libstdc++-v3/ChangeLog

   1 2021-06-25  Jonathan Wakely  <jwakely@redhat.com>
   2
   3         * include/bits/ostream.tcc (basic_ostream::write): Call sputn
   4         directly instead of using _M_write. Do setstate(__err) all
   5         outside the try-catch block.
   6         * include/std/ostream (basic_ostream::_M_write): Declare
   7         private. Use __ostream_insert. Do not define for the versioned
   8         namespace.
   9
  10 2021-06-25  Jonathan Wakely  <jwakely@redhat.com>
  11
  12         * doc/xml/manual/intro.xml: Document LWG 581 change.
  13         * doc/html/manual/bugs.html: Regenerate.
  14         * include/bits/basic_ios.tcc: Whitespace.
  15         * include/bits/ostream.tcc (basic_ostream::flush()): Construct
  16         sentry.
  17         * testsuite/27_io/basic_ostream/flush/char/2.cc: Check
  18         additional cases.
  19         * testsuite/27_io/basic_ostream/flush/char/exceptions_badbit_throw.cc:
  20         Likewise.
  21         * testsuite/27_io/basic_ostream/flush/wchar_t/2.cc: Likewise.
  22         * testsuite/27_io/basic_ostream/flush/wchar_t/exceptions_badbit_throw.cc:
  23         Likewise.
  24
  25 2021-06-25  Jonathan Wakely  <jwakely@redhat.com>
  26
  27         * include/bits/ostream.tcc (sentry): Only set failbit if badbit
  28         is set, not if eofbit is set.
  29         (tellp, seekp, seekp): Create sentry object. Do not set badbit
  30         on exceptions.
  31         * testsuite/27_io/basic_ostream/seekp/char/exceptions_badbit_throw.cc:
  32         Adjust expected behaviour.
  33         * testsuite/27_io/basic_ostream/seekp/wchar_t/exceptions_badbit_throw.cc:
  34         Likewise.
  35         * testsuite/27_io/basic_ostream/tellp/char/exceptions_badbit_throw.cc:
  36         Likewise.
  37         * testsuite/27_io/basic_ostream/tellp/wchar_t/exceptions_badbit_throw.cc:
  38         Likewise.
  39         * testsuite/27_io/basic_ostream/seekp/char/n3168.cc: New test.
  40         * testsuite/27_io/basic_ostream/seekp/wchar_t/n3168.cc: New test.
  41         * testsuite/27_io/basic_ostream/tellp/char/n3168.cc: New test.
  42         * testsuite/27_io/basic_ostream/tellp/wchar_t/n3168.cc: New test.
  43
  44 2021-06-25  Jonathan Wakely  <jwakely@redhat.com>
  45
  46         * include/std/syncstream (basic_syncbuf::swap()): Remove
  47         noexcept, as per LWG 3498.
  48
  49 2021-06-25  Jonathan Wakely  <jwakely@redhat.com>
  50
  51         PR libstdc++/97088
  52         * testsuite/17_intro/names.cc: Undef more names for newlib and
  53         also for arm-none-linux-gnueabi.
  54         * testsuite/experimental/names.cc: Disable PCH.
  55
  56 2021-06-25  Matthias Kretz  <m.kretz@gsi.de>
  57
  58         * include/experimental/bits/simd.h (__bit_cast): Implement via
  59         __builtin_bit_cast #if available.
  60         (__proposed::simd_bit_cast): Add overloads for simd and
  61         simd_mask, which use __builtin_bit_cast (or __bit_cast #if not
  62         available), which return an object of the requested type with
  63         the same bits as the argument.
  64         * include/experimental/bits/simd_math.h: Use simd_bit_cast
  65         instead of __bit_cast to allow casts to fixed_size_simd.
  66         (copysign): Remove branch that was only required if __bit_cast
  67         cannot be constexpr.
  68         * testsuite/experimental/simd/tests/bits/test_values.h: Switch
  69         from __bit_cast to __proposed::simd_bit_cast since the former
  70         will not cast fixed_size objects anymore.
  71
  72 2021-06-24  Matthias Kretz  <m.kretz@gsi.de>
  73
  74         * include/experimental/bits/simd_math.h
  75         (_GLIBCXX_SIMD_MATH_CALL2_): Rename arg2_ to __arg2.
  76         (_GLIBCXX_SIMD_MATH_CALL3_): Rename arg2_ to __arg2 and arg3_ to
  77         __arg3.
  78
  79 2021-06-24  Matthias Kretz  <m.kretz@gsi.de>
  80
  81         * include/experimental/bits/simd.h (__execute_on_index_sequence)
  82         (__execute_on_index_sequence_with_return)
  83         (__call_with_n_evaluations, __call_with_subscripts): Add flatten
  84         attribute.
  85
  86 2021-06-24  Matthias Kretz  <m.kretz@gsi.de>
  87
  88         * include/experimental/bits/simd_x86.h (_S_trunc, _S_floor)
  89         (_S_ceil): Set bit 8 (_MM_FROUND_NO_EXC) on AVX and SSE4.1
  90         roundp[sd] calls.
  91
  92 2021-06-24  Matthias Kretz  <m.kretz@gsi.de>
  93
  94         * include/experimental/bits/simd_x86.h (_S_ldexp): The AVX512F
  95         implementation doesn't require a _VecBltnBtmsk ABI tag, it
  96         requires either a 64-Byte input (in which case AVX512F must be
  97         available) or AVX512VL.
  98
  99 2021-06-24  Matthias Kretz  <m.kretz@gsi.de>
 100
 101         * include/experimental/bits/simd_math.h: Undefine internal
 102         macros after use.
 103         (frexp): Move #if to a more sensible position and reformat
 104         preceding code.
 105         (logb): Call _SimdImpl::_S_logb for fixed_size instead of
 106         duplicating the code here.
 107         (modf): Simplify condition.
 108
 109 2021-06-24  Matthias Kretz  <m.kretz@gsi.de>
 110
 111         * include/experimental/bits/simd_math.h (fabs): Remove
 112         fabs(simd<integral>) overload.
 113
 114 2021-06-24  Matthias Kretz  <m.kretz@gsi.de>
 115
 116         * include/experimental/bits/simd_converter.h
 117         (_SimdConverter::operator()): Pass _SimdTuple by const-ref.
 118         * include/experimental/bits/simd_fixed_size.h
 119         (_GLIBCXX_SIMD_FIXED_OP): Pass binary operator _SimdTuple
 120         arguments by const-ref.
 121         (_S_masked_unary): Pass _SimdTuple by const-ref.
 122
 123 2021-06-24  Matthias Kretz  <m.kretz@gsi.de>
 124
 125         * include/experimental/bits/simd_fixed_size.h
 126         (_AbisInSimdTuple): Removed.
 127
 128 2021-06-24  Matthias Kretz  <m.kretz@gsi.de>
 129
 130         * include/experimental/bits/simd.h: Add missing operator~
 131         overload for simd<floating-point> to __float_bitwise_operators.
 132         * include/experimental/bits/simd_builtin.h
 133         (_SimdImplBuiltin::_S_complement): Bitcast to int (and back) to
 134         implement complement for floating-point vectors.
 135         * include/experimental/bits/simd_fixed_size.h
 136         (_SimdImplFixedSize::_S_copysign): New function, forwarding to
 137         copysign implementation of _SimdTuple members.
 138         * include/experimental/bits/simd_math.h (copysign): Call
 139         _SimdImpl::_S_copysign for fixed_size arguments. Simplify
 140         generic copysign implementation using the new ~ operator.
 141
 142 2021-06-24  Jonathan Wakely  <jwakely@redhat.com>
 143
 144         * testsuite/experimental/simd/README.md: Fix typos.
 145
 146 2021-06-24  Jonathan Wakely  <jwakely@redhat.com>
 147
 148         * include/bits/shared_ptr_base.h (__shared_ptr_access::operator[]):
 149         Add noexcept.
 150         * include/bits/unique_ptr.h (unique_ptr::operator*): Add
 151         conditional noexcept as per LWG 2762.
 152         * testsuite/20_util/shared_ptr/observers/array.cc: Check that
 153         dereferencing cannot throw.
 154         * testsuite/20_util/shared_ptr/observers/get.cc: Likewise.
 155         * testsuite/20_util/optional/observers/lwg2762.cc: New test.
 156         * testsuite/20_util/unique_ptr/lwg2762.cc: New test.
 157
 158 2021-06-23  Patrick Palka  <ppalka@redhat.com>
 159
 160         PR c++/101174
 161         * testsuite/23_containers/multiset/cons/deduction.cc:
 162         Uncomment CTAD example that was rejected by this bug.
 163         * testsuite/23_containers/set/cons/deduction.cc: Likewise.
 164
 165 2021-06-23  Jonathan Wakely  <jwakely@redhat.com>
 166
 167         * include/std/chrono (chrono::year::is_leap()): Fix incorrect
 168         logic in comment.
 169
 170 2021-06-23  Matthias Kretz  <m.kretz@gsi.de>
 171
 172         * testsuite/experimental/simd/README.md: New file.
 173
 174 2021-06-23  Matthias Kretz  <m.kretz@gsi.de>
 175
 176         * testsuite/experimental/simd/driver.sh: Rewrite output
 177         verbosity logic. Add -p/--percentage option. Allow -v/--verbose
 178         to be used twice. Add -x and -o short options. Parse long
 179         options with = instead of separating space generically. Parce
 180         contracted short options. Make unrecognized options an error.
 181         If same-line output is active, trap on EXIT to increment the
 182         progress (only with --percentage), erase the line and print the
 183         current status.
 184         * testsuite/experimental/simd/generate_makefile.sh: Initialize
 185         helper files for progress account keeping. Update help target
 186         for changes to DRIVEROPTS.
 187
 188 2021-06-23  Matthias Kretz  <m.kretz@gsi.de>
 189
 190         * testsuite/Makefile.am (check-simd): Remove -fno-tree-vrp flag
 191         and associated warning.
 192         * testsuite/Makefile.in: Regenerate.
 193
 194 2021-06-23  Cassio Neri  <cassio.neri@gmail.com>
 195             Jonathan Wakely  <jwakely@redhat.com>
 196             Ulrich Drepper  <drepper@redhat.com>
 197
 198         * include/std/chrono (chrono::year::is_leap()): Optimize.
 199
 200 2021-06-23  Patrick Palka  <ppalka@redhat.com>
 201
 202         PR c++/86439
 203         * testsuite/23_containers/map/cons/deduction.cc: Replace ambiguous
 204         CTAD examples.
 205         * testsuite/23_containers/multimap/cons/deduction.cc: Likewise.
 206         * testsuite/23_containers/multiset/cons/deduction.cc: Likewise.
 207         Mention one of the replaced examples is broken due to PR101174.
 208         * testsuite/23_containers/set/cons/deduction.cc: Likewise.
 209         * testsuite/23_containers/unordered_map/cons/deduction.cc: Replace
 210         ambiguous CTAD examples.
 211         * testsuite/23_containers/unordered_multimap/cons/deduction.cc:
 212         Likewise.
 213         * testsuite/23_containers/unordered_multiset/cons/deduction.cc:
 214         Likewise.
 215         * testsuite/23_containers/unordered_set/cons/deduction.cc: Likewise.
 216
 217 2021-06-23  Jonathan Wakely  <jwakely@redhat.com>
 218
 219         * include/std/mutex (__detail::__try_lock_impl): Rename
 220         parameter to avoid clashing with newlib's __lockable macro.
 221         (try_lock): Add 'inline' specifier.
 222         * testsuite/17_intro/names.cc: Add check for __lockable.
 223         * testsuite/30_threads/try_lock/5.cc: Add options for pthreads.
 224
 225 2021-06-22  Jonathan Wakely  <jwakely@redhat.com>
 226             Matthias Kretz  <m.kretz@gsi.de>
 227
 228         * include/std/mutex (lock): Replace recursion with iteration
 229         when lockables all have the same type.
 230         (__detail::__try_lock_impl): Likewise. Pass lockables as
 231         parameters, instead of a tuple. Always lock the first one, and
 232         recurse for the rest.
 233         (__detail::__lock_impl): Adjust call to __try_lock_impl.
 234         (__detail::__try_to_lock): Remove.
 235         * testsuite/30_threads/lock/3.cc: Check that mutexes are locked.
 236         * testsuite/30_threads/lock/4.cc: Also test non-heterogeneous
 237         arguments.
 238         * testsuite/30_threads/unique_lock/cons/60497.cc: Also check
 239         std::try_lock.
 240         * testsuite/30_threads/try_lock/5.cc: New test.
 241
 242 2021-06-22  Jonathan Wakely  <jwakely@redhat.com>
 243
 244         * include/std/memory (declare_reachable, undeclare_reachable)
 245         (declare_no_pointers, undeclare_no_pointers, get_pointer_safety)
 246         (pointer_safety): Only define for C++11 to C++20 inclusive.
 247         * testsuite/20_util/pointer_safety/1.cc: Do not run for C++23.
 248
 249 2021-06-22  Jonathan Wakely  <jwakely@redhat.com>
 250
 251         * include/bits/random.h (seed_seq): Constrain initializer-list
 252         constructor.
 253         * include/bits/random.tcc (seed_seq): Add template parameter.
 254         * testsuite/26_numerics/random/seed_seq/cons/default.cc: Check
 255         for noexcept.
 256         * testsuite/26_numerics/random/seed_seq/cons/initlist.cc: Check
 257         constraints.
 258
 259 2021-06-22  Thomas Rodgers  <rodgert@appliantology.com>
 260
 261         PR libstdc++/100806
 262         * include/bits/semaphore_base.h (__atomic_semaphore::_M_release):
 263         Force _M_release() to wake all waiting threads.
 264         * testsuite/30_threads/semaphore/100806.cc: New test.
 265
 266 2021-06-21  Jonathan Wakely  <jwakely@redhat.com>
 267
 268         * include/std/mutex (__try_to_lock): Move to __detail namespace.
 269         (struct __try_lock_impl): Replace with ...
 270         (__detail::__try_lock_impl<Idx>(tuple<Lockables...>&)): New
 271         function templates to implement std::try_lock.
 272         (try_lock): Use new __try_lock_impl.
 273         (__detail::__lock_impl(int, int&, L0&, L1&...)): New function
 274         template to implement std::lock.
 275         (lock): Use __lock_impl.
 276
 277 2021-06-21  Patrick Palka  <ppalka@redhat.com>
 278
 279         * include/bits/ranges_cmp.h (__cpp_lib_ranges): Adjust value.
 280
 281 2021-06-20  Patrick Palka  <ppalka@redhat.com>
 282
 283         * include/std/ranges (__non_propagating_cache::operator bool):
 284         Define for split_view::begin().
 285         (split_view): Define as per P2210.
 286         (views::__detail::__can_split_view): Define.
 287         (views::_Split, views::split): Define.
 288         * testsuite/std/ranges/adaptors/100577.cc (test01, test02):
 289         Test views::split.
 290         * testsuite/std/ranges/adaptors/split.cc: New test.
 291         * testsuite/std/ranges/p2325.cc (test08a): New test.
 292         * testsuite/std/ranges/p2367.cc (test01): Test views::split.
 293
 294 2021-06-20  Patrick Palka  <ppalka@redhat.com>
 295
 296         * include/std/ranges: Rename views::split to views::lazy_split,
 297         split_view to lazy_split_view, etc. throughout.
 298         * testsuite/std/ranges/*: Likewise.
 299         * testsuite/std/ranges/adaptors/lazy_split.cc: New file.
 300         * testsuite/std/ranges/adaptors/lazy_split_neg.cc: New file.
 301
 302 2021-06-20  Patrick Palka  <ppalka@redhat.com>
 303
 304         * include/std/ranges (split_view::_OuterIter::__at_end):
 305         Check _M_trailing_empty.
 306         (split_view::_OuterIter::_M_trailing_empty): Define this
 307         data member.
 308         (split_view::_OuterIter::operator++): Set _M_trailing_empty
 309         appropriately.
 310         (split_view::_OuterIter::operator==): Compare
 311         _M_trailing_empty.
 312         * testsuite/std/ranges/adaptors/100479.cc (test03): Expect two
 313         split parts instead of one.
 314         * testsuite/std/ranges/adaptors/split.cc (test11): New test.
 315
 316 2021-06-20  Patrick Palka  <ppalka@redhat.com>
 317
 318         * include/std/ranges (split_view::_InnerIter::base): Define as
 319         per P2210.
 320
 321 2021-06-19  Patrick Palka  <ppalka@redhat.com>
 322
 323         * include/std/ranges (transform_view::_Iterator::_S_iter_concept):
 324         Consider _Base instead of _Vp as per LWG 3555.
 325         (elements_view::_Iterator::_S_iter_concept): Likewise.
 326
 327 2021-06-19  Patrick Palka  <ppalka@redhat.com>
 328
 329         * include/std/ranges (split_view::_OuterIter::value_type::begin):
 330         Remove the non-const overload, and remove the copyable constraint
 331         on the const overload as per LWG 3553.
 332
 333 2021-06-19  Patrick Palka  <ppalka@redhat.com>
 334
 335         * include/bits/stl_iterator.h
 336         (__detail::__common_iter_use_postfix_proxy): Add
 337         move_constructible constraint as per LWG 3546.
 338         (common_iterator::__postfix_proxy): Adjust initializer of
 339         _M_keep as per LWG 3546.
 340
 341 2021-06-18  Patrick Palka  <ppalka@redhat.com>
 342
 343         PR libstdc++/100387
 344         * include/bits/ranges_algo.h (__minmax_fn::operator()): Rewrite
 345         to limit comparison complexity to 3*N/2.
 346         (__minmax_element_fn::operator()): Likewise.
 347         (shift_right): Avoid premature std::move of __result.
 348         * testsuite/25_algorithms/minmax/constrained.cc (test04, test05):
 349         New tests.
 350         * testsuite/25_algorithms/minmax_element/constrained.cc (test02):
 351         Likewise.
 352
 353 2021-06-18  Patrick Palka  <ppalka@redhat.com>
 354
 355         * include/std/concepts (convertible_to): Just use declval as per
 356         LWG 3557.
 357
 358 2021-06-18  Jonathan Wakely  <jwakely@redhat.com>
 359
 360         PR libstdc++/95833
 361         * include/std/numeric (reduce(Iter, Iter, T, BinaryOp)): Replace
 362         incorrect static_assert with ones matching the 'Mandates'
 363         conditions in the standard.
 364         * testsuite/26_numerics/reduce/95833.cc: New test.
 365
 366 2021-06-18  Jonathan Wakely  <jwakely@redhat.com>
 367
 368         * testsuite/21_strings/basic_string/cons/char/1.cc: Use
 369         diagnostic pragma to suppress -Wstringop-overread error.
 370
 371 2021-06-18  Patrick Palka  <ppalka@redhat.com>
 372
 373         * include/bits/ranges_algo.h (__find_fn, find, __find_if_fn)
 374         (find_if, __find_if_not_fn, find_if_not, _in_in_result)
 375         (__mismatch_fn, mismatch, __search_fn, search): Move to ...
 376         * include/bits/ranges_util.h: ... here.
 377         * include/std/ranges (__detail::find, __detail::find_if)
 378         (__detail::find_if_not, __detail::mismatch): Remove.
 379         (filter_view): Use ranges::find_if instead.
 380         (drop_while_view): Use ranges::find_if_not instead.
 381         (split_view): Use ranges::find and ranges::mismatch instead.
 382
 383 2021-06-18  Patrick Palka  <ppalka@redhat.com>
 384
 385         * include/bits/iterator_concepts.h (weakly_incrementable): Remove
 386         default_initializable requirement.
 387         * include/bits/ranges_base.h (ranges::view): Likewise.
 388         * include/bits/ranges_util.h (subrange): Constrain the default
 389         ctor.
 390         * include/bits/stl_iterator.h (back_insert_iterator): Remove the
 391         default ctor.
 392         (front_insert_iterator): Likewise.
 393         (insert_iterator): Likewise.  Remove NSDMIs.
 394         (common_iterator): Constrain the default ctor.
 395         (counted_iterator): Likewise.
 396         * include/bits/stream_iterator.h (ostream_iterator): Remove the
 397         default ctor.
 398         * include/std/ranges (__detail::__box::operator=): Handle
 399         self-assignment in the primary template.
 400         (__detail::__box): In the partial specialization: adjust
 401         constraints as per P2325.  Add specialized operator= for the
 402         case when the wrapped type is not copyable.  Constrain the
 403         default ctor.  Avoid list-initialization.
 404         (single_view): Constraint the default ctor.
 405         (iota_view): Relax semiregular constraint to copyable.
 406         Constrain the default ctor.
 407         (iota_view::_Iterator): Constraint the default ctor.
 408         (basic_istream_view): Remove the default ctor.  Remove NSDMIs.
 409         Remove redundant checks for empty _M_stream.
 410         (basic_istream_view::_Iterator): Likewise.
 411         (ref_view): Remove the default ctor.  Remove NSDMIs.
 412         (ref_view::_Iterator): Constrain the default ctor.
 413         (__detail::__non_propagating_cache::operator=): Define overload
 414         for assigning from a value of the underlying type.
 415         (filter_view): Likewise.
 416         (filter_view::_Iterator): Likewise.
 417         (transform_view): Likewise.
 418         (transform_view::_Iterator): Likewise.
 419         (take_view): Likewise.
 420         (take_view::_Iterator): Likewise.
 421         (take_while_view): Likewise.
 422         (take_while_view::_Iterator): Likewise.
 423         (drop_while_view): Likewise.
 424         (drop_while_view::_Iterator): Likewise.
 425         (join_view): Likewise.
 426         (split_view::_OuterIter::__current): Adjust after changing the
 427         type of _M_current.
 428         (split_view::_M_current): Wrap it in a __non_propagating_cache.
 429         (split_view::split_view): Constrain the default ctor.
 430         (common_view): Constrain the default ctor.
 431         (reverse_view): Likewise.
 432         (elements_view): Likewise.
 433         * include/std/span (enable_view<span<_ElementType, _Extent>>):
 434         Define this partial specialization to true unconditionally.
 435         * include/std/version (__cpp_lib_ranges): Adjust value.
 436         * testsuite/24_iterators/back_insert_iterator/constexpr.cc:
 437         Don't attempt to default construct a back_insert_iterator.
 438         * testsuite/24_iterators/front_insert_iterator/constexpr.cc:
 439         Don't attempt to default construct a front_insert_iterator.
 440         * testsuite/24_iterators/insert_iterator/constexpr.cc:
 441         Don't attempt to default construct an insert_iterator.
 442         * testsuite/24_iterators/ostream_iterator/requirements/constexpr.cc:
 443         Remove this test for default constructibility of ostream_iterator.
 444         * testsuite/std/ranges/97600.cc: Don't attempt to default
 445         construct a basic_istream_view.
 446         * testsuite/std/ranges/adaptors/detail/semiregular_box.cc:
 447         Rename to ...
 448         * testsuite/std/ranges/adaptors/detail/copyable_box.cc: ... this.
 449         (test02): Adjust now that __box is copyable-box not
 450         semiregular-box.
 451         (test03): New test.
 452         * testsuite/std/ranges/p2325.cc: New test.
 453         * testsuite/std/ranges/single_view.cc (test06): New test.
 454         * testsuite/std/ranges/view.cc: Adjust now that view doesn't
 455         require default_initializable.
 456
 457 2021-06-17  Jonathan Wakely  <jwakely@redhat.com>
 458
 459         PR libstdc++/91488
 460         * include/bits/basic_string.h (__cpp_lib_constexpr_string): Only
 461         define when is_constant_evaluated is available.
 462         * include/bits/char_traits.h (__cpp_lib_constexpr_char_traits):
 463         Likewise.
 464         (__constant_string_p, __constant_array_p): Remove.
 465         (char_traits): Use is_constant_evaluated directly.
 466         * include/std/version (__cpp_lib_constexpr_char_traits)
 467         (__cpp_lib_constexpr_string): Only define when
 468         is_constant_evaluated is available.
 469
 470 2021-06-17  Patrick Palka  <ppalka@redhat.com>
 471
 472         PR libstdc++/100940
 473         * include/std/ranges (__adaptor::_Partial): For the "simple"
 474         forwarding partial specializations, also require that
 475         the extra arguments are trivially copyable.
 476         * testsuite/std/ranges/adaptors/100577.cc (test04): New test.
 477
 478 2021-06-17  Patrick Palka  <ppalka@redhat.com>
 479
 480         PR libstdc++/100940
 481         * include/std/ranges (__adaptor::_RangeAdaptor): Document the
 482         template form of _S_has_simple_extra_args.
 483         (__adaptor::__adaptor_has_simple_extra_args): Add _Args template
 484         parameter pack.  Try to treat _S_has_simple_extra_args as a
 485         variable template parameterized by _Args.
 486         (__adaptor::_Partial): Pass _Arg/_Args to the constraint
 487         __adaptor_has_simple_extra_args.
 488         (views::_Take::_S_has_simple_extra_args): Templatize according
 489         to the type of the extra argument.
 490         (views::_Drop::_S_has_simple_extra_args): Likewise.
 491         (views::_Split::_S_has_simple_extra_args): Define.
 492         * testsuite/std/ranges/adaptors/100577.cc (test01, test02):
 493         Adjust after changes to _S_has_simple_extra_args mechanism.
 494         (test03): Define.
 495
 496 2021-06-16  Jonathan Wakely  <jwakely@redhat.com>
 497
 498         * include/bits/iterator_concepts.h (__decay_copy): Name type.
 499
 500 2021-06-16  Jonathan Wakely  <jwakely@redhat.com>
 501
 502         * include/bits/ranges_base.h (ranges::begin, ranges::end)
 503         (ranges::cbegin, ranges::cend, ranges::rbeing, ranges::rend)
 504         (ranges::crbegin, ranges::crend, ranges::size, ranges::ssize)
 505         (ranges::empty, ranges::data, ranges::cdata): Remove final
 506         keywords and deleted operator& overloads.
 507         * testsuite/24_iterators/customization_points/iter_move.cc: Use
 508         new is_customization_point_object function.
 509         * testsuite/24_iterators/customization_points/iter_swap.cc:
 510         Likewise.
 511         * testsuite/std/concepts/concepts.lang/concept.swappable/swap.cc:
 512         Likewise.
 513         * testsuite/std/ranges/access/begin.cc: Likewise.
 514         * testsuite/std/ranges/access/cbegin.cc: Likewise.
 515         * testsuite/std/ranges/access/cdata.cc: Likewise.
 516         * testsuite/std/ranges/access/cend.cc: Likewise.
 517         * testsuite/std/ranges/access/crbegin.cc: Likewise.
 518         * testsuite/std/ranges/access/crend.cc: Likewise.
 519         * testsuite/std/ranges/access/data.cc: Likewise.
 520         * testsuite/std/ranges/access/empty.cc: Likewise.
 521         * testsuite/std/ranges/access/end.cc: Likewise.
 522         * testsuite/std/ranges/access/rbegin.cc: Likewise.
 523         * testsuite/std/ranges/access/rend.cc: Likewise.
 524         * testsuite/std/ranges/access/size.cc: Likewise.
 525         * testsuite/std/ranges/access/ssize.cc: Likewise.
 526         * testsuite/util/testsuite_iterators.h
 527         (is_customization_point_object): New function.
 528
 529 2021-06-15  Jonathan Wakely  <jwakely@redhat.com>
 530
 531         * include/bits/ranges_base.h (ranges::begin, ranges::end)
 532         (ranges::cbegin, ranges::cend, ranges::rbeing, ranges::rend)
 533         (ranges::crbegin, ranges::crend, ranges::size, ranges::ssize)
 534         (ranges::empty, ranges::data, ranges::cdata): Make types final.
 535         Add deleted operator& overloads.
 536         (ranges::advance, ranges::distance, ranges::next, ranges::prev):
 537         Likewise.
 538         * testsuite/std/ranges/headers/ranges/synopsis.cc: Replace
 539         ill-formed & expressions with using-declarations. Add checks for
 540         other function objects.
 541
 542 2021-06-15  Jonathan Wakely  <jwakely@redhat.com>
 543
 544         * include/bits/ranges_util.h (view_interface): Add noexcept to
 545         empty, operator bool, data and size members.
 546         (subrange): Add noexcept to constructors.
 547         * include/std/ranges (single_view, ref_view): Add noexcept to
 548         constructors.
 549         (views::single, views::all): Add noexcept.
 550         * testsuite/std/ranges/adaptors/all.cc: Check noexcept.
 551         * testsuite/std/ranges/single_view.cc: Likewise.
 552
 553 2021-06-15  Jonathan Wakely  <jwakely@redhat.com>
 554
 555         * include/bits/ranges_util.h (subrange): Add __size_type typedef
 556         and use it to simplify declarations.
 557         (subrange(i, s, n)): Remove assertion.
 558         * testsuite/std/ranges/subrange/constexpr.cc: New test.
 559
 560 2021-06-15  Jonathan Wakely  <jwakely@redhat.com>
 561
 562         * include/bits/iterator_concepts.h (__cust_access::__decay_copy):
 563         Replace with function object.
 564         (__cust_access::__member_begin, ___cust_access::_adl_begin): Use
 565         __decay_copy unqualified.
 566         * include/bits/ranges_base.h (__member_end, __adl_end):
 567         Likewise. Use __range_iter_t for type of ranges::begin.
 568         (__member_rend): Use correct value category for rbegin argument.
 569         (__member_data): Use __decay_copy unqualified.
 570         (__begin_data): Use __range_iter_t for type of ranges::begin.
 571
 572 2021-06-14  Jonathan Wakely  <jwakely@redhat.com>
 573
 574         * include/bits/ranges_base.h (ranges::empty): Check whether
 575         conversion to bool can throw.
 576         * testsuite/std/ranges/access/empty.cc: Check for correct
 577         noexcept-specifier.
 578
 579 2021-06-14  Jonathan Wakely  <jwakely@redhat.com>
 580
 581         PR libstdc++/100894
 582         * include/std/type_traits (__common_ref_impl<X&, Y&>): Only
 583         use the type if it's a reference.
 584         * testsuite/20_util/common_reference/100894.cc: New test.
 585
 586 2021-06-14  Jonathan Wakely  <jwakely@redhat.com>
 587
 588         * testsuite/experimental/filesystem/path/native/conv_c++23.cc:
 589         Add dg-require-filesystem-ts directive.
 590
 591 2021-06-14  Jonathan Wakely  <jwakely@redhat.com>
 592
 593         PR libstdc++/101034
 594         * include/std/any (any(in_place_t<T>, initializer_list<U>, A&&...))
 595         (any::emplace<T>(initializer_list<U>, A&&...)): Fix constraint
 596         to use lvalue.
 597         * testsuite/20_util/any/cons/101034.cc: New test.
 598
 599 2021-06-14  Jonathan Wakely  <jwakely@redhat.com>
 600
 601         * testsuite/17_intro/headers/c++2017/all_attributes.cc: Add
 602         -std=gnu++17 option.
 603
 604 2021-06-14  Jonathan Wakely  <jwakely@redhat.com>
 605
 606         PR libstdc++/101056
 607         * libsupc++/compare (compare_partial_order_fallback): Add
 608         constraint using reversed parameter order, as per LWG 3465.
 609         * testsuite/18_support/comparisons/algorithms/fallback.cc:
 610         Adjust expected result.
 611
 612 2021-06-14  Jonathan Wakely  <jwakely@redhat.com>
 613
 614         * libsupc++/compare (__decayed_same_as): New helper concept.
