libstdc++-v3/ChangeLog

   1 2020-05-29  H.J. Lu  <hjl.tools@gmail.com>
   2
   3         PR bootstrap/95413
   4         * configure: Regenerated.
   5
   6 2020-05-29  François Dumont  <fdumont@gcc.gnu.org>
   7
   8         PR libstdc++/95079
   9         * include/bits/hashtable_policy.h (_Insert_base<>::try_emplace): New.
  10         * include/bits/unordered_map.h (unordered_map<>::try_emplace): Adapt.
  11         (unordered_map<>::insert_or_assign): Adapt.
  12
  13 2020-05-27  Jonathan Wakely  <jwakely@redhat.com>
  14
  15         PR libstdc++/95282
  16         * include/bits/atomic_base.h (__atomic_impl::load): Add
  17         cv-qualifiers to parameter so that _Tp is deduced as the
  18         unqualified type.
  19         * testsuite/29_atomics/atomic_float/95282.cc: New test.
  20
  21 2020-05-27  Jonathan Wakely  <jwakely@redhat.com>
  22
  23         PR libstdc++/95322
  24         * include/std/ranges (transform_view::_Sentinel): Allow hidden
  25         friends to work with _Iterator<true> and _Iterator<false>.
  26         (join_view::_Sentinel): Likewise.
  27         * testsuite/std/ranges/adaptors/95322.cc: New test.
  28
  29 2020-05-27  Jonathan Wakely  <jwakely@redhat.com>
  30
  31         PR libstdc++/94354
  32         * include/bits/stl_iterator.h (reverse_iterator): Fix comparison
  33         operators to use the correct operations on the underlying
  34         iterators.
  35         * testsuite/24_iterators/reverse_iterator/rel_ops.cc: New test.
  36
  37 2020-05-27  Jonathan Wakely  <jwakely@redhat.com>
  38
  39         * testsuite/18_support/comparisons/categories/zero_neg.cc: New test.
  40
  41 2020-05-26  Patrick Palka  <ppalka@redhat.com>
  42
  43         PR libstdc++/95322
  44         * include/bits/stl_iterator.h (__detail::_Common_iter_proxy):
  45         Remove and instead define it ...
  46         (common_iterator::_Proxy): ... here.
  47         (common_iterator::operator->): Use it.
  48         * testsuite/24_iterators/common_iterator/2.cc: New test.
  49         * testsuite/std/ranges/adaptors/95322.cc: New test.
  50
  51 2020-05-23  Patrick Palka  <ppalka@redhat.com>
  52
  53         PR libstdc++/93978
  54         * testsuite/std/ranges/adaptors/93978.cc: Add -Wall to
  55         dg-additional-options.  Avoid unused-but-set-variable warning.
  56
  57 2020-05-23  Jonathan Wakely  <jwakely@redhat.com>
  58
  59         PR libstdc++/95289
  60         * include/debug/helper_functions.h (__get_distance): Only declare
  61         as a constexpr function for C++14 and up.
  62         * testsuite/25_algorithms/copy/debug/95289.cc: New test.
  63
  64         * include/bits/fs_path.h (__detail::_S_range_begin)
  65         (__detail::_S_range_end, path::_S_string_from_iter): Replace with
  66         overloaded function template __detail::__effective_range.
  67         (__detail::__effective_range): New overloaded function template to
  68         create a basic_string or basic_string_view for an effective range.
  69         (__detail::__value_type_is_char): Use __detail::__effective_range.
  70         Do not use remove_const on value type.
  71         (__detail::__value_type_is_char_or_char8_t): Likewise.
  72         (path::path(const Source&, format))
  73         (path::path(const Source&, const locale&))
  74         (path::operator/=(const Source&), path::append(const Source&))
  75         (path::concat(const Source&)): Use __detail::__effective_range.
  76         (path::_S_to_string(InputIterator, InputIterator)): New function
  77         template to create a string view if possible, or string otherwise.
  78         (path::_S_convert): Add overloads that convert a string returned
  79         by __detail::__effective_range. Use if-constexpr to inline conversion
  80         logic from all overloads of _Cvt::_S_convert.
  81         (path::_S_convert_loc): Add overload that converts a string. Use
  82         _S_to_string to avoid allocation when possible.
  83         (path::_Cvt): Remove.
  84         (path::operator+=(CharT)): Remove indirection through path::concat.
  85         * include/experimental/bits/fs_path.h (path::_S_convert_loc): Add
  86         overload for non-const pointers, to avoid constructing a std::string.
  87         * src/c++17/fs_path.cc (path::_S_convert_loc): Replace conditional
  88         compilation with call to _S_convert.
  89
  90         * include/bits/fs_path.h (__detail::_S_range_begin)
  91         (__detail::_S_range_end): Remove unintentional static specifiers.
  92         * include/experimental/bits/fs_path.h (__detail::_S_range_begin)
  93         (__detail::_S_range_end): Likewise.
  94
  95         * include/bits/fs_path.h (filesystem::__detail::__is_encoded_char):
  96         Replace alias template with variable template. Don't remove const.
  97         (filesystem::__detail::__is_path_src): Replace overloaded function
  98         template with variable template and specializations.
  99         (filesystem::__detail::__is_path_iter_src): Replace alias template
 100         with class template.
 101         (filesystem::__detail::_Path): Use __is_path_src. Remove support for
 102         iterator pairs.
 103         (filesystem::__detail::_Path2): New alias template for checking
 104         InputIterator requirements.
 105         (filesystem::__detail::__constructible_from): Remove.
 106         (filesystem::path): Replace _Path<Iter, Iter> with _Path2<Iter>.
 107         * testsuite/27_io/filesystem/path/construct/80762.cc: Check with two
 108         constructor arguments of void and void* types.
 109
 110 2020-05-21  Matthias Kretz  <kretz@kde.org>
 111
 112         * testsuite/Makefile.am: Remove dup target_triplet and set tool,
 113         allowing runtest to work without arguments.
 114         * testsuite/Makefile.in: Regenerate.
 115
 116 2020-05-21  Jonathan Wakely  <jwakely@redhat.com>
 117
 118         PR libstdc++/93983
 119         * include/bits/iterator_concepts.h (__detail::__cpp17_iterator):
 120         Reorder constraints to avoid recursion when constructors use
 121         iterator_traits (LWG 3420).
 122         * testsuite/24_iterators/customization_points/lwg3420.cc: New test.
 123
 124         * include/experimental/socket (basic_socket::is_open()
 125         (basic_socket_acceptor::is_open()): Use _GLIBCXX_NODISCARD macro.
 126
 127         * include/experimental/bits/net.h (__endpoint, __protocol)
 128         (__acceptable_protocol, __inet_protocol): New concepts.
 129         (__detail::__is_endpoint): Move trait from <experimental/socket>.
 130         (__is_protocol, __is_acceptable_protocol, __is_inet_protocol): New
 131         traits.
 132         (__endpoint, __protocol, __acceptable_protocol): New variable
 133         templates.
 134         * include/experimental/socket (__is_endpoint): Move to net.h header.
 135         (basic_socket, basic_socket_acceptor): Check requirements.
 136
 137         * include/experimental/executor (use_future_t::use_future_t()): Fix
 138         incorrect noexcept-specifier.
 139         * include/experimental/internet (basic_resolver_results): Adjust
 140         whitespace.
 141         * include/experimental/socket (__basic_socket_impl::release): Add
 142         member function.
 143         (basic_socket(io_context&, const endpoint_type&)): Fix argument to
 144         target constructor.
 145         (basic_socket::release(), basic_socket::release(error_code&)): Add
 146         missing member functions.
 147         (basic_socket::is_open()): Add nodiscard attribute.
 148         (basic_socket::close(error_code&)): Pass argument to base function.
 149         (basic_socket_acceptor::release())
 150         (basic_socket_acceptor::release(error_code&)): Add missing member
 151         functions.
 152         (basic_socket_acceptor::is_open()): Add nodiscard attribute.
 153         (basic_socket_streambuf::error()): Add noexcept.
 154         (basic_socket_iostream::error()): Likewise.
 155         * testsuite/experimental/net/socket/basic_socket.cc: New test.
 156
 157         * include/experimental/buffer: Replace typedefs with
 158         alias-declarations.
 159         * include/experimental/executor: Likewise.
 160         * include/experimental/internet: Likewise.
 161         * include/experimental/socket: Likewise.
 162         * include/experimental/timer: Likewise.
 163
 164 2020-05-19  Jonathan Wakely  <jwakely@redhat.com>
 165
 166         PR libstdc++/94087
 167         * src/c++11/random.cc (__x86_rdseed): Allow fallback function to be
 168         passed in.
 169         (__x86_rdseed_rdrand): New function that uses rdseed with rdrand
 170         fallback.
 171         (random_device::_M_init): Use __x86_rdseed_rdrand when both
 172         instructions are available.
 173         * testsuite/26_numerics/random/random_device/94087.cc: New test.
 174
 175 2020-05-19  Patrick Palka  <ppalka@redhat.com>
 176
 177         PR c++/66439
 178         * testsuite/20_util/pair/astuple/get_neg.cc: Prune "type/value
 179         mismatch" messages.
 180         * testsuite/20_util/tuple/element_access/get_neg.cc: Likewise.
 181
 182 2020-05-15  H.J. Lu  <hongjiu.lu@intel.com>
 183
 184         PR bootstrap/95147
 185         * configure: Regenerated.
 186
 187 2020-05-14  H.J. Lu  <hongjiu.lu@intel.com>
 188
 189         * configure: Regenerated.
 190
 191 2020-05-13  Alexandre Oliva <oliva@adacore.com>
 192
 193         PR libstdc++/77691
 194         * include/experimental/memory_resource
 195         (__resource_adaptor_imp::do_allocate): Handle max_align_t on
 196         x86-vxworks as on x86-solaris.
 197         (__resource_adaptor_imp::do_deallocate): Likewise.
 198         * testsuite/experimental/memory_resource/new_delete_resource.cc:
 199         Drop xfail.
 200         (BAD_MAX_ALIGN_T): Define on x86-vxworks as on x86-solaris.
 201         (test03): Drop max-align test for char-aligned alloc.
 202
 203 2020-05-08  Ulrich Drepper  <drepper@redhat.com>
 204
 205         * include/bits/atomic_base.h (atomic_flag): Implement test member
 206         function.
 207         * include/std/version: Define __cpp_lib_atomic_flag_test.
 208         * testsuite/29_atomics/atomic_flag/test/explicit.cc: New file.
 209         * testsuite/29_atomics/atomic_flag/test/implicit.cc: New file.
 210
 211 2020-05-07  Jonathan Wakely  <jwakely@redhat.com>
 212
 213         PR libstdc++/94971 (partial)
 214         * include/bits/ranges_algo.h (ranges::__sample_fn): Qualify
 215         std::sample using macro to work in parallel mode.
 216         (__sort_fn): Likewise for std::sort.
 217         (ranges::__nth_element_fn): Likewise for std::nth_element.
 218         * include/bits/stl_algobase.h (lexicographical_compare_three_way):
 219         Likewise for std::__min_cmp.
 220         * include/parallel/algobase.h (lexicographical_compare_three_way):
 221         Add to namespace std::__parallel.
 222
 223         PR c/92472
 224         * include/parallel/multiway_merge.h (_GuardedIterator::operator*)
 225         (_GuardedIterator::operator _RAIter, _UnguardedIterator::operator*)
 226         (_UnguardedIterator::operator _RAIter): Add const qualifier.
 227         (operator<(_GuardedIterator&, _GuardedIterator&)
 228         (operator<=(_GuardedIterator&, _GuardedIterator&)
 229         (operator<(_UnguardedIterator&, _UnguardedIterator&)
 230         (operator<=(_UnguardedIterator&, _UnguardedIterator&): Change
 231         parameters to const references.
 232
 233 2020-05-07  Eric Botcazou  <ebotcazou@adacore.com>
 234
 235         * config/abi/post/sparc64-linux-gnu/baseline_symbols.txt: Update.
 236         * config/abi/post/sparc64-linux-gnu/32/baseline_symbols.txt: Likewise.
 237
 238 2020-05-06  François Dumont  <fdumont@gcc.gnu.org>
 239
 240         * include/bits/stl_algobase.h (struct _Bit_iterator): New declaration.
 241         (std::__fill_a1(_Bit_iterator, _Bit_iterator, const bool&)): Likewise.
 242         * include/bits/stl_bvector.h (__fill_bvector): Move outside
 243         _GLIBCXX_STD_C namespace.
 244         (fill(_Bit_iterator, _Bit_iterator, const bool&)): Likewise and rename
 245         into...
 246         (__fill_a1): ...this.
 247         * testsuite/25_algorithms/fill/bvector/1.cc: New.
 248
 249 2020-05-06  H.J. Lu  <hongjiu.lu@intel.com>
 250
 251         * config/abi/post/x86_64-linux-gnu/x32/baseline_symbols.txt: Updated.
 252
 253 2020-05-06  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
 254
 255         * config/abi/post/i386-solaris/baseline_symbols.txt: Regenerate.
 256         * config/abi/post/i386-solaris/amd64/baseline_symbols.txt:
 257         Likewise.
 258         * config/abi/post/sparc-solaris/baseline_symbols.txt: Likewise.
 259         * config/abi/post/sparc-solaris/sparcv9/baseline_symbols.txt:
 260         Likewise.
 261
 262 2020-05-06  Martin Liska  <mliska@suse.cz>
 263
 264         Revert:
 265         2020-05-05  Martin Liska  <mliska@suse.cz>
 266         PR c/92472
 267         * include/parallel/multiway_merge.h:
 268         Use const for _Compare template argument.
 269
 270 2020-05-06  Jonathan Wakely  <jwakely@redhat.com>
 271
 272         * doc/xml/manual/abi.xml (abi.versioning.history): Document library
 273         versions for GCC 9.[123] and 10.1 releases.
 274         * doc/html/*: Regenerate.
 275
 276 2020-05-06  Jakub Jelinek  <jakub@redhat.com>
 277
 278         * config/abi/post/x86_64-linux-gnu/baseline_symbols.txt: Update.
 279         * config/abi/post/x86_64-linux-gnu/32/baseline_symbols.txt: Update.
 280         * config/abi/post/i386-linux-gnu/baseline_symbols.txt: Update.
 281         * config/abi/post/i486-linux-gnu/baseline_symbols.txt: Update.
 282         * config/abi/post/aarch64-linux-gnu/baseline_symbols.txt: Update.
 283         * config/abi/post/s390x-linux-gnu/baseline_symbols.txt: Update.
 284         * config/abi/post/powerpc64-linux-gnu/baseline_symbols.txt: Update.
 285
 286 2020-05-05  Martin Liska  <mliska@suse.cz>
 287
 288         PR c/92472
 289         * include/parallel/multiway_merge.h:
 290         Use const for _Compare template argument.
 291
 292 2020-05-04  Fangrui Song  <maskray@google.com>
 293
 294         * libsupc++/cxxabi.h (__cxa_finalize): Fix return type.
 295
 296 2020-05-04  Jonathan Wakely  <jwakely@redhat.com>
 297
 298         * doc/xml/faq.xml: Use working link for SGI STL FAQ.
 299         * doc/html/*: Regenerate.
 300
 301         PR libstdc++/94906
 302         * src/c++17/memory_resource.cc
 303         (monotonic_buffer_resource::_Chunk::release): Use size_t for shift
 304         operands.
 305
 306 2020-05-04  Nathan Sidwell  <nathan@acm.org>
 307
 308         PR libstdc++/94747
 309         * libsupc++/dyncast.cc (__dynamic_cast): Cast offsetof to
 310         ptrdiff_t before negation, to show intent more clearly.
 311
 312 2020-05-04  Jonathan Wakely  <jwakely@redhat.com>
 313
 314         PR libstdc++/94936
 315         * src/c++17/memory_resource.cc (synchronized_pool_resource::_TPools):
 316         Add comment about single-threaded behaviour.
 317         (synchronized_pool_resource::_TPools::move_nonempty_chunks()): Hoist
 318         class member access out of loop.
 319         (synchronized_pool_resource::synchronized_pool_resource())
 320         (synchronized_pool_resource::~synchronized_pool_resource())
 321         (synchronized_pool_resource::release()): Check __gthread_active_p
 322         before creating and/or deleting the thread-specific data key.
 323         (synchronized_pool_resource::_M_thread_specific_pools()): Adjust
 324         assertions.
 325         (synchronized_pool_resource::do_allocate(size_t, size_t)): Add fast
 326         path for single-threaded case.
 327         (synchronized_pool_resource::do_deallocate(void*, size_t, size_t)):
 328         Likewise. Return if unable to find a pool that owns the allocation.
 329         * testsuite/20_util/synchronized_pool_resource/allocate_single.cc:
 330         New test.
 331         * testsuite/20_util/synchronized_pool_resource/cons_single.cc: New
 332         test.
 333         * testsuite/20_util/synchronized_pool_resource/release_single.cc: New
 334         test.
 335
 336 2020-05-03  Jonathan Wakely  <jwakely@redhat.com>
 337
 338         PR libstdc++/94933
 339         * include/bits/stl_algobase.h (__fill_a1): Make overload for byte types
 340         usable in constant expressions.
 341         * testsuite/25_algorithms/fill_n/constexpr.cc: Test with bytes and
 342         non-scalars.
 343
 344 2020-05-01  Jonathan Wakely  <jwakely@redhat.com>
 345
 346         PR libstdc++/94901
 347         * testsuite/17_intro/badnames.cc: Test values between _E9 and _E24 too.
 348
 349 2020-05-01  Jonathan Wakely  <jwakely@redhat.com>
 350             Patrick Palka  <ppalka@redhat.com>
 351
 352         PR libstdc++/92894
 353         * include/bits/iterator_concepts.h (ranges::__cust_imove::_IMove):
 354         Add trait to determine return type and an alias for it.
 355         (ranges::__cust_imove::_IMove::operator()): Use __result instead of
 356         deduced return type.
 357         (iter_rvalue_reference_t): Use _IMove::__type instead of checking
 358         the result of ranges::iter_move.
 359         (__detail::__indirectly_readable_impl): Use iter_rvalue_reference_t
 360         instead of checking the result of ranges::iter_move.
 361         * testsuite/24_iterators/customization_points/92894.cc: New test.
 362         * testsuite/24_iterators/indirect_callable/92894.cc: New test.
 363
 364 2020-05-01  Jonathan Wakely  <jwakely@redhat.com>
 365
 366         PR libstdc++/94901
 367         * include/std/type_traits (__is_complete_or_unbounded): Replace
 368         BADNAME _T with _Tp.
 369         * testsuite/17_intro/badnames.cc: New test.
 370
 371 2020-04-30  Jonathan Wakely  <jwakely@redhat.com>
 372
 373         PR libstdc++/89510
 374         * include/bits/alloc_traits.h (allocator_traits::_S_construct)
 375         (allocator_traits::_S_destroy)
 376         (allocator_traits<allocator<T>>::construct): Use traits in
 377         noexcept-specifiers.
 378         * include/bits/allocator.h (allocator<void>::construct)
 379         (allocator<void>::destroy): Likewise.
 380         * include/ext/malloc_allocator.h (malloc_allocator::construct)
 381         (malloc_allocator::destroy): Likewise.
 382         * include/ext/new_allocator.h (new_allocator::construct)
 383         (new_allocator::destroy): Likewise.
 384         * testsuite/20_util/allocator/89510.cc: New test.
 385         * testsuite/ext/malloc_allocator/89510.cc: New test.
 386         * testsuite/ext/new_allocator/89510.cc: New test.
 387
 388 2020-04-29  Jonathan Wakely  <jwakely@redhat.com>
 389
 390         PR libstdc++/94854
 391         * include/bits/basic_string.tcc: Update comment about explicit
 392         instantiations.
 393
 394 2020-04-28  Jonathan Wakely  <jwakely@redhat.com>
 395
 396         PR libstdc++/91480
 397         * include/bits/allocator.h (__cpp_lib_allocator_is_always_equal):
 398         Remove non-standard macro.
 399         * include/bits/stl_iterator.h (__cpp_lib_constexpr_iterator): Define
 400         to indicate P1032R1 support.
 401         * include/bits/stl_pair.h (__cpp_lib_constexpr_utility): Likewise.
 402         * include/std/string_view (__cpp_lib_constexpr_string_view): Likewise.
 403         * include/std/tuple (__cpp_lib_constexpr_tuple): Likewise.
 404         * include/std/version (__cpp_lib_allocator_is_always_equal): Remove.
