstdc++/101782
2057         * include/bits/ranges_base.h (ranges::begin, ranges::end)
2058         (ranges::rbegin, ranges::rend, ranges::size, ranges::ssize)
2059         (ranges::empty, ranges::data): Move attribute to the end of
2060         the declarator.
2061         * include/bits/stl_iterator.h (__gnu_cxx::__normal_iterator)
2062         (common_iterator): Likewise for non-member operator functions.
2063         * include/std/ranges (views::all, views::filter)
2064         (views::transform, views::take, views::take_while, views::drop)
2065         (views::drop_while, views::join, views::lazy_split)
2066         (views::split, views::counted, views::common, views::reverse)
2067         (views::elements): Likewise.
2068         * testsuite/std/ranges/access/101782.cc: New test.
2069
2070 2021-08-04  Jonathan Wakely  <jwakely@redhat.com>
2071
2072         * include/bits/forward_list.h: Add [[nodiscard]] to functions
2073         with no side-effects.
2074         * include/bits/stl_bvector.h: Likewise.
2075         * include/bits/stl_deque.h: Likewise.
2076         * include/bits/stl_list.h: Likewise.
2077         * include/bits/stl_queue.h: Likewise.
2078         * include/bits/stl_stack.h: Likewise.
2079         * include/bits/stl_vector.h: Likewise.
2080         * include/debug/deque: Likewise.
2081         * include/debug/forward_list: Likewise.
2082         * include/debug/list: Likewise.
2083         * include/debug/safe_iterator.h: Likewise.
2084         * include/debug/vector: Likewise.
2085         * include/std/array: Likewise.
2086         * testsuite/23_containers/array/creation/3_neg.cc: Use
2087         -Wno-unused-result.
2088         * testsuite/23_containers/array/debug/back1_neg.cc: Cast result
2089         to void.
2090         * testsuite/23_containers/array/debug/back2_neg.cc: Likewise.
2091         * testsuite/23_containers/array/debug/front1_neg.cc: Likewise.
2092         * testsuite/23_containers/array/debug/front2_neg.cc: Likewise.
2093         * testsuite/23_containers/array/debug/square_brackets_operator1_neg.cc:
2094         Likewise.
2095         * testsuite/23_containers/array/debug/square_brackets_operator2_neg.cc:
2096         Likewise.
2097         * testsuite/23_containers/array/tuple_interface/get_neg.cc:
2098         Adjust dg-error line numbers.
2099         * testsuite/23_containers/deque/cons/clear_allocator.cc: Cast
2100         result to void.
2101         * testsuite/23_containers/deque/debug/invalidation/4.cc:
2102         Likewise.
2103         * testsuite/23_containers/deque/types/1.cc: Use
2104         -Wno-unused-result.
2105         * testsuite/23_containers/list/types/1.cc: Cast result to void.
2106         * testsuite/23_containers/priority_queue/members/7161.cc:
2107         Likewise.
2108         * testsuite/23_containers/queue/members/7157.cc: Likewise.
2109         * testsuite/23_containers/vector/59829.cc: Likewise.
2110         * testsuite/23_containers/vector/ext_pointer/types/1.cc:
2111         Likewise.
2112         * testsuite/23_containers/vector/ext_pointer/types/2.cc:
2113         Likewise.
2114         * testsuite/23_containers/vector/types/1.cc: Use
2115         -Wno-unused-result.
2116
2117 2021-08-04  Jonathan Wakely  <jwakely@redhat.com>
2118
2119         * include/bits/iterator_concepts.h (iter_move): Add
2120         [[nodiscard]].
2121         * include/bits/range_access.h (begin, end, cbegin, cend)
2122         (rbegin, rend, crbegin, crend, size, data, ssize): Likewise.
2123         * include/bits/ranges_base.h (ranges::begin, ranges::end)
2124         (ranges::cbegin, ranges::cend, ranges::rbegin, ranges::rend)
2125         (ranges::crbegin, ranges::crend, ranges::size, ranges::ssize)
2126         (ranges::empty, ranges::data, ranges::cdata): Likewise.
2127         * include/bits/stl_iterator.h (reverse_iterator, __normal_iterator)
2128         (back_insert_iterator, front_insert_iterator, insert_iterator)
2129         (move_iterator, move_sentinel, common_iterator)
2130         (counted_iterator): Likewise.
2131         * include/bits/stl_iterator_base_funcs.h (distance, next, prev):
2132         Likewise.
2133         * include/bits/stream_iterator.h (istream_iterator)
2134         (ostream_iterartor): Likewise.
2135         * include/bits/streambuf_iterator.h (istreambuf_iterator)
2136         (ostreambuf_iterator): Likewise.
2137         * include/std/ranges (views::single, views::iota, views::all)
2138         (views::filter, views::transform, views::take, views::take_while)
2139         (views::drop, views::drop_while, views::join, views::lazy_split)
2140         (views::split, views::counted, views::common, views::reverse)
2141         (views::elements): Likewise.
2142         * testsuite/20_util/rel_ops.cc: Use -Wno-unused-result.
2143         * testsuite/24_iterators/move_iterator/greedy_ops.cc: Likewise.
2144         * testsuite/24_iterators/normal_iterator/greedy_ops.cc:
2145         Likewise.
2146         * testsuite/24_iterators/reverse_iterator/2.cc: Likewise.
2147         * testsuite/24_iterators/reverse_iterator/greedy_ops.cc:
2148         Likewise.
2149         * testsuite/21_strings/basic_string/range_access/char/1.cc:
2150         Cast result to void.
2151         * testsuite/21_strings/basic_string/range_access/wchar_t/1.cc:
2152         Likewise.
2153         * testsuite/21_strings/basic_string_view/range_access/char/1.cc:
2154         Likewise.
2155         * testsuite/21_strings/basic_string_view/range_access/wchar_t/1.cc:
2156         Likewise.
2157         * testsuite/23_containers/array/range_access.cc: Likewise.
2158         * testsuite/23_containers/deque/range_access.cc: Likewise.
2159         * testsuite/23_containers/forward_list/range_access.cc:
2160         Likewise.
2161         * testsuite/23_containers/list/range_access.cc: Likewise.
2162         * testsuite/23_containers/map/range_access.cc: Likewise.
2163         * testsuite/23_containers/multimap/range_access.cc: Likewise.
2164         * testsuite/23_containers/multiset/range_access.cc: Likewise.
2165         * testsuite/23_containers/set/range_access.cc: Likewise.
2166         * testsuite/23_containers/unordered_map/range_access.cc:
2167         Likewise.
2168         * testsuite/23_containers/unordered_multimap/range_access.cc:
2169         Likewise.
2170         * testsuite/23_containers/unordered_multiset/range_access.cc:
2171         Likewise.
2172         * testsuite/23_containers/unordered_set/range_access.cc:
2173         Likewise.
2174         * testsuite/23_containers/vector/range_access.cc: Likewise.
2175         * testsuite/24_iterators/customization_points/iter_move.cc:
2176         Likewise.
2177         * testsuite/24_iterators/istream_iterator/sentinel.cc:
2178         Likewise.
2179         * testsuite/24_iterators/istreambuf_iterator/sentinel.cc:
2180         Likewise.
2181         * testsuite/24_iterators/move_iterator/dr2061.cc: Likewise.
2182         * testsuite/24_iterators/operations/prev_neg.cc: Likewise.
2183         * testsuite/24_iterators/ostreambuf_iterator/2.cc: Likewise.
2184         * testsuite/24_iterators/range_access/range_access.cc:
2185         Likewise.
2186         * testsuite/24_iterators/range_operations/100768.cc: Likewise.
2187         * testsuite/26_numerics/valarray/range_access2.cc: Likewise.
2188         * testsuite/28_regex/range_access.cc: Likewise.
2189         * testsuite/experimental/string_view/range_access/char/1.cc:
2190         Likewise.
2191         * testsuite/experimental/string_view/range_access/wchar_t/1.cc:
2192         Likewise.
2193         * testsuite/ext/vstring/range_access.cc: Likewise.
2194         * testsuite/std/ranges/adaptors/take.cc: Likewise.
2195         * testsuite/std/ranges/p2259.cc: Likewise.
2196
2197 2021-08-03  Jonathan Wakely  <jwakely@redhat.com>
2198
2199         * include/bits/random.tcc (linear_congruential_engine): Do not
2200         define static constexpr members when they are implicitly inline.
2201         * include/std/ratio (ratio, __ratio_multiply, __ratio_divide)
2202         (__ratio_add, __ratio_subtract): Likewise.
2203         * include/std/type_traits (integral_constant): Likewise.
2204         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error
2205         line number.
2206
2207 2021-08-03  Jonathan Wakely  <jwakely@redhat.com>
2208
2209         * testsuite/util/testsuite_common_types.h: Replace uses of
2210         tr1::unordered_map and tr1::unordered_set with their C++11
2211         equivalents.
2212         * testsuite/29_atomics/atomic/cons/assign_neg.cc: Adjust
2213         dg-error line number.
2214         * testsuite/29_atomics/atomic/cons/copy_neg.cc: Likewise.
2215         * testsuite/29_atomics/atomic_integral/cons/assign_neg.cc:
2216         Likewise.
2217         * testsuite/29_atomics/atomic_integral/cons/copy_neg.cc:
2218         Likewise.
2219         * testsuite/29_atomics/atomic_integral/operators/bitwise_neg.cc:
2220         Likewise.
2221         * testsuite/29_atomics/atomic_integral/operators/decrement_neg.cc:
2222         Likewise.
2223         * testsuite/29_atomics/atomic_integral/operators/increment_neg.cc:
2224         Likewise.
2225
2226 2021-08-03  Jonathan Wakely  <jwakely@redhat.com>
2227
2228         * include/std/memory_resource (polymorphic_allocator::delete_object):
2229         Call destructor directly instead of using destroy.
2230         (allocator_traits<polymorphic_allocator<T>>): Define partial
2231         specialization.
2232
2233 2021-08-03  Jonathan Wakely  <jwakely@redhat.com>
2234
2235         * testsuite/20_util/function_objects/binders/3113.cc: Remove
2236         trailing whitespace.
2237         * testsuite/20_util/shared_ptr/assign/auto_ptr.cc: Likewise.
2238         * testsuite/20_util/shared_ptr/assign/auto_ptr_neg.cc: Likewise.
2239         * testsuite/20_util/shared_ptr/assign/auto_ptr_rvalue.cc:
2240         Likewise.
2241         * testsuite/20_util/shared_ptr/creation/dr925.cc: Likewise.
2242         * testsuite/25_algorithms/headers/algorithm/synopsis.cc:
2243         Likewise.
2244         * testsuite/25_algorithms/random_shuffle/requirements/explicit_instantiation/2.cc:
2245         Likewise.
2246         * testsuite/25_algorithms/random_shuffle/requirements/explicit_instantiation/pod.cc:
2247         Likewise.
2248
2249 2021-08-03  Jonathan Wakely  <jwakely@redhat.com>
2250
2251         * doc/xml/manual/evolution.xml: Document deprecation.
2252         * doc/html/*: Regenerate.
2253         * include/bits/c++config (_GLIBCXX14_DEPRECATED): Define.
2254         (_GLIBCXX14_DEPRECATED_SUGGEST): Define.
2255         * include/bits/stl_algo.h (random_shuffle): Deprecate for C++14
2256         and later.
2257         * testsuite/25_algorithms/headers/algorithm/synopsis.cc: Adjust
2258         for C++11 and C++14 changes to std::random_shuffle and
2259         std::shuffle.
2260         * testsuite/25_algorithms/random_shuffle/1.cc: Add options to
2261         use deprecated algorithms.
2262         * testsuite/25_algorithms/random_shuffle/59603.cc: Likewise.
2263         * testsuite/25_algorithms/random_shuffle/moveable.cc: Likewise.
2264         * testsuite/25_algorithms/random_shuffle/requirements/explicit_instantiation/2.cc:
2265         Likewise.
2266         * testsuite/25_algorithms/random_shuffle/requirements/explicit_instantiation/pod.cc:
2267         Likewise.
2268
2269 2021-08-03  Jonathan Wakely  <jwakely@redhat.com>
2270
2271         * testsuite/23_containers/forward_list/operations/3.cc:
2272         Use lambda instead of std::bind2nd.
2273         * testsuite/20_util/function_objects/binders/3113.cc: Add
2274         options for testing deprecated features.
2275         * testsuite/20_util/pair/cons/99957.cc: Likewise.
2276         * testsuite/20_util/shared_ptr/assign/auto_ptr.cc: Likewise.
2277         * testsuite/20_util/shared_ptr/assign/auto_ptr_neg.cc: Likewise.
2278         * testsuite/20_util/shared_ptr/assign/auto_ptr_rvalue.cc:
2279         Likewise.
2280         * testsuite/20_util/shared_ptr/cons/43820_neg.cc: Likewise.
2281         * testsuite/20_util/shared_ptr/cons/auto_ptr.cc: Likewise.
2282         * testsuite/20_util/shared_ptr/cons/auto_ptr_neg.cc: Likewise.
2283         * testsuite/20_util/shared_ptr/creation/dr925.cc: Likewise.
2284         * testsuite/20_util/unique_ptr/cons/auto_ptr.cc: Likewise.
2285         * testsuite/20_util/unique_ptr/cons/auto_ptr_neg.cc: Likewise.
2286         * testsuite/ext/pb_ds/example/priority_queue_erase_if.cc:
2287         Likewise.
2288         * testsuite/ext/pb_ds/example/priority_queue_split_join.cc:
2289         Likewise.
2290         * testsuite/lib/dg-options.exp (dg_add_options_using-deprecated):
2291         New proc.
2292
2293 2021-08-03  Jonathan Wakely  <jwakely@redhat.com>
2294
2295         * include/bits/regex_executor.h (_State_info): Replace
2296         unique_ptr<bool[]> with array of bool.
2297         * include/bits/regex_executor.tcc: Likewise.
2298         * include/bits/regex_scanner.tcc: Replace std::strchr with
2299         __builtin_strchr.
2300         * include/std/regex: Replace standard headers with smaller
2301         internal ones.
2302         * testsuite/28_regex/traits/char/lookup_classname.cc: Include
2303         <string.h> for strlen.
2304         * testsuite/28_regex/traits/char/lookup_collatename.cc:
2305         Likewise.
2306
2307 2021-08-03  Jonathan Wakely  <jwakely@redhat.com>
2308
2309         * include/bits/locale_conv.h (__detail::_Scoped_ptr): Define new
2310         RAII class template.
2311         (wstring_convert, wbuffer_convert): Use __detail::_Scoped_ptr
2312         instead of unique_ptr.
2313
2314 2021-08-02  Patrick Palka  <ppalka@redhat.com>
2315
2316         PR libstdc++/101599
2317         * include/bits/ranges_algo.h (__reverse_copy_fn::operator()):
2318         Add missing std::move in return statement.
2319         (__partition_copy_fn::operator()): Rename templtae parameter
2320         _O2 to _Out2.  Uglify function parameters out_true and out_false.
2321         * include/bits/ranges_algobase.h (__copy_or_move): Add missing
2322         std::move to recursive call that unwraps a __normal_iterator
2323         output iterator.
2324         * testsuite/25_algorithms/copy/constrained.cc (test06): New test.
2325         * testsuite/25_algorithms/move/constrained.cc (test05): New test.
2326
2327 2021-08-02  Patrick Palka  <ppalka@redhat.com>
2328
2329         PR libstdc++/101589
2330         * include/std/ranges (lazy_split_view::_InnerIter::base): Make
2331         the const& overload unconstrained and return a const reference
2332         as per LWG 3533.  Make unconditionally noexcept.
2333         (elements_view::base): Revert accidental r12-569 change.
2334         (elements_view::_Iterator::base): Make the const& overload
2335         unconstrained and return a const reference as per LWG 3533.
2336         Make unconditionally noexcept.
2337
2338 2021-08-02  Patrick Palka  <ppalka@redhat.com>
2339
2340         PR libstdc++/101483
2341         * include/std/ranges (join_view::_Iterator::_Iterator): Add
2342         missing std::move.
2343
2344 2021-08-02  Jonathan Wakely  <jwakely@redhat.com>
2345
2346         PR libstdc++/101709
2347         * src/filesystem/ops-common.h (get_temp_directory_from_env):
2348         Add error_code parameter.
2349         * src/c++17/fs_ops.cc (fs::temp_directory_path): Pass error_code
2350         argument to get_temp_directory_from_env and check it.
2351         * src/filesystem/ops.cc (fs::temp_directory_path): Likewise.
2352
2353 2021-08-02  Jonathan Wakely  <jwakely@redhat.com>
2354
2355         * testsuite/20_util/tuple/comparison_operators/overloaded2.cc:
2356         Add dg-error for c++11_only target.
2357
2358 2021-07-30  Jonathan Wakely  <jwakely@redhat.com>
2359
2360         PR libstdc++/65018
2361         * configure.ac: Check for secure_getenv.
2362         * config.h.in: Regenerate.
2363         * configure: Regenerate.
2364         * src/filesystem/ops-common.h (get_temp_directory_from_env): New
2365         helper function to obtain path from the environment.
2366         * src/c++17/fs_ops.cc (fs::temp_directory_path): Use new helper.
2367         * src/filesystem/ops.cc (fs::temp_directory_path): Likewise.
2368         * testsuite/27_io/filesystem/operations/temp_directory_path.cc:
2369         Print messages if test cannot be run.
2370         * testsuite/experimental/filesystem/operations/temp_directory_path.cc:
2371         Likewise. Fix incorrect condition. Use "TMP" to work with
2372         Windows as well as POSIX.
2373
2374 2021-07-29  Hans-Peter Nilsson  <hp@bitrange.com>
2375
2376         * src/c++17/memory_resource.cc: Use __exchange instead
2377         of std::exchange.
2378
2379 2021-07-27  Jonathan Wakely  <jwakely@redhat.com>
2380
2381         * include/experimental/optional (__throw_bad_optional_access):
2382         Replace GNU attribute with C++11 attribute.
2383         (optional::value, optional::value_or): Use if statements
2384         instead of conditional expressions.
2385         * include/std/optional (__throw_bad_optional_access)
2386         (optional::value, optional::value_or): Likewise.
2387
2388 2021-07-27  Marek Polacek  <polacek@redhat.com>
2389
2390         DR 1512
2391         PR c++/99701
2392         * testsuite/20_util/tuple/comparison_operators/overloaded.cc:
2393         Move a line...
2394         * testsuite/20_util/tuple/comparison_operators/overloaded2.cc:
2395         ...here.  New test.
2396
2397 2021-07-27  Jonathan Wakely  <jwakely@redhat.com>
2398
2399         * include/bits/cow_string.h: Consistently use tab for
2400         indentation.
2401
2402 2021-07-27  Jonathan Wakely  <jwakely@redhat.com>
2403
2404         * include/Makefile.am: Add new header.
2405         * include/Makefile.in: Regenerate.
2406         * include/bits/basic_string.h [!_GLIBCXX_USE_CXX11_ABI]
2407         (basic_string): Move definition of Copy-on-Write string to
2408         new file.
2409         * include/bits/basic_string.tcc: Likewise.
2410         * include/bits/cow_string.h: New file.
2411
2412 2021-07-27  Jonathan Wakely  <jwakely@redhat.com>
2413
2414         * include/std/algorithm: Do not include <utility>.
2415         * include/std/functional: Likewise.
2416         * include/std/regex: Include <bits/stl_pair.h> instead of
2417         <utility>.
2418         * include/debug/map.h: Likewise.
2419         * include/debug/multimap.h: Likewise.
2420         * include/debug/multiset.h: Likewise.
2421         * include/debug/set.h: Likewise.
2422         * include/debug/vector: Likewise.
2423         * include/bits/fs_path.h: Likewise.
2424         * include/bits/unique_ptr.h: Do not include <utility>.
2425         * include/experimental/any: Likewise.
2426         * include/experimental/executor: Likewise.
2427         * include/experimental/memory: Likewise.
2428         * include/experimental/optional: Likewise.
2429         * include/experimental/socket: Use __exchange instead
2430         of std::exchange.
2431         * src/filesystem/ops-common.h: Likewise.
2432         * testsuite/20_util/default_delete/48631_neg.cc: Adjust expected
2433         errors to not use a hardcoded line number.
2434         * testsuite/20_util/default_delete/void_neg.cc: Likewise.
2435         * testsuite/20_util/specialized_algorithms/uninitialized_copy/constrained.cc:
2436         Include <utility> for std::as_const.
2437         * testsuite/20_util/specialized_algorithms/uninitialized_default_construct/constrained.cc:
2438         Likewise.
2439         * testsuite/20_util/specialized_algorithms/uninitialized_move/constrained.cc:
2440         Likewise.
2441         * testsuite/20_util/specialized_algorithms/uninitialized_value_construct/constrained.cc:
2442         Likewise.
2443         * testsuite/23_containers/vector/cons/destructible_debug_neg.cc:
2444         Adjust dg-error line number.
2445
2446 2021-07-27  Jonathan Wakely  <jwakely@redhat.com>
2447
2448         * include/Makefile.am: Add bits/utility.h header.
2449         * include/Makefile.in: Regenerate.
2450         * include/bits/utility.h: New file.
2451         * include/std/utility (tuple_size, tuple_element): Move
2452         to new header.
2453         * include/std/type_traits (__is_tuple_like_impl<tuple<T...>>):
2454         Move to <tuple>.
2455         (_Index_tuple, _Build_index_tuple, integer_sequence): Likewise.
2456         (in_place_t, in_place_index_t, in_place_type_t): Likewise.
2457         * include/bits/ranges_util.h: Include new header instead of
2458         <utility>.
2459         * include/bits/stl_pair.h (tuple_size, tuple_element): Move
2460         partial specializations for std::pair here.
2461         (get): Move overloads for std::pair here.
2462         * include/std/any: Include new header instead of <utility>.
2463         * include/std/array: Likewise.
2464         * include/std/memory_resource: Likewise.
2465         * include/std/optional: Likewise.
2466         * include/std/variant: Likewise.
2467         * include/std/tuple: Likewise.
2468         (__is_tuple_like_impl<tuple<T...>>): Move here.
2469         (get) Declare overloads for std::array.
2470         * include/std/version (__cpp_lib_tuples_by_type): Change type
2471         to long.
2472         * testsuite/20_util/optional/84601.cc: Include <utility>.
2473         * testsuite/20_util/specialized_algorithms/uninitialized_fill/constrained.cc:
2474         Likewise.
2475         * testsuite/23_containers/array/tuple_interface/get_neg.cc:
2476         Adjust dg-error line numbers.
2477         * testsuite/std/ranges/access/cbegin.cc: Include <utility>.
2478         * testsuite/std/ranges/access/cend.cc: Likewise.
2479         * testsuite/std/ranges/access/end.cc: Likewise.
2480         * testsuite/std/ranges/single_view.cc: Likewise.
2481
2482 2021-07-23  Jonathan Wakely  <jwakely@redhat.com>
2483
2484         * include/std/future: Include <bits/atomic_base.h> instead of
2485         <atomic>.
2486
2487 2021-07-23  Jonathan Wakely  <jwakely@redhat.com>
2488
2489         * include/bits/stl_relops.h: Update documentation comments.
2490
2491 2021-07-22  Jonathan Wakely  <jwakely@redhat.com>
2492
2493         PR libstdc++/101583
2494         * include/bits/hashtable.h (_Hashtable): Replace mixin with
2495         _Enable_default_ctor. Construct it explicitly in all
2496         non-forwarding, non-defaulted constructors.
2497         * testsuite/23_containers/unordered_map/cons/default.cc: Check
2498         non-default constructors can be used.
2499         * testsuite/23_containers/unordered_set/cons/default.cc:
2500         Likewise.
2501
2502 2021-07-22  David Edelsohn  <dje.gcc@gmail.com>
2503
2504         * config/os/aix/os_defines.h (__LIBC_NO_CPP_MATH_OVERLOADS__): Define.
2505
2506 2021-07-22  Jonathan Wakely  <jwakely@redhat.com>
2507
2508         PR libstdc++/94295
2509         * include/ext/new_allocator.h (_GLIBCXX_OPERATOR_NEW)
2510         (_GLIBCXX_OPERATOR_DELETE, _GLIBCXX_SIZED_DEALLOC): Define.
2511         (allocator::allocate, allocator::deallocate): Use new macros.
2512
2513 2021-07-22  Jonathan Wakely  <jwakely@redhat.com>
2514
2515         PR libstdc++/101571
2516         * include/bits/ranges_uninitialized.h (_DestroyGuard): Change
2517         constructor parameter to reference and use addressof.
2518         * testsuite/util/testsuite_iterators.h: Define deleted operator&
2519         overloads for test iterators.
2520
2521 2021-07-22  Jonathan Wakely  <jwakely@redhat.com>
2522
2523         * include/bits/std_function.h (_Function_base): Add
2524         default member initializers and define constructor as defaulted.
2525         (function::_M_invoker): Add default member initializer.
2526
2527 2021-07-22  Jonathan Wakely  <jwakely@redhat.com>
2528
2529         PR libstdc++/100682
2530         * doc/xml/manual/debug_mode.xml: Update documentation about
2531         debug capability of std::array.
2532         * doc/html/*: Regenerate.
2533         * include/debug/array: New file.
2534
2535 2021-07-21  Jonathan Wakely  <jwakely@redhat.com>
2536
2537         PR libstdc++/101542
2538         * include/ext/rope (sequence_buffer): Add move constructor and
2539         move assignment operator.
2540         * testsuite/ext/rope/101542.cc: New test.
2541
2542 2021-07-20  Jonathan Wakely  <jwakely@redhat.com>
2543
2544         PR libstdc++/101510
2545         * src/c++17/fs_ops.cc (fs::create_directories): Use status
2546         instead of symlink_status.
2547         * src/filesystem/ops.cc (fs::create_directories): Likewise.
2548         * testsuite/27_io/filesystem/operations/create_directories.cc:
2549         Check symlink to existing directory.
2550         * testsuite/27_io/filesystem/operations/create_directory.cc: Do
2551         not test with symlinks on Windows.
2552         * testsuite/experimental/filesystem/operations/create_directories.cc:
2553         Check symlink to existing directory.
2554         * testsuite/experimental/filesystem/operations/create_directory.cc:
2555         Do not test with symlinks on Windows.
2556
2557 2021-07-20  Jonathan Wakely  <jwakely@redhat.com>
2558
2559         PR libstdc++/100863
2560         * include/bits/hashtable.h (_Hashtable): Conditionally delete
2561         default constructor by deriving from _Enable_special_members.
2562         * testsuite/23_containers/unordered_map/cons/default.cc: New test.
2563         * testsuite/23_containers/unordered_set/cons/default.cc: New test.
2564
2565 2021-07-20  Jonathan Wakely  <jwakely@redhat.com>
2566
2567         PR libstdc++/101510
2568         * src/c++17/fs_ops.cc (create_dir): Adjust whitespace.
2569         * testsuite/27_io/filesystem/operations/create_directory.cc:
2570         Test creating directory with name of existing symlink to
2571         directory.
2572         * testsuite/experimental/filesystem/operations/create_directory.cc:
2573         Likewise.
2574
2575 2021-07-16  Jonathan Wakely  <jwakely@redhat.com>
2576
2577         * include/std/tuple (get<I>): Add deleted overload for bad
2578         index.
2579         * testsuite/20_util/tuple/element_access/get_neg.cc: Adjust
2580         expected errors.
2581
2582 2021-07-16  Jonathan Wakely  <jwakely@redhat.com>
2583
2584         * include/bits/max_size_type.h (numeric_limits<__max_size_type>):
2585         Use __int_traits unconditionally.
2586
2587 2021-07-16  Jonathan Wakely  <jwakely@redhat.com>
2588
2589         * include/bits/random.h (_Shift::__value): Use constexpr.
2590         (_Select_uint_least_t::type): Use using-declaration.
2591         (_Mod): Likewise.
2592         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error
2593         line number.
2594
2595 2021-07-16  Jonathan Wakely  <jwakely@redhat.com>
2596
2597         * include/bits/cpp_type_traits.h (__INT_N): Use __extension__
2598         instead of diagnostic pragmas.
2599         * include/bits/functional_hash.h: Likewise.
2600         * include/bits/iterator_concepts.h (__is_signed_int128)
2601         (__is_unsigned_int128): Likewise.
2602         * include/bits/max_size_type.h (__max_size_type): Likewise.
2603         (numeric_limits<__max_size_type>): Likewise.
2604         * include/bits/std_abs.h (abs): Likewise.
2605         * include/bits/stl_algobase.h (__size_to_integer): Likewise.
2606         * include/bits/uniform_int_dist.h (uniform_int_distribution):
2607         Likewise.
2608         * include/ext/numeric_traits.h (_GLIBCXX_INT_N_TRAITS):
2609         Likewise.
2610         * include/std/type_traits (__is_integral_helper<INT_N>)
2611         (__is_signed_integer, __is_unsigned_integer)
2612         (__make_unsigned<INT_N>, __make_signed<INT_N>): Likewise.
2613         * include/std/limits (__INT_N): Add __extension__ keyword.
2614         * include/bits/random.h (_Select_uint_least_t)
2615         (random_device): Likewise.
2616
2617 2021-07-16  Patrick Palka  <ppalka@redhat.com>
2618
2619         PR libstdc++/101231
2620         * include/std/ranges (_CachedPosition::_M_get): For non-forward
2621         ranges, just call __builtin_unreachable.
2622         * testsuite/std/ranges/istream_view.cc (test05): New test.
2623
2624 2021-07-16  Patrick Palka  <ppalka@redhat.com>
2625
2626         PR libstdc++/101214
2627         * include/std/ranges (split_view::split_view): Use std::move.
2628         (split_view::_Iterator::_Iterator): Remove redundant
2629         default_initializable constraint.
2630         (split_view::_Sentinel::_Sentinel): Declare.
2631         * testsuite/std/ranges/adaptors/split.cc (test02): New test.
2632
2633 2021-07-16  Marek Polacek  <polacek@redhat.com>
2634
2635         * testsuite/20_util/ratio/operations/ops_overflow_neg.cc: Add
2636         dg-error.
2637
2638 2021-07-16  Jonathan Wakely  <jwakely@redhat.com>
2639
2640         * include/bits/unique_ptr.h: Adjust doxygen markup.
2641
2642 2021-07-16  Jonathan Wakely  <jwakely@redhat.com>
2643
2644         PR libstdc++/101307
2645         * include/std/type_traits: Adjust doxygen markup.
2646
2647 2021-07-16  Jonathan Wakely  <jwakely@redhat.com>
2648
2649         * include/bits/cpp_type_traits.h: Add diagnostic pragmas around
2650         uses of non-standard integer types.
2651         * include/bits/functional_hash.h: Likewise.
2652         * include/bits/iterator_concepts.h: Likewise.
2653         * include/bits/max_size_type.h: Likewise.
2654         * include/bits/std_abs.h: Likewise.
2655         * include/bits/stl_algobase.h: Likewise.
2656         * include/bits/uniform_int_dist.h: Likewise.
2657         * include/ext/numeric_traits.h: Likewise.
2658         * include/std/type_traits: Likewise.
2659
2660 2021-07-15  Jonathan Wakely  <jwakely@redhat.com>
2661
2662         PR libstdc++/101427
2663         * include/std/tuple (tuple_element): Improve static_assert text.
2664         (__get_helper): Add deleted overload.
2665         (get<i>(tuple<T...>&&), get<i>(const tuple<T...>&&)): Use
2666         __get_helper directly.
2667         (__get_helper2): Remove.
2668         (__find_uniq_type_in_pack): New constexpr helper function.
2669         (get<T>): Use __find_uniq_type_in_pack and __get_helper instead
2670         of __get_helper2.
2671         * testsuite/20_util/tuple/element_access/get_neg.cc: Adjust
2672         expected errors.
2673         * testsuite/20_util/tuple/element_access/101427.cc: New test.
2674
2675 2021-07-15  Jonathan Wakely  <jwakely@redhat.com>
2676
2677         PR libstdc++/101429
2678         * include/bits/c++config (__replacement_assert): Add noexcept.
2679         [!_GLIBCXX_VERBOSE] (__glibcxx_assert_impl): Use __builtin_abort
2680         instead of __replacement_assert.
2681
2682 2021-07-14  Jonathan Wakely  <jwakely@redhat.com>
2683
2684         * include/std/string_view (basic_string_view(It, End)): Add
2685         noexcept-specifier.
2686         * testsuite/21_strings/basic_string_view/cons/char/range.cc:
2687         Check noexcept-specifier. Also check construction without CTAD.
2688
2689 2021-07-13  Jonathan Wakely  <jwakely@redhat.com>
2690
2691         PR c++/101361
2692         * include/std/string_view (ends_with): Use traits_type::compare
2693         directly.
2694
2695 2021-07-13  Jonathan Wakely  <jwakely@redhat.com>
2696
2697         * include/std/string_view: Only include <bits/ranges_base.h>
2698         once, and only for C++20 and later.
2699
2700 2021-07-12  Jonathan Wakely  <jwakely@redhat.com>
2701
2702         PR libstdc++/101411
2703         * include/std/span (as_writable_bytes): Add requires-clause.
2704         * testsuite/23_containers/span/101411.cc: New test.
2705
2706 2021-07-09  Matheus Castanho  <msc@linux.ibm.com>
2707
2708         * include/std/mutex (__lock_impl): Check
2709         _GLIBCXX_HAS_GTHREADS before using __gthread_yield.
2710
2711 2021-07-02  Jonathan Wakely  <jwakely@redhat.com>
2712
2713         PR libstdc++/101271
2714         * include/bits/unique_ptr.h (unique_ptr<T[],D>::operator[]):
2715         Remove noexcept-specifier.
2716         (unique_ptr<T[],D>::_S_nothrow_deref): Remove.
2717         * testsuite/20_util/unique_ptr/lwg2762.cc: Remove checks for
2718         operator[].
2719
2720 2021-07-01  Jonathan Wakely  <jwakely@redhat.com>
2721
2722         * doc/doxygen/doxygroups.cc: Fix docs for std::literals.
2723         * doc/doxygen/user.cfg.in: Exclude the Networking TS header.
2724         Add some more predefined macros.
2725         * include/bits/fs_fwd.h: Move @addtogroup commands inside
2726         namespaces. Add better documentation.
2727         * include/bits/fs_path.h: Likewise.
2728         * include/experimental/bits/fs_fwd.h: Likewise.
2729         * include/experimental/bits/fs_path.h: Likewise.
2730         * include/ext/throw_allocator.h: Fix typo and improve docs.
2731         * include/std/chrono: Move @addtogroup commands.
2732         * include/std/system_error: Move @addtogroup commands.
2733         * libsupc++/exception: Improve documentation.
2734         * libsupc++/exception.h: Add @since documentation.
2735
2736 2021-06-30  Jonathan Wakely  <jwakely@redhat.com>
2737
2738         PR libstdc++/101258
2739         * doc/doxygen/user.cfg.in (INPUT): Add <experimental/simd>.
2740         (COLS_IN_ALPHA_INDEX): Remove obsolete tag.
2741         (PREDEFINED): Add/fix some more macros that need to be expanded.
2742         * include/bits/random.h: Stop Doxygen from documenting internal
2743         implementation details.
2744         * include/bits/random.tcc: Likewise.
2745         * include/bits/this_thread_sleep.h: Fix @file name.
2746         * include/experimental/bits/simd.h: Add to Doxygen group. Do not
2747         document internal implementation details.
2748         * include/experimental/bits/simd_detail.h: Do not document
2749         internal implementation details.
2750         * include/experimental/simd: Define Doxygen groups.
2751         * include/experimental/type_traits: Improve documentation for
2752         the header file. Define groups. Use @since commands.
2753         * include/std/scoped_allocator (scoped_allocator_adaptor): Move
2754         declaration before undocumented region.
2755         * include/std/type_traits (true_type, false_type): Use using
2756         declaration instead of typedef.
2757         (is_invocable_v, is_nothrow_invocable_v, is_invocable_r_v)
2758         (is_nothrow_invocable_r_v): Move definitions next to other C++17
2759         variable templates.