 615         (strong_order, weak_order, partial_order): Constrain with new
 616         concept instead of using static_assert.
 617         (compare_strong_order_fallback, compare_weak_order_fallback)
 618         (compare_partial_order_fallback): Likewise. Do not deduce return
 619         types. Remove redundant if-constexpr checks.
 620         * testsuite/18_support/comparisons/algorithms/fallback.cc: New test.
 621
 622 2021-06-14  Jonathan Wakely  <jwakely@redhat.com>
 623
 624         PR libstdc++/101055
 625         * include/std/tuple: Use reserved form of attribute name.
 626         * testsuite/17_intro/headers/c++2011/all_attributes.cc: Add
 627         check for no_unique_address.
 628         * testsuite/17_intro/headers/c++2014/all_attributes.cc:
 629         Likewise.
 630         * testsuite/17_intro/headers/c++2017/all_attributes.cc:
 631         Likewise.
 632
 633 2021-06-11  Jonathan Wakely  <jwakely@redhat.com>
 634
 635         * include/bits/fs_path.h (operator==, operator<=>): Use new
 636         _S_compare function.
 637         (path::_S_compare): New function to call path::compare in a
 638         context where path::iterator is complete.
 639         * include/experimental/bits/fs_path.h (operator<, operator==):
 640         Define after path::iterator is complete.
 641         * testsuite/27_io/filesystem/path/native/conv_c++23.cc: New
 642         test.
 643         * testsuite/experimental/filesystem/path/native/conv_c++23.cc:
 644         New test.
 645
 646 2021-06-09  Thomas Rodgers  <rodgert@appliantology.com>
 647
 648         * testsuite/29_atomics/atomic_ref/wait_notify.cc: Guard
 649         test logic with constexpr check for is_always_lock_free.
 650
 651 2021-06-09  Jonathan Wakely  <jwakely@redhat.com>
 652
 653         PR libstdc++/100982
 654         * include/std/optional (optional::operator=(const optional<U>&)):
 655         Fix value category used in is_assignable check.
 656         * testsuite/20_util/optional/assignment/100982.cc: New test.
 657
 658 2021-06-09  Jonathan Wakely  <jwakely@redhat.com>
 659
 660         * include/bits/allocator.h (allocator::is_always_equal): Deprecate.
 661         * include/bits/iterator_concepts.h (indirectly_readable_traits):
 662         Add LWG issue number to comment.
 663         * include/std/memory_resource (polymorphic_allocator::release):
 664         Deprecate.
 665         * testsuite/20_util/allocator/requirements/typedefs.cc: Add
 666         dg-warning for deprecation. Also check std::allocator<void>.
 667
 668 2021-06-08  Thomas Rodgers  <rodgert@appliantology.com>
 669
 670         PR libstdc++/100889
 671         * include/bits/atomic_base.h (atomic_ref<_Tp*>::wait):
 672         Change parameter type from _Tp to _Tp*.
 673         * testsuite/29_atomics/atomic_ref/wait_notify.cc: Extend
 674         coverage of types tested.
 675
 676 2021-06-08  Thomas Rodgers  <rodgert@appliantology.com>
 677
 678         * include/std/barrier (__tree_barrier::_M_arrive): Remove
 679         unnecessary hasher instantiation.
 680
 681 2021-06-08  Jonathan Wakely  <jwakely@redhat.com>
 682
 683         * include/experimental/propagate_const (swap): Constrain.
 684         * testsuite/experimental/propagate_const/swap/lwg3413.cc: New test.
 685
 686 2021-06-07  Avi Kivity  <avi@scylladb.com>
 687
 688         PR libstdc++/100900
 689         * include/std/ranges (elements_view::__iter_cat::_S_iter_cat):
 690         Add missing typename.
 691
 692 2021-06-07  Jonathan Wakely  <jwakely@redhat.com>
 693
 694         PR libstdc++/98842
 695         * include/std/optional (operator<=>(const optional<T>& const U&)):
 696         Add missing constraint and add workaround for template
 697         recursion.
 698         * testsuite/20_util/optional/relops/three_way.cc: Check that
 699         type without equality comparison cannot be compared when wrapped
 700         in std::optional.
 701
 702 2021-06-05  Jonathan Wakely  <jwakely@redhat.com>
 703
 704         PR libstdc++/100824
 705         * include/bits/ranges_base.h (_SSize): Return signed type.
 706         * testsuite/std/ranges/access/ssize.cc: Check with __int128.
 707
 708 2021-06-04  Jonathan Wakely  <jwakely@redhat.com>
 709
 710         * include/bits/ranges_base.h (_SSize): Return the result of
 711         ranges::size converted to the wider of make-signed-like-t<S> and
 712         ptrdiff_t, rather than the ranges different type.
 713         * testsuite/std/ranges/access/ssize.cc: Adjust expected result
 714         for an iota_view that uses an integer class type for its
 715         difference_type.
 716
 717 2021-06-04  Jonathan Wakely  <jwakely@redhat.com>
 718
 719         PR libstdc++/100824
 720         * include/bits/ranges_base.h (__member_data): Use __decay_copy.
 721         * testsuite/std/ranges/access/data.cc: Add testcase from PR.
 722
 723 2021-06-04  Jonathan Wakely  <jwakely@redhat.com>
 724
 725         PR libstdc++/100824
 726         * include/bits/iterator_concepts.h (__detail::__decay_copy)
 727         (__detail::__member_begin, __detail::__adl_begin): Move to
 728         namespace ranges::__cust_access.
 729         (__detail::__ranges_begin): Likewise, and rename to __begin.
 730         Remove redundant static assertion.
 731         * include/bits/ranges_base.h (_Begin, _End, _RBegin, _REnd):
 732         Use lvalue in noexcept specifier.
 733         (__as_const): Add non-deduced parameter for value category.
 734         (_CBegin, _CEnd, _CRBegin, _CREnd, _CData): Adjust uses of
 735         __as_const.
 736         (__member_size, __adl_size, __member_empty, __size0_empty):
 737         (__eq_iter_empty, __adl_data): Use lvalue objects in
 738         requirements.
 739         (__sentinel_size): Likewise. Add check for conversion to
 740         unsigned-like.
 741         (__member_data): Allow non-lvalue types to satisfy the concept,
 742         but use lvalue object in requirements.
 743         (_Size, _SSize): Remove forwarding to always use an lvalue.
 744         (_Data): Likewise. Add static assertion for arrays.
 745         * testsuite/std/ranges/access/cdata.cc: Adjust expected
 746         behaviour for rvalues. Add negative tests for ill-formed
 747         expressions.
 748         * testsuite/std/ranges/access/data.cc: Likewise.
 749         * testsuite/std/ranges/access/empty.cc: Adjust expected
 750         behaviour for rvalues.
 751         * testsuite/std/ranges/access/size.cc: Likewise.
 752
 753 2021-06-04  Tim Adye  <Tim.Adye@cern.ch>
 754
 755         * include/std/any (any::_Manager::_S_access): New static
 756         function to access the contained value.
 757         (any::emplace, __any_caster): Use _S_access member of the
 758         manager type.
 759
 760 2021-06-04  Jonathan Wakely  <jwakely@redhat.com>
 761
 762         * doc/xml/manual/status_cxx2020.xml:
 763         * doc/html/*: Regenerate.
 764         * include/bits/hashtable.h (__cpp_lib_generic_unordered_lookup):
 765         Define.
 766         * include/std/version (__cpp_lib_generic_unordered_lookup):
 767         Define.
 768         * testsuite/23_containers/unordered_map/operations/1.cc: Check
 769         feature test macro.
 770         * testsuite/23_containers/unordered_set/operations/1.cc:
 771         Likewise.
 772
 773 2021-06-03  Patrick Palka  <ppalka@redhat.com>
 774
 775         * include/bits/ranges_algo.h (__detail::__can_reread_output):
 776         Factor out this concept from ...
 777         (__unique_copy_fn::operator()): ... here.  Use the concept
 778         throughout.
 779         * testsuite/std/ranges/range.cc: Remove now ill-formed use
 780         of range_value_t on an output_range.
 781         * testsuite/util/testsuite_iterators.h (output_iterator_wrapper):
 782         Define value_type, pointer and reference member types to void.
 783
 784 2021-06-03  Patrick Palka  <ppalka@redhat.com>
 785
 786         PR libstdc++/100577
 787         * include/std/ranges (_RangeAdaptorClosure): Document
 788         _S_has_simple_call_op mechanism.
 789         (_RangeAdaptor): Document _S_has_simple_extra_args mechanism.
 790         (__closure_has_simple_call_op): New concept.
 791         (__adaptor_has_simple_extra_args): Likewise.
 792         (_Partial<_Adaptor, _Args...>): New partial specialization.
 793         (_Partial<_Adaptor, _Arg>): Likewise.
 794         (_Pipe<_Lhs, _Rhs>): Likewise.
 795         (views::_All::_S_has_simple_call_op): Define to true.
 796         (views::_Filter::_S_has_simple_extra_args): Likewise.
 797         (views::_Transform::_S_has_simple_extra_args): Likewise.
 798         (views::_Take::_S_has_simple_extra_args): Likewise.
 799         (views::_TakeWhile::_S_has_simple_extra_args): Likewise.
 800         (views::_Drop::_S_has_simple_extra_args): Likewise.
 801         (views::_DropWhile::_S_has_simple_extra_args): Likewise.
 802         (views::_Join::_S_has_simple_call_op): Likewise.
 803         (views::_Split): Document why we don't define
 804         _S_has_simple_extra_args to true for this adaptor.
 805         (views::_Common::_S_has_simple_call_op): Define to true.
 806         (views::_Reverse::_S_has_simple_call_op): Likewise.
 807         (views::_Elements::_S_has_simple_call_op): Likewise.
 808         * testsuite/std/ranges/adaptors/100577.cc: New test.
 809
 810 2021-06-02  Jonathan Wakely  <jwakely@redhat.com>
 811
 812         PR libstdc++/100863
 813         PR libstdc++/65816
 814         * include/bits/hashtable_policy.h (_Hashtable_ebo_helper):
 815         Value-initialize subobject.
 816         * testsuite/23_containers/unordered_map/allocator/default_init.cc:
 817         Remove XFAIL.
 818         * testsuite/23_containers/unordered_set/allocator/default_init.cc:
 819         Remove XFAIL.
 820
 821 2021-06-02  Jonathan Wakely  <jwakely@redhat.com>
 822
 823         PR libstdc++/96088
 824         * testsuite/23_containers/unordered_map/96088.cc: Adjust
 825         expected number of allocations.
 826         * testsuite/23_containers/unordered_set/96088.cc: Likewise.
 827
 828 2021-06-02  Jonathan Wakely  <jwakely@redhat.com>
 829
 830         * doc/xml/manual/status_cxxis29124.xml: Improve punctuation.
 831         * doc/xml/manual/status_cxxtr1.xml: Likewise.
 832         * doc/xml/manual/status_cxxtr24733.xml: Likewise.
 833         * doc/html/*: Regenerate.
 834
 835 2021-06-01  Patrick Palka  <ppalka@redhat.com>
 836
 837         PR c++/65816
 838         * testsuite/23_containers/deque/allocator/default_init.cc,
 839         testsuite/23_containers/forward_list/allocator/default_init.cc,
 840         testsuite/23_containers/list/allocator/default_init.cc,
 841         testsuite/23_containers/map/allocator/default_init.cc,
 842         testsuite/23_containers/set/allocator/default_init.cc,
 843         testsuite/23_containers/vector/allocator/default_init.cc,
 844         testsuite/23_containers/vector/bool/allocator/default_init.cc:
 845         Remove xfail.
 846
 847 2021-06-01  Jonathan Wakely  <jwakely@redhat.com>
 848
 849         * testsuite/23_containers/unordered_map/96088.cc: Change
 850         effective target to c++17.
 851         * testsuite/23_containers/unordered_set/96088.cc: Likewise.
 852
 853 2021-06-01  Jonathan Wakely  <jwakely@redhat.com>
 854
 855         * testsuite/22_locale/ctype/is/string/89728_neg.cc: Only test
 856         isblank for C++11 and later.
 857
 858 2021-06-01  Jonathan Wakely  <jwakely@redhat.com>
 859
 860         PR libstdc++/100833
 861         * include/bits/ranges_base.h (ranges::advance(iter, n, sentinel)):
 862         Fix return value for no-op case.
 863         * testsuite/24_iterators/range_operations/advance.cc: Test
 864         return values of three-argument overload.
 865
 866 2021-06-01  Jonathan Wakely  <jwakely@redhat.com>
 867
 868         PR libstdc++/99453
 869         * python/Makefile.am: Use archive name for printer hook if no
 870         dynamic library name is available.
 871         * python/Makefile.in: Regenerate.
 872
 873 2021-05-30  Gerald Pfeifer  <gerald@pfeifer.com>
 874
 875         * doc/xml/manual/abi.xml: Remove dead reference to "Intel
 876         Compilers for Linux: Compatibility with GNU Compilers" article.
 877         * doc/html/manual/abi.html: Regenerate.
 878
 879 2021-05-26  François Dumont  <fdumont@gcc.gnu.org>
 880
 881         * include/debug/formatter.h
 882         (_Error_formatter::_Parameter::_Named): New.
 883         (_Error_formatter::_Parameter::_Type): Inherit latter.
 884         (_Error_formatter::_Parameter::_M_integer): Likewise.
 885         (_Error_formatter::_Parameter::_M_string): Likewise.
 886         * src/c++11/debug.cc: Include <cstring>.
 887         (_Print_func_t): New.
 888         (print_raw(PrintContext&, const char*, ptrdiff_t)): New.
 889         (print_word): Use '%.*s' format in fprintf to render only expected number of chars.
 890         (pretty_print(PrintContext&, const char*, _Print_func_t)): New.
 891         (print_type): Rename in...
 892         (print_type_info): ...this. Use pretty_print.
 893         (print_address, print_integer): New.
 894         (print_named_name, print_iterator_constness, print_iterator_state): New.
 895         (print_iterator_seq_type): New.
 896         (print_named_field, print_type_field, print_instance_field, print_iterator_field): New.
 897         (print_field): Use latters.
 898         (print_quoted_named_name, print_type_type, print_type, print_instance): New.
 899         (print_string(PrintContext&, const char*, const _Parameter*, size_t)):
 900         Change signature to...
 901         (print_string(PrintContext&, const char*, ptrdiff_t, const _Parameter*, size_t)):
 902         ...this and adapt. Remove intermediate buffer to render input string.
 903         (print_string(PrintContext&, const char*, ptrdiff_t)): New.
 904
 905 2021-05-26  Jonathan Wakely  <jwakely@redhat.com>
 906
 907         PR libstdc++/100768
 908         * include/bits/ranges_base.h (advance, distance, next, prev):
 909         Replace function templates with function objects.
 910         * testsuite/24_iterators/headers/iterator/synopsis_c++20.cc:
 911         Adjust for changes to function objects.
 912         * testsuite/std/ranges/adaptors/elements.cc: Add using
 913         declarations for names from namespace ranges.
 914         * testsuite/std/ranges/adaptors/transform.cc: Likewise.
 915         * testsuite/24_iterators/range_operations/100768.cc: New test.
 916
 917 2021-05-24  François Dumont  <fdumont@gcc.gnu.org>
 918
 919         PR libstdc++/96088
 920         * include/bits/hashtable_policy.h (_Select2nd): New.
 921         (_NodeBuilder<>): New.
 922         (_ReuseOrAllocNode<>::operator()): Use variadic template args.
 923         (_AllocNode<>::operator()): Likewise.
 924         * include/bits/hashtable.h
 925         (_Hashtable<>::__node_builder_t): New.
 926         (_Hashtable<>::_M_insert_unique<>(_Kt&&, _Arg&&, const _NodeGenerator&)):
 927          New.
 928         (_Hashtable<>::_S_forward_key): New.
 929         (_Hashtable<>::_M_insert): Use latter.
 930         (_Hashtable<>::_M_insert(const_iterator, _Arg&&, const _NodeGenerator&, false_type)):
 931         Instantiate node first, compute hash code second.
 932         * testsuite/23_containers/unordered_map/96088.cc: New test.
 933         * testsuite/23_containers/unordered_multimap/96088.cc: New test.
 934         * testsuite/23_containers/unordered_multiset/96088.cc: New test.
 935         * testsuite/23_containers/unordered_set/96088.cc: New test.
 936         * testsuite/util/replacement_memory_operators.h
 937         (counter::_M_increment): New.
 938         (counter::_M_decrement): New.
 939         (counter::reset()): New.
 940
 941 2021-05-24  Patrick Palka  <ppalka@redhat.com>
 942
 943         PR libstdc++/100479
 944         * include/std/ranges (__detail::__non_propagating_cache): Move
 945         definition up to before that of _CachedPosition.  Make base
 946         class _Optional_base protected instead of private.  Add const
 947         overload for operator*.
 948         (__detail::_CachedPosition): Rewrite the partial specialization
 949         for forward ranges as a derived class of __non_propagating_cache.
 950         Remove the size constraint on the partial specialization for
 951         random access ranges.  Add copy/move/copy-assignment/move-assignment
 952         members to the offset partial specialization for random
 953         access ranges that propagate the cached value but additionally
 954         invalidate it in the source object on move.
 955         * testsuite/std/ranges/adaptors/100479.cc: New test.
 956
 957 2021-05-24  Jonathan Wakely  <jwakely@redhat.com>
 958
 959         * testsuite/25_algorithms/inplace_merge/constrained.cc: Qualify
 960         call to ranges::next.
 961         * testsuite/25_algorithms/is_sorted/constrained.cc: Likewise.
 962         * testsuite/25_algorithms/is_sorted_until/constrained.cc:
 963         Likewise.
 964         * testsuite/25_algorithms/swap_ranges/1.cc: Qualify call to
 965         swap_ranges.
 966
 967 2021-05-21  Patrick Palka  <ppalka@redhat.com>
 968
 969         PR libstdc++/100606
 970         * include/std/ranges (drop_while_view::begin): Assert the
 971         precondition added by LWG 3490.
 972
 973 2021-05-21  Patrick Palka  <ppalka@redhat.com>
 974
 975         PR libstdc++/100690
 976         * include/std/ranges (iota_view::_Sentinel::_M_distance_from):
 977         Split out this member function from ...
 978         (iota_view::_Sentinel::operator-): ... here, for sake of access
 979         control.
 980         * testsuite/std/ranges/iota/iota_view.cc (test05): New test.
 981
 982 2021-05-20  Jonathan Wakely  <jwakely@redhat.com>
 983
 984         * include/bits/random.tcc (__representable_as_double)
 985         (__p1_representable_as_double): Add "" to static asserts.
 986
 987 2021-05-20  Jonathan Wakely  <jwakely@redhat.com>
 988
 989         PR libstdc++/100676
 990         * include/bits/c++config (__glibcxx_assert_1): Rename to ...
 991         (__glibcxx_constexpr_assert): ... this.
 992         (__glibcxx_assert_impl): Use __glibcxx_constexpr_assert.
 993         (__glibcxx_assert): Define as either __glibcxx_constexpr_assert
 994         or __glibcxx_assert_impl.
 995         (__glibcxx_assert_2): Remove
 996         * include/debug/macros.h (_GLIBCXX_DEBUG_VERIFY_AT_F): Use
 997         __glibcxx_constexpr_assert instead of __glibcxx_assert_1.
 998         * testsuite/21_strings/basic_string_view/element_access/char/back_constexpr_neg.cc:
 999         Adjust expected error.
1000         * testsuite/21_strings/basic_string_view/element_access/char/constexpr_neg.cc:
1001         Likewise.
1002         * testsuite/21_strings/basic_string_view/element_access/char/front_constexpr_neg.cc:
1003         Likewise.
1004         Likewise.
1005         * testsuite/21_strings/basic_string_view/element_access/wchar_t/back_constexpr_neg.cc:
1006         Likewise.
1007         * testsuite/21_strings/basic_string_view/element_access/wchar_t/constexpr_neg.cc:
1008         Likewise.
1009         * testsuite/21_strings/basic_string_view/element_access/wchar_t/front_constexpr_neg.cc:
1010         Likewise.
1011         * testsuite/23_containers/span/back_neg.cc: Likewise.
1012         * testsuite/23_containers/span/front_neg.cc: Likewise.
1013         * testsuite/23_containers/span/index_op_neg.cc: Likewise.
1014
1015 2021-05-20  Patrick Palka  <ppalka@redhat.com>
1016
1017         PR libstdc++/100639
1018         * include/bits/stl_iterator.h (reverse_iterator::difference_type):
1019         In C++20 mode, define in terms of iter_difference_t as per P0896R4.
1020         (reverse_iterator::reference): Likewise, but with iter_reference_t.
1021         (reverse_iterator::value_type): Likewise, but with iter_value_t.
1022         * testsuite/std/ranges/adaptors/reverse.cc (test08): New test.
1023         * testsuite/24_iterators/reverse_iterator/100639.cc: New test.
1024
1025 2021-05-20  Joern Rennecke  <joern.rennecke@riscy-ip.com>
1026
1027         PR libstdc++/100361
1028         * include/std/charconv (to_chars): Hide the overloads for
1029         floating-point types for 16 bit targets.
1030         * src/c++17/floating_to_chars.cc: Don't compile for 16 bit targets.
1031         * testsuite/20_util/to_chars/double.cc: Run this test only on
1032         size32plus targets.
1033         * testsuite/20_util/to_chars/float.cc: Likewise.
1034         * testsuite/20_util/to_chars/long_double.cc: Likewise.
1035
1036 2021-05-18  Patrick Palka  <ppalka@redhat.com>
1037
1038         PR libstdc++/100631
1039         * include/std/ranges (elements_view::_Sentinel::operator-): Use
1040         _M_distance_from in the other operator- overload too.
1041         * testsuite/std/ranges/adaptors/elements.cc (test06): Augment test.
1042
1043 2021-05-18  Thomas Schwinge  <thomas@codesourcery.com>
1044
1045         * testsuite/lib/prune.exp: Add note about 'dg-note'.
1046
1047 2021-05-18  Patrick Palka  <ppalka@redhat.com>
1048
1049         PR libstdc++/100475
1050         * include/std/ranges (__box::__box): Use non-list-initialization
1051         in member initializer list of in-place constructor of the
1052         partial specialization for semiregular types.
1053         (__box::operator->): Use std::__addressof.
1054         * testsuite/std/ranges/adaptors/detail/semiregular_box.cc
1055         (test02): New test.
1056         * testsuite/std/ranges/single_view.cc (test04): New test.
1057
1058 2021-05-18  Patrick Palka  <ppalka@redhat.com>
1059
1060         PR libstdc++/100621
1061         * include/std/ranges (reverse_view::_S_needs_cached_begin):
1062         Set to true if the underlying non-common random-access range
1063         doesn't have a sized sentinel.
1064
1065 2021-05-18  Patrick Palka  <ppalka@redhat.com>
1066
1067         PR libstdc++/100631
1068         * include/std/ranges (elements_view::_Iterator): Also befriend
1069         _Sentinel<!_Const>.
1070         (elements_view::_Sentinel::_M_equal): Templatize.
1071         (elements_view::_Sentinel::_M_distance_from): Split out from ...
1072         (elements_view::_Sentinel::operator-): ... here.  Depend on
1073         _Base2 instead of _Base in the return type.
1074         * testsuite/std/ranges/adaptors/elements.cc (test06, test07):
1075         New tests.
1076
1077 2021-05-17  Thomas Rodgers  <rodgert@twrodgers.com>
1078
1079         * include/bits/atomic_wait.h (__waiter::_M_do_wait_v): loop
1080         until value change observed.
1081         (__waiter_base::_M_laundered): New member.
1082         (__waiter_base::_M_notify): Check _M_laundered to determine
1083         whether to wake one or all.
1084         (__detail::__atomic_compare): Return true if call to
1085         __builtin_memcmp() == 0.
1086         (__waiter_base::_S_do_spin_v): Adjust predicate.
1087         * testsuite/29_atomics/atomic/wait_notify/100334.cc: New
1088         test.
1089
1090 2021-05-17  Jonathan Wakely  <jwakely@redhat.com>
1091
1092         PR libstdc++/100630
1093         * include/experimental/bits/fs_path.h (__is_constructible_from):
1094         Test construction from a const lvalue, not an rvalue.
1095         * testsuite/27_io/filesystem/path/construct/100630.cc: New test.
1096         * testsuite/experimental/filesystem/path/construct/100630.cc:
1097         New test.
1098
1099 2021-05-17  Antony Polukhin  <antoshkka@gmail.com>
1100
1101         PR libstdc++/89728
1102         * include/bits/locale_facets.h (ctype<basic_string<C,T,A>>):
1103         Declare (but do not define) partial specialization.
1104         * testsuite/22_locale/ctype/is/string/89728_neg.cc: New test.
1105
1106 2021-05-17  Jonathan Wakely  <jwakely@redhat.com>
1107
1108         * include/std/thread (jthread::_S_create): Fix static assert
1109         message.
1110         * testsuite/30_threads/jthread/95989.cc: Re-enable test.
1111         * testsuite/30_threads/jthread/jthread.cc: Do not require
1112         pthread effective target.
1113         * testsuite/30_threads/jthread/2.cc: Moved to...
1114         * testsuite/30_threads/jthread/version.cc: ...here.
1115
1116 2021-05-17  Jonathan Wakely  <jwakely@redhat.com>
1117
1118         * doc/Makefile.am: Simplify doxygen recipes and use --latex_cmd.
1119         * doc/Makefile.in: Regenerate.
1120         * doc/doxygen/user.cfg.in (LATEX_CMD_NAME): Add placeholder
1121         value.
1122         * scripts/run_doxygen (print_usage): Always print to stdout and
1123         do not exit.
1124         (fail): New function for exiting on error.
1125         (parse_options): Handle --latex_cmd. Do not treat --help the
1126         same as errors. Simplify handling of required arguments.
1127
1128 2021-05-12  Jonathan Wakely  <jwakely@redhat.com>
1129
1130         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_end.cc:
1131         Increase dg-timeout-factor to 4. Fix -Wunused-parameter
1132         warnings. Replace bitwise AND with logical AND in loop
1133         condition.
1134         * testsuite/25_algorithms/pstl/alg_nonmodifying/search_n.cc:
1135         Replace bitwise AND with logical AND in loop condition.
1136         * testsuite/util/pstl/test_utils.h: Remove unused parameter
1137         names.
1138
1139 2021-05-11  Patrick Palka  <ppalka@redhat.com>
1140
1141         * src/c++17/ryu/LOCAL_PATCHES: Update.
1142         * src/c++17/ryu/ryu_generic_128.h: Remove extern "C".
1143         Remove declarations for never-defined functions.
1144         * testsuite/20_util/to_chars/4.cc: New test.
1145
1146 2021-05-11  Jonathan Wakely  <jwakely@redhat.com>
1147
1148         * testsuite/20_util/headers/memory/synopsis.cc: Define C++98
1149         alternative for macro.
1150         * testsuite/20_util/shared_ptr/creation/99006.cc: Add effective
1151         target keyword.
1152         * testsuite/25_algorithms/copy/debug/99402.cc: Avoid C++11
1153         syntax.
1154
1155 2021-05-11  Jonathan Wakely  <jwakely@redhat.com>
1156
1157         * include/bits/allocator.h (allocator<void>) [C++20]: Add
1158         missing noexcept to constructor. Restore missing POCMA and
1159         is_always_equal_traits.
1160         [C++17]: Make construct and destroy members private and
1161         declare allocator_traits as a friend.
1162         * include/bits/memoryfwd.h (allocator_traits): Declare.
1163         * include/ext/malloc_allocator.h (malloc_allocator::allocate):
1164         Add nodiscard attribute. Add static assertion for LWG 3307.
1165         * include/ext/new_allocator.h (new_allocator::allocate): Add
1166         static assertion for LWG 3307.
1167         * testsuite/20_util/allocator/void.cc: Check that converting
1168         constructor is noexcept. Check for propagation traits and
1169         size_type and difference_type. Check that pointer and
1170         const_pointer are gone in C++20.
1171
1172 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
1173
1174         * include/std/stop_token: Remove TODO comment.
1175
1176 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
1177
1178         * include/bits/shared_ptr_base.h (__shared_count(unique_ptr&&)):
1179         Initialize a non-reference deleter from an rvalue, as per LWG
1180         3548.
1181         (__shared_ptr::_UniqCompatible): Add missing constraint.
1182         * testsuite/20_util/shared_ptr/cons/lwg3548.cc: New test.
1183         * testsuite/20_util/shared_ptr/cons/unique_ptr_deleter.cc: Check
1184         constraints.
1185
1186 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
1187
1188         * testsuite/17_intro/headers/c++2017/all_attributes.cc: Remove
1189         -std=gnu++17 from dg-options directive.
1190         * testsuite/17_intro/headers/c++2017/all_no_exceptions.cc:
1191         Likewise.
1192         * testsuite/17_intro/headers/c++2017/all_pedantic_errors.cc:
1193         Likewise.
1194         * testsuite/17_intro/headers/c++2017/operator_names.cc:
1195         Likewise.
1196         * testsuite/17_intro/headers/c++2017/parallel_mode.cc: Likewise.
1197         * testsuite/17_intro/headers/c++2017/stdc++.cc: Likewise.
1198         * testsuite/17_intro/headers/c++2017/stdc++_multiple_inclusion.cc:
1199         Likewise.
1200         * testsuite/18_support/aligned_alloc/aligned_alloc.cc: Likewise.
1201         * testsuite/18_support/byte/81076.cc: Likewise.
1202         * testsuite/18_support/byte/global_neg.cc: Likewise.
1203         * testsuite/18_support/byte/ops.cc: Likewise.
1204         * testsuite/18_support/byte/requirements.cc: Likewise.
1205         * testsuite/18_support/headers/cfloat/values_c++17.cc: Likewise.
1206         * testsuite/18_support/launder/1.cc: Likewise.
1207         * testsuite/18_support/launder/nodiscard.cc: Likewise.
1208         * testsuite/18_support/launder/requirements.cc: Likewise.
1209         * testsuite/18_support/launder/requirements_neg.cc: Likewise.
1210         * testsuite/18_support/new_aligned.cc: Likewise.
1211         * testsuite/18_support/uncaught_exceptions/uncaught_exceptions.cc:
1212         Likewise.
1213         * testsuite/19_diagnostics/error_code/is_error_code_v.cc:
1214         Likewise.
1215         * testsuite/19_diagnostics/error_condition/hash.cc: Likewise.
1216         * testsuite/20_util/addressof/requirements/constexpr.cc:
1217         Likewise.
1218         * testsuite/20_util/as_const/1.cc: Likewise.
1219         * testsuite/20_util/as_const/rvalue_neg.cc: Likewise.
1220         * testsuite/20_util/bind/83427.cc: Likewise.
1221         * testsuite/20_util/bind/is_placeholder_v.cc: Likewise.
1222         * testsuite/20_util/bool_constant/requirements.cc: Likewise.
1223         * testsuite/20_util/duration/arithmetic/constexpr_c++17.cc:
1224         Likewise.
1225         * testsuite/20_util/duration/requirements/treat_as_floating_point_v.cc:
1226         Likewise.
1227         * testsuite/20_util/duration_cast/rounding.cc: Likewise.
