libstdc++-v3/ChangeLog

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