libstdc++-v3/ChangeLog

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