2760         Do not document internal implementation details. Move misplaced
2761         group-end command. Define group for variable templates.
2762         * include/std/variant: Do not document internal implementation
2763         details.
2764         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error
2765         line number.
2766
2767 2021-06-30  Jonathan Wakely  <jwakely@redhat.com>
2768
2769         * include/experimental/simd: Do not define anything pre-C++17.
2770
2771 2021-06-30  Jonathan Wakely  <jwakely@redhat.com>
2772
2773         * include/bits/random.tcc [__cpp_inline_variables]: Remove
2774         redundant definitions of static constexpr member variables.
2775         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error
2776         line number.
2777
2778 2021-06-28  Jonathan Wakely  <jwakely@redhat.com>
2779
2780         * include/bits/streambuf.tcc (__copy_streambufs_eof): Remove
2781         explicit instantiation declarations.
2782         * src/c++11/streambuf-inst.cc (__copy_streambufs_eof): Remove
2783         explicit instantiation definitions.
2784
2785 2021-06-28  Jonathan Wakely  <jwakely@redhat.com>
2786
2787         PR libstdc++/97088
2788         * testsuite/17_intro/names.cc: Fix #if condition for names used
2789         by newlib headers.
2790
2791 2021-06-28  Jonathan Wakely  <jwakely@redhat.com>
2792
2793         PR libstdc++/101236
2794         * include/bits/unique_ptr.h (unique_ptr<T[], D>::operator[]):
2795         Fail gracefully if element_type is incomplete.
2796         * testsuite/20_util/unique_ptr/cons/incomplete.cc: Clarify that
2797         the standard doesn't require this test to work for array types.
2798         * testsuite/20_util/unique_ptr/lwg2762.cc: Check that incomplete
2799         types can be used with array specialization.
2800         * testsuite/20_util/unique_ptr/101236.cc: New test.
2801
2802 2021-06-28  Jonathan Wakely  <jwakely@redhat.com>
2803
2804         * doc/xml/manual/intro.xml: Document LWG 415 change.
2805         * doc/html/manual/bugs.html: Regenerate.
2806         * include/bits/istream.tcc (ws): Create sentry and catch
2807         exceptions.
2808         * testsuite/27_io/basic_istream/ws/char/lwg415.cc: New test.
2809         * testsuite/27_io/basic_istream/ws/wchar_t/lwg415.cc: New test.
2810
2811 2021-06-25  Jonathan Wakely  <jwakely@redhat.com>
2812
2813         * include/bits/ostream.tcc (basic_ostream::write): Call sputn
2814         directly instead of using _M_write. Do setstate(__err) all
2815         outside the try-catch block.
2816         * include/std/ostream (basic_ostream::_M_write): Declare
2817         private. Use __ostream_insert. Do not define for the versioned
2818         namespace.
2819
2820 2021-06-25  Jonathan Wakely  <jwakely@redhat.com>
2821
2822         * doc/xml/manual/intro.xml: Document LWG 581 change.
2823         * doc/html/manual/bugs.html: Regenerate.
2824         * include/bits/basic_ios.tcc: Whitespace.
2825         * include/bits/ostream.tcc (basic_ostream::flush()): Construct
2826         sentry.
2827         * testsuite/27_io/basic_ostream/flush/char/2.cc: Check
2828         additional cases.
2829         * testsuite/27_io/basic_ostream/flush/char/exceptions_badbit_throw.cc:
2830         Likewise.
2831         * testsuite/27_io/basic_ostream/flush/wchar_t/2.cc: Likewise.
2832         * testsuite/27_io/basic_ostream/flush/wchar_t/exceptions_badbit_throw.cc:
2833         Likewise.
2834
2835 2021-06-25  Jonathan Wakely  <jwakely@redhat.com>
2836
2837         * include/bits/ostream.tcc (sentry): Only set failbit if badbit
2838         is set, not if eofbit is set.
2839         (tellp, seekp, seekp): Create sentry object. Do not set badbit
2840         on exceptions.
2841         * testsuite/27_io/basic_ostream/seekp/char/exceptions_badbit_throw.cc:
2842         Adjust expected behaviour.
2843         * testsuite/27_io/basic_ostream/seekp/wchar_t/exceptions_badbit_throw.cc:
2844         Likewise.
2845         * testsuite/27_io/basic_ostream/tellp/char/exceptions_badbit_throw.cc:
2846         Likewise.
2847         * testsuite/27_io/basic_ostream/tellp/wchar_t/exceptions_badbit_throw.cc:
2848         Likewise.
2849         * testsuite/27_io/basic_ostream/seekp/char/n3168.cc: New test.
2850         * testsuite/27_io/basic_ostream/seekp/wchar_t/n3168.cc: New test.
2851         * testsuite/27_io/basic_ostream/tellp/char/n3168.cc: New test.
2852         * testsuite/27_io/basic_ostream/tellp/wchar_t/n3168.cc: New test.
2853
2854 2021-06-25  Jonathan Wakely  <jwakely@redhat.com>
2855
2856         * include/std/syncstream (basic_syncbuf::swap()): Remove
2857         noexcept, as per LWG 3498.
2858
2859 2021-06-25  Jonathan Wakely  <jwakely@redhat.com>
2860
2861         PR libstdc++/97088
2862         * testsuite/17_intro/names.cc: Undef more names for newlib and
2863         also for arm-none-linux-gnueabi.
2864         * testsuite/experimental/names.cc: Disable PCH.
2865
2866 2021-06-25  Matthias Kretz  <m.kretz@gsi.de>
2867
2868         * include/experimental/bits/simd.h (__bit_cast): Implement via
2869         __builtin_bit_cast #if available.
2870         (__proposed::simd_bit_cast): Add overloads for simd and
2871         simd_mask, which use __builtin_bit_cast (or __bit_cast #if not
2872         available), which return an object of the requested type with
2873         the same bits as the argument.
2874         * include/experimental/bits/simd_math.h: Use simd_bit_cast
2875         instead of __bit_cast to allow casts to fixed_size_simd.
2876         (copysign): Remove branch that was only required if __bit_cast
2877         cannot be constexpr.
2878         * testsuite/experimental/simd/tests/bits/test_values.h: Switch
2879         from __bit_cast to __proposed::simd_bit_cast since the former
2880         will not cast fixed_size objects anymore.
2881
2882 2021-06-24  Matthias Kretz  <m.kretz@gsi.de>
2883
2884         * include/experimental/bits/simd_math.h
2885         (_GLIBCXX_SIMD_MATH_CALL2_): Rename arg2_ to __arg2.
2886         (_GLIBCXX_SIMD_MATH_CALL3_): Rename arg2_ to __arg2 and arg3_ to
2887         __arg3.
2888
2889 2021-06-24  Matthias Kretz  <m.kretz@gsi.de>
2890
2891         * include/experimental/bits/simd.h (__execute_on_index_sequence)
2892         (__execute_on_index_sequence_with_return)
2893         (__call_with_n_evaluations, __call_with_subscripts): Add flatten
2894         attribute.
2895
2896 2021-06-24  Matthias Kretz  <m.kretz@gsi.de>
2897
2898         * include/experimental/bits/simd_x86.h (_S_trunc, _S_floor)
2899         (_S_ceil): Set bit 8 (_MM_FROUND_NO_EXC) on AVX and SSE4.1
2900         roundp[sd] calls.
2901
2902 2021-06-24  Matthias Kretz  <m.kretz@gsi.de>
2903
2904         * include/experimental/bits/simd_x86.h (_S_ldexp): The AVX512F
2905         implementation doesn't require a _VecBltnBtmsk ABI tag, it
2906         requires either a 64-Byte input (in which case AVX512F must be
2907         available) or AVX512VL.
2908
2909 2021-06-24  Matthias Kretz  <m.kretz@gsi.de>
2910
2911         * include/experimental/bits/simd_math.h: Undefine internal
2912         macros after use.
2913         (frexp): Move #if to a more sensible position and reformat
2914         preceding code.
2915         (logb): Call _SimdImpl::_S_logb for fixed_size instead of
2916         duplicating the code here.
2917         (modf): Simplify condition.
2918
2919 2021-06-24  Matthias Kretz  <m.kretz@gsi.de>
2920
2921         * include/experimental/bits/simd_math.h (fabs): Remove
2922         fabs(simd<integral>) overload.
2923
2924 2021-06-24  Matthias Kretz  <m.kretz@gsi.de>
2925
2926         * include/experimental/bits/simd_converter.h
2927         (_SimdConverter::operator()): Pass _SimdTuple by const-ref.
2928         * include/experimental/bits/simd_fixed_size.h
2929         (_GLIBCXX_SIMD_FIXED_OP): Pass binary operator _SimdTuple
2930         arguments by const-ref.
2931         (_S_masked_unary): Pass _SimdTuple by const-ref.
2932
2933 2021-06-24  Matthias Kretz  <m.kretz@gsi.de>
2934
2935         * include/experimental/bits/simd_fixed_size.h
2936         (_AbisInSimdTuple): Removed.
2937
2938 2021-06-24  Matthias Kretz  <m.kretz@gsi.de>
2939
2940         * include/experimental/bits/simd.h: Add missing operator~
2941         overload for simd<floating-point> to __float_bitwise_operators.
2942         * include/experimental/bits/simd_builtin.h
2943         (_SimdImplBuiltin::_S_complement): Bitcast to int (and back) to
2944         implement complement for floating-point vectors.
2945         * include/experimental/bits/simd_fixed_size.h
2946         (_SimdImplFixedSize::_S_copysign): New function, forwarding to
2947         copysign implementation of _SimdTuple members.
2948         * include/experimental/bits/simd_math.h (copysign): Call
2949         _SimdImpl::_S_copysign for fixed_size arguments. Simplify
2950         generic copysign implementation using the new ~ operator.
2951
2952 2021-06-24  Jonathan Wakely  <jwakely@redhat.com>
2953
2954         * testsuite/experimental/simd/README.md: Fix typos.
2955
2956 2021-06-24  Jonathan Wakely  <jwakely@redhat.com>
2957
2958         * include/bits/shared_ptr_base.h (__shared_ptr_access::operator[]):
2959         Add noexcept.
2960         * include/bits/unique_ptr.h (unique_ptr::operator*): Add
2961         conditional noexcept as per LWG 2762.
2962         * testsuite/20_util/shared_ptr/observers/array.cc: Check that
2963         dereferencing cannot throw.
2964         * testsuite/20_util/shared_ptr/observers/get.cc: Likewise.
2965         * testsuite/20_util/optional/observers/lwg2762.cc: New test.
2966         * testsuite/20_util/unique_ptr/lwg2762.cc: New test.
2967
2968 2021-06-23  Patrick Palka  <ppalka@redhat.com>
2969
2970         PR c++/101174
2971         * testsuite/23_containers/multiset/cons/deduction.cc:
2972         Uncomment CTAD example that was rejected by this bug.
2973         * testsuite/23_containers/set/cons/deduction.cc: Likewise.
2974
2975 2021-06-23  Jonathan Wakely  <jwakely@redhat.com>
2976
2977         * include/std/chrono (chrono::year::is_leap()): Fix incorrect
2978         logic in comment.
2979
2980 2021-06-23  Matthias Kretz  <m.kretz@gsi.de>
2981
2982         * testsuite/experimental/simd/README.md: New file.
2983
2984 2021-06-23  Matthias Kretz  <m.kretz@gsi.de>
2985
2986         * testsuite/experimental/simd/driver.sh: Rewrite output
2987         verbosity logic. Add -p/--percentage option. Allow -v/--verbose
2988         to be used twice. Add -x and -o short options. Parse long
2989         options with = instead of separating space generically. Parce
2990         contracted short options. Make unrecognized options an error.
2991         If same-line output is active, trap on EXIT to increment the
2992         progress (only with --percentage), erase the line and print the
2993         current status.
2994         * testsuite/experimental/simd/generate_makefile.sh: Initialize
2995         helper files for progress account keeping. Update help target
2996         for changes to DRIVEROPTS.
2997
2998 2021-06-23  Matthias Kretz  <m.kretz@gsi.de>
2999
3000         * testsuite/Makefile.am (check-simd): Remove -fno-tree-vrp flag
3001         and associated warning.
3002         * testsuite/Makefile.in: Regenerate.
3003
3004 2021-06-23  Cassio Neri  <cassio.neri@gmail.com>
3005             Jonathan Wakely  <jwakely@redhat.com>
3006             Ulrich Drepper  <drepper@redhat.com>
3007
3008         * include/std/chrono (chrono::year::is_leap()): Optimize.
3009
3010 2021-06-23  Patrick Palka  <ppalka@redhat.com>
3011
3012         PR c++/86439
3013         * testsuite/23_containers/map/cons/deduction.cc: Replace ambiguous
3014         CTAD examples.
3015         * testsuite/23_containers/multimap/cons/deduction.cc: Likewise.
3016         * testsuite/23_containers/multiset/cons/deduction.cc: Likewise.
3017         Mention one of the replaced examples is broken due to PR101174.
3018         * testsuite/23_containers/set/cons/deduction.cc: Likewise.
3019         * testsuite/23_containers/unordered_map/cons/deduction.cc: Replace
3020         ambiguous CTAD examples.
3021         * testsuite/23_containers/unordered_multimap/cons/deduction.cc:
3022         Likewise.
3023         * testsuite/23_containers/unordered_multiset/cons/deduction.cc:
3024         Likewise.
3025         * testsuite/23_containers/unordered_set/cons/deduction.cc: Likewise.
3026
3027 2021-06-23  Jonathan Wakely  <jwakely@redhat.com>
3028
3029         * include/std/mutex (__detail::__try_lock_impl): Rename
3030         parameter to avoid clashing with newlib's __lockable macro.
3031         (try_lock): Add 'inline' specifier.
3032         * testsuite/17_intro/names.cc: Add check for __lockable.
3033         * testsuite/30_threads/try_lock/5.cc: Add options for pthreads.
3034
3035 2021-06-22  Jonathan Wakely  <jwakely@redhat.com>
3036             Matthias Kretz  <m.kretz@gsi.de>
3037
3038         * include/std/mutex (lock): Replace recursion with iteration
3039         when lockables all have the same type.
3040         (__detail::__try_lock_impl): Likewise. Pass lockables as
3041         parameters, instead of a tuple. Always lock the first one, and
3042         recurse for the rest.
3043         (__detail::__lock_impl): Adjust call to __try_lock_impl.
3044         (__detail::__try_to_lock): Remove.
3045         * testsuite/30_threads/lock/3.cc: Check that mutexes are locked.
3046         * testsuite/30_threads/lock/4.cc: Also test non-heterogeneous
3047         arguments.
3048         * testsuite/30_threads/unique_lock/cons/60497.cc: Also check
3049         std::try_lock.
3050         * testsuite/30_threads/try_lock/5.cc: New test.
3051
3052 2021-06-22  Jonathan Wakely  <jwakely@redhat.com>
3053
3054         * include/std/memory (declare_reachable, undeclare_reachable)
3055         (declare_no_pointers, undeclare_no_pointers, get_pointer_safety)
3056         (pointer_safety): Only define for C++11 to C++20 inclusive.
3057         * testsuite/20_util/pointer_safety/1.cc: Do not run for C++23.
3058
3059 2021-06-22  Jonathan Wakely  <jwakely@redhat.com>
3060
3061         * include/bits/random.h (seed_seq): Constrain initializer-list
3062         constructor.
3063         * include/bits/random.tcc (seed_seq): Add template parameter.
3064         * testsuite/26_numerics/random/seed_seq/cons/default.cc: Check
3065         for noexcept.
3066         * testsuite/26_numerics/random/seed_seq/cons/initlist.cc: Check
3067         constraints.
3068
3069 2021-06-22  Thomas Rodgers  <rodgert@appliantology.com>
3070
3071         PR libstdc++/100806
3072         * include/bits/semaphore_base.h (__atomic_semaphore::_M_release):
3073         Force _M_release() to wake all waiting threads.
3074         * testsuite/30_threads/semaphore/100806.cc: New test.
3075
3076 2021-06-21  Jonathan Wakely  <jwakely@redhat.com>
3077
3078         * include/std/mutex (__try_to_lock): Move to __detail namespace.
3079         (struct __try_lock_impl): Replace with ...
3080         (__detail::__try_lock_impl<Idx>(tuple<Lockables...>&)): New
3081         function templates to implement std::try_lock.
3082         (try_lock): Use new __try_lock_impl.
3083         (__detail::__lock_impl(int, int&, L0&, L1&...)): New function
3084         template to implement std::lock.
3085         (lock): Use __lock_impl.
3086
3087 2021-06-21  Patrick Palka  <ppalka@redhat.com>
3088
3089         * include/bits/ranges_cmp.h (__cpp_lib_ranges): Adjust value.
3090
3091 2021-06-20  Patrick Palka  <ppalka@redhat.com>
3092
3093         * include/std/ranges (__non_propagating_cache::operator bool):
3094         Define for split_view::begin().
3095         (split_view): Define as per P2210.
3096         (views::__detail::__can_split_view): Define.
3097         (views::_Split, views::split): Define.
3098         * testsuite/std/ranges/adaptors/100577.cc (test01, test02):
3099         Test views::split.
3100         * testsuite/std/ranges/adaptors/split.cc: New test.
3101         * testsuite/std/ranges/p2325.cc (test08a): New test.
3102         * testsuite/std/ranges/p2367.cc (test01): Test views::split.
3103
3104 2021-06-20  Patrick Palka  <ppalka@redhat.com>
3105
3106         * include/std/ranges: Rename views::split to views::lazy_split,
3107         split_view to lazy_split_view, etc. throughout.
3108         * testsuite/std/ranges/*: Likewise.
3109         * testsuite/std/ranges/adaptors/lazy_split.cc: New file.
3110         * testsuite/std/ranges/adaptors/lazy_split_neg.cc: New file.
3111
3112 2021-06-20  Patrick Palka  <ppalka@redhat.com>
3113
3114         * include/std/ranges (split_view::_OuterIter::__at_end):
3115         Check _M_trailing_empty.
3116         (split_view::_OuterIter::_M_trailing_empty): Define this
3117         data member.
3118         (split_view::_OuterIter::operator++): Set _M_trailing_empty
3119         appropriately.
3120         (split_view::_OuterIter::operator==): Compare
3121         _M_trailing_empty.
3122         * testsuite/std/ranges/adaptors/100479.cc (test03): Expect two
3123         split parts instead of one.
3124         * testsuite/std/ranges/adaptors/split.cc (test11): New test.
3125
3126 2021-06-20  Patrick Palka  <ppalka@redhat.com>
3127
3128         * include/std/ranges (split_view::_InnerIter::base): Define as
3129         per P2210.
3130
3131 2021-06-19  Patrick Palka  <ppalka@redhat.com>
3132
3133         * include/std/ranges (transform_view::_Iterator::_S_iter_concept):
3134         Consider _Base instead of _Vp as per LWG 3555.
3135         (elements_view::_Iterator::_S_iter_concept): Likewise.
3136
3137 2021-06-19  Patrick Palka  <ppalka@redhat.com>
3138
3139         * include/std/ranges (split_view::_OuterIter::value_type::begin):
3140         Remove the non-const overload, and remove the copyable constraint
3141         on the const overload as per LWG 3553.
3142
3143 2021-06-19  Patrick Palka  <ppalka@redhat.com>
3144
3145         * include/bits/stl_iterator.h
3146         (__detail::__common_iter_use_postfix_proxy): Add
3147         move_constructible constraint as per LWG 3546.
3148         (common_iterator::__postfix_proxy): Adjust initializer of
3149         _M_keep as per LWG 3546.
3150
3151 2021-06-18  Patrick Palka  <ppalka@redhat.com>
3152
3153         PR libstdc++/100387
3154         * include/bits/ranges_algo.h (__minmax_fn::operator()): Rewrite
3155         to limit comparison complexity to 3*N/2.
3156         (__minmax_element_fn::operator()): Likewise.
3157         (shift_right): Avoid premature std::move of __result.
3158         * testsuite/25_algorithms/minmax/constrained.cc (test04, test05):
3159         New tests.
3160         * testsuite/25_algorithms/minmax_element/constrained.cc (test02):
3161         Likewise.
3162
3163 2021-06-18  Patrick Palka  <ppalka@redhat.com>
3164
3165         * include/std/concepts (convertible_to): Just use declval as per
3166         LWG 3557.
3167
3168 2021-06-18  Jonathan Wakely  <jwakely@redhat.com>
3169
3170         PR libstdc++/95833
3171         * include/std/numeric (reduce(Iter, Iter, T, BinaryOp)): Replace
3172         incorrect static_assert with ones matching the 'Mandates'
3173         conditions in the standard.
3174         * testsuite/26_numerics/reduce/95833.cc: New test.
3175
3176 2021-06-18  Jonathan Wakely  <jwakely@redhat.com>
3177
3178         * testsuite/21_strings/basic_string/cons/char/1.cc: Use
3179         diagnostic pragma to suppress -Wstringop-overread error.
3180
3181 2021-06-18  Patrick Palka  <ppalka@redhat.com>
3182
3183         * include/bits/ranges_algo.h (__find_fn, find, __find_if_fn)
3184         (find_if, __find_if_not_fn, find_if_not, _in_in_result)
3185         (__mismatch_fn, mismatch, __search_fn, search): Move to ...
3186         * include/bits/ranges_util.h: ... here.
3187         * include/std/ranges (__detail::find, __detail::find_if)
3188         (__detail::find_if_not, __detail::mismatch): Remove.
3189         (filter_view): Use ranges::find_if instead.
3190         (drop_while_view): Use ranges::find_if_not instead.
3191         (split_view): Use ranges::find and ranges::mismatch instead.
3192
3193 2021-06-18  Patrick Palka  <ppalka@redhat.com>
3194
3195         * include/bits/iterator_concepts.h (weakly_incrementable): Remove
3196         default_initializable requirement.
3197         * include/bits/ranges_base.h (ranges::view): Likewise.
3198         * include/bits/ranges_util.h (subrange): Constrain the default
3199         ctor.
3200         * include/bits/stl_iterator.h (back_insert_iterator): Remove the
3201         default ctor.
3202         (front_insert_iterator): Likewise.
3203         (insert_iterator): Likewise.  Remove NSDMIs.
3204         (common_iterator): Constrain the default ctor.
3205         (counted_iterator): Likewise.
3206         * include/bits/stream_iterator.h (ostream_iterator): Remove the
3207         default ctor.
3208         * include/std/ranges (__detail::__box::operator=): Handle
3209         self-assignment in the primary template.
3210         (__detail::__box): In the partial specialization: adjust
3211         constraints as per P2325.  Add specialized operator= for the
3212         case when the wrapped type is not copyable.  Constrain the
3213         default ctor.  Avoid list-initialization.
3214         (single_view): Constraint the default ctor.
3215         (iota_view): Relax semiregular constraint to copyable.
3216         Constrain the default ctor.
3217         (iota_view::_Iterator): Constraint the default ctor.
3218         (basic_istream_view): Remove the default ctor.  Remove NSDMIs.
3219         Remove redundant checks for empty _M_stream.
3220         (basic_istream_view::_Iterator): Likewise.
3221         (ref_view): Remove the default ctor.  Remove NSDMIs.
3222         (ref_view::_Iterator): Constrain the default ctor.
3223         (__detail::__non_propagating_cache::operator=): Define overload
3224         for assigning from a value of the underlying type.
3225         (filter_view): Likewise.
3226         (filter_view::_Iterator): Likewise.
3227         (transform_view): Likewise.
3228         (transform_view::_Iterator): Likewise.
3229         (take_view): Likewise.
3230         (take_view::_Iterator): Likewise.
3231         (take_while_view): Likewise.
3232         (take_while_view::_Iterator): Likewise.
3233         (drop_while_view): Likewise.
3234         (drop_while_view::_Iterator): Likewise.
3235         (join_view): Likewise.
3236         (split_view::_OuterIter::__current): Adjust after changing the
3237         type of _M_current.
3238         (split_view::_M_current): Wrap it in a __non_propagating_cache.
3239         (split_view::split_view): Constrain the default ctor.
3240         (common_view): Constrain the default ctor.
3241         (reverse_view): Likewise.
3242         (elements_view): Likewise.
3243         * include/std/span (enable_view<span<_ElementType, _Extent>>):
3244         Define this partial specialization to true unconditionally.
3245         * include/std/version (__cpp_lib_ranges): Adjust value.
3246         * testsuite/24_iterators/back_insert_iterator/constexpr.cc:
3247         Don't attempt to default construct a back_insert_iterator.
3248         * testsuite/24_iterators/front_insert_iterator/constexpr.cc:
3249         Don't attempt to default construct a front_insert_iterator.
3250         * testsuite/24_iterators/insert_iterator/constexpr.cc:
3251         Don't attempt to default construct an insert_iterator.
3252         * testsuite/24_iterators/ostream_iterator/requirements/constexpr.cc:
3253         Remove this test for default constructibility of ostream_iterator.
3254         * testsuite/std/ranges/97600.cc: Don't attempt to default
3255         construct a basic_istream_view.
3256         * testsuite/std/ranges/adaptors/detail/semiregular_box.cc:
3257         Rename to ...
3258         * testsuite/std/ranges/adaptors/detail/copyable_box.cc: ... this.
3259         (test02): Adjust now that __box is copyable-box not
3260         semiregular-box.
3261         (test03): New test.
3262         * testsuite/std/ranges/p2325.cc: New test.
3263         * testsuite/std/ranges/single_view.cc (test06): New test.
3264         * testsuite/std/ranges/view.cc: Adjust now that view doesn't
3265         require default_initializable.
3266
3267 2021-06-17  Jonathan Wakely  <jwakely@redhat.com>
3268
3269         PR libstdc++/91488
3270         * include/bits/basic_string.h (__cpp_lib_constexpr_string): Only
3271         define when is_constant_evaluated is available.
3272         * include/bits/char_traits.h (__cpp_lib_constexpr_char_traits):
3273         Likewise.
3274         (__constant_string_p, __constant_array_p): Remove.
3275         (char_traits): Use is_constant_evaluated directly.
3276         * include/std/version (__cpp_lib_constexpr_char_traits)
3277         (__cpp_lib_constexpr_string): Only define when
3278         is_constant_evaluated is available.
3279
3280 2021-06-17  Patrick Palka  <ppalka@redhat.com>
3281
3282         PR libstdc++/100940
3283         * include/std/ranges (__adaptor::_Partial): For the "simple"
3284         forwarding partial specializations, also require that
3285         the extra arguments are trivially copyable.
3286         * testsuite/std/ranges/adaptors/100577.cc (test04): New test.
3287
3288 2021-06-17  Patrick Palka  <ppalka@redhat.com>
3289
3290         PR libstdc++/100940
3291         * include/std/ranges (__adaptor::_RangeAdaptor): Document the
3292         template form of _S_has_simple_extra_args.
3293         (__adaptor::__adaptor_has_simple_extra_args): Add _Args template
3294         parameter pack.  Try to treat _S_has_simple_extra_args as a
3295         variable template parameterized by _Args.
3296         (__adaptor::_Partial): Pass _Arg/_Args to the constraint
3297         __adaptor_has_simple_extra_args.
3298         (views::_Take::_S_has_simple_extra_args): Templatize according
3299         to the type of the extra argument.
3300         (views::_Drop::_S_has_simple_extra_args): Likewise.
3301         (views::_Split::_S_has_simple_extra_args): Define.
3302         * testsuite/std/ranges/adaptors/100577.cc (test01, test02):
3303         Adjust after changes to _S_has_simple_extra_args mechanism.
3304         (test03): Define.
3305
3306 2021-06-16  Jonathan Wakely  <jwakely@redhat.com>
3307
3308         * include/bits/iterator_concepts.h (__decay_copy): Name type.
3309
3310 2021-06-16  Jonathan Wakely  <jwakely@redhat.com>
3311
3312         * include/bits/ranges_base.h (ranges::begin, ranges::end)
3313         (ranges::cbegin, ranges::cend, ranges::rbeing, ranges::rend)
3314         (ranges::crbegin, ranges::crend, ranges::size, ranges::ssize)
3315         (ranges::empty, ranges::data, ranges::cdata): Remove final
3316         keywords and deleted operator& overloads.
3317         * testsuite/24_iterators/customization_points/iter_move.cc: Use
3318         new is_customization_point_object function.
3319         * testsuite/24_iterators/customization_points/iter_swap.cc:
3320         Likewise.
3321         * testsuite/std/concepts/concepts.lang/concept.swappable/swap.cc:
3322         Likewise.
3323         * testsuite/std/ranges/access/begin.cc: Likewise.
3324         * testsuite/std/ranges/access/cbegin.cc: Likewise.
3325         * testsuite/std/ranges/access/cdata.cc: Likewise.
3326         * testsuite/std/ranges/access/cend.cc: Likewise.
3327         * testsuite/std/ranges/access/crbegin.cc: Likewise.
3328         * testsuite/std/ranges/access/crend.cc: Likewise.
3329         * testsuite/std/ranges/access/data.cc: Likewise.
3330         * testsuite/std/ranges/access/empty.cc: Likewise.
3331         * testsuite/std/ranges/access/end.cc: Likewise.
3332         * testsuite/std/ranges/access/rbegin.cc: Likewise.
3333         * testsuite/std/ranges/access/rend.cc: Likewise.
3334         * testsuite/std/ranges/access/size.cc: Likewise.
3335         * testsuite/std/ranges/access/ssize.cc: Likewise.
3336         * testsuite/util/testsuite_iterators.h
3337         (is_customization_point_object): New function.
3338
3339 2021-06-15  Jonathan Wakely  <jwakely@redhat.com>
3340
3341         * include/bits/ranges_base.h (ranges::begin, ranges::end)
3342         (ranges::cbegin, ranges::cend, ranges::rbeing, ranges::rend)
3343         (ranges::crbegin, ranges::crend, ranges::size, ranges::ssize)
3344         (ranges::empty, ranges::data, ranges::cdata): Make types final.
3345         Add deleted operator& overloads.
3346         (ranges::advance, ranges::distance, ranges::next, ranges::prev):
3347         Likewise.
3348         * testsuite/std/ranges/headers/ranges/synopsis.cc: Replace
3349         ill-formed & expressions with using-declarations. Add checks for
3350         other function objects.
3351
3352 2021-06-15  Jonathan Wakely  <jwakely@redhat.com>
3353
3354         * include/bits/ranges_util.h (view_interface): Add noexcept to
3355         empty, operator bool, data and size members.
3356         (subrange): Add noexcept to constructors.
3357         * include/std/ranges (single_view, ref_view): Add noexcept to
3358         constructors.
3359         (views::single, views::all): Add noexcept.
3360         * testsuite/std/ranges/adaptors/all.cc: Check noexcept.
3361         * testsuite/std/ranges/single_view.cc: Likewise.
3362
3363 2021-06-15  Jonathan Wakely  <jwakely@redhat.com>
3364
3365         * include/bits/ranges_util.h (subrange): Add __size_type typedef
3366         and use it to simplify declarations.
3367         (subrange(i, s, n)): Remove assertion.
3368         * testsuite/std/ranges/subrange/constexpr.cc: New test.
3369
3370 2021-06-15  Jonathan Wakely  <jwakely@redhat.com>
3371
3372         * include/bits/iterator_concepts.h (__cust_access::__decay_copy):
3373         Replace with function object.
3374         (__cust_access::__member_begin, ___cust_access::_adl_begin): Use
3375         __decay_copy unqualified.
3376         * include/bits/ranges_base.h (__member_end, __adl_end):
3377         Likewise. Use __range_iter_t for type of ranges::begin.
3378         (__member_rend): Use correct value category for rbegin argument.
3379         (__member_data): Use __decay_copy unqualified.
3380         (__begin_data): Use __range_iter_t for type of ranges::begin.
3381
3382 2021-06-14  Jonathan Wakely  <jwakely@redhat.com>
3383
3384         * include/bits/ranges_base.h (ranges::empty): Check whether
3385         conversion to bool can throw.
3386         * testsuite/std/ranges/access/empty.cc: Check for correct
3387         noexcept-specifier.
3388
3389 2021-06-14  Jonathan Wakely  <jwakely@redhat.com>
3390
3391         PR libstdc++/100894
3392         * include/std/type_traits (__common_ref_impl<X&, Y&>): Only
3393         use the type if it's a reference.
3394         * testsuite/20_util/common_reference/100894.cc: New test.
3395
3396 2021-06-14  Jonathan Wakely  <jwakely@redhat.com>
3397
3398         * testsuite/experimental/filesystem/path/native/conv_c++23.cc:
3399         Add dg-require-filesystem-ts directive.
3400
3401 2021-06-14  Jonathan Wakely  <jwakely@redhat.com>
3402
3403         PR libstdc++/101034
3404         * include/std/any (any(in_place_t<T>, initializer_list<U>, A&&...))
3405         (any::emplace<T>(initializer_list<U>, A&&...)): Fix constraint
3406         to use lvalue.
3407         * testsuite/20_util/any/cons/101034.cc: New test.
3408
3409 2021-06-14  Jonathan Wakely  <jwakely@redhat.com>
3410
3411         * testsuite/17_intro/headers/c++2017/all_attributes.cc: Add
3412         -std=gnu++17 option.
3413
3414 2021-06-14  Jonathan Wakely  <jwakely@redhat.com>
3415
3416         PR libstdc++/101056
3417         * libsupc++/compare (compare_partial_order_fallback): Add
3418         constraint using reversed parameter order, as per LWG 3465.
3419         * testsuite/18_support/comparisons/algorithms/fallback.cc:
3420         Adjust expected result.
3421
3422 2021-06-14  Jonathan Wakely  <jwakely@redhat.com>
3423
3424         * libsupc++/compare (__decayed_same_as): New helper concept.
3425         (strong_order, weak_order, partial_order): Constrain with new
3426         concept instead of using static_assert.
3427         (compare_strong_order_fallback, compare_weak_order_fallback)
3428         (compare_partial_order_fallback): Likewise. Do not deduce return
3429         types. Remove redundant if-constexpr checks.
3430         * testsuite/18_support/comparisons/algorithms/fallback.cc: New test.
3431
3432 2021-06-14  Jonathan Wakely  <jwakely@redhat.com>
3433
3434         PR libstdc++/101055
3435         * include/std/tuple: Use reserved form of attribute name.
3436         * testsuite/17_intro/headers/c++2011/all_attributes.cc: Add
3437         check for no_unique_address.
3438         * testsuite/17_intro/headers/c++2014/all_attributes.cc:
3439         Likewise.
3440         * testsuite/17_intro/headers/c++2017/all_attributes.cc:
3441         Likewise.
3442
3443 2021-06-11  Jonathan Wakely  <jwakely@redhat.com>
3444
3445         * include/bits/fs_path.h (operator==, operator<=>): Use new
3446         _S_compare function.
3447         (path::_S_compare): New function to call path::compare in a
3448         context where path::iterator is complete.
3449         * include/experimental/bits/fs_path.h (operator<, operator==):
3450         Define after path::iterator is complete.
3451         * testsuite/27_io/filesystem/path/native/conv_c++23.cc: New
3452         test.
3453         * testsuite/experimental/filesystem/path/native/conv_c++23.cc:
3454         New test.
3455
3456 2021-06-09  Thomas Rodgers  <rodgert@appliantology.com>
3457
3458         * testsuite/29_atomics/atomic_ref/wait_notify.cc: Guard
3459         test logic with constexpr check for is_always_lock_free.
3460
3461 2021-06-09  Jonathan Wakely  <jwakely@redhat.com>
3462
3463         PR libstdc++/100982
3464         * include/std/optional (optional::operator=(const optional<U>&)):
3465         Fix value category used in is_assignable check.
3466         * testsuite/20_util/optional/assignment/100982.cc: New test.
3467
3468 2021-06-09  Jonathan Wakely  <jwakely@redhat.com>
3469
3470         * include/bits/allocator.h (allocator::is_always_equal): Deprecate.
3471         * include/bits/iterator_concepts.h (indirectly_readable_traits):
3472         Add LWG issue number to comment.
3473         * include/std/memory_resource (polymorphic_allocator::release):
3474         Deprecate.
3475         * testsuite/20_util/allocator/requirements/typedefs.cc: Add
3476         dg-warning for deprecation. Also check std::allocator<void>.
