libstdc++-v3/ChangeLog

   1 2021-11-12  Jonathan Wakely  <jwakely@redhat.com>
   2
   3         PR libstdc++/59675
   4         * acinclude.m4 (libtool_VERSION): Bump version.
   5         * config/abi/pre/gnu.ver (GLIBCXX_3.4.30): Add version and
   6         export new symbol.
   7         * configure: Regenerate.
   8         * include/bits/c++config (__replacement_assert): Remove, declare
   9         __glibcxx_assert_fail instead.
  10         * src/c++11/debug.cc (__glibcxx_assert_fail): New function to
  11         replace __replacement_assert, writing to stderr instead of
  12         stdout.
  13         * testsuite/util/testsuite_abi.cc: Update latest version.
  14
  15 2021-11-12  Jonathan Wakely  <jwakely@redhat.com>
  16             Josh Marshall  <joshua.r.marshall.1991@gmail.com>
  17
  18         * include/bits/alloc_traits.h (_Destroy): Make constexpr for
  19         C++20 mode.
  20         * include/bits/allocator.h (__shrink_to_fit::_S_do_it):
  21         Likewise.
  22         * include/bits/stl_algobase.h (__fill_a1): Declare _Bit_iterator
  23         overload constexpr for C++20.
  24         * include/bits/stl_bvector.h (_Bit_type, _S_word_bit): Move out
  25         of inline namespace.
  26         (_Bit_reference, _Bit_iterator_base, _Bit_iterator)
  27         (_Bit_const_iterator, _Bvector_impl_data, _Bvector_base)
  28         (vector<bool, A>>): Add constexpr to every member function.
  29         (_Bvector_base::_M_allocate): Initialize storage during constant
  30         evaluation.
  31         (vector<bool, A>::_M_initialize_value): Use __fill_bvector_n
  32         instead of memset.
  33         (__fill_bvector_n): New helper function to replace memset during
  34         constant evaluation.
  35         * include/bits/stl_uninitialized.h (__uninitialized_copy<false>):
  36         Move logic to ...
  37         (__do_uninit_copy): New function.
  38         (__uninitialized_fill<false>): Move logic to ...
  39         (__do_uninit_fill): New function.
  40         (__uninitialized_fill_n<false>): Move logic to ...
  41         (__do_uninit_fill_n): New function.
  42         (__uninitialized_copy_a): Add constexpr. Use __do_uninit_copy.
  43         (__uninitialized_move_a, __uninitialized_move_if_noexcept_a):
  44         Add constexpr.
  45         (__uninitialized_fill_a): Add constexpr. Use __do_uninit_fill.
  46         (__uninitialized_fill_n_a): Add constexpr. Use
  47         __do_uninit_fill_n.
  48         (__uninitialized_default_n, __uninitialized_default_n_a)
  49         (__relocate_a_1, __relocate_a): Add constexpr.
  50         * include/bits/stl_vector.h (_Vector_impl_data, _Vector_impl)
  51         (_Vector_base, vector): Add constexpr to every member function.
  52         (_Vector_impl::_S_adjust): Disable ASan annotation during
  53         constant evaluation.
  54         (_Vector_base::_S_use_relocate): Disable bitwise-relocation
  55         during constant evaluation.
  56         (vector::_Temporary_value): Use a union for storage.
  57         * include/bits/vector.tcc (vector, vector<bool>): Add constexpr
  58         to every member function.
  59         * include/std/vector (erase_if, erase): Add constexpr.
  60         * testsuite/23_containers/headers/vector/synopsis.cc: Add
  61         constexpr for C++20 mode.
  62         * testsuite/23_containers/vector/bool/cmp_c++20.cc: Change to
  63         compile-only test using constant expressions.
  64         * testsuite/23_containers/vector/bool/capacity/29134.cc: Adjust
  65         namespace for _S_word_bit.
  66         * testsuite/23_containers/vector/bool/modifiers/insert/31370.cc:
  67         Likewise.
  68         * testsuite/23_containers/vector/cmp_c++20.cc: Likewise.
  69         * testsuite/23_containers/vector/cons/89164.cc: Adjust errors
  70         for C++20 and move C++17 test to ...
  71         * testsuite/23_containers/vector/cons/89164_c++17.cc: ... here.
  72         * testsuite/23_containers/vector/bool/capacity/constexpr.cc: New test.
  73         * testsuite/23_containers/vector/bool/cons/constexpr.cc: New test.
  74         * testsuite/23_containers/vector/bool/element_access/constexpr.cc: New test.
  75         * testsuite/23_containers/vector/bool/modifiers/assign/constexpr.cc: New test.
  76         * testsuite/23_containers/vector/bool/modifiers/constexpr.cc: New test.
  77         * testsuite/23_containers/vector/bool/modifiers/swap/constexpr.cc: New test.
  78         * testsuite/23_containers/vector/capacity/constexpr.cc: New test.
  79         * testsuite/23_containers/vector/cons/constexpr.cc: New test.
  80         * testsuite/23_containers/vector/data_access/constexpr.cc: New test.
  81         * testsuite/23_containers/vector/element_access/constexpr.cc: New test.
  82         * testsuite/23_containers/vector/modifiers/assign/constexpr.cc: New test.
  83         * testsuite/23_containers/vector/modifiers/constexpr.cc: New test.
  84         * testsuite/23_containers/vector/modifiers/swap/constexpr.cc: New test.
  85
  86 2021-11-11  Jonathan Wakely  <jwakely@redhat.com>
  87
  88         * include/debug/deque (deque::operator=(const deque&)): Remove
  89         definition.
  90         * include/debug/list (list::operator=(const list&)): Likewise.
  91         * include/debug/map.h (map::operator=(const map&)): Likewise.
  92         * include/debug/multimap.h (multimap::operator=(const multimap&)):
  93         Likewise.
  94         * include/debug/multiset.h (multiset::operator=(const multiset&)):
  95         Likewise.
  96         * include/debug/set.h (set::operator=(const set&)): Likewise.
  97         * include/debug/string (basic_string::operator=(const basic_string&)):
  98         Likewise.
  99         * include/debug/vector (vector::operator=(const vector&)):
 100         Likewise.
 101         (_Safe_vector::operator=(const _Safe_vector&)): Define for
 102         C++98 as well.
 103
 104 2021-11-11  Jonathan Wakely  <jwakely@redhat.com>
 105
 106         * include/std/memory_resource (memory_resource::allocate):
 107         Implicitly create objects in the returned storage.
 108
 109 2021-11-11  Jonathan Wakely  <jwakely@redhat.com>
 110
 111         * include/bits/stl_bvector.h (vector<bool>::data()): Give
 112         protected access, and delete for C++11 and later.
 113
 114 2021-11-10  Jonathan Wakely  <jwakely@redhat.com>
 115
 116         PR libstdc++/100117
 117         * testsuite/17_intro/headers/c++1998/49745.cc: Explicitly list
 118         all C++ headers instead of including <bits/stdc++.h>
 119
 120 2021-11-10  Jonathan Wakely  <jwakely@redhat.com>
 121
 122         PR libstdc++/100748
 123         PR libstdc++/103133
 124         * config/os/gnu-linux/os_defines.h (_GLIBCXX_GTHREAD_USE_WEAK):
 125         Define for glibc 2.34 and later.
 126
 127 2021-11-09  François Dumont  <fdumont@gcc.gnu.org>
 128
 129         * include/bits/hashtable_policy.h (__distance_fw): Replace class keyword with
 130         typename.
 131         * include/bits/hashtable.h (_Hashtable<>::_M_merge_unique): Remove noexcept
 132         qualification. Use const_iterator for node extraction/reinsert.
 133         (_Hashtable<>::_M_merge_multi): Likewise. Compute new hash code before extract.
 134         * include/debug/safe_container.h (_Safe_container<>): Make all methods
 135         protected.
 136         * include/debug/safe_unordered_container.h
 137         (_Safe_unordered_container<>::_UContInvalidatePred<_ExtractKey, _Source>): New.
 138         (_Safe_unordered_container<>::_UMContInvalidatePred<_ExtractKey, _Source>): New.
 139         (_Safe_unordered_container<>::_UContMergeGuard<_Source, _InvalidatePred>): New.
 140         (_Safe_unordered_container<>::_S_uc_guard<_ExtractKey, _Source>): New.
 141         (_Safe_unordered_container<>::_S_umc_guard<_ExtractKey, _Source>): New.
 142         (_Safe_unordered_container<>::_M_invalide_all): Make public.
 143         (_Safe_unordered_container<>::_M_invalide_if): Likewise.
 144         (_Safe_unordered_container<>::_M_invalide_local_if): Likewise.
 145         * include/debug/unordered_map
 146         (unordered_map<>::mapped_type, pointer, const_pointer): New typedef.
 147         (unordered_map<>::reference, const_reference, difference_type): New typedef.
 148         (unordered_map<>::get_allocator, empty, size, max_size): Add usings.
 149         (unordered_map<>::bucket_count, max_bucket_count, bucket): Add usings.
 150         (unordered_map<>::hash_function, key_equal, count, contains): Add usings.
 151         (unordered_map<>::operator[], at, rehash, reserve): Add usings.
 152         (unordered_map<>::merge): New.
 153         (unordered_multimap<>::mapped_type, pointer, const_pointer): New typedef.
 154         (unordered_multimap<>::reference, const_reference, difference_type): New typedef.
 155         (unordered_multimap<>::get_allocator, empty, size, max_size): Add usings.
 156         (unordered_multimap<>::bucket_count, max_bucket_count, bucket): Add usings.
 157         (unordered_multimap<>::hash_function, key_equal, count, contains): Add usings.
 158         (unordered_multimap<>::rehash, reserve): Add usings.
 159         (unordered_multimap<>::merge): New.
 160         * include/debug/unordered_set
 161         (unordered_set<>::mapped_type, pointer, const_pointer): New typedef.
 162         (unordered_set<>::reference, const_reference, difference_type): New typedef.
 163         (unordered_set<>::get_allocator, empty, size, max_size): Add usings.
 164         (unordered_set<>::bucket_count, max_bucket_count, bucket): Add usings.
 165         (unordered_set<>::hash_function, key_equal, count, contains): Add usings.
 166         (unordered_set<>::rehash, reserve): Add usings.
 167         (unordered_set<>::merge): New.
 168         (unordered_multiset<>::mapped_type, pointer, const_pointer): New typedef.
 169         (unordered_multiset<>::reference, const_reference, difference_type): New typedef.
 170         (unordered_multiset<>::get_allocator, empty, size, max_size): Add usings.
 171         (unordered_multiset<>::bucket_count, max_bucket_count, bucket): Add usings.
 172         (unordered_multiset<>::hash_function, key_equal, count, contains): Add usings.
 173         (unordered_multiset<>::rehash, reserve): Add usings.
 174         (unordered_multiset<>::merge): New.
 175         * testsuite/23_containers/unordered_map/debug/merge1_neg.cc: New test.
 176         * testsuite/23_containers/unordered_map/debug/merge2_neg.cc: New test.
 177         * testsuite/23_containers/unordered_map/debug/merge3_neg.cc: New test.
 178         * testsuite/23_containers/unordered_map/debug/merge4_neg.cc: New test.
 179         * testsuite/23_containers/unordered_multimap/debug/merge1_neg.cc: New test.
 180         * testsuite/23_containers/unordered_multimap/debug/merge2_neg.cc: New test.
 181         * testsuite/23_containers/unordered_multimap/debug/merge3_neg.cc: New test.
 182         * testsuite/23_containers/unordered_multimap/debug/merge4_neg.cc: New test.
 183         * testsuite/23_containers/unordered_multiset/debug/merge1_neg.cc: New test.
 184         * testsuite/23_containers/unordered_multiset/debug/merge2_neg.cc: New test.
 185         * testsuite/23_containers/unordered_multiset/debug/merge3_neg.cc: New test.
 186         * testsuite/23_containers/unordered_multiset/debug/merge4_neg.cc: New test.
 187         * testsuite/23_containers/unordered_set/debug/merge1_neg.cc: New test.
 188         * testsuite/23_containers/unordered_set/debug/merge2_neg.cc: New test.
 189         * testsuite/23_containers/unordered_set/debug/merge3_neg.cc: New test.
 190         * testsuite/23_containers/unordered_set/debug/merge4_neg.cc: New test.
 191         * testsuite/util/testsuite_abi.h: [_GLIBCXX_DEBUG] Use normal unordered
 192         container implementation.
 193
 194 2021-11-09  Jonathan Wakely  <jwakely@redhat.com>
 195
 196         * testsuite/26_numerics/random/random_device/cons/token.cc:
 197         Print results of random_device_available checks.
 198
 199 2021-11-09  Jonathan Wakely  <jwakely@redhat.com>
 200
 201         PR libstdc++/103146
 202         * src/c++11/random.cc: Check __powerpc64__ not __powerpc__.
 203
 204 2021-11-09  Jonathan Wakely  <jwakely@redhat.com>
 205
 206         * acinclude.m4 (GLIBCXX_CHECK_GETENTROPY, GLIBCXX_CHECK_ARC4RANDOM):
 207         Define.
 208         * configure.ac (GLIBCXX_CHECK_GETENTROPY, GLIBCXX_CHECK_ARC4RANDOM):
 209         Use them.
 210         * config.h.in: Regenerate.
 211         * configure: Regenerate.
 212         * src/c++11/random.cc (random_device): Add getentropy and
 213         arc4random as sources.
 214         * testsuite/26_numerics/random/random_device/cons/token.cc:
 215         Check new tokens.
 216         * testsuite/26_numerics/random/random_device/entropy.cc:
 217         Likewise.
 218
 219 2021-11-09  Jonathan Wakely  <jwakely@redhat.com>
 220
 221         * testsuite/26_numerics/random/random_device/cons/token.cc:
 222         Retry if random devices produce the same value.
 223
 224 2021-11-09  Rasmus Villemoes  <rasmus.villemoes@prevas.dk>
 225
 226         * config/os/vxworks/os_defines.h (_GLIBCXX_HAVE_TLS): Only
 227         define for VxWorks >= 6.6.
 228
 229 2021-11-05  Jonathan Wakely  <jwakely@redhat.com>
 230
 231         * include/bits/range_access.h (begin(valarray), end(valarray)):
 232         Add noexcept.
 233
 234 2021-11-05  Jonathan Wakely  <jwakely@redhat.com>
 235
 236         * include/std/tuple (tuple_size_v): Fix pack expansion.
 237
 238 2021-11-05  Jonathan Wakely  <jwakely@redhat.com>
 239
 240         * src/c++11/random.cc (__x86_rdrand, __x86_rdseed): Add
 241         [[unlikely]] attribute.
 242
 243 2021-11-05  Jonathan Wakely  <jwakely@redhat.com>
 244
 245         * src/c++11/random.cc [__powerpc__] (USE_DARN): Define.
 246         (__ppc_darn): New function to use POWER9 DARN instruction.
 247         (Which): Add 'darn' enumerator.
 248         (which_source): Check for __ppc_darn.
 249         (random_device::_M_init): Support "darn" and "hw" tokens.
 250         (random_device::_M_getentropy): Add darn to switch.
 251         * testsuite/26_numerics/random/random_device/cons/token.cc:
 252         Check "darn" token.
 253         * testsuite/26_numerics/random/random_device/entropy.cc:
 254         Likewise.
 255
 256 2021-11-05  Jonathan Wakely  <jwakely@redhat.com>
 257
 258         * testsuite/lib/gdb-test.exp: Add target selector support to the
 259         dg-final directives.
 260         * testsuite/libstdc++-prettyprinters/80276.cc: Add xfail for
 261         C++20.
 262         * testsuite/libstdc++-prettyprinters/libfundts.cc: Likewise.
 263         * testsuite/libstdc++-prettyprinters/prettyprinters.exp: Tweak
 264         comment.
 265
 266 2021-11-04  Jonathan Wakely  <jwakely@redhat.com>
 267
 268         PR libstdc++/103086
 269         * python/libstdcxx/v6/printers.py (_tuple_impl_get): New helper
 270         for accessing the tuple element stored in a _Tuple_impl node.
 271         (tuple_get): New function for accessing a tuple element.
 272         (unique_ptr_get): New function for accessing a unique_ptr.
 273         (UniquePointerPrinter, StdPathPrinter): Use unique_ptr_get.
 274         * python/libstdcxx/v6/xmethods.py (UniquePtrGetWorker): Cast
 275         tuple to its base class before accessing _M_head_impl.
 276
 277 2021-11-04  Jonathan Wakely  <jwakely@redhat.com>
 278
 279         * doc/xml/manual/evolution.xml: Document deprecations.
 280         * doc/html/*: Regenerate.
 281         * libsupc++/exception (unexpected_handler, unexpected)
 282         (get_unexpected, set_unexpected): Add deprecated attribute.
 283         Do not define without _GLIBCXX_USE_DEPRECATED for C++17 and up.
 284         * libsupc++/eh_personality.cc (PERSONALITY_FUNCTION): Disable
 285         deprecated warnings.
 286         * libsupc++/eh_ptr.cc (std::rethrow_exception): Likewise.
 287         * libsupc++/eh_terminate.cc: Likewise.
 288         * libsupc++/eh_throw.cc (__cxa_init_primary_exception):
 289         Likewise.
 290         * libsupc++/unwind-cxx.h (struct __cxa_exception): Use
 291         terminate_handler instead of unexpected_handler.
 292         (struct __cxa_dependent_exception): Likewise.
 293         (__unexpected): Likewise.
 294         * testsuite/18_support/headers/exception/synopsis.cc: Add
 295         dg-warning for deprecated warning.
 296         * testsuite/18_support/exception_ptr/60612-unexpected.cc:
 297         Disable deprecated warnings.
 298         * testsuite/18_support/set_unexpected.cc: Likewise.
 299         * testsuite/18_support/unexpected_handler.cc: Likewise.
 300
 301 2021-11-04  Jonathan Wakely  <jwakely@redhat.com>
 302
 303         * include/bits/utility.h (__find_uniq_type_in_pack): Move
 304         definition to here, ...
 305         * include/std/tuple (__find_uniq_type_in_pack): ... from here.
 306         * include/std/variant (__detail__variant::__index_of): Remove.
 307         (__detail::__variant::__exactly_once): Define using
 308         __find_uniq_type_in_pack instead of __index_of.
 309         (get<T>, get_if<T>, variant::__index_of): Likewise.
 310
 311 2021-11-04  Jonathan Wakely  <jwakely@redhat.com>
 312
 313         * include/bits/stl_pair.h (tuple_size_v): Define partial
 314         specializations for std::pair.
 315         * include/bits/utility.h (_Nth_type): Move definition here
 316         and define primary template.
 317         (tuple_size_v): Move definition here.
 318         * include/std/array (tuple_size_v): Define partial
 319         specializations for std::array.
 320         * include/std/tuple (tuple_size_v): Move primary template to
 321         <bits/utility.h>.  Define partial specializations for
 322         std::tuple.
 323         (tuple_element): Change definition to use _Nth_type.
 324         * include/std/variant (_Nth_type): Move to <bits/utility.h>.
 325         (variant_alternative, variant): Adjust qualification of
 326         _Nth_type.
 327         * testsuite/20_util/tuple/element_access/get_neg.cc: Prune
 328         additional errors from _Nth_type.
 329
 330 2021-11-04  Jonathan Wakely  <jwakely@redhat.com>
 331
 332         * include/std/variant (__detail::__variant::__emplace): New
 333         function template.
 334         (_Copy_assign_base::operator=): Reorder conditions to match
 335         bulleted list of effects in the standard. Use __emplace instead
 336         of _M_reset followed by _Construct.
 337         (_Move_assign_base::operator=): Likewise.
 338         (__construct_by_index): Remove.
 339         (variant::emplace): Use __emplace instead of _M_reset followed
 340         by __construct_by_index.
 341         (variant::swap): Hoist valueless cases out of visitor. Use
 342         __emplace to replace _M_reset followed by _Construct.
 343
 344 2021-11-04  Jonathan Wakely  <jwakely@redhat.com>
 345
 346         * include/std/variant (_Nth_type): Define partial
 347         specializations to reduce number of instantiations.
 348         (variant_size_v): Define partial specializations to avoid
 349         instantiations.
 350         (variant_alternative): Use _Nth_type. Add static assert.
 351         (__tuple_count, __tuple_count_v): Replace with ...
 352         (__count): New variable template.
 353         (_Variant_union): Add deleted constructor.
 354         (variant::__to_type): Use _Nth_type.
 355         (variant::emplace): Use _Nth_type. Add deleted overloads for
 356         invalid types and indices.
 357
 358 2021-11-04  Jonathan Wakely  <jwakely@redhat.com>
 359
 360         PR libstdc++/102912
 361         * include/std/variant (_Variant_storage::__index_of): Remove.
 362         (__variant_construct_single): Remove.
 363         (__variant_construct): Remove.
 364         (_Copy_ctor_base::_Copy_ctor_base(const _Copy_ctor_base&)): Do
 365         construction directly instead of using __variant_construct.
 366         (_Move_ctor_base::_Move_ctor_base(_Move_ctor_base&&)): Likewise.
 367         (_Move_ctor_base::_M_destructive_move()): Remove.
 368         (_Move_ctor_base::_M_destructive_copy()): Remove.
 369         (_Copy_assign_base::operator=(const _Copy_assign_base&)): Do
 370         construction directly instead of using _M_destructive_copy.
 371         (variant::swap): Do construction directly instead of using
 372         _M_destructive_move.
 373         * testsuite/20_util/variant/102912.cc: New test.
 374
 375 2021-11-03  Jonathan Wakely  <jwakely@redhat.com>
 376
 377         PR libstdc++/66742
 378         * include/bits/list.tcc (list::sort): Use mutable iterators for
 379         comparisons.
 380         * include/bits/stl_list.h (_Scratch_list::_Ptr_cmp): Likewise.
 381         * testsuite/23_containers/list/operations/66742.cc: Check
 382         non-const comparisons.
 383
 384 2021-11-03  Jonathan Wakely  <jwakely@redhat.com>
 385
 386         * include/std/valarray (valarray::valarray()): Add noexcept.
 387         (valarray::operator[]): Likewise.
 388
 389 2021-11-01  Jonathan Wakely  <jwakely@redhat.com>
 390
 391         * include/debug/stl_iterator.h (__valid_range): Add constexpr
 392         for C++20. Qualify call to avoid ADL.
 393         (__get_distance, __can_advance, __unsafe, __base): Likewise.
 394         * testsuite/25_algorithms/move/constexpr.cc: Also check with
 395         std::reverse_iterator arguments.
 396
 397 2021-11-01  Jonathan Wakely  <jwakely@redhat.com>
 398
 399         * include/std/span (span(Range&&)): Reorder constraints.
 400
 401 2021-11-01  Jonathan Wakely  <jwakely@redhat.com>
 402
 403         PR libstdc++/103022
 404         * include/std/valarray (begin, end): Do not dereference an empty
 405         valarray. Add noexcept and [[nodiscard]].
 406         * testsuite/26_numerics/valarray/range_access.cc: Check empty
 407         valarray. Check iterator properties. Run as well as compiling.
 408         * testsuite/26_numerics/valarray/range_access2.cc: Likewise.
 409         * testsuite/26_numerics/valarray/103022.cc: New test.
 410
 411 2021-10-29  Jonathan Wakely  <jwakely@redhat.com>
 412
 413         * testsuite/23_containers/stack/deduction.cc: Fix typo.
 414
 415 2021-10-26  Martin Sebor  <msebor@redhat.com>
 416
 417         * testsuite/21_strings/basic_string/capacity/1.cc: Also suppress
 418         -Wstringop-overread.
 419         * testsuite/27_io/filesystem/path/factory/u8path-char8_t.cc: Same.
 420
 421 2021-10-26  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
 422
 423         * testsuite/28_regex/basic_regex/84110.cc (test01)
 424         [__cpp_exceptions]: Disambiguate extended.
 425
 426 2021-10-26  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
 427
 428         * testsuite/17_intro/names.cc [__sun__] (r, x): Undef.
 429
 430 2021-10-22  Jonathan Wakely  <jwakely@redhat.com>
 431
 432         PR libstdc++/102894
 433         * include/std/any (make_any): Add SFINAE constraint.
 434         * testsuite/20_util/any/102894.cc: New test.
 435
 436 2021-10-21  Jonathan Wakely  <jwakely@redhat.com>
 437
 438         * doc/doxygen/stdheader.cc: Refactor. Use C++23. Add new
 439         headers.
 440         * scripts/run_doxygen: Fix post-processing of #include
 441         directives in man pages. Use new xg++ to compile helper program.
 442
 443 2021-10-21  Jonathan Wakely  <jwakely@redhat.com>
 444
 445         * include/bits/mofunc_impl.h: Add doxygen comments.
 446         * include/std/functional: Likewise.
 447
 448 2021-10-21  Jonathan Wakely  <jwakely@redhat.com>
 449
 450         * include/bits/alloc_traits.h: Suppress doxygen documentation.
 451         * include/bits/allocated_ptr.h: Likewise.
 452         * include/bits/enable_special_members.h: Likewise.
 453         * include/bits/hashtable.h: Likewise.
 454         * include/bits/hashtable_policy.h: Likewise.
 455         * include/bits/uses_allocator.h: Likewise.
 456         * include/bits/node_handle.h: Document node handles and suppress
 457         documentation for protected members.
 458         * include/std/any: Suppress documentation for implementation
 459         details.
 460
 461 2021-10-21  Patrick Palka  <ppalka@redhat.com>
 462
 463         PR libstdc++/102358
 464         * include/bits/stl_iterator.h (__niter_base): Make constexpr
 465         for C++20.
 466         (__miter_base): Likewise.
 467         * testsuite/25_algorithms/move/constexpr.cc: New test.
 468
 469 2021-10-21  Patrick Palka  <ppalka@redhat.com>
 470
 471         * include/std/ranges (istream_view): Replace this function
 472         template with an alias template as per P2432R1.
 473         (wistream_view): Define as per P2432R1.
 474         (views::_Istream, views::istream): Likewise.
 475         * testsuite/std/ranges/istream_view.cc (test07): New test.
 476
 477 2021-10-21  Patrick Palka  <ppalka@redhat.com>
 478
 479         * include/bits/ranges_util.h (views::_Drop): Forward declare.
 480         (subrange): Befriend views::_Drop.
 481         (subrange::_S_store_size): Declare constexpr instead of just
 482         const, remove obsolete comment.
 483         * include/std/ranges (views::__detail::__is_empty_view): Define.
 484         (views::__detail::__is_basic_string_view): Likewise.
 485         (views::__detail::__is_subrange): Likewise.
 486         (views::__detail::__is_iota_view): Likewise.
 487         (views::__detail::__can_take_view): Rename template parm _Tp to _Dp.
 488         (views::_Take): Rename template parm _Tp to _Dp, make it non-deducible
 489         and fix it to range_difference_t<_Range>.  Implement P1739R4 and
 490         LWG 3407 changes.
 491         (views::__detail::__can_drop_view): Rename template parm _Tp to _Dp.
 492         (views::_Drop): As with views::_Take.
 493         (views::_Counted): Implement P1739R4 changes.
 494         * include/std/span (__detail::__is_std_span): Rename to ...
 495         (__detail::__is_span): ... this and turn it into a variable
 496         template.
 497         (__detail::__is_std_array): Turn it into a variable template.
 498         (span::span): Adjust uses of __is_std_span and __is_std_array
 499         accordingly.
 500         * testsuite/std/ranges/adaptors/p1739.cc: New test.
 501
 502 2021-10-21  Patrick Palka  <ppalka@redhat.com>
 503
 504         * include/bits/stl_iterator.h (common_iterator::__arrow_proxy):
 505         Make fully constexpr as per LWG 3595.
 506         (common_iterator::__postfix_proxy): Likewise.
 507
 508 2021-10-21  Patrick Palka  <ppalka@redhat.com>
 509
 510         * include/std/ranges (lazy_split_view::base): Add forward_range
 511         constraint as per LWG 3591.
 512         (lazy_split_view::begin, lazy_split_view::end): Also check
 513         simpleness of _Pattern as per LWG 3592.
 514         (split_view::base): Relax copyable constraint as per LWG 3590.
 515
 516 2021-10-21  Patrick Palka  <ppalka@redhat.com>
 517
 518         * include/std/ranges (join_view::__iter_cat::_S_iter_cat): Adjust
 519         criteria for returning bidirectional_iterator_tag as per LWG 3535.
 520         (join_view::_Iterator::_S_iter_concept): Likewise.
 521
 522 2021-10-21  Patrick Palka  <ppalka@redhat.com>
 523
 524         * include/bits/ranges_base.h (viewable_range): Adjust as per
 525         LWG 3481.
 526         * testsuite/std/ranges/adaptors/all.cc (test07): New test.
 527
 528 2021-10-21  Jonathan Wakely  <jwakely@redhat.com>
 529
 530         PR libstdc++/102863
 531         * include/std/optional (optional::and_then, optional::transform):
 532         Remove requires-clause.
 533         * testsuite/20_util/optional/monadic/and_then.cc: Check
 534         overload resolution doesn't cause errors.
 535         * testsuite/20_util/optional/monadic/transform.cc: Likewise.
 536
 537 2021-10-20  Jonathan Wakely  <jwakely@redhat.com>
 538
 539         * testsuite/20_util/optional/monadic/transform.cc: Check that
 540         an rvalue result is not materialized too soon.
 541
 542 2021-10-19  Patrick Palka  <ppalka@redhat.com>
 543
 544         * include/std/ranges (iota_view::_Iterator::operator+): Adjust
 545         definition as per LWG 3580.
 546         (iota_view::_Iterator::operator-): Likewise.
 547
 548 2021-10-19  Patrick Palka  <ppalka@redhat.com>
 549
 550         * include/std/ranges (basic_istream_view::_M_object): Value
 551         initialize as per LWG 3568.
 552
 553 2021-10-19  Patrick Palka  <ppalka@redhat.com>
 554
 555         * include/bits/ranges_util.h
 556         (__detail::__uses_nonqualification_pointer_conversion): Define
 557         and use it ...
 558         (__detail::__convertible_to_nonslicing): ... here, as per LWG 3470.
 559         * testsuite/std/ranges/subrange/1.cc: New test.
 560
 561 2021-10-19  Patrick Palka  <ppalka@redhat.com>
 562
 563         * include/std/ranges (iota_view::_Iterator): Befriend iota_view.
 564         (iota_view::_Sentinel): Likewise.
 565         (iota_view::iota_view): Add three overloads, each taking an
 566         iterator/sentinel pair as per LWG 3523.
 567         * testsuite/std/ranges/iota/iota_view.cc (test06): New test.
 568
 569 2021-10-19  Patrick Palka  <ppalka@redhat.com>
 570
 571         * include/bits/ranges_base.h (view_interface): Forward declare.
 572         (__detail::__is_derived_from_view_interface_fn): Declare.
 573         (__detail::__is_derived_from_view_interface): Define as per LWG 3549.
 574         (enable_view): Adjust as per LWG 3549.
 575         * include/bits/ranges_util.h (view_interface): Don't derive from
 576         view_base.
 577         * include/std/ranges (filter_view): Revert r11-3504 change.
 578         (transform_view): Likewise.
 579         (take_view): Likewise.
 580         (take_while_view): Likewise.
 581         (drop_view): Likewise.
 582         (drop_while_view): Likewise.
 583         (join_view): Likewise.
 584         (lazy_split_view): Likewise.
 585         (split_view): Likewise.
 586         (reverse_view): Likewise.
 587         * testsuite/std/ranges/adaptors/sizeof.cc: Update expected sizes.
 588         * testsuite/std/ranges/view.cc (test_view::test_view): Remove
 589         this default ctor since views no longer need to be default initable.
 590         (test01): New test.
 591
 592 2021-10-19  Jonathan Wakely  <jwakely@redhat.com>
 593
 594         * src/c++11/random.cc (which_source): New helper function.
 595         (random_device::_M_getentropy()): Use which_source and return
 596         suitable values for sources other than device files.
 597         * testsuite/26_numerics/random/random_device/entropy.cc: New test.
 598
 599 2021-10-19  Jonathan Wakely  <jwakely@redhat.com>
 600
 601         * doc/Makefile.am (stamp-html-doxygen, stamp-html-doxygen)
 602         (stamp-latex-doxygen, stamp-man-doxygen): Fix recipes for
 603         relative ${top_srcdir}.
 604         * doc/Makefile.in: Regenerate.
 605
 606 2021-10-19  Jonathan Wakely  <jwakely@redhat.com>
 607
 608         * include/std/variant (_Uninitialized): Use an empty struct
 609         for the unused union member, instead of char.
 610
 611 2021-10-19  Jonathan Wakely  <jwakely@redhat.com>
 612
 613         * include/bits/stl_stack.h (stack(Iterator, Iterator)): Remove
 614         non-deducible template parameter from deduction guide.
 615         * testsuite/23_containers/stack/deduction.cc: Check new C++23
 616         deduction guides.
 617
 618 2021-10-19  Jonathan Wakely  <jwakely@redhat.com>
 619
 620         * include/std/optional (_Optional_payload_base::_Storage): Add
 621         constructor taking a callable function to invoke.
 622         (_Optional_payload_base::_M_apply): New function.
 623         (__cpp_lib_monadic_optional): Define for C++23.
 624         (optional::and_then, optional::transform, optional::or_else):
 625         Define for C++23.
 626         * include/std/ranges (__detail::__cached): Remove.
 627         (__detail::__non_propagating_cache): Remove use of __cached for
 628         contained value. Use _Optional_payload_base::_M_construct and
 629         _Optional_payload_base::_M_apply to set the contained value.
 630         * include/std/version (__cpp_lib_monadic_optional): Define.
 631         * testsuite/20_util/optional/monadic/and_then.cc: New test.
 632         * testsuite/20_util/optional/monadic/or_else.cc: New test.
 633         * testsuite/20_util/optional/monadic/or_else_neg.cc: New test.
 634         * testsuite/20_util/optional/monadic/transform.cc: New test.
 635         * testsuite/20_util/optional/monadic/version.cc: New test.
 636
 637 2021-10-19  Jonathan Wakely  <jwakely@redhat.com>
 638
 639         PR libstdc++/102825
 640         * include/bits/mofunc_impl.h (move_only_function): Remove
 641         invalid base initializer.
 642         * testsuite/20_util/move_only_function/cons.cc: Instantiate
 643         constructors to check bodies.
 644
 645 2021-10-15  Jonathan Wakely  <jwakely@redhat.com>
 646
 647         * include/bits/fs_path.h (path::_S_convert(T)): Avoid recursive
 648         call to function with deduced return type.
 649
 650 2021-10-15  Jonathan Wakely  <jwakely@redhat.com>
 651
 652         * include/bits/basic_string.h (__cpp_lib_string_resize_and_overwrite):
 653         Define for C++23.
 654         (basic_string::resize_and_overwrite): Declare.
 655         * include/bits/basic_string.tcc (basic_string::resize_and_overwrite):
 656         Define.
 657         * include/std/version (__cpp_lib_resize_and_overwrite): Define
 658         for C++23.
 659         * testsuite/21_strings/basic_string/capacity/char/resize_and_overwrite.cc:
 660         New test.
 661
 662 2021-10-15  Jonathan Wakely  <jwakely@redhat.com>
 663
 664         PR libstdc++/101263
 665         * include/std/ranges (__cached): New wrapper struct.
 666         (__non_propagating_cache): Use __cached for contained value.
 667         (__non_propagating_cache::_M_emplace_deref): Add constexpr. Use
 668         std::construct_at instead of placement new.
 669         * testsuite/std/ranges/adaptors/join.cc: Check constexpr works.
 670
 671 2021-10-15  Jonathan Wakely  <jwakely@redhat.com>
 672
 673         * include/std/variant (__cpp_lib_variant): Update value for
 674         C++20.
 675         (__variant_cast, __variant_construct): Add constexpr for C++20.
 676         (__variant_construct_single, __construct_by_index) Likewise. Use
 677         std::_Construct instead of placement new.
 678         (_Uninitialized<T, false>) [__cplusplus >= 202002]: Replace
 679         buffer with a union and define a destructor.
 680         (_Variadic_union) [__cplusplus >= 202002]: Add a specialization
 681         for non-trivial destruction.
 682         (_Variant_storage::__index_of): New helper variable template.
 683         (_Variant_storage::~_Variant_storage()): Add constexpr.
 684         (_Variant_storage::_M_reset()): Likewise.
 685         (_Copy_ctor_base, _Move_ctor_base): Likewise.
 686         (_Copy_assign_base, _Move_assign_base): Likewise.
 687         (variant, swap): Likewise.
 688         * include/std/version (__cpp_lib_variant): Update value for
 689         C++20.
 690         * testsuite/20_util/optional/version.cc: Check for exact value
 691         in C++17.
 692         * testsuite/20_util/variant/87619.cc: Increase timeout for
 693         C++20 mode.
 694         * testsuite/20_util/variant/constexpr.cc: New test.
 695         * testsuite/20_util/variant/version.cc: New test.
 696
 697 2021-10-15  Jonathan Wakely  <jwakely@redhat.com>
 698
 699         * include/std/variant (__detail::__variant::__get_storage):
 700         Remove unused function.
 701         (__variant_construct_by_index): Set index after construction is
 702         complete. Rename to ...
 703         (__detail::__variant::__construct_by_index): ... this.
 704         (variant): Use new name for __variant_construct_by_index friend
 705         declaration. Remove __get_storage friend declaration.
 706         (variant::emplace): Use new name and remove try-blocks.
 707
 708 2021-10-15  Jonathan Wakely  <jwakely@redhat.com>
 709
 710         * include/std/variant (_Variant_storage::_M_storage()): Remove.
 711         (__detail::__variant::__get_storage): Remove.
 712         (variant): Remove friend declaration of __get_storage.
 713
 714 2021-10-15  Jason Merrill  <jason@redhat.com>
 715
 716         * testsuite/20_util/integer_comparisons/greater_equal_neg.cc:
 717         * testsuite/20_util/integer_comparisons/greater_neg.cc:
 718         * testsuite/20_util/integer_comparisons/less_equal_neg.cc:
 719         Adjust expected message.
 720         * testsuite/lib/prune.exp: Prune 'in constexpr expansion'.
 721
 722 2021-10-14  Jonathan Wakely  <jwakely@redhat.com>
 723
 724         * include/std/variant (__variant::__get(in_place_index_t<N>, U&&)):
 725         Rename to __get_n and remove first argument. Replace pair of
 726         overloads with a single function using 'if constexpr'.
 727         (__variant::__get(Variant&&)): Adjust to use __get_n.
 728
 729 2021-10-14  Jonathan Wakely  <jwakely@redhat.com>
 730
 731         * include/bits/fs_path.h (path(path&&)): Make unconditionally
 732         noexcept.
 733         (path::_S_convert(T)): Add condtional noexcept.
 734
 735 2021-10-14  Jonathan Wakely  <jwakely@redhat.com>
 736
 737         PR libstdc++/102743
 738         * include/bits/fs_path.h (path::_S_convert(T)): Fix condition
 739         for returning the same string unchanged.
 740
 741 2021-10-14  Jonathan Wakely  <jwakely@redhat.com>
 742
 743         * include/bits/regex.h: Check __cpp_inline_variables instead of
 744         __cplusplus.
 745
 746 2021-10-14  Jonathan Wakely  <jwakely@redhat.com>
 747
 748         * testsuite/20_util/is_layout_compatible/version.cc: Check
 749         correct macro.
 750
 751 2021-10-14  Jonathan Wakely  <jwakely@redhat.com>
 752
 753         * include/bits/stl_construct.h (_Construct): Use
 754         std::construct_at when constant evaluated.
 755         * include/std/optional (_Storage, _Optional_payload, optional):
 756         Add constexpr as specified by P2231R1.
 757         * include/std/version (__cpp_lib_optional): Update value for
 758         C++20.
 759         * testsuite/20_util/optional/requirements.cc: Check feature test
 760         macro.
 761         * testsuite/20_util/optional/constexpr/assign.cc: New test.
 762         * testsuite/20_util/optional/constexpr/cons/conv.cc: New test.
 763         * testsuite/20_util/optional/constexpr/modifiers.cc: New test.
 764         * testsuite/20_util/optional/constexpr/swap.cc: New test.
 765         * testsuite/20_util/optional/version.cc: New test.
 766
 767 2021-10-13  Jonathan Wakely  <jwakely@redhat.com>
 768
 769         * include/bits/fs_path.h (__detail::__is_contiguous): Add
 770         partial specializations for pointers and __normal_iterator.
 771
 772 2021-10-13  Jonathan Wakely  <jwakely@redhat.com>
 773
 774         * testsuite/27_io/filesystem/path/construct/102592.C: Moved to...
 775         * testsuite/27_io/filesystem/path/construct/102592.cc: ...here.
 776         * testsuite/28_regex/match_results/102667.C: Moved to...
 777         * testsuite/28_regex/match_results/102667.cc: ...here.
 778
 779 2021-10-13  Jonathan Wakely  <jwakely@redhat.com>
 780
 781         * include/bits/fs_path.h (__detail::__is_contiguous): New
 782         variable template to identify contiguous iterators.
 783         (__detail::__unified_char8_t): New alias template to decide when
 784         to treat char8_t as char without encoding conversion.
 785         (__detail::__effective_range(const basic_string<C,T>&)): Use
 786         std::char_traits<C> for returned string view.
 787         (__detail::__effective_range(const basic_string_view<C,T>&)):
 788         Likewise.
 789         (__detail::__effective_range(const Source&)): Use
 790         __is_contiguous to detect mode cases of contiguous iterators.
 791         Use __unified_char8_t to return a std::string instead of
 792         std::u8string.
 793
 794 2021-10-13  Jonathan Wakely  <jwakely@redhat.com>
 795
 796         PR libstdc++/102592
 797         * include/bits/fs_path.h (path::path(Iter, Iter, format))
 798         (path::append(Iter, Iter), path::concat(Iter, Iter)): Call
 799         __string_from_range directly, instead of two-argument overload
 800         of _S_convert.
 801         (path::_S_convert(Iter, Iter)): Remove.
 802         * testsuite/27_io/filesystem/path/construct/102592.C: New test.
 803
 804 2021-10-13  Jonathan Wakely  <jwakely@redhat.com>
 805
 806         * include/bits/c++config (__terminate): Add extern "C++".
 807
 808 2021-10-12  Jonathan Wakely  <jwakely@redhat.com>
 809
 810         * testsuite/20_util/tuple/comparison_operators/overloaded.cc:
 811         Restore test for operator<.
 812         * testsuite/20_util/tuple/comparison_operators/overloaded2.cc:
 813         Adjust expected errors for C++20.
 814
 815 2021-10-12  Jonathan Wakely  <jwakely@redhat.com>
 816
 817         PR libstdc++/101960
 818         * include/std/tuple (_Tuple_impl(_Tuple_impl&&)): Define as
 819         defauled.
 820         * testsuite/20_util/tuple/cons/101960.cc: Check tuples with
 821         array elements before the last element.
 822
 823 2021-10-12  Jonathan Wakely  <jwakely@redhat.com>
 824
 825         * include/bits/stl_iterator_base_funcs.h (__advance): Add
 826         deleted overload to improve diagnostics.
 827         (__distance): Likewise.
 828
 829 2021-10-11  Jonathan Wakely  <jwakely@redhat.com>
 830
 831         * include/bits/atomic_timed_wait.h: Remove unused header.
 832         * include/bits/c++config (std:__terminate): Define.
 833         * include/bits/semaphore_base.h: Remove <exception> and use
 834         __terminate instead of terminate.
 835         * include/bits/std_thread.h: Likewise.
 836         * libsupc++/eh_terminate.cc (std::terminate): Use qualified-id
 837         to call __cxxabiv1::__terminate.
 838
 839 2021-10-11  Jonathan Wakely  <jwakely@redhat.com>
 840
 841         * include/bits/regex.h (basic_regex::assign(Iter, Iter)): Avoid
 842         std::__to_address by using poitner directly or using base()
 843         member of __normal_iterator.
 844
 845 2021-10-11  Jonathan Wakely  <jwakely@redhat.com>
 846
 847         * testsuite/18_support/numeric_limits/lowest.cc: Use
 848         numeric_limits<T>::is_integer instead of is_integral<T>::value.
 849
 850 2021-10-11  Jonathan Wakely  <jwakely@redhat.com>
 851
 852         PR libstdc++/89927
 853         * include/bits/regex.h (basic_regex(const _Ch_type*, size_t)):
 854         Add __glibcxx_requires_string_len assertion.
 855         (basic_regex::assign(InputIterator, InputIterator)): Add
 856         __glibcxx_requires_valid_range assertion.
 857         * include/bits/regex_scanner.tcc (_Scanner::_M_advance())
 858         (_Scanner::_M_scan_normal()): Use string literal in assertions.
 859
 860 2021-10-11  Jonathan Wakely  <jwakely@redhat.com>
 861
 862         PR libstdc++/102667
 863         * include/bits/regex.h (match_result::empty()): Optimize by
 864         calling the base function directly.
 865         (match_results::end()): Check _Base_type::empty() not empty().
 866         * testsuite/28_regex/match_results/102667.C: New test.
 867
 868 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
 869
 870         PR libstdc++/98725
 871         * testsuite/18_support/numeric_limits/lowest.cc: Remove use of
 872         _GLIBCXX_USE_WCHAR_T.
 873         * testsuite/18_support/numeric_limits/min_max.cc: Replace use of
 874         _GLIBCXX_USE_WCHAR_T with checks for WCHAR_MIN and WCHAR_MAX.
 875         * testsuite/20_util/from_chars/1_neg.cc: Remove use of
 876         _GLIBCXX_USE_WCHAR_T.
 877         * testsuite/20_util/function_objects/searchers.cc: Likewise. Use
 878         char_traits<wchar_t>::length instead of wcslen.
 879         * testsuite/20_util/hash/requirements/explicit_instantiation.cc:
 880         Likewise.
 881         * testsuite/20_util/is_arithmetic/value.cc: Likewise.
 882         * testsuite/20_util/is_compound/value.cc: Likewise.
 883         * testsuite/20_util/is_floating_point/value.cc: Likewise.
 884         * testsuite/20_util/is_fundamental/value.cc: Likewise.
 885         * testsuite/20_util/is_integral/value.cc: Likewise.
 886         * testsuite/20_util/is_signed/value.cc: Likewise.
 887         * testsuite/20_util/is_unsigned/value.cc: Likewise.
 888         * testsuite/20_util/is_void/value.cc: Likewise.
 889         * testsuite/20_util/make_signed/requirements/typedefs-1.cc:
 890         Likewise.
 891         * testsuite/20_util/make_signed/requirements/typedefs-2.cc:
 892         Likewise.
 893         * testsuite/20_util/make_signed/requirements/typedefs-3.cc:
 894         Likewise.
 895         * testsuite/20_util/make_signed/requirements/typedefs-4.cc:
 896         Likewise.
 897         * testsuite/20_util/make_unsigned/requirements/typedefs-1.cc:
 898         Likewise.
 899         * testsuite/20_util/make_unsigned/requirements/typedefs-2.cc:
 900         Likewise.
 901         * testsuite/20_util/make_unsigned/requirements/typedefs-3.cc:
 902         Likewise.
 903         * testsuite/20_util/to_chars/3.cc: Likewise.
 904         * testsuite/20_util/type_identity/requirements/typedefs.cc:
 905         Likewise.
 906         * testsuite/21_strings/basic_string/hash/debug.cc: Likewise.
 907         * testsuite/21_strings/basic_string/hash/hash.cc: Likewise.
 908         * testsuite/21_strings/basic_string/literals/types-char8_t.cc:
 909         Likewise.
 910         * testsuite/21_strings/basic_string/literals/types.cc: Likewise.
 911         * testsuite/21_strings/basic_string/literals/values-char8_t.cc:
 912         Likewise.
 913         * testsuite/21_strings/basic_string/literals/values.cc:
 914         Likewise.
 915         * testsuite/21_strings/basic_string/modifiers/64422.cc:
 916         Likewise.
 917         * testsuite/21_strings/basic_string/range_access/wchar_t/1.cc:
 918         Likewise.
 919         * testsuite/21_strings/basic_string/requirements/citerators.cc:
 920         Likewise.
 921         * testsuite/21_strings/basic_string/requirements/typedefs.cc:
 922         Likewise.
 923         * testsuite/21_strings/basic_string/types/pmr_typedefs.cc:
 924         Likewise.
 925         * testsuite/21_strings/basic_string_view/literals/types-char8_t.cc:
 926         Likewise.
 927         * testsuite/21_strings/basic_string_view/literals/types.cc:
 928         Likewise.
 929         * testsuite/21_strings/basic_string_view/literals/values-char8_t.cc:
 930         Likewise.
 931         * testsuite/21_strings/basic_string_view/literals/values.cc:
 932         Likewise.
 933         * testsuite/21_strings/basic_string_view/requirements/typedefs.cc:
 934         Likewise.
 935         * testsuite/21_strings/basic_string_view/typedefs.cc: Likewise.
 936         * testsuite/21_strings/char_traits/requirements/constexpr_functions.cc:
 937         Likewise.
 938         * testsuite/21_strings/char_traits/requirements/constexpr_functions_c++17.cc:
 939         Likewise.
 940         * testsuite/21_strings/char_traits/requirements/constexpr_functions_c++20.cc:
 941         Likewise.
 942         * testsuite/22_locale/ctype/is/string/89728_neg.cc: Likewise.
 943         * testsuite/25_algorithms/fill/4.cc: Likewise.
 944         * testsuite/25_algorithms/fill_n/1.cc: Likewise.
 945         * testsuite/experimental/functional/searchers.cc: Likewise. Use
 946         char_traits<wchar_t>::length instead of wcslen.
 947         * testsuite/experimental/polymorphic_allocator/pmr_typedefs_string.cc:
 948         Likewise.
 949         * testsuite/experimental/string_view/literals/types-char8_t.cc:
 950         Likewise.
 951         * testsuite/experimental/string_view/literals/types.cc:
 952         Likewise.
 953         * testsuite/experimental/string_view/literals/values-char8_t.cc:
 954         Likewise.
 955         * testsuite/experimental/string_view/literals/values.cc:
 956         Likewise.
 957         * testsuite/experimental/string_view/range_access/wchar_t/1.cc:
 958         Likewise.
 959         * testsuite/experimental/string_view/requirements/typedefs.cc:
 960         Likewise.
 961         * testsuite/experimental/string_view/typedefs.cc: Likewise.
 962         * testsuite/ext/vstring/range_access.cc: Likewise.
 963         * testsuite/std/concepts/concepts.lang/concept.arithmetic/integral.cc:
 964         Likewise.
 965         * testsuite/std/concepts/concepts.lang/concept.arithmetic/signed_integral.cc:
 966         Likewise.
 967         * testsuite/std/concepts/concepts.lang/concept.arithmetic/unsigned_integral.cc:
 968         Likewise.
 969         * testsuite/tr1/4_metaprogramming/is_arithmetic/value.cc:
 970         Likewise.
 971         * testsuite/tr1/4_metaprogramming/is_compound/value.cc:
 972         Likewise.
 973         * testsuite/tr1/4_metaprogramming/is_floating_point/value.cc:
 974         Likewise.
 975         * testsuite/tr1/4_metaprogramming/is_fundamental/value.cc:
 976         Likewise.
 977         * testsuite/tr1/4_metaprogramming/is_integral/value.cc:
 978         Likewise.
 979         * testsuite/tr1/4_metaprogramming/is_signed/value.cc: Likewise.
 980         * testsuite/tr1/4_metaprogramming/is_unsigned/value.cc:
 981         Likewise.
 982         * testsuite/tr1/4_metaprogramming/is_void/value.cc: Likewise.
 983         * testsuite/tr1/6_containers/hash/24799.cc: Likewise.
 984
 985 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
 986
 987         PR libstdc++/98725
 988         * include/std/ostream (operator<<(basic_ostream<char, Tr>&, wchar_t))
 989         (operator<<(basic_ostream<char, Tr>&, const wchar_t*)): Always
 990         define as deleted. Do not check _GLIBCXX_USE_WCHAR_T.
