libstdc++-v3/ChangeLog

   1 2019-11-24  François Dumont  <fdumont@gcc.gnu.org>
   2
   3         * include/debug/functions.h: Remove <bits/move.h> include.
   4         (__check_singular_aux, __check_singular): Move...
   5         * include/debug/helper_functions.h:
   6         (__check_singular_aux, __check_singular): ...here.
   7         (__valid_range_aux): Adapt to use latter.
   8         * testsuite/25_algorithms/copy/debug/2_neg.cc: New.
   9
  10 2019-11-20  Janne Blomqvist  <jb@gcc.gnu.org>
  11
  12         * doc/html/api.html: Use https for gcc.gnu.org.
  13         * doc/xml/api.xml: Likewise.
  14
  15 2019-11-19  Jonathan Wakely  <jwakely@redhat.com>
  16
  17         * include/bits/regex.h (ranges::__detail::__enable_view_impl): Fix
  18         declaration.
  19         * include/bits/stl_multiset.h (ranges::__detail::__enable_view_impl):
  20         Likewise.
  21         * include/bits/stl_set.h (ranges::__detail::__enable_view_impl):
  22         Likewise.
  23         * include/bits/unordered_set.h (ranges::__detail::__enable_view_impl):
  24         Likewise.
  25         * include/debug/multiset.h (ranges::__detail::__enable_view_impl):
  26         Likewise.
  27         * include/debug/set.h (ranges::__detail::__enable_view_impl): Likewise.
  28         * include/debug/unordered_set (ranges::__detail::__enable_view_impl):
  29         Likewise.
  30
  31 2019-11-18  Jonathan Wakely  <jwakely@redhat.com>
  32
  33         * include/std/thread: Reduce header dependencies.
  34         (jthread::get_id()): Add missing return.
  35         (jthread::get_stop_token()): Avoid unnecessary stop_source temporary.
  36         (jthread::_S_create): Check is_invocable using decayed types. Add
  37         static assertion.
  38         * testsuite/30_threads/jthread/1.cc: Add dg-require-gthreads.
  39         * testsuite/30_threads/jthread/2.cc: Likewise.
  40         * testsuite/30_threads/jthread/3.cc: New test.
  41         * testsuite/30_threads/jthread/jthread.cc: Add missing directives for
  42         pthread and gthread support. Use VERIFY instead of assert.
  43
  44         * include/bits/alloc_traits.h (allocator_traits::construct)
  45         (allocator_traits::destroy, allocator_traits::max_size): Add unused
  46         attributes to parameters that are not used in C++20.
  47         * include/std/bit (__ceil2): Add braces around assertion to avoid
  48         -Wmissing-braces warning.
  49
  50 2019-11-16  Edward Smith-Rowland  <3dw4rd@verizon.net>
  51
  52         Repair the <tuple> part of C++20 p1032 Misc constexpr bits.
  53         * include/bits/uses_allocator.h (__uses_alloc0::_Sink::operaror=)
  54         (__use_alloc(const _Alloc&)) : Constexpr.
  55
  56 2019-11-17  Jonathan Wakely  <jwakely@redhat.com>
  57
  58         * include/std/string_view (basic_string_view(It, End)): Add range
  59         constructor and deduction guide from P1391R4.
  60         * testsuite/21_strings/basic_string_view/cons/char/range.cc: New test.
  61
  62         * include/bits/regex.h (match_results): Specialize __enable_view_impl.
  63         * include/bits/stl_set.h (set): Likewise.
  64         * include/bits/unordered_set.h (unordered_set, unordered_multiset):
  65         Likewise.
  66         * include/debug/multiset.h (__debug::multiset): Likewise.
  67         * include/debug/set.h (__debug::set): Likewise.
  68         * include/debug/unordered_set (__debug::unordered_set)
  69         (__debug::unordered_multiset): Likewise.
  70         * include/std/ranges (ranges::view, ranges::enable_view)
  71         (ranges::view_interface, ranges::subrange, ranges::empty_view)
  72         (ranges::single_view, ranges::views::single, ranges::iota_view)
  73         (ranges::views::iota): Define for C++20.
  74         * testsuite/std/ranges/empty_view.cc: New test.
  75         * testsuite/std/ranges/iota_view.cc: New test.
  76         * testsuite/std/ranges/single_view.cc: New test.
  77         * testsuite/std/ranges/view.cc: New test.
  78
  79 2019-11-16  Jonathan Wakely  <jwakely@redhat.com>
  80
  81         * include/std/ranges: Revert accidentally committed changes.
  82
  83         * include/std/thread (jthread::jthread()): Use nostopstate constant.
  84         (jthread::jthread(Callable&&, Args&&...)): Use helper function to
  85         create std::thread instead of indirection through a lambda. Use
  86         remove_cvref_t instead of decay_t.
  87         (jthread::joinable(), jthread::get_id(), jthread::native_handle())
  88         (jthread::hardware_concurrency()): Add nodiscard attribute.
  89         (swap(jthread&. jthread&)): Define hidden friend.
  90         (jthread::_S_create): New helper function for constructor.
  91
  92 2019-11-15  Edward Smith-Rowland  <3dw4rd@verizon.net>
  93
  94         Implement the <tuple> part of C++20 p1032 Misc constexpr bits.
  95         * include/std/tuple (_Head_base, _Tuple_impl(allocator_arg_t,...)
  96         (_M_assign, tuple(allocator_arg_t,...), _Inherited, operator=, _M_swap)
  97         (swap, pair(piecewise_construct_t,): Constexpr.
  98         * (__uses_alloc0::_Sink::operator=, __uses_alloc_t): Constexpr.
  99         * testsuite/20_util/tuple/cons/constexpr_allocator_arg_t.cc: New test.
 100         * testsuite/20_util/tuple/constexpr_swap.cc : New test.
 101         * testsuite/20_util/uses_allocator/69293_neg.cc: Extra error for C++20.
 102         * testsuite/20_util/uses_allocator/cons_neg.cc: : Extra error for C++20.
 103
 104 2019-11-15  Jonathan Wakely  <jwakely@redhat.com>
 105
 106         * include/std/stop_token: Reduce header dependencies by including
 107         internal headers.
 108         (stop_token::swap(stop_token&), swap(stop_token&, stop_token&)):
 109         Define.
 110         (operator!=(const stop_token&, const stop_token&)): Fix return value.
 111         (stop_token::_Stop_cb::_Stop_cb(Cb&&)): Use std::forward instead of
 112         (stop_token::_Stop_state_t) [_GLIBCXX_HAS_GTHREADS]: Use lock_guard
 113         instead of unique_lock.
 114         [!_GLIBCXX_HAS_GTHREADS]: Do not use mutex.
 115         (stop_token::stop_token(_Stop_state)): Change parameter to lvalue
 116         reference.
 117         (stop_source): Remove unnecessary using-declarations for names only
 118         used once.
 119         (swap(stop_source&, stop_source&)): Define.
 120         (stop_callback(const stop_token&, _Cb&&))
 121         (stop_callback(stop_token&&, _Cb&&)): Replace lambdas with a named
 122         function. Use std::forward instead of std::move. Run callbacks if a
 123         stop request has already been made.
 124         (stop_source::_M_execute()): Remove.
 125         (stop_source::_S_execute(_Stop_cb*)): Define.
 126         * include/std/version (__cpp_lib_jthread): Define conditionally.
 127         * testsuite/30_threads/stop_token/stop_callback.cc: New test.
 128         * testsuite/30_threads/stop_token/stop_source.cc: New test.
 129         * testsuite/30_threads/stop_token/stop_token.cc: Enable test for
 130         immediate execution of callback.
 131
 132 2019-11-15  Edward Smith-Rowland  <3dw4rd@verizon.net>
 133
 134         Implement the default_searcher part of C++20 p1032 Misc constexpr bits.
 135         * include/std/functional
 136         (default_searcher, default_searcher::operator()): Constexpr.
 137         * testsuite/20_util/function_objects/constexpr_searcher.cc: New.
 138
 139 2019-11-15  Jonathan Wakely  <jwakely@redhat.com>
 140
 141         * include/bits/iterator_concepts.h (weakly_incrementable): Adjust.
 142         * include/std/concepts (default_constructible): Rename to
 143         default_initializable and require default-list-initialization and
 144         default-initialization to be valid (LWG 3149).
 145         (semiregular): Adjust to new name.
 146         * testsuite/std/concepts/concepts.lang/concept.defaultconstructible/
 147         1.cc: Rename directory to concept.defaultinitializable and adjust to
 148         new name.
 149         * testsuite/std/concepts/concepts.lang/concept.defaultinitializable/
 150         lwg3149.cc: New test.
 151         * testsuite/util/testsuite_iterators.h (test_range): Adjust.
 152
 153         * src/c++17/fs_path.cc [_GLIBCXX_FILESYSTEM_IS_WINDOWS]
 154         (is_disk_designator): New helper function.
 155         (path::_Parser::root_path()): Use is_disk_designator.
 156         (path::lexically_relative(const path&)): Implement resolution of
 157         LWG 3070.
 158         * testsuite/27_io/filesystem/path/generation/relative.cc: Check with
 159         path components that look like a root-name.
 160
 161         * doc/doxygen/user.cfg.in: Add <stop_token>.
 162         * include/precompiled/stdc++.h: Likewise.
 163         * include/std/stop_token: Fix definition of std::nostopstate.
 164         * testsuite/30_threads/headers/stop_token/synopsis.cc: New test.
 165         * testsuite/30_threads/headers/thread/types_std_c++20.cc: New test.
 166         * testsuite/30_threads/stop_token/stop_source.cc: New test.
 167         * testsuite/30_threads/stop_token/stop_token.cc: Remove unnecessary
 168         dg-require directives. Remove I/O and inclusion of <iostream>.
 169
 170 2019-11-14  Thomas Rodgers  <trodgers@redhat.com>
 171
 172         * include/Makefile.am: Add <stop_token> header.
 173         * include/Makefile.in: Regenerate.
 174         * include/std/condition_variable: Add overloads for stop_token support
 175         to condition_variable_any.
 176         * include/std/stop_token: New file.
 177         * include/std/thread: Add jthread type.
 178         * include/std/version (__cpp_lib_jthread): New value.
 179         * testsuite/30_threads/condition_variable_any/stop_token/1.cc: New test.
 180         * testsuite/30_threads/condition_variable_any/stop_token/2.cc: New test.
 181         * testsuite/30_threads/condition_variable_any/stop_token/wait_on.cc:
 182         New test.
 183         * testsuite/30_threads/jthread/1.cc: New test.
 184         * testsuite/30_threads/jthread/2.cc: New test.
 185         * testsuite/30_threads/jthread/jthread.cc: New test.
 186         * testsuite/30_threads/stop_token/1.cc: New test.
 187         * testsuite/30_threads/stop_token/2.cc: New test.
 188         * testsuite/30_threads/stop_token/stop_token.cc: New test.
 189
 190 2019-11-14  Edward Smith-Rowland  <3dw4rd@verizon.net>
 191
 192         Implement the <array> part of C++20 p1032 Misc constexpr bits.
 193         * include/std/array (fill, swap): Make constexpr.
 194         * testsuite/23_containers/array/requirements/constexpr_fill.cc: New.
 195         * testsuite/23_containers/array/requirements/constexpr_swap.cc: New.
 196
 197 2019-11-14  Jonathan Wakely  <jwakely@redhat.com>
 198
 199         * include/bits/iterator_concepts.h (__iter_concept_impl): Add
 200         comments.
 201         (indirect_relation): Rename to indirect_binary_predicate and adjust
 202         definition as per P1716R3.
 203         (indirect_equivalence_relation): Define.
 204         (indirectly_comparable): Adjust definition.
 205         * include/std/concepts (equivalence_relation): Define.
 206         * testsuite/std/concepts/concepts.callable/relation.cc: Add tests for
 207         equivalence_relation.
 208
 209         * include/bits/iterator_concepts.h (disable_sized_sentinel): Rename to
 210         disable_sized_sentinel_for.
 211         * testsuite/24_iterators/headers/iterator/synopsis_c++20.cc: Adjust.
 212
 213 2019-11-13  Jonathan Wakely  <jwakely@redhat.com>
 214
 215         * libsupc++/compare (strong_order, weak_order, partial_order)
 216         (compare_strong_order_fallback, compare_weak_order_fallback)
 217         (compare_partial_order_fallback): Define customization point objects
 218         for C++20.
 219         * testsuite/18_support/comparisons/algorithms/partial_order.cc: New
 220         test.
 221         * testsuite/18_support/comparisons/algorithms/strong_order.cc: New
 222         test.
 223         * testsuite/18_support/comparisons/algorithms/weak_order.cc: New test.
 224
 225 2019-11-11  Gerald Pfeifer  <gerald@pfeifer.com>
 226
 227         * doc/xml/gnu/gpl-3.0.xml: Adjust link to "Why not LGPL".
 228
 229 2019-11-10  Gerald Pfeifer  <gerald@pfeifer.com>
 230
 231         * doc/xml/manual/using.xml: Switch www.hboehm.info to https.
 232
 233 2019-11-07  Jonathan Wakely  <jwakely@redhat.com>
 234
 235         * doc/doxygen/user.cfg.in (INPUT): Add <compare> header.
 236         * include/precompiled/stdc++.h: Include <compare> header.
 237
 238         * libsupc++/compare (common_comparison_category)
 239         (common_comparison_category_t): Define for C++20.
 240         * testsuite/18_support/comparisons/common/1.cc: New test.
 241
 242         * include/bits/stl_algo.h (for_each_n): Handle negative count.
 243         * testsuite/25_algorithms/for_each/for_each_n_debug.cc: New test.
 244
 245 2019-11-07  Jason Merrill  <jason@redhat.com>
 246
 247         * libsupc++/compare: Remove strong_equality and weak_equality.
 248
 249 2019-11-06  Jonathan Wakely  <jwakely@redhat.com>
 250
 251         * include/Makefile.in: Regenerate.
 252         * libsupc++/Makefile.in: Regenerate.
 253         * libsupc++/compare (__3way_builtin_ptr_cmp): Define helper.
 254         (compare_three_way): Add missing implementation.
 255
 256         * include/bits/iterator_concepts.h (unreachable_sentinel_t): Remove
 257         redundant equality operators.
 258         * testsuite/util/testsuite_iterators.h (test_range::sentinel):
 259         Likewise.
 260
 261 2019-11-05  Jonathan Wakely  <jwakely@redhat.com>
 262
 263         * libsupc++/compare: New header.
 264         * libsupc++/Makefile.am (std_HEADERS): Add compare.
 265         * include/std/version: Define __cpp_lib_three_way_comparison.
 266         * include/std/functional: #include <compare>.
 267
 268         * include/std/version [!_GLIBCXX_HOSTED]: Do not define feature test
 269         macros for features that are only present in hosted builds.
 270
 271         * include/bits/iterator_concepts.h (__iter_without_nested_types):
 272         Remove incorrect comment.
 273
 274 2019-10-31  Jonathan Wakely  <jwakely@redhat.com>
 275
 276         * doc/html/*: Regenerate.
 277
 278         * include/bits/refwrap.h (reference_wrapper, ref, cref): Add constexpr
 279         specifiers for C++20.
 280         * include/std/functional (_Mem_fn, mem_fn, _Bind, _Bind_result, bind)
 281         (bind_front, _Not_fn, not_fn): Likewise.
 282         * testsuite/20_util/bind/constexpr.cc: New test.
 283         * testsuite/20_util/function_objects/bind_front/constexpr.cc: New test.
 284         * testsuite/20_util/function_objects/mem_fn/constexpr.cc: New test.
 285         * testsuite/20_util/function_objects/not_fn/constexpr.cc: New test.
 286         * testsuite/20_util/reference_wrapper/constexpr.cc: New test.
 287
 288         * doc/doxygen/user.cfg.in: Add new header.
 289         * include/Makefile.am: Add new header.
 290         * include/Makefile.in: Regenerate.
 291         * include/precompiled/stdc++.h: Include new header.
 292         * include/std/ranges: New header.
 293         (ranges::sentinel_t, ranges::range_value_t, ranges::range_reference_t)
 294         (ranges::range_rvalue_reference_t, ranges::sized_range)
 295         (ranges::output_range, ranges::input_ranges, ranges::forward_range)
 296         (ranges::bidirectional_range, ranges::random_access_range)
 297         (ranges::contiguous_range, ranges::common::range): Define.
 298         * testsuite/24_iterators/headers/iterator/synopsis_c++20.cc: Check
 299         that disabled_sized_sentinel can be specialized.
 300         * testsuite/std/ranges/access/begin.cc: Include <ranges> instead of
 301         <iterator>.
 302         * testsuite/std/ranges/access/cbegin.cc: Likewise.
 303         * testsuite/std/ranges/access/cdata.cc: Likewise.
 304         * testsuite/std/ranges/access/cend.cc: Likewise.
 305         * testsuite/std/ranges/access/crbegin.cc: Likewise.
 306         * testsuite/std/ranges/access/crend.cc: Likewise.
 307         * testsuite/std/ranges/access/data.cc: Likewise.
 308         * testsuite/std/ranges/access/empty.cc: Likewise.
 309         * testsuite/std/ranges/access/end.cc: Likewise.
 310         * testsuite/std/ranges/access/end_neg.cc: Likewise.
 311         * testsuite/std/ranges/access/rbegin.cc: Likewise.
 312         * testsuite/std/ranges/access/rend.cc: Likewise.
 313         * testsuite/std/ranges/access/size.cc: Likewise.
 314         * testsuite/std/ranges/access/size_neg.cc: Likewise.
 315         * testsuite/std/ranges/headers/ranges/synopsis.cc: New test.
 316         * testsuite/std/ranges/range.cc: New test.
 317         * testsuite/std/ranges/refinements.cc: New test.
 318         * testsuite/std/ranges/sized.cc: New test.
 319         * testsuite/util/testsuite_iterators.h: Add aliases for range types.
 320         (output_iterator_wrapper::WritableObject::operator=): Add const
 321         qualifier so that output_iterator_wrapper satisfies writable.
 322
 323         * testsuite/20_util/add_pointer/value.cc: Check void types.
 324
 325         * include/bits/range_access.h (__sizable): Rename to __sentinel_size.
 326         Remove workaround for PR c++/92268 and remove redundant requirements
 327         that are already checked by sized_sentinel_for.
 328         * testsuite/std/ranges/access/cend.cc: Fix failures.
 329         * testsuite/std/ranges/access/end.cc: Likewise.
 330
 331         * include/bits/range_access.h (ranges::begin): Combine array and
 332         non-array overloads into one function template. Only use ADL for
 333         classes and enums.
 334         (ranges::end, ranges::size): Likewise. Make unbounded arrays
 335         ill-formed.
 336         (ranges::rbegin, ranges::rend): Only use ADL for classes and enums.
 337         Reformat _S_noexcept() functions to mirror operator() structure.
 338         * testsuite/std/ranges/access/begin.cc: Check incomplete array.
 339         * testsuite/std/ranges/access/end_neg.cc: New test.
 340         * testsuite/std/ranges/access/size.cc: Check array of incomplete type.
 341         * testsuite/std/ranges/access/size_neg.cc: New test.
 342
 343         * testsuite/24_iterators/range_access*.cc: Move to ...
 344         * testsuite/24_iterators/range_access/range_access*.cc: ... here.
 345         * testsuite/24_iterators/range_access/range_access_cpp20_neg.cc: New
 346         test.
 347
 348 2019-10-30  Jonathan Wakely  <jwakely@redhat.com>
 349
 350         * include/std/concepts (std::ranges::swap): Use a single overload for
 351         the non-array cases, and switch using if-constexpr.
 352
 353         * include/bits/stl_iterator.h (__normal_iterator::iterator_concept):
 354         Guard with __cpp_lib_concepts macro.
 355
 356         * include/std/bit (__cpp_lib_bitops): Define.
 357         * include/std/version (__cpp_lib_constexpr): Remove.
 358         (__cpp_lib_bitops, __cpp_lib_constexpr_dynamic_alloc): Define.
 359         * testsuite/26_numerics/bit/header.cc: New test.
 360         * testsuite/26_numerics/bit/header-2.cc: New test.
 361         * testsuite/20_util/allocator_traits/header.cc: New test.
 362         * testsuite/20_util/allocator_traits/header-2.cc: New test.
 363
 364         * include/bits/stl_iterator.h (namespace __gnu_cxx): Remove
 365         using-declarations for std::iterator and std::iterator_traits.
 366         (__gnu_cxx::__normal_iterator): Qualify iterator_traits.
 367         * include/ext/algorithm (namespace __gnu_cxx): Remove
 368         using-declarations for std names and qualify those names when used.
 369         Also refer to std::min in parentheses to protect against function-like
 370         macros.
 371         * include/ext/rc_string_base.h: Qualify iterator_traits.
 372         * include/ext/sso_string_base.h: Qualify iterator_traits.
 373
 374         PR libstdc++/92272
 375         * include/bits/stl_bvector.h (_Bit_iterator::pointer)
 376         (_Bit_const_iterator::pointer): Define as void for C++20.
 377         * include/bits/stl_iterator.h (reverse_iterator::operator->()): Add
 378         constraints for C++20.
 379         (__normal_iterator::iterator_concept): Define for C++20.
 380         * include/bits/streambuf_iterator.h (istreambuf_iterator::pointer):
 381         Define as void for C++20.
 382         (ostreambuf_iterator::difference_type): Define as ptrdiff_t for C++20.
 383         (ostreambuf_iterator::ostreambuf_iterator()): Add default constructor
 384         for C++20.
 385         * testsuite/23_containers/vector/bool/iterator_c++20.cc: New test.
 386         * testsuite/24_iterators/bidirectional/concept.cc: New test.
 387         * testsuite/24_iterators/bidirectional/tag.cc: New test.
 388         * testsuite/24_iterators/contiguous/concept.cc: New test.
 389         * testsuite/24_iterators/contiguous/tag.cc: New test.
 390         * testsuite/24_iterators/forward/concept.cc: New test.
 391         * testsuite/24_iterators/forward/tag.cc: New test.
 392         * testsuite/24_iterators/input/concept.cc: New test.
 393         * testsuite/24_iterators/input/tag.cc: New test.
 394         * testsuite/24_iterators/istreambuf_iterator/requirements/typedefs.cc:
 395         New test.
 396         * testsuite/24_iterators/ostreambuf_iterator/requirements/typedefs.cc:
 397         New test.
 398         * testsuite/24_iterators/output/concept.cc: New test.
 399         * testsuite/24_iterators/output/tag.cc: New test.
 400         * testsuite/24_iterators/random_access/concept.cc: New test.
 401         * testsuite/24_iterators/random_access/tag.cc: New test.
 402         * testsuite/24_iterators/range_operations/advance_debug_neg.cc: New
 403         test.
 404         * testsuite/24_iterators/random_access_iterator/26020.cc: Move to ...
 405         * testsuite/24_iterators/operations/26020.cc: ... here.
 406         * testsuite/24_iterators/random_access_iterator/
 407         string_vector_iterators.cc: Move to ...
 408         * testsuite/24_iterators/random_access/string_vector_iterators.cc: ...
 409         here.
 410
 411         * testsuite/util/testsuite_iterators.h: Fix typo in __cplusplus check.
 412
 413 2019-10-29  Jonathan Wakely  <jwakely@redhat.com>
 414
 415         * include/bits/range_access.h (ranges::disable_sized_range)
 416         (ranges::begin, ranges::end, ranges::cbegin, ranges::cend)
 417         (ranges::rbegin, ranges::rend, ranges::crbegin, ranges::crend)
 418         (ranges::size, ranges::empty, ranges::data, ranges::cdata)
 419         (ranges::range, ranges::sized_range, ranges::advance, ranges::distance)
 420         (ranges::next, ranges::prev): Guard with __cpp_lib_concepts.
 421         * include/bits/stl_iterator.h (disable_sized_sentinel): Likewise.
 422
 423         * include/bits/alloc_traits.h (__cpp_lib_constexpr_dynamic_alloc):
 424         Define.
 425         (allocator_traits::_S_construct, allocator_traits::_S_destroy)
 426         (__alloc_on_copy, __alloc_on_move, __alloc_on_swap): Use
 427         _GLIBCXX14_CONSTEXPR instead of constexpr.
 428         * include/bits/stl_construct.h (_Destroy): Likewise.
 429
 430         * include/Makefile.am: Add new header.
 431         * include/Makefile.in: Regenerate.
 432         * include/bits/iterator_concepts.h: New header.
 433         (contiguous_iterator_tag, iter_reference_t, ranges::iter_move)
 434         (iter_rvalue_reference_t, incrementable_traits, iter_difference_t)
 435         (readable_traits, iter_value_t, readable, iter_common_reference_t)
 436         (writable, waekly_incrementable, incrementable)
 437         (input_or_output_iterator, sentinel_for, disable_sized_sentinel)
 438         (sized_sentinel_for, input_iterator, output_iterator)
 439         (forward_iterator, bidirectional_iterator, random_access_iterator)
 440         (contiguous_iterator, indirectly_unary_invocable)
 441         (indirectly_regular_unary_invocable, indirect_unary_predicate)
 442         (indirect_relation, indirect_strict_weak_order, indirect_result_t)
 443         (projected, indirectly_movable, indirectly_movable_storable)
 444         (indirectly_copyable, indirectly_copyable_storable, ranges::iter_swap)
 445         (indirectly_swappable, indirectly_comparable, permutable, mergeable)
 446         (sortable, unreachable_sentinel_t, unreachable_sentinel)
 447         (default_sentinel_t, default_sentinel): Define.
 448         (__detail::__cpp17_iterator, __detail::__cpp17_input_iterator)
 449         (__detail::__cpp17_fwd_iterator, __detail::__cpp17_bidi_iterator)
 450         (__detail::__cpp17_randacc_iterator): Define.
 451         (__iterator_traits): Define constrained specializations.
 452         * include/bits/move.h (move): Only use old concept check for C++98.
 453         * include/bits/range_access.h (ranges::disable_sized_range)
 454         (ranges::begin, ranges::end, ranges::cbegin, ranges::cend)
 455         (ranges::rbegin, ranges::rend, ranges::crbegin, ranges::crend)
 456         (ranges::size, ranges::empty, ranges::data, ranges::cdata): Define
 457         new customization points for C++20.
 458         (ranges::range, ranges::sized_range): Define new concepts for C++20.
 459         (ranges::advance, ranges::distance, ranges::next, ranges::prev):
 460         Define new functions for C++20.
 461         (__adl_end, __adl_cdata, __adl_cbegin, __adl_cend, __adl_rbegin)
 462         (__adl_rend, __adl_crbegin, __adl_crend, __adl_cdata, __adl_size)
 463         (__adl_empty): Remove.
 464         * include/bits/stl_iterator.h (disable_sized_sentinel): Specialize
 465         for reverse_iterator.
 466         * include/bits/stl_iterator_base_types.h (contiguous_iterator_tag):
 467         Define new struct for C++20.
 468         (iterator_traits<_Tp*>): Constrain partial specialization in C++20.
 469         * include/std/concepts (__is_class_or_enum): Move to __detail
 470         namespace.
 471         * testsuite/20_util/forward/c_neg.cc: Adjust dg-error line number.
 472         * testsuite/20_util/forward/f_neg.cc: Likewise.
 473         * testsuite/24_iterators/associated_types/incrementable.traits.cc: New
 474         test.
 475         * testsuite/24_iterators/associated_types/readable.traits.cc: New test.
 476         * testsuite/24_iterators/contiguous/concept.cc: New test.
 477         * testsuite/24_iterators/contiguous/tag.cc: New test.
 478         * testsuite/24_iterators/customization_points/iter_move.cc: New test.
 479         * testsuite/24_iterators/customization_points/iter_swap.cc: New test.
 480         * testsuite/24_iterators/headers/iterator/synopsis_c++20.cc: New test.
 481         * testsuite/24_iterators/range_operations/advance.cc: New test.
 482         * testsuite/24_iterators/range_operations/distance.cc: New test.
 483         * testsuite/24_iterators/range_operations/next.cc: New test.
 484         * testsuite/24_iterators/range_operations/prev.cc: New test.
 485         * testsuite/26_numerics/adjacent_difference/requirements/
 486         explicit_instantiation/2.cc: Rename types that conflict with C++20
 487         concepts.
 488         * testsuite/26_numerics/adjacent_difference/requirements/
 489         explicit_instantiation/pod.cc: Likewise.
 490         * testsuite/26_numerics/partial_sum/requirements/
 491         explicit_instantiation/2.cc: Likewise.
 492         * testsuite/26_numerics/partial_sum/requirements/
 493         explicit_instantiation/pod.cc: Likewise.
 494         * testsuite/experimental/iterator/requirements.cc: Likewise.
 495         * testsuite/std/ranges/access/begin.cc: New test.
 496         * testsuite/std/ranges/access/cbegin.cc: New test.
 497         * testsuite/std/ranges/access/cdata.cc: New test.
 498         * testsuite/std/ranges/access/cend.cc: New test.
 499         * testsuite/std/ranges/access/crbegin.cc: New test.
 500         * testsuite/std/ranges/access/crend.cc: New test.
 501         * testsuite/std/ranges/access/data.cc: New test.
 502         * testsuite/std/ranges/access/empty.cc: New test.
 503         * testsuite/std/ranges/access/end.cc: New test.
 504         * testsuite/std/ranges/access/rbegin.cc: New test.
 505         * testsuite/std/ranges/access/rend.cc: New test.
 506         * testsuite/std/ranges/access/size.cc: New test.
 507         * testsuite/util/testsuite_iterators.h (contiguous_iterator_wrapper)
 508         (test_range, test_sized_range): New test utilities.
 509
 510         * testsuite/util/testsuite_iterators.h (BoundsContainer::size()): Add
 511         new member function.
 512         (WritableObject::operator=): Constrain with enable_if when available.
 513         (remove_cv): Use std::remove_if when available.
 514         (test_container::it(int)): Use size().
 515         (test_container::size()): Use BoundsContainer::size().
 516
 517         PR libstdc++/92267
 518         * include/bits/stl_deque.h (_Deque_iterator(const _Deque_iterator&)):
 519         Do not define as defaulted.
 520         * testsuite/23_containers/deque/types/92267.cc: New test.
 521
 522 2019-10-26  Gerald Pfeifer  <gerald@pfeifer.com>
 523
 524         * doc/xml/manual/codecvt.xml: Switch pubs.opengroup.org to https.
 525         * doc/xml/manual/locale.xml (LC_ALL): Ditto.
 526         * doc/xml/manual/messages.xml: Ditto.
 527
 528 2019-10-26  John David Anglin  <danglin@gcc.gnu.org>
 529
 530         * config/abi/post/hppa-linux-gnu/baseline_symbols.txt: Update.
 531
 532 2019-10-25  Jonathan Wakely  <jwakely@redhat.com>
 533
 534         * testsuite/util/testsuite_iterators.h (output_iterator_wrapper)
 535         (input_iterator_wrapper, forward_iterator_wrapper)
 536         bidirectional_iterator_wrapper, random_access_iterator_wrapper): Remove
 537         user-provided copy constructors and copy assignment operators so they
 538         are defined implicitly.
 539         (input_iterator_wrapper): Initialize members in default constructor.
 540         (forward_iterator_wrapper): Remove assignments to members of base.
 541
 542         * include/bits/allocator.h: Check __cpp_constexpr_dynamic_alloc
 543         before making the std::allocator destructor constexpr.
 544         * testsuite/20_util/allocator/requirements/constexpr.cc: New test.
 545
 546         * include/bits/range_cmp.h: Check __cpp_lib_concepts before defining
 547         concepts. Fix comment.
 548         * include/bits/allocator.h
 549
 550 2019-10-25  Gerald Pfeifer  <gerald@pfeifer.com>
 551
 552         * doc/xml/manual/policy_data_structures_biblio.xml: Switch
 553         pubs.opengroup.org to https.
 554
 555 2019-10-25  Gerald Pfeifer  <gerald@pfeifer.com>
 556
 557         * doc/xml/gnu/gpl-3.0.xml: Switch www.gnu.org to https.
 558
 559 2019-09-09  Edward Smith-Rowland  <3dw4rd@verizon.net>
 560
 561         * doc/xml/manual/status_cxx2020.xml: Add rows and update status.
 562
 563 2019-10-24  Jonathan Wakely  <jwakely@redhat.com>
 564
 565         * include/bits/allocator.h (allocator<void>): Restore the explicit
 566         specialization for C++20, but make its API consistent with the primary
 567         template.
 568         (allocator::~allocator()): Restore the destructor for C++20, but make
 569         it constexpr.
 570         * testsuite/20_util/allocator/rebind_c++20.cc: Check allocator<void>.
 571         * testsuite/20_util/allocator/requirements/typedefs_c++20.cc: Likewise.
 572         * testsuite/20_util/allocator/void.cc: Check that constructors and
 573         destructors are trivial. Check for converting constructor in C++20.
 574         * testsuite/ext/malloc_allocator/variadic_construct.cc: Simplify
 575         dejagnu target selector.
 576         * testsuite/ext/new_allocator/variadic_construct.cc: Likewise.
 577
 578         * include/experimental/executor (__use_future_ct, use_future_t):
 579         Define partial specializations for std::allocator.
 580         (__use_future_ch): Overload constructor for completion tokens using
 581         std::allocator.
 582
 583         PR libstdc++/88338 Implement P0898R3, C++20 concepts library
 584         * doc/xml/manual/status_cxx2020.xml: Update status.
 585         * doc/html/*: Regenerate.
 586         * testsuite/std/concepts/1.cc: New test.
 587         * testsuite/std/concepts/2.cc: New test.
 588
 589         * include/bits/random.h (uniform_random_bit_generator): Define for
 590         C++20.
 591         * testsuite/26_numerics/random/concept.cc: New test.
 592         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error line.
 593
 594 2019-10-23  Jonathan Wakely  <jwakely@redhat.com>
 595
 596         * include/std/functional (invoke): Add constexpr for C++20.
 597         * include/std/version (__cpp_lib_constexpr_invoke): Define.
 598         * testsuite/20_util/function_objects/invoke/constexpr.cc: New test.
 599
 600         PR c++/91369 Implement P0784R7 changes to allocation and construction
 601         * include/bits/alloc_traits.h: Include <bits/stl_construct.h>.
 602         (allocator_traits::_S_allocate, allocator_traits::_S_construct)
 603         (allocator_traits::_S_destroy, allocator_traits::_S_max_size)
 604         (allocator_traits::_S_select, allocator_traits::allocate)
 605         (allocator_traits::deallocate, allocator_traits::construct)
 606         (allocator_traits::destroy, allocator_traits::max_size)
 607         (allocator_traits::select_on_container_copy_construction)
 608         (allocator_traits<allocator<T>>): Add constexpr specifier for C++20.
 609         (allocator_traits<allocator<T>>::construct): Use construct_at.
 610         (allocator_traits<allocator<T>>::destroy): Use destroy_at.
 611         (__alloc_on_copy, __alloc_on_move, __alloc_on_swap): Add constexpr
 612         specifier.
 613         (_Destroy(ForwardIterator, ForwardIterator, Alloc&))
 614         (_Destroy(ForwardIterator, ForwardIterator, allocator<T>&)): Move here
 615         from <bits/stl_construct.h>.
 616         * include/bits/allocator.h (allocator::~allocator): Remove for C++20.
 617         (allocator::allocate, allocate::deallocate): Define for C++20 and up.
 618         (operator==, operator!=): Add constexpr specifier for C++20.
 619         * include/bits/stl_construct.h: Don't include <ext/alloc_traits.h>.
 620         (destroy_at): For C++20 add constexpr specifier and support for
 621         destroying arrays.
 622         (construct_at): Define new function for C++20.
 623         (_Construct): Return result of placement new-expression. For C++11 and
 624         up add constexpr. For C++20 dispatch to std::construct_at during
 625         constant evaluation.
 626         (_Destroy(pointer)): Add constexpr specifier. For C++20 dispatch to
 627         std::destroy_at during constant evaluation.
 628         (_Destroy_aux::__destroy, _Destroy_n_aux::__destroy_n): Add constexpr
 629         specifier for C++20.
 630         (_Destroy(ForwardIterator, ForwardIterator))
 631         (_Destroy(ForwardIterator, Size)): Likewise. Do not elide trivial
 632         destructors during constant evaluation.
 633         (destroy, destroy_n): Add constexpr specifier for C++20.
 634         (_Destroy(ForwardIterator, ForwardIterator, Alloc&))
 635         (_Destroy(ForwardIterator, ForwardIterator, allocator<T>&)): Move to
 636         <bits/alloc_traits.h>, to remove dependency on allocators.
 637         * include/bits/stl_uninitialized.h: Include <ext/alloc_traits.h>.
 638         Include <bits/stl_pair.h> instead of <utility>.
 639         * include/ext/alloc_traits.h: Always include <bits/alloc_traits.h>.
 640         (__alloc_traits::construct, __alloc_traits::destroy)
 641         (__alloc_traits::_S_select_on_copy, __alloc_traits::_S_on_swap): Add
 642         constexpr specifier.
 643         * include/ext/malloc_allocator.h  (operator==, operator!=): Add
 644         constexpr specifier for C++20.
 645         * include/ext/new_allocator.h (operator==, operator!=): Likewise.
 646         * testsuite/20_util/headers/memory/synopsis.cc: Add constexpr.
 647         * testsuite/20_util/scoped_allocator/69293_neg.cc: Ignore additional
 648         errors due to constexpr function called after failed static_assert.
 649         * testsuite/20_util/specialized_algorithms/construct_at/1.cc: New test.
 650         * testsuite/23_containers/vector/cons/destructible_debug_neg.cc:
 651         Ignore additional errors due to constexpr function called after failed
 652         static_assert.
 653         * testsuite/23_containers/vector/cons/destructible_neg.cc: Likewise.
 654
 655         * testsuite/20_util/bind/91371.cc: Fix test to compile as C++11.
 656
 657         * include/debug/helper_functions.h (__valid_range): Change
 658         _GLIBCXX_CONSTEXPR to _GLIBCXX14_CONSTEXPR.
 659
 660         * include/ext/throw_allocator.h (throw_allocator_base): Qualify
 661         size_t and ptrdiff_t.
 662
 663         * include/ext/pb_ds/detail/bin_search_tree_/bin_search_tree_.hpp:
 664         Use detail::rebind_traits.
 665         * include/ext/pb_ds/detail/bin_search_tree_/node_iterators.hpp:
 666         Likewise.
 667         * include/ext/pb_ds/detail/bin_search_tree_/traits.hpp: Likewise.
 668         * include/ext/pb_ds/detail/binary_heap_/binary_heap_.hpp: Likewise.
 669         * include/ext/pb_ds/detail/binary_heap_/entry_cmp.hpp: Likewise.
 670         * include/ext/pb_ds/detail/binary_heap_/entry_pred.hpp: Likewise.
 671         * include/ext/pb_ds/detail/binary_heap_/point_const_iterator.hpp:
 672         Likewise.
 673         * include/ext/pb_ds/detail/binomial_heap_base_/binomial_heap_base_.hpp:
 674         Likewise.
 675         * include/ext/pb_ds/detail/branch_policy/branch_policy.hpp: Likewise.
 676         * include/ext/pb_ds/detail/cc_hash_table_map_/cc_ht_map_.hpp: Likewise.
 677         * include/ext/pb_ds/detail/cond_dealtor.hpp: Likewise.
 678         * include/ext/pb_ds/detail/eq_fn/hash_eq_fn.hpp (has_eq_fn): Likewise.
 679         * include/ext/pb_ds/detail/gp_hash_table_map_/gp_ht_map_.hpp: Likewise.
 680         * include/ext/pb_ds/detail/hash_fn/ranged_hash_fn.hpp: Likewise.
 681         * include/ext/pb_ds/detail/hash_fn/ranged_probe_fn.hpp: Likewise.
 682         * include/ext/pb_ds/detail/left_child_next_sibling_heap_/
 683         left_child_next_sibling_heap_.hpp: Likewise.
 684         * include/ext/pb_ds/detail/left_child_next_sibling_heap_/node.hpp:
 685         Likewise.
 686         * include/ext/pb_ds/detail/left_child_next_sibling_heap_/
 687         point_const_iterator.hpp: Likewise.
 688         * include/ext/pb_ds/detail/list_update_map_/lu_map_.hpp: Likewise.
 689         * include/ext/pb_ds/detail/ov_tree_map_/
 690         constructors_destructor_fn_imps.hpp: Likewise.
 691         * include/ext/pb_ds/detail/ov_tree_map_/node_iterators.hpp: Likewise.
 692         * include/ext/pb_ds/detail/ov_tree_map_/ov_tree_map_.hpp: Likewise.
 693         * include/ext/pb_ds/detail/pairing_heap_/pairing_heap_.hpp: Likewise.
 694         * include/ext/pb_ds/detail/pat_trie_/pat_trie_.hpp: Likewise.
 695         * include/ext/pb_ds/detail/pat_trie_/pat_trie_base.hpp: Likewise.
 696         * include/ext/pb_ds/detail/rb_tree_map_/node.hpp: Likewise.
 697         * include/ext/pb_ds/detail/rc_binomial_heap_/rc.hpp: Likewise.
 698         * include/ext/pb_ds/detail/splay_tree_/node.hpp: Likewise.
 699         * include/ext/pb_ds/detail/thin_heap_/thin_heap_.hpp: Likewise.
 700         * include/ext/pb_ds/detail/trie_policy/sample_trie_access_traits.hpp:
 701         Likewise.
 702         * include/ext/pb_ds/detail/type_utils.hpp: Fix typo in comment.
 703         * include/ext/pb_ds/detail/types_traits.hpp (stored_value): Add
 704         bool parameter to control whether the hash value is stored.
 705         (select_base_type): New class template and partial specialization.
 706         (maybe_null_type): Likewise.
 707         (rebind_traits): New class template.
 708         (type_base): Remove four nearly identical specializations.
 709         (type_dispatch): Remove.
 710         (type_traits): Use select_base_type and maybe_null_type instead of
 711         type_base to control differences between specializations.
 712         * include/ext/pb_ds/list_update_policy.hpp: Use detail::rebind_traits.
 713         * include/ext/pb_ds/priority_queue.hpp: Likewise.
 714         * include/ext/pb_ds/tree_policy.hpp: Likewise.
 715         * include/ext/pb_ds/trie_policy.hpp: Likewise.
 716
 717         * include/backward/hash_set (hash_set): Use __alloc_traits.
 718         * include/backward/hashtable.h (_Hashtable): Likewise.
 719         * include/ext/alloc_traits.h (__alloc_traits::allocate): Add overload
 720         taking a hint.
 721         * include/ext/extptr_allocator.h (_ExtPtr_allocator::allocate): Ignore
 722         hint.
 723         * include/ext/slist (_Slist_base): Use __alloc_traits.
 724         * include/tr1/hashtable.h (_Hashtable): Likewise.
 725         * include/tr1/regex (match_results): Use vector::const_reference
 726         instead of assuming the allocator defines it.
 727         * testsuite/backward/hash_map/23528.cc: Use allocator_traits in C++11.
 728         * testsuite/tr1/6_containers/unordered_map/capacity/29134-map.cc: Use
 729         __gnu_test::max_size.
 730         * testsuite/tr1/6_containers/unordered_multimap/capacity/
 731         29134-multimap.cc: Likewise.
 732         * testsuite/tr1/6_containers/unordered_multiset/capacity/
 733         29134-multiset.cc: Likewise.
 734         * testsuite/tr1/6_containers/unordered_set/capacity/29134-set.cc:
 735         Likewise.
 736
 737 2019-10-22  Jonathan Wakely  <jwakely@redhat.com>
 738
 739         * testsuite/util/testsuite_abi.h: Restore use of tr1/unordered_map
 740         when compiled as C++98.
 741
 742         * include/bits/memoryfwd.h (uses_allocator): Do not declare for C++98.
 743         * testsuite/17_intro/names.cc: Check uses_allocator in C++98.
 744
 745         * include/bits/alloc_traits.h
 746         (allocator_traits<allocator<T>>::allocate): Ignore hint for C++20.
 747         (allocator_traits<allocator<T>>::construct): Perform placement new
 748         directly for C++20, instead of calling allocator<T>::construct.
 749         (allocator_traits<allocator<T>>::destroy): Call destructor directly
 750         for C++20, instead of calling allocator<T>::destroy.
 751         (allocator_traits<allocator<T>>::max_size): Return value directly
 752         for C++20, instead of calling std::allocator<T>::max_size().
 753         (__do_alloc_on_copy, __do_alloc_on_move, __do_alloc_on_swap): Do not
 754         define for C++17 and up.
 755         (__alloc_on_copy, __alloc_on_move, __alloc_on_swap): Use if-constexpr
 756         for C++17 and up, instead of tag dispatching.
 757         * include/bits/allocator.h (allocator<void>): Remove for C++20.
 758         (allocator::pointer, allocator::const_pointer, allocator::reference)
 759         (allocator::const_reference, allocator::rebind): Remove for C++20.
 760         * include/bits/basic_string.h (basic_string): Use __alloc_traits to
 761         rebind allocator.
 762         * include/bits/memoryfwd.h (allocator<void>): Remove for C++20.
 763         * include/ext/debug_allocator.h: Use __alloc_traits for rebinding.
 764         * include/ext/malloc_allocator.h (malloc_allocator::~malloc_allocator)
 765         (malloc_allocator::pointer, malloc_allocator::const_pointer)
 766         (malloc_allocator::reference, malloc_allocator::const_reference)
 767         (malloc_allocator::rebind, malloc_allocator::max_size)
 768         (malloc_allocator::construct, malloc_allocator::destroy): Do not
 769         define for C++20.
 770         (malloc_allocator::_M_max_size): Define new function.
 771         * include/ext/new_allocator.h (new_allocator::~new_allocator)
 772         (new_allocator::pointer, new_allocator::const_pointer)
 773         (new_allocator::reference, new_allocator::const_reference)
 774         (new_allocator::rebind, new_allocator::max_size)
 775         (new_allocator::construct, new_allocator::destroy): Do not
 776         define for C++20.
 777         (new_allocator::_M_max_size): Define new function.
 778         * include/ext/rc_string_base.h (__rc_string_base::_Rep): Use
 779         __alloc_traits to rebind allocator.
 780         * include/ext/rope (_Rope_rep_base, _Rope_base): Likewise.
 781         (rope::rope(CharT, const allocator_type&)): Use __alloc_traits
 782         to construct character.
 783         * include/ext/slist (_Slist_base): Use __alloc_traits to rebind
 784         allocator.
 785         * include/ext/sso_string_base.h (__sso_string_base::_M_max_size):
 786         Use __alloc_traits.
 787         * include/ext/throw_allocator.h (throw_allocator): Do not use optional
 788         members of std::allocator, use __alloc_traits members instead.
 789         * include/ext/vstring.h (__versa_string): Use __alloc_traits.
 790         * include/ext/vstring_util.h (__vstring_utility): Likewise.
 791         * include/std/memory: Include <bits/alloc_traits.h>.
 792         * testsuite/20_util/allocator/8230.cc: Use __gnu_test::max_size.
 793         * testsuite/20_util/allocator/rebind_c++20.cc: New test.
 794         * testsuite/20_util/allocator/requirements/typedefs.cc: Do not check
 795         for pointer, const_pointer, reference, const_reference or rebind in
 796         C++20.
 797         * testsuite/20_util/allocator/requirements/typedefs_c++20.cc: New test.
 798         * testsuite/23_containers/deque/capacity/29134.cc: Use
 799         __gnu_test::max_size.
 800         * testsuite/23_containers/forward_list/capacity/1.cc: Likewise.
 801         * testsuite/23_containers/list/capacity/29134.cc: Likewise.
 802         * testsuite/23_containers/map/capacity/29134.cc: Likewise.
 803         * testsuite/23_containers/multimap/capacity/29134.cc: Likewise.
 804         * testsuite/23_containers/multiset/capacity/29134.cc: Likewise.
 805         * testsuite/23_containers/set/capacity/29134.cc: Likewise.
 806         * testsuite/23_containers/vector/capacity/29134.cc: Likewise.
 807         * testsuite/ext/malloc_allocator/variadic_construct.cc: Do not run
 808         test for C++20.
 809         * testsuite/ext/new_allocator/variadic_construct.cc: Likewise.
