libstdc++-v3/ChangeLog

   1 2021-10-20  Jonathan Wakely  <jwakely@redhat.com>
   2
   3         * testsuite/20_util/optional/monadic/transform.cc: Check that
   4         an rvalue result is not materialized too soon.
   5
   6 2021-10-19  Patrick Palka  <ppalka@redhat.com>
   7
   8         * include/std/ranges (iota_view::_Iterator::operator+): Adjust
   9         definition as per LWG 3580.
  10         (iota_view::_Iterator::operator-): Likewise.
  11
  12 2021-10-19  Patrick Palka  <ppalka@redhat.com>
  13
  14         * include/std/ranges (basic_istream_view::_M_object): Value
  15         initialize as per LWG 3568.
  16
  17 2021-10-19  Patrick Palka  <ppalka@redhat.com>
  18
  19         * include/bits/ranges_util.h
  20         (__detail::__uses_nonqualification_pointer_conversion): Define
  21         and use it ...
  22         (__detail::__convertible_to_nonslicing): ... here, as per LWG 3470.
  23         * testsuite/std/ranges/subrange/1.cc: New test.
  24
  25 2021-10-19  Patrick Palka  <ppalka@redhat.com>
  26
  27         * include/std/ranges (iota_view::_Iterator): Befriend iota_view.
  28         (iota_view::_Sentinel): Likewise.
  29         (iota_view::iota_view): Add three overloads, each taking an
  30         iterator/sentinel pair as per LWG 3523.
  31         * testsuite/std/ranges/iota/iota_view.cc (test06): New test.
  32
  33 2021-10-19  Patrick Palka  <ppalka@redhat.com>
  34
  35         * include/bits/ranges_base.h (view_interface): Forward declare.
  36         (__detail::__is_derived_from_view_interface_fn): Declare.
  37         (__detail::__is_derived_from_view_interface): Define as per LWG 3549.
  38         (enable_view): Adjust as per LWG 3549.
  39         * include/bits/ranges_util.h (view_interface): Don't derive from
  40         view_base.
  41         * include/std/ranges (filter_view): Revert r11-3504 change.
  42         (transform_view): Likewise.
  43         (take_view): Likewise.
  44         (take_while_view): Likewise.
  45         (drop_view): Likewise.
  46         (drop_while_view): Likewise.
  47         (join_view): Likewise.
  48         (lazy_split_view): Likewise.
  49         (split_view): Likewise.
  50         (reverse_view): Likewise.
  51         * testsuite/std/ranges/adaptors/sizeof.cc: Update expected sizes.
  52         * testsuite/std/ranges/view.cc (test_view::test_view): Remove
  53         this default ctor since views no longer need to be default initable.
  54         (test01): New test.
  55
  56 2021-10-19  Jonathan Wakely  <jwakely@redhat.com>
  57
  58         * src/c++11/random.cc (which_source): New helper function.
  59         (random_device::_M_getentropy()): Use which_source and return
  60         suitable values for sources other than device files.
  61         * testsuite/26_numerics/random/random_device/entropy.cc: New test.
  62
  63 2021-10-19  Jonathan Wakely  <jwakely@redhat.com>
  64
  65         * doc/Makefile.am (stamp-html-doxygen, stamp-html-doxygen)
  66         (stamp-latex-doxygen, stamp-man-doxygen): Fix recipes for
  67         relative ${top_srcdir}.
  68         * doc/Makefile.in: Regenerate.
  69
  70 2021-10-19  Jonathan Wakely  <jwakely@redhat.com>
  71
  72         * include/std/variant (_Uninitialized): Use an empty struct
  73         for the unused union member, instead of char.
  74
  75 2021-10-19  Jonathan Wakely  <jwakely@redhat.com>
  76
  77         * include/bits/stl_stack.h (stack(Iterator, Iterator)): Remove
  78         non-deducible template parameter from deduction guide.
  79         * testsuite/23_containers/stack/deduction.cc: Check new C++23
  80         deduction guides.
  81
  82 2021-10-19  Jonathan Wakely  <jwakely@redhat.com>
  83
  84         * include/std/optional (_Optional_payload_base::_Storage): Add
  85         constructor taking a callable function to invoke.
  86         (_Optional_payload_base::_M_apply): New function.
  87         (__cpp_lib_monadic_optional): Define for C++23.
  88         (optional::and_then, optional::transform, optional::or_else):
  89         Define for C++23.
  90         * include/std/ranges (__detail::__cached): Remove.
  91         (__detail::__non_propagating_cache): Remove use of __cached for
  92         contained value. Use _Optional_payload_base::_M_construct and
  93         _Optional_payload_base::_M_apply to set the contained value.
  94         * include/std/version (__cpp_lib_monadic_optional): Define.
  95         * testsuite/20_util/optional/monadic/and_then.cc: New test.
  96         * testsuite/20_util/optional/monadic/or_else.cc: New test.
  97         * testsuite/20_util/optional/monadic/or_else_neg.cc: New test.
  98         * testsuite/20_util/optional/monadic/transform.cc: New test.
  99         * testsuite/20_util/optional/monadic/version.cc: New test.
 100
 101 2021-10-19  Jonathan Wakely  <jwakely@redhat.com>
 102
 103         PR libstdc++/102825
 104         * include/bits/mofunc_impl.h (move_only_function): Remove
 105         invalid base initializer.
 106         * testsuite/20_util/move_only_function/cons.cc: Instantiate
 107         constructors to check bodies.
 108
 109 2021-10-15  Jonathan Wakely  <jwakely@redhat.com>
 110
 111         * include/bits/fs_path.h (path::_S_convert(T)): Avoid recursive
 112         call to function with deduced return type.
 113
 114 2021-10-15  Jonathan Wakely  <jwakely@redhat.com>
 115
 116         * include/bits/basic_string.h (__cpp_lib_string_resize_and_overwrite):
 117         Define for C++23.
 118         (basic_string::resize_and_overwrite): Declare.
 119         * include/bits/basic_string.tcc (basic_string::resize_and_overwrite):
 120         Define.
 121         * include/std/version (__cpp_lib_resize_and_overwrite): Define
 122         for C++23.
 123         * testsuite/21_strings/basic_string/capacity/char/resize_and_overwrite.cc:
 124         New test.
 125
 126 2021-10-15  Jonathan Wakely  <jwakely@redhat.com>
 127
 128         PR libstdc++/101263
 129         * include/std/ranges (__cached): New wrapper struct.
 130         (__non_propagating_cache): Use __cached for contained value.
 131         (__non_propagating_cache::_M_emplace_deref): Add constexpr. Use
 132         std::construct_at instead of placement new.
 133         * testsuite/std/ranges/adaptors/join.cc: Check constexpr works.
 134
 135 2021-10-15  Jonathan Wakely  <jwakely@redhat.com>
 136
 137         * include/std/variant (__cpp_lib_variant): Update value for
 138         C++20.
 139         (__variant_cast, __variant_construct): Add constexpr for C++20.
 140         (__variant_construct_single, __construct_by_index) Likewise. Use
 141         std::_Construct instead of placement new.
 142         (_Uninitialized<T, false>) [__cplusplus >= 202002]: Replace
 143         buffer with a union and define a destructor.
 144         (_Variadic_union) [__cplusplus >= 202002]: Add a specialization
 145         for non-trivial destruction.
 146         (_Variant_storage::__index_of): New helper variable template.
 147         (_Variant_storage::~_Variant_storage()): Add constexpr.
 148         (_Variant_storage::_M_reset()): Likewise.
 149         (_Copy_ctor_base, _Move_ctor_base): Likewise.
 150         (_Copy_assign_base, _Move_assign_base): Likewise.
 151         (variant, swap): Likewise.
 152         * include/std/version (__cpp_lib_variant): Update value for
 153         C++20.
 154         * testsuite/20_util/optional/version.cc: Check for exact value
 155         in C++17.
 156         * testsuite/20_util/variant/87619.cc: Increase timeout for
 157         C++20 mode.
 158         * testsuite/20_util/variant/constexpr.cc: New test.
 159         * testsuite/20_util/variant/version.cc: New test.
 160
 161 2021-10-15  Jonathan Wakely  <jwakely@redhat.com>
 162
 163         * include/std/variant (__detail::__variant::__get_storage):
 164         Remove unused function.
 165         (__variant_construct_by_index): Set index after construction is
 166         complete. Rename to ...
 167         (__detail::__variant::__construct_by_index): ... this.
 168         (variant): Use new name for __variant_construct_by_index friend
 169         declaration. Remove __get_storage friend declaration.
 170         (variant::emplace): Use new name and remove try-blocks.
 171
 172 2021-10-15  Jonathan Wakely  <jwakely@redhat.com>
 173
 174         * include/std/variant (_Variant_storage::_M_storage()): Remove.
 175         (__detail::__variant::__get_storage): Remove.
 176         (variant): Remove friend declaration of __get_storage.
 177
 178 2021-10-15  Jason Merrill  <jason@redhat.com>
 179
 180         * testsuite/20_util/integer_comparisons/greater_equal_neg.cc:
 181         * testsuite/20_util/integer_comparisons/greater_neg.cc:
 182         * testsuite/20_util/integer_comparisons/less_equal_neg.cc:
 183         Adjust expected message.
 184         * testsuite/lib/prune.exp: Prune 'in constexpr expansion'.
 185
 186 2021-10-14  Jonathan Wakely  <jwakely@redhat.com>
 187
 188         * include/std/variant (__variant::__get(in_place_index_t<N>, U&&)):
 189         Rename to __get_n and remove first argument. Replace pair of
 190         overloads with a single function using 'if constexpr'.
 191         (__variant::__get(Variant&&)): Adjust to use __get_n.
 192
 193 2021-10-14  Jonathan Wakely  <jwakely@redhat.com>
 194
 195         * include/bits/fs_path.h (path(path&&)): Make unconditionally
 196         noexcept.
 197         (path::_S_convert(T)): Add condtional noexcept.
 198
 199 2021-10-14  Jonathan Wakely  <jwakely@redhat.com>
 200
 201         PR libstdc++/102743
 202         * include/bits/fs_path.h (path::_S_convert(T)): Fix condition
 203         for returning the same string unchanged.
 204
 205 2021-10-14  Jonathan Wakely  <jwakely@redhat.com>
 206
 207         * include/bits/regex.h: Check __cpp_inline_variables instead of
 208         __cplusplus.
 209
 210 2021-10-14  Jonathan Wakely  <jwakely@redhat.com>
 211
 212         * testsuite/20_util/is_layout_compatible/version.cc: Check
 213         correct macro.
 214
 215 2021-10-14  Jonathan Wakely  <jwakely@redhat.com>
 216
 217         * include/bits/stl_construct.h (_Construct): Use
 218         std::construct_at when constant evaluated.
 219         * include/std/optional (_Storage, _Optional_payload, optional):
 220         Add constexpr as specified by P2231R1.
 221         * include/std/version (__cpp_lib_optional): Update value for
 222         C++20.
 223         * testsuite/20_util/optional/requirements.cc: Check feature test
 224         macro.
 225         * testsuite/20_util/optional/constexpr/assign.cc: New test.
 226         * testsuite/20_util/optional/constexpr/cons/conv.cc: New test.
 227         * testsuite/20_util/optional/constexpr/modifiers.cc: New test.
 228         * testsuite/20_util/optional/constexpr/swap.cc: New test.
 229         * testsuite/20_util/optional/version.cc: New test.
 230
 231 2021-10-13  Jonathan Wakely  <jwakely@redhat.com>
 232
 233         * include/bits/fs_path.h (__detail::__is_contiguous): Add
 234         partial specializations for pointers and __normal_iterator.
 235
 236 2021-10-13  Jonathan Wakely  <jwakely@redhat.com>
 237
 238         * testsuite/27_io/filesystem/path/construct/102592.C: Moved to...
 239         * testsuite/27_io/filesystem/path/construct/102592.cc: ...here.
 240         * testsuite/28_regex/match_results/102667.C: Moved to...
 241         * testsuite/28_regex/match_results/102667.cc: ...here.
 242
 243 2021-10-13  Jonathan Wakely  <jwakely@redhat.com>
 244
 245         * include/bits/fs_path.h (__detail::__is_contiguous): New
 246         variable template to identify contiguous iterators.
 247         (__detail::__unified_char8_t): New alias template to decide when
 248         to treat char8_t as char without encoding conversion.
 249         (__detail::__effective_range(const basic_string<C,T>&)): Use
 250         std::char_traits<C> for returned string view.
 251         (__detail::__effective_range(const basic_string_view<C,T>&)):
 252         Likewise.
 253         (__detail::__effective_range(const Source&)): Use
 254         __is_contiguous to detect mode cases of contiguous iterators.
 255         Use __unified_char8_t to return a std::string instead of
 256         std::u8string.
 257
 258 2021-10-13  Jonathan Wakely  <jwakely@redhat.com>
 259
 260         PR libstdc++/102592
 261         * include/bits/fs_path.h (path::path(Iter, Iter, format))
 262         (path::append(Iter, Iter), path::concat(Iter, Iter)): Call
 263         __string_from_range directly, instead of two-argument overload
 264         of _S_convert.
 265         (path::_S_convert(Iter, Iter)): Remove.
 266         * testsuite/27_io/filesystem/path/construct/102592.C: New test.
 267
 268 2021-10-13  Jonathan Wakely  <jwakely@redhat.com>
 269
 270         * include/bits/c++config (__terminate): Add extern "C++".
 271
 272 2021-10-12  Jonathan Wakely  <jwakely@redhat.com>
 273
 274         * testsuite/20_util/tuple/comparison_operators/overloaded.cc:
 275         Restore test for operator<.
 276         * testsuite/20_util/tuple/comparison_operators/overloaded2.cc:
 277         Adjust expected errors for C++20.
 278
 279 2021-10-12  Jonathan Wakely  <jwakely@redhat.com>
 280
 281         PR libstdc++/101960
 282         * include/std/tuple (_Tuple_impl(_Tuple_impl&&)): Define as
 283         defauled.
 284         * testsuite/20_util/tuple/cons/101960.cc: Check tuples with
 285         array elements before the last element.
 286
 287 2021-10-12  Jonathan Wakely  <jwakely@redhat.com>
 288
 289         * include/bits/stl_iterator_base_funcs.h (__advance): Add
 290         deleted overload to improve diagnostics.
 291         (__distance): Likewise.
 292
 293 2021-10-11  Jonathan Wakely  <jwakely@redhat.com>
 294
 295         * include/bits/atomic_timed_wait.h: Remove unused header.
 296         * include/bits/c++config (std:__terminate): Define.
 297         * include/bits/semaphore_base.h: Remove <exception> and use
 298         __terminate instead of terminate.
 299         * include/bits/std_thread.h: Likewise.
 300         * libsupc++/eh_terminate.cc (std::terminate): Use qualified-id
 301         to call __cxxabiv1::__terminate.
 302
 303 2021-10-11  Jonathan Wakely  <jwakely@redhat.com>
 304
 305         * include/bits/regex.h (basic_regex::assign(Iter, Iter)): Avoid
 306         std::__to_address by using poitner directly or using base()
 307         member of __normal_iterator.
 308
 309 2021-10-11  Jonathan Wakely  <jwakely@redhat.com>
 310
 311         * testsuite/18_support/numeric_limits/lowest.cc: Use
 312         numeric_limits<T>::is_integer instead of is_integral<T>::value.
 313
 314 2021-10-11  Jonathan Wakely  <jwakely@redhat.com>
 315
 316         PR libstdc++/89927
 317         * include/bits/regex.h (basic_regex(const _Ch_type*, size_t)):
 318         Add __glibcxx_requires_string_len assertion.
 319         (basic_regex::assign(InputIterator, InputIterator)): Add
 320         __glibcxx_requires_valid_range assertion.
 321         * include/bits/regex_scanner.tcc (_Scanner::_M_advance())
 322         (_Scanner::_M_scan_normal()): Use string literal in assertions.
 323
 324 2021-10-11  Jonathan Wakely  <jwakely@redhat.com>
 325
 326         PR libstdc++/102667
 327         * include/bits/regex.h (match_result::empty()): Optimize by
 328         calling the base function directly.
 329         (match_results::end()): Check _Base_type::empty() not empty().
 330         * testsuite/28_regex/match_results/102667.C: New test.
 331
 332 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
 333
 334         PR libstdc++/98725
 335         * testsuite/18_support/numeric_limits/lowest.cc: Remove use of
 336         _GLIBCXX_USE_WCHAR_T.
 337         * testsuite/18_support/numeric_limits/min_max.cc: Replace use of
 338         _GLIBCXX_USE_WCHAR_T with checks for WCHAR_MIN and WCHAR_MAX.
 339         * testsuite/20_util/from_chars/1_neg.cc: Remove use of
 340         _GLIBCXX_USE_WCHAR_T.
 341         * testsuite/20_util/function_objects/searchers.cc: Likewise. Use
 342         char_traits<wchar_t>::length instead of wcslen.
 343         * testsuite/20_util/hash/requirements/explicit_instantiation.cc:
 344         Likewise.
 345         * testsuite/20_util/is_arithmetic/value.cc: Likewise.
 346         * testsuite/20_util/is_compound/value.cc: Likewise.
 347         * testsuite/20_util/is_floating_point/value.cc: Likewise.
 348         * testsuite/20_util/is_fundamental/value.cc: Likewise.
 349         * testsuite/20_util/is_integral/value.cc: Likewise.
 350         * testsuite/20_util/is_signed/value.cc: Likewise.
 351         * testsuite/20_util/is_unsigned/value.cc: Likewise.
 352         * testsuite/20_util/is_void/value.cc: Likewise.
 353         * testsuite/20_util/make_signed/requirements/typedefs-1.cc:
 354         Likewise.
 355         * testsuite/20_util/make_signed/requirements/typedefs-2.cc:
 356         Likewise.
 357         * testsuite/20_util/make_signed/requirements/typedefs-3.cc:
 358         Likewise.
 359         * testsuite/20_util/make_signed/requirements/typedefs-4.cc:
 360         Likewise.
 361         * testsuite/20_util/make_unsigned/requirements/typedefs-1.cc:
 362         Likewise.
 363         * testsuite/20_util/make_unsigned/requirements/typedefs-2.cc:
 364         Likewise.
 365         * testsuite/20_util/make_unsigned/requirements/typedefs-3.cc:
 366         Likewise.
 367         * testsuite/20_util/to_chars/3.cc: Likewise.
 368         * testsuite/20_util/type_identity/requirements/typedefs.cc:
 369         Likewise.
 370         * testsuite/21_strings/basic_string/hash/debug.cc: Likewise.
 371         * testsuite/21_strings/basic_string/hash/hash.cc: Likewise.
 372         * testsuite/21_strings/basic_string/literals/types-char8_t.cc:
 373         Likewise.
 374         * testsuite/21_strings/basic_string/literals/types.cc: Likewise.
 375         * testsuite/21_strings/basic_string/literals/values-char8_t.cc:
 376         Likewise.
 377         * testsuite/21_strings/basic_string/literals/values.cc:
 378         Likewise.
 379         * testsuite/21_strings/basic_string/modifiers/64422.cc:
 380         Likewise.
 381         * testsuite/21_strings/basic_string/range_access/wchar_t/1.cc:
 382         Likewise.
 383         * testsuite/21_strings/basic_string/requirements/citerators.cc:
 384         Likewise.
 385         * testsuite/21_strings/basic_string/requirements/typedefs.cc:
 386         Likewise.
 387         * testsuite/21_strings/basic_string/types/pmr_typedefs.cc:
 388         Likewise.
 389         * testsuite/21_strings/basic_string_view/literals/types-char8_t.cc:
 390         Likewise.
 391         * testsuite/21_strings/basic_string_view/literals/types.cc:
 392         Likewise.
 393         * testsuite/21_strings/basic_string_view/literals/values-char8_t.cc:
 394         Likewise.
 395         * testsuite/21_strings/basic_string_view/literals/values.cc:
 396         Likewise.
 397         * testsuite/21_strings/basic_string_view/requirements/typedefs.cc:
 398         Likewise.
 399         * testsuite/21_strings/basic_string_view/typedefs.cc: Likewise.
 400         * testsuite/21_strings/char_traits/requirements/constexpr_functions.cc:
 401         Likewise.
 402         * testsuite/21_strings/char_traits/requirements/constexpr_functions_c++17.cc:
 403         Likewise.
 404         * testsuite/21_strings/char_traits/requirements/constexpr_functions_c++20.cc:
 405         Likewise.
 406         * testsuite/22_locale/ctype/is/string/89728_neg.cc: Likewise.
 407         * testsuite/25_algorithms/fill/4.cc: Likewise.
 408         * testsuite/25_algorithms/fill_n/1.cc: Likewise.
 409         * testsuite/experimental/functional/searchers.cc: Likewise. Use
 410         char_traits<wchar_t>::length instead of wcslen.
 411         * testsuite/experimental/polymorphic_allocator/pmr_typedefs_string.cc:
 412         Likewise.
 413         * testsuite/experimental/string_view/literals/types-char8_t.cc:
 414         Likewise.
 415         * testsuite/experimental/string_view/literals/types.cc:
 416         Likewise.
 417         * testsuite/experimental/string_view/literals/values-char8_t.cc:
 418         Likewise.
 419         * testsuite/experimental/string_view/literals/values.cc:
 420         Likewise.
 421         * testsuite/experimental/string_view/range_access/wchar_t/1.cc:
 422         Likewise.
 423         * testsuite/experimental/string_view/requirements/typedefs.cc:
 424         Likewise.
 425         * testsuite/experimental/string_view/typedefs.cc: Likewise.
 426         * testsuite/ext/vstring/range_access.cc: Likewise.
 427         * testsuite/std/concepts/concepts.lang/concept.arithmetic/integral.cc:
 428         Likewise.
 429         * testsuite/std/concepts/concepts.lang/concept.arithmetic/signed_integral.cc:
 430         Likewise.
 431         * testsuite/std/concepts/concepts.lang/concept.arithmetic/unsigned_integral.cc:
 432         Likewise.
 433         * testsuite/tr1/4_metaprogramming/is_arithmetic/value.cc:
 434         Likewise.
 435         * testsuite/tr1/4_metaprogramming/is_compound/value.cc:
 436         Likewise.
 437         * testsuite/tr1/4_metaprogramming/is_floating_point/value.cc:
 438         Likewise.
 439         * testsuite/tr1/4_metaprogramming/is_fundamental/value.cc:
 440         Likewise.
 441         * testsuite/tr1/4_metaprogramming/is_integral/value.cc:
 442         Likewise.
 443         * testsuite/tr1/4_metaprogramming/is_signed/value.cc: Likewise.
 444         * testsuite/tr1/4_metaprogramming/is_unsigned/value.cc:
 445         Likewise.
 446         * testsuite/tr1/4_metaprogramming/is_void/value.cc: Likewise.
 447         * testsuite/tr1/6_containers/hash/24799.cc: Likewise.
 448
 449 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
 450
 451         PR libstdc++/98725
 452         * include/std/ostream (operator<<(basic_ostream<char, Tr>&, wchar_t))
 453         (operator<<(basic_ostream<char, Tr>&, const wchar_t*)): Always
 454         define as deleted. Do not check _GLIBCXX_USE_WCHAR_T.
 455
 456 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
 457
 458         PR libstdc++/98725
 459         * include/bits/locale_conv.h (wstring_convert, wbuffer_convert):
 460         Define unconditionally. Do not check _GLIBCXX_USE_WCHAR_T.
 461
 462 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
 463
 464         PR libstdc++/98725
 465         * include/c_global/cstddef [!_GLIBCXX_USE_WCHAR_T]
 466         (__byte_operand<wchar_t>): Define specialization.
 467         * include/std/type_traits (__make_signed<wchar_t>)
 468         (__make_unsigned<wchar_t>): Remove redundant check for
 469         __WCHAR_TYPE__ being defined.
 470         * include/tr1/type_traits [!_GLIBCXX_USE_WCHAR_T]
 471         (__is_integral_helper<wchar_t>): Likewise.
 472
 473 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
 474
 475         PR libstdc++/98725
 476         * include/ext/rc_string_base.h [!_GLIBCXX_USE_WCHAR_T]
 477         (__rc_string_base<wchar_t>): Define member function.
 478         * include/ext/vstring.h [!_GLIBCXX_USE_WCHAR_T]
 479         (hash<__gnu_cxx::__wvstring>): Define specialization.
 480         * include/ext/vstring_fwd.h [!_GLIBCXX_USE_WCHAR_T] (__wvstring)
 481         (__wsso_string, __wrc_string): Declare typedefs.
 482
 483 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
 484
 485         PR libstdc++/98725
 486         * include/bits/char_traits.h (char_traits<wchar_t>): Define
 487         explicit specialization unconditionally.
 488         * include/bits/basic_string.h (hash<wstring>): Define
 489         unconditionally. Do not check _GLIBCXX_USE_WCHAR_T.
 490         * include/bits/stringfwd.h (wstring): Likewise.
 491         * include/debug/string (wstring): Likewise.
 492         * include/experimental/string_view (experimental::wstring_view)
 493         (hash<experimental::wstring_view>): Likewise.
 494         * include/std/string (pmr::wstring, hash<pmr::wstring>):
 495         Likewise.
 496         * include/std/string_view (wstring_view, hash<wstring_view>):
 497         Likewise.
 498
 499 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
 500
 501         * testsuite/27_io/basic_filebuf/close/81256.cc: Moved to...
 502         * testsuite/27_io/basic_filebuf/close/wchar_t/81256.cc: ...here.
 503
 504 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
 505
 506         * testsuite/22_locale/conversions/buffer/1.cc: Check
 507         _GLIBCXX_USE_WCHAR_T.
 508         * testsuite/22_locale/conversions/buffer/3.cc: Likewise. Add
 509         test using char16_t.
 510         * testsuite/22_locale/conversions/string/1.cc: Check
 511         _GLIBCXX_USE_WCHAR_T.
 512         * testsuite/27_io/filesystem/path/generic/generic_string.cc:
 513         Likewise.
 514         * testsuite/27_io/filesystem/path/modifiers/make_preferred.cc:
 515         Likewise.
 516         * testsuite/27_io/filesystem/path/native/alloc.cc: Likewise.
 517         * testsuite/27_io/filesystem/path/native/string-char8_t.cc:
 518         Likewise.
 519         * testsuite/27_io/filesystem/path/native/string.cc: Likewise.
 520         * testsuite/28_regex/algorithms/regex_match/extended/wstring_locale.cc:
 521         Likewise.
 522         * testsuite/experimental/filesystem/path/generic/generic_string.cc:
 523         Likewise.
 524         * testsuite/experimental/filesystem/path/native/alloc.cc:
 525         Likewise.
 526         * testsuite/experimental/filesystem/path/native/string-char8_t.cc:
 527         Likewise.
 528         * testsuite/experimental/filesystem/path/native/string.cc:
 529         Likewise.
 530
 531 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
 532
 533         * testsuite/26_numerics/bit/bit.rotate/rotr.cc:
 534         * testsuite/util/testsuite_common_types.h:
 535
 536 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
 537
 538         * testsuite/18_support/numeric_limits/40856.cc: Replace use of
 539         _GLIBCXX_USE_INT128.
 540         * testsuite/18_support/numeric_limits/dr559.cc: Likewise.
 541         * testsuite/18_support/numeric_limits/lowest.cc: Likewise.
 542         * testsuite/18_support/numeric_limits/max_digits10.cc: Likewise.
 543         * testsuite/20_util/is_floating_point/value.cc: Likewise.
 544         * testsuite/20_util/is_integral/value.cc: Likewise.
 545         * testsuite/20_util/is_signed/value.cc: Likewise.
 546         * testsuite/20_util/is_unsigned/value.cc: Likewise.
 547         * testsuite/20_util/make_signed/requirements/typedefs-1.cc:
 548         Likewise.
 549         * testsuite/20_util/make_signed/requirements/typedefs-2.cc:
 550         Likewise.
 551         * testsuite/20_util/make_unsigned/requirements/typedefs-1.cc:
 552         Likewise.
 553         * testsuite/20_util/make_unsigned/requirements/typedefs-2.cc:
 554         Likewise.
 555         * testsuite/20_util/type_identity/requirements/typedefs.cc:
 556         Likewise.
 557         * testsuite/26_numerics/bit/bit.count/countl_one.cc: Likewise.
 558         * testsuite/26_numerics/bit/bit.count/countl_zero.cc: Likewise.
 559         * testsuite/26_numerics/bit/bit.count/countr_one.cc: Likewise.
 560         * testsuite/26_numerics/bit/bit.count/countr_zero.cc: Likewise.
 561         * testsuite/26_numerics/bit/bit.count/popcount.cc: Likewise.
 562         * testsuite/26_numerics/bit/bit.pow.two/bit_ceil.cc: Likewise.
 563         * testsuite/26_numerics/bit/bit.pow.two/bit_floor.cc: Likewise.
 564         * testsuite/26_numerics/bit/bit.pow.two/bit_width.cc: Likewise.
 565         * testsuite/26_numerics/bit/bit.pow.two/has_single_bit.cc:
 566         Likewise.
 567         * testsuite/26_numerics/bit/bit.rotate/rotl.cc: Likewise.
 568
 569 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
 570
 571         * include/bits/hashtable_policy.h (_Select1st): Replace use of
 572         std::get.
 573         (_Select2nd): Remove.
 574         (_NodeBuilder::_S_build): Use _NodeGenerator::__node_type
 575         typedef instead of deducing it. Remove unnecessary piecewise
 576         construction.
 577         (_ReuseOrAllocNode): Make __node_type public.
 578         (_Map_base): Adjust partial specialization to be able to extract
 579         the mapped_type without using tuple_element.
 580         (_Map_base::at): Define inline
 581         * testsuite/23_containers/unordered_map/requirements/53339.cc:
 582         Remove XFAIL.
 583         * testsuite/23_containers/unordered_multimap/requirements/53339.cc:
 584         Likewise.
 585
 586 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
 587
 588         * include/bits/hashtable.h: Move static assertion to destructor.
 589         * include/bits/hashtable_policy.h: Deduce value type from node
 590         type without instantiating it.
 591
 592 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
 593
 594         * src/c++11/limits.cc: Fail if __cpp_inline_variables is
 595         defined.
 596
 597 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
 598
 599         PR libstdc++/92546
 600         * include/bits/ranges_algobase.h: Replace <iterator> with a
 601         subset of the headers it includes.
 602
 603 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
 604
 605         * include/experimental/deque (erase, erase_if): Revert changes
 606         to avoid debug mode overhead.
 607         * include/experimental/map (erase, erase_if): Likewise.
 608         * include/experimental/set (erase, erase_if): Likewise.
 609         * include/experimental/unordered_map (erase, erase_if):
 610         Likewise.
 611         * include/experimental/unordered_set (erase, erase_if):
 612         Likewise.
 613         * include/experimental/vector (erase, erase_if): Likewise.
 614         * include/std/deque (erase, erase_if): Likewise.
 615         * include/std/map (erase, erase_if): Likewise.
 616         * include/std/set (erase, erase_if): Likewise.
 617         * include/std/unordered_map (erase, erase_if): Likewise.
 618         * include/std/unordered_set (erase, erase_if): Likewise.
 619         * include/std/vector (erase, erase_if): Likewise.
 620
 621 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
 622
 623         * include/std/chrono (__detail::__units_suffix_misc): New
 624         helper function.
 625         (__detail::__units_suffix): Likewise.
 626         (chrono::operator<<(basic_ostream&, const duration&)): Define.
 627         * testsuite/20_util/duration/io.cc: New test.
 628
 629 2021-10-07  Jonathan Wakely  <jwakely@redhat.com>
 630
 631         * include/Makefile.am: Add new header.
 632         * include/Makefile.in: Regenerate.
 633         * include/std/chrono (duration, time_point, system_clock)
 634         (steady_clock, high_resolution_clock, chrono_literals, sys_time)
 635         (file_clock, file_time): Move to ...
 636         * include/bits/chrono.h: New file.
 637         * include/bits/atomic_futex.h: Include new header instead of
 638         <chrono>.
 639         * include/bits/atomic_timed_wait.h: Likewise.
 640         * include/bits/fs_fwd.h: Likewise.
 641         * include/bits/semaphore_base.h: Likewise.
 642         * include/bits/this_thread_sleep.h: Likewise.
 643         * include/bits/unique_lock.h: Likewise.
 644         * include/experimental/bits/fs_fwd.h: Likewise.
 645         * include/experimental/chrono: Likewise.
 646         * include/experimental/io_context: Likewise.
 647         * include/experimental/netfwd: Likewise.
 648         * include/experimental/timer: Likewise.
 649         * include/std/condition_variable: Likewise.
 650         * include/std/mutex: Likewise.
 651         * include/std/shared_mutex: Likewise.
 652
 653 2021-10-07  Jonathan Wakely  <jwakely@redhat.com>
 654
 655         PR libstdc++/102377
 656         * include/bits/atomic_wait.h (__waiter_pool_base:_S_align):
 657         Hardcode to 64 instead of using non-constant constant.
 658
 659 2021-10-07  Jonathan Wakely  <jwakely@redhat.com>
 660
 661         * include/bits/erase_if.h (__erase_nodes_if): Remove redundant
 662         __niter_base calls.
 663         * include/std/string (erase, erase_if): Likewise.
 664         * include/std/deque (erase, erase_if): Access non-debug
 665         container directly.
 666         * include/std/map (erase, erase_if): Likewise.
 667         * include/std/set (erase, erase_if): Likewise.
 668         * include/std/unordered_map (erase, erase_if): Likewise.
 669         * include/std/unordered_set (erase, erase_if): Likewise.
 670         * include/std/vector (erase, erase_if): Likewise.
 671         * include/experimental/deque (erase, erase_if): Likewise.
 672         * include/experimental/map (erase, erase_if): Likewise.
 673         * include/experimental/set (erase, erase_if): Likewise.
 674         * include/experimental/unordered_map (erase, erase_if):
 675         Likewise.
 676         * include/experimental/unordered_set (erase, erase_if):
 677         Likewise.
 678         * include/experimental/vector (erase, erase_if): Likewise.
 679
 680 2021-10-06  Jonathan Wakely  <jwakely@redhat.com>
 681
 682         * include/Makefile.am: Add new headers.
 683         * include/Makefile.in: Regenerate.
 684         * include/std/functional: Include <bits/move_only_function.h>.
 685         * include/std/version (__cpp_lib_move_only_function): Define.
 686         * include/bits/mofunc_impl.h: New file.
 687         * include/bits/move_only_function.h: New file.
 688         * testsuite/20_util/move_only_function/call.cc: New test.
 689         * testsuite/20_util/move_only_function/cons.cc: New test.
 690         * testsuite/20_util/move_only_function/move.cc: New test.
 691         * testsuite/20_util/move_only_function/version.cc: New test.
 692
 693 2021-10-05  Jonathan Wakely  <jwakely@redhat.com>
 694
 695         * testsuite/21_strings/basic_string_view/requirements/trivially_copyable.cc:
 696         New test.
 697         * testsuite/23_containers/span/trivially_copyable.cc: New test.
 698
 699 2021-10-05  Jonathan Wakely  <jwakely@redhat.com>
 700
 701         * include/bits/utility.h (__is_in_place_type_v): Define
 702         variable template to detect in_place_type_t specializations.
 703         (__is_in_place_type): Replace class template with alias
 704         template using __is_in_place_type_v.
 705         * include/std/any (any(T&&)): Check __is_in_place_type first and
 706         avoid instantiating is_copy_constructible unnecessarily.
 707
 708 2021-10-05  Jonathan Wakely  <jwakely@redhat.com>
 709
 710         * testsuite/20_util/integer_comparisons/greater.cc: New test.
 711
 712 2021-10-05  Jonathan Wakely  <jwakely@redhat.com>
 713
 714         * testsuite/27_io/basic_ostream/inserters_other/char/volatile_ptr.cc:
 715         Check result matches non-volatile pointer.
 716
 717 2021-10-05  Jonathan Wakely  <jwakely@redhat.com>
 718
 719         PR c++/102535
 720         * testsuite/20_util/is_trivially_constructible/value.cc: Adjust
 721         expected value for C++20.
 722
 723 2021-10-05  Jonathan Wakely  <jwakely@redhat.com>
 724
 725         * include/bits/std_function.h (_Any_data::_M_access): Add
 726         noexcept.
 727         (_Function_base::_Base_manager::_M_get_pointer): Likewise.
 728         (_Function_base::_Base_manager::_M_not_empty_function):
 729         Likewise.
 730
 731 2021-10-05  Jonathan Wakely  <jwakely@redhat.com>
 732
 733         * include/std/ostream (operator<<(const volatile void*)):
 734         Add new overload, as per P1147R1.
 735         * testsuite/27_io/basic_ostream/inserters_other/char/volatile_ptr.cc:
 736         New test.
 737
 738 2021-10-05  Jonathan Wakely  <jwakely@redhat.com>
 739
 740         * include/bits/stl_queue.h
 741         (__cpp_lib_adaptor_iterator_pair_constructor): Set to correct
 742         value.
 743         * include/bits/stl_stack.h
 744         (__cpp_lib_adaptor_iterator_pair_constructor): Likewise.
 745         * include/std/version
 746         (__cpp_lib_adaptor_iterator_pair_constructor): Likewise.
 747         * testsuite/23_containers/queue/cons_from_iters.cc: Update
 748         expected value.
 749         * testsuite/23_containers/stack/cons_from_iters.cc: Likewise.
 750
 751 2021-10-04  Jonathan Wakely  <jwakely@redhat.com>
 752
 753         * include/bits/forward_list.h (forward_list): Use non-deduced
 754         context for allocator parameter of allocator-extended copy and
 755         move constructors.
 756         * include/bits/stl_bvector.h (vector<bool>): Likewise.
 757         * include/bits/stl_deque.h (deque): Likewise.
 758         * include/bits/stl_list.h (list): Likewise.
 759         * include/bits/stl_map.h (map): Likewise.
 760         * include/bits/stl_multimap.h (multimap): Likewise.
 761         * include/bits/stl_multiset.h (multiset): Likewise.
 762         * include/bits/stl_set.h (set): Likewise.
 763         * include/bits/stl_vector.h (vector): Likewise.
 764         * include/bits/stl_queue.h (queue, priority_queue): Do not
 765         constrain Allocator template parameter of deduction guides that
 766         have a Container parameter.
 767         * include/bits/stl_stack.h (stack): Likewise.
 768         * include/debug/deque (__gnu_debug::deque): Use non-deduced
 769         context for allocator parameter of allocator-extended copy and
 770         move constructors.
 771         * include/debug/list (__gnu_debug::list): Likewise.
 772         * include/debug/map.h (__gnu_debug::map): Likewise.
 773         * include/debug/multimap.h (__gnu_debug::multimap): Likewise.
 774         * include/debug/multiset.h (__gnu_debug::multiset): Likewise.
 775         * include/debug/set.h (__gnu_debug::set): Likewise.
 776         * include/debug/vector (__gnu_debug::vector): Likewise.
 777         * testsuite/23_containers/deque/cons/deduction.cc: Test class
 778         template argument deduction with non-deduced allocator
 779         arguments.
 780         * testsuite/23_containers/forward_list/cons/deduction.cc:
 781         Likewise.
 782         * testsuite/23_containers/list/cons/deduction.cc: Likewise.
 783         * testsuite/23_containers/map/cons/deduction.cc: Likewise.
 784         * testsuite/23_containers/multimap/cons/deduction.cc: Likewise.
 785         * testsuite/23_containers/multiset/cons/deduction.cc: Likewise.
 786         * testsuite/23_containers/priority_queue/deduction.cc: Likewise.
 787         * testsuite/23_containers/queue/deduction.cc: Likewise.
 788         * testsuite/23_containers/set/cons/deduction.cc: Likewise.
 789         * testsuite/23_containers/stack/deduction.cc: Likewise.
 790         * testsuite/23_containers/unordered_map/cons/deduction.cc:
 791         Likewise.
 792         * testsuite/23_containers/unordered_multimap/cons/deduction.cc:
 793         Likewise.
 794         * testsuite/23_containers/unordered_multiset/cons/deduction.cc:
 795         Likewise.
 796         * testsuite/23_containers/unordered_set/cons/deduction.cc:
 797         Likewise.
 798         * testsuite/23_containers/vector/cons/deduction.cc: Likewise.
 799
 800 2021-10-04  Jonathan Wakely  <jwakely@redhat.com>
 801
 802         * include/std/variant (__detail::__variant::__as): Add missing
 803         noexcept to first overload.
 804
 805 2021-10-04  Jonathan Wakely  <jwakely@redhat.com>
 806
 807         * include/bits/basic_string.h (basic_string(nullptr_t)): Define
 808         as deleted.
 809         (operator=(nullptr_t)): Likewise.
 810         * include/bits/cow_string.h (basic_string(nullptr_t)): Likewise.
 811         (operator=(nullptr_t)): Likewise.
 812         * include/std/string_view (basic_string_view(nullptr_t)):
 813         Likewise.
 814         * testsuite/21_strings/basic_string/cons/char/nullptr.cc: New test.
 815         * testsuite/21_strings/basic_string_view/cons/char/nonnull.cc:
 816         Change dg-warning to dg-error.
 817         * testsuite/21_strings/basic_string_view/cons/wchar_t/nonnull.cc:
 818         Likewise.
 819
 820 2021-10-02  Jonathan Wakely  <jwakely@redhat.com>
 821
 822         * src/c++17/fs_ops.cc (create_directory): Fix typo in enum name.
 823         * src/filesystem/ops-common.h (__last_system_error): Add
 824         explicit cast to avoid narrowing conversion.
 825         (do_space): Fix type in function name.
 826
 827 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
 828
 829         PR libstdc++/102100
 830         * include/Makefile.am (c++config.h): Define
 831         _GLIBCXX_VERBOSE_ASSERT based on configure output.
 832         * include/Makefile.in: Regenerate.
 833         * include/bits/c++config: Fix condition for verbose assertions.
 834
 835 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
 836
 837         PR libstdc++/92546
 838         * include/bits/erase_if.h (__erase_nodes_if): Use __niter_base to
 839         unwrap debug iterators.
 840         * include/bits/refwrap.h: Do not error if included in C++03.
 841         * include/bits/stl_algo.h (__remove_if): Move to ...
 842         * include/bits/stl_algobase.h (__remove_if): ... here.
 843         * include/std/deque (erase, erase_if): Use __remove_if instead of
 844         remove and remove_if.
 845         * include/std/string (erase, erase_if): Likewise.
 846         * include/std/vector (erase, erase_if): Likewise.
 847
 848 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
 849
 850         PR libstdc++/66742
 851         * include/bits/list.tcc (list::sort()): Use _Scratch_list
 852         objects for splicing and merging.
 853         (list::sort(StrictWeakOrdering)): Likewise.
 854         * include/bits/stl_list.h (__detail::_Scratch_list): New type.
 855         * src/c++98/list.cc (_List_node_base::_M_transfer): Add
 856         assertion for --enable-libstdcxx-debug library.
 857         * testsuite/23_containers/list/operations/66742.cc: New test.
 858
 859 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
 860
 861         PR libstdc++/100612
 862         * include/std/thread (__pmf_expects_stop_token): New variable
 863         template to detect a pointer to member function that needs a
 864         stop_token to be added to the arguments.
 865         (jthread::__S_create): Use __pmf_expects_stop_token.
 866         (jthread::__S_create_pmf): New function.
 867         * testsuite/30_threads/jthread/100612.cc: New test.
 868
 869 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
 870
 871         * include/bits/stl_queue.h
 872         (__cpp_lib_adaptor_iterator_pair_constructor): Define for C++23, as
 873         per P1425R4.
 874         (queue(InputIterator, InputIterator)): Likewise.
 875         (queue(InputIterator, InputIterator, const Alloc&)): Likewise.
 876         * include/bits/stl_stack.h
 877         (__cpp_lib_adaptor_iterator_pair_constructor): Likewise.
 878         (stack(InputIterator, InputIterator)): Likewise.
 879         (stack(InputIterator, InputIterator, const Alloc&)): Likewise.
 880         * include/std/version (__cpp_lib_adaptor_iterator_pair_constructor):
 881         Define.
 882         * testsuite/23_containers/queue/cons_from_iters.cc: New test.
 883         * testsuite/23_containers/stack/cons_from_iters.cc: New test.
 884
 885 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
 886
 887         * include/bits/stl_queue.h (priority_queue): Add
 888         allocator-extended overloads for constructors taking iterator.
 889         * testsuite/23_containers/priority_queue/lwg3506.cc: New test.
 890
 891 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
 892
 893         * include/bits/stl_queue.h (priority_queue): Construct sequence
 894         from iterators when no sequence argument is present (LWG 3529).
 895         * testsuite/23_containers/priority_queue/lwg3529.cc: New test.
 896
 897 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
 898
 899         * include/bits/stl_queue.h (priority_queue): Constrain
 900         constructors with InputIterator parameters (LWG 3522).
 901         * testsuite/23_containers/priority_queue/lwg3522.cc: New test.
 902
 903 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
 904
 905         * include/bits/ranges_base.h (ranges::distance): Split overload
 906         into two (LWG 3392).
 907         * testsuite/24_iterators/range_operations/lwg3392.cc: New test.
 908
 909 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
 910
 911         * testsuite/30_threads/thread/cons/3.cc: Remove derivation from
 912         std::unary_function.
 913         * testsuite/30_threads/thread/cons/4.cc: Likewise.
 914         * testsuite/30_threads/thread/cons/5.cc: Likewise.
 915
 916 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
 917
 918         * testsuite/ext/pb_ds/example/basic_multimap.cc: Remove
 919         unnecesary derivation from std::unary_function.
 920         * testsuite/ext/pb_ds/example/erase_if.cc: Likewise.
 921         * testsuite/ext/pb_ds/example/hash_illegal_resize.cc: Likewise.
 922         * testsuite/ext/pb_ds/example/hash_initial_size.cc: Likewise.
 923         * testsuite/ext/pb_ds/example/hash_load_set_change.cc: Likewise.
 924         * testsuite/ext/pb_ds/example/hash_mod.cc: Likewise.
 925         * testsuite/ext/pb_ds/example/hash_resize.cc: Likewise.
 926         * testsuite/ext/pb_ds/example/hash_shift_mask.cc: Likewise.
 927         * testsuite/ext/pb_ds/example/priority_queue_dijkstra.cc:
 928         Likewise.
 929         * testsuite/ext/pb_ds/example/ranged_hash.cc: Likewise.
 930         * testsuite/ext/pb_ds/example/store_hash.cc: Likewise.
 931
 932 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
 933
 934         * src/c++11/functexcept.cc (__throw_out_of_range_fmt): Do not
 935         expand the format string for freestanding, or non-vebose, or if
 936         we're just going to abort anyway.
 937         * src/c++11/snprintf_lite.cc: Remove unused header and
 938         declaration.
 939
 940 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
 941
 942         * include/std/variant (__do_visit): Use variant_npos instead of
 943         literal -1 that requires a narrowing conversion.
 944
 945 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
 946
 947         PR libstdc++/99327
 948         * src/filesystem/ops-common.h (__unsupported): New function to
 949         return a suitable error code for missing functionality.
 950         (posix::off_t): New typedef.
 951         (posix::*): Set errno to ENOSYS instead of ENOTSUP for no-op
 952         fallback implementations.
 953         (do_copy_file): Replace uses of errc::not_supported.
 954         * src/c++17/fs_ops.cc (fs::copy, fs::copy_file, create_dir)
 955         (fs::create_directory, fs::create_directory_symlink)
 956         (fs::create_hard_link, fs::create_symlink, fs::current_path)
 957         (fs::equivalent, do_stat, fs::file_size, fs::hard_link_count)
 958         (fs::last_write_time, fs::permissions, fs::read_symlink):
 959         Replace uses of errc::not_supported.
 960         (fs::resize_file): Qualify off_t.
 961         * src/filesystem/ops.cc (fs::copy, fs::copy_file, create_dir)
 962         (fs::create_directory, fs::create_directory_symlink)
 963         (fs::create_hard_link, fs::create_symlink, fs::current_path)
 964         (fs::equivalent, do_stat, fs::file_size, fs::last_write_time)
 965         (fs::permissions, fs::read_symlink, fs::system_complete):
 966         Replace uses of errc::not_supported.
 967         (fs::resize_file): Qualify off_t and enable unconditionally.
 968         * testsuite/19_diagnostics/system_error/cons-1.cc: Likewise.
 969
 970 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
 971
 972         * src/filesystem/ops-common.h (last_error): New helper function.
 973         (filesystem::do_space): Use last_error().
