libstdc++-v3/ChangeLog

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