libstdc++-v3/ChangeLog

   1 2020-10-13  Nuno Lopes  <nuno.lopes@ist.utl.pt>
   2
   3         * include/bits/stl_algo.h (any_of): Fix incorrect description
   4         in comment.
   5
   6 2020-10-13  Jonathan Wakely  <jwakely@redhat.com>
   7
   8         * doc/xml/manual/evolution.xml: Document some API changes
   9         and deprecations.
  10         * doc/xml/manual/intro.xml: Document LWG 2499.
  11         * doc/xml/manual/status_cxx2020.xml: Update status.
  12         * doc/html/*: Regenerate.
  13
  14 2020-10-13  Jonathan Wakely  <jwakely@redhat.com>
  15
  16         * doc/xml/book.txml: Remove trailing whitespace.
  17         * doc/xml/chapter.txml: Likewise.
  18         * doc/xml/class.txml: Likewise.
  19         * doc/xml/gnu/fdl-1.3.xml: Likewise.
  20         * doc/xml/gnu/gpl-3.0.xml: Likewise.
  21         * doc/xml/manual/abi.xml: Likewise.
  22         * doc/xml/manual/algorithms.xml: Likewise.
  23         * doc/xml/manual/allocator.xml: Likewise.
  24         * doc/xml/manual/appendix_contributing.xml: Likewise.
  25         * doc/xml/manual/appendix_free.xml: Likewise.
  26         * doc/xml/manual/appendix_porting.xml: Likewise.
  27         * doc/xml/manual/atomics.xml: Likewise.
  28         * doc/xml/manual/auto_ptr.xml: Likewise.
  29         * doc/xml/manual/backwards_compatibility.xml: Likewise.
  30         * doc/xml/manual/bitmap_allocator.xml: Likewise.
  31         * doc/xml/manual/build_hacking.xml: Likewise.
  32         * doc/xml/manual/codecvt.xml: Likewise.
  33         * doc/xml/manual/concurrency.xml: Likewise.
  34         * doc/xml/manual/concurrency_extensions.xml: Likewise.
  35         * doc/xml/manual/configure.xml: Likewise.
  36         * doc/xml/manual/containers.xml: Likewise.
  37         * doc/xml/manual/ctype.xml: Likewise.
  38         * doc/xml/manual/debug.xml: Likewise.
  39         * doc/xml/manual/debug_mode.xml: Likewise.
  40         * doc/xml/manual/diagnostics.xml: Likewise.
  41         * doc/xml/manual/documentation_hacking.xml: Likewise.
  42         * doc/xml/manual/evolution.xml: Likewise.
  43         * doc/xml/manual/internals.xml: Likewise.
  44         * doc/xml/manual/intro.xml: Likewise.
  45         * doc/xml/manual/io.xml: Likewise.
  46         * doc/xml/manual/iterators.xml: Likewise.
  47         * doc/xml/manual/locale.xml: Likewise.
  48         * doc/xml/manual/localization.xml: Likewise.
  49         * doc/xml/manual/messages.xml: Likewise.
  50         * doc/xml/manual/mt_allocator.xml: Likewise.
  51         * doc/xml/manual/numerics.xml: Likewise.
  52         * doc/xml/manual/parallel_mode.xml: Likewise.
  53         * doc/xml/manual/policy_data_structures.xml: Likewise.
  54         * doc/xml/manual/prerequisites.xml: Likewise.
  55         * doc/xml/manual/shared_ptr.xml: Likewise.
  56         * doc/xml/manual/spine.xml: Likewise.
  57         * doc/xml/manual/status_cxxtr1.xml: Likewise.
  58         * doc/xml/manual/status_cxxtr24733.xml: Likewise.
  59         * doc/xml/manual/strings.xml: Likewise.
  60         * doc/xml/manual/support.xml: Likewise.
  61         * doc/xml/manual/test.xml: Likewise.
  62         * doc/xml/manual/test_policy_data_structures.xml: Likewise.
  63         * doc/xml/manual/using.xml: Likewise.
  64         * doc/xml/manual/using_exceptions.xml: Likewise.
  65         * doc/xml/manual/utilities.xml: Likewise.
  66         * doc/html/*: Regenerate.
  67
  68 2020-10-12  Patrick Palka  <ppalka@redhat.com>
  69
  70         * include/std/ranges (take_while_view::begin): Constrain the
  71         const overload further as per LWG 3450.
  72         (take_while_view::end): Likewise.
  73         * testsuite/std/ranges/adaptors/take_while.cc: Add test for LWG
  74         3450.
  75
  76 2020-10-12  Patrick Palka  <ppalka@redhat.com>
  77
  78         PR libstdc++/95322
  79         * include/std/ranges (take_view::_CI): Define this alias
  80         template as per LWG 3449 and remove ...
  81         (take_view::_Sentinel::_CI): ... this type alias.
  82         (take_view::_Sentinel::operator==): Adjust use of _CI
  83         accordingly.  Define a second overload that accepts an iterator
  84         of the opposite constness as per LWG 3449.
  85         (take_while_view::_Sentinel::operator==): Likewise.
  86         * testsuite/std/ranges/adaptors/95322.cc: Add tests for LWG 3449.
  87
  88 2020-10-12  Jonathan Wakely  <jwakely@redhat.com>
  89
  90         * doc/doxygen/user.cfg.in: Update to Doxygen 1.8.20 format.
  91
  92 2020-10-12  Jonathan Wakely  <jwakely@redhat.com>
  93
  94         * doc/doxygen/user.cfg.in (PREDEFINED): Use __cplusplus=201703L
  95         so that C++17 features are documented.
  96
  97 2020-10-12  Jonathan Wakely  <jwakely@redhat.com>
  98
  99         * include/bits/stl_algobase.h (copy, move, copy_backward)
 100         (move_backward): Fix documentation for returned iterator.
 101
 102 2020-10-12  Martin Sebor  <msebor@redhat.com>
 103
 104         PR c++/97201
 105         * libsupc++/new (operator new): Add attribute alloc_size and malloc.
 106
 107 2020-10-11  Clement Chigot  <clement.chigot@atos.net>
 108
 109         * config/os/aix/t-aix: Add complementary mode object file to
 110         libstdc++fs.a
 111
 112 2020-10-10  Jonathan Wakely  <jwakely@redhat.com>
 113
 114         PR libstdc++/97362
 115         * doc/html/manual/source_code_style.html: Regenerate.
 116         * doc/xml/manual/appendix_contributing.xml: Add __deref to
 117         BADNAMES.
 118         * include/debug/functions.h (_Irreflexive_checker::__deref):
 119         Rename to __ref.
 120         * testsuite/17_intro/badnames.cc: Check __deref.
 121
 122 2020-10-10  Ville Voutilainen  <ville.voutilainen@gmail.com>
 123
 124         * include/std/variant (__check_visitor_result):
 125         Use size_t for indexes.
 126         (__check_visitor_results): Likewise.
 127
 128 2020-10-09  Ville Voutilainen  <ville.voutilainen@gmail.com>
 129
 130         PR libstdc++/95904
 131         * include/std/variant (__deduce_visit_result): Add a nested ::type.
 132         (__gen_vtable_impl</*base case*/>::_S_apply):
 133         Check the visitor return type.
 134         (__same_types): New.
 135         (__check_visitor_result): Likewise.
 136         (__check_visitor_results): Likewise.
 137         (visit(_Visitor&&, _Variants&&...)): Use __check_visitor_results
 138         in case we're visiting just one variant.
 139         * testsuite/20_util/variant/visit_neg.cc: Adjust.
 140
 141 2020-10-09  Jonathan Wakely  <jwakely@redhat.com>
 142
 143         PR libstdc++/97311
 144         * include/bits/random.tcc (seed_seq::generate): Use uint32_t for
 145         calculations. Also split the first loop into three loops to
 146         avoid branching on k on every iteration, resolving PR 94823.
 147         * testsuite/26_numerics/random/seed_seq/97311.cc: New test.
 148         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-erro
 149         line number.
 150
 151 2020-10-09  Daniel Lemire  <lemire@gmail.com>
 152
 153         * include/bits/uniform_int_dist.h (uniform_int_distribution::_S_nd):
 154         New member function implementing Lemire's "nearly divisionless"
 155         algorithm.
 156         (uniform_int_distribution::operator()): Use _S_nd when the range
 157         of the URBG is the full width of the result type.
 158
 159 2020-10-09  Jonathan Wakely  <jwakely@redhat.com>
 160
 161         * testsuite/Makefile.am: Set and export variable separately.
 162         * testsuite/Makefile.in: Regenerate.
 163
 164 2020-10-09  Jonathan Wakely  <jwakely@redhat.com>
 165
 166         * scripts/check_performance: Use gnu++11 instead of gnu++0x.
 167         * testsuite/Makefile.am (check-performance): Export CXXFLAGS to
 168         child process.
 169         * testsuite/Makefile.in: Regenerate.
 170
 171 2020-10-09  Jonathan Wakely  <jwakely@redhat.com>
 172
 173         * testsuite/performance/26_numerics/random_dist.cc: New test.
 174
 175 2020-10-09  Jonathan Wakely  <jwakely@redhat.com>
 176
 177         * testsuite/util/testsuite_performance.h (report_header): Remove
 178         unused variable.
 179
 180 2020-10-08  Patrick Palka  <ppalka@redhat.com>
 181
 182         PR libstdc++/95788
 183         * include/bits/ranges_uninitialized.h:
 184         (__construct_at_fn::operator()): Rewrite in terms of
 185         std::construct_at.  Declare it conditionally noexcept.  Qualify
 186         calls to declval in its requires-clause.
 187         * testsuite/20_util/specialized_algorithms/construct_at/95788.cc:
 188         New test.
 189
 190 2020-10-08  Jonathan Wakely  <jwakely@redhat.com>
 191
 192         PR libstdc++/82584
 193         * include/bits/random.tcc
 194         (discrete_distribution::param_type::_M_initialize)
 195         (piecewise_constant_distribution::param_type::_M_initialize)
 196         (piecewise_linear_distribution::param_type::_M_initialize):
 197         Add assertions for positive sums..
 198         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error
 199         line.
 200
 201 2020-10-08  Jonathan Wakely  <jwakely@redhat.com>
 202
 203         * include/bits/ios_base.h (ios_base::failure): Add constructors
 204         takeing error_code argument. Add code() member function.
 205         * testsuite/27_io/ios_base/failure/cxx11.cc: Allow test to
 206         run for the old ABI but do not check for derivation from
 207         std::system_error.
 208         * testsuite/27_io/ios_base/failure/error_code.cc: New test.
 209
 210 2020-10-08  Jonathan Wakely  <jwakely@redhat.com>
 211
 212         * include/bits/random.h (__detail::_Mod): Revert last change.
 213         (__detail::__mod): Do not use _Mod for a==0 case.
 214         * testsuite/26_numerics/random/linear_congruential_engine/operators/call.cc:
 215         Check other cases with a==0. Also check runtime results.
 216         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error
 217         line.
 218
 219 2020-10-07  Jonathan Wakely  <jwakely@redhat.com>
 220
 221         * include/bits/random.h (__detail::_Mod): Avoid divide by zero.
 222         * testsuite/26_numerics/random/linear_congruential_engine/operators/call.cc:
 223         New test.
 224
 225 2020-10-07  Jonathan Wakely  <jwakely@redhat.com>
 226
 227         * include/bits/random.h (seed_seq(initializer_list<T>)): Rename
 228         parameter to use reserved name.
 229         * include/bits/ranges_algo.h (shift_left, shift_right): Rename
 230         template parameters to use reserved name.
 231         * libsupc++/exception_ptr.h (exception_ptr): Likewise for
 232         parameters and local variables.
 233         * testsuite/17_intro/names.cc: Check "il". Do not check "d" and
 234         "y" in C++20 mode.
 235
 236 2020-10-06  Jonathan Wakely  <jwakely@redhat.com>
 237
 238         PR libstdc++/90295
 239         * config/abi/pre/gnu.ver (CXXABI_1.3.13): New symbol version.
 240         (exception_ptr::_M_addref(), exception_ptr::_M_release()):
 241         Export symbols.
 242         * libsupc++/eh_ptr.cc (exception_ptr::exception_ptr()):
 243         Remove out-of-line definition.
 244         (exception_ptr::exception_ptr(const exception_ptr&)):
 245         Likewise.
 246         (exception_ptr::~exception_ptr()): Likewise.
 247         (exception_ptr::operator=(const exception_ptr&)):
 248         Likewise.
 249         (exception_ptr::swap(exception_ptr&)): Likewise.
 250         (exception_ptr::_M_addref()): Add branch prediction.
 251         * libsupc++/exception_ptr.h (exception_ptr::operator bool):
 252         Add noexcept.
 253         [!_GLIBCXX_EH_PTR_COMPAT] (operator==, operator!=): Define
 254         inline as hidden friends. Remove declarations at namespace
 255         scope.
 256         (exception_ptr::exception_ptr()): Define inline.
 257         (exception_ptr::exception_ptr(const exception_ptr&)):
 258         Likewise.
 259         (exception_ptr::~exception_ptr()): Likewise.
 260         (exception_ptr::operator=(const exception_ptr&)):
 261         Likewise.
 262         (exception_ptr::swap(exception_ptr&)): Likewise.
 263         * testsuite/util/testsuite_abi.cc: Add CXXABI_1.3.13.
 264         * testsuite/18_support/exception_ptr/90295.cc: New test.
 265
 266 2020-10-06  Jonathan Wakely  <jwakely@redhat.com>
 267
 268         * include/std/ranges (join_view): Remove deduction guide.
 269         (views::join): Add explicit template argument list to prevent
 270         deducing the wrong type.
 271         * testsuite/std/ranges/adaptors/join.cc: Move test for LWG 3474
 272         here, from ...
 273         * testsuite/std/ranges/adaptors/join_lwg3474.cc: Removed.
 274
 275 2020-10-05  Jonathan Wakely  <jwakely@redhat.com>
 276
 277         * include/bits/regex.h: Use __int_traits<int> instead of
 278         std::numeric_limits<int>.
 279         * include/bits/uniform_int_dist.h: Use __int_traits<T>::__max
 280         instead of std::numeric_limits<T>::max().
 281         * include/bits/hashtable_policy.h: Use size_t(-1) instead of
 282         std::numeric_limits<size_t>::max().
 283         * include/std/regex: Include <ext/numeric_traits.h>.
 284         * include/std/string_view: Use typedef for __int_traits<int>.
 285         * src/c++11/hashtable_c++0x.cc: Use size_t(-1) instead of
 286         std::numeric_limits<size_t>::max().
 287         * testsuite/std/ranges/iota/96042.cc: Include <limits>.
 288         * testsuite/std/ranges/iota/difference_type.cc: Likewise.
 289         * testsuite/std/ranges/subrange/96042.cc: Likewise.
 290
 291 2020-10-05  Jonathan Wakely  <jwakely@redhat.com>
 292
 293         * include/std/numeric: Move all #include directives to the top
 294         of the header.
 295         * testsuite/26_numerics/gcd/gcd_neg.cc: Adjust dg-error line
 296         numbers.
 297         * testsuite/26_numerics/lcm/lcm_neg.cc: Likewise.
 298
 299 2020-10-05  Jonathan Wakely  <jwakely@redhat.com>
 300
 301         * config/abi/pre/gnu.ver: Add new symbol.
 302         * include/bits/functexcept.h (__throw_bad_array_new_length):
 303         Declare new function.
 304         * include/ext/malloc_allocator.h (malloc_allocator::allocate):
 305         Throw bad_array_new_length for impossible sizes (LWG 3190).
 306         * include/ext/new_allocator.h (new_allocator::allocate):
 307         Likewise.
 308         * include/std/memory_resource (polymorphic_allocator::allocate)
 309         (polymorphic_allocator::allocate_object): Use new function,
 310         __throw_bad_array_new_length.
 311         * src/c++11/functexcept.cc (__throw_bad_array_new_length):
 312         Define.
 313         * testsuite/20_util/allocator/lwg3190.cc: New test.
 314
 315 2020-10-05  Mike Crowe  <mac@mcrowe.com>
 316
 317         PR libstdc++/91486
 318         * include/bits/atomic_futex.h:
 319         (__atomic_futex_unsigned::_M_load_when_equal_until): Use target
 320         clock duration type when rounding.
 321         * testsuite/30_threads/async/async.cc (test_pr91486_wait_for):
 322         Rename from test_pr91486.
 323         (float_steady_clock): New class for test.
 324         (test_pr91486_wait_until): New test.
 325
 326 2020-10-05  Mike Crowe  <mac@mcrowe.com>
 327
 328         * testsuite/20_util/duration_cast/rounding_c++11.cc: Copy
 329         rounding.cc and alter to support compilation for C++11 and to
 330         test std::chrono::__detail::ceil.
 331
 332 2020-10-02  Jonathan Wakely  <jwakely@redhat.com>
 333
 334         * testsuite/29_atomics/atomic_float/value_init.cc: Use float
 335         instead of double so that __atomic_load_8 isn't needed.
 336
 337 2020-10-02  Jonathan Wakely  <jwakely@redhat.com>
 338
 339         * testsuite/18_support/96817.cc: Use terminate handler that
 340         calls _Exit(0).
 341
 342 2020-10-02  Patrick Palka  <ppalka@redhat.com>
 343
 344         * include/bits/stl_iterator.h (reverse_iterator::iter_move):
 345         Define for C++20 as per P0896.
 346         (reverse_iterator::iter_swap): Likewise.
 347         (move_iterator::operator*): Apply P0896 changes for C++20.
 348         (move_iterator::operator[]): Likewise.
 349         * testsuite/24_iterators/reverse_iterator/cust.cc: New test.
 350
 351 2020-10-01  Jonathan Wakely  <jwakely@redhat.com>
 352
 353         * config/cpu/arm/cxxabi_tweaks.h (_GLIBCXX_GUARD_TEST_AND_ACQUIRE):
 354         Do not try to dereference return value of __atomic_load_n.
 355
 356 2020-09-30  Jonathan Wakely  <jwakely@redhat.com>
 357
 358         * config/cpu/arm/cxxabi_tweaks.h (_GLIBCXX_GUARD_TEST_AND_ACQUIRE):
 359         (_GLIBCXX_GUARD_SET_AND_RELEASE): Define for EABI.
 360
 361 2020-09-30  Jonathan Wakely  <jwakely@redhat.com>
 362
 363         * include/bits/c++config (_GLIBCXX_HAVE_BUILTIN_IS_SAME):
 364         Define for GCC 11 or when !__is_identifier(__is_same).
 365         (_GLIBCXX_BUILTIN_IS_SAME_AS): Remove.
 366         * include/std/type_traits (is_same, is_same_v): Replace uses
 367         of _GLIBCXX_BUILTIN_IS_SAME_AS.
 368
 369 2020-09-28  Patrick Palka  <ppalka@redhat.com>
 370
 371         * include/std/ranges (filter_view): Declare the data member
 372         _M_base last instead of first, and adjust constructors' member
 373         initializer lists accordingly.
 374         (transform_view): Likewise.
 375         (take_view): Likewise.
 376         (take_while_view): Likewise.
 377         (drop_view): Likewise.
 378         (drop_while_view): Likewise.
 379         (join_view): Likewise.
 380         (split_view): Likewise (and tweak nearby formatting).
 381         (reverse_view): Likewise.
 382         * testsuite/std/ranges/adaptors/sizeof.cc: Update expected
 383         sizes.
 384
 385 2020-09-28  Patrick Palka  <ppalka@redhat.com>
 386
 387         * testsuite/std/ranges/adaptors/sizeof.cc: New test.
 388
 389 2020-09-28  Patrick Palka  <ppalka@redhat.com>
 390
 391         * include/bits/ranges_util.h (subrange::_M_end): Give it
 392         [[no_unique_address]].
 393         * testsuite/std/ranges/subrange/sizeof.cc: New test.
 394
 395 2020-09-28  Patrick Palka  <ppalka@redhat.com>
 396
 397         * include/std/ranges (iota_view::_M_bound): Give it
 398         [[no_unique_address]].
 399         * testsuite/std/ranges/iota/iota_view.cc: Check that an
 400         unbounded iota_view has minimal size.
 401
 402 2020-09-27  Clement Chigot  <clement.chigot@atos.net>
 403
 404         * config/os/aix/t-aix: Use $(AR) without -X32_64.
 405
 406 2020-09-26  Jonathan Wakely  <jwakely@redhat.com>
 407
 408         PR libstdc++/96817
 409         * include/ext/atomicity.h (__gnu_cxx::__is_single_threaded()):
 410         New function wrapping __libc_single_threaded if available.
 411         (__exchange_and_add_dispatch, __atomic_add_dispatch): Use it.
 412         * libsupc++/guard.cc (__cxa_guard_acquire, __cxa_guard_abort)
 413         (__cxa_guard_release): Likewise.
 414         * testsuite/18_support/96817.cc: New test.
 415
 416 2020-09-25  Jonathan Wakely  <jwakely@redhat.com>
 417
 418         * libsupc++/Makefile.am: Remove redundant -std=gnu++1z flags.
 419         * libsupc++/Makefile.in: Regenerate.
 420
 421 2020-09-24  Antony Polukhin  <antoshkka@gmail.com>
 422
 423         PR libstdc++/71579
 424         * include/std/type_traits (invoke_result, is_invocable)
 425         (is_invocable_r, is_nothrow_invocable, is_nothrow_invocable_r):
 426         Add static_asserts to make sure that the arguments of the type
 427         traits are not misused with incomplete types.
 428         * testsuite/20_util/invoke_result/incomplete_args_neg.cc: New test.
 429         * testsuite/20_util/is_invocable/incomplete_args_neg.cc: New test.
 430         * testsuite/20_util/is_invocable/incomplete_neg.cc: New test.
 431         * testsuite/20_util/is_nothrow_invocable/incomplete_args_neg.cc:
 432         New test.
 433         * testsuite/20_util/is_nothrow_invocable/incomplete_neg.cc: Check
 434         for error on incomplete type usage in trait.
 435
 436 2020-09-24  Patrick Palka  <ppalka@redhat.com>
 437
 438         * include/std/ranges (__detail::__boxable): Split out the
 439         associated constraints of __box into here.
 440         (__detail::__box): Use the __boxable concept.  Define a leaner
 441         partial specialization for semiregular types.
 442         (single_view::_M_value): Give it [[no_unique_address]].
 443         (filter_view::_M_pred): Likewise.
 444         (transform_view::_M_fun): Likewise.
 445         (take_while_view::_M_pred): Likewise.
 446         (drop_while_view::_M_pred):: Likewise.
 447         * testsuite/std/ranges/adaptors/detail/semiregular_box.cc: New
 448         test.
 449
 450 2020-09-24  Jonathan Wakely  <jwakely@redhat.com>
 451
 452         * doc/xml/manual/configure.xml: Correct name of option.
 453         * doc/html/*: Regenerate.
 454
 455 2020-09-22  Jonathan Wakely  <jwakely@redhat.com>
 456
 457         PR libstdc++/97167
 458         * src/c++17/fs_path.cc (path::_Parser::root_path()): Check
 459         for empty string before inspecting the first character.
 460         * testsuite/27_io/filesystem/path/append/source.cc: Append
 461         empty string_view to path.
 462
 463 2020-09-22  Glen Joseph Fernandes  <glenjofe@gmail.com>
 464
 465         * include/bits/align.h (align): Fix overflow handling.
 466         * testsuite/20_util/align/3.cc: New test.
 467
 468 2020-09-22  Jonathan Wakely  <jwakely@redhat.com>
 469
 470         * include/Makefile.am: Add new headers and adjust for renamed
 471         header.
 472         * include/Makefile.in: Regenerate.
 473         * include/bits/iterator_concepts.h: Adjust for renamed header.
 474         * include/bits/range_access.h (ranges::*): Move to new
 475         <bits/ranges_base.h> header.
 476         * include/bits/ranges_algobase.h: Include new <bits/ranges_base.h>
 477         header instead of <ranges>.
 478         * include/bits/ranges_algo.h: Include new <bits/ranges_util.h>
 479         header.
 480         * include/bits/range_cmp.h: Moved to...
 481         * include/bits/ranges_cmp.h: ...here.
 482         * include/bits/ranges_base.h: New header.
 483         * include/bits/ranges_util.h: New header.
 484         * include/experimental/string_view: Include new
 485         <bits/ranges_base.h> header.
 486         * include/std/functional: Adjust for renamed header.
 487         * include/std/ranges (ranges::view_base, ranges::enable_view)
 488         (ranges::dangling, ranges::borrowed_iterator_t): Move to new
 489         <bits/ranges_base.h> header.
 490         (ranges::view_interface, ranges::subrange)
 491         (ranges::borrowed_subrange_t): Move to new <bits/ranges_util.h>
 492         header.
 493         * include/std/span: Include new <bits/ranges_base.h> header.
 494         * include/std/string_view: Likewise.
 495         * testsuite/24_iterators/back_insert_iterator/pr93884.cc: Add
 496         missing <ranges> header.
 497         * testsuite/24_iterators/front_insert_iterator/pr93884.cc:
 498         Likewise.
 499
 500 2020-09-22  Jonathan Wakely  <jwakely@redhat.com>
 501
 502         PR libstdc++/96803
 503         * include/std/tuple
 504         (_Tuple_impl(allocator_arg_t, Alloc, const _Tuple_impl<U...>&)):
 505         Use correct value category in __use_alloc call.
 506         * testsuite/20_util/tuple/cons/96803.cc: Check with constructors
 507         that require correct value category to be used.
 508
 509 2020-09-22  Patrick Palka  <ppalka@redhat.com>
 510
 511         * include/std/span (span::front): Remove static_assert.
 512         (span::back): Likewise.
 513         (span::operator[]): Likewise.
 514         * testsuite/23_containers/span/back_neg.cc: Rewrite to verify
 515         that we check the preconditions of back() only when it's called.
 516         * testsuite/23_containers/span/front_neg.cc: Likewise for
 517         front().
 518         * testsuite/23_containers/span/index_op_neg.cc: Likewise for
 519         operator[].
 520
 521 2020-09-22  Patrick Palka  <ppalka@redhat.com>
 522
 523         * include/bits/stl_algo.h (__sample): Exit early when the
 524         input range is empty.
 525         * testsuite/25_algorithms/sample/3.cc: New test.
 526
 527 2020-09-22  Patrick Palka  <ppalka@redhat.com>
 528
 529         * include/bits/stl_algo.h (for_each_n): Mark constexpr for C++20.
 530         (search): Likewise for the overload that takes a searcher.
 531         * testsuite/25_algorithms/for_each/constexpr.cc: Test constexpr
 532         std::for_each_n.
 533         * testsuite/25_algorithms/search/constexpr.cc: Test constexpr
 534         std::search overload that takes a searcher.
 535
 536 2020-09-21  Jonathan Wakely  <jwakely@redhat.com>
 537
 538         * include/bits/c++config (__replacement_assert): Add noreturn
 539         attribute.
 540         (__glibcxx_assert_impl): Use __builtin_expect to hint that the
 541         assertion is expected to pass.
 542
 543 2020-09-21  Jonathan Wakely  <jwakely@redhat.com>
 544
 545         * include/std/ranges (drop_view::begin()): Adjust constraints
 546         to match the correct condition for O(1) ranges::next (LWG 3482).
 547         * testsuite/std/ranges/adaptors/drop.cc: Check that iterator is
 548         cached for non-sized_range.
 549
 550 2020-09-21  Jonathan Wakely  <jwakely@redhat.com>
 551
 552         * include/std/ranges (transform_view, elements_view): Relax
 553         constraints on operator- for iterators, as per LWG 3483.
 554         * testsuite/std/ranges/adaptors/elements.cc: Check that we
 555         can take the difference of two iterators from a non-random
 556         access range.
 557         * testsuite/std/ranges/adaptors/transform.cc: Likewise.
 558
 559 2020-09-21  Jonathan Wakely  <jwakely@redhat.com>
 560
 561         PR libstdc++/97132
 562         * include/bits/align.h (align) [!_GLIBCXX_USE_C99_STDINT_TR1]:
 563         Remove unused code.
 564         (assume_aligned): Do not use __builtin_assume_aligned during
 565         constant evaluation.
 566         * testsuite/20_util/assume_aligned/1.cc: Improve test.
 567         * testsuite/20_util/assume_aligned/97132.cc: New test.
 568
 569 2020-09-20  Jonathan Wakely  <jwakely@redhat.com>
 570
 571         PR libstdc++/97101
 572         * include/std/functional (bind_front): Fix order of parameters
 573         in is_nothrow_constructible_v specialization.
 574         * testsuite/20_util/function_objects/bind_front/97101.cc: New test.
 575
 576 2020-09-11  Thomas Rodgers  <trodgers@redhat.com>
 577
 578         * include/std/memory: Move #include <bits/align.h> inside C++11
 579         conditional includes.
 580
 581 2020-09-11  Thomas Rodgers  <trodgers@redhat.com>
 582
 583         * include/Makefile.am (bits_headers): Add new header.
 584         * include/Makefile.in: Regenerate.
 585         * include/bits/align.h: New file.
 586         * include/std/memory (align): Move definition to bits/align.h.
 587         (assume_aligned): Likewise.
 588
 589 2020-09-11  Jonathan Wakely  <jwakely@redhat.com>
 590
 591         * include/std/chrono [C++17] (chrono::__detail::ceil): Add
 592         using declaration to make chrono::ceil available for internal
 593         use with a consistent name.
 594         (chrono::__detail::__ceil_impl): New function template.
 595         (chrono::__detail::ceil): Use __ceil_impl to compare and
 596         increment the value. Remove SFINAE constraint.
 597
 598 2020-09-11  Jonathan Wakely  <jwakely@redhat.com>
 599
 600         * include/bits/regex_error.h (__throw_regex_error): Fix
 601         parameter declaration and use reserved attribute names.
 602
 603 2020-09-11  Mike Crowe  <mac@mcrowe.com>
 604
 605         * include/std/condition_variable (condition_variable::wait_until):
 606         Convert delta to steady_clock duration before adding to current
 607         steady_clock time to avoid rounding errors described in PR68519.
 608         (condition_variable::wait_for): Simplify calculation of absolute
 609         time by using chrono::__detail::ceil in both overloads.
 610         * testsuite/30_threads/condition_variable/members/68519.cc:
 611         (test_wait_for): Renamed from test01. Replace unassigned val
 612         variable with constant false. Reduce scope of mx and cv
 613         variables to just test_wait_for function.
 614         (test_wait_until): Add new test case.
 615
 616 2020-09-11  Mike Crowe  <mac@mcrowe.com>
 617
 618         PR libstdc++/91486
 619         * include/bits/atomic_futex.h
 620         (__atomic_futex_unsigned::_M_load_when_equal_for)
 621         (__atomic_futex_unsigned::_M_load_when_equal_until): Use
 622         __detail::ceil to convert delta to the reference clock
 623         duration type to avoid resolution problems.
 624         * include/std/chrono (__detail::ceil): Move implementation
 625         of std::chrono::ceil into private namespace so that it's
 626         available to pre-C++17 code.
 627         * testsuite/30_threads/async/async.cc (test_pr91486):
 628         Test __atomic_futex_unsigned::_M_load_when_equal_for.
 629
 630 2020-09-11  Mike Crowe  <mac@mcrowe.com>
 631
 632         * include/bits/atomic_futex.h
 633         (__atomic_futex_unsigned::_M_load_when_equal_until): Add
 634         loop on generic _Clock to check the timeout against _Clock
 635         again after _M_load_when_equal_until returns indicating a
 636         timeout.
 637         * testsuite/30_threads/async/async.cc: Invent slow_clock
 638         that runs at an eleventh of steady_clock's speed. Use it
 639         to test the user-supplied-clock variant of
 640         __atomic_futex_unsigned::_M_load_when_equal_until works
 641         generally with test03 and loops correctly when the timeout
 642         time hasn't been reached in test04.
 643
 644 2020-09-11  Mike Crowe  <mac@mcrowe.com>
 645
 646         PR libstdc++/93542
 647         * include/bits/atomic_futex.h (__atomic_futex_unsigned): Change
 648         __clock_t typedef to use steady_clock so that unknown clocks are
 649         synced to it rather than system_clock. Change existing __clock_t
 650         overloads of _M_load_and_text_until_impl and
 651         _M_load_when_equal_until to use system_clock explicitly. Remove
 652         comment about DR 887 since these changes address that problem as
 653         best as we currently able.
 654
 655 2020-09-11  Mike Crowe  <mac@mcrowe.com>
 656
 657         PR libstdc++/93542
 658         * config/abi/pre/gnu.ver: Update for addition of
 659         __atomic_futex_unsigned_base::_M_futex_wait_until_steady.
 660         * include/bits/atomic_futex.h (__atomic_futex_unsigned_base):
 661         Add comments to clarify that _M_futex_wait_until and
 662         _M_load_and_test_until use CLOCK_REALTIME.
 663         (__atomic_futex_unsigned_base::_M_futex_wait_until_steady)
 664         (__atomic_futex_unsigned_base::_M_load_and_text_until_steady):
 665         New member functions that use CLOCK_MONOTONIC.
 666         (__atomic_futex_unsigned_base::_M_load_and_test_until_impl)
 667         (__atomic_futex_unsigned_base::_M_load_when_equal_until): Add
 668         overloads that accept a steady_clock time_point and use the
 669         new member functions.
 670         * src/c++11/futex.cc: Include headers required for
 671         clock_gettime.
 672         (futex_clock_monotonic_flag): New constant to tell futex to
 673         use CLOCK_MONOTONIC to match existing futex_clock_realtime_flag.
 674         (futex_clock_monotonic_unavailable): New global to store the
 675         result of trying to use CLOCK_MONOTONIC.
 676         (__atomic_futex_unsigned_base::_M_futex_wait_until_steady): Add
 677         new variant of _M_futex_wait_until that uses CLOCK_MONOTONIC to
 678         support waiting using steady_clock.
 679
 680 2020-09-11  Mike Crowe  <mac@mcrowe.com>
 681
 682         * src/c++11/futex.cc: Add new constants for required futex
 683         flags.  Add futex_clock_realtime_unavailable flag to store
 684         result of trying to use FUTEX_CLOCK_REALTIME.
 685         (__atomic_futex_unsigned_base::_M_futex_wait_until): Try to
 686         use FUTEX_WAIT_BITSET with FUTEX_CLOCK_REALTIME and only
 687         fall back to using gettimeofday and FUTEX_WAIT if that's not
 688         supported.
 689
 690 2020-09-11  Mike Crowe  <mac@mcrowe.com>
 691
 692         * testsuite/30_threads/async/async.cc (test02): Test steady_clock
 693         with std::future::wait_until.
 694         (test03): Add new test templated on clock type waiting for future
 695         associated with async to resolve.
 696         (main): Call test03 to test both system_clock and steady_clock.
 697
 698 2020-09-11  Torbjörn SVENSSON  <torbjorn.svensson@st.com>
 699             Christophe Lyon  <christophe.lyon@linaro.org>
 700
 701         * libsupc++/eh_call.cc: Avoid warning with -fno-exceptions.
 702
 703 2020-09-11  Torbjörn SVENSSON  <torbjorn.svensson@st.com>
 704             Christophe Lyon  <christophe.lyon@linaro.org>
 705
 706         * libsupc++/eh_call.cc: Avoid warning with -fno-exceptions.
 707
 708 2020-09-11  Christophe Lyon  <christophe.lyon@linaro.org>
 709
 710         * include/bits/regex_error.h: Avoid warning with -fno-exceptions.
 711
 712 2020-09-10  Jonathan Wakely  <jwakely@redhat.com>
 713
 714         * include/bits/locale_conv.h (__do_str_codecvt, __str_codecvt_in_all):
 715         Add casts to compare types of the same signedness.
 716
 717 2020-09-10  Jonathan Wakely  <jwakely@redhat.com>
 718
 719         * include/bits/ranges_algobase.h (__equal_fn): Remove unused
 720         typedef.
 721
 722 2020-09-10  Jonathan Wakely  <jwakely@redhat.com>
 723
 724         * include/std/version (__cpp_lib_array_constexpr):
 725         (__cpp_lib_constexpr_char_traits): Only define C++17 value when
 726         compiling C++17.
 727
 728 2020-09-10  Jonathan Wakely  <jwakely@redhat.com>
 729
 730         * include/experimental/bits/shared_ptr.h (shared_ptr(auto_ptr&&))
 731         (operator=(auto_ptr&&)): Add diagnostic pragmas to suppress
 732         warnings for uses of std::auto_ptr.
 733         * include/experimental/type_traits (is_literal_type_v):
 734         Likewise, for use of std::is_literal_type.
 735         * include/std/condition_variable (condition_variable_any::_Unlock):
 736         Likewise, for use of std::uncaught_exception.
 737
 738 2020-09-10  Jonathan Wakely  <jwakely@redhat.com>
 739
 740         * include/bits/fs_path.h (path::_List::type()): Avoid narrowing
 741         conversion.
 742         * include/std/chrono (operator+(const year&, const years&)):
 743         Likewise.
 744
 745 2020-09-10  Jonathan Wakely  <jwakely@redhat.com>
 746
 747         * include/bits/codecvt.h (codecvt_byname): Remove names of
 748         unused parameters.
 749
 750 2020-09-10  Jonathan Wakely  <jwakely@redhat.com>
 751
 752         * include/bits/locale_facets_nonio.tcc: Adjust whitespace.
 753
 754 2020-09-10  Krystian Kuźniarek  <krystian.kuzniarek@gmail.com>
 755
 756         * include/c_global/cmath (__lerp): Avoid -Wparentheses warnings.
 757
 758 2020-09-10  Krystian Kuźniarek  <krystian.kuzniarek@gmail.com>
 759
 760         * include/bits/atomic_base.h: Fix -Wunused-variable
 761         warnings.
 762         * include/ext/new_allocator.h: Fix -Wunused-parameter
 763         warnings.
 764
 765 2020-09-10  Jonathan Wakely  <jwakely@redhat.com>
 766
 767         * include/bits/stl_iterator.h (counted_iterator): Add assertions
 768         to check preconditions added by LWG 3472.
 769
 770 2020-09-10  Jonathan Wakely  <jwakely@redhat.com>
 771
 772         PR libstdc++/94160
 773         * src/c++17/memory_resource.cc (munge_options): Round
 774         max_blocks_per_chunk to a multiple of four.
 775         (__pool_resource::_M_alloc_pools()): Simplify slightly.
 776         * testsuite/20_util/unsynchronized_pool_resource/allocate.cc:
 777         Check that valid pointers are returned when small values are
 778         used for max_blocks_per_chunk.
 779
 780 2020-09-10  Jonathan Wakely  <jwakely@redhat.com>
 781
 782         PR libstdc++/96942
 783         * include/std/memory_resource (monotonic_buffer_resource::do_allocate):
 784         Use __builtin_expect when checking if a new buffer needs to be
 785         allocated from the upstream resource, and for checks for edge
 786         cases like zero sized buffers and allocations.
 787         * src/c++17/memory_resource.cc (aligned_size): New class template.
 788         (aligned_ceil): New helper function to round up to a given
 789         alignment.
 790         (monotonic_buffer_resource::chunk): Replace _M_size and _M_align
 791         with an aligned_size member. Remove _M_canary member. Change _M_next
 792         to pointer instead of unaligned buffer.
 793         (monotonic_buffer_resource::chunk::allocate): Round up to multiple
 794         of 64 instead of to power of two. Check for size overflow. Remove
 795         redundant check for minimum required alignment.
 796         (monotonic_buffer_resource::chunk::release): Adjust for changes
 797         to data members.
 798         (monotonic_buffer_resource::_M_new_buffer): Use aligned_ceil.
 799         (big_block): Replace _M_size and _M_align with aligned_size
 800         member.
 801         (big_block::big_block): Check for size overflow.
 802         (big_block::size, big_block::align): Adjust to use aligned_size.
 803         (big_block::alloc_size): Use aligned_ceil.
 804         (munge_options): Use aligned_ceil.
 805         (__pool_resource::allocate): Use big_block::align for alignment.
 806         * testsuite/20_util/monotonic_buffer_resource/allocate.cc: Check
 807         upstream resource gets expected values for impossible sizes.
 808         * testsuite/20_util/unsynchronized_pool_resource/allocate.cc:
 809         Likewise. Adjust checks for expected alignment in existing test.
 810
 811 2020-09-07  Jonathan Wakely  <jwakely@redhat.com>
 812
 813         * include/std/chrono (duration::_S_gcd): Use invariant that
 814         neither value is zero initially.
 815
 816 2020-09-07  Jonathan Wakely  <jwakely@redhat.com>
 817
 818         * include/std/ranges (__box): Simplify constraints as per LWG 3477.
 819
 820 2020-09-03  Jonathan Wakely  <jwakely@redhat.com>
 821
 822         PR libstdc++/96592
 823         * include/std/tuple (_TupleConstraints<true, T...>): Use
 824         alternative is_constructible instead of std::is_constructible.
 825         * testsuite/20_util/tuple/cons/96592.cc: New test.
 826
 827 2020-09-03  Jonathan Wakely  <jwakely@redhat.com>
 828
 829         * include/std/chrono (duration::_S_gcd): Use iterative algorithm
 830         for C++14 and later.
 831         * include/std/numeric (__detail::__gcd): Replace recursive
 832         Euclidean algorithm with iterative version of binary GCD algorithm.
 833         * testsuite/26_numerics/gcd/1.cc: Test additional inputs.
 834         * testsuite/26_numerics/gcd/gcd_neg.cc: Adjust dg-error lines.
 835         * testsuite/26_numerics/lcm/lcm_neg.cc: Likewise.
 836         * testsuite/experimental/numeric/gcd.cc: Test additional inputs.
 837         * testsuite/26_numerics/gcd/2.cc: New test.
 838
 839 2020-09-02  Jonathan Wakely  <jwakely@redhat.com>
 840
 841         PR libstdc++/92978
 842         * testsuite/experimental/numeric/92978.cc: Use experimental::lcm
 843         not std::lcm.
 844
 845 2020-09-02  Jonathan Wakely  <jwakely@redhat.com>
 846
 847         PR libstdc++/96851
 848         * include/bits/cpp_type_traits.h (__is_memcmp_ordered):
 849         New trait that says if memcmp can be used for ordering.
 850         (__is_memcmp_ordered_with): Likewise, for two types.
 851         * include/bits/deque.tcc (__lex_cmp_dit): Use new traits
 852         instead of __is_byte and __numeric_traits.
 853         (__lexicographical_compare_aux1): Likewise.
 854         * include/bits/ranges_algo.h (__lexicographical_compare_fn):
 855         Likewise.
 856         * include/bits/stl_algobase.h (__lexicographical_compare_aux1)
 857         (__is_byte_iter): Likewise.
 858         * include/std/array (operator<=>): Likewise. Only use memcmp
 859         when std::is_constant_evaluated() is false.
 860         * testsuite/23_containers/array/comparison_operators/96851.cc:
 861         New test.
 862         * testsuite/23_containers/array/tuple_interface/get_neg.cc:
 863         Adjust dg-error line numbers.
 864
 865 2020-09-02  Jonathan Wakely  <jwakely@redhat.com>
 866
 867         * include/bits/stl_iterator.h: Include <bits/exception_defines.h>
 868         for definitions of __try, __catch and __throw_exception_again.
