libstdc++-v3/ChangeLog

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