libstdc++-v3/ChangeLog

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