libstdc++-v3/ChangeLog

   1 2019-10-30  Jonathan Wakely  <jwakely@redhat.com>
   2
   3         * include/std/bit (__cpp_lib_bitops): Define.
   4         * include/std/version (__cpp_lib_constexpr): Remove.
   5         (__cpp_lib_bitops, __cpp_lib_constexpr_dynamic_alloc): Define.
   6         * testsuite/26_numerics/bit/header.cc: New test.
   7         * testsuite/26_numerics/bit/header-2.cc: New test.
   8         * testsuite/20_util/allocator_traits/header.cc: New test.
   9         * testsuite/20_util/allocator_traits/header-2.cc: New test.
  10
  11         * include/bits/stl_iterator.h (namespace __gnu_cxx): Remove
  12         using-declarations for std::iterator and std::iterator_traits.
  13         (__gnu_cxx::__normal_iterator): Qualify iterator_traits.
  14         * include/ext/algorithm (namespace __gnu_cxx): Remove
  15         using-declarations for std names and qualify those names when used.
  16         Also refer to std::min in parentheses to protect against function-like
  17         macros.
  18         * include/ext/rc_string_base.h: Qualify iterator_traits.
  19         * include/ext/sso_string_base.h: Qualify iterator_traits.
  20
  21         PR libstdc++/92272
  22         * include/bits/stl_bvector.h (_Bit_iterator::pointer)
  23         (_Bit_const_iterator::pointer): Define as void for C++20.
  24         * include/bits/stl_iterator.h (reverse_iterator::operator->()): Add
  25         constraints for C++20.
  26         (__normal_iterator::iterator_concept): Define for C++20.
  27         * include/bits/streambuf_iterator.h (istreambuf_iterator::pointer):
  28         Define as void for C++20.
  29         (ostreambuf_iterator::difference_type): Define as ptrdiff_t for C++20.
  30         (ostreambuf_iterator::ostreambuf_iterator()): Add default constructor
  31         for C++20.
  32         * testsuite/23_containers/vector/bool/iterator_c++20.cc: New test.
  33         * testsuite/24_iterators/bidirectional/concept.cc: New test.
  34         * testsuite/24_iterators/bidirectional/tag.cc: New test.
  35         * testsuite/24_iterators/contiguous/concept.cc: New test.
  36         * testsuite/24_iterators/contiguous/tag.cc: New test.
  37         * testsuite/24_iterators/forward/concept.cc: New test.
  38         * testsuite/24_iterators/forward/tag.cc: New test.
  39         * testsuite/24_iterators/input/concept.cc: New test.
  40         * testsuite/24_iterators/input/tag.cc: New test.
  41         * testsuite/24_iterators/istreambuf_iterator/requirements/typedefs.cc:
  42         New test.
  43         * testsuite/24_iterators/ostreambuf_iterator/requirements/typedefs.cc:
  44         New test.
  45         * testsuite/24_iterators/output/concept.cc: New test.
  46         * testsuite/24_iterators/output/tag.cc: New test.
  47         * testsuite/24_iterators/random_access/concept.cc: New test.
  48         * testsuite/24_iterators/random_access/tag.cc: New test.
  49         * testsuite/24_iterators/range_operations/advance_debug_neg.cc: New
  50         test.
  51         * testsuite/24_iterators/random_access_iterator/26020.cc: Move to ...
  52         * testsuite/24_iterators/operations/26020.cc: ... here.
  53         * testsuite/24_iterators/random_access_iterator/
  54         string_vector_iterators.cc: Move to ...
  55         * testsuite/24_iterators/random_access/string_vector_iterators.cc: ...
  56         here.
  57
  58         * testsuite/util/testsuite_iterators.h: Fix typo in __cplusplus check.
  59
  60 2019-10-29  Jonathan Wakely  <jwakely@redhat.com>
  61
  62         * include/bits/range_access.h (ranges::disable_sized_range)
  63         (ranges::begin, ranges::end, ranges::cbegin, ranges::cend)
  64         (ranges::rbegin, ranges::rend, ranges::crbegin, ranges::crend)
  65         (ranges::size, ranges::empty, ranges::data, ranges::cdata)
  66         (ranges::range, ranges::sized_range, ranges::advance, ranges::distance)
  67         (ranges::next, ranges::prev): Guard with __cpp_lib_concepts.
  68         * include/bits/stl_iterator.h (disable_sized_sentinel): Likewise.
  69
  70         * include/bits/alloc_traits.h (__cpp_lib_constexpr_dynamic_alloc):
  71         Define.
  72         (allocator_traits::_S_construct, allocator_traits::_S_destroy)
  73         (__alloc_on_copy, __alloc_on_move, __alloc_on_swap): Use
  74         _GLIBCXX14_CONSTEXPR instead of constexpr.
  75         * include/bits/stl_construct.h (_Destroy): Likewise.
  76
  77         * include/Makefile.am: Add new header.
  78         * include/Makefile.in: Regenerate.
  79         * include/bits/iterator_concepts.h: New header.
  80         (contiguous_iterator_tag, iter_reference_t, ranges::iter_move)
  81         (iter_rvalue_reference_t, incrementable_traits, iter_difference_t)
  82         (readable_traits, iter_value_t, readable, iter_common_reference_t)
  83         (writable, waekly_incrementable, incrementable)
  84         (input_or_output_iterator, sentinel_for, disable_sized_sentinel)
  85         (sized_sentinel_for, input_iterator, output_iterator)
  86         (forward_iterator, bidirectional_iterator, random_access_iterator)
  87         (contiguous_iterator, indirectly_unary_invocable)
  88         (indirectly_regular_unary_invocable, indirect_unary_predicate)
  89         (indirect_relation, indirect_strict_weak_order, indirect_result_t)
  90         (projected, indirectly_movable, indirectly_movable_storable)
  91         (indirectly_copyable, indirectly_copyable_storable, ranges::iter_swap)
  92         (indirectly_swappable, indirectly_comparable, permutable, mergeable)
  93         (sortable, unreachable_sentinel_t, unreachable_sentinel)
  94         (default_sentinel_t, default_sentinel): Define.
  95         (__detail::__cpp17_iterator, __detail::__cpp17_input_iterator)
  96         (__detail::__cpp17_fwd_iterator, __detail::__cpp17_bidi_iterator)
  97         (__detail::__cpp17_randacc_iterator): Define.
  98         (__iterator_traits): Define constrained specializations.
  99         * include/bits/move.h (move): Only use old concept check for C++98.
 100         * include/bits/range_access.h (ranges::disable_sized_range)
 101         (ranges::begin, ranges::end, ranges::cbegin, ranges::cend)
 102         (ranges::rbegin, ranges::rend, ranges::crbegin, ranges::crend)
 103         (ranges::size, ranges::empty, ranges::data, ranges::cdata): Define
 104         new customization points for C++20.
 105         (ranges::range, ranges::sized_range): Define new concepts for C++20.
 106         (ranges::advance, ranges::distance, ranges::next, ranges::prev):
 107         Define new functions for C++20.
 108         (__adl_end, __adl_cdata, __adl_cbegin, __adl_cend, __adl_rbegin)
 109         (__adl_rend, __adl_crbegin, __adl_crend, __adl_cdata, __adl_size)
 110         (__adl_empty): Remove.
 111         * include/bits/stl_iterator.h (disable_sized_sentinel): Specialize
 112         for reverse_iterator.
 113         * include/bits/stl_iterator_base_types.h (contiguous_iterator_tag):
 114         Define new struct for C++20.
 115         (iterator_traits<_Tp*>): Constrain partial specialization in C++20.
 116         * include/std/concepts (__is_class_or_enum): Move to __detail
 117         namespace.
 118         * testsuite/20_util/forward/c_neg.cc: Adjust dg-error line number.
 119         * testsuite/20_util/forward/f_neg.cc: Likewise.
 120         * testsuite/24_iterators/associated_types/incrementable.traits.cc: New
 121         test.
 122         * testsuite/24_iterators/associated_types/readable.traits.cc: New test.
 123         * testsuite/24_iterators/contiguous/concept.cc: New test.
 124         * testsuite/24_iterators/contiguous/tag.cc: New test.
 125         * testsuite/24_iterators/customization_points/iter_move.cc: New test.
 126         * testsuite/24_iterators/customization_points/iter_swap.cc: New test.
 127         * testsuite/24_iterators/headers/iterator/synopsis_c++20.cc: New test.
 128         * testsuite/24_iterators/range_operations/advance.cc: New test.
 129         * testsuite/24_iterators/range_operations/distance.cc: New test.
 130         * testsuite/24_iterators/range_operations/next.cc: New test.
 131         * testsuite/24_iterators/range_operations/prev.cc: New test.
 132         * testsuite/26_numerics/adjacent_difference/requirements/
 133         explicit_instantiation/2.cc: Rename types that conflict with C++20
 134         concepts.