 810         * testsuite/ext/vstring/capacity/29134.cc: Use __gnu_test::max_size.
 811         * testsuite/util/replacement_memory_operators.h: Do not assume
 812         Alloc::pointer exists.
 813         * testsuite/util/testsuite_allocator.h (__gnu_test::max_size): Define
 814         helper to call max_size for any allocator.
 815
 816 2019-10-22  Andreas Schwab  <schwab@suse.de>
 817
 818         * config/abi/post/aarch64-linux-gnu/baseline_symbols.txt: Update.
 819
 820 2019-10-18  Jonathan Wakely  <jwakely@redhat.com>
 821
 822         PR libstdc++/92143
 823         * libsupc++/new_opa.cc (operator new) [__APPLE__]: Increase alignment
 824         to at least sizeof(void*).
 825
 826         * include/bits/range_cmp.h (ranges::less::operator()): Inline the
 827         logic from std::less::operator() to remove the dependency on it.
 828
 829 2019-10-17  Jonathan Wakely  <jwakely@redhat.com>
 830
 831         * doc/doxygen/user.cfg.in (INPUT): Add new C++17 and C++20 headers.
 832
 833         * include/Makefile.am: Add new header.
 834         * include/Makefile.in: Regenerate.
 835         * include/bits/range_cmp.h: New header for C++20 function objects.
 836         * include/std/functional: Include new header.
 837         * testsuite/20_util/function_objects/identity/1.cc: New test.
 838         * testsuite/20_util/function_objects/range.cmp/equal_to.cc: New test.
 839         * testsuite/20_util/function_objects/range.cmp/greater.cc: New test.
 840         * testsuite/20_util/function_objects/range.cmp/greater_equal.cc: New
 841         test.
 842         * testsuite/20_util/function_objects/range.cmp/less.cc: New test.
 843         * testsuite/20_util/function_objects/range.cmp/less_equal.cc: New test.
 844         * testsuite/20_util/function_objects/range.cmp/not_equal_to.cc: New
 845         test.
 846
 847         PR libstdc++/92124
 848         * include/bits/forward_list.h
 849         (_M_move_assign(forward_list&&, false_type)): Do not use
 850         __make_move_if_noexcept, instead move unconditionally.
 851         * include/bits/stl_deque.h (_M_move_assign2(deque&&, false_type)):
 852         Likewise.
 853         * include/bits/stl_list.h (_M_move_assign(list&&, false_type)):
 854         Likewise.
 855         * include/bits/stl_vector.h (_M_move_assign(vector&&, false_type)):
 856         Likewise.
 857         * testsuite/23_containers/vector/92124.cc: New test.
 858
 859 2019-10-16  Jonathan Wakely  <jwakely@redhat.com>
 860
 861         * include/bits/c++config (_GLIBCXX_BUILTIN_IS_SAME_AS): Define to
 862         one of __is_same_as or __is_same when available.
 863         * include/std/concepts (__detail::__same_as): Use std::is_same_v.
 864         * include/std/type_traits (is_same) [_GLIBCXX_BUILTIN_IS_SAME_AS]:
 865         Use new macro instead of __is_same_as.
 866         (is_same) [!_GLIBCXX_BUILTIN_IS_SAME_AS]: Restore partial
 867         specialization.
 868         (is_same_v) [_GLIBCXX_BUILTIN_IS_SAME_AS]: Use new macro.
 869         (is_same_v) [!_GLIBCXX_BUILTIN_IS_SAME_AS]: Use std::is_same.
 870
 871 2019-10-16  François Dumont  <fdumont@gcc.gnu.org>
 872
 873         * src/c++11/debug.cc (print_field): Replace constness_names <unknown>
 874         entry with <unknown constness>. Replace state_names <unknown> entry with
 875         <unknown state>.
 876
 877 2019-10-11  Jonathan Wakely  <jwakely@redhat.com>
 878
 879         * include/Makefile.am: Add new header.
 880         * include/Makefile.in: Regenerate.
 881         * include/precompiled/stdc++.h: Include <concepts>.
 882         * include/std/concepts: New header for C++20.
 883         * include/std/version (__cpp_lib_concepts): Define.
 884         * scripts/create_testsuite_files: Look for test files in new std
 885         directory.
 886         * testsuite/libstdc++-dg/conformance.exp: Likewise.
 887         * testsuite/std/concepts/concepts.callable/invocable.cc: New test.
 888         * testsuite/std/concepts/concepts.callable/regular_invocable.cc: New
 889         test.
 890         * testsuite/std/concepts/concepts.callable/relation.cc: New test.
 891         * testsuite/std/concepts/concepts.callable/strictweakorder.cc: New
 892         test.
 893         * testsuite/std/concepts/concepts.lang/concept.arithmetic/
 894         floating_point.cc: New test.
 895         * testsuite/std/concepts/concepts.lang/concept.arithmetic/integral.cc:
 896         New test.
 897         * testsuite/std/concepts/concepts.lang/concept.arithmetic/
 898         signed_integral.cc: New test.
 899         * testsuite/std/concepts/concepts.lang/concept.arithmetic/
 900         unsigned_integral.cc: New test.
 901         * testsuite/std/concepts/concepts.lang/concept.assignable/1.cc: New
 902         test.
 903         * testsuite/std/concepts/concepts.lang/concept.common/1.cc: New test.
 904         * testsuite/std/concepts/concepts.lang/concept.commonref/1.cc: New
 905         test.
 906         * testsuite/std/concepts/concepts.lang/concept.constructible/1.cc:
 907         New test.
 908         * testsuite/std/concepts/concepts.lang/concept.convertible/1.cc:
 909         New test.
 910         * testsuite/std/concepts/concepts.lang/concept.copyconstructible/1.cc:
 911         New test.
 912         * testsuite/std/concepts/concepts.lang/concept.defaultconstructible/
 913         1.cc: New test.
 914         * testsuite/std/concepts/concepts.lang/concept.derived/1.cc:
 915         New test.
 916         * testsuite/std/concepts/concepts.lang/concept.destructible/1.cc:
 917         New test.
 918         * testsuite/std/concepts/concepts.lang/concept.moveconstructible/1.cc:
 919         New test.
 920         * testsuite/std/concepts/concepts.lang/concept.same/1.cc:
 921         New test.
 922         * testsuite/std/concepts/concepts.lang/concept.swappable/swap.cc:
 923         New test.
 924         * testsuite/std/concepts/concepts.lang/concept.swappable/swappable.cc:
 925         New test.
 926         * testsuite/std/concepts/concepts.lang/concept.swappable/
 927         swappable_with.cc: New test.
 928         * testsuite/std/concepts/concepts.object/copyable.cc: New test.
 929         * testsuite/std/concepts/concepts.object/movable.cc: New test.
 930         * testsuite/std/concepts/concepts.object/regular.cc: New test.
 931         * testsuite/std/concepts/concepts.object/semiregular.cc: New test.
 932
 933         * include/std/type_traits (is_same): Replace partial specialization
 934         by using __is_same_as built-in in primary template.
 935         (is_same_v): Use __is_same_as built-in instead of instantiating the
 936         is_same trait.
 937
 938         PR libstdc++/92059
 939         * include/tr2/dynamic_bitset (__dynamic_bitset_base): Define all
 940         special member functions as defaulted. Add noexcept to most members.
 941         (__dynamic_bitset_base(size_t, unsigned long long, const _Alloc&)):
 942         Mask off unwanted bits in the __val parameter. Avoid undefined left
 943         shifts.
 944         (__dynamic_bitset_base::_M_assign): Remove.
 945         (__dynamic_bitset_base::_M_do_reset): Use std::fill.
 946         (__dynamic_bitset_base::_M_are_all_aux): Avoid integer promotion when
 947         block_type has lower rank than int.
 948         (dynamic_bitset): Add noexcept to most members. Use injected-class-name
 949         in return types and parameter types.
 950         (dynamic_bitset::_M_Nb): Add default member initializer.
 951         (dynamic_bitset(), dynamic_bitset(const dynamic_bitset&)): Define as
 952         defaulted.
 953         (dynamic_bitset(dynamic_bitset&&)): Clear source object after move.
 954         (dynamic_bitset::operator=(const dynamic_bitset&)): Define as
 955         defaulted.
 956         (dynamic_bitset::operator=(dynamic_bitset&&)): Add noexcept-specifier.
 957         Define without using swap, to propagate allocator correctly.
 958         (dynamic_bitset(const char*, const _Alloc&)): Use strlen.
 959         (dynamic_bitset::_M_do_sanitize, dynamic_bitset::_M_do_fill): Use
 960         casts to avoid unwanted integer promotions.
 961         (dynamic_bitset::_M_copy_from_ptr): Rearrange template parameters and
 962         add default template arguments and default argument to simplify usage.
 963         (dynamic_bitset::_M_copy_from_string): Adjust call to _M_copy_from_ptr.
 964         (operator==(const dynamic_bitset&, const dynamic_bitset&))
 965         (operator<(const dynamic_bitset&, const dynamic_bitset&)): Use _M_Nb.
 966         * include/tr2/dynamic_bitset.tcc (dynamic_bitset::_M_copy_from_ptr):
 967         Adjust template parameters to match declaration.
 968         * testsuite/tr2/dynamic_bitset/cmp.cc: New test.
 969         * testsuite/tr2/dynamic_bitset/cons.cc: New test.
 970         * testsuite/tr2/dynamic_bitset/copy.cc: New test.
 971         * testsuite/tr2/dynamic_bitset/move.cc: New test.
 972         * testsuite/tr2/dynamic_bitset/pr92059.cc: New test.
 973
 974         * include/bits/charconv.h (__to_chars_len): Avoid -Wsign-compare
 975         warnings.
 976
 977 2019-10-10  Jonathan Wakely  <jwakely@redhat.com>
 978
 979         PR libstdc++/91057
 980         * src/c++98/locale.cc [_GLIBCXX_LONG_DOUBLE_COMPAT]
 981         (find_ldbl_sync_facet): Fix parameter type and missing return.
 982
 983 2019-10-09  Marek Polacek  <polacek@redhat.com>
 984
 985         PR c++/91364 - P0388R4: Permit conversions to arrays of unknown bound.
 986         PR c++/69531 - DR 1307: Differently bounded array parameters.
 987         PR c++/88128 - DR 330: Qual convs and pointers to arrays of pointers.
 988         * testsuite/23_containers/span/lwg3255.cc: Adjust test to match the
 989         post-P0388R4 behavior.
 990
 991 2019-10-09  Jonathan Wakely  <jwakely@redhat.com>
 992
 993         PR libstdc++/91057
 994         * src/c++98/locale.cc (locale::id::_M_id()) [__GTHREADS]: Use atomic
 995         compare-exchange or double-checked lock to ensure only one thread sets
 996         the _M_index variable.
 997         [_GLIBCXX_LONG_DOUBLE_COMPAT]: Call find_ldbl_sync_facet to detect
 998         facets that share another facet's ID.
 999         [_GLIBCXX_LONG_DOUBLE_COMPAT] (find_ldbl_sync_facet): New function.
1000
1001         PR libstdc++/78552
1002         * src/c++98/locale_init.cc (locale::classic()): Do not construct a new
1003         locale object for every call.
1004         (locale::_S_initialize_once()): Construct C locale here.
1005
1006 2019-10-08  Jonathan Wakely  <jwakely@redhat.com>
1007
1008         * doc/Makefile.am (doc-html-docbook-regenerate): New target.
1009         (${docbook_outdir}/html): Do not create unused 'html/ext' directory.
1010         * doc/Makefile.in: Regenerate.
1011         * doc/xml/manual/documentation_hacking.xml: Document new target.
1012         * doc/html/*: Regenerate.
1013
1014         * doc/xml/manual/allocator.xml: Use archived copy of CUJ article.
1015         * doc/html/*: Regenerate.
1016
1017 2019-10-06  François Dumont  <fdumont@gcc.gnu.org>
1018
1019         * include/bits/stl_algo.h
1020         (__copy_n_a(_IIte, _Size, _OIte)): New.
1021         (__copy_n_a(istreambuf_iterator<>, _Size, _CharT*)): New declaration.
1022         (__copy_n(_IIte, _Size, _OIte, input_iterator_tag)): Adapt to use
1023         latter.
1024         * include/bits/streambuf_iterator.h (istreambuf_iterator<>): Declare
1025         std::__copy_n_a friend.
1026         (__copy_n_a(istreambuf_iterator<>, _Size, _CharT*)): New.
1027         * testsuite/25_algorithms/copy_n/istreambuf_iterator/1.cc: New.
1028         * testsuite/25_algorithms/copy_n/istreambuf_iterator/1_neg.cc: New.
1029         * testsuite/25_algorithms/copy_n/istreambuf_iterator/2_neg.cc: New.
1030
1031         * include/bits/stl_iterator_base_types.h (__iterator_category_t): Define
1032         for C++11.
1033         (_RequireInputIte): Likewise and use __enable_if_t.
1034         * include/std/numeric
1035         (__is_random_access_iter): Use __iterator_category_t.
1036
1037         * include/bits/stl_algo.h (copy_n): Add __glibcxx_requires_can_increment
1038         debug checks.
1039         * testsuite/25_algorithms/copy_n/debug/1_neg.cc: New.
1040         * testsuite/25_algorithms/copy_n/debug/2_neg.cc: New.
1041
1042 2019-10-04  François Dumont  <fdumont@gcc.gnu.org>
1043
1044         * include/debug/forward_list
1045         (_Sequence_traits<__debug::forward_list<>>::_S_size): Returns __dp_sign
1046         distance when not empty.
1047         * include/debug/list (_Sequence_traits<__debug::list<>>::_S_size):
1048         Likewise.
1049         * include/debug/helper_functions.h (__dp_sign_max_size): New
1050         _Distance_precision enum entry.
1051         (__valid_range_aux(_IIte, _IIte, _Distance_traits<>::__type,
1052         __false_type)): Adapt.
1053         * include/debug/safe_iterator.tcc
1054         (_Safe_iterator<>::_M_get_distance_to(const _Safe_iterator&)): Review
1055         distance computation.
1056
1057 2019-10-04  Jonathan Wakely  <jwakely@redhat.com>
1058
1059         PR libstdc++/81091
1060         PR libstdc++/91947
1061         * configure.ac: Use AC_SYS_LARGEFILE to enable 64-bit file APIs.
1062         * config.h.in: Regenerate:
1063         * configure: Regenerate:
1064         * include/Makefile.am (${host_builddir}/largefile-config.h): New
1065         target to generate config header for filesystem library.
1066         (${host_builddir}/c++config.h): Rename macros for large file support.
1067         * include/Makefile.in: Regenerate.
1068         * src/c++17/fs_dir.cc: Include new config header.
1069         * src/c++17/fs_ops.cc: Likewise.
1070         (filesystem::file_size): Use uintmax_t for size.
1071         * src/filesystem/dir.cc: Include new config header.
1072         * src/filesystem/ops.cc: Likewise.
1073         (experimental::filesystem::file_size): Use uintmax_t for size.
1074
1075         * testsuite/util/testsuite_abi.h: Use std::unordered_map instead of
1076         std::tr1::unordered_map.
1077         * testsuite/util/testsuite_allocator.h: Likewise.
1078
1079         * include/tr1/hashtable.h: Add header for __gnu_cxx::__alloc_traits.
1080
1081         * include/tr1/hashtable.h (tr1::_Hashtable::_M_allocate_node): Use
1082         __gnu_cxx::__alloc_traits for allocator construct function.
1083         (tr1::_Hashtable::_M_deallocate_node): Likewise for destroy function.
1084
1085         * include/precompiled/stdc++.h: Include <span> for C++20.
1086         * testsuite/17_intro/names.cc: Do not define 'e' for C++20.
1087
1088 2019-10-03  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
1089
1090         * include/parallel/multiway_merge.h (_RAIter3): Replace _C by _Cp.
1091
1092 2019-10-02  Jonathan Wakely  <jwakely@redhat.com>
1093
1094         * config/abi/pre/gnu.ver: Tighten up greedy wildcards.
1095
1096         * doc/xml/manual/parallel_mode.xml: Add caveat about support for
1097         recent standards.
1098         * doc/html/*: Regenerate.
1099
1100 2019-10-01  Jonathan Wakely  <jwakely@redhat.com>
1101
1102         * include/experimental/algorithm (experimental::sample): Qualify call
1103         to __sample correctly.
1104         * include/parallel/algo.h (sample, for_each_n): Add using-declarations
1105         for algorithms that don't have parallel implementations.
1106
1107         * include/parallel/algobase.h (equal, lexicographical_compare): Add
1108         _GLIBCXX20_CONSTEXPR and dispatch to sequential algorithm when being
1109         constant evaluated.
1110         * include/parallel/algorithmfwd.h (equal, lexicographical_compare):
1111         Add _GLIBCXX20_CONSTEXPR.
1112
1113         * testsuite/17_intro/using_namespace_std_tr1_neg.cc: Skip test for
1114         parallel mode.
1115         * testsuite/20_util/hash/84998.cc: Likewise.
1116         * testsuite/23_containers/deque/types/pmr_typedefs_debug.cc: Likewise.
1117         * testsuite/23_containers/forward_list/pmr_typedefs_debug.cc: Likewise.
1118         * testsuite/23_containers/list/pmr_typedefs_debug.cc: Likewise.
1119         * testsuite/23_containers/map/pmr_typedefs_debug.cc: Likewise.
1120         * testsuite/23_containers/multimap/pmr_typedefs_debug.cc: Likewise.
1121         * testsuite/23_containers/multiset/pmr_typedefs_debug.cc: Likewise.
1122         * testsuite/23_containers/set/pmr_typedefs_debug.cc: Likewise.
1123         * testsuite/23_containers/unordered_map/pmr_typedefs_debug.cc:
1124         Likewise.
1125         * testsuite/23_containers/unordered_multimap/pmr_typedefs_debug.cc:
1126         Likewise.
1127         * testsuite/23_containers/unordered_multiset/pmr_typedefs_debug.cc:
1128         Likewise.
1129         * testsuite/23_containers/unordered_set/pmr_typedefs_debug.cc:
1130         Likewise.
1131         * testsuite/23_containers/vector/cons/destructible_debug_neg.cc:
1132         Likewise.
1133         * testsuite/23_containers/vector/types/pmr_typedefs_debug.cc: Likewise.
1134         * testsuite/25_algorithms/binary_search/partitioned.cc: Likewise.
1135         * testsuite/25_algorithms/copy/86658.cc: Likewise.
1136         * testsuite/25_algorithms/equal_range/partitioned.cc: Likewise.
1137         * testsuite/25_algorithms/lexicographical_compare/71545.cc: Likewise.
1138         * testsuite/25_algorithms/lower_bound/partitioned.cc: Likewise.
1139         * testsuite/25_algorithms/upper_bound/partitioned.cc: Likewise.
1140
1141         * include/parallel/algo.h: Replace non-reserved names.
1142         * include/parallel/multiway_merge.h: Likewise.
1143         * include/parallel/multiway_mergesort.h: Likewise.
1144         * include/parallel/numericfwd.h: Likewise.
1145         * testsuite/17_intro/names.cc: Add RAI to test macros.
1146
1147 2019-09-30  François Dumont  <fdumont@gcc.gnu.org>
1148
1149         * include/debug/array: Add C++20 constexpr to comparison operators.
1150         * testsuite/23_containers/array/tuple_interface/get_debug_neg.cc: Adapt
1151         dg-error line numbers.
1152         * testsuite/23_containers/array/tuple_interface/
1153         tuple_element_debug_neg.cc: Likewise.
1154
1155 2019-09-30  Andreas Tobler  <andreast@gcc.gnu.org>
1156
1157         * include/experimental/internet: Include netinet/in.h if we have
1158         _GLIBCXX_HAVE_NETINET_IN_H defined.
1159
1160         * testsuite/ext/special_functions/airy_ai/check_nan.cc: Ignore the
1161         FreeBSD warning about lower advertised precision of tgammal.
1162         * testsuite/ext/special_functions/airy_bi/check_nan.cc: Likewise.
1163         * testsuite/special_functions/07_cyl_bessel_i/check_nan.cc: Likewise.
1164         * testsuite/special_functions/08_cyl_bessel_j/check_nan.cc: Likewise.
1165         * testsuite/special_functions/09_cyl_bessel_k/check_nan.cc: Likewise.
1166         * testsuite/special_functions/10_cyl_neumann/check_nan.cc: Likewise.
1167         * testsuite/special_functions/19_sph_bessel/check_nan.cc: Likewise.
1168         * testsuite/special_functions/21_sph_neumann/check_nan.cc: Likewise.
1169         * testsuite/tr1/5_numerical_facilities/special_functions/
1170         08_cyl_bessel_i/check_nan.cc: Likewise.
1171         * testsuite/tr1/5_numerical_facilities/special_functions/
1172         09_cyl_bessel_j/check_nan.cc: Likewise.
1173         * testuite/tr1/5_numerical_facilities/special_functions/
1174         10_cyl_bessel_k/check_nan.cc: Likewise.
1175         * testsuite/tr1/5_numerical_facilities/special_functions/
1176         11_cyl_neumann/check_nan.cc: Likewise.
1177         * testsuite/tr1/5_numerical_facilities/special_functions/
1178         21_sph_bessel/check_nan.cc: Likewise.
1179         * testsuite/tr1/5_numerical_facilities/special_functions/
1180         23_sph_neumann/check_nan.cc: Likewise.
1181
1182 2019-09-30  Jonathan Wakely  <jwakely@redhat.com>
1183
1184         * include/std/span (span(element_type(&)[N]))
1185         (span(array<value_type, N>&), span(const array<value_type, N>&)):
1186         Deduce array element type to allow safe const conversions (LWG 3255).
1187         [!_GLIBCXX_P1394] (span(Container&), span(const Container&)): Use
1188         remove_cv_t on arguments to __is_std_span and __is_std_array.
1189         * testsuite/23_containers/span/lwg3255.cc: New test.
1190
1191         PR libstdc++/77936
1192         * include/parallel/checkers.h (__is_sorted): Remove unused variable.
1193
1194 2019-09-28  François Dumont  <fdumont@gcc.gnu.org>
1195
1196         * include/bits/stl_algo.h (merge): Fix documentation.
1197         * include/debug/functions.h (__check_sorted_aux): Add C++20 constexpr.
1198         (__check_sorted): Likewise and remove nested irreflexive check.
1199         (__check_sorted_set_aux, __check_sorted_set): Add C++20 constexpr.
1200         (__check_partitioned_lower, __check_partitioned_upper): Likewise.
1201         (_Irreflexive_checker::_S_is_valid): Likewise.
1202         (__is_irreflexive, __is_irreflexive_pred): Likewise.
1203         * include/debug/helper_functions.h (__get_distance): Add constexpr.
1204         (__valid_range_aux): Add C++20 constexpr.
1205         (__valid_range(_Iter, _Iter, _Distance_traits<_Iter>::__type&)):
1206         Likewise and add std::is_constant_evaluated check.
1207         (__valid_range_aux(_Iter, _Iter, std::input_iterator_tag)): New.
1208         (__valid_range_aux(_Iter, _Iter, std::random_accss_iterator_tag)): New.
1209         (__valid_range_aux(_Integral, _Integral, std::__true_type)): New,
1210         use latter.
1211         (__valid_range(_Iter, _Iter)): Adapt to use latter, add constexpr and
1212         __builtin_is_contant_evaludated check..
1213         (__can_advance, __base): Add constexpr.
1214         * include/debug/macros.h [_GLIBCXX_HAVE_BUILTIN_IS_CONSTANT_EVALUATED]
1215         (_GLIBCXX_DEBUG_VERIFY_COND_AT): New.
1216         (__glibcxx_check_sorted): Use __glibcxx_check_irreflexive.
1217         (__glibcxx_check_sorted_pred): Use __glibcxx_check_irreflexive_pred.
1218         * testsuite/25_algorithms/binary_search/constexpr.cc: Use irreflexive
1219         std::less.
1220         * testsuite/25_algorithms/is_sorted/constexpr.cc: Likewise.
1221         * testsuite/25_algorithms/merge/constexpr.cc: Fix order in camm. Fix
1222         lambda to be irreflexive.
1223
1224 2019-09-27  Maciej W. Rozycki  <macro@wdc.com>
1225
1226         * configure: Regenerate.
1227
1228 2019-09-27  Jonathan Wakely  <jwakely@redhat.com>
1229
1230         PR libstdc++/91910
1231         * src/c++11/debug.cc (_Safe_iterator_base::_M_detach()): Load pointer
1232         atomically and lock the mutex before accessing the sequence.
1233         (_Safe_local_iterator_base::_M_detach()): Likewise.
1234         (_Safe_iterator_base::_M_reset()): Clear _M_sequence atomically.
1235
1236 2019-09-26  Jonathan Wakely  <jwakely@redhat.com>
1237
1238         * include/debug/array (to_array): Define for debug mode.
1239
1240         * include/bits/stl_pair.h (pair): Add _GLIBCXX20_CONSTEXPR to
1241         piecewise construction constructor, assignment operators, and swap.
1242         * include/std/tuple (pair::pair(piecewise_construct_t, tuple, tuple)):
1243         Add _GLIBCXX20_CONSTEXPR.
1244         (pair::pair(tuple, tuple, _Index_tuple, _Index_tuple)): Likewise.
1245         * testsuite/20_util/pair/constexpr_assign.cc: New test.
1246         * testsuite/20_util/pair/constexpr_swap.cc: New test.
1247
1248         * include/experimental/internet (operator==, operator<): Fix loop
1249         condition to avoid reading past the end of the array.
1250
1251         * include/std/array: Remove references to profile mode.
1252         * include/std/bitset: Likewise.
1253         * include/std/deque: Likewise.
1254         * include/std/forward_list: Likewise.
1255         * include/std/list: Likewise.
1256         * include/std/map: Likewise.
1257         * include/std/set: Likewise.
1258         * include/std/unordered_map: Likewise.
1259         * include/std/unordered_set: Likewise.
1260         * include/std/vector: Likewise.
1261         * testsuite/17_intro/headers/c++1998/profile_mode.cc: New test.
1262         * testsuite/17_intro/headers/c++2011/profile_mode.cc: New test.
1263
1264 2019-09-25  Jonathan Wakely  <jwakely@redhat.com>
1265
1266         * include/bits/regex.h
1267         (basic_regex::assign(const C*, size_t, flag_type)): Add default
1268         argument (LWG 3296).
1269         * testsuite/28_regex/basic_regex/assign/char/lwg3296.cc: New test.
1270         * testsuite/28_regex/basic_regex/assign/wchar_t/lwg3296.cc: New test.
1271
1272 2019-09-24  Jonathan Wakely  <jwakely@redhat.com>
1273
1274         * include/std/variant (variant::index()): Remove impossible case.
1275
1276         PR libstdc++/91871
1277         * testsuite/util/testsuite_hooks.h
1278         (conversion::iterator_to_const_iterator()): Do not return an invalid
1279         iterator. Test direct-initialization and direct-list-initialization
1280         as well as implicit conversion.
1281
1282 2019-09-23  Jonathan Wakely  <jwakely@redhat.com>
1283
1284         PR libstdc++/91788 (partial)
1285         * include/std/variant (variant::index()): Improve codegen for cases
1286         where conversion to size_t already works correctly.
1287
1288 2019-09-23  Andreas Schwab  <schwab@suse.de>
1289
1290         * config/abi/post/riscv64-linux-gnu/baseline_symbols.txt: Update.
1291
1292 2019-09-12  Jonathan Wakely  <jwakely@redhat.com>
1293
1294         PR libstdc++/91748
1295         * include/bits/stl_algo.h (for_each_n): Fix random access iterator
1296         case.
1297         * testsuite/25_algorithms/for_each/for_each_n.cc: Test with random
1298         access iterators.
1299
1300 2019-09-11  Jonathan Wakely  <jwakely@redhat.com>
1301
1302         * python/libstdcxx/v6/xmethods.py (SharedPtrUseCountWorker.__call__):
1303         Fix syntax error.
1304
1305         * testsuite/20_util/result_of/sfinae_friendly_1.cc: Add -Wno-volatile
1306         for C++2a and up. Define HAS_52748_FIXED and fix incorrect tests.
1307         * testsuite/tr1/3_function_objects/result_of.cc: Add -Wno-volatile
1308         for C++2a and up.
1309
1310 2019-09-10  Jonathan Wakely  <jwakely@redhat.com>
1311
1312         * include/std/type_traits (__do_common_type_impl): Implement
1313         additional COND-RES(CREF(D1), CRED(D2)) condition for C++20.
1314         (basic_common_reference, common_reference, common_reference_t): Define
1315         for C++20.
1316         * testsuite/20_util/common_reference/requirements/alias_decl.cc: New
1317         test.
1318         * testsuite/20_util/common_reference/requirements/
1319         explicit_instantiation.cc: New test.
1320         * testsuite/20_util/common_reference/requirements/typedefs.cc: New
1321         test.
1322
1323         * include/std/charconv (to_chars): Rename to __to_chars_i. Define
1324         non-template overloads for each signed and unsigned integer type and
1325         char. Define deleted overload for bool (LWG 3266).
1326         * testsuite/20_util/to_chars/1_neg.cc: Remove.
1327         * testsuite/20_util/to_chars/3.cc: New test.
1328         * testsuite/20_util/to_chars/lwg3266.cc: New test.
1329
1330 2019-09-10  Christophe Lyon  <christophe.lyon@st.com>
1331
1332         * acinclude.m4: Handle uclinux*.
1333         * configure: Regenerate.
1334         * configure.host: Handle uclinux*
1335
1336 2019-09-10  Christophe Lyon  <christophe.lyon@st.com>
1337         Mickaël Guêné <mickael.guene@st.com>
1338
1339         * libsupc++/eh_personality.cc (get_ttype_entry): Add FDPIC
1340         support.
1341
1342 2019-09-10  Jonathan Wakely  <jwakely@redhat.com>
1343
1344         PR libstdc++/91711
1345         * testsuite/23_containers/span/get_neg.cc: Avoid ambiguity due to
1346         0ul being a valid null pointer constant.
1347
1348         * include/std/type_traits (__remove_cv_t): New alias template.
1349         (is_void, is_integral, is_floating_point, is_pointer)
1350         (is_member_object_pointer, is_member_function_pointer, is_null_pointer)
1351         (is_member_point), __is_signed_integer, __is_unsigned_integer)
1352         (__make_unsigned_selector, __make_signed_selector, remove_pointer)
1353         (__decay_selector): Use __remove_cv_t.
1354         (remove_cv): Add partial specializations for cv-qualified types.
1355         (__decay_t): New alias template.
1356         (__decay_and_strip, __common_type_impl, __result_of_impl): Use
1357         __decay_t.
1358         (__enable_if_t): Move earlier in the file.
1359         (_Require): Use __enable_if_t.
1360         (swap(T&, T&)): Use _Require.
1361         (swap(T(&)[N])): Use __enable_if_t.
1362
1363 2019-09-09  Edward Smith-Rowland  <3dw4rd@verizon.net>
1364
1365         Implement C++20 p1424 - 'constexpr' feature macro concerns,
1366         Issue 3256 - Feature testing macro for constexpr algorithms,
1367         and Issue 3257 - Missing feature testing macro update from P0858.
1368         * include/std/version (__cpp_lib_constexpr_algorithms): Bump value.
1369         * include/bits/algorithmfwd.h: Ditto.
1370         * include/std/utility: Ditto.
1371         * testsuite/25_algorithms/constexpr_macro.cc: Ditto.
1372         * testsuite/25_algorithms/cpp_lib_constexpr.cc: New check for
1373         __cpp_lib_constexpr macro in <algorith>.
1374         * testsuite/20_util/exchange/constexpr.cc: Add check for
1375         __cpp_lib_constexpr macro in <utility>.
1376         * testsuite/25_algorithms/adjacent_find/constexpr.cc: Remove check for
1377         __cpp_lib_constexpr_algorithms.
1378         * testsuite/25_algorithms/all_of/constexpr.cc: Ditto.
1379         * testsuite/25_algorithms/any_of/constexpr.cc: Ditto.
1380         * testsuite/25_algorithms/binary_search/constexpr.cc: Ditto.
1381         * testsuite/25_algorithms/copy/constexpr.cc: Ditto.
1382         * testsuite/25_algorithms/copy_backward/constexpr.cc: Ditto.
1383         * testsuite/25_algorithms/copy_if/constexpr.cc: Ditto.
1384         * testsuite/25_algorithms/copy_n/constexpr.cc: Ditto.
1385         * testsuite/25_algorithms/count/constexpr.cc: Ditto.
1386         * testsuite/25_algorithms/count_if/constexpr.cc: Ditto.
1387         * testsuite/25_algorithms/equal/constexpr.cc: Ditto.
1388         * testsuite/25_algorithms/equal_range/constexpr.cc: Ditto.
1389         * testsuite/25_algorithms/fill/constexpr.cc: Ditto.
1390         * testsuite/25_algorithms/fill_n/constexpr.cc: Ditto.
1391         * testsuite/25_algorithms/find/constexpr.cc: Ditto.
1392         * testsuite/25_algorithms/find_end/constexpr.cc: Ditto.
1393         * testsuite/25_algorithms/find_first_of/constexpr.cc: Ditto.
1394         * testsuite/25_algorithms/find_if/constexpr.cc: Ditto.
1395         * testsuite/25_algorithms/find_if_not/constexpr.cc: Ditto.
1396         * testsuite/25_algorithms/for_each/constexpr.cc: Ditto.
1397         * testsuite/25_algorithms/generate/constexpr.cc: Ditto.
1398         * testsuite/25_algorithms/generate_n/constexpr.cc: Ditto.
1399         * testsuite/25_algorithms/is_heap/constexpr.cc: Ditto.
1400         * testsuite/25_algorithms/is_heap_until/constexpr.cc: Ditto.
1401         * testsuite/25_algorithms/is_partitioned/constexpr.cc: Ditto.
1402         * testsuite/25_algorithms/is_permutation/constexpr.cc: Ditto.
1403         * testsuite/25_algorithms/is_sorted/constexpr.cc: Ditto.
1404         * testsuite/25_algorithms/is_sorted_until/constexpr.cc: Ditto.
1405         * testsuite/25_algorithms/lexicographical_compare/constexpr.cc: Ditto.
1406         * testsuite/25_algorithms/lower_bound/constexpr.cc: Ditto.
1407         * testsuite/25_algorithms/merge/constexpr.cc: Ditto.
1408         * testsuite/25_algorithms/mismatch/constexpr.cc: Ditto.
1409         * testsuite/25_algorithms/none_of/constexpr.cc: Ditto.
1410         * testsuite/25_algorithms/partition_copy/constexpr.cc: Ditto.
1411         * testsuite/25_algorithms/partition_point/constexpr.cc: Ditto.
1412         * testsuite/25_algorithms/remove/constexpr.cc: Ditto.
1413         * testsuite/25_algorithms/remove_copy/constexpr.cc: Ditto.
1414         * testsuite/25_algorithms/remove_copy_if/constexpr.cc: Ditto.
1415         * testsuite/25_algorithms/remove_if/constexpr.cc: Ditto.
1416         * testsuite/25_algorithms/replace_copy/constexpr.cc: Ditto.
1417         * testsuite/25_algorithms/replace_copy_if/constexpr.cc: Ditto.
1418         * testsuite/25_algorithms/replace_if/constexpr.cc: Ditto.
1419         * testsuite/25_algorithms/reverse_copy/constexpr.cc: Ditto.
1420         * testsuite/25_algorithms/rotate_copy/constexpr.cc: Ditto.
1421         * testsuite/25_algorithms/search/constexpr.cc: Ditto.
1422         * testsuite/25_algorithms/search_n/constexpr.cc: Ditto.
1423         * testsuite/25_algorithms/set_difference/constexpr.cc: Ditto.
1424         * testsuite/25_algorithms/set_intersection/constexpr.cc: Ditto.
1425         * testsuite/25_algorithms/set_symmetric_difference/constexpr.cc: Ditto.
1426         * testsuite/25_algorithms/set_union/constexpr.cc: Ditto.
1427         * testsuite/25_algorithms/transform/constexpr.cc: Ditto.
1428         * testsuite/25_algorithms/unique/constexpr.cc: Ditto.
1429         * testsuite/25_algorithms/unique_copy/constexpr.cc: Ditto.
1430         * testsuite/25_algorithms/upper_bound/constexpr.cc: Ditto.
1431
1432 2019-09-09  Edward Smith-Rowland  <3dw4rd@verizon.net>
1433
1434         Update docs for recent <span> and constexpr lib changes.
1435         * doc/xml/manual/status_cxx2020.xml: Update p0202r3, p0858r0, p0879r0,
1436         p1023r0, p1085r2 status.
1437         * doc/html/manual/status.html: Regenerate.
1438
1439 2019-09-09  Antony Polukhin  <antoshkka@gmail.com>
1440
1441         * include/bits/charconv.h (__detail::__to_chars_10_impl): Replace
1442         final offsets with constants.
1443
1444 2019-09-09  Jonathan Wakely  <jwakely@redhat.com>
1445
1446         * include/bits/range_access.h (__adl_to_address): Remove.
1447         * include/std/span (__is_base_derived_safe_convertible_v): Replace
1448         with span::__is_compatible.
1449         (__is_std_array_v): Replace with __is_std_array class template and
1450         partial specializations.
1451         (__is_std_array, __is_std_span): New class templates and partial
1452         specializations.
1453         (span::__is_compatible): New alias template for SFINAE constraints.
1454         (span::span(element_type (&)[N])): Remove redundant constraints. Do
1455         not use __adl_data to obtain a pointer.
1456         (span::span(array<value_type, N>&)): Likewise.
1457         (span::span(const array<value_type, N>&)): Likewise.
1458         [_GLIBCXX_P1394] (span::iter_reference_t, span::iterator_t)
1459         (span::iter_value_t, span::derived_from): New alias templates for
1460         SFINAE constraints, until the equivalents are supported in <concepts>
1461         and <iterator>.
1462         [_GLIBCXX_P1394] (span::__is_compatible_iterator): New alias template
1463         for SFINAE constraints.
1464         [_GLIBCXX_P1394] (span::is_compatible_range): New class template for
1465         SFINAE constraints.
1466         [_GLIBCXX_P1394] (span::span(Range&&)): Improve constraints.
1467         [_GLIBCXX_P1394] (span::span(ContiguousIterator, Sentinel)): Likewise.
1468         Use std::to_address instead of __adl_to_address.
1469         [_GLIBCXX_P1394] (span::span(ContiguousIterator, size_type)): Likewise.
1470         [!_GLIBCXX_P1394] (span::__is_compatible_container): New alias
1471         template for SFINAE constraints.
1472         [!_GLIBCXX_P1394] (span::span(Container&))
1473         (span::span(const Container&)): Improve constraints.
1474         [!_GLIBCXX_P1394] (span::span(pointer, size_type))
1475         (span::span(pointer, pointer)): Remove redundant cast of pointer.
1476         (span(const span<OType, OExtent>&)): New constructor.
1477
1478 2019-09-06  Jonathan Wakely  <jwakely@redhat.com>
1479
1480         * include/bits/range_access.h (ssize): Define for C++20.
1481         * testsuite/24_iterators/range_access_cpp20.cc: New test.
1482         * doc/xml/manual/status_cxx2020.xml: Update P1227R2 status.
1483         * doc/html/*: Regenerate.
1484
1485 2019-09-06  Florian Weimer  <fweimer@redhat.com>
1486
1487         * configure: Regenerate.
1488
1489 2019-09-05  Jonathan Wakely  <jwakely@redhat.com>
1490
1491         * doc/xml/manual/status_cxx2020.xml: Update status for P0122R7 and
1492         P1024R3. Remove entry for P0920R2.
1493         * include/std/span  (__cpp_lib_span): Change value.
1494         (__extent_storage, __extent_storage<dynamic_extent>): Remove default
1495         constructor.
1496         (span): Replace __extent_storage base class with data member.
1497         (span::_S_subspan_extent): New function.
1498         (span::empty()): Add nodiscard attribute.
1499         (span::front, span::back, span::operator[]): Check preconditions.
1500         (span::first, span::last, span::subspan): Add noexcept. Improve
1501         precondition checks (LWG 3103).
1502         (get): Remove redundant condition from static_assert.
1503         (tuple_element<I, span<T, E>>): Fix static_assert message and simplify.
1504         (as_writable_bytes): Add inline specifier.
1505         * include/std/version (__cpp_lib_span): Change value.
1506         * testsuite/23_containers/span/back_neg.cc: Remove stray semi-colon.
1507         * testsuite/23_containers/span/front_neg.cc: Likewise.
1508         * testsuite/23_containers/span/index_op_neg.cc: Likewise.
1509         * testsuite/23_containers/span/last_neg.cc: Improve test.
1510         * testsuite/23_containers/span/subspan_neg.cc: Likewise.
1511         * testsuite/23_containers/span/1.cc: New test.
1512         * testsuite/23_containers/span/2.cc: New test.
1513         * testsuite/23_containers/span/back_assert_neg.cc: New test.
1514         * testsuite/23_containers/span/first_2_assert_neg.cc: New test.
1515         * testsuite/23_containers/span/first_assert_neg.cc: New test.
1516         * testsuite/23_containers/span/first_neg.cc: New test.
1517         * testsuite/23_containers/span/front_assert_neg.cc: New test.
1518         * testsuite/23_containers/span/index_op_assert_neg.cc: New test.
1519         * testsuite/23_containers/span/last_2_assert_neg.cc: New test.
1520         * testsuite/23_containers/span/last_assert_neg.cc: New test.
1521         * testsuite/23_containers/span/subspan_2_assert_neg.cc: New test.
1522         * testsuite/23_containers/span/subspan_3_assert_neg.cc: New test.
1523         * testsuite/23_containers/span/subspan_4_assert_neg.cc: New test.
1524         * testsuite/23_containers/span/subspan_5_assert_neg.cc: New test.
1525         * testsuite/23_containers/span/subspan_6_assert_neg.cc: New test.
1526         * testsuite/23_containers/span/subspan_assert_neg.cc: New test.
1527
1528 2019-09-05  JeanHeyd Meneide  <phdofthehouse@gmail.com>
1529
1530         * include/Makefile.am: Add <span> header.
1531         * include/Makefile.in: Regenerate.
1532         * include/bits/range_access.h (__adl_begin, __adl_end, __adl_cbegin)
1533         (__adl_cend, __adl_rbegin, __adl_rend, __adl_crbegin, __adl_crend)
1534         (__adl_data, __adl_cdata, __adl_size, __adl_empty, __adl_to_address):
1535         New functions for performing argument-dependent lookup of range
1536         customization points.
1537         * include/bits/stl_iterator.h (__normal_iterator): Add
1538         _GLIBCXX20_CONSTEXPR to all functions.
1539         * include/std/span: New header.
1540         * include/std/version (__cpp_lib_span): Define feature test macro.
1541         * testsuite/23_containers/span/contiguous_range_neg.cc: New test.
1542         * testsuite/23_containers/span/everything.cc: New test.
1543         * testsuite/23_containers/span/get_neg.cc: New test.
1544         * testsuite/23_containers/span/last_neg.cc: New test.
1545         * testsuite/23_containers/span/subspan_neg.cc: New test.
1546         * testsuite/23_containers/span/tuple_element_dynamic_neg.cc: New test.
1547         * testsuite/23_containers/span/tuple_element_oob_neg.cc: New test.
1548         * testsuite/23_containers/span/tuple_size_neg.cc: New test.
1549
1550 2019-09-05  Jonathan Wakely  <jwakely@redhat.com>
1551
1552         * doc/xml/manual/allocator.xml: Remove URL for bibliography entry.
1553         * doc/html/*: Regenerate.
1554
1555 2019-09-04  Mike Crowe  <mac@mcrowe.com>
1556
1557         PR libstdc++/41861
1558         * acinclude.m4 (GLIBCXX_CHECK_PTHREAD_COND_CLOCKWAIT): Check for new
1559         pthread_cond_clockwait function.
1560         * configure.ac: Use GLIBCXX_CHECK_PTHREAD_COND_CLOCKWAIT.
1561         * configure: Regenerate.
1562         * config.h.in: Regenerate.
1563         * include/std/condition_variable: (condition_variable): Rename
1564         __steady_clock_t typedef and add system_clock. Change __clock_t to be
1565         a typedef for the preferred clock to convert arbitrary other clocks to.
1566         [_GLIBCXX_USE_PTHREAD_COND_CLOCKWAIT] (wait_until): Add a steady_clock
1567         overload.
1568         (wait_until): Change __clock_t overload to use system_clock.
1569         [_GLIBCXX_USE_PTHREAD_COND_CLOCKWAIT] (__wait_until_impl): Add
1570         steady_clock overload that calls pthread_cond_clockwait.
1571         (__wait_until_impl): Change __clock_t overload to use system_clock.
1572         (condition_variable_any) [_GLIBCXX_USE_PTHREAD_COND_CLOCKWAIT]: Use
1573         steady_clock for __clock_t if pthread_cond_clockwait is available.
1574
1575 2019-09-04  Mike Crowe  <mac@mcrowe.com>
1576
1577         * testsuite/30_threads/condition_variable/members/2.cc (test01):
1578         Parameterise so that test can be run against an arbitrary clock.
1579         (main): Test using std::chrono::steady_clock and a user-defined
1580         clock in addition to the previous std::chrono::system_clock.
1581         * testsuite/30_threads/condition_variable_any/members/2.cc: Likewise.
1582
1583 2019-09-03  Ulrich Weigand  <uweigand@de.ibm.com>
1584
1585         * crossconfig.m4: Remove references to spu.
1586         * configure: Regenerate.
1587         * doc/xml/manual/appendix_contributing.xml: Remove references
1588         to __ea as "badword" for spu.
1589         * doc/html/manual/source_code_style.html: Regenerate.
1590         * include/tr1/ell_integral.tcc (__ellint_rd): Do not attempt
1591         to avoid __ea (as "badword" for spu).
1592         (__ellint_rj): Likewise.
1593
1594 2019-09-03  Chung-Lin Tang  <cltang@codesourcery.com>
1595
1596         PR other/79543
1597         * acinclude.m4 (GLIBCXX_CHECK_LINKER_FEATURES): Fix GNU ld --version
1598         scanning to conform to the GNU Coding Standards.
1599         * configure: Regenerate.
1600
1601 2019-09-02  Jonathan Wakely  <jwakely@redhat.com>
1602
1603         * src/c++17/memory_resource.cc: Use __constinit keyword.
1604
1605 2019-09-02  Jonathan Wakely  <jwakely@redhat.com>
1606
1607         * doc/xml/manual/abi.xml: Document 9.x library versions.
1608         * doc/html/*: Regenerate.
1609
1610 2019-09-02  Jonathan Wakely  <jwakely@redhat.com>
1611
1612         * include/std/charconv (__detail::__to_chars_2_len): Use std::log2p1.
1613         (__detail::__to_chars_8_len): Remove.
1614         (__detail::__to_chars_8): Inline length calculation here.
1615         (__detail::__from_chars_binary): Use numeric_limits instead of
1616         CHAR_BIT.
1617
1618 2019-09-02  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
1619
1620         * config/abi/post/i386-solaris/baseline_symbols.txt: Regenerate.
1621         * config/abi/post/i386-solaris/amd64/baseline_symbols.txt: Likewise.
1622         * config/abi/post/sparc-solaris/baseline_symbols.txt: Likewise.
1623         * config/abi/post/sparc-solaris/sparcv9/baseline_symbols.txt:
1624         Likewise.
1625
1626 2019-09-01  François Dumont  <fdumont@gcc.gnu.org>
1627
1628         * testsuite_files/util/testsuite_performance.h
1629         (resource_counter::start): Ignore unused malloc(0) result.
1630
1631 2019-09-01  Gerald Pfeifer  <gerald@pfeifer.com>
1632
1633         * doc/xml/manual/policy_data_structures_biblio.xml (COM: Component
1634         Model Object Technologies): Adjust name and link.
1635
1636 2019-08-30  Antony Polukhin  <antoshkka@gmail.com>
1637
1638         * include/std/charconv (__detail::__to_chars_8)
1639         __detail::__to_chars_16): Replace array of precomputed digits with
1640         arithmetic operations to avoid CPU cache misses. Remove zero
1641         termination from array of digits to allow symbol merge with generic
1642         implementation of __detail::__to_chars. Replace final offsets with
1643         constants. Use __detail::__to_chars_len_2 instead of a generic
1644         __detail::__to_chars_len.