 991
 992 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
 993
 994         PR libstdc++/98725
 995         * include/bits/locale_conv.h (wstring_convert, wbuffer_convert):
 996         Define unconditionally. Do not check _GLIBCXX_USE_WCHAR_T.
 997
 998 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
 999
1000         PR libstdc++/98725
1001         * include/c_global/cstddef [!_GLIBCXX_USE_WCHAR_T]
1002         (__byte_operand<wchar_t>): Define specialization.
1003         * include/std/type_traits (__make_signed<wchar_t>)
1004         (__make_unsigned<wchar_t>): Remove redundant check for
1005         __WCHAR_TYPE__ being defined.
1006         * include/tr1/type_traits [!_GLIBCXX_USE_WCHAR_T]
1007         (__is_integral_helper<wchar_t>): Likewise.
1008
1009 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
1010
1011         PR libstdc++/98725
1012         * include/ext/rc_string_base.h [!_GLIBCXX_USE_WCHAR_T]
1013         (__rc_string_base<wchar_t>): Define member function.
1014         * include/ext/vstring.h [!_GLIBCXX_USE_WCHAR_T]
1015         (hash<__gnu_cxx::__wvstring>): Define specialization.
1016         * include/ext/vstring_fwd.h [!_GLIBCXX_USE_WCHAR_T] (__wvstring)
1017         (__wsso_string, __wrc_string): Declare typedefs.
1018
1019 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
1020
1021         PR libstdc++/98725
1022         * include/bits/char_traits.h (char_traits<wchar_t>): Define
1023         explicit specialization unconditionally.
1024         * include/bits/basic_string.h (hash<wstring>): Define
1025         unconditionally. Do not check _GLIBCXX_USE_WCHAR_T.
1026         * include/bits/stringfwd.h (wstring): Likewise.
1027         * include/debug/string (wstring): Likewise.
1028         * include/experimental/string_view (experimental::wstring_view)
1029         (hash<experimental::wstring_view>): Likewise.
1030         * include/std/string (pmr::wstring, hash<pmr::wstring>):
1031         Likewise.
1032         * include/std/string_view (wstring_view, hash<wstring_view>):
1033         Likewise.
1034
1035 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
1036
1037         * testsuite/27_io/basic_filebuf/close/81256.cc: Moved to...
1038         * testsuite/27_io/basic_filebuf/close/wchar_t/81256.cc: ...here.
1039
1040 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
1041
1042         * testsuite/22_locale/conversions/buffer/1.cc: Check
1043         _GLIBCXX_USE_WCHAR_T.
1044         * testsuite/22_locale/conversions/buffer/3.cc: Likewise. Add
1045         test using char16_t.
1046         * testsuite/22_locale/conversions/string/1.cc: Check
1047         _GLIBCXX_USE_WCHAR_T.
1048         * testsuite/27_io/filesystem/path/generic/generic_string.cc:
1049         Likewise.
1050         * testsuite/27_io/filesystem/path/modifiers/make_preferred.cc:
1051         Likewise.
1052         * testsuite/27_io/filesystem/path/native/alloc.cc: Likewise.
1053         * testsuite/27_io/filesystem/path/native/string-char8_t.cc:
1054         Likewise.
1055         * testsuite/27_io/filesystem/path/native/string.cc: Likewise.
1056         * testsuite/28_regex/algorithms/regex_match/extended/wstring_locale.cc:
1057         Likewise.
1058         * testsuite/experimental/filesystem/path/generic/generic_string.cc:
1059         Likewise.
1060         * testsuite/experimental/filesystem/path/native/alloc.cc:
1061         Likewise.
1062         * testsuite/experimental/filesystem/path/native/string-char8_t.cc:
1063         Likewise.
1064         * testsuite/experimental/filesystem/path/native/string.cc:
1065         Likewise.
1066
1067 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
1068
1069         * testsuite/26_numerics/bit/bit.rotate/rotr.cc:
1070         * testsuite/util/testsuite_common_types.h:
1071
1072 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
1073
1074         * testsuite/18_support/numeric_limits/40856.cc: Replace use of
1075         _GLIBCXX_USE_INT128.
1076         * testsuite/18_support/numeric_limits/dr559.cc: Likewise.
1077         * testsuite/18_support/numeric_limits/lowest.cc: Likewise.
1078         * testsuite/18_support/numeric_limits/max_digits10.cc: Likewise.
1079         * testsuite/20_util/is_floating_point/value.cc: Likewise.
1080         * testsuite/20_util/is_integral/value.cc: Likewise.
1081         * testsuite/20_util/is_signed/value.cc: Likewise.
1082         * testsuite/20_util/is_unsigned/value.cc: Likewise.
1083         * testsuite/20_util/make_signed/requirements/typedefs-1.cc:
1084         Likewise.
1085         * testsuite/20_util/make_signed/requirements/typedefs-2.cc:
1086         Likewise.
1087         * testsuite/20_util/make_unsigned/requirements/typedefs-1.cc:
1088         Likewise.
1089         * testsuite/20_util/make_unsigned/requirements/typedefs-2.cc:
1090         Likewise.
1091         * testsuite/20_util/type_identity/requirements/typedefs.cc:
1092         Likewise.
1093         * testsuite/26_numerics/bit/bit.count/countl_one.cc: Likewise.
1094         * testsuite/26_numerics/bit/bit.count/countl_zero.cc: Likewise.
1095         * testsuite/26_numerics/bit/bit.count/countr_one.cc: Likewise.
1096         * testsuite/26_numerics/bit/bit.count/countr_zero.cc: Likewise.
1097         * testsuite/26_numerics/bit/bit.count/popcount.cc: Likewise.
1098         * testsuite/26_numerics/bit/bit.pow.two/bit_ceil.cc: Likewise.
1099         * testsuite/26_numerics/bit/bit.pow.two/bit_floor.cc: Likewise.
1100         * testsuite/26_numerics/bit/bit.pow.two/bit_width.cc: Likewise.
1101         * testsuite/26_numerics/bit/bit.pow.two/has_single_bit.cc:
1102         Likewise.
1103         * testsuite/26_numerics/bit/bit.rotate/rotl.cc: Likewise.
1104
1105 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
1106
1107         * include/bits/hashtable_policy.h (_Select1st): Replace use of
1108         std::get.
1109         (_Select2nd): Remove.
1110         (_NodeBuilder::_S_build): Use _NodeGenerator::__node_type
1111         typedef instead of deducing it. Remove unnecessary piecewise
1112         construction.
1113         (_ReuseOrAllocNode): Make __node_type public.
1114         (_Map_base): Adjust partial specialization to be able to extract
1115         the mapped_type without using tuple_element.
1116         (_Map_base::at): Define inline
1117         * testsuite/23_containers/unordered_map/requirements/53339.cc:
1118         Remove XFAIL.
1119         * testsuite/23_containers/unordered_multimap/requirements/53339.cc:
1120         Likewise.
1121
1122 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
1123
1124         * include/bits/hashtable.h: Move static assertion to destructor.
1125         * include/bits/hashtable_policy.h: Deduce value type from node
1126         type without instantiating it.
1127
1128 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
1129
1130         * src/c++11/limits.cc: Fail if __cpp_inline_variables is
1131         defined.
1132
1133 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
1134
1135         PR libstdc++/92546
1136         * include/bits/ranges_algobase.h: Replace <iterator> with a
1137         subset of the headers it includes.
1138
1139 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
1140
1141         * include/experimental/deque (erase, erase_if): Revert changes
1142         to avoid debug mode overhead.
1143         * include/experimental/map (erase, erase_if): Likewise.
1144         * include/experimental/set (erase, erase_if): Likewise.
1145         * include/experimental/unordered_map (erase, erase_if):
1146         Likewise.
1147         * include/experimental/unordered_set (erase, erase_if):
1148         Likewise.
1149         * include/experimental/vector (erase, erase_if): Likewise.
1150         * include/std/deque (erase, erase_if): Likewise.
1151         * include/std/map (erase, erase_if): Likewise.
1152         * include/std/set (erase, erase_if): Likewise.
1153         * include/std/unordered_map (erase, erase_if): Likewise.
1154         * include/std/unordered_set (erase, erase_if): Likewise.
1155         * include/std/vector (erase, erase_if): Likewise.
1156
1157 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
1158
1159         * include/std/chrono (__detail::__units_suffix_misc): New
1160         helper function.
1161         (__detail::__units_suffix): Likewise.
1162         (chrono::operator<<(basic_ostream&, const duration&)): Define.
1163         * testsuite/20_util/duration/io.cc: New test.
1164
1165 2021-10-07  Jonathan Wakely  <jwakely@redhat.com>
1166
1167         * include/Makefile.am: Add new header.
1168         * include/Makefile.in: Regenerate.
1169         * include/std/chrono (duration, time_point, system_clock)
1170         (steady_clock, high_resolution_clock, chrono_literals, sys_time)
1171         (file_clock, file_time): Move to ...
1172         * include/bits/chrono.h: New file.
1173         * include/bits/atomic_futex.h: Include new header instead of
1174         <chrono>.
1175         * include/bits/atomic_timed_wait.h: Likewise.
1176         * include/bits/fs_fwd.h: Likewise.
1177         * include/bits/semaphore_base.h: Likewise.
1178         * include/bits/this_thread_sleep.h: Likewise.
1179         * include/bits/unique_lock.h: Likewise.
1180         * include/experimental/bits/fs_fwd.h: Likewise.
1181         * include/experimental/chrono: Likewise.
1182         * include/experimental/io_context: Likewise.
1183         * include/experimental/netfwd: Likewise.
1184         * include/experimental/timer: Likewise.
1185         * include/std/condition_variable: Likewise.
1186         * include/std/mutex: Likewise.
1187         * include/std/shared_mutex: Likewise.
1188
1189 2021-10-07  Jonathan Wakely  <jwakely@redhat.com>
1190
1191         PR libstdc++/102377
1192         * include/bits/atomic_wait.h (__waiter_pool_base:_S_align):
1193         Hardcode to 64 instead of using non-constant constant.
1194
1195 2021-10-07  Jonathan Wakely  <jwakely@redhat.com>
1196
1197         * include/bits/erase_if.h (__erase_nodes_if): Remove redundant
1198         __niter_base calls.
1199         * include/std/string (erase, erase_if): Likewise.
1200         * include/std/deque (erase, erase_if): Access non-debug
1201         container directly.
1202         * include/std/map (erase, erase_if): Likewise.
1203         * include/std/set (erase, erase_if): Likewise.
1204         * include/std/unordered_map (erase, erase_if): Likewise.
1205         * include/std/unordered_set (erase, erase_if): Likewise.
1206         * include/std/vector (erase, erase_if): Likewise.
1207         * include/experimental/deque (erase, erase_if): Likewise.
1208         * include/experimental/map (erase, erase_if): Likewise.
1209         * include/experimental/set (erase, erase_if): Likewise.
1210         * include/experimental/unordered_map (erase, erase_if):
1211         Likewise.
1212         * include/experimental/unordered_set (erase, erase_if):
1213         Likewise.
1214         * include/experimental/vector (erase, erase_if): Likewise.
1215
1216 2021-10-06  Jonathan Wakely  <jwakely@redhat.com>
1217
1218         * include/Makefile.am: Add new headers.
1219         * include/Makefile.in: Regenerate.
1220         * include/std/functional: Include <bits/move_only_function.h>.
1221         * include/std/version (__cpp_lib_move_only_function): Define.
1222         * include/bits/mofunc_impl.h: New file.
1223         * include/bits/move_only_function.h: New file.
1224         * testsuite/20_util/move_only_function/call.cc: New test.
1225         * testsuite/20_util/move_only_function/cons.cc: New test.
1226         * testsuite/20_util/move_only_function/move.cc: New test.
1227         * testsuite/20_util/move_only_function/version.cc: New test.
1228
1229 2021-10-05  Jonathan Wakely  <jwakely@redhat.com>
1230
1231         * testsuite/21_strings/basic_string_view/requirements/trivially_copyable.cc:
1232         New test.
1233         * testsuite/23_containers/span/trivially_copyable.cc: New test.
1234
1235 2021-10-05  Jonathan Wakely  <jwakely@redhat.com>
1236
1237         * include/bits/utility.h (__is_in_place_type_v): Define
1238         variable template to detect in_place_type_t specializations.
1239         (__is_in_place_type): Replace class template with alias
1240         template using __is_in_place_type_v.
1241         * include/std/any (any(T&&)): Check __is_in_place_type first and
1242         avoid instantiating is_copy_constructible unnecessarily.
1243
1244 2021-10-05  Jonathan Wakely  <jwakely@redhat.com>
1245
1246         * testsuite/20_util/integer_comparisons/greater.cc: New test.
1247
1248 2021-10-05  Jonathan Wakely  <jwakely@redhat.com>
1249
1250         * testsuite/27_io/basic_ostream/inserters_other/char/volatile_ptr.cc:
1251         Check result matches non-volatile pointer.
1252
1253 2021-10-05  Jonathan Wakely  <jwakely@redhat.com>
1254
1255         PR c++/102535
1256         * testsuite/20_util/is_trivially_constructible/value.cc: Adjust
1257         expected value for C++20.
1258
1259 2021-10-05  Jonathan Wakely  <jwakely@redhat.com>
1260
1261         * include/bits/std_function.h (_Any_data::_M_access): Add
1262         noexcept.
1263         (_Function_base::_Base_manager::_M_get_pointer): Likewise.
1264         (_Function_base::_Base_manager::_M_not_empty_function):
1265         Likewise.
1266
1267 2021-10-05  Jonathan Wakely  <jwakely@redhat.com>
1268
1269         * include/std/ostream (operator<<(const volatile void*)):
1270         Add new overload, as per P1147R1.
1271         * testsuite/27_io/basic_ostream/inserters_other/char/volatile_ptr.cc:
1272         New test.
1273
1274 2021-10-05  Jonathan Wakely  <jwakely@redhat.com>
1275
1276         * include/bits/stl_queue.h
1277         (__cpp_lib_adaptor_iterator_pair_constructor): Set to correct
1278         value.
1279         * include/bits/stl_stack.h
1280         (__cpp_lib_adaptor_iterator_pair_constructor): Likewise.
1281         * include/std/version
1282         (__cpp_lib_adaptor_iterator_pair_constructor): Likewise.
1283         * testsuite/23_containers/queue/cons_from_iters.cc: Update
1284         expected value.
1285         * testsuite/23_containers/stack/cons_from_iters.cc: Likewise.
1286
1287 2021-10-04  Jonathan Wakely  <jwakely@redhat.com>
1288
1289         * include/bits/forward_list.h (forward_list): Use non-deduced
1290         context for allocator parameter of allocator-extended copy and
1291         move constructors.
1292         * include/bits/stl_bvector.h (vector<bool>): Likewise.
1293         * include/bits/stl_deque.h (deque): Likewise.
1294         * include/bits/stl_list.h (list): Likewise.
1295         * include/bits/stl_map.h (map): Likewise.
1296         * include/bits/stl_multimap.h (multimap): Likewise.
1297         * include/bits/stl_multiset.h (multiset): Likewise.
1298         * include/bits/stl_set.h (set): Likewise.
1299         * include/bits/stl_vector.h (vector): Likewise.
1300         * include/bits/stl_queue.h (queue, priority_queue): Do not
1301         constrain Allocator template parameter of deduction guides that
1302         have a Container parameter.
1303         * include/bits/stl_stack.h (stack): Likewise.
1304         * include/debug/deque (__gnu_debug::deque): Use non-deduced
1305         context for allocator parameter of allocator-extended copy and
1306         move constructors.
1307         * include/debug/list (__gnu_debug::list): Likewise.
1308         * include/debug/map.h (__gnu_debug::map): Likewise.
1309         * include/debug/multimap.h (__gnu_debug::multimap): Likewise.
1310         * include/debug/multiset.h (__gnu_debug::multiset): Likewise.
1311         * include/debug/set.h (__gnu_debug::set): Likewise.
1312         * include/debug/vector (__gnu_debug::vector): Likewise.
1313         * testsuite/23_containers/deque/cons/deduction.cc: Test class
1314         template argument deduction with non-deduced allocator
1315         arguments.
1316         * testsuite/23_containers/forward_list/cons/deduction.cc:
1317         Likewise.
1318         * testsuite/23_containers/list/cons/deduction.cc: Likewise.
1319         * testsuite/23_containers/map/cons/deduction.cc: Likewise.
1320         * testsuite/23_containers/multimap/cons/deduction.cc: Likewise.
1321         * testsuite/23_containers/multiset/cons/deduction.cc: Likewise.
1322         * testsuite/23_containers/priority_queue/deduction.cc: Likewise.
1323         * testsuite/23_containers/queue/deduction.cc: Likewise.
1324         * testsuite/23_containers/set/cons/deduction.cc: Likewise.
1325         * testsuite/23_containers/stack/deduction.cc: Likewise.
1326         * testsuite/23_containers/unordered_map/cons/deduction.cc:
1327         Likewise.
1328         * testsuite/23_containers/unordered_multimap/cons/deduction.cc:
1329         Likewise.
1330         * testsuite/23_containers/unordered_multiset/cons/deduction.cc:
1331         Likewise.
1332         * testsuite/23_containers/unordered_set/cons/deduction.cc:
1333         Likewise.
1334         * testsuite/23_containers/vector/cons/deduction.cc: Likewise.
1335
1336 2021-10-04  Jonathan Wakely  <jwakely@redhat.com>
1337
1338         * include/std/variant (__detail::__variant::__as): Add missing
1339         noexcept to first overload.
1340
1341 2021-10-04  Jonathan Wakely  <jwakely@redhat.com>
1342
1343         * include/bits/basic_string.h (basic_string(nullptr_t)): Define
1344         as deleted.
1345         (operator=(nullptr_t)): Likewise.
1346         * include/bits/cow_string.h (basic_string(nullptr_t)): Likewise.
1347         (operator=(nullptr_t)): Likewise.
1348         * include/std/string_view (basic_string_view(nullptr_t)):
1349         Likewise.
1350         * testsuite/21_strings/basic_string/cons/char/nullptr.cc: New test.
1351         * testsuite/21_strings/basic_string_view/cons/char/nonnull.cc:
1352         Change dg-warning to dg-error.
1353         * testsuite/21_strings/basic_string_view/cons/wchar_t/nonnull.cc:
1354         Likewise.
1355
1356 2021-10-02  Jonathan Wakely  <jwakely@redhat.com>
1357
1358         * src/c++17/fs_ops.cc (create_directory): Fix typo in enum name.
1359         * src/filesystem/ops-common.h (__last_system_error): Add
1360         explicit cast to avoid narrowing conversion.
1361         (do_space): Fix type in function name.
1362
1363 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1364
1365         PR libstdc++/102100
1366         * include/Makefile.am (c++config.h): Define
1367         _GLIBCXX_VERBOSE_ASSERT based on configure output.
1368         * include/Makefile.in: Regenerate.
1369         * include/bits/c++config: Fix condition for verbose assertions.
1370
1371 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1372
1373         PR libstdc++/92546
1374         * include/bits/erase_if.h (__erase_nodes_if): Use __niter_base to
1375         unwrap debug iterators.
1376         * include/bits/refwrap.h: Do not error if included in C++03.
1377         * include/bits/stl_algo.h (__remove_if): Move to ...
1378         * include/bits/stl_algobase.h (__remove_if): ... here.
1379         * include/std/deque (erase, erase_if): Use __remove_if instead of
1380         remove and remove_if.
1381         * include/std/string (erase, erase_if): Likewise.
1382         * include/std/vector (erase, erase_if): Likewise.
1383
1384 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1385
1386         PR libstdc++/66742
1387         * include/bits/list.tcc (list::sort()): Use _Scratch_list
1388         objects for splicing and merging.
1389         (list::sort(StrictWeakOrdering)): Likewise.
1390         * include/bits/stl_list.h (__detail::_Scratch_list): New type.
1391         * src/c++98/list.cc (_List_node_base::_M_transfer): Add
1392         assertion for --enable-libstdcxx-debug library.
1393         * testsuite/23_containers/list/operations/66742.cc: New test.
1394
1395 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1396
1397         PR libstdc++/100612
1398         * include/std/thread (__pmf_expects_stop_token): New variable
1399         template to detect a pointer to member function that needs a
1400         stop_token to be added to the arguments.
1401         (jthread::__S_create): Use __pmf_expects_stop_token.
1402         (jthread::__S_create_pmf): New function.
1403         * testsuite/30_threads/jthread/100612.cc: New test.
1404
1405 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1406
1407         * include/bits/stl_queue.h
1408         (__cpp_lib_adaptor_iterator_pair_constructor): Define for C++23, as
1409         per P1425R4.
1410         (queue(InputIterator, InputIterator)): Likewise.
1411         (queue(InputIterator, InputIterator, const Alloc&)): Likewise.
1412         * include/bits/stl_stack.h
1413         (__cpp_lib_adaptor_iterator_pair_constructor): Likewise.
1414         (stack(InputIterator, InputIterator)): Likewise.
1415         (stack(InputIterator, InputIterator, const Alloc&)): Likewise.
1416         * include/std/version (__cpp_lib_adaptor_iterator_pair_constructor):
1417         Define.
1418         * testsuite/23_containers/queue/cons_from_iters.cc: New test.
1419         * testsuite/23_containers/stack/cons_from_iters.cc: New test.
1420
1421 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1422
1423         * include/bits/stl_queue.h (priority_queue): Add
1424         allocator-extended overloads for constructors taking iterator.
1425         * testsuite/23_containers/priority_queue/lwg3506.cc: New test.
1426
1427 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1428
1429         * include/bits/stl_queue.h (priority_queue): Construct sequence
1430         from iterators when no sequence argument is present (LWG 3529).
1431         * testsuite/23_containers/priority_queue/lwg3529.cc: New test.
1432
1433 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1434
1435         * include/bits/stl_queue.h (priority_queue): Constrain
1436         constructors with InputIterator parameters (LWG 3522).
1437         * testsuite/23_containers/priority_queue/lwg3522.cc: New test.
1438
1439 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1440
1441         * include/bits/ranges_base.h (ranges::distance): Split overload
1442         into two (LWG 3392).
1443         * testsuite/24_iterators/range_operations/lwg3392.cc: New test.
1444
1445 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1446
1447         * testsuite/30_threads/thread/cons/3.cc: Remove derivation from
1448         std::unary_function.
1449         * testsuite/30_threads/thread/cons/4.cc: Likewise.
1450         * testsuite/30_threads/thread/cons/5.cc: Likewise.
1451
1452 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1453
1454         * testsuite/ext/pb_ds/example/basic_multimap.cc: Remove
1455         unnecesary derivation from std::unary_function.
1456         * testsuite/ext/pb_ds/example/erase_if.cc: Likewise.
1457         * testsuite/ext/pb_ds/example/hash_illegal_resize.cc: Likewise.
1458         * testsuite/ext/pb_ds/example/hash_initial_size.cc: Likewise.
1459         * testsuite/ext/pb_ds/example/hash_load_set_change.cc: Likewise.
1460         * testsuite/ext/pb_ds/example/hash_mod.cc: Likewise.
1461         * testsuite/ext/pb_ds/example/hash_resize.cc: Likewise.
1462         * testsuite/ext/pb_ds/example/hash_shift_mask.cc: Likewise.
1463         * testsuite/ext/pb_ds/example/priority_queue_dijkstra.cc:
1464         Likewise.
1465         * testsuite/ext/pb_ds/example/ranged_hash.cc: Likewise.
1466         * testsuite/ext/pb_ds/example/store_hash.cc: Likewise.
1467
1468 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1469
1470         * src/c++11/functexcept.cc (__throw_out_of_range_fmt): Do not
1471         expand the format string for freestanding, or non-vebose, or if
1472         we're just going to abort anyway.
1473         * src/c++11/snprintf_lite.cc: Remove unused header and
1474         declaration.
1475
1476 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1477
1478         * include/std/variant (__do_visit): Use variant_npos instead of
1479         literal -1 that requires a narrowing conversion.
1480
1481 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1482
1483         PR libstdc++/99327
1484         * src/filesystem/ops-common.h (__unsupported): New function to
1485         return a suitable error code for missing functionality.
1486         (posix::off_t): New typedef.
1487         (posix::*): Set errno to ENOSYS instead of ENOTSUP for no-op
1488         fallback implementations.
1489         (do_copy_file): Replace uses of errc::not_supported.
1490         * src/c++17/fs_ops.cc (fs::copy, fs::copy_file, create_dir)
1491         (fs::create_directory, fs::create_directory_symlink)
1492         (fs::create_hard_link, fs::create_symlink, fs::current_path)
1493         (fs::equivalent, do_stat, fs::file_size, fs::hard_link_count)
1494         (fs::last_write_time, fs::permissions, fs::read_symlink):
1495         Replace uses of errc::not_supported.
1496         (fs::resize_file): Qualify off_t.
1497         * src/filesystem/ops.cc (fs::copy, fs::copy_file, create_dir)
1498         (fs::create_directory, fs::create_directory_symlink)
1499         (fs::create_hard_link, fs::create_symlink, fs::current_path)
1500         (fs::equivalent, do_stat, fs::file_size, fs::last_write_time)
1501         (fs::permissions, fs::read_symlink, fs::system_complete):
1502         Replace uses of errc::not_supported.
1503         (fs::resize_file): Qualify off_t and enable unconditionally.
1504         * testsuite/19_diagnostics/system_error/cons-1.cc: Likewise.
1505
1506 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1507
1508         * src/filesystem/ops-common.h (last_error): New helper function.
1509         (filesystem::do_space): Use last_error().
1510         * src/c++17/fs_ops.cc (fs::absolute, fs::create_hard_link)
1511         (fs::equivalent, fs::remove, fs::temp_directory_path): Use
1512         last_error().
1513         * src/filesystem/ops.cc (fs::create_hard_link)
1514         (fs::remove, fs::temp_directory_path): Likewise.
1515
1516 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1517
1518         * include/std/type_traits (__conditional): New class template
1519         for internal uses of std::conditional.
1520         (__conditional_t): New alias template to replace conditional_t.
1521         (__and_, __or_, __result_of_memfun, __result_of_memobj): Use
1522         __conditional_t instead of conditional::type.
1523         * include/bits/atomic_base.h (__atomic_impl::_Diff): Likewise.
1524         * include/bits/hashtable.h (_Hashtable): Likewise.
1525         * include/bits/hashtable_policy.h (_Node_iterator, _Insert_base)
1526         (_Local_iterator): Likewise. Replace typedefs with
1527         using-declarations.
1528         * include/bits/move.h (move_if_noexcept): Use __conditional_t.
1529         * include/bits/parse_numbers.h (_Select_int_base): Likewise.
1530         * include/bits/ptr_traits.h (__make_not_void): Likewise.
1531         * include/bits/ranges_algobase.h (__copy_or_move_backward)
1532         (__copy_or_move): Likewise.
1533         * include/bits/ranges_base.h (borrowed_iterator_t): Likewise.
1534         * include/bits/ranges_util.h (borrowed_subrange_t): Likewise.
1535         * include/bits/regex_compiler.h (_BracketMatcher): Use
1536         __conditional_t. Replace typedefs with using-declarations.
1537         * include/bits/shared_ptr_base.h (__shared_count): Use
1538         __conditional_t.
1539         * include/bits/stl_algobase.h (__copy_move, __copy_move_backward):
1540         Likewise.
1541         * include/bits/stl_iterator.h (__detail::__clamp_iter_cat)
1542         (reverse_iterator::iterator_concept)
1543         (__make_move_if_noexcept_iterator)
1544         (iterator_traits<common_iterator<_It, _Sent>>)
1545         (iterator_traits<counted_iterator<_It>>): Likewise.
1546         * include/bits/stl_pair.h (_PCC, pair::operator=): Likewise.
1547         * include/bits/stl_tree.h (_Rb_tree::insert_return_type)
1548         (_Rb_tree::_M_clone_node): Likewise.
1549         * include/bits/unique_ptr.h (unique_ptr(unique_ptr<U,E>&&)):
1550         Likewise.
1551         * include/bits/uses_allocator.h (__uses_alloc): Likewise.
1552         (__is_uses_allocator_predicate): Likewise.
1553         * include/debug/functions.h (__foreign_iterator_aux2): Likewise.
1554         * include/experimental/any (any::_Manager, __any_caster):
1555         Likewise.
1556         * include/experimental/executor (async_completion): Likewise.
1557         * include/experimental/functional (__boyer_moore_base_t):
1558         Likewise.
1559         * include/std/any (any::_Manager): Likewise.
1560         * include/std/functional (__boyer_moore_base_t): Likewise.
1561         * include/std/ranges (borrowed_iterator_t)
1562         (borrowed_subrange_t, __detail::__maybe_present_t)
1563         (__detail::__maybe_const_t, split_view): Likewise.
1564         * include/std/tuple (__empty_not_final, tuple::operator=):
1565         Likewise.
1566         * include/std/variant (__detail::__variant::__get_t): Likewise.
1567
1568 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1569
1570         PR libstdc++/78113
1571         * include/std/variant (__do_visit): Use a switch when we have a
1572         single variant with a small number of alternatives.
1573
1574 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1575
1576         PR libstdc++/90943
1577         * include/std/variant (__cpp_lib_variant): Update value.
1578         (__detail::__variant::__as): New helpers implementing the
1579         as-variant exposition-only function templates.
1580         (visit, visit<R>): Use __as to upcast the variant parameters.
1581         * include/std/version (__cpp_lib_variant): Update value.
1582         * testsuite/20_util/variant/visit_inherited.cc: New test.
1583
1584 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1585
1586         * include/bits/stl_iterator.h (__normal_iterator): Simplify
1587         converting constructor and do not require _Container::pointer.
1588
1589 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1590
1591         * include/bits/cow_string.h [_GLIBCXX_FULLY_DYNAMIC_STRING]
1592         (basic_string(basic_string&&)): Add noexcept and avoid
1593         allocation, by sharing rep with the rvalue string.
1594
1595 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1596
1597         * include/bits/stl_iterator.h (common_iterator::__arrow_proxy)
1598         (common_iterator::__postfix_proxy): Add noexcept.
1599
1600 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1601
1602         PR libstdc++/94418
1603         * include/bits/stl_iterator.h (reverse_iterator): Use
1604         conditional noexcept on constructors and assignment operators.
1605         * testsuite/24_iterators/reverse_iterator/noexcept.cc: New test.
1606
1607 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1608
1609         PR libstdc++/100153
1610         * include/bits/vector.tcc (vector<bool>::_M_shrink_to_fit()):
1611         When size() is zero just deallocate and reset.
1612
1613 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1614
1615         PR libstdc++/96733
1616         * include/bits/stl_algo.h (clamp): Use std::min and std::max.
1617
1618 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1619
1620         * include/bits/regex.h (basic_regex::multiline): Define for
1621         non-strict C++11 and C++14 modes.
1622         * include/bits/regex_constants.h (regex_constants::multiline):
1623         Add _GLIBCXX_RESOLVE_LIB_DEFECTS comment.
1624
1625 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1626
1627         * testsuite/25_algorithms/is_permutation/2.cc: Include <iterator>.
1628
1629 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1630
1631         * include/bits/stream_iterator.h (istream_iterator): Add
1632         noexcept to constructors and non-throwing member functions and
1633         friend functions.
1634         (ostream_iterator): Likewise.
1635
1636 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1637
1638         * include/bits/boost_concept_check.h (_Is_vector_bool_iterator):
1639         New trait to identify vector<bool> iterators, including debug
1640         ones.
1641         (_ForwardIteratorReferenceConcept): Add default template
1642         argument using _Is_vector_bool_iterator and use it in partial
1643         specialization for the vector<bool> cases.
1644         (_Mutable_ForwardIteratorReferenceConcept): Likewise.
1645         * testsuite/24_iterators/operations/prev_neg.cc: Adjust dg-error
1646         line number.
1647
1648 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1649
1650         * include/bits/list.tcc (list::merge): Remove call to size() and
1651         try-catch block. Use _Finalize_merge instead.
1652         * include/bits/stl_list.h (list::_Finalize_merge): New
1653         scope guard type to update _M_size members after a merge.
1654
1655 2021-09-30  Jonathan Wakely  <jwakely@redhat.com>
1656
1657         * include/bits/regex.h (basic_regex::multiline): Fix #if
1658         condition.
1659
1660 2021-09-29  Jonathan Wakely  <jwakely@redhat.com>
1661
1662         * include/bits/regex.h (basic_regex::multiline): Define constant
1663         for C++17.
1664         * include/bits/regex_constants.h (regex_constants::multiline):
1665         Define constant for C++17.
1666         (regex_constants::__multiline): Define duplicate constant for
1667         internal use in C++11 and C++14.
1668         * include/bits/regex_executor.h (_Executor::_M_match_multiline()):
1669         New member function.
1670         (_Executor::_M_is_line_terminator(_CharT)): New member function.
1671         (_Executor::_M_at_begin(), _Executor::_M_at_end()): Use new
1672         member functions to support multiline matches.
1673         * testsuite/28_regex/algorithms/regex_match/multiline.cc: New test.
1674
1675 2021-09-29  Jonathan Wakely  <jwakely@redhat.com>
1676
1677         * include/bits/regex_compiler.h (_Compiler::_S_validate): New
1678         function.
1679         * include/bits/regex_compiler.tcc (_Compiler::_Compiler): Use
1680         _S_validate to check flags.
1681         * include/bits/regex_error.h (_S_grammar): New error code for
1682         internal use.
1683         * testsuite/28_regex/basic_regex/ctors/grammar.cc: New test.
1684
1685 2021-09-29  Jonathan Wakely  <jwakely@redhat.com>
1686
1687         PR libstdc++/84110
1688         * include/bits/regex_error.h (regex_constants::_S_null): New
1689         error code for internal use.
1690         * include/bits/regex_scanner.tcc (_Scanner::_M_scan_normal()):
1691         Check for null character.
1692         * testsuite/28_regex/basic_regex/84110.cc: New test.
1693
1694 2021-09-29  Jonathan Wakely  <jwakely@redhat.com>
1695
1696         * include/bits/regex.h (__detail::__is_contiguous_iter): Move
1697         here from <bits/regex_compiler.h>.
1698         (basic_regex::_M_compile): New function to compile an NFA from
1699         a regular expression string.
1700         (basic_regex::basic_regex): Use _M_compile instead of delegating
1701         to other constructors.
1702         (basic_regex::operator=(const basic_regex&)): Define as
1703         defaulted.
1704         (basic_regex::operator=(initializer_list<C>)): Use _M_compile.
1705         (basic_regex::assign(const basic_regex&)): Use copy assignment.
1706         (basic_regex::assign(basic_regex&&)): Use move assignment.
1707         (basic_regex::assign(const C*, flag_type)): Use _M_compile
1708         instead of constructing a temporary string.
1709         (basic_regex::assign(const C*, size_t, flag_type)): Likewise.
1710         (basic_regex::assign(const basic_string<C,T,A>&, flag_type)):
1711         Use _M_compile instead of constructing a temporary basic_regex.
1712         (basic_regex::assign(InputIter, InputIter, flag_type)): Avoid
1713         constructing a temporary string for contiguous iterators of the
1714         right value type.
1715         * include/bits/regex_compiler.h (__is_contiguous_iter): Move to
1716         <bits/regex.h>.
1717         (__enable_if_contiguous_iter, __disable_if_contiguous_iter)
1718         (__compile_nfa): Remove.
1719         * testsuite/28_regex/basic_regex/assign/exception_safety.cc: New
1720         test.
1721         * testsuite/28_regex/basic_regex/ctors/char/other.cc: New test.
1722
1723 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
1724
1725         * include/bits/atomic_timed_wait.h (__platform_wait_until_impl):
1726         Return false for ETIMEDOUT and true otherwise.
1727
1728 2021-09-28  François Dumont  <fdumont@gcc.gnu.org>
1729
1730         * testsuite/20_util/default_delete/48631_neg.cc: Adapt dg-prune-output message
1731         to also match message with '__8' in it.
1732
1733 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
1734
1735         * include/bits/regex_automaton.h (_NFA_base::_SizeT): Remove.
1736         * include/bits/regex_compiler.h (_Compiler::_IterT): Remove.
1737         * include/bits/regex_compiler.tcc: Likewise.
1738         * include/bits/regex_scanner.h (_Scanner::_IterT): Remove.
1739         * include/bits/regex_scanner.tcc: Likewise.
1740
1741 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
1742
1743         * include/bits/regex_compiler.tcc: Add line break in empty while
1744         statement.
1745         * include/bits/regex_executor.tcc: Avoid unused parameter
1746         warning.
1747
1748 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
1749
1750         * include/bits/regex.h (basic_regex, swap): Add noexcept to
1751         non-throwing functions.
1752         * include/bits/regex_automaton.h (_State_base, _State)
1753         (_NFA_base): Likewise.
1754         * include/bits/regex_compiler.h (_Compiler): Likewise.
1755         * include/bits/regex_error.h (regex_error::code()): Likewise.
1756         * include/bits/regex_scanner.h (_Scanner): Likewise.
1757
1758 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
1759
1760         * include/bits/atomic_wait.h (_GLIBCXX_HAVE_PLATFORM_WAIT):
1761         Define before first attempt to check it.
1762
1763 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
1764
1765         * testsuite/23_containers/priority_queue/requirements/explicit_instantiation/1.cc:
1766         Do not check non-default constructible sequences when
1767         _GLIBCXX_CONCEPT_CHECKS is defined.
1768         * testsuite/23_containers/priority_queue/requirements/explicit_instantiation/1_c++98.cc:
1769         Likewise.
1770         * testsuite/23_containers/queue/requirements/explicit_instantiation/1.cc:
1771         Likewise.
1772         * testsuite/23_containers/queue/requirements/explicit_instantiation/1_c++98.cc:
1773         Likewise.
1774         * testsuite/23_containers/stack/requirements/explicit_instantiation/1.cc:
1775         Likewise.
1776         * testsuite/23_containers/stack/requirements/explicit_instantiation/1_c++98.cc:
1777         Likewise.
1778
1779 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
1780
1781         * testsuite/23_containers/deque/requirements/explicit_instantiation/3.cc:
1782         Do not test implicit allocator rebinding when _GLIBCXX_CONCEPT_CHECKS
1783         is defined.
1784         * testsuite/23_containers/forward_list/requirements/explicit_instantiation/3.cc:
1785         Likewise.
1786         * testsuite/23_containers/list/requirements/explicit_instantiation/3.cc:
1787         Likewise.
1788         * testsuite/23_containers/list/requirements/explicit_instantiation/5.cc:
1789         Likewise.
1790         * testsuite/23_containers/map/requirements/explicit_instantiation/3.cc:
1791         Likewise.
1792         * testsuite/23_containers/map/requirements/explicit_instantiation/5.cc:
1793         Likewise.
1794         * testsuite/23_containers/multimap/requirements/explicit_instantiation/3.cc:
1795         Likewise.
1796         * testsuite/23_containers/multimap/requirements/explicit_instantiation/5.cc:
1797         Likewise.
1798         * testsuite/23_containers/multiset/requirements/explicit_instantiation/3.cc:
1799         Likewise.
1800         * testsuite/23_containers/multiset/requirements/explicit_instantiation/5.cc:
1801         Likewise.
1802         * testsuite/23_containers/set/requirements/explicit_instantiation/3.cc:
1803         Likewise.
1804         * testsuite/23_containers/set/requirements/explicit_instantiation/5.cc:
1805         Likewise.
1806         * testsuite/23_containers/unordered_map/requirements/explicit_instantiation/3.cc:
1807         Likewise.
1808         * testsuite/23_containers/unordered_multimap/requirements/explicit_instantiation/3.cc:
1809         Likewise.
1810         * testsuite/23_containers/unordered_multiset/requirements/explicit_instantiation/3.cc:
1811         Likewise.
1812         * testsuite/23_containers/unordered_set/requirements/explicit_instantiation/3.cc:
1813         Likewise.
1814         * testsuite/23_containers/vector/ext_pointer/explicit_instantiation/3.cc:
1815         Likewise.
1816         * testsuite/23_containers/vector/requirements/explicit_instantiation/3.cc:
1817         Likewise.
1818
1819 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
1820
1821         * include/bits/boost_concept_check.h (_ForwardIteratorConcept)
1822         (_BidirectionalIteratorConcept, _RandomAccessIteratorConcept):
1823         Check result types of iterator operations.
1824         (_Mutable_ForwardIteratorConcept): Check that iterator's
1825         reference type is a reference to its value type.
1826         (_Mutable_BidirectionalIteratorConcept): Do not require the
1827         value type to be assignable.
1828         (_Mutable_RandomAccessIteratorConcept): Likewise.
1829         * testsuite/24_iterators/operations/prev_neg.cc: Adjust dg-error
1830         line number.
1831
1832 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
1833
1834         * testsuite/25_algorithms/copy/34595.cc: Add missing operation
1835         for type used as an iterator.
1836         * testsuite/25_algorithms/unique_copy/check_type.cc: Likewise.
1837
1838 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
1839
1840         * testsuite/20_util/is_nothrow_swappable/value.h: Use custom
1841         comparison function for priority_queue of type with no
1842         relational operators.
1843         * testsuite/20_util/is_swappable/value.h: Likewise.
1844         * testsuite/24_iterators/output/concept.cc: Add operator< to
1845         type used in set.
1846
1847 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
1848
1849         * include/bits/boost_concept_check.h (_OutputIteratorConcept):
1850         Use a function to preserve value category of the type.
1851         * include/bits/stl_algobase.h (copy, move, fill_n): Use a
1852         reference as the second argument for _OutputIteratorConcept.
1853         (copy_backward, move_backward): Use _OutputIteratorConcept
1854         instead of _ConvertibleConcept.
1855
1856 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
1857
1858         * include/bits/stl_iterator.h (pointer_traits): Define partial
1859         specialization for __normal_iterator.
1860         * testsuite/24_iterators/normal_iterator/to_address.cc: New test.
1861
1862 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
1863
1864         * include/bits/move.h (forward(remove_reference_t<T>&&)):
1865         Improve text of static_assert.
1866         * testsuite/20_util/forward/c_neg.cc: Adjust dg-error.
1867         * testsuite/20_util/forward/f_neg.cc: Likewise.
1868
1869 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
1870
1871         PR libstdc++/102499
1872         * include/bits/fs_path.h (path::begin, path::end): Add noexcept
1873         to declarations, to match definitions.
1874
1875 2021-09-24  Jonathan Wakely  <jwakely@redhat.com>
1876
1877         * include/bits/range_access.h (cbegin, cend): Remove redundant
1878         'inline' specifier.
1879
1880 2021-09-23  Jonathan Wakely  <jwakely@redhat.com>
1881
1882         * testsuite/20_util/specialized_algorithms/memory_management_tools/destroy_neg.cc:
1883         Remove dg-error lines for C++20-only errors.
1884
1885 2021-09-23  Jonathan Wakely  <jwakely@redhat.com>
1886
1887         * testsuite/19_diagnostics/headers/system_error/93151.cc:
1888         Disable PCH.
1889
1890 2021-09-23  Jonathan Wakely  <jwakely@redhat.com>
1891
1892         * src/c++11/system_error.cc (system_error_category) [_WIN32]:
1893         Map Windows error codes to generic POSIX error numbers. Use
1894         FormatMessage instead of strerror.
1895         * testsuite/19_diagnostics/error_category/system_category.cc:
1896         Adjust for new behaviour on Windows.
1897
1898 2021-09-23  Jonathan Wakely  <jwakely@redhat.com>
1899
1900         * src/c++11/system_error.cc (generic_error_category): Define
1901         class and virtual functions as 'final'.
1902         (generic_error_category::equivalent(int, const error_condition&)):
1903         Override.
1904         (system_error_category): Define class and virtual functions as
1905         'final'.
1906         (system_error_category::equivalent(int, const error_condition&)):
1907         Override.
1908         (generic_category_instance, system_category_instance): Use
1909         constinit union to make the objects immortal.
1910
1911 2021-09-23  Jonathan Wakely  <jwakely@redhat.com>
1912
1913         PR libstdc++/102425
1914         * src/c++11/system_error.cc
1915         (system_error_category::default_error_condition): Add 0 to
1916         switch.
1917         * testsuite/19_diagnostics/error_category/102425.cc: New test.
1918
1919 2021-09-17  Jonathan Wakely  <jwakely@redhat.com>
1920
1921         * include/bits/fs_path.h (path::iterator): Add noexcept to all
1922         member functions and friend functions.
1923         (distance): Add noexcept.
1924         (advance): Add noexcept and inline.
1925         * include/experimental/bits/fs_path.h (path::iterator):
1926         Add noexcept to all member functions.
1927
1928 2021-09-17  Jonathan Wakely  <jwakely@redhat.com>
1929
1930         PR libstdc++/102270
1931         * include/std/tuple (_Tuple_impl): Add constexpr to constructor
1932         missed in previous patch.
1933         * testsuite/20_util/tuple/cons/102270.C: Moved to...
1934         * testsuite/20_util/tuple/cons/102270.cc: ...here.
1935         * testsuite/util/testsuite_allocator.h (SimpleAllocator): Add
1936         constexpr to constructor so it can be used for C++20 tests.
1937
1938 2021-09-17  Jonathan Wakely  <jwakely@redhat.com>
1939
1940         * testsuite/26_numerics/valarray/dr630-3.C: Moved to...
1941         * testsuite/26_numerics/valarray/dr630-3.cc: ...here.
1942         * testsuite/27_io/basic_iostream/cons/16251.C: Moved to...
1943         * testsuite/27_io/basic_iostream/cons/16251.cc: ...here.
1944
1945 2021-09-16  Jonathan Wakely  <jwakely@redhat.com>
1946
1947         * src/Makefile.am (stamp-debug): Add all Makefiles as
1948         prerequisites.
1949         * src/Makefile.in: Regenerate.
1950
1951 2021-09-16  Jonathan Wakely  <jwakely@redhat.com>
1952
1953         * testsuite/ext/pb_ds/regression/tree_map_rand.cc: Increase
1954         timeout factor to 3.
1955         * testsuite/ext/pb_ds/regression/tree_set_rand.cc: Likewise.
1956
1957 2021-09-16  Jonathan Wakely  <jwakely@redhat.com>
1958
1959         * doc/xml/manual/using.xml: Generalize to apply to more than
1960         just -std=c++11.
1961         * doc/html/manual/using_macros.html: Regenerate.
1962
1963 2021-09-16  Jonathan Wakely  <jwakely@redhat.com>
1964
1965         * include/std/optional (nullptr_t): Make constructor noexcept.
1966
1967 2021-09-16  Jonathan Wakely  <jwakely@redhat.com>
1968
1969         * include/bits/fs_path.h (advance): Remove non-deducible
1970         template parameter.
1971
1972 2021-09-16  Jonathan Wakely  <jwakely@redhat.com>
1973
1974         PR libstdc++/102270
1975         * include/std/tuple (_Head_base, _Tuple_impl): Add
1976         _GLIBCXX20_CONSTEXPR to allocator-extended constructors.
1977         (tuple<>::swap(tuple&)): Add _GLIBCXX20_CONSTEXPR.
1978         * testsuite/20_util/tuple/cons/102270.C: New test.
1979
1980 2021-09-16  Jonathan Wakely  <jwakely@redhat.com>
1981
1982         PR libstdc++/102280
1983         * include/std/span (span(Range&&)): Add constraint to deduction
1984         guide.
1985
1986 2021-09-16  Jonathan Wakely  <jwakely@redhat.com>
1987
1988         * src/c++98/Makefile.am: Use CXXCOMPILE not LTCXXCOMPILE.
1989         * src/c++98/Makefile.in: Regenerate.
1990
1991 2021-09-16  Jonathan Wakely  <jwakely@redhat.com>
1992
1993         * include/bits/basic_string.h [_GLIBCXX_USE_CXX11_ABI]
1994         (to_string): Add noexcept if the type width is 32 bits or less.
1995
1996 2021-09-16  Jonathan Wakely  <jwakely@redhat.com>
1997
1998         * include/bits/unique_ptr.h (__uniq_ptr_impl::_M_ptr)
1999         (__uniq_ptr_impl::_M_deleter): Add noexcept.
2000
2001 2021-09-16  Thomas Rodgers  <rodgert@twrodgers.com>
2002
2003         PR libstdc++/101761
2004         * testsuite/29_atomics/atomic_ref/wait_notify.cc (test): Use
2005         va and vb as arguments to wait/notify, remove unused bb local.
2006
2007 2021-09-15  Hugo Beauzée-Luyssen  <hugo@beauzee.fr>
2008
2009         * crossconfig.m4: Check for TLS support on mingw.
2010         * configure: Regenerate.
2011
2012 2021-09-13  Jason Merrill  <jason@redhat.com>
2013
2014         * include/std/version: Define __cpp_lib_hardware_interference_size.
2015         * libsupc++/new: Define hardware interference size variables.
2016
2017 2021-09-10  Jonathan Wakely  <jwakely@redhat.com>
2018
2019         * testsuite/experimental/net/internet/resolver/ops/lookup.cc:
2020         Fix invalid hostname to only match the .invalid TLD.
2021
2022 2021-09-02  Jonathan Wakely  <jwakely@redhat.com>
2023
2024         * include/bits/atomic_base.h (__atomic_base<P*>::compare_exchange_weak):
2025         Add new functions.
2026         * include/std/atomic (atomic<T*>::compare_exchange_weak): Use
2027         it.
2028
2029 2021-09-02  Jonathan Wakely  <jwakely@redhat.com>
2030
2031         * include/std/atomic: Tweak whitespace.
2032
2033 2021-09-02  Jonathan Wakely  <jwakely@redhat.com>
2034
2035         PR c++/102177
2036         * include/bits/atomic_base.h (__is_valid_cmpexch_failure_order):
2037         New function to check if a memory order is valid for the failure
2038         case of compare exchange operations.
2039         (__atomic_base<I>::compare_exchange_weak): Simplify assertions
2040         by using __is_valid_cmpexch_failure_order.
2041         (__atomic_base<I>::compare_exchange_strong): Likewise.
2042         (__atomic_base<P*>::compare_exchange_weak): Likewise.
2043         (__atomic_base<P*>::compare_exchange_strong): Likewise.
2044         (__atomic_impl::compare_exchange_weak): Add assertion.
2045         (__atomic_impl::compare_exchange_strong): Likewise.
2046         * include/std/atomic (atomic::compare_exchange_weak): Likewise.
2047         (atomic::compare_exchange_strong): Likewise.
2048
2049 2021-09-02  Jonathan Wakely  <jwakely@redhat.com>
2050
2051         * include/std/functional (invoke_r): Define.
2052         * include/std/version (__cpp_lib_invoke_r): Define.
2053         * testsuite/20_util/function_objects/invoke/version.cc: Check
2054         for __cpp_lib_invoke_r as well as __cpp_lib_invoke.
2055         * testsuite/20_util/function_objects/invoke/4.cc: New test.
2056
2057 2021-08-31  Jonathan Wakely  <jwakely@redhat.com>
2058
2059         PR libstdc++/98421
2060         * include/std/span (span(Iter, size_type), span(Iter, Iter)):
2061         Add valid range checks.
2062         * testsuite/23_containers/span/cons_1_assert_neg.cc: New test.
2063         * testsuite/23_containers/span/cons_2_assert_neg.cc: New test.
2064
2065 2021-08-31  Jonathan Wakely  <jwakely@redhat.com>
2066
2067         * configure.ac: Fix checks for F_GETFL, F_SETFL and O_NONBLOCK.
2068         * configure: Regenerate.
2069
2070 2021-08-31  Jonathan Wakely  <jwakely@redhat.com>
2071
2072         * src/c++11/system_error.cc (error_category::~error_category()):
2073         Remove noexcept-specifier.
2074         (system_error::~system_error()): Likewise.
2075         * testsuite/19_diagnostics/error_category/noexcept.cc: New test.
2076         * testsuite/19_diagnostics/system_error/noexcept.cc: New test.
2077
2078 2021-08-31  Jonathan Wakely  <jwakely@redhat.com>
2079
2080         PR libstdc++/102074
2081         * include/bits/atomic_timed_wait.h (__timed_waiter_pool)
2082         [!_GLIBCXX_HAVE_PLATFORM_TIMED_WAIT]: Add missing return.