1228         * testsuite/20_util/enable_shared_from_this/members/weak_from_this.cc:
1229         Likewise.
1230         * testsuite/20_util/from_chars/1_neg.cc: Likewise.
1231         * testsuite/20_util/from_chars/requirements.cc: Likewise.
1232         * testsuite/20_util/function/91456.cc: Likewise.
1233         * testsuite/20_util/function/cons/deduction.cc: Likewise.
1234         * testsuite/20_util/function_objects/83607.cc: Likewise.
1235         * testsuite/20_util/function_objects/invoke/59768.cc: Likewise.
1236         * testsuite/20_util/function_objects/mem_fn/80478.cc: Likewise.
1237         * testsuite/20_util/function_objects/not_fn/1.cc: Likewise.
1238         * testsuite/20_util/function_objects/not_fn/87538.cc: Likewise.
1239         * testsuite/20_util/has_unique_object_representations/requirements/explicit_instantiation.cc:
1240         Likewise.
1241         * testsuite/20_util/has_unique_object_representations/requirements/typedefs.cc:
1242         Likewise.
1243         * testsuite/20_util/has_unique_object_representations/value.cc:
1244         Likewise.
1245         * testsuite/20_util/hash/nullptr.cc: Likewise.
1246         * testsuite/20_util/in_place/requirements.cc: Likewise.
1247         * testsuite/20_util/is_aggregate/incomplete_neg.cc: Likewise.
1248         * testsuite/20_util/is_aggregate/requirements/explicit_instantiation.cc:
1249         Likewise.
1250         * testsuite/20_util/is_aggregate/requirements/typedefs.cc:
1251         Likewise.
1252         * testsuite/20_util/is_aggregate/value.cc: Likewise.
1253         * testsuite/20_util/is_invocable/83395.cc: Likewise.
1254         * testsuite/20_util/is_invocable/91456.cc: Likewise.
1255         * testsuite/20_util/is_invocable/requirements/explicit_instantiation.cc:
1256         Likewise.
1257         * testsuite/20_util/is_invocable/requirements/typedefs.cc:
1258         Likewise.
1259         * testsuite/20_util/is_invocable/value.cc: Likewise.
1260         * testsuite/20_util/is_literal_type/deprecated-1z.cc: Likewise.
1261         * testsuite/20_util/is_nothrow_constructible/94003.cc: Likewise.
1262         * testsuite/20_util/is_nothrow_invocable/83395.cc: Likewise.
1263         * testsuite/20_util/is_nothrow_invocable/requirements/explicit_instantiation.cc:
1264         Likewise.
1265         * testsuite/20_util/is_nothrow_invocable/requirements/typedefs.cc: Likewise.
1266         * testsuite/20_util/is_nothrow_invocable/value.cc: Likewise.
1267         * testsuite/20_util/is_nothrow_swappable/requirements/explicit_instantiation.cc:
1268         Likewise.
1269         * testsuite/20_util/is_nothrow_swappable/requirements/typedefs.cc:
1270         Likewise.
1271         * testsuite/20_util/is_nothrow_swappable/value.cc: Likewise.
1272         * testsuite/20_util/is_nothrow_swappable_with/requirements/explicit_instantiation.cc:
1273         Likewise.
1274         * testsuite/20_util/is_nothrow_swappable_with/requirements/typedefs.cc:
1275         Likewise.
1276         * testsuite/20_util/is_nothrow_swappable_with/value.cc:
1277         Likewise.
1278         * testsuite/20_util/is_swappable/requirements/explicit_instantiation.cc:
1279         Likewise.
1280         * testsuite/20_util/is_swappable/requirements/typedefs.cc:
1281         Likewise.
1282         * testsuite/20_util/is_swappable/value.cc: Likewise.
1283         * testsuite/20_util/is_swappable_with/requirements/explicit_instantiation.cc:
1284         Likewise.
1285         * testsuite/20_util/is_swappable_with/requirements/typedefs.cc:
1286         Likewise.
1287         * testsuite/20_util/is_swappable_with/value.cc: Likewise.
1288         * testsuite/20_util/logical_traits/83134.cc: Likewise.
1289         * testsuite/20_util/logical_traits/requirements/explicit_instantiation.cc:
1290         Likewise.
1291         * testsuite/20_util/logical_traits/requirements/typedefs.cc:
1292         Likewise.
1293         * testsuite/20_util/logical_traits/value.cc: Likewise.
1294         * testsuite/20_util/pair/cons/deduction.cc: Likewise.
1295         * testsuite/20_util/pair/swap_cxx17.cc: Likewise.
1296         * testsuite/20_util/ratio/requirements/ratio_equal_v.cc:
1297         Likewise.
1298         * testsuite/20_util/reference_wrapper/83427.cc: Likewise.
1299         * testsuite/20_util/reference_wrapper/deduction.cc: Likewise.
1300         * testsuite/20_util/shared_ptr/casts/reinterpret.cc: Likewise.
1301         * testsuite/20_util/shared_ptr/cons/deduction.cc: Likewise.
1302         * testsuite/20_util/shared_ptr/requirements/weak_type.cc:
1303         Likewise.
1304         * testsuite/20_util/time_point/arithmetic/constexpr.cc:
1305         Likewise.
1306         * testsuite/20_util/time_point_cast/rounding.cc: Likewise.
1307         * testsuite/20_util/to_chars/3.cc: Likewise.
1308         * testsuite/20_util/to_chars/chars_format.cc: Likewise.
1309         * testsuite/20_util/to_chars/lwg3266.cc: Likewise.
1310         * testsuite/20_util/to_chars/requirements.cc: Likewise.
1311         * testsuite/20_util/tuple/78939.cc: Likewise.
1312         * testsuite/20_util/tuple/apply/1.cc: Likewise.
1313         * testsuite/20_util/tuple/apply/2.cc: Likewise.
1314         * testsuite/20_util/tuple/cons/deduction.cc: Likewise.
1315         * testsuite/20_util/tuple/make_from_tuple/1.cc: Likewise.
1316         * testsuite/20_util/tuple/make_from_tuple/2.cc: Likewise.
1317         * testsuite/20_util/tuple/swap_cxx17.cc: Likewise.
1318         * testsuite/20_util/tuple/tuple_size_v.cc: Likewise.
1319         * testsuite/20_util/unique_ptr/cons/deduction_neg.cc: Likewise.
1320         * testsuite/20_util/uses_allocator/requirements/uses_allocator_v.cc:
1321         Likewise.
1322         * testsuite/20_util/variable_templates_for_traits.cc: Likewise.
1323         * testsuite/20_util/void_t/1.cc: Likewise.
1324         * testsuite/20_util/weak_ptr/cons/deduction.cc: Likewise.
1325         * testsuite/24_iterators/container_access.cc: Likewise.
1326         * testsuite/24_iterators/headers/iterator/range_access_c++17.cc:
1327         Likewise.
1328         * testsuite/24_iterators/headers/iterator/synopsis_c++17.cc:
1329         Likewise.
1330         * testsuite/24_iterators/range_access/range_access_cpp17.cc:
1331         Likewise.
1332         * testsuite/24_iterators/range_access/range_access_cpp17_neg.cc:
1333         Likewise.
1334         * testsuite/26_numerics/gcd/gcd_neg.cc: Likewise.
1335         * testsuite/26_numerics/headers/cmath/functions_std_c++17.cc:
1336         Likewise.
1337         * testsuite/26_numerics/headers/cmath/hypot.cc: Likewise.
1338         * testsuite/26_numerics/headers/cmath/special_functions_global.cc:
1339         Likewise.
1340         * testsuite/26_numerics/lcm/1.cc: Likewise.
1341         * testsuite/26_numerics/lcm/lcm_neg.cc: Likewise.
1342         * testsuite/26_numerics/valarray/deduction.cc: Likewise.
1343         * testsuite/27_io/basic_ostream/inserters_other/char/lwg2221.cc:
1344         Likewise.
1345         * testsuite/27_io/manipulators/standard/char/quoted_sv.cc:
1346         Likewise.
1347         * testsuite/27_io/manipulators/standard/wchar_t/quoted_sv.cc:
1348         Likewise.
1349         * testsuite/27_io/types/4.cc: Likewise.
1350         * testsuite/28_regex/basic_regex/ctors/deduction.cc: Likewise.
1351         * testsuite/libstdc++-prettyprinters/91997.cc: Likewise.
1352         * testsuite/libstdc++-prettyprinters/cxx17.cc: Likewise.
1353
1354 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
1355
1356         * testsuite/20_util/function_objects/searchers.cc: Remove
1357         -std=gnu++17 from dg-options directive.
1358         * testsuite/20_util/specialized_algorithms/memory_management_tools/1.cc:
1359         Likewise.
1360         * testsuite/20_util/specialized_algorithms/memory_management_tools/destroy_neg.cc:
1361         Likewise.
1362         * testsuite/20_util/specialized_algorithms/uninitialized_value_construct/94540.cc:
1363         Likewise.
1364         * testsuite/20_util/specialized_algorithms/uninitialized_value_construct/94831.cc:
1365         Likewise.
1366         * testsuite/20_util/specialized_algorithms/uninitialized_value_construct_n/94540.cc:
1367         Likewise.
1368         * testsuite/20_util/specialized_algorithms/uninitialized_value_construct_n/sizes.cc:
1369         Likewise.
1370         * testsuite/20_util/unique_ptr/specialized_algorithms/swap_cxx17.cc:
1371         Likewise.
1372         * testsuite/25_algorithms/clamp/1.cc: Likewise.
1373         * testsuite/25_algorithms/clamp/2.cc: Likewise.
1374         * testsuite/25_algorithms/clamp/constexpr.cc: Likewise.
1375         * testsuite/25_algorithms/clamp/requirements/explicit_instantiation/1.cc:
1376         Likewise.
1377         * testsuite/25_algorithms/clamp/requirements/explicit_instantiation/pod.cc:
1378         Likewise.
1379         * testsuite/25_algorithms/for_each/for_each_n.cc: Likewise.
1380         * testsuite/25_algorithms/for_each/for_each_n_debug.cc:
1381         Likewise.
1382         * testsuite/25_algorithms/sample/1.cc: Likewise.
1383         * testsuite/25_algorithms/sample/2.cc: Likewise.
1384         * testsuite/25_algorithms/sample/3.cc: Likewise.
1385         * testsuite/25_algorithms/sample/81221.cc: Likewise.
1386         * testsuite/25_algorithms/search/searcher.cc: Likewise.
1387         * testsuite/26_numerics/exclusive_scan/1.cc: Likewise.
1388         * testsuite/26_numerics/inclusive_scan/1.cc: Likewise.
1389         * testsuite/26_numerics/reduce/1.cc: Likewise.
1390         * testsuite/26_numerics/reduce/2.cc: Likewise.
1391         * testsuite/26_numerics/transform_exclusive_scan/1.cc: Likewise.
1392         * testsuite/26_numerics/transform_inclusive_scan/1.cc: Likewise.
1393         * testsuite/26_numerics/transform_reduce/1.cc: Likewise.
1394
1395 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
1396
1397         * testsuite/23_containers/array/cons/deduction.cc: Remove
1398         -std=gnu++17 from dg-options directive.
1399         * testsuite/23_containers/array/cons/deduction_neg.cc: Likewise.
1400         * testsuite/23_containers/array/element_access/constexpr_c++17.cc:
1401         Likewise.
1402         * testsuite/23_containers/array/requirements/constexpr_iter.cc:
1403         Likewise.
1404         * testsuite/23_containers/array/specialized_algorithms/swap_cxx17.cc:
1405         Likewise.
1406         * testsuite/23_containers/deque/cons/deduction.cc: Likewise.
1407         * testsuite/23_containers/deque/modifiers/emplace/cxx17_return.cc:
1408         Likewise.
1409         * testsuite/23_containers/forward_list/cons/deduction.cc:
1410         Likewise.
1411         * testsuite/23_containers/forward_list/modifiers/emplace_cxx17_return.cc:
1412         Likewise.
1413         * testsuite/23_containers/list/cons/deduction.cc: Likewise.
1414         * testsuite/23_containers/list/modifiers/emplace/cxx17_return.cc:
1415         Likewise.
1416         * testsuite/23_containers/map/cons/deduction.cc: Likewise.
1417         * testsuite/23_containers/map/modifiers/extract.cc: Likewise.
1418         * testsuite/23_containers/map/modifiers/insert/83226.cc:
1419         Likewise.
1420         * testsuite/23_containers/map/modifiers/insert_or_assign/1.cc:
1421         Likewise.
1422         * testsuite/23_containers/map/modifiers/merge.cc: Likewise.
1423         * testsuite/23_containers/map/modifiers/try_emplace/1.cc:
1424         Likewise.
1425         * testsuite/23_containers/multimap/cons/deduction.cc: Likewise.
1426         * testsuite/23_containers/multimap/modifiers/extract.cc:
1427         Likewise.
1428         * testsuite/23_containers/multimap/modifiers/merge.cc: Likewise.
1429         * testsuite/23_containers/multiset/cons/deduction.cc: Likewise.
1430         * testsuite/23_containers/multiset/modifiers/extract.cc:
1431         Likewise.
1432         * testsuite/23_containers/multiset/modifiers/merge.cc: Likewise.
1433         * testsuite/23_containers/priority_queue/deduction.cc: Likewise.
1434         * testsuite/23_containers/queue/deduction.cc: Likewise.
1435         * testsuite/23_containers/queue/members/emplace_cxx17_return.cc:
1436         Likewise.
1437         * testsuite/23_containers/set/cons/deduction.cc: Likewise.
1438         * testsuite/23_containers/set/modifiers/extract.cc: Likewise.
1439         * testsuite/23_containers/set/modifiers/merge.cc: Likewise.
1440         * testsuite/23_containers/set/modifiers/node_swap.cc: Likewise.
1441         * testsuite/23_containers/stack/deduction.cc: Likewise.
1442         * testsuite/23_containers/stack/members/emplace_cxx17_return.cc:
1443         Likewise.
1444         * testsuite/23_containers/unordered_map/cons/deduction.cc:
1445         Likewise.
1446         * testsuite/23_containers/unordered_map/modifiers/extract.cc:
1447         Likewise.
1448         * testsuite/23_containers/unordered_map/modifiers/insert_or_assign.cc:
1449         Likewise.
1450         * testsuite/23_containers/unordered_map/modifiers/merge.cc:
1451         Likewise.
1452         * testsuite/23_containers/unordered_map/modifiers/try_emplace.cc:
1453         Likewise.
1454         * testsuite/23_containers/unordered_multimap/cons/deduction.cc:
1455         Likewise.
1456         * testsuite/23_containers/unordered_multimap/modifiers/extract.cc:
1457         Likewise.
1458         * testsuite/23_containers/unordered_multimap/modifiers/merge.cc:
1459         Likewise.
1460         * testsuite/23_containers/unordered_multiset/cons/deduction.cc:
1461         Likewise.
1462         * testsuite/23_containers/unordered_multiset/modifiers/extract.cc:
1463         Likewise.
1464         * testsuite/23_containers/unordered_multiset/modifiers/merge.cc:
1465         Likewise.
1466         * testsuite/23_containers/unordered_set/cons/deduction.cc:
1467         Likewise.
1468         * testsuite/23_containers/unordered_set/modifiers/extract.cc:
1469         Likewise.
1470         * testsuite/23_containers/unordered_set/modifiers/merge.cc:
1471         Likewise.
1472         * testsuite/23_containers/vector/bool/emplace_cxx17_return.cc:
1473         Likewise.
1474         * testsuite/23_containers/vector/cons/89164_c++17.cc: Likewise.
1475         * testsuite/23_containers/vector/cons/deduction.cc: Likewise.
1476         * testsuite/23_containers/vector/modifiers/emplace/cxx17_return.cc:
1477         Likewise.
1478
1479 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
1480
1481         * testsuite/21_strings/basic_string/79162.cc: Remove
1482         -std=gnu++17 from dg-options directive.
1483         * testsuite/21_strings/basic_string/cons/char/7.cc: Likewise.
1484         * testsuite/21_strings/basic_string/cons/char/79162.cc:
1485         Likewise.
1486         * testsuite/21_strings/basic_string/cons/char/86138.cc:
1487         Likewise.
1488         * testsuite/21_strings/basic_string/cons/char/9.cc: Likewise.
1489         * testsuite/21_strings/basic_string/cons/char/deduction.cc:
1490         Likewise.
1491         * testsuite/21_strings/basic_string/cons/char/moveable2_c++17.cc:
1492         Likewise.
1493         * testsuite/21_strings/basic_string/cons/wchar_t/7.cc: Likewise.
1494         * testsuite/21_strings/basic_string/cons/wchar_t/79162.cc:
1495         Likewise.
1496         * testsuite/21_strings/basic_string/cons/wchar_t/86138.cc:
1497         Likewise.
1498         * testsuite/21_strings/basic_string/cons/wchar_t/9.cc: Likewise.
1499         * testsuite/21_strings/basic_string/cons/wchar_t/deduction.cc:
1500         Likewise.
1501         * testsuite/21_strings/basic_string/cons/wchar_t/moveable2_c++17.cc:
1502         Likewise.
1503         * testsuite/21_strings/basic_string/hash/hash.cc: Likewise.
1504         * testsuite/21_strings/basic_string/lwg2758.cc: Likewise.
1505         * testsuite/21_strings/basic_string/lwg2946.cc: Likewise.
1506         * testsuite/21_strings/basic_string/modifiers/append/char/4.cc:
1507         Likewise.
1508         * testsuite/21_strings/basic_string/modifiers/append/wchar_t/4.cc:
1509         Likewise.
1510         * testsuite/21_strings/basic_string/modifiers/assign/char/4.cc:
1511         Likewise.
1512         * testsuite/21_strings/basic_string/modifiers/assign/wchar_t/4.cc:
1513         Likewise.
1514         * testsuite/21_strings/basic_string/modifiers/insert/char/3.cc:
1515         Likewise.
1516         * testsuite/21_strings/basic_string/modifiers/insert/wchar_t/3.cc:
1517         Likewise.
1518         * testsuite/21_strings/basic_string/modifiers/replace/char/7.cc:
1519         Likewise.
1520         * testsuite/21_strings/basic_string/modifiers/replace/wchar_t/7.cc:
1521         Likewise.
1522         * testsuite/21_strings/basic_string/operations/compare/char/2.cc:
1523         Likewise.
1524         * testsuite/21_strings/basic_string/operations/compare/wchar_t/2.cc:
1525         Likewise.
1526         * testsuite/21_strings/basic_string/operations/data/char/2.cc:
1527         Likewise.
1528         * testsuite/21_strings/basic_string/operations/data/char/86169.cc:
1529         Likewise.
1530         * testsuite/21_strings/basic_string/operations/data/wchar_t/2.cc:
1531         Likewise.
1532         * testsuite/21_strings/basic_string/operations/find/char/5.cc:
1533         Likewise.
1534         * testsuite/21_strings/basic_string/operations/find/wchar_t/5.cc:
1535         Likewise.
1536         * testsuite/21_strings/basic_string/operators/char/5.cc:
1537         Likewise.
1538         * testsuite/21_strings/basic_string/operators/wchar_t/5.cc:
1539         Likewise.
1540         * testsuite/21_strings/basic_string_view/capacity/1.cc:
1541         Likewise.
1542         * testsuite/21_strings/basic_string_view/capacity/empty_neg.cc:
1543         Likewise.
1544         * testsuite/21_strings/basic_string_view/cons/char/1.cc:
1545         Likewise.
1546         * testsuite/21_strings/basic_string_view/cons/char/2.cc:
1547         Likewise.
1548         * testsuite/21_strings/basic_string_view/cons/char/3.cc:
1549         Likewise.
1550         * testsuite/21_strings/basic_string_view/cons/char/nonnull.cc:
1551         Likewise.
1552         * testsuite/21_strings/basic_string_view/cons/wchar_t/1.cc:
1553         Likewise.
1554         * testsuite/21_strings/basic_string_view/cons/wchar_t/2.cc:
1555         Likewise.
1556         * testsuite/21_strings/basic_string_view/cons/wchar_t/3.cc:
1557         Likewise.
1558         * testsuite/21_strings/basic_string_view/cons/wchar_t/nonnull.cc:
1559         Likewise.
1560         * testsuite/21_strings/basic_string_view/element_access/char/1.cc:
1561         Likewise.
1562         * testsuite/21_strings/basic_string_view/element_access/char/2.cc:
1563         Likewise.
1564         * testsuite/21_strings/basic_string_view/element_access/char/back_constexpr_neg.cc:
1565         Likewise.
1566         * testsuite/21_strings/basic_string_view/element_access/char/constexpr.cc:
1567         Likewise.
1568         * testsuite/21_strings/basic_string_view/element_access/char/constexpr_neg.cc:
1569         Likewise.
1570         * testsuite/21_strings/basic_string_view/element_access/char/empty.cc:
1571         Likewise.
1572         * testsuite/21_strings/basic_string_view/element_access/char/front_back.cc:
1573         Likewise.
1574         * testsuite/21_strings/basic_string_view/element_access/char/front_back_constexpr.cc:
1575         Likewise.
1576         * testsuite/21_strings/basic_string_view/element_access/char/front_constexpr_neg.cc:
1577         Likewise.
1578         * testsuite/21_strings/basic_string_view/element_access/wchar_t/1.cc:
1579         Likewise.
1580         * testsuite/21_strings/basic_string_view/element_access/wchar_t/2.cc:
1581         Likewise.
1582         * testsuite/21_strings/basic_string_view/element_access/wchar_t/back_constexpr_neg.cc:
1583         Likewise.
1584         * testsuite/21_strings/basic_string_view/element_access/wchar_t/constexpr.cc:
1585         Likewise.
1586         * testsuite/21_strings/basic_string_view/element_access/wchar_t/constexpr_neg.cc:
1587         Likewise.
1588         * testsuite/21_strings/basic_string_view/element_access/wchar_t/empty.cc:
1589         Likewise.
1590         * testsuite/21_strings/basic_string_view/element_access/wchar_t/front_back.cc:
1591         Likewise.
1592         * testsuite/21_strings/basic_string_view/element_access/wchar_t/front_constexpr_neg.cc:
1593         Likewise.
1594         * testsuite/21_strings/basic_string_view/include.cc: Likewise.
1595         * testsuite/21_strings/basic_string_view/inserters/94051.cc:
1596         Likewise.
1597         * testsuite/21_strings/basic_string_view/inserters/char/1.cc:
1598         Likewise.
1599         * testsuite/21_strings/basic_string_view/inserters/char/2.cc:
1600         Likewise.
1601         * testsuite/21_strings/basic_string_view/inserters/char/3.cc:
1602         Likewise.
1603         * testsuite/21_strings/basic_string_view/inserters/pod/10081-out.cc:
1604         Likewise.
1605         * testsuite/21_strings/basic_string_view/inserters/wchar_t/1.cc:
1606         Likewise.
1607         * testsuite/21_strings/basic_string_view/inserters/wchar_t/2.cc:
1608         Likewise.
1609         * testsuite/21_strings/basic_string_view/inserters/wchar_t/3.cc:
1610         Likewise.
1611         * testsuite/21_strings/basic_string_view/literals/types-char8_t.cc:
1612         Likewise.
1613         * testsuite/21_strings/basic_string_view/literals/types.cc:
1614         Likewise.
1615         * testsuite/21_strings/basic_string_view/literals/values-char8_t.cc:
1616         Likewise.
1617         * testsuite/21_strings/basic_string_view/literals/values.cc:
1618         Likewise.
1619         * testsuite/21_strings/basic_string_view/modifiers/remove_prefix/char/1.cc:
1620         Likewise.
1621         * testsuite/21_strings/basic_string_view/modifiers/remove_prefix/wchar_t/1.cc:
1622         Likewise.
1623         * testsuite/21_strings/basic_string_view/modifiers/remove_suffix/char/1.cc:
1624         Likewise.
1625         * testsuite/21_strings/basic_string_view/modifiers/remove_suffix/wchar_t/1.cc:
1626         Likewise.
1627         * testsuite/21_strings/basic_string_view/modifiers/swap/char/1.cc:
1628         Likewise.
1629         * testsuite/21_strings/basic_string_view/modifiers/swap/wchar_t/1.cc:
1630         Likewise.
1631         * testsuite/21_strings/basic_string_view/operations/compare/char/1.cc:
1632         Likewise.
1633         * testsuite/21_strings/basic_string_view/operations/compare/char/13650.cc:
1634         Likewise.
1635         * testsuite/21_strings/basic_string_view/operations/compare/char/2.cc:
1636         Likewise.
1637         * testsuite/21_strings/basic_string_view/operations/compare/char/70483.cc:
1638         Likewise.
1639         * testsuite/21_strings/basic_string_view/operations/compare/char/nonnull.cc:
1640         Likewise.
1641         * testsuite/21_strings/basic_string_view/operations/compare/wchar_t/1.cc:
1642         Likewise.
1643         * testsuite/21_strings/basic_string_view/operations/compare/wchar_t/13650.cc:
1644         Likewise.
1645         * testsuite/21_strings/basic_string_view/operations/compare/wchar_t/2.cc:
1646         Likewise.
1647         * testsuite/21_strings/basic_string_view/operations/copy/char/1.cc:
1648         Likewise.
1649         * testsuite/21_strings/basic_string_view/operations/copy/char/2.cc:
1650         Likewise.
1651         * testsuite/21_strings/basic_string_view/operations/copy/wchar_t/1.cc:
1652         Likewise.
1653         * testsuite/21_strings/basic_string_view/operations/copy/wchar_t/2.cc:
1654         Likewise.
1655         * testsuite/21_strings/basic_string_view/operations/data/char/1.cc:
1656         Likewise.
1657         * testsuite/21_strings/basic_string_view/operations/data/wchar_t/1.cc:
1658         Likewise.
1659         * testsuite/21_strings/basic_string_view/operations/find/char/1.cc:
1660         Likewise.
1661         * testsuite/21_strings/basic_string_view/operations/find/char/2.cc:
1662         Likewise.
1663         * testsuite/21_strings/basic_string_view/operations/find/char/3.cc:
1664         Likewise.
1665         * testsuite/21_strings/basic_string_view/operations/find/char/4.cc:
1666         Likewise.
1667         * testsuite/21_strings/basic_string_view/operations/find/char/nonnull.cc:
1668         Likewise.
1669         * testsuite/21_strings/basic_string_view/operations/find/wchar_t/1.cc:
1670         Likewise.
1671         * testsuite/21_strings/basic_string_view/operations/find/wchar_t/2.cc:
1672         Likewise.
1673         * testsuite/21_strings/basic_string_view/operations/find/wchar_t/3.cc:
1674         Likewise.
1675         * testsuite/21_strings/basic_string_view/operations/find/wchar_t/4.cc:
1676         Likewise.
1677         * testsuite/21_strings/basic_string_view/operations/rfind/char/1.cc:
1678         Likewise.
1679         * testsuite/21_strings/basic_string_view/operations/rfind/char/2.cc:
1680         Likewise.
1681         * testsuite/21_strings/basic_string_view/operations/rfind/char/3.cc:
1682         Likewise.
1683         * testsuite/21_strings/basic_string_view/operations/rfind/char/nonnull.cc:
1684         Likewise.
1685         * testsuite/21_strings/basic_string_view/operations/rfind/wchar_t/1.cc:
1686         Likewise.
1687         * testsuite/21_strings/basic_string_view/operations/rfind/wchar_t/2.cc:
1688         Likewise.
1689         * testsuite/21_strings/basic_string_view/operations/rfind/wchar_t/3.cc:
1690         Likewise.
1691         * testsuite/21_strings/basic_string_view/operations/string_conversion/1.cc:
1692         Likewise.
1693         * testsuite/21_strings/basic_string_view/operations/substr/char/1.cc:
1694         Likewise.
1695         * testsuite/21_strings/basic_string_view/operations/substr/char/83511.cc:
1696         Likewise.
1697         * testsuite/21_strings/basic_string_view/operations/substr/wchar_t/1.cc:
1698         Likewise.
1699         * testsuite/21_strings/basic_string_view/operations/substr/wchar_t/83511.cc:
1700         Likewise.
1701         * testsuite/21_strings/basic_string_view/operators/char/2.cc:
1702         Likewise.
1703         * testsuite/21_strings/basic_string_view/operators/char/89446.cc:
1704         Likewise.
1705         * testsuite/21_strings/basic_string_view/operators/wchar_t/2.cc:
1706         Likewise.
1707         * testsuite/21_strings/basic_string_view/operators/wchar_t/89446.cc:
1708         Likewise.
1709         * testsuite/21_strings/basic_string_view/range_access/char/1.cc:
1710         Likewise.
1711         * testsuite/21_strings/basic_string_view/range_access/wchar_t/1.cc:
1712         Likewise.
1713         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/1.cc:
1714         Likewise.
1715         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/char/1.cc:
1716         Likewise.
1717         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/char16_t/1.cc:
1718         Likewise.
1719         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/char32_t/1.cc:
1720         Likewise.
1721         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/char8_t/1.cc:
1722         Likewise.
1723         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/wchar_t/1.cc:
1724         Likewise.
1725         * testsuite/21_strings/basic_string_view/requirements/traits_neg.cc:
1726         Likewise.
1727         * testsuite/21_strings/basic_string_view/requirements/typedefs.cc:
1728         Likewise.
1729         * testsuite/21_strings/basic_string_view/typedefs.cc: Likewise.
1730         * testsuite/21_strings/basic_string_view/types/1.cc: Likewise.
1731         * testsuite/21_strings/char_traits/requirements/char/99181.cc:
1732         Likewise.
1733         * testsuite/21_strings/char_traits/requirements/constexpr_functions_c++17.cc:
1734
1735 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
1736
1737         * testsuite/20_util/memory_resource/1.cc: Remove -std=gnu++17
1738         from dg-options directive.
1739         * testsuite/20_util/memory_resource/2.cc: Likewise.
1740         * testsuite/20_util/monotonic_buffer_resource/1.cc: Likewise.
1741         * testsuite/20_util/monotonic_buffer_resource/93208.cc:
1742         Likewise.
1743         * testsuite/20_util/monotonic_buffer_resource/allocate.cc:
1744         Likewise.
1745         * testsuite/20_util/monotonic_buffer_resource/deallocate.cc:
1746         Likewise.
1747         * testsuite/20_util/monotonic_buffer_resource/release.cc:
1748         Likewise.
1749         * testsuite/20_util/monotonic_buffer_resource/upstream_resource.cc:
1750         Likewise.
1751         * testsuite/20_util/polymorphic_allocator/1.cc: Likewise.
1752         * testsuite/20_util/polymorphic_allocator/construct_pair.cc:
1753         Likewise.
1754         * testsuite/20_util/polymorphic_allocator/resource.cc: Likewise.
1755         * testsuite/20_util/polymorphic_allocator/select.cc: Likewise.