3477
3478 2021-06-08  Thomas Rodgers  <rodgert@appliantology.com>
3479
3480         PR libstdc++/100889
3481         * include/bits/atomic_base.h (atomic_ref<_Tp*>::wait):
3482         Change parameter type from _Tp to _Tp*.
3483         * testsuite/29_atomics/atomic_ref/wait_notify.cc: Extend
3484         coverage of types tested.
3485
3486 2021-06-08  Thomas Rodgers  <rodgert@appliantology.com>
3487
3488         * include/std/barrier (__tree_barrier::_M_arrive): Remove
3489         unnecessary hasher instantiation.
3490
3491 2021-06-08  Jonathan Wakely  <jwakely@redhat.com>
3492
3493         * include/experimental/propagate_const (swap): Constrain.
3494         * testsuite/experimental/propagate_const/swap/lwg3413.cc: New test.
3495
3496 2021-06-07  Avi Kivity  <avi@scylladb.com>
3497
3498         PR libstdc++/100900
3499         * include/std/ranges (elements_view::__iter_cat::_S_iter_cat):
3500         Add missing typename.
3501
3502 2021-06-07  Jonathan Wakely  <jwakely@redhat.com>
3503
3504         PR libstdc++/98842
3505         * include/std/optional (operator<=>(const optional<T>& const U&)):
3506         Add missing constraint and add workaround for template
3507         recursion.
3508         * testsuite/20_util/optional/relops/three_way.cc: Check that
3509         type without equality comparison cannot be compared when wrapped
3510         in std::optional.
3511
3512 2021-06-05  Jonathan Wakely  <jwakely@redhat.com>
3513
3514         PR libstdc++/100824
3515         * include/bits/ranges_base.h (_SSize): Return signed type.
3516         * testsuite/std/ranges/access/ssize.cc: Check with __int128.
3517
3518 2021-06-04  Jonathan Wakely  <jwakely@redhat.com>
3519
3520         * include/bits/ranges_base.h (_SSize): Return the result of
3521         ranges::size converted to the wider of make-signed-like-t<S> and
3522         ptrdiff_t, rather than the ranges different type.
3523         * testsuite/std/ranges/access/ssize.cc: Adjust expected result
3524         for an iota_view that uses an integer class type for its
3525         difference_type.
3526
3527 2021-06-04  Jonathan Wakely  <jwakely@redhat.com>
3528
3529         PR libstdc++/100824
3530         * include/bits/ranges_base.h (__member_data): Use __decay_copy.
3531         * testsuite/std/ranges/access/data.cc: Add testcase from PR.
3532
3533 2021-06-04  Jonathan Wakely  <jwakely@redhat.com>
3534
3535         PR libstdc++/100824
3536         * include/bits/iterator_concepts.h (__detail::__decay_copy)
3537         (__detail::__member_begin, __detail::__adl_begin): Move to
3538         namespace ranges::__cust_access.
3539         (__detail::__ranges_begin): Likewise, and rename to __begin.
3540         Remove redundant static assertion.
3541         * include/bits/ranges_base.h (_Begin, _End, _RBegin, _REnd):
3542         Use lvalue in noexcept specifier.
3543         (__as_const): Add non-deduced parameter for value category.
3544         (_CBegin, _CEnd, _CRBegin, _CREnd, _CData): Adjust uses of
3545         __as_const.
3546         (__member_size, __adl_size, __member_empty, __size0_empty):
3547         (__eq_iter_empty, __adl_data): Use lvalue objects in
3548         requirements.
3549         (__sentinel_size): Likewise. Add check for conversion to
3550         unsigned-like.
3551         (__member_data): Allow non-lvalue types to satisfy the concept,
3552         but use lvalue object in requirements.
3553         (_Size, _SSize): Remove forwarding to always use an lvalue.
3554         (_Data): Likewise. Add static assertion for arrays.
3555         * testsuite/std/ranges/access/cdata.cc: Adjust expected
3556         behaviour for rvalues. Add negative tests for ill-formed
3557         expressions.
3558         * testsuite/std/ranges/access/data.cc: Likewise.
3559         * testsuite/std/ranges/access/empty.cc: Adjust expected
3560         behaviour for rvalues.
3561         * testsuite/std/ranges/access/size.cc: Likewise.
3562
3563 2021-06-04  Tim Adye  <Tim.Adye@cern.ch>
3564
3565         * include/std/any (any::_Manager::_S_access): New static
3566         function to access the contained value.
3567         (any::emplace, __any_caster): Use _S_access member of the
3568         manager type.
3569
3570 2021-06-04  Jonathan Wakely  <jwakely@redhat.com>
3571
3572         * doc/xml/manual/status_cxx2020.xml:
3573         * doc/html/*: Regenerate.
3574         * include/bits/hashtable.h (__cpp_lib_generic_unordered_lookup):
3575         Define.
3576         * include/std/version (__cpp_lib_generic_unordered_lookup):
3577         Define.
3578         * testsuite/23_containers/unordered_map/operations/1.cc: Check
3579         feature test macro.
3580         * testsuite/23_containers/unordered_set/operations/1.cc:
3581         Likewise.
3582
3583 2021-06-03  Patrick Palka  <ppalka@redhat.com>
3584
3585         * include/bits/ranges_algo.h (__detail::__can_reread_output):
3586         Factor out this concept from ...
3587         (__unique_copy_fn::operator()): ... here.  Use the concept
3588         throughout.
3589         * testsuite/std/ranges/range.cc: Remove now ill-formed use
3590         of range_value_t on an output_range.
3591         * testsuite/util/testsuite_iterators.h (output_iterator_wrapper):
3592         Define value_type, pointer and reference member types to void.
3593
3594 2021-06-03  Patrick Palka  <ppalka@redhat.com>
3595
3596         PR libstdc++/100577
3597         * include/std/ranges (_RangeAdaptorClosure): Document
3598         _S_has_simple_call_op mechanism.
3599         (_RangeAdaptor): Document _S_has_simple_extra_args mechanism.
3600         (__closure_has_simple_call_op): New concept.
3601         (__adaptor_has_simple_extra_args): Likewise.
3602         (_Partial<_Adaptor, _Args...>): New partial specialization.
3603         (_Partial<_Adaptor, _Arg>): Likewise.
3604         (_Pipe<_Lhs, _Rhs>): Likewise.
3605         (views::_All::_S_has_simple_call_op): Define to true.
3606         (views::_Filter::_S_has_simple_extra_args): Likewise.
3607         (views::_Transform::_S_has_simple_extra_args): Likewise.
3608         (views::_Take::_S_has_simple_extra_args): Likewise.
3609         (views::_TakeWhile::_S_has_simple_extra_args): Likewise.
3610         (views::_Drop::_S_has_simple_extra_args): Likewise.
3611         (views::_DropWhile::_S_has_simple_extra_args): Likewise.
3612         (views::_Join::_S_has_simple_call_op): Likewise.
3613         (views::_Split): Document why we don't define
3614         _S_has_simple_extra_args to true for this adaptor.
3615         (views::_Common::_S_has_simple_call_op): Define to true.
3616         (views::_Reverse::_S_has_simple_call_op): Likewise.
3617         (views::_Elements::_S_has_simple_call_op): Likewise.
3618         * testsuite/std/ranges/adaptors/100577.cc: New test.
3619
3620 2021-06-02  Jonathan Wakely  <jwakely@redhat.com>
3621
3622         PR libstdc++/100863
3623         PR libstdc++/65816
3624         * include/bits/hashtable_policy.h (_Hashtable_ebo_helper):
3625         Value-initialize subobject.
3626         * testsuite/23_containers/unordered_map/allocator/default_init.cc:
3627         Remove XFAIL.
3628         * testsuite/23_containers/unordered_set/allocator/default_init.cc:
3629         Remove XFAIL.
3630
3631 2021-06-02  Jonathan Wakely  <jwakely@redhat.com>
3632
3633         PR libstdc++/96088
3634         * testsuite/23_containers/unordered_map/96088.cc: Adjust
3635         expected number of allocations.
3636         * testsuite/23_containers/unordered_set/96088.cc: Likewise.
3637
3638 2021-06-02  Jonathan Wakely  <jwakely@redhat.com>
3639
3640         * doc/xml/manual/status_cxxis29124.xml: Improve punctuation.
3641         * doc/xml/manual/status_cxxtr1.xml: Likewise.
3642         * doc/xml/manual/status_cxxtr24733.xml: Likewise.
3643         * doc/html/*: Regenerate.
3644
3645 2021-06-01  Patrick Palka  <ppalka@redhat.com>
3646
3647         PR c++/65816
3648         * testsuite/23_containers/deque/allocator/default_init.cc,
3649         testsuite/23_containers/forward_list/allocator/default_init.cc,
3650         testsuite/23_containers/list/allocator/default_init.cc,
3651         testsuite/23_containers/map/allocator/default_init.cc,
3652         testsuite/23_containers/set/allocator/default_init.cc,
3653         testsuite/23_containers/vector/allocator/default_init.cc,
3654         testsuite/23_containers/vector/bool/allocator/default_init.cc:
3655         Remove xfail.
3656
3657 2021-06-01  Jonathan Wakely  <jwakely@redhat.com>
3658
3659         * testsuite/23_containers/unordered_map/96088.cc: Change
3660         effective target to c++17.
3661         * testsuite/23_containers/unordered_set/96088.cc: Likewise.
3662
3663 2021-06-01  Jonathan Wakely  <jwakely@redhat.com>
3664
3665         * testsuite/22_locale/ctype/is/string/89728_neg.cc: Only test
3666         isblank for C++11 and later.
3667
3668 2021-06-01  Jonathan Wakely  <jwakely@redhat.com>
3669
3670         PR libstdc++/100833
3671         * include/bits/ranges_base.h (ranges::advance(iter, n, sentinel)):
3672         Fix return value for no-op case.
3673         * testsuite/24_iterators/range_operations/advance.cc: Test
3674         return values of three-argument overload.
3675
3676 2021-06-01  Jonathan Wakely  <jwakely@redhat.com>
3677
3678         PR libstdc++/99453
3679         * python/Makefile.am: Use archive name for printer hook if no
3680         dynamic library name is available.
3681         * python/Makefile.in: Regenerate.
3682
3683 2021-05-30  Gerald Pfeifer  <gerald@pfeifer.com>
3684
3685         * doc/xml/manual/abi.xml: Remove dead reference to "Intel
3686         Compilers for Linux: Compatibility with GNU Compilers" article.
3687         * doc/html/manual/abi.html: Regenerate.
3688
3689 2021-05-26  François Dumont  <fdumont@gcc.gnu.org>
3690
3691         * include/debug/formatter.h
3692         (_Error_formatter::_Parameter::_Named): New.
3693         (_Error_formatter::_Parameter::_Type): Inherit latter.
3694         (_Error_formatter::_Parameter::_M_integer): Likewise.
3695         (_Error_formatter::_Parameter::_M_string): Likewise.
3696         * src/c++11/debug.cc: Include <cstring>.
3697         (_Print_func_t): New.
3698         (print_raw(PrintContext&, const char*, ptrdiff_t)): New.
3699         (print_word): Use '%.*s' format in fprintf to render only expected number of chars.
3700         (pretty_print(PrintContext&, const char*, _Print_func_t)): New.
3701         (print_type): Rename in...
3702         (print_type_info): ...this. Use pretty_print.
3703         (print_address, print_integer): New.
3704         (print_named_name, print_iterator_constness, print_iterator_state): New.
3705         (print_iterator_seq_type): New.
3706         (print_named_field, print_type_field, print_instance_field, print_iterator_field): New.
3707         (print_field): Use latters.
3708         (print_quoted_named_name, print_type_type, print_type, print_instance): New.
3709         (print_string(PrintContext&, const char*, const _Parameter*, size_t)):
3710         Change signature to...
3711         (print_string(PrintContext&, const char*, ptrdiff_t, const _Parameter*, size_t)):
3712         ...this and adapt. Remove intermediate buffer to render input string.
3713         (print_string(PrintContext&, const char*, ptrdiff_t)): New.
3714
3715 2021-05-26  Jonathan Wakely  <jwakely@redhat.com>
3716
3717         PR libstdc++/100768
3718         * include/bits/ranges_base.h (advance, distance, next, prev):
3719         Replace function templates with function objects.
3720         * testsuite/24_iterators/headers/iterator/synopsis_c++20.cc:
3721         Adjust for changes to function objects.
3722         * testsuite/std/ranges/adaptors/elements.cc: Add using
3723         declarations for names from namespace ranges.
3724         * testsuite/std/ranges/adaptors/transform.cc: Likewise.
3725         * testsuite/24_iterators/range_operations/100768.cc: New test.
3726
3727 2021-05-24  François Dumont  <fdumont@gcc.gnu.org>
3728
3729         PR libstdc++/96088
3730         * include/bits/hashtable_policy.h (_Select2nd): New.
3731         (_NodeBuilder<>): New.
3732         (_ReuseOrAllocNode<>::operator()): Use variadic template args.
3733         (_AllocNode<>::operator()): Likewise.
3734         * include/bits/hashtable.h
3735         (_Hashtable<>::__node_builder_t): New.
3736         (_Hashtable<>::_M_insert_unique<>(_Kt&&, _Arg&&, const _NodeGenerator&)):
3737          New.
3738         (_Hashtable<>::_S_forward_key): New.
3739         (_Hashtable<>::_M_insert): Use latter.
3740         (_Hashtable<>::_M_insert(const_iterator, _Arg&&, const _NodeGenerator&, false_type)):
3741         Instantiate node first, compute hash code second.
3742         * testsuite/23_containers/unordered_map/96088.cc: New test.
3743         * testsuite/23_containers/unordered_multimap/96088.cc: New test.
3744         * testsuite/23_containers/unordered_multiset/96088.cc: New test.
3745         * testsuite/23_containers/unordered_set/96088.cc: New test.
3746         * testsuite/util/replacement_memory_operators.h
3747         (counter::_M_increment): New.
3748         (counter::_M_decrement): New.
3749         (counter::reset()): New.
3750
3751 2021-05-24  Patrick Palka  <ppalka@redhat.com>
3752
3753         PR libstdc++/100479
3754         * include/std/ranges (__detail::__non_propagating_cache): Move
3755         definition up to before that of _CachedPosition.  Make base
3756         class _Optional_base protected instead of private.  Add const
3757         overload for operator*.
3758         (__detail::_CachedPosition): Rewrite the partial specialization
3759         for forward ranges as a derived class of __non_propagating_cache.
3760         Remove the size constraint on the partial specialization for
3761         random access ranges.  Add copy/move/copy-assignment/move-assignment
3762         members to the offset partial specialization for random
3763         access ranges that propagate the cached value but additionally
3764         invalidate it in the source object on move.
3765         * testsuite/std/ranges/adaptors/100479.cc: New test.
3766
3767 2021-05-24  Jonathan Wakely  <jwakely@redhat.com>
3768
3769         * testsuite/25_algorithms/inplace_merge/constrained.cc: Qualify
3770         call to ranges::next.
3771         * testsuite/25_algorithms/is_sorted/constrained.cc: Likewise.
3772         * testsuite/25_algorithms/is_sorted_until/constrained.cc:
3773         Likewise.
3774         * testsuite/25_algorithms/swap_ranges/1.cc: Qualify call to
3775         swap_ranges.
3776
3777 2021-05-21  Patrick Palka  <ppalka@redhat.com>
3778
3779         PR libstdc++/100606
3780         * include/std/ranges (drop_while_view::begin): Assert the
3781         precondition added by LWG 3490.
3782
3783 2021-05-21  Patrick Palka  <ppalka@redhat.com>
3784
3785         PR libstdc++/100690
3786         * include/std/ranges (iota_view::_Sentinel::_M_distance_from):
3787         Split out this member function from ...
3788         (iota_view::_Sentinel::operator-): ... here, for sake of access
3789         control.
3790         * testsuite/std/ranges/iota/iota_view.cc (test05): New test.
3791
3792 2021-05-20  Jonathan Wakely  <jwakely@redhat.com>
3793
3794         * include/bits/random.tcc (__representable_as_double)
3795         (__p1_representable_as_double): Add "" to static asserts.
3796
3797 2021-05-20  Jonathan Wakely  <jwakely@redhat.com>
3798
3799         PR libstdc++/100676
3800         * include/bits/c++config (__glibcxx_assert_1): Rename to ...
3801         (__glibcxx_constexpr_assert): ... this.
3802         (__glibcxx_assert_impl): Use __glibcxx_constexpr_assert.
3803         (__glibcxx_assert): Define as either __glibcxx_constexpr_assert
3804         or __glibcxx_assert_impl.
3805         (__glibcxx_assert_2): Remove
3806         * include/debug/macros.h (_GLIBCXX_DEBUG_VERIFY_AT_F): Use
3807         __glibcxx_constexpr_assert instead of __glibcxx_assert_1.
3808         * testsuite/21_strings/basic_string_view/element_access/char/back_constexpr_neg.cc:
3809         Adjust expected error.
3810         * testsuite/21_strings/basic_string_view/element_access/char/constexpr_neg.cc:
3811         Likewise.
3812         * testsuite/21_strings/basic_string_view/element_access/char/front_constexpr_neg.cc:
3813         Likewise.
3814         Likewise.
3815         * testsuite/21_strings/basic_string_view/element_access/wchar_t/back_constexpr_neg.cc:
3816         Likewise.
3817         * testsuite/21_strings/basic_string_view/element_access/wchar_t/constexpr_neg.cc:
3818         Likewise.
3819         * testsuite/21_strings/basic_string_view/element_access/wchar_t/front_constexpr_neg.cc:
3820         Likewise.
3821         * testsuite/23_containers/span/back_neg.cc: Likewise.
3822         * testsuite/23_containers/span/front_neg.cc: Likewise.
3823         * testsuite/23_containers/span/index_op_neg.cc: Likewise.
3824
3825 2021-05-20  Patrick Palka  <ppalka@redhat.com>
3826
3827         PR libstdc++/100639
3828         * include/bits/stl_iterator.h (reverse_iterator::difference_type):
3829         In C++20 mode, define in terms of iter_difference_t as per P0896R4.
3830         (reverse_iterator::reference): Likewise, but with iter_reference_t.
3831         (reverse_iterator::value_type): Likewise, but with iter_value_t.
3832         * testsuite/std/ranges/adaptors/reverse.cc (test08): New test.
3833         * testsuite/24_iterators/reverse_iterator/100639.cc: New test.
3834
3835 2021-05-20  Joern Rennecke  <joern.rennecke@riscy-ip.com>
3836
3837         PR libstdc++/100361
3838         * include/std/charconv (to_chars): Hide the overloads for
3839         floating-point types for 16 bit targets.
3840         * src/c++17/floating_to_chars.cc: Don't compile for 16 bit targets.
3841         * testsuite/20_util/to_chars/double.cc: Run this test only on
3842         size32plus targets.
3843         * testsuite/20_util/to_chars/float.cc: Likewise.
3844         * testsuite/20_util/to_chars/long_double.cc: Likewise.
3845
3846 2021-05-18  Patrick Palka  <ppalka@redhat.com>
3847
3848         PR libstdc++/100631
3849         * include/std/ranges (elements_view::_Sentinel::operator-): Use
3850         _M_distance_from in the other operator- overload too.
3851         * testsuite/std/ranges/adaptors/elements.cc (test06): Augment test.
3852
3853 2021-05-18  Thomas Schwinge  <thomas@codesourcery.com>
3854
3855         * testsuite/lib/prune.exp: Add note about 'dg-note'.
3856
3857 2021-05-18  Patrick Palka  <ppalka@redhat.com>
3858
3859         PR libstdc++/100475
3860         * include/std/ranges (__box::__box): Use non-list-initialization
3861         in member initializer list of in-place constructor of the
3862         partial specialization for semiregular types.
3863         (__box::operator->): Use std::__addressof.
3864         * testsuite/std/ranges/adaptors/detail/semiregular_box.cc
3865         (test02): New test.
3866         * testsuite/std/ranges/single_view.cc (test04): New test.
3867
3868 2021-05-18  Patrick Palka  <ppalka@redhat.com>
3869
3870         PR libstdc++/100621
3871         * include/std/ranges (reverse_view::_S_needs_cached_begin):
3872         Set to true if the underlying non-common random-access range
3873         doesn't have a sized sentinel.
3874
3875 2021-05-18  Patrick Palka  <ppalka@redhat.com>
3876
3877         PR libstdc++/100631
3878         * include/std/ranges (elements_view::_Iterator): Also befriend
3879         _Sentinel<!_Const>.
3880         (elements_view::_Sentinel::_M_equal): Templatize.
3881         (elements_view::_Sentinel::_M_distance_from): Split out from ...
3882         (elements_view::_Sentinel::operator-): ... here.  Depend on
3883         _Base2 instead of _Base in the return type.
3884         * testsuite/std/ranges/adaptors/elements.cc (test06, test07):
3885         New tests.
3886
3887 2021-05-17  Thomas Rodgers  <rodgert@twrodgers.com>
3888
3889         * include/bits/atomic_wait.h (__waiter::_M_do_wait_v): loop
3890         until value change observed.
3891         (__waiter_base::_M_laundered): New member.
3892         (__waiter_base::_M_notify): Check _M_laundered to determine
3893         whether to wake one or all.
3894         (__detail::__atomic_compare): Return true if call to
3895         __builtin_memcmp() == 0.
3896         (__waiter_base::_S_do_spin_v): Adjust predicate.
3897         * testsuite/29_atomics/atomic/wait_notify/100334.cc: New
3898         test.
3899
3900 2021-05-17  Jonathan Wakely  <jwakely@redhat.com>
3901
3902         PR libstdc++/100630
3903         * include/experimental/bits/fs_path.h (__is_constructible_from):
3904         Test construction from a const lvalue, not an rvalue.
3905         * testsuite/27_io/filesystem/path/construct/100630.cc: New test.
3906         * testsuite/experimental/filesystem/path/construct/100630.cc:
3907         New test.
3908
3909 2021-05-17  Antony Polukhin  <antoshkka@gmail.com>
3910
3911         PR libstdc++/89728
3912         * include/bits/locale_facets.h (ctype<basic_string<C,T,A>>):
3913         Declare (but do not define) partial specialization.
3914         * testsuite/22_locale/ctype/is/string/89728_neg.cc: New test.
3915
3916 2021-05-17  Jonathan Wakely  <jwakely@redhat.com>
3917
3918         * include/std/thread (jthread::_S_create): Fix static assert
3919         message.
3920         * testsuite/30_threads/jthread/95989.cc: Re-enable test.
3921         * testsuite/30_threads/jthread/jthread.cc: Do not require
3922         pthread effective target.
3923         * testsuite/30_threads/jthread/2.cc: Moved to...
3924         * testsuite/30_threads/jthread/version.cc: ...here.
3925
3926 2021-05-17  Jonathan Wakely  <jwakely@redhat.com>
3927
3928         * doc/Makefile.am: Simplify doxygen recipes and use --latex_cmd.
3929         * doc/Makefile.in: Regenerate.
3930         * doc/doxygen/user.cfg.in (LATEX_CMD_NAME): Add placeholder
3931         value.
3932         * scripts/run_doxygen (print_usage): Always print to stdout and
3933         do not exit.
3934         (fail): New function for exiting on error.
3935         (parse_options): Handle --latex_cmd. Do not treat --help the
3936         same as errors. Simplify handling of required arguments.
3937
3938 2021-05-12  Jonathan Wakely  <jwakely@redhat.com>
3939
3940         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_end.cc:
3941         Increase dg-timeout-factor to 4. Fix -Wunused-parameter
3942         warnings. Replace bitwise AND with logical AND in loop
3943         condition.
3944         * testsuite/25_algorithms/pstl/alg_nonmodifying/search_n.cc:
3945         Replace bitwise AND with logical AND in loop condition.
3946         * testsuite/util/pstl/test_utils.h: Remove unused parameter
3947         names.
3948
3949 2021-05-11  Patrick Palka  <ppalka@redhat.com>
3950
3951         * src/c++17/ryu/LOCAL_PATCHES: Update.
3952         * src/c++17/ryu/ryu_generic_128.h: Remove extern "C".
3953         Remove declarations for never-defined functions.
3954         * testsuite/20_util/to_chars/4.cc: New test.
3955
3956 2021-05-11  Jonathan Wakely  <jwakely@redhat.com>
3957
3958         * testsuite/20_util/headers/memory/synopsis.cc: Define C++98
3959         alternative for macro.
3960         * testsuite/20_util/shared_ptr/creation/99006.cc: Add effective
3961         target keyword.
3962         * testsuite/25_algorithms/copy/debug/99402.cc: Avoid C++11
3963         syntax.
3964
3965 2021-05-11  Jonathan Wakely  <jwakely@redhat.com>
3966
3967         * include/bits/allocator.h (allocator<void>) [C++20]: Add
3968         missing noexcept to constructor. Restore missing POCMA and
3969         is_always_equal_traits.
3970         [C++17]: Make construct and destroy members private and
3971         declare allocator_traits as a friend.
3972         * include/bits/memoryfwd.h (allocator_traits): Declare.
3973         * include/ext/malloc_allocator.h (malloc_allocator::allocate):
3974         Add nodiscard attribute. Add static assertion for LWG 3307.
3975         * include/ext/new_allocator.h (new_allocator::allocate): Add
3976         static assertion for LWG 3307.
3977         * testsuite/20_util/allocator/void.cc: Check that converting
3978         constructor is noexcept. Check for propagation traits and
3979         size_type and difference_type. Check that pointer and
3980         const_pointer are gone in C++20.
3981
3982 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
3983
3984         * include/std/stop_token: Remove TODO comment.
3985
3986 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
3987
3988         * include/bits/shared_ptr_base.h (__shared_count(unique_ptr&&)):
3989         Initialize a non-reference deleter from an rvalue, as per LWG
3990         3548.
3991         (__shared_ptr::_UniqCompatible): Add missing constraint.
3992         * testsuite/20_util/shared_ptr/cons/lwg3548.cc: New test.
3993         * testsuite/20_util/shared_ptr/cons/unique_ptr_deleter.cc: Check
3994         constraints.
3995
3996 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
3997
3998         * testsuite/17_intro/headers/c++2017/all_attributes.cc: Remove
3999         -std=gnu++17 from dg-options directive.
4000         * testsuite/17_intro/headers/c++2017/all_no_exceptions.cc:
4001         Likewise.
4002         * testsuite/17_intro/headers/c++2017/all_pedantic_errors.cc:
4003         Likewise.
4004         * testsuite/17_intro/headers/c++2017/operator_names.cc:
4005         Likewise.
4006         * testsuite/17_intro/headers/c++2017/parallel_mode.cc: Likewise.
4007         * testsuite/17_intro/headers/c++2017/stdc++.cc: Likewise.
4008         * testsuite/17_intro/headers/c++2017/stdc++_multiple_inclusion.cc:
4009         Likewise.
4010         * testsuite/18_support/aligned_alloc/aligned_alloc.cc: Likewise.
4011         * testsuite/18_support/byte/81076.cc: Likewise.
4012         * testsuite/18_support/byte/global_neg.cc: Likewise.
4013         * testsuite/18_support/byte/ops.cc: Likewise.
4014         * testsuite/18_support/byte/requirements.cc: Likewise.
4015         * testsuite/18_support/headers/cfloat/values_c++17.cc: Likewise.
4016         * testsuite/18_support/launder/1.cc: Likewise.
4017         * testsuite/18_support/launder/nodiscard.cc: Likewise.
4018         * testsuite/18_support/launder/requirements.cc: Likewise.
4019         * testsuite/18_support/launder/requirements_neg.cc: Likewise.
4020         * testsuite/18_support/new_aligned.cc: Likewise.
4021         * testsuite/18_support/uncaught_exceptions/uncaught_exceptions.cc:
4022         Likewise.
4023         * testsuite/19_diagnostics/error_code/is_error_code_v.cc:
4024         Likewise.
4025         * testsuite/19_diagnostics/error_condition/hash.cc: Likewise.
4026         * testsuite/20_util/addressof/requirements/constexpr.cc:
4027         Likewise.
4028         * testsuite/20_util/as_const/1.cc: Likewise.
4029         * testsuite/20_util/as_const/rvalue_neg.cc: Likewise.
4030         * testsuite/20_util/bind/83427.cc: Likewise.
4031         * testsuite/20_util/bind/is_placeholder_v.cc: Likewise.
4032         * testsuite/20_util/bool_constant/requirements.cc: Likewise.
4033         * testsuite/20_util/duration/arithmetic/constexpr_c++17.cc:
4034         Likewise.
4035         * testsuite/20_util/duration/requirements/treat_as_floating_point_v.cc:
4036         Likewise.
4037         * testsuite/20_util/duration_cast/rounding.cc: Likewise.
4038         * testsuite/20_util/enable_shared_from_this/members/weak_from_this.cc:
4039         Likewise.
4040         * testsuite/20_util/from_chars/1_neg.cc: Likewise.
4041         * testsuite/20_util/from_chars/requirements.cc: Likewise.
4042         * testsuite/20_util/function/91456.cc: Likewise.
4043         * testsuite/20_util/function/cons/deduction.cc: Likewise.
4044         * testsuite/20_util/function_objects/83607.cc: Likewise.
4045         * testsuite/20_util/function_objects/invoke/59768.cc: Likewise.
4046         * testsuite/20_util/function_objects/mem_fn/80478.cc: Likewise.
4047         * testsuite/20_util/function_objects/not_fn/1.cc: Likewise.
4048         * testsuite/20_util/function_objects/not_fn/87538.cc: Likewise.
4049         * testsuite/20_util/has_unique_object_representations/requirements/explicit_instantiation.cc:
4050         Likewise.
4051         * testsuite/20_util/has_unique_object_representations/requirements/typedefs.cc:
4052         Likewise.
4053         * testsuite/20_util/has_unique_object_representations/value.cc:
4054         Likewise.
4055         * testsuite/20_util/hash/nullptr.cc: Likewise.
4056         * testsuite/20_util/in_place/requirements.cc: Likewise.
4057         * testsuite/20_util/is_aggregate/incomplete_neg.cc: Likewise.
4058         * testsuite/20_util/is_aggregate/requirements/explicit_instantiation.cc:
4059         Likewise.
4060         * testsuite/20_util/is_aggregate/requirements/typedefs.cc:
4061         Likewise.
4062         * testsuite/20_util/is_aggregate/value.cc: Likewise.
4063         * testsuite/20_util/is_invocable/83395.cc: Likewise.
4064         * testsuite/20_util/is_invocable/91456.cc: Likewise.
4065         * testsuite/20_util/is_invocable/requirements/explicit_instantiation.cc:
4066         Likewise.
4067         * testsuite/20_util/is_invocable/requirements/typedefs.cc:
4068         Likewise.
4069         * testsuite/20_util/is_invocable/value.cc: Likewise.
4070         * testsuite/20_util/is_literal_type/deprecated-1z.cc: Likewise.
4071         * testsuite/20_util/is_nothrow_constructible/94003.cc: Likewise.
4072         * testsuite/20_util/is_nothrow_invocable/83395.cc: Likewise.
4073         * testsuite/20_util/is_nothrow_invocable/requirements/explicit_instantiation.cc:
4074         Likewise.
4075         * testsuite/20_util/is_nothrow_invocable/requirements/typedefs.cc: Likewise.
4076         * testsuite/20_util/is_nothrow_invocable/value.cc: Likewise.
4077         * testsuite/20_util/is_nothrow_swappable/requirements/explicit_instantiation.cc:
4078         Likewise.
4079         * testsuite/20_util/is_nothrow_swappable/requirements/typedefs.cc:
4080         Likewise.
4081         * testsuite/20_util/is_nothrow_swappable/value.cc: Likewise.
4082         * testsuite/20_util/is_nothrow_swappable_with/requirements/explicit_instantiation.cc:
4083         Likewise.
4084         * testsuite/20_util/is_nothrow_swappable_with/requirements/typedefs.cc:
4085         Likewise.
4086         * testsuite/20_util/is_nothrow_swappable_with/value.cc:
4087         Likewise.
4088         * testsuite/20_util/is_swappable/requirements/explicit_instantiation.cc:
4089         Likewise.
4090         * testsuite/20_util/is_swappable/requirements/typedefs.cc:
4091         Likewise.
4092         * testsuite/20_util/is_swappable/value.cc: Likewise.
4093         * testsuite/20_util/is_swappable_with/requirements/explicit_instantiation.cc:
4094         Likewise.
4095         * testsuite/20_util/is_swappable_with/requirements/typedefs.cc:
4096         Likewise.
4097         * testsuite/20_util/is_swappable_with/value.cc: Likewise.
4098         * testsuite/20_util/logical_traits/83134.cc: Likewise.
4099         * testsuite/20_util/logical_traits/requirements/explicit_instantiation.cc:
4100         Likewise.
4101         * testsuite/20_util/logical_traits/requirements/typedefs.cc:
4102         Likewise.
4103         * testsuite/20_util/logical_traits/value.cc: Likewise.
4104         * testsuite/20_util/pair/cons/deduction.cc: Likewise.
4105         * testsuite/20_util/pair/swap_cxx17.cc: Likewise.
4106         * testsuite/20_util/ratio/requirements/ratio_equal_v.cc:
4107         Likewise.
4108         * testsuite/20_util/reference_wrapper/83427.cc: Likewise.
4109         * testsuite/20_util/reference_wrapper/deduction.cc: Likewise.
4110         * testsuite/20_util/shared_ptr/casts/reinterpret.cc: Likewise.
4111         * testsuite/20_util/shared_ptr/cons/deduction.cc: Likewise.
4112         * testsuite/20_util/shared_ptr/requirements/weak_type.cc:
4113         Likewise.
4114         * testsuite/20_util/time_point/arithmetic/constexpr.cc:
4115         Likewise.
4116         * testsuite/20_util/time_point_cast/rounding.cc: Likewise.
4117         * testsuite/20_util/to_chars/3.cc: Likewise.
4118         * testsuite/20_util/to_chars/chars_format.cc: Likewise.
4119         * testsuite/20_util/to_chars/lwg3266.cc: Likewise.
4120         * testsuite/20_util/to_chars/requirements.cc: Likewise.
4121         * testsuite/20_util/tuple/78939.cc: Likewise.
4122         * testsuite/20_util/tuple/apply/1.cc: Likewise.
4123         * testsuite/20_util/tuple/apply/2.cc: Likewise.
4124         * testsuite/20_util/tuple/cons/deduction.cc: Likewise.
4125         * testsuite/20_util/tuple/make_from_tuple/1.cc: Likewise.
4126         * testsuite/20_util/tuple/make_from_tuple/2.cc: Likewise.
4127         * testsuite/20_util/tuple/swap_cxx17.cc: Likewise.
4128         * testsuite/20_util/tuple/tuple_size_v.cc: Likewise.
4129         * testsuite/20_util/unique_ptr/cons/deduction_neg.cc: Likewise.
4130         * testsuite/20_util/uses_allocator/requirements/uses_allocator_v.cc:
4131         Likewise.
4132         * testsuite/20_util/variable_templates_for_traits.cc: Likewise.
4133         * testsuite/20_util/void_t/1.cc: Likewise.
4134         * testsuite/20_util/weak_ptr/cons/deduction.cc: Likewise.
4135         * testsuite/24_iterators/container_access.cc: Likewise.
4136         * testsuite/24_iterators/headers/iterator/range_access_c++17.cc:
4137         Likewise.
4138         * testsuite/24_iterators/headers/iterator/synopsis_c++17.cc:
4139         Likewise.
4140         * testsuite/24_iterators/range_access/range_access_cpp17.cc:
4141         Likewise.
4142         * testsuite/24_iterators/range_access/range_access_cpp17_neg.cc:
4143         Likewise.
4144         * testsuite/26_numerics/gcd/gcd_neg.cc: Likewise.
4145         * testsuite/26_numerics/headers/cmath/functions_std_c++17.cc:
4146         Likewise.
4147         * testsuite/26_numerics/headers/cmath/hypot.cc: Likewise.