2083
2084 2021-08-31  Jonathan Wakely  <jwakely@redhat.com>
2085
2086         * include/experimental/internet (__make_resolver_error_code):
2087         Handle EAI_SYSTEM errors.
2088         (basic_resolver_results): Use __make_resolver_error_code. Use
2089         Glibc NI_MAXHOST and NI_MAXSERV values for buffer sizes.
2090
2091 2021-08-31  Jonathan Wakely  <jwakely@redhat.com>
2092
2093         * testsuite/experimental/net/internet/resolver/ops/lookup.cc:
2094         Try other service if "http" fails.
2095
2096 2021-08-31  Jonathan Wakely  <jwakely@redhat.com>
2097
2098         * testsuite/17_intro/names.cc: Undefine some more names used
2099         by Solaris system headers.
2100
2101 2021-08-30  Jason Merrill  <jason@redhat.com>
2102
2103         PR c++/96286
2104         * testsuite/30_threads/promise/requirements/lwg3466.cc:
2105         Remove dg-prune-outputs.
2106
2107 2021-08-28  Jonathan Wakely  <jwakely@redhat.com>
2108
2109         * include/bits/alloc_traits.h (allocator_traits): Add explicit
2110         specialization for allocator<void>. Improve doxygen comments.
2111         * include/bits/allocator.h (allocator<void>): Restore for the
2112         versioned namespace.
2113         (allocator<void>::construct, allocator<void>::destroy): Remove.
2114         * include/ext/extptr_allocator.h (_Extptr_allocator<void>):
2115         Add default constructor and converting constructor.
2116
2117 2021-08-28  Jonathan Wakely  <jwakely@redhat.com>
2118
2119         * include/bits/stl_uninitialized.h: Fix typo in comment.
2120
2121 2021-08-28  Jonathan Wakely  <jwakely@redhat.com>
2122
2123         PR libstdc++/99876
2124         * src/c++17/fs_ops.cc (fs::absolute): Call non-throwing form,
2125         to avoid unnecessary current_path() call.
2126
2127 2021-08-28  Jonathan Wakely  <jwakely@redhat.com>
2128
2129         * include/bits/std_function.h (function::function(F&&)): Give
2130         name to defaulted template parameter, to improve diagnostics.
2131         Use markdown for more doxygen comments.
2132
2133 2021-08-26  Jonathan Wakely  <jwakely@redhat.com>
2134
2135         * include/bits/std_function.h (function): Adjust doxygen
2136         comments.
2137         * include/bits/unique_ptr.h (make_unique_for_overwrite):
2138         Change parameter name to match doxygen comment.
2139
2140 2021-08-26  Jonathan Wakely  <jwakely@redhat.com>
2141
2142         * include/bits/std_function.h (_function_base::_Base_manager):
2143         Replace _M_init_functor with a function template using a
2144         forwarding reference, and a pair of _M_create function
2145         templates. Reuse _M_create for the clone operation.
2146         (function::_Decay_t): New alias template.
2147         (function::_Callable): Simplify by using _Decay.
2148         (function::function(F)): Change parameter to forwarding
2149         reference, as per LWG 2447. Add noexcept-specifier. Simplify
2150         constraints.
2151         (function::operator=(F&&)): Add noexcept-specifier.
2152         * testsuite/20_util/function/cons/lwg2774.cc: New test.
2153         * testsuite/20_util/function/cons/noexcept.cc: New test.
2154
2155 2021-08-26  Jonathan Wakely  <jwakely@redhat.com>
2156
2157         * include/bits/std_function.h (function::function(F)): Add
2158         static assertions to check constructibility requirements.
2159
2160 2021-08-26  Jonathan Wakely  <jwakely@redhat.com>
2161
2162         PR libstdc++/100285
2163         * configure.ac: Check for O_NONBLOCK.
2164         * configure: Regenerate.
2165         * include/experimental/internet: Include <ws2tcpip.h> for
2166         Windows.  Use preprocessor conditions around more constants.
2167         * include/experimental/socket: Use preprocessor conditions
2168         around more constants.
2169         * testsuite/experimental/net/internet/resolver/base.cc: Only use
2170         constants when the corresponding C macro is defined.
2171         * testsuite/experimental/net/socket/basic_socket.cc: Likewise.
2172         * testsuite/experimental/net/socket/socket_base.cc: Likewise.
2173         Make preprocessor checks more fine-grained.
2174
2175 2021-08-25  Jonathan Wakely  <jwakely@redhat.com>
2176
2177         * testsuite/17_intro/names.cc: Check 'sz'.
2178
2179 2021-08-25  Jonathan Wakely  <jwakely@redhat.com>
2180
2181         * testsuite/17_intro/names.cc: Adjust for Windows.
2182
2183 2021-08-25  Jonathan Wakely  <jwakely@redhat.com>
2184
2185         * include/std/valarray: Uglify 'func' parameters.
2186         * testsuite/17_intro/names.cc: Add 'func' to checks.
2187
2188 2021-08-25  Jonathan Wakely  <jwakely@redhat.com>
2189
2190         PR libstdc++/102064
2191         * include/bits/stl_uninitialized.h (_GLIBCXX_USE_ASSIGN_FOR_INIT):
2192         Define macro to check conditions for optimizing trivial cases.
2193         (__check_constructible): New function to do static assert.
2194         (uninitialized_copy, uninitialized_fill, uninitialized_fill_n):
2195         Use new macro.
2196         * testsuite/20_util/specialized_algorithms/uninitialized_copy/1.cc:
2197         Adjust dg-error pattern.
2198         * testsuite/23_containers/vector/cons/89164.cc: Likewise. Add
2199         C++17-specific checks from 89164_c++17.cc.
2200         * testsuite/23_containers/vector/cons/89164_c++17.cc: Removed.
2201         * testsuite/20_util/specialized_algorithms/uninitialized_copy/102064.cc:
2202         New test.
2203         * testsuite/20_util/specialized_algorithms/uninitialized_copy_n/102064.cc:
2204         New test.
2205         * testsuite/20_util/specialized_algorithms/uninitialized_fill/102064.cc:
2206         New test.
2207         * testsuite/20_util/specialized_algorithms/uninitialized_fill_n/102064.cc:
2208         New test.
2209
2210 2021-08-25  Jonathan Wakely  <jwakely@redhat.com>
2211
2212         PR libstdc++/102048
2213         * include/ext/rope (rope::erase(size_type)): Remove broken
2214         function.
2215
2216 2021-08-24  Jonathan Wakely  <jwakely@redhat.com>
2217
2218         * doc/xml/manual/status_cxx2020.xml: Update table.
2219         * doc/html/manual/status.html: Regenerate.
2220
2221 2021-08-24  Jonathan Wakely  <jwakely@redhat.com>
2222
2223         * include/std/type_traits (is_layout_compatible): Define.
2224         (is_corresponding_member): Define.
2225         * include/std/version (__cpp_lib_is_layout_compatible): Define.
2226         * testsuite/20_util/is_layout_compatible/is_corresponding_member.cc:
2227         New test.
2228         * testsuite/20_util/is_layout_compatible/value.cc: New test.
2229         * testsuite/20_util/is_layout_compatible/version.cc: New test.
2230         * testsuite/20_util/is_pointer_interconvertible/with_class.cc:
2231         New test.
2232         * testsuite/23_containers/span/layout_compat.cc: Do not use real
2233         std::is_layout_compatible trait if available.
2234
2235 2021-08-24  Jonathan Wakely  <jwakely@redhat.com>
2236
2237         * src/c++11/cxx11-shim_facets.cc: Fix mismatched class-key in
2238         explicit instantiation definitions.
2239
2240 2021-08-23  Jonathan Wakely  <jwakely@redhat.com>
2241
2242         * include/std/ranges (basic_istream_view): Add default template
2243         argument.
2244         * testsuite/std/ranges/istream_view.cc: Check it.
2245
2246 2021-08-23  Jonathan Wakely  <jwakely@redhat.com>
2247
2248         * libsupc++/dyncast.cc (__dynamic_cast): Add __builtin_expect to
2249         precondition check.
2250
2251 2021-08-23  Jonathan Wakely  <jwakely@redhat.com>
2252
2253         PR libstdc++/90787
2254         * testsuite/util/testsuite_fs.h (permissions_are_testable):
2255         Define as inline.
2256
2257 2021-08-20  Jonathan Wakely  <jwakely@redhat.com>
2258
2259         PR libstdc++/90787
2260         * testsuite/27_io/filesystem/iterators/directory_iterator.cc:
2261         Use new __gnu_test::permissions_are_testable() function.
2262         * testsuite/27_io/filesystem/iterators/recursive_directory_iterator.cc:
2263         Likewise.
2264         * testsuite/27_io/filesystem/operations/exists.cc: Likewise.
2265         * testsuite/27_io/filesystem/operations/is_empty.cc: Likewise.
2266         * testsuite/27_io/filesystem/operations/remove.cc: Likewise.
2267         * testsuite/27_io/filesystem/operations/remove_all.cc: Likewise.
2268         * testsuite/27_io/filesystem/operations/status.cc: Likewise.
2269         * testsuite/27_io/filesystem/operations/symlink_status.cc:
2270         Likewise.
2271         * testsuite/27_io/filesystem/operations/temp_directory_path.cc:
2272         Likewise.
2273         * testsuite/experimental/filesystem/iterators/directory_iterator.cc:
2274         Likewise.
2275         * testsuite/experimental/filesystem/iterators/recursive_directory_iterator.cc:
2276         Likewise.
2277         * testsuite/experimental/filesystem/operations/exists.cc:
2278         Likewise.
2279         * testsuite/experimental/filesystem/operations/is_empty.cc:
2280         Likewise.
2281         * testsuite/experimental/filesystem/operations/remove.cc:
2282         Likewise.
2283         * testsuite/experimental/filesystem/operations/remove_all.cc:
2284         Likewise.
2285         * testsuite/experimental/filesystem/operations/temp_directory_path.cc:
2286         Likewise.
2287         * testsuite/util/testsuite_fs.h (__gnu_test::permissions_are_testable):
2288         New function to guess whether testing permissions will work.
2289
2290 2021-08-19  Jonathan Wakely  <jwakely@redhat.com>
2291
2292         * doc/xml/manual/status_cxx2020.xml: Move row  earlier in table.
2293         * doc/html/manual/status.html: Regenerate.
2294
2295 2021-08-19  Jonathan Wakely  <jwakely@redhat.com>
2296
2297         * doc/doxygen/user.cfg.in: Update to Doxygen 1.9.2
2298
2299 2021-08-19  Jonathan Wakely  <jwakely@redhat.com>
2300
2301         PR libstdc++/101965
2302         * include/std/charconv (__to_chars_i): Remove redundant check.
2303
2304 2021-08-19  Jonathan Wakely  <jwakely@redhat.com>
2305
2306         PR libstdc++/101960
2307         * include/std/tuple (_Tuple_impl(_Tuple_impl&&)): Use base
2308         class' move constructor. Define as defaulted for versioned
2309         namespace.
2310         * testsuite/20_util/tuple/cons/101960.cc: New test.
2311
2312 2021-08-19  Jonathan Wakely  <jwakely@redhat.com>
2313
2314         PR libstdc++/100139
2315         * doc/xml/manual/status_cxx2020.xml: Add P1739R4 to status table.
2316         * doc/html/manual/status.html: Regenerate.
2317
2318 2021-08-19  Jonathan Wakely  <jwakely@redhat.com>
2319
2320         * include/bits/shared_ptr.h: Add @since and @headerfile tags.
2321         * include/bits/unique_ptr.h: Add @headerfile tags.
2322
2323 2021-08-19  Jonathan Wakely  <jwakely@redhat.com>
2324
2325         * src/filesystem/ops-common.h (filesystem::file_time): Improve
2326         overflow check by using system_clock::duration::max().
2327
2328 2021-08-19  Jonathan Wakely  <jwakely@redhat.com>
2329
2330         * include/bits/stl_tree.h: Tweak whitespace.
2331
2332 2021-08-18  Jonathan Wakely  <jwakely@redhat.com>
2333
2334         * include/bits/unique_ptr.h (default_delete): Add @since tag.
2335         (unique_ptr, unique_ptr<T[]>): Likewise. Improve @brief.
2336         (make_unique, make_unique_for_overwrite): Likewise. Add @tparam,
2337         @param, and @returns.
2338         (_MakeUniq): Move to __detail namespace. Add alias template
2339         helpers.
2340
2341 2021-08-18  Jonathan Wakely  <jwakely@redhat.com>
2342
2343         * include/bits/stl_function.h: Improve doxygen comments.
2344
2345 2021-08-18  Jonathan Wakely  <jwakely@redhat.com>
2346
2347         * doc/doxygen/user.cfg.in (PREDEFINED): Enable doxygen
2348         processing for C++20 components and components that depend on
2349         compiler features.
2350         * include/bits/stl_algo.h (random_shuffle): Use @deprecated.
2351         * include/std/type_traits: Improve doxygen comments for C++20
2352         traits.
2353
2354 2021-08-18  Jonathan Wakely  <jwakely@redhat.com>
2355
2356         * include/ext/type_traits.h (__promote_2, __promote_3)
2357         (__promote_4): Redfine as alias templates using __promoted_t.
2358         * include/std/complex (__promote_2): Remove partial
2359         specializations for std::complex.
2360
2361 2021-08-18  Jonathan Wakely  <jwakely@redhat.com>
2362
2363         * include/bits/stl_algo.h (min(initializer_list<T>))
2364         (min(initializer_list<T>, Compare)): Call __min_element directly to
2365         avoid redundant debug checks for valid ranges.
2366         (max(initializer_list<T>), max(initializer_list<T>, Compare)):
2367         Likewise, for __max_element.
2368         (minmax(initializer_list<T>), minmax(initializer_list<T>, Compare)):
2369         Likewise, for __minmax_element.
2370
2371 2021-08-18  Jonathan Wakely  <jwakely@redhat.com>
2372
2373         * include/debug/deque (deque(size_type, const T&, const A&)):
2374         Prevent class template argument deduction and replace with a
2375         deduction guide.
2376         * include/debug/forward_list (forward_list(size_type, const T&, const A&)):
2377         Likewise.
2378         * include/debug/list (list(size_type, const T&, const A&)):
2379         Likewise.
2380         * include/debug/vector (vector(size_type, const T&, const A&)):
2381         Likewise.
2382
2383 2021-08-18  Jonathan Wakely  <jwakely@redhat.com>
2384
2385         * python/libstdcxx/v6/printers.py (StdBitReferencePrinter): Use
2386         'std::vector<bool>::reference' as type name, not _Bit_reference.
2387         (build_libstdcxx_dictionary): Register printers for vector<bool>
2388         types in debug mode too.
2389         * testsuite/libstdc++-prettyprinters/simple.cc: Adjust expected
2390         output for invalid _Bit_reference. Use vector<bool>::reference
2391         instead of _Bit_reference.
2392         * testsuite/libstdc++-prettyprinters/simple11.cc: Likewise.
2393
2394 2021-08-17  Thomas Schwinge  <thomas@codesourcery.com>
2395
2396         * testsuite/lib/libstdc++.exp: Avoid illegal argument to verbose,
2397         continued.
2398
2399 2021-08-17  Luc Michel  <lmichel@kalray.eu>
2400             Marc Poulhies  <mpoulhies@kalrayinc.com>
2401
2402         * testsuite/lib/gdb-test.exp (gdb_version_check)
2403         (gdb_version_check_xmethods): Only check the GDB version for
2404         local native targets.
2405
2406 2021-08-17  Antony Polukhin  <antoshkka@gmail.com>
2407             Jonathan Wakely  <jwakely@redhat.com>
2408
2409         * include/bits/random.tcc (seed_seq::seed_seq): Reserve capacity
2410         if distance is O(1).
2411         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error
2412         line number.
2413
2414 2021-08-17  Jonathan Wakely  <jwakely@redhat.com>
2415
2416         * testsuite/26_numerics/random/seed_seq/cons/range.cc: Check
2417         construction from input iterators.
2418
2419 2021-08-17  Jonathan Wakely  <jwakely@redhat.com>
2420
2421         * python/libstdcxx/v6/printers.py (StdErrorCatPrinter): Remove.
2422
2423 2021-08-17  Jonathan Wakely  <jwakely@redhat.com>
2424
2425         PR libstdc++/101923
2426         * include/bits/std_function.h (function(function&&)): Check for
2427         non-empty parameter before doing any work.
2428
2429 2021-08-17  Jonathan Wakely  <jwakely@redhat.com>
2430
2431         * include/bits/cow_string.h (basic_string::contains): Do not
2432         define for -std=gnu++20.
2433
2434 2021-08-17  Jonathan Wakely  <jwakely@redhat.com>
2435
2436         * include/bits/ranges_util.h (__not_same_as): Rename to
2437         __different_from.
2438         * include/std/ranges (__not_same_as): Likewise.
2439
2440 2021-08-17  Jonathan Wakely  <jwakely@redhat.com>
2441
2442         * include/std/utility (exchange): Add noexcept-specifier.
2443         * testsuite/20_util/exchange/noexcept.cc: New test.
2444
2445 2021-08-17  Jonathan Wakely  <jwakely@redhat.com>
2446
2447         * python/libstdcxx/v6/printers.py (StdErrorCodePrinter): Define.
2448         (build_libstdcxx_dictionary): Register printer for
2449         std::error_code and std::error_condition.
2450         * testsuite/libstdc++-prettyprinters/cxx11.cc: Test it.
2451
2452 2021-08-16  Jonathan Wakely  <jwakely@redhat.com>
2453
2454         PR libstdc++/101937
2455         * src/c++11/debug.cc (PrintContext::_M_indent): Replace with a
2456         static data member.
2457         (print_word): Use qualified-id to access it.
2458
2459 2021-08-16  Jonathan Wakely  <jwakely@redhat.com>
2460
2461         * python/Makefile.am [GLIBCXX_BUILD_DEBUG] (install-data-local):
2462         Install another copy of the GDB hook.
2463         * python/Makefile.in: Regenerate.
2464
2465 2021-08-12  Jonathan Wakely  <jwakely@redhat.com>
2466
2467         PR libstdc++/101870
2468         * include/c_global/cmath (hypot): Use __promoted_t.
2469         (lerp): Add new overload accepting any arithmetic types.
2470         * include/ext/type_traits.h (__promoted_t): New alias template.
2471         * testsuite/26_numerics/lerp.cc: Moved to...
2472         * testsuite/26_numerics/lerp/1.cc: ...here.
2473         * testsuite/26_numerics/lerp/constexpr.cc: New test.
2474         * testsuite/26_numerics/lerp/version.cc: New test.
2475
2476 2021-08-12  Jonathan Wakely  <jwakely@redhat.com>
2477
2478         * testsuite/26_numerics/lerp.cc: Add header name to #error.
2479         * testsuite/26_numerics/midpoint/integral.cc: Likewise.
2480         * testsuite/26_numerics/midpoint/version.cc: New test.
2481
2482 2021-08-12  Jonathan Wakely  <jwakely@redhat.com>
2483
2484         * include/experimental/random (experimental::randint): Add
2485         nodiscard attribute.
2486
2487 2021-08-12  Jonathan Wakely  <jwakely@redhat.com>
2488
2489         * src/c++98/locale_init.cc: Require C++11.
2490         * src/c++98/localename.cc: Likewise.
2491         * src/c++98/misc-inst.cc: Require C++98.
2492
2493 2021-08-11  Jonathan Wakely  <jwakely@redhat.com>
2494
2495         PR libstdc++/101866
2496         * testsuite/experimental/random/randint.cc: Loop and retry if
2497         reseed() produces the same sequence.
2498
2499 2021-08-11  Jonathan Wakely  <jwakely@redhat.com>
2500
2501         * include/std/type_traits (__cpp_lib_is_pointer_interconvertible)
2502         (is_pointer_interconvertible_base_of_v)
2503         (is_pointer_interconvertible_base_of): Define for C++20.
2504         * include/std/version (__cpp_lib_is_pointer_interconvertible):
2505         Define.
2506         * testsuite/23_containers/span/layout_compat.cc: Use correct
2507         feature test macro for std::is_layout_compatible_v.
2508         * testsuite/20_util/is_pointer_interconvertible/value.cc: New test.
2509         * testsuite/20_util/is_pointer_interconvertible/version.cc: New test.
2510
2511 2021-08-09  Jonathan Wakely  <jwakely@redhat.com>
2512
2513         * include/bits/regex.h (basic_regex::transform_primary): Use
2514         _GLIBCXX_STD_C::vector for local variable.
2515         * include/bits/regex.tcc (__regex_algo_impl): Use reference to
2516         _GLIBCXX_STD_C::vector base class of match_results.
2517         * include/bits/regex_automaton.tcc (_StateSeq:_M_clone): Use
2518         _GLIBCXX_STD_C::map and _GLIBCXX_STD_C::deque for local
2519         variables.
2520         * include/bits/regex_compiler.h (_BracketMatcher): Use
2521         _GLIBCXX_STD_C::vector for data members.
2522         * include/bits/regex_executor.h (_Executor): Likewise.
2523         * include/std/regex [_GLIBCXX_DEBUG]: Include <debug/vector>.
2524
2525 2021-08-09  François Dumont  <fdumont@gcc.gnu.org>
2526
2527         * include/debug/safe_container.h
2528         (_Safe_container(_Safe_container&&, const _Alloc&, std::true_type)): New.
2529         (_Safe_container(_Safe_container&&, const _Alloc&, std::false_type)): New.
2530         (_Safe_container(_Safe_container&&, const _Alloc&)): Use latters.
2531
2532 2021-08-09  Jonathan Wakely  <jwakely@redhat.com>
2533
2534         * testsuite/23_containers/unordered_map/cons/default.cc: Add
2535         equality comparison operators to allocator.
2536         * testsuite/23_containers/unordered_set/cons/default.cc:
2537         Likewise.
2538
2539 2021-08-08  François Dumont  <fdumont@gcc.gnu.org>
2540
2541         * testsuite/25_algorithms/copy/debug/constexpr_neg.cc: Replace 'failed_assertion'
2542         dg-prune-output reason with 'builtin_unreachable'.
2543         * testsuite/25_algorithms/copy_backward/debug/constexpr_neg.cc: Likewise.
2544         * testsuite/25_algorithms/equal/debug/constexpr_neg.cc: Likewise.
2545         * testsuite/25_algorithms/lower_bound/debug/constexpr_partitioned_neg.cc: Likewise.
2546         * testsuite/25_algorithms/lower_bound/debug/constexpr_partitioned_pred_neg.cc: Likewise.
2547         * testsuite/25_algorithms/lower_bound/debug/constexpr_valid_range_neg.cc: Likewise.
2548         * testsuite/25_algorithms/upper_bound/debug/constexpr_partitioned_neg.cc: Likewise.
2549         * testsuite/25_algorithms/upper_bound/debug/constexpr_partitioned_pred_neg.cc: Likewise.
2550         * testsuite/25_algorithms/upper_bound/debug/constexpr_valid_range_neg.cc: Likewise.
2551
2552 2021-08-08  Hans-Peter Nilsson  <hp@bitrange.com>
2553
2554         * testsuite/std/ranges/iota/max_size_type.cc: Set
2555         dg-timeout-factor to 4.
2556
2557 2021-08-06  Jonathan Wakely  <jwakely@redhat.com>
2558
2559         * libsupc++/compare (compare_three_way, strong_order)
2560         (weak_order, partial_order, compare_strong_order_fallback)
2561         (compare_weak_order_fallback, compare_partial_order_fallback):
2562         Move nodiscard attributes to correct location.
2563
2564 2021-08-05  Jonathan Wakely  <jwakely@redhat.com>
2565
2566         PR libstdc++/101782
2567         * include/bits/ranges_base.h (ranges::begin, ranges::end)
2568         (ranges::rbegin, ranges::rend, ranges::size, ranges::ssize)
2569         (ranges::empty, ranges::data): Move attribute after the
2570         declarator-id instead of at the end of the declarator.
2571         * include/bits/stl_iterator.h (__gnu_cxx::__normal_iterator):
2572         Move attributes back to the start of the function declarator,
2573         but move the requires-clause to the end.
2574         (common_iterator): Move attribute after the declarator-id.
2575         * include/bits/stl_queue.h (queue): Remove ill-formed attributes
2576         from friend declaration that are not definitions.
2577         * include/std/ranges (views::all, views::filter)
2578         (views::transform, views::take, views::take_while,
2579         views::drop) (views::drop_while, views::join,
2580         views::lazy_split) (views::split, views::counted,
2581         views::common, views::reverse) (views::elements): Move
2582         attributes after the declarator-id.
2583
2584 2021-08-05  Jonathan Wakely  <jwakely@redhat.com>
2585
2586         * libsupc++/compare (partial_ordering, weak_ordering)
2587         (strong_ordering, is_eq, is_neq, is_lt, is_lteq, is_gt, is_gteq)
2588         (compare_three_way, strong_order, weak_order, partial_order)
2589         (compare_strong_order_fallback, compare_weak_order_fallback)
2590         (compare_partial_order_fallback, __detail::__synth3way): Add
2591         nodiscard attribute.
2592         * testsuite/18_support/comparisons/categories/zero_neg.cc: Add
2593         -Wno-unused-result to options.
2594
2595 2021-08-05  Jonathan Wakely  <jwakely@redhat.com>
2596
2597         PR libstdc++/101782
2598         * include/bits/ranges_base.h (ranges::begin, ranges::end)
2599         (ranges::rbegin, ranges::rend, ranges::size, ranges::ssize)
2600         (ranges::empty, ranges::data): Move attribute to the end of
2601         the declarator.
2602         * include/bits/stl_iterator.h (__gnu_cxx::__normal_iterator)
2603         (common_iterator): Likewise for non-member operator functions.
2604         * include/std/ranges (views::all, views::filter)
2605         (views::transform, views::take, views::take_while, views::drop)
2606         (views::drop_while, views::join, views::lazy_split)
2607         (views::split, views::counted, views::common, views::reverse)
2608         (views::elements): Likewise.
2609         * testsuite/std/ranges/access/101782.cc: New test.
2610
2611 2021-08-04  Jonathan Wakely  <jwakely@redhat.com>
2612
2613         * include/bits/forward_list.h: Add [[nodiscard]] to functions
2614         with no side-effects.
2615         * include/bits/stl_bvector.h: Likewise.
2616         * include/bits/stl_deque.h: Likewise.
2617         * include/bits/stl_list.h: Likewise.
2618         * include/bits/stl_queue.h: Likewise.
2619         * include/bits/stl_stack.h: Likewise.
2620         * include/bits/stl_vector.h: Likewise.
2621         * include/debug/deque: Likewise.
2622         * include/debug/forward_list: Likewise.
2623         * include/debug/list: Likewise.
2624         * include/debug/safe_iterator.h: Likewise.
2625         * include/debug/vector: Likewise.
2626         * include/std/array: Likewise.
2627         * testsuite/23_containers/array/creation/3_neg.cc: Use
2628         -Wno-unused-result.
2629         * testsuite/23_containers/array/debug/back1_neg.cc: Cast result
2630         to void.
2631         * testsuite/23_containers/array/debug/back2_neg.cc: Likewise.
2632         * testsuite/23_containers/array/debug/front1_neg.cc: Likewise.
2633         * testsuite/23_containers/array/debug/front2_neg.cc: Likewise.
2634         * testsuite/23_containers/array/debug/square_brackets_operator1_neg.cc:
2635         Likewise.
2636         * testsuite/23_containers/array/debug/square_brackets_operator2_neg.cc:
2637         Likewise.
2638         * testsuite/23_containers/array/tuple_interface/get_neg.cc:
2639         Adjust dg-error line numbers.
2640         * testsuite/23_containers/deque/cons/clear_allocator.cc: Cast
2641         result to void.
2642         * testsuite/23_containers/deque/debug/invalidation/4.cc:
2643         Likewise.
2644         * testsuite/23_containers/deque/types/1.cc: Use
2645         -Wno-unused-result.
2646         * testsuite/23_containers/list/types/1.cc: Cast result to void.
2647         * testsuite/23_containers/priority_queue/members/7161.cc:
2648         Likewise.
2649         * testsuite/23_containers/queue/members/7157.cc: Likewise.
2650         * testsuite/23_containers/vector/59829.cc: Likewise.
2651         * testsuite/23_containers/vector/ext_pointer/types/1.cc:
2652         Likewise.
2653         * testsuite/23_containers/vector/ext_pointer/types/2.cc:
2654         Likewise.
2655         * testsuite/23_containers/vector/types/1.cc: Use
2656         -Wno-unused-result.
2657
2658 2021-08-04  Jonathan Wakely  <jwakely@redhat.com>
2659
2660         * include/bits/iterator_concepts.h (iter_move): Add
2661         [[nodiscard]].
2662         * include/bits/range_access.h (begin, end, cbegin, cend)
2663         (rbegin, rend, crbegin, crend, size, data, ssize): Likewise.
2664         * include/bits/ranges_base.h (ranges::begin, ranges::end)
2665         (ranges::cbegin, ranges::cend, ranges::rbegin, ranges::rend)
2666         (ranges::crbegin, ranges::crend, ranges::size, ranges::ssize)
2667         (ranges::empty, ranges::data, ranges::cdata): Likewise.
2668         * include/bits/stl_iterator.h (reverse_iterator, __normal_iterator)
2669         (back_insert_iterator, front_insert_iterator, insert_iterator)
2670         (move_iterator, move_sentinel, common_iterator)
2671         (counted_iterator): Likewise.
2672         * include/bits/stl_iterator_base_funcs.h (distance, next, prev):
2673         Likewise.
2674         * include/bits/stream_iterator.h (istream_iterator)
2675         (ostream_iterartor): Likewise.
2676         * include/bits/streambuf_iterator.h (istreambuf_iterator)
2677         (ostreambuf_iterator): Likewise.
2678         * include/std/ranges (views::single, views::iota, views::all)
2679         (views::filter, views::transform, views::take, views::take_while)
2680         (views::drop, views::drop_while, views::join, views::lazy_split)
2681         (views::split, views::counted, views::common, views::reverse)
2682         (views::elements): Likewise.
2683         * testsuite/20_util/rel_ops.cc: Use -Wno-unused-result.
2684         * testsuite/24_iterators/move_iterator/greedy_ops.cc: Likewise.
2685         * testsuite/24_iterators/normal_iterator/greedy_ops.cc:
2686         Likewise.
2687         * testsuite/24_iterators/reverse_iterator/2.cc: Likewise.
2688         * testsuite/24_iterators/reverse_iterator/greedy_ops.cc:
2689         Likewise.
2690         * testsuite/21_strings/basic_string/range_access/char/1.cc:
2691         Cast result to void.
2692         * testsuite/21_strings/basic_string/range_access/wchar_t/1.cc:
2693         Likewise.
2694         * testsuite/21_strings/basic_string_view/range_access/char/1.cc:
2695         Likewise.
2696         * testsuite/21_strings/basic_string_view/range_access/wchar_t/1.cc:
2697         Likewise.
2698         * testsuite/23_containers/array/range_access.cc: Likewise.
2699         * testsuite/23_containers/deque/range_access.cc: Likewise.
2700         * testsuite/23_containers/forward_list/range_access.cc:
2701         Likewise.
2702         * testsuite/23_containers/list/range_access.cc: Likewise.
2703         * testsuite/23_containers/map/range_access.cc: Likewise.
2704         * testsuite/23_containers/multimap/range_access.cc: Likewise.
2705         * testsuite/23_containers/multiset/range_access.cc: Likewise.
2706         * testsuite/23_containers/set/range_access.cc: Likewise.
2707         * testsuite/23_containers/unordered_map/range_access.cc:
2708         Likewise.
2709         * testsuite/23_containers/unordered_multimap/range_access.cc:
2710         Likewise.
2711         * testsuite/23_containers/unordered_multiset/range_access.cc:
2712         Likewise.
2713         * testsuite/23_containers/unordered_set/range_access.cc:
2714         Likewise.
2715         * testsuite/23_containers/vector/range_access.cc: Likewise.
2716         * testsuite/24_iterators/customization_points/iter_move.cc:
2717         Likewise.
2718         * testsuite/24_iterators/istream_iterator/sentinel.cc:
2719         Likewise.
2720         * testsuite/24_iterators/istreambuf_iterator/sentinel.cc:
2721         Likewise.
2722         * testsuite/24_iterators/move_iterator/dr2061.cc: Likewise.
2723         * testsuite/24_iterators/operations/prev_neg.cc: Likewise.
2724         * testsuite/24_iterators/ostreambuf_iterator/2.cc: Likewise.
2725         * testsuite/24_iterators/range_access/range_access.cc:
2726         Likewise.
2727         * testsuite/24_iterators/range_operations/100768.cc: Likewise.
2728         * testsuite/26_numerics/valarray/range_access2.cc: Likewise.
2729         * testsuite/28_regex/range_access.cc: Likewise.
2730         * testsuite/experimental/string_view/range_access/char/1.cc:
2731         Likewise.
2732         * testsuite/experimental/string_view/range_access/wchar_t/1.cc:
2733         Likewise.
2734         * testsuite/ext/vstring/range_access.cc: Likewise.
2735         * testsuite/std/ranges/adaptors/take.cc: Likewise.
2736         * testsuite/std/ranges/p2259.cc: Likewise.
2737
2738 2021-08-03  Jonathan Wakely  <jwakely@redhat.com>
2739
2740         * include/bits/random.tcc (linear_congruential_engine): Do not
2741         define static constexpr members when they are implicitly inline.
2742         * include/std/ratio (ratio, __ratio_multiply, __ratio_divide)
2743         (__ratio_add, __ratio_subtract): Likewise.
2744         * include/std/type_traits (integral_constant): Likewise.
2745         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error
2746         line number.
2747
2748 2021-08-03  Jonathan Wakely  <jwakely@redhat.com>
2749
2750         * testsuite/util/testsuite_common_types.h: Replace uses of
2751         tr1::unordered_map and tr1::unordered_set with their C++11
2752         equivalents.
2753         * testsuite/29_atomics/atomic/cons/assign_neg.cc: Adjust
2754         dg-error line number.
2755         * testsuite/29_atomics/atomic/cons/copy_neg.cc: Likewise.
2756         * testsuite/29_atomics/atomic_integral/cons/assign_neg.cc:
2757         Likewise.
2758         * testsuite/29_atomics/atomic_integral/cons/copy_neg.cc:
2759         Likewise.
2760         * testsuite/29_atomics/atomic_integral/operators/bitwise_neg.cc:
2761         Likewise.
2762         * testsuite/29_atomics/atomic_integral/operators/decrement_neg.cc:
2763         Likewise.
2764         * testsuite/29_atomics/atomic_integral/operators/increment_neg.cc:
2765         Likewise.
2766
2767 2021-08-03  Jonathan Wakely  <jwakely@redhat.com>
2768
2769         * include/std/memory_resource (polymorphic_allocator::delete_object):
2770         Call destructor directly instead of using destroy.
2771         (allocator_traits<polymorphic_allocator<T>>): Define partial
2772         specialization.
2773
2774 2021-08-03  Jonathan Wakely  <jwakely@redhat.com>
2775
2776         * testsuite/20_util/function_objects/binders/3113.cc: Remove
2777         trailing whitespace.
2778         * testsuite/20_util/shared_ptr/assign/auto_ptr.cc: Likewise.
2779         * testsuite/20_util/shared_ptr/assign/auto_ptr_neg.cc: Likewise.
2780         * testsuite/20_util/shared_ptr/assign/auto_ptr_rvalue.cc:
2781         Likewise.
2782         * testsuite/20_util/shared_ptr/creation/dr925.cc: Likewise.
2783         * testsuite/25_algorithms/headers/algorithm/synopsis.cc:
2784         Likewise.
2785         * testsuite/25_algorithms/random_shuffle/requirements/explicit_instantiation/2.cc:
2786         Likewise.
2787         * testsuite/25_algorithms/random_shuffle/requirements/explicit_instantiation/pod.cc:
2788         Likewise.
2789
2790 2021-08-03  Jonathan Wakely  <jwakely@redhat.com>
2791
2792         * doc/xml/manual/evolution.xml: Document deprecation.
2793         * doc/html/*: Regenerate.
2794         * include/bits/c++config (_GLIBCXX14_DEPRECATED): Define.
2795         (_GLIBCXX14_DEPRECATED_SUGGEST): Define.
2796         * include/bits/stl_algo.h (random_shuffle): Deprecate for C++14
2797         and later.
2798         * testsuite/25_algorithms/headers/algorithm/synopsis.cc: Adjust
2799         for C++11 and C++14 changes to std::random_shuffle and
2800         std::shuffle.
2801         * testsuite/25_algorithms/random_shuffle/1.cc: Add options to
2802         use deprecated algorithms.
2803         * testsuite/25_algorithms/random_shuffle/59603.cc: Likewise.
2804         * testsuite/25_algorithms/random_shuffle/moveable.cc: Likewise.
2805         * testsuite/25_algorithms/random_shuffle/requirements/explicit_instantiation/2.cc:
2806         Likewise.
2807         * testsuite/25_algorithms/random_shuffle/requirements/explicit_instantiation/pod.cc:
2808         Likewise.
2809
2810 2021-08-03  Jonathan Wakely  <jwakely@redhat.com>
2811
2812         * testsuite/23_containers/forward_list/operations/3.cc:
2813         Use lambda instead of std::bind2nd.
2814         * testsuite/20_util/function_objects/binders/3113.cc: Add
2815         options for testing deprecated features.
2816         * testsuite/20_util/pair/cons/99957.cc: Likewise.
2817         * testsuite/20_util/shared_ptr/assign/auto_ptr.cc: Likewise.
2818         * testsuite/20_util/shared_ptr/assign/auto_ptr_neg.cc: Likewise.
2819         * testsuite/20_util/shared_ptr/assign/auto_ptr_rvalue.cc:
2820         Likewise.
2821         * testsuite/20_util/shared_ptr/cons/43820_neg.cc: Likewise.
2822         * testsuite/20_util/shared_ptr/cons/auto_ptr.cc: Likewise.
2823         * testsuite/20_util/shared_ptr/cons/auto_ptr_neg.cc: Likewise.
2824         * testsuite/20_util/shared_ptr/creation/dr925.cc: Likewise.
2825         * testsuite/20_util/unique_ptr/cons/auto_ptr.cc: Likewise.
2826         * testsuite/20_util/unique_ptr/cons/auto_ptr_neg.cc: Likewise.
2827         * testsuite/ext/pb_ds/example/priority_queue_erase_if.cc:
2828         Likewise.
2829         * testsuite/ext/pb_ds/example/priority_queue_split_join.cc:
2830         Likewise.
2831         * testsuite/lib/dg-options.exp (dg_add_options_using-deprecated):
2832         New proc.
2833
2834 2021-08-03  Jonathan Wakely  <jwakely@redhat.com>
2835
2836         * include/bits/regex_executor.h (_State_info): Replace
2837         unique_ptr<bool[]> with array of bool.
2838         * include/bits/regex_executor.tcc: Likewise.
2839         * include/bits/regex_scanner.tcc: Replace std::strchr with
2840         __builtin_strchr.
2841         * include/std/regex: Replace standard headers with smaller
2842         internal ones.
2843         * testsuite/28_regex/traits/char/lookup_classname.cc: Include
2844         <string.h> for strlen.
2845         * testsuite/28_regex/traits/char/lookup_collatename.cc:
2846         Likewise.
2847
2848 2021-08-03  Jonathan Wakely  <jwakely@redhat.com>
2849
2850         * include/bits/locale_conv.h (__detail::_Scoped_ptr): Define new
2851         RAII class template.
2852         (wstring_convert, wbuffer_convert): Use __detail::_Scoped_ptr
2853         instead of unique_ptr.
2854
2855 2021-08-02  Patrick Palka  <ppalka@redhat.com>
2856
2857         PR libstdc++/101599
2858         * include/bits/ranges_algo.h (__reverse_copy_fn::operator()):
2859         Add missing std::move in return statement.
2860         (__partition_copy_fn::operator()): Rename templtae parameter
2861         _O2 to _Out2.  Uglify function parameters out_true and out_false.
2862         * include/bits/ranges_algobase.h (__copy_or_move): Add missing
2863         std::move to recursive call that unwraps a __normal_iterator
2864         output iterator.
2865         * testsuite/25_algorithms/copy/constrained.cc (test06): New test.
2866         * testsuite/25_algorithms/move/constrained.cc (test05): New test.
2867
2868 2021-08-02  Patrick Palka  <ppalka@redhat.com>
2869
2870         PR libstdc++/101589
2871         * include/std/ranges (lazy_split_view::_InnerIter::base): Make
2872         the const& overload unconstrained and return a const reference
2873         as per LWG 3533.  Make unconditionally noexcept.
2874         (elements_view::base): Revert accidental r12-569 change.
2875         (elements_view::_Iterator::base): Make the const& overload
2876         unconstrained and return a const reference as per LWG 3533.
2877         Make unconditionally noexcept.
2878
2879 2021-08-02  Patrick Palka  <ppalka@redhat.com>
2880
2881         PR libstdc++/101483
2882         * include/std/ranges (join_view::_Iterator::_Iterator): Add
2883         missing std::move.
2884
2885 2021-08-02  Jonathan Wakely  <jwakely@redhat.com>
2886
2887         PR libstdc++/101709
2888         * src/filesystem/ops-common.h (get_temp_directory_from_env):
2889         Add error_code parameter.
2890         * src/c++17/fs_ops.cc (fs::temp_directory_path): Pass error_code
2891         argument to get_temp_directory_from_env and check it.
2892         * src/filesystem/ops.cc (fs::temp_directory_path): Likewise.
2893
2894 2021-08-02  Jonathan Wakely  <jwakely@redhat.com>
2895
2896         * testsuite/20_util/tuple/comparison_operators/overloaded2.cc:
2897         Add dg-error for c++11_only target.
2898
2899 2021-07-30  Jonathan Wakely  <jwakely@redhat.com>
2900
2901         PR libstdc++/65018
2902         * configure.ac: Check for secure_getenv.
2903         * config.h.in: Regenerate.
2904         * configure: Regenerate.
2905         * src/filesystem/ops-common.h (get_temp_directory_from_env): New
2906         helper function to obtain path from the environment.
2907         * src/c++17/fs_ops.cc (fs::temp_directory_path): Use new helper.
2908         * src/filesystem/ops.cc (fs::temp_directory_path): Likewise.
2909         * testsuite/27_io/filesystem/operations/temp_directory_path.cc:
2910         Print messages if test cannot be run.
2911         * testsuite/experimental/filesystem/operations/temp_directory_path.cc:
2912         Likewise. Fix incorrect condition. Use "TMP" to work with
2913         Windows as well as POSIX.
2914
2915 2021-07-29  Hans-Peter Nilsson  <hp@bitrange.com>
2916
2917         * src/c++17/memory_resource.cc: Use __exchange instead
2918         of std::exchange.
2919
2920 2021-07-27  Jonathan Wakely  <jwakely@redhat.com>
2921
2922         * include/experimental/optional (__throw_bad_optional_access):
2923         Replace GNU attribute with C++11 attribute.
2924         (optional::value, optional::value_or): Use if statements
2925         instead of conditional expressions.
2926         * include/std/optional (__throw_bad_optional_access)
2927         (optional::value, optional::value_or): Likewise.
2928
2929 2021-07-27  Marek Polacek  <polacek@redhat.com>
2930
2931         DR 1512
2932         PR c++/99701
2933         * testsuite/20_util/tuple/comparison_operators/overloaded.cc:
2934         Move a line...
2935         * testsuite/20_util/tuple/comparison_operators/overloaded2.cc:
2936         ...here.  New test.
2937
2938 2021-07-27  Jonathan Wakely  <jwakely@redhat.com>
2939
2940         * include/bits/cow_string.h: Consistently use tab for
2941         indentation.
2942
2943 2021-07-27  Jonathan Wakely  <jwakely@redhat.com>
2944
2945         * include/Makefile.am: Add new header.
2946         * include/Makefile.in: Regenerate.
2947         * include/bits/basic_string.h [!_GLIBCXX_USE_CXX11_ABI]
2948         (basic_string): Move definition of Copy-on-Write string to
2949         new file.
2950         * include/bits/basic_string.tcc: Likewise.
2951         * include/bits/cow_string.h: New file.
2952
2953 2021-07-27  Jonathan Wakely  <jwakely@redhat.com>
2954
2955         * include/std/algorithm: Do not include <utility>.
2956         * include/std/functional: Likewise.
2957         * include/std/regex: Include <bits/stl_pair.h> instead of
2958         <utility>.
2959         * include/debug/map.h: Likewise.
2960         * include/debug/multimap.h: Likewise.
2961         * include/debug/multiset.h: Likewise.
2962         * include/debug/set.h: Likewise.
2963         * include/debug/vector: Likewise.
2964         * include/bits/fs_path.h: Likewise.
2965         * include/bits/unique_ptr.h: Do not include <utility>.
2966         * include/experimental/any: Likewise.
2967         * include/experimental/executor: Likewise.
2968         * include/experimental/memory: Likewise.
2969         * include/experimental/optional: Likewise.
2970         * include/experimental/socket: Use __exchange instead
2971         of std::exchange.
2972         * src/filesystem/ops-common.h: Likewise.
2973         * testsuite/20_util/default_delete/48631_neg.cc: Adjust expected
2974         errors to not use a hardcoded line number.
2975         * testsuite/20_util/default_delete/void_neg.cc: Likewise.
2976         * testsuite/20_util/specialized_algorithms/uninitialized_copy/constrained.cc:
2977         Include <utility> for std::as_const.
2978         * testsuite/20_util/specialized_algorithms/uninitialized_default_construct/constrained.cc:
2979         Likewise.
2980         * testsuite/20_util/specialized_algorithms/uninitialized_move/constrained.cc:
2981         Likewise.
2982         * testsuite/20_util/specialized_algorithms/uninitialized_value_construct/constrained.cc:
2983         Likewise.
2984         * testsuite/23_containers/vector/cons/destructible_debug_neg.cc:
2985         Adjust dg-error line number.
2986
2987 2021-07-27  Jonathan Wakely  <jwakely@redhat.com>
2988
2989         * include/Makefile.am: Add bits/utility.h header.
2990         * include/Makefile.in: Regenerate.
2991         * include/bits/utility.h: New file.
2992         * include/std/utility (tuple_size, tuple_element): Move
2993         to new header.
2994         * include/std/type_traits (__is_tuple_like_impl<tuple<T...>>):
2995         Move to <tuple>.
2996         (_Index_tuple, _Build_index_tuple, integer_sequence): Likewise.
2997         (in_place_t, in_place_index_t, in_place_type_t): Likewise.
2998         * include/bits/ranges_util.h: Include new header instead of
2999         <utility>.
3000         * include/bits/stl_pair.h (tuple_size, tuple_element): Move
3001         partial specializations for std::pair here.
3002         (get): Move overloads for std::pair here.
3003         * include/std/any: Include new header instead of <utility>.
3004         * include/std/array: Likewise.
3005         * include/std/memory_resource: Likewise.
3006         * include/std/optional: Likewise.
3007         * include/std/variant: Likewise.
3008         * include/std/tuple: Likewise.
3009         (__is_tuple_like_impl<tuple<T...>>): Move here.
3010         (get) Declare overloads for std::array.
3011         * include/std/version (__cpp_lib_tuples_by_type): Change type
3012         to long.
3013         * testsuite/20_util/optional/84601.cc: Include <utility>.
3014         * testsuite/20_util/specialized_algorithms/uninitialized_fill/constrained.cc:
3015         Likewise.
3016         * testsuite/23_containers/array/tuple_interface/get_neg.cc:
3017         Adjust dg-error line numbers.
3018         * testsuite/std/ranges/access/cbegin.cc: Include <utility>.
3019         * testsuite/std/ranges/access/cend.cc: Likewise.
3020         * testsuite/std/ranges/access/end.cc: Likewise.
3021         * testsuite/std/ranges/single_view.cc: Likewise.
3022
3023 2021-07-23  Jonathan Wakely  <jwakely@redhat.com>
3024
3025         * include/std/future: Include <bits/atomic_base.h> instead of
3026         <atomic>.
3027
3028 2021-07-23  Jonathan Wakely  <jwakely@redhat.com>
3029
3030         * include/bits/stl_relops.h: Update documentation comments.
3031
3032 2021-07-22  Jonathan Wakely  <jwakely@redhat.com>
3033
3034         PR libstdc++/101583
3035         * include/bits/hashtable.h (_Hashtable): Replace mixin with
3036         _Enable_default_ctor. Construct it explicitly in all
3037         non-forwarding, non-defaulted constructors.
3038         * testsuite/23_containers/unordered_map/cons/default.cc: Check
3039         non-default constructors can be used.
3040         * testsuite/23_containers/unordered_set/cons/default.cc:
3041         Likewise.
3042
3043 2021-07-22  David Edelsohn  <dje.gcc@gmail.com>
3044
3045         * config/os/aix/os_defines.h (__LIBC_NO_CPP_MATH_OVERLOADS__): Define.
3046
3047 2021-07-22  Jonathan Wakely  <jwakely@redhat.com>
3048
3049         PR libstdc++/94295
3050         * include/ext/new_allocator.h (_GLIBCXX_OPERATOR_NEW)
3051         (_GLIBCXX_OPERATOR_DELETE, _GLIBCXX_SIZED_DEALLOC): Define.
3052         (allocator::allocate, allocator::deallocate): Use new macros.
3053
3054 2021-07-22  Jonathan Wakely  <jwakely@redhat.com>
3055
3056         PR libstdc++/101571
3057         * include/bits/ranges_uninitialized.h (_DestroyGuard): Change
3058         constructor parameter to reference and use addressof.
3059         * testsuite/util/testsuite_iterators.h: Define deleted operator&
3060         overloads for test iterators.
3061
3062 2021-07-22  Jonathan Wakely  <jwakely@redhat.com>
3063
3064         * include/bits/std_function.h (_Function_base): Add
3065         default member initializers and define constructor as defaulted.
3066         (function::_M_invoker): Add default member initializer.
3067
3068 2021-07-22  Jonathan Wakely  <jwakely@redhat.com>
3069
3070         PR libstdc++/100682
3071         * doc/xml/manual/debug_mode.xml: Update documentation about
3072         debug capability of std::array.
3073         * doc/html/*: Regenerate.
3074         * include/debug/array: New file.
3075
3076 2021-07-21  Jonathan Wakely  <jwakely@redhat.com>
3077
3078         PR libstdc++/101542
3079         * include/ext/rope (sequence_buffer): Add move constructor and
3080         move assignment operator.
3081         * testsuite/ext/rope/101542.cc: New test.
3082
3083 2021-07-20  Jonathan Wakely  <jwakely@redhat.com>
3084
3085         PR libstdc++/101510
3086         * src/c++17/fs_ops.cc (fs::create_directories): Use status
3087         instead of symlink_status.
3088         * src/filesystem/ops.cc (fs::create_directories): Likewise.
3089         * testsuite/27_io/filesystem/operations/create_directories.cc:
3090         Check symlink to existing directory.
3091         * testsuite/27_io/filesystem/operations/create_directory.cc: Do
3092         not test with symlinks on Windows.
3093         * testsuite/experimental/filesystem/operations/create_directories.cc:
3094         Check symlink to existing directory.
3095         * testsuite/experimental/filesystem/operations/create_directory.cc:
3096         Do not test with symlinks on Windows.
3097
3098 2021-07-20  Jonathan Wakely  <jwakely@redhat.com>
3099
3100         PR libstdc++/100863
3101         * include/bits/hashtable.h (_Hashtable): Conditionally delete
3102         default constructor by deriving from _Enable_special_members.
3103         * testsuite/23_containers/unordered_map/cons/default.cc: New test.
3104         * testsuite/23_containers/unordered_set/cons/default.cc: New test.
3105
3106 2021-07-20  Jonathan Wakely  <jwakely@redhat.com>
3107
3108         PR libstdc++/101510
3109         * src/c++17/fs_ops.cc (create_dir): Adjust whitespace.
3110         * testsuite/27_io/filesystem/operations/create_directory.cc:
3111         Test creating directory with name of existing symlink to
3112         directory.
3113         * testsuite/experimental/filesystem/operations/create_directory.cc:
3114         Likewise.
3115
3116 2021-07-16  Jonathan Wakely  <jwakely@redhat.com>
3117
3118         * include/std/tuple (get<I>): Add deleted overload for bad
3119         index.