1645         (__detail::__to_chars): Remove zero termination from array of digits.
1646         (__detail::__to_chars_2): Leading digit is always '1'.
1647
1648 2019-08-30  Jonathan Wakely  <jwakely@redhat.com>
1649
1650         * testsuite/23_containers/vector/cons/89164_c++17.cc: Fix errors.
1651
1652 2019-08-30  Uros Bizjak  <ubizjak@gmail.com>
1653
1654         * config/abi/post/alpha-linux-gnu/baseline_symbols.txt: Update.
1655
1656 2019-08-30  Jonathan Wakely  <jwakely@redhat.com>
1657
1658         PR libstdc++/89164
1659         * include/bits/stl_algobase.h (__copy_move): Give descriptive names
1660         to template parameters.
1661         * include/bits/stl_uninitialized.h (uninitialized_copy)
1662         (uninitialized_fill, uninitialized_fill_n): Add static assertions to
1663         diagnose invalid uses.
1664         * testsuite/20_util/specialized_algorithms/uninitialized_copy/1.cc:
1665         Adjust expected error.
1666         * testsuite/20_util/specialized_algorithms/uninitialized_copy/89164.cc:
1667         New test.
1668         * testsuite/20_util/specialized_algorithms/uninitialized_copy_n/
1669         89164.cc: New test.
1670         * testsuite/20_util/specialized_algorithms/uninitialized_fill/89164.cc:
1671         New test.
1672         * testsuite/20_util/specialized_algorithms/uninitialized_fill_n/
1673         89164.cc: New test.
1674         * testsuite/23_containers/vector/cons/89164.cc: New test.
1675         * testsuite/23_containers/vector/cons/89164_c++17.cc: New test.
1676
1677 2019-08-29  Jonathan Wakely  <jwakely@redhat.com>
1678
1679         PR libstdc++/91067
1680         * acinclude.m4 (libtool_VERSION): Bump to 6:28:0.
1681         * configure: Regenerate.
1682         * config/abi/pre/gnu.ver (GLIBCXX_3.4.28): Add new version. Export
1683         missing symbols.
1684         * testsuite/27_io/filesystem/iterators/91067.cc: Test move
1685         constructors.
1686         * testsuite/util/testsuite_abi.cc: Add new symbol version.
1687
1688 2019-08-29  Jakub Jelinek  <jakub@redhat.com>
1689
1690         * config/abi/post/aarch64-linux-gnu/baseline_symbols.txt: Update.
1691         * config/abi/post/s390x-linux-gnu/baseline_symbols.txt: Update.
1692
1693 2019-08-28  Jonathan Wakely  <jwakely@redhat.com>
1694
1695         * config/abi/post/i386-linux-gnu/baseline_symbols.txt: Update.
1696         * config/abi/post/i486-linux-gnu/baseline_symbols.txt: Update.
1697         * config/abi/post/powerpc-linux-gnu/baseline_symbols.txt: Update.
1698         * config/abi/post/powerpc64-linux-gnu/32/baseline_symbols.txt: Update.
1699         * config/abi/post/powerpc64-linux-gnu/baseline_symbols.txt: Update.
1700         * config/abi/post/x86_64-linux-gnu/32/baseline_symbols.txt: Update.
1701         * config/abi/post/x86_64-linux-gnu/baseline_symbols.txt: Update.
1702
1703 2019-08-23  Joseph Myers  <joseph@codesourcery.com>
1704
1705         * src/filesystem/ops-common.h [_GLIBCXX_FILESYSTEM_IS_WINDOWS]
1706         (std::filesystem::__gnu_posix::lstat): Add return type.
1707
1708 2019-08-20  Jonathan Wakely  <jwakely@redhat.com>
1709
1710         * doc/doxygen/user.cfg.in (INPUT): Remove profile mode headers.
1711
1712         * include/std/numeric (reduce): Fix Doxygen markup.
1713
1714         PR libstdc++/91371
1715         * include/std/type_traits (is_function): Simplify definition. Remove
1716         partial specializations for function types.
1717         (__is_referenceable): Simplify definition.
1718         * testsuite/20_util/bind/91371.cc: New test.
1719         * testsuite/20_util/is_function/91371.cc: New test.
1720         * testsuite/20_util/is_function/value.cc: Check more pointer types.
1721         * testsuite/20_util/is_member_function_pointer/91371.cc: New test.
1722         * testsuite/20_util/is_object/91371.cc: New test.
1723
1724 2019-08-16  Uros Bizjak  <ubizjak@gmail.com>
1725
1726         * config/abi/post/alpha-linux-gnu/baseline_symbols.txt: Update.
1727
1728 2019-08-15  Jonathan Wakely  <jwakely@redhat.com>
1729
1730         PR libstdc++/91456
1731         * include/bits/std_function.h (__check_func_return_type): Remove.
1732         (function::_Callable): Use std::__is_invocable_impl instead of
1733         __check_func_return_type.
1734         * include/std/type_traits (__is_invocable_impl): Add another defaulted
1735         template parameter. Define a separate partial specialization for
1736         INVOKE and INVOKE<void>. For INVOKE<R> replace is_convertible check
1737         with a check that models delayed temporary materialization.
1738         * testsuite/20_util/function/91456.cc: New test.
1739         * testsuite/20_util/is_invocable/91456.cc: New test.
1740
1741 2019-08-14  Jonathan Wakely  <jwakely@redhat.com>
1742
1743         * include/std/type_traits (__is_nullptr_t): Add deprecated attribute.
1744
1745 2019-08-14  Edward Smith-Rowland  <3dw4rd@verizon.net>
1746
1747         Implement C++20 p0879 - Constexpr for swap and swap related functions.
1748         * include/std/version (__cpp_lib_constexpr_swap_algorithms): New macro.
1749         * include/bits/algorithmfwd.h (__cpp_lib_constexpr_swap_algorithms):
1750         New macro.
1751         (iter_swap, make_heap, next_permutation, partial_sort_copy, pop_heap)
1752         (prev_permutation, push_heap, reverse, rotate, sort_heap, swap)
1753         (swap_ranges, nth_element, partial_sort, sort): Add constexpr.
1754         * include/bits/move.h (swap): Add constexpr.
1755         * include/bits/stl_algo.h (__move_median_to_first, __reverse, reverse)
1756         (__gcd, __rotate, rotate, __partition, __heap_select)
1757         (__partial_sort_copy, partial_sort_copy, __unguarded_partition)
1758         (__unguarded_partition_pivot, __partial_sort, __introsort_loop, __sort)
1759         (__introselect, __chunk_insertion_sort, next_permutation)
1760         (prev_permutation, partition, partial_sort, nth_element, sort)
1761         (__iter_swap::iter_swap, iter_swap, swap_ranges): Add constexpr.
1762         * include/bits/stl_algobase.h (__iter_swap::iter_swap, iter_swap)
1763         (swap_ranges): Add constexpr.
1764         * include/bits/stl_heap.h (__push_heap, push_heap, __adjust_heap,
1765         __pop_heap, pop_heap, __make_heap, make_heap, __sort_heap, sort_heap):
1766         Add constexpr.
1767         * include/std/type_traits (swap): Add constexpr.
1768         * testsuite/25_algorithms/headers/algorithm/synopsis.cc: Add constexpr.
1769         * testsuite/25_algorithms/iter_swap/constexpr.cc: New test.
1770         * testsuite/25_algorithms/make_heap/constexpr.cc: New test.
1771         * testsuite/25_algorithms/next_permutation/constexpr.cc: New test.
1772         * testsuite/25_algorithms/nth_element/constexpr.cc: New test.
1773         * testsuite/25_algorithms/partial_sort/constexpr.cc: New test.
1774         * testsuite/25_algorithms/partial_sort_copy/constexpr.cc: New test.
1775         * testsuite/25_algorithms/partition/constexpr.cc: New test.
1776         * testsuite/25_algorithms/pop_heap/constexpr.cc: New test.
1777         * testsuite/25_algorithms/prev_permutation/constexpr.cc: New test.
1778         * testsuite/25_algorithms/push_heap/constexpr.cc: New test.
1779         * testsuite/25_algorithms/reverse/constexpr.cc: New test.
1780         * testsuite/25_algorithms/rotate/constexpr.cc: New test.
1781         * testsuite/25_algorithms/sort/constexpr.cc: New test.
1782         * testsuite/25_algorithms/sort_heap/constexpr.cc: New test.
1783         * testsuite/25_algorithms/swap/constexpr.cc: New test.
1784         * testsuite/25_algorithms/swap_ranges/constexpr.cc: New test.
1785
1786 2019-08-12  Jonathan Wakely  <jwakely@redhat.com>
1787
1788         PR libstdc++/90361
1789         * src/c++17/string-inst.cc: Use _GLIBCXX_USE_CXX11_ABI=1 by default.
1790
1791         * include/std/tuple (__unpack_std_tuple): New variable template and
1792         partial specializations.
1793         (apply, make_from_tuple): Add noexcept-specifier.
1794         * testsuite/20_util/tuple/apply/2.cc: New test.
1795         * testsuite/20_util/tuple/make_from_tuple/2.cc: New test.
1796
1797 2019-08-09  Corentin Gay  <gay@adacore.com>
1798
1799         * testsuite/ext/random/beta_distribution/operators/serialize.cc,
1800         testsuite/ext/random/hypergeometric_distribution/operators/serialize.cc,
1801         testsuite/ext/random/normal_mv_distribution/operators/serialize.cc,
1802         testsuite/ext/random/triangular_distribution/operators/serialize.cc,
1803         testsuite/ext/random/von_mises_distribution/operators/serialize.cc:
1804         Add call to `VERIFY`.
1805
1806 2019-08-09  Alexandre Oliva <oliva@adacore.com>
1807
1808         * include/ext/random
1809         (normal_mv_distribution::param_type::param_type): New private
1810         ctor taking a decomposed varcov matrix, for use by...
1811         (operator>>): ... this, befriended.
1812         * include/ext/random.tcc (operator>>): Use it.
1813         (normal_mv_distribution::param_type::_M_init_lower): Adjust
1814         member function name in exception message.
1815
1816 2019-08-08  Jonathan Wakely  <jwakely@redhat.com>
1817
1818         P0325R4 to_array from LFTS with updates
1819         * include/experimental/array (to_array): Qualify call to __to_array.
1820         * include/std/array (__cpp_lib_to_array, to_array): Define for C++20.
1821         * include/std/version (__cpp_lib_to_array): Likewise.
1822         * testsuite/23_containers/array/creation/1.cc: New test.
1823         * testsuite/23_containers/array/creation/2.cc: New test.
1824         * testsuite/23_containers/array/creation/3_neg.cc: New test.
1825         * testsuite/23_containers/array/tuple_interface/tuple_element_neg.cc:
1826         Use zero for dg-error line number.
1827
1828 2019-08-06  Jonathan Wakely  <jwakely@redhat.com>
1829
1830         P1651R0 bind_front should not unwrap reference_wrapper
1831         * include/std/functional (bind_front): Don't unwrap reference_wrapper.
1832         * include/std/version (__cpp_lib_bind_front): Update value.
1833         * testsuite/20_util/function_objects/bind_front/1.cc: Fix test for
1834         feature test macro.
1835         * testsuite/20_util/function_objects/bind_front/2.cc: New test.
1836
1837         * include/std/numbers [!__STRICT_ANSI__ && _GLIBCXX_USE_FLOAT128]
1838         (e_v, log2e_v, log10e_v, pi_v, inv_pi_v, inv_sqrtpi_v, ln2_v, ln10_v)
1839         (sqrt2_v, sqrt3_v, inv_sqrt3, egamma_v, phi_v): Add explicit
1840         specializations for __float128.
1841         * testsuite/26_numerics/numbers/float128.cc: New test.
1842
1843 2019-08-04  Gerald Pfeifer  <gerald@pfeifer.com>
1844
1845         * doc/xml/manual/documentation_hacking.xml: doxygen.org is now
1846         doxygen.nl.
1847
1848 2019-08-01  Edward Smith-Rowland  <3dw4rd@verizon.net>
1849
1850         Implement C++20 p0202 - Add Constexpr Modifiers to Functions
1851         in <algorithm> and <utility> Headers.
1852         Implement C++20 p1023 - constexpr comparison operators for std::array.
1853         * include/bits/algorithmfwd.h (all_of, any_of, binary_search, copy,
1854         copy_backward, copy_if, copy_n, equal_range, fill, find_end,
1855         find_if_not, includes, is_heap, is_heap_until, is_partitioned,
1856         is_permutation, is_sorted, is_sorted_until, iter_swap, lower_bound,
1857         none_of, partition_copy, partition_point, remove, remove_if,
1858         remove_copy, remove_copy_if, replace_copy, replace_copy_if,
1859         reverse_copy, rotate_copy, uunique, upper_bound, adjacent_find, count,
1860         count_if, equal, find, find_first_of, find_if, for_each, generate,
1861         generate_n, lexicographical_compare, merge, mismatch, replace,
1862         replace_if, search, search_n, set_difference, set_intersection,
1863         set_symmetric_difference, set_union, transform, unique_copy):
1864         Mark constexpr.
1865         * include/bits/cpp_type_traits.h (__miter_base): Mark constexpr.
1866         * include/bits/predefined_ops.h (_Iter_less_val::operator(),
1867         _Val_less_iter::operator(), _Iter_equal_to_iter::operator(),
1868         _Iter_equal_to_val::operator(), _Iter_equals_val::operator()):
1869          Use const ref instead of ref arg;
1870         (_Iter_less_val, __iter_less_val, _Val_less_iter, __val_less_iter,
1871         __iter_equal_to_iter, __iter_equal_to_val, __iter_comp_val,
1872         _Iter_comp_val, _Val_comp_iter, __val_comp_iter, __iter_equals_val,
1873         _Iter_equals_iter, __iter_comp_iter, _Iter_pred, __pred_iter,
1874         _Iter_comp_to_val, __iter_comp_val, _Iter_comp_to_iter,
1875         __iter_comp_iter): Mark constexpr.
1876         * include/bits/stl_algo.h (__find_if, __find_if_not, __find_if_not_n,
1877         __search, __search_n_aux, __search_n, __find_end, find_end, all_of,
1878         none_of, any_of, find_if_not, is_partitioned, partition_point,
1879         __remove_copy_if, remove_copy, remove_copy_if, copy_if, __copy_n,
1880         copy_n, partition_copy, __remove_if, remove, remove_if, __adjacent_find,
1881         __unique, unique, __unique_copy, reverse_copy, rotate_copy,
1882         __unguarded_linear_insert, __insertion_sort, __unguarded_insertion_sort,
1883         __final_insertion_sort, lower_bound, __upper_bound, upper_bound,
1884         __equal_range, equal_range, binary_search, __includes, includes,
1885         __next_permutation, __prev_permutation, __replace_copy_if, replace_copy,
1886         replace_copy_if, __count_if, is_sorted, __is_sorted_until,
1887         is_sorted_until, __is_permutation, is_permutation, for_each, find,
1888         find_if, find_first_of, adjacent_find, count, count_if, search,
1889         search_n, transform, replace, replace_if, generate, generate_n,
1890         unique_copy, __merge, merge, __set_union, set_union, __set_intersection,
1891         set_intersection, __set_difference, set_difference,
1892         __set_symmetric_difference, set_symmetric_difference):  Mark constexpr.
1893         * include/bits/stl_algobase.h (__memmove, __memcmp): New maybe constexpr
1894         wrappers around __builtin_memmove and __builtin_memcmp
1895         respectively;
1896         (__niter_base, __niter_wrap, __copy_m, __copy_move_a, __copy_move_a2,
1897         copy, move, __copy_move_b, __copy_move_backward_a,
1898         __copy_move_backward_a2, copy_backward, move_backward, __fill_a, fill,
1899         __fill_n_a, fill_n, equal, __lc_rai::__newlast1, __lc_rai::__cnd2,
1900         __lexicographical_compare_impl, __lexicographical_compare,
1901         __lexicographical_compare<true>::__lc, __lexicographical_compare_aux,
1902         __lower_bound, lower_bound, equal, __equal4, lexicographical_compare,
1903         __mismatch, mismatch, __is_heap_until, __is_heap, is_heap_until,
1904         is_heap): Mark constexpr.
1905         * include/bits/stl_heap.h (__is_heap_until, __is_heap, is_heap_until,
1906         is_heap): Mark constexpr.
1907         * include/bits/stl_iterator.h (__niter_base, __miter_base): Mark constexpr.
1908         * include/std/array: Make comparison ops constexpr.
1909         * include/std/utility: Make exchange constexpr.
1910         * include/std/version (__cpp_lib_constexpr_algorithms): New macro.
1911         * testsuite/23_containers/array/tuple_interface/get_neg.cc: Adjust.
1912         * testsuite/23_containers/array/tuple_interface/
1913         tuple_element_neg.cc: Adjust.
1914         * testsuite/20_util/exchange/constexpr.cc: New.
1915         * testsuite/23_containers/array/comparison_operators/constexpr.cc: New.
1916         * testsuite/25_algorithms/constexpr_macro.cc: New.
1917         * testsuite/25_algorithms/adjacent_find/constexpr.cc: New.
1918         * testsuite/25_algorithms/all_of/constexpr.cc: New.
1919         * testsuite/25_algorithms/any_of/constexpr.cc: New.
1920         * testsuite/25_algorithms/binary_search/constexpr.cc: New.
1921         * testsuite/25_algorithms/copy/constexpr.cc: New.
1922         * testsuite/25_algorithms/copy_backward/constexpr.cc: New.
1923         * testsuite/25_algorithms/copy_if/constexpr.cc: New.
1924         * testsuite/25_algorithms/copy_n/constexpr.cc: New.
1925         * testsuite/25_algorithms/count/constexpr.cc: New.
1926         * testsuite/25_algorithms/count_if/constexpr.cc: New.
1927         * testsuite/25_algorithms/equal/constexpr.cc: New.
1928         * testsuite/25_algorithms/equal_range/constexpr.cc: New.
1929         * testsuite/25_algorithms/fill/constexpr.cc: New.
1930         * testsuite/25_algorithms/fill_n/constexpr.cc: New.
1931         * testsuite/25_algorithms/find/constexpr.cc: New.
1932         * testsuite/25_algorithms/find_end/constexpr.cc: New.
1933         * testsuite/25_algorithms/find_first_of/constexpr.cc: New.
1934         * testsuite/25_algorithms/find_if/constexpr.cc: New.
1935         * testsuite/25_algorithms/find_if_not/constexpr.cc: New.
1936         * testsuite/25_algorithms/for_each/constexpr.cc: New.
1937         * testsuite/25_algorithms/generate/constexpr.cc: New.
1938         * testsuite/25_algorithms/generate_n/constexpr.cc: New.
1939         * testsuite/25_algorithms/is_heap/constexpr.cc: New.
1940         * testsuite/25_algorithms/is_heap_until/constexpr.cc: New.
1941         * testsuite/25_algorithms/is_partitioned/constexpr.cc: New.
1942         * testsuite/25_algorithms/is_permutation/constexpr.cc: New.
1943         * testsuite/25_algorithms/is_sorted/constexpr.cc: New.
1944         * testsuite/25_algorithms/is_sorted_until/constexpr.cc: New.
1945         * testsuite/25_algorithms/lexicographical_compare/constexpr.cc: New.
1946         * testsuite/25_algorithms/lower_bound/constexpr.cc: New.
1947         * testsuite/25_algorithms/merge/constexpr.cc: New.
1948         * testsuite/25_algorithms/mismatch/constexpr.cc: New.
1949         * testsuite/25_algorithms/none_of/constexpr.cc: New.
1950         * testsuite/25_algorithms/partition_copy/constexpr.cc: New.
1951         * testsuite/25_algorithms/partition_point/constexpr.cc: New.
1952         * testsuite/25_algorithms/remove/constexpr.cc: New.
1953         * testsuite/25_algorithms/remove_copy/constexpr.cc: New.
1954         * testsuite/25_algorithms/remove_copy_if/constexpr.cc: New.
1955         * testsuite/25_algorithms/remove_if/constexpr.cc: New.
1956         * testsuite/25_algorithms/replace_copy/constexpr.cc: New.
1957         * testsuite/25_algorithms/replace_copy_if/constexpr.cc: New.
1958         * testsuite/25_algorithms/replace_if/constexpr.cc: New.
1959         * testsuite/25_algorithms/reverse_copy/constexpr.cc: New.
1960         * testsuite/25_algorithms/rotate_copy/constexpr.cc: New.
1961         * testsuite/25_algorithms/search/constexpr.cc: New.
1962         * testsuite/25_algorithms/search_n/constexpr.cc: New.
1963         * testsuite/25_algorithms/set_difference/constexpr.cc: New.
1964         * testsuite/25_algorithms/set_intersection/constexpr.cc: New.
1965         * testsuite/25_algorithms/set_symmetric_difference/constexpr.cc: New.
1966         * testsuite/25_algorithms/set_union/constexpr.cc: New.
1967         * testsuite/25_algorithms/transform/constexpr.cc: New.
1968         * testsuite/25_algorithms/unique/constexpr.cc: New.
1969         * testsuite/25_algorithms/unique_copy/constexpr.cc: New.
1970         * testsuite/25_algorithms/upper_bound/constexpr.cc: New.
1971
1972 2019-07-31  Jonathan Wakely  <jwakely@redhat.com>
1973
1974         * include/std/memory (make_obj_using_allocator): Qualify call to
1975         uses_allocator_construction_args.
1976
1977         P0631R4 Math Constants
1978         * include/Makefile.am: Add new header.
1979         * include/Makefile.in: Regenerate.
1980         * include/precompiled/stdc++.h: Include new header.
1981         * include/std/numbers: New header.
1982         * include/std/version (__cpp_lib_math_constants): Define.
1983         * testsuite/26_numerics/numbers/1.cc: New test.
1984         * testsuite/26_numerics/numbers/2.cc: New test.
1985         * testsuite/26_numerics/numbers/3.cc: New test.
1986         * testsuite/26_numerics/numbers/nonfloat_neg.cc: New test.
1987
1988         * include/std/bit: Add Doxygen comments.
1989
1990         PR libstdc++/91308
1991         * include/bits/unique_ptr.h (unique_ptr::__safe_conversion_up): Remove
1992         constraints on deleter that should only apply to the constructor.
1993         (unique_ptr<T[], D>::__safe_conversion_up): Likewise.
1994         (unique_ptr<T[], D>::unique_ptr(unique_ptr<U, D>&&)): Restore
1995         constraints on deleter here.
1996         * testsuite/20_util/unique_ptr/assign/91308.cc: New test.
1997
1998 2019-07-29  Jonathan Wakely  <jwakely@redhat.com>
1999
2000         PR libstdc++/51333
2001         * libsupc++/cxxabi.h (__gnu_cxx::recursive_init_error): Do not define
2002         constructor inline.
2003         * libsupc++/guard_error.cc (__gnu_cxx::recursive_init_error): Define
2004         constructor.
2005         * testsuite/18_support/51333.cc: New test.
2006
2007 2019-07-28  Gerald Pfeifer  <gerald@pfeifer.com>
2008
2009         * doc/xml/manual/documentation_hacking.xml: Fix broken reference
2010         to the Doxygen manual. Avoid a "here" link on the way.
2011         Fix another broken link to Doxygen docblocks.
2012
2013 2019-07-26  Jonathan Wakely  <jwakely@redhat.com>
2014
2015         * include/std/bit (__cpp_lib_endian): Define.
2016         * include/std/version (__cpp_lib_endian): Define.
2017         * testsuite/26_numerics/endian/2.cc: New.
2018         * testsuite/26_numerics/endian/3.cc: New.
2019         * testsuite/26_numerics/endian/4.cc: New.
2020
2021 2019-07-26  François Dumont  <fdumont@gcc.gnu.org>
2022
2023         * testsuite/util/testsuite_iterators.h
2024         (bidirectional_iterator_wrapper): Fix type comment.
2025         (random_access_iterator_wrapper): Likewise.
2026
2027 2019-07-25  Jonathan Wakely  <jwakely@redhat.com>
2028
2029         * include/std/bit (endian): Move definition here as per P1612R1.
2030         * include/std/type_traits (endian): Remove definition from here.
2031         * testsuite/20_util/endian/1.cc: Rename to ...
2032         * testsuite/26_numerics/endian/1.cc: ... here. Adjust header.
2033
2034 2019-07-25  Martin Liska  <mliska@suse.cz>
2035             Dominik Infuhr  <dominik.infuehr@theobroma-systems.com>
2036
2037         PR c++/23383
2038         * testsuite/ext/bitmap_allocator/check_delete.cc: Add
2039         -fno-allocation-dce.
2040         * testsuite/ext/bitmap_allocator/check_new.cc: Likewise.
2041         * testsuite/ext/new_allocator/check_delete.cc: Likewise.
2042         * testsuite/ext/new_allocator/check_new.cc: Likewise.
2043
2044 2019-07-22  Jonathan Wakely  <jwakely@redhat.com>
2045
2046         * testsuite/26_numerics/bit/bitops.count/*: Rename to ...
2047         * testsuite/26_numerics/bit/bit.count/*: Here.
2048
2049         * include/std/bit (__rotl, __rotr): Change second parameter from
2050         unsigned int to int and handle negative values.
2051         (rotl, rotr): Remove check for __STRICT_ANSI__. Change second
2052         parameter from unsigned int to int. Add nodiscard attribute.
2053         * testsuite/26_numerics/bit/bitops.rot/rotl.cc: Rename to ...
2054         * testsuite/26_numerics/bit/bit.rotate/rotl.cc: Here. Test negative
2055         shifts.
2056         * testsuite/26_numerics/bit/bitops.rot/rotr.cc: Rename to ...
2057         * testsuite/26_numerics/bit/bit.rotate/rotr.cc: Here. Test negative
2058         shifts.
2059
2060         * include/std/bit (__ceil2): Make unrepresentable results undefined,
2061         as per P1355R2. Add debug assertion. Perform one left shift, not two,
2062         so that out of range values cause undefined behaviour. Ensure that
2063         shift will still be undefined if left operand is promoted.
2064         * testsuite/26_numerics/bit/bit.pow.two/ceil2.cc: Replace checks for
2065         unrepresentable values with checks that they are not core constant
2066         expressions.
2067         * testsuite/26_numerics/bit/bit.pow.two/ceil2_neg.cc: New test.
2068
2069 2019-07-19  François Dumont  <fdumont@gcc.gnu.org>
2070
2071         * include/bits/stl_tempbuf.h (__detail::__return_temporary_buffer): Fix
2072         sized deallocation size computation.
2073
2074 2019-07-19  Andreas Schwab  <schwab@linux-m68k.org>
2075
2076         * config/abi/post/m68k-linux-gnu/baseline_symbols.txt: Update.
2077
2078 2019-07-18  François Dumont  <fdumont@gcc.gnu.org>
2079
2080         * include/bits/stl_tempbuf.h (__detail::__return_temporary_buffer): New.
2081         (~_Temporary_buffer()): Use latter.
2082         (_Temporary_buffer(_FIterator, size_type)): Likewise.
2083
2084 2019-07-17  Andreas Schwab  <schwab@suse.de>
2085
2086         * config/abi/post/ia64-linux-gnu/baseline_symbols.txt: Update.
2087
2088 2019-07-16  Jason Merrill  <jason@redhat.com>
2089
2090         * include/std/memory (uses_allocator_construction_args): Add parens
2091         around constraint.
2092
2093 2019-07-12  Jonathan Wakely  <jwakely@redhat.com>
2094
2095         * testsuite/29_atomics/atomic_float/1.cc: Fix comment.
2096
2097         * include/experimental/string_view (__detail::__idt): Remove.
2098         (operator==, operator!=, operator<, operator>, operator<=, operator>=):
2099         Use __type_identity_t instead of __detail::__idt;
2100         * include/std/string_view (__detail::__idt): Remove.
2101         (operator==, operator!=, operator<, operator>, operator<=, operator>=):
2102         Use __type_identity_t instead of __detail::__idt;
2103         * include/std/type_traits (__type_identity_t): New alias template.
2104
2105         * doc/xml/manual/status_cxx2020.xml: Update status for atomic_ref
2106         and floating point atomics.
2107
2108 2019-07-11  Jonathan Wakely  <jwakely@redhat.com>
2109
2110         * doc/xml/manual/configure.xml: Improve documentation of
2111         --enable-libstdcxx-time option.
2112
2113         * include/bits/atomic_base.h (__atomic_impl): New namespace for
2114         wrappers around atomic built-ins.
2115         (__atomic_float, __atomic_ref): New class templates for use as base
2116         classes.
2117         * include/std/atomic (atomic<float>, atomic<double>)
2118         (atomic<long double>): New explicit specializations.
2119         (atomic_ref): New class template.
2120         (__cpp_lib_atomic_ref): Define.
2121         * include/std/version (__cpp_lib_atomic_ref): Define.
2122         * testsuite/29_atomics/atomic/60695.cc: Adjust dg-error.
2123         * testsuite/29_atomics/atomic_float/1.cc: New test.
2124         * testsuite/29_atomics/atomic_float/requirements.cc: New test.
2125         * testsuite/29_atomics/atomic_ref/deduction.cc: New test.
2126         * testsuite/29_atomics/atomic_ref/float.cc: New test.
2127         * testsuite/29_atomics/atomic_ref/generic.cc: New test.
2128         * testsuite/29_atomics/atomic_ref/integral.cc: New test.
2129         * testsuite/29_atomics/atomic_ref/pointer.cc: New test.
2130         * testsuite/29_atomics/atomic_ref/requirements.cc: New test.
2131
2132 2019-07-06  Jonathan Wakely  <jwakely@redhat.com>
2133
2134         * include/ext/atomicity.h (__exchange_and_add, __atomic_add): Replace
2135         throw() with _GLIBCXX_NOTHROW.
2136         (__atomic_add_dispatch): Return after performing atomic increment.
2137
2138 2019-07-05  Jonathan Wakely  <jwakely@redhat.com>
2139
2140         * include/ext/atomicity.h [_GLIBCXX_ATOMIC_BUILTINS] (__atomic_add)
2141         (__exchange_and_add): Replace static specifier with always_inline
2142         attribute.
2143         (__exchange_and_add_single, __atomic_add_single): Likewise.
2144         (__exchange_and_add_dispatch, __atomic_add_dispatch): Likewise. Also
2145         combine !__gthread_active_p() and !__GTHREADS branches.
2146
2147 2019-07-03  Jonathan Wakely  <jwakely@redhat.com>
2148
2149         PR libstdc++/91067
2150         * acinclude.m4 (libtool_VERSION): Bump to 6:27:0.
2151         * configure: Regenerate.
2152         * config/abi/pre/gnu.ver (GLIBCXX_3.4.27): Add new version. Export
2153         missing symbols.
2154         * testsuite/27_io/filesystem/iterators/91067.cc: New test.
2155         * testsuite/util/testsuite_abi.cc: Add new symbol version.
2156
2157 2019-07-02  Jonathan Wakely  <jwakely@redhat.com>
2158
2159         * include/bits/c++config (_GLIBCXX_HAVE_BUILTIN_LAUNDER)
2160         (_GLIBCXX_HAVE_BUILTIN_IS_CONSTANT_EVALUATED): Use __has_builtin
2161         instead of __is_identifier to detect Clang support.
2162
2163 2019-07-02  Jim Wilson  <jimw@sifive.com>
2164
2165         * configure.ac (BUILD_PDF): Also test for doxygen, dot, xsltproc,
2166         and xmllint.
2167         * configure: Regenerate.
2168
2169 2019-06-27  Jonathan Wakely  <jwakely@redhat.com>
2170
2171         PR libstdc++/91012
2172         * src/c++17/fs_path.cc (filesystem_error::_Impl): Use a string_view
2173         for the what_arg parameters.
2174         (filesystem_error::filesystem_error): Pass system_error::what() to
2175         the _Impl constructor.
2176         * testsuite/27_io/filesystem/filesystem_error/cons.cc: Ensure that
2177         filesystem_error::what() contains system_error::what().
2178
2179 2019-06-26  Jonathan Wakely  <jwakely@redhat.com>
2180
2181         * include/std/charconv (chars_format): Define bitmask type.
2182         * testsuite/20_util/to_chars/chars_format.cc: New test.
2183
2184         * include/bits/fs_path.h (path::__is_encoded_char): Use __is_one_of.
2185         * include/std/bit (_If_is_unsigned_integer_type): Remove.
2186         (_If_is_unsigned_integer): Use __is_unsigned_integer.
2187         (rotl(byte, unsigned), rotr(byte, unsigned), countl_zero(byte))
2188         (countl_one(byte), countr_zero(byte), countr_one(byte))
2189         (popcount(byte), ispow2(byte), ceil2(byte), floor2(byte))
2190         (log2p1(byte)): Remove.
2191         * include/std/charconv (__detail::__is_one_of): Move to <type_traits>.
2192         (__detail::__is_int_to_chars_type): Remove.
2193         (__detail::__integer_to_chars_result_type): Use __is_signed_integer
2194         and __is_unsigned_integer.
2195         * include/std/type_traits (__is_one_of): Move here from <charconv>.
2196         (__is_signed_integer, __is_unsigned_integer): New helpers.
2197         * testsuite/26_numerics/bit/bit.pow.two/ceil2.cc: Remove test for
2198         std::byte overload.
2199         * testsuite/26_numerics/bit/bit.pow.two/floor2.cc: Likewise.
2200         * testsuite/26_numerics/bit/bit.pow.two/ispow2.cc: Likewise.
2201         * testsuite/26_numerics/bit/bit.pow.two/log2p1.cc: Likewise.
2202         * testsuite/26_numerics/bit/bitops.count/countl_one.cc: Likewise.
2203         * testsuite/26_numerics/bit/bitops.count/countl_zero.cc: Likewise.
2204         * testsuite/26_numerics/bit/bitops.count/countr_one.cc: Likewise.
2205         * testsuite/26_numerics/bit/bitops.count/countr_zero.cc: Likewise.
2206         * testsuite/26_numerics/bit/bitops.count/popcount.cc: Likewise.
2207         * testsuite/26_numerics/bit/bitops.rot/rotl.cc: Likewise.
2208         * testsuite/26_numerics/bit/bitops.rot/rotr.cc: Likewise.
2209
2210 2019-06-25  Jonathan Wakely  <jwakely@redhat.com>
2211
2212         * include/std/numeric (midpoint(T, T)): Avoid std::abs in constexpr
2213         function.
2214
2215 2019-06-25  Jakub Jelinek  <jakub@redhat.com>
2216
2217         * include/pstl/pstl_config.h (_PSTL_PRAGMA_SIMD_SCAN,
2218         _PSTL_PRAGMA_SIMD_INCLUSIVE_SCAN, _PSTL_PRAGMA_SIMD_EXCLUSIVE_SCAN):
2219         Define to OpenMP 5.0 pragmas even for GCC 10.0+.
2220         (_PSTL_UDS_PRESENT): Define to 1 for GCC 10.0+.
2221
2222 2019-06-24  Jonathan Wakely  <jwakely@redhat.com>
2223
2224         * include/std/numeric (midpoint(T, T)): Change implementation for
2225         floating-point types to avoid incorrect rounding of denormals.
2226         * testsuite/26_numerics/midpoint/floating.cc: Add check for correct
2227         rounding with denormals.
2228         * testsuite/26_numerics/gcd/gcd_neg.cc: Adjust dg-error line numbers.
2229         * testsuite/26_numerics/lcm/lcm_neg.cc: Likewise.
2230
2231         * testsuite/18_support/headers/cfloat/values_c++17.cc: New test.
2232
2233 2019-06-20  Jonathan Wakely  <jwakely@redhat.com>
2234
2235         * acinclude.m4 (GLIBCXX_ENABLE_DEBUG): Only do debug build for final
2236         stage of bootstrap.
2237         * configure: Regenerate.
2238
2239         * include/std/variant (_Variant_storage, _Extra_visit_slot_needed):
2240         Qualify calls to __never_valueless.
2241
2242         * doc/xml/manual/status_cxx2017.xml: Fix outdated reference to
2243         C++17 working draft.
2244
2245         * testsuite/libstdc++-prettyprinters/simple.cc: Use non-palindromic
2246         vector<bool> for test.
2247         * testsuite/libstdc++-prettyprinters/simple11.cc: Likewise.
2248
2249 2019-06-19  Jonathan Wakely  <jwakely@redhat.com>
2250
2251         * include/bits/stream_iterator.h (istream_iterator::_M_equal()): Make
2252         private.
2253         (istream_iterator::_M_read()): Do not check stream state before
2254         attempting extraction. Set stream pointer to null when extraction
2255         fails (P0738R2).
2256         (operator==(const istream_iterator&, const istream_iterator&)): Change
2257         to be a hidden friend of istream_iterator.
2258         (operator!=(const istream_iterator&, const istream_iterator&)):
2259         Likewise.
2260         (ostream_iterator::ostream_iterator()): Add default constructor.
2261         (ostream_iterator::ostream_iterator(ostream_type*, const C*)): Use
2262         addressof.
2263         * testsuite/24_iterators/istream_iterator/1.cc: New test.
2264         * testsuite/24_iterators/ostream_iterator/1.cc: New test.
2265         * testsuite/24_iterators/ostream_iterator/70766.cc: Also check
2266         constructor taking a string.
2267         * testsuite/24_iterators/ostream_iterator/requirements/constexpr.cc:
2268         New test.
2269
2270 2019-06-19  Michael Weghorn  <m.weghorn@posteo.de>
2271             Jonathan Wakely  <jwakely@redhat.com>
2272
2273         PR libstdc++/90945
2274         * python/libstdcxx/v6/printers.py (StdVectorPrinter._iterator): Use
2275         values of type bool for vector<bool> elements.
2276         * testsuite/libstdc++-prettyprinters/simple.cc: Test vector<bool>.
2277         * testsuite/libstdc++-prettyprinters/simple11.cc: Likewise.
2278
2279 2019-06-19  Jonathan Wakely  <jwakely@redhat.com>
2280
2281         PR libstdc++/90920 partially revert r263433
2282         * include/bits/stl_algo.h (__rotate): Restore checks for empty ranges.
2283         (rotate): Remove checks.
2284         * testsuite/25_algorithms/rotate/90920.cc: New test.
2285
2286         * include/std/numeric (reduce(Iter, Iter, T, BinOp)): Fix value
2287         category used in invocable check.
2288         (reduce(Iter, Iter, T)): Pass initial value as rvalue.
2289         * testsuite/26_numerics/reduce/2.cc: New test.
2290
2291 2019-06-18  Jonathan Wakely  <jwakely@redhat.com>
2292
2293         * include/bits/algorithmfwd.h: Change title of doc group.
2294         * include/bits/stl_algo.h (for_each_n): Add new C++17 algorithm from
2295         P0024R2.
2296         * include/bits/stl_numeric.h: Define doc group and add algos to it.
2297         * include/std/numeric (__is_random_access_iter): New internal trait.
2298         (reduce, transform_reduce, exclusive_scan, inclusive_scan)
2299         (transform_exclusive_scan, transform_inclusive_scan): Likewise.
2300         * testsuite/25_algorithms/for_each/for_each_n.cc: New test.
2301         * testsuite/26_numerics/exclusive_scan/1.cc: New test.
2302         * testsuite/26_numerics/inclusive_scan/1.cc: New test.
2303         * testsuite/26_numerics/reduce/1.cc: New test.
2304         * testsuite/26_numerics/transform_exclusive_scan/1.cc: New test.
2305         * testsuite/26_numerics/transform_inclusive_scan/1.cc: New test.
2306         * testsuite/26_numerics/transform_reduce/1.cc: New test.
2307         * testsuite/util/testsuite_iterators.h (test_container::size()): New
2308         member function.
2309
2310         * include/c_global/cstddef (std::byte): Perform arithmetic operations
2311         in unsigned int to avoid promotion (LWG 2950).
2312
2313 2019-06-17  Jonathan Wakely  <jwakely@redhat.com>
2314
2315         * testsuite/20_util/allocator/1.cc: Add sized delete, which fixes a
2316         failure on AIX.
2317
2318         * include/c_global/cmath (__lerp, lerp): Add noexcept (LWG 3201).
2319
2320         PR libstdc++/90281 Fix string conversions for filesystem::path
2321         * include/bits/fs_path.h (u8path) [_GLIBCXX_FILESYSTEM_IS_WINDOWS]:
2322         Use codecvt_utf8_utf16 instead of codecvt_utf8. Use
2323         __str_codecvt_in_all to fail for partial conversions and throw on
2324         error.
2325         [!_GLIBCXX_FILESYSTEM_IS_WINDOWS && _GLIBCXX_USE_CHAR8_T]
2326         (path::_Cvt<char8_t>): Add explicit specialization.
2327         [_GLIBCXX_FILESYSTEM_IS_WINDOWS] (path::_Cvt::_S_wconvert): Remove
2328         overloads.
2329         [_GLIBCXX_FILESYSTEM_IS_WINDOWS] (path::_Cvt::_S_convert): Use
2330         if-constexpr instead of dispatching to _S_wconvert. Use codecvt
2331         instead of codecvt_utf8. Use __str_codecvt_in_all and
2332         __str_codecvt_out_all.
2333         [!_GLIBCXX_FILESYSTEM_IS_WINDOWS] (path::_Cvt::_S_convert): Use
2334         codecvt instead of codecvt_utf8. Use __str_codecvt_out_all.
2335         (path::_S_str_convert) [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Use
2336         codecvt_utf8_utf16 instead of codecvt_utf8. Construct return values
2337         with allocator. Use __str_codecvt_out_all. Fallthrough to POSIX code
2338         after converting to UTF-8.
2339         (path::_S_str_convert): Use codecvt instead of codecvt_utf8. Use
2340         __str_codecvt_in_all.
2341         (path::string): Fix initialization of string types with different
2342         allocators.
2343         (path::u8string) [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Use
2344         codecvt_utf8_utf16 instead of codecvt_utf8. Use __str_codecvt_out_all.
2345         * include/bits/locale_conv.h (__do_str_codecvt): Reorder static and
2346         runtime conditions.
2347         (__str_codecvt_out_all, __str_codecvt_in_all): New functions that
2348         return false for partial conversions.
2349         * include/experimental/bits/fs_path.h (u8path):
2350         [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Implement correctly for mingw.
2351         [_GLIBCXX_FILESYSTEM_IS_WINDOWS] (path::_Cvt::_S_wconvert): Add
2352         missing handling for char8_t. Use codecvt and codecvt_utf8_utf16
2353         instead of codecvt_utf8. Use __str_codecvt_in_all and
2354         __str_codecvt_out_all.
2355         [!_GLIBCXX_FILESYSTEM_IS_WINDOWS] (path::_Cvt::_S_convert): Use
2356         codecvt instead of codecvt_utf8. Use __str_codecvt_out_all.
2357         (path::string) [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Use
2358         codecvt_utf8_utf16 instead of codecvt_utf8. Construct return values
2359         with allocator. Use __str_codecvt_out_all and __str_codecvt_in_all.
2360         (path::string) [!_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Use
2361         __str_codecvt_in_all.
2362         (path::u8string) [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Use
2363         codecvt_utf8_utf16 instead of codecvt_utf8. Use __str_codecvt_out_all.
2364         * src/c++17/fs_path.cc (path::_S_convert_loc): Use
2365         __str_codecvt_in_all.
2366         * src/filesystem/path.cc (path::_S_convert_loc): Likewise.
2367         * testsuite/27_io/filesystem/path/construct/90281.cc: New test.
2368         * testsuite/27_io/filesystem/path/factory/u8path.cc: New test.
2369         * testsuite/27_io/filesystem/path/native/string.cc: Test with empty
2370         strings and with Unicode characters outside the basic multilingual
2371         plane.
2372         * testsuite/27_io/filesystem/path/native/alloc.cc: New test.
2373         * testsuite/experimental/filesystem/path/construct/90281.cc: New test.
2374         * testsuite/experimental/filesystem/path/factory/u8path.cc: New test.
2375         * testsuite/experimental/filesystem/path/native/alloc.cc: New test.
2376         * testsuite/experimental/filesystem/path/native/string.cc: Test with
2377         empty strings and with Unicode characters outside the basic
2378         multilingual plane.
2379
2380 2019-06-17  François Dumont  <fdumont@gcc.gnu.org>
2381             Jonathan Wakely  <jwakely@redhat.com>
2382
2383         * include/bits/hashtable.h (struct _Hashtable::_Scoped_node): New type.
2384         (_Hashtable::_M_insert_unique_node): Add key_type parameter. Don't
2385         deallocate node if insertion fails.
2386         (_Hashtable::_M_insert_multi_node): Likewise.
2387         (_Hashtable::_M_reinsert_node): Pass additional key argument.
2388         (_Hashtable::_M_reinsert_node_multi): Likewise. Remove FIXME.
2389         (_Hashtable::_M_extract_node(size_t, __node_base*)): New function.
2390         (_Hashtable::extract(const_iterator)): Use _M_extract_node.
2391         (_Hashtable::extract(const _Key&)): Likewise.
2392         (_Hashtable::_M_merge_unique): Pass additional key argument.
2393         (_Hashtable::_M_emplace<Args>(true_type, Args&&...)): Likewise. Use
2394         _Scoped_node.
2395         (_Hashtable::_M_insert): Likewise.
2396         * include/bits/hashtable_policy.h (_Map_base::operator[]): Likewise.
2397         (_Hashtable_alloc): Add comments to functions with misleading names.
2398
2399 2019-06-17  Jonathan Wakely  <jwakely@redhat.com>
2400
2401         * testsuite/20_util/bad_function_call/what.cc: Include <string> header
2402         for std::string.
2403         * testsuite/20_util/shared_ptr/cons/weak_ptr_expired.cc: Likewise.
2404         * testsuite/20_util/tuple/cons/allocator_with_any.cc: Include <memory>
2405         header for std::allocator.
2406         * testsuite/23_containers/array/tuple_interface/tuple_element.cc: Add
2407         using-declaration for std::size_t.
2408         * testsuite/23_containers/array/tuple_interface/tuple_size.cc:
2409         Likewise.
2410         * testsuite/23_containers/deque/cons/55977.cc: Include <istream> for
2411         std::istream.
2412         * testsuite/23_containers/vector/cons/55977.cc: Likewise.
2413         * testsuite/experimental/map/erasure.cc: Include <string> for
2414         std::string.
2415         * testsuite/experimental/unordered_map/erasure.cc: Likewise.
2416
2417 2019-06-14  Jonathan Wakely  <jwakely@redhat.com>
2418
2419         * include/experimental/type_traits (experimental::nonesuch): Use
2420         pragma to disable -Wctor-dtor-privacy warnings.
2421         * include/std/type_traits (__is_convertible_helper<From, To, false>)
2422         (__is_nt_convertible_helper<From, To, false>, __nonesuch): Likewise.
2423
2424         * include/std/version (__cpp_lib_bind_front): Add missing macro.
2425
2426 2019-06-12  Jonathan Wakely  <jwakely@redhat.com>
2427
2428         * include/std/algorithm (__cpp_lib_parallel_algorithm): Fix value.
2429         * include/std/memory (__cpp_lib_parallel_algorithm): Likewise.
2430         * include/std/numeric (__cpp_lib_parallel_algorithm): Likewise.
2431         * testsuite/25_algorithms/pstl/feature_test.cc: New test.
2432
2433         * include/std/variant (get<T>, get<N>, get_if<N>, get_if<T>)
2434         (variant::emplace): Change static_assert messages from "should be"
2435         to "must be".
2436         (hash<monostate>::operator()): Remove name of unused parameter.
2437
2438         * include/std/mutex (scoped_lock::~scoped_lock()): Use fold
2439         expression.
2440
2441         * include/Makefile.am: Add new <bits/charconv.h> header.
2442         * include/Makefile.in: Regenerate.
2443         * include/bits/basic_string.h (to_string(int), to_string(unsigned))
2444         (to_string(long), to_string(unsigned long), to_string(long long))
2445         (to_string(unsigned long long)): Rewrite to use __to_chars_10_impl.
