libstdc++-v3/ChangeLog

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