 135         * testsuite/26_numerics/adjacent_difference/requirements/
 136         explicit_instantiation/pod.cc: Likewise.
 137         * testsuite/26_numerics/partial_sum/requirements/
 138         explicit_instantiation/2.cc: Likewise.
 139         * testsuite/26_numerics/partial_sum/requirements/
 140         explicit_instantiation/pod.cc: Likewise.
 141         * testsuite/experimental/iterator/requirements.cc: Likewise.
 142         * testsuite/std/ranges/access/begin.cc: New test.
 143         * testsuite/std/ranges/access/cbegin.cc: New test.
 144         * testsuite/std/ranges/access/cdata.cc: New test.
 145         * testsuite/std/ranges/access/cend.cc: New test.
 146         * testsuite/std/ranges/access/crbegin.cc: New test.
 147         * testsuite/std/ranges/access/crend.cc: New test.
 148         * testsuite/std/ranges/access/data.cc: New test.
 149         * testsuite/std/ranges/access/empty.cc: New test.
 150         * testsuite/std/ranges/access/end.cc: New test.
 151         * testsuite/std/ranges/access/rbegin.cc: New test.
 152         * testsuite/std/ranges/access/rend.cc: New test.
 153         * testsuite/std/ranges/access/size.cc: New test.
 154         * testsuite/util/testsuite_iterators.h (contiguous_iterator_wrapper)
 155         (test_range, test_sized_range): New test utilities.
 156
 157         * testsuite/util/testsuite_iterators.h (BoundsContainer::size()): Add
 158         new member function.
 159         (WritableObject::operator=): Constrain with enable_if when available.
 160         (remove_cv): Use std::remove_if when available.
 161         (test_container::it(int)): Use size().
 162         (test_container::size()): Use BoundsContainer::size().
 163
 164         PR libstdc++/92267
 165         * include/bits/stl_deque.h (_Deque_iterator(const _Deque_iterator&)):
 166         Do not define as defaulted.
 167         * testsuite/23_containers/deque/types/92267.cc: New test.
 168
 169 2019-10-26  Gerald Pfeifer  <gerald@pfeifer.com>
 170
 171         * doc/xml/manual/codecvt.xml: Switch pubs.opengroup.org to https.
 172         * doc/xml/manual/locale.xml (LC_ALL): Ditto.
 173         * doc/xml/manual/messages.xml: Ditto.
 174
 175 2019-10-26  John David Anglin  <danglin@gcc.gnu.org>
 176
 177         * config/abi/post/hppa-linux-gnu/baseline_symbols.txt: Update.
 178
 179 2019-10-25  Jonathan Wakely  <jwakely@redhat.com>
 180
 181         * testsuite/util/testsuite_iterators.h (output_iterator_wrapper)
 182         (input_iterator_wrapper, forward_iterator_wrapper)
 183         bidirectional_iterator_wrapper, random_access_iterator_wrapper): Remove
 184         user-provided copy constructors and copy assignment operators so they
 185         are defined implicitly.
 186         (input_iterator_wrapper): Initialize members in default constructor.
 187         (forward_iterator_wrapper): Remove assignments to members of base.
 188
 189         * include/bits/allocator.h: Check __cpp_constexpr_dynamic_alloc
 190         before making the std::allocator destructor constexpr.
 191         * testsuite/20_util/allocator/requirements/constexpr.cc: New test.
 192
 193         * include/bits/range_cmp.h: Check __cpp_lib_concepts before defining
 194         concepts. Fix comment.
 195         * include/bits/allocator.h
 196
 197 2019-10-25  Gerald Pfeifer  <gerald@pfeifer.com>
 198
 199         * doc/xml/manual/policy_data_structures_biblio.xml: Switch
 200         pubs.opengroup.org to https.
 201
 202 2019-10-25  Gerald Pfeifer  <gerald@pfeifer.com>
 203
 204         * doc/xml/gnu/gpl-3.0.xml: Switch www.gnu.org to https.
 205
 206 2019-09-09  Edward Smith-Rowland  <3dw4rd@verizon.net>
 207
 208         * doc/xml/manual/status_cxx2020.xml: Add rows and update status.
 209
 210 2019-10-24  Jonathan Wakely  <jwakely@redhat.com>
 211
 212         * include/bits/allocator.h (allocator<void>): Restore the explicit
 213         specialization for C++20, but make its API consistent with the primary
 214         template.
 215         (allocator::~allocator()): Restore the destructor for C++20, but make
 216         it constexpr.
 217         * testsuite/20_util/allocator/rebind_c++20.cc: Check allocator<void>.
 218         * testsuite/20_util/allocator/requirements/typedefs_c++20.cc: Likewise.
 219         * testsuite/20_util/allocator/void.cc: Check that constructors and
 220         destructors are trivial. Check for converting constructor in C++20.
 221         * testsuite/ext/malloc_allocator/variadic_construct.cc: Simplify
 222         dejagnu target selector.
 223         * testsuite/ext/new_allocator/variadic_construct.cc: Likewise.
 224
 225         * include/experimental/executor (__use_future_ct, use_future_t):
 226         Define partial specializations for std::allocator.
 227         (__use_future_ch): Overload constructor for completion tokens using
 228         std::allocator.
 229
 230         PR libstdc++/88338 Implement P0898R3, C++20 concepts library
 231         * doc/xml/manual/status_cxx2020.xml: Update status.
 232         * doc/html/*: Regenerate.
 233         * testsuite/std/concepts/1.cc: New test.
 234         * testsuite/std/concepts/2.cc: New test.
 235
 236         * include/bits/random.h (uniform_random_bit_generator): Define for
 237         C++20.
 238         * testsuite/26_numerics/random/concept.cc: New test.
 239         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error line.
 240
 241 2019-10-23  Jonathan Wakely  <jwakely@redhat.com>
 242
 243         * include/std/functional (invoke): Add constexpr for C++20.
 244         * include/std/version (__cpp_lib_constexpr_invoke): Define.
 245         * testsuite/20_util/function_objects/invoke/constexpr.cc: New test.
 246
 247         PR c++/91369 Implement P0784R7 changes to allocation and construction
 248         * include/bits/alloc_traits.h: Include <bits/stl_construct.h>.
 249         (allocator_traits::_S_allocate, allocator_traits::_S_construct)
 250         (allocator_traits::_S_destroy, allocator_traits::_S_max_size)
 251         (allocator_traits::_S_select, allocator_traits::allocate)
 252         (allocator_traits::deallocate, allocator_traits::construct)
 253         (allocator_traits::destroy, allocator_traits::max_size)
 254         (allocator_traits::select_on_container_copy_construction)
 255         (allocator_traits<allocator<T>>): Add constexpr specifier for C++20.
 256         (allocator_traits<allocator<T>>::construct): Use construct_at.
 257         (allocator_traits<allocator<T>>::destroy): Use destroy_at.
 258         (__alloc_on_copy, __alloc_on_move, __alloc_on_swap): Add constexpr
 259         specifier.
 260         (_Destroy(ForwardIterator, ForwardIterator, Alloc&))
 261         (_Destroy(ForwardIterator, ForwardIterator, allocator<T>&)): Move here
 262         from <bits/stl_construct.h>.
 263         * include/bits/allocator.h (allocator::~allocator): Remove for C++20.
 264         (allocator::allocate, allocate::deallocate): Define for C++20 and up.
 265         (operator==, operator!=): Add constexpr specifier for C++20.
 266         * include/bits/stl_construct.h: Don't include <ext/alloc_traits.h>.
 267         (destroy_at): For C++20 add constexpr specifier and support for
 268         destroying arrays.
 269         (construct_at): Define new function for C++20.
 270         (_Construct): Return result of placement new-expression. For C++11 and
 271         up add constexpr. For C++20 dispatch to std::construct_at during
 272         constant evaluation.
 273         (_Destroy(pointer)): Add constexpr specifier. For C++20 dispatch to
 274         std::destroy_at during constant evaluation.
 275         (_Destroy_aux::__destroy, _Destroy_n_aux::__destroy_n): Add constexpr
 276         specifier for C++20.
 277         (_Destroy(ForwardIterator, ForwardIterator))
 278         (_Destroy(ForwardIterator, Size)): Likewise. Do not elide trivial
 279         destructors during constant evaluation.
 280         (destroy, destroy_n): Add constexpr specifier for C++20.
 281         (_Destroy(ForwardIterator, ForwardIterator, Alloc&))
 282         (_Destroy(ForwardIterator, ForwardIterator, allocator<T>&)): Move to
 283         <bits/alloc_traits.h>, to remove dependency on allocators.
 284         * include/bits/stl_uninitialized.h: Include <ext/alloc_traits.h>.
 285         Include <bits/stl_pair.h> instead of <utility>.
 286         * include/ext/alloc_traits.h: Always include <bits/alloc_traits.h>.