 974         * src/c++17/fs_ops.cc (fs::absolute, fs::create_hard_link)
 975         (fs::equivalent, fs::remove, fs::temp_directory_path): Use
 976         last_error().
 977         * src/filesystem/ops.cc (fs::create_hard_link)
 978         (fs::remove, fs::temp_directory_path): Likewise.
 979
 980 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
 981
 982         * include/std/type_traits (__conditional): New class template
 983         for internal uses of std::conditional.
 984         (__conditional_t): New alias template to replace conditional_t.
 985         (__and_, __or_, __result_of_memfun, __result_of_memobj): Use
 986         __conditional_t instead of conditional::type.
 987         * include/bits/atomic_base.h (__atomic_impl::_Diff): Likewise.
 988         * include/bits/hashtable.h (_Hashtable): Likewise.
 989         * include/bits/hashtable_policy.h (_Node_iterator, _Insert_base)
 990         (_Local_iterator): Likewise. Replace typedefs with
 991         using-declarations.
 992         * include/bits/move.h (move_if_noexcept): Use __conditional_t.
 993         * include/bits/parse_numbers.h (_Select_int_base): Likewise.
 994         * include/bits/ptr_traits.h (__make_not_void): Likewise.
 995         * include/bits/ranges_algobase.h (__copy_or_move_backward)
 996         (__copy_or_move): Likewise.
 997         * include/bits/ranges_base.h (borrowed_iterator_t): Likewise.
 998         * include/bits/ranges_util.h (borrowed_subrange_t): Likewise.
 999         * include/bits/regex_compiler.h (_BracketMatcher): Use
1000         __conditional_t. Replace typedefs with using-declarations.
1001         * include/bits/shared_ptr_base.h (__shared_count): Use
1002         __conditional_t.
1003         * include/bits/stl_algobase.h (__copy_move, __copy_move_backward):
1004         Likewise.
1005         * include/bits/stl_iterator.h (__detail::__clamp_iter_cat)
1006         (reverse_iterator::iterator_concept)
1007         (__make_move_if_noexcept_iterator)
1008         (iterator_traits<common_iterator<_It, _Sent>>)
1009         (iterator_traits<counted_iterator<_It>>): Likewise.
1010         * include/bits/stl_pair.h (_PCC, pair::operator=): Likewise.
1011         * include/bits/stl_tree.h (_Rb_tree::insert_return_type)
1012         (_Rb_tree::_M_clone_node): Likewise.
1013         * include/bits/unique_ptr.h (unique_ptr(unique_ptr<U,E>&&)):
1014         Likewise.
1015         * include/bits/uses_allocator.h (__uses_alloc): Likewise.
1016         (__is_uses_allocator_predicate): Likewise.
1017         * include/debug/functions.h (__foreign_iterator_aux2): Likewise.
1018         * include/experimental/any (any::_Manager, __any_caster):
1019         Likewise.
1020         * include/experimental/executor (async_completion): Likewise.
1021         * include/experimental/functional (__boyer_moore_base_t):
1022         Likewise.
1023         * include/std/any (any::_Manager): Likewise.
1024         * include/std/functional (__boyer_moore_base_t): Likewise.
1025         * include/std/ranges (borrowed_iterator_t)
1026         (borrowed_subrange_t, __detail::__maybe_present_t)
1027         (__detail::__maybe_const_t, split_view): Likewise.
1028         * include/std/tuple (__empty_not_final, tuple::operator=):
1029         Likewise.
1030         * include/std/variant (__detail::__variant::__get_t): Likewise.
1031
1032 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1033
1034         PR libstdc++/78113
1035         * include/std/variant (__do_visit): Use a switch when we have a
1036         single variant with a small number of alternatives.
1037
1038 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1039
1040         PR libstdc++/90943
1041         * include/std/variant (__cpp_lib_variant): Update value.
1042         (__detail::__variant::__as): New helpers implementing the
1043         as-variant exposition-only function templates.
1044         (visit, visit<R>): Use __as to upcast the variant parameters.
1045         * include/std/version (__cpp_lib_variant): Update value.
1046         * testsuite/20_util/variant/visit_inherited.cc: New test.
1047
1048 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1049
1050         * include/bits/stl_iterator.h (__normal_iterator): Simplify
1051         converting constructor and do not require _Container::pointer.
1052
1053 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1054
1055         * include/bits/cow_string.h [_GLIBCXX_FULLY_DYNAMIC_STRING]
1056         (basic_string(basic_string&&)): Add noexcept and avoid
1057         allocation, by sharing rep with the rvalue string.
1058
1059 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1060
1061         * include/bits/stl_iterator.h (common_iterator::__arrow_proxy)
1062         (common_iterator::__postfix_proxy): Add noexcept.
1063
1064 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1065
1066         PR libstdc++/94418
1067         * include/bits/stl_iterator.h (reverse_iterator): Use
1068         conditional noexcept on constructors and assignment operators.
1069         * testsuite/24_iterators/reverse_iterator/noexcept.cc: New test.
1070
1071 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1072
1073         PR libstdc++/100153
1074         * include/bits/vector.tcc (vector<bool>::_M_shrink_to_fit()):
1075         When size() is zero just deallocate and reset.
1076
1077 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1078
1079         PR libstdc++/96733
1080         * include/bits/stl_algo.h (clamp): Use std::min and std::max.
1081
1082 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1083
1084         * include/bits/regex.h (basic_regex::multiline): Define for
1085         non-strict C++11 and C++14 modes.
1086         * include/bits/regex_constants.h (regex_constants::multiline):
1087         Add _GLIBCXX_RESOLVE_LIB_DEFECTS comment.
1088
1089 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1090
1091         * testsuite/25_algorithms/is_permutation/2.cc: Include <iterator>.
1092
1093 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1094
1095         * include/bits/stream_iterator.h (istream_iterator): Add
1096         noexcept to constructors and non-throwing member functions and
1097         friend functions.
1098         (ostream_iterator): Likewise.
1099
1100 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1101
1102         * include/bits/boost_concept_check.h (_Is_vector_bool_iterator):
1103         New trait to identify vector<bool> iterators, including debug
1104         ones.
1105         (_ForwardIteratorReferenceConcept): Add default template
1106         argument using _Is_vector_bool_iterator and use it in partial
1107         specialization for the vector<bool> cases.
1108         (_Mutable_ForwardIteratorReferenceConcept): Likewise.
1109         * testsuite/24_iterators/operations/prev_neg.cc: Adjust dg-error
1110         line number.
1111
1112 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1113
1114         * include/bits/list.tcc (list::merge): Remove call to size() and
1115         try-catch block. Use _Finalize_merge instead.
1116         * include/bits/stl_list.h (list::_Finalize_merge): New
1117         scope guard type to update _M_size members after a merge.
1118
1119 2021-09-30  Jonathan Wakely  <jwakely@redhat.com>
1120
1121         * include/bits/regex.h (basic_regex::multiline): Fix #if
1122         condition.
1123
1124 2021-09-29  Jonathan Wakely  <jwakely@redhat.com>
1125
1126         * include/bits/regex.h (basic_regex::multiline): Define constant
1127         for C++17.
1128         * include/bits/regex_constants.h (regex_constants::multiline):
1129         Define constant for C++17.
1130         (regex_constants::__multiline): Define duplicate constant for
1131         internal use in C++11 and C++14.
1132         * include/bits/regex_executor.h (_Executor::_M_match_multiline()):
1133         New member function.
1134         (_Executor::_M_is_line_terminator(_CharT)): New member function.
1135         (_Executor::_M_at_begin(), _Executor::_M_at_end()): Use new
1136         member functions to support multiline matches.
1137         * testsuite/28_regex/algorithms/regex_match/multiline.cc: New test.
1138
1139 2021-09-29  Jonathan Wakely  <jwakely@redhat.com>
1140
1141         * include/bits/regex_compiler.h (_Compiler::_S_validate): New
1142         function.
1143         * include/bits/regex_compiler.tcc (_Compiler::_Compiler): Use
1144         _S_validate to check flags.
1145         * include/bits/regex_error.h (_S_grammar): New error code for
1146         internal use.
1147         * testsuite/28_regex/basic_regex/ctors/grammar.cc: New test.
1148
1149 2021-09-29  Jonathan Wakely  <jwakely@redhat.com>
1150
1151         PR libstdc++/84110
1152         * include/bits/regex_error.h (regex_constants::_S_null): New
1153         error code for internal use.
1154         * include/bits/regex_scanner.tcc (_Scanner::_M_scan_normal()):
1155         Check for null character.
1156         * testsuite/28_regex/basic_regex/84110.cc: New test.
1157
1158 2021-09-29  Jonathan Wakely  <jwakely@redhat.com>
1159
1160         * include/bits/regex.h (__detail::__is_contiguous_iter): Move
1161         here from <bits/regex_compiler.h>.
1162         (basic_regex::_M_compile): New function to compile an NFA from
1163         a regular expression string.
1164         (basic_regex::basic_regex): Use _M_compile instead of delegating
1165         to other constructors.
1166         (basic_regex::operator=(const basic_regex&)): Define as
1167         defaulted.
1168         (basic_regex::operator=(initializer_list<C>)): Use _M_compile.
1169         (basic_regex::assign(const basic_regex&)): Use copy assignment.
1170         (basic_regex::assign(basic_regex&&)): Use move assignment.
1171         (basic_regex::assign(const C*, flag_type)): Use _M_compile
1172         instead of constructing a temporary string.
1173         (basic_regex::assign(const C*, size_t, flag_type)): Likewise.
1174         (basic_regex::assign(const basic_string<C,T,A>&, flag_type)):
1175         Use _M_compile instead of constructing a temporary basic_regex.
1176         (basic_regex::assign(InputIter, InputIter, flag_type)): Avoid
1177         constructing a temporary string for contiguous iterators of the
1178         right value type.
1179         * include/bits/regex_compiler.h (__is_contiguous_iter): Move to
1180         <bits/regex.h>.
1181         (__enable_if_contiguous_iter, __disable_if_contiguous_iter)
1182         (__compile_nfa): Remove.
1183         * testsuite/28_regex/basic_regex/assign/exception_safety.cc: New
1184         test.
1185         * testsuite/28_regex/basic_regex/ctors/char/other.cc: New test.
1186
1187 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
1188
1189         * include/bits/atomic_timed_wait.h (__platform_wait_until_impl):
1190         Return false for ETIMEDOUT and true otherwise.
1191
1192 2021-09-28  François Dumont  <fdumont@gcc.gnu.org>
1193
1194         * testsuite/20_util/default_delete/48631_neg.cc: Adapt dg-prune-output message
1195         to also match message with '__8' in it.
1196
1197 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
1198
1199         * include/bits/regex_automaton.h (_NFA_base::_SizeT): Remove.
1200         * include/bits/regex_compiler.h (_Compiler::_IterT): Remove.
1201         * include/bits/regex_compiler.tcc: Likewise.
1202         * include/bits/regex_scanner.h (_Scanner::_IterT): Remove.
1203         * include/bits/regex_scanner.tcc: Likewise.
1204
1205 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
1206
1207         * include/bits/regex_compiler.tcc: Add line break in empty while
1208         statement.
1209         * include/bits/regex_executor.tcc: Avoid unused parameter
1210         warning.
1211
1212 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
1213
1214         * include/bits/regex.h (basic_regex, swap): Add noexcept to
1215         non-throwing functions.
1216         * include/bits/regex_automaton.h (_State_base, _State)
1217         (_NFA_base): Likewise.
1218         * include/bits/regex_compiler.h (_Compiler): Likewise.
1219         * include/bits/regex_error.h (regex_error::code()): Likewise.
1220         * include/bits/regex_scanner.h (_Scanner): Likewise.
1221
1222 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
1223
1224         * include/bits/atomic_wait.h (_GLIBCXX_HAVE_PLATFORM_WAIT):
1225         Define before first attempt to check it.
1226
1227 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
1228
1229         * testsuite/23_containers/priority_queue/requirements/explicit_instantiation/1.cc:
1230         Do not check non-default constructible sequences when
1231         _GLIBCXX_CONCEPT_CHECKS is defined.
1232         * testsuite/23_containers/priority_queue/requirements/explicit_instantiation/1_c++98.cc:
1233         Likewise.
1234         * testsuite/23_containers/queue/requirements/explicit_instantiation/1.cc:
1235         Likewise.
1236         * testsuite/23_containers/queue/requirements/explicit_instantiation/1_c++98.cc:
1237         Likewise.
1238         * testsuite/23_containers/stack/requirements/explicit_instantiation/1.cc:
1239         Likewise.
1240         * testsuite/23_containers/stack/requirements/explicit_instantiation/1_c++98.cc:
1241         Likewise.
1242
1243 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
1244
1245         * testsuite/23_containers/deque/requirements/explicit_instantiation/3.cc:
1246         Do not test implicit allocator rebinding when _GLIBCXX_CONCEPT_CHECKS
1247         is defined.
1248         * testsuite/23_containers/forward_list/requirements/explicit_instantiation/3.cc:
1249         Likewise.
1250         * testsuite/23_containers/list/requirements/explicit_instantiation/3.cc:
1251         Likewise.
1252         * testsuite/23_containers/list/requirements/explicit_instantiation/5.cc:
1253         Likewise.
1254         * testsuite/23_containers/map/requirements/explicit_instantiation/3.cc:
1255         Likewise.
1256         * testsuite/23_containers/map/requirements/explicit_instantiation/5.cc:
1257         Likewise.
1258         * testsuite/23_containers/multimap/requirements/explicit_instantiation/3.cc:
1259         Likewise.
1260         * testsuite/23_containers/multimap/requirements/explicit_instantiation/5.cc:
1261         Likewise.
1262         * testsuite/23_containers/multiset/requirements/explicit_instantiation/3.cc:
1263         Likewise.
1264         * testsuite/23_containers/multiset/requirements/explicit_instantiation/5.cc:
1265         Likewise.
1266         * testsuite/23_containers/set/requirements/explicit_instantiation/3.cc:
1267         Likewise.
1268         * testsuite/23_containers/set/requirements/explicit_instantiation/5.cc:
1269         Likewise.
1270         * testsuite/23_containers/unordered_map/requirements/explicit_instantiation/3.cc:
1271         Likewise.
1272         * testsuite/23_containers/unordered_multimap/requirements/explicit_instantiation/3.cc:
1273         Likewise.
1274         * testsuite/23_containers/unordered_multiset/requirements/explicit_instantiation/3.cc:
1275         Likewise.
1276         * testsuite/23_containers/unordered_set/requirements/explicit_instantiation/3.cc:
1277         Likewise.
1278         * testsuite/23_containers/vector/ext_pointer/explicit_instantiation/3.cc:
1279         Likewise.
1280         * testsuite/23_containers/vector/requirements/explicit_instantiation/3.cc:
1281         Likewise.
1282
1283 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
1284
1285         * include/bits/boost_concept_check.h (_ForwardIteratorConcept)
1286         (_BidirectionalIteratorConcept, _RandomAccessIteratorConcept):
1287         Check result types of iterator operations.
1288         (_Mutable_ForwardIteratorConcept): Check that iterator's
1289         reference type is a reference to its value type.
1290         (_Mutable_BidirectionalIteratorConcept): Do not require the
1291         value type to be assignable.
1292         (_Mutable_RandomAccessIteratorConcept): Likewise.
1293         * testsuite/24_iterators/operations/prev_neg.cc: Adjust dg-error
1294         line number.
1295
1296 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
1297
1298         * testsuite/25_algorithms/copy/34595.cc: Add missing operation
1299         for type used as an iterator.
1300         * testsuite/25_algorithms/unique_copy/check_type.cc: Likewise.
1301
1302 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
1303
1304         * testsuite/20_util/is_nothrow_swappable/value.h: Use custom
1305         comparison function for priority_queue of type with no
1306         relational operators.
1307         * testsuite/20_util/is_swappable/value.h: Likewise.
1308         * testsuite/24_iterators/output/concept.cc: Add operator< to
1309         type used in set.
1310
1311 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
1312
1313         * include/bits/boost_concept_check.h (_OutputIteratorConcept):
1314         Use a function to preserve value category of the type.
1315         * include/bits/stl_algobase.h (copy, move, fill_n): Use a
1316         reference as the second argument for _OutputIteratorConcept.
1317         (copy_backward, move_backward): Use _OutputIteratorConcept
1318         instead of _ConvertibleConcept.
1319
1320 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
1321
1322         * include/bits/stl_iterator.h (pointer_traits): Define partial
1323         specialization for __normal_iterator.
1324         * testsuite/24_iterators/normal_iterator/to_address.cc: New test.
1325
1326 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
1327
1328         * include/bits/move.h (forward(remove_reference_t<T>&&)):
1329         Improve text of static_assert.
1330         * testsuite/20_util/forward/c_neg.cc: Adjust dg-error.
1331         * testsuite/20_util/forward/f_neg.cc: Likewise.
1332
1333 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
1334
1335         PR libstdc++/102499
1336         * include/bits/fs_path.h (path::begin, path::end): Add noexcept
1337         to declarations, to match definitions.
1338
1339 2021-09-24  Jonathan Wakely  <jwakely@redhat.com>
1340
1341         * include/bits/range_access.h (cbegin, cend): Remove redundant
1342         'inline' specifier.
1343
1344 2021-09-23  Jonathan Wakely  <jwakely@redhat.com>
1345
1346         * testsuite/20_util/specialized_algorithms/memory_management_tools/destroy_neg.cc:
1347         Remove dg-error lines for C++20-only errors.
1348
1349 2021-09-23  Jonathan Wakely  <jwakely@redhat.com>
1350
1351         * testsuite/19_diagnostics/headers/system_error/93151.cc:
1352         Disable PCH.
1353
1354 2021-09-23  Jonathan Wakely  <jwakely@redhat.com>
1355
1356         * src/c++11/system_error.cc (system_error_category) [_WIN32]:
1357         Map Windows error codes to generic POSIX error numbers. Use
1358         FormatMessage instead of strerror.
1359         * testsuite/19_diagnostics/error_category/system_category.cc:
1360         Adjust for new behaviour on Windows.
1361
1362 2021-09-23  Jonathan Wakely  <jwakely@redhat.com>
1363
1364         * src/c++11/system_error.cc (generic_error_category): Define
1365         class and virtual functions as 'final'.
1366         (generic_error_category::equivalent(int, const error_condition&)):
1367         Override.
1368         (system_error_category): Define class and virtual functions as
1369         'final'.
1370         (system_error_category::equivalent(int, const error_condition&)):
1371         Override.
1372         (generic_category_instance, system_category_instance): Use
1373         constinit union to make the objects immortal.
1374
1375 2021-09-23  Jonathan Wakely  <jwakely@redhat.com>
1376
1377         PR libstdc++/102425
1378         * src/c++11/system_error.cc
1379         (system_error_category::default_error_condition): Add 0 to
1380         switch.
1381         * testsuite/19_diagnostics/error_category/102425.cc: New test.
1382
1383 2021-09-17  Jonathan Wakely  <jwakely@redhat.com>
1384
1385         * include/bits/fs_path.h (path::iterator): Add noexcept to all
1386         member functions and friend functions.
1387         (distance): Add noexcept.
1388         (advance): Add noexcept and inline.
1389         * include/experimental/bits/fs_path.h (path::iterator):
1390         Add noexcept to all member functions.
1391
1392 2021-09-17  Jonathan Wakely  <jwakely@redhat.com>
1393
1394         PR libstdc++/102270
1395         * include/std/tuple (_Tuple_impl): Add constexpr to constructor
1396         missed in previous patch.
1397         * testsuite/20_util/tuple/cons/102270.C: Moved to...
1398         * testsuite/20_util/tuple/cons/102270.cc: ...here.
1399         * testsuite/util/testsuite_allocator.h (SimpleAllocator): Add
1400         constexpr to constructor so it can be used for C++20 tests.
1401
1402 2021-09-17  Jonathan Wakely  <jwakely@redhat.com>
1403
1404         * testsuite/26_numerics/valarray/dr630-3.C: Moved to...
1405         * testsuite/26_numerics/valarray/dr630-3.cc: ...here.
1406         * testsuite/27_io/basic_iostream/cons/16251.C: Moved to...
1407         * testsuite/27_io/basic_iostream/cons/16251.cc: ...here.
1408
1409 2021-09-16  Jonathan Wakely  <jwakely@redhat.com>
1410
1411         * src/Makefile.am (stamp-debug): Add all Makefiles as
1412         prerequisites.
1413         * src/Makefile.in: Regenerate.
1414
1415 2021-09-16  Jonathan Wakely  <jwakely@redhat.com>
1416
1417         * testsuite/ext/pb_ds/regression/tree_map_rand.cc: Increase
1418         timeout factor to 3.
1419         * testsuite/ext/pb_ds/regression/tree_set_rand.cc: Likewise.
1420
1421 2021-09-16  Jonathan Wakely  <jwakely@redhat.com>
1422
1423         * doc/xml/manual/using.xml: Generalize to apply to more than
1424         just -std=c++11.
1425         * doc/html/manual/using_macros.html: Regenerate.
1426
1427 2021-09-16  Jonathan Wakely  <jwakely@redhat.com>
1428
1429         * include/std/optional (nullptr_t): Make constructor noexcept.
1430
1431 2021-09-16  Jonathan Wakely  <jwakely@redhat.com>
1432
1433         * include/bits/fs_path.h (advance): Remove non-deducible
1434         template parameter.
1435
1436 2021-09-16  Jonathan Wakely  <jwakely@redhat.com>
1437
1438         PR libstdc++/102270
1439         * include/std/tuple (_Head_base, _Tuple_impl): Add
1440         _GLIBCXX20_CONSTEXPR to allocator-extended constructors.
1441         (tuple<>::swap(tuple&)): Add _GLIBCXX20_CONSTEXPR.
1442         * testsuite/20_util/tuple/cons/102270.C: New test.
1443
1444 2021-09-16  Jonathan Wakely  <jwakely@redhat.com>
1445
1446         PR libstdc++/102280
1447         * include/std/span (span(Range&&)): Add constraint to deduction
1448         guide.
1449
1450 2021-09-16  Jonathan Wakely  <jwakely@redhat.com>
1451
1452         * src/c++98/Makefile.am: Use CXXCOMPILE not LTCXXCOMPILE.
1453         * src/c++98/Makefile.in: Regenerate.
1454
1455 2021-09-16  Jonathan Wakely  <jwakely@redhat.com>
1456
1457         * include/bits/basic_string.h [_GLIBCXX_USE_CXX11_ABI]
1458         (to_string): Add noexcept if the type width is 32 bits or less.
1459
1460 2021-09-16  Jonathan Wakely  <jwakely@redhat.com>
1461
1462         * include/bits/unique_ptr.h (__uniq_ptr_impl::_M_ptr)
1463         (__uniq_ptr_impl::_M_deleter): Add noexcept.
1464
1465 2021-09-16  Thomas Rodgers  <rodgert@twrodgers.com>
1466
1467         PR libstdc++/101761
1468         * testsuite/29_atomics/atomic_ref/wait_notify.cc (test): Use
1469         va and vb as arguments to wait/notify, remove unused bb local.
1470
1471 2021-09-15  Hugo Beauzée-Luyssen  <hugo@beauzee.fr>
1472
1473         * crossconfig.m4: Check for TLS support on mingw.
1474         * configure: Regenerate.
1475
1476 2021-09-13  Jason Merrill  <jason@redhat.com>
1477
1478         * include/std/version: Define __cpp_lib_hardware_interference_size.
1479         * libsupc++/new: Define hardware interference size variables.
1480
1481 2021-09-10  Jonathan Wakely  <jwakely@redhat.com>
1482
1483         * testsuite/experimental/net/internet/resolver/ops/lookup.cc:
1484         Fix invalid hostname to only match the .invalid TLD.
1485
1486 2021-09-02  Jonathan Wakely  <jwakely@redhat.com>
1487
1488         * include/bits/atomic_base.h (__atomic_base<P*>::compare_exchange_weak):
1489         Add new functions.
1490         * include/std/atomic (atomic<T*>::compare_exchange_weak): Use
1491         it.
1492
1493 2021-09-02  Jonathan Wakely  <jwakely@redhat.com>
1494
1495         * include/std/atomic: Tweak whitespace.
1496
1497 2021-09-02  Jonathan Wakely  <jwakely@redhat.com>
1498
1499         PR c++/102177
1500         * include/bits/atomic_base.h (__is_valid_cmpexch_failure_order):
1501         New function to check if a memory order is valid for the failure
1502         case of compare exchange operations.
1503         (__atomic_base<I>::compare_exchange_weak): Simplify assertions
1504         by using __is_valid_cmpexch_failure_order.
1505         (__atomic_base<I>::compare_exchange_strong): Likewise.
1506         (__atomic_base<P*>::compare_exchange_weak): Likewise.
1507         (__atomic_base<P*>::compare_exchange_strong): Likewise.
1508         (__atomic_impl::compare_exchange_weak): Add assertion.
1509         (__atomic_impl::compare_exchange_strong): Likewise.
1510         * include/std/atomic (atomic::compare_exchange_weak): Likewise.
1511         (atomic::compare_exchange_strong): Likewise.
1512
1513 2021-09-02  Jonathan Wakely  <jwakely@redhat.com>
1514
1515         * include/std/functional (invoke_r): Define.
1516         * include/std/version (__cpp_lib_invoke_r): Define.
1517         * testsuite/20_util/function_objects/invoke/version.cc: Check
1518         for __cpp_lib_invoke_r as well as __cpp_lib_invoke.
1519         * testsuite/20_util/function_objects/invoke/4.cc: New test.
1520
1521 2021-08-31  Jonathan Wakely  <jwakely@redhat.com>
1522
1523         PR libstdc++/98421
1524         * include/std/span (span(Iter, size_type), span(Iter, Iter)):
1525         Add valid range checks.
1526         * testsuite/23_containers/span/cons_1_assert_neg.cc: New test.
1527         * testsuite/23_containers/span/cons_2_assert_neg.cc: New test.
1528
1529 2021-08-31  Jonathan Wakely  <jwakely@redhat.com>
1530
1531         * configure.ac: Fix checks for F_GETFL, F_SETFL and O_NONBLOCK.
1532         * configure: Regenerate.
1533
1534 2021-08-31  Jonathan Wakely  <jwakely@redhat.com>
1535
1536         * src/c++11/system_error.cc (error_category::~error_category()):
1537         Remove noexcept-specifier.
1538         (system_error::~system_error()): Likewise.
1539         * testsuite/19_diagnostics/error_category/noexcept.cc: New test.
1540         * testsuite/19_diagnostics/system_error/noexcept.cc: New test.
1541
1542 2021-08-31  Jonathan Wakely  <jwakely@redhat.com>
1543
1544         PR libstdc++/102074
1545         * include/bits/atomic_timed_wait.h (__timed_waiter_pool)
1546         [!_GLIBCXX_HAVE_PLATFORM_TIMED_WAIT]: Add missing return.
1547
1548 2021-08-31  Jonathan Wakely  <jwakely@redhat.com>
1549
1550         * include/experimental/internet (__make_resolver_error_code):
1551         Handle EAI_SYSTEM errors.
1552         (basic_resolver_results): Use __make_resolver_error_code. Use
1553         Glibc NI_MAXHOST and NI_MAXSERV values for buffer sizes.
1554
1555 2021-08-31  Jonathan Wakely  <jwakely@redhat.com>
1556
1557         * testsuite/experimental/net/internet/resolver/ops/lookup.cc:
1558         Try other service if "http" fails.
1559
1560 2021-08-31  Jonathan Wakely  <jwakely@redhat.com>
1561
1562         * testsuite/17_intro/names.cc: Undefine some more names used
1563         by Solaris system headers.
1564
1565 2021-08-30  Jason Merrill  <jason@redhat.com>
1566
1567         PR c++/96286
1568         * testsuite/30_threads/promise/requirements/lwg3466.cc:
1569         Remove dg-prune-outputs.
1570
1571 2021-08-28  Jonathan Wakely  <jwakely@redhat.com>
1572
1573         * include/bits/alloc_traits.h (allocator_traits): Add explicit
1574         specialization for allocator<void>. Improve doxygen comments.
1575         * include/bits/allocator.h (allocator<void>): Restore for the
1576         versioned namespace.
1577         (allocator<void>::construct, allocator<void>::destroy): Remove.
1578         * include/ext/extptr_allocator.h (_Extptr_allocator<void>):
1579         Add default constructor and converting constructor.
1580
1581 2021-08-28  Jonathan Wakely  <jwakely@redhat.com>
1582
1583         * include/bits/stl_uninitialized.h: Fix typo in comment.
1584
1585 2021-08-28  Jonathan Wakely  <jwakely@redhat.com>
1586
1587         PR libstdc++/99876
1588         * src/c++17/fs_ops.cc (fs::absolute): Call non-throwing form,
1589         to avoid unnecessary current_path() call.
1590
1591 2021-08-28  Jonathan Wakely  <jwakely@redhat.com>
1592
1593         * include/bits/std_function.h (function::function(F&&)): Give
1594         name to defaulted template parameter, to improve diagnostics.
1595         Use markdown for more doxygen comments.
1596
1597 2021-08-26  Jonathan Wakely  <jwakely@redhat.com>
1598
1599         * include/bits/std_function.h (function): Adjust doxygen
1600         comments.
1601         * include/bits/unique_ptr.h (make_unique_for_overwrite):
1602         Change parameter name to match doxygen comment.
1603
1604 2021-08-26  Jonathan Wakely  <jwakely@redhat.com>
1605
1606         * include/bits/std_function.h (_function_base::_Base_manager):
1607         Replace _M_init_functor with a function template using a
1608         forwarding reference, and a pair of _M_create function
1609         templates. Reuse _M_create for the clone operation.
1610         (function::_Decay_t): New alias template.
1611         (function::_Callable): Simplify by using _Decay.
1612         (function::function(F)): Change parameter to forwarding
1613         reference, as per LWG 2447. Add noexcept-specifier. Simplify
1614         constraints.
1615         (function::operator=(F&&)): Add noexcept-specifier.
1616         * testsuite/20_util/function/cons/lwg2774.cc: New test.
1617         * testsuite/20_util/function/cons/noexcept.cc: New test.
1618
1619 2021-08-26  Jonathan Wakely  <jwakely@redhat.com>
1620
1621         * include/bits/std_function.h (function::function(F)): Add
1622         static assertions to check constructibility requirements.
1623
1624 2021-08-26  Jonathan Wakely  <jwakely@redhat.com>
1625
1626         PR libstdc++/100285
1627         * configure.ac: Check for O_NONBLOCK.
1628         * configure: Regenerate.
1629         * include/experimental/internet: Include <ws2tcpip.h> for
1630         Windows.  Use preprocessor conditions around more constants.
1631         * include/experimental/socket: Use preprocessor conditions
1632         around more constants.
1633         * testsuite/experimental/net/internet/resolver/base.cc: Only use
1634         constants when the corresponding C macro is defined.
1635         * testsuite/experimental/net/socket/basic_socket.cc: Likewise.
1636         * testsuite/experimental/net/socket/socket_base.cc: Likewise.
1637         Make preprocessor checks more fine-grained.
1638
1639 2021-08-25  Jonathan Wakely  <jwakely@redhat.com>
1640
1641         * testsuite/17_intro/names.cc: Check 'sz'.
1642
1643 2021-08-25  Jonathan Wakely  <jwakely@redhat.com>
1644
1645         * testsuite/17_intro/names.cc: Adjust for Windows.
1646
1647 2021-08-25  Jonathan Wakely  <jwakely@redhat.com>
1648
1649         * include/std/valarray: Uglify 'func' parameters.
1650         * testsuite/17_intro/names.cc: Add 'func' to checks.
1651
1652 2021-08-25  Jonathan Wakely  <jwakely@redhat.com>
1653
1654         PR libstdc++/102064
1655         * include/bits/stl_uninitialized.h (_GLIBCXX_USE_ASSIGN_FOR_INIT):
1656         Define macro to check conditions for optimizing trivial cases.
1657         (__check_constructible): New function to do static assert.
1658         (uninitialized_copy, uninitialized_fill, uninitialized_fill_n):
1659         Use new macro.
1660         * testsuite/20_util/specialized_algorithms/uninitialized_copy/1.cc:
1661         Adjust dg-error pattern.
1662         * testsuite/23_containers/vector/cons/89164.cc: Likewise. Add
1663         C++17-specific checks from 89164_c++17.cc.
1664         * testsuite/23_containers/vector/cons/89164_c++17.cc: Removed.
1665         * testsuite/20_util/specialized_algorithms/uninitialized_copy/102064.cc:
1666         New test.
1667         * testsuite/20_util/specialized_algorithms/uninitialized_copy_n/102064.cc:
1668         New test.
1669         * testsuite/20_util/specialized_algorithms/uninitialized_fill/102064.cc:
1670         New test.
1671         * testsuite/20_util/specialized_algorithms/uninitialized_fill_n/102064.cc:
1672         New test.
1673
1674 2021-08-25  Jonathan Wakely  <jwakely@redhat.com>
1675
1676         PR libstdc++/102048
1677         * include/ext/rope (rope::erase(size_type)): Remove broken
1678         function.
1679
1680 2021-08-24  Jonathan Wakely  <jwakely@redhat.com>
1681
1682         * doc/xml/manual/status_cxx2020.xml: Update table.
1683         * doc/html/manual/status.html: Regenerate.
1684
1685 2021-08-24  Jonathan Wakely  <jwakely@redhat.com>
1686
1687         * include/std/type_traits (is_layout_compatible): Define.
1688         (is_corresponding_member): Define.
1689         * include/std/version (__cpp_lib_is_layout_compatible): Define.
1690         * testsuite/20_util/is_layout_compatible/is_corresponding_member.cc:
1691         New test.
1692         * testsuite/20_util/is_layout_compatible/value.cc: New test.
1693         * testsuite/20_util/is_layout_compatible/version.cc: New test.
1694         * testsuite/20_util/is_pointer_interconvertible/with_class.cc:
1695         New test.
1696         * testsuite/23_containers/span/layout_compat.cc: Do not use real
1697         std::is_layout_compatible trait if available.
1698
1699 2021-08-24  Jonathan Wakely  <jwakely@redhat.com>
1700
1701         * src/c++11/cxx11-shim_facets.cc: Fix mismatched class-key in
1702         explicit instantiation definitions.
1703
1704 2021-08-23  Jonathan Wakely  <jwakely@redhat.com>
1705
1706         * include/std/ranges (basic_istream_view): Add default template
1707         argument.
1708         * testsuite/std/ranges/istream_view.cc: Check it.
1709
1710 2021-08-23  Jonathan Wakely  <jwakely@redhat.com>
1711
1712         * libsupc++/dyncast.cc (__dynamic_cast): Add __builtin_expect to
1713         precondition check.
1714
1715 2021-08-23  Jonathan Wakely  <jwakely@redhat.com>
1716
1717         PR libstdc++/90787
1718         * testsuite/util/testsuite_fs.h (permissions_are_testable):
1719         Define as inline.
1720
1721 2021-08-20  Jonathan Wakely  <jwakely@redhat.com>
1722
1723         PR libstdc++/90787
1724         * testsuite/27_io/filesystem/iterators/directory_iterator.cc:
1725         Use new __gnu_test::permissions_are_testable() function.
1726         * testsuite/27_io/filesystem/iterators/recursive_directory_iterator.cc:
1727         Likewise.
1728         * testsuite/27_io/filesystem/operations/exists.cc: Likewise.
1729         * testsuite/27_io/filesystem/operations/is_empty.cc: Likewise.
1730         * testsuite/27_io/filesystem/operations/remove.cc: Likewise.
1731         * testsuite/27_io/filesystem/operations/remove_all.cc: Likewise.
1732         * testsuite/27_io/filesystem/operations/status.cc: Likewise.
1733         * testsuite/27_io/filesystem/operations/symlink_status.cc:
1734         Likewise.
1735         * testsuite/27_io/filesystem/operations/temp_directory_path.cc:
1736         Likewise.
1737         * testsuite/experimental/filesystem/iterators/directory_iterator.cc:
1738         Likewise.
1739         * testsuite/experimental/filesystem/iterators/recursive_directory_iterator.cc:
1740         Likewise.
1741         * testsuite/experimental/filesystem/operations/exists.cc:
1742         Likewise.
1743         * testsuite/experimental/filesystem/operations/is_empty.cc:
1744         Likewise.
1745         * testsuite/experimental/filesystem/operations/remove.cc:
1746         Likewise.
1747         * testsuite/experimental/filesystem/operations/remove_all.cc:
1748         Likewise.
1749         * testsuite/experimental/filesystem/operations/temp_directory_path.cc:
1750         Likewise.
1751         * testsuite/util/testsuite_fs.h (__gnu_test::permissions_are_testable):
1752         New function to guess whether testing permissions will work.
1753
1754 2021-08-19  Jonathan Wakely  <jwakely@redhat.com>
1755
1756         * doc/xml/manual/status_cxx2020.xml: Move row  earlier in table.
1757         * doc/html/manual/status.html: Regenerate.
1758
1759 2021-08-19  Jonathan Wakely  <jwakely@redhat.com>
1760
1761         * doc/doxygen/user.cfg.in: Update to Doxygen 1.9.2
1762
1763 2021-08-19  Jonathan Wakely  <jwakely@redhat.com>
1764
1765         PR libstdc++/101965
1766         * include/std/charconv (__to_chars_i): Remove redundant check.
1767
1768 2021-08-19  Jonathan Wakely  <jwakely@redhat.com>
1769
1770         PR libstdc++/101960
1771         * include/std/tuple (_Tuple_impl(_Tuple_impl&&)): Use base
1772         class' move constructor. Define as defaulted for versioned
1773         namespace.
1774         * testsuite/20_util/tuple/cons/101960.cc: New test.
1775
1776 2021-08-19  Jonathan Wakely  <jwakely@redhat.com>
1777
1778         PR libstdc++/100139
1779         * doc/xml/manual/status_cxx2020.xml: Add P1739R4 to status table.
1780         * doc/html/manual/status.html: Regenerate.
1781
1782 2021-08-19  Jonathan Wakely  <jwakely@redhat.com>
1783
1784         * include/bits/shared_ptr.h: Add @since and @headerfile tags.
1785         * include/bits/unique_ptr.h: Add @headerfile tags.
1786
1787 2021-08-19  Jonathan Wakely  <jwakely@redhat.com>
1788
1789         * src/filesystem/ops-common.h (filesystem::file_time): Improve
1790         overflow check by using system_clock::duration::max().
1791
1792 2021-08-19  Jonathan Wakely  <jwakely@redhat.com>
1793
1794         * include/bits/stl_tree.h: Tweak whitespace.
1795
1796 2021-08-18  Jonathan Wakely  <jwakely@redhat.com>
1797
1798         * include/bits/unique_ptr.h (default_delete): Add @since tag.
1799         (unique_ptr, unique_ptr<T[]>): Likewise. Improve @brief.
1800         (make_unique, make_unique_for_overwrite): Likewise. Add @tparam,
1801         @param, and @returns.
1802         (_MakeUniq): Move to __detail namespace. Add alias template
1803         helpers.
1804
1805 2021-08-18  Jonathan Wakely  <jwakely@redhat.com>
1806
1807         * include/bits/stl_function.h: Improve doxygen comments.
1808
1809 2021-08-18  Jonathan Wakely  <jwakely@redhat.com>
1810
1811         * doc/doxygen/user.cfg.in (PREDEFINED): Enable doxygen
1812         processing for C++20 components and components that depend on
1813         compiler features.
1814         * include/bits/stl_algo.h (random_shuffle): Use @deprecated.
1815         * include/std/type_traits: Improve doxygen comments for C++20
1816         traits.
1817
1818 2021-08-18  Jonathan Wakely  <jwakely@redhat.com>
1819
1820         * include/ext/type_traits.h (__promote_2, __promote_3)
1821         (__promote_4): Redfine as alias templates using __promoted_t.
1822         * include/std/complex (__promote_2): Remove partial
1823         specializations for std::complex.
1824
1825 2021-08-18  Jonathan Wakely  <jwakely@redhat.com>
1826
1827         * include/bits/stl_algo.h (min(initializer_list<T>))
1828         (min(initializer_list<T>, Compare)): Call __min_element directly to
1829         avoid redundant debug checks for valid ranges.
1830         (max(initializer_list<T>), max(initializer_list<T>, Compare)):
1831         Likewise, for __max_element.
1832         (minmax(initializer_list<T>), minmax(initializer_list<T>, Compare)):
1833         Likewise, for __minmax_element.
1834
1835 2021-08-18  Jonathan Wakely  <jwakely@redhat.com>
1836
1837         * include/debug/deque (deque(size_type, const T&, const A&)):
1838         Prevent class template argument deduction and replace with a
1839         deduction guide.
1840         * include/debug/forward_list (forward_list(size_type, const T&, const A&)):
1841         Likewise.
1842         * include/debug/list (list(size_type, const T&, const A&)):
1843         Likewise.
1844         * include/debug/vector (vector(size_type, const T&, const A&)):
1845         Likewise.
1846
1847 2021-08-18  Jonathan Wakely  <jwakely@redhat.com>
1848
1849         * python/libstdcxx/v6/printers.py (StdBitReferencePrinter): Use
1850         'std::vector<bool>::reference' as type name, not _Bit_reference.
1851         (build_libstdcxx_dictionary): Register printers for vector<bool>
1852         types in debug mode too.
1853         * testsuite/libstdc++-prettyprinters/simple.cc: Adjust expected
1854         output for invalid _Bit_reference. Use vector<bool>::reference
1855         instead of _Bit_reference.
1856         * testsuite/libstdc++-prettyprinters/simple11.cc: Likewise.
1857
1858 2021-08-17  Thomas Schwinge  <thomas@codesourcery.com>
1859
1860         * testsuite/lib/libstdc++.exp: Avoid illegal argument to verbose,
1861         continued.
1862
1863 2021-08-17  Luc Michel  <lmichel@kalray.eu>
1864             Marc Poulhies  <mpoulhies@kalrayinc.com>
1865
1866         * testsuite/lib/gdb-test.exp (gdb_version_check)
1867         (gdb_version_check_xmethods): Only check the GDB version for
1868         local native targets.
1869
1870 2021-08-17  Antony Polukhin  <antoshkka@gmail.com>
1871             Jonathan Wakely  <jwakely@redhat.com>
1872
1873         * include/bits/random.tcc (seed_seq::seed_seq): Reserve capacity
1874         if distance is O(1).
1875         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error
1876         line number.
1877
1878 2021-08-17  Jonathan Wakely  <jwakely@redhat.com>
1879
1880         * testsuite/26_numerics/random/seed_seq/cons/range.cc: Check
1881         construction from input iterators.
1882
1883 2021-08-17  Jonathan Wakely  <jwakely@redhat.com>
1884
1885         * python/libstdcxx/v6/printers.py (StdErrorCatPrinter): Remove.
1886
1887 2021-08-17  Jonathan Wakely  <jwakely@redhat.com>
1888
1889         PR libstdc++/101923
1890         * include/bits/std_function.h (function(function&&)): Check for
1891         non-empty parameter before doing any work.
1892
1893 2021-08-17  Jonathan Wakely  <jwakely@redhat.com>
1894
1895         * include/bits/cow_string.h (basic_string::contains): Do not
1896         define for -std=gnu++20.
1897
1898 2021-08-17  Jonathan Wakely  <jwakely@redhat.com>
1899
1900         * include/bits/ranges_util.h (__not_same_as): Rename to
1901         __different_from.
1902         * include/std/ranges (__not_same_as): Likewise.
1903
1904 2021-08-17  Jonathan Wakely  <jwakely@redhat.com>
1905
1906         * include/std/utility (exchange): Add noexcept-specifier.
1907         * testsuite/20_util/exchange/noexcept.cc: New test.
1908
1909 2021-08-17  Jonathan Wakely  <jwakely@redhat.com>
1910
1911         * python/libstdcxx/v6/printers.py (StdErrorCodePrinter): Define.
1912         (build_libstdcxx_dictionary): Register printer for
1913         std::error_code and std::error_condition.
1914         * testsuite/libstdc++-prettyprinters/cxx11.cc: Test it.
1915
1916 2021-08-16  Jonathan Wakely  <jwakely@redhat.com>
1917
1918         PR libstdc++/101937
1919         * src/c++11/debug.cc (PrintContext::_M_indent): Replace with a
1920         static data member.
1921         (print_word): Use qualified-id to access it.
1922
1923 2021-08-16  Jonathan Wakely  <jwakely@redhat.com>
1924
1925         * python/Makefile.am [GLIBCXX_BUILD_DEBUG] (install-data-local):
1926         Install another copy of the GDB hook.
1927         * python/Makefile.in: Regenerate.
1928
1929 2021-08-12  Jonathan Wakely  <jwakely@redhat.com>
1930
1931         PR libstdc++/101870
1932         * include/c_global/cmath (hypot): Use __promoted_t.
1933         (lerp): Add new overload accepting any arithmetic types.
1934         * include/ext/type_traits.h (__promoted_t): New alias template.
1935         * testsuite/26_numerics/lerp.cc: Moved to...
1936         * testsuite/26_numerics/lerp/1.cc: ...here.
1937         * testsuite/26_numerics/lerp/constexpr.cc: New test.
1938         * testsuite/26_numerics/lerp/version.cc: New test.
1939
1940 2021-08-12  Jonathan Wakely  <jwakely@redhat.com>
1941
1942         * testsuite/26_numerics/lerp.cc: Add header name to #error.
1943         * testsuite/26_numerics/midpoint/integral.cc: Likewise.
1944         * testsuite/26_numerics/midpoint/version.cc: New test.
1945
1946 2021-08-12  Jonathan Wakely  <jwakely@redhat.com>
1947
1948         * include/experimental/random (experimental::randint): Add
1949         nodiscard attribute.
1950
1951 2021-08-12  Jonathan Wakely  <jwakely@redhat.com>
1952
1953         * src/c++98/locale_init.cc: Require C++11.
1954         * src/c++98/localename.cc: Likewise.
1955         * src/c++98/misc-inst.cc: Require C++98.
1956
1957 2021-08-11  Jonathan Wakely  <jwakely@redhat.com>
1958
1959         PR libstdc++/101866
1960         * testsuite/experimental/random/randint.cc: Loop and retry if
1961         reseed() produces the same sequence.
1962
1963 2021-08-11  Jonathan Wakely  <jwakely@redhat.com>
1964
1965         * include/std/type_traits (__cpp_lib_is_pointer_interconvertible)
1966         (is_pointer_interconvertible_base_of_v)
1967         (is_pointer_interconvertible_base_of): Define for C++20.
1968         * include/std/version (__cpp_lib_is_pointer_interconvertible):
1969         Define.
1970         * testsuite/23_containers/span/layout_compat.cc: Use correct
1971         feature test macro for std::is_layout_compatible_v.
1972         * testsuite/20_util/is_pointer_interconvertible/value.cc: New test.
1973         * testsuite/20_util/is_pointer_interconvertible/version.cc: New test.
1974
1975 2021-08-09  Jonathan Wakely  <jwakely@redhat.com>
1976
1977         * include/bits/regex.h (basic_regex::transform_primary): Use
1978         _GLIBCXX_STD_C::vector for local variable.
1979         * include/bits/regex.tcc (__regex_algo_impl): Use reference to
1980         _GLIBCXX_STD_C::vector base class of match_results.
1981         * include/bits/regex_automaton.tcc (_StateSeq:_M_clone): Use
1982         _GLIBCXX_STD_C::map and _GLIBCXX_STD_C::deque for local
1983         variables.
1984         * include/bits/regex_compiler.h (_BracketMatcher): Use
1985         _GLIBCXX_STD_C::vector for data members.
1986         * include/bits/regex_executor.h (_Executor): Likewise.
1987         * include/std/regex [_GLIBCXX_DEBUG]: Include <debug/vector>.
1988
1989 2021-08-09  François Dumont  <fdumont@gcc.gnu.org>
1990
1991         * include/debug/safe_container.h
1992         (_Safe_container(_Safe_container&&, const _Alloc&, std::true_type)): New.
1993         (_Safe_container(_Safe_container&&, const _Alloc&, std::false_type)): New.
1994         (_Safe_container(_Safe_container&&, const _Alloc&)): Use latters.
1995
1996 2021-08-09  Jonathan Wakely  <jwakely@redhat.com>
1997
1998         * testsuite/23_containers/unordered_map/cons/default.cc: Add
1999         equality comparison operators to allocator.
2000         * testsuite/23_containers/unordered_set/cons/default.cc:
2001         Likewise.
2002
2003 2021-08-08  François Dumont  <fdumont@gcc.gnu.org>
2004
2005         * testsuite/25_algorithms/copy/debug/constexpr_neg.cc: Replace 'failed_assertion'
2006         dg-prune-output reason with 'builtin_unreachable'.