 869         (counted_iterator::operator++(int)): Use __throw_exception_again
 870         instead of throw.
 871         * libsupc++/new: Include <bits/exception.h> not <exception>.
 872         * libsupc++/new_opvnt.cc: Include <bits/exception_defines.h>.
 873         * testsuite/18_support/destroying_delete.cc: Include
 874         <type_traits> for std::is_same_v definition.
 875         * testsuite/20_util/variant/index_type.cc: Qualify size_t.
 876
 877 2020-09-01  Jonathan Wakely  <jwakely@redhat.com>
 878
 879         PR libstdc++/71960
 880         * include/bits/c++config (__glibcxx_assert_impl): Remove
 881         do-while so that uses of the macro need to add it.
 882         (__glibcxx_assert): Rename macro for runtime assertions
 883         to __glibcxx_assert_2.
 884         (__glibcxx_assert_1): Define macro for constexpr assertions.
 885         (__glibcxx_assert): Define macro for constexpr and runtime
 886         assertions.
 887         * include/bits/range_access.h (ranges::advance): Remove
 888         redundant precondition checks during constant evaluation.
 889         * include/parallel/base.h (_GLIBCXX_PARALLEL_ASSERT): Always
 890         use do-while in macro expansion.
 891         * include/std/ranges (iota_view::iota_view(W, B)): Remove
 892         redundant braces.
 893
 894 2020-09-01  Jonathan Wakely  <jwakely@redhat.com>
 895
 896         * include/std/chrono (duration::_S_gcd(intmax_t, intmax_t)):
 897         New helper function for finding GCD of two positive intmax_t
 898         values.
 899         (duration::__divide): New helper alias for dividing one period
 900         by another.
 901         (duration::__is_harmonic): Use __divide not ratio_divide.
 902         (duration(const duration<R2, P2>&)): Require the duration rep
 903         types to be convertible.
 904         * testsuite/20_util/duration/cons/dr2094.cc: New test.
 905         * testsuite/20_util/duration/requirements/reduced_period.cc:
 906         Fix definition of unused member functions in test type.
 907         * testsuite/20_util/duration/requirements/typedefs_neg2.cc:
 908         Adjust expected errors.
 909
 910 2020-08-29  Jonathan Wakely  <jwakely@redhat.com>
 911
 912         * include/std/numeric (__detail::__absu(bool)): Make deleted
 913         function a function template, so it will be chosen for calls
 914         with an explicit template argument list.
 915         * testsuite/26_numerics/gcd/gcd_neg.cc: Add dg-prune-output.
 916         * testsuite/26_numerics/lcm/lcm_neg.cc: Likewise.
 917
 918 2020-08-28  Jonathan Wakely  <jwakely@redhat.com>
 919
 920         * include/std/chrono (common_type): Fix partial specializations
 921         for a single duration type to use the common_type of the rep.
 922         (duration::operator+, duration::operator-): Fix return types
 923         to also use the common_type of the rep.
 924         * testsuite/20_util/duration/requirements/reduced_period.cc:
 925         Check duration using a rep that has common_type specialized.
 926
 927 2020-08-28  Jonathan Wakely  <jwakely@redhat.com>
 928
 929         PR libstdc++/92978
 930         * include/std/numeric (__abs_integral): Replace with ...
 931         (__detail::__absu): New function template that returns an
 932         unsigned type, guaranteeing it can represent the most
 933         negative signed value.
 934         (__detail::__gcd, __detail::__lcm): Require arguments to
 935         be unsigned and therefore already non-negative.
 936         (gcd, lcm): Convert arguments to absolute value as unsigned
 937         type before calling __detail::__gcd or __detail::__lcm.
 938         * include/experimental/numeric (gcd, lcm): Likewise.
 939         * testsuite/26_numerics/gcd/gcd_neg.cc: Adjust expected
 940         errors.
 941         * testsuite/26_numerics/lcm/lcm_neg.cc: Likewise.
 942         * testsuite/26_numerics/gcd/92978.cc: New test.
 943         * testsuite/26_numerics/lcm/92978.cc: New test.
 944         * testsuite/experimental/numeric/92978.cc: New test.
 945
 946 2020-08-27  Jonathan Wakely  <jwakely@redhat.com>
 947
 948         * include/std/chrono (__duration_common_type): Ensure the
 949         reduced ratio is used. Remove unused partial specialization
 950         using __failure_type.
 951         (common_type): Pass reduced ratios to __duration_common_type.
 952         Add partial specializations for simple cases involving a single
 953         duration or time_point type.
 954         (duration::period): Use reduced ratio.
 955         (duration::operator+(), duration::operator-()): Return duration
 956         type using the reduced ratio.
 957         * testsuite/20_util/duration/requirements/typedefs_neg2.cc:
 958         Adjust expected errors.
 959         * testsuite/20_util/duration/requirements/reduced_period.cc: New test.
 960
 961 2020-08-27  Patrick Palka  <ppalka@redhat.com>
 962
 963         * include/std/chrono (year_month::operator+): Properly handle a
 964         month value of 0 by casting the month value to int before
 965         subtracting 1 from it so that the difference is sign-extended in
 966         the subsequent addition.
 967         * testsuite/std/time/year_month/1.cc: Test adding months to a
 968         year_month whose month component is below or above the
 969         normalized range of [1,12].
 970
 971 2020-08-27  Patrick Palka  <ppalka@redhat.com>
 972
 973         * include/std/chrono
 974         (__detail::__months_years_conversion_disambiguator): Define.
 975         (year_month::operator+=): Templatize the 'months'-based overload
 976         so that the 'years'-based overload is selected in case of
 977         equally-ranked implicit conversion sequences to both 'months'
 978         and 'years' from the supplied argument.
 979         (year_month::operator-=): Likewise.
 980         (year_month::operator+): Likewise.
 981         (year_month::operator-): Likewise.
 982         (year_month_day::operator+=): Likewise.
 983         (year_month_day::operator-=): Likewise.
 984         (year_month_day::operator+): Likewise.
 985         (year_month_day::operator-): Likewise.
 986         (year_month_day_last::operator+=): Likewise.
 987         (year_month_day_last::operator-=): Likewise.
 988         (year_month_day_last::operator+): Likewise
 989         (year_month_day_last::operator-): Likewise.
 990         (year_month_day_weekday::operator+=): Likewise
 991         (year_month_day_weekday::operator-=): Likewise.
 992         (year_month_day_weekday::operator+): Likewise.
 993         (year_month_day_weekday::operator-): Likewise.
 994         (year_month_day_weekday_last::operator+=): Likewise
 995         (year_month_day_weekday_last::operator-=): Likewise.
 996         (year_month_day_weekday_last::operator+): Likewise.
 997         (year_month_day_weekday_last::operator-): Likewise.
 998         (testsuite/std/time/year_month/2.cc): New test.
 999         (testsuite/std/time/year_month_day/2.cc): New test.
1000         (testsuite/std/time/year_month_day_last/2.cc): New test.
1001         (testsuite/std/time/year_month_weekday/2.cc): New test.
1002         (testsuite/std/time/year_month_weekday_last/2.cc): New test.
1003         * testsuite/std/time/year_month/2.cc: New file.
1004         * testsuite/std/time/year_month_day/2.cc: New file.
1005         * testsuite/std/time/year_month_day_last/2.cc: New file.
1006         * testsuite/std/time/year_month_weekday/2.cc: New file.
1007         * testsuite/std/time/year_month_weekday_last/2.cc: New file.
1008
1009 2020-08-27  Patrick Palka  <ppalka@redhat.com>
1010
1011         PR libstdc++/95322
1012         * include/std/ranges (transform_view::sentinel::__distance_from):
1013         Give this a deduced return type.
1014         (transform_view::sentinel::operator-): Adjust the return type so
1015         that it's based on the constness of the iterator rather than
1016         that of the sentinel.
1017         * testsuite/std/ranges/adaptors/95322.cc: Refer to LWG 3488.
1018
1019 2020-08-27  Patrick Palka  <ppalka@redhat.com>
1020
1021         * include/std/ranges (elements_view::begin): Adjust constraints.
1022         (elements_view::end): Likewise.
1023         (elements_view::_Sentinel::operator==): Templatize to take both
1024         _Iterator<true> and _Iterator<false>.
1025         (elements_view::_Sentinel::operator-): Likewise.
1026         * testsuite/std/ranges/adaptors/elements.cc: Add testcase for
1027         the example from P1994R1.
1028         * testsuite/std/ranges/adaptors/lwg3406.cc: New test.
1029
1030 2020-08-27  Patrick Palka  <ppalka@redhat.com>
1031
1032         * include/std/ranges (elements_view::end): Replace these two
1033         overloads with four new overloads.
1034         (elements_view::_Iterator::operator==): Remove.
1035         (elements_view::_Iterator::operator-): Likewise.
1036         (elements_view::_Sentinel): Define.
1037
1038 2020-08-26  Jonathan Wakely  <jwakely@redhat.com>
1039
1040         * include/std/tuple (_Tuple_impl): Whitespaces changes for
1041         consistent indentation. Also use __enable_if_t alias template.
1042
1043 2020-08-26  Jonathan Wakely  <jwakely@redhat.com>
1044
1045         PR libstdc++/96803
1046         * include/std/tuple
1047         (_Tuple_impl(allocator_arg_t, Alloc, const _Tuple_impl<U...>&)):
1048         Replace parameter pack with a type parameter and a pack and pass
1049         the first type to __use_alloc.
1050         * testsuite/20_util/tuple/cons/96803.cc: New test.
1051
1052 2020-08-26  Patrick Palka  <ppalka@redhat.com>
1053
1054         * include/std/chrono (year_month_weekday::operator==): Compare
1055         weekday_indexed instead of weekday.
1056         * testsuite/std/time/year_month_weekday/1.cc: Augment testcase.
1057
1058 2020-08-26  Jonathan Wakely  <jwakely@redhat.com>
1059
1060         * include/bits/hashtable_policy.h (_Hash_code_base): Change
1061         index of _Hashtable_ebo_helper base class.
1062         * testsuite/23_containers/unordered_map/dup_types.cc: New test.
1063
1064 2020-08-26  Jonathan Wakely  <jwakely@redhat.com>
1065
1066         PR libstdc++/71960
1067         * include/experimental/string_view (basic_string_view):
1068         Enable debug assertions.
1069         * include/std/string_view (basic_string_view):
1070         Likewise.
1071
1072 2020-08-26  François Dumont  <fdumont@gcc.gnu.org>
1073
1074         * include/bits/hashtable_policy.h (_Hashtable<>): Rename _H1 into _Hash
1075         _H2 into _RangeHash and _Hash into _Unused.
1076         (_Hastable_base<>): Likewise.
1077         (_Map_base<>): Likewise.
1078         (_Insert_base<>): Likewise.
1079         (_Insert<>): Likewise.
1080         (_Rehash_base<>): Likewise.
1081         (_Local_iterator_base<>): Likewise.
1082         (_Hash_code_base<>): Likewise.
1083         (_Hash_code_base<_Key, _Value, _ExtractKey, _H1, _H2, _Hash, false>):
1084         Remove.
1085         (_Hash_code_base<_Key, _Value, _ExtractKey, _H1, _H2, _Hash, true>):
1086         Remove.
1087         (_Hash_code_base<_Key, _Value, _ExtractKey, _Hash, _RangeHas, _Unused,
1088         bool>): Remove _Hashtable_ebo_helper<2, _RangeHash> base type..
1089         (_Hash_code_base<>::_M_bucket_index(const _Key&, __hash_code, size_t)):
1090         Replace by...
1091         (_Hash_code_base<>::_M_bucket_index(__hash_code, size_t)): ...this.
1092         (_Local_iterator<>): Remove _H1 and _H2 template parameters.
1093         (_Local_const_iterator<>): Likewise.
1094         (_Equality<>): Likewise.
1095         (_Map_base<>::operator[](const key_type&): Adapt.
1096         (_Map_base<>::operator[](key_type&&): Adapt.
1097         (_Identity::operator()): Add noexcept.
1098         (_Select1st::operator()): Likewise.
1099         (_Hash_code_base<>): Remove _Hashtable_ebo_helper<0, _ExtractKey> base
1100         type.
1101         (_Hash_code_base::_M_extract): Remove.
1102         * include/bits/hashtable.h (_Hashtable<>): Remove _H1 and _H2 template
1103         parameters. Remove _ExtractKey from constructors.
1104         (_Hashtable<>::_M_insert_unique_node(const key_type&, size_t,
1105         __hash_code, __node_type*, size_t)): Replace by...
1106         (_Hashtable<>::_M_insert_unique_node(size_t, __hash_code,
1107          __node_type*, size_t)): ...this.
1108         (_Hashtable<>::_M_insert_muti_node(__node_type*, const key_type&,
1109         __hash_code, __node_type*)): Replace by...
1110         (_Hashtable<>::_M_insert_multi_node(__node_type*, __hash_code,
1111         __node_type*)): ...this.
1112         (_Hashtable<>::__key_extract): Remove.
1113         * include/bits/node_handle.h: Adapt.
1114
1115 2020-08-25  Jonathan Wakely  <jwakely@redhat.com>
1116
1117         * testsuite/21_strings/debug/iterator_self_move_assign_neg.cc: Removed.
1118         * testsuite/21_strings/debug/self_move_assign_neg.cc: Removed.
1119         * testsuite/23_containers/deque/debug/iterator_self_move_assign_neg.cc: Removed.
1120         * testsuite/23_containers/deque/debug/self_move_assign_neg.cc: Removed.
1121         * testsuite/23_containers/forward_list/debug/iterator_self_move_assign_neg.cc: Removed.
1122         * testsuite/23_containers/forward_list/debug/self_move_assign_neg.cc: Removed.
1123         * testsuite/23_containers/list/debug/iterator_self_move_assign_neg.cc: Removed.
1124         * testsuite/23_containers/list/debug/self_move_assign_neg.cc: Removed.
1125         * testsuite/23_containers/map/debug/iterator_self_move_assign_neg.cc: Removed.
1126         * testsuite/23_containers/map/debug/self_move_assign_neg.cc: Removed.
1127         * testsuite/23_containers/multimap/debug/iterator_self_move_assign_neg.cc: Removed.
1128         * testsuite/23_containers/multimap/debug/self_move_assign_neg.cc: Removed.
1129         * testsuite/23_containers/multiset/debug/iterator_self_move_assign_neg.cc: Removed.
1130         * testsuite/23_containers/multiset/debug/self_move_assign_neg.cc: Removed.
1131         * testsuite/23_containers/set/debug/iterator_self_move_assign_neg.cc: Removed.
1132         * testsuite/23_containers/set/debug/self_move_assign_neg.cc: Removed.
1133         * testsuite/23_containers/unordered_map/debug/iterator_self_move_assign_neg.cc: Removed.
1134         * testsuite/23_containers/unordered_map/debug/self_move_assign_neg.cc: Removed.
1135         * testsuite/23_containers/unordered_multimap/debug/iterator_self_move_assign_neg.cc:
1136         Removed.
1137         * testsuite/23_containers/unordered_multimap/debug/self_move_assign_neg.cc: Removed.
1138         * testsuite/23_containers/unordered_multiset/debug/iterator_self_move_assign_neg.cc:
1139         Removed.
1140         * testsuite/23_containers/unordered_multiset/debug/self_move_assign_neg.cc: Removed.
1141         * testsuite/23_containers/unordered_set/debug/iterator_self_move_assign_neg.cc: Removed.
1142         * testsuite/23_containers/unordered_set/debug/self_move_assign_neg.cc: Removed.
1143         * testsuite/23_containers/vector/debug/iterator_self_move_assign_neg.cc: Removed.
1144         * testsuite/23_containers/vector/debug/self_move_assign_neg.cc: Removed.
1145
1146 2020-08-25  Patrick Palka  <ppalka@redhat.com>
1147
1148         * include/std/chrono (year_month_weekday::ok): Fix assert.
1149
1150 2020-08-25  Jonathan Wakely  <jwakely@redhat.com>
1151
1152         * include/std/future (future, shared_future. promise): Add
1153         is_destructible assertion (LWG 3466). Adjust string-literal for
1154         !is_array and !is_function assertions.
1155         * testsuite/30_threads/future/requirements/lwg3458.cc: Check
1156         types with no accessible destructor. Adjust expected errors.
1157         * testsuite/30_threads/promise/requirements/lwg3466.cc:
1158         Likewise.
1159         * testsuite/30_threads/shared_future/requirements/lwg3458.cc:
1160         Likewise.
1161
1162 2020-08-25  Patrick Palka  <ppalka@redhat.com>
1163             Ed Smith-Rowland  <3dw4rd@verizon.net>
1164             Jonathan Wakely  <jwakely@redhat.com>
1165
1166         * include/std/chrono (time_point::operator++)
1167         (time_point::operator--): Define.
1168         (utc_clock, tai_clock, gps_clock): Forward declare.
1169         (utc_time, utc_seconds, tai_time, tai_seconds, gps_time)
1170         (gps_seconds): Define.
1171         (is_clock<utc_clock>, is_clock<tai_clock>, is_clock<gps_clock>)
1172         (is_clock_v<utc_clock>, is_clock_v<tai_clock>)
1173         (is_clock_v<gps_clock>): Define these specializations.
1174         (leap_second_info): Define.
1175         (day, month, year, weekday, weekday_indexed)
1176         (weekday_last, month_day, month_day_last, month_weekday)
1177         (month_weekday_last, year_month, year_month_day)
1178         (year_month_day_last, year_month_weekday, year_month_weekday_last):
1179         Declare and later define.
1180         (last_spec, last, __detail::__days_per_month)
1181         (__detail::__days_per_month, __detail::__last_day): Define.
1182         (January, February, March, April, May, June, July, August)
1183         (September, October, November, December, Sunday, Monday, Tuesday)
1184         (Wednesday, Thursday, Friday, Saturday): Define.
1185         (weekday::operator[]): Define out-of-line.
1186         (year_month_day::_S_from_days, year_month_day::M_days_since_epoch):
1187         Likewise.
1188         (year_month_day::year_month_day, year_month_day::ok): Likewise.
1189         (__detail::__pow10, hh_mm_ss): Define.
1190         (literals::chrono_literals::operator""d)
1191         (literals::chrono_literals::operator""y): Define.
1192         (is_am, is_pm, make12, make24): Define.
1193         * testsuite/20_util/time_point/4.cc: New test.
1194         * testsuite/std/time/day/1.cc: New test.
1195         * testsuite/std/time/hh_mm_ss/1.cc: New test.
1196         * testsuite/std/time/is_am/1.cc: New test.
1197         * testsuite/std/time/is_pm/1.cc: New test.
1198         * testsuite/std/time/make12/1.cc: New test.
1199         * testsuite/std/time/make24/1.cc: New test.
1200         * testsuite/std/time/month/1.cc: New test.
1201         * testsuite/std/time/month_day/1.cc: New test.
1202         * testsuite/std/time/month_day_last/1.cc: New test.
1203         * testsuite/std/time/month_weekday/1.cc: New test.
1204         * testsuite/std/time/month_weekday_last/1.cc: New test.
1205         * testsuite/std/time/weekday/1.cc: New test.
1206         * testsuite/std/time/weekday_indexed/1.cc: New test.
1207         * testsuite/std/time/weekday_last/1.cc: New test.
1208         * testsuite/std/time/year/1.cc: New test.
1209         * testsuite/std/time/year_month/1.cc: New test.
1210         * testsuite/std/time/year_month_day/1.cc: New test.
1211         * testsuite/std/time/year_month_day_last/1.cc: New test.
1212         * testsuite/std/time/year_month_weekday/1.cc: New test.
1213         * testsuite/std/time/year_month_weekday_last/1.cc: New test.
1214
1215 2020-08-24  Jonathan Wakely  <jwakely@redhat.com>
1216
1217         * include/std/ranges (join_view): Add deduction guide (LWG 3474).
1218         * testsuite/std/ranges/adaptors/join_lwg3474.cc: New test.
1219
1220 2020-08-24  Jonathan Wakely  <jwakely@redhat.com>
1221
1222         * include/bits/iterator_concepts.h (indirectly_readable): Add
1223         partial specializations to resolve ambiguities (LWG 3446).
1224         * testsuite/24_iterators/associated_types/readable.traits.cc:
1225         Check types with both value_type and element_type.
1226
1227 2020-08-24  Jonathan Wakely  <jwakely@redhat.com>
1228
1229         * include/std/ranges (ranges::iota_view::size()): Perform all
1230         calculations in the right unsigned types.
1231         * testsuite/std/ranges/iota/size.cc: New test.
1232
1233 2020-08-24  Jonathan Wakely  <jwakely@redhat.com>
1234
1235         PR libstdc++/96766
1236         * include/std/variant (_Variant_storage): Replace implicit
1237         conversions from size_t to __index_type with explicit casts.
1238
1239 2020-08-24  Jonathan Wakely  <jwakely@redhat.com>
1240
1241         * testsuite/30_threads/packaged_task/cons/alloc.cc: Run for
1242         C++11 and skip for C++17 or later.
1243
1244 2020-08-24  Corentin Gay  <gay@adacore.com>
1245
1246         * testsuite/20_util/shared_ptr/atomic/3.cc: Do not require POSIX
1247         threads and add -pthread only on targets supporting them.
1248         * testsuite/20_util/shared_ptr/thread/default_weaktoshared.cc:
1249         Likewise.
1250         * testsuite/20_util/shared_ptr/thread/mutex_weaktoshared.cc:
1251         Likewise.
1252         * testsuite/30_threads/async/42819.cc: Likewise.
1253         * testsuite/30_threads/async/49668.cc: Likewise.
1254         * testsuite/30_threads/async/54297.cc: Likewise.
1255         * testsuite/30_threads/async/any.cc: Likewise.
1256         * testsuite/30_threads/async/async.cc: Likewise.
1257         * testsuite/30_threads/async/except.cc: Likewise.
1258         * testsuite/30_threads/async/launch.cc: Likewise.
1259         * testsuite/30_threads/async/lwg2021.cc: Likewise.
1260         * testsuite/30_threads/async/sync.cc: Likewise. : Likewise.
1261         * testsuite/30_threads/call_once/39909.cc: Likewise.
1262         * testsuite/30_threads/call_once/49668.cc: Likewise.
1263         * testsuite/30_threads/call_once/60497.cc: Likewise.
1264         * testsuite/30_threads/call_once/call_once1.cc: Likewise.
1265         * testsuite/30_threads/call_once/dr2442.cc: Likewise.
1266         * testsuite/30_threads/condition_variable/54185.cc: Likewise.
1267         * testsuite/30_threads/condition_variable/cons/1.cc: Likewise.
1268         * testsuite/30_threads/condition_variable/members/1.cc: Likewise.
1269         * testsuite/30_threads/condition_variable/members/2.cc: Likewise.
1270         * testsuite/30_threads/condition_variable/members/3.cc: Likewise.
1271         * testsuite/30_threads/condition_variable/members/53841.cc: Likewise.
1272         * testsuite/30_threads/condition_variable/members/68519.cc: Likewise.
1273         * testsuite/30_threads/condition_variable/native_handle/typesizes.cc:
1274         Likewise.
1275         * testsuite/30_threads/condition_variable_any/50862.cc: Likewise.
1276         * testsuite/30_threads/condition_variable_any/53830.cc: Likewise.
1277         * testsuite/30_threads/condition_variable_any/cond.cc: Likewise.
1278         * testsuite/30_threads/condition_variable_any/cons/1.cc: Likewise.
1279         * testsuite/30_threads/condition_variable_any/members/1.cc: Likewise.
1280         * testsuite/30_threads/condition_variable_any/members/2.cc: Likewise.
1281         * testsuite/30_threads/future/cons/move.cc: Likewise.
1282         * testsuite/30_threads/future/members/45133.cc: Likewise.
1283         * testsuite/30_threads/future/members/get.cc: Likewise.
1284         * testsuite/30_threads/future/members/get2.cc: Likewise.
1285         * testsuite/30_threads/future/members/share.cc: Likewise.
1286         * testsuite/30_threads/future/members/valid.cc: Likewise.
1287         * testsuite/30_threads/future/members/wait.cc: Likewise.
1288         * testsuite/30_threads/future/members/wait_for.cc: Likewise.
1289         * testsuite/30_threads/future/members/wait_until.cc: Likewise.
1290         * testsuite/30_threads/lock/1.cc: Likewise.
1291         * testsuite/30_threads/lock/2.cc: Likewise.
1292         * testsuite/30_threads/lock/3.cc: Likewise.
1293         * testsuite/30_threads/lock/4.cc: Likewise.
1294         * testsuite/30_threads/mutex/cons/1.cc: Likewise.
1295         * testsuite/30_threads/mutex/dest/destructor_locked.cc: Likewise.
1296         * testsuite/30_threads/mutex/lock/1.cc: Likewise.
1297         * testsuite/30_threads/mutex/native_handle/1.cc: Likewise.
1298         * testsuite/30_threads/mutex/native_handle/typesizes.cc: Likewise.
1299         * testsuite/30_threads/mutex/try_lock/1.cc: Likewise.
1300         * testsuite/30_threads/mutex/try_lock/2.cc: Likewise.
1301         * testsuite/30_threads/mutex/unlock/1.cc: Likewise.
1302         * testsuite/30_threads/mutex/unlock/2.cc: Likewise.
1303         * testsuite/30_threads/packaged_task/49668.cc: Likewise.
1304         * testsuite/30_threads/packaged_task/60564.cc: Likewise.
1305         * testsuite/30_threads/packaged_task/cons/1.cc: Likewise.
1306         * testsuite/30_threads/packaged_task/cons/2.cc: Likewise.
1307         * testsuite/30_threads/packaged_task/cons/3.cc: Likewise.
1308         * testsuite/30_threads/packaged_task/cons/56492.cc: Likewise.
1309         * testsuite/30_threads/packaged_task/cons/alloc.cc: Likewise.
1310         * testsuite/30_threads/packaged_task/cons/move.cc: Likewise.
1311         * testsuite/30_threads/packaged_task/cons/move_assign.cc: Likewise.
1312         * testsuite/30_threads/packaged_task/members/at_thread_exit.cc:
1313         Likewise.
1314         * testsuite/30_threads/packaged_task/members/get_future.cc: Likewise.
1315         * testsuite/30_threads/packaged_task/members/get_future2.cc: Likewise.
1316         * testsuite/30_threads/packaged_task/members/invoke.cc: Likewise.
1317         * testsuite/30_threads/packaged_task/members/invoke2.cc: Likewise.
1318         * testsuite/30_threads/packaged_task/members/invoke3.cc: Likewise.
1319         * testsuite/30_threads/packaged_task/members/invoke4.cc: Likewise.
1320         * testsuite/30_threads/packaged_task/members/invoke5.cc: Likewise.
1321         * testsuite/30_threads/packaged_task/members/reset.cc: Likewise.
1322         * testsuite/30_threads/packaged_task/members/reset2.cc: Likewise.
1323         * testsuite/30_threads/packaged_task/members/swap.cc: Likewise.
1324         * testsuite/30_threads/packaged_task/members/valid.cc: Likewise.
1325         * testsuite/30_threads/promise/60966.cc: Likewise.
1326         * testsuite/30_threads/promise/cons/1.cc: Likewise.
1327         * testsuite/30_threads/promise/cons/alloc.cc: Likewise.
1328         * testsuite/30_threads/promise/cons/move.cc: Likewise.
1329         * testsuite/30_threads/promise/cons/move_assign.cc: Likewise.
1330         * testsuite/30_threads/promise/members/at_thread_exit.cc: Likewise.
1331         * testsuite/30_threads/promise/members/at_thread_exit2.cc: Likewise.
1332         * testsuite/30_threads/promise/members/get_future.cc: Likewise.
1333         * testsuite/30_threads/promise/members/get_future2.cc: Likewise.
1334         * testsuite/30_threads/promise/members/set_exception.cc: Likewise.
1335         * testsuite/30_threads/promise/members/set_exception2.cc: Likewise.
1336         * testsuite/30_threads/promise/members/set_value.cc: Likewise.
1337         * testsuite/30_threads/promise/members/set_value2.cc: Likewise.
1338         * testsuite/30_threads/promise/members/set_value3.cc: Likewise.
1339         * testsuite/30_threads/promise/members/swap.cc: Likewise.
1340         * testsuite/30_threads/recursive_mutex/cons/1.cc: Likewise.
1341         * testsuite/30_threads/recursive_mutex/dest/destructor_locked.cc:
1342         Likewise.
1343         * testsuite/30_threads/recursive_mutex/lock/1.cc: Likewise.
1344         * testsuite/30_threads/recursive_mutex/native_handle/1.cc: Likewise.
1345         * testsuite/30_threads/recursive_mutex/native_handle/typesizes.cc:
1346         Likewise.
1347         * testsuite/30_threads/recursive_mutex/try_lock/1.cc: Likewise.
1348         * testsuite/30_threads/recursive_mutex/try_lock/2.cc: Likewise.
1349         * testsuite/30_threads/recursive_mutex/unlock/1.cc: Likewise.
1350         * testsuite/30_threads/recursive_mutex/unlock/2.cc: Likewise.
1351         * testsuite/30_threads/recursive_timed_mutex/cons/1.cc: Likewise.
1352         * testsuite/30_threads/recursive_timed_mutex/dest/destructor_locked.cc:
1353         Likewise.
1354         * testsuite/30_threads/recursive_timed_mutex/lock/1.cc: Likewise.
1355         * testsuite/30_threads/recursive_timed_mutex/lock/2.cc: Likewise.
1356         * testsuite/30_threads/recursive_timed_mutex/native_handle/1.cc:
1357         Likewise.
1358         * testsuite/30_threads/recursive_timed_mutex/native_handle/typesizes.cc:
1359         Likewise.
1360         * testsuite/30_threads/recursive_timed_mutex/try_lock/1.cc: Likewise.
1361         * testsuite/30_threads/recursive_timed_mutex/try_lock/2.cc: Likewise.
1362         * testsuite/30_threads/recursive_timed_mutex/try_lock_for/1.cc:
1363         Likewise.
1364         * testsuite/30_threads/recursive_timed_mutex/try_lock_for/2.cc:
1365         Likewise.
1366         * testsuite/30_threads/recursive_timed_mutex/try_lock_for/3.cc:
1367         Likewise.
1368         * testsuite/30_threads/recursive_timed_mutex/try_lock_until/1.cc:
1369         Likewise.
1370         * testsuite/30_threads/recursive_timed_mutex/try_lock_until/2.cc:
1371         Likewise.
1372         * testsuite/30_threads/recursive_timed_mutex/unlock/1.cc: Likewise.
1373         * testsuite/30_threads/recursive_timed_mutex/unlock/2.cc: Likewise.
1374         * testsuite/30_threads/shared_future/cons/move.cc: Likewise.
1375         * testsuite/30_threads/shared_future/members/45133.cc: Likewise.
1376         * testsuite/30_threads/shared_future/members/get.cc: Likewise.
1377         * testsuite/30_threads/shared_future/members/get2.cc: Likewise.
1378         * testsuite/30_threads/shared_future/members/valid.cc: Likewise.
1379         * testsuite/30_threads/shared_future/members/wait.cc: Likewise.
1380         * testsuite/30_threads/shared_future/members/wait_for.cc: Likewise.
1381         * testsuite/30_threads/shared_future/members/wait_until.cc: Likewise.
1382         * testsuite/30_threads/shared_lock/cons/1.cc: Likewise.
1383         * testsuite/30_threads/shared_lock/cons/2.cc: Likewise.
1384         * testsuite/30_threads/shared_lock/cons/3.cc: Likewise.
1385         * testsuite/30_threads/shared_lock/cons/4.cc: Likewise.
1386         * testsuite/30_threads/shared_lock/cons/5.cc: Likewise.
1387         * testsuite/30_threads/shared_lock/cons/6.cc: Likewise.
1388         * testsuite/30_threads/shared_lock/locking/1.cc: Likewise.
1389         * testsuite/30_threads/shared_lock/locking/2.cc: Likewise.
1390         * testsuite/30_threads/shared_lock/locking/3.cc: Likewise.
1391         * testsuite/30_threads/shared_lock/locking/4.cc: Likewise.
1392         * testsuite/30_threads/shared_lock/modifiers/1.cc: Likewise.
1393         * testsuite/30_threads/shared_mutex/cons/1.cc: Likewise.
1394         * testsuite/30_threads/shared_mutex/try_lock/1.cc: Likewise.
1395         * testsuite/30_threads/shared_mutex/try_lock/2.cc: Likewise.
1396         * testsuite/30_threads/shared_mutex/unlock/1.cc: Likewise.
1397         * testsuite/30_threads/shared_timed_mutex/cons/1.cc: Likewise.
1398         * testsuite/30_threads/shared_timed_mutex/try_lock/1.cc: Likewise.
1399         * testsuite/30_threads/shared_timed_mutex/try_lock/2.cc: Likewise.
1400         * testsuite/30_threads/shared_timed_mutex/try_lock/3.cc: Likewise.
1401         * testsuite/30_threads/shared_timed_mutex/unlock/1.cc: Likewise.
1402         * testsuite/30_threads/this_thread/1.cc: Likewise.
1403         * testsuite/30_threads/this_thread/sleep_for-mt.cc: Likewise.
1404         * testsuite/30_threads/this_thread/sleep_until-mt.cc: Likewise.
1405         * testsuite/30_threads/thread/cons/1.cc: Likewise.
1406         * testsuite/30_threads/thread/cons/2.cc: Likewise.
1407         * testsuite/30_threads/thread/cons/3.cc: Likewise.
1408         * testsuite/30_threads/thread/cons/4.cc: Likewise.
1409         * testsuite/30_threads/thread/cons/49668.cc: Likewise.
1410         * testsuite/30_threads/thread/cons/5.cc: Likewise.
1411         * testsuite/30_threads/thread/cons/6.cc: Likewise.
1412         * testsuite/30_threads/thread/cons/7.cc: Likewise.
1413         * testsuite/30_threads/thread/cons/8.cc: Likewise.
1414         * testsuite/30_threads/thread/cons/9.cc: Likewise.
1415         * testsuite/30_threads/thread/cons/moveable.cc: Likewise.
1416         * testsuite/30_threads/thread/cons/terminate.cc: Likewise.
1417         * testsuite/30_threads/thread/members/1.cc: Likewise.
1418         * testsuite/30_threads/thread/members/2.cc: Likewise.
1419         * testsuite/30_threads/thread/members/3.cc: Likewise.
1420         * testsuite/30_threads/thread/members/4.cc: Likewise.
1421         * testsuite/30_threads/thread/members/5.cc: Likewise.
1422         * testsuite/30_threads/thread/members/hardware_concurrency.cc:
1423         Likewise.
1424         * testsuite/30_threads/thread/native_handle/typesizes.cc: Likewise.
1425         * testsuite/30_threads/thread/swap/1.cc: Likewise.
1426         * testsuite/30_threads/timed_mutex/cons/1.cc: Likewise.
1427         * testsuite/30_threads/timed_mutex/dest/destructor_locked.cc:
1428         Likewise.
1429         * testsuite/30_threads/timed_mutex/lock/1.cc: Likewise.
1430         * testsuite/30_threads/timed_mutex/native_handle/1.cc: Likewise.
1431         * testsuite/30_threads/timed_mutex/native_handle/typesizes.cc:
1432         Likewise.
1433         * testsuite/30_threads/timed_mutex/try_lock/1.cc: Likewise.
1434         * testsuite/30_threads/timed_mutex/try_lock/2.cc: Likewise.
1435         * testsuite/30_threads/timed_mutex/try_lock_for/1.cc: Likewise.
1436         * testsuite/30_threads/timed_mutex/try_lock_for/2.cc: Likewise.
1437         * testsuite/30_threads/timed_mutex/try_lock_for/3.cc: Likewise.
1438         * testsuite/30_threads/timed_mutex/try_lock_until/1.cc: Likewise.
1439         * testsuite/30_threads/timed_mutex/try_lock_until/2.cc: Likewise.
1440         * testsuite/30_threads/timed_mutex/try_lock_until/57641.cc: Likewise.
1441         * testsuite/30_threads/timed_mutex/unlock/1.cc: Likewise.
1442         * testsuite/30_threads/timed_mutex/unlock/2.cc: Likewise.
1443         * testsuite/30_threads/try_lock/1.cc: Likewise.
1444         * testsuite/30_threads/try_lock/2.cc: Likewise.
1445         * testsuite/30_threads/try_lock/3.cc: Likewise.
1446         * testsuite/30_threads/try_lock/4.cc: Likewise.
1447         * testsuite/30_threads/unique_lock/cons/1.cc: Likewise.
1448         * testsuite/30_threads/unique_lock/cons/2.cc: Likewise.
1449         * testsuite/30_threads/unique_lock/cons/3.cc: Likewise.
1450         * testsuite/30_threads/unique_lock/cons/4.cc: Likewise.
1451         * testsuite/30_threads/unique_lock/cons/5.cc: Likewise.
1452         * testsuite/30_threads/unique_lock/cons/6.cc: Likewise.
1453         * testsuite/30_threads/unique_lock/locking/1.cc: Likewise.
1454         * testsuite/30_threads/unique_lock/locking/2.cc: Likewise.
1455         * testsuite/30_threads/unique_lock/locking/3.cc: Likewise.
1456         * testsuite/30_threads/unique_lock/locking/4.cc: Likewise.
1457         * testsuite/30_threads/unique_lock/modifiers/1.cc: Likewise.
1458
1459 2020-08-21  Jonathan Wakely  <jwakely@redhat.com>
1460
1461         PR libstdc++/96736
1462         * testsuite/17_intro/headers/c++1998/all_attributes.cc: Do not
1463         test "cold" on darwin.
1464         * testsuite/17_intro/headers/c++2011/all_attributes.cc:
1465         Likewise.
1466         * testsuite/17_intro/headers/c++2014/all_attributes.cc:
1467         Likewise.
1468         * testsuite/17_intro/headers/c++2017/all_attributes.cc:
1469         Likewise.
1470         * testsuite/17_intro/headers/c++2020/all_attributes.cc:
1471         Likewise.
1472
1473 2020-08-21  Jonathan Wakely  <jwakely@redhat.com>
1474
1475         PR libstdc++/96718
1476         * testsuite/25_algorithms/pstl/feature_test-2.cc: Require
1477         tbb-backend effective target.
1478         * testsuite/25_algorithms/pstl/feature_test-3.cc: Likewise.
1479         * testsuite/25_algorithms/pstl/feature_test-5.cc: Likewise.
1480         * testsuite/25_algorithms/pstl/feature_test.cc: Likewise.
1481
1482 2020-08-20  Jonathan Wakely  <jwakely@redhat.com>
1483
1484         * include/bits/iterator_concepts.h [__STRICT_ANSI__]
1485         (incrementable_traits<__int128>): Define specialization.
1486         (incrementable_traits<unsigned __int128>): Likewise.
1487         * testsuite/std/ranges/iota/96042.cc: Test iota_view with
1488         __int128.
1489
1490 2020-08-19  Jonathan Wakely  <jwakely@redhat.com>
1491             Patrick Palka  <ppalka@redhat.com>
1492
1493         PR libstdc++/96042
1494         * include/bits/range_access.h (__detail::__to_unsigned_like):
1495         Do not use make_unsigned_t<T> in the return type, as it can
1496         result in an error before the integral<T> constraint is checked.
1497         [__STRICT_ANSI__]: Add overloads for 128-bit integer types.
1498         (__detail::__make_unsigned_like_t): Define as the return type
1499         of __to_unsigned_like.
1500         * testsuite/std/ranges/subrange/96042.cc: New test.
1501
1502 2020-08-19  Jonathan Wakely  <jwakely@redhat.com>
1503
1504         * include/bits/stl_tree.h (operator!=, operator>, operator<=)
1505         (operator>=): Remove deprecated functions.
1506
1507 2020-08-19  Jonathan Wakely  <jwakely@redhat.com>
1508
1509         PR libstdc++/96042
1510         * include/ext/numeric_traits.h (__is_integer_nonstrict): New
1511         trait which is true for 128-bit integers even in strict modes.
1512         (__numeric_traits_integer, __numeric_traits): Use
1513         __is_integer_nonstrict instead of __is_integer.
1514         * include/std/limits [__STRICT_ANSI__ && __SIZEOF_INT128__]
1515         (numeric_limits<__int128>, (numeric_limits<unsigned __int128>):
1516         Define.
1517         * testsuite/std/ranges/iota/96042.cc: New test.
1518
1519 2020-08-19  Jonathan Wakely  <jwakely@redhat.com>
1520
1521         * include/bits/c++config (_GLIBCXX_DEPRECATED_SUGGEST)
1522         (_GLIBCXX11_DEPRECATED, _GLIBCXX11_DEPRECATED_SUGGEST)
1523         (_GLIBCXX17_DEPRECATED_SUGGEST, _GLIBCXX20_DEPRECATED_SUGGEST):
1524         Add new macros to comment.
1525
1526 2020-08-19  Patrick Palka  <ppalka@redhat.com>
1527
1528         * include/Makefile.am (bits_headers): Add new header
1529         <bits/max_size_type.h>.
1530         * include/Makefile.in: Regenerate.
1531         * include/bits/iterator_concepts.h
1532         (ranges::__detail::__max_diff_type): Remove definition, replace
1533         with forward declaration of class __max_diff_type.
1534         (__detail::__max_size_type): Remove definition, replace with
1535         forward declaration of class __max_size_type.
1536         (__detail::__is_unsigned_int128, __is_signed_int128)
1537         (__is_int128): New concepts.
1538         (__detail::__is_integer_like): Accept __int128 and unsigned
1539         __int128.
1540         (__detail::__is_signed_integer_like): Accept __int128.
1541         * include/bits/max_size_type.h: New header.
1542         * include/bits/range_access.h: Include <bits/max_size_type.h>.
1543         (__detail::__to_unsigned_like): Two new overloads.
1544         * testsuite/std/ranges/iota/difference_type.cc: New test.
1545         * testsuite/std/ranges/iota/max_size_type.cc: New test.
1546
1547 2020-08-19  Jonathan Wakely  <jwakely@redhat.com>
1548
1549         * include/bits/c++config (_GLIBCXX_DEPRECATED): Define for all
1550         standard modes.
1551         (_GLIBCXX_DEPRECATED_SUGGEST): New macro for "use 'foo' instead"
1552         message in deprecated warnings.
1553         (_GLIBCXX11_DEPRECATED, _GLIBCXX11_DEPRECATED_SUGGEST): New
1554         macros for marking features deprecated in C++11.
1555         (_GLIBCXX17_DEPRECATED_SUGGEST, _GLIBCXX20_DEPRECATED_SUGGEST):
1556         New macros.
1557         * include/backward/auto_ptr.h (auto_ptr_ref, auto_ptr<void>):
1558         Use _GLIBCXX11_DEPRECATED instead of _GLIBCXX_DEPRECATED.
1559         (auto_ptr): Use _GLIBCXX11_DEPRECATED_SUGGEST.