1756         * testsuite/20_util/synchronized_pool_resource/allocate.cc:
1757         Likewise.
1758         * testsuite/20_util/synchronized_pool_resource/allocate_single.cc:
1759         Likewise.
1760         * testsuite/20_util/synchronized_pool_resource/cons.cc:
1761         Likewise.
1762         * testsuite/20_util/synchronized_pool_resource/cons_single.cc:
1763         Likewise.
1764         * testsuite/20_util/synchronized_pool_resource/is_equal.cc:
1765         Likewise.
1766         * testsuite/20_util/synchronized_pool_resource/multithreaded.cc:
1767         Likewise.
1768         * testsuite/20_util/synchronized_pool_resource/options.cc:
1769         Likewise.
1770         * testsuite/20_util/synchronized_pool_resource/release.cc:
1771         Likewise.
1772         * testsuite/20_util/synchronized_pool_resource/release_single.cc:
1773         Likewise.
1774         * testsuite/20_util/unsynchronized_pool_resource/allocate-max-chunks.cc:
1775         Likewise.
1776         * testsuite/20_util/unsynchronized_pool_resource/allocate.cc:
1777         Likewise.
1778         * testsuite/20_util/unsynchronized_pool_resource/cons.cc:
1779         Likewise.
1780         * testsuite/20_util/unsynchronized_pool_resource/is_equal.cc:
1781         Likewise.
1782         * testsuite/20_util/unsynchronized_pool_resource/options.cc:
1783         Likewise.
1784         * testsuite/20_util/unsynchronized_pool_resource/release.cc:
1785         Likewise.
1786         * testsuite/21_strings/basic_string/types/pmr_typedefs.cc:
1787         Likewise.
1788         * testsuite/23_containers/deque/types/pmr_typedefs.cc: Likewise.
1789         * testsuite/23_containers/deque/types/pmr_typedefs_debug.cc:
1790         Likewise.
1791         * testsuite/23_containers/forward_list/pmr_typedefs.cc:
1792         Likewise.
1793         * testsuite/23_containers/forward_list/pmr_typedefs_debug.cc:
1794         Likewise.
1795         * testsuite/23_containers/list/pmr_typedefs.cc: Likewise.
1796         * testsuite/23_containers/list/pmr_typedefs_debug.cc: Likewise.
1797         * testsuite/23_containers/map/pmr_typedefs.cc: Likewise.
1798         * testsuite/23_containers/map/pmr_typedefs_debug.cc: Likewise.
1799         * testsuite/23_containers/multimap/pmr_typedefs.cc: Likewise.
1800         * testsuite/23_containers/multimap/pmr_typedefs_debug.cc:
1801         Likewise.
1802         * testsuite/23_containers/multiset/pmr_typedefs.cc: Likewise.
1803         * testsuite/23_containers/multiset/pmr_typedefs_debug.cc:
1804         Likewise.
1805         * testsuite/23_containers/set/pmr_typedefs.cc: Likewise.
1806         * testsuite/23_containers/set/pmr_typedefs_debug.cc: Likewise.
1807         * testsuite/23_containers/unordered_map/pmr_typedefs.cc:
1808         Likewise.
1809         * testsuite/23_containers/unordered_map/pmr_typedefs_debug.cc:
1810         Likewise.
1811         * testsuite/23_containers/unordered_multimap/pmr_typedefs.cc:
1812         Likewise.
1813         * testsuite/23_containers/unordered_multimap/pmr_typedefs_debug.cc:
1814         Likewise.
1815         * testsuite/23_containers/unordered_multiset/pmr_typedefs.cc:
1816         Likewise.
1817         * testsuite/23_containers/unordered_multiset/pmr_typedefs_debug.cc:
1818         Likewise.
1819         * testsuite/23_containers/unordered_set/pmr_typedefs.cc:
1820         Likewise.
1821         * testsuite/23_containers/unordered_set/pmr_typedefs_debug.cc:
1822         Likewise.
1823         * testsuite/23_containers/vector/pmr_typedefs.cc: Likewise.
1824         * testsuite/23_containers/vector/types/pmr_typedefs_debug.cc:
1825         Likewise.
1826         * testsuite/28_regex/match_results/pmr_typedefs.cc: Likewise.
1827
1828 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
1829
1830         * testsuite/29_atomics/atomic/69769.cc: Remove -std=gnu++17 from
1831         dg-options.
1832         * testsuite/29_atomics/atomic/is_always_lock_free.cc:
1833         * testsuite/29_atomics/atomic/requirements/typedefs.cc:
1834         * testsuite/29_atomics/atomic_integral/is_always_lock_free.cc:
1835         * testsuite/29_atomics/atomic_integral/requirements/typedefs.cc:
1836         * testsuite/30_threads/lock_guard/cons/deduction.cc: Likewise.
1837         * testsuite/30_threads/scoped_lock/cons/1.cc: Likewise.
1838         * testsuite/30_threads/scoped_lock/cons/deduction.cc: Likewise.
1839         * testsuite/30_threads/scoped_lock/requirements/explicit_instantiation.cc:
1840         Likewise.
1841         * testsuite/30_threads/scoped_lock/requirements/typedefs.cc:
1842         Likewise.
1843         * testsuite/30_threads/shared_lock/70766.cc: Likewise.
1844         * testsuite/30_threads/shared_mutex/cons/1.cc: Likewise.
1845         * testsuite/30_threads/shared_mutex/cons/assign_neg.cc:
1846         Likewise.
1847         * testsuite/30_threads/shared_mutex/cons/copy_neg.cc: Likewise.
1848         * testsuite/30_threads/shared_mutex/requirements/standard_layout.cc:
1849         Likewise.
1850         * testsuite/30_threads/shared_mutex/try_lock/1.cc: Likewise.
1851         * testsuite/30_threads/shared_mutex/try_lock/2.cc: Likewise.
1852         * testsuite/30_threads/shared_mutex/unlock/1.cc: Likewise.
1853         * testsuite/30_threads/unique_lock/cons/deduction.cc: Likewise.
1854
1855 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
1856
1857         * testsuite/20_util/any/assign/1.cc: Remove -std=gnu++17 from
1858         dg-options directive.
1859         * testsuite/20_util/any/assign/2.cc: Likewise.
1860         * testsuite/20_util/any/assign/emplace.cc: Likewise.
1861         * testsuite/20_util/any/assign/exception.cc: Likewise.
1862         * testsuite/20_util/any/assign/self.cc: Likewise.
1863         * testsuite/20_util/any/cons/1.cc: Likewise.
1864         * testsuite/20_util/any/cons/2.cc: Likewise.
1865         * testsuite/20_util/any/cons/90415.cc: Likewise.
1866         * testsuite/20_util/any/cons/92156.cc: Likewise.
1867         * testsuite/20_util/any/cons/aligned.cc: Likewise.
1868         * testsuite/20_util/any/cons/explicit.cc: Likewise.
1869         * testsuite/20_util/any/cons/in_place.cc: Likewise.
1870         * testsuite/20_util/any/cons/nontrivial.cc: Likewise.
1871         * testsuite/20_util/any/make_any.cc: Likewise.
1872         * testsuite/20_util/any/misc/any_cast.cc: Likewise.
1873         * testsuite/20_util/any/misc/any_cast_neg.cc: Likewise.
1874         * testsuite/20_util/any/misc/any_cast_no_rtti.cc: Likewise.
1875         * testsuite/20_util/any/misc/swap.cc: Likewise.
1876         * testsuite/20_util/any/modifiers/1.cc: Likewise.
1877         * testsuite/20_util/any/modifiers/83658.cc: Likewise.
1878         * testsuite/20_util/any/modifiers/92156.cc: Likewise.
1879         * testsuite/20_util/any/observers/type.cc: Likewise.
1880         * testsuite/20_util/any/requirements.cc: Likewise.
1881         * testsuite/20_util/any/typedefs.cc: Likewise.
1882         * testsuite/20_util/optional/77288.cc: Likewise.
1883         * testsuite/20_util/optional/84601.cc: Likewise.
1884         * testsuite/20_util/optional/assignment/1.cc: Likewise.
1885         * testsuite/20_util/optional/assignment/2.cc: Likewise.
1886         * testsuite/20_util/optional/assignment/3.cc: Likewise.
1887         * testsuite/20_util/optional/assignment/4.cc: Likewise.
1888         * testsuite/20_util/optional/assignment/5.cc: Likewise.
1889         * testsuite/20_util/optional/assignment/6.cc: Likewise.
1890         * testsuite/20_util/optional/assignment/7.cc: Likewise.
1891         * testsuite/20_util/optional/assignment/8.cc: Likewise.
1892         * testsuite/20_util/optional/assignment/9.cc: Likewise.
1893         * testsuite/20_util/optional/bad_access.cc: Likewise.
1894         * testsuite/20_util/optional/cons/77727.cc: Likewise.
1895         * testsuite/20_util/optional/cons/85642.cc: Likewise.
1896         * testsuite/20_util/optional/cons/copy.cc: Likewise.
1897         * testsuite/20_util/optional/cons/deduction.cc: Likewise.
1898         * testsuite/20_util/optional/cons/default.cc: Likewise.
1899         * testsuite/20_util/optional/cons/move.cc: Likewise.
1900         * testsuite/20_util/optional/cons/trivial.cc: Likewise.
1901         * testsuite/20_util/optional/cons/value.cc: Likewise.
1902         * testsuite/20_util/optional/cons/value_neg.cc: Likewise.
1903         * testsuite/20_util/optional/constexpr/cons/default.cc:
1904         Likewise.
1905         * testsuite/20_util/optional/constexpr/cons/value.cc: Likewise.
1906         * testsuite/20_util/optional/constexpr/in_place.cc: Likewise.
1907         * testsuite/20_util/optional/constexpr/make_optional.cc:
1908         Likewise.
1909         * testsuite/20_util/optional/constexpr/nullopt.cc: Likewise.
1910         * testsuite/20_util/optional/constexpr/observers/1.cc: Likewise.
1911         * testsuite/20_util/optional/constexpr/observers/2.cc: Likewise.
1912         * testsuite/20_util/optional/constexpr/observers/3.cc: Likewise.
1913         * testsuite/20_util/optional/constexpr/observers/4.cc: Likewise.
1914         * testsuite/20_util/optional/constexpr/observers/5.cc: Likewise.
1915         * testsuite/20_util/optional/constexpr/relops/1.cc: Likewise.
1916         * testsuite/20_util/optional/constexpr/relops/2.cc: Likewise.
1917         * testsuite/20_util/optional/constexpr/relops/3.cc: Likewise.
1918         * testsuite/20_util/optional/constexpr/relops/4.cc: Likewise.
1919         * testsuite/20_util/optional/constexpr/relops/5.cc: Likewise.
1920         * testsuite/20_util/optional/constexpr/relops/6.cc: Likewise.
1921         * testsuite/20_util/optional/hash.cc: Likewise.
1922         * testsuite/20_util/optional/in_place.cc: Likewise.
1923         * testsuite/20_util/optional/make_optional.cc: Likewise.
1924         * testsuite/20_util/optional/nullopt.cc: Likewise.
1925         * testsuite/20_util/optional/observers/1.cc: Likewise.
1926         * testsuite/20_util/optional/observers/2.cc: Likewise.
1927         * testsuite/20_util/optional/observers/3.cc: Likewise.
1928         * testsuite/20_util/optional/observers/4.cc: Likewise.
1929         * testsuite/20_util/optional/observers/5.cc: Likewise.
1930         * testsuite/20_util/optional/observers/6.cc: Likewise.
1931         * testsuite/20_util/optional/relops/1.cc: Likewise.
1932         * testsuite/20_util/optional/relops/2.cc: Likewise.
1933         * testsuite/20_util/optional/relops/3.cc: Likewise.
1934         * testsuite/20_util/optional/relops/4.cc: Likewise.
1935         * testsuite/20_util/optional/relops/5.cc: Likewise.
1936         * testsuite/20_util/optional/relops/6.cc: Likewise.
1937         * testsuite/20_util/optional/relops/7.cc: Likewise.
1938         * testsuite/20_util/optional/requirements.cc: Likewise.
1939         * testsuite/20_util/optional/swap/1.cc: Likewise.
1940         * testsuite/20_util/optional/swap/2.cc: Likewise.
1941         * testsuite/20_util/optional/typedefs.cc: Likewise.
1942         * testsuite/20_util/variant/80165.cc: Likewise.
1943         * testsuite/20_util/variant/85183.cc: Likewise.
1944         * testsuite/20_util/variant/86874.cc: Likewise.
1945         * testsuite/20_util/variant/87431.cc: Likewise.
1946         * testsuite/20_util/variant/87619.cc: Likewise.
1947         * testsuite/20_util/variant/91807.cc: Likewise.
1948         * testsuite/20_util/variant/any.cc: Likewise.
1949         * testsuite/20_util/variant/compile.cc: Likewise.
1950         * testsuite/20_util/variant/deduction.cc: Likewise.
1951         * testsuite/20_util/variant/exception_safety.cc: Likewise.
1952         * testsuite/20_util/variant/hash.cc: Likewise.
1953         * testsuite/20_util/variant/index_type.cc: Likewise.
1954         * testsuite/20_util/variant/relops/89851.cc: Likewise.
1955         * testsuite/20_util/variant/relops/90008.cc: Likewise.
1956         * testsuite/20_util/variant/run.cc: Likewise.
1957         * testsuite/20_util/variant/visit.cc: Likewise.
1958
1959 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
1960
1961         * testsuite/27_io/basic_filebuf/open/char/path.cc: Remove
1962         -std=gnu++17 from dg-options directive.
1963         * testsuite/27_io/basic_fstream/cons/char/path.cc: Likewise.
1964         * testsuite/27_io/basic_fstream/open/char/path.cc: Likewise.
1965         * testsuite/27_io/basic_ifstream/cons/char/path.cc: Likewise.
1966         * testsuite/27_io/basic_ifstream/open/char/path.cc: Likewise.
1967         * testsuite/27_io/basic_ofstream/cons/char/path.cc: Likewise.
1968         * testsuite/27_io/basic_ofstream/open/char/path.cc: Likewise.
1969         * testsuite/27_io/filesystem/directory_entry/86597.cc: Likewise.
1970         * testsuite/27_io/filesystem/directory_entry/lwg3171.cc:
1971         Likewise.
1972         * testsuite/27_io/filesystem/file_status/1.cc: Likewise.
1973         * testsuite/27_io/filesystem/filesystem_error/cons.cc: Likewise.
1974         * testsuite/27_io/filesystem/filesystem_error/copy.cc: Likewise.
1975         * testsuite/27_io/filesystem/iterators/91067.cc: Likewise.
1976         * testsuite/27_io/filesystem/iterators/caching.cc: Likewise.
1977         * testsuite/27_io/filesystem/iterators/directory_iterator.cc:
1978         Likewise.
1979         * testsuite/27_io/filesystem/iterators/pop.cc: Likewise.
1980         * testsuite/27_io/filesystem/iterators/recursion_pending.cc:
1981         Likewise.
1982         * testsuite/27_io/filesystem/iterators/recursive_directory_iterator.cc:
1983         Likewise.
1984         * testsuite/27_io/filesystem/operations/absolute.cc: Likewise.
1985         * testsuite/27_io/filesystem/operations/all.cc: Likewise.
1986         * testsuite/27_io/filesystem/operations/canonical.cc: Likewise.
1987         * testsuite/27_io/filesystem/operations/copy.cc: Likewise.
1988         * testsuite/27_io/filesystem/operations/copy_file.cc: Likewise.
1989         * testsuite/27_io/filesystem/operations/create_directories.cc:
1990         Likewise.
1991         * testsuite/27_io/filesystem/operations/create_directory.cc:
1992         Likewise.
1993         * testsuite/27_io/filesystem/operations/create_symlink.cc:
1994         Likewise.
1995         * testsuite/27_io/filesystem/operations/current_path.cc:
1996         Likewise.
1997         * testsuite/27_io/filesystem/operations/equivalent.cc: Likewise.
1998         * testsuite/27_io/filesystem/operations/exists.cc: Likewise.
1999         * testsuite/27_io/filesystem/operations/file_size.cc: Likewise.
2000         * testsuite/27_io/filesystem/operations/is_empty.cc: Likewise.
2001         * testsuite/27_io/filesystem/operations/last_write_time.cc:
2002         Likewise.
2003         * testsuite/27_io/filesystem/operations/permissions.cc:
2004         Likewise.
2005         * testsuite/27_io/filesystem/operations/proximate.cc: Likewise.
2006         * testsuite/27_io/filesystem/operations/read_symlink.cc:
2007         Likewise.
2008         * testsuite/27_io/filesystem/operations/relative.cc: Likewise.
2009         * testsuite/27_io/filesystem/operations/remove.cc: Likewise.
2010         * testsuite/27_io/filesystem/operations/remove_all.cc: Likewise.
2011         * testsuite/27_io/filesystem/operations/rename.cc: Likewise.
2012         * testsuite/27_io/filesystem/operations/resize_file.cc:
2013         Likewise.
2014         * testsuite/27_io/filesystem/operations/space.cc: Likewise.
2015         * testsuite/27_io/filesystem/operations/status.cc: Likewise.
2016         * testsuite/27_io/filesystem/operations/symlink_status.cc:
2017         Likewise.
2018         * testsuite/27_io/filesystem/operations/temp_directory_path.cc:
2019         Likewise.
2020         * testsuite/27_io/filesystem/operations/weakly_canonical.cc:
2021         Likewise.
2022         * testsuite/27_io/filesystem/path/append/path.cc: Likewise.
2023         * testsuite/27_io/filesystem/path/append/source.cc: Likewise.
2024         * testsuite/27_io/filesystem/path/assign/assign.cc: Likewise.
2025         * testsuite/27_io/filesystem/path/assign/copy.cc: Likewise.
2026         * testsuite/27_io/filesystem/path/compare/compare.cc: Likewise.
2027         * testsuite/27_io/filesystem/path/compare/lwg2936.cc: Likewise.
2028         * testsuite/27_io/filesystem/path/compare/path.cc: Likewise.
2029         * testsuite/27_io/filesystem/path/compare/strings.cc: Likewise.
2030         * testsuite/27_io/filesystem/path/concat/92853.cc: Likewise.
2031         * testsuite/27_io/filesystem/path/concat/94063.cc: Likewise.
2032         * testsuite/27_io/filesystem/path/concat/path.cc: Likewise.
2033         * testsuite/27_io/filesystem/path/concat/strings.cc: Likewise.
2034         * testsuite/27_io/filesystem/path/construct/80762.cc: Likewise.
2035         * testsuite/27_io/filesystem/path/construct/90281.cc: Likewise.
2036         * testsuite/27_io/filesystem/path/construct/90634.cc: Likewise.
2037         * testsuite/27_io/filesystem/path/construct/copy.cc: Likewise.
2038         * testsuite/27_io/filesystem/path/construct/default.cc:
2039         Likewise.
2040         * testsuite/27_io/filesystem/path/construct/format.cc: Likewise.
2041         * testsuite/27_io/filesystem/path/construct/locale.cc: Likewise.
2042         * testsuite/27_io/filesystem/path/construct/range.cc: Likewise.
2043         * testsuite/27_io/filesystem/path/construct/string_view.cc:
2044         Likewise.
2045         * testsuite/27_io/filesystem/path/decompose/extension.cc:
2046         Likewise.
2047         * testsuite/27_io/filesystem/path/decompose/filename.cc:
2048         Likewise.
2049         * testsuite/27_io/filesystem/path/decompose/parent_path.cc:
2050         Likewise.
2051         * testsuite/27_io/filesystem/path/decompose/relative_path.cc:
2052         Likewise.
2053         * testsuite/27_io/filesystem/path/decompose/root_directory.cc:
2054         Likewise.
2055         * testsuite/27_io/filesystem/path/decompose/root_name.cc:
2056         Likewise.
2057         * testsuite/27_io/filesystem/path/decompose/root_path.cc:
2058         Likewise.
2059         * testsuite/27_io/filesystem/path/decompose/stem.cc: Likewise.
2060         * testsuite/27_io/filesystem/path/factory/u8path-char8_t.cc:
2061         Likewise.
2062         * testsuite/27_io/filesystem/path/factory/u8path.cc: Likewise.
2063         * testsuite/27_io/filesystem/path/generation/normal.cc:
2064         Likewise.
2065         * testsuite/27_io/filesystem/path/generation/normal2.cc:
2066         Likewise.
2067         * testsuite/27_io/filesystem/path/generation/proximate.cc:
2068         Likewise.
2069         * testsuite/27_io/filesystem/path/generation/relative.cc:
2070         Likewise.
2071         * testsuite/27_io/filesystem/path/generic/94242.cc: Likewise.
2072         * testsuite/27_io/filesystem/path/generic/generic_string.cc:
2073         Likewise.
2074         * testsuite/27_io/filesystem/path/generic/utf.cc: Likewise.
2075         * testsuite/27_io/filesystem/path/generic/wchar_t.cc: Likewise.
2076         * testsuite/27_io/filesystem/path/io/dr2989.cc: Likewise.
2077         * testsuite/27_io/filesystem/path/itr/components.cc: Likewise.
2078         * testsuite/27_io/filesystem/path/itr/traversal.cc: Likewise.
2079         * testsuite/27_io/filesystem/path/modifiers/clear.cc: Likewise.
2080         * testsuite/27_io/filesystem/path/modifiers/make_preferred.cc:
2081         Likewise.
2082         * testsuite/27_io/filesystem/path/modifiers/remove_filename.cc:
2083         Likewise.
2084         * testsuite/27_io/filesystem/path/modifiers/replace_extension.cc:
2085         Likewise.
2086         * testsuite/27_io/filesystem/path/modifiers/replace_filename.cc:
2087         Likewise.
2088         * testsuite/27_io/filesystem/path/modifiers/swap.cc: Likewise.
2089         * testsuite/27_io/filesystem/path/native/alloc.cc: Likewise.
2090         * testsuite/27_io/filesystem/path/native/string-char8_t.cc:
2091         Likewise.
2092         * testsuite/27_io/filesystem/path/native/string.cc: Likewise.
2093         * testsuite/27_io/filesystem/path/nonmember/append.cc: Likewise.
2094         * testsuite/27_io/filesystem/path/nonmember/cmp.cc: Likewise.
2095         * testsuite/27_io/filesystem/path/nonmember/hash_value.cc:
2096         Likewise.
2097         * testsuite/27_io/filesystem/path/query/empty.cc: Likewise.
2098         * testsuite/27_io/filesystem/path/query/empty_neg.cc:
2099         * testsuite/27_io/filesystem/path/query/has_extension.cc:
2100         Likewise.
2101         * testsuite/27_io/filesystem/path/query/has_filename.cc:
2102         Likewise.
2103         * testsuite/27_io/filesystem/path/query/has_parent_path.cc:
2104         Likewise.
2105         * testsuite/27_io/filesystem/path/query/has_relative_path.cc:
2106         Likewise.
2107         * testsuite/27_io/filesystem/path/query/has_root_directory.cc:
2108         Likewise.
2109         * testsuite/27_io/filesystem/path/query/has_root_name.cc:
2110         Likewise.
2111         * testsuite/27_io/filesystem/path/query/has_root_path.cc:
2112         Likewise.
2113         * testsuite/27_io/filesystem/path/query/has_stem.cc: Likewise.
2114         * testsuite/27_io/filesystem/path/query/is_absolute.cc:
2115         Likewise.
2116         * testsuite/27_io/filesystem/path/query/is_relative.cc:
2117         Likewise.
2118         * testsuite/experimental/filesystem/path/construct/string_view.cc:
2119         Likewise.
2120
2121 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
2122
2123         * testsuite/20_util/specialized_algorithms/pstl/uninitialized_construct.cc:
2124         Remove -std=gnu++17 from dg-options.
2125         * testsuite/20_util/specialized_algorithms/pstl/uninitialized_copy_move.cc:
2126         Likewise.
2127         * testsuite/20_util/specialized_algorithms/pstl/uninitialized_fill_destroy.cc:
2128         Likewise.
2129         * testsuite/25_algorithms/pstl/alg_merge/inplace_merge.cc:
2130         Likewise.
2131         * testsuite/25_algorithms/pstl/alg_merge/merge.cc: Likewise.
2132         * testsuite/25_algorithms/pstl/alg_modifying_operations/copy_if.cc:
2133         Likewise.
2134         * testsuite/25_algorithms/pstl/alg_modifying_operations/copy_move.cc:
2135         Likewise.
2136         * testsuite/25_algorithms/pstl/alg_modifying_operations/fill.cc:
2137         Likewise.
2138         * testsuite/25_algorithms/pstl/alg_modifying_operations/generate.cc:
2139         Likewise.
2140         * testsuite/25_algorithms/pstl/alg_modifying_operations/is_partitioned.cc:
2141         Likewise.
2142         * testsuite/25_algorithms/pstl/alg_modifying_operations/partition.cc:
2143         Likewise.
2144         * testsuite/25_algorithms/pstl/alg_modifying_operations/partition_copy.cc:
2145         Likewise.
2146         * testsuite/25_algorithms/pstl/alg_modifying_operations/remove.cc:
2147         Likewise.
2148         * testsuite/25_algorithms/pstl/alg_modifying_operations/remove_copy.cc:
2149         Likewise.
2150         * testsuite/25_algorithms/pstl/alg_modifying_operations/replace.cc:
2151         Likewise.
2152         * testsuite/25_algorithms/pstl/alg_modifying_operations/replace_copy.cc:
2153         Likewise.
2154         * testsuite/25_algorithms/pstl/alg_modifying_operations/rotate.cc:
2155         Likewise.
2156         * testsuite/25_algorithms/pstl/alg_modifying_operations/rotate_copy.cc:
2157         Likewise.
2158         * testsuite/25_algorithms/pstl/alg_modifying_operations/swap_ranges.cc:
2159         Likewise.
2160         * testsuite/25_algorithms/pstl/alg_modifying_operations/transform_binary.cc:
2161         Likewise.
2162         * testsuite/25_algorithms/pstl/alg_modifying_operations/transform_unary.cc:
2163         Likewise.
2164         * testsuite/25_algorithms/pstl/alg_modifying_operations/unique.cc:
2165         Likewise.
2166         * testsuite/25_algorithms/pstl/alg_modifying_operations/unique_copy_equal.cc:
2167         Likewise.
2168         * testsuite/25_algorithms/pstl/alg_nonmodifying/adjacent_find.cc:
2169         Likewise.
2170         * testsuite/25_algorithms/pstl/alg_nonmodifying/all_of.cc:
2171         Likewise.
2172         * testsuite/25_algorithms/pstl/alg_nonmodifying/any_of.cc:
2173         Likewise.
2174         * testsuite/25_algorithms/pstl/alg_nonmodifying/count.cc:
2175         Likewise.
2176         * testsuite/25_algorithms/pstl/alg_nonmodifying/equal.cc:
2177         Likewise.
2178         * testsuite/25_algorithms/pstl/alg_nonmodifying/find.cc:
2179         Likewise.
2180         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_end.cc:
2181         Likewise.
2182         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_first_of.cc:
2183         Likewise.
2184         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_if.cc:
2185         Likewise.
2186         * testsuite/25_algorithms/pstl/alg_nonmodifying/for_each.cc:
2187         Likewise.
2188         * testsuite/25_algorithms/pstl/alg_nonmodifying/mismatch.cc:
2189         Likewise.
2190         * testsuite/25_algorithms/pstl/alg_nonmodifying/none_of.cc:
2191         Likewise.
2192         * testsuite/25_algorithms/pstl/alg_nonmodifying/nth_element.cc:
2193         Likewise.
2194         * testsuite/25_algorithms/pstl/alg_nonmodifying/reverse.cc:
2195         Likewise.
2196         * testsuite/25_algorithms/pstl/alg_nonmodifying/reverse_copy.cc:
2197         Likewise.
2198         * testsuite/25_algorithms/pstl/alg_nonmodifying/search_n.cc:
2199         Likewise.
2200         * testsuite/25_algorithms/pstl/alg_sorting/includes.cc:
2201         Likewise.
2202         * testsuite/25_algorithms/pstl/alg_sorting/is_heap.cc: Likewise.
2203         * testsuite/25_algorithms/pstl/alg_sorting/is_sorted.cc:
2204         Likewise.
2205         * testsuite/25_algorithms/pstl/alg_sorting/lexicographical_compare.cc:
2206         Likewise.
2207         * testsuite/25_algorithms/pstl/alg_sorting/minmax_element.cc:
2208         Likewise.
2209         * testsuite/25_algorithms/pstl/alg_sorting/partial_sort.cc:
2210         Likewise.
2211         * testsuite/25_algorithms/pstl/alg_sorting/partial_sort_copy.cc:
2212         Likewise.
2213         * testsuite/25_algorithms/pstl/alg_sorting/set.cc: Likewise.
2214         * testsuite/25_algorithms/pstl/alg_sorting/sort.cc: Likewise.
2215         * testsuite/25_algorithms/pstl/feature_test-2.cc: Likewise.
2216         * testsuite/25_algorithms/pstl/feature_test-3.cc: Likewise.
2217         * testsuite/25_algorithms/pstl/feature_test-4.cc: Likewise.
2218         * testsuite/25_algorithms/pstl/feature_test-5.cc: Likewise.
2219         * testsuite/25_algorithms/pstl/feature_test.cc: Likewise.
2220         * testsuite/26_numerics/pstl/numeric_ops/adjacent_difference.cc:
2221         Likewise.
2222         * testsuite/26_numerics/pstl/numeric_ops/reduce.cc: Likewise.
2223         * testsuite/26_numerics/pstl/numeric_ops/scan.cc: Likewise.
2224         * testsuite/26_numerics/pstl/numeric_ops/transform_reduce.cc:
2225         Likewise.
2226         * testsuite/26_numerics/pstl/numeric_ops/transform_scan.cc:
2227         Likewise.
2228
2229 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
2230
2231         * testsuite/20_util/scoped_allocator/69293_neg.cc: Add dg-error
2232         for additional errors in C++20.
2233         * testsuite/20_util/specialized_algorithms/memory_management_tools/destroy_neg.cc:
2234         Likewise.
2235         * testsuite/20_util/uses_allocator/69293_neg.cc: Likewise.
2236         * testsuite/27_io/filesystem/path/io/dr2989.cc: Likewise.
2237
2238 2021-05-10  Jonathan Wakely  <jwakely@redhat.com>
2239
2240         * testsuite/20_util/variant/compile.cc: Rename 'any' to avoid
2241         clash with std::any.
2242
2243 2021-05-07  Jonathan Wakely  <jwakely@redhat.com>
2244
2245         * include/std/istream (__rvalue_stream_extraction_t): Replace
2246         use of __rval_streamable.
2247         * include/std/ostream (__rvalue_stream_insertion_t): Likewise.
2248         (__rval_streamable): Remove.
2249         (_Require_derived_from_ios_base, __derived_from_ios_base): New
2250         helper for checking constraints.
2251         * testsuite/27_io/basic_istream/extractors_other/char/4.cc: Fix
2252         reference to the wrong subclause of the standard.
2253         * testsuite/27_io/basic_istream/extractors_other/wchar_t/4.cc:
2254         Likewise.
2255         * testsuite/27_io/basic_ostream/inserters_other/char/6.cc:
2256         Likewise.
2257         * testsuite/27_io/basic_ostream/inserters_other/wchar_t/6.cc:
2258         Likewise.
2259         * testsuite/27_io/basic_ostream/inserters_other/char/99692.cc:
2260         New test.
2261         * testsuite/27_io/filesystem/path/io/dr2989.cc: Adjust pruned
2262         errors.
2263
2264 2021-05-06  Jonathan Wakely  <jwakely@redhat.com>
2265
2266         * include/bits/stl_algobase.h (__copy_move, __copy_move_backward):
2267         Improve static_assert messages.
2268         * testsuite/25_algorithms/copy/58982.cc: Adjust expected output.