 405         (__cpp_lib_constexpr_iterator, __cpp_lib_constexpr_string_view)
 406         (__cpp_lib_constexpr_tuple, __cpp_lib_constexpr_utility): Define.
 407         * testsuite/20_util/function_objects/constexpr_searcher.cc: Check
 408         feature test macro.
 409         * testsuite/20_util/tuple/cons/constexpr_allocator_arg_t.cc: Likewise.
 410         * testsuite/21_strings/basic_string_view/operations/copy/char/
 411         constexpr.cc: Likewise.
 412         * testsuite/24_iterators/insert_iterator/constexpr.cc: Likewise.
 413
 414         PR libstdc++/94831
 415         * include/bits/alloc_traits.h (_S_construct): Restore placement
 416         new-expression for C++11/14/17 and call std::construct_at directly
 417         for C++20.
 418         * include/bits/stl_construct.h (_Construct): Revert to non-constexpr
 419         function returning void.
 420         * testsuite/20_util/specialized_algorithms/
 421         uninitialized_value_construct/94831.cc: New test.
 422         * testsuite/23_containers/vector/cons/94831.cc: New test.
 423
 424 2020-04-28  Patrick Palka  <ppalka@redhat.com>
 425
 426         LWG 3433 subrange::advance(n) has UB when n < 0
 427         * include/std/ranges (subrange::prev): Fix typo.
 428         (subrange::advance): Handle a negative argument as per the proposed
 429         resolution of LWG 3433.
 430         * testsuite/std/ranges/subrange/lwg3433.cc: New test.
 431
 432 2020-04-28  Jonathan Wakely  <jwakely@redhat.com>
 433             Iain Sandoe  <iain@sandoe.co.uk>
 434
 435         PR c++/94759
 436         * include/std/coroutine: Implement handing for non-
 437         class coroutine return types.
 438
 439 2020-04-24  Jonathan Wakely  <jwakely@redhat.com>
 440
 441         * include/experimental/executor (service_already_exists): Make default
 442         constructor public (LWG 3414).
 443         * testsuite/experimental/net/execution_context/make_service.cc: Check
 444         the service_already_exists can be default constructed.
 445
 446 2020-04-24  Kamlesh Kumar  <kamleshbhalui@gmail.com>
 447             Jonathan Wakely  <jwakely@redhat.com>
 448
 449         PR libstdc++/90415
 450         PR libstdc++/92156
 451         * include/std/any (any): Rename template parameters for consistency
 452         with the standard.
 453         (any::_Decay): Rename to _Decay_if_not_any.
 454         (any::any(T&&):: Remove is_constructible from constraints. Remove
 455         non-standard overload.
 456         (any::any(in_place_type_t<T>, Args&&...))
 457         (any::any(in_place_type_t<T>, initializer_list<U>, Args&&...))
 458         (any::emplace(Args&&...))
 459         (any::emplace(initializer_list<U>, Args&&...)):
 460         Use decay_t instead of _Decay.
 461         * testsuite/20_util/any/cons/90415.cc: New test.
 462         * testsuite/20_util/any/cons/92156.cc: New Test.
 463         * testsuite/20_util/any/misc/any_cast_neg.cc: Make dg-error directives
 464         more robust.
 465         * testsuite/20_util/any/modifiers/92156.cc: New test.
 466
 467 2020-04-23  Jonathan Wakely  <jwakely@redhat.com>
 468
 469         * doc/xml/manual/status_cxx2020.xml: Update C++20 status table.
 470         * doc/html/*: Regenerate.
 471
 472         * include/bits/stl_iterator.h (__cpp_lib_array_constexpr): Revert
 473         value for C++17 to 201803L because P0858R0 is supported for C++17.
 474         * include/std/version (__cpp_lib_array_constexpr): Likewise.
 475         * testsuite/23_containers/array/element_access/constexpr_c++17.cc:
 476         Check for value corresponding to P0031R0 features being tested.
 477         * testsuite/23_containers/array/requirements/constexpr_iter.cc:
 478         Check for value corresponding to P0858R0 features being tested.
 479
 480         * include/std/version (__cpp_lib_three_way_comparison): Define for
 481         freestanding builds.
 482
 483 2020-04-23  Thomas Rodgers  <rodgert@appliantology.com>
 484
 485         * include/experimental/net/executor (system_context): Mark
 486         system_context::system_context() = delete.
 487         * testsuite/experimental/net/executor/1.cc: Add new
 488         test to check system_context is not default constructible.
 489
 490 2020-04-23  Iain Sandoe  <iain@sandoe.co.uk>
 491
 492         * include/std/coroutine: Update the inline namespace to __n4861.
 493         Add the __cpp_lib_coroutine define, set to 201902L.
 494         * include/std/version: Add __cpp_lib_coroutine, set to 201902L.
 495
 496 2020-04-22  Jonathan Wakely  <jwakely@redhat.com>
 497
 498         * include/std/execution (__cpp_lib_execution): Define to indicate
 499         support for P0024R2 and P1001R2.
 500         * include/std/version (__cpp_lib_execution): Define.
 501         * testsuite/25_algorithms/pstl/feature_test.cc: Only test macro
 502         defined by <algorithm>, move other tests to new tests ...
 503         * testsuite/25_algorithms/pstl/feature_test-2.cc: New test.
 504         * testsuite/25_algorithms/pstl/feature_test-3.cc: New test.
 505         * testsuite/25_algorithms/pstl/feature_test-4.cc: New test.
 506         * testsuite/25_algorithms/pstl/feature_test-5.cc: New test.
 507
 508         * include/bits/stl_iterator.h (__cpp_lib_array_constexpr): Define
 509         different values for C++17 and C++20, to indicate different feature
 510         sets. Update value for C++20 to indicate P1032R1 support.
 511         * include/std/version (__cpp_lib_array_constexpr): Likewise.
 512         * testsuite/23_containers/array/comparison_operators/constexpr.cc:
 513         Check feature test macro.
 514         * testsuite/23_containers/array/element_access/constexpr_c++17.cc:
 515         New test.
 516         * testsuite/23_containers/array/requirements/constexpr_fill.cc: Check
 517         feature test macro.
 518         * testsuite/23_containers/array/requirements/constexpr_iter.cc: Test
 519         in C++17 mode and check feature test macro.
 520
 521         * include/std/utility (__cpp_lib_constexpr_algorithms): Do not define
 522         here.
 523         * testsuite/20_util/exchange/constexpr.cc: Do not expect macro to be
 524         defined by <utility>.
 525
 526         * include/std/functional (__cpp_lib_concepts): Update macro value to
 527         indicate P1964R2 support.
 528         * include/std/version (__cpp_lib_concepts): Likewise.
 529         * testsuite/std/concepts/1.cc: Adjust expected value.
 530         * testsuite/std/concepts/2.cc: Likewise.
 531
 532         * include/std/functional (__cpp_lib_constexpr_invoke): Rename to
 533         __cpp_lib_constexpr_functional.
 534         * include/std/version (__cpp_lib_constexpr_invoke): Likewise.
 535         * testsuite/20_util/function_objects/invoke/constexpr.cc: Adjust.
 536
 537         * include/bits/ptr_traits.h (__cpp_lib_constexpr_memory): Define to
 538         indicate P1006R1 support.
 539         (__cpp_lib_to_address): Define to indicate P0653R2 support.
 540         * include/bits/range_access.h (__cpp_lib_ssize): Define to indicate
 541         P1227R2 support.
 542         * include/bits/ranges_algo.h (__cpp_lib_shift): Define to indicate
 543         P0769R2 support.
 544         * include/std/atomic (__cpp_lib_atomic_float): Define to indicate
 545         P0020R6 support.
 546         * include/std/memory (__cpp_lib_assume_aligned): Define to indicate
 547         P1007R3 support.
 548         * include/std/memory_resource (__cpp_lib_polymorphic_allocator):
 549         Define to indicate P0339R6 support.
 550         * include/std/string_view (__cpp_lib_starts_ends_with): Define to
 551         indicate P0457R2 support.
 552         * include/std/type_traits (__cpp_lib_is_nothrow_convertible): Define
 553         to indicate P0758R1 support.
 554         (__cpp_lib_remove_cvref): Define to indicate P0550R2 support.
 555         (__cpp_lib_type_identity): Define to indicate P0887R1 support.
 556         * include/std/version (__cpp_lib_atomic_float)
 557         (__cpp_lib_is_nothrow_convertible, __cpp_lib_remove_cvref)
 558         (__cpp_lib_type_identity, __cpp_lib_assume_aligned)
 559         (__cpp_lib_constexpr_memory, __cpp_lib_polymorphic_allocator)
 560         (__cpp_lib_shift, __cpp_lib_ssize, __cpp_lib_starts_ends_with)
 561         (__cpp_lib_to_address): Define.
 562         * testsuite/20_util/to_address/1_neg.cc: Adjust dg-error line number.
 563
 564         * include/bits/stl_map.h (__cpp_lib_map_insertion): Remove old
 565         macro.
 566         * include/bits/unordered_map.h (__cpp_lib_unordered_map_insertion):
 567         Likewise.
 568         * include/std/version (__cpp_lib_map_insertion)
 569         (__cpp_lib_unordered_map_insertion): Remove.
 570
 571         * include/std/condition_variable (__cpp_lib_jthread): Remove
 572         redundant definition.
 573         * include/std/stop_token (__cpp_lib_jthread): Update macro value to
 574         indicate P1869R1 support.
 575         * include/std/version (__cpp_lib_jthread): Update value.
 576         * testsuite/30_threads/condition_variable_any/stop_token/1.cc: Check
 577         for updated macro value.
 578         * testsuite/30_threads/condition_variable_any/stop_token/2.cc:
 579         Likewise.
 580         * testsuite/30_threads/jthread/1.cc: Likewise.
 581         * testsuite/30_threads/jthread/2.cc: Likewise.
 582         * testsuite/30_threads/stop_token/1.cc: Likewise.
 583         * testsuite/30_threads/stop_token/2.cc: Likewise.
 584
 585         * testsuite/21_strings/basic_string/erasure.cc: Check for
 586         __cpp_lib_erase_if macro.
 587         * testsuite/23_containers/deque/erasure.cc: Add header name to #error
 588         messages.
 589         * testsuite/23_containers/forward_list/erasure.cc: Likewise.
 590         * testsuite/23_containers/list/erasure.cc: Likewise.
 591         * testsuite/23_containers/map/erasure.cc: Likewise.
 592         * testsuite/23_containers/set/erasure.cc: Likewise.
 593         * testsuite/23_containers/unordered_map/erasure.cc: Likewise.
 594         * testsuite/23_containers/unordered_set/erasure.cc: Likewise.
 595         * testsuite/23_containers/vector/erasure.cc: Likewise.
 596
 597 2020-04-21  Jonathan Wakely  <jwakely@redhat.com>
 598
 599         * include/bits/stl_iterator.h (__normal_iterator): Use synth-three-way
 600         to define operator<=>.
 601         * testsuite/24_iterators/normal_iterator/cmp_c++20.cc: New test.
 602
 603         * doc/Makefile.am (xml_sources_manual): Add missing XML files.
 604         * doc/Makefile.in: Regenerate.
 605         * doc/xml/manual/status_cxx1998.xml: Refer to "this section" instead
 606         of "this page".
 607         * doc/xml/manual/status_cxx2011.xml: Formatting and other corrections
 608         to the C++11 status table.
 609         * doc/xml/manual/status_cxx2014.xml: Replace list of C++14 feature
 610         proposals with table matching contents of the C++14 standard.
 611         * doc/xml/manual/status_cxx2017.xml: Add table matching contents of
 612         the C++17 standard.
 613         * doc/html/*: Regenerate.
 614
 615         PR c++/94149
 616         * include/std/type_traits (__is_nt_constructible_impl): Add partial
 617         specializations for bounded arrays with non-empty initializers.
 618         * testsuite/20_util/is_nothrow_constructible/value_c++20.cc: New test.
 619
 620 2020-04-20  Thomas Rodgers  <trodgers@redhat.com>
 621
 622         * testsuite/lib/libstdc++.exp: Add additional_flags=
 623         -DTBB_SUPRESS_DEPRECATED_MESSAGES=1 to suppress warnings when
 624         compiling with a newer Thread Building Blocks.
 625
 626 2020-04-20  Jonathan Wakely  <jwakely@redhat.com>
 627
 628         * testsuite/24_iterators/istreambuf_iterator/sentinel.cc: New test.
 629
 630         * testsuite/20_util/is_constructible/51185.cc: Make test class a
 631         non-aggregate so that the test verifies the same thing in all -std
 632         modes.
 633         * testsuite/20_util/is_constructible/value-2.cc: Adjust expected
 634         results for some types when paren-init for aggregates is supported.
 635
 636         * include/std/version (__cpp_lib_three_way_comparison): Update value.
 637         * libsupc++/compare (__cpp_lib_three_way_comparison): Likewise.
 638         (__detail::__synth3way): Add noexcept-specifier.
 639
 640         * include/bits/stl_map.h (map): Define operator<=> and remove
 641         operator< for C++20.
 642         * include/bits/stl_multimap.h (multimap): Likewise.
 643         * include/bits/stl_multiset.h (multiset): Likewise.
 644         * include/bits/stl_set.h (set): Likewise.
 645         * include/bits/stl_tree.h (_Rb_tree): Likewise.
 646         (_Rb_tree_iterator, _Rb_tree_const_iterator): Remove redundant
 647         operator!= for C++20.
 648         * include/debug/map.h (__gnu_debug::map): Define operator<=> for C++20.
 649         * include/debug/multimap.h (__gnu_debug::multimap): Likewise.
 650         * include/debug/multiset.h (__gnu_debug::multiset): Likewise.
 651         * include/debug/set.h (__gnu_debug::set): Likewise.
 652         * testsuite/23_containers/map/operators/cmp_c++20.cc: New test.
 653         * testsuite/23_containers/multimap/operators/cmp_c++20.cc: New test.
 654         * testsuite/23_containers/multiset/operators/cmp_c++20.cc: New test.
 655         * testsuite/23_containers/set/operators/cmp_c++20.cc: New test.
 656
 657 2020-04-20  Matthias Kretz  <kretz@kde.org>
 658
 659         * testsuite/lib/libstdc++.exp: Avoid illegal argument to verbose.
 660
 661 2020-04-19  Jonathan Wakely  <jwakely@redhat.com>
 662
 663         * include/bits/stl_queue.h (queue): Define operator<=> for C++20.
 664         * include/bits/stl_stack.h (stack): Likewise.
 665         * testsuite/23_containers/queue/cmp_c++20.cc: New test.
 666         * testsuite/23_containers/stack/cmp_c++20.cc: New test.
 667
 668         * include/bits/unordered_map.h (unordered_map, unordered_multimap):
 669         Remove redundant operator!= for C++20.
 670         * include/bits/unordered_set.h (unordered_set, unordered_multiset):
 671         Likewise.
 672         * include/debug/unordered_map (unordered_map, unordered_multimap):
 673         Likewise.
 674         * include/debug/unordered_set (unordered_set, unordered_multiset):
 675         Likewise.
 676
 677         PR other/94629
 678         * include/debug/formatter.h (_Error_formatter::_Parameter): Fix
 679         redundant assignment in constructor.
 680
 681 2020-04-18  Jonathan Wakely  <jwakely@redhat.com>
 682
 683         * include/std/chrono (duration, time_point): Define operator<=> and
 684         remove redundant operator!= for C++20.
 685         * testsuite/20_util/duration/comparison_operators/three_way.cc: New
 686         test.
 687         * testsuite/20_util/time_point/comparison_operators/three_way.cc: New
 688         test.
 689
 690         * testsuite/util/native_type/native_priority_queue.hpp: Use
 691         allocator_traits to rebind allocator.
 692
 693 2020-04-17  Jonathan Wakely  <jwakely@redhat.com>
 694
 695         * include/bits/forward_list.h (forward_list): Define operator<=> and
 696         remove redundant comparison operators for C++20.
 697         * include/bits/stl_bvector.h (vector<bool, Alloc>): Likewise.
 698         * include/bits/stl_deque.h (deque): Likewise.
 699         * include/bits/stl_iterator.h (__normal_iterator): Likewise.
 700         * include/bits/stl_list.h (list): Likewise.
 701         * include/bits/stl_vector.h (vector): Likewise.
 702         * include/debug/deque (__gnu_debug::deque): Likewise.
 703         * include/debug/forward_list (__gnu_debug::forward_list): Likewise.
 704         * include/debug/list (__gnu_debug::list): Likewise.
 705         * include/debug/safe_iterator.h (__gnu_debug::_Safe_iterator):
 706         Likewise.
 707         * include/debug/vector (__gnu_debug::vector): Likewise.
 708         * include/ext/pointer.h (__gnu_cxx::_Pointer_adapter): Define
 709         operator<=> for C++20.
 710         * testsuite/23_containers/deque/operators/cmp_c++20.cc: New test.
 711         * testsuite/23_containers/forward_list/cmp_c++20.cc: New test.
 712         * testsuite/23_containers/list/cmp_c++20.cc: New test.
 713         * testsuite/23_containers/vector/bool/cmp_c++20.cc: New test.
 714         * testsuite/23_containers/vector/cmp_c++20.cc: New test.
 715
 716         * include/bits/basic_string.h (basic_string): Define operator<=> and
 717         remove redundant comparison operators for C++20.
 718         * include/bits/char_traits.h (__gnu_cxx::char_traits, char_traits):
 719         Add comparison_category members.
 720         (__detail::__char_traits_cmp_cat): New helper to get comparison
 721         category from char traits class.
 722         * include/bits/regex.h (regex_traits::_RegexMask::operator!=): Do not
 723         define for C++20.
 724         (sub_match): Define operator<=> and remove redundant comparison
 725         operators for C++20.
 726         (match_results): Remove redundant operator!= for C++20.
 727         * include/std/string_view (basic_string_view): Define operator<=> and
 728         remove redundant comparison operators for C++20.
 729         * testsuite/21_strings/basic_string/operators/char/cmp_c++20.cc: New
 730         test.
 731         * testsuite/21_strings/basic_string/operators/wchar_t/cmp_c++20.cc:
 732         New test.
 733         * testsuite/21_strings/basic_string_view/operations/copy/char/
 734         constexpr.cc: Initialize variable.
 735         * testsuite/21_strings/basic_string_view/operations/copy/wchar_t/
 736         constexpr.cc: Likewise.
 737         * testsuite/21_strings/basic_string_view/operators/char/2.cc: Add
 738         dg-do directive and remove comments showing incorrect signatures.
 739         * testsuite/21_strings/basic_string_view/operators/wchar_t/2.cc:
 740         Likewise.
 741         * testsuite/21_strings/basic_string_view/operators/char/cmp_c++20.cc:
 742         New test.
 743         * testsuite/21_strings/basic_string_view/operators/wchar_t/cmp_c++20.cc:
 744         New test.
 745         * testsuite/28_regex/sub_match/compare_c++20.cc: New test.
 746
 747 2020-04-16  Jonathan Wakely  <jwakely@redhat.com>
 748
 749         * testsuite/20_util/unsynchronized_pool_resource/allocate.cc: Remove
 750         name of unused parameter.
 751
 752 2020-04-15  Jonathan Wakely  <jwakely@redhat.com>
 753
 754         * include/bits/fs_dir.h (file_status): Define operator== for C++20.
 755         (directory_entry): Define operator<=> and remove redundant comparison
 756         operators for C++20.
 757         * include/bits/fs_fwd.h (space_info): Define operator== for C++20.
 758         * include/bits/fs_path.h (path): Define operator<=> and remove
 759         redundant comparison operators for C++20.
 760         * testsuite/27_io/filesystem/path/compare/compare.cc: Fix comment.
 761         * testsuite/27_io/filesystem/path/compare/lwg2936.cc: Likewise.
 762         * testsuite/27_io/filesystem/path/compare/path.cc: Likewise.
 763         * testsuite/27_io/filesystem/path/compare/strings.cc: Likewise.
 764
 765         * include/bits/allocator.h (operator!=): Do not define for C++20.
 766         * include/bits/locale_classes.h (operator!=): Likewise.
 767         * include/bits/std_function.h (operator==(nullptr_t, const function&))
 768         (operator!=(const function&, nullptr_t))
 769         (operator!=(nullptr_t, const function&)): Likewise.
 770         * include/ext/bitmap_allocator.h (operator!=): Likewise.
 771         * include/ext/debug_allocator.h (operator!=): Likewise.
 772         * include/ext/extptr_allocator.h (operator!=): Likewise.