1560         * include/backward/binders.h (binder1st, binder2nd): Likewise.
1561         * include/bits/ios_base.h (io_state, open_mode, seek_dir)
1562         (streampos, streamoff): Use _GLIBCXX_DEPRECATED_SUGGEST.
1563         * include/std/streambuf (stossc): Replace C++11 attribute
1564         with _GLIBCXX_DEPRECATED_SUGGEST.
1565         * include/std/type_traits (__is_nullptr_t): Use
1566         _GLIBCXX_DEPRECATED_SUGGEST instead of _GLIBCXX_DEPRECATED.
1567         * testsuite/27_io/types/1.cc: Check for deprecated warnings.
1568         Also check for io_state, open_mode and seek_dir typedefs.
1569
1570 2020-08-19  Antony Polukhin  <antoshkka@gmail.com>
1571
1572         PR libstdc++/71579
1573         * include/std/type_traits (invoke_result, is_nothrow_invocable_r)
1574         Add static_asserts to make sure that the argument of the type
1575         trait is not misused with incomplete types.
1576         (is_swappable_with, is_nothrow_swappable_with): Add static_asserts
1577         to make sure that the first and second arguments of the type trait
1578         are not misused with incomplete types.
1579         * testsuite/20_util/invoke_result/incomplete_neg.cc: New test.
1580         * testsuite/20_util/is_nothrow_invocable/incomplete_neg.cc: New test.
1581         * testsuite/20_util/is_nothrow_swappable/incomplete_neg.cc: New test.
1582         * testsuite/20_util/is_nothrow_swappable_with/incomplete_neg.cc: New
1583         test.
1584         * testsuite/20_util/is_swappable_with/incomplete_neg.cc: New test.
1585
1586 2020-08-18  David Edelsohn  <dje.gcc@gmail.com>
1587             Clement Chigot  <clement.chigot@atos.net>
1588
1589         * config/os/aix/t-aix: Add complementary mode object files to
1590         libsupc++.a
1591
1592 2020-08-18  Jonathan Wakely  <jwakely@redhat.com>
1593
1594         * testsuite/17_intro/headers/c++1998/all_attributes.cc: Check
1595         "cold" isn't used in the library. Also check <cxxabi.h>.
1596         * testsuite/17_intro/headers/c++2011/all_attributes.cc:
1597         Likewise.
1598         * testsuite/17_intro/headers/c++2014/all_attributes.cc:
1599         Likewise.
1600         * testsuite/17_intro/headers/c++2017/all_attributes.cc:
1601         Likewise.
1602         * testsuite/17_intro/headers/c++2020/all_attributes.cc:
1603         Likewise.
1604
1605 2020-08-18  Jonathan Wakely  <jwakely@redhat.com>
1606
1607         PR libstdc++/69724
1608         * include/std/future (__future_base::_S_make_deferred_state)
1609         (__future_base::_S_make_async_state): Remove.
1610         (__future_base::_Deferred_state): Change constructor to accept a
1611         parameter pack of arguments and forward them to the call
1612         wrapper.
1613         (__future_base::_Async_state_impl): Likewise. Replace lambda
1614         expression with a named member function.
1615         (async): Construct state object directly from the arguments,
1616         instead of using thread::__make_invoker, _S_make_deferred_state
1617         and _S_make_async_state. Move shared state into the returned
1618         future.
1619         * include/std/thread (thread::_Call_wrapper): New alias
1620         template for use by constructor and std::async.
1621         (thread::thread(Callable&&, Args&&...)): Create state object
1622         directly instead of using _S_make_state.
1623         (thread::__make_invoker, thread::__decayed_tuple)
1624         (thread::_S_make_state): Remove.
1625         * testsuite/30_threads/async/69724.cc: New test.
1626
1627 2020-08-17  Jonathan Wakely  <jwakely@redhat.com>
1628
1629         PR libstdc++/55713
1630         PR libstdc++/71096
1631         PR libstdc++/93147
1632         * include/std/tuple [__has_cpp_attribute(no_unique_address)]
1633         (_Head_base<Idx, Head, true>): New definition of the partial
1634         specialization, using [[no_unique_address]] instead of
1635         inheritance.
1636         * testsuite/libstdc++-prettyprinters/48362.cc: Adjust expected
1637         output.
1638         * testsuite/20_util/tuple/comparison_operators/93147.cc: New test.
1639         * testsuite/20_util/tuple/creation_functions/55713.cc: New test.
1640         * testsuite/20_util/tuple/element_access/71096.cc: New test.
1641
1642 2020-08-14  Lewis Hyatt  <lhyatt@gmail.com>
1643
1644         * testsuite/lib/libstdc++.exp: Use the new option
1645         -fdiagnostics-plain-output.
1646
1647 2020-08-13  Jonathan Wakely  <jwakely@redhat.com>
1648
1649         * acinclude.m4 (GLIBCXX_ENABLE_CHEADERS): Warn if the c_std
1650         option is used and fail unless --enable-cheaders-obsolete is
1651         also used.
1652         * configure: Regenerate.
1653
1654 2020-08-12  Jonathan Wakely  <jwakely@redhat.com>
1655
1656         PR libstdc++/85828
1657         * include/bits/basic_string.h (operator=(basic_string&&)): Check
1658         for self-move before copying with char_traits::copy.
1659         * include/bits/hashtable.h (operator=(_Hashtable&&)): Check for
1660         self-move.
1661         * include/bits/stl_deque.h (_M_move_assign1(deque&&, false_type)):
1662         Check for equal allocators.
1663         * include/bits/stl_list.h (_M_move_assign(list&&, true_type)):
1664         Call clear() instead of _M_clear().
1665         * include/debug/formatter.h (__msg_self_move_assign): Change
1666         comment.
1667         * include/debug/macros.h (__glibcxx_check_self_move_assign):
1668         (_GLIBCXX_DEBUG_VERIFY): Remove.
1669         * include/debug/safe_container.h (operator=(_Safe_container&&)):
1670         Remove assertion check for safe move and make it well-defined.
1671         * include/debug/safe_iterator.h (operator=(_Safe_iterator&&)):
1672         Remove assertion check for self-move.
1673         * include/debug/safe_local_iterator.h
1674         (operator=(_Safe_local_iterator&&)): Likewise.
1675         * testsuite/21_strings/basic_string/cons/char/self_move.cc: New test.
1676         * testsuite/23_containers/deque/cons/self_move.cc: New test.
1677         * testsuite/23_containers/forward_list/cons/self_move.cc: New test.
1678         * testsuite/23_containers/list/cons/self_move.cc: New test.
1679         * testsuite/23_containers/set/cons/self_move.cc: New test.
1680         * testsuite/23_containers/unordered_set/cons/self_move.cc: New test.
1681         * testsuite/23_containers/vector/cons/self_move.cc: New test.
1682
1683 2020-08-11  François Dumont  <fdumont@gcc.gnu.org>
1684
1685         PR libstdc++/91620
1686         * include/bits/forward_list.tcc (forward_list<>::remove): Collect nodes
1687         to destroy in an intermediate forward_list.
1688         (forward_list<>::remove_if, forward_list<>::unique): Likewise.
1689         * include/bits/list.tcc (list<>::remove, list<>::unique): Likewise.
1690         (list<>::remove_if): Likewise.
1691         * include/debug/forward_list (forward_list<>::_M_erase_after): Remove.
1692         (forward_list<>::erase_after): Adapt.
1693         (forward_list<>::remove, forward_list<>::remove_if): Collect nodes to
1694         destroy in an intermediate forward_list.
1695         (forward_list<>::unique): Likewise.
1696         * include/debug/list (list<>::remove, list<>::unique): Likewise.
1697         (list<>::remove_if): Likewise.
1698         * testsuite/23_containers/forward_list/operations/91620.cc: New test.
1699         * testsuite/23_containers/list/operations/91620.cc: New test.
1700
1701 2020-08-11  Jonathan Wakely  <jwakely@redhat.com>
1702
1703         * testsuite/30_threads/thread/cons/84535.cc: Use a custom
1704         namespace.
1705         * testsuite/30_threads/thread/cons/lwg2097.cc: Likewise.
1706
1707 2020-08-11  Jonathan Wakely  <jwakely@redhat.com>
1708
1709         PR libstdc++/89760
1710         * include/experimental/executor [!_GLIBCXX_HAS_GTHREADS]:
1711         (execution_context::mutex_type): Define dummy mutex type.
1712         (system_context): Use execution_context::mutex_type.
1713         (system_context) [!_GLIBCXX_HAS_GTHREADS]: Define dummy
1714         thread and condition variable types.
1715         [!_GLIBCXX_HAS_GTHREADS] (system_context::_M_run()): Do not
1716         define.
1717         (system_context::_M_post) [!_GLIBCXX_HAS_GTHREADS]: Throw
1718         an exception when threads aren't available.
1719         (strand::running_in_this_thread()): Defer to _M_state.
1720         (strand::_State::running_in_this_thread()): New function.
1721         (use_future_t): Do not depend on _GLIBCXX_USE_C99_STDINT_TR1.
1722         * include/experimental/io_context (io_context): Use the
1723         execution_context::mutex_type alias. Replace stack of thread
1724         IDs with counter.
1725         * testsuite/experimental/net/execution_context/use_service.cc:
1726         Enable test for non-pthread targets.
1727
1728 2020-08-11  Jonathan Wakely  <jwakely@redhat.com>
1729
1730         * include/experimental/executor (system_context::a__tag): Make
1731         default constructor explicit.
1732
1733 2020-08-11  Jonathan Wakely  <jwakely@redhat.com>
1734
1735         * include/experimental/executor (system_context::_M_run()):
1736         Fix predicate.
1737         * testsuite/experimental/net/system_context/1.cc: New test.
1738
1739 2020-08-11  Jonathan Wakely  <jwakely@redhat.com>
1740
1741         * include/std/stop_token: Check _GLIBCXX_HAS_GTHREADS using
1742         #ifdef instead of #if.
1743         (stop_token::_S_yield()): Check _GLIBCXX_HAS_GTHREADS before
1744         using __gthread_yield.
1745
1746 2020-08-11  Jonathan Wakely  <jwakely@redhat.com>
1747
1748         * include/std/thread [!_GLIBCXX_HAS_GTHREADS] (this_thread::yield)
1749         (this_thread::sleep_until): Define.
1750         [!_GLIBCXX_HAS_GTHREADS] (this_thread::sleep_for): Define. Replace
1751         use of __gthread_time_t typedef with timespec.
1752         * src/c++11/thread.cc [!_GLIBCXX_HAS_GTHREADS] (__sleep_for):
1753         Likewise.
1754         * testsuite/30_threads/this_thread/2.cc: Moved to...
1755         * testsuite/30_threads/this_thread/yield.cc: ...here.
1756         * testsuite/30_threads/this_thread/3.cc: Moved to...
1757         * testsuite/30_threads/this_thread/sleep_for-mt.cc: ...here.
1758         * testsuite/30_threads/this_thread/4.cc: Moved to...
1759         * testsuite/30_threads/this_thread/sleep_until-mt.cc: ...here.
1760         * testsuite/30_threads/this_thread/58038.cc: Add
1761         dg-require-sleep.
1762         * testsuite/30_threads/this_thread/60421.cc: Likewise.
1763         * testsuite/30_threads/this_thread/sleep_for.cc: New test.
1764         * testsuite/30_threads/this_thread/sleep_until.cc: New test.
1765
1766 2020-08-10  Jonathan Wakely  <jwakely@redhat.com>
1767
1768         PR libstdc++/94681
1769         * src/c++17/fs_ops.cc (read_symlink): Use posix::lstat instead
1770         of calling ::lstat directly.
1771         * src/filesystem/ops.cc (read_symlink): Likewise.
1772
1773 2020-08-10  Jonathan Wakely  <jwakely@redhat.com>
1774
1775         * python/libstdcxx/v6/printers.py (UniquePointerPrinter.__init__):
1776         Use gdb.Type.strip_typedefs().
1777         * testsuite/libstdc++-prettyprinters/compat.cc: Use a typedef in
1778         the emulated old type.
1779
1780 2020-08-10  Jonathan Wakely  <jwakely@redhat.com>
1781
1782         PR libstdc++/94681
1783         * acinclude.m4 (GLIBCXX_CHECK_FILESYSTEM_DEPS): Do not depend on
1784         $enable_libstdcxx_filesystem_ts.
1785         * configure: Regenerate.
1786
1787 2020-08-10  Jonathan Wakely  <jwakely@redhat.com>
1788
1789         PR libstdc++/93904
1790         * include/bits/stl_iterator.h (inserter): Do not deduce
1791         iterator type (LWG 561).
1792         * testsuite/24_iterators/insert_iterator/dr561.cc: New test.
1793
1794 2020-08-10  Jonathan Wakely  <jwakely@redhat.com>
1795
1796         * include/bits/basic_string.tcc [_GLIBCXX_USE_CXX11_ABI=0]
1797         (basic_string::reserve()): Do nothing if exceptions are not
1798         enabled.
1799
1800 2020-08-10  Jonathan Wakely  <jwakely@redhat.com>
1801
1802         PR libstdc++/95749
1803         * src/filesystem/ops-common.h [_GLIBCXX_FILESYSTEM_IS_WINDOWS]
1804         (stat_type): Change to __stat64.
1805         (stat): Use _wstat64.
1806
1807 2020-08-07  Jonathan Wakely  <jwakely@redhat.com>
1808
1809         PR libstdc++/96303
1810         * include/debug/bitset (bitset::operator==): Call _M_base() on
1811         right operand.
1812         (bitset::operator!=): Likewise, but don't define it at all when
1813         default comparisons are supported by the compiler.
1814         * testsuite/23_containers/bitset/operations/96303.cc: New test.
1815
1816 2020-08-07  Jonathan Wakely  <jwakely@redhat.com>
1817
1818         * testsuite/18_support/comparisons/algorithms/partial_order.cc:
1819         Replace VERIFY with static_assert where the compiler now
1820         allows it.
1821         * testsuite/18_support/comparisons/algorithms/weak_order.cc:
1822         Likewise.
1823
1824 2020-08-07  Jonathan Wakely  <jwakely@redhat.com>
1825
1826         * config/abi/pre/gnu.ver: Fix wildcards for wstring symbols.
1827
1828 2020-08-06  Andrew Luo  <andrewluotechnologies@outlook.com>
1829             Jonathan Wakely  <jwakely@redhat.com>
1830
1831         * config/abi/pre/gnu.ver (GLIBCXX_3.4): Use less greedy
1832         patterns for basic_string members.
1833         (GLIBCXX_3.4.29): Export new basic_string::reserve symbols.
1834         * doc/xml/manual/status_cxx2020.xml: Update P0966 status.
1835         * include/bits/basic_string.h (shrink_to_fit()): Call reserve().
1836         (reserve(size_type)): Remove default argument.
1837         (reserve()): Declare new overload.
1838         [!_GLIBCXX_USE_CXX11_ABI] (shrink_to_fit, reserve): Likewise.
1839         * include/bits/basic_string.tcc (reserve(size_type)): Remove
1840         support for shrinking capacity.
1841         (reserve()): Perform shrink-to-fit operation.
1842         [!_GLIBCXX_USE_CXX11_ABI] (reserve): Likewise.
1843         * testsuite/21_strings/basic_string/capacity/1.cc: Adjust to
1844         reflect new behavior.
1845         * testsuite/21_strings/basic_string/capacity/char/1.cc:
1846         Likewise.
1847         * testsuite/21_strings/basic_string/capacity/char/18654.cc:
1848         Likewise.
1849         * testsuite/21_strings/basic_string/capacity/char/2.cc:
1850         Likewise.
1851         * testsuite/21_strings/basic_string/capacity/wchar_t/1.cc:
1852         Likewise.
1853         * testsuite/21_strings/basic_string/capacity/wchar_t/18654.cc:
1854         Likewise.
1855         * testsuite/21_strings/basic_string/capacity/wchar_t/2.cc:
1856         Likewise.
1857
1858 2020-08-06  Jonathan Wakely  <jwakely@redhat.com>
1859
1860         * include/bits/basic_string.tcc
1861         (operator>>(basic_istream&, basic_string&)): Do not set eofbit
1862         if extraction stopped after in.width() characters.
1863         * src/c++98/istream-string.cc (operator>>(istream&, string&)):
1864         Likewise.
1865         * include/bits/istream.tcc (__istream_extract): Do not set
1866         eofbit if extraction stopped after n-1 characters.
1867         * src/c++98/istream.cc (__istream_extract): Likewise.
1868         * testsuite/21_strings/basic_string/inserters_extractors/char/13.cc: New test.
1869         * testsuite/21_strings/basic_string/inserters_extractors/wchar_t/13.cc: New test.
1870         * testsuite/27_io/basic_istream/extractors_character/char/5.cc: New test.
1871         * testsuite/27_io/basic_istream/extractors_character/wchar_t/5.cc: New test.
1872
1873 2020-08-06  Jonathan Wakely  <jwakely@redhat.com>
1874
1875         PR libstdc++/96484
1876         * src/c++17/fs_ops.cc (fs::read_symlink): Return an error
1877         immediately for non-symlinks.
1878         * src/filesystem/ops.cc (fs::read_symlink): Likewise.
1879
1880 2020-08-06  Jonathan Wakely  <jwakely@redhat.com>
1881
1882         * include/std/istream (operator>>(istream&, char*)): Add
1883         attributes to get warnings for pointers that are null or known
1884         to point to the end of a buffer. Request upper bound from
1885         __builtin_object_size check and handle zero-sized buffer case.
1886         (operator>>(istream&, signed char))
1887         (operator>>(istream&, unsigned char*)): Add attributes.
1888         * testsuite/27_io/basic_istream/extractors_character/char/overflow.cc:
1889         Check extracting into the middle of a buffer.
1890         * testsuite/27_io/basic_istream/extractors_character/wchar_t/overflow.cc: New test.
1891
1892 2020-08-05  Jonathan Wakely  <jwakely@redhat.com>
1893
1894         * include/std/atomic (atomic<T>::store): Reformat.
1895
1896 2020-08-05  Jonathan Wakely  <jwakely@redhat.com>
1897
1898         * doc/xml/manual/status_cxx2017.xml: Replace oneAPI DPC++ link
1899         with LLVM repo for PSTL.
1900         * doc/html/manual/status.html: Regenerate.
1901
1902 2020-08-05  Jonathan Wakely  <jwakely@redhat.com>
1903
1904         * config/abi/pre/gnu.ver (GLIBCXX_3.4.29): Export new symbols.
1905         * include/bits/istream.tcc (__istream_extract): New function
1906         template implementing both of operator>>(istream&, char*) and
1907         operator>>(istream&, char(&)[N]). Add explicit instantiation
1908         declaration for it. Remove explicit instantiation declarations
1909         for old function templates.
1910         * include/std/istream (__istream_extract): Declare.
1911         (operator>>(basic_istream<C,T>&, C*)): Define inline and simply
1912         call __istream_extract.
1913         (operator>>(basic_istream<char,T>&, signed char*)): Likewise.
1914         (operator>>(basic_istream<char,T>&, unsigned char*)): Likewise.
1915         (operator>>(basic_istream<C,T>&, C(7)[N])): Define for LWG 2499.
1916         (operator>>(basic_istream<char,T>&, signed char(&)[N])):
1917         Likewise.
1918         (operator>>(basic_istream<char,T>&, unsigned char(&)[N])):
1919         Likewise.
1920         * include/std/streambuf (basic_streambuf): Declare char overload
1921         of __istream_extract as a friend.
1922         * src/c++11/istream-inst.cc: Add explicit instantiation
1923         definition for wchar_t overload of __istream_extract. Remove
1924         explicit instantiation definitions of old operator>> overloads
1925         for versioned-namespace build.
1926         * src/c++98/istream.cc (operator>>(istream&, char*)): Replace
1927         with __istream_extract(istream&, char*, streamsize).
1928         * testsuite/27_io/basic_istream/extractors_character/char/3.cc:
1929         Do not use variable-length array.
1930         * testsuite/27_io/basic_istream/extractors_character/char/4.cc:
1931         Do not run test for C++20.
1932         * testsuite/27_io/basic_istream/extractors_character/char/9555-ic.cc:
1933         Do not test writing to pointers for C++20.
1934         * testsuite/27_io/basic_istream/extractors_character/char/9826.cc:
1935         Use array instead of pointer.
1936         * testsuite/27_io/basic_istream/extractors_character/wchar_t/3.cc:
1937         Do not use variable-length array.
1938         * testsuite/27_io/basic_istream/extractors_character/wchar_t/4.cc:
1939         Do not run test for C++20.
1940         * testsuite/27_io/basic_istream/extractors_character/wchar_t/9555-ic.cc:
1941         Do not test writing to pointers for C++20.
1942         * testsuite/27_io/basic_istream/extractors_character/char/lwg2499.cc:
1943         New test.
1944         * testsuite/27_io/basic_istream/extractors_character/char/lwg2499_neg.cc:
1945         New test.
1946         * testsuite/27_io/basic_istream/extractors_character/char/overflow.cc:
1947         New test.
1948         * testsuite/27_io/basic_istream/extractors_character/wchar_t/lwg2499.cc:
1949         New test.
1950         * testsuite/27_io/basic_istream/extractors_character/wchar_t/lwg2499_neg.cc:
1951         New test.
1952
1953 2020-08-01  Gerald Pfeifer  <gerald@pfeifer.com>
1954
1955         * doc/xml/manual/using_exceptions.xml: Move www.stroustrup.com to
1956         https.
1957         * doc/html/manual/using_exceptions.html: Regenerate.
1958
1959 2020-07-31  Gerald Pfeifer  <gerald@pfeifer.com>
1960
1961         * doc/xml/manual/status_cxx2017.xml: ParallelSTL is now part
1962         of oneAPI DPC++ Library on Github.
1963         * doc/html/manual/status.html: Regenerate.
1964
1965 2020-07-31  François Dumont  <fdumont@gcc.gnu.org>
1966
1967         * include/bits/stl_bvector.h
1968         [_GLIBCXX_INLINE_VERSION](_Bvector_impl_data::_M_start): Define as
1969         _Bit_type*.
1970         (_Bvector_impl_data(const _Bvector_impl_data&)): Default.
1971         (_Bvector_impl_data(_Bvector_impl_data&&)): Delegate to latter.
1972         (_Bvector_impl_data::operator=(const _Bvector_impl_data&)): Default.
1973         (_Bvector_impl_data::_M_move_data(_Bvector_impl_data&&)): Use latter.
1974         (_Bvector_impl_data::_M_reset()): Likewise.
1975         (_Bvector_impl_data::_M_swap_data): New.
1976         (_Bvector_impl::_Bvector_impl(_Bvector_impl&&)): Implement explicitely.
1977         (_Bvector_impl::_Bvector_impl(_Bit_alloc_type&&, _Bvector_impl&&)): New.
1978         (_Bvector_base::_Bvector_base(_Bvector_base&&, const allocator_type&)):
1979         New, use latter.
1980         (vector::vector(vector&&, const allocator_type&, true_type)): New, use
1981         latter.
1982         (vector::vector(vector&&, const allocator_type&, false_type)): New.
1983         (vector::vector(vector&&, const allocator_type&)): Use latters.
1984         (vector::vector(const vector&, const allocator_type&)): Adapt.
1985         [__cplusplus >= 201103](vector::vector(_InputIt, _InputIt,
1986         const allocator_type&)): Use _M_initialize_range.
1987         (vector::operator[](size_type)): Use iterator operator[].
1988         (vector::operator[](size_type) const): Use const_iterator operator[].
1989         (vector::swap(vector&)): Add assertions on allocators. Use _M_swap_data.
1990         [__cplusplus >= 201103](vector::insert(const_iterator, _InputIt,
1991         _InputIt)): Use _M_insert_range.
1992         (vector::_M_initialize(size_type)): Adapt.
1993         [__cplusplus >= 201103](vector::_M_initialize_dispatch): Remove.
1994         [__cplusplus >= 201103](vector::_M_insert_dispatch): Remove.
1995         * python/libstdcxx/v6/printers.py (StdVectorPrinter._iterator): Stop
1996         using start _M_offset.
1997         (StdVectorPrinter.to_string): Likewise.
1998         * testsuite/23_containers/vector/bool/allocator/swap.cc: Adapt.
1999         * testsuite/23_containers/vector/bool/cons/noexcept_move_construct.cc:
2000         Add check.
2001
2002 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
2003
2004         * testsuite/27_io/basic_istream/ignore/char/94749.cc: Use 0
2005         instead of nullptr.
2006         * testsuite/27_io/basic_istream/ignore/wchar_t/94749.cc:
2007         Likewise.
2008
2009 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
2010
2011         * testsuite/20_util/specialized_algorithms/uninitialized_fill_n/sizes.cc:
2012         Move struct to namespace scope.
2013
2014 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
2015
2016         * testsuite/26_numerics/numbers/float128.cc: Check
2017         __STRICT_ANSI__ before using __float128.
2018         * testsuite/std/concepts/concepts.lang/concept.arithmetic/floating_point.cc:
2019         Likewise.
2020
2021 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
2022
2023         * testsuite/18_support/set_terminate.cc: Require C++11 or
2024         higher.
2025         * testsuite/28_regex/simple_c++11.cc: Likewise.
2026         * testsuite/tr1/headers/c++200x/complex.cc: Likewise.
2027         * testsuite/24_iterators/headers/iterator/synopsis.cc:
2028         Require C++14 or lower.
2029
2030 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
2031
2032         * testsuite/23_containers/span/back_assert_neg.cc: Split c++2a
2033         effective-target from xfail selector.
2034         * testsuite/23_containers/span/first_2_assert_neg.cc: Likewise.
2035         * testsuite/23_containers/span/first_assert_neg.cc: Likewise.
2036         * testsuite/23_containers/span/front_assert_neg.cc: Likewise.
2037         * testsuite/23_containers/span/index_op_assert_neg.cc: Likewise.
2038         * testsuite/23_containers/span/last_2_assert_neg.cc: Likewise.
2039         * testsuite/23_containers/span/last_assert_neg.cc: Likewise.
2040         * testsuite/23_containers/span/subspan_2_assert_neg.cc:
2041         Likewise.
2042         * testsuite/23_containers/span/subspan_3_assert_neg.cc:
2043         Likewise.
2044         * testsuite/23_containers/span/subspan_4_assert_neg.cc:
2045         Likewise.
2046         * testsuite/23_containers/span/subspan_5_assert_neg.cc:
2047         Likewise.
2048         * testsuite/23_containers/span/subspan_6_assert_neg.cc:
2049         Likewise.
2050         * testsuite/23_containers/span/subspan_assert_neg.cc: Likewise.
2051
2052 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
2053
2054         * testsuite/20_util/reference_wrapper/83427.cc: Adjust
2055         effective-target to specific language mode only.
2056         * testsuite/24_iterators/headers/iterator/range_access_c++11.cc:
2057         Likewise.
2058         * testsuite/24_iterators/headers/iterator/range_access_c++14.cc:
2059         Likewise.
2060         * testsuite/24_iterators/headers/iterator/synopsis_c++11.cc:
2061         Likewise.
2062         * testsuite/24_iterators/headers/iterator/synopsis_c++14.cc:
2063         Likewise.
2064         * testsuite/26_numerics/valarray/69116.cc:
2065         Likewise.
2066         * testsuite/30_threads/headers/condition_variable/std_c++0x_neg.cc:
2067         Remove whitespace at end of file.
2068         * testsuite/30_threads/headers/future/std_c++0x_neg.cc:
2069         Likewise.
2070
2071 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
2072
2073         * testsuite/17_intro/headers/c++2017/all_attributes.cc: Add
2074         c++17 effective-target.
2075         * testsuite/17_intro/headers/c++2017/all_no_exceptions.cc:
2076         Likewise.
2077         * testsuite/17_intro/headers/c++2017/all_no_rtti.cc: Likewise.
2078         * testsuite/17_intro/headers/c++2017/all_pedantic_errors.cc:
2079         Likewise.
2080         * testsuite/17_intro/headers/c++2017/operator_names.cc:
2081         Likewise.
2082         * testsuite/17_intro/headers/c++2017/stdc++.cc: Likewise.
2083         * testsuite/17_intro/headers/c++2017/stdc++_multiple_inclusion.cc:
2084         Likewise.
2085         * testsuite/18_support/uncaught_exceptions/uncaught_exceptions.cc:
2086         Likewise.
2087         * testsuite/19_diagnostics/error_code/is_error_code_v.cc:
2088         Likewise.
2089         * testsuite/20_util/any/assign/1.cc: Likewise.
2090         * testsuite/20_util/any/assign/2.cc: Likewise.
2091         * testsuite/20_util/any/assign/emplace.cc: Likewise.
2092         * testsuite/20_util/any/assign/exception.cc: Likewise.
2093         * testsuite/20_util/any/assign/self.cc: Likewise.
2094         * testsuite/20_util/any/cons/1.cc: Likewise.
2095         * testsuite/20_util/any/cons/2.cc: Likewise.
2096         * testsuite/20_util/any/cons/aligned.cc: Likewise.
2097         * testsuite/20_util/any/cons/explicit.cc: Likewise.
2098         * testsuite/20_util/any/cons/in_place.cc: Likewise.
2099         * testsuite/20_util/any/cons/nontrivial.cc: Likewise.
2100         * testsuite/20_util/any/make_any.cc: Likewise.
2101         * testsuite/20_util/any/misc/any_cast.cc: Likewise.
2102         * testsuite/20_util/any/misc/any_cast_no_rtti.cc: Likewise.
2103         * testsuite/20_util/any/misc/swap.cc: Likewise.
2104         * testsuite/20_util/any/modifiers/1.cc: Likewise.
2105         * testsuite/20_util/any/observers/type.cc: Likewise.
2106         * testsuite/20_util/any/requirements.cc: Likewise.
2107         * testsuite/20_util/any/typedefs.cc: Likewise.
2108         * testsuite/20_util/as_const/1.cc: Likewise.
2109         * testsuite/20_util/as_const/rvalue_neg.cc: Likewise.
2110         * testsuite/20_util/bind/is_placeholder_v.cc: Likewise.
2111         * testsuite/20_util/bool_constant/requirements.cc: Likewise.
2112         * testsuite/20_util/duration/requirements/treat_as_floating_point_v.cc:
2113         Likewise.
2114         * testsuite/20_util/duration_cast/rounding.cc: Likewise.
2115         * testsuite/20_util/enable_shared_from_this/members/weak_from_this.cc:
2116         Likewise.
2117         * testsuite/20_util/function_objects/invoke/59768.cc: Likewise.
2118         * testsuite/20_util/function_objects/not_fn/1.cc: Likewise.
2119         * testsuite/20_util/function_objects/searchers.cc: Likewise.
2120         * testsuite/20_util/in_place/requirements.cc: Likewise.
2121         * testsuite/20_util/is_invocable/requirements/explicit_instantiation.cc:
2122         Likewise.
2123         * testsuite/20_util/is_invocable/requirements/typedefs.cc:
2124         Likewise.
2125         * testsuite/20_util/is_invocable/value.cc: Likewise.
2126         * testsuite/20_util/is_nothrow_invocable/requirements/explicit_instantiation.cc:
2127         Likewise.
2128         * testsuite/20_util/is_nothrow_invocable/requirements/typedefs.cc:
2129         Likewise.
2130         * testsuite/20_util/is_nothrow_swappable/requirements/explicit_instantiation.cc:
2131         Likewise.
2132         * testsuite/20_util/is_nothrow_swappable/requirements/typedefs.cc:
2133         Likewise.
2134         * testsuite/20_util/is_nothrow_swappable/value.cc: Likewise.
2135         * testsuite/20_util/is_nothrow_swappable_with/requirements/explicit_instantiation.cc:
2136         Likewise.
2137         * testsuite/20_util/is_nothrow_swappable_with/requirements/typedefs.cc:
2138         Likewise.
2139         * testsuite/20_util/is_nothrow_swappable_with/value.cc:
2140         Likewise.
2141         * testsuite/20_util/is_swappable/requirements/explicit_instantiation.cc:
2142         Likewise.
2143         * testsuite/20_util/is_swappable/requirements/typedefs.cc:
2144         Likewise.
2145         * testsuite/20_util/is_swappable/value.cc: Likewise.
2146         * testsuite/20_util/is_swappable_with/requirements/explicit_instantiation.cc:
2147         Likewise.
2148         * testsuite/20_util/is_swappable_with/requirements/typedefs.cc:
2149         Likewise.
2150         * testsuite/20_util/is_swappable_with/value.cc: Likewise.
2151         * testsuite/20_util/logical_traits/requirements/explicit_instantiation.cc:
2152         Likewise.
2153         * testsuite/20_util/logical_traits/requirements/typedefs.cc:
2154         Likewise.
2155         * testsuite/20_util/logical_traits/value.cc: Likewise.
2156         * testsuite/20_util/optional/constexpr/make_optional.cc: Likewise.
2157         * testsuite/20_util/optional/constexpr/observers/2.cc: Likewise.
2158         * testsuite/20_util/optional/constexpr/observers/3.cc: Likewise.
2159         * testsuite/20_util/optional/hash.cc: Likewise.
2160         * testsuite/20_util/pair/swap_cxx17.cc: Likewise.
2161         * testsuite/20_util/ratio/requirements/ratio_equal_v.cc: Likewise.
2162         * testsuite/20_util/shared_ptr/requirements/weak_type.cc:
2163         Likewise.
2164         * testsuite/20_util/specialized_algorithms/memory_management_tools/1.cc:
2165         Likewise.
2166         * testsuite/20_util/tuple/apply/1.cc: Likewise.
2167         * testsuite/20_util/tuple/make_from_tuple/1.cc: Likewise.
2168         * testsuite/20_util/tuple/swap_cxx17.cc: Likewise.
2169         * testsuite/20_util/tuple/tuple_size_v.cc: Likewise.
2170         * testsuite/20_util/unique_ptr/specialized_algorithms/swap_cxx17.cc:
2171         Likewise.
2172         * testsuite/20_util/uses_allocator/requirements/uses_allocator_v.cc:
2173         Likewise.
2174         * testsuite/20_util/variant/any.cc: Likewise.
2175         * testsuite/20_util/variant/compile.cc: Likewise.
2176         * testsuite/20_util/variant/hash.cc: Likewise.
2177         * testsuite/20_util/variant/index_type.cc: Likewise.
2178         * testsuite/20_util/variant/run.cc: Likewise.
2179         * testsuite/20_util/void_t/1.cc: Likewise.
2180         * testsuite/21_strings/basic_string/79162.cc: Likewise.
2181         * testsuite/21_strings/basic_string/cons/char/7.cc: Likewise.
2182         * testsuite/21_strings/basic_string/cons/wchar_t/7.cc: Likewise.
2183         * testsuite/21_strings/basic_string/lwg2758.cc: Likewise.
2184         * testsuite/21_strings/basic_string/lwg2946.cc: Likewise.
2185         * testsuite/21_strings/basic_string/modifiers/append/char/4.cc:
2186         Likewise.
2187         * testsuite/21_strings/basic_string/modifiers/append/wchar_t/4.cc:
2188         Likewise.
2189         * testsuite/21_strings/basic_string/modifiers/assign/char/4.cc:
2190         Likewise.
2191         * testsuite/21_strings/basic_string/modifiers/assign/wchar_t/4.cc:
2192         Likewise.
2193         * testsuite/21_strings/basic_string/modifiers/insert/char/3.cc:
2194         Likewise.
2195         * testsuite/21_strings/basic_string/modifiers/insert/wchar_t/3.cc:
2196         Likewise.
2197         * testsuite/21_strings/basic_string/modifiers/replace/char/7.cc:
2198         Likewise.
2199         * testsuite/21_strings/basic_string/modifiers/replace/wchar_t/7.cc:
2200         Likewise.
2201         * testsuite/21_strings/basic_string/operations/compare/char/2.cc:
2202         Likewise.
2203         * testsuite/21_strings/basic_string/operations/compare/wchar_t/2.cc:
2204         Likewise.
2205         * testsuite/21_strings/basic_string/operations/data/char/2.cc:
2206         Likewise.
2207         * testsuite/21_strings/basic_string/operations/data/wchar_t/2.cc:
2208         Likewise.
2209         * testsuite/21_strings/basic_string/operations/find/char/5.cc:
2210         Likewise.
2211         * testsuite/21_strings/basic_string/operations/find/wchar_t/5.cc:
2212         Likewise.
2213         * testsuite/21_strings/basic_string/operators/char/5.cc: Likewise.
2214         * testsuite/21_strings/basic_string/operators/wchar_t/5.cc:
2215         Likewise.
2216         * testsuite/21_strings/basic_string_view/capacity/1.cc: Likewise.
2217         * testsuite/21_strings/basic_string_view/cons/char/1.cc: Likewise.
2218         * testsuite/21_strings/basic_string_view/cons/char/2.cc: Likewise.
2219         * testsuite/21_strings/basic_string_view/cons/char/3.cc: Likewise.
2220         * testsuite/21_strings/basic_string_view/cons/wchar_t/1.cc:
2221         Likewise.
2222         * testsuite/21_strings/basic_string_view/cons/wchar_t/2.cc:
2223         Likewise.
2224         * testsuite/21_strings/basic_string_view/cons/wchar_t/3.cc:
2225         Likewise.
2226         * testsuite/21_strings/basic_string_view/element_access/char/1.cc:
2227         Likewise.
2228         * testsuite/21_strings/basic_string_view/element_access/char/2.cc:
2229         Likewise.
2230         * testsuite/21_strings/basic_string_view/element_access/char/empty.cc:
2231         Likewise.
2232         * testsuite/21_strings/basic_string_view/element_access/char/front_back.cc:
2233         Likewise.
2234         * testsuite/21_strings/basic_string_view/element_access/wchar_t/1.cc:
2235         Likewise.
2236         * testsuite/21_strings/basic_string_view/element_access/wchar_t/2.cc:
2237         Likewise.
2238         * testsuite/21_strings/basic_string_view/element_access/wchar_t/empty.cc:
2239         Likewise.
2240         * testsuite/21_strings/basic_string_view/element_access/wchar_t/front_back.cc:
2241         Likewise.
2242         * testsuite/21_strings/basic_string_view/include.cc: Likewise.
2243         * testsuite/21_strings/basic_string_view/inserters/char/1.cc:
2244         Likewise.
2245         * testsuite/21_strings/basic_string_view/inserters/char/2.cc:
2246         Likewise.
2247         * testsuite/21_strings/basic_string_view/inserters/char/3.cc:
2248         Likewise.
2249         * testsuite/21_strings/basic_string_view/inserters/pod/10081-out.cc:
2250         Likewise.
2251         * testsuite/21_strings/basic_string_view/inserters/wchar_t/1.cc:
2252         Likewise.
2253         * testsuite/21_strings/basic_string_view/inserters/wchar_t/2.cc:
2254         Likewise.
2255         * testsuite/21_strings/basic_string_view/inserters/wchar_t/3.cc:
2256         Likewise.
2257         * testsuite/21_strings/basic_string_view/literals/types-char8_t.cc:
2258         Likewise.
2259         * testsuite/21_strings/basic_string_view/literals/types.cc:
2260         Likewise.
2261         * testsuite/21_strings/basic_string_view/literals/values-char8_t.cc:
2262         Likewise.
2263         * testsuite/21_strings/basic_string_view/literals/values.cc:
2264         Likewise.
2265         * testsuite/21_strings/basic_string_view/modifiers/remove_prefix/char/1.cc:
2266         Likewise.
2267         * testsuite/21_strings/basic_string_view/modifiers/remove_prefix/wchar_t/1.cc:
2268         Likewise.
2269         * testsuite/21_strings/basic_string_view/modifiers/remove_suffix/char/1.cc:
2270         Likewise.
2271         * testsuite/21_strings/basic_string_view/modifiers/remove_suffix/wchar_t/1.cc:
2272         Likewise.
2273         * testsuite/21_strings/basic_string_view/operations/compare/char/1.cc:
2274         Likewise.
2275         * testsuite/21_strings/basic_string_view/operations/compare/char/13650.cc:
2276         Likewise.
2277         * testsuite/21_strings/basic_string_view/operations/compare/wchar_t/1.cc:
2278         Likewise.
2279         * testsuite/21_strings/basic_string_view/operations/compare/wchar_t/13650.cc:
2280         Likewise.
2281         * testsuite/21_strings/basic_string_view/operations/copy/char/1.cc:
2282         Likewise.
2283         * testsuite/21_strings/basic_string_view/operations/copy/wchar_t/1.cc:
2284         Likewise.
2285         * testsuite/21_strings/basic_string_view/operations/data/char/1.cc:
2286         Likewise.
2287         * testsuite/21_strings/basic_string_view/operations/data/wchar_t/1.cc:
2288         Likewise.
2289         * testsuite/21_strings/basic_string_view/operations/find/char/1.cc:
2290         Likewise.
2291         * testsuite/21_strings/basic_string_view/operations/find/char/2.cc:
2292         Likewise.
2293         * testsuite/21_strings/basic_string_view/operations/find/char/3.cc:
2294         Likewise.
2295         * testsuite/21_strings/basic_string_view/operations/find/char/4.cc:
2296         Likewise.
2297         * testsuite/21_strings/basic_string_view/operations/find/wchar_t/1.cc:
2298         Likewise.
2299         * testsuite/21_strings/basic_string_view/operations/find/wchar_t/2.cc:
2300         Likewise.
2301         * testsuite/21_strings/basic_string_view/operations/find/wchar_t/3.cc:
2302         Likewise.
2303         * testsuite/21_strings/basic_string_view/operations/find/wchar_t/4.cc:
2304         Likewise.
2305         * testsuite/21_strings/basic_string_view/operations/rfind/char/1.cc:
2306         Likewise.
2307         * testsuite/21_strings/basic_string_view/operations/rfind/char/2.cc:
2308         Likewise.
2309         * testsuite/21_strings/basic_string_view/operations/rfind/char/3.cc:
2310         Likewise.
2311         * testsuite/21_strings/basic_string_view/operations/rfind/wchar_t/1.cc:
2312         Likewise.
2313         * testsuite/21_strings/basic_string_view/operations/rfind/wchar_t/2.cc:
2314         Likewise.
2315         * testsuite/21_strings/basic_string_view/operations/rfind/wchar_t/3.cc:
2316         Likewise.
2317         * testsuite/21_strings/basic_string_view/operations/string_conversion/1.cc:
2318         Likewise.
2319         * testsuite/21_strings/basic_string_view/operations/substr/char/1.cc:
2320         Likewise.
2321         * testsuite/21_strings/basic_string_view/operations/substr/wchar_t/1.cc:
2322         Likewise.
2323         * testsuite/21_strings/basic_string_view/range_access/char/1.cc:
2324         Likewise.
2325         * testsuite/21_strings/basic_string_view/range_access/wchar_t/1.cc:
2326         Likewise.
2327         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/1.cc:
2328         Likewise.
2329         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/char/1.cc:
2330         Likewise.
2331         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/char16_t/1.cc:
2332         Likewise.
2333         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/char32_t/1.cc:
2334         Likewise.
2335         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/char8_t/1.cc:
2336         Likewise.
2337         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/wchar_t/1.cc:
2338         Likewise.
2339         * testsuite/21_strings/basic_string_view/requirements/typedefs.cc:
2340         Likewise.
2341         * testsuite/21_strings/basic_string_view/typedefs.cc: Likewise.