2007         * testsuite/25_algorithms/copy_backward/debug/constexpr_neg.cc: Likewise.
2008         * testsuite/25_algorithms/equal/debug/constexpr_neg.cc: Likewise.
2009         * testsuite/25_algorithms/lower_bound/debug/constexpr_partitioned_neg.cc: Likewise.
2010         * testsuite/25_algorithms/lower_bound/debug/constexpr_partitioned_pred_neg.cc: Likewise.
2011         * testsuite/25_algorithms/lower_bound/debug/constexpr_valid_range_neg.cc: Likewise.
2012         * testsuite/25_algorithms/upper_bound/debug/constexpr_partitioned_neg.cc: Likewise.
2013         * testsuite/25_algorithms/upper_bound/debug/constexpr_partitioned_pred_neg.cc: Likewise.
2014         * testsuite/25_algorithms/upper_bound/debug/constexpr_valid_range_neg.cc: Likewise.
2015
2016 2021-08-08  Hans-Peter Nilsson  <hp@bitrange.com>
2017
2018         * testsuite/std/ranges/iota/max_size_type.cc: Set
2019         dg-timeout-factor to 4.
2020
2021 2021-08-06  Jonathan Wakely  <jwakely@redhat.com>
2022
2023         * libsupc++/compare (compare_three_way, strong_order)
2024         (weak_order, partial_order, compare_strong_order_fallback)
2025         (compare_weak_order_fallback, compare_partial_order_fallback):
2026         Move nodiscard attributes to correct location.
2027
2028 2021-08-05  Jonathan Wakely  <jwakely@redhat.com>
2029
2030         PR libstdc++/101782
2031         * include/bits/ranges_base.h (ranges::begin, ranges::end)
2032         (ranges::rbegin, ranges::rend, ranges::size, ranges::ssize)
2033         (ranges::empty, ranges::data): Move attribute after the
2034         declarator-id instead of at the end of the declarator.
2035         * include/bits/stl_iterator.h (__gnu_cxx::__normal_iterator):
2036         Move attributes back to the start of the function declarator,
2037         but move the requires-clause to the end.
2038         (common_iterator): Move attribute after the declarator-id.
2039         * include/bits/stl_queue.h (queue): Remove ill-formed attributes
2040         from friend declaration that are not definitions.
2041         * include/std/ranges (views::all, views::filter)
2042         (views::transform, views::take, views::take_while,
2043         views::drop) (views::drop_while, views::join,
2044         views::lazy_split) (views::split, views::counted,
2045         views::common, views::reverse) (views::elements): Move
2046         attributes after the declarator-id.
2047
2048 2021-08-05  Jonathan Wakely  <jwakely@redhat.com>
2049
2050         * libsupc++/compare (partial_ordering, weak_ordering)
2051         (strong_ordering, is_eq, is_neq, is_lt, is_lteq, is_gt, is_gteq)
2052         (compare_three_way, strong_order, weak_order, partial_order)
2053         (compare_strong_order_fallback, compare_weak_order_fallback)
2054         (compare_partial_order_fallback, __detail::__synth3way): Add
2055         nodiscard attribute.
2056         * testsuite/18_support/comparisons/categories/zero_neg.cc: Add
2057         -Wno-unused-result to options.
2058
2059 2021-08-05  Jonathan Wakely  <jwakely@redhat.com>
2060
2061         PR libstdc++/101782
2062         * include/bits/ranges_base.h (ranges::begin, ranges::end)
2063         (ranges::rbegin, ranges::rend, ranges::size, ranges::ssize)
2064         (ranges::empty, ranges::data): Move attribute to the end of
2065         the declarator.
2066         * include/bits/stl_iterator.h (__gnu_cxx::__normal_iterator)
2067         (common_iterator): Likewise for non-member operator functions.
2068         * include/std/ranges (views::all, views::filter)
2069         (views::transform, views::take, views::take_while, views::drop)
2070         (views::drop_while, views::join, views::lazy_split)
2071         (views::split, views::counted, views::common, views::reverse)
2072         (views::elements): Likewise.
2073         * testsuite/std/ranges/access/101782.cc: New test.
2074
2075 2021-08-04  Jonathan Wakely  <jwakely@redhat.com>
2076
2077         * include/bits/forward_list.h: Add [[nodiscard]] to functions
2078         with no side-effects.
2079         * include/bits/stl_bvector.h: Likewise.
2080         * include/bits/stl_deque.h: Likewise.
2081         * include/bits/stl_list.h: Likewise.
2082         * include/bits/stl_queue.h: Likewise.
2083         * include/bits/stl_stack.h: Likewise.
2084         * include/bits/stl_vector.h: Likewise.
2085         * include/debug/deque: Likewise.
2086         * include/debug/forward_list: Likewise.
2087         * include/debug/list: Likewise.
2088         * include/debug/safe_iterator.h: Likewise.
2089         * include/debug/vector: Likewise.
2090         * include/std/array: Likewise.
2091         * testsuite/23_containers/array/creation/3_neg.cc: Use
2092         -Wno-unused-result.
2093         * testsuite/23_containers/array/debug/back1_neg.cc: Cast result
2094         to void.
2095         * testsuite/23_containers/array/debug/back2_neg.cc: Likewise.
2096         * testsuite/23_containers/array/debug/front1_neg.cc: Likewise.
2097         * testsuite/23_containers/array/debug/front2_neg.cc: Likewise.
2098         * testsuite/23_containers/array/debug/square_brackets_operator1_neg.cc:
2099         Likewise.
2100         * testsuite/23_containers/array/debug/square_brackets_operator2_neg.cc:
2101         Likewise.
2102         * testsuite/23_containers/array/tuple_interface/get_neg.cc:
2103         Adjust dg-error line numbers.
2104         * testsuite/23_containers/deque/cons/clear_allocator.cc: Cast
2105         result to void.
2106         * testsuite/23_containers/deque/debug/invalidation/4.cc:
2107         Likewise.
2108         * testsuite/23_containers/deque/types/1.cc: Use
2109         -Wno-unused-result.
2110         * testsuite/23_containers/list/types/1.cc: Cast result to void.
2111         * testsuite/23_containers/priority_queue/members/7161.cc:
2112         Likewise.
2113         * testsuite/23_containers/queue/members/7157.cc: Likewise.
2114         * testsuite/23_containers/vector/59829.cc: Likewise.
2115         * testsuite/23_containers/vector/ext_pointer/types/1.cc:
2116         Likewise.
2117         * testsuite/23_containers/vector/ext_pointer/types/2.cc:
2118         Likewise.
2119         * testsuite/23_containers/vector/types/1.cc: Use
2120         -Wno-unused-result.
2121
2122 2021-08-04  Jonathan Wakely  <jwakely@redhat.com>
2123
2124         * include/bits/iterator_concepts.h (iter_move): Add
2125         [[nodiscard]].
2126         * include/bits/range_access.h (begin, end, cbegin, cend)
2127         (rbegin, rend, crbegin, crend, size, data, ssize): Likewise.
2128         * include/bits/ranges_base.h (ranges::begin, ranges::end)
2129         (ranges::cbegin, ranges::cend, ranges::rbegin, ranges::rend)
2130         (ranges::crbegin, ranges::crend, ranges::size, ranges::ssize)
2131         (ranges::empty, ranges::data, ranges::cdata): Likewise.
2132         * include/bits/stl_iterator.h (reverse_iterator, __normal_iterator)
2133         (back_insert_iterator, front_insert_iterator, insert_iterator)
2134         (move_iterator, move_sentinel, common_iterator)
2135         (counted_iterator): Likewise.
2136         * include/bits/stl_iterator_base_funcs.h (distance, next, prev):
2137         Likewise.
2138         * include/bits/stream_iterator.h (istream_iterator)
2139         (ostream_iterartor): Likewise.
2140         * include/bits/streambuf_iterator.h (istreambuf_iterator)
2141         (ostreambuf_iterator): Likewise.
2142         * include/std/ranges (views::single, views::iota, views::all)
2143         (views::filter, views::transform, views::take, views::take_while)
2144         (views::drop, views::drop_while, views::join, views::lazy_split)
2145         (views::split, views::counted, views::common, views::reverse)
2146         (views::elements): Likewise.
2147         * testsuite/20_util/rel_ops.cc: Use -Wno-unused-result.
2148         * testsuite/24_iterators/move_iterator/greedy_ops.cc: Likewise.
2149         * testsuite/24_iterators/normal_iterator/greedy_ops.cc:
2150         Likewise.
2151         * testsuite/24_iterators/reverse_iterator/2.cc: Likewise.
2152         * testsuite/24_iterators/reverse_iterator/greedy_ops.cc:
2153         Likewise.
2154         * testsuite/21_strings/basic_string/range_access/char/1.cc:
2155         Cast result to void.
2156         * testsuite/21_strings/basic_string/range_access/wchar_t/1.cc:
2157         Likewise.
2158         * testsuite/21_strings/basic_string_view/range_access/char/1.cc:
2159         Likewise.
2160         * testsuite/21_strings/basic_string_view/range_access/wchar_t/1.cc:
2161         Likewise.
2162         * testsuite/23_containers/array/range_access.cc: Likewise.
2163         * testsuite/23_containers/deque/range_access.cc: Likewise.
2164         * testsuite/23_containers/forward_list/range_access.cc:
2165         Likewise.
2166         * testsuite/23_containers/list/range_access.cc: Likewise.
2167         * testsuite/23_containers/map/range_access.cc: Likewise.
2168         * testsuite/23_containers/multimap/range_access.cc: Likewise.
2169         * testsuite/23_containers/multiset/range_access.cc: Likewise.
2170         * testsuite/23_containers/set/range_access.cc: Likewise.
2171         * testsuite/23_containers/unordered_map/range_access.cc:
2172         Likewise.
2173         * testsuite/23_containers/unordered_multimap/range_access.cc:
2174         Likewise.
2175         * testsuite/23_containers/unordered_multiset/range_access.cc:
2176         Likewise.
2177         * testsuite/23_containers/unordered_set/range_access.cc:
2178         Likewise.
2179         * testsuite/23_containers/vector/range_access.cc: Likewise.
2180         * testsuite/24_iterators/customization_points/iter_move.cc:
2181         Likewise.
2182         * testsuite/24_iterators/istream_iterator/sentinel.cc:
2183         Likewise.
2184         * testsuite/24_iterators/istreambuf_iterator/sentinel.cc:
2185         Likewise.
2186         * testsuite/24_iterators/move_iterator/dr2061.cc: Likewise.
2187         * testsuite/24_iterators/operations/prev_neg.cc: Likewise.
2188         * testsuite/24_iterators/ostreambuf_iterator/2.cc: Likewise.
2189         * testsuite/24_iterators/range_access/range_access.cc:
2190         Likewise.
2191         * testsuite/24_iterators/range_operations/100768.cc: Likewise.
2192         * testsuite/26_numerics/valarray/range_access2.cc: Likewise.
2193         * testsuite/28_regex/range_access.cc: Likewise.
2194         * testsuite/experimental/string_view/range_access/char/1.cc:
2195         Likewise.
2196         * testsuite/experimental/string_view/range_access/wchar_t/1.cc:
2197         Likewise.
2198         * testsuite/ext/vstring/range_access.cc: Likewise.
2199         * testsuite/std/ranges/adaptors/take.cc: Likewise.
2200         * testsuite/std/ranges/p2259.cc: Likewise.
2201
2202 2021-08-03  Jonathan Wakely  <jwakely@redhat.com>
2203
2204         * include/bits/random.tcc (linear_congruential_engine): Do not
2205         define static constexpr members when they are implicitly inline.
2206         * include/std/ratio (ratio, __ratio_multiply, __ratio_divide)
2207         (__ratio_add, __ratio_subtract): Likewise.
2208         * include/std/type_traits (integral_constant): Likewise.
2209         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error
2210         line number.
2211
2212 2021-08-03  Jonathan Wakely  <jwakely@redhat.com>
2213
2214         * testsuite/util/testsuite_common_types.h: Replace uses of
2215         tr1::unordered_map and tr1::unordered_set with their C++11
2216         equivalents.
2217         * testsuite/29_atomics/atomic/cons/assign_neg.cc: Adjust
2218         dg-error line number.
2219         * testsuite/29_atomics/atomic/cons/copy_neg.cc: Likewise.
2220         * testsuite/29_atomics/atomic_integral/cons/assign_neg.cc:
2221         Likewise.
2222         * testsuite/29_atomics/atomic_integral/cons/copy_neg.cc:
2223         Likewise.
2224         * testsuite/29_atomics/atomic_integral/operators/bitwise_neg.cc:
2225         Likewise.
2226         * testsuite/29_atomics/atomic_integral/operators/decrement_neg.cc:
2227         Likewise.
2228         * testsuite/29_atomics/atomic_integral/operators/increment_neg.cc:
2229         Likewise.
2230
2231 2021-08-03  Jonathan Wakely  <jwakely@redhat.com>
2232
2233         * include/std/memory_resource (polymorphic_allocator::delete_object):
2234         Call destructor directly instead of using destroy.
2235         (allocator_traits<polymorphic_allocator<T>>): Define partial
2236         specialization.
2237
2238 2021-08-03  Jonathan Wakely  <jwakely@redhat.com>
2239
2240         * testsuite/20_util/function_objects/binders/3113.cc: Remove
2241         trailing whitespace.
2242         * testsuite/20_util/shared_ptr/assign/auto_ptr.cc: Likewise.
2243         * testsuite/20_util/shared_ptr/assign/auto_ptr_neg.cc: Likewise.
2244         * testsuite/20_util/shared_ptr/assign/auto_ptr_rvalue.cc:
2245         Likewise.
2246         * testsuite/20_util/shared_ptr/creation/dr925.cc: Likewise.
2247         * testsuite/25_algorithms/headers/algorithm/synopsis.cc:
2248         Likewise.
2249         * testsuite/25_algorithms/random_shuffle/requirements/explicit_instantiation/2.cc:
2250         Likewise.
2251         * testsuite/25_algorithms/random_shuffle/requirements/explicit_instantiation/pod.cc:
2252         Likewise.
2253
2254 2021-08-03  Jonathan Wakely  <jwakely@redhat.com>
2255
2256         * doc/xml/manual/evolution.xml: Document deprecation.
2257         * doc/html/*: Regenerate.
2258         * include/bits/c++config (_GLIBCXX14_DEPRECATED): Define.
2259         (_GLIBCXX14_DEPRECATED_SUGGEST): Define.
2260         * include/bits/stl_algo.h (random_shuffle): Deprecate for C++14
2261         and later.
2262         * testsuite/25_algorithms/headers/algorithm/synopsis.cc: Adjust
2263         for C++11 and C++14 changes to std::random_shuffle and
2264         std::shuffle.
2265         * testsuite/25_algorithms/random_shuffle/1.cc: Add options to
2266         use deprecated algorithms.
2267         * testsuite/25_algorithms/random_shuffle/59603.cc: Likewise.
2268         * testsuite/25_algorithms/random_shuffle/moveable.cc: Likewise.
2269         * testsuite/25_algorithms/random_shuffle/requirements/explicit_instantiation/2.cc:
2270         Likewise.
2271         * testsuite/25_algorithms/random_shuffle/requirements/explicit_instantiation/pod.cc:
2272         Likewise.
2273
2274 2021-08-03  Jonathan Wakely  <jwakely@redhat.com>
2275
2276         * testsuite/23_containers/forward_list/operations/3.cc:
2277         Use lambda instead of std::bind2nd.
2278         * testsuite/20_util/function_objects/binders/3113.cc: Add
2279         options for testing deprecated features.
2280         * testsuite/20_util/pair/cons/99957.cc: Likewise.
2281         * testsuite/20_util/shared_ptr/assign/auto_ptr.cc: Likewise.
2282         * testsuite/20_util/shared_ptr/assign/auto_ptr_neg.cc: Likewise.
2283         * testsuite/20_util/shared_ptr/assign/auto_ptr_rvalue.cc:
2284         Likewise.
2285         * testsuite/20_util/shared_ptr/cons/43820_neg.cc: Likewise.
2286         * testsuite/20_util/shared_ptr/cons/auto_ptr.cc: Likewise.
2287         * testsuite/20_util/shared_ptr/cons/auto_ptr_neg.cc: Likewise.
2288         * testsuite/20_util/shared_ptr/creation/dr925.cc: Likewise.
2289         * testsuite/20_util/unique_ptr/cons/auto_ptr.cc: Likewise.
2290         * testsuite/20_util/unique_ptr/cons/auto_ptr_neg.cc: Likewise.
2291         * testsuite/ext/pb_ds/example/priority_queue_erase_if.cc:
2292         Likewise.
2293         * testsuite/ext/pb_ds/example/priority_queue_split_join.cc:
2294         Likewise.
2295         * testsuite/lib/dg-options.exp (dg_add_options_using-deprecated):
2296         New proc.
2297
2298 2021-08-03  Jonathan Wakely  <jwakely@redhat.com>
2299
2300         * include/bits/regex_executor.h (_State_info): Replace
2301         unique_ptr<bool[]> with array of bool.
2302         * include/bits/regex_executor.tcc: Likewise.
2303         * include/bits/regex_scanner.tcc: Replace std::strchr with
2304         __builtin_strchr.
2305         * include/std/regex: Replace standard headers with smaller
2306         internal ones.
2307         * testsuite/28_regex/traits/char/lookup_classname.cc: Include
2308         <string.h> for strlen.
2309         * testsuite/28_regex/traits/char/lookup_collatename.cc:
2310         Likewise.
2311
2312 2021-08-03  Jonathan Wakely  <jwakely@redhat.com>
2313
2314         * include/bits/locale_conv.h (__detail::_Scoped_ptr): Define new
2315         RAII class template.
2316         (wstring_convert, wbuffer_convert): Use __detail::_Scoped_ptr
2317         instead of unique_ptr.
2318
2319 2021-08-02  Patrick Palka  <ppalka@redhat.com>
2320
2321         PR libstdc++/101599
2322         * include/bits/ranges_algo.h (__reverse_copy_fn::operator()):
2323         Add missing std::move in return statement.
2324         (__partition_copy_fn::operator()): Rename templtae parameter
2325         _O2 to _Out2.  Uglify function parameters out_true and out_false.
2326         * include/bits/ranges_algobase.h (__copy_or_move): Add missing
2327         std::move to recursive call that unwraps a __normal_iterator
2328         output iterator.
2329         * testsuite/25_algorithms/copy/constrained.cc (test06): New test.
2330         * testsuite/25_algorithms/move/constrained.cc (test05): New test.
2331
2332 2021-08-02  Patrick Palka  <ppalka@redhat.com>
2333
2334         PR libstdc++/101589
2335         * include/std/ranges (lazy_split_view::_InnerIter::base): Make
2336         the const& overload unconstrained and return a const reference
2337         as per LWG 3533.  Make unconditionally noexcept.
2338         (elements_view::base): Revert accidental r12-569 change.
2339         (elements_view::_Iterator::base): Make the const& overload
2340         unconstrained and return a const reference as per LWG 3533.
2341         Make unconditionally noexcept.
2342
2343 2021-08-02  Patrick Palka  <ppalka@redhat.com>
2344
2345         PR libstdc++/101483
2346         * include/std/ranges (join_view::_Iterator::_Iterator): Add
2347         missing std::move.
2348
2349 2021-08-02  Jonathan Wakely  <jwakely@redhat.com>
2350
2351         PR libstdc++/101709
2352         * src/filesystem/ops-common.h (get_temp_directory_from_env):
2353         Add error_code parameter.
2354         * src/c++17/fs_ops.cc (fs::temp_directory_path): Pass error_code
2355         argument to get_temp_directory_from_env and check it.
2356         * src/filesystem/ops.cc (fs::temp_directory_path): Likewise.
2357
2358 2021-08-02  Jonathan Wakely  <jwakely@redhat.com>
2359
2360         * testsuite/20_util/tuple/comparison_operators/overloaded2.cc:
2361         Add dg-error for c++11_only target.
2362
2363 2021-07-30  Jonathan Wakely  <jwakely@redhat.com>
2364
2365         PR libstdc++/65018
2366         * configure.ac: Check for secure_getenv.
2367         * config.h.in: Regenerate.
2368         * configure: Regenerate.
2369         * src/filesystem/ops-common.h (get_temp_directory_from_env): New
2370         helper function to obtain path from the environment.
2371         * src/c++17/fs_ops.cc (fs::temp_directory_path): Use new helper.
2372         * src/filesystem/ops.cc (fs::temp_directory_path): Likewise.
2373         * testsuite/27_io/filesystem/operations/temp_directory_path.cc:
2374         Print messages if test cannot be run.
2375         * testsuite/experimental/filesystem/operations/temp_directory_path.cc:
2376         Likewise. Fix incorrect condition. Use "TMP" to work with
2377         Windows as well as POSIX.
2378
2379 2021-07-29  Hans-Peter Nilsson  <hp@bitrange.com>
2380
2381         * src/c++17/memory_resource.cc: Use __exchange instead
2382         of std::exchange.
2383
2384 2021-07-27  Jonathan Wakely  <jwakely@redhat.com>
2385
2386         * include/experimental/optional (__throw_bad_optional_access):
2387         Replace GNU attribute with C++11 attribute.
2388         (optional::value, optional::value_or): Use if statements
2389         instead of conditional expressions.
2390         * include/std/optional (__throw_bad_optional_access)
2391         (optional::value, optional::value_or): Likewise.
2392
2393 2021-07-27  Marek Polacek  <polacek@redhat.com>
2394
2395         DR 1512
2396         PR c++/99701
2397         * testsuite/20_util/tuple/comparison_operators/overloaded.cc:
2398         Move a line...
2399         * testsuite/20_util/tuple/comparison_operators/overloaded2.cc:
2400         ...here.  New test.
2401
2402 2021-07-27  Jonathan Wakely  <jwakely@redhat.com>
2403
2404         * include/bits/cow_string.h: Consistently use tab for
2405         indentation.
2406
2407 2021-07-27  Jonathan Wakely  <jwakely@redhat.com>
2408
2409         * include/Makefile.am: Add new header.
2410         * include/Makefile.in: Regenerate.
2411         * include/bits/basic_string.h [!_GLIBCXX_USE_CXX11_ABI]
2412         (basic_string): Move definition of Copy-on-Write string to
2413         new file.
2414         * include/bits/basic_string.tcc: Likewise.
2415         * include/bits/cow_string.h: New file.
2416
2417 2021-07-27  Jonathan Wakely  <jwakely@redhat.com>
2418
2419         * include/std/algorithm: Do not include <utility>.
2420         * include/std/functional: Likewise.
2421         * include/std/regex: Include <bits/stl_pair.h> instead of
2422         <utility>.
2423         * include/debug/map.h: Likewise.
2424         * include/debug/multimap.h: Likewise.
2425         * include/debug/multiset.h: Likewise.
2426         * include/debug/set.h: Likewise.
2427         * include/debug/vector: Likewise.
2428         * include/bits/fs_path.h: Likewise.
2429         * include/bits/unique_ptr.h: Do not include <utility>.
2430         * include/experimental/any: Likewise.
2431         * include/experimental/executor: Likewise.
2432         * include/experimental/memory: Likewise.
2433         * include/experimental/optional: Likewise.
2434         * include/experimental/socket: Use __exchange instead
2435         of std::exchange.
2436         * src/filesystem/ops-common.h: Likewise.
2437         * testsuite/20_util/default_delete/48631_neg.cc: Adjust expected
2438         errors to not use a hardcoded line number.
2439         * testsuite/20_util/default_delete/void_neg.cc: Likewise.
2440         * testsuite/20_util/specialized_algorithms/uninitialized_copy/constrained.cc:
2441         Include <utility> for std::as_const.
2442         * testsuite/20_util/specialized_algorithms/uninitialized_default_construct/constrained.cc:
2443         Likewise.
2444         * testsuite/20_util/specialized_algorithms/uninitialized_move/constrained.cc:
2445         Likewise.
2446         * testsuite/20_util/specialized_algorithms/uninitialized_value_construct/constrained.cc:
2447         Likewise.
2448         * testsuite/23_containers/vector/cons/destructible_debug_neg.cc:
2449         Adjust dg-error line number.
2450
2451 2021-07-27  Jonathan Wakely  <jwakely@redhat.com>
2452
2453         * include/Makefile.am: Add bits/utility.h header.
2454         * include/Makefile.in: Regenerate.
2455         * include/bits/utility.h: New file.
2456         * include/std/utility (tuple_size, tuple_element): Move
2457         to new header.
2458         * include/std/type_traits (__is_tuple_like_impl<tuple<T...>>):
2459         Move to <tuple>.
2460         (_Index_tuple, _Build_index_tuple, integer_sequence): Likewise.
2461         (in_place_t, in_place_index_t, in_place_type_t): Likewise.
2462         * include/bits/ranges_util.h: Include new header instead of
2463         <utility>.
2464         * include/bits/stl_pair.h (tuple_size, tuple_element): Move
2465         partial specializations for std::pair here.
2466         (get): Move overloads for std::pair here.
2467         * include/std/any: Include new header instead of <utility>.
2468         * include/std/array: Likewise.
2469         * include/std/memory_resource: Likewise.
2470         * include/std/optional: Likewise.
2471         * include/std/variant: Likewise.
2472         * include/std/tuple: Likewise.
2473         (__is_tuple_like_impl<tuple<T...>>): Move here.
2474         (get) Declare overloads for std::array.
2475         * include/std/version (__cpp_lib_tuples_by_type): Change type
2476         to long.
2477         * testsuite/20_util/optional/84601.cc: Include <utility>.
2478         * testsuite/20_util/specialized_algorithms/uninitialized_fill/constrained.cc:
2479         Likewise.
2480         * testsuite/23_containers/array/tuple_interface/get_neg.cc:
2481         Adjust dg-error line numbers.
2482         * testsuite/std/ranges/access/cbegin.cc: Include <utility>.
2483         * testsuite/std/ranges/access/cend.cc: Likewise.
2484         * testsuite/std/ranges/access/end.cc: Likewise.
2485         * testsuite/std/ranges/single_view.cc: Likewise.
2486
2487 2021-07-23  Jonathan Wakely  <jwakely@redhat.com>
2488
2489         * include/std/future: Include <bits/atomic_base.h> instead of
2490         <atomic>.
2491
2492 2021-07-23  Jonathan Wakely  <jwakely@redhat.com>
2493
2494         * include/bits/stl_relops.h: Update documentation comments.
2495
2496 2021-07-22  Jonathan Wakely  <jwakely@redhat.com>
2497
2498         PR libstdc++/101583
2499         * include/bits/hashtable.h (_Hashtable): Replace mixin with
2500         _Enable_default_ctor. Construct it explicitly in all
2501         non-forwarding, non-defaulted constructors.
2502         * testsuite/23_containers/unordered_map/cons/default.cc: Check
2503         non-default constructors can be used.
2504         * testsuite/23_containers/unordered_set/cons/default.cc:
2505         Likewise.
2506
2507 2021-07-22  David Edelsohn  <dje.gcc@gmail.com>
2508
2509         * config/os/aix/os_defines.h (__LIBC_NO_CPP_MATH_OVERLOADS__): Define.
2510
2511 2021-07-22  Jonathan Wakely  <jwakely@redhat.com>
2512
2513         PR libstdc++/94295
2514         * include/ext/new_allocator.h (_GLIBCXX_OPERATOR_NEW)
2515         (_GLIBCXX_OPERATOR_DELETE, _GLIBCXX_SIZED_DEALLOC): Define.
2516         (allocator::allocate, allocator::deallocate): Use new macros.
2517
2518 2021-07-22  Jonathan Wakely  <jwakely@redhat.com>
2519
2520         PR libstdc++/101571
2521         * include/bits/ranges_uninitialized.h (_DestroyGuard): Change
2522         constructor parameter to reference and use addressof.
2523         * testsuite/util/testsuite_iterators.h: Define deleted operator&
2524         overloads for test iterators.
2525
2526 2021-07-22  Jonathan Wakely  <jwakely@redhat.com>
2527
2528         * include/bits/std_function.h (_Function_base): Add
2529         default member initializers and define constructor as defaulted.
2530         (function::_M_invoker): Add default member initializer.
2531
2532 2021-07-22  Jonathan Wakely  <jwakely@redhat.com>
2533
2534         PR libstdc++/100682
2535         * doc/xml/manual/debug_mode.xml: Update documentation about
2536         debug capability of std::array.
2537         * doc/html/*: Regenerate.
2538         * include/debug/array: New file.
2539
2540 2021-07-21  Jonathan Wakely  <jwakely@redhat.com>
2541
2542         PR libstdc++/101542
2543         * include/ext/rope (sequence_buffer): Add move constructor and
2544         move assignment operator.
2545         * testsuite/ext/rope/101542.cc: New test.
2546
2547 2021-07-20  Jonathan Wakely  <jwakely@redhat.com>
2548
2549         PR libstdc++/101510
2550         * src/c++17/fs_ops.cc (fs::create_directories): Use status
2551         instead of symlink_status.
2552         * src/filesystem/ops.cc (fs::create_directories): Likewise.
2553         * testsuite/27_io/filesystem/operations/create_directories.cc:
2554         Check symlink to existing directory.
2555         * testsuite/27_io/filesystem/operations/create_directory.cc: Do
2556         not test with symlinks on Windows.
2557         * testsuite/experimental/filesystem/operations/create_directories.cc:
2558         Check symlink to existing directory.
2559         * testsuite/experimental/filesystem/operations/create_directory.cc:
2560         Do not test with symlinks on Windows.
2561
2562 2021-07-20  Jonathan Wakely  <jwakely@redhat.com>
2563
2564         PR libstdc++/100863
2565         * include/bits/hashtable.h (_Hashtable): Conditionally delete
2566         default constructor by deriving from _Enable_special_members.
2567         * testsuite/23_containers/unordered_map/cons/default.cc: New test.
2568         * testsuite/23_containers/unordered_set/cons/default.cc: New test.
2569
2570 2021-07-20  Jonathan Wakely  <jwakely@redhat.com>
2571
2572         PR libstdc++/101510
2573         * src/c++17/fs_ops.cc (create_dir): Adjust whitespace.
2574         * testsuite/27_io/filesystem/operations/create_directory.cc:
2575         Test creating directory with name of existing symlink to
2576         directory.
2577         * testsuite/experimental/filesystem/operations/create_directory.cc:
2578         Likewise.
2579
2580 2021-07-16  Jonathan Wakely  <jwakely@redhat.com>
2581
2582         * include/std/tuple (get<I>): Add deleted overload for bad
2583         index.
2584         * testsuite/20_util/tuple/element_access/get_neg.cc: Adjust
2585         expected errors.
2586
2587 2021-07-16  Jonathan Wakely  <jwakely@redhat.com>
2588
2589         * include/bits/max_size_type.h (numeric_limits<__max_size_type>):
2590         Use __int_traits unconditionally.
2591
2592 2021-07-16  Jonathan Wakely  <jwakely@redhat.com>
2593
2594         * include/bits/random.h (_Shift::__value): Use constexpr.
2595         (_Select_uint_least_t::type): Use using-declaration.
2596         (_Mod): Likewise.
2597         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error
2598         line number.
2599
2600 2021-07-16  Jonathan Wakely  <jwakely@redhat.com>
2601
2602         * include/bits/cpp_type_traits.h (__INT_N): Use __extension__
2603         instead of diagnostic pragmas.
2604         * include/bits/functional_hash.h: Likewise.
2605         * include/bits/iterator_concepts.h (__is_signed_int128)
2606         (__is_unsigned_int128): Likewise.
2607         * include/bits/max_size_type.h (__max_size_type): Likewise.
2608         (numeric_limits<__max_size_type>): Likewise.
2609         * include/bits/std_abs.h (abs): Likewise.
2610         * include/bits/stl_algobase.h (__size_to_integer): Likewise.
2611         * include/bits/uniform_int_dist.h (uniform_int_distribution):
2612         Likewise.
2613         * include/ext/numeric_traits.h (_GLIBCXX_INT_N_TRAITS):
2614         Likewise.
2615         * include/std/type_traits (__is_integral_helper<INT_N>)
2616         (__is_signed_integer, __is_unsigned_integer)
2617         (__make_unsigned<INT_N>, __make_signed<INT_N>): Likewise.
2618         * include/std/limits (__INT_N): Add __extension__ keyword.
2619         * include/bits/random.h (_Select_uint_least_t)
2620         (random_device): Likewise.
2621
2622 2021-07-16  Patrick Palka  <ppalka@redhat.com>
2623
2624         PR libstdc++/101231
2625         * include/std/ranges (_CachedPosition::_M_get): For non-forward
2626         ranges, just call __builtin_unreachable.
2627         * testsuite/std/ranges/istream_view.cc (test05): New test.
2628
2629 2021-07-16  Patrick Palka  <ppalka@redhat.com>
2630
2631         PR libstdc++/101214
2632         * include/std/ranges (split_view::split_view): Use std::move.
2633         (split_view::_Iterator::_Iterator): Remove redundant
2634         default_initializable constraint.
2635         (split_view::_Sentinel::_Sentinel): Declare.
2636         * testsuite/std/ranges/adaptors/split.cc (test02): New test.
2637
2638 2021-07-16  Marek Polacek  <polacek@redhat.com>
2639
2640         * testsuite/20_util/ratio/operations/ops_overflow_neg.cc: Add
2641         dg-error.
2642
2643 2021-07-16  Jonathan Wakely  <jwakely@redhat.com>
2644
2645         * include/bits/unique_ptr.h: Adjust doxygen markup.
2646
2647 2021-07-16  Jonathan Wakely  <jwakely@redhat.com>
2648
2649         PR libstdc++/101307
2650         * include/std/type_traits: Adjust doxygen markup.
2651
2652 2021-07-16  Jonathan Wakely  <jwakely@redhat.com>
2653
2654         * include/bits/cpp_type_traits.h: Add diagnostic pragmas around
2655         uses of non-standard integer types.
2656         * include/bits/functional_hash.h: Likewise.
2657         * include/bits/iterator_concepts.h: Likewise.
2658         * include/bits/max_size_type.h: Likewise.
2659         * include/bits/std_abs.h: Likewise.
2660         * include/bits/stl_algobase.h: Likewise.
2661         * include/bits/uniform_int_dist.h: Likewise.
2662         * include/ext/numeric_traits.h: Likewise.
2663         * include/std/type_traits: Likewise.
2664
2665 2021-07-15  Jonathan Wakely  <jwakely@redhat.com>
2666
2667         PR libstdc++/101427
2668         * include/std/tuple (tuple_element): Improve static_assert text.
2669         (__get_helper): Add deleted overload.
2670         (get<i>(tuple<T...>&&), get<i>(const tuple<T...>&&)): Use
2671         __get_helper directly.
2672         (__get_helper2): Remove.
2673         (__find_uniq_type_in_pack): New constexpr helper function.
2674         (get<T>): Use __find_uniq_type_in_pack and __get_helper instead
2675         of __get_helper2.
2676         * testsuite/20_util/tuple/element_access/get_neg.cc: Adjust
2677         expected errors.
2678         * testsuite/20_util/tuple/element_access/101427.cc: New test.
2679
2680 2021-07-15  Jonathan Wakely  <jwakely@redhat.com>
2681
2682         PR libstdc++/101429
2683         * include/bits/c++config (__replacement_assert): Add noexcept.
2684         [!_GLIBCXX_VERBOSE] (__glibcxx_assert_impl): Use __builtin_abort
2685         instead of __replacement_assert.
2686
2687 2021-07-14  Jonathan Wakely  <jwakely@redhat.com>
2688
2689         * include/std/string_view (basic_string_view(It, End)): Add
2690         noexcept-specifier.
2691         * testsuite/21_strings/basic_string_view/cons/char/range.cc:
2692         Check noexcept-specifier. Also check construction without CTAD.
2693
2694 2021-07-13  Jonathan Wakely  <jwakely@redhat.com>
2695
2696         PR c++/101361
2697         * include/std/string_view (ends_with): Use traits_type::compare
2698         directly.
2699
2700 2021-07-13  Jonathan Wakely  <jwakely@redhat.com>
2701
2702         * include/std/string_view: Only include <bits/ranges_base.h>
2703         once, and only for C++20 and later.
2704
2705 2021-07-12  Jonathan Wakely  <jwakely@redhat.com>
2706
2707         PR libstdc++/101411
2708         * include/std/span (as_writable_bytes): Add requires-clause.
2709         * testsuite/23_containers/span/101411.cc: New test.
2710
2711 2021-07-09  Matheus Castanho  <msc@linux.ibm.com>
2712
2713         * include/std/mutex (__lock_impl): Check
2714         _GLIBCXX_HAS_GTHREADS before using __gthread_yield.
2715
2716 2021-07-02  Jonathan Wakely  <jwakely@redhat.com>
2717
2718         PR libstdc++/101271
2719         * include/bits/unique_ptr.h (unique_ptr<T[],D>::operator[]):
2720         Remove noexcept-specifier.
2721         (unique_ptr<T[],D>::_S_nothrow_deref): Remove.
2722         * testsuite/20_util/unique_ptr/lwg2762.cc: Remove checks for
2723         operator[].
2724
2725 2021-07-01  Jonathan Wakely  <jwakely@redhat.com>
2726
2727         * doc/doxygen/doxygroups.cc: Fix docs for std::literals.
2728         * doc/doxygen/user.cfg.in: Exclude the Networking TS header.
2729         Add some more predefined macros.
2730         * include/bits/fs_fwd.h: Move @addtogroup commands inside
2731         namespaces. Add better documentation.
2732         * include/bits/fs_path.h: Likewise.
2733         * include/experimental/bits/fs_fwd.h: Likewise.
2734         * include/experimental/bits/fs_path.h: Likewise.
2735         * include/ext/throw_allocator.h: Fix typo and improve docs.
2736         * include/std/chrono: Move @addtogroup commands.
2737         * include/std/system_error: Move @addtogroup commands.
2738         * libsupc++/exception: Improve documentation.
2739         * libsupc++/exception.h: Add @since documentation.
2740
2741 2021-06-30  Jonathan Wakely  <jwakely@redhat.com>
2742
2743         PR libstdc++/101258
2744         * doc/doxygen/user.cfg.in (INPUT): Add <experimental/simd>.
2745         (COLS_IN_ALPHA_INDEX): Remove obsolete tag.
2746         (PREDEFINED): Add/fix some more macros that need to be expanded.
2747         * include/bits/random.h: Stop Doxygen from documenting internal
2748         implementation details.
2749         * include/bits/random.tcc: Likewise.
2750         * include/bits/this_thread_sleep.h: Fix @file name.
2751         * include/experimental/bits/simd.h: Add to Doxygen group. Do not
2752         document internal implementation details.
2753         * include/experimental/bits/simd_detail.h: Do not document
2754         internal implementation details.
2755         * include/experimental/simd: Define Doxygen groups.
2756         * include/experimental/type_traits: Improve documentation for
2757         the header file. Define groups. Use @since commands.
2758         * include/std/scoped_allocator (scoped_allocator_adaptor): Move
2759         declaration before undocumented region.
2760         * include/std/type_traits (true_type, false_type): Use using
2761         declaration instead of typedef.
2762         (is_invocable_v, is_nothrow_invocable_v, is_invocable_r_v)
2763         (is_nothrow_invocable_r_v): Move definitions next to other C++17
2764         variable templates.
2765         Do not document internal implementation details. Move misplaced
2766         group-end command. Define group for variable templates.
2767         * include/std/variant: Do not document internal implementation
2768         details.
2769         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error
2770         line number.
2771
2772 2021-06-30  Jonathan Wakely  <jwakely@redhat.com>
2773
2774         * include/experimental/simd: Do not define anything pre-C++17.
2775
2776 2021-06-30  Jonathan Wakely  <jwakely@redhat.com>
2777
2778         * include/bits/random.tcc [__cpp_inline_variables]: Remove
2779         redundant definitions of static constexpr member variables.
2780         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error
2781         line number.
2782
2783 2021-06-28  Jonathan Wakely  <jwakely@redhat.com>
2784
2785         * include/bits/streambuf.tcc (__copy_streambufs_eof): Remove
2786         explicit instantiation declarations.
2787         * src/c++11/streambuf-inst.cc (__copy_streambufs_eof): Remove
2788         explicit instantiation definitions.
2789
2790 2021-06-28  Jonathan Wakely  <jwakely@redhat.com>
2791
2792         PR libstdc++/97088
2793         * testsuite/17_intro/names.cc: Fix #if condition for names used
2794         by newlib headers.
2795
2796 2021-06-28  Jonathan Wakely  <jwakely@redhat.com>
2797
2798         PR libstdc++/101236
2799         * include/bits/unique_ptr.h (unique_ptr<T[], D>::operator[]):
2800         Fail gracefully if element_type is incomplete.
2801         * testsuite/20_util/unique_ptr/cons/incomplete.cc: Clarify that
2802         the standard doesn't require this test to work for array types.
2803         * testsuite/20_util/unique_ptr/lwg2762.cc: Check that incomplete
2804         types can be used with array specialization.
2805         * testsuite/20_util/unique_ptr/101236.cc: New test.
2806
2807 2021-06-28  Jonathan Wakely  <jwakely@redhat.com>
2808
2809         * doc/xml/manual/intro.xml: Document LWG 415 change.
2810         * doc/html/manual/bugs.html: Regenerate.
2811         * include/bits/istream.tcc (ws): Create sentry and catch
2812         exceptions.
2813         * testsuite/27_io/basic_istream/ws/char/lwg415.cc: New test.
2814         * testsuite/27_io/basic_istream/ws/wchar_t/lwg415.cc: New test.
2815
2816 2021-06-25  Jonathan Wakely  <jwakely@redhat.com>
2817
2818         * include/bits/ostream.tcc (basic_ostream::write): Call sputn
2819         directly instead of using _M_write. Do setstate(__err) all
2820         outside the try-catch block.
2821         * include/std/ostream (basic_ostream::_M_write): Declare
2822         private. Use __ostream_insert. Do not define for the versioned
2823         namespace.
2824
2825 2021-06-25  Jonathan Wakely  <jwakely@redhat.com>
2826
2827         * doc/xml/manual/intro.xml: Document LWG 581 change.
2828         * doc/html/manual/bugs.html: Regenerate.
2829         * include/bits/basic_ios.tcc: Whitespace.
2830         * include/bits/ostream.tcc (basic_ostream::flush()): Construct
2831         sentry.
2832         * testsuite/27_io/basic_ostream/flush/char/2.cc: Check
2833         additional cases.
2834         * testsuite/27_io/basic_ostream/flush/char/exceptions_badbit_throw.cc:
2835         Likewise.
2836         * testsuite/27_io/basic_ostream/flush/wchar_t/2.cc: Likewise.
2837         * testsuite/27_io/basic_ostream/flush/wchar_t/exceptions_badbit_throw.cc:
2838         Likewise.
2839
2840 2021-06-25  Jonathan Wakely  <jwakely@redhat.com>
2841
2842         * include/bits/ostream.tcc (sentry): Only set failbit if badbit
2843         is set, not if eofbit is set.
2844         (tellp, seekp, seekp): Create sentry object. Do not set badbit
2845         on exceptions.
2846         * testsuite/27_io/basic_ostream/seekp/char/exceptions_badbit_throw.cc:
2847         Adjust expected behaviour.
2848         * testsuite/27_io/basic_ostream/seekp/wchar_t/exceptions_badbit_throw.cc:
2849         Likewise.
2850         * testsuite/27_io/basic_ostream/tellp/char/exceptions_badbit_throw.cc:
2851         Likewise.
2852         * testsuite/27_io/basic_ostream/tellp/wchar_t/exceptions_badbit_throw.cc:
2853         Likewise.
2854         * testsuite/27_io/basic_ostream/seekp/char/n3168.cc: New test.
2855         * testsuite/27_io/basic_ostream/seekp/wchar_t/n3168.cc: New test.
2856         * testsuite/27_io/basic_ostream/tellp/char/n3168.cc: New test.
2857         * testsuite/27_io/basic_ostream/tellp/wchar_t/n3168.cc: New test.
2858
2859 2021-06-25  Jonathan Wakely  <jwakely@redhat.com>
2860
2861         * include/std/syncstream (basic_syncbuf::swap()): Remove
2862         noexcept, as per LWG 3498.
2863
2864 2021-06-25  Jonathan Wakely  <jwakely@redhat.com>
2865
2866         PR libstdc++/97088
2867         * testsuite/17_intro/names.cc: Undef more names for newlib and
2868         also for arm-none-linux-gnueabi.
2869         * testsuite/experimental/names.cc: Disable PCH.
2870
2871 2021-06-25  Matthias Kretz  <m.kretz@gsi.de>
2872
2873         * include/experimental/bits/simd.h (__bit_cast): Implement via
2874         __builtin_bit_cast #if available.
2875         (__proposed::simd_bit_cast): Add overloads for simd and
2876         simd_mask, which use __builtin_bit_cast (or __bit_cast #if not
2877         available), which return an object of the requested type with
2878         the same bits as the argument.
2879         * include/experimental/bits/simd_math.h: Use simd_bit_cast
2880         instead of __bit_cast to allow casts to fixed_size_simd.
2881         (copysign): Remove branch that was only required if __bit_cast
2882         cannot be constexpr.
2883         * testsuite/experimental/simd/tests/bits/test_values.h: Switch
2884         from __bit_cast to __proposed::simd_bit_cast since the former
2885         will not cast fixed_size objects anymore.
2886
2887 2021-06-24  Matthias Kretz  <m.kretz@gsi.de>
2888
2889         * include/experimental/bits/simd_math.h
2890         (_GLIBCXX_SIMD_MATH_CALL2_): Rename arg2_ to __arg2.
2891         (_GLIBCXX_SIMD_MATH_CALL3_): Rename arg2_ to __arg2 and arg3_ to
2892         __arg3.
2893
2894 2021-06-24  Matthias Kretz  <m.kretz@gsi.de>
2895
2896         * include/experimental/bits/simd.h (__execute_on_index_sequence)
2897         (__execute_on_index_sequence_with_return)
2898         (__call_with_n_evaluations, __call_with_subscripts): Add flatten
2899         attribute.
2900
2901 2021-06-24  Matthias Kretz  <m.kretz@gsi.de>
2902
2903         * include/experimental/bits/simd_x86.h (_S_trunc, _S_floor)
2904         (_S_ceil): Set bit 8 (_MM_FROUND_NO_EXC) on AVX and SSE4.1
2905         roundp[sd] calls.
2906
2907 2021-06-24  Matthias Kretz  <m.kretz@gsi.de>
2908
2909         * include/experimental/bits/simd_x86.h (_S_ldexp): The AVX512F
2910         implementation doesn't require a _VecBltnBtmsk ABI tag, it
2911         requires either a 64-Byte input (in which case AVX512F must be
2912         available) or AVX512VL.
2913
2914 2021-06-24  Matthias Kretz  <m.kretz@gsi.de>
2915
2916         * include/experimental/bits/simd_math.h: Undefine internal
2917         macros after use.
2918         (frexp): Move #if to a more sensible position and reformat
2919         preceding code.
2920         (logb): Call _SimdImpl::_S_logb for fixed_size instead of
2921         duplicating the code here.
2922         (modf): Simplify condition.
2923
2924 2021-06-24  Matthias Kretz  <m.kretz@gsi.de>
2925
2926         * include/experimental/bits/simd_math.h (fabs): Remove
2927         fabs(simd<integral>) overload.
2928
2929 2021-06-24  Matthias Kretz  <m.kretz@gsi.de>
2930
2931         * include/experimental/bits/simd_converter.h
2932         (_SimdConverter::operator()): Pass _SimdTuple by const-ref.
2933         * include/experimental/bits/simd_fixed_size.h
2934         (_GLIBCXX_SIMD_FIXED_OP): Pass binary operator _SimdTuple
2935         arguments by const-ref.
2936         (_S_masked_unary): Pass _SimdTuple by const-ref.
2937
2938 2021-06-24  Matthias Kretz  <m.kretz@gsi.de>
2939
2940         * include/experimental/bits/simd_fixed_size.h
2941         (_AbisInSimdTuple): Removed.
2942
2943 2021-06-24  Matthias Kretz  <m.kretz@gsi.de>
2944
2945         * include/experimental/bits/simd.h: Add missing operator~
2946         overload for simd<floating-point> to __float_bitwise_operators.
2947         * include/experimental/bits/simd_builtin.h
2948         (_SimdImplBuiltin::_S_complement): Bitcast to int (and back) to
2949         implement complement for floating-point vectors.