 773         * include/ext/malloc_allocator.h (operator!=): Likewise.
 774         * include/ext/mt_allocator.h (operator!=): Likewise.
 775         * include/ext/new_allocator.h (operator!=): Likewise.
 776         * include/ext/pool_allocator.h (operator!=): Likewise.
 777         * include/ext/throw_allocator.h (operator!=): Likewise.
 778         * include/std/bitset (bitset::operator!=): Likewise.
 779         * include/std/memory_resource (operator!=): Likewise.
 780         * include/std/scoped_allocator (operator!=): Likewise.
 781
 782         * include/std/typeindex (operator<=>): Define for C++20.
 783         * testsuite/20_util/typeindex/comparison_operators_c++20.cc: New test.
 784
 785 2020-04-14  Jonathan Wakely  <jwakely@redhat.com>
 786
 787         * libsupc++/compare (compare_three_way): Fix constraint so that
 788         BUILTIN-PTR-THREE-WAY does not require three_way_comparable_with.
 789         * testsuite/18_support/comparisons/object/builtin-ptr-three-way.cc:
 790         New test.
 791
 792         PR libstdc++/94562
 793         * include/bits/shared_ptr.h (operator<=>): Define for C++20.
 794         * include/bits/shared_ptr_base.h (operator<=>): Likewise.
 795         * include/bits/unique_ptr.h (operator<=>): Add inline specifier.
 796         * testsuite/20_util/shared_ptr/comparison/cmp_c++20.cc: New test.
 797         * testsuite/20_util/shared_ptr/comparison/less.cc: Do not expect
 798         std::less<A*> to be used when comparing std::shared_ptr<A> objects in
 799         C++20.
 800
 801         PR libstdc++/94565
 802         * libsupc++/compare (__unspec): Add noexcept-specifier to constructor.
 803         * testsuite/18_support/comparisons/categories/94565.cc: New test.
 804
 805 2020-04-13  Iain Sandoe  <iain@sandoe.co.uk>
 806
 807         * include/std/coroutine: Update coroutines builtin define,
 808         per n4861.
 809
 810 2020-04-09  Jonathan Wakely  <jwakely@redhat.com>
 811
 812         * libsupc++/compare (compare_three_way): Fix noexcept-specifier.
 813         (strong_order, weak_order, partial_order): Replace uses of <=> with
 814         compare_three_way function object (LWG 3324).
 815         * testsuite/18_support/comparisons/algorithms/partial_order.cc: Add
 816         equality operator so that X satisfies three_way_comparable.
 817         * testsuite/18_support/comparisons/algorithms/strong_order.cc:
 818         Likewise.
 819         * testsuite/18_support/comparisons/algorithms/weak_order.cc: Likewise.
 820
 821         * include/bits/unique_ptr.h (operator<=>): Define for C++20.
 822         * testsuite/20_util/default_delete/48631_neg.cc: Adjust dg-error line.
 823         * testsuite/20_util/default_delete/void_neg.cc: Likewise.
 824         * testsuite/20_util/unique_ptr/comparison/compare.cc: New test.
 825         * testsuite/20_util/unique_ptr/comparison/compare_c++20.cc: New test.
 826
 827 2020-04-08  Jonathan Wakely  <jwakely@redhat.com>
 828
 829         * include/bits/slice_array.h (operator==(const slice&, const slice&)):
 830         Define for C++20.
 831         * include/std/complex (operator==(const T&, const complex<T>&))
 832         (operator!=(const complex<T>&, const complex<T>&))
 833         (operator!=(const complex<T>&, const T&))
 834         (operator!=(const T&, const complex<T>&)): Do not declare for C++20.
 835         * testsuite/26_numerics/slice/compare.cc: New test.
 836
 837         * include/std/charconv (to_chars_result, from_chars_result): Add
 838         defaulted equality comparisons for C++20.
 839         * testsuite/20_util/from_chars/compare.cc: New test.
 840         * testsuite/20_util/to_chars/compare.cc: New test.
 841
 842 2020-04-07  Jonathan Wakely  <jwakely@redhat.com>
 843
 844         PR libstdc++/94520
 845         * include/std/charconv (__integer_to_chars_result_type)
 846         (__integer_from_chars_result_type): Use __or_ instead of __or_v_ to
 847         allow use in C++14.
 848         * testsuite/20_util/from_chars/1.cc: Run test as C++14 and replace
 849         use of std::string_view with std::string.
 850         * testsuite/20_util/from_chars/2.cc: Likewise.
 851         * testsuite/20_util/to_chars/1.cc: Likewise.
 852         * testsuite/20_util/to_chars/2.cc: Likewise.
 853
 854 2020-04-06  Jonathan Wakely  <jwakely@redhat.com>
 855
 856         PR libstdc++/94498
 857         * include/bits/char_traits.h (__gnu_cxx::char_traits::move): Make it
 858         usable in constant expressions for C++20.
 859         (__gnu_cxx::char_traits::copy, __gnu_cxx::char_traits::assign): Add
 860         _GLIBCXX20_CONSTEXPR.
 861         (std::char_traits<char>, std::char_traits<wchar_t>)
 862         (std::char_traits<char8_t>): Make move, copy and assign usable in
 863         constant expressions for C++20.
 864         (std::char_traits<char16_t>, std::char_traits<char32_t>): Make move
 865         and copy usable in constant expressions for C++20.
 866         * include/std/string_view (basic_string_view::copy): Add
 867         _GLIBCXX20_CONSTEXPR.
 868         * testsuite/21_strings/basic_string_view/operations/copy/char/
 869         constexpr.cc: New test.
 870         * testsuite/21_strings/basic_string_view/operations/copy/wchar_t/
 871         constexpr.cc: New test.
 872
 873 2020-04-05  Gerald Pfeifer  <gerald@pfeifer.com>
 874
 875         * doc/xml/manual/appendix_contributing.xml: Refer to Git
 876         documentation instead of Subversion.  Switch to https.
 877         * doc/html/manual/appendix_contributing.html: Regenerate.
 878
 879 2020-04-03  Jonathan Wakely  <jwakely@redhat.com>
 880
 881         PR libstdc++/93960
 882         * include/bits/ptr_traits.h (__to_address): Add special case for debug
 883         iterators, to avoid dereferenceable check.
 884         * testsuite/20_util/to_address/1_neg.cc: Adjust dg-error line number.
 885         * testsuite/20_util/to_address/debug.cc: New test.
 886
 887 2020-04-01  Andrea Corallo  <andrea.corallo@arm.com>
 888
 889         * testsuite/experimental/net/execution_context/use_service.cc:
 890         Require pthread and gthreads.
 891
 892 2020-04-01  Gerald Pfeifer  <gerald@pfeifer.com>
 893
 894         * doc/xml/manual/appendix_free.xml: Move "free books" list from
 895         fsf.org to gnu.org.
 896         * doc/html/manual/appendix_free.html: Regenerate.
 897
 898 2020-03-31  Ville Voutilainen  <ville.voutilainen@gmail.com>
 899
 900         Library-side tests for parenthesized aggregate init
 901
 902         PR c++/92878
 903         PR c++/92947
 904
 905         * testsuite/20_util/allocator_traits/members/92878_92947.cc: New.
 906         * testsuite/20_util/any/assign/92878_92947.cc: Likewise.
 907         * testsuite/20_util/any/cons/92878_92947.cc: Likewise.
 908         * testsuite/20_util/is_constructible/92878_92947.cc: Likewise.
 909         * testsuite/20_util/optional/assignment/92878_92947.cc: Likewise.
 910         * testsuite/20_util/optional/cons/92878_92947.cc: Likewise.
 911         * testsuite/20_util/pair/cons/92878_92947.cc: Likewise.
 912         * testsuite/20_util/shared_ptr/creation/92878_92947.cc: Likewise.
 913         * testsuite/20_util/specialized_algorithms/construct_at/92878_92947.cc:
 914         Likewise.
 915         * testsuite/20_util/unique_ptr/creation/92878_92947.cc: Likewise.
 916         * testsuite/20_util/uses_allocator/92878_92947.cc: Likewise.
 917         * testsuite/20_util/variant/92878_92947.cc: Likewise.
 918         * testsuite/23_containers/deque/modifiers/emplace/92878_92947.cc:
 919         Likewise.
 920         * testsuite/23_containers/forward_list/modifiers/92878_92947.cc:
 921         Likewise.
 922         * testsuite/23_containers/list/modifiers/emplace/92878_92947.cc:
 923         Likewise.
 924         * testsuite/23_containers/map/modifiers/emplace/92878_92947.cc:
 925         Likewise.
 926         * testsuite/23_containers/multimap/modifiers/emplace/92878_92947.cc:
 927         Likewise.
 928         * testsuite/23_containers/multiset/modifiers/emplace/92878_92947.cc:
 929         Likewise.
 930         * testsuite/23_containers/priority_queue/92878_92947.cc: Likewise.
 931         * testsuite/23_containers/queue/92878_92947.cc: Likewise.
 932         * testsuite/23_containers/set/modifiers/emplace/92878_92947.cc:
 933         Likewise.
 934         * testsuite/23_containers/stack/92878_92947.cc: Likewise.
 935         * testsuite/23_containers/unordered_map/modifiers/92878_92947.cc:
 936         Likewise.
 937         * testsuite/23_containers/unordered_multimap/modifiers/92878_92947.cc:
 938         Likewise.
 939         * testsuite/23_containers/unordered_multiset/modifiers/92878_92947.cc:
 940         Likewise.
 941         * testsuite/23_containers/unordered_set/modifiers/92878_92947.cc:
 942         Likewise.
 943         * testsuite/23_containers/vector/modifiers/emplace/92878_92947.cc:
 944         Likewise.
 945
 946 2020-03-28  Jonathan Wakely  <jwakely@redhat.com>
 947
 948         * testsuite/20_util/is_constructible/value-2.cc: Fix test to account
 949         for changes due to parenthesized aggregate-initialization in C++20.
 950         * testsuite/20_util/time_point/cons/81468.cc: Fix test to not clash
 951         with std::chrono::sys_time in C++20.
 952
 953         * include/bits/stl_iterator.h (reverse_iterator): Use requires-clause
 954         to constrain C++20 versions of comparison operators. Fix backwards
 955         logic of relational operators.
 956         (move_iterator): Use requires-clause to constrain comparison operators
 957         in C++20. Do not declare non-standard same-type overloads for C++20.
 958         * testsuite/24_iterators/move_iterator/rel_ops_c++20.cc: Check result
 959         of comparisons and check using greedy_ops type.
 960         * testsuite/24_iterators/reverse_iterator/rel_ops_c++20.cc: Likewise.
 961         * testsuite/24_iterators/move_iterator/greedy_ops.cc: Remove redundant
 962         main function from compile-only test.
 963         * testsuite/24_iterators/reverse_iterator/greedy_ops.cc: Likewise.
 964
 965 2020-03-27  Jonathan Wakely  <jwakely@redhat.com>
 966
 967         * include/bits/range_cmp.h (__cpp_lib_ranges): Define.
 968         * include/bits/stl_iterator.h: Check value of __cpp_concepts so that
 969         C++20 concepts are required.
 970         * include/bits/stl_iterator_base_types.h: Likewise.
 971         * include/std/concepts: Likewise.
 972         * include/std/version: Likewise.
 973         * testsuite/std/ranges/headers/ranges/synopsis.cc: Check feature test
 974         macro.
 975
 976         * include/bits/stl_iterator.h (reverse_iterator::iterator_concept)
 977         (reverse_iterator::iterator_category): Define for C++20.
 978         (reverse_iterator): Define comparison operators correctly for C++20.
 979         (__normal_iterator): Add constraints to comparison operators for C++20.
 980         (move_iterator::operator++(int)) [__cpp_lib_concepts]: Define new
 981         overload for input iterators.
 982         (move_iterator): Add constraints to comparison operators for C++20.
 983         Define operator<=> for C++20.
 984         * testsuite/24_iterators/move_iterator/input_iterator.cc: New test.
 985         * testsuite/24_iterators/move_iterator/move_only.cc: New test.
 986         * testsuite/24_iterators/move_iterator/rel_ops_c++20.cc: New test.
 987         * testsuite/24_iterators/reverse_iterator/rel_ops_c++20.cc: New test.
 988
 989         * include/bits/iterator_concepts.h (__detail::__decay_copy)
 990         (__detail::__member_begin, __detail::__adl_begin): Move here from
 991         <bits/range_access.h>.
 992         (__detail::__ranges_begin, __detail::__range_iter_t): Define.
 993         * bits/range_access.h (__cust_access::__decay_copy)
 994         (__cust_access::__member_begin, __cust_access::__adl_begin): Move to
 995         <bits/iterator_concepts.h>.
 996         (ranges::iterator_t): Use __detail::__range_iter_t.
 997         * include/bits/stl_iterator.h (back_insert_iterator): Simplify
 998         conditional compilation. Add _GLIBCXX20_CONSTEXPR to all members.
 999         (front_insert_iterator): Likewise.
1000         (insert_iterator): Implement changes from P0896R4 for C++20.
1001         * testsuite/24_iterators/back_insert_iterator/constexpr.cc: New test.
1002         * testsuite/24_iterators/front_insert_iterator/constexpr.cc: New test.
1003         * testsuite/24_iterators/headers/iterator/synopsis_c++17.cc: Adjust
1004         for inclusion in synopsis_c++20.cc which expects different signatures
1005         for some function templates.
1006         * testsuite/24_iterators/insert_iterator/constexpr.cc: New test.
1007
1008         * include/std/type_traits (__is_array_convertible): Move definition
1009         to immediately after is_convertible.
1010
1011 2020-03-26  Jonathan Wakely  <jwakely@redhat.com>
1012
1013         * include/std/chrono (chrono::days, chrono::weeks, chrono::years)
1014         (chrono::months, chrono::sys_days, chrono::local_t)
1015         (chrono::local_time, chrono::local_seconds, chrono::local_days):
1016         Define for C++20.
1017         (chrono::time_point): Add missing static assert.
1018         * testsuite/20_util/time_point/requirements/duration_neg.cc: New test.
1019         * testsuite/std/time/clock/file/overview.cc: New test.
1020         * testsuite/std/time/clock/file/members.cc: New test.
1021         * testsuite/std/time/syn_c++20.cc: New test.
1022
1023 2020-03-25  Mike Crowe  <mac@mcrowe.com>
1024
1025         * testsuite/30_threads/shared_timed_mutex/try_lock_until/1.cc: New
1026         test.
1027         * testsuite/30_threads/shared_timed_mutex/try_lock_until/2.cc: New
1028         test.
1029
1030 2020-03-25  Jonathan Wakely  <jwakely@redhat.com>
1031
1032         * include/bits/fs_fwd.h (filesystem::__file_clock): Move to ...
1033         * include/std/chrono (filesystem::__file_clock): Here.
1034         (filesystem::__file_clock::from_sys, filesystem::__file_clock::to_sys):
1035         Define public member functions for C++20.
1036         (is_clock, is_clock_v): Define traits for C++20.
1037         * include/std/condition_variable (condition_variable::wait_until): Add
1038         check for valid clock.
1039         * include/std/future (_State_baseV2::wait_until): Likewise.
1040         * include/std/mutex (__timed_mutex_impl::_M_try_lock_until): Likewise.
1041         * include/std/shared_mutex (shared_timed_mutex::try_lock_shared_until):
1042         Likewise.
1043         * include/std/thread (this_thread::sleep_until): Likewise.
1044         * testsuite/30_threads/condition_variable/members/2.cc: Qualify
1045         slow_clock with new namespace.
1046         * testsuite/30_threads/condition_variable/members/clock_neg.cc: New
1047         test.
1048         * testsuite/30_threads/condition_variable_any/members/clock_neg.cc:
1049         New test.
1050         * testsuite/30_threads/future/members/clock_neg.cc: New test.
1051         * testsuite/30_threads/recursive_timed_mutex/try_lock_until/3.cc:
1052         Qualify slow_clock with new namespace.
1053         * testsuite/30_threads/recursive_timed_mutex/try_lock_until/
1054         clock_neg.cc: New test.
1055         * testsuite/30_threads/shared_future/members/clock_neg.cc: New
1056         test.
1057         * testsuite/30_threads/shared_lock/locking/clock_neg.cc: New test.
1058         * testsuite/30_threads/shared_timed_mutex/try_lock_until/clock_neg.cc:
1059         New test.
1060         * testsuite/30_threads/timed_mutex/try_lock_until/3.cc: Qualify
1061         slow_clock with new namespace.
1062         * testsuite/30_threads/timed_mutex/try_lock_until/4.cc: Likewise.
1063         * testsuite/30_threads/timed_mutex/try_lock_until/clock_neg.cc: New
1064         test.
1065         * testsuite/30_threads/unique_lock/locking/clock_neg.cc: New test.
1066         * testsuite/std/time/traits/is_clock.cc: New test.
1067         * testsuite/util/slow_clock.h (slow_clock): Move to __gnu_test
1068         namespace.
1069
1070 2020-03-21  Jonathan Wakely  <jwakely@redhat.com>
1071
1072         PR libstdc++/93245
1073         * include/experimental/bits/fs_path.h (path::generic_string<C,T,A>()):
1074         * testsuite/experimental/filesystem/path/generic/generic_string.cc:
1075         Improve test coverage.
1076
1077         PR libstdc++/94242
1078         * include/bits/fs_path.h (path::_S_str_convert): Replace first
1079         parameter with basic_string_view so that strings with different
1080         allocators can be accepted.
1081         (path::generic_string<C,T,A>()): Use basic_string object that uses the
1082         right allocator type.
1083         * testsuite/27_io/filesystem/path/generic/94242.cc: New test.
1084         * testsuite/27_io/filesystem/path/generic/generic_string.cc: Improve
1085         test coverage.
1086
1087 2020-03-18  Jonathan Wakely  <jwakely@redhat.com>
1088
1089         PR libstdc++/94033
1090         * include/std/type_traits (__is_nt_default_constructible_atom): Remove.
1091         (__is_nt_default_constructible_impl): Remove.
1092         (__is_nothrow_default_constructible_impl): Remove.
1093         (__is_nt_constructible_impl): Add bool template parameter. Adjust
1094         partial specializations.
1095         (__is_nothrow_constructible_impl): Replace class template with alias
1096         template.
1097         (is_nothrow_default_constructible): Derive from alias template
1098         __is_nothrow_constructible_impl instead of
1099         __is_nothrow_default_constructible_impl.
1100         * testsuite/20_util/is_nothrow_constructible/94003.cc: New test.
1101
1102         * include/std/stop_token (stop_token::_Stop_state_ref): Define
1103         comparison operators explicitly if the compiler won't synthesize them.
1104
1105         * include/bits/stl_algobase.h (__lexicographical_compare_aux): Check
1106         __cpp_lib_concepts before using iter_reference_t.
1107         * include/bits/stream_iterator.h (istream_iterator): Check
1108         __cpp_lib_concepts before using default_sentinel_t.
1109         * include/bits/streambuf_iterator.h (istreambuf_iterator): Likewise.
1110
1111         PR libstdc++/94203
1112         * include/experimental/executor (executor::executor(Executor)): Call
1113         make_shared directly instead of _M_create. Create _Tgt1 object.
1114         (executor::executor(allocator_arg_t, const ProtoAlloc&, Executor)):
1115         Call allocate_shared directly instead of _M_create. Create _Tgt2
1116         object.
1117         (executor::target_type): Add cast needed for new _Tgt interface.
1118         (executor::target): Define when RTTI is disabled. Use _Tgt::_M_func.
1119         (executor::_Tgt): Define the same interface whether RTTI is enabled or
1120         not.
1121         (executor::_Tgt::target_type, executor::_Tgt::target): Do not use
1122         std::type_info in the interface.
1123         (executor::_Tgt::_M_func): Add data member.
1124         (executor::_TgtImpl): Replace with _Tgt1 and _Tgt2 class templates.
1125         (executor::_Tgt1::_S_func): Define function to access target without
1126         depending on RTTI.
1127         (executor::_M_create): Remove.
1128         (operator==, operator!=): Simplify comparisons for executor.
1129         * include/experimental/socket (is_error_code_enum<socket_errc>):
1130         Define specialization before use.
1131         * testsuite/experimental/net/executor/1.cc: New test.
1132
1133 2020-03-16  Jonathan Wakely  <jwakely@redhat.com>
1134
1135         PR libstdc++/94199
1136         * include/experimental/executor (service_already_exists): Add default
1137         constructor. Declare make_service to be a friend.
1138         * testsuite/experimental/net/execution_context/make_service.cc: New
1139         test.