2342         * testsuite/21_strings/basic_string_view/types/1.cc: Likewise.
2343         * testsuite/23_containers/array/specialized_algorithms/swap_cxx17.cc:
2344         Likewise.
2345         * testsuite/23_containers/map/modifiers/extract.cc: Likewise.
2346         * testsuite/23_containers/map/modifiers/insert_or_assign/1.cc:
2347         Likewise.
2348         * testsuite/23_containers/map/modifiers/merge.cc: Likewise.
2349         * testsuite/23_containers/map/modifiers/try_emplace/1.cc: Likewise.
2350         * testsuite/23_containers/multimap/modifiers/extract.cc: Likewise.
2351         * testsuite/23_containers/multimap/modifiers/merge.cc: Likewise.
2352         * testsuite/23_containers/multiset/modifiers/extract.cc: Likewise.
2353         * testsuite/23_containers/multiset/modifiers/merge.cc: Likewise.
2354         * testsuite/23_containers/set/modifiers/extract.cc: Likewise.
2355         * testsuite/23_containers/set/modifiers/merge.cc: Likewise.
2356         * testsuite/23_containers/unordered_map/modifiers/extract.cc:
2357         Likewise.
2358         * testsuite/23_containers/unordered_map/modifiers/insert_or_assign.cc:
2359         Likewise.
2360         * testsuite/23_containers/unordered_map/modifiers/merge.cc:
2361         Likewise.
2362         * testsuite/23_containers/unordered_map/modifiers/try_emplace.cc:
2363         Likewise.
2364         * testsuite/23_containers/unordered_multimap/modifiers/extract.cc:
2365         Likewise.
2366         * testsuite/23_containers/unordered_multimap/modifiers/merge.cc:
2367         Likewise.
2368         * testsuite/23_containers/unordered_multiset/modifiers/extract.cc:
2369         Likewise.
2370         * testsuite/23_containers/unordered_multiset/modifiers/merge.cc:
2371         Likewise.
2372         * testsuite/23_containers/unordered_set/modifiers/extract.cc:
2373         Likewise.
2374         * testsuite/23_containers/unordered_set/modifiers/merge.cc:
2375         Likewise.
2376         * testsuite/24_iterators/headers/iterator/range_access_c++17.cc:
2377         Likewise.
2378         * testsuite/24_iterators/headers/iterator/synopsis_c++17.cc:
2379         Likewise.
2380         * testsuite/25_algorithms/clamp/1.cc: Likewise.
2381         * testsuite/25_algorithms/clamp/2.cc: Likewise.
2382         * testsuite/25_algorithms/clamp/constexpr.cc: Likewise.
2383         * testsuite/25_algorithms/clamp/requirements/explicit_instantiation/1.cc:
2384         Likewise.
2385         * testsuite/25_algorithms/clamp/requirements/explicit_instantiation/pod.cc:
2386         Likewise.
2387         * testsuite/26_numerics/headers/cmath/functions_std_c++17.cc:
2388         Likewise.
2389         * testsuite/26_numerics/headers/cmath/special_functions_global.cc:
2390         Likewise.
2391         * testsuite/27_io/basic_ostream/inserters_other/char/lwg2221.cc:
2392         Likewise.
2393         * testsuite/29_atomics/atomic/is_always_lock_free.cc: Likewise.
2394         * testsuite/29_atomics/atomic_integral/is_always_lock_free.cc:
2395         Likewise.
2396         * testsuite/30_threads/shared_lock/70766.cc: Likewise.
2397         * testsuite/30_threads/shared_mutex/cons/1.cc: Likewise.
2398         * testsuite/30_threads/shared_mutex/cons/assign_neg.cc:
2399         Likewise.
2400         * testsuite/30_threads/shared_mutex/cons/copy_neg.cc:
2401         Likewise.
2402         * testsuite/30_threads/shared_mutex/requirements/standard_layout.cc:
2403         Likewise.
2404         * testsuite/30_threads/shared_mutex/try_lock/1.cc: Likewise.
2405         * testsuite/30_threads/shared_mutex/try_lock/2.cc: Likewise.
2406         * testsuite/30_threads/shared_mutex/unlock/1.cc: Likewise.
2407
2408 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
2409
2410         PR libstdc++/96382
2411         * include/bits/stl_iterator.h (reverse_iterator): Friend
2412         declaration should not depend on __cplusplus.
2413
2414 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
2415
2416         * testsuite/experimental/filesystem/filesystem_error/cons.cc:
2417         Remove -std=gnu++17 option.
2418
2419 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
2420
2421         * testsuite/20_util/is_aggregate/value.cc: Adjust for changes to
2422         definition of aggregates in C++20.
2423         * testsuite/20_util/optional/requirements.cc: Adjust for
2424         defaulted comparisons in C++20.
2425
2426 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
2427
2428         * testsuite/20_util/tuple/78939.cc: Suppress warnings about
2429         deprecation of volatile-qualified structured bindings in C++20.
2430         * testsuite/20_util/variable_templates_for_traits.cc: Likewise
2431         for deprecation of is_pod in C++20
2432
2433 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
2434
2435         * testsuite/20_util/time_point_cast/rounding.cc: Remove
2436         duplicate dg-do directive and add c++17 effective target.
2437
2438 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
2439
2440         * src/c++17/floating_from_chars.cc (from_chars_impl): Use
2441         LC_ALL_MASK not LC_ALL.
2442
2443 2020-07-31  Richard Biener  <rguenther@suse.de>
2444
2445         PR debug/96383
2446         * testsuite/20_util/assume_aligned/3.cc: Use -g0.
2447
2448 2020-07-30  Jonathan Wakely  <jwakely@redhat.com>
2449
2450         * include/bits/basic_string.h (size_type, difference_type):
2451         Use allocator_traits to obtain the allocator's size_type and
2452         difference_type.
2453
2454 2020-07-30  Jonathan Wakely  <jwakely@redhat.com>
2455
2456         PR libstdc++/96279
2457         * src/c++17/floating_from_chars.cc (from_chars_impl): Use
2458         isinf unqualified.
2459         [!_GLIBCXX_USE_C99_STDLIB]: Use strtod for float and long
2460         double.
2461
2462 2020-07-30  Jonathan Wakely  <jwakely@redhat.com>
2463
2464         * testsuite/23_containers/unordered_multiset/cons/noexcept_default_construct.cc:
2465         Use allocator with the correct value type.
2466         * testsuite/23_containers/unordered_set/cons/noexcept_default_construct.cc:
2467         Likewise.
2468
2469 2020-07-30  Jonathan Wakely  <jwakely@redhat.com>
2470
2471         * testsuite/20_util/from_chars/4.cc: Pass non-const iterator
2472         to string::insert.
2473
2474 2020-07-30  Jonathan Wakely  <jwakely@redhat.com>
2475
2476         * include/bits/iterator_concepts.h (__detail::__cv_bool): New
2477         helper concept.
2478         (__detail::__integral_nonbool): Likewise.
2479         (__detail::__is_integer_like): Use __integral_nonbool.
2480         * testsuite/std/ranges/access/lwg3467.cc: New test.
2481
2482 2020-07-30  Jonathan Wakely  <jwakely@redhat.com>
2483
2484         * testsuite/20_util/from_chars/4.cc: Use dg-add-options ieee.
2485         * testsuite/29_atomics/atomic_float/1.cc: Likewise.
2486
2487 2020-07-30  Jonathan Wakely  <jwakely@redhat.com>
2488
2489         * testsuite/23_containers/vector/bool/72847.cc: Use the
2490         exceptions_enabled effective-target keyword instead of
2491         checking for an explicit -fno-exceptions option.
2492         * testsuite/util/testsuite_abi.cc (examine_symbol): Remove
2493         redundant try-catch.
2494         * testsuite/util/testsuite_allocator.h [!__cpp_exceptions]:
2495         Do not define check_allocate_max_size and memory_resource.
2496         * testsuite/util/testsuite_containers.h: Replace comment with
2497         #error if wrong standard dialect used.
2498         * testsuite/util/testsuite_shared.cc: Likewise.
2499
2500 2020-07-29  François Dumont  <fdumont@gcc.gnu.org>
2501
2502         * include/bits/hashtable_policy.h (_Node_iterator_base()): New.
2503         (operator==(const _Node_iterator_base&, const _Node_iterator_base&)):
2504         Make hidden friend.
2505         (operator!=(const _Node_iterator_base&, const _Node_iterator_base&)):
2506         Make hidden friend.
2507         (_Local_iterator_base<>): Inherits _Node_iterator_base.
2508         (_Local_iterator_base<>::_M_cur): Remove.
2509         (_Local_iterator_base<>::_M_curr()): Remove.
2510         (operator==(const _Local_iterator_base&, const _Local_iterator_base&)):
2511         Remove.
2512         (operator!=(const _Local_iterator_base&, const _Local_iterator_base&)):
2513         Remove.
2514         * include/debug/unordered_map (unordered_map<>::_M_invalidate): Adapt.
2515         (unordered_multimap<>::_M_invalidate): Adapt.
2516         * include/debug/unordered_set (unordered_set<>::_M_invalidate): Adapt.
2517         (unordered_multiset<>::_M_invalidate): Adapt.
2518
2519 2020-07-29  David Edelsohn  <dje.gcc@gmail.com>
2520             Jonathan Wakely  <jwakely@redhat.com>
2521             Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
2522
2523         * testsuite/lib/dg-options.exp (add_options_for_libatomic): Add
2524         target powerpc-ibm-aix* and powerpc*-*-darwin*.
2525         * testsuite/29_atomics/atomic_float/value_init.cc: Add options
2526         for libatomic.
2527
2528 2020-07-29  François Dumont  <fdumont@gcc.gnu.org>
2529
2530         * include/bits/hashtable.h
2531         (_Hashtable(_Hashtable&& __ht, __node_alloc_type&& __a, true_type)):
2532         Add noexcept qualification.
2533         (_Hashtable(_Hashtable&&)): Fix noexcept qualification.
2534         (_Hashtable(_Hashtable&&, const allocator_type&)): Add noexcept
2535         qualification.
2536         * include/bits/unordered_map.h
2537         (unordered_map(unordered_map&&, const allocator_type&)): Add noexcept
2538         qualification.
2539         (unordered_multimap(unordered_multimap&&, const allocator_type&)):
2540         Likewise.
2541         * include/bits/unordered_set.h
2542         (unordered_set(unordered_set&&, const allocator_type&)): Likewise.
2543         (unordered_multiset(unordered_multiset&&, const allocator_type&)):
2544         Likewise.
2545         * include/debug/unordered_map
2546         (unordered_map(unordered_map&&, const allocator_type&)): Likewise.
2547         (unordered_multimap(unordered_multimap&&, const allocator_type&)):
2548         Likewise.
2549         * include/debug/unordered_set
2550         (unordered_set(unordered_set&&, const allocator_type&)): Likewise.
2551         (unordered_multiset(unordered_multiset&&, const allocator_type&)):
2552         Likewise.
2553         * testsuite/23_containers/unordered_map/allocator/default_init.cc:
2554         New test.
2555         * testsuite/23_containers/unordered_map/cons/noexcept_default_construct.cc:
2556         New test.
2557         * testsuite/23_containers/unordered_map/cons/noexcept_move_construct.cc:
2558         New test.
2559         * testsuite/23_containers/unordered_map/modifiers/move_assign.cc:
2560         New test.
2561         * testsuite/23_containers/unordered_multimap/cons/noexcept_default_construct.cc:
2562         New test.
2563         * testsuite/23_containers/unordered_multimap/cons/noexcept_move_construct.cc:
2564         New test.
2565         * testsuite/23_containers/unordered_multiset/cons/noexcept_default_construct.cc:
2566         New test.
2567         * testsuite/23_containers/unordered_multiset/cons/noexcept_move_construct.cc:
2568         New test.
2569         * testsuite/23_containers/unordered_set/allocator/default_init.cc:
2570         New test.
2571         * testsuite/23_containers/unordered_set/cons/noexcept_default_construct.cc:
2572         New test.
2573         * testsuite/23_containers/unordered_set/cons/noexcept_move_construct.cc:
2574         New test.
2575
2576 2020-07-28  François Dumont  <fdumont@gcc.gnu.org>
2577
2578         * include/bits/hashtable.h
2579         (_Hashtable<>(_InputIterator, _InputIterator, size_t, const _H1&,
2580         const _H2&, const _Hash&, const _Equal&, const _ExtractKey&,
2581         const allocator_type&, true_type)): New.
2582         (_Hashtable<>(_InputIterator, _InputIterator, size_t, const _H1&,
2583         const _H2&, const _Hash&, const _Equal&, const _ExtractKey&,
2584         const allocator_type&, false_type)): New.
2585         (_Hashtable<>(_InputIterator, _InputIterator, size_t, const _H1&,
2586         const _H2&, const _Hash&, const _Equal&, const _ExtractKey&,
2587         const allocator_type&)): Delegate to latters.
2588         (operator=(initializer_list<value_type>)): Rehash if too small.
2589         (_M_insert(_Arg&&, const _NodeGenerator&, true_type)): Remove
2590         size_t len parameter.
2591         * include/bits/hashtable_policy.h (_Insert_base<>::_M_insert_range):
2592         Do not try to get input range distance.
2593         * testsuite/23_containers/unordered_set/cons/bucket_hint.cc: New test.
2594         * testsuite/23_containers/unordered_set/modifiers/insert.cc: New test.
2595
2596 2020-07-27  François Dumont  <fdumont@gcc.gnu.org>
2597
2598         * include/bits/hashtable_policy.h (_Map_base<>::at): Use
2599         _Hashtable<>::find.
2600         (_Hashtable_base<>::_Equal_hash_code<>::_S_node_equals):New.
2601         (_Hashtable_base<>::_M_node_equals): New, use latter.
2602         (_Equality<_Key, _Value, _Alloc, _ExtractKey, _Equal, _H1, _H2, _Hash,
2603         _RehashPolicy, false>::_M_equal): Adapt to use latter.
2604         * include/bits/hashtable.h (_Hashtable<>::_M_update_bbegin): New.
2605         (_Hashtable<>::_M_assign): Use latter.
2606         (_Hashtable<>::_M_move_assign): Likewise.
2607         (_Hashtable<>(_Hashtable<>&&)): Likewise.
2608         (_Hashtable<>(_Hashtable<>&&, const allocator_type&)): Likewise.
2609         (_Hashtable<>::swap): Likewise.
2610         (_Hashtable<>::find): Build iterator directly from _M_find_node result.
2611         (_Hashtable<>::count): Use _Hashtable<>::find.
2612         (_Hashtable<>::equal_range): Likewise.
2613         (_Hashtable<>::_M_erase(false_type, const key_type&)): Use
2614         _M_node_equals.
2615
2616 2020-07-27  Jonathan Wakely  <jwakely@redhat.com>
2617
2618         * src/c++17/floating_from_chars.cc (from_chars_impl): Ensure
2619         that FE_NEAREST is used.
2620         * testsuite/20_util/from_chars/4.cc: Do not use if constexpr in
2621         a { target c++14 } test.
2622         [!_GLIBCXX_HAVE_USELOCALE]: Disable all tests.
2623         * testsuite/20_util/from_chars/5.cc [!_GLIBCXX_HAVE_USELOCALE]:
2624         Likewise.
2625         * testsuite/20_util/from_chars/6.cc: New test.
2626
2627 2020-07-22  Jonathan Wakely  <jwakely@redhat.com>
2628
2629         * include/std/future (future, shared_future, promise): Add
2630         static assertions to the primary template to reject array and
2631         function types.
2632         * testsuite/30_threads/future/requirements/lwg3458.cc: New test.
2633         * testsuite/30_threads/promise/requirements/lwg3466.cc: New test.
2634         * testsuite/30_threads/shared_future/requirements/lwg3458.cc: New test.
2635
2636 2020-07-22  Jonathan Wakely  <jwakely@redhat.com>
2637
2638         * include/bits/stl_iterator.h (reverse_iterator): Constrain
2639         converting constructor and converting assignment operator.
2640         Access source iterator's data member directly instead of
2641         calling base().
2642         (move_iterator): Likewise.
2643         * testsuite/24_iterators/move_iterator/dr3435.cc: New test.
2644         * testsuite/24_iterators/reverse_iterator/dr3435.cc: New test.
2645
2646 2020-07-20  Jonathan Wakely  <jwakely@redhat.com>
2647
2648         * acinclude.m4 (libtool_VERSION): Bump version.
2649         * config.h.in: Regenerate.
2650         * config/abi/pre/gnu.ver: Add GLIBCXX_3.4.29 version and new
2651         exports.
2652         * config/os/gnu-linux/ldbl-extra.ver: Add _GLIBCXX_LDBL_3.4.29
2653         version and new export.
2654         * configure: Regenerate.
2655         * configure.ac: Check for <xlocale.h> and uselocale.
2656         * crossconfig.m4: Add macro or checks for uselocale.
2657         * include/std/charconv (from_chars): Declare overloads for
2658         float, double, and long double.
2659         * src/c++17/Makefile.am: Add new file.
2660         * src/c++17/Makefile.in: Regenerate.
2661         * src/c++17/floating_from_chars.cc: New file.
2662         (from_chars): Define for float, double, and long double.
2663         * testsuite/20_util/from_chars/1_c++20_neg.cc: Prune extra
2664         diagnostics caused by new overloads.
2665         * testsuite/20_util/from_chars/1_neg.cc: Likewise.
2666         * testsuite/20_util/from_chars/2.cc: Check leading '+'.
2667         * testsuite/20_util/from_chars/4.cc: New test.
2668         * testsuite/20_util/from_chars/5.cc: New test.
2669         * testsuite/util/testsuite_abi.cc: Add new symbol versions.
2670
2671 2020-07-20  Jonathan Wakely  <jwakely@redhat.com>
2672
2673         * include/bits/istream.tcc
2674         (basic_istream::get(__streambuf_type&, char_type): Use unsigned
2675         long long for counter and check if it would overflow _M_gcount.
2676         * testsuite/27_io/basic_istream/get/char/lwg3464.cc: New test.
2677         * testsuite/27_io/basic_istream/get/wchar_t/lwg3464.cc: New test.
2678
2679 2020-07-17  Iain Sandoe  <iain@sandoe.co.uk>
2680
2681         * include/std/coroutine: Mark the methods of the
2682         trivial awaitables as constexpr.
2683
2684 2020-07-14  David Edelsohn  <dje.gcc@gmail.com>
2685
2686         * config/os/aix/t-aix: Set BITS from compiler cpp macro.
2687
2688 2020-07-13  Jonathan Wakely  <jwakely@redhat.com>
2689
2690         PR libstdc++/94749
2691         PR libstdc++/96161
2692         * include/bits/istream.tcc (basic_istream::ignore(streamsize))
2693         [n == max]: Check overflow conditions on _M_gcount. Rely on
2694         the fact that either EOF or the delimiter was reached.
2695         [n < max]: Check _M_gcount < n before checking for EOF or
2696         delimiter.
2697         (basic_istream::ignore(streamsize, char_type): Likewise.
2698         * src/c++98/compatibility.cc (istream::ignore(streamsize))
2699         (wistream::ignore(streamsize)): Likewise.
2700         * src/c++98/istream.cc (istream::ignore(streamsize, char_type))
2701         (wistream::ignore(streamsize, char_type)): Likewise.
2702         * testsuite/27_io/basic_istream/ignore/char/94749.cc: Check that
2703         delimiter is discarded if the number of characters ignored
2704         doesn't fit in streamsize.
2705         * testsuite/27_io/basic_istream/ignore/wchar_t/94749.cc:
2706         Likewise.
2707         * testsuite/27_io/basic_istream/ignore/char/96161.cc: New test.
2708         * testsuite/27_io/basic_istream/ignore/wchar_t/96161.cc: New test.
2709
2710 2020-07-08  François Dumont  <fdumont@gcc.gnu.org>
2711
2712         * include/bits/stl_tree.h (_Rb_tree_impl(_Rb_tree_impl&&)): Add noexcept
2713         qualification based only on _Compare one.
2714         * testsuite/23_containers/map/cons/noexcept_move_construct.cc: Add
2715         static asserts.
2716         * testsuite/23_containers/multimap/cons/noexcept_move_construct.cc:
2717         Likewise.
2718         * testsuite/23_containers/multiset/cons/noexcept_move_construct.cc:
2719         Likewise.
2720         * testsuite/23_containers/set/cons/noexcept_move_construct.cc: Likewise.
2721
2722 2020-07-07  Jonathan Wakely  <jwakely@redhat.com>
2723
2724         * include/std/limits: Whitespace changes.
2725
2726 2020-07-07  Jonathan Wakely  <jwakely@redhat.com>
2727
2728         * include/Makefile.am: Remove bits/int_limits.h.
2729         * include/Makefile.in: Regenerate.
2730         * include/bits/int_limits.h: Removed.
2731         * include/bits/parse_numbers.h (_Select_int_base): Replace
2732         __int_limits with __int_traits.
2733         * include/bits/range_access.h (_SSize::operator()): Likewise.
2734         * include/ext/numeric_traits.h (__numeric_traits_integer): Add
2735         static assertion.
2736         (__int_traits): New alias template.
2737         * include/std/bit (__rotl, __rotr, __countl_zero, __countl_one)
2738         (__countr_zero, __countr_one, __popcount, __bit_ceil)
2739         (__bit_floor, __bit_width) Replace __int_limits with
2740         __int_traits.
2741         * include/std/charconv (__to_chars_8, __from_chars_binary)
2742         (__from_chars_alpha_to_num, from_chars): Likewise.
2743         * include/std/memory_resource (polymorphic_allocator::allocate)
2744         (polymorphic_allocator::allocate_object): Likewise.
2745         * include/std/string_view (basic_string_view::_S_compare):
2746         Likewise.
2747         * include/std/utility (cmp_equal, cmp_less, in_range): Likewise.
2748
2749 2020-07-07  Jonathan Wakely  <jwakely@redhat.com>
2750
2751         * include/std/limits: Whitespace changes.
2752
2753 2020-07-06  Jonathan Wakely  <jwakely@redhat.com>
2754
2755         * include/std/optional (_Optional_payload_base, _Optional_base)
2756         (optional, __optional_hash_call_base): Adjust whitespace and
2757         other formatting. Remove redundant && tokens on template
2758         arguments to type traits.
2759
2760 2020-07-06  Jonathan Wakely  <jwakely@redhat.com>
2761
2762         * include/std/optional (make_optional): Add enable_if
2763         constraints and noexcept-specifier to each overload.
2764         * testsuite/20_util/optional/make_optional-2.cc: New test.
2765
2766 2020-07-06  Jonathan Wakely  <jwakely@redhat.com>
2767
2768         PR libstdc++/96036
2769         * include/std/optional (optional): Add noexcept-specifier to
2770         every constructor, assignment operator, emplace function and
2771         dereference operator.
2772         * testsuite/20_util/optional/assignment/noexcept.cc: New test.
2773         * testsuite/20_util/optional/cons/noexcept.cc: New test.
2774
2775 2020-07-06  Jonathan Wakely  <jwakely@redhat.com>
2776
2777         PR libstdc++/96063
2778         * include/bits/fs_dir.h: Use consistent tag in class-head.
2779         * include/bits/localefwd.h: Likewise.
2780         * include/bits/regex.h: Likewise.
2781         * include/bits/stl_map.h: Likewise.
2782         * include/bits/stl_multimap.h: Likewise.
2783         * include/bits/stl_multiset.h: Likewise.
2784         * include/bits/stl_set.h: Likewise.
2785         * include/std/complex: Likewise.
2786         * include/std/functional: Likewise.
2787         * include/std/future: Likewise.
2788         * include/std/system_error: Likewise.
2789         * include/std/thread: Likewise.
2790         * include/std/tuple: Likewise.
2791         * include/std/type_traits: Likewise.
2792         * include/std/valarray: Likewise.
2793
2794 2020-07-02  Jonathan Wakely  <jwakely@redhat.com>
2795
2796         * testsuite/27_io/basic_ios/conv/voidptr.cc: Add c++98_only
2797         target selector.
2798
2799 2020-07-02  Jonathan Wakely  <jwakely@redhat.com>
2800
2801         * testsuite/18_support/headers/cstdalign/std_c++0x_neg.cc: Add
2802         c++98_only target selector.
2803         * testsuite/18_support/headers/cstdbool/std_c++0x_neg.cc:
2804         Likewise.
2805         * testsuite/18_support/headers/cstdint/std_c++0x_neg.cc:
2806         Likewise.
2807         * testsuite/18_support/headers/new/synopsis_cxx98.cc: Likewise.
2808         * testsuite/19_diagnostics/headers/system_error/std_c++0x_neg.cc:
2809         Likewise.
2810         * testsuite/20_util/headers/type_traits/std_c++0x_neg.cc:
2811         Likewise.
2812         * testsuite/23_containers/headers/array/std_c++0x_neg.cc:
2813         Likewise.
2814         * testsuite/23_containers/headers/tuple/std_c++0x_neg.cc:
2815         Likewise.
2816         * testsuite/23_containers/headers/unordered_map/std_c++0x_neg.cc:
2817         Likewise.
2818         * testsuite/23_containers/headers/unordered_set/std_c++0x_neg.cc:
2819         Likewise.
2820         * testsuite/26_numerics/headers/ccomplex/std_c++0x_neg.cc:
2821         Likewise.
2822         * testsuite/26_numerics/headers/cfenv/std_c++0x_neg.cc:
2823         Likewise.
2824         * testsuite/26_numerics/headers/cmath/c99_classification_macros_c++98.cc:
2825         Likewise.
2826         * testsuite/26_numerics/headers/ctgmath/std_c++0x_neg.cc:
2827         Likewise.
2828         * testsuite/26_numerics/headers/random/std_c++0x_neg.cc:
2829         Likewise.
2830         * testsuite/27_io/headers/cinttypes/std_c++0x_neg.cc: Likewise.
2831         * testsuite/28_regex/headers/regex/std_c++0x_neg.cc: Likewise.
2832         * testsuite/29_atomics/headers/atomic/std_c++0x_neg.cc:
2833         Likewise.
2834         * testsuite/30_threads/headers/condition_variable/std_c++0x_neg.cc:
2835         Likewise.
2836         * testsuite/30_threads/headers/future/std_c++0x_neg.cc:
2837         Likewise.
2838         * testsuite/30_threads/headers/mutex/std_c++0x_neg.cc: Likewise.
2839         * testsuite/30_threads/headers/thread/std_c++0x_neg.cc:
2840         Likewise.
2841
2842 2020-07-02  Ville Voutilainen  <ville.voutilainen@gmail.com>
2843
2844         PR libstdc++/91807
2845         * include/std/variant
2846         (_Copy_assign_base::operator=(const _Copy_assign_base&):
2847         Do the move-assignment from a temporary so that the temporary
2848         is constructed with an explicit index.
2849         * testsuite/20_util/variant/91807.cc: New.
2850
2851 2020-07-02  Jonathan Wakely  <jwakely.gcc@gmail.com>
2852
2853         PR libstdc++/91153
2854         PR target/93224
2855         * testsuite/29_atomics/atomic_float/1.cc: Use different values
2856         for tests.
2857         * testsuite/29_atomics/atomic_ref/float.cc: Likewise.
2858
2859 2020-07-01  Jonathan Wakely  <jwakely@redhat.com>
2860
2861         PR libstdc++/94627
2862         * include/bits/regex.h (operator==, operator!=): Remove noexcept
2863         equality comparisons for match_results.
2864         * testsuite/28_regex/match_results/94627.cc: New test.
2865
2866 2020-07-01  Martin Sebor  <msebor@redhat.com>
2867
2868         * testsuite/21_strings/basic_string_view/cons/char/nonnull.cc: Adjust
2869         text of expected warning.
2870         * testsuite/21_strings/basic_string_view/cons/wchar_t/nonnull.cc: Same.
2871         * testsuite/21_strings/basic_string_view/operations/compare/char/nonnull.cc: Same.
2872         * testsuite/21_strings/basic_string_view/operations/find/char/nonnull.cc: Same.
2873         * testsuite/21_strings/basic_string_view/operations/rfind/char/nonnull.cc: Same.
2874
2875 2020-06-29  Ville Voutilainen  <ville.voutilainen@gmail.com>
2876
2877         Revert:
2878         2020-06-28  Ville Voutilainen  <ville.voutilainen@gmail.com>
2879
2880         * include/bits/basic_string.h (string(_CharT*, const _Alloc&)):
2881         Add a __nonnull__ attribute.
2882         * testsuite/21_strings/basic_string/cons/char/nonnull.cc: New.
2883         * testsuite/21_strings/basic_string/cons/wchar_t/nonnull.cc: Likewise.
2884
2885 2020-06-28  Ville Voutilainen  <ville.voutilainen@gmail.com>
2886
2887         * include/bits/basic_string.h (string(_CharT*, const _Alloc&)):
2888         Add a __nonnull__ attribute.
2889         * testsuite/21_strings/basic_string/cons/char/nonnull.cc: New.
2890         * testsuite/21_strings/basic_string/cons/wchar_t/nonnull.cc: Likewise.
2891
2892 2020-06-28  Ville Voutilainen  <ville.voutilainen@gmail.com>
2893
2894         PR libstdc++/95915
2895         * include/std/type_traits (is_literal_type, is_literal_type_v):
2896         Deprecate in C++17.
2897         * include/std/variant (_Uninitialized):
2898         Adjust the condition and the comment.
2899         * testsuite/20_util/is_literal_type/deprecated-1z.cc: New.
2900         * testsuite/20_util/is_literal_type/requirements/explicit_instantiation.cc:
2901         Adjust.
2902         * testsuite/20_util/is_literal_type/requirements/typedefs.cc: Likewise.
2903         * testsuite/20_util/is_literal_type/value.cc: Likewise.
2904         * testsuite/20_util/optional/constexpr/nullopt.cc:
2905         Use __is_literal_type directly.
2906         * testsuite/20_util/optional/nullopt.cc: Likewise.
2907         * testsuite/20_util/variable_templates_for_traits.cc: Adjust.
2908         * testsuite/20_util/variant/95915.cc: New.
2909         * testsuite/20_util/variant/compile.cc: Add new test.
2910         * testsuite/experimental/optional/constexpr/nullopt.cc:
2911         Use __is_literal_type directly.
2912         * testsuite/experimental/optional/nullopt.cc: Likewise.
2913         * testsuite/experimental/type_traits/value.cc: Adjust.
2914         * testsuite/util/testsuite_common_types.h:
2915         Use __is_literal_type directly.
2916
2917 2020-06-24  Jonathan Wakely  <jwakely@redhat.com>
2918
2919         * include/std/charconv (__from_chars_binary): Ignore leading zeros.
2920         * testsuite/20_util/from_chars/1.cc: Check "0x1" for all bases,
2921         not just 10 and 16.
2922         * testsuite/20_util/from_chars/3.cc: New test.
2923
2924 2020-06-24  Jonathan Wakely  <jwakely@redhat.com>
2925
2926         * include/bits/stl_algobase.h (__find_if): Add FALLTHRU markers.
2927         * include/std/charconv (__detail::__to_chars): Avoid
2928         -Wsign-compare warning.
2929
2930 2020-06-24  Jonathan Wakely  <jwakely@redhat.com>
2931
2932         PR libstdc++/95851
2933         * include/std/charconv (__to_chars_i): Check for zero-sized
2934         buffer unconditionally.
2935         * testsuite/20_util/to_chars/95851.cc: New test.
2936
2937 2020-06-23  Jonathan Wakely  <jwakely@redhat.com>
2938
2939         * testsuite/20_util/from_chars/1_c++20_neg.cc: Check enumeration
2940         type.
2941         * testsuite/20_util/from_chars/1_neg.cc: Likewise. Move dg-error
2942         directives outside preprocessor condition.
2943
2944 2020-06-23  Jonathan Wakely  <jwakely@redhat.com>
2945
2946         PR libstdc++/95832
2947         * include/std/variant (__detail::__variant::_Build_FUN): Remove
2948         partial specialization to prevent narrowing conversions to bool.
2949         * testsuite/20_util/variant/compile.cc: Test non-narrowing
2950         conversions to bool.
2951         * testsuite/20_util/variant/run.cc: Likewise.
2952
2953 2020-06-23  Jonathan Wakely  <jwakely@redhat.com>
2954
2955         * doc/Makefile.in: Regenerate.
2956         * include/Makefile.in: Regenerate.
2957         * libsupc++/Makefile.in: Regenerate.
2958         * po/Makefile.in: Regenerate.
2959         * python/Makefile.in: Regenerate.
2960         * src/Makefile.in: Regenerate.
2961         * src/c++11/Makefile.in: Regenerate.
2962         * src/c++17/Makefile.in: Regenerate.
2963         * src/c++98/Makefile.in: Regenerate.
2964         * src/filesystem/Makefile.in: Regenerate.
2965         * testsuite/Makefile.in: Regenerate.
2966
2967 2020-06-22  David Edelsohn  <dje.gcc@gmail.com>
2968
2969         * Makefile.am: Use -include.
2970         * Makefile.in: Regenerate.
2971
2972 2020-06-21  David Edelsohn  <dje.gcc@gmail.com>
2973
2974         * Makefile.am (tmake_file): Build and install AIX-style FAT libraries.
2975         * Makefile.in: Regenerate.
2976         * configure.ac (tmake_file): Substitute.
2977         * configure: Regenerate.
2978         * configure.host (aix*): Define tmake_file.
2979         * config/os/aix/t-aix: New file.
2980
2981 2020-06-20  Jason Merrill  <jason@redhat.com>
2982
2983         * testsuite/24_iterators/move_iterator/rel_ops_c++20.cc:
2984         Remove greedy_ops tests.
2985         * testsuite/24_iterators/reverse_iterator/rel_ops_c++20.cc:
2986         Remove greedy_ops tests.
2987
2988 2020-06-19  Jonathan Wakely  <jwakely@redhat.com>
2989
2990         PR libstdc++/95765
2991         * include/bits/stl_algobase.h (__size_to_integer(float))
2992         (__size_to_integer(double), __size_to_integer(long double))
2993         (__size_to_integer(__float128)): Cast return type explicitly.
2994         * include/bits/stl_uninitialized.h (__uninitialized_default_1<true>):
2995         Remove unused typedef.
2996
2997 2020-06-19  Jonathan Wakely  <jwakely@redhat.com>
2998
2999         * include/bits/stl_pair.h (_Index_tuple): Remove redundant
3000         namespace qualification.
3001         (pair::pair(tuple<>&, tuple<>&, _Index_tuple, _Index_tuple)):
3002         Likewise.
3003         * include/std/tuple (_Head_base, _Tuple_impl, tuple_size)
3004         (tuple_element, __get_helper, get, __make_tuple_impl)
3005         (__make_1st_indices, __tuple_concater)
3006         (pair::pair(tuple<>&, tuple<>&, _Index_tuple, _Index_tuple)):
3007         Likewise.
3008         * include/std/utility (tuple_element, __is_tuple_like_impl)
3009         (tuple_size, __pair_get, get): Likewise.
3010
3011 2020-06-19  Jonathan Wakely  <jwakely@redhat.com>
3012
3013         * include/bits/std_function.h (function): Define all member
3014         functions inline.
3015
3016 2020-06-19  Marc Glisse  <marc.glisse@inria.fr>
3017
3018         * include/bits/stl_algo.h (__includes): Simplify the code.
3019
3020 2020-06-19  Marc Glisse  <marc.glisse@inria.fr>
3021
3022         * include/std/optional (optional()): Explicitly define it.
3023
3024 2020-06-17  Jonathan Wakely  <jwakely@redhat.com>
3025
3026         PR libstdc++/94540
3027         * include/bits/stl_uninitialized.h (__uninitialized_default_1<true>):
3028         Construct the first value at *__first instead of on the stack.
3029         (__uninitialized_default_n_1<true>): Likewise.
3030         Improve comments on several of the non-standard algorithms.
3031         * testsuite/20_util/specialized_algorithms/uninitialized_default/94540.cc:
3032         New test.
3033         * testsuite/20_util/specialized_algorithms/uninitialized_default_n/94540.cc:
3034         New test.
3035         * testsuite/20_util/specialized_algorithms/uninitialized_value_construct/94540.cc:
3036         New test.
3037         * testsuite/20_util/specialized_algorithms/uninitialized_value_construct_n/94540.cc:
3038         New test.
3039         * testsuite/23_containers/vector/cons/94540.cc: New test.
3040
3041 2020-06-17  Jonathan Wakely  <jwakely@redhat.com>
3042
3043         * testsuite/20_util/specialized_algorithms/uninitialized_default_n/sizes.cc:
3044         Replace Value type with int so trivial code path is used.
3045         * testsuite/20_util/specialized_algorithms/uninitialized_value_construct_n/sizes.cc:
3046         Likewise.
3047
3048 2020-06-17  Jonathan Wakely  <jwakely@redhat.com>
3049
3050         * include/bits/stl_uninitialized.h (uninitialized_fill_n): Only
3051         use std::fill_n when the size is an integral type.
3052         (__uninitialized_default_n): Likewise.
3053         * testsuite/20_util/specialized_algorithms/uninitialized_default_n/sizes.cc:
3054         New test.
3055         * testsuite/20_util/specialized_algorithms/uninitialized_fill_n/sizes.cc:
3056         New test.
3057         * testsuite/20_util/specialized_algorithms/uninitialized_value_construct_n/sizes.cc:
3058         New test.
3059
3060 2020-06-16  Jonathan Wakely  <jwakely@redhat.com>
3061
3062         PR libstdc++/95282
3063         * include/bits/atomic_base.h (__atomic_impl::load): Use the _Val
3064         alias instead of deducing _Tp as an unqualified type.
3065         (__atomic_impl::exchange): Use the _Val alias to remove volatile
3066         from the reinterpret_cast result type.
3067
3068 2020-06-16  Jonathan Wakely  <jwakely@redhat.com>
3069
3070         * include/std/atomic (atomic): Add static assertions.
3071         * testsuite/29_atomics/atomic/requirements/types_neg.cc: New test.
3072
3073 2020-06-16  Patrick Palka  <ppalka@redhat.com>
3074
3075         PR libstdc++/94003
3076         * testsuite/20_util/is_constructible/94003.cc: New test.
3077
3078 2020-06-15  Jonathan Wakely  <jwakely@redhat.com>
3079
3080         * include/bits/char_traits.h (__cpp_lib_constexpr_char_traits):
3081         Update value for C++20.
3082         * include/std/version (__cpp_lib_constexpr_char_traits): Likewise.
3083         * testsuite/21_strings/char_traits/requirements/constexpr_functions_c++17.cc:
3084         Update expected value.
3085         * testsuite/21_strings/char_traits/requirements/constexpr_functions_c++20.cc:
3086         Likewise.
3087
3088 2020-06-15  Paul Keir  <paul.keir@uws.ac.uk>
3089
3090         * include/bits/char_traits.h (char_traits::move): constexpr move with
3091         overlap was using copy_backward incorrectly.
3092         * testsuite/21_strings/char_traits/requirements/constexpr_functions_c++20.cc:
3093         New test.
3094
3095 2020-06-12  Jonathan Wakely  <jwakely@redhat.com>
3096
3097         * testsuite/29_atomics/atomic_flag/clear/1.cc: Also test clear()
3098         when the value is currently set.
3099         * testsuite/29_atomics/atomic_flag/test_and_set/explicit.cc:
3100         Actually check the return value.
3101         * testsuite/29_atomics/atomic_flag/test_and_set/implicit.cc:
3102         Likewise.
3103
3104 2020-06-12  Jonathan Wakely  <jwakely@redhat.com>
3105
3106         * include/bits/atomic_base.h (atomic_flag::test): Add missing
3107         const qualifiers.
3108         * testsuite/29_atomics/atomic_flag/test/explicit.cc: Add
3109         dg-options and verify results of test function.
3110         * testsuite/29_atomics/atomic_flag/test/implicit.cc: Likewise.
3111
3112 2020-06-11  Jonathan Wakely  <jwakely@redhat.com>
3113
3114         PR libstdc++/94749
3115         * include/bits/istream.tcc (basic_istream::ignore(streamsize, CharT)):
3116         Only discard an extra character if we didn't already reach the
3117         maximum number.
3118         * src/c++98/istream.cc (istream::ignore(streamsiz, char))
3119         (wistream::ignore(streamsize, wchar_t)): Likewise.
3120         * testsuite/27_io/basic_istream/ignore/char/94749.cc: New test.
3121         * testsuite/27_io/basic_istream/ignore/wchar_t/94749.cc: New test.
3122
3123 2020-06-10  Patrick Palka  <ppalka@redhat.com>
3124
3125         PR libstdc++/95578
3126         * include/bits/ranges_algo.h (__lexicographical_compare_fn):
3127         Also check that the iterator and sentinel have the same type before
3128         applying the unwrapping optimization for __normal_iterator.
3129         Split the check into two, one for the first iterator/sentinel
3130         pair and another for second iterator/sentinel pair.  Remove uses
3131         of __niter_base, and remove uses of std::move on a
3132         __normal_iterator.
3133         * include/bits/ranges_algobase.h (__equal_fn): Likewise.
3134         (__copy_or_move): Likewise.  Perform similar adjustments for
3135         the reverse_iterator and move_iterator optimizations.  Inline
3136         the checks into the if-constexprs, and use using-declarations to
3137         make them less visually noisy.  Remove uses of __niter_wrap.
3138         (__copy_or_move_backward): Likewise.
3139         * testsuite/25_algorithms/copy/95578.cc: New test.
3140         * testsuite/25_algorithms/copy_backward/95578.cc: New test.
3141         * testsuite/25_algorithms/equal/95578.cc: New test.
3142         * testsuite/25_algorithms/lexicographical_compare/95578.cc: New test.
3143         * testsuite/25_algorithms/move/95578.cc: New test.
3144         * testsuite/25_algorithms/move_backward/95578.cc: New test.
3145
3146 2020-06-10  François Dumont  <fdumont@gcc.gnu.org>
3147             Jonathan Wakely  <jwakely@redhat.com>
3148
3149         * include/bits/deque.tcc (__lex_cmp_dit): New.
3150         (__lexicographical_compare_aux1): Define overloads for deque
3151         iterators.
3152         * include/bits/stl_algobase.h (__lexicographical_compare::__3way):
3153         New static member function.
3154         (__lexicographical_compare<true>::__3way): Likewise.
3155         (__lexicographical_compare<true>::__lc): Use __3way.
3156         (__lexicographical_compare_aux): Rename to
3157         __lexicographical_compare_aux1 and declare overloads for deque
3158         iterators.
3159         (__lexicographical_compare_aux): Define new forwarding function
3160         that calls __lexicographical_compare_aux1 and declare new overloads
3161         for safe iterators.
3162         (lexicographical_compare): Do not use __niter_base on
3163         parameters.