 287         (__alloc_traits::construct, __alloc_traits::destroy)
 288         (__alloc_traits::_S_select_on_copy, __alloc_traits::_S_on_swap): Add
 289         constexpr specifier.
 290         * include/ext/malloc_allocator.h  (operator==, operator!=): Add
 291         constexpr specifier for C++20.
 292         * include/ext/new_allocator.h (operator==, operator!=): Likewise.
 293         * testsuite/20_util/headers/memory/synopsis.cc: Add constexpr.
 294         * testsuite/20_util/scoped_allocator/69293_neg.cc: Ignore additional
 295         errors due to constexpr function called after failed static_assert.
 296         * testsuite/20_util/specialized_algorithms/construct_at/1.cc: New test.
 297         * testsuite/23_containers/vector/cons/destructible_debug_neg.cc:
 298         Ignore additional errors due to constexpr function called after failed
 299         static_assert.
 300         * testsuite/23_containers/vector/cons/destructible_neg.cc: Likewise.
 301
 302         * testsuite/20_util/bind/91371.cc: Fix test to compile as C++11.
 303
 304         * include/debug/helper_functions.h (__valid_range): Change
 305         _GLIBCXX_CONSTEXPR to _GLIBCXX14_CONSTEXPR.
 306
 307         * include/ext/throw_allocator.h (throw_allocator_base): Qualify
 308         size_t and ptrdiff_t.
 309
 310         * include/ext/pb_ds/detail/bin_search_tree_/bin_search_tree_.hpp:
 311         Use detail::rebind_traits.
 312         * include/ext/pb_ds/detail/bin_search_tree_/node_iterators.hpp:
 313         Likewise.
 314         * include/ext/pb_ds/detail/bin_search_tree_/traits.hpp: Likewise.
 315         * include/ext/pb_ds/detail/binary_heap_/binary_heap_.hpp: Likewise.
 316         * include/ext/pb_ds/detail/binary_heap_/entry_cmp.hpp: Likewise.
 317         * include/ext/pb_ds/detail/binary_heap_/entry_pred.hpp: Likewise.
 318         * include/ext/pb_ds/detail/binary_heap_/point_const_iterator.hpp:
 319         Likewise.
 320         * include/ext/pb_ds/detail/binomial_heap_base_/binomial_heap_base_.hpp:
 321         Likewise.
 322         * include/ext/pb_ds/detail/branch_policy/branch_policy.hpp: Likewise.
 323         * include/ext/pb_ds/detail/cc_hash_table_map_/cc_ht_map_.hpp: Likewise.
 324         * include/ext/pb_ds/detail/cond_dealtor.hpp: Likewise.
 325         * include/ext/pb_ds/detail/eq_fn/hash_eq_fn.hpp (has_eq_fn): Likewise.
 326         * include/ext/pb_ds/detail/gp_hash_table_map_/gp_ht_map_.hpp: Likewise.
 327         * include/ext/pb_ds/detail/hash_fn/ranged_hash_fn.hpp: Likewise.
 328         * include/ext/pb_ds/detail/hash_fn/ranged_probe_fn.hpp: Likewise.
 329         * include/ext/pb_ds/detail/left_child_next_sibling_heap_/
 330         left_child_next_sibling_heap_.hpp: Likewise.
 331         * include/ext/pb_ds/detail/left_child_next_sibling_heap_/node.hpp:
 332         Likewise.
 333         * include/ext/pb_ds/detail/left_child_next_sibling_heap_/
 334         point_const_iterator.hpp: Likewise.
 335         * include/ext/pb_ds/detail/list_update_map_/lu_map_.hpp: Likewise.
 336         * include/ext/pb_ds/detail/ov_tree_map_/
 337         constructors_destructor_fn_imps.hpp: Likewise.
 338         * include/ext/pb_ds/detail/ov_tree_map_/node_iterators.hpp: Likewise.
 339         * include/ext/pb_ds/detail/ov_tree_map_/ov_tree_map_.hpp: Likewise.
 340         * include/ext/pb_ds/detail/pairing_heap_/pairing_heap_.hpp: Likewise.
 341         * include/ext/pb_ds/detail/pat_trie_/pat_trie_.hpp: Likewise.
 342         * include/ext/pb_ds/detail/pat_trie_/pat_trie_base.hpp: Likewise.
 343         * include/ext/pb_ds/detail/rb_tree_map_/node.hpp: Likewise.
 344         * include/ext/pb_ds/detail/rc_binomial_heap_/rc.hpp: Likewise.
 345         * include/ext/pb_ds/detail/splay_tree_/node.hpp: Likewise.
 346         * include/ext/pb_ds/detail/thin_heap_/thin_heap_.hpp: Likewise.
 347         * include/ext/pb_ds/detail/trie_policy/sample_trie_access_traits.hpp:
 348         Likewise.
 349         * include/ext/pb_ds/detail/type_utils.hpp: Fix typo in comment.
 350         * include/ext/pb_ds/detail/types_traits.hpp (stored_value): Add
 351         bool parameter to control whether the hash value is stored.
 352         (select_base_type): New class template and partial specialization.
 353         (maybe_null_type): Likewise.
 354         (rebind_traits): New class template.
 355         (type_base): Remove four nearly identical specializations.
 356         (type_dispatch): Remove.
 357         (type_traits): Use select_base_type and maybe_null_type instead of
 358         type_base to control differences between specializations.
 359         * include/ext/pb_ds/list_update_policy.hpp: Use detail::rebind_traits.
 360         * include/ext/pb_ds/priority_queue.hpp: Likewise.
 361         * include/ext/pb_ds/tree_policy.hpp: Likewise.
 362         * include/ext/pb_ds/trie_policy.hpp: Likewise.
 363
 364         * include/backward/hash_set (hash_set): Use __alloc_traits.
 365         * include/backward/hashtable.h (_Hashtable): Likewise.
 366         * include/ext/alloc_traits.h (__alloc_traits::allocate): Add overload
 367         taking a hint.
 368         * include/ext/extptr_allocator.h (_ExtPtr_allocator::allocate): Ignore
 369         hint.
 370         * include/ext/slist (_Slist_base): Use __alloc_traits.
 371         * include/tr1/hashtable.h (_Hashtable): Likewise.
 372         * include/tr1/regex (match_results): Use vector::const_reference
 373         instead of assuming the allocator defines it.
 374         * testsuite/backward/hash_map/23528.cc: Use allocator_traits in C++11.
 375         * testsuite/tr1/6_containers/unordered_map/capacity/29134-map.cc: Use
 376         __gnu_test::max_size.
 377         * testsuite/tr1/6_containers/unordered_multimap/capacity/
 378         29134-multimap.cc: Likewise.
 379         * testsuite/tr1/6_containers/unordered_multiset/capacity/
 380         29134-multiset.cc: Likewise.
 381         * testsuite/tr1/6_containers/unordered_set/capacity/29134-set.cc:
 382         Likewise.
 383
 384 2019-10-22  Jonathan Wakely  <jwakely@redhat.com>
 385
 386         * testsuite/util/testsuite_abi.h: Restore use of tr1/unordered_map
 387         when compiled as C++98.
 388
 389         * include/bits/memoryfwd.h (uses_allocator): Do not declare for C++98.
 390         * testsuite/17_intro/names.cc: Check uses_allocator in C++98.
 391
 392         * include/bits/alloc_traits.h
 393         (allocator_traits<allocator<T>>::allocate): Ignore hint for C++20.
 394         (allocator_traits<allocator<T>>::construct): Perform placement new
 395         directly for C++20, instead of calling allocator<T>::construct.
 396         (allocator_traits<allocator<T>>::destroy): Call destructor directly
 397         for C++20, instead of calling allocator<T>::destroy.
 398         (allocator_traits<allocator<T>>::max_size): Return value directly
 399         for C++20, instead of calling std::allocator<T>::max_size().
 400         (__do_alloc_on_copy, __do_alloc_on_move, __do_alloc_on_swap): Do not
 401         define for C++17 and up.
 402         (__alloc_on_copy, __alloc_on_move, __alloc_on_swap): Use if-constexpr
 403         for C++17 and up, instead of tag dispatching.
 404         * include/bits/allocator.h (allocator<void>): Remove for C++20.
 405         (allocator::pointer, allocator::const_pointer, allocator::reference)
 406         (allocator::const_reference, allocator::rebind): Remove for C++20.
 407         * include/bits/basic_string.h (basic_string): Use __alloc_traits to
 408         rebind allocator.
 409         * include/bits/memoryfwd.h (allocator<void>): Remove for C++20.
 410         * include/ext/debug_allocator.h: Use __alloc_traits for rebinding.
 411         * include/ext/malloc_allocator.h (malloc_allocator::~malloc_allocator)
 412         (malloc_allocator::pointer, malloc_allocator::const_pointer)
 413         (malloc_allocator::reference, malloc_allocator::const_reference)
 414         (malloc_allocator::rebind, malloc_allocator::max_size)
 415         (malloc_allocator::construct, malloc_allocator::destroy): Do not
 416         define for C++20.
