libstdc++-v3/ChangeLog

   1 2021-11-30  Jonathan Wakely  <jwakely@redhat.com>
   2
   3         * testsuite/21_strings/basic_string/cons/char/moveable.cc: Allow
   4         moved-from string to be non-empty.
   5         * testsuite/21_strings/basic_string/cons/char/moveable2.cc:
   6         Likewise.
   7         * testsuite/21_strings/basic_string/cons/char/moveable2_c++17.cc:
   8         Likewise.
   9         * testsuite/21_strings/basic_string/cons/wchar_t/moveable.cc:
  10         Likewise.
  11         * testsuite/21_strings/basic_string/cons/wchar_t/moveable2.cc:
  12         Likewise.
  13         * testsuite/21_strings/basic_string/cons/wchar_t/moveable2_c++17.cc:
  14         Likewise.
  15         * testsuite/21_strings/basic_string/modifiers/assign/char/87749.cc:
  16         Construct empty string before setting oom flag.
  17         * testsuite/21_strings/basic_string/modifiers/assign/wchar_t/87749.cc:
  18         Likewise.
  19
  20 2021-11-30  Jonathan Wakely  <jwakely@redhat.com>
  21
  22         * include/bits/cow_string.h (basic_string(basic_string&&)): Fix
  23         mem-initializer for _GLIBCXX_FULLY_DYNAMIC_STRING==0 case.
  24         * testsuite/21_strings/basic_string/cons/char/noexcept_move_construct.cc:
  25         Remove outdated comment.
  26         * testsuite/21_strings/basic_string/cons/wchar_t/noexcept_move_construct.cc:
  27         Likewise.
  28
  29 2021-11-30  Jonathan Wakely  <jwakely@redhat.com>
  30
  31         * src/c++20/sstream-inst.cc (_GLIBCXX_USE_CXX11_ABI): Define to
  32         select new ABI.
  33
  34 2021-11-30  Jonathan Wakely  <jwakely@redhat.com>
  35
  36         * include/bits/stl_vector.h (vector::_S_do_relocate): Remove
  37         C++20 constexpr specifier.
  38         (vector::_S_relocate) [__cpp_if_constexpr]: Call __relocate_a
  39         directly without tag dispatching.
  40
  41 2021-11-30  Jonathan Wakely  <jwakely@redhat.com>
  42
  43         PR libstdc++/103453
  44         * config/allocator/malloc_allocator_base.h
  45         (_GLIBCXX_SANITIZE_STD_ALLOCATOR): Define for Clang.
  46         * config/allocator/new_allocator_base.h
  47         (_GLIBCXX_SANITIZE_STD_ALLOCATOR): Likewise.
  48
  49 2021-11-30  Jonathan Wakely  <jwakely@redhat.com>
  50
  51         * doc/xml/manual/debug_mode.xml: Replace "his or her" with "they".
  52         * doc/html/manual/debug_mode_design.html: Regenerate.
  53
  54 2021-11-30  Jakub Jelinek  <jakub@redhat.com>
  55
  56         * include/std/bit (byteswap): Add [[nodiscard]].
  57
  58 2021-11-28  Jakub Jelinek  <jakub@redhat.com>
  59
  60         * include/std/bit (__cpp_lib_byteswap, byteswap): Define.
  61         * include/std/version (__cpp_lib_byteswap): Define.
  62         * testsuite/26_numerics/bit/bit.byteswap/byteswap.cc: New test.
  63         * testsuite/26_numerics/bit/bit.byteswap/version.cc: New test.
  64
  65 2021-11-26  Jonathan Wakely  <jwakely@redhat.com>
  66
  67         * testsuite/24_iterators/move_iterator/dr3265.cc: Fix test to
  68         account for LWG 3435 resolution.
  69
  70 2021-11-26  Jonathan Wakely  <jwakely@redhat.com>
  71
  72         * include/bits/stl_uninitialized.h (__relocate_a_1): Do not use
  73         memmove during constant evaluation.
  74         * include/bits/stl_vector.h (vector::_S_use_relocate()): Do not
  75         check is_constant_evaluated in always-constexpr function.
  76
  77 2021-11-26  Jonathan Wakely  <jwakely@redhat.com>
  78
  79         PR libstdc++/96592
  80         * include/std/tuple (tuple::is_constructible): Remove.
  81
  82 2021-11-26  Jonathan Wakely  <jwakely@redhat.com>
  83
  84         * testsuite/29_atomics/atomic_float/1.cc: Reorder directives.
  85
  86 2021-11-26  Jonathan Wakely  <jwakely@redhat.com>
  87
  88         * testsuite/23_containers/unordered_map/modifiers/move_assign.cc:
  89         Change dg-do compile to run.
  90         * testsuite/27_io/basic_istream/extractors_character/wchar_t/lwg2499.cc:
  91         Likewise.
  92
  93 2021-11-26  Jonathan Wakely  <jwakely@redhat.com>
  94
  95         * testsuite/21_strings/basic_string_view/element_access/char/back_constexpr_neg.cc:
  96         Remove xfail selector.
  97         * testsuite/21_strings/basic_string_view/element_access/char/constexpr_neg.cc:
  98         Likewise.
  99         Likewise.
 100         * testsuite/21_strings/basic_string_view/element_access/char/front_constexpr_neg.cc:
 101         Likewise.
 102         * testsuite/21_strings/basic_string_view/element_access/wchar_t/back_constexpr_neg.cc:
 103         Likewise.
 104         * testsuite/21_strings/basic_string_view/element_access/wchar_t/constexpr_neg.cc:
 105         Likewise.
 106         * testsuite/21_strings/basic_string_view/element_access/wchar_t/front_constexpr_neg.cc:
 107         Likewise.
 108         * testsuite/23_containers/span/101411.cc: Likewise.
 109         * testsuite/25_algorithms/copy/debug/constexpr_neg.cc: Likewise.
 110         * testsuite/25_algorithms/copy_backward/debug/constexpr_neg.cc:
 111         Likewise.
 112         * testsuite/25_algorithms/equal/constexpr_neg.cc: Likewise.
 113         * testsuite/25_algorithms/equal/debug/constexpr_neg.cc: Likewise.
 114         * testsuite/25_algorithms/lower_bound/debug/constexpr_partitioned_neg.cc:
 115         Likewise.
 116         * testsuite/25_algorithms/lower_bound/debug/constexpr_partitioned_pred_neg.cc:
 117         Likewise.
 118         * testsuite/25_algorithms/lower_bound/debug/constexpr_valid_range_neg.cc:
 119         Likewise.
 120         * testsuite/25_algorithms/upper_bound/debug/constexpr_partitioned_neg.cc:
 121         Likewise.
 122         * testsuite/25_algorithms/upper_bound/debug/constexpr_partitioned_pred_neg.cc:
 123         Likewise.
 124         * testsuite/25_algorithms/upper_bound/debug/constexpr_valid_range_neg.cc:
 125         Likewise.
 126
 127 2021-11-26  Jonathan Wakely  <jwakely@redhat.com>
 128
 129         * testsuite/20_util/pointer_traits/lwg3545.cc: Move to_address
 130         tests to ...
 131         * testsuite/20_util/to_address/lwg3545.cc: ... here. Add -std
 132         option before checking effective target.
 133
 134 2021-11-25  Jonathan Wakely  <jwakely@redhat.com>
 135
 136         * testsuite/20_util/tuple/comparison_operators/overloaded2.cc:
 137         Remove dg-error for C++11_only error.
 138
 139 2021-11-25  Jonathan Wakely  <jwakely@redhat.com>
 140
 141         PR libstdc++/96416
 142         * include/bits/ptr_traits.h (pointer_traits): Reimplement to be
 143         SFINAE-friendly (LWG 3545).
 144         * testsuite/20_util/pointer_traits/lwg3545.cc: New test.
 145         * testsuite/20_util/to_address/1_neg.cc: Adjust dg-error line.
 146         * testsuite/20_util/to_address/lwg3545.cc: New test.
 147
 148 2021-11-25  Jonathan Wakely  <jwakely@redhat.com>
 149
 150         PR libstdc++/101608
 151         * include/bits/ranges_algobase.h (__fill_n_fn): Check for
 152         constant evaluation before using memset.
 153         * testsuite/25_algorithms/fill_n/constrained.cc: Check
 154         byte-sized values as well.
 155
 156 2021-11-24  Jonathan Wakely  <jwakely@redhat.com>
 157
 158         * testsuite/libstdc++-prettyprinters/80276.cc: Add xfail for
 159         debug mode.
 160         * testsuite/libstdc++-prettyprinters/libfundts.cc: Likewise.
 161
 162 2021-11-24  Jonathan Wakely  <jwakely@redhat.com>
 163
 164         * testsuite/lib/libstdc++.exp: Rename effective target keywords
 165         to avoid dashes in the name.
 166         * testsuite/*: Update effective targe keywords.
 167
 168 2021-11-23  Jonathan Wakely  <jwakely@redhat.com>
 169
 170         PR libstdc++/103086
 171         * testsuite/libstdc++-prettyprinters/cxx11.cc: Check unique_ptr
 172         with non-empty pointer and non-empty deleter.
 173
 174 2021-11-23  Jonathan Wakely  <jwakely@redhat.com>
 175
 176         * testsuite/18_support/50594.cc: Check effective target.
 177         * testsuite/20_util/allocator/1.cc: Likewise.
 178         * testsuite/20_util/allocator/overaligned.cc: Likewise.
 179         * testsuite/23_containers/unordered_map/96088.cc: Likewise.
 180         * testsuite/23_containers/unordered_multimap/96088.cc: Likewise.
 181         * testsuite/23_containers/unordered_multiset/96088.cc: Likewise.
 182         * testsuite/23_containers/unordered_set/96088.cc: Likewise.
 183         * testsuite/ext/throw_allocator/check_delete.cc: Likewise.
 184         * testsuite/ext/throw_allocator/check_new.cc: Likewise.
 185         * testsuite/lib/libstdc++.exp (check_effective_target_std_allocator_new):
 186         Define new proc.
 187
 188 2021-11-23  Jonathan Wakely  <jwakely@redhat.com>
 189
 190         PR libstdc++/103381
 191         * include/ext/bitmap_allocator.h: Include <bits/stl_function.h>
 192         instead of <functional>.
 193
 194 2021-11-22  Jonathan Wakely  <jwakely@redhat.com>
 195
 196         * include/bits/c++config (_GLIBCXX14_DEPRECATED): Fix condition
 197         checking for C++14.
 198
 199 2021-11-20  François Dumont  <fdumont@gcc.gnu.org>
 200
 201         * include/bits/erase_if.h (__erase_nodes_if): Add _UnsafeContainer template
 202         parameter. Use it to get iterators to work with.
 203         * include/debug/macros.h (__glibcxx_check_erase2): New.
 204         * include/debug/map.h (map<>::erase(_Base_const_iterator)): New.
 205         (map<>::erase(const_iterator)): Use latter.
 206         * include/debug/multimap.h (multimap<>::erase(_Base_const_iterator)): New.
 207         (multimap<>::erase(const_iterator)): Use latter.
 208         * include/debug/multiset.h (multiset<>::erase(_Base_const_iterator)): New.
 209         (multiset<>::erase(const_iterator)): Use latter.
 210         * include/debug/set.h (set<>::erase(_Base_const_iterator)): New.
 211         (set<>::erase(const_iterator)): Use latter.
 212         * include/debug/unordered_map (unordered_map<>::erase(_Base_const_iterator)): New.
 213         (unordered_multimap<>::erase(const_iterator)): New.
 214         * include/debug/unordered_set (unordered_set<>::erase(_Base_const_iterator)): New.
 215         (unordered_multiset<>::erase(const_iterator)): New.
 216         * include/experimental/map (erase_if): Adapt.
 217         * include/experimental/set (erase_if): Adapt.
 218         * include/experimental/unordered_map (erase_if): Adapt.
 219         * include/experimental/unordered_set (erase_if): Adapt.
 220         * include/std/map (erase_if): Adapt.
 221         * include/std/set (erase_if): Adapt.
 222         * include/std/unordered_map (erase_if): Adapt.
 223         * include/std/unordered_set (erase_if): Adapt.
 224
 225 2021-11-19  Jonathan Wakely  <jwakely@redhat.com>
 226
 227         * testsuite/27_io/basic_istringstream/cons/char/1.cc: Check all
 228         constructors.
 229         * testsuite/27_io/basic_istringstream/cons/wchar_t/1.cc:
 230         Likewise.
 231         * testsuite/27_io/basic_ostringstream/cons/char/1.cc: Likewise.
 232         * testsuite/27_io/basic_ostringstream/cons/wchar_t/1.cc:
 233         Likewise.
 234         * testsuite/27_io/basic_stringstream/cons/char/1.cc: Likewise.
 235         * testsuite/27_io/basic_stringstream/cons/wchar_t/1.cc:
 236         Likewise.
 237
 238 2021-11-19  Jonathan Wakely  <jwakely@redhat.com>
 239
 240         * src/c++98/locale_init.cc (_S_initialize_once): Check if
 241         initialization has already been done.
 242         (_S_initialize): Replace __gthread_active_p with
 243         __is_single_threaded. Use __builtin_expect.
 244
 245 2021-11-19  Jonathan Wakely  <jwakely@redhat.com>
 246
 247         PR libstdc++/103295
 248         * include/bits/basic_string.tcc (_M_construct): Use the
 249         traits assign member to write into allcoated memory.
 250
 251 2021-11-19  Iain Sandoe  <iain@sandoe.co.uk>
 252
 253         * testsuite/lib/prune.exp: Prune dsymutil (ld64) warning.
 254
 255 2021-11-19  Jonathan Wakely  <jwakely@redhat.com>
 256
 257         PR libstdc++/103332
 258         PR libstdc++/102958
 259         * testsuite/21_strings/basic_string/capacity/char/1.cc: Add
 260         -Wno-stringop-overflow.
 261         * testsuite/21_strings/basic_string/operators/char/1.cc:
 262         Likewise.
 263         * testsuite/experimental/filesystem/path/factory/u8path-char8_t.cc:
 264         Add -Wno-stringop-overread.
 265
 266 2021-11-19  Jonathan Wakely  <jwakely@redhat.com>
 267
 268         PR libstdc++/103295
 269         * include/bits/basic_string.h (_Alloc_traits): Replace typedef
 270         with struct for C++20 mode.
 271         * include/bits/basic_string.tcc (_M_replace): Use _Alloc_traits
 272         for allocation.
 273         * include/bits/char_traits.h (__gnu_cxx::char_traits::assign):
 274         Use std::_Construct during constant evaluation.
 275         (__gnu_cxx::char_traits::assign(CharT*, const CharT*, size_t)):
 276         Likewise. Replace std::fill_n with memset or manual loop.
 277         (__gnu_cxx::char_traits::copy): Likewise, replacing std::copy
 278         with memcpy.
 279         * include/ext/vstring.h: Include <bits/stl_algobase.h> for
 280         std::min.
 281         * include/std/string_view: Likewise.
 282         * testsuite/21_strings/basic_string/capacity/char/resize_and_overwrite.cc:
 283         Add constexpr test.
 284
 285 2021-11-19  Tamar Christina  <tamar.christina@arm.com>
 286
 287         PR libstdc++/103305
 288         * config/os/newlib/ctype_base.h (upper, lower, alpha, digit, xdigit,
 289         space, print, graph, cntrl, punct, alnum, blank): Use short or long
 290         names depending on if short ones are defined.
 291
 292 2021-11-18  Jonathan Wakely  <jwakely@redhat.com>
 293
 294         * include/bits/char_traits.h (__gnu_cxx::char_traits::move):
 295         Do not compare unrelated pointers during constant evaluation.
 296         * testsuite/21_strings/char_traits/requirements/constexpr_functions_c++20.cc:
 297         Improve tests for char_traits::move.
 298
 299 2021-11-18  Jonathan Wakely  <jwakely@redhat.com>
 300
 301         * acinclude.m4: Replace AC_CACHE_VAL with AC_CACHE_CHECK.
 302         * configure: Regenerate.
 303
 304 2021-11-17  Jonathan Wakely  <jwakely@redhat.com>
 305
 306         * include/experimental/internet (address): Use std::_Construct
 307         to initialize union members.
 308
 309 2021-11-17  Jonathan Wakely  <jwakely@redhat.com>
 310
 311         * include/bits/basic_string.h (_M_construct_aux): Only define
 312         for C++98. Remove constexpr.
 313         (_M_construct_aux_2): Likewise.
 314         (_M_construct(InputIter, InputIter)): Remove.
 315         (basic_string(const basic_string&)): Call _M_construct with
 316         iterator category argument.
 317         (basic_string(const basic_string&, size_type, const Alloc&)):
 318         Likewise.
 319         (basic_string(const basic_string&, size_type, size_type)):
 320         Likewise.
 321         (basic_string(const charT*, size_type, const Alloc&)): Likewise.
 322         Check for null pointer.
 323         (basic_string(const charT*, const Alloc&)): Likewise.
 324         (basic_string(initializer_list<charT>, const Alloc&)): Call
 325         _M_construct with iterator category argument.
 326         (basic_string(const basic_string&, const Alloc&)): Likewise.
 327         (basic_string(basic_string&&, const Alloc&)): Likewise.
 328         (basic_string(_InputIter, _InputIter, const Alloc&)): Likewise
 329         for C++11 and later, call _M_construct_aux for C++98.
 330         * include/bits/basic_string.tcc
 331         (_M_construct(I, I, input_iterator_tag)): Replace try-block with
 332         RAII type.
 333         (_M_construct(I, I, forward_iterator_tag)): Likewise. Remove
 334         __is_null_pointer check.
 335
 336 2021-11-17  Jonathan Wakely  <jwakely@redhat.com>
 337
 338         PR libstdc++/103295
 339         * include/bits/basic_string.h (_M_use_local_data()): New
 340         member function to make local buffer the active member.
 341         (assign(const basic_string&)): Use it.
 342         * include/bits/basic_string.tcc (_M_construct, reserve()):
 343         Likewise.
 344
 345 2021-11-17  Jonathan Wakely  <jwakely@redhat.com>
 346
 347         PR libstdc++/103240
 348         * libsupc++/tinfo2.cc (type_info::before): Use unadjusted name
 349         to check for the '*' prefix.
 350         * testsuite/util/testsuite_shared.cc: Add type_info object for
 351         use in new test.
 352         * testsuite/18_support/type_info/103240.cc: New test.
 353
 354 2021-11-16  Jonathan Wakely  <jwakely@redhat.com>
 355
 356         * include/bits/basic_string.h (operator<=>): Use constexpr
 357         unconditionally.
 358         * testsuite/21_strings/basic_string/modifiers/constexpr.cc:
 359         Require cxx11-abit effective target.
 360         * testsuite/21_strings/headers/string/synopsis.cc: Add
 361         conditional constexpr to declarations, and adjust relational
 362         operators for C++20.
 363
 364 2021-11-16  Patrick Palka  <ppalka@redhat.com>
 365
 366         * src/c++17/ryu/MERGE: Update the commit hash.
 367         * src/c++17/ryu/d2s_intrinsics.h: Merge from Ryu's master
 368         branch.
 369
 370 2021-11-16  Jonathan Wakely  <jwakely@redhat.com>
 371
 372         * include/bits/basic_string.h (basic_string, operator""s): Add
 373         constexpr for C++20.
 374         (basic_string::basic_string(basic_string&&)): Only copy
 375         initialized portion of the buffer.
 376         (basic_string::basic_string(basic_string&&, const Alloc&)):
 377         Likewise.
 378         * include/bits/basic_string.tcc (basic_string): Add constexpr
 379         for C++20.
 380         (basic_string::swap(basic_string&)): Only copy initialized
 381         portions of the buffers.
 382         (basic_string::_M_replace): Add constexpr implementation that
 383         doesn't depend on pointer comparisons.
 384         * include/bits/cow_string.h: Adjust comment.
 385         * include/ext/type_traits.h (__is_null_pointer): Add constexpr.
 386         * include/std/string (erase, erase_if): Add constexpr.
 387         * include/std/version (__cpp_lib_constexpr_string): Update
 388         value.
 389         * testsuite/21_strings/basic_string/cons/char/constexpr.cc:
 390         New test.
 391         * testsuite/21_strings/basic_string/cons/wchar_t/constexpr.cc:
 392         New test.
 393         * testsuite/21_strings/basic_string/literals/constexpr.cc:
 394         New test.
 395         * testsuite/21_strings/basic_string/modifiers/constexpr.cc: New test.
 396         * testsuite/21_strings/basic_string/modifiers/swap/char/constexpr.cc:
 397         New test.
 398         * testsuite/21_strings/basic_string/modifiers/swap/wchar_t/constexpr.cc:
 399         New test.
 400         * testsuite/21_strings/basic_string/version.cc: New test.
 401
 402 2021-11-16  Jonathan Wakely  <jwakely@redhat.com>
 403
 404         * include/bits/stl_bvector.h (swap(_Bit_reference, _Bit_reference))
 405         (swap(_Bit_reference, bool&), swap(bool&, _Bit_reference)):
 406         Define as hidden friends of _Bit_reference.
 407
 408 2021-11-16  Jonathan Wakely  <jwakely@redhat.com>
 409
 410         * testsuite/21_strings/basic_string/modifiers/append/wchar_t/1.cc:
 411         Fix reads past the end of strings.
 412         * testsuite/21_strings/basic_string/operations/compare/wchar_t/1.cc:
 413         Likewise.
 414         * testsuite/experimental/string_view/operations/compare/wchar_t/1.cc:
 415         Likewise.
 416
 417 2021-11-16  Jonathan Wakely  <jwakely@redhat.com>
 418
 419         * testsuite/21_strings/basic_string/allocator/71964.cc: Fix
 420         typo.
 421         * testsuite/23_containers/set/allocator/71964.cc: Likewise.
 422
 423 2021-11-15  Jason Merrill  <jason@redhat.com>
 424
 425         * testsuite/20_util/to_address/1_neg.cc: Adjust error.
 426         * testsuite/26_numerics/random/concept.cc: Adjust asserts.
 427
 428 2021-11-15  François Dumont  <fdumont@gcc.gnu.org>
 429
 430         * include/bits/hashtable_policy.h:
 431         (_Hash_code_base<>::_M_hash_code(const _Hash&, const _Hash_node_value<_Value, true>&)): New.
 432         (_Hash_code_base<>::_M_hash_code<_H2>(const _H2&, const _Hash_node_value<>&)): New.
 433         * include/bits/hashtable.h (_Hashtable<>::_M_merge_unique): Use latter.
 434         (_Hashtable<>::_M_merge_multi): Likewise.
 435         * testsuite/23_containers/unordered_multiset/modifiers/merge.cc (test05): New test.
 436         * testsuite/23_containers/unordered_set/modifiers/merge.cc (test04): New test.
 437
 438 2021-11-15  Jason Merrill  <jason@redhat.com>
 439
 440         * src/c++17/memory_resource.cc: Add missing constexpr.
 441         * include/experimental/internet: Only mark copy constructor
 442         as constexpr with __cpp_constexpr_dynamic_alloc.
 443
 444 2021-11-14  François Dumont  <fdumont@gcc.gnu.org>
 445
 446         * include/debug/safe_container.h (_Safe_container<>::_M_safe): Remove.
 447         * include/debug/deque (deque::operator=(initializer_list<>)): Replace
 448         _M_base() call with _Base:: call.
 449         (deque::operator[](size_type)): Likewise.
 450         * include/debug/forward_list (forward_list(forward_list&&, const allocator_type&)):
 451         Remove _M_safe() and _M_base() calls.
 452         (forward_list::operator=(initializer_list<>)): Remove _M_base() calls.
 453         (forward_list::splice_after, forward_list::merge): Likewise.
 454         * include/debug/list (list(list&&, const allocator_type&)):
 455         Remove _M_safe() and _M_base() calls.
 456         (list::operator=(initializer_list<>)): Remove _M_base() calls.
 457         (list::splice, list::merge): Likewise.
 458         * include/debug/map.h (map(map&&, const allocator_type&)):
 459         Remove _M_safe() and _M_base() calls.
 460         (map::operator=(initializer_list<>)): Remove _M_base() calls.
 461         * include/debug/multimap.h (multimap(multimap&&, const allocator_type&)):
 462         Remove _M_safe() and _M_base() calls.
 463         (multimap::operator=(initializer_list<>)): Remove _M_base() calls.
 464         * include/debug/set.h (set(set&&, const allocator_type&)):
 465         Remove _M_safe() and _M_base() calls.
 466         (set::operator=(initializer_list<>)): Remove _M_base() calls.
 467         * include/debug/multiset.h (multiset(multiset&&, const allocator_type&)):
 468         Remove _M_safe() and _M_base() calls.
 469         (multiset::operator=(initializer_list<>)): Remove _M_base() calls.
 470         * include/debug/string (basic_string(basic_string&&, const allocator_type&)):
 471         Remove _M_safe() and _M_base() calls.
 472         (basic_string::operator=(initializer_list<>)): Remove _M_base() call.
 473         (basic_string::operator=(const _CharT*), basic_string::operator=(_CharT)): Likewise.
 474         (basic_string::operator[](size_type), basic_string::operator+=(const basic_string&)):
 475         Likewise.
 476         (basic_string::operator+=(const _Char*), basic_string::operator+=(_CharT)): Likewise.
 477         * include/debug/unordered_map (unordered_map(unordered_map&&, const allocator_type&)):
 478         Remove _M_safe() and _M_base() calls.
 479         (unordered_map::operator=(initializer_list<>), unordered_map::merge):
 480         Remove _M_base() calls.
 481         (unordered_multimap(unordered_multimap&&, const allocator_type&)):
 482         Remove _M_safe() and _M_base() calls.
 483         (unordered_multimap::operator=(initializer_list<>), unordered_multimap::merge):
 484         Remove _M_base() calls.
 485         * include/debug/unordered_set (unordered_set(unordered_set&&, const allocator_type&)):
 486         Remove _M_safe() and _M_base() calls.
 487         (unordered_set::operator=(initializer_list<>), unordered_set::merge):
 488         Remove _M_base() calls.
 489         (unordered_multiset(unordered_multiset&&, const allocator_type&)):
 490         Remove _M_safe() and _M_base() calls.
 491         (unordered_multiset::operator=(initializer_list<>), unordered_multiset::merge):
 492         Remove _M_base() calls.
 493         * include/debug/vector (vector(vector&&, const allocator_type&)):
 494         Remove _M_safe() and _M_base() calls.
 495         (vector::operator=(initializer_list<>)): Remove _M_base() calls.
 496         (vector::operator[](size_type)): Likewise.
 497
 498 2021-11-13  Jonathan Wakely  <jwakely@redhat.com>
 499
 500         * include/Makefile.am: Add spanstream header.
 501         * include/Makefile.in: Regenerate.
 502         * include/precompiled/stdc++.h: Add spanstream header.
 503         * include/std/version (__cpp_lib_spanstream): Define.
 504         * include/std/spanstream: New file.
 505         * testsuite/27_io/spanstream/1.cc: New test.
 506         * testsuite/27_io/spanstream/version.cc: New test.
 507
 508 2021-11-13  Hans-Peter Nilsson  <hp@axis.com>
 509
 510         PR libstdc++/103166
 511         * acinclude.m4 (GLIBCXX_CHECK_GETENTROPY, GLIBCXX_CHECK_ARC4RANDOM):
 512         Use GCC_TRY_COMPILE_OR_LINK instead of AC_TRY_COMPILE.
 513         * configure: Regenerate.
 514
 515 2021-11-12  Jonathan Wakely  <jwakely@redhat.com>
 516
 517         PR libstdc++/59675
 518         * acinclude.m4 (libtool_VERSION): Bump version.
 519         * config/abi/pre/gnu.ver (GLIBCXX_3.4.30): Add version and
 520         export new symbol.
 521         * configure: Regenerate.
 522         * include/bits/c++config (__replacement_assert): Remove, declare
 523         __glibcxx_assert_fail instead.
 524         * src/c++11/debug.cc (__glibcxx_assert_fail): New function to
 525         replace __replacement_assert, writing to stderr instead of
 526         stdout.
 527         * testsuite/util/testsuite_abi.cc: Update latest version.
 528
 529 2021-11-12  Jonathan Wakely  <jwakely@redhat.com>
 530             Josh Marshall  <joshua.r.marshall.1991@gmail.com>
 531
 532         * include/bits/alloc_traits.h (_Destroy): Make constexpr for
 533         C++20 mode.
 534         * include/bits/allocator.h (__shrink_to_fit::_S_do_it):
 535         Likewise.
 536         * include/bits/stl_algobase.h (__fill_a1): Declare _Bit_iterator
 537         overload constexpr for C++20.
 538         * include/bits/stl_bvector.h (_Bit_type, _S_word_bit): Move out
 539         of inline namespace.
 540         (_Bit_reference, _Bit_iterator_base, _Bit_iterator)
 541         (_Bit_const_iterator, _Bvector_impl_data, _Bvector_base)
 542         (vector<bool, A>>): Add constexpr to every member function.
 543         (_Bvector_base::_M_allocate): Initialize storage during constant
 544         evaluation.
 545         (vector<bool, A>::_M_initialize_value): Use __fill_bvector_n
 546         instead of memset.
 547         (__fill_bvector_n): New helper function to replace memset during
 548         constant evaluation.
 549         * include/bits/stl_uninitialized.h (__uninitialized_copy<false>):
 550         Move logic to ...
 551         (__do_uninit_copy): New function.
 552         (__uninitialized_fill<false>): Move logic to ...
 553         (__do_uninit_fill): New function.
 554         (__uninitialized_fill_n<false>): Move logic to ...
 555         (__do_uninit_fill_n): New function.
 556         (__uninitialized_copy_a): Add constexpr. Use __do_uninit_copy.
 557         (__uninitialized_move_a, __uninitialized_move_if_noexcept_a):
 558         Add constexpr.
 559         (__uninitialized_fill_a): Add constexpr. Use __do_uninit_fill.
 560         (__uninitialized_fill_n_a): Add constexpr. Use
 561         __do_uninit_fill_n.
 562         (__uninitialized_default_n, __uninitialized_default_n_a)
 563         (__relocate_a_1, __relocate_a): Add constexpr.
 564         * include/bits/stl_vector.h (_Vector_impl_data, _Vector_impl)
 565         (_Vector_base, vector): Add constexpr to every member function.
 566         (_Vector_impl::_S_adjust): Disable ASan annotation during
 567         constant evaluation.
 568         (_Vector_base::_S_use_relocate): Disable bitwise-relocation
 569         during constant evaluation.
 570         (vector::_Temporary_value): Use a union for storage.
 571         * include/bits/vector.tcc (vector, vector<bool>): Add constexpr
 572         to every member function.
 573         * include/std/vector (erase_if, erase): Add constexpr.
 574         * testsuite/23_containers/headers/vector/synopsis.cc: Add
 575         constexpr for C++20 mode.
 576         * testsuite/23_containers/vector/bool/cmp_c++20.cc: Change to
 577         compile-only test using constant expressions.
 578         * testsuite/23_containers/vector/bool/capacity/29134.cc: Adjust
 579         namespace for _S_word_bit.
 580         * testsuite/23_containers/vector/bool/modifiers/insert/31370.cc:
 581         Likewise.
 582         * testsuite/23_containers/vector/cmp_c++20.cc: Likewise.
 583         * testsuite/23_containers/vector/cons/89164.cc: Adjust errors
 584         for C++20 and move C++17 test to ...
 585         * testsuite/23_containers/vector/cons/89164_c++17.cc: ... here.
 586         * testsuite/23_containers/vector/bool/capacity/constexpr.cc: New test.
 587         * testsuite/23_containers/vector/bool/cons/constexpr.cc: New test.
 588         * testsuite/23_containers/vector/bool/element_access/constexpr.cc: New test.
 589         * testsuite/23_containers/vector/bool/modifiers/assign/constexpr.cc: New test.
 590         * testsuite/23_containers/vector/bool/modifiers/constexpr.cc: New test.
 591         * testsuite/23_containers/vector/bool/modifiers/swap/constexpr.cc: New test.
 592         * testsuite/23_containers/vector/capacity/constexpr.cc: New test.
 593         * testsuite/23_containers/vector/cons/constexpr.cc: New test.
 594         * testsuite/23_containers/vector/data_access/constexpr.cc: New test.
 595         * testsuite/23_containers/vector/element_access/constexpr.cc: New test.
 596         * testsuite/23_containers/vector/modifiers/assign/constexpr.cc: New test.
 597         * testsuite/23_containers/vector/modifiers/constexpr.cc: New test.
 598         * testsuite/23_containers/vector/modifiers/swap/constexpr.cc: New test.
 599
 600 2021-11-11  Jonathan Wakely  <jwakely@redhat.com>
 601
 602         * include/debug/deque (deque::operator=(const deque&)): Remove
 603         definition.
 604         * include/debug/list (list::operator=(const list&)): Likewise.
 605         * include/debug/map.h (map::operator=(const map&)): Likewise.
 606         * include/debug/multimap.h (multimap::operator=(const multimap&)):
 607         Likewise.
 608         * include/debug/multiset.h (multiset::operator=(const multiset&)):
 609         Likewise.
 610         * include/debug/set.h (set::operator=(const set&)): Likewise.
 611         * include/debug/string (basic_string::operator=(const basic_string&)):
 612         Likewise.
 613         * include/debug/vector (vector::operator=(const vector&)):
 614         Likewise.
 615         (_Safe_vector::operator=(const _Safe_vector&)): Define for
 616         C++98 as well.
 617
 618 2021-11-11  Jonathan Wakely  <jwakely@redhat.com>
 619
 620         * include/std/memory_resource (memory_resource::allocate):
 621         Implicitly create objects in the returned storage.
 622
 623 2021-11-11  Jonathan Wakely  <jwakely@redhat.com>
 624
 625         * include/bits/stl_bvector.h (vector<bool>::data()): Give
 626         protected access, and delete for C++11 and later.
 627
 628 2021-11-10  Jonathan Wakely  <jwakely@redhat.com>
 629
 630         PR libstdc++/100117
 631         * testsuite/17_intro/headers/c++1998/49745.cc: Explicitly list
 632         all C++ headers instead of including <bits/stdc++.h>
 633
 634 2021-11-10  Jonathan Wakely  <jwakely@redhat.com>
 635
 636         PR libstdc++/100748
 637         PR libstdc++/103133
 638         * config/os/gnu-linux/os_defines.h (_GLIBCXX_GTHREAD_USE_WEAK):
 639         Define for glibc 2.34 and later.
 640
 641 2021-11-09  François Dumont  <fdumont@gcc.gnu.org>
 642
 643         * include/bits/hashtable_policy.h (__distance_fw): Replace class keyword with
 644         typename.
 645         * include/bits/hashtable.h (_Hashtable<>::_M_merge_unique): Remove noexcept
 646         qualification. Use const_iterator for node extraction/reinsert.
 647         (_Hashtable<>::_M_merge_multi): Likewise. Compute new hash code before extract.
 648         * include/debug/safe_container.h (_Safe_container<>): Make all methods
 649         protected.
 650         * include/debug/safe_unordered_container.h
 651         (_Safe_unordered_container<>::_UContInvalidatePred<_ExtractKey, _Source>): New.
 652         (_Safe_unordered_container<>::_UMContInvalidatePred<_ExtractKey, _Source>): New.
 653         (_Safe_unordered_container<>::_UContMergeGuard<_Source, _InvalidatePred>): New.
 654         (_Safe_unordered_container<>::_S_uc_guard<_ExtractKey, _Source>): New.
 655         (_Safe_unordered_container<>::_S_umc_guard<_ExtractKey, _Source>): New.
 656         (_Safe_unordered_container<>::_M_invalide_all): Make public.
 657         (_Safe_unordered_container<>::_M_invalide_if): Likewise.
 658         (_Safe_unordered_container<>::_M_invalide_local_if): Likewise.
 659         * include/debug/unordered_map
 660         (unordered_map<>::mapped_type, pointer, const_pointer): New typedef.
 661         (unordered_map<>::reference, const_reference, difference_type): New typedef.
 662         (unordered_map<>::get_allocator, empty, size, max_size): Add usings.
 663         (unordered_map<>::bucket_count, max_bucket_count, bucket): Add usings.
 664         (unordered_map<>::hash_function, key_equal, count, contains): Add usings.
 665         (unordered_map<>::operator[], at, rehash, reserve): Add usings.
 666         (unordered_map<>::merge): New.
 667         (unordered_multimap<>::mapped_type, pointer, const_pointer): New typedef.
 668         (unordered_multimap<>::reference, const_reference, difference_type): New typedef.
 669         (unordered_multimap<>::get_allocator, empty, size, max_size): Add usings.
 670         (unordered_multimap<>::bucket_count, max_bucket_count, bucket): Add usings.
 671         (unordered_multimap<>::hash_function, key_equal, count, contains): Add usings.
 672         (unordered_multimap<>::rehash, reserve): Add usings.
 673         (unordered_multimap<>::merge): New.
 674         * include/debug/unordered_set
 675         (unordered_set<>::mapped_type, pointer, const_pointer): New typedef.
 676         (unordered_set<>::reference, const_reference, difference_type): New typedef.
 677         (unordered_set<>::get_allocator, empty, size, max_size): Add usings.
 678         (unordered_set<>::bucket_count, max_bucket_count, bucket): Add usings.
 679         (unordered_set<>::hash_function, key_equal, count, contains): Add usings.
 680         (unordered_set<>::rehash, reserve): Add usings.
 681         (unordered_set<>::merge): New.
 682         (unordered_multiset<>::mapped_type, pointer, const_pointer): New typedef.
 683         (unordered_multiset<>::reference, const_reference, difference_type): New typedef.
 684         (unordered_multiset<>::get_allocator, empty, size, max_size): Add usings.
 685         (unordered_multiset<>::bucket_count, max_bucket_count, bucket): Add usings.
 686         (unordered_multiset<>::hash_function, key_equal, count, contains): Add usings.
 687         (unordered_multiset<>::rehash, reserve): Add usings.
 688         (unordered_multiset<>::merge): New.
 689         * testsuite/23_containers/unordered_map/debug/merge1_neg.cc: New test.
 690         * testsuite/23_containers/unordered_map/debug/merge2_neg.cc: New test.
 691         * testsuite/23_containers/unordered_map/debug/merge3_neg.cc: New test.
 692         * testsuite/23_containers/unordered_map/debug/merge4_neg.cc: New test.
 693         * testsuite/23_containers/unordered_multimap/debug/merge1_neg.cc: New test.
 694         * testsuite/23_containers/unordered_multimap/debug/merge2_neg.cc: New test.
 695         * testsuite/23_containers/unordered_multimap/debug/merge3_neg.cc: New test.
 696         * testsuite/23_containers/unordered_multimap/debug/merge4_neg.cc: New test.
 697         * testsuite/23_containers/unordered_multiset/debug/merge1_neg.cc: New test.
 698         * testsuite/23_containers/unordered_multiset/debug/merge2_neg.cc: New test.
 699         * testsuite/23_containers/unordered_multiset/debug/merge3_neg.cc: New test.
 700         * testsuite/23_containers/unordered_multiset/debug/merge4_neg.cc: New test.
 701         * testsuite/23_containers/unordered_set/debug/merge1_neg.cc: New test.
 702         * testsuite/23_containers/unordered_set/debug/merge2_neg.cc: New test.
 703         * testsuite/23_containers/unordered_set/debug/merge3_neg.cc: New test.
 704         * testsuite/23_containers/unordered_set/debug/merge4_neg.cc: New test.
 705         * testsuite/util/testsuite_abi.h: [_GLIBCXX_DEBUG] Use normal unordered
 706         container implementation.
 707
 708 2021-11-09  Jonathan Wakely  <jwakely@redhat.com>
 709
 710         * testsuite/26_numerics/random/random_device/cons/token.cc:
 711         Print results of random_device_available checks.
 712
 713 2021-11-09  Jonathan Wakely  <jwakely@redhat.com>
 714
 715         PR libstdc++/103146
 716         * src/c++11/random.cc: Check __powerpc64__ not __powerpc__.
 717
 718 2021-11-09  Jonathan Wakely  <jwakely@redhat.com>
 719
 720         * acinclude.m4 (GLIBCXX_CHECK_GETENTROPY, GLIBCXX_CHECK_ARC4RANDOM):
 721         Define.
 722         * configure.ac (GLIBCXX_CHECK_GETENTROPY, GLIBCXX_CHECK_ARC4RANDOM):
 723         Use them.
 724         * config.h.in: Regenerate.
 725         * configure: Regenerate.
 726         * src/c++11/random.cc (random_device): Add getentropy and
 727         arc4random as sources.
 728         * testsuite/26_numerics/random/random_device/cons/token.cc:
 729         Check new tokens.
 730         * testsuite/26_numerics/random/random_device/entropy.cc:
 731         Likewise.
 732
 733 2021-11-09  Jonathan Wakely  <jwakely@redhat.com>
 734
 735         * testsuite/26_numerics/random/random_device/cons/token.cc:
 736         Retry if random devices produce the same value.
 737
 738 2021-11-09  Rasmus Villemoes  <rasmus.villemoes@prevas.dk>
 739
 740         * config/os/vxworks/os_defines.h (_GLIBCXX_HAVE_TLS): Only
 741         define for VxWorks >= 6.6.
 742
 743 2021-11-05  Jonathan Wakely  <jwakely@redhat.com>
 744
 745         * include/bits/range_access.h (begin(valarray), end(valarray)):
 746         Add noexcept.
 747
 748 2021-11-05  Jonathan Wakely  <jwakely@redhat.com>
 749
 750         * include/std/tuple (tuple_size_v): Fix pack expansion.
 751
 752 2021-11-05  Jonathan Wakely  <jwakely@redhat.com>
 753
 754         * src/c++11/random.cc (__x86_rdrand, __x86_rdseed): Add
 755         [[unlikely]] attribute.
 756
 757 2021-11-05  Jonathan Wakely  <jwakely@redhat.com>
 758
 759         * src/c++11/random.cc [__powerpc__] (USE_DARN): Define.
 760         (__ppc_darn): New function to use POWER9 DARN instruction.
 761         (Which): Add 'darn' enumerator.
 762         (which_source): Check for __ppc_darn.
 763         (random_device::_M_init): Support "darn" and "hw" tokens.
 764         (random_device::_M_getentropy): Add darn to switch.
 765         * testsuite/26_numerics/random/random_device/cons/token.cc:
 766         Check "darn" token.
 767         * testsuite/26_numerics/random/random_device/entropy.cc:
 768         Likewise.
 769
 770 2021-11-05  Jonathan Wakely  <jwakely@redhat.com>
 771
 772         * testsuite/lib/gdb-test.exp: Add target selector support to the
 773         dg-final directives.
 774         * testsuite/libstdc++-prettyprinters/80276.cc: Add xfail for
 775         C++20.
 776         * testsuite/libstdc++-prettyprinters/libfundts.cc: Likewise.
 777         * testsuite/libstdc++-prettyprinters/prettyprinters.exp: Tweak
 778         comment.
 779
 780 2021-11-04  Jonathan Wakely  <jwakely@redhat.com>
 781
 782         PR libstdc++/103086
 783         * python/libstdcxx/v6/printers.py (_tuple_impl_get): New helper
 784         for accessing the tuple element stored in a _Tuple_impl node.
 785         (tuple_get): New function for accessing a tuple element.
 786         (unique_ptr_get): New function for accessing a unique_ptr.
 787         (UniquePointerPrinter, StdPathPrinter): Use unique_ptr_get.
 788         * python/libstdcxx/v6/xmethods.py (UniquePtrGetWorker): Cast
 789         tuple to its base class before accessing _M_head_impl.
 790
 791 2021-11-04  Jonathan Wakely  <jwakely@redhat.com>
 792
 793         * doc/xml/manual/evolution.xml: Document deprecations.
 794         * doc/html/*: Regenerate.
 795         * libsupc++/exception (unexpected_handler, unexpected)
 796         (get_unexpected, set_unexpected): Add deprecated attribute.
 797         Do not define without _GLIBCXX_USE_DEPRECATED for C++17 and up.
 798         * libsupc++/eh_personality.cc (PERSONALITY_FUNCTION): Disable
 799         deprecated warnings.
 800         * libsupc++/eh_ptr.cc (std::rethrow_exception): Likewise.
 801         * libsupc++/eh_terminate.cc: Likewise.
 802         * libsupc++/eh_throw.cc (__cxa_init_primary_exception):
 803         Likewise.
 804         * libsupc++/unwind-cxx.h (struct __cxa_exception): Use
 805         terminate_handler instead of unexpected_handler.
 806         (struct __cxa_dependent_exception): Likewise.
 807         (__unexpected): Likewise.
 808         * testsuite/18_support/headers/exception/synopsis.cc: Add
 809         dg-warning for deprecated warning.
 810         * testsuite/18_support/exception_ptr/60612-unexpected.cc:
 811         Disable deprecated warnings.
 812         * testsuite/18_support/set_unexpected.cc: Likewise.
 813         * testsuite/18_support/unexpected_handler.cc: Likewise.
 814
 815 2021-11-04  Jonathan Wakely  <jwakely@redhat.com>
 816
 817         * include/bits/utility.h (__find_uniq_type_in_pack): Move
 818         definition to here, ...
 819         * include/std/tuple (__find_uniq_type_in_pack): ... from here.
 820         * include/std/variant (__detail__variant::__index_of): Remove.
 821         (__detail::__variant::__exactly_once): Define using
 822         __find_uniq_type_in_pack instead of __index_of.
 823         (get<T>, get_if<T>, variant::__index_of): Likewise.
 824
 825 2021-11-04  Jonathan Wakely  <jwakely@redhat.com>
 826
 827         * include/bits/stl_pair.h (tuple_size_v): Define partial
 828         specializations for std::pair.
 829         * include/bits/utility.h (_Nth_type): Move definition here
 830         and define primary template.
 831         (tuple_size_v): Move definition here.
 832         * include/std/array (tuple_size_v): Define partial
 833         specializations for std::array.
 834         * include/std/tuple (tuple_size_v): Move primary template to
 835         <bits/utility.h>.  Define partial specializations for
 836         std::tuple.
 837         (tuple_element): Change definition to use _Nth_type.
 838         * include/std/variant (_Nth_type): Move to <bits/utility.h>.
 839         (variant_alternative, variant): Adjust qualification of
 840         _Nth_type.
 841         * testsuite/20_util/tuple/element_access/get_neg.cc: Prune
 842         additional errors from _Nth_type.
 843
 844 2021-11-04  Jonathan Wakely  <jwakely@redhat.com>
 845
 846         * include/std/variant (__detail::__variant::__emplace): New
 847         function template.
 848         (_Copy_assign_base::operator=): Reorder conditions to match
 849         bulleted list of effects in the standard. Use __emplace instead
 850         of _M_reset followed by _Construct.
 851         (_Move_assign_base::operator=): Likewise.
 852         (__construct_by_index): Remove.
 853         (variant::emplace): Use __emplace instead of _M_reset followed
 854         by __construct_by_index.
 855         (variant::swap): Hoist valueless cases out of visitor. Use
 856         __emplace to replace _M_reset followed by _Construct.
 857
 858 2021-11-04  Jonathan Wakely  <jwakely@redhat.com>
 859
 860         * include/std/variant (_Nth_type): Define partial
 861         specializations to reduce number of instantiations.
 862         (variant_size_v): Define partial specializations to avoid
 863         instantiations.
 864         (variant_alternative): Use _Nth_type. Add static assert.
 865         (__tuple_count, __tuple_count_v): Replace with ...
 866         (__count): New variable template.
 867         (_Variant_union): Add deleted constructor.
 868         (variant::__to_type): Use _Nth_type.
 869         (variant::emplace): Use _Nth_type. Add deleted overloads for
 870         invalid types and indices.
 871
 872 2021-11-04  Jonathan Wakely  <jwakely@redhat.com>
 873
 874         PR libstdc++/102912
 875         * include/std/variant (_Variant_storage::__index_of): Remove.
 876         (__variant_construct_single): Remove.
 877         (__variant_construct): Remove.
 878         (_Copy_ctor_base::_Copy_ctor_base(const _Copy_ctor_base&)): Do
 879         construction directly instead of using __variant_construct.
 880         (_Move_ctor_base::_Move_ctor_base(_Move_ctor_base&&)): Likewise.
 881         (_Move_ctor_base::_M_destructive_move()): Remove.
 882         (_Move_ctor_base::_M_destructive_copy()): Remove.
 883         (_Copy_assign_base::operator=(const _Copy_assign_base&)): Do
 884         construction directly instead of using _M_destructive_copy.
 885         (variant::swap): Do construction directly instead of using
 886         _M_destructive_move.
 887         * testsuite/20_util/variant/102912.cc: New test.
 888
 889 2021-11-03  Jonathan Wakely  <jwakely@redhat.com>
 890
 891         PR libstdc++/66742
 892         * include/bits/list.tcc (list::sort): Use mutable iterators for
 893         comparisons.
 894         * include/bits/stl_list.h (_Scratch_list::_Ptr_cmp): Likewise.
 895         * testsuite/23_containers/list/operations/66742.cc: Check
 896         non-const comparisons.
 897
 898 2021-11-03  Jonathan Wakely  <jwakely@redhat.com>
 899
 900         * include/std/valarray (valarray::valarray()): Add noexcept.
 901         (valarray::operator[]): Likewise.
 902
 903 2021-11-01  Jonathan Wakely  <jwakely@redhat.com>
 904
 905         * include/debug/stl_iterator.h (__valid_range): Add constexpr
 906         for C++20. Qualify call to avoid ADL.
 907         (__get_distance, __can_advance, __unsafe, __base): Likewise.
 908         * testsuite/25_algorithms/move/constexpr.cc: Also check with
 909         std::reverse_iterator arguments.
 910
 911 2021-11-01  Jonathan Wakely  <jwakely@redhat.com>
 912
 913         * include/std/span (span(Range&&)): Reorder constraints.
 914
 915 2021-11-01  Jonathan Wakely  <jwakely@redhat.com>
 916
 917         PR libstdc++/103022
 918         * include/std/valarray (begin, end): Do not dereference an empty
 919         valarray. Add noexcept and [[nodiscard]].
 920         * testsuite/26_numerics/valarray/range_access.cc: Check empty
 921         valarray. Check iterator properties. Run as well as compiling.
 922         * testsuite/26_numerics/valarray/range_access2.cc: Likewise.
 923         * testsuite/26_numerics/valarray/103022.cc: New test.
 924
 925 2021-10-29  Jonathan Wakely  <jwakely@redhat.com>
 926
 927         * testsuite/23_containers/stack/deduction.cc: Fix typo.
 928
 929 2021-10-26  Martin Sebor  <msebor@redhat.com>
 930
 931         * testsuite/21_strings/basic_string/capacity/1.cc: Also suppress
 932         -Wstringop-overread.
 933         * testsuite/27_io/filesystem/path/factory/u8path-char8_t.cc: Same.
 934
 935 2021-10-26  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
 936
 937         * testsuite/28_regex/basic_regex/84110.cc (test01)
 938         [__cpp_exceptions]: Disambiguate extended.
 939
 940 2021-10-26  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
 941
 942         * testsuite/17_intro/names.cc [__sun__] (r, x): Undef.
 943
 944 2021-10-22  Jonathan Wakely  <jwakely@redhat.com>
 945
 946         PR libstdc++/102894
 947         * include/std/any (make_any): Add SFINAE constraint.
 948         * testsuite/20_util/any/102894.cc: New test.
 949
 950 2021-10-21  Jonathan Wakely  <jwakely@redhat.com>
 951
 952         * doc/doxygen/stdheader.cc: Refactor. Use C++23. Add new
 953         headers.
 954         * scripts/run_doxygen: Fix post-processing of #include
 955         directives in man pages. Use new xg++ to compile helper program.
 956
 957 2021-10-21  Jonathan Wakely  <jwakely@redhat.com>
 958
 959         * include/bits/mofunc_impl.h: Add doxygen comments.
 960         * include/std/functional: Likewise.
 961
 962 2021-10-21  Jonathan Wakely  <jwakely@redhat.com>
 963
 964         * include/bits/alloc_traits.h: Suppress doxygen documentation.
 965         * include/bits/allocated_ptr.h: Likewise.
 966         * include/bits/enable_special_members.h: Likewise.
 967         * include/bits/hashtable.h: Likewise.
 968         * include/bits/hashtable_policy.h: Likewise.
 969         * include/bits/uses_allocator.h: Likewise.
 970         * include/bits/node_handle.h: Document node handles and suppress
 971         documentation for protected members.
 972         * include/std/any: Suppress documentation for implementation
 973         details.
 974
 975 2021-10-21  Patrick Palka  <ppalka@redhat.com>
 976
 977         PR libstdc++/102358
 978         * include/bits/stl_iterator.h (__niter_base): Make constexpr
 979         for C++20.
 980         (__miter_base): Likewise.
 981         * testsuite/25_algorithms/move/constexpr.cc: New test.
 982
 983 2021-10-21  Patrick Palka  <ppalka@redhat.com>
 984
 985         * include/std/ranges (istream_view): Replace this function
 986         template with an alias template as per P2432R1.
 987         (wistream_view): Define as per P2432R1.
 988         (views::_Istream, views::istream): Likewise.
 989         * testsuite/std/ranges/istream_view.cc (test07): New test.
 990
 991 2021-10-21  Patrick Palka  <ppalka@redhat.com>
 992
 993         * include/bits/ranges_util.h (views::_Drop): Forward declare.
 994         (subrange): Befriend views::_Drop.
 995         (subrange::_S_store_size): Declare constexpr instead of just
 996         const, remove obsolete comment.
 997         * include/std/ranges (views::__detail::__is_empty_view): Define.
 998         (views::__detail::__is_basic_string_view): Likewise.
 999         (views::__detail::__is_subrange): Likewise.
1000         (views::__detail::__is_iota_view): Likewise.
1001         (views::__detail::__can_take_view): Rename template parm _Tp to _Dp.
1002         (views::_Take): Rename template parm _Tp to _Dp, make it non-deducible
1003         and fix it to range_difference_t<_Range>.  Implement P1739R4 and
1004         LWG 3407 changes.
1005         (views::__detail::__can_drop_view): Rename template parm _Tp to _Dp.
1006         (views::_Drop): As with views::_Take.
1007         (views::_Counted): Implement P1739R4 changes.
1008         * include/std/span (__detail::__is_std_span): Rename to ...
1009         (__detail::__is_span): ... this and turn it into a variable
1010         template.
1011         (__detail::__is_std_array): Turn it into a variable template.
1012         (span::span): Adjust uses of __is_std_span and __is_std_array
1013         accordingly.
1014         * testsuite/std/ranges/adaptors/p1739.cc: New test.
1015
1016 2021-10-21  Patrick Palka  <ppalka@redhat.com>
1017
1018         * include/bits/stl_iterator.h (common_iterator::__arrow_proxy):
1019         Make fully constexpr as per LWG 3595.
1020         (common_iterator::__postfix_proxy): Likewise.
1021
1022 2021-10-21  Patrick Palka  <ppalka@redhat.com>
1023
1024         * include/std/ranges (lazy_split_view::base): Add forward_range
1025         constraint as per LWG 3591.
1026         (lazy_split_view::begin, lazy_split_view::end): Also check
1027         simpleness of _Pattern as per LWG 3592.
1028         (split_view::base): Relax copyable constraint as per LWG 3590.
1029
1030 2021-10-21  Patrick Palka  <ppalka@redhat.com>
1031
1032         * include/std/ranges (join_view::__iter_cat::_S_iter_cat): Adjust
1033         criteria for returning bidirectional_iterator_tag as per LWG 3535.