3164         * include/debug/safe_iterator.tcc
3165         (__lexicographical_compare_aux): Define overloads for safe
3166         iterators.
3167         * testsuite/25_algorithms/lexicographical_compare/1.cc: Add
3168         checks with random access iterators.
3169         * testsuite/25_algorithms/lexicographical_compare/deque_iterators/1.cc:
3170         New test.
3171
3172 2020-06-09  Jonathan Wakely  <jwakely@redhat.com>
3173
3174         * include/bits/stl_iterator.h (move_iterator::operator=): Define.
3175         * testsuite/24_iterators/move_iterator/dr3265.cc: New test.
3176
3177 2020-06-09  Jonathan Wakely  <jwakely@redhat.com>
3178
3179         * include/std/optional (bad_optional_access): Define default
3180         constructor and destructor as defaulted.
3181         * testsuite/20_util/optional/bad_access.cc: New test.
3182
3183 2020-06-08  Jonathan Wakely  <jwakely@redhat.com>
3184
3185         * testsuite/20_util/default_delete/48631_neg.cc: Adjust dg-error
3186         line number.
3187         * testsuite/20_util/default_delete/void_neg.cc: Likewise.
3188
3189 2020-06-08  Jonathan Wakely  <jwakely@redhat.com>
3190
3191         * include/bits/unique_ptr.h (operator<<): Define for C++20.
3192         * testsuite/20_util/unique_ptr/io/lwg2948.cc: New test.
3193
3194 2020-06-04  Jonathan Wakely  <jwakely@redhat.com>
3195
3196         * include/bits/iterator_concepts.h (__detail::__ptr, __detail::__ref)
3197         (__detail::__cat, __detail::__diff): Move to class scope in the
3198         relevant __iterator_traits specializations.
3199         (__iterator_traits<>): Use nested class templates instead of ones from
3200         namespace __detail.
3201         * include/bits/stl_iterator.h (__detail::__common_iter_ptr): Move to
3202         class scope in iterator_traits<common_iterator<I, S>>.
3203         (iterator_traits<common_iterator<I, S>>): Use nested class template
3204         instead of __detail::__common_iter_ptr.
3205
3206 2020-06-04  François Dumont  <fdumont@gcc.gnu.org>
3207
3208         * include/bits/stl_algo.h (__copy_n_a): Move to ...
3209         * include/bits/stl_algobase.h (__copy_n_a): ...here. Add __strict
3210         parameter.
3211         (__copy_n_a(istreambuf_iterator<>, _Size, _Deque_iterator<>, bool)):
3212         Declare.
3213         (__niter_base(const _Safe_iterator<_Ite, _Seq,
3214         random_access_iterator_tag>&)): Declare.
3215         (__copy_move_a2(istreambuf_iterator<>, istreambuf_iterator<>,
3216         _Deque_iterator<>)): Declare.
3217         * include/bits/deque.tcc
3218         (__copy_move_a2(istreambuf_iterator<>, istreambuf_iterator<>,
3219         _Deque_iterator<>)): New.
3220         (__copy_n_a(istreambuf_iterator<>, _Size, _Deque_iterator<>, bool)):
3221         New.
3222         * include/bits/streambuf_iterator.h
3223         (__copy_n_a(istreambuf_iterator<>, _Size, _CharT*, bool)): Adapt.
3224         * include/debug/safe_iterator.tcc (__niter_base): New.
3225         * testsuite/25_algorithms/copy/streambuf_iterators/char/4.cc
3226         (test03): New.
3227         * testsuite/25_algorithms/copy/streambuf_iterators/char/debug/deque_neg.cc:
3228         New test.
3229         * testsuite/25_algorithms/copy_n/debug/istreambuf_ite_deque_neg.cc:
3230         New test.
3231         * testsuite/25_algorithms/copy_n/istreambuf_iterator/2.cc: New test.
3232         * testsuite/25_algorithms/copy_n/istreambuf_iterator/deque.cc:
3233         New test.
3234
3235 2020-06-04  Jonathan Wakely  <jwakely@redhat.com>
3236
3237         * include/bits/ranges_algobase.h (__copy_n_fn): Only call
3238         ranges::copy for positive values.
3239         * include/bits/stl_algo.h (copy_n): Convert Size argument to an
3240         integral type and only call __copy_n for positive values.
3241         * testsuite/util/testsuite_iterators.h
3242         (random_access_iterator_wrapper::operator+=): Fix range check for
3243         negative values.
3244         (output_container, input_container, forward_container)
3245         (bidirectional_container, random_access_container): New alias
3246         templates.
3247         * testsuite/25_algorithms/copy_n/5.cc: New test.
3248
3249 2020-06-02  Jonathan Wakely  <jwakely@redhat.com>
3250
3251         PR libstdc++/90102
3252         * include/debug/deque (deque(const _Base&)): Replace parameter
3253         with a struct that wraps a const _Base&.
3254         * include/debug/forward_list (forward_list(_Base_ref)): New
3255         constructor.
3256         * include/debug/list (list(const _Base&)): Replace parameter
3257         with a struct that wraps a const _Base&.
3258         * include/debug/map.h (map(const _Base&)): Likewise.
3259         * include/debug/multimap.h (multimap(const _Base&)): Likewise.
3260         * include/debug/multiset.h (multiset(const _Base&)): Likewise.
3261         * include/debug/set.h (set(const _Base&)): Likewise.
3262         * include/debug/unordered_map (unordered_map(const _Base&))
3263         (unordered_multimap(const _Base&)): Likewise.
3264         * include/debug/unordered_set (unordered_set(const _Base&))
3265         (unordered_multiset(const _Base&)): Likewise.
3266         * testsuite/23_containers/vector/cons/destructible_debug_neg.cc:
3267         Adjust dg-error line number.
3268         * include/debug/vector (vector(const _Base&)): Likewise.
3269         * testsuite/23_containers/deque/debug/90102.cc: New test.
3270         * testsuite/23_containers/forward_list/debug/90102.cc: New test.
3271         * testsuite/23_containers/list/debug/90102.cc: New test.
3272         * testsuite/23_containers/map/debug/90102.cc: New test.
3273         * testsuite/23_containers/multimap/debug/90102.cc: New test.
3274         * testsuite/23_containers/multiset/debug/90102.cc: New test.
3275         * testsuite/23_containers/set/debug/90102.cc: New test.
3276         * testsuite/23_containers/unordered_map/debug/90102.cc: New test.
3277         * testsuite/23_containers/unordered_multimap/debug/90102.cc: New test.
3278         * testsuite/23_containers/unordered_multiset/debug/90102.cc: New test.
3279         * testsuite/23_containers/unordered_set/debug/90102.cc: New test.
3280         * testsuite/23_containers/vector/debug/90102.cc: New test.
3281
3282 2020-06-01  Jonathan Wakely  <jwakely@redhat.com>
3283
3284         PR libstdc++/95392
3285         * include/bits/fs_path.h (path::_S_to_string): Move to
3286         namespace-scope and rename to ...
3287         (__detail::__string_from_range): ... this.
3288         [WINDOWS] (__detail::__wstr_from_utf8): New function template to
3289         convert a char sequence containing UTF-8 to wstring.
3290         (path::_S_convert(Iter, Iter)): Adjust call to _S_to_string.
3291         (path::_S_convert_loc(Iter, Iter, const locale&)): Likewise.
3292         (u8path(InputIterator, InputIterator)) [WINDOWS]: Use
3293         __string_from_range to obtain a contiguous range and
3294         __wstr_from_utf8 to obtain a wide string.
3295         (u8path(const Source&)) [WINDOWS]: Use __effective_range to
3296         obtain a contiguous range and __wstr_from_utf8 to obtain a wide
3297         string.
3298         (path::_S_convert(const _EcharT*, const _EcharT)) [WINDOWS]:
3299         Use __wstr_from_utf8.
3300
3301 2020-06-01  Jonathan Wakely  <jwakely@redhat.com>
3302
3303         * testsuite/util/testsuite_iterators.h:
3304         (input_iterator_wrapper::operator++(int)): Return proxy object.
3305
3306 2020-06-01  Jonathan Wakely  <jwakely@redhat.com>
3307
3308         * doc/xml/manual/evolution.xml: Document deprecation of
3309         __is_nullptr_t and removal of std::allocator members.
3310         * doc/html/manual/api.html: Regenerate.
3311
3312 2020-06-01  Jonathan Wakely  <jwakely@redhat.com>
3313
3314         * doc/xml/manual/containers.xml: Replace <xref> with <link>.
3315         * doc/xml/manual/evolution.xml: Likewise.
3316         * doc/html/manual/api.html: Regenerate.
3317         * doc/html/manual/containers.html: Regenerate.
3318
3319 2020-06-01  Gerald Pfeifer  <gerald@pfeifer.com>
3320
3321         * doc/xml/faq.xml: Adjust Valgrind reference and remove another.
3322         * doc/html/faq.html: Regenerate.
3323
3324 2020-06-01  Gerald Pfeifer  <gerald@pfeifer.com>
3325
3326         * doc/xml/manual/policy_data_structures_biblio.xml: Remove
3327         stray change.
3328
3329 2020-06-01  Gerald Pfeifer  <gerald@pfeifer.com>
3330
3331         * doc/xml/manual/policy_data_structures_biblio.xml: Switch
3332         www.cs.princeton.edu to https.
3333         * doc/html/manual/policy_data_structures.html: Regenerate.
3334
3335 2020-05-31  Douglas B Rupp  <douglas.b.rupp@gmail.com>
3336
3337         * crossconfig.m4 (<*-vxworks>): Check for more math decls.
3338         * configure: Rebuild.
3339
3340 2020-05-29  H.J. Lu  <hjl.tools@gmail.com>
3341
3342         PR bootstrap/95413
3343         * configure: Regenerated.
3344
3345 2020-05-29  François Dumont  <fdumont@gcc.gnu.org>
3346
3347         PR libstdc++/95079
3348         * include/bits/hashtable_policy.h (_Insert_base<>::try_emplace): New.
3349         * include/bits/unordered_map.h (unordered_map<>::try_emplace): Adapt.
3350         (unordered_map<>::insert_or_assign): Adapt.
3351
3352 2020-05-27  Jonathan Wakely  <jwakely@redhat.com>
3353
3354         PR libstdc++/95282
3355         * include/bits/atomic_base.h (__atomic_impl::load): Add
3356         cv-qualifiers to parameter so that _Tp is deduced as the
3357         unqualified type.
3358         * testsuite/29_atomics/atomic_float/95282.cc: New test.
3359
3360 2020-05-27  Jonathan Wakely  <jwakely@redhat.com>
3361
3362         PR libstdc++/95322
3363         * include/std/ranges (transform_view::_Sentinel): Allow hidden
3364         friends to work with _Iterator<true> and _Iterator<false>.
3365         (join_view::_Sentinel): Likewise.
3366         * testsuite/std/ranges/adaptors/95322.cc: New test.
3367
3368 2020-05-27  Jonathan Wakely  <jwakely@redhat.com>
3369
3370         PR libstdc++/94354
3371         * include/bits/stl_iterator.h (reverse_iterator): Fix comparison
3372         operators to use the correct operations on the underlying
3373         iterators.
3374         * testsuite/24_iterators/reverse_iterator/rel_ops.cc: New test.
3375
3376 2020-05-27  Jonathan Wakely  <jwakely@redhat.com>
3377
3378         * testsuite/18_support/comparisons/categories/zero_neg.cc: New test.
3379
3380 2020-05-26  Patrick Palka  <ppalka@redhat.com>
3381
3382         PR libstdc++/95322
3383         * include/bits/stl_iterator.h (__detail::_Common_iter_proxy):
3384         Remove and instead define it ...
3385         (common_iterator::_Proxy): ... here.
3386         (common_iterator::operator->): Use it.
3387         * testsuite/24_iterators/common_iterator/2.cc: New test.
3388         * testsuite/std/ranges/adaptors/95322.cc: New test.
3389
3390 2020-05-23  Patrick Palka  <ppalka@redhat.com>
3391
3392         PR libstdc++/93978
3393         * testsuite/std/ranges/adaptors/93978.cc: Add -Wall to
3394         dg-additional-options.  Avoid unused-but-set-variable warning.
3395
3396 2020-05-23  Jonathan Wakely  <jwakely@redhat.com>
3397
3398         PR libstdc++/95289
3399         * include/debug/helper_functions.h (__get_distance): Only declare
3400         as a constexpr function for C++14 and up.
3401         * testsuite/25_algorithms/copy/debug/95289.cc: New test.
3402
3403         * include/bits/fs_path.h (__detail::_S_range_begin)
3404         (__detail::_S_range_end, path::_S_string_from_iter): Replace with
3405         overloaded function template __detail::__effective_range.
3406         (__detail::__effective_range): New overloaded function template to
3407         create a basic_string or basic_string_view for an effective range.
3408         (__detail::__value_type_is_char): Use __detail::__effective_range.
3409         Do not use remove_const on value type.
3410         (__detail::__value_type_is_char_or_char8_t): Likewise.
3411         (path::path(const Source&, format))
3412         (path::path(const Source&, const locale&))
3413         (path::operator/=(const Source&), path::append(const Source&))
3414         (path::concat(const Source&)): Use __detail::__effective_range.
3415         (path::_S_to_string(InputIterator, InputIterator)): New function
3416         template to create a string view if possible, or string otherwise.
3417         (path::_S_convert): Add overloads that convert a string returned
3418         by __detail::__effective_range. Use if-constexpr to inline conversion
3419         logic from all overloads of _Cvt::_S_convert.
3420         (path::_S_convert_loc): Add overload that converts a string. Use
3421         _S_to_string to avoid allocation when possible.
3422         (path::_Cvt): Remove.
3423         (path::operator+=(CharT)): Remove indirection through path::concat.
3424         * include/experimental/bits/fs_path.h (path::_S_convert_loc): Add
3425         overload for non-const pointers, to avoid constructing a std::string.
3426         * src/c++17/fs_path.cc (path::_S_convert_loc): Replace conditional
3427         compilation with call to _S_convert.
3428
3429         * include/bits/fs_path.h (__detail::_S_range_begin)
3430         (__detail::_S_range_end): Remove unintentional static specifiers.
3431         * include/experimental/bits/fs_path.h (__detail::_S_range_begin)
3432         (__detail::_S_range_end): Likewise.
3433
3434         * include/bits/fs_path.h (filesystem::__detail::__is_encoded_char):
3435         Replace alias template with variable template. Don't remove const.
3436         (filesystem::__detail::__is_path_src): Replace overloaded function
3437         template with variable template and specializations.
3438         (filesystem::__detail::__is_path_iter_src): Replace alias template
3439         with class template.
3440         (filesystem::__detail::_Path): Use __is_path_src. Remove support for
3441         iterator pairs.
3442         (filesystem::__detail::_Path2): New alias template for checking
3443         InputIterator requirements.
3444         (filesystem::__detail::__constructible_from): Remove.
3445         (filesystem::path): Replace _Path<Iter, Iter> with _Path2<Iter>.
3446         * testsuite/27_io/filesystem/path/construct/80762.cc: Check with two
3447         constructor arguments of void and void* types.
3448
3449 2020-05-21  Matthias Kretz  <kretz@kde.org>
3450
3451         * testsuite/Makefile.am: Remove dup target_triplet and set tool,
3452         allowing runtest to work without arguments.
3453         * testsuite/Makefile.in: Regenerate.
3454
3455 2020-05-21  Jonathan Wakely  <jwakely@redhat.com>
3456
3457         PR libstdc++/93983
3458         * include/bits/iterator_concepts.h (__detail::__cpp17_iterator):
3459         Reorder constraints to avoid recursion when constructors use
3460         iterator_traits (LWG 3420).
3461         * testsuite/24_iterators/customization_points/lwg3420.cc: New test.
3462
3463         * include/experimental/socket (basic_socket::is_open()
3464         (basic_socket_acceptor::is_open()): Use _GLIBCXX_NODISCARD macro.
3465
3466         * include/experimental/bits/net.h (__endpoint, __protocol)
3467         (__acceptable_protocol, __inet_protocol): New concepts.
3468         (__detail::__is_endpoint): Move trait from <experimental/socket>.
3469         (__is_protocol, __is_acceptable_protocol, __is_inet_protocol): New
3470         traits.
3471         (__endpoint, __protocol, __acceptable_protocol): New variable
3472         templates.
3473         * include/experimental/socket (__is_endpoint): Move to net.h header.
3474         (basic_socket, basic_socket_acceptor): Check requirements.
3475
3476         * include/experimental/executor (use_future_t::use_future_t()): Fix
3477         incorrect noexcept-specifier.
3478         * include/experimental/internet (basic_resolver_results): Adjust
3479         whitespace.
3480         * include/experimental/socket (__basic_socket_impl::release): Add
3481         member function.
3482         (basic_socket(io_context&, const endpoint_type&)): Fix argument to
3483         target constructor.
3484         (basic_socket::release(), basic_socket::release(error_code&)): Add
3485         missing member functions.
3486         (basic_socket::is_open()): Add nodiscard attribute.
3487         (basic_socket::close(error_code&)): Pass argument to base function.
3488         (basic_socket_acceptor::release())
3489         (basic_socket_acceptor::release(error_code&)): Add missing member
3490         functions.
3491         (basic_socket_acceptor::is_open()): Add nodiscard attribute.
3492         (basic_socket_streambuf::error()): Add noexcept.
3493         (basic_socket_iostream::error()): Likewise.
3494         * testsuite/experimental/net/socket/basic_socket.cc: New test.
3495
3496         * include/experimental/buffer: Replace typedefs with
3497         alias-declarations.
3498         * include/experimental/executor: Likewise.
3499         * include/experimental/internet: Likewise.
3500         * include/experimental/socket: Likewise.
3501         * include/experimental/timer: Likewise.
3502
3503 2020-05-19  Jonathan Wakely  <jwakely@redhat.com>
3504
3505         PR libstdc++/94087
3506         * src/c++11/random.cc (__x86_rdseed): Allow fallback function to be
3507         passed in.
3508         (__x86_rdseed_rdrand): New function that uses rdseed with rdrand
3509         fallback.
3510         (random_device::_M_init): Use __x86_rdseed_rdrand when both
3511         instructions are available.
3512         * testsuite/26_numerics/random/random_device/94087.cc: New test.
3513
3514 2020-05-19  Patrick Palka  <ppalka@redhat.com>
3515
3516         PR c++/66439
3517         * testsuite/20_util/pair/astuple/get_neg.cc: Prune "type/value
3518         mismatch" messages.
3519         * testsuite/20_util/tuple/element_access/get_neg.cc: Likewise.
3520
3521 2020-05-15  H.J. Lu  <hongjiu.lu@intel.com>
3522
3523         PR bootstrap/95147
3524         * configure: Regenerated.
3525
3526 2020-05-14  H.J. Lu  <hongjiu.lu@intel.com>
3527
3528         * configure: Regenerated.
3529
3530 2020-05-13  Alexandre Oliva <oliva@adacore.com>
3531
3532         PR libstdc++/77691
3533         * include/experimental/memory_resource
3534         (__resource_adaptor_imp::do_allocate): Handle max_align_t on
3535         x86-vxworks as on x86-solaris.
3536         (__resource_adaptor_imp::do_deallocate): Likewise.
3537         * testsuite/experimental/memory_resource/new_delete_resource.cc:
3538         Drop xfail.
3539         (BAD_MAX_ALIGN_T): Define on x86-vxworks as on x86-solaris.
3540         (test03): Drop max-align test for char-aligned alloc.
3541
3542 2020-05-08  Ulrich Drepper  <drepper@redhat.com>
3543
3544         * include/bits/atomic_base.h (atomic_flag): Implement test member
3545         function.
3546         * include/std/version: Define __cpp_lib_atomic_flag_test.
3547         * testsuite/29_atomics/atomic_flag/test/explicit.cc: New file.
3548         * testsuite/29_atomics/atomic_flag/test/implicit.cc: New file.
3549
3550 2020-05-07  Jonathan Wakely  <jwakely@redhat.com>
3551
3552         PR libstdc++/94971 (partial)
3553         * include/bits/ranges_algo.h (ranges::__sample_fn): Qualify
3554         std::sample using macro to work in parallel mode.
3555         (__sort_fn): Likewise for std::sort.
3556         (ranges::__nth_element_fn): Likewise for std::nth_element.
3557         * include/bits/stl_algobase.h (lexicographical_compare_three_way):
3558         Likewise for std::__min_cmp.
3559         * include/parallel/algobase.h (lexicographical_compare_three_way):
3560         Add to namespace std::__parallel.
3561
3562         PR c/92472
3563         * include/parallel/multiway_merge.h (_GuardedIterator::operator*)
3564         (_GuardedIterator::operator _RAIter, _UnguardedIterator::operator*)
3565         (_UnguardedIterator::operator _RAIter): Add const qualifier.
3566         (operator<(_GuardedIterator&, _GuardedIterator&)
3567         (operator<=(_GuardedIterator&, _GuardedIterator&)
3568         (operator<(_UnguardedIterator&, _UnguardedIterator&)
3569         (operator<=(_UnguardedIterator&, _UnguardedIterator&): Change
3570         parameters to const references.
3571
3572 2020-05-07  Eric Botcazou  <ebotcazou@adacore.com>
3573
3574         * config/abi/post/sparc64-linux-gnu/baseline_symbols.txt: Update.
3575         * config/abi/post/sparc64-linux-gnu/32/baseline_symbols.txt: Likewise.
3576
3577 2020-05-06  François Dumont  <fdumont@gcc.gnu.org>
3578
3579         * include/bits/stl_algobase.h (struct _Bit_iterator): New declaration.
3580         (std::__fill_a1(_Bit_iterator, _Bit_iterator, const bool&)): Likewise.
3581         * include/bits/stl_bvector.h (__fill_bvector): Move outside
3582         _GLIBCXX_STD_C namespace.
3583         (fill(_Bit_iterator, _Bit_iterator, const bool&)): Likewise and rename
3584         into...
3585         (__fill_a1): ...this.
3586         * testsuite/25_algorithms/fill/bvector/1.cc: New.
3587
3588 2020-05-06  H.J. Lu  <hongjiu.lu@intel.com>
3589
3590         * config/abi/post/x86_64-linux-gnu/x32/baseline_symbols.txt: Updated.
3591
3592 2020-05-06  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
3593
3594         * config/abi/post/i386-solaris/baseline_symbols.txt: Regenerate.
3595         * config/abi/post/i386-solaris/amd64/baseline_symbols.txt:
3596         Likewise.
3597         * config/abi/post/sparc-solaris/baseline_symbols.txt: Likewise.
3598         * config/abi/post/sparc-solaris/sparcv9/baseline_symbols.txt:
3599         Likewise.
3600
3601 2020-05-06  Martin Liska  <mliska@suse.cz>
3602
3603         Revert:
3604         2020-05-05  Martin Liska  <mliska@suse.cz>
3605         PR c/92472
3606         * include/parallel/multiway_merge.h:
3607         Use const for _Compare template argument.
3608
3609 2020-05-06  Jonathan Wakely  <jwakely@redhat.com>
3610
3611         * doc/xml/manual/abi.xml (abi.versioning.history): Document library
3612         versions for GCC 9.[123] and 10.1 releases.
3613         * doc/html/*: Regenerate.
3614
3615 2020-05-06  Jakub Jelinek  <jakub@redhat.com>
3616
3617         * config/abi/post/x86_64-linux-gnu/baseline_symbols.txt: Update.
3618         * config/abi/post/x86_64-linux-gnu/32/baseline_symbols.txt: Update.
3619         * config/abi/post/i386-linux-gnu/baseline_symbols.txt: Update.
3620         * config/abi/post/i486-linux-gnu/baseline_symbols.txt: Update.
3621         * config/abi/post/aarch64-linux-gnu/baseline_symbols.txt: Update.
3622         * config/abi/post/s390x-linux-gnu/baseline_symbols.txt: Update.
3623         * config/abi/post/powerpc64-linux-gnu/baseline_symbols.txt: Update.
3624
3625 2020-05-05  Martin Liska  <mliska@suse.cz>
3626
3627         PR c/92472
3628         * include/parallel/multiway_merge.h:
3629         Use const for _Compare template argument.
3630
3631 2020-05-04  Fangrui Song  <maskray@google.com>
3632
3633         * libsupc++/cxxabi.h (__cxa_finalize): Fix return type.
3634
3635 2020-05-04  Jonathan Wakely  <jwakely@redhat.com>
3636
3637         * doc/xml/faq.xml: Use working link for SGI STL FAQ.
3638         * doc/html/*: Regenerate.
3639
3640         PR libstdc++/94906
3641         * src/c++17/memory_resource.cc
3642         (monotonic_buffer_resource::_Chunk::release): Use size_t for shift
3643         operands.
3644
3645 2020-05-04  Nathan Sidwell  <nathan@acm.org>
3646
3647         PR libstdc++/94747
3648         * libsupc++/dyncast.cc (__dynamic_cast): Cast offsetof to
3649         ptrdiff_t before negation, to show intent more clearly.
3650
3651 2020-05-04  Jonathan Wakely  <jwakely@redhat.com>
3652
3653         PR libstdc++/94936
3654         * src/c++17/memory_resource.cc (synchronized_pool_resource::_TPools):
3655         Add comment about single-threaded behaviour.
3656         (synchronized_pool_resource::_TPools::move_nonempty_chunks()): Hoist
3657         class member access out of loop.
3658         (synchronized_pool_resource::synchronized_pool_resource())
3659         (synchronized_pool_resource::~synchronized_pool_resource())
3660         (synchronized_pool_resource::release()): Check __gthread_active_p
3661         before creating and/or deleting the thread-specific data key.
3662         (synchronized_pool_resource::_M_thread_specific_pools()): Adjust
3663         assertions.
3664         (synchronized_pool_resource::do_allocate(size_t, size_t)): Add fast
3665         path for single-threaded case.
3666         (synchronized_pool_resource::do_deallocate(void*, size_t, size_t)):
3667         Likewise. Return if unable to find a pool that owns the allocation.
3668         * testsuite/20_util/synchronized_pool_resource/allocate_single.cc:
3669         New test.
3670         * testsuite/20_util/synchronized_pool_resource/cons_single.cc: New
3671         test.
3672         * testsuite/20_util/synchronized_pool_resource/release_single.cc: New
3673         test.
3674
3675 2020-05-03  Jonathan Wakely  <jwakely@redhat.com>
3676
3677         PR libstdc++/94933
3678         * include/bits/stl_algobase.h (__fill_a1): Make overload for byte types
3679         usable in constant expressions.
3680         * testsuite/25_algorithms/fill_n/constexpr.cc: Test with bytes and
3681         non-scalars.
3682
3683 2020-05-01  Jonathan Wakely  <jwakely@redhat.com>
3684
3685         PR libstdc++/94901
3686         * testsuite/17_intro/badnames.cc: Test values between _E9 and _E24 too.
3687
3688 2020-05-01  Jonathan Wakely  <jwakely@redhat.com>
3689             Patrick Palka  <ppalka@redhat.com>
3690
3691         PR libstdc++/92894
3692         * include/bits/iterator_concepts.h (ranges::__cust_imove::_IMove):
3693         Add trait to determine return type and an alias for it.
3694         (ranges::__cust_imove::_IMove::operator()): Use __result instead of
3695         deduced return type.
3696         (iter_rvalue_reference_t): Use _IMove::__type instead of checking
3697         the result of ranges::iter_move.
3698         (__detail::__indirectly_readable_impl): Use iter_rvalue_reference_t
3699         instead of checking the result of ranges::iter_move.
3700         * testsuite/24_iterators/customization_points/92894.cc: New test.
3701         * testsuite/24_iterators/indirect_callable/92894.cc: New test.
3702
3703 2020-05-01  Jonathan Wakely  <jwakely@redhat.com>
3704
3705         PR libstdc++/94901
3706         * include/std/type_traits (__is_complete_or_unbounded): Replace
3707         BADNAME _T with _Tp.
3708         * testsuite/17_intro/badnames.cc: New test.
3709
3710 2020-04-30  Jonathan Wakely  <jwakely@redhat.com>
3711
3712         PR libstdc++/89510
3713         * include/bits/alloc_traits.h (allocator_traits::_S_construct)
3714         (allocator_traits::_S_destroy)
3715         (allocator_traits<allocator<T>>::construct): Use traits in
3716         noexcept-specifiers.
3717         * include/bits/allocator.h (allocator<void>::construct)
3718         (allocator<void>::destroy): Likewise.
3719         * include/ext/malloc_allocator.h (malloc_allocator::construct)
3720         (malloc_allocator::destroy): Likewise.
3721         * include/ext/new_allocator.h (new_allocator::construct)
3722         (new_allocator::destroy): Likewise.
3723         * testsuite/20_util/allocator/89510.cc: New test.
3724         * testsuite/ext/malloc_allocator/89510.cc: New test.
3725         * testsuite/ext/new_allocator/89510.cc: New test.
3726
3727 2020-04-29  Jonathan Wakely  <jwakely@redhat.com>
3728
3729         PR libstdc++/94854
3730         * include/bits/basic_string.tcc: Update comment about explicit
3731         instantiations.
3732
3733 2020-04-28  Jonathan Wakely  <jwakely@redhat.com>
3734
3735         PR libstdc++/91480
3736         * include/bits/allocator.h (__cpp_lib_allocator_is_always_equal):
3737         Remove non-standard macro.
3738         * include/bits/stl_iterator.h (__cpp_lib_constexpr_iterator): Define
3739         to indicate P1032R1 support.
3740         * include/bits/stl_pair.h (__cpp_lib_constexpr_utility): Likewise.
3741         * include/std/string_view (__cpp_lib_constexpr_string_view): Likewise.
3742         * include/std/tuple (__cpp_lib_constexpr_tuple): Likewise.
3743         * include/std/version (__cpp_lib_allocator_is_always_equal): Remove.
3744         (__cpp_lib_constexpr_iterator, __cpp_lib_constexpr_string_view)
3745         (__cpp_lib_constexpr_tuple, __cpp_lib_constexpr_utility): Define.
3746         * testsuite/20_util/function_objects/constexpr_searcher.cc: Check
3747         feature test macro.
3748         * testsuite/20_util/tuple/cons/constexpr_allocator_arg_t.cc: Likewise.
3749         * testsuite/21_strings/basic_string_view/operations/copy/char/
3750         constexpr.cc: Likewise.
3751         * testsuite/24_iterators/insert_iterator/constexpr.cc: Likewise.
3752
3753         PR libstdc++/94831
3754         * include/bits/alloc_traits.h (_S_construct): Restore placement
3755         new-expression for C++11/14/17 and call std::construct_at directly
3756         for C++20.
3757         * include/bits/stl_construct.h (_Construct): Revert to non-constexpr
3758         function returning void.
3759         * testsuite/20_util/specialized_algorithms/
3760         uninitialized_value_construct/94831.cc: New test.
3761         * testsuite/23_containers/vector/cons/94831.cc: New test.
3762
3763 2020-04-28  Patrick Palka  <ppalka@redhat.com>
3764
3765         LWG 3433 subrange::advance(n) has UB when n < 0
3766         * include/std/ranges (subrange::prev): Fix typo.
3767         (subrange::advance): Handle a negative argument as per the proposed
3768         resolution of LWG 3433.
3769         * testsuite/std/ranges/subrange/lwg3433.cc: New test.
3770
3771 2020-04-28  Jonathan Wakely  <jwakely@redhat.com>
3772             Iain Sandoe  <iain@sandoe.co.uk>
3773
3774         PR c++/94759
3775         * include/std/coroutine: Implement handing for non-
3776         class coroutine return types.
3777
3778 2020-04-24  Jonathan Wakely  <jwakely@redhat.com>
3779
3780         * include/experimental/executor (service_already_exists): Make default
3781         constructor public (LWG 3414).
3782         * testsuite/experimental/net/execution_context/make_service.cc: Check
3783         the service_already_exists can be default constructed.
3784
3785 2020-04-24  Kamlesh Kumar  <kamleshbhalui@gmail.com>
3786             Jonathan Wakely  <jwakely@redhat.com>
3787
3788         PR libstdc++/90415
3789         PR libstdc++/92156
3790         * include/std/any (any): Rename template parameters for consistency
3791         with the standard.
3792         (any::_Decay): Rename to _Decay_if_not_any.
3793         (any::any(T&&):: Remove is_constructible from constraints. Remove
3794         non-standard overload.
3795         (any::any(in_place_type_t<T>, Args&&...))
3796         (any::any(in_place_type_t<T>, initializer_list<U>, Args&&...))
3797         (any::emplace(Args&&...))
3798         (any::emplace(initializer_list<U>, Args&&...)):
3799         Use decay_t instead of _Decay.
3800         * testsuite/20_util/any/cons/90415.cc: New test.
3801         * testsuite/20_util/any/cons/92156.cc: New Test.
3802         * testsuite/20_util/any/misc/any_cast_neg.cc: Make dg-error directives
3803         more robust.
3804         * testsuite/20_util/any/modifiers/92156.cc: New test.
3805
3806 2020-04-23  Jonathan Wakely  <jwakely@redhat.com>
3807
3808         * doc/xml/manual/status_cxx2020.xml: Update C++20 status table.
3809         * doc/html/*: Regenerate.
3810
3811         * include/bits/stl_iterator.h (__cpp_lib_array_constexpr): Revert
3812         value for C++17 to 201803L because P0858R0 is supported for C++17.
3813         * include/std/version (__cpp_lib_array_constexpr): Likewise.
3814         * testsuite/23_containers/array/element_access/constexpr_c++17.cc:
3815         Check for value corresponding to P0031R0 features being tested.
3816         * testsuite/23_containers/array/requirements/constexpr_iter.cc:
3817         Check for value corresponding to P0858R0 features being tested.
3818
3819         * include/std/version (__cpp_lib_three_way_comparison): Define for
3820         freestanding builds.
3821
3822 2020-04-23  Thomas Rodgers  <rodgert@appliantology.com>
3823
3824         * include/experimental/net/executor (system_context): Mark
3825         system_context::system_context() = delete.
3826         * testsuite/experimental/net/executor/1.cc: Add new
3827         test to check system_context is not default constructible.
3828
3829 2020-04-23  Iain Sandoe  <iain@sandoe.co.uk>
3830
3831         * include/std/coroutine: Update the inline namespace to __n4861.
3832         Add the __cpp_lib_coroutine define, set to 201902L.
3833         * include/std/version: Add __cpp_lib_coroutine, set to 201902L.
3834
3835 2020-04-22  Jonathan Wakely  <jwakely@redhat.com>
3836
3837         * include/std/execution (__cpp_lib_execution): Define to indicate
3838         support for P0024R2 and P1001R2.
3839         * include/std/version (__cpp_lib_execution): Define.
3840         * testsuite/25_algorithms/pstl/feature_test.cc: Only test macro
3841         defined by <algorithm>, move other tests to new tests ...
3842         * testsuite/25_algorithms/pstl/feature_test-2.cc: New test.
3843         * testsuite/25_algorithms/pstl/feature_test-3.cc: New test.
3844         * testsuite/25_algorithms/pstl/feature_test-4.cc: New test.
3845         * testsuite/25_algorithms/pstl/feature_test-5.cc: New test.
3846
3847         * include/bits/stl_iterator.h (__cpp_lib_array_constexpr): Define
3848         different values for C++17 and C++20, to indicate different feature
3849         sets. Update value for C++20 to indicate P1032R1 support.
3850         * include/std/version (__cpp_lib_array_constexpr): Likewise.
3851         * testsuite/23_containers/array/comparison_operators/constexpr.cc:
3852         Check feature test macro.
3853         * testsuite/23_containers/array/element_access/constexpr_c++17.cc:
3854         New test.
3855         * testsuite/23_containers/array/requirements/constexpr_fill.cc: Check
3856         feature test macro.
3857         * testsuite/23_containers/array/requirements/constexpr_iter.cc: Test
3858         in C++17 mode and check feature test macro.
3859
3860         * include/std/utility (__cpp_lib_constexpr_algorithms): Do not define
3861         here.
3862         * testsuite/20_util/exchange/constexpr.cc: Do not expect macro to be
3863         defined by <utility>.
3864
3865         * include/std/functional (__cpp_lib_concepts): Update macro value to
3866         indicate P1964R2 support.
3867         * include/std/version (__cpp_lib_concepts): Likewise.
3868         * testsuite/std/concepts/1.cc: Adjust expected value.
3869         * testsuite/std/concepts/2.cc: Likewise.
3870
3871         * include/std/functional (__cpp_lib_constexpr_invoke): Rename to
3872         __cpp_lib_constexpr_functional.
3873         * include/std/version (__cpp_lib_constexpr_invoke): Likewise.
3874         * testsuite/20_util/function_objects/invoke/constexpr.cc: Adjust.
3875
3876         * include/bits/ptr_traits.h (__cpp_lib_constexpr_memory): Define to
3877         indicate P1006R1 support.
3878         (__cpp_lib_to_address): Define to indicate P0653R2 support.
3879         * include/bits/range_access.h (__cpp_lib_ssize): Define to indicate
3880         P1227R2 support.
3881         * include/bits/ranges_algo.h (__cpp_lib_shift): Define to indicate
3882         P0769R2 support.
3883         * include/std/atomic (__cpp_lib_atomic_float): Define to indicate
3884         P0020R6 support.
3885         * include/std/memory (__cpp_lib_assume_aligned): Define to indicate
3886         P1007R3 support.
3887         * include/std/memory_resource (__cpp_lib_polymorphic_allocator):
3888         Define to indicate P0339R6 support.
3889         * include/std/string_view (__cpp_lib_starts_ends_with): Define to
3890         indicate P0457R2 support.
3891         * include/std/type_traits (__cpp_lib_is_nothrow_convertible): Define
3892         to indicate P0758R1 support.
3893         (__cpp_lib_remove_cvref): Define to indicate P0550R2 support.
3894         (__cpp_lib_type_identity): Define to indicate P0887R1 support.
3895         * include/std/version (__cpp_lib_atomic_float)
3896         (__cpp_lib_is_nothrow_convertible, __cpp_lib_remove_cvref)
3897         (__cpp_lib_type_identity, __cpp_lib_assume_aligned)
3898         (__cpp_lib_constexpr_memory, __cpp_lib_polymorphic_allocator)
3899         (__cpp_lib_shift, __cpp_lib_ssize, __cpp_lib_starts_ends_with)
3900         (__cpp_lib_to_address): Define.
3901         * testsuite/20_util/to_address/1_neg.cc: Adjust dg-error line number.
3902
3903         * include/bits/stl_map.h (__cpp_lib_map_insertion): Remove old
3904         macro.
3905         * include/bits/unordered_map.h (__cpp_lib_unordered_map_insertion):
3906         Likewise.
3907         * include/std/version (__cpp_lib_map_insertion)
3908         (__cpp_lib_unordered_map_insertion): Remove.
3909
3910         * include/std/condition_variable (__cpp_lib_jthread): Remove
3911         redundant definition.
3912         * include/std/stop_token (__cpp_lib_jthread): Update macro value to
3913         indicate P1869R1 support.
3914         * include/std/version (__cpp_lib_jthread): Update value.
3915         * testsuite/30_threads/condition_variable_any/stop_token/1.cc: Check
3916         for updated macro value.
3917         * testsuite/30_threads/condition_variable_any/stop_token/2.cc:
3918         Likewise.
3919         * testsuite/30_threads/jthread/1.cc: Likewise.
3920         * testsuite/30_threads/jthread/2.cc: Likewise.
3921         * testsuite/30_threads/stop_token/1.cc: Likewise.
3922         * testsuite/30_threads/stop_token/2.cc: Likewise.
3923
3924         * testsuite/21_strings/basic_string/erasure.cc: Check for
3925         __cpp_lib_erase_if macro.
3926         * testsuite/23_containers/deque/erasure.cc: Add header name to #error
3927         messages.
3928         * testsuite/23_containers/forward_list/erasure.cc: Likewise.
3929         * testsuite/23_containers/list/erasure.cc: Likewise.
3930         * testsuite/23_containers/map/erasure.cc: Likewise.
3931         * testsuite/23_containers/set/erasure.cc: Likewise.
3932         * testsuite/23_containers/unordered_map/erasure.cc: Likewise.
3933         * testsuite/23_containers/unordered_set/erasure.cc: Likewise.
3934         * testsuite/23_containers/vector/erasure.cc: Likewise.
3935
3936 2020-04-21  Jonathan Wakely  <jwakely@redhat.com>
3937
3938         * include/bits/stl_iterator.h (__normal_iterator): Use synth-three-way
3939         to define operator<=>.
3940         * testsuite/24_iterators/normal_iterator/cmp_c++20.cc: New test.
3941
3942         * doc/Makefile.am (xml_sources_manual): Add missing XML files.
3943         * doc/Makefile.in: Regenerate.
3944         * doc/xml/manual/status_cxx1998.xml: Refer to "this section" instead
3945         of "this page".
3946         * doc/xml/manual/status_cxx2011.xml: Formatting and other corrections
3947         to the C++11 status table.
3948         * doc/xml/manual/status_cxx2014.xml: Replace list of C++14 feature
3949         proposals with table matching contents of the C++14 standard.
3950         * doc/xml/manual/status_cxx2017.xml: Add table matching contents of
3951         the C++17 standard.
3952         * doc/html/*: Regenerate.
3953
3954         PR c++/94149
3955         * include/std/type_traits (__is_nt_constructible_impl): Add partial
3956         specializations for bounded arrays with non-empty initializers.
3957         * testsuite/20_util/is_nothrow_constructible/value_c++20.cc: New test.
3958
3959 2020-04-20  Thomas Rodgers  <trodgers@redhat.com>
3960
3961         * testsuite/lib/libstdc++.exp: Add additional_flags=
3962         -DTBB_SUPRESS_DEPRECATED_MESSAGES=1 to suppress warnings when
3963         compiling with a newer Thread Building Blocks.
3964
3965 2020-04-20  Jonathan Wakely  <jwakely@redhat.com>
3966
3967         * testsuite/24_iterators/istreambuf_iterator/sentinel.cc: New test.
3968
3969         * testsuite/20_util/is_constructible/51185.cc: Make test class a
3970         non-aggregate so that the test verifies the same thing in all -std
3971         modes.
3972         * testsuite/20_util/is_constructible/value-2.cc: Adjust expected
3973         results for some types when paren-init for aggregates is supported.
3974
3975         * include/std/version (__cpp_lib_three_way_comparison): Update value.
3976         * libsupc++/compare (__cpp_lib_three_way_comparison): Likewise.
3977         (__detail::__synth3way): Add noexcept-specifier.
3978
3979         * include/bits/stl_map.h (map): Define operator<=> and remove
3980         operator< for C++20.
3981         * include/bits/stl_multimap.h (multimap): Likewise.
3982         * include/bits/stl_multiset.h (multiset): Likewise.
3983         * include/bits/stl_set.h (set): Likewise.
3984         * include/bits/stl_tree.h (_Rb_tree): Likewise.
3985         (_Rb_tree_iterator, _Rb_tree_const_iterator): Remove redundant
3986         operator!= for C++20.
3987         * include/debug/map.h (__gnu_debug::map): Define operator<=> for C++20.