4148         * testsuite/26_numerics/headers/cmath/special_functions_global.cc:
4149         Likewise.
4150         * testsuite/26_numerics/lcm/1.cc: Likewise.
4151         * testsuite/26_numerics/lcm/lcm_neg.cc: Likewise.
4152         * testsuite/26_numerics/valarray/deduction.cc: Likewise.
4153         * testsuite/27_io/basic_ostream/inserters_other/char/lwg2221.cc:
4154         Likewise.
4155         * testsuite/27_io/manipulators/standard/char/quoted_sv.cc:
4156         Likewise.
4157         * testsuite/27_io/manipulators/standard/wchar_t/quoted_sv.cc:
4158         Likewise.
4159         * testsuite/27_io/types/4.cc: Likewise.
4160         * testsuite/28_regex/basic_regex/ctors/deduction.cc: Likewise.
4161         * testsuite/libstdc++-prettyprinters/91997.cc: Likewise.
4162         * testsuite/libstdc++-prettyprinters/cxx17.cc: Likewise.
4163
4164 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
4165
4166         * testsuite/20_util/function_objects/searchers.cc: Remove
4167         -std=gnu++17 from dg-options directive.
4168         * testsuite/20_util/specialized_algorithms/memory_management_tools/1.cc:
4169         Likewise.
4170         * testsuite/20_util/specialized_algorithms/memory_management_tools/destroy_neg.cc:
4171         Likewise.
4172         * testsuite/20_util/specialized_algorithms/uninitialized_value_construct/94540.cc:
4173         Likewise.
4174         * testsuite/20_util/specialized_algorithms/uninitialized_value_construct/94831.cc:
4175         Likewise.
4176         * testsuite/20_util/specialized_algorithms/uninitialized_value_construct_n/94540.cc:
4177         Likewise.
4178         * testsuite/20_util/specialized_algorithms/uninitialized_value_construct_n/sizes.cc:
4179         Likewise.
4180         * testsuite/20_util/unique_ptr/specialized_algorithms/swap_cxx17.cc:
4181         Likewise.
4182         * testsuite/25_algorithms/clamp/1.cc: Likewise.
4183         * testsuite/25_algorithms/clamp/2.cc: Likewise.
4184         * testsuite/25_algorithms/clamp/constexpr.cc: Likewise.
4185         * testsuite/25_algorithms/clamp/requirements/explicit_instantiation/1.cc:
4186         Likewise.
4187         * testsuite/25_algorithms/clamp/requirements/explicit_instantiation/pod.cc:
4188         Likewise.
4189         * testsuite/25_algorithms/for_each/for_each_n.cc: Likewise.
4190         * testsuite/25_algorithms/for_each/for_each_n_debug.cc:
4191         Likewise.
4192         * testsuite/25_algorithms/sample/1.cc: Likewise.
4193         * testsuite/25_algorithms/sample/2.cc: Likewise.
4194         * testsuite/25_algorithms/sample/3.cc: Likewise.
4195         * testsuite/25_algorithms/sample/81221.cc: Likewise.
4196         * testsuite/25_algorithms/search/searcher.cc: Likewise.
4197         * testsuite/26_numerics/exclusive_scan/1.cc: Likewise.
4198         * testsuite/26_numerics/inclusive_scan/1.cc: Likewise.
4199         * testsuite/26_numerics/reduce/1.cc: Likewise.
4200         * testsuite/26_numerics/reduce/2.cc: Likewise.
4201         * testsuite/26_numerics/transform_exclusive_scan/1.cc: Likewise.
4202         * testsuite/26_numerics/transform_inclusive_scan/1.cc: Likewise.
4203         * testsuite/26_numerics/transform_reduce/1.cc: Likewise.
4204
4205 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
4206
4207         * testsuite/23_containers/array/cons/deduction.cc: Remove
4208         -std=gnu++17 from dg-options directive.
4209         * testsuite/23_containers/array/cons/deduction_neg.cc: Likewise.
4210         * testsuite/23_containers/array/element_access/constexpr_c++17.cc:
4211         Likewise.
4212         * testsuite/23_containers/array/requirements/constexpr_iter.cc:
4213         Likewise.
4214         * testsuite/23_containers/array/specialized_algorithms/swap_cxx17.cc:
4215         Likewise.
4216         * testsuite/23_containers/deque/cons/deduction.cc: Likewise.
4217         * testsuite/23_containers/deque/modifiers/emplace/cxx17_return.cc:
4218         Likewise.
4219         * testsuite/23_containers/forward_list/cons/deduction.cc:
4220         Likewise.
4221         * testsuite/23_containers/forward_list/modifiers/emplace_cxx17_return.cc:
4222         Likewise.
4223         * testsuite/23_containers/list/cons/deduction.cc: Likewise.
4224         * testsuite/23_containers/list/modifiers/emplace/cxx17_return.cc:
4225         Likewise.
4226         * testsuite/23_containers/map/cons/deduction.cc: Likewise.
4227         * testsuite/23_containers/map/modifiers/extract.cc: Likewise.
4228         * testsuite/23_containers/map/modifiers/insert/83226.cc:
4229         Likewise.
4230         * testsuite/23_containers/map/modifiers/insert_or_assign/1.cc:
4231         Likewise.
4232         * testsuite/23_containers/map/modifiers/merge.cc: Likewise.
4233         * testsuite/23_containers/map/modifiers/try_emplace/1.cc:
4234         Likewise.
4235         * testsuite/23_containers/multimap/cons/deduction.cc: Likewise.
4236         * testsuite/23_containers/multimap/modifiers/extract.cc:
4237         Likewise.
4238         * testsuite/23_containers/multimap/modifiers/merge.cc: Likewise.
4239         * testsuite/23_containers/multiset/cons/deduction.cc: Likewise.
4240         * testsuite/23_containers/multiset/modifiers/extract.cc:
4241         Likewise.
4242         * testsuite/23_containers/multiset/modifiers/merge.cc: Likewise.
4243         * testsuite/23_containers/priority_queue/deduction.cc: Likewise.
4244         * testsuite/23_containers/queue/deduction.cc: Likewise.
4245         * testsuite/23_containers/queue/members/emplace_cxx17_return.cc:
4246         Likewise.
4247         * testsuite/23_containers/set/cons/deduction.cc: Likewise.
4248         * testsuite/23_containers/set/modifiers/extract.cc: Likewise.
4249         * testsuite/23_containers/set/modifiers/merge.cc: Likewise.
4250         * testsuite/23_containers/set/modifiers/node_swap.cc: Likewise.
4251         * testsuite/23_containers/stack/deduction.cc: Likewise.
4252         * testsuite/23_containers/stack/members/emplace_cxx17_return.cc:
4253         Likewise.
4254         * testsuite/23_containers/unordered_map/cons/deduction.cc:
4255         Likewise.
4256         * testsuite/23_containers/unordered_map/modifiers/extract.cc:
4257         Likewise.
4258         * testsuite/23_containers/unordered_map/modifiers/insert_or_assign.cc:
4259         Likewise.
4260         * testsuite/23_containers/unordered_map/modifiers/merge.cc:
4261         Likewise.
4262         * testsuite/23_containers/unordered_map/modifiers/try_emplace.cc:
4263         Likewise.
4264         * testsuite/23_containers/unordered_multimap/cons/deduction.cc:
4265         Likewise.
4266         * testsuite/23_containers/unordered_multimap/modifiers/extract.cc:
4267         Likewise.
4268         * testsuite/23_containers/unordered_multimap/modifiers/merge.cc:
4269         Likewise.
4270         * testsuite/23_containers/unordered_multiset/cons/deduction.cc:
4271         Likewise.
4272         * testsuite/23_containers/unordered_multiset/modifiers/extract.cc:
4273         Likewise.
4274         * testsuite/23_containers/unordered_multiset/modifiers/merge.cc:
4275         Likewise.
4276         * testsuite/23_containers/unordered_set/cons/deduction.cc:
4277         Likewise.
4278         * testsuite/23_containers/unordered_set/modifiers/extract.cc:
4279         Likewise.
4280         * testsuite/23_containers/unordered_set/modifiers/merge.cc:
4281         Likewise.
4282         * testsuite/23_containers/vector/bool/emplace_cxx17_return.cc:
4283         Likewise.
4284         * testsuite/23_containers/vector/cons/89164_c++17.cc: Likewise.
4285         * testsuite/23_containers/vector/cons/deduction.cc: Likewise.
4286         * testsuite/23_containers/vector/modifiers/emplace/cxx17_return.cc:
4287         Likewise.
4288
4289 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
4290
4291         * testsuite/21_strings/basic_string/79162.cc: Remove
4292         -std=gnu++17 from dg-options directive.
4293         * testsuite/21_strings/basic_string/cons/char/7.cc: Likewise.
4294         * testsuite/21_strings/basic_string/cons/char/79162.cc:
4295         Likewise.
4296         * testsuite/21_strings/basic_string/cons/char/86138.cc:
4297         Likewise.
4298         * testsuite/21_strings/basic_string/cons/char/9.cc: Likewise.
4299         * testsuite/21_strings/basic_string/cons/char/deduction.cc:
4300         Likewise.
4301         * testsuite/21_strings/basic_string/cons/char/moveable2_c++17.cc:
4302         Likewise.
4303         * testsuite/21_strings/basic_string/cons/wchar_t/7.cc: Likewise.
4304         * testsuite/21_strings/basic_string/cons/wchar_t/79162.cc:
4305         Likewise.
4306         * testsuite/21_strings/basic_string/cons/wchar_t/86138.cc:
4307         Likewise.
4308         * testsuite/21_strings/basic_string/cons/wchar_t/9.cc: Likewise.
4309         * testsuite/21_strings/basic_string/cons/wchar_t/deduction.cc:
4310         Likewise.
4311         * testsuite/21_strings/basic_string/cons/wchar_t/moveable2_c++17.cc:
4312         Likewise.
4313         * testsuite/21_strings/basic_string/hash/hash.cc: Likewise.
4314         * testsuite/21_strings/basic_string/lwg2758.cc: Likewise.
4315         * testsuite/21_strings/basic_string/lwg2946.cc: Likewise.
4316         * testsuite/21_strings/basic_string/modifiers/append/char/4.cc:
4317         Likewise.
4318         * testsuite/21_strings/basic_string/modifiers/append/wchar_t/4.cc:
4319         Likewise.
4320         * testsuite/21_strings/basic_string/modifiers/assign/char/4.cc:
4321         Likewise.
4322         * testsuite/21_strings/basic_string/modifiers/assign/wchar_t/4.cc:
4323         Likewise.
4324         * testsuite/21_strings/basic_string/modifiers/insert/char/3.cc:
4325         Likewise.
4326         * testsuite/21_strings/basic_string/modifiers/insert/wchar_t/3.cc:
4327         Likewise.
4328         * testsuite/21_strings/basic_string/modifiers/replace/char/7.cc:
4329         Likewise.
4330         * testsuite/21_strings/basic_string/modifiers/replace/wchar_t/7.cc:
4331         Likewise.
4332         * testsuite/21_strings/basic_string/operations/compare/char/2.cc:
4333         Likewise.
4334         * testsuite/21_strings/basic_string/operations/compare/wchar_t/2.cc:
4335         Likewise.
4336         * testsuite/21_strings/basic_string/operations/data/char/2.cc:
4337         Likewise.
4338         * testsuite/21_strings/basic_string/operations/data/char/86169.cc:
4339         Likewise.
4340         * testsuite/21_strings/basic_string/operations/data/wchar_t/2.cc:
4341         Likewise.
4342         * testsuite/21_strings/basic_string/operations/find/char/5.cc:
4343         Likewise.
4344         * testsuite/21_strings/basic_string/operations/find/wchar_t/5.cc:
4345         Likewise.
4346         * testsuite/21_strings/basic_string/operators/char/5.cc:
4347         Likewise.
4348         * testsuite/21_strings/basic_string/operators/wchar_t/5.cc:
4349         Likewise.
4350         * testsuite/21_strings/basic_string_view/capacity/1.cc:
4351         Likewise.
4352         * testsuite/21_strings/basic_string_view/capacity/empty_neg.cc:
4353         Likewise.
4354         * testsuite/21_strings/basic_string_view/cons/char/1.cc:
4355         Likewise.
4356         * testsuite/21_strings/basic_string_view/cons/char/2.cc:
4357         Likewise.
4358         * testsuite/21_strings/basic_string_view/cons/char/3.cc:
4359         Likewise.
4360         * testsuite/21_strings/basic_string_view/cons/char/nonnull.cc:
4361         Likewise.
4362         * testsuite/21_strings/basic_string_view/cons/wchar_t/1.cc:
4363         Likewise.
4364         * testsuite/21_strings/basic_string_view/cons/wchar_t/2.cc:
4365         Likewise.
4366         * testsuite/21_strings/basic_string_view/cons/wchar_t/3.cc:
4367         Likewise.
4368         * testsuite/21_strings/basic_string_view/cons/wchar_t/nonnull.cc:
4369         Likewise.
4370         * testsuite/21_strings/basic_string_view/element_access/char/1.cc:
4371         Likewise.
4372         * testsuite/21_strings/basic_string_view/element_access/char/2.cc:
4373         Likewise.
4374         * testsuite/21_strings/basic_string_view/element_access/char/back_constexpr_neg.cc:
4375         Likewise.
4376         * testsuite/21_strings/basic_string_view/element_access/char/constexpr.cc:
4377         Likewise.
4378         * testsuite/21_strings/basic_string_view/element_access/char/constexpr_neg.cc:
4379         Likewise.
4380         * testsuite/21_strings/basic_string_view/element_access/char/empty.cc:
4381         Likewise.
4382         * testsuite/21_strings/basic_string_view/element_access/char/front_back.cc:
4383         Likewise.
4384         * testsuite/21_strings/basic_string_view/element_access/char/front_back_constexpr.cc:
4385         Likewise.
4386         * testsuite/21_strings/basic_string_view/element_access/char/front_constexpr_neg.cc:
4387         Likewise.
4388         * testsuite/21_strings/basic_string_view/element_access/wchar_t/1.cc:
4389         Likewise.
4390         * testsuite/21_strings/basic_string_view/element_access/wchar_t/2.cc:
4391         Likewise.
4392         * testsuite/21_strings/basic_string_view/element_access/wchar_t/back_constexpr_neg.cc:
4393         Likewise.
4394         * testsuite/21_strings/basic_string_view/element_access/wchar_t/constexpr.cc:
4395         Likewise.
4396         * testsuite/21_strings/basic_string_view/element_access/wchar_t/constexpr_neg.cc:
4397         Likewise.
4398         * testsuite/21_strings/basic_string_view/element_access/wchar_t/empty.cc:
4399         Likewise.
4400         * testsuite/21_strings/basic_string_view/element_access/wchar_t/front_back.cc:
4401         Likewise.
4402         * testsuite/21_strings/basic_string_view/element_access/wchar_t/front_constexpr_neg.cc:
4403         Likewise.
4404         * testsuite/21_strings/basic_string_view/include.cc: Likewise.
4405         * testsuite/21_strings/basic_string_view/inserters/94051.cc:
4406         Likewise.
4407         * testsuite/21_strings/basic_string_view/inserters/char/1.cc:
4408         Likewise.
4409         * testsuite/21_strings/basic_string_view/inserters/char/2.cc:
4410         Likewise.
4411         * testsuite/21_strings/basic_string_view/inserters/char/3.cc:
4412         Likewise.
4413         * testsuite/21_strings/basic_string_view/inserters/pod/10081-out.cc:
4414         Likewise.
4415         * testsuite/21_strings/basic_string_view/inserters/wchar_t/1.cc:
4416         Likewise.
4417         * testsuite/21_strings/basic_string_view/inserters/wchar_t/2.cc:
4418         Likewise.
4419         * testsuite/21_strings/basic_string_view/inserters/wchar_t/3.cc:
4420         Likewise.
4421         * testsuite/21_strings/basic_string_view/literals/types-char8_t.cc:
4422         Likewise.
4423         * testsuite/21_strings/basic_string_view/literals/types.cc:
4424         Likewise.
4425         * testsuite/21_strings/basic_string_view/literals/values-char8_t.cc:
4426         Likewise.
4427         * testsuite/21_strings/basic_string_view/literals/values.cc:
4428         Likewise.
4429         * testsuite/21_strings/basic_string_view/modifiers/remove_prefix/char/1.cc:
4430         Likewise.
4431         * testsuite/21_strings/basic_string_view/modifiers/remove_prefix/wchar_t/1.cc:
4432         Likewise.
4433         * testsuite/21_strings/basic_string_view/modifiers/remove_suffix/char/1.cc:
4434         Likewise.
4435         * testsuite/21_strings/basic_string_view/modifiers/remove_suffix/wchar_t/1.cc:
4436         Likewise.
4437         * testsuite/21_strings/basic_string_view/modifiers/swap/char/1.cc:
4438         Likewise.
4439         * testsuite/21_strings/basic_string_view/modifiers/swap/wchar_t/1.cc:
4440         Likewise.
4441         * testsuite/21_strings/basic_string_view/operations/compare/char/1.cc:
4442         Likewise.
4443         * testsuite/21_strings/basic_string_view/operations/compare/char/13650.cc:
4444         Likewise.
4445         * testsuite/21_strings/basic_string_view/operations/compare/char/2.cc:
4446         Likewise.
4447         * testsuite/21_strings/basic_string_view/operations/compare/char/70483.cc:
4448         Likewise.
4449         * testsuite/21_strings/basic_string_view/operations/compare/char/nonnull.cc:
4450         Likewise.
4451         * testsuite/21_strings/basic_string_view/operations/compare/wchar_t/1.cc:
4452         Likewise.
4453         * testsuite/21_strings/basic_string_view/operations/compare/wchar_t/13650.cc:
4454         Likewise.
4455         * testsuite/21_strings/basic_string_view/operations/compare/wchar_t/2.cc:
4456         Likewise.
4457         * testsuite/21_strings/basic_string_view/operations/copy/char/1.cc:
4458         Likewise.
4459         * testsuite/21_strings/basic_string_view/operations/copy/char/2.cc:
4460         Likewise.
4461         * testsuite/21_strings/basic_string_view/operations/copy/wchar_t/1.cc:
4462         Likewise.
4463         * testsuite/21_strings/basic_string_view/operations/copy/wchar_t/2.cc:
4464         Likewise.
4465         * testsuite/21_strings/basic_string_view/operations/data/char/1.cc:
4466         Likewise.
4467         * testsuite/21_strings/basic_string_view/operations/data/wchar_t/1.cc:
4468         Likewise.
4469         * testsuite/21_strings/basic_string_view/operations/find/char/1.cc:
4470         Likewise.
4471         * testsuite/21_strings/basic_string_view/operations/find/char/2.cc:
4472         Likewise.
4473         * testsuite/21_strings/basic_string_view/operations/find/char/3.cc:
4474         Likewise.
4475         * testsuite/21_strings/basic_string_view/operations/find/char/4.cc:
4476         Likewise.
4477         * testsuite/21_strings/basic_string_view/operations/find/char/nonnull.cc:
4478         Likewise.
4479         * testsuite/21_strings/basic_string_view/operations/find/wchar_t/1.cc:
4480         Likewise.
4481         * testsuite/21_strings/basic_string_view/operations/find/wchar_t/2.cc:
4482         Likewise.
4483         * testsuite/21_strings/basic_string_view/operations/find/wchar_t/3.cc:
4484         Likewise.
4485         * testsuite/21_strings/basic_string_view/operations/find/wchar_t/4.cc:
4486         Likewise.
4487         * testsuite/21_strings/basic_string_view/operations/rfind/char/1.cc:
4488         Likewise.
4489         * testsuite/21_strings/basic_string_view/operations/rfind/char/2.cc:
4490         Likewise.
4491         * testsuite/21_strings/basic_string_view/operations/rfind/char/3.cc:
4492         Likewise.
4493         * testsuite/21_strings/basic_string_view/operations/rfind/char/nonnull.cc:
4494         Likewise.
4495         * testsuite/21_strings/basic_string_view/operations/rfind/wchar_t/1.cc:
4496         Likewise.
4497         * testsuite/21_strings/basic_string_view/operations/rfind/wchar_t/2.cc:
4498         Likewise.
4499         * testsuite/21_strings/basic_string_view/operations/rfind/wchar_t/3.cc:
4500         Likewise.
4501         * testsuite/21_strings/basic_string_view/operations/string_conversion/1.cc:
4502         Likewise.
4503         * testsuite/21_strings/basic_string_view/operations/substr/char/1.cc:
4504         Likewise.
4505         * testsuite/21_strings/basic_string_view/operations/substr/char/83511.cc:
4506         Likewise.
4507         * testsuite/21_strings/basic_string_view/operations/substr/wchar_t/1.cc:
4508         Likewise.
4509         * testsuite/21_strings/basic_string_view/operations/substr/wchar_t/83511.cc:
4510         Likewise.
4511         * testsuite/21_strings/basic_string_view/operators/char/2.cc:
4512         Likewise.
4513         * testsuite/21_strings/basic_string_view/operators/char/89446.cc:
4514         Likewise.
4515         * testsuite/21_strings/basic_string_view/operators/wchar_t/2.cc:
4516         Likewise.
4517         * testsuite/21_strings/basic_string_view/operators/wchar_t/89446.cc:
4518         Likewise.
4519         * testsuite/21_strings/basic_string_view/range_access/char/1.cc:
4520         Likewise.
4521         * testsuite/21_strings/basic_string_view/range_access/wchar_t/1.cc:
4522         Likewise.
4523         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/1.cc:
4524         Likewise.
4525         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/char/1.cc:
4526         Likewise.
4527         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/char16_t/1.cc:
4528         Likewise.
4529         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/char32_t/1.cc:
4530         Likewise.
4531         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/char8_t/1.cc:
4532         Likewise.
4533         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/wchar_t/1.cc:
4534         Likewise.
4535         * testsuite/21_strings/basic_string_view/requirements/traits_neg.cc:
4536         Likewise.
4537         * testsuite/21_strings/basic_string_view/requirements/typedefs.cc:
4538         Likewise.
4539         * testsuite/21_strings/basic_string_view/typedefs.cc: Likewise.
4540         * testsuite/21_strings/basic_string_view/types/1.cc: Likewise.
4541         * testsuite/21_strings/char_traits/requirements/char/99181.cc:
4542         Likewise.
4543         * testsuite/21_strings/char_traits/requirements/constexpr_functions_c++17.cc:
4544
4545 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
4546
4547         * testsuite/20_util/memory_resource/1.cc: Remove -std=gnu++17
4548         from dg-options directive.
4549         * testsuite/20_util/memory_resource/2.cc: Likewise.
4550         * testsuite/20_util/monotonic_buffer_resource/1.cc: Likewise.
4551         * testsuite/20_util/monotonic_buffer_resource/93208.cc:
4552         Likewise.
4553         * testsuite/20_util/monotonic_buffer_resource/allocate.cc:
4554         Likewise.
4555         * testsuite/20_util/monotonic_buffer_resource/deallocate.cc:
4556         Likewise.
4557         * testsuite/20_util/monotonic_buffer_resource/release.cc:
4558         Likewise.
4559         * testsuite/20_util/monotonic_buffer_resource/upstream_resource.cc:
4560         Likewise.
4561         * testsuite/20_util/polymorphic_allocator/1.cc: Likewise.
4562         * testsuite/20_util/polymorphic_allocator/construct_pair.cc:
4563         Likewise.
4564         * testsuite/20_util/polymorphic_allocator/resource.cc: Likewise.
4565         * testsuite/20_util/polymorphic_allocator/select.cc: Likewise.
4566         * testsuite/20_util/synchronized_pool_resource/allocate.cc:
4567         Likewise.
4568         * testsuite/20_util/synchronized_pool_resource/allocate_single.cc:
4569         Likewise.
4570         * testsuite/20_util/synchronized_pool_resource/cons.cc:
4571         Likewise.
4572         * testsuite/20_util/synchronized_pool_resource/cons_single.cc:
4573         Likewise.
4574         * testsuite/20_util/synchronized_pool_resource/is_equal.cc:
4575         Likewise.
4576         * testsuite/20_util/synchronized_pool_resource/multithreaded.cc:
4577         Likewise.
4578         * testsuite/20_util/synchronized_pool_resource/options.cc:
4579         Likewise.
4580         * testsuite/20_util/synchronized_pool_resource/release.cc:
4581         Likewise.
4582         * testsuite/20_util/synchronized_pool_resource/release_single.cc:
4583         Likewise.
4584         * testsuite/20_util/unsynchronized_pool_resource/allocate-max-chunks.cc:
4585         Likewise.
4586         * testsuite/20_util/unsynchronized_pool_resource/allocate.cc:
4587         Likewise.
4588         * testsuite/20_util/unsynchronized_pool_resource/cons.cc:
4589         Likewise.
4590         * testsuite/20_util/unsynchronized_pool_resource/is_equal.cc:
4591         Likewise.
4592         * testsuite/20_util/unsynchronized_pool_resource/options.cc:
4593         Likewise.
4594         * testsuite/20_util/unsynchronized_pool_resource/release.cc:
4595         Likewise.
4596         * testsuite/21_strings/basic_string/types/pmr_typedefs.cc:
4597         Likewise.
4598         * testsuite/23_containers/deque/types/pmr_typedefs.cc: Likewise.
4599         * testsuite/23_containers/deque/types/pmr_typedefs_debug.cc:
4600         Likewise.
4601         * testsuite/23_containers/forward_list/pmr_typedefs.cc:
4602         Likewise.
4603         * testsuite/23_containers/forward_list/pmr_typedefs_debug.cc:
4604         Likewise.
4605         * testsuite/23_containers/list/pmr_typedefs.cc: Likewise.
4606         * testsuite/23_containers/list/pmr_typedefs_debug.cc: Likewise.
4607         * testsuite/23_containers/map/pmr_typedefs.cc: Likewise.
4608         * testsuite/23_containers/map/pmr_typedefs_debug.cc: Likewise.
4609         * testsuite/23_containers/multimap/pmr_typedefs.cc: Likewise.
4610         * testsuite/23_containers/multimap/pmr_typedefs_debug.cc:
4611         Likewise.
4612         * testsuite/23_containers/multiset/pmr_typedefs.cc: Likewise.
4613         * testsuite/23_containers/multiset/pmr_typedefs_debug.cc:
4614         Likewise.
4615         * testsuite/23_containers/set/pmr_typedefs.cc: Likewise.
4616         * testsuite/23_containers/set/pmr_typedefs_debug.cc: Likewise.
4617         * testsuite/23_containers/unordered_map/pmr_typedefs.cc:
4618         Likewise.
4619         * testsuite/23_containers/unordered_map/pmr_typedefs_debug.cc:
4620         Likewise.
4621         * testsuite/23_containers/unordered_multimap/pmr_typedefs.cc:
4622         Likewise.
4623         * testsuite/23_containers/unordered_multimap/pmr_typedefs_debug.cc:
4624         Likewise.
4625         * testsuite/23_containers/unordered_multiset/pmr_typedefs.cc:
4626         Likewise.
4627         * testsuite/23_containers/unordered_multiset/pmr_typedefs_debug.cc:
4628         Likewise.
4629         * testsuite/23_containers/unordered_set/pmr_typedefs.cc:
4630         Likewise.
4631         * testsuite/23_containers/unordered_set/pmr_typedefs_debug.cc:
4632         Likewise.
4633         * testsuite/23_containers/vector/pmr_typedefs.cc: Likewise.
4634         * testsuite/23_containers/vector/types/pmr_typedefs_debug.cc:
4635         Likewise.
4636         * testsuite/28_regex/match_results/pmr_typedefs.cc: Likewise.
4637
4638 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
4639
4640         * testsuite/29_atomics/atomic/69769.cc: Remove -std=gnu++17 from
4641         dg-options.
4642         * testsuite/29_atomics/atomic/is_always_lock_free.cc:
4643         * testsuite/29_atomics/atomic/requirements/typedefs.cc:
4644         * testsuite/29_atomics/atomic_integral/is_always_lock_free.cc:
4645         * testsuite/29_atomics/atomic_integral/requirements/typedefs.cc:
4646         * testsuite/30_threads/lock_guard/cons/deduction.cc: Likewise.
4647         * testsuite/30_threads/scoped_lock/cons/1.cc: Likewise.
4648         * testsuite/30_threads/scoped_lock/cons/deduction.cc: Likewise.
4649         * testsuite/30_threads/scoped_lock/requirements/explicit_instantiation.cc:
4650         Likewise.
4651         * testsuite/30_threads/scoped_lock/requirements/typedefs.cc:
4652         Likewise.
4653         * testsuite/30_threads/shared_lock/70766.cc: Likewise.
4654         * testsuite/30_threads/shared_mutex/cons/1.cc: Likewise.
4655         * testsuite/30_threads/shared_mutex/cons/assign_neg.cc:
4656         Likewise.
4657         * testsuite/30_threads/shared_mutex/cons/copy_neg.cc: Likewise.
4658         * testsuite/30_threads/shared_mutex/requirements/standard_layout.cc:
4659         Likewise.
4660         * testsuite/30_threads/shared_mutex/try_lock/1.cc: Likewise.
4661         * testsuite/30_threads/shared_mutex/try_lock/2.cc: Likewise.
4662         * testsuite/30_threads/shared_mutex/unlock/1.cc: Likewise.
4663         * testsuite/30_threads/unique_lock/cons/deduction.cc: Likewise.
4664
4665 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
4666
4667         * testsuite/20_util/any/assign/1.cc: Remove -std=gnu++17 from
4668         dg-options directive.
4669         * testsuite/20_util/any/assign/2.cc: Likewise.
4670         * testsuite/20_util/any/assign/emplace.cc: Likewise.
4671         * testsuite/20_util/any/assign/exception.cc: Likewise.
4672         * testsuite/20_util/any/assign/self.cc: Likewise.
4673         * testsuite/20_util/any/cons/1.cc: Likewise.
4674         * testsuite/20_util/any/cons/2.cc: Likewise.
4675         * testsuite/20_util/any/cons/90415.cc: Likewise.
4676         * testsuite/20_util/any/cons/92156.cc: Likewise.
4677         * testsuite/20_util/any/cons/aligned.cc: Likewise.
4678         * testsuite/20_util/any/cons/explicit.cc: Likewise.
4679         * testsuite/20_util/any/cons/in_place.cc: Likewise.
4680         * testsuite/20_util/any/cons/nontrivial.cc: Likewise.
4681         * testsuite/20_util/any/make_any.cc: Likewise.
4682         * testsuite/20_util/any/misc/any_cast.cc: Likewise.
4683         * testsuite/20_util/any/misc/any_cast_neg.cc: Likewise.
4684         * testsuite/20_util/any/misc/any_cast_no_rtti.cc: Likewise.
4685         * testsuite/20_util/any/misc/swap.cc: Likewise.
4686         * testsuite/20_util/any/modifiers/1.cc: Likewise.
4687         * testsuite/20_util/any/modifiers/83658.cc: Likewise.
4688         * testsuite/20_util/any/modifiers/92156.cc: Likewise.
4689         * testsuite/20_util/any/observers/type.cc: Likewise.
4690         * testsuite/20_util/any/requirements.cc: Likewise.
4691         * testsuite/20_util/any/typedefs.cc: Likewise.
4692         * testsuite/20_util/optional/77288.cc: Likewise.
4693         * testsuite/20_util/optional/84601.cc: Likewise.
4694         * testsuite/20_util/optional/assignment/1.cc: Likewise.
4695         * testsuite/20_util/optional/assignment/2.cc: Likewise.
4696         * testsuite/20_util/optional/assignment/3.cc: Likewise.
4697         * testsuite/20_util/optional/assignment/4.cc: Likewise.
4698         * testsuite/20_util/optional/assignment/5.cc: Likewise.
4699         * testsuite/20_util/optional/assignment/6.cc: Likewise.
4700         * testsuite/20_util/optional/assignment/7.cc: Likewise.
4701         * testsuite/20_util/optional/assignment/8.cc: Likewise.
4702         * testsuite/20_util/optional/assignment/9.cc: Likewise.
4703         * testsuite/20_util/optional/bad_access.cc: Likewise.
4704         * testsuite/20_util/optional/cons/77727.cc: Likewise.
4705         * testsuite/20_util/optional/cons/85642.cc: Likewise.
4706         * testsuite/20_util/optional/cons/copy.cc: Likewise.
4707         * testsuite/20_util/optional/cons/deduction.cc: Likewise.
4708         * testsuite/20_util/optional/cons/default.cc: Likewise.
4709         * testsuite/20_util/optional/cons/move.cc: Likewise.
4710         * testsuite/20_util/optional/cons/trivial.cc: Likewise.
4711         * testsuite/20_util/optional/cons/value.cc: Likewise.
4712         * testsuite/20_util/optional/cons/value_neg.cc: Likewise.
4713         * testsuite/20_util/optional/constexpr/cons/default.cc:
4714         Likewise.
4715         * testsuite/20_util/optional/constexpr/cons/value.cc: Likewise.
4716         * testsuite/20_util/optional/constexpr/in_place.cc: Likewise.
4717         * testsuite/20_util/optional/constexpr/make_optional.cc:
4718         Likewise.
4719         * testsuite/20_util/optional/constexpr/nullopt.cc: Likewise.
4720         * testsuite/20_util/optional/constexpr/observers/1.cc: Likewise.
4721         * testsuite/20_util/optional/constexpr/observers/2.cc: Likewise.
4722         * testsuite/20_util/optional/constexpr/observers/3.cc: Likewise.
4723         * testsuite/20_util/optional/constexpr/observers/4.cc: Likewise.
4724         * testsuite/20_util/optional/constexpr/observers/5.cc: Likewise.
4725         * testsuite/20_util/optional/constexpr/relops/1.cc: Likewise.
4726         * testsuite/20_util/optional/constexpr/relops/2.cc: Likewise.
4727         * testsuite/20_util/optional/constexpr/relops/3.cc: Likewise.
4728         * testsuite/20_util/optional/constexpr/relops/4.cc: Likewise.
4729         * testsuite/20_util/optional/constexpr/relops/5.cc: Likewise.
4730         * testsuite/20_util/optional/constexpr/relops/6.cc: Likewise.
4731         * testsuite/20_util/optional/hash.cc: Likewise.
4732         * testsuite/20_util/optional/in_place.cc: Likewise.
4733         * testsuite/20_util/optional/make_optional.cc: Likewise.
4734         * testsuite/20_util/optional/nullopt.cc: Likewise.
4735         * testsuite/20_util/optional/observers/1.cc: Likewise.
4736         * testsuite/20_util/optional/observers/2.cc: Likewise.
4737         * testsuite/20_util/optional/observers/3.cc: Likewise.
4738         * testsuite/20_util/optional/observers/4.cc: Likewise.
4739         * testsuite/20_util/optional/observers/5.cc: Likewise.
4740         * testsuite/20_util/optional/observers/6.cc: Likewise.
4741         * testsuite/20_util/optional/relops/1.cc: Likewise.
4742         * testsuite/20_util/optional/relops/2.cc: Likewise.
4743         * testsuite/20_util/optional/relops/3.cc: Likewise.
4744         * testsuite/20_util/optional/relops/4.cc: Likewise.
4745         * testsuite/20_util/optional/relops/5.cc: Likewise.
4746         * testsuite/20_util/optional/relops/6.cc: Likewise.
4747         * testsuite/20_util/optional/relops/7.cc: Likewise.
4748         * testsuite/20_util/optional/requirements.cc: Likewise.
4749         * testsuite/20_util/optional/swap/1.cc: Likewise.
4750         * testsuite/20_util/optional/swap/2.cc: Likewise.
4751         * testsuite/20_util/optional/typedefs.cc: Likewise.
4752         * testsuite/20_util/variant/80165.cc: Likewise.
4753         * testsuite/20_util/variant/85183.cc: Likewise.
4754         * testsuite/20_util/variant/86874.cc: Likewise.
4755         * testsuite/20_util/variant/87431.cc: Likewise.
4756         * testsuite/20_util/variant/87619.cc: Likewise.
4757         * testsuite/20_util/variant/91807.cc: Likewise.
