libstdc++-v3/ChangeLog

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