 417         (malloc_allocator::_M_max_size): Define new function.
 418         * include/ext/new_allocator.h (new_allocator::~new_allocator)
 419         (new_allocator::pointer, new_allocator::const_pointer)
 420         (new_allocator::reference, new_allocator::const_reference)
 421         (new_allocator::rebind, new_allocator::max_size)
 422         (new_allocator::construct, new_allocator::destroy): Do not
 423         define for C++20.
 424         (new_allocator::_M_max_size): Define new function.
 425         * include/ext/rc_string_base.h (__rc_string_base::_Rep): Use
 426         __alloc_traits to rebind allocator.
 427         * include/ext/rope (_Rope_rep_base, _Rope_base): Likewise.
 428         (rope::rope(CharT, const allocator_type&)): Use __alloc_traits
 429         to construct character.
 430         * include/ext/slist (_Slist_base): Use __alloc_traits to rebind
 431         allocator.
 432         * include/ext/sso_string_base.h (__sso_string_base::_M_max_size):
 433         Use __alloc_traits.
 434         * include/ext/throw_allocator.h (throw_allocator): Do not use optional
 435         members of std::allocator, use __alloc_traits members instead.
 436         * include/ext/vstring.h (__versa_string): Use __alloc_traits.
 437         * include/ext/vstring_util.h (__vstring_utility): Likewise.
 438         * include/std/memory: Include <bits/alloc_traits.h>.
 439         * testsuite/20_util/allocator/8230.cc: Use __gnu_test::max_size.
 440         * testsuite/20_util/allocator/rebind_c++20.cc: New test.
 441         * testsuite/20_util/allocator/requirements/typedefs.cc: Do not check
 442         for pointer, const_pointer, reference, const_reference or rebind in
 443         C++20.
 444         * testsuite/20_util/allocator/requirements/typedefs_c++20.cc: New test.
 445         * testsuite/23_containers/deque/capacity/29134.cc: Use
 446         __gnu_test::max_size.
 447         * testsuite/23_containers/forward_list/capacity/1.cc: Likewise.
 448         * testsuite/23_containers/list/capacity/29134.cc: Likewise.
 449         * testsuite/23_containers/map/capacity/29134.cc: Likewise.
 450         * testsuite/23_containers/multimap/capacity/29134.cc: Likewise.
 451         * testsuite/23_containers/multiset/capacity/29134.cc: Likewise.
 452         * testsuite/23_containers/set/capacity/29134.cc: Likewise.
 453         * testsuite/23_containers/vector/capacity/29134.cc: Likewise.
 454         * testsuite/ext/malloc_allocator/variadic_construct.cc: Do not run
 455         test for C++20.
 456         * testsuite/ext/new_allocator/variadic_construct.cc: Likewise.
 457         * testsuite/ext/vstring/capacity/29134.cc: Use __gnu_test::max_size.
 458         * testsuite/util/replacement_memory_operators.h: Do not assume
 459         Alloc::pointer exists.
 460         * testsuite/util/testsuite_allocator.h (__gnu_test::max_size): Define
 461         helper to call max_size for any allocator.
 462
 463 2019-10-22  Andreas Schwab  <schwab@suse.de>
 464
 465         * config/abi/post/aarch64-linux-gnu/baseline_symbols.txt: Update.
 466
 467 2019-10-18  Jonathan Wakely  <jwakely@redhat.com>
 468
 469         PR libstdc++/92143
 470         * libsupc++/new_opa.cc (operator new) [__APPLE__]: Increase alignment
 471         to at least sizeof(void*).
 472
 473         * include/bits/range_cmp.h (ranges::less::operator()): Inline the
 474         logic from std::less::operator() to remove the dependency on it.
 475
 476 2019-10-17  Jonathan Wakely  <jwakely@redhat.com>
 477
 478         * doc/doxygen/user.cfg.in (INPUT): Add new C++17 and C++20 headers.
 479
 480         * include/Makefile.am: Add new header.
 481         * include/Makefile.in: Regenerate.
 482         * include/bits/range_cmp.h: New header for C++20 function objects.
 483         * include/std/functional: Include new header.
 484         * testsuite/20_util/function_objects/identity/1.cc: New test.
 485         * testsuite/20_util/function_objects/range.cmp/equal_to.cc: New test.
 486         * testsuite/20_util/function_objects/range.cmp/greater.cc: New test.
 487         * testsuite/20_util/function_objects/range.cmp/greater_equal.cc: New
 488         test.
 489         * testsuite/20_util/function_objects/range.cmp/less.cc: New test.
 490         * testsuite/20_util/function_objects/range.cmp/less_equal.cc: New test.
 491         * testsuite/20_util/function_objects/range.cmp/not_equal_to.cc: New
 492         test.
 493
 494         PR libstdc++/92124
 495         * include/bits/forward_list.h
 496         (_M_move_assign(forward_list&&, false_type)): Do not use
 497         __make_move_if_noexcept, instead move unconditionally.
 498         * include/bits/stl_deque.h (_M_move_assign2(deque&&, false_type)):
 499         Likewise.
 500         * include/bits/stl_list.h (_M_move_assign(list&&, false_type)):
 501         Likewise.
 502         * include/bits/stl_vector.h (_M_move_assign(vector&&, false_type)):
 503         Likewise.
 504         * testsuite/23_containers/vector/92124.cc: New test.
 505
 506 2019-10-16  Jonathan Wakely  <jwakely@redhat.com>
 507
 508         * include/bits/c++config (_GLIBCXX_BUILTIN_IS_SAME_AS): Define to
 509         one of __is_same_as or __is_same when available.
 510         * include/std/concepts (__detail::__same_as): Use std::is_same_v.
 511         * include/std/type_traits (is_same) [_GLIBCXX_BUILTIN_IS_SAME_AS]:
 512         Use new macro instead of __is_same_as.
 513         (is_same) [!_GLIBCXX_BUILTIN_IS_SAME_AS]: Restore partial
 514         specialization.
 515         (is_same_v) [_GLIBCXX_BUILTIN_IS_SAME_AS]: Use new macro.
 516         (is_same_v) [!_GLIBCXX_BUILTIN_IS_SAME_AS]: Use std::is_same.
 517
 518 2019-10-16  François Dumont  <fdumont@gcc.gnu.org>
 519
 520         * src/c++11/debug.cc (print_field): Replace constness_names <unknown>
 521         entry with <unknown constness>. Replace state_names <unknown> entry with
 522         <unknown state>.
 523
 524 2019-10-11  Jonathan Wakely  <jwakely@redhat.com>
 525
 526         * include/Makefile.am: Add new header.
 527         * include/Makefile.in: Regenerate.
 528         * include/precompiled/stdc++.h: Include <concepts>.
 529         * include/std/concepts: New header for C++20.
 530         * include/std/version (__cpp_lib_concepts): Define.
 531         * scripts/create_testsuite_files: Look for test files in new std
 532         directory.
 533         * testsuite/libstdc++-dg/conformance.exp: Likewise.
 534         * testsuite/std/concepts/concepts.callable/invocable.cc: New test.
 535         * testsuite/std/concepts/concepts.callable/regular_invocable.cc: New
 536         test.
 537         * testsuite/std/concepts/concepts.callable/relation.cc: New test.
 538         * testsuite/std/concepts/concepts.callable/strictweakorder.cc: New
 539         test.
 540         * testsuite/std/concepts/concepts.lang/concept.arithmetic/
 541         floating_point.cc: New test.
 542         * testsuite/std/concepts/concepts.lang/concept.arithmetic/integral.cc:
 543         New test.
 544         * testsuite/std/concepts/concepts.lang/concept.arithmetic/
 545         signed_integral.cc: New test.
 546         * testsuite/std/concepts/concepts.lang/concept.arithmetic/
 547         unsigned_integral.cc: New test.
 548         * testsuite/std/concepts/concepts.lang/concept.assignable/1.cc: New
 549         test.
 550         * testsuite/std/concepts/concepts.lang/concept.common/1.cc: New test.
 551         * testsuite/std/concepts/concepts.lang/concept.commonref/1.cc: New
 552         test.
 553         * testsuite/std/concepts/concepts.lang/concept.constructible/1.cc:
 554         New test.
 555         * testsuite/std/concepts/concepts.lang/concept.convertible/1.cc:
 556         New test.
 557         * testsuite/std/concepts/concepts.lang/concept.copyconstructible/1.cc:
 558         New test.
 559         * testsuite/std/concepts/concepts.lang/concept.defaultconstructible/
 560         1.cc: New test.