1034         (join_view::_Iterator::_S_iter_concept): Likewise.
1035
1036 2021-10-21  Patrick Palka  <ppalka@redhat.com>
1037
1038         * include/bits/ranges_base.h (viewable_range): Adjust as per
1039         LWG 3481.
1040         * testsuite/std/ranges/adaptors/all.cc (test07): New test.
1041
1042 2021-10-21  Jonathan Wakely  <jwakely@redhat.com>
1043
1044         PR libstdc++/102863
1045         * include/std/optional (optional::and_then, optional::transform):
1046         Remove requires-clause.
1047         * testsuite/20_util/optional/monadic/and_then.cc: Check
1048         overload resolution doesn't cause errors.
1049         * testsuite/20_util/optional/monadic/transform.cc: Likewise.
1050
1051 2021-10-20  Jonathan Wakely  <jwakely@redhat.com>
1052
1053         * testsuite/20_util/optional/monadic/transform.cc: Check that
1054         an rvalue result is not materialized too soon.
1055
1056 2021-10-19  Patrick Palka  <ppalka@redhat.com>
1057
1058         * include/std/ranges (iota_view::_Iterator::operator+): Adjust
1059         definition as per LWG 3580.
1060         (iota_view::_Iterator::operator-): Likewise.
1061
1062 2021-10-19  Patrick Palka  <ppalka@redhat.com>
1063
1064         * include/std/ranges (basic_istream_view::_M_object): Value
1065         initialize as per LWG 3568.
1066
1067 2021-10-19  Patrick Palka  <ppalka@redhat.com>
1068
1069         * include/bits/ranges_util.h
1070         (__detail::__uses_nonqualification_pointer_conversion): Define
1071         and use it ...
1072         (__detail::__convertible_to_nonslicing): ... here, as per LWG 3470.
1073         * testsuite/std/ranges/subrange/1.cc: New test.
1074
1075 2021-10-19  Patrick Palka  <ppalka@redhat.com>
1076
1077         * include/std/ranges (iota_view::_Iterator): Befriend iota_view.
1078         (iota_view::_Sentinel): Likewise.
1079         (iota_view::iota_view): Add three overloads, each taking an
1080         iterator/sentinel pair as per LWG 3523.
1081         * testsuite/std/ranges/iota/iota_view.cc (test06): New test.
1082
1083 2021-10-19  Patrick Palka  <ppalka@redhat.com>
1084
1085         * include/bits/ranges_base.h (view_interface): Forward declare.
1086         (__detail::__is_derived_from_view_interface_fn): Declare.
1087         (__detail::__is_derived_from_view_interface): Define as per LWG 3549.
1088         (enable_view): Adjust as per LWG 3549.
1089         * include/bits/ranges_util.h (view_interface): Don't derive from
1090         view_base.
1091         * include/std/ranges (filter_view): Revert r11-3504 change.
1092         (transform_view): Likewise.
1093         (take_view): Likewise.
1094         (take_while_view): Likewise.
1095         (drop_view): Likewise.
1096         (drop_while_view): Likewise.
1097         (join_view): Likewise.
1098         (lazy_split_view): Likewise.
1099         (split_view): Likewise.
1100         (reverse_view): Likewise.
1101         * testsuite/std/ranges/adaptors/sizeof.cc: Update expected sizes.
1102         * testsuite/std/ranges/view.cc (test_view::test_view): Remove
1103         this default ctor since views no longer need to be default initable.
1104         (test01): New test.
1105
1106 2021-10-19  Jonathan Wakely  <jwakely@redhat.com>
1107
1108         * src/c++11/random.cc (which_source): New helper function.
1109         (random_device::_M_getentropy()): Use which_source and return
1110         suitable values for sources other than device files.
1111         * testsuite/26_numerics/random/random_device/entropy.cc: New test.
1112
1113 2021-10-19  Jonathan Wakely  <jwakely@redhat.com>
1114
1115         * doc/Makefile.am (stamp-html-doxygen, stamp-html-doxygen)
1116         (stamp-latex-doxygen, stamp-man-doxygen): Fix recipes for
1117         relative ${top_srcdir}.
1118         * doc/Makefile.in: Regenerate.
1119
1120 2021-10-19  Jonathan Wakely  <jwakely@redhat.com>
1121
1122         * include/std/variant (_Uninitialized): Use an empty struct
1123         for the unused union member, instead of char.
1124
1125 2021-10-19  Jonathan Wakely  <jwakely@redhat.com>
1126
1127         * include/bits/stl_stack.h (stack(Iterator, Iterator)): Remove
1128         non-deducible template parameter from deduction guide.
1129         * testsuite/23_containers/stack/deduction.cc: Check new C++23
1130         deduction guides.
1131
1132 2021-10-19  Jonathan Wakely  <jwakely@redhat.com>
1133
1134         * include/std/optional (_Optional_payload_base::_Storage): Add
1135         constructor taking a callable function to invoke.
1136         (_Optional_payload_base::_M_apply): New function.
1137         (__cpp_lib_monadic_optional): Define for C++23.
1138         (optional::and_then, optional::transform, optional::or_else):
1139         Define for C++23.
1140         * include/std/ranges (__detail::__cached): Remove.
1141         (__detail::__non_propagating_cache): Remove use of __cached for
1142         contained value. Use _Optional_payload_base::_M_construct and
1143         _Optional_payload_base::_M_apply to set the contained value.
1144         * include/std/version (__cpp_lib_monadic_optional): Define.
1145         * testsuite/20_util/optional/monadic/and_then.cc: New test.
1146         * testsuite/20_util/optional/monadic/or_else.cc: New test.
1147         * testsuite/20_util/optional/monadic/or_else_neg.cc: New test.
1148         * testsuite/20_util/optional/monadic/transform.cc: New test.
1149         * testsuite/20_util/optional/monadic/version.cc: New test.
1150
1151 2021-10-19  Jonathan Wakely  <jwakely@redhat.com>
1152
1153         PR libstdc++/102825
1154         * include/bits/mofunc_impl.h (move_only_function): Remove
1155         invalid base initializer.
1156         * testsuite/20_util/move_only_function/cons.cc: Instantiate
1157         constructors to check bodies.
1158
1159 2021-10-15  Jonathan Wakely  <jwakely@redhat.com>
1160
1161         * include/bits/fs_path.h (path::_S_convert(T)): Avoid recursive
1162         call to function with deduced return type.
1163
1164 2021-10-15  Jonathan Wakely  <jwakely@redhat.com>
1165
1166         * include/bits/basic_string.h (__cpp_lib_string_resize_and_overwrite):
1167         Define for C++23.
1168         (basic_string::resize_and_overwrite): Declare.
1169         * include/bits/basic_string.tcc (basic_string::resize_and_overwrite):
1170         Define.
1171         * include/std/version (__cpp_lib_resize_and_overwrite): Define
1172         for C++23.
1173         * testsuite/21_strings/basic_string/capacity/char/resize_and_overwrite.cc:
1174         New test.
1175
1176 2021-10-15  Jonathan Wakely  <jwakely@redhat.com>
1177
1178         PR libstdc++/101263
1179         * include/std/ranges (__cached): New wrapper struct.
1180         (__non_propagating_cache): Use __cached for contained value.
1181         (__non_propagating_cache::_M_emplace_deref): Add constexpr. Use
1182         std::construct_at instead of placement new.
1183         * testsuite/std/ranges/adaptors/join.cc: Check constexpr works.
1184
1185 2021-10-15  Jonathan Wakely  <jwakely@redhat.com>
1186
1187         * include/std/variant (__cpp_lib_variant): Update value for
1188         C++20.
1189         (__variant_cast, __variant_construct): Add constexpr for C++20.
1190         (__variant_construct_single, __construct_by_index) Likewise. Use
1191         std::_Construct instead of placement new.
1192         (_Uninitialized<T, false>) [__cplusplus >= 202002]: Replace
1193         buffer with a union and define a destructor.
1194         (_Variadic_union) [__cplusplus >= 202002]: Add a specialization
1195         for non-trivial destruction.
1196         (_Variant_storage::__index_of): New helper variable template.
1197         (_Variant_storage::~_Variant_storage()): Add constexpr.
1198         (_Variant_storage::_M_reset()): Likewise.
1199         (_Copy_ctor_base, _Move_ctor_base): Likewise.
1200         (_Copy_assign_base, _Move_assign_base): Likewise.
1201         (variant, swap): Likewise.
1202         * include/std/version (__cpp_lib_variant): Update value for
1203         C++20.
1204         * testsuite/20_util/optional/version.cc: Check for exact value
1205         in C++17.
1206         * testsuite/20_util/variant/87619.cc: Increase timeout for
1207         C++20 mode.
1208         * testsuite/20_util/variant/constexpr.cc: New test.
1209         * testsuite/20_util/variant/version.cc: New test.
1210
1211 2021-10-15  Jonathan Wakely  <jwakely@redhat.com>
1212
1213         * include/std/variant (__detail::__variant::__get_storage):
1214         Remove unused function.
1215         (__variant_construct_by_index): Set index after construction is
1216         complete. Rename to ...
1217         (__detail::__variant::__construct_by_index): ... this.
1218         (variant): Use new name for __variant_construct_by_index friend
1219         declaration. Remove __get_storage friend declaration.
1220         (variant::emplace): Use new name and remove try-blocks.
1221
1222 2021-10-15  Jonathan Wakely  <jwakely@redhat.com>
1223
1224         * include/std/variant (_Variant_storage::_M_storage()): Remove.
1225         (__detail::__variant::__get_storage): Remove.
1226         (variant): Remove friend declaration of __get_storage.
1227
1228 2021-10-15  Jason Merrill  <jason@redhat.com>
1229
1230         * testsuite/20_util/integer_comparisons/greater_equal_neg.cc:
1231         * testsuite/20_util/integer_comparisons/greater_neg.cc:
1232         * testsuite/20_util/integer_comparisons/less_equal_neg.cc:
1233         Adjust expected message.
1234         * testsuite/lib/prune.exp: Prune 'in constexpr expansion'.
1235
1236 2021-10-14  Jonathan Wakely  <jwakely@redhat.com>
1237
1238         * include/std/variant (__variant::__get(in_place_index_t<N>, U&&)):
1239         Rename to __get_n and remove first argument. Replace pair of
1240         overloads with a single function using 'if constexpr'.
1241         (__variant::__get(Variant&&)): Adjust to use __get_n.
1242
1243 2021-10-14  Jonathan Wakely  <jwakely@redhat.com>
1244
1245         * include/bits/fs_path.h (path(path&&)): Make unconditionally
1246         noexcept.
1247         (path::_S_convert(T)): Add condtional noexcept.
1248
1249 2021-10-14  Jonathan Wakely  <jwakely@redhat.com>
1250
1251         PR libstdc++/102743
1252         * include/bits/fs_path.h (path::_S_convert(T)): Fix condition
1253         for returning the same string unchanged.
1254
1255 2021-10-14  Jonathan Wakely  <jwakely@redhat.com>
1256
1257         * include/bits/regex.h: Check __cpp_inline_variables instead of
1258         __cplusplus.
1259
1260 2021-10-14  Jonathan Wakely  <jwakely@redhat.com>
1261
1262         * testsuite/20_util/is_layout_compatible/version.cc: Check
1263         correct macro.
1264
1265 2021-10-14  Jonathan Wakely  <jwakely@redhat.com>
1266
1267         * include/bits/stl_construct.h (_Construct): Use
1268         std::construct_at when constant evaluated.
1269         * include/std/optional (_Storage, _Optional_payload, optional):
1270         Add constexpr as specified by P2231R1.
1271         * include/std/version (__cpp_lib_optional): Update value for
1272         C++20.
1273         * testsuite/20_util/optional/requirements.cc: Check feature test
1274         macro.
1275         * testsuite/20_util/optional/constexpr/assign.cc: New test.
1276         * testsuite/20_util/optional/constexpr/cons/conv.cc: New test.
1277         * testsuite/20_util/optional/constexpr/modifiers.cc: New test.
1278         * testsuite/20_util/optional/constexpr/swap.cc: New test.
1279         * testsuite/20_util/optional/version.cc: New test.
1280
1281 2021-10-13  Jonathan Wakely  <jwakely@redhat.com>
1282
1283         * include/bits/fs_path.h (__detail::__is_contiguous): Add
1284         partial specializations for pointers and __normal_iterator.
1285
1286 2021-10-13  Jonathan Wakely  <jwakely@redhat.com>
1287
1288         * testsuite/27_io/filesystem/path/construct/102592.C: Moved to...
1289         * testsuite/27_io/filesystem/path/construct/102592.cc: ...here.
1290         * testsuite/28_regex/match_results/102667.C: Moved to...
1291         * testsuite/28_regex/match_results/102667.cc: ...here.
1292
1293 2021-10-13  Jonathan Wakely  <jwakely@redhat.com>
1294
1295         * include/bits/fs_path.h (__detail::__is_contiguous): New
1296         variable template to identify contiguous iterators.
1297         (__detail::__unified_char8_t): New alias template to decide when
1298         to treat char8_t as char without encoding conversion.
1299         (__detail::__effective_range(const basic_string<C,T>&)): Use
1300         std::char_traits<C> for returned string view.
1301         (__detail::__effective_range(const basic_string_view<C,T>&)):
1302         Likewise.
1303         (__detail::__effective_range(const Source&)): Use
1304         __is_contiguous to detect mode cases of contiguous iterators.
1305         Use __unified_char8_t to return a std::string instead of
1306         std::u8string.
1307
1308 2021-10-13  Jonathan Wakely  <jwakely@redhat.com>
1309
1310         PR libstdc++/102592
1311         * include/bits/fs_path.h (path::path(Iter, Iter, format))
1312         (path::append(Iter, Iter), path::concat(Iter, Iter)): Call
1313         __string_from_range directly, instead of two-argument overload
1314         of _S_convert.
1315         (path::_S_convert(Iter, Iter)): Remove.
1316         * testsuite/27_io/filesystem/path/construct/102592.C: New test.
1317
1318 2021-10-13  Jonathan Wakely  <jwakely@redhat.com>
1319
1320         * include/bits/c++config (__terminate): Add extern "C++".
1321
1322 2021-10-12  Jonathan Wakely  <jwakely@redhat.com>
1323
1324         * testsuite/20_util/tuple/comparison_operators/overloaded.cc:
1325         Restore test for operator<.
1326         * testsuite/20_util/tuple/comparison_operators/overloaded2.cc:
1327         Adjust expected errors for C++20.
1328
1329 2021-10-12  Jonathan Wakely  <jwakely@redhat.com>
1330
1331         PR libstdc++/101960
1332         * include/std/tuple (_Tuple_impl(_Tuple_impl&&)): Define as
1333         defauled.
1334         * testsuite/20_util/tuple/cons/101960.cc: Check tuples with
1335         array elements before the last element.
1336
1337 2021-10-12  Jonathan Wakely  <jwakely@redhat.com>
1338
1339         * include/bits/stl_iterator_base_funcs.h (__advance): Add
1340         deleted overload to improve diagnostics.
1341         (__distance): Likewise.
1342
1343 2021-10-11  Jonathan Wakely  <jwakely@redhat.com>
1344
1345         * include/bits/atomic_timed_wait.h: Remove unused header.
1346         * include/bits/c++config (std:__terminate): Define.
1347         * include/bits/semaphore_base.h: Remove <exception> and use
1348         __terminate instead of terminate.
1349         * include/bits/std_thread.h: Likewise.
1350         * libsupc++/eh_terminate.cc (std::terminate): Use qualified-id
1351         to call __cxxabiv1::__terminate.
1352
1353 2021-10-11  Jonathan Wakely  <jwakely@redhat.com>
1354
1355         * include/bits/regex.h (basic_regex::assign(Iter, Iter)): Avoid
1356         std::__to_address by using poitner directly or using base()
1357         member of __normal_iterator.
1358
1359 2021-10-11  Jonathan Wakely  <jwakely@redhat.com>
1360
1361         * testsuite/18_support/numeric_limits/lowest.cc: Use
1362         numeric_limits<T>::is_integer instead of is_integral<T>::value.
1363
1364 2021-10-11  Jonathan Wakely  <jwakely@redhat.com>
1365
1366         PR libstdc++/89927
1367         * include/bits/regex.h (basic_regex(const _Ch_type*, size_t)):
1368         Add __glibcxx_requires_string_len assertion.
1369         (basic_regex::assign(InputIterator, InputIterator)): Add
1370         __glibcxx_requires_valid_range assertion.
1371         * include/bits/regex_scanner.tcc (_Scanner::_M_advance())
1372         (_Scanner::_M_scan_normal()): Use string literal in assertions.
1373
1374 2021-10-11  Jonathan Wakely  <jwakely@redhat.com>
1375
1376         PR libstdc++/102667
1377         * include/bits/regex.h (match_result::empty()): Optimize by
1378         calling the base function directly.
1379         (match_results::end()): Check _Base_type::empty() not empty().
1380         * testsuite/28_regex/match_results/102667.C: New test.
1381
1382 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
1383
1384         PR libstdc++/98725
1385         * testsuite/18_support/numeric_limits/lowest.cc: Remove use of
1386         _GLIBCXX_USE_WCHAR_T.
1387         * testsuite/18_support/numeric_limits/min_max.cc: Replace use of
1388         _GLIBCXX_USE_WCHAR_T with checks for WCHAR_MIN and WCHAR_MAX.
1389         * testsuite/20_util/from_chars/1_neg.cc: Remove use of
1390         _GLIBCXX_USE_WCHAR_T.
1391         * testsuite/20_util/function_objects/searchers.cc: Likewise. Use
1392         char_traits<wchar_t>::length instead of wcslen.
1393         * testsuite/20_util/hash/requirements/explicit_instantiation.cc:
1394         Likewise.
1395         * testsuite/20_util/is_arithmetic/value.cc: Likewise.
1396         * testsuite/20_util/is_compound/value.cc: Likewise.
1397         * testsuite/20_util/is_floating_point/value.cc: Likewise.
1398         * testsuite/20_util/is_fundamental/value.cc: Likewise.
1399         * testsuite/20_util/is_integral/value.cc: Likewise.
1400         * testsuite/20_util/is_signed/value.cc: Likewise.
1401         * testsuite/20_util/is_unsigned/value.cc: Likewise.
1402         * testsuite/20_util/is_void/value.cc: Likewise.
1403         * testsuite/20_util/make_signed/requirements/typedefs-1.cc:
1404         Likewise.
1405         * testsuite/20_util/make_signed/requirements/typedefs-2.cc:
1406         Likewise.
1407         * testsuite/20_util/make_signed/requirements/typedefs-3.cc:
1408         Likewise.
1409         * testsuite/20_util/make_signed/requirements/typedefs-4.cc:
1410         Likewise.
1411         * testsuite/20_util/make_unsigned/requirements/typedefs-1.cc:
1412         Likewise.
1413         * testsuite/20_util/make_unsigned/requirements/typedefs-2.cc:
1414         Likewise.
1415         * testsuite/20_util/make_unsigned/requirements/typedefs-3.cc:
1416         Likewise.
1417         * testsuite/20_util/to_chars/3.cc: Likewise.
1418         * testsuite/20_util/type_identity/requirements/typedefs.cc:
1419         Likewise.
1420         * testsuite/21_strings/basic_string/hash/debug.cc: Likewise.
1421         * testsuite/21_strings/basic_string/hash/hash.cc: Likewise.
1422         * testsuite/21_strings/basic_string/literals/types-char8_t.cc:
1423         Likewise.
1424         * testsuite/21_strings/basic_string/literals/types.cc: Likewise.
1425         * testsuite/21_strings/basic_string/literals/values-char8_t.cc:
1426         Likewise.
1427         * testsuite/21_strings/basic_string/literals/values.cc:
1428         Likewise.
1429         * testsuite/21_strings/basic_string/modifiers/64422.cc:
1430         Likewise.
1431         * testsuite/21_strings/basic_string/range_access/wchar_t/1.cc:
1432         Likewise.
1433         * testsuite/21_strings/basic_string/requirements/citerators.cc:
1434         Likewise.
1435         * testsuite/21_strings/basic_string/requirements/typedefs.cc:
1436         Likewise.
1437         * testsuite/21_strings/basic_string/types/pmr_typedefs.cc:
1438         Likewise.
1439         * testsuite/21_strings/basic_string_view/literals/types-char8_t.cc:
1440         Likewise.
1441         * testsuite/21_strings/basic_string_view/literals/types.cc:
1442         Likewise.
1443         * testsuite/21_strings/basic_string_view/literals/values-char8_t.cc:
1444         Likewise.
1445         * testsuite/21_strings/basic_string_view/literals/values.cc:
1446         Likewise.
1447         * testsuite/21_strings/basic_string_view/requirements/typedefs.cc:
1448         Likewise.
1449         * testsuite/21_strings/basic_string_view/typedefs.cc: Likewise.
1450         * testsuite/21_strings/char_traits/requirements/constexpr_functions.cc:
1451         Likewise.
1452         * testsuite/21_strings/char_traits/requirements/constexpr_functions_c++17.cc:
1453         Likewise.
1454         * testsuite/21_strings/char_traits/requirements/constexpr_functions_c++20.cc:
1455         Likewise.
1456         * testsuite/22_locale/ctype/is/string/89728_neg.cc: Likewise.
1457         * testsuite/25_algorithms/fill/4.cc: Likewise.
1458         * testsuite/25_algorithms/fill_n/1.cc: Likewise.
1459         * testsuite/experimental/functional/searchers.cc: Likewise. Use
1460         char_traits<wchar_t>::length instead of wcslen.
1461         * testsuite/experimental/polymorphic_allocator/pmr_typedefs_string.cc:
1462         Likewise.
1463         * testsuite/experimental/string_view/literals/types-char8_t.cc:
1464         Likewise.
1465         * testsuite/experimental/string_view/literals/types.cc:
1466         Likewise.
1467         * testsuite/experimental/string_view/literals/values-char8_t.cc:
1468         Likewise.
1469         * testsuite/experimental/string_view/literals/values.cc:
1470         Likewise.
1471         * testsuite/experimental/string_view/range_access/wchar_t/1.cc:
1472         Likewise.
1473         * testsuite/experimental/string_view/requirements/typedefs.cc:
1474         Likewise.
1475         * testsuite/experimental/string_view/typedefs.cc: Likewise.
1476         * testsuite/ext/vstring/range_access.cc: Likewise.
1477         * testsuite/std/concepts/concepts.lang/concept.arithmetic/integral.cc:
1478         Likewise.
1479         * testsuite/std/concepts/concepts.lang/concept.arithmetic/signed_integral.cc:
1480         Likewise.
1481         * testsuite/std/concepts/concepts.lang/concept.arithmetic/unsigned_integral.cc:
1482         Likewise.
1483         * testsuite/tr1/4_metaprogramming/is_arithmetic/value.cc:
1484         Likewise.
1485         * testsuite/tr1/4_metaprogramming/is_compound/value.cc:
1486         Likewise.
1487         * testsuite/tr1/4_metaprogramming/is_floating_point/value.cc:
1488         Likewise.
1489         * testsuite/tr1/4_metaprogramming/is_fundamental/value.cc:
1490         Likewise.
1491         * testsuite/tr1/4_metaprogramming/is_integral/value.cc:
1492         Likewise.
1493         * testsuite/tr1/4_metaprogramming/is_signed/value.cc: Likewise.
1494         * testsuite/tr1/4_metaprogramming/is_unsigned/value.cc:
1495         Likewise.
1496         * testsuite/tr1/4_metaprogramming/is_void/value.cc: Likewise.
1497         * testsuite/tr1/6_containers/hash/24799.cc: Likewise.
1498
1499 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
1500
1501         PR libstdc++/98725
1502         * include/std/ostream (operator<<(basic_ostream<char, Tr>&, wchar_t))
1503         (operator<<(basic_ostream<char, Tr>&, const wchar_t*)): Always
1504         define as deleted. Do not check _GLIBCXX_USE_WCHAR_T.
1505
1506 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
1507
1508         PR libstdc++/98725
1509         * include/bits/locale_conv.h (wstring_convert, wbuffer_convert):
1510         Define unconditionally. Do not check _GLIBCXX_USE_WCHAR_T.
1511
1512 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
1513
1514         PR libstdc++/98725
1515         * include/c_global/cstddef [!_GLIBCXX_USE_WCHAR_T]
1516         (__byte_operand<wchar_t>): Define specialization.
1517         * include/std/type_traits (__make_signed<wchar_t>)
1518         (__make_unsigned<wchar_t>): Remove redundant check for
1519         __WCHAR_TYPE__ being defined.
1520         * include/tr1/type_traits [!_GLIBCXX_USE_WCHAR_T]
1521         (__is_integral_helper<wchar_t>): Likewise.
1522
1523 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
1524
1525         PR libstdc++/98725
1526         * include/ext/rc_string_base.h [!_GLIBCXX_USE_WCHAR_T]
1527         (__rc_string_base<wchar_t>): Define member function.
1528         * include/ext/vstring.h [!_GLIBCXX_USE_WCHAR_T]
1529         (hash<__gnu_cxx::__wvstring>): Define specialization.
1530         * include/ext/vstring_fwd.h [!_GLIBCXX_USE_WCHAR_T] (__wvstring)
1531         (__wsso_string, __wrc_string): Declare typedefs.
1532
1533 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
1534
1535         PR libstdc++/98725
1536         * include/bits/char_traits.h (char_traits<wchar_t>): Define
1537         explicit specialization unconditionally.
1538         * include/bits/basic_string.h (hash<wstring>): Define
1539         unconditionally. Do not check _GLIBCXX_USE_WCHAR_T.
1540         * include/bits/stringfwd.h (wstring): Likewise.
1541         * include/debug/string (wstring): Likewise.
1542         * include/experimental/string_view (experimental::wstring_view)
1543         (hash<experimental::wstring_view>): Likewise.
1544         * include/std/string (pmr::wstring, hash<pmr::wstring>):
1545         Likewise.
1546         * include/std/string_view (wstring_view, hash<wstring_view>):
1547         Likewise.
1548
1549 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
1550
1551         * testsuite/27_io/basic_filebuf/close/81256.cc: Moved to...
1552         * testsuite/27_io/basic_filebuf/close/wchar_t/81256.cc: ...here.
1553
1554 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
1555
1556         * testsuite/22_locale/conversions/buffer/1.cc: Check
1557         _GLIBCXX_USE_WCHAR_T.
1558         * testsuite/22_locale/conversions/buffer/3.cc: Likewise. Add
1559         test using char16_t.
1560         * testsuite/22_locale/conversions/string/1.cc: Check
1561         _GLIBCXX_USE_WCHAR_T.
1562         * testsuite/27_io/filesystem/path/generic/generic_string.cc:
1563         Likewise.
1564         * testsuite/27_io/filesystem/path/modifiers/make_preferred.cc:
1565         Likewise.
1566         * testsuite/27_io/filesystem/path/native/alloc.cc: Likewise.
1567         * testsuite/27_io/filesystem/path/native/string-char8_t.cc:
1568         Likewise.
1569         * testsuite/27_io/filesystem/path/native/string.cc: Likewise.
1570         * testsuite/28_regex/algorithms/regex_match/extended/wstring_locale.cc:
1571         Likewise.
1572         * testsuite/experimental/filesystem/path/generic/generic_string.cc:
1573         Likewise.
1574         * testsuite/experimental/filesystem/path/native/alloc.cc:
1575         Likewise.
1576         * testsuite/experimental/filesystem/path/native/string-char8_t.cc:
1577         Likewise.
1578         * testsuite/experimental/filesystem/path/native/string.cc:
1579         Likewise.
1580
1581 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
1582
1583         * testsuite/26_numerics/bit/bit.rotate/rotr.cc:
1584         * testsuite/util/testsuite_common_types.h:
1585
1586 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
1587
1588         * testsuite/18_support/numeric_limits/40856.cc: Replace use of
1589         _GLIBCXX_USE_INT128.
1590         * testsuite/18_support/numeric_limits/dr559.cc: Likewise.
1591         * testsuite/18_support/numeric_limits/lowest.cc: Likewise.
1592         * testsuite/18_support/numeric_limits/max_digits10.cc: Likewise.
1593         * testsuite/20_util/is_floating_point/value.cc: Likewise.
1594         * testsuite/20_util/is_integral/value.cc: Likewise.
1595         * testsuite/20_util/is_signed/value.cc: Likewise.
1596         * testsuite/20_util/is_unsigned/value.cc: Likewise.
1597         * testsuite/20_util/make_signed/requirements/typedefs-1.cc:
1598         Likewise.
1599         * testsuite/20_util/make_signed/requirements/typedefs-2.cc:
1600         Likewise.
1601         * testsuite/20_util/make_unsigned/requirements/typedefs-1.cc:
1602         Likewise.
1603         * testsuite/20_util/make_unsigned/requirements/typedefs-2.cc:
1604         Likewise.
1605         * testsuite/20_util/type_identity/requirements/typedefs.cc:
1606         Likewise.
1607         * testsuite/26_numerics/bit/bit.count/countl_one.cc: Likewise.
1608         * testsuite/26_numerics/bit/bit.count/countl_zero.cc: Likewise.
1609         * testsuite/26_numerics/bit/bit.count/countr_one.cc: Likewise.
1610         * testsuite/26_numerics/bit/bit.count/countr_zero.cc: Likewise.
1611         * testsuite/26_numerics/bit/bit.count/popcount.cc: Likewise.
1612         * testsuite/26_numerics/bit/bit.pow.two/bit_ceil.cc: Likewise.
1613         * testsuite/26_numerics/bit/bit.pow.two/bit_floor.cc: Likewise.
1614         * testsuite/26_numerics/bit/bit.pow.two/bit_width.cc: Likewise.
1615         * testsuite/26_numerics/bit/bit.pow.two/has_single_bit.cc:
1616         Likewise.
1617         * testsuite/26_numerics/bit/bit.rotate/rotl.cc: Likewise.
1618
1619 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
1620
1621         * include/bits/hashtable_policy.h (_Select1st): Replace use of
1622         std::get.
1623         (_Select2nd): Remove.
1624         (_NodeBuilder::_S_build): Use _NodeGenerator::__node_type
1625         typedef instead of deducing it. Remove unnecessary piecewise
1626         construction.
1627         (_ReuseOrAllocNode): Make __node_type public.
1628         (_Map_base): Adjust partial specialization to be able to extract
1629         the mapped_type without using tuple_element.
1630         (_Map_base::at): Define inline
1631         * testsuite/23_containers/unordered_map/requirements/53339.cc:
1632         Remove XFAIL.
1633         * testsuite/23_containers/unordered_multimap/requirements/53339.cc:
1634         Likewise.
1635
1636 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
1637
1638         * include/bits/hashtable.h: Move static assertion to destructor.
1639         * include/bits/hashtable_policy.h: Deduce value type from node
1640         type without instantiating it.
1641
1642 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
1643
1644         * src/c++11/limits.cc: Fail if __cpp_inline_variables is
1645         defined.
1646
1647 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
1648
1649         PR libstdc++/92546
1650         * include/bits/ranges_algobase.h: Replace <iterator> with a
1651         subset of the headers it includes.
1652
1653 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
1654
1655         * include/experimental/deque (erase, erase_if): Revert changes
1656         to avoid debug mode overhead.
1657         * include/experimental/map (erase, erase_if): Likewise.
1658         * include/experimental/set (erase, erase_if): Likewise.
1659         * include/experimental/unordered_map (erase, erase_if):
1660         Likewise.
1661         * include/experimental/unordered_set (erase, erase_if):
1662         Likewise.
1663         * include/experimental/vector (erase, erase_if): Likewise.
1664         * include/std/deque (erase, erase_if): Likewise.
1665         * include/std/map (erase, erase_if): Likewise.
1666         * include/std/set (erase, erase_if): Likewise.
1667         * include/std/unordered_map (erase, erase_if): Likewise.
1668         * include/std/unordered_set (erase, erase_if): Likewise.
1669         * include/std/vector (erase, erase_if): Likewise.
1670
1671 2021-10-08  Jonathan Wakely  <jwakely@redhat.com>
1672
1673         * include/std/chrono (__detail::__units_suffix_misc): New
1674         helper function.
1675         (__detail::__units_suffix): Likewise.
1676         (chrono::operator<<(basic_ostream&, const duration&)): Define.
1677         * testsuite/20_util/duration/io.cc: New test.
1678
1679 2021-10-07  Jonathan Wakely  <jwakely@redhat.com>
1680
1681         * include/Makefile.am: Add new header.
1682         * include/Makefile.in: Regenerate.
1683         * include/std/chrono (duration, time_point, system_clock)
1684         (steady_clock, high_resolution_clock, chrono_literals, sys_time)
1685         (file_clock, file_time): Move to ...
1686         * include/bits/chrono.h: New file.
1687         * include/bits/atomic_futex.h: Include new header instead of
1688         <chrono>.
1689         * include/bits/atomic_timed_wait.h: Likewise.
1690         * include/bits/fs_fwd.h: Likewise.
1691         * include/bits/semaphore_base.h: Likewise.
1692         * include/bits/this_thread_sleep.h: Likewise.
1693         * include/bits/unique_lock.h: Likewise.
1694         * include/experimental/bits/fs_fwd.h: Likewise.
1695         * include/experimental/chrono: Likewise.
1696         * include/experimental/io_context: Likewise.
1697         * include/experimental/netfwd: Likewise.
1698         * include/experimental/timer: Likewise.
1699         * include/std/condition_variable: Likewise.
1700         * include/std/mutex: Likewise.
1701         * include/std/shared_mutex: Likewise.
1702
1703 2021-10-07  Jonathan Wakely  <jwakely@redhat.com>
1704
1705         PR libstdc++/102377
1706         * include/bits/atomic_wait.h (__waiter_pool_base:_S_align):
1707         Hardcode to 64 instead of using non-constant constant.
1708
1709 2021-10-07  Jonathan Wakely  <jwakely@redhat.com>
1710
1711         * include/bits/erase_if.h (__erase_nodes_if): Remove redundant
1712         __niter_base calls.
1713         * include/std/string (erase, erase_if): Likewise.
1714         * include/std/deque (erase, erase_if): Access non-debug
1715         container directly.
1716         * include/std/map (erase, erase_if): Likewise.
1717         * include/std/set (erase, erase_if): Likewise.
1718         * include/std/unordered_map (erase, erase_if): Likewise.
1719         * include/std/unordered_set (erase, erase_if): Likewise.
1720         * include/std/vector (erase, erase_if): Likewise.
1721         * include/experimental/deque (erase, erase_if): Likewise.
1722         * include/experimental/map (erase, erase_if): Likewise.
1723         * include/experimental/set (erase, erase_if): Likewise.
1724         * include/experimental/unordered_map (erase, erase_if):
1725         Likewise.
1726         * include/experimental/unordered_set (erase, erase_if):
1727         Likewise.
1728         * include/experimental/vector (erase, erase_if): Likewise.
1729
1730 2021-10-06  Jonathan Wakely  <jwakely@redhat.com>
1731
1732         * include/Makefile.am: Add new headers.
1733         * include/Makefile.in: Regenerate.
1734         * include/std/functional: Include <bits/move_only_function.h>.
1735         * include/std/version (__cpp_lib_move_only_function): Define.
1736         * include/bits/mofunc_impl.h: New file.
1737         * include/bits/move_only_function.h: New file.
1738         * testsuite/20_util/move_only_function/call.cc: New test.
1739         * testsuite/20_util/move_only_function/cons.cc: New test.
1740         * testsuite/20_util/move_only_function/move.cc: New test.
1741         * testsuite/20_util/move_only_function/version.cc: New test.
1742
1743 2021-10-05  Jonathan Wakely  <jwakely@redhat.com>
1744
1745         * testsuite/21_strings/basic_string_view/requirements/trivially_copyable.cc:
1746         New test.
1747         * testsuite/23_containers/span/trivially_copyable.cc: New test.
1748
1749 2021-10-05  Jonathan Wakely  <jwakely@redhat.com>
1750
1751         * include/bits/utility.h (__is_in_place_type_v): Define
1752         variable template to detect in_place_type_t specializations.
1753         (__is_in_place_type): Replace class template with alias
1754         template using __is_in_place_type_v.
1755         * include/std/any (any(T&&)): Check __is_in_place_type first and
1756         avoid instantiating is_copy_constructible unnecessarily.
1757
1758 2021-10-05  Jonathan Wakely  <jwakely@redhat.com>
1759
1760         * testsuite/20_util/integer_comparisons/greater.cc: New test.
1761
1762 2021-10-05  Jonathan Wakely  <jwakely@redhat.com>
1763
1764         * testsuite/27_io/basic_ostream/inserters_other/char/volatile_ptr.cc:
1765         Check result matches non-volatile pointer.
1766
1767 2021-10-05  Jonathan Wakely  <jwakely@redhat.com>
1768
1769         PR c++/102535
1770         * testsuite/20_util/is_trivially_constructible/value.cc: Adjust
1771         expected value for C++20.
1772
1773 2021-10-05  Jonathan Wakely  <jwakely@redhat.com>
1774
1775         * include/bits/std_function.h (_Any_data::_M_access): Add
1776         noexcept.
1777         (_Function_base::_Base_manager::_M_get_pointer): Likewise.
1778         (_Function_base::_Base_manager::_M_not_empty_function):
1779         Likewise.
1780
1781 2021-10-05  Jonathan Wakely  <jwakely@redhat.com>
1782
1783         * include/std/ostream (operator<<(const volatile void*)):
1784         Add new overload, as per P1147R1.
1785         * testsuite/27_io/basic_ostream/inserters_other/char/volatile_ptr.cc:
1786         New test.
1787
1788 2021-10-05  Jonathan Wakely  <jwakely@redhat.com>
1789
1790         * include/bits/stl_queue.h
1791         (__cpp_lib_adaptor_iterator_pair_constructor): Set to correct
1792         value.
1793         * include/bits/stl_stack.h
1794         (__cpp_lib_adaptor_iterator_pair_constructor): Likewise.
1795         * include/std/version
1796         (__cpp_lib_adaptor_iterator_pair_constructor): Likewise.
1797         * testsuite/23_containers/queue/cons_from_iters.cc: Update
1798         expected value.
1799         * testsuite/23_containers/stack/cons_from_iters.cc: Likewise.
1800
1801 2021-10-04  Jonathan Wakely  <jwakely@redhat.com>
1802
1803         * include/bits/forward_list.h (forward_list): Use non-deduced
1804         context for allocator parameter of allocator-extended copy and
1805         move constructors.
1806         * include/bits/stl_bvector.h (vector<bool>): Likewise.
1807         * include/bits/stl_deque.h (deque): Likewise.
1808         * include/bits/stl_list.h (list): Likewise.
1809         * include/bits/stl_map.h (map): Likewise.
1810         * include/bits/stl_multimap.h (multimap): Likewise.
1811         * include/bits/stl_multiset.h (multiset): Likewise.
1812         * include/bits/stl_set.h (set): Likewise.
1813         * include/bits/stl_vector.h (vector): Likewise.
1814         * include/bits/stl_queue.h (queue, priority_queue): Do not
1815         constrain Allocator template parameter of deduction guides that
1816         have a Container parameter.
1817         * include/bits/stl_stack.h (stack): Likewise.
1818         * include/debug/deque (__gnu_debug::deque): Use non-deduced
1819         context for allocator parameter of allocator-extended copy and
1820         move constructors.
1821         * include/debug/list (__gnu_debug::list): Likewise.
1822         * include/debug/map.h (__gnu_debug::map): Likewise.
1823         * include/debug/multimap.h (__gnu_debug::multimap): Likewise.
1824         * include/debug/multiset.h (__gnu_debug::multiset): Likewise.
1825         * include/debug/set.h (__gnu_debug::set): Likewise.
1826         * include/debug/vector (__gnu_debug::vector): Likewise.
1827         * testsuite/23_containers/deque/cons/deduction.cc: Test class
1828         template argument deduction with non-deduced allocator
1829         arguments.
1830         * testsuite/23_containers/forward_list/cons/deduction.cc:
1831         Likewise.
1832         * testsuite/23_containers/list/cons/deduction.cc: Likewise.
1833         * testsuite/23_containers/map/cons/deduction.cc: Likewise.
1834         * testsuite/23_containers/multimap/cons/deduction.cc: Likewise.
1835         * testsuite/23_containers/multiset/cons/deduction.cc: Likewise.
1836         * testsuite/23_containers/priority_queue/deduction.cc: Likewise.
1837         * testsuite/23_containers/queue/deduction.cc: Likewise.
1838         * testsuite/23_containers/set/cons/deduction.cc: Likewise.
1839         * testsuite/23_containers/stack/deduction.cc: Likewise.
1840         * testsuite/23_containers/unordered_map/cons/deduction.cc:
1841         Likewise.
1842         * testsuite/23_containers/unordered_multimap/cons/deduction.cc:
1843         Likewise.
1844         * testsuite/23_containers/unordered_multiset/cons/deduction.cc:
1845         Likewise.
1846         * testsuite/23_containers/unordered_set/cons/deduction.cc:
1847         Likewise.
1848         * testsuite/23_containers/vector/cons/deduction.cc: Likewise.
1849
1850 2021-10-04  Jonathan Wakely  <jwakely@redhat.com>
1851
1852         * include/std/variant (__detail::__variant::__as): Add missing
1853         noexcept to first overload.
1854
1855 2021-10-04  Jonathan Wakely  <jwakely@redhat.com>
1856
1857         * include/bits/basic_string.h (basic_string(nullptr_t)): Define
1858         as deleted.
1859         (operator=(nullptr_t)): Likewise.
1860         * include/bits/cow_string.h (basic_string(nullptr_t)): Likewise.
1861         (operator=(nullptr_t)): Likewise.
1862         * include/std/string_view (basic_string_view(nullptr_t)):
1863         Likewise.
1864         * testsuite/21_strings/basic_string/cons/char/nullptr.cc: New test.
1865         * testsuite/21_strings/basic_string_view/cons/char/nonnull.cc:
1866         Change dg-warning to dg-error.
1867         * testsuite/21_strings/basic_string_view/cons/wchar_t/nonnull.cc:
1868         Likewise.
1869
1870 2021-10-02  Jonathan Wakely  <jwakely@redhat.com>
1871
1872         * src/c++17/fs_ops.cc (create_directory): Fix typo in enum name.
1873         * src/filesystem/ops-common.h (__last_system_error): Add
1874         explicit cast to avoid narrowing conversion.
1875         (do_space): Fix type in function name.
1876
1877 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1878
1879         PR libstdc++/102100
1880         * include/Makefile.am (c++config.h): Define
1881         _GLIBCXX_VERBOSE_ASSERT based on configure output.
1882         * include/Makefile.in: Regenerate.
1883         * include/bits/c++config: Fix condition for verbose assertions.
1884
1885 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1886
1887         PR libstdc++/92546
1888         * include/bits/erase_if.h (__erase_nodes_if): Use __niter_base to
1889         unwrap debug iterators.
1890         * include/bits/refwrap.h: Do not error if included in C++03.
1891         * include/bits/stl_algo.h (__remove_if): Move to ...
1892         * include/bits/stl_algobase.h (__remove_if): ... here.
1893         * include/std/deque (erase, erase_if): Use __remove_if instead of
1894         remove and remove_if.
1895         * include/std/string (erase, erase_if): Likewise.
1896         * include/std/vector (erase, erase_if): Likewise.
1897
1898 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1899
1900         PR libstdc++/66742
1901         * include/bits/list.tcc (list::sort()): Use _Scratch_list
1902         objects for splicing and merging.
1903         (list::sort(StrictWeakOrdering)): Likewise.
1904         * include/bits/stl_list.h (__detail::_Scratch_list): New type.
1905         * src/c++98/list.cc (_List_node_base::_M_transfer): Add
1906         assertion for --enable-libstdcxx-debug library.
1907         * testsuite/23_containers/list/operations/66742.cc: New test.
1908
1909 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1910
1911         PR libstdc++/100612
1912         * include/std/thread (__pmf_expects_stop_token): New variable
1913         template to detect a pointer to member function that needs a
1914         stop_token to be added to the arguments.
1915         (jthread::__S_create): Use __pmf_expects_stop_token.
1916         (jthread::__S_create_pmf): New function.
1917         * testsuite/30_threads/jthread/100612.cc: New test.
1918
1919 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1920
1921         * include/bits/stl_queue.h
1922         (__cpp_lib_adaptor_iterator_pair_constructor): Define for C++23, as
1923         per P1425R4.
1924         (queue(InputIterator, InputIterator)): Likewise.
1925         (queue(InputIterator, InputIterator, const Alloc&)): Likewise.
1926         * include/bits/stl_stack.h
1927         (__cpp_lib_adaptor_iterator_pair_constructor): Likewise.
1928         (stack(InputIterator, InputIterator)): Likewise.
1929         (stack(InputIterator, InputIterator, const Alloc&)): Likewise.
1930         * include/std/version (__cpp_lib_adaptor_iterator_pair_constructor):
1931         Define.
1932         * testsuite/23_containers/queue/cons_from_iters.cc: New test.
1933         * testsuite/23_containers/stack/cons_from_iters.cc: New test.
1934
1935 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1936
1937         * include/bits/stl_queue.h (priority_queue): Add
1938         allocator-extended overloads for constructors taking iterator.
1939         * testsuite/23_containers/priority_queue/lwg3506.cc: New test.
1940
1941 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1942
1943         * include/bits/stl_queue.h (priority_queue): Construct sequence
1944         from iterators when no sequence argument is present (LWG 3529).
1945         * testsuite/23_containers/priority_queue/lwg3529.cc: New test.
1946
1947 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1948
1949         * include/bits/stl_queue.h (priority_queue): Constrain
1950         constructors with InputIterator parameters (LWG 3522).
1951         * testsuite/23_containers/priority_queue/lwg3522.cc: New test.
1952
1953 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1954
1955         * include/bits/ranges_base.h (ranges::distance): Split overload
1956         into two (LWG 3392).
1957         * testsuite/24_iterators/range_operations/lwg3392.cc: New test.
1958
1959 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1960
1961         * testsuite/30_threads/thread/cons/3.cc: Remove derivation from
1962         std::unary_function.
1963         * testsuite/30_threads/thread/cons/4.cc: Likewise.
1964         * testsuite/30_threads/thread/cons/5.cc: Likewise.
1965
1966 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1967
1968         * testsuite/ext/pb_ds/example/basic_multimap.cc: Remove
1969         unnecesary derivation from std::unary_function.
1970         * testsuite/ext/pb_ds/example/erase_if.cc: Likewise.
1971         * testsuite/ext/pb_ds/example/hash_illegal_resize.cc: Likewise.
1972         * testsuite/ext/pb_ds/example/hash_initial_size.cc: Likewise.
1973         * testsuite/ext/pb_ds/example/hash_load_set_change.cc: Likewise.
1974         * testsuite/ext/pb_ds/example/hash_mod.cc: Likewise.
1975         * testsuite/ext/pb_ds/example/hash_resize.cc: Likewise.
1976         * testsuite/ext/pb_ds/example/hash_shift_mask.cc: Likewise.
1977         * testsuite/ext/pb_ds/example/priority_queue_dijkstra.cc:
1978         Likewise.
1979         * testsuite/ext/pb_ds/example/ranged_hash.cc: Likewise.
1980         * testsuite/ext/pb_ds/example/store_hash.cc: Likewise.
1981
1982 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1983
1984         * src/c++11/functexcept.cc (__throw_out_of_range_fmt): Do not
1985         expand the format string for freestanding, or non-vebose, or if
1986         we're just going to abort anyway.
1987         * src/c++11/snprintf_lite.cc: Remove unused header and
1988         declaration.
1989
1990 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1991
1992         * include/std/variant (__do_visit): Use variant_npos instead of
1993         literal -1 that requires a narrowing conversion.
1994
1995 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
1996
1997         PR libstdc++/99327
1998         * src/filesystem/ops-common.h (__unsupported): New function to
1999         return a suitable error code for missing functionality.
2000         (posix::off_t): New typedef.
2001         (posix::*): Set errno to ENOSYS instead of ENOTSUP for no-op
2002         fallback implementations.
2003         (do_copy_file): Replace uses of errc::not_supported.
2004         * src/c++17/fs_ops.cc (fs::copy, fs::copy_file, create_dir)
2005         (fs::create_directory, fs::create_directory_symlink)
2006         (fs::create_hard_link, fs::create_symlink, fs::current_path)
2007         (fs::equivalent, do_stat, fs::file_size, fs::hard_link_count)
2008         (fs::last_write_time, fs::permissions, fs::read_symlink):
2009         Replace uses of errc::not_supported.
2010         (fs::resize_file): Qualify off_t.
2011         * src/filesystem/ops.cc (fs::copy, fs::copy_file, create_dir)
2012         (fs::create_directory, fs::create_directory_symlink)
2013         (fs::create_hard_link, fs::create_symlink, fs::current_path)
2014         (fs::equivalent, do_stat, fs::file_size, fs::last_write_time)
2015         (fs::permissions, fs::read_symlink, fs::system_complete):
2016         Replace uses of errc::not_supported.
2017         (fs::resize_file): Qualify off_t and enable unconditionally.
2018         * testsuite/19_diagnostics/system_error/cons-1.cc: Likewise.
2019
2020 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
2021
2022         * src/filesystem/ops-common.h (last_error): New helper function.
2023         (filesystem::do_space): Use last_error().
2024         * src/c++17/fs_ops.cc (fs::absolute, fs::create_hard_link)
2025         (fs::equivalent, fs::remove, fs::temp_directory_path): Use
2026         last_error().
2027         * src/filesystem/ops.cc (fs::create_hard_link)
2028         (fs::remove, fs::temp_directory_path): Likewise.
2029
2030 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
2031
2032         * include/std/type_traits (__conditional): New class template
2033         for internal uses of std::conditional.
2034         (__conditional_t): New alias template to replace conditional_t.
2035         (__and_, __or_, __result_of_memfun, __result_of_memobj): Use
2036         __conditional_t instead of conditional::type.
2037         * include/bits/atomic_base.h (__atomic_impl::_Diff): Likewise.
2038         * include/bits/hashtable.h (_Hashtable): Likewise.
2039         * include/bits/hashtable_policy.h (_Node_iterator, _Insert_base)
2040         (_Local_iterator): Likewise. Replace typedefs with
2041         using-declarations.
2042         * include/bits/move.h (move_if_noexcept): Use __conditional_t.
2043         * include/bits/parse_numbers.h (_Select_int_base): Likewise.
2044         * include/bits/ptr_traits.h (__make_not_void): Likewise.
2045         * include/bits/ranges_algobase.h (__copy_or_move_backward)
2046         (__copy_or_move): Likewise.
2047         * include/bits/ranges_base.h (borrowed_iterator_t): Likewise.
2048         * include/bits/ranges_util.h (borrowed_subrange_t): Likewise.
2049         * include/bits/regex_compiler.h (_BracketMatcher): Use
2050         __conditional_t. Replace typedefs with using-declarations.
2051         * include/bits/shared_ptr_base.h (__shared_count): Use
2052         __conditional_t.
2053         * include/bits/stl_algobase.h (__copy_move, __copy_move_backward):
2054         Likewise.
2055         * include/bits/stl_iterator.h (__detail::__clamp_iter_cat)
2056         (reverse_iterator::iterator_concept)
2057         (__make_move_if_noexcept_iterator)
2058         (iterator_traits<common_iterator<_It, _Sent>>)
2059         (iterator_traits<counted_iterator<_It>>): Likewise.
2060         * include/bits/stl_pair.h (_PCC, pair::operator=): Likewise.
2061         * include/bits/stl_tree.h (_Rb_tree::insert_return_type)
2062         (_Rb_tree::_M_clone_node): Likewise.
2063         * include/bits/unique_ptr.h (unique_ptr(unique_ptr<U,E>&&)):
2064         Likewise.
2065         * include/bits/uses_allocator.h (__uses_alloc): Likewise.
2066         (__is_uses_allocator_predicate): Likewise.
2067         * include/debug/functions.h (__foreign_iterator_aux2): Likewise.
2068         * include/experimental/any (any::_Manager, __any_caster):
2069         Likewise.
2070         * include/experimental/executor (async_completion): Likewise.
2071         * include/experimental/functional (__boyer_moore_base_t):
2072         Likewise.
2073         * include/std/any (any::_Manager): Likewise.
2074         * include/std/functional (__boyer_moore_base_t): Likewise.
2075         * include/std/ranges (borrowed_iterator_t)
2076         (borrowed_subrange_t, __detail::__maybe_present_t)
2077         (__detail::__maybe_const_t, split_view): Likewise.
2078         * include/std/tuple (__empty_not_final, tuple::operator=):
2079         Likewise.
2080         * include/std/variant (__detail::__variant::__get_t): Likewise.
2081
2082 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
2083
2084         PR libstdc++/78113
2085         * include/std/variant (__do_visit): Use a switch when we have a
2086         single variant with a small number of alternatives.
2087
2088 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
2089
2090         PR libstdc++/90943
2091         * include/std/variant (__cpp_lib_variant): Update value.
2092         (__detail::__variant::__as): New helpers implementing the
2093         as-variant exposition-only function templates.
2094         (visit, visit<R>): Use __as to upcast the variant parameters.
2095         * include/std/version (__cpp_lib_variant): Update value.
2096         * testsuite/20_util/variant/visit_inherited.cc: New test.
2097
2098 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
2099
2100         * include/bits/stl_iterator.h (__normal_iterator): Simplify
2101         converting constructor and do not require _Container::pointer.
2102
2103 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
2104
2105         * include/bits/cow_string.h [_GLIBCXX_FULLY_DYNAMIC_STRING]
2106         (basic_string(basic_string&&)): Add noexcept and avoid
2107         allocation, by sharing rep with the rvalue string.
2108
2109 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
2110
2111         * include/bits/stl_iterator.h (common_iterator::__arrow_proxy)
2112         (common_iterator::__postfix_proxy): Add noexcept.
2113
2114 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
2115
2116         PR libstdc++/94418
2117         * include/bits/stl_iterator.h (reverse_iterator): Use
2118         conditional noexcept on constructors and assignment operators.
2119         * testsuite/24_iterators/reverse_iterator/noexcept.cc: New test.
2120
2121 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
2122
2123         PR libstdc++/100153
2124         * include/bits/vector.tcc (vector<bool>::_M_shrink_to_fit()):
2125         When size() is zero just deallocate and reset.
2126
2127 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
2128
2129         PR libstdc++/96733
2130         * include/bits/stl_algo.h (clamp): Use std::min and std::max.
2131
2132 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
2133
2134         * include/bits/regex.h (basic_regex::multiline): Define for
2135         non-strict C++11 and C++14 modes.
2136         * include/bits/regex_constants.h (regex_constants::multiline):
2137         Add _GLIBCXX_RESOLVE_LIB_DEFECTS comment.
2138
2139 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
2140
2141         * testsuite/25_algorithms/is_permutation/2.cc: Include <iterator>.
2142
2143 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
2144
2145         * include/bits/stream_iterator.h (istream_iterator): Add
2146         noexcept to constructors and non-throwing member functions and
2147         friend functions.
2148         (ostream_iterator): Likewise.
2149
2150 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
2151
2152         * include/bits/boost_concept_check.h (_Is_vector_bool_iterator):
2153         New trait to identify vector<bool> iterators, including debug
2154         ones.
2155         (_ForwardIteratorReferenceConcept): Add default template
2156         argument using _Is_vector_bool_iterator and use it in partial
2157         specialization for the vector<bool> cases.
2158         (_Mutable_ForwardIteratorReferenceConcept): Likewise.
2159         * testsuite/24_iterators/operations/prev_neg.cc: Adjust dg-error
2160         line number.