1140
1141 2020-03-12  Jonathan Wakely  <jwakely@redhat.com>
1142
1143         * testsuite/tr1/8_c_compatibility/cstdlib/functions.cc: Do not pass
1144         a null pointer to functions with nonnull(1) attribute.
1145
1146 2020-03-11  Patrick Palka  <ppalka@redhat.com>
1147
1148         * include/std/ranges (split_view::_OuterIter::_OuterIter): Typo fix,
1149         'address' -> 'std::__addressof'.
1150         * testsuite/std/ranges/adaptors/split.cc: Test taking the split_view of
1151         a non-forward input_range.
1152         * testsuite/util/testsuite_iterators.h (output_iterator_wrapper): Make
1153         default constructor protected instead of deleted, like with
1154         input_iterator_wrapper.
1155         (test_range::iterator): Add comment explaining that this type is used
1156         only when the underlying wrapper is input_iterator_wrapper or
1157         output_iterator_wrapper.  Remove delegating defaulted constructor so
1158         that the inherited default constructor is used instead.
1159
1160         LWG 3286 ranges::size is not required to be valid after a call to
1161         ranges::begin on an input range
1162         * include/std/ranges (subrange::subrange): Split single-argument
1163         constructor into two, one constrained by _S_store_size and another by
1164         !_S_store_size.
1165         (take_view::begin): Call size() before calling ranges::begin(_M_base).
1166         * testsuite/std/ranges/adaptors/lwg3286.cc: New test.
1167         * testsuite/std/ranges/subrange/lwg3286.cc: New test.
1168
1169 2020-03-10  Jonathan Wakely  <jwakely@redhat.com>
1170
1171         * include/std/ranges (split_view::_OuterIter::__at_end): Use __current
1172         instead of _M_current.
1173         (split_view::_OuterIter::operator++): Likewise.
1174
1175         * include/std/ranges (transform_view::_Iterator::__iter_move): Remove.
1176         (transform_view::_Iterator::operator*): Add noexcept-specifier.
1177         (transform_view::_Iterator::iter_move): Inline __iter_move body here.
1178         (split_view::_OuterIter::__current): Add noexcept.
1179         (split_view::_InnerIter::__iter_swap): Remove.
1180         (split_view::_InnerIter::__iter_move): Remove.
1181         (split_view::_InnerIter::_M_i_current): New accessors.
1182         (split_view::_InnerIter::__at_end): Use _M_i_current().
1183         (split_view::_InnerIter::operator*): Likewise.
1184         (split_view::_InnerIter::operator++): Likewise.
1185         (iter_move(const _InnerIter&)): Likewise.
1186         (iter_swap(const _InnerIter&, const _InnerIter&)): Likewise.
1187         * testsuite/std/ranges/adaptors/split.cc: Check noexcept-specifier
1188         for iter_move and iter_swap on split_view's inner iterator.
1189
1190         PR c++/94117
1191         * include/std/ranges (ranges::transform_view::_Iterator::iter_move):
1192         Change expression in noexcept-specifier to match function body.
1193
1194         * testsuite/23_containers/unordered_set/allocator/ext_ptr.cc: Add
1195         comment explaining multiple dg-do directives.
1196         * testsuite/24_iterators/ostream_iterator/1.cc: Fix do-do directive
1197         so test is run as well as compiled.
1198
1199 2020-03-09  Jonathan Wakely  <jwakely@redhat.com>
1200
1201         PR libstdc++/94063
1202         * src/c++17/fs_path.cc (path::operator+=(const path&)): Add kluge to
1203         handle concatenations that change the type of the first component.
1204         (path::operator+=(basic_string_view<value_type>)): Likewise.
1205         * testsuite/27_io/filesystem/path/concat/94063.cc: New test.
1206
1207 2020-03-06  Patrick Palka  <ppalka@redhat.com>
1208
1209         * include/std/ranges (join_view::_Sentinel<_Const>): Befriend
1210         join_view::_Sentinel<!_Const>.
1211         * testsuite/std/ranges/adaptors/join.cc: Augment test.
1212
1213         PR libstdc++/93978
1214         * include/bits/range_access.h (__cust_access::_Empty::operator()):
1215         Declare return type to be bool instead of auto.
1216         * testsuite/std/ranges/adaptors/93978.cc: New test.
1217
1218 2020-03-06  Jonathan Wakely  <jwakely@redhat.com>
1219
1220         PR libstdc++/94069
1221         * include/std/shared_mutex [!PTHREAD_RWLOCK_INITIALIZER]
1222         (__shared_mutex_pthread::__shared_mutex_pthread()): Remove incorrect
1223         second argument to __glibcxx_rwlock_init.
1224         * testsuite/30_threads/shared_timed_mutex/94069.cc: New test.
1225
1226         PR libstdc++/93244
1227         * testsuite/27_io/filesystem/path/generic/generic_string.cc: Adjust
1228         test to not fail due to PR 94063.
1229         * testsuite/27_io/filesystem/path/generic/utf.cc: Likewise.
1230         * testsuite/27_io/filesystem/path/generic/wchar_t.cc: Likewise.
1231
1232 2020-03-06  Andreas Krebbel  <krebbel@linux.ibm.com>
1233
1234         * src/c++11/system_error.cc: Omit the ENOTSUP case statement if it
1235         would match ENOSYS.
1236
1237 2020-03-05  Jonathan Wakely  <jwakely@redhat.com>
1238
1239         * testsuite/27_io/filesystem/operations/all.cc: Mark unused variable.
1240         * testsuite/27_io/filesystem/operations/copy.cc: Fix typo.
1241         * testsuite/experimental/filesystem/operations/copy.cc: Likewise.
1242         * testsuite/27_io/filesystem/operations/file_size.cc: Use correct type
1243         for return value, and in comparison.
1244         * testsuite/experimental/filesystem/operations/file_size.cc: Likewise.
1245
1246         PR libstdc++/94051
1247         * include/std/string_view: Include <bits/ostream_insert.h>.
1248         * testsuite/21_strings/basic_string_view/inserters/94051.cc: New test.
1249
1250 2020-03-04  Jonathan Wakely  <jwakely@redhat.com>
1251
1252         * include/bits/cpp_type_traits.h (__memcpyable): Fix comment.
1253
1254 2020-03-04  Patrick Palka  <ppalka@redhat.com>
1255
1256         PR libstdc++/94017
1257         * include/bits/ranges_algobase.h (__fill_n_fn::operator()): Refine
1258         condition for when to use memset, making sure to additionally check that
1259         the output pointer's value type is a non-volatile byte type.  Instead of
1260         requiring that the fill type is a byte type, just require that it's an
1261         integral type.
1262         * testsuite/20_util/specialized_algorithms/uninitialized_fill/94017.cc:
1263         New test.
1264         * testsuite/20_util/specialized_algorithms/uninitialized_fill_n/94017.cc:
1265         New test.
1266         * testsuite/25_algorithms/fill/94013.cc: Uncomment part of test that was
1267         blocked by PR 94017.
1268         * testsuite/25_algorithms/fill/94017.cc: New test.
1269         * testsuite/25_algorithms/fill_n/94017.cc: New test.
1270
1271         LWG 3355 The memory algorithms should support move-only input iterators
1272         introduced by P1207
1273         * include/bits/ranges_uninitialized.h
1274         (__uninitialized_copy_fn::operator()): Use std::move to avoid attempting
1275         to copy __ifirst, which could be a move-only input iterator.  Use
1276         operator- instead of ranges::distance to compute distance from a sized
1277         sentinel.
1278         (__uninitialized_copy_n_fn::operator()): Likewise.
1279         (__uninitialized_move_fn::operator()): Likewise.
1280         (__uninitialized_move_n_fn::operator()): Likewise.
1281         (__uninitialized_destroy_fn::operator()): Use std::move to avoid
1282         attempting to copy __first.
1283         (__uninitialized_destroy_n_fn::operator()): Likewise.
1284         * testsuite/20_util/specialized_algorithms/destroy/constrained.cc:
1285         Augment test.
1286         * .../specialized_algorithms/uninitialized_copy/constrained.cc:
1287         Likewise.
1288         * .../specialized_algorithms/uninitialized_move/constrained.cc:
1289         Likewise.
1290
1291         * testsuite/util/testsuite_iterators.h (test_range::get_iterator): Make
1292         protected instead of private.
1293         (test_sized_range_sized_sent): New.
1294
1295         * testsuite/util/testsuite_iterators.h (input_iterator_wrapper_nocopy):
1296         New testsuite iterator.
1297         * testsuite/24_iterators/counted_iterator/lwg3389.cc: use it.
1298         * testsuite/24_iterators/move_iterator/lwg3390.cc: Likewise.
1299
1300         * include/bits/ranges_uninitialized.h
1301         (uninitialized_copy_fn::operator()): Pass a reference type as the first
1302         argument to is_nothrow_assignable_v.
1303         (uninitialized_copy_fn::operator()): Likewise.
1304         (uninitialized_move_fn::operator()): Likewise.  Return an in_out_result
1305         with the input iterator stripped of its move_iterator.
1306         (uninitialized_move_n_fn::operator()): Likewise.
1307         (uninitialized_fill_fn::operator()): Pass a reference type as the first
1308         argument to is_nothrow_assignable_v.
1309         (uninitialized_fill_n_fn::operator()): Likewise.
1310
1311 2020-03-03  Jonathan Wakely  <jwakely@redhat.com>
1312
1313         PR libstdc++/94013
1314         * include/bits/cpp_type_traits.h (__memcpyable, __memcmpable): New
1315         traits to control when to use memmove and memcmp optimizations.
1316         (__is_nonvolatile_trivially_copyable): New helper trait.
1317         * include/bits/ranges_algo.h (__lexicographical_compare_fn): Do not
1318         use memcmp optimization with volatile data.
1319         * include/bits/ranges_algobase.h (__equal_fn): Use __memcmpable.
1320         (__copy_or_move, __copy_or_move_backward): Use __memcpyable.
1321         * include/bits/stl_algobase.h (__copy_move_a2): Use __memcpyable.
1322         (__copy_move_backward_a2): Likewise.
1323         (__equal_aux1): Use __memcmpable.
1324         (__lexicographical_compare_aux): Do not use memcmp optimization with
1325         volatile data.
1326         * testsuite/25_algorithms/copy/94013.cc: New test.
1327         * testsuite/25_algorithms/copy_backward/94013.cc: New test.
1328         * testsuite/25_algorithms/equal/94013.cc: New test.
1329         * testsuite/25_algorithms/fill/94013.cc: New test.
1330         * testsuite/25_algorithms/lexicographical_compare/94013.cc: New test.
1331         * testsuite/25_algorithms/move/94013.cc: New test.
1332         * testsuite/25_algorithms/move_backward/94013.cc: New test.
1333
1334         * include/bits/stl_algobase.h (lexicographical_compare_three_way):
1335         Avoid redundant iterator comparisons (LWG 3410).
1336
1337 2020-03-02  Jonathan Wakely  <jwakely@redhat.com>
1338
1339         PR libstdc++/93972
1340         * include/bits/stl_algobase.h (__memcmp): Allow pointer types to
1341         differ.
1342         * testsuite/25_algorithms/lexicographical_compare/uchar.cc: New test.
1343
1344         * include/std/ranges (__detail::__maybe_empty_t): Rename to
1345         __maybe_present_t.
1346         (__adaptor::_RangeAdaptor, join_view, split_view): Use new name.
1347
1348         * include/bits/ranges_algo.h (shift_right): Add 'typename' to
1349         dependent type.
1350
1351 2020-03-01  H.J. Lu  <hongjiu.lu@intel.com>
1352
1353         * config/abi/post/x86_64-linux-gnu/x32/baseline_symbols.txt: Updated.
1354
1355 2020-02-29  John David Anglin  <danglin@gcc.gnu.org>
1356
1357         * testsuite/17_intro/headers/c++1998/charset.cc: Skip on *-*-hpux*.
1358         * testsuite/17_intro/headers/c++2011/charset.cc: Likewise.
1359         * testsuite/17_intro/headers/c++2014/charset.cc: Likewise.
1360         * testsuite/17_intro/headers/c++2017/charset.cc: Likewise.
1361         * testsuite/17_intro/headers/c++2020/charset.cc: Likewise.
1362
1363         * testsuite/30_threads/condition_variable_any/stop_token/wait_on.cc:
1364         Add libatomic option.
1365         * testsuite/30_threads/jthread/jthread.cc: Likewise.
1366
1367 2020-02-29  François Dumont  <fdumont@gcc.gnu.org>
1368
1369         * include/bits/stl_algo.h
1370         (__find_if, __count_if, __is_permutation, std::is_permutation): Move...
1371         * include/bits/stl_algobase.h: ...here.
1372         * include/bits/hashtable_policy.h: Remove <bits/stl_algo.h> include.
1373
1374 2020-02-29  John David Anglin  <danglin@gcc.gnu.org>
1375
1376         * testsuite/30_threads/stop_token/stop_callback.cc: Add libatomic
1377         option.
1378         * testsuite/30_threads/stop_token/stop_callback/deadlock-mt.cc:
1379         Likewise.
1380         * testsuite/30_threads/stop_token/stop_callback/deadlock.cc: Likewise.
1381         * testsuite/30_threads/stop_token/stop_callback/destroy.cc: Likewise.
1382         * testsuite/30_threads/stop_token/stop_callback/invoke.cc: Likewise.
1383         * testsuite/30_threads/stop_token/stop_source.cc: Likewise.
1384         * testsuite/30_threads/stop_token/stop_source/assign.cc: Likewise.
1385         * testsuite/30_threads/stop_token/stop_token.cc: Likewise.
1386         * testsuite/30_threads/stop_token/stop_token/stop_possible.cc:
1387         Likewise.
1388
1389         PR libstdc++/92906
1390         * config/abi/post/hppa-linux-gnu/baseline_symbols.txt: Update.
1391
1392 2020-02-28  Patrick Palka  <ppalka@redhat.com>
1393
1394         PR libstdc++/93972
1395         * include/bits/ranges_algo.h (__lexicographical_compare_fn::operator()):
1396         Fix condition for when to use memcmp, making it consistent with the
1397         corresponding condition used in std::lexicographical_compare.
1398         * testsuite/25_algorithms/lexicographical_compare/93972.cc: New test.
1399
1400         * testsuite/26_numerics/headers/numeric/synopsis.cc: Add signatures for
1401         functions introduced in C++11, C++17 and C++2a.  Add 'constexpr' to
1402         existing signatures for C++2a.
1403
1404 2020-02-28  Jonathan Wakely  <jwakely@redhat.com>
1405
1406         * testsuite/24_iterators/range_operations/advance_debug_neg.cc: Run
1407         test instead of just compiling it.
1408
1409 2020-02-28  Patrick Palka  <ppalka@redhat.com>
1410
1411         * include/std/ranges (reverse_view::_S_needs_cached_begin): Set to false
1412         whenever the underlying range models common_range.
1413
1414         * include/std/ranges (__detail::_CachedPosition): New struct.
1415         (views::filter_view::_S_needs_cached_begin): New member variable.
1416         (views::filter_view::_M_cached_begin): New member variable.
1417         (views::filter_view::begin): Use _M_cached_begin to cache its
1418         result.
1419         (views::drop_view::_S_needs_cached_begin): New static member variable.
1420         (views::drop_view::_M_cached_begin): New member variable.
1421         (views::drop_view::begin): Use _M_cached_begin to cache its result
1422         when _S_needs_cached_begin.
1423         (views::drop_while_view::_M_cached_begin): New member variable.
1424         (views::drop_while_view::begin): Use _M_cached_begin to cache its
1425         result.
1426         (views::reverse_view::_S_needs_cached_begin): New static member
1427         variable.
1428         (views::reverse_view::_M_cached_begin): New member variable.
1429         (views::reverse_view::begin): Use _M_cached_begin to cache its result
1430         when _S_needs_cached_begin.
1431         * testsuite/std/ranges/adaptors/drop.cc: Augment test to check that
1432         drop_view::begin caches its result.
1433         * testsuite/std/ranges/adaptors/drop_while.cc: Augment test to check
1434         that drop_while_view::begin caches its result.
1435         * testsuite/std/ranges/adaptors/filter.cc: Augment test to check that
1436         filter_view::begin caches its result.
1437         * testsuite/std/ranges/adaptors/reverse.cc: Augment test to check that
1438         reverse_view::begin caches its result.
1439
1440 2020-02-28  Jonathan Wakely  <jwakely@redhat.com>
1441
1442         * testsuite/27_io/filesystem/operations/last_write_time.cc: Fixes for
1443         filesystems that silently truncate timestamps.
1444         * testsuite/experimental/filesystem/operations/last_write_time.cc:
1445         Likewise.
1446
1447         * testsuite/21_strings/basic_string/cons/char/1.cc: Disable
1448         -Wstringop-overflow warnings.
1449
1450 2020-02-27  Jonathan Wakely  <jwakely@redhat.com>
1451
1452         * testsuite/lib/libstdc++.exp (v3_target_compile): Add
1453         -fdiagnostics-urls=never to options.
1454
1455 2020-02-27  Patrick Palka  <ppalka@redhat.com>
1456
1457         * include/std/ranges (transform_view::_Iterator<_Const>): Befriend
1458         _Iterator<!_Const>.
1459         (transform_view::_Sentinel<_Const>): Befriend _Sentinel<!_Const>.
1460         (take_view::_Sentinel<_Const>): Likewise.
1461         (take_while_view::_Sentinel<_Const>): Likewise.
1462         (split_view::_OuterIter<_Const>): Befriend _OuterIter<!_Const>.
1463         * testsuite/std/ranges/adaptors/split.cc: Augment test.
1464         * testsuite/std/ranges/adaptors/take.cc: Augment test.
1465         * testsuite/std/ranges/adaptors/take_while.cc: Augment test.
1466         * testsuite/std/ranges/adaptors/transform.cc: Augment test.
1467
1468         * testsuite/25_algorithms/copy/constrained.cc: Don't assume that the
1469         base() of a vector<>::iterator is a pointer.
1470         * testsuite/25_algorithms/copy_backward/constrained.cc: Likewise.
1471         * testsuite/25_algorithms/move/constrained.cc: Likewise.
1472         * testsuite/25_algorithms/move_backward/constrained.cc: Likewise.
1473         * testsuite/25_algorithms/inplace_merge/constrained.cc: Use foo.data()
1474         instead of &foo[0].
1475         * testsuite/25_algorithms/partial_sort/constrained.cc: Likewise.
1476         * testsuite/25_algorithms/partial_sort_copy/constrained.cc: Likewise.
1477         * testsuite/25_algorithms/shuffle/constrained.cc: Likewise.
1478         * testsuite/25_algorithms/sort/constrained.cc: Likewise.
1479         * testsuite/25_algorithms/stable_sort/constrained.cc: Likewise.
1480
1481 2020-02-27  Jonathan Wakely  <jwakely@redhat.com>
1482
1483         * include/debug/array (operator<=>): Define for C++20.
1484         * testsuite/23_containers/array/tuple_interface/get_debug_neg.cc:
1485         Adjust dg-error line numbers.
1486         * testsuite/23_containers/array/tuple_interface/
1487         tuple_element_debug_neg.cc: Likewise.
1488
1489         * testsuite/23_containers/span/back_assert_neg.cc: Add #undef before
1490         defining _GLIBCXX_ASSERTIONS.
1491         * testsuite/23_containers/span/first_2_assert_neg.cc: Likewise.
1492         * testsuite/23_containers/span/first_assert_neg.cc: Likewise.
1493         * testsuite/23_containers/span/front_assert_neg.cc: Likewise.
1494         * testsuite/23_containers/span/index_op_assert_neg.cc: Likewise.
1495         * testsuite/23_containers/span/last_2_assert_neg.cc: Likewise.
1496         * testsuite/23_containers/span/last_assert_neg.cc: Likewise.
1497         * testsuite/23_containers/span/subspan_2_assert_neg.cc: Likewise.
1498         * testsuite/23_containers/span/subspan_3_assert_neg.cc: Likewise.
1499         * testsuite/23_containers/span/subspan_4_assert_neg.cc: Likewise.
1500         * testsuite/23_containers/span/subspan_5_assert_neg.cc: Likewise.
1501         * testsuite/23_containers/span/subspan_6_assert_neg.cc: Likewise.
1502         * testsuite/23_containers/span/subspan_assert_neg.cc: Likewise.