 561         * testsuite/std/concepts/concepts.lang/concept.derived/1.cc:
 562         New test.
 563         * testsuite/std/concepts/concepts.lang/concept.destructible/1.cc:
 564         New test.
 565         * testsuite/std/concepts/concepts.lang/concept.moveconstructible/1.cc:
 566         New test.
 567         * testsuite/std/concepts/concepts.lang/concept.same/1.cc:
 568         New test.
 569         * testsuite/std/concepts/concepts.lang/concept.swappable/swap.cc:
 570         New test.
 571         * testsuite/std/concepts/concepts.lang/concept.swappable/swappable.cc:
 572         New test.
 573         * testsuite/std/concepts/concepts.lang/concept.swappable/
 574         swappable_with.cc: New test.
 575         * testsuite/std/concepts/concepts.object/copyable.cc: New test.
 576         * testsuite/std/concepts/concepts.object/movable.cc: New test.
 577         * testsuite/std/concepts/concepts.object/regular.cc: New test.
 578         * testsuite/std/concepts/concepts.object/semiregular.cc: New test.
 579
 580         * include/std/type_traits (is_same): Replace partial specialization
 581         by using __is_same_as built-in in primary template.
 582         (is_same_v): Use __is_same_as built-in instead of instantiating the
 583         is_same trait.
 584
 585         PR libstdc++/92059
 586         * include/tr2/dynamic_bitset (__dynamic_bitset_base): Define all
 587         special member functions as defaulted. Add noexcept to most members.
 588         (__dynamic_bitset_base(size_t, unsigned long long, const _Alloc&)):
 589         Mask off unwanted bits in the __val parameter. Avoid undefined left
 590         shifts.
 591         (__dynamic_bitset_base::_M_assign): Remove.
 592         (__dynamic_bitset_base::_M_do_reset): Use std::fill.
 593         (__dynamic_bitset_base::_M_are_all_aux): Avoid integer promotion when
 594         block_type has lower rank than int.
 595         (dynamic_bitset): Add noexcept to most members. Use injected-class-name
 596         in return types and parameter types.
 597         (dynamic_bitset::_M_Nb): Add default member initializer.
 598         (dynamic_bitset(), dynamic_bitset(const dynamic_bitset&)): Define as
 599         defaulted.
 600         (dynamic_bitset(dynamic_bitset&&)): Clear source object after move.
 601         (dynamic_bitset::operator=(const dynamic_bitset&)): Define as
 602         defaulted.
 603         (dynamic_bitset::operator=(dynamic_bitset&&)): Add noexcept-specifier.
 604         Define without using swap, to propagate allocator correctly.
 605         (dynamic_bitset(const char*, const _Alloc&)): Use strlen.
 606         (dynamic_bitset::_M_do_sanitize, dynamic_bitset::_M_do_fill): Use
 607         casts to avoid unwanted integer promotions.
 608         (dynamic_bitset::_M_copy_from_ptr): Rearrange template parameters and
 609         add default template arguments and default argument to simplify usage.
 610         (dynamic_bitset::_M_copy_from_string): Adjust call to _M_copy_from_ptr.
 611         (operator==(const dynamic_bitset&, const dynamic_bitset&))
 612         (operator<(const dynamic_bitset&, const dynamic_bitset&)): Use _M_Nb.
 613         * include/tr2/dynamic_bitset.tcc (dynamic_bitset::_M_copy_from_ptr):
 614         Adjust template parameters to match declaration.
 615         * testsuite/tr2/dynamic_bitset/cmp.cc: New test.
 616         * testsuite/tr2/dynamic_bitset/cons.cc: New test.
 617         * testsuite/tr2/dynamic_bitset/copy.cc: New test.
 618         * testsuite/tr2/dynamic_bitset/move.cc: New test.
 619         * testsuite/tr2/dynamic_bitset/pr92059.cc: New test.
 620
 621         * include/bits/charconv.h (__to_chars_len): Avoid -Wsign-compare
 622         warnings.
 623
 624 2019-10-10  Jonathan Wakely  <jwakely@redhat.com>
 625
 626         PR libstdc++/91057
 627         * src/c++98/locale.cc [_GLIBCXX_LONG_DOUBLE_COMPAT]
 628         (find_ldbl_sync_facet): Fix parameter type and missing return.
 629
 630 2019-10-09  Marek Polacek  <polacek@redhat.com>
 631
 632         PR c++/91364 - P0388R4: Permit conversions to arrays of unknown bound.
 633         PR c++/69531 - DR 1307: Differently bounded array parameters.
 634         PR c++/88128 - DR 330: Qual convs and pointers to arrays of pointers.
 635         * testsuite/23_containers/span/lwg3255.cc: Adjust test to match the
 636         post-P0388R4 behavior.
 637
 638 2019-10-09  Jonathan Wakely  <jwakely@redhat.com>
 639
 640         PR libstdc++/91057
 641         * src/c++98/locale.cc (locale::id::_M_id()) [__GTHREADS]: Use atomic
 642         compare-exchange or double-checked lock to ensure only one thread sets
 643         the _M_index variable.
 644         [_GLIBCXX_LONG_DOUBLE_COMPAT]: Call find_ldbl_sync_facet to detect
 645         facets that share another facet's ID.
 646         [_GLIBCXX_LONG_DOUBLE_COMPAT] (find_ldbl_sync_facet): New function.
 647
 648         PR libstdc++/78552
 649         * src/c++98/locale_init.cc (locale::classic()): Do not construct a new
 650         locale object for every call.
 651         (locale::_S_initialize_once()): Construct C locale here.
 652
 653 2019-10-08  Jonathan Wakely  <jwakely@redhat.com>
 654
 655         * doc/Makefile.am (doc-html-docbook-regenerate): New target.
 656         (${docbook_outdir}/html): Do not create unused 'html/ext' directory.
 657         * doc/Makefile.in: Regenerate.
 658         * doc/xml/manual/documentation_hacking.xml: Document new target.
 659         * doc/html/*: Regenerate.
 660
 661         * doc/xml/manual/allocator.xml: Use archived copy of CUJ article.
 662         * doc/html/*: Regenerate.
 663
 664 2019-10-06  François Dumont  <fdumont@gcc.gnu.org>
 665
 666         * include/bits/stl_algo.h
 667         (__copy_n_a(_IIte, _Size, _OIte)): New.
 668         (__copy_n_a(istreambuf_iterator<>, _Size, _CharT*)): New declaration.
 669         (__copy_n(_IIte, _Size, _OIte, input_iterator_tag)): Adapt to use
 670         latter.
 671         * include/bits/streambuf_iterator.h (istreambuf_iterator<>): Declare
 672         std::__copy_n_a friend.
 673         (__copy_n_a(istreambuf_iterator<>, _Size, _CharT*)): New.
 674         * testsuite/25_algorithms/copy_n/istreambuf_iterator/1.cc: New.
 675         * testsuite/25_algorithms/copy_n/istreambuf_iterator/1_neg.cc: New.
 676         * testsuite/25_algorithms/copy_n/istreambuf_iterator/2_neg.cc: New.
 677
 678         * include/bits/stl_iterator_base_types.h (__iterator_category_t): Define
 679         for C++11.
 680         (_RequireInputIte): Likewise and use __enable_if_t.
 681         * include/std/numeric
 682         (__is_random_access_iter): Use __iterator_category_t.
 683
 684         * include/bits/stl_algo.h (copy_n): Add __glibcxx_requires_can_increment
 685         debug checks.
 686         * testsuite/25_algorithms/copy_n/debug/1_neg.cc: New.
 687         * testsuite/25_algorithms/copy_n/debug/2_neg.cc: New.
 688
 689 2019-10-04  François Dumont  <fdumont@gcc.gnu.org>
 690
 691         * include/debug/forward_list
 692         (_Sequence_traits<__debug::forward_list<>>::_S_size): Returns __dp_sign
 693         distance when not empty.
 694         * include/debug/list (_Sequence_traits<__debug::list<>>::_S_size):
 695         Likewise.
 696         * include/debug/helper_functions.h (__dp_sign_max_size): New
 697         _Distance_precision enum entry.
 698         (__valid_range_aux(_IIte, _IIte, _Distance_traits<>::__type,
 699         __false_type)): Adapt.
 700         * include/debug/safe_iterator.tcc
 701         (_Safe_iterator<>::_M_get_distance_to(const _Safe_iterator&)): Review
 702         distance computation.
 703
 704 2019-10-04  Jonathan Wakely  <jwakely@redhat.com>
 705
 706         PR libstdc++/81091
 707         PR libstdc++/91947
 708         * configure.ac: Use AC_SYS_LARGEFILE to enable 64-bit file APIs.
 709         * config.h.in: Regenerate:
 710         * configure: Regenerate:
 711         * include/Makefile.am (${host_builddir}/largefile-config.h): New
 712         target to generate config header for filesystem library.
 713         (${host_builddir}/c++config.h): Rename macros for large file support.
 714         * include/Makefile.in: Regenerate.
 715         * src/c++17/fs_dir.cc: Include new config header.
 716         * src/c++17/fs_ops.cc: Likewise.