2161
2162 2021-10-01  Jonathan Wakely  <jwakely@redhat.com>
2163
2164         * include/bits/list.tcc (list::merge): Remove call to size() and
2165         try-catch block. Use _Finalize_merge instead.
2166         * include/bits/stl_list.h (list::_Finalize_merge): New
2167         scope guard type to update _M_size members after a merge.
2168
2169 2021-09-30  Jonathan Wakely  <jwakely@redhat.com>
2170
2171         * include/bits/regex.h (basic_regex::multiline): Fix #if
2172         condition.
2173
2174 2021-09-29  Jonathan Wakely  <jwakely@redhat.com>
2175
2176         * include/bits/regex.h (basic_regex::multiline): Define constant
2177         for C++17.
2178         * include/bits/regex_constants.h (regex_constants::multiline):
2179         Define constant for C++17.
2180         (regex_constants::__multiline): Define duplicate constant for
2181         internal use in C++11 and C++14.
2182         * include/bits/regex_executor.h (_Executor::_M_match_multiline()):
2183         New member function.
2184         (_Executor::_M_is_line_terminator(_CharT)): New member function.
2185         (_Executor::_M_at_begin(), _Executor::_M_at_end()): Use new
2186         member functions to support multiline matches.
2187         * testsuite/28_regex/algorithms/regex_match/multiline.cc: New test.
2188
2189 2021-09-29  Jonathan Wakely  <jwakely@redhat.com>
2190
2191         * include/bits/regex_compiler.h (_Compiler::_S_validate): New
2192         function.
2193         * include/bits/regex_compiler.tcc (_Compiler::_Compiler): Use
2194         _S_validate to check flags.
2195         * include/bits/regex_error.h (_S_grammar): New error code for
2196         internal use.
2197         * testsuite/28_regex/basic_regex/ctors/grammar.cc: New test.
2198
2199 2021-09-29  Jonathan Wakely  <jwakely@redhat.com>
2200
2201         PR libstdc++/84110
2202         * include/bits/regex_error.h (regex_constants::_S_null): New
2203         error code for internal use.
2204         * include/bits/regex_scanner.tcc (_Scanner::_M_scan_normal()):
2205         Check for null character.
2206         * testsuite/28_regex/basic_regex/84110.cc: New test.
2207
2208 2021-09-29  Jonathan Wakely  <jwakely@redhat.com>
2209
2210         * include/bits/regex.h (__detail::__is_contiguous_iter): Move
2211         here from <bits/regex_compiler.h>.
2212         (basic_regex::_M_compile): New function to compile an NFA from
2213         a regular expression string.
2214         (basic_regex::basic_regex): Use _M_compile instead of delegating
2215         to other constructors.
2216         (basic_regex::operator=(const basic_regex&)): Define as
2217         defaulted.
2218         (basic_regex::operator=(initializer_list<C>)): Use _M_compile.
2219         (basic_regex::assign(const basic_regex&)): Use copy assignment.
2220         (basic_regex::assign(basic_regex&&)): Use move assignment.
2221         (basic_regex::assign(const C*, flag_type)): Use _M_compile
2222         instead of constructing a temporary string.
2223         (basic_regex::assign(const C*, size_t, flag_type)): Likewise.
2224         (basic_regex::assign(const basic_string<C,T,A>&, flag_type)):
2225         Use _M_compile instead of constructing a temporary basic_regex.
2226         (basic_regex::assign(InputIter, InputIter, flag_type)): Avoid
2227         constructing a temporary string for contiguous iterators of the
2228         right value type.
2229         * include/bits/regex_compiler.h (__is_contiguous_iter): Move to
2230         <bits/regex.h>.
2231         (__enable_if_contiguous_iter, __disable_if_contiguous_iter)
2232         (__compile_nfa): Remove.
2233         * testsuite/28_regex/basic_regex/assign/exception_safety.cc: New
2234         test.
2235         * testsuite/28_regex/basic_regex/ctors/char/other.cc: New test.
2236
2237 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
2238
2239         * include/bits/atomic_timed_wait.h (__platform_wait_until_impl):
2240         Return false for ETIMEDOUT and true otherwise.
2241
2242 2021-09-28  François Dumont  <fdumont@gcc.gnu.org>
2243
2244         * testsuite/20_util/default_delete/48631_neg.cc: Adapt dg-prune-output message
2245         to also match message with '__8' in it.
2246
2247 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
2248
2249         * include/bits/regex_automaton.h (_NFA_base::_SizeT): Remove.
2250         * include/bits/regex_compiler.h (_Compiler::_IterT): Remove.
2251         * include/bits/regex_compiler.tcc: Likewise.
2252         * include/bits/regex_scanner.h (_Scanner::_IterT): Remove.
2253         * include/bits/regex_scanner.tcc: Likewise.
2254
2255 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
2256
2257         * include/bits/regex_compiler.tcc: Add line break in empty while
2258         statement.
2259         * include/bits/regex_executor.tcc: Avoid unused parameter
2260         warning.
2261
2262 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
2263
2264         * include/bits/regex.h (basic_regex, swap): Add noexcept to
2265         non-throwing functions.
2266         * include/bits/regex_automaton.h (_State_base, _State)
2267         (_NFA_base): Likewise.
2268         * include/bits/regex_compiler.h (_Compiler): Likewise.
2269         * include/bits/regex_error.h (regex_error::code()): Likewise.
2270         * include/bits/regex_scanner.h (_Scanner): Likewise.
2271
2272 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
2273
2274         * include/bits/atomic_wait.h (_GLIBCXX_HAVE_PLATFORM_WAIT):
2275         Define before first attempt to check it.
2276
2277 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
2278
2279         * testsuite/23_containers/priority_queue/requirements/explicit_instantiation/1.cc:
2280         Do not check non-default constructible sequences when
2281         _GLIBCXX_CONCEPT_CHECKS is defined.
2282         * testsuite/23_containers/priority_queue/requirements/explicit_instantiation/1_c++98.cc:
2283         Likewise.
2284         * testsuite/23_containers/queue/requirements/explicit_instantiation/1.cc:
2285         Likewise.
2286         * testsuite/23_containers/queue/requirements/explicit_instantiation/1_c++98.cc:
2287         Likewise.
2288         * testsuite/23_containers/stack/requirements/explicit_instantiation/1.cc:
2289         Likewise.
2290         * testsuite/23_containers/stack/requirements/explicit_instantiation/1_c++98.cc:
2291         Likewise.
2292
2293 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
2294
2295         * testsuite/23_containers/deque/requirements/explicit_instantiation/3.cc:
2296         Do not test implicit allocator rebinding when _GLIBCXX_CONCEPT_CHECKS
2297         is defined.
2298         * testsuite/23_containers/forward_list/requirements/explicit_instantiation/3.cc:
2299         Likewise.
2300         * testsuite/23_containers/list/requirements/explicit_instantiation/3.cc:
2301         Likewise.
2302         * testsuite/23_containers/list/requirements/explicit_instantiation/5.cc:
2303         Likewise.
2304         * testsuite/23_containers/map/requirements/explicit_instantiation/3.cc:
2305         Likewise.
2306         * testsuite/23_containers/map/requirements/explicit_instantiation/5.cc:
2307         Likewise.
2308         * testsuite/23_containers/multimap/requirements/explicit_instantiation/3.cc:
2309         Likewise.
2310         * testsuite/23_containers/multimap/requirements/explicit_instantiation/5.cc:
2311         Likewise.
2312         * testsuite/23_containers/multiset/requirements/explicit_instantiation/3.cc:
2313         Likewise.
2314         * testsuite/23_containers/multiset/requirements/explicit_instantiation/5.cc:
2315         Likewise.
2316         * testsuite/23_containers/set/requirements/explicit_instantiation/3.cc:
2317         Likewise.
2318         * testsuite/23_containers/set/requirements/explicit_instantiation/5.cc:
2319         Likewise.
2320         * testsuite/23_containers/unordered_map/requirements/explicit_instantiation/3.cc:
2321         Likewise.
2322         * testsuite/23_containers/unordered_multimap/requirements/explicit_instantiation/3.cc:
2323         Likewise.
2324         * testsuite/23_containers/unordered_multiset/requirements/explicit_instantiation/3.cc:
2325         Likewise.
2326         * testsuite/23_containers/unordered_set/requirements/explicit_instantiation/3.cc:
2327         Likewise.
2328         * testsuite/23_containers/vector/ext_pointer/explicit_instantiation/3.cc:
2329         Likewise.
2330         * testsuite/23_containers/vector/requirements/explicit_instantiation/3.cc:
2331         Likewise.
2332
2333 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
2334
2335         * include/bits/boost_concept_check.h (_ForwardIteratorConcept)
2336         (_BidirectionalIteratorConcept, _RandomAccessIteratorConcept):
2337         Check result types of iterator operations.
2338         (_Mutable_ForwardIteratorConcept): Check that iterator's
2339         reference type is a reference to its value type.
2340         (_Mutable_BidirectionalIteratorConcept): Do not require the
2341         value type to be assignable.
2342         (_Mutable_RandomAccessIteratorConcept): Likewise.
2343         * testsuite/24_iterators/operations/prev_neg.cc: Adjust dg-error
2344         line number.
2345
2346 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
2347
2348         * testsuite/25_algorithms/copy/34595.cc: Add missing operation
2349         for type used as an iterator.
2350         * testsuite/25_algorithms/unique_copy/check_type.cc: Likewise.
2351
2352 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
2353
2354         * testsuite/20_util/is_nothrow_swappable/value.h: Use custom
2355         comparison function for priority_queue of type with no
2356         relational operators.
2357         * testsuite/20_util/is_swappable/value.h: Likewise.
2358         * testsuite/24_iterators/output/concept.cc: Add operator< to
2359         type used in set.
2360
2361 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
2362
2363         * include/bits/boost_concept_check.h (_OutputIteratorConcept):
2364         Use a function to preserve value category of the type.
2365         * include/bits/stl_algobase.h (copy, move, fill_n): Use a
2366         reference as the second argument for _OutputIteratorConcept.
2367         (copy_backward, move_backward): Use _OutputIteratorConcept
2368         instead of _ConvertibleConcept.
2369
2370 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
2371
2372         * include/bits/stl_iterator.h (pointer_traits): Define partial
2373         specialization for __normal_iterator.
2374         * testsuite/24_iterators/normal_iterator/to_address.cc: New test.
2375
2376 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
2377
2378         * include/bits/move.h (forward(remove_reference_t<T>&&)):
2379         Improve text of static_assert.
2380         * testsuite/20_util/forward/c_neg.cc: Adjust dg-error.
2381         * testsuite/20_util/forward/f_neg.cc: Likewise.
2382
2383 2021-09-28  Jonathan Wakely  <jwakely@redhat.com>
2384
2385         PR libstdc++/102499
2386         * include/bits/fs_path.h (path::begin, path::end): Add noexcept
2387         to declarations, to match definitions.
2388
2389 2021-09-24  Jonathan Wakely  <jwakely@redhat.com>
2390
2391         * include/bits/range_access.h (cbegin, cend): Remove redundant
2392         'inline' specifier.
2393
2394 2021-09-23  Jonathan Wakely  <jwakely@redhat.com>
2395
2396         * testsuite/20_util/specialized_algorithms/memory_management_tools/destroy_neg.cc:
2397         Remove dg-error lines for C++20-only errors.
2398
2399 2021-09-23  Jonathan Wakely  <jwakely@redhat.com>
2400
2401         * testsuite/19_diagnostics/headers/system_error/93151.cc:
2402         Disable PCH.
2403
2404 2021-09-23  Jonathan Wakely  <jwakely@redhat.com>
2405
2406         * src/c++11/system_error.cc (system_error_category) [_WIN32]:
2407         Map Windows error codes to generic POSIX error numbers. Use
2408         FormatMessage instead of strerror.
2409         * testsuite/19_diagnostics/error_category/system_category.cc:
2410         Adjust for new behaviour on Windows.
2411
2412 2021-09-23  Jonathan Wakely  <jwakely@redhat.com>
2413
2414         * src/c++11/system_error.cc (generic_error_category): Define
2415         class and virtual functions as 'final'.
2416         (generic_error_category::equivalent(int, const error_condition&)):
2417         Override.
2418         (system_error_category): Define class and virtual functions as
2419         'final'.
2420         (system_error_category::equivalent(int, const error_condition&)):
2421         Override.
2422         (generic_category_instance, system_category_instance): Use
2423         constinit union to make the objects immortal.
2424
2425 2021-09-23  Jonathan Wakely  <jwakely@redhat.com>
2426
2427         PR libstdc++/102425
2428         * src/c++11/system_error.cc
2429         (system_error_category::default_error_condition): Add 0 to
2430         switch.
2431         * testsuite/19_diagnostics/error_category/102425.cc: New test.
2432
2433 2021-09-17  Jonathan Wakely  <jwakely@redhat.com>
2434
2435         * include/bits/fs_path.h (path::iterator): Add noexcept to all
2436         member functions and friend functions.
2437         (distance): Add noexcept.
2438         (advance): Add noexcept and inline.
2439         * include/experimental/bits/fs_path.h (path::iterator):
2440         Add noexcept to all member functions.
2441
2442 2021-09-17  Jonathan Wakely  <jwakely@redhat.com>
2443
2444         PR libstdc++/102270
2445         * include/std/tuple (_Tuple_impl): Add constexpr to constructor
2446         missed in previous patch.
2447         * testsuite/20_util/tuple/cons/102270.C: Moved to...
2448         * testsuite/20_util/tuple/cons/102270.cc: ...here.
2449         * testsuite/util/testsuite_allocator.h (SimpleAllocator): Add
2450         constexpr to constructor so it can be used for C++20 tests.
2451
2452 2021-09-17  Jonathan Wakely  <jwakely@redhat.com>
2453
2454         * testsuite/26_numerics/valarray/dr630-3.C: Moved to...
2455         * testsuite/26_numerics/valarray/dr630-3.cc: ...here.
2456         * testsuite/27_io/basic_iostream/cons/16251.C: Moved to...
2457         * testsuite/27_io/basic_iostream/cons/16251.cc: ...here.
2458
2459 2021-09-16  Jonathan Wakely  <jwakely@redhat.com>
2460
2461         * src/Makefile.am (stamp-debug): Add all Makefiles as
2462         prerequisites.
2463         * src/Makefile.in: Regenerate.
2464
2465 2021-09-16  Jonathan Wakely  <jwakely@redhat.com>
2466
2467         * testsuite/ext/pb_ds/regression/tree_map_rand.cc: Increase
2468         timeout factor to 3.
2469         * testsuite/ext/pb_ds/regression/tree_set_rand.cc: Likewise.
2470
2471 2021-09-16  Jonathan Wakely  <jwakely@redhat.com>
2472
2473         * doc/xml/manual/using.xml: Generalize to apply to more than
2474         just -std=c++11.
2475         * doc/html/manual/using_macros.html: Regenerate.
2476
2477 2021-09-16  Jonathan Wakely  <jwakely@redhat.com>
2478
2479         * include/std/optional (nullptr_t): Make constructor noexcept.
2480
2481 2021-09-16  Jonathan Wakely  <jwakely@redhat.com>
2482
2483         * include/bits/fs_path.h (advance): Remove non-deducible
2484         template parameter.
2485
2486 2021-09-16  Jonathan Wakely  <jwakely@redhat.com>
2487
2488         PR libstdc++/102270
2489         * include/std/tuple (_Head_base, _Tuple_impl): Add
2490         _GLIBCXX20_CONSTEXPR to allocator-extended constructors.
2491         (tuple<>::swap(tuple&)): Add _GLIBCXX20_CONSTEXPR.
2492         * testsuite/20_util/tuple/cons/102270.C: New test.
2493
2494 2021-09-16  Jonathan Wakely  <jwakely@redhat.com>
2495
2496         PR libstdc++/102280
2497         * include/std/span (span(Range&&)): Add constraint to deduction
2498         guide.
2499
2500 2021-09-16  Jonathan Wakely  <jwakely@redhat.com>
2501
2502         * src/c++98/Makefile.am: Use CXXCOMPILE not LTCXXCOMPILE.
2503         * src/c++98/Makefile.in: Regenerate.
2504
2505 2021-09-16  Jonathan Wakely  <jwakely@redhat.com>
2506
2507         * include/bits/basic_string.h [_GLIBCXX_USE_CXX11_ABI]
2508         (to_string): Add noexcept if the type width is 32 bits or less.
2509
2510 2021-09-16  Jonathan Wakely  <jwakely@redhat.com>
2511
2512         * include/bits/unique_ptr.h (__uniq_ptr_impl::_M_ptr)
2513         (__uniq_ptr_impl::_M_deleter): Add noexcept.
2514
2515 2021-09-16  Thomas Rodgers  <rodgert@twrodgers.com>
2516
2517         PR libstdc++/101761
2518         * testsuite/29_atomics/atomic_ref/wait_notify.cc (test): Use
2519         va and vb as arguments to wait/notify, remove unused bb local.
2520
2521 2021-09-15  Hugo Beauzée-Luyssen  <hugo@beauzee.fr>
2522
2523         * crossconfig.m4: Check for TLS support on mingw.
2524         * configure: Regenerate.
2525
2526 2021-09-13  Jason Merrill  <jason@redhat.com>
2527
2528         * include/std/version: Define __cpp_lib_hardware_interference_size.
2529         * libsupc++/new: Define hardware interference size variables.
2530
2531 2021-09-10  Jonathan Wakely  <jwakely@redhat.com>
2532
2533         * testsuite/experimental/net/internet/resolver/ops/lookup.cc:
2534         Fix invalid hostname to only match the .invalid TLD.
2535
2536 2021-09-02  Jonathan Wakely  <jwakely@redhat.com>
2537
2538         * include/bits/atomic_base.h (__atomic_base<P*>::compare_exchange_weak):
2539         Add new functions.
2540         * include/std/atomic (atomic<T*>::compare_exchange_weak): Use
2541         it.
2542
2543 2021-09-02  Jonathan Wakely  <jwakely@redhat.com>
2544
2545         * include/std/atomic: Tweak whitespace.
2546
2547 2021-09-02  Jonathan Wakely  <jwakely@redhat.com>
2548
2549         PR c++/102177
2550         * include/bits/atomic_base.h (__is_valid_cmpexch_failure_order):
2551         New function to check if a memory order is valid for the failure
2552         case of compare exchange operations.
2553         (__atomic_base<I>::compare_exchange_weak): Simplify assertions
2554         by using __is_valid_cmpexch_failure_order.
2555         (__atomic_base<I>::compare_exchange_strong): Likewise.
2556         (__atomic_base<P*>::compare_exchange_weak): Likewise.
2557         (__atomic_base<P*>::compare_exchange_strong): Likewise.
2558         (__atomic_impl::compare_exchange_weak): Add assertion.
2559         (__atomic_impl::compare_exchange_strong): Likewise.
2560         * include/std/atomic (atomic::compare_exchange_weak): Likewise.
2561         (atomic::compare_exchange_strong): Likewise.
2562
2563 2021-09-02  Jonathan Wakely  <jwakely@redhat.com>
2564
2565         * include/std/functional (invoke_r): Define.
2566         * include/std/version (__cpp_lib_invoke_r): Define.
2567         * testsuite/20_util/function_objects/invoke/version.cc: Check
2568         for __cpp_lib_invoke_r as well as __cpp_lib_invoke.
2569         * testsuite/20_util/function_objects/invoke/4.cc: New test.
2570
2571 2021-08-31  Jonathan Wakely  <jwakely@redhat.com>
2572
2573         PR libstdc++/98421
2574         * include/std/span (span(Iter, size_type), span(Iter, Iter)):
2575         Add valid range checks.
2576         * testsuite/23_containers/span/cons_1_assert_neg.cc: New test.
2577         * testsuite/23_containers/span/cons_2_assert_neg.cc: New test.
2578
2579 2021-08-31  Jonathan Wakely  <jwakely@redhat.com>
2580
2581         * configure.ac: Fix checks for F_GETFL, F_SETFL and O_NONBLOCK.
2582         * configure: Regenerate.
2583
2584 2021-08-31  Jonathan Wakely  <jwakely@redhat.com>
2585
2586         * src/c++11/system_error.cc (error_category::~error_category()):
2587         Remove noexcept-specifier.
2588         (system_error::~system_error()): Likewise.
2589         * testsuite/19_diagnostics/error_category/noexcept.cc: New test.
2590         * testsuite/19_diagnostics/system_error/noexcept.cc: New test.
2591
2592 2021-08-31  Jonathan Wakely  <jwakely@redhat.com>
2593
2594         PR libstdc++/102074
2595         * include/bits/atomic_timed_wait.h (__timed_waiter_pool)
2596         [!_GLIBCXX_HAVE_PLATFORM_TIMED_WAIT]: Add missing return.
2597
2598 2021-08-31  Jonathan Wakely  <jwakely@redhat.com>
2599
2600         * include/experimental/internet (__make_resolver_error_code):
2601         Handle EAI_SYSTEM errors.
2602         (basic_resolver_results): Use __make_resolver_error_code. Use
2603         Glibc NI_MAXHOST and NI_MAXSERV values for buffer sizes.
2604
2605 2021-08-31  Jonathan Wakely  <jwakely@redhat.com>
2606
2607         * testsuite/experimental/net/internet/resolver/ops/lookup.cc:
2608         Try other service if "http" fails.
2609
2610 2021-08-31  Jonathan Wakely  <jwakely@redhat.com>
2611
2612         * testsuite/17_intro/names.cc: Undefine some more names used
2613         by Solaris system headers.
2614
2615 2021-08-30  Jason Merrill  <jason@redhat.com>
2616
2617         PR c++/96286
2618         * testsuite/30_threads/promise/requirements/lwg3466.cc:
2619         Remove dg-prune-outputs.
2620
2621 2021-08-28  Jonathan Wakely  <jwakely@redhat.com>
2622
2623         * include/bits/alloc_traits.h (allocator_traits): Add explicit
2624         specialization for allocator<void>. Improve doxygen comments.
2625         * include/bits/allocator.h (allocator<void>): Restore for the
2626         versioned namespace.
2627         (allocator<void>::construct, allocator<void>::destroy): Remove.
2628         * include/ext/extptr_allocator.h (_Extptr_allocator<void>):
2629         Add default constructor and converting constructor.
2630
2631 2021-08-28  Jonathan Wakely  <jwakely@redhat.com>
2632
2633         * include/bits/stl_uninitialized.h: Fix typo in comment.
2634
2635 2021-08-28  Jonathan Wakely  <jwakely@redhat.com>
2636
2637         PR libstdc++/99876
2638         * src/c++17/fs_ops.cc (fs::absolute): Call non-throwing form,
2639         to avoid unnecessary current_path() call.
2640
2641 2021-08-28  Jonathan Wakely  <jwakely@redhat.com>
2642
2643         * include/bits/std_function.h (function::function(F&&)): Give
2644         name to defaulted template parameter, to improve diagnostics.
2645         Use markdown for more doxygen comments.
2646
2647 2021-08-26  Jonathan Wakely  <jwakely@redhat.com>
2648
2649         * include/bits/std_function.h (function): Adjust doxygen
2650         comments.
2651         * include/bits/unique_ptr.h (make_unique_for_overwrite):
2652         Change parameter name to match doxygen comment.
2653
2654 2021-08-26  Jonathan Wakely  <jwakely@redhat.com>
2655
2656         * include/bits/std_function.h (_function_base::_Base_manager):
2657         Replace _M_init_functor with a function template using a
2658         forwarding reference, and a pair of _M_create function
2659         templates. Reuse _M_create for the clone operation.
2660         (function::_Decay_t): New alias template.
2661         (function::_Callable): Simplify by using _Decay.
2662         (function::function(F)): Change parameter to forwarding
2663         reference, as per LWG 2447. Add noexcept-specifier. Simplify
2664         constraints.
2665         (function::operator=(F&&)): Add noexcept-specifier.
2666         * testsuite/20_util/function/cons/lwg2774.cc: New test.
2667         * testsuite/20_util/function/cons/noexcept.cc: New test.
2668
2669 2021-08-26  Jonathan Wakely  <jwakely@redhat.com>
2670
2671         * include/bits/std_function.h (function::function(F)): Add
2672         static assertions to check constructibility requirements.
2673
2674 2021-08-26  Jonathan Wakely  <jwakely@redhat.com>
2675
2676         PR libstdc++/100285
2677         * configure.ac: Check for O_NONBLOCK.
2678         * configure: Regenerate.
2679         * include/experimental/internet: Include <ws2tcpip.h> for
2680         Windows.  Use preprocessor conditions around more constants.
2681         * include/experimental/socket: Use preprocessor conditions
2682         around more constants.
2683         * testsuite/experimental/net/internet/resolver/base.cc: Only use
2684         constants when the corresponding C macro is defined.
2685         * testsuite/experimental/net/socket/basic_socket.cc: Likewise.
2686         * testsuite/experimental/net/socket/socket_base.cc: Likewise.
2687         Make preprocessor checks more fine-grained.
2688
2689 2021-08-25  Jonathan Wakely  <jwakely@redhat.com>
2690
2691         * testsuite/17_intro/names.cc: Check 'sz'.
2692
2693 2021-08-25  Jonathan Wakely  <jwakely@redhat.com>
2694
2695         * testsuite/17_intro/names.cc: Adjust for Windows.
2696
2697 2021-08-25  Jonathan Wakely  <jwakely@redhat.com>
2698
2699         * include/std/valarray: Uglify 'func' parameters.
2700         * testsuite/17_intro/names.cc: Add 'func' to checks.
2701
2702 2021-08-25  Jonathan Wakely  <jwakely@redhat.com>
2703
2704         PR libstdc++/102064
2705         * include/bits/stl_uninitialized.h (_GLIBCXX_USE_ASSIGN_FOR_INIT):
2706         Define macro to check conditions for optimizing trivial cases.
2707         (__check_constructible): New function to do static assert.
2708         (uninitialized_copy, uninitialized_fill, uninitialized_fill_n):
2709         Use new macro.
2710         * testsuite/20_util/specialized_algorithms/uninitialized_copy/1.cc:
2711         Adjust dg-error pattern.
2712         * testsuite/23_containers/vector/cons/89164.cc: Likewise. Add
2713         C++17-specific checks from 89164_c++17.cc.
2714         * testsuite/23_containers/vector/cons/89164_c++17.cc: Removed.
2715         * testsuite/20_util/specialized_algorithms/uninitialized_copy/102064.cc:
2716         New test.
2717         * testsuite/20_util/specialized_algorithms/uninitialized_copy_n/102064.cc:
2718         New test.
2719         * testsuite/20_util/specialized_algorithms/uninitialized_fill/102064.cc:
2720         New test.
2721         * testsuite/20_util/specialized_algorithms/uninitialized_fill_n/102064.cc:
2722         New test.
2723
2724 2021-08-25  Jonathan Wakely  <jwakely@redhat.com>
2725
2726         PR libstdc++/102048
2727         * include/ext/rope (rope::erase(size_type)): Remove broken
2728         function.
2729
2730 2021-08-24  Jonathan Wakely  <jwakely@redhat.com>
2731
2732         * doc/xml/manual/status_cxx2020.xml: Update table.
2733         * doc/html/manual/status.html: Regenerate.
2734
2735 2021-08-24  Jonathan Wakely  <jwakely@redhat.com>
2736
2737         * include/std/type_traits (is_layout_compatible): Define.
2738         (is_corresponding_member): Define.
2739         * include/std/version (__cpp_lib_is_layout_compatible): Define.
2740         * testsuite/20_util/is_layout_compatible/is_corresponding_member.cc:
2741         New test.
2742         * testsuite/20_util/is_layout_compatible/value.cc: New test.
2743         * testsuite/20_util/is_layout_compatible/version.cc: New test.
2744         * testsuite/20_util/is_pointer_interconvertible/with_class.cc:
2745         New test.
2746         * testsuite/23_containers/span/layout_compat.cc: Do not use real
2747         std::is_layout_compatible trait if available.
2748
2749 2021-08-24  Jonathan Wakely  <jwakely@redhat.com>
2750
2751         * src/c++11/cxx11-shim_facets.cc: Fix mismatched class-key in
2752         explicit instantiation definitions.
2753
2754 2021-08-23  Jonathan Wakely  <jwakely@redhat.com>
2755
2756         * include/std/ranges (basic_istream_view): Add default template
2757         argument.
2758         * testsuite/std/ranges/istream_view.cc: Check it.
2759
2760 2021-08-23  Jonathan Wakely  <jwakely@redhat.com>
2761
2762         * libsupc++/dyncast.cc (__dynamic_cast): Add __builtin_expect to
2763         precondition check.
2764
2765 2021-08-23  Jonathan Wakely  <jwakely@redhat.com>
2766
2767         PR libstdc++/90787
2768         * testsuite/util/testsuite_fs.h (permissions_are_testable):
2769         Define as inline.
2770
2771 2021-08-20  Jonathan Wakely  <jwakely@redhat.com>
2772
2773         PR libstdc++/90787
2774         * testsuite/27_io/filesystem/iterators/directory_iterator.cc:
2775         Use new __gnu_test::permissions_are_testable() function.
2776         * testsuite/27_io/filesystem/iterators/recursive_directory_iterator.cc:
2777         Likewise.
2778         * testsuite/27_io/filesystem/operations/exists.cc: Likewise.
2779         * testsuite/27_io/filesystem/operations/is_empty.cc: Likewise.
2780         * testsuite/27_io/filesystem/operations/remove.cc: Likewise.
2781         * testsuite/27_io/filesystem/operations/remove_all.cc: Likewise.
2782         * testsuite/27_io/filesystem/operations/status.cc: Likewise.
2783         * testsuite/27_io/filesystem/operations/symlink_status.cc:
2784         Likewise.
2785         * testsuite/27_io/filesystem/operations/temp_directory_path.cc:
2786         Likewise.
2787         * testsuite/experimental/filesystem/iterators/directory_iterator.cc:
2788         Likewise.
2789         * testsuite/experimental/filesystem/iterators/recursive_directory_iterator.cc:
2790         Likewise.
2791         * testsuite/experimental/filesystem/operations/exists.cc:
2792         Likewise.
2793         * testsuite/experimental/filesystem/operations/is_empty.cc:
2794         Likewise.
2795         * testsuite/experimental/filesystem/operations/remove.cc:
2796         Likewise.
2797         * testsuite/experimental/filesystem/operations/remove_all.cc:
2798         Likewise.
2799         * testsuite/experimental/filesystem/operations/temp_directory_path.cc:
2800         Likewise.
2801         * testsuite/util/testsuite_fs.h (__gnu_test::permissions_are_testable):
2802         New function to guess whether testing permissions will work.
2803
2804 2021-08-19  Jonathan Wakely  <jwakely@redhat.com>
2805
2806         * doc/xml/manual/status_cxx2020.xml: Move row  earlier in table.
2807         * doc/html/manual/status.html: Regenerate.
2808
2809 2021-08-19  Jonathan Wakely  <jwakely@redhat.com>
2810
2811         * doc/doxygen/user.cfg.in: Update to Doxygen 1.9.2
2812
2813 2021-08-19  Jonathan Wakely  <jwakely@redhat.com>
2814
2815         PR libstdc++/101965
2816         * include/std/charconv (__to_chars_i): Remove redundant check.
2817
2818 2021-08-19  Jonathan Wakely  <jwakely@redhat.com>
2819
2820         PR libstdc++/101960
2821         * include/std/tuple (_Tuple_impl(_Tuple_impl&&)): Use base
2822         class' move constructor. Define as defaulted for versioned
2823         namespace.
2824         * testsuite/20_util/tuple/cons/101960.cc: New test.
2825
2826 2021-08-19  Jonathan Wakely  <jwakely@redhat.com>
2827
2828         PR libstdc++/100139
2829         * doc/xml/manual/status_cxx2020.xml: Add P1739R4 to status table.
2830         * doc/html/manual/status.html: Regenerate.
2831
2832 2021-08-19  Jonathan Wakely  <jwakely@redhat.com>
2833
2834         * include/bits/shared_ptr.h: Add @since and @headerfile tags.
2835         * include/bits/unique_ptr.h: Add @headerfile tags.
2836
2837 2021-08-19  Jonathan Wakely  <jwakely@redhat.com>
2838
2839         * src/filesystem/ops-common.h (filesystem::file_time): Improve
2840         overflow check by using system_clock::duration::max().
2841
2842 2021-08-19  Jonathan Wakely  <jwakely@redhat.com>
2843
2844         * include/bits/stl_tree.h: Tweak whitespace.
2845
2846 2021-08-18  Jonathan Wakely  <jwakely@redhat.com>
2847
2848         * include/bits/unique_ptr.h (default_delete): Add @since tag.
2849         (unique_ptr, unique_ptr<T[]>): Likewise. Improve @brief.
2850         (make_unique, make_unique_for_overwrite): Likewise. Add @tparam,
2851         @param, and @returns.
2852         (_MakeUniq): Move to __detail namespace. Add alias template
2853         helpers.
2854
2855 2021-08-18  Jonathan Wakely  <jwakely@redhat.com>
2856
2857         * include/bits/stl_function.h: Improve doxygen comments.
2858
2859 2021-08-18  Jonathan Wakely  <jwakely@redhat.com>
2860
2861         * doc/doxygen/user.cfg.in (PREDEFINED): Enable doxygen
2862         processing for C++20 components and components that depend on
2863         compiler features.
2864         * include/bits/stl_algo.h (random_shuffle): Use @deprecated.
2865         * include/std/type_traits: Improve doxygen comments for C++20
2866         traits.
2867
2868 2021-08-18  Jonathan Wakely  <jwakely@redhat.com>
2869
2870         * include/ext/type_traits.h (__promote_2, __promote_3)
2871         (__promote_4): Redfine as alias templates using __promoted_t.
2872         * include/std/complex (__promote_2): Remove partial
2873         specializations for std::complex.
2874
2875 2021-08-18  Jonathan Wakely  <jwakely@redhat.com>
2876
2877         * include/bits/stl_algo.h (min(initializer_list<T>))
2878         (min(initializer_list<T>, Compare)): Call __min_element directly to
2879         avoid redundant debug checks for valid ranges.
2880         (max(initializer_list<T>), max(initializer_list<T>, Compare)):
2881         Likewise, for __max_element.
2882         (minmax(initializer_list<T>), minmax(initializer_list<T>, Compare)):
2883         Likewise, for __minmax_element.
2884
2885 2021-08-18  Jonathan Wakely  <jwakely@redhat.com>
2886
2887         * include/debug/deque (deque(size_type, const T&, const A&)):
2888         Prevent class template argument deduction and replace with a
2889         deduction guide.
2890         * include/debug/forward_list (forward_list(size_type, const T&, const A&)):
2891         Likewise.
2892         * include/debug/list (list(size_type, const T&, const A&)):
2893         Likewise.
2894         * include/debug/vector (vector(size_type, const T&, const A&)):
2895         Likewise.
2896
2897 2021-08-18  Jonathan Wakely  <jwakely@redhat.com>
2898
2899         * python/libstdcxx/v6/printers.py (StdBitReferencePrinter): Use
2900         'std::vector<bool>::reference' as type name, not _Bit_reference.
2901         (build_libstdcxx_dictionary): Register printers for vector<bool>
2902         types in debug mode too.
2903         * testsuite/libstdc++-prettyprinters/simple.cc: Adjust expected
2904         output for invalid _Bit_reference. Use vector<bool>::reference
2905         instead of _Bit_reference.
2906         * testsuite/libstdc++-prettyprinters/simple11.cc: Likewise.
2907
2908 2021-08-17  Thomas Schwinge  <thomas@codesourcery.com>
2909
2910         * testsuite/lib/libstdc++.exp: Avoid illegal argument to verbose,
2911         continued.
2912
2913 2021-08-17  Luc Michel  <lmichel@kalray.eu>
2914             Marc Poulhies  <mpoulhies@kalrayinc.com>
2915
2916         * testsuite/lib/gdb-test.exp (gdb_version_check)
2917         (gdb_version_check_xmethods): Only check the GDB version for
2918         local native targets.
2919
2920 2021-08-17  Antony Polukhin  <antoshkka@gmail.com>
2921             Jonathan Wakely  <jwakely@redhat.com>
2922
2923         * include/bits/random.tcc (seed_seq::seed_seq): Reserve capacity
2924         if distance is O(1).
2925         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error
2926         line number.
2927
2928 2021-08-17  Jonathan Wakely  <jwakely@redhat.com>
2929
2930         * testsuite/26_numerics/random/seed_seq/cons/range.cc: Check
2931         construction from input iterators.
2932
2933 2021-08-17  Jonathan Wakely  <jwakely@redhat.com>
2934
2935         * python/libstdcxx/v6/printers.py (StdErrorCatPrinter): Remove.
2936
2937 2021-08-17  Jonathan Wakely  <jwakely@redhat.com>
2938
2939         PR libstdc++/101923
2940         * include/bits/std_function.h (function(function&&)): Check for
2941         non-empty parameter before doing any work.
2942
2943 2021-08-17  Jonathan Wakely  <jwakely@redhat.com>
2944
2945         * include/bits/cow_string.h (basic_string::contains): Do not
2946         define for -std=gnu++20.
2947
2948 2021-08-17  Jonathan Wakely  <jwakely@redhat.com>
2949
2950         * include/bits/ranges_util.h (__not_same_as): Rename to
2951         __different_from.
2952         * include/std/ranges (__not_same_as): Likewise.
2953
2954 2021-08-17  Jonathan Wakely  <jwakely@redhat.com>
2955
2956         * include/std/utility (exchange): Add noexcept-specifier.
2957         * testsuite/20_util/exchange/noexcept.cc: New test.
2958
2959 2021-08-17  Jonathan Wakely  <jwakely@redhat.com>
2960
2961         * python/libstdcxx/v6/printers.py (StdErrorCodePrinter): Define.
2962         (build_libstdcxx_dictionary): Register printer for
2963         std::error_code and std::error_condition.
2964         * testsuite/libstdc++-prettyprinters/cxx11.cc: Test it.
2965
2966 2021-08-16  Jonathan Wakely  <jwakely@redhat.com>
2967
2968         PR libstdc++/101937
2969         * src/c++11/debug.cc (PrintContext::_M_indent): Replace with a
2970         static data member.
2971         (print_word): Use qualified-id to access it.
2972
2973 2021-08-16  Jonathan Wakely  <jwakely@redhat.com>
2974
2975         * python/Makefile.am [GLIBCXX_BUILD_DEBUG] (install-data-local):
2976         Install another copy of the GDB hook.
2977         * python/Makefile.in: Regenerate.
2978
2979 2021-08-12  Jonathan Wakely  <jwakely@redhat.com>
2980
2981         PR libstdc++/101870
2982         * include/c_global/cmath (hypot): Use __promoted_t.
2983         (lerp): Add new overload accepting any arithmetic types.
2984         * include/ext/type_traits.h (__promoted_t): New alias template.
2985         * testsuite/26_numerics/lerp.cc: Moved to...
2986         * testsuite/26_numerics/lerp/1.cc: ...here.
2987         * testsuite/26_numerics/lerp/constexpr.cc: New test.
2988         * testsuite/26_numerics/lerp/version.cc: New test.
2989
2990 2021-08-12  Jonathan Wakely  <jwakely@redhat.com>
2991
2992         * testsuite/26_numerics/lerp.cc: Add header name to #error.
2993         * testsuite/26_numerics/midpoint/integral.cc: Likewise.
2994         * testsuite/26_numerics/midpoint/version.cc: New test.
2995
2996 2021-08-12  Jonathan Wakely  <jwakely@redhat.com>
2997
2998         * include/experimental/random (experimental::randint): Add
2999         nodiscard attribute.
3000
3001 2021-08-12  Jonathan Wakely  <jwakely@redhat.com>
3002
3003         * src/c++98/locale_init.cc: Require C++11.
3004         * src/c++98/localename.cc: Likewise.
3005         * src/c++98/misc-inst.cc: Require C++98.
3006
3007 2021-08-11  Jonathan Wakely  <jwakely@redhat.com>
3008
3009         PR libstdc++/101866
3010         * testsuite/experimental/random/randint.cc: Loop and retry if
3011         reseed() produces the same sequence.
3012
3013 2021-08-11  Jonathan Wakely  <jwakely@redhat.com>
3014
3015         * include/std/type_traits (__cpp_lib_is_pointer_interconvertible)
3016         (is_pointer_interconvertible_base_of_v)
3017         (is_pointer_interconvertible_base_of): Define for C++20.
3018         * include/std/version (__cpp_lib_is_pointer_interconvertible):
3019         Define.
3020         * testsuite/23_containers/span/layout_compat.cc: Use correct
3021         feature test macro for std::is_layout_compatible_v.
3022         * testsuite/20_util/is_pointer_interconvertible/value.cc: New test.
3023         * testsuite/20_util/is_pointer_interconvertible/version.cc: New test.
3024
3025 2021-08-09  Jonathan Wakely  <jwakely@redhat.com>
3026
3027         * include/bits/regex.h (basic_regex::transform_primary): Use
3028         _GLIBCXX_STD_C::vector for local variable.
3029         * include/bits/regex.tcc (__regex_algo_impl): Use reference to
3030         _GLIBCXX_STD_C::vector base class of match_results.
3031         * include/bits/regex_automaton.tcc (_StateSeq:_M_clone): Use
3032         _GLIBCXX_STD_C::map and _GLIBCXX_STD_C::deque for local
3033         variables.
3034         * include/bits/regex_compiler.h (_BracketMatcher): Use
3035         _GLIBCXX_STD_C::vector for data members.
3036         * include/bits/regex_executor.h (_Executor): Likewise.
3037         * include/std/regex [_GLIBCXX_DEBUG]: Include <debug/vector>.
3038
3039 2021-08-09  François Dumont  <fdumont@gcc.gnu.org>
3040
3041         * include/debug/safe_container.h
3042         (_Safe_container(_Safe_container&&, const _Alloc&, std::true_type)): New.
3043         (_Safe_container(_Safe_container&&, const _Alloc&, std::false_type)): New.
3044         (_Safe_container(_Safe_container&&, const _Alloc&)): Use latters.
3045
3046 2021-08-09  Jonathan Wakely  <jwakely@redhat.com>
3047
3048         * testsuite/23_containers/unordered_map/cons/default.cc: Add
3049         equality comparison operators to allocator.
3050         * testsuite/23_containers/unordered_set/cons/default.cc:
3051         Likewise.
3052
3053 2021-08-08  François Dumont  <fdumont@gcc.gnu.org>
3054
3055         * testsuite/25_algorithms/copy/debug/constexpr_neg.cc: Replace 'failed_assertion'
3056         dg-prune-output reason with 'builtin_unreachable'.
3057         * testsuite/25_algorithms/copy_backward/debug/constexpr_neg.cc: Likewise.
3058         * testsuite/25_algorithms/equal/debug/constexpr_neg.cc: Likewise.
3059         * testsuite/25_algorithms/lower_bound/debug/constexpr_partitioned_neg.cc: Likewise.
3060         * testsuite/25_algorithms/lower_bound/debug/constexpr_partitioned_pred_neg.cc: Likewise.
3061         * testsuite/25_algorithms/lower_bound/debug/constexpr_valid_range_neg.cc: Likewise.
3062         * testsuite/25_algorithms/upper_bound/debug/constexpr_partitioned_neg.cc: Likewise.
3063         * testsuite/25_algorithms/upper_bound/debug/constexpr_partitioned_pred_neg.cc: Likewise.
3064         * testsuite/25_algorithms/upper_bound/debug/constexpr_valid_range_neg.cc: Likewise.
3065
3066 2021-08-08  Hans-Peter Nilsson  <hp@bitrange.com>
3067
3068         * testsuite/std/ranges/iota/max_size_type.cc: Set
3069         dg-timeout-factor to 4.
3070
3071 2021-08-06  Jonathan Wakely  <jwakely@redhat.com>
3072
3073         * libsupc++/compare (compare_three_way, strong_order)
3074         (weak_order, partial_order, compare_strong_order_fallback)
3075         (compare_weak_order_fallback, compare_partial_order_fallback):
3076         Move nodiscard attributes to correct location.
3077
3078 2021-08-05  Jonathan Wakely  <jwakely@redhat.com>
3079
3080         PR libstdc++/101782
3081         * include/bits/ranges_base.h (ranges::begin, ranges::end)
3082         (ranges::rbegin, ranges::rend, ranges::size, ranges::ssize)
3083         (ranges::empty, ranges::data): Move attribute after the
3084         declarator-id instead of at the end of the declarator.
3085         * include/bits/stl_iterator.h (__gnu_cxx::__normal_iterator):
3086         Move attributes back to the start of the function declarator,
3087         but move the requires-clause to the end.
3088         (common_iterator): Move attribute after the declarator-id.
3089         * include/bits/stl_queue.h (queue): Remove ill-formed attributes
3090         from friend declaration that are not definitions.
3091         * include/std/ranges (views::all, views::filter)
3092         (views::transform, views::take, views::take_while,
3093         views::drop) (views::drop_while, views::join,
3094         views::lazy_split) (views::split, views::counted,
3095         views::common, views::reverse) (views::elements): Move
3096         attributes after the declarator-id.
3097
3098 2021-08-05  Jonathan Wakely  <jwakely@redhat.com>
3099
3100         * libsupc++/compare (partial_ordering, weak_ordering)
3101         (strong_ordering, is_eq, is_neq, is_lt, is_lteq, is_gt, is_gteq)
3102         (compare_three_way, strong_order, weak_order, partial_order)
3103         (compare_strong_order_fallback, compare_weak_order_fallback)
3104         (compare_partial_order_fallback, __detail::__synth3way): Add
3105         nodiscard attribute.
3106         * testsuite/18_support/comparisons/categories/zero_neg.cc: Add
3107         -Wno-unused-result to options.
3108
3109 2021-08-05  Jonathan Wakely  <jwakely@redhat.com>
3110
3111         PR libstdc++/101782
3112         * include/bits/ranges_base.h (ranges::begin, ranges::end)
3113         (ranges::rbegin, ranges::rend, ranges::size, ranges::ssize)
3114         (ranges::empty, ranges::data): Move attribute to the end of
3115         the declarator.
3116         * include/bits/stl_iterator.h (__gnu_cxx::__normal_iterator)
3117         (common_iterator): Likewise for non-member operator functions.
3118         * include/std/ranges (views::all, views::filter)
3119         (views::transform, views::take, views::take_while, views::drop)
3120         (views::drop_while, views::join, views::lazy_split)
3121         (views::split, views::counted, views::common, views::reverse)
3122         (views::elements): Likewise.
3123         * testsuite/std/ranges/access/101782.cc: New test.
3124
3125 2021-08-04  Jonathan Wakely  <jwakely@redhat.com>
3126
3127         * include/bits/forward_list.h: Add [[nodiscard]] to functions
3128         with no side-effects.
3129         * include/bits/stl_bvector.h: Likewise.
3130         * include/bits/stl_deque.h: Likewise.
3131         * include/bits/stl_list.h: Likewise.
3132         * include/bits/stl_queue.h: Likewise.
3133         * include/bits/stl_stack.h: Likewise.
3134         * include/bits/stl_vector.h: Likewise.
3135         * include/debug/deque: Likewise.
3136         * include/debug/forward_list: Likewise.
3137         * include/debug/list: Likewise.
3138         * include/debug/safe_iterator.h: Likewise.
3139         * include/debug/vector: Likewise.
3140         * include/std/array: Likewise.
3141         * testsuite/23_containers/array/creation/3_neg.cc: Use
3142         -Wno-unused-result.
3143         * testsuite/23_containers/array/debug/back1_neg.cc: Cast result
3144         to void.
3145         * testsuite/23_containers/array/debug/back2_neg.cc: Likewise.
3146         * testsuite/23_containers/array/debug/front1_neg.cc: Likewise.
3147         * testsuite/23_containers/array/debug/front2_neg.cc: Likewise.
3148         * testsuite/23_containers/array/debug/square_brackets_operator1_neg.cc:
3149         Likewise.
3150         * testsuite/23_containers/array/debug/square_brackets_operator2_neg.cc:
3151         Likewise.
3152         * testsuite/23_containers/array/tuple_interface/get_neg.cc:
3153         Adjust dg-error line numbers.
3154         * testsuite/23_containers/deque/cons/clear_allocator.cc: Cast
3155         result to void.
3156         * testsuite/23_containers/deque/debug/invalidation/4.cc:
3157         Likewise.
3158         * testsuite/23_containers/deque/types/1.cc: Use
3159         -Wno-unused-result.
3160         * testsuite/23_containers/list/types/1.cc: Cast result to void.
3161         * testsuite/23_containers/priority_queue/members/7161.cc:
3162         Likewise.
3163         * testsuite/23_containers/queue/members/7157.cc: Likewise.
3164         * testsuite/23_containers/vector/59829.cc: Likewise.
3165         * testsuite/23_containers/vector/ext_pointer/types/1.cc:
3166         Likewise.
3167         * testsuite/23_containers/vector/ext_pointer/types/2.cc:
3168         Likewise.
3169         * testsuite/23_containers/vector/types/1.cc: Use
3170         -Wno-unused-result.
3171
3172 2021-08-04  Jonathan Wakely  <jwakely@redhat.com>
3173
3174         * include/bits/iterator_concepts.h (iter_move): Add
3175         [[nodiscard]].
3176         * include/bits/range_access.h (begin, end, cbegin, cend)
3177         (rbegin, rend, crbegin, crend, size, data, ssize): Likewise.
3178         * include/bits/ranges_base.h (ranges::begin, ranges::end)
3179         (ranges::cbegin, ranges::cend, ranges::rbegin, ranges::rend)
3180         (ranges::crbegin, ranges::crend, ranges::size, ranges::ssize)
3181         (ranges::empty, ranges::data, ranges::cdata): Likewise.
3182         * include/bits/stl_iterator.h (reverse_iterator, __normal_iterator)
3183         (back_insert_iterator, front_insert_iterator, insert_iterator)
3184         (move_iterator, move_sentinel, common_iterator)
3185         (counted_iterator): Likewise.
3186         * include/bits/stl_iterator_base_funcs.h (distance, next, prev):
3187         Likewise.
3188         * include/bits/stream_iterator.h (istream_iterator)
3189         (ostream_iterartor): Likewise.
3190         * include/bits/streambuf_iterator.h (istreambuf_iterator)
3191         (ostreambuf_iterator): Likewise.
3192         * include/std/ranges (views::single, views::iota, views::all)
3193         (views::filter, views::transform, views::take, views::take_while)
3194         (views::drop, views::drop_while, views::join, views::lazy_split)
3195         (views::split, views::counted, views::common, views::reverse)
3196         (views::elements): Likewise.
3197         * testsuite/20_util/rel_ops.cc: Use -Wno-unused-result.
3198         * testsuite/24_iterators/move_iterator/greedy_ops.cc: Likewise.
3199         * testsuite/24_iterators/normal_iterator/greedy_ops.cc:
3200         Likewise.
3201         * testsuite/24_iterators/reverse_iterator/2.cc: Likewise.
3202         * testsuite/24_iterators/reverse_iterator/greedy_ops.cc:
3203         Likewise.
3204         * testsuite/21_strings/basic_string/range_access/char/1.cc:
3205         Cast result to void.
3206         * testsuite/21_strings/basic_string/range_access/wchar_t/1.cc:
3207         Likewise.
3208         * testsuite/21_strings/basic_string_view/range_access/char/1.cc:
3209         Likewise.
3210         * testsuite/21_strings/basic_string_view/range_access/wchar_t/1.cc:
3211         Likewise.
3212         * testsuite/23_containers/array/range_access.cc: Likewise.
3213         * testsuite/23_containers/deque/range_access.cc: Likewise.
3214         * testsuite/23_containers/forward_list/range_access.cc:
3215         Likewise.
3216         * testsuite/23_containers/list/range_access.cc: Likewise.
3217         * testsuite/23_containers/map/range_access.cc: Likewise.
3218         * testsuite/23_containers/multimap/range_access.cc: Likewise.
3219         * testsuite/23_containers/multiset/range_access.cc: Likewise.
3220         * testsuite/23_containers/set/range_access.cc: Likewise.
3221         * testsuite/23_containers/unordered_map/range_access.cc:
3222         Likewise.
3223         * testsuite/23_containers/unordered_multimap/range_access.cc:
3224         Likewise.
3225         * testsuite/23_containers/unordered_multiset/range_access.cc:
3226         Likewise.
3227         * testsuite/23_containers/unordered_set/range_access.cc:
3228         Likewise.
3229         * testsuite/23_containers/vector/range_access.cc: Likewise.
3230         * testsuite/24_iterators/customization_points/iter_move.cc:
3231         Likewise.
3232         * testsuite/24_iterators/istream_iterator/sentinel.cc:
3233         Likewise.
3234         * testsuite/24_iterators/istreambuf_iterator/sentinel.cc:
3235         Likewise.
3236         * testsuite/24_iterators/move_iterator/dr2061.cc: Likewise.
3237         * testsuite/24_iterators/operations/prev_neg.cc: Likewise.
3238         * testsuite/24_iterators/ostreambuf_iterator/2.cc: Likewise.
3239         * testsuite/24_iterators/range_access/range_access.cc:
3240         Likewise.
3241         * testsuite/24_iterators/range_operations/100768.cc: Likewise.
3242         * testsuite/26_numerics/valarray/range_access2.cc: Likewise.
3243         * testsuite/28_regex/range_access.cc: Likewise.
3244         * testsuite/experimental/string_view/range_access/char/1.cc:
3245         Likewise.
3246         * testsuite/experimental/string_view/range_access/wchar_t/1.cc:
3247         Likewise.
3248         * testsuite/ext/vstring/range_access.cc: Likewise.
3249         * testsuite/std/ranges/adaptors/take.cc: Likewise.
3250         * testsuite/std/ranges/p2259.cc: Likewise.
3251
3252 2021-08-03  Jonathan Wakely  <jwakely@redhat.com>
3253
3254         * include/bits/random.tcc (linear_congruential_engine): Do not
3255         define static constexpr members when they are implicitly inline.
3256         * include/std/ratio (ratio, __ratio_multiply, __ratio_divide)
3257         (__ratio_add, __ratio_subtract): Likewise.
3258         * include/std/type_traits (integral_constant): Likewise.
3259         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error
3260         line number.
3261
3262 2021-08-03  Jonathan Wakely  <jwakely@redhat.com>
3263
3264         * testsuite/util/testsuite_common_types.h: Replace uses of
3265         tr1::unordered_map and tr1::unordered_set with their C++11
3266         equivalents.
3267         * testsuite/29_atomics/atomic/cons/assign_neg.cc: Adjust
3268         dg-error line number.
3269         * testsuite/29_atomics/atomic/cons/copy_neg.cc: Likewise.
3270         * testsuite/29_atomics/atomic_integral/cons/assign_neg.cc:
3271         Likewise.
3272         * testsuite/29_atomics/atomic_integral/cons/copy_neg.cc:
3273         Likewise.
3274         * testsuite/29_atomics/atomic_integral/operators/bitwise_neg.cc:
3275         Likewise.
3276         * testsuite/29_atomics/atomic_integral/operators/decrement_neg.cc:
3277         Likewise.
3278         * testsuite/29_atomics/atomic_integral/operators/increment_neg.cc:
3279         Likewise.
3280
3281 2021-08-03  Jonathan Wakely  <jwakely@redhat.com>
3282
3283         * include/std/memory_resource (polymorphic_allocator::delete_object):
3284         Call destructor directly instead of using destroy.
3285         (allocator_traits<polymorphic_allocator<T>>): Define partial
3286         specialization.
