libstdc++-v3/ChangeLog

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