3120         * testsuite/20_util/tuple/element_access/get_neg.cc: Adjust
3121         expected errors.
3122
3123 2021-07-16  Jonathan Wakely  <jwakely@redhat.com>
3124
3125         * include/bits/max_size_type.h (numeric_limits<__max_size_type>):
3126         Use __int_traits unconditionally.
3127
3128 2021-07-16  Jonathan Wakely  <jwakely@redhat.com>
3129
3130         * include/bits/random.h (_Shift::__value): Use constexpr.
3131         (_Select_uint_least_t::type): Use using-declaration.
3132         (_Mod): Likewise.
3133         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error
3134         line number.
3135
3136 2021-07-16  Jonathan Wakely  <jwakely@redhat.com>
3137
3138         * include/bits/cpp_type_traits.h (__INT_N): Use __extension__
3139         instead of diagnostic pragmas.
3140         * include/bits/functional_hash.h: Likewise.
3141         * include/bits/iterator_concepts.h (__is_signed_int128)
3142         (__is_unsigned_int128): Likewise.
3143         * include/bits/max_size_type.h (__max_size_type): Likewise.
3144         (numeric_limits<__max_size_type>): Likewise.
3145         * include/bits/std_abs.h (abs): Likewise.
3146         * include/bits/stl_algobase.h (__size_to_integer): Likewise.
3147         * include/bits/uniform_int_dist.h (uniform_int_distribution):
3148         Likewise.
3149         * include/ext/numeric_traits.h (_GLIBCXX_INT_N_TRAITS):
3150         Likewise.
3151         * include/std/type_traits (__is_integral_helper<INT_N>)
3152         (__is_signed_integer, __is_unsigned_integer)
3153         (__make_unsigned<INT_N>, __make_signed<INT_N>): Likewise.
3154         * include/std/limits (__INT_N): Add __extension__ keyword.
3155         * include/bits/random.h (_Select_uint_least_t)
3156         (random_device): Likewise.
3157
3158 2021-07-16  Patrick Palka  <ppalka@redhat.com>
3159
3160         PR libstdc++/101231
3161         * include/std/ranges (_CachedPosition::_M_get): For non-forward
3162         ranges, just call __builtin_unreachable.
3163         * testsuite/std/ranges/istream_view.cc (test05): New test.
3164
3165 2021-07-16  Patrick Palka  <ppalka@redhat.com>
3166
3167         PR libstdc++/101214
3168         * include/std/ranges (split_view::split_view): Use std::move.
3169         (split_view::_Iterator::_Iterator): Remove redundant
3170         default_initializable constraint.
3171         (split_view::_Sentinel::_Sentinel): Declare.
3172         * testsuite/std/ranges/adaptors/split.cc (test02): New test.
3173
3174 2021-07-16  Marek Polacek  <polacek@redhat.com>
3175
3176         * testsuite/20_util/ratio/operations/ops_overflow_neg.cc: Add
3177         dg-error.
3178
3179 2021-07-16  Jonathan Wakely  <jwakely@redhat.com>
3180
3181         * include/bits/unique_ptr.h: Adjust doxygen markup.
3182
3183 2021-07-16  Jonathan Wakely  <jwakely@redhat.com>
3184
3185         PR libstdc++/101307
3186         * include/std/type_traits: Adjust doxygen markup.
3187
3188 2021-07-16  Jonathan Wakely  <jwakely@redhat.com>
3189
3190         * include/bits/cpp_type_traits.h: Add diagnostic pragmas around
3191         uses of non-standard integer types.
3192         * include/bits/functional_hash.h: Likewise.
3193         * include/bits/iterator_concepts.h: Likewise.
3194         * include/bits/max_size_type.h: Likewise.
3195         * include/bits/std_abs.h: Likewise.
3196         * include/bits/stl_algobase.h: Likewise.
3197         * include/bits/uniform_int_dist.h: Likewise.
3198         * include/ext/numeric_traits.h: Likewise.
3199         * include/std/type_traits: Likewise.
3200
3201 2021-07-15  Jonathan Wakely  <jwakely@redhat.com>
3202
3203         PR libstdc++/101427
3204         * include/std/tuple (tuple_element): Improve static_assert text.
3205         (__get_helper): Add deleted overload.
3206         (get<i>(tuple<T...>&&), get<i>(const tuple<T...>&&)): Use
3207         __get_helper directly.
3208         (__get_helper2): Remove.
3209         (__find_uniq_type_in_pack): New constexpr helper function.
3210         (get<T>): Use __find_uniq_type_in_pack and __get_helper instead
3211         of __get_helper2.
3212         * testsuite/20_util/tuple/element_access/get_neg.cc: Adjust
3213         expected errors.
3214         * testsuite/20_util/tuple/element_access/101427.cc: New test.
3215
3216 2021-07-15  Jonathan Wakely  <jwakely@redhat.com>
3217
3218         PR libstdc++/101429
3219         * include/bits/c++config (__replacement_assert): Add noexcept.
3220         [!_GLIBCXX_VERBOSE] (__glibcxx_assert_impl): Use __builtin_abort
3221         instead of __replacement_assert.
3222
3223 2021-07-14  Jonathan Wakely  <jwakely@redhat.com>
3224
3225         * include/std/string_view (basic_string_view(It, End)): Add
3226         noexcept-specifier.
3227         * testsuite/21_strings/basic_string_view/cons/char/range.cc:
3228         Check noexcept-specifier. Also check construction without CTAD.
3229
3230 2021-07-13  Jonathan Wakely  <jwakely@redhat.com>
3231
3232         PR c++/101361
3233         * include/std/string_view (ends_with): Use traits_type::compare
3234         directly.
3235
3236 2021-07-13  Jonathan Wakely  <jwakely@redhat.com>
3237
3238         * include/std/string_view: Only include <bits/ranges_base.h>
3239         once, and only for C++20 and later.
3240
3241 2021-07-12  Jonathan Wakely  <jwakely@redhat.com>
3242
3243         PR libstdc++/101411
3244         * include/std/span (as_writable_bytes): Add requires-clause.
3245         * testsuite/23_containers/span/101411.cc: New test.
3246
3247 2021-07-09  Matheus Castanho  <msc@linux.ibm.com>
3248
3249         * include/std/mutex (__lock_impl): Check
3250         _GLIBCXX_HAS_GTHREADS before using __gthread_yield.
3251
3252 2021-07-02  Jonathan Wakely  <jwakely@redhat.com>
3253
3254         PR libstdc++/101271
3255         * include/bits/unique_ptr.h (unique_ptr<T[],D>::operator[]):
3256         Remove noexcept-specifier.
3257         (unique_ptr<T[],D>::_S_nothrow_deref): Remove.
3258         * testsuite/20_util/unique_ptr/lwg2762.cc: Remove checks for
3259         operator[].
3260
3261 2021-07-01  Jonathan Wakely  <jwakely@redhat.com>
3262
3263         * doc/doxygen/doxygroups.cc: Fix docs for std::literals.
3264         * doc/doxygen/user.cfg.in: Exclude the Networking TS header.
3265         Add some more predefined macros.
3266         * include/bits/fs_fwd.h: Move @addtogroup commands inside
3267         namespaces. Add better documentation.
3268         * include/bits/fs_path.h: Likewise.
3269         * include/experimental/bits/fs_fwd.h: Likewise.
3270         * include/experimental/bits/fs_path.h: Likewise.
3271         * include/ext/throw_allocator.h: Fix typo and improve docs.
3272         * include/std/chrono: Move @addtogroup commands.
3273         * include/std/system_error: Move @addtogroup commands.
3274         * libsupc++/exception: Improve documentation.
3275         * libsupc++/exception.h: Add @since documentation.
3276
3277 2021-06-30  Jonathan Wakely  <jwakely@redhat.com>
3278
3279         PR libstdc++/101258
3280         * doc/doxygen/user.cfg.in (INPUT): Add <experimental/simd>.
3281         (COLS_IN_ALPHA_INDEX): Remove obsolete tag.
3282         (PREDEFINED): Add/fix some more macros that need to be expanded.
3283         * include/bits/random.h: Stop Doxygen from documenting internal
3284         implementation details.
3285         * include/bits/random.tcc: Likewise.
3286         * include/bits/this_thread_sleep.h: Fix @file name.
3287         * include/experimental/bits/simd.h: Add to Doxygen group. Do not
3288         document internal implementation details.
3289         * include/experimental/bits/simd_detail.h: Do not document
3290         internal implementation details.
3291         * include/experimental/simd: Define Doxygen groups.
3292         * include/experimental/type_traits: Improve documentation for
3293         the header file. Define groups. Use @since commands.
3294         * include/std/scoped_allocator (scoped_allocator_adaptor): Move
3295         declaration before undocumented region.
3296         * include/std/type_traits (true_type, false_type): Use using
3297         declaration instead of typedef.
3298         (is_invocable_v, is_nothrow_invocable_v, is_invocable_r_v)
3299         (is_nothrow_invocable_r_v): Move definitions next to other C++17
3300         variable templates.
3301         Do not document internal implementation details. Move misplaced
3302         group-end command. Define group for variable templates.
3303         * include/std/variant: Do not document internal implementation
3304         details.
3305         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error
3306         line number.
3307
3308 2021-06-30  Jonathan Wakely  <jwakely@redhat.com>
3309
3310         * include/experimental/simd: Do not define anything pre-C++17.
3311
3312 2021-06-30  Jonathan Wakely  <jwakely@redhat.com>
3313
3314         * include/bits/random.tcc [__cpp_inline_variables]: Remove
3315         redundant definitions of static constexpr member variables.
3316         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error
3317         line number.
3318
3319 2021-06-28  Jonathan Wakely  <jwakely@redhat.com>
3320
3321         * include/bits/streambuf.tcc (__copy_streambufs_eof): Remove
3322         explicit instantiation declarations.
3323         * src/c++11/streambuf-inst.cc (__copy_streambufs_eof): Remove
3324         explicit instantiation definitions.
3325
3326 2021-06-28  Jonathan Wakely  <jwakely@redhat.com>
3327
3328         PR libstdc++/97088
3329         * testsuite/17_intro/names.cc: Fix #if condition for names used
3330         by newlib headers.
3331
3332 2021-06-28  Jonathan Wakely  <jwakely@redhat.com>
3333
3334         PR libstdc++/101236
3335         * include/bits/unique_ptr.h (unique_ptr<T[], D>::operator[]):
3336         Fail gracefully if element_type is incomplete.
3337         * testsuite/20_util/unique_ptr/cons/incomplete.cc: Clarify that
3338         the standard doesn't require this test to work for array types.
3339         * testsuite/20_util/unique_ptr/lwg2762.cc: Check that incomplete
3340         types can be used with array specialization.
3341         * testsuite/20_util/unique_ptr/101236.cc: New test.
3342
3343 2021-06-28  Jonathan Wakely  <jwakely@redhat.com>
3344
3345         * doc/xml/manual/intro.xml: Document LWG 415 change.
3346         * doc/html/manual/bugs.html: Regenerate.
3347         * include/bits/istream.tcc (ws): Create sentry and catch
3348         exceptions.
3349         * testsuite/27_io/basic_istream/ws/char/lwg415.cc: New test.
3350         * testsuite/27_io/basic_istream/ws/wchar_t/lwg415.cc: New test.
3351
3352 2021-06-25  Jonathan Wakely  <jwakely@redhat.com>
3353
3354         * include/bits/ostream.tcc (basic_ostream::write): Call sputn
3355         directly instead of using _M_write. Do setstate(__err) all
3356         outside the try-catch block.
3357         * include/std/ostream (basic_ostream::_M_write): Declare
3358         private. Use __ostream_insert. Do not define for the versioned
3359         namespace.
3360
3361 2021-06-25  Jonathan Wakely  <jwakely@redhat.com>
3362
3363         * doc/xml/manual/intro.xml: Document LWG 581 change.
3364         * doc/html/manual/bugs.html: Regenerate.
3365         * include/bits/basic_ios.tcc: Whitespace.
3366         * include/bits/ostream.tcc (basic_ostream::flush()): Construct
3367         sentry.
3368         * testsuite/27_io/basic_ostream/flush/char/2.cc: Check
3369         additional cases.
3370         * testsuite/27_io/basic_ostream/flush/char/exceptions_badbit_throw.cc:
3371         Likewise.
3372         * testsuite/27_io/basic_ostream/flush/wchar_t/2.cc: Likewise.
3373         * testsuite/27_io/basic_ostream/flush/wchar_t/exceptions_badbit_throw.cc:
3374         Likewise.
3375
3376 2021-06-25  Jonathan Wakely  <jwakely@redhat.com>
3377
3378         * include/bits/ostream.tcc (sentry): Only set failbit if badbit
3379         is set, not if eofbit is set.
3380         (tellp, seekp, seekp): Create sentry object. Do not set badbit
3381         on exceptions.
3382         * testsuite/27_io/basic_ostream/seekp/char/exceptions_badbit_throw.cc:
3383         Adjust expected behaviour.
3384         * testsuite/27_io/basic_ostream/seekp/wchar_t/exceptions_badbit_throw.cc:
3385         Likewise.
3386         * testsuite/27_io/basic_ostream/tellp/char/exceptions_badbit_throw.cc:
3387         Likewise.
3388         * testsuite/27_io/basic_ostream/tellp/wchar_t/exceptions_badbit_throw.cc:
3389         Likewise.
3390         * testsuite/27_io/basic_ostream/seekp/char/n3168.cc: New test.
3391         * testsuite/27_io/basic_ostream/seekp/wchar_t/n3168.cc: New test.
3392         * testsuite/27_io/basic_ostream/tellp/char/n3168.cc: New test.
3393         * testsuite/27_io/basic_ostream/tellp/wchar_t/n3168.cc: New test.
3394
3395 2021-06-25  Jonathan Wakely  <jwakely@redhat.com>
3396
3397         * include/std/syncstream (basic_syncbuf::swap()): Remove
3398         noexcept, as per LWG 3498.
3399
3400 2021-06-25  Jonathan Wakely  <jwakely@redhat.com>
3401
3402         PR libstdc++/97088
3403         * testsuite/17_intro/names.cc: Undef more names for newlib and
3404         also for arm-none-linux-gnueabi.
3405         * testsuite/experimental/names.cc: Disable PCH.
3406
3407 2021-06-25  Matthias Kretz  <m.kretz@gsi.de>
3408
3409         * include/experimental/bits/simd.h (__bit_cast): Implement via
3410         __builtin_bit_cast #if available.
3411         (__proposed::simd_bit_cast): Add overloads for simd and
3412         simd_mask, which use __builtin_bit_cast (or __bit_cast #if not
3413         available), which return an object of the requested type with
3414         the same bits as the argument.
3415         * include/experimental/bits/simd_math.h: Use simd_bit_cast
3416         instead of __bit_cast to allow casts to fixed_size_simd.
3417         (copysign): Remove branch that was only required if __bit_cast
3418         cannot be constexpr.
3419         * testsuite/experimental/simd/tests/bits/test_values.h: Switch
3420         from __bit_cast to __proposed::simd_bit_cast since the former
3421         will not cast fixed_size objects anymore.
3422
3423 2021-06-24  Matthias Kretz  <m.kretz@gsi.de>
3424
3425         * include/experimental/bits/simd_math.h
3426         (_GLIBCXX_SIMD_MATH_CALL2_): Rename arg2_ to __arg2.
3427         (_GLIBCXX_SIMD_MATH_CALL3_): Rename arg2_ to __arg2 and arg3_ to
3428         __arg3.
3429
3430 2021-06-24  Matthias Kretz  <m.kretz@gsi.de>
3431
3432         * include/experimental/bits/simd.h (__execute_on_index_sequence)
3433         (__execute_on_index_sequence_with_return)
3434         (__call_with_n_evaluations, __call_with_subscripts): Add flatten
3435         attribute.
3436
3437 2021-06-24  Matthias Kretz  <m.kretz@gsi.de>
3438
3439         * include/experimental/bits/simd_x86.h (_S_trunc, _S_floor)
3440         (_S_ceil): Set bit 8 (_MM_FROUND_NO_EXC) on AVX and SSE4.1
3441         roundp[sd] calls.
3442
3443 2021-06-24  Matthias Kretz  <m.kretz@gsi.de>
3444
3445         * include/experimental/bits/simd_x86.h (_S_ldexp): The AVX512F
3446         implementation doesn't require a _VecBltnBtmsk ABI tag, it
3447         requires either a 64-Byte input (in which case AVX512F must be
3448         available) or AVX512VL.
3449
3450 2021-06-24  Matthias Kretz  <m.kretz@gsi.de>
3451
3452         * include/experimental/bits/simd_math.h: Undefine internal
3453         macros after use.
3454         (frexp): Move #if to a more sensible position and reformat
3455         preceding code.
3456         (logb): Call _SimdImpl::_S_logb for fixed_size instead of
3457         duplicating the code here.
3458         (modf): Simplify condition.
3459
3460 2021-06-24  Matthias Kretz  <m.kretz@gsi.de>
3461
3462         * include/experimental/bits/simd_math.h (fabs): Remove
3463         fabs(simd<integral>) overload.
3464
3465 2021-06-24  Matthias Kretz  <m.kretz@gsi.de>
3466
3467         * include/experimental/bits/simd_converter.h
3468         (_SimdConverter::operator()): Pass _SimdTuple by const-ref.
3469         * include/experimental/bits/simd_fixed_size.h
3470         (_GLIBCXX_SIMD_FIXED_OP): Pass binary operator _SimdTuple
3471         arguments by const-ref.
3472         (_S_masked_unary): Pass _SimdTuple by const-ref.
3473
3474 2021-06-24  Matthias Kretz  <m.kretz@gsi.de>
3475
3476         * include/experimental/bits/simd_fixed_size.h
3477         (_AbisInSimdTuple): Removed.
3478
3479 2021-06-24  Matthias Kretz  <m.kretz@gsi.de>
3480
3481         * include/experimental/bits/simd.h: Add missing operator~
3482         overload for simd<floating-point> to __float_bitwise_operators.
3483         * include/experimental/bits/simd_builtin.h
3484         (_SimdImplBuiltin::_S_complement): Bitcast to int (and back) to
3485         implement complement for floating-point vectors.
3486         * include/experimental/bits/simd_fixed_size.h
3487         (_SimdImplFixedSize::_S_copysign): New function, forwarding to
3488         copysign implementation of _SimdTuple members.
3489         * include/experimental/bits/simd_math.h (copysign): Call
3490         _SimdImpl::_S_copysign for fixed_size arguments. Simplify
3491         generic copysign implementation using the new ~ operator.
3492
3493 2021-06-24  Jonathan Wakely  <jwakely@redhat.com>
3494
3495         * testsuite/experimental/simd/README.md: Fix typos.
3496
3497 2021-06-24  Jonathan Wakely  <jwakely@redhat.com>
3498
3499         * include/bits/shared_ptr_base.h (__shared_ptr_access::operator[]):
3500         Add noexcept.
3501         * include/bits/unique_ptr.h (unique_ptr::operator*): Add
3502         conditional noexcept as per LWG 2762.
3503         * testsuite/20_util/shared_ptr/observers/array.cc: Check that
3504         dereferencing cannot throw.
3505         * testsuite/20_util/shared_ptr/observers/get.cc: Likewise.
3506         * testsuite/20_util/optional/observers/lwg2762.cc: New test.
3507         * testsuite/20_util/unique_ptr/lwg2762.cc: New test.
3508
3509 2021-06-23  Patrick Palka  <ppalka@redhat.com>
3510
3511         PR c++/101174
3512         * testsuite/23_containers/multiset/cons/deduction.cc:
3513         Uncomment CTAD example that was rejected by this bug.
3514         * testsuite/23_containers/set/cons/deduction.cc: Likewise.
3515
3516 2021-06-23  Jonathan Wakely  <jwakely@redhat.com>
3517
3518         * include/std/chrono (chrono::year::is_leap()): Fix incorrect
3519         logic in comment.
3520
3521 2021-06-23  Matthias Kretz  <m.kretz@gsi.de>
3522
3523         * testsuite/experimental/simd/README.md: New file.
3524
3525 2021-06-23  Matthias Kretz  <m.kretz@gsi.de>
3526
3527         * testsuite/experimental/simd/driver.sh: Rewrite output
3528         verbosity logic. Add -p/--percentage option. Allow -v/--verbose
3529         to be used twice. Add -x and -o short options. Parse long
3530         options with = instead of separating space generically. Parce
3531         contracted short options. Make unrecognized options an error.
3532         If same-line output is active, trap on EXIT to increment the
3533         progress (only with --percentage), erase the line and print the
3534         current status.
3535         * testsuite/experimental/simd/generate_makefile.sh: Initialize
3536         helper files for progress account keeping. Update help target
3537         for changes to DRIVEROPTS.
3538
3539 2021-06-23  Matthias Kretz  <m.kretz@gsi.de>
3540
3541         * testsuite/Makefile.am (check-simd): Remove -fno-tree-vrp flag
3542         and associated warning.
3543         * testsuite/Makefile.in: Regenerate.
3544
3545 2021-06-23  Cassio Neri  <cassio.neri@gmail.com>
3546             Jonathan Wakely  <jwakely@redhat.com>
3547             Ulrich Drepper  <drepper@redhat.com>
3548
3549         * include/std/chrono (chrono::year::is_leap()): Optimize.
3550
3551 2021-06-23  Patrick Palka  <ppalka@redhat.com>
3552
3553         PR c++/86439
3554         * testsuite/23_containers/map/cons/deduction.cc: Replace ambiguous
3555         CTAD examples.
3556         * testsuite/23_containers/multimap/cons/deduction.cc: Likewise.
3557         * testsuite/23_containers/multiset/cons/deduction.cc: Likewise.
3558         Mention one of the replaced examples is broken due to PR101174.
3559         * testsuite/23_containers/set/cons/deduction.cc: Likewise.
3560         * testsuite/23_containers/unordered_map/cons/deduction.cc: Replace
3561         ambiguous CTAD examples.
3562         * testsuite/23_containers/unordered_multimap/cons/deduction.cc:
3563         Likewise.
3564         * testsuite/23_containers/unordered_multiset/cons/deduction.cc:
3565         Likewise.
3566         * testsuite/23_containers/unordered_set/cons/deduction.cc: Likewise.
3567
3568 2021-06-23  Jonathan Wakely  <jwakely@redhat.com>
3569
3570         * include/std/mutex (__detail::__try_lock_impl): Rename
3571         parameter to avoid clashing with newlib's __lockable macro.
3572         (try_lock): Add 'inline' specifier.
3573         * testsuite/17_intro/names.cc: Add check for __lockable.
3574         * testsuite/30_threads/try_lock/5.cc: Add options for pthreads.
3575
3576 2021-06-22  Jonathan Wakely  <jwakely@redhat.com>
3577             Matthias Kretz  <m.kretz@gsi.de>
3578
3579         * include/std/mutex (lock): Replace recursion with iteration
3580         when lockables all have the same type.
3581         (__detail::__try_lock_impl): Likewise. Pass lockables as
3582         parameters, instead of a tuple. Always lock the first one, and
3583         recurse for the rest.
3584         (__detail::__lock_impl): Adjust call to __try_lock_impl.
3585         (__detail::__try_to_lock): Remove.
3586         * testsuite/30_threads/lock/3.cc: Check that mutexes are locked.
3587         * testsuite/30_threads/lock/4.cc: Also test non-heterogeneous
3588         arguments.
3589         * testsuite/30_threads/unique_lock/cons/60497.cc: Also check
3590         std::try_lock.
3591         * testsuite/30_threads/try_lock/5.cc: New test.
3592
3593 2021-06-22  Jonathan Wakely  <jwakely@redhat.com>
3594
3595         * include/std/memory (declare_reachable, undeclare_reachable)
3596         (declare_no_pointers, undeclare_no_pointers, get_pointer_safety)
3597         (pointer_safety): Only define for C++11 to C++20 inclusive.
3598         * testsuite/20_util/pointer_safety/1.cc: Do not run for C++23.
3599
3600 2021-06-22  Jonathan Wakely  <jwakely@redhat.com>
3601
3602         * include/bits/random.h (seed_seq): Constrain initializer-list
3603         constructor.
3604         * include/bits/random.tcc (seed_seq): Add template parameter.
3605         * testsuite/26_numerics/random/seed_seq/cons/default.cc: Check
3606         for noexcept.
3607         * testsuite/26_numerics/random/seed_seq/cons/initlist.cc: Check
3608         constraints.
3609
3610 2021-06-22  Thomas Rodgers  <rodgert@appliantology.com>
3611
3612         PR libstdc++/100806
3613         * include/bits/semaphore_base.h (__atomic_semaphore::_M_release):
3614         Force _M_release() to wake all waiting threads.
3615         * testsuite/30_threads/semaphore/100806.cc: New test.
3616
3617 2021-06-21  Jonathan Wakely  <jwakely@redhat.com>
3618
3619         * include/std/mutex (__try_to_lock): Move to __detail namespace.
3620         (struct __try_lock_impl): Replace with ...
3621         (__detail::__try_lock_impl<Idx>(tuple<Lockables...>&)): New
3622         function templates to implement std::try_lock.
3623         (try_lock): Use new __try_lock_impl.
3624         (__detail::__lock_impl(int, int&, L0&, L1&...)): New function
3625         template to implement std::lock.
3626         (lock): Use __lock_impl.
3627
3628 2021-06-21  Patrick Palka  <ppalka@redhat.com>
3629
3630         * include/bits/ranges_cmp.h (__cpp_lib_ranges): Adjust value.
3631
3632 2021-06-20  Patrick Palka  <ppalka@redhat.com>
3633
3634         * include/std/ranges (__non_propagating_cache::operator bool):
3635         Define for split_view::begin().
3636         (split_view): Define as per P2210.
3637         (views::__detail::__can_split_view): Define.
3638         (views::_Split, views::split): Define.
3639         * testsuite/std/ranges/adaptors/100577.cc (test01, test02):
3640         Test views::split.
3641         * testsuite/std/ranges/adaptors/split.cc: New test.
3642         * testsuite/std/ranges/p2325.cc (test08a): New test.
3643         * testsuite/std/ranges/p2367.cc (test01): Test views::split.
3644
3645 2021-06-20  Patrick Palka  <ppalka@redhat.com>
3646
3647         * include/std/ranges: Rename views::split to views::lazy_split,
3648         split_view to lazy_split_view, etc. throughout.
3649         * testsuite/std/ranges/*: Likewise.
3650         * testsuite/std/ranges/adaptors/lazy_split.cc: New file.
3651         * testsuite/std/ranges/adaptors/lazy_split_neg.cc: New file.
3652
3653 2021-06-20  Patrick Palka  <ppalka@redhat.com>
3654
3655         * include/std/ranges (split_view::_OuterIter::__at_end):
3656         Check _M_trailing_empty.
3657         (split_view::_OuterIter::_M_trailing_empty): Define this
3658         data member.
3659         (split_view::_OuterIter::operator++): Set _M_trailing_empty
3660         appropriately.
3661         (split_view::_OuterIter::operator==): Compare
3662         _M_trailing_empty.
3663         * testsuite/std/ranges/adaptors/100479.cc (test03): Expect two
3664         split parts instead of one.
3665         * testsuite/std/ranges/adaptors/split.cc (test11): New test.
3666
3667 2021-06-20  Patrick Palka  <ppalka@redhat.com>
3668
3669         * include/std/ranges (split_view::_InnerIter::base): Define as
3670         per P2210.
3671
3672 2021-06-19  Patrick Palka  <ppalka@redhat.com>
3673
3674         * include/std/ranges (transform_view::_Iterator::_S_iter_concept):
3675         Consider _Base instead of _Vp as per LWG 3555.
3676         (elements_view::_Iterator::_S_iter_concept): Likewise.
3677
3678 2021-06-19  Patrick Palka  <ppalka@redhat.com>
3679
3680         * include/std/ranges (split_view::_OuterIter::value_type::begin):
3681         Remove the non-const overload, and remove the copyable constraint
3682         on the const overload as per LWG 3553.
3683
3684 2021-06-19  Patrick Palka  <ppalka@redhat.com>
3685
3686         * include/bits/stl_iterator.h
3687         (__detail::__common_iter_use_postfix_proxy): Add
3688         move_constructible constraint as per LWG 3546.
3689         (common_iterator::__postfix_proxy): Adjust initializer of
3690         _M_keep as per LWG 3546.
3691
3692 2021-06-18  Patrick Palka  <ppalka@redhat.com>
3693
3694         PR libstdc++/100387
3695         * include/bits/ranges_algo.h (__minmax_fn::operator()): Rewrite
3696         to limit comparison complexity to 3*N/2.
3697         (__minmax_element_fn::operator()): Likewise.
3698         (shift_right): Avoid premature std::move of __result.
3699         * testsuite/25_algorithms/minmax/constrained.cc (test04, test05):
3700         New tests.
3701         * testsuite/25_algorithms/minmax_element/constrained.cc (test02):
3702         Likewise.
3703
3704 2021-06-18  Patrick Palka  <ppalka@redhat.com>
3705
3706         * include/std/concepts (convertible_to): Just use declval as per
3707         LWG 3557.
3708
3709 2021-06-18  Jonathan Wakely  <jwakely@redhat.com>
3710
3711         PR libstdc++/95833
3712         * include/std/numeric (reduce(Iter, Iter, T, BinaryOp)): Replace
3713         incorrect static_assert with ones matching the 'Mandates'
3714         conditions in the standard.
3715         * testsuite/26_numerics/reduce/95833.cc: New test.
3716
3717 2021-06-18  Jonathan Wakely  <jwakely@redhat.com>
3718
3719         * testsuite/21_strings/basic_string/cons/char/1.cc: Use
3720         diagnostic pragma to suppress -Wstringop-overread error.
3721
3722 2021-06-18  Patrick Palka  <ppalka@redhat.com>
3723
3724         * include/bits/ranges_algo.h (__find_fn, find, __find_if_fn)
3725         (find_if, __find_if_not_fn, find_if_not, _in_in_result)
3726         (__mismatch_fn, mismatch, __search_fn, search): Move to ...
3727         * include/bits/ranges_util.h: ... here.
3728         * include/std/ranges (__detail::find, __detail::find_if)
3729         (__detail::find_if_not, __detail::mismatch): Remove.
3730         (filter_view): Use ranges::find_if instead.
3731         (drop_while_view): Use ranges::find_if_not instead.
3732         (split_view): Use ranges::find and ranges::mismatch instead.
3733
3734 2021-06-18  Patrick Palka  <ppalka@redhat.com>
3735
3736         * include/bits/iterator_concepts.h (weakly_incrementable): Remove
3737         default_initializable requirement.
3738         * include/bits/ranges_base.h (ranges::view): Likewise.
3739         * include/bits/ranges_util.h (subrange): Constrain the default
3740         ctor.
3741         * include/bits/stl_iterator.h (back_insert_iterator): Remove the
3742         default ctor.
3743         (front_insert_iterator): Likewise.
3744         (insert_iterator): Likewise.  Remove NSDMIs.
3745         (common_iterator): Constrain the default ctor.
3746         (counted_iterator): Likewise.
3747         * include/bits/stream_iterator.h (ostream_iterator): Remove the
3748         default ctor.
3749         * include/std/ranges (__detail::__box::operator=): Handle
3750         self-assignment in the primary template.
3751         (__detail::__box): In the partial specialization: adjust
3752         constraints as per P2325.  Add specialized operator= for the
3753         case when the wrapped type is not copyable.  Constrain the
3754         default ctor.  Avoid list-initialization.
3755         (single_view): Constraint the default ctor.
3756         (iota_view): Relax semiregular constraint to copyable.
3757         Constrain the default ctor.
3758         (iota_view::_Iterator): Constraint the default ctor.
3759         (basic_istream_view): Remove the default ctor.  Remove NSDMIs.
3760         Remove redundant checks for empty _M_stream.
3761         (basic_istream_view::_Iterator): Likewise.
3762         (ref_view): Remove the default ctor.  Remove NSDMIs.
3763         (ref_view::_Iterator): Constrain the default ctor.
3764         (__detail::__non_propagating_cache::operator=): Define overload
3765         for assigning from a value of the underlying type.
3766         (filter_view): Likewise.
3767         (filter_view::_Iterator): Likewise.
3768         (transform_view): Likewise.
3769         (transform_view::_Iterator): Likewise.
3770         (take_view): Likewise.
3771         (take_view::_Iterator): Likewise.
3772         (take_while_view): Likewise.
3773         (take_while_view::_Iterator): Likewise.
3774         (drop_while_view): Likewise.
3775         (drop_while_view::_Iterator): Likewise.
3776         (join_view): Likewise.
3777         (split_view::_OuterIter::__current): Adjust after changing the
3778         type of _M_current.
3779         (split_view::_M_current): Wrap it in a __non_propagating_cache.
3780         (split_view::split_view): Constrain the default ctor.
3781         (common_view): Constrain the default ctor.
3782         (reverse_view): Likewise.
3783         (elements_view): Likewise.
3784         * include/std/span (enable_view<span<_ElementType, _Extent>>):
3785         Define this partial specialization to true unconditionally.
3786         * include/std/version (__cpp_lib_ranges): Adjust value.
3787         * testsuite/24_iterators/back_insert_iterator/constexpr.cc:
3788         Don't attempt to default construct a back_insert_iterator.
3789         * testsuite/24_iterators/front_insert_iterator/constexpr.cc:
3790         Don't attempt to default construct a front_insert_iterator.
3791         * testsuite/24_iterators/insert_iterator/constexpr.cc:
3792         Don't attempt to default construct an insert_iterator.
3793         * testsuite/24_iterators/ostream_iterator/requirements/constexpr.cc:
3794         Remove this test for default constructibility of ostream_iterator.
3795         * testsuite/std/ranges/97600.cc: Don't attempt to default
3796         construct a basic_istream_view.
3797         * testsuite/std/ranges/adaptors/detail/semiregular_box.cc:
3798         Rename to ...
3799         * testsuite/std/ranges/adaptors/detail/copyable_box.cc: ... this.
3800         (test02): Adjust now that __box is copyable-box not
3801         semiregular-box.
3802         (test03): New test.
3803         * testsuite/std/ranges/p2325.cc: New test.
3804         * testsuite/std/ranges/single_view.cc (test06): New test.
3805         * testsuite/std/ranges/view.cc: Adjust now that view doesn't
3806         require default_initializable.
3807
3808 2021-06-17  Jonathan Wakely  <jwakely@redhat.com>
3809
3810         PR libstdc++/91488
3811         * include/bits/basic_string.h (__cpp_lib_constexpr_string): Only
3812         define when is_constant_evaluated is available.
3813         * include/bits/char_traits.h (__cpp_lib_constexpr_char_traits):
3814         Likewise.
3815         (__constant_string_p, __constant_array_p): Remove.
3816         (char_traits): Use is_constant_evaluated directly.
3817         * include/std/version (__cpp_lib_constexpr_char_traits)
3818         (__cpp_lib_constexpr_string): Only define when
3819         is_constant_evaluated is available.
3820
3821 2021-06-17  Patrick Palka  <ppalka@redhat.com>
3822
3823         PR libstdc++/100940
3824         * include/std/ranges (__adaptor::_Partial): For the "simple"
3825         forwarding partial specializations, also require that
3826         the extra arguments are trivially copyable.
3827         * testsuite/std/ranges/adaptors/100577.cc (test04): New test.
3828
3829 2021-06-17  Patrick Palka  <ppalka@redhat.com>
3830
3831         PR libstdc++/100940
3832         * include/std/ranges (__adaptor::_RangeAdaptor): Document the
3833         template form of _S_has_simple_extra_args.
3834         (__adaptor::__adaptor_has_simple_extra_args): Add _Args template
3835         parameter pack.  Try to treat _S_has_simple_extra_args as a
3836         variable template parameterized by _Args.
3837         (__adaptor::_Partial): Pass _Arg/_Args to the constraint
3838         __adaptor_has_simple_extra_args.
3839         (views::_Take::_S_has_simple_extra_args): Templatize according
3840         to the type of the extra argument.
3841         (views::_Drop::_S_has_simple_extra_args): Likewise.
3842         (views::_Split::_S_has_simple_extra_args): Define.
3843         * testsuite/std/ranges/adaptors/100577.cc (test01, test02):
3844         Adjust after changes to _S_has_simple_extra_args mechanism.
3845         (test03): Define.
3846
3847 2021-06-16  Jonathan Wakely  <jwakely@redhat.com>
3848
3849         * include/bits/iterator_concepts.h (__decay_copy): Name type.
3850
3851 2021-06-16  Jonathan Wakely  <jwakely@redhat.com>
3852
3853         * include/bits/ranges_base.h (ranges::begin, ranges::end)
3854         (ranges::cbegin, ranges::cend, ranges::rbeing, ranges::rend)
3855         (ranges::crbegin, ranges::crend, ranges::size, ranges::ssize)
3856         (ranges::empty, ranges::data, ranges::cdata): Remove final
3857         keywords and deleted operator& overloads.
3858         * testsuite/24_iterators/customization_points/iter_move.cc: Use
3859         new is_customization_point_object function.
3860         * testsuite/24_iterators/customization_points/iter_swap.cc:
3861         Likewise.
3862         * testsuite/std/concepts/concepts.lang/concept.swappable/swap.cc:
3863         Likewise.
3864         * testsuite/std/ranges/access/begin.cc: Likewise.
3865         * testsuite/std/ranges/access/cbegin.cc: Likewise.
3866         * testsuite/std/ranges/access/cdata.cc: Likewise.
3867         * testsuite/std/ranges/access/cend.cc: Likewise.
3868         * testsuite/std/ranges/access/crbegin.cc: Likewise.
3869         * testsuite/std/ranges/access/crend.cc: Likewise.
3870         * testsuite/std/ranges/access/data.cc: Likewise.
3871         * testsuite/std/ranges/access/empty.cc: Likewise.
3872         * testsuite/std/ranges/access/end.cc: Likewise.
3873         * testsuite/std/ranges/access/rbegin.cc: Likewise.
3874         * testsuite/std/ranges/access/rend.cc: Likewise.
3875         * testsuite/std/ranges/access/size.cc: Likewise.
3876         * testsuite/std/ranges/access/ssize.cc: Likewise.
3877         * testsuite/util/testsuite_iterators.h
3878         (is_customization_point_object): New function.
3879
3880 2021-06-15  Jonathan Wakely  <jwakely@redhat.com>
3881
3882         * include/bits/ranges_base.h (ranges::begin, ranges::end)
3883         (ranges::cbegin, ranges::cend, ranges::rbeing, ranges::rend)
3884         (ranges::crbegin, ranges::crend, ranges::size, ranges::ssize)
3885         (ranges::empty, ranges::data, ranges::cdata): Make types final.
3886         Add deleted operator& overloads.
3887         (ranges::advance, ranges::distance, ranges::next, ranges::prev):
3888         Likewise.
3889         * testsuite/std/ranges/headers/ranges/synopsis.cc: Replace
3890         ill-formed & expressions with using-declarations. Add checks for
3891         other function objects.
3892
3893 2021-06-15  Jonathan Wakely  <jwakely@redhat.com>
3894
3895         * include/bits/ranges_util.h (view_interface): Add noexcept to
3896         empty, operator bool, data and size members.
3897         (subrange): Add noexcept to constructors.
3898         * include/std/ranges (single_view, ref_view): Add noexcept to
3899         constructors.
3900         (views::single, views::all): Add noexcept.
3901         * testsuite/std/ranges/adaptors/all.cc: Check noexcept.
3902         * testsuite/std/ranges/single_view.cc: Likewise.
3903
3904 2021-06-15  Jonathan Wakely  <jwakely@redhat.com>
3905
3906         * include/bits/ranges_util.h (subrange): Add __size_type typedef
3907         and use it to simplify declarations.
3908         (subrange(i, s, n)): Remove assertion.
3909         * testsuite/std/ranges/subrange/constexpr.cc: New test.
3910
3911 2021-06-15  Jonathan Wakely  <jwakely@redhat.com>
3912
3913         * include/bits/iterator_concepts.h (__cust_access::__decay_copy):
3914         Replace with function object.
3915         (__cust_access::__member_begin, ___cust_access::_adl_begin): Use
3916         __decay_copy unqualified.
3917         * include/bits/ranges_base.h (__member_end, __adl_end):
3918         Likewise. Use __range_iter_t for type of ranges::begin.
3919         (__member_rend): Use correct value category for rbegin argument.
3920         (__member_data): Use __decay_copy unqualified.
3921         (__begin_data): Use __range_iter_t for type of ranges::begin.
3922
3923 2021-06-14  Jonathan Wakely  <jwakely@redhat.com>
3924
3925         * include/bits/ranges_base.h (ranges::empty): Check whether
3926         conversion to bool can throw.
3927         * testsuite/std/ranges/access/empty.cc: Check for correct
3928         noexcept-specifier.
3929
3930 2021-06-14  Jonathan Wakely  <jwakely@redhat.com>
3931
3932         PR libstdc++/100894
3933         * include/std/type_traits (__common_ref_impl<X&, Y&>): Only
3934         use the type if it's a reference.
3935         * testsuite/20_util/common_reference/100894.cc: New test.
3936
3937 2021-06-14  Jonathan Wakely  <jwakely@redhat.com>
3938
3939         * testsuite/experimental/filesystem/path/native/conv_c++23.cc:
3940         Add dg-require-filesystem-ts directive.
3941
3942 2021-06-14  Jonathan Wakely  <jwakely@redhat.com>
3943
3944         PR libstdc++/101034
3945         * include/std/any (any(in_place_t<T>, initializer_list<U>, A&&...))
3946         (any::emplace<T>(initializer_list<U>, A&&...)): Fix constraint
3947         to use lvalue.
3948         * testsuite/20_util/any/cons/101034.cc: New test.
3949
3950 2021-06-14  Jonathan Wakely  <jwakely@redhat.com>
3951
3952         * testsuite/17_intro/headers/c++2017/all_attributes.cc: Add
3953         -std=gnu++17 option.
3954
3955 2021-06-14  Jonathan Wakely  <jwakely@redhat.com>
3956
3957         PR libstdc++/101056
3958         * libsupc++/compare (compare_partial_order_fallback): Add
3959         constraint using reversed parameter order, as per LWG 3465.
3960         * testsuite/18_support/comparisons/algorithms/fallback.cc:
3961         Adjust expected result.
3962
3963 2021-06-14  Jonathan Wakely  <jwakely@redhat.com>
3964
3965         * libsupc++/compare (__decayed_same_as): New helper concept.
3966         (strong_order, weak_order, partial_order): Constrain with new
3967         concept instead of using static_assert.
3968         (compare_strong_order_fallback, compare_weak_order_fallback)
3969         (compare_partial_order_fallback): Likewise. Do not deduce return
3970         types. Remove redundant if-constexpr checks.
3971         * testsuite/18_support/comparisons/algorithms/fallback.cc: New test.
3972
3973 2021-06-14  Jonathan Wakely  <jwakely@redhat.com>
3974
3975         PR libstdc++/101055
3976         * include/std/tuple: Use reserved form of attribute name.
3977         * testsuite/17_intro/headers/c++2011/all_attributes.cc: Add
3978         check for no_unique_address.
3979         * testsuite/17_intro/headers/c++2014/all_attributes.cc:
3980         Likewise.
3981         * testsuite/17_intro/headers/c++2017/all_attributes.cc:
3982         Likewise.
3983
3984 2021-06-11  Jonathan Wakely  <jwakely@redhat.com>
3985
3986         * include/bits/fs_path.h (operator==, operator<=>): Use new
3987         _S_compare function.
3988         (path::_S_compare): New function to call path::compare in a
3989         context where path::iterator is complete.
3990         * include/experimental/bits/fs_path.h (operator<, operator==):
3991         Define after path::iterator is complete.
3992         * testsuite/27_io/filesystem/path/native/conv_c++23.cc: New
3993         test.
3994         * testsuite/experimental/filesystem/path/native/conv_c++23.cc:
3995         New test.
3996
3997 2021-06-09  Thomas Rodgers  <rodgert@appliantology.com>
3998
3999         * testsuite/29_atomics/atomic_ref/wait_notify.cc: Guard
4000         test logic with constexpr check for is_always_lock_free.
4001
4002 2021-06-09  Jonathan Wakely  <jwakely@redhat.com>
4003
4004         PR libstdc++/100982
4005         * include/std/optional (optional::operator=(const optional<U>&)):
4006         Fix value category used in is_assignable check.
4007         * testsuite/20_util/optional/assignment/100982.cc: New test.
4008
4009 2021-06-09  Jonathan Wakely  <jwakely@redhat.com>
4010
4011         * include/bits/allocator.h (allocator::is_always_equal): Deprecate.
4012         * include/bits/iterator_concepts.h (indirectly_readable_traits):
4013         Add LWG issue number to comment.
4014         * include/std/memory_resource (polymorphic_allocator::release):
4015         Deprecate.
4016         * testsuite/20_util/allocator/requirements/typedefs.cc: Add
4017         dg-warning for deprecation. Also check std::allocator<void>.
4018
4019 2021-06-08  Thomas Rodgers  <rodgert@appliantology.com>
4020
4021         PR libstdc++/100889
4022         * include/bits/atomic_base.h (atomic_ref<_Tp*>::wait):
4023         Change parameter type from _Tp to _Tp*.
4024         * testsuite/29_atomics/atomic_ref/wait_notify.cc: Extend
4025         coverage of types tested.
4026
4027 2021-06-08  Thomas Rodgers  <rodgert@appliantology.com>
4028
4029         * include/std/barrier (__tree_barrier::_M_arrive): Remove
4030         unnecessary hasher instantiation.
4031
4032 2021-06-08  Jonathan Wakely  <jwakely@redhat.com>
4033
4034         * include/experimental/propagate_const (swap): Constrain.
4035         * testsuite/experimental/propagate_const/swap/lwg3413.cc: New test.
4036
4037 2021-06-07  Avi Kivity  <avi@scylladb.com>
4038
4039         PR libstdc++/100900
4040         * include/std/ranges (elements_view::__iter_cat::_S_iter_cat):
4041         Add missing typename.
4042
4043 2021-06-07  Jonathan Wakely  <jwakely@redhat.com>
4044
4045         PR libstdc++/98842
4046         * include/std/optional (operator<=>(const optional<T>& const U&)):
4047         Add missing constraint and add workaround for template
4048         recursion.
4049         * testsuite/20_util/optional/relops/three_way.cc: Check that
4050         type without equality comparison cannot be compared when wrapped
4051         in std::optional.
4052
4053 2021-06-05  Jonathan Wakely  <jwakely@redhat.com>
4054
4055         PR libstdc++/100824
4056         * include/bits/ranges_base.h (_SSize): Return signed type.
4057         * testsuite/std/ranges/access/ssize.cc: Check with __int128.
4058
4059 2021-06-04  Jonathan Wakely  <jwakely@redhat.com>
4060
4061         * include/bits/ranges_base.h (_SSize): Return the result of
4062         ranges::size converted to the wider of make-signed-like-t<S> and
4063         ptrdiff_t, rather than the ranges different type.
4064         * testsuite/std/ranges/access/ssize.cc: Adjust expected result
4065         for an iota_view that uses an integer class type for its
4066         difference_type.
4067
4068 2021-06-04  Jonathan Wakely  <jwakely@redhat.com>
4069
4070         PR libstdc++/100824
4071         * include/bits/ranges_base.h (__member_data): Use __decay_copy.
4072         * testsuite/std/ranges/access/data.cc: Add testcase from PR.
4073
4074 2021-06-04  Jonathan Wakely  <jwakely@redhat.com>
4075
4076         PR libstdc++/100824
4077         * include/bits/iterator_concepts.h (__detail::__decay_copy)
4078         (__detail::__member_begin, __detail::__adl_begin): Move to
4079         namespace ranges::__cust_access.
4080         (__detail::__ranges_begin): Likewise, and rename to __begin.
4081         Remove redundant static assertion.
4082         * include/bits/ranges_base.h (_Begin, _End, _RBegin, _REnd):
4083         Use lvalue in noexcept specifier.
4084         (__as_const): Add non-deduced parameter for value category.
4085         (_CBegin, _CEnd, _CRBegin, _CREnd, _CData): Adjust uses of
4086         __as_const.
4087         (__member_size, __adl_size, __member_empty, __size0_empty):
4088         (__eq_iter_empty, __adl_data): Use lvalue objects in
4089         requirements.
4090         (__sentinel_size): Likewise. Add check for conversion to
4091         unsigned-like.
4092         (__member_data): Allow non-lvalue types to satisfy the concept,
4093         but use lvalue object in requirements.
4094         (_Size, _SSize): Remove forwarding to always use an lvalue.
4095         (_Data): Likewise. Add static assertion for arrays.
4096         * testsuite/std/ranges/access/cdata.cc: Adjust expected
4097         behaviour for rvalues. Add negative tests for ill-formed
4098         expressions.
4099         * testsuite/std/ranges/access/data.cc: Likewise.
4100         * testsuite/std/ranges/access/empty.cc: Adjust expected
4101         behaviour for rvalues.
4102         * testsuite/std/ranges/access/size.cc: Likewise.
4103
4104 2021-06-04  Tim Adye  <Tim.Adye@cern.ch>
4105
4106         * include/std/any (any::_Manager::_S_access): New static
4107         function to access the contained value.
4108         (any::emplace, __any_caster): Use _S_access member of the
4109         manager type.
4110
4111 2021-06-04  Jonathan Wakely  <jwakely@redhat.com>
4112
4113         * doc/xml/manual/status_cxx2020.xml:
4114         * doc/html/*: Regenerate.
4115         * include/bits/hashtable.h (__cpp_lib_generic_unordered_lookup):
4116         Define.
4117         * include/std/version (__cpp_lib_generic_unordered_lookup):
4118         Define.
4119         * testsuite/23_containers/unordered_map/operations/1.cc: Check
4120         feature test macro.
4121         * testsuite/23_containers/unordered_set/operations/1.cc:
4122         Likewise.
4123
4124 2021-06-03  Patrick Palka  <ppalka@redhat.com>
4125
4126         * include/bits/ranges_algo.h (__detail::__can_reread_output):
4127         Factor out this concept from ...
4128         (__unique_copy_fn::operator()): ... here.  Use the concept
4129         throughout.
4130         * testsuite/std/ranges/range.cc: Remove now ill-formed use
4131         of range_value_t on an output_range.
4132         * testsuite/util/testsuite_iterators.h (output_iterator_wrapper):
4133         Define value_type, pointer and reference member types to void.
4134
4135 2021-06-03  Patrick Palka  <ppalka@redhat.com>
4136
4137         PR libstdc++/100577
4138         * include/std/ranges (_RangeAdaptorClosure): Document
4139         _S_has_simple_call_op mechanism.
4140         (_RangeAdaptor): Document _S_has_simple_extra_args mechanism.
4141         (__closure_has_simple_call_op): New concept.
4142         (__adaptor_has_simple_extra_args): Likewise.
4143         (_Partial<_Adaptor, _Args...>): New partial specialization.
4144         (_Partial<_Adaptor, _Arg>): Likewise.
4145         (_Pipe<_Lhs, _Rhs>): Likewise.
4146         (views::_All::_S_has_simple_call_op): Define to true.
4147         (views::_Filter::_S_has_simple_extra_args): Likewise.
4148         (views::_Transform::_S_has_simple_extra_args): Likewise.
4149         (views::_Take::_S_has_simple_extra_args): Likewise.
4150         (views::_TakeWhile::_S_has_simple_extra_args): Likewise.
4151         (views::_Drop::_S_has_simple_extra_args): Likewise.
4152         (views::_DropWhile::_S_has_simple_extra_args): Likewise.
4153         (views::_Join::_S_has_simple_call_op): Likewise.
4154         (views::_Split): Document why we don't define
4155         _S_has_simple_extra_args to true for this adaptor.
4156         (views::_Common::_S_has_simple_call_op): Define to true.
4157         (views::_Reverse::_S_has_simple_call_op): Likewise.
4158         (views::_Elements::_S_has_simple_call_op): Likewise.
4159         * testsuite/std/ranges/adaptors/100577.cc: New test.