3287
3288 2021-08-03  Jonathan Wakely  <jwakely@redhat.com>
3289
3290         * testsuite/20_util/function_objects/binders/3113.cc: Remove
3291         trailing whitespace.
3292         * testsuite/20_util/shared_ptr/assign/auto_ptr.cc: Likewise.
3293         * testsuite/20_util/shared_ptr/assign/auto_ptr_neg.cc: Likewise.
3294         * testsuite/20_util/shared_ptr/assign/auto_ptr_rvalue.cc:
3295         Likewise.
3296         * testsuite/20_util/shared_ptr/creation/dr925.cc: Likewise.
3297         * testsuite/25_algorithms/headers/algorithm/synopsis.cc:
3298         Likewise.
3299         * testsuite/25_algorithms/random_shuffle/requirements/explicit_instantiation/2.cc:
3300         Likewise.
3301         * testsuite/25_algorithms/random_shuffle/requirements/explicit_instantiation/pod.cc:
3302         Likewise.
3303
3304 2021-08-03  Jonathan Wakely  <jwakely@redhat.com>
3305
3306         * doc/xml/manual/evolution.xml: Document deprecation.
3307         * doc/html/*: Regenerate.
3308         * include/bits/c++config (_GLIBCXX14_DEPRECATED): Define.
3309         (_GLIBCXX14_DEPRECATED_SUGGEST): Define.
3310         * include/bits/stl_algo.h (random_shuffle): Deprecate for C++14
3311         and later.
3312         * testsuite/25_algorithms/headers/algorithm/synopsis.cc: Adjust
3313         for C++11 and C++14 changes to std::random_shuffle and
3314         std::shuffle.
3315         * testsuite/25_algorithms/random_shuffle/1.cc: Add options to
3316         use deprecated algorithms.
3317         * testsuite/25_algorithms/random_shuffle/59603.cc: Likewise.
3318         * testsuite/25_algorithms/random_shuffle/moveable.cc: Likewise.
3319         * testsuite/25_algorithms/random_shuffle/requirements/explicit_instantiation/2.cc:
3320         Likewise.
3321         * testsuite/25_algorithms/random_shuffle/requirements/explicit_instantiation/pod.cc:
3322         Likewise.
3323
3324 2021-08-03  Jonathan Wakely  <jwakely@redhat.com>
3325
3326         * testsuite/23_containers/forward_list/operations/3.cc:
3327         Use lambda instead of std::bind2nd.
3328         * testsuite/20_util/function_objects/binders/3113.cc: Add
3329         options for testing deprecated features.
3330         * testsuite/20_util/pair/cons/99957.cc: Likewise.
3331         * testsuite/20_util/shared_ptr/assign/auto_ptr.cc: Likewise.
3332         * testsuite/20_util/shared_ptr/assign/auto_ptr_neg.cc: Likewise.
3333         * testsuite/20_util/shared_ptr/assign/auto_ptr_rvalue.cc:
3334         Likewise.
3335         * testsuite/20_util/shared_ptr/cons/43820_neg.cc: Likewise.
3336         * testsuite/20_util/shared_ptr/cons/auto_ptr.cc: Likewise.
3337         * testsuite/20_util/shared_ptr/cons/auto_ptr_neg.cc: Likewise.
3338         * testsuite/20_util/shared_ptr/creation/dr925.cc: Likewise.
3339         * testsuite/20_util/unique_ptr/cons/auto_ptr.cc: Likewise.
3340         * testsuite/20_util/unique_ptr/cons/auto_ptr_neg.cc: Likewise.
3341         * testsuite/ext/pb_ds/example/priority_queue_erase_if.cc:
3342         Likewise.
3343         * testsuite/ext/pb_ds/example/priority_queue_split_join.cc:
3344         Likewise.
3345         * testsuite/lib/dg-options.exp (dg_add_options_using-deprecated):
3346         New proc.
3347
3348 2021-08-03  Jonathan Wakely  <jwakely@redhat.com>
3349
3350         * include/bits/regex_executor.h (_State_info): Replace
3351         unique_ptr<bool[]> with array of bool.
3352         * include/bits/regex_executor.tcc: Likewise.
3353         * include/bits/regex_scanner.tcc: Replace std::strchr with
3354         __builtin_strchr.
3355         * include/std/regex: Replace standard headers with smaller
3356         internal ones.
3357         * testsuite/28_regex/traits/char/lookup_classname.cc: Include
3358         <string.h> for strlen.
3359         * testsuite/28_regex/traits/char/lookup_collatename.cc:
3360         Likewise.
3361
3362 2021-08-03  Jonathan Wakely  <jwakely@redhat.com>
3363
3364         * include/bits/locale_conv.h (__detail::_Scoped_ptr): Define new
3365         RAII class template.
3366         (wstring_convert, wbuffer_convert): Use __detail::_Scoped_ptr
3367         instead of unique_ptr.
3368
3369 2021-08-02  Patrick Palka  <ppalka@redhat.com>
3370
3371         PR libstdc++/101599
3372         * include/bits/ranges_algo.h (__reverse_copy_fn::operator()):
3373         Add missing std::move in return statement.
3374         (__partition_copy_fn::operator()): Rename templtae parameter
3375         _O2 to _Out2.  Uglify function parameters out_true and out_false.
3376         * include/bits/ranges_algobase.h (__copy_or_move): Add missing
3377         std::move to recursive call that unwraps a __normal_iterator
3378         output iterator.
3379         * testsuite/25_algorithms/copy/constrained.cc (test06): New test.
3380         * testsuite/25_algorithms/move/constrained.cc (test05): New test.
3381
3382 2021-08-02  Patrick Palka  <ppalka@redhat.com>
3383
3384         PR libstdc++/101589
3385         * include/std/ranges (lazy_split_view::_InnerIter::base): Make
3386         the const& overload unconstrained and return a const reference
3387         as per LWG 3533.  Make unconditionally noexcept.
3388         (elements_view::base): Revert accidental r12-569 change.
3389         (elements_view::_Iterator::base): Make the const& overload
3390         unconstrained and return a const reference as per LWG 3533.
3391         Make unconditionally noexcept.
3392
3393 2021-08-02  Patrick Palka  <ppalka@redhat.com>
3394
3395         PR libstdc++/101483
3396         * include/std/ranges (join_view::_Iterator::_Iterator): Add
3397         missing std::move.
3398
3399 2021-08-02  Jonathan Wakely  <jwakely@redhat.com>
3400
3401         PR libstdc++/101709
3402         * src/filesystem/ops-common.h (get_temp_directory_from_env):
3403         Add error_code parameter.
3404         * src/c++17/fs_ops.cc (fs::temp_directory_path): Pass error_code
3405         argument to get_temp_directory_from_env and check it.
3406         * src/filesystem/ops.cc (fs::temp_directory_path): Likewise.
3407
3408 2021-08-02  Jonathan Wakely  <jwakely@redhat.com>
3409
3410         * testsuite/20_util/tuple/comparison_operators/overloaded2.cc:
3411         Add dg-error for c++11_only target.
3412
3413 2021-07-30  Jonathan Wakely  <jwakely@redhat.com>
3414
3415         PR libstdc++/65018
3416         * configure.ac: Check for secure_getenv.
3417         * config.h.in: Regenerate.
3418         * configure: Regenerate.
3419         * src/filesystem/ops-common.h (get_temp_directory_from_env): New
3420         helper function to obtain path from the environment.
3421         * src/c++17/fs_ops.cc (fs::temp_directory_path): Use new helper.
3422         * src/filesystem/ops.cc (fs::temp_directory_path): Likewise.
3423         * testsuite/27_io/filesystem/operations/temp_directory_path.cc:
3424         Print messages if test cannot be run.
3425         * testsuite/experimental/filesystem/operations/temp_directory_path.cc:
3426         Likewise. Fix incorrect condition. Use "TMP" to work with
3427         Windows as well as POSIX.
3428
3429 2021-07-29  Hans-Peter Nilsson  <hp@bitrange.com>
3430
3431         * src/c++17/memory_resource.cc: Use __exchange instead
3432         of std::exchange.
3433
3434 2021-07-27  Jonathan Wakely  <jwakely@redhat.com>
3435
3436         * include/experimental/optional (__throw_bad_optional_access):
3437         Replace GNU attribute with C++11 attribute.
3438         (optional::value, optional::value_or): Use if statements
3439         instead of conditional expressions.
3440         * include/std/optional (__throw_bad_optional_access)
3441         (optional::value, optional::value_or): Likewise.
3442
3443 2021-07-27  Marek Polacek  <polacek@redhat.com>
3444
3445         DR 1512
3446         PR c++/99701
3447         * testsuite/20_util/tuple/comparison_operators/overloaded.cc:
3448         Move a line...
3449         * testsuite/20_util/tuple/comparison_operators/overloaded2.cc:
3450         ...here.  New test.
3451
3452 2021-07-27  Jonathan Wakely  <jwakely@redhat.com>
3453
3454         * include/bits/cow_string.h: Consistently use tab for
3455         indentation.
3456
3457 2021-07-27  Jonathan Wakely  <jwakely@redhat.com>
3458
3459         * include/Makefile.am: Add new header.
3460         * include/Makefile.in: Regenerate.
3461         * include/bits/basic_string.h [!_GLIBCXX_USE_CXX11_ABI]
3462         (basic_string): Move definition of Copy-on-Write string to
3463         new file.
3464         * include/bits/basic_string.tcc: Likewise.
3465         * include/bits/cow_string.h: New file.
3466
3467 2021-07-27  Jonathan Wakely  <jwakely@redhat.com>
3468
3469         * include/std/algorithm: Do not include <utility>.
3470         * include/std/functional: Likewise.
3471         * include/std/regex: Include <bits/stl_pair.h> instead of
3472         <utility>.
3473         * include/debug/map.h: Likewise.
3474         * include/debug/multimap.h: Likewise.
3475         * include/debug/multiset.h: Likewise.
3476         * include/debug/set.h: Likewise.
3477         * include/debug/vector: Likewise.
3478         * include/bits/fs_path.h: Likewise.
3479         * include/bits/unique_ptr.h: Do not include <utility>.
3480         * include/experimental/any: Likewise.
3481         * include/experimental/executor: Likewise.
3482         * include/experimental/memory: Likewise.
3483         * include/experimental/optional: Likewise.
3484         * include/experimental/socket: Use __exchange instead
3485         of std::exchange.
3486         * src/filesystem/ops-common.h: Likewise.
3487         * testsuite/20_util/default_delete/48631_neg.cc: Adjust expected
3488         errors to not use a hardcoded line number.
3489         * testsuite/20_util/default_delete/void_neg.cc: Likewise.
3490         * testsuite/20_util/specialized_algorithms/uninitialized_copy/constrained.cc:
3491         Include <utility> for std::as_const.
3492         * testsuite/20_util/specialized_algorithms/uninitialized_default_construct/constrained.cc:
3493         Likewise.
3494         * testsuite/20_util/specialized_algorithms/uninitialized_move/constrained.cc:
3495         Likewise.
3496         * testsuite/20_util/specialized_algorithms/uninitialized_value_construct/constrained.cc:
3497         Likewise.
3498         * testsuite/23_containers/vector/cons/destructible_debug_neg.cc:
3499         Adjust dg-error line number.
3500
3501 2021-07-27  Jonathan Wakely  <jwakely@redhat.com>
3502
3503         * include/Makefile.am: Add bits/utility.h header.
3504         * include/Makefile.in: Regenerate.
3505         * include/bits/utility.h: New file.
3506         * include/std/utility (tuple_size, tuple_element): Move
3507         to new header.
3508         * include/std/type_traits (__is_tuple_like_impl<tuple<T...>>):
3509         Move to <tuple>.
3510         (_Index_tuple, _Build_index_tuple, integer_sequence): Likewise.
3511         (in_place_t, in_place_index_t, in_place_type_t): Likewise.
3512         * include/bits/ranges_util.h: Include new header instead of
3513         <utility>.
3514         * include/bits/stl_pair.h (tuple_size, tuple_element): Move
3515         partial specializations for std::pair here.
3516         (get): Move overloads for std::pair here.
3517         * include/std/any: Include new header instead of <utility>.
3518         * include/std/array: Likewise.
3519         * include/std/memory_resource: Likewise.
3520         * include/std/optional: Likewise.
3521         * include/std/variant: Likewise.
3522         * include/std/tuple: Likewise.
3523         (__is_tuple_like_impl<tuple<T...>>): Move here.
3524         (get) Declare overloads for std::array.
3525         * include/std/version (__cpp_lib_tuples_by_type): Change type
3526         to long.
3527         * testsuite/20_util/optional/84601.cc: Include <utility>.
3528         * testsuite/20_util/specialized_algorithms/uninitialized_fill/constrained.cc:
3529         Likewise.
3530         * testsuite/23_containers/array/tuple_interface/get_neg.cc:
3531         Adjust dg-error line numbers.
3532         * testsuite/std/ranges/access/cbegin.cc: Include <utility>.
3533         * testsuite/std/ranges/access/cend.cc: Likewise.
3534         * testsuite/std/ranges/access/end.cc: Likewise.
3535         * testsuite/std/ranges/single_view.cc: Likewise.
3536
3537 2021-07-23  Jonathan Wakely  <jwakely@redhat.com>
3538
3539         * include/std/future: Include <bits/atomic_base.h> instead of
3540         <atomic>.
3541
3542 2021-07-23  Jonathan Wakely  <jwakely@redhat.com>
3543
3544         * include/bits/stl_relops.h: Update documentation comments.
3545
3546 2021-07-22  Jonathan Wakely  <jwakely@redhat.com>
3547
3548         PR libstdc++/101583
3549         * include/bits/hashtable.h (_Hashtable): Replace mixin with
3550         _Enable_default_ctor. Construct it explicitly in all
3551         non-forwarding, non-defaulted constructors.
3552         * testsuite/23_containers/unordered_map/cons/default.cc: Check
3553         non-default constructors can be used.
3554         * testsuite/23_containers/unordered_set/cons/default.cc:
3555         Likewise.
3556
3557 2021-07-22  David Edelsohn  <dje.gcc@gmail.com>
3558
3559         * config/os/aix/os_defines.h (__LIBC_NO_CPP_MATH_OVERLOADS__): Define.
3560
3561 2021-07-22  Jonathan Wakely  <jwakely@redhat.com>
3562
3563         PR libstdc++/94295
3564         * include/ext/new_allocator.h (_GLIBCXX_OPERATOR_NEW)
3565         (_GLIBCXX_OPERATOR_DELETE, _GLIBCXX_SIZED_DEALLOC): Define.
3566         (allocator::allocate, allocator::deallocate): Use new macros.
3567
3568 2021-07-22  Jonathan Wakely  <jwakely@redhat.com>
3569
3570         PR libstdc++/101571
3571         * include/bits/ranges_uninitialized.h (_DestroyGuard): Change
3572         constructor parameter to reference and use addressof.
3573         * testsuite/util/testsuite_iterators.h: Define deleted operator&
3574         overloads for test iterators.
3575
3576 2021-07-22  Jonathan Wakely  <jwakely@redhat.com>
3577
3578         * include/bits/std_function.h (_Function_base): Add
3579         default member initializers and define constructor as defaulted.
3580         (function::_M_invoker): Add default member initializer.
3581
3582 2021-07-22  Jonathan Wakely  <jwakely@redhat.com>
3583
3584         PR libstdc++/100682
3585         * doc/xml/manual/debug_mode.xml: Update documentation about
3586         debug capability of std::array.
3587         * doc/html/*: Regenerate.
3588         * include/debug/array: New file.
3589
3590 2021-07-21  Jonathan Wakely  <jwakely@redhat.com>
3591
3592         PR libstdc++/101542
3593         * include/ext/rope (sequence_buffer): Add move constructor and
3594         move assignment operator.
3595         * testsuite/ext/rope/101542.cc: New test.
3596
3597 2021-07-20  Jonathan Wakely  <jwakely@redhat.com>
3598
3599         PR libstdc++/101510
3600         * src/c++17/fs_ops.cc (fs::create_directories): Use status
3601         instead of symlink_status.
3602         * src/filesystem/ops.cc (fs::create_directories): Likewise.
3603         * testsuite/27_io/filesystem/operations/create_directories.cc:
3604         Check symlink to existing directory.
3605         * testsuite/27_io/filesystem/operations/create_directory.cc: Do
3606         not test with symlinks on Windows.
3607         * testsuite/experimental/filesystem/operations/create_directories.cc:
3608         Check symlink to existing directory.
3609         * testsuite/experimental/filesystem/operations/create_directory.cc:
3610         Do not test with symlinks on Windows.
3611
3612 2021-07-20  Jonathan Wakely  <jwakely@redhat.com>
3613
3614         PR libstdc++/100863
3615         * include/bits/hashtable.h (_Hashtable): Conditionally delete
3616         default constructor by deriving from _Enable_special_members.
3617         * testsuite/23_containers/unordered_map/cons/default.cc: New test.
3618         * testsuite/23_containers/unordered_set/cons/default.cc: New test.
3619
3620 2021-07-20  Jonathan Wakely  <jwakely@redhat.com>
3621
3622         PR libstdc++/101510
3623         * src/c++17/fs_ops.cc (create_dir): Adjust whitespace.
3624         * testsuite/27_io/filesystem/operations/create_directory.cc:
3625         Test creating directory with name of existing symlink to
3626         directory.
3627         * testsuite/experimental/filesystem/operations/create_directory.cc:
3628         Likewise.
3629
3630 2021-07-16  Jonathan Wakely  <jwakely@redhat.com>
3631
3632         * include/std/tuple (get<I>): Add deleted overload for bad
3633         index.
3634         * testsuite/20_util/tuple/element_access/get_neg.cc: Adjust
3635         expected errors.
3636
3637 2021-07-16  Jonathan Wakely  <jwakely@redhat.com>
3638
3639         * include/bits/max_size_type.h (numeric_limits<__max_size_type>):
3640         Use __int_traits unconditionally.
3641
3642 2021-07-16  Jonathan Wakely  <jwakely@redhat.com>
3643
3644         * include/bits/random.h (_Shift::__value): Use constexpr.
3645         (_Select_uint_least_t::type): Use using-declaration.
3646         (_Mod): Likewise.
3647         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error
3648         line number.
3649
3650 2021-07-16  Jonathan Wakely  <jwakely@redhat.com>
3651
3652         * include/bits/cpp_type_traits.h (__INT_N): Use __extension__
3653         instead of diagnostic pragmas.
3654         * include/bits/functional_hash.h: Likewise.
3655         * include/bits/iterator_concepts.h (__is_signed_int128)
3656         (__is_unsigned_int128): Likewise.
3657         * include/bits/max_size_type.h (__max_size_type): Likewise.
3658         (numeric_limits<__max_size_type>): Likewise.
3659         * include/bits/std_abs.h (abs): Likewise.
3660         * include/bits/stl_algobase.h (__size_to_integer): Likewise.
3661         * include/bits/uniform_int_dist.h (uniform_int_distribution):
3662         Likewise.
3663         * include/ext/numeric_traits.h (_GLIBCXX_INT_N_TRAITS):
3664         Likewise.
3665         * include/std/type_traits (__is_integral_helper<INT_N>)
3666         (__is_signed_integer, __is_unsigned_integer)
3667         (__make_unsigned<INT_N>, __make_signed<INT_N>): Likewise.
3668         * include/std/limits (__INT_N): Add __extension__ keyword.
3669         * include/bits/random.h (_Select_uint_least_t)
3670         (random_device): Likewise.
3671
3672 2021-07-16  Patrick Palka  <ppalka@redhat.com>
3673
3674         PR libstdc++/101231
3675         * include/std/ranges (_CachedPosition::_M_get): For non-forward
3676         ranges, just call __builtin_unreachable.
3677         * testsuite/std/ranges/istream_view.cc (test05): New test.
3678
3679 2021-07-16  Patrick Palka  <ppalka@redhat.com>
3680
3681         PR libstdc++/101214
3682         * include/std/ranges (split_view::split_view): Use std::move.
3683         (split_view::_Iterator::_Iterator): Remove redundant
3684         default_initializable constraint.
3685         (split_view::_Sentinel::_Sentinel): Declare.
3686         * testsuite/std/ranges/adaptors/split.cc (test02): New test.
3687
3688 2021-07-16  Marek Polacek  <polacek@redhat.com>
3689
3690         * testsuite/20_util/ratio/operations/ops_overflow_neg.cc: Add
3691         dg-error.
3692
3693 2021-07-16  Jonathan Wakely  <jwakely@redhat.com>
3694
3695         * include/bits/unique_ptr.h: Adjust doxygen markup.
3696
3697 2021-07-16  Jonathan Wakely  <jwakely@redhat.com>
3698
3699         PR libstdc++/101307
3700         * include/std/type_traits: Adjust doxygen markup.
3701
3702 2021-07-16  Jonathan Wakely  <jwakely@redhat.com>
3703
3704         * include/bits/cpp_type_traits.h: Add diagnostic pragmas around
3705         uses of non-standard integer types.
3706         * include/bits/functional_hash.h: Likewise.
3707         * include/bits/iterator_concepts.h: Likewise.
3708         * include/bits/max_size_type.h: Likewise.
3709         * include/bits/std_abs.h: Likewise.
3710         * include/bits/stl_algobase.h: Likewise.
3711         * include/bits/uniform_int_dist.h: Likewise.
3712         * include/ext/numeric_traits.h: Likewise.
3713         * include/std/type_traits: Likewise.
3714
3715 2021-07-15  Jonathan Wakely  <jwakely@redhat.com>
3716
3717         PR libstdc++/101427
3718         * include/std/tuple (tuple_element): Improve static_assert text.
3719         (__get_helper): Add deleted overload.
3720         (get<i>(tuple<T...>&&), get<i>(const tuple<T...>&&)): Use
3721         __get_helper directly.
3722         (__get_helper2): Remove.
3723         (__find_uniq_type_in_pack): New constexpr helper function.
3724         (get<T>): Use __find_uniq_type_in_pack and __get_helper instead
3725         of __get_helper2.
3726         * testsuite/20_util/tuple/element_access/get_neg.cc: Adjust
3727         expected errors.
3728         * testsuite/20_util/tuple/element_access/101427.cc: New test.
3729
3730 2021-07-15  Jonathan Wakely  <jwakely@redhat.com>
3731
3732         PR libstdc++/101429
3733         * include/bits/c++config (__replacement_assert): Add noexcept.
3734         [!_GLIBCXX_VERBOSE] (__glibcxx_assert_impl): Use __builtin_abort
3735         instead of __replacement_assert.
3736
3737 2021-07-14  Jonathan Wakely  <jwakely@redhat.com>
3738
3739         * include/std/string_view (basic_string_view(It, End)): Add
3740         noexcept-specifier.
3741         * testsuite/21_strings/basic_string_view/cons/char/range.cc:
3742         Check noexcept-specifier. Also check construction without CTAD.
3743
3744 2021-07-13  Jonathan Wakely  <jwakely@redhat.com>
3745
3746         PR c++/101361
3747         * include/std/string_view (ends_with): Use traits_type::compare
3748         directly.
3749
3750 2021-07-13  Jonathan Wakely  <jwakely@redhat.com>
3751
3752         * include/std/string_view: Only include <bits/ranges_base.h>
3753         once, and only for C++20 and later.
3754
3755 2021-07-12  Jonathan Wakely  <jwakely@redhat.com>
3756
3757         PR libstdc++/101411
3758         * include/std/span (as_writable_bytes): Add requires-clause.
3759         * testsuite/23_containers/span/101411.cc: New test.
3760
3761 2021-07-09  Matheus Castanho  <msc@linux.ibm.com>
3762
3763         * include/std/mutex (__lock_impl): Check
3764         _GLIBCXX_HAS_GTHREADS before using __gthread_yield.
3765
3766 2021-07-02  Jonathan Wakely  <jwakely@redhat.com>
3767
3768         PR libstdc++/101271
3769         * include/bits/unique_ptr.h (unique_ptr<T[],D>::operator[]):
3770         Remove noexcept-specifier.
3771         (unique_ptr<T[],D>::_S_nothrow_deref): Remove.
3772         * testsuite/20_util/unique_ptr/lwg2762.cc: Remove checks for
3773         operator[].
3774
3775 2021-07-01  Jonathan Wakely  <jwakely@redhat.com>
3776
3777         * doc/doxygen/doxygroups.cc: Fix docs for std::literals.
3778         * doc/doxygen/user.cfg.in: Exclude the Networking TS header.
3779         Add some more predefined macros.
3780         * include/bits/fs_fwd.h: Move @addtogroup commands inside
3781         namespaces. Add better documentation.
3782         * include/bits/fs_path.h: Likewise.
3783         * include/experimental/bits/fs_fwd.h: Likewise.
3784         * include/experimental/bits/fs_path.h: Likewise.
3785         * include/ext/throw_allocator.h: Fix typo and improve docs.
3786         * include/std/chrono: Move @addtogroup commands.
3787         * include/std/system_error: Move @addtogroup commands.
3788         * libsupc++/exception: Improve documentation.
3789         * libsupc++/exception.h: Add @since documentation.
3790
3791 2021-06-30  Jonathan Wakely  <jwakely@redhat.com>
3792
3793         PR libstdc++/101258
3794         * doc/doxygen/user.cfg.in (INPUT): Add <experimental/simd>.
3795         (COLS_IN_ALPHA_INDEX): Remove obsolete tag.
3796         (PREDEFINED): Add/fix some more macros that need to be expanded.
3797         * include/bits/random.h: Stop Doxygen from documenting internal
3798         implementation details.
3799         * include/bits/random.tcc: Likewise.
3800         * include/bits/this_thread_sleep.h: Fix @file name.
3801         * include/experimental/bits/simd.h: Add to Doxygen group. Do not
3802         document internal implementation details.
3803         * include/experimental/bits/simd_detail.h: Do not document
3804         internal implementation details.
3805         * include/experimental/simd: Define Doxygen groups.
3806         * include/experimental/type_traits: Improve documentation for
3807         the header file. Define groups. Use @since commands.
3808         * include/std/scoped_allocator (scoped_allocator_adaptor): Move
3809         declaration before undocumented region.
3810         * include/std/type_traits (true_type, false_type): Use using
3811         declaration instead of typedef.
3812         (is_invocable_v, is_nothrow_invocable_v, is_invocable_r_v)
3813         (is_nothrow_invocable_r_v): Move definitions next to other C++17
3814         variable templates.
3815         Do not document internal implementation details. Move misplaced
3816         group-end command. Define group for variable templates.
3817         * include/std/variant: Do not document internal implementation
3818         details.
3819         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error
3820         line number.
3821
3822 2021-06-30  Jonathan Wakely  <jwakely@redhat.com>
3823
3824         * include/experimental/simd: Do not define anything pre-C++17.
3825
3826 2021-06-30  Jonathan Wakely  <jwakely@redhat.com>
3827
3828         * include/bits/random.tcc [__cpp_inline_variables]: Remove
3829         redundant definitions of static constexpr member variables.
3830         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error
3831         line number.
3832
3833 2021-06-28  Jonathan Wakely  <jwakely@redhat.com>
3834
3835         * include/bits/streambuf.tcc (__copy_streambufs_eof): Remove
3836         explicit instantiation declarations.
3837         * src/c++11/streambuf-inst.cc (__copy_streambufs_eof): Remove
3838         explicit instantiation definitions.
3839
3840 2021-06-28  Jonathan Wakely  <jwakely@redhat.com>
3841
3842         PR libstdc++/97088
3843         * testsuite/17_intro/names.cc: Fix #if condition for names used
3844         by newlib headers.
3845
3846 2021-06-28  Jonathan Wakely  <jwakely@redhat.com>
3847
3848         PR libstdc++/101236
3849         * include/bits/unique_ptr.h (unique_ptr<T[], D>::operator[]):
3850         Fail gracefully if element_type is incomplete.
3851         * testsuite/20_util/unique_ptr/cons/incomplete.cc: Clarify that
3852         the standard doesn't require this test to work for array types.
3853         * testsuite/20_util/unique_ptr/lwg2762.cc: Check that incomplete
3854         types can be used with array specialization.
3855         * testsuite/20_util/unique_ptr/101236.cc: New test.
3856
3857 2021-06-28  Jonathan Wakely  <jwakely@redhat.com>
3858
3859         * doc/xml/manual/intro.xml: Document LWG 415 change.
3860         * doc/html/manual/bugs.html: Regenerate.
3861         * include/bits/istream.tcc (ws): Create sentry and catch
3862         exceptions.
3863         * testsuite/27_io/basic_istream/ws/char/lwg415.cc: New test.
3864         * testsuite/27_io/basic_istream/ws/wchar_t/lwg415.cc: New test.
3865
3866 2021-06-25  Jonathan Wakely  <jwakely@redhat.com>
3867
3868         * include/bits/ostream.tcc (basic_ostream::write): Call sputn
3869         directly instead of using _M_write. Do setstate(__err) all
3870         outside the try-catch block.
3871         * include/std/ostream (basic_ostream::_M_write): Declare
3872         private. Use __ostream_insert. Do not define for the versioned
3873         namespace.
3874
3875 2021-06-25  Jonathan Wakely  <jwakely@redhat.com>
3876
3877         * doc/xml/manual/intro.xml: Document LWG 581 change.
3878         * doc/html/manual/bugs.html: Regenerate.
3879         * include/bits/basic_ios.tcc: Whitespace.
3880         * include/bits/ostream.tcc (basic_ostream::flush()): Construct
3881         sentry.
3882         * testsuite/27_io/basic_ostream/flush/char/2.cc: Check
3883         additional cases.
3884         * testsuite/27_io/basic_ostream/flush/char/exceptions_badbit_throw.cc:
3885         Likewise.
3886         * testsuite/27_io/basic_ostream/flush/wchar_t/2.cc: Likewise.
3887         * testsuite/27_io/basic_ostream/flush/wchar_t/exceptions_badbit_throw.cc:
3888         Likewise.
3889
3890 2021-06-25  Jonathan Wakely  <jwakely@redhat.com>
3891
3892         * include/bits/ostream.tcc (sentry): Only set failbit if badbit
3893         is set, not if eofbit is set.
3894         (tellp, seekp, seekp): Create sentry object. Do not set badbit
3895         on exceptions.
3896         * testsuite/27_io/basic_ostream/seekp/char/exceptions_badbit_throw.cc:
3897         Adjust expected behaviour.
3898         * testsuite/27_io/basic_ostream/seekp/wchar_t/exceptions_badbit_throw.cc:
3899         Likewise.
3900         * testsuite/27_io/basic_ostream/tellp/char/exceptions_badbit_throw.cc:
3901         Likewise.
3902         * testsuite/27_io/basic_ostream/tellp/wchar_t/exceptions_badbit_throw.cc:
3903         Likewise.
3904         * testsuite/27_io/basic_ostream/seekp/char/n3168.cc: New test.
3905         * testsuite/27_io/basic_ostream/seekp/wchar_t/n3168.cc: New test.
3906         * testsuite/27_io/basic_ostream/tellp/char/n3168.cc: New test.
3907         * testsuite/27_io/basic_ostream/tellp/wchar_t/n3168.cc: New test.
3908
3909 2021-06-25  Jonathan Wakely  <jwakely@redhat.com>
3910
3911         * include/std/syncstream (basic_syncbuf::swap()): Remove
3912         noexcept, as per LWG 3498.
3913
3914 2021-06-25  Jonathan Wakely  <jwakely@redhat.com>
3915
3916         PR libstdc++/97088
3917         * testsuite/17_intro/names.cc: Undef more names for newlib and
3918         also for arm-none-linux-gnueabi.
3919         * testsuite/experimental/names.cc: Disable PCH.
3920
3921 2021-06-25  Matthias Kretz  <m.kretz@gsi.de>
3922
3923         * include/experimental/bits/simd.h (__bit_cast): Implement via
3924         __builtin_bit_cast #if available.
3925         (__proposed::simd_bit_cast): Add overloads for simd and
3926         simd_mask, which use __builtin_bit_cast (or __bit_cast #if not
3927         available), which return an object of the requested type with
3928         the same bits as the argument.
3929         * include/experimental/bits/simd_math.h: Use simd_bit_cast
3930         instead of __bit_cast to allow casts to fixed_size_simd.
3931         (copysign): Remove branch that was only required if __bit_cast
3932         cannot be constexpr.
3933         * testsuite/experimental/simd/tests/bits/test_values.h: Switch
3934         from __bit_cast to __proposed::simd_bit_cast since the former
3935         will not cast fixed_size objects anymore.
3936
3937 2021-06-24  Matthias Kretz  <m.kretz@gsi.de>
3938
3939         * include/experimental/bits/simd_math.h
3940         (_GLIBCXX_SIMD_MATH_CALL2_): Rename arg2_ to __arg2.
3941         (_GLIBCXX_SIMD_MATH_CALL3_): Rename arg2_ to __arg2 and arg3_ to
3942         __arg3.
3943
3944 2021-06-24  Matthias Kretz  <m.kretz@gsi.de>
3945
3946         * include/experimental/bits/simd.h (__execute_on_index_sequence)
3947         (__execute_on_index_sequence_with_return)
3948         (__call_with_n_evaluations, __call_with_subscripts): Add flatten
3949         attribute.
3950
3951 2021-06-24  Matthias Kretz  <m.kretz@gsi.de>
3952
3953         * include/experimental/bits/simd_x86.h (_S_trunc, _S_floor)
3954         (_S_ceil): Set bit 8 (_MM_FROUND_NO_EXC) on AVX and SSE4.1
3955         roundp[sd] calls.
3956
3957 2021-06-24  Matthias Kretz  <m.kretz@gsi.de>
3958
3959         * include/experimental/bits/simd_x86.h (_S_ldexp): The AVX512F
3960         implementation doesn't require a _VecBltnBtmsk ABI tag, it
3961         requires either a 64-Byte input (in which case AVX512F must be
3962         available) or AVX512VL.
3963
3964 2021-06-24  Matthias Kretz  <m.kretz@gsi.de>
3965
3966         * include/experimental/bits/simd_math.h: Undefine internal
3967         macros after use.
3968         (frexp): Move #if to a more sensible position and reformat
3969         preceding code.
3970         (logb): Call _SimdImpl::_S_logb for fixed_size instead of
3971         duplicating the code here.
3972         (modf): Simplify condition.
3973
3974 2021-06-24  Matthias Kretz  <m.kretz@gsi.de>
3975
3976         * include/experimental/bits/simd_math.h (fabs): Remove
3977         fabs(simd<integral>) overload.
3978
3979 2021-06-24  Matthias Kretz  <m.kretz@gsi.de>
3980
3981         * include/experimental/bits/simd_converter.h
3982         (_SimdConverter::operator()): Pass _SimdTuple by const-ref.
3983         * include/experimental/bits/simd_fixed_size.h
3984         (_GLIBCXX_SIMD_FIXED_OP): Pass binary operator _SimdTuple
3985         arguments by const-ref.
3986         (_S_masked_unary): Pass _SimdTuple by const-ref.
3987
3988 2021-06-24  Matthias Kretz  <m.kretz@gsi.de>
3989
3990         * include/experimental/bits/simd_fixed_size.h
3991         (_AbisInSimdTuple): Removed.
3992
3993 2021-06-24  Matthias Kretz  <m.kretz@gsi.de>
3994
3995         * include/experimental/bits/simd.h: Add missing operator~
3996         overload for simd<floating-point> to __float_bitwise_operators.
3997         * include/experimental/bits/simd_builtin.h
3998         (_SimdImplBuiltin::_S_complement): Bitcast to int (and back) to
3999         implement complement for floating-point vectors.
4000         * include/experimental/bits/simd_fixed_size.h
4001         (_SimdImplFixedSize::_S_copysign): New function, forwarding to
4002         copysign implementation of _SimdTuple members.
4003         * include/experimental/bits/simd_math.h (copysign): Call
4004         _SimdImpl::_S_copysign for fixed_size arguments. Simplify
4005         generic copysign implementation using the new ~ operator.
4006
4007 2021-06-24  Jonathan Wakely  <jwakely@redhat.com>
4008
4009         * testsuite/experimental/simd/README.md: Fix typos.
4010
4011 2021-06-24  Jonathan Wakely  <jwakely@redhat.com>
4012
4013         * include/bits/shared_ptr_base.h (__shared_ptr_access::operator[]):
4014         Add noexcept.
4015         * include/bits/unique_ptr.h (unique_ptr::operator*): Add
4016         conditional noexcept as per LWG 2762.
4017         * testsuite/20_util/shared_ptr/observers/array.cc: Check that
4018         dereferencing cannot throw.
4019         * testsuite/20_util/shared_ptr/observers/get.cc: Likewise.
4020         * testsuite/20_util/optional/observers/lwg2762.cc: New test.
4021         * testsuite/20_util/unique_ptr/lwg2762.cc: New test.
4022
4023 2021-06-23  Patrick Palka  <ppalka@redhat.com>
4024
4025         PR c++/101174
4026         * testsuite/23_containers/multiset/cons/deduction.cc:
4027         Uncomment CTAD example that was rejected by this bug.
4028         * testsuite/23_containers/set/cons/deduction.cc: Likewise.
4029
4030 2021-06-23  Jonathan Wakely  <jwakely@redhat.com>
4031
4032         * include/std/chrono (chrono::year::is_leap()): Fix incorrect
4033         logic in comment.
4034
4035 2021-06-23  Matthias Kretz  <m.kretz@gsi.de>
4036
4037         * testsuite/experimental/simd/README.md: New file.
4038
4039 2021-06-23  Matthias Kretz  <m.kretz@gsi.de>
4040
4041         * testsuite/experimental/simd/driver.sh: Rewrite output
4042         verbosity logic. Add -p/--percentage option. Allow -v/--verbose
4043         to be used twice. Add -x and -o short options. Parse long
4044         options with = instead of separating space generically. Parce
4045         contracted short options. Make unrecognized options an error.
4046         If same-line output is active, trap on EXIT to increment the
4047         progress (only with --percentage), erase the line and print the
4048         current status.
4049         * testsuite/experimental/simd/generate_makefile.sh: Initialize
4050         helper files for progress account keeping. Update help target
4051         for changes to DRIVEROPTS.
4052
4053 2021-06-23  Matthias Kretz  <m.kretz@gsi.de>
4054
4055         * testsuite/Makefile.am (check-simd): Remove -fno-tree-vrp flag
4056         and associated warning.
4057         * testsuite/Makefile.in: Regenerate.
4058
4059 2021-06-23  Cassio Neri  <cassio.neri@gmail.com>
4060             Jonathan Wakely  <jwakely@redhat.com>
4061             Ulrich Drepper  <drepper@redhat.com>
4062
4063         * include/std/chrono (chrono::year::is_leap()): Optimize.
4064
4065 2021-06-23  Patrick Palka  <ppalka@redhat.com>
4066
4067         PR c++/86439
4068         * testsuite/23_containers/map/cons/deduction.cc: Replace ambiguous
4069         CTAD examples.
4070         * testsuite/23_containers/multimap/cons/deduction.cc: Likewise.
4071         * testsuite/23_containers/multiset/cons/deduction.cc: Likewise.
4072         Mention one of the replaced examples is broken due to PR101174.
4073         * testsuite/23_containers/set/cons/deduction.cc: Likewise.
4074         * testsuite/23_containers/unordered_map/cons/deduction.cc: Replace
4075         ambiguous CTAD examples.
4076         * testsuite/23_containers/unordered_multimap/cons/deduction.cc:
4077         Likewise.
4078         * testsuite/23_containers/unordered_multiset/cons/deduction.cc:
4079         Likewise.
4080         * testsuite/23_containers/unordered_set/cons/deduction.cc: Likewise.
4081
4082 2021-06-23  Jonathan Wakely  <jwakely@redhat.com>
4083
4084         * include/std/mutex (__detail::__try_lock_impl): Rename
4085         parameter to avoid clashing with newlib's __lockable macro.
4086         (try_lock): Add 'inline' specifier.
4087         * testsuite/17_intro/names.cc: Add check for __lockable.
4088         * testsuite/30_threads/try_lock/5.cc: Add options for pthreads.
4089
4090 2021-06-22  Jonathan Wakely  <jwakely@redhat.com>
4091             Matthias Kretz  <m.kretz@gsi.de>
4092
4093         * include/std/mutex (lock): Replace recursion with iteration
4094         when lockables all have the same type.
4095         (__detail::__try_lock_impl): Likewise. Pass lockables as
4096         parameters, instead of a tuple. Always lock the first one, and
4097         recurse for the rest.
4098         (__detail::__lock_impl): Adjust call to __try_lock_impl.
4099         (__detail::__try_to_lock): Remove.
4100         * testsuite/30_threads/lock/3.cc: Check that mutexes are locked.
4101         * testsuite/30_threads/lock/4.cc: Also test non-heterogeneous
4102         arguments.
4103         * testsuite/30_threads/unique_lock/cons/60497.cc: Also check
4104         std::try_lock.
4105         * testsuite/30_threads/try_lock/5.cc: New test.
4106
4107 2021-06-22  Jonathan Wakely  <jwakely@redhat.com>
4108
4109         * include/std/memory (declare_reachable, undeclare_reachable)
4110         (declare_no_pointers, undeclare_no_pointers, get_pointer_safety)
4111         (pointer_safety): Only define for C++11 to C++20 inclusive.
4112         * testsuite/20_util/pointer_safety/1.cc: Do not run for C++23.
4113
4114 2021-06-22  Jonathan Wakely  <jwakely@redhat.com>
4115
4116         * include/bits/random.h (seed_seq): Constrain initializer-list
4117         constructor.
4118         * include/bits/random.tcc (seed_seq): Add template parameter.
4119         * testsuite/26_numerics/random/seed_seq/cons/default.cc: Check
4120         for noexcept.
4121         * testsuite/26_numerics/random/seed_seq/cons/initlist.cc: Check
4122         constraints.
4123
4124 2021-06-22  Thomas Rodgers  <rodgert@appliantology.com>
4125
4126         PR libstdc++/100806
4127         * include/bits/semaphore_base.h (__atomic_semaphore::_M_release):
4128         Force _M_release() to wake all waiting threads.
4129         * testsuite/30_threads/semaphore/100806.cc: New test.
4130
4131 2021-06-21  Jonathan Wakely  <jwakely@redhat.com>
4132
4133         * include/std/mutex (__try_to_lock): Move to __detail namespace.
4134         (struct __try_lock_impl): Replace with ...
4135         (__detail::__try_lock_impl<Idx>(tuple<Lockables...>&)): New
4136         function templates to implement std::try_lock.
4137         (try_lock): Use new __try_lock_impl.
4138         (__detail::__lock_impl(int, int&, L0&, L1&...)): New function
4139         template to implement std::lock.
4140         (lock): Use __lock_impl.
4141
4142 2021-06-21  Patrick Palka  <ppalka@redhat.com>
4143
4144         * include/bits/ranges_cmp.h (__cpp_lib_ranges): Adjust value.
4145
4146 2021-06-20  Patrick Palka  <ppalka@redhat.com>
4147
4148         * include/std/ranges (__non_propagating_cache::operator bool):
4149         Define for split_view::begin().
4150         (split_view): Define as per P2210.
4151         (views::__detail::__can_split_view): Define.
4152         (views::_Split, views::split): Define.
4153         * testsuite/std/ranges/adaptors/100577.cc (test01, test02):
4154         Test views::split.
4155         * testsuite/std/ranges/adaptors/split.cc: New test.
4156         * testsuite/std/ranges/p2325.cc (test08a): New test.
4157         * testsuite/std/ranges/p2367.cc (test01): Test views::split.
4158
4159 2021-06-20  Patrick Palka  <ppalka@redhat.com>
4160
4161         * include/std/ranges: Rename views::split to views::lazy_split,
4162         split_view to lazy_split_view, etc. throughout.
4163         * testsuite/std/ranges/*: Likewise.
4164         * testsuite/std/ranges/adaptors/lazy_split.cc: New file.
4165         * testsuite/std/ranges/adaptors/lazy_split_neg.cc: New file.
4166
4167 2021-06-20  Patrick Palka  <ppalka@redhat.com>
4168
4169         * include/std/ranges (split_view::_OuterIter::__at_end):
4170         Check _M_trailing_empty.
4171         (split_view::_OuterIter::_M_trailing_empty): Define this
4172         data member.
4173         (split_view::_OuterIter::operator++): Set _M_trailing_empty
4174         appropriately.
4175         (split_view::_OuterIter::operator==): Compare
4176         _M_trailing_empty.
4177         * testsuite/std/ranges/adaptors/100479.cc (test03): Expect two
4178         split parts instead of one.
4179         * testsuite/std/ranges/adaptors/split.cc (test11): New test.
4180
4181 2021-06-20  Patrick Palka  <ppalka@redhat.com>
4182
4183         * include/std/ranges (split_view::_InnerIter::base): Define as
4184         per P2210.
4185
4186 2021-06-19  Patrick Palka  <ppalka@redhat.com>
4187
4188         * include/std/ranges (transform_view::_Iterator::_S_iter_concept):
4189         Consider _Base instead of _Vp as per LWG 3555.
4190         (elements_view::_Iterator::_S_iter_concept): Likewise.
4191
4192 2021-06-19  Patrick Palka  <ppalka@redhat.com>
4193
4194         * include/std/ranges (split_view::_OuterIter::value_type::begin):
4195         Remove the non-const overload, and remove the copyable constraint
4196         on the const overload as per LWG 3553.
4197
4198 2021-06-19  Patrick Palka  <ppalka@redhat.com>
4199
4200         * include/bits/stl_iterator.h
4201         (__detail::__common_iter_use_postfix_proxy): Add
4202         move_constructible constraint as per LWG 3546.
4203         (common_iterator::__postfix_proxy): Adjust initializer of
4204         _M_keep as per LWG 3546.
4205
4206 2021-06-18  Patrick Palka  <ppalka@redhat.com>
4207
4208         PR libstdc++/100387
4209         * include/bits/ranges_algo.h (__minmax_fn::operator()): Rewrite
4210         to limit comparison complexity to 3*N/2.
4211         (__minmax_element_fn::operator()): Likewise.
4212         (shift_right): Avoid premature std::move of __result.
4213         * testsuite/25_algorithms/minmax/constrained.cc (test04, test05):
4214         New tests.
4215         * testsuite/25_algorithms/minmax_element/constrained.cc (test02):
4216         Likewise.
4217
4218 2021-06-18  Patrick Palka  <ppalka@redhat.com>
4219
4220         * include/std/concepts (convertible_to): Just use declval as per
4221         LWG 3557.
4222
4223 2021-06-18  Jonathan Wakely  <jwakely@redhat.com>
4224
4225         PR libstdc++/95833
4226         * include/std/numeric (reduce(Iter, Iter, T, BinaryOp)): Replace
4227         incorrect static_assert with ones matching the 'Mandates'
4228         conditions in the standard.
4229         * testsuite/26_numerics/reduce/95833.cc: New test.
4230
4231 2021-06-18  Jonathan Wakely  <jwakely@redhat.com>
4232
4233         * testsuite/21_strings/basic_string/cons/char/1.cc: Use
4234         diagnostic pragma to suppress -Wstringop-overread error.
4235
4236 2021-06-18  Patrick Palka  <ppalka@redhat.com>
4237
4238         * include/bits/ranges_algo.h (__find_fn, find, __find_if_fn)
4239         (find_if, __find_if_not_fn, find_if_not, _in_in_result)
4240         (__mismatch_fn, mismatch, __search_fn, search): Move to ...
4241         * include/bits/ranges_util.h: ... here.
4242         * include/std/ranges (__detail::find, __detail::find_if)
4243         (__detail::find_if_not, __detail::mismatch): Remove.
4244         (filter_view): Use ranges::find_if instead.
4245         (drop_while_view): Use ranges::find_if_not instead.
4246         (split_view): Use ranges::find and ranges::mismatch instead.
4247
4248 2021-06-18  Patrick Palka  <ppalka@redhat.com>
4249
4250         * include/bits/iterator_concepts.h (weakly_incrementable): Remove
4251         default_initializable requirement.
4252         * include/bits/ranges_base.h (ranges::view): Likewise.
4253         * include/bits/ranges_util.h (subrange): Constrain the default
4254         ctor.
4255         * include/bits/stl_iterator.h (back_insert_iterator): Remove the
4256         default ctor.
4257         (front_insert_iterator): Likewise.
4258         (insert_iterator): Likewise.  Remove NSDMIs.
4259         (common_iterator): Constrain the default ctor.
4260         (counted_iterator): Likewise.
4261         * include/bits/stream_iterator.h (ostream_iterator): Remove the
4262         default ctor.
4263         * include/std/ranges (__detail::__box::operator=): Handle
4264         self-assignment in the primary template.
4265         (__detail::__box): In the partial specialization: adjust
4266         constraints as per P2325.  Add specialized operator= for the
4267         case when the wrapped type is not copyable.  Constrain the
4268         default ctor.  Avoid list-initialization.
4269         (single_view): Constraint the default ctor.
4270         (iota_view): Relax semiregular constraint to copyable.
4271         Constrain the default ctor.
4272         (iota_view::_Iterator): Constraint the default ctor.
4273         (basic_istream_view): Remove the default ctor.  Remove NSDMIs.
4274         Remove redundant checks for empty _M_stream.
4275         (basic_istream_view::_Iterator): Likewise.
4276         (ref_view): Remove the default ctor.  Remove NSDMIs.
4277         (ref_view::_Iterator): Constrain the default ctor.
4278         (__detail::__non_propagating_cache::operator=): Define overload
4279         for assigning from a value of the underlying type.
4280         (filter_view): Likewise.
4281         (filter_view::_Iterator): Likewise.
4282         (transform_view): Likewise.
4283         (transform_view::_Iterator): Likewise.
4284         (take_view): Likewise.
4285         (take_view::_Iterator): Likewise.
4286         (take_while_view): Likewise.
4287         (take_while_view::_Iterator): Likewise.
4288         (drop_while_view): Likewise.
4289         (drop_while_view::_Iterator): Likewise.
4290         (join_view): Likewise.
4291         (split_view::_OuterIter::__current): Adjust after changing the
4292         type of _M_current.
4293         (split_view::_M_current): Wrap it in a __non_propagating_cache.
4294         (split_view::split_view): Constrain the default ctor.
4295         (common_view): Constrain the default ctor.
4296         (reverse_view): Likewise.
4297         (elements_view): Likewise.
4298         * include/std/span (enable_view<span<_ElementType, _Extent>>):
4299         Define this partial specialization to true unconditionally.
4300         * include/std/version (__cpp_lib_ranges): Adjust value.
4301         * testsuite/24_iterators/back_insert_iterator/constexpr.cc:
4302         Don't attempt to default construct a back_insert_iterator.
4303         * testsuite/24_iterators/front_insert_iterator/constexpr.cc:
4304         Don't attempt to default construct a front_insert_iterator.
4305         * testsuite/24_iterators/insert_iterator/constexpr.cc:
4306         Don't attempt to default construct an insert_iterator.
4307         * testsuite/24_iterators/ostream_iterator/requirements/constexpr.cc:
4308         Remove this test for default constructibility of ostream_iterator.
4309         * testsuite/std/ranges/97600.cc: Don't attempt to default
4310         construct a basic_istream_view.
4311         * testsuite/std/ranges/adaptors/detail/semiregular_box.cc:
4312         Rename to ...
4313         * testsuite/std/ranges/adaptors/detail/copyable_box.cc: ... this.
4314         (test02): Adjust now that __box is copyable-box not
4315         semiregular-box.
4316         (test03): New test.
4317         * testsuite/std/ranges/p2325.cc: New test.
4318         * testsuite/std/ranges/single_view.cc (test06): New test.
4319         * testsuite/std/ranges/view.cc: Adjust now that view doesn't
4320         require default_initializable.
4321
4322 2021-06-17  Jonathan Wakely  <jwakely@redhat.com>
4323
4324         PR libstdc++/91488
4325         * include/bits/basic_string.h (__cpp_lib_constexpr_string): Only
4326         define when is_constant_evaluated is available.
4327         * include/bits/char_traits.h (__cpp_lib_constexpr_char_traits):
4328         Likewise.
4329         (__constant_string_p, __constant_array_p): Remove.
4330         (char_traits): Use is_constant_evaluated directly.
4331         * include/std/version (__cpp_lib_constexpr_char_traits)
4332         (__cpp_lib_constexpr_string): Only define when
4333         is_constant_evaluated is available.
4334
4335 2021-06-17  Patrick Palka  <ppalka@redhat.com>
4336
4337         PR libstdc++/100940
4338         * include/std/ranges (__adaptor::_Partial): For the "simple"
4339         forwarding partial specializations, also require that
4340         the extra arguments are trivially copyable.
4341         * testsuite/std/ranges/adaptors/100577.cc (test04): New test.
4342
4343 2021-06-17  Patrick Palka  <ppalka@redhat.com>
4344
4345         PR libstdc++/100940
4346         * include/std/ranges (__adaptor::_RangeAdaptor): Document the
4347         template form of _S_has_simple_extra_args.
4348         (__adaptor::__adaptor_has_simple_extra_args): Add _Args template
4349         parameter pack.  Try to treat _S_has_simple_extra_args as a
4350         variable template parameterized by _Args.
4351         (__adaptor::_Partial): Pass _Arg/_Args to the constraint
4352         __adaptor_has_simple_extra_args.
4353         (views::_Take::_S_has_simple_extra_args): Templatize according
4354         to the type of the extra argument.
4355         (views::_Drop::_S_has_simple_extra_args): Likewise.
4356         (views::_Split::_S_has_simple_extra_args): Define.
4357         * testsuite/std/ranges/adaptors/100577.cc (test01, test02):
4358         Adjust after changes to _S_has_simple_extra_args mechanism.
4359         (test03): Define.
4360
4361 2021-06-16  Jonathan Wakely  <jwakely@redhat.com>
4362
4363         * include/bits/iterator_concepts.h (__decay_copy): Name type.
4364
4365 2021-06-16  Jonathan Wakely  <jwakely@redhat.com>
4366
4367         * include/bits/ranges_base.h (ranges::begin, ranges::end)
4368         (ranges::cbegin, ranges::cend, ranges::rbeing, ranges::rend)
4369         (ranges::crbegin, ranges::crend, ranges::size, ranges::ssize)
4370         (ranges::empty, ranges::data, ranges::cdata): Remove final
4371         keywords and deleted operator& overloads.
4372         * testsuite/24_iterators/customization_points/iter_move.cc: Use
4373         new is_customization_point_object function.
4374         * testsuite/24_iterators/customization_points/iter_swap.cc:
4375         Likewise.
4376         * testsuite/std/concepts/concepts.lang/concept.swappable/swap.cc:
4377         Likewise.
4378         * testsuite/std/ranges/access/begin.cc: Likewise.
4379         * testsuite/std/ranges/access/cbegin.cc: Likewise.
4380         * testsuite/std/ranges/access/cdata.cc: Likewise.
4381         * testsuite/std/ranges/access/cend.cc: Likewise.
4382         * testsuite/std/ranges/access/crbegin.cc: Likewise.
4383         * testsuite/std/ranges/access/crend.cc: Likewise.
4384         * testsuite/std/ranges/access/data.cc: Likewise.
4385         * testsuite/std/ranges/access/empty.cc: Likewise.
4386         * testsuite/std/ranges/access/end.cc: Likewise.
4387         * testsuite/std/ranges/access/rbegin.cc: Likewise.
4388         * testsuite/std/ranges/access/rend.cc: Likewise.
4389         * testsuite/std/ranges/access/size.cc: Likewise.
4390         * testsuite/std/ranges/access/ssize.cc: Likewise.
4391         * testsuite/util/testsuite_iterators.h
4392         (is_customization_point_object): New function.