4758         * testsuite/20_util/variant/any.cc: Likewise.
4759         * testsuite/20_util/variant/compile.cc: Likewise.
4760         * testsuite/20_util/variant/deduction.cc: Likewise.
4761         * testsuite/20_util/variant/exception_safety.cc: Likewise.
4762         * testsuite/20_util/variant/hash.cc: Likewise.
4763         * testsuite/20_util/variant/index_type.cc: Likewise.
4764         * testsuite/20_util/variant/relops/89851.cc: Likewise.
4765         * testsuite/20_util/variant/relops/90008.cc: Likewise.
4766         * testsuite/20_util/variant/run.cc: Likewise.
4767         * testsuite/20_util/variant/visit.cc: Likewise.
4768
4769 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
4770
4771         * testsuite/27_io/basic_filebuf/open/char/path.cc: Remove
4772         -std=gnu++17 from dg-options directive.
4773         * testsuite/27_io/basic_fstream/cons/char/path.cc: Likewise.
4774         * testsuite/27_io/basic_fstream/open/char/path.cc: Likewise.
4775         * testsuite/27_io/basic_ifstream/cons/char/path.cc: Likewise.
4776         * testsuite/27_io/basic_ifstream/open/char/path.cc: Likewise.
4777         * testsuite/27_io/basic_ofstream/cons/char/path.cc: Likewise.
4778         * testsuite/27_io/basic_ofstream/open/char/path.cc: Likewise.
4779         * testsuite/27_io/filesystem/directory_entry/86597.cc: Likewise.
4780         * testsuite/27_io/filesystem/directory_entry/lwg3171.cc:
4781         Likewise.
4782         * testsuite/27_io/filesystem/file_status/1.cc: Likewise.
4783         * testsuite/27_io/filesystem/filesystem_error/cons.cc: Likewise.
4784         * testsuite/27_io/filesystem/filesystem_error/copy.cc: Likewise.
4785         * testsuite/27_io/filesystem/iterators/91067.cc: Likewise.
4786         * testsuite/27_io/filesystem/iterators/caching.cc: Likewise.
4787         * testsuite/27_io/filesystem/iterators/directory_iterator.cc:
4788         Likewise.
4789         * testsuite/27_io/filesystem/iterators/pop.cc: Likewise.
4790         * testsuite/27_io/filesystem/iterators/recursion_pending.cc:
4791         Likewise.
4792         * testsuite/27_io/filesystem/iterators/recursive_directory_iterator.cc:
4793         Likewise.
4794         * testsuite/27_io/filesystem/operations/absolute.cc: Likewise.
4795         * testsuite/27_io/filesystem/operations/all.cc: Likewise.
4796         * testsuite/27_io/filesystem/operations/canonical.cc: Likewise.
4797         * testsuite/27_io/filesystem/operations/copy.cc: Likewise.
4798         * testsuite/27_io/filesystem/operations/copy_file.cc: Likewise.
4799         * testsuite/27_io/filesystem/operations/create_directories.cc:
4800         Likewise.
4801         * testsuite/27_io/filesystem/operations/create_directory.cc:
4802         Likewise.
4803         * testsuite/27_io/filesystem/operations/create_symlink.cc:
4804         Likewise.
4805         * testsuite/27_io/filesystem/operations/current_path.cc:
4806         Likewise.
4807         * testsuite/27_io/filesystem/operations/equivalent.cc: Likewise.
4808         * testsuite/27_io/filesystem/operations/exists.cc: Likewise.
4809         * testsuite/27_io/filesystem/operations/file_size.cc: Likewise.
4810         * testsuite/27_io/filesystem/operations/is_empty.cc: Likewise.
4811         * testsuite/27_io/filesystem/operations/last_write_time.cc:
4812         Likewise.
4813         * testsuite/27_io/filesystem/operations/permissions.cc:
4814         Likewise.
4815         * testsuite/27_io/filesystem/operations/proximate.cc: Likewise.
4816         * testsuite/27_io/filesystem/operations/read_symlink.cc:
4817         Likewise.
4818         * testsuite/27_io/filesystem/operations/relative.cc: Likewise.
4819         * testsuite/27_io/filesystem/operations/remove.cc: Likewise.
4820         * testsuite/27_io/filesystem/operations/remove_all.cc: Likewise.
4821         * testsuite/27_io/filesystem/operations/rename.cc: Likewise.
4822         * testsuite/27_io/filesystem/operations/resize_file.cc:
4823         Likewise.
4824         * testsuite/27_io/filesystem/operations/space.cc: Likewise.
4825         * testsuite/27_io/filesystem/operations/status.cc: Likewise.
4826         * testsuite/27_io/filesystem/operations/symlink_status.cc:
4827         Likewise.
4828         * testsuite/27_io/filesystem/operations/temp_directory_path.cc:
4829         Likewise.
4830         * testsuite/27_io/filesystem/operations/weakly_canonical.cc:
4831         Likewise.
4832         * testsuite/27_io/filesystem/path/append/path.cc: Likewise.
4833         * testsuite/27_io/filesystem/path/append/source.cc: Likewise.
4834         * testsuite/27_io/filesystem/path/assign/assign.cc: Likewise.
4835         * testsuite/27_io/filesystem/path/assign/copy.cc: Likewise.
4836         * testsuite/27_io/filesystem/path/compare/compare.cc: Likewise.
4837         * testsuite/27_io/filesystem/path/compare/lwg2936.cc: Likewise.
4838         * testsuite/27_io/filesystem/path/compare/path.cc: Likewise.
4839         * testsuite/27_io/filesystem/path/compare/strings.cc: Likewise.
4840         * testsuite/27_io/filesystem/path/concat/92853.cc: Likewise.
4841         * testsuite/27_io/filesystem/path/concat/94063.cc: Likewise.
4842         * testsuite/27_io/filesystem/path/concat/path.cc: Likewise.
4843         * testsuite/27_io/filesystem/path/concat/strings.cc: Likewise.
4844         * testsuite/27_io/filesystem/path/construct/80762.cc: Likewise.
4845         * testsuite/27_io/filesystem/path/construct/90281.cc: Likewise.
4846         * testsuite/27_io/filesystem/path/construct/90634.cc: Likewise.
4847         * testsuite/27_io/filesystem/path/construct/copy.cc: Likewise.
4848         * testsuite/27_io/filesystem/path/construct/default.cc:
4849         Likewise.
4850         * testsuite/27_io/filesystem/path/construct/format.cc: Likewise.
4851         * testsuite/27_io/filesystem/path/construct/locale.cc: Likewise.
4852         * testsuite/27_io/filesystem/path/construct/range.cc: Likewise.
4853         * testsuite/27_io/filesystem/path/construct/string_view.cc:
4854         Likewise.
4855         * testsuite/27_io/filesystem/path/decompose/extension.cc:
4856         Likewise.
4857         * testsuite/27_io/filesystem/path/decompose/filename.cc:
4858         Likewise.
4859         * testsuite/27_io/filesystem/path/decompose/parent_path.cc:
4860         Likewise.
4861         * testsuite/27_io/filesystem/path/decompose/relative_path.cc:
4862         Likewise.
4863         * testsuite/27_io/filesystem/path/decompose/root_directory.cc:
4864         Likewise.
4865         * testsuite/27_io/filesystem/path/decompose/root_name.cc:
4866         Likewise.
4867         * testsuite/27_io/filesystem/path/decompose/root_path.cc:
4868         Likewise.
4869         * testsuite/27_io/filesystem/path/decompose/stem.cc: Likewise.
4870         * testsuite/27_io/filesystem/path/factory/u8path-char8_t.cc:
4871         Likewise.
4872         * testsuite/27_io/filesystem/path/factory/u8path.cc: Likewise.
4873         * testsuite/27_io/filesystem/path/generation/normal.cc:
4874         Likewise.
4875         * testsuite/27_io/filesystem/path/generation/normal2.cc:
4876         Likewise.
4877         * testsuite/27_io/filesystem/path/generation/proximate.cc:
4878         Likewise.
4879         * testsuite/27_io/filesystem/path/generation/relative.cc:
4880         Likewise.
4881         * testsuite/27_io/filesystem/path/generic/94242.cc: Likewise.
4882         * testsuite/27_io/filesystem/path/generic/generic_string.cc:
4883         Likewise.
4884         * testsuite/27_io/filesystem/path/generic/utf.cc: Likewise.
4885         * testsuite/27_io/filesystem/path/generic/wchar_t.cc: Likewise.
4886         * testsuite/27_io/filesystem/path/io/dr2989.cc: Likewise.
4887         * testsuite/27_io/filesystem/path/itr/components.cc: Likewise.
4888         * testsuite/27_io/filesystem/path/itr/traversal.cc: Likewise.
4889         * testsuite/27_io/filesystem/path/modifiers/clear.cc: Likewise.
4890         * testsuite/27_io/filesystem/path/modifiers/make_preferred.cc:
4891         Likewise.
4892         * testsuite/27_io/filesystem/path/modifiers/remove_filename.cc:
4893         Likewise.
4894         * testsuite/27_io/filesystem/path/modifiers/replace_extension.cc:
4895         Likewise.
4896         * testsuite/27_io/filesystem/path/modifiers/replace_filename.cc:
4897         Likewise.
4898         * testsuite/27_io/filesystem/path/modifiers/swap.cc: Likewise.
4899         * testsuite/27_io/filesystem/path/native/alloc.cc: Likewise.
4900         * testsuite/27_io/filesystem/path/native/string-char8_t.cc:
4901         Likewise.
4902         * testsuite/27_io/filesystem/path/native/string.cc: Likewise.
4903         * testsuite/27_io/filesystem/path/nonmember/append.cc: Likewise.
4904         * testsuite/27_io/filesystem/path/nonmember/cmp.cc: Likewise.
4905         * testsuite/27_io/filesystem/path/nonmember/hash_value.cc:
4906         Likewise.
4907         * testsuite/27_io/filesystem/path/query/empty.cc: Likewise.
4908         * testsuite/27_io/filesystem/path/query/empty_neg.cc:
4909         * testsuite/27_io/filesystem/path/query/has_extension.cc:
4910         Likewise.
4911         * testsuite/27_io/filesystem/path/query/has_filename.cc:
4912         Likewise.
4913         * testsuite/27_io/filesystem/path/query/has_parent_path.cc:
4914         Likewise.
4915         * testsuite/27_io/filesystem/path/query/has_relative_path.cc:
4916         Likewise.
4917         * testsuite/27_io/filesystem/path/query/has_root_directory.cc:
4918         Likewise.
4919         * testsuite/27_io/filesystem/path/query/has_root_name.cc:
4920         Likewise.
4921         * testsuite/27_io/filesystem/path/query/has_root_path.cc:
4922         Likewise.
4923         * testsuite/27_io/filesystem/path/query/has_stem.cc: Likewise.
4924         * testsuite/27_io/filesystem/path/query/is_absolute.cc:
4925         Likewise.
4926         * testsuite/27_io/filesystem/path/query/is_relative.cc:
4927         Likewise.
4928         * testsuite/experimental/filesystem/path/construct/string_view.cc:
4929         Likewise.
4930
4931 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
4932
4933         * testsuite/20_util/specialized_algorithms/pstl/uninitialized_construct.cc:
4934         Remove -std=gnu++17 from dg-options.
4935         * testsuite/20_util/specialized_algorithms/pstl/uninitialized_copy_move.cc:
4936         Likewise.
4937         * testsuite/20_util/specialized_algorithms/pstl/uninitialized_fill_destroy.cc:
4938         Likewise.
4939         * testsuite/25_algorithms/pstl/alg_merge/inplace_merge.cc:
4940         Likewise.
4941         * testsuite/25_algorithms/pstl/alg_merge/merge.cc: Likewise.
4942         * testsuite/25_algorithms/pstl/alg_modifying_operations/copy_if.cc:
4943         Likewise.
4944         * testsuite/25_algorithms/pstl/alg_modifying_operations/copy_move.cc:
4945         Likewise.
4946         * testsuite/25_algorithms/pstl/alg_modifying_operations/fill.cc:
4947         Likewise.
4948         * testsuite/25_algorithms/pstl/alg_modifying_operations/generate.cc:
4949         Likewise.
4950         * testsuite/25_algorithms/pstl/alg_modifying_operations/is_partitioned.cc:
4951         Likewise.
4952         * testsuite/25_algorithms/pstl/alg_modifying_operations/partition.cc:
4953         Likewise.
4954         * testsuite/25_algorithms/pstl/alg_modifying_operations/partition_copy.cc:
4955         Likewise.
4956         * testsuite/25_algorithms/pstl/alg_modifying_operations/remove.cc:
4957         Likewise.
4958         * testsuite/25_algorithms/pstl/alg_modifying_operations/remove_copy.cc:
4959         Likewise.
4960         * testsuite/25_algorithms/pstl/alg_modifying_operations/replace.cc:
4961         Likewise.
4962         * testsuite/25_algorithms/pstl/alg_modifying_operations/replace_copy.cc:
4963         Likewise.
4964         * testsuite/25_algorithms/pstl/alg_modifying_operations/rotate.cc:
4965         Likewise.
4966         * testsuite/25_algorithms/pstl/alg_modifying_operations/rotate_copy.cc:
4967         Likewise.
4968         * testsuite/25_algorithms/pstl/alg_modifying_operations/swap_ranges.cc:
4969         Likewise.
4970         * testsuite/25_algorithms/pstl/alg_modifying_operations/transform_binary.cc:
4971         Likewise.
4972         * testsuite/25_algorithms/pstl/alg_modifying_operations/transform_unary.cc:
4973         Likewise.
4974         * testsuite/25_algorithms/pstl/alg_modifying_operations/unique.cc:
4975         Likewise.
4976         * testsuite/25_algorithms/pstl/alg_modifying_operations/unique_copy_equal.cc:
4977         Likewise.
4978         * testsuite/25_algorithms/pstl/alg_nonmodifying/adjacent_find.cc:
4979         Likewise.
4980         * testsuite/25_algorithms/pstl/alg_nonmodifying/all_of.cc:
4981         Likewise.
4982         * testsuite/25_algorithms/pstl/alg_nonmodifying/any_of.cc:
4983         Likewise.
4984         * testsuite/25_algorithms/pstl/alg_nonmodifying/count.cc:
4985         Likewise.
4986         * testsuite/25_algorithms/pstl/alg_nonmodifying/equal.cc:
4987         Likewise.
4988         * testsuite/25_algorithms/pstl/alg_nonmodifying/find.cc:
4989         Likewise.
4990         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_end.cc:
4991         Likewise.
4992         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_first_of.cc:
4993         Likewise.
4994         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_if.cc:
4995         Likewise.
4996         * testsuite/25_algorithms/pstl/alg_nonmodifying/for_each.cc:
4997         Likewise.
4998         * testsuite/25_algorithms/pstl/alg_nonmodifying/mismatch.cc:
4999         Likewise.
5000         * testsuite/25_algorithms/pstl/alg_nonmodifying/none_of.cc:
5001         Likewise.
5002         * testsuite/25_algorithms/pstl/alg_nonmodifying/nth_element.cc:
5003         Likewise.
5004         * testsuite/25_algorithms/pstl/alg_nonmodifying/reverse.cc:
5005         Likewise.
5006         * testsuite/25_algorithms/pstl/alg_nonmodifying/reverse_copy.cc:
5007         Likewise.
5008         * testsuite/25_algorithms/pstl/alg_nonmodifying/search_n.cc:
5009         Likewise.
5010         * testsuite/25_algorithms/pstl/alg_sorting/includes.cc:
5011         Likewise.
5012         * testsuite/25_algorithms/pstl/alg_sorting/is_heap.cc: Likewise.
5013         * testsuite/25_algorithms/pstl/alg_sorting/is_sorted.cc:
5014         Likewise.
5015         * testsuite/25_algorithms/pstl/alg_sorting/lexicographical_compare.cc:
5016         Likewise.
5017         * testsuite/25_algorithms/pstl/alg_sorting/minmax_element.cc:
5018         Likewise.
5019         * testsuite/25_algorithms/pstl/alg_sorting/partial_sort.cc:
5020         Likewise.
5021         * testsuite/25_algorithms/pstl/alg_sorting/partial_sort_copy.cc:
5022         Likewise.
5023         * testsuite/25_algorithms/pstl/alg_sorting/set.cc: Likewise.
5024         * testsuite/25_algorithms/pstl/alg_sorting/sort.cc: Likewise.
5025         * testsuite/25_algorithms/pstl/feature_test-2.cc: Likewise.
5026         * testsuite/25_algorithms/pstl/feature_test-3.cc: Likewise.
5027         * testsuite/25_algorithms/pstl/feature_test-4.cc: Likewise.
5028         * testsuite/25_algorithms/pstl/feature_test-5.cc: Likewise.
5029         * testsuite/25_algorithms/pstl/feature_test.cc: Likewise.
5030         * testsuite/26_numerics/pstl/numeric_ops/adjacent_difference.cc:
5031         Likewise.
5032         * testsuite/26_numerics/pstl/numeric_ops/reduce.cc: Likewise.
5033         * testsuite/26_numerics/pstl/numeric_ops/scan.cc: Likewise.
5034         * testsuite/26_numerics/pstl/numeric_ops/transform_reduce.cc:
5035         Likewise.
5036         * testsuite/26_numerics/pstl/numeric_ops/transform_scan.cc:
5037         Likewise.
5038
5039 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
5040
5041         * testsuite/20_util/scoped_allocator/69293_neg.cc: Add dg-error
5042         for additional errors in C++20.
5043         * testsuite/20_util/specialized_algorithms/memory_management_tools/destroy_neg.cc:
5044         Likewise.
5045         * testsuite/20_util/uses_allocator/69293_neg.cc: Likewise.
5046         * testsuite/27_io/filesystem/path/io/dr2989.cc: Likewise.
5047
5048 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
5049
5050         * testsuite/20_util/variant/compile.cc: Rename 'any' to avoid
5051         clash with std::any.
5052
5053 2021-05-07  Jonathan Wakely  <jwakely@redhat.com>
5054
5055         * include/std/istream (__rvalue_stream_extraction_t): Replace
5056         use of __rval_streamable.
5057         * include/std/ostream (__rvalue_stream_insertion_t): Likewise.
5058         (__rval_streamable): Remove.
5059         (_Require_derived_from_ios_base, __derived_from_ios_base): New
5060         helper for checking constraints.
5061         * testsuite/27_io/basic_istream/extractors_other/char/4.cc: Fix
5062         reference to the wrong subclause of the standard.
5063         * testsuite/27_io/basic_istream/extractors_other/wchar_t/4.cc:
5064         Likewise.
5065         * testsuite/27_io/basic_ostream/inserters_other/char/6.cc:
5066         Likewise.
5067         * testsuite/27_io/basic_ostream/inserters_other/wchar_t/6.cc:
5068         Likewise.
5069         * testsuite/27_io/basic_ostream/inserters_other/char/99692.cc:
5070         New test.
5071         * testsuite/27_io/filesystem/path/io/dr2989.cc: Adjust pruned
5072         errors.
5073
5074 2021-05-06  Jonathan Wakely  <jwakely@redhat.com>
5075
5076         * include/bits/stl_algobase.h (__copy_move, __copy_move_backward):
5077         Improve static_assert messages.
5078         * testsuite/25_algorithms/copy/58982.cc: Adjust expected output.
5079         * testsuite/25_algorithms/copy_n/58982.cc: Likewise.
5080
5081 2021-05-06  Patrick Palka  <ppalka@redhat.com>
5082
5083         * include/std/ranges (filter_view::_Iterator::base): Make the
5084         const& overload unconstrained and return a const reference as
5085         per LWG 3533.  Make unconditionally noexcept.
5086         (transform_view::_Iterator::base): Likewise.
5087         (elements_view::_Iterator::base): Likewise.
5088
5089 2021-05-06  Patrick Palka  <ppalka@redhat.com>
5090
5091         * include/bits/stl_iterator.h (move_iterator::base): Make the
5092         const& overload unconstrained and return a const reference as
5093         per LWG 3391.  Make unconditionally noexcept.
5094         (counted_iterator::base): Likewise.
5095         * testsuite/24_iterators/move_iterator/lwg3391.cc: New test.
5096         * testsuite/24_iterators/move_iterator/move_only.cc: Adjust
5097         has_member_base concept to decay-copy the result of base().
5098
5099 2021-05-06  Jonathan Wakely  <jwakely@redhat.com>
5100
5101         * include/std/type_traits (remove_cvref_t): Define in terms of
5102         remove_cvref.
5103         * testsuite/20_util/remove_cvref/value.cc: Check alias.
5104
5105 2021-05-06  Jonathan Wakely  <jwakely@redhat.com>
5106
5107         Revert:
5108         2021-05-05  Jonathan Wakely  <jwakely@redhat.com>
5109
5110         * include/std/charconv (__from_chars_alnum): Pass unsigned
5111         char to std::isdigit.
5112
5113 2021-05-05  Patrick Palka  <ppalka@redhat.com>
5114
5115         * include/bits/ranges_util.h (enable_borrowed_range<subrange>):
5116         Remove constraints on this partial specialization.
5117         * include/std/ranges (enable_borrowed_range<iota_view>):
5118         Likewise.
5119
5120 2021-05-05  Patrick Palka  <ppalka@redhat.com>
5121
5122         * include/std/ranges (transform_view::_Iterator::iter_swap):
5123         Remove as per LWG 3520.
5124         (join_view::_Iterator::iter_swap): Add indirectly_swappable
5125         constraint as per LWG 3517.
5126
5127 2021-05-05  Jonathan Wakely  <jwakely@redhat.com>
5128
5129         * testsuite/20_util/function_objects/invoke/3.cc: Check feature
5130         test macro.
5131         * testsuite/20_util/function_objects/invoke/version.cc: New test.
5132
5133 2021-05-05  Jonathan Wakely  <jwakely@redhat.com>
5134
5135         * include/std/charconv (__from_chars_alnum): Pass unsigned
5136         char to std::isdigit.
5137
5138 2021-05-05  Corentin Gay  <gay@adacore.com>
5139
5140         * acinclude.m4: Add VxWorks-specific case for the
5141         configuration of ctypes.
5142         * configure: Regenerate.
5143         * config/locale/vxworks/ctype_members.cc: Add VxWorks-specific
5144         version.
5145         * config/os/vxworks/ctype_base.h: Adjust for VxWorks7+.
5146         * config/os/vxworks/ctype_configure_char.cc: Likewise.
5147         * config/os/vxworks/ctype_inline.h: Likewise.
5148         * testsuite/28_regex/traits/char/isctype.cc: Defines
5149         NEWLINE_IN_CLASS_BLANK if the target is VxWorks.
5150         * testsuite/28_regex/traits/wchar_t/isctype.cc: Likewise.
5151
5152 2021-05-04  Jonathan Wakely  <jwakely@redhat.com>
5153
5154         * include/std/future (promise::set_value): Check for existence
5155         of shared state before dereferncing it.
5156         (promise::set_exception, promise::set_value_at_thread_exit)
5157         (promise::set_exception_at_thread_exit): Likewise.
5158         (promise<R&>::set_value, promise<R&>::set_exception)
5159         (promise<R&>::set_value_at_thread_exit)
5160         (promise<R&>::set_exception_at_thread_exit): Likewise.
5161         (promise<void>::set_value, promise<void>::set_exception)
5162         (promise<void>::set_value_at_thread_exit)
5163         (promise<void>::set_exception_at_thread_exit): Likewise.
5164         * testsuite/30_threads/promise/members/at_thread_exit2.cc:
5165         Remove unused variable.
5166
5167 2021-05-04  Jonathan Wakely  <jwakely@redhat.com>
5168
5169         * include/bits/basic_string.h (basic_string(const CharT*, const A&)):
5170         Do not do arithmetic on null pointer.
5171
5172 2021-05-04  Jonathan Wakely  <jwakely@redhat.com>
5173
5174         * include/ext/pb_ds/detail/cc_hash_table_map_/cc_ht_map_.hpp
5175         (find_key_pointer(key_const_reference, false_type))
5176         (find_key_pointer(key_const_reference, true_type)): Do not
5177         dereference null pointer.
5178
5179 2021-05-04  Jonathan Wakely  <jwakely@redhat.com>
5180
5181         * testsuite/20_util/from_chars/3.cc: Use unsigned type to avoid
5182         overflow.
5183         * testsuite/24_iterators/reverse_iterator/2.cc: Do not add
5184         non-zero value to null pointer.
5185         * testsuite/25_algorithms/copy_backward/move_iterators/69478.cc:
5186         Use past-the-end iterator for result.
5187         * testsuite/25_algorithms/move_backward/69478.cc: Likewise.
5188         * testsuite/25_algorithms/move_backward/93872.cc: Likewise.
5189
5190 2021-05-04  Jonathan Wakely  <jwakely@redhat.com>
5191
5192         PR libstdc++/100384
5193         * include/std/variant (__get_t): New alias template yielding the
5194         return type of std::get<N> on a variant.
5195         (__visit_result_t): New alias template yielding the result of
5196         std::visit.
5197         (__same_types): Move into namespace __detail::__variant.
5198         (__check_visitor_results): Likewise. Use __invoke_result_t and
5199         __get_t.
5200         (__check_visitor_result): Remove.
5201         (visit): Use __visit_result_t for return type.
5202         * testsuite/20_util/variant/100384.cc: New test.
5203
5204 2021-05-04  Jonathan Wakely  <jwakely@redhat.com>
5205
5206         * acinclude.m4 (GLIBCXX_ENABLE_INT128_FLOAT128): Remove
5207         checks for __int128 and rename to GLIBCXX_ENABLE_FLOAT128.
5208         * config.h.in: Regenerate.
5209         * configure: Regenerate.
5210         * configure.ac: Adjust to use GLIBCXX_ENABLE_FLOAT128.
5211         * include/bits/random.h (_Select_uint_least_t<s, 1>):
5212         Use __SIZEOF_INT128__ to decide whether to use __int128.
5213         * include/std/charconv (__to_chars_unsigned_type): Likewise.
5214
5215 2021-05-03  Gerald Pfeifer  <gerald@pfeifer.com>
5216
5217         * doc/xml/manual/ctype.xml: Move unix.org reference to https.
5218         * doc/html/manual/facets.html: Regenerate.
5219
5220 2021-04-30  Patrick Palka  <ppalka@redhat.com>
5221
5222         * include/std/ranges (__detail::__non_propating_cache): Define
5223         as per P2328.
5224         (join_view): Remove constraints on the value and reference types
5225         of the wrapped iterator type as per P2328.
5226         (join_view::_Iterator::_M_satisfy): Adjust as per P2328.
5227         (join_view::_Iterator::operator++): Likewise.
5228         (join_view::_M_inner): Use __non_propating_cache as per P2328.
5229         Remove now-redundant use of __maybe_present_t.
5230         * testsuite/std/ranges/adaptors/join.cc: Include <array>.
5231         (test10): New test.
5232
5233 2021-04-30  Jonathan Wakely  <jwakely@redhat.com>
5234
5235         * include/bits/basic_string.h (__cpp_lib_constexpr_string):
5236         Only define for C++17 and later.
5237         * include/std/version (__cpp_lib_semaphore): Fix condition
5238         to match the one in <semaphore>.
5239
5240 2021-04-30  Jonathan Wakely  <jwakely@redhat.com>
5241
5242         * acinclude.m4 (GLIBCXX_CHECK_INT64_T): Delete.
5243         * config.h.in: Regenerate.
5244         * configure: Regenerate.
5245         * configure.ac: Do not use GLIBCXX_CHECK_INT64_T.
5246         * include/bits/postypes.h: Remove include of <stdint.h> and
5247         definition/undefinition of the __STDC_LIMIT_MACROS and
5248         __STDC_CONSTANT_MACROS macros.
5249         (streamoff): Use __INT64_TYPE__ if defined.
5250
5251 2021-04-30  Patrick Palka  <ppalka@redhat.com>
5252
5253         * include/std/ranges (split_view::_InnerIter::operator++):
5254         Depend on _Base instead of _Vp directly, as per LWG 3532.
5255
5256 2021-04-30  Patrick Palka  <ppalka@redhat.com>
5257
5258         * include/bits/ranges_util.h (subrange::subrange): Avoid
5259         list-initialization in delegating constructor.
5260         * include/std/ranges (single_view): Replace implicit guide
5261         with explicit deduction guide that decays its argument.
5262         (_Single::operator()): Avoid CTAD when constructing the
5263         single_view object.
5264         (_Iota::operator()): Avoid list-initialization.
5265         (__detail::__can_filter_view, _Filter::operator()): Likewise.
5266         (__detail::__can_transform_view, _Transform::operator()): Likewise.
5267         (take_view::begin): Likewise.
5268         (__detail::__can_take_view, _Take::operator()): Likewise.
5269         (__detail::__can_take_while_view, _TakeWhile::operator()): Likewise.
5270         (__detail::__can_drop_view, _Drop::operator()): Likewise.
5271         (__detail::__can_drop_while_view, _DropWhile::operator()): Likewise.
5272         (split_view::split_view): Use views::single when initializing
5273         _M_pattern.
5274         (__detail::__can_split_view, _Split::operator()): Avoid
5275         list-initialization.
5276         (_Counted::operator()): Likewise.
5277         * testsuite/std/ranges/p2367.cc: New test.
5278
5279 2021-04-30  Jonathan Wakely  <jwakely@redhat.com>
5280
5281         PR libstdc++/60497
5282         * include/bits/basic_ios.tcc (basic_ios::copyfmt): use
5283         std::addressof.
5284         * include/bits/basic_string.tcc (basic_string::swap)
5285         (basic_string::assign): Likewise.
5286         * include/bits/deque.tcc (deque::operator=(const deque&)):
5287         Likewise.
5288         * include/bits/stl_tree.h (_Rb_tree::operator=(const * _Rb_tree&)):
5289         Likewise.
5290         * include/bits/vector.tcc (vector::operator=(const vector&)):
5291         Likewise.
5292
5293 2021-04-30  Jonathan Wakely  <jwakely@redhat.com>
5294
5295         * include/std/istream (operator>>(Istream&&, x&)): Simplify, as
5296         per LWG 1203.
5297         * include/std/ostream (operator<<(Ostream&&, const x&)):
5298         Likewise.
5299         * testsuite/27_io/basic_istream/extractors_character/char/lwg2499_neg.cc:
5300         Adjust dg-error pattern.
5301         * testsuite/27_io/basic_istream/extractors_character/wchar_t/lwg2499_neg.cc:
5302         Likewise.
5303         * testsuite/27_io/basic_istream/extractors_other/char/4.cc: Define
5304         is_extractable trait to replace std::__is_extractable. Make it
5305         work with rvalue streams as well as lvalues, to replace f() and
5306         g() helper functions.
5307         * testsuite/27_io/basic_istream/extractors_other/wchar_t/4.cc:
5308         Likewise.
5309         * testsuite/27_io/basic_ostream/inserters_other/char/6.cc:
5310         Define is_insertable trait to replace std::__is_insertable. Make
5311         it work with rvalue streams as well as lvalues, to replace f()
5312         and g() helper functions.
5313         * testsuite/27_io/basic_ostream/inserters_other/wchar_t/6.cc:
5314         Likewise.
5315         * testsuite/27_io/filesystem/path/io/dr2989.cc: Prune additional
5316         errors from new constraints.
5317         * testsuite/27_io/rvalue_streams-2.cc: Remove PR 80675 checks,
5318         which are no longer expected to compile.
5319         * testsuite/27_io/rvalue_streams.cc: Adjust existing test.
5320         Verify LWG 1203 changes.
5321
5322 2021-04-30  Jonathan Wakely  <jwakely@redhat.com>
5323
5324         PR libstdc++/100285
5325         * include/experimental/socket (__basic_socket_impl::set_option)
5326         (__basic_socket_impl::get_option) [!_GLIBCXX_HAVE_SYS_SOCKET_H]:
5327         Just set error code.
5328         * testsuite/experimental/net/socket/socket_base.cc: CHeck
5329         for <sys/socket.h> not <socket.h>.
5330
5331 2021-04-30  Jonathan Wakely  <jwakely@redhat.com>
5332
5333         PR libstdc++/100180
5334         PR libstdc++/100286
5335         PR libstdc++/100351
5336         * testsuite/experimental/net/internet/address/v4/comparisons.cc:
5337         Use new effective-target keyword.
5338         * testsuite/experimental/net/internet/address/v4/cons.cc:
5339         Likewise.
5340         * testsuite/experimental/net/internet/address/v4/creation.cc:
5341         Likewise.
5342         * testsuite/experimental/net/internet/address/v4/members.cc:
5343         Likewise.
5344         * testsuite/experimental/net/internet/address/v6/members.cc:
5345         Likewise.
5346         * testsuite/experimental/net/internet/resolver/base.cc:
5347         Likewise.
5348         * testsuite/experimental/net/internet/resolver/ops/lookup.cc:
5349         Likewise.
5350         * testsuite/experimental/net/internet/resolver/ops/reverse.cc:
5351         Likewise.
5352         * testsuite/experimental/net/internet/socket/opt.cc:
5353         Likewise.
5354         * testsuite/experimental/net/internet/tcp.cc:
5355         Likewise.
5356         * testsuite/experimental/net/internet/udp.cc:
5357         Likewise.
5358         * testsuite/lib/libstdc++.exp (check_effective_target_net_ts_ip):
5359         New proc to check net_ts_ip et.
5360
5361 2021-04-28  Jonathan Wakely  <jwakely@redhat.com>
5362
5363         PR libstdc++/97930
5364         * testsuite/20_util/pair/requirements/structural.cc: New test.
5365
5366 2021-04-28  Jonathan Wakely  <jwakely@redhat.com>
5367
5368         * include/bits/stl_pair.h (pair) [__cplusplus > 202002]: Add
5369         new definitions for constructors and assignment operators using
5370         concepts for constraints.
5371         * testsuite/20_util/pair/cons/99957.cc: Disable for C++20 and
5372         later.
5373         * testsuite/20_util/pair/cons/explicit_construct.cc: Adjust
5374         expected error messages to also match C++20 errors.
5375
5376 2021-04-28  Jonathan Wakely  <jwakely@redhat.com>
5377
5378         PR libstdc++/99957
5379         * include/bits/stl_pair.h (_PCC::_MoveCopyPair, _PCC::_CopyMovePair):
5380         Combine and replace with ...
5381         (_PCC::_DeprConsPair): New SFINAE helper function.
5382         (pair): Merge preprocessor blocks so that all C++03 members
5383         are defined together at the end.
5384         (pair::pair(const _T1&, _U2&&), pair::pair(_U1&&, const _T2&)):
5385         Replace _T1 and _T2 parameters with __null_ptr_constant and
5386         adjust constraints.
5387         * testsuite/20_util/pair/40925.cc: Use nullptr instead of 0.
5388         * testsuite/20_util/pair/cons/explicit_construct.cc: Likewise.
5389         * testsuite/20_util/pair/cons/99957.cc: New test.
5390
5391 2021-04-28  Jonathan Wakely  <jwakely@redhat.com>
5392
5393         * include/bits/basic_string.h (__cpp_lib_constexpr_string): Define.
5394         * include/std/version (__cpp_lib_constexpr_string): Define.
5395         * testsuite/21_strings/char_traits/requirements/constexpr_functions_c++17.cc:
5396         Check for __cpp_lib_constexpr_string.
5397         * testsuite/21_strings/char_traits/requirements/constexpr_functions_c++20.cc:
5398         Likewise.
5399         * testsuite/21_strings/char_traits/requirements/version.cc: New test.
5400
5401 2021-04-28  Jonathan Wakely  <jwakely@redhat.com>
5402
5403         * doc/Makefile.am (stamp-pdf-doxygen): Improve comment about
5404         dealing with errors. Use '@' to prevent shell command being
5405         echoed.
5406         * doc/Makefile.in: Regenerate.
5407
5408 2021-04-28  Jonathan Wakely  <jwakely@redhat.com>
5409
5410         PR libstdc++/100298
5411         * include/bits/std_thread.h (thread::hardware_concurrency): Add
5412         missing noexcept to inline definition for non-gthreads targets.