 717         (filesystem::file_size): Use uintmax_t for size.
 718         * src/filesystem/dir.cc: Include new config header.
 719         * src/filesystem/ops.cc: Likewise.
 720         (experimental::filesystem::file_size): Use uintmax_t for size.
 721
 722         * testsuite/util/testsuite_abi.h: Use std::unordered_map instead of
 723         std::tr1::unordered_map.
 724         * testsuite/util/testsuite_allocator.h: Likewise.
 725
 726         * include/tr1/hashtable.h: Add header for __gnu_cxx::__alloc_traits.
 727
 728         * include/tr1/hashtable.h (tr1::_Hashtable::_M_allocate_node): Use
 729         __gnu_cxx::__alloc_traits for allocator construct function.
 730         (tr1::_Hashtable::_M_deallocate_node): Likewise for destroy function.
 731
 732         * include/precompiled/stdc++.h: Include <span> for C++20.
 733         * testsuite/17_intro/names.cc: Do not define 'e' for C++20.
 734
 735 2019-10-03  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
 736
 737         * include/parallel/multiway_merge.h (_RAIter3): Replace _C by _Cp.
 738
 739 2019-10-02  Jonathan Wakely  <jwakely@redhat.com>
 740
 741         * config/abi/pre/gnu.ver: Tighten up greedy wildcards.
 742
 743         * doc/xml/manual/parallel_mode.xml: Add caveat about support for
 744         recent standards.
 745         * doc/html/*: Regenerate.
 746
 747 2019-10-01  Jonathan Wakely  <jwakely@redhat.com>
 748
 749         * include/experimental/algorithm (experimental::sample): Qualify call
 750         to __sample correctly.
 751         * include/parallel/algo.h (sample, for_each_n): Add using-declarations
 752         for algorithms that don't have parallel implementations.
 753
 754         * include/parallel/algobase.h (equal, lexicographical_compare): Add
 755         _GLIBCXX20_CONSTEXPR and dispatch to sequential algorithm when being
 756         constant evaluated.
 757         * include/parallel/algorithmfwd.h (equal, lexicographical_compare):
 758         Add _GLIBCXX20_CONSTEXPR.
 759
 760         * testsuite/17_intro/using_namespace_std_tr1_neg.cc: Skip test for
 761         parallel mode.
 762         * testsuite/20_util/hash/84998.cc: Likewise.
 763         * testsuite/23_containers/deque/types/pmr_typedefs_debug.cc: Likewise.
 764         * testsuite/23_containers/forward_list/pmr_typedefs_debug.cc: Likewise.
 765         * testsuite/23_containers/list/pmr_typedefs_debug.cc: Likewise.
 766         * testsuite/23_containers/map/pmr_typedefs_debug.cc: Likewise.
 767         * testsuite/23_containers/multimap/pmr_typedefs_debug.cc: Likewise.
 768         * testsuite/23_containers/multiset/pmr_typedefs_debug.cc: Likewise.
 769         * testsuite/23_containers/set/pmr_typedefs_debug.cc: Likewise.
 770         * testsuite/23_containers/unordered_map/pmr_typedefs_debug.cc:
 771         Likewise.
 772         * testsuite/23_containers/unordered_multimap/pmr_typedefs_debug.cc:
 773         Likewise.
 774         * testsuite/23_containers/unordered_multiset/pmr_typedefs_debug.cc:
 775         Likewise.
 776         * testsuite/23_containers/unordered_set/pmr_typedefs_debug.cc:
 777         Likewise.
 778         * testsuite/23_containers/vector/cons/destructible_debug_neg.cc:
 779         Likewise.
 780         * testsuite/23_containers/vector/types/pmr_typedefs_debug.cc: Likewise.
 781         * testsuite/25_algorithms/binary_search/partitioned.cc: Likewise.
 782         * testsuite/25_algorithms/copy/86658.cc: Likewise.
 783         * testsuite/25_algorithms/equal_range/partitioned.cc: Likewise.
 784         * testsuite/25_algorithms/lexicographical_compare/71545.cc: Likewise.
 785         * testsuite/25_algorithms/lower_bound/partitioned.cc: Likewise.
 786         * testsuite/25_algorithms/upper_bound/partitioned.cc: Likewise.
 787
 788         * include/parallel/algo.h: Replace non-reserved names.
 789         * include/parallel/multiway_merge.h: Likewise.
 790         * include/parallel/multiway_mergesort.h: Likewise.
 791         * include/parallel/numericfwd.h: Likewise.
 792         * testsuite/17_intro/names.cc: Add RAI to test macros.
 793
 794 2019-09-30  François Dumont  <fdumont@gcc.gnu.org>
 795
 796         * include/debug/array: Add C++20 constexpr to comparison operators.
 797         * testsuite/23_containers/array/tuple_interface/get_debug_neg.cc: Adapt
 798         dg-error line numbers.
 799         * testsuite/23_containers/array/tuple_interface/
 800         tuple_element_debug_neg.cc: Likewise.
 801
 802 2019-09-30  Andreas Tobler  <andreast@gcc.gnu.org>
 803
 804         * include/experimental/internet: Include netinet/in.h if we have
 805         _GLIBCXX_HAVE_NETINET_IN_H defined.
 806
 807         * testsuite/ext/special_functions/airy_ai/check_nan.cc: Ignore the
 808         FreeBSD warning about lower advertised precision of tgammal.
 809         * testsuite/ext/special_functions/airy_bi/check_nan.cc: Likewise.
 810         * testsuite/special_functions/07_cyl_bessel_i/check_nan.cc: Likewise.
 811         * testsuite/special_functions/08_cyl_bessel_j/check_nan.cc: Likewise.
 812         * testsuite/special_functions/09_cyl_bessel_k/check_nan.cc: Likewise.
 813         * testsuite/special_functions/10_cyl_neumann/check_nan.cc: Likewise.
 814         * testsuite/special_functions/19_sph_bessel/check_nan.cc: Likewise.
 815         * testsuite/special_functions/21_sph_neumann/check_nan.cc: Likewise.
 816         * testsuite/tr1/5_numerical_facilities/special_functions/
 817         08_cyl_bessel_i/check_nan.cc: Likewise.
 818         * testsuite/tr1/5_numerical_facilities/special_functions/
 819         09_cyl_bessel_j/check_nan.cc: Likewise.
 820         * testuite/tr1/5_numerical_facilities/special_functions/
 821         10_cyl_bessel_k/check_nan.cc: Likewise.
 822         * testsuite/tr1/5_numerical_facilities/special_functions/
 823         11_cyl_neumann/check_nan.cc: Likewise.
 824         * testsuite/tr1/5_numerical_facilities/special_functions/
 825         21_sph_bessel/check_nan.cc: Likewise.
 826         * testsuite/tr1/5_numerical_facilities/special_functions/
 827         23_sph_neumann/check_nan.cc: Likewise.
 828
 829 2019-09-30  Jonathan Wakely  <jwakely@redhat.com>
 830
 831         * include/std/span (span(element_type(&)[N]))
 832         (span(array<value_type, N>&), span(const array<value_type, N>&)):
 833         Deduce array element type to allow safe const conversions (LWG 3255).
 834         [!_GLIBCXX_P1394] (span(Container&), span(const Container&)): Use
 835         remove_cv_t on arguments to __is_std_span and __is_std_array.
 836         * testsuite/23_containers/span/lwg3255.cc: New test.
 837
 838         PR libstdc++/77936
 839         * include/parallel/checkers.h (__is_sorted): Remove unused variable.
 840
 841 2019-09-28  François Dumont  <fdumont@gcc.gnu.org>
 842
 843         * include/bits/stl_algo.h (merge): Fix documentation.
 844         * include/debug/functions.h (__check_sorted_aux): Add C++20 constexpr.
 845         (__check_sorted): Likewise and remove nested irreflexive check.
 846         (__check_sorted_set_aux, __check_sorted_set): Add C++20 constexpr.
 847         (__check_partitioned_lower, __check_partitioned_upper): Likewise.
 848         (_Irreflexive_checker::_S_is_valid): Likewise.
 849         (__is_irreflexive, __is_irreflexive_pred): Likewise.
 850         * include/debug/helper_functions.h (__get_distance): Add constexpr.
 851         (__valid_range_aux): Add C++20 constexpr.
 852         (__valid_range(_Iter, _Iter, _Distance_traits<_Iter>::__type&)):
 853         Likewise and add std::is_constant_evaluated check.
 854         (__valid_range_aux(_Iter, _Iter, std::input_iterator_tag)): New.
 855         (__valid_range_aux(_Iter, _Iter, std::random_accss_iterator_tag)): New.
 856         (__valid_range_aux(_Integral, _Integral, std::__true_type)): New,
 857         use latter.
 858         (__valid_range(_Iter, _Iter)): Adapt to use latter, add constexpr and
 859         __builtin_is_contant_evaludated check..