1503
1504         * include/debug/string (__gnu_debug::basic_string::insert): Fix for
1505         C++98 where the member function of the base class returns void.
1506
1507         * testsuite/util/testsuite_iterators.h (forward_iterator_wrapper): Add
1508         equality comparisons that support value-initialized iterators.
1509
1510         * include/bits/boost_concept_check.h (__function_requires): Add
1511         _GLIBCXX14_CONSTEXPR.
1512         * testsuite/25_algorithms/min/concept_checks.cc: New test.
1513
1514 2020-02-26  Patrick Palka  <ppalka@redhat.com>
1515
1516         PR libstdc++/93936
1517         * include/std/ranges (split_view::_InnerIter::operator==): Compare
1518         the operands' _M_i rather than their _M_i.current().
1519         * testsuite/std/ranges/adaptors/split.cc: Augment test.
1520
1521         P1645R1 constexpr for <numeric> algorithms
1522         * include/bits/stl_numeric.h (iota, accumulate, inner_product,
1523         partial_sum, adjacent_difference): Make conditionally constexpr for
1524         C++20.
1525         * include/std/numeric (__cpp_lib_constexpr_numeric): Define this feature
1526         test macro.
1527         (reduce, transform_reduce, exclusive_scan, inclusive_scan,
1528         transform_exclusive_scan, transform_inclusive_scan): Make conditionally
1529         constexpr for C++20.
1530         * include/std/version (__cpp_lib_constexpr_numeric): Define.
1531         * testsuite/26_numerics/accumulate/constexpr.cc: New test.
1532         * testsuite/26_numerics/adjacent_difference/constexpr.cc: Likewise.
1533         * testsuite/26_numerics/exclusive_scan/constexpr.cc: Likewise.
1534         * testsuite/26_numerics/inclusive_scan/constexpr.cc: Likewise.
1535         * testsuite/26_numerics/inner_product/constexpr.cc: Likewise.
1536         * testsuite/26_numerics/iota/constexpr.cc: Likewise.
1537         * testsuite/26_numerics/partial_sum/constexpr.cc: Likewise.
1538         * testsuite/26_numerics/reduce/constexpr.cc: Likewise.
1539         * testsuite/26_numerics/transform_exclusive_scan/constexpr.cc: Likewise.
1540         * testsuite/26_numerics/transform_inclusive_scan/constexpr.cc: Likewise.
1541         * testsuite/26_numerics/transform_reduce/constexpr.cc: Likewise.
1542
1543 2020-02-26  Jonathan Wakely  <jwakely@redhat.com>
1544
1545         * include/bits/ranges_algo.h (__lexicographical_compare_fn): Declare
1546         variables in smaller scope and avoid calling ranges::distance when we
1547         know they are pointers. Remove statically-unreachable use of
1548         __builtin_unreachable().
1549         * include/bits/stl_algobase.h (__lexicographical_compare::__lc):
1550         Define inline.
1551
1552         * include/std/ranges (__detail::__maybe_empty_t): Define new helper
1553         alias.
1554         (__detail::__maybe_const_t): Likewise.
1555         (__adaptor::_RangeAdaptor): Use __maybe_empty_t.
1556         (transform_view, take_view, take_while_view, elements_view): Use
1557         __maybe_const_t.
1558         (join_view, split_view): Use both.
1559
1560 2020-02-25  Patrick Palka  <ppalka@redhat.com>
1561
1562         LWG 3397 basic_istream_view::iterator should not provide
1563         iterator_category
1564         * include/std/ranges (basic_istream_view:_Iterator::iterator_category):
1565         Rename to ...
1566         (basic_istream_view:_Iterator::iterator_concept): ... this.
1567         * testsuite/std/ranges/istream_view.cc: Augment test.
1568
1569         LWG 3325 Constrain return type of transformation function for
1570         transform_view
1571         * include/std/ranges (transform_view): Constrain the return type of the
1572         transformation function as per LWG 3325.
1573         * testsuite/std/ranges/adaptors/lwg3325_neg.cc: New test.
1574
1575         LWG 3313 join_view::_Iterator::operator-- is incorrectly constrained
1576         * include/std/ranges (join_view::_Iterator::operator--): Require that
1577         range_reference_t<_Base> models common_range.
1578         * testsuite/std/ranges/adaptors/lwg3313_neg.cc: New test.
1579
1580         LWG 3301 transform_view::_Iterator has incorrect iterator_category
1581         * include/std/ranges (transform_view::_Iterator::_S_iter_cat): Adjust
1582         determination of iterator_category as per LWG 3301.
1583         * testsuite/std/ranges/adaptors/transform.cc: Augment test.
1584
1585         LWG 3292 iota_view is under-constrained
1586         * include/std/ranges (iota_view): Require that _Winc models semiregular
1587           as per LWG 3292.
1588         * testsuite/std/ranges/iota/lwg3292_neg.cc: New test.
1589
1590 2020-02-25  Jonathan Wakely  <jwakely@redhat.com>
1591
1592         * include/bits/ranges_algobase.h (__copy_or_move): Do not use memmove
1593         during constant evaluation. Call __builtin_memmove directly instead of
1594         __memmove.
1595         (__copy_or_move_backward): Likewise.
1596         * include/bits/stl_algobase.h (__memmove): Remove.
1597         (__copy_move<M, true, random_access_iterator_tag>::__copy_m)
1598         (__copy_move_backward<M, true, random_access_iterator_tag>::__copy_m):
1599         Use __builtin_memmove directly instead of __memmove.
1600         (__copy_move_a2): Do not use memmove during constant evaluation.
1601         (__copy_move_backward_a2): Use _IsMove constant to select correct
1602         __copy_move_backward specialization.
1603         * testsuite/25_algorithms/copy_backward/constexpr.cc: Check for copies
1604         begin turned into moves during constant evaluation.
1605
1606         * testsuite/25_algorithms/move_backward/93872.cc: Add test left out of
1607         previous commit.
1608
1609         PR libstdc++/93872
1610         * include/bits/stl_algobase.h (__memmove): Cast away const before
1611         doing move assignment.
1612         * testsuite/25_algorithms/move/93872.cc: New test.
1613         * testsuite/25_algorithms/move_backward/93872.cc: New test.
1614
1615 2020-02-24  Patrick Palka  <ppalka@redhat.com>
1616
1617         PR libstdc++/93884
1618         * include/bits/ranges_algobase.h (__copy_or_move,
1619         __copy_or_move_backward): Don't inspect the iter_value_t of the output
1620         iterator, instead inspect its iterator_traits directly.
1621         * include/bits/stl_iterator.h (back_insert_iterator::container):
1622         Conditionally initialize.
1623         (back_insert_iterator::difference_type): Conditionally define.
1624         (back_insert_iterator::back_insert_iterator): Conditionally define this
1625         default constructor.
1626         (front_insert_iterator::container): Conditionally initialize.
1627         (front_insert_iterator::difference_type): Conditionally define.
1628         (front_insert_iterator::front_insert_iterator): Conditionally define
1629         this default constructor.
1630         * 24_iterators/back_insert_iterator/pr93884.cc: New test.
1631         * 24_iterators/front_insert_iterator/pr93884.cc: New test.
1632
1633         P0769R2 Add shift to <algorithm>
1634         * include/bits/ranges_algo.h (shift_left, shift_right): New.
1635         * testsuite/25_algorithms/shift_left/1.cc: New test.
1636         * testsuite/25_algorithms/shift_right/1.cc: New test.
1637
1638 2020-02-24  Jonathan Wakely  <jwakely@redhat.com>
1639
1640         * include/bits/stream_iterator.h (istream_iterator(default_sentinel_t)):
1641         Make noexcept-specifier conditional.
1642         * testsuite/24_iterators/istream_iterator/cons/sentinel.cc: Check
1643         noexcept-specifier.
1644
1645         * include/bits/stream_iterator.h (istream_iterator(default_sentinel_t)):
1646         Add constructor.
1647         (operator==(istream_iterator, default_sentinel_t)): Add operator.
1648         (ostream_iterator::difference_type): Define to ptrdiff_t for C++20.
1649         * include/bits/streambuf_iterator.h
1650         (istreambuf_iterator(default_sentinel_t)): Add constructor.
1651         (operator==(istreambuf_iterator, default_sentinel_t)): Add operator.
1652         * testsuite/24_iterators/istream_iterator/cons/sentinel.cc:
1653         New test.
1654         * testsuite/24_iterators/istream_iterator/sentinel.cc: New test.
1655         * testsuite/24_iterators/istreambuf_iterator/cons/sentinel.cc:
1656         New test.
1657         * testsuite/24_iterators/istreambuf_iterator/sentinel.cc: New test.
1658
1659         * include/std/ranges (__deep_const_range, __enable_view_impl): Remove.
1660         (ranges::enable_view): Simplify (LWG 3326).
1661         * include/bits/range_access.h (ranges::enable_view): Declare.
1662         * include/bits/regex.h (__enable_view_impl): Remove partial
1663         specialization.
1664         * include/bits/stl_multiset.h (__enable_view_impl): Likewise.
1665         * include/bits/stl_set.h (__enable_view_impl): Likewise.
1666         * include/bits/unordered_set.h (__enable_view_impl): Likewise.
1667         * include/debug/multiset.h (__enable_view_impl): Likewise.
1668         * include/debug/set.h (__enable_view_impl): Likewise.
1669         * include/debug/unordered_set (__enable_view_impl): Likewise.
1670         * include/experimental/string_view (ranges::enable_view): Define
1671         partial specialization.
1672         * include/std/span (ranges::enable_view): Likewise.
1673         * include/std/string_view (ranges::enable_view): Likewise.
1674         * testsuite/std/ranges/view.cc: Check satisfaction of updated concept.
1675
1676 2020-02-21  Jonathan Wakely  <jwakely@redhat.com>
1677
1678         * include/std/optional (operator<=>(optional<T>, optional<U>))
1679         (operator<=>(optional<T>, nullopt), operator<=>(optional<T>, U)):
1680         Define for C++20.
1681         * include/std/tuple (__tuple_cmp): New helper function for <=>.
1682         (operator<=>(tuple<T...>, tuple<U>...)): Define for C++20.
1683         * include/std/variant (operator<=>(variant<T...>, variant<T...>))
1684         (operator<=>(monostate, monostate)): Define for C++20.
1685         * testsuite/20_util/optional/relops/three_way.cc: New test.
1686         * testsuite/20_util/tuple/comparison_operators/three_way.cc: New test.
1687         * testsuite/20_util/variant/89851.cc: Move to ...
1688         * testsuite/20_util/variant/relops/89851.cc: ... here.
1689         * testsuite/20_util/variant/90008.cc: Move to ...
1690         * testsuite/20_util/variant/relops/90008.cc: ... here.
1691         * testsuite/20_util/variant/relops/three_way.cc: New test.
1692
1693 2020-02-20  Patrick Palka  <ppalka@redhat.com>
1694
1695         * include/std/ranges (views::__adaptor::__maybe_refwrap): New utility
1696         function.
1697         (views::__adaptor::_RangeAdaptor::operator()): Add comments.  Use
1698         __maybe_refwrap to capture lvalue references by reference, and then use
1699         unwrap_reference_t to forward the by-reference captures as references.
1700         * testsuite/std/ranges/adaptors/split.cc: Augment test.
1701         * testsuite/std/ranges/adaptors/split_neg.cc: New test.
1702
1703         * include/std/ranges (iota_view): Forward declare _Sentinel.
1704         (iota_view::_Iterator): Befriend _Sentinel.
1705         (iota_view::_Sentinel::_M_equal): New member function.
1706         (iota_view::_Sentinel::operator==): Use it.
1707         (views::_Iota::operator()): Forward __f using the correct type.
1708         * testsuite/std/ranges/access/ssize.cc (test06): Don't call views::iota
1709         with integers of different signedness, to appease iota_view's deduction
1710         guide.
1711         * testsuite/std/ranges/iota/iota_view.cc: Augment test.
1712
1713 2020-02-20  Jonathan Wakely  <jwakely@redhat.com>
1714
1715         * include/bits/range_access.h (ranges::begin): Reject array of
1716         incomplete type.
1717         (ranges::end, ranges::size): Require arrays to be bounded.
1718         (ranges::data): Require lvalue or borrowed_range.
1719         (ranges::iterator_t): Remove constraint.
1720         * testsuite/std/ranges/access/begin.cc: Do not check array of
1721         incomplete type.
1722         * testsuite/std/ranges/access/begin_neg.cc: New test.
1723         * testsuite/std/ranges/access/end_neg.cc: Adjust expected error.
1724         * testsuite/std/ranges/access/size_neg.cc: Adjust expected error.
1725         * testsuite/std/ranges/access/ssize.cc: Do not check array of
1726         incomplete type.
1727
1728         * include/std/system_error (error_category::operator<=>)
1729         (operator<=>(const error_code&, const error_code&))
1730         (operator<=>(const error_condition&, const error_condition&)): Define
1731         for C++20.
1732         * testsuite/19_diagnostics/error_category/operators/less.cc: New test.
1733         * testsuite/19_diagnostics/error_category/operators/three_way.cc: New
1734         test.
1735         * testsuite/19_diagnostics/error_code/operators/equal.cc: Remove
1736         incorrect comment.
1737         * testsuite/19_diagnostics/error_code/operators/less.cc: New test.
1738         * testsuite/19_diagnostics/error_code/operators/not_equal.cc: Remove
1739         incorrect comment.
1740         * testsuite/19_diagnostics/error_code/operators/three_way.cc: New test.
1741         * testsuite/19_diagnostics/error_condition/operators/equal.cc: Remove
1742         incorrect comment.
1743         * testsuite/19_diagnostics/error_condition/operators/less.cc: New test.
1744         * testsuite/19_diagnostics/error_condition/operators/not_equal.cc:
1745         Remove incorrect comment.
1746         * testsuite/19_diagnostics/error_condition/operators/three_way.cc: New
1747         test.
1748
1749         * libsupc++/typeinfo (type_info::operator!=): Remove for C++20.
1750
1751         * include/std/thread (thread::id::operator<=>): Define for C++20.
1752         * testsuite/30_threads/thread/id/70294.cc: Do not take addresses of
1753         functions in namespace std.
1754         * testsuite/30_threads/thread/id/operators_c++20.cc: New test.
1755
1756 2020-02-19  Patrick Palka  <ppalka@redhat.com>
1757
1758         * testsuite/std/ranges/adaptors/split.cc (test03): Don't include the
1759         null terminator of the underlying string as part of the test_range.
1760         (main): Call test03.
1761
1762 2020-02-19  Jonathan Wakely  <jwakely@redhat.com>
1763
1764         * include/bits/stl_iterator.h (common_iterator): Add copyable<I>
1765         requirement (LWG 3385).
1766         * testsuite/24_iterators/headers/iterator/synopsis_c++20.cc: Adjust
1767         expected declaration.
1768
1769         * include/std/ranges (take_while_view, drop_view, drop_while_view)
1770         (elements_view:_Iterator): Initialize data members (LWG 3364).
1771
1772         * libsupc++/compare (three_way_comparable): Remove always-false check
1773         that should have been removed with weak_equality (P1959R0).
1774         (three_way_comparable_with): Likewise. Reorder requirements (LWG 3360).
1775
1776         * include/std/concepts (__detail::__partially_ordered_with): Move here
1777         from <compare>.
1778         (totally_ordered, totally_ordered_with): Use __partially_ordered_with
1779         to simplify definition (LWG 3331).
1780         * libsupc++/compare (__detail::__partially_ordered_with): Move to
1781         <concepts>.
1782
1783         * include/std/concepts (totally_ordered_with): Remove redundant
1784         requirement (LWG 3329).
1785
1786         * include/std/ranges (__detail::__convertible_to_non_slicing): New
1787         helper concept.
1788         (__detail::__pair_like_convertible_to): Remove.
1789         (__detail::__pair_like_convertible_from): Add requirements for
1790         non-slicing conversions.
1791         (subrange): Constrain constructors with __convertible_to_non_slicing.
1792         Remove constructors from pair-like types. Add new deduction guide.
1793         * testsuite/std/ranges/subrange/lwg3282_neg.cc: New test.
1794
1795         * include/bits/iterator_concepts.h (iter_move): Add declaration to
1796         prevent unqualified lookup finding a suitable declaration (LWG 3247).
1797
1798         * include/std/memory_resource (polymorphic_allocator::allocate)
1799         (polymorphic_allocator::allocate_object): Change type of exception to
1800         bad_array_new_length (LWG 3237).
1801         * testsuite/20_util/polymorphic_allocator/lwg3237.cc: New test.
1802
1803         * include/std/type_traits (__cpp_lib_unwrap_ref): Define (LWG 3348).
1804         * include/std/version (__cpp_lib_unwrap_ref): Likewise.
1805         * testsuite/20_util/unwrap_reference/1.cc: Check macro.
1806         * testsuite/20_util/unwrap_reference/3.cc: New test.
1807
1808         * include/std/numeric (midpoint(T8, T*)): Do not check for complete
1809         type during overload resolution, use static assert instead (LWG 3200).
1810         * testsuite/26_numerics/midpoint/pointer.cc: Do not test with
1811         incomplete type.
1812         * testsuite/26_numerics/midpoint/pointer_neg.cc: New test.
1813
1814         * include/std/span (span(T (&)[N])): Use non-deduced context to
1815         prevent first parameter from interfering with class template argument
1816         deduction (LWG 3369).
1817         * testsuite/23_containers/span/deduction.cc: Add missing 'const'.
1818         * testsuite/23_containers/span/lwg3255.cc: Check for construction from
1819         rvalues.
1820
1821         * include/std/span (span::const_iterator, span::const_reverse_iterator)
1822         (span::cbegin(), span::cend(), span::crbegin(), span::crend()):
1823         Remove (LWG 3320).
1824         * testsuite/23_containers/span/everything.cc: Replace uses of cbegin
1825         and cend.
1826         * testsuite/20_util/specialized_algorithms/destroy/constrained.cc:
1827         Likewise.
1828         * testsuite/20_util/specialized_algorithms/uninitialized_copy/
1829         constrained.cc: Likewise.
1830         * testsuite/20_util/specialized_algorithms/
1831         uninitialized_default_construct/constrained.cc: Likewise.
1832         * testsuite/20_util/specialized_algorithms/uninitialized_fill/
1833         constrained.cc: Likewise.
1834         * testsuite/20_util/specialized_algorithms/uninitialized_move/
1835         constrained.cc: Likewise.
1836         * testsuite/20_util/specialized_algorithms/
1837         uninitialized_value_construct/constrained.cc: Likewise.
1838
1839         * include/bits/range_access.h (range_size_t): Define alias template.
1840         * include/std/ranges (all_view): Rename to views::all_t (LWG 3335).
1841         * testsuite/std/ranges/adaptors/filter.cc: Adjust to new name.
1842
1843         * include/std/ranges (filter_view, transform_view, take_view)
1844         (join_view, split_view, reverse_view): Remove commented-out converting
1845         constructors (LWG 3280).
1846
1847         * include/std/memory (uninitialized_construct_using_allocator): Use
1848         std::construct_at (LWG 3321).
1849
1850         * include/std/memory_resource (polymorphic_allocator::allocate_bytes)
1851         (polymorphic_allocator::allocate_object)
1852         (polymorphic_allocator::new_object): Add nodiscard attribute (LWG3304).
1853
1854         LWG 3379. "safe" in several library names is misleading
1855         * include/bits/range_access.h (enable_safe_range): Rename to
1856         enable_borrowed_range.
1857         (__detail::__maybe_safe_range): Rename to __maybe_borrowed_range.
1858         (safe_range): Rename to borrowed_range.
1859         * include/bits/ranges_algo.h: Adjust to use new names.
1860         * include/bits/ranges_algobase.h: Likewise.
1861         * include/bits/ranges_uninitialized.h: Likewise.
1862         * include/std/ranges: Likewise.
1863         (safe_iterator_t): Rename to borrowed_iterator_t.
1864         (safe_subrange_t): Rename to borrowed_subrange_t.
1865         * include/std/span: Adjust to use new names.
1866         * include/std/string_view: Likewise.
1867         * include/experimental/string_view: Likewise.
1868         * testsuite/std/ranges/access/begin.cc: Likewise.
1869         * testsuite/std/ranges/access/cbegin.cc: Likewise.
1870         * testsuite/std/ranges/access/cdata.cc: Likewise.
1871         * testsuite/std/ranges/access/cend.cc: Likewise.
1872         * testsuite/std/ranges/access/crbegin.cc: Likewise.
1873         * testsuite/std/ranges/access/crend.cc: Likewise.
1874         * testsuite/std/ranges/access/data.cc: Likewise.