2950         * include/experimental/bits/simd_fixed_size.h
2951         (_SimdImplFixedSize::_S_copysign): New function, forwarding to
2952         copysign implementation of _SimdTuple members.
2953         * include/experimental/bits/simd_math.h (copysign): Call
2954         _SimdImpl::_S_copysign for fixed_size arguments. Simplify
2955         generic copysign implementation using the new ~ operator.
2956
2957 2021-06-24  Jonathan Wakely  <jwakely@redhat.com>
2958
2959         * testsuite/experimental/simd/README.md: Fix typos.
2960
2961 2021-06-24  Jonathan Wakely  <jwakely@redhat.com>
2962
2963         * include/bits/shared_ptr_base.h (__shared_ptr_access::operator[]):
2964         Add noexcept.
2965         * include/bits/unique_ptr.h (unique_ptr::operator*): Add
2966         conditional noexcept as per LWG 2762.
2967         * testsuite/20_util/shared_ptr/observers/array.cc: Check that
2968         dereferencing cannot throw.
2969         * testsuite/20_util/shared_ptr/observers/get.cc: Likewise.
2970         * testsuite/20_util/optional/observers/lwg2762.cc: New test.
2971         * testsuite/20_util/unique_ptr/lwg2762.cc: New test.
2972
2973 2021-06-23  Patrick Palka  <ppalka@redhat.com>
2974
2975         PR c++/101174
2976         * testsuite/23_containers/multiset/cons/deduction.cc:
2977         Uncomment CTAD example that was rejected by this bug.
2978         * testsuite/23_containers/set/cons/deduction.cc: Likewise.
2979
2980 2021-06-23  Jonathan Wakely  <jwakely@redhat.com>
2981
2982         * include/std/chrono (chrono::year::is_leap()): Fix incorrect
2983         logic in comment.
2984
2985 2021-06-23  Matthias Kretz  <m.kretz@gsi.de>
2986
2987         * testsuite/experimental/simd/README.md: New file.
2988
2989 2021-06-23  Matthias Kretz  <m.kretz@gsi.de>
2990
2991         * testsuite/experimental/simd/driver.sh: Rewrite output
2992         verbosity logic. Add -p/--percentage option. Allow -v/--verbose
2993         to be used twice. Add -x and -o short options. Parse long
2994         options with = instead of separating space generically. Parce
2995         contracted short options. Make unrecognized options an error.
2996         If same-line output is active, trap on EXIT to increment the
2997         progress (only with --percentage), erase the line and print the
2998         current status.
2999         * testsuite/experimental/simd/generate_makefile.sh: Initialize
3000         helper files for progress account keeping. Update help target
3001         for changes to DRIVEROPTS.
3002
3003 2021-06-23  Matthias Kretz  <m.kretz@gsi.de>
3004
3005         * testsuite/Makefile.am (check-simd): Remove -fno-tree-vrp flag
3006         and associated warning.
3007         * testsuite/Makefile.in: Regenerate.
3008
3009 2021-06-23  Cassio Neri  <cassio.neri@gmail.com>
3010             Jonathan Wakely  <jwakely@redhat.com>
3011             Ulrich Drepper  <drepper@redhat.com>
3012
3013         * include/std/chrono (chrono::year::is_leap()): Optimize.
3014
3015 2021-06-23  Patrick Palka  <ppalka@redhat.com>
3016
3017         PR c++/86439
3018         * testsuite/23_containers/map/cons/deduction.cc: Replace ambiguous
3019         CTAD examples.
3020         * testsuite/23_containers/multimap/cons/deduction.cc: Likewise.
3021         * testsuite/23_containers/multiset/cons/deduction.cc: Likewise.
3022         Mention one of the replaced examples is broken due to PR101174.
3023         * testsuite/23_containers/set/cons/deduction.cc: Likewise.
3024         * testsuite/23_containers/unordered_map/cons/deduction.cc: Replace
3025         ambiguous CTAD examples.
3026         * testsuite/23_containers/unordered_multimap/cons/deduction.cc:
3027         Likewise.
3028         * testsuite/23_containers/unordered_multiset/cons/deduction.cc:
3029         Likewise.
3030         * testsuite/23_containers/unordered_set/cons/deduction.cc: Likewise.
3031
3032 2021-06-23  Jonathan Wakely  <jwakely@redhat.com>
3033
3034         * include/std/mutex (__detail::__try_lock_impl): Rename
3035         parameter to avoid clashing with newlib's __lockable macro.
3036         (try_lock): Add 'inline' specifier.
3037         * testsuite/17_intro/names.cc: Add check for __lockable.
3038         * testsuite/30_threads/try_lock/5.cc: Add options for pthreads.
3039
3040 2021-06-22  Jonathan Wakely  <jwakely@redhat.com>
3041             Matthias Kretz  <m.kretz@gsi.de>
3042
3043         * include/std/mutex (lock): Replace recursion with iteration
3044         when lockables all have the same type.
3045         (__detail::__try_lock_impl): Likewise. Pass lockables as
3046         parameters, instead of a tuple. Always lock the first one, and
3047         recurse for the rest.
3048         (__detail::__lock_impl): Adjust call to __try_lock_impl.
3049         (__detail::__try_to_lock): Remove.
3050         * testsuite/30_threads/lock/3.cc: Check that mutexes are locked.
3051         * testsuite/30_threads/lock/4.cc: Also test non-heterogeneous
3052         arguments.
3053         * testsuite/30_threads/unique_lock/cons/60497.cc: Also check
3054         std::try_lock.
3055         * testsuite/30_threads/try_lock/5.cc: New test.
3056
3057 2021-06-22  Jonathan Wakely  <jwakely@redhat.com>
3058
3059         * include/std/memory (declare_reachable, undeclare_reachable)
3060         (declare_no_pointers, undeclare_no_pointers, get_pointer_safety)
3061         (pointer_safety): Only define for C++11 to C++20 inclusive.
3062         * testsuite/20_util/pointer_safety/1.cc: Do not run for C++23.
3063
3064 2021-06-22  Jonathan Wakely  <jwakely@redhat.com>
3065
3066         * include/bits/random.h (seed_seq): Constrain initializer-list
3067         constructor.
3068         * include/bits/random.tcc (seed_seq): Add template parameter.
3069         * testsuite/26_numerics/random/seed_seq/cons/default.cc: Check
3070         for noexcept.
3071         * testsuite/26_numerics/random/seed_seq/cons/initlist.cc: Check
3072         constraints.
3073
3074 2021-06-22  Thomas Rodgers  <rodgert@appliantology.com>
3075
3076         PR libstdc++/100806
3077         * include/bits/semaphore_base.h (__atomic_semaphore::_M_release):
3078         Force _M_release() to wake all waiting threads.
3079         * testsuite/30_threads/semaphore/100806.cc: New test.
3080
3081 2021-06-21  Jonathan Wakely  <jwakely@redhat.com>
3082
3083         * include/std/mutex (__try_to_lock): Move to __detail namespace.
3084         (struct __try_lock_impl): Replace with ...
3085         (__detail::__try_lock_impl<Idx>(tuple<Lockables...>&)): New
3086         function templates to implement std::try_lock.
3087         (try_lock): Use new __try_lock_impl.
3088         (__detail::__lock_impl(int, int&, L0&, L1&...)): New function
3089         template to implement std::lock.
3090         (lock): Use __lock_impl.
3091
3092 2021-06-21  Patrick Palka  <ppalka@redhat.com>
3093
3094         * include/bits/ranges_cmp.h (__cpp_lib_ranges): Adjust value.
3095
3096 2021-06-20  Patrick Palka  <ppalka@redhat.com>
3097
3098         * include/std/ranges (__non_propagating_cache::operator bool):
3099         Define for split_view::begin().
3100         (split_view): Define as per P2210.
3101         (views::__detail::__can_split_view): Define.
3102         (views::_Split, views::split): Define.
3103         * testsuite/std/ranges/adaptors/100577.cc (test01, test02):
3104         Test views::split.
3105         * testsuite/std/ranges/adaptors/split.cc: New test.
3106         * testsuite/std/ranges/p2325.cc (test08a): New test.
3107         * testsuite/std/ranges/p2367.cc (test01): Test views::split.
3108
3109 2021-06-20  Patrick Palka  <ppalka@redhat.com>
3110
3111         * include/std/ranges: Rename views::split to views::lazy_split,
3112         split_view to lazy_split_view, etc. throughout.
3113         * testsuite/std/ranges/*: Likewise.
3114         * testsuite/std/ranges/adaptors/lazy_split.cc: New file.
3115         * testsuite/std/ranges/adaptors/lazy_split_neg.cc: New file.
3116
3117 2021-06-20  Patrick Palka  <ppalka@redhat.com>
3118
3119         * include/std/ranges (split_view::_OuterIter::__at_end):
3120         Check _M_trailing_empty.
3121         (split_view::_OuterIter::_M_trailing_empty): Define this
3122         data member.
3123         (split_view::_OuterIter::operator++): Set _M_trailing_empty
3124         appropriately.
3125         (split_view::_OuterIter::operator==): Compare
3126         _M_trailing_empty.
3127         * testsuite/std/ranges/adaptors/100479.cc (test03): Expect two
3128         split parts instead of one.
3129         * testsuite/std/ranges/adaptors/split.cc (test11): New test.
3130
3131 2021-06-20  Patrick Palka  <ppalka@redhat.com>
3132
3133         * include/std/ranges (split_view::_InnerIter::base): Define as
3134         per P2210.
3135
3136 2021-06-19  Patrick Palka  <ppalka@redhat.com>
3137
3138         * include/std/ranges (transform_view::_Iterator::_S_iter_concept):
3139         Consider _Base instead of _Vp as per LWG 3555.
3140         (elements_view::_Iterator::_S_iter_concept): Likewise.
3141
3142 2021-06-19  Patrick Palka  <ppalka@redhat.com>
3143
3144         * include/std/ranges (split_view::_OuterIter::value_type::begin):
3145         Remove the non-const overload, and remove the copyable constraint
3146         on the const overload as per LWG 3553.
3147
3148 2021-06-19  Patrick Palka  <ppalka@redhat.com>
3149
3150         * include/bits/stl_iterator.h
3151         (__detail::__common_iter_use_postfix_proxy): Add
3152         move_constructible constraint as per LWG 3546.
3153         (common_iterator::__postfix_proxy): Adjust initializer of
3154         _M_keep as per LWG 3546.
3155
3156 2021-06-18  Patrick Palka  <ppalka@redhat.com>
3157
3158         PR libstdc++/100387
3159         * include/bits/ranges_algo.h (__minmax_fn::operator()): Rewrite
3160         to limit comparison complexity to 3*N/2.
3161         (__minmax_element_fn::operator()): Likewise.
3162         (shift_right): Avoid premature std::move of __result.
3163         * testsuite/25_algorithms/minmax/constrained.cc (test04, test05):
3164         New tests.
3165         * testsuite/25_algorithms/minmax_element/constrained.cc (test02):
3166         Likewise.
3167
3168 2021-06-18  Patrick Palka  <ppalka@redhat.com>
3169
3170         * include/std/concepts (convertible_to): Just use declval as per
3171         LWG 3557.
3172
3173 2021-06-18  Jonathan Wakely  <jwakely@redhat.com>
3174
3175         PR libstdc++/95833
3176         * include/std/numeric (reduce(Iter, Iter, T, BinaryOp)): Replace
3177         incorrect static_assert with ones matching the 'Mandates'
3178         conditions in the standard.
3179         * testsuite/26_numerics/reduce/95833.cc: New test.
3180
3181 2021-06-18  Jonathan Wakely  <jwakely@redhat.com>
3182
3183         * testsuite/21_strings/basic_string/cons/char/1.cc: Use
3184         diagnostic pragma to suppress -Wstringop-overread error.
3185
3186 2021-06-18  Patrick Palka  <ppalka@redhat.com>
3187
3188         * include/bits/ranges_algo.h (__find_fn, find, __find_if_fn)
3189         (find_if, __find_if_not_fn, find_if_not, _in_in_result)
3190         (__mismatch_fn, mismatch, __search_fn, search): Move to ...
3191         * include/bits/ranges_util.h: ... here.
3192         * include/std/ranges (__detail::find, __detail::find_if)
3193         (__detail::find_if_not, __detail::mismatch): Remove.
3194         (filter_view): Use ranges::find_if instead.
3195         (drop_while_view): Use ranges::find_if_not instead.
3196         (split_view): Use ranges::find and ranges::mismatch instead.
3197
3198 2021-06-18  Patrick Palka  <ppalka@redhat.com>
3199
3200         * include/bits/iterator_concepts.h (weakly_incrementable): Remove
3201         default_initializable requirement.
3202         * include/bits/ranges_base.h (ranges::view): Likewise.
3203         * include/bits/ranges_util.h (subrange): Constrain the default
3204         ctor.
3205         * include/bits/stl_iterator.h (back_insert_iterator): Remove the
3206         default ctor.
3207         (front_insert_iterator): Likewise.
3208         (insert_iterator): Likewise.  Remove NSDMIs.
3209         (common_iterator): Constrain the default ctor.
3210         (counted_iterator): Likewise.
3211         * include/bits/stream_iterator.h (ostream_iterator): Remove the
3212         default ctor.
3213         * include/std/ranges (__detail::__box::operator=): Handle
3214         self-assignment in the primary template.
3215         (__detail::__box): In the partial specialization: adjust
3216         constraints as per P2325.  Add specialized operator= for the
3217         case when the wrapped type is not copyable.  Constrain the
3218         default ctor.  Avoid list-initialization.
3219         (single_view): Constraint the default ctor.
3220         (iota_view): Relax semiregular constraint to copyable.
3221         Constrain the default ctor.
3222         (iota_view::_Iterator): Constraint the default ctor.
3223         (basic_istream_view): Remove the default ctor.  Remove NSDMIs.
3224         Remove redundant checks for empty _M_stream.
3225         (basic_istream_view::_Iterator): Likewise.
3226         (ref_view): Remove the default ctor.  Remove NSDMIs.
3227         (ref_view::_Iterator): Constrain the default ctor.
3228         (__detail::__non_propagating_cache::operator=): Define overload
3229         for assigning from a value of the underlying type.
3230         (filter_view): Likewise.
3231         (filter_view::_Iterator): Likewise.
3232         (transform_view): Likewise.
3233         (transform_view::_Iterator): Likewise.
3234         (take_view): Likewise.
3235         (take_view::_Iterator): Likewise.
3236         (take_while_view): Likewise.
3237         (take_while_view::_Iterator): Likewise.
3238         (drop_while_view): Likewise.
3239         (drop_while_view::_Iterator): Likewise.
3240         (join_view): Likewise.
3241         (split_view::_OuterIter::__current): Adjust after changing the
3242         type of _M_current.
3243         (split_view::_M_current): Wrap it in a __non_propagating_cache.
3244         (split_view::split_view): Constrain the default ctor.
3245         (common_view): Constrain the default ctor.
3246         (reverse_view): Likewise.
3247         (elements_view): Likewise.
3248         * include/std/span (enable_view<span<_ElementType, _Extent>>):
3249         Define this partial specialization to true unconditionally.
3250         * include/std/version (__cpp_lib_ranges): Adjust value.
3251         * testsuite/24_iterators/back_insert_iterator/constexpr.cc:
3252         Don't attempt to default construct a back_insert_iterator.
3253         * testsuite/24_iterators/front_insert_iterator/constexpr.cc:
3254         Don't attempt to default construct a front_insert_iterator.
3255         * testsuite/24_iterators/insert_iterator/constexpr.cc:
3256         Don't attempt to default construct an insert_iterator.
3257         * testsuite/24_iterators/ostream_iterator/requirements/constexpr.cc:
3258         Remove this test for default constructibility of ostream_iterator.
3259         * testsuite/std/ranges/97600.cc: Don't attempt to default
3260         construct a basic_istream_view.
3261         * testsuite/std/ranges/adaptors/detail/semiregular_box.cc:
3262         Rename to ...
3263         * testsuite/std/ranges/adaptors/detail/copyable_box.cc: ... this.
3264         (test02): Adjust now that __box is copyable-box not
3265         semiregular-box.
3266         (test03): New test.
3267         * testsuite/std/ranges/p2325.cc: New test.
3268         * testsuite/std/ranges/single_view.cc (test06): New test.
3269         * testsuite/std/ranges/view.cc: Adjust now that view doesn't
3270         require default_initializable.
3271
3272 2021-06-17  Jonathan Wakely  <jwakely@redhat.com>
3273
3274         PR libstdc++/91488
3275         * include/bits/basic_string.h (__cpp_lib_constexpr_string): Only
3276         define when is_constant_evaluated is available.
3277         * include/bits/char_traits.h (__cpp_lib_constexpr_char_traits):
3278         Likewise.
3279         (__constant_string_p, __constant_array_p): Remove.
3280         (char_traits): Use is_constant_evaluated directly.
3281         * include/std/version (__cpp_lib_constexpr_char_traits)
3282         (__cpp_lib_constexpr_string): Only define when
3283         is_constant_evaluated is available.
3284
3285 2021-06-17  Patrick Palka  <ppalka@redhat.com>
3286
3287         PR libstdc++/100940
3288         * include/std/ranges (__adaptor::_Partial): For the "simple"
3289         forwarding partial specializations, also require that
3290         the extra arguments are trivially copyable.
3291         * testsuite/std/ranges/adaptors/100577.cc (test04): New test.
3292
3293 2021-06-17  Patrick Palka  <ppalka@redhat.com>
3294
3295         PR libstdc++/100940
3296         * include/std/ranges (__adaptor::_RangeAdaptor): Document the
3297         template form of _S_has_simple_extra_args.
3298         (__adaptor::__adaptor_has_simple_extra_args): Add _Args template
3299         parameter pack.  Try to treat _S_has_simple_extra_args as a
3300         variable template parameterized by _Args.
3301         (__adaptor::_Partial): Pass _Arg/_Args to the constraint
3302         __adaptor_has_simple_extra_args.
3303         (views::_Take::_S_has_simple_extra_args): Templatize according
3304         to the type of the extra argument.
3305         (views::_Drop::_S_has_simple_extra_args): Likewise.
3306         (views::_Split::_S_has_simple_extra_args): Define.
3307         * testsuite/std/ranges/adaptors/100577.cc (test01, test02):
3308         Adjust after changes to _S_has_simple_extra_args mechanism.
3309         (test03): Define.
3310
3311 2021-06-16  Jonathan Wakely  <jwakely@redhat.com>
3312
3313         * include/bits/iterator_concepts.h (__decay_copy): Name type.
3314
3315 2021-06-16  Jonathan Wakely  <jwakely@redhat.com>
3316
3317         * include/bits/ranges_base.h (ranges::begin, ranges::end)
3318         (ranges::cbegin, ranges::cend, ranges::rbeing, ranges::rend)
3319         (ranges::crbegin, ranges::crend, ranges::size, ranges::ssize)
3320         (ranges::empty, ranges::data, ranges::cdata): Remove final
3321         keywords and deleted operator& overloads.
3322         * testsuite/24_iterators/customization_points/iter_move.cc: Use
3323         new is_customization_point_object function.
3324         * testsuite/24_iterators/customization_points/iter_swap.cc:
3325         Likewise.
3326         * testsuite/std/concepts/concepts.lang/concept.swappable/swap.cc:
3327         Likewise.
3328         * testsuite/std/ranges/access/begin.cc: Likewise.
3329         * testsuite/std/ranges/access/cbegin.cc: Likewise.
3330         * testsuite/std/ranges/access/cdata.cc: Likewise.
3331         * testsuite/std/ranges/access/cend.cc: Likewise.
3332         * testsuite/std/ranges/access/crbegin.cc: Likewise.
3333         * testsuite/std/ranges/access/crend.cc: Likewise.
3334         * testsuite/std/ranges/access/data.cc: Likewise.
3335         * testsuite/std/ranges/access/empty.cc: Likewise.
3336         * testsuite/std/ranges/access/end.cc: Likewise.
3337         * testsuite/std/ranges/access/rbegin.cc: Likewise.
3338         * testsuite/std/ranges/access/rend.cc: Likewise.
3339         * testsuite/std/ranges/access/size.cc: Likewise.
3340         * testsuite/std/ranges/access/ssize.cc: Likewise.
3341         * testsuite/util/testsuite_iterators.h
3342         (is_customization_point_object): New function.
3343
3344 2021-06-15  Jonathan Wakely  <jwakely@redhat.com>
3345
3346         * include/bits/ranges_base.h (ranges::begin, ranges::end)
3347         (ranges::cbegin, ranges::cend, ranges::rbeing, ranges::rend)
3348         (ranges::crbegin, ranges::crend, ranges::size, ranges::ssize)
3349         (ranges::empty, ranges::data, ranges::cdata): Make types final.
3350         Add deleted operator& overloads.
3351         (ranges::advance, ranges::distance, ranges::next, ranges::prev):
3352         Likewise.
3353         * testsuite/std/ranges/headers/ranges/synopsis.cc: Replace
3354         ill-formed & expressions with using-declarations. Add checks for
3355         other function objects.
3356
3357 2021-06-15  Jonathan Wakely  <jwakely@redhat.com>
3358
3359         * include/bits/ranges_util.h (view_interface): Add noexcept to
3360         empty, operator bool, data and size members.
3361         (subrange): Add noexcept to constructors.
3362         * include/std/ranges (single_view, ref_view): Add noexcept to
3363         constructors.
3364         (views::single, views::all): Add noexcept.
3365         * testsuite/std/ranges/adaptors/all.cc: Check noexcept.
3366         * testsuite/std/ranges/single_view.cc: Likewise.
3367
3368 2021-06-15  Jonathan Wakely  <jwakely@redhat.com>
3369
3370         * include/bits/ranges_util.h (subrange): Add __size_type typedef
3371         and use it to simplify declarations.
3372         (subrange(i, s, n)): Remove assertion.
3373         * testsuite/std/ranges/subrange/constexpr.cc: New test.
3374
3375 2021-06-15  Jonathan Wakely  <jwakely@redhat.com>
3376
3377         * include/bits/iterator_concepts.h (__cust_access::__decay_copy):
3378         Replace with function object.
3379         (__cust_access::__member_begin, ___cust_access::_adl_begin): Use
3380         __decay_copy unqualified.
3381         * include/bits/ranges_base.h (__member_end, __adl_end):
3382         Likewise. Use __range_iter_t for type of ranges::begin.
3383         (__member_rend): Use correct value category for rbegin argument.
3384         (__member_data): Use __decay_copy unqualified.
3385         (__begin_data): Use __range_iter_t for type of ranges::begin.
3386
3387 2021-06-14  Jonathan Wakely  <jwakely@redhat.com>
3388
3389         * include/bits/ranges_base.h (ranges::empty): Check whether
3390         conversion to bool can throw.
3391         * testsuite/std/ranges/access/empty.cc: Check for correct
3392         noexcept-specifier.
3393
3394 2021-06-14  Jonathan Wakely  <jwakely@redhat.com>
3395
3396         PR libstdc++/100894
3397         * include/std/type_traits (__common_ref_impl<X&, Y&>): Only
3398         use the type if it's a reference.
3399         * testsuite/20_util/common_reference/100894.cc: New test.
3400
3401 2021-06-14  Jonathan Wakely  <jwakely@redhat.com>
3402
3403         * testsuite/experimental/filesystem/path/native/conv_c++23.cc:
3404         Add dg-require-filesystem-ts directive.
3405
3406 2021-06-14  Jonathan Wakely  <jwakely@redhat.com>
3407
3408         PR libstdc++/101034
3409         * include/std/any (any(in_place_t<T>, initializer_list<U>, A&&...))
3410         (any::emplace<T>(initializer_list<U>, A&&...)): Fix constraint
3411         to use lvalue.
3412         * testsuite/20_util/any/cons/101034.cc: New test.
3413
3414 2021-06-14  Jonathan Wakely  <jwakely@redhat.com>
3415
3416         * testsuite/17_intro/headers/c++2017/all_attributes.cc: Add
3417         -std=gnu++17 option.
3418
3419 2021-06-14  Jonathan Wakely  <jwakely@redhat.com>
3420
3421         PR libstdc++/101056
3422         * libsupc++/compare (compare_partial_order_fallback): Add
3423         constraint using reversed parameter order, as per LWG 3465.
3424         * testsuite/18_support/comparisons/algorithms/fallback.cc:
3425         Adjust expected result.
3426
3427 2021-06-14  Jonathan Wakely  <jwakely@redhat.com>
3428
3429         * libsupc++/compare (__decayed_same_as): New helper concept.
3430         (strong_order, weak_order, partial_order): Constrain with new
3431         concept instead of using static_assert.
3432         (compare_strong_order_fallback, compare_weak_order_fallback)
3433         (compare_partial_order_fallback): Likewise. Do not deduce return
3434         types. Remove redundant if-constexpr checks.
3435         * testsuite/18_support/comparisons/algorithms/fallback.cc: New test.
3436
3437 2021-06-14  Jonathan Wakely  <jwakely@redhat.com>
3438
3439         PR libstdc++/101055
3440         * include/std/tuple: Use reserved form of attribute name.
3441         * testsuite/17_intro/headers/c++2011/all_attributes.cc: Add
3442         check for no_unique_address.
3443         * testsuite/17_intro/headers/c++2014/all_attributes.cc:
3444         Likewise.
3445         * testsuite/17_intro/headers/c++2017/all_attributes.cc:
3446         Likewise.
3447
3448 2021-06-11  Jonathan Wakely  <jwakely@redhat.com>
3449
3450         * include/bits/fs_path.h (operator==, operator<=>): Use new
3451         _S_compare function.
3452         (path::_S_compare): New function to call path::compare in a
3453         context where path::iterator is complete.
3454         * include/experimental/bits/fs_path.h (operator<, operator==):
3455         Define after path::iterator is complete.
3456         * testsuite/27_io/filesystem/path/native/conv_c++23.cc: New
3457         test.
3458         * testsuite/experimental/filesystem/path/native/conv_c++23.cc:
3459         New test.
3460
3461 2021-06-09  Thomas Rodgers  <rodgert@appliantology.com>
3462
3463         * testsuite/29_atomics/atomic_ref/wait_notify.cc: Guard
3464         test logic with constexpr check for is_always_lock_free.
3465
3466 2021-06-09  Jonathan Wakely  <jwakely@redhat.com>
3467
3468         PR libstdc++/100982
3469         * include/std/optional (optional::operator=(const optional<U>&)):
3470         Fix value category used in is_assignable check.
3471         * testsuite/20_util/optional/assignment/100982.cc: New test.
3472
3473 2021-06-09  Jonathan Wakely  <jwakely@redhat.com>
3474
3475         * include/bits/allocator.h (allocator::is_always_equal): Deprecate.
3476         * include/bits/iterator_concepts.h (indirectly_readable_traits):
3477         Add LWG issue number to comment.
3478         * include/std/memory_resource (polymorphic_allocator::release):
3479         Deprecate.
3480         * testsuite/20_util/allocator/requirements/typedefs.cc: Add
3481         dg-warning for deprecation. Also check std::allocator<void>.
3482
3483 2021-06-08  Thomas Rodgers  <rodgert@appliantology.com>
3484
3485         PR libstdc++/100889
3486         * include/bits/atomic_base.h (atomic_ref<_Tp*>::wait):
3487         Change parameter type from _Tp to _Tp*.
3488         * testsuite/29_atomics/atomic_ref/wait_notify.cc: Extend
3489         coverage of types tested.
3490
3491 2021-06-08  Thomas Rodgers  <rodgert@appliantology.com>
3492
3493         * include/std/barrier (__tree_barrier::_M_arrive): Remove
3494         unnecessary hasher instantiation.
3495
3496 2021-06-08  Jonathan Wakely  <jwakely@redhat.com>
3497
3498         * include/experimental/propagate_const (swap): Constrain.
3499         * testsuite/experimental/propagate_const/swap/lwg3413.cc: New test.
3500
3501 2021-06-07  Avi Kivity  <avi@scylladb.com>
3502
3503         PR libstdc++/100900
3504         * include/std/ranges (elements_view::__iter_cat::_S_iter_cat):
3505         Add missing typename.
3506
3507 2021-06-07  Jonathan Wakely  <jwakely@redhat.com>
3508
3509         PR libstdc++/98842
3510         * include/std/optional (operator<=>(const optional<T>& const U&)):
3511         Add missing constraint and add workaround for template
3512         recursion.
3513         * testsuite/20_util/optional/relops/three_way.cc: Check that
3514         type without equality comparison cannot be compared when wrapped
3515         in std::optional.
3516
3517 2021-06-05  Jonathan Wakely  <jwakely@redhat.com>
3518
3519         PR libstdc++/100824
3520         * include/bits/ranges_base.h (_SSize): Return signed type.
3521         * testsuite/std/ranges/access/ssize.cc: Check with __int128.
3522
3523 2021-06-04  Jonathan Wakely  <jwakely@redhat.com>
3524
3525         * include/bits/ranges_base.h (_SSize): Return the result of
3526         ranges::size converted to the wider of make-signed-like-t<S> and
3527         ptrdiff_t, rather than the ranges different type.
3528         * testsuite/std/ranges/access/ssize.cc: Adjust expected result
3529         for an iota_view that uses an integer class type for its
3530         difference_type.
3531
3532 2021-06-04  Jonathan Wakely  <jwakely@redhat.com>
3533
3534         PR libstdc++/100824
3535         * include/bits/ranges_base.h (__member_data): Use __decay_copy.
3536         * testsuite/std/ranges/access/data.cc: Add testcase from PR.
3537
3538 2021-06-04  Jonathan Wakely  <jwakely@redhat.com>
3539
3540         PR libstdc++/100824
3541         * include/bits/iterator_concepts.h (__detail::__decay_copy)
3542         (__detail::__member_begin, __detail::__adl_begin): Move to
3543         namespace ranges::__cust_access.
3544         (__detail::__ranges_begin): Likewise, and rename to __begin.
3545         Remove redundant static assertion.
3546         * include/bits/ranges_base.h (_Begin, _End, _RBegin, _REnd):
3547         Use lvalue in noexcept specifier.
3548         (__as_const): Add non-deduced parameter for value category.
3549         (_CBegin, _CEnd, _CRBegin, _CREnd, _CData): Adjust uses of
3550         __as_const.
3551         (__member_size, __adl_size, __member_empty, __size0_empty):
3552         (__eq_iter_empty, __adl_data): Use lvalue objects in
3553         requirements.
3554         (__sentinel_size): Likewise. Add check for conversion to
3555         unsigned-like.
3556         (__member_data): Allow non-lvalue types to satisfy the concept,
3557         but use lvalue object in requirements.
3558         (_Size, _SSize): Remove forwarding to always use an lvalue.
3559         (_Data): Likewise. Add static assertion for arrays.
3560         * testsuite/std/ranges/access/cdata.cc: Adjust expected
3561         behaviour for rvalues. Add negative tests for ill-formed
3562         expressions.
3563         * testsuite/std/ranges/access/data.cc: Likewise.
3564         * testsuite/std/ranges/access/empty.cc: Adjust expected
3565         behaviour for rvalues.
3566         * testsuite/std/ranges/access/size.cc: Likewise.
3567
3568 2021-06-04  Tim Adye  <Tim.Adye@cern.ch>
3569
3570         * include/std/any (any::_Manager::_S_access): New static
3571         function to access the contained value.
3572         (any::emplace, __any_caster): Use _S_access member of the
3573         manager type.
3574
3575 2021-06-04  Jonathan Wakely  <jwakely@redhat.com>
3576
3577         * doc/xml/manual/status_cxx2020.xml:
3578         * doc/html/*: Regenerate.
3579         * include/bits/hashtable.h (__cpp_lib_generic_unordered_lookup):
3580         Define.
3581         * include/std/version (__cpp_lib_generic_unordered_lookup):
3582         Define.
3583         * testsuite/23_containers/unordered_map/operations/1.cc: Check
3584         feature test macro.
3585         * testsuite/23_containers/unordered_set/operations/1.cc:
3586         Likewise.
3587
3588 2021-06-03  Patrick Palka  <ppalka@redhat.com>
3589
3590         * include/bits/ranges_algo.h (__detail::__can_reread_output):
3591         Factor out this concept from ...
3592         (__unique_copy_fn::operator()): ... here.  Use the concept
3593         throughout.
3594         * testsuite/std/ranges/range.cc: Remove now ill-formed use
3595         of range_value_t on an output_range.
3596         * testsuite/util/testsuite_iterators.h (output_iterator_wrapper):
3597         Define value_type, pointer and reference member types to void.
3598
3599 2021-06-03  Patrick Palka  <ppalka@redhat.com>
3600
3601         PR libstdc++/100577
3602         * include/std/ranges (_RangeAdaptorClosure): Document
3603         _S_has_simple_call_op mechanism.
3604         (_RangeAdaptor): Document _S_has_simple_extra_args mechanism.
3605         (__closure_has_simple_call_op): New concept.
3606         (__adaptor_has_simple_extra_args): Likewise.
3607         (_Partial<_Adaptor, _Args...>): New partial specialization.
3608         (_Partial<_Adaptor, _Arg>): Likewise.
3609         (_Pipe<_Lhs, _Rhs>): Likewise.
3610         (views::_All::_S_has_simple_call_op): Define to true.
3611         (views::_Filter::_S_has_simple_extra_args): Likewise.
3612         (views::_Transform::_S_has_simple_extra_args): Likewise.
3613         (views::_Take::_S_has_simple_extra_args): Likewise.
3614         (views::_TakeWhile::_S_has_simple_extra_args): Likewise.
3615         (views::_Drop::_S_has_simple_extra_args): Likewise.
3616         (views::_DropWhile::_S_has_simple_extra_args): Likewise.
3617         (views::_Join::_S_has_simple_call_op): Likewise.
3618         (views::_Split): Document why we don't define
3619         _S_has_simple_extra_args to true for this adaptor.
3620         (views::_Common::_S_has_simple_call_op): Define to true.
3621         (views::_Reverse::_S_has_simple_call_op): Likewise.
3622         (views::_Elements::_S_has_simple_call_op): Likewise.
3623         * testsuite/std/ranges/adaptors/100577.cc: New test.
3624
3625 2021-06-02  Jonathan Wakely  <jwakely@redhat.com>
3626
3627         PR libstdc++/100863
3628         PR libstdc++/65816
3629         * include/bits/hashtable_policy.h (_Hashtable_ebo_helper):
3630         Value-initialize subobject.
3631         * testsuite/23_containers/unordered_map/allocator/default_init.cc:
3632         Remove XFAIL.
3633         * testsuite/23_containers/unordered_set/allocator/default_init.cc:
3634         Remove XFAIL.
3635
3636 2021-06-02  Jonathan Wakely  <jwakely@redhat.com>
3637
3638         PR libstdc++/96088
3639         * testsuite/23_containers/unordered_map/96088.cc: Adjust
3640         expected number of allocations.
3641         * testsuite/23_containers/unordered_set/96088.cc: Likewise.
3642
3643 2021-06-02  Jonathan Wakely  <jwakely@redhat.com>
3644
3645         * doc/xml/manual/status_cxxis29124.xml: Improve punctuation.
3646         * doc/xml/manual/status_cxxtr1.xml: Likewise.
3647         * doc/xml/manual/status_cxxtr24733.xml: Likewise.
3648         * doc/html/*: Regenerate.
3649
3650 2021-06-01  Patrick Palka  <ppalka@redhat.com>
3651
3652         PR c++/65816
3653         * testsuite/23_containers/deque/allocator/default_init.cc,
3654         testsuite/23_containers/forward_list/allocator/default_init.cc,
3655         testsuite/23_containers/list/allocator/default_init.cc,
3656         testsuite/23_containers/map/allocator/default_init.cc,
3657         testsuite/23_containers/set/allocator/default_init.cc,
3658         testsuite/23_containers/vector/allocator/default_init.cc,
3659         testsuite/23_containers/vector/bool/allocator/default_init.cc:
3660         Remove xfail.
3661
3662 2021-06-01  Jonathan Wakely  <jwakely@redhat.com>
3663
3664         * testsuite/23_containers/unordered_map/96088.cc: Change
3665         effective target to c++17.
3666         * testsuite/23_containers/unordered_set/96088.cc: Likewise.
3667
3668 2021-06-01  Jonathan Wakely  <jwakely@redhat.com>
3669
3670         * testsuite/22_locale/ctype/is/string/89728_neg.cc: Only test
3671         isblank for C++11 and later.
3672
3673 2021-06-01  Jonathan Wakely  <jwakely@redhat.com>
3674
3675         PR libstdc++/100833
3676         * include/bits/ranges_base.h (ranges::advance(iter, n, sentinel)):
3677         Fix return value for no-op case.
3678         * testsuite/24_iterators/range_operations/advance.cc: Test
3679         return values of three-argument overload.
3680
3681 2021-06-01  Jonathan Wakely  <jwakely@redhat.com>
3682
3683         PR libstdc++/99453
3684         * python/Makefile.am: Use archive name for printer hook if no
3685         dynamic library name is available.
3686         * python/Makefile.in: Regenerate.
3687
3688 2021-05-30  Gerald Pfeifer  <gerald@pfeifer.com>
3689
3690         * doc/xml/manual/abi.xml: Remove dead reference to "Intel
3691         Compilers for Linux: Compatibility with GNU Compilers" article.
3692         * doc/html/manual/abi.html: Regenerate.
3693
3694 2021-05-26  François Dumont  <fdumont@gcc.gnu.org>
3695
3696         * include/debug/formatter.h
3697         (_Error_formatter::_Parameter::_Named): New.
3698         (_Error_formatter::_Parameter::_Type): Inherit latter.
3699         (_Error_formatter::_Parameter::_M_integer): Likewise.
3700         (_Error_formatter::_Parameter::_M_string): Likewise.
3701         * src/c++11/debug.cc: Include <cstring>.
3702         (_Print_func_t): New.
3703         (print_raw(PrintContext&, const char*, ptrdiff_t)): New.
3704         (print_word): Use '%.*s' format in fprintf to render only expected number of chars.
3705         (pretty_print(PrintContext&, const char*, _Print_func_t)): New.
3706         (print_type): Rename in...
3707         (print_type_info): ...this. Use pretty_print.
3708         (print_address, print_integer): New.
3709         (print_named_name, print_iterator_constness, print_iterator_state): New.
3710         (print_iterator_seq_type): New.
3711         (print_named_field, print_type_field, print_instance_field, print_iterator_field): New.
3712         (print_field): Use latters.
3713         (print_quoted_named_name, print_type_type, print_type, print_instance): New.
3714         (print_string(PrintContext&, const char*, const _Parameter*, size_t)):
3715         Change signature to...
3716         (print_string(PrintContext&, const char*, ptrdiff_t, const _Parameter*, size_t)):
3717         ...this and adapt. Remove intermediate buffer to render input string.
3718         (print_string(PrintContext&, const char*, ptrdiff_t)): New.
3719
3720 2021-05-26  Jonathan Wakely  <jwakely@redhat.com>
3721
3722         PR libstdc++/100768
3723         * include/bits/ranges_base.h (advance, distance, next, prev):
3724         Replace function templates with function objects.
3725         * testsuite/24_iterators/headers/iterator/synopsis_c++20.cc:
3726         Adjust for changes to function objects.
3727         * testsuite/std/ranges/adaptors/elements.cc: Add using
3728         declarations for names from namespace ranges.
3729         * testsuite/std/ranges/adaptors/transform.cc: Likewise.
3730         * testsuite/24_iterators/range_operations/100768.cc: New test.
3731
3732 2021-05-24  François Dumont  <fdumont@gcc.gnu.org>
3733
3734         PR libstdc++/96088
3735         * include/bits/hashtable_policy.h (_Select2nd): New.
3736         (_NodeBuilder<>): New.
3737         (_ReuseOrAllocNode<>::operator()): Use variadic template args.
3738         (_AllocNode<>::operator()): Likewise.
3739         * include/bits/hashtable.h
3740         (_Hashtable<>::__node_builder_t): New.
3741         (_Hashtable<>::_M_insert_unique<>(_Kt&&, _Arg&&, const _NodeGenerator&)):
3742          New.
3743         (_Hashtable<>::_S_forward_key): New.
3744         (_Hashtable<>::_M_insert): Use latter.
3745         (_Hashtable<>::_M_insert(const_iterator, _Arg&&, const _NodeGenerator&, false_type)):
3746         Instantiate node first, compute hash code second.
3747         * testsuite/23_containers/unordered_map/96088.cc: New test.
3748         * testsuite/23_containers/unordered_multimap/96088.cc: New test.
3749         * testsuite/23_containers/unordered_multiset/96088.cc: New test.
3750         * testsuite/23_containers/unordered_set/96088.cc: New test.
3751         * testsuite/util/replacement_memory_operators.h
3752         (counter::_M_increment): New.
3753         (counter::_M_decrement): New.
3754         (counter::reset()): New.
3755
3756 2021-05-24  Patrick Palka  <ppalka@redhat.com>
3757
3758         PR libstdc++/100479
3759         * include/std/ranges (__detail::__non_propagating_cache): Move
3760         definition up to before that of _CachedPosition.  Make base
3761         class _Optional_base protected instead of private.  Add const
3762         overload for operator*.
3763         (__detail::_CachedPosition): Rewrite the partial specialization
3764         for forward ranges as a derived class of __non_propagating_cache.
3765         Remove the size constraint on the partial specialization for
3766         random access ranges.  Add copy/move/copy-assignment/move-assignment
3767         members to the offset partial specialization for random
3768         access ranges that propagate the cached value but additionally
3769         invalidate it in the source object on move.
3770         * testsuite/std/ranges/adaptors/100479.cc: New test.
3771
3772 2021-05-24  Jonathan Wakely  <jwakely@redhat.com>
3773
3774         * testsuite/25_algorithms/inplace_merge/constrained.cc: Qualify
3775         call to ranges::next.
3776         * testsuite/25_algorithms/is_sorted/constrained.cc: Likewise.
3777         * testsuite/25_algorithms/is_sorted_until/constrained.cc:
3778         Likewise.
3779         * testsuite/25_algorithms/swap_ranges/1.cc: Qualify call to
3780         swap_ranges.
3781
3782 2021-05-21  Patrick Palka  <ppalka@redhat.com>
3783
3784         PR libstdc++/100606
3785         * include/std/ranges (drop_while_view::begin): Assert the
3786         precondition added by LWG 3490.
3787
3788 2021-05-21  Patrick Palka  <ppalka@redhat.com>
3789
3790         PR libstdc++/100690
3791         * include/std/ranges (iota_view::_Sentinel::_M_distance_from):
3792         Split out this member function from ...
3793         (iota_view::_Sentinel::operator-): ... here, for sake of access
3794         control.
3795         * testsuite/std/ranges/iota/iota_view.cc (test05): New test.
3796
3797 2021-05-20  Jonathan Wakely  <jwakely@redhat.com>
3798
3799         * include/bits/random.tcc (__representable_as_double)
3800         (__p1_representable_as_double): Add "" to static asserts.
3801
3802 2021-05-20  Jonathan Wakely  <jwakely@redhat.com>
3803
3804         PR libstdc++/100676
3805         * include/bits/c++config (__glibcxx_assert_1): Rename to ...
3806         (__glibcxx_constexpr_assert): ... this.
3807         (__glibcxx_assert_impl): Use __glibcxx_constexpr_assert.
3808         (__glibcxx_assert): Define as either __glibcxx_constexpr_assert
3809         or __glibcxx_assert_impl.
3810         (__glibcxx_assert_2): Remove
3811         * include/debug/macros.h (_GLIBCXX_DEBUG_VERIFY_AT_F): Use
3812         __glibcxx_constexpr_assert instead of __glibcxx_assert_1.
3813         * testsuite/21_strings/basic_string_view/element_access/char/back_constexpr_neg.cc:
3814         Adjust expected error.
3815         * testsuite/21_strings/basic_string_view/element_access/char/constexpr_neg.cc:
3816         Likewise.
3817         * testsuite/21_strings/basic_string_view/element_access/char/front_constexpr_neg.cc:
3818         Likewise.
3819         Likewise.
3820         * testsuite/21_strings/basic_string_view/element_access/wchar_t/back_constexpr_neg.cc:
3821         Likewise.
3822         * testsuite/21_strings/basic_string_view/element_access/wchar_t/constexpr_neg.cc:
3823         Likewise.
3824         * testsuite/21_strings/basic_string_view/element_access/wchar_t/front_constexpr_neg.cc:
3825         Likewise.
3826         * testsuite/23_containers/span/back_neg.cc: Likewise.
3827         * testsuite/23_containers/span/front_neg.cc: Likewise.
3828         * testsuite/23_containers/span/index_op_neg.cc: Likewise.
3829
3830 2021-05-20  Patrick Palka  <ppalka@redhat.com>
3831
3832         PR libstdc++/100639
3833         * include/bits/stl_iterator.h (reverse_iterator::difference_type):
3834         In C++20 mode, define in terms of iter_difference_t as per P0896R4.
3835         (reverse_iterator::reference): Likewise, but with iter_reference_t.
3836         (reverse_iterator::value_type): Likewise, but with iter_value_t.
3837         * testsuite/std/ranges/adaptors/reverse.cc (test08): New test.
3838         * testsuite/24_iterators/reverse_iterator/100639.cc: New test.
3839
3840 2021-05-20  Joern Rennecke  <joern.rennecke@riscy-ip.com>
3841
3842         PR libstdc++/100361
3843         * include/std/charconv (to_chars): Hide the overloads for
3844         floating-point types for 16 bit targets.
3845         * src/c++17/floating_to_chars.cc: Don't compile for 16 bit targets.
3846         * testsuite/20_util/to_chars/double.cc: Run this test only on
3847         size32plus targets.
3848         * testsuite/20_util/to_chars/float.cc: Likewise.
3849         * testsuite/20_util/to_chars/long_double.cc: Likewise.
3850
3851 2021-05-18  Patrick Palka  <ppalka@redhat.com>
3852
3853         PR libstdc++/100631
3854         * include/std/ranges (elements_view::_Sentinel::operator-): Use
3855         _M_distance_from in the other operator- overload too.
3856         * testsuite/std/ranges/adaptors/elements.cc (test06): Augment test.
3857
3858 2021-05-18  Thomas Schwinge  <thomas@codesourcery.com>
3859
3860         * testsuite/lib/prune.exp: Add note about 'dg-note'.
3861
3862 2021-05-18  Patrick Palka  <ppalka@redhat.com>
3863
3864         PR libstdc++/100475
3865         * include/std/ranges (__box::__box): Use non-list-initialization
3866         in member initializer list of in-place constructor of the
3867         partial specialization for semiregular types.
3868         (__box::operator->): Use std::__addressof.
3869         * testsuite/std/ranges/adaptors/detail/semiregular_box.cc
3870         (test02): New test.
3871         * testsuite/std/ranges/single_view.cc (test04): New test.
3872
3873 2021-05-18  Patrick Palka  <ppalka@redhat.com>
3874
3875         PR libstdc++/100621
3876         * include/std/ranges (reverse_view::_S_needs_cached_begin):
3877         Set to true if the underlying non-common random-access range
3878         doesn't have a sized sentinel.
3879
3880 2021-05-18  Patrick Palka  <ppalka@redhat.com>
3881
3882         PR libstdc++/100631
3883         * include/std/ranges (elements_view::_Iterator): Also befriend
3884         _Sentinel<!_Const>.
3885         (elements_view::_Sentinel::_M_equal): Templatize.
3886         (elements_view::_Sentinel::_M_distance_from): Split out from ...
3887         (elements_view::_Sentinel::operator-): ... here.  Depend on
3888         _Base2 instead of _Base in the return type.
3889         * testsuite/std/ranges/adaptors/elements.cc (test06, test07):
3890         New tests.
3891
3892 2021-05-17  Thomas Rodgers  <rodgert@twrodgers.com>
3893
3894         * include/bits/atomic_wait.h (__waiter::_M_do_wait_v): loop
3895         until value change observed.
3896         (__waiter_base::_M_laundered): New member.
3897         (__waiter_base::_M_notify): Check _M_laundered to determine
3898         whether to wake one or all.
3899         (__detail::__atomic_compare): Return true if call to
3900         __builtin_memcmp() == 0.
3901         (__waiter_base::_S_do_spin_v): Adjust predicate.
3902         * testsuite/29_atomics/atomic/wait_notify/100334.cc: New
3903         test.
3904
3905 2021-05-17  Jonathan Wakely  <jwakely@redhat.com>
3906
3907         PR libstdc++/100630
3908         * include/experimental/bits/fs_path.h (__is_constructible_from):
3909         Test construction from a const lvalue, not an rvalue.
3910         * testsuite/27_io/filesystem/path/construct/100630.cc: New test.
