libstdc++-v3/ChangeLog

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