1875         * testsuite/std/ranges/access/end.cc: Likewise.
1876         * testsuite/std/ranges/access/rbegin.cc: Likewise.
1877         * testsuite/std/ranges/access/rend.cc: Likewise.
1878         * testsuite/std/ranges/safe_range.cc: Likewise.
1879         * testsuite/std/ranges/safe_range_types.cc: Likewise.
1880         * testsuite/util/testsuite_iterators.h: Likewise.
1881
1882         * include/std/ranges (tuple_element<0, const subrange<I, S, K>>)
1883         (tuple_element<1, const subrange<I, S, K>>): Add partial
1884         specializations (LWG 3398).
1885         * testsuite/std/ranges/subrange/tuple_like.cc: New test.
1886
1887         * include/bits/ranges_algo.h (__find_fn, __find_first_of_fn)
1888         (__adjacent_find_fn, __remove_if_fn, __remove_copy_if_fn)
1889         (__unique_fn, __unique_copy_fn): Remove redundant conversions to bool.
1890
1891 2020-02-18  Patrick Palka  <ppalka@redhat.com>
1892
1893         P1983R0 Wording for GB301, US296, US292, US291, and US283
1894         * include/std/ranges (filter_view::pred): New member function.
1895         (join_view::_Iterator::_Iterator): Remove now-redundant comment since
1896         P1983R0 fixes the highlighted issue in the same way.
1897         (join_view::_Iterator<_Const>): Add friend
1898         join_view::_Iterator<!_Const>.
1899         (join_view::_M_inner): Remove mutable specifier, effectively reverting
1900         the proposed wording changes of P3278.
1901         (join_view::begin): Refine the condition for when to return a const
1902         iterator.
1903         (split_view::_OuterIter::_OuterIter): Adjust constraints.
1904         * testsuite/std/ranges/adaptors/filter.cc: Test that filter_view::pred
1905         exists and works.
1906
1907 2020-02-18  Jonathan Wakely  <jwakely@redhat.com>
1908
1909         PR libstdc++/93818
1910         * include/std/ranges (_RangeAdaptor): Add deduction guide.
1911         (filter_view::_Iterator): Add alias _Vp_iter and use in place of
1912         iterator_t<_Vp>.
1913         (filter_view::_Iterator::_S_iter_cat()): Add 'typename'.
1914         (transform_view::_Iterator): Add alias _Base_iter and use in place of
1915         iterator_t<_Base>.
1916         (transform_view::_Iterator::_S_iter_cat()): Add 'typename'.
1917         (join_view::_Iterator): Add _Outer_iter and _Inner_iter aliases.
1918         (join_view::_Iterator::_S_iter_cat()): Add 'typename'.
1919         (split_view::_InnerIter::_S_iter_cat()): Likewise.
1920
1921         * testsuite/20_util/integer_comparisons/equal.cc: Fix invalid
1922         assumption that long is wider than int.
1923         * testsuite/20_util/integer_comparisons/greater_equal.cc: Likewise.
1924         * testsuite/20_util/integer_comparisons/less.cc: Likewise.
1925         * testsuite/20_util/integer_comparisons/less_equal.cc: Likewise.
1926         * testsuite/20_util/integer_comparisons/not_equal.cc: Likewise.
1927
1928         P1976R2 Fixed-size span construction from dynamic range
1929         * include/std/span (__cpp_lib_span): Update value.
1930         (span(It, size_type), span(It, End)): Make conditionally explicit. Add
1931         assertion.
1932         (span(R&&), span(const span<OType, OExtent>&)): Likewise and relax
1933         constraints.
1934         (span::first<Count>(), span::last<Count>()): Use explicit type in
1935         return statement.
1936         (as_bytes, as_writable_bytes): Likewise.
1937         * include/std/version (__cpp_lib_span): Update value.
1938         * testsuite/23_containers/span/1.cc: Check new value.
1939         * testsuite/23_containers/span/2.cc: Check new value.
1940         * testsuite/23_containers/span/explicit.cc: New test.
1941
1942         * include/std/span (span::__is_compatible_array): Simplify alias
1943         template by using requires-clause.
1944         (span::__is_compatible_ref): New alias template for constraining
1945         constructors.
1946         (span::__is_compatible_iterator, span::__is_compatible_range): Remove.
1947         (span(It, size_type), span(It, End)): Use __is_compatible_ref.
1948         (span(T(&)[N], span(array<T, N>&), span(const array<T, N>&)): Remove
1949         redundant parentheses.
1950         (span(R&&)): Add missing constraints.
1951
1952         * include/std/span (span): Reorder members and rename template
1953         parameters to match declarations in the C++2a working paper.
1954
1955         P2116R0 Remove tuple-like protocol support from fixed-extent span
1956         * include/std/span (get, tuple_size, tuple_element): Remove.
1957         * testsuite/23_containers/span/everything.cc: Remove checks for
1958         tuple-like API.
1959         * testsuite/23_containers/span/get_neg.cc: Remove.
1960         * testsuite/23_containers/span/tuple_element_dynamic_neg.cc: Remove.
1961         * testsuite/23_containers/span/tuple_element_oob_neg.cc: Remove.
1962         * testsuite/23_containers/span/tuple_size_neg.cc: Remove.
1963
1964 2020-02-17  Patrick Palka  <ppalka@redhat.com>
1965
1966         P2106R0 Alternative wording for GB315 and GB316
1967         * include/bits/ranges_algo.h (in_fun_result): New.
1968         (for_each_result, for_each_n_result): Change into an alias of
1969         in_fun_result.
1970         (in_in_result): New.
1971         (mismatch_result): Change into an alias of in_in_result.
1972         (copy_if_result): Change into an alias of in_out_result.
1973         (swap_ranges_result): Change into an alias of in_in_result.
1974         (unary_transform_result): Change into an alias of in_out_result.
1975         (in_in_out_result): New.
1976         (binary_transform_result): Change into an alias of in_in_out_result.
1977         (replace_copy_result, replace_copy_if_result, remove_copy_if_result,
1978         remove_copy_result, unique_copy_result, reverse_copy_result,
1979         rotate_copy_result, partial_sort_copy_result): Change into an alias of
1980         in_out_result.
1981         (in_out_out_result): New.
1982         (partition_copy_result, merge_result): Change into an alias of
1983         in_out_out_result.
1984         (set_union_result, set_intersection_result): Change into an alias of
1985         in_in_out_result.
1986         (set_difference_result): Change into an alias of in_out_result.
1987         (set_symmetric_difference): Change into an alias of in_in_out_result.
1988         (min_max_result): New.
1989         (minmax_result, minmax_element_result): Change into an alias of
1990         min_max_result.
1991         (in_found_result): New.
1992         (next_permutation_result, prev_permutation_result): Change into an alias
1993         of in_found_result.
1994         (__next_permutation_fn::operator(), __prev_permutation_fn::operator()):
1995         Adjust following changes to next_permutation_result and
1996         prev_permutation_result.
1997         * include/bits/ranges_algobase.h (in_out_result): New.
1998         (copy_result, move_result, move_backward_result, copy_backward_result,
1999         copy_n_result): Change into an alias of in_out_result.
2000         * include/bits/ranges_uninitialized.h (uninitialized_copy_result,
2001         uninitialized_copy_n_result, uninitialized_move_result,
2002         uninitialized_move_n_result): Likewise.
2003         * testsuite/25_algorithms/next_permutation/constrained.cc: Adjust uses of
2004         structured bindings.
2005         * testsuite/25_algorithms/prev_permutation/constrained.cc: Likewise.
2006
2007         P1243R4 Rangify new algorithms
2008         * include/bits/ranges_algo.h (for_each_n_result, __for_each_n_fn,
2009         for_each_n, __sample_fn, sample, __clamp_fn, clamp): New.
2010         * testsuite/25_algorithms/clamp/constrained.cc: New test.
2011         * testsuite/25_algorithms/for_each/constrained.cc: Augment test.
2012         * testsuite/25_algorithms/sample/constrained.cc: New test.
2013
2014 2020-02-17  Jonathan Wakely  <jwakely@redhat.com>
2015
2016         P1964R2 Wording for boolean-testable
2017         * include/bits/ranges_algo.h (__find_fn, __find_first_of_fn)
2018         (__adjacent_find_fn): Cast result of predicate to bool.
2019         * include/std/concepts (__boolean): Remove.
2020         (__detail::__boolean_testable_impl, __detail::__boolean_testable): Add
2021         new helper concepts.
2022         (__detail::__weakly_eq_cmp_with, totally_ordered, totally_ordered_with)
2023         (predicate): Use __boolean_testable instead of boolean.
2024         * libsupc++/compare (__detail::__partially_ordered, _Synth3way):
2025         Likewise.
2026
2027         P1970R2 Consistency for size() functions: Add ranges::ssize
2028         * include/bits/range_access.h (_SSize, ssize): Define for C++20.
2029         * testsuite/std/ranges/access/ssize.cc: New test.
2030
2031         P1956R1 On the names of low-level bit manipulation functions
2032         * include/bits/hashtable_policy.h: Update comment.
2033         * include/std/bit (__ispow2, __ceil2, __floor2, __log2p1): Rename.
2034         (ispow2, ceil2, floor2, log2p1): Likewise.
2035         (__cpp_lib_int_pow2): Add feature test macro.
2036         * include/std/charconv (__to_chars_len_2): Adjust use of __log2p1.
2037         * include/std/memory (assume_aligned): Adjust use of ispow2.
2038         * include/std/version (__cpp_lib_int_pow2): Add.
2039         * libsupc++/new_opa.cc: Adjust use of __ispow2.
2040         * src/c++17/memory_resource.cc: Likewise, and for __ceil2 and __log2p1.
2041         * testsuite/17_intro/freestanding.cc: Adjust use of ispow2.
2042         * testsuite/26_numerics/bit/bit.pow.two/ceil2.cc: Rename to ...
2043         * testsuite/26_numerics/bit/bit.pow.two/bit_ceil.cc: ... here.
2044         * testsuite/26_numerics/bit/bit.pow.two/ceil2_neg.cc: Rename to ...
2045         * testsuite/26_numerics/bit/bit.pow.two/bit_ceil_neg.cc: ... here.
2046         * testsuite/26_numerics/bit/bit.pow.two/floor2.cc: Rename to ...
2047         * testsuite/26_numerics/bit/bit.pow.two/bit_floor.cc: ... here.
2048         * testsuite/26_numerics/bit/bit.pow.two/log2p1.cc: Rename to ...
2049         * testsuite/26_numerics/bit/bit.pow.two/bit_width.cc: ... here.
2050         * testsuite/26_numerics/bit/bit.pow.two/ispow2.cc: Rename to ...
2051         * testsuite/26_numerics/bit/bit.pow.two/has_single_bit.cc: ... here.
2052
2053         * include/std/charconv: Add comment.
2054
2055         PR libstdc++/92546 (partial)
2056         * include/bits/random.h (uniform_random_bit_generator): Move definition
2057         to <bits/uniform_int_dist.h>.
2058         * include/bits/ranges_algo.h: Include <bits/uniform_int_dist.h> instead
2059         of <bits/random.h>.
2060         * include/bits/ranges_algobase.h: Do not include <cmath>.
2061         * include/bits/uniform_int_dist.h (uniform_random_bit_generator):
2062         Move here.
2063         * include/std/ranges: Do not include <limits>.
2064         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error lineno.
2065
2066         PR libstdc++/92546 (partial)
2067         * include/Makefile.am: Add new header.
2068         * include/Makefile.in: Regenerate.
2069         * include/bits/int_limits.h: New header.
2070         * include/bits/parse_numbers.h (__select_int::_Select_int): Replace
2071         numeric_limits with __detail::__int_limits.
2072         * include/std/bit (__rotl, __rotr, __countl_zero, __countl_one)
2073         (__countr_zero, __countr_one, __popcount, __ceil2, __floor2, __log2p1):
2074         Likewise.
2075         * include/std/charconv (__to_chars_8, __from_chars_binary)
2076         (__from_chars_alpha_to_num, from_chars): Likewise.
2077         * include/std/memory_resource (polymorphic_allocator::allocate)
2078         (polymorphic_allocator::allocate_object): Likewise.
2079         * include/std/string_view (basic_string_view::_S_compare): Likewise.
2080         * include/std/utility (in_range): Likewise.
2081         * testsuite/20_util/integer_comparisons/in_range_neg.cc: Adjust for
2082         extra error about incomplete type __int_limits<bool>.
2083         * testsuite/26_numerics/bit/bit.count/countl_one.cc: Include <limits>.
2084         * testsuite/26_numerics/bit/bit.count/countl_zero.cc: Likewise.
2085         * testsuite/26_numerics/bit/bit.count/countr_one.cc: Likewise.
2086         * testsuite/26_numerics/bit/bit.count/countr_zero.cc: Likewise.
2087         * testsuite/26_numerics/bit/bit.count/popcount.cc: Likewise.
2088         * testsuite/26_numerics/bit/bit.pow.two/ceil2_neg.cc: Likewise.
2089         * testsuite/26_numerics/bit/bit.pow.two/ceil2.cc: Likewise.
2090         * testsuite/26_numerics/bit/bit.pow.two/floor2.cc: Likewise.
2091         * testsuite/26_numerics/bit/bit.pow.two/ispow2.cc: Likewise.
2092         * testsuite/26_numerics/bit/bit.pow.two/log2p1.cc: Likewise.
2093         * testsuite/26_numerics/bit/bit.rotate/rotl.cc: Likewise.
2094         * testsuite/26_numerics/bit/bit.rotate/rotr.cc: Likewise.
2095
2096         * python/libstdcxx/v6/printers.py (StdCmpCatPrinter.to_string): Update
2097         value for partial_ordering::unordered.
2098
2099         * include/bits/iterator_concepts.h (indirectly_copyable_storable): Add
2100         const-qualified expression variations.
2101         * include/std/concepts (copyable): Likewise.
2102
2103         * include/std/type_traits (__is_standard_integer): New helper trait.
2104         * include/std/utility (cmp_equal, cmp_not_equal, cmp_less, cmp_greater)
2105         (cmp_less_equal, cmp_greater_equal, in_range): Define for C++20.
2106         * include/std/version (__cpp_lib_integer_comparison_functions): Define.
2107         * testsuite/20_util/integer_comparisons/1.cc: New test.
2108         * testsuite/20_util/integer_comparisons/2.cc: New test.
2109         * testsuite/20_util/integer_comparisons/equal.cc: New test.
2110         * testsuite/20_util/integer_comparisons/equal_neg.cc: New test.
2111         * testsuite/20_util/integer_comparisons/greater_equal.cc: New test.
2112         * testsuite/20_util/integer_comparisons/greater_equal_neg.cc: New test.
2113         * testsuite/20_util/integer_comparisons/greater_neg.cc: New test.
2114         * testsuite/20_util/integer_comparisons/in_range.cc: New test.
2115         * testsuite/20_util/integer_comparisons/in_range_neg.cc: New test.
2116         * testsuite/20_util/integer_comparisons/less.cc: New test.
2117         * testsuite/20_util/integer_comparisons/less_equal.cc: New test.
2118         * testsuite/20_util/integer_comparisons/less_equal_neg.cc: New test.
2119         * testsuite/20_util/integer_comparisons/less_neg.cc: New test.
2120         * testsuite/20_util/integer_comparisons/not_equal.cc: New test.
2121         * testsuite/20_util/integer_comparisons/not_equal_neg.cc: New test.
2122
2123 2020-02-16  Patrick Palka  <ppalka@redhat.com>
2124
2125         * include/bits/ranges_algo.h (__lexicographical_compare_fn::operator()):
2126         Move code after an early exit constexpr if to under an else branch.
2127         * include/bits/ranges_algobase.h (__equal_fn::operator()): Likewise.
2128
2129 2020-02-15  Patrick Palka  <ppalka@redhat.com>
2130
2131         * include/bits/ranges_algo.h: Adjust whitespace and formatting.
2132         * include/bits/ranges_algobase.h: Likewise.
2133         * include/bits/ranges_uninitialized.h: Likewise.
2134
2135         * include/bits/ranges_algo.h: (adjacent_find, all_of, any_of,
2136         binary_search, copy_if, count, count_if, equal_range, find, find_end,
2137         find_first_of, find_if, find_if_not, for_each, generate, generate_n,
2138         includes, inplace_merge, is_heap, is_heap_until, is_partitioned,
2139         is_permutation, is_sorted, is_sorted_until, lexicographical_compare,
2140         lower_bound, make_heap, max, max_element, merge, min, min_element,
2141         minmax, minmax_element, mismatch, next_permutation, none_of,
2142         nth_element, partial_sort, partial_sort_copy, partition, partition_copy,
2143         partition_point, pop_heap, prev_permutation, push_heap, remove,
2144         remove_copy, remove_copy_if, remove_if, replace, replace_copy,
2145         replace_copy_if, replace_if, reverse, reverse_copy, rotate, rotate_copy,
2146         search, search_n, set_difference, set_intersection,
2147         set_symmetric_difference, set_union, shuffle, sort, sort_heap,
2148         stable_partition, stable_sort, swap_ranges, transform, unique,
2149         unique_copy, upper_bound): Convert into function objects.
2150         * include/bits/ranges_algobase.h: (equal, copy, move, copy_n, fill_n,
2151         fill, move_backward, copy_backward): Likewise.
2152         * include/bits/ranges_uninitialized.h (uninitialized_default_construct,
2153         uninitialized_default_construct_n, uninitialized_value_construct,
2154         uninitialized_value_construct_n, uninitialized_copy,
2155         uninitialized_copy_n, uninitialized_move, uninitialized_move_n,
2156         uninitialized_fill, uninitialized_fill_n, construct_at, destroy_at,
2157         destroy, destroy_n): Likewise.
2158
2159         * include/bits/ranges_algo.h (ranges::__find_end): Fold into ...
2160         (ranges::find_end): ... here.
2161         (ranges::__lexicographical_compare): Fold into ...
2162         (ranges::lexicographical_compare): ... here.
2163         * include/bits/ranges_algobase.h (ranges::__equal): Fold into ...
2164         (ranges::equal): ... here.
2165
2166 2020-02-15  Jonathan Wakely  <jwakely@redhat.com>
2167
2168         * include/bits/erase_if.h (__cpp_lib_erase_if): Define to 202002L.
2169         * include/std/deque: Likewise.
2170         * include/std/forward_list: Likewise.
2171         * include/std/list: Likewise.
2172         * include/std/string: Likewise.
2173         * include/std/vector: Likewise.
2174         * include/std/version: Likewise.
2175         * testsuite/23_containers/deque/erasure.cc: Test for new value.
2176         * testsuite/23_containers/forward_list/erasure.cc: Likewise.
2177         * testsuite/23_containers/list/erasure.cc: Likewise.
2178         * testsuite/23_containers/map/erasure.cc: Likewise.
2179         * testsuite/23_containers/set/erasure.cc: Likewise.
2180         * testsuite/23_containers/unordered_map/erasure.cc: Likewise.
2181         * testsuite/23_containers/unordered_set/erasure.cc: Likewise.
2182         * testsuite/23_containers/vector/erasure.cc: Likewise.
2183
2184 2020-02-15  Jonathan Wakely  <jwakely@redhat.com>
2185
2186         * include/bits/random.h (uniform_random_bit_generator): Require min()
2187         and max() to be constant expressions and min() to be less than max().
2188         * testsuite/26_numerics/random/concept.cc: Check additional cases.
2189         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error lineno.
2190
2191 2020-02-13  Patrick Palka  <ppalka@redhat.com>
2192
2193         * include/Makefile.am: Add <bits/ranges_uninitialized.h>.
2194         * include/Makefile.in: Regenerate.
2195         * include/bits/ranges_uninitialized.h: New header.
2196         * include/std/memory: Include it.
2197         * testsuite/20_util/specialized_algorithms/destroy/constrained.cc: New
2198         test.
2199         * .../uninitialized_copy/constrained.cc: New test.
2200         * .../uninitialized_default_construct/constrained.cc: New test.
2201         * .../uninitialized_fill/constrained.cc: New test.
2202         * .../uninitialized_move/constrained.cc: New test.
2203         * .../uninitialized_value_construct/constrained.cc: New test.
2204
2205         * include/Makefile.am: Add bits/ranges_algobase.h
2206         * include/Makefile.in: Regenerate.
2207         * bits/ranges_algo.h: Include <bits/ranges_algobase.h> and refactor
2208         existing #includes.