3911         * testsuite/experimental/filesystem/path/construct/100630.cc:
3912         New test.
3913
3914 2021-05-17  Antony Polukhin  <antoshkka@gmail.com>
3915
3916         PR libstdc++/89728
3917         * include/bits/locale_facets.h (ctype<basic_string<C,T,A>>):
3918         Declare (but do not define) partial specialization.
3919         * testsuite/22_locale/ctype/is/string/89728_neg.cc: New test.
3920
3921 2021-05-17  Jonathan Wakely  <jwakely@redhat.com>
3922
3923         * include/std/thread (jthread::_S_create): Fix static assert
3924         message.
3925         * testsuite/30_threads/jthread/95989.cc: Re-enable test.
3926         * testsuite/30_threads/jthread/jthread.cc: Do not require
3927         pthread effective target.
3928         * testsuite/30_threads/jthread/2.cc: Moved to...
3929         * testsuite/30_threads/jthread/version.cc: ...here.
3930
3931 2021-05-17  Jonathan Wakely  <jwakely@redhat.com>
3932
3933         * doc/Makefile.am: Simplify doxygen recipes and use --latex_cmd.
3934         * doc/Makefile.in: Regenerate.
3935         * doc/doxygen/user.cfg.in (LATEX_CMD_NAME): Add placeholder
3936         value.
3937         * scripts/run_doxygen (print_usage): Always print to stdout and
3938         do not exit.
3939         (fail): New function for exiting on error.
3940         (parse_options): Handle --latex_cmd. Do not treat --help the
3941         same as errors. Simplify handling of required arguments.
3942
3943 2021-05-12  Jonathan Wakely  <jwakely@redhat.com>
3944
3945         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_end.cc:
3946         Increase dg-timeout-factor to 4. Fix -Wunused-parameter
3947         warnings. Replace bitwise AND with logical AND in loop
3948         condition.
3949         * testsuite/25_algorithms/pstl/alg_nonmodifying/search_n.cc:
3950         Replace bitwise AND with logical AND in loop condition.
3951         * testsuite/util/pstl/test_utils.h: Remove unused parameter
3952         names.
3953
3954 2021-05-11  Patrick Palka  <ppalka@redhat.com>
3955
3956         * src/c++17/ryu/LOCAL_PATCHES: Update.
3957         * src/c++17/ryu/ryu_generic_128.h: Remove extern "C".
3958         Remove declarations for never-defined functions.
3959         * testsuite/20_util/to_chars/4.cc: New test.
3960
3961 2021-05-11  Jonathan Wakely  <jwakely@redhat.com>
3962
3963         * testsuite/20_util/headers/memory/synopsis.cc: Define C++98
3964         alternative for macro.
3965         * testsuite/20_util/shared_ptr/creation/99006.cc: Add effective
3966         target keyword.
3967         * testsuite/25_algorithms/copy/debug/99402.cc: Avoid C++11
3968         syntax.
3969
3970 2021-05-11  Jonathan Wakely  <jwakely@redhat.com>
3971
3972         * include/bits/allocator.h (allocator<void>) [C++20]: Add
3973         missing noexcept to constructor. Restore missing POCMA and
3974         is_always_equal_traits.
3975         [C++17]: Make construct and destroy members private and
3976         declare allocator_traits as a friend.
3977         * include/bits/memoryfwd.h (allocator_traits): Declare.
3978         * include/ext/malloc_allocator.h (malloc_allocator::allocate):
3979         Add nodiscard attribute. Add static assertion for LWG 3307.
3980         * include/ext/new_allocator.h (new_allocator::allocate): Add
3981         static assertion for LWG 3307.
3982         * testsuite/20_util/allocator/void.cc: Check that converting
3983         constructor is noexcept. Check for propagation traits and
3984         size_type and difference_type. Check that pointer and
3985         const_pointer are gone in C++20.
3986
3987 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
3988
3989         * include/std/stop_token: Remove TODO comment.
3990
3991 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
3992
3993         * include/bits/shared_ptr_base.h (__shared_count(unique_ptr&&)):
3994         Initialize a non-reference deleter from an rvalue, as per LWG
3995         3548.
3996         (__shared_ptr::_UniqCompatible): Add missing constraint.
3997         * testsuite/20_util/shared_ptr/cons/lwg3548.cc: New test.
3998         * testsuite/20_util/shared_ptr/cons/unique_ptr_deleter.cc: Check
3999         constraints.
4000
4001 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
4002
4003         * testsuite/17_intro/headers/c++2017/all_attributes.cc: Remove
4004         -std=gnu++17 from dg-options directive.
4005         * testsuite/17_intro/headers/c++2017/all_no_exceptions.cc:
4006         Likewise.
4007         * testsuite/17_intro/headers/c++2017/all_pedantic_errors.cc:
4008         Likewise.
4009         * testsuite/17_intro/headers/c++2017/operator_names.cc:
4010         Likewise.
4011         * testsuite/17_intro/headers/c++2017/parallel_mode.cc: Likewise.
4012         * testsuite/17_intro/headers/c++2017/stdc++.cc: Likewise.
4013         * testsuite/17_intro/headers/c++2017/stdc++_multiple_inclusion.cc:
4014         Likewise.
4015         * testsuite/18_support/aligned_alloc/aligned_alloc.cc: Likewise.
4016         * testsuite/18_support/byte/81076.cc: Likewise.
4017         * testsuite/18_support/byte/global_neg.cc: Likewise.
4018         * testsuite/18_support/byte/ops.cc: Likewise.
4019         * testsuite/18_support/byte/requirements.cc: Likewise.
4020         * testsuite/18_support/headers/cfloat/values_c++17.cc: Likewise.
4021         * testsuite/18_support/launder/1.cc: Likewise.
4022         * testsuite/18_support/launder/nodiscard.cc: Likewise.
4023         * testsuite/18_support/launder/requirements.cc: Likewise.
4024         * testsuite/18_support/launder/requirements_neg.cc: Likewise.
4025         * testsuite/18_support/new_aligned.cc: Likewise.
4026         * testsuite/18_support/uncaught_exceptions/uncaught_exceptions.cc:
4027         Likewise.
4028         * testsuite/19_diagnostics/error_code/is_error_code_v.cc:
4029         Likewise.
4030         * testsuite/19_diagnostics/error_condition/hash.cc: Likewise.
4031         * testsuite/20_util/addressof/requirements/constexpr.cc:
4032         Likewise.
4033         * testsuite/20_util/as_const/1.cc: Likewise.
4034         * testsuite/20_util/as_const/rvalue_neg.cc: Likewise.
4035         * testsuite/20_util/bind/83427.cc: Likewise.
4036         * testsuite/20_util/bind/is_placeholder_v.cc: Likewise.
4037         * testsuite/20_util/bool_constant/requirements.cc: Likewise.
4038         * testsuite/20_util/duration/arithmetic/constexpr_c++17.cc:
4039         Likewise.
4040         * testsuite/20_util/duration/requirements/treat_as_floating_point_v.cc:
4041         Likewise.
4042         * testsuite/20_util/duration_cast/rounding.cc: Likewise.
4043         * testsuite/20_util/enable_shared_from_this/members/weak_from_this.cc:
4044         Likewise.
4045         * testsuite/20_util/from_chars/1_neg.cc: Likewise.
4046         * testsuite/20_util/from_chars/requirements.cc: Likewise.
4047         * testsuite/20_util/function/91456.cc: Likewise.
4048         * testsuite/20_util/function/cons/deduction.cc: Likewise.
4049         * testsuite/20_util/function_objects/83607.cc: Likewise.
4050         * testsuite/20_util/function_objects/invoke/59768.cc: Likewise.
4051         * testsuite/20_util/function_objects/mem_fn/80478.cc: Likewise.
4052         * testsuite/20_util/function_objects/not_fn/1.cc: Likewise.
4053         * testsuite/20_util/function_objects/not_fn/87538.cc: Likewise.
4054         * testsuite/20_util/has_unique_object_representations/requirements/explicit_instantiation.cc:
4055         Likewise.
4056         * testsuite/20_util/has_unique_object_representations/requirements/typedefs.cc:
4057         Likewise.
4058         * testsuite/20_util/has_unique_object_representations/value.cc:
4059         Likewise.
4060         * testsuite/20_util/hash/nullptr.cc: Likewise.
4061         * testsuite/20_util/in_place/requirements.cc: Likewise.
4062         * testsuite/20_util/is_aggregate/incomplete_neg.cc: Likewise.
4063         * testsuite/20_util/is_aggregate/requirements/explicit_instantiation.cc:
4064         Likewise.
4065         * testsuite/20_util/is_aggregate/requirements/typedefs.cc:
4066         Likewise.
4067         * testsuite/20_util/is_aggregate/value.cc: Likewise.
4068         * testsuite/20_util/is_invocable/83395.cc: Likewise.
4069         * testsuite/20_util/is_invocable/91456.cc: Likewise.
4070         * testsuite/20_util/is_invocable/requirements/explicit_instantiation.cc:
4071         Likewise.
4072         * testsuite/20_util/is_invocable/requirements/typedefs.cc:
4073         Likewise.
4074         * testsuite/20_util/is_invocable/value.cc: Likewise.
4075         * testsuite/20_util/is_literal_type/deprecated-1z.cc: Likewise.
4076         * testsuite/20_util/is_nothrow_constructible/94003.cc: Likewise.
4077         * testsuite/20_util/is_nothrow_invocable/83395.cc: Likewise.
4078         * testsuite/20_util/is_nothrow_invocable/requirements/explicit_instantiation.cc:
4079         Likewise.
4080         * testsuite/20_util/is_nothrow_invocable/requirements/typedefs.cc: Likewise.
4081         * testsuite/20_util/is_nothrow_invocable/value.cc: Likewise.
4082         * testsuite/20_util/is_nothrow_swappable/requirements/explicit_instantiation.cc:
4083         Likewise.
4084         * testsuite/20_util/is_nothrow_swappable/requirements/typedefs.cc:
4085         Likewise.
4086         * testsuite/20_util/is_nothrow_swappable/value.cc: Likewise.
4087         * testsuite/20_util/is_nothrow_swappable_with/requirements/explicit_instantiation.cc:
4088         Likewise.
4089         * testsuite/20_util/is_nothrow_swappable_with/requirements/typedefs.cc:
4090         Likewise.
4091         * testsuite/20_util/is_nothrow_swappable_with/value.cc:
4092         Likewise.
4093         * testsuite/20_util/is_swappable/requirements/explicit_instantiation.cc:
4094         Likewise.
4095         * testsuite/20_util/is_swappable/requirements/typedefs.cc:
4096         Likewise.
4097         * testsuite/20_util/is_swappable/value.cc: Likewise.
4098         * testsuite/20_util/is_swappable_with/requirements/explicit_instantiation.cc:
4099         Likewise.
4100         * testsuite/20_util/is_swappable_with/requirements/typedefs.cc:
4101         Likewise.
4102         * testsuite/20_util/is_swappable_with/value.cc: Likewise.
4103         * testsuite/20_util/logical_traits/83134.cc: Likewise.
4104         * testsuite/20_util/logical_traits/requirements/explicit_instantiation.cc:
4105         Likewise.
4106         * testsuite/20_util/logical_traits/requirements/typedefs.cc:
4107         Likewise.
4108         * testsuite/20_util/logical_traits/value.cc: Likewise.
4109         * testsuite/20_util/pair/cons/deduction.cc: Likewise.
4110         * testsuite/20_util/pair/swap_cxx17.cc: Likewise.
4111         * testsuite/20_util/ratio/requirements/ratio_equal_v.cc:
4112         Likewise.
4113         * testsuite/20_util/reference_wrapper/83427.cc: Likewise.
4114         * testsuite/20_util/reference_wrapper/deduction.cc: Likewise.
4115         * testsuite/20_util/shared_ptr/casts/reinterpret.cc: Likewise.
4116         * testsuite/20_util/shared_ptr/cons/deduction.cc: Likewise.
4117         * testsuite/20_util/shared_ptr/requirements/weak_type.cc:
4118         Likewise.
4119         * testsuite/20_util/time_point/arithmetic/constexpr.cc:
4120         Likewise.
4121         * testsuite/20_util/time_point_cast/rounding.cc: Likewise.
4122         * testsuite/20_util/to_chars/3.cc: Likewise.
4123         * testsuite/20_util/to_chars/chars_format.cc: Likewise.
4124         * testsuite/20_util/to_chars/lwg3266.cc: Likewise.
4125         * testsuite/20_util/to_chars/requirements.cc: Likewise.
4126         * testsuite/20_util/tuple/78939.cc: Likewise.
4127         * testsuite/20_util/tuple/apply/1.cc: Likewise.
4128         * testsuite/20_util/tuple/apply/2.cc: Likewise.
4129         * testsuite/20_util/tuple/cons/deduction.cc: Likewise.
4130         * testsuite/20_util/tuple/make_from_tuple/1.cc: Likewise.
4131         * testsuite/20_util/tuple/make_from_tuple/2.cc: Likewise.
4132         * testsuite/20_util/tuple/swap_cxx17.cc: Likewise.
4133         * testsuite/20_util/tuple/tuple_size_v.cc: Likewise.
4134         * testsuite/20_util/unique_ptr/cons/deduction_neg.cc: Likewise.
4135         * testsuite/20_util/uses_allocator/requirements/uses_allocator_v.cc:
4136         Likewise.
4137         * testsuite/20_util/variable_templates_for_traits.cc: Likewise.
4138         * testsuite/20_util/void_t/1.cc: Likewise.
4139         * testsuite/20_util/weak_ptr/cons/deduction.cc: Likewise.
4140         * testsuite/24_iterators/container_access.cc: Likewise.
4141         * testsuite/24_iterators/headers/iterator/range_access_c++17.cc:
4142         Likewise.
4143         * testsuite/24_iterators/headers/iterator/synopsis_c++17.cc:
4144         Likewise.
4145         * testsuite/24_iterators/range_access/range_access_cpp17.cc:
4146         Likewise.
4147         * testsuite/24_iterators/range_access/range_access_cpp17_neg.cc:
4148         Likewise.
4149         * testsuite/26_numerics/gcd/gcd_neg.cc: Likewise.
4150         * testsuite/26_numerics/headers/cmath/functions_std_c++17.cc:
4151         Likewise.
4152         * testsuite/26_numerics/headers/cmath/hypot.cc: Likewise.
4153         * testsuite/26_numerics/headers/cmath/special_functions_global.cc:
4154         Likewise.
4155         * testsuite/26_numerics/lcm/1.cc: Likewise.
4156         * testsuite/26_numerics/lcm/lcm_neg.cc: Likewise.
4157         * testsuite/26_numerics/valarray/deduction.cc: Likewise.
4158         * testsuite/27_io/basic_ostream/inserters_other/char/lwg2221.cc:
4159         Likewise.
4160         * testsuite/27_io/manipulators/standard/char/quoted_sv.cc:
4161         Likewise.
4162         * testsuite/27_io/manipulators/standard/wchar_t/quoted_sv.cc:
4163         Likewise.
4164         * testsuite/27_io/types/4.cc: Likewise.
4165         * testsuite/28_regex/basic_regex/ctors/deduction.cc: Likewise.
4166         * testsuite/libstdc++-prettyprinters/91997.cc: Likewise.
4167         * testsuite/libstdc++-prettyprinters/cxx17.cc: Likewise.
4168
4169 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
4170
4171         * testsuite/20_util/function_objects/searchers.cc: Remove
4172         -std=gnu++17 from dg-options directive.
4173         * testsuite/20_util/specialized_algorithms/memory_management_tools/1.cc:
4174         Likewise.
4175         * testsuite/20_util/specialized_algorithms/memory_management_tools/destroy_neg.cc:
4176         Likewise.
4177         * testsuite/20_util/specialized_algorithms/uninitialized_value_construct/94540.cc:
4178         Likewise.
4179         * testsuite/20_util/specialized_algorithms/uninitialized_value_construct/94831.cc:
4180         Likewise.
4181         * testsuite/20_util/specialized_algorithms/uninitialized_value_construct_n/94540.cc:
4182         Likewise.
4183         * testsuite/20_util/specialized_algorithms/uninitialized_value_construct_n/sizes.cc:
4184         Likewise.
4185         * testsuite/20_util/unique_ptr/specialized_algorithms/swap_cxx17.cc:
4186         Likewise.
4187         * testsuite/25_algorithms/clamp/1.cc: Likewise.
4188         * testsuite/25_algorithms/clamp/2.cc: Likewise.
4189         * testsuite/25_algorithms/clamp/constexpr.cc: Likewise.
4190         * testsuite/25_algorithms/clamp/requirements/explicit_instantiation/1.cc:
4191         Likewise.
4192         * testsuite/25_algorithms/clamp/requirements/explicit_instantiation/pod.cc:
4193         Likewise.
4194         * testsuite/25_algorithms/for_each/for_each_n.cc: Likewise.
4195         * testsuite/25_algorithms/for_each/for_each_n_debug.cc:
4196         Likewise.
4197         * testsuite/25_algorithms/sample/1.cc: Likewise.
4198         * testsuite/25_algorithms/sample/2.cc: Likewise.
4199         * testsuite/25_algorithms/sample/3.cc: Likewise.
4200         * testsuite/25_algorithms/sample/81221.cc: Likewise.
4201         * testsuite/25_algorithms/search/searcher.cc: Likewise.
4202         * testsuite/26_numerics/exclusive_scan/1.cc: Likewise.
4203         * testsuite/26_numerics/inclusive_scan/1.cc: Likewise.
4204         * testsuite/26_numerics/reduce/1.cc: Likewise.
4205         * testsuite/26_numerics/reduce/2.cc: Likewise.
4206         * testsuite/26_numerics/transform_exclusive_scan/1.cc: Likewise.
4207         * testsuite/26_numerics/transform_inclusive_scan/1.cc: Likewise.
4208         * testsuite/26_numerics/transform_reduce/1.cc: Likewise.
4209
4210 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
4211
4212         * testsuite/23_containers/array/cons/deduction.cc: Remove
4213         -std=gnu++17 from dg-options directive.
4214         * testsuite/23_containers/array/cons/deduction_neg.cc: Likewise.
4215         * testsuite/23_containers/array/element_access/constexpr_c++17.cc:
4216         Likewise.
4217         * testsuite/23_containers/array/requirements/constexpr_iter.cc:
4218         Likewise.
4219         * testsuite/23_containers/array/specialized_algorithms/swap_cxx17.cc:
4220         Likewise.
4221         * testsuite/23_containers/deque/cons/deduction.cc: Likewise.
4222         * testsuite/23_containers/deque/modifiers/emplace/cxx17_return.cc:
4223         Likewise.
4224         * testsuite/23_containers/forward_list/cons/deduction.cc:
4225         Likewise.
4226         * testsuite/23_containers/forward_list/modifiers/emplace_cxx17_return.cc:
4227         Likewise.
4228         * testsuite/23_containers/list/cons/deduction.cc: Likewise.
4229         * testsuite/23_containers/list/modifiers/emplace/cxx17_return.cc:
4230         Likewise.
4231         * testsuite/23_containers/map/cons/deduction.cc: Likewise.
4232         * testsuite/23_containers/map/modifiers/extract.cc: Likewise.
4233         * testsuite/23_containers/map/modifiers/insert/83226.cc:
4234         Likewise.
4235         * testsuite/23_containers/map/modifiers/insert_or_assign/1.cc:
4236         Likewise.
4237         * testsuite/23_containers/map/modifiers/merge.cc: Likewise.
4238         * testsuite/23_containers/map/modifiers/try_emplace/1.cc:
4239         Likewise.
4240         * testsuite/23_containers/multimap/cons/deduction.cc: Likewise.
4241         * testsuite/23_containers/multimap/modifiers/extract.cc:
4242         Likewise.
4243         * testsuite/23_containers/multimap/modifiers/merge.cc: Likewise.
4244         * testsuite/23_containers/multiset/cons/deduction.cc: Likewise.
4245         * testsuite/23_containers/multiset/modifiers/extract.cc:
4246         Likewise.
4247         * testsuite/23_containers/multiset/modifiers/merge.cc: Likewise.
4248         * testsuite/23_containers/priority_queue/deduction.cc: Likewise.
4249         * testsuite/23_containers/queue/deduction.cc: Likewise.
4250         * testsuite/23_containers/queue/members/emplace_cxx17_return.cc:
4251         Likewise.
4252         * testsuite/23_containers/set/cons/deduction.cc: Likewise.
4253         * testsuite/23_containers/set/modifiers/extract.cc: Likewise.
4254         * testsuite/23_containers/set/modifiers/merge.cc: Likewise.
4255         * testsuite/23_containers/set/modifiers/node_swap.cc: Likewise.
4256         * testsuite/23_containers/stack/deduction.cc: Likewise.
4257         * testsuite/23_containers/stack/members/emplace_cxx17_return.cc:
4258         Likewise.
4259         * testsuite/23_containers/unordered_map/cons/deduction.cc:
4260         Likewise.
4261         * testsuite/23_containers/unordered_map/modifiers/extract.cc:
4262         Likewise.
4263         * testsuite/23_containers/unordered_map/modifiers/insert_or_assign.cc:
4264         Likewise.
4265         * testsuite/23_containers/unordered_map/modifiers/merge.cc:
4266         Likewise.
4267         * testsuite/23_containers/unordered_map/modifiers/try_emplace.cc:
4268         Likewise.
4269         * testsuite/23_containers/unordered_multimap/cons/deduction.cc:
4270         Likewise.
4271         * testsuite/23_containers/unordered_multimap/modifiers/extract.cc:
4272         Likewise.
4273         * testsuite/23_containers/unordered_multimap/modifiers/merge.cc:
4274         Likewise.
4275         * testsuite/23_containers/unordered_multiset/cons/deduction.cc:
4276         Likewise.
4277         * testsuite/23_containers/unordered_multiset/modifiers/extract.cc:
4278         Likewise.
4279         * testsuite/23_containers/unordered_multiset/modifiers/merge.cc:
4280         Likewise.
4281         * testsuite/23_containers/unordered_set/cons/deduction.cc:
4282         Likewise.
4283         * testsuite/23_containers/unordered_set/modifiers/extract.cc:
4284         Likewise.
4285         * testsuite/23_containers/unordered_set/modifiers/merge.cc:
4286         Likewise.
4287         * testsuite/23_containers/vector/bool/emplace_cxx17_return.cc:
4288         Likewise.
4289         * testsuite/23_containers/vector/cons/89164_c++17.cc: Likewise.
4290         * testsuite/23_containers/vector/cons/deduction.cc: Likewise.
4291         * testsuite/23_containers/vector/modifiers/emplace/cxx17_return.cc:
4292         Likewise.
4293
4294 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
4295
4296         * testsuite/21_strings/basic_string/79162.cc: Remove
4297         -std=gnu++17 from dg-options directive.
4298         * testsuite/21_strings/basic_string/cons/char/7.cc: Likewise.
4299         * testsuite/21_strings/basic_string/cons/char/79162.cc:
4300         Likewise.
4301         * testsuite/21_strings/basic_string/cons/char/86138.cc:
4302         Likewise.
4303         * testsuite/21_strings/basic_string/cons/char/9.cc: Likewise.
4304         * testsuite/21_strings/basic_string/cons/char/deduction.cc:
4305         Likewise.
4306         * testsuite/21_strings/basic_string/cons/char/moveable2_c++17.cc:
4307         Likewise.
4308         * testsuite/21_strings/basic_string/cons/wchar_t/7.cc: Likewise.
4309         * testsuite/21_strings/basic_string/cons/wchar_t/79162.cc:
4310         Likewise.
4311         * testsuite/21_strings/basic_string/cons/wchar_t/86138.cc:
4312         Likewise.
4313         * testsuite/21_strings/basic_string/cons/wchar_t/9.cc: Likewise.
4314         * testsuite/21_strings/basic_string/cons/wchar_t/deduction.cc:
4315         Likewise.
4316         * testsuite/21_strings/basic_string/cons/wchar_t/moveable2_c++17.cc:
4317         Likewise.
4318         * testsuite/21_strings/basic_string/hash/hash.cc: Likewise.
4319         * testsuite/21_strings/basic_string/lwg2758.cc: Likewise.
4320         * testsuite/21_strings/basic_string/lwg2946.cc: Likewise.
4321         * testsuite/21_strings/basic_string/modifiers/append/char/4.cc:
4322         Likewise.
4323         * testsuite/21_strings/basic_string/modifiers/append/wchar_t/4.cc:
4324         Likewise.
4325         * testsuite/21_strings/basic_string/modifiers/assign/char/4.cc:
4326         Likewise.
4327         * testsuite/21_strings/basic_string/modifiers/assign/wchar_t/4.cc:
4328         Likewise.
4329         * testsuite/21_strings/basic_string/modifiers/insert/char/3.cc:
4330         Likewise.
4331         * testsuite/21_strings/basic_string/modifiers/insert/wchar_t/3.cc:
4332         Likewise.
4333         * testsuite/21_strings/basic_string/modifiers/replace/char/7.cc:
4334         Likewise.
4335         * testsuite/21_strings/basic_string/modifiers/replace/wchar_t/7.cc:
4336         Likewise.
4337         * testsuite/21_strings/basic_string/operations/compare/char/2.cc:
4338         Likewise.
4339         * testsuite/21_strings/basic_string/operations/compare/wchar_t/2.cc:
4340         Likewise.
4341         * testsuite/21_strings/basic_string/operations/data/char/2.cc:
4342         Likewise.
4343         * testsuite/21_strings/basic_string/operations/data/char/86169.cc:
4344         Likewise.
4345         * testsuite/21_strings/basic_string/operations/data/wchar_t/2.cc:
4346         Likewise.
4347         * testsuite/21_strings/basic_string/operations/find/char/5.cc:
4348         Likewise.
4349         * testsuite/21_strings/basic_string/operations/find/wchar_t/5.cc:
4350         Likewise.
4351         * testsuite/21_strings/basic_string/operators/char/5.cc:
4352         Likewise.
4353         * testsuite/21_strings/basic_string/operators/wchar_t/5.cc:
4354         Likewise.
4355         * testsuite/21_strings/basic_string_view/capacity/1.cc:
4356         Likewise.
4357         * testsuite/21_strings/basic_string_view/capacity/empty_neg.cc:
4358         Likewise.
4359         * testsuite/21_strings/basic_string_view/cons/char/1.cc:
4360         Likewise.
4361         * testsuite/21_strings/basic_string_view/cons/char/2.cc:
4362         Likewise.
4363         * testsuite/21_strings/basic_string_view/cons/char/3.cc:
4364         Likewise.
4365         * testsuite/21_strings/basic_string_view/cons/char/nonnull.cc:
4366         Likewise.
4367         * testsuite/21_strings/basic_string_view/cons/wchar_t/1.cc:
4368         Likewise.
4369         * testsuite/21_strings/basic_string_view/cons/wchar_t/2.cc:
4370         Likewise.
4371         * testsuite/21_strings/basic_string_view/cons/wchar_t/3.cc:
4372         Likewise.
4373         * testsuite/21_strings/basic_string_view/cons/wchar_t/nonnull.cc:
4374         Likewise.
4375         * testsuite/21_strings/basic_string_view/element_access/char/1.cc:
4376         Likewise.
4377         * testsuite/21_strings/basic_string_view/element_access/char/2.cc:
4378         Likewise.
4379         * testsuite/21_strings/basic_string_view/element_access/char/back_constexpr_neg.cc:
4380         Likewise.
4381         * testsuite/21_strings/basic_string_view/element_access/char/constexpr.cc:
4382         Likewise.
4383         * testsuite/21_strings/basic_string_view/element_access/char/constexpr_neg.cc:
4384         Likewise.
4385         * testsuite/21_strings/basic_string_view/element_access/char/empty.cc:
4386         Likewise.
4387         * testsuite/21_strings/basic_string_view/element_access/char/front_back.cc:
4388         Likewise.
4389         * testsuite/21_strings/basic_string_view/element_access/char/front_back_constexpr.cc:
4390         Likewise.
4391         * testsuite/21_strings/basic_string_view/element_access/char/front_constexpr_neg.cc:
4392         Likewise.
4393         * testsuite/21_strings/basic_string_view/element_access/wchar_t/1.cc:
4394         Likewise.
4395         * testsuite/21_strings/basic_string_view/element_access/wchar_t/2.cc:
4396         Likewise.
4397         * testsuite/21_strings/basic_string_view/element_access/wchar_t/back_constexpr_neg.cc:
4398         Likewise.
4399         * testsuite/21_strings/basic_string_view/element_access/wchar_t/constexpr.cc:
4400         Likewise.
4401         * testsuite/21_strings/basic_string_view/element_access/wchar_t/constexpr_neg.cc:
4402         Likewise.
4403         * testsuite/21_strings/basic_string_view/element_access/wchar_t/empty.cc:
4404         Likewise.
4405         * testsuite/21_strings/basic_string_view/element_access/wchar_t/front_back.cc:
4406         Likewise.
4407         * testsuite/21_strings/basic_string_view/element_access/wchar_t/front_constexpr_neg.cc:
4408         Likewise.
4409         * testsuite/21_strings/basic_string_view/include.cc: Likewise.
4410         * testsuite/21_strings/basic_string_view/inserters/94051.cc:
4411         Likewise.
4412         * testsuite/21_strings/basic_string_view/inserters/char/1.cc:
4413         Likewise.
4414         * testsuite/21_strings/basic_string_view/inserters/char/2.cc:
4415         Likewise.
4416         * testsuite/21_strings/basic_string_view/inserters/char/3.cc:
4417         Likewise.
4418         * testsuite/21_strings/basic_string_view/inserters/pod/10081-out.cc:
4419         Likewise.
4420         * testsuite/21_strings/basic_string_view/inserters/wchar_t/1.cc:
4421         Likewise.
4422         * testsuite/21_strings/basic_string_view/inserters/wchar_t/2.cc:
4423         Likewise.
4424         * testsuite/21_strings/basic_string_view/inserters/wchar_t/3.cc:
4425         Likewise.
4426         * testsuite/21_strings/basic_string_view/literals/types-char8_t.cc:
4427         Likewise.
4428         * testsuite/21_strings/basic_string_view/literals/types.cc:
4429         Likewise.
4430         * testsuite/21_strings/basic_string_view/literals/values-char8_t.cc:
4431         Likewise.
4432         * testsuite/21_strings/basic_string_view/literals/values.cc:
4433         Likewise.
4434         * testsuite/21_strings/basic_string_view/modifiers/remove_prefix/char/1.cc:
4435         Likewise.
4436         * testsuite/21_strings/basic_string_view/modifiers/remove_prefix/wchar_t/1.cc:
4437         Likewise.
4438         * testsuite/21_strings/basic_string_view/modifiers/remove_suffix/char/1.cc:
4439         Likewise.
4440         * testsuite/21_strings/basic_string_view/modifiers/remove_suffix/wchar_t/1.cc:
4441         Likewise.
4442         * testsuite/21_strings/basic_string_view/modifiers/swap/char/1.cc:
4443         Likewise.
4444         * testsuite/21_strings/basic_string_view/modifiers/swap/wchar_t/1.cc:
4445         Likewise.
4446         * testsuite/21_strings/basic_string_view/operations/compare/char/1.cc:
4447         Likewise.
4448         * testsuite/21_strings/basic_string_view/operations/compare/char/13650.cc:
4449         Likewise.
4450         * testsuite/21_strings/basic_string_view/operations/compare/char/2.cc:
4451         Likewise.
4452         * testsuite/21_strings/basic_string_view/operations/compare/char/70483.cc:
4453         Likewise.
4454         * testsuite/21_strings/basic_string_view/operations/compare/char/nonnull.cc:
4455         Likewise.
4456         * testsuite/21_strings/basic_string_view/operations/compare/wchar_t/1.cc:
4457         Likewise.
4458         * testsuite/21_strings/basic_string_view/operations/compare/wchar_t/13650.cc:
4459         Likewise.
4460         * testsuite/21_strings/basic_string_view/operations/compare/wchar_t/2.cc:
4461         Likewise.
4462         * testsuite/21_strings/basic_string_view/operations/copy/char/1.cc:
4463         Likewise.
4464         * testsuite/21_strings/basic_string_view/operations/copy/char/2.cc:
4465         Likewise.
4466         * testsuite/21_strings/basic_string_view/operations/copy/wchar_t/1.cc:
4467         Likewise.
4468         * testsuite/21_strings/basic_string_view/operations/copy/wchar_t/2.cc:
4469         Likewise.
4470         * testsuite/21_strings/basic_string_view/operations/data/char/1.cc:
4471         Likewise.
4472         * testsuite/21_strings/basic_string_view/operations/data/wchar_t/1.cc:
4473         Likewise.
4474         * testsuite/21_strings/basic_string_view/operations/find/char/1.cc:
4475         Likewise.
4476         * testsuite/21_strings/basic_string_view/operations/find/char/2.cc:
4477         Likewise.
4478         * testsuite/21_strings/basic_string_view/operations/find/char/3.cc:
4479         Likewise.
4480         * testsuite/21_strings/basic_string_view/operations/find/char/4.cc:
4481         Likewise.
4482         * testsuite/21_strings/basic_string_view/operations/find/char/nonnull.cc:
4483         Likewise.
4484         * testsuite/21_strings/basic_string_view/operations/find/wchar_t/1.cc:
4485         Likewise.
4486         * testsuite/21_strings/basic_string_view/operations/find/wchar_t/2.cc:
4487         Likewise.
4488         * testsuite/21_strings/basic_string_view/operations/find/wchar_t/3.cc:
4489         Likewise.
4490         * testsuite/21_strings/basic_string_view/operations/find/wchar_t/4.cc:
4491         Likewise.
4492         * testsuite/21_strings/basic_string_view/operations/rfind/char/1.cc:
4493         Likewise.
4494         * testsuite/21_strings/basic_string_view/operations/rfind/char/2.cc:
4495         Likewise.
4496         * testsuite/21_strings/basic_string_view/operations/rfind/char/3.cc:
4497         Likewise.
4498         * testsuite/21_strings/basic_string_view/operations/rfind/char/nonnull.cc:
4499         Likewise.
4500         * testsuite/21_strings/basic_string_view/operations/rfind/wchar_t/1.cc:
4501         Likewise.
4502         * testsuite/21_strings/basic_string_view/operations/rfind/wchar_t/2.cc:
4503         Likewise.
4504         * testsuite/21_strings/basic_string_view/operations/rfind/wchar_t/3.cc:
4505         Likewise.
4506         * testsuite/21_strings/basic_string_view/operations/string_conversion/1.cc:
4507         Likewise.
4508         * testsuite/21_strings/basic_string_view/operations/substr/char/1.cc:
4509         Likewise.
4510         * testsuite/21_strings/basic_string_view/operations/substr/char/83511.cc:
4511         Likewise.
4512         * testsuite/21_strings/basic_string_view/operations/substr/wchar_t/1.cc:
4513         Likewise.
4514         * testsuite/21_strings/basic_string_view/operations/substr/wchar_t/83511.cc:
4515         Likewise.
4516         * testsuite/21_strings/basic_string_view/operators/char/2.cc:
4517         Likewise.
4518         * testsuite/21_strings/basic_string_view/operators/char/89446.cc:
4519         Likewise.
4520         * testsuite/21_strings/basic_string_view/operators/wchar_t/2.cc:
4521         Likewise.
4522         * testsuite/21_strings/basic_string_view/operators/wchar_t/89446.cc:
4523         Likewise.
4524         * testsuite/21_strings/basic_string_view/range_access/char/1.cc:
4525         Likewise.
4526         * testsuite/21_strings/basic_string_view/range_access/wchar_t/1.cc:
4527         Likewise.
4528         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/1.cc:
4529         Likewise.
4530         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/char/1.cc:
4531         Likewise.
4532         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/char16_t/1.cc:
4533         Likewise.
4534         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/char32_t/1.cc:
4535         Likewise.
4536         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/char8_t/1.cc:
4537         Likewise.
4538         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/wchar_t/1.cc:
4539         Likewise.
4540         * testsuite/21_strings/basic_string_view/requirements/traits_neg.cc:
4541         Likewise.
4542         * testsuite/21_strings/basic_string_view/requirements/typedefs.cc:
4543         Likewise.
4544         * testsuite/21_strings/basic_string_view/typedefs.cc: Likewise.
4545         * testsuite/21_strings/basic_string_view/types/1.cc: Likewise.
4546         * testsuite/21_strings/char_traits/requirements/char/99181.cc:
4547         Likewise.
4548         * testsuite/21_strings/char_traits/requirements/constexpr_functions_c++17.cc:
4549
4550 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
4551
4552         * testsuite/20_util/memory_resource/1.cc: Remove -std=gnu++17
4553         from dg-options directive.
4554         * testsuite/20_util/memory_resource/2.cc: Likewise.
4555         * testsuite/20_util/monotonic_buffer_resource/1.cc: Likewise.
4556         * testsuite/20_util/monotonic_buffer_resource/93208.cc:
4557         Likewise.
4558         * testsuite/20_util/monotonic_buffer_resource/allocate.cc:
4559         Likewise.
4560         * testsuite/20_util/monotonic_buffer_resource/deallocate.cc:
4561         Likewise.
4562         * testsuite/20_util/monotonic_buffer_resource/release.cc:
4563         Likewise.
4564         * testsuite/20_util/monotonic_buffer_resource/upstream_resource.cc:
4565         Likewise.
4566         * testsuite/20_util/polymorphic_allocator/1.cc: Likewise.
4567         * testsuite/20_util/polymorphic_allocator/construct_pair.cc:
4568         Likewise.
4569         * testsuite/20_util/polymorphic_allocator/resource.cc: Likewise.
4570         * testsuite/20_util/polymorphic_allocator/select.cc: Likewise.
4571         * testsuite/20_util/synchronized_pool_resource/allocate.cc:
4572         Likewise.
4573         * testsuite/20_util/synchronized_pool_resource/allocate_single.cc:
4574         Likewise.
4575         * testsuite/20_util/synchronized_pool_resource/cons.cc:
4576         Likewise.
4577         * testsuite/20_util/synchronized_pool_resource/cons_single.cc:
4578         Likewise.
4579         * testsuite/20_util/synchronized_pool_resource/is_equal.cc:
4580         Likewise.
4581         * testsuite/20_util/synchronized_pool_resource/multithreaded.cc:
4582         Likewise.
4583         * testsuite/20_util/synchronized_pool_resource/options.cc:
4584         Likewise.
4585         * testsuite/20_util/synchronized_pool_resource/release.cc:
4586         Likewise.
4587         * testsuite/20_util/synchronized_pool_resource/release_single.cc:
4588         Likewise.
4589         * testsuite/20_util/unsynchronized_pool_resource/allocate-max-chunks.cc:
4590         Likewise.
4591         * testsuite/20_util/unsynchronized_pool_resource/allocate.cc:
4592         Likewise.
4593         * testsuite/20_util/unsynchronized_pool_resource/cons.cc:
4594         Likewise.
4595         * testsuite/20_util/unsynchronized_pool_resource/is_equal.cc:
4596         Likewise.
4597         * testsuite/20_util/unsynchronized_pool_resource/options.cc:
4598         Likewise.
4599         * testsuite/20_util/unsynchronized_pool_resource/release.cc:
4600         Likewise.
4601         * testsuite/21_strings/basic_string/types/pmr_typedefs.cc:
4602         Likewise.
4603         * testsuite/23_containers/deque/types/pmr_typedefs.cc: Likewise.
4604         * testsuite/23_containers/deque/types/pmr_typedefs_debug.cc:
4605         Likewise.
4606         * testsuite/23_containers/forward_list/pmr_typedefs.cc:
4607         Likewise.
4608         * testsuite/23_containers/forward_list/pmr_typedefs_debug.cc:
4609         Likewise.
4610         * testsuite/23_containers/list/pmr_typedefs.cc: Likewise.
4611         * testsuite/23_containers/list/pmr_typedefs_debug.cc: Likewise.
4612         * testsuite/23_containers/map/pmr_typedefs.cc: Likewise.
4613         * testsuite/23_containers/map/pmr_typedefs_debug.cc: Likewise.
4614         * testsuite/23_containers/multimap/pmr_typedefs.cc: Likewise.
4615         * testsuite/23_containers/multimap/pmr_typedefs_debug.cc:
4616         Likewise.
4617         * testsuite/23_containers/multiset/pmr_typedefs.cc: Likewise.
4618         * testsuite/23_containers/multiset/pmr_typedefs_debug.cc:
4619         Likewise.
4620         * testsuite/23_containers/set/pmr_typedefs.cc: Likewise.
4621         * testsuite/23_containers/set/pmr_typedefs_debug.cc: Likewise.
4622         * testsuite/23_containers/unordered_map/pmr_typedefs.cc:
4623         Likewise.
4624         * testsuite/23_containers/unordered_map/pmr_typedefs_debug.cc:
4625         Likewise.
4626         * testsuite/23_containers/unordered_multimap/pmr_typedefs.cc:
4627         Likewise.
4628         * testsuite/23_containers/unordered_multimap/pmr_typedefs_debug.cc:
4629         Likewise.
4630         * testsuite/23_containers/unordered_multiset/pmr_typedefs.cc:
4631         Likewise.
4632         * testsuite/23_containers/unordered_multiset/pmr_typedefs_debug.cc:
4633         Likewise.
4634         * testsuite/23_containers/unordered_set/pmr_typedefs.cc:
4635         Likewise.
4636         * testsuite/23_containers/unordered_set/pmr_typedefs_debug.cc:
4637         Likewise.
4638         * testsuite/23_containers/vector/pmr_typedefs.cc: Likewise.
4639         * testsuite/23_containers/vector/types/pmr_typedefs_debug.cc:
4640         Likewise.
4641         * testsuite/28_regex/match_results/pmr_typedefs.cc: Likewise.
4642
4643 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
4644
4645         * testsuite/29_atomics/atomic/69769.cc: Remove -std=gnu++17 from
4646         dg-options.
4647         * testsuite/29_atomics/atomic/is_always_lock_free.cc:
4648         * testsuite/29_atomics/atomic/requirements/typedefs.cc:
4649         * testsuite/29_atomics/atomic_integral/is_always_lock_free.cc:
4650         * testsuite/29_atomics/atomic_integral/requirements/typedefs.cc:
4651         * testsuite/30_threads/lock_guard/cons/deduction.cc: Likewise.
4652         * testsuite/30_threads/scoped_lock/cons/1.cc: Likewise.
4653         * testsuite/30_threads/scoped_lock/cons/deduction.cc: Likewise.
4654         * testsuite/30_threads/scoped_lock/requirements/explicit_instantiation.cc:
4655         Likewise.
4656         * testsuite/30_threads/scoped_lock/requirements/typedefs.cc:
4657         Likewise.
4658         * testsuite/30_threads/shared_lock/70766.cc: Likewise.
4659         * testsuite/30_threads/shared_mutex/cons/1.cc: Likewise.
4660         * testsuite/30_threads/shared_mutex/cons/assign_neg.cc:
4661         Likewise.
4662         * testsuite/30_threads/shared_mutex/cons/copy_neg.cc: Likewise.
4663         * testsuite/30_threads/shared_mutex/requirements/standard_layout.cc:
4664         Likewise.
4665         * testsuite/30_threads/shared_mutex/try_lock/1.cc: Likewise.
4666         * testsuite/30_threads/shared_mutex/try_lock/2.cc: Likewise.
4667         * testsuite/30_threads/shared_mutex/unlock/1.cc: Likewise.
4668         * testsuite/30_threads/unique_lock/cons/deduction.cc: Likewise.
4669
4670 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
4671
4672         * testsuite/20_util/any/assign/1.cc: Remove -std=gnu++17 from
4673         dg-options directive.
4674         * testsuite/20_util/any/assign/2.cc: Likewise.
4675         * testsuite/20_util/any/assign/emplace.cc: Likewise.
4676         * testsuite/20_util/any/assign/exception.cc: Likewise.
4677         * testsuite/20_util/any/assign/self.cc: Likewise.
4678         * testsuite/20_util/any/cons/1.cc: Likewise.
4679         * testsuite/20_util/any/cons/2.cc: Likewise.
4680         * testsuite/20_util/any/cons/90415.cc: Likewise.
4681         * testsuite/20_util/any/cons/92156.cc: Likewise.
4682         * testsuite/20_util/any/cons/aligned.cc: Likewise.
4683         * testsuite/20_util/any/cons/explicit.cc: Likewise.
4684         * testsuite/20_util/any/cons/in_place.cc: Likewise.
4685         * testsuite/20_util/any/cons/nontrivial.cc: Likewise.
4686         * testsuite/20_util/any/make_any.cc: Likewise.
4687         * testsuite/20_util/any/misc/any_cast.cc: Likewise.
4688         * testsuite/20_util/any/misc/any_cast_neg.cc: Likewise.
4689         * testsuite/20_util/any/misc/any_cast_no_rtti.cc: Likewise.
4690         * testsuite/20_util/any/misc/swap.cc: Likewise.
4691         * testsuite/20_util/any/modifiers/1.cc: Likewise.
4692         * testsuite/20_util/any/modifiers/83658.cc: Likewise.
4693         * testsuite/20_util/any/modifiers/92156.cc: Likewise.
4694         * testsuite/20_util/any/observers/type.cc: Likewise.
4695         * testsuite/20_util/any/requirements.cc: Likewise.
4696         * testsuite/20_util/any/typedefs.cc: Likewise.
4697         * testsuite/20_util/optional/77288.cc: Likewise.
4698         * testsuite/20_util/optional/84601.cc: Likewise.
4699         * testsuite/20_util/optional/assignment/1.cc: Likewise.
4700         * testsuite/20_util/optional/assignment/2.cc: Likewise.
4701         * testsuite/20_util/optional/assignment/3.cc: Likewise.
4702         * testsuite/20_util/optional/assignment/4.cc: Likewise.
4703         * testsuite/20_util/optional/assignment/5.cc: Likewise.
4704         * testsuite/20_util/optional/assignment/6.cc: Likewise.
4705         * testsuite/20_util/optional/assignment/7.cc: Likewise.
4706         * testsuite/20_util/optional/assignment/8.cc: Likewise.
4707         * testsuite/20_util/optional/assignment/9.cc: Likewise.
4708         * testsuite/20_util/optional/bad_access.cc: Likewise.
4709         * testsuite/20_util/optional/cons/77727.cc: Likewise.
4710         * testsuite/20_util/optional/cons/85642.cc: Likewise.
4711         * testsuite/20_util/optional/cons/copy.cc: Likewise.
4712         * testsuite/20_util/optional/cons/deduction.cc: Likewise.
4713         * testsuite/20_util/optional/cons/default.cc: Likewise.
4714         * testsuite/20_util/optional/cons/move.cc: Likewise.
4715         * testsuite/20_util/optional/cons/trivial.cc: Likewise.
4716         * testsuite/20_util/optional/cons/value.cc: Likewise.
4717         * testsuite/20_util/optional/cons/value_neg.cc: Likewise.
4718         * testsuite/20_util/optional/constexpr/cons/default.cc:
4719         Likewise.
4720         * testsuite/20_util/optional/constexpr/cons/value.cc: Likewise.
4721         * testsuite/20_util/optional/constexpr/in_place.cc: Likewise.
4722         * testsuite/20_util/optional/constexpr/make_optional.cc:
4723         Likewise.
4724         * testsuite/20_util/optional/constexpr/nullopt.cc: Likewise.
4725         * testsuite/20_util/optional/constexpr/observers/1.cc: Likewise.
4726         * testsuite/20_util/optional/constexpr/observers/2.cc: Likewise.
4727         * testsuite/20_util/optional/constexpr/observers/3.cc: Likewise.
4728         * testsuite/20_util/optional/constexpr/observers/4.cc: Likewise.
4729         * testsuite/20_util/optional/constexpr/observers/5.cc: Likewise.
4730         * testsuite/20_util/optional/constexpr/relops/1.cc: Likewise.
4731         * testsuite/20_util/optional/constexpr/relops/2.cc: Likewise.
4732         * testsuite/20_util/optional/constexpr/relops/3.cc: Likewise.
4733         * testsuite/20_util/optional/constexpr/relops/4.cc: Likewise.
4734         * testsuite/20_util/optional/constexpr/relops/5.cc: Likewise.
4735         * testsuite/20_util/optional/constexpr/relops/6.cc: Likewise.
4736         * testsuite/20_util/optional/hash.cc: Likewise.
4737         * testsuite/20_util/optional/in_place.cc: Likewise.
4738         * testsuite/20_util/optional/make_optional.cc: Likewise.
