libstdc++-v3/ChangeLog

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