4393
4394 2021-06-15  Jonathan Wakely  <jwakely@redhat.com>
4395
4396         * include/bits/ranges_base.h (ranges::begin, ranges::end)
4397         (ranges::cbegin, ranges::cend, ranges::rbeing, ranges::rend)
4398         (ranges::crbegin, ranges::crend, ranges::size, ranges::ssize)
4399         (ranges::empty, ranges::data, ranges::cdata): Make types final.
4400         Add deleted operator& overloads.
4401         (ranges::advance, ranges::distance, ranges::next, ranges::prev):
4402         Likewise.
4403         * testsuite/std/ranges/headers/ranges/synopsis.cc: Replace
4404         ill-formed & expressions with using-declarations. Add checks for
4405         other function objects.
4406
4407 2021-06-15  Jonathan Wakely  <jwakely@redhat.com>
4408
4409         * include/bits/ranges_util.h (view_interface): Add noexcept to
4410         empty, operator bool, data and size members.
4411         (subrange): Add noexcept to constructors.
4412         * include/std/ranges (single_view, ref_view): Add noexcept to
4413         constructors.
4414         (views::single, views::all): Add noexcept.
4415         * testsuite/std/ranges/adaptors/all.cc: Check noexcept.
4416         * testsuite/std/ranges/single_view.cc: Likewise.
4417
4418 2021-06-15  Jonathan Wakely  <jwakely@redhat.com>
4419
4420         * include/bits/ranges_util.h (subrange): Add __size_type typedef
4421         and use it to simplify declarations.
4422         (subrange(i, s, n)): Remove assertion.
4423         * testsuite/std/ranges/subrange/constexpr.cc: New test.
4424
4425 2021-06-15  Jonathan Wakely  <jwakely@redhat.com>
4426
4427         * include/bits/iterator_concepts.h (__cust_access::__decay_copy):
4428         Replace with function object.
4429         (__cust_access::__member_begin, ___cust_access::_adl_begin): Use
4430         __decay_copy unqualified.
4431         * include/bits/ranges_base.h (__member_end, __adl_end):
4432         Likewise. Use __range_iter_t for type of ranges::begin.
4433         (__member_rend): Use correct value category for rbegin argument.
4434         (__member_data): Use __decay_copy unqualified.
4435         (__begin_data): Use __range_iter_t for type of ranges::begin.
4436
4437 2021-06-14  Jonathan Wakely  <jwakely@redhat.com>
4438
4439         * include/bits/ranges_base.h (ranges::empty): Check whether
4440         conversion to bool can throw.
4441         * testsuite/std/ranges/access/empty.cc: Check for correct
4442         noexcept-specifier.
4443
4444 2021-06-14  Jonathan Wakely  <jwakely@redhat.com>
4445
4446         PR libstdc++/100894
4447         * include/std/type_traits (__common_ref_impl<X&, Y&>): Only
4448         use the type if it's a reference.
4449         * testsuite/20_util/common_reference/100894.cc: New test.
4450
4451 2021-06-14  Jonathan Wakely  <jwakely@redhat.com>
4452
4453         * testsuite/experimental/filesystem/path/native/conv_c++23.cc:
4454         Add dg-require-filesystem-ts directive.
4455
4456 2021-06-14  Jonathan Wakely  <jwakely@redhat.com>
4457
4458         PR libstdc++/101034
4459         * include/std/any (any(in_place_t<T>, initializer_list<U>, A&&...))
4460         (any::emplace<T>(initializer_list<U>, A&&...)): Fix constraint
4461         to use lvalue.
4462         * testsuite/20_util/any/cons/101034.cc: New test.
4463
4464 2021-06-14  Jonathan Wakely  <jwakely@redhat.com>
4465
4466         * testsuite/17_intro/headers/c++2017/all_attributes.cc: Add
4467         -std=gnu++17 option.
4468
4469 2021-06-14  Jonathan Wakely  <jwakely@redhat.com>
4470
4471         PR libstdc++/101056
4472         * libsupc++/compare (compare_partial_order_fallback): Add
4473         constraint using reversed parameter order, as per LWG 3465.
4474         * testsuite/18_support/comparisons/algorithms/fallback.cc:
4475         Adjust expected result.
4476
4477 2021-06-14  Jonathan Wakely  <jwakely@redhat.com>
4478
4479         * libsupc++/compare (__decayed_same_as): New helper concept.
4480         (strong_order, weak_order, partial_order): Constrain with new
4481         concept instead of using static_assert.
4482         (compare_strong_order_fallback, compare_weak_order_fallback)
4483         (compare_partial_order_fallback): Likewise. Do not deduce return
4484         types. Remove redundant if-constexpr checks.
4485         * testsuite/18_support/comparisons/algorithms/fallback.cc: New test.
4486
4487 2021-06-14  Jonathan Wakely  <jwakely@redhat.com>
4488
4489         PR libstdc++/101055
4490         * include/std/tuple: Use reserved form of attribute name.
4491         * testsuite/17_intro/headers/c++2011/all_attributes.cc: Add
4492         check for no_unique_address.
4493         * testsuite/17_intro/headers/c++2014/all_attributes.cc:
4494         Likewise.
4495         * testsuite/17_intro/headers/c++2017/all_attributes.cc:
4496         Likewise.
4497
4498 2021-06-11  Jonathan Wakely  <jwakely@redhat.com>
4499
4500         * include/bits/fs_path.h (operator==, operator<=>): Use new
4501         _S_compare function.
4502         (path::_S_compare): New function to call path::compare in a
4503         context where path::iterator is complete.
4504         * include/experimental/bits/fs_path.h (operator<, operator==):
4505         Define after path::iterator is complete.
4506         * testsuite/27_io/filesystem/path/native/conv_c++23.cc: New
4507         test.
4508         * testsuite/experimental/filesystem/path/native/conv_c++23.cc:
4509         New test.
4510
4511 2021-06-09  Thomas Rodgers  <rodgert@appliantology.com>
4512
4513         * testsuite/29_atomics/atomic_ref/wait_notify.cc: Guard
4514         test logic with constexpr check for is_always_lock_free.
4515
4516 2021-06-09  Jonathan Wakely  <jwakely@redhat.com>
4517
4518         PR libstdc++/100982
4519         * include/std/optional (optional::operator=(const optional<U>&)):
4520         Fix value category used in is_assignable check.
4521         * testsuite/20_util/optional/assignment/100982.cc: New test.
4522
4523 2021-06-09  Jonathan Wakely  <jwakely@redhat.com>
4524
4525         * include/bits/allocator.h (allocator::is_always_equal): Deprecate.
4526         * include/bits/iterator_concepts.h (indirectly_readable_traits):
4527         Add LWG issue number to comment.
4528         * include/std/memory_resource (polymorphic_allocator::release):
4529         Deprecate.
4530         * testsuite/20_util/allocator/requirements/typedefs.cc: Add
4531         dg-warning for deprecation. Also check std::allocator<void>.
4532
4533 2021-06-08  Thomas Rodgers  <rodgert@appliantology.com>
4534
4535         PR libstdc++/100889
4536         * include/bits/atomic_base.h (atomic_ref<_Tp*>::wait):
4537         Change parameter type from _Tp to _Tp*.
4538         * testsuite/29_atomics/atomic_ref/wait_notify.cc: Extend
4539         coverage of types tested.
4540
4541 2021-06-08  Thomas Rodgers  <rodgert@appliantology.com>
4542
4543         * include/std/barrier (__tree_barrier::_M_arrive): Remove
4544         unnecessary hasher instantiation.
4545
4546 2021-06-08  Jonathan Wakely  <jwakely@redhat.com>
4547
4548         * include/experimental/propagate_const (swap): Constrain.
4549         * testsuite/experimental/propagate_const/swap/lwg3413.cc: New test.
4550
4551 2021-06-07  Avi Kivity  <avi@scylladb.com>
4552
4553         PR libstdc++/100900
4554         * include/std/ranges (elements_view::__iter_cat::_S_iter_cat):
4555         Add missing typename.
4556
4557 2021-06-07  Jonathan Wakely  <jwakely@redhat.com>
4558
4559         PR libstdc++/98842
4560         * include/std/optional (operator<=>(const optional<T>& const U&)):
4561         Add missing constraint and add workaround for template
4562         recursion.
4563         * testsuite/20_util/optional/relops/three_way.cc: Check that
4564         type without equality comparison cannot be compared when wrapped
4565         in std::optional.
4566
4567 2021-06-05  Jonathan Wakely  <jwakely@redhat.com>
4568
4569         PR libstdc++/100824
4570         * include/bits/ranges_base.h (_SSize): Return signed type.
4571         * testsuite/std/ranges/access/ssize.cc: Check with __int128.
4572
4573 2021-06-04  Jonathan Wakely  <jwakely@redhat.com>
4574
4575         * include/bits/ranges_base.h (_SSize): Return the result of
4576         ranges::size converted to the wider of make-signed-like-t<S> and
4577         ptrdiff_t, rather than the ranges different type.
4578         * testsuite/std/ranges/access/ssize.cc: Adjust expected result
4579         for an iota_view that uses an integer class type for its
4580         difference_type.
4581
4582 2021-06-04  Jonathan Wakely  <jwakely@redhat.com>
4583
4584         PR libstdc++/100824
4585         * include/bits/ranges_base.h (__member_data): Use __decay_copy.
4586         * testsuite/std/ranges/access/data.cc: Add testcase from PR.
4587
4588 2021-06-04  Jonathan Wakely  <jwakely@redhat.com>
4589
4590         PR libstdc++/100824
4591         * include/bits/iterator_concepts.h (__detail::__decay_copy)
4592         (__detail::__member_begin, __detail::__adl_begin): Move to
4593         namespace ranges::__cust_access.
4594         (__detail::__ranges_begin): Likewise, and rename to __begin.
4595         Remove redundant static assertion.
4596         * include/bits/ranges_base.h (_Begin, _End, _RBegin, _REnd):
4597         Use lvalue in noexcept specifier.
4598         (__as_const): Add non-deduced parameter for value category.
4599         (_CBegin, _CEnd, _CRBegin, _CREnd, _CData): Adjust uses of
4600         __as_const.
4601         (__member_size, __adl_size, __member_empty, __size0_empty):
4602         (__eq_iter_empty, __adl_data): Use lvalue objects in
4603         requirements.
4604         (__sentinel_size): Likewise. Add check for conversion to
4605         unsigned-like.
4606         (__member_data): Allow non-lvalue types to satisfy the concept,
4607         but use lvalue object in requirements.
4608         (_Size, _SSize): Remove forwarding to always use an lvalue.
4609         (_Data): Likewise. Add static assertion for arrays.
4610         * testsuite/std/ranges/access/cdata.cc: Adjust expected
4611         behaviour for rvalues. Add negative tests for ill-formed
4612         expressions.
4613         * testsuite/std/ranges/access/data.cc: Likewise.
4614         * testsuite/std/ranges/access/empty.cc: Adjust expected
4615         behaviour for rvalues.
4616         * testsuite/std/ranges/access/size.cc: Likewise.
4617
4618 2021-06-04  Tim Adye  <Tim.Adye@cern.ch>
4619
4620         * include/std/any (any::_Manager::_S_access): New static
4621         function to access the contained value.
4622         (any::emplace, __any_caster): Use _S_access member of the
4623         manager type.
4624
4625 2021-06-04  Jonathan Wakely  <jwakely@redhat.com>
4626
4627         * doc/xml/manual/status_cxx2020.xml:
4628         * doc/html/*: Regenerate.
4629         * include/bits/hashtable.h (__cpp_lib_generic_unordered_lookup):
4630         Define.
4631         * include/std/version (__cpp_lib_generic_unordered_lookup):
4632         Define.
4633         * testsuite/23_containers/unordered_map/operations/1.cc: Check
4634         feature test macro.
4635         * testsuite/23_containers/unordered_set/operations/1.cc:
4636         Likewise.
4637
4638 2021-06-03  Patrick Palka  <ppalka@redhat.com>
4639
4640         * include/bits/ranges_algo.h (__detail::__can_reread_output):
4641         Factor out this concept from ...
4642         (__unique_copy_fn::operator()): ... here.  Use the concept
4643         throughout.
4644         * testsuite/std/ranges/range.cc: Remove now ill-formed use
4645         of range_value_t on an output_range.
4646         * testsuite/util/testsuite_iterators.h (output_iterator_wrapper):
4647         Define value_type, pointer and reference member types to void.
4648
4649 2021-06-03  Patrick Palka  <ppalka@redhat.com>
4650
4651         PR libstdc++/100577
4652         * include/std/ranges (_RangeAdaptorClosure): Document
4653         _S_has_simple_call_op mechanism.
4654         (_RangeAdaptor): Document _S_has_simple_extra_args mechanism.
4655         (__closure_has_simple_call_op): New concept.
4656         (__adaptor_has_simple_extra_args): Likewise.
4657         (_Partial<_Adaptor, _Args...>): New partial specialization.
4658         (_Partial<_Adaptor, _Arg>): Likewise.
4659         (_Pipe<_Lhs, _Rhs>): Likewise.
4660         (views::_All::_S_has_simple_call_op): Define to true.
4661         (views::_Filter::_S_has_simple_extra_args): Likewise.
4662         (views::_Transform::_S_has_simple_extra_args): Likewise.
4663         (views::_Take::_S_has_simple_extra_args): Likewise.
4664         (views::_TakeWhile::_S_has_simple_extra_args): Likewise.
4665         (views::_Drop::_S_has_simple_extra_args): Likewise.
4666         (views::_DropWhile::_S_has_simple_extra_args): Likewise.
4667         (views::_Join::_S_has_simple_call_op): Likewise.
4668         (views::_Split): Document why we don't define
4669         _S_has_simple_extra_args to true for this adaptor.
4670         (views::_Common::_S_has_simple_call_op): Define to true.
4671         (views::_Reverse::_S_has_simple_call_op): Likewise.
4672         (views::_Elements::_S_has_simple_call_op): Likewise.
4673         * testsuite/std/ranges/adaptors/100577.cc: New test.
4674
4675 2021-06-02  Jonathan Wakely  <jwakely@redhat.com>
4676
4677         PR libstdc++/100863
4678         PR libstdc++/65816
4679         * include/bits/hashtable_policy.h (_Hashtable_ebo_helper):
4680         Value-initialize subobject.
4681         * testsuite/23_containers/unordered_map/allocator/default_init.cc:
4682         Remove XFAIL.
4683         * testsuite/23_containers/unordered_set/allocator/default_init.cc:
4684         Remove XFAIL.
4685
4686 2021-06-02  Jonathan Wakely  <jwakely@redhat.com>
4687
4688         PR libstdc++/96088
4689         * testsuite/23_containers/unordered_map/96088.cc: Adjust
4690         expected number of allocations.
4691         * testsuite/23_containers/unordered_set/96088.cc: Likewise.
4692
4693 2021-06-02  Jonathan Wakely  <jwakely@redhat.com>
4694
4695         * doc/xml/manual/status_cxxis29124.xml: Improve punctuation.
4696         * doc/xml/manual/status_cxxtr1.xml: Likewise.
4697         * doc/xml/manual/status_cxxtr24733.xml: Likewise.
4698         * doc/html/*: Regenerate.
4699
4700 2021-06-01  Patrick Palka  <ppalka@redhat.com>
4701
4702         PR c++/65816
4703         * testsuite/23_containers/deque/allocator/default_init.cc,
4704         testsuite/23_containers/forward_list/allocator/default_init.cc,
4705         testsuite/23_containers/list/allocator/default_init.cc,
4706         testsuite/23_containers/map/allocator/default_init.cc,
4707         testsuite/23_containers/set/allocator/default_init.cc,
4708         testsuite/23_containers/vector/allocator/default_init.cc,
4709         testsuite/23_containers/vector/bool/allocator/default_init.cc:
4710         Remove xfail.
4711
4712 2021-06-01  Jonathan Wakely  <jwakely@redhat.com>
4713
4714         * testsuite/23_containers/unordered_map/96088.cc: Change
4715         effective target to c++17.
4716         * testsuite/23_containers/unordered_set/96088.cc: Likewise.
4717
4718 2021-06-01  Jonathan Wakely  <jwakely@redhat.com>
4719
4720         * testsuite/22_locale/ctype/is/string/89728_neg.cc: Only test
4721         isblank for C++11 and later.
4722
4723 2021-06-01  Jonathan Wakely  <jwakely@redhat.com>
4724
4725         PR libstdc++/100833
4726         * include/bits/ranges_base.h (ranges::advance(iter, n, sentinel)):
4727         Fix return value for no-op case.
4728         * testsuite/24_iterators/range_operations/advance.cc: Test
4729         return values of three-argument overload.
4730
4731 2021-06-01  Jonathan Wakely  <jwakely@redhat.com>
4732
4733         PR libstdc++/99453
4734         * python/Makefile.am: Use archive name for printer hook if no
4735         dynamic library name is available.
4736         * python/Makefile.in: Regenerate.
4737
4738 2021-05-30  Gerald Pfeifer  <gerald@pfeifer.com>
4739
4740         * doc/xml/manual/abi.xml: Remove dead reference to "Intel
4741         Compilers for Linux: Compatibility with GNU Compilers" article.
4742         * doc/html/manual/abi.html: Regenerate.
4743
4744 2021-05-26  François Dumont  <fdumont@gcc.gnu.org>
4745
4746         * include/debug/formatter.h
4747         (_Error_formatter::_Parameter::_Named): New.
4748         (_Error_formatter::_Parameter::_Type): Inherit latter.
4749         (_Error_formatter::_Parameter::_M_integer): Likewise.
4750         (_Error_formatter::_Parameter::_M_string): Likewise.
4751         * src/c++11/debug.cc: Include <cstring>.
4752         (_Print_func_t): New.
4753         (print_raw(PrintContext&, const char*, ptrdiff_t)): New.
4754         (print_word): Use '%.*s' format in fprintf to render only expected number of chars.
4755         (pretty_print(PrintContext&, const char*, _Print_func_t)): New.
4756         (print_type): Rename in...
4757         (print_type_info): ...this. Use pretty_print.
4758         (print_address, print_integer): New.
4759         (print_named_name, print_iterator_constness, print_iterator_state): New.
4760         (print_iterator_seq_type): New.
4761         (print_named_field, print_type_field, print_instance_field, print_iterator_field): New.
4762         (print_field): Use latters.
4763         (print_quoted_named_name, print_type_type, print_type, print_instance): New.
4764         (print_string(PrintContext&, const char*, const _Parameter*, size_t)):
4765         Change signature to...
4766         (print_string(PrintContext&, const char*, ptrdiff_t, const _Parameter*, size_t)):
4767         ...this and adapt. Remove intermediate buffer to render input string.
4768         (print_string(PrintContext&, const char*, ptrdiff_t)): New.
4769
4770 2021-05-26  Jonathan Wakely  <jwakely@redhat.com>
4771
4772         PR libstdc++/100768
4773         * include/bits/ranges_base.h (advance, distance, next, prev):
4774         Replace function templates with function objects.
4775         * testsuite/24_iterators/headers/iterator/synopsis_c++20.cc:
4776         Adjust for changes to function objects.
4777         * testsuite/std/ranges/adaptors/elements.cc: Add using
4778         declarations for names from namespace ranges.
4779         * testsuite/std/ranges/adaptors/transform.cc: Likewise.
4780         * testsuite/24_iterators/range_operations/100768.cc: New test.
4781
4782 2021-05-24  François Dumont  <fdumont@gcc.gnu.org>
4783
4784         PR libstdc++/96088
4785         * include/bits/hashtable_policy.h (_Select2nd): New.
4786         (_NodeBuilder<>): New.
4787         (_ReuseOrAllocNode<>::operator()): Use variadic template args.
4788         (_AllocNode<>::operator()): Likewise.
4789         * include/bits/hashtable.h
4790         (_Hashtable<>::__node_builder_t): New.
4791         (_Hashtable<>::_M_insert_unique<>(_Kt&&, _Arg&&, const _NodeGenerator&)):
4792          New.
4793         (_Hashtable<>::_S_forward_key): New.
4794         (_Hashtable<>::_M_insert): Use latter.
4795         (_Hashtable<>::_M_insert(const_iterator, _Arg&&, const _NodeGenerator&, false_type)):
4796         Instantiate node first, compute hash code second.
4797         * testsuite/23_containers/unordered_map/96088.cc: New test.
4798         * testsuite/23_containers/unordered_multimap/96088.cc: New test.
4799         * testsuite/23_containers/unordered_multiset/96088.cc: New test.
4800         * testsuite/23_containers/unordered_set/96088.cc: New test.
4801         * testsuite/util/replacement_memory_operators.h
4802         (counter::_M_increment): New.
4803         (counter::_M_decrement): New.
4804         (counter::reset()): New.
4805
4806 2021-05-24  Patrick Palka  <ppalka@redhat.com>
4807
4808         PR libstdc++/100479
4809         * include/std/ranges (__detail::__non_propagating_cache): Move
4810         definition up to before that of _CachedPosition.  Make base
4811         class _Optional_base protected instead of private.  Add const
4812         overload for operator*.
4813         (__detail::_CachedPosition): Rewrite the partial specialization
4814         for forward ranges as a derived class of __non_propagating_cache.
4815         Remove the size constraint on the partial specialization for
4816         random access ranges.  Add copy/move/copy-assignment/move-assignment
4817         members to the offset partial specialization for random
4818         access ranges that propagate the cached value but additionally
4819         invalidate it in the source object on move.
4820         * testsuite/std/ranges/adaptors/100479.cc: New test.
4821
4822 2021-05-24  Jonathan Wakely  <jwakely@redhat.com>
4823
4824         * testsuite/25_algorithms/inplace_merge/constrained.cc: Qualify
4825         call to ranges::next.
4826         * testsuite/25_algorithms/is_sorted/constrained.cc: Likewise.
4827         * testsuite/25_algorithms/is_sorted_until/constrained.cc:
4828         Likewise.
4829         * testsuite/25_algorithms/swap_ranges/1.cc: Qualify call to
4830         swap_ranges.
4831
4832 2021-05-21  Patrick Palka  <ppalka@redhat.com>
4833
4834         PR libstdc++/100606
4835         * include/std/ranges (drop_while_view::begin): Assert the
4836         precondition added by LWG 3490.
4837
4838 2021-05-21  Patrick Palka  <ppalka@redhat.com>
4839
4840         PR libstdc++/100690
4841         * include/std/ranges (iota_view::_Sentinel::_M_distance_from):
4842         Split out this member function from ...
4843         (iota_view::_Sentinel::operator-): ... here, for sake of access
4844         control.
4845         * testsuite/std/ranges/iota/iota_view.cc (test05): New test.
4846
4847 2021-05-20  Jonathan Wakely  <jwakely@redhat.com>
4848
4849         * include/bits/random.tcc (__representable_as_double)
4850         (__p1_representable_as_double): Add "" to static asserts.
4851
4852 2021-05-20  Jonathan Wakely  <jwakely@redhat.com>
4853
4854         PR libstdc++/100676
4855         * include/bits/c++config (__glibcxx_assert_1): Rename to ...
4856         (__glibcxx_constexpr_assert): ... this.
4857         (__glibcxx_assert_impl): Use __glibcxx_constexpr_assert.
4858         (__glibcxx_assert): Define as either __glibcxx_constexpr_assert
4859         or __glibcxx_assert_impl.
4860         (__glibcxx_assert_2): Remove
4861         * include/debug/macros.h (_GLIBCXX_DEBUG_VERIFY_AT_F): Use
4862         __glibcxx_constexpr_assert instead of __glibcxx_assert_1.
4863         * testsuite/21_strings/basic_string_view/element_access/char/back_constexpr_neg.cc:
4864         Adjust expected error.
4865         * testsuite/21_strings/basic_string_view/element_access/char/constexpr_neg.cc:
4866         Likewise.
4867         * testsuite/21_strings/basic_string_view/element_access/char/front_constexpr_neg.cc:
4868         Likewise.
4869         Likewise.
4870         * testsuite/21_strings/basic_string_view/element_access/wchar_t/back_constexpr_neg.cc:
4871         Likewise.
4872         * testsuite/21_strings/basic_string_view/element_access/wchar_t/constexpr_neg.cc:
4873         Likewise.
4874         * testsuite/21_strings/basic_string_view/element_access/wchar_t/front_constexpr_neg.cc:
4875         Likewise.
4876         * testsuite/23_containers/span/back_neg.cc: Likewise.
4877         * testsuite/23_containers/span/front_neg.cc: Likewise.
4878         * testsuite/23_containers/span/index_op_neg.cc: Likewise.
4879
4880 2021-05-20  Patrick Palka  <ppalka@redhat.com>
4881
4882         PR libstdc++/100639
4883         * include/bits/stl_iterator.h (reverse_iterator::difference_type):
4884         In C++20 mode, define in terms of iter_difference_t as per P0896R4.
4885         (reverse_iterator::reference): Likewise, but with iter_reference_t.
4886         (reverse_iterator::value_type): Likewise, but with iter_value_t.
4887         * testsuite/std/ranges/adaptors/reverse.cc (test08): New test.
4888         * testsuite/24_iterators/reverse_iterator/100639.cc: New test.
4889
4890 2021-05-20  Joern Rennecke  <joern.rennecke@riscy-ip.com>
4891
4892         PR libstdc++/100361
4893         * include/std/charconv (to_chars): Hide the overloads for
4894         floating-point types for 16 bit targets.
4895         * src/c++17/floating_to_chars.cc: Don't compile for 16 bit targets.
4896         * testsuite/20_util/to_chars/double.cc: Run this test only on
4897         size32plus targets.
4898         * testsuite/20_util/to_chars/float.cc: Likewise.
4899         * testsuite/20_util/to_chars/long_double.cc: Likewise.
4900
4901 2021-05-18  Patrick Palka  <ppalka@redhat.com>
4902
4903         PR libstdc++/100631
4904         * include/std/ranges (elements_view::_Sentinel::operator-): Use
4905         _M_distance_from in the other operator- overload too.
4906         * testsuite/std/ranges/adaptors/elements.cc (test06): Augment test.
4907
4908 2021-05-18  Thomas Schwinge  <thomas@codesourcery.com>
4909
4910         * testsuite/lib/prune.exp: Add note about 'dg-note'.
4911
4912 2021-05-18  Patrick Palka  <ppalka@redhat.com>
4913
4914         PR libstdc++/100475
4915         * include/std/ranges (__box::__box): Use non-list-initialization
4916         in member initializer list of in-place constructor of the
4917         partial specialization for semiregular types.
4918         (__box::operator->): Use std::__addressof.
4919         * testsuite/std/ranges/adaptors/detail/semiregular_box.cc
4920         (test02): New test.
4921         * testsuite/std/ranges/single_view.cc (test04): New test.
4922
4923 2021-05-18  Patrick Palka  <ppalka@redhat.com>
4924
4925         PR libstdc++/100621
4926         * include/std/ranges (reverse_view::_S_needs_cached_begin):
4927         Set to true if the underlying non-common random-access range
4928         doesn't have a sized sentinel.
4929
4930 2021-05-18  Patrick Palka  <ppalka@redhat.com>
4931
4932         PR libstdc++/100631
4933         * include/std/ranges (elements_view::_Iterator): Also befriend
4934         _Sentinel<!_Const>.
4935         (elements_view::_Sentinel::_M_equal): Templatize.
4936         (elements_view::_Sentinel::_M_distance_from): Split out from ...
4937         (elements_view::_Sentinel::operator-): ... here.  Depend on
4938         _Base2 instead of _Base in the return type.
4939         * testsuite/std/ranges/adaptors/elements.cc (test06, test07):
4940         New tests.
4941
4942 2021-05-17  Thomas Rodgers  <rodgert@twrodgers.com>
4943
4944         * include/bits/atomic_wait.h (__waiter::_M_do_wait_v): loop
4945         until value change observed.
4946         (__waiter_base::_M_laundered): New member.
4947         (__waiter_base::_M_notify): Check _M_laundered to determine
4948         whether to wake one or all.
4949         (__detail::__atomic_compare): Return true if call to
4950         __builtin_memcmp() == 0.
4951         (__waiter_base::_S_do_spin_v): Adjust predicate.
4952         * testsuite/29_atomics/atomic/wait_notify/100334.cc: New
4953         test.
4954
4955 2021-05-17  Jonathan Wakely  <jwakely@redhat.com>
4956
4957         PR libstdc++/100630
4958         * include/experimental/bits/fs_path.h (__is_constructible_from):
4959         Test construction from a const lvalue, not an rvalue.
4960         * testsuite/27_io/filesystem/path/construct/100630.cc: New test.
4961         * testsuite/experimental/filesystem/path/construct/100630.cc:
4962         New test.
4963
4964 2021-05-17  Antony Polukhin  <antoshkka@gmail.com>
4965
4966         PR libstdc++/89728
4967         * include/bits/locale_facets.h (ctype<basic_string<C,T,A>>):
4968         Declare (but do not define) partial specialization.
4969         * testsuite/22_locale/ctype/is/string/89728_neg.cc: New test.
4970
4971 2021-05-17  Jonathan Wakely  <jwakely@redhat.com>
4972
4973         * include/std/thread (jthread::_S_create): Fix static assert
4974         message.
4975         * testsuite/30_threads/jthread/95989.cc: Re-enable test.
4976         * testsuite/30_threads/jthread/jthread.cc: Do not require
4977         pthread effective target.
4978         * testsuite/30_threads/jthread/2.cc: Moved to...
4979         * testsuite/30_threads/jthread/version.cc: ...here.
4980
4981 2021-05-17  Jonathan Wakely  <jwakely@redhat.com>
4982
4983         * doc/Makefile.am: Simplify doxygen recipes and use --latex_cmd.
4984         * doc/Makefile.in: Regenerate.
4985         * doc/doxygen/user.cfg.in (LATEX_CMD_NAME): Add placeholder
4986         value.
4987         * scripts/run_doxygen (print_usage): Always print to stdout and
4988         do not exit.
4989         (fail): New function for exiting on error.
4990         (parse_options): Handle --latex_cmd. Do not treat --help the
4991         same as errors. Simplify handling of required arguments.
4992
4993 2021-05-12  Jonathan Wakely  <jwakely@redhat.com>
4994
4995         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_end.cc:
4996         Increase dg-timeout-factor to 4. Fix -Wunused-parameter
4997         warnings. Replace bitwise AND with logical AND in loop
4998         condition.
4999         * testsuite/25_algorithms/pstl/alg_nonmodifying/search_n.cc:
5000         Replace bitwise AND with logical AND in loop condition.
5001         * testsuite/util/pstl/test_utils.h: Remove unused parameter
5002         names.
5003
5004 2021-05-11  Patrick Palka  <ppalka@redhat.com>
5005
5006         * src/c++17/ryu/LOCAL_PATCHES: Update.
5007         * src/c++17/ryu/ryu_generic_128.h: Remove extern "C".
5008         Remove declarations for never-defined functions.
5009         * testsuite/20_util/to_chars/4.cc: New test.
5010
5011 2021-05-11  Jonathan Wakely  <jwakely@redhat.com>
5012
5013         * testsuite/20_util/headers/memory/synopsis.cc: Define C++98
5014         alternative for macro.
5015         * testsuite/20_util/shared_ptr/creation/99006.cc: Add effective
5016         target keyword.
5017         * testsuite/25_algorithms/copy/debug/99402.cc: Avoid C++11
5018         syntax.
5019
5020 2021-05-11  Jonathan Wakely  <jwakely@redhat.com>
5021
5022         * include/bits/allocator.h (allocator<void>) [C++20]: Add
5023         missing noexcept to constructor. Restore missing POCMA and
5024         is_always_equal_traits.
5025         [C++17]: Make construct and destroy members private and
5026         declare allocator_traits as a friend.
5027         * include/bits/memoryfwd.h (allocator_traits): Declare.
5028         * include/ext/malloc_allocator.h (malloc_allocator::allocate):
5029         Add nodiscard attribute. Add static assertion for LWG 3307.
5030         * include/ext/new_allocator.h (new_allocator::allocate): Add
5031         static assertion for LWG 3307.
5032         * testsuite/20_util/allocator/void.cc: Check that converting
5033         constructor is noexcept. Check for propagation traits and
5034         size_type and difference_type. Check that pointer and
5035         const_pointer are gone in C++20.
5036
5037 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
5038
5039         * include/std/stop_token: Remove TODO comment.
5040
5041 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
5042
5043         * include/bits/shared_ptr_base.h (__shared_count(unique_ptr&&)):
5044         Initialize a non-reference deleter from an rvalue, as per LWG
5045         3548.
5046         (__shared_ptr::_UniqCompatible): Add missing constraint.
5047         * testsuite/20_util/shared_ptr/cons/lwg3548.cc: New test.
5048         * testsuite/20_util/shared_ptr/cons/unique_ptr_deleter.cc: Check
5049         constraints.
5050
5051 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
5052
5053         * testsuite/17_intro/headers/c++2017/all_attributes.cc: Remove
5054         -std=gnu++17 from dg-options directive.
5055         * testsuite/17_intro/headers/c++2017/all_no_exceptions.cc:
5056         Likewise.
5057         * testsuite/17_intro/headers/c++2017/all_pedantic_errors.cc:
5058         Likewise.
5059         * testsuite/17_intro/headers/c++2017/operator_names.cc:
5060         Likewise.
5061         * testsuite/17_intro/headers/c++2017/parallel_mode.cc: Likewise.
5062         * testsuite/17_intro/headers/c++2017/stdc++.cc: Likewise.
5063         * testsuite/17_intro/headers/c++2017/stdc++_multiple_inclusion.cc:
5064         Likewise.
5065         * testsuite/18_support/aligned_alloc/aligned_alloc.cc: Likewise.
5066         * testsuite/18_support/byte/81076.cc: Likewise.
5067         * testsuite/18_support/byte/global_neg.cc: Likewise.
5068         * testsuite/18_support/byte/ops.cc: Likewise.
5069         * testsuite/18_support/byte/requirements.cc: Likewise.
5070         * testsuite/18_support/headers/cfloat/values_c++17.cc: Likewise.
5071         * testsuite/18_support/launder/1.cc: Likewise.
5072         * testsuite/18_support/launder/nodiscard.cc: Likewise.
5073         * testsuite/18_support/launder/requirements.cc: Likewise.
5074         * testsuite/18_support/launder/requirements_neg.cc: Likewise.
5075         * testsuite/18_support/new_aligned.cc: Likewise.
5076         * testsuite/18_support/uncaught_exceptions/uncaught_exceptions.cc:
5077         Likewise.
5078         * testsuite/19_diagnostics/error_code/is_error_code_v.cc:
5079         Likewise.
5080         * testsuite/19_diagnostics/error_condition/hash.cc: Likewise.
5081         * testsuite/20_util/addressof/requirements/constexpr.cc:
5082         Likewise.
5083         * testsuite/20_util/as_const/1.cc: Likewise.
5084         * testsuite/20_util/as_const/rvalue_neg.cc: Likewise.
5085         * testsuite/20_util/bind/83427.cc: Likewise.
5086         * testsuite/20_util/bind/is_placeholder_v.cc: Likewise.
5087         * testsuite/20_util/bool_constant/requirements.cc: Likewise.
5088         * testsuite/20_util/duration/arithmetic/constexpr_c++17.cc:
5089         Likewise.
5090         * testsuite/20_util/duration/requirements/treat_as_floating_point_v.cc:
5091         Likewise.
5092         * testsuite/20_util/duration_cast/rounding.cc: Likewise.
5093         * testsuite/20_util/enable_shared_from_this/members/weak_from_this.cc:
5094         Likewise.
5095         * testsuite/20_util/from_chars/1_neg.cc: Likewise.
5096         * testsuite/20_util/from_chars/requirements.cc: Likewise.
5097         * testsuite/20_util/function/91456.cc: Likewise.
5098         * testsuite/20_util/function/cons/deduction.cc: Likewise.
5099         * testsuite/20_util/function_objects/83607.cc: Likewise.
5100         * testsuite/20_util/function_objects/invoke/59768.cc: Likewise.
5101         * testsuite/20_util/function_objects/mem_fn/80478.cc: Likewise.
5102         * testsuite/20_util/function_objects/not_fn/1.cc: Likewise.
5103         * testsuite/20_util/function_objects/not_fn/87538.cc: Likewise.
5104         * testsuite/20_util/has_unique_object_representations/requirements/explicit_instantiation.cc:
5105         Likewise.
5106         * testsuite/20_util/has_unique_object_representations/requirements/typedefs.cc:
5107         Likewise.
5108         * testsuite/20_util/has_unique_object_representations/value.cc:
5109         Likewise.
5110         * testsuite/20_util/hash/nullptr.cc: Likewise.
5111         * testsuite/20_util/in_place/requirements.cc: Likewise.
5112         * testsuite/20_util/is_aggregate/incomplete_neg.cc: Likewise.
5113         * testsuite/20_util/is_aggregate/requirements/explicit_instantiation.cc:
5114         Likewise.
5115         * testsuite/20_util/is_aggregate/requirements/typedefs.cc:
5116         Likewise.
5117         * testsuite/20_util/is_aggregate/value.cc: Likewise.
5118         * testsuite/20_util/is_invocable/83395.cc: Likewise.
5119         * testsuite/20_util/is_invocable/91456.cc: Likewise.
5120         * testsuite/20_util/is_invocable/requirements/explicit_instantiation.cc:
5121         Likewise.
5122         * testsuite/20_util/is_invocable/requirements/typedefs.cc:
5123         Likewise.
5124         * testsuite/20_util/is_invocable/value.cc: Likewise.
5125         * testsuite/20_util/is_literal_type/deprecated-1z.cc: Likewise.
5126         * testsuite/20_util/is_nothrow_constructible/94003.cc: Likewise.
5127         * testsuite/20_util/is_nothrow_invocable/83395.cc: Likewise.
5128         * testsuite/20_util/is_nothrow_invocable/requirements/explicit_instantiation.cc:
5129         Likewise.
5130         * testsuite/20_util/is_nothrow_invocable/requirements/typedefs.cc: Likewise.
5131         * testsuite/20_util/is_nothrow_invocable/value.cc: Likewise.
5132         * testsuite/20_util/is_nothrow_swappable/requirements/explicit_instantiation.cc:
5133         Likewise.
5134         * testsuite/20_util/is_nothrow_swappable/requirements/typedefs.cc:
5135         Likewise.
5136         * testsuite/20_util/is_nothrow_swappable/value.cc: Likewise.
5137         * testsuite/20_util/is_nothrow_swappable_with/requirements/explicit_instantiation.cc:
5138         Likewise.
5139         * testsuite/20_util/is_nothrow_swappable_with/requirements/typedefs.cc:
5140         Likewise.
5141         * testsuite/20_util/is_nothrow_swappable_with/value.cc:
5142         Likewise.
5143         * testsuite/20_util/is_swappable/requirements/explicit_instantiation.cc:
5144         Likewise.
5145         * testsuite/20_util/is_swappable/requirements/typedefs.cc:
5146         Likewise.
5147         * testsuite/20_util/is_swappable/value.cc: Likewise.
5148         * testsuite/20_util/is_swappable_with/requirements/explicit_instantiation.cc:
5149         Likewise.
5150         * testsuite/20_util/is_swappable_with/requirements/typedefs.cc:
5151         Likewise.
5152         * testsuite/20_util/is_swappable_with/value.cc: Likewise.
5153         * testsuite/20_util/logical_traits/83134.cc: Likewise.
5154         * testsuite/20_util/logical_traits/requirements/explicit_instantiation.cc:
5155         Likewise.
5156         * testsuite/20_util/logical_traits/requirements/typedefs.cc:
5157         Likewise.
5158         * testsuite/20_util/logical_traits/value.cc: Likewise.
5159         * testsuite/20_util/pair/cons/deduction.cc: Likewise.
5160         * testsuite/20_util/pair/swap_cxx17.cc: Likewise.
5161         * testsuite/20_util/ratio/requirements/ratio_equal_v.cc:
5162         Likewise.
5163         * testsuite/20_util/reference_wrapper/83427.cc: Likewise.
5164         * testsuite/20_util/reference_wrapper/deduction.cc: Likewise.
5165         * testsuite/20_util/shared_ptr/casts/reinterpret.cc: Likewise.
5166         * testsuite/20_util/shared_ptr/cons/deduction.cc: Likewise.
5167         * testsuite/20_util/shared_ptr/requirements/weak_type.cc:
5168         Likewise.
5169         * testsuite/20_util/time_point/arithmetic/constexpr.cc:
5170         Likewise.
5171         * testsuite/20_util/time_point_cast/rounding.cc: Likewise.
5172         * testsuite/20_util/to_chars/3.cc: Likewise.
5173         * testsuite/20_util/to_chars/chars_format.cc: Likewise.
5174         * testsuite/20_util/to_chars/lwg3266.cc: Likewise.
5175         * testsuite/20_util/to_chars/requirements.cc: Likewise.
5176         * testsuite/20_util/tuple/78939.cc: Likewise.
5177         * testsuite/20_util/tuple/apply/1.cc: Likewise.
5178         * testsuite/20_util/tuple/apply/2.cc: Likewise.
5179         * testsuite/20_util/tuple/cons/deduction.cc: Likewise.
5180         * testsuite/20_util/tuple/make_from_tuple/1.cc: Likewise.
5181         * testsuite/20_util/tuple/make_from_tuple/2.cc: Likewise.
5182         * testsuite/20_util/tuple/swap_cxx17.cc: Likewise.
5183         * testsuite/20_util/tuple/tuple_size_v.cc: Likewise.
5184         * testsuite/20_util/unique_ptr/cons/deduction_neg.cc: Likewise.
5185         * testsuite/20_util/uses_allocator/requirements/uses_allocator_v.cc:
5186         Likewise.
5187         * testsuite/20_util/variable_templates_for_traits.cc: Likewise.
5188         * testsuite/20_util/void_t/1.cc: Likewise.
5189         * testsuite/20_util/weak_ptr/cons/deduction.cc: Likewise.
5190         * testsuite/24_iterators/container_access.cc: Likewise.
5191         * testsuite/24_iterators/headers/iterator/range_access_c++17.cc:
5192         Likewise.
5193         * testsuite/24_iterators/headers/iterator/synopsis_c++17.cc:
5194         Likewise.
5195         * testsuite/24_iterators/range_access/range_access_cpp17.cc:
5196         Likewise.
5197         * testsuite/24_iterators/range_access/range_access_cpp17_neg.cc:
5198         Likewise.
5199         * testsuite/26_numerics/gcd/gcd_neg.cc: Likewise.
5200         * testsuite/26_numerics/headers/cmath/functions_std_c++17.cc:
5201         Likewise.
5202         * testsuite/26_numerics/headers/cmath/hypot.cc: Likewise.
5203         * testsuite/26_numerics/headers/cmath/special_functions_global.cc:
5204         Likewise.
5205         * testsuite/26_numerics/lcm/1.cc: Likewise.
5206         * testsuite/26_numerics/lcm/lcm_neg.cc: Likewise.
5207         * testsuite/26_numerics/valarray/deduction.cc: Likewise.
5208         * testsuite/27_io/basic_ostream/inserters_other/char/lwg2221.cc:
5209         Likewise.
5210         * testsuite/27_io/manipulators/standard/char/quoted_sv.cc:
5211         Likewise.
5212         * testsuite/27_io/manipulators/standard/wchar_t/quoted_sv.cc:
5213         Likewise.
5214         * testsuite/27_io/types/4.cc: Likewise.
5215         * testsuite/28_regex/basic_regex/ctors/deduction.cc: Likewise.
5216         * testsuite/libstdc++-prettyprinters/91997.cc: Likewise.
5217         * testsuite/libstdc++-prettyprinters/cxx17.cc: Likewise.
5218
5219 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
5220
5221         * testsuite/20_util/function_objects/searchers.cc: Remove
5222         -std=gnu++17 from dg-options directive.
5223         * testsuite/20_util/specialized_algorithms/memory_management_tools/1.cc:
5224         Likewise.
5225         * testsuite/20_util/specialized_algorithms/memory_management_tools/destroy_neg.cc:
5226         Likewise.
5227         * testsuite/20_util/specialized_algorithms/uninitialized_value_construct/94540.cc:
5228         Likewise.
5229         * testsuite/20_util/specialized_algorithms/uninitialized_value_construct/94831.cc:
5230         Likewise.
5231         * testsuite/20_util/specialized_algorithms/uninitialized_value_construct_n/94540.cc:
5232         Likewise.
5233         * testsuite/20_util/specialized_algorithms/uninitialized_value_construct_n/sizes.cc:
5234         Likewise.
5235         * testsuite/20_util/unique_ptr/specialized_algorithms/swap_cxx17.cc:
5236         Likewise.
5237         * testsuite/25_algorithms/clamp/1.cc: Likewise.
5238         * testsuite/25_algorithms/clamp/2.cc: Likewise.
5239         * testsuite/25_algorithms/clamp/constexpr.cc: Likewise.
5240         * testsuite/25_algorithms/clamp/requirements/explicit_instantiation/1.cc:
5241         Likewise.
5242         * testsuite/25_algorithms/clamp/requirements/explicit_instantiation/pod.cc:
5243         Likewise.
5244         * testsuite/25_algorithms/for_each/for_each_n.cc: Likewise.
5245         * testsuite/25_algorithms/for_each/for_each_n_debug.cc:
5246         Likewise.
5247         * testsuite/25_algorithms/sample/1.cc: Likewise.
5248         * testsuite/25_algorithms/sample/2.cc: Likewise.
5249         * testsuite/25_algorithms/sample/3.cc: Likewise.
5250         * testsuite/25_algorithms/sample/81221.cc: Likewise.
5251         * testsuite/25_algorithms/search/searcher.cc: Likewise.
5252         * testsuite/26_numerics/exclusive_scan/1.cc: Likewise.
5253         * testsuite/26_numerics/inclusive_scan/1.cc: Likewise.
5254         * testsuite/26_numerics/reduce/1.cc: Likewise.
5255         * testsuite/26_numerics/reduce/2.cc: Likewise.
5256         * testsuite/26_numerics/transform_exclusive_scan/1.cc: Likewise.
5257         * testsuite/26_numerics/transform_inclusive_scan/1.cc: Likewise.
5258         * testsuite/26_numerics/transform_reduce/1.cc: Likewise.
5259
5260 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
5261
5262         * testsuite/23_containers/array/cons/deduction.cc: Remove
5263         -std=gnu++17 from dg-options directive.
5264         * testsuite/23_containers/array/cons/deduction_neg.cc: Likewise.
5265         * testsuite/23_containers/array/element_access/constexpr_c++17.cc:
5266         Likewise.
5267         * testsuite/23_containers/array/requirements/constexpr_iter.cc:
5268         Likewise.
5269         * testsuite/23_containers/array/specialized_algorithms/swap_cxx17.cc:
5270         Likewise.
5271         * testsuite/23_containers/deque/cons/deduction.cc: Likewise.
5272         * testsuite/23_containers/deque/modifiers/emplace/cxx17_return.cc:
5273         Likewise.
5274         * testsuite/23_containers/forward_list/cons/deduction.cc:
5275         Likewise.
5276         * testsuite/23_containers/forward_list/modifiers/emplace_cxx17_return.cc:
5277         Likewise.
5278         * testsuite/23_containers/list/cons/deduction.cc: Likewise.
5279         * testsuite/23_containers/list/modifiers/emplace/cxx17_return.cc:
5280         Likewise.
5281         * testsuite/23_containers/map/cons/deduction.cc: Likewise.
5282         * testsuite/23_containers/map/modifiers/extract.cc: Likewise.
5283         * testsuite/23_containers/map/modifiers/insert/83226.cc:
5284         Likewise.
5285         * testsuite/23_containers/map/modifiers/insert_or_assign/1.cc:
5286         Likewise.
5287         * testsuite/23_containers/map/modifiers/merge.cc: Likewise.
5288         * testsuite/23_containers/map/modifiers/try_emplace/1.cc:
5289         Likewise.
5290         * testsuite/23_containers/multimap/cons/deduction.cc: Likewise.
5291         * testsuite/23_containers/multimap/modifiers/extract.cc:
5292         Likewise.
5293         * testsuite/23_containers/multimap/modifiers/merge.cc: Likewise.
5294         * testsuite/23_containers/multiset/cons/deduction.cc: Likewise.
5295         * testsuite/23_containers/multiset/modifiers/extract.cc:
5296         Likewise.
5297         * testsuite/23_containers/multiset/modifiers/merge.cc: Likewise.
5298         * testsuite/23_containers/priority_queue/deduction.cc: Likewise.
5299         * testsuite/23_containers/queue/deduction.cc: Likewise.
5300         * testsuite/23_containers/queue/members/emplace_cxx17_return.cc:
5301         Likewise.
5302         * testsuite/23_containers/set/cons/deduction.cc: Likewise.
5303         * testsuite/23_containers/set/modifiers/extract.cc: Likewise.
5304         * testsuite/23_containers/set/modifiers/merge.cc: Likewise.
5305         * testsuite/23_containers/set/modifiers/node_swap.cc: Likewise.
5306         * testsuite/23_containers/stack/deduction.cc: Likewise.
5307         * testsuite/23_containers/stack/members/emplace_cxx17_return.cc:
5308         Likewise.
5309         * testsuite/23_containers/unordered_map/cons/deduction.cc:
5310         Likewise.
5311         * testsuite/23_containers/unordered_map/modifiers/extract.cc:
5312         Likewise.
5313         * testsuite/23_containers/unordered_map/modifiers/insert_or_assign.cc:
5314         Likewise.
5315         * testsuite/23_containers/unordered_map/modifiers/merge.cc:
5316         Likewise.
5317         * testsuite/23_containers/unordered_map/modifiers/try_emplace.cc:
5318         Likewise.
5319         * testsuite/23_containers/unordered_multimap/cons/deduction.cc:
5320         Likewise.
5321         * testsuite/23_containers/unordered_multimap/modifiers/extract.cc:
5322         Likewise.
5323         * testsuite/23_containers/unordered_multimap/modifiers/merge.cc:
5324         Likewise.
5325         * testsuite/23_containers/unordered_multiset/cons/deduction.cc:
5326         Likewise.
5327         * testsuite/23_containers/unordered_multiset/modifiers/extract.cc:
5328         Likewise.
5329         * testsuite/23_containers/unordered_multiset/modifiers/merge.cc:
5330         Likewise.
5331         * testsuite/23_containers/unordered_set/cons/deduction.cc:
5332         Likewise.
5333         * testsuite/23_containers/unordered_set/modifiers/extract.cc:
5334         Likewise.
5335         * testsuite/23_containers/unordered_set/modifiers/merge.cc:
5336         Likewise.
5337         * testsuite/23_containers/vector/bool/emplace_cxx17_return.cc:
5338         Likewise.
5339         * testsuite/23_containers/vector/cons/89164_c++17.cc: Likewise.
5340         * testsuite/23_containers/vector/cons/deduction.cc: Likewise.
5341         * testsuite/23_containers/vector/modifiers/emplace/cxx17_return.cc:
5342         Likewise.
5343
5344 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
5345
5346         * testsuite/21_strings/basic_string/79162.cc: Remove
5347         -std=gnu++17 from dg-options directive.
5348         * testsuite/21_strings/basic_string/cons/char/7.cc: Likewise.
5349         * testsuite/21_strings/basic_string/cons/char/79162.cc:
5350         Likewise.
5351         * testsuite/21_strings/basic_string/cons/char/86138.cc:
5352         Likewise.
5353         * testsuite/21_strings/basic_string/cons/char/9.cc: Likewise.
5354         * testsuite/21_strings/basic_string/cons/char/deduction.cc:
5355         Likewise.
5356         * testsuite/21_strings/basic_string/cons/char/moveable2_c++17.cc:
5357         Likewise.
5358         * testsuite/21_strings/basic_string/cons/wchar_t/7.cc: Likewise.
5359         * testsuite/21_strings/basic_string/cons/wchar_t/79162.cc:
5360         Likewise.
5361         * testsuite/21_strings/basic_string/cons/wchar_t/86138.cc:
5362         Likewise.
5363         * testsuite/21_strings/basic_string/cons/wchar_t/9.cc: Likewise.
5364         * testsuite/21_strings/basic_string/cons/wchar_t/deduction.cc:
5365         Likewise.
5366         * testsuite/21_strings/basic_string/cons/wchar_t/moveable2_c++17.cc:
5367         Likewise.
5368         * testsuite/21_strings/basic_string/hash/hash.cc: Likewise.
5369         * testsuite/21_strings/basic_string/lwg2758.cc: Likewise.
5370         * testsuite/21_strings/basic_string/lwg2946.cc: Likewise.
5371         * testsuite/21_strings/basic_string/modifiers/append/char/4.cc:
5372         Likewise.
5373         * testsuite/21_strings/basic_string/modifiers/append/wchar_t/4.cc:
5374         Likewise.
5375         * testsuite/21_strings/basic_string/modifiers/assign/char/4.cc:
5376         Likewise.
5377         * testsuite/21_strings/basic_string/modifiers/assign/wchar_t/4.cc:
5378         Likewise.
5379         * testsuite/21_strings/basic_string/modifiers/insert/char/3.cc:
5380         Likewise.
5381         * testsuite/21_strings/basic_string/modifiers/insert/wchar_t/3.cc:
5382         Likewise.
5383         * testsuite/21_strings/basic_string/modifiers/replace/char/7.cc:
5384         Likewise.
5385         * testsuite/21_strings/basic_string/modifiers/replace/wchar_t/7.cc:
5386         Likewise.
5387         * testsuite/21_strings/basic_string/operations/compare/char/2.cc:
5388         Likewise.
5389         * testsuite/21_strings/basic_string/operations/compare/wchar_t/2.cc:
5390         Likewise.
5391         * testsuite/21_strings/basic_string/operations/data/char/2.cc:
5392         Likewise.
5393         * testsuite/21_strings/basic_string/operations/data/char/86169.cc:
5394         Likewise.
5395         * testsuite/21_strings/basic_string/operations/data/wchar_t/2.cc:
5396         Likewise.
5397         * testsuite/21_strings/basic_string/operations/find/char/5.cc:
5398         Likewise.
5399         * testsuite/21_strings/basic_string/operations/find/wchar_t/5.cc:
5400         Likewise.
5401         * testsuite/21_strings/basic_string/operators/char/5.cc:
5402         Likewise.
5403         * testsuite/21_strings/basic_string/operators/wchar_t/5.cc:
5404         Likewise.
5405         * testsuite/21_strings/basic_string_view/capacity/1.cc:
5406         Likewise.
5407         * testsuite/21_strings/basic_string_view/capacity/empty_neg.cc:
5408         Likewise.
5409         * testsuite/21_strings/basic_string_view/cons/char/1.cc:
5410         Likewise.
5411         * testsuite/21_strings/basic_string_view/cons/char/2.cc:
5412         Likewise.
5413         * testsuite/21_strings/basic_string_view/cons/char/3.cc:
5414         Likewise.
5415         * testsuite/21_strings/basic_string_view/cons/char/nonnull.cc:
5416         Likewise.
5417         * testsuite/21_strings/basic_string_view/cons/wchar_t/1.cc:
5418         Likewise.
5419         * testsuite/21_strings/basic_string_view/cons/wchar_t/2.cc:
5420         Likewise.
5421         * testsuite/21_strings/basic_string_view/cons/wchar_t/3.cc:
5422         Likewise.
5423         * testsuite/21_strings/basic_string_view/cons/wchar_t/nonnull.cc:
5424         Likewise.
5425         * testsuite/21_strings/basic_string_view/element_access/char/1.cc:
5426         Likewise.
5427         * testsuite/21_strings/basic_string_view/element_access/char/2.cc:
5428         Likewise.
5429         * testsuite/21_strings/basic_string_view/element_access/char/back_constexpr_neg.cc:
5430         Likewise.
5431         * testsuite/21_strings/basic_string_view/element_access/char/constexpr.cc:
5432         Likewise.
5433         * testsuite/21_strings/basic_string_view/element_access/char/constexpr_neg.cc:
5434         Likewise.
5435         * testsuite/21_strings/basic_string_view/element_access/char/empty.cc:
5436         Likewise.
5437         * testsuite/21_strings/basic_string_view/element_access/char/front_back.cc:
5438         Likewise.
5439         * testsuite/21_strings/basic_string_view/element_access/char/front_back_constexpr.cc:
5440         Likewise.
5441         * testsuite/21_strings/basic_string_view/element_access/char/front_constexpr_neg.cc:
5442         Likewise.
5443         * testsuite/21_strings/basic_string_view/element_access/wchar_t/1.cc:
5444         Likewise.
5445         * testsuite/21_strings/basic_string_view/element_access/wchar_t/2.cc:
5446         Likewise.
5447         * testsuite/21_strings/basic_string_view/element_access/wchar_t/back_constexpr_neg.cc:
5448         Likewise.
5449         * testsuite/21_strings/basic_string_view/element_access/wchar_t/constexpr.cc:
5450         Likewise.
5451         * testsuite/21_strings/basic_string_view/element_access/wchar_t/constexpr_neg.cc:
5452         Likewise.
5453         * testsuite/21_strings/basic_string_view/element_access/wchar_t/empty.cc:
5454         Likewise.
5455         * testsuite/21_strings/basic_string_view/element_access/wchar_t/front_back.cc:
5456         Likewise.
5457         * testsuite/21_strings/basic_string_view/element_access/wchar_t/front_constexpr_neg.cc:
5458         Likewise.
5459         * testsuite/21_strings/basic_string_view/include.cc: Likewise.
