libstdc++-v3/ChangeLog

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