2209         (__detail::__is_normal_iterator, __detail::is_reverse_iterator,
2210         __detail::__is_move_iterator, copy_result, move_result,
2211         __equal, equal, copy_result, move_result, move_backward_result,
2212         copy_backward_result, __copy_or_move_backward, __copy_or_move, copy,
2213         move, copy_backward, move_backward, copy_n_result, copy_n, fill_n,
2214         fill): Split out into ...
2215         * bits/range_algobase.h: ... this new header.
2216
2217 2020-02-12  Patrick Palka  <ppalka@redhat.com>
2218
2219         LWG 3389 and LWG 3390
2220         * include/bits/stl_iterator.h (move_move_iterator): Use std::move when
2221         constructing the move_iterator with __i.
2222         (counted_iterator::counted_iterator): Use std::move when initializing
2223         M_current with __i.
2224         * testsuite/24_iterators/counted_iterator/lwg3389.cc: New test.
2225         * testsuite/24_iterators/move_iterator/lwg3390.cc: New test.
2226
2227 2020-02-12  Sandra Loosemore  <sandra@codesourcery.com>
2228
2229         PR libstdc++/79193
2230         PR libstdc++/88999
2231
2232         * configure: Regenerated.
2233
2234 2020-02-12  François Dumont  <fdumont@gcc.gnu.org>
2235
2236         * include/bits/hashtable.h
2237         (_Hashtable<>(_Hashtable&&, std::allocator_type&)): Add
2238         missing std namespace qualification to forward call.
2239
2240 2020-02-09  Jonathan Wakely  <jwakely@redhat.com>
2241
2242         * testsuite/20_util/function_objects/range.cmp/equal_to.cc: Fix
2243         comment.
2244         * testsuite/20_util/function_objects/range.cmp/less.ccL Likewise.
2245
2246         * include/std/ranges: Fix non-ASCII characters in comment.
2247
2248         * include/bits/range_cmp.h (__detail::__eq_builtin_ptr_cmp): Require
2249         equality comparison to be valid and return bool.
2250         (__detail::__less_builtin_ptr_cmp): Likewise for less-than comparison.
2251         * testsuite/20_util/function_objects/range.cmp/equal_to.cc: Check
2252         type with ambiguous conversion to fundamental types.
2253         * testsuite/20_util/function_objects/range.cmp/less.cc: Likewise.
2254
2255 2020-02-07  Jonathan Wakely  <jwakely@redhat.com>
2256
2257         * include/bits/iterator_concepts.h (iter_difference_t, iter_value_t):
2258         Use remove_cvref_t.
2259         (readable_traits): Rename to indirectly_readable_traits.
2260         (readable): Rename to indirectly_readable.
2261         (writable): Rename to indirectly_writable.
2262         (__detail::__iter_exchange_move): Do not use remove_reference_t.
2263         (indirectly_swappable): Adjust requires expression parameter types.
2264         expression.
2265         * include/bits/ranges_algo.h (ranges::transform, ranges::replace)
2266         (ranges::replace_if, ranges::generate_n, ranges::generate)
2267         (ranges::remove): Use new name for writable.
2268         * include/bits/stl_iterator.h (__detail::__common_iter_has_arrow):
2269         Use new name for readable.
2270         * include/ext/pointer.h (readable_traits<_Pointer_adapter<P>>): Use
2271         new name for readable_traits.
2272         * testsuite/24_iterators/associated_types/readable.traits.cc: Likewise.
2273         * testsuite/24_iterators/indirect_callable/projected.cc: Adjust for
2274         new definition of indirectly_readable.
2275
2276         * include/bits/stl_iterator.h (__detail::__common_iter_ptr): Change
2277         to take parameters of common_iterator, instead of the common_iterator
2278         type itself. Fix argument for __common_iter_has_arrow constraint.
2279         (iterator_traits<common_iterator<I, S>>::pointer): Adjust.
2280
2281 2020-02-07  Jonathan Wakely  <jwakely@redhat.com>
2282
2283         * include/std/ranges (iota_view): Add braces to prevent -Wempty-body
2284         warning.
2285         (basic_istream_view::_Iterator::operator++()): Add missing return.
2286
2287 2020-02-07  Patrick Palka  <ppalka@redhat.com>
2288
2289         * include/bits/ranges_algo.h: Remove extraneous &&.
2290
2291         * include/std/ranges (ranges::__detail::__stream_extractable,
2292         ranges::basic_istream_view, ranges::istream_view): Define.
2293         * testsuite/std/ranges/istream_view: New test.
2294
2295         Implement C++20 range adaptors
2296         * include/std/ranges: Include <bits/refwrap.h> and <tuple>.
2297         (subrange::_S_store_size): Mark as const instead of constexpr to
2298         avoid what seems to be a bug in GCC.
2299         (__detail::__box): Give it defaulted copy and move constructors.
2300         (ranges::views::_Single::operator()): Mark constexpr.
2301         (ranges::views::_Iota::operator()): Mark constexpr.
2302         (__detail::Empty): Define.
2303         (ranges::views::__closure::_RangeAdaptor,
2304         ranges::views::__closure::_RangeAdaptorClosure, ref_view, all_view,
2305         ranges::views::all, ranges::__detail::find_if,
2306         ranges::__detail::find_if_not, ranges::__detail::mismatch,
2307         ranges::detail::min, filter_view, ranges::views::filter, transform_view,
2308         ranges::views::transform, take_view, ranges::views::take,
2309         take_while_view, ranges::views::take_while, drop_view,
2310         ranges::views::drop, join_view, ranges::views::join,
2311         __detail::require_constant, __detail::tiny_range, split_view,
2312         ranges::views::split, ranges::views::_Counted, ranges::views::counted,
2313         common_view, ranges::views::common, reverse_view,
2314         ranges::views::reverse,
2315         ranges::views::__detail::__is_reversible_subrange,
2316         ranges::views::__detail::__is_reverse_view, reverse_view,
2317         ranges::views::reverse, __detail::__has_tuple_element, elements_view,
2318         ranges::views::elements, ranges::views::keys, ranges::views::values):
2319         Define.
2320         (views): Alias for ranges::views.
2321         (tuple_size<ranges::subrange<>>, tuple_element<0, ranges::subrange>,
2322         tuple_element<1, ranges::subrange>): New partial specializations.
2323         * testsuite/std/ranges/adaptors/all.cc: New test.
2324         * testsuite/std/ranges/adaptors/common.cc: Likewise.
2325         * testsuite/std/ranges/adaptors/counted.cc: Likewise.
2326         * testsuite/std/ranges/adaptors/drop.cc: Likewise.
2327         * testsuite/std/ranges/adaptors/drop_while.cc: Likewise.
2328         * testsuite/std/ranges/adaptors/elements.cc: Likewise.
2329         * testsuite/std/ranges/adaptors/filter.cc: Likewise.
2330         * testsuite/std/ranges/adaptors/join.cc: Likewise.
2331         * testsuite/std/ranges/adaptors/reverse.cc: Likewise.
2332         * testsuite/std/ranges/adaptors/split.cc: Likewise.
2333         * testsuite/std/ranges/adaptors/take.cc: Likewise.
2334         * testsuite/std/ranges/adaptors/take_while.cc: Likewise.
2335         * testsuite/std/ranges/adaptors/transform.cc: Likewise.
2336
2337 2020-02-07  Jonathan Wakely  <jwakely@redhat.com>
2338
2339         * libsupc++/compare (__cmp_cat::type): Define typedef for underlying
2340         type of enumerations and comparison category types.
2341         (__cmp_cat::_Ord, __cmp_cat::_Ncmp): Add underlying type.
2342         (__cmp_cat::_Ncmp::unordered): Change value to 2.
2343         (partial_ordering::_M_value, weak_ordering::_M_value)
2344         (strong_ordering::_M_value): Change type to __cmp_cat::type.
2345         (partial_ordering::_M_is_ordered): Remove data member.
2346         (partial_ordering): Use second bit of _M_value for unordered. Adjust
2347         comparison operators.
2348         (weak_ordering::operator partial_ordering): Simplify to remove
2349         branches.
2350         (operator<=>(unspecified, weak_ordering)): Likewise.
2351         (strong_ordering::operator partial_ordering): Likewise.
2352         (strong_ordering::operator weak_ordering): Likewise.
2353         (operator<=>(unspecified, strong_ordering)): Likewise.
2354         * testsuite/18_support/comparisons/categories/partialord.cc: New test.
2355         * testsuite/18_support/comparisons/categories/strongord.cc: New test.
2356         * testsuite/18_support/comparisons/categories/weakord.cc: New test.
2357
2358         * include/std/ranges (iota_view::_Iterator): Fix typo in name of
2359         __cpp_lib_three_way_comparison macro and use deduced return type for
2360         operator<=>.
2361         * testsuite/std/ranges/iota/iterator.cc: New test.
2362
2363 2020-02-07  Patrick Palka  <ppalka@redhat.com>
2364             Jonathan Wakely  <jwakely@redhat.com>
2365
2366         Implement C++20 constrained algorithms
2367         * include/Makefile.am: Add new header.
2368         * include/Makefile.in: Regenerate.
2369         * include/std/algorithm: Include <bits/ranges_algo.h>.
2370         * include/bits/ranges_algo.h: New file.
2371         * testsuite/25_algorithms/adjacent_find/constrained.cc: New test.
2372         * testsuite/25_algorithms/all_of/constrained.cc: New test.
2373         * testsuite/25_algorithms/any_of/constrained.cc: New test.
2374         * testsuite/25_algorithms/binary_search/constrained.cc: New test.
2375         * testsuite/25_algorithms/copy/constrained.cc: New test.
2376         * testsuite/25_algorithms/copy_backward/constrained.cc: New test.
2377         * testsuite/25_algorithms/copy_if/constrained.cc: New test.
2378         * testsuite/25_algorithms/copy_n/constrained.cc: New test.
2379         * testsuite/25_algorithms/count/constrained.cc: New test.
2380         * testsuite/25_algorithms/count_if/constrained.cc: New test.
2381         * testsuite/25_algorithms/equal/constrained.cc: New test.
2382         * testsuite/25_algorithms/equal_range/constrained.cc: New test.
2383         * testsuite/25_algorithms/fill/constrained.cc: New test.
2384         * testsuite/25_algorithms/fill_n/constrained.cc: New test.
2385         * testsuite/25_algorithms/find/constrained.cc: New test.
2386         * testsuite/25_algorithms/find_end/constrained.cc: New test.
2387         * testsuite/25_algorithms/find_first_of/constrained.cc: New test.
2388         * testsuite/25_algorithms/find_if/constrained.cc: New test.
2389         * testsuite/25_algorithms/find_if_not/constrained.cc: New test.
2390         * testsuite/25_algorithms/for_each/constrained.cc: New test.
2391         * testsuite/25_algorithms/generate/constrained.cc: New test.
2392         * testsuite/25_algorithms/generate_n/constrained.cc: New test.
2393         * testsuite/25_algorithms/heap/constrained.cc: New test.
2394         * testsuite/25_algorithms/includes/constrained.cc: New test.
2395         * testsuite/25_algorithms/inplace_merge/constrained.cc: New test.
2396         * testsuite/25_algorithms/is_partitioned/constrained.cc: New test.
2397         * testsuite/25_algorithms/is_permutation/constrained.cc: New test.
2398         * testsuite/25_algorithms/is_sorted/constrained.cc: New test.
2399         * testsuite/25_algorithms/is_sorted_until/constrained.cc: New test.
2400         * testsuite/25_algorithms/lexicographical_compare/constrained.cc: New
2401         test.
2402         * testsuite/25_algorithms/lower_bound/constrained.cc: New test.
2403         * testsuite/25_algorithms/max/constrained.cc: New test.
2404         * testsuite/25_algorithms/max_element/constrained.cc: New test.
2405         * testsuite/25_algorithms/merge/constrained.cc: New test.
2406         * testsuite/25_algorithms/min/constrained.cc: New test.
2407         * testsuite/25_algorithms/min_element/constrained.cc: New test.
2408         * testsuite/25_algorithms/minmax/constrained.cc: New test.
2409         * testsuite/25_algorithms/minmax_element/constrained.cc: New test.
2410         * testsuite/25_algorithms/mismatch/constrained.cc: New test.
2411         * testsuite/25_algorithms/move/constrained.cc: New test.
2412         * testsuite/25_algorithms/move_backward/constrained.cc: New test.
2413         * testsuite/25_algorithms/next_permutation/constrained.cc: New test.
2414         * testsuite/25_algorithms/none_of/constrained.cc: New test.
2415         * testsuite/25_algorithms/nth_element/constrained.cc: New test.
2416         * testsuite/25_algorithms/partial_sort/constrained.cc: New test.
2417         * testsuite/25_algorithms/partial_sort_copy/constrained.cc: New test.
2418         * testsuite/25_algorithms/partition/constrained.cc: New test.
2419         * testsuite/25_algorithms/partition_copy/constrained.cc: New test.
2420         * testsuite/25_algorithms/partition_point/constrained.cc: New test.
2421         * testsuite/25_algorithms/prev_permutation/constrained.cc: New test.
2422         * testsuite/25_algorithms/remove/constrained.cc: New test.
2423         * testsuite/25_algorithms/remove_copy/constrained.cc: New test.
2424         * testsuite/25_algorithms/remove_copy_if/constrained.cc: New test.
2425         * testsuite/25_algorithms/remove_if/constrained.cc: New test.
2426         * testsuite/25_algorithms/replace/constrained.cc: New test.
2427         * testsuite/25_algorithms/replace_copy/constrained.cc: New test.
2428         * testsuite/25_algorithms/replace_copy_if/constrained.cc: New test.
2429         * testsuite/25_algorithms/replace_if/constrained.cc: New test.
2430         * testsuite/25_algorithms/reverse/constrained.cc: New test.
2431         * testsuite/25_algorithms/reverse_copy/constrained.cc: New test.
2432         * testsuite/25_algorithms/rotate/constrained.cc: New test.
2433         * testsuite/25_algorithms/rotate_copy/constrained.cc: New test.
2434         * testsuite/25_algorithms/search/constrained.cc: New test.
2435         * testsuite/25_algorithms/search_n/constrained.cc: New test.
2436         * testsuite/25_algorithms/set_difference/constrained.cc: New test.
2437         * testsuite/25_algorithms/set_intersection/constrained.cc: New test.
2438         * testsuite/25_algorithms/set_symmetric_difference/constrained.cc: New
2439         test.
2440         * testsuite/25_algorithms/set_union/constrained.cc: New test.
2441         * testsuite/25_algorithms/shuffle/constrained.cc: New test.
2442         * testsuite/25_algorithms/sort/constrained.cc: New test.
2443         * testsuite/25_algorithms/stable_partition/constrained.cc: New test.
2444         * testsuite/25_algorithms/stable_sort/constrained.cc: New test.
2445         * testsuite/25_algorithms/swap_ranges/constrained.cc: New test.
2446         * testsuite/25_algorithms/transform/constrained.cc: New test.
2447         * testsuite/25_algorithms/unique/constrained.cc: New test.
2448         * testsuite/25_algorithms/unique_copy/constrained.cc: New test.
2449         * testsuite/25_algorithms/upper_bound/constrained.cc: New test.
2450
2451 2020-02-06  Jonathan Wakely  <jwakely@redhat.com>
2452
2453         * include/bits/stl_iterator.h (__detail::__common_iter_ptr): Fix PR
2454         number in comment. Fix indentation.
2455
2456         * include/bits/stl_algobase.h (__iter_swap, __iter_swap<true>): Remove
2457         redundant _GLIBCXX20_CONSTEXPR.
2458
2459         * include/std/ranges (viewable_range): Replace decay_t with
2460         remove_cvref_t (LWG 3375).
2461
2462 2020-02-05  Jonathan Wakely  <jwakely@redhat.com>
2463
2464         * include/bits/iterator_concepts.h (iter_reference_t)
2465         (iter_rvalue_reference_t, iter_common_reference_t, indirect_result_t):
2466         Remove workarounds for PR c++/67704.
2467         * testsuite/24_iterators/aliases.cc: New test.
2468
2469 2020-02-05  Patrick Palka  <ppalka@redhat.com>
2470
2471         * include/bits/stl_iterator.h (move_iterator::move_iterator): Move __i
2472         when initializing _M_current.
2473         (move_iterator::base): Split into two overloads differing in
2474         ref-qualifiers as in P1207R4 for C++20.
2475
2476 2020-02-04  Jonathan Wakely  <jwakely@redhat.com>
2477
2478         * include/std/functional (_GLIBCXX_NOT_FN_CALL_OP): Un-define after
2479         use.
2480
2481         PR libstdc++/93562
2482         * include/bits/unique_ptr.h (__uniq_ptr_impl::swap): Define.
2483         (unique_ptr::swap, unique_ptr<T[], D>::swap): Call it.
2484         * testsuite/20_util/unique_ptr/modifiers/93562.cc: New test.
2485
2486 2020-02-01  Andrew Burgess  <andrew.burgess@embecosm.com>
2487
2488         * configure: Regenerate.
2489
2490 2020-01-31  Patrick Palka  <ppalka@redhat.com>
2491
2492         * testsuite/24_iterators/range_operations/distance.cc: Do not assume
2493         test_range::end() returns the same type as test_range::begin().
2494         * testsuite/24_iterators/range_operations/next.cc: Likewise.
2495         * testsuite/24_iterators/range_operations/prev.cc: Likewise.
2496         * testsuite/util/testsuite_iterators.h (__gnu_test::test_range::end):
2497         Always return a sentinel<I>.
2498
2499 2020-01-29  Jonathan Wakely  <jwakely@redhat.com>
2500
2501         PR libstdc++/92895
2502         * include/std/stop_token (stop_token::stop_possible()): Call new
2503         _M_stop_possible() function.
2504         (stop_token::stop_requested()): Do not use stop_possible().
2505         (stop_token::binary_semaphore): New class, as temporary stand-in for
2506         std::binary_semaphore.
2507         (stop_token::_Stop_cb::_M_callback): Add noexcept to type.
2508         (stop_token::_Stop_cb::_M_destroyed, stop_token::_Stop_cb::_M_done):
2509         New data members for symchronization with stop_callback destruction.
2510         (stop_token::_Stop_cb::_Stop_cb): Make non-template.
2511         (stop_token::_Stop_cb::_M_linked, stop_token::_Stop_cb::_S_execute):
2512         Remove.
2513         (stop_token::_Stop_cb::_M_run): New member function.
2514         (stop_token::_Stop_state::_M_stopped, stop_token::_Stop_state::_M_mtx):
2515         Remove.
2516         (stop_token::_Stop_state::_M_owners): New data member to track
2517         reference count for ownership.
2518         (stop_token::_Stop_state::_M_value): New data member combining a
2519         spinlock, the stop requested flag, and the reference count for
2520         associated stop_source objects.
2521         (stop_token::_Stop_state::_M_requester): New data member for
2522         synchronization with stop_callback destruction.
2523         (stop_token::_Stop_state::_M_stop_possible()): New member function.
2524         (stop_token::_Stop_state::_M_stop_requested()): Inspect relevant bit
2525         of _M_value.
2526         (stop_token::_Stop_state::_M_add_owner)
2527         (stop_token::_Stop_state::_M_release_ownership)
2528         (stop_token::_Stop_state::_M_add_ssrc)
2529         (stop_token::_Stop_state::_M_sub_ssrc): New member functions for
2530         updating reference counts.
2531         (stop_token::_Stop_state::_M_lock, stop_token::_Stop_state::_M_unlock)
2532         (stop_token::_Stop_state::_M_lock, stop_token::_Stop_state::_M_unlock)
2533         (stop_token::_Stop_state::_M_try_lock)
2534         (stop_token::_Stop_state::_M_try_lock_and_stop)
2535         (stop_token::_Stop_state::_M_do_try_lock): New member functions for
2536         managing spinlock.
2537         (stop_token::_Stop_state::_M_request_stop): Use atomic operations to
2538         read and update state. Release lock while running callbacks. Use new
2539         data members to synchronize with callback destruction.
2540         (stop_token::_Stop_state::_M_remove_callback): Likewise.
2541         (stop_token::_Stop_state::_M_register_callback): Use atomic operations
2542         to read and update state.
2543         (stop_token::_Stop_state_ref): Handle type to manage _Stop_state,
2544         replacing shared_ptr.
2545         (stop_source::stop_source(const stop_source&)): Update reference count.
2546         (stop_source::operator=(const stop_source&)): Likewise.
2547         (stop_source::~stop_source()): Likewise.
2548         (stop_source::stop_source(stop_source&&)): Define as defaulted.
