libstdc++-v3/ChangeLog

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