5460         * testsuite/21_strings/basic_string_view/inserters/94051.cc:
5461         Likewise.
5462         * testsuite/21_strings/basic_string_view/inserters/char/1.cc:
5463         Likewise.
5464         * testsuite/21_strings/basic_string_view/inserters/char/2.cc:
5465         Likewise.
5466         * testsuite/21_strings/basic_string_view/inserters/char/3.cc:
5467         Likewise.
5468         * testsuite/21_strings/basic_string_view/inserters/pod/10081-out.cc:
5469         Likewise.
5470         * testsuite/21_strings/basic_string_view/inserters/wchar_t/1.cc:
5471         Likewise.
5472         * testsuite/21_strings/basic_string_view/inserters/wchar_t/2.cc:
5473         Likewise.
5474         * testsuite/21_strings/basic_string_view/inserters/wchar_t/3.cc:
5475         Likewise.
5476         * testsuite/21_strings/basic_string_view/literals/types-char8_t.cc:
5477         Likewise.
5478         * testsuite/21_strings/basic_string_view/literals/types.cc:
5479         Likewise.
5480         * testsuite/21_strings/basic_string_view/literals/values-char8_t.cc:
5481         Likewise.
5482         * testsuite/21_strings/basic_string_view/literals/values.cc:
5483         Likewise.
5484         * testsuite/21_strings/basic_string_view/modifiers/remove_prefix/char/1.cc:
5485         Likewise.
5486         * testsuite/21_strings/basic_string_view/modifiers/remove_prefix/wchar_t/1.cc:
5487         Likewise.
5488         * testsuite/21_strings/basic_string_view/modifiers/remove_suffix/char/1.cc:
5489         Likewise.
5490         * testsuite/21_strings/basic_string_view/modifiers/remove_suffix/wchar_t/1.cc:
5491         Likewise.
5492         * testsuite/21_strings/basic_string_view/modifiers/swap/char/1.cc:
5493         Likewise.
5494         * testsuite/21_strings/basic_string_view/modifiers/swap/wchar_t/1.cc:
5495         Likewise.
5496         * testsuite/21_strings/basic_string_view/operations/compare/char/1.cc:
5497         Likewise.
5498         * testsuite/21_strings/basic_string_view/operations/compare/char/13650.cc:
5499         Likewise.
5500         * testsuite/21_strings/basic_string_view/operations/compare/char/2.cc:
5501         Likewise.
5502         * testsuite/21_strings/basic_string_view/operations/compare/char/70483.cc:
5503         Likewise.
5504         * testsuite/21_strings/basic_string_view/operations/compare/char/nonnull.cc:
5505         Likewise.
5506         * testsuite/21_strings/basic_string_view/operations/compare/wchar_t/1.cc:
5507         Likewise.
5508         * testsuite/21_strings/basic_string_view/operations/compare/wchar_t/13650.cc:
5509         Likewise.
5510         * testsuite/21_strings/basic_string_view/operations/compare/wchar_t/2.cc:
5511         Likewise.
5512         * testsuite/21_strings/basic_string_view/operations/copy/char/1.cc:
5513         Likewise.
5514         * testsuite/21_strings/basic_string_view/operations/copy/char/2.cc:
5515         Likewise.
5516         * testsuite/21_strings/basic_string_view/operations/copy/wchar_t/1.cc:
5517         Likewise.
5518         * testsuite/21_strings/basic_string_view/operations/copy/wchar_t/2.cc:
5519         Likewise.
5520         * testsuite/21_strings/basic_string_view/operations/data/char/1.cc:
5521         Likewise.
5522         * testsuite/21_strings/basic_string_view/operations/data/wchar_t/1.cc:
5523         Likewise.
5524         * testsuite/21_strings/basic_string_view/operations/find/char/1.cc:
5525         Likewise.
5526         * testsuite/21_strings/basic_string_view/operations/find/char/2.cc:
5527         Likewise.
5528         * testsuite/21_strings/basic_string_view/operations/find/char/3.cc:
5529         Likewise.
5530         * testsuite/21_strings/basic_string_view/operations/find/char/4.cc:
5531         Likewise.
5532         * testsuite/21_strings/basic_string_view/operations/find/char/nonnull.cc:
5533         Likewise.
5534         * testsuite/21_strings/basic_string_view/operations/find/wchar_t/1.cc:
5535         Likewise.
5536         * testsuite/21_strings/basic_string_view/operations/find/wchar_t/2.cc:
5537         Likewise.
5538         * testsuite/21_strings/basic_string_view/operations/find/wchar_t/3.cc:
5539         Likewise.
5540         * testsuite/21_strings/basic_string_view/operations/find/wchar_t/4.cc:
5541         Likewise.
5542         * testsuite/21_strings/basic_string_view/operations/rfind/char/1.cc:
5543         Likewise.
5544         * testsuite/21_strings/basic_string_view/operations/rfind/char/2.cc:
5545         Likewise.
5546         * testsuite/21_strings/basic_string_view/operations/rfind/char/3.cc:
5547         Likewise.
5548         * testsuite/21_strings/basic_string_view/operations/rfind/char/nonnull.cc:
5549         Likewise.
5550         * testsuite/21_strings/basic_string_view/operations/rfind/wchar_t/1.cc:
5551         Likewise.
5552         * testsuite/21_strings/basic_string_view/operations/rfind/wchar_t/2.cc:
5553         Likewise.
5554         * testsuite/21_strings/basic_string_view/operations/rfind/wchar_t/3.cc:
5555         Likewise.
5556         * testsuite/21_strings/basic_string_view/operations/string_conversion/1.cc:
5557         Likewise.
5558         * testsuite/21_strings/basic_string_view/operations/substr/char/1.cc:
5559         Likewise.
5560         * testsuite/21_strings/basic_string_view/operations/substr/char/83511.cc:
5561         Likewise.
5562         * testsuite/21_strings/basic_string_view/operations/substr/wchar_t/1.cc:
5563         Likewise.
5564         * testsuite/21_strings/basic_string_view/operations/substr/wchar_t/83511.cc:
5565         Likewise.
5566         * testsuite/21_strings/basic_string_view/operators/char/2.cc:
5567         Likewise.
5568         * testsuite/21_strings/basic_string_view/operators/char/89446.cc:
5569         Likewise.
5570         * testsuite/21_strings/basic_string_view/operators/wchar_t/2.cc:
5571         Likewise.
5572         * testsuite/21_strings/basic_string_view/operators/wchar_t/89446.cc:
5573         Likewise.
5574         * testsuite/21_strings/basic_string_view/range_access/char/1.cc:
5575         Likewise.
5576         * testsuite/21_strings/basic_string_view/range_access/wchar_t/1.cc:
5577         Likewise.
5578         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/1.cc:
5579         Likewise.
5580         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/char/1.cc:
5581         Likewise.
5582         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/char16_t/1.cc:
5583         Likewise.
5584         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/char32_t/1.cc:
5585         Likewise.
5586         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/char8_t/1.cc:
5587         Likewise.
5588         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/wchar_t/1.cc:
5589         Likewise.
5590         * testsuite/21_strings/basic_string_view/requirements/traits_neg.cc:
5591         Likewise.
5592         * testsuite/21_strings/basic_string_view/requirements/typedefs.cc:
5593         Likewise.
5594         * testsuite/21_strings/basic_string_view/typedefs.cc: Likewise.
5595         * testsuite/21_strings/basic_string_view/types/1.cc: Likewise.
5596         * testsuite/21_strings/char_traits/requirements/char/99181.cc:
5597         Likewise.
5598         * testsuite/21_strings/char_traits/requirements/constexpr_functions_c++17.cc:
5599
5600 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
5601
5602         * testsuite/20_util/memory_resource/1.cc: Remove -std=gnu++17
5603         from dg-options directive.
5604         * testsuite/20_util/memory_resource/2.cc: Likewise.
5605         * testsuite/20_util/monotonic_buffer_resource/1.cc: Likewise.
5606         * testsuite/20_util/monotonic_buffer_resource/93208.cc:
5607         Likewise.
5608         * testsuite/20_util/monotonic_buffer_resource/allocate.cc:
5609         Likewise.
5610         * testsuite/20_util/monotonic_buffer_resource/deallocate.cc:
5611         Likewise.
5612         * testsuite/20_util/monotonic_buffer_resource/release.cc:
5613         Likewise.
5614         * testsuite/20_util/monotonic_buffer_resource/upstream_resource.cc:
5615         Likewise.
5616         * testsuite/20_util/polymorphic_allocator/1.cc: Likewise.
5617         * testsuite/20_util/polymorphic_allocator/construct_pair.cc:
5618         Likewise.
5619         * testsuite/20_util/polymorphic_allocator/resource.cc: Likewise.
5620         * testsuite/20_util/polymorphic_allocator/select.cc: Likewise.
5621         * testsuite/20_util/synchronized_pool_resource/allocate.cc:
5622         Likewise.
5623         * testsuite/20_util/synchronized_pool_resource/allocate_single.cc:
5624         Likewise.
5625         * testsuite/20_util/synchronized_pool_resource/cons.cc:
5626         Likewise.
5627         * testsuite/20_util/synchronized_pool_resource/cons_single.cc:
5628         Likewise.
5629         * testsuite/20_util/synchronized_pool_resource/is_equal.cc:
5630         Likewise.
5631         * testsuite/20_util/synchronized_pool_resource/multithreaded.cc:
5632         Likewise.
5633         * testsuite/20_util/synchronized_pool_resource/options.cc:
5634         Likewise.
5635         * testsuite/20_util/synchronized_pool_resource/release.cc:
5636         Likewise.
5637         * testsuite/20_util/synchronized_pool_resource/release_single.cc:
5638         Likewise.
5639         * testsuite/20_util/unsynchronized_pool_resource/allocate-max-chunks.cc:
5640         Likewise.
5641         * testsuite/20_util/unsynchronized_pool_resource/allocate.cc:
5642         Likewise.
5643         * testsuite/20_util/unsynchronized_pool_resource/cons.cc:
5644         Likewise.
5645         * testsuite/20_util/unsynchronized_pool_resource/is_equal.cc:
5646         Likewise.
5647         * testsuite/20_util/unsynchronized_pool_resource/options.cc:
5648         Likewise.
5649         * testsuite/20_util/unsynchronized_pool_resource/release.cc:
5650         Likewise.
5651         * testsuite/21_strings/basic_string/types/pmr_typedefs.cc:
5652         Likewise.
5653         * testsuite/23_containers/deque/types/pmr_typedefs.cc: Likewise.
5654         * testsuite/23_containers/deque/types/pmr_typedefs_debug.cc:
5655         Likewise.
5656         * testsuite/23_containers/forward_list/pmr_typedefs.cc:
5657         Likewise.
5658         * testsuite/23_containers/forward_list/pmr_typedefs_debug.cc:
5659         Likewise.
5660         * testsuite/23_containers/list/pmr_typedefs.cc: Likewise.
5661         * testsuite/23_containers/list/pmr_typedefs_debug.cc: Likewise.
5662         * testsuite/23_containers/map/pmr_typedefs.cc: Likewise.
5663         * testsuite/23_containers/map/pmr_typedefs_debug.cc: Likewise.
5664         * testsuite/23_containers/multimap/pmr_typedefs.cc: Likewise.
5665         * testsuite/23_containers/multimap/pmr_typedefs_debug.cc:
5666         Likewise.
5667         * testsuite/23_containers/multiset/pmr_typedefs.cc: Likewise.
5668         * testsuite/23_containers/multiset/pmr_typedefs_debug.cc:
5669         Likewise.
5670         * testsuite/23_containers/set/pmr_typedefs.cc: Likewise.
5671         * testsuite/23_containers/set/pmr_typedefs_debug.cc: Likewise.
5672         * testsuite/23_containers/unordered_map/pmr_typedefs.cc:
5673         Likewise.
5674         * testsuite/23_containers/unordered_map/pmr_typedefs_debug.cc:
5675         Likewise.
5676         * testsuite/23_containers/unordered_multimap/pmr_typedefs.cc:
5677         Likewise.
5678         * testsuite/23_containers/unordered_multimap/pmr_typedefs_debug.cc:
5679         Likewise.
5680         * testsuite/23_containers/unordered_multiset/pmr_typedefs.cc:
5681         Likewise.
5682         * testsuite/23_containers/unordered_multiset/pmr_typedefs_debug.cc:
5683         Likewise.
5684         * testsuite/23_containers/unordered_set/pmr_typedefs.cc:
5685         Likewise.
5686         * testsuite/23_containers/unordered_set/pmr_typedefs_debug.cc:
5687         Likewise.
5688         * testsuite/23_containers/vector/pmr_typedefs.cc: Likewise.
5689         * testsuite/23_containers/vector/types/pmr_typedefs_debug.cc:
5690         Likewise.
5691         * testsuite/28_regex/match_results/pmr_typedefs.cc: Likewise.
5692
5693 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
5694
5695         * testsuite/29_atomics/atomic/69769.cc: Remove -std=gnu++17 from
5696         dg-options.
5697         * testsuite/29_atomics/atomic/is_always_lock_free.cc:
5698         * testsuite/29_atomics/atomic/requirements/typedefs.cc:
5699         * testsuite/29_atomics/atomic_integral/is_always_lock_free.cc:
5700         * testsuite/29_atomics/atomic_integral/requirements/typedefs.cc:
5701         * testsuite/30_threads/lock_guard/cons/deduction.cc: Likewise.
5702         * testsuite/30_threads/scoped_lock/cons/1.cc: Likewise.
5703         * testsuite/30_threads/scoped_lock/cons/deduction.cc: Likewise.
5704         * testsuite/30_threads/scoped_lock/requirements/explicit_instantiation.cc:
5705         Likewise.
5706         * testsuite/30_threads/scoped_lock/requirements/typedefs.cc:
5707         Likewise.
5708         * testsuite/30_threads/shared_lock/70766.cc: Likewise.
5709         * testsuite/30_threads/shared_mutex/cons/1.cc: Likewise.
5710         * testsuite/30_threads/shared_mutex/cons/assign_neg.cc:
5711         Likewise.
5712         * testsuite/30_threads/shared_mutex/cons/copy_neg.cc: Likewise.
5713         * testsuite/30_threads/shared_mutex/requirements/standard_layout.cc:
5714         Likewise.
5715         * testsuite/30_threads/shared_mutex/try_lock/1.cc: Likewise.
5716         * testsuite/30_threads/shared_mutex/try_lock/2.cc: Likewise.
5717         * testsuite/30_threads/shared_mutex/unlock/1.cc: Likewise.
5718         * testsuite/30_threads/unique_lock/cons/deduction.cc: Likewise.
5719
5720 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
5721
5722         * testsuite/20_util/any/assign/1.cc: Remove -std=gnu++17 from
5723         dg-options directive.
5724         * testsuite/20_util/any/assign/2.cc: Likewise.
5725         * testsuite/20_util/any/assign/emplace.cc: Likewise.
5726         * testsuite/20_util/any/assign/exception.cc: Likewise.
5727         * testsuite/20_util/any/assign/self.cc: Likewise.
5728         * testsuite/20_util/any/cons/1.cc: Likewise.
5729         * testsuite/20_util/any/cons/2.cc: Likewise.
5730         * testsuite/20_util/any/cons/90415.cc: Likewise.
5731         * testsuite/20_util/any/cons/92156.cc: Likewise.
5732         * testsuite/20_util/any/cons/aligned.cc: Likewise.
5733         * testsuite/20_util/any/cons/explicit.cc: Likewise.
5734         * testsuite/20_util/any/cons/in_place.cc: Likewise.
5735         * testsuite/20_util/any/cons/nontrivial.cc: Likewise.
5736         * testsuite/20_util/any/make_any.cc: Likewise.
5737         * testsuite/20_util/any/misc/any_cast.cc: Likewise.
5738         * testsuite/20_util/any/misc/any_cast_neg.cc: Likewise.
5739         * testsuite/20_util/any/misc/any_cast_no_rtti.cc: Likewise.
5740         * testsuite/20_util/any/misc/swap.cc: Likewise.
5741         * testsuite/20_util/any/modifiers/1.cc: Likewise.
5742         * testsuite/20_util/any/modifiers/83658.cc: Likewise.
5743         * testsuite/20_util/any/modifiers/92156.cc: Likewise.
5744         * testsuite/20_util/any/observers/type.cc: Likewise.
5745         * testsuite/20_util/any/requirements.cc: Likewise.
5746         * testsuite/20_util/any/typedefs.cc: Likewise.
5747         * testsuite/20_util/optional/77288.cc: Likewise.
5748         * testsuite/20_util/optional/84601.cc: Likewise.
5749         * testsuite/20_util/optional/assignment/1.cc: Likewise.
5750         * testsuite/20_util/optional/assignment/2.cc: Likewise.
5751         * testsuite/20_util/optional/assignment/3.cc: Likewise.
5752         * testsuite/20_util/optional/assignment/4.cc: Likewise.
5753         * testsuite/20_util/optional/assignment/5.cc: Likewise.
5754         * testsuite/20_util/optional/assignment/6.cc: Likewise.
5755         * testsuite/20_util/optional/assignment/7.cc: Likewise.
5756         * testsuite/20_util/optional/assignment/8.cc: Likewise.
5757         * testsuite/20_util/optional/assignment/9.cc: Likewise.
5758         * testsuite/20_util/optional/bad_access.cc: Likewise.
5759         * testsuite/20_util/optional/cons/77727.cc: Likewise.
5760         * testsuite/20_util/optional/cons/85642.cc: Likewise.
5761         * testsuite/20_util/optional/cons/copy.cc: Likewise.
5762         * testsuite/20_util/optional/cons/deduction.cc: Likewise.
5763         * testsuite/20_util/optional/cons/default.cc: Likewise.
5764         * testsuite/20_util/optional/cons/move.cc: Likewise.
5765         * testsuite/20_util/optional/cons/trivial.cc: Likewise.
5766         * testsuite/20_util/optional/cons/value.cc: Likewise.
5767         * testsuite/20_util/optional/cons/value_neg.cc: Likewise.
5768         * testsuite/20_util/optional/constexpr/cons/default.cc:
5769         Likewise.
5770         * testsuite/20_util/optional/constexpr/cons/value.cc: Likewise.
5771         * testsuite/20_util/optional/constexpr/in_place.cc: Likewise.
5772         * testsuite/20_util/optional/constexpr/make_optional.cc:
5773         Likewise.
5774         * testsuite/20_util/optional/constexpr/nullopt.cc: Likewise.
5775         * testsuite/20_util/optional/constexpr/observers/1.cc: Likewise.
5776         * testsuite/20_util/optional/constexpr/observers/2.cc: Likewise.
5777         * testsuite/20_util/optional/constexpr/observers/3.cc: Likewise.
5778         * testsuite/20_util/optional/constexpr/observers/4.cc: Likewise.
5779         * testsuite/20_util/optional/constexpr/observers/5.cc: Likewise.
5780         * testsuite/20_util/optional/constexpr/relops/1.cc: Likewise.
5781         * testsuite/20_util/optional/constexpr/relops/2.cc: Likewise.
5782         * testsuite/20_util/optional/constexpr/relops/3.cc: Likewise.
5783         * testsuite/20_util/optional/constexpr/relops/4.cc: Likewise.
5784         * testsuite/20_util/optional/constexpr/relops/5.cc: Likewise.
5785         * testsuite/20_util/optional/constexpr/relops/6.cc: Likewise.
5786         * testsuite/20_util/optional/hash.cc: Likewise.
5787         * testsuite/20_util/optional/in_place.cc: Likewise.
5788         * testsuite/20_util/optional/make_optional.cc: Likewise.
5789         * testsuite/20_util/optional/nullopt.cc: Likewise.
5790         * testsuite/20_util/optional/observers/1.cc: Likewise.
5791         * testsuite/20_util/optional/observers/2.cc: Likewise.
5792         * testsuite/20_util/optional/observers/3.cc: Likewise.
5793         * testsuite/20_util/optional/observers/4.cc: Likewise.
5794         * testsuite/20_util/optional/observers/5.cc: Likewise.
5795         * testsuite/20_util/optional/observers/6.cc: Likewise.
5796         * testsuite/20_util/optional/relops/1.cc: Likewise.
5797         * testsuite/20_util/optional/relops/2.cc: Likewise.
5798         * testsuite/20_util/optional/relops/3.cc: Likewise.
5799         * testsuite/20_util/optional/relops/4.cc: Likewise.
5800         * testsuite/20_util/optional/relops/5.cc: Likewise.
5801         * testsuite/20_util/optional/relops/6.cc: Likewise.
5802         * testsuite/20_util/optional/relops/7.cc: Likewise.
5803         * testsuite/20_util/optional/requirements.cc: Likewise.
5804         * testsuite/20_util/optional/swap/1.cc: Likewise.
5805         * testsuite/20_util/optional/swap/2.cc: Likewise.
5806         * testsuite/20_util/optional/typedefs.cc: Likewise.
5807         * testsuite/20_util/variant/80165.cc: Likewise.
5808         * testsuite/20_util/variant/85183.cc: Likewise.
5809         * testsuite/20_util/variant/86874.cc: Likewise.
5810         * testsuite/20_util/variant/87431.cc: Likewise.
5811         * testsuite/20_util/variant/87619.cc: Likewise.
5812         * testsuite/20_util/variant/91807.cc: Likewise.
5813         * testsuite/20_util/variant/any.cc: Likewise.
5814         * testsuite/20_util/variant/compile.cc: Likewise.
5815         * testsuite/20_util/variant/deduction.cc: Likewise.
5816         * testsuite/20_util/variant/exception_safety.cc: Likewise.
5817         * testsuite/20_util/variant/hash.cc: Likewise.
5818         * testsuite/20_util/variant/index_type.cc: Likewise.
5819         * testsuite/20_util/variant/relops/89851.cc: Likewise.
5820         * testsuite/20_util/variant/relops/90008.cc: Likewise.
5821         * testsuite/20_util/variant/run.cc: Likewise.
5822         * testsuite/20_util/variant/visit.cc: Likewise.
5823
5824 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
5825
5826         * testsuite/27_io/basic_filebuf/open/char/path.cc: Remove
5827         -std=gnu++17 from dg-options directive.
5828         * testsuite/27_io/basic_fstream/cons/char/path.cc: Likewise.
5829         * testsuite/27_io/basic_fstream/open/char/path.cc: Likewise.
5830         * testsuite/27_io/basic_ifstream/cons/char/path.cc: Likewise.
5831         * testsuite/27_io/basic_ifstream/open/char/path.cc: Likewise.
5832         * testsuite/27_io/basic_ofstream/cons/char/path.cc: Likewise.
5833         * testsuite/27_io/basic_ofstream/open/char/path.cc: Likewise.
5834         * testsuite/27_io/filesystem/directory_entry/86597.cc: Likewise.
5835         * testsuite/27_io/filesystem/directory_entry/lwg3171.cc:
5836         Likewise.
5837         * testsuite/27_io/filesystem/file_status/1.cc: Likewise.
5838         * testsuite/27_io/filesystem/filesystem_error/cons.cc: Likewise.
5839         * testsuite/27_io/filesystem/filesystem_error/copy.cc: Likewise.
5840         * testsuite/27_io/filesystem/iterators/91067.cc: Likewise.
5841         * testsuite/27_io/filesystem/iterators/caching.cc: Likewise.
5842         * testsuite/27_io/filesystem/iterators/directory_iterator.cc:
5843         Likewise.
5844         * testsuite/27_io/filesystem/iterators/pop.cc: Likewise.
5845         * testsuite/27_io/filesystem/iterators/recursion_pending.cc:
5846         Likewise.
5847         * testsuite/27_io/filesystem/iterators/recursive_directory_iterator.cc:
5848         Likewise.
5849         * testsuite/27_io/filesystem/operations/absolute.cc: Likewise.
5850         * testsuite/27_io/filesystem/operations/all.cc: Likewise.
5851         * testsuite/27_io/filesystem/operations/canonical.cc: Likewise.
5852         * testsuite/27_io/filesystem/operations/copy.cc: Likewise.
5853         * testsuite/27_io/filesystem/operations/copy_file.cc: Likewise.
5854         * testsuite/27_io/filesystem/operations/create_directories.cc:
5855         Likewise.
5856         * testsuite/27_io/filesystem/operations/create_directory.cc:
5857         Likewise.
5858         * testsuite/27_io/filesystem/operations/create_symlink.cc:
5859         Likewise.
5860         * testsuite/27_io/filesystem/operations/current_path.cc:
5861         Likewise.
5862         * testsuite/27_io/filesystem/operations/equivalent.cc: Likewise.
5863         * testsuite/27_io/filesystem/operations/exists.cc: Likewise.
5864         * testsuite/27_io/filesystem/operations/file_size.cc: Likewise.
5865         * testsuite/27_io/filesystem/operations/is_empty.cc: Likewise.
5866         * testsuite/27_io/filesystem/operations/last_write_time.cc:
5867         Likewise.
5868         * testsuite/27_io/filesystem/operations/permissions.cc:
5869         Likewise.
5870         * testsuite/27_io/filesystem/operations/proximate.cc: Likewise.
5871         * testsuite/27_io/filesystem/operations/read_symlink.cc:
5872         Likewise.
5873         * testsuite/27_io/filesystem/operations/relative.cc: Likewise.
5874         * testsuite/27_io/filesystem/operations/remove.cc: Likewise.
5875         * testsuite/27_io/filesystem/operations/remove_all.cc: Likewise.
5876         * testsuite/27_io/filesystem/operations/rename.cc: Likewise.
5877         * testsuite/27_io/filesystem/operations/resize_file.cc:
5878         Likewise.
5879         * testsuite/27_io/filesystem/operations/space.cc: Likewise.
5880         * testsuite/27_io/filesystem/operations/status.cc: Likewise.
5881         * testsuite/27_io/filesystem/operations/symlink_status.cc:
5882         Likewise.
5883         * testsuite/27_io/filesystem/operations/temp_directory_path.cc:
5884         Likewise.
5885         * testsuite/27_io/filesystem/operations/weakly_canonical.cc:
5886         Likewise.
5887         * testsuite/27_io/filesystem/path/append/path.cc: Likewise.
5888         * testsuite/27_io/filesystem/path/append/source.cc: Likewise.
5889         * testsuite/27_io/filesystem/path/assign/assign.cc: Likewise.
5890         * testsuite/27_io/filesystem/path/assign/copy.cc: Likewise.
5891         * testsuite/27_io/filesystem/path/compare/compare.cc: Likewise.
5892         * testsuite/27_io/filesystem/path/compare/lwg2936.cc: Likewise.
5893         * testsuite/27_io/filesystem/path/compare/path.cc: Likewise.
5894         * testsuite/27_io/filesystem/path/compare/strings.cc: Likewise.
5895         * testsuite/27_io/filesystem/path/concat/92853.cc: Likewise.
5896         * testsuite/27_io/filesystem/path/concat/94063.cc: Likewise.
5897         * testsuite/27_io/filesystem/path/concat/path.cc: Likewise.
5898         * testsuite/27_io/filesystem/path/concat/strings.cc: Likewise.
5899         * testsuite/27_io/filesystem/path/construct/80762.cc: Likewise.
5900         * testsuite/27_io/filesystem/path/construct/90281.cc: Likewise.
5901         * testsuite/27_io/filesystem/path/construct/90634.cc: Likewise.
5902         * testsuite/27_io/filesystem/path/construct/copy.cc: Likewise.
5903         * testsuite/27_io/filesystem/path/construct/default.cc:
5904         Likewise.
5905         * testsuite/27_io/filesystem/path/construct/format.cc: Likewise.
5906         * testsuite/27_io/filesystem/path/construct/locale.cc: Likewise.
5907         * testsuite/27_io/filesystem/path/construct/range.cc: Likewise.
5908         * testsuite/27_io/filesystem/path/construct/string_view.cc:
5909         Likewise.
5910         * testsuite/27_io/filesystem/path/decompose/extension.cc:
5911         Likewise.
5912         * testsuite/27_io/filesystem/path/decompose/filename.cc:
5913         Likewise.
5914         * testsuite/27_io/filesystem/path/decompose/parent_path.cc:
5915         Likewise.
5916         * testsuite/27_io/filesystem/path/decompose/relative_path.cc:
5917         Likewise.
5918         * testsuite/27_io/filesystem/path/decompose/root_directory.cc:
5919         Likewise.
5920         * testsuite/27_io/filesystem/path/decompose/root_name.cc:
5921         Likewise.
5922         * testsuite/27_io/filesystem/path/decompose/root_path.cc:
5923         Likewise.
5924         * testsuite/27_io/filesystem/path/decompose/stem.cc: Likewise.
5925         * testsuite/27_io/filesystem/path/factory/u8path-char8_t.cc:
5926         Likewise.
5927         * testsuite/27_io/filesystem/path/factory/u8path.cc: Likewise.
5928         * testsuite/27_io/filesystem/path/generation/normal.cc:
5929         Likewise.
5930         * testsuite/27_io/filesystem/path/generation/normal2.cc:
5931         Likewise.
5932         * testsuite/27_io/filesystem/path/generation/proximate.cc:
5933         Likewise.
5934         * testsuite/27_io/filesystem/path/generation/relative.cc:
5935         Likewise.
5936         * testsuite/27_io/filesystem/path/generic/94242.cc: Likewise.
5937         * testsuite/27_io/filesystem/path/generic/generic_string.cc:
5938         Likewise.
5939         * testsuite/27_io/filesystem/path/generic/utf.cc: Likewise.
5940         * testsuite/27_io/filesystem/path/generic/wchar_t.cc: Likewise.
5941         * testsuite/27_io/filesystem/path/io/dr2989.cc: Likewise.
5942         * testsuite/27_io/filesystem/path/itr/components.cc: Likewise.
5943         * testsuite/27_io/filesystem/path/itr/traversal.cc: Likewise.
5944         * testsuite/27_io/filesystem/path/modifiers/clear.cc: Likewise.
5945         * testsuite/27_io/filesystem/path/modifiers/make_preferred.cc:
5946         Likewise.
5947         * testsuite/27_io/filesystem/path/modifiers/remove_filename.cc:
5948         Likewise.
5949         * testsuite/27_io/filesystem/path/modifiers/replace_extension.cc:
5950         Likewise.
5951         * testsuite/27_io/filesystem/path/modifiers/replace_filename.cc:
5952         Likewise.
5953         * testsuite/27_io/filesystem/path/modifiers/swap.cc: Likewise.
5954         * testsuite/27_io/filesystem/path/native/alloc.cc: Likewise.
5955         * testsuite/27_io/filesystem/path/native/string-char8_t.cc:
5956         Likewise.
5957         * testsuite/27_io/filesystem/path/native/string.cc: Likewise.
5958         * testsuite/27_io/filesystem/path/nonmember/append.cc: Likewise.
5959         * testsuite/27_io/filesystem/path/nonmember/cmp.cc: Likewise.
5960         * testsuite/27_io/filesystem/path/nonmember/hash_value.cc:
5961         Likewise.
5962         * testsuite/27_io/filesystem/path/query/empty.cc: Likewise.
5963         * testsuite/27_io/filesystem/path/query/empty_neg.cc:
5964         * testsuite/27_io/filesystem/path/query/has_extension.cc:
5965         Likewise.
5966         * testsuite/27_io/filesystem/path/query/has_filename.cc:
5967         Likewise.
5968         * testsuite/27_io/filesystem/path/query/has_parent_path.cc:
5969         Likewise.
5970         * testsuite/27_io/filesystem/path/query/has_relative_path.cc:
5971         Likewise.
5972         * testsuite/27_io/filesystem/path/query/has_root_directory.cc:
5973         Likewise.
5974         * testsuite/27_io/filesystem/path/query/has_root_name.cc:
5975         Likewise.
5976         * testsuite/27_io/filesystem/path/query/has_root_path.cc:
5977         Likewise.
5978         * testsuite/27_io/filesystem/path/query/has_stem.cc: Likewise.
5979         * testsuite/27_io/filesystem/path/query/is_absolute.cc:
5980         Likewise.
5981         * testsuite/27_io/filesystem/path/query/is_relative.cc:
5982         Likewise.
5983         * testsuite/experimental/filesystem/path/construct/string_view.cc:
5984         Likewise.
5985
5986 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
5987
5988         * testsuite/20_util/specialized_algorithms/pstl/uninitialized_construct.cc:
5989         Remove -std=gnu++17 from dg-options.
5990         * testsuite/20_util/specialized_algorithms/pstl/uninitialized_copy_move.cc:
5991         Likewise.
5992         * testsuite/20_util/specialized_algorithms/pstl/uninitialized_fill_destroy.cc:
5993         Likewise.
5994         * testsuite/25_algorithms/pstl/alg_merge/inplace_merge.cc:
5995         Likewise.
5996         * testsuite/25_algorithms/pstl/alg_merge/merge.cc: Likewise.
5997         * testsuite/25_algorithms/pstl/alg_modifying_operations/copy_if.cc:
5998         Likewise.
5999         * testsuite/25_algorithms/pstl/alg_modifying_operations/copy_move.cc:
6000         Likewise.
6001         * testsuite/25_algorithms/pstl/alg_modifying_operations/fill.cc:
6002         Likewise.
6003         * testsuite/25_algorithms/pstl/alg_modifying_operations/generate.cc:
6004         Likewise.
6005         * testsuite/25_algorithms/pstl/alg_modifying_operations/is_partitioned.cc:
6006         Likewise.
6007         * testsuite/25_algorithms/pstl/alg_modifying_operations/partition.cc:
6008         Likewise.
6009         * testsuite/25_algorithms/pstl/alg_modifying_operations/partition_copy.cc:
6010         Likewise.
6011         * testsuite/25_algorithms/pstl/alg_modifying_operations/remove.cc:
6012         Likewise.
6013         * testsuite/25_algorithms/pstl/alg_modifying_operations/remove_copy.cc:
6014         Likewise.
6015         * testsuite/25_algorithms/pstl/alg_modifying_operations/replace.cc:
6016         Likewise.
6017         * testsuite/25_algorithms/pstl/alg_modifying_operations/replace_copy.cc:
6018         Likewise.
6019         * testsuite/25_algorithms/pstl/alg_modifying_operations/rotate.cc:
6020         Likewise.
6021         * testsuite/25_algorithms/pstl/alg_modifying_operations/rotate_copy.cc:
6022         Likewise.
6023         * testsuite/25_algorithms/pstl/alg_modifying_operations/swap_ranges.cc:
6024         Likewise.
6025         * testsuite/25_algorithms/pstl/alg_modifying_operations/transform_binary.cc:
6026         Likewise.
6027         * testsuite/25_algorithms/pstl/alg_modifying_operations/transform_unary.cc:
6028         Likewise.
6029         * testsuite/25_algorithms/pstl/alg_modifying_operations/unique.cc:
6030         Likewise.
6031         * testsuite/25_algorithms/pstl/alg_modifying_operations/unique_copy_equal.cc:
6032         Likewise.
6033         * testsuite/25_algorithms/pstl/alg_nonmodifying/adjacent_find.cc:
6034         Likewise.
6035         * testsuite/25_algorithms/pstl/alg_nonmodifying/all_of.cc:
6036         Likewise.
6037         * testsuite/25_algorithms/pstl/alg_nonmodifying/any_of.cc:
6038         Likewise.
6039         * testsuite/25_algorithms/pstl/alg_nonmodifying/count.cc:
6040         Likewise.
6041         * testsuite/25_algorithms/pstl/alg_nonmodifying/equal.cc:
6042         Likewise.
6043         * testsuite/25_algorithms/pstl/alg_nonmodifying/find.cc:
6044         Likewise.
6045         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_end.cc:
6046         Likewise.
6047         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_first_of.cc:
6048         Likewise.
6049         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_if.cc:
6050         Likewise.
6051         * testsuite/25_algorithms/pstl/alg_nonmodifying/for_each.cc:
6052         Likewise.
6053         * testsuite/25_algorithms/pstl/alg_nonmodifying/mismatch.cc:
6054         Likewise.
6055         * testsuite/25_algorithms/pstl/alg_nonmodifying/none_of.cc:
6056         Likewise.
6057         * testsuite/25_algorithms/pstl/alg_nonmodifying/nth_element.cc:
6058         Likewise.
6059         * testsuite/25_algorithms/pstl/alg_nonmodifying/reverse.cc:
6060         Likewise.
6061         * testsuite/25_algorithms/pstl/alg_nonmodifying/reverse_copy.cc:
6062         Likewise.
6063         * testsuite/25_algorithms/pstl/alg_nonmodifying/search_n.cc:
6064         Likewise.
6065         * testsuite/25_algorithms/pstl/alg_sorting/includes.cc:
6066         Likewise.
6067         * testsuite/25_algorithms/pstl/alg_sorting/is_heap.cc: Likewise.
6068         * testsuite/25_algorithms/pstl/alg_sorting/is_sorted.cc:
6069         Likewise.
6070         * testsuite/25_algorithms/pstl/alg_sorting/lexicographical_compare.cc:
6071         Likewise.
6072         * testsuite/25_algorithms/pstl/alg_sorting/minmax_element.cc:
6073         Likewise.
6074         * testsuite/25_algorithms/pstl/alg_sorting/partial_sort.cc:
6075         Likewise.
6076         * testsuite/25_algorithms/pstl/alg_sorting/partial_sort_copy.cc:
6077         Likewise.
6078         * testsuite/25_algorithms/pstl/alg_sorting/set.cc: Likewise.
6079         * testsuite/25_algorithms/pstl/alg_sorting/sort.cc: Likewise.
6080         * testsuite/25_algorithms/pstl/feature_test-2.cc: Likewise.
6081         * testsuite/25_algorithms/pstl/feature_test-3.cc: Likewise.
6082         * testsuite/25_algorithms/pstl/feature_test-4.cc: Likewise.
6083         * testsuite/25_algorithms/pstl/feature_test-5.cc: Likewise.
6084         * testsuite/25_algorithms/pstl/feature_test.cc: Likewise.
6085         * testsuite/26_numerics/pstl/numeric_ops/adjacent_difference.cc:
6086         Likewise.
6087         * testsuite/26_numerics/pstl/numeric_ops/reduce.cc: Likewise.
6088         * testsuite/26_numerics/pstl/numeric_ops/scan.cc: Likewise.
6089         * testsuite/26_numerics/pstl/numeric_ops/transform_reduce.cc:
6090         Likewise.
6091         * testsuite/26_numerics/pstl/numeric_ops/transform_scan.cc:
6092         Likewise.
6093
6094 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
6095
6096         * testsuite/20_util/scoped_allocator/69293_neg.cc: Add dg-error
6097         for additional errors in C++20.
6098         * testsuite/20_util/specialized_algorithms/memory_management_tools/destroy_neg.cc:
6099         Likewise.
6100         * testsuite/20_util/uses_allocator/69293_neg.cc: Likewise.
6101         * testsuite/27_io/filesystem/path/io/dr2989.cc: Likewise.
6102
6103 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
6104
6105         * testsuite/20_util/variant/compile.cc: Rename 'any' to avoid
6106         clash with std::any.
6107
6108 2021-05-07  Jonathan Wakely  <jwakely@redhat.com>
6109
6110         * include/std/istream (__rvalue_stream_extraction_t): Replace
6111         use of __rval_streamable.
6112         * include/std/ostream (__rvalue_stream_insertion_t): Likewise.
6113         (__rval_streamable): Remove.
6114         (_Require_derived_from_ios_base, __derived_from_ios_base): New
6115         helper for checking constraints.
6116         * testsuite/27_io/basic_istream/extractors_other/char/4.cc: Fix
6117         reference to the wrong subclause of the standard.
6118         * testsuite/27_io/basic_istream/extractors_other/wchar_t/4.cc:
6119         Likewise.
6120         * testsuite/27_io/basic_ostream/inserters_other/char/6.cc:
6121         Likewise.
6122         * testsuite/27_io/basic_ostream/inserters_other/wchar_t/6.cc:
6123         Likewise.
6124         * testsuite/27_io/basic_ostream/inserters_other/char/99692.cc:
6125         New test.
6126         * testsuite/27_io/filesystem/path/io/dr2989.cc: Adjust pruned
6127         errors.
6128
6129 2021-05-06  Jonathan Wakely  <jwakely@redhat.com>
6130
6131         * include/bits/stl_algobase.h (__copy_move, __copy_move_backward):
6132         Improve static_assert messages.
6133         * testsuite/25_algorithms/copy/58982.cc: Adjust expected output.
6134         * testsuite/25_algorithms/copy_n/58982.cc: Likewise.
6135
6136 2021-05-06  Patrick Palka  <ppalka@redhat.com>
6137
6138         * include/std/ranges (filter_view::_Iterator::base): Make the
6139         const& overload unconstrained and return a const reference as
6140         per LWG 3533.  Make unconditionally noexcept.
6141         (transform_view::_Iterator::base): Likewise.
6142         (elements_view::_Iterator::base): Likewise.
6143
6144 2021-05-06  Patrick Palka  <ppalka@redhat.com>
6145
6146         * include/bits/stl_iterator.h (move_iterator::base): Make the
6147         const& overload unconstrained and return a const reference as
6148         per LWG 3391.  Make unconditionally noexcept.
6149         (counted_iterator::base): Likewise.
6150         * testsuite/24_iterators/move_iterator/lwg3391.cc: New test.
6151         * testsuite/24_iterators/move_iterator/move_only.cc: Adjust
6152         has_member_base concept to decay-copy the result of base().
6153
6154 2021-05-06  Jonathan Wakely  <jwakely@redhat.com>
6155
6156         * include/std/type_traits (remove_cvref_t): Define in terms of
6157         remove_cvref.
6158         * testsuite/20_util/remove_cvref/value.cc: Check alias.
6159
6160 2021-05-06  Jonathan Wakely  <jwakely@redhat.com>
6161
6162         Revert:
6163         2021-05-05  Jonathan Wakely  <jwakely@redhat.com>
6164
6165         * include/std/charconv (__from_chars_alnum): Pass unsigned
6166         char to std::isdigit.
6167
6168 2021-05-05  Patrick Palka  <ppalka@redhat.com>
6169
6170         * include/bits/ranges_util.h (enable_borrowed_range<subrange>):
6171         Remove constraints on this partial specialization.
6172         * include/std/ranges (enable_borrowed_range<iota_view>):
6173         Likewise.
6174
6175 2021-05-05  Patrick Palka  <ppalka@redhat.com>
6176
6177         * include/std/ranges (transform_view::_Iterator::iter_swap):
6178         Remove as per LWG 3520.
6179         (join_view::_Iterator::iter_swap): Add indirectly_swappable
6180         constraint as per LWG 3517.
6181
6182 2021-05-05  Jonathan Wakely  <jwakely@redhat.com>
6183
6184         * testsuite/20_util/function_objects/invoke/3.cc: Check feature
6185         test macro.
6186         * testsuite/20_util/function_objects/invoke/version.cc: New test.
6187
6188 2021-05-05  Jonathan Wakely  <jwakely@redhat.com>
6189
6190         * include/std/charconv (__from_chars_alnum): Pass unsigned
6191         char to std::isdigit.
6192
6193 2021-05-05  Corentin Gay  <gay@adacore.com>
6194
6195         * acinclude.m4: Add VxWorks-specific case for the
6196         configuration of ctypes.
6197         * configure: Regenerate.
6198         * config/locale/vxworks/ctype_members.cc: Add VxWorks-specific
6199         version.
6200         * config/os/vxworks/ctype_base.h: Adjust for VxWorks7+.
6201         * config/os/vxworks/ctype_configure_char.cc: Likewise.
6202         * config/os/vxworks/ctype_inline.h: Likewise.
6203         * testsuite/28_regex/traits/char/isctype.cc: Defines
6204         NEWLINE_IN_CLASS_BLANK if the target is VxWorks.
6205         * testsuite/28_regex/traits/wchar_t/isctype.cc: Likewise.
6206
6207 2021-05-04  Jonathan Wakely  <jwakely@redhat.com>
6208
6209         * include/std/future (promise::set_value): Check for existence
6210         of shared state before dereferncing it.
6211         (promise::set_exception, promise::set_value_at_thread_exit)
6212         (promise::set_exception_at_thread_exit): Likewise.
6213         (promise<R&>::set_value, promise<R&>::set_exception)
6214         (promise<R&>::set_value_at_thread_exit)
6215         (promise<R&>::set_exception_at_thread_exit): Likewise.
6216         (promise<void>::set_value, promise<void>::set_exception)
6217         (promise<void>::set_value_at_thread_exit)
6218         (promise<void>::set_exception_at_thread_exit): Likewise.
6219         * testsuite/30_threads/promise/members/at_thread_exit2.cc:
6220         Remove unused variable.
6221
6222 2021-05-04  Jonathan Wakely  <jwakely@redhat.com>
6223
6224         * include/bits/basic_string.h (basic_string(const CharT*, const A&)):
6225         Do not do arithmetic on null pointer.
6226
6227 2021-05-04  Jonathan Wakely  <jwakely@redhat.com>
6228
6229         * include/ext/pb_ds/detail/cc_hash_table_map_/cc_ht_map_.hpp
6230         (find_key_pointer(key_const_reference, false_type))
6231         (find_key_pointer(key_const_reference, true_type)): Do not
6232         dereference null pointer.
6233
6234 2021-05-04  Jonathan Wakely  <jwakely@redhat.com>
6235
6236         * testsuite/20_util/from_chars/3.cc: Use unsigned type to avoid
6237         overflow.
6238         * testsuite/24_iterators/reverse_iterator/2.cc: Do not add
6239         non-zero value to null pointer.
6240         * testsuite/25_algorithms/copy_backward/move_iterators/69478.cc:
6241         Use past-the-end iterator for result.
6242         * testsuite/25_algorithms/move_backward/69478.cc: Likewise.
6243         * testsuite/25_algorithms/move_backward/93872.cc: Likewise.
6244
6245 2021-05-04  Jonathan Wakely  <jwakely@redhat.com>
6246
6247         PR libstdc++/100384
6248         * include/std/variant (__get_t): New alias template yielding the
6249         return type of std::get<N> on a variant.
6250         (__visit_result_t): New alias template yielding the result of
6251         std::visit.
6252         (__same_types): Move into namespace __detail::__variant.
6253         (__check_visitor_results): Likewise. Use __invoke_result_t and
6254         __get_t.
6255         (__check_visitor_result): Remove.
6256         (visit): Use __visit_result_t for return type.
6257         * testsuite/20_util/variant/100384.cc: New test.
6258
6259 2021-05-04  Jonathan Wakely  <jwakely@redhat.com>
6260
6261         * acinclude.m4 (GLIBCXX_ENABLE_INT128_FLOAT128): Remove
6262         checks for __int128 and rename to GLIBCXX_ENABLE_FLOAT128.
6263         * config.h.in: Regenerate.
6264         * configure: Regenerate.
6265         * configure.ac: Adjust to use GLIBCXX_ENABLE_FLOAT128.
6266         * include/bits/random.h (_Select_uint_least_t<s, 1>):
6267         Use __SIZEOF_INT128__ to decide whether to use __int128.
6268         * include/std/charconv (__to_chars_unsigned_type): Likewise.
6269
6270 2021-05-03  Gerald Pfeifer  <gerald@pfeifer.com>
6271
6272         * doc/xml/manual/ctype.xml: Move unix.org reference to https.
6273         * doc/html/manual/facets.html: Regenerate.
6274
6275 2021-04-30  Patrick Palka  <ppalka@redhat.com>
6276
6277         * include/std/ranges (__detail::__non_propating_cache): Define
6278         as per P2328.
6279         (join_view): Remove constraints on the value and reference types
6280         of the wrapped iterator type as per P2328.
6281         (join_view::_Iterator::_M_satisfy): Adjust as per P2328.
6282         (join_view::_Iterator::operator++): Likewise.
6283         (join_view::_M_inner): Use __non_propating_cache as per P2328.
6284         Remove now-redundant use of __maybe_present_t.
6285         * testsuite/std/ranges/adaptors/join.cc: Include <array>.
6286         (test10): New test.
6287
6288 2021-04-30  Jonathan Wakely  <jwakely@redhat.com>
6289
6290         * include/bits/basic_string.h (__cpp_lib_constexpr_string):
6291         Only define for C++17 and later.
6292         * include/std/version (__cpp_lib_semaphore): Fix condition
6293         to match the one in <semaphore>.
6294
6295 2021-04-30  Jonathan Wakely  <jwakely@redhat.com>
6296
6297         * acinclude.m4 (GLIBCXX_CHECK_INT64_T): Delete.
6298         * config.h.in: Regenerate.
6299         * configure: Regenerate.
6300         * configure.ac: Do not use GLIBCXX_CHECK_INT64_T.
6301         * include/bits/postypes.h: Remove include of <stdint.h> and
6302         definition/undefinition of the __STDC_LIMIT_MACROS and
6303         __STDC_CONSTANT_MACROS macros.
6304         (streamoff): Use __INT64_TYPE__ if defined.
6305
6306 2021-04-30  Patrick Palka  <ppalka@redhat.com>
6307
6308         * include/std/ranges (split_view::_InnerIter::operator++):
6309         Depend on _Base instead of _Vp directly, as per LWG 3532.
6310
6311 2021-04-30  Patrick Palka  <ppalka@redhat.com>
6312
6313         * include/bits/ranges_util.h (subrange::subrange): Avoid
6314         list-initialization in delegating constructor.
6315         * include/std/ranges (single_view): Replace implicit guide
6316         with explicit deduction guide that decays its argument.
6317         (_Single::operator()): Avoid CTAD when constructing the
6318         single_view object.
6319         (_Iota::operator()): Avoid list-initialization.
6320         (__detail::__can_filter_view, _Filter::operator()): Likewise.
6321         (__detail::__can_transform_view, _Transform::operator()): Likewise.
6322         (take_view::begin): Likewise.
6323         (__detail::__can_take_view, _Take::operator()): Likewise.
6324         (__detail::__can_take_while_view, _TakeWhile::operator()): Likewise.
6325         (__detail::__can_drop_view, _Drop::operator()): Likewise.
6326         (__detail::__can_drop_while_view, _DropWhile::operator()): Likewise.
6327         (split_view::split_view): Use views::single when initializing
6328         _M_pattern.
6329         (__detail::__can_split_view, _Split::operator()): Avoid
6330         list-initialization.
6331         (_Counted::operator()): Likewise.
6332         * testsuite/std/ranges/p2367.cc: New test.
6333
6334 2021-04-30  Jonathan Wakely  <jwakely@redhat.com>
6335
6336         PR libstdc++/60497
6337         * include/bits/basic_ios.tcc (basic_ios::copyfmt): use
6338         std::addressof.
6339         * include/bits/basic_string.tcc (basic_string::swap)
6340         (basic_string::assign): Likewise.
6341         * include/bits/deque.tcc (deque::operator=(const deque&)):
6342         Likewise.
6343         * include/bits/stl_tree.h (_Rb_tree::operator=(const * _Rb_tree&)):
6344         Likewise.
6345         * include/bits/vector.tcc (vector::operator=(const vector&)):
6346         Likewise.
6347
6348 2021-04-30  Jonathan Wakely  <jwakely@redhat.com>
6349
6350         * include/std/istream (operator>>(Istream&&, x&)): Simplify, as
6351         per LWG 1203.
6352         * include/std/ostream (operator<<(Ostream&&, const x&)):
6353         Likewise.
6354         * testsuite/27_io/basic_istream/extractors_character/char/lwg2499_neg.cc:
6355         Adjust dg-error pattern.
6356         * testsuite/27_io/basic_istream/extractors_character/wchar_t/lwg2499_neg.cc:
6357         Likewise.
6358         * testsuite/27_io/basic_istream/extractors_other/char/4.cc: Define
6359         is_extractable trait to replace std::__is_extractable. Make it
6360         work with rvalue streams as well as lvalues, to replace f() and
6361         g() helper functions.
6362         * testsuite/27_io/basic_istream/extractors_other/wchar_t/4.cc:
6363         Likewise.
6364         * testsuite/27_io/basic_ostream/inserters_other/char/6.cc:
6365         Define is_insertable trait to replace std::__is_insertable. Make
6366         it work with rvalue streams as well as lvalues, to replace f()
6367         and g() helper functions.
6368         * testsuite/27_io/basic_ostream/inserters_other/wchar_t/6.cc:
6369         Likewise.
6370         * testsuite/27_io/filesystem/path/io/dr2989.cc: Prune additional
6371         errors from new constraints.
6372         * testsuite/27_io/rvalue_streams-2.cc: Remove PR 80675 checks,
6373         which are no longer expected to compile.
6374         * testsuite/27_io/rvalue_streams.cc: Adjust existing test.
6375         Verify LWG 1203 changes.
6376
6377 2021-04-30  Jonathan Wakely  <jwakely@redhat.com>
6378
6379         PR libstdc++/100285
6380         * include/experimental/socket (__basic_socket_impl::set_option)
6381         (__basic_socket_impl::get_option) [!_GLIBCXX_HAVE_SYS_SOCKET_H]:
6382         Just set error code.
6383         * testsuite/experimental/net/socket/socket_base.cc: CHeck
6384         for <sys/socket.h> not <socket.h>.
6385
6386 2021-04-30  Jonathan Wakely  <jwakely@redhat.com>
6387
6388         PR libstdc++/100180
6389         PR libstdc++/100286
6390         PR libstdc++/100351
6391         * testsuite/experimental/net/internet/address/v4/comparisons.cc:
6392         Use new effective-target keyword.
6393         * testsuite/experimental/net/internet/address/v4/cons.cc:
6394         Likewise.
6395         * testsuite/experimental/net/internet/address/v4/creation.cc:
6396         Likewise.
6397         * testsuite/experimental/net/internet/address/v4/members.cc:
6398         Likewise.
6399         * testsuite/experimental/net/internet/address/v6/members.cc:
6400         Likewise.
6401         * testsuite/experimental/net/internet/resolver/base.cc:
6402         Likewise.
6403         * testsuite/experimental/net/internet/resolver/ops/lookup.cc:
6404         Likewise.
6405         * testsuite/experimental/net/internet/resolver/ops/reverse.cc:
6406         Likewise.
6407         * testsuite/experimental/net/internet/socket/opt.cc:
6408         Likewise.
6409         * testsuite/experimental/net/internet/tcp.cc:
6410         Likewise.
6411         * testsuite/experimental/net/internet/udp.cc:
6412         Likewise.
6413         * testsuite/lib/libstdc++.exp (check_effective_target_net_ts_ip):
6414         New proc to check net_ts_ip et.
6415
6416 2021-04-28  Jonathan Wakely  <jwakely@redhat.com>
6417
6418         PR libstdc++/97930
6419         * testsuite/20_util/pair/requirements/structural.cc: New test.