3988         * include/debug/multimap.h (__gnu_debug::multimap): Likewise.
3989         * include/debug/multiset.h (__gnu_debug::multiset): Likewise.
3990         * include/debug/set.h (__gnu_debug::set): Likewise.
3991         * testsuite/23_containers/map/operators/cmp_c++20.cc: New test.
3992         * testsuite/23_containers/multimap/operators/cmp_c++20.cc: New test.
3993         * testsuite/23_containers/multiset/operators/cmp_c++20.cc: New test.
3994         * testsuite/23_containers/set/operators/cmp_c++20.cc: New test.
3995
3996 2020-04-20  Matthias Kretz  <kretz@kde.org>
3997
3998         * testsuite/lib/libstdc++.exp: Avoid illegal argument to verbose.
3999
4000 2020-04-19  Jonathan Wakely  <jwakely@redhat.com>
4001
4002         * include/bits/stl_queue.h (queue): Define operator<=> for C++20.
4003         * include/bits/stl_stack.h (stack): Likewise.
4004         * testsuite/23_containers/queue/cmp_c++20.cc: New test.
4005         * testsuite/23_containers/stack/cmp_c++20.cc: New test.
4006
4007         * include/bits/unordered_map.h (unordered_map, unordered_multimap):
4008         Remove redundant operator!= for C++20.
4009         * include/bits/unordered_set.h (unordered_set, unordered_multiset):
4010         Likewise.
4011         * include/debug/unordered_map (unordered_map, unordered_multimap):
4012         Likewise.
4013         * include/debug/unordered_set (unordered_set, unordered_multiset):
4014         Likewise.
4015
4016         PR other/94629
4017         * include/debug/formatter.h (_Error_formatter::_Parameter): Fix
4018         redundant assignment in constructor.
4019
4020 2020-04-18  Jonathan Wakely  <jwakely@redhat.com>
4021
4022         * include/std/chrono (duration, time_point): Define operator<=> and
4023         remove redundant operator!= for C++20.
4024         * testsuite/20_util/duration/comparison_operators/three_way.cc: New
4025         test.
4026         * testsuite/20_util/time_point/comparison_operators/three_way.cc: New
4027         test.
4028
4029         * testsuite/util/native_type/native_priority_queue.hpp: Use
4030         allocator_traits to rebind allocator.
4031
4032 2020-04-17  Jonathan Wakely  <jwakely@redhat.com>
4033
4034         * include/bits/forward_list.h (forward_list): Define operator<=> and
4035         remove redundant comparison operators for C++20.
4036         * include/bits/stl_bvector.h (vector<bool, Alloc>): Likewise.
4037         * include/bits/stl_deque.h (deque): Likewise.
4038         * include/bits/stl_iterator.h (__normal_iterator): Likewise.
4039         * include/bits/stl_list.h (list): Likewise.
4040         * include/bits/stl_vector.h (vector): Likewise.
4041         * include/debug/deque (__gnu_debug::deque): Likewise.
4042         * include/debug/forward_list (__gnu_debug::forward_list): Likewise.
4043         * include/debug/list (__gnu_debug::list): Likewise.
4044         * include/debug/safe_iterator.h (__gnu_debug::_Safe_iterator):
4045         Likewise.
4046         * include/debug/vector (__gnu_debug::vector): Likewise.
4047         * include/ext/pointer.h (__gnu_cxx::_Pointer_adapter): Define
4048         operator<=> for C++20.
4049         * testsuite/23_containers/deque/operators/cmp_c++20.cc: New test.
4050         * testsuite/23_containers/forward_list/cmp_c++20.cc: New test.
4051         * testsuite/23_containers/list/cmp_c++20.cc: New test.
4052         * testsuite/23_containers/vector/bool/cmp_c++20.cc: New test.
4053         * testsuite/23_containers/vector/cmp_c++20.cc: New test.
4054
4055         * include/bits/basic_string.h (basic_string): Define operator<=> and
4056         remove redundant comparison operators for C++20.
4057         * include/bits/char_traits.h (__gnu_cxx::char_traits, char_traits):
4058         Add comparison_category members.
4059         (__detail::__char_traits_cmp_cat): New helper to get comparison
4060         category from char traits class.
4061         * include/bits/regex.h (regex_traits::_RegexMask::operator!=): Do not
4062         define for C++20.
4063         (sub_match): Define operator<=> and remove redundant comparison
4064         operators for C++20.
4065         (match_results): Remove redundant operator!= for C++20.
4066         * include/std/string_view (basic_string_view): Define operator<=> and
4067         remove redundant comparison operators for C++20.
4068         * testsuite/21_strings/basic_string/operators/char/cmp_c++20.cc: New
4069         test.
4070         * testsuite/21_strings/basic_string/operators/wchar_t/cmp_c++20.cc:
4071         New test.
4072         * testsuite/21_strings/basic_string_view/operations/copy/char/
4073         constexpr.cc: Initialize variable.
4074         * testsuite/21_strings/basic_string_view/operations/copy/wchar_t/
4075         constexpr.cc: Likewise.
4076         * testsuite/21_strings/basic_string_view/operators/char/2.cc: Add
4077         dg-do directive and remove comments showing incorrect signatures.
4078         * testsuite/21_strings/basic_string_view/operators/wchar_t/2.cc:
4079         Likewise.
4080         * testsuite/21_strings/basic_string_view/operators/char/cmp_c++20.cc:
4081         New test.
4082         * testsuite/21_strings/basic_string_view/operators/wchar_t/cmp_c++20.cc:
4083         New test.
4084         * testsuite/28_regex/sub_match/compare_c++20.cc: New test.
4085
4086 2020-04-16  Jonathan Wakely  <jwakely@redhat.com>
4087
4088         * testsuite/20_util/unsynchronized_pool_resource/allocate.cc: Remove
4089         name of unused parameter.
4090
4091 2020-04-15  Jonathan Wakely  <jwakely@redhat.com>
4092
4093         * include/bits/fs_dir.h (file_status): Define operator== for C++20.
4094         (directory_entry): Define operator<=> and remove redundant comparison
4095         operators for C++20.
4096         * include/bits/fs_fwd.h (space_info): Define operator== for C++20.
4097         * include/bits/fs_path.h (path): Define operator<=> and remove
4098         redundant comparison operators for C++20.
4099         * testsuite/27_io/filesystem/path/compare/compare.cc: Fix comment.
4100         * testsuite/27_io/filesystem/path/compare/lwg2936.cc: Likewise.
4101         * testsuite/27_io/filesystem/path/compare/path.cc: Likewise.
4102         * testsuite/27_io/filesystem/path/compare/strings.cc: Likewise.
4103
4104         * include/bits/allocator.h (operator!=): Do not define for C++20.
4105         * include/bits/locale_classes.h (operator!=): Likewise.
4106         * include/bits/std_function.h (operator==(nullptr_t, const function&))
4107         (operator!=(const function&, nullptr_t))
4108         (operator!=(nullptr_t, const function&)): Likewise.
4109         * include/ext/bitmap_allocator.h (operator!=): Likewise.
4110         * include/ext/debug_allocator.h (operator!=): Likewise.
4111         * include/ext/extptr_allocator.h (operator!=): Likewise.
4112         * include/ext/malloc_allocator.h (operator!=): Likewise.
4113         * include/ext/mt_allocator.h (operator!=): Likewise.
4114         * include/ext/new_allocator.h (operator!=): Likewise.
4115         * include/ext/pool_allocator.h (operator!=): Likewise.
4116         * include/ext/throw_allocator.h (operator!=): Likewise.
4117         * include/std/bitset (bitset::operator!=): Likewise.
4118         * include/std/memory_resource (operator!=): Likewise.
4119         * include/std/scoped_allocator (operator!=): Likewise.
4120
4121         * include/std/typeindex (operator<=>): Define for C++20.
4122         * testsuite/20_util/typeindex/comparison_operators_c++20.cc: New test.
4123
4124 2020-04-14  Jonathan Wakely  <jwakely@redhat.com>
4125
4126         * libsupc++/compare (compare_three_way): Fix constraint so that
4127         BUILTIN-PTR-THREE-WAY does not require three_way_comparable_with.
4128         * testsuite/18_support/comparisons/object/builtin-ptr-three-way.cc:
4129         New test.
4130
4131         PR libstdc++/94562
4132         * include/bits/shared_ptr.h (operator<=>): Define for C++20.
4133         * include/bits/shared_ptr_base.h (operator<=>): Likewise.
4134         * include/bits/unique_ptr.h (operator<=>): Add inline specifier.
4135         * testsuite/20_util/shared_ptr/comparison/cmp_c++20.cc: New test.
4136         * testsuite/20_util/shared_ptr/comparison/less.cc: Do not expect
4137         std::less<A*> to be used when comparing std::shared_ptr<A> objects in
4138         C++20.
4139
4140         PR libstdc++/94565
4141         * libsupc++/compare (__unspec): Add noexcept-specifier to constructor.
4142         * testsuite/18_support/comparisons/categories/94565.cc: New test.
4143
4144 2020-04-13  Iain Sandoe  <iain@sandoe.co.uk>
4145
4146         * include/std/coroutine: Update coroutines builtin define,
4147         per n4861.
4148
4149 2020-04-09  Jonathan Wakely  <jwakely@redhat.com>
4150
4151         * libsupc++/compare (compare_three_way): Fix noexcept-specifier.
4152         (strong_order, weak_order, partial_order): Replace uses of <=> with
4153         compare_three_way function object (LWG 3324).
4154         * testsuite/18_support/comparisons/algorithms/partial_order.cc: Add
4155         equality operator so that X satisfies three_way_comparable.
4156         * testsuite/18_support/comparisons/algorithms/strong_order.cc:
4157         Likewise.
4158         * testsuite/18_support/comparisons/algorithms/weak_order.cc: Likewise.
4159
4160         * include/bits/unique_ptr.h (operator<=>): Define for C++20.
4161         * testsuite/20_util/default_delete/48631_neg.cc: Adjust dg-error line.
4162         * testsuite/20_util/default_delete/void_neg.cc: Likewise.
4163         * testsuite/20_util/unique_ptr/comparison/compare.cc: New test.
4164         * testsuite/20_util/unique_ptr/comparison/compare_c++20.cc: New test.
4165
4166 2020-04-08  Jonathan Wakely  <jwakely@redhat.com>
4167
4168         * include/bits/slice_array.h (operator==(const slice&, const slice&)):
4169         Define for C++20.
4170         * include/std/complex (operator==(const T&, const complex<T>&))
4171         (operator!=(const complex<T>&, const complex<T>&))
4172         (operator!=(const complex<T>&, const T&))
4173         (operator!=(const T&, const complex<T>&)): Do not declare for C++20.
4174         * testsuite/26_numerics/slice/compare.cc: New test.
4175
4176         * include/std/charconv (to_chars_result, from_chars_result): Add
4177         defaulted equality comparisons for C++20.
4178         * testsuite/20_util/from_chars/compare.cc: New test.
4179         * testsuite/20_util/to_chars/compare.cc: New test.
4180
4181 2020-04-07  Jonathan Wakely  <jwakely@redhat.com>
4182
4183         PR libstdc++/94520
4184         * include/std/charconv (__integer_to_chars_result_type)
4185         (__integer_from_chars_result_type): Use __or_ instead of __or_v_ to
4186         allow use in C++14.
4187         * testsuite/20_util/from_chars/1.cc: Run test as C++14 and replace
4188         use of std::string_view with std::string.
4189         * testsuite/20_util/from_chars/2.cc: Likewise.
4190         * testsuite/20_util/to_chars/1.cc: Likewise.
4191         * testsuite/20_util/to_chars/2.cc: Likewise.
4192
4193 2020-04-06  Jonathan Wakely  <jwakely@redhat.com>
4194
4195         PR libstdc++/94498
4196         * include/bits/char_traits.h (__gnu_cxx::char_traits::move): Make it
4197         usable in constant expressions for C++20.
4198         (__gnu_cxx::char_traits::copy, __gnu_cxx::char_traits::assign): Add
4199         _GLIBCXX20_CONSTEXPR.
4200         (std::char_traits<char>, std::char_traits<wchar_t>)
4201         (std::char_traits<char8_t>): Make move, copy and assign usable in
4202         constant expressions for C++20.
4203         (std::char_traits<char16_t>, std::char_traits<char32_t>): Make move
4204         and copy usable in constant expressions for C++20.
4205         * include/std/string_view (basic_string_view::copy): Add
4206         _GLIBCXX20_CONSTEXPR.
4207         * testsuite/21_strings/basic_string_view/operations/copy/char/
4208         constexpr.cc: New test.
4209         * testsuite/21_strings/basic_string_view/operations/copy/wchar_t/
4210         constexpr.cc: New test.
4211
4212 2020-04-05  Gerald Pfeifer  <gerald@pfeifer.com>
4213
4214         * doc/xml/manual/appendix_contributing.xml: Refer to Git
4215         documentation instead of Subversion.  Switch to https.
4216         * doc/html/manual/appendix_contributing.html: Regenerate.
4217
4218 2020-04-03  Jonathan Wakely  <jwakely@redhat.com>
4219
4220         PR libstdc++/93960
4221         * include/bits/ptr_traits.h (__to_address): Add special case for debug
4222         iterators, to avoid dereferenceable check.
4223         * testsuite/20_util/to_address/1_neg.cc: Adjust dg-error line number.
4224         * testsuite/20_util/to_address/debug.cc: New test.
4225
4226 2020-04-01  Andrea Corallo  <andrea.corallo@arm.com>
4227
4228         * testsuite/experimental/net/execution_context/use_service.cc:
4229         Require pthread and gthreads.
4230
4231 2020-04-01  Gerald Pfeifer  <gerald@pfeifer.com>
4232
4233         * doc/xml/manual/appendix_free.xml: Move "free books" list from
4234         fsf.org to gnu.org.
4235         * doc/html/manual/appendix_free.html: Regenerate.
4236
4237 2020-03-31  Ville Voutilainen  <ville.voutilainen@gmail.com>
4238
4239         Library-side tests for parenthesized aggregate init
4240
4241         PR c++/92878
4242         PR c++/92947
4243
4244         * testsuite/20_util/allocator_traits/members/92878_92947.cc: New.
4245         * testsuite/20_util/any/assign/92878_92947.cc: Likewise.
4246         * testsuite/20_util/any/cons/92878_92947.cc: Likewise.
4247         * testsuite/20_util/is_constructible/92878_92947.cc: Likewise.
4248         * testsuite/20_util/optional/assignment/92878_92947.cc: Likewise.
4249         * testsuite/20_util/optional/cons/92878_92947.cc: Likewise.
4250         * testsuite/20_util/pair/cons/92878_92947.cc: Likewise.
4251         * testsuite/20_util/shared_ptr/creation/92878_92947.cc: Likewise.
4252         * testsuite/20_util/specialized_algorithms/construct_at/92878_92947.cc:
4253         Likewise.
4254         * testsuite/20_util/unique_ptr/creation/92878_92947.cc: Likewise.
4255         * testsuite/20_util/uses_allocator/92878_92947.cc: Likewise.
4256         * testsuite/20_util/variant/92878_92947.cc: Likewise.
4257         * testsuite/23_containers/deque/modifiers/emplace/92878_92947.cc:
4258         Likewise.
4259         * testsuite/23_containers/forward_list/modifiers/92878_92947.cc:
4260         Likewise.
4261         * testsuite/23_containers/list/modifiers/emplace/92878_92947.cc:
4262         Likewise.
4263         * testsuite/23_containers/map/modifiers/emplace/92878_92947.cc:
4264         Likewise.
4265         * testsuite/23_containers/multimap/modifiers/emplace/92878_92947.cc:
4266         Likewise.
4267         * testsuite/23_containers/multiset/modifiers/emplace/92878_92947.cc:
4268         Likewise.
4269         * testsuite/23_containers/priority_queue/92878_92947.cc: Likewise.
4270         * testsuite/23_containers/queue/92878_92947.cc: Likewise.
4271         * testsuite/23_containers/set/modifiers/emplace/92878_92947.cc:
4272         Likewise.
4273         * testsuite/23_containers/stack/92878_92947.cc: Likewise.
4274         * testsuite/23_containers/unordered_map/modifiers/92878_92947.cc:
4275         Likewise.
4276         * testsuite/23_containers/unordered_multimap/modifiers/92878_92947.cc:
4277         Likewise.
4278         * testsuite/23_containers/unordered_multiset/modifiers/92878_92947.cc:
4279         Likewise.
4280         * testsuite/23_containers/unordered_set/modifiers/92878_92947.cc:
4281         Likewise.
4282         * testsuite/23_containers/vector/modifiers/emplace/92878_92947.cc:
4283         Likewise.
4284
4285 2020-03-28  Jonathan Wakely  <jwakely@redhat.com>
4286
4287         * testsuite/20_util/is_constructible/value-2.cc: Fix test to account
4288         for changes due to parenthesized aggregate-initialization in C++20.
4289         * testsuite/20_util/time_point/cons/81468.cc: Fix test to not clash
4290         with std::chrono::sys_time in C++20.
4291
4292         * include/bits/stl_iterator.h (reverse_iterator): Use requires-clause
4293         to constrain C++20 versions of comparison operators. Fix backwards
4294         logic of relational operators.
4295         (move_iterator): Use requires-clause to constrain comparison operators
4296         in C++20. Do not declare non-standard same-type overloads for C++20.
4297         * testsuite/24_iterators/move_iterator/rel_ops_c++20.cc: Check result
4298         of comparisons and check using greedy_ops type.
4299         * testsuite/24_iterators/reverse_iterator/rel_ops_c++20.cc: Likewise.
4300         * testsuite/24_iterators/move_iterator/greedy_ops.cc: Remove redundant
4301         main function from compile-only test.
4302         * testsuite/24_iterators/reverse_iterator/greedy_ops.cc: Likewise.
4303
4304 2020-03-27  Jonathan Wakely  <jwakely@redhat.com>
4305
4306         * include/bits/range_cmp.h (__cpp_lib_ranges): Define.
4307         * include/bits/stl_iterator.h: Check value of __cpp_concepts so that
4308         C++20 concepts are required.
4309         * include/bits/stl_iterator_base_types.h: Likewise.
4310         * include/std/concepts: Likewise.
4311         * include/std/version: Likewise.
4312         * testsuite/std/ranges/headers/ranges/synopsis.cc: Check feature test
4313         macro.
4314
4315         * include/bits/stl_iterator.h (reverse_iterator::iterator_concept)
4316         (reverse_iterator::iterator_category): Define for C++20.
4317         (reverse_iterator): Define comparison operators correctly for C++20.
4318         (__normal_iterator): Add constraints to comparison operators for C++20.
4319         (move_iterator::operator++(int)) [__cpp_lib_concepts]: Define new
4320         overload for input iterators.
4321         (move_iterator): Add constraints to comparison operators for C++20.
4322         Define operator<=> for C++20.
4323         * testsuite/24_iterators/move_iterator/input_iterator.cc: New test.
4324         * testsuite/24_iterators/move_iterator/move_only.cc: New test.
4325         * testsuite/24_iterators/move_iterator/rel_ops_c++20.cc: New test.
4326         * testsuite/24_iterators/reverse_iterator/rel_ops_c++20.cc: New test.
4327
4328         * include/bits/iterator_concepts.h (__detail::__decay_copy)
4329         (__detail::__member_begin, __detail::__adl_begin): Move here from
4330         <bits/range_access.h>.
4331         (__detail::__ranges_begin, __detail::__range_iter_t): Define.
4332         * bits/range_access.h (__cust_access::__decay_copy)
4333         (__cust_access::__member_begin, __cust_access::__adl_begin): Move to
4334         <bits/iterator_concepts.h>.
4335         (ranges::iterator_t): Use __detail::__range_iter_t.
4336         * include/bits/stl_iterator.h (back_insert_iterator): Simplify
4337         conditional compilation. Add _GLIBCXX20_CONSTEXPR to all members.
4338         (front_insert_iterator): Likewise.
4339         (insert_iterator): Implement changes from P0896R4 for C++20.
4340         * testsuite/24_iterators/back_insert_iterator/constexpr.cc: New test.
4341         * testsuite/24_iterators/front_insert_iterator/constexpr.cc: New test.
4342         * testsuite/24_iterators/headers/iterator/synopsis_c++17.cc: Adjust
4343         for inclusion in synopsis_c++20.cc which expects different signatures
4344         for some function templates.
4345         * testsuite/24_iterators/insert_iterator/constexpr.cc: New test.
4346
4347         * include/std/type_traits (__is_array_convertible): Move definition
4348         to immediately after is_convertible.
4349
4350 2020-03-26  Jonathan Wakely  <jwakely@redhat.com>
4351
4352         * include/std/chrono (chrono::days, chrono::weeks, chrono::years)
4353         (chrono::months, chrono::sys_days, chrono::local_t)
4354         (chrono::local_time, chrono::local_seconds, chrono::local_days):
4355         Define for C++20.
4356         (chrono::time_point): Add missing static assert.
4357         * testsuite/20_util/time_point/requirements/duration_neg.cc: New test.
4358         * testsuite/std/time/clock/file/overview.cc: New test.
4359         * testsuite/std/time/clock/file/members.cc: New test.
4360         * testsuite/std/time/syn_c++20.cc: New test.
4361
4362 2020-03-25  Mike Crowe  <mac@mcrowe.com>
4363
4364         * testsuite/30_threads/shared_timed_mutex/try_lock_until/1.cc: New
4365         test.
4366         * testsuite/30_threads/shared_timed_mutex/try_lock_until/2.cc: New
4367         test.
4368
4369 2020-03-25  Jonathan Wakely  <jwakely@redhat.com>
4370
4371         * include/bits/fs_fwd.h (filesystem::__file_clock): Move to ...
4372         * include/std/chrono (filesystem::__file_clock): Here.
4373         (filesystem::__file_clock::from_sys, filesystem::__file_clock::to_sys):
4374         Define public member functions for C++20.
4375         (is_clock, is_clock_v): Define traits for C++20.
4376         * include/std/condition_variable (condition_variable::wait_until): Add
4377         check for valid clock.
4378         * include/std/future (_State_baseV2::wait_until): Likewise.
4379         * include/std/mutex (__timed_mutex_impl::_M_try_lock_until): Likewise.
4380         * include/std/shared_mutex (shared_timed_mutex::try_lock_shared_until):
4381         Likewise.
4382         * include/std/thread (this_thread::sleep_until): Likewise.
4383         * testsuite/30_threads/condition_variable/members/2.cc: Qualify
4384         slow_clock with new namespace.
4385         * testsuite/30_threads/condition_variable/members/clock_neg.cc: New
4386         test.
4387         * testsuite/30_threads/condition_variable_any/members/clock_neg.cc:
4388         New test.
4389         * testsuite/30_threads/future/members/clock_neg.cc: New test.
4390         * testsuite/30_threads/recursive_timed_mutex/try_lock_until/3.cc:
4391         Qualify slow_clock with new namespace.
4392         * testsuite/30_threads/recursive_timed_mutex/try_lock_until/
4393         clock_neg.cc: New test.
4394         * testsuite/30_threads/shared_future/members/clock_neg.cc: New
4395         test.
4396         * testsuite/30_threads/shared_lock/locking/clock_neg.cc: New test.
4397         * testsuite/30_threads/shared_timed_mutex/try_lock_until/clock_neg.cc:
4398         New test.
4399         * testsuite/30_threads/timed_mutex/try_lock_until/3.cc: Qualify
4400         slow_clock with new namespace.
4401         * testsuite/30_threads/timed_mutex/try_lock_until/4.cc: Likewise.
4402         * testsuite/30_threads/timed_mutex/try_lock_until/clock_neg.cc: New
4403         test.
4404         * testsuite/30_threads/unique_lock/locking/clock_neg.cc: New test.
4405         * testsuite/std/time/traits/is_clock.cc: New test.
4406         * testsuite/util/slow_clock.h (slow_clock): Move to __gnu_test
4407         namespace.
4408
4409 2020-03-21  Jonathan Wakely  <jwakely@redhat.com>
4410
4411         PR libstdc++/93245
4412         * include/experimental/bits/fs_path.h (path::generic_string<C,T,A>()):
4413         * testsuite/experimental/filesystem/path/generic/generic_string.cc:
4414         Improve test coverage.
4415
4416         PR libstdc++/94242
4417         * include/bits/fs_path.h (path::_S_str_convert): Replace first
4418         parameter with basic_string_view so that strings with different
4419         allocators can be accepted.
4420         (path::generic_string<C,T,A>()): Use basic_string object that uses the
4421         right allocator type.
4422         * testsuite/27_io/filesystem/path/generic/94242.cc: New test.
4423         * testsuite/27_io/filesystem/path/generic/generic_string.cc: Improve
4424         test coverage.
4425
4426 2020-03-18  Jonathan Wakely  <jwakely@redhat.com>
4427
4428         PR libstdc++/94033
4429         * include/std/type_traits (__is_nt_default_constructible_atom): Remove.
4430         (__is_nt_default_constructible_impl): Remove.
4431         (__is_nothrow_default_constructible_impl): Remove.
4432         (__is_nt_constructible_impl): Add bool template parameter. Adjust
4433         partial specializations.
4434         (__is_nothrow_constructible_impl): Replace class template with alias
4435         template.
4436         (is_nothrow_default_constructible): Derive from alias template
4437         __is_nothrow_constructible_impl instead of
4438         __is_nothrow_default_constructible_impl.
4439         * testsuite/20_util/is_nothrow_constructible/94003.cc: New test.
4440
4441         * include/std/stop_token (stop_token::_Stop_state_ref): Define
4442         comparison operators explicitly if the compiler won't synthesize them.
4443
4444         * include/bits/stl_algobase.h (__lexicographical_compare_aux): Check
4445         __cpp_lib_concepts before using iter_reference_t.
4446         * include/bits/stream_iterator.h (istream_iterator): Check
4447         __cpp_lib_concepts before using default_sentinel_t.
4448         * include/bits/streambuf_iterator.h (istreambuf_iterator): Likewise.
4449
4450         PR libstdc++/94203
4451         * include/experimental/executor (executor::executor(Executor)): Call
4452         make_shared directly instead of _M_create. Create _Tgt1 object.
4453         (executor::executor(allocator_arg_t, const ProtoAlloc&, Executor)):
4454         Call allocate_shared directly instead of _M_create. Create _Tgt2
4455         object.
4456         (executor::target_type): Add cast needed for new _Tgt interface.
4457         (executor::target): Define when RTTI is disabled. Use _Tgt::_M_func.
4458         (executor::_Tgt): Define the same interface whether RTTI is enabled or
4459         not.
4460         (executor::_Tgt::target_type, executor::_Tgt::target): Do not use
4461         std::type_info in the interface.
4462         (executor::_Tgt::_M_func): Add data member.
4463         (executor::_TgtImpl): Replace with _Tgt1 and _Tgt2 class templates.
4464         (executor::_Tgt1::_S_func): Define function to access target without
4465         depending on RTTI.
4466         (executor::_M_create): Remove.
4467         (operator==, operator!=): Simplify comparisons for executor.
4468         * include/experimental/socket (is_error_code_enum<socket_errc>):
4469         Define specialization before use.
4470         * testsuite/experimental/net/executor/1.cc: New test.
4471
4472 2020-03-16  Jonathan Wakely  <jwakely@redhat.com>
4473
4474         PR libstdc++/94199
4475         * include/experimental/executor (service_already_exists): Add default
4476         constructor. Declare make_service to be a friend.
4477         * testsuite/experimental/net/execution_context/make_service.cc: New
4478         test.
4479
4480 2020-03-12  Jonathan Wakely  <jwakely@redhat.com>
4481
4482         * testsuite/tr1/8_c_compatibility/cstdlib/functions.cc: Do not pass
4483         a null pointer to functions with nonnull(1) attribute.
4484
4485 2020-03-11  Patrick Palka  <ppalka@redhat.com>
4486
4487         * include/std/ranges (split_view::_OuterIter::_OuterIter): Typo fix,
4488         'address' -> 'std::__addressof'.
4489         * testsuite/std/ranges/adaptors/split.cc: Test taking the split_view of
4490         a non-forward input_range.
4491         * testsuite/util/testsuite_iterators.h (output_iterator_wrapper): Make
4492         default constructor protected instead of deleted, like with
4493         input_iterator_wrapper.
4494         (test_range::iterator): Add comment explaining that this type is used
4495         only when the underlying wrapper is input_iterator_wrapper or
4496         output_iterator_wrapper.  Remove delegating defaulted constructor so
4497         that the inherited default constructor is used instead.
4498
4499         LWG 3286 ranges::size is not required to be valid after a call to
4500         ranges::begin on an input range
4501         * include/std/ranges (subrange::subrange): Split single-argument
4502         constructor into two, one constrained by _S_store_size and another by
4503         !_S_store_size.
4504         (take_view::begin): Call size() before calling ranges::begin(_M_base).
4505         * testsuite/std/ranges/adaptors/lwg3286.cc: New test.
4506         * testsuite/std/ranges/subrange/lwg3286.cc: New test.
4507
4508 2020-03-10  Jonathan Wakely  <jwakely@redhat.com>
4509
4510         * include/std/ranges (split_view::_OuterIter::__at_end): Use __current
4511         instead of _M_current.
4512         (split_view::_OuterIter::operator++): Likewise.
4513
4514         * include/std/ranges (transform_view::_Iterator::__iter_move): Remove.
4515         (transform_view::_Iterator::operator*): Add noexcept-specifier.
4516         (transform_view::_Iterator::iter_move): Inline __iter_move body here.
4517         (split_view::_OuterIter::__current): Add noexcept.
4518         (split_view::_InnerIter::__iter_swap): Remove.
4519         (split_view::_InnerIter::__iter_move): Remove.
4520         (split_view::_InnerIter::_M_i_current): New accessors.
4521         (split_view::_InnerIter::__at_end): Use _M_i_current().
4522         (split_view::_InnerIter::operator*): Likewise.
4523         (split_view::_InnerIter::operator++): Likewise.
4524         (iter_move(const _InnerIter&)): Likewise.
4525         (iter_swap(const _InnerIter&, const _InnerIter&)): Likewise.
4526         * testsuite/std/ranges/adaptors/split.cc: Check noexcept-specifier
4527         for iter_move and iter_swap on split_view's inner iterator.
4528
4529         PR c++/94117
4530         * include/std/ranges (ranges::transform_view::_Iterator::iter_move):
4531         Change expression in noexcept-specifier to match function body.
4532
4533         * testsuite/23_containers/unordered_set/allocator/ext_ptr.cc: Add
4534         comment explaining multiple dg-do directives.
4535         * testsuite/24_iterators/ostream_iterator/1.cc: Fix do-do directive
4536         so test is run as well as compiled.
4537
4538 2020-03-09  Jonathan Wakely  <jwakely@redhat.com>
4539
4540         PR libstdc++/94063
4541         * src/c++17/fs_path.cc (path::operator+=(const path&)): Add kluge to
4542         handle concatenations that change the type of the first component.
4543         (path::operator+=(basic_string_view<value_type>)): Likewise.
4544         * testsuite/27_io/filesystem/path/concat/94063.cc: New test.
4545
4546 2020-03-06  Patrick Palka  <ppalka@redhat.com>
4547
4548         * include/std/ranges (join_view::_Sentinel<_Const>): Befriend
4549         join_view::_Sentinel<!_Const>.
4550         * testsuite/std/ranges/adaptors/join.cc: Augment test.
4551
4552         PR libstdc++/93978
4553         * include/bits/range_access.h (__cust_access::_Empty::operator()):
4554         Declare return type to be bool instead of auto.
4555         * testsuite/std/ranges/adaptors/93978.cc: New test.
4556
4557 2020-03-06  Jonathan Wakely  <jwakely@redhat.com>
4558
4559         PR libstdc++/94069
4560         * include/std/shared_mutex [!PTHREAD_RWLOCK_INITIALIZER]
4561         (__shared_mutex_pthread::__shared_mutex_pthread()): Remove incorrect
4562         second argument to __glibcxx_rwlock_init.
4563         * testsuite/30_threads/shared_timed_mutex/94069.cc: New test.
4564
4565         PR libstdc++/93244
4566         * testsuite/27_io/filesystem/path/generic/generic_string.cc: Adjust
4567         test to not fail due to PR 94063.
4568         * testsuite/27_io/filesystem/path/generic/utf.cc: Likewise.
4569         * testsuite/27_io/filesystem/path/generic/wchar_t.cc: Likewise.
4570
4571 2020-03-06  Andreas Krebbel  <krebbel@linux.ibm.com>
4572
4573         * src/c++11/system_error.cc: Omit the ENOTSUP case statement if it
4574         would match ENOSYS.
4575
4576 2020-03-05  Jonathan Wakely  <jwakely@redhat.com>
4577
4578         * testsuite/27_io/filesystem/operations/all.cc: Mark unused variable.
4579         * testsuite/27_io/filesystem/operations/copy.cc: Fix typo.
4580         * testsuite/experimental/filesystem/operations/copy.cc: Likewise.
4581         * testsuite/27_io/filesystem/operations/file_size.cc: Use correct type
4582         for return value, and in comparison.
4583         * testsuite/experimental/filesystem/operations/file_size.cc: Likewise.
4584
4585         PR libstdc++/94051
4586         * include/std/string_view: Include <bits/ostream_insert.h>.
4587         * testsuite/21_strings/basic_string_view/inserters/94051.cc: New test.
4588
4589 2020-03-04  Jonathan Wakely  <jwakely@redhat.com>
4590
4591         * include/bits/cpp_type_traits.h (__memcpyable): Fix comment.
4592
4593 2020-03-04  Patrick Palka  <ppalka@redhat.com>
4594
4595         PR libstdc++/94017
4596         * include/bits/ranges_algobase.h (__fill_n_fn::operator()): Refine
4597         condition for when to use memset, making sure to additionally check that
4598         the output pointer's value type is a non-volatile byte type.  Instead of
4599         requiring that the fill type is a byte type, just require that it's an
4600         integral type.
4601         * testsuite/20_util/specialized_algorithms/uninitialized_fill/94017.cc:
4602         New test.
4603         * testsuite/20_util/specialized_algorithms/uninitialized_fill_n/94017.cc:
4604         New test.
4605         * testsuite/25_algorithms/fill/94013.cc: Uncomment part of test that was
4606         blocked by PR 94017.
4607         * testsuite/25_algorithms/fill/94017.cc: New test.
4608         * testsuite/25_algorithms/fill_n/94017.cc: New test.
4609
4610         LWG 3355 The memory algorithms should support move-only input iterators
4611         introduced by P1207
4612         * include/bits/ranges_uninitialized.h
4613         (__uninitialized_copy_fn::operator()): Use std::move to avoid attempting
4614         to copy __ifirst, which could be a move-only input iterator.  Use
4615         operator- instead of ranges::distance to compute distance from a sized
4616         sentinel.
4617         (__uninitialized_copy_n_fn::operator()): Likewise.
4618         (__uninitialized_move_fn::operator()): Likewise.
4619         (__uninitialized_move_n_fn::operator()): Likewise.
4620         (__uninitialized_destroy_fn::operator()): Use std::move to avoid
4621         attempting to copy __first.
4622         (__uninitialized_destroy_n_fn::operator()): Likewise.
4623         * testsuite/20_util/specialized_algorithms/destroy/constrained.cc:
4624         Augment test.
4625         * .../specialized_algorithms/uninitialized_copy/constrained.cc:
4626         Likewise.
4627         * .../specialized_algorithms/uninitialized_move/constrained.cc:
4628         Likewise.
4629
4630         * testsuite/util/testsuite_iterators.h (test_range::get_iterator): Make
4631         protected instead of private.
4632         (test_sized_range_sized_sent): New.
4633
4634         * testsuite/util/testsuite_iterators.h (input_iterator_wrapper_nocopy):
4635         New testsuite iterator.
4636         * testsuite/24_iterators/counted_iterator/lwg3389.cc: use it.
4637         * testsuite/24_iterators/move_iterator/lwg3390.cc: Likewise.
4638
4639         * include/bits/ranges_uninitialized.h
4640         (uninitialized_copy_fn::operator()): Pass a reference type as the first
4641         argument to is_nothrow_assignable_v.
4642         (uninitialized_copy_fn::operator()): Likewise.
4643         (uninitialized_move_fn::operator()): Likewise.  Return an in_out_result
4644         with the input iterator stripped of its move_iterator.
4645         (uninitialized_move_n_fn::operator()): Likewise.
4646         (uninitialized_fill_fn::operator()): Pass a reference type as the first
4647         argument to is_nothrow_assignable_v.
4648         (uninitialized_fill_n_fn::operator()): Likewise.
4649
4650 2020-03-03  Jonathan Wakely  <jwakely@redhat.com>
4651
4652         PR libstdc++/94013
4653         * include/bits/cpp_type_traits.h (__memcpyable, __memcmpable): New
4654         traits to control when to use memmove and memcmp optimizations.
4655         (__is_nonvolatile_trivially_copyable): New helper trait.
4656         * include/bits/ranges_algo.h (__lexicographical_compare_fn): Do not
4657         use memcmp optimization with volatile data.
4658         * include/bits/ranges_algobase.h (__equal_fn): Use __memcmpable.
4659         (__copy_or_move, __copy_or_move_backward): Use __memcpyable.
4660         * include/bits/stl_algobase.h (__copy_move_a2): Use __memcpyable.
4661         (__copy_move_backward_a2): Likewise.
4662         (__equal_aux1): Use __memcmpable.
4663         (__lexicographical_compare_aux): Do not use memcmp optimization with
4664         volatile data.
4665         * testsuite/25_algorithms/copy/94013.cc: New test.
4666         * testsuite/25_algorithms/copy_backward/94013.cc: New test.
4667         * testsuite/25_algorithms/equal/94013.cc: New test.
4668         * testsuite/25_algorithms/fill/94013.cc: New test.
4669         * testsuite/25_algorithms/lexicographical_compare/94013.cc: New test.
4670         * testsuite/25_algorithms/move/94013.cc: New test.
4671         * testsuite/25_algorithms/move_backward/94013.cc: New test.
4672
4673         * include/bits/stl_algobase.h (lexicographical_compare_three_way):
4674         Avoid redundant iterator comparisons (LWG 3410).
4675
4676 2020-03-02  Jonathan Wakely  <jwakely@redhat.com>
4677
4678         PR libstdc++/93972
4679         * include/bits/stl_algobase.h (__memcmp): Allow pointer types to
4680         differ.
4681         * testsuite/25_algorithms/lexicographical_compare/uchar.cc: New test.
4682
4683         * include/std/ranges (__detail::__maybe_empty_t): Rename to
4684         __maybe_present_t.
4685         (__adaptor::_RangeAdaptor, join_view, split_view): Use new name.
4686
4687         * include/bits/ranges_algo.h (shift_right): Add 'typename' to
4688         dependent type.
4689
4690 2020-03-01  H.J. Lu  <hongjiu.lu@intel.com>
4691
4692         * config/abi/post/x86_64-linux-gnu/x32/baseline_symbols.txt: Updated.
4693
4694 2020-02-29  John David Anglin  <danglin@gcc.gnu.org>
4695
4696         * testsuite/17_intro/headers/c++1998/charset.cc: Skip on *-*-hpux*.
4697         * testsuite/17_intro/headers/c++2011/charset.cc: Likewise.
4698         * testsuite/17_intro/headers/c++2014/charset.cc: Likewise.
4699         * testsuite/17_intro/headers/c++2017/charset.cc: Likewise.
4700         * testsuite/17_intro/headers/c++2020/charset.cc: Likewise.
4701
4702         * testsuite/30_threads/condition_variable_any/stop_token/wait_on.cc:
4703         Add libatomic option.
4704         * testsuite/30_threads/jthread/jthread.cc: Likewise.
4705
4706 2020-02-29  François Dumont  <fdumont@gcc.gnu.org>
4707
4708         * include/bits/stl_algo.h
4709         (__find_if, __count_if, __is_permutation, std::is_permutation): Move...
4710         * include/bits/stl_algobase.h: ...here.
4711         * include/bits/hashtable_policy.h: Remove <bits/stl_algo.h> include.
4712
4713 2020-02-29  John David Anglin  <danglin@gcc.gnu.org>
4714
4715         * testsuite/30_threads/stop_token/stop_callback.cc: Add libatomic
4716         option.
4717         * testsuite/30_threads/stop_token/stop_callback/deadlock-mt.cc:
4718         Likewise.
4719         * testsuite/30_threads/stop_token/stop_callback/deadlock.cc: Likewise.
4720         * testsuite/30_threads/stop_token/stop_callback/destroy.cc: Likewise.
4721         * testsuite/30_threads/stop_token/stop_callback/invoke.cc: Likewise.
4722         * testsuite/30_threads/stop_token/stop_source.cc: Likewise.
4723         * testsuite/30_threads/stop_token/stop_source/assign.cc: Likewise.
4724         * testsuite/30_threads/stop_token/stop_token.cc: Likewise.
4725         * testsuite/30_threads/stop_token/stop_token/stop_possible.cc:
4726         Likewise.
4727
4728         PR libstdc++/92906
4729         * config/abi/post/hppa-linux-gnu/baseline_symbols.txt: Update.
4730
4731 2020-02-28  Patrick Palka  <ppalka@redhat.com>
4732
4733         PR libstdc++/93972
4734         * include/bits/ranges_algo.h (__lexicographical_compare_fn::operator()):
4735         Fix condition for when to use memcmp, making it consistent with the
4736         corresponding condition used in std::lexicographical_compare.
4737         * testsuite/25_algorithms/lexicographical_compare/93972.cc: New test.
4738
4739         * testsuite/26_numerics/headers/numeric/synopsis.cc: Add signatures for
4740         functions introduced in C++11, C++17 and C++2a.  Add 'constexpr' to
4741         existing signatures for C++2a.
4742
4743 2020-02-28  Jonathan Wakely  <jwakely@redhat.com>
4744
4745         * testsuite/24_iterators/range_operations/advance_debug_neg.cc: Run
4746         test instead of just compiling it.
4747
4748 2020-02-28  Patrick Palka  <ppalka@redhat.com>
4749
4750         * include/std/ranges (reverse_view::_S_needs_cached_begin): Set to false
4751         whenever the underlying range models common_range.
4752
4753         * include/std/ranges (__detail::_CachedPosition): New struct.
4754         (views::filter_view::_S_needs_cached_begin): New member variable.
4755         (views::filter_view::_M_cached_begin): New member variable.
4756         (views::filter_view::begin): Use _M_cached_begin to cache its
4757         result.
4758         (views::drop_view::_S_needs_cached_begin): New static member variable.
4759         (views::drop_view::_M_cached_begin): New member variable.
4760         (views::drop_view::begin): Use _M_cached_begin to cache its result
4761         when _S_needs_cached_begin.
4762         (views::drop_while_view::_M_cached_begin): New member variable.
4763         (views::drop_while_view::begin): Use _M_cached_begin to cache its
4764         result.
4765         (views::reverse_view::_S_needs_cached_begin): New static member
4766         variable.
4767         (views::reverse_view::_M_cached_begin): New member variable.
4768         (views::reverse_view::begin): Use _M_cached_begin to cache its result
4769         when _S_needs_cached_begin.