4160
4161 2021-06-02  Jonathan Wakely  <jwakely@redhat.com>
4162
4163         PR libstdc++/100863
4164         PR libstdc++/65816
4165         * include/bits/hashtable_policy.h (_Hashtable_ebo_helper):
4166         Value-initialize subobject.
4167         * testsuite/23_containers/unordered_map/allocator/default_init.cc:
4168         Remove XFAIL.
4169         * testsuite/23_containers/unordered_set/allocator/default_init.cc:
4170         Remove XFAIL.
4171
4172 2021-06-02  Jonathan Wakely  <jwakely@redhat.com>
4173
4174         PR libstdc++/96088
4175         * testsuite/23_containers/unordered_map/96088.cc: Adjust
4176         expected number of allocations.
4177         * testsuite/23_containers/unordered_set/96088.cc: Likewise.
4178
4179 2021-06-02  Jonathan Wakely  <jwakely@redhat.com>
4180
4181         * doc/xml/manual/status_cxxis29124.xml: Improve punctuation.
4182         * doc/xml/manual/status_cxxtr1.xml: Likewise.
4183         * doc/xml/manual/status_cxxtr24733.xml: Likewise.
4184         * doc/html/*: Regenerate.
4185
4186 2021-06-01  Patrick Palka  <ppalka@redhat.com>
4187
4188         PR c++/65816
4189         * testsuite/23_containers/deque/allocator/default_init.cc,
4190         testsuite/23_containers/forward_list/allocator/default_init.cc,
4191         testsuite/23_containers/list/allocator/default_init.cc,
4192         testsuite/23_containers/map/allocator/default_init.cc,
4193         testsuite/23_containers/set/allocator/default_init.cc,
4194         testsuite/23_containers/vector/allocator/default_init.cc,
4195         testsuite/23_containers/vector/bool/allocator/default_init.cc:
4196         Remove xfail.
4197
4198 2021-06-01  Jonathan Wakely  <jwakely@redhat.com>
4199
4200         * testsuite/23_containers/unordered_map/96088.cc: Change
4201         effective target to c++17.
4202         * testsuite/23_containers/unordered_set/96088.cc: Likewise.
4203
4204 2021-06-01  Jonathan Wakely  <jwakely@redhat.com>
4205
4206         * testsuite/22_locale/ctype/is/string/89728_neg.cc: Only test
4207         isblank for C++11 and later.
4208
4209 2021-06-01  Jonathan Wakely  <jwakely@redhat.com>
4210
4211         PR libstdc++/100833
4212         * include/bits/ranges_base.h (ranges::advance(iter, n, sentinel)):
4213         Fix return value for no-op case.
4214         * testsuite/24_iterators/range_operations/advance.cc: Test
4215         return values of three-argument overload.
4216
4217 2021-06-01  Jonathan Wakely  <jwakely@redhat.com>
4218
4219         PR libstdc++/99453
4220         * python/Makefile.am: Use archive name for printer hook if no
4221         dynamic library name is available.
4222         * python/Makefile.in: Regenerate.
4223
4224 2021-05-30  Gerald Pfeifer  <gerald@pfeifer.com>
4225
4226         * doc/xml/manual/abi.xml: Remove dead reference to "Intel
4227         Compilers for Linux: Compatibility with GNU Compilers" article.
4228         * doc/html/manual/abi.html: Regenerate.
4229
4230 2021-05-26  François Dumont  <fdumont@gcc.gnu.org>
4231
4232         * include/debug/formatter.h
4233         (_Error_formatter::_Parameter::_Named): New.
4234         (_Error_formatter::_Parameter::_Type): Inherit latter.
4235         (_Error_formatter::_Parameter::_M_integer): Likewise.
4236         (_Error_formatter::_Parameter::_M_string): Likewise.
4237         * src/c++11/debug.cc: Include <cstring>.
4238         (_Print_func_t): New.
4239         (print_raw(PrintContext&, const char*, ptrdiff_t)): New.
4240         (print_word): Use '%.*s' format in fprintf to render only expected number of chars.
4241         (pretty_print(PrintContext&, const char*, _Print_func_t)): New.
4242         (print_type): Rename in...
4243         (print_type_info): ...this. Use pretty_print.
4244         (print_address, print_integer): New.
4245         (print_named_name, print_iterator_constness, print_iterator_state): New.
4246         (print_iterator_seq_type): New.
4247         (print_named_field, print_type_field, print_instance_field, print_iterator_field): New.
4248         (print_field): Use latters.
4249         (print_quoted_named_name, print_type_type, print_type, print_instance): New.
4250         (print_string(PrintContext&, const char*, const _Parameter*, size_t)):
4251         Change signature to...
4252         (print_string(PrintContext&, const char*, ptrdiff_t, const _Parameter*, size_t)):
4253         ...this and adapt. Remove intermediate buffer to render input string.
4254         (print_string(PrintContext&, const char*, ptrdiff_t)): New.
4255
4256 2021-05-26  Jonathan Wakely  <jwakely@redhat.com>
4257
4258         PR libstdc++/100768
4259         * include/bits/ranges_base.h (advance, distance, next, prev):
4260         Replace function templates with function objects.
4261         * testsuite/24_iterators/headers/iterator/synopsis_c++20.cc:
4262         Adjust for changes to function objects.
4263         * testsuite/std/ranges/adaptors/elements.cc: Add using
4264         declarations for names from namespace ranges.
4265         * testsuite/std/ranges/adaptors/transform.cc: Likewise.
4266         * testsuite/24_iterators/range_operations/100768.cc: New test.
4267
4268 2021-05-24  François Dumont  <fdumont@gcc.gnu.org>
4269
4270         PR libstdc++/96088
4271         * include/bits/hashtable_policy.h (_Select2nd): New.
4272         (_NodeBuilder<>): New.
4273         (_ReuseOrAllocNode<>::operator()): Use variadic template args.
4274         (_AllocNode<>::operator()): Likewise.
4275         * include/bits/hashtable.h
4276         (_Hashtable<>::__node_builder_t): New.
4277         (_Hashtable<>::_M_insert_unique<>(_Kt&&, _Arg&&, const _NodeGenerator&)):
4278          New.
4279         (_Hashtable<>::_S_forward_key): New.
4280         (_Hashtable<>::_M_insert): Use latter.
4281         (_Hashtable<>::_M_insert(const_iterator, _Arg&&, const _NodeGenerator&, false_type)):
4282         Instantiate node first, compute hash code second.
4283         * testsuite/23_containers/unordered_map/96088.cc: New test.
4284         * testsuite/23_containers/unordered_multimap/96088.cc: New test.
4285         * testsuite/23_containers/unordered_multiset/96088.cc: New test.
4286         * testsuite/23_containers/unordered_set/96088.cc: New test.
4287         * testsuite/util/replacement_memory_operators.h
4288         (counter::_M_increment): New.
4289         (counter::_M_decrement): New.
4290         (counter::reset()): New.
4291
4292 2021-05-24  Patrick Palka  <ppalka@redhat.com>
4293
4294         PR libstdc++/100479
4295         * include/std/ranges (__detail::__non_propagating_cache): Move
4296         definition up to before that of _CachedPosition.  Make base
4297         class _Optional_base protected instead of private.  Add const
4298         overload for operator*.
4299         (__detail::_CachedPosition): Rewrite the partial specialization
4300         for forward ranges as a derived class of __non_propagating_cache.
4301         Remove the size constraint on the partial specialization for
4302         random access ranges.  Add copy/move/copy-assignment/move-assignment
4303         members to the offset partial specialization for random
4304         access ranges that propagate the cached value but additionally
4305         invalidate it in the source object on move.
4306         * testsuite/std/ranges/adaptors/100479.cc: New test.
4307
4308 2021-05-24  Jonathan Wakely  <jwakely@redhat.com>
4309
4310         * testsuite/25_algorithms/inplace_merge/constrained.cc: Qualify
4311         call to ranges::next.
4312         * testsuite/25_algorithms/is_sorted/constrained.cc: Likewise.
4313         * testsuite/25_algorithms/is_sorted_until/constrained.cc:
4314         Likewise.
4315         * testsuite/25_algorithms/swap_ranges/1.cc: Qualify call to
4316         swap_ranges.
4317
4318 2021-05-21  Patrick Palka  <ppalka@redhat.com>
4319
4320         PR libstdc++/100606
4321         * include/std/ranges (drop_while_view::begin): Assert the
4322         precondition added by LWG 3490.
4323
4324 2021-05-21  Patrick Palka  <ppalka@redhat.com>
4325
4326         PR libstdc++/100690
4327         * include/std/ranges (iota_view::_Sentinel::_M_distance_from):
4328         Split out this member function from ...
4329         (iota_view::_Sentinel::operator-): ... here, for sake of access
4330         control.
4331         * testsuite/std/ranges/iota/iota_view.cc (test05): New test.
4332
4333 2021-05-20  Jonathan Wakely  <jwakely@redhat.com>
4334
4335         * include/bits/random.tcc (__representable_as_double)
4336         (__p1_representable_as_double): Add "" to static asserts.
4337
4338 2021-05-20  Jonathan Wakely  <jwakely@redhat.com>
4339
4340         PR libstdc++/100676
4341         * include/bits/c++config (__glibcxx_assert_1): Rename to ...
4342         (__glibcxx_constexpr_assert): ... this.
4343         (__glibcxx_assert_impl): Use __glibcxx_constexpr_assert.
4344         (__glibcxx_assert): Define as either __glibcxx_constexpr_assert
4345         or __glibcxx_assert_impl.
4346         (__glibcxx_assert_2): Remove
4347         * include/debug/macros.h (_GLIBCXX_DEBUG_VERIFY_AT_F): Use
4348         __glibcxx_constexpr_assert instead of __glibcxx_assert_1.
4349         * testsuite/21_strings/basic_string_view/element_access/char/back_constexpr_neg.cc:
4350         Adjust expected error.
4351         * testsuite/21_strings/basic_string_view/element_access/char/constexpr_neg.cc:
4352         Likewise.
4353         * testsuite/21_strings/basic_string_view/element_access/char/front_constexpr_neg.cc:
4354         Likewise.
4355         Likewise.
4356         * testsuite/21_strings/basic_string_view/element_access/wchar_t/back_constexpr_neg.cc:
4357         Likewise.
4358         * testsuite/21_strings/basic_string_view/element_access/wchar_t/constexpr_neg.cc:
4359         Likewise.
4360         * testsuite/21_strings/basic_string_view/element_access/wchar_t/front_constexpr_neg.cc:
4361         Likewise.
4362         * testsuite/23_containers/span/back_neg.cc: Likewise.
4363         * testsuite/23_containers/span/front_neg.cc: Likewise.
4364         * testsuite/23_containers/span/index_op_neg.cc: Likewise.
4365
4366 2021-05-20  Patrick Palka  <ppalka@redhat.com>
4367
4368         PR libstdc++/100639
4369         * include/bits/stl_iterator.h (reverse_iterator::difference_type):
4370         In C++20 mode, define in terms of iter_difference_t as per P0896R4.
4371         (reverse_iterator::reference): Likewise, but with iter_reference_t.
4372         (reverse_iterator::value_type): Likewise, but with iter_value_t.
4373         * testsuite/std/ranges/adaptors/reverse.cc (test08): New test.
4374         * testsuite/24_iterators/reverse_iterator/100639.cc: New test.
4375
4376 2021-05-20  Joern Rennecke  <joern.rennecke@riscy-ip.com>
4377
4378         PR libstdc++/100361
4379         * include/std/charconv (to_chars): Hide the overloads for
4380         floating-point types for 16 bit targets.
4381         * src/c++17/floating_to_chars.cc: Don't compile for 16 bit targets.
4382         * testsuite/20_util/to_chars/double.cc: Run this test only on
4383         size32plus targets.
4384         * testsuite/20_util/to_chars/float.cc: Likewise.
4385         * testsuite/20_util/to_chars/long_double.cc: Likewise.
4386
4387 2021-05-18  Patrick Palka  <ppalka@redhat.com>
4388
4389         PR libstdc++/100631
4390         * include/std/ranges (elements_view::_Sentinel::operator-): Use
4391         _M_distance_from in the other operator- overload too.
4392         * testsuite/std/ranges/adaptors/elements.cc (test06): Augment test.
4393
4394 2021-05-18  Thomas Schwinge  <thomas@codesourcery.com>
4395
4396         * testsuite/lib/prune.exp: Add note about 'dg-note'.
4397
4398 2021-05-18  Patrick Palka  <ppalka@redhat.com>
4399
4400         PR libstdc++/100475
4401         * include/std/ranges (__box::__box): Use non-list-initialization
4402         in member initializer list of in-place constructor of the
4403         partial specialization for semiregular types.
4404         (__box::operator->): Use std::__addressof.
4405         * testsuite/std/ranges/adaptors/detail/semiregular_box.cc
4406         (test02): New test.
4407         * testsuite/std/ranges/single_view.cc (test04): New test.
4408
4409 2021-05-18  Patrick Palka  <ppalka@redhat.com>
4410
4411         PR libstdc++/100621
4412         * include/std/ranges (reverse_view::_S_needs_cached_begin):
4413         Set to true if the underlying non-common random-access range
4414         doesn't have a sized sentinel.
4415
4416 2021-05-18  Patrick Palka  <ppalka@redhat.com>
4417
4418         PR libstdc++/100631
4419         * include/std/ranges (elements_view::_Iterator): Also befriend
4420         _Sentinel<!_Const>.
4421         (elements_view::_Sentinel::_M_equal): Templatize.
4422         (elements_view::_Sentinel::_M_distance_from): Split out from ...
4423         (elements_view::_Sentinel::operator-): ... here.  Depend on
4424         _Base2 instead of _Base in the return type.
4425         * testsuite/std/ranges/adaptors/elements.cc (test06, test07):
4426         New tests.
4427
4428 2021-05-17  Thomas Rodgers  <rodgert@twrodgers.com>
4429
4430         * include/bits/atomic_wait.h (__waiter::_M_do_wait_v): loop
4431         until value change observed.
4432         (__waiter_base::_M_laundered): New member.
4433         (__waiter_base::_M_notify): Check _M_laundered to determine
4434         whether to wake one or all.
4435         (__detail::__atomic_compare): Return true if call to
4436         __builtin_memcmp() == 0.
4437         (__waiter_base::_S_do_spin_v): Adjust predicate.
4438         * testsuite/29_atomics/atomic/wait_notify/100334.cc: New
4439         test.
4440
4441 2021-05-17  Jonathan Wakely  <jwakely@redhat.com>
4442
4443         PR libstdc++/100630
4444         * include/experimental/bits/fs_path.h (__is_constructible_from):
4445         Test construction from a const lvalue, not an rvalue.
4446         * testsuite/27_io/filesystem/path/construct/100630.cc: New test.
4447         * testsuite/experimental/filesystem/path/construct/100630.cc:
4448         New test.
4449
4450 2021-05-17  Antony Polukhin  <antoshkka@gmail.com>
4451
4452         PR libstdc++/89728
4453         * include/bits/locale_facets.h (ctype<basic_string<C,T,A>>):
4454         Declare (but do not define) partial specialization.
4455         * testsuite/22_locale/ctype/is/string/89728_neg.cc: New test.
4456
4457 2021-05-17  Jonathan Wakely  <jwakely@redhat.com>
4458
4459         * include/std/thread (jthread::_S_create): Fix static assert
4460         message.
4461         * testsuite/30_threads/jthread/95989.cc: Re-enable test.
4462         * testsuite/30_threads/jthread/jthread.cc: Do not require
4463         pthread effective target.
4464         * testsuite/30_threads/jthread/2.cc: Moved to...
4465         * testsuite/30_threads/jthread/version.cc: ...here.
4466
4467 2021-05-17  Jonathan Wakely  <jwakely@redhat.com>
4468
4469         * doc/Makefile.am: Simplify doxygen recipes and use --latex_cmd.
4470         * doc/Makefile.in: Regenerate.
4471         * doc/doxygen/user.cfg.in (LATEX_CMD_NAME): Add placeholder
4472         value.
4473         * scripts/run_doxygen (print_usage): Always print to stdout and
4474         do not exit.
4475         (fail): New function for exiting on error.
4476         (parse_options): Handle --latex_cmd. Do not treat --help the
4477         same as errors. Simplify handling of required arguments.
4478
4479 2021-05-12  Jonathan Wakely  <jwakely@redhat.com>
4480
4481         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_end.cc:
4482         Increase dg-timeout-factor to 4. Fix -Wunused-parameter
4483         warnings. Replace bitwise AND with logical AND in loop
4484         condition.
4485         * testsuite/25_algorithms/pstl/alg_nonmodifying/search_n.cc:
4486         Replace bitwise AND with logical AND in loop condition.
4487         * testsuite/util/pstl/test_utils.h: Remove unused parameter
4488         names.
4489
4490 2021-05-11  Patrick Palka  <ppalka@redhat.com>
4491
4492         * src/c++17/ryu/LOCAL_PATCHES: Update.
4493         * src/c++17/ryu/ryu_generic_128.h: Remove extern "C".
4494         Remove declarations for never-defined functions.
4495         * testsuite/20_util/to_chars/4.cc: New test.
4496
4497 2021-05-11  Jonathan Wakely  <jwakely@redhat.com>
4498
4499         * testsuite/20_util/headers/memory/synopsis.cc: Define C++98
4500         alternative for macro.
4501         * testsuite/20_util/shared_ptr/creation/99006.cc: Add effective
4502         target keyword.
4503         * testsuite/25_algorithms/copy/debug/99402.cc: Avoid C++11
4504         syntax.
4505
4506 2021-05-11  Jonathan Wakely  <jwakely@redhat.com>
4507
4508         * include/bits/allocator.h (allocator<void>) [C++20]: Add
4509         missing noexcept to constructor. Restore missing POCMA and
4510         is_always_equal_traits.
4511         [C++17]: Make construct and destroy members private and
4512         declare allocator_traits as a friend.
4513         * include/bits/memoryfwd.h (allocator_traits): Declare.
4514         * include/ext/malloc_allocator.h (malloc_allocator::allocate):
4515         Add nodiscard attribute. Add static assertion for LWG 3307.
4516         * include/ext/new_allocator.h (new_allocator::allocate): Add
4517         static assertion for LWG 3307.
4518         * testsuite/20_util/allocator/void.cc: Check that converting
4519         constructor is noexcept. Check for propagation traits and
4520         size_type and difference_type. Check that pointer and
4521         const_pointer are gone in C++20.
4522
4523 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
4524
4525         * include/std/stop_token: Remove TODO comment.
4526
4527 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
4528
4529         * include/bits/shared_ptr_base.h (__shared_count(unique_ptr&&)):
4530         Initialize a non-reference deleter from an rvalue, as per LWG
4531         3548.
4532         (__shared_ptr::_UniqCompatible): Add missing constraint.
4533         * testsuite/20_util/shared_ptr/cons/lwg3548.cc: New test.
4534         * testsuite/20_util/shared_ptr/cons/unique_ptr_deleter.cc: Check
4535         constraints.
4536
4537 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
4538
4539         * testsuite/17_intro/headers/c++2017/all_attributes.cc: Remove
4540         -std=gnu++17 from dg-options directive.
4541         * testsuite/17_intro/headers/c++2017/all_no_exceptions.cc:
4542         Likewise.
4543         * testsuite/17_intro/headers/c++2017/all_pedantic_errors.cc:
4544         Likewise.
4545         * testsuite/17_intro/headers/c++2017/operator_names.cc:
4546         Likewise.
4547         * testsuite/17_intro/headers/c++2017/parallel_mode.cc: Likewise.
4548         * testsuite/17_intro/headers/c++2017/stdc++.cc: Likewise.
4549         * testsuite/17_intro/headers/c++2017/stdc++_multiple_inclusion.cc:
4550         Likewise.
4551         * testsuite/18_support/aligned_alloc/aligned_alloc.cc: Likewise.
4552         * testsuite/18_support/byte/81076.cc: Likewise.
4553         * testsuite/18_support/byte/global_neg.cc: Likewise.
4554         * testsuite/18_support/byte/ops.cc: Likewise.
4555         * testsuite/18_support/byte/requirements.cc: Likewise.
4556         * testsuite/18_support/headers/cfloat/values_c++17.cc: Likewise.
4557         * testsuite/18_support/launder/1.cc: Likewise.
4558         * testsuite/18_support/launder/nodiscard.cc: Likewise.
4559         * testsuite/18_support/launder/requirements.cc: Likewise.
4560         * testsuite/18_support/launder/requirements_neg.cc: Likewise.
4561         * testsuite/18_support/new_aligned.cc: Likewise.
4562         * testsuite/18_support/uncaught_exceptions/uncaught_exceptions.cc:
4563         Likewise.
4564         * testsuite/19_diagnostics/error_code/is_error_code_v.cc:
4565         Likewise.
4566         * testsuite/19_diagnostics/error_condition/hash.cc: Likewise.
4567         * testsuite/20_util/addressof/requirements/constexpr.cc:
4568         Likewise.
4569         * testsuite/20_util/as_const/1.cc: Likewise.
4570         * testsuite/20_util/as_const/rvalue_neg.cc: Likewise.
4571         * testsuite/20_util/bind/83427.cc: Likewise.
4572         * testsuite/20_util/bind/is_placeholder_v.cc: Likewise.
4573         * testsuite/20_util/bool_constant/requirements.cc: Likewise.
4574         * testsuite/20_util/duration/arithmetic/constexpr_c++17.cc:
4575         Likewise.
4576         * testsuite/20_util/duration/requirements/treat_as_floating_point_v.cc:
4577         Likewise.
4578         * testsuite/20_util/duration_cast/rounding.cc: Likewise.
4579         * testsuite/20_util/enable_shared_from_this/members/weak_from_this.cc:
4580         Likewise.
4581         * testsuite/20_util/from_chars/1_neg.cc: Likewise.
4582         * testsuite/20_util/from_chars/requirements.cc: Likewise.
4583         * testsuite/20_util/function/91456.cc: Likewise.
4584         * testsuite/20_util/function/cons/deduction.cc: Likewise.
4585         * testsuite/20_util/function_objects/83607.cc: Likewise.
4586         * testsuite/20_util/function_objects/invoke/59768.cc: Likewise.
4587         * testsuite/20_util/function_objects/mem_fn/80478.cc: Likewise.
4588         * testsuite/20_util/function_objects/not_fn/1.cc: Likewise.
4589         * testsuite/20_util/function_objects/not_fn/87538.cc: Likewise.
4590         * testsuite/20_util/has_unique_object_representations/requirements/explicit_instantiation.cc:
4591         Likewise.
4592         * testsuite/20_util/has_unique_object_representations/requirements/typedefs.cc:
4593         Likewise.
4594         * testsuite/20_util/has_unique_object_representations/value.cc:
4595         Likewise.
4596         * testsuite/20_util/hash/nullptr.cc: Likewise.
4597         * testsuite/20_util/in_place/requirements.cc: Likewise.
4598         * testsuite/20_util/is_aggregate/incomplete_neg.cc: Likewise.
4599         * testsuite/20_util/is_aggregate/requirements/explicit_instantiation.cc:
4600         Likewise.
4601         * testsuite/20_util/is_aggregate/requirements/typedefs.cc:
4602         Likewise.
4603         * testsuite/20_util/is_aggregate/value.cc: Likewise.
4604         * testsuite/20_util/is_invocable/83395.cc: Likewise.
4605         * testsuite/20_util/is_invocable/91456.cc: Likewise.
4606         * testsuite/20_util/is_invocable/requirements/explicit_instantiation.cc:
4607         Likewise.
4608         * testsuite/20_util/is_invocable/requirements/typedefs.cc:
4609         Likewise.
4610         * testsuite/20_util/is_invocable/value.cc: Likewise.
4611         * testsuite/20_util/is_literal_type/deprecated-1z.cc: Likewise.
4612         * testsuite/20_util/is_nothrow_constructible/94003.cc: Likewise.
4613         * testsuite/20_util/is_nothrow_invocable/83395.cc: Likewise.
4614         * testsuite/20_util/is_nothrow_invocable/requirements/explicit_instantiation.cc:
4615         Likewise.
4616         * testsuite/20_util/is_nothrow_invocable/requirements/typedefs.cc: Likewise.
4617         * testsuite/20_util/is_nothrow_invocable/value.cc: Likewise.
4618         * testsuite/20_util/is_nothrow_swappable/requirements/explicit_instantiation.cc:
4619         Likewise.
4620         * testsuite/20_util/is_nothrow_swappable/requirements/typedefs.cc:
4621         Likewise.
4622         * testsuite/20_util/is_nothrow_swappable/value.cc: Likewise.
4623         * testsuite/20_util/is_nothrow_swappable_with/requirements/explicit_instantiation.cc:
4624         Likewise.
4625         * testsuite/20_util/is_nothrow_swappable_with/requirements/typedefs.cc:
4626         Likewise.
4627         * testsuite/20_util/is_nothrow_swappable_with/value.cc:
4628         Likewise.
4629         * testsuite/20_util/is_swappable/requirements/explicit_instantiation.cc:
4630         Likewise.
4631         * testsuite/20_util/is_swappable/requirements/typedefs.cc:
4632         Likewise.
4633         * testsuite/20_util/is_swappable/value.cc: Likewise.
4634         * testsuite/20_util/is_swappable_with/requirements/explicit_instantiation.cc:
4635         Likewise.
4636         * testsuite/20_util/is_swappable_with/requirements/typedefs.cc:
4637         Likewise.
4638         * testsuite/20_util/is_swappable_with/value.cc: Likewise.
4639         * testsuite/20_util/logical_traits/83134.cc: Likewise.
4640         * testsuite/20_util/logical_traits/requirements/explicit_instantiation.cc:
4641         Likewise.
4642         * testsuite/20_util/logical_traits/requirements/typedefs.cc:
4643         Likewise.
4644         * testsuite/20_util/logical_traits/value.cc: Likewise.
4645         * testsuite/20_util/pair/cons/deduction.cc: Likewise.
4646         * testsuite/20_util/pair/swap_cxx17.cc: Likewise.
4647         * testsuite/20_util/ratio/requirements/ratio_equal_v.cc:
4648         Likewise.
4649         * testsuite/20_util/reference_wrapper/83427.cc: Likewise.
4650         * testsuite/20_util/reference_wrapper/deduction.cc: Likewise.
4651         * testsuite/20_util/shared_ptr/casts/reinterpret.cc: Likewise.
4652         * testsuite/20_util/shared_ptr/cons/deduction.cc: Likewise.
4653         * testsuite/20_util/shared_ptr/requirements/weak_type.cc:
4654         Likewise.
4655         * testsuite/20_util/time_point/arithmetic/constexpr.cc:
4656         Likewise.
4657         * testsuite/20_util/time_point_cast/rounding.cc: Likewise.
4658         * testsuite/20_util/to_chars/3.cc: Likewise.
4659         * testsuite/20_util/to_chars/chars_format.cc: Likewise.
4660         * testsuite/20_util/to_chars/lwg3266.cc: Likewise.
4661         * testsuite/20_util/to_chars/requirements.cc: Likewise.
4662         * testsuite/20_util/tuple/78939.cc: Likewise.
4663         * testsuite/20_util/tuple/apply/1.cc: Likewise.
4664         * testsuite/20_util/tuple/apply/2.cc: Likewise.
4665         * testsuite/20_util/tuple/cons/deduction.cc: Likewise.
4666         * testsuite/20_util/tuple/make_from_tuple/1.cc: Likewise.
4667         * testsuite/20_util/tuple/make_from_tuple/2.cc: Likewise.
4668         * testsuite/20_util/tuple/swap_cxx17.cc: Likewise.
4669         * testsuite/20_util/tuple/tuple_size_v.cc: Likewise.
4670         * testsuite/20_util/unique_ptr/cons/deduction_neg.cc: Likewise.
4671         * testsuite/20_util/uses_allocator/requirements/uses_allocator_v.cc:
4672         Likewise.
4673         * testsuite/20_util/variable_templates_for_traits.cc: Likewise.
4674         * testsuite/20_util/void_t/1.cc: Likewise.
4675         * testsuite/20_util/weak_ptr/cons/deduction.cc: Likewise.
4676         * testsuite/24_iterators/container_access.cc: Likewise.
4677         * testsuite/24_iterators/headers/iterator/range_access_c++17.cc:
4678         Likewise.
4679         * testsuite/24_iterators/headers/iterator/synopsis_c++17.cc:
4680         Likewise.
4681         * testsuite/24_iterators/range_access/range_access_cpp17.cc:
4682         Likewise.
4683         * testsuite/24_iterators/range_access/range_access_cpp17_neg.cc:
4684         Likewise.
4685         * testsuite/26_numerics/gcd/gcd_neg.cc: Likewise.
4686         * testsuite/26_numerics/headers/cmath/functions_std_c++17.cc:
4687         Likewise.
4688         * testsuite/26_numerics/headers/cmath/hypot.cc: Likewise.
4689         * testsuite/26_numerics/headers/cmath/special_functions_global.cc:
4690         Likewise.
4691         * testsuite/26_numerics/lcm/1.cc: Likewise.
4692         * testsuite/26_numerics/lcm/lcm_neg.cc: Likewise.
4693         * testsuite/26_numerics/valarray/deduction.cc: Likewise.
4694         * testsuite/27_io/basic_ostream/inserters_other/char/lwg2221.cc:
4695         Likewise.
4696         * testsuite/27_io/manipulators/standard/char/quoted_sv.cc:
4697         Likewise.
4698         * testsuite/27_io/manipulators/standard/wchar_t/quoted_sv.cc:
4699         Likewise.
4700         * testsuite/27_io/types/4.cc: Likewise.
4701         * testsuite/28_regex/basic_regex/ctors/deduction.cc: Likewise.
4702         * testsuite/libstdc++-prettyprinters/91997.cc: Likewise.
4703         * testsuite/libstdc++-prettyprinters/cxx17.cc: Likewise.
4704
4705 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
4706
4707         * testsuite/20_util/function_objects/searchers.cc: Remove
4708         -std=gnu++17 from dg-options directive.
4709         * testsuite/20_util/specialized_algorithms/memory_management_tools/1.cc:
4710         Likewise.
4711         * testsuite/20_util/specialized_algorithms/memory_management_tools/destroy_neg.cc:
4712         Likewise.
4713         * testsuite/20_util/specialized_algorithms/uninitialized_value_construct/94540.cc:
4714         Likewise.
4715         * testsuite/20_util/specialized_algorithms/uninitialized_value_construct/94831.cc:
4716         Likewise.
4717         * testsuite/20_util/specialized_algorithms/uninitialized_value_construct_n/94540.cc:
4718         Likewise.
4719         * testsuite/20_util/specialized_algorithms/uninitialized_value_construct_n/sizes.cc:
4720         Likewise.
4721         * testsuite/20_util/unique_ptr/specialized_algorithms/swap_cxx17.cc:
4722         Likewise.
4723         * testsuite/25_algorithms/clamp/1.cc: Likewise.
4724         * testsuite/25_algorithms/clamp/2.cc: Likewise.
4725         * testsuite/25_algorithms/clamp/constexpr.cc: Likewise.
4726         * testsuite/25_algorithms/clamp/requirements/explicit_instantiation/1.cc:
4727         Likewise.
4728         * testsuite/25_algorithms/clamp/requirements/explicit_instantiation/pod.cc:
4729         Likewise.
4730         * testsuite/25_algorithms/for_each/for_each_n.cc: Likewise.
4731         * testsuite/25_algorithms/for_each/for_each_n_debug.cc:
4732         Likewise.
4733         * testsuite/25_algorithms/sample/1.cc: Likewise.
4734         * testsuite/25_algorithms/sample/2.cc: Likewise.
4735         * testsuite/25_algorithms/sample/3.cc: Likewise.
4736         * testsuite/25_algorithms/sample/81221.cc: Likewise.
4737         * testsuite/25_algorithms/search/searcher.cc: Likewise.
4738         * testsuite/26_numerics/exclusive_scan/1.cc: Likewise.
4739         * testsuite/26_numerics/inclusive_scan/1.cc: Likewise.
4740         * testsuite/26_numerics/reduce/1.cc: Likewise.
4741         * testsuite/26_numerics/reduce/2.cc: Likewise.
4742         * testsuite/26_numerics/transform_exclusive_scan/1.cc: Likewise.
4743         * testsuite/26_numerics/transform_inclusive_scan/1.cc: Likewise.
4744         * testsuite/26_numerics/transform_reduce/1.cc: Likewise.
4745
4746 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
4747
4748         * testsuite/23_containers/array/cons/deduction.cc: Remove
4749         -std=gnu++17 from dg-options directive.
4750         * testsuite/23_containers/array/cons/deduction_neg.cc: Likewise.
4751         * testsuite/23_containers/array/element_access/constexpr_c++17.cc:
4752         Likewise.
4753         * testsuite/23_containers/array/requirements/constexpr_iter.cc:
4754         Likewise.
4755         * testsuite/23_containers/array/specialized_algorithms/swap_cxx17.cc:
4756         Likewise.
4757         * testsuite/23_containers/deque/cons/deduction.cc: Likewise.
4758         * testsuite/23_containers/deque/modifiers/emplace/cxx17_return.cc:
4759         Likewise.
4760         * testsuite/23_containers/forward_list/cons/deduction.cc:
4761         Likewise.
4762         * testsuite/23_containers/forward_list/modifiers/emplace_cxx17_return.cc:
4763         Likewise.
4764         * testsuite/23_containers/list/cons/deduction.cc: Likewise.
4765         * testsuite/23_containers/list/modifiers/emplace/cxx17_return.cc:
4766         Likewise.
4767         * testsuite/23_containers/map/cons/deduction.cc: Likewise.
4768         * testsuite/23_containers/map/modifiers/extract.cc: Likewise.
4769         * testsuite/23_containers/map/modifiers/insert/83226.cc:
4770         Likewise.
4771         * testsuite/23_containers/map/modifiers/insert_or_assign/1.cc:
4772         Likewise.
4773         * testsuite/23_containers/map/modifiers/merge.cc: Likewise.
4774         * testsuite/23_containers/map/modifiers/try_emplace/1.cc:
4775         Likewise.
4776         * testsuite/23_containers/multimap/cons/deduction.cc: Likewise.
4777         * testsuite/23_containers/multimap/modifiers/extract.cc:
4778         Likewise.
4779         * testsuite/23_containers/multimap/modifiers/merge.cc: Likewise.
4780         * testsuite/23_containers/multiset/cons/deduction.cc: Likewise.
4781         * testsuite/23_containers/multiset/modifiers/extract.cc:
4782         Likewise.
4783         * testsuite/23_containers/multiset/modifiers/merge.cc: Likewise.
4784         * testsuite/23_containers/priority_queue/deduction.cc: Likewise.
4785         * testsuite/23_containers/queue/deduction.cc: Likewise.
4786         * testsuite/23_containers/queue/members/emplace_cxx17_return.cc:
4787         Likewise.
4788         * testsuite/23_containers/set/cons/deduction.cc: Likewise.
4789         * testsuite/23_containers/set/modifiers/extract.cc: Likewise.
4790         * testsuite/23_containers/set/modifiers/merge.cc: Likewise.
4791         * testsuite/23_containers/set/modifiers/node_swap.cc: Likewise.
4792         * testsuite/23_containers/stack/deduction.cc: Likewise.
4793         * testsuite/23_containers/stack/members/emplace_cxx17_return.cc:
4794         Likewise.
4795         * testsuite/23_containers/unordered_map/cons/deduction.cc:
4796         Likewise.
4797         * testsuite/23_containers/unordered_map/modifiers/extract.cc:
4798         Likewise.
4799         * testsuite/23_containers/unordered_map/modifiers/insert_or_assign.cc:
4800         Likewise.
4801         * testsuite/23_containers/unordered_map/modifiers/merge.cc:
4802         Likewise.
4803         * testsuite/23_containers/unordered_map/modifiers/try_emplace.cc:
4804         Likewise.
4805         * testsuite/23_containers/unordered_multimap/cons/deduction.cc:
4806         Likewise.
4807         * testsuite/23_containers/unordered_multimap/modifiers/extract.cc:
4808         Likewise.
4809         * testsuite/23_containers/unordered_multimap/modifiers/merge.cc:
4810         Likewise.
4811         * testsuite/23_containers/unordered_multiset/cons/deduction.cc:
4812         Likewise.
4813         * testsuite/23_containers/unordered_multiset/modifiers/extract.cc:
4814         Likewise.
4815         * testsuite/23_containers/unordered_multiset/modifiers/merge.cc:
4816         Likewise.
4817         * testsuite/23_containers/unordered_set/cons/deduction.cc:
4818         Likewise.
4819         * testsuite/23_containers/unordered_set/modifiers/extract.cc:
4820         Likewise.
4821         * testsuite/23_containers/unordered_set/modifiers/merge.cc:
4822         Likewise.
4823         * testsuite/23_containers/vector/bool/emplace_cxx17_return.cc:
4824         Likewise.
4825         * testsuite/23_containers/vector/cons/89164_c++17.cc: Likewise.
4826         * testsuite/23_containers/vector/cons/deduction.cc: Likewise.
4827         * testsuite/23_containers/vector/modifiers/emplace/cxx17_return.cc:
4828         Likewise.
4829
4830 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
4831
4832         * testsuite/21_strings/basic_string/79162.cc: Remove
4833         -std=gnu++17 from dg-options directive.
4834         * testsuite/21_strings/basic_string/cons/char/7.cc: Likewise.
4835         * testsuite/21_strings/basic_string/cons/char/79162.cc:
4836         Likewise.
4837         * testsuite/21_strings/basic_string/cons/char/86138.cc:
4838         Likewise.
4839         * testsuite/21_strings/basic_string/cons/char/9.cc: Likewise.
4840         * testsuite/21_strings/basic_string/cons/char/deduction.cc:
4841         Likewise.
4842         * testsuite/21_strings/basic_string/cons/char/moveable2_c++17.cc:
4843         Likewise.
4844         * testsuite/21_strings/basic_string/cons/wchar_t/7.cc: Likewise.
4845         * testsuite/21_strings/basic_string/cons/wchar_t/79162.cc:
4846         Likewise.
4847         * testsuite/21_strings/basic_string/cons/wchar_t/86138.cc:
4848         Likewise.
4849         * testsuite/21_strings/basic_string/cons/wchar_t/9.cc: Likewise.
4850         * testsuite/21_strings/basic_string/cons/wchar_t/deduction.cc:
4851         Likewise.
4852         * testsuite/21_strings/basic_string/cons/wchar_t/moveable2_c++17.cc:
4853         Likewise.
4854         * testsuite/21_strings/basic_string/hash/hash.cc: Likewise.
4855         * testsuite/21_strings/basic_string/lwg2758.cc: Likewise.
4856         * testsuite/21_strings/basic_string/lwg2946.cc: Likewise.
4857         * testsuite/21_strings/basic_string/modifiers/append/char/4.cc:
4858         Likewise.
4859         * testsuite/21_strings/basic_string/modifiers/append/wchar_t/4.cc:
4860         Likewise.
4861         * testsuite/21_strings/basic_string/modifiers/assign/char/4.cc:
4862         Likewise.
4863         * testsuite/21_strings/basic_string/modifiers/assign/wchar_t/4.cc:
4864         Likewise.
4865         * testsuite/21_strings/basic_string/modifiers/insert/char/3.cc:
4866         Likewise.
4867         * testsuite/21_strings/basic_string/modifiers/insert/wchar_t/3.cc:
4868         Likewise.
4869         * testsuite/21_strings/basic_string/modifiers/replace/char/7.cc:
4870         Likewise.
4871         * testsuite/21_strings/basic_string/modifiers/replace/wchar_t/7.cc:
4872         Likewise.
4873         * testsuite/21_strings/basic_string/operations/compare/char/2.cc:
4874         Likewise.
4875         * testsuite/21_strings/basic_string/operations/compare/wchar_t/2.cc:
4876         Likewise.
4877         * testsuite/21_strings/basic_string/operations/data/char/2.cc:
4878         Likewise.
4879         * testsuite/21_strings/basic_string/operations/data/char/86169.cc:
4880         Likewise.
4881         * testsuite/21_strings/basic_string/operations/data/wchar_t/2.cc:
4882         Likewise.
4883         * testsuite/21_strings/basic_string/operations/find/char/5.cc:
4884         Likewise.
4885         * testsuite/21_strings/basic_string/operations/find/wchar_t/5.cc:
4886         Likewise.
4887         * testsuite/21_strings/basic_string/operators/char/5.cc:
4888         Likewise.
4889         * testsuite/21_strings/basic_string/operators/wchar_t/5.cc:
4890         Likewise.
4891         * testsuite/21_strings/basic_string_view/capacity/1.cc:
4892         Likewise.
4893         * testsuite/21_strings/basic_string_view/capacity/empty_neg.cc:
4894         Likewise.
4895         * testsuite/21_strings/basic_string_view/cons/char/1.cc:
4896         Likewise.
4897         * testsuite/21_strings/basic_string_view/cons/char/2.cc:
4898         Likewise.
4899         * testsuite/21_strings/basic_string_view/cons/char/3.cc:
4900         Likewise.
4901         * testsuite/21_strings/basic_string_view/cons/char/nonnull.cc:
4902         Likewise.
4903         * testsuite/21_strings/basic_string_view/cons/wchar_t/1.cc:
4904         Likewise.
4905         * testsuite/21_strings/basic_string_view/cons/wchar_t/2.cc:
4906         Likewise.
4907         * testsuite/21_strings/basic_string_view/cons/wchar_t/3.cc:
4908         Likewise.
4909         * testsuite/21_strings/basic_string_view/cons/wchar_t/nonnull.cc:
4910         Likewise.
4911         * testsuite/21_strings/basic_string_view/element_access/char/1.cc:
4912         Likewise.
4913         * testsuite/21_strings/basic_string_view/element_access/char/2.cc:
4914         Likewise.
4915         * testsuite/21_strings/basic_string_view/element_access/char/back_constexpr_neg.cc:
4916         Likewise.
4917         * testsuite/21_strings/basic_string_view/element_access/char/constexpr.cc:
4918         Likewise.
4919         * testsuite/21_strings/basic_string_view/element_access/char/constexpr_neg.cc:
4920         Likewise.
4921         * testsuite/21_strings/basic_string_view/element_access/char/empty.cc:
4922         Likewise.
4923         * testsuite/21_strings/basic_string_view/element_access/char/front_back.cc:
4924         Likewise.
4925         * testsuite/21_strings/basic_string_view/element_access/char/front_back_constexpr.cc:
4926         Likewise.
4927         * testsuite/21_strings/basic_string_view/element_access/char/front_constexpr_neg.cc:
4928         Likewise.
4929         * testsuite/21_strings/basic_string_view/element_access/wchar_t/1.cc:
4930         Likewise.
4931         * testsuite/21_strings/basic_string_view/element_access/wchar_t/2.cc:
4932         Likewise.
4933         * testsuite/21_strings/basic_string_view/element_access/wchar_t/back_constexpr_neg.cc:
4934         Likewise.
4935         * testsuite/21_strings/basic_string_view/element_access/wchar_t/constexpr.cc:
4936         Likewise.
4937         * testsuite/21_strings/basic_string_view/element_access/wchar_t/constexpr_neg.cc:
4938         Likewise.
4939         * testsuite/21_strings/basic_string_view/element_access/wchar_t/empty.cc:
4940         Likewise.
4941         * testsuite/21_strings/basic_string_view/element_access/wchar_t/front_back.cc:
4942         Likewise.
4943         * testsuite/21_strings/basic_string_view/element_access/wchar_t/front_constexpr_neg.cc:
4944         Likewise.
4945         * testsuite/21_strings/basic_string_view/include.cc: Likewise.
4946         * testsuite/21_strings/basic_string_view/inserters/94051.cc:
4947         Likewise.
4948         * testsuite/21_strings/basic_string_view/inserters/char/1.cc:
4949         Likewise.
4950         * testsuite/21_strings/basic_string_view/inserters/char/2.cc:
4951         Likewise.
4952         * testsuite/21_strings/basic_string_view/inserters/char/3.cc:
4953         Likewise.
4954         * testsuite/21_strings/basic_string_view/inserters/pod/10081-out.cc:
4955         Likewise.
4956         * testsuite/21_strings/basic_string_view/inserters/wchar_t/1.cc:
4957         Likewise.
4958         * testsuite/21_strings/basic_string_view/inserters/wchar_t/2.cc:
4959         Likewise.
4960         * testsuite/21_strings/basic_string_view/inserters/wchar_t/3.cc:
4961         Likewise.
4962         * testsuite/21_strings/basic_string_view/literals/types-char8_t.cc:
4963         Likewise.
4964         * testsuite/21_strings/basic_string_view/literals/types.cc:
4965         Likewise.
4966         * testsuite/21_strings/basic_string_view/literals/values-char8_t.cc:
4967         Likewise.
4968         * testsuite/21_strings/basic_string_view/literals/values.cc:
4969         Likewise.
4970         * testsuite/21_strings/basic_string_view/modifiers/remove_prefix/char/1.cc:
4971         Likewise.
4972         * testsuite/21_strings/basic_string_view/modifiers/remove_prefix/wchar_t/1.cc:
4973         Likewise.
4974         * testsuite/21_strings/basic_string_view/modifiers/remove_suffix/char/1.cc:
4975         Likewise.
4976         * testsuite/21_strings/basic_string_view/modifiers/remove_suffix/wchar_t/1.cc:
4977         Likewise.
4978         * testsuite/21_strings/basic_string_view/modifiers/swap/char/1.cc:
4979         Likewise.
4980         * testsuite/21_strings/basic_string_view/modifiers/swap/wchar_t/1.cc:
4981         Likewise.
4982         * testsuite/21_strings/basic_string_view/operations/compare/char/1.cc:
4983         Likewise.
4984         * testsuite/21_strings/basic_string_view/operations/compare/char/13650.cc:
4985         Likewise.
4986         * testsuite/21_strings/basic_string_view/operations/compare/char/2.cc:
4987         Likewise.
4988         * testsuite/21_strings/basic_string_view/operations/compare/char/70483.cc:
4989         Likewise.
4990         * testsuite/21_strings/basic_string_view/operations/compare/char/nonnull.cc:
4991         Likewise.
4992         * testsuite/21_strings/basic_string_view/operations/compare/wchar_t/1.cc:
4993         Likewise.
4994         * testsuite/21_strings/basic_string_view/operations/compare/wchar_t/13650.cc:
4995         Likewise.
4996         * testsuite/21_strings/basic_string_view/operations/compare/wchar_t/2.cc:
4997         Likewise.
4998         * testsuite/21_strings/basic_string_view/operations/copy/char/1.cc:
4999         Likewise.
5000         * testsuite/21_strings/basic_string_view/operations/copy/char/2.cc:
5001         Likewise.
5002         * testsuite/21_strings/basic_string_view/operations/copy/wchar_t/1.cc:
5003         Likewise.
5004         * testsuite/21_strings/basic_string_view/operations/copy/wchar_t/2.cc:
5005         Likewise.
5006         * testsuite/21_strings/basic_string_view/operations/data/char/1.cc:
5007         Likewise.
5008         * testsuite/21_strings/basic_string_view/operations/data/wchar_t/1.cc:
5009         Likewise.
5010         * testsuite/21_strings/basic_string_view/operations/find/char/1.cc:
5011         Likewise.
5012         * testsuite/21_strings/basic_string_view/operations/find/char/2.cc:
5013         Likewise.
5014         * testsuite/21_strings/basic_string_view/operations/find/char/3.cc:
5015         Likewise.
5016         * testsuite/21_strings/basic_string_view/operations/find/char/4.cc:
5017         Likewise.
5018         * testsuite/21_strings/basic_string_view/operations/find/char/nonnull.cc:
5019         Likewise.
5020         * testsuite/21_strings/basic_string_view/operations/find/wchar_t/1.cc:
5021         Likewise.
5022         * testsuite/21_strings/basic_string_view/operations/find/wchar_t/2.cc:
5023         Likewise.
5024         * testsuite/21_strings/basic_string_view/operations/find/wchar_t/3.cc:
5025         Likewise.
5026         * testsuite/21_strings/basic_string_view/operations/find/wchar_t/4.cc:
5027         Likewise.
5028         * testsuite/21_strings/basic_string_view/operations/rfind/char/1.cc:
5029         Likewise.
5030         * testsuite/21_strings/basic_string_view/operations/rfind/char/2.cc:
5031         Likewise.
5032         * testsuite/21_strings/basic_string_view/operations/rfind/char/3.cc:
5033         Likewise.
5034         * testsuite/21_strings/basic_string_view/operations/rfind/char/nonnull.cc:
5035         Likewise.
5036         * testsuite/21_strings/basic_string_view/operations/rfind/wchar_t/1.cc:
5037         Likewise.
5038         * testsuite/21_strings/basic_string_view/operations/rfind/wchar_t/2.cc:
5039         Likewise.
5040         * testsuite/21_strings/basic_string_view/operations/rfind/wchar_t/3.cc:
5041         Likewise.
5042         * testsuite/21_strings/basic_string_view/operations/string_conversion/1.cc:
5043         Likewise.
5044         * testsuite/21_strings/basic_string_view/operations/substr/char/1.cc:
5045         Likewise.
5046         * testsuite/21_strings/basic_string_view/operations/substr/char/83511.cc:
5047         Likewise.
5048         * testsuite/21_strings/basic_string_view/operations/substr/wchar_t/1.cc:
5049         Likewise.
5050         * testsuite/21_strings/basic_string_view/operations/substr/wchar_t/83511.cc:
5051         Likewise.
5052         * testsuite/21_strings/basic_string_view/operators/char/2.cc:
5053         Likewise.
5054         * testsuite/21_strings/basic_string_view/operators/char/89446.cc:
5055         Likewise.
5056         * testsuite/21_strings/basic_string_view/operators/wchar_t/2.cc:
5057         Likewise.
5058         * testsuite/21_strings/basic_string_view/operators/wchar_t/89446.cc:
5059         Likewise.
5060         * testsuite/21_strings/basic_string_view/range_access/char/1.cc:
5061         Likewise.
5062         * testsuite/21_strings/basic_string_view/range_access/wchar_t/1.cc:
5063         Likewise.
5064         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/1.cc:
5065         Likewise.
5066         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/char/1.cc:
5067         Likewise.
5068         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/char16_t/1.cc:
5069         Likewise.
5070         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/char32_t/1.cc:
5071         Likewise.
5072         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/char8_t/1.cc:
5073         Likewise.
5074         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/wchar_t/1.cc:
5075         Likewise.
5076         * testsuite/21_strings/basic_string_view/requirements/traits_neg.cc:
5077         Likewise.
5078         * testsuite/21_strings/basic_string_view/requirements/typedefs.cc:
5079         Likewise.
5080         * testsuite/21_strings/basic_string_view/typedefs.cc: Likewise.
5081         * testsuite/21_strings/basic_string_view/types/1.cc: Likewise.
5082         * testsuite/21_strings/char_traits/requirements/char/99181.cc:
5083         Likewise.
5084         * testsuite/21_strings/char_traits/requirements/constexpr_functions_c++17.cc:
5085
5086 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
5087
5088         * testsuite/20_util/memory_resource/1.cc: Remove -std=gnu++17
5089         from dg-options directive.
5090         * testsuite/20_util/memory_resource/2.cc: Likewise.
5091         * testsuite/20_util/monotonic_buffer_resource/1.cc: Likewise.
5092         * testsuite/20_util/monotonic_buffer_resource/93208.cc:
5093         Likewise.
5094         * testsuite/20_util/monotonic_buffer_resource/allocate.cc:
5095         Likewise.
5096         * testsuite/20_util/monotonic_buffer_resource/deallocate.cc:
5097         Likewise.
5098         * testsuite/20_util/monotonic_buffer_resource/release.cc:
5099         Likewise.
5100         * testsuite/20_util/monotonic_buffer_resource/upstream_resource.cc:
5101         Likewise.
5102         * testsuite/20_util/polymorphic_allocator/1.cc: Likewise.
5103         * testsuite/20_util/polymorphic_allocator/construct_pair.cc:
5104         Likewise.
5105         * testsuite/20_util/polymorphic_allocator/resource.cc: Likewise.
5106         * testsuite/20_util/polymorphic_allocator/select.cc: Likewise.