4739         * testsuite/20_util/optional/nullopt.cc: Likewise.
4740         * testsuite/20_util/optional/observers/1.cc: Likewise.
4741         * testsuite/20_util/optional/observers/2.cc: Likewise.
4742         * testsuite/20_util/optional/observers/3.cc: Likewise.
4743         * testsuite/20_util/optional/observers/4.cc: Likewise.
4744         * testsuite/20_util/optional/observers/5.cc: Likewise.
4745         * testsuite/20_util/optional/observers/6.cc: Likewise.
4746         * testsuite/20_util/optional/relops/1.cc: Likewise.
4747         * testsuite/20_util/optional/relops/2.cc: Likewise.
4748         * testsuite/20_util/optional/relops/3.cc: Likewise.
4749         * testsuite/20_util/optional/relops/4.cc: Likewise.
4750         * testsuite/20_util/optional/relops/5.cc: Likewise.
4751         * testsuite/20_util/optional/relops/6.cc: Likewise.
4752         * testsuite/20_util/optional/relops/7.cc: Likewise.
4753         * testsuite/20_util/optional/requirements.cc: Likewise.
4754         * testsuite/20_util/optional/swap/1.cc: Likewise.
4755         * testsuite/20_util/optional/swap/2.cc: Likewise.
4756         * testsuite/20_util/optional/typedefs.cc: Likewise.
4757         * testsuite/20_util/variant/80165.cc: Likewise.
4758         * testsuite/20_util/variant/85183.cc: Likewise.
4759         * testsuite/20_util/variant/86874.cc: Likewise.
4760         * testsuite/20_util/variant/87431.cc: Likewise.
4761         * testsuite/20_util/variant/87619.cc: Likewise.
4762         * testsuite/20_util/variant/91807.cc: Likewise.
4763         * testsuite/20_util/variant/any.cc: Likewise.
4764         * testsuite/20_util/variant/compile.cc: Likewise.
4765         * testsuite/20_util/variant/deduction.cc: Likewise.
4766         * testsuite/20_util/variant/exception_safety.cc: Likewise.
4767         * testsuite/20_util/variant/hash.cc: Likewise.
4768         * testsuite/20_util/variant/index_type.cc: Likewise.
4769         * testsuite/20_util/variant/relops/89851.cc: Likewise.
4770         * testsuite/20_util/variant/relops/90008.cc: Likewise.
4771         * testsuite/20_util/variant/run.cc: Likewise.
4772         * testsuite/20_util/variant/visit.cc: Likewise.
4773
4774 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
4775
4776         * testsuite/27_io/basic_filebuf/open/char/path.cc: Remove
4777         -std=gnu++17 from dg-options directive.
4778         * testsuite/27_io/basic_fstream/cons/char/path.cc: Likewise.
4779         * testsuite/27_io/basic_fstream/open/char/path.cc: Likewise.
4780         * testsuite/27_io/basic_ifstream/cons/char/path.cc: Likewise.
4781         * testsuite/27_io/basic_ifstream/open/char/path.cc: Likewise.
4782         * testsuite/27_io/basic_ofstream/cons/char/path.cc: Likewise.
4783         * testsuite/27_io/basic_ofstream/open/char/path.cc: Likewise.
4784         * testsuite/27_io/filesystem/directory_entry/86597.cc: Likewise.
4785         * testsuite/27_io/filesystem/directory_entry/lwg3171.cc:
4786         Likewise.
4787         * testsuite/27_io/filesystem/file_status/1.cc: Likewise.
4788         * testsuite/27_io/filesystem/filesystem_error/cons.cc: Likewise.
4789         * testsuite/27_io/filesystem/filesystem_error/copy.cc: Likewise.
4790         * testsuite/27_io/filesystem/iterators/91067.cc: Likewise.
4791         * testsuite/27_io/filesystem/iterators/caching.cc: Likewise.
4792         * testsuite/27_io/filesystem/iterators/directory_iterator.cc:
4793         Likewise.
4794         * testsuite/27_io/filesystem/iterators/pop.cc: Likewise.
4795         * testsuite/27_io/filesystem/iterators/recursion_pending.cc:
4796         Likewise.
4797         * testsuite/27_io/filesystem/iterators/recursive_directory_iterator.cc:
4798         Likewise.
4799         * testsuite/27_io/filesystem/operations/absolute.cc: Likewise.
4800         * testsuite/27_io/filesystem/operations/all.cc: Likewise.
4801         * testsuite/27_io/filesystem/operations/canonical.cc: Likewise.
4802         * testsuite/27_io/filesystem/operations/copy.cc: Likewise.
4803         * testsuite/27_io/filesystem/operations/copy_file.cc: Likewise.
4804         * testsuite/27_io/filesystem/operations/create_directories.cc:
4805         Likewise.
4806         * testsuite/27_io/filesystem/operations/create_directory.cc:
4807         Likewise.
4808         * testsuite/27_io/filesystem/operations/create_symlink.cc:
4809         Likewise.
4810         * testsuite/27_io/filesystem/operations/current_path.cc:
4811         Likewise.
4812         * testsuite/27_io/filesystem/operations/equivalent.cc: Likewise.
4813         * testsuite/27_io/filesystem/operations/exists.cc: Likewise.
4814         * testsuite/27_io/filesystem/operations/file_size.cc: Likewise.
4815         * testsuite/27_io/filesystem/operations/is_empty.cc: Likewise.
4816         * testsuite/27_io/filesystem/operations/last_write_time.cc:
4817         Likewise.
4818         * testsuite/27_io/filesystem/operations/permissions.cc:
4819         Likewise.
4820         * testsuite/27_io/filesystem/operations/proximate.cc: Likewise.
4821         * testsuite/27_io/filesystem/operations/read_symlink.cc:
4822         Likewise.
4823         * testsuite/27_io/filesystem/operations/relative.cc: Likewise.
4824         * testsuite/27_io/filesystem/operations/remove.cc: Likewise.
4825         * testsuite/27_io/filesystem/operations/remove_all.cc: Likewise.
4826         * testsuite/27_io/filesystem/operations/rename.cc: Likewise.
4827         * testsuite/27_io/filesystem/operations/resize_file.cc:
4828         Likewise.
4829         * testsuite/27_io/filesystem/operations/space.cc: Likewise.
4830         * testsuite/27_io/filesystem/operations/status.cc: Likewise.
4831         * testsuite/27_io/filesystem/operations/symlink_status.cc:
4832         Likewise.
4833         * testsuite/27_io/filesystem/operations/temp_directory_path.cc:
4834         Likewise.
4835         * testsuite/27_io/filesystem/operations/weakly_canonical.cc:
4836         Likewise.
4837         * testsuite/27_io/filesystem/path/append/path.cc: Likewise.
4838         * testsuite/27_io/filesystem/path/append/source.cc: Likewise.
4839         * testsuite/27_io/filesystem/path/assign/assign.cc: Likewise.
4840         * testsuite/27_io/filesystem/path/assign/copy.cc: Likewise.
4841         * testsuite/27_io/filesystem/path/compare/compare.cc: Likewise.
4842         * testsuite/27_io/filesystem/path/compare/lwg2936.cc: Likewise.
4843         * testsuite/27_io/filesystem/path/compare/path.cc: Likewise.
4844         * testsuite/27_io/filesystem/path/compare/strings.cc: Likewise.
4845         * testsuite/27_io/filesystem/path/concat/92853.cc: Likewise.
4846         * testsuite/27_io/filesystem/path/concat/94063.cc: Likewise.
4847         * testsuite/27_io/filesystem/path/concat/path.cc: Likewise.
4848         * testsuite/27_io/filesystem/path/concat/strings.cc: Likewise.
4849         * testsuite/27_io/filesystem/path/construct/80762.cc: Likewise.
4850         * testsuite/27_io/filesystem/path/construct/90281.cc: Likewise.
4851         * testsuite/27_io/filesystem/path/construct/90634.cc: Likewise.
4852         * testsuite/27_io/filesystem/path/construct/copy.cc: Likewise.
4853         * testsuite/27_io/filesystem/path/construct/default.cc:
4854         Likewise.
4855         * testsuite/27_io/filesystem/path/construct/format.cc: Likewise.
4856         * testsuite/27_io/filesystem/path/construct/locale.cc: Likewise.
4857         * testsuite/27_io/filesystem/path/construct/range.cc: Likewise.
4858         * testsuite/27_io/filesystem/path/construct/string_view.cc:
4859         Likewise.
4860         * testsuite/27_io/filesystem/path/decompose/extension.cc:
4861         Likewise.
4862         * testsuite/27_io/filesystem/path/decompose/filename.cc:
4863         Likewise.
4864         * testsuite/27_io/filesystem/path/decompose/parent_path.cc:
4865         Likewise.
4866         * testsuite/27_io/filesystem/path/decompose/relative_path.cc:
4867         Likewise.
4868         * testsuite/27_io/filesystem/path/decompose/root_directory.cc:
4869         Likewise.
4870         * testsuite/27_io/filesystem/path/decompose/root_name.cc:
4871         Likewise.
4872         * testsuite/27_io/filesystem/path/decompose/root_path.cc:
4873         Likewise.
4874         * testsuite/27_io/filesystem/path/decompose/stem.cc: Likewise.
4875         * testsuite/27_io/filesystem/path/factory/u8path-char8_t.cc:
4876         Likewise.
4877         * testsuite/27_io/filesystem/path/factory/u8path.cc: Likewise.
4878         * testsuite/27_io/filesystem/path/generation/normal.cc:
4879         Likewise.
4880         * testsuite/27_io/filesystem/path/generation/normal2.cc:
4881         Likewise.
4882         * testsuite/27_io/filesystem/path/generation/proximate.cc:
4883         Likewise.
4884         * testsuite/27_io/filesystem/path/generation/relative.cc:
4885         Likewise.
4886         * testsuite/27_io/filesystem/path/generic/94242.cc: Likewise.
4887         * testsuite/27_io/filesystem/path/generic/generic_string.cc:
4888         Likewise.
4889         * testsuite/27_io/filesystem/path/generic/utf.cc: Likewise.
4890         * testsuite/27_io/filesystem/path/generic/wchar_t.cc: Likewise.
4891         * testsuite/27_io/filesystem/path/io/dr2989.cc: Likewise.
4892         * testsuite/27_io/filesystem/path/itr/components.cc: Likewise.
4893         * testsuite/27_io/filesystem/path/itr/traversal.cc: Likewise.
4894         * testsuite/27_io/filesystem/path/modifiers/clear.cc: Likewise.
4895         * testsuite/27_io/filesystem/path/modifiers/make_preferred.cc:
4896         Likewise.
4897         * testsuite/27_io/filesystem/path/modifiers/remove_filename.cc:
4898         Likewise.
4899         * testsuite/27_io/filesystem/path/modifiers/replace_extension.cc:
4900         Likewise.
4901         * testsuite/27_io/filesystem/path/modifiers/replace_filename.cc:
4902         Likewise.
4903         * testsuite/27_io/filesystem/path/modifiers/swap.cc: Likewise.
4904         * testsuite/27_io/filesystem/path/native/alloc.cc: Likewise.
4905         * testsuite/27_io/filesystem/path/native/string-char8_t.cc:
4906         Likewise.
4907         * testsuite/27_io/filesystem/path/native/string.cc: Likewise.
4908         * testsuite/27_io/filesystem/path/nonmember/append.cc: Likewise.
4909         * testsuite/27_io/filesystem/path/nonmember/cmp.cc: Likewise.
4910         * testsuite/27_io/filesystem/path/nonmember/hash_value.cc:
4911         Likewise.
4912         * testsuite/27_io/filesystem/path/query/empty.cc: Likewise.
4913         * testsuite/27_io/filesystem/path/query/empty_neg.cc:
4914         * testsuite/27_io/filesystem/path/query/has_extension.cc:
4915         Likewise.
4916         * testsuite/27_io/filesystem/path/query/has_filename.cc:
4917         Likewise.
4918         * testsuite/27_io/filesystem/path/query/has_parent_path.cc:
4919         Likewise.
4920         * testsuite/27_io/filesystem/path/query/has_relative_path.cc:
4921         Likewise.
4922         * testsuite/27_io/filesystem/path/query/has_root_directory.cc:
4923         Likewise.
4924         * testsuite/27_io/filesystem/path/query/has_root_name.cc:
4925         Likewise.
4926         * testsuite/27_io/filesystem/path/query/has_root_path.cc:
4927         Likewise.
4928         * testsuite/27_io/filesystem/path/query/has_stem.cc: Likewise.
4929         * testsuite/27_io/filesystem/path/query/is_absolute.cc:
4930         Likewise.
4931         * testsuite/27_io/filesystem/path/query/is_relative.cc:
4932         Likewise.
4933         * testsuite/experimental/filesystem/path/construct/string_view.cc:
4934         Likewise.
4935
4936 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
4937
4938         * testsuite/20_util/specialized_algorithms/pstl/uninitialized_construct.cc:
4939         Remove -std=gnu++17 from dg-options.
4940         * testsuite/20_util/specialized_algorithms/pstl/uninitialized_copy_move.cc:
4941         Likewise.
4942         * testsuite/20_util/specialized_algorithms/pstl/uninitialized_fill_destroy.cc:
4943         Likewise.
4944         * testsuite/25_algorithms/pstl/alg_merge/inplace_merge.cc:
4945         Likewise.
4946         * testsuite/25_algorithms/pstl/alg_merge/merge.cc: Likewise.
4947         * testsuite/25_algorithms/pstl/alg_modifying_operations/copy_if.cc:
4948         Likewise.
4949         * testsuite/25_algorithms/pstl/alg_modifying_operations/copy_move.cc:
4950         Likewise.
4951         * testsuite/25_algorithms/pstl/alg_modifying_operations/fill.cc:
4952         Likewise.
4953         * testsuite/25_algorithms/pstl/alg_modifying_operations/generate.cc:
4954         Likewise.
4955         * testsuite/25_algorithms/pstl/alg_modifying_operations/is_partitioned.cc:
4956         Likewise.
4957         * testsuite/25_algorithms/pstl/alg_modifying_operations/partition.cc:
4958         Likewise.
4959         * testsuite/25_algorithms/pstl/alg_modifying_operations/partition_copy.cc:
4960         Likewise.
4961         * testsuite/25_algorithms/pstl/alg_modifying_operations/remove.cc:
4962         Likewise.
4963         * testsuite/25_algorithms/pstl/alg_modifying_operations/remove_copy.cc:
4964         Likewise.
4965         * testsuite/25_algorithms/pstl/alg_modifying_operations/replace.cc:
4966         Likewise.
4967         * testsuite/25_algorithms/pstl/alg_modifying_operations/replace_copy.cc:
4968         Likewise.
4969         * testsuite/25_algorithms/pstl/alg_modifying_operations/rotate.cc:
4970         Likewise.
4971         * testsuite/25_algorithms/pstl/alg_modifying_operations/rotate_copy.cc:
4972         Likewise.
4973         * testsuite/25_algorithms/pstl/alg_modifying_operations/swap_ranges.cc:
4974         Likewise.
4975         * testsuite/25_algorithms/pstl/alg_modifying_operations/transform_binary.cc:
4976         Likewise.
4977         * testsuite/25_algorithms/pstl/alg_modifying_operations/transform_unary.cc:
4978         Likewise.
4979         * testsuite/25_algorithms/pstl/alg_modifying_operations/unique.cc:
4980         Likewise.
4981         * testsuite/25_algorithms/pstl/alg_modifying_operations/unique_copy_equal.cc:
4982         Likewise.
4983         * testsuite/25_algorithms/pstl/alg_nonmodifying/adjacent_find.cc:
4984         Likewise.
4985         * testsuite/25_algorithms/pstl/alg_nonmodifying/all_of.cc:
4986         Likewise.
4987         * testsuite/25_algorithms/pstl/alg_nonmodifying/any_of.cc:
4988         Likewise.
4989         * testsuite/25_algorithms/pstl/alg_nonmodifying/count.cc:
4990         Likewise.
4991         * testsuite/25_algorithms/pstl/alg_nonmodifying/equal.cc:
4992         Likewise.
4993         * testsuite/25_algorithms/pstl/alg_nonmodifying/find.cc:
4994         Likewise.
4995         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_end.cc:
4996         Likewise.
4997         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_first_of.cc:
4998         Likewise.
4999         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_if.cc:
5000         Likewise.
5001         * testsuite/25_algorithms/pstl/alg_nonmodifying/for_each.cc:
5002         Likewise.
5003         * testsuite/25_algorithms/pstl/alg_nonmodifying/mismatch.cc:
5004         Likewise.
5005         * testsuite/25_algorithms/pstl/alg_nonmodifying/none_of.cc:
5006         Likewise.
5007         * testsuite/25_algorithms/pstl/alg_nonmodifying/nth_element.cc:
5008         Likewise.
5009         * testsuite/25_algorithms/pstl/alg_nonmodifying/reverse.cc:
5010         Likewise.
5011         * testsuite/25_algorithms/pstl/alg_nonmodifying/reverse_copy.cc:
5012         Likewise.
5013         * testsuite/25_algorithms/pstl/alg_nonmodifying/search_n.cc:
5014         Likewise.
5015         * testsuite/25_algorithms/pstl/alg_sorting/includes.cc:
5016         Likewise.
5017         * testsuite/25_algorithms/pstl/alg_sorting/is_heap.cc: Likewise.
5018         * testsuite/25_algorithms/pstl/alg_sorting/is_sorted.cc:
5019         Likewise.
5020         * testsuite/25_algorithms/pstl/alg_sorting/lexicographical_compare.cc:
5021         Likewise.
5022         * testsuite/25_algorithms/pstl/alg_sorting/minmax_element.cc:
5023         Likewise.
5024         * testsuite/25_algorithms/pstl/alg_sorting/partial_sort.cc:
5025         Likewise.
5026         * testsuite/25_algorithms/pstl/alg_sorting/partial_sort_copy.cc:
5027         Likewise.
5028         * testsuite/25_algorithms/pstl/alg_sorting/set.cc: Likewise.
5029         * testsuite/25_algorithms/pstl/alg_sorting/sort.cc: Likewise.
5030         * testsuite/25_algorithms/pstl/feature_test-2.cc: Likewise.
5031         * testsuite/25_algorithms/pstl/feature_test-3.cc: Likewise.
5032         * testsuite/25_algorithms/pstl/feature_test-4.cc: Likewise.
5033         * testsuite/25_algorithms/pstl/feature_test-5.cc: Likewise.
5034         * testsuite/25_algorithms/pstl/feature_test.cc: Likewise.
5035         * testsuite/26_numerics/pstl/numeric_ops/adjacent_difference.cc:
5036         Likewise.
5037         * testsuite/26_numerics/pstl/numeric_ops/reduce.cc: Likewise.
5038         * testsuite/26_numerics/pstl/numeric_ops/scan.cc: Likewise.
5039         * testsuite/26_numerics/pstl/numeric_ops/transform_reduce.cc:
5040         Likewise.
5041         * testsuite/26_numerics/pstl/numeric_ops/transform_scan.cc:
5042         Likewise.
5043
5044 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
5045
5046         * testsuite/20_util/scoped_allocator/69293_neg.cc: Add dg-error
5047         for additional errors in C++20.
5048         * testsuite/20_util/specialized_algorithms/memory_management_tools/destroy_neg.cc:
5049         Likewise.
5050         * testsuite/20_util/uses_allocator/69293_neg.cc: Likewise.
5051         * testsuite/27_io/filesystem/path/io/dr2989.cc: Likewise.
5052
5053 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
5054
5055         * testsuite/20_util/variant/compile.cc: Rename 'any' to avoid
5056         clash with std::any.
5057
5058 2021-05-07  Jonathan Wakely  <jwakely@redhat.com>
5059
5060         * include/std/istream (__rvalue_stream_extraction_t): Replace
5061         use of __rval_streamable.
5062         * include/std/ostream (__rvalue_stream_insertion_t): Likewise.
5063         (__rval_streamable): Remove.
5064         (_Require_derived_from_ios_base, __derived_from_ios_base): New
5065         helper for checking constraints.
5066         * testsuite/27_io/basic_istream/extractors_other/char/4.cc: Fix
5067         reference to the wrong subclause of the standard.
5068         * testsuite/27_io/basic_istream/extractors_other/wchar_t/4.cc:
5069         Likewise.
5070         * testsuite/27_io/basic_ostream/inserters_other/char/6.cc:
5071         Likewise.
5072         * testsuite/27_io/basic_ostream/inserters_other/wchar_t/6.cc:
5073         Likewise.
5074         * testsuite/27_io/basic_ostream/inserters_other/char/99692.cc:
5075         New test.
5076         * testsuite/27_io/filesystem/path/io/dr2989.cc: Adjust pruned
5077         errors.
5078
5079 2021-05-06  Jonathan Wakely  <jwakely@redhat.com>
5080
5081         * include/bits/stl_algobase.h (__copy_move, __copy_move_backward):
5082         Improve static_assert messages.
5083         * testsuite/25_algorithms/copy/58982.cc: Adjust expected output.
5084         * testsuite/25_algorithms/copy_n/58982.cc: Likewise.
5085
5086 2021-05-06  Patrick Palka  <ppalka@redhat.com>
5087
5088         * include/std/ranges (filter_view::_Iterator::base): Make the
5089         const& overload unconstrained and return a const reference as
5090         per LWG 3533.  Make unconditionally noexcept.
5091         (transform_view::_Iterator::base): Likewise.
5092         (elements_view::_Iterator::base): Likewise.
5093
5094 2021-05-06  Patrick Palka  <ppalka@redhat.com>
5095
5096         * include/bits/stl_iterator.h (move_iterator::base): Make the
5097         const& overload unconstrained and return a const reference as
5098         per LWG 3391.  Make unconditionally noexcept.
5099         (counted_iterator::base): Likewise.
5100         * testsuite/24_iterators/move_iterator/lwg3391.cc: New test.
5101         * testsuite/24_iterators/move_iterator/move_only.cc: Adjust
5102         has_member_base concept to decay-copy the result of base().
5103
5104 2021-05-06  Jonathan Wakely  <jwakely@redhat.com>
5105
5106         * include/std/type_traits (remove_cvref_t): Define in terms of
5107         remove_cvref.
5108         * testsuite/20_util/remove_cvref/value.cc: Check alias.
5109
5110 2021-05-06  Jonathan Wakely  <jwakely@redhat.com>
5111
5112         Revert:
5113         2021-05-05  Jonathan Wakely  <jwakely@redhat.com>
5114
5115         * include/std/charconv (__from_chars_alnum): Pass unsigned
5116         char to std::isdigit.
5117
5118 2021-05-05  Patrick Palka  <ppalka@redhat.com>
5119
5120         * include/bits/ranges_util.h (enable_borrowed_range<subrange>):
5121         Remove constraints on this partial specialization.
5122         * include/std/ranges (enable_borrowed_range<iota_view>):
5123         Likewise.
5124
5125 2021-05-05  Patrick Palka  <ppalka@redhat.com>
5126
5127         * include/std/ranges (transform_view::_Iterator::iter_swap):
5128         Remove as per LWG 3520.
5129         (join_view::_Iterator::iter_swap): Add indirectly_swappable
5130         constraint as per LWG 3517.
5131
5132 2021-05-05  Jonathan Wakely  <jwakely@redhat.com>
5133
5134         * testsuite/20_util/function_objects/invoke/3.cc: Check feature
5135         test macro.
5136         * testsuite/20_util/function_objects/invoke/version.cc: New test.
5137
5138 2021-05-05  Jonathan Wakely  <jwakely@redhat.com>
5139
5140         * include/std/charconv (__from_chars_alnum): Pass unsigned
5141         char to std::isdigit.
5142
5143 2021-05-05  Corentin Gay  <gay@adacore.com>
5144
5145         * acinclude.m4: Add VxWorks-specific case for the
5146         configuration of ctypes.
5147         * configure: Regenerate.
5148         * config/locale/vxworks/ctype_members.cc: Add VxWorks-specific
5149         version.
5150         * config/os/vxworks/ctype_base.h: Adjust for VxWorks7+.
5151         * config/os/vxworks/ctype_configure_char.cc: Likewise.
5152         * config/os/vxworks/ctype_inline.h: Likewise.
5153         * testsuite/28_regex/traits/char/isctype.cc: Defines
5154         NEWLINE_IN_CLASS_BLANK if the target is VxWorks.
5155         * testsuite/28_regex/traits/wchar_t/isctype.cc: Likewise.
5156
5157 2021-05-04  Jonathan Wakely  <jwakely@redhat.com>
5158
5159         * include/std/future (promise::set_value): Check for existence
5160         of shared state before dereferncing it.
5161         (promise::set_exception, promise::set_value_at_thread_exit)
5162         (promise::set_exception_at_thread_exit): Likewise.
5163         (promise<R&>::set_value, promise<R&>::set_exception)
5164         (promise<R&>::set_value_at_thread_exit)
5165         (promise<R&>::set_exception_at_thread_exit): Likewise.
5166         (promise<void>::set_value, promise<void>::set_exception)
5167         (promise<void>::set_value_at_thread_exit)
5168         (promise<void>::set_exception_at_thread_exit): Likewise.
5169         * testsuite/30_threads/promise/members/at_thread_exit2.cc:
5170         Remove unused variable.
5171
5172 2021-05-04  Jonathan Wakely  <jwakely@redhat.com>
5173
5174         * include/bits/basic_string.h (basic_string(const CharT*, const A&)):
5175         Do not do arithmetic on null pointer.
5176
5177 2021-05-04  Jonathan Wakely  <jwakely@redhat.com>
5178
5179         * include/ext/pb_ds/detail/cc_hash_table_map_/cc_ht_map_.hpp
5180         (find_key_pointer(key_const_reference, false_type))
5181         (find_key_pointer(key_const_reference, true_type)): Do not
5182         dereference null pointer.
5183
5184 2021-05-04  Jonathan Wakely  <jwakely@redhat.com>
5185
5186         * testsuite/20_util/from_chars/3.cc: Use unsigned type to avoid
5187         overflow.
5188         * testsuite/24_iterators/reverse_iterator/2.cc: Do not add
5189         non-zero value to null pointer.
5190         * testsuite/25_algorithms/copy_backward/move_iterators/69478.cc:
5191         Use past-the-end iterator for result.
5192         * testsuite/25_algorithms/move_backward/69478.cc: Likewise.
5193         * testsuite/25_algorithms/move_backward/93872.cc: Likewise.
5194
5195 2021-05-04  Jonathan Wakely  <jwakely@redhat.com>
5196
5197         PR libstdc++/100384
5198         * include/std/variant (__get_t): New alias template yielding the
5199         return type of std::get<N> on a variant.
5200         (__visit_result_t): New alias template yielding the result of
5201         std::visit.
5202         (__same_types): Move into namespace __detail::__variant.
5203         (__check_visitor_results): Likewise. Use __invoke_result_t and
5204         __get_t.
5205         (__check_visitor_result): Remove.
5206         (visit): Use __visit_result_t for return type.
5207         * testsuite/20_util/variant/100384.cc: New test.
5208
5209 2021-05-04  Jonathan Wakely  <jwakely@redhat.com>
5210
5211         * acinclude.m4 (GLIBCXX_ENABLE_INT128_FLOAT128): Remove
5212         checks for __int128 and rename to GLIBCXX_ENABLE_FLOAT128.
5213         * config.h.in: Regenerate.
5214         * configure: Regenerate.
5215         * configure.ac: Adjust to use GLIBCXX_ENABLE_FLOAT128.
5216         * include/bits/random.h (_Select_uint_least_t<s, 1>):
5217         Use __SIZEOF_INT128__ to decide whether to use __int128.
5218         * include/std/charconv (__to_chars_unsigned_type): Likewise.
5219
5220 2021-05-03  Gerald Pfeifer  <gerald@pfeifer.com>
5221
5222         * doc/xml/manual/ctype.xml: Move unix.org reference to https.
5223         * doc/html/manual/facets.html: Regenerate.
5224
5225 2021-04-30  Patrick Palka  <ppalka@redhat.com>
5226
5227         * include/std/ranges (__detail::__non_propating_cache): Define
5228         as per P2328.
5229         (join_view): Remove constraints on the value and reference types
5230         of the wrapped iterator type as per P2328.
5231         (join_view::_Iterator::_M_satisfy): Adjust as per P2328.
5232         (join_view::_Iterator::operator++): Likewise.
5233         (join_view::_M_inner): Use __non_propating_cache as per P2328.
5234         Remove now-redundant use of __maybe_present_t.
5235         * testsuite/std/ranges/adaptors/join.cc: Include <array>.
5236         (test10): New test.
5237
5238 2021-04-30  Jonathan Wakely  <jwakely@redhat.com>
5239
5240         * include/bits/basic_string.h (__cpp_lib_constexpr_string):
5241         Only define for C++17 and later.
5242         * include/std/version (__cpp_lib_semaphore): Fix condition
5243         to match the one in <semaphore>.
5244
5245 2021-04-30  Jonathan Wakely  <jwakely@redhat.com>
5246
5247         * acinclude.m4 (GLIBCXX_CHECK_INT64_T): Delete.
5248         * config.h.in: Regenerate.
5249         * configure: Regenerate.
5250         * configure.ac: Do not use GLIBCXX_CHECK_INT64_T.
5251         * include/bits/postypes.h: Remove include of <stdint.h> and
5252         definition/undefinition of the __STDC_LIMIT_MACROS and
5253         __STDC_CONSTANT_MACROS macros.
5254         (streamoff): Use __INT64_TYPE__ if defined.
5255
5256 2021-04-30  Patrick Palka  <ppalka@redhat.com>
5257
5258         * include/std/ranges (split_view::_InnerIter::operator++):
5259         Depend on _Base instead of _Vp directly, as per LWG 3532.
5260
5261 2021-04-30  Patrick Palka  <ppalka@redhat.com>
5262
5263         * include/bits/ranges_util.h (subrange::subrange): Avoid
5264         list-initialization in delegating constructor.
5265         * include/std/ranges (single_view): Replace implicit guide
5266         with explicit deduction guide that decays its argument.
5267         (_Single::operator()): Avoid CTAD when constructing the
5268         single_view object.
5269         (_Iota::operator()): Avoid list-initialization.
5270         (__detail::__can_filter_view, _Filter::operator()): Likewise.
5271         (__detail::__can_transform_view, _Transform::operator()): Likewise.
5272         (take_view::begin): Likewise.
5273         (__detail::__can_take_view, _Take::operator()): Likewise.
5274         (__detail::__can_take_while_view, _TakeWhile::operator()): Likewise.
5275         (__detail::__can_drop_view, _Drop::operator()): Likewise.
5276         (__detail::__can_drop_while_view, _DropWhile::operator()): Likewise.
5277         (split_view::split_view): Use views::single when initializing
5278         _M_pattern.
5279         (__detail::__can_split_view, _Split::operator()): Avoid
5280         list-initialization.
5281         (_Counted::operator()): Likewise.
5282         * testsuite/std/ranges/p2367.cc: New test.
5283
5284 2021-04-30  Jonathan Wakely  <jwakely@redhat.com>
5285
5286         PR libstdc++/60497
5287         * include/bits/basic_ios.tcc (basic_ios::copyfmt): use
5288         std::addressof.
5289         * include/bits/basic_string.tcc (basic_string::swap)
5290         (basic_string::assign): Likewise.
5291         * include/bits/deque.tcc (deque::operator=(const deque&)):
5292         Likewise.
5293         * include/bits/stl_tree.h (_Rb_tree::operator=(const * _Rb_tree&)):
5294         Likewise.
5295         * include/bits/vector.tcc (vector::operator=(const vector&)):
5296         Likewise.
5297
5298 2021-04-30  Jonathan Wakely  <jwakely@redhat.com>
5299
5300         * include/std/istream (operator>>(Istream&&, x&)): Simplify, as
5301         per LWG 1203.
5302         * include/std/ostream (operator<<(Ostream&&, const x&)):
5303         Likewise.
5304         * testsuite/27_io/basic_istream/extractors_character/char/lwg2499_neg.cc:
5305         Adjust dg-error pattern.
5306         * testsuite/27_io/basic_istream/extractors_character/wchar_t/lwg2499_neg.cc:
5307         Likewise.
5308         * testsuite/27_io/basic_istream/extractors_other/char/4.cc: Define
5309         is_extractable trait to replace std::__is_extractable. Make it
5310         work with rvalue streams as well as lvalues, to replace f() and
5311         g() helper functions.
5312         * testsuite/27_io/basic_istream/extractors_other/wchar_t/4.cc:
5313         Likewise.
5314         * testsuite/27_io/basic_ostream/inserters_other/char/6.cc:
5315         Define is_insertable trait to replace std::__is_insertable. Make
5316         it work with rvalue streams as well as lvalues, to replace f()
5317         and g() helper functions.
5318         * testsuite/27_io/basic_ostream/inserters_other/wchar_t/6.cc:
5319         Likewise.
5320         * testsuite/27_io/filesystem/path/io/dr2989.cc: Prune additional
5321         errors from new constraints.
5322         * testsuite/27_io/rvalue_streams-2.cc: Remove PR 80675 checks,
5323         which are no longer expected to compile.
5324         * testsuite/27_io/rvalue_streams.cc: Adjust existing test.
5325         Verify LWG 1203 changes.
5326
5327 2021-04-30  Jonathan Wakely  <jwakely@redhat.com>
5328
5329         PR libstdc++/100285
5330         * include/experimental/socket (__basic_socket_impl::set_option)
5331         (__basic_socket_impl::get_option) [!_GLIBCXX_HAVE_SYS_SOCKET_H]:
5332         Just set error code.
5333         * testsuite/experimental/net/socket/socket_base.cc: CHeck
5334         for <sys/socket.h> not <socket.h>.
5335
5336 2021-04-30  Jonathan Wakely  <jwakely@redhat.com>
5337
5338         PR libstdc++/100180
5339         PR libstdc++/100286
5340         PR libstdc++/100351
5341         * testsuite/experimental/net/internet/address/v4/comparisons.cc:
5342         Use new effective-target keyword.
5343         * testsuite/experimental/net/internet/address/v4/cons.cc:
5344         Likewise.
5345         * testsuite/experimental/net/internet/address/v4/creation.cc:
5346         Likewise.
5347         * testsuite/experimental/net/internet/address/v4/members.cc:
5348         Likewise.
5349         * testsuite/experimental/net/internet/address/v6/members.cc:
5350         Likewise.
5351         * testsuite/experimental/net/internet/resolver/base.cc:
5352         Likewise.
5353         * testsuite/experimental/net/internet/resolver/ops/lookup.cc:
5354         Likewise.
5355         * testsuite/experimental/net/internet/resolver/ops/reverse.cc:
5356         Likewise.
5357         * testsuite/experimental/net/internet/socket/opt.cc:
5358         Likewise.
5359         * testsuite/experimental/net/internet/tcp.cc:
5360         Likewise.
5361         * testsuite/experimental/net/internet/udp.cc:
5362         Likewise.
5363         * testsuite/lib/libstdc++.exp (check_effective_target_net_ts_ip):
5364         New proc to check net_ts_ip et.
5365
5366 2021-04-28  Jonathan Wakely  <jwakely@redhat.com>
5367
5368         PR libstdc++/97930
5369         * testsuite/20_util/pair/requirements/structural.cc: New test.
5370
5371 2021-04-28  Jonathan Wakely  <jwakely@redhat.com>
5372
5373         * include/bits/stl_pair.h (pair) [__cplusplus > 202002]: Add
5374         new definitions for constructors and assignment operators using
5375         concepts for constraints.
5376         * testsuite/20_util/pair/cons/99957.cc: Disable for C++20 and
5377         later.
5378         * testsuite/20_util/pair/cons/explicit_construct.cc: Adjust
5379         expected error messages to also match C++20 errors.
5380
5381 2021-04-28  Jonathan Wakely  <jwakely@redhat.com>
5382
5383         PR libstdc++/99957
5384         * include/bits/stl_pair.h (_PCC::_MoveCopyPair, _PCC::_CopyMovePair):
5385         Combine and replace with ...
5386         (_PCC::_DeprConsPair): New SFINAE helper function.
5387         (pair): Merge preprocessor blocks so that all C++03 members
5388         are defined together at the end.
5389         (pair::pair(const _T1&, _U2&&), pair::pair(_U1&&, const _T2&)):
5390         Replace _T1 and _T2 parameters with __null_ptr_constant and
5391         adjust constraints.
5392         * testsuite/20_util/pair/40925.cc: Use nullptr instead of 0.
5393         * testsuite/20_util/pair/cons/explicit_construct.cc: Likewise.
5394         * testsuite/20_util/pair/cons/99957.cc: New test.
5395
5396 2021-04-28  Jonathan Wakely  <jwakely@redhat.com>
5397
5398         * include/bits/basic_string.h (__cpp_lib_constexpr_string): Define.
5399         * include/std/version (__cpp_lib_constexpr_string): Define.
5400         * testsuite/21_strings/char_traits/requirements/constexpr_functions_c++17.cc:
5401         Check for __cpp_lib_constexpr_string.
5402         * testsuite/21_strings/char_traits/requirements/constexpr_functions_c++20.cc:
5403         Likewise.
5404         * testsuite/21_strings/char_traits/requirements/version.cc: New test.
5405
5406 2021-04-28  Jonathan Wakely  <jwakely@redhat.com>
5407
5408         * doc/Makefile.am (stamp-pdf-doxygen): Improve comment about
5409         dealing with errors. Use '@' to prevent shell command being
5410         echoed.
5411         * doc/Makefile.in: Regenerate.
5412
5413 2021-04-28  Jonathan Wakely  <jwakely@redhat.com>
5414
5415         PR libstdc++/100298
5416         * include/bits/std_thread.h (thread::hardware_concurrency): Add
5417         missing noexcept to inline definition for non-gthreads targets.
5418
5419 2021-04-28  Patrick Palka  <ppalka@redhat.com>
5420
5421         PR libstdc++/100187
5422         PR libstdc++/100237
5423         PR libstdc++/100249
5424         PR libstdc++/100287
5425         * include/bits/ranges_algo.h (__search_n_fn::operator()): Give
5426         the __value_comp lambda an explicit bool return type.
5427         (__is_permutation_fn::operator()): Give the __proj_scan local
5428         variable auto&& return type.  Give the __comp_scan lambda an
5429         explicit bool return type.
5430         (__remove_fn::operator()): Give the __pred lambda an explicit
5431         bool return type.
5432         (__partition_fn::operator()): Don't std::move __first twice
5433         when returning an empty subrange.
5434         (__min_fn::operator()): Don't std::move __comp.
5435         (__max_fn::operator()): Likewise.
5436         (__minmax_fn::operator()): Likewise.
5437
5438 2021-04-27  Patrick Palka  <ppalka@redhat.com>
5439
5440         PR libstdc++/100290
5441         * include/std/ranges (join_view::_Iterator::operator++): Correct
5442         the return type of the lambda to avoid returning a copy of
5443         _M_parent->_M_inner.
5444         * testsuite/std/ranges/adaptors/join.cc (test10): New test.
5445
5446 2021-04-27  Jakub Jelinek  <jakub@redhat.com>
5447
5448         Revert:
5449         2021-04-22  Jakub Jelinek  <jakub@redhat.com>
5450
5451         PR target/100182
5452         * testsuite/29_atomics/atomic_float/1.cc: Add dg-xfail-run-if for
5453         ia32.
5454         * testsuite/29_atomics/atomic_float/wait_notify.cc: Add dg-skip-if for
5455         ia32.
5456
5457 2021-04-27  Jonathan Wakely  <jwakely@redhat.com>
5458
5459         * include/experimental/internet (address_v6::bytes_type): Adjust
5460         formatting.
5461         (basic_endpoint): Define _M_is_v6() to put all checks for
5462         AF_INET6 in one place.
5463         (basic_endpoint::resize): Simplify.
5464         (operator==(const tcp&, const tcp&)): Add constexpr and noexcept.
5465         (operator!=(const tcp&, const tcp&)): Likewise.
5466         (operator==(const udp&, const udp&)): Likewise.
5467         (operator!=(const udp&, const udp&)): Likewise.
5468         * testsuite/experimental/net/internet/tcp.cc: New test.
5469         * testsuite/experimental/net/internet/udp.cc: New test.
5470
5471 2021-04-27  Jonathan Wakely  <jwakely@redhat.com>
5472
5473         PR libstdc++/100286
5474         * include/experimental/internet (resolver_errc, resolver_category())
5475         (make_error_code, make_error_condition): Define unconditionally,
5476         only make enumerators and use of gai_strerror depend on the
5477         availability of <netdb.h>.
5478         (address_v4::to_string): Use correct constant for string length.
5479         (address_v4::to_string, address_v6::to_string): Define
5480         unconditionally, throw if unsupported.
5481         (make_address_v4, make_address_v6): Define unconditionally.
5482         Return an error if unsupported.
5483         (tcp, udp, v6_only, unicast::hops, multicast::*): Define
5484         conditionally,
5485         * testsuite/experimental/net/internet/socket/opt.cc: Check for
5486         <netinet/in.h> and <netinet/tcp.h> before using types from
5487         namespace net::ip.
5488
5489 2021-04-27  Jonathan Wakely  <jwakely@redhat.com>
5490
5491         PR libstdc++/100285
5492         * include/experimental/internet (resolver_base::flags):
5493         Define overloaded operators as hidden friends.
5494         * include/experimental/socket (socket_base::message_flags):
5495         Likewise.
5496
5497 2021-04-26  Jonathan Wakely  <jwakely@redhat.com>
5498
5499         * include/experimental/internet (tcp::no_delay, v6_only)
5500         (unicast::hops, multicast::hops, multicast::enable_loopback):
5501         Change access of base class and static data members. Add
5502         using-declaration for __socket_crtp::operator=(_Tp).
5503         (multicast::__mcastopt): New type.
5504         (multicast::join_group, multicast::leave_group): Derive from
5505         __mcastopt for common implementation.
5506         * include/experimental/socket: Add comment.
5507         * testsuite/experimental/net/internet/socket/opt.cc: New test.
5508         * testsuite/experimental/net/socket/socket_base.cc: Check for
5509         protected constructor/destructor of socket_base. Check for
5510         explicit constructors of socket option classes.
5511
5512 2021-04-26  Jonathan Wakely  <jwakely@redhat.com>
5513
5514         * include/experimental/bits/net.h (__socket_base): Add
5515         bool template parameter to allow BooleanSocketOption and
5516         IntegerSocketOption to have different __socket_base<int>
5517         base classes.
5518         (__socket_base<bool>): Adjust base class.
5519         (__socket_base<int>): Add partial specialization.
5520         (__socket_crtp::operator=(_Tp)): Add noexcept-specifier.
5521         * include/experimental/socket (socket_base::broadcast)
5522         (socket_base::debug, socket_base::do_not_route)
5523         (socket_base::keep_alive, socket_base::linger)
5524         (socket_base::out_of_band_inline)
5525         (socket_base::receive_buffer_size)
5526         (socket_base::receive_low_watermark)
5527         (socket_base::reuse_address, socket_base::send_buffer_size)
5528         (socket_base::send_low_watermark): Add using-declaration for
5529         __socket_crtp::operator=(_Tp).
5530         * testsuite/experimental/net/socket/socket_base.cc: Check
5531         properties of socket option types.
5532
5533 2021-04-26  Jonathan Wakely  <jwakely@redhat.com>
5534
5535         * include/experimental/internet (resolver_base::flags): Remove
5536         enumerators. Initialize constants directly with desired values.
5537         Make all operators constexpr and noexcept.
5538         * testsuite/experimental/net/internet/resolver/base.cc: Use
5539         __gnu_test::test_bitmask_values for bitmask type. Check
5540         construction and destruction is protected.
5541
5542 2021-04-26  Jonathan Wakely  <jwakely@redhat.com>
5543
5544         * include/bits/semaphore_base.h: Include <exception> and <errno.h>.
5545
5546 2021-04-26  Jonathan Wakely  <jwakely@redhat.com>
5547
5548         PR libstdc++/100259
5549         * include/experimental/internet (net::ip::make_error_code)
5550         (net::ip::make_error_condition, net::ip::make_network_v4)
5551         (net::ip::operator==(const udp&, const udp&)): Add 'inline'.
5552
5553 2021-04-24  David Edelsohn  <dje.gcc@gmail.com>
5554
5555         * testsuite/lib/dg-options.exp (atomic_link_flags): New.
5556         (add_options_for_libatomic): Use atomic_link_flags.
5557
5558 2021-04-23  Jonathan Wakely  <jwakely@redhat.com>
5559
5560         PR libstdc++/100180
5561         * include/experimental/io_context (io_context): Define
5562         dummy_pollfd type so that most member functions still compile
5563         without <poll.h> and struct pollfd.
5564
5565 2021-04-23  Jonathan Wakely  <jwakely@redhat.com>
5566
5567         * include/experimental/io_context (io_context::async_wait): Add
5568         comment.
5569         * include/experimental/socket (basic_socket::async_connect):
5570         Cast wait_type constant to int.
5571         (basic_datagram_socket::async_receive): Likewise.
5572         (basic_datagram_socket::async_receive_from): Likewise.
5573         (basic_datagram_socket::async_send): Likewise.
5574         (basic_datagram_socket::async_send_to): Likewise.
5575         (basic_stream_socket::async_receive): Likewise.
5576         (basic_stream_socket::async_send): Likewise. Use io_context
5577         parameter directly, instead of via an executor.
5578         (basic_socket_acceptor::async_accept): Likewise.
5579
5580 2021-04-23  Jonathan Wakely  <jwakely@redhat.com>
5581
5582         * include/experimental/socket (socket_base::shutdown_type):
5583         (socket_base::wait_type, socket_base::message_flags):
5584         Remove enumerators. Initialize constants directly with desired
5585         values.
5586         (socket_base::message_flags): Make all operators constexpr and
5587         noexcept.
5588         * testsuite/util/testsuite_common_types.h (test_bitmask_values):
5589         New test utility.
5590         * testsuite/experimental/net/socket/socket_base.cc: New test.
5591
5592 2021-04-22  David Edelsohn  <dje.gcc@gmail.com>
5593
5594         * config/os/aix/atomicity.h: Delete.
5595
5596 2021-04-22  Jonathan Wakely  <jwakely@redhat.com>
5597
5598         * include/bits/atomic_timed_wait.h (__cond_wait_until_impl):
5599         Handle system_clock as well as steady_clock.
5600         * testsuite/30_threads/semaphore/try_acquire_for.cc: Re-enable.
5601         * testsuite/30_threads/semaphore/try_acquire_until.cc:
5602         Re-enable.
5603
5604 2021-04-22  Jonathan Wakely  <jwakely@redhat.com>
5605
5606         * testsuite/30_threads/semaphore/try_acquire_posix.cc: Add
5607         options for libatomic.
5608
5609 2021-04-22  Jonathan Wakely  <jwakely@redhat.com>
5610
5611         * config/os/gnu-linux/os_defines.h: Fix type in comment.
5612
5613 2021-04-22  Jonathan Wakely  <jwakely@redhat.com>
5614
5615         PR libstdc++/99006
5616         * include/bits/shared_ptr.h (allocate_shared): Assert that _Tp
5617         is not an array type.
5618         * include/bits/shared_ptr_base.h (__allocate_shared): Likewise.
5619         * testsuite/20_util/shared_ptr/creation/99006.cc: New test.
5620
5621 2021-04-22  Thomas Rodgers  <rodgert@twrodgers.com>
5622
5623         * include/bits/atomic_wait.h: Always notify waiters in the
5624         case of 'bare' address notification.
5625
5626 2021-04-22  Jakub Jelinek  <jakub@redhat.com>
5627
5628         PR target/100182
5629         * testsuite/29_atomics/atomic_float/1.cc: Add dg-xfail-run-if for
5630         ia32.
5631         * testsuite/29_atomics/atomic_float/wait_notify.cc: Add dg-skip-if for
5632         ia32.
5633
5634 2021-04-22  Jonathan Wakely  <jwakely@redhat.com>
5635
5636         PR libstdc++/100179
5637         * include/bits/semaphore_base.h: Remove #error.
5638         * include/std/semaphore: Do not define anything unless one of
5639         the implementations is available.
5640
5641 2021-04-21  Thomas Rodgers  <rodgert@twrodgers.com>
5642
5643         * include/bits/semaphore_base.h: Always reload __old in
5644         __atomic_semaphore::_S_do_try_acquire().
5645         * testsuite/30_threads/stop_token/stop_callback/destroy.cc:
5646         re-enable testcase.