2269         * testsuite/25_algorithms/copy_n/58982.cc: Likewise.
2270
2271 2021-05-06  Patrick Palka  <ppalka@redhat.com>
2272
2273         * include/std/ranges (filter_view::_Iterator::base): Make the
2274         const& overload unconstrained and return a const reference as
2275         per LWG 3533.  Make unconditionally noexcept.
2276         (transform_view::_Iterator::base): Likewise.
2277         (elements_view::_Iterator::base): Likewise.
2278
2279 2021-05-06  Patrick Palka  <ppalka@redhat.com>
2280
2281         * include/bits/stl_iterator.h (move_iterator::base): Make the
2282         const& overload unconstrained and return a const reference as
2283         per LWG 3391.  Make unconditionally noexcept.
2284         (counted_iterator::base): Likewise.
2285         * testsuite/24_iterators/move_iterator/lwg3391.cc: New test.
2286         * testsuite/24_iterators/move_iterator/move_only.cc: Adjust
2287         has_member_base concept to decay-copy the result of base().
2288
2289 2021-05-06  Jonathan Wakely  <jwakely@redhat.com>
2290
2291         * include/std/type_traits (remove_cvref_t): Define in terms of
2292         remove_cvref.
2293         * testsuite/20_util/remove_cvref/value.cc: Check alias.
2294
2295 2021-05-06  Jonathan Wakely  <jwakely@redhat.com>
2296
2297         Revert:
2298         2021-05-05  Jonathan Wakely  <jwakely@redhat.com>
2299
2300         * include/std/charconv (__from_chars_alnum): Pass unsigned
2301         char to std::isdigit.
2302
2303 2021-05-05  Patrick Palka  <ppalka@redhat.com>
2304
2305         * include/bits/ranges_util.h (enable_borrowed_range<subrange>):
2306         Remove constraints on this partial specialization.
2307         * include/std/ranges (enable_borrowed_range<iota_view>):
2308         Likewise.
2309
2310 2021-05-05  Patrick Palka  <ppalka@redhat.com>
2311
2312         * include/std/ranges (transform_view::_Iterator::iter_swap):
2313         Remove as per LWG 3520.
2314         (join_view::_Iterator::iter_swap): Add indirectly_swappable
2315         constraint as per LWG 3517.
2316
2317 2021-05-05  Jonathan Wakely  <jwakely@redhat.com>
2318
2319         * testsuite/20_util/function_objects/invoke/3.cc: Check feature
2320         test macro.
2321         * testsuite/20_util/function_objects/invoke/version.cc: New test.
2322
2323 2021-05-05  Jonathan Wakely  <jwakely@redhat.com>
2324
2325         * include/std/charconv (__from_chars_alnum): Pass unsigned
2326         char to std::isdigit.
2327
2328 2021-05-05  Corentin Gay  <gay@adacore.com>
2329
2330         * acinclude.m4: Add VxWorks-specific case for the
2331         configuration of ctypes.
2332         * configure: Regenerate.
2333         * config/locale/vxworks/ctype_members.cc: Add VxWorks-specific
2334         version.
2335         * config/os/vxworks/ctype_base.h: Adjust for VxWorks7+.
2336         * config/os/vxworks/ctype_configure_char.cc: Likewise.
2337         * config/os/vxworks/ctype_inline.h: Likewise.
2338         * testsuite/28_regex/traits/char/isctype.cc: Defines
2339         NEWLINE_IN_CLASS_BLANK if the target is VxWorks.
2340         * testsuite/28_regex/traits/wchar_t/isctype.cc: Likewise.
2341
2342 2021-05-04  Jonathan Wakely  <jwakely@redhat.com>
2343
2344         * include/std/future (promise::set_value): Check for existence
2345         of shared state before dereferncing it.
2346         (promise::set_exception, promise::set_value_at_thread_exit)
2347         (promise::set_exception_at_thread_exit): Likewise.
2348         (promise<R&>::set_value, promise<R&>::set_exception)
2349         (promise<R&>::set_value_at_thread_exit)
2350         (promise<R&>::set_exception_at_thread_exit): Likewise.
2351         (promise<void>::set_value, promise<void>::set_exception)
2352         (promise<void>::set_value_at_thread_exit)
2353         (promise<void>::set_exception_at_thread_exit): Likewise.
2354         * testsuite/30_threads/promise/members/at_thread_exit2.cc:
2355         Remove unused variable.
2356
2357 2021-05-04  Jonathan Wakely  <jwakely@redhat.com>
2358
2359         * include/bits/basic_string.h (basic_string(const CharT*, const A&)):
2360         Do not do arithmetic on null pointer.
2361
2362 2021-05-04  Jonathan Wakely  <jwakely@redhat.com>
2363
2364         * include/ext/pb_ds/detail/cc_hash_table_map_/cc_ht_map_.hpp
2365         (find_key_pointer(key_const_reference, false_type))
2366         (find_key_pointer(key_const_reference, true_type)): Do not
2367         dereference null pointer.
2368
2369 2021-05-04  Jonathan Wakely  <jwakely@redhat.com>
2370
2371         * testsuite/20_util/from_chars/3.cc: Use unsigned type to avoid
2372         overflow.
2373         * testsuite/24_iterators/reverse_iterator/2.cc: Do not add
2374         non-zero value to null pointer.
2375         * testsuite/25_algorithms/copy_backward/move_iterators/69478.cc:
2376         Use past-the-end iterator for result.
2377         * testsuite/25_algorithms/move_backward/69478.cc: Likewise.
2378         * testsuite/25_algorithms/move_backward/93872.cc: Likewise.
2379
2380 2021-05-04  Jonathan Wakely  <jwakely@redhat.com>
2381
2382         PR libstdc++/100384
2383         * include/std/variant (__get_t): New alias template yielding the
2384         return type of std::get<N> on a variant.
2385         (__visit_result_t): New alias template yielding the result of
2386         std::visit.
2387         (__same_types): Move into namespace __detail::__variant.
2388         (__check_visitor_results): Likewise. Use __invoke_result_t and
2389         __get_t.
2390         (__check_visitor_result): Remove.
2391         (visit): Use __visit_result_t for return type.
2392         * testsuite/20_util/variant/100384.cc: New test.
2393
2394 2021-05-04  Jonathan Wakely  <jwakely@redhat.com>
2395
2396         * acinclude.m4 (GLIBCXX_ENABLE_INT128_FLOAT128): Remove
2397         checks for __int128 and rename to GLIBCXX_ENABLE_FLOAT128.
2398         * config.h.in: Regenerate.
2399         * configure: Regenerate.
2400         * configure.ac: Adjust to use GLIBCXX_ENABLE_FLOAT128.
2401         * include/bits/random.h (_Select_uint_least_t<s, 1>):
2402         Use __SIZEOF_INT128__ to decide whether to use __int128.
2403         * include/std/charconv (__to_chars_unsigned_type): Likewise.
2404
2405 2021-05-03  Gerald Pfeifer  <gerald@pfeifer.com>
2406
2407         * doc/xml/manual/ctype.xml: Move unix.org reference to https.
2408         * doc/html/manual/facets.html: Regenerate.
2409
2410 2021-04-30  Patrick Palka  <ppalka@redhat.com>
2411
2412         * include/std/ranges (__detail::__non_propating_cache): Define
2413         as per P2328.
2414         (join_view): Remove constraints on the value and reference types
2415         of the wrapped iterator type as per P2328.
2416         (join_view::_Iterator::_M_satisfy): Adjust as per P2328.
2417         (join_view::_Iterator::operator++): Likewise.
2418         (join_view::_M_inner): Use __non_propating_cache as per P2328.
2419         Remove now-redundant use of __maybe_present_t.
2420         * testsuite/std/ranges/adaptors/join.cc: Include <array>.
2421         (test10): New test.
2422
2423 2021-04-30  Jonathan Wakely  <jwakely@redhat.com>
2424
2425         * include/bits/basic_string.h (__cpp_lib_constexpr_string):
2426         Only define for C++17 and later.
2427         * include/std/version (__cpp_lib_semaphore): Fix condition
2428         to match the one in <semaphore>.
2429
2430 2021-04-30  Jonathan Wakely  <jwakely@redhat.com>
2431
2432         * acinclude.m4 (GLIBCXX_CHECK_INT64_T): Delete.
2433         * config.h.in: Regenerate.
2434         * configure: Regenerate.
2435         * configure.ac: Do not use GLIBCXX_CHECK_INT64_T.
2436         * include/bits/postypes.h: Remove include of <stdint.h> and
2437         definition/undefinition of the __STDC_LIMIT_MACROS and
2438         __STDC_CONSTANT_MACROS macros.
2439         (streamoff): Use __INT64_TYPE__ if defined.
2440
2441 2021-04-30  Patrick Palka  <ppalka@redhat.com>
2442
2443         * include/std/ranges (split_view::_InnerIter::operator++):
2444         Depend on _Base instead of _Vp directly, as per LWG 3532.
2445
2446 2021-04-30  Patrick Palka  <ppalka@redhat.com>
2447
2448         * include/bits/ranges_util.h (subrange::subrange): Avoid
2449         list-initialization in delegating constructor.
2450         * include/std/ranges (single_view): Replace implicit guide
2451         with explicit deduction guide that decays its argument.
2452         (_Single::operator()): Avoid CTAD when constructing the
2453         single_view object.
2454         (_Iota::operator()): Avoid list-initialization.
2455         (__detail::__can_filter_view, _Filter::operator()): Likewise.
2456         (__detail::__can_transform_view, _Transform::operator()): Likewise.
2457         (take_view::begin): Likewise.
2458         (__detail::__can_take_view, _Take::operator()): Likewise.
2459         (__detail::__can_take_while_view, _TakeWhile::operator()): Likewise.
2460         (__detail::__can_drop_view, _Drop::operator()): Likewise.
2461         (__detail::__can_drop_while_view, _DropWhile::operator()): Likewise.
2462         (split_view::split_view): Use views::single when initializing
2463         _M_pattern.
2464         (__detail::__can_split_view, _Split::operator()): Avoid
2465         list-initialization.
2466         (_Counted::operator()): Likewise.
2467         * testsuite/std/ranges/p2367.cc: New test.
2468
2469 2021-04-30  Jonathan Wakely  <jwakely@redhat.com>
2470
2471         PR libstdc++/60497
2472         * include/bits/basic_ios.tcc (basic_ios::copyfmt): use
2473         std::addressof.
2474         * include/bits/basic_string.tcc (basic_string::swap)
2475         (basic_string::assign): Likewise.
2476         * include/bits/deque.tcc (deque::operator=(const deque&)):
2477         Likewise.
2478         * include/bits/stl_tree.h (_Rb_tree::operator=(const * _Rb_tree&)):
2479         Likewise.
2480         * include/bits/vector.tcc (vector::operator=(const vector&)):
2481         Likewise.
2482
2483 2021-04-30  Jonathan Wakely  <jwakely@redhat.com>
2484
2485         * include/std/istream (operator>>(Istream&&, x&)): Simplify, as
2486         per LWG 1203.
2487         * include/std/ostream (operator<<(Ostream&&, const x&)):
2488         Likewise.
2489         * testsuite/27_io/basic_istream/extractors_character/char/lwg2499_neg.cc:
2490         Adjust dg-error pattern.
2491         * testsuite/27_io/basic_istream/extractors_character/wchar_t/lwg2499_neg.cc:
2492         Likewise.
2493         * testsuite/27_io/basic_istream/extractors_other/char/4.cc: Define
2494         is_extractable trait to replace std::__is_extractable. Make it
2495         work with rvalue streams as well as lvalues, to replace f() and
2496         g() helper functions.
2497         * testsuite/27_io/basic_istream/extractors_other/wchar_t/4.cc:
2498         Likewise.
2499         * testsuite/27_io/basic_ostream/inserters_other/char/6.cc:
2500         Define is_insertable trait to replace std::__is_insertable. Make
2501         it work with rvalue streams as well as lvalues, to replace f()
2502         and g() helper functions.
2503         * testsuite/27_io/basic_ostream/inserters_other/wchar_t/6.cc:
2504         Likewise.
2505         * testsuite/27_io/filesystem/path/io/dr2989.cc: Prune additional
2506         errors from new constraints.
2507         * testsuite/27_io/rvalue_streams-2.cc: Remove PR 80675 checks,
2508         which are no longer expected to compile.
2509         * testsuite/27_io/rvalue_streams.cc: Adjust existing test.
2510         Verify LWG 1203 changes.
2511
2512 2021-04-30  Jonathan Wakely  <jwakely@redhat.com>
2513
2514         PR libstdc++/100285
2515         * include/experimental/socket (__basic_socket_impl::set_option)
2516         (__basic_socket_impl::get_option) [!_GLIBCXX_HAVE_SYS_SOCKET_H]:
2517         Just set error code.
2518         * testsuite/experimental/net/socket/socket_base.cc: CHeck
2519         for <sys/socket.h> not <socket.h>.
2520
2521 2021-04-30  Jonathan Wakely  <jwakely@redhat.com>
2522
2523         PR libstdc++/100180
2524         PR libstdc++/100286
2525         PR libstdc++/100351
2526         * testsuite/experimental/net/internet/address/v4/comparisons.cc:
2527         Use new effective-target keyword.
2528         * testsuite/experimental/net/internet/address/v4/cons.cc:
2529         Likewise.
2530         * testsuite/experimental/net/internet/address/v4/creation.cc:
2531         Likewise.
2532         * testsuite/experimental/net/internet/address/v4/members.cc:
2533         Likewise.
2534         * testsuite/experimental/net/internet/address/v6/members.cc:
2535         Likewise.
2536         * testsuite/experimental/net/internet/resolver/base.cc:
2537         Likewise.
2538         * testsuite/experimental/net/internet/resolver/ops/lookup.cc:
2539         Likewise.
2540         * testsuite/experimental/net/internet/resolver/ops/reverse.cc:
2541         Likewise.
2542         * testsuite/experimental/net/internet/socket/opt.cc:
2543         Likewise.
2544         * testsuite/experimental/net/internet/tcp.cc:
2545         Likewise.
2546         * testsuite/experimental/net/internet/udp.cc:
2547         Likewise.
2548         * testsuite/lib/libstdc++.exp (check_effective_target_net_ts_ip):
2549         New proc to check net_ts_ip et.
2550
2551 2021-04-28  Jonathan Wakely  <jwakely@redhat.com>
2552
2553         PR libstdc++/97930
2554         * testsuite/20_util/pair/requirements/structural.cc: New test.
2555
2556 2021-04-28  Jonathan Wakely  <jwakely@redhat.com>
2557
2558         * include/bits/stl_pair.h (pair) [__cplusplus > 202002]: Add
2559         new definitions for constructors and assignment operators using
2560         concepts for constraints.
2561         * testsuite/20_util/pair/cons/99957.cc: Disable for C++20 and
2562         later.
2563         * testsuite/20_util/pair/cons/explicit_construct.cc: Adjust
2564         expected error messages to also match C++20 errors.
2565
2566 2021-04-28  Jonathan Wakely  <jwakely@redhat.com>
2567
2568         PR libstdc++/99957
2569         * include/bits/stl_pair.h (_PCC::_MoveCopyPair, _PCC::_CopyMovePair):
2570         Combine and replace with ...
2571         (_PCC::_DeprConsPair): New SFINAE helper function.
2572         (pair): Merge preprocessor blocks so that all C++03 members
2573         are defined together at the end.
2574         (pair::pair(const _T1&, _U2&&), pair::pair(_U1&&, const _T2&)):
2575         Replace _T1 and _T2 parameters with __null_ptr_constant and
2576         adjust constraints.
2577         * testsuite/20_util/pair/40925.cc: Use nullptr instead of 0.
2578         * testsuite/20_util/pair/cons/explicit_construct.cc: Likewise.
2579         * testsuite/20_util/pair/cons/99957.cc: New test.
2580
2581 2021-04-28  Jonathan Wakely  <jwakely@redhat.com>
2582
2583         * include/bits/basic_string.h (__cpp_lib_constexpr_string): Define.
2584         * include/std/version (__cpp_lib_constexpr_string): Define.
2585         * testsuite/21_strings/char_traits/requirements/constexpr_functions_c++17.cc:
2586         Check for __cpp_lib_constexpr_string.
2587         * testsuite/21_strings/char_traits/requirements/constexpr_functions_c++20.cc:
2588         Likewise.
2589         * testsuite/21_strings/char_traits/requirements/version.cc: New test.
2590
2591 2021-04-28  Jonathan Wakely  <jwakely@redhat.com>
2592
2593         * doc/Makefile.am (stamp-pdf-doxygen): Improve comment about
2594         dealing with errors. Use '@' to prevent shell command being
2595         echoed.
2596         * doc/Makefile.in: Regenerate.
2597
2598 2021-04-28  Jonathan Wakely  <jwakely@redhat.com>
2599
2600         PR libstdc++/100298
2601         * include/bits/std_thread.h (thread::hardware_concurrency): Add
2602         missing noexcept to inline definition for non-gthreads targets.
2603
2604 2021-04-28  Patrick Palka  <ppalka@redhat.com>
2605
2606         PR libstdc++/100187
2607         PR libstdc++/100237
2608         PR libstdc++/100249
2609         PR libstdc++/100287
2610         * include/bits/ranges_algo.h (__search_n_fn::operator()): Give
2611         the __value_comp lambda an explicit bool return type.
2612         (__is_permutation_fn::operator()): Give the __proj_scan local
2613         variable auto&& return type.  Give the __comp_scan lambda an
2614         explicit bool return type.
2615         (__remove_fn::operator()): Give the __pred lambda an explicit
2616         bool return type.
2617         (__partition_fn::operator()): Don't std::move __first twice
2618         when returning an empty subrange.
2619         (__min_fn::operator()): Don't std::move __comp.
2620         (__max_fn::operator()): Likewise.
2621         (__minmax_fn::operator()): Likewise.
2622
2623 2021-04-27  Patrick Palka  <ppalka@redhat.com>
2624
2625         PR libstdc++/100290
2626         * include/std/ranges (join_view::_Iterator::operator++): Correct
2627         the return type of the lambda to avoid returning a copy of
2628         _M_parent->_M_inner.
2629         * testsuite/std/ranges/adaptors/join.cc (test10): New test.
2630
2631 2021-04-27  Jakub Jelinek  <jakub@redhat.com>
2632
2633         Revert:
2634         2021-04-22  Jakub Jelinek  <jakub@redhat.com>
2635
2636         PR target/100182
2637         * testsuite/29_atomics/atomic_float/1.cc: Add dg-xfail-run-if for
2638         ia32.
2639         * testsuite/29_atomics/atomic_float/wait_notify.cc: Add dg-skip-if for
2640         ia32.
2641
2642 2021-04-27  Jonathan Wakely  <jwakely@redhat.com>
2643
2644         * include/experimental/internet (address_v6::bytes_type): Adjust
2645         formatting.
2646         (basic_endpoint): Define _M_is_v6() to put all checks for
2647         AF_INET6 in one place.
2648         (basic_endpoint::resize): Simplify.
2649         (operator==(const tcp&, const tcp&)): Add constexpr and noexcept.
2650         (operator!=(const tcp&, const tcp&)): Likewise.
2651         (operator==(const udp&, const udp&)): Likewise.
2652         (operator!=(const udp&, const udp&)): Likewise.
2653         * testsuite/experimental/net/internet/tcp.cc: New test.
2654         * testsuite/experimental/net/internet/udp.cc: New test.
2655
2656 2021-04-27  Jonathan Wakely  <jwakely@redhat.com>
2657
2658         PR libstdc++/100286
2659         * include/experimental/internet (resolver_errc, resolver_category())
2660         (make_error_code, make_error_condition): Define unconditionally,
2661         only make enumerators and use of gai_strerror depend on the
2662         availability of <netdb.h>.
2663         (address_v4::to_string): Use correct constant for string length.
2664         (address_v4::to_string, address_v6::to_string): Define
2665         unconditionally, throw if unsupported.
2666         (make_address_v4, make_address_v6): Define unconditionally.
2667         Return an error if unsupported.
2668         (tcp, udp, v6_only, unicast::hops, multicast::*): Define
2669         conditionally,
2670         * testsuite/experimental/net/internet/socket/opt.cc: Check for
2671         <netinet/in.h> and <netinet/tcp.h> before using types from
2672         namespace net::ip.
2673
2674 2021-04-27  Jonathan Wakely  <jwakely@redhat.com>
2675
2676         PR libstdc++/100285
2677         * include/experimental/internet (resolver_base::flags):
2678         Define overloaded operators as hidden friends.
2679         * include/experimental/socket (socket_base::message_flags):
2680         Likewise.
2681
2682 2021-04-26  Jonathan Wakely  <jwakely@redhat.com>
2683
2684         * include/experimental/internet (tcp::no_delay, v6_only)
2685         (unicast::hops, multicast::hops, multicast::enable_loopback):
2686         Change access of base class and static data members. Add
2687         using-declaration for __socket_crtp::operator=(_Tp).
2688         (multicast::__mcastopt): New type.
2689         (multicast::join_group, multicast::leave_group): Derive from
2690         __mcastopt for common implementation.
2691         * include/experimental/socket: Add comment.
2692         * testsuite/experimental/net/internet/socket/opt.cc: New test.
2693         * testsuite/experimental/net/socket/socket_base.cc: Check for
2694         protected constructor/destructor of socket_base. Check for
2695         explicit constructors of socket option classes.
2696
2697 2021-04-26  Jonathan Wakely  <jwakely@redhat.com>
2698
2699         * include/experimental/bits/net.h (__socket_base): Add
2700         bool template parameter to allow BooleanSocketOption and
2701         IntegerSocketOption to have different __socket_base<int>
2702         base classes.
2703         (__socket_base<bool>): Adjust base class.
2704         (__socket_base<int>): Add partial specialization.
2705         (__socket_crtp::operator=(_Tp)): Add noexcept-specifier.
2706         * include/experimental/socket (socket_base::broadcast)
2707         (socket_base::debug, socket_base::do_not_route)
2708         (socket_base::keep_alive, socket_base::linger)
2709         (socket_base::out_of_band_inline)
2710         (socket_base::receive_buffer_size)
2711         (socket_base::receive_low_watermark)
2712         (socket_base::reuse_address, socket_base::send_buffer_size)
2713         (socket_base::send_low_watermark): Add using-declaration for
2714         __socket_crtp::operator=(_Tp).
2715         * testsuite/experimental/net/socket/socket_base.cc: Check
2716         properties of socket option types.
2717
2718 2021-04-26  Jonathan Wakely  <jwakely@redhat.com>
2719
2720         * include/experimental/internet (resolver_base::flags): Remove
2721         enumerators. Initialize constants directly with desired values.
2722         Make all operators constexpr and noexcept.
2723         * testsuite/experimental/net/internet/resolver/base.cc: Use
2724         __gnu_test::test_bitmask_values for bitmask type. Check
2725         construction and destruction is protected.
2726
2727 2021-04-26  Jonathan Wakely  <jwakely@redhat.com>
2728
2729         * include/bits/semaphore_base.h: Include <exception> and <errno.h>.
2730
2731 2021-04-26  Jonathan Wakely  <jwakely@redhat.com>
2732
2733         PR libstdc++/100259
2734         * include/experimental/internet (net::ip::make_error_code)
2735         (net::ip::make_error_condition, net::ip::make_network_v4)
2736         (net::ip::operator==(const udp&, const udp&)): Add 'inline'.
2737
2738 2021-04-24  David Edelsohn  <dje.gcc@gmail.com>
2739
2740         * testsuite/lib/dg-options.exp (atomic_link_flags): New.
2741         (add_options_for_libatomic): Use atomic_link_flags.
2742
2743 2021-04-23  Jonathan Wakely  <jwakely@redhat.com>
2744
2745         PR libstdc++/100180
2746         * include/experimental/io_context (io_context): Define
2747         dummy_pollfd type so that most member functions still compile
2748         without <poll.h> and struct pollfd.
2749
2750 2021-04-23  Jonathan Wakely  <jwakely@redhat.com>
2751
2752         * include/experimental/io_context (io_context::async_wait): Add
2753         comment.
2754         * include/experimental/socket (basic_socket::async_connect):
2755         Cast wait_type constant to int.
2756         (basic_datagram_socket::async_receive): Likewise.
2757         (basic_datagram_socket::async_receive_from): Likewise.
2758         (basic_datagram_socket::async_send): Likewise.
2759         (basic_datagram_socket::async_send_to): Likewise.
2760         (basic_stream_socket::async_receive): Likewise.
2761         (basic_stream_socket::async_send): Likewise. Use io_context
2762         parameter directly, instead of via an executor.
2763         (basic_socket_acceptor::async_accept): Likewise.
2764
2765 2021-04-23  Jonathan Wakely  <jwakely@redhat.com>
2766
2767         * include/experimental/socket (socket_base::shutdown_type):
2768         (socket_base::wait_type, socket_base::message_flags):
2769         Remove enumerators. Initialize constants directly with desired
2770         values.
2771         (socket_base::message_flags): Make all operators constexpr and
2772         noexcept.
2773         * testsuite/util/testsuite_common_types.h (test_bitmask_values):
2774         New test utility.
2775         * testsuite/experimental/net/socket/socket_base.cc: New test.
2776
2777 2021-04-22  David Edelsohn  <dje.gcc@gmail.com>
2778
2779         * config/os/aix/atomicity.h: Delete.
2780
2781 2021-04-22  Jonathan Wakely  <jwakely@redhat.com>
2782
2783         * include/bits/atomic_timed_wait.h (__cond_wait_until_impl):
2784         Handle system_clock as well as steady_clock.
2785         * testsuite/30_threads/semaphore/try_acquire_for.cc: Re-enable.
2786         * testsuite/30_threads/semaphore/try_acquire_until.cc:
2787         Re-enable.
2788
2789 2021-04-22  Jonathan Wakely  <jwakely@redhat.com>
2790
2791         * testsuite/30_threads/semaphore/try_acquire_posix.cc: Add
2792         options for libatomic.
2793
2794 2021-04-22  Jonathan Wakely  <jwakely@redhat.com>
2795
2796         * config/os/gnu-linux/os_defines.h: Fix type in comment.
2797
2798 2021-04-22  Jonathan Wakely  <jwakely@redhat.com>
2799
2800         PR libstdc++/99006
2801         * include/bits/shared_ptr.h (allocate_shared): Assert that _Tp
2802         is not an array type.
2803         * include/bits/shared_ptr_base.h (__allocate_shared): Likewise.
2804         * testsuite/20_util/shared_ptr/creation/99006.cc: New test.
2805
2806 2021-04-22  Thomas Rodgers  <rodgert@twrodgers.com>
2807
2808         * include/bits/atomic_wait.h: Always notify waiters in the
2809         case of 'bare' address notification.
2810
2811 2021-04-22  Jakub Jelinek  <jakub@redhat.com>
2812
2813         PR target/100182
2814         * testsuite/29_atomics/atomic_float/1.cc: Add dg-xfail-run-if for
2815         ia32.
2816         * testsuite/29_atomics/atomic_float/wait_notify.cc: Add dg-skip-if for
2817         ia32.
2818
2819 2021-04-22  Jonathan Wakely  <jwakely@redhat.com>
2820
2821         PR libstdc++/100179
2822         * include/bits/semaphore_base.h: Remove #error.
2823         * include/std/semaphore: Do not define anything unless one of
2824         the implementations is available.
2825
2826 2021-04-21  Thomas Rodgers  <rodgert@twrodgers.com>
2827
2828         * include/bits/semaphore_base.h: Always reload __old in
2829         __atomic_semaphore::_S_do_try_acquire().
2830         * testsuite/30_threads/stop_token/stop_callback/destroy.cc:
2831         re-enable testcase.
2832
2833 2021-04-21  Philippe Blain  <levraiphilippeblain@gmail.com>
2834             Jonathan Wakely  <jwakely@redhat.com>
2835
2836         PR libstdc++/99453
2837         * python/Makefile.am: Install libstdc++*-gdb.py more robustly.
2838         * python/Makefile.in: Regenerate.
2839
2840 2021-04-21  Thomas Rodgers  <rodgert@twrodgers.com>
2841
2842         * include/bits/semaphore_base.h: Add missing _M_try_acquire()
2843         member to __platform_wait.
2844
2845 2021-04-21  Jonathan Wakely  <jwakely@redhat.com>
2846
2847         * include/std/latch: Replace tab characters in license text.
2848         * include/std/semaphore: Likewise.
2849
2850 2021-04-21  Jakub Jelinek  <jakub@redhat.com>
2851
2852         PR libstdc++/100164
2853         * acinclude.m4: For POSIX semaphores AC_DEFINE HAVE_POSIX_SEMAPHORE
2854         rather than _GLIBCXX_HAVE_POSIX_SEMAPHORE.
2855         * configure: Regenerated.
2856         * config.h.in: Regenerated.
2857
2858 2021-04-20  Jonathan Wakely  <jwakely@redhat.com>
2859
2860         * testsuite/30_threads/semaphore/try_acquire_for.cc: Disable
2861         test for targets not using futexes for semaphores.
2862         * testsuite/30_threads/semaphore/try_acquire_until.cc: Likewise.
2863         * testsuite/30_threads/stop_token/stop_callback/destroy.cc:
2864         Disable for all targets.
2865
2866 2021-04-20  Thomas Rodgers  <trodgers@redhat.com>
2867
2868         * include/Makefile.am: Add new <bits/this_thread_sleep.h> header.
2869         * include/Makefile.in: Regenerate.
2870         * include/bits/this_thread_sleep.h: New file.
2871         * include/bits/atomic_base.h: Adjust all calls
2872         to __atomic_wait/__atomic_notify for new call signatures.
2873         * include/bits/atomic_timed_wait.h: Extensive rewrite.
2874         * include/bits/atomic_wait.h: Likewise.
2875         * include/bits/semaphore_base.h: Adjust all calls
2876         to __atomic_wait/__atomic_notify for new call signatures.
2877         * include/std/atomic: Likewise.
2878         * include/std/barrier: Likewise.
2879         * include/std/latch: Likewise.
2880         * include/std/semaphore: Likewise.
2881         * include/std/thread (this_thread::sleep_for)
2882         (this_thread::sleep_until): Move to new header.
2883         * testsuite/29_atomics/atomic/wait_notify/bool.cc: Simplify
2884         test.
2885         * testsuite/29_atomics/atomic/wait_notify/generic.cc: Likewise.
2886         * testsuite/29_atomics/atomic/wait_notify/pointers.cc: Likewise.
2887         * testsuite/29_atomics/atomic_flag/wait_notify/1.cc: Likewise.
2888         * testsuite/29_atomics/atomic_float/wait_notify.cc: Likewise.
2889         * testsuite/29_atomics/atomic_integral/wait_notify.cc: Likewise.
2890         * testsuite/29_atomics/atomic_ref/wait_notify.cc: Likewise.
2891
2892 2021-04-20  Patrick Palka  <ppalka@redhat.com>
2893
2894         PR libstdc++/95983
2895         * include/bits/stl_iterator.h (__detail::__move_iter_cat):
2896         Define.
2897         (move_iterator): Derive from the above in C++20 in order to
2898         conditionally define iterator_category as per P2259.
2899         (move_iterator::__base_cat): No longer used, so remove.
2900         (move_iterator::iterator_category): Remove in C++20.