5413
5414 2021-04-28  Patrick Palka  <ppalka@redhat.com>
5415
5416         PR libstdc++/100187
5417         PR libstdc++/100237
5418         PR libstdc++/100249
5419         PR libstdc++/100287
5420         * include/bits/ranges_algo.h (__search_n_fn::operator()): Give
5421         the __value_comp lambda an explicit bool return type.
5422         (__is_permutation_fn::operator()): Give the __proj_scan local
5423         variable auto&& return type.  Give the __comp_scan lambda an
5424         explicit bool return type.
5425         (__remove_fn::operator()): Give the __pred lambda an explicit
5426         bool return type.
5427         (__partition_fn::operator()): Don't std::move __first twice
5428         when returning an empty subrange.
5429         (__min_fn::operator()): Don't std::move __comp.
5430         (__max_fn::operator()): Likewise.
5431         (__minmax_fn::operator()): Likewise.
5432
5433 2021-04-27  Patrick Palka  <ppalka@redhat.com>
5434
5435         PR libstdc++/100290
5436         * include/std/ranges (join_view::_Iterator::operator++): Correct
5437         the return type of the lambda to avoid returning a copy of
5438         _M_parent->_M_inner.
5439         * testsuite/std/ranges/adaptors/join.cc (test10): New test.
5440
5441 2021-04-27  Jakub Jelinek  <jakub@redhat.com>
5442
5443         Revert:
5444         2021-04-22  Jakub Jelinek  <jakub@redhat.com>
5445
5446         PR target/100182
5447         * testsuite/29_atomics/atomic_float/1.cc: Add dg-xfail-run-if for
5448         ia32.
5449         * testsuite/29_atomics/atomic_float/wait_notify.cc: Add dg-skip-if for
5450         ia32.
5451
5452 2021-04-27  Jonathan Wakely  <jwakely@redhat.com>
5453
5454         * include/experimental/internet (address_v6::bytes_type): Adjust
5455         formatting.
5456         (basic_endpoint): Define _M_is_v6() to put all checks for
5457         AF_INET6 in one place.
5458         (basic_endpoint::resize): Simplify.
5459         (operator==(const tcp&, const tcp&)): Add constexpr and noexcept.
5460         (operator!=(const tcp&, const tcp&)): Likewise.
5461         (operator==(const udp&, const udp&)): Likewise.
5462         (operator!=(const udp&, const udp&)): Likewise.
5463         * testsuite/experimental/net/internet/tcp.cc: New test.
5464         * testsuite/experimental/net/internet/udp.cc: New test.
5465
5466 2021-04-27  Jonathan Wakely  <jwakely@redhat.com>
5467
5468         PR libstdc++/100286
5469         * include/experimental/internet (resolver_errc, resolver_category())
5470         (make_error_code, make_error_condition): Define unconditionally,
5471         only make enumerators and use of gai_strerror depend on the
5472         availability of <netdb.h>.
5473         (address_v4::to_string): Use correct constant for string length.
5474         (address_v4::to_string, address_v6::to_string): Define
5475         unconditionally, throw if unsupported.
5476         (make_address_v4, make_address_v6): Define unconditionally.
5477         Return an error if unsupported.
5478         (tcp, udp, v6_only, unicast::hops, multicast::*): Define
5479         conditionally,
5480         * testsuite/experimental/net/internet/socket/opt.cc: Check for
5481         <netinet/in.h> and <netinet/tcp.h> before using types from
5482         namespace net::ip.
5483
5484 2021-04-27  Jonathan Wakely  <jwakely@redhat.com>
5485
5486         PR libstdc++/100285
5487         * include/experimental/internet (resolver_base::flags):
5488         Define overloaded operators as hidden friends.
5489         * include/experimental/socket (socket_base::message_flags):
5490         Likewise.
5491
5492 2021-04-26  Jonathan Wakely  <jwakely@redhat.com>
5493
5494         * include/experimental/internet (tcp::no_delay, v6_only)
5495         (unicast::hops, multicast::hops, multicast::enable_loopback):
5496         Change access of base class and static data members. Add
5497         using-declaration for __socket_crtp::operator=(_Tp).
5498         (multicast::__mcastopt): New type.
5499         (multicast::join_group, multicast::leave_group): Derive from
5500         __mcastopt for common implementation.
5501         * include/experimental/socket: Add comment.
5502         * testsuite/experimental/net/internet/socket/opt.cc: New test.
5503         * testsuite/experimental/net/socket/socket_base.cc: Check for
5504         protected constructor/destructor of socket_base. Check for
5505         explicit constructors of socket option classes.
5506
5507 2021-04-26  Jonathan Wakely  <jwakely@redhat.com>
5508
5509         * include/experimental/bits/net.h (__socket_base): Add
5510         bool template parameter to allow BooleanSocketOption and
5511         IntegerSocketOption to have different __socket_base<int>
5512         base classes.
5513         (__socket_base<bool>): Adjust base class.
5514         (__socket_base<int>): Add partial specialization.
5515         (__socket_crtp::operator=(_Tp)): Add noexcept-specifier.
5516         * include/experimental/socket (socket_base::broadcast)
5517         (socket_base::debug, socket_base::do_not_route)
5518         (socket_base::keep_alive, socket_base::linger)
5519         (socket_base::out_of_band_inline)
5520         (socket_base::receive_buffer_size)
5521         (socket_base::receive_low_watermark)
5522         (socket_base::reuse_address, socket_base::send_buffer_size)
5523         (socket_base::send_low_watermark): Add using-declaration for
5524         __socket_crtp::operator=(_Tp).
5525         * testsuite/experimental/net/socket/socket_base.cc: Check
5526         properties of socket option types.
5527
5528 2021-04-26  Jonathan Wakely  <jwakely@redhat.com>
5529
5530         * include/experimental/internet (resolver_base::flags): Remove
5531         enumerators. Initialize constants directly with desired values.
5532         Make all operators constexpr and noexcept.
5533         * testsuite/experimental/net/internet/resolver/base.cc: Use
5534         __gnu_test::test_bitmask_values for bitmask type. Check
5535         construction and destruction is protected.
5536
5537 2021-04-26  Jonathan Wakely  <jwakely@redhat.com>
5538
5539         * include/bits/semaphore_base.h: Include <exception> and <errno.h>.
5540
5541 2021-04-26  Jonathan Wakely  <jwakely@redhat.com>
5542
5543         PR libstdc++/100259
5544         * include/experimental/internet (net::ip::make_error_code)
5545         (net::ip::make_error_condition, net::ip::make_network_v4)
5546         (net::ip::operator==(const udp&, const udp&)): Add 'inline'.
5547
5548 2021-04-24  David Edelsohn  <dje.gcc@gmail.com>
5549
5550         * testsuite/lib/dg-options.exp (atomic_link_flags): New.
5551         (add_options_for_libatomic): Use atomic_link_flags.
5552
5553 2021-04-23  Jonathan Wakely  <jwakely@redhat.com>
5554
5555         PR libstdc++/100180
5556         * include/experimental/io_context (io_context): Define
5557         dummy_pollfd type so that most member functions still compile
5558         without <poll.h> and struct pollfd.
5559
5560 2021-04-23  Jonathan Wakely  <jwakely@redhat.com>
5561
5562         * include/experimental/io_context (io_context::async_wait): Add
5563         comment.
5564         * include/experimental/socket (basic_socket::async_connect):
5565         Cast wait_type constant to int.
5566         (basic_datagram_socket::async_receive): Likewise.
5567         (basic_datagram_socket::async_receive_from): Likewise.
5568         (basic_datagram_socket::async_send): Likewise.
5569         (basic_datagram_socket::async_send_to): Likewise.
5570         (basic_stream_socket::async_receive): Likewise.
5571         (basic_stream_socket::async_send): Likewise. Use io_context
5572         parameter directly, instead of via an executor.
5573         (basic_socket_acceptor::async_accept): Likewise.
5574
5575 2021-04-23  Jonathan Wakely  <jwakely@redhat.com>
5576
5577         * include/experimental/socket (socket_base::shutdown_type):
5578         (socket_base::wait_type, socket_base::message_flags):
5579         Remove enumerators. Initialize constants directly with desired
5580         values.
5581         (socket_base::message_flags): Make all operators constexpr and
5582         noexcept.
5583         * testsuite/util/testsuite_common_types.h (test_bitmask_values):
5584         New test utility.
5585         * testsuite/experimental/net/socket/socket_base.cc: New test.
5586
5587 2021-04-22  David Edelsohn  <dje.gcc@gmail.com>
5588
5589         * config/os/aix/atomicity.h: Delete.
5590
5591 2021-04-22  Jonathan Wakely  <jwakely@redhat.com>
5592
5593         * include/bits/atomic_timed_wait.h (__cond_wait_until_impl):
5594         Handle system_clock as well as steady_clock.
5595         * testsuite/30_threads/semaphore/try_acquire_for.cc: Re-enable.
5596         * testsuite/30_threads/semaphore/try_acquire_until.cc:
5597         Re-enable.
5598
5599 2021-04-22  Jonathan Wakely  <jwakely@redhat.com>
5600
5601         * testsuite/30_threads/semaphore/try_acquire_posix.cc: Add
5602         options for libatomic.
5603
5604 2021-04-22  Jonathan Wakely  <jwakely@redhat.com>
5605
5606         * config/os/gnu-linux/os_defines.h: Fix type in comment.
5607
5608 2021-04-22  Jonathan Wakely  <jwakely@redhat.com>
5609
5610         PR libstdc++/99006
5611         * include/bits/shared_ptr.h (allocate_shared): Assert that _Tp
5612         is not an array type.
5613         * include/bits/shared_ptr_base.h (__allocate_shared): Likewise.
5614         * testsuite/20_util/shared_ptr/creation/99006.cc: New test.
5615
5616 2021-04-22  Thomas Rodgers  <rodgert@twrodgers.com>
5617
5618         * include/bits/atomic_wait.h: Always notify waiters in the
5619         case of 'bare' address notification.
5620
5621 2021-04-22  Jakub Jelinek  <jakub@redhat.com>
5622
5623         PR target/100182
5624         * testsuite/29_atomics/atomic_float/1.cc: Add dg-xfail-run-if for
5625         ia32.
5626         * testsuite/29_atomics/atomic_float/wait_notify.cc: Add dg-skip-if for
5627         ia32.
5628
5629 2021-04-22  Jonathan Wakely  <jwakely@redhat.com>
5630
5631         PR libstdc++/100179
5632         * include/bits/semaphore_base.h: Remove #error.
5633         * include/std/semaphore: Do not define anything unless one of
5634         the implementations is available.
5635
5636 2021-04-21  Thomas Rodgers  <rodgert@twrodgers.com>
5637
5638         * include/bits/semaphore_base.h: Always reload __old in
5639         __atomic_semaphore::_S_do_try_acquire().
5640         * testsuite/30_threads/stop_token/stop_callback/destroy.cc:
5641         re-enable testcase.
5642
5643 2021-04-21  Philippe Blain  <levraiphilippeblain@gmail.com>
5644             Jonathan Wakely  <jwakely@redhat.com>
5645
5646         PR libstdc++/99453
5647         * python/Makefile.am: Install libstdc++*-gdb.py more robustly.
5648         * python/Makefile.in: Regenerate.
5649
5650 2021-04-21  Thomas Rodgers  <rodgert@twrodgers.com>
5651
5652         * include/bits/semaphore_base.h: Add missing _M_try_acquire()
5653         member to __platform_wait.
5654
5655 2021-04-21  Jonathan Wakely  <jwakely@redhat.com>
5656
5657         * include/std/latch: Replace tab characters in license text.
5658         * include/std/semaphore: Likewise.
5659
5660 2021-04-21  Jakub Jelinek  <jakub@redhat.com>
5661
5662         PR libstdc++/100164
5663         * acinclude.m4: For POSIX semaphores AC_DEFINE HAVE_POSIX_SEMAPHORE
5664         rather than _GLIBCXX_HAVE_POSIX_SEMAPHORE.
5665         * configure: Regenerated.
5666         * config.h.in: Regenerated.
5667
5668 2021-04-20  Jonathan Wakely  <jwakely@redhat.com>
5669
5670         * testsuite/30_threads/semaphore/try_acquire_for.cc: Disable
5671         test for targets not using futexes for semaphores.
5672         * testsuite/30_threads/semaphore/try_acquire_until.cc: Likewise.
5673         * testsuite/30_threads/stop_token/stop_callback/destroy.cc:
5674         Disable for all targets.
5675
5676 2021-04-20  Thomas Rodgers  <trodgers@redhat.com>
5677
5678         * include/Makefile.am: Add new <bits/this_thread_sleep.h> header.
5679         * include/Makefile.in: Regenerate.
5680         * include/bits/this_thread_sleep.h: New file.
5681         * include/bits/atomic_base.h: Adjust all calls
5682         to __atomic_wait/__atomic_notify for new call signatures.
5683         * include/bits/atomic_timed_wait.h: Extensive rewrite.
5684         * include/bits/atomic_wait.h: Likewise.
5685         * include/bits/semaphore_base.h: Adjust all calls
5686         to __atomic_wait/__atomic_notify for new call signatures.
5687         * include/std/atomic: Likewise.
5688         * include/std/barrier: Likewise.
5689         * include/std/latch: Likewise.
5690         * include/std/semaphore: Likewise.
5691         * include/std/thread (this_thread::sleep_for)
5692         (this_thread::sleep_until): Move to new header.
5693         * testsuite/29_atomics/atomic/wait_notify/bool.cc: Simplify
5694         test.
5695         * testsuite/29_atomics/atomic/wait_notify/generic.cc: Likewise.
5696         * testsuite/29_atomics/atomic/wait_notify/pointers.cc: Likewise.
5697         * testsuite/29_atomics/atomic_flag/wait_notify/1.cc: Likewise.
5698         * testsuite/29_atomics/atomic_float/wait_notify.cc: Likewise.
5699         * testsuite/29_atomics/atomic_integral/wait_notify.cc: Likewise.
5700         * testsuite/29_atomics/atomic_ref/wait_notify.cc: Likewise.
5701
5702 2021-04-20  Patrick Palka  <ppalka@redhat.com>
5703
5704         PR libstdc++/95983
5705         * include/bits/stl_iterator.h (__detail::__move_iter_cat):
5706         Define.
5707         (move_iterator): Derive from the above in C++20 in order to
5708         conditionally define iterator_category as per P2259.
5709         (move_iterator::__base_cat): No longer used, so remove.
5710         (move_iterator::iterator_category): Remove in C++20.
5711         (__detail::__common_iter_use_postfix_proxy): Define.
5712         (common_iterator::_Proxy): Rename to ...
5713         (common_iterator:__arrow_proxy): ... this.
5714         (common_iterator::__postfix_proxy): Define as per P2259.
5715         (common_iterator::operator->): Adjust.
5716         (common_iterator::operator++): Adjust as per P2259.
5717         (iterator_traits<common_iterator>::_S_iter_cat): Define.
5718         (iterator_traits<common_iterator>::iterator_category): Change as
5719         per P2259.
5720         (__detail::__counted_iter_value_type): Define.
5721         (__detail::__counted_iter_concept): Define.
5722         (__detail::__counted_iter_cat): Define.
5723         (counted_iterator): Derive from the above three classes in order
5724         to conditionally define value_type, iterator_concept and
5725         iterator category respectively as per P2259.
5726         (counted_iterator::operator->): Define as per P2259.
5727         (incrementable_traits<counted_iterator>): Remove as per P2259.
5728         (iterator_traits<counted_iterator>): Adjust as per P2259.
5729         * include/std/ranges (__detail::__iota_view_iter_cat): Define.
5730         (iota_view::_Iterator): Derive from the above in order to
5731         conditionally define iterator_category as per P2259.
5732         (iota_view::_S_iter_cat): Rename to ...
5733         (iota_view::_S_iter_concept): ... this.
5734         (iota_view::iterator_concept): Use it to apply LWG 3291 changes.
5735         (iota_view::iterator_category): Remove.
5736         (__detail::__filter_view_iter_cat): Define.
5737         (filter_view::_Iterator): Derive from the above in order to
5738         conditionally define iterator_category as per P2259.
5739         (filter_view::_Iterator): Move to struct __filter_view_iter_cat.
5740         (filter_view::_Iterator::iterator_category): Remove.
5741         (transform_view::_Base): Define.
5742         (transform_view::__iter_cat): Define.
5743         (transform_view::_Iterator): Derive from the above in order to
5744         conditionally define iterator_category as per P2259.
5745         (transform_view::_Iterator::_Base): Just alias
5746         transform_view::_Base.
5747         (transform_view::_Iterator::_S_iter_cat): Move to struct
5748         transform_view::__iter_cat.
5749         (transform_view::_Iterator::iterator_category): Remove.
5750         (transform_view::_Sentinel::_Base): Just alias
5751         transform_view::_Base.
5752         (join_view::_Base): Define.
5753         (join_view::_Outer_iter): Define.
5754         (join_view::_Inner_iter): Define.
5755         (join_view::_S_ref_is_glvalue): Define.
5756         (join_view::__iter_cat): Define.
5757         (join_view::_Iterator): Derive from it in order to conditionally
5758         define iterator_category as per P2259.
5759         (join_view::_Iterator::_Base): Just alias join_view::_Base.
5760         (join_view::_Iterator::_S_ref_is_glvalue): Just alias
5761         join_view::_S_ref_is_glvalue.
5762         (join_view::_Iterator::_S_iter_cat): Move to struct
5763         transform_view::__iter_cat.
5764         (join_view::_Iterator::_Outer_iter): Just alias
5765         join_view::_Outer_iter.
5766         (join_view::_Iterator::_Inner_iter): Just alias
5767         join_view::_Inner_iter.
5768         (join_view::_Iterator::iterator_category): Remove.
5769         (join_view::_Sentinel::_Base): Just alias join_view::_Base.
5770         (__detail::__split_view_outer_iter_cat): Define.
5771         (__detail::__split_view_inner_iter_cat): Define.
5772         (split_view::_Base): Define.
5773         (split_view::_Outer_iter): Derive from __split_view_outer_iter_cat
5774         in order to conditionally define iterator_category as per P2259.
5775         (split_view::_Outer_iter::iterator_category): Remove.
5776         (split_view::_Inner_iter): Derive from __split_view_inner_iter_cat
5777         in order to conditionally define iterator_category as per P2259.
5778         (split_view::_Inner_iter::_S_iter_cat): Move to
5779         __split_view_inner_iter_cat.
5780         (split_view::_Inner_iter::iterator_category): Remove.
5781         (elements_view::_Base): Define.
5782         (elements_view::__iter_cat): Define.
5783         (elements_view::_Iterator): Derive from the above in order to
5784         conditionall define iterator_category as per P2259.
5785         (elements_view::_Iterator::_Base): Just alias
5786         elements_view::_Base.
5787         (elements_view::_Iterator::_S_iter_concept)
5788         (elements_view::_Iterator::iterator_concept): Define as per
5789         P2259.
5790         (elements_view::_Iterator::iterator_category): Remove.
5791         (elements_view::_Sentinel::_Base): Just alias
5792         elements_view::_Base.
5793         * testsuite/24_iterators/headers/iterator/synopsis_c++20.cc:
5794         Adjust constraints on iterator_traits<counted_iterator>.
5795         * testsuite/std/ranges/p2259.cc: New test.
5796
5797 2021-04-20  Jonathan Wakely  <jwakely@redhat.com>
5798
5799         PR libstdc++/100146
5800         * include/std/charconv (__cpp_lib_to_chars): Define
5801         conditionally.
5802         * include/std/version (__cpp_lib_to_chars): Likewise..
5803         * testsuite/20_util/from_chars/4.cc: Only check feature test
5804         macro, not _GLIBCXX_HAVE_USELOCALE.
5805         * testsuite/20_util/from_chars/5.cc: Likewise.
5806         * testsuite/20_util/from_chars/6.cc: Likewise.
5807         * testsuite/20_util/to_chars/long_double.cc: Likewise.
5808
5809 2021-04-20  Jakub Jelinek  <jakub@redhat.com>
5810
5811         * testsuite/util/testsuite_abi.cc (compare_symbols): If any symbol
5812         versions with _IEEE128_ substring are found, set ieee_version_found
5813         to true.  Ignore missing symbols with _IEEE128_ in version name if
5814         !ieee_version_found.  Use i->first as version_name instead of
5815         i->second.version_name if the latter is empty.
5816         * config/abi/post/powerpc64-linux-gnu/baseline_symbols.txt: Update.
5817
5818 2021-04-19  H.J. Lu  <hjl.tools@gmail.com>
5819
5820         * config/abi/post/x86_64-linux-gnu/x32/baseline_symbols.txt:
5821         Updated.
5822
5823 2021-04-17  Jakub Jelinek  <jakub@redhat.com>
5824
5825         * config/abi/post/powerpc-linux-gnu/baseline_symbols.txt: Update.
5826         * config/abi/post/powerpc64-linux-gnu/32/baseline_symbols.txt: Update.
5827
5828 2021-04-17  Jakub Jelinek  <jakub@redhat.com>
5829
5830         * config/abi/post/x86_64-linux-gnu/baseline_symbols.txt: Update.
5831         * config/abi/post/x86_64-linux-gnu/32/baseline_symbols.txt: Update.
5832         * config/abi/post/i386-linux-gnu/baseline_symbols.txt: Update.
5833         * config/abi/post/i486-linux-gnu/baseline_symbols.txt: Update.
5834         * config/abi/post/s390x-linux-gnu/baseline_symbols.txt: Update.
5835         * config/abi/post/powerpc64-linux-gnu/baseline_symbols.txt: Update.
5836
5837 2021-04-15  Jonathan Wakely  <jwakely@redhat.com>
5838
5839         * testsuite/lib/dg-options.exp (add_options_for_libatomic): Also
5840         add libatomic options for 32-bit sparc*-*-linux-gnu.
5841
5842 2021-04-15  Jonathan Wakely  <jwakely@redhat.com>
5843
5844         PR libstdc++/96657
5845         * libsupc++/Makefile.am: Add atomicity.cc here.
5846         * src/c++98/Makefile.am: Remove it from here.
5847         * libsupc++/Makefile.in: Regenerate.
5848         * src/c++98/Makefile.in: Regenerate.
5849         * testsuite/18_support/exception_ptr/96657.cc: New test.
5850
5851 2021-04-13  Jonathan Wakely  <jwakely@redhat.com>
5852
5853         PR libstdc++/100060
5854         * include/std/bit: Only include <ext/numeric_traits.h> for
5855         hosted build, use <limits> otherwise.
5856
5857 2021-04-13  Jonathan Wakely  <jwakely@redhat.com>
5858
5859         * doc/xml/manual/backwards_compatibility.xml: Remove porting
5860         notes for libg++ and libstdc++-v2, and bibliography.
5861         * doc/html/*: Regenerated.
5862
5863 2021-04-12  Jonathan Wakely  <jwakely@redhat.com>
5864
5865         PR libstdc++/100044
5866         * include/bits/ranges_util.h (__detail::__iterator_sentinel_pair):
5867         Remove helper concept.
5868         (subrange(_Pr), subrange(Pr, __make_unsigned_like<...>)): Remove
5869         deduction guides, as per LWG 3404.
5870         * testsuite/std/ranges/subrange/lwg3282_neg.cc: Check that class
5871         template argument deduction fails.
5872
5873 2021-04-12  Jonathan Wakely  <jwakely@redhat.com>
5874
5875         * testsuite/26_numerics/random/linear_congruential_engine/requirements/non_uint_neg.cc:
5876         Adjust expected error for C++20 mode.
5877         * testsuite/tr1/5_numerical_facilities/random/linear_congruential/requirements/non_uint_neg.cc:
5878         Likewise.
5879
5880 2021-04-12  Jonathan Wakely  <jwakely@redhat.com>
5881
5882         PR libstdc++/99995
5883         * testsuite/17_intro/headers/c++1998/49745.cc: Include all
5884         standard headers and XFAIL for effective-target c++20.
5885
5886 2021-04-09  François Dumont  <fdumont@gcc.gnu.org>
5887
5888         PR libstdc++/99402
5889         * include/debug/helper_functions.h (__can_advance(_InputIterator,
5890         const std::pair<_Diff, _Distance_precision>&, int)): New.
5891         (__can_advance(const _Safe_iterator<>&,
5892         const std::pair<_Diff, _Distance_precision>&, int)): New.
5893         * include/debug/macros.h (__glibcxx_check_can_increment_dist): New,
5894         use latter.
5895         (__glibcxx_check_can_increment_range): Adapt to use latter.
5896         (__glibcxx_check_can_decrement_range): Likewise.
5897         * include/debug/safe_iterator.h
5898         (_Safe_iterator<>::_M_can_advance(const std::pair<_Diff, _Distance_precision>&,
5899         int)): New.
5900         (__can_advance(const _Safe_iterator<>&,
5901         const std::pair<_Diff, _Distance_precision>&, int)): New.
5902         * include/debug/safe_iterator.tcc
5903         (_Safe_iterator<>::_M_can_advance(const std::pair<_Diff, _Distance_precision>&,
5904         int)): New.
5905         (_Safe_iterator<>::_M_valid_range(const _Safe_iterator<>&,
5906         std::pair<difference_type, _Distance_precision>&, bool)): Adapt for
5907         __dp_sign_max_size.
5908         (__copy_move_a): Adapt to use __glibcxx_check_can_increment_dist.
5909         (__copy_move_backward_a): Likewise.
5910         (__equal_aux): Likewise.
5911         * include/debug/stl_iterator.h (__can_advance(const std::reverse_iterator<>&,
5912         const std::pair<_Diff, _Distance_precision>&, int)): New.
5913         (__can_advance(const std::move_iterator<>&,
5914         const std::pair<_Diff, _Distance_precision>&, int)): New.
5915         * testsuite/25_algorithms/copy/debug/99402.cc: New test.
5916
5917 2021-04-09  Jonathan Wakely  <jwakely@redhat.com>
5918
5919         PR libstdc++/99985
5920         * include/bits/hashtable.h (_Hashtable::_S_nothrow_move()): Fix
5921         to be a valid constexpr function in C++11.
5922         * testsuite/23_containers/unordered_set/cons/99985.cc: New test.
5923
5924 2021-04-09  Jonathan Wakely  <jwakely@redhat.com>
5925
5926         * include/bits/fs_fwd.h: Fix doxygen group command.
5927         * include/bits/streambuf_iterator.h: Likewise.
5928         * include/bits/uses_allocator_args.h: Likewise.
5929         * include/std/memory: Likewise.
5930         * include/tr1/complex: Likewise.
5931
5932 2021-04-08  Jonathan Wakely  <jwakely@redhat.com>
5933
5934         * include/bits/basic_string.h: Tweak doxygen comment.
5935
5936 2021-04-08  Patrick Palka  <ppalka@redhat.com>
5937
5938         * include/std/ranges (__detail::find): Define.
5939         (split_view::_OuterIter::operator++): Apply proposed resolution
5940         of LWG 3505.
5941         * testsuite/std/ranges/adaptors/split.cc (test10): New test.
5942
5943 2021-04-08  Patrick Palka  <ppalka@redhat.com>
5944
5945         * include/std/ranges (__detail::find_if): Simplify.
5946         (__detail::find_if_not): Likewise.
5947         (__detail::min): Remove.
5948         (__detail::mismatch): Simplify.
5949         (take_view::size): Use std::min instead of __detail::min.
5950
5951 2021-04-08  Patrick Palka  <ppalka@redhat.com>
5952
5953         * include/std/ranges (__detail::__returnable_element): New
5954         concept.
5955         (elements_view): Use this concept in its constraints.  Add
5956         missing private access specifier.
5957         (elements_view::_S_get_element): Define as per LWG 3502.
5958         (elements_view::operator*, elements_view::operator[]): Use
5959         _S_get_element.
5960         (elements_view::operator++): Remove unnecessary constraint
5961         as per LWG 3492.
5962         * testsuite/std/ranges/adaptors/elements.cc (test05): New test.
5963
5964 2021-04-08  Jonathan Wakely  <jwakely@redhat.com>
5965
5966         * doc/Makefile.am (stamp-pdf-doxygen): Also grep for
5967         out-of-memory error in log file.
5968         * doc/Makefile.in: Regenerate.
5969
5970 2021-04-08  Jonathan Wakely  <jwakely@redhat.com>
5971
5972         * configure: Regenerate.
5973
5974 2021-04-08  Jonathan Wakely  <jwakely@redhat.com>
5975
5976         * include/bits/random.h: Fix doxygen group commands.
5977         * include/bits/regex_constants.h: Likewise.
5978         * include/tr1/random.h: Likewise.
5979
5980 2021-04-08  Jonathan Wakely  <jwakely@redhat.com>
5981
5982         * include/bits/hashtable.h (_Hashtable::_S_nothrow_move()):
5983         New function to determine noexcept-specifier for move
5984         constructors.
5985         (_Hashtable): Use _S_nothrow_move() on move constructors.
5986         * testsuite/23_containers/unordered_map/cons/noexcept_move_construct.cc:
5987         Correct static assertion message.
5988         * testsuite/23_containers/unordered_multimap/cons/noexcept_move_construct.cc:
5989         Likewise.
5990         * testsuite/23_containers/unordered_multiset/cons/noexcept_move_construct.cc:
5991         Likewise.
5992         * testsuite/23_containers/unordered_set/cons/noexcept_move_construct.cc:
5993         Likewise.
5994
5995 2021-04-08  Patrick Palka  <ppalka@redhat.com>
5996
5997         PR libstdc++/98384
5998         * testsuite/20_util/to_chars/long_double.cc: Don't run the test
5999         on targets without a large long double.  XFAIL the execution on
6000         targets with a non-conforming printf.
6001
6002 2021-04-08  Patrick Palka  <ppalka@redhat.com>
6003
6004         PR libstdc++/99433
6005         * include/std/ranges (__adaptor::__maybe_refwrap): Remove.
6006         (__adaptor::__adaptor_invocable): New concept.
6007         (__adaptor::__adaptor_partial_app_viable): New concept.
6008         (__adaptor::_RangeAdaptorClosure): Rewrite, turning it into a
6009         non-template base class.
6010         (__adaptor::_RangeAdaptor): Rewrite, turning it into a CRTP base
6011         class template.
6012         (__adaptor::_Partial): New class template that represents
6013         partial application of a range adaptor non-closure.
6014         (__adaptor::__pipe_invocable): New concept.
6015         (__adaptor::_Pipe): New class template.
6016         (__detail::__can_ref_view): New concept.
6017         (__detail::__can_subrange): New concept.
6018         (all): Replace the lambda here with ...
6019         (_All): ... this functor.  Add appropriate constraints.
6020         (__detail::__can_filter_view): New concept.
6021         (filter, _Filter): As in all/_All.
6022         (__detail::__can_transform): New concept.
6023         (transform, _Transform): As in all/_All.
6024         (__detail::__can_take_view): New concept.
6025         (take, _Take): As in all/_All.
6026         (__detail::__can_take_while_view): New concept.
6027         (take_while, _TakeWhile): As in all/_All.
6028         (__detail::__can_drop_view): New concept.
6029         (drop, _Drop): As in all/_All.
6030         (__detail::__can_drop_while_view): New concept.
6031         (drop_while, _DropWhile): As in all/_All.
6032         (__detail::__can_join_view): New concept.
6033         (join, _Join): As in all/_All.
6034         (__detail::__can_split_view): New concept.
6035         (split, _Split): As in all/_All.  Rename template parameter
6036         _Fp to _Pattern.
6037         (__detail::__already_common): New concept.
6038         (__detail::__can_common_view): New concept.
6039         (common, _Common): As in all/_All.
6040         (__detail::__can_reverse_view): New concept.
6041         (reverse, _Reverse): As in all/_All.
6042         (__detail::__can_elements_view): New concept.
6043         (elements, _Elements): As in all/_All.
6044         (keys, values): Adjust.
6045         * testsuite/std/ranges/adaptors/99433.cc: New test.
6046         * testsuite/std/ranges/adaptors/all.cc: No longer expect that
6047         adding empty range adaptor closure objects to a pipeline doesn't
6048         increase the size of the pipeline.
6049         (test05): New test.
6050         * testsuite/std/ranges/adaptors/common.cc (test03): New test.
6051         * testsuite/std/ranges/adaptors/drop.cc (test09): New test.
6052         * testsuite/std/ranges/adaptors/drop_while.cc (test04): New test.
6053         * testsuite/std/ranges/adaptors/elements.cc (test04): New test.
6054         * testsuite/std/ranges/adaptors/filter.cc (test06): New test.
6055         * testsuite/std/ranges/adaptors/join.cc (test09): New test.
6056         * testsuite/std/ranges/adaptors/p2281.cc: New test.
6057         * testsuite/std/ranges/adaptors/reverse.cc (test07): New test.
6058         * testsuite/std/ranges/adaptors/split.cc (test01, test04):
6059         Adjust.
6060         (test09): New test.
6061         * testsuite/std/ranges/adaptors/split_neg.cc (test01): Adjust
6062         expected error message.
6063         (test02): Likewise.  Extend test.
6064         * testsuite/std/ranges/adaptors/take.cc (test06): New test.
6065         * testsuite/std/ranges/adaptors/take_while.cc (test05): New test.
6066         * testsuite/std/ranges/adaptors/transform.cc (test07, test08):
6067         New test.
6068
6069 2021-04-08  Jonathan Wakely  <jwakely@redhat.com>
6070
6071         * include/std/string_view: Adjust Doxygen @file comment.
6072
6073 2021-04-08  Jonathan Wakely  <jwakely@redhat.com>
6074
6075         * include/std/type_traits (is_scoped_enum<T>): Constrain partial
6076         specialization to not match incomplete enum types. Use a
6077         requires-expression instead of instantiating is_convertible.
6078         (is_scoped_enum<const T>): Add as workaround for PR c++/99968.
6079         * testsuite/20_util/is_scoped_enum/value.cc: Check with
6080         incomplete types and opaque-enum-declarations.
6081
6082 2021-04-07  Jonathan Wakely  <jwakely@redhat.com>
6083
6084         PR libstdc++/99805
6085         * src/c++17/fs_path.cc (path::_M_split_cmpts): Do not call
6086         non-const member on _M_pathname, to avoid copy-on-write.
6087         * testsuite/27_io/filesystem/path/decompose/parent_path.cc:
6088         Check construction from strings that might be shared.
6089
6090 2021-04-06  Jonathan Wakely  <jwakely@redhat.com>
6091
6092         * include/bits/move.h (forward, move, move_if_noexcept)
6093         (addressof): Add _GLIBCXX_NODISCARD.
6094         * include/bits/ranges_cmp.h (identity::operator()): Add
6095         nodiscard attribute.
6096         * include/c_global/cstddef (to_integer): Likewise.
6097         * include/std/bit (bit_cast): Likewise.
6098         * include/std/utility (as_const, to_underlying): Likewise.
6099
6100 2021-04-06  Jonathan Wakely  <jwakely@redhat.com>
6101
6102         * include/bits/move.h (forward): Change static_assert message
6103         to be unambiguous about what must be true.
6104         * testsuite/20_util/forward/c_neg.cc: Adjust dg-error.
6105         * testsuite/20_util/forward/f_neg.cc: Likewise.
6106
6107 2021-04-06  Jonathan Wakely  <jwakely@redhat.com>
6108
6109         * include/bits/alloc_traits.h: Use markdown for code font.
6110         * include/bits/basic_string.h: Fix @param names.
6111         * include/bits/max_size_type.h: Remove period after @file.
6112         * include/bits/regex.h: Fix duplicate @retval names, and rename.
6113         * include/ext/pb_ds/detail/priority_queue_base_dispatch.hpp: Add
6114         group open to match existing group close.
6115         * include/ext/pb_ds/priority_queue.hpp: Add blank line before group
6116         open.
6117
6118 2021-04-06  Jonathan Wakely  <jwakely@redhat.com>
6119
6120         * include/bits/atomic_base.h: Fix doxygen group close.
6121         * include/bits/basic_ios.h: Likewise.
6122         * include/bits/forward_list.h: Likewise.
6123         * include/bits/fs_dir.h: Likewise.