2446         * include/bits/charconv.h: New header.
2447         (__detail::__to_chars_len): Move here from <charconv>.
2448         (__detail::__to_chars_10_impl): New function extracted from
2449         __detail::__to_chars_10.
2450         * include/std/charconv (__cpp_lib_to_chars): Add, but comment out.
2451         (__to_chars_unsigned_type): New class template that reuses
2452         __make_unsigned_selector_base::__select to pick a type.
2453         (__unsigned_least_t): Redefine as __to_chars_unsigned_type<T>::type.
2454         (__detail::__to_chars_len): Move to new header.
2455         (__detail::__to_chars_10): Add inline specifier. Move code doing the
2456         output to __detail::__to_chars_10_impl and call that.
2457         * include/std/version (__cpp_lib_to_chars): Add, but comment out.
2458         * testsuite/21_strings/basic_string/numeric_conversions/char/
2459         to_string.cc: Fix reference in comment. Remove unused variable.
2460         * testsuite/21_strings/basic_string/numeric_conversions/char/
2461         to_string_int.cc: New test.
2462
2463 2019-06-09  Edward Smith-Rowland  <3dw4rd@verizon.net>
2464
2465         Fix ConstexprIterator requirements tests - No constexpr algorithms!
2466         * testsuite/21_strings/basic_string_view/requirements/constexpr_iter.cc:
2467         Replace copy with hand-rolled loop.
2468         * testsuite/23_containers/array/requirements/constexpr_iter.cc:
2469         Ditto.
2470
2471 2019-06-08  Edward Smith-Rowland  <3dw4rd@verizon.net>
2472
2473         Test for C++20 p0858 - ConstexprIterator requirements.
2474         * testsuite/21_strings/basic_string_view/requirements/constexpr_iter.cc:
2475         New test.
2476         * testsuite/23_containers/array/requirements/constexpr_iter.cc:
2477         New test.
2478
2479 2019-06-07  Thomas Rodgers  <trodgers@redhat.com>
2480
2481         Rename PSTL macro's consistent with libstdc++ (and llvm upstream
2482         project) standards.
2483         * include/bits/c++config: Rename all macros of the form __PSTL* to
2484         _PSTL*.
2485         * include/std/algorithm: Likewise.
2486         * include/std/execution: Likewise.
2487         * include/std/numeric: Likewise.
2488         * include/std/memory: Likewise.
2489         * include/pstl/glue_memory_impl.h: Likewise.
2490         * include/pstl/numeric_impl.h: Likewise.
2491         * include/pstl/glue_memory_defs.h: Likewise.
2492         * include/pstl/execution_defs.h: Likewise.
2493         * include/pstl/utils.h: Likewise.
2494         * include/pstl/algorithm_fwd.h: Likewise.
2495         * include/pstl/unseq_backend_simd.h: Likewise.
2496         * include/pstl/glue_execution_defs.h: Likewise.
2497         * include/pstl/algorithm_impl.h: Likewise.
2498         * include/pstl/parallel_impl.h: Likewise.
2499         * include/pstl/memory_impl.h: Likewise.
2500         * include/pstl/glue_numeric_defs.h: Likewise.
2501         * include/pstl/parallel_backend_utils.h: Likewise.
2502         * include/pstl/glue_algorithm_defs.h: Likewise.
2503         * include/pstl/parallel_backend.h: Likewise.
2504         * include/pstl/glue_numeric_impl.h: Likewise.
2505         * include/pstl/parallel_backend_tbb.h: Likewise.
2506         * include/pstl/numeric_fwd.h: Likewise.
2507         * include/pstl/glue_algorithm_impl.h: Likewise.
2508         * include/pstl/execution_impl.h: Likewise.
2509         * include/pstl/pstl_config.h: Likewise.
2510         * testsuite/util/pstl/pstl_test_config.h: Likewise.
2511         * testsuite/util/pstl/test_utils.h: Likewise.
2512         * testsuite/20_util/specialized_algorithms/pstl/uninitialized_construct.cc:
2513         Likewise.
2514         * testsuite/20_util/specialized_algorithms/pstl/uninitialized_copy_move.cc:
2515         Likewise.
2516         * testsuite/26_numerics/pstl/numeric_ops/adjacent_difference.cc:
2517         Likewise.
2518         * testsuite/26_numerics/pstl/numeric_ops/scan.cc: Likewise.
2519         * testsuite/26_numerics/pstl/numeric_ops/transform_scan.cc: Likewise.
2520         * testsuite/26_numerics/pstl/numeric_ops/reduce.cc: Likewise.
2521         * testsuite/25_algorithms/pstl/alg_nonmodifying/reverse.cc: Likewise.
2522         * testsuite/25_algorithms/pstl/alg_nonmodifying/nth_element.cc:
2523         Likewise.
2524         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_end.cc: Likewise.
2525         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_if.cc: Likewise.
2526         * testsuite/25_algorithms/pstl/alg_nonmodifying/none_of.cc: Likewise.
2527         * testsuite/25_algorithms/pstl/alg_nonmodifying/count.cc: Likewise.
2528         * testsuite/25_algorithms/pstl/alg_nonmodifying/reverse_copy.cc:
2529         Likewise.
2530         * testsuite/25_algorithms/pstl/alg_nonmodifying/equal.cc: Likewise.
2531         * testsuite/25_algorithms/pstl/alg_nonmodifying/search_n.cc: Likewise.
2532         * testsuite/25_algorithms/pstl/alg_nonmodifying/find.cc: Likewise.
2533         * testsuite/25_algorithms/pstl/alg_nonmodifying/all_of.cc: Likewise.
2534         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_first_of.cc:
2535         Likewise.
2536         * testsuite/25_algorithms/pstl/alg_sorting/is_heap.cc: Likewise.
2537         * testsuite/25_algorithms/pstl/alg_sorting/partial_sort.cc: Likewise.
2538         * testsuite/25_algorithms/pstl/alg_sorting/partial_sort_copy.cc:
2539         Likewise.
2540         * testsuite/25_algorithms/pstl/alg_sorting/lexicographical_compare.cc:
2541         Likewise.
2542         * testsuite/25_algorithms/pstl/alg_merge/inplace_merge.cc: Likewise.
2543         * testsuite/25_algorithms/pstl/alg_merge/merge.cc: Likewise.
2544         * testsuite/25_algorithms/pstl/alg_modifying_operations/unique_copy_equal.cc:
2545         Likewise.
2546         * testsuite/25_algorithms/pstl/alg_modifying_operations/replace_copy.cc:
2547         Likewise.
2548         * testsuite/25_algorithms/pstl/alg_modifying_operations/is_partitioned.cc:
2549         Likewise.
2550         * testsuite/25_algorithms/pstl/alg_modifying_operations/rotate_copy.cc:
2551         Likewise.
2552         * testsuite/25_algorithms/pstl/alg_modifying_operations/remove.cc:
2553         Likewise.
2554         * testsuite/25_algorithms/pstl/alg_modifying_operations/copy_if.cc:
2555         Likewise.
2556         * testsuite/25_algorithms/pstl/alg_modifying_operations/partition_copy.cc:
2557         Likewise.
2558         * testsuite/25_algorithms/pstl/alg_modifying_operations/partition.cc:
2559         Likewise.
2560         * testsuite/25_algorithms/pstl/alg_modifying_operations/copy_move.cc:
2561         Likewise.
2562         * testsuite/25_algorithms/pstl/alg_modifying_operations/unique.cc:
2563         Likewise.
2564         * testsuite/25_algorithms/pstl/alg_modifying_operations/rotate.cc:
2565         Likewise.
2566         * testsuite/25_algorithms/pstl/alg_nonmodifying/any_of.cc: Likewise.
2567
2568         Rename header guards to be consistent with upstream project's
2569         conventions.
2570         * include/pstl/glue_memory_impl.h: Rename all macros of the form
2571         _PSTL_(.*)_H to _PSTL_\U\1_H.
2572         * include/pstl/numeric_impl.h: Likewise.
2573         * include/pstl/glue_memory_defs.h: Likewise.
2574         * include/pstl/execution_defs.h: Likewise.
2575         * include/pstl/utils.h: Likewise.
2576         * include/pstl/algorithm_fwd.h: Likewise.
2577         * include/pstl/unseq_backend_simd.h: Likewise.
2578         * include/pstl/glue_execution_defs.h: Likewise.
2579         * include/pstl/algorithm_impl.h: Likewise.
2580         * include/pstl/parallel_impl.h: Likewise.
2581         * include/pstl/memory_impl.h: Likewise.
2582         * include/pstl/glue_numeric_defs.h: Likewise.
2583         * include/pstl/parallel_backend_utils.h: Likewise.
2584         * include/pstl/glue_algorithm_defs.h: Likewise.
2585         * include/pstl/parallel_backend.h: Likewise.
2586         * include/pstl/glue_numeric_impl.h: Likewise.
2587         * include/pstl/parallel_backend_tbb.h: Likewise.
2588         * include/pstl/numeric_fwd.h: Likewise.
2589         * include/pstl/glue_algorithm_impl.h: Likewise.
2590         * include/pstl/execution_impl.h: Likewise.
2591         * include/pstl/pstl_config.h: Likewise.
2592         * testsuite/util/pstl/pstl_test_config.h: Likewise.
2593
2594         Synchronize libstdc++ parallel algorithms with upstream
2595         project.
2596         * include/pstl/algorithm_fwd.h: Synchronize with
2597         upstream PSTL project.
2598         * include/pstl/algorithm_impl.h: Likewise.
2599         * include/pstl/execution_defs.h: Likewise.
2600         * include/pstl/execution_impl.h: Likewise.
2601         * include/pstl/glue_algorithm_impl.h: Likewise.
2602         * include/pstl/glue_execution_defs.h: Likewise.
2603         * include/pstl/numeric_fwd.h: Likewise.
2604         * include/pstl/numeric_impl.h: Likewise.
2605         * include/pstl/parallel_backend.h: Likewise.
2606         * include/pstl/pstl_config.h: Likewise.
2607         * include/pstl/unseq_backend_simd.h: Likewise.
2608         * include/pstl/parallel_backend_serial.h: New file.
2609         * include/Makefile.am (pstl_headers): Add
2610         parallel_backend_serial.h.
2611         * include/Makefile.in: Regenerate.
2612
2613         Clean up non-conforming names
2614         * include/pstl/algorithm_impl.h (__parallel_set_union_op):
2615         Uglfiy copy_range1 and copy_range2
2616         (__pattern_walk2_n): Rename local n to __n
2617         * include/pstl/parallel_backend_tbb.h (struct __binary_no_op):
2618         Rename parameter _T to _Tp.
2619
2620         Integrate non-TBB serial backend support
2621         * include/bits/c++config: Adjust TBB detection logic to select serial
2622         PSTL backend if no TBB present.
2623         * testsuite/utils/pstl/test_utils.h: Remove check for
2624         _PSTL_USE_PAR_POLICIES
2625
2626 2019-06-07  Jonathan Wakely  <jwakely@redhat.com>
2627
2628         * testsuite/24_iterators/container_access.cc: Move dg-options before
2629         dg-do directive so the target check uses the -std option.
2630
2631         PR libstdc++/90770
2632         * configure: Regenerate.
2633         * src/Makefile.am (stamp-debug): Also test for missing makefile.
2634         * src/Makefile.in: Regenerate.
2635
2636 2019-06-06  Jonathan Wakely  <jwakely@redhat.com>
2637
2638         * include/std/array: Do not include <stdexcept>.
2639         * include/std/optional: Include <exception> and
2640         <bits/exception_defines.h> instead of <stdexcept>.
2641         * testsuite/20_util/function_objects/searchers.cc: Include <cctype>
2642         for std::isalnum.
2643         * testsuite/20_util/tuple/cons/deduction.cc: Include <memory> for
2644         std::allocator.
2645         * testsuite/23_containers/map/erasure.cc: Include <string>.
2646         * testsuite/23_containers/unordered_map/erasure.cc: Likewise.
2647
2648         * testsuite/23_containers/deque/requirements/dr438/assign_neg.cc: Add
2649         dg-prune-output for different C++98 diagnostic.
2650         * testsuite/23_containers/deque/requirements/dr438/constructor_1_neg.cc:
2651         Likewise.
2652         * testsuite/23_containers/deque/requirements/dr438/constructor_2_neg.cc:
2653         Likewise.
2654         * testsuite/23_containers/deque/requirements/dr438/insert_neg.cc:
2655         Likewise.
2656         * testsuite/23_containers/list/requirements/dr438/assign_neg.cc:
2657         Likewise.
2658         * testsuite/23_containers/list/requirements/dr438/constructor_1_neg.cc:
2659         Likewise.
2660         * testsuite/23_containers/list/requirements/dr438/constructor_2_neg.cc:
2661         Likewise.
2662         * testsuite/23_containers/list/requirements/dr438/insert_neg.cc:
2663         Likewise.
2664         * testsuite/23_containers/vector/requirements/dr438/assign_neg.cc:
2665         Likewise.
2666         * testsuite/23_containers/vector/requirements/dr438/
2667         constructor_1_neg.cc: Likewise.
2668         * testsuite/23_containers/vector/requirements/dr438/
2669         constructor_2_neg.cc: Likewise.
2670         * testsuite/23_containers/vector/requirements/dr438/insert_neg.cc:
2671         Likewise.
2672         * testsuite/libstdc++-prettyprinters/compat.cc: Do not run for C++98.
2673
2674         * testsuite/23_containers/unordered_map/requirements/debug_container.cc:
2675         Do not test allocator rebinding extension for C++2a.
2676         * testsuite/23_containers/unordered_set/allocator/ext_ptr.cc: Change
2677         dg-do directive for C++17 and C++2a.
2678
2679         * testsuite/23_containers/deque/requirements/explicit_instantiation/
2680         1_c++0x.cc: Remove redundant test.
2681         * testsuite/23_containers/deque/requirements/explicit_instantiation/
2682         2.cc: Use target selector instead of preprocessor condition.
2683         * testsuite/23_containers/deque/requirements/explicit_instantiation/
2684         3.cc: Do not run test for C++2a.
2685         * testsuite/23_containers/forward_list/requirements/
2686         explicit_instantiation/3.cc: Likewise.
2687         * testsuite/23_containers/forward_list/requirements/
2688         explicit_instantiation/5.cc: Do not test allocator rebinding extension
2689         for C++2a.
2690         * testsuite/23_containers/list/requirements/explicit_instantiation/
2691         1_c++0x.cc: Remove redundant test.
2692         * testsuite/23_containers/list/requirements/explicit_instantiation/
2693         2.cc: Use target selector instead of preprocessor condition.
2694         * testsuite/23_containers/list/requirements/explicit_instantiation/
2695         3.cc: Do not run test for C++2a.
2696         * testsuite/23_containers/list/requirements/explicit_instantiation/
2697         5.cc: Do not test allocator rebinding extension for C++2a.
2698         * testsuite/23_containers/map/requirements/explicit_instantiation/
2699         1_c++0x.cc: Remove redundant test.
2700         * testsuite/23_containers/map/requirements/explicit_instantiation/
2701         2.cc: Adjust comment.
2702         * testsuite/23_containers/map/requirements/explicit_instantiation/
2703         3.cc: Do not run test for C++2a.
2704         * testsuite/23_containers/map/requirements/explicit_instantiation/
2705         5.cc: Do not test allocator rebinding extension for C++2a.
2706         * testsuite/23_containers/multimap/requirements/explicit_instantiation/
2707         1_c++0x.cc: Remove redundant test.
2708         * testsuite/23_containers/multimap/requirements/explicit_instantiation/
2709         3.cc: Do not run test for C++2a.
2710         * testsuite/23_containers/multimap/requirements/explicit_instantiation/
2711         5.cc: Do not test allocator rebinding extension for C++2a.
2712         * testsuite/23_containers/multiset/requirements/explicit_instantiation/
2713         3.cc: Do not run test for C++2a.
2714         * testsuite/23_containers/multiset/requirements/explicit_instantiation/
2715         5.cc: Do not test allocator rebinding extension for C++2a.
2716         * testsuite/23_containers/set/requirements/explicit_instantiation/3.cc:
2717         Do not run test for C++2a.
2718         * testsuite/23_containers/set/requirements/explicit_instantiation/
2719         1_c++0x.cc: Remove redundant test.
2720         * testsuite/23_containers/set/requirements/explicit_instantiation/5.cc:
2721         Do not test allocator rebinding extension for C++2a.
2722         * testsuite/23_containers/unordered_map/requirements/
2723         explicit_instantiation/3.cc: Likewise.
2724         * testsuite/23_containers/unordered_map/requirements/
2725         explicit_instantiation/5.cc: Do not test allocator rebinding extension
2726         for C++2a.
2727         * testsuite/23_containers/unordered_multimap/requirements/
2728         explicit_instantiation/3.cc: Do not run test for C++2a.
2729         * testsuite/23_containers/unordered_multimap/requirements/
2730         explicit_instantiation/5.cc: Do not test allocator rebinding extension
2731         for C++2a.
2732         * testsuite/23_containers/unordered_multiset/requirements/
2733         explicit_instantiation/3.cc: Do not run test for C++2a.
2734         * testsuite/23_containers/unordered_multiset/requirements/
2735         explicit_instantiation/5.cc: Do not test allocator rebinding extension
2736         for C++2a.
2737         * testsuite/23_containers/unordered_set/requirements/
2738         explicit_instantiation/3.cc: Do not run test for C++2a.
2739         * testsuite/23_containers/unordered_set/requirements/
2740         explicit_instantiation/5.cc: Do not test allocator rebinding extension
2741         for C++2a.
2742         * testsuite/23_containers/vector/ext_pointer/explicit_instantiation/
2743         2.cc: Remove redundant test.
2744         * testsuite/23_containers/vector/ext_pointer/explicit_instantiation/
2745         3.cc: Do not run test for C++2a.
2746         * testsuite/23_containers/vector/requirements/explicit_instantiation/
2747         3.cc: Likewise.
2748
2749         * include/std/type_traits (is_empty, is_polymorphic, is_final)
2750         (is_abstract, is_aggregate): Remove static_assert.
2751         * testsuite/20_util/is_abstract/incomplete_neg.cc: Check for error
2752         from builtin only.
2753         * testsuite/20_util/is_aggregate/incomplete_neg.cc: Likewise. Add
2754         missing -std=gnu++17 option.
2755         * testsuite/20_util/is_empty/incomplete_neg.cc: New test.
2756         * testsuite/20_util/is_final/incomplete_neg.cc: New test.
2757         * testsuite/20_util/is_polymorphic/incomplete_neg.cc: Check for error
2758         from builtin only.
2759
2760         * testsuite/18_support/set_terminate.cc: Do not run for C++98 mode.
2761         * testsuite/18_support/set_unexpected.cc: Likewise.
2762         * testsuite/20_util/is_nothrow_invocable/value.cc: Test converting to
2763         void.
2764         * testsuite/20_util/is_nothrow_invocable/value_ext.cc: Fix constexpr
2765         function to be valid in C++11.
2766         * testsuite/26_numerics/complex/proj.cc: Do not run for C++98 mode.
2767         * testsuite/experimental/names.cc: Do not run for C++98 mode. Do not
2768         include Library Fundamentals or Networking headers in C++11 mode.
2769         * testsuite/ext/char8_t/atomic-1.cc: Do not run for C++98 mode.
2770
2771         * include/std/tuple (_TC): Replace with _TupleConstraints.
2772         (_TupleConstraints): New helper for SFINAE constraints, with more
2773         expressive member functions to reduce duplication when used.
2774         (tuple::_TC2, tuple::_TMC, tuple::_TNTC): Remove.
2775         (tuple::_TCC): Replace dummy type parameter with bool non-type
2776         parameter that can be used to check the pack size.
2777         (tuple::_ImplicitDefaultCtor, tuple::_ExplicitDefaultCtor)
2778         (tuple::_ImplicitCtor, tuple::_ExplicitCtor): New alias templates for
2779         checking constraints in constructors.
2780         (tuple::__valid_args, tuple::_UseOtherCtor, tuple::__use_other_ctor):
2781         New SFINAE helpers.
2782         (tuple::tuple): Use new helpers to reduce repitition in constraints.
2783         (tuple::tuple(allocator_arg_t, const Alloc&)): Constrain.
2784         (tuple<T1, T2>::_TCC, tuple<T1, T2>::_ImplicitDefaultCtor)
2785         (tuple<T1, T2>::_ExplicitDefaultCtor, tuple<T1, T2>::_ImplicitCtor)
2786         (tuple<T1, T2>::_ExplicitCtor): New alias templates for checking
2787         constraints in constructors.
2788         (tuple::__is_alloc_arg()): New SFINAE helpers.
2789         (tuple<T1, T2>::tuple): Use new helpers to reduce repitition in
2790         constraints.
2791         (tuple<T1, T2>::tuple(allocator_arg_t, const Alloc&)): Constrain.
2792         * testsuite/20_util/tuple/cons/90700.cc: New test.
2793         * testsuite/20_util/tuple/cons/allocators.cc: Add default constructor
2794         to meet new constraint on allocator-extended default constructor.
2795
2796 2019-06-03  Jonathan Wakely  <jwakely@redhat.com>
2797
2798         * include/bits/stl_map.h (map): Disable static assert for C++98 mode.
2799         * include/bits/stl_multimap.h (multimap): Likewise.
2800
2801 2019-06-03  François Dumont  <fdumont@gcc.gnu.org>
2802
2803         Rename variables and cleanup comments.
2804         * include/bits/hashtable_policy.h
2805         * include/bits/hashtable.h
2806
2807 2019-06-03  Jonathan Wakely  <jwakely@redhat.com>
2808
2809         * doc/xml/manual/status_cxx2020.xml: Add missing row for P0920R2.
2810         Fix bgcolor for P0340R3.
2811         * doc/html/*: Regenerate.
2812
2813         PR libstdc++/90686
2814         * doc/xml/manual/status_cxx2014.xml: Document what's missing from
2815         <experimental/memory_resource>.
2816         * doc/xml/manual/status_cxx2020.xml: Document status of P1285R0,
2817         P0339R6, P0340R3, P1164R1 and P1357R1.
2818         * doc/html/*: Regenerate.
2819
2820         * doc/xml/manual/status_cxx2020.xml: Document P1463R1 status.
2821         * include/bits/forward_list.h [__cplusplus > 201703]: Enable
2822         allocator::value_type assertion for C++2a.
2823         * include/bits/hashtable.h: Likewise.
2824         * include/bits/stl_deque.h: Likewise.
2825         * include/bits/stl_list.h: Likewise.
2826         * include/bits/stl_map.h: Likewise.
2827         * include/bits/stl_multimap.h: Likewise.
2828         * include/bits/stl_multiset.h: Likewise.
2829         * include/bits/stl_set.h: Likewise.
2830         * include/bits/stl_vector.h: Likewise.
2831         * testsuite/23_containers/deque/48101-3_neg.cc: New test.
2832         * testsuite/23_containers/forward_list/48101-3_neg.cc: New test.
2833         * testsuite/23_containers/list/48101-3_neg.cc: New test.
2834         * testsuite/23_containers/map/48101-3_neg.cc: New test.
2835         * testsuite/23_containers/multimap/48101-3_neg.cc: New test.
2836         * testsuite/23_containers/multiset/48101-3_neg.cc: New test.
2837         * testsuite/23_containers/set/48101-3_neg.cc: New test.
2838         * testsuite/23_containers/unordered_map/48101-3_neg.cc: New test.
2839         * testsuite/23_containers/unordered_multimap/48101-3_neg.cc: New test.
2840         * testsuite/23_containers/unordered_multiset/48101-3_neg.cc: New test.
2841         * testsuite/23_containers/unordered_set/48101-3_neg.cc: New test.
2842         * testsuite/23_containers/vector/48101-3_neg.cc: New test.
2843
2844 2019-05-31  Gerald Pfeifer  <gerald@pfeifer.com>
2845
2846         * doc/xml/manual/allocator.xml: Move hoard.org back to http.
2847
2848 2019-05-31  Jonathan Wakely  <jwakely@redhat.com>
2849
2850         * include/std/tuple (tuple<>): Add noexcept to allocator-extended
2851         constructors.
2852         (tuple<T1, T2>::__nothrow_default_constructible()): New helper
2853         function.
2854         (tuple<T1, T2>::tuple(), explicit tuple<T1, T2>::tuple()): Use helper.
2855
2856 2019-05-31  Jonathan Wakely  <jwakely@redhat.com>
2857
2858         * src/c++98/bitmap_allocator.cc: Add using-declaration for size_t.
2859
2860         PR libstdc++/90682
2861         * libsupc++/eh_term_handler.cc: Include eh_term_handler.h to get
2862         definition of _GLIBCXX_DEFAULT_TERM_HANDLER.
2863         * libsupc++/eh_term_handler.h: New header defining
2864         _GLIBCXX_DEFAULT_TERM_HANDLER.
2865         * libsupc++/eh_terminate.cc: Include eh_term_handler.h.
2866         (set_terminate): Restore default handler when argument is null.
2867         (set_unexpected): Likewise.
2868         * testsuite/18_support/set_terminate.cc: New test.
2869         * testsuite/18_support/set_unexpected.cc: New test.
2870
2871         * include/backward/hashtable.h (size_t, ptrdiff_t)
2872         (forward_iterator_tag, input_iterator_tag, _Construct, _Destroy)
2873         (distance, vector, pair, __iterator_category): Remove
2874         using-declarations that add these names to namespace __gnu_cxx.
2875         * include/ext/bitmap_allocator.h (size_t, ptrdiff_t): Likewise.
2876         * include/ext/debug_allocator.h (size_t): Likewise.
2877         * include/ext/functional (size_t, unary_function, binary_function)
2878         (mem_fun1_t, const_mem_fun1_t, mem_fun1_ref_t, const_mem_fun1_ref_t):
2879         Likewise.
2880         * include/ext/malloc_allocator.h (size_t, ptrdiff_t): Likewise.
2881         * include/ext/memory (ptrdiff_t, pair, __iterator_category): Likewise.
2882         * include/ext/mt_allocator.h (size_t, ptrdiff_t): Likewise.
2883         * include/ext/new_allocator.h (size_t, ptrdiff_t): Likewise.
2884         * include/ext/numeric (iota): Fix outdated comment.
2885         * include/ext/pool_allocator.h (size_t, ptrdiff_t): Likewise.
2886         * include/ext/rb_tree (_Rb_tree, allocator): Likewise.
2887         * include/ext/rope (size_t, ptrdiff_t, allocator, _Destroy): Likewise.
2888         * include/ext/ropeimpl.h (size_t, printf, basic_ostream)
2889         (__throw_length_error, _Destroy, std::__uninitialized_fill_n_a):
2890         Likewise.
2891         * include/ext/slist (size_t, ptrdiff_t, _Construct, _Destroy)
2892         (allocator, __true_type, __false_type): Likewise.
2893
2894 2019-05-31  Antony Polukhin  <antoshkka@gmail.com>
2895
2896         PR libstdc++/71579
2897         * include/std/type_traits __type_identity, __is_complete_or_unbounded):
2898         New helpers for checking preconditions in traits.
2899         (is_trivial, is_trivially_copyable, is_standard_layout, is_pod)
2900         (is_literal_type, is_empty, is_polymorphic, is_final, is_abstract)
2901         (is_destructible, is_nothrow_destructible, is_constructible)
2902         (is_default_constructible, is_copy_constructible)
2903         (is_move_constructible, is_nothrow_default_constructible)
2904         (is_nothrow_constructible, is_nothrow_copy_constructible)
2905         (is_nothrow_move_constructible, is_copy_assignable, is_move_assignable)
2906         (is_nothrow_assignable, is_nothrow_copy_assignable)
2907         (is_nothrow_move_assignable, is_trivially_constructible)
2908         (is_trivially_copy_constructible, is_trivially_move_constructible)
2909         is_trivially_assignable, is_trivially_copy_assignable)
2910         (is_trivially_move_assignable, is_trivially_destructible)
2911         (alignment_of, is_swappable, is_nothrow_swappable, is_invocable)
2912         (is_invocable_r, is_nothrow_invocable)
2913         (has_unique_object_representations, is_aggregate): Add static_asserts
2914         to make sure that type traits are not misused with incomplete types.
2915         (__is_constructible_impl, __is_nothrow_default_constructible_impl)
2916         (__is_nothrow_constructible_impl, __is_nothrow_assignable_impl): New
2917         base characteristics without assertions that can be reused in other
2918         traits.
2919         * testsuite/20_util/is_complete_or_unbounded/memoization.cc: New test.
2920         * testsuite/20_util/is_complete_or_unbounded/memoization_neg.cc: New
2921         test.
2922         * testsuite/20_util/is_complete_or_unbounded/value.cc: New test.
2923         * testsuite/20_util/is_abstract/incomplete_neg.cc: New test.
2924         * testsuite/20_util/is_aggregate/incomplete_neg.cc: New test.
2925         * testsuite/20_util/is_class/value.cc: Check incomplete type.
2926         * testsuite/20_util/is_function/value.cc: Likewise.
2927         * testsuite/20_util/is_move_constructible/incomplete_neg.cc: New test.
2928         * testsuite/20_util/is_nothrow_move_assignable/incomplete_neg.cc: New
2929         test.
2930         * testsuite/20_util/is_polymorphic/incomplete_neg.cc: New test.
2931         * testsuite/20_util/is_reference/value.cc: Check incomplete types.
2932         * testsuite/20_util/is_unbounded_array/value.cc: Likewise.
2933         * testsuite/20_util/is_union/value.cc: Likewise.
2934         * testsuite/20_util/is_void/value.cc: Likewise.
2935         * testsuite/util/testsuite_tr1.h: Add incomplete union type.
2936
2937 2019-05-31  Jonathan Wakely  <jwakely@redhat.com>
2938
2939         * include/bits/random.h (random_device::_M_init(const char*, size_t)):
2940         Add new private member function.
2941         * src/c++11/cow-string-inst.cc (random_device::_M_init(const string&))
2942         (random_device::_M_init_pretr1(const string&)): Call new private
2943         member with string data.
2944         * src/c++11/random.cc (random_device::_M_init(const char*, size_t)):
2945         Define.
2946         * testsuite/26_numerics/random/random_device/cons/default-cow.cc: New
2947         test using COW strings.
2948         * testsuite/26_numerics/random/random_device/cons/default.cc: Generate
2949         a value from the device.
2950         * testsuite/26_numerics/random/random_device/cons/token.cc: Likewise.
2951         Fix typo in token string.
2952
2953 2019-05-30  Nina Dinka Ranns  <dinka.ranns@gmail.com>
2954
2955         LWG2788 basic_string spurious use of a default constructible allocator
2956         * include/bits/basic_string.tcc [_GLIBCXX_USE_CXX11_ABI]
2957         (basic_string::_M_replace_dispatch): Construct temporary string with
2958         the current allocator.
2959         * testsuite/21_strings/basic_string/allocator/char/lwg2788.cc: New.
2960         * testsuite/21_strings/basic_string/allocator/wchar_t/lwg2788.cc: New.
2961
2962 2019-05-30  Jonathan Wakely  <jwakely@redhat.com>
2963
2964         * doc/xml/manual/diagnostics.xml: Update list of headers that define
2965         exception classes.
2966         * doc/xml/manual/support.xml: Rewrite advice around NULL. Rewrite
2967         section about new/delete overloads. Improve section on verbose
2968         terminate handler.
2969         * doc/html/*: Regenerate.
2970
2971         * doc/xml/manual/status_cxx2020.xml: Add feature-test macro for
2972         P0811R3. Change status of P1353R0.
2973         * doc/html/*: Regenerate.
2974
2975         * doc/xml/manual/status_cxx2011.xml: Use <variablelist> for
2976         documentation of implementation-defined types for [thread.req.native].
2977         * doc/xml/manual/status_cxx2017.xml: Update documentation of
2978         implementation-defined strings for [variant.bad.access]. Fix typo in
2979         documentation of implementation-defined support for [fs.conform.9945].
2980         * doc/html/*: Regenerate.
2981
2982 2019-05-29  Jonathan Wakely  <jwakely@redhat.com>
2983
2984         PR libstdc++/85494
2985         * testsuite/26_numerics/random/random_device/cons/token.cc: Fix test
2986         that fails on mingw-w64.
2987
2988         PR libstdc++/88881
2989         * src/c++17/fs_ops.cc [_GLIBCXX_FILESYSTEM_IS_WINDOWS]
2990         (status(const path&, error_code&)): Use parent_path() to remove
2991         trailing slash.
2992         (symlink_status(const path&, error_code&)): Duplicate workaround for
2993         bug in _wstat for paths with trailing slash.
2994         * testsuite/27_io/filesystem/operations/remove_all.cc: Check path
2995         with trailing slash.
2996         * testsuite/27_io/filesystem/operations/status.cc: Likewise.
2997         * testsuite/27_io/filesystem/operations/symlink_status.cc: Likewise.
2998
2999         * src/c++17/fs_path.cc (path::parent_path()): Create whole path at
3000         once instead of building it iteratively.
3001
3002         * testsuite/util/testsuite_api.h: Remove names of unused parameters.
3003
3004         PR libstdc++/85494 use rdseed and rand_s in std::random_device
3005         * acinclude.m4 (GLIBCXX_CHECK_X86_RDSEED): Define macro to check if
3006         the assembler supports rdseed.
3007         * config.h.in: Regenerate.
3008         * configure: Regenerate.
3009         * configure.ac: Use GLIBCXX_CHECK_X86_RDSEED.
3010         * config/os/mingw32-w64/os_defines.h (_GLIBCXX_USE_CRT_RAND_S): Define.
3011         * doc/html/*: Regenerate.
3012         * doc/xml/manual/status_cxx2011.xml: Document new tokens.
3013         * include/bits/random.h (random_device::random_device()): Always call
3014         _M_init rather than _M_init_pretr1.
3015         (random_device::random_device(const string&)): Likewise.
3016         (random_device::operator()()): Always call _M_getval().
3017         (random_device::_M_file): Replace first member of union with an
3018         anonymous struct, with _M_file as its first member.
3019         * src/c++11/random.cc [_GLIBCXX_X86_RDRAND] (USE_RDRAND): Define.
3020         [_GLIBCXX_X86_RDSEED] (USE_RDSEED): Define.
3021         (USE_MT19937): Define if none of the above are defined.
3022         (USE_POSIX_FILE_IO): Define.
3023         (_M_strtoul): Remove.
3024         [USE_RDSEED] (__x86_rdseed): Define new function.
3025         [_GLIBCXX_USE_CRT_RAND_S] (__winxp_rand_s): Define new function.
3026         (random_device::_M_init(const string&)): Initialize new union members.
3027         Add support for "rdseed" and "rand_s" tokens. Decide what the
3028         "default" token does according to which USE_* macros are defined.
3029         [USE_POSIX_FILE_IO]: Store a file descriptor.
3030         [USE_MT19937]: Forward to _M_init_pretr1 instead.
3031         (random_device::_M_init_pretr1(const string&)) [USE_MT19937]: Inline
3032         code from _M_strtoul.
3033         [!USE_MT19937]: Call _M_init, transforming the old default token or
3034         numeric tokens to "default".
3035         (random_device::_M_fini()) [USE_POSIX_FILE_IO]: Use close not fclose.
3036         (random_device::_M_getval()): Use new union members to obtain a
3037         random number from the stored function pointer or file descriptor.
3038         [USE_MT19937]: Obtain a value from the mt19937 engine.
3039         (random_device::_M_getval_pretr1()): Call _M_getval().
3040         (random_device::_M_getentropy()) [USE_POSIX_FILE_IO]: Use _M_fd
3041         instead of fileno.
3042         [!USE_MT19937] (mersenne_twister): Do not instantiate when not needed.
3043         * testsuite/26_numerics/random/random_device/85494.cc: New test.
3044
3045 2019-05-28  Jonathan Wakely  <jwakely@redhat.com>
3046
3047         PR libstdc++/90634
3048         * include/experimental/bits/fs_path.h (path::path(path&&)): Only call
3049         _M_split_cmpts() for a path with multiple components.
3050         (path::_S_is_dir_sep()): Add missing 'static' keyword to function.
3051         * src/filesystem/path.cc (path::_M_split_cmpts()): Count number of
3052         components and reserve space in vector. Return early when there is
3053         only one component.
3054         * testsuite/27_io/filesystem/path/construct/90634.cc: New test.
3055         * testsuite/experimental/filesystem/path/construct/90634.cc: New test.
3056
3057         * testsuite/util/testsuite_fs.h (compare_paths): Use three-argument
3058         form of std::equals for C++11 compatibility.
3059
3060 2019-05-26  Gerald Pfeifer  <gerald@pfeifer.com>
3061
3062         * doc/xml/manual/appendix_contributing.xml: Update pointer to
3063         C++ standard at ansi.org.
3064
3065 2019-05-24  Jonathan Wakely  <jwakely@redhat.com>
3066
3067         * include/std/numeric (midpoint(T*, T*)): Fix incorrect result.
3068         * testsuite/26_numerics/midpoint/pointer.cc: Change "compile" test
3069         to "run".
3070
3071         * testsuite/20_util/shared_ptr/cons/alias-rval.cc: Fix test.
3072         * testsuite/20_util/shared_ptr/cons/alias.cc: Remove unused function.
3073
3074 2019-05-23  Jonathan Wakely  <jwakely@redhat.com>
3075
3076         * testsuite/20_util/function_objects/invoke/1.cc: Move C++17-specific
3077         tests to ...
3078         * testsuite/20_util/function_objects/invoke/3.cc: New test.
3079         * testsuite/23_containers/unordered_set/allocator/ext_ptr.cc: Change
3080         "compile" test to "run".
3081
3082         * doc/xml/manual/intro.xml: Document LWG DR 2996 change.
3083         * doc/html/*: Regenerate.
3084         * include/bits/shared_ptr.h (shared_ptr(shared_ptr&&, T*)): Add
3085         rvalue aliasing constructor.
3086         (static_pointer_cast, const_pointer, dynamic_pointer_cast)
3087         (reinterpret_pointer_cast): Add overloads taking rvalues.
3088         * include/bits/shared_ptr_base.h (__shared_ptr(__shared_ptr&&, T*)):
3089         Add rvalue aliasing constructor.
3090         * testsuite/20_util/shared_ptr/casts/1.cc: Change "compile" test to
3091         "run" and check return values as well as types.
3092         * testsuite/20_util/shared_ptr/casts/reinterpret.cc: Likewise.
3093         * testsuite/20_util/shared_ptr/casts/rval.cc: New test.
3094         * testsuite/20_util/shared_ptr/cons/alias-rval.cc: New test.
3095         * testsuite/20_util/shared_ptr/cons/alias.cc: Remove unused return
3096         values.
3097
3098         * doc/xml/manual/evolution.xml: Document LWG DR 2921 change.
3099         * doc/xml/manual/intro.xml: Likewise.
3100         * include/std/future (__create_task_state): Add default arguments
3101         to make providing an allocator optional.
3102         (packaged_task::packaged_task(F&&)): Call __create_task_state directly
3103         instead of delegating to another constructor.
3104         (packaged_task::packaged_task(allocator_arg_t, const A&, ...)): Do not
3105         define allocator-extended constructors for C++17 and later.
3106         * testsuite/30_threads/packaged_task/cons/alloc.cc: Only run test for
3107         C++11 and C++14.
3108         * testsuite/30_threads/packaged_task/cons/alloc2.cc: Likewise.
3109         * testsuite/30_threads/packaged_task/cons/alloc_min.cc: Likewise.
3110         * testsuite/30_threads/packaged_task/uses_allocator.cc: Likewise.
3111
3112 2019-05-23  Hans-Peter Nilsson  <hp@axis.com>
3113
3114         * testsuite/26_numerics/random/poisson_distribution/operators/values.cc:
3115         Don't run the libstdc++/83237 part on simulator targets.
3116
3117 2019-05-23  Jonathan Wakely  <jwakely@redhat.com>
3118
3119         * doc/xml/manual/status_cxx2017.xml: Add feature test macro for
3120         P0040R3.
3121         * doc/html/*: Regenerate.
3122
3123         * include/experimental/any (__any_caster): Use RTTI if comparing
3124         addresses fails, to support non-unique addresses in shared libraries.
3125         * include/std/any (__any_caster): Likewise.
3126
3127         PR libstdc++/90220
3128         * include/experimental/any (__any_caster): Constrain to only be
3129         callable for object types. Use remove_cv_t instead of decay_t.
3130         If the type decays or isn't copy constructible, compare the manager
3131         function to a dummy specialization.
3132         (__any_caster): Add overload constrained for non-object types.
3133         (any::_Manager_internal<_Op>): Add dummy specialization.
3134         * testsuite/experimental/any/misc/any_cast.cc: Test function types
3135         and array types.
3136
3137 2019-05-22  Jonathan Wakely  <jwakely@redhat.com>
3138
3139         PR libstdc++/90557
3140         * src/c++17/fs_path.cc (path::_List::operator=(const _List&)): Fix
3141         reversed arguments to uninitialized_copy_n.
3142         * testsuite/27_io/filesystem/path/assign/copy.cc: Check that source
3143         is unchanged by copy assignment.
3144         * testsuite/util/testsuite_fs.h (compare_paths): Use std::equal to
3145         compare path components.
3146
3147         PR libstdc++/77691
3148         * include/experimental/memory_resource: Add system header pragma and
3149         do not define anything unless compiled as C++14 or later.
3150         (__resource_adaptor_common::__guaranteed_alignment): Remove.
3151         (__resource_adaptor_imp::do_allocate): If the requested alignment
3152         is a fundamental alignment then either allocate directly from _M_alloc
3153         or call the new _M_allocate function.
3154         (__resource_adaptor_imp::do_deallocate): Likewise for deallocation.
3155         (__resource_adaptor_imp::_M_allocate): New function that uses a copy
3156         of the allocator rebound to a POD type with the specified alignment.
3157         (__resource_adaptor_imp::_M_deallocate): Likewise for deallocation.
3158         * testsuite/experimental/memory_resource/new_delete_resource.cc:
3159         Adjust expected allocation sizes.
3160         * testsuite/experimental/memory_resource/resource_adaptor.cc: Remove
3161         xfail for Solaris x86.
3162
3163 2019-05-21  Thomas Rodgers  <trodgers@redhat.com>
3164
3165         LWG 3062 - Unnecessary decay_t in is_execution_policy_v
3166         * include/pstl/execution_defs.h (__enable_if_execution_policy):
3167         Use std::__remove_cvref_t when building with GCC.
3168
3169 2019-05-21  Jonathan Wakely  <jwakely@redhat.com>
3170
3171         PR libstdc++/90252
3172         * testsuite/lib/libstdc++.exp (check_effective_target_tbb-backend):
3173         Use "additional_flags" to pass -ltbb to v3_target_compile command.
3174         Use check_v3_target_prop_cached to cache the result of the test.
3175
3176         * doc/xml/manual/shared_ptr.xml: Fix names of lock policy constants.
3177
3178 2019-05-20  Thomas Rodgers  <trodgers@redhat.com>
3179
3180         PR libstdc++/90252
3181         * testsuite/lib/libstdc++.exp (check_effective_target_tbb-backend):
3182         Changed v3_target_compile check from preprocess to executable.
3183         Added "-ltbb" to v3_target_compile flags.
3184
3185 2019-05-20  Thomas Rodgers  <trodgers@redhat.com>
3186
3187         * testsuite/lib/libstdc++.exp (check_effective_target_tbb-backend):
3188         Add check for Thread Building Blocks 2018 or later.
3189
3190 2019-05-20  Jonathan Wakely  <jwakely@redhat.com>
3191
3192         * testsuite/experimental/names.cc: Only include Networking TS headers
3193         on targets with the necessary Gthreads support.
3194
3195 2019-05-20  Marek Polacek  <polacek@redhat.com>
3196
3197         CWG 2094 - volatile scalars are trivially copyable.
3198         PR c++/85679
3199         * testsuite/20_util/is_trivially_copyable/value.cc: Change the expected
3200         result for volatile int.
3201
3202 2019-05-20  Jonathan Wakely  <jwakely@redhat.com>
3203
3204         * testsuite/17_intro/names.cc: Do not check 'ptr' on Solaris.
3205         * testsuite/experimental/names.cc: Include <experimental/filesystem>
3206         conditionally.
3207
3208         PR c++/90532 Ensure __is_constructible(T[]) is false
3209         * include/std/type_traits (__do_is_default_constructible_impl)
3210         (__is_default_constructible_atom, __is_default_constructible_safe):
3211         Remove.
3212         (is_default_constructible): Use is_constructible.
3213         * testsuite/20_util/is_constructible/value.cc: Check int[] case.
3214         * testsuite/20_util/is_default_constructible/value.cc: Likewise.
3215         * testsuite/20_util/is_trivially_constructible/value.cc: Likewise.
3216         * testsuite/20_util/is_trivially_default_constructible/value.cc:
3217         Likewise.
3218
3219 2019-05-20  Pádraig Brady  <pbrady@fb.com>
3220
3221         * libstdc++-v3/include/ext/new_allocator.h (deallocate): Pass the size
3222         to the deallocator with -fsized-deallocation.
3223
3224 2019-05-20  Jonathan Wakely  <jwakely@redhat.com>
3225
3226         * testsuite/experimental/memory_resource/new_delete_resource.cc: Fix
3227         test by passing correct alignment to deallocate function.
3228
3229 2019-05-18  Jonathan Wakely  <jwakely@redhat.com>
3230
3231         PR libstdc++/90520
3232         * python/libstdcxx/v6/printers.py (UniquePointerPrinter.__init__):
3233         Raise exception if unique_ptr tuple member has unknown structure.
3234         * python/libstdcxx/v6/xmethods.py (UniquePtrGetWorker.__call__):
3235         Adjust worker to support new __uniq_ptr_data base class. Do not
3236         assume field called _M_head_impl is the first tuple element.
3237
3238 2019-05-17  François Dumont  <fdumont@gcc.gnu.org>
3239
3240         * include/bits/stl_deque.h
3241         (_Deque_iterator<>::__ptr_to): Remove, use std::__ptr_rebind.
3242         (_Deque_base(_Deque_base&&, const allocator_type&)): New.
3243         (_Deque_base::_Deque_impl_data): New.
3244         (_Deque_base::_Deque_impl): Inherit latter.
3245         (_Deque_base::_Deque_impl::_M_swap_data): Move...
3246         (_Deque_base::_Deque_impl_data::_M_swap_data): ... here.
3247         (_Deque_base::_Deque_impl()): Add noexcept qualification.
3248         (_Deque_base::_Deque_impl(_Deque_impl&&, _Tp_alloc_type&&)): New.
3249         (_Deque_base::_Deque_impl::_M_get_Tp_allocator()): Remove static_cast.
3250         (deque<>::deque()): Default.
3251         (deque<>::deque(deque&&)): Default.
3252         (deque<>::deque(deque&&, const allocator_type&, false_type)): New.
3253         (deque<>::deque(deque&&, const allocator_type&, true_type)): New.
3254         (deque<>::deque(deque&&, const allocator_type&)): Delegate to latters.
3255         (deque<>::deque<_It>(_It, _It, const allocator_type&)): Use
3256         _M_range_initialize.
3257         (deque<>::assign<_It>(_It, _It)): Use _M_assign_aux.
3258         (deque<>::resize(size_type, const value_type&)): Share a single
3259         implementation.
3260         (deque<>::insert<_It>(const_iterator, _It, _It)): Use
3261         _M_range_insert_aux.
3262         [__cplusplus >= 201103L](_M_initialize_dispatch): Remove.
3263         [__cplusplus >= 201103L](_M_assign_dispatch): Remove.
3264         [__cplusplus >= 201103L](_M_insert_dispatch): Remove.
3265         * testsuite/23_containers/deque/allocator/default_init.cc: New.
3266
3267 2019-05-17  Jonathan Wakely  <jwakely@redhat.com>
3268
3269         PR libstdc++/90246
3270         * include/std/variant (holds_alternative, get, get_if): Improve
3271         static assertion messages.
3272         (bad_variant_access::bad_variant_access()): Change default message.
3273         (__throw_bad_variant_access(bool)): New overload.
3274         (get): Use new overload.
3275         (visit, visit<R>): Improve exception message.