 860         (__can_advance, __base): Add constexpr.
 861         * include/debug/macros.h [_GLIBCXX_HAVE_BUILTIN_IS_CONSTANT_EVALUATED]
 862         (_GLIBCXX_DEBUG_VERIFY_COND_AT): New.
 863         (__glibcxx_check_sorted): Use __glibcxx_check_irreflexive.
 864         (__glibcxx_check_sorted_pred): Use __glibcxx_check_irreflexive_pred.
 865         * testsuite/25_algorithms/binary_search/constexpr.cc: Use irreflexive
 866         std::less.
 867         * testsuite/25_algorithms/is_sorted/constexpr.cc: Likewise.
 868         * testsuite/25_algorithms/merge/constexpr.cc: Fix order in camm. Fix
 869         lambda to be irreflexive.
 870
 871 2019-09-27  Maciej W. Rozycki  <macro@wdc.com>
 872
 873         * configure: Regenerate.
 874
 875 2019-09-27  Jonathan Wakely  <jwakely@redhat.com>
 876
 877         PR libstdc++/91910
 878         * src/c++11/debug.cc (_Safe_iterator_base::_M_detach()): Load pointer
 879         atomically and lock the mutex before accessing the sequence.
 880         (_Safe_local_iterator_base::_M_detach()): Likewise.
 881         (_Safe_iterator_base::_M_reset()): Clear _M_sequence atomically.
 882
 883 2019-09-26  Jonathan Wakely  <jwakely@redhat.com>
 884
 885         * include/debug/array (to_array): Define for debug mode.
 886
 887         * include/bits/stl_pair.h (pair): Add _GLIBCXX20_CONSTEXPR to
 888         piecewise construction constructor, assignment operators, and swap.
 889         * include/std/tuple (pair::pair(piecewise_construct_t, tuple, tuple)):
 890         Add _GLIBCXX20_CONSTEXPR.
 891         (pair::pair(tuple, tuple, _Index_tuple, _Index_tuple)): Likewise.
 892         * testsuite/20_util/pair/constexpr_assign.cc: New test.
 893         * testsuite/20_util/pair/constexpr_swap.cc: New test.
 894
 895         * include/experimental/internet (operator==, operator<): Fix loop
 896         condition to avoid reading past the end of the array.
 897
 898         * include/std/array: Remove references to profile mode.
 899         * include/std/bitset: Likewise.
 900         * include/std/deque: Likewise.
 901         * include/std/forward_list: Likewise.
 902         * include/std/list: Likewise.
 903         * include/std/map: Likewise.
 904         * include/std/set: Likewise.
 905         * include/std/unordered_map: Likewise.
 906         * include/std/unordered_set: Likewise.
 907         * include/std/vector: Likewise.
 908         * testsuite/17_intro/headers/c++1998/profile_mode.cc: New test.
 909         * testsuite/17_intro/headers/c++2011/profile_mode.cc: New test.
 910
 911 2019-09-25  Jonathan Wakely  <jwakely@redhat.com>
 912
 913         * include/bits/regex.h
 914         (basic_regex::assign(const C*, size_t, flag_type)): Add default
 915         argument (LWG 3296).
 916         * testsuite/28_regex/basic_regex/assign/char/lwg3296.cc: New test.
 917         * testsuite/28_regex/basic_regex/assign/wchar_t/lwg3296.cc: New test.
 918
 919 2019-09-24  Jonathan Wakely  <jwakely@redhat.com>
 920
 921         * include/std/variant (variant::index()): Remove impossible case.
 922
 923         PR libstdc++/91871
 924         * testsuite/util/testsuite_hooks.h
 925         (conversion::iterator_to_const_iterator()): Do not return an invalid
 926         iterator. Test direct-initialization and direct-list-initialization
 927         as well as implicit conversion.
 928
 929 2019-09-23  Jonathan Wakely  <jwakely@redhat.com>
 930
 931         PR libstdc++/91788 (partial)
 932         * include/std/variant (variant::index()): Improve codegen for cases
 933         where conversion to size_t already works correctly.
 934
 935 2019-09-23  Andreas Schwab  <schwab@suse.de>
 936
 937         * config/abi/post/riscv64-linux-gnu/baseline_symbols.txt: Update.
 938
 939 2019-09-12  Jonathan Wakely  <jwakely@redhat.com>
 940
 941         PR libstdc++/91748
 942         * include/bits/stl_algo.h (for_each_n): Fix random access iterator
 943         case.
 944         * testsuite/25_algorithms/for_each/for_each_n.cc: Test with random
 945         access iterators.
 946
 947 2019-09-11  Jonathan Wakely  <jwakely@redhat.com>
 948
 949         * python/libstdcxx/v6/xmethods.py (SharedPtrUseCountWorker.__call__):
 950         Fix syntax error.
 951
 952         * testsuite/20_util/result_of/sfinae_friendly_1.cc: Add -Wno-volatile
 953         for C++2a and up. Define HAS_52748_FIXED and fix incorrect tests.
 954         * testsuite/tr1/3_function_objects/result_of.cc: Add -Wno-volatile
 955         for C++2a and up.
 956
 957 2019-09-10  Jonathan Wakely  <jwakely@redhat.com>
 958
 959         * include/std/type_traits (__do_common_type_impl): Implement
 960         additional COND-RES(CREF(D1), CRED(D2)) condition for C++20.
 961         (basic_common_reference, common_reference, common_reference_t): Define
 962         for C++20.
 963         * testsuite/20_util/common_reference/requirements/alias_decl.cc: New
 964         test.
 965         * testsuite/20_util/common_reference/requirements/
 966         explicit_instantiation.cc: New test.
 967         * testsuite/20_util/common_reference/requirements/typedefs.cc: New
 968         test.
 969
 970         * include/std/charconv (to_chars): Rename to __to_chars_i. Define
 971         non-template overloads for each signed and unsigned integer type and
 972         char. Define deleted overload for bool (LWG 3266).
 973         * testsuite/20_util/to_chars/1_neg.cc: Remove.
 974         * testsuite/20_util/to_chars/3.cc: New test.
 975         * testsuite/20_util/to_chars/lwg3266.cc: New test.
 976
 977 2019-09-10  Christophe Lyon  <christophe.lyon@st.com>
 978
 979         * acinclude.m4: Handle uclinux*.
 980         * configure: Regenerate.
 981         * configure.host: Handle uclinux*
 982
 983 2019-09-10  Christophe Lyon  <christophe.lyon@st.com>
 984         Mickaël Guêné <mickael.guene@st.com>
 985
 986         * libsupc++/eh_personality.cc (get_ttype_entry): Add FDPIC
 987         support.
 988
 989 2019-09-10  Jonathan Wakely  <jwakely@redhat.com>
 990
 991         PR libstdc++/91711
 992         * testsuite/23_containers/span/get_neg.cc: Avoid ambiguity due to
 993         0ul being a valid null pointer constant.
 994
 995         * include/std/type_traits (__remove_cv_t): New alias template.
 996         (is_void, is_integral, is_floating_point, is_pointer)
 997         (is_member_object_pointer, is_member_function_pointer, is_null_pointer)
 998         (is_member_point), __is_signed_integer, __is_unsigned_integer)
 999         (__make_unsigned_selector, __make_signed_selector, remove_pointer)
1000         (__decay_selector): Use __remove_cv_t.
1001         (remove_cv): Add partial specializations for cv-qualified types.
1002         (__decay_t): New alias template.
1003         (__decay_and_strip, __common_type_impl, __result_of_impl): Use
1004         __decay_t.
1005         (__enable_if_t): Move earlier in the file.
1006         (_Require): Use __enable_if_t.
1007         (swap(T&, T&)): Use _Require.
1008         (swap(T(&)[N])): Use __enable_if_t.
1009
1010 2019-09-09  Edward Smith-Rowland  <3dw4rd@verizon.net>
1011
1012         Implement C++20 p1424 - 'constexpr' feature macro concerns,
1013         Issue 3256 - Feature testing macro for constexpr algorithms,
1014         and Issue 3257 - Missing feature testing macro update from P0858.
1015         * include/std/version (__cpp_lib_constexpr_algorithms): Bump value.
1016         * include/bits/algorithmfwd.h: Ditto.
1017         * include/std/utility: Ditto.
1018         * testsuite/25_algorithms/constexpr_macro.cc: Ditto.
1019         * testsuite/25_algorithms/cpp_lib_constexpr.cc: New check for
1020         __cpp_lib_constexpr macro in <algorith>.
1021         * testsuite/20_util/exchange/constexpr.cc: Add check for
1022         __cpp_lib_constexpr macro in <utility>.
1023         * testsuite/25_algorithms/adjacent_find/constexpr.cc: Remove check for
1024         __cpp_lib_constexpr_algorithms.
1025         * testsuite/25_algorithms/all_of/constexpr.cc: Ditto.
1026         * testsuite/25_algorithms/any_of/constexpr.cc: Ditto.