6124         * include/bits/fs_ops.h: Likewise.
6125         * include/bits/fs_path.h: Likewise.
6126         * include/bits/functional_hash.h: Likewise.
6127         * include/bits/gslice.h: Likewise.
6128         * include/bits/gslice_array.h: Likewise.
6129         * include/bits/hashtable_policy.h: Likewise.
6130         * include/bits/indirect_array.h: Likewise.
6131         * include/bits/locale_classes.h: Likewise.
6132         * include/bits/locale_facets.h: Likewise.
6133         * include/bits/locale_facets_nonio.h: Likewise.
6134         * include/bits/mask_array.h: Likewise.
6135         * include/bits/refwrap.h: Likewise.
6136         * include/bits/regex.h: Likewise.
6137         * include/bits/regex_automaton.h: Likewise.
6138         * include/bits/regex_compiler.h: Likewise.
6139         * include/bits/regex_constants.h: Likewise.
6140         * include/bits/regex_error.h: Likewise.
6141         * include/bits/regex_executor.h: Likewise.
6142         * include/bits/regex_scanner.h: Likewise.
6143         * include/bits/shared_ptr.h: Likewise.
6144         * include/bits/shared_ptr_atomic.h: Likewise.
6145         * include/bits/shared_ptr_base.h: Likewise.
6146         * include/bits/slice_array.h: Likewise.
6147         * include/bits/specfun.h: Likewise.
6148         * include/bits/std_function.h: Likewise.
6149         * include/bits/std_mutex.h: Likewise.
6150         * include/bits/stl_deque.h: Likewise.
6151         * include/bits/stl_iterator.h: Likewise.
6152         * include/bits/stl_iterator_base_types.h: Likewise.
6153         * include/bits/stl_map.h: Likewise.
6154         * include/bits/stl_multimap.h: Likewise.
6155         * include/bits/stl_multiset.h: Likewise.
6156         * include/bits/stl_numeric.h: Likewise.
6157         * include/bits/stl_pair.h: Likewise.
6158         * include/bits/stl_set.h: Likewise.
6159         * include/bits/stl_uninitialized.h: Likewise.
6160         * include/bits/stream_iterator.h: Likewise.
6161         * include/bits/streambuf_iterator.h: Likewise.
6162         * include/bits/unique_ptr.h: Likewise.
6163         * include/bits/unordered_map.h: Likewise.
6164         * include/bits/unordered_set.h: Likewise.
6165         * include/decimal/decimal: Likewise.
6166         * include/experimental/any: Likewise.
6167         * include/experimental/array: Likewise.
6168         * include/experimental/bits/fs_dir.h: Likewise.
6169         * include/experimental/bits/fs_fwd.h: Likewise.
6170         * include/experimental/bits/fs_ops.h: Likewise.
6171         * include/experimental/bits/fs_path.h: Likewise.
6172         * include/experimental/buffer: Likewise.
6173         * include/experimental/internet: Likewise.
6174         * include/experimental/optional: Likewise.
6175         * include/experimental/propagate_const: Likewise.
6176         * include/experimental/socket: Likewise.
6177         * include/ext/pb_ds/assoc_container.hpp: Likewise.
6178         * include/ext/pb_ds/detail/priority_queue_base_dispatch.hpp:
6179         Likewise.
6180         * include/ext/pb_ds/detail/tree_policy/node_metadata_selector.hpp: Likewise.
6181         * include/ext/pb_ds/detail/trie_policy/node_metadata_selector.hpp: Likewise.
6182         * include/ext/pb_ds/detail/types_traits.hpp: Likewise.
6183         * include/ext/pb_ds/exception.hpp: Likewise.
6184         * include/ext/pb_ds/priority_queue.hpp: Likewise.
6185         * include/ext/pb_ds/tag_and_trait.hpp: Likewise.
6186         * include/ext/random: Likewise.
6187         * include/std/any: Likewise.
6188         * include/std/atomic: Likewise.
6189         * include/std/bitset: Likewise.
6190         * include/std/chrono: Likewise.
6191         * include/std/complex: Likewise.
6192         * include/std/condition_variable: Likewise.
6193         * include/std/fstream: Likewise.
6194         * include/std/future: Likewise.
6195         * include/std/iostream: Likewise.
6196         * include/std/istream: Likewise.
6197         * include/std/mutex: Likewise.
6198         * include/std/numeric: Likewise.
6199         * include/std/ostream: Likewise.
6200         * include/std/ratio: Likewise.
6201         * include/std/shared_mutex: Likewise.
6202         * include/std/stdexcept: Likewise.
6203         * include/std/streambuf: Likewise.
6204         * include/std/system_error: Likewise.
6205         * include/std/thread: Likewise.
6206         * include/std/valarray: Likewise.
6207         * include/std/variant: Likewise.
6208         * include/tr1/cmath: Likewise.
6209         * include/tr1/regex: Likewise.
6210         * include/tr2/dynamic_bitset: Likewise.
6211         * libsupc++/atomic_lockfree_defines.h: Likewise.
6212         * libsupc++/exception: Likewise.
6213         * libsupc++/exception.h: Likewise.
6214         * libsupc++/exception_ptr.h: Likewise.
6215         * libsupc++/nested_exception.h: Likewise.
6216
6217 2021-03-31  Alexandre Oliva  <oliva@adacore.com>
6218
6219         * testsuite/30_threads/future/members/poll.cc: Use faster
6220         after-ready call in the calibration loop.
6221
6222 2021-03-29  Jonathan Wakely  <jwakely@redhat.com>
6223
6224         * doc/xml/manual/status_cxx2017.xml: Adjust link for PSTL.
6225         * doc/html/manual/status.html: Regenerate.
6226
6227 2021-03-28  François Dumont  <fdumont@gcc.gnu.org>
6228
6229         * include/debug/forward_list
6230         (forward_list(forward_list&&, const allocator_type&)): Add noexcept qualification.
6231         * include/debug/list (list(list&&, const allocator_type&)): Likewise and add
6232         call to safe container allocator aware move constructor.
6233         * include/debug/vector (vector(vector&&, const allocator_type&)):
6234         Fix noexcept qualification.
6235         * testsuite/23_containers/forward_list/cons/noexcept_move_construct.cc:
6236         Add allocator-extended move constructor noexceot qualification check.
6237         * testsuite/23_containers/list/cons/noexcept_move_construct.cc: Likewise.
6238
6239 2021-03-26  Jonathan Wakely  <jwakely@redhat.com>
6240
6241         * src/c++11/random.cc (USE_LCG): Define when a pseudo-random
6242         fallback is needed.
6243         [USE_LCG] (bad_seed, construct_lcg_at, destroy_lcg_at, __lcg):
6244         New helper functions and callback.
6245         (random_device::_M_init): Add 'prng' and 'all' enumerators.
6246         Replace switch with fallthrough with a series of 'if' statements.
6247         [USE_LCG]: Construct an lcg_type engine and use __lcg when cpuid
6248         checks fail.
6249         (random_device::_M_init_pretr1) [USE_MT19937]: Accept "prng"
6250         token.
6251         (random_device::_M_getval): Check for callback unconditionally
6252         and always pass _M_file pointer.
6253         * testsuite/26_numerics/random/random_device/85494.cc: Remove
6254         effective-target check. Use new random_device_available helper.
6255         * testsuite/26_numerics/random/random_device/94087.cc: Likewise.
6256         * testsuite/26_numerics/random/random_device/cons/default-cow.cc:
6257         Remove effective-target check.
6258         * testsuite/26_numerics/random/random_device/cons/default.cc:
6259         Likewise.
6260         * testsuite/26_numerics/random/random_device/cons/token.cc: Use
6261         new random_device_available helper. Test "prng" token.
6262         * testsuite/util/testsuite_random.h (random_device_available):
6263         New helper function.
6264
6265 2021-03-25  François Dumont  <fdumont@gcc.gnu.org>
6266
6267         * include/debug/string
6268         (basic_string(const basic_string&, const _Alloc&)): Define even if !_GLIBCXX_USE_CXX11_ABI.
6269         (basic_string(basic_string&&, const _Alloc&)): Likewise and add noexcept qualification.
6270         (basic_string<>::erase): Adapt to take __const_iterator.
6271         (basic_string(const _CharT*, const _Allocator&)): Remove assign call.
6272         (basic_string<>::insert(const_iterator, _InputIte, _InputIte)): Try to
6273         remove iterator debug layer even if !_GLIBCXX_USE_CXX11_ABI.
6274         [_GLIBCXX_USE_CHAR8_T] (__gnu_debug::u8string): New.
6275         (__gnu_debug::u16string, __gnu_debug::u32string): New.
6276         (std::hash<__gnu_debug::basic_string<>>): New partial specialization.
6277         (std::__is_fast_hash<__gnu_debug::basic_string<>>): Likewise.
6278         * testsuite/util/exception/safety.h
6279         (erase_base<__gnu_debug::basic_string<>>): New partial specialization.
6280         (insert_base<__gnu_debug::basic_string<>>): Likewise.
6281         * testsuite/util/testsuite_container_traits.h (traits<__gnu_debug::basic_string<>>):
6282         New partial specialization.
6283         * testsuite/21_strings/basic_string/hash/debug.cc: New test.
6284         * testsuite/21_strings/basic_string/requirements/citerators.cc:
6285         Add test on __gnu_debug::string.
6286         * testsuite/21_strings/basic_string/requirements/dr438/constructor.cc: Likewise.
6287         * testsuite/21_strings/basic_string/requirements/exception/basic.cc: Likewise.
6288         * testsuite/21_strings/basic_string/requirements/exception/generation_prohibited.cc:
6289         Likewise.
6290         * testsuite/21_strings/basic_string/requirements/exception/propagation_consistent.cc:
6291         Likewise.
6292         * testsuite/21_strings/basic_string/requirements/explicit_instantiation/char/1.cc:
6293         Likewise.
6294         * testsuite/21_strings/basic_string/requirements/explicit_instantiation/char16_t/1.cc:
6295         Likewise.
6296         * testsuite/21_strings/basic_string/requirements/explicit_instantiation/char32_t/1.cc:
6297         Likewise.
6298         * testsuite/21_strings/basic_string/requirements/explicit_instantiation/char8_t/1.cc:
6299         Likewise.
6300         * testsuite/21_strings/basic_string/requirements/explicit_instantiation/wchar_t/1.cc:
6301         Likewise.
6302         * testsuite/21_strings/basic_string/requirements/typedefs.cc: Likewise.
6303
6304 2021-03-25  Jakub Jelinek  <jakub@redhat.com>
6305
6306         PR c++/99672
6307         * testsuite/18_support/source_location/consteval.cc (main): Adjust
6308         expected column numbers.
6309         * testsuite/18_support/source_location/1.cc (main): Likewise.
6310
6311 2021-03-25  Jonathan Wakely  <jwakely@redhat.com>
6312
6313         * libsupc++/new_opa.cc [!_GLIBCXX_HOSTED]: Declare malloc.
6314
6315 2021-03-25  Jonathan Wakely  <jwakely@redhat.com>
6316
6317         * testsuite/util/exception/safety.h (setup_base::generate):
6318         Support seeding random engine.
6319         (erase_point, erase_range): Adjust range of random numbers to
6320         ensure dereferenceable iterators are used where required.
6321         (generation_prohibited::run): Do not try to erase from empty
6322         containers.
6323         * testsuite/util/testsuite_containergen.h (test_containers):
6324         Support seeding random engine.
6325
6326 2021-03-23  Jonathan Wakely  <jwakely@redhat.com>
6327
6328         * testsuite/std/ranges/adaptors/reverse.cc: Replace duplicated
6329         line with a check that uses the const being/end overloads.
6330
6331 2021-03-23  Moritz Sichert  <sichert@in.tum.de>
6332
6333         * include/std/ranges (reverse_view::begin, reverse_view::end):
6334         Qualify make_reverse_iterator calls to avoid ADL.
6335         * testsuite/std/ranges/adaptors/reverse.cc: Test that
6336         views::reverse works when make_reverse_iterator is defined
6337         in an associated namespace.
6338
6339 2021-03-23  Jonathan Wakely  <jwakely@redhat.com>
6340
6341         * include/bits/c++config (_GLIBCXX_LONG_DOUBLE_ALT128_COMPAT):
6342         Do not define when compiling with Clang.
6343
6344 2021-03-22  Jonathan Wakely  <jwakely@redhat.com>
6345
6346         * include/std/string_view (basic_string_view(Range&&)): Define new
6347         constructor and deduction guide.
6348         * testsuite/21_strings/basic_string_view/cons/char/range_c++20.cc: New test.
6349         * testsuite/21_strings/basic_string_view/cons/wchar_t/range_c++20.cc: New test.
6350
6351 2021-03-22  Jonathan Wakely  <jwakely@redhat.com>
6352
6353         * include/bits/range_access.h (begin(T (&)[N]), end(T (&)[N])):
6354         Add missing 'noexcept' as per LWG 2280.
6355         (rbegin(T (&)[N]), rend(T (&)[N]), rbegin(initializer_list<T>))
6356         (rend(initializer_list<T>)): Add 'noexcept' as per LWG 3537.
6357         * testsuite/24_iterators/range_access/range_access.cc: Check for
6358         expected noexcept specifiers. Check result types of generic
6359         std::begin and std::end overloads.
6360         * testsuite/24_iterators/range_access/range_access_cpp14.cc:
6361         Check for expected noexcept specifiers.
6362         * testsuite/24_iterators/range_access/range_access_cpp17.cc:
6363         Likewise.
6364
6365 2021-03-19  Jonathan Wakely  <jwakely@redhat.com>
6366
6367         * include/std/type_traits (is_scoped_enum): Define.
6368         * include/std/version (__cpp_lib_is_scoped_enum): Define.
6369         * testsuite/20_util/is_scoped_enum/value.cc: New test.
6370         * testsuite/20_util/is_scoped_enum/version.cc: New test.
6371
6372 2021-03-16  Jonathan Wakely  <jwakely@redhat.com>
6373
6374         PR libstdc++/99341
6375         * config/abi/post/aarch64-linux-gnu/baseline_symbols.txt: Remove
6376         std::once_flag symbols.
6377         * config/abi/post/ia64-linux-gnu/baseline_symbols.txt: Likewise.
6378         * config/abi/post/m68k-linux-gnu/baseline_symbols.txt: Likewise.
6379         * config/abi/post/riscv64-linux-gnu/baseline_symbols.txt:
6380         Likewise.
6381         * config/abi/pre/gnu.ver: Likewise.
6382         * src/c++11/mutex.cc [_GLIBCXX_HAVE_LINUX_FUTEX]
6383         (struct __once_flag_compat): Remove.
6384         (_ZNSt9once_flag11_M_activateEv): Remove.
6385         (_ZNSt9once_flag9_M_finishEb): Remove.
6386
6387 2021-03-16  Jonathan Wakely  <jwakely@redhat.com>
6388
6389         PR libstdc++/99341
6390         * include/std/mutex [_GLIBCXX_HAVE_LINUX_FUTEX] (once_flag):
6391         Revert to pthread_once_t implementation.
6392         [_GLIBCXX_HAVE_LINUX_FUTEX] (call_once): Likewise.
6393         * src/c++11/mutex.cc [_GLIBCXX_HAVE_LINUX_FUTEX]
6394         (struct __once_flag_compat): New type matching the reverted
6395         implementation of once_flag using futexes.
6396         (once_flag::_M_activate): Remove, replace with ...
6397         (_ZNSt9once_flag11_M_activateEv): ... alias symbol.
6398         (once_flag::_M_finish): Remove, replace with ...
6399         (_ZNSt9once_flag9_M_finishEb): ... alias symbol.
6400         * testsuite/30_threads/call_once/66146.cc: Removed.
6401
6402 2021-03-15  Iain Sandoe  <iain@sandoe.co.uk>
6403
6404         * testsuite/17_intro/names.cc: Exclude j from the list
6405         of test symbols for Darwin.
6406
6407 2021-03-15  Iain Sandoe  <iain@sandoe.co.uk>
6408
6409         * config/os/bsd/darwin/ppc-extra.ver: Add matching for
6410         to_chars and from_chars for long double.
6411
6412 2021-03-15  Patrick Palka  <ppalka@redhat.com>
6413
6414         * include/bits/max_size_type.h (__max_size_type::operator _Tp):
6415         Fix formatting.
6416         (__max_size_type::operator++): Define.
6417         (__max_size_type::operator--): Likewise.
6418         (__max_size_type::operator<=>): Conditionally define (in place
6419         of the other comparison operators).
6420         (__max_diff_type::operator _Tp): Fix formatting.
6421         (__max_diff_type::operator++): Define.
6422         (__max_diff_type::operator--): Likewise.
6423         (__max_diff_type::operator<=>): Conditionally define (in place
6424         of the other comparison operators).
6425         * testsuite/std/ranges/iota/max_size_type.cc (test01): Test
6426         these operator overloads.
6427
6428 2021-03-15  Caroline Tice  <cmtice@google.com>
6429
6430         PR libstdc++/99172
6431         * src/Makefile.am (AM_CXXFLAGS_PRE, AM_CXXFLAGS): Add
6432         AM_CXXFLAGS_PRE with the old definition of AM_CXXFLAGS; make
6433         AM_CXXFLAGS to be AM_CXXFLAGS_PRE with '-fvtable-verify=std'
6434         filtered out.
6435         * src/Makefile.in: Regenerate.
6436
6437 2021-03-11  Patrick Palka  <ppalka@redhat.com>
6438
6439         * src/c++17/floating_to_chars.cc: Simplify the file as if
6440         __SIZEOF_INT128__ is always defined.
6441         [!defined __SIZEOF_INT128__]: Include "uint128_t.h".  Define
6442         a base-10 to_chars overload for the uint128_t class type.
6443         * src/c++17/uint128_t.h: New file.
6444         * testsuite/20_util/to_chars/long_double.cc: No longer expect an
6445         execution FAIL on targets that have a large long double type
6446         but lack __int128.
6447
6448 2021-03-11  Patrick Palka  <ppalka@redhat.com>
6449
6450         * src/c++17/ryu/LOCAL_PATCHES: Update.
6451         * src/c++17/ryu/d2s_intrinsics.h: Don't define uint128_t.
6452         * src/c++17/ryu/generic_128.h: Likewise.
6453         * src/c++17/ryu/ryu_generic_128.h (struct floating_decimal_128):
6454         Use uint128_t instead of __uint128_t.
6455         (generic_binary_to_decimal): Likewise.
6456
6457 2021-03-11  Patrick Palka  <ppalka@redhat.com>
6458
6459         * src/c++17/ryu/LOCAL_PATCHES: New file.
6460
6461 2021-03-11  Patrick Palka  <ppalka@redhat.com>
6462
6463         * src/c++17/floating_to_chars.cc (uint128_t): New conditionally
6464         defined alias of unsigned __int128.
6465         (floating_type_traits_binary128::mantissa_t): Use uint128_t
6466         instead of unsigned __int128.
6467         (floating_type_traits<long double>::mantissa_t)
6468         [LONG_DOUBLE_KIND == LDK_IBM128]: Likewise.
6469         (get_ieee_repr): Likewise.  Make casts from uint_t to mantissa_t
6470         and uint32_t explicit.  Simplify the extraction of mantissa,
6471         exponent and sign bit.
6472
6473 2021-03-11  Jonathan Wakely  <jwakely@redhat.com>
6474
6475         * include/std/barrier (barrier::arrival_token): New move-only
6476         class that encapsulates the underlying token value.
6477
6478 2021-03-11  Jonathan Wakely  <jwakely@redhat.com>
6479
6480         * python/libstdcxx/v6/printers.py (find_type): Use tag attribute
6481         instead of unqualified() method.
6482
6483 2021-03-11  Jonathan Wakely  <jwakely@redhat.com>
6484
6485         PR libstdc++/99537
6486         * include/std/stop_token (_Stop_state_t::_M_release_ownership):
6487         Use acq_rel memory ordering.
6488
6489 2021-03-11  Jonathan Wakely  <jwakely@redhat.com>
6490
6491         PR libstdc++/99533
6492         * src/c++17/fs_dir.cc (recursive_directory_iterator): Use new
6493         helper function to check for permission denied errors.
6494         * src/filesystem/dir.cc (recursive_directory_iterator):
6495         Likewise.
6496         * src/filesystem/dir-common.h (is_permission_denied_error): New
6497         helper function.
6498
6499 2021-03-11  Jonathan Wakely  <jwakely@redhat.com>
6500
6501         PR libstdc++/99536
6502         * include/bits/random.h (normal_distribution): Use
6503         default-initializer for _M_saved and _M_saved_available.
6504
6505 2021-03-10  John David Anglin  <danglin@gcc.gnu.org>
6506
6507         * testsuite/29_atomics/atomic/wait_notify/bool.cc: Add options to
6508         link with libatomic.
6509         * testsuite/29_atomics/atomic/wait_notify/generic.cc: Likewise.
6510         * testsuite/29_atomics/atomic/wait_notify/pointers.cc: Likewise.
6511         * testsuite/29_atomics/atomic_flag/wait_notify/1.cc: Likewise.
6512         * testsuite/30_threads/barrier/arrive.cc: Likewise.
6513         * testsuite/30_threads/barrier/arrive_and_drop.cc: Likewise.
6514         * testsuite/30_threads/barrier/arrive_and_wait.cc: Likewise.
6515         * testsuite/30_threads/barrier/completion.cc: Likewise.
6516         * testsuite/30_threads/latch/3.cc: Likewise.
6517         * testsuite/30_threads/semaphore/try_acquire.cc: Likewise.
6518         * testsuite/30_threads/semaphore/try_acquire_for.cc: Likewise.
6519         * testsuite/30_threads/semaphore/try_acquire_until.cc: Likewise.
6520
6521 2021-03-10  Jonathan Wakely  <jwakely@redhat.com>
6522
6523         PR libstdc++/99413
6524         * include/bits/align.h: Include debug/assertions.h.
6525         * include/bits/codecvt.h: Include bits/c++config.h.
6526         * include/bits/enable_special_members.h: Likewise.
6527         * include/bits/erase_if.h: Likewise.
6528         * include/bits/functional_hash.h: Include <type_traits>.
6529         * include/bits/invoke.h: Include bits/move.h.
6530         * include/bits/ostream_insert.h: Include bits/exception_defines.h.
6531         * include/bits/parse_numbers.h: Include <type_traits>.
6532         * include/bits/predefined_ops.h: Include bits/c++config.h.
6533         * include/bits/range_access.h: Include bits/stl_iterator.h.
6534         * include/bits/stl_bvector.h: Do not include bits/stl_vector.h.
6535         * include/bits/stl_iterator.h: Include bits/stl_iterator_base_types.h.
6536         * include/bits/stl_uninitialized.h: Include bits/stl_algobase.h.
6537         * include/bits/uniform_int_dist.h: Include bits/concept_check.h.
6538         * include/bits/unique_lock.h: Include bits/std_mutex.h.
6539         * include/debug/assertions.h: Include bits/c++config.h.
6540
6541 2021-03-10  Jonathan Wakely  <jwakely@redhat.com>
6542
6543         * include/bits/ranges_cmp.h (__eq_builtin_ptr_cmp): Remove.
6544         (ranges::equal_to, ranges::not_equal_to): Do not constrain
6545         with __eq_builtin_ptr_cmp.
6546         (ranges::less, ranges::greater, ranges::less_equal)
6547         (ranges::greater_equal): Do not constrain with
6548         __less_builtin_ptr_cmp.
6549         * libsupc++/compare (compare_three_way): Do not constrain with
6550         __3way_builtin_ptr_cmp.
6551         * testsuite/18_support/comparisons/object/builtin-ptr-three-way.cc: Moved to...
6552         * testsuite/18_support/comparisons/object/lwg3530.cc: ...here.
6553         * testsuite/20_util/function_objects/range.cmp/lwg3530.cc: New test.
6554
6555 2021-03-10  Jonathan Wakely  <jwakely@redhat.com>
6556
6557         * testsuite/std/time/syn_c++20.cc: Enable synopsis checks for
6558         C++20 calendar types.
6559
6560 2021-03-06  Jakub Jelinek  <jakub@redhat.com>
6561
6562         PR libstdc++/99396
6563         * include/std/bit (__rotl, __rotr): Add optimized variants for power of
6564         two _Nd which the compiler can pattern match the rotates.
6565
6566 2021-03-04  Jonathan Wakely  <jwakely@redhat.com>
6567
6568         PR libstdc++/99382
6569         * testsuite/20_util/specialized_algorithms/uninitialized_default_n/sizes.cc:
6570         Make storage larger than required. Verify no write to the last
6571         element.
6572         * testsuite/20_util/specialized_algorithms/uninitialized_value_construct_n/sizes.cc:
6573         Likewise.
6574
6575 2021-03-03  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
6576
6577         * config/abi/post/i386-solaris/baseline_symbols.txt: Regenerate.
6578         * config/abi/post/i386-solaris/amd64/baseline_symbols.txt:
6579         Likewise.
6580         * config/abi/post/sparc-solaris/baseline_symbols.txt: Likewise.
6581         * config/abi/post/sparc-solaris/sparcv9/baseline_symbols.txt:
6582         Likewise.
6583
6584 2021-03-03  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
6585
6586         * include/experimental/bits/simd.h: Replace reserved _X, _B by
6587         _Xp, _Bp.
6588         * include/experimental/bits/simd_builtin.h: Likewise.
6589         * include/experimental/bits/simd_x86.h: Likewise.
6590
6591 2021-02-27  Jonathan Wakely  <jwakely@redhat.com>
6592
6593         PR libstdc++/99301
6594         * include/std/chrono (year_month_day::_M_days_since_epoch()):
6595         Convert chrono::month and chrono::day to unsigned before
6596         converting to uint32_t.
6597
6598 2021-02-25  Jonathan Wakely  <jwakely@redhat.com>
6599
6600         * include/std/chrono (year_month_day::_S_from_days): Perform
6601         all calculations with type uint32_t.
6602
6603 2021-02-25  Jonathan Wakely  <jwakely@redhat.com>
6604
6605         * doc/xml/manual/abi.xml: Document versioning for GCC 11.
6606         * doc/html/manual/abi.html: Regenerate.
6607
6608 2021-02-25  Jonathan Wakely  <jwakely@redhat.com>
6609
6610         PR libstdc++/99270
6611         * testsuite/27_io/headers/cstdio/types_std.cc: Use pointer to
6612         FILE instead of FILE.
6613
6614 2021-02-25  Andreas Schwab  <schwab@suse.de>
6615
6616         * config/abi/post/aarch64-linux-gnu/baseline_symbols.txt: Update.
6617         * config/abi/post/ia64-linux-gnu/baseline_symbols.txt: Update.
6618         * config/abi/post/m68k-linux-gnu/baseline_symbols.txt: Update.
6619         * config/abi/post/riscv64-linux-gnu/baseline_symbols.txt: Update.
6620
6621 2021-02-25  Jonathan Wakely  <jwakely@redhat.com>
6622
6623         PR libstdc++/99265
6624         * include/std/chrono (year_month_day::_S_from_days): Cast long
6625         to int explicitly.
6626
6627 2021-02-25  Jonathan Wakely  <jwakely@redhat.com>
6628
6629         * include/std/utility (to_underlying): Define.
6630         * include/std/version (__cpp_lib_to_underlying): Define.
6631         * testsuite/20_util/to_underlying/1.cc: New test.
6632         * testsuite/20_util/to_underlying/version.cc: New test.
6633
6634 2021-02-24  Jonathan Wakely  <jwakely@redhat.com>
6635
6636         PR libstdc++/99261
6637         * src/c++17/floating_to_chars.cc (sprintf_ld): Add extra args
6638         before value to be printed.
6639
6640 2021-02-24  Patrick Palka  <ppalka@redhat.com>
6641
6642         * src/c++17/floating_to_chars.cc (__floating_to_chars_precision):
6643         Relax the condition that guards the printf code path to accept
6644         F128_type as well as long double.
6645
6646 2021-02-24  Cassio Neri  <cassio.neri@gmail.com>
6647
6648         * include/std/chrono (year_month_day_last:day): New
6649         implementation.
6650
6651 2021-02-24  Cassio Neri  <cassio.neri@gmail.com>
6652
6653         * include/std/chrono (year::is_leap): New implementation.
6654         * testsuite/std/time/year/2.cc: New test.
6655
6656 2021-02-24  Cassio Neri  <cassio.neri@gmail.com>
6657
6658         * include/std/chrono (year_month_day::_M_days_since_epoch):
6659         New implementation.
6660         * testsuite/std/time/year_month_day/4.cc: New test.
6661
6662 2021-02-24  Cassio Neri  <cassio.neri@gmail.com>
6663
6664         * include/std/chrono (year_month_day::_S_from_days): New
6665         implementation.
6666         * testsuite/std/time/year_month_day/3.cc: New test.
6667
6668 2021-02-24  Patrick Palka  <ppalka@redhat.com>
6669
6670         PR libstdc++/98384
6671         * testsuite/20_util/to_chars/long_double.cc: Include <optional>.
6672         (test01): Simplify verifying the nearby values by using a
6673         2-iteration loop and a dedicated output buffer to check that the
6674         nearby values are different.  Factor out the printf-based
6675         verification into a local function, and check that the leading
6676         hex digits agree before comparing to the output of printf.  Also
6677         verify the output by round-tripping it through from_chars.
6678
6679 2021-02-24  Jonathan Wakely  <jwakely@redhat.com>
6680
6681         PR libstdc++/98389
6682         * config/abi/pre/gnu.ver (GLIBCXX_3.4.29): Do not match to_chars
6683         symbols for long double arguments mangled as 'g'.
6684         * config/os/gnu-linux/ldbl-extra.ver: Likewise.
6685         * config/os/gnu-linux/ldbl-ieee128-extra.ver: Likewise.
6686         * src/c++17/Makefile.am [GLIBCXX_LDBL_ALT128_COMPAT_TRUE]:
6687         Use -mabi=ibmlongdouble for floating_to_chars.cc.
6688         * src/c++17/Makefile.in: Regenerate.
6689         * src/c++17/floating_to_chars.cc (floating_type_traits_binary128):
6690         New type defining type traits of IEEE binary128 format.
6691         (floating_type_traits<__float128>): Define specialization.
6692         (floating_type_traits<long double>): Define in terms of
6693         floating_type_traits_binary128 when appropriate.
6694         (floating_to_shortest_scientific): Handle __float128.
6695         (sprintf_ld): New function template for printing a long double
6696         or __ieee128 value using sprintf.
6697         (__floating_to_chars_shortest, __floating_to_chars_precision):
6698         Use sprintf_ld.
6699         (to_chars): Define overloads for __float128.
6700
6701 2021-02-24  Jonathan Wakely  <jwakely@redhat.com>
6702
6703         * testsuite/17_intro/names.cc: Undefine 'u' on powerpc*-linux*.
6704
6705 2021-02-23  Martin Sebor  <msebor@redhat.com>
6706
6707         PR c++/99074
6708         * libsupc++/dyncast.cc (__dynamic_cast): Return null when
6709         first argument is null.
6710
6711 2021-02-23  Jakub Jelinek  <jakub@redhat.com>
6712
6713         PR libstdc++/99181
6714         * testsuite/21_strings/char_traits/requirements/char/99181.cc: New
6715         test.
6716
6717 2021-02-23  Jakub Jelinek  <jakub@redhat.com>
6718
6719         PR libstdc++/99181
6720         * include/bits/char_traits.h (char_traits<char>::compare): For
6721         constexpr evaluation don't call
6722         __gnu_cxx::char_traits<char_type>::compare but do the comparison loop
6723         directly.
6724
6725 2021-02-23  Jakub Jelinek  <jakub@redhat.com>
6726
6727         PR libstdc++/97549
6728         * include/pstl/parallel_backend_serial.h: Remove __pstl::__par_backend.
6729
6730 2021-02-23  Patrick Palka  <ppalka@redhat.com>
6731
6732         PR libstdc++/98384
6733         * src/c++17/floating_to_chars.cc (get_ieee_repr): Extract
6734         the high- and low-order parts from an IBM long double value
6735         in an endian-agnostic way.
6736
6737 2021-02-19  Jonathan Wakely  <jwakely@redhat.com>
6738
6739         * include/bits/atomic_wait.h (__thread_relax()): Call
6740         __thread_yield() not __gthread_yield().
6741
6742 2021-02-15  Jonathan Wakely  <jwakely@redhat.com>
6743
6744         * include/bits/atomic_wait.h (__thread_yield()): Check
6745         _GLIBCXX_HAS_GTHREADS before using __gthread_yield.
6746         (__thread_relax()): Use __thread_yield() instead of repeating
6747         the preprocessor checks for __gthread_yield.
6748
6749 2021-02-15  Jonathan Wakely  <jwakely@redhat.com>
6750
6751         * include/std/mutex (once_flag::_M_activate()): Add explicit
6752         return statement for passive case.
6753         (once_flag::_M_finish(bool)): Use reserved name for parameter.
6754
6755 2021-02-14  Jonathan Wakely  <jwakely@redhat.com>
6756
6757         PR libstdc++/99096
6758         * testsuite/util/testsuite_fs.h: Always include <unistd.h>.
6759
6760 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
6761
6762         PR libstdc++/88881
6763         * src/c++17/fs_ops.cc (fs::symlink_status): Re-enable workaround.
6764
6765 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
6766
6767         * doc/xml/manual/status_cxx2014.xml: Document implementation
6768         specific properties of std::experimental::filesystem::rename.
6769         * doc/xml/manual/status_cxx2017.xml: Document implementation
6770         specific properties of std::filesystem::rename.
6771         * doc/html/*: Regenerate.
6772         * src/c++17/fs_ops.cc (fs::rename): Implement correct behaviour
6773         for directories on Windows.
6774         * src/filesystem/ops-common.h (__gnu_posix::rename): Use
6775         MoveFileExW on Windows.
6776         * testsuite/27_io/filesystem/operations/rename.cc: New test.
6777         * testsuite/experimental/filesystem/operations/rename.cc: New test.
6778
6779 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
6780
6781         * testsuite/util/testsuite_fs.h (nonexistent_path): Add
6782         random number to the path.
6783
6784 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
6785
6786         * include/experimental/internet (address_v6::to_string): Include
6787         scope ID in string.
6788         * testsuite/experimental/net/internet/address/v6/members.cc:
6789         Test to_string() results.
6790
6791 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
6792
6793         * include/experimental/internet (address_v6::any): Avoid using
6794         memcpy in constexpr function.
6795         (address_v6::loopback): Likewise.
6796         (make_address_v6): Fix missing return statements on error paths.
6797         * include/experimental/io_context: Avoid -Wdangling-else
6798         warning.
6799         * testsuite/experimental/net/internet/address/v4/members.cc:
6800         Remove unused variables.
6801         * testsuite/experimental/net/internet/address/v6/members.cc:
6802         New test.
6803
6804 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
6805
6806         * include/bits/shared_ptr_base.h (__shared_ptr::_M_get_deleter):
6807         Add unused attribute to parameter.
6808         * src/c++11/shared_ptr.cc (_Sp_make_shared_tag::_S_eq):
6809         Likewise.
6810
6811 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
6812
6813         * testsuite/27_io/basic_ostream/emit/1.cc: Expect test to fail
6814         if -fno-rtti is used.
6815         * testsuite/30_threads/async/forced_unwind.cc: Expect test
6816         to abort if -fno-rtti is used.
6817
6818 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
6819
6820         * testsuite/util/testsuite_allocator.h (memory_resource):
6821         Remove requirement for RTTI and exceptions to be enabled.
6822
6823 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
6824
6825         * testsuite/27_io/basic_istringstream/rdbuf/char/2832.cc: Use
6826         static_cast when RTTI is disabled.
6827         * testsuite/27_io/basic_istringstream/rdbuf/wchar_t/2832.cc:
6828         Likewise.
6829         * testsuite/27_io/basic_ostringstream/rdbuf/char/2832.cc:
6830         Likewise.
6831         * testsuite/27_io/basic_ostringstream/rdbuf/wchar_t/2832.cc:
6832         Likewise.
6833         * testsuite/27_io/basic_stringstream/str/char/2.cc:
6834         Likewise.
6835         * testsuite/27_io/basic_stringstream/str/wchar_t/2.cc:
6836         Likewise.
6837
6838 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
6839
6840         * include/std/ostream (__syncbuf_base::_S_get): Mark parameter
6841         as unused and only use dynamic_cast when RTTI is enabled.