3276
3277         * testsuite/20_util/variant/compile.cc: Fix narrowing test for ILP32
3278         targets. Add more cases from P0608R3.
3279         * testsuite/20_util/variant/run.cc: Add more cases from P0608R3.
3280
3281         * include/bits/random.h (seed_seq::param): Fix non-reserved name.
3282         * include/experimental/type_traits (is_detected_exact)
3283         (is_detected_exact_v): Likewise.
3284         * include/pstl/execution_defs.h (is_execution_policy)
3285         (is_execution_policy_v, __enable_if_execution_policy): Likewise.
3286         * include/pstl/execution_impl.h (__policy_traits): Likewise.
3287         * testsuite/17_intro/names.cc: Check for more non-reserved names.
3288         * testsuite/experimental/names.cc: New test.
3289
3290         PR libstdc++/85965
3291         * include/bits/hashtable.h (_Hashtable::~_Hashtable()): Remove static
3292         assertions from the destructor.
3293         * include/bits/hashtable_policy.h (_Hash_code_base::_M_hash_code):
3294         Move static_assert for hash function to here.
3295         (_Hash_table_base::_M_equals): Move static_assert for equality
3296         predicate to here.
3297         * include/bits/stl_tree.h (_Rb_tree::_S_value(_Const_Link_type)):
3298         Remove.
3299         (_Rb_tree::_S_key(_Const_Link_type)): Move assertions here. Access
3300         the value directly instead of calling _S_value.
3301         (_Rb_tree::_S_value(_Const_Base_ptr)): Remove.
3302         (_Rb_tree::_S_key(_Const_Base_ptr)): Do downcast and forward to
3303         _S_key(_Const_Link_type).
3304         * testsuite/23_containers/set/85965.cc: Check construction,
3305         destruction, assignment and size() do not trigger the assertions.
3306         * testsuite/23_containers/unordered_set/85965.cc: Likewise.
3307         * testsuite/23_containers/map/48101_neg.cc: Call find and adjust
3308         expected errors.
3309         * testsuite/23_containers/multimap/48101_neg.cc: Likewise.
3310         * testsuite/23_containers/multiset/48101_neg.cc: Likewise.
3311         * testsuite/23_containers/set/48101_neg.cc: Likewise.
3312         * testsuite/23_containers/unordered_map/48101_neg.cc: Likewise.
3313         * testsuite/23_containers/unordered_multimap/48101_neg.cc: Likewise.
3314         * testsuite/23_containers/unordered_multiset/48101_neg.cc: Likewise.
3315         * testsuite/23_containers/unordered_set/48101_neg.cc: Likewise.
3316
3317         * include/bits/invoke.h [__cplusplus < 201703L] (__invoke_r<void>):
3318         Use _GLIBCXX14_CONSTEXPR because void functions cannot be constexpr
3319         in C++11.
3320
3321         * doc/xml/manual/status_cxx2020.xml: Update P0608R3, P0777R1, and
3322         P1165R1 entries.
3323         * doc/html/*: Regenerate.
3324         * include/std/tuple (make_from_tuple): Use remove_reference_t instead
3325         of decay_t (P0777R1).
3326
3327 2019-05-17  François Dumont  <fdumont@gcc.gnu.org>
3328
3329         Move from state of allocators (LWG2593)
3330         * include/bits/stl_deque.h
3331         (_Deque_base(_Deque_base&&, false_type)): Remove.
3332         (_Deque_base(_Deque_base&&, true_type)): Remove.
3333         (_Deque_base(_Deque_base&&)): Adapt.
3334         (_Deque_base::_M_move_impl()): Remove.
3335         * testsuite/util/testsuite_allocator.h
3336         (propagating_allocator(propagating_allocator&&)): Preserve move from
3337         state.
3338         * testsuite/23_containers/deque/allocator/move_assign.cc (test02):
3339         Adapt.
3340         * testsuite/23_containers/forward_list/allocator/move_assign.cc (test02):
3341         Adapt.
3342         * testsuite/23_containers/list/allocator/move_assign.cc (test02): Adapt.
3343         * testsuite/23_containers/map/allocator/move_assign.cc (test02): Adapt.
3344         * testsuite/23_containers/multimap/allocator/move_assign.cc (test02):
3345         Adapt.
3346         * testsuite/23_containers/multiset/allocator/move_assign.cc (test02):
3347         Adapt.
3348         * testsuite/23_containers/set/allocator/move_assign.cc (test02): Adapt.
3349         * testsuite/23_containers/unordered_map/allocator/move_assign.cc
3350         (test02): Adapt.
3351         * testsuite/23_containers/unordered_multimap/allocator/move_assign.cc
3352         (test02): Adapt.
3353         * testsuite/23_containers/unordered_multiset/allocator/move_assign.cc
3354         (test02): Adapt.
3355         * testsuite/23_containers/unordered_set/allocator/move_assign.cc
3356         (test02): Adapt.
3357         * testsuite/23_containers/vector/allocator/move_assign.cc (test02):
3358         Adapt.
3359         * testsuite/23_containers/vector/bool/allocator/move_assign.cc (test02):
3360         Adapt.
3361         * testsuite/21_strings/basic_string/allocator/char/move_assign.cc
3362         (test02): Adapt.
3363         * testsuite/21_strings/basic_string/allocator/wchar_t/move_assign.cc
3364         (test02): Adapt.
3365
3366 2019-05-16  Jonathan Wakely  <jwakely@redhat.com>
3367
3368         * src/c++17/fs_ops.cc (absolute(const path&, error_code&))
3369         [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Remove bogus assertion.
3370
3371         * include/std/variant (__overload_set): Remove.
3372         (_Arr): New helper.
3373         (_Build_FUN): New class template to define a single FUN overload,
3374         with specializations to prevent unwanted conversions, as per P0608R3.
3375         (_Build_FUNs): New class template to build an overload set of FUN.
3376         (_FUN_type): New alias template to perform overload resolution.
3377         (__accepted_type): Use integer_constant base for failure case. Use
3378         _FUN_type for successful case.
3379         (variant::__accepted_index): Use _Tp instead of _Tp&&.
3380         (variant::variant(_Tp&&)): Likewise.
3381         (variant::operator=(_Tp&&)): Likewise.
3382
3383         * include/std/variant (_Variant_storage<false, _Types...>::_M_reset):
3384         Replace raw visitation with a runtime check for the valueless state
3385         and a non-raw visitor.
3386         (_Variant_storage<false, _Types...>::_M_reset_impl): Remove.
3387         (variant::index()): Remove branch.
3388         (variant::swap(variant&)): Use valueless_by_exception() instead of
3389         comparing the index to variant_npos, and add likelihood attribute.
3390
3391         * include/bits/hashtable_policy.h (_Equal_helper): Remove.
3392         (_Hashtable_base::_Equal_hash_code): Define new class template.
3393         (_Hashtable_base::_M_equals): Use _Equal_hash_code instead of
3394         _Equal_helper.
3395
3396         * include/bits/hashtable_policy.h (_Hashtable_ebo_helper::_S_get):
3397         Replace with _M_get non-static member function.
3398         (_Hashtable_ebo_helper::_S_cget): Replace with _M_cget non-static
3399         member function.
3400         (_Hash_code_base, _Local_iterator_base, _Hashtable_base):
3401         (_Hashtable_alloc): Adjust to use non-static members of EBO helper.
3402
3403         * include/bits/hashtable_policy.h (_Hash_code_base::_M_swap): Use
3404         _S_get accessors for members in EBO helpers.
3405         (_Hash_code_base::_M_extract(), _Hash_code_base::_M_ranged_hash())
3406         (_Hash_code_base::_M_h1(), _Hash_code_base::_M_h2()): Remove non-const
3407         overloads.
3408         (_Hashtable_base::_M_swap): Use _S_get accessors for members in EBO
3409         helpers.
3410         (_Hashtable_base::_M_eq()): Remove non-const overload.
3411
3412 2019-05-15  Jonathan Wakely  <jwakely@redhat.com>
3413
3414         * include/std/variant (visit, visit<R>): Qualify calls to __do_visit.
3415
3416 2019-05-14  Jonathan Wakely  <jwakely@redhat.com>
3417
3418         * testsuite/util/testsuite_allocator.h (NullablePointer::operator bool):
3419         Fix return value.
3420
3421 2019-05-14  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
3422
3423         * config/os/solaris/solaris2.10: Move to ...
3424         * config/os/solaris: ... this.
3425         * configure.host (os_include_dir): Adapt.
3426         (abi_baseline_pair): Remove Solaris 10 handling.
3427         * config/abi/post/i386-solaris2.10: Remove.
3428         * config/abi/post/sparc-solaris2.10: Remove.
3429         * config/abi/post/i386-solaris2.11: Rename to ...
3430         * config/abi/post/i386-solaris: ... this.
3431         * config/abi/post/sparc-solaris2.11: Rename to ...
3432         * config/abi/post/sparc-solaris: ... this.
3433
3434         * libsupc++/new_opa.cc [_GLIBCXX_HAVE_MEMALIGN] [__sun]: Remove
3435         workaround.
3436
3437         * testsuite/ext/enc_filebuf/char/13598.cc: Remove *-*-solaris2.10
3438         xfail.
3439
3440 2019-05-14  Jonathan Wakely  <jwakely@redhat.com>
3441
3442         * include/std/variant (__visit_with_index): Remove typedef.
3443         (__deduce_visit_result): New tag type.
3444         (__raw_visit, __raw_idx_visit): New helper functions for "raw"
3445         visitation of possibly-valueless variants, forwarding to __do_visit
3446         with the relevant tag type.
3447         (_Variant_storage<false, _Types...>::_M_reset_impl): Use __raw_visit
3448         and make lambda return void.
3449         (__variant_construct): Likewise.
3450         (_Copy_assign_base::operator=, _Move_assign_base::operator=): Use
3451         __raw_idx_visit and make lambda return void.
3452         (_Multi_array::__untag_result): Add metafunction to check the function
3453         pointer type for a tag type that dictates the kind of visitation.
3454         (_Multi_array<_Ret(*)(_Visitor, _Variants...), __first, __rest...>):
3455         Use decltype(auto) instead of tagged function pointer type.
3456         (__gen_vtable_impl): Remove bool non-type parameter and unused
3457         _Variant_tuple parameter.
3458         (__gen_vtable_impl::__visit_invoke_impl): Remove.
3459         (__gen_vtable_impl::__do_visit_invoke): Remove.
3460         (__gen_vtable_impl::__do_visit_invoke_r): Remove.
3461         (__gen_vtable_impl::__visit_invoke): Use if-constexpr and __invoke_r
3462         for the visit<R> case, rather than dispatching to separate functions.
3463         (_VARIANT_RELATION_FUNCTION_TEMPLATE): Use __raw_idx_visit and make
3464         lambda return void.
3465         (variant::swap): Likewise.
3466         (__do_visit): Replace two non-type template parameters with a single
3467         type parameter, so that the caller must specify the visitor's return
3468         type (or one of the tag types).
3469         (visit): Deduce a return type from the visitor and use the
3470         __deduce_visit_result tag to enforce that all overloads return the
3471         same type.
3472         (visit<R>): Call __do_visit<R> with explicit result type.
3473         (__variant_hash_call_base_impl::operator()): Use __raw_visit and make
3474         lambda return void.
3475
3476 2019-05-14  Nina Dinka Ranns  <dinka.ranns@gmail.com>
3477
3478         nonesuch is insufficiently useless (lwg2996)
3479         * include/std/type_traits (struct __nonesuch): Added private base
3480         class to make __nonesuch not an aggregate and removed deleted default
3481         constructor.
3482         * include/bits/stl_pair.h (struct __nonesuch_no_braces): Removed.
3483         (operator=(const pair&)): Use __nonesuch instead of
3484         __nonesuch_no_braces.
3485         (operator=(pair&&)): Likewise
3486         * include/std/tuple (operator=(const tuple&)): Use __nonesuch instead
3487         of __nonesuch_no_braces.
3488         (operator=(tuple&&)): Likewise
3489         * include/experimental/type_traits (struct nonesuch): Added private
3490         base class to make nonesuch not an aggregate and removed deleted
3491         default constructor.
3492         * testsuite/20_util/nonesuch/nonesuch.cc: New.
3493         * testsuite/experimental/type_traits/nonesuch.cc: New.
3494
3495 2019-05-14  Jonathan Wakely  <jwakely@redhat.com>
3496
3497         * include/bits/std_function.h (_Simple_type_wrapper): Remove.
3498         (_Function_handler): Remove partial specializations for void return
3499         types and pointers to member.
3500         (_Function_handler::_M_manager): Adapt to removal of
3501         _Simple_type_wrapper.
3502         (_Function_handler::_M_invoke): Use __invoke_r instead of __invoke.
3503         * include/std/functional (_Bind_result::__enable_if_void)
3504         (_Bind_result::__disable_if_void): Remove sfinae helpers.
3505         (_Bind_result::__call): Use __invoke_r and remove overloads for void
3506         return types.
3507         * include/std/future (__future_base::_Task_state::_M_run)
3508         (__future_base::_Task_state::_M_run_delayed): Use __invoke_r and
3509         change return type of lambda expressions.
3510
3511         * include/bits/invoke.h (__invoke_r): Define new function implementing
3512         the INVOKE<R> pseudo-function.
3513         * testsuite/20_util/function_objects/invoke/1.cc: Add more tests.
3514         * testsuite/20_util/function_objects/invoke/2.cc: New test.
3515
3516         * include/std/type_traits (__is_nt_convertible_helper): Define it
3517         unconditionally, not only for C++20.
3518         (__is_nothrow_convertible): Define internal trait for use in C++11.
3519         (__is_nt_invocable_impl: Fix by using __is_nothrow_convertible.
3520         (is_invocable_r_v, is_nothrow_invocable_r_v): Add missing parameter.
3521         * testsuite/20_util/is_nothrow_convertible/value_ext.cc: New test.
3522         * testsuite/20_util/is_nothrow_convertible/value.cc: Check with type
3523         that has nothrow explicit conversion but potentially-throwing implicit
3524         conversion.
3525         * testsuite/20_util/is_nothrow_invocable/value.cc: Likewise.
3526         * testsuite/20_util/is_nothrow_invocable/value_ext.cc: Fix helper
3527         function to only consider implicit conversions.
3528         * testsuite/20_util/tuple/cons/noexcept_specs.cc: Add comment.
3529
3530         * include/std/iterator: Include <iosfwd> instead of <istream> and
3531         <ostream>.
3532
3533         * include/bits/stl_tree.h (_Rb_tree::erase(const Key*, const Key*)):
3534         Remove unused, non-standard function.
3535
3536         * include/bits/regex.h (match_results::max_size()): Adjust return
3537         value to account for prefix/suffix/unmatched subs.
3538         (match_results::_M_resize(unsigned int)): Use _Base_type::assign to
3539         reset the contained sub matches.
3540         (match_results::_M_establish_failed_match(_Bi_iter)): Add new member
3541         function to set result state following a failed match.
3542         * include/bits/regex.tcc (__regex_algo_impl): Remove loop to set
3543         sub_match states after _M_resize. Use _M_establish_failed_match.
3544
3545         PR libstdc++/69724
3546         * include/std/thread (thread::_State_impl, thread::_S_make_state):
3547         Replace single _Callable parameter with variadic _Args pack, to
3548         forward them directly to the tuple of decayed copies.
3549         * testsuite/30_threads/thread/cons/69724.cc: New test.
3550
3551 2019-05-14  Nina Dinka Ranns  <dinka.ranns@gmail.com>
3552
3553         Inconsistency wrt Allocators in basic_string assignment (LWG2579)
3554         * include/bits/basic_string.h: (operator=(const basic_string&):
3555         Move allocator decision to assign.
3556         (assign(const basic_string&)): Move allocator decision here.
3557         * testsuite/21_strings/basic_string/allocator/char/copy_assign.cc:
3558         Add tests.
3559         * testsuite/21_strings/basic_string/allocator/wchar_t/copy_assign.cc:
3560         Add tests.
3561
3562 2019-05-14  Jonathan Wakely  <jwakely@redhat.com>
3563
3564         * testsuite/util/testsuite_allocator.h (memory_resource)
3565         (default_resource_mgr): Fix indentation.
3566
3567         * testsuite/20_util/allocator_traits/members/allocate_hint_nonpod.cc:
3568         Use operator-> to access raw pointer member.
3569         * testsuite/23_containers/vector/59829.cc: Likewise.
3570         * testsuite/23_containers/vector/bool/80893.cc: Likewise.
3571         * testsuite/libstdc++-prettyprinters/cxx11.cc: Use NullablePointer.
3572         * testsuite/util/testsuite_allocator.h (NullablePointer): New utility
3573         for tests.
3574         (PointerBase, PointerBase_void): Derive from NullablePointer and use
3575         its constructors and equality operators. Change converting
3576         constructors to use operator-> to access private member of the other
3577         pointer type.
3578         (PointerBase_void::operator->()): Add, for access to private member.
3579         (operator-(PointerBase, PointerBase)): Change to hidden friend.
3580         (operator==(PointerBase, PointerBase)): Remove.
3581         (operator!=(PointerBase, PointerBase)): Remove.
3582
3583         * python/libstdcxx/v6/printers.py (UniquePointerPrinter.__init__): Do
3584         not assume field called _M_head_impl is the first tuple element.
3585         * testsuite/libstdc++-prettyprinters/compat.cc: Make tuple
3586         implementation more accurate.
3587         * testsuite/libstdc++-prettyprinters/cxx11.cc: Check unique_ptr with
3588         empty pointer type and non-empty deleter.
3589
3590         LWG 2899 - Make is_move_constructible correct for unique_ptr
3591         * include/bits/unique_ptr.h (__uniq_ptr_impl): Add move constructor,
3592         move assignment operator.
3593         (__uniq_ptr_impl::release(), __uniq_ptr_impl::reset(pointer)): Add.
3594         (__uniq_ptr_data): New class template with conditionally deleted
3595         special members.
3596         (unique_ptr, unique_ptr<T[], D>): Change type of data member from
3597         __uniq_ptr_impl<T, D> to __uniq_ptr_data<T, D>. Define move
3598         constructor and move assignment operator as defaulted.
3599         (unique_ptr::release(), unique_ptr<T[], D>::release()): Forward to
3600         __uniq_ptr_impl::release().
3601         (unique_ptr::reset(pointer), unique_ptr<T[], D>::reset<U>(U)): Forward
3602         to __uniq_ptr_impl::reset(pointer).
3603         * python/libstdcxx/v6/printers.py (UniquePointerPrinter.__init__):
3604         Check for new __uniq_ptr_data type.
3605         * testsuite/20_util/unique_ptr/dr2899.cc: New test.
3606
3607 2019-05-13  Jonathan Wakely  <jwakely@redhat.com>
3608
3609         PR libstdc++/90454.cc path construction from void*
3610         * include/bits/fs_path.h (path::_Path): Use remove_pointer so that
3611         pointers to void are rejected as well as void.
3612         * include/experimental/bits/fs_path.h (path::_Path): Likewise.
3613         * testsuite/27_io/filesystem/path/construct/80762.cc: Also check
3614         pointers to void.
3615         * testsuite/experimental/filesystem/path/construct/80762.cc: Likewise.
3616
3617         * doc/xml/manual/policy_data_structures.xml: Comment out stray
3618         <remark> elements. Fix formatting of bibliography references.
3619
3620 2019-05-13  Edward Smith-Rowland  <3dw4rd@verizon.net>
3621
3622         * doc/xml/manual/status_cxx2020.xml: Document P0811R3 status.
3623
3624 2019-05-13  Jonathan Wakely  <jwakely@redhat.com>
3625
3626         Remove Profile Mode, deprecated since 7.1.0
3627         * doc/Makefile.am: Remove XML file for profile mode docs.
3628         * doc/Makefile.in: Regenerate.
3629         * doc/xml/authors.xml: Remove authors of profile mode docs.
3630         * doc/xml/manual/appendix_contributing.xml: Remove mention of profile
3631         mode.
3632         * doc/xml/manual/debug.xml: Likewise.
3633         * doc/xml/manual/evolution.xml: Document removal of profile mode.
3634         * doc/xml/manual/profile_mode.xml: Remove profile mode docs.
3635         * doc/xml/manual/spine.xml: Remove profile mode author credit.
3636         * doc/xml/manual/test.xml: Remove docs for dg-require-profile-mode
3637         directive.
3638         * doc/xml/manual/using.xml: Remove docs for profile mode headers and
3639         macro.
3640         * doc/html/*: Regenerate.
3641         * include/Makefile.am: Remove profile mode headers.
3642         * include/Makefile.in: Regenerate.
3643         * include/bits/c++config (std::__profile): Remove namespace.
3644         [_GLIBCXX_PROFILE]: Remove checks for macro.
3645         * include/profile/array: Remove.
3646         * include/profile/base.h: Remove.
3647         * include/profile/bitset: Remove.
3648         * include/profile/deque: Remove.
3649         * include/profile/forward_list: Remove.
3650         * include/profile/impl/profiler.h: Remove.
3651         * include/profile/impl/profiler_algos.h: Remove.
3652         * include/profile/impl/profiler_container_size.h: Remove.
3653         * include/profile/impl/profiler_hash_func.h: Remove.
3654         * include/profile/impl/profiler_hashtable_size.h: Remove.
3655         * include/profile/impl/profiler_list_to_slist.h: Remove.
3656         * include/profile/impl/profiler_list_to_vector.h: Remove.
3657         * include/profile/impl/profiler_map_to_unordered_map.h: Remove.
3658         * include/profile/impl/profiler_node.h: Remove.
3659         * include/profile/impl/profiler_state.h: Remove.
3660         * include/profile/impl/profiler_trace.h: Remove.
3661         * include/profile/impl/profiler_vector_size.h: Remove.
3662         * include/profile/impl/profiler_vector_to_list.h: Remove.
3663         * include/profile/iterator_tracker.h: Remove.
3664         * include/profile/list: Remove.
3665         * include/profile/map: Remove.
3666         * include/profile/map.h: Remove.
3667         * include/profile/multimap.h: Remove.
3668         * include/profile/multiset.h: Remove.
3669         * include/profile/ordered_base.h: Remove.
3670         * include/profile/set: Remove.
3671         * include/profile/set.h: Remove.
3672         * include/profile/unordered_base.h: Remove.
3673         * include/profile/unordered_map: Remove.
3674         * include/profile/unordered_set: Remove.
3675         * include/profile/vector: Remove.
3676         * scripts/run_doxygen: Do not process profile mode headers.
3677         * testsuite/23_containers/array/element_access/60497.cc: Don't use
3678         profile mode type.
3679         * testsuite/23_containers/array/specialized_algorithms/swap_cxx17.cc:
3680         Remove dg-skip-if for profile mode.
3681         * testsuite/23_containers/forward_list/capacity/1.cc: Remove
3682         preprocessor check for profile mode.
3683         * testsuite/23_containers/list/capacity/29134.cc: Likewise.
3684         * testsuite/23_containers/map/modifiers/extract.cc: Remove dg-skip-if
3685         for profile mode.
3686         * testsuite/23_containers/map/modifiers/insert_or_assign/1.cc:
3687         Likewise.
3688         * testsuite/23_containers/map/modifiers/try_emplace/1.cc: Likewise.
3689         * testsuite/23_containers/multimap/modifiers/extract.cc: Likewise.
3690         * testsuite/23_containers/multiset/modifiers/extract.cc: Likewise.
3691         * testsuite/23_containers/set/modifiers/extract.cc: Likewise.
3692         * testsuite/23_containers/unordered_map/modifiers/extract.cc:
3693         Likewise.
3694         * testsuite/23_containers/unordered_multimap/modifiers/extract.cc:
3695         Likewise.
3696         * testsuite/23_containers/unordered_multiset/modifiers/extract.cc:
3697         Likewise.
3698         * testsuite/23_containers/unordered_set/modifiers/extract.cc:
3699         Likewise.
3700         * testsuite/23_containers/vector/bool/capacity/29134.cc: Remove
3701         preprocessor check for profile mode.
3702         * testsuite/23_containers/vector/bool/modifiers/insert/31370.cc:
3703         Likewise.
3704         * testsuite/23_containers/vector/modifiers/insert_vs_emplace.cc:
3705         Remove dg-skip-if for profile mode.
3706         * testsuite/25_algorithms/binary_search/partitioned.cc: Likewise.
3707         * testsuite/25_algorithms/equal_range/partitioned.cc: Likewise.
3708         * testsuite/25_algorithms/lexicographical_compare/71545.cc: Likewise.
3709         * testsuite/25_algorithms/lower_bound/partitioned.cc: Likewise.
3710         * testsuite/25_algorithms/upper_bound/partitioned.cc: Likewise.
3711         * testsuite/Makefile.am: Remove profile_flags variable and
3712         * testsuite/Makefile.am: Remove profile_flags variable and
3713         check-profile target.
3714         * testsuite/Makefile.in: Regenerate.
3715         * testsuite/ext/profile/all.cc: Remove.
3716         * testsuite/ext/profile/mutex_extensions_neg.cc: Remove.
3717         * testsuite/ext/profile/profiler_algos.cc: Remove.
3718         * testsuite/ext/profile/replace_new.cc: Remove.
3719         * testsuite/ext/throw_allocator/deallocate_global.cc: Remove
3720         preprocessor check for profile mode.
3721         * testsuite/ext/throw_allocator/deallocate_local.cc: Likewise.
3722         * testsuite/lib/libstdc++.exp (check_v3_target_profile_mode): Remove.
3723         (check_v3_target_normal_mode): Do not check for profile mode macro.
3724         * testsuite/libstdc++-prettyprinters/80276.cc: Remove dg-skip-if for
3725         profile mode.
3726         * testsuite/libstdc++-prettyprinters/compat.cc: Likewise.
3727         * testsuite/libstdc++-prettyprinters/cxx11.cc: Likewise.
3728         * testsuite/libstdc++-prettyprinters/cxx17.cc: Likewise.
3729         * testsuite/libstdc++-prettyprinters/debug.cc: Likewise.
3730         * testsuite/libstdc++-prettyprinters/debug_cxx11.cc: Likewise.
3731         * testsuite/libstdc++-prettyprinters/libfundts.cc: Likewise.
3732         * testsuite/libstdc++-prettyprinters/simple.cc: Likewise.
3733         * testsuite/libstdc++-prettyprinters/simple11.cc: Likewise.
3734         * testsuite/libstdc++-prettyprinters/whatis.cc: Likewise.
3735         * testsuite/libstdc++-prettyprinters/whatis2.cc: Likewise.
3736
3737         Remove array_allocator extension, deprecated since 4.9.0
3738         * doc/xml/manual/allocator.xml: Remove documentation for
3739         array_allocator.
3740         * doc/xml/manual/evolution.xml: Document array_allocator removal.
3741         * doc/xml/manual/using.xml: Remove header from documentation.
3742         * include/Makefile.am: Remove <ext/array_allocator.h> header.
3743         * include/Makefile.in: Regenerate.
3744         * include/ext/array_allocator.h: Remove.
3745         * include/precompiled/extc++.h: Do not include removed header.
3746         * testsuite/ext/array_allocator/1.cc: Remove.
3747         * testsuite/ext/array_allocator/2.cc: Remove.
3748         * testsuite/ext/array_allocator/26875.cc: Remove.
3749         * testsuite/ext/array_allocator/3.cc: Remove.
3750         * testsuite/ext/array_allocator/check_deallocate_null.cc: Remove.
3751         * testsuite/ext/array_allocator/check_delete.cc: Remove.
3752         * testsuite/ext/array_allocator/check_new.cc: Remove.
3753         * testsuite/ext/array_allocator/variadic_construct.cc: Remove.
3754         * testsuite/ext/headers.cc: Do not include removed header.
3755
3756 2019-05-11  François Dumont  <fdumont@gcc.gnu.org>
3757
3758         * include/bits/stl_bvector.h
3759         (operator==(const _Bit_iterator_base&, const _Bit_iterator_base&)):
3760         Make hidden friend.
3761         (operator<(const _Bit_iterator_base&, const _Bit_iterator_base&)):
3762         Likewise.
3763         (operator!=(const _Bit_iterator_base&, const _Bit_iterator_base&)):
3764         Likewise.
3765         (operator>(const _Bit_iterator_base&, const _Bit_iterator_base&)):
3766         Likewise.
3767         (operator<=(const _Bit_iterator_base&, const _Bit_iterator_base&)):
3768         Likewise.
3769         (operator>=(const _Bit_iterator_base&, const _Bit_iterator_base&)):
3770         Likewise.
3771         (operator-(const _Bit_iterator_base&, const _Bit_iterator_base&)):
3772         Likewise.
3773         (_Bit_iterator::operator+(difference_type)): Likewise and allow NRVO
3774         copy elision.
3775         (_Bit_iterator::operator-(difference_type)): Likewise.
3776         (operator+(ptrdiff_t, const _Bit_iterator&)): Make hidden friend.
3777         (_Bit_const_iterator::operator+(difference_type)): Likewise and allow
3778         NRVO copy elision.
3779         (_Bit_const_iterator::operator-(difference_type)): Likewise.
3780         (operator+(ptrdiff_t, const _Bit_const_iterator&)): Make hidden friend.
3781
3782 2019-05-10  Jonathan Wakely  <jwakely@redhat.com>
3783
3784         PR libstdc++/81266
3785         * testsuite/util/thread/all.h: Do not use remove_pointer for
3786         std::thread::native_handle_type.
3787
3788         PR libstdc++/90397
3789         * include/std/variant (_Variant_storage<false, Types...>::_M_storage())
3790         (_Variant_storage<true, Types...>::_M_reset()))
3791         (_Variant_storage<true, Types...>::_M_storage())): Add noexcept.
3792         (__get_storage): Likewise.
3793         (variant): Add noexcept to friend declarations for __get and
3794         __get_storage.
3795
3796         PR libstdc++/90388
3797         * include/bits/unique_ptr.h (default_delete, default_delete<T[]>):
3798         Use _Require for constraints.
3799         (operator>(nullptr_t, const unique_ptr<T,D>&)): Implement exactly as
3800         per the standard.
3801         (__uniq_ptr_hash): New base class with conditionally-disabled call
3802         operator.
3803         (hash<unique_ptr<T,D>>): Derive from __uniq_ptr_hash.
3804         * testsuite/20_util/default_delete/48631_neg.cc: Adjust dg-error line.
3805         * testsuite/20_util/unique_ptr/hash/90388.cc: New test.
3806
3807         * include/bits/shared_ptr.h: Improve docs.
3808         * include/bits/shared_ptr_base.h: Likewise.
3809         * include/bits/stl_uninitialized.h: Likewise.
3810         * include/bits/unique_ptr.h: Likewise.
3811         * libsupc++/new: Likewise.
3812
3813 2019-05-09  François Dumont  <fdumont@gcc.gnu.org>
3814
3815         * include/bits/stl_deque.h
3816         (operator==(const _Deque_iterator<>&, const _Deque_iterator<>&)):
3817         Make hidden friend.
3818         (operator!=(const _Deque_iterator<>&, const _Deque_iterator<>&)):
3819         Likewise.
3820         (operator<(const _Deque_iterator<>&, const _Deque_iterator<>&)):
3821         Likewise.
3822         (operator<=(const _Deque_iterator<>&, const _Deque_iterator<>&)):
3823         Likewise.
3824         (operator>(const _Deque_iterator<>&, const _Deque_iterator<>&)):
3825         Likewise.
3826         (operator>=(const _Deque_iterator<>&, const _Deque_iterator<>&)):
3827         Likewise.
3828         (_Deque_iterator<>::operator+(difference_type)): Likewise and allow NRVO
3829         copy elision.
3830         (_Deque_iterator<>::operator-(difference_type)): Likewise.
3831
3832 2019-05-08  François Dumont  <fdumont@gcc.gnu.org>
3833
3834         PR libstdc++/90277
3835         * testsuite/23_containers/unordered_multiset/insert/24061-multiset.cc
3836         (test01): Reserve for number of insertions to avoid rehash during test.
3837         * testsuite/23_containers/unordered_multimap/insert/24061-multimap.cc
3838         (test01): Likewise.
3839         * testsuite/23_containers/unordered_multimap/insert/24061-multimap.cc
3840         (test01): Likewise.
3841         (test02): Likewise.
3842         (test03): Likewise.
3843
3844 2019-05-08  Jonathan Wakely  <jwakely@redhat.com>
3845
3846         * include/experimental/bits/fs_path.h: Improve docs.
3847         * include/experimental/bits/net.h: Fix wrong header name in comment.
3848         Do not document implementation details.
3849         * include/experimental/netfwd: Fix doxygen grouping.
3850
3851 2019-05-07  Jonathan Wakely  <jwakely@redhat.com>
3852
3853         * include/bits/stl_pair.h: Improve docs.
3854         * include/std/tuple: Likewise.
3855
3856         * doc/doxygen/doxygroups.cc (std::literals): Add documentation for
3857         inline namespace.
3858         * include/std/chrono: Improve docs.
3859         * include/std/ratio: Do not document implementation details.
3860         * testsuite/20_util/ratio/cons/cons_overflow_neg.cc: Adjust dg-error
3861         line numbers.
3862         * testsuite/20_util/ratio/operations/ops_overflow_neg.cc: Likewise.
3863
3864         PR libstdc++/89102
3865         * doc/xml/manual/intro.xml: Document DR 2408 and 2465 changes.
3866         * include/std/chrono (__duration_common_type_wrapper): Replace with ...
3867         (__duration_common_type): New helper.
3868         (common_type<chrono::duration<R1, P2>, chrono::duration<R2, P2>>): Use
3869         __duration_common_type.
3870         (__timepoint_common_type_wrapper): Replace with ...
3871         (__timepoint_common_type): New helper.
3872         (common_type<chrono::time_point<C, D2>, chrono::time_point<C, D2>>):
3873         Use __time_point_common_type.
3874         * include/std/type_traits (common_type<>): Define, as per LWG 2408.
3875         (__common_type_impl): If either argument is transformed by decay,
3876         use the common_type of the decayed types.
3877         (__common_type_impl<_Tp, _Up, _Tp, _Up>): If the types are already
3878         decayed, use __do_common_type_impl to get the common_type.
3879         (common_type<_Tp>): Use common_type<_Tp, _Tp>.
3880         (__do_member_type_wrapper, __member_type_wrapper)
3881         (__expanded_common_type_wrapper): Remove.
3882         (__common_type_pack, __common_type_fold): New helpers.
3883         (common_type<_Tp, _Up, _Vp...>): Use new helpers instead of
3884         __member_type_wrapper and __expanded_common_type_wrapper.
3885         * testsuite/20_util/common_type/requirements/explicit_instantiation.cc:
3886         Test zero-length template argument list.
3887         * testsuite/20_util/common_type/requirements/sfinae_friendly_1.cc:
3888         Test single argument cases and argument types that should decay.
3889         * testsuite/20_util/common_type/requirements/sfinae_friendly_2.cc:
3890         Adjust expected error.
3891         * testsuite/20_util/duration/literals/range_neg.cc: Use zero for
3892         dg-error lineno.
3893         * testsuite/20_util/duration/requirements/typedefs_neg1.cc: Likewise.
3894         * testsuite/20_util/duration/requirements/typedefs_neg2.cc: Likewise.
3895         * testsuite/20_util/duration/requirements/typedefs_neg3.cc: Likewise.
3896
3897         * doc/xml/manual/intro.xml: Fix DR 2537 and DR 2566 confusion.
3898
3899 2019-05-01  Nina Dinka Ranns  <dinka.ranns@gmail.com>
3900
3901         Make allocator propagation more consistent for
3902         operator+(basic_string) (P1165R1)
3903         * include/bits/basic_string.h
3904         (operator+(basic_string&&, basic_string&&): Changed resulting
3905         allocator to always be the one from the first parameter.
3906         * include/bits/basic_string.tcc
3907         (operator+(const _CharT*, const basic_string&)): Changed
3908         resulting allocator to be SOCCC on the second parameter's allocator.
3909         (operator+(_CharT, const basic_string&)): Likewise.
3910         * testsuite/21_strings/basic_string/allocator/char/operator_plus.cc:
3911         New.
3912         * testsuite/21_strings/basic_string/allocator/wchar_t/operator_plus.cc:
3913         New.
3914
3915 2019-05-07  Jonathan Wakely  <jwakely@redhat.com>
3916
3917         * include/bits/regex.h: Improve docs.
3918         * include/bits/regex.tcc: Do not document implementation details.
3919
3920         * testsuite/19_diagnostics/error_code/hash.cc: New test.
3921
3922 2019-05-06  François Dumont  <fdumont@gcc.gnu.org>
3923
3924         * python/libstdcxx/v6/printers.py (add_one_template_type_printer):
3925         Add type printer for container types in std::__debug namespace.
3926         * testsuite/lib/gdb-test.exp (whatis-regexp-test): New.
3927         (gdb-tests): Use distinct parameters for the type of test and use of
3928         regex.
3929         (gdb-test): Check for regex test even if 'whatis' test.
3930         * testsuite/libstdc++-prettyprinters/80276.cc: Adapt for _GLIBCXX_DEBUG
3931         mode.
3932         * testsuite/libstdc++-prettyprinters/cxx11.cc: Likewise.
3933         * testsuite/libstdc++-prettyprinters/cxx17.cc: Likewise.
3934         * testsuite/libstdc++-prettyprinters/libfundts.cc: Likewise.
3935         * testsuite/libstdc++-prettyprinters/simple.cc: Likewise.
3936         * testsuite/libstdc++-prettyprinters/simple11.cc: Likewise.
3937         * testsuite/libstdc++-prettyprinters/whatis.cc: Likewise.
3938         * testsuite/libstdc++-prettyprinters/whatis2.cc: Likewise.
3939
3940 2019-05-04  Jonathan Wakely  <jwakely@redhat.com>
3941
3942         * include/std/system_error (error_category): Fix comment.
3943
3944         PR libstdc++/90299
3945         * src/c++17/fs_ops.cc (absolute(const path&)): Report an error if the
3946         argument is an empty path.
3947         (absolute(const path&, error_code&)): Use invalid_argument as error
3948         code instead of no_such_file_or_directory.
3949         * testsuite/27_io/filesystem/operations/absolute.cc: Check handling
3950         of non-existent paths and empty paths with both overloads of absolute.
3951
3952         * include/std/system_error (error_category, error_code)
3953         (error_condition): Improve docs.
3954         * libsupc++/exception: Add missing @addtogroup Doxygen command.
3955         * libsupc++/exception_ptr.h (exception_ptr): Link equality operators
3956         to class documentation. Suppress documentation for implementation
3957         details.
3958         * libsupc++/nested_exception.h (throw_with_nested, rethrow_if_nested):
3959         Suppress documentation for implementation details.
3960
3961         * include/std/system_error (error_code): Remove friend declaration
3962         for hash<error_code>.
3963         (hash<error_code>::operator()): Use public member functions to access
3964         value and category.
3965         (hash<error_condition>::operator()): Use address of category, not
3966         its object representation.
3967         * src/c++11/compatibility-c++0x.cc (hash<error_code>::operator()):
3968         Use public member functions to access value and category.
3969         * testsuite/19_diagnostics/error_condition/hash.cc: New test.
3970
3971 2019-05-04  François Dumont  <fdumont@gcc.gnu.org>
3972
3973         * include/bits/hashtable.h (_Hashtable<>::rehash): Review comment.
3974         * include/bits/hashtable_policy.h
3975         (_Prime_rehash_policy::_M_bkt_for_elements): Use __builtin_ceill.
3976         (_Power2_rehash_policy::_M_bkt_for_elements): Likewise.
3977         (_Power2_rehash_policy::_M_next_bkt): Enforce returning a result not
3978         smaller than input value rather than always greater. Preserve
3979         _M_next_resize if called with 0 input. Use __builtin_floorl.
3980         (_Power2_rehash_policy::_M_need_rehash): Rehash only if number of
3981         elements + number of insertions is greater than _M_next_resize. Start
3982         with 11 buckets if not told otherwise. Use __builtin_floorl.
3983         (_Rehash_base<>::reserve): Use rehash policy _M_bkt_for_elements.
3984         * src/c++11/hashtable_c++0x.cc (_Prime_rehash_policy::_M_next_bkt):
3985         Preserve _M_next_resize if called with 0 input. Use __builtin_floorl.
3986         (_Prime_rehash_policy::_M_need_rehash): Start with 11 buckets if not
3987         told otherwise. Use __builtin_floorl.
3988         * testsuite/23_containers/unordered_set/hash_policy/71181.cc: Adapt test
3989         to also validate _Power2_rehash_policy.
3990         * testsuite/23_containers/unordered_set/hash_policy/power2_rehash.cc:
3991         Adapt.
3992
3993 2019-05-03  Jonathan Wakely  <jwakely@redhat.com>
3994
3995         PR libstdc++/61761
3996         * testsuite/26_numerics/complex/proj.cc: Don't assume <cmath> defines
3997         std::copysign.
3998
3999         PR libstdc++/52119
4000         * include/ext/numeric_traits.h (__glibcxx_min): Avoid integer
4001         overflow warning with -Wpedantic -Wsystem-headers.
4002
4003 2019-05-02  Jonathan Wakely  <jwakely@redhat.com>
4004
4005         PR libstdc++/90314
4006         * include/bits/c++config (_GLIBCXX_NOEXCEPT_IF): Use variadic macro.
4007         * include/bits/move.h (swap): Remove extra parentheses.
4008
4009         * include/experimental/bits/lfts_config.h: Improve doc markup.
4010         * include/experimental/optional: Improve docs.
4011         (_Has_addressof_mem, _Has_addressof_free, _Has_addressof)
4012         (__constexpr_addressof): Remove.
4013         (optional::operator->()): Use std::__addressof().
4014         * include/std/optional (optional::operator->()): Adjust whitespace.
4015         * testsuite/experimental/optional/constexpr/observers/2.cc: Check
4016         that operator-> is still constexpr with overloaded operator&. Change
4017         to compile-only test.
4018         * testsuite/experimental/optional/constexpr/observers/3.cc: Change to
4019         compile-only test.
4020
4021         * include/bits/shared_ptr.h: Improve docs.
4022         * include/bits/shared_ptr_atomic.h: Likewise.
4023         * include/bits/unique_ptr.h: Likewise. Adjust whitespace.
4024
4025         * include/bits/basic_string.h: Fix iterator/index confusion in
4026         Doxygen comments.
4027         * include/bits/range_access.h: Fix Doxygen warnings.
4028         * include/bits/refwrap.h: Do not document implementation details.
4029         (ref, cref): Group docs with reference_wrapper.
4030         * include/std/fstream: Fix Doxygen markup.
4031         * libsupc++/initializer_list (begin, end): Group docs with
4032         initializer_list.
4033
4034         * doc/doxygen/user.cfg.in: Set MARKDOWN_SUPPORT=YES.
4035
4036         * include/bits/unique_lock.h: Fix/improve doxygen markup.
4037         * include/std/mutex: Likewise.
4038         * include/std/shared_mutex: Likewise.
4039
4040         * include/bits/fs_dir.h: Fix/improve doxygen markup.
4041         * include/bits/fs_fwd.h: Likewise.
4042         * include/bits/fs_ops.h: Likewise.
4043         * include/bits/fs_path.h: Likewise.
4044         * include/std/filesystem: Likewise.
4045
4046         * include/experimental/bits/net.h: Fix/improve doxygen markup.
4047         * include/experimental/buffer: Likewise.
4048         * include/experimental/executor: Likewise.
4049         * include/experimental/internet: Likewise.
4050         * include/experimental/io_context: Likewise.
4051         * include/experimental/net: Likewise.
4052         * include/experimental/netfwd: Likewise.
4053         * include/experimental/socket: Likewise.
4054         * include/experimental/timer: Likewise.
4055
4056         * doc/doxygen/doxygroups.cc: Move description of experimental group
4057         here.
4058         * include/experimental/algorithm: Add to libfund-ts doc group.
4059         * include/experimental/any: Likewise. Do not document implementation
4060         details.
4061         * include/experimental/array: Add to libfund-ts doc group.
4062         * include/experimental/bits/lfts_config.h: Define libfund-ts doc group
4063         for Library Fundamentals.
4064         * include/experimental/chrono: Add to libfund-ts doc group.
4065         * include/experimental/deque: Likewise.
4066         * include/experimental/forward_list: Likewise.
4067         * include/experimental/functional: Likewise.
4068         * include/experimental/iterator: Likewise.
4069         * include/experimental/list: Likewise.
4070         * include/experimental/map: Likewise.
4071         * include/experimental/memory: Likewise.
4072         * include/experimental/memory_resource: Likewise. Improve docs.
4073         details.
4074         * include/experimental/numeric: Add to libfund-ts doc group.
4075         * include/experimental/optional: Likewise.
4076         * include/experimental/propagate_const: Likewise.
4077         * include/experimental/random: Likewise.
4078         * include/experimental/ratio: Likewise.
4079         * include/experimental/regex: Likewise.
4080         * include/experimental/set: Likewise.
4081         * include/experimental/source_location: Likewise.
4082         * include/experimental/string: Likewise.
4083         * include/experimental/string_view: Likewise.
4084         * include/experimental/system_error: Likewise.
4085         * include/experimental/tuple: Likewise.
4086         * include/experimental/type_traits: Likewise.
4087         * include/experimental/unordered_map: Likewise.
4088         * include/experimental/unordered_set: Likewise.
4089         * include/experimental/utility: Likewise.
4090         * include/experimental/vector: Likewise.
4091         * testsuite/experimental/any/misc/any_cast_neg.cc: Adjust dg-error.
4092         * testsuite/experimental/array/neg.cc: Adjust dg-error.
4093         * testsuite/experimental/propagate_const/assignment/move_neg.cc:
4094         Likewise.
4095         * testsuite/experimental/propagate_const/cons/move_neg.cc: Likewise.
4096         * testsuite/experimental/propagate_const/requirements2.cc: Likewise.
4097         * testsuite/experimental/propagate_const/requirements3.cc: Likewise.
4098         * testsuite/experimental/propagate_const/requirements4.cc: Likewise.
4099         * testsuite/experimental/propagate_const/requirements5.cc: Likewise.
4100
4101         * include/experimental/bits/fs_dir.h: Fix Doxygen markup.
4102         * include/experimental/bits/fs_fwd.h: Improve docs.
4103         * include/experimental/bits/fs_ops.h: fix Doxygen markup.
4104         * include/experimental/bits/fs_path.h: Likewise.
4105         (path, filesystem_error, u8path): Improve docs.
4106         * include/experimental/filesystem: Link to docs for TS.
4107
4108         * config/allocator/new_allocator_base.h (__allocator_base): Add
4109         workaround for Doxygen bug #6945.
4110         * include/std/memory: Improve docs. Define group for pointer safety.
4111         * include/std/scoped_allocator: Improve docs. Use "undocumented"
4112         conditional to suppress documentation for implementation details.
4113
4114         * include/bits/specfun.h: Improve docs.
4115         * include/tr1/cmath: Likewise. Fix nesting of preprocessor conditions
4116         and namespaces.
4117
4118         * doc/doxygen/doxygroups.cc (std::tr2, std::__gnu_cxx): Improve docs.
4119         (std::experimental): Add docs.
4120         * doc/doxygen/user.cfg.in (PREDEFINED): Expand macros for __cxx11
4121         namespace to nothing when generating docs.
4122         * include/bits/regex_constants.h (std::regex_constants): Improve docs.
4123         * include/std/chrono (std::chrono): Likewise.
4124         * include/std/functional (std::placeholders): Likewise.
4125         * include/std/thread (std::this_thread): Likewise.
4126
4127         * include/parallel/settings.h: Fix Doxygen markup.
4128
4129         * include/ext/pb_ds/detail/bin_search_tree_/*_imps.hpp: Do not define
4130         anything unless PB_DS_CLASS_C_DEC is defined.
4131         * include/ext/pb_ds/detail/binary_heap_/*_imps.hpp: Likewise.
4132         * include/ext/pb_ds/detail/binomial_heap_/*_imps.hpp: Likewise.
4133         * include/ext/pb_ds/detail/binomial_heap_base_/*_imps.hpp: Likewise.
4134         * include/ext/pb_ds/detail/cc_hash_table_map_/*_imps.hpp: Likewise.
4135         * include/ext/pb_ds/detail/gp_hash_table_map_/*_imps.hpp: Likewise.
