libstdc++-v3/ChangeLog

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