6420
6421 2021-04-28  Jonathan Wakely  <jwakely@redhat.com>
6422
6423         * include/bits/stl_pair.h (pair) [__cplusplus > 202002]: Add
6424         new definitions for constructors and assignment operators using
6425         concepts for constraints.
6426         * testsuite/20_util/pair/cons/99957.cc: Disable for C++20 and
6427         later.
6428         * testsuite/20_util/pair/cons/explicit_construct.cc: Adjust
6429         expected error messages to also match C++20 errors.
6430
6431 2021-04-28  Jonathan Wakely  <jwakely@redhat.com>
6432
6433         PR libstdc++/99957
6434         * include/bits/stl_pair.h (_PCC::_MoveCopyPair, _PCC::_CopyMovePair):
6435         Combine and replace with ...
6436         (_PCC::_DeprConsPair): New SFINAE helper function.
6437         (pair): Merge preprocessor blocks so that all C++03 members
6438         are defined together at the end.
6439         (pair::pair(const _T1&, _U2&&), pair::pair(_U1&&, const _T2&)):
6440         Replace _T1 and _T2 parameters with __null_ptr_constant and
6441         adjust constraints.
6442         * testsuite/20_util/pair/40925.cc: Use nullptr instead of 0.
6443         * testsuite/20_util/pair/cons/explicit_construct.cc: Likewise.
6444         * testsuite/20_util/pair/cons/99957.cc: New test.
6445
6446 2021-04-28  Jonathan Wakely  <jwakely@redhat.com>
6447
6448         * include/bits/basic_string.h (__cpp_lib_constexpr_string): Define.
6449         * include/std/version (__cpp_lib_constexpr_string): Define.
6450         * testsuite/21_strings/char_traits/requirements/constexpr_functions_c++17.cc:
6451         Check for __cpp_lib_constexpr_string.
6452         * testsuite/21_strings/char_traits/requirements/constexpr_functions_c++20.cc:
6453         Likewise.
6454         * testsuite/21_strings/char_traits/requirements/version.cc: New test.
6455
6456 2021-04-28  Jonathan Wakely  <jwakely@redhat.com>
6457
6458         * doc/Makefile.am (stamp-pdf-doxygen): Improve comment about
6459         dealing with errors. Use '@' to prevent shell command being
6460         echoed.
6461         * doc/Makefile.in: Regenerate.
6462
6463 2021-04-28  Jonathan Wakely  <jwakely@redhat.com>
6464
6465         PR libstdc++/100298
6466         * include/bits/std_thread.h (thread::hardware_concurrency): Add
6467         missing noexcept to inline definition for non-gthreads targets.
6468
6469 2021-04-28  Patrick Palka  <ppalka@redhat.com>
6470
6471         PR libstdc++/100187
6472         PR libstdc++/100237
6473         PR libstdc++/100249
6474         PR libstdc++/100287
6475         * include/bits/ranges_algo.h (__search_n_fn::operator()): Give
6476         the __value_comp lambda an explicit bool return type.
6477         (__is_permutation_fn::operator()): Give the __proj_scan local
6478         variable auto&& return type.  Give the __comp_scan lambda an
6479         explicit bool return type.
6480         (__remove_fn::operator()): Give the __pred lambda an explicit
6481         bool return type.
6482         (__partition_fn::operator()): Don't std::move __first twice
6483         when returning an empty subrange.
6484         (__min_fn::operator()): Don't std::move __comp.
6485         (__max_fn::operator()): Likewise.
6486         (__minmax_fn::operator()): Likewise.
6487
6488 2021-04-27  Patrick Palka  <ppalka@redhat.com>
6489
6490         PR libstdc++/100290
6491         * include/std/ranges (join_view::_Iterator::operator++): Correct
6492         the return type of the lambda to avoid returning a copy of
6493         _M_parent->_M_inner.
6494         * testsuite/std/ranges/adaptors/join.cc (test10): New test.
6495
6496 2021-04-27  Jakub Jelinek  <jakub@redhat.com>
6497
6498         Revert:
6499         2021-04-22  Jakub Jelinek  <jakub@redhat.com>
6500
6501         PR target/100182
6502         * testsuite/29_atomics/atomic_float/1.cc: Add dg-xfail-run-if for
6503         ia32.
6504         * testsuite/29_atomics/atomic_float/wait_notify.cc: Add dg-skip-if for
6505         ia32.
6506
6507 2021-04-27  Jonathan Wakely  <jwakely@redhat.com>
6508
6509         * include/experimental/internet (address_v6::bytes_type): Adjust
6510         formatting.
6511         (basic_endpoint): Define _M_is_v6() to put all checks for
6512         AF_INET6 in one place.
6513         (basic_endpoint::resize): Simplify.
6514         (operator==(const tcp&, const tcp&)): Add constexpr and noexcept.
6515         (operator!=(const tcp&, const tcp&)): Likewise.
6516         (operator==(const udp&, const udp&)): Likewise.
6517         (operator!=(const udp&, const udp&)): Likewise.
6518         * testsuite/experimental/net/internet/tcp.cc: New test.
6519         * testsuite/experimental/net/internet/udp.cc: New test.
6520
6521 2021-04-27  Jonathan Wakely  <jwakely@redhat.com>
6522
6523         PR libstdc++/100286
6524         * include/experimental/internet (resolver_errc, resolver_category())
6525         (make_error_code, make_error_condition): Define unconditionally,
6526         only make enumerators and use of gai_strerror depend on the
6527         availability of <netdb.h>.
6528         (address_v4::to_string): Use correct constant for string length.
6529         (address_v4::to_string, address_v6::to_string): Define
6530         unconditionally, throw if unsupported.
6531         (make_address_v4, make_address_v6): Define unconditionally.
6532         Return an error if unsupported.
6533         (tcp, udp, v6_only, unicast::hops, multicast::*): Define
6534         conditionally,
6535         * testsuite/experimental/net/internet/socket/opt.cc: Check for
6536         <netinet/in.h> and <netinet/tcp.h> before using types from
6537         namespace net::ip.
6538
6539 2021-04-27  Jonathan Wakely  <jwakely@redhat.com>
6540
6541         PR libstdc++/100285
6542         * include/experimental/internet (resolver_base::flags):
6543         Define overloaded operators as hidden friends.
6544         * include/experimental/socket (socket_base::message_flags):
6545         Likewise.
6546
6547 2021-04-26  Jonathan Wakely  <jwakely@redhat.com>
6548
6549         * include/experimental/internet (tcp::no_delay, v6_only)
6550         (unicast::hops, multicast::hops, multicast::enable_loopback):
6551         Change access of base class and static data members. Add
6552         using-declaration for __socket_crtp::operator=(_Tp).
6553         (multicast::__mcastopt): New type.
6554         (multicast::join_group, multicast::leave_group): Derive from
6555         __mcastopt for common implementation.
6556         * include/experimental/socket: Add comment.
6557         * testsuite/experimental/net/internet/socket/opt.cc: New test.
6558         * testsuite/experimental/net/socket/socket_base.cc: Check for
6559         protected constructor/destructor of socket_base. Check for
6560         explicit constructors of socket option classes.
6561
6562 2021-04-26  Jonathan Wakely  <jwakely@redhat.com>
6563
6564         * include/experimental/bits/net.h (__socket_base): Add
6565         bool template parameter to allow BooleanSocketOption and
6566         IntegerSocketOption to have different __socket_base<int>
6567         base classes.
6568         (__socket_base<bool>): Adjust base class.
6569         (__socket_base<int>): Add partial specialization.
6570         (__socket_crtp::operator=(_Tp)): Add noexcept-specifier.
6571         * include/experimental/socket (socket_base::broadcast)
6572         (socket_base::debug, socket_base::do_not_route)
6573         (socket_base::keep_alive, socket_base::linger)
6574         (socket_base::out_of_band_inline)
6575         (socket_base::receive_buffer_size)
6576         (socket_base::receive_low_watermark)
6577         (socket_base::reuse_address, socket_base::send_buffer_size)
6578         (socket_base::send_low_watermark): Add using-declaration for
6579         __socket_crtp::operator=(_Tp).
6580         * testsuite/experimental/net/socket/socket_base.cc: Check
6581         properties of socket option types.
6582
6583 2021-04-26  Jonathan Wakely  <jwakely@redhat.com>
6584
6585         * include/experimental/internet (resolver_base::flags): Remove
6586         enumerators. Initialize constants directly with desired values.
6587         Make all operators constexpr and noexcept.
6588         * testsuite/experimental/net/internet/resolver/base.cc: Use
6589         __gnu_test::test_bitmask_values for bitmask type. Check
6590         construction and destruction is protected.
6591
6592 2021-04-26  Jonathan Wakely  <jwakely@redhat.com>
6593
6594         * include/bits/semaphore_base.h: Include <exception> and <errno.h>.
6595
6596 2021-04-26  Jonathan Wakely  <jwakely@redhat.com>
6597
6598         PR libstdc++/100259
6599         * include/experimental/internet (net::ip::make_error_code)
6600         (net::ip::make_error_condition, net::ip::make_network_v4)
6601         (net::ip::operator==(const udp&, const udp&)): Add 'inline'.
6602
6603 2021-04-24  David Edelsohn  <dje.gcc@gmail.com>
6604
6605         * testsuite/lib/dg-options.exp (atomic_link_flags): New.
6606         (add_options_for_libatomic): Use atomic_link_flags.
6607
6608 2021-04-23  Jonathan Wakely  <jwakely@redhat.com>
6609
6610         PR libstdc++/100180
6611         * include/experimental/io_context (io_context): Define
6612         dummy_pollfd type so that most member functions still compile
6613         without <poll.h> and struct pollfd.
6614
6615 2021-04-23  Jonathan Wakely  <jwakely@redhat.com>
6616
6617         * include/experimental/io_context (io_context::async_wait): Add
6618         comment.
6619         * include/experimental/socket (basic_socket::async_connect):
6620         Cast wait_type constant to int.
6621         (basic_datagram_socket::async_receive): Likewise.
6622         (basic_datagram_socket::async_receive_from): Likewise.
6623         (basic_datagram_socket::async_send): Likewise.
6624         (basic_datagram_socket::async_send_to): Likewise.
6625         (basic_stream_socket::async_receive): Likewise.
6626         (basic_stream_socket::async_send): Likewise. Use io_context
6627         parameter directly, instead of via an executor.
6628         (basic_socket_acceptor::async_accept): Likewise.
6629
6630 2021-04-23  Jonathan Wakely  <jwakely@redhat.com>
6631
6632         * include/experimental/socket (socket_base::shutdown_type):
6633         (socket_base::wait_type, socket_base::message_flags):
6634         Remove enumerators. Initialize constants directly with desired
6635         values.
6636         (socket_base::message_flags): Make all operators constexpr and
6637         noexcept.
6638         * testsuite/util/testsuite_common_types.h (test_bitmask_values):
6639         New test utility.
6640         * testsuite/experimental/net/socket/socket_base.cc: New test.
6641
6642 2021-04-22  David Edelsohn  <dje.gcc@gmail.com>
6643
6644         * config/os/aix/atomicity.h: Delete.
6645
6646 2021-04-22  Jonathan Wakely  <jwakely@redhat.com>
6647
6648         * include/bits/atomic_timed_wait.h (__cond_wait_until_impl):
6649         Handle system_clock as well as steady_clock.
6650         * testsuite/30_threads/semaphore/try_acquire_for.cc: Re-enable.
6651         * testsuite/30_threads/semaphore/try_acquire_until.cc:
6652         Re-enable.
6653
6654 2021-04-22  Jonathan Wakely  <jwakely@redhat.com>
6655
6656         * testsuite/30_threads/semaphore/try_acquire_posix.cc: Add
6657         options for libatomic.
6658
6659 2021-04-22  Jonathan Wakely  <jwakely@redhat.com>
6660
6661         * config/os/gnu-linux/os_defines.h: Fix type in comment.
6662
6663 2021-04-22  Jonathan Wakely  <jwakely@redhat.com>
6664
6665         PR libstdc++/99006
6666         * include/bits/shared_ptr.h (allocate_shared): Assert that _Tp
6667         is not an array type.
6668         * include/bits/shared_ptr_base.h (__allocate_shared): Likewise.
6669         * testsuite/20_util/shared_ptr/creation/99006.cc: New test.
6670
6671 2021-04-22  Thomas Rodgers  <rodgert@twrodgers.com>
6672
6673         * include/bits/atomic_wait.h: Always notify waiters in the
6674         case of 'bare' address notification.
6675
6676 2021-04-22  Jakub Jelinek  <jakub@redhat.com>
6677
6678         PR target/100182
6679         * testsuite/29_atomics/atomic_float/1.cc: Add dg-xfail-run-if for
6680         ia32.
6681         * testsuite/29_atomics/atomic_float/wait_notify.cc: Add dg-skip-if for
6682         ia32.
6683
6684 2021-04-22  Jonathan Wakely  <jwakely@redhat.com>
6685
6686         PR libstdc++/100179
6687         * include/bits/semaphore_base.h: Remove #error.
6688         * include/std/semaphore: Do not define anything unless one of
6689         the implementations is available.
6690
6691 2021-04-21  Thomas Rodgers  <rodgert@twrodgers.com>
6692
6693         * include/bits/semaphore_base.h: Always reload __old in
6694         __atomic_semaphore::_S_do_try_acquire().
6695         * testsuite/30_threads/stop_token/stop_callback/destroy.cc:
6696         re-enable testcase.
6697
6698 2021-04-21  Philippe Blain  <levraiphilippeblain@gmail.com>
6699             Jonathan Wakely  <jwakely@redhat.com>
6700
6701         PR libstdc++/99453
6702         * python/Makefile.am: Install libstdc++*-gdb.py more robustly.
6703         * python/Makefile.in: Regenerate.
6704
6705 2021-04-21  Thomas Rodgers  <rodgert@twrodgers.com>
6706
6707         * include/bits/semaphore_base.h: Add missing _M_try_acquire()
6708         member to __platform_wait.
6709
6710 2021-04-21  Jonathan Wakely  <jwakely@redhat.com>
6711
6712         * include/std/latch: Replace tab characters in license text.
6713         * include/std/semaphore: Likewise.
6714
6715 2021-04-21  Jakub Jelinek  <jakub@redhat.com>
6716
6717         PR libstdc++/100164
6718         * acinclude.m4: For POSIX semaphores AC_DEFINE HAVE_POSIX_SEMAPHORE
6719         rather than _GLIBCXX_HAVE_POSIX_SEMAPHORE.
6720         * configure: Regenerated.
6721         * config.h.in: Regenerated.
6722
6723 2021-04-20  Jonathan Wakely  <jwakely@redhat.com>
6724
6725         * testsuite/30_threads/semaphore/try_acquire_for.cc: Disable
6726         test for targets not using futexes for semaphores.
6727         * testsuite/30_threads/semaphore/try_acquire_until.cc: Likewise.
6728         * testsuite/30_threads/stop_token/stop_callback/destroy.cc:
6729         Disable for all targets.
6730
6731 2021-04-20  Thomas Rodgers  <trodgers@redhat.com>
6732
6733         * include/Makefile.am: Add new <bits/this_thread_sleep.h> header.
6734         * include/Makefile.in: Regenerate.
6735         * include/bits/this_thread_sleep.h: New file.
6736         * include/bits/atomic_base.h: Adjust all calls
6737         to __atomic_wait/__atomic_notify for new call signatures.
6738         * include/bits/atomic_timed_wait.h: Extensive rewrite.
6739         * include/bits/atomic_wait.h: Likewise.
6740         * include/bits/semaphore_base.h: Adjust all calls
6741         to __atomic_wait/__atomic_notify for new call signatures.
6742         * include/std/atomic: Likewise.
6743         * include/std/barrier: Likewise.
6744         * include/std/latch: Likewise.
6745         * include/std/semaphore: Likewise.
6746         * include/std/thread (this_thread::sleep_for)
6747         (this_thread::sleep_until): Move to new header.
6748         * testsuite/29_atomics/atomic/wait_notify/bool.cc: Simplify
6749         test.
6750         * testsuite/29_atomics/atomic/wait_notify/generic.cc: Likewise.
6751         * testsuite/29_atomics/atomic/wait_notify/pointers.cc: Likewise.
6752         * testsuite/29_atomics/atomic_flag/wait_notify/1.cc: Likewise.
6753         * testsuite/29_atomics/atomic_float/wait_notify.cc: Likewise.
6754         * testsuite/29_atomics/atomic_integral/wait_notify.cc: Likewise.
6755         * testsuite/29_atomics/atomic_ref/wait_notify.cc: Likewise.
6756
6757 2021-04-20  Patrick Palka  <ppalka@redhat.com>
6758
6759         PR libstdc++/95983
6760         * include/bits/stl_iterator.h (__detail::__move_iter_cat):
6761         Define.
6762         (move_iterator): Derive from the above in C++20 in order to
6763         conditionally define iterator_category as per P2259.
6764         (move_iterator::__base_cat): No longer used, so remove.
6765         (move_iterator::iterator_category): Remove in C++20.
6766         (__detail::__common_iter_use_postfix_proxy): Define.
6767         (common_iterator::_Proxy): Rename to ...
6768         (common_iterator:__arrow_proxy): ... this.
6769         (common_iterator::__postfix_proxy): Define as per P2259.
6770         (common_iterator::operator->): Adjust.
6771         (common_iterator::operator++): Adjust as per P2259.
6772         (iterator_traits<common_iterator>::_S_iter_cat): Define.
6773         (iterator_traits<common_iterator>::iterator_category): Change as
6774         per P2259.
6775         (__detail::__counted_iter_value_type): Define.
6776         (__detail::__counted_iter_concept): Define.
6777         (__detail::__counted_iter_cat): Define.
6778         (counted_iterator): Derive from the above three classes in order
6779         to conditionally define value_type, iterator_concept and
6780         iterator category respectively as per P2259.
6781         (counted_iterator::operator->): Define as per P2259.
6782         (incrementable_traits<counted_iterator>): Remove as per P2259.
6783         (iterator_traits<counted_iterator>): Adjust as per P2259.
6784         * include/std/ranges (__detail::__iota_view_iter_cat): Define.
6785         (iota_view::_Iterator): Derive from the above in order to
6786         conditionally define iterator_category as per P2259.
6787         (iota_view::_S_iter_cat): Rename to ...
6788         (iota_view::_S_iter_concept): ... this.
6789         (iota_view::iterator_concept): Use it to apply LWG 3291 changes.
6790         (iota_view::iterator_category): Remove.
6791         (__detail::__filter_view_iter_cat): Define.
6792         (filter_view::_Iterator): Derive from the above in order to
6793         conditionally define iterator_category as per P2259.
6794         (filter_view::_Iterator): Move to struct __filter_view_iter_cat.
6795         (filter_view::_Iterator::iterator_category): Remove.
6796         (transform_view::_Base): Define.
6797         (transform_view::__iter_cat): Define.
6798         (transform_view::_Iterator): Derive from the above in order to
6799         conditionally define iterator_category as per P2259.
6800         (transform_view::_Iterator::_Base): Just alias
6801         transform_view::_Base.
6802         (transform_view::_Iterator::_S_iter_cat): Move to struct
6803         transform_view::__iter_cat.
6804         (transform_view::_Iterator::iterator_category): Remove.
6805         (transform_view::_Sentinel::_Base): Just alias
6806         transform_view::_Base.
6807         (join_view::_Base): Define.
6808         (join_view::_Outer_iter): Define.
6809         (join_view::_Inner_iter): Define.
6810         (join_view::_S_ref_is_glvalue): Define.
6811         (join_view::__iter_cat): Define.
6812         (join_view::_Iterator): Derive from it in order to conditionally
6813         define iterator_category as per P2259.
6814         (join_view::_Iterator::_Base): Just alias join_view::_Base.
6815         (join_view::_Iterator::_S_ref_is_glvalue): Just alias
6816         join_view::_S_ref_is_glvalue.
6817         (join_view::_Iterator::_S_iter_cat): Move to struct
6818         transform_view::__iter_cat.
6819         (join_view::_Iterator::_Outer_iter): Just alias
6820         join_view::_Outer_iter.
6821         (join_view::_Iterator::_Inner_iter): Just alias
6822         join_view::_Inner_iter.
6823         (join_view::_Iterator::iterator_category): Remove.
6824         (join_view::_Sentinel::_Base): Just alias join_view::_Base.
6825         (__detail::__split_view_outer_iter_cat): Define.
6826         (__detail::__split_view_inner_iter_cat): Define.
6827         (split_view::_Base): Define.
6828         (split_view::_Outer_iter): Derive from __split_view_outer_iter_cat
6829         in order to conditionally define iterator_category as per P2259.
6830         (split_view::_Outer_iter::iterator_category): Remove.
6831         (split_view::_Inner_iter): Derive from __split_view_inner_iter_cat
6832         in order to conditionally define iterator_category as per P2259.
6833         (split_view::_Inner_iter::_S_iter_cat): Move to
6834         __split_view_inner_iter_cat.
6835         (split_view::_Inner_iter::iterator_category): Remove.
6836         (elements_view::_Base): Define.
6837         (elements_view::__iter_cat): Define.
6838         (elements_view::_Iterator): Derive from the above in order to
6839         conditionall define iterator_category as per P2259.
6840         (elements_view::_Iterator::_Base): Just alias
6841         elements_view::_Base.
6842         (elements_view::_Iterator::_S_iter_concept)
6843         (elements_view::_Iterator::iterator_concept): Define as per
6844         P2259.
6845         (elements_view::_Iterator::iterator_category): Remove.
6846         (elements_view::_Sentinel::_Base): Just alias
6847         elements_view::_Base.
6848         * testsuite/24_iterators/headers/iterator/synopsis_c++20.cc:
6849         Adjust constraints on iterator_traits<counted_iterator>.
6850         * testsuite/std/ranges/p2259.cc: New test.
6851
6852 2021-04-20  Jonathan Wakely  <jwakely@redhat.com>
6853
6854         PR libstdc++/100146
6855         * include/std/charconv (__cpp_lib_to_chars): Define
6856         conditionally.
6857         * include/std/version (__cpp_lib_to_chars): Likewise..
6858         * testsuite/20_util/from_chars/4.cc: Only check feature test
6859         macro, not _GLIBCXX_HAVE_USELOCALE.
6860         * testsuite/20_util/from_chars/5.cc: Likewise.
6861         * testsuite/20_util/from_chars/6.cc: Likewise.
6862         * testsuite/20_util/to_chars/long_double.cc: Likewise.
6863
6864 2021-04-20  Jakub Jelinek  <jakub@redhat.com>
6865
6866         * testsuite/util/testsuite_abi.cc (compare_symbols): If any symbol
6867         versions with _IEEE128_ substring are found, set ieee_version_found
6868         to true.  Ignore missing symbols with _IEEE128_ in version name if
6869         !ieee_version_found.  Use i->first as version_name instead of
6870         i->second.version_name if the latter is empty.
6871         * config/abi/post/powerpc64-linux-gnu/baseline_symbols.txt: Update.
6872
6873 2021-04-19  H.J. Lu  <hjl.tools@gmail.com>
6874
6875         * config/abi/post/x86_64-linux-gnu/x32/baseline_symbols.txt:
6876         Updated.
6877
6878 2021-04-17  Jakub Jelinek  <jakub@redhat.com>
6879
6880         * config/abi/post/powerpc-linux-gnu/baseline_symbols.txt: Update.
6881         * config/abi/post/powerpc64-linux-gnu/32/baseline_symbols.txt: Update.
6882
6883 2021-04-17  Jakub Jelinek  <jakub@redhat.com>
6884
6885         * config/abi/post/x86_64-linux-gnu/baseline_symbols.txt: Update.
6886         * config/abi/post/x86_64-linux-gnu/32/baseline_symbols.txt: Update.
6887         * config/abi/post/i386-linux-gnu/baseline_symbols.txt: Update.
6888         * config/abi/post/i486-linux-gnu/baseline_symbols.txt: Update.
6889         * config/abi/post/s390x-linux-gnu/baseline_symbols.txt: Update.
6890         * config/abi/post/powerpc64-linux-gnu/baseline_symbols.txt: Update.
6891
6892 2021-04-15  Jonathan Wakely  <jwakely@redhat.com>
6893
6894         * testsuite/lib/dg-options.exp (add_options_for_libatomic): Also
6895         add libatomic options for 32-bit sparc*-*-linux-gnu.
6896
6897 2021-04-15  Jonathan Wakely  <jwakely@redhat.com>
6898
6899         PR libstdc++/96657
6900         * libsupc++/Makefile.am: Add atomicity.cc here.
6901         * src/c++98/Makefile.am: Remove it from here.
6902         * libsupc++/Makefile.in: Regenerate.
6903         * src/c++98/Makefile.in: Regenerate.
6904         * testsuite/18_support/exception_ptr/96657.cc: New test.
6905
6906 2021-04-13  Jonathan Wakely  <jwakely@redhat.com>
6907
6908         PR libstdc++/100060
6909         * include/std/bit: Only include <ext/numeric_traits.h> for
6910         hosted build, use <limits> otherwise.
6911
6912 2021-04-13  Jonathan Wakely  <jwakely@redhat.com>
6913
6914         * doc/xml/manual/backwards_compatibility.xml: Remove porting
6915         notes for libg++ and libstdc++-v2, and bibliography.
6916         * doc/html/*: Regenerated.
6917
6918 2021-04-12  Jonathan Wakely  <jwakely@redhat.com>
6919
6920         PR libstdc++/100044
6921         * include/bits/ranges_util.h (__detail::__iterator_sentinel_pair):
6922         Remove helper concept.
6923         (subrange(_Pr), subrange(Pr, __make_unsigned_like<...>)): Remove
6924         deduction guides, as per LWG 3404.
6925         * testsuite/std/ranges/subrange/lwg3282_neg.cc: Check that class
6926         template argument deduction fails.
6927
6928 2021-04-12  Jonathan Wakely  <jwakely@redhat.com>
6929
6930         * testsuite/26_numerics/random/linear_congruential_engine/requirements/non_uint_neg.cc:
6931         Adjust expected error for C++20 mode.
6932         * testsuite/tr1/5_numerical_facilities/random/linear_congruential/requirements/non_uint_neg.cc:
6933         Likewise.
6934
6935 2021-04-12  Jonathan Wakely  <jwakely@redhat.com>
6936
6937         PR libstdc++/99995
6938         * testsuite/17_intro/headers/c++1998/49745.cc: Include all
6939         standard headers and XFAIL for effective-target c++20.
6940
6941 2021-04-09  François Dumont  <fdumont@gcc.gnu.org>
6942
6943         PR libstdc++/99402
6944         * include/debug/helper_functions.h (__can_advance(_InputIterator,
6945         const std::pair<_Diff, _Distance_precision>&, int)): New.
6946         (__can_advance(const _Safe_iterator<>&,
6947         const std::pair<_Diff, _Distance_precision>&, int)): New.
6948         * include/debug/macros.h (__glibcxx_check_can_increment_dist): New,
6949         use latter.
6950         (__glibcxx_check_can_increment_range): Adapt to use latter.
6951         (__glibcxx_check_can_decrement_range): Likewise.
6952         * include/debug/safe_iterator.h
6953         (_Safe_iterator<>::_M_can_advance(const std::pair<_Diff, _Distance_precision>&,
6954         int)): New.
6955         (__can_advance(const _Safe_iterator<>&,
6956         const std::pair<_Diff, _Distance_precision>&, int)): New.
6957         * include/debug/safe_iterator.tcc
6958         (_Safe_iterator<>::_M_can_advance(const std::pair<_Diff, _Distance_precision>&,
6959         int)): New.
6960         (_Safe_iterator<>::_M_valid_range(const _Safe_iterator<>&,
6961         std::pair<difference_type, _Distance_precision>&, bool)): Adapt for
6962         __dp_sign_max_size.
6963         (__copy_move_a): Adapt to use __glibcxx_check_can_increment_dist.
6964         (__copy_move_backward_a): Likewise.
6965         (__equal_aux): Likewise.
6966         * include/debug/stl_iterator.h (__can_advance(const std::reverse_iterator<>&,
6967         const std::pair<_Diff, _Distance_precision>&, int)): New.
6968         (__can_advance(const std::move_iterator<>&,
6969         const std::pair<_Diff, _Distance_precision>&, int)): New.
6970         * testsuite/25_algorithms/copy/debug/99402.cc: New test.
6971
6972 2021-04-09  Jonathan Wakely  <jwakely@redhat.com>
6973
6974         PR libstdc++/99985
6975         * include/bits/hashtable.h (_Hashtable::_S_nothrow_move()): Fix
6976         to be a valid constexpr function in C++11.
6977         * testsuite/23_containers/unordered_set/cons/99985.cc: New test.
6978
6979 2021-04-09  Jonathan Wakely  <jwakely@redhat.com>
6980
6981         * include/bits/fs_fwd.h: Fix doxygen group command.
6982         * include/bits/streambuf_iterator.h: Likewise.
6983         * include/bits/uses_allocator_args.h: Likewise.
6984         * include/std/memory: Likewise.
6985         * include/tr1/complex: Likewise.
6986
6987 2021-04-08  Jonathan Wakely  <jwakely@redhat.com>
6988
6989         * include/bits/basic_string.h: Tweak doxygen comment.
6990
6991 2021-04-08  Patrick Palka  <ppalka@redhat.com>
6992
6993         * include/std/ranges (__detail::find): Define.
6994         (split_view::_OuterIter::operator++): Apply proposed resolution
6995         of LWG 3505.
6996         * testsuite/std/ranges/adaptors/split.cc (test10): New test.
6997
6998 2021-04-08  Patrick Palka  <ppalka@redhat.com>
6999
7000         * include/std/ranges (__detail::find_if): Simplify.
7001         (__detail::find_if_not): Likewise.
7002         (__detail::min): Remove.
7003         (__detail::mismatch): Simplify.
7004         (take_view::size): Use std::min instead of __detail::min.
7005
7006 2021-04-08  Patrick Palka  <ppalka@redhat.com>
7007
7008         * include/std/ranges (__detail::__returnable_element): New
7009         concept.
7010         (elements_view): Use this concept in its constraints.  Add
7011         missing private access specifier.
7012         (elements_view::_S_get_element): Define as per LWG 3502.
7013         (elements_view::operator*, elements_view::operator[]): Use
7014         _S_get_element.
7015         (elements_view::operator++): Remove unnecessary constraint
7016         as per LWG 3492.
7017         * testsuite/std/ranges/adaptors/elements.cc (test05): New test.
7018
7019 2021-04-08  Jonathan Wakely  <jwakely@redhat.com>
7020
7021         * doc/Makefile.am (stamp-pdf-doxygen): Also grep for
7022         out-of-memory error in log file.
7023         * doc/Makefile.in: Regenerate.
7024
7025 2021-04-08  Jonathan Wakely  <jwakely@redhat.com>
7026
7027         * configure: Regenerate.
7028
7029 2021-04-08  Jonathan Wakely  <jwakely@redhat.com>
7030
7031         * include/bits/random.h: Fix doxygen group commands.
7032         * include/bits/regex_constants.h: Likewise.
7033         * include/tr1/random.h: Likewise.
7034
7035 2021-04-08  Jonathan Wakely  <jwakely@redhat.com>
7036
7037         * include/bits/hashtable.h (_Hashtable::_S_nothrow_move()):
7038         New function to determine noexcept-specifier for move
7039         constructors.
7040         (_Hashtable): Use _S_nothrow_move() on move constructors.
7041         * testsuite/23_containers/unordered_map/cons/noexcept_move_construct.cc:
7042         Correct static assertion message.
7043         * testsuite/23_containers/unordered_multimap/cons/noexcept_move_construct.cc:
7044         Likewise.
7045         * testsuite/23_containers/unordered_multiset/cons/noexcept_move_construct.cc:
7046         Likewise.
7047         * testsuite/23_containers/unordered_set/cons/noexcept_move_construct.cc:
7048         Likewise.
7049
7050 2021-04-08  Patrick Palka  <ppalka@redhat.com>
7051
7052         PR libstdc++/98384
7053         * testsuite/20_util/to_chars/long_double.cc: Don't run the test
7054         on targets without a large long double.  XFAIL the execution on
7055         targets with a non-conforming printf.
7056
7057 2021-04-08  Patrick Palka  <ppalka@redhat.com>
7058
7059         PR libstdc++/99433
7060         * include/std/ranges (__adaptor::__maybe_refwrap): Remove.
7061         (__adaptor::__adaptor_invocable): New concept.
7062         (__adaptor::__adaptor_partial_app_viable): New concept.
7063         (__adaptor::_RangeAdaptorClosure): Rewrite, turning it into a
7064         non-template base class.
7065         (__adaptor::_RangeAdaptor): Rewrite, turning it into a CRTP base
7066         class template.
7067         (__adaptor::_Partial): New class template that represents
7068         partial application of a range adaptor non-closure.
7069         (__adaptor::__pipe_invocable): New concept.
7070         (__adaptor::_Pipe): New class template.
7071         (__detail::__can_ref_view): New concept.
7072         (__detail::__can_subrange): New concept.
7073         (all): Replace the lambda here with ...
7074         (_All): ... this functor.  Add appropriate constraints.
7075         (__detail::__can_filter_view): New concept.
7076         (filter, _Filter): As in all/_All.
7077         (__detail::__can_transform): New concept.
7078         (transform, _Transform): As in all/_All.
7079         (__detail::__can_take_view): New concept.
7080         (take, _Take): As in all/_All.
7081         (__detail::__can_take_while_view): New concept.
7082         (take_while, _TakeWhile): As in all/_All.
7083         (__detail::__can_drop_view): New concept.
7084         (drop, _Drop): As in all/_All.
7085         (__detail::__can_drop_while_view): New concept.
7086         (drop_while, _DropWhile): As in all/_All.
7087         (__detail::__can_join_view): New concept.
7088         (join, _Join): As in all/_All.
7089         (__detail::__can_split_view): New concept.
7090         (split, _Split): As in all/_All.  Rename template parameter
7091         _Fp to _Pattern.
7092         (__detail::__already_common): New concept.
7093         (__detail::__can_common_view): New concept.
7094         (common, _Common): As in all/_All.
7095         (__detail::__can_reverse_view): New concept.
7096         (reverse, _Reverse): As in all/_All.
7097         (__detail::__can_elements_view): New concept.
7098         (elements, _Elements): As in all/_All.
7099         (keys, values): Adjust.
7100         * testsuite/std/ranges/adaptors/99433.cc: New test.
7101         * testsuite/std/ranges/adaptors/all.cc: No longer expect that
7102         adding empty range adaptor closure objects to a pipeline doesn't
7103         increase the size of the pipeline.
7104         (test05): New test.
7105         * testsuite/std/ranges/adaptors/common.cc (test03): New test.
7106         * testsuite/std/ranges/adaptors/drop.cc (test09): New test.
7107         * testsuite/std/ranges/adaptors/drop_while.cc (test04): New test.
7108         * testsuite/std/ranges/adaptors/elements.cc (test04): New test.
7109         * testsuite/std/ranges/adaptors/filter.cc (test06): New test.
7110         * testsuite/std/ranges/adaptors/join.cc (test09): New test.
7111         * testsuite/std/ranges/adaptors/p2281.cc: New test.
7112         * testsuite/std/ranges/adaptors/reverse.cc (test07): New test.
7113         * testsuite/std/ranges/adaptors/split.cc (test01, test04):
7114         Adjust.
7115         (test09): New test.
7116         * testsuite/std/ranges/adaptors/split_neg.cc (test01): Adjust
7117         expected error message.
7118         (test02): Likewise.  Extend test.
7119         * testsuite/std/ranges/adaptors/take.cc (test06): New test.
7120         * testsuite/std/ranges/adaptors/take_while.cc (test05): New test.
7121         * testsuite/std/ranges/adaptors/transform.cc (test07, test08):
7122         New test.
7123
7124 2021-04-08  Jonathan Wakely  <jwakely@redhat.com>
7125
7126         * include/std/string_view: Adjust Doxygen @file comment.
7127
7128 2021-04-08  Jonathan Wakely  <jwakely@redhat.com>
7129
7130         * include/std/type_traits (is_scoped_enum<T>): Constrain partial
7131         specialization to not match incomplete enum types. Use a
7132         requires-expression instead of instantiating is_convertible.
7133         (is_scoped_enum<const T>): Add as workaround for PR c++/99968.
7134         * testsuite/20_util/is_scoped_enum/value.cc: Check with
7135         incomplete types and opaque-enum-declarations.
7136
7137 2021-04-07  Jonathan Wakely  <jwakely@redhat.com>
7138
7139         PR libstdc++/99805
7140         * src/c++17/fs_path.cc (path::_M_split_cmpts): Do not call
7141         non-const member on _M_pathname, to avoid copy-on-write.
7142         * testsuite/27_io/filesystem/path/decompose/parent_path.cc:
7143         Check construction from strings that might be shared.
7144
7145 2021-04-06  Jonathan Wakely  <jwakely@redhat.com>
7146
7147         * include/bits/move.h (forward, move, move_if_noexcept)
7148         (addressof): Add _GLIBCXX_NODISCARD.
7149         * include/bits/ranges_cmp.h (identity::operator()): Add
7150         nodiscard attribute.
7151         * include/c_global/cstddef (to_integer): Likewise.
7152         * include/std/bit (bit_cast): Likewise.
7153         * include/std/utility (as_const, to_underlying): Likewise.
7154
7155 2021-04-06  Jonathan Wakely  <jwakely@redhat.com>
7156
7157         * include/bits/move.h (forward): Change static_assert message
7158         to be unambiguous about what must be true.
7159         * testsuite/20_util/forward/c_neg.cc: Adjust dg-error.
7160         * testsuite/20_util/forward/f_neg.cc: Likewise.
7161
7162 2021-04-06  Jonathan Wakely  <jwakely@redhat.com>
7163
7164         * include/bits/alloc_traits.h: Use markdown for code font.
7165         * include/bits/basic_string.h: Fix @param names.
7166         * include/bits/max_size_type.h: Remove period after @file.
7167         * include/bits/regex.h: Fix duplicate @retval names, and rename.
7168         * include/ext/pb_ds/detail/priority_queue_base_dispatch.hpp: Add
7169         group open to match existing group close.
7170         * include/ext/pb_ds/priority_queue.hpp: Add blank line before group
7171         open.
7172
7173 2021-04-06  Jonathan Wakely  <jwakely@redhat.com>
7174
7175         * include/bits/atomic_base.h: Fix doxygen group close.
7176         * include/bits/basic_ios.h: Likewise.
7177         * include/bits/forward_list.h: Likewise.
7178         * include/bits/fs_dir.h: Likewise.
7179         * include/bits/fs_ops.h: Likewise.
7180         * include/bits/fs_path.h: Likewise.
7181         * include/bits/functional_hash.h: Likewise.
7182         * include/bits/gslice.h: Likewise.
7183         * include/bits/gslice_array.h: Likewise.
7184         * include/bits/hashtable_policy.h: Likewise.
7185         * include/bits/indirect_array.h: Likewise.
7186         * include/bits/locale_classes.h: Likewise.
7187         * include/bits/locale_facets.h: Likewise.
7188         * include/bits/locale_facets_nonio.h: Likewise.
7189         * include/bits/mask_array.h: Likewise.
7190         * include/bits/refwrap.h: Likewise.
7191         * include/bits/regex.h: Likewise.
7192         * include/bits/regex_automaton.h: Likewise.
7193         * include/bits/regex_compiler.h: Likewise.
7194         * include/bits/regex_constants.h: Likewise.
7195         * include/bits/regex_error.h: Likewise.
7196         * include/bits/regex_executor.h: Likewise.
7197         * include/bits/regex_scanner.h: Likewise.
7198         * include/bits/shared_ptr.h: Likewise.
7199         * include/bits/shared_ptr_atomic.h: Likewise.
7200         * include/bits/shared_ptr_base.h: Likewise.
7201         * include/bits/slice_array.h: Likewise.
7202         * include/bits/specfun.h: Likewise.
7203         * include/bits/std_function.h: Likewise.
7204         * include/bits/std_mutex.h: Likewise.
7205         * include/bits/stl_deque.h: Likewise.
7206         * include/bits/stl_iterator.h: Likewise.
7207         * include/bits/stl_iterator_base_types.h: Likewise.
7208         * include/bits/stl_map.h: Likewise.
7209         * include/bits/stl_multimap.h: Likewise.
7210         * include/bits/stl_multiset.h: Likewise.
7211         * include/bits/stl_numeric.h: Likewise.
7212         * include/bits/stl_pair.h: Likewise.
7213         * include/bits/stl_set.h: Likewise.
7214         * include/bits/stl_uninitialized.h: Likewise.
7215         * include/bits/stream_iterator.h: Likewise.
7216         * include/bits/streambuf_iterator.h: Likewise.
7217         * include/bits/unique_ptr.h: Likewise.
7218         * include/bits/unordered_map.h: Likewise.
7219         * include/bits/unordered_set.h: Likewise.
7220         * include/decimal/decimal: Likewise.
7221         * include/experimental/any: Likewise.
7222         * include/experimental/array: Likewise.
7223         * include/experimental/bits/fs_dir.h: Likewise.
7224         * include/experimental/bits/fs_fwd.h: Likewise.
7225         * include/experimental/bits/fs_ops.h: Likewise.
7226         * include/experimental/bits/fs_path.h: Likewise.
7227         * include/experimental/buffer: Likewise.
7228         * include/experimental/internet: Likewise.
7229         * include/experimental/optional: Likewise.
7230         * include/experimental/propagate_const: Likewise.
7231         * include/experimental/socket: Likewise.
7232         * include/ext/pb_ds/assoc_container.hpp: Likewise.
7233         * include/ext/pb_ds/detail/priority_queue_base_dispatch.hpp:
7234         Likewise.
7235         * include/ext/pb_ds/detail/tree_policy/node_metadata_selector.hpp: Likewise.
7236         * include/ext/pb_ds/detail/trie_policy/node_metadata_selector.hpp: Likewise.
7237         * include/ext/pb_ds/detail/types_traits.hpp: Likewise.
7238         * include/ext/pb_ds/exception.hpp: Likewise.
7239         * include/ext/pb_ds/priority_queue.hpp: Likewise.
7240         * include/ext/pb_ds/tag_and_trait.hpp: Likewise.
7241         * include/ext/random: Likewise.
7242         * include/std/any: Likewise.
7243         * include/std/atomic: Likewise.
7244         * include/std/bitset: Likewise.
7245         * include/std/chrono: Likewise.
7246         * include/std/complex: Likewise.
7247         * include/std/condition_variable: Likewise.
7248         * include/std/fstream: Likewise.
7249         * include/std/future: Likewise.
7250         * include/std/iostream: Likewise.
7251         * include/std/istream: Likewise.
7252         * include/std/mutex: Likewise.
7253         * include/std/numeric: Likewise.
7254         * include/std/ostream: Likewise.
7255         * include/std/ratio: Likewise.
7256         * include/std/shared_mutex: Likewise.
7257         * include/std/stdexcept: Likewise.
7258         * include/std/streambuf: Likewise.
7259         * include/std/system_error: Likewise.
7260         * include/std/thread: Likewise.
7261         * include/std/valarray: Likewise.
7262         * include/std/variant: Likewise.
7263         * include/tr1/cmath: Likewise.
7264         * include/tr1/regex: Likewise.
7265         * include/tr2/dynamic_bitset: Likewise.
7266         * libsupc++/atomic_lockfree_defines.h: Likewise.
7267         * libsupc++/exception: Likewise.
7268         * libsupc++/exception.h: Likewise.
7269         * libsupc++/exception_ptr.h: Likewise.
7270         * libsupc++/nested_exception.h: Likewise.
7271
7272 2021-03-31  Alexandre Oliva  <oliva@adacore.com>
7273
7274         * testsuite/30_threads/future/members/poll.cc: Use faster
7275         after-ready call in the calibration loop.
7276
7277 2021-03-29  Jonathan Wakely  <jwakely@redhat.com>
7278
7279         * doc/xml/manual/status_cxx2017.xml: Adjust link for PSTL.
7280         * doc/html/manual/status.html: Regenerate.
7281
7282 2021-03-28  François Dumont  <fdumont@gcc.gnu.org>
7283
7284         * include/debug/forward_list
7285         (forward_list(forward_list&&, const allocator_type&)): Add noexcept qualification.
7286         * include/debug/list (list(list&&, const allocator_type&)): Likewise and add
7287         call to safe container allocator aware move constructor.
7288         * include/debug/vector (vector(vector&&, const allocator_type&)):
7289         Fix noexcept qualification.
7290         * testsuite/23_containers/forward_list/cons/noexcept_move_construct.cc:
7291         Add allocator-extended move constructor noexceot qualification check.
7292         * testsuite/23_containers/list/cons/noexcept_move_construct.cc: Likewise.
7293
7294 2021-03-26  Jonathan Wakely  <jwakely@redhat.com>
7295
7296         * src/c++11/random.cc (USE_LCG): Define when a pseudo-random
7297         fallback is needed.
7298         [USE_LCG] (bad_seed, construct_lcg_at, destroy_lcg_at, __lcg):
7299         New helper functions and callback.
7300         (random_device::_M_init): Add 'prng' and 'all' enumerators.
7301         Replace switch with fallthrough with a series of 'if' statements.
7302         [USE_LCG]: Construct an lcg_type engine and use __lcg when cpuid
7303         checks fail.
7304         (random_device::_M_init_pretr1) [USE_MT19937]: Accept "prng"
7305         token.
7306         (random_device::_M_getval): Check for callback unconditionally
7307         and always pass _M_file pointer.
7308         * testsuite/26_numerics/random/random_device/85494.cc: Remove
7309         effective-target check. Use new random_device_available helper.
7310         * testsuite/26_numerics/random/random_device/94087.cc: Likewise.
7311         * testsuite/26_numerics/random/random_device/cons/default-cow.cc:
7312         Remove effective-target check.
7313         * testsuite/26_numerics/random/random_device/cons/default.cc:
7314         Likewise.
7315         * testsuite/26_numerics/random/random_device/cons/token.cc: Use
7316         new random_device_available helper. Test "prng" token.
7317         * testsuite/util/testsuite_random.h (random_device_available):
7318         New helper function.
7319
7320 2021-03-25  François Dumont  <fdumont@gcc.gnu.org>
7321
7322         * include/debug/string
7323         (basic_string(const basic_string&, const _Alloc&)): Define even if !_GLIBCXX_USE_CXX11_ABI.
7324         (basic_string(basic_string&&, const _Alloc&)): Likewise and add noexcept qualification.
7325         (basic_string<>::erase): Adapt to take __const_iterator.
7326         (basic_string(const _CharT*, const _Allocator&)): Remove assign call.
7327         (basic_string<>::insert(const_iterator, _InputIte, _InputIte)): Try to
7328         remove iterator debug layer even if !_GLIBCXX_USE_CXX11_ABI.
7329         [_GLIBCXX_USE_CHAR8_T] (__gnu_debug::u8string): New.
7330         (__gnu_debug::u16string, __gnu_debug::u32string): New.
7331         (std::hash<__gnu_debug::basic_string<>>): New partial specialization.
7332         (std::__is_fast_hash<__gnu_debug::basic_string<>>): Likewise.
7333         * testsuite/util/exception/safety.h
7334         (erase_base<__gnu_debug::basic_string<>>): New partial specialization.
7335         (insert_base<__gnu_debug::basic_string<>>): Likewise.
7336         * testsuite/util/testsuite_container_traits.h (traits<__gnu_debug::basic_string<>>):
7337         New partial specialization.
7338         * testsuite/21_strings/basic_string/hash/debug.cc: New test.
7339         * testsuite/21_strings/basic_string/requirements/citerators.cc:
7340         Add test on __gnu_debug::string.
7341         * testsuite/21_strings/basic_string/requirements/dr438/constructor.cc: Likewise.
7342         * testsuite/21_strings/basic_string/requirements/exception/basic.cc: Likewise.
7343         * testsuite/21_strings/basic_string/requirements/exception/generation_prohibited.cc:
7344         Likewise.
7345         * testsuite/21_strings/basic_string/requirements/exception/propagation_consistent.cc:
7346         Likewise.
7347         * testsuite/21_strings/basic_string/requirements/explicit_instantiation/char/1.cc:
7348         Likewise.
7349         * testsuite/21_strings/basic_string/requirements/explicit_instantiation/char16_t/1.cc:
7350         Likewise.
7351         * testsuite/21_strings/basic_string/requirements/explicit_instantiation/char32_t/1.cc:
7352         Likewise.
7353         * testsuite/21_strings/basic_string/requirements/explicit_instantiation/char8_t/1.cc:
7354         Likewise.
7355         * testsuite/21_strings/basic_string/requirements/explicit_instantiation/wchar_t/1.cc:
7356         Likewise.
7357         * testsuite/21_strings/basic_string/requirements/typedefs.cc: Likewise.
7358
7359 2021-03-25  Jakub Jelinek  <jakub@redhat.com>
7360
7361         PR c++/99672
7362         * testsuite/18_support/source_location/consteval.cc (main): Adjust
7363         expected column numbers.
7364         * testsuite/18_support/source_location/1.cc (main): Likewise.
7365
7366 2021-03-25  Jonathan Wakely  <jwakely@redhat.com>
7367
7368         * libsupc++/new_opa.cc [!_GLIBCXX_HOSTED]: Declare malloc.
7369
7370 2021-03-25  Jonathan Wakely  <jwakely@redhat.com>
7371
7372         * testsuite/util/exception/safety.h (setup_base::generate):
7373         Support seeding random engine.
7374         (erase_point, erase_range): Adjust range of random numbers to
7375         ensure dereferenceable iterators are used where required.
7376         (generation_prohibited::run): Do not try to erase from empty
7377         containers.
7378         * testsuite/util/testsuite_containergen.h (test_containers):
7379         Support seeding random engine.
7380
7381 2021-03-23  Jonathan Wakely  <jwakely@redhat.com>
7382
7383         * testsuite/std/ranges/adaptors/reverse.cc: Replace duplicated
7384         line with a check that uses the const being/end overloads.
7385
7386 2021-03-23  Moritz Sichert  <sichert@in.tum.de>
7387
7388         * include/std/ranges (reverse_view::begin, reverse_view::end):
7389         Qualify make_reverse_iterator calls to avoid ADL.
7390         * testsuite/std/ranges/adaptors/reverse.cc: Test that
7391         views::reverse works when make_reverse_iterator is defined
7392         in an associated namespace.
7393
7394 2021-03-23  Jonathan Wakely  <jwakely@redhat.com>
7395
7396         * include/bits/c++config (_GLIBCXX_LONG_DOUBLE_ALT128_COMPAT):
7397         Do not define when compiling with Clang.
7398
7399 2021-03-22  Jonathan Wakely  <jwakely@redhat.com>
7400
7401         * include/std/string_view (basic_string_view(Range&&)): Define new
7402         constructor and deduction guide.
7403         * testsuite/21_strings/basic_string_view/cons/char/range_c++20.cc: New test.
7404         * testsuite/21_strings/basic_string_view/cons/wchar_t/range_c++20.cc: New test.
7405
7406 2021-03-22  Jonathan Wakely  <jwakely@redhat.com>
7407
7408         * include/bits/range_access.h (begin(T (&)[N]), end(T (&)[N])):
7409         Add missing 'noexcept' as per LWG 2280.
7410         (rbegin(T (&)[N]), rend(T (&)[N]), rbegin(initializer_list<T>))
7411         (rend(initializer_list<T>)): Add 'noexcept' as per LWG 3537.
7412         * testsuite/24_iterators/range_access/range_access.cc: Check for
7413         expected noexcept specifiers. Check result types of generic
7414         std::begin and std::end overloads.
7415         * testsuite/24_iterators/range_access/range_access_cpp14.cc:
7416         Check for expected noexcept specifiers.
7417         * testsuite/24_iterators/range_access/range_access_cpp17.cc:
7418         Likewise.
7419
7420 2021-03-19  Jonathan Wakely  <jwakely@redhat.com>
7421
7422         * include/std/type_traits (is_scoped_enum): Define.
7423         * include/std/version (__cpp_lib_is_scoped_enum): Define.
7424         * testsuite/20_util/is_scoped_enum/value.cc: New test.
7425         * testsuite/20_util/is_scoped_enum/version.cc: New test.
7426
7427 2021-03-16  Jonathan Wakely  <jwakely@redhat.com>
7428
7429         PR libstdc++/99341
7430         * config/abi/post/aarch64-linux-gnu/baseline_symbols.txt: Remove
7431         std::once_flag symbols.
7432         * config/abi/post/ia64-linux-gnu/baseline_symbols.txt: Likewise.
7433         * config/abi/post/m68k-linux-gnu/baseline_symbols.txt: Likewise.
7434         * config/abi/post/riscv64-linux-gnu/baseline_symbols.txt:
7435         Likewise.
7436         * config/abi/pre/gnu.ver: Likewise.
7437         * src/c++11/mutex.cc [_GLIBCXX_HAVE_LINUX_FUTEX]
7438         (struct __once_flag_compat): Remove.
7439         (_ZNSt9once_flag11_M_activateEv): Remove.
7440         (_ZNSt9once_flag9_M_finishEb): Remove.
7441
7442 2021-03-16  Jonathan Wakely  <jwakely@redhat.com>
7443
7444         PR libstdc++/99341
7445         * include/std/mutex [_GLIBCXX_HAVE_LINUX_FUTEX] (once_flag):
7446         Revert to pthread_once_t implementation.
7447         [_GLIBCXX_HAVE_LINUX_FUTEX] (call_once): Likewise.
7448         * src/c++11/mutex.cc [_GLIBCXX_HAVE_LINUX_FUTEX]
7449         (struct __once_flag_compat): New type matching the reverted
7450         implementation of once_flag using futexes.
7451         (once_flag::_M_activate): Remove, replace with ...
7452         (_ZNSt9once_flag11_M_activateEv): ... alias symbol.
7453         (once_flag::_M_finish): Remove, replace with ...
7454         (_ZNSt9once_flag9_M_finishEb): ... alias symbol.
7455         * testsuite/30_threads/call_once/66146.cc: Removed.
7456
7457 2021-03-15  Iain Sandoe  <iain@sandoe.co.uk>
7458
7459         * testsuite/17_intro/names.cc: Exclude j from the list
7460         of test symbols for Darwin.
7461
7462 2021-03-15  Iain Sandoe  <iain@sandoe.co.uk>
7463
7464         * config/os/bsd/darwin/ppc-extra.ver: Add matching for
7465         to_chars and from_chars for long double.
7466
7467 2021-03-15  Patrick Palka  <ppalka@redhat.com>
7468
7469         * include/bits/max_size_type.h (__max_size_type::operator _Tp):
7470         Fix formatting.
7471         (__max_size_type::operator++): Define.
7472         (__max_size_type::operator--): Likewise.
7473         (__max_size_type::operator<=>): Conditionally define (in place
7474         of the other comparison operators).