6842
6843 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
6844
6845         PR libstdc++/99077
6846         * src/c++11/cxx11-ios_failure.cc (__ios_failure(const char*, int)):
6847         Change int parameter to error_code, to match std::ios_failure.
6848         (__throw_ios_failure(const char*, int)): Construct error_code
6849         from int parameter.
6850
6851 2021-02-11  Jonathan Wakely  <jwakely@redhat.com>
6852
6853         * libsupc++/eh_ptr.cc (_GLIBCXX_EH_PTR_RELOPS_COMPAT): Define
6854         new macro.
6855         * libsupc++/exception_ptr.h (_GLIBCXX_EH_PTR_USED): Check new
6856         macro instead of _GLIBCXX_EH_PTR_COMPAT.
6857         (operator==): Likewise.
6858
6859 2021-02-11  Jonathan Wakely  <jwakely@redhat.com>
6860
6861         PR libstdc++/99058
6862         * doc/xml/manual/status_cxx2011.xml: Document when support
6863         became stable.
6864         * doc/xml/manual/status_cxx2014.xml: Likewise.
6865         * doc/xml/manual/status_cxx2017.xml: Likewise.
6866         * doc/html/manual/status.html: Regenerate.
6867
6868 2021-02-10  Jonathan Wakely  <jwakely@redhat.com>
6869
6870         PR libstdc++/88881
6871         * src/c++17/fs_ops.cc (fs::status): Re-enable workaround.
6872
6873 2021-02-10  Jonathan Wakely  <jwakely@redhat.com>
6874
6875         * src/c++17/fs_ops.cc (fs::create_hard_link, fs::equivalent)
6876         (fs::remove): Use std::system_category() for error codes from
6877         GetLastError().
6878         * src/filesystem/ops.cc (fs::create_hard_link, fs::remove):
6879         Likewise.
6880
6881 2021-02-10  Jonathan Wakely  <jwakely@redhat.com>
6882
6883         * testsuite/27_io/filesystem/operations/proximate.cc: Fix typo
6884         in __MINGW32__ macro name.
6885         * testsuite/27_io/filesystem/path/compare/lwg2936.cc: Likewise.
6886         * testsuite/27_io/filesystem/path/generation/proximate.cc:
6887         Likewise.
6888         * testsuite/27_io/filesystem/path/generation/relative.cc:
6889         Likewise.
6890         * testsuite/util/testsuite_fs.h: Likewise.
6891
6892 2021-02-09  François Dumont  <fdumont@gcc.gnu.org>
6893
6894         * include/bits/stl_tree.h
6895         (__has_is_transparent, __has_is_transparent_t): Move...
6896         * include/bits/stl_function.h: ...here.
6897         * include/bits/hashtable_policy.h (_Hash_code_base<>::_M_hash_code_tr): New..
6898         (_Hashtable_base<>::_M_equals_tr): New.
6899         * include/bits/hashtable.h (_Hashtable<>::_M_find_tr, _Hashtable<>::_M_count_tr,
6900         _Hashtable<>::_M_equal_range_tr): New member function templates to perform
6901         heterogeneous lookup.
6902         (_Hashtable<>::_M_find_before_node_tr): New.
6903         (_Hashtable<>::_M_find_node_tr): New.
6904         * include/bits/unordered_map.h (unordered_map::find<>, unordered_map::count<>,
6905         unordered_map::contains<>, unordered_map::equal_range<>): New member function
6906         templates to perform heterogeneous lookup.
6907         (unordered_multimap::find<>, unordered_multimap::count<>,
6908         unordered_multimap::contains<>, unordered_multimap::equal_range<>): Likewise.
6909         * include/bits/unordered_set.h  (unordered_set::find<>, unordered_set::count<>,
6910         unordered_set::contains<>, unordered_set::equal_range<>): Likewise.
6911         (unordered_multiset::find<>, unordered_multiset::count<>,
6912         unordered_multiset::contains<>, unordered_multiset::equal_range<>): Likewise.
6913         * include/debug/unordered_map
6914         (unordered_map::find<>, unordered_map::equal_range<>): Likewise.
6915         (unordered_multimap::find<>, unordered_multimap::equal_range<>): Likewise.
6916         * include/debug/unordered_set
6917         (unordered_set::find<>, unordered_set::equal_range<>): Likewise.
6918         (unordered_multiset::find<>, unordered_multiset::equal_range<>): Likewise.
6919         * testsuite/23_containers/unordered_map/operations/1.cc: New test.
6920         * testsuite/23_containers/unordered_multimap/operations/1.cc: New test.
6921         * testsuite/23_containers/unordered_multiset/operations/1.cc: New test.
6922         * testsuite/23_containers/unordered_set/operations/1.cc: New test.
6923
6924 2021-02-09  François Dumont  <fdumont@gcc.gnu.org>
6925
6926         * include/bits/stl_deque.h
6927         (std::operator-(deque::iterator, deque::iterator)): Replace if/then with
6928         a null pointer test.
6929
6930 2021-02-09  Jonathan Wakely  <jwakely@redhat.com>
6931
6932         * testsuite/27_io/filesystem/operations/remove_all.cc: Remove
6933         test directory after making it writable again.
6934         * testsuite/experimental/filesystem/operations/remove_all.cc:
6935         Likewise.
6936
6937 2021-02-09  Jonathan Wakely  <jwakely@redhat.com>
6938
6939         PR libstdc++/99021
6940         * include/std/coroutine (coroutine_handle<P>::from_address): Add
6941         noexcept.
6942
6943 2021-02-09  Vladimir Vishnevsky  <vv.os.swe@gmail.com>
6944
6945         * include/ext/stdio_sync_filebuf.h: Remove unused <unistd.h>.
6946         * src/c++17/fs_ops.cc (fs::permissions): Qualify mode_t.
6947
6948 2021-02-09  Jakub Jelinek  <jakub@redhat.com>
6949
6950         PR middle-end/98465
6951         * include/bits/basic_string.tcc (basic_string::_M_replace): When __s
6952         points to the characters moved by earlier _S_move, compute the source
6953         address using expression based on the __p pointer rather than __s
6954         pointer.
6955
6956 2021-02-03  Jonathan Wakely  <jwakely@redhat.com>
6957
6958         * testsuite/19_diagnostics/error_code/operators/not_equal.cc:
6959         Add comparison with same category and different values.
6960         * testsuite/19_diagnostics/error_code/operators/less.cc:
6961         Likewise. Fix comparison involving different categories.
6962         * testsuite/19_diagnostics/error_code/operators/three_way.cc:
6963         Likewise.
6964         * testsuite/19_diagnostics/error_condition/operators/less.cc:
6965         Add comment.
6966         * testsuite/19_diagnostics/error_condition/operators/three_way.cc:
6967         Likewise.
6968
6969 2021-02-03  yaozhongxiao  <yaozhongxiao@linux.alibaba.com>
6970
6971         * include/experimental/bits/simd_neon.h: Replace repeated vpadd
6972         calls with a single vaddv for aarch64.
6973
6974 2021-02-03  Matthias Kretz  <kretz@kde.org>
6975
6976         * testsuite/Makefile.am: Warn about the workaround. Add
6977         -fno-tree-vrp to CXXFLAGS passed to the check_simd script.
6978         Improve initial user feedback from make check-simd.
6979         * testsuite/Makefile.in: Regenerated.
6980
6981 2021-02-03  Matthias Kretz  <kretz@kde.org>
6982
6983         * include/experimental/bits/simd.h: Add __detail::_Minimum and
6984         __detail::_Maximum to use them as _BinaryOperation to _S_reduce.
6985         Add hmin and hmax overloads for simd and const_where_expression.
6986         * include/experimental/bits/simd_scalar.h
6987         (_SimdImplScalar::_S_reduce): Make unused _BinaryOperation
6988         parameter const-ref to allow calling _S_reduce with an rvalue.
6989         * testsuite/experimental/simd/tests/reductions.cc: Add tests for
6990         hmin and hmax. Since the compiler statically determined that all
6991         tests pass, repeat the test after a call to make_value_unknown.
6992
6993 2021-02-03  Matthias Kretz  <kretz@kde.org>
6994
6995         * testsuite/experimental/simd/tests/bits/verify.h (verify): Add
6996         instruction pointer data member. Ensure that the `if (m_failed)`
6997         branch is always inlined into the calling code. The body of the
6998         conditional can still be a function call. Move the get_ip call
6999         into the verify ctor to simplify the ctor calls.
7000         (COMPARE): Don't mention the use of all_of for reduction of a
7001         simd_mask. It only distracts from the real issue.
7002
7003 2021-02-03  Matthias Kretz  <kretz@kde.org>
7004
7005         * testsuite/experimental/simd/driver.sh: Abstract reading test
7006         options into read_src_option function. Read skip, only,
7007         expensive, and xfail via read_src_option. Add timeout and
7008         timeout-factor options and adjust timeout variable accordingly.
7009         * testsuite/experimental/simd/tests/loadstore.cc: Set
7010         timeout-factor 2.
7011
7012 2021-02-03  Matthias Kretz  <kretz@kde.org>
7013
7014         * testsuite/experimental/simd/driver.sh: When handling the pipe
7015         to log (and on verbose to stdout) count the lines. If it exceeds
7016         1000 log the issue and exit 125, which is then handled as a
7017         failure.
7018
7019 2021-02-03  Matthias Kretz  <kretz@kde.org>
7020
7021         * testsuite/experimental/simd/tests/hypot3_fma.cc: Add skip:
7022         markup for long double on powerpc64*.
7023
7024 2021-02-03  Matthias Kretz  <kretz@kde.org>
7025
7026         * include/experimental/bits/simd.h: Add __have_power10vec
7027         conditional on _ARCH_PWR10.
7028         * include/experimental/bits/simd_builtin.h: Forward declare
7029         _MaskImplPpc and use it as _MaskImpl when __ALTIVEC__ is
7030         defined.
7031         (_MaskImplBuiltin::_S_some_of): Call _S_popcount from the
7032         _SuperImpl for optimizations and correctness.
7033         * include/experimental/bits/simd_ppc.h: Add _MaskImplPpc.
7034         (_MaskImplPpc::_S_popcount): Implement via vec_cntm for POWER10.
7035         Otherwise, for >=int use -vec_sums divided by a sizeof factor.
7036         For <int use -vec_sums(vec_sum4s(...)) to sum all mask entries.
7037
7038 2021-02-03  Matthias Kretz  <kretz@kde.org>
7039
7040         * testsuite/experimental/simd/driver.sh: Remove executable on
7041         SIGINT. Process compiler and test executable output: In verbose
7042         mode print messages immediately, limited to 1000 lines and
7043         breaking long lines to below $COLUMNS (or 1024 if not set).
7044         Communicating the exit status of the compiler / test with the
7045         necessary pipe is done via a message through stdout/-in.
7046
7047 2021-02-03  Matthias Kretz  <kretz@kde.org>
7048
7049         * testsuite/Makefile.am: Ensure .simd.summary is empty before
7050         collecting a new summary.
7051         * testsuite/Makefile.in: Regenerate.
7052
7053 2021-02-03  Matthias Kretz  <kretz@kde.org>
7054
7055         * testsuite/experimental/simd/generate_makefile.sh: Use
7056         different variables internally than documented for user
7057         overrides. This makes internal append/prepend work as intended.
7058
7059 2021-02-03  Matthias Kretz  <kretz@kde.org>
7060
7061         * testsuite/experimental/simd/driver.sh (verify_test): Print
7062         test output on run xfail. Do not repeat lines from the log that
7063         were already printed on stdout.
7064         (test_selector): Make the compiler flags pattern usable as a
7065         substring selector.
7066         (toplevel): Trap on SIGINT and remove the log and sum files.
7067         Call timout with --foreground to quickly terminate on SIGINT.
7068         * testsuite/experimental/simd/generate_makefile.sh: Simplify run
7069         targets via target patterns. Default DRIVEROPTS to -v for run
7070         targets. Remove log and sum files after completion of the run
7071         target (so that it's always recompiled).
7072         Place help text into text file for reasonable 'make help'
7073         performance.
7074
7075 2021-02-03  Matthias Kretz  <kretz@kde.org>
7076
7077         * include/experimental/bits/simd.h: Remove unnecessary static
7078         assertion. Allow sizeof(8) integer __intrinsic_type to enable
7079         the necessary mask type.
7080
7081 2021-02-03  Matthias Kretz  <kretz@kde.org>
7082
7083         * include/experimental/bits/simd.h: Let __intrinsic_type<long
7084         double, N> be valid if sizeof(long double) == sizeof(double) and
7085         use a __vector double as member type.
7086
7087 2021-02-03  Matthias Kretz  <kretz@kde.org>
7088
7089         * include/experimental/bits/simd.h (__is_intrinsic_type): New
7090         internal type trait. Alias for __is_vector_type on x86.
7091         (_VectorTraitsImpl): Enable for __intrinsic_type in addition for
7092         __vector_type.
7093         (__intrin_bitcast): Allow casting to & from vector & intrinsic
7094         types.
7095         (__intrinsic_type): Explicitly specialize for NEON intrinsic
7096         vector types.
7097
7098 2021-02-03  Matthias Kretz  <kretz@kde.org>
7099
7100         * testsuite/experimental/simd/driver.sh: Implement skip, only,
7101         expensive, and xfail markers. They can select on type, ABI tag
7102         subset number, target-triplet, and compiler flags.
7103         * testsuite/experimental/simd/generate_makefile.sh: The summary
7104         now includes lines for unexpected passes and expected failures.
7105         If the skip or only markers are only conditional on the type, do
7106         not generate rules for those types.
7107         * testsuite/experimental/simd/tests/abs.cc: Mark test expensive
7108         for ABI tag subsets 1-9.
7109         * testsuite/experimental/simd/tests/algorithms.cc: Ditto.
7110         * testsuite/experimental/simd/tests/broadcast.cc: Ditto.
7111         * testsuite/experimental/simd/tests/casts.cc: Ditto.
7112         * testsuite/experimental/simd/tests/generator.cc: Ditto.
7113         * testsuite/experimental/simd/tests/integer_operators.cc: Ditto.
7114         * testsuite/experimental/simd/tests/loadstore.cc: Ditto.
7115         * testsuite/experimental/simd/tests/mask_broadcast.cc: Ditto.
7116         * testsuite/experimental/simd/tests/mask_conversions.cc: Ditto.
7117         * testsuite/experimental/simd/tests/mask_implicit_cvt.cc: Ditto.
7118         * testsuite/experimental/simd/tests/mask_loadstore.cc: Ditto.
7119         * testsuite/experimental/simd/tests/mask_operator_cvt.cc: Ditto.
7120         * testsuite/experimental/simd/tests/mask_operators.cc: Ditto.
7121         * testsuite/experimental/simd/tests/mask_reductions.cc: Ditto.
7122         * testsuite/experimental/simd/tests/operator_cvt.cc: Ditto.
7123         * testsuite/experimental/simd/tests/operators.cc: Ditto.
7124         * testsuite/experimental/simd/tests/reductions.cc: Ditto.
7125         * testsuite/experimental/simd/tests/simd.cc: Ditto.
7126         * testsuite/experimental/simd/tests/split_concat.cc: Ditto.
7127         * testsuite/experimental/simd/tests/splits.cc: Ditto.
7128         * testsuite/experimental/simd/tests/where.cc: Ditto.
7129         * testsuite/experimental/simd/tests/fpclassify.cc: Ditto. In
7130         addition replace "test only floattypes" marker by unconditional
7131         "float|double|ldouble" only marker.
7132         * testsuite/experimental/simd/tests/frexp.cc: Ditto.
7133         * testsuite/experimental/simd/tests/hypot3_fma.cc: Ditto.
7134         * testsuite/experimental/simd/tests/ldexp_scalbn_scalbln_modf.cc:
7135         Ditto.
7136         * testsuite/experimental/simd/tests/logarithm.cc: Ditto.
7137         * testsuite/experimental/simd/tests/math_1arg.cc: Ditto.
7138         * testsuite/experimental/simd/tests/math_2arg.cc: Ditto.
7139         * testsuite/experimental/simd/tests/remqo.cc: Ditto.
7140         * testsuite/experimental/simd/tests/trigonometric.cc: Ditto.
7141         * testsuite/experimental/simd/tests/trunc_ceil_floor.cc: Ditto.
7142         * testsuite/experimental/simd/tests/sincos.cc: Ditto. In
7143         addition, xfail on run because the reference data is missing.
7144
7145 2021-02-02  Jonathan Wakely  <jwakely@redhat.com>
7146
7147         * doc/xml/manual/status_cxx2011.xml: Remove stray table cell.
7148         * doc/xml/manual/status_cxx2014.xml: Likewise.
7149         * doc/xml/manual/status_cxx2017.xml: Likewise.
7150         * doc/html/manual/status.html: Regenerate.
7151
7152 2021-02-01  François Dumont  <fdumont@gcc.gnu.org>
7153
7154         PR libstdc++/70303
7155         * include/bits/stl_deque.h (std::deque<>::operator-(iterator, iterator)):
7156         Return 0 if both iterators are value-initialized.
7157         * testsuite/23_containers/deque/70303.cc: New test.
7158         * testsuite/23_containers/vector/70303.cc: New test.
7159
7160 2021-02-01  Jonathan Wakely  <jwakely@redhat.com>
7161
7162         * doc/xml/manual/status_cxx2011.xml: Update std::call_once
7163         status.
7164         * doc/xml/manual/status_cxx2014.xml: Likewise.
7165         * doc/xml/manual/status_cxx2017.xml: Likewise. Update
7166         std::from_chars and std::to_chars status. Fix formatting.
7167         * doc/html/manual/status.html: Regenerate.
7168
7169 2021-01-28  Jonathan Wakely  <jwakely@redhat.com>
7170
7171         * include/experimental/bits/numeric_traits.h: Update copyright
7172         dates.
7173         * include/experimental/bits/simd.h: Likewise.
7174         * include/experimental/bits/simd_builtin.h: Likewise.
7175         * include/experimental/bits/simd_converter.h: Likewise.
7176         * include/experimental/bits/simd_detail.h: Likewise.
7177         * include/experimental/bits/simd_fixed_size.h: Likewise.
7178         * include/experimental/bits/simd_math.h: Likewise.
7179         * include/experimental/bits/simd_neon.h: Likewise.
7180         * include/experimental/bits/simd_ppc.h: Likewise.
7181         * include/experimental/bits/simd_scalar.h: Likewise.
7182         * include/experimental/bits/simd_x86.h: Likewise.
7183         * include/experimental/bits/simd_x86_conversions.h: Likewise.
7184         * include/experimental/simd: Likewise.
7185         * testsuite/experimental/simd/*: Likewise.
7186
7187 2021-01-27  Jonathan Wakely  <jwakely@redhat.com>
7188
7189         * doc/xml/manual/status_cxx2017.xml: Replace invalid entity.
7190         * doc/html/*: Regenerate.
7191
7192 2021-01-27  Jonathan Wakely  <jwakely@redhat.com>
7193
7194         * testsuite/experimental/simd/generate_makefile.sh: Use printf
7195         instead of echo when printing escape characters.
7196
7197 2021-01-27  Matthias Kretz  <kretz@kde.org>
7198
7199         * scripts/check_simd: New file. This script is called from the
7200         the check-simd target. It determines a set of compiler flags and
7201         simulator setups for calling generate_makefile.sh and passes the
7202         information back to the check-simd target, which recurses to the
7203         generated Makefiles.
7204         * scripts/create_testsuite_files: Remove files below simd/tests/
7205         from testsuite_files and place them in testsuite_files_simd.
7206         * testsuite/Makefile.am: Add testsuite_files_simd. Add
7207         check-simd target.
7208         * testsuite/Makefile.in: Regenerate.
7209         * testsuite/experimental/simd/driver.sh: New file. This script
7210         compiles and runs a given simd test, logging its output and
7211         status. It uses the timeout command to implement compile and
7212         test timeouts.
7213         * testsuite/experimental/simd/generate_makefile.sh: New file.
7214         This script generates a Makefile which uses driver.sh to compile
7215         and run the tests and collect the logs into a single log file.
7216         * testsuite/experimental/simd/tests/abs.cc: New file. Tests
7217         abs(simd).
7218         * testsuite/experimental/simd/tests/algorithms.cc: New file.
7219         Tests min/max(simd, simd).
7220         * testsuite/experimental/simd/tests/bits/conversions.h: New
7221         file. Contains functions to support tests involving conversions.
7222         * testsuite/experimental/simd/tests/bits/make_vec.h: New file.
7223         Support functions make_mask and make_vec.
7224         * testsuite/experimental/simd/tests/bits/mathreference.h: New
7225         file. Support functions to supply precomputed math function
7226         reference data.
7227         * testsuite/experimental/simd/tests/bits/metahelpers.h: New
7228         file. Support code for SFINAE testing.
7229         * testsuite/experimental/simd/tests/bits/simd_view.h: New file.
7230         * testsuite/experimental/simd/tests/bits/test_values.h: New
7231         file. Test functions to easily drive a test with simd objects
7232         initialized from a given list of values and a range of random
7233         values.
7234         * testsuite/experimental/simd/tests/bits/ulp.h: New file.
7235         Support code to determine the ULP distance of simd objects.
7236         * testsuite/experimental/simd/tests/bits/verify.h: New file.
7237         Test framework for COMPARE'ing simd objects and instantiating
7238         the test templates with value_type and ABI tag.
7239         * testsuite/experimental/simd/tests/broadcast.cc: New file. Test
7240         simd broadcasts.
7241         * testsuite/experimental/simd/tests/casts.cc: New file. Test
7242         simd casts.
7243         * testsuite/experimental/simd/tests/fpclassify.cc: New file.
7244         Test floating-point classification functions.
7245         * testsuite/experimental/simd/tests/frexp.cc: New file. Test
7246         frexp(simd).
7247         * testsuite/experimental/simd/tests/generator.cc: New file. Test
7248         simd generator constructor.
7249         * testsuite/experimental/simd/tests/hypot3_fma.cc: New file.
7250         Test 3-arg hypot(simd,simd,simd) and fma(simd,simd,sim).
7251         * testsuite/experimental/simd/tests/integer_operators.cc: New
7252         file. Test integer operators.
7253         * testsuite/experimental/simd/tests/ldexp_scalbn_scalbln_modf.cc:
7254         New file. Test ldexp(simd), scalbn(simd), scalbln(simd), and
7255         modf(simd).
7256         * testsuite/experimental/simd/tests/loadstore.cc: New file. Test
7257         (converting) simd loads and stores.
7258         * testsuite/experimental/simd/tests/logarithm.cc: New file. Test
7259         log*(simd).
7260         * testsuite/experimental/simd/tests/mask_broadcast.cc: New file.
7261         Test simd_mask broadcasts.
7262         * testsuite/experimental/simd/tests/mask_conversions.cc: New
7263         file. Test simd_mask conversions.
7264         * testsuite/experimental/simd/tests/mask_implicit_cvt.cc: New
7265         file. Test simd_mask implicit conversions.
7266         * testsuite/experimental/simd/tests/mask_loadstore.cc: New file.
7267         Test simd_mask loads and stores.
7268         * testsuite/experimental/simd/tests/mask_operator_cvt.cc: New
7269         file. Test simd_mask operators convert as specified.
7270         * testsuite/experimental/simd/tests/mask_operators.cc: New file.
7271         Test simd_mask compares, subscripts, and negation.
7272         * testsuite/experimental/simd/tests/mask_reductions.cc: New
7273         file. Test simd_mask reductions.
7274         * testsuite/experimental/simd/tests/math_1arg.cc: New file. Test
7275         1-arg math functions on simd.
7276         * testsuite/experimental/simd/tests/math_2arg.cc: New file. Test
7277         2-arg math functions on simd.
7278         * testsuite/experimental/simd/tests/operator_cvt.cc: New file.
7279         Test implicit conversions on simd binary operators behave as
7280         specified.
7281         * testsuite/experimental/simd/tests/operators.cc: New file. Test
7282         simd compares, subscripts, not, unary minus, plus, minus,
7283         multiplies, divides, increment, and decrement.
7284         * testsuite/experimental/simd/tests/reductions.cc: New file.
7285         Test reduce(simd).
7286         * testsuite/experimental/simd/tests/remqo.cc: New file. Test
7287         remqo(simd).
7288         * testsuite/experimental/simd/tests/simd.cc: New file. Basic
7289         sanity checks of simd types.
7290         * testsuite/experimental/simd/tests/sincos.cc: New file. Test
7291         sin(simd) and cos(simd).
7292         * testsuite/experimental/simd/tests/split_concat.cc: New file.
7293         Test split(simd) and concat(simd, simd).
7294         * testsuite/experimental/simd/tests/splits.cc: New file. Test
7295         split(simd_mask).
7296         * testsuite/experimental/simd/tests/trigonometric.cc: New file.
7297         Test remaining trigonometric functions on simd.
7298         * testsuite/experimental/simd/tests/trunc_ceil_floor.cc: New
7299         file. Test trunc(simd), ceil(simd), and floor(simd).
7300         * testsuite/experimental/simd/tests/where.cc: New file. Test
7301         masked operations using where.
7302
7303 2021-01-27  Matthias Kretz  <kretz@kde.org>
7304
7305         * doc/xml/manual/status_cxx2017.xml: Add implementation status
7306         of the Parallelism TS 2. Document implementation-defined types
7307         and behavior.
7308         * include/Makefile.am: Add new headers.
7309         * include/Makefile.in: Regenerate.
7310         * include/experimental/simd: New file. New header for
7311         Parallelism TS 2.
7312         * include/experimental/bits/numeric_traits.h: New file.
7313         Implementation of P1841R1 using internal naming. Addition of
7314         missing IEC559 functionality query.
7315         * include/experimental/bits/simd.h: New file. Definition of the
7316         public simd interfaces and general implementation helpers.
7317         * include/experimental/bits/simd_builtin.h: New file.
7318         Implementation of the _VecBuiltin simd_abi.
7319         * include/experimental/bits/simd_converter.h: New file. Generic
7320         simd conversions.
7321         * include/experimental/bits/simd_detail.h: New file. Internal
7322         macros for the simd implementation.
7323         * include/experimental/bits/simd_fixed_size.h: New file. Simd
7324         fixed_size ABI specific implementations.
7325         * include/experimental/bits/simd_math.h: New file. Math
7326         overloads for simd.
7327         * include/experimental/bits/simd_neon.h: New file. Simd NEON
7328         specific implementations.
7329         * include/experimental/bits/simd_ppc.h: New file. Implement bit
7330         shifts to avoid invalid results for integral types smaller than
7331         int.
7332         * include/experimental/bits/simd_scalar.h: New file. Simd scalar
7333         ABI specific implementations.
7334         * include/experimental/bits/simd_x86.h: New file. Simd x86
7335         specific implementations.
7336         * include/experimental/bits/simd_x86_conversions.h: New file.
7337         x86 specific conversion optimizations. The conversion patterns
7338         work around missing conversion patterns in the compiler and
7339         should be removed as soon as PR85048 is resolved.
7340         * testsuite/experimental/simd/standard_abi_usable.cc: New file.
7341         Test that all (not all fixed_size<N>, though) standard simd and
7342         simd_mask types are usable.
7343         * testsuite/experimental/simd/standard_abi_usable_2.cc: New
7344         file. As above but with -ffast-math.
7345         * testsuite/libstdc++-dg/conformance.exp: Don't build simd tests
7346         from the standard test loop. Instead use
7347         check_vect_support_and_set_flags to build simd tests with the
7348         relevant machine flags.
7349
7350 2021-01-27  Jonathan Wakely  <jwakely@redhat.com>
7351
7352         PR libstdc++/66414
7353         * include/bits/string_view.tcc
7354         (basic_string_view::find(const CharT*, size_type, size_type)):
7355         Optimize.
7356
7357 2021-01-27  Paul Fee  <paul.f.fee@gmail.com>
7358
7359         * include/bits/basic_string.h (basic_string::contains): New
7360         member functions.
7361         * include/std/string_view (basic_string_view::contains):
7362         Likewise.
7363         * include/std/version (__cpp_lib_string_contains): Define.
7364         * testsuite/21_strings/basic_string/operations/starts_with/char/1.cc:
7365         Remove trailing whitespace.
7366         * testsuite/21_strings/basic_string/operations/starts_with/wchar_t/1.cc:
7367         Likewise.
7368         * testsuite/21_strings/basic_string/operations/contains/char/1.cc: New test.
7369         * testsuite/21_strings/basic_string/operations/contains/wchar_t/1.cc: New test.
7370         * testsuite/21_strings/basic_string_view/operations/contains/char/1.cc: New test.
7371         * testsuite/21_strings/basic_string_view/operations/contains/char/2.cc: New test.
7372         * testsuite/21_strings/basic_string_view/operations/contains/wchar_t/1.cc: New test.
7373
7374 2021-01-21  Jonathan Wakely  <jwakely@redhat.com>
7375
7376         * src/c++17/Makefile.in: Regenerate.
7377
7378 2021-01-20  David Edelsohn  <dje.gcc@gmail.com>
7379
7380         * config/os/aix/ctype_inline.h (bool ctype<char>:: is): Cast
7381         _OBJ_DATA subscript to unsigned char. Add _THREAD_SAFE access to
7382         __lc_type.
7383         (const char* ctype<char>:: is): Same.
7384
7385 2021-01-18  Jonathan Wakely  <jwakely@redhat.com>
7386
7387         PR libstdc++/98725
7388         * testsuite/20_util/unique_ptr/io/lwg2948.cc:  Do not try to
7389         write to a wide character stream if wide character support is
7390         disabled in the library.
7391
7392 2021-01-18  Jonathan Wakely  <jwakely@redhat.com>
7393
7394         * testsuite/27_io/basic_stringstream/cons/char/1.cc: Use
7395         stringbuf not wstringbuf.
7396
7397 2021-01-18  Jakub Jelinek  <jakub@redhat.com>
7398
7399         PR debug/98708
7400         * src/c++11/Makefile.am (cxx11-ios_failure-lt.s, cxx11-ios_failure.s):
7401         Compile with -gno-as-loc-support.
7402         * src/c++11/Makefile.in: Regenerated.
7403
7404 2021-01-16  H.J. Lu  <hjl.tools@gmail.com>
7405
7406         * testsuite/29_atomics/atomic_flag/test_and_set/explicit-hle.cc:
7407         Add -fcf-protection=none to -march=i486.
7408
7409 2021-01-14  François Dumont  <fdumont@gcc.gnu.org>
7410
7411         * testsuite/23_containers/deque/debug/98466.cc: Make it pre-C++11
7412         compliant.
7413
7414 2021-01-14  Alexandre Oliva  <oliva@adacore.com>
7415
7416         * testsuite/30_threads/future/members/poll.cc: Calibrate
7417         iteration count.
7418
7419 2021-01-14  François Dumont  <fdumont@gcc.gnu.org>
7420
7421         PR libstdc++/98466
7422         * include/bits/hashtable_policy.h (_Node_iterator_base()): Set _M_cur to nullptr.
7423         (_Node_iterator()): Make default.
7424         (_Node_const_iterator()): Make default.
7425         * include/debug/macros.h (__glibcxx_check_erae_range_after): Add _M_singular
7426         iterator checks.
7427         * include/debug/safe_iterator.h
7428         (_GLIBCXX_DEBUG_VERIFY_OPERANDS): Accept if both iterator are value initialized.
7429         * include/debug/safe_local_iterator.h (_GLIBCXX_DEBUG_VERIFY_OPERANDS):
7430         Likewise.
7431         * include/debug/safe_iterator.tcc (_Safe_iterator<>::_M_valid_range): Add
7432         _M_singular checks on input iterators.
7433         * src/c++11/debug.cc (_Safe_iterator_base::_M_can_compare): Remove _M_singular
7434         checks.
7435         * testsuite/23_containers/deque/debug/98466.cc: New test.
7436         * testsuite/23_containers/unordered_map/debug/98466.cc: New test.
7437
7438 2021-01-14  Jonathan Wakely  <jwakely@redhat.com>
7439
7440         PR libstdc++/98471
7441         * include/bits/fs_path.h (__throw_conversion_error): New
7442         function to throw or abort on character conversion errors.
7443         (__wstr_from_utf8): Move definition after filesystem_error has
7444         been defined. Use __throw_conversion_error.
7445         (path::_S_convert<_EcharT>): Use __throw_conversion_error.
7446         (path::_S_str_convert<_CharT, _Traits, _Allocator>): Likewise.
7447         (path::u8string): Likewise.
7448
7449 2021-01-14  Jonathan Wakely  <jwakely@redhat.com>
7450
7451         * include/std/barrier: Update copyright years. Fix whitespace.
7452         * include/std/version: Fix whitespace.
7453         * testsuite/30_threads/barrier/1.cc: Update copyright years.
7454         * testsuite/30_threads/barrier/2.cc: Likewise.
7455         * testsuite/30_threads/barrier/arrive.cc: Likewise.
7456         * testsuite/30_threads/barrier/arrive_and_drop.cc: Likewise.
7457         * testsuite/30_threads/barrier/arrive_and_wait.cc: Likewise.
7458         * testsuite/30_threads/barrier/completion.cc: Likewise.
7459
7460 2021-01-13  Jonathan Wakely  <jwakely@redhat.com>
7461
7462         * doc/doxygen/user.cfg.in (INPUT): Remove include/debug/array.
7463
7464 2021-01-10  David Edelsohn  <dje.gcc@gmail.com>
7465
7466         PR libstdc++/98613
7467         * testsuite/ext/vstring/cons/moveable.cc: Suppress false positive
7468         warning.
7469         * testsuite/ext/vstring/modifiers/assign/move_assign.cc: Same.
7470
7471 2021-01-08  Olivier Hainque  <hainque@adacore.com>
7472
7473         * testsuite/20_util/bind/ref_neg.cc: Tweak the
7474         dg-prune-output regex for out-of-build-tree contexts.
7475
7476 2021-01-07  Thomas Rodgers  <trodgers@redhat.com>
7477
7478         * doc/doxygen/user.cfg.in: Add new header.
7479         * include/Makefile.am (std_headers): likewise.
7480         * include/Makefile.in: Regenerate.
7481         * include/precompiled/stdc++.h: Add new header.
7482         * include/std/barrier: New file.
7483         * include/std/version: Add __cpp_lib_barrier feature test macro.
7484         * testsuite/30_threads/barrier/1.cc: New test.
7485         * testsuite/30_threads/barrier/2.cc: Likewise.
7486         * testsuite/30_threads/barrier/arrive_and_drop.cc: Likewise.
7487         * testsuite/30_threads/barrier/arrive_and_wait.cc: Likewise.
7488         * testsuite/30_threads/barrier/arrive.cc: Likewise.
7489         * testsuite/30_threads/barrier/completion.cc: Likewise.
7490
7491 2021-01-07  Patrick Palka  <ppalka@redhat.com>
7492
7493         PR libstdc++/98384
7494         * testsuite/20_util/to_chars/long_double.cc: Use nexttowardl
7495         instead of the non-standard nextupl and nextdownl.
7496
7497 2021-01-05  Samuel Thibault  <samuel.thibault@ens-lyon.org>
7498
7499         * configure: Re-generate.
7500
7501 2021-01-05  Ed Smith-Rowland  <3dw4rd@verizon.net>
7502
7503         * include/precompiled/stdc++.h: Add <source_location> to C++20 section.
7504
7505 2021-01-01  Jakub Jelinek  <jakub@redhat.com>
7506
7507         * ChangeLog-2020: Rotate ChangeLog.  New file.
7508
7509 \f
7510 Copyright (C) 2021 Free Software Foundation, Inc.
7511
7512 Copying and distribution of this file, with or without modification,
7513 are permitted in any medium without royalty provided the copyright
7514 notice and this notice are preserved.