4770         * testsuite/std/ranges/adaptors/drop.cc: Augment test to check that
4771         drop_view::begin caches its result.
4772         * testsuite/std/ranges/adaptors/drop_while.cc: Augment test to check
4773         that drop_while_view::begin caches its result.
4774         * testsuite/std/ranges/adaptors/filter.cc: Augment test to check that
4775         filter_view::begin caches its result.
4776         * testsuite/std/ranges/adaptors/reverse.cc: Augment test to check that
4777         reverse_view::begin caches its result.
4778
4779 2020-02-28  Jonathan Wakely  <jwakely@redhat.com>
4780
4781         * testsuite/27_io/filesystem/operations/last_write_time.cc: Fixes for
4782         filesystems that silently truncate timestamps.
4783         * testsuite/experimental/filesystem/operations/last_write_time.cc:
4784         Likewise.
4785
4786         * testsuite/21_strings/basic_string/cons/char/1.cc: Disable
4787         -Wstringop-overflow warnings.
4788
4789 2020-02-27  Jonathan Wakely  <jwakely@redhat.com>
4790
4791         * testsuite/lib/libstdc++.exp (v3_target_compile): Add
4792         -fdiagnostics-urls=never to options.
4793
4794 2020-02-27  Patrick Palka  <ppalka@redhat.com>
4795
4796         * include/std/ranges (transform_view::_Iterator<_Const>): Befriend
4797         _Iterator<!_Const>.
4798         (transform_view::_Sentinel<_Const>): Befriend _Sentinel<!_Const>.
4799         (take_view::_Sentinel<_Const>): Likewise.
4800         (take_while_view::_Sentinel<_Const>): Likewise.
4801         (split_view::_OuterIter<_Const>): Befriend _OuterIter<!_Const>.
4802         * testsuite/std/ranges/adaptors/split.cc: Augment test.
4803         * testsuite/std/ranges/adaptors/take.cc: Augment test.
4804         * testsuite/std/ranges/adaptors/take_while.cc: Augment test.
4805         * testsuite/std/ranges/adaptors/transform.cc: Augment test.
4806
4807         * testsuite/25_algorithms/copy/constrained.cc: Don't assume that the
4808         base() of a vector<>::iterator is a pointer.
4809         * testsuite/25_algorithms/copy_backward/constrained.cc: Likewise.
4810         * testsuite/25_algorithms/move/constrained.cc: Likewise.
4811         * testsuite/25_algorithms/move_backward/constrained.cc: Likewise.
4812         * testsuite/25_algorithms/inplace_merge/constrained.cc: Use foo.data()
4813         instead of &foo[0].
4814         * testsuite/25_algorithms/partial_sort/constrained.cc: Likewise.
4815         * testsuite/25_algorithms/partial_sort_copy/constrained.cc: Likewise.
4816         * testsuite/25_algorithms/shuffle/constrained.cc: Likewise.
4817         * testsuite/25_algorithms/sort/constrained.cc: Likewise.
4818         * testsuite/25_algorithms/stable_sort/constrained.cc: Likewise.
4819
4820 2020-02-27  Jonathan Wakely  <jwakely@redhat.com>
4821
4822         * include/debug/array (operator<=>): Define for C++20.
4823         * testsuite/23_containers/array/tuple_interface/get_debug_neg.cc:
4824         Adjust dg-error line numbers.
4825         * testsuite/23_containers/array/tuple_interface/
4826         tuple_element_debug_neg.cc: Likewise.
4827
4828         * testsuite/23_containers/span/back_assert_neg.cc: Add #undef before
4829         defining _GLIBCXX_ASSERTIONS.
4830         * testsuite/23_containers/span/first_2_assert_neg.cc: Likewise.
4831         * testsuite/23_containers/span/first_assert_neg.cc: Likewise.
4832         * testsuite/23_containers/span/front_assert_neg.cc: Likewise.
4833         * testsuite/23_containers/span/index_op_assert_neg.cc: Likewise.
4834         * testsuite/23_containers/span/last_2_assert_neg.cc: Likewise.
4835         * testsuite/23_containers/span/last_assert_neg.cc: Likewise.
4836         * testsuite/23_containers/span/subspan_2_assert_neg.cc: Likewise.
4837         * testsuite/23_containers/span/subspan_3_assert_neg.cc: Likewise.
4838         * testsuite/23_containers/span/subspan_4_assert_neg.cc: Likewise.
4839         * testsuite/23_containers/span/subspan_5_assert_neg.cc: Likewise.
4840         * testsuite/23_containers/span/subspan_6_assert_neg.cc: Likewise.
4841         * testsuite/23_containers/span/subspan_assert_neg.cc: Likewise.
4842
4843         * include/debug/string (__gnu_debug::basic_string::insert): Fix for
4844         C++98 where the member function of the base class returns void.
4845
4846         * testsuite/util/testsuite_iterators.h (forward_iterator_wrapper): Add
4847         equality comparisons that support value-initialized iterators.
4848
4849         * include/bits/boost_concept_check.h (__function_requires): Add
4850         _GLIBCXX14_CONSTEXPR.
4851         * testsuite/25_algorithms/min/concept_checks.cc: New test.
4852
4853 2020-02-26  Patrick Palka  <ppalka@redhat.com>
4854
4855         PR libstdc++/93936
4856         * include/std/ranges (split_view::_InnerIter::operator==): Compare
4857         the operands' _M_i rather than their _M_i.current().
4858         * testsuite/std/ranges/adaptors/split.cc: Augment test.
4859
4860         P1645R1 constexpr for <numeric> algorithms
4861         * include/bits/stl_numeric.h (iota, accumulate, inner_product,
4862         partial_sum, adjacent_difference): Make conditionally constexpr for
4863         C++20.
4864         * include/std/numeric (__cpp_lib_constexpr_numeric): Define this feature
4865         test macro.
4866         (reduce, transform_reduce, exclusive_scan, inclusive_scan,
4867         transform_exclusive_scan, transform_inclusive_scan): Make conditionally
4868         constexpr for C++20.
4869         * include/std/version (__cpp_lib_constexpr_numeric): Define.
4870         * testsuite/26_numerics/accumulate/constexpr.cc: New test.
4871         * testsuite/26_numerics/adjacent_difference/constexpr.cc: Likewise.
4872         * testsuite/26_numerics/exclusive_scan/constexpr.cc: Likewise.
4873         * testsuite/26_numerics/inclusive_scan/constexpr.cc: Likewise.
4874         * testsuite/26_numerics/inner_product/constexpr.cc: Likewise.
4875         * testsuite/26_numerics/iota/constexpr.cc: Likewise.
4876         * testsuite/26_numerics/partial_sum/constexpr.cc: Likewise.
4877         * testsuite/26_numerics/reduce/constexpr.cc: Likewise.
4878         * testsuite/26_numerics/transform_exclusive_scan/constexpr.cc: Likewise.
4879         * testsuite/26_numerics/transform_inclusive_scan/constexpr.cc: Likewise.
4880         * testsuite/26_numerics/transform_reduce/constexpr.cc: Likewise.
4881
4882 2020-02-26  Jonathan Wakely  <jwakely@redhat.com>
4883
4884         * include/bits/ranges_algo.h (__lexicographical_compare_fn): Declare
4885         variables in smaller scope and avoid calling ranges::distance when we
4886         know they are pointers. Remove statically-unreachable use of
4887         __builtin_unreachable().
4888         * include/bits/stl_algobase.h (__lexicographical_compare::__lc):
4889         Define inline.
4890
4891         * include/std/ranges (__detail::__maybe_empty_t): Define new helper
4892         alias.
4893         (__detail::__maybe_const_t): Likewise.
4894         (__adaptor::_RangeAdaptor): Use __maybe_empty_t.
4895         (transform_view, take_view, take_while_view, elements_view): Use
4896         __maybe_const_t.
4897         (join_view, split_view): Use both.
4898
4899 2020-02-25  Patrick Palka  <ppalka@redhat.com>
4900
4901         LWG 3397 basic_istream_view::iterator should not provide
4902         iterator_category
4903         * include/std/ranges (basic_istream_view:_Iterator::iterator_category):
4904         Rename to ...
4905         (basic_istream_view:_Iterator::iterator_concept): ... this.
4906         * testsuite/std/ranges/istream_view.cc: Augment test.
4907
4908         LWG 3325 Constrain return type of transformation function for
4909         transform_view
4910         * include/std/ranges (transform_view): Constrain the return type of the
4911         transformation function as per LWG 3325.
4912         * testsuite/std/ranges/adaptors/lwg3325_neg.cc: New test.
4913
4914         LWG 3313 join_view::_Iterator::operator-- is incorrectly constrained
4915         * include/std/ranges (join_view::_Iterator::operator--): Require that
4916         range_reference_t<_Base> models common_range.
4917         * testsuite/std/ranges/adaptors/lwg3313_neg.cc: New test.
4918
4919         LWG 3301 transform_view::_Iterator has incorrect iterator_category
4920         * include/std/ranges (transform_view::_Iterator::_S_iter_cat): Adjust
4921         determination of iterator_category as per LWG 3301.
4922         * testsuite/std/ranges/adaptors/transform.cc: Augment test.
4923
4924         LWG 3292 iota_view is under-constrained
4925         * include/std/ranges (iota_view): Require that _Winc models semiregular
4926           as per LWG 3292.
4927         * testsuite/std/ranges/iota/lwg3292_neg.cc: New test.
4928
4929 2020-02-25  Jonathan Wakely  <jwakely@redhat.com>
4930
4931         * include/bits/ranges_algobase.h (__copy_or_move): Do not use memmove
4932         during constant evaluation. Call __builtin_memmove directly instead of
4933         __memmove.
4934         (__copy_or_move_backward): Likewise.
4935         * include/bits/stl_algobase.h (__memmove): Remove.
4936         (__copy_move<M, true, random_access_iterator_tag>::__copy_m)
4937         (__copy_move_backward<M, true, random_access_iterator_tag>::__copy_m):
4938         Use __builtin_memmove directly instead of __memmove.
4939         (__copy_move_a2): Do not use memmove during constant evaluation.
4940         (__copy_move_backward_a2): Use _IsMove constant to select correct
4941         __copy_move_backward specialization.
4942         * testsuite/25_algorithms/copy_backward/constexpr.cc: Check for copies
4943         begin turned into moves during constant evaluation.
4944
4945         * testsuite/25_algorithms/move_backward/93872.cc: Add test left out of
4946         previous commit.
4947
4948         PR libstdc++/93872
4949         * include/bits/stl_algobase.h (__memmove): Cast away const before
4950         doing move assignment.
4951         * testsuite/25_algorithms/move/93872.cc: New test.
4952         * testsuite/25_algorithms/move_backward/93872.cc: New test.
4953
4954 2020-02-24  Patrick Palka  <ppalka@redhat.com>
4955
4956         PR libstdc++/93884
4957         * include/bits/ranges_algobase.h (__copy_or_move,
4958         __copy_or_move_backward): Don't inspect the iter_value_t of the output
4959         iterator, instead inspect its iterator_traits directly.
4960         * include/bits/stl_iterator.h (back_insert_iterator::container):
4961         Conditionally initialize.
4962         (back_insert_iterator::difference_type): Conditionally define.
4963         (back_insert_iterator::back_insert_iterator): Conditionally define this
4964         default constructor.
4965         (front_insert_iterator::container): Conditionally initialize.
4966         (front_insert_iterator::difference_type): Conditionally define.
4967         (front_insert_iterator::front_insert_iterator): Conditionally define
4968         this default constructor.
4969         * 24_iterators/back_insert_iterator/pr93884.cc: New test.
4970         * 24_iterators/front_insert_iterator/pr93884.cc: New test.
4971
4972         P0769R2 Add shift to <algorithm>
4973         * include/bits/ranges_algo.h (shift_left, shift_right): New.
4974         * testsuite/25_algorithms/shift_left/1.cc: New test.
4975         * testsuite/25_algorithms/shift_right/1.cc: New test.
4976
4977 2020-02-24  Jonathan Wakely  <jwakely@redhat.com>
4978
4979         * include/bits/stream_iterator.h (istream_iterator(default_sentinel_t)):
4980         Make noexcept-specifier conditional.
4981         * testsuite/24_iterators/istream_iterator/cons/sentinel.cc: Check
4982         noexcept-specifier.
4983
4984         * include/bits/stream_iterator.h (istream_iterator(default_sentinel_t)):
4985         Add constructor.
4986         (operator==(istream_iterator, default_sentinel_t)): Add operator.
4987         (ostream_iterator::difference_type): Define to ptrdiff_t for C++20.
4988         * include/bits/streambuf_iterator.h
4989         (istreambuf_iterator(default_sentinel_t)): Add constructor.
4990         (operator==(istreambuf_iterator, default_sentinel_t)): Add operator.
4991         * testsuite/24_iterators/istream_iterator/cons/sentinel.cc:
4992         New test.
4993         * testsuite/24_iterators/istream_iterator/sentinel.cc: New test.
4994         * testsuite/24_iterators/istreambuf_iterator/cons/sentinel.cc:
4995         New test.
4996         * testsuite/24_iterators/istreambuf_iterator/sentinel.cc: New test.
4997
4998         * include/std/ranges (__deep_const_range, __enable_view_impl): Remove.
4999         (ranges::enable_view): Simplify (LWG 3326).
5000         * include/bits/range_access.h (ranges::enable_view): Declare.
5001         * include/bits/regex.h (__enable_view_impl): Remove partial
5002         specialization.
5003         * include/bits/stl_multiset.h (__enable_view_impl): Likewise.
5004         * include/bits/stl_set.h (__enable_view_impl): Likewise.
5005         * include/bits/unordered_set.h (__enable_view_impl): Likewise.
5006         * include/debug/multiset.h (__enable_view_impl): Likewise.
5007         * include/debug/set.h (__enable_view_impl): Likewise.
5008         * include/debug/unordered_set (__enable_view_impl): Likewise.
5009         * include/experimental/string_view (ranges::enable_view): Define
5010         partial specialization.
5011         * include/std/span (ranges::enable_view): Likewise.
5012         * include/std/string_view (ranges::enable_view): Likewise.
5013         * testsuite/std/ranges/view.cc: Check satisfaction of updated concept.
5014
5015 2020-02-21  Jonathan Wakely  <jwakely@redhat.com>
5016
5017         * include/std/optional (operator<=>(optional<T>, optional<U>))
5018         (operator<=>(optional<T>, nullopt), operator<=>(optional<T>, U)):
5019         Define for C++20.
5020         * include/std/tuple (__tuple_cmp): New helper function for <=>.
5021         (operator<=>(tuple<T...>, tuple<U>...)): Define for C++20.
5022         * include/std/variant (operator<=>(variant<T...>, variant<T...>))
5023         (operator<=>(monostate, monostate)): Define for C++20.
5024         * testsuite/20_util/optional/relops/three_way.cc: New test.
5025         * testsuite/20_util/tuple/comparison_operators/three_way.cc: New test.
5026         * testsuite/20_util/variant/89851.cc: Move to ...
5027         * testsuite/20_util/variant/relops/89851.cc: ... here.
5028         * testsuite/20_util/variant/90008.cc: Move to ...
5029         * testsuite/20_util/variant/relops/90008.cc: ... here.
5030         * testsuite/20_util/variant/relops/three_way.cc: New test.
5031
5032 2020-02-20  Patrick Palka  <ppalka@redhat.com>
5033
5034         * include/std/ranges (views::__adaptor::__maybe_refwrap): New utility
5035         function.
5036         (views::__adaptor::_RangeAdaptor::operator()): Add comments.  Use
5037         __maybe_refwrap to capture lvalue references by reference, and then use
5038         unwrap_reference_t to forward the by-reference captures as references.
5039         * testsuite/std/ranges/adaptors/split.cc: Augment test.
5040         * testsuite/std/ranges/adaptors/split_neg.cc: New test.
5041
5042         * include/std/ranges (iota_view): Forward declare _Sentinel.
5043         (iota_view::_Iterator): Befriend _Sentinel.
5044         (iota_view::_Sentinel::_M_equal): New member function.
5045         (iota_view::_Sentinel::operator==): Use it.
5046         (views::_Iota::operator()): Forward __f using the correct type.
5047         * testsuite/std/ranges/access/ssize.cc (test06): Don't call views::iota
5048         with integers of different signedness, to appease iota_view's deduction
5049         guide.
5050         * testsuite/std/ranges/iota/iota_view.cc: Augment test.
5051
5052 2020-02-20  Jonathan Wakely  <jwakely@redhat.com>
5053
5054         * include/bits/range_access.h (ranges::begin): Reject array of
5055         incomplete type.
5056         (ranges::end, ranges::size): Require arrays to be bounded.
5057         (ranges::data): Require lvalue or borrowed_range.
5058         (ranges::iterator_t): Remove constraint.
5059         * testsuite/std/ranges/access/begin.cc: Do not check array of
5060         incomplete type.
5061         * testsuite/std/ranges/access/begin_neg.cc: New test.
5062         * testsuite/std/ranges/access/end_neg.cc: Adjust expected error.
5063         * testsuite/std/ranges/access/size_neg.cc: Adjust expected error.
5064         * testsuite/std/ranges/access/ssize.cc: Do not check array of
5065         incomplete type.
5066
5067         * include/std/system_error (error_category::operator<=>)
5068         (operator<=>(const error_code&, const error_code&))
5069         (operator<=>(const error_condition&, const error_condition&)): Define
5070         for C++20.
5071         * testsuite/19_diagnostics/error_category/operators/less.cc: New test.
5072         * testsuite/19_diagnostics/error_category/operators/three_way.cc: New
5073         test.
5074         * testsuite/19_diagnostics/error_code/operators/equal.cc: Remove
5075         incorrect comment.
5076         * testsuite/19_diagnostics/error_code/operators/less.cc: New test.
5077         * testsuite/19_diagnostics/error_code/operators/not_equal.cc: Remove
5078         incorrect comment.
5079         * testsuite/19_diagnostics/error_code/operators/three_way.cc: New test.
5080         * testsuite/19_diagnostics/error_condition/operators/equal.cc: Remove
5081         incorrect comment.
5082         * testsuite/19_diagnostics/error_condition/operators/less.cc: New test.
5083         * testsuite/19_diagnostics/error_condition/operators/not_equal.cc:
5084         Remove incorrect comment.
5085         * testsuite/19_diagnostics/error_condition/operators/three_way.cc: New
5086         test.
5087
5088         * libsupc++/typeinfo (type_info::operator!=): Remove for C++20.
5089
5090         * include/std/thread (thread::id::operator<=>): Define for C++20.
5091         * testsuite/30_threads/thread/id/70294.cc: Do not take addresses of
5092         functions in namespace std.
5093         * testsuite/30_threads/thread/id/operators_c++20.cc: New test.
5094
5095 2020-02-19  Patrick Palka  <ppalka@redhat.com>
5096
5097         * testsuite/std/ranges/adaptors/split.cc (test03): Don't include the
5098         null terminator of the underlying string as part of the test_range.
5099         (main): Call test03.
5100
5101 2020-02-19  Jonathan Wakely  <jwakely@redhat.com>
5102
5103         * include/bits/stl_iterator.h (common_iterator): Add copyable<I>
5104         requirement (LWG 3385).
5105         * testsuite/24_iterators/headers/iterator/synopsis_c++20.cc: Adjust
5106         expected declaration.
5107
5108         * include/std/ranges (take_while_view, drop_view, drop_while_view)
5109         (elements_view:_Iterator): Initialize data members (LWG 3364).
5110
5111         * libsupc++/compare (three_way_comparable): Remove always-false check
5112         that should have been removed with weak_equality (P1959R0).
5113         (three_way_comparable_with): Likewise. Reorder requirements (LWG 3360).
5114
5115         * include/std/concepts (__detail::__partially_ordered_with): Move here
5116         from <compare>.
5117         (totally_ordered, totally_ordered_with): Use __partially_ordered_with
5118         to simplify definition (LWG 3331).
5119         * libsupc++/compare (__detail::__partially_ordered_with): Move to
5120         <concepts>.
5121
5122         * include/std/concepts (totally_ordered_with): Remove redundant
5123         requirement (LWG 3329).
5124
5125         * include/std/ranges (__detail::__convertible_to_non_slicing): New
5126         helper concept.
5127         (__detail::__pair_like_convertible_to): Remove.
5128         (__detail::__pair_like_convertible_from): Add requirements for
5129         non-slicing conversions.
5130         (subrange): Constrain constructors with __convertible_to_non_slicing.
5131         Remove constructors from pair-like types. Add new deduction guide.
5132         * testsuite/std/ranges/subrange/lwg3282_neg.cc: New test.
5133
5134         * include/bits/iterator_concepts.h (iter_move): Add declaration to
5135         prevent unqualified lookup finding a suitable declaration (LWG 3247).
5136
5137         * include/std/memory_resource (polymorphic_allocator::allocate)
5138         (polymorphic_allocator::allocate_object): Change type of exception to
5139         bad_array_new_length (LWG 3237).
5140         * testsuite/20_util/polymorphic_allocator/lwg3237.cc: New test.
5141
5142         * include/std/type_traits (__cpp_lib_unwrap_ref): Define (LWG 3348).
5143         * include/std/version (__cpp_lib_unwrap_ref): Likewise.
5144         * testsuite/20_util/unwrap_reference/1.cc: Check macro.
5145         * testsuite/20_util/unwrap_reference/3.cc: New test.
5146
5147         * include/std/numeric (midpoint(T8, T*)): Do not check for complete
5148         type during overload resolution, use static assert instead (LWG 3200).
5149         * testsuite/26_numerics/midpoint/pointer.cc: Do not test with
5150         incomplete type.
5151         * testsuite/26_numerics/midpoint/pointer_neg.cc: New test.
5152
5153         * include/std/span (span(T (&)[N])): Use non-deduced context to
5154         prevent first parameter from interfering with class template argument
5155         deduction (LWG 3369).
5156         * testsuite/23_containers/span/deduction.cc: Add missing 'const'.
5157         * testsuite/23_containers/span/lwg3255.cc: Check for construction from
5158         rvalues.
5159
5160         * include/std/span (span::const_iterator, span::const_reverse_iterator)
5161         (span::cbegin(), span::cend(), span::crbegin(), span::crend()):
5162         Remove (LWG 3320).
5163         * testsuite/23_containers/span/everything.cc: Replace uses of cbegin
5164         and cend.
5165         * testsuite/20_util/specialized_algorithms/destroy/constrained.cc:
5166         Likewise.
5167         * testsuite/20_util/specialized_algorithms/uninitialized_copy/
5168         constrained.cc: Likewise.
5169         * testsuite/20_util/specialized_algorithms/
5170         uninitialized_default_construct/constrained.cc: Likewise.
5171         * testsuite/20_util/specialized_algorithms/uninitialized_fill/
5172         constrained.cc: Likewise.
5173         * testsuite/20_util/specialized_algorithms/uninitialized_move/
5174         constrained.cc: Likewise.
5175         * testsuite/20_util/specialized_algorithms/
5176         uninitialized_value_construct/constrained.cc: Likewise.
5177
5178         * include/bits/range_access.h (range_size_t): Define alias template.
5179         * include/std/ranges (all_view): Rename to views::all_t (LWG 3335).
5180         * testsuite/std/ranges/adaptors/filter.cc: Adjust to new name.
5181
5182         * include/std/ranges (filter_view, transform_view, take_view)
5183         (join_view, split_view, reverse_view): Remove commented-out converting
5184         constructors (LWG 3280).
5185
5186         * include/std/memory (uninitialized_construct_using_allocator): Use
5187         std::construct_at (LWG 3321).
5188
5189         * include/std/memory_resource (polymorphic_allocator::allocate_bytes)
5190         (polymorphic_allocator::allocate_object)
5191         (polymorphic_allocator::new_object): Add nodiscard attribute (LWG3304).
5192
5193         LWG 3379. "safe" in several library names is misleading
5194         * include/bits/range_access.h (enable_safe_range): Rename to
5195         enable_borrowed_range.
5196         (__detail::__maybe_safe_range): Rename to __maybe_borrowed_range.
5197         (safe_range): Rename to borrowed_range.
5198         * include/bits/ranges_algo.h: Adjust to use new names.
5199         * include/bits/ranges_algobase.h: Likewise.
5200         * include/bits/ranges_uninitialized.h: Likewise.
5201         * include/std/ranges: Likewise.
5202         (safe_iterator_t): Rename to borrowed_iterator_t.
5203         (safe_subrange_t): Rename to borrowed_subrange_t.
5204         * include/std/span: Adjust to use new names.
5205         * include/std/string_view: Likewise.
5206         * include/experimental/string_view: Likewise.
5207         * testsuite/std/ranges/access/begin.cc: Likewise.
5208         * testsuite/std/ranges/access/cbegin.cc: Likewise.
5209         * testsuite/std/ranges/access/cdata.cc: Likewise.
5210         * testsuite/std/ranges/access/cend.cc: Likewise.
5211         * testsuite/std/ranges/access/crbegin.cc: Likewise.
5212         * testsuite/std/ranges/access/crend.cc: Likewise.
5213         * testsuite/std/ranges/access/data.cc: Likewise.
5214         * testsuite/std/ranges/access/end.cc: Likewise.
5215         * testsuite/std/ranges/access/rbegin.cc: Likewise.
5216         * testsuite/std/ranges/access/rend.cc: Likewise.
5217         * testsuite/std/ranges/safe_range.cc: Likewise.
5218         * testsuite/std/ranges/safe_range_types.cc: Likewise.
5219         * testsuite/util/testsuite_iterators.h: Likewise.
5220
5221         * include/std/ranges (tuple_element<0, const subrange<I, S, K>>)
5222         (tuple_element<1, const subrange<I, S, K>>): Add partial
5223         specializations (LWG 3398).
5224         * testsuite/std/ranges/subrange/tuple_like.cc: New test.
5225
5226         * include/bits/ranges_algo.h (__find_fn, __find_first_of_fn)
5227         (__adjacent_find_fn, __remove_if_fn, __remove_copy_if_fn)
5228         (__unique_fn, __unique_copy_fn): Remove redundant conversions to bool.
5229
5230 2020-02-18  Patrick Palka  <ppalka@redhat.com>
5231
5232         P1983R0 Wording for GB301, US296, US292, US291, and US283
5233         * include/std/ranges (filter_view::pred): New member function.
5234         (join_view::_Iterator::_Iterator): Remove now-redundant comment since
5235         P1983R0 fixes the highlighted issue in the same way.
5236         (join_view::_Iterator<_Const>): Add friend
5237         join_view::_Iterator<!_Const>.
5238         (join_view::_M_inner): Remove mutable specifier, effectively reverting
5239         the proposed wording changes of P3278.
5240         (join_view::begin): Refine the condition for when to return a const
5241         iterator.
5242         (split_view::_OuterIter::_OuterIter): Adjust constraints.
5243         * testsuite/std/ranges/adaptors/filter.cc: Test that filter_view::pred
5244         exists and works.
5245
5246 2020-02-18  Jonathan Wakely  <jwakely@redhat.com>
5247
5248         PR libstdc++/93818
5249         * include/std/ranges (_RangeAdaptor): Add deduction guide.
5250         (filter_view::_Iterator): Add alias _Vp_iter and use in place of
5251         iterator_t<_Vp>.
5252         (filter_view::_Iterator::_S_iter_cat()): Add 'typename'.
5253         (transform_view::_Iterator): Add alias _Base_iter and use in place of
5254         iterator_t<_Base>.
5255         (transform_view::_Iterator::_S_iter_cat()): Add 'typename'.
5256         (join_view::_Iterator): Add _Outer_iter and _Inner_iter aliases.
5257         (join_view::_Iterator::_S_iter_cat()): Add 'typename'.
5258         (split_view::_InnerIter::_S_iter_cat()): Likewise.
5259
5260         * testsuite/20_util/integer_comparisons/equal.cc: Fix invalid
5261         assumption that long is wider than int.
5262         * testsuite/20_util/integer_comparisons/greater_equal.cc: Likewise.
5263         * testsuite/20_util/integer_comparisons/less.cc: Likewise.
5264         * testsuite/20_util/integer_comparisons/less_equal.cc: Likewise.
5265         * testsuite/20_util/integer_comparisons/not_equal.cc: Likewise.
5266
5267         P1976R2 Fixed-size span construction from dynamic range
5268         * include/std/span (__cpp_lib_span): Update value.
5269         (span(It, size_type), span(It, End)): Make conditionally explicit. Add
5270         assertion.
5271         (span(R&&), span(const span<OType, OExtent>&)): Likewise and relax
5272         constraints.
5273         (span::first<Count>(), span::last<Count>()): Use explicit type in
5274         return statement.
5275         (as_bytes, as_writable_bytes): Likewise.
5276         * include/std/version (__cpp_lib_span): Update value.
5277         * testsuite/23_containers/span/1.cc: Check new value.
5278         * testsuite/23_containers/span/2.cc: Check new value.
5279         * testsuite/23_containers/span/explicit.cc: New test.
5280
5281         * include/std/span (span::__is_compatible_array): Simplify alias
5282         template by using requires-clause.
5283         (span::__is_compatible_ref): New alias template for constraining
5284         constructors.
5285         (span::__is_compatible_iterator, span::__is_compatible_range): Remove.
5286         (span(It, size_type), span(It, End)): Use __is_compatible_ref.
5287         (span(T(&)[N], span(array<T, N>&), span(const array<T, N>&)): Remove
5288         redundant parentheses.
5289         (span(R&&)): Add missing constraints.
5290
5291         * include/std/span (span): Reorder members and rename template
5292         parameters to match declarations in the C++2a working paper.
5293
5294         P2116R0 Remove tuple-like protocol support from fixed-extent span
5295         * include/std/span (get, tuple_size, tuple_element): Remove.
5296         * testsuite/23_containers/span/everything.cc: Remove checks for
5297         tuple-like API.
5298         * testsuite/23_containers/span/get_neg.cc: Remove.
5299         * testsuite/23_containers/span/tuple_element_dynamic_neg.cc: Remove.
5300         * testsuite/23_containers/span/tuple_element_oob_neg.cc: Remove.
5301         * testsuite/23_containers/span/tuple_size_neg.cc: Remove.
5302
5303 2020-02-17  Patrick Palka  <ppalka@redhat.com>
5304
5305         P2106R0 Alternative wording for GB315 and GB316
5306         * include/bits/ranges_algo.h (in_fun_result): New.
5307         (for_each_result, for_each_n_result): Change into an alias of
5308         in_fun_result.
5309         (in_in_result): New.
5310         (mismatch_result): Change into an alias of in_in_result.
5311         (copy_if_result): Change into an alias of in_out_result.
5312         (swap_ranges_result): Change into an alias of in_in_result.
5313         (unary_transform_result): Change into an alias of in_out_result.
5314         (in_in_out_result): New.
5315         (binary_transform_result): Change into an alias of in_in_out_result.
5316         (replace_copy_result, replace_copy_if_result, remove_copy_if_result,
5317         remove_copy_result, unique_copy_result, reverse_copy_result,
5318         rotate_copy_result, partial_sort_copy_result): Change into an alias of
5319         in_out_result.
5320         (in_out_out_result): New.
5321         (partition_copy_result, merge_result): Change into an alias of
5322         in_out_out_result.
5323         (set_union_result, set_intersection_result): Change into an alias of
5324         in_in_out_result.
5325         (set_difference_result): Change into an alias of in_out_result.
5326         (set_symmetric_difference): Change into an alias of in_in_out_result.
5327         (min_max_result): New.
5328         (minmax_result, minmax_element_result): Change into an alias of
5329         min_max_result.
5330         (in_found_result): New.
5331         (next_permutation_result, prev_permutation_result): Change into an alias
5332         of in_found_result.
5333         (__next_permutation_fn::operator(), __prev_permutation_fn::operator()):
5334         Adjust following changes to next_permutation_result and
5335         prev_permutation_result.
5336         * include/bits/ranges_algobase.h (in_out_result): New.
5337         (copy_result, move_result, move_backward_result, copy_backward_result,
5338         copy_n_result): Change into an alias of in_out_result.
5339         * include/bits/ranges_uninitialized.h (uninitialized_copy_result,
5340         uninitialized_copy_n_result, uninitialized_move_result,
5341         uninitialized_move_n_result): Likewise.
5342         * testsuite/25_algorithms/next_permutation/constrained.cc: Adjust uses of
5343         structured bindings.
5344         * testsuite/25_algorithms/prev_permutation/constrained.cc: Likewise.
5345
5346         P1243R4 Rangify new algorithms
5347         * include/bits/ranges_algo.h (for_each_n_result, __for_each_n_fn,
5348         for_each_n, __sample_fn, sample, __clamp_fn, clamp): New.
5349         * testsuite/25_algorithms/clamp/constrained.cc: New test.
5350         * testsuite/25_algorithms/for_each/constrained.cc: Augment test.
5351         * testsuite/25_algorithms/sample/constrained.cc: New test.
5352
5353 2020-02-17  Jonathan Wakely  <jwakely@redhat.com>
5354
5355         P1964R2 Wording for boolean-testable
5356         * include/bits/ranges_algo.h (__find_fn, __find_first_of_fn)
5357         (__adjacent_find_fn): Cast result of predicate to bool.
5358         * include/std/concepts (__boolean): Remove.
5359         (__detail::__boolean_testable_impl, __detail::__boolean_testable): Add
5360         new helper concepts.
5361         (__detail::__weakly_eq_cmp_with, totally_ordered, totally_ordered_with)
5362         (predicate): Use __boolean_testable instead of boolean.
5363         * libsupc++/compare (__detail::__partially_ordered, _Synth3way):
5364         Likewise.
5365
5366         P1970R2 Consistency for size() functions: Add ranges::ssize
5367         * include/bits/range_access.h (_SSize, ssize): Define for C++20.
5368         * testsuite/std/ranges/access/ssize.cc: New test.
5369
5370         P1956R1 On the names of low-level bit manipulation functions
5371         * include/bits/hashtable_policy.h: Update comment.
5372         * include/std/bit (__ispow2, __ceil2, __floor2, __log2p1): Rename.
5373         (ispow2, ceil2, floor2, log2p1): Likewise.
5374         (__cpp_lib_int_pow2): Add feature test macro.
5375         * include/std/charconv (__to_chars_len_2): Adjust use of __log2p1.
5376         * include/std/memory (assume_aligned): Adjust use of ispow2.
5377         * include/std/version (__cpp_lib_int_pow2): Add.
5378         * libsupc++/new_opa.cc: Adjust use of __ispow2.
5379         * src/c++17/memory_resource.cc: Likewise, and for __ceil2 and __log2p1.
5380         * testsuite/17_intro/freestanding.cc: Adjust use of ispow2.
5381         * testsuite/26_numerics/bit/bit.pow.two/ceil2.cc: Rename to ...
5382         * testsuite/26_numerics/bit/bit.pow.two/bit_ceil.cc: ... here.
5383         * testsuite/26_numerics/bit/bit.pow.two/ceil2_neg.cc: Rename to ...
5384         * testsuite/26_numerics/bit/bit.pow.two/bit_ceil_neg.cc: ... here.
5385         * testsuite/26_numerics/bit/bit.pow.two/floor2.cc: Rename to ...
5386         * testsuite/26_numerics/bit/bit.pow.two/bit_floor.cc: ... here.
5387         * testsuite/26_numerics/bit/bit.pow.two/log2p1.cc: Rename to ...
5388         * testsuite/26_numerics/bit/bit.pow.two/bit_width.cc: ... here.
5389         * testsuite/26_numerics/bit/bit.pow.two/ispow2.cc: Rename to ...
5390         * testsuite/26_numerics/bit/bit.pow.two/has_single_bit.cc: ... here.
5391
5392         * include/std/charconv: Add comment.
5393
5394         PR libstdc++/92546 (partial)
5395         * include/bits/random.h (uniform_random_bit_generator): Move definition
5396         to <bits/uniform_int_dist.h>.
5397         * include/bits/ranges_algo.h: Include <bits/uniform_int_dist.h> instead
5398         of <bits/random.h>.
5399         * include/bits/ranges_algobase.h: Do not include <cmath>.
5400         * include/bits/uniform_int_dist.h (uniform_random_bit_generator):
5401         Move here.
5402         * include/std/ranges: Do not include <limits>.
5403         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error lineno.
5404
5405         PR libstdc++/92546 (partial)
5406         * include/Makefile.am: Add new header.
5407         * include/Makefile.in: Regenerate.
5408         * include/bits/int_limits.h: New header.
5409         * include/bits/parse_numbers.h (__select_int::_Select_int): Replace
5410         numeric_limits with __detail::__int_limits.
5411         * include/std/bit (__rotl, __rotr, __countl_zero, __countl_one)
5412         (__countr_zero, __countr_one, __popcount, __ceil2, __floor2, __log2p1):
5413         Likewise.
5414         * include/std/charconv (__to_chars_8, __from_chars_binary)
5415         (__from_chars_alpha_to_num, from_chars): Likewise.
5416         * include/std/memory_resource (polymorphic_allocator::allocate)
5417         (polymorphic_allocator::allocate_object): Likewise.
5418         * include/std/string_view (basic_string_view::_S_compare): Likewise.
5419         * include/std/utility (in_range): Likewise.
5420         * testsuite/20_util/integer_comparisons/in_range_neg.cc: Adjust for
5421         extra error about incomplete type __int_limits<bool>.
5422         * testsuite/26_numerics/bit/bit.count/countl_one.cc: Include <limits>.
5423         * testsuite/26_numerics/bit/bit.count/countl_zero.cc: Likewise.
5424         * testsuite/26_numerics/bit/bit.count/countr_one.cc: Likewise.
5425         * testsuite/26_numerics/bit/bit.count/countr_zero.cc: Likewise.
5426         * testsuite/26_numerics/bit/bit.count/popcount.cc: Likewise.
5427         * testsuite/26_numerics/bit/bit.pow.two/ceil2_neg.cc: Likewise.
5428         * testsuite/26_numerics/bit/bit.pow.two/ceil2.cc: Likewise.
5429         * testsuite/26_numerics/bit/bit.pow.two/floor2.cc: Likewise.
5430         * testsuite/26_numerics/bit/bit.pow.two/ispow2.cc: Likewise.
5431         * testsuite/26_numerics/bit/bit.pow.two/log2p1.cc: Likewise.
5432         * testsuite/26_numerics/bit/bit.rotate/rotl.cc: Likewise.
5433         * testsuite/26_numerics/bit/bit.rotate/rotr.cc: Likewise.
5434
5435         * python/libstdcxx/v6/printers.py (StdCmpCatPrinter.to_string): Update
5436         value for partial_ordering::unordered.
5437
5438         * include/bits/iterator_concepts.h (indirectly_copyable_storable): Add
5439         const-qualified expression variations.
5440         * include/std/concepts (copyable): Likewise.
5441
5442         * include/std/type_traits (__is_standard_integer): New helper trait.
5443         * include/std/utility (cmp_equal, cmp_not_equal, cmp_less, cmp_greater)
5444         (cmp_less_equal, cmp_greater_equal, in_range): Define for C++20.
5445         * include/std/version (__cpp_lib_integer_comparison_functions): Define.
5446         * testsuite/20_util/integer_comparisons/1.cc: New test.
5447         * testsuite/20_util/integer_comparisons/2.cc: New test.
5448         * testsuite/20_util/integer_comparisons/equal.cc: New test.
5449         * testsuite/20_util/integer_comparisons/equal_neg.cc: New test.
5450         * testsuite/20_util/integer_comparisons/greater_equal.cc: New test.
5451         * testsuite/20_util/integer_comparisons/greater_equal_neg.cc: New test.
5452         * testsuite/20_util/integer_comparisons/greater_neg.cc: New test.
5453         * testsuite/20_util/integer_comparisons/in_range.cc: New test.
5454         * testsuite/20_util/integer_comparisons/in_range_neg.cc: New test.
5455         * testsuite/20_util/integer_comparisons/less.cc: New test.
5456         * testsuite/20_util/integer_comparisons/less_equal.cc: New test.
5457         * testsuite/20_util/integer_comparisons/less_equal_neg.cc: New test.
5458         * testsuite/20_util/integer_comparisons/less_neg.cc: New test.
5459         * testsuite/20_util/integer_comparisons/not_equal.cc: New test.
5460         * testsuite/20_util/integer_comparisons/not_equal_neg.cc: New test.
5461
5462 2020-02-16  Patrick Palka  <ppalka@redhat.com>
5463
5464         * include/bits/ranges_algo.h (__lexicographical_compare_fn::operator()):
5465         Move code after an early exit constexpr if to under an else branch.
5466         * include/bits/ranges_algobase.h (__equal_fn::operator()): Likewise.
5467
5468 2020-02-15  Patrick Palka  <ppalka@redhat.com>
5469
5470         * include/bits/ranges_algo.h: Adjust whitespace and formatting.
5471         * include/bits/ranges_algobase.h: Likewise.
5472         * include/bits/ranges_uninitialized.h: Likewise.
5473
5474         * include/bits/ranges_algo.h: (adjacent_find, all_of, any_of,
5475         binary_search, copy_if, count, count_if, equal_range, find, find_end,
5476         find_first_of, find_if, find_if_not, for_each, generate, generate_n,
5477         includes, inplace_merge, is_heap, is_heap_until, is_partitioned,
5478         is_permutation, is_sorted, is_sorted_until, lexicographical_compare,
5479         lower_bound, make_heap, max, max_element, merge, min, min_element,
5480         minmax, minmax_element, mismatch, next_permutation, none_of,
5481         nth_element, partial_sort, partial_sort_copy, partition, partition_copy,
5482         partition_point, pop_heap, prev_permutation, push_heap, remove,
5483         remove_copy, remove_copy_if, remove_if, replace, replace_copy,
5484         replace_copy_if, replace_if, reverse, reverse_copy, rotate, rotate_copy,
5485         search, search_n, set_difference, set_intersection,
5486         set_symmetric_difference, set_union, shuffle, sort, sort_heap,
5487         stable_partition, stable_sort, swap_ranges, transform, unique,
5488         unique_copy, upper_bound): Convert into function objects.
5489         * include/bits/ranges_algobase.h: (equal, copy, move, copy_n, fill_n,
5490         fill, move_backward, copy_backward): Likewise.
5491         * include/bits/ranges_uninitialized.h (uninitialized_default_construct,
5492         uninitialized_default_construct_n, uninitialized_value_construct,
5493         uninitialized_value_construct_n, uninitialized_copy,
5494         uninitialized_copy_n, uninitialized_move, uninitialized_move_n,
5495         uninitialized_fill, uninitialized_fill_n, construct_at, destroy_at,
5496         destroy, destroy_n): Likewise.
5497
5498         * include/bits/ranges_algo.h (ranges::__find_end): Fold into ...
5499         (ranges::find_end): ... here.
5500         (ranges::__lexicographical_compare): Fold into ...
5501         (ranges::lexicographical_compare): ... here.
5502         * include/bits/ranges_algobase.h (ranges::__equal): Fold into ...
5503         (ranges::equal): ... here.
5504
5505 2020-02-15  Jonathan Wakely  <jwakely@redhat.com>
5506
5507         * include/bits/erase_if.h (__cpp_lib_erase_if): Define to 202002L.