4136         * include/ext/pb_ds/detail/hash_fn/*_imp.hpp: Likewise.
4137         * include/ext/pb_ds/detail/left_child_next_sibling_heap_/*_imps.hpp:
4138         Likewise.
4139         * include/ext/pb_ds/detail/list_update_map_/*_imps.hpp: Likewise.
4140         * include/ext/pb_ds/detail/ov_tree_map_/*_imps.hpp: Likewise.
4141         * include/ext/pb_ds/detail/pairing_heap_/*_imps.hpp: Likewise.
4142         * include/ext/pb_ds/detail/pat_trie_/*_imps.hpp: Likewise.
4143         * include/ext/pb_ds/detail/rb_tree_map_/*_imps.hpp: Likewise.
4144         * include/ext/pb_ds/detail/rc_binomial_heap_/*_imps.hpp: Likewise.
4145         * include/ext/pb_ds/detail/resize_policy*_imp.hpp: Likewise.
4146         * include/ext/pb_ds/detail/splay_tree_/*_imps.hpp: Likewise.
4147         * include/ext/pb_ds/detail/thin_heap_/*_imps.hpp: Likewise.
4148         * include/ext/pb_ds/detail/trie_policy*_imp.hpp: Likewise.
4149         * include/ext/pb_ds/detail/unordered_iterator/const_iterator.hpp:
4150         Likewise.
4151         * include/ext/pb_ds/detail/unordered_iterator/iterator.hpp: Likewise.
4152         * include/ext/pb_ds/detail/unordered_iterator/point_const_iterator.hpp:
4153         Likewise.
4154         * include/ext/pb_ds/detail/unordered_iterator/point_iterator.hpp:
4155         Likewise.
4156
4157         * doc/doxygen/user.cfg.in: Regenerate with Doxygen 1.8.14 and set
4158         GROUP_NESTED_COMPOUNDS=YES and SORT_BY_SCOPE_NAME=NO. Add various
4159         _GLIBCXX_xxx macros and __attribute__(X) to PREDEFINED macros that
4160         Doxygen expands.
4161
4162 2019-05-01  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
4163
4164         * config/abi/post/i386-solaris2.10/baseline_symbols.txt: Regenerate.
4165         * config/abi/post/i386-solaris2.10/amd64/baseline_symbols.txt: Likewise.
4166         * config/abi/post/i386-solaris2.11/baseline_symbols.txt: Likewise.
4167         * config/abi/post/i386-solaris2.11/amd64/baseline_symbols.txt: Likewise.
4168         * config/abi/post/sparc-solaris2.10/baseline_symbols.txt: Likewise.
4169         * config/abi/post/sparc-solaris2.10/sparcv9/baseline_symbols.txt:
4170         Likewise.
4171         * config/abi/post/sparc-solaris2.11/baseline_symbols.txt: Likewise.
4172         * config/abi/post/sparc-solaris2.11/sparcv9/baseline_symbols.txt:
4173         Likewise.
4174
4175 2019-05-01  Jonathan Wakely  <jwakely@redhat.com>
4176
4177         PR libstdc++/61761
4178         * include/std/complex (__complex_proj): Return parameter unchanged.
4179         [_GLIBCXX_USE_C99_COMPLEX] (__complex_proj): Change overloads for
4180         floating-point types to take std::complex arguments.
4181         [_GLIBCXX_USE_C99_MATH_TR1] (__complex_proj): Add overloads for
4182         floating-point types.
4183         * testsuite/26_numerics/complex/proj.cc: New test.
4184
4185 2019-04-30  Jakub Jelinek  <jakub@redhat.com>
4186
4187         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Change _Lock_policyE2 exports
4188         to _Lock_policyE[012].
4189         * config/abi/post/riscv64-linux-gnu/baseline_symbols.txt: Update.
4190
4191 2019-04-30  Jonathan Wakely  <jwakely@redhat.com>
4192
4193         * testsuite/27_io/filesystem/path/decompose/root_path.cc: Remove
4194         macros accidentally left in.
4195         * testsuite/27_io/filesystem/path/native/string-char8_t.cc: Remove
4196         unnecessary -lstdc++fs option. Fix test for mingw.
4197         * testsuite/experimental/filesystem/path/native/string-char8_t.cc:
4198         Fix test for mingw.
4199
4200 2019-04-30  Jakub Jelinek  <jakub@redhat.com>
4201
4202         * config/abi/post/riscv64-linux-gnu/baseline_symbols.txt: Update.
4203
4204 2019-04-29  Jonathan Wakely  <jwakely@redhat.com>
4205
4206         * include/bits/stl_algo.h (generate_n): Adjust doxygen comment.
4207
4208         * include/bits/move.h (swap(T&, T&), swap(T (&)[N], T (&)[N])): Use
4209         _GLIBCXX_NOEXCEPT_IF to simplify declarations.
4210
4211         PR libstdc++/71312
4212         * src/c++11/shared_ptr.cc (get_mutex): Align pool mutexes to 64 bytes.
4213
4214         * include/bits/stl_bvector.h (vector<bool>::empty()): Add nodiscard
4215         attribute.
4216
4217         * include/bits/stl_iterator_base_types.h (_Iter_base): Remove unused
4218         class template and partial specialization.
4219
4220         PR libstdc++/87982
4221         * include/bits/stl_algo.h (generate_n): Convert _Size parameter to
4222         an integral type.
4223         * include/bits/stl_algobase.h (__size_to_integer): New overloaded
4224         functions to convert a value to an integral type.
4225         (__fill_n_a, __fill_n_a): Assert that __n is already an integral type.
4226         (fill_n): Convert _Size parameter to an integral type.
4227         * testsuite/25_algorithms/fill_n/87982.cc: New test.
4228         * testsuite/25_algorithms/fill_n/87982_neg.cc: New test.
4229         * testsuite/25_algorithms/fill_n/dr426.cc: New test.
4230         * testsuite/25_algorithms/generate_n/87982.cc: New test.
4231         * testsuite/25_algorithms/generate_n/87982_neg.cc: New test.
4232         * testsuite/25_algorithms/generate_n/dr426.cc: New test.
4233
4234 2019-04-28  Nina Dinka Ranns  <dinka.ranns@gmail.com>
4235
4236         Adding noexcept-specification on tuple constructors (LWG 2899)
4237         * libstdc++-v3/include/std/tuple:
4238         (tuple()): Add noexcept-specification.
4239         (tuple(const _Elements&...)): Likewise
4240         (tuple(_UElements&&...)): Likewise
4241         (tuple(const tuple<_UElements...>&)): Likewise
4242         (tuple(tuple<_UElements...>&&)): Likewise
4243         (tuple(const _T1&, const _T2&)): Likewise
4244         (tuple(_U1&&, _U2&&)): Likewise
4245         (tuple(const tuple<_U1, _U2>&): Likewise
4246         (tuple(tuple<_U1, _U2>&&): Likewise
4247         (tuple(const pair<_U1, _U2>&): Likewise
4248         (tuple(pair<_U1, _U2>&&): Likewise
4249         * libstdc++-v3/testsuite/20_util/tuple/cons/noexcept_specs.cc: New
4250
4251 2019-04-27  Marc Glisse  <marc.glisse@inria.fr>
4252
4253         PR libstdc++/87106
4254         * include/bits/stl_uninitialized.h (__relocate_object_a): Mark the
4255         arguments with __restrict.
4256
4257 2019-04-26  H.J. Lu  <hongjiu.lu@intel.com>
4258
4259         * config/abi/post/x86_64-linux-gnu/x32/baseline_symbols.txt: Updated.
4260
4261 2019-04-26  Jonathan Wakely  <jwakely@redhat.com>
4262
4263         * include/experimental/bits/fs_path.h
4264         (path::_S_convert_loc<_InputIterator>): Create const std::string to
4265         avoid redundant call to _S_convert_loc with non-const pointers.
4266
4267         * testsuite/20_util/variant/run.cc: Use a new Hashable type to test
4268         hashing, because pmr::string depends on _GLIBCXX_USE_CXX11_ABI==1.
4269         * testsuite/21_strings/basic_string/hash/hash.cc
4270         [!_GLIBCXX_USE_CXX11_ABI]: Don't test pmr strings.
4271         * testsuite/21_strings/basic_string/hash/hash_char8_t.cc
4272         [!_GLIBCXX_USE_CXX11_ABI]: Likewise.
4273
4274         * config/abi/pre/gnu.ver (GLIBCXX_3.4): Replace wildcard that matches
4275         wstring::_M_replace_dispatch with more specific patterns.
4276         * include/bits/fs_path.h (path::_S_convert_loc<_InputIterator>):
4277         Create const std::string to avoid redundant call to _S_convert_loc
4278         with non-const pointers.
4279         * include/bits/locale_conv.h (__do_str_codecvt): Use if-constexpr to
4280         avoid unnecessary basic_string::assign instantiations.
4281
4282         * include/std/memory (__uses_alloc_args): Add string-literal to
4283         static_assert, to match the one in __uses_alloc.
4284         [__cpp_concepts] (_Std_pair): Use C++2a syntax for concept.
4285         * testsuite/20_util/polymorphic_allocator/construct_c++2a.cc: Check
4286         for recursive uses-allocator construction of nested pairs.
4287         * testsuite/20_util/scoped_allocator/construct_pair_c++2a.cc:: Add
4288         comment.
4289
4290 2019-04-26  Jakub Jelinek  <jakub@redhat.com>
4291
4292         * config/abi/post/s390x-linux-gnu/32/baseline_symbols.txt: Update.
4293         * config/abi/post/s390-linux-gnu/baseline_symbols.txt: Update.
4294         * config/abi/post/powerpc-linux-gnu/baseline_symbols.txt: Update.
4295         * config/abi/post/powerpc64-linux-gnu/32/baseline_symbols.txt: Update.
4296
4297         * config/abi/post/x86_64-linux-gnu/baseline_symbols.txt: Update.
4298         * config/abi/post/x86_64-linux-gnu/32/baseline_symbols.txt: Update.
4299         * config/abi/post/i386-linux-gnu/baseline_symbols.txt: Update.
4300         * config/abi/post/i486-linux-gnu/baseline_symbols.txt: Update.
4301         * config/abi/post/aarch64-linux-gnu/baseline_symbols.txt: Update.
4302         * config/abi/post/s390x-linux-gnu/baseline_symbols.txt: Update.
4303         * config/abi/post/powerpc64-linux-gnu/baseline_symbols.txt: Update.
4304
4305 2019-04-25  Jonathan Wakely  <jwakely@redhat.com>
4306
4307         PR libstdc++/90239
4308         * doc/xml/manual/status_cxx2020.xml: Amend P0591R4 status.
4309         * include/std/scoped_allocator [__cplusplus > 201703L]
4310         (scoped_allocator_adaptor::construct): Define in terms of
4311         uses_allocator_construction_args, as per P0591R4.
4312         * testsuite/20_util/scoped_allocator/construct_pair_c++2a.cc: New test.
4313         * testsuite/util/testsuite_allocator.h: Remove name of unused
4314         parameter.
4315
4316 2019-04-24  Jonathan Wakely  <jwakely@redhat.com>
4317
4318         * doc/xml/manual/status_cxx2017.xml: Document P0024R2 status.
4319         * doc/html/*: Regenerate.
4320
4321         * include/bits/fs_path.h (operator<, operator<=, operator>)
4322         (operator>=, operator==, operator!=): Make hidden friends, as per
4323         LWG 3065.
4324         * testsuite/27_io/filesystem/path/native/string-char8_t.cc: Fix
4325         string type in test.
4326         * testsuite/27_io/filesystem/path/native/string.cc: Likewise.
4327
4328         * include/std/any (any::any(ValueType&&)): Use __and_v.
4329         * include/std/numeric (midpoint(T, T, T), midpoint(T*, T*, T*)):
4330         Likewise.
4331
4332         * include/std/tuple (apply): Use remove_reference_t instead of decay_t
4333         as per P0777R1.
4334         * include/std/type_traits (__result_of_memfun): Use remove_reference
4335         instead of __remove_cvref_t and remove redundant is_same check.
4336         (__inv_unwrap): Use __remove_cvref_t instead of decay_t.
4337
4338         * include/experimental/string_view (basic_string_view::pointer)
4339         (basic_string_view::reference): Fix to refer to non-const value_type.
4340         * include/bits/basic_string.h (basic_string): Use __sv_check and
4341         __sv_limit instead of basic_string_view::_M_check and
4342         basic_string_view::_M_limit.
4343         * include/std/string_view (__sv_check, __sv_limit): New
4344         helper functions to replace basic_string_view::_M_check and
4345         basic_string_view::_M_limit.
4346         (basic_string_view): Add static assertions to enforce ill-formed
4347         requirement for traits_type::char_type from P1148R0, and to enforce
4348         required properties of char-like types.
4349         (basic_string_view::pointer, basic_string_view::reference): Fix to
4350         refer to non-const value_type.
4351         (basic_string_view::operator[], basic_string_view::at)
4352         (basic_string_view::front, basic_string_view::back)
4353         (basic_string_view::data): Use const_reference and const_pointer
4354         typedefs for return types.
4355         (basic_string_view::_M_check, basic_string_view::_M_limit): Remove.
4356         (hash<wstring_view>): Fix argument_type typedef.
4357         * testsuite/21_strings/basic_string_view/modifiers/remove_prefix/
4358         char/1.cc: Fix expected return type of basic_string_view::data().
4359         * testsuite/21_strings/basic_string_view/modifiers/remove_prefix/
4360         wchar_t/1.cc: Likewise.
4361         * testsuite/21_strings/basic_string_view/modifiers/remove_suffix/
4362         char/1.cc: Likewise.
4363         * testsuite/21_strings/basic_string_view/modifiers/remove_suffix/
4364         wchar_t/1.cc: Likewise.
4365         * testsuite/21_strings/basic_string_view/requirements/traits_neg.cc:
4366         New test.
4367         * testsuite/21_strings/basic_string_view/requirements/typedefs.cc:
4368         Check reference and pointer typedefs.
4369         * testsuite/experimental/string_view/requirements/typedefs.cc:
4370         Likewise.
4371         * testsuite/experimental/string_view/modifiers/remove_prefix/char/1.cc:
4372         Fix expected return type of basic_string_view::data().
4373         * testsuite/experimental/string_view/modifiers/remove_prefix/wchar_t/
4374         1.cc: Likewise.
4375         * testsuite/experimental/string_view/modifiers/remove_suffix/char/1.cc:
4376         Likewise.
4377         * testsuite/experimental/string_view/modifiers/remove_suffix/wchar_t/
4378         1.cc: Likewise.
4379
4380         PR libstdc++/90220
4381         * include/std/any (__any_caster): Use remove_cv_t instead of decay_t.
4382         Avoid a runtime check for types that can never be stored in std::any.
4383         * testsuite/20_util/any/misc/any_cast.cc: Test std::any_cast with
4384         array types.
4385
4386         PR libstdc++/90220 (partial)
4387         * include/std/any (any_cast<T>(any*), any_cast<T>(const any*)): Do
4388         not attempt ill-formed static_cast to pointers to non-object types.
4389         * testsuite/20_util/any/misc/any_cast.cc: Test std::any_cast with
4390         function types.
4391
4392         * testsuite/20_util/variant/run.cc: Catch exception by reference to
4393         prevent -Wcatch-value warning.
4394
4395         * include/std/variant (__variant_construct): Use template parameter
4396         type instead of equivalent decltype-specifier.
4397         (_Move_ctor_base<false, Types...>::_Move_ctor_base(_Move_ctor_base&&)):
4398         Replace forward with move.
4399         (_Move_ctor_base<false, Types...>::_M_destructive_move)
4400         (_Move_ctor_base<false, Types...>::_M_destructive_copy)
4401         (_Move_ctor_base<true, Types...>::_M_destructive_move)
4402         (_Move_ctor_base<true, Types...>::_M_destructive_copy): Only set the
4403         index after construction succeeds.
4404         (_Copy_assign_base<false, Types...>::operator=): Remove redundant
4405         if-constexpr checks that are always true. Use __remove_cvref_t instead
4406         of remove_reference so that is_nothrow_move_constructible check
4407         doesn't use a const rvalue parameter. In the potentially-throwing case
4408         construct a temporary and move assign it, as per LWG 2904.
4409         (_Move_assign_base<false, Types...>::operator=): Remove redundant
4410         if-constexpr checks that are always true. Use emplace as per LWG 2904.
4411         (variant::operator=(T&&)): Only use emplace conditionally, otherwise
4412         construct a temporary and move assign from it, as per LWG 2904.
4413         * testsuite/20_util/variant/exception_safety.cc: Check that
4414         assignment operators have strong exception safety guarantee.
4415
4416 2019-04-23  Thomas Rodgers <trodgers@redhat.com>
4417
4418         Document PSTL linker flags
4419
4420         * doc/xml/manual/using.xml: Add PSTL linker flags to table 3.1.
4421
4422 2019-04-23  Jonathan Wakely  <jwakely@redhat.com>
4423
4424         * include/std/variant (__detail::__variant::_Traits): Make
4425         _S_trivial_copy_assign depend on _S_trivial_copy_ctor and make
4426         _S_trivial_move_assign depend on _S_trivial_move_ctor, as per
4427         P0602R4.
4428         (__detail::__variant::_Copy_assign_alias): Only depend on
4429         _S_trivial_copy_assign, which subsumes _S_trivial_copy_ctor now.
4430         * testsuite/20_util/variant/compile.cc: Correct checks for trivial
4431         move assignment operators.
4432
4433         PR libstdc++/90165
4434         * include/std/variant (variant::__not_self): New helper for the
4435         is_same_v<remove_cvref_t<T>, variant>==false constraints.
4436         (variant::__to_type_impl): Remove.
4437         (variant::__to_type): Add default argument to check pack size, instead
4438         of using __to_type_impl.
4439         (variant::__accepted_type): Add default argument using __not_self.
4440         (variant::__is_in_place_tag, variant::__not_in_place_tag): New helpers
4441         for variant(T&&) constructor constraint.
4442         (variant::variant(T&&)): Use __not_in_place_tag in constraints.
4443         Extract __accepted_type into a named template parameter for reuse in
4444         other constraints and in the exception specification.
4445         (variant::variant(in_place_type_t<T>, Args&&...))
4446         (variant::variant(in_place_type_t<T>, initializer_list<U>, Args&&...))
4447         (variant::variant(in_place_index_t<T>, Args&&...))
4448         (variant::variant(in_place_index_t<T>, initializer_list<U>, Args&&...))
4449         (variant::operator=T&&)): Remove redundant && from trait arguments.
4450         * testsuite/20_util/variant/compile.cc: Check variant(T&&) constructor
4451         isn't used for in_place_type or in_place_index arguments.
4452
4453         * include/std/type_traits (unwrap_reference_t): Define for C++2a.
4454         (unwrap_ref_decay): Remove inheritance from unwrap_reference.
4455         * testsuite/20_util/unwrap_reference/1.cc: Adjust test to use alias.
4456
4457 2019-04-23  Ramana Radhakrishnan  <ramana.radhakrishnan@arm.com>
4458             Bernd Edlinger  <bernd.edlinger@hotmail.de>
4459             Jakub Jelinek  <jakub@redhat.com>
4460
4461         PR target/89093
4462         * libsupc++/eh_personality.cc (PERSONALITY_FUNCTION): Add
4463         general-regs-only target attribute for ARM.
4464
4465 2019-04-23  Jonathan Wakely  <jwakely@redhat.com>
4466
4467         PR libstdc++/87431
4468         * include/bits/basic_string.h (_Never_valueless_alt): Make partial
4469         specialization also depend on is_nothrow_move_constructible.
4470         * include/std/variant (__detail::__variant::__never_valueless()):
4471         Only true if the variant would have a move assignment operator.
4472         (__detail::__variant::_Variant_storage<false, T...>::_M_valid()):
4473         Check __never_valueless<T...>().
4474         (variant::emplace): Only perform non-throwing move assignments
4475         for never-valueless alternatives if the variant has a move assignment
4476         operator.
4477         * testsuite/20_util/variant/compile.cc: Check that never-valueless
4478         types can be emplaced into non-assignable variants.
4479         * testsuite/20_util/variant/run.cc: Check that never-valueless types
4480         don't get copied when emplaced into non-assignable variants.
4481
4482         * include/std/variant (__detail::__variant::__ref_cast): Remove
4483         unused function.
4484         (__detail::__variant::_Uninitialized::_M_get)
4485         (__detail::__variant::__get)
4486         (__gen_vtable_impl::__element_by_index_or_cookie): Add noexcept.
4487
4488 2019-04-21  Iain Sandoe  <iain@sandoe.co.uk>
4489
4490         * testsuite/17_intro/headers/c++1998/charset.cc: Skip for Darwin8
4491         to Darwin10.
4492         * testsuite/17_intro/headers/c++2011/charset.cc: Likewise.
4493         * testsuite/17_intro/headers/c++2014/charset.cc: Likewise.
4494         * testsuite/17_intro/headers/c++2017/charset.cc: Likewise.
4495         * testsuite/17_intro/headers/c++2020/charset.cc: Likewise.
4496
4497 2019-04-20  Thomas Rodgers <trodgers@redhat.com>
4498
4499         Delegate PSTL configuration to pstl/pstl_config.h
4500
4501         * include/bits/c++config: Remove explicit PSTL configuration
4502         macros and use definitions from <pstl/pstl_config.h>.
4503
4504 2019-04-20  Thomas Rodgers <trodgers@redhat.com>
4505
4506         Cleanup algorithm implementations
4507         * include/pstl/glue_algorithm_impl.h (stable_sort): Forward
4508         execution policy.
4509         (mismatch): Forward execution policy.
4510         (equal): Qualify call to std::equal().
4511         (partial_sort): Forward execution policy.
4512         (inplace_merge): Forward execution policy.
4513
4514 2019-04-19  Thomas Rodgers <trodgers@redhat.com>
4515
4516         Improve implementation of parallel equal()
4517         * include/pstl/algorithm_impl.h
4518         (__internal::__brick_equal): use "4 iterator" version of
4519         std::equal().
4520         (__internal::__brick_equal): use simd for random access
4521         iterators on unsequenced execution policies.
4522         (__internal::__pattern_equal): add "4 iterator" version
4523         (__internal::__pattern_equal): dispatch to simd __brick_equal
4524         for vector-only execution policies.
4525         (__internal::__pattern_equal): dispatch to __parallel_or for
4526         parallel execution policies.
4527         * include/pstl/glue_algorithm_impl.h
4528         (std::equal): dispatch to "4 iterator" version of
4529         __internal::__pattern_equal().
4530
4531 2019-04-17  Jonathan Wakely  <jwakely@redhat.com>
4532
4533         PR libstdc++/90105
4534         * include/bits/forward_list.h (operator==): Do not use operator!= to
4535         compare elements.
4536         (forward_list<T, A>::sort(Comp)): When elements are equal take the one
4537         earlier in the list, so that sort is stable.
4538         * testsuite/23_containers/forward_list/operations/90105.cc: New test.
4539         * testsuite/23_containers/forward_list/comparable.cc: Test with
4540         types that meet the minimum EqualityComparable and LessThanComparable
4541         requirements. Remove irrelevant comment.
4542
4543         * include/std/variant (__detail::__variant::_Traits::_S_copy_assign):
4544         Do not depend on whether all alternative types are move constructible.
4545         (__detail::__variant::_Copy_assign_base::operator=): Remove cv-quals
4546         from the operand when deciding whether to perform the assignment.
4547         * testsuite/20_util/variant/compile.cc (DeletedMoves): Define type
4548         with deleted move constructor and deleted move assignment operator.
4549         (default_ctor, copy_ctor, move_ctor, copy_assign, move_assign): Check
4550         behaviour of variants with DeletedMoves as an alternative.
4551         * testsuite/20_util/variant/run.cc (DeletedMoves): Define same type.
4552         (move_ctor, move_assign): Check that moving a variant with a
4553         DeletedMoves alternative falls back to copying instead of moving.
4554
4555         * testsuite/20_util/variant/compile.cc: Remove empty string literals
4556         from static_assert declarations.
4557
4558         * testsuite/20_util/variant/compile.cc (MoveCtorOnly): Fix type to
4559         actually match its name.
4560         (MoveCtorAndSwapOnly): Define new type that adds swap to MoveCtorOnly.
4561         (test_swap()): Fix result for MoveCtorOnly and check
4562         MoveCtorAndSwapOnly.
4563
4564         * include/std/optional (optional::value_or(U&&) &&): Add missing
4565         constexpr specifier.
4566         * testsuite/20_util/optional/constexpr/observers/4.cc: Check value_or
4567         for disengaged optionals and rvalue optionals.
4568         * testsuite/20_util/optional/observers/4.cc: Likewise.
4569
4570 2019-04-12  Thomas Rodgers  <trodgers@redhat.com>
4571
4572         * include/pstl/algorithm_impl.h: Uglify identfiers.
4573         * include/pstl/numeric_impl.h:  Uglify identfiers.
4574         * include/pstl/parallel_backend_tbb.h: Uglify identfiers.
4575
4576 2019-04-11  Thomas Rodgers  <trodgers@redhat.com>
4577
4578         * include/bits/c++config:
4579         Add definition for __PSTL_ASSERT.
4580         Add definition for __PSTL_ASSERT_MSG.
4581         * include/pstl/algorithm_impl.h: Replace use of assert().
4582         * include/pstl/numeric_impl.h: Replace use of assert().
4583         * include/pstl/parallel_backend_tbb.h:
4584         Replace use of assert().
4585         Replace use of __TBB_ASSERT().
4586         * include/pstl/parallel_backend_utils.h: Replace use of assert().
4587
4588 2019-04-11  Jonathan Wakely  <jwakely@redhat.com>
4589
4590         PR libstdc++/90046
4591         * src/c++17/memory_resource.cc
4592         (monotonic_buffer_resource::_Chunk::allocate): Increase alignment if
4593         needed to allow placing a _Chunk at the end of the buffer.
4594         (monotonic_buffer_resource::_M_new_buffer): Remove static_assert.
4595
4596 2019-04-10  Jonathan Wakely  <jwakely@redhat.com>
4597
4598         * doc/xml/faq.xml: Add information about emergency EH pool.
4599         * doc/xml/manual/debug.xml: Update list of memory debugging tools.
4600         Move outdated information on mt_allocator to a separate section.
4601         * doc/xml/manual/evolution.xml: Clarify that GLIBCXX_FORCE_NEW
4602         doesn't affect the default allocator.
4603
4604         * testsuite/lib/libstdc++.exp (check_v3_target_parallel_mode): Fix
4605         typo.
4606
4607         PR libstdc++/89851
4608         * testsuite/20_util/variant/89851.cc: New test.
4609
4610 2019-04-09  Jonathan Wakely  <jwakely@redhat.com>
4611
4612         * include/std/variant: Adjust whitespace. Add comments.
4613         (_Multi_array): Leave primary template undefined.
4614         (_Multi_array<_Tp>): Define partial specialization for base case of
4615         recursion.
4616         (__gen_vtable_impl, __gen_vtable): Remove redundant && from type
4617         which is always a reference.
4618         (__gen_vtable::_S_apply()): Remove function, inline body into
4619         default member initializer.
4620         * testsuite/20_util/variant/visit.cc: Test with noncopyable types.
4621
4622         * include/std/variant (__variant_idx_cookie): Add member type.
4623         (__visitor_result_type): Remove.
4624         (__do_visit): Use invoke_result instead of __visitor_result_type.
4625         * testsuite/20_util/variant/visit.cc: New test.
4626
4627         PR libstdc++/90008
4628         * include/std/variant (_VARIANT_RELATION_FUNCTION_TEMPLATE): Remove
4629         unused capture.
4630         * testsuite/20_util/variant/90008.cc: New test.
4631
4632 2019-04-09  Thomas Rodgers  <trodgers@redhat.com>
4633
4634         * include/pstl/algorithm_impl.h: Add namespace qualification.
4635         * include/pstl/execution_defs.h: Add namespace qualification.
4636         * include/pstl/execution_impl.h: Add namespace qualification.
4637         * include/pstl/numeric_impl.h: Add namespace qualification.
4638         * include/pstl/parallel_backend_tbb.h: Add namespace qualification.
4639         * include/pstl/unseq_backend_simd.h: Add namespace qualification.
4640         * include/pstl/parallel_backend_utils.h: Include <cassert>.
4641
4642 2019-04-08  Ville Voutilainen  <ville.voutilainen@gmail.com>
4643
4644         Fix visit<R> for variant.
4645         * include/std/variant (__do_visit): Add a template parameter
4646         for enforcing same return types for visit.
4647         (__gen_vtable_impl): Likewise.
4648         (_S_apply_single_alt): Adjust.
4649         (__visit_invoke_impl): New. Handle casting to void.
4650         (__do_visit_invoke): New. Enforces same return types.
4651         (__do_visit_invoke_r): New. Converts return types.
4652         (__visit_invoke): Adjust.
4653         (__gen_vtable):  Add a template parameter for enforcing
4654         same return types for visit.
4655         * testsuite/20_util/variant/visit_r.cc: Add a test for a visitor with
4656         different return types.
4657         * testsuite/20_util/variant/visit_neg.cc: New. Ensures that
4658         visitors with different return types don't accidentally
4659         compile with regular visitation.
4660
4661 2019-04-08  Christophe Lyon  <christophe.lyon@linaro.org>
4662
4663         * testsuite/27_io/filesystem/iterators/caching.cc: Add
4664         dg-require-filesystem-ts.
4665
4666 2019-04-05  Jonathan Wakely  <jwakely@redhat.com>
4667
4668         * doc/xml/manual/status_cxx2020.xml: Update status.
4669         * include/std/variant (visit<R>): Define for C++2a (P0655R1).
4670         * testsuite/20_util/variant/visit_r.cc: New test.
4671
4672         * include/bits/fs_dir.h (directory_iterator::operator*)
4673         (directory_iterator::operator->): Add noexcept.
4674         (operator==, operator!=): Replace namespace-scope equality operators
4675         for directory iterators with hidden friends.
4676
4677         PR libstdc++/89986
4678         * config/abi/pre/gnu.ver: Add missing exports.
4679         * testsuite/27_io/filesystem/iterators/directory_iterator.cc: Test
4680         increment member.
4681
4682         * config/abi/pre/gnu.ver: Export new symbols.
4683         * include/bits/fs_dir.h (recursive_directory_iterator::options())
4684         (recursive_directory_iterator::recursion_pending())
4685         (recursive_directory_iterator::disable_recursion_pending()): Remove
4686         inline definitions. Make noexcept.
4687         (recursive_directory_iterator::depth())
4688         (recursive_directory_iterator::operator*())
4689         (recursive_directory_iterator::operator->()): Make noexcept.
4690         (recursive_directory_iterator::_M_options)
4691         (recursive_directory_iterator::_M_pending): Remove data members.
4692         * src/c++17/fs_path.cc (_Dir_stack): Add constructor and data members.
4693         (recursive_directory_iterator::recursive_directory_iterator): Remove
4694         ctor-initializer. Use new constructor for _Dir_stack.
4695         (recursive_directory_iterator::options())
4696         (recursive_directory_iterator::recursion_pending())
4697         (recursive_directory_iterator::disable_recursion_pending()): Add
4698         non-inline definitions.
4699         (recursive_directory_iterator::depth()): Make noexcept.
4700         (recursive_directory_iterator::increment(error_code&))
4701         (recursive_directory_iterator::pop(error_code&)): Adjust to new
4702         location of options and recursion_pending members.
4703         * testsuite/27_io/filesystem/iterators/recursion_pending.cc: New test.
4704         * testsuite/util/testsuite_fs.h (__gnu_test::scoped_file): Add
4705         user-declared move constructor and assignment operator, to make the
4706         type move-only.
4707
4708         * src/c++17/fs_dir.cc (_Dir::advance(bool, error_code&)): Handle
4709         d_type == DT_UNKNOWN immediately.
4710         (_Dir::should_recurse(bool, error_code&)): Remove file_type::unknown
4711         handling here.
4712         * testsuite/27_io/filesystem/iterators/caching.cc: New test.
4713
4714         * include/bits/fs_path.h (path::operator=(path&&)): Check for self
4715         assignment.
4716         * src/c++17/fs_path.cc (path::operator=(const path&)): Likewise.
4717         * testsuite/27_io/filesystem/path/assign/copy.cc: Test self
4718         assignment.
4719
4720         PR libstdc++/87431 (again)
4721         * include/bits/basic_string.h (__variant::_Never_valueless_alt):
4722         Define partial specialization for basic_string.
4723         * include/bits/shared_ptr.h (_Never_valueless_alt): Likewise for
4724         shared_ptr and weak_ptr.
4725         * include/bits/std_function.h (_Never_valueless_alt): Likewise for
4726         function.
4727         * include/bits/stl_vector.h (_Never_valueless_alt): Likewise for
4728         vector.
4729         * include/bits/unique_ptr.h (_Never_valueless_alt): Likewise for
4730         unique_ptr.
4731         * include/debug/vector (_Never_valueless_alt): Likewise for debug
4732         vector.
4733         * include/std/any (_Never_valueless_alt): Define explicit
4734         specialization for any.
4735         * include/std/variant (_Never_valueless_alt): Define primary template.
4736         (__never_valueless): Use _Never_valueless_alt instead of
4737         is_trivially_copyable.
4738         (variant::emplace<N>(Args&&...)): Add special case for non-throwing
4739         initializations to avoid try-catch overhead. Add special case for
4740         scalars produced by potentially-throwing conversions. Use
4741         _Never_valueless_alt instead of is_trivially_copyable for the
4742         remaining strong exception-safety cases.
4743         (variant::emplace<N>(initializer_list<U>, Args&&...)): Likewise.
4744         * testsuite/20_util/variant/87431.cc: Run both test functions.
4745         * testsuite/20_util/variant/exception_safety.cc: New test.
4746         * testsuite/20_util/variant/run.cc: Use pmr::string instead of string,
4747         so the variant becomes valueless.
4748
4749 2019-04-03  Jonathan Wakely  <jwakely@redhat.com>
4750
4751         PR libstdc++/85184
4752         * include/std/variant (_Copy_assign_base, _Move_assign_base, variant):
4753         Remove assertions.
4754         (variant::emplace<_Tp>): Return result of emplace<N> directly.
4755
4756         * include/std/string (__hash_string_base): New class template defining
4757         operator() for hashing strings.
4758         (hash<pmr::string>, hash<pmr::u8string>, hash<pmr::u16string>)
4759         (hash<pmr::u32string>, hash<pmr::wstring>): Define for C++17.
4760         * testsuite/21_strings/basic_string/hash/hash.cc: New test.
4761         * testsuite/21_strings/basic_string/hash/hash_char8_t.cc: New test.
4762
4763 2019-04-01  Ville Voutilainen  <ville.voutilainen@gmail.com>
4764
4765         Use single-visitation in variant assignment and swap and relops.
4766         Also use indices instead of types when checking whether
4767         variants hold the same thing.
4768         * include/std/variant (__do_visit): Add a template parameter
4769         for index visitation, invoke with indices if index visitation
4770         is used.
4771         (__variant_idx_cookie): New.
4772         (__visit_with_index): Likewise.
4773         (_Copy_assign_base::operator=): Do single-visitation with
4774         an index visitor.
4775         (_Move_assign_base::operator=): Likewise.
4776         (_Extra_visit_slot_needed): Adjust.
4777         (__visit_invoke): Call with indices if it's an index visitor.
4778         (relops): Do single-visitation with an index visitor.
4779         (swap): Likewise.
4780         (__visitor_result_type): New.
4781
4782 2019-03-30  Eric Botcazou  <ebotcazou@adacore.com>
4783
4784         * src/c++17/fs_ops.cc (fs::permissions): Use std::errc::not_supported.
4785
4786 2019-03-28  Ville Voutilainen  <ville.voutilainen@gmail.com>
4787
4788         Don't revisit a variant we are already visiting.
4789         * include/std/variant (__variant_construct_single): New.
4790         (__variant_construct): Use it.
4791         (_M_destructive_move): Likewise.
4792         (_M_destructive_copy): Likewise.
4793         (_Copy_assign_base::operator=): Adjust.
4794         (_Move_assign_base::operator=): Likewise.
4795         (swap): Likewise.
4796
4797 2019-03-26  Jonathan Wakely  <jwakely@redhat.com>
4798
4799         PR libstdc++/85965
4800         * include/bits/hashtable.h (_Hashtable): Move static assertions to
4801         destructor so they are not evaluated until the _Key type is complete.
4802         * include/bits/stl_tree.h (_Rb_tree): Likewise.
4803         * testsuite/23_containers/set/85965.cc: New test.
4804         * testsuite/23_containers/unordered_set/85965.cc: New test.
4805         * testsuite/23_containers/map/48101_neg.cc: Replace "here" errors
4806         with regexp matching the corresponding _Rb_tree specialization.
4807         * testsuite/23_containers/multimap/48101_neg.cc: Likewise.
4808         * testsuite/23_containers/multiset/48101_neg.cc: Remove "here" error.
4809         * testsuite/23_containers/set/48101_neg.cc: Likewise.
4810         * testsuite/23_containers/unordered_map/48101_neg.cc: Likewise.
4811         * testsuite/23_containers/unordered_multimap/48101_neg.cc: Likewise.
4812         * testsuite/23_containers/unordered_multiset/48101_neg.cc: Likewise.
4813         * testsuite/23_containers/unordered_set/48101_neg.cc: Likewise.
4814
4815 2019-03-26  Ville Voutilainen  <ville.voutilainen@gmail.com>
4816
4817         PR libstdc++/89825
4818         Fix based on a suggestion by Antony Polukhin.
4819         * include/std/variant (__never_valueless): New.
4820         (_M_valid): Use it.
4821         (_Extra_visit_slot_needed): New.
4822         (_Multi_array): Use it.
4823         (_S_apply_all_alts): Likewise.
4824
4825 2019-03-26  Ville Voutilainen  <ville.voutilainen@gmail.com>
4826
4827         PR libstdc++/89824
4828         Fix based on a suggestion by Antony Polukhin.
4829         * include/std/variant (__gen_vtable): Don't reserve an
4830         additional table slot, _Multi_array already does that.
4831
4832 2019-03-26  Ville Voutilainen  <ville.voutilainen@gmail.com>
4833
4834         PR libstdc++/89816
4835         Fix based on a suggestion by Antony Polukhin.
4836         * include/std/variant (__variant_construct): Capture a pointer
4837         to the storage and visit just one variant.
4838
4839 2019-03-22  Jonathan Wakely  <jwakely@redhat.com>
4840
4841         * doc/xml/manual/backwards_compatibility.xml: Remove link to
4842         Doxygen-generated pages with unstable URL.
4843         * doc/xml/manual/concurrency_extensions.xml: Likewise.
4844         * doc/xml/manual/extensions.xml: Likewise.
4845         * doc/xml/manual/parallel_mode.xml: Likewise.
4846         * doc/xml/manual/support.xml: Likewise.
4847
4848         * include/bits/stl_algobase.h (__lg): Do arithmetic on type int to
4849         avoid -Wconversion warnings.
4850
4851 2019-03-21  Thomas Rodgers  <trodgers@redhat.com>
4852
4853         * include/Makefile.am (std_header): Add ${std_srcdir}/execution.
4854         (pstl_srcdir, pstl_builddir, pstl_headers): New variables.
4855         (allstamped): Add stamp-pstl.
4856         (install-headers): Add ptsl_builddir.
4857         * include/Makefile.in: Regenerate.
4858         * include/bits/c++config: Add pstl configuration.
4859         * include/pstl/LICENSE.txt: New file.
4860         * include/pstl/algorithm_fwd.h: New file.
4861         * include/pstl/algorithm_impl.h: New file.
4862         * include/pstl/execution_defs.h: New file.
4863         * include/pstl/execution_impl.h: New file.
4864         * include/pstl/glue_algorithm_defs.h: New file.
4865         * include/pstl/glue_algorithm_impl.h: New file.
4866         * include/pstl/glue_execution_defs.h: New file.
4867         * include/pstl/glue_memory_defs.h: New file.
4868         * include/pstl/glue_memory_impl.h: New file.
4869         * include/pstl/glue_numeric_defs.h: New file.
4870         * include/pstl/glue_numeric_impl.h: New file.
4871         * include/pstl/memory_impl.h: New file.
4872         * include/pstl/numeric_fwd.h: New file.
4873         * include/pstl/numeric_impl.h: New file.
4874         * include/pstl/parallel_backend.h: New file.
4875         * include/pstl/parallel_backend_tbb.h: New file.
4876         * include/pstl/parallel_backend_utils.h: New file.
4877         * include/pstl/parallel_impl.h: New file.
4878         * include/pstl/pstl_config.h: New file.
4879         * include/pstl/unseq_backend_simd.h: New file.
4880         * include/pstl/utils.h: New file.
4881         * include/std/algorithm: Include parallel algorithm implementations.
4882         * include/std/execution: New file.
4883         * include/std/memory: Include parallel algorithm implementations.
4884         * include/std/numeric: Include parallel algorithm implementations.
4885         * include/std/version: Add parallel algorithms feature test macro.
4886         * testsuite/util/pstl/pstl_test_config.h: New file.
4887         * testsuite/util/pstl/test_utils.h: New file.
4888         * testsuite/20_util/specialized_algorithms/pstl/uninitialized_construct.cc: New file.
4889         * testsuite/20_util/specialized_algorithms/pstl/uninitialized_copy_move.cc: New file.
4890         * testsuite/20_util/specialized_algorithms/pstl/uninitialized_fill_destroy.cc: New file.
4891         * testsuite/25_algorithms/pstl/alg_merge/inplace_merge.cc: New file.
4892         * testsuite/25_algorithms/pstl/alg_merge/merge.cc: New file.
4893         * testsuite/25_algorithms/pstl/alg_modifying_operations/copy_if.cc: New file.
4894         * testsuite/25_algorithms/pstl/alg_modifying_operations/copy_move.cc: New file.
4895         * testsuite/25_algorithms/pstl/alg_modifying_operations/fill.cc: New file.
4896         * testsuite/25_algorithms/pstl/alg_modifying_operations/generate.cc: New file.
4897         * testsuite/25_algorithms/pstl/alg_modifying_operations/is_partitioned.cc: New file.
4898         * testsuite/25_algorithms/pstl/alg_modifying_operations/partition.cc: New file.
4899         * testsuite/25_algorithms/pstl/alg_modifying_operations/partition_copy.cc: New file.
4900         * testsuite/25_algorithms/pstl/alg_modifying_operations/remove.cc: New file.
4901         * testsuite/25_algorithms/pstl/alg_modifying_operations/remove_copy.cc: New file.
4902         * testsuite/25_algorithms/pstl/alg_modifying_operations/replace.cc: New file.
4903         * testsuite/25_algorithms/pstl/alg_modifying_operations/replace_copy.cc: New file.
4904         * testsuite/25_algorithms/pstl/alg_modifying_operations/rotate.cc: New file.
4905         * testsuite/25_algorithms/pstl/alg_modifying_operations/rotate_copy.cc: New file.
4906         * testsuite/25_algorithms/pstl/alg_modifying_operations/swap_ranges.cc: New file.
4907         * testsuite/25_algorithms/pstl/alg_modifying_operations/transform_binary.cc: New file.
4908         * testsuite/25_algorithms/pstl/alg_modifying_operations/transform_unary.cc: New file.
4909         * testsuite/25_algorithms/pstl/alg_modifying_operations/unique.cc: New file.
4910         * testsuite/25_algorithms/pstl/alg_modifying_operations/unique_copy_equal.cc: New file.
4911         * testsuite/25_algorithms/pstl/alg_nonmodifying/adjacent_find.cc: New file.
4912         * testsuite/25_algorithms/pstl/alg_nonmodifying/all_of.cc: New file.
4913         * testsuite/25_algorithms/pstl/alg_nonmodifying/any_of.cc: New file.
4914         * testsuite/25_algorithms/pstl/alg_nonmodifying/count.cc: New file.
4915         * testsuite/25_algorithms/pstl/alg_nonmodifying/equal.cc: New file.
4916         * testsuite/25_algorithms/pstl/alg_nonmodifying/find.cc: New file.
4917         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_end.cc: New file.
4918         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_first_of.cc: New file.
4919         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_if.cc: New file.
4920         * testsuite/25_algorithms/pstl/alg_nonmodifying/for_each.cc: New file.
4921         * testsuite/25_algorithms/pstl/alg_nonmodifying/mismatch.cc: New file.
4922         * testsuite/25_algorithms/pstl/alg_nonmodifying/none_of.cc: New file.
4923         * testsuite/25_algorithms/pstl/alg_nonmodifying/nth_element.cc: New file.
4924         * testsuite/25_algorithms/pstl/alg_nonmodifying/reverse.cc: New file.
4925         * testsuite/25_algorithms/pstl/alg_nonmodifying/reverse_copy.cc: New file.
4926         * testsuite/25_algorithms/pstl/alg_nonmodifying/search_n.cc: New file.
4927         * testsuite/25_algorithms/pstl/alg_sorting/includes.cc: New file.
4928         * testsuite/25_algorithms/pstl/alg_sorting/is_heap.cc: New file.
4929         * testsuite/25_algorithms/pstl/alg_sorting/is_sorted.cc: New file.
4930         * testsuite/25_algorithms/pstl/alg_sorting/lexicographical_compare.cc: New file.
4931         * testsuite/25_algorithms/pstl/alg_sorting/minmax_element.cc: New file.
4932         * testsuite/25_algorithms/pstl/alg_sorting/partial_sort.cc: New file.
4933         * testsuite/25_algorithms/pstl/alg_sorting/partial_sort_copy.cc: New file.
4934         * testsuite/25_algorithms/pstl/alg_sorting/set.cc: New file.
4935         * testsuite/25_algorithms/pstl/alg_sorting/sort.cc: New file.
4936         * testsuite/26_numerics/pstl/numeric_ops/adjacent_difference.cc: New file.
4937         * testsuite/26_numerics/pstl/numeric_ops/reduce.cc: New file.
4938         * testsuite/26_numerics/pstl/numeric_ops/scan.cc: New file.
4939         * testsuite/26_numerics/pstl/numeric_ops/transform_reduce.cc: New file.
4940         * testsuite/26_numerics/pstl/numeric_ops/transform_scan.cc: New file.
4941         * testsuite/testsuite/20_util/specialized_algorithms/pstl/uninitialized_construct.cc: New file.
4942         * testsuite/testsuite/20_util/specialized_algorithms/pstl/uninitialized_copy_move.cc: New file.
4943         * testsuite/testsuite/20_util/specialized_algorithms/pstl/uninitialized_fill_destroy.cc: New file.
4944         * testsuite/testsuite/25_algorithms/pstl/alg_merge/inplace_merge.cc: New file.
4945         * testsuite/testsuite/25_algorithms/pstl/alg_merge/merge.cc: New file.
4946         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/copy_if.cc: New file.
4947         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/copy_move.cc: New file.
4948         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/fill.cc: New file.
4949         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/generate.cc: New file.
4950         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/is_partitioned.cc: New file.
4951         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/partition.cc: New file.
4952         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/partition_copy.cc: New file.
4953         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/remove.cc: New file.
4954         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/remove_copy.cc: New file.
4955         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/replace.cc: New file.
4956         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/replace_copy.cc: New file.
4957         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/rotate.cc: New file.
4958         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/rotate_copy.cc: New file.
4959         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/swap_ranges.cc: New file.
4960         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/transform_binary.cc: New file.
4961         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/transform_unary.cc: New file.
4962         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/unique.cc: New file.
4963         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/unique_copy_equal.cc: New file.
4964         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/adjacent_find.cc: New file.
4965         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/all_of.cc: New file.
4966         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/any_of.cc: New file.
4967         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/count.cc: New file.
4968         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/equal.cc: New file.
4969         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/find.cc: New file.
4970         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/find_end.cc: New file.
4971         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/find_first_of.cc: New file.
4972         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/find_if.cc: New file.
4973         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/for_each.cc: New file.
4974         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/mismatch.cc: New file.
4975         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/none_of.cc: New file.
4976         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/nth_element.cc: New file.
4977         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/reverse.cc: New file.
4978         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/reverse_copy.cc: New file.
4979         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/search_n.cc: New file.