2901         (__detail::__common_iter_use_postfix_proxy): Define.
2902         (common_iterator::_Proxy): Rename to ...
2903         (common_iterator:__arrow_proxy): ... this.
2904         (common_iterator::__postfix_proxy): Define as per P2259.
2905         (common_iterator::operator->): Adjust.
2906         (common_iterator::operator++): Adjust as per P2259.
2907         (iterator_traits<common_iterator>::_S_iter_cat): Define.
2908         (iterator_traits<common_iterator>::iterator_category): Change as
2909         per P2259.
2910         (__detail::__counted_iter_value_type): Define.
2911         (__detail::__counted_iter_concept): Define.
2912         (__detail::__counted_iter_cat): Define.
2913         (counted_iterator): Derive from the above three classes in order
2914         to conditionally define value_type, iterator_concept and
2915         iterator category respectively as per P2259.
2916         (counted_iterator::operator->): Define as per P2259.
2917         (incrementable_traits<counted_iterator>): Remove as per P2259.
2918         (iterator_traits<counted_iterator>): Adjust as per P2259.
2919         * include/std/ranges (__detail::__iota_view_iter_cat): Define.
2920         (iota_view::_Iterator): Derive from the above in order to
2921         conditionally define iterator_category as per P2259.
2922         (iota_view::_S_iter_cat): Rename to ...
2923         (iota_view::_S_iter_concept): ... this.
2924         (iota_view::iterator_concept): Use it to apply LWG 3291 changes.
2925         (iota_view::iterator_category): Remove.
2926         (__detail::__filter_view_iter_cat): Define.
2927         (filter_view::_Iterator): Derive from the above in order to
2928         conditionally define iterator_category as per P2259.
2929         (filter_view::_Iterator): Move to struct __filter_view_iter_cat.
2930         (filter_view::_Iterator::iterator_category): Remove.
2931         (transform_view::_Base): Define.
2932         (transform_view::__iter_cat): Define.
2933         (transform_view::_Iterator): Derive from the above in order to
2934         conditionally define iterator_category as per P2259.
2935         (transform_view::_Iterator::_Base): Just alias
2936         transform_view::_Base.
2937         (transform_view::_Iterator::_S_iter_cat): Move to struct
2938         transform_view::__iter_cat.
2939         (transform_view::_Iterator::iterator_category): Remove.
2940         (transform_view::_Sentinel::_Base): Just alias
2941         transform_view::_Base.
2942         (join_view::_Base): Define.
2943         (join_view::_Outer_iter): Define.
2944         (join_view::_Inner_iter): Define.
2945         (join_view::_S_ref_is_glvalue): Define.
2946         (join_view::__iter_cat): Define.
2947         (join_view::_Iterator): Derive from it in order to conditionally
2948         define iterator_category as per P2259.
2949         (join_view::_Iterator::_Base): Just alias join_view::_Base.
2950         (join_view::_Iterator::_S_ref_is_glvalue): Just alias
2951         join_view::_S_ref_is_glvalue.
2952         (join_view::_Iterator::_S_iter_cat): Move to struct
2953         transform_view::__iter_cat.
2954         (join_view::_Iterator::_Outer_iter): Just alias
2955         join_view::_Outer_iter.
2956         (join_view::_Iterator::_Inner_iter): Just alias
2957         join_view::_Inner_iter.
2958         (join_view::_Iterator::iterator_category): Remove.
2959         (join_view::_Sentinel::_Base): Just alias join_view::_Base.
2960         (__detail::__split_view_outer_iter_cat): Define.
2961         (__detail::__split_view_inner_iter_cat): Define.
2962         (split_view::_Base): Define.
2963         (split_view::_Outer_iter): Derive from __split_view_outer_iter_cat
2964         in order to conditionally define iterator_category as per P2259.
2965         (split_view::_Outer_iter::iterator_category): Remove.
2966         (split_view::_Inner_iter): Derive from __split_view_inner_iter_cat
2967         in order to conditionally define iterator_category as per P2259.
2968         (split_view::_Inner_iter::_S_iter_cat): Move to
2969         __split_view_inner_iter_cat.
2970         (split_view::_Inner_iter::iterator_category): Remove.
2971         (elements_view::_Base): Define.
2972         (elements_view::__iter_cat): Define.
2973         (elements_view::_Iterator): Derive from the above in order to
2974         conditionall define iterator_category as per P2259.
2975         (elements_view::_Iterator::_Base): Just alias
2976         elements_view::_Base.
2977         (elements_view::_Iterator::_S_iter_concept)
2978         (elements_view::_Iterator::iterator_concept): Define as per
2979         P2259.
2980         (elements_view::_Iterator::iterator_category): Remove.
2981         (elements_view::_Sentinel::_Base): Just alias
2982         elements_view::_Base.
2983         * testsuite/24_iterators/headers/iterator/synopsis_c++20.cc:
2984         Adjust constraints on iterator_traits<counted_iterator>.
2985         * testsuite/std/ranges/p2259.cc: New test.
2986
2987 2021-04-20  Jonathan Wakely  <jwakely@redhat.com>
2988
2989         PR libstdc++/100146
2990         * include/std/charconv (__cpp_lib_to_chars): Define
2991         conditionally.
2992         * include/std/version (__cpp_lib_to_chars): Likewise..
2993         * testsuite/20_util/from_chars/4.cc: Only check feature test
2994         macro, not _GLIBCXX_HAVE_USELOCALE.
2995         * testsuite/20_util/from_chars/5.cc: Likewise.
2996         * testsuite/20_util/from_chars/6.cc: Likewise.
2997         * testsuite/20_util/to_chars/long_double.cc: Likewise.
2998
2999 2021-04-20  Jakub Jelinek  <jakub@redhat.com>
3000
3001         * testsuite/util/testsuite_abi.cc (compare_symbols): If any symbol
3002         versions with _IEEE128_ substring are found, set ieee_version_found
3003         to true.  Ignore missing symbols with _IEEE128_ in version name if
3004         !ieee_version_found.  Use i->first as version_name instead of
3005         i->second.version_name if the latter is empty.
3006         * config/abi/post/powerpc64-linux-gnu/baseline_symbols.txt: Update.
3007
3008 2021-04-19  H.J. Lu  <hjl.tools@gmail.com>
3009
3010         * config/abi/post/x86_64-linux-gnu/x32/baseline_symbols.txt:
3011         Updated.
3012
3013 2021-04-17  Jakub Jelinek  <jakub@redhat.com>
3014
3015         * config/abi/post/powerpc-linux-gnu/baseline_symbols.txt: Update.
3016         * config/abi/post/powerpc64-linux-gnu/32/baseline_symbols.txt: Update.
3017
3018 2021-04-17  Jakub Jelinek  <jakub@redhat.com>
3019
3020         * config/abi/post/x86_64-linux-gnu/baseline_symbols.txt: Update.
3021         * config/abi/post/x86_64-linux-gnu/32/baseline_symbols.txt: Update.
3022         * config/abi/post/i386-linux-gnu/baseline_symbols.txt: Update.
3023         * config/abi/post/i486-linux-gnu/baseline_symbols.txt: Update.
3024         * config/abi/post/s390x-linux-gnu/baseline_symbols.txt: Update.
3025         * config/abi/post/powerpc64-linux-gnu/baseline_symbols.txt: Update.
3026
3027 2021-04-15  Jonathan Wakely  <jwakely@redhat.com>
3028
3029         * testsuite/lib/dg-options.exp (add_options_for_libatomic): Also
3030         add libatomic options for 32-bit sparc*-*-linux-gnu.
3031
3032 2021-04-15  Jonathan Wakely  <jwakely@redhat.com>
3033
3034         PR libstdc++/96657
3035         * libsupc++/Makefile.am: Add atomicity.cc here.
3036         * src/c++98/Makefile.am: Remove it from here.
3037         * libsupc++/Makefile.in: Regenerate.
3038         * src/c++98/Makefile.in: Regenerate.
3039         * testsuite/18_support/exception_ptr/96657.cc: New test.
3040
3041 2021-04-13  Jonathan Wakely  <jwakely@redhat.com>
3042
3043         PR libstdc++/100060
3044         * include/std/bit: Only include <ext/numeric_traits.h> for
3045         hosted build, use <limits> otherwise.
3046
3047 2021-04-13  Jonathan Wakely  <jwakely@redhat.com>
3048
3049         * doc/xml/manual/backwards_compatibility.xml: Remove porting
3050         notes for libg++ and libstdc++-v2, and bibliography.
3051         * doc/html/*: Regenerated.
3052
3053 2021-04-12  Jonathan Wakely  <jwakely@redhat.com>
3054
3055         PR libstdc++/100044
3056         * include/bits/ranges_util.h (__detail::__iterator_sentinel_pair):
3057         Remove helper concept.
3058         (subrange(_Pr), subrange(Pr, __make_unsigned_like<...>)): Remove
3059         deduction guides, as per LWG 3404.
3060         * testsuite/std/ranges/subrange/lwg3282_neg.cc: Check that class
3061         template argument deduction fails.
3062
3063 2021-04-12  Jonathan Wakely  <jwakely@redhat.com>
3064
3065         * testsuite/26_numerics/random/linear_congruential_engine/requirements/non_uint_neg.cc:
3066         Adjust expected error for C++20 mode.
3067         * testsuite/tr1/5_numerical_facilities/random/linear_congruential/requirements/non_uint_neg.cc:
3068         Likewise.
3069
3070 2021-04-12  Jonathan Wakely  <jwakely@redhat.com>
3071
3072         PR libstdc++/99995
3073         * testsuite/17_intro/headers/c++1998/49745.cc: Include all
3074         standard headers and XFAIL for effective-target c++20.
3075
3076 2021-04-09  François Dumont  <fdumont@gcc.gnu.org>
3077
3078         PR libstdc++/99402
3079         * include/debug/helper_functions.h (__can_advance(_InputIterator,
3080         const std::pair<_Diff, _Distance_precision>&, int)): New.
3081         (__can_advance(const _Safe_iterator<>&,
3082         const std::pair<_Diff, _Distance_precision>&, int)): New.
3083         * include/debug/macros.h (__glibcxx_check_can_increment_dist): New,
3084         use latter.
3085         (__glibcxx_check_can_increment_range): Adapt to use latter.
3086         (__glibcxx_check_can_decrement_range): Likewise.
3087         * include/debug/safe_iterator.h
3088         (_Safe_iterator<>::_M_can_advance(const std::pair<_Diff, _Distance_precision>&,
3089         int)): New.
3090         (__can_advance(const _Safe_iterator<>&,
3091         const std::pair<_Diff, _Distance_precision>&, int)): New.
3092         * include/debug/safe_iterator.tcc
3093         (_Safe_iterator<>::_M_can_advance(const std::pair<_Diff, _Distance_precision>&,
3094         int)): New.
3095         (_Safe_iterator<>::_M_valid_range(const _Safe_iterator<>&,
3096         std::pair<difference_type, _Distance_precision>&, bool)): Adapt for
3097         __dp_sign_max_size.
3098         (__copy_move_a): Adapt to use __glibcxx_check_can_increment_dist.
3099         (__copy_move_backward_a): Likewise.
3100         (__equal_aux): Likewise.
3101         * include/debug/stl_iterator.h (__can_advance(const std::reverse_iterator<>&,
3102         const std::pair<_Diff, _Distance_precision>&, int)): New.
3103         (__can_advance(const std::move_iterator<>&,
3104         const std::pair<_Diff, _Distance_precision>&, int)): New.
3105         * testsuite/25_algorithms/copy/debug/99402.cc: New test.
3106
3107 2021-04-09  Jonathan Wakely  <jwakely@redhat.com>
3108
3109         PR libstdc++/99985
3110         * include/bits/hashtable.h (_Hashtable::_S_nothrow_move()): Fix
3111         to be a valid constexpr function in C++11.
3112         * testsuite/23_containers/unordered_set/cons/99985.cc: New test.
3113
3114 2021-04-09  Jonathan Wakely  <jwakely@redhat.com>
3115
3116         * include/bits/fs_fwd.h: Fix doxygen group command.
3117         * include/bits/streambuf_iterator.h: Likewise.
3118         * include/bits/uses_allocator_args.h: Likewise.
3119         * include/std/memory: Likewise.
3120         * include/tr1/complex: Likewise.
3121
3122 2021-04-08  Jonathan Wakely  <jwakely@redhat.com>
3123
3124         * include/bits/basic_string.h: Tweak doxygen comment.
3125
3126 2021-04-08  Patrick Palka  <ppalka@redhat.com>
3127
3128         * include/std/ranges (__detail::find): Define.
3129         (split_view::_OuterIter::operator++): Apply proposed resolution
3130         of LWG 3505.
3131         * testsuite/std/ranges/adaptors/split.cc (test10): New test.
3132
3133 2021-04-08  Patrick Palka  <ppalka@redhat.com>
3134
3135         * include/std/ranges (__detail::find_if): Simplify.
3136         (__detail::find_if_not): Likewise.
3137         (__detail::min): Remove.
3138         (__detail::mismatch): Simplify.
3139         (take_view::size): Use std::min instead of __detail::min.
3140
3141 2021-04-08  Patrick Palka  <ppalka@redhat.com>
3142
3143         * include/std/ranges (__detail::__returnable_element): New
3144         concept.
3145         (elements_view): Use this concept in its constraints.  Add
3146         missing private access specifier.
3147         (elements_view::_S_get_element): Define as per LWG 3502.
3148         (elements_view::operator*, elements_view::operator[]): Use
3149         _S_get_element.
3150         (elements_view::operator++): Remove unnecessary constraint
3151         as per LWG 3492.
3152         * testsuite/std/ranges/adaptors/elements.cc (test05): New test.
3153
3154 2021-04-08  Jonathan Wakely  <jwakely@redhat.com>
3155
3156         * doc/Makefile.am (stamp-pdf-doxygen): Also grep for
3157         out-of-memory error in log file.
3158         * doc/Makefile.in: Regenerate.
3159
3160 2021-04-08  Jonathan Wakely  <jwakely@redhat.com>
3161
3162         * configure: Regenerate.
3163
3164 2021-04-08  Jonathan Wakely  <jwakely@redhat.com>
3165
3166         * include/bits/random.h: Fix doxygen group commands.
3167         * include/bits/regex_constants.h: Likewise.
3168         * include/tr1/random.h: Likewise.
3169
3170 2021-04-08  Jonathan Wakely  <jwakely@redhat.com>
3171
3172         * include/bits/hashtable.h (_Hashtable::_S_nothrow_move()):
3173         New function to determine noexcept-specifier for move
3174         constructors.
3175         (_Hashtable): Use _S_nothrow_move() on move constructors.
3176         * testsuite/23_containers/unordered_map/cons/noexcept_move_construct.cc:
3177         Correct static assertion message.
3178         * testsuite/23_containers/unordered_multimap/cons/noexcept_move_construct.cc:
3179         Likewise.
3180         * testsuite/23_containers/unordered_multiset/cons/noexcept_move_construct.cc:
3181         Likewise.
3182         * testsuite/23_containers/unordered_set/cons/noexcept_move_construct.cc:
3183         Likewise.
3184
3185 2021-04-08  Patrick Palka  <ppalka@redhat.com>
3186
3187         PR libstdc++/98384
3188         * testsuite/20_util/to_chars/long_double.cc: Don't run the test
3189         on targets without a large long double.  XFAIL the execution on
3190         targets with a non-conforming printf.
3191
3192 2021-04-08  Patrick Palka  <ppalka@redhat.com>
3193
3194         PR libstdc++/99433
3195         * include/std/ranges (__adaptor::__maybe_refwrap): Remove.
3196         (__adaptor::__adaptor_invocable): New concept.
3197         (__adaptor::__adaptor_partial_app_viable): New concept.
3198         (__adaptor::_RangeAdaptorClosure): Rewrite, turning it into a
3199         non-template base class.
3200         (__adaptor::_RangeAdaptor): Rewrite, turning it into a CRTP base
3201         class template.
3202         (__adaptor::_Partial): New class template that represents
3203         partial application of a range adaptor non-closure.
3204         (__adaptor::__pipe_invocable): New concept.
3205         (__adaptor::_Pipe): New class template.
3206         (__detail::__can_ref_view): New concept.
3207         (__detail::__can_subrange): New concept.
3208         (all): Replace the lambda here with ...
3209         (_All): ... this functor.  Add appropriate constraints.
3210         (__detail::__can_filter_view): New concept.
3211         (filter, _Filter): As in all/_All.
3212         (__detail::__can_transform): New concept.
3213         (transform, _Transform): As in all/_All.
3214         (__detail::__can_take_view): New concept.
3215         (take, _Take): As in all/_All.
3216         (__detail::__can_take_while_view): New concept.
3217         (take_while, _TakeWhile): As in all/_All.
3218         (__detail::__can_drop_view): New concept.
3219         (drop, _Drop): As in all/_All.
3220         (__detail::__can_drop_while_view): New concept.
3221         (drop_while, _DropWhile): As in all/_All.
3222         (__detail::__can_join_view): New concept.
3223         (join, _Join): As in all/_All.
3224         (__detail::__can_split_view): New concept.
3225         (split, _Split): As in all/_All.  Rename template parameter
3226         _Fp to _Pattern.
3227         (__detail::__already_common): New concept.
3228         (__detail::__can_common_view): New concept.
3229         (common, _Common): As in all/_All.
3230         (__detail::__can_reverse_view): New concept.
3231         (reverse, _Reverse): As in all/_All.
3232         (__detail::__can_elements_view): New concept.
3233         (elements, _Elements): As in all/_All.
3234         (keys, values): Adjust.
3235         * testsuite/std/ranges/adaptors/99433.cc: New test.
3236         * testsuite/std/ranges/adaptors/all.cc: No longer expect that
3237         adding empty range adaptor closure objects to a pipeline doesn't
3238         increase the size of the pipeline.
3239         (test05): New test.
3240         * testsuite/std/ranges/adaptors/common.cc (test03): New test.
3241         * testsuite/std/ranges/adaptors/drop.cc (test09): New test.
3242         * testsuite/std/ranges/adaptors/drop_while.cc (test04): New test.
3243         * testsuite/std/ranges/adaptors/elements.cc (test04): New test.
3244         * testsuite/std/ranges/adaptors/filter.cc (test06): New test.
3245         * testsuite/std/ranges/adaptors/join.cc (test09): New test.
3246         * testsuite/std/ranges/adaptors/p2281.cc: New test.
3247         * testsuite/std/ranges/adaptors/reverse.cc (test07): New test.
3248         * testsuite/std/ranges/adaptors/split.cc (test01, test04):
3249         Adjust.
3250         (test09): New test.
3251         * testsuite/std/ranges/adaptors/split_neg.cc (test01): Adjust
3252         expected error message.
3253         (test02): Likewise.  Extend test.
3254         * testsuite/std/ranges/adaptors/take.cc (test06): New test.
3255         * testsuite/std/ranges/adaptors/take_while.cc (test05): New test.
3256         * testsuite/std/ranges/adaptors/transform.cc (test07, test08):
3257         New test.
3258
3259 2021-04-08  Jonathan Wakely  <jwakely@redhat.com>
3260
3261         * include/std/string_view: Adjust Doxygen @file comment.
3262
3263 2021-04-08  Jonathan Wakely  <jwakely@redhat.com>
3264
3265         * include/std/type_traits (is_scoped_enum<T>): Constrain partial
3266         specialization to not match incomplete enum types. Use a
3267         requires-expression instead of instantiating is_convertible.
3268         (is_scoped_enum<const T>): Add as workaround for PR c++/99968.
3269         * testsuite/20_util/is_scoped_enum/value.cc: Check with
3270         incomplete types and opaque-enum-declarations.
3271
3272 2021-04-07  Jonathan Wakely  <jwakely@redhat.com>
3273
3274         PR libstdc++/99805
3275         * src/c++17/fs_path.cc (path::_M_split_cmpts): Do not call
3276         non-const member on _M_pathname, to avoid copy-on-write.
3277         * testsuite/27_io/filesystem/path/decompose/parent_path.cc:
3278         Check construction from strings that might be shared.
3279
3280 2021-04-06  Jonathan Wakely  <jwakely@redhat.com>
3281
3282         * include/bits/move.h (forward, move, move_if_noexcept)
3283         (addressof): Add _GLIBCXX_NODISCARD.
3284         * include/bits/ranges_cmp.h (identity::operator()): Add
3285         nodiscard attribute.
3286         * include/c_global/cstddef (to_integer): Likewise.
3287         * include/std/bit (bit_cast): Likewise.
3288         * include/std/utility (as_const, to_underlying): Likewise.
3289
3290 2021-04-06  Jonathan Wakely  <jwakely@redhat.com>
3291
3292         * include/bits/move.h (forward): Change static_assert message
3293         to be unambiguous about what must be true.
3294         * testsuite/20_util/forward/c_neg.cc: Adjust dg-error.
3295         * testsuite/20_util/forward/f_neg.cc: Likewise.
3296
3297 2021-04-06  Jonathan Wakely  <jwakely@redhat.com>
3298
3299         * include/bits/alloc_traits.h: Use markdown for code font.
3300         * include/bits/basic_string.h: Fix @param names.
3301         * include/bits/max_size_type.h: Remove period after @file.
3302         * include/bits/regex.h: Fix duplicate @retval names, and rename.
3303         * include/ext/pb_ds/detail/priority_queue_base_dispatch.hpp: Add
3304         group open to match existing group close.
3305         * include/ext/pb_ds/priority_queue.hpp: Add blank line before group
3306         open.
3307
3308 2021-04-06  Jonathan Wakely  <jwakely@redhat.com>
3309
3310         * include/bits/atomic_base.h: Fix doxygen group close.
3311         * include/bits/basic_ios.h: Likewise.
3312         * include/bits/forward_list.h: Likewise.
3313         * include/bits/fs_dir.h: Likewise.
3314         * include/bits/fs_ops.h: Likewise.
3315         * include/bits/fs_path.h: Likewise.
3316         * include/bits/functional_hash.h: Likewise.
3317         * include/bits/gslice.h: Likewise.
3318         * include/bits/gslice_array.h: Likewise.
3319         * include/bits/hashtable_policy.h: Likewise.
3320         * include/bits/indirect_array.h: Likewise.
3321         * include/bits/locale_classes.h: Likewise.
3322         * include/bits/locale_facets.h: Likewise.
3323         * include/bits/locale_facets_nonio.h: Likewise.
3324         * include/bits/mask_array.h: Likewise.
3325         * include/bits/refwrap.h: Likewise.
3326         * include/bits/regex.h: Likewise.
3327         * include/bits/regex_automaton.h: Likewise.
3328         * include/bits/regex_compiler.h: Likewise.
3329         * include/bits/regex_constants.h: Likewise.
3330         * include/bits/regex_error.h: Likewise.
3331         * include/bits/regex_executor.h: Likewise.
3332         * include/bits/regex_scanner.h: Likewise.
3333         * include/bits/shared_ptr.h: Likewise.
3334         * include/bits/shared_ptr_atomic.h: Likewise.
3335         * include/bits/shared_ptr_base.h: Likewise.
3336         * include/bits/slice_array.h: Likewise.
3337         * include/bits/specfun.h: Likewise.
3338         * include/bits/std_function.h: Likewise.
3339         * include/bits/std_mutex.h: Likewise.
3340         * include/bits/stl_deque.h: Likewise.
3341         * include/bits/stl_iterator.h: Likewise.
3342         * include/bits/stl_iterator_base_types.h: Likewise.
3343         * include/bits/stl_map.h: Likewise.
3344         * include/bits/stl_multimap.h: Likewise.
3345         * include/bits/stl_multiset.h: Likewise.
3346         * include/bits/stl_numeric.h: Likewise.
3347         * include/bits/stl_pair.h: Likewise.
3348         * include/bits/stl_set.h: Likewise.
3349         * include/bits/stl_uninitialized.h: Likewise.
3350         * include/bits/stream_iterator.h: Likewise.
3351         * include/bits/streambuf_iterator.h: Likewise.
3352         * include/bits/unique_ptr.h: Likewise.
3353         * include/bits/unordered_map.h: Likewise.
3354         * include/bits/unordered_set.h: Likewise.
3355         * include/decimal/decimal: Likewise.
3356         * include/experimental/any: Likewise.
3357         * include/experimental/array: Likewise.
3358         * include/experimental/bits/fs_dir.h: Likewise.
3359         * include/experimental/bits/fs_fwd.h: Likewise.
3360         * include/experimental/bits/fs_ops.h: Likewise.
3361         * include/experimental/bits/fs_path.h: Likewise.
3362         * include/experimental/buffer: Likewise.
3363         * include/experimental/internet: Likewise.
3364         * include/experimental/optional: Likewise.
3365         * include/experimental/propagate_const: Likewise.
3366         * include/experimental/socket: Likewise.
3367         * include/ext/pb_ds/assoc_container.hpp: Likewise.
3368         * include/ext/pb_ds/detail/priority_queue_base_dispatch.hpp:
3369         Likewise.
3370         * include/ext/pb_ds/detail/tree_policy/node_metadata_selector.hpp: Likewise.
3371         * include/ext/pb_ds/detail/trie_policy/node_metadata_selector.hpp: Likewise.
3372         * include/ext/pb_ds/detail/types_traits.hpp: Likewise.
3373         * include/ext/pb_ds/exception.hpp: Likewise.
3374         * include/ext/pb_ds/priority_queue.hpp: Likewise.
3375         * include/ext/pb_ds/tag_and_trait.hpp: Likewise.
3376         * include/ext/random: Likewise.
3377         * include/std/any: Likewise.
3378         * include/std/atomic: Likewise.
3379         * include/std/bitset: Likewise.
3380         * include/std/chrono: Likewise.
3381         * include/std/complex: Likewise.
3382         * include/std/condition_variable: Likewise.
3383         * include/std/fstream: Likewise.
3384         * include/std/future: Likewise.
3385         * include/std/iostream: Likewise.
3386         * include/std/istream: Likewise.
3387         * include/std/mutex: Likewise.
3388         * include/std/numeric: Likewise.
3389         * include/std/ostream: Likewise.
3390         * include/std/ratio: Likewise.
3391         * include/std/shared_mutex: Likewise.
3392         * include/std/stdexcept: Likewise.
3393         * include/std/streambuf: Likewise.
3394         * include/std/system_error: Likewise.
3395         * include/std/thread: Likewise.
3396         * include/std/valarray: Likewise.
3397         * include/std/variant: Likewise.
3398         * include/tr1/cmath: Likewise.
3399         * include/tr1/regex: Likewise.
3400         * include/tr2/dynamic_bitset: Likewise.
3401         * libsupc++/atomic_lockfree_defines.h: Likewise.
3402         * libsupc++/exception: Likewise.
3403         * libsupc++/exception.h: Likewise.
3404         * libsupc++/exception_ptr.h: Likewise.
3405         * libsupc++/nested_exception.h: Likewise.
3406
3407 2021-03-31  Alexandre Oliva  <oliva@adacore.com>
3408
3409         * testsuite/30_threads/future/members/poll.cc: Use faster
3410         after-ready call in the calibration loop.
3411
3412 2021-03-29  Jonathan Wakely  <jwakely@redhat.com>
3413
3414         * doc/xml/manual/status_cxx2017.xml: Adjust link for PSTL.
3415         * doc/html/manual/status.html: Regenerate.
3416
3417 2021-03-28  François Dumont  <fdumont@gcc.gnu.org>
3418
3419         * include/debug/forward_list
3420         (forward_list(forward_list&&, const allocator_type&)): Add noexcept qualification.
3421         * include/debug/list (list(list&&, const allocator_type&)): Likewise and add
3422         call to safe container allocator aware move constructor.
3423         * include/debug/vector (vector(vector&&, const allocator_type&)):
3424         Fix noexcept qualification.
3425         * testsuite/23_containers/forward_list/cons/noexcept_move_construct.cc:
3426         Add allocator-extended move constructor noexceot qualification check.
3427         * testsuite/23_containers/list/cons/noexcept_move_construct.cc: Likewise.
3428
3429 2021-03-26  Jonathan Wakely  <jwakely@redhat.com>
3430
3431         * src/c++11/random.cc (USE_LCG): Define when a pseudo-random
3432         fallback is needed.
3433         [USE_LCG] (bad_seed, construct_lcg_at, destroy_lcg_at, __lcg):
3434         New helper functions and callback.
3435         (random_device::_M_init): Add 'prng' and 'all' enumerators.
3436         Replace switch with fallthrough with a series of 'if' statements.
3437         [USE_LCG]: Construct an lcg_type engine and use __lcg when cpuid
3438         checks fail.
3439         (random_device::_M_init_pretr1) [USE_MT19937]: Accept "prng"
3440         token.
3441         (random_device::_M_getval): Check for callback unconditionally
3442         and always pass _M_file pointer.
3443         * testsuite/26_numerics/random/random_device/85494.cc: Remove
3444         effective-target check. Use new random_device_available helper.
3445         * testsuite/26_numerics/random/random_device/94087.cc: Likewise.
3446         * testsuite/26_numerics/random/random_device/cons/default-cow.cc:
3447         Remove effective-target check.
3448         * testsuite/26_numerics/random/random_device/cons/default.cc:
3449         Likewise.
3450         * testsuite/26_numerics/random/random_device/cons/token.cc: Use
3451         new random_device_available helper. Test "prng" token.
3452         * testsuite/util/testsuite_random.h (random_device_available):
3453         New helper function.
3454
3455 2021-03-25  François Dumont  <fdumont@gcc.gnu.org>
3456
3457         * include/debug/string
3458         (basic_string(const basic_string&, const _Alloc&)): Define even if !_GLIBCXX_USE_CXX11_ABI.
3459         (basic_string(basic_string&&, const _Alloc&)): Likewise and add noexcept qualification.
3460         (basic_string<>::erase): Adapt to take __const_iterator.
3461         (basic_string(const _CharT*, const _Allocator&)): Remove assign call.
3462         (basic_string<>::insert(const_iterator, _InputIte, _InputIte)): Try to
3463         remove iterator debug layer even if !_GLIBCXX_USE_CXX11_ABI.
3464         [_GLIBCXX_USE_CHAR8_T] (__gnu_debug::u8string): New.
3465         (__gnu_debug::u16string, __gnu_debug::u32string): New.
3466         (std::hash<__gnu_debug::basic_string<>>): New partial specialization.
3467         (std::__is_fast_hash<__gnu_debug::basic_string<>>): Likewise.
3468         * testsuite/util/exception/safety.h
3469         (erase_base<__gnu_debug::basic_string<>>): New partial specialization.
3470         (insert_base<__gnu_debug::basic_string<>>): Likewise.
3471         * testsuite/util/testsuite_container_traits.h (traits<__gnu_debug::basic_string<>>):
3472         New partial specialization.
3473         * testsuite/21_strings/basic_string/hash/debug.cc: New test.
3474         * testsuite/21_strings/basic_string/requirements/citerators.cc:
3475         Add test on __gnu_debug::string.
3476         * testsuite/21_strings/basic_string/requirements/dr438/constructor.cc: Likewise.
3477         * testsuite/21_strings/basic_string/requirements/exception/basic.cc: Likewise.