5508         * include/std/deque: Likewise.
5509         * include/std/forward_list: Likewise.
5510         * include/std/list: Likewise.
5511         * include/std/string: Likewise.
5512         * include/std/vector: Likewise.
5513         * include/std/version: Likewise.
5514         * testsuite/23_containers/deque/erasure.cc: Test for new value.
5515         * testsuite/23_containers/forward_list/erasure.cc: Likewise.
5516         * testsuite/23_containers/list/erasure.cc: Likewise.
5517         * testsuite/23_containers/map/erasure.cc: Likewise.
5518         * testsuite/23_containers/set/erasure.cc: Likewise.
5519         * testsuite/23_containers/unordered_map/erasure.cc: Likewise.
5520         * testsuite/23_containers/unordered_set/erasure.cc: Likewise.
5521         * testsuite/23_containers/vector/erasure.cc: Likewise.
5522
5523 2020-02-15  Jonathan Wakely  <jwakely@redhat.com>
5524
5525         * include/bits/random.h (uniform_random_bit_generator): Require min()
5526         and max() to be constant expressions and min() to be less than max().
5527         * testsuite/26_numerics/random/concept.cc: Check additional cases.
5528         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error lineno.
5529
5530 2020-02-13  Patrick Palka  <ppalka@redhat.com>
5531
5532         * include/Makefile.am: Add <bits/ranges_uninitialized.h>.
5533         * include/Makefile.in: Regenerate.
5534         * include/bits/ranges_uninitialized.h: New header.
5535         * include/std/memory: Include it.
5536         * testsuite/20_util/specialized_algorithms/destroy/constrained.cc: New
5537         test.
5538         * .../uninitialized_copy/constrained.cc: New test.
5539         * .../uninitialized_default_construct/constrained.cc: New test.
5540         * .../uninitialized_fill/constrained.cc: New test.
5541         * .../uninitialized_move/constrained.cc: New test.
5542         * .../uninitialized_value_construct/constrained.cc: New test.
5543
5544         * include/Makefile.am: Add bits/ranges_algobase.h
5545         * include/Makefile.in: Regenerate.
5546         * bits/ranges_algo.h: Include <bits/ranges_algobase.h> and refactor
5547         existing #includes.
5548         (__detail::__is_normal_iterator, __detail::is_reverse_iterator,
5549         __detail::__is_move_iterator, copy_result, move_result,
5550         __equal, equal, copy_result, move_result, move_backward_result,
5551         copy_backward_result, __copy_or_move_backward, __copy_or_move, copy,
5552         move, copy_backward, move_backward, copy_n_result, copy_n, fill_n,
5553         fill): Split out into ...
5554         * bits/range_algobase.h: ... this new header.
5555
5556 2020-02-12  Patrick Palka  <ppalka@redhat.com>
5557
5558         LWG 3389 and LWG 3390
5559         * include/bits/stl_iterator.h (move_move_iterator): Use std::move when
5560         constructing the move_iterator with __i.
5561         (counted_iterator::counted_iterator): Use std::move when initializing
5562         M_current with __i.
5563         * testsuite/24_iterators/counted_iterator/lwg3389.cc: New test.
5564         * testsuite/24_iterators/move_iterator/lwg3390.cc: New test.
5565
5566 2020-02-12  Sandra Loosemore  <sandra@codesourcery.com>
5567
5568         PR libstdc++/79193
5569         PR libstdc++/88999
5570
5571         * configure: Regenerated.
5572
5573 2020-02-12  François Dumont  <fdumont@gcc.gnu.org>
5574
5575         * include/bits/hashtable.h
5576         (_Hashtable<>(_Hashtable&&, std::allocator_type&)): Add
5577         missing std namespace qualification to forward call.
5578
5579 2020-02-09  Jonathan Wakely  <jwakely@redhat.com>
5580
5581         * testsuite/20_util/function_objects/range.cmp/equal_to.cc: Fix
5582         comment.
5583         * testsuite/20_util/function_objects/range.cmp/less.ccL Likewise.
5584
5585         * include/std/ranges: Fix non-ASCII characters in comment.
5586
5587         * include/bits/range_cmp.h (__detail::__eq_builtin_ptr_cmp): Require
5588         equality comparison to be valid and return bool.
5589         (__detail::__less_builtin_ptr_cmp): Likewise for less-than comparison.
5590         * testsuite/20_util/function_objects/range.cmp/equal_to.cc: Check
5591         type with ambiguous conversion to fundamental types.
5592         * testsuite/20_util/function_objects/range.cmp/less.cc: Likewise.
5593
5594 2020-02-07  Jonathan Wakely  <jwakely@redhat.com>
5595
5596         * include/bits/iterator_concepts.h (iter_difference_t, iter_value_t):
5597         Use remove_cvref_t.
5598         (readable_traits): Rename to indirectly_readable_traits.
5599         (readable): Rename to indirectly_readable.
5600         (writable): Rename to indirectly_writable.
5601         (__detail::__iter_exchange_move): Do not use remove_reference_t.
5602         (indirectly_swappable): Adjust requires expression parameter types.
5603         expression.
5604         * include/bits/ranges_algo.h (ranges::transform, ranges::replace)
5605         (ranges::replace_if, ranges::generate_n, ranges::generate)
5606         (ranges::remove): Use new name for writable.
5607         * include/bits/stl_iterator.h (__detail::__common_iter_has_arrow):
5608         Use new name for readable.
5609         * include/ext/pointer.h (readable_traits<_Pointer_adapter<P>>): Use
5610         new name for readable_traits.
5611         * testsuite/24_iterators/associated_types/readable.traits.cc: Likewise.
5612         * testsuite/24_iterators/indirect_callable/projected.cc: Adjust for
5613         new definition of indirectly_readable.
5614
5615         * include/bits/stl_iterator.h (__detail::__common_iter_ptr): Change
5616         to take parameters of common_iterator, instead of the common_iterator
5617         type itself. Fix argument for __common_iter_has_arrow constraint.
5618         (iterator_traits<common_iterator<I, S>>::pointer): Adjust.
5619
5620 2020-02-07  Jonathan Wakely  <jwakely@redhat.com>
5621
5622         * include/std/ranges (iota_view): Add braces to prevent -Wempty-body
5623         warning.
5624         (basic_istream_view::_Iterator::operator++()): Add missing return.
5625
5626 2020-02-07  Patrick Palka  <ppalka@redhat.com>
5627
5628         * include/bits/ranges_algo.h: Remove extraneous &&.
5629
5630         * include/std/ranges (ranges::__detail::__stream_extractable,
5631         ranges::basic_istream_view, ranges::istream_view): Define.
5632         * testsuite/std/ranges/istream_view: New test.
5633
5634         Implement C++20 range adaptors
5635         * include/std/ranges: Include <bits/refwrap.h> and <tuple>.
5636         (subrange::_S_store_size): Mark as const instead of constexpr to
5637         avoid what seems to be a bug in GCC.
5638         (__detail::__box): Give it defaulted copy and move constructors.
5639         (ranges::views::_Single::operator()): Mark constexpr.
5640         (ranges::views::_Iota::operator()): Mark constexpr.
5641         (__detail::Empty): Define.
5642         (ranges::views::__closure::_RangeAdaptor,
5643         ranges::views::__closure::_RangeAdaptorClosure, ref_view, all_view,
5644         ranges::views::all, ranges::__detail::find_if,
5645         ranges::__detail::find_if_not, ranges::__detail::mismatch,
5646         ranges::detail::min, filter_view, ranges::views::filter, transform_view,
5647         ranges::views::transform, take_view, ranges::views::take,
5648         take_while_view, ranges::views::take_while, drop_view,
5649         ranges::views::drop, join_view, ranges::views::join,
5650         __detail::require_constant, __detail::tiny_range, split_view,
5651         ranges::views::split, ranges::views::_Counted, ranges::views::counted,
5652         common_view, ranges::views::common, reverse_view,
5653         ranges::views::reverse,
5654         ranges::views::__detail::__is_reversible_subrange,
5655         ranges::views::__detail::__is_reverse_view, reverse_view,
5656         ranges::views::reverse, __detail::__has_tuple_element, elements_view,
5657         ranges::views::elements, ranges::views::keys, ranges::views::values):
5658         Define.
5659         (views): Alias for ranges::views.
5660         (tuple_size<ranges::subrange<>>, tuple_element<0, ranges::subrange>,
5661         tuple_element<1, ranges::subrange>): New partial specializations.
5662         * testsuite/std/ranges/adaptors/all.cc: New test.
5663         * testsuite/std/ranges/adaptors/common.cc: Likewise.
5664         * testsuite/std/ranges/adaptors/counted.cc: Likewise.
5665         * testsuite/std/ranges/adaptors/drop.cc: Likewise.
5666         * testsuite/std/ranges/adaptors/drop_while.cc: Likewise.
5667         * testsuite/std/ranges/adaptors/elements.cc: Likewise.
5668         * testsuite/std/ranges/adaptors/filter.cc: Likewise.
5669         * testsuite/std/ranges/adaptors/join.cc: Likewise.
5670         * testsuite/std/ranges/adaptors/reverse.cc: Likewise.
5671         * testsuite/std/ranges/adaptors/split.cc: Likewise.
5672         * testsuite/std/ranges/adaptors/take.cc: Likewise.
5673         * testsuite/std/ranges/adaptors/take_while.cc: Likewise.
5674         * testsuite/std/ranges/adaptors/transform.cc: Likewise.
5675
5676 2020-02-07  Jonathan Wakely  <jwakely@redhat.com>
5677
5678         * libsupc++/compare (__cmp_cat::type): Define typedef for underlying
5679         type of enumerations and comparison category types.
5680         (__cmp_cat::_Ord, __cmp_cat::_Ncmp): Add underlying type.
5681         (__cmp_cat::_Ncmp::unordered): Change value to 2.
5682         (partial_ordering::_M_value, weak_ordering::_M_value)
5683         (strong_ordering::_M_value): Change type to __cmp_cat::type.
5684         (partial_ordering::_M_is_ordered): Remove data member.
5685         (partial_ordering): Use second bit of _M_value for unordered. Adjust
5686         comparison operators.
5687         (weak_ordering::operator partial_ordering): Simplify to remove
5688         branches.
5689         (operator<=>(unspecified, weak_ordering)): Likewise.
5690         (strong_ordering::operator partial_ordering): Likewise.
5691         (strong_ordering::operator weak_ordering): Likewise.
5692         (operator<=>(unspecified, strong_ordering)): Likewise.
5693         * testsuite/18_support/comparisons/categories/partialord.cc: New test.
5694         * testsuite/18_support/comparisons/categories/strongord.cc: New test.
5695         * testsuite/18_support/comparisons/categories/weakord.cc: New test.
5696
5697         * include/std/ranges (iota_view::_Iterator): Fix typo in name of
5698         __cpp_lib_three_way_comparison macro and use deduced return type for
5699         operator<=>.
5700         * testsuite/std/ranges/iota/iterator.cc: New test.
5701
5702 2020-02-07  Patrick Palka  <ppalka@redhat.com>
5703             Jonathan Wakely  <jwakely@redhat.com>
5704
5705         Implement C++20 constrained algorithms
5706         * include/Makefile.am: Add new header.
5707         * include/Makefile.in: Regenerate.
5708         * include/std/algorithm: Include <bits/ranges_algo.h>.
5709         * include/bits/ranges_algo.h: New file.
5710         * testsuite/25_algorithms/adjacent_find/constrained.cc: New test.
5711         * testsuite/25_algorithms/all_of/constrained.cc: New test.
5712         * testsuite/25_algorithms/any_of/constrained.cc: New test.
5713         * testsuite/25_algorithms/binary_search/constrained.cc: New test.
5714         * testsuite/25_algorithms/copy/constrained.cc: New test.
5715         * testsuite/25_algorithms/copy_backward/constrained.cc: New test.
5716         * testsuite/25_algorithms/copy_if/constrained.cc: New test.
5717         * testsuite/25_algorithms/copy_n/constrained.cc: New test.
5718         * testsuite/25_algorithms/count/constrained.cc: New test.
5719         * testsuite/25_algorithms/count_if/constrained.cc: New test.
5720         * testsuite/25_algorithms/equal/constrained.cc: New test.
5721         * testsuite/25_algorithms/equal_range/constrained.cc: New test.
5722         * testsuite/25_algorithms/fill/constrained.cc: New test.
5723         * testsuite/25_algorithms/fill_n/constrained.cc: New test.
5724         * testsuite/25_algorithms/find/constrained.cc: New test.
5725         * testsuite/25_algorithms/find_end/constrained.cc: New test.
5726         * testsuite/25_algorithms/find_first_of/constrained.cc: New test.
5727         * testsuite/25_algorithms/find_if/constrained.cc: New test.
5728         * testsuite/25_algorithms/find_if_not/constrained.cc: New test.
5729         * testsuite/25_algorithms/for_each/constrained.cc: New test.
5730         * testsuite/25_algorithms/generate/constrained.cc: New test.
5731         * testsuite/25_algorithms/generate_n/constrained.cc: New test.
5732         * testsuite/25_algorithms/heap/constrained.cc: New test.
5733         * testsuite/25_algorithms/includes/constrained.cc: New test.
5734         * testsuite/25_algorithms/inplace_merge/constrained.cc: New test.
5735         * testsuite/25_algorithms/is_partitioned/constrained.cc: New test.
5736         * testsuite/25_algorithms/is_permutation/constrained.cc: New test.
5737         * testsuite/25_algorithms/is_sorted/constrained.cc: New test.
5738         * testsuite/25_algorithms/is_sorted_until/constrained.cc: New test.
5739         * testsuite/25_algorithms/lexicographical_compare/constrained.cc: New
5740         test.
5741         * testsuite/25_algorithms/lower_bound/constrained.cc: New test.
5742         * testsuite/25_algorithms/max/constrained.cc: New test.
5743         * testsuite/25_algorithms/max_element/constrained.cc: New test.
5744         * testsuite/25_algorithms/merge/constrained.cc: New test.
5745         * testsuite/25_algorithms/min/constrained.cc: New test.
5746         * testsuite/25_algorithms/min_element/constrained.cc: New test.
5747         * testsuite/25_algorithms/minmax/constrained.cc: New test.
5748         * testsuite/25_algorithms/minmax_element/constrained.cc: New test.
5749         * testsuite/25_algorithms/mismatch/constrained.cc: New test.
5750         * testsuite/25_algorithms/move/constrained.cc: New test.
5751         * testsuite/25_algorithms/move_backward/constrained.cc: New test.
5752         * testsuite/25_algorithms/next_permutation/constrained.cc: New test.
5753         * testsuite/25_algorithms/none_of/constrained.cc: New test.
5754         * testsuite/25_algorithms/nth_element/constrained.cc: New test.
5755         * testsuite/25_algorithms/partial_sort/constrained.cc: New test.
5756         * testsuite/25_algorithms/partial_sort_copy/constrained.cc: New test.
5757         * testsuite/25_algorithms/partition/constrained.cc: New test.
5758         * testsuite/25_algorithms/partition_copy/constrained.cc: New test.
5759         * testsuite/25_algorithms/partition_point/constrained.cc: New test.
5760         * testsuite/25_algorithms/prev_permutation/constrained.cc: New test.
5761         * testsuite/25_algorithms/remove/constrained.cc: New test.
5762         * testsuite/25_algorithms/remove_copy/constrained.cc: New test.
5763         * testsuite/25_algorithms/remove_copy_if/constrained.cc: New test.
5764         * testsuite/25_algorithms/remove_if/constrained.cc: New test.
5765         * testsuite/25_algorithms/replace/constrained.cc: New test.
5766         * testsuite/25_algorithms/replace_copy/constrained.cc: New test.
5767         * testsuite/25_algorithms/replace_copy_if/constrained.cc: New test.
5768         * testsuite/25_algorithms/replace_if/constrained.cc: New test.
5769         * testsuite/25_algorithms/reverse/constrained.cc: New test.
5770         * testsuite/25_algorithms/reverse_copy/constrained.cc: New test.
5771         * testsuite/25_algorithms/rotate/constrained.cc: New test.
5772         * testsuite/25_algorithms/rotate_copy/constrained.cc: New test.
5773         * testsuite/25_algorithms/search/constrained.cc: New test.
5774         * testsuite/25_algorithms/search_n/constrained.cc: New test.
5775         * testsuite/25_algorithms/set_difference/constrained.cc: New test.
5776         * testsuite/25_algorithms/set_intersection/constrained.cc: New test.
5777         * testsuite/25_algorithms/set_symmetric_difference/constrained.cc: New
5778         test.
5779         * testsuite/25_algorithms/set_union/constrained.cc: New test.
5780         * testsuite/25_algorithms/shuffle/constrained.cc: New test.
5781         * testsuite/25_algorithms/sort/constrained.cc: New test.
5782         * testsuite/25_algorithms/stable_partition/constrained.cc: New test.
5783         * testsuite/25_algorithms/stable_sort/constrained.cc: New test.
5784         * testsuite/25_algorithms/swap_ranges/constrained.cc: New test.
5785         * testsuite/25_algorithms/transform/constrained.cc: New test.
5786         * testsuite/25_algorithms/unique/constrained.cc: New test.
5787         * testsuite/25_algorithms/unique_copy/constrained.cc: New test.
5788         * testsuite/25_algorithms/upper_bound/constrained.cc: New test.
5789
5790 2020-02-06  Jonathan Wakely  <jwakely@redhat.com>
5791
5792         * include/bits/stl_iterator.h (__detail::__common_iter_ptr): Fix PR
5793         number in comment. Fix indentation.
5794
5795         * include/bits/stl_algobase.h (__iter_swap, __iter_swap<true>): Remove
5796         redundant _GLIBCXX20_CONSTEXPR.
5797
5798         * include/std/ranges (viewable_range): Replace decay_t with
5799         remove_cvref_t (LWG 3375).
5800
5801 2020-02-05  Jonathan Wakely  <jwakely@redhat.com>
5802
5803         * include/bits/iterator_concepts.h (iter_reference_t)
5804         (iter_rvalue_reference_t, iter_common_reference_t, indirect_result_t):
5805         Remove workarounds for PR c++/67704.
5806         * testsuite/24_iterators/aliases.cc: New test.
5807
5808 2020-02-05  Patrick Palka  <ppalka@redhat.com>
5809
5810         * include/bits/stl_iterator.h (move_iterator::move_iterator): Move __i
5811         when initializing _M_current.
5812         (move_iterator::base): Split into two overloads differing in
5813         ref-qualifiers as in P1207R4 for C++20.
5814
5815 2020-02-04  Jonathan Wakely  <jwakely@redhat.com>
5816
5817         * include/std/functional (_GLIBCXX_NOT_FN_CALL_OP): Un-define after
5818         use.
5819
5820         PR libstdc++/93562
5821         * include/bits/unique_ptr.h (__uniq_ptr_impl::swap): Define.
5822         (unique_ptr::swap, unique_ptr<T[], D>::swap): Call it.
5823         * testsuite/20_util/unique_ptr/modifiers/93562.cc: New test.
5824
5825 2020-02-01  Andrew Burgess  <andrew.burgess@embecosm.com>
5826
5827         * configure: Regenerate.
5828
5829 2020-01-31  Patrick Palka  <ppalka@redhat.com>
5830
5831         * testsuite/24_iterators/range_operations/distance.cc: Do not assume
5832         test_range::end() returns the same type as test_range::begin().
5833         * testsuite/24_iterators/range_operations/next.cc: Likewise.
5834         * testsuite/24_iterators/range_operations/prev.cc: Likewise.
5835         * testsuite/util/testsuite_iterators.h (__gnu_test::test_range::end):
5836         Always return a sentinel<I>.
5837
5838 2020-01-29  Jonathan Wakely  <jwakely@redhat.com>
5839
5840         PR libstdc++/92895
5841         * include/std/stop_token (stop_token::stop_possible()): Call new
5842         _M_stop_possible() function.
5843         (stop_token::stop_requested()): Do not use stop_possible().
5844         (stop_token::binary_semaphore): New class, as temporary stand-in for
5845         std::binary_semaphore.
5846         (stop_token::_Stop_cb::_M_callback): Add noexcept to type.
5847         (stop_token::_Stop_cb::_M_destroyed, stop_token::_Stop_cb::_M_done):
5848         New data members for symchronization with stop_callback destruction.
5849         (stop_token::_Stop_cb::_Stop_cb): Make non-template.
5850         (stop_token::_Stop_cb::_M_linked, stop_token::_Stop_cb::_S_execute):
5851         Remove.
5852         (stop_token::_Stop_cb::_M_run): New member function.
5853         (stop_token::_Stop_state::_M_stopped, stop_token::_Stop_state::_M_mtx):
5854         Remove.
5855         (stop_token::_Stop_state::_M_owners): New data member to track
5856         reference count for ownership.
5857         (stop_token::_Stop_state::_M_value): New data member combining a
5858         spinlock, the stop requested flag, and the reference count for
5859         associated stop_source objects.
5860         (stop_token::_Stop_state::_M_requester): New data member for
5861         synchronization with stop_callback destruction.
5862         (stop_token::_Stop_state::_M_stop_possible()): New member function.
5863         (stop_token::_Stop_state::_M_stop_requested()): Inspect relevant bit
5864         of _M_value.
5865         (stop_token::_Stop_state::_M_add_owner)
5866         (stop_token::_Stop_state::_M_release_ownership)
5867         (stop_token::_Stop_state::_M_add_ssrc)
5868         (stop_token::_Stop_state::_M_sub_ssrc): New member functions for
5869         updating reference counts.
5870         (stop_token::_Stop_state::_M_lock, stop_token::_Stop_state::_M_unlock)
5871         (stop_token::_Stop_state::_M_lock, stop_token::_Stop_state::_M_unlock)
5872         (stop_token::_Stop_state::_M_try_lock)
5873         (stop_token::_Stop_state::_M_try_lock_and_stop)
5874         (stop_token::_Stop_state::_M_do_try_lock): New member functions for
5875         managing spinlock.
5876         (stop_token::_Stop_state::_M_request_stop): Use atomic operations to
5877         read and update state. Release lock while running callbacks. Use new
5878         data members to synchronize with callback destruction.
5879         (stop_token::_Stop_state::_M_remove_callback): Likewise.
5880         (stop_token::_Stop_state::_M_register_callback): Use atomic operations
5881         to read and update state.
5882         (stop_token::_Stop_state_ref): Handle type to manage _Stop_state,
5883         replacing shared_ptr.
5884         (stop_source::stop_source(const stop_source&)): Update reference count.
5885         (stop_source::operator=(const stop_source&)): Likewise.
5886         (stop_source::~stop_source()): Likewise.
5887         (stop_source::stop_source(stop_source&&)): Define as defaulted.
5888         (stop_source::operator=(stop_source&&)): Establish postcondition on
5889         parameter.
5890         (stop_callback): Enforce preconditions on template parameter. Replace
5891         base class with data member of new _Cb_impl type.
5892         (stop_callback::stop_callback(const stop_token&, Cb&&))
5893         (stop_callback::stop_callback(stop_token&&, Cb&&)): Fix TOCTTOU race.
5894         (stop_callback::_Cb_impl): New type wrapping _Callback member and
5895         defining the _S_execute member function.
5896         * testsuite/30_threads/stop_token/stop_callback/deadlock-mt.cc: New
5897         test.
5898         * testsuite/30_threads/stop_token/stop_callback/deadlock.cc: New test.
5899         * testsuite/30_threads/stop_token/stop_callback/destroy.cc: New test.
5900         * testsuite/30_threads/stop_token/stop_callback/destructible_neg.cc:
5901         New test.
5902         * testsuite/30_threads/stop_token/stop_callback/invocable_neg.cc: New
5903         test.
5904         * testsuite/30_threads/stop_token/stop_callback/invoke.cc: New test.
5905         * testsuite/30_threads/stop_token/stop_source/assign.cc: New test.
5906         * testsuite/30_threads/stop_token/stop_token/stop_possible.cc: New
5907         test.
5908
5909         * libsupc++/compare (__detail::__3way_builtin_ptr_cmp): Use
5910         three_way_comparable_with.
5911         (__detail::__3way_cmp_with): Remove workaround for fixed bug.
5912         (compare_three_way::operator()): Remove redundant constraint from
5913         requires-clause.
5914         (__detail::_Synth3way::operator()): Use three_way_comparable_with
5915         instead of workaround.
5916         * testsuite/18_support/comparisons/object/93479.cc: Prune extra
5917         output due to simplified constraints on compare_three_way::operator().
5918
5919         PR libstdc++/93479
5920         * libsupc++/compare (__3way_builtin_ptr_cmp): Require <=> to be valid.
5921         * testsuite/18_support/comparisons/object/93479.cc: New test.
5922
5923         * testsuite/std/ranges/access/end.cc: Do not assume test_range::end()
5924         returns the same type as test_range::begin(). Add comments.
5925         * testsuite/std/ranges/access/rbegin.cc: Likewise.
5926         * testsuite/std/ranges/access/rend.cc: Likewise.
5927         * testsuite/std/ranges/range.cc: Do not assume the sentinel for
5928         test_range is the same as its iterator type.
5929         * testsuite/util/testsuite_iterators.h (test_range::sentinel): Add
5930         operator- overloads to satisfy sized_sentinel_for when the iterator
5931         satisfies random_access_iterator.
5932
5933 2020-01-28  Jonathan Wakely  <jwakely@redhat.com>
5934
5935         PR libstdc++/93470
5936         * include/bits/refwrap.h (reference_wrapper::operator()): Restrict
5937         static assertion to object types.
5938
5939         PR libstdc++/93325
5940         * acinclude.m4 (GLIBCXX_ENABLE_LIBSTDCXX_TIME): Use AC_SEARCH_LIBS for
5941         clock_gettime instead of explicit glibc version check.
5942         * configure: Regenerate.
5943
5944 2020-01-28  Martin Liska  <mliska@suse.cz>
5945
5946         PR libstdc++/93478
5947         * include/std/atomic: Fix typo.
5948         * include/std/optional: Likewise.
5949
5950 2020-01-27  Andrew Burgess  <andrew.burgess@embecosm.com>
5951
5952         * configure: Regenerate.
5953
5954 2020-01-27  Jonathan Wakely  <jwakely@redhat.com>
5955
5956         PR libstdc++/93426
5957         * include/std/span (span): Fix deduction guide.
5958         * testsuite/23_containers/span/deduction.cc: New test.
5959
5960 2020-01-24  Jonathan Wakely  <jwakely@redhat.com>
5961
5962         * libsupc++/compare (__cmp_cat::_Eq): Remove enumeration type.
5963         (__cmp_cat::_Ord::equivalent): Add enumerator.
5964         (__cmp_cat::_Ord::_Less, __cmp_cat::_Ord::_Greater): Rename to less
5965         and greater.
5966         (partial_ordering, weak_ordering, strong_ordering): Remove
5967         constructors taking __cmp_cat::_Eq parameters. Use renamed
5968         enumerators.
5969
5970 2020-01-24  Maciej W. Rozycki  <macro@wdc.com>
5971
5972         * acinclude.m4: Handle `--with-toolexeclibdir='.
5973         * Makefile.in: Regenerate.
5974         * aclocal.m4: Regenerate.
5975         * configure: Regenerate.
5976         * doc/Makefile.in: Regenerate.
5977         * include/Makefile.in: Regenerate.
5978         * libsupc++/Makefile.in: Regenerate.
5979         * po/Makefile.in: Regenerate.
5980         * python/Makefile.in: Regenerate.
5981         * src/Makefile.in: Regenerate.
5982         * src/c++11/Makefile.in: Regenerate.
5983         * src/c++17/Makefile.in: Regenerate.
5984         * src/c++98/Makefile.in: Regenerate.
5985         * src/filesystem/Makefile.in: Regenerate.
5986         * testsuite/Makefile.in: Regenerate.
5987
5988 2020-01-23  Alexandre Oliva <oliva@adacore.com>
5989
5990         * crossconfig.m4 (GLIBCXX_CHECK_MATH_DECL): Reject macros.
5991         * configure: Rebuild.
5992
5993         * testsuite/27_io/fpos/mbstate_t/1.cc: Zero-init mbstate_t.
5994
5995 2020-01-23  Jonathan Wakely  <jwakely@redhat.com>
5996
5997         PR libstdc++/91947
5998         * include/Makefile.am (${host_builddir}/largefile-config.h): Simplify
5999         rule.
6000         * include/Makefile.in: Regenerate.
6001
6002 2020-01-20  Jonathan Wakely  <jwakely@redhat.com>
6003
6004         * doc/xml/faq.xml: Fix grammar.
6005         * doc/xml/manual/appendix_contributing.xml: Improve instructions.
6006         * doc/xml/manual/spine.xml: Update copyright years.
6007         * doc/html/*: Regenerate.
6008
6009 2020-01-19  Eric S. Raymond <esr@thyrsus.com>
6010
6011         * doc/xml/faq.xml: Update for SVN -> Git transition.
6012         * doc/xml/manual/appendix_contributing.xml: Likewise.
6013         * doc/xml/manual/status_cxx1998.xml: Likewise.
6014         * doc/xml/manual/status_cxx2011.xml: Likewise.
6015         * doc/xml/manual/status_cxx2014.xml: Likewise.
6016         * doc/xml/manual/status_cxx2017.xml: Likewise.
6017         * doc/xml/manual/status_cxx2020.xml: Likewise.
6018         * doc/xml/manual/status_cxxtr1.xml: Likewise.
6019         * doc/xml/manual/status_cxxtr24733.xml: Likewise.
6020
6021 2020-01-18  Iain Sandoe  <iain@sandoe.co.uk>
6022
6023         * include/Makefile.am: Add coroutine to the std set.
6024         * include/Makefile.in: Regenerated.
6025         * include/std/coroutine: New file.
6026
6027 2020-01-17  Jonathan Wakely  <jwakely@redhat.com>
6028
6029         PR libstdc++/92376
6030         * include/bits/c++config: Only do PSTL config when the header is
6031         present, to fix freestanding.
6032         * libsupc++/new_opa.cc [!_GLIBCXX_HOSTED]: Declare allocation
6033         functions if they were detected by configure.
6034
6035 2020-01-16  Kai-Uwe Eckhardt  <kuehro@gmx.de>
6036             Matthew Bauer  <mjbauer95@gmail.com>
6037             Jonathan Wakely  <jwakely@redhat.com>
6038
6039         PR bootstrap/64271 (partial)
6040         * config/os/bsd/netbsd/ctype_base.h (ctype_base::mask): Change type
6041         to unsigned short.
6042         (ctype_base::alpha, ctype_base::digit, ctype_base::xdigit)
6043         (ctype_base::print, ctype_base::graph, ctype_base::alnum): Sync
6044         definitions with NetBSD upstream.
6045         (ctype_base::blank): Use _CTYPE_BL.
6046         * config/os/bsd/netbsd/ctype_configure_char.cc (_C_ctype_): Remove
6047         Declaration.
6048         (ctype<char>::classic_table): Use _C_ctype_tab_ instead of _C_ctype_.
6049         (ctype<char>::do_toupper, ctype<char>::do_tolower): Cast char
6050         parameters to unsigned char.
6051         * config/os/bsd/netbsd/ctype_inline.h (ctype<char>::is): Likewise.
6052
6053 2020-01-16  François Dumont  <fdumont@gcc.gnu.org>
6054
6055         PR libstdc++/91263
6056         * include/bits/hashtable.h (_Hashtable<>): Make _Equality<> friend.
6057         * include/bits/hashtable_policy.h: Include <bits/stl_algo.h>.
6058         (_Equality_base): Remove.
6059         (_Equality<>::_M_equal): Review implementation. Use
6060         std::is_permutation.
6061         * testsuite/23_containers/unordered_multiset/operators/1.cc
6062         (Hash, Equal, test02, test03): New.
6063         * testsuite/23_containers/unordered_set/operators/1.cc
6064         (Hash, Equal, test02, test03): New.
6065
6066 2020-01-15  Jonathan Wakely  <jwakely@redhat.com>
6067
6068         PR libstdc++/93267
6069         * include/bits/iterator_concepts.h (__max_diff_type, __max_size_type):
6070         Move here from <bits/range_access.h> and define using __int128 when
6071         available.
6072         (__is_integer_like, __is_signed_integer_like): Move here from
6073         <bits/range_access.h>.
6074         (weakly_incrementable): Use __is_signed_integer_like.
6075         * include/bits/range_access.h (__max_diff_type, __max_size_type)
6076         (__is_integer_like, __is_signed_integer_like): Move to
6077         <bits/iterator_concepts.h>.
6078         (__make_unsigned_like_t): Move here from <ranges>.
6079         * include/std/ranges (__make_unsigned_like_t): Move to
6080         <bits/range_access.h>.
6081         (iota_view): Replace using-directive with using-declarations.
6082         * testsuite/std/ranges/iota/93267.cc: New test.
6083         * testsuite/std/ranges/iota_view.cc: Move to new 'iota' sub-directory.
6084
6085 2020-01-13  Jonathan Wakely  <jwakely@redhat.com>
6086
6087         PR libstdc++/93244
6088         * include/bits/fs_path.h (path::generic_string<C,A>)
6089         [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Convert root-dir to forward-slash.
6090         * testsuite/27_io/filesystem/path/generic/generic_string.cc: Check
6091         root-dir is converted to forward slash in generic pathname.
6092         * testsuite/27_io/filesystem/path/generic/utf.cc: New test.
6093         * testsuite/27_io/filesystem/path/generic/wchar_t.cc: New test.
6094
6095         PR libstdc++/58605
6096         * include/bits/atomic_base.h (__cpp_lib_atomic_value_initialization):
6097         Define.
6098         (__atomic_flag_base, __atomic_base, __atomic_base<_PTp*>)
6099         (__atomic_float): Add default member initializer for C++20.
6100         * include/std/atomic (atomic): Likewise.
6101         (atomic::atomic()): Remove noexcept-specifier on default constructor.
6102         * include/std/version (__cpp_lib_atomic_value_initialization): Define.
6103         * testsuite/29_atomics/atomic/cons/assign_neg.cc: Adjust dg-error line
6104         number.
6105         * testsuite/29_atomics/atomic/cons/copy_neg.cc: Likewise.
6106         * testsuite/29_atomics/atomic/cons/value_init.cc: New test.
6107         * testsuite/29_atomics/atomic_flag/cons/value_init.cc: New test.
6108         * testsuite/29_atomics/atomic_flag/requirements/trivial.cc: Adjust
6109         expected result for is_trivially_default_constructible.
6110         * testsuite/29_atomics/atomic_float/requirements.cc: Likewise.
6111         * testsuite/29_atomics/atomic_float/value_init.cc: New test.
6112         * testsuite/29_atomics/atomic_integral/cons/assign_neg.cc: Likewise.
6113         * testsuite/29_atomics/atomic_integral/cons/copy_neg.cc: Likewise.
6114         * testsuite/29_atomics/atomic_integral/cons/value_init.cc
6115         * testsuite/29_atomics/atomic_integral/requirements/trivial.cc: Adjust
6116         expected results for is_trivially_default_constructible.
6117         * testsuite/util/testsuite_common_types.h (has_trivial_dtor): Add
6118         new test generator.
6119
6120 2020-01-10  Jonathan Wakely  <jwakely@redhat.com>
6121
6122         * testsuite/util/testsuite_iterators.h: Improve comment.
6123
6124         * testsuite/25_algorithms/equal/deque_iterators/1.cc: Don't use C++11
6125         initialization syntax.
6126
6127         PR libstdc++/92285
6128         * include/bits/streambuf_iterator.h (istreambuf_iterator): Make type
6129         of base class independent of __cplusplus value.
6130         [__cplusplus < 201103L] (istreambuf_iterator::reference): Override the
6131         type defined in the base class
6132         * testsuite/24_iterators/istreambuf_iterator/92285.cc: New test.
6133         * testsuite/24_iterators/istreambuf_iterator/requirements/
6134         base_classes.cc: Adjust expected base class for C++98.
6135
6136 2020-01-09  Olivier Hainque  <hainque@adacore.com>
6137
6138         * doc/xml/manual/appendix_contributing.xml: Document _C2
6139         as a reserved identifier, by VxWorks.
6140         * include/bits/stl_map.h: Rename _C2 template typenames as _Cmp2.
6141         * include/bits/stl_multimap.h: Likewise.
6142
6143 2020-01-09  Jonathan Wakely  <jwakely@redhat.com>
6144
6145         * include/ext/extptr_allocator.h (_ExtPtr_allocator::operator==)
6146         (_ExtPtr_allocator::operator!=): Add missing const qualifiers.
6147         * include/ext/pointer.h (readable_traits<_Pointer_adapter<S>>): Add
6148         partial specialization to disambiguate the two constrained
6149         specializations.
6150
6151         * include/experimental/type_traits (experimental::is_pod_v): Disable
6152         -Wdeprecated-declarations warnings around reference to std::is_pod.
6153         * include/std/type_traits (is_pod_v): Likewise.
6154         * testsuite/18_support/max_align_t/requirements/2.cc: Also check
6155         is_standard_layout and is_trivial. Do not check is_pod for C++20.
6156         * testsuite/20_util/is_pod/requirements/explicit_instantiation.cc:
6157         Add -Wno-deprecated for C++20.
6158         * testsuite/20_util/is_pod/requirements/typedefs.cc: Likewise.
6159         * testsuite/20_util/is_pod/value.cc: Likewise.
6160         * testsuite/experimental/type_traits/value.cc: Likewise.
6161
6162 2020-01-09  JeanHeyd "ThePhD" Meneide  <phdofthehouse@gmail.com>
6163
6164         * include/bits/c++config (_GLIBCXX20_DEPRECATED): Add new macro.
6165         * include/std/type_traits (is_pod, is_pod_v): Deprecate for C++20.
6166         * testuite/20_util/is_pod/deprecated-2a.cc: New test.
6167
6168 2020-01-09  Jonathan Wakely  <jwakely@redhat.com>
6169
6170         PR libstdc++/93205
6171         * include/bits/random.h (operator>>): Check stream operation succeeds.
6172         * include/bits/random.tcc (operator<<): Remove redundant __ostream_type
6173         typedefs.
6174         (operator>>): Remove redundant __istream_type typedefs. Check stream
6175         operations succeed.
6176         (__extract_params): New function to fill a vector from a stream.
6177         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error line.
6178
6179         PR libstdc++/93208
6180         * config/abi/pre/gnu.ver: Add new exports.
6181         * include/std/memory_resource (memory_resource::~memory_resource()):
6182         Do not define inline.
6183         (monotonic_buffer_resource::~monotonic_buffer_resource()): Likewise.
6184         * src/c++17/memory_resource.cc (memory_resource::~memory_resource()):
6185         Define.
6186         (monotonic_buffer_resource::~monotonic_buffer_resource()): Define.
6187         * testsuite/20_util/monotonic_buffer_resource/93208.cc: New test.
6188
6189 2020-01-09  François Dumont  <fdumont@gcc.gnu.org>
6190
6191         PR libstdc++/92124
6192         * include/bits/hashtable.h (_Hashtable<>::__alloc_node_gen_t): New
6193         template alias.
6194         (_Hashtable<>::__fwd_value_for): New.
6195         (_Hashtable<>::_M_assign_elements<>): Remove _NodeGenerator template
6196         parameter.
6197         (_Hashtable<>::_M_assign<>): Add _Ht template parameter.
6198         (_Hashtable<>::operator=(const _Hashtable<>&)): Adapt.
6199         (_Hashtable<>::_M_move_assign): Adapt. Replace std::move_if_noexcept
6200         with std::move.
6201         (_Hashtable<>::_Hashtable(const _Hashtable&)): Adapt.
6202         (_Hashtable<>::_Hashtable(const _Hashtable&, const allocator_type&)):
6203         Adapt.
6204         (_Hashtable<>::_Hashtable(_Hashtable&&, const allocator_type&)):
6205         Adapt.
6206         * testsuite/23_containers/unordered_set/92124.cc: New.
6207
6208 2020-01-08  Jonathan Wakely  <jwakely@redhat.com>
6209
6210         PR libstdc++/93201
6211         * src/c++17/fs_ops.cc (do_remove_all): New function implementing more
6212         detailed error reporting for remove_all. Check result of recursive
6213         call before incrementing iterator.
6214         (remove_all(const path&), remove_all(const path&, error_code&)): Use
6215         do_remove_all.
6216         * src/filesystem/ops.cc (remove_all(const path&, error_code&)): Check
6217         result of recursive call before incrementing iterator.
6218         * testsuite/27_io/filesystem/operations/remove_all.cc: Check errors
6219         are reported correctly.
6220         * testsuite/experimental/filesystem/operations/remove_all.cc: Likewise.
6221
6222 2020-01-07  Thomas Rodgers  <trodgers@redhat.com>
6223
6224         * include/std/condition_variable
6225         (condition_variable_any::wait_on): Rename to match current draft
6226         standard.
6227         (condition_variable_any::wait_on_until): Likewise.
6228         (condition_variable_any::wait_on_for): Likewise.
6229         * testsuite/30_threads/condition_variable_any/stop_token/wait_on.cc:
6230         Adjust tests to account for renamed methods.
6231
6232 2020-01-07  François Dumont  <fdumont@gcc.gnu.org>
6233
6234         PR libstdc++/92124
6235         * include/bits/stl_tree.h
6236         (_Rb_tree<>::_M_move_assign(_Rb_tree&, false_type)): Replace
6237         std::move_if_noexcept by std::move.
6238         * testsuite/23_containers/map/92124.cc: New.
6239         * testsuite/23_containers/set/92124.cc: New.
6240
6241 2020-01-06  Jonathan Wakely  <jwakely@redhat.com>
6242
6243         * include/std/stop_token (stop_token): Remove operator!= (LWG 3254).
6244         (stop_source): Likewise (LWG 3362).
6245         * testsuite/30_threads/stop_token/stop_source.cc: Test equality
6246         comparisons.
6247
6248         * include/bits/stl_algobase.h (__is_byte_iter, __min_cmp)
6249         (lexicographical_compare_three_way): Do not depend on
6250         __cpp_lib_concepts.
6251         * include/std/version (__cpp_lib_three_way_comparison): Only define
6252         when __cpp_lib_concepts is defined.
6253         * libsupc++/compare (__cpp_lib_three_way_comparison): Likewise.
6254
6255 2020-01-03  Jonathan Wakely  <jwakely@redhat.com>
6256
6257         * include/bits/stl_algobase.h (lexicographical_compare_three_way):
6258         Only define four-argument overload when __cpp_lib_concepts is defined.
6259
6260 2020-01-01  John David Anglin  <danglin@gcc.gnu.org>
6261
6262         * config/abi/post/hppa-linux-gnu/baseline_symbols.txt: Update.
6263
6264 2020-01-01  Jakub Jelinek  <jakub@redhat.com>
6265
6266         Update copyright years.
6267 \f
6268 Copyright (C) 2020 Free Software Foundation, Inc.
6269
6270 Copying and distribution of this file, with or without modification,
6271 are permitted in any medium without royalty provided the copyright
6272 notice and this notice are preserved.