5107         * testsuite/20_util/synchronized_pool_resource/allocate.cc:
5108         Likewise.
5109         * testsuite/20_util/synchronized_pool_resource/allocate_single.cc:
5110         Likewise.
5111         * testsuite/20_util/synchronized_pool_resource/cons.cc:
5112         Likewise.
5113         * testsuite/20_util/synchronized_pool_resource/cons_single.cc:
5114         Likewise.
5115         * testsuite/20_util/synchronized_pool_resource/is_equal.cc:
5116         Likewise.
5117         * testsuite/20_util/synchronized_pool_resource/multithreaded.cc:
5118         Likewise.
5119         * testsuite/20_util/synchronized_pool_resource/options.cc:
5120         Likewise.
5121         * testsuite/20_util/synchronized_pool_resource/release.cc:
5122         Likewise.
5123         * testsuite/20_util/synchronized_pool_resource/release_single.cc:
5124         Likewise.
5125         * testsuite/20_util/unsynchronized_pool_resource/allocate-max-chunks.cc:
5126         Likewise.
5127         * testsuite/20_util/unsynchronized_pool_resource/allocate.cc:
5128         Likewise.
5129         * testsuite/20_util/unsynchronized_pool_resource/cons.cc:
5130         Likewise.
5131         * testsuite/20_util/unsynchronized_pool_resource/is_equal.cc:
5132         Likewise.
5133         * testsuite/20_util/unsynchronized_pool_resource/options.cc:
5134         Likewise.
5135         * testsuite/20_util/unsynchronized_pool_resource/release.cc:
5136         Likewise.
5137         * testsuite/21_strings/basic_string/types/pmr_typedefs.cc:
5138         Likewise.
5139         * testsuite/23_containers/deque/types/pmr_typedefs.cc: Likewise.
5140         * testsuite/23_containers/deque/types/pmr_typedefs_debug.cc:
5141         Likewise.
5142         * testsuite/23_containers/forward_list/pmr_typedefs.cc:
5143         Likewise.
5144         * testsuite/23_containers/forward_list/pmr_typedefs_debug.cc:
5145         Likewise.
5146         * testsuite/23_containers/list/pmr_typedefs.cc: Likewise.
5147         * testsuite/23_containers/list/pmr_typedefs_debug.cc: Likewise.
5148         * testsuite/23_containers/map/pmr_typedefs.cc: Likewise.
5149         * testsuite/23_containers/map/pmr_typedefs_debug.cc: Likewise.
5150         * testsuite/23_containers/multimap/pmr_typedefs.cc: Likewise.
5151         * testsuite/23_containers/multimap/pmr_typedefs_debug.cc:
5152         Likewise.
5153         * testsuite/23_containers/multiset/pmr_typedefs.cc: Likewise.
5154         * testsuite/23_containers/multiset/pmr_typedefs_debug.cc:
5155         Likewise.
5156         * testsuite/23_containers/set/pmr_typedefs.cc: Likewise.
5157         * testsuite/23_containers/set/pmr_typedefs_debug.cc: Likewise.
5158         * testsuite/23_containers/unordered_map/pmr_typedefs.cc:
5159         Likewise.
5160         * testsuite/23_containers/unordered_map/pmr_typedefs_debug.cc:
5161         Likewise.
5162         * testsuite/23_containers/unordered_multimap/pmr_typedefs.cc:
5163         Likewise.
5164         * testsuite/23_containers/unordered_multimap/pmr_typedefs_debug.cc:
5165         Likewise.
5166         * testsuite/23_containers/unordered_multiset/pmr_typedefs.cc:
5167         Likewise.
5168         * testsuite/23_containers/unordered_multiset/pmr_typedefs_debug.cc:
5169         Likewise.
5170         * testsuite/23_containers/unordered_set/pmr_typedefs.cc:
5171         Likewise.
5172         * testsuite/23_containers/unordered_set/pmr_typedefs_debug.cc:
5173         Likewise.
5174         * testsuite/23_containers/vector/pmr_typedefs.cc: Likewise.
5175         * testsuite/23_containers/vector/types/pmr_typedefs_debug.cc:
5176         Likewise.
5177         * testsuite/28_regex/match_results/pmr_typedefs.cc: Likewise.
5178
5179 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
5180
5181         * testsuite/29_atomics/atomic/69769.cc: Remove -std=gnu++17 from
5182         dg-options.
5183         * testsuite/29_atomics/atomic/is_always_lock_free.cc:
5184         * testsuite/29_atomics/atomic/requirements/typedefs.cc:
5185         * testsuite/29_atomics/atomic_integral/is_always_lock_free.cc:
5186         * testsuite/29_atomics/atomic_integral/requirements/typedefs.cc:
5187         * testsuite/30_threads/lock_guard/cons/deduction.cc: Likewise.
5188         * testsuite/30_threads/scoped_lock/cons/1.cc: Likewise.
5189         * testsuite/30_threads/scoped_lock/cons/deduction.cc: Likewise.
5190         * testsuite/30_threads/scoped_lock/requirements/explicit_instantiation.cc:
5191         Likewise.
5192         * testsuite/30_threads/scoped_lock/requirements/typedefs.cc:
5193         Likewise.
5194         * testsuite/30_threads/shared_lock/70766.cc: Likewise.
5195         * testsuite/30_threads/shared_mutex/cons/1.cc: Likewise.
5196         * testsuite/30_threads/shared_mutex/cons/assign_neg.cc:
5197         Likewise.
5198         * testsuite/30_threads/shared_mutex/cons/copy_neg.cc: Likewise.
5199         * testsuite/30_threads/shared_mutex/requirements/standard_layout.cc:
5200         Likewise.
5201         * testsuite/30_threads/shared_mutex/try_lock/1.cc: Likewise.
5202         * testsuite/30_threads/shared_mutex/try_lock/2.cc: Likewise.
5203         * testsuite/30_threads/shared_mutex/unlock/1.cc: Likewise.
5204         * testsuite/30_threads/unique_lock/cons/deduction.cc: Likewise.
5205
5206 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
5207
5208         * testsuite/20_util/any/assign/1.cc: Remove -std=gnu++17 from
5209         dg-options directive.
5210         * testsuite/20_util/any/assign/2.cc: Likewise.
5211         * testsuite/20_util/any/assign/emplace.cc: Likewise.
5212         * testsuite/20_util/any/assign/exception.cc: Likewise.
5213         * testsuite/20_util/any/assign/self.cc: Likewise.
5214         * testsuite/20_util/any/cons/1.cc: Likewise.
5215         * testsuite/20_util/any/cons/2.cc: Likewise.
5216         * testsuite/20_util/any/cons/90415.cc: Likewise.
5217         * testsuite/20_util/any/cons/92156.cc: Likewise.
5218         * testsuite/20_util/any/cons/aligned.cc: Likewise.
5219         * testsuite/20_util/any/cons/explicit.cc: Likewise.
5220         * testsuite/20_util/any/cons/in_place.cc: Likewise.
5221         * testsuite/20_util/any/cons/nontrivial.cc: Likewise.
5222         * testsuite/20_util/any/make_any.cc: Likewise.
5223         * testsuite/20_util/any/misc/any_cast.cc: Likewise.
5224         * testsuite/20_util/any/misc/any_cast_neg.cc: Likewise.
5225         * testsuite/20_util/any/misc/any_cast_no_rtti.cc: Likewise.
5226         * testsuite/20_util/any/misc/swap.cc: Likewise.
5227         * testsuite/20_util/any/modifiers/1.cc: Likewise.
5228         * testsuite/20_util/any/modifiers/83658.cc: Likewise.
5229         * testsuite/20_util/any/modifiers/92156.cc: Likewise.
5230         * testsuite/20_util/any/observers/type.cc: Likewise.
5231         * testsuite/20_util/any/requirements.cc: Likewise.
5232         * testsuite/20_util/any/typedefs.cc: Likewise.
5233         * testsuite/20_util/optional/77288.cc: Likewise.
5234         * testsuite/20_util/optional/84601.cc: Likewise.
5235         * testsuite/20_util/optional/assignment/1.cc: Likewise.
5236         * testsuite/20_util/optional/assignment/2.cc: Likewise.
5237         * testsuite/20_util/optional/assignment/3.cc: Likewise.
5238         * testsuite/20_util/optional/assignment/4.cc: Likewise.
5239         * testsuite/20_util/optional/assignment/5.cc: Likewise.
5240         * testsuite/20_util/optional/assignment/6.cc: Likewise.
5241         * testsuite/20_util/optional/assignment/7.cc: Likewise.
5242         * testsuite/20_util/optional/assignment/8.cc: Likewise.
5243         * testsuite/20_util/optional/assignment/9.cc: Likewise.
5244         * testsuite/20_util/optional/bad_access.cc: Likewise.
5245         * testsuite/20_util/optional/cons/77727.cc: Likewise.
5246         * testsuite/20_util/optional/cons/85642.cc: Likewise.
5247         * testsuite/20_util/optional/cons/copy.cc: Likewise.
5248         * testsuite/20_util/optional/cons/deduction.cc: Likewise.
5249         * testsuite/20_util/optional/cons/default.cc: Likewise.
5250         * testsuite/20_util/optional/cons/move.cc: Likewise.
5251         * testsuite/20_util/optional/cons/trivial.cc: Likewise.
5252         * testsuite/20_util/optional/cons/value.cc: Likewise.
5253         * testsuite/20_util/optional/cons/value_neg.cc: Likewise.
5254         * testsuite/20_util/optional/constexpr/cons/default.cc:
5255         Likewise.
5256         * testsuite/20_util/optional/constexpr/cons/value.cc: Likewise.
5257         * testsuite/20_util/optional/constexpr/in_place.cc: Likewise.
5258         * testsuite/20_util/optional/constexpr/make_optional.cc:
5259         Likewise.
5260         * testsuite/20_util/optional/constexpr/nullopt.cc: Likewise.
5261         * testsuite/20_util/optional/constexpr/observers/1.cc: Likewise.
5262         * testsuite/20_util/optional/constexpr/observers/2.cc: Likewise.
5263         * testsuite/20_util/optional/constexpr/observers/3.cc: Likewise.
5264         * testsuite/20_util/optional/constexpr/observers/4.cc: Likewise.
5265         * testsuite/20_util/optional/constexpr/observers/5.cc: Likewise.
5266         * testsuite/20_util/optional/constexpr/relops/1.cc: Likewise.
5267         * testsuite/20_util/optional/constexpr/relops/2.cc: Likewise.
5268         * testsuite/20_util/optional/constexpr/relops/3.cc: Likewise.
5269         * testsuite/20_util/optional/constexpr/relops/4.cc: Likewise.
5270         * testsuite/20_util/optional/constexpr/relops/5.cc: Likewise.
5271         * testsuite/20_util/optional/constexpr/relops/6.cc: Likewise.
5272         * testsuite/20_util/optional/hash.cc: Likewise.
5273         * testsuite/20_util/optional/in_place.cc: Likewise.
5274         * testsuite/20_util/optional/make_optional.cc: Likewise.
5275         * testsuite/20_util/optional/nullopt.cc: Likewise.
5276         * testsuite/20_util/optional/observers/1.cc: Likewise.
5277         * testsuite/20_util/optional/observers/2.cc: Likewise.
5278         * testsuite/20_util/optional/observers/3.cc: Likewise.
5279         * testsuite/20_util/optional/observers/4.cc: Likewise.
5280         * testsuite/20_util/optional/observers/5.cc: Likewise.
5281         * testsuite/20_util/optional/observers/6.cc: Likewise.
5282         * testsuite/20_util/optional/relops/1.cc: Likewise.
5283         * testsuite/20_util/optional/relops/2.cc: Likewise.
5284         * testsuite/20_util/optional/relops/3.cc: Likewise.
5285         * testsuite/20_util/optional/relops/4.cc: Likewise.
5286         * testsuite/20_util/optional/relops/5.cc: Likewise.
5287         * testsuite/20_util/optional/relops/6.cc: Likewise.
5288         * testsuite/20_util/optional/relops/7.cc: Likewise.
5289         * testsuite/20_util/optional/requirements.cc: Likewise.
5290         * testsuite/20_util/optional/swap/1.cc: Likewise.
5291         * testsuite/20_util/optional/swap/2.cc: Likewise.
5292         * testsuite/20_util/optional/typedefs.cc: Likewise.
5293         * testsuite/20_util/variant/80165.cc: Likewise.
5294         * testsuite/20_util/variant/85183.cc: Likewise.
5295         * testsuite/20_util/variant/86874.cc: Likewise.
5296         * testsuite/20_util/variant/87431.cc: Likewise.
5297         * testsuite/20_util/variant/87619.cc: Likewise.
5298         * testsuite/20_util/variant/91807.cc: Likewise.
5299         * testsuite/20_util/variant/any.cc: Likewise.
5300         * testsuite/20_util/variant/compile.cc: Likewise.
5301         * testsuite/20_util/variant/deduction.cc: Likewise.
5302         * testsuite/20_util/variant/exception_safety.cc: Likewise.
5303         * testsuite/20_util/variant/hash.cc: Likewise.
5304         * testsuite/20_util/variant/index_type.cc: Likewise.
5305         * testsuite/20_util/variant/relops/89851.cc: Likewise.
5306         * testsuite/20_util/variant/relops/90008.cc: Likewise.
5307         * testsuite/20_util/variant/run.cc: Likewise.
5308         * testsuite/20_util/variant/visit.cc: Likewise.
5309
5310 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
5311
5312         * testsuite/27_io/basic_filebuf/open/char/path.cc: Remove
5313         -std=gnu++17 from dg-options directive.
5314         * testsuite/27_io/basic_fstream/cons/char/path.cc: Likewise.
5315         * testsuite/27_io/basic_fstream/open/char/path.cc: Likewise.
5316         * testsuite/27_io/basic_ifstream/cons/char/path.cc: Likewise.
5317         * testsuite/27_io/basic_ifstream/open/char/path.cc: Likewise.
5318         * testsuite/27_io/basic_ofstream/cons/char/path.cc: Likewise.
5319         * testsuite/27_io/basic_ofstream/open/char/path.cc: Likewise.
5320         * testsuite/27_io/filesystem/directory_entry/86597.cc: Likewise.
5321         * testsuite/27_io/filesystem/directory_entry/lwg3171.cc:
5322         Likewise.
5323         * testsuite/27_io/filesystem/file_status/1.cc: Likewise.
5324         * testsuite/27_io/filesystem/filesystem_error/cons.cc: Likewise.
5325         * testsuite/27_io/filesystem/filesystem_error/copy.cc: Likewise.
5326         * testsuite/27_io/filesystem/iterators/91067.cc: Likewise.
5327         * testsuite/27_io/filesystem/iterators/caching.cc: Likewise.
5328         * testsuite/27_io/filesystem/iterators/directory_iterator.cc:
5329         Likewise.
5330         * testsuite/27_io/filesystem/iterators/pop.cc: Likewise.
5331         * testsuite/27_io/filesystem/iterators/recursion_pending.cc:
5332         Likewise.
5333         * testsuite/27_io/filesystem/iterators/recursive_directory_iterator.cc:
5334         Likewise.
5335         * testsuite/27_io/filesystem/operations/absolute.cc: Likewise.
5336         * testsuite/27_io/filesystem/operations/all.cc: Likewise.
5337         * testsuite/27_io/filesystem/operations/canonical.cc: Likewise.
5338         * testsuite/27_io/filesystem/operations/copy.cc: Likewise.
5339         * testsuite/27_io/filesystem/operations/copy_file.cc: Likewise.
5340         * testsuite/27_io/filesystem/operations/create_directories.cc:
5341         Likewise.
5342         * testsuite/27_io/filesystem/operations/create_directory.cc:
5343         Likewise.
5344         * testsuite/27_io/filesystem/operations/create_symlink.cc:
5345         Likewise.
5346         * testsuite/27_io/filesystem/operations/current_path.cc:
5347         Likewise.
5348         * testsuite/27_io/filesystem/operations/equivalent.cc: Likewise.
5349         * testsuite/27_io/filesystem/operations/exists.cc: Likewise.
5350         * testsuite/27_io/filesystem/operations/file_size.cc: Likewise.
5351         * testsuite/27_io/filesystem/operations/is_empty.cc: Likewise.
5352         * testsuite/27_io/filesystem/operations/last_write_time.cc:
5353         Likewise.
5354         * testsuite/27_io/filesystem/operations/permissions.cc:
5355         Likewise.
5356         * testsuite/27_io/filesystem/operations/proximate.cc: Likewise.
5357         * testsuite/27_io/filesystem/operations/read_symlink.cc:
5358         Likewise.
5359         * testsuite/27_io/filesystem/operations/relative.cc: Likewise.
5360         * testsuite/27_io/filesystem/operations/remove.cc: Likewise.
5361         * testsuite/27_io/filesystem/operations/remove_all.cc: Likewise.
5362         * testsuite/27_io/filesystem/operations/rename.cc: Likewise.
5363         * testsuite/27_io/filesystem/operations/resize_file.cc:
5364         Likewise.
5365         * testsuite/27_io/filesystem/operations/space.cc: Likewise.
5366         * testsuite/27_io/filesystem/operations/status.cc: Likewise.
5367         * testsuite/27_io/filesystem/operations/symlink_status.cc:
5368         Likewise.
5369         * testsuite/27_io/filesystem/operations/temp_directory_path.cc:
5370         Likewise.
5371         * testsuite/27_io/filesystem/operations/weakly_canonical.cc:
5372         Likewise.
5373         * testsuite/27_io/filesystem/path/append/path.cc: Likewise.
5374         * testsuite/27_io/filesystem/path/append/source.cc: Likewise.
5375         * testsuite/27_io/filesystem/path/assign/assign.cc: Likewise.
5376         * testsuite/27_io/filesystem/path/assign/copy.cc: Likewise.
5377         * testsuite/27_io/filesystem/path/compare/compare.cc: Likewise.
5378         * testsuite/27_io/filesystem/path/compare/lwg2936.cc: Likewise.
5379         * testsuite/27_io/filesystem/path/compare/path.cc: Likewise.
5380         * testsuite/27_io/filesystem/path/compare/strings.cc: Likewise.
5381         * testsuite/27_io/filesystem/path/concat/92853.cc: Likewise.
5382         * testsuite/27_io/filesystem/path/concat/94063.cc: Likewise.
5383         * testsuite/27_io/filesystem/path/concat/path.cc: Likewise.
5384         * testsuite/27_io/filesystem/path/concat/strings.cc: Likewise.
5385         * testsuite/27_io/filesystem/path/construct/80762.cc: Likewise.
5386         * testsuite/27_io/filesystem/path/construct/90281.cc: Likewise.
5387         * testsuite/27_io/filesystem/path/construct/90634.cc: Likewise.
5388         * testsuite/27_io/filesystem/path/construct/copy.cc: Likewise.
5389         * testsuite/27_io/filesystem/path/construct/default.cc:
5390         Likewise.
5391         * testsuite/27_io/filesystem/path/construct/format.cc: Likewise.
5392         * testsuite/27_io/filesystem/path/construct/locale.cc: Likewise.
5393         * testsuite/27_io/filesystem/path/construct/range.cc: Likewise.
5394         * testsuite/27_io/filesystem/path/construct/string_view.cc:
5395         Likewise.
5396         * testsuite/27_io/filesystem/path/decompose/extension.cc:
5397         Likewise.
5398         * testsuite/27_io/filesystem/path/decompose/filename.cc:
5399         Likewise.
5400         * testsuite/27_io/filesystem/path/decompose/parent_path.cc:
5401         Likewise.
5402         * testsuite/27_io/filesystem/path/decompose/relative_path.cc:
5403         Likewise.
5404         * testsuite/27_io/filesystem/path/decompose/root_directory.cc:
5405         Likewise.
5406         * testsuite/27_io/filesystem/path/decompose/root_name.cc:
5407         Likewise.
5408         * testsuite/27_io/filesystem/path/decompose/root_path.cc:
5409         Likewise.
5410         * testsuite/27_io/filesystem/path/decompose/stem.cc: Likewise.
5411         * testsuite/27_io/filesystem/path/factory/u8path-char8_t.cc:
5412         Likewise.
5413         * testsuite/27_io/filesystem/path/factory/u8path.cc: Likewise.
5414         * testsuite/27_io/filesystem/path/generation/normal.cc:
5415         Likewise.
5416         * testsuite/27_io/filesystem/path/generation/normal2.cc:
5417         Likewise.
5418         * testsuite/27_io/filesystem/path/generation/proximate.cc:
5419         Likewise.
5420         * testsuite/27_io/filesystem/path/generation/relative.cc:
5421         Likewise.
5422         * testsuite/27_io/filesystem/path/generic/94242.cc: Likewise.
5423         * testsuite/27_io/filesystem/path/generic/generic_string.cc:
5424         Likewise.
5425         * testsuite/27_io/filesystem/path/generic/utf.cc: Likewise.
5426         * testsuite/27_io/filesystem/path/generic/wchar_t.cc: Likewise.
5427         * testsuite/27_io/filesystem/path/io/dr2989.cc: Likewise.
5428         * testsuite/27_io/filesystem/path/itr/components.cc: Likewise.
5429         * testsuite/27_io/filesystem/path/itr/traversal.cc: Likewise.
5430         * testsuite/27_io/filesystem/path/modifiers/clear.cc: Likewise.
5431         * testsuite/27_io/filesystem/path/modifiers/make_preferred.cc:
5432         Likewise.
5433         * testsuite/27_io/filesystem/path/modifiers/remove_filename.cc:
5434         Likewise.
5435         * testsuite/27_io/filesystem/path/modifiers/replace_extension.cc:
5436         Likewise.
5437         * testsuite/27_io/filesystem/path/modifiers/replace_filename.cc:
5438         Likewise.
5439         * testsuite/27_io/filesystem/path/modifiers/swap.cc: Likewise.
5440         * testsuite/27_io/filesystem/path/native/alloc.cc: Likewise.
5441         * testsuite/27_io/filesystem/path/native/string-char8_t.cc:
5442         Likewise.
5443         * testsuite/27_io/filesystem/path/native/string.cc: Likewise.
5444         * testsuite/27_io/filesystem/path/nonmember/append.cc: Likewise.
5445         * testsuite/27_io/filesystem/path/nonmember/cmp.cc: Likewise.
5446         * testsuite/27_io/filesystem/path/nonmember/hash_value.cc:
5447         Likewise.
5448         * testsuite/27_io/filesystem/path/query/empty.cc: Likewise.
5449         * testsuite/27_io/filesystem/path/query/empty_neg.cc:
5450         * testsuite/27_io/filesystem/path/query/has_extension.cc:
5451         Likewise.
5452         * testsuite/27_io/filesystem/path/query/has_filename.cc:
5453         Likewise.
5454         * testsuite/27_io/filesystem/path/query/has_parent_path.cc:
5455         Likewise.
5456         * testsuite/27_io/filesystem/path/query/has_relative_path.cc:
5457         Likewise.
5458         * testsuite/27_io/filesystem/path/query/has_root_directory.cc:
5459         Likewise.
5460         * testsuite/27_io/filesystem/path/query/has_root_name.cc:
5461         Likewise.
5462         * testsuite/27_io/filesystem/path/query/has_root_path.cc:
5463         Likewise.
5464         * testsuite/27_io/filesystem/path/query/has_stem.cc: Likewise.
5465         * testsuite/27_io/filesystem/path/query/is_absolute.cc:
5466         Likewise.
5467         * testsuite/27_io/filesystem/path/query/is_relative.cc:
5468         Likewise.
5469         * testsuite/experimental/filesystem/path/construct/string_view.cc:
5470         Likewise.
5471
5472 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
5473
5474         * testsuite/20_util/specialized_algorithms/pstl/uninitialized_construct.cc:
5475         Remove -std=gnu++17 from dg-options.
5476         * testsuite/20_util/specialized_algorithms/pstl/uninitialized_copy_move.cc:
5477         Likewise.
5478         * testsuite/20_util/specialized_algorithms/pstl/uninitialized_fill_destroy.cc:
5479         Likewise.
5480         * testsuite/25_algorithms/pstl/alg_merge/inplace_merge.cc:
5481         Likewise.
5482         * testsuite/25_algorithms/pstl/alg_merge/merge.cc: Likewise.
5483         * testsuite/25_algorithms/pstl/alg_modifying_operations/copy_if.cc:
5484         Likewise.
5485         * testsuite/25_algorithms/pstl/alg_modifying_operations/copy_move.cc:
5486         Likewise.
5487         * testsuite/25_algorithms/pstl/alg_modifying_operations/fill.cc:
5488         Likewise.
5489         * testsuite/25_algorithms/pstl/alg_modifying_operations/generate.cc:
5490         Likewise.
5491         * testsuite/25_algorithms/pstl/alg_modifying_operations/is_partitioned.cc:
5492         Likewise.
5493         * testsuite/25_algorithms/pstl/alg_modifying_operations/partition.cc:
5494         Likewise.
5495         * testsuite/25_algorithms/pstl/alg_modifying_operations/partition_copy.cc:
5496         Likewise.
5497         * testsuite/25_algorithms/pstl/alg_modifying_operations/remove.cc:
5498         Likewise.
5499         * testsuite/25_algorithms/pstl/alg_modifying_operations/remove_copy.cc:
5500         Likewise.
5501         * testsuite/25_algorithms/pstl/alg_modifying_operations/replace.cc:
5502         Likewise.
5503         * testsuite/25_algorithms/pstl/alg_modifying_operations/replace_copy.cc:
5504         Likewise.
5505         * testsuite/25_algorithms/pstl/alg_modifying_operations/rotate.cc:
5506         Likewise.
5507         * testsuite/25_algorithms/pstl/alg_modifying_operations/rotate_copy.cc:
5508         Likewise.
5509         * testsuite/25_algorithms/pstl/alg_modifying_operations/swap_ranges.cc:
5510         Likewise.
5511         * testsuite/25_algorithms/pstl/alg_modifying_operations/transform_binary.cc:
5512         Likewise.
5513         * testsuite/25_algorithms/pstl/alg_modifying_operations/transform_unary.cc:
5514         Likewise.
5515         * testsuite/25_algorithms/pstl/alg_modifying_operations/unique.cc:
5516         Likewise.
5517         * testsuite/25_algorithms/pstl/alg_modifying_operations/unique_copy_equal.cc:
5518         Likewise.
5519         * testsuite/25_algorithms/pstl/alg_nonmodifying/adjacent_find.cc:
5520         Likewise.
5521         * testsuite/25_algorithms/pstl/alg_nonmodifying/all_of.cc:
5522         Likewise.
5523         * testsuite/25_algorithms/pstl/alg_nonmodifying/any_of.cc:
5524         Likewise.
5525         * testsuite/25_algorithms/pstl/alg_nonmodifying/count.cc:
5526         Likewise.
5527         * testsuite/25_algorithms/pstl/alg_nonmodifying/equal.cc:
5528         Likewise.
5529         * testsuite/25_algorithms/pstl/alg_nonmodifying/find.cc:
5530         Likewise.
5531         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_end.cc:
5532         Likewise.
5533         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_first_of.cc:
5534         Likewise.
5535         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_if.cc:
5536         Likewise.
5537         * testsuite/25_algorithms/pstl/alg_nonmodifying/for_each.cc:
5538         Likewise.
5539         * testsuite/25_algorithms/pstl/alg_nonmodifying/mismatch.cc:
5540         Likewise.
5541         * testsuite/25_algorithms/pstl/alg_nonmodifying/none_of.cc:
5542         Likewise.
5543         * testsuite/25_algorithms/pstl/alg_nonmodifying/nth_element.cc:
5544         Likewise.
5545         * testsuite/25_algorithms/pstl/alg_nonmodifying/reverse.cc:
5546         Likewise.
5547         * testsuite/25_algorithms/pstl/alg_nonmodifying/reverse_copy.cc:
5548         Likewise.
5549         * testsuite/25_algorithms/pstl/alg_nonmodifying/search_n.cc:
5550         Likewise.
5551         * testsuite/25_algorithms/pstl/alg_sorting/includes.cc:
5552         Likewise.
5553         * testsuite/25_algorithms/pstl/alg_sorting/is_heap.cc: Likewise.
5554         * testsuite/25_algorithms/pstl/alg_sorting/is_sorted.cc:
5555         Likewise.
5556         * testsuite/25_algorithms/pstl/alg_sorting/lexicographical_compare.cc:
5557         Likewise.
5558         * testsuite/25_algorithms/pstl/alg_sorting/minmax_element.cc:
5559         Likewise.
5560         * testsuite/25_algorithms/pstl/alg_sorting/partial_sort.cc:
5561         Likewise.
5562         * testsuite/25_algorithms/pstl/alg_sorting/partial_sort_copy.cc:
5563         Likewise.
5564         * testsuite/25_algorithms/pstl/alg_sorting/set.cc: Likewise.
5565         * testsuite/25_algorithms/pstl/alg_sorting/sort.cc: Likewise.
5566         * testsuite/25_algorithms/pstl/feature_test-2.cc: Likewise.
5567         * testsuite/25_algorithms/pstl/feature_test-3.cc: Likewise.
5568         * testsuite/25_algorithms/pstl/feature_test-4.cc: Likewise.
5569         * testsuite/25_algorithms/pstl/feature_test-5.cc: Likewise.
5570         * testsuite/25_algorithms/pstl/feature_test.cc: Likewise.
5571         * testsuite/26_numerics/pstl/numeric_ops/adjacent_difference.cc:
5572         Likewise.
5573         * testsuite/26_numerics/pstl/numeric_ops/reduce.cc: Likewise.
5574         * testsuite/26_numerics/pstl/numeric_ops/scan.cc: Likewise.
5575         * testsuite/26_numerics/pstl/numeric_ops/transform_reduce.cc:
5576         Likewise.
5577         * testsuite/26_numerics/pstl/numeric_ops/transform_scan.cc:
5578         Likewise.
5579
5580 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
5581
5582         * testsuite/20_util/scoped_allocator/69293_neg.cc: Add dg-error
5583         for additional errors in C++20.
5584         * testsuite/20_util/specialized_algorithms/memory_management_tools/destroy_neg.cc:
5585         Likewise.
5586         * testsuite/20_util/uses_allocator/69293_neg.cc: Likewise.
5587         * testsuite/27_io/filesystem/path/io/dr2989.cc: Likewise.
5588
5589 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
5590
5591         * testsuite/20_util/variant/compile.cc: Rename 'any' to avoid
5592         clash with std::any.
5593
5594 2021-05-07  Jonathan Wakely  <jwakely@redhat.com>
5595
5596         * include/std/istream (__rvalue_stream_extraction_t): Replace
5597         use of __rval_streamable.
5598         * include/std/ostream (__rvalue_stream_insertion_t): Likewise.
5599         (__rval_streamable): Remove.
5600         (_Require_derived_from_ios_base, __derived_from_ios_base): New
5601         helper for checking constraints.
5602         * testsuite/27_io/basic_istream/extractors_other/char/4.cc: Fix
5603         reference to the wrong subclause of the standard.
5604         * testsuite/27_io/basic_istream/extractors_other/wchar_t/4.cc:
5605         Likewise.
5606         * testsuite/27_io/basic_ostream/inserters_other/char/6.cc:
5607         Likewise.
5608         * testsuite/27_io/basic_ostream/inserters_other/wchar_t/6.cc:
5609         Likewise.
5610         * testsuite/27_io/basic_ostream/inserters_other/char/99692.cc:
5611         New test.
5612         * testsuite/27_io/filesystem/path/io/dr2989.cc: Adjust pruned
5613         errors.
5614
5615 2021-05-06  Jonathan Wakely  <jwakely@redhat.com>
5616
5617         * include/bits/stl_algobase.h (__copy_move, __copy_move_backward):
5618         Improve static_assert messages.
5619         * testsuite/25_algorithms/copy/58982.cc: Adjust expected output.
5620         * testsuite/25_algorithms/copy_n/58982.cc: Likewise.
5621
5622 2021-05-06  Patrick Palka  <ppalka@redhat.com>
5623
5624         * include/std/ranges (filter_view::_Iterator::base): Make the
5625         const& overload unconstrained and return a const reference as
5626         per LWG 3533.  Make unconditionally noexcept.
5627         (transform_view::_Iterator::base): Likewise.
5628         (elements_view::_Iterator::base): Likewise.
5629
5630 2021-05-06  Patrick Palka  <ppalka@redhat.com>
5631
5632         * include/bits/stl_iterator.h (move_iterator::base): Make the
5633         const& overload unconstrained and return a const reference as
5634         per LWG 3391.  Make unconditionally noexcept.
5635         (counted_iterator::base): Likewise.
5636         * testsuite/24_iterators/move_iterator/lwg3391.cc: New test.
5637         * testsuite/24_iterators/move_iterator/move_only.cc: Adjust
5638         has_member_base concept to decay-copy the result of base().
5639
5640 2021-05-06  Jonathan Wakely  <jwakely@redhat.com>
5641
5642         * include/std/type_traits (remove_cvref_t): Define in terms of
5643         remove_cvref.
5644         * testsuite/20_util/remove_cvref/value.cc: Check alias.
5645
5646 2021-05-06  Jonathan Wakely  <jwakely@redhat.com>
5647
5648         Revert:
5649         2021-05-05  Jonathan Wakely  <jwakely@redhat.com>
5650
5651         * include/std/charconv (__from_chars_alnum): Pass unsigned
5652         char to std::isdigit.
5653
5654 2021-05-05  Patrick Palka  <ppalka@redhat.com>
5655
5656         * include/bits/ranges_util.h (enable_borrowed_range<subrange>):
5657         Remove constraints on this partial specialization.
5658         * include/std/ranges (enable_borrowed_range<iota_view>):
5659         Likewise.
5660
5661 2021-05-05  Patrick Palka  <ppalka@redhat.com>
5662
5663         * include/std/ranges (transform_view::_Iterator::iter_swap):
5664         Remove as per LWG 3520.
5665         (join_view::_Iterator::iter_swap): Add indirectly_swappable
5666         constraint as per LWG 3517.
5667
5668 2021-05-05  Jonathan Wakely  <jwakely@redhat.com>
5669
5670         * testsuite/20_util/function_objects/invoke/3.cc: Check feature
5671         test macro.
5672         * testsuite/20_util/function_objects/invoke/version.cc: New test.
5673
5674 2021-05-05  Jonathan Wakely  <jwakely@redhat.com>
5675
5676         * include/std/charconv (__from_chars_alnum): Pass unsigned
5677         char to std::isdigit.
5678
5679 2021-05-05  Corentin Gay  <gay@adacore.com>
5680
5681         * acinclude.m4: Add VxWorks-specific case for the
5682         configuration of ctypes.
5683         * configure: Regenerate.
5684         * config/locale/vxworks/ctype_members.cc: Add VxWorks-specific
5685         version.
5686         * config/os/vxworks/ctype_base.h: Adjust for VxWorks7+.
5687         * config/os/vxworks/ctype_configure_char.cc: Likewise.
5688         * config/os/vxworks/ctype_inline.h: Likewise.
5689         * testsuite/28_regex/traits/char/isctype.cc: Defines
5690         NEWLINE_IN_CLASS_BLANK if the target is VxWorks.
5691         * testsuite/28_regex/traits/wchar_t/isctype.cc: Likewise.
5692
5693 2021-05-04  Jonathan Wakely  <jwakely@redhat.com>
5694
5695         * include/std/future (promise::set_value): Check for existence
5696         of shared state before dereferncing it.
5697         (promise::set_exception, promise::set_value_at_thread_exit)
5698         (promise::set_exception_at_thread_exit): Likewise.
5699         (promise<R&>::set_value, promise<R&>::set_exception)
5700         (promise<R&>::set_value_at_thread_exit)
5701         (promise<R&>::set_exception_at_thread_exit): Likewise.
5702         (promise<void>::set_value, promise<void>::set_exception)
5703         (promise<void>::set_value_at_thread_exit)
5704         (promise<void>::set_exception_at_thread_exit): Likewise.
5705         * testsuite/30_threads/promise/members/at_thread_exit2.cc:
5706         Remove unused variable.
5707
5708 2021-05-04  Jonathan Wakely  <jwakely@redhat.com>
5709
5710         * include/bits/basic_string.h (basic_string(const CharT*, const A&)):
5711         Do not do arithmetic on null pointer.
5712
5713 2021-05-04  Jonathan Wakely  <jwakely@redhat.com>
5714
5715         * include/ext/pb_ds/detail/cc_hash_table_map_/cc_ht_map_.hpp
5716         (find_key_pointer(key_const_reference, false_type))
5717         (find_key_pointer(key_const_reference, true_type)): Do not
5718         dereference null pointer.
5719
5720 2021-05-04  Jonathan Wakely  <jwakely@redhat.com>
5721
5722         * testsuite/20_util/from_chars/3.cc: Use unsigned type to avoid
5723         overflow.
5724         * testsuite/24_iterators/reverse_iterator/2.cc: Do not add
5725         non-zero value to null pointer.
5726         * testsuite/25_algorithms/copy_backward/move_iterators/69478.cc:
5727         Use past-the-end iterator for result.
5728         * testsuite/25_algorithms/move_backward/69478.cc: Likewise.
5729         * testsuite/25_algorithms/move_backward/93872.cc: Likewise.
5730
5731 2021-05-04  Jonathan Wakely  <jwakely@redhat.com>
5732
5733         PR libstdc++/100384
5734         * include/std/variant (__get_t): New alias template yielding the
5735         return type of std::get<N> on a variant.
5736         (__visit_result_t): New alias template yielding the result of
5737         std::visit.
5738         (__same_types): Move into namespace __detail::__variant.
5739         (__check_visitor_results): Likewise. Use __invoke_result_t and
5740         __get_t.
5741         (__check_visitor_result): Remove.
5742         (visit): Use __visit_result_t for return type.
5743         * testsuite/20_util/variant/100384.cc: New test.
5744
5745 2021-05-04  Jonathan Wakely  <jwakely@redhat.com>
5746
5747         * acinclude.m4 (GLIBCXX_ENABLE_INT128_FLOAT128): Remove
5748         checks for __int128 and rename to GLIBCXX_ENABLE_FLOAT128.
5749         * config.h.in: Regenerate.
5750         * configure: Regenerate.
5751         * configure.ac: Adjust to use GLIBCXX_ENABLE_FLOAT128.
5752         * include/bits/random.h (_Select_uint_least_t<s, 1>):
5753         Use __SIZEOF_INT128__ to decide whether to use __int128.
5754         * include/std/charconv (__to_chars_unsigned_type): Likewise.
5755
5756 2021-05-03  Gerald Pfeifer  <gerald@pfeifer.com>
5757
5758         * doc/xml/manual/ctype.xml: Move unix.org reference to https.
5759         * doc/html/manual/facets.html: Regenerate.
5760
5761 2021-04-30  Patrick Palka  <ppalka@redhat.com>
5762
5763         * include/std/ranges (__detail::__non_propating_cache): Define
5764         as per P2328.
5765         (join_view): Remove constraints on the value and reference types
5766         of the wrapped iterator type as per P2328.
5767         (join_view::_Iterator::_M_satisfy): Adjust as per P2328.
5768         (join_view::_Iterator::operator++): Likewise.
5769         (join_view::_M_inner): Use __non_propating_cache as per P2328.
5770         Remove now-redundant use of __maybe_present_t.
5771         * testsuite/std/ranges/adaptors/join.cc: Include <array>.
5772         (test10): New test.
5773
5774 2021-04-30  Jonathan Wakely  <jwakely@redhat.com>
5775
5776         * include/bits/basic_string.h (__cpp_lib_constexpr_string):
5777         Only define for C++17 and later.
5778         * include/std/version (__cpp_lib_semaphore): Fix condition
5779         to match the one in <semaphore>.
5780
5781 2021-04-30  Jonathan Wakely  <jwakely@redhat.com>
5782
5783         * acinclude.m4 (GLIBCXX_CHECK_INT64_T): Delete.
5784         * config.h.in: Regenerate.
5785         * configure: Regenerate.
5786         * configure.ac: Do not use GLIBCXX_CHECK_INT64_T.
5787         * include/bits/postypes.h: Remove include of <stdint.h> and
5788         definition/undefinition of the __STDC_LIMIT_MACROS and
5789         __STDC_CONSTANT_MACROS macros.
5790         (streamoff): Use __INT64_TYPE__ if defined.
5791
5792 2021-04-30  Patrick Palka  <ppalka@redhat.com>
5793
5794         * include/std/ranges (split_view::_InnerIter::operator++):
5795         Depend on _Base instead of _Vp directly, as per LWG 3532.
5796
5797 2021-04-30  Patrick Palka  <ppalka@redhat.com>
5798
5799         * include/bits/ranges_util.h (subrange::subrange): Avoid
5800         list-initialization in delegating constructor.
5801         * include/std/ranges (single_view): Replace implicit guide
5802         with explicit deduction guide that decays its argument.
5803         (_Single::operator()): Avoid CTAD when constructing the
5804         single_view object.
5805         (_Iota::operator()): Avoid list-initialization.
5806         (__detail::__can_filter_view, _Filter::operator()): Likewise.
5807         (__detail::__can_transform_view, _Transform::operator()): Likewise.
5808         (take_view::begin): Likewise.
5809         (__detail::__can_take_view, _Take::operator()): Likewise.
5810         (__detail::__can_take_while_view, _TakeWhile::operator()): Likewise.
5811         (__detail::__can_drop_view, _Drop::operator()): Likewise.
5812         (__detail::__can_drop_while_view, _DropWhile::operator()): Likewise.
5813         (split_view::split_view): Use views::single when initializing
5814         _M_pattern.
5815         (__detail::__can_split_view, _Split::operator()): Avoid
5816         list-initialization.
5817         (_Counted::operator()): Likewise.
5818         * testsuite/std/ranges/p2367.cc: New test.
5819
5820 2021-04-30  Jonathan Wakely  <jwakely@redhat.com>
5821
5822         PR libstdc++/60497
5823         * include/bits/basic_ios.tcc (basic_ios::copyfmt): use
5824         std::addressof.
5825         * include/bits/basic_string.tcc (basic_string::swap)
5826         (basic_string::assign): Likewise.
5827         * include/bits/deque.tcc (deque::operator=(const deque&)):
5828         Likewise.
5829         * include/bits/stl_tree.h (_Rb_tree::operator=(const * _Rb_tree&)):
5830         Likewise.
5831         * include/bits/vector.tcc (vector::operator=(const vector&)):
5832         Likewise.
5833
5834 2021-04-30  Jonathan Wakely  <jwakely@redhat.com>
5835
5836         * include/std/istream (operator>>(Istream&&, x&)): Simplify, as
5837         per LWG 1203.
5838         * include/std/ostream (operator<<(Ostream&&, const x&)):
5839         Likewise.
5840         * testsuite/27_io/basic_istream/extractors_character/char/lwg2499_neg.cc:
5841         Adjust dg-error pattern.
5842         * testsuite/27_io/basic_istream/extractors_character/wchar_t/lwg2499_neg.cc:
5843         Likewise.
5844         * testsuite/27_io/basic_istream/extractors_other/char/4.cc: Define
5845         is_extractable trait to replace std::__is_extractable. Make it
5846         work with rvalue streams as well as lvalues, to replace f() and
5847         g() helper functions.
5848         * testsuite/27_io/basic_istream/extractors_other/wchar_t/4.cc:
5849         Likewise.
5850         * testsuite/27_io/basic_ostream/inserters_other/char/6.cc:
5851         Define is_insertable trait to replace std::__is_insertable. Make
5852         it work with rvalue streams as well as lvalues, to replace f()
5853         and g() helper functions.
5854         * testsuite/27_io/basic_ostream/inserters_other/wchar_t/6.cc:
5855         Likewise.
5856         * testsuite/27_io/filesystem/path/io/dr2989.cc: Prune additional
5857         errors from new constraints.
5858         * testsuite/27_io/rvalue_streams-2.cc: Remove PR 80675 checks,
5859         which are no longer expected to compile.
5860         * testsuite/27_io/rvalue_streams.cc: Adjust existing test.
5861         Verify LWG 1203 changes.
5862
5863 2021-04-30  Jonathan Wakely  <jwakely@redhat.com>
5864
5865         PR libstdc++/100285
5866         * include/experimental/socket (__basic_socket_impl::set_option)
5867         (__basic_socket_impl::get_option) [!_GLIBCXX_HAVE_SYS_SOCKET_H]:
5868         Just set error code.
5869         * testsuite/experimental/net/socket/socket_base.cc: CHeck
5870         for <sys/socket.h> not <socket.h>.
5871
5872 2021-04-30  Jonathan Wakely  <jwakely@redhat.com>
5873
5874         PR libstdc++/100180
5875         PR libstdc++/100286
5876         PR libstdc++/100351
5877         * testsuite/experimental/net/internet/address/v4/comparisons.cc:
5878         Use new effective-target keyword.
5879         * testsuite/experimental/net/internet/address/v4/cons.cc:
5880         Likewise.
5881         * testsuite/experimental/net/internet/address/v4/creation.cc:
5882         Likewise.
5883         * testsuite/experimental/net/internet/address/v4/members.cc:
5884         Likewise.
5885         * testsuite/experimental/net/internet/address/v6/members.cc:
5886         Likewise.
5887         * testsuite/experimental/net/internet/resolver/base.cc:
5888         Likewise.
5889         * testsuite/experimental/net/internet/resolver/ops/lookup.cc:
5890         Likewise.
5891         * testsuite/experimental/net/internet/resolver/ops/reverse.cc:
5892         Likewise.
5893         * testsuite/experimental/net/internet/socket/opt.cc:
5894         Likewise.
5895         * testsuite/experimental/net/internet/tcp.cc:
5896         Likewise.
5897         * testsuite/experimental/net/internet/udp.cc:
5898         Likewise.
5899         * testsuite/lib/libstdc++.exp (check_effective_target_net_ts_ip):
5900         New proc to check net_ts_ip et.
5901
5902 2021-04-28  Jonathan Wakely  <jwakely@redhat.com>
5903
5904         PR libstdc++/97930
5905         * testsuite/20_util/pair/requirements/structural.cc: New test.
5906
5907 2021-04-28  Jonathan Wakely  <jwakely@redhat.com>
5908
5909         * include/bits/stl_pair.h (pair) [__cplusplus > 202002]: Add
5910         new definitions for constructors and assignment operators using
5911         concepts for constraints.
5912         * testsuite/20_util/pair/cons/99957.cc: Disable for C++20 and
5913         later.
5914         * testsuite/20_util/pair/cons/explicit_construct.cc: Adjust
5915         expected error messages to also match C++20 errors.
5916
5917 2021-04-28  Jonathan Wakely  <jwakely@redhat.com>
5918
5919         PR libstdc++/99957
5920         * include/bits/stl_pair.h (_PCC::_MoveCopyPair, _PCC::_CopyMovePair):
5921         Combine and replace with ...
5922         (_PCC::_DeprConsPair): New SFINAE helper function.
5923         (pair): Merge preprocessor blocks so that all C++03 members
5924         are defined together at the end.
5925         (pair::pair(const _T1&, _U2&&), pair::pair(_U1&&, const _T2&)):
5926         Replace _T1 and _T2 parameters with __null_ptr_constant and
5927         adjust constraints.
5928         * testsuite/20_util/pair/40925.cc: Use nullptr instead of 0.
5929         * testsuite/20_util/pair/cons/explicit_construct.cc: Likewise.
5930         * testsuite/20_util/pair/cons/99957.cc: New test.
5931
5932 2021-04-28  Jonathan Wakely  <jwakely@redhat.com>
5933
5934         * include/bits/basic_string.h (__cpp_lib_constexpr_string): Define.
5935         * include/std/version (__cpp_lib_constexpr_string): Define.
5936         * testsuite/21_strings/char_traits/requirements/constexpr_functions_c++17.cc:
5937         Check for __cpp_lib_constexpr_string.
5938         * testsuite/21_strings/char_traits/requirements/constexpr_functions_c++20.cc:
5939         Likewise.
5940         * testsuite/21_strings/char_traits/requirements/version.cc: New test.
5941
5942 2021-04-28  Jonathan Wakely  <jwakely@redhat.com>
5943
5944         * doc/Makefile.am (stamp-pdf-doxygen): Improve comment about
5945         dealing with errors. Use '@' to prevent shell command being
5946         echoed.
5947         * doc/Makefile.in: Regenerate.
5948
5949 2021-04-28  Jonathan Wakely  <jwakely@redhat.com>
5950
5951         PR libstdc++/100298
5952         * include/bits/std_thread.h (thread::hardware_concurrency): Add
5953         missing noexcept to inline definition for non-gthreads targets.
5954
5955 2021-04-28  Patrick Palka  <ppalka@redhat.com>
5956
5957         PR libstdc++/100187
5958         PR libstdc++/100237
5959         PR libstdc++/100249
5960         PR libstdc++/100287
5961         * include/bits/ranges_algo.h (__search_n_fn::operator()): Give
5962         the __value_comp lambda an explicit bool return type.
5963         (__is_permutation_fn::operator()): Give the __proj_scan local
5964         variable auto&& return type.  Give the __comp_scan lambda an
5965         explicit bool return type.
5966         (__remove_fn::operator()): Give the __pred lambda an explicit
5967         bool return type.
5968         (__partition_fn::operator()): Don't std::move __first twice
5969         when returning an empty subrange.
5970         (__min_fn::operator()): Don't std::move __comp.
5971         (__max_fn::operator()): Likewise.
5972         (__minmax_fn::operator()): Likewise.
5973
5974 2021-04-27  Patrick Palka  <ppalka@redhat.com>
5975
5976         PR libstdc++/100290
5977         * include/std/ranges (join_view::_Iterator::operator++): Correct
5978         the return type of the lambda to avoid returning a copy of
5979         _M_parent->_M_inner.
5980         * testsuite/std/ranges/adaptors/join.cc (test10): New test.
5981
5982 2021-04-27  Jakub Jelinek  <jakub@redhat.com>
5983
5984         Revert:
5985         2021-04-22  Jakub Jelinek  <jakub@redhat.com>
5986
5987         PR target/100182
5988         * testsuite/29_atomics/atomic_float/1.cc: Add dg-xfail-run-if for
5989         ia32.
5990         * testsuite/29_atomics/atomic_float/wait_notify.cc: Add dg-skip-if for
5991         ia32.
5992
5993 2021-04-27  Jonathan Wakely  <jwakely@redhat.com>
5994
5995         * include/experimental/internet (address_v6::bytes_type): Adjust
5996         formatting.
5997         (basic_endpoint): Define _M_is_v6() to put all checks for
5998         AF_INET6 in one place.
5999         (basic_endpoint::resize): Simplify.
6000         (operator==(const tcp&, const tcp&)): Add constexpr and noexcept.
6001         (operator!=(const tcp&, const tcp&)): Likewise.
6002         (operator==(const udp&, const udp&)): Likewise.
6003         (operator!=(const udp&, const udp&)): Likewise.
6004         * testsuite/experimental/net/internet/tcp.cc: New test.
6005         * testsuite/experimental/net/internet/udp.cc: New test.
6006
6007 2021-04-27  Jonathan Wakely  <jwakely@redhat.com>
6008
6009         PR libstdc++/100286
6010         * include/experimental/internet (resolver_errc, resolver_category())
6011         (make_error_code, make_error_condition): Define unconditionally,
6012         only make enumerators and use of gai_strerror depend on the
6013         availability of <netdb.h>.
6014         (address_v4::to_string): Use correct constant for string length.
6015         (address_v4::to_string, address_v6::to_string): Define
6016         unconditionally, throw if unsupported.
6017         (make_address_v4, make_address_v6): Define unconditionally.
6018         Return an error if unsupported.
6019         (tcp, udp, v6_only, unicast::hops, multicast::*): Define
6020         conditionally,
6021         * testsuite/experimental/net/internet/socket/opt.cc: Check for
6022         <netinet/in.h> and <netinet/tcp.h> before using types from
6023         namespace net::ip.