5647
5648 2021-04-21  Philippe Blain  <levraiphilippeblain@gmail.com>
5649             Jonathan Wakely  <jwakely@redhat.com>
5650
5651         PR libstdc++/99453
5652         * python/Makefile.am: Install libstdc++*-gdb.py more robustly.
5653         * python/Makefile.in: Regenerate.
5654
5655 2021-04-21  Thomas Rodgers  <rodgert@twrodgers.com>
5656
5657         * include/bits/semaphore_base.h: Add missing _M_try_acquire()
5658         member to __platform_wait.
5659
5660 2021-04-21  Jonathan Wakely  <jwakely@redhat.com>
5661
5662         * include/std/latch: Replace tab characters in license text.
5663         * include/std/semaphore: Likewise.
5664
5665 2021-04-21  Jakub Jelinek  <jakub@redhat.com>
5666
5667         PR libstdc++/100164
5668         * acinclude.m4: For POSIX semaphores AC_DEFINE HAVE_POSIX_SEMAPHORE
5669         rather than _GLIBCXX_HAVE_POSIX_SEMAPHORE.
5670         * configure: Regenerated.
5671         * config.h.in: Regenerated.
5672
5673 2021-04-20  Jonathan Wakely  <jwakely@redhat.com>
5674
5675         * testsuite/30_threads/semaphore/try_acquire_for.cc: Disable
5676         test for targets not using futexes for semaphores.
5677         * testsuite/30_threads/semaphore/try_acquire_until.cc: Likewise.
5678         * testsuite/30_threads/stop_token/stop_callback/destroy.cc:
5679         Disable for all targets.
5680
5681 2021-04-20  Thomas Rodgers  <trodgers@redhat.com>
5682
5683         * include/Makefile.am: Add new <bits/this_thread_sleep.h> header.
5684         * include/Makefile.in: Regenerate.
5685         * include/bits/this_thread_sleep.h: New file.
5686         * include/bits/atomic_base.h: Adjust all calls
5687         to __atomic_wait/__atomic_notify for new call signatures.
5688         * include/bits/atomic_timed_wait.h: Extensive rewrite.
5689         * include/bits/atomic_wait.h: Likewise.
5690         * include/bits/semaphore_base.h: Adjust all calls
5691         to __atomic_wait/__atomic_notify for new call signatures.
5692         * include/std/atomic: Likewise.
5693         * include/std/barrier: Likewise.
5694         * include/std/latch: Likewise.
5695         * include/std/semaphore: Likewise.
5696         * include/std/thread (this_thread::sleep_for)
5697         (this_thread::sleep_until): Move to new header.
5698         * testsuite/29_atomics/atomic/wait_notify/bool.cc: Simplify
5699         test.
5700         * testsuite/29_atomics/atomic/wait_notify/generic.cc: Likewise.
5701         * testsuite/29_atomics/atomic/wait_notify/pointers.cc: Likewise.
5702         * testsuite/29_atomics/atomic_flag/wait_notify/1.cc: Likewise.
5703         * testsuite/29_atomics/atomic_float/wait_notify.cc: Likewise.
5704         * testsuite/29_atomics/atomic_integral/wait_notify.cc: Likewise.
5705         * testsuite/29_atomics/atomic_ref/wait_notify.cc: Likewise.
5706
5707 2021-04-20  Patrick Palka  <ppalka@redhat.com>
5708
5709         PR libstdc++/95983
5710         * include/bits/stl_iterator.h (__detail::__move_iter_cat):
5711         Define.
5712         (move_iterator): Derive from the above in C++20 in order to
5713         conditionally define iterator_category as per P2259.
5714         (move_iterator::__base_cat): No longer used, so remove.
5715         (move_iterator::iterator_category): Remove in C++20.
5716         (__detail::__common_iter_use_postfix_proxy): Define.
5717         (common_iterator::_Proxy): Rename to ...
5718         (common_iterator:__arrow_proxy): ... this.
5719         (common_iterator::__postfix_proxy): Define as per P2259.
5720         (common_iterator::operator->): Adjust.
5721         (common_iterator::operator++): Adjust as per P2259.
5722         (iterator_traits<common_iterator>::_S_iter_cat): Define.
5723         (iterator_traits<common_iterator>::iterator_category): Change as
5724         per P2259.
5725         (__detail::__counted_iter_value_type): Define.
5726         (__detail::__counted_iter_concept): Define.
5727         (__detail::__counted_iter_cat): Define.
5728         (counted_iterator): Derive from the above three classes in order
5729         to conditionally define value_type, iterator_concept and
5730         iterator category respectively as per P2259.
5731         (counted_iterator::operator->): Define as per P2259.
5732         (incrementable_traits<counted_iterator>): Remove as per P2259.
5733         (iterator_traits<counted_iterator>): Adjust as per P2259.
5734         * include/std/ranges (__detail::__iota_view_iter_cat): Define.
5735         (iota_view::_Iterator): Derive from the above in order to
5736         conditionally define iterator_category as per P2259.
5737         (iota_view::_S_iter_cat): Rename to ...
5738         (iota_view::_S_iter_concept): ... this.
5739         (iota_view::iterator_concept): Use it to apply LWG 3291 changes.
5740         (iota_view::iterator_category): Remove.
5741         (__detail::__filter_view_iter_cat): Define.
5742         (filter_view::_Iterator): Derive from the above in order to
5743         conditionally define iterator_category as per P2259.
5744         (filter_view::_Iterator): Move to struct __filter_view_iter_cat.
5745         (filter_view::_Iterator::iterator_category): Remove.
5746         (transform_view::_Base): Define.
5747         (transform_view::__iter_cat): Define.
5748         (transform_view::_Iterator): Derive from the above in order to
5749         conditionally define iterator_category as per P2259.
5750         (transform_view::_Iterator::_Base): Just alias
5751         transform_view::_Base.
5752         (transform_view::_Iterator::_S_iter_cat): Move to struct
5753         transform_view::__iter_cat.
5754         (transform_view::_Iterator::iterator_category): Remove.
5755         (transform_view::_Sentinel::_Base): Just alias
5756         transform_view::_Base.
5757         (join_view::_Base): Define.
5758         (join_view::_Outer_iter): Define.
5759         (join_view::_Inner_iter): Define.
5760         (join_view::_S_ref_is_glvalue): Define.
5761         (join_view::__iter_cat): Define.
5762         (join_view::_Iterator): Derive from it in order to conditionally
5763         define iterator_category as per P2259.
5764         (join_view::_Iterator::_Base): Just alias join_view::_Base.
5765         (join_view::_Iterator::_S_ref_is_glvalue): Just alias
5766         join_view::_S_ref_is_glvalue.
5767         (join_view::_Iterator::_S_iter_cat): Move to struct
5768         transform_view::__iter_cat.
5769         (join_view::_Iterator::_Outer_iter): Just alias
5770         join_view::_Outer_iter.
5771         (join_view::_Iterator::_Inner_iter): Just alias
5772         join_view::_Inner_iter.
5773         (join_view::_Iterator::iterator_category): Remove.
5774         (join_view::_Sentinel::_Base): Just alias join_view::_Base.
5775         (__detail::__split_view_outer_iter_cat): Define.
5776         (__detail::__split_view_inner_iter_cat): Define.
5777         (split_view::_Base): Define.
5778         (split_view::_Outer_iter): Derive from __split_view_outer_iter_cat
5779         in order to conditionally define iterator_category as per P2259.
5780         (split_view::_Outer_iter::iterator_category): Remove.
5781         (split_view::_Inner_iter): Derive from __split_view_inner_iter_cat
5782         in order to conditionally define iterator_category as per P2259.
5783         (split_view::_Inner_iter::_S_iter_cat): Move to
5784         __split_view_inner_iter_cat.
5785         (split_view::_Inner_iter::iterator_category): Remove.
5786         (elements_view::_Base): Define.
5787         (elements_view::__iter_cat): Define.
5788         (elements_view::_Iterator): Derive from the above in order to
5789         conditionall define iterator_category as per P2259.
5790         (elements_view::_Iterator::_Base): Just alias
5791         elements_view::_Base.
5792         (elements_view::_Iterator::_S_iter_concept)
5793         (elements_view::_Iterator::iterator_concept): Define as per
5794         P2259.
5795         (elements_view::_Iterator::iterator_category): Remove.
5796         (elements_view::_Sentinel::_Base): Just alias
5797         elements_view::_Base.
5798         * testsuite/24_iterators/headers/iterator/synopsis_c++20.cc:
5799         Adjust constraints on iterator_traits<counted_iterator>.
5800         * testsuite/std/ranges/p2259.cc: New test.
5801
5802 2021-04-20  Jonathan Wakely  <jwakely@redhat.com>
5803
5804         PR libstdc++/100146
5805         * include/std/charconv (__cpp_lib_to_chars): Define
5806         conditionally.
5807         * include/std/version (__cpp_lib_to_chars): Likewise..
5808         * testsuite/20_util/from_chars/4.cc: Only check feature test
5809         macro, not _GLIBCXX_HAVE_USELOCALE.
5810         * testsuite/20_util/from_chars/5.cc: Likewise.
5811         * testsuite/20_util/from_chars/6.cc: Likewise.
5812         * testsuite/20_util/to_chars/long_double.cc: Likewise.
5813
5814 2021-04-20  Jakub Jelinek  <jakub@redhat.com>
5815
5816         * testsuite/util/testsuite_abi.cc (compare_symbols): If any symbol
5817         versions with _IEEE128_ substring are found, set ieee_version_found
5818         to true.  Ignore missing symbols with _IEEE128_ in version name if
5819         !ieee_version_found.  Use i->first as version_name instead of
5820         i->second.version_name if the latter is empty.
5821         * config/abi/post/powerpc64-linux-gnu/baseline_symbols.txt: Update.
5822
5823 2021-04-19  H.J. Lu  <hjl.tools@gmail.com>
5824
5825         * config/abi/post/x86_64-linux-gnu/x32/baseline_symbols.txt:
5826         Updated.
5827
5828 2021-04-17  Jakub Jelinek  <jakub@redhat.com>
5829
5830         * config/abi/post/powerpc-linux-gnu/baseline_symbols.txt: Update.
5831         * config/abi/post/powerpc64-linux-gnu/32/baseline_symbols.txt: Update.
5832
5833 2021-04-17  Jakub Jelinek  <jakub@redhat.com>
5834
5835         * config/abi/post/x86_64-linux-gnu/baseline_symbols.txt: Update.
5836         * config/abi/post/x86_64-linux-gnu/32/baseline_symbols.txt: Update.
5837         * config/abi/post/i386-linux-gnu/baseline_symbols.txt: Update.
5838         * config/abi/post/i486-linux-gnu/baseline_symbols.txt: Update.
5839         * config/abi/post/s390x-linux-gnu/baseline_symbols.txt: Update.
5840         * config/abi/post/powerpc64-linux-gnu/baseline_symbols.txt: Update.
5841
5842 2021-04-15  Jonathan Wakely  <jwakely@redhat.com>
5843
5844         * testsuite/lib/dg-options.exp (add_options_for_libatomic): Also
5845         add libatomic options for 32-bit sparc*-*-linux-gnu.
5846
5847 2021-04-15  Jonathan Wakely  <jwakely@redhat.com>
5848
5849         PR libstdc++/96657
5850         * libsupc++/Makefile.am: Add atomicity.cc here.
5851         * src/c++98/Makefile.am: Remove it from here.
5852         * libsupc++/Makefile.in: Regenerate.
5853         * src/c++98/Makefile.in: Regenerate.
5854         * testsuite/18_support/exception_ptr/96657.cc: New test.
5855
5856 2021-04-13  Jonathan Wakely  <jwakely@redhat.com>
5857
5858         PR libstdc++/100060
5859         * include/std/bit: Only include <ext/numeric_traits.h> for
5860         hosted build, use <limits> otherwise.
5861
5862 2021-04-13  Jonathan Wakely  <jwakely@redhat.com>
5863
5864         * doc/xml/manual/backwards_compatibility.xml: Remove porting
5865         notes for libg++ and libstdc++-v2, and bibliography.
5866         * doc/html/*: Regenerated.
5867
5868 2021-04-12  Jonathan Wakely  <jwakely@redhat.com>
5869
5870         PR libstdc++/100044
5871         * include/bits/ranges_util.h (__detail::__iterator_sentinel_pair):
5872         Remove helper concept.
5873         (subrange(_Pr), subrange(Pr, __make_unsigned_like<...>)): Remove
5874         deduction guides, as per LWG 3404.
5875         * testsuite/std/ranges/subrange/lwg3282_neg.cc: Check that class
5876         template argument deduction fails.
5877
5878 2021-04-12  Jonathan Wakely  <jwakely@redhat.com>
5879
5880         * testsuite/26_numerics/random/linear_congruential_engine/requirements/non_uint_neg.cc:
5881         Adjust expected error for C++20 mode.
5882         * testsuite/tr1/5_numerical_facilities/random/linear_congruential/requirements/non_uint_neg.cc:
5883         Likewise.
5884
5885 2021-04-12  Jonathan Wakely  <jwakely@redhat.com>
5886
5887         PR libstdc++/99995
5888         * testsuite/17_intro/headers/c++1998/49745.cc: Include all
5889         standard headers and XFAIL for effective-target c++20.
5890
5891 2021-04-09  François Dumont  <fdumont@gcc.gnu.org>
5892
5893         PR libstdc++/99402
5894         * include/debug/helper_functions.h (__can_advance(_InputIterator,
5895         const std::pair<_Diff, _Distance_precision>&, int)): New.
5896         (__can_advance(const _Safe_iterator<>&,
5897         const std::pair<_Diff, _Distance_precision>&, int)): New.
5898         * include/debug/macros.h (__glibcxx_check_can_increment_dist): New,
5899         use latter.
5900         (__glibcxx_check_can_increment_range): Adapt to use latter.
5901         (__glibcxx_check_can_decrement_range): Likewise.
5902         * include/debug/safe_iterator.h
5903         (_Safe_iterator<>::_M_can_advance(const std::pair<_Diff, _Distance_precision>&,
5904         int)): New.
5905         (__can_advance(const _Safe_iterator<>&,
5906         const std::pair<_Diff, _Distance_precision>&, int)): New.
5907         * include/debug/safe_iterator.tcc
5908         (_Safe_iterator<>::_M_can_advance(const std::pair<_Diff, _Distance_precision>&,
5909         int)): New.
5910         (_Safe_iterator<>::_M_valid_range(const _Safe_iterator<>&,
5911         std::pair<difference_type, _Distance_precision>&, bool)): Adapt for
5912         __dp_sign_max_size.
5913         (__copy_move_a): Adapt to use __glibcxx_check_can_increment_dist.
5914         (__copy_move_backward_a): Likewise.
5915         (__equal_aux): Likewise.
5916         * include/debug/stl_iterator.h (__can_advance(const std::reverse_iterator<>&,
5917         const std::pair<_Diff, _Distance_precision>&, int)): New.
5918         (__can_advance(const std::move_iterator<>&,
5919         const std::pair<_Diff, _Distance_precision>&, int)): New.
5920         * testsuite/25_algorithms/copy/debug/99402.cc: New test.
5921
5922 2021-04-09  Jonathan Wakely  <jwakely@redhat.com>
5923
5924         PR libstdc++/99985
5925         * include/bits/hashtable.h (_Hashtable::_S_nothrow_move()): Fix
5926         to be a valid constexpr function in C++11.
5927         * testsuite/23_containers/unordered_set/cons/99985.cc: New test.
5928
5929 2021-04-09  Jonathan Wakely  <jwakely@redhat.com>
5930
5931         * include/bits/fs_fwd.h: Fix doxygen group command.
5932         * include/bits/streambuf_iterator.h: Likewise.
5933         * include/bits/uses_allocator_args.h: Likewise.
5934         * include/std/memory: Likewise.
5935         * include/tr1/complex: Likewise.
5936
5937 2021-04-08  Jonathan Wakely  <jwakely@redhat.com>
5938
5939         * include/bits/basic_string.h: Tweak doxygen comment.
5940
5941 2021-04-08  Patrick Palka  <ppalka@redhat.com>
5942
5943         * include/std/ranges (__detail::find): Define.
5944         (split_view::_OuterIter::operator++): Apply proposed resolution
5945         of LWG 3505.
5946         * testsuite/std/ranges/adaptors/split.cc (test10): New test.
5947
5948 2021-04-08  Patrick Palka  <ppalka@redhat.com>
5949
5950         * include/std/ranges (__detail::find_if): Simplify.
5951         (__detail::find_if_not): Likewise.
5952         (__detail::min): Remove.
5953         (__detail::mismatch): Simplify.
5954         (take_view::size): Use std::min instead of __detail::min.
5955
5956 2021-04-08  Patrick Palka  <ppalka@redhat.com>
5957
5958         * include/std/ranges (__detail::__returnable_element): New
5959         concept.
5960         (elements_view): Use this concept in its constraints.  Add
5961         missing private access specifier.
5962         (elements_view::_S_get_element): Define as per LWG 3502.
5963         (elements_view::operator*, elements_view::operator[]): Use
5964         _S_get_element.
5965         (elements_view::operator++): Remove unnecessary constraint
5966         as per LWG 3492.
5967         * testsuite/std/ranges/adaptors/elements.cc (test05): New test.
5968
5969 2021-04-08  Jonathan Wakely  <jwakely@redhat.com>
5970
5971         * doc/Makefile.am (stamp-pdf-doxygen): Also grep for
5972         out-of-memory error in log file.
5973         * doc/Makefile.in: Regenerate.
5974
5975 2021-04-08  Jonathan Wakely  <jwakely@redhat.com>
5976
5977         * configure: Regenerate.
5978
5979 2021-04-08  Jonathan Wakely  <jwakely@redhat.com>
5980
5981         * include/bits/random.h: Fix doxygen group commands.
5982         * include/bits/regex_constants.h: Likewise.
5983         * include/tr1/random.h: Likewise.
5984
5985 2021-04-08  Jonathan Wakely  <jwakely@redhat.com>
5986
5987         * include/bits/hashtable.h (_Hashtable::_S_nothrow_move()):
5988         New function to determine noexcept-specifier for move
5989         constructors.
5990         (_Hashtable): Use _S_nothrow_move() on move constructors.
5991         * testsuite/23_containers/unordered_map/cons/noexcept_move_construct.cc:
5992         Correct static assertion message.
5993         * testsuite/23_containers/unordered_multimap/cons/noexcept_move_construct.cc:
5994         Likewise.
5995         * testsuite/23_containers/unordered_multiset/cons/noexcept_move_construct.cc:
5996         Likewise.
5997         * testsuite/23_containers/unordered_set/cons/noexcept_move_construct.cc:
5998         Likewise.
5999
6000 2021-04-08  Patrick Palka  <ppalka@redhat.com>
6001
6002         PR libstdc++/98384
6003         * testsuite/20_util/to_chars/long_double.cc: Don't run the test
6004         on targets without a large long double.  XFAIL the execution on
6005         targets with a non-conforming printf.
6006
6007 2021-04-08  Patrick Palka  <ppalka@redhat.com>
6008
6009         PR libstdc++/99433
6010         * include/std/ranges (__adaptor::__maybe_refwrap): Remove.
6011         (__adaptor::__adaptor_invocable): New concept.
6012         (__adaptor::__adaptor_partial_app_viable): New concept.
6013         (__adaptor::_RangeAdaptorClosure): Rewrite, turning it into a
6014         non-template base class.
6015         (__adaptor::_RangeAdaptor): Rewrite, turning it into a CRTP base
6016         class template.
6017         (__adaptor::_Partial): New class template that represents
6018         partial application of a range adaptor non-closure.
6019         (__adaptor::__pipe_invocable): New concept.
6020         (__adaptor::_Pipe): New class template.
6021         (__detail::__can_ref_view): New concept.
6022         (__detail::__can_subrange): New concept.
6023         (all): Replace the lambda here with ...
6024         (_All): ... this functor.  Add appropriate constraints.
6025         (__detail::__can_filter_view): New concept.
6026         (filter, _Filter): As in all/_All.
6027         (__detail::__can_transform): New concept.
6028         (transform, _Transform): As in all/_All.
6029         (__detail::__can_take_view): New concept.
6030         (take, _Take): As in all/_All.
6031         (__detail::__can_take_while_view): New concept.
6032         (take_while, _TakeWhile): As in all/_All.
6033         (__detail::__can_drop_view): New concept.
6034         (drop, _Drop): As in all/_All.
6035         (__detail::__can_drop_while_view): New concept.
6036         (drop_while, _DropWhile): As in all/_All.
6037         (__detail::__can_join_view): New concept.
6038         (join, _Join): As in all/_All.
6039         (__detail::__can_split_view): New concept.
6040         (split, _Split): As in all/_All.  Rename template parameter
6041         _Fp to _Pattern.
6042         (__detail::__already_common): New concept.
6043         (__detail::__can_common_view): New concept.
6044         (common, _Common): As in all/_All.
6045         (__detail::__can_reverse_view): New concept.
6046         (reverse, _Reverse): As in all/_All.
6047         (__detail::__can_elements_view): New concept.
6048         (elements, _Elements): As in all/_All.
6049         (keys, values): Adjust.
6050         * testsuite/std/ranges/adaptors/99433.cc: New test.
6051         * testsuite/std/ranges/adaptors/all.cc: No longer expect that
6052         adding empty range adaptor closure objects to a pipeline doesn't
6053         increase the size of the pipeline.
6054         (test05): New test.
6055         * testsuite/std/ranges/adaptors/common.cc (test03): New test.
6056         * testsuite/std/ranges/adaptors/drop.cc (test09): New test.
6057         * testsuite/std/ranges/adaptors/drop_while.cc (test04): New test.
6058         * testsuite/std/ranges/adaptors/elements.cc (test04): New test.
6059         * testsuite/std/ranges/adaptors/filter.cc (test06): New test.
6060         * testsuite/std/ranges/adaptors/join.cc (test09): New test.
6061         * testsuite/std/ranges/adaptors/p2281.cc: New test.
6062         * testsuite/std/ranges/adaptors/reverse.cc (test07): New test.
6063         * testsuite/std/ranges/adaptors/split.cc (test01, test04):
6064         Adjust.
6065         (test09): New test.
6066         * testsuite/std/ranges/adaptors/split_neg.cc (test01): Adjust
6067         expected error message.
6068         (test02): Likewise.  Extend test.
6069         * testsuite/std/ranges/adaptors/take.cc (test06): New test.
6070         * testsuite/std/ranges/adaptors/take_while.cc (test05): New test.
6071         * testsuite/std/ranges/adaptors/transform.cc (test07, test08):
6072         New test.
6073
6074 2021-04-08  Jonathan Wakely  <jwakely@redhat.com>
6075
6076         * include/std/string_view: Adjust Doxygen @file comment.
6077
6078 2021-04-08  Jonathan Wakely  <jwakely@redhat.com>
6079
6080         * include/std/type_traits (is_scoped_enum<T>): Constrain partial
6081         specialization to not match incomplete enum types. Use a
6082         requires-expression instead of instantiating is_convertible.
6083         (is_scoped_enum<const T>): Add as workaround for PR c++/99968.
6084         * testsuite/20_util/is_scoped_enum/value.cc: Check with
6085         incomplete types and opaque-enum-declarations.
6086
6087 2021-04-07  Jonathan Wakely  <jwakely@redhat.com>
6088
6089         PR libstdc++/99805
6090         * src/c++17/fs_path.cc (path::_M_split_cmpts): Do not call
6091         non-const member on _M_pathname, to avoid copy-on-write.
6092         * testsuite/27_io/filesystem/path/decompose/parent_path.cc:
6093         Check construction from strings that might be shared.
6094
6095 2021-04-06  Jonathan Wakely  <jwakely@redhat.com>
6096
6097         * include/bits/move.h (forward, move, move_if_noexcept)
6098         (addressof): Add _GLIBCXX_NODISCARD.
6099         * include/bits/ranges_cmp.h (identity::operator()): Add
6100         nodiscard attribute.
6101         * include/c_global/cstddef (to_integer): Likewise.
6102         * include/std/bit (bit_cast): Likewise.
6103         * include/std/utility (as_const, to_underlying): Likewise.
6104
6105 2021-04-06  Jonathan Wakely  <jwakely@redhat.com>
6106
6107         * include/bits/move.h (forward): Change static_assert message
6108         to be unambiguous about what must be true.
6109         * testsuite/20_util/forward/c_neg.cc: Adjust dg-error.
6110         * testsuite/20_util/forward/f_neg.cc: Likewise.
6111
6112 2021-04-06  Jonathan Wakely  <jwakely@redhat.com>
6113
6114         * include/bits/alloc_traits.h: Use markdown for code font.
6115         * include/bits/basic_string.h: Fix @param names.
6116         * include/bits/max_size_type.h: Remove period after @file.
6117         * include/bits/regex.h: Fix duplicate @retval names, and rename.
6118         * include/ext/pb_ds/detail/priority_queue_base_dispatch.hpp: Add
6119         group open to match existing group close.
6120         * include/ext/pb_ds/priority_queue.hpp: Add blank line before group
6121         open.
6122
6123 2021-04-06  Jonathan Wakely  <jwakely@redhat.com>
6124
6125         * include/bits/atomic_base.h: Fix doxygen group close.
6126         * include/bits/basic_ios.h: Likewise.
6127         * include/bits/forward_list.h: Likewise.
6128         * include/bits/fs_dir.h: Likewise.
6129         * include/bits/fs_ops.h: Likewise.
6130         * include/bits/fs_path.h: Likewise.
6131         * include/bits/functional_hash.h: Likewise.
6132         * include/bits/gslice.h: Likewise.
6133         * include/bits/gslice_array.h: Likewise.
6134         * include/bits/hashtable_policy.h: Likewise.
6135         * include/bits/indirect_array.h: Likewise.
6136         * include/bits/locale_classes.h: Likewise.
6137         * include/bits/locale_facets.h: Likewise.
6138         * include/bits/locale_facets_nonio.h: Likewise.
6139         * include/bits/mask_array.h: Likewise.
6140         * include/bits/refwrap.h: Likewise.
6141         * include/bits/regex.h: Likewise.
6142         * include/bits/regex_automaton.h: Likewise.
6143         * include/bits/regex_compiler.h: Likewise.
6144         * include/bits/regex_constants.h: Likewise.
6145         * include/bits/regex_error.h: Likewise.
6146         * include/bits/regex_executor.h: Likewise.
6147         * include/bits/regex_scanner.h: Likewise.
6148         * include/bits/shared_ptr.h: Likewise.
6149         * include/bits/shared_ptr_atomic.h: Likewise.
6150         * include/bits/shared_ptr_base.h: Likewise.
6151         * include/bits/slice_array.h: Likewise.
6152         * include/bits/specfun.h: Likewise.
6153         * include/bits/std_function.h: Likewise.
6154         * include/bits/std_mutex.h: Likewise.
6155         * include/bits/stl_deque.h: Likewise.
6156         * include/bits/stl_iterator.h: Likewise.
6157         * include/bits/stl_iterator_base_types.h: Likewise.
6158         * include/bits/stl_map.h: Likewise.
6159         * include/bits/stl_multimap.h: Likewise.
6160         * include/bits/stl_multiset.h: Likewise.
6161         * include/bits/stl_numeric.h: Likewise.
6162         * include/bits/stl_pair.h: Likewise.
6163         * include/bits/stl_set.h: Likewise.
6164         * include/bits/stl_uninitialized.h: Likewise.
6165         * include/bits/stream_iterator.h: Likewise.
6166         * include/bits/streambuf_iterator.h: Likewise.
6167         * include/bits/unique_ptr.h: Likewise.
6168         * include/bits/unordered_map.h: Likewise.
6169         * include/bits/unordered_set.h: Likewise.
6170         * include/decimal/decimal: Likewise.
6171         * include/experimental/any: Likewise.
6172         * include/experimental/array: Likewise.
6173         * include/experimental/bits/fs_dir.h: Likewise.
6174         * include/experimental/bits/fs_fwd.h: Likewise.
6175         * include/experimental/bits/fs_ops.h: Likewise.
6176         * include/experimental/bits/fs_path.h: Likewise.
6177         * include/experimental/buffer: Likewise.
6178         * include/experimental/internet: Likewise.
6179         * include/experimental/optional: Likewise.
6180         * include/experimental/propagate_const: Likewise.
6181         * include/experimental/socket: Likewise.
6182         * include/ext/pb_ds/assoc_container.hpp: Likewise.
6183         * include/ext/pb_ds/detail/priority_queue_base_dispatch.hpp:
6184         Likewise.
6185         * include/ext/pb_ds/detail/tree_policy/node_metadata_selector.hpp: Likewise.
6186         * include/ext/pb_ds/detail/trie_policy/node_metadata_selector.hpp: Likewise.
6187         * include/ext/pb_ds/detail/types_traits.hpp: Likewise.
6188         * include/ext/pb_ds/exception.hpp: Likewise.
6189         * include/ext/pb_ds/priority_queue.hpp: Likewise.
6190         * include/ext/pb_ds/tag_and_trait.hpp: Likewise.
6191         * include/ext/random: Likewise.
6192         * include/std/any: Likewise.
6193         * include/std/atomic: Likewise.
6194         * include/std/bitset: Likewise.
6195         * include/std/chrono: Likewise.
6196         * include/std/complex: Likewise.
6197         * include/std/condition_variable: Likewise.
6198         * include/std/fstream: Likewise.
6199         * include/std/future: Likewise.
6200         * include/std/iostream: Likewise.
6201         * include/std/istream: Likewise.
6202         * include/std/mutex: Likewise.
6203         * include/std/numeric: Likewise.
6204         * include/std/ostream: Likewise.
6205         * include/std/ratio: Likewise.
6206         * include/std/shared_mutex: Likewise.
6207         * include/std/stdexcept: Likewise.
6208         * include/std/streambuf: Likewise.
6209         * include/std/system_error: Likewise.
6210         * include/std/thread: Likewise.
6211         * include/std/valarray: Likewise.
6212         * include/std/variant: Likewise.
6213         * include/tr1/cmath: Likewise.
6214         * include/tr1/regex: Likewise.
6215         * include/tr2/dynamic_bitset: Likewise.
6216         * libsupc++/atomic_lockfree_defines.h: Likewise.
6217         * libsupc++/exception: Likewise.
6218         * libsupc++/exception.h: Likewise.
6219         * libsupc++/exception_ptr.h: Likewise.
6220         * libsupc++/nested_exception.h: Likewise.
6221
6222 2021-03-31  Alexandre Oliva  <oliva@adacore.com>
6223
6224         * testsuite/30_threads/future/members/poll.cc: Use faster
6225         after-ready call in the calibration loop.
6226
6227 2021-03-29  Jonathan Wakely  <jwakely@redhat.com>
6228
6229         * doc/xml/manual/status_cxx2017.xml: Adjust link for PSTL.
6230         * doc/html/manual/status.html: Regenerate.
6231
6232 2021-03-28  François Dumont  <fdumont@gcc.gnu.org>
6233
6234         * include/debug/forward_list
6235         (forward_list(forward_list&&, const allocator_type&)): Add noexcept qualification.
6236         * include/debug/list (list(list&&, const allocator_type&)): Likewise and add
6237         call to safe container allocator aware move constructor.
6238         * include/debug/vector (vector(vector&&, const allocator_type&)):
6239         Fix noexcept qualification.
6240         * testsuite/23_containers/forward_list/cons/noexcept_move_construct.cc:
6241         Add allocator-extended move constructor noexceot qualification check.
6242         * testsuite/23_containers/list/cons/noexcept_move_construct.cc: Likewise.
6243
6244 2021-03-26  Jonathan Wakely  <jwakely@redhat.com>
6245
6246         * src/c++11/random.cc (USE_LCG): Define when a pseudo-random
6247         fallback is needed.
6248         [USE_LCG] (bad_seed, construct_lcg_at, destroy_lcg_at, __lcg):
6249         New helper functions and callback.
6250         (random_device::_M_init): Add 'prng' and 'all' enumerators.
6251         Replace switch with fallthrough with a series of 'if' statements.
6252         [USE_LCG]: Construct an lcg_type engine and use __lcg when cpuid
6253         checks fail.
6254         (random_device::_M_init_pretr1) [USE_MT19937]: Accept "prng"
6255         token.
6256         (random_device::_M_getval): Check for callback unconditionally
6257         and always pass _M_file pointer.
6258         * testsuite/26_numerics/random/random_device/85494.cc: Remove
6259         effective-target check. Use new random_device_available helper.
6260         * testsuite/26_numerics/random/random_device/94087.cc: Likewise.
6261         * testsuite/26_numerics/random/random_device/cons/default-cow.cc:
6262         Remove effective-target check.
6263         * testsuite/26_numerics/random/random_device/cons/default.cc:
6264         Likewise.
6265         * testsuite/26_numerics/random/random_device/cons/token.cc: Use
6266         new random_device_available helper. Test "prng" token.
6267         * testsuite/util/testsuite_random.h (random_device_available):
6268         New helper function.
6269
6270 2021-03-25  François Dumont  <fdumont@gcc.gnu.org>
6271
6272         * include/debug/string
6273         (basic_string(const basic_string&, const _Alloc&)): Define even if !_GLIBCXX_USE_CXX11_ABI.
6274         (basic_string(basic_string&&, const _Alloc&)): Likewise and add noexcept qualification.
6275         (basic_string<>::erase): Adapt to take __const_iterator.
6276         (basic_string(const _CharT*, const _Allocator&)): Remove assign call.
6277         (basic_string<>::insert(const_iterator, _InputIte, _InputIte)): Try to
6278         remove iterator debug layer even if !_GLIBCXX_USE_CXX11_ABI.
6279         [_GLIBCXX_USE_CHAR8_T] (__gnu_debug::u8string): New.
6280         (__gnu_debug::u16string, __gnu_debug::u32string): New.
6281         (std::hash<__gnu_debug::basic_string<>>): New partial specialization.
6282         (std::__is_fast_hash<__gnu_debug::basic_string<>>): Likewise.
6283         * testsuite/util/exception/safety.h
6284         (erase_base<__gnu_debug::basic_string<>>): New partial specialization.
6285         (insert_base<__gnu_debug::basic_string<>>): Likewise.
6286         * testsuite/util/testsuite_container_traits.h (traits<__gnu_debug::basic_string<>>):
6287         New partial specialization.
6288         * testsuite/21_strings/basic_string/hash/debug.cc: New test.
6289         * testsuite/21_strings/basic_string/requirements/citerators.cc:
6290         Add test on __gnu_debug::string.
6291         * testsuite/21_strings/basic_string/requirements/dr438/constructor.cc: Likewise.
6292         * testsuite/21_strings/basic_string/requirements/exception/basic.cc: Likewise.
6293         * testsuite/21_strings/basic_string/requirements/exception/generation_prohibited.cc:
6294         Likewise.
6295         * testsuite/21_strings/basic_string/requirements/exception/propagation_consistent.cc:
6296         Likewise.
6297         * testsuite/21_strings/basic_string/requirements/explicit_instantiation/char/1.cc:
6298         Likewise.
6299         * testsuite/21_strings/basic_string/requirements/explicit_instantiation/char16_t/1.cc:
6300         Likewise.
6301         * testsuite/21_strings/basic_string/requirements/explicit_instantiation/char32_t/1.cc:
6302         Likewise.
6303         * testsuite/21_strings/basic_string/requirements/explicit_instantiation/char8_t/1.cc:
6304         Likewise.
6305         * testsuite/21_strings/basic_string/requirements/explicit_instantiation/wchar_t/1.cc:
6306         Likewise.
6307         * testsuite/21_strings/basic_string/requirements/typedefs.cc: Likewise.
6308
6309 2021-03-25  Jakub Jelinek  <jakub@redhat.com>
6310
6311         PR c++/99672
6312         * testsuite/18_support/source_location/consteval.cc (main): Adjust
6313         expected column numbers.
6314         * testsuite/18_support/source_location/1.cc (main): Likewise.
6315
6316 2021-03-25  Jonathan Wakely  <jwakely@redhat.com>
6317
6318         * libsupc++/new_opa.cc [!_GLIBCXX_HOSTED]: Declare malloc.
6319
6320 2021-03-25  Jonathan Wakely  <jwakely@redhat.com>
6321
6322         * testsuite/util/exception/safety.h (setup_base::generate):
6323         Support seeding random engine.
6324         (erase_point, erase_range): Adjust range of random numbers to
6325         ensure dereferenceable iterators are used where required.
6326         (generation_prohibited::run): Do not try to erase from empty
6327         containers.
6328         * testsuite/util/testsuite_containergen.h (test_containers):
6329         Support seeding random engine.
6330
6331 2021-03-23  Jonathan Wakely  <jwakely@redhat.com>
6332
6333         * testsuite/std/ranges/adaptors/reverse.cc: Replace duplicated
6334         line with a check that uses the const being/end overloads.
6335
6336 2021-03-23  Moritz Sichert  <sichert@in.tum.de>
6337
6338         * include/std/ranges (reverse_view::begin, reverse_view::end):
6339         Qualify make_reverse_iterator calls to avoid ADL.
6340         * testsuite/std/ranges/adaptors/reverse.cc: Test that
6341         views::reverse works when make_reverse_iterator is defined
6342         in an associated namespace.
6343
6344 2021-03-23  Jonathan Wakely  <jwakely@redhat.com>
6345
6346         * include/bits/c++config (_GLIBCXX_LONG_DOUBLE_ALT128_COMPAT):
6347         Do not define when compiling with Clang.
6348
6349 2021-03-22  Jonathan Wakely  <jwakely@redhat.com>
6350
6351         * include/std/string_view (basic_string_view(Range&&)): Define new
6352         constructor and deduction guide.
6353         * testsuite/21_strings/basic_string_view/cons/char/range_c++20.cc: New test.
6354         * testsuite/21_strings/basic_string_view/cons/wchar_t/range_c++20.cc: New test.
6355
6356 2021-03-22  Jonathan Wakely  <jwakely@redhat.com>
6357
6358         * include/bits/range_access.h (begin(T (&)[N]), end(T (&)[N])):
6359         Add missing 'noexcept' as per LWG 2280.
6360         (rbegin(T (&)[N]), rend(T (&)[N]), rbegin(initializer_list<T>))
6361         (rend(initializer_list<T>)): Add 'noexcept' as per LWG 3537.
6362         * testsuite/24_iterators/range_access/range_access.cc: Check for
6363         expected noexcept specifiers. Check result types of generic
6364         std::begin and std::end overloads.
6365         * testsuite/24_iterators/range_access/range_access_cpp14.cc:
6366         Check for expected noexcept specifiers.
6367         * testsuite/24_iterators/range_access/range_access_cpp17.cc:
6368         Likewise.
6369
6370 2021-03-19  Jonathan Wakely  <jwakely@redhat.com>
6371
6372         * include/std/type_traits (is_scoped_enum): Define.
6373         * include/std/version (__cpp_lib_is_scoped_enum): Define.
6374         * testsuite/20_util/is_scoped_enum/value.cc: New test.
6375         * testsuite/20_util/is_scoped_enum/version.cc: New test.
6376
6377 2021-03-16  Jonathan Wakely  <jwakely@redhat.com>
6378
6379         PR libstdc++/99341
6380         * config/abi/post/aarch64-linux-gnu/baseline_symbols.txt: Remove
6381         std::once_flag symbols.
6382         * config/abi/post/ia64-linux-gnu/baseline_symbols.txt: Likewise.
6383         * config/abi/post/m68k-linux-gnu/baseline_symbols.txt: Likewise.
6384         * config/abi/post/riscv64-linux-gnu/baseline_symbols.txt:
6385         Likewise.
6386         * config/abi/pre/gnu.ver: Likewise.
6387         * src/c++11/mutex.cc [_GLIBCXX_HAVE_LINUX_FUTEX]
6388         (struct __once_flag_compat): Remove.
6389         (_ZNSt9once_flag11_M_activateEv): Remove.
6390         (_ZNSt9once_flag9_M_finishEb): Remove.
6391
6392 2021-03-16  Jonathan Wakely  <jwakely@redhat.com>
6393
6394         PR libstdc++/99341
6395         * include/std/mutex [_GLIBCXX_HAVE_LINUX_FUTEX] (once_flag):
6396         Revert to pthread_once_t implementation.
6397         [_GLIBCXX_HAVE_LINUX_FUTEX] (call_once): Likewise.
6398         * src/c++11/mutex.cc [_GLIBCXX_HAVE_LINUX_FUTEX]
6399         (struct __once_flag_compat): New type matching the reverted
6400         implementation of once_flag using futexes.
6401         (once_flag::_M_activate): Remove, replace with ...
6402         (_ZNSt9once_flag11_M_activateEv): ... alias symbol.
6403         (once_flag::_M_finish): Remove, replace with ...
6404         (_ZNSt9once_flag9_M_finishEb): ... alias symbol.
6405         * testsuite/30_threads/call_once/66146.cc: Removed.
6406
6407 2021-03-15  Iain Sandoe  <iain@sandoe.co.uk>
6408
6409         * testsuite/17_intro/names.cc: Exclude j from the list
6410         of test symbols for Darwin.
6411
6412 2021-03-15  Iain Sandoe  <iain@sandoe.co.uk>
6413
6414         * config/os/bsd/darwin/ppc-extra.ver: Add matching for
6415         to_chars and from_chars for long double.
6416
6417 2021-03-15  Patrick Palka  <ppalka@redhat.com>
6418
6419         * include/bits/max_size_type.h (__max_size_type::operator _Tp):
6420         Fix formatting.
6421         (__max_size_type::operator++): Define.
6422         (__max_size_type::operator--): Likewise.
6423         (__max_size_type::operator<=>): Conditionally define (in place
6424         of the other comparison operators).
6425         (__max_diff_type::operator _Tp): Fix formatting.
6426         (__max_diff_type::operator++): Define.
6427         (__max_diff_type::operator--): Likewise.
6428         (__max_diff_type::operator<=>): Conditionally define (in place
6429         of the other comparison operators).
6430         * testsuite/std/ranges/iota/max_size_type.cc (test01): Test
6431         these operator overloads.
6432
6433 2021-03-15  Caroline Tice  <cmtice@google.com>
6434
6435         PR libstdc++/99172
6436         * src/Makefile.am (AM_CXXFLAGS_PRE, AM_CXXFLAGS): Add
6437         AM_CXXFLAGS_PRE with the old definition of AM_CXXFLAGS; make
6438         AM_CXXFLAGS to be AM_CXXFLAGS_PRE with '-fvtable-verify=std'
6439         filtered out.
6440         * src/Makefile.in: Regenerate.
6441
6442 2021-03-11  Patrick Palka  <ppalka@redhat.com>
6443
6444         * src/c++17/floating_to_chars.cc: Simplify the file as if
6445         __SIZEOF_INT128__ is always defined.
6446         [!defined __SIZEOF_INT128__]: Include "uint128_t.h".  Define
6447         a base-10 to_chars overload for the uint128_t class type.
6448         * src/c++17/uint128_t.h: New file.
6449         * testsuite/20_util/to_chars/long_double.cc: No longer expect an
6450         execution FAIL on targets that have a large long double type
6451         but lack __int128.
6452
6453 2021-03-11  Patrick Palka  <ppalka@redhat.com>
6454
6455         * src/c++17/ryu/LOCAL_PATCHES: Update.
6456         * src/c++17/ryu/d2s_intrinsics.h: Don't define uint128_t.
6457         * src/c++17/ryu/generic_128.h: Likewise.
6458         * src/c++17/ryu/ryu_generic_128.h (struct floating_decimal_128):
6459         Use uint128_t instead of __uint128_t.
6460         (generic_binary_to_decimal): Likewise.
6461
6462 2021-03-11  Patrick Palka  <ppalka@redhat.com>
6463
6464         * src/c++17/ryu/LOCAL_PATCHES: New file.
6465
6466 2021-03-11  Patrick Palka  <ppalka@redhat.com>
6467
6468         * src/c++17/floating_to_chars.cc (uint128_t): New conditionally
6469         defined alias of unsigned __int128.
6470         (floating_type_traits_binary128::mantissa_t): Use uint128_t
6471         instead of unsigned __int128.
6472         (floating_type_traits<long double>::mantissa_t)
6473         [LONG_DOUBLE_KIND == LDK_IBM128]: Likewise.
6474         (get_ieee_repr): Likewise.  Make casts from uint_t to mantissa_t
6475         and uint32_t explicit.  Simplify the extraction of mantissa,
6476         exponent and sign bit.
6477
6478 2021-03-11  Jonathan Wakely  <jwakely@redhat.com>
6479
6480         * include/std/barrier (barrier::arrival_token): New move-only
6481         class that encapsulates the underlying token value.
6482
6483 2021-03-11  Jonathan Wakely  <jwakely@redhat.com>
6484
6485         * python/libstdcxx/v6/printers.py (find_type): Use tag attribute
6486         instead of unqualified() method.
6487
6488 2021-03-11  Jonathan Wakely  <jwakely@redhat.com>
6489
6490         PR libstdc++/99537
6491         * include/std/stop_token (_Stop_state_t::_M_release_ownership):
6492         Use acq_rel memory ordering.
6493
6494 2021-03-11  Jonathan Wakely  <jwakely@redhat.com>
6495
6496         PR libstdc++/99533
6497         * src/c++17/fs_dir.cc (recursive_directory_iterator): Use new
6498         helper function to check for permission denied errors.
6499         * src/filesystem/dir.cc (recursive_directory_iterator):
6500         Likewise.
6501         * src/filesystem/dir-common.h (is_permission_denied_error): New
6502         helper function.
6503
6504 2021-03-11  Jonathan Wakely  <jwakely@redhat.com>
6505
6506         PR libstdc++/99536
6507         * include/bits/random.h (normal_distribution): Use
6508         default-initializer for _M_saved and _M_saved_available.
6509
6510 2021-03-10  John David Anglin  <danglin@gcc.gnu.org>
6511
6512         * testsuite/29_atomics/atomic/wait_notify/bool.cc: Add options to
6513         link with libatomic.
6514         * testsuite/29_atomics/atomic/wait_notify/generic.cc: Likewise.
6515         * testsuite/29_atomics/atomic/wait_notify/pointers.cc: Likewise.
6516         * testsuite/29_atomics/atomic_flag/wait_notify/1.cc: Likewise.
6517         * testsuite/30_threads/barrier/arrive.cc: Likewise.
6518         * testsuite/30_threads/barrier/arrive_and_drop.cc: Likewise.
6519         * testsuite/30_threads/barrier/arrive_and_wait.cc: Likewise.
6520         * testsuite/30_threads/barrier/completion.cc: Likewise.
6521         * testsuite/30_threads/latch/3.cc: Likewise.
6522         * testsuite/30_threads/semaphore/try_acquire.cc: Likewise.
6523         * testsuite/30_threads/semaphore/try_acquire_for.cc: Likewise.
6524         * testsuite/30_threads/semaphore/try_acquire_until.cc: Likewise.
6525
6526 2021-03-10  Jonathan Wakely  <jwakely@redhat.com>
6527
6528         PR libstdc++/99413
6529         * include/bits/align.h: Include debug/assertions.h.
6530         * include/bits/codecvt.h: Include bits/c++config.h.
6531         * include/bits/enable_special_members.h: Likewise.
6532         * include/bits/erase_if.h: Likewise.
6533         * include/bits/functional_hash.h: Include <type_traits>.
6534         * include/bits/invoke.h: Include bits/move.h.
6535         * include/bits/ostream_insert.h: Include bits/exception_defines.h.
6536         * include/bits/parse_numbers.h: Include <type_traits>.
6537         * include/bits/predefined_ops.h: Include bits/c++config.h.
6538         * include/bits/range_access.h: Include bits/stl_iterator.h.
6539         * include/bits/stl_bvector.h: Do not include bits/stl_vector.h.
6540         * include/bits/stl_iterator.h: Include bits/stl_iterator_base_types.h.
6541         * include/bits/stl_uninitialized.h: Include bits/stl_algobase.h.
6542         * include/bits/uniform_int_dist.h: Include bits/concept_check.h.
6543         * include/bits/unique_lock.h: Include bits/std_mutex.h.
6544         * include/debug/assertions.h: Include bits/c++config.h.
6545
6546 2021-03-10  Jonathan Wakely  <jwakely@redhat.com>
6547
6548         * include/bits/ranges_cmp.h (__eq_builtin_ptr_cmp): Remove.
6549         (ranges::equal_to, ranges::not_equal_to): Do not constrain
6550         with __eq_builtin_ptr_cmp.
6551         (ranges::less, ranges::greater, ranges::less_equal)
6552         (ranges::greater_equal): Do not constrain with
6553         __less_builtin_ptr_cmp.
6554         * libsupc++/compare (compare_three_way): Do not constrain with
6555         __3way_builtin_ptr_cmp.