3478         * testsuite/21_strings/basic_string/requirements/exception/generation_prohibited.cc:
3479         Likewise.
3480         * testsuite/21_strings/basic_string/requirements/exception/propagation_consistent.cc:
3481         Likewise.
3482         * testsuite/21_strings/basic_string/requirements/explicit_instantiation/char/1.cc:
3483         Likewise.
3484         * testsuite/21_strings/basic_string/requirements/explicit_instantiation/char16_t/1.cc:
3485         Likewise.
3486         * testsuite/21_strings/basic_string/requirements/explicit_instantiation/char32_t/1.cc:
3487         Likewise.
3488         * testsuite/21_strings/basic_string/requirements/explicit_instantiation/char8_t/1.cc:
3489         Likewise.
3490         * testsuite/21_strings/basic_string/requirements/explicit_instantiation/wchar_t/1.cc:
3491         Likewise.
3492         * testsuite/21_strings/basic_string/requirements/typedefs.cc: Likewise.
3493
3494 2021-03-25  Jakub Jelinek  <jakub@redhat.com>
3495
3496         PR c++/99672
3497         * testsuite/18_support/source_location/consteval.cc (main): Adjust
3498         expected column numbers.
3499         * testsuite/18_support/source_location/1.cc (main): Likewise.
3500
3501 2021-03-25  Jonathan Wakely  <jwakely@redhat.com>
3502
3503         * libsupc++/new_opa.cc [!_GLIBCXX_HOSTED]: Declare malloc.
3504
3505 2021-03-25  Jonathan Wakely  <jwakely@redhat.com>
3506
3507         * testsuite/util/exception/safety.h (setup_base::generate):
3508         Support seeding random engine.
3509         (erase_point, erase_range): Adjust range of random numbers to
3510         ensure dereferenceable iterators are used where required.
3511         (generation_prohibited::run): Do not try to erase from empty
3512         containers.
3513         * testsuite/util/testsuite_containergen.h (test_containers):
3514         Support seeding random engine.
3515
3516 2021-03-23  Jonathan Wakely  <jwakely@redhat.com>
3517
3518         * testsuite/std/ranges/adaptors/reverse.cc: Replace duplicated
3519         line with a check that uses the const being/end overloads.
3520
3521 2021-03-23  Moritz Sichert  <sichert@in.tum.de>
3522
3523         * include/std/ranges (reverse_view::begin, reverse_view::end):
3524         Qualify make_reverse_iterator calls to avoid ADL.
3525         * testsuite/std/ranges/adaptors/reverse.cc: Test that
3526         views::reverse works when make_reverse_iterator is defined
3527         in an associated namespace.
3528
3529 2021-03-23  Jonathan Wakely  <jwakely@redhat.com>
3530
3531         * include/bits/c++config (_GLIBCXX_LONG_DOUBLE_ALT128_COMPAT):
3532         Do not define when compiling with Clang.
3533
3534 2021-03-22  Jonathan Wakely  <jwakely@redhat.com>
3535
3536         * include/std/string_view (basic_string_view(Range&&)): Define new
3537         constructor and deduction guide.
3538         * testsuite/21_strings/basic_string_view/cons/char/range_c++20.cc: New test.
3539         * testsuite/21_strings/basic_string_view/cons/wchar_t/range_c++20.cc: New test.
3540
3541 2021-03-22  Jonathan Wakely  <jwakely@redhat.com>
3542
3543         * include/bits/range_access.h (begin(T (&)[N]), end(T (&)[N])):
3544         Add missing 'noexcept' as per LWG 2280.
3545         (rbegin(T (&)[N]), rend(T (&)[N]), rbegin(initializer_list<T>))
3546         (rend(initializer_list<T>)): Add 'noexcept' as per LWG 3537.
3547         * testsuite/24_iterators/range_access/range_access.cc: Check for
3548         expected noexcept specifiers. Check result types of generic
3549         std::begin and std::end overloads.
3550         * testsuite/24_iterators/range_access/range_access_cpp14.cc:
3551         Check for expected noexcept specifiers.
3552         * testsuite/24_iterators/range_access/range_access_cpp17.cc:
3553         Likewise.
3554
3555 2021-03-19  Jonathan Wakely  <jwakely@redhat.com>
3556
3557         * include/std/type_traits (is_scoped_enum): Define.
3558         * include/std/version (__cpp_lib_is_scoped_enum): Define.
3559         * testsuite/20_util/is_scoped_enum/value.cc: New test.
3560         * testsuite/20_util/is_scoped_enum/version.cc: New test.
3561
3562 2021-03-16  Jonathan Wakely  <jwakely@redhat.com>
3563
3564         PR libstdc++/99341
3565         * config/abi/post/aarch64-linux-gnu/baseline_symbols.txt: Remove
3566         std::once_flag symbols.
3567         * config/abi/post/ia64-linux-gnu/baseline_symbols.txt: Likewise.
3568         * config/abi/post/m68k-linux-gnu/baseline_symbols.txt: Likewise.
3569         * config/abi/post/riscv64-linux-gnu/baseline_symbols.txt:
3570         Likewise.
3571         * config/abi/pre/gnu.ver: Likewise.
3572         * src/c++11/mutex.cc [_GLIBCXX_HAVE_LINUX_FUTEX]
3573         (struct __once_flag_compat): Remove.
3574         (_ZNSt9once_flag11_M_activateEv): Remove.
3575         (_ZNSt9once_flag9_M_finishEb): Remove.
3576
3577 2021-03-16  Jonathan Wakely  <jwakely@redhat.com>
3578
3579         PR libstdc++/99341
3580         * include/std/mutex [_GLIBCXX_HAVE_LINUX_FUTEX] (once_flag):
3581         Revert to pthread_once_t implementation.
3582         [_GLIBCXX_HAVE_LINUX_FUTEX] (call_once): Likewise.
3583         * src/c++11/mutex.cc [_GLIBCXX_HAVE_LINUX_FUTEX]
3584         (struct __once_flag_compat): New type matching the reverted
3585         implementation of once_flag using futexes.
3586         (once_flag::_M_activate): Remove, replace with ...
3587         (_ZNSt9once_flag11_M_activateEv): ... alias symbol.
3588         (once_flag::_M_finish): Remove, replace with ...
3589         (_ZNSt9once_flag9_M_finishEb): ... alias symbol.
3590         * testsuite/30_threads/call_once/66146.cc: Removed.
3591
3592 2021-03-15  Iain Sandoe  <iain@sandoe.co.uk>
3593
3594         * testsuite/17_intro/names.cc: Exclude j from the list
3595         of test symbols for Darwin.
3596
3597 2021-03-15  Iain Sandoe  <iain@sandoe.co.uk>
3598
3599         * config/os/bsd/darwin/ppc-extra.ver: Add matching for
3600         to_chars and from_chars for long double.
3601
3602 2021-03-15  Patrick Palka  <ppalka@redhat.com>
3603
3604         * include/bits/max_size_type.h (__max_size_type::operator _Tp):
3605         Fix formatting.
3606         (__max_size_type::operator++): Define.
3607         (__max_size_type::operator--): Likewise.
3608         (__max_size_type::operator<=>): Conditionally define (in place
3609         of the other comparison operators).
3610         (__max_diff_type::operator _Tp): Fix formatting.
3611         (__max_diff_type::operator++): Define.
3612         (__max_diff_type::operator--): Likewise.
3613         (__max_diff_type::operator<=>): Conditionally define (in place
3614         of the other comparison operators).
3615         * testsuite/std/ranges/iota/max_size_type.cc (test01): Test
3616         these operator overloads.
3617
3618 2021-03-15  Caroline Tice  <cmtice@google.com>
3619
3620         PR libstdc++/99172
3621         * src/Makefile.am (AM_CXXFLAGS_PRE, AM_CXXFLAGS): Add
3622         AM_CXXFLAGS_PRE with the old definition of AM_CXXFLAGS; make
3623         AM_CXXFLAGS to be AM_CXXFLAGS_PRE with '-fvtable-verify=std'
3624         filtered out.
3625         * src/Makefile.in: Regenerate.
3626
3627 2021-03-11  Patrick Palka  <ppalka@redhat.com>
3628
3629         * src/c++17/floating_to_chars.cc: Simplify the file as if
3630         __SIZEOF_INT128__ is always defined.
3631         [!defined __SIZEOF_INT128__]: Include "uint128_t.h".  Define
3632         a base-10 to_chars overload for the uint128_t class type.
3633         * src/c++17/uint128_t.h: New file.
3634         * testsuite/20_util/to_chars/long_double.cc: No longer expect an
3635         execution FAIL on targets that have a large long double type
3636         but lack __int128.
3637
3638 2021-03-11  Patrick Palka  <ppalka@redhat.com>
3639
3640         * src/c++17/ryu/LOCAL_PATCHES: Update.
3641         * src/c++17/ryu/d2s_intrinsics.h: Don't define uint128_t.
3642         * src/c++17/ryu/generic_128.h: Likewise.
3643         * src/c++17/ryu/ryu_generic_128.h (struct floating_decimal_128):
3644         Use uint128_t instead of __uint128_t.
3645         (generic_binary_to_decimal): Likewise.
3646
3647 2021-03-11  Patrick Palka  <ppalka@redhat.com>
3648
3649         * src/c++17/ryu/LOCAL_PATCHES: New file.
3650
3651 2021-03-11  Patrick Palka  <ppalka@redhat.com>
3652
3653         * src/c++17/floating_to_chars.cc (uint128_t): New conditionally
3654         defined alias of unsigned __int128.
3655         (floating_type_traits_binary128::mantissa_t): Use uint128_t
3656         instead of unsigned __int128.
3657         (floating_type_traits<long double>::mantissa_t)
3658         [LONG_DOUBLE_KIND == LDK_IBM128]: Likewise.
3659         (get_ieee_repr): Likewise.  Make casts from uint_t to mantissa_t
3660         and uint32_t explicit.  Simplify the extraction of mantissa,
3661         exponent and sign bit.
3662
3663 2021-03-11  Jonathan Wakely  <jwakely@redhat.com>
3664
3665         * include/std/barrier (barrier::arrival_token): New move-only
3666         class that encapsulates the underlying token value.
3667
3668 2021-03-11  Jonathan Wakely  <jwakely@redhat.com>
3669
3670         * python/libstdcxx/v6/printers.py (find_type): Use tag attribute
3671         instead of unqualified() method.
3672
3673 2021-03-11  Jonathan Wakely  <jwakely@redhat.com>
3674
3675         PR libstdc++/99537
3676         * include/std/stop_token (_Stop_state_t::_M_release_ownership):
3677         Use acq_rel memory ordering.
3678
3679 2021-03-11  Jonathan Wakely  <jwakely@redhat.com>
3680
3681         PR libstdc++/99533
3682         * src/c++17/fs_dir.cc (recursive_directory_iterator): Use new
3683         helper function to check for permission denied errors.
3684         * src/filesystem/dir.cc (recursive_directory_iterator):
3685         Likewise.
3686         * src/filesystem/dir-common.h (is_permission_denied_error): New
3687         helper function.
3688
3689 2021-03-11  Jonathan Wakely  <jwakely@redhat.com>
3690
3691         PR libstdc++/99536
3692         * include/bits/random.h (normal_distribution): Use
3693         default-initializer for _M_saved and _M_saved_available.
3694
3695 2021-03-10  John David Anglin  <danglin@gcc.gnu.org>
3696
3697         * testsuite/29_atomics/atomic/wait_notify/bool.cc: Add options to
3698         link with libatomic.
3699         * testsuite/29_atomics/atomic/wait_notify/generic.cc: Likewise.
3700         * testsuite/29_atomics/atomic/wait_notify/pointers.cc: Likewise.
3701         * testsuite/29_atomics/atomic_flag/wait_notify/1.cc: Likewise.
3702         * testsuite/30_threads/barrier/arrive.cc: Likewise.
3703         * testsuite/30_threads/barrier/arrive_and_drop.cc: Likewise.
3704         * testsuite/30_threads/barrier/arrive_and_wait.cc: Likewise.
3705         * testsuite/30_threads/barrier/completion.cc: Likewise.
3706         * testsuite/30_threads/latch/3.cc: Likewise.
3707         * testsuite/30_threads/semaphore/try_acquire.cc: Likewise.
3708         * testsuite/30_threads/semaphore/try_acquire_for.cc: Likewise.
3709         * testsuite/30_threads/semaphore/try_acquire_until.cc: Likewise.
3710
3711 2021-03-10  Jonathan Wakely  <jwakely@redhat.com>
3712
3713         PR libstdc++/99413
3714         * include/bits/align.h: Include debug/assertions.h.
3715         * include/bits/codecvt.h: Include bits/c++config.h.
3716         * include/bits/enable_special_members.h: Likewise.
3717         * include/bits/erase_if.h: Likewise.
3718         * include/bits/functional_hash.h: Include <type_traits>.
3719         * include/bits/invoke.h: Include bits/move.h.
3720         * include/bits/ostream_insert.h: Include bits/exception_defines.h.
3721         * include/bits/parse_numbers.h: Include <type_traits>.
3722         * include/bits/predefined_ops.h: Include bits/c++config.h.
3723         * include/bits/range_access.h: Include bits/stl_iterator.h.
3724         * include/bits/stl_bvector.h: Do not include bits/stl_vector.h.
3725         * include/bits/stl_iterator.h: Include bits/stl_iterator_base_types.h.
3726         * include/bits/stl_uninitialized.h: Include bits/stl_algobase.h.
3727         * include/bits/uniform_int_dist.h: Include bits/concept_check.h.
3728         * include/bits/unique_lock.h: Include bits/std_mutex.h.
3729         * include/debug/assertions.h: Include bits/c++config.h.
3730
3731 2021-03-10  Jonathan Wakely  <jwakely@redhat.com>
3732
3733         * include/bits/ranges_cmp.h (__eq_builtin_ptr_cmp): Remove.
3734         (ranges::equal_to, ranges::not_equal_to): Do not constrain
3735         with __eq_builtin_ptr_cmp.
3736         (ranges::less, ranges::greater, ranges::less_equal)
3737         (ranges::greater_equal): Do not constrain with
3738         __less_builtin_ptr_cmp.
3739         * libsupc++/compare (compare_three_way): Do not constrain with
3740         __3way_builtin_ptr_cmp.
3741         * testsuite/18_support/comparisons/object/builtin-ptr-three-way.cc: Moved to...
3742         * testsuite/18_support/comparisons/object/lwg3530.cc: ...here.
3743         * testsuite/20_util/function_objects/range.cmp/lwg3530.cc: New test.
3744
3745 2021-03-10  Jonathan Wakely  <jwakely@redhat.com>
3746
3747         * testsuite/std/time/syn_c++20.cc: Enable synopsis checks for
3748         C++20 calendar types.
3749
3750 2021-03-06  Jakub Jelinek  <jakub@redhat.com>
3751
3752         PR libstdc++/99396
3753         * include/std/bit (__rotl, __rotr): Add optimized variants for power of
3754         two _Nd which the compiler can pattern match the rotates.
3755
3756 2021-03-04  Jonathan Wakely  <jwakely@redhat.com>
3757
3758         PR libstdc++/99382
3759         * testsuite/20_util/specialized_algorithms/uninitialized_default_n/sizes.cc:
3760         Make storage larger than required. Verify no write to the last
3761         element.
3762         * testsuite/20_util/specialized_algorithms/uninitialized_value_construct_n/sizes.cc:
3763         Likewise.
3764
3765 2021-03-03  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
3766
3767         * config/abi/post/i386-solaris/baseline_symbols.txt: Regenerate.
3768         * config/abi/post/i386-solaris/amd64/baseline_symbols.txt:
3769         Likewise.
3770         * config/abi/post/sparc-solaris/baseline_symbols.txt: Likewise.
3771         * config/abi/post/sparc-solaris/sparcv9/baseline_symbols.txt:
3772         Likewise.
3773
3774 2021-03-03  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
3775
3776         * include/experimental/bits/simd.h: Replace reserved _X, _B by
3777         _Xp, _Bp.
3778         * include/experimental/bits/simd_builtin.h: Likewise.
3779         * include/experimental/bits/simd_x86.h: Likewise.
3780
3781 2021-02-27  Jonathan Wakely  <jwakely@redhat.com>
3782
3783         PR libstdc++/99301
3784         * include/std/chrono (year_month_day::_M_days_since_epoch()):
3785         Convert chrono::month and chrono::day to unsigned before
3786         converting to uint32_t.
3787
3788 2021-02-25  Jonathan Wakely  <jwakely@redhat.com>
3789
3790         * include/std/chrono (year_month_day::_S_from_days): Perform
3791         all calculations with type uint32_t.
3792
3793 2021-02-25  Jonathan Wakely  <jwakely@redhat.com>
3794
3795         * doc/xml/manual/abi.xml: Document versioning for GCC 11.
3796         * doc/html/manual/abi.html: Regenerate.
3797
3798 2021-02-25  Jonathan Wakely  <jwakely@redhat.com>
3799
3800         PR libstdc++/99270
3801         * testsuite/27_io/headers/cstdio/types_std.cc: Use pointer to
3802         FILE instead of FILE.
3803
3804 2021-02-25  Andreas Schwab  <schwab@suse.de>
3805
3806         * config/abi/post/aarch64-linux-gnu/baseline_symbols.txt: Update.
3807         * config/abi/post/ia64-linux-gnu/baseline_symbols.txt: Update.
3808         * config/abi/post/m68k-linux-gnu/baseline_symbols.txt: Update.
3809         * config/abi/post/riscv64-linux-gnu/baseline_symbols.txt: Update.
3810
3811 2021-02-25  Jonathan Wakely  <jwakely@redhat.com>
3812
3813         PR libstdc++/99265
3814         * include/std/chrono (year_month_day::_S_from_days): Cast long
3815         to int explicitly.
3816
3817 2021-02-25  Jonathan Wakely  <jwakely@redhat.com>
3818
3819         * include/std/utility (to_underlying): Define.
3820         * include/std/version (__cpp_lib_to_underlying): Define.
3821         * testsuite/20_util/to_underlying/1.cc: New test.
3822         * testsuite/20_util/to_underlying/version.cc: New test.
3823
3824 2021-02-24  Jonathan Wakely  <jwakely@redhat.com>
3825
3826         PR libstdc++/99261
3827         * src/c++17/floating_to_chars.cc (sprintf_ld): Add extra args
3828         before value to be printed.
3829
3830 2021-02-24  Patrick Palka  <ppalka@redhat.com>
3831
3832         * src/c++17/floating_to_chars.cc (__floating_to_chars_precision):
3833         Relax the condition that guards the printf code path to accept
3834         F128_type as well as long double.
3835
3836 2021-02-24  Cassio Neri  <cassio.neri@gmail.com>
3837
3838         * include/std/chrono (year_month_day_last:day): New
3839         implementation.
3840
3841 2021-02-24  Cassio Neri  <cassio.neri@gmail.com>
3842
3843         * include/std/chrono (year::is_leap): New implementation.
3844         * testsuite/std/time/year/2.cc: New test.
3845
3846 2021-02-24  Cassio Neri  <cassio.neri@gmail.com>
3847
3848         * include/std/chrono (year_month_day::_M_days_since_epoch):
3849         New implementation.
3850         * testsuite/std/time/year_month_day/4.cc: New test.
3851
3852 2021-02-24  Cassio Neri  <cassio.neri@gmail.com>
3853
3854         * include/std/chrono (year_month_day::_S_from_days): New
3855         implementation.
3856         * testsuite/std/time/year_month_day/3.cc: New test.
3857
3858 2021-02-24  Patrick Palka  <ppalka@redhat.com>
3859
3860         PR libstdc++/98384
3861         * testsuite/20_util/to_chars/long_double.cc: Include <optional>.
3862         (test01): Simplify verifying the nearby values by using a
3863         2-iteration loop and a dedicated output buffer to check that the
3864         nearby values are different.  Factor out the printf-based
3865         verification into a local function, and check that the leading
3866         hex digits agree before comparing to the output of printf.  Also
3867         verify the output by round-tripping it through from_chars.
3868
3869 2021-02-24  Jonathan Wakely  <jwakely@redhat.com>
3870
3871         PR libstdc++/98389
3872         * config/abi/pre/gnu.ver (GLIBCXX_3.4.29): Do not match to_chars
3873         symbols for long double arguments mangled as 'g'.
3874         * config/os/gnu-linux/ldbl-extra.ver: Likewise.
3875         * config/os/gnu-linux/ldbl-ieee128-extra.ver: Likewise.
3876         * src/c++17/Makefile.am [GLIBCXX_LDBL_ALT128_COMPAT_TRUE]:
3877         Use -mabi=ibmlongdouble for floating_to_chars.cc.
3878         * src/c++17/Makefile.in: Regenerate.
3879         * src/c++17/floating_to_chars.cc (floating_type_traits_binary128):
3880         New type defining type traits of IEEE binary128 format.
3881         (floating_type_traits<__float128>): Define specialization.
3882         (floating_type_traits<long double>): Define in terms of
3883         floating_type_traits_binary128 when appropriate.
3884         (floating_to_shortest_scientific): Handle __float128.
3885         (sprintf_ld): New function template for printing a long double
3886         or __ieee128 value using sprintf.
3887         (__floating_to_chars_shortest, __floating_to_chars_precision):
3888         Use sprintf_ld.
3889         (to_chars): Define overloads for __float128.
3890
3891 2021-02-24  Jonathan Wakely  <jwakely@redhat.com>
3892
3893         * testsuite/17_intro/names.cc: Undefine 'u' on powerpc*-linux*.
3894
3895 2021-02-23  Martin Sebor  <msebor@redhat.com>
3896
3897         PR c++/99074
3898         * libsupc++/dyncast.cc (__dynamic_cast): Return null when
3899         first argument is null.
3900
3901 2021-02-23  Jakub Jelinek  <jakub@redhat.com>
3902
3903         PR libstdc++/99181
3904         * testsuite/21_strings/char_traits/requirements/char/99181.cc: New
3905         test.
3906
3907 2021-02-23  Jakub Jelinek  <jakub@redhat.com>
3908
3909         PR libstdc++/99181
3910         * include/bits/char_traits.h (char_traits<char>::compare): For
3911         constexpr evaluation don't call
3912         __gnu_cxx::char_traits<char_type>::compare but do the comparison loop
3913         directly.
3914
3915 2021-02-23  Jakub Jelinek  <jakub@redhat.com>
3916
3917         PR libstdc++/97549
3918         * include/pstl/parallel_backend_serial.h: Remove __pstl::__par_backend.
3919
3920 2021-02-23  Patrick Palka  <ppalka@redhat.com>
3921
3922         PR libstdc++/98384
3923         * src/c++17/floating_to_chars.cc (get_ieee_repr): Extract
3924         the high- and low-order parts from an IBM long double value
3925         in an endian-agnostic way.
3926
3927 2021-02-19  Jonathan Wakely  <jwakely@redhat.com>
3928
3929         * include/bits/atomic_wait.h (__thread_relax()): Call
3930         __thread_yield() not __gthread_yield().
3931
3932 2021-02-15  Jonathan Wakely  <jwakely@redhat.com>
3933
3934         * include/bits/atomic_wait.h (__thread_yield()): Check
3935         _GLIBCXX_HAS_GTHREADS before using __gthread_yield.
3936         (__thread_relax()): Use __thread_yield() instead of repeating
3937         the preprocessor checks for __gthread_yield.
3938
3939 2021-02-15  Jonathan Wakely  <jwakely@redhat.com>
3940
3941         * include/std/mutex (once_flag::_M_activate()): Add explicit
3942         return statement for passive case.
3943         (once_flag::_M_finish(bool)): Use reserved name for parameter.
3944
3945 2021-02-14  Jonathan Wakely  <jwakely@redhat.com>
3946
3947         PR libstdc++/99096
3948         * testsuite/util/testsuite_fs.h: Always include <unistd.h>.
3949
3950 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
3951
3952         PR libstdc++/88881
3953         * src/c++17/fs_ops.cc (fs::symlink_status): Re-enable workaround.
3954
3955 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
3956
3957         * doc/xml/manual/status_cxx2014.xml: Document implementation
3958         specific properties of std::experimental::filesystem::rename.
3959         * doc/xml/manual/status_cxx2017.xml: Document implementation
3960         specific properties of std::filesystem::rename.
3961         * doc/html/*: Regenerate.
3962         * src/c++17/fs_ops.cc (fs::rename): Implement correct behaviour
3963         for directories on Windows.
3964         * src/filesystem/ops-common.h (__gnu_posix::rename): Use
3965         MoveFileExW on Windows.
3966         * testsuite/27_io/filesystem/operations/rename.cc: New test.
3967         * testsuite/experimental/filesystem/operations/rename.cc: New test.
3968
3969 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
3970
3971         * testsuite/util/testsuite_fs.h (nonexistent_path): Add
3972         random number to the path.
3973
3974 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
3975
3976         * include/experimental/internet (address_v6::to_string): Include
3977         scope ID in string.
3978         * testsuite/experimental/net/internet/address/v6/members.cc:
3979         Test to_string() results.
3980
3981 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
3982
3983         * include/experimental/internet (address_v6::any): Avoid using
3984         memcpy in constexpr function.
3985         (address_v6::loopback): Likewise.
3986         (make_address_v6): Fix missing return statements on error paths.
3987         * include/experimental/io_context: Avoid -Wdangling-else
3988         warning.
3989         * testsuite/experimental/net/internet/address/v4/members.cc:
3990         Remove unused variables.
3991         * testsuite/experimental/net/internet/address/v6/members.cc:
3992         New test.
3993
3994 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
3995
3996         * include/bits/shared_ptr_base.h (__shared_ptr::_M_get_deleter):
3997         Add unused attribute to parameter.
3998         * src/c++11/shared_ptr.cc (_Sp_make_shared_tag::_S_eq):
3999         Likewise.
4000
4001 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
4002
4003         * testsuite/27_io/basic_ostream/emit/1.cc: Expect test to fail
4004         if -fno-rtti is used.
4005         * testsuite/30_threads/async/forced_unwind.cc: Expect test
4006         to abort if -fno-rtti is used.
4007
4008 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
4009
4010         * testsuite/util/testsuite_allocator.h (memory_resource):
4011         Remove requirement for RTTI and exceptions to be enabled.
4012
4013 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
4014
4015         * testsuite/27_io/basic_istringstream/rdbuf/char/2832.cc: Use
4016         static_cast when RTTI is disabled.
4017         * testsuite/27_io/basic_istringstream/rdbuf/wchar_t/2832.cc:
4018         Likewise.
4019         * testsuite/27_io/basic_ostringstream/rdbuf/char/2832.cc:
4020         Likewise.
4021         * testsuite/27_io/basic_ostringstream/rdbuf/wchar_t/2832.cc:
4022         Likewise.
4023         * testsuite/27_io/basic_stringstream/str/char/2.cc:
4024         Likewise.
4025         * testsuite/27_io/basic_stringstream/str/wchar_t/2.cc:
4026         Likewise.
4027
4028 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
4029
4030         * include/std/ostream (__syncbuf_base::_S_get): Mark parameter
4031         as unused and only use dynamic_cast when RTTI is enabled.
4032
4033 2021-02-12  Jonathan Wakely  <jwakely@redhat.com>
4034
4035         PR libstdc++/99077
4036         * src/c++11/cxx11-ios_failure.cc (__ios_failure(const char*, int)):
4037         Change int parameter to error_code, to match std::ios_failure.
4038         (__throw_ios_failure(const char*, int)): Construct error_code
4039         from int parameter.
4040
4041 2021-02-11  Jonathan Wakely  <jwakely@redhat.com>
4042
4043         * libsupc++/eh_ptr.cc (_GLIBCXX_EH_PTR_RELOPS_COMPAT): Define
4044         new macro.
4045         * libsupc++/exception_ptr.h (_GLIBCXX_EH_PTR_USED): Check new
4046         macro instead of _GLIBCXX_EH_PTR_COMPAT.
4047         (operator==): Likewise.
4048
4049 2021-02-11  Jonathan Wakely  <jwakely@redhat.com>
4050
4051         PR libstdc++/99058
4052         * doc/xml/manual/status_cxx2011.xml: Document when support
4053         became stable.
4054         * doc/xml/manual/status_cxx2014.xml: Likewise.
4055         * doc/xml/manual/status_cxx2017.xml: Likewise.
4056         * doc/html/manual/status.html: Regenerate.
4057
4058 2021-02-10  Jonathan Wakely  <jwakely@redhat.com>
4059
4060         PR libstdc++/88881
4061         * src/c++17/fs_ops.cc (fs::status): Re-enable workaround.
4062
4063 2021-02-10  Jonathan Wakely  <jwakely@redhat.com>
4064
4065         * src/c++17/fs_ops.cc (fs::create_hard_link, fs::equivalent)
4066         (fs::remove): Use std::system_category() for error codes from
4067         GetLastError().
4068         * src/filesystem/ops.cc (fs::create_hard_link, fs::remove):
4069         Likewise.
4070
4071 2021-02-10  Jonathan Wakely  <jwakely@redhat.com>
4072
4073         * testsuite/27_io/filesystem/operations/proximate.cc: Fix typo
4074         in __MINGW32__ macro name.
4075         * testsuite/27_io/filesystem/path/compare/lwg2936.cc: Likewise.
4076         * testsuite/27_io/filesystem/path/generation/proximate.cc:
4077         Likewise.
4078         * testsuite/27_io/filesystem/path/generation/relative.cc:
4079         Likewise.
4080         * testsuite/util/testsuite_fs.h: Likewise.
4081
4082 2021-02-09  François Dumont  <fdumont@gcc.gnu.org>
4083
4084         * include/bits/stl_tree.h
4085         (__has_is_transparent, __has_is_transparent_t): Move...
4086         * include/bits/stl_function.h: ...here.
4087         * include/bits/hashtable_policy.h (_Hash_code_base<>::_M_hash_code_tr): New..
4088         (_Hashtable_base<>::_M_equals_tr): New.
4089         * include/bits/hashtable.h (_Hashtable<>::_M_find_tr, _Hashtable<>::_M_count_tr,
4090         _Hashtable<>::_M_equal_range_tr): New member function templates to perform
4091         heterogeneous lookup.
4092         (_Hashtable<>::_M_find_before_node_tr): New.
4093         (_Hashtable<>::_M_find_node_tr): New.
4094         * include/bits/unordered_map.h (unordered_map::find<>, unordered_map::count<>,
4095         unordered_map::contains<>, unordered_map::equal_range<>): New member function
4096         templates to perform heterogeneous lookup.
4097         (unordered_multimap::find<>, unordered_multimap::count<>,
4098         unordered_multimap::contains<>, unordered_multimap::equal_range<>): Likewise.
4099         * include/bits/unordered_set.h  (unordered_set::find<>, unordered_set::count<>,
4100         unordered_set::contains<>, unordered_set::equal_range<>): Likewise.
4101         (unordered_multiset::find<>, unordered_multiset::count<>,
4102         unordered_multiset::contains<>, unordered_multiset::equal_range<>): Likewise.
4103         * include/debug/unordered_map
4104         (unordered_map::find<>, unordered_map::equal_range<>): Likewise.
4105         (unordered_multimap::find<>, unordered_multimap::equal_range<>): Likewise.
4106         * include/debug/unordered_set
4107         (unordered_set::find<>, unordered_set::equal_range<>): Likewise.
4108         (unordered_multiset::find<>, unordered_multiset::equal_range<>): Likewise.
4109         * testsuite/23_containers/unordered_map/operations/1.cc: New test.
4110         * testsuite/23_containers/unordered_multimap/operations/1.cc: New test.