4980         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/includes.cc: New file.
4981         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/is_heap.cc: New file.
4982         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/is_sorted.cc: New file.
4983         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/lexicographical_compare.cc: New file.
4984         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/minmax_element.cc: New file.
4985         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/partial_sort.cc: New file.
4986         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/partial_sort_copy.cc: New file.
4987         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/set.cc: New file.
4988         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/sort.cc: New file.
4989         * testsuite/testsuite/26_numerics/pstl/numeric_ops/adjacent_difference.cc: New file.
4990         * testsuite/testsuite/26_numerics/pstl/numeric_ops/reduce.cc: New file.
4991         * testsuite/testsuite/26_numerics/pstl/numeric_ops/scan.cc: New file.
4992         * testsuite/testsuite/26_numerics/pstl/numeric_ops/transform_reduce.cc: New file.
4993         * testsuite/testsuite/26_numerics/pstl/numeric_ops/transform_scan.cc: New file.
4994
4995 2019-03-21  Jonathan Wakely  <jwakely@redhat.com>
4996
4997         * include/c_compatibility/math.h [!__STDCPP_WANT_MATH_SPEC_FUNCS__]
4998         (assoc_laguerre, assoc_laguerref, assoc_laguerrel, assoc_legendre)
4999         (assoc_legendref, assoc_legendrel, beta, betaf, betal, comp_ellint_1)
5000         (comp_ellint_1f, comp_ellint_1l, comp_ellint_2, comp_ellint_2f)
5001         (comp_ellint_2l, comp_ellint_3, comp_ellint_3f, comp_ellint_3l)
5002         (cyl_bessel_i, cyl_bessel_if, cyl_bessel_il, cyl_bessel_j)
5003         (cyl_bessel_jf, cyl_bessel_jl, cyl_bessel_k, cyl_bessel_kf)
5004         (cyl_bessel_kl, cyl_neumann, cyl_neumannf, cyl_neumannl, ellint_1)
5005         (ellint_1f, ellint_1l, ellint_2, ellint_2f, ellint_2l, ellint_3)
5006         (ellint_3f, ellint_3l, expint, expintf, expintl, hermite, hermitef)
5007         (hermitel, laguerre, laguerref, laguerrel, legendre, legendref)
5008         (legendrel, riemann_zeta, riemann_zetaf, riemann_zetal, sph_bessel)
5009         (sph_besself, sph_bessell, sph_legendre, sph_legendref, sph_legendrel)
5010         (sph_neumann, sph_neumannf, sph_neumannl): Only add using-declarations
5011         when the special functions IS is enabled, not for C++17.
5012         * testsuite/26_numerics/headers/cmath/functions_global_c++17.cc:
5013         Replace with ...
5014         * testsuite/26_numerics/headers/cmath/functions_global.cc: New test,
5015         without checks for special functions in C++17.
5016         * testsuite/26_numerics/headers/cmath/special_functions_global.cc:
5017         New test.
5018
5019         PR libstdc++/88066
5020         * include/backward/hash_map: Use <> for includes not "".
5021         * include/backward/hash_set: Likewise.
5022         * include/backward/strstream: Likewise.
5023         * include/tr1/bessel_function.tcc: Likewise.
5024         * include/tr1/exp_integral.tcc: Likewise.
5025         * include/tr1/legendre_function.tcc: Likewise.
5026         * include/tr1/modified_bessel_func.tcc: Likewise.
5027         * include/tr1/riemann_zeta.tcc: Likewise.
5028
5029 2019-03-19  Jonathan Wakely  <jwakely@redhat.com>
5030
5031         * doc/xml/manual/allocator.xml: Link to table documenting evolution
5032         of extension allocators.
5033         * doc/xml/manual/evolution.xml: Use angle brackets for header names.
5034         Document new headers in 7.2, 8.1 and 9.1 releases.
5035         * doc/xml/manual/using.xml: Adjust link target for new_allocator.
5036         * doc/html/*: Regenerate.
5037
5038 2019-03-12  John David Anglin  <dave.anglin@bell.net>
5039
5040         PR libstdc++/89461
5041         * testsuite/lib/libstdc++.exp: Locate libatomic.
5042         * testsuite/lib/dg-options.exp (add_options_for_libatomic): New.
5043         * testsuite/20_util/shared_ptr/thread/default_weaktoshared.cc: Add
5044         libatomic options.
5045         * testsuite/20_util/shared_ptr/thread/mutex_weaktoshared.cc: Likewise.
5046         * testsuite/experimental/net/timer/waitable/cons.cc: Likewise.
5047         * testsuite/experimental/net/timer/waitable/dest.cc: Likewise.
5048         * testsuite/experimental/net/timer/waitable/ops.cc: Likewise.
5049
5050 2019-03-11  Jonathan Wakely  <jwakely@redhat.com>
5051
5052         PR libstdc++/89460
5053         * configure.ac: Check for sockatmark.
5054         * crossconfig.m4: Check for sockatmark.
5055         * config.h.in: Regenerate.
5056         * configure: Regenerate.
5057         * include/experimental/internet (address_v4::_S_hton): Rename
5058         overloaded functions to _S_hton_16 and _S_ntoh_16.
5059         (address_v4::_S_ntoh): Rename to _S_ntoh_16 and _S_ntoh_32.
5060         (basic_endpoint): Adjust calls to _S_hton and _S_ntoh.
5061         * include/experimental/socket (basic_socket::at_mark): Check
5062         _GLIBCXX_HAVE_SOCKATMARK.
5063
5064         * testsuite/29_atomics/atomic_flag/test_and_set/explicit-hle.cc: Use
5065         const variables instead of macros.
5066
5067         PR libstdc++/89629
5068         * libsupc++/hash_bytes.cc [__SIZEOF_SIZE_T__ == 8] (_Hash_bytes):
5069         Use correct type for len_aligned.
5070         * testsuite/20_util/hash/89629.cc: New test.
5071
5072 2019-03-11  Jakub Jelinek  <jakub@redhat.com>
5073
5074         PR libstdc++/89641
5075         * include/std/atomic (atomic<T>::store, atomic<T>::load,
5076         atomic<T>::exchange, atomic<T>::compare_exchange_weak,
5077         atomic<T>::compare_exchange_strong): Cast __m or __s and __f to int.
5078         * include/bits/atomic_base.h (__atomic_base<T>::operator++,
5079         __atomic_base<T>::operator--, __atomic_base<T>::operator+=,
5080         __atomic_base<T>::operator-=, __atomic_base<T>::operator&=,
5081         __atomic_base<T>::operator|=, __atomic_base<T>::operator^=,
5082         __atomic_base<T*>::operator++, __atomic_base<T*>::operator--,
5083         __atomic_base<T*>::operator+=, __atomic_base<T*>::operator-=): Cast
5084         memory_order_seq_cst to int.
5085
5086 2019-03-08  Jonathan Wakely  <jwakely@redhat.com>
5087
5088         * doc/xml/manual/using.xml: Use link element instead of xref.
5089         * doc/html/*: Regenerate.
5090
5091         * include/bits/fs_path.h (path::format): Add fixed underlying type.
5092
5093 2019-03-08  François Dumont  <fdumont@gcc.gnu.org>
5094
5095         PR libstdc++/89477
5096         * include/debug/map.h (map): Use _RequireNotAllocator to constrain
5097         parameters in deduction guides.
5098         * include/debug/multimap.h (multimap): Likewise.
5099         * include/debug/set.h (multimap): Likewise.
5100         * include/debug/multiset.h (multimap): Likewise.
5101         * include/debug/unordered_map (unordered_map): Likewise.
5102         (unordered_multimap): Likewise.
5103         * include/debug/unordered_set (unordered_set): Likewise.
5104         (unordered_multiset): Likewise.
5105
5106         PR libstdc++/89608
5107         * include/debug/unordered_map (unordered_map<>::_M_check_rehashed):
5108         Invalidate all iterators in case of rehash.
5109         (unordered_multimap<>::_M_check_rehashed): Likewise.
5110         * include/debug/unordered_set
5111         (unordered_set<>::_M_check_rehashed): Likewise.
5112         (unordered_multiset<>::_M_check_rehashed): Likewise.
5113         * testsuite/23_containers/unordered_set/debug/89608_neg.cc: New.
5114
5115 2019-03-07  Andreas Schwab  <schwab@suse.de>
5116
5117         * config/abi/post/riscv64-linux-gnu: New directory.
5118         * config/abi/post/riscv64-linux-gnu/baseline_symbols.txt: New file.
5119
5120 2019-03-07  Jonathan Wakely  <jwakely@redhat.com>
5121
5122         * testsuite/20_util/function_objects/bind_front/1.cc: Change from
5123         compile test to run. Fix typo.
5124
5125         * doc/xml/manual/status_cxx2020.xml: Update C++20 status.
5126         * doc/html/*: Regenerate.
5127
5128         P0356R5 Simplified partial function application
5129         * include/std/functional [C++20] (_Bind_front, _Bind_front_t): Define
5130         helpers for bind_front.
5131         (bind_front, __cpp_lib_bind_front): Define.
5132         * testsuite/20_util/function_objects/bind_front/1.cc: New test.
5133
5134 2019-03-06  Jonathan Wakely  <jwakely@redhat.com>
5135
5136         * include/std/type_traits (__cpp_lib_bounded_array_traits): Define.
5137         * include/std/version (__cpp_lib_bounded_array_traits): Likewise.
5138         * testsuite/20_util/is_bounded_array/value.cc: Check for macro.
5139         * testsuite/20_util/is_unbounded_array/value.cc: Likewise.
5140
5141 2019-03-06  Edward Smith-Rowland  <3dw4rd@verizon.net>
5142
5143         PR libstdc++/86655 - std::assoc_legendre should not constrain
5144         the value of m (or x).
5145         * include/tr1/legendre_function.tcc (__assoc_legendre_p,
5146         __sph_legendre): If degree > order Don't throw, return 0.
5147         (__legendre_p, __assoc_legendre_p): Don't constrain x either.
5148         * testsuite/special_functions/02_assoc_legendre/pr86655.cc: New test.
5149         * testsuite/special_functions/20_sph_legendre/pr86655.cc: New test.
5150         * testsuite/tr1/5_numerical_facilities/special_functions/
5151         02_assoc_legendre/pr86655.cc: New test.
5152         * testsuite/tr1/5_numerical_facilities/special_functions/
5153         22_sph_legendre/pr86655.cc: New test.
5154
5155 2019-03-06  Ville Voutilainen  <ville.voutilainen@gmail.com>
5156
5157         Rewrite variant.
5158         Also PR libstdc++/85517
5159         * include/std/variant (__do_visit): New.
5160         (__variant_cast): Likewise.
5161         (__variant_cookie): Likewise.
5162         (__erased_*): Remove.
5163         (_Variant_storage::_S_vtable): Likewise.
5164         (_Variant_storage::__M_reset_impl): Adjust to use __do_visit.
5165         (_Variant_storage::__M_reset): Adjust.
5166         (__variant_construct): New.
5167         (_Copy_ctor_base(const _Copy_ctor_base&)): Adjust to use
5168         __variant_construct.
5169         (_Move_ctor_base(_Move_ctor_base&&)): Likewise.
5170         (_Move_ctor_base::__M_destructive_copy): New.
5171         (_Move_ctor_base::__M_destructive_move): Adjust to use
5172         __variant_construct.
5173         (_Copy_assign_base::operator=): Adjust to use __do_visit.
5174         (_Copy_assign_alias): Adjust to check both copy assignment
5175         and copy construction for triviality.
5176         (_Move_assign_base::operator=): Adjust to use __do_visit.
5177         (_Multi_array): Add support for visitors that accept and return
5178         a __variant_cookie.
5179         (__gen_vtable_impl::_S_apply_all_alts): Likewise.
5180         (__gen_vtable_impl::_S_apply_single_alt): Likewise.
5181         (__gen_vtable_impl::__element_by_index_or_cookie): New. Generate
5182         a __variant_cookie temporary for a variant that is valueless and..
5183         (__gen_vtable_impl::__visit_invoke): ..adjust here.
5184         (__gen_vtable::_Array_type): Conditionally make space for
5185         the __variant_cookie visitor case.
5186         (__variant_construct_by_index): New.
5187         (get_if): Adjust to use std::addressof.
5188         (relops): Adjust to use __do_visit.
5189         (variant): Add __variant_cast and __variant_construct_by_index
5190         as friends.
5191         (variant::emplace): Use _M_reset() and __variant_construct_by_index
5192         instead of self-destruction.
5193         (variant::swap): Adjust to use __do_visit.
5194         (visit): Reimplement in terms of __do_visit.
5195         (__variant_hash_call_base_impl::operator()): Adjust to use __do_visit.
5196         * testsuite/20_util/variant/compile.cc: Adjust.
5197         * testsuite/20_util/variant/run.cc: Likewise.
5198
5199 2019-03-06  Jonathan Wakely  <jwakely@redhat.com>
5200
5201         * include/bits/c++config.h (_cpp_lib_char8_t): Add L suffix to
5202         constant.
5203         * testsuite/experimental/feat-char8_t.cc: Likewise.
5204
5205          * include/std/type_traits [C++20] (is_bounded_array)
5206          (is_unbounded_array, is_bounded_array_v, is_unbounded_array_v):
5207          Define.
5208          * testsuite/20_util/is_bounded_array/requirements/
5209          explicit_instantiation.cc: New test.
5210          * testsuite/20_util/is_bounded_array/requirements/typedefs.cc: New
5211          test.
5212          * testsuite/20_util/is_bounded_array/value.cc: New test.
5213          * testsuite/20_util/is_unbounded_array/requirements/
5214          explicit_instantiation.cc: New test.
5215          * testsuite/20_util/is_unbounded_array/requirements/typedefs.cc: New
5216          * test.
5217          * testsuite/20_util/is_unbounded_array/value.cc: New test.
5218
5219         * include/bits/ptr_traits.h [C++20] (pointer_traits<T*>::pointer_to):
5220         Add constexpr.
5221         * testsuite/20_util/pointer_traits/pointer_to_constexpr.cc: New test.
5222
5223 2019-03-05  Jonathan Wakely  <jwakely@redhat.com>
5224
5225         * include/c_compatibility/math.h [C++20] (lerp): Add using
5226         declaration.
5227         * include/c_global/cmath [C++20] (__cpp_lib_interpolate): Define.
5228         (__lerp): Define function template to implement lerp.
5229         (lerp(float, float, float), lerp(double, double, double))
5230         (lerp(long double, long double, long double)): Define for C++20.
5231         * include/std/numeric [C++20] (__cpp_lib_interpolate): Define.
5232         (midpoint(T, T), midpoint(T*, T*)): Define.
5233         * include/std::version [C++20] (__cpp_lib_interpolate): Define.
5234         * testsuite/26_numerics/lerp.cc: New test.
5235         * testsuite/26_numerics/midpoint/floating.cc: New test.
5236         * testsuite/26_numerics/midpoint/integral.cc: New test.
5237         * testsuite/26_numerics/midpoint/pointer.cc: New test.
5238
5239 2019-03-04  Edward Smith-Rowland  <3dw4rd@verizon.net>
5240
5241         PR libstdc++/88996 Implement P0439R0
5242         Make std::memory_order a scoped enumeration.
5243         * include/bits/atomic_base.h: For C++20 make memory_order a scoped enum,
5244         add variables for the old enumerators.  Adjust calls.
5245         * testsuite/29_atomics/headers/atomic/types_std_c++2a.cc: New test.
5246         * testsuite/29_atomics/headers/atomic/types_std_c++2a_neg.cc: New test.
5247
5248 2019-03-04  Jonathan Wakely  <jwakely@redhat.com>
5249
5250         * testsuite/26_numerics/bit/bitops.rot/rotl.cc: Remove bogus dg-do
5251         directive.
5252
5253         * include/std/memory_resource (polymorphic_allocator): Add default
5254         template argument for C++20.
5255         (polymorphic_allocator::allocate_bytes)
5256         (polymorphic_allocator::deallocate_bytes)
5257         (polymorphic_allocator::allocate_object)
5258         (polymorphic_allocator::deallocate_object)
5259         (polymorphic_allocator::new_object)
5260         (polymorphic_allocator::delete_object): New member functions for
5261         C++20.
5262         * testsuite/20_util/polymorphic_allocator/allocate_object.cc: New
5263         test.
5264
5265 2019-03-03  Jonathan Wakely  <jwakely@redhat.com>
5266
5267         PR libstdc++/89562
5268         * src/filesystem/ops-common.h (do_copy_file): Open files in binary
5269         mode for mingw.
5270
5271 2019-03-01  Jonathan Wakely  <jwakely@redhat.com>
5272
5273         * testsuite/util/testsuite_allocator.h (__gnu_test::memory_resource)
5274         [!__cpp_sized_deallocation]: Do not pass size to operator delete.
5275
5276         * include/std/memory (uses_allocator_construction_args): New set of
5277         overloaded functions.
5278         (make_obj_using_allocator, uninitialized_construct_using_allocator):
5279         New functions.
5280         * include/std/memory_resource (polymorphic_allocator::construct)
5281         [__cplusplus > 201703l]: Replace all overloads with a single function
5282         using uses_allocator_construction_args.
5283         * testsuite/20_util/polymorphic_allocator/construct_c++2a.cc: New
5284         test.
5285         * testsuite/20_util/uses_allocator/make_obj.cc: New test.
5286
5287 2019-02-27  Jonathan Wakely  <jwakely@redhat.com>
5288
5289         PR libstdc++/89466
5290         * acinclude.m4 (GLIBCXX_CONFIGURE_DOCBOOK): Reorder check for local
5291         stylesheet directories before check for xsltproc. Try to use
5292         xmlcatalog to find local stylesheet directory before trying hardcoded
5293         paths. Add path used by suse to hardcoded paths. Adjust xsltproc
5294         check to look for the same stylesheet as doc/Makefile.am uses. Don't
5295         use xsltproc if xmlcatalog fails to find a local stylesheet.
5296         * configure.ac: Check for xmlcatalog.
5297         * Makefile.in: Regenerate.
5298         * configure: Likewise.
5299         * doc/Makefile.in: Likewise.
5300         * include/Makefile.in: Likewise.
5301         * libsupc++/Makefile.in: Likewise.
5302         * po/Makefile.in: Likewise.
5303         * python/Makefile.in: Likewise.
5304         * src/Makefile.in: Likewise.
5305         * src/c++11/Makefile.in: Likewise.
5306         * src/c++17/Makefile.in: Likewise.
5307         * src/c++98/Makefile.in: Likewise.
5308         * src/filesystem/Makefile.in: Likewise.
5309         * testsuite/Makefile.in: Likewise.
5310
5311 2019-02-26  Jonathan Wakely  <jwakely@redhat.com>
5312
5313         PR libstdc++/89477
5314         * include/bits/alloc_traits.h (_RequireNotAllocator): New helper for
5315         container deduction guides.
5316         * include/bits/hashtable.h (_RequireNotAllocatorOrIntegral): Likewise.
5317         * include/bits/stl_map.h (map): Use _RequireNotAllocator to constrain
5318         parameters in deduction guides.
5319         * include/bits/stl_multimap.h (multimap): Likewise.
5320         * include/bits/stl_multiset.h (multiset): Likewise.
5321         * include/bits/stl_queue.h (queue, priority_queue): Likewise.
5322         * include/bits/stl_set.h (set): Likewise.
5323         * include/bits/stl_stack.h (stack): Likewise.
5324         * include/bits/unordered_map.h (unordered_map, unordered_multimap):
5325         use _RequireNotAllocator and _RequireNotAllocatorOrIntegral to
5326         constrain parameters in deduction guides.
5327         * include/bits/unordered_set.h (unordered_set, unordered_multiset):
5328         Likewise.
5329         * testsuite/23_containers/map/cons/deduction.cc: Test additional
5330         deduction cases.
5331         * testsuite/23_containers/multiset/cons/deduction.cc: Likewise.
5332         * testsuite/23_containers/set/cons/deduction.cc: Likewise.
5333         * testsuite/23_containers/unordered_map/cons/deduction.cc: Likewise.
5334         * testsuite/23_containers/unordered_multimap/cons/deduction.cc:
5335         Likewise.
5336         * testsuite/23_containers/unordered_multiset/cons/deduction.cc:
5337         Likewise.
5338         * testsuite/23_containers/unordered_set/cons/deduction.cc: Likewise.
5339
5340         PR libstdc++/89416
5341         * include/bits/alloc_traits.h (__is_alloc_insertable_impl): Change
5342         to class template and partial specialization using void_t.
5343         (__is_copy_insertable, __is_move_insertable): Adjust base class.
5344
5345 2019-02-24  Jonathan Wakely  <jwakely@redhat.com>
5346
5347         PR libstdc++/89416
5348         * include/bits/alloc_traits.h (__is_alloc_insertable_impl): Make
5349         copy and move members public.
5350
5351 2019-02-23  Jonathan Wakely  <jwakely@redhat.com>
5352
5353         * include/std/type_traits (__underlying_type_impl): New helper to
5354         make underlying_type SFINAE-friendly.
5355         (underlying_type): Derive from __underlying_type_impl.
5356         * testsuite/20_util/underlying_type/requirements/typedefs-3.cc: New
5357         test.
5358
5359         PR libstdc++/89446
5360         * include/bits/char_traits.h (__constant_char_array): Check index is
5361         in range before dereferencing.
5362         (char_traits<char>::compare, char_traits<char>::find)
5363         (char_traits<char8_t>::compare, char_traits<char8_t>::find): Return
5364         immediately if n is zero.
5365         (char_traits<wchar_t>::compare, char_traits<wchar_t>::find): Likewise.
5366         Remove workarounds for PR 67026.
5367         * testsuite/21_strings/basic_string_view/operators/char/89446.cc:
5368         New test.
5369         * testsuite/21_strings/basic_string_view/operators/wchar_t/89446.cc:
5370         New test.
5371
5372 2019-02-22  Eric Botcazou  <ebotcazou@adacore.com>
5373
5374         * config/abi/post/sparc64-linux-gnu/baseline_symbols.txt: Adjust.
5375         * config/abi/post/sparc64-linux-gnu/32/baseline_symbols.txt: Likewise.
5376
5377 2019-02-22  Jakub Jelinek  <jakub@redhat.com>
5378
5379         PR libstdc++/89402
5380         * src/c++98/compatibility-ldbl.cc (_ZNKSt4hashIeEclEe): Change return
5381         type to std::size_t and argument to type to long double.
5382
5383 2019-02-22  Eric Botcazou  <ebotcazou@adacore.com>
5384
5385         * configure.host (abi_baseline_pair): Adjust for SPARC64/Linux.
5386         * config/abi/post/sparc64-linux-gnu: New directory.
5387         * config/abi/post/sparc64-linux-gnu/baseline_symbols.txt: New file.
5388         * config/abi/post/sparc64-linux-gnu/32: New directory.
5389         * config/abi/post/sparc64-linux-gnu/32/baseline_symbols.txt: New file.
5390
5391 2019-02-21  Jonathan Wakely  <jwakely@redhat.com>
5392
5393         * testsuite/29_atomics/headers/atomic/types_std_c++20.cc: New test.
5394         * testsuite/29_atomics/headers/atomic/types_std_c++20_neg.cc: New
5395         test.
5396
5397 2019-02-22  Tom Honermann  <tom@honermann.net>
5398
5399         * python/libstdcxx/v6/printers.py (register_type_printers): Add type
5400         printers for u8string and u8string_view.
5401
5402 2019-02-22  Tom Honermann  <tom@honermann.net>
5403
5404         * testsuite/18_support/byte/ops.cc: Validate
5405         std::to_integer<char8_t>, std::to_integer<char16_t>, and
5406         std::to_integer<char32_t>.
5407         * testsuite/18_support/numeric_limits/dr559.cc: Validate
5408         std::numeric_limits<char8_t>.
5409         * testsuite/18_support/numeric_limits/lowest.cc: Validate
5410         std::numeric_limits<char8_t>::lowest().
5411         * testsuite/18_support/numeric_limits/max_digits10.cc: Validate
5412         std::numeric_limits<char8_t>::max_digits10.
5413         * testsuite/18_support/type_info/fundamental.cc: Validate
5414         typeinfo for char8_t.
5415         * testsuite/20_util/from_chars/1_c++20_neg.cc: New test, validating
5416         std::from_chars with char8_t.
5417         * testsuite/20_util/hash/requirements/explicit_instantiation.cc:
5418         Validate explicit instantiation of std::hash<char8_t>.
5419         * testsuite/20_util/is_integral/value.cc: Validate
5420         std::is_integral<char8_t>.
5421         * testsuite/20_util/make_signed/requirements/typedefs-4.cc:
5422         Validate std::make_signed<char8_t>.
5423         * testsuite/21_strings/basic_string/cons/char/deduction.cc:
5424         Validate u8string construction from char8_t sources.
5425         * testsuite/21_strings/basic_string/types/pmr_typedefs.cc: Validate
5426         std::pmr::u8string.
5427         * testsuite/21_strings/basic_string_view/operations/compare/
5428         char/70483.cc: Validate substr operations on u8string_view.
5429         * testsuite/21_strings/basic_string_view/typedefs.cc: Validate that
5430         the u8string_view typedef is defined.
5431         * testsuite/21_strings/char_traits/requirements/
5432         constexpr_functions.cc: Validate char_traits<char8_t> constexpr
5433         member functions.
5434         * testsuite/21_strings/char_traits/requirements/
5435         constexpr_functions_c++17.cc: Validate char_traits<char8_t> C++17
5436         constexpr member functions.
5437         * testsuite/21_strings/headers/string/types_std_c++0x.cc: Validate
5438         that the u8string typedef is defined.
5439         * testsuite/22_locale/locale/cons/unicode.cc: Validate the presence
5440         of the std::codecvt<char16_t, char8_t, std::mbstate_t> and
5441         std::codecvt<char32_t, char8_t, std::mbstate_t> facets.
5442         * testsuite/29_atomics/atomic/cons/assign_neg.cc: Update line
5443         numbers.
5444         * testsuite/29_atomics/atomic/cons/copy_neg.cc: Likewise.
5445         * testsuite/29_atomics/atomic_integral/cons/assign_neg.cc:
5446         Likewise.
5447         * testsuite/29_atomics/atomic_integral/cons/copy_neg.cc: Likewise.
5448         * testsuite/29_atomics/atomic_integral/is_always_lock_free.cc:
5449         Validate std::atomic<char8_t>::is_always_lock_free
5450         * testsuite/29_atomics/atomic_integral/operators/bitwise_neg.cc:
5451         Update line numbers.
5452         * testsuite/29_atomics/atomic_integral/operators/decrement_neg.cc:
5453         Likewise.
5454         * testsuite/29_atomics/atomic_integral/operators/increment_neg.cc:
5455         Likewise.
5456         * testsuite/experimental/polymorphic_allocator/pmr_typedefs_string.cc:
5457         Validate std::experimental::pmr::u8string.
5458         * testsuite/experimental/string_view/typedefs.cc: Validate that the
5459         u8string_view typedef is defined.
5460         * testsuite/util/testsuite_common_types.h: Add char8_t, char16_t and
5461         char32_t to the typelists.
5462
5463 2019-02-22  Tom Honermann  <tom@honermann.net>
5464
5465         * include/ext/typelist.h: Constrain a partial specialization of
5466         typelist::detail::append_ to only match chain<T1,T2>.
5467
5468 2019-02-21  Jonathan Wakely  <jwakely@redhat.com>
5469
5470         PR libstdc++/89416
5471         * include/bits/alloc_traits.h (__is_alloc_insertable_impl): Replace
5472         class template with class. Replace move and copy member types with
5473         member alias templates, so they are only instantiated when needed.
5474         (__is_copy_insertable, __is_move_insertable): Adjust base class.
5475         * testsuite/23_containers/vector/modifiers/push_back/89130.cc: Enable
5476         test for C++11/14/17 as well.
5477         * testsuite/23_containers/vector/modifiers/push_back/89416.cc: New
5478         test.
5479
5480 2019-02-20  Jakub Jelinek  <jakub@redhat.com>
5481
5482         PR libstdc++/89402
5483         * src/c++98/compatibility-ldbl.cc (_ZNKSt4hashIeEclEe): Add
5484         _GLIBCXX_PURE to the alias declaration.
5485
5486 2019-02-19  Jonathan Wakely  <jwakely@redhat.com>
5487
5488         * testsuite/21_strings/basic_string/literals/types.cc
5489         [_GLIBCXX_USE_CHAR8_T]: Adjust expected string type for u8 literal.
5490         * testsuite/21_strings/basic_string/literals/values.cc
5491         [_GLIBCXX_USE_CHAR8_T]: Likewise.
5492         * testsuite/22_locale/codecvt/char16_t.cc: Adjust for u8 literals
5493         potentially having different type.
5494         * testsuite/22_locale/codecvt/char32_t.cc: Likewise.
5495         * testsuite/22_locale/codecvt/codecvt_utf8/79980.cc: Cast u8 literal
5496         to char.
5497         * testsuite/22_locale/codecvt/codecvt_utf8/wchar_t/1.cc: Likewise.
5498         * testsuite/22_locale/codecvt/utf8.cc: Likewise.
5499         * testsuite/22_locale/conversions/string/2.cc: Remove u8 prefix from
5500         string literals only using basic character set.
5501         * testsuite/22_locale/conversions/string/3.cc: Likewise. Cast other
5502         u8 literals to char.
5503         * testsuite/29_atomics/headers/atomic/macros.cc [_GLIBCXX_USE_CHAR8_T]:
5504         Test ATOMIC_CHAR8_T_LOCK_FREE.
5505         Add missing #error to ATOMIC_CHAR16_T_LOCK_FREE test.
5506         * testsuite/29_atomics/headers/atomic/types_std_c++0x.cc
5507         [_GLIBCXX_USE_CHAR8_T]: Check for std::atomic_char8_t.
5508         * testsuite/experimental/string_view/literals/types.cc
5509         [_GLIBCXX_USE_CHAR8_T]: Adjust expected string_view type for u8
5510         literal.
5511         * testsuite/experimental/string_view/literals/values.cc
5512         [_GLIBCXX_USE_CHAR8_T]: Likewise.
5513
5514 2019-02-19  Tom Honermann  <tom@honermann.net>
5515
5516         * testsuite/18_support/numeric_limits/char8_t.cc: New test cloned
5517         from char16_32_t.cc; validates numeric_limits<char8_t>.
5518         * testsuite/21_strings/basic_string/literals/types-char8_t.cc: New
5519         test cloned from types.cc; validates operator""s for char8_t
5520         returns u8string.
5521         * testsuite/21_strings/basic_string/literals/values-char8_t.cc: New
5522         test cloned from values.cc; validates construction and comparison
5523         of u8string values.
5524         * testsuite/21_strings/basic_string/requirements/
5525         /explicit_instantiation/char8_t/1.cc: New test cloned from
5526         char16_t/1.cc; validates explicit instantiation of
5527         basic_string<char8_t>.
5528         * testsuite/21_strings/basic_string_view/literals/types-char8_t.cc:
5529         New test cloned from types.cc; validates operator""sv for char8_t
5530         returns u8string_view.
5531         * testsuite/21_strings/basic_string_view/literals/
5532         values-char8_t.cc: New test cloned from values.cc; validates
5533         construction and comparison of u8string_view values.
5534         * testsuite/21_strings/basic_string_view/requirements/
5535         explicit_instantiation/char8_t/1.cc: New test cloned from
5536         char16_t/1.cc; validates explicit instantiation of
5537         basic_string_view<char8_t>.
5538         * testsuite/21_strings/char_traits/requirements/char8_t/65049.cc:
5539         New test cloned from char16_t/65049.cc; validates that
5540         char_traits<char8_t> is not vulnerable to the concerns in PR65049.
5541         * testsuite/21_strings/char_traits/requirements/char8_t/
5542         typedefs.cc: New test cloned from char16_t/typedefs.cc; validates
5543         that char_traits<char8_t> member typedefs are present and correct.
5544         * testsuite/21_strings/char_traits/requirements/
5545         explicit_instantiation/char8_t/1.cc: New test cloned from
5546         char16_t/1.cc; validates explicit instantiation of
5547         char_traits<char8_t>.
5548         * testsuite/22_locale/codecvt/char16_t-char8_t.cc: New test cloned
5549         from char16_t.cc: validates
5550         codecvt<char16_t, char8_t, mbstate_t>.
5551         * testsuite/22_locale/codecvt/char32_t-char8_t.cc: New test cloned
5552         from char32_t.cc: validates
5553         codecvt<char32_t, char8_t, mbstate_t>.
5554         * testsuite/22_locale/codecvt/utf8-char8_t.cc: New test cloned from
5555         utf8.cc; validates codecvt<char16_t, char8_t, std::mbstate_t> and
5556         codecvt<char32_t, char8_t, std::mbstate_t>.
5557         * testsuite/27_io/filesystem/path/native/string-char8_t.cc: New
5558         test cloned from string.cc; validates filesystem::path construction
5559         from char8_t input.
5560         * testsuite/experimental/feat-char8_t.cc: New test; validates that
5561         the __cpp_lib_char8_t feature test macro is defined with the
5562         correct value.
5563         * testsuite/experimental/filesystem/path/native/string-char8_t.cc:
5564         New test cloned from string.cc; validates filesystem::path
5565         construction from char8_t input.
5566         * testsuite/experimental/string_view/literals/types-char8_t.cc: New
5567         test cloned from types.cc; validates operator""sv for char8_t
5568         returns u8string_view.
5569         * testsuite/experimental/string_view/literals/values-char8_t.cc:
5570         New test cloned from values.cc; validates construction and
5571         comparison of u8string_view values.
5572         * testsuite/experimental/string_view/requirements/
5573         explicit_instantiation/char8_t/1.cc: New test cloned from
5574         char16_t/1.cc; validates explicit instantiation of
5575         basic_string_view<char8_t>.
5576         * testsuite/ext/char8_t/atomic-1.cc: New test; validates that
5577         ATOMIC_CHAR8_T_LOCK_FREE is not defined if char8_t support is not
5578         enabled.
5579
5580 2019-02-19  Tom Honermann  <tom@honermann.net>
5581
5582         P0482R5 char8_t: Standard library support
5583         * config/abi/pre/gnu-versioned-namespace.ver (CXXABI_2.0): Add
5584         typeinfo symbols for char8_t.
5585         * config/abi/pre/gnu.ver: Add CXXABI_1.3.12.
5586         (GLIBCXX_3.4.26): Add symbols for specializations of
5587         numeric_limits and codecvt that involve char8_t.
5588         (CXXABI_1.3.12): Add typeinfo symbols for char8_t.
5589         * include/bits/atomic_base.h: Add atomic_char8_t.
5590         * include/bits/basic_string.h: Add std::hash<u8string> and
5591         operator""s(const char8_t*, size_t).
5592         * include/bits/c++config: Define _GLIBCXX_USE_CHAR8_T and
5593         __cpp_lib_char8_t.
5594         * include/bits/char_traits.h: Add char_traits<char8_t>.
5595         * include/bits/codecvt.h: Add
5596         codecvt<char16_t, char8_t, mbstate_t>,
5597         codecvt<char32_t, char8_t, mbstate_t>,
5598         codecvt_byname<char16_t, char8_t, mbstate_t>, and
5599         codecvt_byname<char32_t, char8_t, mbstate_t>.
5600         * include/bits/cpp_type_traits.h: Add __is_integer<char8_t> to
5601         recognize char8_t as an integral type.
5602         * include/bits/fs_path.h: (path::__is_encoded_char): Recognize
5603         char8_t.
5604         (path::u8string): Return std::u8string when char8_t support is
5605         enabled.
5606         (path::generic_u8string): Likewise.
5607         (path::_S_convert): Handle conversion from char8_t input.
5608         (path::_S_str_convert): Likewise.
5609         * include/bits/functional_hash.h: Add hash<char8_t>.
5610         * include/bits/locale_conv.h (__str_codecvt_out): Add overloads for
5611         char8_t.
5612         * include/bits/locale_facets.h (_GLIBCXX_NUM_UNICODE_FACETS): Bump
5613         for new char8_t specializations.
5614         * include/bits/localefwd.h: Add missing declarations of
5615         codecvt<char16_t, char, mbstate_t> and
5616         codecvt<char32_t, char, mbstate_t>.  Add char8_t declarations
5617         codecvt<char16_t, char8_t, mbstate_t> and
5618         codecvt<char32_t, char8_t, mbstate_t>.
5619         * include/bits/postypes.h: Add u8streampos
5620         * include/bits/stringfwd.h: Add declarations of
5621         char_traits<char8_t> and u8string.
5622         * include/c_global/cstddef: Add __byte_operand<char8_t>.
5623         * include/experimental/bits/fs_path.h (path::__is_encoded_char):
5624         Recognize char8_t.
5625         (path::u8string): Return std::u8string when char8_t support is
5626         enabled.
5627         (path::generic_u8string): Likewise.
5628         (path::_S_convert): Handle conversion from char8_t input.
5629         (path::_S_str_convert): Likewise.
5630         * include/experimental/string: Add u8string.
5631         * include/experimental/string_view: Add u8string_view,
5632         hash<experimental::u8string_view>, and
5633         operator""sv(const char8_t*, size_t).
5634         * include/std/atomic: Add atomic<char8_t> and atomic_char8_t.
5635         * include/std/charconv (__is_int_to_chars_type): Recognize char8_t
5636         as a character type.
5637         * include/std/limits: Add numeric_limits<char8_t>.
5638         * include/std/string_view: Add u8string_view,
5639         hash<experimental::u8string_view>, and
5640         operator""sv(const char8_t*, size_t).
5641         * include/std/type_traits: Add __is_integral_helper<char8_t>,
5642         __make_unsigned<char8_t>, and __make_signed<char8_t>.
5643         * libsupc++/atomic_lockfree_defines.h: Define
5644         ATOMIC_CHAR8_T_LOCK_FREE.
5645         * src/c++11/Makefile.am: Compile with -fchar8_t when compiling
5646         codecvt.cc and limits.cc so that char8_t specializations of
5647         numeric_limits and codecvt and emitted.
5648         * src/c++11/Makefile.in: Likewise.
5649         * src/c++11/codecvt.cc: Define members of
5650         codecvt<char16_t, char8_t, mbstate_t>,
5651         codecvt<char32_t, char8_t, mbstate_t>,
5652         codecvt_byname<char16_t, char8_t, mbstate_t>, and
5653         codecvt_byname<char32_t, char8_t, mbstate_t>.
5654         * src/c++11/limits.cc: Define members of
5655         numeric_limits<char8_t>.
5656         * src/c++98/Makefile.am: Compile with -fchar8_t when compiling
5657         locale_init.cc and localename.cc.
5658         * src/c++98/Makefile.in: Likewise.
5659         * src/c++98/locale_init.cc: Add initialization for the
5660         codecvt<char16_t, char8_t, mbstate_t> and
5661         codecvt<char32_t, char8_t, mbstate_t> facets.
5662         * src/c++98/localename.cc: Likewise.
5663         * testsuite/util/testsuite_abi.cc: Validate ABI bump.
5664
5665 2019-02-18  Wilco Dijkstra  <wdijkstr@arm.com>
5666
5667         * 27_io/filesystem/operations/all.cc: Add dg-require-filesystem-ts.
5668         * 27_io/filesystem/operations/resize_file.cc: Likewise.
5669         * 27_io/filesystem/path/generation/normal2.cc: Likewise.
5670
5671 2019-02-14  Jonathan Wakely  <jwakely@redhat.com>
5672
5673         * doc/xml/manual/status_cxx2020.xml: Update P0887R1 status.
5674         * doc/html/*: Regenerate.
5675
5676         * doc/xml/manual/status_cxx2017.xml: Add P0063R3 to status table.
5677         * doc/html/*: Regenerate.
5678
5679         * doc/xml/manual/intro.xml: Document LWG 2586 status.
5680         * include/bits/uses_allocator.h (__uses_alloc): Use const lvalue
5681         allocator type in is_constructible checks.
5682         * testsuite/20_util/scoped_allocator/69293_neg.cc: Adjust dg-error.
5683         * testsuite/20_util/scoped_allocator/dr2586.cc: New test.
5684         * testsuite/20_util/tuple/cons/allocators.cc: Add test using
5685         problematic type from LWG 2586 discussion.
5686         * testsuite/20_util/uses_allocator/69293_neg.cc: Adjust dg-error.
5687         * testsuite/20_util/uses_allocator/cons_neg.cc: Likewise.
5688
5689         * configure.ac: Check for C11 timespec_get function.
5690         * crossconfig.m4 (freebsd, linux, gnu, cygwin, solaris, netbsd)
5691         (openbsd): Likewise
5692         * config.h.in: Regenerate.
5693         * configure: Regenerate.
5694         * include/c_global/ctime (timespec, timespec_get): Add to namespace
5695         std for C++17 and up.
5696
5697         * doc/xml/manual/intro.xml: Document LWG 2537 status.
5698         * include/bits/stl_queue.h
5699         (priority_queue(const Compare&, const Container&, const Alloc&))
5700         (priority_queue(const Compare&, Container&&, const Alloc&)): Call
5701         make_heap.
5702         * testsuite/23_containers/priority_queue/dr2537.cc: New test.
5703
5704         * doc/xml/manual/intro.xml: Document LWG 2566 status.
5705         * include/bits/stl_queue.h (queue, priority_queue): Add static
5706         assertions to enforce LWG 2566 requirement on value_type.
5707         * include/bits/stl_stack.h (stack): Likewise.
5708
5709         PR middle-end/89303
5710         * testsuite/20_util/enable_shared_from_this/89303.cc: New test.
5711
5712         * doc/xml/manual/intro.xml: Document LWG 2735 status.
5713         * include/bits/std_abs.h: Add comment about LWG 2735.
5714         * testsuite/26_numerics/headers/cstdlib/dr2735.cc: New test.
5715
5716 2019-02-13  Jonathan Wakely  <jwakely@redhat.com>
5717
5718         PR libstdc++/89345
5719         * include/std/version [__cpp_impl_destroying_delete]
5720         (__cpp_lib_destroying_delete): Only define for C++2a and later.
5721         * libsupc++/new [__cpp_impl_destroying_delete]
5722         (__cpp_lib_destroying_delete): Likewise.
5723         (destroying_delete_t, destroying_delete): Likewise, but define even
5724         when __cpp_impl_destroying_delete is not defined.
5725         * testsuite/18_support/destroying_delete.cc: New test.
5726
5727 2019-02-11  Jonathan Wakely  <jwakely@redhat.com>
5728
5729         PR libstdc++/89023
5730         * testsuite/17_intro/headers/c++2011/parallel_mode.cc: New test.
5731         * testsuite/17_intro/headers/c++2014/parallel_mode.cc: New test.
5732         * testsuite/17_intro/headers/c++2017/parallel_mode.cc: New test.
5733         * testsuite/28_regex/headers/regex/parallel_mode.cc: Remove.
5734
5735 2019-02-09  Jonathan Wakely  <jwakely@redhat.com>
5736
5737         PR libstdc++/71044
5738         * include/bits/fs_path.h (path::has_root_name)
5739         (path::has_root_directory, path::has_root_path)
5740         (path::has_relative_path, path::has_parent_path)
5741         (path::has_filename, path::has_stem, path::has_extension)
5742         (path::is_absolute, path::is_relative, path::_M_find_extension): Add
5743         noexcept.
5744         * src/c++17/fs_path.cc (path::has_root_name)
5745         (path::has_root_directory, path::has_root_path)
5746         (path::has_relative_path, path::has_parent_path)
5747         (path::has_filename, path::_M_find_extension): Add noexcept.
5748
5749 2019-02-06  Jonathan Wakely  <jwakely@redhat.com>
5750
5751         PR libstdc++/89102 (partial)
5752         * include/std/type_traits (common_type<>): Define.
5753         (common_type<T>): Derive from common_type<T, T>.
5754         * testsuite/20_util/common_type/requirements/explicit_instantiation.cc:
5755         Test zero-length template argument list.
5756         * testsuite/20_util/common_type/requirements/sfinae_friendly_1.cc:
5757         Test additional single argument cases.
5758         * testsuite/20_util/common_type/requirements/sfinae_friendly_2.cc:
5759         Adjust expected error.
5760
5761 2019-02-05  Jonathan Wakely  <jwakely@redhat.com>
5762
5763         PR libstdc++/89128
5764         * include/bits/stl_queue.h (queue, priority_queue): Add deduction
5765         guides.
5766         * include/bits/stl_stack.h (stack): Likewise.
5767         * testsuite/23_containers/priority_queue/deduction.cc: New test.
5768         * testsuite/23_containers/queue/deduction.cc: New test.
5769         * testsuite/23_containers/stack/deduction.cc: New test.
5770
5771         PR libstdc++/89194
5772         * include/std/type_traits (__is_convertible_helper)
5773         (__is_convertible_helper<_From, _To, false>): Revert changes to
5774         support is_nothrow_convertible.
5775         (__is_nt_convertible_helper): New helper.
5776         (is_nothrow_convertible): Use __is_nt_convertible_helper.
5777
5778         * testsuite/23_containers/vector/modifiers/push_back/49836.cc: Restore
5779         use of CopyConsOnlyType, but also test DelAnyAssign for completeness.
5780
5781         PR libstdc++/89130
5782         * include/bits/alloc_traits.h (__is_copy_insertable_impl): Rename to
5783         __is_alloc_insertable_impl. Replace single type member with two
5784         members, one for each of copy and move insertable.
5785         (__is_move_insertable): New trait for internal use.
5786         * include/bits/stl_vector.h (vector::_S_nothrow_relocate(true_type))
5787         (vector::_S_nothrow_relocate(true_type)): New functions to
5788         conditionally check if __relocate_a can throw.
5789         (vector::_S_use_relocate()): Dispatch to _S_nothrow_relocate based
5790         on __is_move_insertable.
5791         (vector::_S_do_relocate): New overloaded functions to conditionally
5792         call __relocate_a.
5793         (vector::_S_relocate): New function that dispatches to _S_do_relocate
5794         based on _S_use_relocate.
5795         * include/bits/vector.tcc (vector::reserve, vector::_M_realloc_insert)
5796         (vector::_M_default_append): Call _S_relocate instead of __relocate_a.
5797         * testsuite/23_containers/vector/modifiers/push_back/89130.cc: New.
5798
5799         PR libstdc++/89090
5800         * include/bits/stl_uninitialized.h (__relocate_a_1): Make unused
5801         parameter unnamed. Add message to static assertion.
5802         * include/bits/vector.tcc (vector::reserve, vector::_M_realloc_insert)
5803         (vector::_M_default_append): Use _GLIBCXX17_CONSTEXPR for if constexpr
5804         in C++11 code.
5805
5806 2019-02-05  Marc Glisse  <marc.glisse@inria.fr>
5807
5808         PR libstdc++/87106
5809         * include/bits/stl_uninitialized.h (__is_trivially_relocatable):
5810         Rename...
5811         (__is_bitwise_relocatable): ... to this.
5812         (__relocate_a_1): Adapt.
5813         * include/bits/stl_deque.h (__is_trivially_relocatable): Rename...
5814         (__is_bitwise_relocatable): ... to this.
5815
5816 2019-01-30  Jonathan Wakely  <jwakely@redhat.com>
5817
5818         PR libstdc++/89117
5819         * src/c++17/fs_path.cc (path::replace_extension): Erase extension from
5820         final component as well as from _M_pathname. Append the dot using
5821         operator+= instead of only to _M_pathname.
5822         (path::_M_find_extension): Reformat slightly.
5823         * testsuite/27_io/filesystem/path/modifiers/replace_extension.cc:
5824         Add more test cases.
5825
5826 2019-01-30  Ulrich Drepper  <drepper@redhat.com>
5827
5828         * doc/xml/manual/status_cxx2020.xml: Update P0600 entry.
5829
5830 2019-01-29  Jonathan Wakely  <jwakely@redhat.com>
5831
5832         * testsuite/26_numerics/headers/complex/synopsis.cc: Remove incorrect
5833         constexpr specifiers from arg and proj.
5834
5835         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Add missing exports for
5836         __shared_ptr instantiations used by gcc4-compatible ABI.
5837
5838         * include/experimental/forward_list (experimental::erase): Qualify
5839         call to erase_if.