6556         * testsuite/18_support/comparisons/object/builtin-ptr-three-way.cc: Moved to...
6557         * testsuite/18_support/comparisons/object/lwg3530.cc: ...here.
6558         * testsuite/20_util/function_objects/range.cmp/lwg3530.cc: New test.
6559
6560 2021-03-10  Jonathan Wakely  <jwakely@redhat.com>
6561
6562         * testsuite/std/time/syn_c++20.cc: Enable synopsis checks for
6563         C++20 calendar types.
6564
6565 2021-03-06  Jakub Jelinek  <jakub@redhat.com>
6566
6567         PR libstdc++/99396
6568         * include/std/bit (__rotl, __rotr): Add optimized variants for power of
6569         two _Nd which the compiler can pattern match the rotates.
6570
6571 2021-03-04  Jonathan Wakely  <jwakely@redhat.com>
6572
6573         PR libstdc++/99382
6574         * testsuite/20_util/specialized_algorithms/uninitialized_default_n/sizes.cc:
6575         Make storage larger than required. Verify no write to the last
6576         element.
6577         * testsuite/20_util/specialized_algorithms/uninitialized_value_construct_n/sizes.cc:
6578         Likewise.
6579
6580 2021-03-03  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
6581
6582         * config/abi/post/i386-solaris/baseline_symbols.txt: Regenerate.
6583         * config/abi/post/i386-solaris/amd64/baseline_symbols.txt:
6584         Likewise.
6585         * config/abi/post/sparc-solaris/baseline_symbols.txt: Likewise.
6586         * config/abi/post/sparc-solaris/sparcv9/baseline_symbols.txt:
6587         Likewise.
6588
6589 2021-03-03  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
6590
6591         * include/experimental/bits/simd.h: Replace reserved _X, _B by
6592         _Xp, _Bp.
6593         * include/experimental/bits/simd_builtin.h: Likewise.
6594         * include/experimental/bits/simd_x86.h: Likewise.
6595
6596 2021-02-27  Jonathan Wakely  <jwakely@redhat.com>
6597
6598         PR libstdc++/99301
6599         * include/std/chrono (year_month_day::_M_days_since_epoch()):
6600         Convert chrono::month and chrono::day to unsigned before
6601         converting to uint32_t.
6602
6603 2021-02-25  Jonathan Wakely  <jwakely@redhat.com>
6604
6605         * include/std/chrono (year_month_day::_S_from_days): Perform
6606         all calculations with type uint32_t.
6607
6608 2021-02-25  Jonathan Wakely  <jwakely@redhat.com>
6609
6610         * doc/xml/manual/abi.xml: Document versioning for GCC 11.
6611         * doc/html/manual/abi.html: Regenerate.
6612
6613 2021-02-25  Jonathan Wakely  <jwakely@redhat.com>
6614
6615         PR libstdc++/99270
6616         * testsuite/27_io/headers/cstdio/types_std.cc: Use pointer to
6617         FILE instead of FILE.
6618
6619 2021-02-25  Andreas Schwab  <schwab@suse.de>
6620
6621         * config/abi/post/aarch64-linux-gnu/baseline_symbols.txt: Update.
6622         * config/abi/post/ia64-linux-gnu/baseline_symbols.txt: Update.
6623         * config/abi/post/m68k-linux-gnu/baseline_symbols.txt: Update.
6624         * config/abi/post/riscv64-linux-gnu/baseline_symbols.txt: Update.
6625
6626 2021-02-25  Jonathan Wakely  <jwakely@redhat.com>
6627
6628         PR libstdc++/99265
6629         * include/std/chrono (year_month_day::_S_from_days): Cast long
6630         to int explicitly.
6631
6632 2021-02-25  Jonathan Wakely  <jwakely@redhat.com>
6633
6634         * include/std/utility (to_underlying): Define.
6635         * include/std/version (__cpp_lib_to_underlying): Define.
6636         * testsuite/20_util/to_underlying/1.cc: New test.
6637         * testsuite/20_util/to_underlying/version.cc: New test.
6638
6639 2021-02-24  Jonathan Wakely  <jwakely@redhat.com>
6640
6641         PR libstdc++/99261
6642         * src/c++17/floating_to_chars.cc (sprintf_ld): Add extra args
6643         before value to be printed.
6644
6645 2021-02-24  Patrick Palka  <ppalka@redhat.com>
6646
6647         * src/c++17/floating_to_chars.cc (__floating_to_chars_precision):
6648         Relax the condition that guards the printf code path to accept
6649         F128_type as well as long double.
6650
6651 2021-02-24  Cassio Neri  <cassio.neri@gmail.com>
6652
6653         * include/std/chrono (year_month_day_last:day): New
6654         implementation.
6655
6656 2021-02-24  Cassio Neri  <cassio.neri@gmail.com>
6657
6658         * include/std/chrono (year::is_leap): New implementation.
6659         * testsuite/std/time/year/2.cc: New test.
6660
6661 2021-02-24  Cassio Neri  <cassio.neri@gmail.com>
6662
6663         * include/std/chrono (year_month_day::_M_days_since_epoch):
6664         New implementation.
6665         * testsuite/std/time/year_month_day/4.cc: New test.
6666
6667 2021-02-24  Cassio Neri  <cassio.neri@gmail.com>
6668
6669         * include/std/chrono (year_month_day::_S_from_days): New
6670         implementation.
6671         * testsuite/std/time/year_month_day/3.cc: New test.
6672
6673 2021-02-24  Patrick Palka  <ppalka@redhat.com>
6674
6675         PR libstdc++/98384
6676         * testsuite/20_util/to_chars/long_double.cc: Include <optional>.
6677         (test01): Simplify verifying the nearby values by using a
6678         2-iteration loop and a dedicated output buffer to check that the
6679         nearby values are different.  Factor out the printf-based
6680         verification into a local function, and check that the leading
6681         hex digits agree before comparing to the output of printf.  Also
6682         verify the output by round-tripping it through from_chars.
6683
6684 2021-02-24  Jonathan Wakely  <jwakely@redhat.com>
6685
6686         PR libstdc++/98389
6687         * config/abi/pre/gnu.ver (GLIBCXX_3.4.29): Do not match to_chars
6688         symbols for long double arguments mangled as 'g'.
6689         * config/os/gnu-linux/ldbl-extra.ver: Likewise.
6690         * config/os/gnu-linux/ldbl-ieee128-extra.ver: Likewise.
6691         * src/c++17/Makefile.am [GLIBCXX_LDBL_ALT128_COMPAT_TRUE]:
6692         Use -mabi=ibmlongdouble for floating_to_chars.cc.
6693         * src/c++17/Makefile.in: Regenerate.
6694         * src/c++17/floating_to_chars.cc (floating_type_traits_binary128):
6695         New type defining type traits of IEEE binary128 format.
6696         (floating_type_traits<__float128>): Define specialization.
6697         (floating_type_traits<long double>): Define in terms of
6698         floating_type_traits_binary128 when appropriate.
6699         (floating_to_shortest_scientific): Handle __float128.
6700         (sprintf_ld): New function template for printing a long double
6701         or __ieee128 value using sprintf.
6702         (__floating_to_chars_shortest, __floating_to_chars_precision):
6703         Use sprintf_ld.
6704         (to_chars): Define overloads for __float128.
6705
6706 2021-02-24  Jonathan Wakely  <jwakely@redhat.com>
6707
6708         * testsuite/17_intro/names.cc: Undefine 'u' on powerpc*-linux*.
6709
6710 2021-02-23  Martin Sebor  <msebor@redhat.com>
6711
6712         PR c++/99074
6713         * libsupc++/dyncast.cc (__dynamic_cast): Return null when
6714         first argument is null.
6715
6716 2021-02-23  Jakub Jelinek  <jakub@redhat.com>
6717
6718         PR libstdc++/99181
6719         * testsuite/21_strings/char_traits/requirements/char/99181.cc: New
6720         test.
6721
6722 2021-02-23  Jakub Jelinek  <jakub@redhat.com>
6723
6724         PR libstdc++/99181
6725         * include/bits/char_traits.h (char_traits<char>::compare): For
6726         constexpr evaluation don't call
6727         __gnu_cxx::char_traits<char_type>::compare but do the comparison loop
6728         directly.
6729
6730 2021-02-23  Jakub Jelinek  <jakub@redhat.com>
6731
6732         PR libstdc++/97549
6733         * include/pstl/parallel_backend_serial.h: Remove __pstl::__par_backend.
6734
6735 2021-02-23  Patrick Palka  <ppalka@redhat.com>
6736
6737         PR libstdc++/98384
6738         * src/c++17/floating_to_chars.cc (get_ieee_repr): Extract
6739         the high- and low-order parts from an IBM long double value
6740         in an endian-agnostic way.
6741
6742 2021-02-19  Jonathan Wakely  <jwakely@redhat.com>
6743
6744         * include/bits/atomic_wait.h (__thread_relax()): Call
6745         __thread_yield() not __gthread_yield().
6746
6747 2021-02-15  Jonathan Wakely  <jwakely@redhat.com>
6748
6749         * include/bits/atomic_wait.h (__thread_yield()): Check
6750         _GLIBCXX_HAS_GTHREADS before using __gthread_yield.
6751         (__thread_relax()): Use __thread_yield() instead of repeating
6752         the preprocessor checks for __gthread_yield.
6753
6754 2021-02-15  Jonathan Wakely  <jwakely@redhat.com>
6755
6756         * include/std/mutex (once_flag::_M_activate()): Add explicit
6757         return statement for passive case.
6758         (once_flag::_M_finish(bool)): Use reserved name for parameter.
6759
6760 2021-02-14  Jonathan Wakely  <jwakely@redhat.com>
6761
6762         PR libstdc++/99096
6763         * testsuite/util/testsuite_fs.h: Always include <unistd.h>.
6764
6765 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
6766
6767         PR libstdc++/88881
6768         * src/c++17/fs_ops.cc (fs::symlink_status): Re-enable workaround.
6769
6770 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
6771
6772         * doc/xml/manual/status_cxx2014.xml: Document implementation
6773         specific properties of std::experimental::filesystem::rename.
6774         * doc/xml/manual/status_cxx2017.xml: Document implementation
6775         specific properties of std::filesystem::rename.
6776         * doc/html/*: Regenerate.
6777         * src/c++17/fs_ops.cc (fs::rename): Implement correct behaviour
6778         for directories on Windows.
6779         * src/filesystem/ops-common.h (__gnu_posix::rename): Use
6780         MoveFileExW on Windows.
6781         * testsuite/27_io/filesystem/operations/rename.cc: New test.
6782         * testsuite/experimental/filesystem/operations/rename.cc: New test.
6783
6784 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
6785
6786         * testsuite/util/testsuite_fs.h (nonexistent_path): Add
6787         random number to the path.
6788
6789 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
6790
6791         * include/experimental/internet (address_v6::to_string): Include
6792         scope ID in string.
6793         * testsuite/experimental/net/internet/address/v6/members.cc:
6794         Test to_string() results.
6795
6796 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
6797
6798         * include/experimental/internet (address_v6::any): Avoid using
6799         memcpy in constexpr function.
6800         (address_v6::loopback): Likewise.
6801         (make_address_v6): Fix missing return statements on error paths.
6802         * include/experimental/io_context: Avoid -Wdangling-else
6803         warning.
6804         * testsuite/experimental/net/internet/address/v4/members.cc:
6805         Remove unused variables.
6806         * testsuite/experimental/net/internet/address/v6/members.cc:
6807         New test.
6808
6809 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
6810
6811         * include/bits/shared_ptr_base.h (__shared_ptr::_M_get_deleter):
6812         Add unused attribute to parameter.
6813         * src/c++11/shared_ptr.cc (_Sp_make_shared_tag::_S_eq):
6814         Likewise.
6815
6816 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
6817
6818         * testsuite/27_io/basic_ostream/emit/1.cc: Expect test to fail
6819         if -fno-rtti is used.
6820         * testsuite/30_threads/async/forced_unwind.cc: Expect test
6821         to abort if -fno-rtti is used.
6822
6823 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
6824
6825         * testsuite/util/testsuite_allocator.h (memory_resource):
6826         Remove requirement for RTTI and exceptions to be enabled.
6827
6828 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
6829
6830         * testsuite/27_io/basic_istringstream/rdbuf/char/2832.cc: Use
6831         static_cast when RTTI is disabled.
6832         * testsuite/27_io/basic_istringstream/rdbuf/wchar_t/2832.cc:
6833         Likewise.
6834         * testsuite/27_io/basic_ostringstream/rdbuf/char/2832.cc:
6835         Likewise.
6836         * testsuite/27_io/basic_ostringstream/rdbuf/wchar_t/2832.cc:
6837         Likewise.
6838         * testsuite/27_io/basic_stringstream/str/char/2.cc:
6839         Likewise.
6840         * testsuite/27_io/basic_stringstream/str/wchar_t/2.cc:
6841         Likewise.
6842
6843 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
6844
6845         * include/std/ostream (__syncbuf_base::_S_get): Mark parameter
6846         as unused and only use dynamic_cast when RTTI is enabled.
6847
6848 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
6849
6850         PR libstdc++/99077
6851         * src/c++11/cxx11-ios_failure.cc (__ios_failure(const char*, int)):
6852         Change int parameter to error_code, to match std::ios_failure.
6853         (__throw_ios_failure(const char*, int)): Construct error_code
6854         from int parameter.
6855
6856 2021-02-11  Jonathan Wakely  <jwakely@redhat.com>
6857
6858         * libsupc++/eh_ptr.cc (_GLIBCXX_EH_PTR_RELOPS_COMPAT): Define
6859         new macro.
6860         * libsupc++/exception_ptr.h (_GLIBCXX_EH_PTR_USED): Check new
6861         macro instead of _GLIBCXX_EH_PTR_COMPAT.
6862         (operator==): Likewise.
6863
6864 2021-02-11  Jonathan Wakely  <jwakely@redhat.com>
6865
6866         PR libstdc++/99058
6867         * doc/xml/manual/status_cxx2011.xml: Document when support
6868         became stable.
6869         * doc/xml/manual/status_cxx2014.xml: Likewise.
6870         * doc/xml/manual/status_cxx2017.xml: Likewise.
6871         * doc/html/manual/status.html: Regenerate.
6872
6873 2021-02-10  Jonathan Wakely  <jwakely@redhat.com>
6874
6875         PR libstdc++/88881
6876         * src/c++17/fs_ops.cc (fs::status): Re-enable workaround.
6877
6878 2021-02-10  Jonathan Wakely  <jwakely@redhat.com>
6879
6880         * src/c++17/fs_ops.cc (fs::create_hard_link, fs::equivalent)
6881         (fs::remove): Use std::system_category() for error codes from
6882         GetLastError().
6883         * src/filesystem/ops.cc (fs::create_hard_link, fs::remove):
6884         Likewise.
6885
6886 2021-02-10  Jonathan Wakely  <jwakely@redhat.com>
6887
6888         * testsuite/27_io/filesystem/operations/proximate.cc: Fix typo
6889         in __MINGW32__ macro name.
6890         * testsuite/27_io/filesystem/path/compare/lwg2936.cc: Likewise.
6891         * testsuite/27_io/filesystem/path/generation/proximate.cc:
6892         Likewise.
6893         * testsuite/27_io/filesystem/path/generation/relative.cc:
6894         Likewise.
6895         * testsuite/util/testsuite_fs.h: Likewise.
6896
6897 2021-02-09  François Dumont  <fdumont@gcc.gnu.org>
6898
6899         * include/bits/stl_tree.h
6900         (__has_is_transparent, __has_is_transparent_t): Move...
6901         * include/bits/stl_function.h: ...here.
6902         * include/bits/hashtable_policy.h (_Hash_code_base<>::_M_hash_code_tr): New..
6903         (_Hashtable_base<>::_M_equals_tr): New.
6904         * include/bits/hashtable.h (_Hashtable<>::_M_find_tr, _Hashtable<>::_M_count_tr,
6905         _Hashtable<>::_M_equal_range_tr): New member function templates to perform
6906         heterogeneous lookup.
6907         (_Hashtable<>::_M_find_before_node_tr): New.
6908         (_Hashtable<>::_M_find_node_tr): New.
6909         * include/bits/unordered_map.h (unordered_map::find<>, unordered_map::count<>,
6910         unordered_map::contains<>, unordered_map::equal_range<>): New member function
6911         templates to perform heterogeneous lookup.
6912         (unordered_multimap::find<>, unordered_multimap::count<>,
6913         unordered_multimap::contains<>, unordered_multimap::equal_range<>): Likewise.
6914         * include/bits/unordered_set.h  (unordered_set::find<>, unordered_set::count<>,
6915         unordered_set::contains<>, unordered_set::equal_range<>): Likewise.
6916         (unordered_multiset::find<>, unordered_multiset::count<>,
6917         unordered_multiset::contains<>, unordered_multiset::equal_range<>): Likewise.
6918         * include/debug/unordered_map
6919         (unordered_map::find<>, unordered_map::equal_range<>): Likewise.
6920         (unordered_multimap::find<>, unordered_multimap::equal_range<>): Likewise.
6921         * include/debug/unordered_set
6922         (unordered_set::find<>, unordered_set::equal_range<>): Likewise.
6923         (unordered_multiset::find<>, unordered_multiset::equal_range<>): Likewise.
6924         * testsuite/23_containers/unordered_map/operations/1.cc: New test.
6925         * testsuite/23_containers/unordered_multimap/operations/1.cc: New test.
6926         * testsuite/23_containers/unordered_multiset/operations/1.cc: New test.
6927         * testsuite/23_containers/unordered_set/operations/1.cc: New test.
6928
6929 2021-02-09  François Dumont  <fdumont@gcc.gnu.org>
6930
6931         * include/bits/stl_deque.h
6932         (std::operator-(deque::iterator, deque::iterator)): Replace if/then with
6933         a null pointer test.
6934
6935 2021-02-09  Jonathan Wakely  <jwakely@redhat.com>
6936
6937         * testsuite/27_io/filesystem/operations/remove_all.cc: Remove
6938         test directory after making it writable again.
6939         * testsuite/experimental/filesystem/operations/remove_all.cc:
6940         Likewise.
6941
6942 2021-02-09  Jonathan Wakely  <jwakely@redhat.com>
6943
6944         PR libstdc++/99021
6945         * include/std/coroutine (coroutine_handle<P>::from_address): Add
6946         noexcept.
6947
6948 2021-02-09  Vladimir Vishnevsky  <vv.os.swe@gmail.com>
6949
6950         * include/ext/stdio_sync_filebuf.h: Remove unused <unistd.h>.
6951         * src/c++17/fs_ops.cc (fs::permissions): Qualify mode_t.
6952
6953 2021-02-09  Jakub Jelinek  <jakub@redhat.com>
6954
6955         PR middle-end/98465
6956         * include/bits/basic_string.tcc (basic_string::_M_replace): When __s
6957         points to the characters moved by earlier _S_move, compute the source
6958         address using expression based on the __p pointer rather than __s
6959         pointer.
6960
6961 2021-02-03  Jonathan Wakely  <jwakely@redhat.com>
6962
6963         * testsuite/19_diagnostics/error_code/operators/not_equal.cc:
6964         Add comparison with same category and different values.
6965         * testsuite/19_diagnostics/error_code/operators/less.cc:
6966         Likewise. Fix comparison involving different categories.
6967         * testsuite/19_diagnostics/error_code/operators/three_way.cc:
6968         Likewise.
6969         * testsuite/19_diagnostics/error_condition/operators/less.cc:
6970         Add comment.
6971         * testsuite/19_diagnostics/error_condition/operators/three_way.cc:
6972         Likewise.
6973
6974 2021-02-03  yaozhongxiao  <yaozhongxiao@linux.alibaba.com>
6975
6976         * include/experimental/bits/simd_neon.h: Replace repeated vpadd
6977         calls with a single vaddv for aarch64.
6978
6979 2021-02-03  Matthias Kretz  <kretz@kde.org>
6980
6981         * testsuite/Makefile.am: Warn about the workaround. Add
6982         -fno-tree-vrp to CXXFLAGS passed to the check_simd script.
6983         Improve initial user feedback from make check-simd.
6984         * testsuite/Makefile.in: Regenerated.
6985
6986 2021-02-03  Matthias Kretz  <kretz@kde.org>
6987
6988         * include/experimental/bits/simd.h: Add __detail::_Minimum and
6989         __detail::_Maximum to use them as _BinaryOperation to _S_reduce.
6990         Add hmin and hmax overloads for simd and const_where_expression.
6991         * include/experimental/bits/simd_scalar.h
6992         (_SimdImplScalar::_S_reduce): Make unused _BinaryOperation
6993         parameter const-ref to allow calling _S_reduce with an rvalue.
6994         * testsuite/experimental/simd/tests/reductions.cc: Add tests for
6995         hmin and hmax. Since the compiler statically determined that all
6996         tests pass, repeat the test after a call to make_value_unknown.
6997
6998 2021-02-03  Matthias Kretz  <kretz@kde.org>
6999
7000         * testsuite/experimental/simd/tests/bits/verify.h (verify): Add
7001         instruction pointer data member. Ensure that the `if (m_failed)`
7002         branch is always inlined into the calling code. The body of the
7003         conditional can still be a function call. Move the get_ip call
7004         into the verify ctor to simplify the ctor calls.
7005         (COMPARE): Don't mention the use of all_of for reduction of a
7006         simd_mask. It only distracts from the real issue.
7007
7008 2021-02-03  Matthias Kretz  <kretz@kde.org>
7009
7010         * testsuite/experimental/simd/driver.sh: Abstract reading test
7011         options into read_src_option function. Read skip, only,
7012         expensive, and xfail via read_src_option. Add timeout and
7013         timeout-factor options and adjust timeout variable accordingly.
7014         * testsuite/experimental/simd/tests/loadstore.cc: Set
7015         timeout-factor 2.
7016
7017 2021-02-03  Matthias Kretz  <kretz@kde.org>
7018
7019         * testsuite/experimental/simd/driver.sh: When handling the pipe
7020         to log (and on verbose to stdout) count the lines. If it exceeds
7021         1000 log the issue and exit 125, which is then handled as a
7022         failure.
7023
7024 2021-02-03  Matthias Kretz  <kretz@kde.org>
7025
7026         * testsuite/experimental/simd/tests/hypot3_fma.cc: Add skip:
7027         markup for long double on powerpc64*.
7028
7029 2021-02-03  Matthias Kretz  <kretz@kde.org>
7030
7031         * include/experimental/bits/simd.h: Add __have_power10vec
7032         conditional on _ARCH_PWR10.
7033         * include/experimental/bits/simd_builtin.h: Forward declare
7034         _MaskImplPpc and use it as _MaskImpl when __ALTIVEC__ is
7035         defined.
7036         (_MaskImplBuiltin::_S_some_of): Call _S_popcount from the
7037         _SuperImpl for optimizations and correctness.
7038         * include/experimental/bits/simd_ppc.h: Add _MaskImplPpc.
7039         (_MaskImplPpc::_S_popcount): Implement via vec_cntm for POWER10.
7040         Otherwise, for >=int use -vec_sums divided by a sizeof factor.
7041         For <int use -vec_sums(vec_sum4s(...)) to sum all mask entries.
7042
7043 2021-02-03  Matthias Kretz  <kretz@kde.org>
7044
7045         * testsuite/experimental/simd/driver.sh: Remove executable on
7046         SIGINT. Process compiler and test executable output: In verbose
7047         mode print messages immediately, limited to 1000 lines and
7048         breaking long lines to below $COLUMNS (or 1024 if not set).
7049         Communicating the exit status of the compiler / test with the
7050         necessary pipe is done via a message through stdout/-in.
7051
7052 2021-02-03  Matthias Kretz  <kretz@kde.org>
7053
7054         * testsuite/Makefile.am: Ensure .simd.summary is empty before
7055         collecting a new summary.
7056         * testsuite/Makefile.in: Regenerate.
7057
7058 2021-02-03  Matthias Kretz  <kretz@kde.org>
7059
7060         * testsuite/experimental/simd/generate_makefile.sh: Use
7061         different variables internally than documented for user
7062         overrides. This makes internal append/prepend work as intended.
7063
7064 2021-02-03  Matthias Kretz  <kretz@kde.org>
7065
7066         * testsuite/experimental/simd/driver.sh (verify_test): Print
7067         test output on run xfail. Do not repeat lines from the log that
7068         were already printed on stdout.
7069         (test_selector): Make the compiler flags pattern usable as a
7070         substring selector.
7071         (toplevel): Trap on SIGINT and remove the log and sum files.
7072         Call timout with --foreground to quickly terminate on SIGINT.
7073         * testsuite/experimental/simd/generate_makefile.sh: Simplify run
7074         targets via target patterns. Default DRIVEROPTS to -v for run
7075         targets. Remove log and sum files after completion of the run
7076         target (so that it's always recompiled).
7077         Place help text into text file for reasonable 'make help'
7078         performance.
7079
7080 2021-02-03  Matthias Kretz  <kretz@kde.org>
7081
7082         * include/experimental/bits/simd.h: Remove unnecessary static
7083         assertion. Allow sizeof(8) integer __intrinsic_type to enable
7084         the necessary mask type.
7085
7086 2021-02-03  Matthias Kretz  <kretz@kde.org>
7087
7088         * include/experimental/bits/simd.h: Let __intrinsic_type<long
7089         double, N> be valid if sizeof(long double) == sizeof(double) and
7090         use a __vector double as member type.
7091
7092 2021-02-03  Matthias Kretz  <kretz@kde.org>
7093
7094         * include/experimental/bits/simd.h (__is_intrinsic_type): New
7095         internal type trait. Alias for __is_vector_type on x86.
7096         (_VectorTraitsImpl): Enable for __intrinsic_type in addition for
7097         __vector_type.
7098         (__intrin_bitcast): Allow casting to & from vector & intrinsic
7099         types.
7100         (__intrinsic_type): Explicitly specialize for NEON intrinsic
7101         vector types.
7102
7103 2021-02-03  Matthias Kretz  <kretz@kde.org>
7104
7105         * testsuite/experimental/simd/driver.sh: Implement skip, only,
7106         expensive, and xfail markers. They can select on type, ABI tag
7107         subset number, target-triplet, and compiler flags.
7108         * testsuite/experimental/simd/generate_makefile.sh: The summary
7109         now includes lines for unexpected passes and expected failures.
7110         If the skip or only markers are only conditional on the type, do
7111         not generate rules for those types.
7112         * testsuite/experimental/simd/tests/abs.cc: Mark test expensive
7113         for ABI tag subsets 1-9.
7114         * testsuite/experimental/simd/tests/algorithms.cc: Ditto.
7115         * testsuite/experimental/simd/tests/broadcast.cc: Ditto.
7116         * testsuite/experimental/simd/tests/casts.cc: Ditto.
7117         * testsuite/experimental/simd/tests/generator.cc: Ditto.
7118         * testsuite/experimental/simd/tests/integer_operators.cc: Ditto.
7119         * testsuite/experimental/simd/tests/loadstore.cc: Ditto.
7120         * testsuite/experimental/simd/tests/mask_broadcast.cc: Ditto.
7121         * testsuite/experimental/simd/tests/mask_conversions.cc: Ditto.
7122         * testsuite/experimental/simd/tests/mask_implicit_cvt.cc: Ditto.
7123         * testsuite/experimental/simd/tests/mask_loadstore.cc: Ditto.
7124         * testsuite/experimental/simd/tests/mask_operator_cvt.cc: Ditto.
7125         * testsuite/experimental/simd/tests/mask_operators.cc: Ditto.
7126         * testsuite/experimental/simd/tests/mask_reductions.cc: Ditto.
7127         * testsuite/experimental/simd/tests/operator_cvt.cc: Ditto.
7128         * testsuite/experimental/simd/tests/operators.cc: Ditto.
7129         * testsuite/experimental/simd/tests/reductions.cc: Ditto.
7130         * testsuite/experimental/simd/tests/simd.cc: Ditto.
7131         * testsuite/experimental/simd/tests/split_concat.cc: Ditto.
7132         * testsuite/experimental/simd/tests/splits.cc: Ditto.
7133         * testsuite/experimental/simd/tests/where.cc: Ditto.
7134         * testsuite/experimental/simd/tests/fpclassify.cc: Ditto. In
7135         addition replace "test only floattypes" marker by unconditional
7136         "float|double|ldouble" only marker.
7137         * testsuite/experimental/simd/tests/frexp.cc: Ditto.
7138         * testsuite/experimental/simd/tests/hypot3_fma.cc: Ditto.
7139         * testsuite/experimental/simd/tests/ldexp_scalbn_scalbln_modf.cc:
7140         Ditto.
7141         * testsuite/experimental/simd/tests/logarithm.cc: Ditto.
7142         * testsuite/experimental/simd/tests/math_1arg.cc: Ditto.
7143         * testsuite/experimental/simd/tests/math_2arg.cc: Ditto.
7144         * testsuite/experimental/simd/tests/remqo.cc: Ditto.
7145         * testsuite/experimental/simd/tests/trigonometric.cc: Ditto.
7146         * testsuite/experimental/simd/tests/trunc_ceil_floor.cc: Ditto.
7147         * testsuite/experimental/simd/tests/sincos.cc: Ditto. In
7148         addition, xfail on run because the reference data is missing.
7149
7150 2021-02-02  Jonathan Wakely  <jwakely@redhat.com>
7151
7152         * doc/xml/manual/status_cxx2011.xml: Remove stray table cell.
7153         * doc/xml/manual/status_cxx2014.xml: Likewise.
7154         * doc/xml/manual/status_cxx2017.xml: Likewise.
7155         * doc/html/manual/status.html: Regenerate.
7156
7157 2021-02-01  François Dumont  <fdumont@gcc.gnu.org>
7158
7159         PR libstdc++/70303
7160         * include/bits/stl_deque.h (std::deque<>::operator-(iterator, iterator)):
7161         Return 0 if both iterators are value-initialized.
7162         * testsuite/23_containers/deque/70303.cc: New test.
7163         * testsuite/23_containers/vector/70303.cc: New test.
7164
7165 2021-02-01  Jonathan Wakely  <jwakely@redhat.com>
7166
7167         * doc/xml/manual/status_cxx2011.xml: Update std::call_once
7168         status.
7169         * doc/xml/manual/status_cxx2014.xml: Likewise.
7170         * doc/xml/manual/status_cxx2017.xml: Likewise. Update
7171         std::from_chars and std::to_chars status. Fix formatting.
7172         * doc/html/manual/status.html: Regenerate.
7173
7174 2021-01-28  Jonathan Wakely  <jwakely@redhat.com>
7175
7176         * include/experimental/bits/numeric_traits.h: Update copyright
7177         dates.
7178         * include/experimental/bits/simd.h: Likewise.
7179         * include/experimental/bits/simd_builtin.h: Likewise.
7180         * include/experimental/bits/simd_converter.h: Likewise.
7181         * include/experimental/bits/simd_detail.h: Likewise.
7182         * include/experimental/bits/simd_fixed_size.h: Likewise.
7183         * include/experimental/bits/simd_math.h: Likewise.
7184         * include/experimental/bits/simd_neon.h: Likewise.
7185         * include/experimental/bits/simd_ppc.h: Likewise.
7186         * include/experimental/bits/simd_scalar.h: Likewise.
7187         * include/experimental/bits/simd_x86.h: Likewise.
7188         * include/experimental/bits/simd_x86_conversions.h: Likewise.
7189         * include/experimental/simd: Likewise.
7190         * testsuite/experimental/simd/*: Likewise.
7191
7192 2021-01-27  Jonathan Wakely  <jwakely@redhat.com>
7193
7194         * doc/xml/manual/status_cxx2017.xml: Replace invalid entity.
7195         * doc/html/*: Regenerate.
7196
7197 2021-01-27  Jonathan Wakely  <jwakely@redhat.com>
7198
7199         * testsuite/experimental/simd/generate_makefile.sh: Use printf
7200         instead of echo when printing escape characters.
7201
7202 2021-01-27  Matthias Kretz  <kretz@kde.org>
7203
7204         * scripts/check_simd: New file. This script is called from the
7205         the check-simd target. It determines a set of compiler flags and
7206         simulator setups for calling generate_makefile.sh and passes the
7207         information back to the check-simd target, which recurses to the
7208         generated Makefiles.
7209         * scripts/create_testsuite_files: Remove files below simd/tests/
7210         from testsuite_files and place them in testsuite_files_simd.
7211         * testsuite/Makefile.am: Add testsuite_files_simd. Add
7212         check-simd target.
7213         * testsuite/Makefile.in: Regenerate.
7214         * testsuite/experimental/simd/driver.sh: New file. This script
7215         compiles and runs a given simd test, logging its output and
7216         status. It uses the timeout command to implement compile and
7217         test timeouts.
7218         * testsuite/experimental/simd/generate_makefile.sh: New file.
7219         This script generates a Makefile which uses driver.sh to compile
7220         and run the tests and collect the logs into a single log file.
7221         * testsuite/experimental/simd/tests/abs.cc: New file. Tests
7222         abs(simd).
7223         * testsuite/experimental/simd/tests/algorithms.cc: New file.
7224         Tests min/max(simd, simd).
7225         * testsuite/experimental/simd/tests/bits/conversions.h: New
7226         file. Contains functions to support tests involving conversions.
7227         * testsuite/experimental/simd/tests/bits/make_vec.h: New file.
7228         Support functions make_mask and make_vec.
7229         * testsuite/experimental/simd/tests/bits/mathreference.h: New
7230         file. Support functions to supply precomputed math function
7231         reference data.
7232         * testsuite/experimental/simd/tests/bits/metahelpers.h: New
7233         file. Support code for SFINAE testing.
7234         * testsuite/experimental/simd/tests/bits/simd_view.h: New file.
7235         * testsuite/experimental/simd/tests/bits/test_values.h: New
7236         file. Test functions to easily drive a test with simd objects
7237         initialized from a given list of values and a range of random
7238         values.
7239         * testsuite/experimental/simd/tests/bits/ulp.h: New file.
7240         Support code to determine the ULP distance of simd objects.
7241         * testsuite/experimental/simd/tests/bits/verify.h: New file.
7242         Test framework for COMPARE'ing simd objects and instantiating
7243         the test templates with value_type and ABI tag.
7244         * testsuite/experimental/simd/tests/broadcast.cc: New file. Test
7245         simd broadcasts.
7246         * testsuite/experimental/simd/tests/casts.cc: New file. Test
7247         simd casts.
7248         * testsuite/experimental/simd/tests/fpclassify.cc: New file.
7249         Test floating-point classification functions.
7250         * testsuite/experimental/simd/tests/frexp.cc: New file. Test
7251         frexp(simd).
7252         * testsuite/experimental/simd/tests/generator.cc: New file. Test
7253         simd generator constructor.
7254         * testsuite/experimental/simd/tests/hypot3_fma.cc: New file.
7255         Test 3-arg hypot(simd,simd,simd) and fma(simd,simd,sim).
7256         * testsuite/experimental/simd/tests/integer_operators.cc: New
7257         file. Test integer operators.
7258         * testsuite/experimental/simd/tests/ldexp_scalbn_scalbln_modf.cc:
7259         New file. Test ldexp(simd), scalbn(simd), scalbln(simd), and
7260         modf(simd).
7261         * testsuite/experimental/simd/tests/loadstore.cc: New file. Test
7262         (converting) simd loads and stores.
7263         * testsuite/experimental/simd/tests/logarithm.cc: New file. Test
7264         log*(simd).
7265         * testsuite/experimental/simd/tests/mask_broadcast.cc: New file.
7266         Test simd_mask broadcasts.
7267         * testsuite/experimental/simd/tests/mask_conversions.cc: New
7268         file. Test simd_mask conversions.
7269         * testsuite/experimental/simd/tests/mask_implicit_cvt.cc: New
7270         file. Test simd_mask implicit conversions.
7271         * testsuite/experimental/simd/tests/mask_loadstore.cc: New file.
7272         Test simd_mask loads and stores.
7273         * testsuite/experimental/simd/tests/mask_operator_cvt.cc: New
7274         file. Test simd_mask operators convert as specified.
7275         * testsuite/experimental/simd/tests/mask_operators.cc: New file.
7276         Test simd_mask compares, subscripts, and negation.
7277         * testsuite/experimental/simd/tests/mask_reductions.cc: New
7278         file. Test simd_mask reductions.
7279         * testsuite/experimental/simd/tests/math_1arg.cc: New file. Test
7280         1-arg math functions on simd.
7281         * testsuite/experimental/simd/tests/math_2arg.cc: New file. Test
7282         2-arg math functions on simd.
7283         * testsuite/experimental/simd/tests/operator_cvt.cc: New file.
7284         Test implicit conversions on simd binary operators behave as
7285         specified.
7286         * testsuite/experimental/simd/tests/operators.cc: New file. Test
7287         simd compares, subscripts, not, unary minus, plus, minus,
7288         multiplies, divides, increment, and decrement.
7289         * testsuite/experimental/simd/tests/reductions.cc: New file.
7290         Test reduce(simd).
7291         * testsuite/experimental/simd/tests/remqo.cc: New file. Test
7292         remqo(simd).
7293         * testsuite/experimental/simd/tests/simd.cc: New file. Basic
7294         sanity checks of simd types.
7295         * testsuite/experimental/simd/tests/sincos.cc: New file. Test
7296         sin(simd) and cos(simd).
7297         * testsuite/experimental/simd/tests/split_concat.cc: New file.
7298         Test split(simd) and concat(simd, simd).
7299         * testsuite/experimental/simd/tests/splits.cc: New file. Test
7300         split(simd_mask).
7301         * testsuite/experimental/simd/tests/trigonometric.cc: New file.
7302         Test remaining trigonometric functions on simd.
7303         * testsuite/experimental/simd/tests/trunc_ceil_floor.cc: New
7304         file. Test trunc(simd), ceil(simd), and floor(simd).
7305         * testsuite/experimental/simd/tests/where.cc: New file. Test
7306         masked operations using where.
7307
7308 2021-01-27  Matthias Kretz  <kretz@kde.org>
7309
7310         * doc/xml/manual/status_cxx2017.xml: Add implementation status
7311         of the Parallelism TS 2. Document implementation-defined types
7312         and behavior.
7313         * include/Makefile.am: Add new headers.
7314         * include/Makefile.in: Regenerate.
7315         * include/experimental/simd: New file. New header for
7316         Parallelism TS 2.
7317         * include/experimental/bits/numeric_traits.h: New file.
7318         Implementation of P1841R1 using internal naming. Addition of
7319         missing IEC559 functionality query.
7320         * include/experimental/bits/simd.h: New file. Definition of the
7321         public simd interfaces and general implementation helpers.
7322         * include/experimental/bits/simd_builtin.h: New file.
7323         Implementation of the _VecBuiltin simd_abi.
7324         * include/experimental/bits/simd_converter.h: New file. Generic
7325         simd conversions.
7326         * include/experimental/bits/simd_detail.h: New file. Internal
7327         macros for the simd implementation.
7328         * include/experimental/bits/simd_fixed_size.h: New file. Simd
7329         fixed_size ABI specific implementations.
7330         * include/experimental/bits/simd_math.h: New file. Math
7331         overloads for simd.
7332         * include/experimental/bits/simd_neon.h: New file. Simd NEON
7333         specific implementations.
7334         * include/experimental/bits/simd_ppc.h: New file. Implement bit
7335         shifts to avoid invalid results for integral types smaller than
7336         int.
7337         * include/experimental/bits/simd_scalar.h: New file. Simd scalar
7338         ABI specific implementations.
7339         * include/experimental/bits/simd_x86.h: New file. Simd x86
7340         specific implementations.
7341         * include/experimental/bits/simd_x86_conversions.h: New file.
7342         x86 specific conversion optimizations. The conversion patterns
7343         work around missing conversion patterns in the compiler and
7344         should be removed as soon as PR85048 is resolved.
7345         * testsuite/experimental/simd/standard_abi_usable.cc: New file.
7346         Test that all (not all fixed_size<N>, though) standard simd and
7347         simd_mask types are usable.
7348         * testsuite/experimental/simd/standard_abi_usable_2.cc: New
7349         file. As above but with -ffast-math.
7350         * testsuite/libstdc++-dg/conformance.exp: Don't build simd tests
7351         from the standard test loop. Instead use
7352         check_vect_support_and_set_flags to build simd tests with the
7353         relevant machine flags.
7354
7355 2021-01-27  Jonathan Wakely  <jwakely@redhat.com>
7356
7357         PR libstdc++/66414
7358         * include/bits/string_view.tcc
7359         (basic_string_view::find(const CharT*, size_type, size_type)):
7360         Optimize.
7361
7362 2021-01-27  Paul Fee  <paul.f.fee@gmail.com>
7363
7364         * include/bits/basic_string.h (basic_string::contains): New
7365         member functions.
7366         * include/std/string_view (basic_string_view::contains):
7367         Likewise.
7368         * include/std/version (__cpp_lib_string_contains): Define.
7369         * testsuite/21_strings/basic_string/operations/starts_with/char/1.cc:
7370         Remove trailing whitespace.
7371         * testsuite/21_strings/basic_string/operations/starts_with/wchar_t/1.cc:
7372         Likewise.
7373         * testsuite/21_strings/basic_string/operations/contains/char/1.cc: New test.
7374         * testsuite/21_strings/basic_string/operations/contains/wchar_t/1.cc: New test.
7375         * testsuite/21_strings/basic_string_view/operations/contains/char/1.cc: New test.
7376         * testsuite/21_strings/basic_string_view/operations/contains/char/2.cc: New test.
7377         * testsuite/21_strings/basic_string_view/operations/contains/wchar_t/1.cc: New test.
7378
7379 2021-01-21  Jonathan Wakely  <jwakely@redhat.com>
7380
7381         * src/c++17/Makefile.in: Regenerate.
7382
7383 2021-01-20  David Edelsohn  <dje.gcc@gmail.com>
7384
7385         * config/os/aix/ctype_inline.h (bool ctype<char>:: is): Cast
7386         _OBJ_DATA subscript to unsigned char. Add _THREAD_SAFE access to
7387         __lc_type.
7388         (const char* ctype<char>:: is): Same.
7389
7390 2021-01-18  Jonathan Wakely  <jwakely@redhat.com>
7391
7392         PR libstdc++/98725
7393         * testsuite/20_util/unique_ptr/io/lwg2948.cc:  Do not try to
7394         write to a wide character stream if wide character support is
7395         disabled in the library.
7396
7397 2021-01-18  Jonathan Wakely  <jwakely@redhat.com>
7398
7399         * testsuite/27_io/basic_stringstream/cons/char/1.cc: Use
7400         stringbuf not wstringbuf.
7401
7402 2021-01-18  Jakub Jelinek  <jakub@redhat.com>
7403
7404         PR debug/98708
7405         * src/c++11/Makefile.am (cxx11-ios_failure-lt.s, cxx11-ios_failure.s):
7406         Compile with -gno-as-loc-support.
7407         * src/c++11/Makefile.in: Regenerated.
7408
7409 2021-01-16  H.J. Lu  <hjl.tools@gmail.com>
7410
7411         * testsuite/29_atomics/atomic_flag/test_and_set/explicit-hle.cc:
7412         Add -fcf-protection=none to -march=i486.
7413
7414 2021-01-14  François Dumont  <fdumont@gcc.gnu.org>
7415
7416         * testsuite/23_containers/deque/debug/98466.cc: Make it pre-C++11
7417         compliant.
7418
7419 2021-01-14  Alexandre Oliva  <oliva@adacore.com>
7420
7421         * testsuite/30_threads/future/members/poll.cc: Calibrate
7422         iteration count.
7423
7424 2021-01-14  François Dumont  <fdumont@gcc.gnu.org>
7425
7426         PR libstdc++/98466
7427         * include/bits/hashtable_policy.h (_Node_iterator_base()): Set _M_cur to nullptr.
7428         (_Node_iterator()): Make default.
7429         (_Node_const_iterator()): Make default.
7430         * include/debug/macros.h (__glibcxx_check_erae_range_after): Add _M_singular
7431         iterator checks.
7432         * include/debug/safe_iterator.h
7433         (_GLIBCXX_DEBUG_VERIFY_OPERANDS): Accept if both iterator are value initialized.
7434         * include/debug/safe_local_iterator.h (_GLIBCXX_DEBUG_VERIFY_OPERANDS):
7435         Likewise.
7436         * include/debug/safe_iterator.tcc (_Safe_iterator<>::_M_valid_range): Add
7437         _M_singular checks on input iterators.
7438         * src/c++11/debug.cc (_Safe_iterator_base::_M_can_compare): Remove _M_singular
7439         checks.
7440         * testsuite/23_containers/deque/debug/98466.cc: New test.
7441         * testsuite/23_containers/unordered_map/debug/98466.cc: New test.
7442
7443 2021-01-14  Jonathan Wakely  <jwakely@redhat.com>
7444
7445         PR libstdc++/98471
7446         * include/bits/fs_path.h (__throw_conversion_error): New
7447         function to throw or abort on character conversion errors.
7448         (__wstr_from_utf8): Move definition after filesystem_error has
7449         been defined. Use __throw_conversion_error.
7450         (path::_S_convert<_EcharT>): Use __throw_conversion_error.
7451         (path::_S_str_convert<_CharT, _Traits, _Allocator>): Likewise.
7452         (path::u8string): Likewise.
7453
7454 2021-01-14  Jonathan Wakely  <jwakely@redhat.com>
7455
7456         * include/std/barrier: Update copyright years. Fix whitespace.
7457         * include/std/version: Fix whitespace.
7458         * testsuite/30_threads/barrier/1.cc: Update copyright years.
7459         * testsuite/30_threads/barrier/2.cc: Likewise.
7460         * testsuite/30_threads/barrier/arrive.cc: Likewise.
7461         * testsuite/30_threads/barrier/arrive_and_drop.cc: Likewise.
7462         * testsuite/30_threads/barrier/arrive_and_wait.cc: Likewise.
7463         * testsuite/30_threads/barrier/completion.cc: Likewise.
7464
7465 2021-01-13  Jonathan Wakely  <jwakely@redhat.com>
7466
7467         * doc/doxygen/user.cfg.in (INPUT): Remove include/debug/array.
7468
7469 2021-01-10  David Edelsohn  <dje.gcc@gmail.com>
7470
7471         PR libstdc++/98613
7472         * testsuite/ext/vstring/cons/moveable.cc: Suppress false positive
7473         warning.
7474         * testsuite/ext/vstring/modifiers/assign/move_assign.cc: Same.
7475
7476 2021-01-08  Olivier Hainque  <hainque@adacore.com>
7477
7478         * testsuite/20_util/bind/ref_neg.cc: Tweak the
7479         dg-prune-output regex for out-of-build-tree contexts.
7480
7481 2021-01-07  Thomas Rodgers  <trodgers@redhat.com>
7482
7483         * doc/doxygen/user.cfg.in: Add new header.
7484         * include/Makefile.am (std_headers): likewise.
7485         * include/Makefile.in: Regenerate.
7486         * include/precompiled/stdc++.h: Add new header.
7487         * include/std/barrier: New file.
7488         * include/std/version: Add __cpp_lib_barrier feature test macro.
7489         * testsuite/30_threads/barrier/1.cc: New test.
7490         * testsuite/30_threads/barrier/2.cc: Likewise.
7491         * testsuite/30_threads/barrier/arrive_and_drop.cc: Likewise.
7492         * testsuite/30_threads/barrier/arrive_and_wait.cc: Likewise.
7493         * testsuite/30_threads/barrier/arrive.cc: Likewise.
7494         * testsuite/30_threads/barrier/completion.cc: Likewise.
7495
7496 2021-01-07  Patrick Palka  <ppalka@redhat.com>
7497
7498         PR libstdc++/98384
7499         * testsuite/20_util/to_chars/long_double.cc: Use nexttowardl
7500         instead of the non-standard nextupl and nextdownl.
7501
7502 2021-01-05  Samuel Thibault  <samuel.thibault@ens-lyon.org>
7503
7504         * configure: Re-generate.
7505
7506 2021-01-05  Ed Smith-Rowland  <3dw4rd@verizon.net>
7507
7508         * include/precompiled/stdc++.h: Add <source_location> to C++20 section.
7509
7510 2021-01-01  Jakub Jelinek  <jakub@redhat.com>
7511
7512         * ChangeLog-2020: Rotate ChangeLog.  New file.
7513
7514 \f
7515 Copyright (C) 2021 Free Software Foundation, Inc.
7516
7517 Copying and distribution of this file, with or without modification,
7518 are permitted in any medium without royalty provided the copyright
7519 notice and this notice are preserved.