7475         (__max_diff_type::operator _Tp): Fix formatting.
7476         (__max_diff_type::operator++): Define.
7477         (__max_diff_type::operator--): Likewise.
7478         (__max_diff_type::operator<=>): Conditionally define (in place
7479         of the other comparison operators).
7480         * testsuite/std/ranges/iota/max_size_type.cc (test01): Test
7481         these operator overloads.
7482
7483 2021-03-15  Caroline Tice  <cmtice@google.com>
7484
7485         PR libstdc++/99172
7486         * src/Makefile.am (AM_CXXFLAGS_PRE, AM_CXXFLAGS): Add
7487         AM_CXXFLAGS_PRE with the old definition of AM_CXXFLAGS; make
7488         AM_CXXFLAGS to be AM_CXXFLAGS_PRE with '-fvtable-verify=std'
7489         filtered out.
7490         * src/Makefile.in: Regenerate.
7491
7492 2021-03-11  Patrick Palka  <ppalka@redhat.com>
7493
7494         * src/c++17/floating_to_chars.cc: Simplify the file as if
7495         __SIZEOF_INT128__ is always defined.
7496         [!defined __SIZEOF_INT128__]: Include "uint128_t.h".  Define
7497         a base-10 to_chars overload for the uint128_t class type.
7498         * src/c++17/uint128_t.h: New file.
7499         * testsuite/20_util/to_chars/long_double.cc: No longer expect an
7500         execution FAIL on targets that have a large long double type
7501         but lack __int128.
7502
7503 2021-03-11  Patrick Palka  <ppalka@redhat.com>
7504
7505         * src/c++17/ryu/LOCAL_PATCHES: Update.
7506         * src/c++17/ryu/d2s_intrinsics.h: Don't define uint128_t.
7507         * src/c++17/ryu/generic_128.h: Likewise.
7508         * src/c++17/ryu/ryu_generic_128.h (struct floating_decimal_128):
7509         Use uint128_t instead of __uint128_t.
7510         (generic_binary_to_decimal): Likewise.
7511
7512 2021-03-11  Patrick Palka  <ppalka@redhat.com>
7513
7514         * src/c++17/ryu/LOCAL_PATCHES: New file.
7515
7516 2021-03-11  Patrick Palka  <ppalka@redhat.com>
7517
7518         * src/c++17/floating_to_chars.cc (uint128_t): New conditionally
7519         defined alias of unsigned __int128.
7520         (floating_type_traits_binary128::mantissa_t): Use uint128_t
7521         instead of unsigned __int128.
7522         (floating_type_traits<long double>::mantissa_t)
7523         [LONG_DOUBLE_KIND == LDK_IBM128]: Likewise.
7524         (get_ieee_repr): Likewise.  Make casts from uint_t to mantissa_t
7525         and uint32_t explicit.  Simplify the extraction of mantissa,
7526         exponent and sign bit.
7527
7528 2021-03-11  Jonathan Wakely  <jwakely@redhat.com>
7529
7530         * include/std/barrier (barrier::arrival_token): New move-only
7531         class that encapsulates the underlying token value.
7532
7533 2021-03-11  Jonathan Wakely  <jwakely@redhat.com>
7534
7535         * python/libstdcxx/v6/printers.py (find_type): Use tag attribute
7536         instead of unqualified() method.
7537
7538 2021-03-11  Jonathan Wakely  <jwakely@redhat.com>
7539
7540         PR libstdc++/99537
7541         * include/std/stop_token (_Stop_state_t::_M_release_ownership):
7542         Use acq_rel memory ordering.
7543
7544 2021-03-11  Jonathan Wakely  <jwakely@redhat.com>
7545
7546         PR libstdc++/99533
7547         * src/c++17/fs_dir.cc (recursive_directory_iterator): Use new
7548         helper function to check for permission denied errors.
7549         * src/filesystem/dir.cc (recursive_directory_iterator):
7550         Likewise.
7551         * src/filesystem/dir-common.h (is_permission_denied_error): New
7552         helper function.
7553
7554 2021-03-11  Jonathan Wakely  <jwakely@redhat.com>
7555
7556         PR libstdc++/99536
7557         * include/bits/random.h (normal_distribution): Use
7558         default-initializer for _M_saved and _M_saved_available.
7559
7560 2021-03-10  John David Anglin  <danglin@gcc.gnu.org>
7561
7562         * testsuite/29_atomics/atomic/wait_notify/bool.cc: Add options to
7563         link with libatomic.
7564         * testsuite/29_atomics/atomic/wait_notify/generic.cc: Likewise.
7565         * testsuite/29_atomics/atomic/wait_notify/pointers.cc: Likewise.
7566         * testsuite/29_atomics/atomic_flag/wait_notify/1.cc: Likewise.
7567         * testsuite/30_threads/barrier/arrive.cc: Likewise.
7568         * testsuite/30_threads/barrier/arrive_and_drop.cc: Likewise.
7569         * testsuite/30_threads/barrier/arrive_and_wait.cc: Likewise.
7570         * testsuite/30_threads/barrier/completion.cc: Likewise.
7571         * testsuite/30_threads/latch/3.cc: Likewise.
7572         * testsuite/30_threads/semaphore/try_acquire.cc: Likewise.
7573         * testsuite/30_threads/semaphore/try_acquire_for.cc: Likewise.
7574         * testsuite/30_threads/semaphore/try_acquire_until.cc: Likewise.
7575
7576 2021-03-10  Jonathan Wakely  <jwakely@redhat.com>
7577
7578         PR libstdc++/99413
7579         * include/bits/align.h: Include debug/assertions.h.
7580         * include/bits/codecvt.h: Include bits/c++config.h.
7581         * include/bits/enable_special_members.h: Likewise.
7582         * include/bits/erase_if.h: Likewise.
7583         * include/bits/functional_hash.h: Include <type_traits>.
7584         * include/bits/invoke.h: Include bits/move.h.
7585         * include/bits/ostream_insert.h: Include bits/exception_defines.h.
7586         * include/bits/parse_numbers.h: Include <type_traits>.
7587         * include/bits/predefined_ops.h: Include bits/c++config.h.
7588         * include/bits/range_access.h: Include bits/stl_iterator.h.
7589         * include/bits/stl_bvector.h: Do not include bits/stl_vector.h.
7590         * include/bits/stl_iterator.h: Include bits/stl_iterator_base_types.h.
7591         * include/bits/stl_uninitialized.h: Include bits/stl_algobase.h.
7592         * include/bits/uniform_int_dist.h: Include bits/concept_check.h.
7593         * include/bits/unique_lock.h: Include bits/std_mutex.h.
7594         * include/debug/assertions.h: Include bits/c++config.h.
7595
7596 2021-03-10  Jonathan Wakely  <jwakely@redhat.com>
7597
7598         * include/bits/ranges_cmp.h (__eq_builtin_ptr_cmp): Remove.
7599         (ranges::equal_to, ranges::not_equal_to): Do not constrain
7600         with __eq_builtin_ptr_cmp.
7601         (ranges::less, ranges::greater, ranges::less_equal)
7602         (ranges::greater_equal): Do not constrain with
7603         __less_builtin_ptr_cmp.
7604         * libsupc++/compare (compare_three_way): Do not constrain with
7605         __3way_builtin_ptr_cmp.
7606         * testsuite/18_support/comparisons/object/builtin-ptr-three-way.cc: Moved to...
7607         * testsuite/18_support/comparisons/object/lwg3530.cc: ...here.
7608         * testsuite/20_util/function_objects/range.cmp/lwg3530.cc: New test.
7609
7610 2021-03-10  Jonathan Wakely  <jwakely@redhat.com>
7611
7612         * testsuite/std/time/syn_c++20.cc: Enable synopsis checks for
7613         C++20 calendar types.
7614
7615 2021-03-06  Jakub Jelinek  <jakub@redhat.com>
7616
7617         PR libstdc++/99396
7618         * include/std/bit (__rotl, __rotr): Add optimized variants for power of
7619         two _Nd which the compiler can pattern match the rotates.
7620
7621 2021-03-04  Jonathan Wakely  <jwakely@redhat.com>
7622
7623         PR libstdc++/99382
7624         * testsuite/20_util/specialized_algorithms/uninitialized_default_n/sizes.cc:
7625         Make storage larger than required. Verify no write to the last
7626         element.
7627         * testsuite/20_util/specialized_algorithms/uninitialized_value_construct_n/sizes.cc:
7628         Likewise.
7629
7630 2021-03-03  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
7631
7632         * config/abi/post/i386-solaris/baseline_symbols.txt: Regenerate.
7633         * config/abi/post/i386-solaris/amd64/baseline_symbols.txt:
7634         Likewise.
7635         * config/abi/post/sparc-solaris/baseline_symbols.txt: Likewise.
7636         * config/abi/post/sparc-solaris/sparcv9/baseline_symbols.txt:
7637         Likewise.
7638
7639 2021-03-03  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
7640
7641         * include/experimental/bits/simd.h: Replace reserved _X, _B by
7642         _Xp, _Bp.
7643         * include/experimental/bits/simd_builtin.h: Likewise.
7644         * include/experimental/bits/simd_x86.h: Likewise.
7645
7646 2021-02-27  Jonathan Wakely  <jwakely@redhat.com>
7647
7648         PR libstdc++/99301
7649         * include/std/chrono (year_month_day::_M_days_since_epoch()):
7650         Convert chrono::month and chrono::day to unsigned before
7651         converting to uint32_t.
7652
7653 2021-02-25  Jonathan Wakely  <jwakely@redhat.com>
7654
7655         * include/std/chrono (year_month_day::_S_from_days): Perform
7656         all calculations with type uint32_t.
7657
7658 2021-02-25  Jonathan Wakely  <jwakely@redhat.com>
7659
7660         * doc/xml/manual/abi.xml: Document versioning for GCC 11.
7661         * doc/html/manual/abi.html: Regenerate.
7662
7663 2021-02-25  Jonathan Wakely  <jwakely@redhat.com>
7664
7665         PR libstdc++/99270
7666         * testsuite/27_io/headers/cstdio/types_std.cc: Use pointer to
7667         FILE instead of FILE.
7668
7669 2021-02-25  Andreas Schwab  <schwab@suse.de>
7670
7671         * config/abi/post/aarch64-linux-gnu/baseline_symbols.txt: Update.
7672         * config/abi/post/ia64-linux-gnu/baseline_symbols.txt: Update.
7673         * config/abi/post/m68k-linux-gnu/baseline_symbols.txt: Update.
7674         * config/abi/post/riscv64-linux-gnu/baseline_symbols.txt: Update.
7675
7676 2021-02-25  Jonathan Wakely  <jwakely@redhat.com>
7677
7678         PR libstdc++/99265
7679         * include/std/chrono (year_month_day::_S_from_days): Cast long
7680         to int explicitly.
7681
7682 2021-02-25  Jonathan Wakely  <jwakely@redhat.com>
7683
7684         * include/std/utility (to_underlying): Define.
7685         * include/std/version (__cpp_lib_to_underlying): Define.
7686         * testsuite/20_util/to_underlying/1.cc: New test.
7687         * testsuite/20_util/to_underlying/version.cc: New test.
7688
7689 2021-02-24  Jonathan Wakely  <jwakely@redhat.com>
7690
7691         PR libstdc++/99261
7692         * src/c++17/floating_to_chars.cc (sprintf_ld): Add extra args
7693         before value to be printed.
7694
7695 2021-02-24  Patrick Palka  <ppalka@redhat.com>
7696
7697         * src/c++17/floating_to_chars.cc (__floating_to_chars_precision):
7698         Relax the condition that guards the printf code path to accept
7699         F128_type as well as long double.
7700
7701 2021-02-24  Cassio Neri  <cassio.neri@gmail.com>
7702
7703         * include/std/chrono (year_month_day_last:day): New
7704         implementation.
7705
7706 2021-02-24  Cassio Neri  <cassio.neri@gmail.com>
7707
7708         * include/std/chrono (year::is_leap): New implementation.
7709         * testsuite/std/time/year/2.cc: New test.
7710
7711 2021-02-24  Cassio Neri  <cassio.neri@gmail.com>
7712
7713         * include/std/chrono (year_month_day::_M_days_since_epoch):
7714         New implementation.
7715         * testsuite/std/time/year_month_day/4.cc: New test.
7716
7717 2021-02-24  Cassio Neri  <cassio.neri@gmail.com>
7718
7719         * include/std/chrono (year_month_day::_S_from_days): New
7720         implementation.
7721         * testsuite/std/time/year_month_day/3.cc: New test.
7722
7723 2021-02-24  Patrick Palka  <ppalka@redhat.com>
7724
7725         PR libstdc++/98384
7726         * testsuite/20_util/to_chars/long_double.cc: Include <optional>.
7727         (test01): Simplify verifying the nearby values by using a
7728         2-iteration loop and a dedicated output buffer to check that the
7729         nearby values are different.  Factor out the printf-based
7730         verification into a local function, and check that the leading
7731         hex digits agree before comparing to the output of printf.  Also
7732         verify the output by round-tripping it through from_chars.
7733
7734 2021-02-24  Jonathan Wakely  <jwakely@redhat.com>
7735
7736         PR libstdc++/98389
7737         * config/abi/pre/gnu.ver (GLIBCXX_3.4.29): Do not match to_chars
7738         symbols for long double arguments mangled as 'g'.
7739         * config/os/gnu-linux/ldbl-extra.ver: Likewise.
7740         * config/os/gnu-linux/ldbl-ieee128-extra.ver: Likewise.
7741         * src/c++17/Makefile.am [GLIBCXX_LDBL_ALT128_COMPAT_TRUE]:
7742         Use -mabi=ibmlongdouble for floating_to_chars.cc.
7743         * src/c++17/Makefile.in: Regenerate.
7744         * src/c++17/floating_to_chars.cc (floating_type_traits_binary128):
7745         New type defining type traits of IEEE binary128 format.
7746         (floating_type_traits<__float128>): Define specialization.
7747         (floating_type_traits<long double>): Define in terms of
7748         floating_type_traits_binary128 when appropriate.
7749         (floating_to_shortest_scientific): Handle __float128.
7750         (sprintf_ld): New function template for printing a long double
7751         or __ieee128 value using sprintf.
7752         (__floating_to_chars_shortest, __floating_to_chars_precision):
7753         Use sprintf_ld.
7754         (to_chars): Define overloads for __float128.
7755
7756 2021-02-24  Jonathan Wakely  <jwakely@redhat.com>
7757
7758         * testsuite/17_intro/names.cc: Undefine 'u' on powerpc*-linux*.
7759
7760 2021-02-23  Martin Sebor  <msebor@redhat.com>
7761
7762         PR c++/99074
7763         * libsupc++/dyncast.cc (__dynamic_cast): Return null when
7764         first argument is null.
7765
7766 2021-02-23  Jakub Jelinek  <jakub@redhat.com>
7767
7768         PR libstdc++/99181
7769         * testsuite/21_strings/char_traits/requirements/char/99181.cc: New
7770         test.
7771
7772 2021-02-23  Jakub Jelinek  <jakub@redhat.com>
7773
7774         PR libstdc++/99181
7775         * include/bits/char_traits.h (char_traits<char>::compare): For
7776         constexpr evaluation don't call
7777         __gnu_cxx::char_traits<char_type>::compare but do the comparison loop
7778         directly.
7779
7780 2021-02-23  Jakub Jelinek  <jakub@redhat.com>
7781
7782         PR libstdc++/97549
7783         * include/pstl/parallel_backend_serial.h: Remove __pstl::__par_backend.
7784
7785 2021-02-23  Patrick Palka  <ppalka@redhat.com>
7786
7787         PR libstdc++/98384
7788         * src/c++17/floating_to_chars.cc (get_ieee_repr): Extract
7789         the high- and low-order parts from an IBM long double value
7790         in an endian-agnostic way.
7791
7792 2021-02-19  Jonathan Wakely  <jwakely@redhat.com>
7793
7794         * include/bits/atomic_wait.h (__thread_relax()): Call
7795         __thread_yield() not __gthread_yield().
7796
7797 2021-02-15  Jonathan Wakely  <jwakely@redhat.com>
7798
7799         * include/bits/atomic_wait.h (__thread_yield()): Check
7800         _GLIBCXX_HAS_GTHREADS before using __gthread_yield.
7801         (__thread_relax()): Use __thread_yield() instead of repeating
7802         the preprocessor checks for __gthread_yield.
7803
7804 2021-02-15  Jonathan Wakely  <jwakely@redhat.com>
7805
7806         * include/std/mutex (once_flag::_M_activate()): Add explicit
7807         return statement for passive case.
7808         (once_flag::_M_finish(bool)): Use reserved name for parameter.
7809
7810 2021-02-14  Jonathan Wakely  <jwakely@redhat.com>
7811
7812         PR libstdc++/99096
7813         * testsuite/util/testsuite_fs.h: Always include <unistd.h>.
7814
7815 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
7816
7817         PR libstdc++/88881
7818         * src/c++17/fs_ops.cc (fs::symlink_status): Re-enable workaround.
7819
7820 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
7821
7822         * doc/xml/manual/status_cxx2014.xml: Document implementation
7823         specific properties of std::experimental::filesystem::rename.
7824         * doc/xml/manual/status_cxx2017.xml: Document implementation
7825         specific properties of std::filesystem::rename.
7826         * doc/html/*: Regenerate.
7827         * src/c++17/fs_ops.cc (fs::rename): Implement correct behaviour
7828         for directories on Windows.
7829         * src/filesystem/ops-common.h (__gnu_posix::rename): Use
7830         MoveFileExW on Windows.
7831         * testsuite/27_io/filesystem/operations/rename.cc: New test.
7832         * testsuite/experimental/filesystem/operations/rename.cc: New test.
7833
7834 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
7835
7836         * testsuite/util/testsuite_fs.h (nonexistent_path): Add
7837         random number to the path.
7838
7839 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
7840
7841         * include/experimental/internet (address_v6::to_string): Include
7842         scope ID in string.
7843         * testsuite/experimental/net/internet/address/v6/members.cc:
7844         Test to_string() results.
7845
7846 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
7847
7848         * include/experimental/internet (address_v6::any): Avoid using
7849         memcpy in constexpr function.
7850         (address_v6::loopback): Likewise.
7851         (make_address_v6): Fix missing return statements on error paths.
7852         * include/experimental/io_context: Avoid -Wdangling-else
7853         warning.
7854         * testsuite/experimental/net/internet/address/v4/members.cc:
7855         Remove unused variables.
7856         * testsuite/experimental/net/internet/address/v6/members.cc:
7857         New test.
7858
7859 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
7860
7861         * include/bits/shared_ptr_base.h (__shared_ptr::_M_get_deleter):
7862         Add unused attribute to parameter.
7863         * src/c++11/shared_ptr.cc (_Sp_make_shared_tag::_S_eq):
7864         Likewise.
7865
7866 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
7867
7868         * testsuite/27_io/basic_ostream/emit/1.cc: Expect test to fail
7869         if -fno-rtti is used.
7870         * testsuite/30_threads/async/forced_unwind.cc: Expect test
7871         to abort if -fno-rtti is used.
7872
7873 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
7874
7875         * testsuite/util/testsuite_allocator.h (memory_resource):
7876         Remove requirement for RTTI and exceptions to be enabled.
7877
7878 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
7879
7880         * testsuite/27_io/basic_istringstream/rdbuf/char/2832.cc: Use
7881         static_cast when RTTI is disabled.
7882         * testsuite/27_io/basic_istringstream/rdbuf/wchar_t/2832.cc:
7883         Likewise.
7884         * testsuite/27_io/basic_ostringstream/rdbuf/char/2832.cc:
7885         Likewise.
7886         * testsuite/27_io/basic_ostringstream/rdbuf/wchar_t/2832.cc:
7887         Likewise.
7888         * testsuite/27_io/basic_stringstream/str/char/2.cc:
7889         Likewise.
7890         * testsuite/27_io/basic_stringstream/str/wchar_t/2.cc:
7891         Likewise.
7892
7893 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
7894
7895         * include/std/ostream (__syncbuf_base::_S_get): Mark parameter
7896         as unused and only use dynamic_cast when RTTI is enabled.
7897
7898 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
7899
7900         PR libstdc++/99077
7901         * src/c++11/cxx11-ios_failure.cc (__ios_failure(const char*, int)):
7902         Change int parameter to error_code, to match std::ios_failure.
7903         (__throw_ios_failure(const char*, int)): Construct error_code
7904         from int parameter.
7905
7906 2021-02-11  Jonathan Wakely  <jwakely@redhat.com>
7907
7908         * libsupc++/eh_ptr.cc (_GLIBCXX_EH_PTR_RELOPS_COMPAT): Define
7909         new macro.
7910         * libsupc++/exception_ptr.h (_GLIBCXX_EH_PTR_USED): Check new
7911         macro instead of _GLIBCXX_EH_PTR_COMPAT.
7912         (operator==): Likewise.
7913
7914 2021-02-11  Jonathan Wakely  <jwakely@redhat.com>
7915
7916         PR libstdc++/99058
7917         * doc/xml/manual/status_cxx2011.xml: Document when support
7918         became stable.
7919         * doc/xml/manual/status_cxx2014.xml: Likewise.
7920         * doc/xml/manual/status_cxx2017.xml: Likewise.
7921         * doc/html/manual/status.html: Regenerate.
7922
7923 2021-02-10  Jonathan Wakely  <jwakely@redhat.com>
7924
7925         PR libstdc++/88881
7926         * src/c++17/fs_ops.cc (fs::status): Re-enable workaround.
7927
7928 2021-02-10  Jonathan Wakely  <jwakely@redhat.com>
7929
7930         * src/c++17/fs_ops.cc (fs::create_hard_link, fs::equivalent)
7931         (fs::remove): Use std::system_category() for error codes from
7932         GetLastError().
7933         * src/filesystem/ops.cc (fs::create_hard_link, fs::remove):
7934         Likewise.
7935
7936 2021-02-10  Jonathan Wakely  <jwakely@redhat.com>
7937
7938         * testsuite/27_io/filesystem/operations/proximate.cc: Fix typo
7939         in __MINGW32__ macro name.
7940         * testsuite/27_io/filesystem/path/compare/lwg2936.cc: Likewise.
7941         * testsuite/27_io/filesystem/path/generation/proximate.cc:
7942         Likewise.
7943         * testsuite/27_io/filesystem/path/generation/relative.cc:
7944         Likewise.
7945         * testsuite/util/testsuite_fs.h: Likewise.
7946
7947 2021-02-09  François Dumont  <fdumont@gcc.gnu.org>
7948
7949         * include/bits/stl_tree.h
7950         (__has_is_transparent, __has_is_transparent_t): Move...
7951         * include/bits/stl_function.h: ...here.
7952         * include/bits/hashtable_policy.h (_Hash_code_base<>::_M_hash_code_tr): New..
7953         (_Hashtable_base<>::_M_equals_tr): New.
7954         * include/bits/hashtable.h (_Hashtable<>::_M_find_tr, _Hashtable<>::_M_count_tr,
7955         _Hashtable<>::_M_equal_range_tr): New member function templates to perform
7956         heterogeneous lookup.
7957         (_Hashtable<>::_M_find_before_node_tr): New.
7958         (_Hashtable<>::_M_find_node_tr): New.
7959         * include/bits/unordered_map.h (unordered_map::find<>, unordered_map::count<>,
7960         unordered_map::contains<>, unordered_map::equal_range<>): New member function
7961         templates to perform heterogeneous lookup.
7962         (unordered_multimap::find<>, unordered_multimap::count<>,
7963         unordered_multimap::contains<>, unordered_multimap::equal_range<>): Likewise.
7964         * include/bits/unordered_set.h  (unordered_set::find<>, unordered_set::count<>,
7965         unordered_set::contains<>, unordered_set::equal_range<>): Likewise.
7966         (unordered_multiset::find<>, unordered_multiset::count<>,
7967         unordered_multiset::contains<>, unordered_multiset::equal_range<>): Likewise.
7968         * include/debug/unordered_map
7969         (unordered_map::find<>, unordered_map::equal_range<>): Likewise.
7970         (unordered_multimap::find<>, unordered_multimap::equal_range<>): Likewise.
7971         * include/debug/unordered_set
7972         (unordered_set::find<>, unordered_set::equal_range<>): Likewise.
7973         (unordered_multiset::find<>, unordered_multiset::equal_range<>): Likewise.
7974         * testsuite/23_containers/unordered_map/operations/1.cc: New test.
7975         * testsuite/23_containers/unordered_multimap/operations/1.cc: New test.
7976         * testsuite/23_containers/unordered_multiset/operations/1.cc: New test.
7977         * testsuite/23_containers/unordered_set/operations/1.cc: New test.
7978
7979 2021-02-09  François Dumont  <fdumont@gcc.gnu.org>
7980
7981         * include/bits/stl_deque.h
7982         (std::operator-(deque::iterator, deque::iterator)): Replace if/then with
7983         a null pointer test.
7984
7985 2021-02-09  Jonathan Wakely  <jwakely@redhat.com>
7986
7987         * testsuite/27_io/filesystem/operations/remove_all.cc: Remove
7988         test directory after making it writable again.
7989         * testsuite/experimental/filesystem/operations/remove_all.cc:
7990         Likewise.
7991
7992 2021-02-09  Jonathan Wakely  <jwakely@redhat.com>
7993
7994         PR libstdc++/99021
7995         * include/std/coroutine (coroutine_handle<P>::from_address): Add
7996         noexcept.
7997
7998 2021-02-09  Vladimir Vishnevsky  <vv.os.swe@gmail.com>
7999
8000         * include/ext/stdio_sync_filebuf.h: Remove unused <unistd.h>.
8001         * src/c++17/fs_ops.cc (fs::permissions): Qualify mode_t.
8002
8003 2021-02-09  Jakub Jelinek  <jakub@redhat.com>
8004
8005         PR middle-end/98465
8006         * include/bits/basic_string.tcc (basic_string::_M_replace): When __s
8007         points to the characters moved by earlier _S_move, compute the source
8008         address using expression based on the __p pointer rather than __s
8009         pointer.
8010
8011 2021-02-03  Jonathan Wakely  <jwakely@redhat.com>
8012
8013         * testsuite/19_diagnostics/error_code/operators/not_equal.cc:
8014         Add comparison with same category and different values.
8015         * testsuite/19_diagnostics/error_code/operators/less.cc:
8016         Likewise. Fix comparison involving different categories.
8017         * testsuite/19_diagnostics/error_code/operators/three_way.cc:
8018         Likewise.
8019         * testsuite/19_diagnostics/error_condition/operators/less.cc:
8020         Add comment.
8021         * testsuite/19_diagnostics/error_condition/operators/three_way.cc:
8022         Likewise.
8023
8024 2021-02-03  yaozhongxiao  <yaozhongxiao@linux.alibaba.com>
8025
8026         * include/experimental/bits/simd_neon.h: Replace repeated vpadd
8027         calls with a single vaddv for aarch64.
8028
8029 2021-02-03  Matthias Kretz  <kretz@kde.org>
8030
8031         * testsuite/Makefile.am: Warn about the workaround. Add
8032         -fno-tree-vrp to CXXFLAGS passed to the check_simd script.
8033         Improve initial user feedback from make check-simd.
8034         * testsuite/Makefile.in: Regenerated.
8035
8036 2021-02-03  Matthias Kretz  <kretz@kde.org>
8037
8038         * include/experimental/bits/simd.h: Add __detail::_Minimum and
8039         __detail::_Maximum to use them as _BinaryOperation to _S_reduce.
8040         Add hmin and hmax overloads for simd and const_where_expression.
8041         * include/experimental/bits/simd_scalar.h
8042         (_SimdImplScalar::_S_reduce): Make unused _BinaryOperation
8043         parameter const-ref to allow calling _S_reduce with an rvalue.
8044         * testsuite/experimental/simd/tests/reductions.cc: Add tests for
8045         hmin and hmax. Since the compiler statically determined that all
8046         tests pass, repeat the test after a call to make_value_unknown.
8047
8048 2021-02-03  Matthias Kretz  <kretz@kde.org>
8049
8050         * testsuite/experimental/simd/tests/bits/verify.h (verify): Add
8051         instruction pointer data member. Ensure that the `if (m_failed)`
8052         branch is always inlined into the calling code. The body of the
8053         conditional can still be a function call. Move the get_ip call
8054         into the verify ctor to simplify the ctor calls.
8055         (COMPARE): Don't mention the use of all_of for reduction of a
8056         simd_mask. It only distracts from the real issue.
8057
8058 2021-02-03  Matthias Kretz  <kretz@kde.org>
8059
8060         * testsuite/experimental/simd/driver.sh: Abstract reading test
8061         options into read_src_option function. Read skip, only,
8062         expensive, and xfail via read_src_option. Add timeout and
8063         timeout-factor options and adjust timeout variable accordingly.
8064         * testsuite/experimental/simd/tests/loadstore.cc: Set
8065         timeout-factor 2.
8066
8067 2021-02-03  Matthias Kretz  <kretz@kde.org>
8068
8069         * testsuite/experimental/simd/driver.sh: When handling the pipe
8070         to log (and on verbose to stdout) count the lines. If it exceeds
8071         1000 log the issue and exit 125, which is then handled as a
8072         failure.
8073
8074 2021-02-03  Matthias Kretz  <kretz@kde.org>
8075
8076         * testsuite/experimental/simd/tests/hypot3_fma.cc: Add skip:
8077         markup for long double on powerpc64*.
8078
8079 2021-02-03  Matthias Kretz  <kretz@kde.org>
8080
8081         * include/experimental/bits/simd.h: Add __have_power10vec
8082         conditional on _ARCH_PWR10.
8083         * include/experimental/bits/simd_builtin.h: Forward declare
8084         _MaskImplPpc and use it as _MaskImpl when __ALTIVEC__ is
8085         defined.
8086         (_MaskImplBuiltin::_S_some_of): Call _S_popcount from the
8087         _SuperImpl for optimizations and correctness.
8088         * include/experimental/bits/simd_ppc.h: Add _MaskImplPpc.
8089         (_MaskImplPpc::_S_popcount): Implement via vec_cntm for POWER10.
8090         Otherwise, for >=int use -vec_sums divided by a sizeof factor.
8091         For <int use -vec_sums(vec_sum4s(...)) to sum all mask entries.
8092
8093 2021-02-03  Matthias Kretz  <kretz@kde.org>
8094
8095         * testsuite/experimental/simd/driver.sh: Remove executable on
8096         SIGINT. Process compiler and test executable output: In verbose
8097         mode print messages immediately, limited to 1000 lines and
8098         breaking long lines to below $COLUMNS (or 1024 if not set).
8099         Communicating the exit status of the compiler / test with the
8100         necessary pipe is done via a message through stdout/-in.
8101
8102 2021-02-03  Matthias Kretz  <kretz@kde.org>
8103
8104         * testsuite/Makefile.am: Ensure .simd.summary is empty before
8105         collecting a new summary.
8106         * testsuite/Makefile.in: Regenerate.
8107
8108 2021-02-03  Matthias Kretz  <kretz@kde.org>
8109
8110         * testsuite/experimental/simd/generate_makefile.sh: Use
8111         different variables internally than documented for user
8112         overrides. This makes internal append/prepend work as intended.
8113
8114 2021-02-03  Matthias Kretz  <kretz@kde.org>
8115
8116         * testsuite/experimental/simd/driver.sh (verify_test): Print
8117         test output on run xfail. Do not repeat lines from the log that
8118         were already printed on stdout.
8119         (test_selector): Make the compiler flags pattern usable as a
8120         substring selector.
8121         (toplevel): Trap on SIGINT and remove the log and sum files.
8122         Call timout with --foreground to quickly terminate on SIGINT.
8123         * testsuite/experimental/simd/generate_makefile.sh: Simplify run
8124         targets via target patterns. Default DRIVEROPTS to -v for run
8125         targets. Remove log and sum files after completion of the run
8126         target (so that it's always recompiled).
8127         Place help text into text file for reasonable 'make help'
8128         performance.
8129
8130 2021-02-03  Matthias Kretz  <kretz@kde.org>
8131
8132         * include/experimental/bits/simd.h: Remove unnecessary static
8133         assertion. Allow sizeof(8) integer __intrinsic_type to enable
8134         the necessary mask type.
8135
8136 2021-02-03  Matthias Kretz  <kretz@kde.org>
8137
8138         * include/experimental/bits/simd.h: Let __intrinsic_type<long
8139         double, N> be valid if sizeof(long double) == sizeof(double) and
8140         use a __vector double as member type.
8141
8142 2021-02-03  Matthias Kretz  <kretz@kde.org>
8143
8144         * include/experimental/bits/simd.h (__is_intrinsic_type): New
8145         internal type trait. Alias for __is_vector_type on x86.
8146         (_VectorTraitsImpl): Enable for __intrinsic_type in addition for
8147         __vector_type.
8148         (__intrin_bitcast): Allow casting to & from vector & intrinsic
8149         types.
8150         (__intrinsic_type): Explicitly specialize for NEON intrinsic
8151         vector types.
8152
8153 2021-02-03  Matthias Kretz  <kretz@kde.org>
8154
8155         * testsuite/experimental/simd/driver.sh: Implement skip, only,
8156         expensive, and xfail markers. They can select on type, ABI tag
8157         subset number, target-triplet, and compiler flags.
8158         * testsuite/experimental/simd/generate_makefile.sh: The summary
8159         now includes lines for unexpected passes and expected failures.
8160         If the skip or only markers are only conditional on the type, do
8161         not generate rules for those types.
8162         * testsuite/experimental/simd/tests/abs.cc: Mark test expensive
8163         for ABI tag subsets 1-9.
8164         * testsuite/experimental/simd/tests/algorithms.cc: Ditto.
8165         * testsuite/experimental/simd/tests/broadcast.cc: Ditto.
8166         * testsuite/experimental/simd/tests/casts.cc: Ditto.
8167         * testsuite/experimental/simd/tests/generator.cc: Ditto.
8168         * testsuite/experimental/simd/tests/integer_operators.cc: Ditto.
8169         * testsuite/experimental/simd/tests/loadstore.cc: Ditto.
8170         * testsuite/experimental/simd/tests/mask_broadcast.cc: Ditto.
8171         * testsuite/experimental/simd/tests/mask_conversions.cc: Ditto.
8172         * testsuite/experimental/simd/tests/mask_implicit_cvt.cc: Ditto.
8173         * testsuite/experimental/simd/tests/mask_loadstore.cc: Ditto.
8174         * testsuite/experimental/simd/tests/mask_operator_cvt.cc: Ditto.
8175         * testsuite/experimental/simd/tests/mask_operators.cc: Ditto.
8176         * testsuite/experimental/simd/tests/mask_reductions.cc: Ditto.
8177         * testsuite/experimental/simd/tests/operator_cvt.cc: Ditto.
8178         * testsuite/experimental/simd/tests/operators.cc: Ditto.
8179         * testsuite/experimental/simd/tests/reductions.cc: Ditto.
8180         * testsuite/experimental/simd/tests/simd.cc: Ditto.
8181         * testsuite/experimental/simd/tests/split_concat.cc: Ditto.
8182         * testsuite/experimental/simd/tests/splits.cc: Ditto.
8183         * testsuite/experimental/simd/tests/where.cc: Ditto.
8184         * testsuite/experimental/simd/tests/fpclassify.cc: Ditto. In
8185         addition replace "test only floattypes" marker by unconditional
8186         "float|double|ldouble" only marker.
8187         * testsuite/experimental/simd/tests/frexp.cc: Ditto.
8188         * testsuite/experimental/simd/tests/hypot3_fma.cc: Ditto.
8189         * testsuite/experimental/simd/tests/ldexp_scalbn_scalbln_modf.cc:
8190         Ditto.
8191         * testsuite/experimental/simd/tests/logarithm.cc: Ditto.
8192         * testsuite/experimental/simd/tests/math_1arg.cc: Ditto.
8193         * testsuite/experimental/simd/tests/math_2arg.cc: Ditto.
8194         * testsuite/experimental/simd/tests/remqo.cc: Ditto.
8195         * testsuite/experimental/simd/tests/trigonometric.cc: Ditto.
8196         * testsuite/experimental/simd/tests/trunc_ceil_floor.cc: Ditto.
8197         * testsuite/experimental/simd/tests/sincos.cc: Ditto. In
8198         addition, xfail on run because the reference data is missing.
8199
8200 2021-02-02  Jonathan Wakely  <jwakely@redhat.com>
8201
8202         * doc/xml/manual/status_cxx2011.xml: Remove stray table cell.
8203         * doc/xml/manual/status_cxx2014.xml: Likewise.
8204         * doc/xml/manual/status_cxx2017.xml: Likewise.
8205         * doc/html/manual/status.html: Regenerate.
8206
8207 2021-02-01  François Dumont  <fdumont@gcc.gnu.org>
8208
8209         PR libstdc++/70303
8210         * include/bits/stl_deque.h (std::deque<>::operator-(iterator, iterator)):
8211         Return 0 if both iterators are value-initialized.
8212         * testsuite/23_containers/deque/70303.cc: New test.
8213         * testsuite/23_containers/vector/70303.cc: New test.
8214
8215 2021-02-01  Jonathan Wakely  <jwakely@redhat.com>
8216
8217         * doc/xml/manual/status_cxx2011.xml: Update std::call_once
8218         status.
8219         * doc/xml/manual/status_cxx2014.xml: Likewise.
8220         * doc/xml/manual/status_cxx2017.xml: Likewise. Update
8221         std::from_chars and std::to_chars status. Fix formatting.
8222         * doc/html/manual/status.html: Regenerate.
8223
8224 2021-01-28  Jonathan Wakely  <jwakely@redhat.com>
8225
8226         * include/experimental/bits/numeric_traits.h: Update copyright
8227         dates.
8228         * include/experimental/bits/simd.h: Likewise.
8229         * include/experimental/bits/simd_builtin.h: Likewise.
8230         * include/experimental/bits/simd_converter.h: Likewise.
8231         * include/experimental/bits/simd_detail.h: Likewise.
8232         * include/experimental/bits/simd_fixed_size.h: Likewise.
8233         * include/experimental/bits/simd_math.h: Likewise.
8234         * include/experimental/bits/simd_neon.h: Likewise.
8235         * include/experimental/bits/simd_ppc.h: Likewise.
8236         * include/experimental/bits/simd_scalar.h: Likewise.
8237         * include/experimental/bits/simd_x86.h: Likewise.
8238         * include/experimental/bits/simd_x86_conversions.h: Likewise.
8239         * include/experimental/simd: Likewise.
8240         * testsuite/experimental/simd/*: Likewise.
8241
8242 2021-01-27  Jonathan Wakely  <jwakely@redhat.com>
8243
8244         * doc/xml/manual/status_cxx2017.xml: Replace invalid entity.
8245         * doc/html/*: Regenerate.
8246
8247 2021-01-27  Jonathan Wakely  <jwakely@redhat.com>
8248
8249         * testsuite/experimental/simd/generate_makefile.sh: Use printf
8250         instead of echo when printing escape characters.
8251
8252 2021-01-27  Matthias Kretz  <kretz@kde.org>
8253
8254         * scripts/check_simd: New file. This script is called from the
8255         the check-simd target. It determines a set of compiler flags and
8256         simulator setups for calling generate_makefile.sh and passes the
8257         information back to the check-simd target, which recurses to the
8258         generated Makefiles.
8259         * scripts/create_testsuite_files: Remove files below simd/tests/
8260         from testsuite_files and place them in testsuite_files_simd.
8261         * testsuite/Makefile.am: Add testsuite_files_simd. Add
8262         check-simd target.
8263         * testsuite/Makefile.in: Regenerate.
8264         * testsuite/experimental/simd/driver.sh: New file. This script
8265         compiles and runs a given simd test, logging its output and
8266         status. It uses the timeout command to implement compile and
8267         test timeouts.
8268         * testsuite/experimental/simd/generate_makefile.sh: New file.
8269         This script generates a Makefile which uses driver.sh to compile
8270         and run the tests and collect the logs into a single log file.
8271         * testsuite/experimental/simd/tests/abs.cc: New file. Tests
8272         abs(simd).
8273         * testsuite/experimental/simd/tests/algorithms.cc: New file.
8274         Tests min/max(simd, simd).
8275         * testsuite/experimental/simd/tests/bits/conversions.h: New
8276         file. Contains functions to support tests involving conversions.
8277         * testsuite/experimental/simd/tests/bits/make_vec.h: New file.
8278         Support functions make_mask and make_vec.
8279         * testsuite/experimental/simd/tests/bits/mathreference.h: New
8280         file. Support functions to supply precomputed math function
8281         reference data.
8282         * testsuite/experimental/simd/tests/bits/metahelpers.h: New
8283         file. Support code for SFINAE testing.
8284         * testsuite/experimental/simd/tests/bits/simd_view.h: New file.
8285         * testsuite/experimental/simd/tests/bits/test_values.h: New
8286         file. Test functions to easily drive a test with simd objects
8287         initialized from a given list of values and a range of random
8288         values.
8289         * testsuite/experimental/simd/tests/bits/ulp.h: New file.
8290         Support code to determine the ULP distance of simd objects.
8291         * testsuite/experimental/simd/tests/bits/verify.h: New file.
8292         Test framework for COMPARE'ing simd objects and instantiating
8293         the test templates with value_type and ABI tag.
8294         * testsuite/experimental/simd/tests/broadcast.cc: New file. Test
8295         simd broadcasts.
8296         * testsuite/experimental/simd/tests/casts.cc: New file. Test
8297         simd casts.
8298         * testsuite/experimental/simd/tests/fpclassify.cc: New file.
8299         Test floating-point classification functions.
8300         * testsuite/experimental/simd/tests/frexp.cc: New file. Test
8301         frexp(simd).
8302         * testsuite/experimental/simd/tests/generator.cc: New file. Test
8303         simd generator constructor.
8304         * testsuite/experimental/simd/tests/hypot3_fma.cc: New file.
8305         Test 3-arg hypot(simd,simd,simd) and fma(simd,simd,sim).
8306         * testsuite/experimental/simd/tests/integer_operators.cc: New
8307         file. Test integer operators.
8308         * testsuite/experimental/simd/tests/ldexp_scalbn_scalbln_modf.cc:
8309         New file. Test ldexp(simd), scalbn(simd), scalbln(simd), and
8310         modf(simd).
8311         * testsuite/experimental/simd/tests/loadstore.cc: New file. Test
8312         (converting) simd loads and stores.
8313         * testsuite/experimental/simd/tests/logarithm.cc: New file. Test
8314         log*(simd).
8315         * testsuite/experimental/simd/tests/mask_broadcast.cc: New file.
8316         Test simd_mask broadcasts.
8317         * testsuite/experimental/simd/tests/mask_conversions.cc: New
8318         file. Test simd_mask conversions.
8319         * testsuite/experimental/simd/tests/mask_implicit_cvt.cc: New
8320         file. Test simd_mask implicit conversions.
8321         * testsuite/experimental/simd/tests/mask_loadstore.cc: New file.
8322         Test simd_mask loads and stores.
8323         * testsuite/experimental/simd/tests/mask_operator_cvt.cc: New
8324         file. Test simd_mask operators convert as specified.
8325         * testsuite/experimental/simd/tests/mask_operators.cc: New file.
8326         Test simd_mask compares, subscripts, and negation.
8327         * testsuite/experimental/simd/tests/mask_reductions.cc: New
8328         file. Test simd_mask reductions.
8329         * testsuite/experimental/simd/tests/math_1arg.cc: New file. Test
8330         1-arg math functions on simd.
8331         * testsuite/experimental/simd/tests/math_2arg.cc: New file. Test
8332         2-arg math functions on simd.
8333         * testsuite/experimental/simd/tests/operator_cvt.cc: New file.
8334         Test implicit conversions on simd binary operators behave as
8335         specified.
8336         * testsuite/experimental/simd/tests/operators.cc: New file. Test
8337         simd compares, subscripts, not, unary minus, plus, minus,
8338         multiplies, divides, increment, and decrement.
8339         * testsuite/experimental/simd/tests/reductions.cc: New file.
8340         Test reduce(simd).
8341         * testsuite/experimental/simd/tests/remqo.cc: New file. Test
8342         remqo(simd).
8343         * testsuite/experimental/simd/tests/simd.cc: New file. Basic
8344         sanity checks of simd types.
8345         * testsuite/experimental/simd/tests/sincos.cc: New file. Test
8346         sin(simd) and cos(simd).
8347         * testsuite/experimental/simd/tests/split_concat.cc: New file.
8348         Test split(simd) and concat(simd, simd).
8349         * testsuite/experimental/simd/tests/splits.cc: New file. Test
8350         split(simd_mask).
8351         * testsuite/experimental/simd/tests/trigonometric.cc: New file.
8352         Test remaining trigonometric functions on simd.
8353         * testsuite/experimental/simd/tests/trunc_ceil_floor.cc: New
8354         file. Test trunc(simd), ceil(simd), and floor(simd).
8355         * testsuite/experimental/simd/tests/where.cc: New file. Test
8356         masked operations using where.
8357
8358 2021-01-27  Matthias Kretz  <kretz@kde.org>
8359
8360         * doc/xml/manual/status_cxx2017.xml: Add implementation status
8361         of the Parallelism TS 2. Document implementation-defined types
8362         and behavior.
8363         * include/Makefile.am: Add new headers.
8364         * include/Makefile.in: Regenerate.
8365         * include/experimental/simd: New file. New header for
8366         Parallelism TS 2.
8367         * include/experimental/bits/numeric_traits.h: New file.
8368         Implementation of P1841R1 using internal naming. Addition of
8369         missing IEC559 functionality query.
8370         * include/experimental/bits/simd.h: New file. Definition of the
8371         public simd interfaces and general implementation helpers.
8372         * include/experimental/bits/simd_builtin.h: New file.
8373         Implementation of the _VecBuiltin simd_abi.
8374         * include/experimental/bits/simd_converter.h: New file. Generic
8375         simd conversions.
8376         * include/experimental/bits/simd_detail.h: New file. Internal
8377         macros for the simd implementation.
8378         * include/experimental/bits/simd_fixed_size.h: New file. Simd
8379         fixed_size ABI specific implementations.
8380         * include/experimental/bits/simd_math.h: New file. Math
8381         overloads for simd.
8382         * include/experimental/bits/simd_neon.h: New file. Simd NEON
8383         specific implementations.
8384         * include/experimental/bits/simd_ppc.h: New file. Implement bit
8385         shifts to avoid invalid results for integral types smaller than
8386         int.
8387         * include/experimental/bits/simd_scalar.h: New file. Simd scalar
8388         ABI specific implementations.
8389         * include/experimental/bits/simd_x86.h: New file. Simd x86
8390         specific implementations.
8391         * include/experimental/bits/simd_x86_conversions.h: New file.
8392         x86 specific conversion optimizations. The conversion patterns
8393         work around missing conversion patterns in the compiler and
8394         should be removed as soon as PR85048 is resolved.
8395         * testsuite/experimental/simd/standard_abi_usable.cc: New file.
8396         Test that all (not all fixed_size<N>, though) standard simd and
8397         simd_mask types are usable.
8398         * testsuite/experimental/simd/standard_abi_usable_2.cc: New
8399         file. As above but with -ffast-math.
8400         * testsuite/libstdc++-dg/conformance.exp: Don't build simd tests
8401         from the standard test loop. Instead use
8402         check_vect_support_and_set_flags to build simd tests with the
8403         relevant machine flags.
8404
8405 2021-01-27  Jonathan Wakely  <jwakely@redhat.com>
8406
8407         PR libstdc++/66414
8408         * include/bits/string_view.tcc
8409         (basic_string_view::find(const CharT*, size_type, size_type)):
8410         Optimize.
8411
8412 2021-01-27  Paul Fee  <paul.f.fee@gmail.com>
8413
8414         * include/bits/basic_string.h (basic_string::contains): New
8415         member functions.
8416         * include/std/string_view (basic_string_view::contains):
8417         Likewise.
8418         * include/std/version (__cpp_lib_string_contains): Define.
8419         * testsuite/21_strings/basic_string/operations/starts_with/char/1.cc:
8420         Remove trailing whitespace.
8421         * testsuite/21_strings/basic_string/operations/starts_with/wchar_t/1.cc:
8422         Likewise.
8423         * testsuite/21_strings/basic_string/operations/contains/char/1.cc: New test.
8424         * testsuite/21_strings/basic_string/operations/contains/wchar_t/1.cc: New test.
8425         * testsuite/21_strings/basic_string_view/operations/contains/char/1.cc: New test.
8426         * testsuite/21_strings/basic_string_view/operations/contains/char/2.cc: New test.
8427         * testsuite/21_strings/basic_string_view/operations/contains/wchar_t/1.cc: New test.
8428
8429 2021-01-21  Jonathan Wakely  <jwakely@redhat.com>
8430
8431         * src/c++17/Makefile.in: Regenerate.
8432
8433 2021-01-20  David Edelsohn  <dje.gcc@gmail.com>
8434
8435         * config/os/aix/ctype_inline.h (bool ctype<char>:: is): Cast
8436         _OBJ_DATA subscript to unsigned char. Add _THREAD_SAFE access to
8437         __lc_type.
8438         (const char* ctype<char>:: is): Same.
8439
8440 2021-01-18  Jonathan Wakely  <jwakely@redhat.com>
8441
8442         PR libstdc++/98725
8443         * testsuite/20_util/unique_ptr/io/lwg2948.cc:  Do not try to
8444         write to a wide character stream if wide character support is
8445         disabled in the library.
8446
8447 2021-01-18  Jonathan Wakely  <jwakely@redhat.com>
8448
8449         * testsuite/27_io/basic_stringstream/cons/char/1.cc: Use
8450         stringbuf not wstringbuf.
8451
8452 2021-01-18  Jakub Jelinek  <jakub@redhat.com>
8453
8454         PR debug/98708
8455         * src/c++11/Makefile.am (cxx11-ios_failure-lt.s, cxx11-ios_failure.s):
8456         Compile with -gno-as-loc-support.
8457         * src/c++11/Makefile.in: Regenerated.
8458
8459 2021-01-16  H.J. Lu  <hjl.tools@gmail.com>
8460
8461         * testsuite/29_atomics/atomic_flag/test_and_set/explicit-hle.cc:
8462         Add -fcf-protection=none to -march=i486.
8463
8464 2021-01-14  François Dumont  <fdumont@gcc.gnu.org>
8465
8466         * testsuite/23_containers/deque/debug/98466.cc: Make it pre-C++11
8467         compliant.
8468
8469 2021-01-14  Alexandre Oliva  <oliva@adacore.com>
8470
8471         * testsuite/30_threads/future/members/poll.cc: Calibrate
8472         iteration count.
8473
8474 2021-01-14  François Dumont  <fdumont@gcc.gnu.org>
8475
8476         PR libstdc++/98466
8477         * include/bits/hashtable_policy.h (_Node_iterator_base()): Set _M_cur to nullptr.
8478         (_Node_iterator()): Make default.
8479         (_Node_const_iterator()): Make default.
8480         * include/debug/macros.h (__glibcxx_check_erae_range_after): Add _M_singular
8481         iterator checks.
8482         * include/debug/safe_iterator.h
8483         (_GLIBCXX_DEBUG_VERIFY_OPERANDS): Accept if both iterator are value initialized.
8484         * include/debug/safe_local_iterator.h (_GLIBCXX_DEBUG_VERIFY_OPERANDS):
8485         Likewise.
8486         * include/debug/safe_iterator.tcc (_Safe_iterator<>::_M_valid_range): Add
8487         _M_singular checks on input iterators.
8488         * src/c++11/debug.cc (_Safe_iterator_base::_M_can_compare): Remove _M_singular
8489         checks.
8490         * testsuite/23_containers/deque/debug/98466.cc: New test.
8491         * testsuite/23_containers/unordered_map/debug/98466.cc: New test.
8492
8493 2021-01-14  Jonathan Wakely  <jwakely@redhat.com>
8494
8495         PR libstdc++/98471
8496         * include/bits/fs_path.h (__throw_conversion_error): New
8497         function to throw or abort on character conversion errors.
8498         (__wstr_from_utf8): Move definition after filesystem_error has
8499         been defined. Use __throw_conversion_error.
8500         (path::_S_convert<_EcharT>): Use __throw_conversion_error.
8501         (path::_S_str_convert<_CharT, _Traits, _Allocator>): Likewise.
8502         (path::u8string): Likewise.
8503
8504 2021-01-14  Jonathan Wakely  <jwakely@redhat.com>
8505
8506         * include/std/barrier: Update copyright years. Fix whitespace.
8507         * include/std/version: Fix whitespace.
8508         * testsuite/30_threads/barrier/1.cc: Update copyright years.
8509         * testsuite/30_threads/barrier/2.cc: Likewise.
8510         * testsuite/30_threads/barrier/arrive.cc: Likewise.
8511         * testsuite/30_threads/barrier/arrive_and_drop.cc: Likewise.
8512         * testsuite/30_threads/barrier/arrive_and_wait.cc: Likewise.
8513         * testsuite/30_threads/barrier/completion.cc: Likewise.
8514
8515 2021-01-13  Jonathan Wakely  <jwakely@redhat.com>
8516
8517         * doc/doxygen/user.cfg.in (INPUT): Remove include/debug/array.
8518
8519 2021-01-10  David Edelsohn  <dje.gcc@gmail.com>
8520
8521         PR libstdc++/98613
8522         * testsuite/ext/vstring/cons/moveable.cc: Suppress false positive
8523         warning.
8524         * testsuite/ext/vstring/modifiers/assign/move_assign.cc: Same.
8525
8526 2021-01-08  Olivier Hainque  <hainque@adacore.com>
8527
8528         * testsuite/20_util/bind/ref_neg.cc: Tweak the
8529         dg-prune-output regex for out-of-build-tree contexts.
8530
8531 2021-01-07  Thomas Rodgers  <trodgers@redhat.com>
8532
8533         * doc/doxygen/user.cfg.in: Add new header.
8534         * include/Makefile.am (std_headers): likewise.
8535         * include/Makefile.in: Regenerate.
8536         * include/precompiled/stdc++.h: Add new header.
8537         * include/std/barrier: New file.
8538         * include/std/version: Add __cpp_lib_barrier feature test macro.
8539         * testsuite/30_threads/barrier/1.cc: New test.
8540         * testsuite/30_threads/barrier/2.cc: Likewise.
8541         * testsuite/30_threads/barrier/arrive_and_drop.cc: Likewise.
8542         * testsuite/30_threads/barrier/arrive_and_wait.cc: Likewise.
8543         * testsuite/30_threads/barrier/arrive.cc: Likewise.
8544         * testsuite/30_threads/barrier/completion.cc: Likewise.
8545
8546 2021-01-07  Patrick Palka  <ppalka@redhat.com>
8547
8548         PR libstdc++/98384
8549         * testsuite/20_util/to_chars/long_double.cc: Use nexttowardl
8550         instead of the non-standard nextupl and nextdownl.
8551
8552 2021-01-05  Samuel Thibault  <samuel.thibault@ens-lyon.org>
8553
8554         * configure: Re-generate.
8555
8556 2021-01-05  Ed Smith-Rowland  <3dw4rd@verizon.net>
8557
8558         * include/precompiled/stdc++.h: Add <source_location> to C++20 section.
8559
8560 2021-01-01  Jakub Jelinek  <jakub@redhat.com>
8561
8562         * ChangeLog-2020: Rotate ChangeLog.  New file.
8563
8564 \f
8565 Copyright (C) 2021 Free Software Foundation, Inc.
8566
8567 Copying and distribution of this file, with or without modification,
8568 are permitted in any medium without royalty provided the copyright
8569 notice and this notice are preserved.