5840         * include/experimental/list (experimental::erase): Likewise.
5841         * include/std/forward_list (std::erase): Likewise.
5842         * include/std/list (std::erase): Likewise.
5843
5844         * testsuite/20_util/reference_wrapper/result_type.cc: Disable for
5845         C++2a.
5846         * testsuite/20_util/reference_wrapper/typedefs-2.cc: Likewise.
5847         * testsuite/20_util/reference_wrapper/typedefs-3.cc: Likewise.
5848         * testsuite/20_util/reference_wrapper/typedefs.cc: Likewise.
5849         * testsuite/30_threads/async/54297.cc: Suppress nodiscard warning.
5850         * testsuite/ext/array_allocator/26875.cc: Likewise.
5851         * testsuite/ext/pool_allocator/allocate_chunk.cc: Likewise.
5852         * testsuite/util/replacement_memory_operators.h: Likewise.
5853         * testsuite/util/testsuite_allocator.h: Likewise.
5854
5855         * include/std/memory_resource (__pool_resource::_M_unpooled): Use
5856         normal mode vector, even for debug mode.
5857         * include/std/vector [_GLIBCXX_DEBUG] (_GLIBCXX_STD_C::pmr::vector):
5858         Define alias template for normal mode vector.
5859
5860 2019-01-28  Jonathan Wakely  <jwakely@redhat.com>
5861
5862         PR libstdc++/68737
5863         * config/locale/generic/c_locale.h (__convert_from_v)
5864         [_GLIBCXX_USE_C99_STDIO]: Also check _GLIBCXX_HAVE_BROKEN_VSNPRINTF.
5865         * config/os/hpux/os_defines.h: Define _GLIBCXX_HAVE_BROKEN_VSNPRINTF.
5866         * include/bits/locale_facets.tcc (num_put::_M_insert_float)
5867         [_GLIBCXX_USE_C99_STDIO]: Also check _GLIBCXX_HAVE_BROKEN_VSNPRINTF.
5868
5869 2019-01-24  Jonathan Wakely  <jwakely@redhat.com>
5870
5871         PR libstdc++/88840
5872         * include/bits/stl_vector.h (vector::__use_relocate): Replace static
5873         data member with static member function _S_use_relocate().
5874         * include/bits/vector.tcc (vector::reserve, vector::_M_realloc_insert)
5875         (vector::_M_default_append): Use _S_use_relocate() instead of
5876         __use_relocate.
5877
5878         * testsuite/27_io/filesystem/path/compare/strings.cc: Only compare
5879         sign of results.
5880
5881 2019-01-22  Jonathan Wakely  <jwakely@redhat.com>
5882
5883         PR libstdc++/88740
5884         * testsuite/util/testsuite_hooks.h [stderr] (VERIFY): Use fprintf to
5885         write to stderr instead of using printf.
5886
5887 2019-01-21  Jakub Jelinek  <jakub@redhat.com>
5888
5889         PR libstdc++/86590
5890         * include/bits/char_traits.h (__constant_string_p,
5891         __constant_char_array_p): Use __builtin_is_constant_evaluated if
5892         available.
5893
5894 2019-01-20  Ulrich Drepper  <drepper@redhat.com>
5895
5896         Implement C++20 P0600r1.
5897         * include/backward/hash_map: Add nodiscard attribute to empty.
5898         * include/backward/hash_set: Likewise.
5899         * backward/hashtable.h: Likewise.
5900         * include/bits/basic_string.h: Likewise.
5901         * include/bits/forward_list.h: Likewise.
5902         * include/bits/hashtable.h: Likewise.
5903         * include/bits/regex.h: Likewise.
5904         * include/bits/stl_deque.h: Likewise.
5905         * include/bits/stl_list.h: Likewise.
5906         * include/bits/stl_map.h: Likewise.
5907         * include/bits/stl_multimap.h: Likewise.
5908         * include/bits/stl_multiset.h: Likewise.
5909         * include/bits/stl_queue.h: Likewise.
5910         * include/bits/stl_set.h: Likewise.
5911         * include/bits/stl_stack.h: Likewise.
5912         * include/bits/stl_tree.h: Likewise.
5913         * include/bits/stl_vector.h: Likewise.
5914         * include/bits/unordered_map.h: Likewise.
5915         * include/bits/unordered_set.h: Likewise.
5916         * include/debug/array: Likewise.
5917         * include/experimental/any: Likewise.
5918         * include/experimental/bits/fs_path.h: Likewise.
5919         * include/experimental/internet: Likewise.
5920         * include/experimental/string_view: Likewise.
5921         * include/ext/pb_ds/detail/bin_search_tree_/info_fn_imps.hpp:
5922         Likewise.
5923         * include/ext/pb_ds/detail/binary_heap_/binary_heap_.hpp:
5924         Likewise.
5925         * include/ext/pb_ds/detail/binary_heap_/info_fn_imps.hpp:
5926         Likewise.
5927         * include/ext/pb_ds/detail/cc_hash_table_map_/cc_ht_map_.hpp:
5928         Likewise.
5929         * include/ext/pb_ds/detail/cc_hash_table_map_/info_fn_imps.hpp:
5930         Likewise.
5931         * include/ext/pb_ds/detail/cc_hash_table_map_/size_fn_imps.hpp:
5932         Likewise.
5933         * include/ext/pb_ds/detail/gp_hash_table_map_/gp_ht_map_.hpp:
5934         Likewise.
5935         * include/ext/pb_ds/detail/gp_hash_table_map_/info_fn_imps.hpp:
5936         Likewise.
5937         * include/ext/pb_ds/detail/left_child_next_sibling_heap_/
5938         info_fn_imps.hpp: Likewise.
5939         * include/ext/pb_ds/detail/left_child_next_sibling_heap_/
5940         left_child_next_sibling_heap_.hpp: Likewise.
5941         * include/ext/pb_ds/detail/list_update_map_/info_fn_imps.hpp:
5942         Likewise.
5943         * include/ext/pb_ds/detail/list_update_map_/lu_map_.hpp:
5944         Likewise.
5945         * include/ext/pb_ds/detail/ov_tree_map_/info_fn_imps.hpp:
5946         Likewise.
5947         * include/ext/pb_ds/detail/ov_tree_map_/ov_tree_map_.hp:
5948         Likewise.
5949         * include/ext/pb_ds/detail/pat_trie_/info_fn_imps.hpp:
5950         Likewise.
5951         * include/ext/pb_ds/detail/pat_trie_/pat_trie_.hpp:
5952         Likewise.
5953         * include/ext/pb_ds/detail/rc_binomial_heap_/rc.hpp:
5954         Likewise.
5955         * include/ext/pb_ds/detail/tree_trace_base.hpp: Likewise.
5956         * include/ext/pb_ds/trie_policy.hpp: Likewise.
5957         * include/ext/rope: Likewise.
5958         * include/ext/slist: Likewise.
5959         * include/ext/vstring.h: Likewise.
5960         * include/profile/array: Likewise.
5961         * include/std/array: Likewise.
5962         * include/tr1/array: Likewise.
5963         * include/tr1/hashtable.h: Likewise.
5964         * include/tr1/regex: Likewise.
5965         * include/tr2/dynamic_bitset: Likewise.
5966         * include/bits/alloc_traits.h: Add nodiscard attribute to
5967         allocate.
5968         * include/experimental/memory_resource: Likewise.
5969         * include/ext/alloc_traits.h: Likewise.
5970         * include/ext/array_allocator.h: Likewise.
5971         * include/ext/bitmap_allocator.h: Likewise.
5972         * include/ext/debug_allocator.h: Likewise.
5973         * include/ext/extptr_allocator.h: Likewise.
5974         * include/ext/mt_allocator.h: Likewise.
5975         * include/ext/new_allocator.h: Likewise.
5976         * include/ext/pool_allocator.h: Likewise.
5977         * include/ext/throw_allocator.h: Likewise.
5978         * include/std/scoped_allocator: Likewise.
5979         * libsupc++/eh_alloc.cc: Likewise.
5980         * include/std/future: Add nodiscard attribute to async.
5981         * libsupc++/new: Add nodiscard attribute to new.
5982
5983 2019-01-18  Jonathan Wakely  <jwakely@redhat.com>
5984
5985         PR libstdc++/87514
5986         PR libstdc++/87520
5987         PR libstdc++/88782
5988         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Export new symbol.
5989         * include/bits/shared_ptr.h
5990         (shared_ptr(_Sp_make_shared_tag, const Alloc&, Args&&...))
5991         (allocate_shared): Change to use new tag type.
5992         * include/bits/shared_ptr_base.h (_Sp_make_shared_tag::_S_eq):
5993         Declare new member function.
5994         (_Sp_alloc_shared_tag): Define new type.
5995         (_Sp_counted_ptr_inplace): Declare __shared_count<_Lp> as a friend.
5996         (_Sp_counted_ptr_inplace::_M_get_deleter) [!__cpp_rtti]: Use
5997         _Sp_make_shared_tag::_S_eq to check type_info.
5998         (__shared_count(Ptr, Deleter),__shared_count(Ptr, Deleter, Alloc)):
5999         Constrain to prevent being called with _Sp_alloc_shared_tag.
6000         (__shared_count(_Sp_make_shared_tag, const _Alloc&, Args&&...)):
6001         Replace constructor with ...
6002         (__shared_count(Tp*&, _Sp_alloc_shared_tag<_Alloc>, Args&&...)): Use
6003         reference parameter so address of the new object can be returned to
6004         the caller. Obtain the allocator from the tag type.
6005         (__shared_ptr(_Sp_make_shared_tag, const Alloc&, Args&&...)): Replace
6006         constructor with ...
6007         (__shared_ptr(_Sp_alloc_shared_tag<Alloc>, Args&&...)): Pass _M_ptr
6008         to the __shared_count constructor.
6009         (__allocate_shared): Change to use new tag type.
6010         * src/c++11/shared_ptr.cc (_Sp_make_shared_tag::_S_eq): Define.
6011
6012 2019-01-17  Jonathan Wakely  <jwakely@redhat.com>
6013
6014         * src/c++17/fs_ops.cc
6015         (equivalent(const path&, const path&, error_code&))
6016         [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Use GetFileInformationByHandle to
6017         compare files instead of relying on incomplete info returned by stat.
6018
6019         PR libstdc++/88884
6020         * src/c++17/fs_ops.cc (absolute(const path&, error_code&)): Do nothing
6021         if the path is already absolute.
6022         [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Normalize root-directory.
6023         [!_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Pass error_code to current_path.
6024
6025         PR libstdc++/88881
6026         * src/c++17/fs_ops.cc (canonical(const path&, error_code&))
6027         [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Normalize path, to match behaviour
6028         of filesystem::exists.
6029         (create_directories(const path&, error_code&)): Add assertions.
6030         (status(const path&, error_code&)) [_GLIBCXX_FILESYSTEM_IS_WINDOWS]:
6031         Add workaround for bug in _wstat for paths with trailing slash.
6032         * testsuite/27_io/filesystem/operations/create_directories.cc: Adjust
6033         for expected behaviour on mingw.
6034         * testsuite/experimental/filesystem/operations/create_directories.cc:
6035         Likewise.
6036         * testsuite/27_io/filesystem/operations/temp_directory_path.cc: Use
6037         "TMP" instead of "TMPDIR" and clean environment before each test. Do
6038         not test permissions on mingw targets.
6039
6040 2019-01-16  Jonathan Wakely  <jwakely@redhat.com>
6041
6042         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Add exports for fstream
6043         constructors and open members taking wide strings. Fix patterns for
6044         filesystem::path members to match wstring_view parameters. Add
6045         exports for shared_ptr members used by directory iterators.
6046         * src/c++17/fs_ops.cc (remove(const path&, error_code&)): Clear the
6047         error code parameter if the file doesn't exist.
6048         * src/filesystem/ops.cc (remove(const path&, error_code&)):
6049         Likewise.
6050         * testsuite/27_io/filesystem/operations/canonical.cc: Fix expected
6051         values for mingw targets, where "/" is not an absolute path. Do not
6052         test symlinks on mingw targets.
6053         * testsuite/experimental/filesystem/operations/canonical.cc: Likewise.
6054         * testsuite/27_io/filesystem/operations/copy.cc: Do not test symlinks
6055         on mingw targets.
6056         * testsuite/experimental/filesystem/operations/copy.cc: Likewise.
6057         * testsuite/27_io/filesystem/operations/create_directories.cc: Check
6058         that each component of the path is created.
6059         * testsuite/experimental/filesystem/operations/create_directories.cc:
6060         Likewise.
6061         * testsuite/27_io/filesystem/operations/exists.cc: Do not test
6062         permissions on mingw targets.
6063         * testsuite/experimental/filesystem/operations/exists.cc: Likewise.
6064         * testsuite/27_io/filesystem/operations/is_empty.cc: Likewise.
6065         * testsuite/experimental/filesystem/operations/is_empty.cc: Likewise.
6066         * testsuite/27_io/filesystem/operations/permissions.cc: XFAIL for
6067         mingw targets.
6068         * testsuite/experimental/filesystem/operations/permissions.cc:
6069         Likewise.
6070         * testsuite/27_io/filesystem/operations/remove.cc: Do not test
6071         symlinks or permissions on mingw targets.
6072         * testsuite/experimental/filesystem/operations/remove.cc: Likewise.
6073         * testsuite/27_io/filesystem/operations/remove_all.cc: Do not test
6074         symlinks on mingw targets.
6075         * testsuite/experimental/filesystem/operations/remove_all.cc:
6076         Likewise.
6077         * testsuite/27_io/filesystem/operations/status.cc: Do not test
6078         permissions on mingw targets.
6079         * testsuite/27_io/filesystem/operations/weakly_canonical.cc: Do not
6080         test symlinks on mingw targets.
6081         * testsuite/experimental/filesystem/operations/space.cc: Fix test
6082         for mingw targets.
6083
6084 2019-02-14  Ulrich Drepper  <drepper@redhat.com>
6085
6086         PR libstdc++/88738
6087         Warn about unused comparisons of shared_ptr/unique_ptr
6088         * include/bits/c++config [_GLIBCXX_NODISCARD]: Define.
6089         * include/bits/shared_ptr.h: Use it for operator ==, !=,
6090         <, <=, >, >= for shared_ptr.
6091         * include/bits/unique_ptr.h: Likewise for unique_ptr.
6092
6093 2019-01-15  Jonathan Wakely  <jwakely@redhat.com>
6094
6095         * include/bits/shared_ptr_base.h (__cpp_lib_shared_ptr_arrays): Define
6096         as 201611L, because P0497R0 changes are supported.
6097         * include/std/version (__cpp_lib_shared_ptr_arrays): Likewise.
6098
6099         * include/bits/erase_if.h [__cplusplus > 201703L]
6100         (__cpp_lib_erase_if): Only define for C++2a.
6101         * include/std/iterator [__cplusplus >= 201402L && !_GLIBCXX_DEBUG]
6102         (__cpp_lib_null_iterators): Define.
6103         * include/std/version [__cplusplus >= 201402L && !_GLIBCXX_DEBUG]
6104         (__cpp_lib_null_iterators): Define.
6105         [__cpp_impl_destroying_delete] (__cpp_lib_destroying_delete): Define.
6106
6107         * doc/xml/manual/status_cxx2017.xml: Document P0032R3 and P0307R2
6108         status.
6109         * include/bits/stl_uninitialized.h (__cpp_lib_raw_memory_algorithms):
6110         Define.
6111         * include/std/any (__cpp_lib_any): Define as 201606L, because P0032R3
6112         changes are supported.
6113         * include/std/optional (__cpp_lib_optional): Likewise.
6114         * include/std/variant (__cpp_lib_variant): Likewise.
6115         * include/std/version [!__STRICT_ANSI__]
6116         (__cpp_lib_uncaught_exceptions): Define as long integer.
6117         [__cplusplus >= 201703L] (__cpp_lib_any)
6118         (__cpp_lib_raw_memory_algorithms, __cpp_lib_uncaught_exceptions)
6119         (__cpp_lib_variant): Define for C++17.
6120         [__cplusplus >= 201703L] (__cpp_lib_optional): Update value and define
6121         as long integer.
6122         * libsupc++/exception (__cpp_lib_uncaught_exceptions): Define as long
6123         integer.
6124
6125         * doc/xml/manual/status_cxx2020.xml: Update P1123R0 status.
6126
6127 2019-01-12  Jonathan Wakely  <jwakely@redhat.com>
6128
6129         PR libstdc++/88811
6130         PR libstdc++/83306
6131         * src/filesystem/path.cc: Fix typo. If first path is empty, show []
6132         before second path.
6133         * testsuite/experimental/filesystem/filesystem_error/cons.cc: New
6134         test.
6135
6136 2019-01-11  Jonathan Wakely  <jwakely@redhat.com>
6137
6138         * doc/xml/manual/intro.xml: Include new section.
6139         * doc/xml/manual/status_cxx2017.xml: Document more
6140         implementation-defined properties of the library.
6141         * doc/xml/manual/status_cxx2020.xml: Document C++2a status.
6142         * doc/html/*: Regenerate.
6143
6144         * include/bits/refwrap.h [__cplusplus > 201703L]
6145         (_Refwrap_base_arg1, _Refwrap_base_arg2, _Reference_wrapper_base)
6146         (_Reference_wrapper_base_memfun): Do not define for C++2a.
6147         (reference_wrapper): Do not derive from _Reference_wrapper_base_memfun
6148         for C++2a.
6149         (reference_wrapper::operator()): Add static assertion.
6150         * testsuite/20_util/reference_wrapper/incomplete.cc: New test.
6151
6152         * include/std/chrono (duration_values::zero(), duration_values::min())
6153         (duration_values::max()): Add noexcept.
6154         (duration::zero(), duration::min(), duration::max()): Likewise.
6155         (time_point::zero(), time_point::min(), time_point::max()): Likewise.
6156         * testsuite/20_util/duration/requirements/noexcept.cc: New test.
6157         * testsuite/20_util/time_point/requirements/noexcept.cc: New test.
6158
6159         * include/std/version (__cpp_lib_erase_if): Move to C++20 group.
6160
6161 2019-01-11  Jakub Jelinek  <jakub@redhat.com>
6162
6163         * include/std/type_traits (__cpp_lib_is_constant_evaluated): Define.
6164         * include/std/version (__cpp_lib_is_constant_evaluated): Define.
6165
6166 2019-01-11  Jonathan Wakely  <jwakely@redhat.com>
6167
6168         PR libstdc++/88802
6169         * include/bits/functional_hash.h (hash<nullptr_t>): Define
6170         specialization for C++17 (P0513R0, LWG 2817).
6171         * testsuite/20_util/hash/nullptr.cc: New test.
6172
6173         PR libstdc++/88125
6174         * config/abi/pre/gnu.ver (GLIBCXX_3.4.6): Remove unused duplicate
6175         pattern for std::basic_stringbuf::str().
6176
6177         * config/abi/pre/gnu.ver (GLIBCXX_3.4): Correct recent changes to
6178         basic_ostream::operator<< patterns.
6179
6180 2019-01-10  Jonathan Wakely  <jwakely@redhat.com>
6181
6182         * testsuite/27_io/filesystem/operations/last_write_time.cc: Fix
6183         test failures on targets with 32-bit time_t.
6184
6185         * include/bits/erase_if.h: Define __cpp_lib_erase_if.
6186         * include/std/deque: Likewise.
6187         * include/std/forward_list: Likewise.
6188         * include/std/list: Likewise.
6189         * include/std/string: Likewise.
6190         * include/std/vector: Likewise.
6191         * include/std/version: Likewise.
6192         * testsuite/21_strings/basic_string/erasure.cc: Test macro.
6193         * testsuite/23_containers/deque/erasure.cc: Likewise.
6194         * testsuite/23_containers/forward_list/erasure.cc: Likewise.
6195         * testsuite/23_containers/list/erasure.cc: Likewise.
6196         * testsuite/23_containers/map/erasure.cc: Likewise.
6197         * testsuite/23_containers/set/erasure.cc: Likewise.
6198         * testsuite/23_containers/unordered_map/erasure.cc: Likewise.
6199         * testsuite/23_containers/unordered_set/erasure.cc: Likewise.
6200         * testsuite/23_containers/vector/erasure.cc: Likewise.
6201
6202         * include/experimental/internet [AI_NUMERICSERV]
6203         (resolver_base::numeric_service): Define conditionally.
6204         * testsuite/experimental/net/internet/resolver/base.cc: Test it
6205         conditionally.
6206         * testsuite/experimental/net/internet/resolver/ops/lookup.cc:
6207         Likewise.
6208
6209 2019-01-10  Ville Voutilainen  <ville.voutilainen@gmail.com>
6210             Jonathan Wakely  <jwakely@redhat.com>
6211
6212         Implement LWG 2221
6213         * config/abi/pre/gnu.ver (GLIBCXX_3.4): Tighten patterns.
6214         (GLIBCXX_3.4.26): Add new exports.
6215         * include/Makefile.am: Add ostream-inst.cc. Move string-inst.cc to
6216         correct list of sources.
6217         * include/Makefile.in: Regenerate.
6218         * include/std/ostream (operator<<(nullptr_t)): New member function.
6219         * src/c++17/ostream-inst.cc: New file.
6220         * testsuite/27_io/basic_ostream/inserters_other/char/lwg2221.cc: New
6221         test.
6222
6223 2019-01-10  Jonathan Wakely  <jwakely@redhat.com>
6224
6225         * testsuite/util/testsuite_fs.h (nonexistent_path): Include name
6226         of the source file containing the caller.
6227         * testsuite/27_io/filesystem/iterators/directory_iterator.cc: Remove
6228         directories created by test.
6229         * testsuite/27_io/filesystem/iterators/recursive_directory_iterator.cc:
6230         Likewise.
6231         * testsuite/experimental/filesystem/iterators/directory_iterator.cc:
6232         Likewise.
6233         * testsuite/experimental/filesystem/iterators/
6234         recursive_directory_iterator.cc: Likewise.
6235
6236 2019-01-10  Jakub Jelinek  <jakub@redhat.com>
6237
6238         PR tree-optimization/88775
6239         * include/bits/stl_function.h (greater<_Tp*>::operator(),
6240         less<_Tp*>::operator(), greater_equal<_Tp*>::operator(),
6241         less_equal<_Tp*>::operator()): Use __builtin_is_constant_evaluated
6242         instead of __builtin_constant_p if available.  Don't bother with
6243         the pointer comparison in C++11 and earlier.
6244
6245 2019-01-09  Sandra Loosemore  <sandra@codesourcery.com>
6246
6247         PR other/16615
6248
6249         * include/ext/bitmap_allocator.h: Mechanically replace "can not"
6250         with "cannot".
6251
6252 2019-01-09  Jonathan Wakely  <jwakely@redhat.com>
6253
6254         * testsuite/libstdc++-prettyprinters/cxx17.cc: Fix expected output
6255         for filesystem::path. Give variables more distinctive names.
6256
6257         * include/std/optional (_Optional_payload_base::_M_copy_assign): New
6258         member function to perform non-trivial assignment.
6259         (_Optional_payload_base::_M_move_assign): Likewise.
6260         (_Optional_payload<T, true, false, true>::operator=)
6261         (_Optional_payload<T, true, true, false>::operator=)
6262         (_Optional_payload<T, true, false, false>::operator=): Call
6263         _M_copy_assign and/or _M_move_assign to do non-trivial assignments.
6264
6265         PR libstdc++/88204
6266         * testsuite/26_numerics/complex/operators/more_constexpr.cc: Do not
6267         test std::complex<long double> if long double format is IBM128.
6268         * testsuite/26_numerics/complex/requirements/more_constexpr.cc:
6269         Likewise.
6270
6271 2019-01-08  Jonathan Wakely  <jwakely@redhat.com>
6272
6273         * testsuite/libstdc++-prettyprinters/compat.cc: Test printer support
6274         for old std::unique_ptr layout.
6275         * testsuite/libstdc++-prettyprinters/cxx17.cc: Fix std::variant test
6276         to become valueless. Add filesystem::path tests.
6277
6278         PR libstdc++/87855
6279         * include/std/optional (_Optional_payload_base): New class template
6280         for common code hoisted from _Optional_payload specializations. Use
6281         a template for the union, to allow a partial specialization for
6282         types with non-trivial destructors. Add constructors for in-place
6283         initialization to the union.
6284         (_Optional_payload(bool, const _Optional_payload&)): Use _M_construct
6285         to perform non-trivial copy construction, instead of relying on
6286         non-standard copy elision in a delegating constructor.
6287         (_Optional_payload(bool, _Optional_payload&&)): Likewise for
6288         non-trivial move construction.
6289         (_Optional_payload): Derive from _Optional_payload_base and use it
6290         for everything except the non-trivial assignment operators, which are
6291         defined as needed.
6292         (_Optional_payload<false, C, M>): Derive from the specialization
6293         _Optional_payload<true, false, false> and add a destructor.
6294         (_Optional_base_impl::_M_destruct, _Optional_base_impl::_M_reset):
6295         Forward to corresponding members of _Optional_payload.
6296         (_Optional_base_impl::_M_is_engaged, _Optional_base_impl::_M_get):
6297         Hoist common members from _Optional_base.
6298         (_Optional_base): Make all members and base class public.
6299         (_Optional_base::_M_get, _Optional_base::_M_is_engaged): Move to
6300         _Optional_base_impl.
6301         * python/libstdcxx/v6/printers.py (StdExpOptionalPrinter): Add
6302         support for new std::optional layout.
6303         * testsuite/libstdc++-prettyprinters/compat.cc: New test.
6304
6305         PR libstdc++/88066
6306         * include/bits/locale_conv.h: Use <> for includes not "".
6307         * include/ext/random: Likewise.
6308         * include/ext/vstring.h: Likewise.
6309
6310 2019-01-08  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
6311
6312         * config/abi/pre/gnu.ver (GLIBCXX_3.4): Tighten existing patterns.
6313         (GLIBCXX_3.4.21): Likewise.
6314
6315 2019-01-08  Jonathan Wakely  <jwakely@redhat.com>
6316
6317         PR libstdc++/88749
6318         * src/filesystem/ops.cc (last_write_time): Fix preprocessor condition
6319         to match the one that controls whether utimbuf and utime are declared.
6320
6321 2019-01-07  Jonathan Wakely  <jwakely@redhat.com>
6322
6323         PR libstdc++/87787
6324         * include/bits/char_traits.h (char_traits::move): Do not pass null
6325         pointers to memmove.
6326         * include/bits/locale_facets.h
6327         (ctype<char>::widen(const char*, const char*, char*)): Do not
6328         pass null pointers to memcpy.
6329         (ctype<char>::narrow(const char*, const char*, char, char*)):
6330         Likewise.
6331         (ctype<char>::do_widen(const char*, const char*, char*)):
6332         Likewise.
6333         (ctype<char>::do_narrow(const char*, const char*, char, char*)):
6334         Likewise.
6335
6336         * doc/xml/manual/spine.xml: Update copyright years.
6337         * doc/xml/manual/status_cxx2017.xml: Adjust note about -lstdc++fs.
6338         * doc/xml/manual/using.xml: Remove requirement to link with -lstdc++fs
6339         for C++17 filesystem library.
6340         * doc/html/*: Regenerate.
6341
6342         * acinclude.m4 (GLIBCXX_CHECK_FILESYSTEM_DEPS): Check for truncate.
6343         * config.h.in: Regenerate.
6344         * config/abi/pre/gnu.ver: Order patterns for filesystem operations
6345         alphabetically and add missing entries for copy_symlink,
6346         hard_link_count, rename, and resize_file.
6347         * configure: Regenerate.
6348         * src/c++17/fs_ops.cc (resize_file): Remove #if so posix::truncate is
6349         used unconditionally.
6350         * src/filesystem/ops-common.h (__gnu_posix::truncate)
6351         [!_GLIBCXX_HAVE_TRUNCATE]: Provide fallback definition that only
6352         supports truncating to zero length.
6353         * testsuite/27_io/filesystem/operations/all.cc: New test.
6354         * testsuite/27_io/filesystem/operations/resize_file.cc: New test.
6355
6356 2019-01-06  Jonathan Wakely  <jwakely@redhat.com>
6357
6358         PR libstdc++/86756
6359         * acinclude.m4 (GLIBCXX_CHECK_FILESYSTEM_DEPS): Check for utime and
6360         lstat and define _GLIBCXX_USE_UTIME and _GLIBCXX_USE_LSTAT.
6361         * config.h.in: Regenerate.
6362         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Export symbols for
6363         remaining std::filesystem types and functions.
6364         * configure: Regenerate.
6365         * src/c++17/Makefile.am: Add C++17 filesystem sources.
6366         * src/c++17/Makefile.in: Regenerate.
6367         * src/c++17/cow-fs_dir.cc: Move src/filesystem/cow-std-dir.cc to
6368         here, and change name of included file.
6369         * src/c++17/cow-fs_ops.cc: Move src/filesystem/cow-std-ops.cc to
6370         here, and change name of included file.
6371         * src/c++17/fs_dir.cc: Move src/filesystem/std-dir.cc to here. Change
6372         path to dir-common.h.
6373         * src/c++17/fs_ops.cc: Move src/filesystem/std-ops.cc to here. Change
6374         path to ops-common.h. Disable -Wunused-parameter warnings.
6375         (internal_file_clock): Define unconditionally.
6376         [!_GLIBCXX_HAVE_SYS_STAT_H] (internal_file_clock::from_stat): Do not
6377         define.
6378         (do_copy_file, do_space): Move definitions to ops.common.h.
6379         (copy, file_size, hard_link_count, last_write_time, space): Only
6380         perform operation when _GLIBCXX_HAVE_SYS_STAT_H is defined, otherwise
6381         report an error.
6382         (last_write_time, read_symlink): Remove unused attributes from
6383         parameters.
6384         * src/filesystem/Makefile.am: Remove C++17 filesystem sources.
6385         * src/filesystem/Makefile.in: Regenerate.
6386         * src/filesystem/cow-std-dir.cc: Move to src/c++17/cow-fs_dir.cc.
6387         * src/filesystem/cow-std-ops.cc: Move to src/c++17/cow-fs_ops.cc.
6388         * src/filesystem/std-dir.cc: Move to src/c++17/fs_dir.cc.
6389         * src/filesystem/std-ops.cc: Move to src/c++17/fs_ops.cc.
6390         * src/filesystem/dir-common.h [!_GLIBCXX_HAVE_DIRENT_H]: Define
6391         dummy types and functions instead of using #error.
6392         * src/filesystem/dir.cc [!_GLIBCXX_HAVE_DIRENT_H]: Use #error.
6393         * src/filesystem/ops-common.h [!_GLIBCXX_USE_LSTAT] (lstat): Define
6394         in terms of stat.
6395         [!_GLIBCXX_HAVE_UNISTD_H]: Define dummy types and functions.
6396         (do_copy_file, do_space): Move definitions here from std-ops.cc.
6397         * src/filesystem/ops.cc: Adjust calls to do_copy_file and do_space
6398         to account for new namespace.
6399         * testsuite/27_io/filesystem/directory_entry/86597.cc: Remove
6400         -lstdc++fs from dg-options.
6401         * testsuite/27_io/filesystem/directory_entry/lwg3171.cc: Likewise.
6402         * testsuite/27_io/filesystem/file_status/1.cc: Likewise.
6403         * testsuite/27_io/filesystem/filesystem_error/cons.cc: Likewise.
6404         * testsuite/27_io/filesystem/filesystem_error/copy.cc: Likewise.
6405         * testsuite/27_io/filesystem/iterators/directory_iterator.cc:
6406         Likewise.
6407         * testsuite/27_io/filesystem/iterators/pop.cc: Likewise.
6408         * testsuite/27_io/filesystem/iterators/recursive_directory_iterator.cc:
6409         Likewise.
6410         * testsuite/27_io/filesystem/operations/absolute.cc: Likewise.
6411         * testsuite/27_io/filesystem/operations/canonical.cc: Likewise.
6412         * testsuite/27_io/filesystem/operations/copy.cc: Likewise.
6413         * testsuite/27_io/filesystem/operations/copy_file.cc: Likewise.
6414         * testsuite/27_io/filesystem/operations/create_directories.cc:
6415         Likewise.
6416         * testsuite/27_io/filesystem/operations/create_directory.cc: Likewise.
6417         * testsuite/27_io/filesystem/operations/create_symlink.cc: Likewise.
6418         * testsuite/27_io/filesystem/operations/current_path.cc: Likewise.
6419         * testsuite/27_io/filesystem/operations/equivalent.cc: Likewise.
6420         * testsuite/27_io/filesystem/operations/exists.cc: Likewise.
6421         * testsuite/27_io/filesystem/operations/file_size.cc: Likewise.
6422         * testsuite/27_io/filesystem/operations/is_empty.cc: Likewise.
6423         * testsuite/27_io/filesystem/operations/last_write_time.cc: Likewise.
6424         * testsuite/27_io/filesystem/operations/permissions.cc: Likewise.
6425         * testsuite/27_io/filesystem/operations/proximate.cc: Likewise.
6426         * testsuite/27_io/filesystem/operations/read_symlink.cc: Likewise.
6427         * testsuite/27_io/filesystem/operations/relative.cc: Likewise.
6428         * testsuite/27_io/filesystem/operations/remove.cc: Likewise.
6429         * testsuite/27_io/filesystem/operations/remove_all.cc: Likewise.
6430         * testsuite/27_io/filesystem/operations/space.cc: Likewise.
6431         * testsuite/27_io/filesystem/operations/status.cc: Likewise.
6432         * testsuite/27_io/filesystem/operations/symlink_status.cc: Likewise.
6433         * testsuite/27_io/filesystem/operations/temp_directory_path.cc:
6434         Likewise.
6435         * testsuite/27_io/filesystem/operations/weakly_canonical.cc: Likewise.
6436
6437
6438         PR libstdc++/86756
6439         * config/abi/pre/gnu.ver (GLIBCXX_3.4): Make various patterns for
6440         typeinfo and vtables less greedy.
6441         (GLIBCXX_3.4.26): Export symbols for std::filesystem::path.
6442         * src/c++17/Makefile.am: Add fs_path.cc and cow-fs_path.cc.
6443         * src/c++17/Makefile.in: Regenerate.
6444         * src/c++17/cow-fs_path.cc: Move src/filesystem/cow-std-path.cc to
6445         here, and change name of included file.
6446         * src/c++17/fs_path.cc: Move src/filesystem/std-path.cc to here.
6447         * src/filesystem/Makefile.am: Remove std-path.cc and cow-std-path.cc
6448         from sources.
6449         * src/filesystem/Makefile.in: Regenerate.
6450         * src/filesystem/cow-std-path.cc: Move to src/c++17/cow-fs_path.cc.
6451         * src/filesystem/std-path.cc: Move to src/c++17/fs_path.cc.
6452         * testsuite/27_io/filesystem/path/append/path.cc: Remove -lstdc++fs
6453         from dg-options and remove dg-require-filesystem-ts.
6454         * testsuite/27_io/filesystem/path/append/source.cc: Likewise.
6455         * testsuite/27_io/filesystem/path/assign/assign.cc: Likewise.
6456         * testsuite/27_io/filesystem/path/assign/copy.cc: Likewise.
6457         * testsuite/27_io/filesystem/path/compare/compare.cc: Likewise.
6458         * testsuite/27_io/filesystem/path/compare/lwg2936.cc: Likewise.
6459         * testsuite/27_io/filesystem/path/compare/path.cc: Likewise.
6460         * testsuite/27_io/filesystem/path/compare/strings.cc: Likewise.
6461         * testsuite/27_io/filesystem/path/concat/path.cc: Likewise.
6462         * testsuite/27_io/filesystem/path/concat/strings.cc: Likewise.
6463         * testsuite/27_io/filesystem/path/construct/80762.cc: Likewise.
6464         * testsuite/27_io/filesystem/path/construct/copy.cc: Likewise.
6465         * testsuite/27_io/filesystem/path/construct/default.cc: Likewise.
6466         * testsuite/27_io/filesystem/path/construct/format.cc: Likewise.
6467         * testsuite/27_io/filesystem/path/construct/locale.cc: Likewise.
6468         * testsuite/27_io/filesystem/path/construct/range.cc: Likewise.
6469         * testsuite/27_io/filesystem/path/construct/string_view.cc: Likewise.
6470         * testsuite/27_io/filesystem/path/decompose/extension.cc: Likewise.
6471         * testsuite/27_io/filesystem/path/decompose/filename.cc: Likewise.
6472         * testsuite/27_io/filesystem/path/decompose/parent_path.cc: Likewise.
6473         * testsuite/27_io/filesystem/path/decompose/relative_path.cc: Likewise.
6474         * testsuite/27_io/filesystem/path/decompose/root_directory.cc:
6475         Likewise.
6476         * testsuite/27_io/filesystem/path/decompose/root_name.cc: Likewise.
6477         * testsuite/27_io/filesystem/path/decompose/root_path.cc: Likewise.
6478         * testsuite/27_io/filesystem/path/decompose/stem.cc: Likewise.
6479         * testsuite/27_io/filesystem/path/generation/normal.cc: Likewise.
6480         * testsuite/27_io/filesystem/path/generation/normal2.cc: Likewise.
6481         * testsuite/27_io/filesystem/path/generation/proximate.cc: Likewise.
6482         * testsuite/27_io/filesystem/path/generation/relative.cc: Likewise.
6483         * testsuite/27_io/filesystem/path/generic/generic_string.cc: Likewise.
6484         * testsuite/27_io/filesystem/path/itr/components.cc: Likewise.
6485         * testsuite/27_io/filesystem/path/itr/traversal.cc: Likewise.
6486         * testsuite/27_io/filesystem/path/modifiers/clear.cc: Likewise.
6487         * testsuite/27_io/filesystem/path/modifiers/make_preferred.cc:
6488         Likewise.
6489         * testsuite/27_io/filesystem/path/modifiers/remove_filename.cc:
6490         Likewise.
6491         * testsuite/27_io/filesystem/path/modifiers/replace_extension.cc:
6492         Likewise.
6493         * testsuite/27_io/filesystem/path/modifiers/replace_filename.cc:
6494         Likewise.
6495         * testsuite/27_io/filesystem/path/modifiers/swap.cc: Likewise.
6496         * testsuite/27_io/filesystem/path/native/string.cc: Likewise.
6497         * testsuite/27_io/filesystem/path/nonmember/append.cc: Likewise.
6498         * testsuite/27_io/filesystem/path/nonmember/hash_value.cc: Likewise.
6499         * testsuite/27_io/filesystem/path/query/empty.cc: Likewise.
6500         * testsuite/27_io/filesystem/path/query/has_extension.cc: Likewise.
6501         * testsuite/27_io/filesystem/path/query/has_filename.cc: Likewise.
6502         * testsuite/27_io/filesystem/path/query/has_parent_path.cc: Likewise.
6503         * testsuite/27_io/filesystem/path/query/has_relative_path.cc: Likewise.
6504         * testsuite/27_io/filesystem/path/query/has_root_directory.cc:
6505         Likewise.
6506         * testsuite/27_io/filesystem/path/query/has_root_name.cc: Likewise.
6507         * testsuite/27_io/filesystem/path/query/has_root_path.cc: Likewise.
6508         * testsuite/27_io/filesystem/path/query/has_stem.cc: Likewise.
6509         * testsuite/27_io/filesystem/path/query/is_absolute.cc: Likewise.
6510         * testsuite/27_io/filesystem/path/query/is_relative.cc: Likewise.
6511
6512         PR libstdc++/87431
6513         * include/std/variant (_Variant_storage<true, _Types...>::_M_valid):
6514         Check is_trivially_copyable instead of is_scalar.
6515         (variant::emplace<N, Args>(Args&&...)): If construction of the new
6516         contained value can throw and its type is trivially copyable then
6517         construct into a temporary variant and move from it, to provide the
6518         strong exception safety guarantee.
6519         (variant::emplace<N, U, Args>(initializer_list<U>, Args&&...)):
6520         Likewise.
6521         * testsuite/20_util/variant/87431.cc: New test.
6522         * testsuite/20_util/variant/run.cc: Adjust test so that throwing
6523         conversion causes valueless state.
6524
6525         PR libstdc++/88607
6526         * testsuite/17_intro/headers/c++1998/charset.cc: New test.
6527         * testsuite/17_intro/headers/c++2011/charset.cc: New test.
6528         * testsuite/17_intro/headers/c++2014/charset.cc: New test.
6529         * testsuite/17_intro/headers/c++2017/charset.cc: New test.
6530         * testsuite/17_intro/headers/c++2020/charset.cc: New test.
6531
6532 2019-01-05  Jonathan Wakely  <jwakely@redhat.com>
6533
6534         * include/bits/fs_fwd.h (__file_clock): Define new clock.
6535         (file_time_type): Redefine in terms of __file_clock.
6536         * src/filesystem/ops-common.h (file_time): Add FIXME comment about
6537         overflow.
6538         * src/filesystem/std-ops.cc (is_set(perm_options, perm_options)): Give
6539         internal linkage.
6540         (internal_file_lock): New helper type for accessing __file_clock.
6541         (do_copy_file): Use internal_file_lock to convert system time to
6542         file_time_type.
6543         (last_write_time(const path&, error_code&)): Likewise.
6544         (last_write_time(const path&, file_time_type, error_code&)): Likewise.
6545
6546 2019-01-04  Jonathan Wakely  <jwakely@redhat.com>
6547
6548         * config/abi/pre/gnu.ver (GLIBCXX_3.4.21): Make patterns less greedy
6549         for const member functions of std::basic_string.
6550         (GLIBCXX_3.4.26): Export member functions of std::basic_string added
6551         in C++17.
6552         * include/bits/basic_string.h (basic_string(__sv_wrapper, const A&)):
6553         Make non-standard constructor private.
6554         [!_GLIBCXX_USE_CXX11_ABI] (basic_string(__sv_wrapper, const A&)):
6555         Likewise.
6556         * include/bits/basic_string.tcc (std::string, std::wstring): Declare
6557         explicit instantiations for C++17 as well as earlier dialects.
6558         * src/c++17/Makefile.am: Add new source files.
6559         * src/c++17/Makefile.in: Regenerate.
6560         * src/c++17/cow-string-inst.cc: New file defining explicit
6561         instantiations for basic_string member functions added in C++17.
6562         * src/c++17/string-inst.cc: Likewise.
6563
6564         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Export allocator-extended
6565         copy/move constructors for old std::basic_string.
6566         * include/bits/basic_string.h [!_GLIBCXX_USE_CXX11_ABI]
6567         (basic_string::reference, basic_string::const_reference): Define
6568         as plain references for C++11 and later.
6569         (basic_string::basic_string()): Put constructor body outside
6570         preprocessor conditional groups.
6571         (basic_string::basic_string(basic_string&&)): Move _Alloc_hider
6572         instead of copying it.
6573         (basic_string::basic_string(const basic_string&, const _Alloc&)):
6574         Define.
6575         (basic_string::basic_string(basic_string&&, const _Alloc&)):
6576         Define.
6577         * include/bits/fs_path.h [!_GLIBCXX_USE_CXX11_ABI]: Remove special
6578         cases for old basic_string.
6579         * testsuite/21_strings/basic_string/cons/char/8.cc: Test
6580         allocator-extended constructors unconditionally. Add extra members to
6581         allocator type when using old string ABI.
6582         * testsuite/21_strings/basic_string/allocator/71964.cc: Enable test
6583         for old string ABI.
6584         * testsuite/21_strings/basic_string/cons/wchar_t/8.cc: Likewise.
6585
6586         * testsuite/23_containers/list/61347.cc: Avoid spurious failure when
6587         -fno-inline added to test flags.
6588
6589         * testsuite/21_strings/basic_string/requirements/
6590         explicit_instantiation/debug.cc: Remove XFAIL for old ABI.
6591
6592         * testsuite/27_io/filesystem/filesystem_error/copy.cc: Fix static
6593         assertion failures with old std::string ABI.
6594
6595         * include/bits/fs_path.h (path::_List::erase): Replace both overloads
6596         with ...
6597         (path::pop_back(), path::_M_erase_from(const_iterator)): New member
6598         functions that will only erase elements at the end.
6599         * src/filesystem/std-path.cc (path::_List::_Impl::pop_back()): Define.
6600         (path::_List::_Impl::_M_erase_from(const_iterator)): Define.
6601         (path::_List::operator=(const _List&)): Use _M_erase_from(p) instead
6602         of erase(p, end()).
6603         (path::_List::pop_back()): Define.
6604         (path::_List::_M_erase_from(const_iterator)): Define.
6605         (path::operator/=(const path&)): Use pop_back to remove last component
6606         and _M_erase_from to remove multiple components.
6607         (path::_M_append(basic_string_view<value_type>)): Likewise.
6608         (path::operator+=(const path&)): Likewise.
6609         (path::_M_concat(basic_string_view<value_type>)): Likewise.
6610         (path::remove_filename()): Likewise.
6611         (path::lexically_normal()): Use _List::_Impl iterators instead of
6612         path::iterator. Use pop_back to remove components from the end. Clear
6613         trailing filename, instead of using erase(const_iterator) to remove
6614         a non-final component.
6615         * testsuite/27_io/filesystem/path/generation/normal.cc: Test
6616         additional cases.
6617         * testsuite/27_io/filesystem/path/generation/normal2.cc: New test.
6618
6619         * src/filesystem/std-path.cc (path::operator+=(const path&)): Fix
6620         incorrect treatment of empty filename after trailing slash.
6621         * testsuite/27_io/filesystem/path/concat/path.cc: Test problem case.
6622
6623         * testsuite/21_strings/basic_string/modifiers/assign/char/
6624         move_assign_optim.cc: Avoid spurious failure when -fno-inline added
6625         to test flags.
6626         * testsuite/21_strings/basic_string/modifiers/assign/wchar_t/
6627         move_assign_optim.cc: Likewise.
6628
6629 2019-01-03  Jonathan Wakely  <jwakely@redhat.com>
6630             Jakub Jelinek  <jakub@redhat.com>
6631
6632         PR libstdc++/88607
6633         * include/experimental/memory: Replace UTF-8 quote characters.
6634         * include/std/future: Replace UTF-8 "em dash" characters.
6635
6636 2019-01-03  Jonathan Wakely  <jwakely@redhat.com>
6637
6638         PR libstdc++/88607
6639         * include/bits/forward_list.h: Replace UTF-8 "ligature fi" character.
6640         * include/debug/forward_list: Likewise.
6641         * include/experimental/bits/shared_ptr.h: Remove UTF-8 "section sign"
6642         character.
6643         * include/experimental/chrono: Likewise.
6644         * include/experimental/functional: Likewise.
6645         * include/experimental/ratio: Likewise.
6646         * include/experimental/system_error: Likewise.
6647         * include/experimental/tuple: Likewise.
6648         * include/experimental/type_traits: Likewise.
6649         * include/parallel/workstealing.h: Replace UTF-8 "en dash" character.
6650         * include/parallel/multiseq_selection.h: Likewise.
6651
6652         PR libstdc++/88681
6653         * config/abi/pre/gnu.ver: Add missing exports.
6654         * testsuite/22_locale/collate_byname/88681.cc: New test.
6655         * testsuite/22_locale/time_get/get/char/88681.cc: New test.
6656         * testsuite/22_locale/time_get/get/wchar_t/88681.cc: New test.
6657
6658 2019-01-02  Jonathan Wakely  <jwakely@redhat.com>
6659
6660         * testsuite/23_containers/map/cons/deduction.cc: Test deduction from
6661         initializer_list<value_type> and from input iterator ranges.
6662         * testsuite/23_containers/multimap/cons/deduction.cc: Likewise.
6663
6664         * testsuite/experimental/string_view/element_access/char/empty.cc:
6665         Fix year range in copyright header.
6666
6667 2019-01-02  Joel Brobecker  <brobecker@adacore.com>
6668
6669         * testsuite/21_strings/basic_string_view/element_access/char/empty.cc:
6670         Fix year range in copyright header.
6671
6672 2019-01-01  Jakub Jelinek  <jakub@redhat.com>
6673
6674         Update copyright years.
6675 \f
6676 Copyright (C) 2019 Free Software Foundation, Inc.
6677
6678 Copying and distribution of this file, with or without modification,
6679 are permitted in any medium without royalty provided the copyright
6680 notice and this notice are preserved.