libstdc++-v3/ChangeLog

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