6024
6025 2021-04-27  Jonathan Wakely  <jwakely@redhat.com>
6026
6027         PR libstdc++/100285
6028         * include/experimental/internet (resolver_base::flags):
6029         Define overloaded operators as hidden friends.
6030         * include/experimental/socket (socket_base::message_flags):
6031         Likewise.
6032
6033 2021-04-26  Jonathan Wakely  <jwakely@redhat.com>
6034
6035         * include/experimental/internet (tcp::no_delay, v6_only)
6036         (unicast::hops, multicast::hops, multicast::enable_loopback):
6037         Change access of base class and static data members. Add
6038         using-declaration for __socket_crtp::operator=(_Tp).
6039         (multicast::__mcastopt): New type.
6040         (multicast::join_group, multicast::leave_group): Derive from
6041         __mcastopt for common implementation.
6042         * include/experimental/socket: Add comment.
6043         * testsuite/experimental/net/internet/socket/opt.cc: New test.
6044         * testsuite/experimental/net/socket/socket_base.cc: Check for
6045         protected constructor/destructor of socket_base. Check for
6046         explicit constructors of socket option classes.
6047
6048 2021-04-26  Jonathan Wakely  <jwakely@redhat.com>
6049
6050         * include/experimental/bits/net.h (__socket_base): Add
6051         bool template parameter to allow BooleanSocketOption and
6052         IntegerSocketOption to have different __socket_base<int>
6053         base classes.
6054         (__socket_base<bool>): Adjust base class.
6055         (__socket_base<int>): Add partial specialization.
6056         (__socket_crtp::operator=(_Tp)): Add noexcept-specifier.
6057         * include/experimental/socket (socket_base::broadcast)
6058         (socket_base::debug, socket_base::do_not_route)
6059         (socket_base::keep_alive, socket_base::linger)
6060         (socket_base::out_of_band_inline)
6061         (socket_base::receive_buffer_size)
6062         (socket_base::receive_low_watermark)
6063         (socket_base::reuse_address, socket_base::send_buffer_size)
6064         (socket_base::send_low_watermark): Add using-declaration for
6065         __socket_crtp::operator=(_Tp).
6066         * testsuite/experimental/net/socket/socket_base.cc: Check
6067         properties of socket option types.
6068
6069 2021-04-26  Jonathan Wakely  <jwakely@redhat.com>
6070
6071         * include/experimental/internet (resolver_base::flags): Remove
6072         enumerators. Initialize constants directly with desired values.
6073         Make all operators constexpr and noexcept.
6074         * testsuite/experimental/net/internet/resolver/base.cc: Use
6075         __gnu_test::test_bitmask_values for bitmask type. Check
6076         construction and destruction is protected.
6077
6078 2021-04-26  Jonathan Wakely  <jwakely@redhat.com>
6079
6080         * include/bits/semaphore_base.h: Include <exception> and <errno.h>.
6081
6082 2021-04-26  Jonathan Wakely  <jwakely@redhat.com>
6083
6084         PR libstdc++/100259
6085         * include/experimental/internet (net::ip::make_error_code)
6086         (net::ip::make_error_condition, net::ip::make_network_v4)
6087         (net::ip::operator==(const udp&, const udp&)): Add 'inline'.
6088
6089 2021-04-24  David Edelsohn  <dje.gcc@gmail.com>
6090
6091         * testsuite/lib/dg-options.exp (atomic_link_flags): New.
6092         (add_options_for_libatomic): Use atomic_link_flags.
6093
6094 2021-04-23  Jonathan Wakely  <jwakely@redhat.com>
6095
6096         PR libstdc++/100180
6097         * include/experimental/io_context (io_context): Define
6098         dummy_pollfd type so that most member functions still compile
6099         without <poll.h> and struct pollfd.
6100
6101 2021-04-23  Jonathan Wakely  <jwakely@redhat.com>
6102
6103         * include/experimental/io_context (io_context::async_wait): Add
6104         comment.
6105         * include/experimental/socket (basic_socket::async_connect):
6106         Cast wait_type constant to int.
6107         (basic_datagram_socket::async_receive): Likewise.
6108         (basic_datagram_socket::async_receive_from): Likewise.
6109         (basic_datagram_socket::async_send): Likewise.
6110         (basic_datagram_socket::async_send_to): Likewise.
6111         (basic_stream_socket::async_receive): Likewise.
6112         (basic_stream_socket::async_send): Likewise. Use io_context
6113         parameter directly, instead of via an executor.
6114         (basic_socket_acceptor::async_accept): Likewise.
6115
6116 2021-04-23  Jonathan Wakely  <jwakely@redhat.com>
6117
6118         * include/experimental/socket (socket_base::shutdown_type):
6119         (socket_base::wait_type, socket_base::message_flags):
6120         Remove enumerators. Initialize constants directly with desired
6121         values.
6122         (socket_base::message_flags): Make all operators constexpr and
6123         noexcept.
6124         * testsuite/util/testsuite_common_types.h (test_bitmask_values):
6125         New test utility.
6126         * testsuite/experimental/net/socket/socket_base.cc: New test.
6127
6128 2021-04-22  David Edelsohn  <dje.gcc@gmail.com>
6129
6130         * config/os/aix/atomicity.h: Delete.
6131
6132 2021-04-22  Jonathan Wakely  <jwakely@redhat.com>
6133
6134         * include/bits/atomic_timed_wait.h (__cond_wait_until_impl):
6135         Handle system_clock as well as steady_clock.
6136         * testsuite/30_threads/semaphore/try_acquire_for.cc: Re-enable.
6137         * testsuite/30_threads/semaphore/try_acquire_until.cc:
6138         Re-enable.
6139
6140 2021-04-22  Jonathan Wakely  <jwakely@redhat.com>
6141
6142         * testsuite/30_threads/semaphore/try_acquire_posix.cc: Add
6143         options for libatomic.
6144
6145 2021-04-22  Jonathan Wakely  <jwakely@redhat.com>
6146
6147         * config/os/gnu-linux/os_defines.h: Fix type in comment.
6148
6149 2021-04-22  Jonathan Wakely  <jwakely@redhat.com>
6150
6151         PR libstdc++/99006
6152         * include/bits/shared_ptr.h (allocate_shared): Assert that _Tp
6153         is not an array type.
6154         * include/bits/shared_ptr_base.h (__allocate_shared): Likewise.
6155         * testsuite/20_util/shared_ptr/creation/99006.cc: New test.
6156
6157 2021-04-22  Thomas Rodgers  <rodgert@twrodgers.com>
6158
6159         * include/bits/atomic_wait.h: Always notify waiters in the
6160         case of 'bare' address notification.
6161
6162 2021-04-22  Jakub Jelinek  <jakub@redhat.com>
6163
6164         PR target/100182
6165         * testsuite/29_atomics/atomic_float/1.cc: Add dg-xfail-run-if for
6166         ia32.
6167         * testsuite/29_atomics/atomic_float/wait_notify.cc: Add dg-skip-if for
6168         ia32.
6169
6170 2021-04-22  Jonathan Wakely  <jwakely@redhat.com>
6171
6172         PR libstdc++/100179
6173         * include/bits/semaphore_base.h: Remove #error.
6174         * include/std/semaphore: Do not define anything unless one of
6175         the implementations is available.
6176
6177 2021-04-21  Thomas Rodgers  <rodgert@twrodgers.com>
6178
6179         * include/bits/semaphore_base.h: Always reload __old in
6180         __atomic_semaphore::_S_do_try_acquire().
6181         * testsuite/30_threads/stop_token/stop_callback/destroy.cc:
6182         re-enable testcase.
6183
6184 2021-04-21  Philippe Blain  <levraiphilippeblain@gmail.com>
6185             Jonathan Wakely  <jwakely@redhat.com>
6186
6187         PR libstdc++/99453
6188         * python/Makefile.am: Install libstdc++*-gdb.py more robustly.
6189         * python/Makefile.in: Regenerate.
6190
6191 2021-04-21  Thomas Rodgers  <rodgert@twrodgers.com>
6192
6193         * include/bits/semaphore_base.h: Add missing _M_try_acquire()
6194         member to __platform_wait.
6195
6196 2021-04-21  Jonathan Wakely  <jwakely@redhat.com>
6197
6198         * include/std/latch: Replace tab characters in license text.
6199         * include/std/semaphore: Likewise.
6200
6201 2021-04-21  Jakub Jelinek  <jakub@redhat.com>
6202
6203         PR libstdc++/100164
6204         * acinclude.m4: For POSIX semaphores AC_DEFINE HAVE_POSIX_SEMAPHORE
6205         rather than _GLIBCXX_HAVE_POSIX_SEMAPHORE.
6206         * configure: Regenerated.
6207         * config.h.in: Regenerated.
6208
6209 2021-04-20  Jonathan Wakely  <jwakely@redhat.com>
6210
6211         * testsuite/30_threads/semaphore/try_acquire_for.cc: Disable
6212         test for targets not using futexes for semaphores.
6213         * testsuite/30_threads/semaphore/try_acquire_until.cc: Likewise.
6214         * testsuite/30_threads/stop_token/stop_callback/destroy.cc:
6215         Disable for all targets.
6216
6217 2021-04-20  Thomas Rodgers  <trodgers@redhat.com>
6218
6219         * include/Makefile.am: Add new <bits/this_thread_sleep.h> header.
6220         * include/Makefile.in: Regenerate.
6221         * include/bits/this_thread_sleep.h: New file.
6222         * include/bits/atomic_base.h: Adjust all calls
6223         to __atomic_wait/__atomic_notify for new call signatures.
6224         * include/bits/atomic_timed_wait.h: Extensive rewrite.
6225         * include/bits/atomic_wait.h: Likewise.
6226         * include/bits/semaphore_base.h: Adjust all calls
6227         to __atomic_wait/__atomic_notify for new call signatures.
6228         * include/std/atomic: Likewise.
6229         * include/std/barrier: Likewise.
6230         * include/std/latch: Likewise.
6231         * include/std/semaphore: Likewise.
6232         * include/std/thread (this_thread::sleep_for)
6233         (this_thread::sleep_until): Move to new header.
6234         * testsuite/29_atomics/atomic/wait_notify/bool.cc: Simplify
6235         test.
6236         * testsuite/29_atomics/atomic/wait_notify/generic.cc: Likewise.
6237         * testsuite/29_atomics/atomic/wait_notify/pointers.cc: Likewise.
6238         * testsuite/29_atomics/atomic_flag/wait_notify/1.cc: Likewise.
6239         * testsuite/29_atomics/atomic_float/wait_notify.cc: Likewise.
6240         * testsuite/29_atomics/atomic_integral/wait_notify.cc: Likewise.
6241         * testsuite/29_atomics/atomic_ref/wait_notify.cc: Likewise.
6242
6243 2021-04-20  Patrick Palka  <ppalka@redhat.com>
6244
6245         PR libstdc++/95983
6246         * include/bits/stl_iterator.h (__detail::__move_iter_cat):
6247         Define.
6248         (move_iterator): Derive from the above in C++20 in order to
6249         conditionally define iterator_category as per P2259.
6250         (move_iterator::__base_cat): No longer used, so remove.
6251         (move_iterator::iterator_category): Remove in C++20.
6252         (__detail::__common_iter_use_postfix_proxy): Define.
6253         (common_iterator::_Proxy): Rename to ...
6254         (common_iterator:__arrow_proxy): ... this.
6255         (common_iterator::__postfix_proxy): Define as per P2259.
6256         (common_iterator::operator->): Adjust.
6257         (common_iterator::operator++): Adjust as per P2259.
6258         (iterator_traits<common_iterator>::_S_iter_cat): Define.
6259         (iterator_traits<common_iterator>::iterator_category): Change as
6260         per P2259.
6261         (__detail::__counted_iter_value_type): Define.
6262         (__detail::__counted_iter_concept): Define.
6263         (__detail::__counted_iter_cat): Define.
6264         (counted_iterator): Derive from the above three classes in order
6265         to conditionally define value_type, iterator_concept and
6266         iterator category respectively as per P2259.
6267         (counted_iterator::operator->): Define as per P2259.
6268         (incrementable_traits<counted_iterator>): Remove as per P2259.
6269         (iterator_traits<counted_iterator>): Adjust as per P2259.
6270         * include/std/ranges (__detail::__iota_view_iter_cat): Define.
6271         (iota_view::_Iterator): Derive from the above in order to
6272         conditionally define iterator_category as per P2259.
6273         (iota_view::_S_iter_cat): Rename to ...
6274         (iota_view::_S_iter_concept): ... this.
6275         (iota_view::iterator_concept): Use it to apply LWG 3291 changes.
6276         (iota_view::iterator_category): Remove.
6277         (__detail::__filter_view_iter_cat): Define.
6278         (filter_view::_Iterator): Derive from the above in order to
6279         conditionally define iterator_category as per P2259.
6280         (filter_view::_Iterator): Move to struct __filter_view_iter_cat.
6281         (filter_view::_Iterator::iterator_category): Remove.
6282         (transform_view::_Base): Define.
6283         (transform_view::__iter_cat): Define.
6284         (transform_view::_Iterator): Derive from the above in order to
6285         conditionally define iterator_category as per P2259.
6286         (transform_view::_Iterator::_Base): Just alias
6287         transform_view::_Base.
6288         (transform_view::_Iterator::_S_iter_cat): Move to struct
6289         transform_view::__iter_cat.
6290         (transform_view::_Iterator::iterator_category): Remove.
6291         (transform_view::_Sentinel::_Base): Just alias
6292         transform_view::_Base.
6293         (join_view::_Base): Define.
6294         (join_view::_Outer_iter): Define.
6295         (join_view::_Inner_iter): Define.
6296         (join_view::_S_ref_is_glvalue): Define.
6297         (join_view::__iter_cat): Define.
6298         (join_view::_Iterator): Derive from it in order to conditionally
6299         define iterator_category as per P2259.
6300         (join_view::_Iterator::_Base): Just alias join_view::_Base.
6301         (join_view::_Iterator::_S_ref_is_glvalue): Just alias
6302         join_view::_S_ref_is_glvalue.
6303         (join_view::_Iterator::_S_iter_cat): Move to struct
6304         transform_view::__iter_cat.
6305         (join_view::_Iterator::_Outer_iter): Just alias
6306         join_view::_Outer_iter.
6307         (join_view::_Iterator::_Inner_iter): Just alias
6308         join_view::_Inner_iter.
6309         (join_view::_Iterator::iterator_category): Remove.
6310         (join_view::_Sentinel::_Base): Just alias join_view::_Base.
6311         (__detail::__split_view_outer_iter_cat): Define.
6312         (__detail::__split_view_inner_iter_cat): Define.
6313         (split_view::_Base): Define.
6314         (split_view::_Outer_iter): Derive from __split_view_outer_iter_cat
6315         in order to conditionally define iterator_category as per P2259.
6316         (split_view::_Outer_iter::iterator_category): Remove.
6317         (split_view::_Inner_iter): Derive from __split_view_inner_iter_cat
6318         in order to conditionally define iterator_category as per P2259.
6319         (split_view::_Inner_iter::_S_iter_cat): Move to
6320         __split_view_inner_iter_cat.
6321         (split_view::_Inner_iter::iterator_category): Remove.
6322         (elements_view::_Base): Define.
6323         (elements_view::__iter_cat): Define.
6324         (elements_view::_Iterator): Derive from the above in order to
6325         conditionall define iterator_category as per P2259.
6326         (elements_view::_Iterator::_Base): Just alias
6327         elements_view::_Base.
6328         (elements_view::_Iterator::_S_iter_concept)
6329         (elements_view::_Iterator::iterator_concept): Define as per
6330         P2259.
6331         (elements_view::_Iterator::iterator_category): Remove.
6332         (elements_view::_Sentinel::_Base): Just alias
6333         elements_view::_Base.
6334         * testsuite/24_iterators/headers/iterator/synopsis_c++20.cc:
6335         Adjust constraints on iterator_traits<counted_iterator>.
6336         * testsuite/std/ranges/p2259.cc: New test.
6337
6338 2021-04-20  Jonathan Wakely  <jwakely@redhat.com>
6339
6340         PR libstdc++/100146
6341         * include/std/charconv (__cpp_lib_to_chars): Define
6342         conditionally.
6343         * include/std/version (__cpp_lib_to_chars): Likewise..
6344         * testsuite/20_util/from_chars/4.cc: Only check feature test
6345         macro, not _GLIBCXX_HAVE_USELOCALE.
6346         * testsuite/20_util/from_chars/5.cc: Likewise.
6347         * testsuite/20_util/from_chars/6.cc: Likewise.
6348         * testsuite/20_util/to_chars/long_double.cc: Likewise.
6349
6350 2021-04-20  Jakub Jelinek  <jakub@redhat.com>
6351
6352         * testsuite/util/testsuite_abi.cc (compare_symbols): If any symbol
6353         versions with _IEEE128_ substring are found, set ieee_version_found
6354         to true.  Ignore missing symbols with _IEEE128_ in version name if
6355         !ieee_version_found.  Use i->first as version_name instead of
6356         i->second.version_name if the latter is empty.
6357         * config/abi/post/powerpc64-linux-gnu/baseline_symbols.txt: Update.
6358
6359 2021-04-19  H.J. Lu  <hjl.tools@gmail.com>
6360
6361         * config/abi/post/x86_64-linux-gnu/x32/baseline_symbols.txt:
6362         Updated.
6363
6364 2021-04-17  Jakub Jelinek  <jakub@redhat.com>
6365
6366         * config/abi/post/powerpc-linux-gnu/baseline_symbols.txt: Update.
6367         * config/abi/post/powerpc64-linux-gnu/32/baseline_symbols.txt: Update.
6368
6369 2021-04-17  Jakub Jelinek  <jakub@redhat.com>
6370
6371         * config/abi/post/x86_64-linux-gnu/baseline_symbols.txt: Update.
6372         * config/abi/post/x86_64-linux-gnu/32/baseline_symbols.txt: Update.
6373         * config/abi/post/i386-linux-gnu/baseline_symbols.txt: Update.
6374         * config/abi/post/i486-linux-gnu/baseline_symbols.txt: Update.
6375         * config/abi/post/s390x-linux-gnu/baseline_symbols.txt: Update.
6376         * config/abi/post/powerpc64-linux-gnu/baseline_symbols.txt: Update.
6377
6378 2021-04-15  Jonathan Wakely  <jwakely@redhat.com>
6379
6380         * testsuite/lib/dg-options.exp (add_options_for_libatomic): Also
6381         add libatomic options for 32-bit sparc*-*-linux-gnu.
6382
6383 2021-04-15  Jonathan Wakely  <jwakely@redhat.com>
6384
6385         PR libstdc++/96657
6386         * libsupc++/Makefile.am: Add atomicity.cc here.
6387         * src/c++98/Makefile.am: Remove it from here.
6388         * libsupc++/Makefile.in: Regenerate.
6389         * src/c++98/Makefile.in: Regenerate.
6390         * testsuite/18_support/exception_ptr/96657.cc: New test.
6391
6392 2021-04-13  Jonathan Wakely  <jwakely@redhat.com>
6393
6394         PR libstdc++/100060
6395         * include/std/bit: Only include <ext/numeric_traits.h> for
6396         hosted build, use <limits> otherwise.
6397
6398 2021-04-13  Jonathan Wakely  <jwakely@redhat.com>
6399
6400         * doc/xml/manual/backwards_compatibility.xml: Remove porting
6401         notes for libg++ and libstdc++-v2, and bibliography.
6402         * doc/html/*: Regenerated.
6403
6404 2021-04-12  Jonathan Wakely  <jwakely@redhat.com>
6405
6406         PR libstdc++/100044
6407         * include/bits/ranges_util.h (__detail::__iterator_sentinel_pair):
6408         Remove helper concept.
6409         (subrange(_Pr), subrange(Pr, __make_unsigned_like<...>)): Remove
6410         deduction guides, as per LWG 3404.
6411         * testsuite/std/ranges/subrange/lwg3282_neg.cc: Check that class
6412         template argument deduction fails.
6413
6414 2021-04-12  Jonathan Wakely  <jwakely@redhat.com>
6415
6416         * testsuite/26_numerics/random/linear_congruential_engine/requirements/non_uint_neg.cc:
6417         Adjust expected error for C++20 mode.
6418         * testsuite/tr1/5_numerical_facilities/random/linear_congruential/requirements/non_uint_neg.cc:
6419         Likewise.
6420
6421 2021-04-12  Jonathan Wakely  <jwakely@redhat.com>
6422
6423         PR libstdc++/99995
6424         * testsuite/17_intro/headers/c++1998/49745.cc: Include all
6425         standard headers and XFAIL for effective-target c++20.
6426
6427 2021-04-09  François Dumont  <fdumont@gcc.gnu.org>
6428
6429         PR libstdc++/99402
6430         * include/debug/helper_functions.h (__can_advance(_InputIterator,
6431         const std::pair<_Diff, _Distance_precision>&, int)): New.
6432         (__can_advance(const _Safe_iterator<>&,
6433         const std::pair<_Diff, _Distance_precision>&, int)): New.
6434         * include/debug/macros.h (__glibcxx_check_can_increment_dist): New,
6435         use latter.
6436         (__glibcxx_check_can_increment_range): Adapt to use latter.
6437         (__glibcxx_check_can_decrement_range): Likewise.
6438         * include/debug/safe_iterator.h
6439         (_Safe_iterator<>::_M_can_advance(const std::pair<_Diff, _Distance_precision>&,
6440         int)): New.
6441         (__can_advance(const _Safe_iterator<>&,
6442         const std::pair<_Diff, _Distance_precision>&, int)): New.
6443         * include/debug/safe_iterator.tcc
6444         (_Safe_iterator<>::_M_can_advance(const std::pair<_Diff, _Distance_precision>&,
6445         int)): New.
6446         (_Safe_iterator<>::_M_valid_range(const _Safe_iterator<>&,
6447         std::pair<difference_type, _Distance_precision>&, bool)): Adapt for
6448         __dp_sign_max_size.
6449         (__copy_move_a): Adapt to use __glibcxx_check_can_increment_dist.
6450         (__copy_move_backward_a): Likewise.
6451         (__equal_aux): Likewise.
6452         * include/debug/stl_iterator.h (__can_advance(const std::reverse_iterator<>&,
6453         const std::pair<_Diff, _Distance_precision>&, int)): New.
6454         (__can_advance(const std::move_iterator<>&,
6455         const std::pair<_Diff, _Distance_precision>&, int)): New.
6456         * testsuite/25_algorithms/copy/debug/99402.cc: New test.
6457
6458 2021-04-09  Jonathan Wakely  <jwakely@redhat.com>
6459
6460         PR libstdc++/99985
6461         * include/bits/hashtable.h (_Hashtable::_S_nothrow_move()): Fix
6462         to be a valid constexpr function in C++11.
6463         * testsuite/23_containers/unordered_set/cons/99985.cc: New test.
6464
6465 2021-04-09  Jonathan Wakely  <jwakely@redhat.com>
6466
6467         * include/bits/fs_fwd.h: Fix doxygen group command.
6468         * include/bits/streambuf_iterator.h: Likewise.
6469         * include/bits/uses_allocator_args.h: Likewise.
6470         * include/std/memory: Likewise.
6471         * include/tr1/complex: Likewise.
6472
6473 2021-04-08  Jonathan Wakely  <jwakely@redhat.com>
6474
6475         * include/bits/basic_string.h: Tweak doxygen comment.
6476
6477 2021-04-08  Patrick Palka  <ppalka@redhat.com>
6478
6479         * include/std/ranges (__detail::find): Define.
6480         (split_view::_OuterIter::operator++): Apply proposed resolution
6481         of LWG 3505.
6482         * testsuite/std/ranges/adaptors/split.cc (test10): New test.
6483
6484 2021-04-08  Patrick Palka  <ppalka@redhat.com>
6485
6486         * include/std/ranges (__detail::find_if): Simplify.
6487         (__detail::find_if_not): Likewise.
6488         (__detail::min): Remove.
6489         (__detail::mismatch): Simplify.
6490         (take_view::size): Use std::min instead of __detail::min.
6491
6492 2021-04-08  Patrick Palka  <ppalka@redhat.com>
6493
6494         * include/std/ranges (__detail::__returnable_element): New
6495         concept.
6496         (elements_view): Use this concept in its constraints.  Add
6497         missing private access specifier.
6498         (elements_view::_S_get_element): Define as per LWG 3502.
6499         (elements_view::operator*, elements_view::operator[]): Use
6500         _S_get_element.
6501         (elements_view::operator++): Remove unnecessary constraint
6502         as per LWG 3492.
6503         * testsuite/std/ranges/adaptors/elements.cc (test05): New test.
6504
6505 2021-04-08  Jonathan Wakely  <jwakely@redhat.com>
6506
6507         * doc/Makefile.am (stamp-pdf-doxygen): Also grep for
6508         out-of-memory error in log file.
6509         * doc/Makefile.in: Regenerate.
6510
6511 2021-04-08  Jonathan Wakely  <jwakely@redhat.com>
6512
6513         * configure: Regenerate.
6514
6515 2021-04-08  Jonathan Wakely  <jwakely@redhat.com>
6516
6517         * include/bits/random.h: Fix doxygen group commands.
6518         * include/bits/regex_constants.h: Likewise.
6519         * include/tr1/random.h: Likewise.
6520
6521 2021-04-08  Jonathan Wakely  <jwakely@redhat.com>
6522
6523         * include/bits/hashtable.h (_Hashtable::_S_nothrow_move()):
6524         New function to determine noexcept-specifier for move
6525         constructors.
6526         (_Hashtable): Use _S_nothrow_move() on move constructors.
6527         * testsuite/23_containers/unordered_map/cons/noexcept_move_construct.cc:
6528         Correct static assertion message.
6529         * testsuite/23_containers/unordered_multimap/cons/noexcept_move_construct.cc:
6530         Likewise.
6531         * testsuite/23_containers/unordered_multiset/cons/noexcept_move_construct.cc:
6532         Likewise.
6533         * testsuite/23_containers/unordered_set/cons/noexcept_move_construct.cc:
6534         Likewise.
6535
6536 2021-04-08  Patrick Palka  <ppalka@redhat.com>
6537
6538         PR libstdc++/98384
6539         * testsuite/20_util/to_chars/long_double.cc: Don't run the test
6540         on targets without a large long double.  XFAIL the execution on
6541         targets with a non-conforming printf.
6542
6543 2021-04-08  Patrick Palka  <ppalka@redhat.com>
6544
6545         PR libstdc++/99433
6546         * include/std/ranges (__adaptor::__maybe_refwrap): Remove.
6547         (__adaptor::__adaptor_invocable): New concept.
6548         (__adaptor::__adaptor_partial_app_viable): New concept.
6549         (__adaptor::_RangeAdaptorClosure): Rewrite, turning it into a
6550         non-template base class.
6551         (__adaptor::_RangeAdaptor): Rewrite, turning it into a CRTP base
6552         class template.
6553         (__adaptor::_Partial): New class template that represents
6554         partial application of a range adaptor non-closure.
6555         (__adaptor::__pipe_invocable): New concept.
6556         (__adaptor::_Pipe): New class template.
6557         (__detail::__can_ref_view): New concept.
6558         (__detail::__can_subrange): New concept.
6559         (all): Replace the lambda here with ...
6560         (_All): ... this functor.  Add appropriate constraints.
6561         (__detail::__can_filter_view): New concept.
6562         (filter, _Filter): As in all/_All.
6563         (__detail::__can_transform): New concept.
6564         (transform, _Transform): As in all/_All.
6565         (__detail::__can_take_view): New concept.
6566         (take, _Take): As in all/_All.
6567         (__detail::__can_take_while_view): New concept.
6568         (take_while, _TakeWhile): As in all/_All.
6569         (__detail::__can_drop_view): New concept.
6570         (drop, _Drop): As in all/_All.
6571         (__detail::__can_drop_while_view): New concept.
6572         (drop_while, _DropWhile): As in all/_All.
6573         (__detail::__can_join_view): New concept.
6574         (join, _Join): As in all/_All.
6575         (__detail::__can_split_view): New concept.
6576         (split, _Split): As in all/_All.  Rename template parameter
6577         _Fp to _Pattern.
6578         (__detail::__already_common): New concept.
6579         (__detail::__can_common_view): New concept.
6580         (common, _Common): As in all/_All.
6581         (__detail::__can_reverse_view): New concept.
6582         (reverse, _Reverse): As in all/_All.
6583         (__detail::__can_elements_view): New concept.
6584         (elements, _Elements): As in all/_All.
6585         (keys, values): Adjust.
6586         * testsuite/std/ranges/adaptors/99433.cc: New test.
6587         * testsuite/std/ranges/adaptors/all.cc: No longer expect that
6588         adding empty range adaptor closure objects to a pipeline doesn't
6589         increase the size of the pipeline.
6590         (test05): New test.
6591         * testsuite/std/ranges/adaptors/common.cc (test03): New test.
6592         * testsuite/std/ranges/adaptors/drop.cc (test09): New test.
6593         * testsuite/std/ranges/adaptors/drop_while.cc (test04): New test.
6594         * testsuite/std/ranges/adaptors/elements.cc (test04): New test.
6595         * testsuite/std/ranges/adaptors/filter.cc (test06): New test.
6596         * testsuite/std/ranges/adaptors/join.cc (test09): New test.
6597         * testsuite/std/ranges/adaptors/p2281.cc: New test.
6598         * testsuite/std/ranges/adaptors/reverse.cc (test07): New test.
6599         * testsuite/std/ranges/adaptors/split.cc (test01, test04):
6600         Adjust.
6601         (test09): New test.
6602         * testsuite/std/ranges/adaptors/split_neg.cc (test01): Adjust
6603         expected error message.
6604         (test02): Likewise.  Extend test.
6605         * testsuite/std/ranges/adaptors/take.cc (test06): New test.
6606         * testsuite/std/ranges/adaptors/take_while.cc (test05): New test.
6607         * testsuite/std/ranges/adaptors/transform.cc (test07, test08):
6608         New test.
6609
6610 2021-04-08  Jonathan Wakely  <jwakely@redhat.com>
6611
6612         * include/std/string_view: Adjust Doxygen @file comment.
6613
6614 2021-04-08  Jonathan Wakely  <jwakely@redhat.com>
6615
6616         * include/std/type_traits (is_scoped_enum<T>): Constrain partial
6617         specialization to not match incomplete enum types. Use a
6618         requires-expression instead of instantiating is_convertible.
6619         (is_scoped_enum<const T>): Add as workaround for PR c++/99968.
6620         * testsuite/20_util/is_scoped_enum/value.cc: Check with
6621         incomplete types and opaque-enum-declarations.
6622
6623 2021-04-07  Jonathan Wakely  <jwakely@redhat.com>
6624
6625         PR libstdc++/99805
6626         * src/c++17/fs_path.cc (path::_M_split_cmpts): Do not call
6627         non-const member on _M_pathname, to avoid copy-on-write.
6628         * testsuite/27_io/filesystem/path/decompose/parent_path.cc:
6629         Check construction from strings that might be shared.
6630
6631 2021-04-06  Jonathan Wakely  <jwakely@redhat.com>
6632
6633         * include/bits/move.h (forward, move, move_if_noexcept)
6634         (addressof): Add _GLIBCXX_NODISCARD.
6635         * include/bits/ranges_cmp.h (identity::operator()): Add
6636         nodiscard attribute.
6637         * include/c_global/cstddef (to_integer): Likewise.
6638         * include/std/bit (bit_cast): Likewise.
6639         * include/std/utility (as_const, to_underlying): Likewise.
6640
6641 2021-04-06  Jonathan Wakely  <jwakely@redhat.com>
6642
6643         * include/bits/move.h (forward): Change static_assert message
6644         to be unambiguous about what must be true.
6645         * testsuite/20_util/forward/c_neg.cc: Adjust dg-error.
6646         * testsuite/20_util/forward/f_neg.cc: Likewise.
6647
6648 2021-04-06  Jonathan Wakely  <jwakely@redhat.com>
6649
6650         * include/bits/alloc_traits.h: Use markdown for code font.
6651         * include/bits/basic_string.h: Fix @param names.
6652         * include/bits/max_size_type.h: Remove period after @file.
6653         * include/bits/regex.h: Fix duplicate @retval names, and rename.
6654         * include/ext/pb_ds/detail/priority_queue_base_dispatch.hpp: Add
6655         group open to match existing group close.
6656         * include/ext/pb_ds/priority_queue.hpp: Add blank line before group
6657         open.
6658
6659 2021-04-06  Jonathan Wakely  <jwakely@redhat.com>
6660
6661         * include/bits/atomic_base.h: Fix doxygen group close.
6662         * include/bits/basic_ios.h: Likewise.
6663         * include/bits/forward_list.h: Likewise.
6664         * include/bits/fs_dir.h: Likewise.
6665         * include/bits/fs_ops.h: Likewise.
6666         * include/bits/fs_path.h: Likewise.
6667         * include/bits/functional_hash.h: Likewise.
6668         * include/bits/gslice.h: Likewise.
6669         * include/bits/gslice_array.h: Likewise.
6670         * include/bits/hashtable_policy.h: Likewise.
6671         * include/bits/indirect_array.h: Likewise.
6672         * include/bits/locale_classes.h: Likewise.
6673         * include/bits/locale_facets.h: Likewise.
6674         * include/bits/locale_facets_nonio.h: Likewise.
6675         * include/bits/mask_array.h: Likewise.
6676         * include/bits/refwrap.h: Likewise.
6677         * include/bits/regex.h: Likewise.
6678         * include/bits/regex_automaton.h: Likewise.
6679         * include/bits/regex_compiler.h: Likewise.
6680         * include/bits/regex_constants.h: Likewise.
6681         * include/bits/regex_error.h: Likewise.
6682         * include/bits/regex_executor.h: Likewise.
6683         * include/bits/regex_scanner.h: Likewise.
6684         * include/bits/shared_ptr.h: Likewise.
6685         * include/bits/shared_ptr_atomic.h: Likewise.
6686         * include/bits/shared_ptr_base.h: Likewise.
6687         * include/bits/slice_array.h: Likewise.
6688         * include/bits/specfun.h: Likewise.
6689         * include/bits/std_function.h: Likewise.
6690         * include/bits/std_mutex.h: Likewise.
6691         * include/bits/stl_deque.h: Likewise.
6692         * include/bits/stl_iterator.h: Likewise.
6693         * include/bits/stl_iterator_base_types.h: Likewise.
6694         * include/bits/stl_map.h: Likewise.
6695         * include/bits/stl_multimap.h: Likewise.
6696         * include/bits/stl_multiset.h: Likewise.
6697         * include/bits/stl_numeric.h: Likewise.
6698         * include/bits/stl_pair.h: Likewise.
6699         * include/bits/stl_set.h: Likewise.
6700         * include/bits/stl_uninitialized.h: Likewise.
6701         * include/bits/stream_iterator.h: Likewise.
6702         * include/bits/streambuf_iterator.h: Likewise.
6703         * include/bits/unique_ptr.h: Likewise.
6704         * include/bits/unordered_map.h: Likewise.
6705         * include/bits/unordered_set.h: Likewise.
6706         * include/decimal/decimal: Likewise.
6707         * include/experimental/any: Likewise.
6708         * include/experimental/array: Likewise.
6709         * include/experimental/bits/fs_dir.h: Likewise.
6710         * include/experimental/bits/fs_fwd.h: Likewise.
6711         * include/experimental/bits/fs_ops.h: Likewise.
6712         * include/experimental/bits/fs_path.h: Likewise.
6713         * include/experimental/buffer: Likewise.
6714         * include/experimental/internet: Likewise.
6715         * include/experimental/optional: Likewise.
6716         * include/experimental/propagate_const: Likewise.
6717         * include/experimental/socket: Likewise.
6718         * include/ext/pb_ds/assoc_container.hpp: Likewise.
6719         * include/ext/pb_ds/detail/priority_queue_base_dispatch.hpp:
6720         Likewise.
6721         * include/ext/pb_ds/detail/tree_policy/node_metadata_selector.hpp: Likewise.
6722         * include/ext/pb_ds/detail/trie_policy/node_metadata_selector.hpp: Likewise.
6723         * include/ext/pb_ds/detail/types_traits.hpp: Likewise.
6724         * include/ext/pb_ds/exception.hpp: Likewise.
6725         * include/ext/pb_ds/priority_queue.hpp: Likewise.
6726         * include/ext/pb_ds/tag_and_trait.hpp: Likewise.
6727         * include/ext/random: Likewise.
6728         * include/std/any: Likewise.
6729         * include/std/atomic: Likewise.
6730         * include/std/bitset: Likewise.
6731         * include/std/chrono: Likewise.
6732         * include/std/complex: Likewise.
6733         * include/std/condition_variable: Likewise.
6734         * include/std/fstream: Likewise.
6735         * include/std/future: Likewise.
6736         * include/std/iostream: Likewise.
6737         * include/std/istream: Likewise.
6738         * include/std/mutex: Likewise.
6739         * include/std/numeric: Likewise.
6740         * include/std/ostream: Likewise.
6741         * include/std/ratio: Likewise.
6742         * include/std/shared_mutex: Likewise.
6743         * include/std/stdexcept: Likewise.
6744         * include/std/streambuf: Likewise.
6745         * include/std/system_error: Likewise.
6746         * include/std/thread: Likewise.
6747         * include/std/valarray: Likewise.
6748         * include/std/variant: Likewise.
6749         * include/tr1/cmath: Likewise.
6750         * include/tr1/regex: Likewise.
6751         * include/tr2/dynamic_bitset: Likewise.
6752         * libsupc++/atomic_lockfree_defines.h: Likewise.
6753         * libsupc++/exception: Likewise.
6754         * libsupc++/exception.h: Likewise.
6755         * libsupc++/exception_ptr.h: Likewise.
6756         * libsupc++/nested_exception.h: Likewise.
6757
6758 2021-03-31  Alexandre Oliva  <oliva@adacore.com>
6759
6760         * testsuite/30_threads/future/members/poll.cc: Use faster
6761         after-ready call in the calibration loop.
6762
6763 2021-03-29  Jonathan Wakely  <jwakely@redhat.com>
6764
6765         * doc/xml/manual/status_cxx2017.xml: Adjust link for PSTL.
6766         * doc/html/manual/status.html: Regenerate.
6767
6768 2021-03-28  François Dumont  <fdumont@gcc.gnu.org>
6769
6770         * include/debug/forward_list
6771         (forward_list(forward_list&&, const allocator_type&)): Add noexcept qualification.
6772         * include/debug/list (list(list&&, const allocator_type&)): Likewise and add
6773         call to safe container allocator aware move constructor.
6774         * include/debug/vector (vector(vector&&, const allocator_type&)):
6775         Fix noexcept qualification.
6776         * testsuite/23_containers/forward_list/cons/noexcept_move_construct.cc:
6777         Add allocator-extended move constructor noexceot qualification check.
6778         * testsuite/23_containers/list/cons/noexcept_move_construct.cc: Likewise.
6779
6780 2021-03-26  Jonathan Wakely  <jwakely@redhat.com>
6781
6782         * src/c++11/random.cc (USE_LCG): Define when a pseudo-random
6783         fallback is needed.
6784         [USE_LCG] (bad_seed, construct_lcg_at, destroy_lcg_at, __lcg):
6785         New helper functions and callback.
6786         (random_device::_M_init): Add 'prng' and 'all' enumerators.
6787         Replace switch with fallthrough with a series of 'if' statements.
6788         [USE_LCG]: Construct an lcg_type engine and use __lcg when cpuid
6789         checks fail.
6790         (random_device::_M_init_pretr1) [USE_MT19937]: Accept "prng"
6791         token.
6792         (random_device::_M_getval): Check for callback unconditionally
6793         and always pass _M_file pointer.
6794         * testsuite/26_numerics/random/random_device/85494.cc: Remove
6795         effective-target check. Use new random_device_available helper.
6796         * testsuite/26_numerics/random/random_device/94087.cc: Likewise.
6797         * testsuite/26_numerics/random/random_device/cons/default-cow.cc:
6798         Remove effective-target check.
6799         * testsuite/26_numerics/random/random_device/cons/default.cc:
6800         Likewise.
6801         * testsuite/26_numerics/random/random_device/cons/token.cc: Use
6802         new random_device_available helper. Test "prng" token.
6803         * testsuite/util/testsuite_random.h (random_device_available):
6804         New helper function.
6805
6806 2021-03-25  François Dumont  <fdumont@gcc.gnu.org>
6807
6808         * include/debug/string
6809         (basic_string(const basic_string&, const _Alloc&)): Define even if !_GLIBCXX_USE_CXX11_ABI.
6810         (basic_string(basic_string&&, const _Alloc&)): Likewise and add noexcept qualification.
6811         (basic_string<>::erase): Adapt to take __const_iterator.
6812         (basic_string(const _CharT*, const _Allocator&)): Remove assign call.
6813         (basic_string<>::insert(const_iterator, _InputIte, _InputIte)): Try to
6814         remove iterator debug layer even if !_GLIBCXX_USE_CXX11_ABI.
6815         [_GLIBCXX_USE_CHAR8_T] (__gnu_debug::u8string): New.
6816         (__gnu_debug::u16string, __gnu_debug::u32string): New.
6817         (std::hash<__gnu_debug::basic_string<>>): New partial specialization.
6818         (std::__is_fast_hash<__gnu_debug::basic_string<>>): Likewise.
6819         * testsuite/util/exception/safety.h
6820         (erase_base<__gnu_debug::basic_string<>>): New partial specialization.
6821         (insert_base<__gnu_debug::basic_string<>>): Likewise.
6822         * testsuite/util/testsuite_container_traits.h (traits<__gnu_debug::basic_string<>>):
6823         New partial specialization.
6824         * testsuite/21_strings/basic_string/hash/debug.cc: New test.
6825         * testsuite/21_strings/basic_string/requirements/citerators.cc:
6826         Add test on __gnu_debug::string.
6827         * testsuite/21_strings/basic_string/requirements/dr438/constructor.cc: Likewise.
6828         * testsuite/21_strings/basic_string/requirements/exception/basic.cc: Likewise.
6829         * testsuite/21_strings/basic_string/requirements/exception/generation_prohibited.cc:
6830         Likewise.
6831         * testsuite/21_strings/basic_string/requirements/exception/propagation_consistent.cc:
6832         Likewise.
6833         * testsuite/21_strings/basic_string/requirements/explicit_instantiation/char/1.cc:
6834         Likewise.
6835         * testsuite/21_strings/basic_string/requirements/explicit_instantiation/char16_t/1.cc:
6836         Likewise.
6837         * testsuite/21_strings/basic_string/requirements/explicit_instantiation/char32_t/1.cc:
6838         Likewise.
6839         * testsuite/21_strings/basic_string/requirements/explicit_instantiation/char8_t/1.cc:
6840         Likewise.
6841         * testsuite/21_strings/basic_string/requirements/explicit_instantiation/wchar_t/1.cc:
6842         Likewise.
6843         * testsuite/21_strings/basic_string/requirements/typedefs.cc: Likewise.
6844
6845 2021-03-25  Jakub Jelinek  <jakub@redhat.com>
6846
6847         PR c++/99672
6848         * testsuite/18_support/source_location/consteval.cc (main): Adjust
6849         expected column numbers.
6850         * testsuite/18_support/source_location/1.cc (main): Likewise.
6851
6852 2021-03-25  Jonathan Wakely  <jwakely@redhat.com>
6853
6854         * libsupc++/new_opa.cc [!_GLIBCXX_HOSTED]: Declare malloc.
6855
6856 2021-03-25  Jonathan Wakely  <jwakely@redhat.com>
6857
6858         * testsuite/util/exception/safety.h (setup_base::generate):
6859         Support seeding random engine.
6860         (erase_point, erase_range): Adjust range of random numbers to
6861         ensure dereferenceable iterators are used where required.
6862         (generation_prohibited::run): Do not try to erase from empty
6863         containers.
6864         * testsuite/util/testsuite_containergen.h (test_containers):
6865         Support seeding random engine.
6866
6867 2021-03-23  Jonathan Wakely  <jwakely@redhat.com>
6868
6869         * testsuite/std/ranges/adaptors/reverse.cc: Replace duplicated
6870         line with a check that uses the const being/end overloads.
6871
6872 2021-03-23  Moritz Sichert  <sichert@in.tum.de>
6873
6874         * include/std/ranges (reverse_view::begin, reverse_view::end):
6875         Qualify make_reverse_iterator calls to avoid ADL.
6876         * testsuite/std/ranges/adaptors/reverse.cc: Test that
6877         views::reverse works when make_reverse_iterator is defined
6878         in an associated namespace.
6879
6880 2021-03-23  Jonathan Wakely  <jwakely@redhat.com>
6881
6882         * include/bits/c++config (_GLIBCXX_LONG_DOUBLE_ALT128_COMPAT):
6883         Do not define when compiling with Clang.
6884
6885 2021-03-22  Jonathan Wakely  <jwakely@redhat.com>
6886
6887         * include/std/string_view (basic_string_view(Range&&)): Define new
6888         constructor and deduction guide.
6889         * testsuite/21_strings/basic_string_view/cons/char/range_c++20.cc: New test.
6890         * testsuite/21_strings/basic_string_view/cons/wchar_t/range_c++20.cc: New test.
6891
6892 2021-03-22  Jonathan Wakely  <jwakely@redhat.com>
6893
6894         * include/bits/range_access.h (begin(T (&)[N]), end(T (&)[N])):
6895         Add missing 'noexcept' as per LWG 2280.
6896         (rbegin(T (&)[N]), rend(T (&)[N]), rbegin(initializer_list<T>))
6897         (rend(initializer_list<T>)): Add 'noexcept' as per LWG 3537.
6898         * testsuite/24_iterators/range_access/range_access.cc: Check for
6899         expected noexcept specifiers. Check result types of generic
6900         std::begin and std::end overloads.
6901         * testsuite/24_iterators/range_access/range_access_cpp14.cc:
6902         Check for expected noexcept specifiers.
6903         * testsuite/24_iterators/range_access/range_access_cpp17.cc:
6904         Likewise.
6905
6906 2021-03-19  Jonathan Wakely  <jwakely@redhat.com>
6907
6908         * include/std/type_traits (is_scoped_enum): Define.
6909         * include/std/version (__cpp_lib_is_scoped_enum): Define.
6910         * testsuite/20_util/is_scoped_enum/value.cc: New test.
6911         * testsuite/20_util/is_scoped_enum/version.cc: New test.
6912
6913 2021-03-16  Jonathan Wakely  <jwakely@redhat.com>
6914
6915         PR libstdc++/99341
6916         * config/abi/post/aarch64-linux-gnu/baseline_symbols.txt: Remove
6917         std::once_flag symbols.
6918         * config/abi/post/ia64-linux-gnu/baseline_symbols.txt: Likewise.
6919         * config/abi/post/m68k-linux-gnu/baseline_symbols.txt: Likewise.
6920         * config/abi/post/riscv64-linux-gnu/baseline_symbols.txt:
6921         Likewise.
6922         * config/abi/pre/gnu.ver: Likewise.
6923         * src/c++11/mutex.cc [_GLIBCXX_HAVE_LINUX_FUTEX]
6924         (struct __once_flag_compat): Remove.
6925         (_ZNSt9once_flag11_M_activateEv): Remove.
6926         (_ZNSt9once_flag9_M_finishEb): Remove.
6927
6928 2021-03-16  Jonathan Wakely  <jwakely@redhat.com>
6929
6930         PR libstdc++/99341
6931         * include/std/mutex [_GLIBCXX_HAVE_LINUX_FUTEX] (once_flag):
6932         Revert to pthread_once_t implementation.
6933         [_GLIBCXX_HAVE_LINUX_FUTEX] (call_once): Likewise.
6934         * src/c++11/mutex.cc [_GLIBCXX_HAVE_LINUX_FUTEX]
6935         (struct __once_flag_compat): New type matching the reverted
6936         implementation of once_flag using futexes.
6937         (once_flag::_M_activate): Remove, replace with ...
6938         (_ZNSt9once_flag11_M_activateEv): ... alias symbol.
6939         (once_flag::_M_finish): Remove, replace with ...
6940         (_ZNSt9once_flag9_M_finishEb): ... alias symbol.
6941         * testsuite/30_threads/call_once/66146.cc: Removed.
6942
6943 2021-03-15  Iain Sandoe  <iain@sandoe.co.uk>
6944
6945         * testsuite/17_intro/names.cc: Exclude j from the list
6946         of test symbols for Darwin.
6947
6948 2021-03-15  Iain Sandoe  <iain@sandoe.co.uk>
6949
6950         * config/os/bsd/darwin/ppc-extra.ver: Add matching for
6951         to_chars and from_chars for long double.
6952
6953 2021-03-15  Patrick Palka  <ppalka@redhat.com>
6954
6955         * include/bits/max_size_type.h (__max_size_type::operator _Tp):
6956         Fix formatting.
6957         (__max_size_type::operator++): Define.
6958         (__max_size_type::operator--): Likewise.
6959         (__max_size_type::operator<=>): Conditionally define (in place
6960         of the other comparison operators).
6961         (__max_diff_type::operator _Tp): Fix formatting.
6962         (__max_diff_type::operator++): Define.
6963         (__max_diff_type::operator--): Likewise.
6964         (__max_diff_type::operator<=>): Conditionally define (in place
6965         of the other comparison operators).
6966         * testsuite/std/ranges/iota/max_size_type.cc (test01): Test
6967         these operator overloads.
6968
6969 2021-03-15  Caroline Tice  <cmtice@google.com>
6970
6971         PR libstdc++/99172
6972         * src/Makefile.am (AM_CXXFLAGS_PRE, AM_CXXFLAGS): Add
6973         AM_CXXFLAGS_PRE with the old definition of AM_CXXFLAGS; make
6974         AM_CXXFLAGS to be AM_CXXFLAGS_PRE with '-fvtable-verify=std'
6975         filtered out.
6976         * src/Makefile.in: Regenerate.
6977
6978 2021-03-11  Patrick Palka  <ppalka@redhat.com>
6979
6980         * src/c++17/floating_to_chars.cc: Simplify the file as if
6981         __SIZEOF_INT128__ is always defined.
6982         [!defined __SIZEOF_INT128__]: Include "uint128_t.h".  Define
6983         a base-10 to_chars overload for the uint128_t class type.
6984         * src/c++17/uint128_t.h: New file.
6985         * testsuite/20_util/to_chars/long_double.cc: No longer expect an
6986         execution FAIL on targets that have a large long double type
6987         but lack __int128.
6988
6989 2021-03-11  Patrick Palka  <ppalka@redhat.com>
6990
6991         * src/c++17/ryu/LOCAL_PATCHES: Update.
6992         * src/c++17/ryu/d2s_intrinsics.h: Don't define uint128_t.
6993         * src/c++17/ryu/generic_128.h: Likewise.
6994         * src/c++17/ryu/ryu_generic_128.h (struct floating_decimal_128):
6995         Use uint128_t instead of __uint128_t.
6996         (generic_binary_to_decimal): Likewise.
6997
6998 2021-03-11  Patrick Palka  <ppalka@redhat.com>
6999
7000         * src/c++17/ryu/LOCAL_PATCHES: New file.
7001
7002 2021-03-11  Patrick Palka  <ppalka@redhat.com>
7003
7004         * src/c++17/floating_to_chars.cc (uint128_t): New conditionally
7005         defined alias of unsigned __int128.
7006         (floating_type_traits_binary128::mantissa_t): Use uint128_t
7007         instead of unsigned __int128.
7008         (floating_type_traits<long double>::mantissa_t)
7009         [LONG_DOUBLE_KIND == LDK_IBM128]: Likewise.
7010         (get_ieee_repr): Likewise.  Make casts from uint_t to mantissa_t
7011         and uint32_t explicit.  Simplify the extraction of mantissa,
7012         exponent and sign bit.
7013
7014 2021-03-11  Jonathan Wakely  <jwakely@redhat.com>
7015
7016         * include/std/barrier (barrier::arrival_token): New move-only
7017         class that encapsulates the underlying token value.
7018
7019 2021-03-11  Jonathan Wakely  <jwakely@redhat.com>
7020
7021         * python/libstdcxx/v6/printers.py (find_type): Use tag attribute
7022         instead of unqualified() method.
7023
7024 2021-03-11  Jonathan Wakely  <jwakely@redhat.com>
7025
7026         PR libstdc++/99537
7027         * include/std/stop_token (_Stop_state_t::_M_release_ownership):
7028         Use acq_rel memory ordering.
7029
7030 2021-03-11  Jonathan Wakely  <jwakely@redhat.com>
7031
7032         PR libstdc++/99533
7033         * src/c++17/fs_dir.cc (recursive_directory_iterator): Use new
7034         helper function to check for permission denied errors.