2549         (stop_source::operator=(stop_source&&)): Establish postcondition on
2550         parameter.
2551         (stop_callback): Enforce preconditions on template parameter. Replace
2552         base class with data member of new _Cb_impl type.
2553         (stop_callback::stop_callback(const stop_token&, Cb&&))
2554         (stop_callback::stop_callback(stop_token&&, Cb&&)): Fix TOCTTOU race.
2555         (stop_callback::_Cb_impl): New type wrapping _Callback member and
2556         defining the _S_execute member function.
2557         * testsuite/30_threads/stop_token/stop_callback/deadlock-mt.cc: New
2558         test.
2559         * testsuite/30_threads/stop_token/stop_callback/deadlock.cc: New test.
2560         * testsuite/30_threads/stop_token/stop_callback/destroy.cc: New test.
2561         * testsuite/30_threads/stop_token/stop_callback/destructible_neg.cc:
2562         New test.
2563         * testsuite/30_threads/stop_token/stop_callback/invocable_neg.cc: New
2564         test.
2565         * testsuite/30_threads/stop_token/stop_callback/invoke.cc: New test.
2566         * testsuite/30_threads/stop_token/stop_source/assign.cc: New test.
2567         * testsuite/30_threads/stop_token/stop_token/stop_possible.cc: New
2568         test.
2569
2570         * libsupc++/compare (__detail::__3way_builtin_ptr_cmp): Use
2571         three_way_comparable_with.
2572         (__detail::__3way_cmp_with): Remove workaround for fixed bug.
2573         (compare_three_way::operator()): Remove redundant constraint from
2574         requires-clause.
2575         (__detail::_Synth3way::operator()): Use three_way_comparable_with
2576         instead of workaround.
2577         * testsuite/18_support/comparisons/object/93479.cc: Prune extra
2578         output due to simplified constraints on compare_three_way::operator().
2579
2580         PR libstdc++/93479
2581         * libsupc++/compare (__3way_builtin_ptr_cmp): Require <=> to be valid.
2582         * testsuite/18_support/comparisons/object/93479.cc: New test.
2583
2584         * testsuite/std/ranges/access/end.cc: Do not assume test_range::end()
2585         returns the same type as test_range::begin(). Add comments.
2586         * testsuite/std/ranges/access/rbegin.cc: Likewise.
2587         * testsuite/std/ranges/access/rend.cc: Likewise.
2588         * testsuite/std/ranges/range.cc: Do not assume the sentinel for
2589         test_range is the same as its iterator type.
2590         * testsuite/util/testsuite_iterators.h (test_range::sentinel): Add
2591         operator- overloads to satisfy sized_sentinel_for when the iterator
2592         satisfies random_access_iterator.
2593
2594 2020-01-28  Jonathan Wakely  <jwakely@redhat.com>
2595
2596         PR libstdc++/93470
2597         * include/bits/refwrap.h (reference_wrapper::operator()): Restrict
2598         static assertion to object types.
2599
2600         PR libstdc++/93325
2601         * acinclude.m4 (GLIBCXX_ENABLE_LIBSTDCXX_TIME): Use AC_SEARCH_LIBS for
2602         clock_gettime instead of explicit glibc version check.
2603         * configure: Regenerate.
2604
2605 2020-01-28  Martin Liska  <mliska@suse.cz>
2606
2607         PR libstdc++/93478
2608         * include/std/atomic: Fix typo.
2609         * include/std/optional: Likewise.
2610
2611 2020-01-27  Andrew Burgess  <andrew.burgess@embecosm.com>
2612
2613         * configure: Regenerate.
2614
2615 2020-01-27  Jonathan Wakely  <jwakely@redhat.com>
2616
2617         PR libstdc++/93426
2618         * include/std/span (span): Fix deduction guide.
2619         * testsuite/23_containers/span/deduction.cc: New test.
2620
2621 2020-01-24  Jonathan Wakely  <jwakely@redhat.com>
2622
2623         * libsupc++/compare (__cmp_cat::_Eq): Remove enumeration type.
2624         (__cmp_cat::_Ord::equivalent): Add enumerator.
2625         (__cmp_cat::_Ord::_Less, __cmp_cat::_Ord::_Greater): Rename to less
2626         and greater.
2627         (partial_ordering, weak_ordering, strong_ordering): Remove
2628         constructors taking __cmp_cat::_Eq parameters. Use renamed
2629         enumerators.
2630
2631 2020-01-24  Maciej W. Rozycki  <macro@wdc.com>
2632
2633         * acinclude.m4: Handle `--with-toolexeclibdir='.
2634         * Makefile.in: Regenerate.
2635         * aclocal.m4: Regenerate.
2636         * configure: Regenerate.
2637         * doc/Makefile.in: Regenerate.
2638         * include/Makefile.in: Regenerate.
2639         * libsupc++/Makefile.in: Regenerate.
2640         * po/Makefile.in: Regenerate.
2641         * python/Makefile.in: Regenerate.
2642         * src/Makefile.in: Regenerate.
2643         * src/c++11/Makefile.in: Regenerate.
2644         * src/c++17/Makefile.in: Regenerate.
2645         * src/c++98/Makefile.in: Regenerate.
2646         * src/filesystem/Makefile.in: Regenerate.
2647         * testsuite/Makefile.in: Regenerate.
2648
2649 2020-01-23  Alexandre Oliva <oliva@adacore.com>
2650
2651         * crossconfig.m4 (GLIBCXX_CHECK_MATH_DECL): Reject macros.
2652         * configure: Rebuild.
2653
2654         * testsuite/27_io/fpos/mbstate_t/1.cc: Zero-init mbstate_t.
2655
2656 2020-01-23  Jonathan Wakely  <jwakely@redhat.com>
2657
2658         PR libstdc++/91947
2659         * include/Makefile.am (${host_builddir}/largefile-config.h): Simplify
2660         rule.
2661         * include/Makefile.in: Regenerate.
2662
2663 2020-01-20  Jonathan Wakely  <jwakely@redhat.com>
2664
2665         * doc/xml/faq.xml: Fix grammar.
2666         * doc/xml/manual/appendix_contributing.xml: Improve instructions.
2667         * doc/xml/manual/spine.xml: Update copyright years.
2668         * doc/html/*: Regenerate.
2669
2670 2020-01-19  Eric S. Raymond <esr@thyrsus.com>
2671
2672         * doc/xml/faq.xml: Update for SVN -> Git transition.
2673         * doc/xml/manual/appendix_contributing.xml: Likewise.
2674         * doc/xml/manual/status_cxx1998.xml: Likewise.
2675         * doc/xml/manual/status_cxx2011.xml: Likewise.
2676         * doc/xml/manual/status_cxx2014.xml: Likewise.
2677         * doc/xml/manual/status_cxx2017.xml: Likewise.
2678         * doc/xml/manual/status_cxx2020.xml: Likewise.
2679         * doc/xml/manual/status_cxxtr1.xml: Likewise.
2680         * doc/xml/manual/status_cxxtr24733.xml: Likewise.
2681
2682 2020-01-18  Iain Sandoe  <iain@sandoe.co.uk>
2683
2684         * include/Makefile.am: Add coroutine to the std set.
2685         * include/Makefile.in: Regenerated.
2686         * include/std/coroutine: New file.
2687
2688 2020-01-17  Jonathan Wakely  <jwakely@redhat.com>
2689
2690         PR libstdc++/92376
2691         * include/bits/c++config: Only do PSTL config when the header is
2692         present, to fix freestanding.
2693         * libsupc++/new_opa.cc [!_GLIBCXX_HOSTED]: Declare allocation
2694         functions if they were detected by configure.
2695
2696 2020-01-16  Kai-Uwe Eckhardt  <kuehro@gmx.de>
2697             Matthew Bauer  <mjbauer95@gmail.com>
2698             Jonathan Wakely  <jwakely@redhat.com>
2699
2700         PR bootstrap/64271 (partial)
2701         * config/os/bsd/netbsd/ctype_base.h (ctype_base::mask): Change type
2702         to unsigned short.
2703         (ctype_base::alpha, ctype_base::digit, ctype_base::xdigit)
2704         (ctype_base::print, ctype_base::graph, ctype_base::alnum): Sync
2705         definitions with NetBSD upstream.
2706         (ctype_base::blank): Use _CTYPE_BL.
2707         * config/os/bsd/netbsd/ctype_configure_char.cc (_C_ctype_): Remove
2708         Declaration.
2709         (ctype<char>::classic_table): Use _C_ctype_tab_ instead of _C_ctype_.
2710         (ctype<char>::do_toupper, ctype<char>::do_tolower): Cast char
2711         parameters to unsigned char.
2712         * config/os/bsd/netbsd/ctype_inline.h (ctype<char>::is): Likewise.
2713
2714 2020-01-16  François Dumont  <fdumont@gcc.gnu.org>
2715
2716         PR libstdc++/91263
2717         * include/bits/hashtable.h (_Hashtable<>): Make _Equality<> friend.
2718         * include/bits/hashtable_policy.h: Include <bits/stl_algo.h>.
2719         (_Equality_base): Remove.
2720         (_Equality<>::_M_equal): Review implementation. Use
2721         std::is_permutation.
2722         * testsuite/23_containers/unordered_multiset/operators/1.cc
2723         (Hash, Equal, test02, test03): New.
2724         * testsuite/23_containers/unordered_set/operators/1.cc
2725         (Hash, Equal, test02, test03): New.
2726
2727 2020-01-15  Jonathan Wakely  <jwakely@redhat.com>
2728
2729         PR libstdc++/93267
2730         * include/bits/iterator_concepts.h (__max_diff_type, __max_size_type):
2731         Move here from <bits/range_access.h> and define using __int128 when
2732         available.
2733         (__is_integer_like, __is_signed_integer_like): Move here from
2734         <bits/range_access.h>.
2735         (weakly_incrementable): Use __is_signed_integer_like.
2736         * include/bits/range_access.h (__max_diff_type, __max_size_type)
2737         (__is_integer_like, __is_signed_integer_like): Move to
2738         <bits/iterator_concepts.h>.
2739         (__make_unsigned_like_t): Move here from <ranges>.
2740         * include/std/ranges (__make_unsigned_like_t): Move to
2741         <bits/range_access.h>.
2742         (iota_view): Replace using-directive with using-declarations.
2743         * testsuite/std/ranges/iota/93267.cc: New test.
2744         * testsuite/std/ranges/iota_view.cc: Move to new 'iota' sub-directory.
2745
2746 2020-01-13  Jonathan Wakely  <jwakely@redhat.com>
2747
2748         PR libstdc++/93244
2749         * include/bits/fs_path.h (path::generic_string<C,A>)
2750         [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Convert root-dir to forward-slash.
2751         * testsuite/27_io/filesystem/path/generic/generic_string.cc: Check
2752         root-dir is converted to forward slash in generic pathname.
2753         * testsuite/27_io/filesystem/path/generic/utf.cc: New test.
2754         * testsuite/27_io/filesystem/path/generic/wchar_t.cc: New test.
2755
2756         PR libstdc++/58605
2757         * include/bits/atomic_base.h (__cpp_lib_atomic_value_initialization):
2758         Define.
2759         (__atomic_flag_base, __atomic_base, __atomic_base<_PTp*>)
2760         (__atomic_float): Add default member initializer for C++20.
2761         * include/std/atomic (atomic): Likewise.
2762         (atomic::atomic()): Remove noexcept-specifier on default constructor.
2763         * include/std/version (__cpp_lib_atomic_value_initialization): Define.
2764         * testsuite/29_atomics/atomic/cons/assign_neg.cc: Adjust dg-error line
2765         number.
2766         * testsuite/29_atomics/atomic/cons/copy_neg.cc: Likewise.
2767         * testsuite/29_atomics/atomic/cons/value_init.cc: New test.
2768         * testsuite/29_atomics/atomic_flag/cons/value_init.cc: New test.
2769         * testsuite/29_atomics/atomic_flag/requirements/trivial.cc: Adjust
2770         expected result for is_trivially_default_constructible.
2771         * testsuite/29_atomics/atomic_float/requirements.cc: Likewise.
2772         * testsuite/29_atomics/atomic_float/value_init.cc: New test.
2773         * testsuite/29_atomics/atomic_integral/cons/assign_neg.cc: Likewise.
2774         * testsuite/29_atomics/atomic_integral/cons/copy_neg.cc: Likewise.
2775         * testsuite/29_atomics/atomic_integral/cons/value_init.cc
2776         * testsuite/29_atomics/atomic_integral/requirements/trivial.cc: Adjust
2777         expected results for is_trivially_default_constructible.
2778         * testsuite/util/testsuite_common_types.h (has_trivial_dtor): Add
2779         new test generator.
2780
2781 2020-01-10  Jonathan Wakely  <jwakely@redhat.com>
2782
2783         * testsuite/util/testsuite_iterators.h: Improve comment.
2784
2785         * testsuite/25_algorithms/equal/deque_iterators/1.cc: Don't use C++11
2786         initialization syntax.
2787
2788         PR libstdc++/92285
2789         * include/bits/streambuf_iterator.h (istreambuf_iterator): Make type
2790         of base class independent of __cplusplus value.
2791         [__cplusplus < 201103L] (istreambuf_iterator::reference): Override the
2792         type defined in the base class
2793         * testsuite/24_iterators/istreambuf_iterator/92285.cc: New test.
2794         * testsuite/24_iterators/istreambuf_iterator/requirements/
2795         base_classes.cc: Adjust expected base class for C++98.
2796
2797 2020-01-09  Olivier Hainque  <hainque@adacore.com>
2798
2799         * doc/xml/manual/appendix_contributing.xml: Document _C2
2800         as a reserved identifier, by VxWorks.
2801         * include/bits/stl_map.h: Rename _C2 template typenames as _Cmp2.
2802         * include/bits/stl_multimap.h: Likewise.
2803
2804 2020-01-09  Jonathan Wakely  <jwakely@redhat.com>
2805
2806         * include/ext/extptr_allocator.h (_ExtPtr_allocator::operator==)
2807         (_ExtPtr_allocator::operator!=): Add missing const qualifiers.
2808         * include/ext/pointer.h (readable_traits<_Pointer_adapter<S>>): Add
2809         partial specialization to disambiguate the two constrained
2810         specializations.
2811
2812         * include/experimental/type_traits (experimental::is_pod_v): Disable
2813         -Wdeprecated-declarations warnings around reference to std::is_pod.
2814         * include/std/type_traits (is_pod_v): Likewise.
2815         * testsuite/18_support/max_align_t/requirements/2.cc: Also check
2816         is_standard_layout and is_trivial. Do not check is_pod for C++20.
2817         * testsuite/20_util/is_pod/requirements/explicit_instantiation.cc:
2818         Add -Wno-deprecated for C++20.
2819         * testsuite/20_util/is_pod/requirements/typedefs.cc: Likewise.
2820         * testsuite/20_util/is_pod/value.cc: Likewise.
2821         * testsuite/experimental/type_traits/value.cc: Likewise.
2822
2823 2020-01-09  JeanHeyd "ThePhD" Meneide  <phdofthehouse@gmail.com>
2824
2825         * include/bits/c++config (_GLIBCXX20_DEPRECATED): Add new macro.
2826         * include/std/type_traits (is_pod, is_pod_v): Deprecate for C++20.
2827         * testuite/20_util/is_pod/deprecated-2a.cc: New test.
2828
2829 2020-01-09  Jonathan Wakely  <jwakely@redhat.com>
2830
2831         PR libstdc++/93205
2832         * include/bits/random.h (operator>>): Check stream operation succeeds.
2833         * include/bits/random.tcc (operator<<): Remove redundant __ostream_type
2834         typedefs.
2835         (operator>>): Remove redundant __istream_type typedefs. Check stream
2836         operations succeed.
2837         (__extract_params): New function to fill a vector from a stream.
2838         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error line.
2839
2840         PR libstdc++/93208
2841         * config/abi/pre/gnu.ver: Add new exports.
2842         * include/std/memory_resource (memory_resource::~memory_resource()):
2843         Do not define inline.
2844         (monotonic_buffer_resource::~monotonic_buffer_resource()): Likewise.
2845         * src/c++17/memory_resource.cc (memory_resource::~memory_resource()):
2846         Define.
2847         (monotonic_buffer_resource::~monotonic_buffer_resource()): Define.
2848         * testsuite/20_util/monotonic_buffer_resource/93208.cc: New test.
2849
2850 2020-01-09  François Dumont  <fdumont@gcc.gnu.org>
2851
2852         PR libstdc++/92124
2853         * include/bits/hashtable.h (_Hashtable<>::__alloc_node_gen_t): New
2854         template alias.
2855         (_Hashtable<>::__fwd_value_for): New.
2856         (_Hashtable<>::_M_assign_elements<>): Remove _NodeGenerator template
2857         parameter.
2858         (_Hashtable<>::_M_assign<>): Add _Ht template parameter.
2859         (_Hashtable<>::operator=(const _Hashtable<>&)): Adapt.
2860         (_Hashtable<>::_M_move_assign): Adapt. Replace std::move_if_noexcept
2861         with std::move.
2862         (_Hashtable<>::_Hashtable(const _Hashtable&)): Adapt.
2863         (_Hashtable<>::_Hashtable(const _Hashtable&, const allocator_type&)):
2864         Adapt.
2865         (_Hashtable<>::_Hashtable(_Hashtable&&, const allocator_type&)):
2866         Adapt.
2867         * testsuite/23_containers/unordered_set/92124.cc: New.
2868
2869 2020-01-08  Jonathan Wakely  <jwakely@redhat.com>
2870
2871         PR libstdc++/93201
2872         * src/c++17/fs_ops.cc (do_remove_all): New function implementing more
2873         detailed error reporting for remove_all. Check result of recursive
2874         call before incrementing iterator.
2875         (remove_all(const path&), remove_all(const path&, error_code&)): Use
2876         do_remove_all.
2877         * src/filesystem/ops.cc (remove_all(const path&, error_code&)): Check
2878         result of recursive call before incrementing iterator.
2879         * testsuite/27_io/filesystem/operations/remove_all.cc: Check errors
2880         are reported correctly.
2881         * testsuite/experimental/filesystem/operations/remove_all.cc: Likewise.
2882
2883 2020-01-07  Thomas Rodgers  <trodgers@redhat.com>
2884
2885         * include/std/condition_variable
2886         (condition_variable_any::wait_on): Rename to match current draft
2887         standard.
2888         (condition_variable_any::wait_on_until): Likewise.
2889         (condition_variable_any::wait_on_for): Likewise.
2890         * testsuite/30_threads/condition_variable_any/stop_token/wait_on.cc:
2891         Adjust tests to account for renamed methods.
2892
2893 2020-01-07  François Dumont  <fdumont@gcc.gnu.org>
2894
2895         PR libstdc++/92124
2896         * include/bits/stl_tree.h
2897         (_Rb_tree<>::_M_move_assign(_Rb_tree&, false_type)): Replace
2898         std::move_if_noexcept by std::move.
2899         * testsuite/23_containers/map/92124.cc: New.
2900         * testsuite/23_containers/set/92124.cc: New.
2901
2902 2020-01-06  Jonathan Wakely  <jwakely@redhat.com>
2903
2904         * include/std/stop_token (stop_token): Remove operator!= (LWG 3254).
2905         (stop_source): Likewise (LWG 3362).
2906         * testsuite/30_threads/stop_token/stop_source.cc: Test equality
2907         comparisons.
2908
2909         * include/bits/stl_algobase.h (__is_byte_iter, __min_cmp)
2910         (lexicographical_compare_three_way): Do not depend on
2911         __cpp_lib_concepts.
2912         * include/std/version (__cpp_lib_three_way_comparison): Only define
2913         when __cpp_lib_concepts is defined.
2914         * libsupc++/compare (__cpp_lib_three_way_comparison): Likewise.
2915
2916 2020-01-03  Jonathan Wakely  <jwakely@redhat.com>
2917
2918         * include/bits/stl_algobase.h (lexicographical_compare_three_way):
2919         Only define four-argument overload when __cpp_lib_concepts is defined.
2920
2921 2020-01-01  John David Anglin  <danglin@gcc.gnu.org>
2922
2923         * config/abi/post/hppa-linux-gnu/baseline_symbols.txt: Update.
2924
2925 2020-01-01  Jakub Jelinek  <jakub@redhat.com>
2926
2927         Update copyright years.
2928 \f
2929 Copyright (C) 2020 Free Software Foundation, Inc.
2930
2931 Copying and distribution of this file, with or without modification,
2932 are permitted in any medium without royalty provided the copyright
2933 notice and this notice are preserved.