4111         * testsuite/23_containers/unordered_multiset/operations/1.cc: New test.
4112         * testsuite/23_containers/unordered_set/operations/1.cc: New test.
4113
4114 2021-02-09  François Dumont  <fdumont@gcc.gnu.org>
4115
4116         * include/bits/stl_deque.h
4117         (std::operator-(deque::iterator, deque::iterator)): Replace if/then with
4118         a null pointer test.
4119
4120 2021-02-09  Jonathan Wakely  <jwakely@redhat.com>
4121
4122         * testsuite/27_io/filesystem/operations/remove_all.cc: Remove
4123         test directory after making it writable again.
4124         * testsuite/experimental/filesystem/operations/remove_all.cc:
4125         Likewise.
4126
4127 2021-02-09  Jonathan Wakely  <jwakely@redhat.com>
4128
4129         PR libstdc++/99021
4130         * include/std/coroutine (coroutine_handle<P>::from_address): Add
4131         noexcept.
4132
4133 2021-02-09  Vladimir Vishnevsky  <vv.os.swe@gmail.com>
4134
4135         * include/ext/stdio_sync_filebuf.h: Remove unused <unistd.h>.
4136         * src/c++17/fs_ops.cc (fs::permissions): Qualify mode_t.
4137
4138 2021-02-09  Jakub Jelinek  <jakub@redhat.com>
4139
4140         PR middle-end/98465
4141         * include/bits/basic_string.tcc (basic_string::_M_replace): When __s
4142         points to the characters moved by earlier _S_move, compute the source
4143         address using expression based on the __p pointer rather than __s
4144         pointer.
4145
4146 2021-02-03  Jonathan Wakely  <jwakely@redhat.com>
4147
4148         * testsuite/19_diagnostics/error_code/operators/not_equal.cc:
4149         Add comparison with same category and different values.
4150         * testsuite/19_diagnostics/error_code/operators/less.cc:
4151         Likewise. Fix comparison involving different categories.
4152         * testsuite/19_diagnostics/error_code/operators/three_way.cc:
4153         Likewise.
4154         * testsuite/19_diagnostics/error_condition/operators/less.cc:
4155         Add comment.
4156         * testsuite/19_diagnostics/error_condition/operators/three_way.cc:
4157         Likewise.
4158
4159 2021-02-03  yaozhongxiao  <yaozhongxiao@linux.alibaba.com>
4160
4161         * include/experimental/bits/simd_neon.h: Replace repeated vpadd
4162         calls with a single vaddv for aarch64.
4163
4164 2021-02-03  Matthias Kretz  <kretz@kde.org>
4165
4166         * testsuite/Makefile.am: Warn about the workaround. Add
4167         -fno-tree-vrp to CXXFLAGS passed to the check_simd script.
4168         Improve initial user feedback from make check-simd.
4169         * testsuite/Makefile.in: Regenerated.
4170
4171 2021-02-03  Matthias Kretz  <kretz@kde.org>
4172
4173         * include/experimental/bits/simd.h: Add __detail::_Minimum and
4174         __detail::_Maximum to use them as _BinaryOperation to _S_reduce.
4175         Add hmin and hmax overloads for simd and const_where_expression.
4176         * include/experimental/bits/simd_scalar.h
4177         (_SimdImplScalar::_S_reduce): Make unused _BinaryOperation
4178         parameter const-ref to allow calling _S_reduce with an rvalue.
4179         * testsuite/experimental/simd/tests/reductions.cc: Add tests for
4180         hmin and hmax. Since the compiler statically determined that all
4181         tests pass, repeat the test after a call to make_value_unknown.
4182
4183 2021-02-03  Matthias Kretz  <kretz@kde.org>
4184
4185         * testsuite/experimental/simd/tests/bits/verify.h (verify): Add
4186         instruction pointer data member. Ensure that the `if (m_failed)`
4187         branch is always inlined into the calling code. The body of the
4188         conditional can still be a function call. Move the get_ip call
4189         into the verify ctor to simplify the ctor calls.
4190         (COMPARE): Don't mention the use of all_of for reduction of a
4191         simd_mask. It only distracts from the real issue.
4192
4193 2021-02-03  Matthias Kretz  <kretz@kde.org>
4194
4195         * testsuite/experimental/simd/driver.sh: Abstract reading test
4196         options into read_src_option function. Read skip, only,
4197         expensive, and xfail via read_src_option. Add timeout and
4198         timeout-factor options and adjust timeout variable accordingly.
4199         * testsuite/experimental/simd/tests/loadstore.cc: Set
4200         timeout-factor 2.
4201
4202 2021-02-03  Matthias Kretz  <kretz@kde.org>
4203
4204         * testsuite/experimental/simd/driver.sh: When handling the pipe
4205         to log (and on verbose to stdout) count the lines. If it exceeds
4206         1000 log the issue and exit 125, which is then handled as a
4207         failure.
4208
4209 2021-02-03  Matthias Kretz  <kretz@kde.org>
4210
4211         * testsuite/experimental/simd/tests/hypot3_fma.cc: Add skip:
4212         markup for long double on powerpc64*.
4213
4214 2021-02-03  Matthias Kretz  <kretz@kde.org>
4215
4216         * include/experimental/bits/simd.h: Add __have_power10vec
4217         conditional on _ARCH_PWR10.
4218         * include/experimental/bits/simd_builtin.h: Forward declare
4219         _MaskImplPpc and use it as _MaskImpl when __ALTIVEC__ is
4220         defined.
4221         (_MaskImplBuiltin::_S_some_of): Call _S_popcount from the
4222         _SuperImpl for optimizations and correctness.
4223         * include/experimental/bits/simd_ppc.h: Add _MaskImplPpc.
4224         (_MaskImplPpc::_S_popcount): Implement via vec_cntm for POWER10.
4225         Otherwise, for >=int use -vec_sums divided by a sizeof factor.
4226         For <int use -vec_sums(vec_sum4s(...)) to sum all mask entries.
4227
4228 2021-02-03  Matthias Kretz  <kretz@kde.org>
4229
4230         * testsuite/experimental/simd/driver.sh: Remove executable on
4231         SIGINT. Process compiler and test executable output: In verbose
4232         mode print messages immediately, limited to 1000 lines and
4233         breaking long lines to below $COLUMNS (or 1024 if not set).
4234         Communicating the exit status of the compiler / test with the
4235         necessary pipe is done via a message through stdout/-in.
4236
4237 2021-02-03  Matthias Kretz  <kretz@kde.org>
4238
4239         * testsuite/Makefile.am: Ensure .simd.summary is empty before
4240         collecting a new summary.
4241         * testsuite/Makefile.in: Regenerate.
4242
4243 2021-02-03  Matthias Kretz  <kretz@kde.org>
4244
4245         * testsuite/experimental/simd/generate_makefile.sh: Use
4246         different variables internally than documented for user
4247         overrides. This makes internal append/prepend work as intended.
4248
4249 2021-02-03  Matthias Kretz  <kretz@kde.org>
4250
4251         * testsuite/experimental/simd/driver.sh (verify_test): Print
4252         test output on run xfail. Do not repeat lines from the log that
4253         were already printed on stdout.
4254         (test_selector): Make the compiler flags pattern usable as a
4255         substring selector.
4256         (toplevel): Trap on SIGINT and remove the log and sum files.
4257         Call timout with --foreground to quickly terminate on SIGINT.
4258         * testsuite/experimental/simd/generate_makefile.sh: Simplify run
4259         targets via target patterns. Default DRIVEROPTS to -v for run
4260         targets. Remove log and sum files after completion of the run
4261         target (so that it's always recompiled).
4262         Place help text into text file for reasonable 'make help'
4263         performance.
4264
4265 2021-02-03  Matthias Kretz  <kretz@kde.org>
4266
4267         * include/experimental/bits/simd.h: Remove unnecessary static
4268         assertion. Allow sizeof(8) integer __intrinsic_type to enable
4269         the necessary mask type.
4270
4271 2021-02-03  Matthias Kretz  <kretz@kde.org>
4272
4273         * include/experimental/bits/simd.h: Let __intrinsic_type<long
4274         double, N> be valid if sizeof(long double) == sizeof(double) and
4275         use a __vector double as member type.
4276
4277 2021-02-03  Matthias Kretz  <kretz@kde.org>
4278
4279         * include/experimental/bits/simd.h (__is_intrinsic_type): New
4280         internal type trait. Alias for __is_vector_type on x86.
4281         (_VectorTraitsImpl): Enable for __intrinsic_type in addition for
4282         __vector_type.
4283         (__intrin_bitcast): Allow casting to & from vector & intrinsic
4284         types.
4285         (__intrinsic_type): Explicitly specialize for NEON intrinsic
4286         vector types.
4287
4288 2021-02-03  Matthias Kretz  <kretz@kde.org>
4289
4290         * testsuite/experimental/simd/driver.sh: Implement skip, only,
4291         expensive, and xfail markers. They can select on type, ABI tag
4292         subset number, target-triplet, and compiler flags.
4293         * testsuite/experimental/simd/generate_makefile.sh: The summary
4294         now includes lines for unexpected passes and expected failures.
4295         If the skip or only markers are only conditional on the type, do
4296         not generate rules for those types.
4297         * testsuite/experimental/simd/tests/abs.cc: Mark test expensive
4298         for ABI tag subsets 1-9.
4299         * testsuite/experimental/simd/tests/algorithms.cc: Ditto.
4300         * testsuite/experimental/simd/tests/broadcast.cc: Ditto.
4301         * testsuite/experimental/simd/tests/casts.cc: Ditto.
4302         * testsuite/experimental/simd/tests/generator.cc: Ditto.
4303         * testsuite/experimental/simd/tests/integer_operators.cc: Ditto.
4304         * testsuite/experimental/simd/tests/loadstore.cc: Ditto.
4305         * testsuite/experimental/simd/tests/mask_broadcast.cc: Ditto.
4306         * testsuite/experimental/simd/tests/mask_conversions.cc: Ditto.
4307         * testsuite/experimental/simd/tests/mask_implicit_cvt.cc: Ditto.
4308         * testsuite/experimental/simd/tests/mask_loadstore.cc: Ditto.
4309         * testsuite/experimental/simd/tests/mask_operator_cvt.cc: Ditto.
4310         * testsuite/experimental/simd/tests/mask_operators.cc: Ditto.
4311         * testsuite/experimental/simd/tests/mask_reductions.cc: Ditto.
4312         * testsuite/experimental/simd/tests/operator_cvt.cc: Ditto.
4313         * testsuite/experimental/simd/tests/operators.cc: Ditto.
4314         * testsuite/experimental/simd/tests/reductions.cc: Ditto.
4315         * testsuite/experimental/simd/tests/simd.cc: Ditto.
4316         * testsuite/experimental/simd/tests/split_concat.cc: Ditto.
4317         * testsuite/experimental/simd/tests/splits.cc: Ditto.
4318         * testsuite/experimental/simd/tests/where.cc: Ditto.
4319         * testsuite/experimental/simd/tests/fpclassify.cc: Ditto. In
4320         addition replace "test only floattypes" marker by unconditional
4321         "float|double|ldouble" only marker.
4322         * testsuite/experimental/simd/tests/frexp.cc: Ditto.
4323         * testsuite/experimental/simd/tests/hypot3_fma.cc: Ditto.
4324         * testsuite/experimental/simd/tests/ldexp_scalbn_scalbln_modf.cc:
4325         Ditto.
4326         * testsuite/experimental/simd/tests/logarithm.cc: Ditto.
4327         * testsuite/experimental/simd/tests/math_1arg.cc: Ditto.
4328         * testsuite/experimental/simd/tests/math_2arg.cc: Ditto.
4329         * testsuite/experimental/simd/tests/remqo.cc: Ditto.
4330         * testsuite/experimental/simd/tests/trigonometric.cc: Ditto.
4331         * testsuite/experimental/simd/tests/trunc_ceil_floor.cc: Ditto.
4332         * testsuite/experimental/simd/tests/sincos.cc: Ditto. In
4333         addition, xfail on run because the reference data is missing.
4334
4335 2021-02-02  Jonathan Wakely  <jwakely@redhat.com>
4336
4337         * doc/xml/manual/status_cxx2011.xml: Remove stray table cell.
4338         * doc/xml/manual/status_cxx2014.xml: Likewise.
4339         * doc/xml/manual/status_cxx2017.xml: Likewise.
4340         * doc/html/manual/status.html: Regenerate.
4341
4342 2021-02-01  François Dumont  <fdumont@gcc.gnu.org>
4343
4344         PR libstdc++/70303
4345         * include/bits/stl_deque.h (std::deque<>::operator-(iterator, iterator)):
4346         Return 0 if both iterators are value-initialized.
4347         * testsuite/23_containers/deque/70303.cc: New test.
4348         * testsuite/23_containers/vector/70303.cc: New test.
4349
4350 2021-02-01  Jonathan Wakely  <jwakely@redhat.com>
4351
4352         * doc/xml/manual/status_cxx2011.xml: Update std::call_once
4353         status.
4354         * doc/xml/manual/status_cxx2014.xml: Likewise.
4355         * doc/xml/manual/status_cxx2017.xml: Likewise. Update
4356         std::from_chars and std::to_chars status. Fix formatting.
4357         * doc/html/manual/status.html: Regenerate.
4358
4359 2021-01-28  Jonathan Wakely  <jwakely@redhat.com>
4360
4361         * include/experimental/bits/numeric_traits.h: Update copyright
4362         dates.
4363         * include/experimental/bits/simd.h: Likewise.
4364         * include/experimental/bits/simd_builtin.h: Likewise.
4365         * include/experimental/bits/simd_converter.h: Likewise.
4366         * include/experimental/bits/simd_detail.h: Likewise.
4367         * include/experimental/bits/simd_fixed_size.h: Likewise.
4368         * include/experimental/bits/simd_math.h: Likewise.
4369         * include/experimental/bits/simd_neon.h: Likewise.
4370         * include/experimental/bits/simd_ppc.h: Likewise.
4371         * include/experimental/bits/simd_scalar.h: Likewise.
4372         * include/experimental/bits/simd_x86.h: Likewise.
4373         * include/experimental/bits/simd_x86_conversions.h: Likewise.
4374         * include/experimental/simd: Likewise.
4375         * testsuite/experimental/simd/*: Likewise.
4376
4377 2021-01-27  Jonathan Wakely  <jwakely@redhat.com>
4378
4379         * doc/xml/manual/status_cxx2017.xml: Replace invalid entity.
4380         * doc/html/*: Regenerate.
4381
4382 2021-01-27  Jonathan Wakely  <jwakely@redhat.com>
4383
4384         * testsuite/experimental/simd/generate_makefile.sh: Use printf
4385         instead of echo when printing escape characters.
4386
4387 2021-01-27  Matthias Kretz  <kretz@kde.org>
4388
4389         * scripts/check_simd: New file. This script is called from the
4390         the check-simd target. It determines a set of compiler flags and
4391         simulator setups for calling generate_makefile.sh and passes the
4392         information back to the check-simd target, which recurses to the
4393         generated Makefiles.
4394         * scripts/create_testsuite_files: Remove files below simd/tests/
4395         from testsuite_files and place them in testsuite_files_simd.
4396         * testsuite/Makefile.am: Add testsuite_files_simd. Add
4397         check-simd target.
4398         * testsuite/Makefile.in: Regenerate.
4399         * testsuite/experimental/simd/driver.sh: New file. This script
4400         compiles and runs a given simd test, logging its output and
4401         status. It uses the timeout command to implement compile and
4402         test timeouts.
4403         * testsuite/experimental/simd/generate_makefile.sh: New file.
4404         This script generates a Makefile which uses driver.sh to compile
4405         and run the tests and collect the logs into a single log file.
4406         * testsuite/experimental/simd/tests/abs.cc: New file. Tests
4407         abs(simd).
4408         * testsuite/experimental/simd/tests/algorithms.cc: New file.
4409         Tests min/max(simd, simd).
4410         * testsuite/experimental/simd/tests/bits/conversions.h: New
4411         file. Contains functions to support tests involving conversions.
4412         * testsuite/experimental/simd/tests/bits/make_vec.h: New file.
4413         Support functions make_mask and make_vec.
4414         * testsuite/experimental/simd/tests/bits/mathreference.h: New
4415         file. Support functions to supply precomputed math function
4416         reference data.
4417         * testsuite/experimental/simd/tests/bits/metahelpers.h: New
4418         file. Support code for SFINAE testing.
4419         * testsuite/experimental/simd/tests/bits/simd_view.h: New file.
4420         * testsuite/experimental/simd/tests/bits/test_values.h: New
4421         file. Test functions to easily drive a test with simd objects
4422         initialized from a given list of values and a range of random
4423         values.
4424         * testsuite/experimental/simd/tests/bits/ulp.h: New file.
4425         Support code to determine the ULP distance of simd objects.
4426         * testsuite/experimental/simd/tests/bits/verify.h: New file.
4427         Test framework for COMPARE'ing simd objects and instantiating
4428         the test templates with value_type and ABI tag.
4429         * testsuite/experimental/simd/tests/broadcast.cc: New file. Test
4430         simd broadcasts.
4431         * testsuite/experimental/simd/tests/casts.cc: New file. Test
4432         simd casts.
4433         * testsuite/experimental/simd/tests/fpclassify.cc: New file.
4434         Test floating-point classification functions.
4435         * testsuite/experimental/simd/tests/frexp.cc: New file. Test
4436         frexp(simd).
4437         * testsuite/experimental/simd/tests/generator.cc: New file. Test
4438         simd generator constructor.
4439         * testsuite/experimental/simd/tests/hypot3_fma.cc: New file.
4440         Test 3-arg hypot(simd,simd,simd) and fma(simd,simd,sim).
4441         * testsuite/experimental/simd/tests/integer_operators.cc: New
4442         file. Test integer operators.
4443         * testsuite/experimental/simd/tests/ldexp_scalbn_scalbln_modf.cc:
4444         New file. Test ldexp(simd), scalbn(simd), scalbln(simd), and
4445         modf(simd).
4446         * testsuite/experimental/simd/tests/loadstore.cc: New file. Test
4447         (converting) simd loads and stores.
4448         * testsuite/experimental/simd/tests/logarithm.cc: New file. Test
4449         log*(simd).
4450         * testsuite/experimental/simd/tests/mask_broadcast.cc: New file.
4451         Test simd_mask broadcasts.
4452         * testsuite/experimental/simd/tests/mask_conversions.cc: New
4453         file. Test simd_mask conversions.
4454         * testsuite/experimental/simd/tests/mask_implicit_cvt.cc: New
4455         file. Test simd_mask implicit conversions.
4456         * testsuite/experimental/simd/tests/mask_loadstore.cc: New file.
4457         Test simd_mask loads and stores.
4458         * testsuite/experimental/simd/tests/mask_operator_cvt.cc: New
4459         file. Test simd_mask operators convert as specified.
4460         * testsuite/experimental/simd/tests/mask_operators.cc: New file.
4461         Test simd_mask compares, subscripts, and negation.
4462         * testsuite/experimental/simd/tests/mask_reductions.cc: New
4463         file. Test simd_mask reductions.
4464         * testsuite/experimental/simd/tests/math_1arg.cc: New file. Test
4465         1-arg math functions on simd.
4466         * testsuite/experimental/simd/tests/math_2arg.cc: New file. Test
4467         2-arg math functions on simd.
4468         * testsuite/experimental/simd/tests/operator_cvt.cc: New file.
4469         Test implicit conversions on simd binary operators behave as
4470         specified.
4471         * testsuite/experimental/simd/tests/operators.cc: New file. Test
4472         simd compares, subscripts, not, unary minus, plus, minus,
4473         multiplies, divides, increment, and decrement.
4474         * testsuite/experimental/simd/tests/reductions.cc: New file.
4475         Test reduce(simd).
4476         * testsuite/experimental/simd/tests/remqo.cc: New file. Test
4477         remqo(simd).
4478         * testsuite/experimental/simd/tests/simd.cc: New file. Basic
4479         sanity checks of simd types.
4480         * testsuite/experimental/simd/tests/sincos.cc: New file. Test
4481         sin(simd) and cos(simd).
4482         * testsuite/experimental/simd/tests/split_concat.cc: New file.
4483         Test split(simd) and concat(simd, simd).
4484         * testsuite/experimental/simd/tests/splits.cc: New file. Test
4485         split(simd_mask).
4486         * testsuite/experimental/simd/tests/trigonometric.cc: New file.
4487         Test remaining trigonometric functions on simd.
4488         * testsuite/experimental/simd/tests/trunc_ceil_floor.cc: New
4489         file. Test trunc(simd), ceil(simd), and floor(simd).
4490         * testsuite/experimental/simd/tests/where.cc: New file. Test
4491         masked operations using where.
4492
4493 2021-01-27  Matthias Kretz  <kretz@kde.org>
4494
4495         * doc/xml/manual/status_cxx2017.xml: Add implementation status
4496         of the Parallelism TS 2. Document implementation-defined types
4497         and behavior.
4498         * include/Makefile.am: Add new headers.
4499         * include/Makefile.in: Regenerate.
4500         * include/experimental/simd: New file. New header for
4501         Parallelism TS 2.
4502         * include/experimental/bits/numeric_traits.h: New file.
4503         Implementation of P1841R1 using internal naming. Addition of
4504         missing IEC559 functionality query.
4505         * include/experimental/bits/simd.h: New file. Definition of the
4506         public simd interfaces and general implementation helpers.
4507         * include/experimental/bits/simd_builtin.h: New file.
4508         Implementation of the _VecBuiltin simd_abi.
4509         * include/experimental/bits/simd_converter.h: New file. Generic
4510         simd conversions.
4511         * include/experimental/bits/simd_detail.h: New file. Internal
4512         macros for the simd implementation.
4513         * include/experimental/bits/simd_fixed_size.h: New file. Simd
4514         fixed_size ABI specific implementations.
4515         * include/experimental/bits/simd_math.h: New file. Math
4516         overloads for simd.
4517         * include/experimental/bits/simd_neon.h: New file. Simd NEON
4518         specific implementations.
4519         * include/experimental/bits/simd_ppc.h: New file. Implement bit
4520         shifts to avoid invalid results for integral types smaller than
4521         int.
4522         * include/experimental/bits/simd_scalar.h: New file. Simd scalar
4523         ABI specific implementations.
4524         * include/experimental/bits/simd_x86.h: New file. Simd x86
4525         specific implementations.
4526         * include/experimental/bits/simd_x86_conversions.h: New file.
4527         x86 specific conversion optimizations. The conversion patterns
4528         work around missing conversion patterns in the compiler and
4529         should be removed as soon as PR85048 is resolved.
4530         * testsuite/experimental/simd/standard_abi_usable.cc: New file.
4531         Test that all (not all fixed_size<N>, though) standard simd and
4532         simd_mask types are usable.
4533         * testsuite/experimental/simd/standard_abi_usable_2.cc: New
4534         file. As above but with -ffast-math.
4535         * testsuite/libstdc++-dg/conformance.exp: Don't build simd tests
4536         from the standard test loop. Instead use
4537         check_vect_support_and_set_flags to build simd tests with the
4538         relevant machine flags.
4539
4540 2021-01-27  Jonathan Wakely  <jwakely@redhat.com>
4541
4542         PR libstdc++/66414
4543         * include/bits/string_view.tcc
4544         (basic_string_view::find(const CharT*, size_type, size_type)):
4545         Optimize.
4546
4547 2021-01-27  Paul Fee  <paul.f.fee@gmail.com>
4548
4549         * include/bits/basic_string.h (basic_string::contains): New
4550         member functions.
4551         * include/std/string_view (basic_string_view::contains):
4552         Likewise.
4553         * include/std/version (__cpp_lib_string_contains): Define.
4554         * testsuite/21_strings/basic_string/operations/starts_with/char/1.cc:
4555         Remove trailing whitespace.
4556         * testsuite/21_strings/basic_string/operations/starts_with/wchar_t/1.cc:
4557         Likewise.
4558         * testsuite/21_strings/basic_string/operations/contains/char/1.cc: New test.
4559         * testsuite/21_strings/basic_string/operations/contains/wchar_t/1.cc: New test.
4560         * testsuite/21_strings/basic_string_view/operations/contains/char/1.cc: New test.
4561         * testsuite/21_strings/basic_string_view/operations/contains/char/2.cc: New test.
4562         * testsuite/21_strings/basic_string_view/operations/contains/wchar_t/1.cc: New test.
4563
4564 2021-01-21  Jonathan Wakely  <jwakely@redhat.com>
4565
4566         * src/c++17/Makefile.in: Regenerate.
4567
4568 2021-01-20  David Edelsohn  <dje.gcc@gmail.com>
4569
4570         * config/os/aix/ctype_inline.h (bool ctype<char>:: is): Cast
4571         _OBJ_DATA subscript to unsigned char. Add _THREAD_SAFE access to
4572         __lc_type.
4573         (const char* ctype<char>:: is): Same.
4574
4575 2021-01-18  Jonathan Wakely  <jwakely@redhat.com>
4576
4577         PR libstdc++/98725
4578         * testsuite/20_util/unique_ptr/io/lwg2948.cc:  Do not try to
4579         write to a wide character stream if wide character support is
4580         disabled in the library.
4581
4582 2021-01-18  Jonathan Wakely  <jwakely@redhat.com>
4583
4584         * testsuite/27_io/basic_stringstream/cons/char/1.cc: Use
4585         stringbuf not wstringbuf.
4586
4587 2021-01-18  Jakub Jelinek  <jakub@redhat.com>
4588
4589         PR debug/98708
4590         * src/c++11/Makefile.am (cxx11-ios_failure-lt.s, cxx11-ios_failure.s):
4591         Compile with -gno-as-loc-support.
4592         * src/c++11/Makefile.in: Regenerated.
4593
4594 2021-01-16  H.J. Lu  <hjl.tools@gmail.com>
4595
4596         * testsuite/29_atomics/atomic_flag/test_and_set/explicit-hle.cc:
4597         Add -fcf-protection=none to -march=i486.
4598
4599 2021-01-14  François Dumont  <fdumont@gcc.gnu.org>
4600
4601         * testsuite/23_containers/deque/debug/98466.cc: Make it pre-C++11
4602         compliant.
4603
4604 2021-01-14  Alexandre Oliva  <oliva@adacore.com>
4605
4606         * testsuite/30_threads/future/members/poll.cc: Calibrate
4607         iteration count.
4608
4609 2021-01-14  François Dumont  <fdumont@gcc.gnu.org>
4610
4611         PR libstdc++/98466
4612         * include/bits/hashtable_policy.h (_Node_iterator_base()): Set _M_cur to nullptr.
4613         (_Node_iterator()): Make default.
4614         (_Node_const_iterator()): Make default.
4615         * include/debug/macros.h (__glibcxx_check_erae_range_after): Add _M_singular
4616         iterator checks.
4617         * include/debug/safe_iterator.h
4618         (_GLIBCXX_DEBUG_VERIFY_OPERANDS): Accept if both iterator are value initialized.
4619         * include/debug/safe_local_iterator.h (_GLIBCXX_DEBUG_VERIFY_OPERANDS):
4620         Likewise.
4621         * include/debug/safe_iterator.tcc (_Safe_iterator<>::_M_valid_range): Add
4622         _M_singular checks on input iterators.
4623         * src/c++11/debug.cc (_Safe_iterator_base::_M_can_compare): Remove _M_singular
4624         checks.
4625         * testsuite/23_containers/deque/debug/98466.cc: New test.
4626         * testsuite/23_containers/unordered_map/debug/98466.cc: New test.
4627
4628 2021-01-14  Jonathan Wakely  <jwakely@redhat.com>
4629
4630         PR libstdc++/98471
4631         * include/bits/fs_path.h (__throw_conversion_error): New
4632         function to throw or abort on character conversion errors.
4633         (__wstr_from_utf8): Move definition after filesystem_error has
4634         been defined. Use __throw_conversion_error.
4635         (path::_S_convert<_EcharT>): Use __throw_conversion_error.
4636         (path::_S_str_convert<_CharT, _Traits, _Allocator>): Likewise.
4637         (path::u8string): Likewise.
4638
4639 2021-01-14  Jonathan Wakely  <jwakely@redhat.com>
4640
4641         * include/std/barrier: Update copyright years. Fix whitespace.
4642         * include/std/version: Fix whitespace.
4643         * testsuite/30_threads/barrier/1.cc: Update copyright years.
4644         * testsuite/30_threads/barrier/2.cc: Likewise.
4645         * testsuite/30_threads/barrier/arrive.cc: Likewise.
4646         * testsuite/30_threads/barrier/arrive_and_drop.cc: Likewise.
4647         * testsuite/30_threads/barrier/arrive_and_wait.cc: Likewise.
4648         * testsuite/30_threads/barrier/completion.cc: Likewise.
4649
4650 2021-01-13  Jonathan Wakely  <jwakely@redhat.com>
4651
4652         * doc/doxygen/user.cfg.in (INPUT): Remove include/debug/array.
4653
4654 2021-01-10  David Edelsohn  <dje.gcc@gmail.com>
4655
4656         PR libstdc++/98613
4657         * testsuite/ext/vstring/cons/moveable.cc: Suppress false positive
4658         warning.
4659         * testsuite/ext/vstring/modifiers/assign/move_assign.cc: Same.
4660
4661 2021-01-08  Olivier Hainque  <hainque@adacore.com>
4662
4663         * testsuite/20_util/bind/ref_neg.cc: Tweak the
4664         dg-prune-output regex for out-of-build-tree contexts.
4665
4666 2021-01-07  Thomas Rodgers  <trodgers@redhat.com>
4667
4668         * doc/doxygen/user.cfg.in: Add new header.
4669         * include/Makefile.am (std_headers): likewise.
4670         * include/Makefile.in: Regenerate.
4671         * include/precompiled/stdc++.h: Add new header.
4672         * include/std/barrier: New file.
4673         * include/std/version: Add __cpp_lib_barrier feature test macro.
4674         * testsuite/30_threads/barrier/1.cc: New test.
4675         * testsuite/30_threads/barrier/2.cc: Likewise.
4676         * testsuite/30_threads/barrier/arrive_and_drop.cc: Likewise.
4677         * testsuite/30_threads/barrier/arrive_and_wait.cc: Likewise.
4678         * testsuite/30_threads/barrier/arrive.cc: Likewise.
4679         * testsuite/30_threads/barrier/completion.cc: Likewise.
4680
4681 2021-01-07  Patrick Palka  <ppalka@redhat.com>
4682
4683         PR libstdc++/98384
4684         * testsuite/20_util/to_chars/long_double.cc: Use nexttowardl
4685         instead of the non-standard nextupl and nextdownl.
4686
4687 2021-01-05  Samuel Thibault  <samuel.thibault@ens-lyon.org>
4688
4689         * configure: Re-generate.
4690
4691 2021-01-05  Ed Smith-Rowland  <3dw4rd@verizon.net>
4692
4693         * include/precompiled/stdc++.h: Add <source_location> to C++20 section.
4694
4695 2021-01-01  Jakub Jelinek  <jakub@redhat.com>
4696
4697         * ChangeLog-2020: Rotate ChangeLog.  New file.
4698
4699 \f
4700 Copyright (C) 2021 Free Software Foundation, Inc.
4701
4702 Copying and distribution of this file, with or without modification,
4703 are permitted in any medium without royalty provided the copyright
4704 notice and this notice are preserved.