7035         * src/filesystem/dir.cc (recursive_directory_iterator):
7036         Likewise.
7037         * src/filesystem/dir-common.h (is_permission_denied_error): New
7038         helper function.
7039
7040 2021-03-11  Jonathan Wakely  <jwakely@redhat.com>
7041
7042         PR libstdc++/99536
7043         * include/bits/random.h (normal_distribution): Use
7044         default-initializer for _M_saved and _M_saved_available.
7045
7046 2021-03-10  John David Anglin  <danglin@gcc.gnu.org>
7047
7048         * testsuite/29_atomics/atomic/wait_notify/bool.cc: Add options to
7049         link with libatomic.
7050         * testsuite/29_atomics/atomic/wait_notify/generic.cc: Likewise.
7051         * testsuite/29_atomics/atomic/wait_notify/pointers.cc: Likewise.
7052         * testsuite/29_atomics/atomic_flag/wait_notify/1.cc: Likewise.
7053         * testsuite/30_threads/barrier/arrive.cc: Likewise.
7054         * testsuite/30_threads/barrier/arrive_and_drop.cc: Likewise.
7055         * testsuite/30_threads/barrier/arrive_and_wait.cc: Likewise.
7056         * testsuite/30_threads/barrier/completion.cc: Likewise.
7057         * testsuite/30_threads/latch/3.cc: Likewise.
7058         * testsuite/30_threads/semaphore/try_acquire.cc: Likewise.
7059         * testsuite/30_threads/semaphore/try_acquire_for.cc: Likewise.
7060         * testsuite/30_threads/semaphore/try_acquire_until.cc: Likewise.
7061
7062 2021-03-10  Jonathan Wakely  <jwakely@redhat.com>
7063
7064         PR libstdc++/99413
7065         * include/bits/align.h: Include debug/assertions.h.
7066         * include/bits/codecvt.h: Include bits/c++config.h.
7067         * include/bits/enable_special_members.h: Likewise.
7068         * include/bits/erase_if.h: Likewise.
7069         * include/bits/functional_hash.h: Include <type_traits>.
7070         * include/bits/invoke.h: Include bits/move.h.
7071         * include/bits/ostream_insert.h: Include bits/exception_defines.h.
7072         * include/bits/parse_numbers.h: Include <type_traits>.
7073         * include/bits/predefined_ops.h: Include bits/c++config.h.
7074         * include/bits/range_access.h: Include bits/stl_iterator.h.
7075         * include/bits/stl_bvector.h: Do not include bits/stl_vector.h.
7076         * include/bits/stl_iterator.h: Include bits/stl_iterator_base_types.h.
7077         * include/bits/stl_uninitialized.h: Include bits/stl_algobase.h.
7078         * include/bits/uniform_int_dist.h: Include bits/concept_check.h.
7079         * include/bits/unique_lock.h: Include bits/std_mutex.h.
7080         * include/debug/assertions.h: Include bits/c++config.h.
7081
7082 2021-03-10  Jonathan Wakely  <jwakely@redhat.com>
7083
7084         * include/bits/ranges_cmp.h (__eq_builtin_ptr_cmp): Remove.
7085         (ranges::equal_to, ranges::not_equal_to): Do not constrain
7086         with __eq_builtin_ptr_cmp.
7087         (ranges::less, ranges::greater, ranges::less_equal)
7088         (ranges::greater_equal): Do not constrain with
7089         __less_builtin_ptr_cmp.
7090         * libsupc++/compare (compare_three_way): Do not constrain with
7091         __3way_builtin_ptr_cmp.
7092         * testsuite/18_support/comparisons/object/builtin-ptr-three-way.cc: Moved to...
7093         * testsuite/18_support/comparisons/object/lwg3530.cc: ...here.
7094         * testsuite/20_util/function_objects/range.cmp/lwg3530.cc: New test.
7095
7096 2021-03-10  Jonathan Wakely  <jwakely@redhat.com>
7097
7098         * testsuite/std/time/syn_c++20.cc: Enable synopsis checks for
7099         C++20 calendar types.
7100
7101 2021-03-06  Jakub Jelinek  <jakub@redhat.com>
7102
7103         PR libstdc++/99396
7104         * include/std/bit (__rotl, __rotr): Add optimized variants for power of
7105         two _Nd which the compiler can pattern match the rotates.
7106
7107 2021-03-04  Jonathan Wakely  <jwakely@redhat.com>
7108
7109         PR libstdc++/99382
7110         * testsuite/20_util/specialized_algorithms/uninitialized_default_n/sizes.cc:
7111         Make storage larger than required. Verify no write to the last
7112         element.
7113         * testsuite/20_util/specialized_algorithms/uninitialized_value_construct_n/sizes.cc:
7114         Likewise.
7115
7116 2021-03-03  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
7117
7118         * config/abi/post/i386-solaris/baseline_symbols.txt: Regenerate.
7119         * config/abi/post/i386-solaris/amd64/baseline_symbols.txt:
7120         Likewise.
7121         * config/abi/post/sparc-solaris/baseline_symbols.txt: Likewise.
7122         * config/abi/post/sparc-solaris/sparcv9/baseline_symbols.txt:
7123         Likewise.
7124
7125 2021-03-03  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
7126
7127         * include/experimental/bits/simd.h: Replace reserved _X, _B by
7128         _Xp, _Bp.
7129         * include/experimental/bits/simd_builtin.h: Likewise.
7130         * include/experimental/bits/simd_x86.h: Likewise.
7131
7132 2021-02-27  Jonathan Wakely  <jwakely@redhat.com>
7133
7134         PR libstdc++/99301
7135         * include/std/chrono (year_month_day::_M_days_since_epoch()):
7136         Convert chrono::month and chrono::day to unsigned before
7137         converting to uint32_t.
7138
7139 2021-02-25  Jonathan Wakely  <jwakely@redhat.com>
7140
7141         * include/std/chrono (year_month_day::_S_from_days): Perform
7142         all calculations with type uint32_t.
7143
7144 2021-02-25  Jonathan Wakely  <jwakely@redhat.com>
7145
7146         * doc/xml/manual/abi.xml: Document versioning for GCC 11.
7147         * doc/html/manual/abi.html: Regenerate.
7148
7149 2021-02-25  Jonathan Wakely  <jwakely@redhat.com>
7150
7151         PR libstdc++/99270
7152         * testsuite/27_io/headers/cstdio/types_std.cc: Use pointer to
7153         FILE instead of FILE.
7154
7155 2021-02-25  Andreas Schwab  <schwab@suse.de>
7156
7157         * config/abi/post/aarch64-linux-gnu/baseline_symbols.txt: Update.
7158         * config/abi/post/ia64-linux-gnu/baseline_symbols.txt: Update.
7159         * config/abi/post/m68k-linux-gnu/baseline_symbols.txt: Update.
7160         * config/abi/post/riscv64-linux-gnu/baseline_symbols.txt: Update.
7161
7162 2021-02-25  Jonathan Wakely  <jwakely@redhat.com>
7163
7164         PR libstdc++/99265
7165         * include/std/chrono (year_month_day::_S_from_days): Cast long
7166         to int explicitly.
7167
7168 2021-02-25  Jonathan Wakely  <jwakely@redhat.com>
7169
7170         * include/std/utility (to_underlying): Define.
7171         * include/std/version (__cpp_lib_to_underlying): Define.
7172         * testsuite/20_util/to_underlying/1.cc: New test.
7173         * testsuite/20_util/to_underlying/version.cc: New test.
7174
7175 2021-02-24  Jonathan Wakely  <jwakely@redhat.com>
7176
7177         PR libstdc++/99261
7178         * src/c++17/floating_to_chars.cc (sprintf_ld): Add extra args
7179         before value to be printed.
7180
7181 2021-02-24  Patrick Palka  <ppalka@redhat.com>
7182
7183         * src/c++17/floating_to_chars.cc (__floating_to_chars_precision):
7184         Relax the condition that guards the printf code path to accept
7185         F128_type as well as long double.
7186
7187 2021-02-24  Cassio Neri  <cassio.neri@gmail.com>
7188
7189         * include/std/chrono (year_month_day_last:day): New
7190         implementation.
7191
7192 2021-02-24  Cassio Neri  <cassio.neri@gmail.com>
7193
7194         * include/std/chrono (year::is_leap): New implementation.
7195         * testsuite/std/time/year/2.cc: New test.
7196
7197 2021-02-24  Cassio Neri  <cassio.neri@gmail.com>
7198
7199         * include/std/chrono (year_month_day::_M_days_since_epoch):
7200         New implementation.
7201         * testsuite/std/time/year_month_day/4.cc: New test.
7202
7203 2021-02-24  Cassio Neri  <cassio.neri@gmail.com>
7204
7205         * include/std/chrono (year_month_day::_S_from_days): New
7206         implementation.
7207         * testsuite/std/time/year_month_day/3.cc: New test.
7208
7209 2021-02-24  Patrick Palka  <ppalka@redhat.com>
7210
7211         PR libstdc++/98384
7212         * testsuite/20_util/to_chars/long_double.cc: Include <optional>.
7213         (test01): Simplify verifying the nearby values by using a
7214         2-iteration loop and a dedicated output buffer to check that the
7215         nearby values are different.  Factor out the printf-based
7216         verification into a local function, and check that the leading
7217         hex digits agree before comparing to the output of printf.  Also
7218         verify the output by round-tripping it through from_chars.
7219
7220 2021-02-24  Jonathan Wakely  <jwakely@redhat.com>
7221
7222         PR libstdc++/98389
7223         * config/abi/pre/gnu.ver (GLIBCXX_3.4.29): Do not match to_chars
7224         symbols for long double arguments mangled as 'g'.
7225         * config/os/gnu-linux/ldbl-extra.ver: Likewise.
7226         * config/os/gnu-linux/ldbl-ieee128-extra.ver: Likewise.
7227         * src/c++17/Makefile.am [GLIBCXX_LDBL_ALT128_COMPAT_TRUE]:
7228         Use -mabi=ibmlongdouble for floating_to_chars.cc.
7229         * src/c++17/Makefile.in: Regenerate.
7230         * src/c++17/floating_to_chars.cc (floating_type_traits_binary128):
7231         New type defining type traits of IEEE binary128 format.
7232         (floating_type_traits<__float128>): Define specialization.
7233         (floating_type_traits<long double>): Define in terms of
7234         floating_type_traits_binary128 when appropriate.
7235         (floating_to_shortest_scientific): Handle __float128.
7236         (sprintf_ld): New function template for printing a long double
7237         or __ieee128 value using sprintf.
7238         (__floating_to_chars_shortest, __floating_to_chars_precision):
7239         Use sprintf_ld.
7240         (to_chars): Define overloads for __float128.
7241
7242 2021-02-24  Jonathan Wakely  <jwakely@redhat.com>
7243
7244         * testsuite/17_intro/names.cc: Undefine 'u' on powerpc*-linux*.
7245
7246 2021-02-23  Martin Sebor  <msebor@redhat.com>
7247
7248         PR c++/99074
7249         * libsupc++/dyncast.cc (__dynamic_cast): Return null when
7250         first argument is null.
7251
7252 2021-02-23  Jakub Jelinek  <jakub@redhat.com>
7253
7254         PR libstdc++/99181
7255         * testsuite/21_strings/char_traits/requirements/char/99181.cc: New
7256         test.
7257
7258 2021-02-23  Jakub Jelinek  <jakub@redhat.com>
7259
7260         PR libstdc++/99181
7261         * include/bits/char_traits.h (char_traits<char>::compare): For
7262         constexpr evaluation don't call
7263         __gnu_cxx::char_traits<char_type>::compare but do the comparison loop
7264         directly.
7265
7266 2021-02-23  Jakub Jelinek  <jakub@redhat.com>
7267
7268         PR libstdc++/97549
7269         * include/pstl/parallel_backend_serial.h: Remove __pstl::__par_backend.
7270
7271 2021-02-23  Patrick Palka  <ppalka@redhat.com>
7272
7273         PR libstdc++/98384
7274         * src/c++17/floating_to_chars.cc (get_ieee_repr): Extract
7275         the high- and low-order parts from an IBM long double value
7276         in an endian-agnostic way.
7277
7278 2021-02-19  Jonathan Wakely  <jwakely@redhat.com>
7279
7280         * include/bits/atomic_wait.h (__thread_relax()): Call
7281         __thread_yield() not __gthread_yield().
7282
7283 2021-02-15  Jonathan Wakely  <jwakely@redhat.com>
7284
7285         * include/bits/atomic_wait.h (__thread_yield()): Check
7286         _GLIBCXX_HAS_GTHREADS before using __gthread_yield.
7287         (__thread_relax()): Use __thread_yield() instead of repeating
7288         the preprocessor checks for __gthread_yield.
7289
7290 2021-02-15  Jonathan Wakely  <jwakely@redhat.com>
7291
7292         * include/std/mutex (once_flag::_M_activate()): Add explicit
7293         return statement for passive case.
7294         (once_flag::_M_finish(bool)): Use reserved name for parameter.
7295
7296 2021-02-14  Jonathan Wakely  <jwakely@redhat.com>
7297
7298         PR libstdc++/99096
7299         * testsuite/util/testsuite_fs.h: Always include <unistd.h>.
7300
7301 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
7302
7303         PR libstdc++/88881
7304         * src/c++17/fs_ops.cc (fs::symlink_status): Re-enable workaround.
7305
7306 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
7307
7308         * doc/xml/manual/status_cxx2014.xml: Document implementation
7309         specific properties of std::experimental::filesystem::rename.
7310         * doc/xml/manual/status_cxx2017.xml: Document implementation
7311         specific properties of std::filesystem::rename.
7312         * doc/html/*: Regenerate.
7313         * src/c++17/fs_ops.cc (fs::rename): Implement correct behaviour
7314         for directories on Windows.
7315         * src/filesystem/ops-common.h (__gnu_posix::rename): Use
7316         MoveFileExW on Windows.
7317         * testsuite/27_io/filesystem/operations/rename.cc: New test.
7318         * testsuite/experimental/filesystem/operations/rename.cc: New test.
7319
7320 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
7321
7322         * testsuite/util/testsuite_fs.h (nonexistent_path): Add
7323         random number to the path.
7324
7325 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
7326
7327         * include/experimental/internet (address_v6::to_string): Include
7328         scope ID in string.
7329         * testsuite/experimental/net/internet/address/v6/members.cc:
7330         Test to_string() results.
7331
7332 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
7333
7334         * include/experimental/internet (address_v6::any): Avoid using
7335         memcpy in constexpr function.
7336         (address_v6::loopback): Likewise.
7337         (make_address_v6): Fix missing return statements on error paths.
7338         * include/experimental/io_context: Avoid -Wdangling-else
7339         warning.
7340         * testsuite/experimental/net/internet/address/v4/members.cc:
7341         Remove unused variables.
7342         * testsuite/experimental/net/internet/address/v6/members.cc:
7343         New test.
7344
7345 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
7346
7347         * include/bits/shared_ptr_base.h (__shared_ptr::_M_get_deleter):
7348         Add unused attribute to parameter.
7349         * src/c++11/shared_ptr.cc (_Sp_make_shared_tag::_S_eq):
7350         Likewise.
7351
7352 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
7353
7354         * testsuite/27_io/basic_ostream/emit/1.cc: Expect test to fail
7355         if -fno-rtti is used.
7356         * testsuite/30_threads/async/forced_unwind.cc: Expect test
7357         to abort if -fno-rtti is used.
7358
7359 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
7360
7361         * testsuite/util/testsuite_allocator.h (memory_resource):
7362         Remove requirement for RTTI and exceptions to be enabled.
7363
7364 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
7365
7366         * testsuite/27_io/basic_istringstream/rdbuf/char/2832.cc: Use
7367         static_cast when RTTI is disabled.
7368         * testsuite/27_io/basic_istringstream/rdbuf/wchar_t/2832.cc:
7369         Likewise.
7370         * testsuite/27_io/basic_ostringstream/rdbuf/char/2832.cc:
7371         Likewise.
7372         * testsuite/27_io/basic_ostringstream/rdbuf/wchar_t/2832.cc:
7373         Likewise.
7374         * testsuite/27_io/basic_stringstream/str/char/2.cc:
7375         Likewise.
7376         * testsuite/27_io/basic_stringstream/str/wchar_t/2.cc:
7377         Likewise.
7378
7379 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
7380
7381         * include/std/ostream (__syncbuf_base::_S_get): Mark parameter
7382         as unused and only use dynamic_cast when RTTI is enabled.
7383
7384 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
7385
7386         PR libstdc++/99077
7387         * src/c++11/cxx11-ios_failure.cc (__ios_failure(const char*, int)):
7388         Change int parameter to error_code, to match std::ios_failure.
7389         (__throw_ios_failure(const char*, int)): Construct error_code
7390         from int parameter.
7391
7392 2021-02-11  Jonathan Wakely  <jwakely@redhat.com>
7393
7394         * libsupc++/eh_ptr.cc (_GLIBCXX_EH_PTR_RELOPS_COMPAT): Define
7395         new macro.
7396         * libsupc++/exception_ptr.h (_GLIBCXX_EH_PTR_USED): Check new
7397         macro instead of _GLIBCXX_EH_PTR_COMPAT.
7398         (operator==): Likewise.
7399
7400 2021-02-11  Jonathan Wakely  <jwakely@redhat.com>
7401
7402         PR libstdc++/99058
7403         * doc/xml/manual/status_cxx2011.xml: Document when support
7404         became stable.
7405         * doc/xml/manual/status_cxx2014.xml: Likewise.
7406         * doc/xml/manual/status_cxx2017.xml: Likewise.
7407         * doc/html/manual/status.html: Regenerate.
7408
7409 2021-02-10  Jonathan Wakely  <jwakely@redhat.com>
7410
7411         PR libstdc++/88881
7412         * src/c++17/fs_ops.cc (fs::status): Re-enable workaround.
7413
7414 2021-02-10  Jonathan Wakely  <jwakely@redhat.com>
7415
7416         * src/c++17/fs_ops.cc (fs::create_hard_link, fs::equivalent)
7417         (fs::remove): Use std::system_category() for error codes from
7418         GetLastError().
7419         * src/filesystem/ops.cc (fs::create_hard_link, fs::remove):
7420         Likewise.
7421
7422 2021-02-10  Jonathan Wakely  <jwakely@redhat.com>
7423
7424         * testsuite/27_io/filesystem/operations/proximate.cc: Fix typo
7425         in __MINGW32__ macro name.
7426         * testsuite/27_io/filesystem/path/compare/lwg2936.cc: Likewise.
7427         * testsuite/27_io/filesystem/path/generation/proximate.cc:
7428         Likewise.
7429         * testsuite/27_io/filesystem/path/generation/relative.cc:
7430         Likewise.
7431         * testsuite/util/testsuite_fs.h: Likewise.
7432
7433 2021-02-09  François Dumont  <fdumont@gcc.gnu.org>
7434
7435         * include/bits/stl_tree.h
7436         (__has_is_transparent, __has_is_transparent_t): Move...
7437         * include/bits/stl_function.h: ...here.
7438         * include/bits/hashtable_policy.h (_Hash_code_base<>::_M_hash_code_tr): New..
7439         (_Hashtable_base<>::_M_equals_tr): New.
7440         * include/bits/hashtable.h (_Hashtable<>::_M_find_tr, _Hashtable<>::_M_count_tr,
7441         _Hashtable<>::_M_equal_range_tr): New member function templates to perform
7442         heterogeneous lookup.
7443         (_Hashtable<>::_M_find_before_node_tr): New.
7444         (_Hashtable<>::_M_find_node_tr): New.
7445         * include/bits/unordered_map.h (unordered_map::find<>, unordered_map::count<>,
7446         unordered_map::contains<>, unordered_map::equal_range<>): New member function
7447         templates to perform heterogeneous lookup.
7448         (unordered_multimap::find<>, unordered_multimap::count<>,
7449         unordered_multimap::contains<>, unordered_multimap::equal_range<>): Likewise.
7450         * include/bits/unordered_set.h  (unordered_set::find<>, unordered_set::count<>,
7451         unordered_set::contains<>, unordered_set::equal_range<>): Likewise.
7452         (unordered_multiset::find<>, unordered_multiset::count<>,
7453         unordered_multiset::contains<>, unordered_multiset::equal_range<>): Likewise.
7454         * include/debug/unordered_map
7455         (unordered_map::find<>, unordered_map::equal_range<>): Likewise.
7456         (unordered_multimap::find<>, unordered_multimap::equal_range<>): Likewise.
7457         * include/debug/unordered_set
7458         (unordered_set::find<>, unordered_set::equal_range<>): Likewise.
7459         (unordered_multiset::find<>, unordered_multiset::equal_range<>): Likewise.
7460         * testsuite/23_containers/unordered_map/operations/1.cc: New test.
7461         * testsuite/23_containers/unordered_multimap/operations/1.cc: New test.
7462         * testsuite/23_containers/unordered_multiset/operations/1.cc: New test.
7463         * testsuite/23_containers/unordered_set/operations/1.cc: New test.
7464
7465 2021-02-09  François Dumont  <fdumont@gcc.gnu.org>
7466
7467         * include/bits/stl_deque.h
7468         (std::operator-(deque::iterator, deque::iterator)): Replace if/then with
7469         a null pointer test.
7470
7471 2021-02-09  Jonathan Wakely  <jwakely@redhat.com>
7472
7473         * testsuite/27_io/filesystem/operations/remove_all.cc: Remove
7474         test directory after making it writable again.
7475         * testsuite/experimental/filesystem/operations/remove_all.cc:
7476         Likewise.
7477
7478 2021-02-09  Jonathan Wakely  <jwakely@redhat.com>
7479
7480         PR libstdc++/99021
7481         * include/std/coroutine (coroutine_handle<P>::from_address): Add
7482         noexcept.
7483
7484 2021-02-09  Vladimir Vishnevsky  <vv.os.swe@gmail.com>
7485
7486         * include/ext/stdio_sync_filebuf.h: Remove unused <unistd.h>.
7487         * src/c++17/fs_ops.cc (fs::permissions): Qualify mode_t.
7488
7489 2021-02-09  Jakub Jelinek  <jakub@redhat.com>
7490
7491         PR middle-end/98465
7492         * include/bits/basic_string.tcc (basic_string::_M_replace): When __s
7493         points to the characters moved by earlier _S_move, compute the source
7494         address using expression based on the __p pointer rather than __s
7495         pointer.
7496
7497 2021-02-03  Jonathan Wakely  <jwakely@redhat.com>
7498
7499         * testsuite/19_diagnostics/error_code/operators/not_equal.cc:
7500         Add comparison with same category and different values.
7501         * testsuite/19_diagnostics/error_code/operators/less.cc:
7502         Likewise. Fix comparison involving different categories.
7503         * testsuite/19_diagnostics/error_code/operators/three_way.cc:
7504         Likewise.
7505         * testsuite/19_diagnostics/error_condition/operators/less.cc:
7506         Add comment.
7507         * testsuite/19_diagnostics/error_condition/operators/three_way.cc:
7508         Likewise.
7509
7510 2021-02-03  yaozhongxiao  <yaozhongxiao@linux.alibaba.com>
7511
7512         * include/experimental/bits/simd_neon.h: Replace repeated vpadd
7513         calls with a single vaddv for aarch64.
7514
7515 2021-02-03  Matthias Kretz  <kretz@kde.org>
7516
7517         * testsuite/Makefile.am: Warn about the workaround. Add
7518         -fno-tree-vrp to CXXFLAGS passed to the check_simd script.
7519         Improve initial user feedback from make check-simd.
7520         * testsuite/Makefile.in: Regenerated.
7521
7522 2021-02-03  Matthias Kretz  <kretz@kde.org>
7523
7524         * include/experimental/bits/simd.h: Add __detail::_Minimum and
7525         __detail::_Maximum to use them as _BinaryOperation to _S_reduce.
7526         Add hmin and hmax overloads for simd and const_where_expression.
7527         * include/experimental/bits/simd_scalar.h
7528         (_SimdImplScalar::_S_reduce): Make unused _BinaryOperation
7529         parameter const-ref to allow calling _S_reduce with an rvalue.
7530         * testsuite/experimental/simd/tests/reductions.cc: Add tests for
7531         hmin and hmax. Since the compiler statically determined that all
7532         tests pass, repeat the test after a call to make_value_unknown.
7533
7534 2021-02-03  Matthias Kretz  <kretz@kde.org>
7535
7536         * testsuite/experimental/simd/tests/bits/verify.h (verify): Add
7537         instruction pointer data member. Ensure that the `if (m_failed)`
7538         branch is always inlined into the calling code. The body of the
7539         conditional can still be a function call. Move the get_ip call
7540         into the verify ctor to simplify the ctor calls.
7541         (COMPARE): Don't mention the use of all_of for reduction of a
7542         simd_mask. It only distracts from the real issue.
7543
7544 2021-02-03  Matthias Kretz  <kretz@kde.org>
7545
7546         * testsuite/experimental/simd/driver.sh: Abstract reading test
7547         options into read_src_option function. Read skip, only,
7548         expensive, and xfail via read_src_option. Add timeout and
7549         timeout-factor options and adjust timeout variable accordingly.
7550         * testsuite/experimental/simd/tests/loadstore.cc: Set
7551         timeout-factor 2.
7552
7553 2021-02-03  Matthias Kretz  <kretz@kde.org>
7554
7555         * testsuite/experimental/simd/driver.sh: When handling the pipe
7556         to log (and on verbose to stdout) count the lines. If it exceeds
7557         1000 log the issue and exit 125, which is then handled as a
7558         failure.
7559
7560 2021-02-03  Matthias Kretz  <kretz@kde.org>
7561
7562         * testsuite/experimental/simd/tests/hypot3_fma.cc: Add skip:
7563         markup for long double on powerpc64*.
7564
7565 2021-02-03  Matthias Kretz  <kretz@kde.org>
7566
7567         * include/experimental/bits/simd.h: Add __have_power10vec
7568         conditional on _ARCH_PWR10.
7569         * include/experimental/bits/simd_builtin.h: Forward declare
7570         _MaskImplPpc and use it as _MaskImpl when __ALTIVEC__ is
7571         defined.
7572         (_MaskImplBuiltin::_S_some_of): Call _S_popcount from the
7573         _SuperImpl for optimizations and correctness.
7574         * include/experimental/bits/simd_ppc.h: Add _MaskImplPpc.
7575         (_MaskImplPpc::_S_popcount): Implement via vec_cntm for POWER10.
7576         Otherwise, for >=int use -vec_sums divided by a sizeof factor.
7577         For <int use -vec_sums(vec_sum4s(...)) to sum all mask entries.
7578
7579 2021-02-03  Matthias Kretz  <kretz@kde.org>
7580
7581         * testsuite/experimental/simd/driver.sh: Remove executable on
7582         SIGINT. Process compiler and test executable output: In verbose
7583         mode print messages immediately, limited to 1000 lines and
7584         breaking long lines to below $COLUMNS (or 1024 if not set).
7585         Communicating the exit status of the compiler / test with the
7586         necessary pipe is done via a message through stdout/-in.
7587
7588 2021-02-03  Matthias Kretz  <kretz@kde.org>
7589
7590         * testsuite/Makefile.am: Ensure .simd.summary is empty before
7591         collecting a new summary.
7592         * testsuite/Makefile.in: Regenerate.
7593
7594 2021-02-03  Matthias Kretz  <kretz@kde.org>
7595
7596         * testsuite/experimental/simd/generate_makefile.sh: Use
7597         different variables internally than documented for user
7598         overrides. This makes internal append/prepend work as intended.
7599
7600 2021-02-03  Matthias Kretz  <kretz@kde.org>
7601
7602         * testsuite/experimental/simd/driver.sh (verify_test): Print
7603         test output on run xfail. Do not repeat lines from the log that
7604         were already printed on stdout.
7605         (test_selector): Make the compiler flags pattern usable as a
7606         substring selector.
7607         (toplevel): Trap on SIGINT and remove the log and sum files.
7608         Call timout with --foreground to quickly terminate on SIGINT.
7609         * testsuite/experimental/simd/generate_makefile.sh: Simplify run
7610         targets via target patterns. Default DRIVEROPTS to -v for run
7611         targets. Remove log and sum files after completion of the run
7612         target (so that it's always recompiled).
7613         Place help text into text file for reasonable 'make help'
7614         performance.
7615
7616 2021-02-03  Matthias Kretz  <kretz@kde.org>
7617
7618         * include/experimental/bits/simd.h: Remove unnecessary static
7619         assertion. Allow sizeof(8) integer __intrinsic_type to enable
7620         the necessary mask type.
7621
7622 2021-02-03  Matthias Kretz  <kretz@kde.org>
7623
7624         * include/experimental/bits/simd.h: Let __intrinsic_type<long
7625         double, N> be valid if sizeof(long double) == sizeof(double) and
7626         use a __vector double as member type.
7627
7628 2021-02-03  Matthias Kretz  <kretz@kde.org>
7629
7630         * include/experimental/bits/simd.h (__is_intrinsic_type): New
7631         internal type trait. Alias for __is_vector_type on x86.
7632         (_VectorTraitsImpl): Enable for __intrinsic_type in addition for
7633         __vector_type.
7634         (__intrin_bitcast): Allow casting to & from vector & intrinsic
7635         types.
7636         (__intrinsic_type): Explicitly specialize for NEON intrinsic
7637         vector types.
7638
7639 2021-02-03  Matthias Kretz  <kretz@kde.org>
7640
7641         * testsuite/experimental/simd/driver.sh: Implement skip, only,
7642         expensive, and xfail markers. They can select on type, ABI tag
7643         subset number, target-triplet, and compiler flags.
7644         * testsuite/experimental/simd/generate_makefile.sh: The summary
7645         now includes lines for unexpected passes and expected failures.
7646         If the skip or only markers are only conditional on the type, do
7647         not generate rules for those types.
7648         * testsuite/experimental/simd/tests/abs.cc: Mark test expensive
7649         for ABI tag subsets 1-9.
7650         * testsuite/experimental/simd/tests/algorithms.cc: Ditto.
7651         * testsuite/experimental/simd/tests/broadcast.cc: Ditto.
7652         * testsuite/experimental/simd/tests/casts.cc: Ditto.
7653         * testsuite/experimental/simd/tests/generator.cc: Ditto.
7654         * testsuite/experimental/simd/tests/integer_operators.cc: Ditto.
7655         * testsuite/experimental/simd/tests/loadstore.cc: Ditto.
7656         * testsuite/experimental/simd/tests/mask_broadcast.cc: Ditto.
7657         * testsuite/experimental/simd/tests/mask_conversions.cc: Ditto.
7658         * testsuite/experimental/simd/tests/mask_implicit_cvt.cc: Ditto.
7659         * testsuite/experimental/simd/tests/mask_loadstore.cc: Ditto.
7660         * testsuite/experimental/simd/tests/mask_operator_cvt.cc: Ditto.
7661         * testsuite/experimental/simd/tests/mask_operators.cc: Ditto.
7662         * testsuite/experimental/simd/tests/mask_reductions.cc: Ditto.
7663         * testsuite/experimental/simd/tests/operator_cvt.cc: Ditto.
7664         * testsuite/experimental/simd/tests/operators.cc: Ditto.
7665         * testsuite/experimental/simd/tests/reductions.cc: Ditto.
7666         * testsuite/experimental/simd/tests/simd.cc: Ditto.
7667         * testsuite/experimental/simd/tests/split_concat.cc: Ditto.
7668         * testsuite/experimental/simd/tests/splits.cc: Ditto.
7669         * testsuite/experimental/simd/tests/where.cc: Ditto.
7670         * testsuite/experimental/simd/tests/fpclassify.cc: Ditto. In
7671         addition replace "test only floattypes" marker by unconditional
7672         "float|double|ldouble" only marker.
7673         * testsuite/experimental/simd/tests/frexp.cc: Ditto.
7674         * testsuite/experimental/simd/tests/hypot3_fma.cc: Ditto.
7675         * testsuite/experimental/simd/tests/ldexp_scalbn_scalbln_modf.cc:
7676         Ditto.
7677         * testsuite/experimental/simd/tests/logarithm.cc: Ditto.
7678         * testsuite/experimental/simd/tests/math_1arg.cc: Ditto.
7679         * testsuite/experimental/simd/tests/math_2arg.cc: Ditto.
7680         * testsuite/experimental/simd/tests/remqo.cc: Ditto.
7681         * testsuite/experimental/simd/tests/trigonometric.cc: Ditto.
7682         * testsuite/experimental/simd/tests/trunc_ceil_floor.cc: Ditto.
7683         * testsuite/experimental/simd/tests/sincos.cc: Ditto. In
7684         addition, xfail on run because the reference data is missing.
7685
7686 2021-02-02  Jonathan Wakely  <jwakely@redhat.com>
7687
7688         * doc/xml/manual/status_cxx2011.xml: Remove stray table cell.
7689         * doc/xml/manual/status_cxx2014.xml: Likewise.
7690         * doc/xml/manual/status_cxx2017.xml: Likewise.
7691         * doc/html/manual/status.html: Regenerate.
7692
7693 2021-02-01  François Dumont  <fdumont@gcc.gnu.org>
7694
7695         PR libstdc++/70303
7696         * include/bits/stl_deque.h (std::deque<>::operator-(iterator, iterator)):
7697         Return 0 if both iterators are value-initialized.
7698         * testsuite/23_containers/deque/70303.cc: New test.
7699         * testsuite/23_containers/vector/70303.cc: New test.
7700
7701 2021-02-01  Jonathan Wakely  <jwakely@redhat.com>
7702
7703         * doc/xml/manual/status_cxx2011.xml: Update std::call_once
7704         status.
7705         * doc/xml/manual/status_cxx2014.xml: Likewise.
7706         * doc/xml/manual/status_cxx2017.xml: Likewise. Update
7707         std::from_chars and std::to_chars status. Fix formatting.
7708         * doc/html/manual/status.html: Regenerate.
7709
7710 2021-01-28  Jonathan Wakely  <jwakely@redhat.com>
7711
7712         * include/experimental/bits/numeric_traits.h: Update copyright
7713         dates.
7714         * include/experimental/bits/simd.h: Likewise.
7715         * include/experimental/bits/simd_builtin.h: Likewise.
7716         * include/experimental/bits/simd_converter.h: Likewise.
7717         * include/experimental/bits/simd_detail.h: Likewise.
7718         * include/experimental/bits/simd_fixed_size.h: Likewise.
7719         * include/experimental/bits/simd_math.h: Likewise.
7720         * include/experimental/bits/simd_neon.h: Likewise.
7721         * include/experimental/bits/simd_ppc.h: Likewise.
7722         * include/experimental/bits/simd_scalar.h: Likewise.
7723         * include/experimental/bits/simd_x86.h: Likewise.
7724         * include/experimental/bits/simd_x86_conversions.h: Likewise.
7725         * include/experimental/simd: Likewise.
7726         * testsuite/experimental/simd/*: Likewise.
7727
7728 2021-01-27  Jonathan Wakely  <jwakely@redhat.com>
7729
7730         * doc/xml/manual/status_cxx2017.xml: Replace invalid entity.
7731         * doc/html/*: Regenerate.
7732
7733 2021-01-27  Jonathan Wakely  <jwakely@redhat.com>
7734
7735         * testsuite/experimental/simd/generate_makefile.sh: Use printf
7736         instead of echo when printing escape characters.
7737
7738 2021-01-27  Matthias Kretz  <kretz@kde.org>
7739
7740         * scripts/check_simd: New file. This script is called from the
7741         the check-simd target. It determines a set of compiler flags and
7742         simulator setups for calling generate_makefile.sh and passes the
7743         information back to the check-simd target, which recurses to the
7744         generated Makefiles.
7745         * scripts/create_testsuite_files: Remove files below simd/tests/
7746         from testsuite_files and place them in testsuite_files_simd.
7747         * testsuite/Makefile.am: Add testsuite_files_simd. Add
7748         check-simd target.
7749         * testsuite/Makefile.in: Regenerate.
7750         * testsuite/experimental/simd/driver.sh: New file. This script
7751         compiles and runs a given simd test, logging its output and
7752         status. It uses the timeout command to implement compile and
7753         test timeouts.
7754         * testsuite/experimental/simd/generate_makefile.sh: New file.
7755         This script generates a Makefile which uses driver.sh to compile
7756         and run the tests and collect the logs into a single log file.
7757         * testsuite/experimental/simd/tests/abs.cc: New file. Tests
7758         abs(simd).
7759         * testsuite/experimental/simd/tests/algorithms.cc: New file.
7760         Tests min/max(simd, simd).
7761         * testsuite/experimental/simd/tests/bits/conversions.h: New
7762         file. Contains functions to support tests involving conversions.
7763         * testsuite/experimental/simd/tests/bits/make_vec.h: New file.
7764         Support functions make_mask and make_vec.
7765         * testsuite/experimental/simd/tests/bits/mathreference.h: New
7766         file. Support functions to supply precomputed math function
7767         reference data.
7768         * testsuite/experimental/simd/tests/bits/metahelpers.h: New
7769         file. Support code for SFINAE testing.
7770         * testsuite/experimental/simd/tests/bits/simd_view.h: New file.
7771         * testsuite/experimental/simd/tests/bits/test_values.h: New
7772         file. Test functions to easily drive a test with simd objects
7773         initialized from a given list of values and a range of random
7774         values.
7775         * testsuite/experimental/simd/tests/bits/ulp.h: New file.
7776         Support code to determine the ULP distance of simd objects.
7777         * testsuite/experimental/simd/tests/bits/verify.h: New file.
7778         Test framework for COMPARE'ing simd objects and instantiating
7779         the test templates with value_type and ABI tag.
7780         * testsuite/experimental/simd/tests/broadcast.cc: New file. Test
7781         simd broadcasts.
7782         * testsuite/experimental/simd/tests/casts.cc: New file. Test
7783         simd casts.
7784         * testsuite/experimental/simd/tests/fpclassify.cc: New file.
7785         Test floating-point classification functions.
7786         * testsuite/experimental/simd/tests/frexp.cc: New file. Test
7787         frexp(simd).
7788         * testsuite/experimental/simd/tests/generator.cc: New file. Test
7789         simd generator constructor.
7790         * testsuite/experimental/simd/tests/hypot3_fma.cc: New file.
7791         Test 3-arg hypot(simd,simd,simd) and fma(simd,simd,sim).
7792         * testsuite/experimental/simd/tests/integer_operators.cc: New
7793         file. Test integer operators.
7794         * testsuite/experimental/simd/tests/ldexp_scalbn_scalbln_modf.cc:
7795         New file. Test ldexp(simd), scalbn(simd), scalbln(simd), and
7796         modf(simd).
7797         * testsuite/experimental/simd/tests/loadstore.cc: New file. Test
7798         (converting) simd loads and stores.
7799         * testsuite/experimental/simd/tests/logarithm.cc: New file. Test
7800         log*(simd).
7801         * testsuite/experimental/simd/tests/mask_broadcast.cc: New file.
7802         Test simd_mask broadcasts.
7803         * testsuite/experimental/simd/tests/mask_conversions.cc: New
7804         file. Test simd_mask conversions.
7805         * testsuite/experimental/simd/tests/mask_implicit_cvt.cc: New
7806         file. Test simd_mask implicit conversions.
7807         * testsuite/experimental/simd/tests/mask_loadstore.cc: New file.
7808         Test simd_mask loads and stores.
7809         * testsuite/experimental/simd/tests/mask_operator_cvt.cc: New
7810         file. Test simd_mask operators convert as specified.
7811         * testsuite/experimental/simd/tests/mask_operators.cc: New file.
7812         Test simd_mask compares, subscripts, and negation.
7813         * testsuite/experimental/simd/tests/mask_reductions.cc: New
7814         file. Test simd_mask reductions.
7815         * testsuite/experimental/simd/tests/math_1arg.cc: New file. Test
7816         1-arg math functions on simd.
7817         * testsuite/experimental/simd/tests/math_2arg.cc: New file. Test
7818         2-arg math functions on simd.
7819         * testsuite/experimental/simd/tests/operator_cvt.cc: New file.
7820         Test implicit conversions on simd binary operators behave as
7821         specified.
7822         * testsuite/experimental/simd/tests/operators.cc: New file. Test
7823         simd compares, subscripts, not, unary minus, plus, minus,
7824         multiplies, divides, increment, and decrement.
7825         * testsuite/experimental/simd/tests/reductions.cc: New file.
7826         Test reduce(simd).
7827         * testsuite/experimental/simd/tests/remqo.cc: New file. Test
7828         remqo(simd).
7829         * testsuite/experimental/simd/tests/simd.cc: New file. Basic
7830         sanity checks of simd types.
7831         * testsuite/experimental/simd/tests/sincos.cc: New file. Test
7832         sin(simd) and cos(simd).
7833         * testsuite/experimental/simd/tests/split_concat.cc: New file.
7834         Test split(simd) and concat(simd, simd).
7835         * testsuite/experimental/simd/tests/splits.cc: New file. Test
7836         split(simd_mask).
7837         * testsuite/experimental/simd/tests/trigonometric.cc: New file.
7838         Test remaining trigonometric functions on simd.
7839         * testsuite/experimental/simd/tests/trunc_ceil_floor.cc: New
7840         file. Test trunc(simd), ceil(simd), and floor(simd).
7841         * testsuite/experimental/simd/tests/where.cc: New file. Test
7842         masked operations using where.
7843
7844 2021-01-27  Matthias Kretz  <kretz@kde.org>
7845
7846         * doc/xml/manual/status_cxx2017.xml: Add implementation status
7847         of the Parallelism TS 2. Document implementation-defined types
7848         and behavior.
7849         * include/Makefile.am: Add new headers.
7850         * include/Makefile.in: Regenerate.
7851         * include/experimental/simd: New file. New header for
7852         Parallelism TS 2.
7853         * include/experimental/bits/numeric_traits.h: New file.
7854         Implementation of P1841R1 using internal naming. Addition of
7855         missing IEC559 functionality query.
7856         * include/experimental/bits/simd.h: New file. Definition of the
7857         public simd interfaces and general implementation helpers.
7858         * include/experimental/bits/simd_builtin.h: New file.
7859         Implementation of the _VecBuiltin simd_abi.
7860         * include/experimental/bits/simd_converter.h: New file. Generic
7861         simd conversions.
7862         * include/experimental/bits/simd_detail.h: New file. Internal
7863         macros for the simd implementation.
7864         * include/experimental/bits/simd_fixed_size.h: New file. Simd
7865         fixed_size ABI specific implementations.
7866         * include/experimental/bits/simd_math.h: New file. Math
7867         overloads for simd.
7868         * include/experimental/bits/simd_neon.h: New file. Simd NEON
7869         specific implementations.
7870         * include/experimental/bits/simd_ppc.h: New file. Implement bit
7871         shifts to avoid invalid results for integral types smaller than
7872         int.
7873         * include/experimental/bits/simd_scalar.h: New file. Simd scalar
7874         ABI specific implementations.
7875         * include/experimental/bits/simd_x86.h: New file. Simd x86
7876         specific implementations.
7877         * include/experimental/bits/simd_x86_conversions.h: New file.
7878         x86 specific conversion optimizations. The conversion patterns
7879         work around missing conversion patterns in the compiler and
7880         should be removed as soon as PR85048 is resolved.
7881         * testsuite/experimental/simd/standard_abi_usable.cc: New file.
7882         Test that all (not all fixed_size<N>, though) standard simd and
7883         simd_mask types are usable.
7884         * testsuite/experimental/simd/standard_abi_usable_2.cc: New
7885         file. As above but with -ffast-math.
7886         * testsuite/libstdc++-dg/conformance.exp: Don't build simd tests
7887         from the standard test loop. Instead use
7888         check_vect_support_and_set_flags to build simd tests with the
7889         relevant machine flags.
7890
7891 2021-01-27  Jonathan Wakely  <jwakely@redhat.com>
7892
7893         PR libstdc++/66414
7894         * include/bits/string_view.tcc
7895         (basic_string_view::find(const CharT*, size_type, size_type)):
7896         Optimize.
7897
7898 2021-01-27  Paul Fee  <paul.f.fee@gmail.com>
7899
7900         * include/bits/basic_string.h (basic_string::contains): New
7901         member functions.
7902         * include/std/string_view (basic_string_view::contains):
7903         Likewise.
7904         * include/std/version (__cpp_lib_string_contains): Define.
7905         * testsuite/21_strings/basic_string/operations/starts_with/char/1.cc:
7906         Remove trailing whitespace.
7907         * testsuite/21_strings/basic_string/operations/starts_with/wchar_t/1.cc:
7908         Likewise.
7909         * testsuite/21_strings/basic_string/operations/contains/char/1.cc: New test.
7910         * testsuite/21_strings/basic_string/operations/contains/wchar_t/1.cc: New test.
7911         * testsuite/21_strings/basic_string_view/operations/contains/char/1.cc: New test.
7912         * testsuite/21_strings/basic_string_view/operations/contains/char/2.cc: New test.
7913         * testsuite/21_strings/basic_string_view/operations/contains/wchar_t/1.cc: New test.
7914
7915 2021-01-21  Jonathan Wakely  <jwakely@redhat.com>
7916
7917         * src/c++17/Makefile.in: Regenerate.
7918
7919 2021-01-20  David Edelsohn  <dje.gcc@gmail.com>
7920
7921         * config/os/aix/ctype_inline.h (bool ctype<char>:: is): Cast
7922         _OBJ_DATA subscript to unsigned char. Add _THREAD_SAFE access to
7923         __lc_type.
7924         (const char* ctype<char>:: is): Same.
7925
7926 2021-01-18  Jonathan Wakely  <jwakely@redhat.com>
7927
7928         PR libstdc++/98725
7929         * testsuite/20_util/unique_ptr/io/lwg2948.cc:  Do not try to
7930         write to a wide character stream if wide character support is
7931         disabled in the library.
7932
7933 2021-01-18  Jonathan Wakely  <jwakely@redhat.com>
7934
7935         * testsuite/27_io/basic_stringstream/cons/char/1.cc: Use
7936         stringbuf not wstringbuf.
7937
7938 2021-01-18  Jakub Jelinek  <jakub@redhat.com>
7939
7940         PR debug/98708
7941         * src/c++11/Makefile.am (cxx11-ios_failure-lt.s, cxx11-ios_failure.s):
7942         Compile with -gno-as-loc-support.
7943         * src/c++11/Makefile.in: Regenerated.
7944
7945 2021-01-16  H.J. Lu  <hjl.tools@gmail.com>
7946
7947         * testsuite/29_atomics/atomic_flag/test_and_set/explicit-hle.cc:
7948         Add -fcf-protection=none to -march=i486.
7949
7950 2021-01-14  François Dumont  <fdumont@gcc.gnu.org>
7951
7952         * testsuite/23_containers/deque/debug/98466.cc: Make it pre-C++11
7953         compliant.
7954
7955 2021-01-14  Alexandre Oliva  <oliva@adacore.com>
7956
7957         * testsuite/30_threads/future/members/poll.cc: Calibrate
7958         iteration count.
7959
7960 2021-01-14  François Dumont  <fdumont@gcc.gnu.org>
7961
7962         PR libstdc++/98466
7963         * include/bits/hashtable_policy.h (_Node_iterator_base()): Set _M_cur to nullptr.
7964         (_Node_iterator()): Make default.
7965         (_Node_const_iterator()): Make default.
7966         * include/debug/macros.h (__glibcxx_check_erae_range_after): Add _M_singular
7967         iterator checks.
7968         * include/debug/safe_iterator.h
7969         (_GLIBCXX_DEBUG_VERIFY_OPERANDS): Accept if both iterator are value initialized.
7970         * include/debug/safe_local_iterator.h (_GLIBCXX_DEBUG_VERIFY_OPERANDS):
7971         Likewise.
7972         * include/debug/safe_iterator.tcc (_Safe_iterator<>::_M_valid_range): Add
7973         _M_singular checks on input iterators.
7974         * src/c++11/debug.cc (_Safe_iterator_base::_M_can_compare): Remove _M_singular
7975         checks.
7976         * testsuite/23_containers/deque/debug/98466.cc: New test.
7977         * testsuite/23_containers/unordered_map/debug/98466.cc: New test.
7978
7979 2021-01-14  Jonathan Wakely  <jwakely@redhat.com>
7980
7981         PR libstdc++/98471
7982         * include/bits/fs_path.h (__throw_conversion_error): New
7983         function to throw or abort on character conversion errors.
7984         (__wstr_from_utf8): Move definition after filesystem_error has
7985         been defined. Use __throw_conversion_error.
7986         (path::_S_convert<_EcharT>): Use __throw_conversion_error.
7987         (path::_S_str_convert<_CharT, _Traits, _Allocator>): Likewise.
7988         (path::u8string): Likewise.
7989
7990 2021-01-14  Jonathan Wakely  <jwakely@redhat.com>
7991
7992         * include/std/barrier: Update copyright years. Fix whitespace.
7993         * include/std/version: Fix whitespace.
7994         * testsuite/30_threads/barrier/1.cc: Update copyright years.
7995         * testsuite/30_threads/barrier/2.cc: Likewise.
7996         * testsuite/30_threads/barrier/arrive.cc: Likewise.
7997         * testsuite/30_threads/barrier/arrive_and_drop.cc: Likewise.
7998         * testsuite/30_threads/barrier/arrive_and_wait.cc: Likewise.
7999         * testsuite/30_threads/barrier/completion.cc: Likewise.
8000
8001 2021-01-13  Jonathan Wakely  <jwakely@redhat.com>
8002
8003         * doc/doxygen/user.cfg.in (INPUT): Remove include/debug/array.
8004
8005 2021-01-10  David Edelsohn  <dje.gcc@gmail.com>
8006
8007         PR libstdc++/98613
8008         * testsuite/ext/vstring/cons/moveable.cc: Suppress false positive
8009         warning.
8010         * testsuite/ext/vstring/modifiers/assign/move_assign.cc: Same.
8011
8012 2021-01-08  Olivier Hainque  <hainque@adacore.com>
8013
8014         * testsuite/20_util/bind/ref_neg.cc: Tweak the
8015         dg-prune-output regex for out-of-build-tree contexts.
8016
8017 2021-01-07  Thomas Rodgers  <trodgers@redhat.com>
8018
8019         * doc/doxygen/user.cfg.in: Add new header.
8020         * include/Makefile.am (std_headers): likewise.
8021         * include/Makefile.in: Regenerate.
8022         * include/precompiled/stdc++.h: Add new header.
8023         * include/std/barrier: New file.
8024         * include/std/version: Add __cpp_lib_barrier feature test macro.
8025         * testsuite/30_threads/barrier/1.cc: New test.
8026         * testsuite/30_threads/barrier/2.cc: Likewise.
8027         * testsuite/30_threads/barrier/arrive_and_drop.cc: Likewise.
8028         * testsuite/30_threads/barrier/arrive_and_wait.cc: Likewise.
8029         * testsuite/30_threads/barrier/arrive.cc: Likewise.
8030         * testsuite/30_threads/barrier/completion.cc: Likewise.
8031
8032 2021-01-07  Patrick Palka  <ppalka@redhat.com>
8033
8034         PR libstdc++/98384
8035         * testsuite/20_util/to_chars/long_double.cc: Use nexttowardl
8036         instead of the non-standard nextupl and nextdownl.
8037
8038 2021-01-05  Samuel Thibault  <samuel.thibault@ens-lyon.org>
8039
8040         * configure: Re-generate.
8041
8042 2021-01-05  Ed Smith-Rowland  <3dw4rd@verizon.net>
8043
8044         * include/precompiled/stdc++.h: Add <source_location> to C++20 section.
8045
8046 2021-01-01  Jakub Jelinek  <jakub@redhat.com>
8047
8048         * ChangeLog-2020: Rotate ChangeLog.  New file.
8049
8050 \f
8051 Copyright (C) 2021 Free Software Foundation, Inc.
8052
8053 Copying and distribution of this file, with or without modification,
8054 are permitted in any medium without royalty provided the copyright
8055 notice and this notice are preserved.