1027         * testsuite/25_algorithms/binary_search/constexpr.cc: Ditto.
1028         * testsuite/25_algorithms/copy/constexpr.cc: Ditto.
1029         * testsuite/25_algorithms/copy_backward/constexpr.cc: Ditto.
1030         * testsuite/25_algorithms/copy_if/constexpr.cc: Ditto.
1031         * testsuite/25_algorithms/copy_n/constexpr.cc: Ditto.
1032         * testsuite/25_algorithms/count/constexpr.cc: Ditto.
1033         * testsuite/25_algorithms/count_if/constexpr.cc: Ditto.
1034         * testsuite/25_algorithms/equal/constexpr.cc: Ditto.
1035         * testsuite/25_algorithms/equal_range/constexpr.cc: Ditto.
1036         * testsuite/25_algorithms/fill/constexpr.cc: Ditto.
1037         * testsuite/25_algorithms/fill_n/constexpr.cc: Ditto.
1038         * testsuite/25_algorithms/find/constexpr.cc: Ditto.
1039         * testsuite/25_algorithms/find_end/constexpr.cc: Ditto.
1040         * testsuite/25_algorithms/find_first_of/constexpr.cc: Ditto.
1041         * testsuite/25_algorithms/find_if/constexpr.cc: Ditto.
1042         * testsuite/25_algorithms/find_if_not/constexpr.cc: Ditto.
1043         * testsuite/25_algorithms/for_each/constexpr.cc: Ditto.
1044         * testsuite/25_algorithms/generate/constexpr.cc: Ditto.
1045         * testsuite/25_algorithms/generate_n/constexpr.cc: Ditto.
1046         * testsuite/25_algorithms/is_heap/constexpr.cc: Ditto.
1047         * testsuite/25_algorithms/is_heap_until/constexpr.cc: Ditto.
1048         * testsuite/25_algorithms/is_partitioned/constexpr.cc: Ditto.
1049         * testsuite/25_algorithms/is_permutation/constexpr.cc: Ditto.
1050         * testsuite/25_algorithms/is_sorted/constexpr.cc: Ditto.
1051         * testsuite/25_algorithms/is_sorted_until/constexpr.cc: Ditto.
1052         * testsuite/25_algorithms/lexicographical_compare/constexpr.cc: Ditto.
1053         * testsuite/25_algorithms/lower_bound/constexpr.cc: Ditto.
1054         * testsuite/25_algorithms/merge/constexpr.cc: Ditto.
1055         * testsuite/25_algorithms/mismatch/constexpr.cc: Ditto.
1056         * testsuite/25_algorithms/none_of/constexpr.cc: Ditto.
1057         * testsuite/25_algorithms/partition_copy/constexpr.cc: Ditto.
1058         * testsuite/25_algorithms/partition_point/constexpr.cc: Ditto.
1059         * testsuite/25_algorithms/remove/constexpr.cc: Ditto.
1060         * testsuite/25_algorithms/remove_copy/constexpr.cc: Ditto.
1061         * testsuite/25_algorithms/remove_copy_if/constexpr.cc: Ditto.
1062         * testsuite/25_algorithms/remove_if/constexpr.cc: Ditto.
1063         * testsuite/25_algorithms/replace_copy/constexpr.cc: Ditto.
1064         * testsuite/25_algorithms/replace_copy_if/constexpr.cc: Ditto.
1065         * testsuite/25_algorithms/replace_if/constexpr.cc: Ditto.
1066         * testsuite/25_algorithms/reverse_copy/constexpr.cc: Ditto.
1067         * testsuite/25_algorithms/rotate_copy/constexpr.cc: Ditto.
1068         * testsuite/25_algorithms/search/constexpr.cc: Ditto.
1069         * testsuite/25_algorithms/search_n/constexpr.cc: Ditto.
1070         * testsuite/25_algorithms/set_difference/constexpr.cc: Ditto.
1071         * testsuite/25_algorithms/set_intersection/constexpr.cc: Ditto.
1072         * testsuite/25_algorithms/set_symmetric_difference/constexpr.cc: Ditto.
1073         * testsuite/25_algorithms/set_union/constexpr.cc: Ditto.
1074         * testsuite/25_algorithms/transform/constexpr.cc: Ditto.
1075         * testsuite/25_algorithms/unique/constexpr.cc: Ditto.
1076         * testsuite/25_algorithms/unique_copy/constexpr.cc: Ditto.
1077         * testsuite/25_algorithms/upper_bound/constexpr.cc: Ditto.
1078
1079 2019-09-09  Edward Smith-Rowland  <3dw4rd@verizon.net>
1080
1081         Update docs for recent <span> and constexpr lib changes.
1082         * doc/xml/manual/status_cxx2020.xml: Update p0202r3, p0858r0, p0879r0,
1083         p1023r0, p1085r2 status.
1084         * doc/html/manual/status.html: Regenerate.
1085
1086 2019-09-09  Antony Polukhin  <antoshkka@gmail.com>
1087
1088         * include/bits/charconv.h (__detail::__to_chars_10_impl): Replace
1089         final offsets with constants.
1090
1091 2019-09-09  Jonathan Wakely  <jwakely@redhat.com>
1092
1093         * include/bits/range_access.h (__adl_to_address): Remove.
1094         * include/std/span (__is_base_derived_safe_convertible_v): Replace
1095         with span::__is_compatible.
1096         (__is_std_array_v): Replace with __is_std_array class template and
1097         partial specializations.
1098         (__is_std_array, __is_std_span): New class templates and partial
1099         specializations.
1100         (span::__is_compatible): New alias template for SFINAE constraints.
1101         (span::span(element_type (&)[N])): Remove redundant constraints. Do
1102         not use __adl_data to obtain a pointer.
1103         (span::span(array<value_type, N>&)): Likewise.
1104         (span::span(const array<value_type, N>&)): Likewise.
1105         [_GLIBCXX_P1394] (span::iter_reference_t, span::iterator_t)
1106         (span::iter_value_t, span::derived_from): New alias templates for
1107         SFINAE constraints, until the equivalents are supported in <concepts>
1108         and <iterator>.
1109         [_GLIBCXX_P1394] (span::__is_compatible_iterator): New alias template
1110         for SFINAE constraints.
1111         [_GLIBCXX_P1394] (span::is_compatible_range): New class template for
1112         SFINAE constraints.
1113         [_GLIBCXX_P1394] (span::span(Range&&)): Improve constraints.
1114         [_GLIBCXX_P1394] (span::span(ContiguousIterator, Sentinel)): Likewise.
1115         Use std::to_address instead of __adl_to_address.
1116         [_GLIBCXX_P1394] (span::span(ContiguousIterator, size_type)): Likewise.
1117         [!_GLIBCXX_P1394] (span::__is_compatible_container): New alias
1118         template for SFINAE constraints.
1119         [!_GLIBCXX_P1394] (span::span(Container&))
1120         (span::span(const Container&)): Improve constraints.
1121         [!_GLIBCXX_P1394] (span::span(pointer, size_type))
1122         (span::span(pointer, pointer)): Remove redundant cast of pointer.
1123         (span(const span<OType, OExtent>&)): New constructor.
1124
1125 2019-09-06  Jonathan Wakely  <jwakely@redhat.com>
1126
1127         * include/bits/range_access.h (ssize): Define for C++20.
1128         * testsuite/24_iterators/range_access_cpp20.cc: New test.
1129         * doc/xml/manual/status_cxx2020.xml: Update P1227R2 status.
1130         * doc/html/*: Regenerate.
1131
1132 2019-09-06  Florian Weimer  <fweimer@redhat.com>
1133
1134         * configure: Regenerate.
1135
1136 2019-09-05  Jonathan Wakely  <jwakely@redhat.com>
1137
1138         * doc/xml/manual/status_cxx2020.xml: Update status for P0122R7 and
1139         P1024R3. Remove entry for P0920R2.
1140         * include/std/span  (__cpp_lib_span): Change value.
1141         (__extent_storage, __extent_storage<dynamic_extent>): Remove default
1142         constructor.
1143         (span): Replace __extent_storage base class with data member.
1144         (span::_S_subspan_extent): New function.
1145         (span::empty()): Add nodiscard attribute.
1146         (span::front, span::back, span::operator[]): Check preconditions.
1147         (span::first, span::last, span::subspan): Add noexcept. Improve
1148         precondition checks (LWG 3103).
1149         (get): Remove redundant condition from static_assert.
1150         (tuple_element<I, span<T, E>>): Fix static_assert message and simplify.
1151         (as_writable_bytes): Add inline specifier.
1152         * include/std/version (__cpp_lib_span): Change value.
1153         * testsuite/23_containers/span/back_neg.cc: Remove stray semi-colon.
1154         * testsuite/23_containers/span/front_neg.cc: Likewise.
1155         * testsuite/23_containers/span/index_op_neg.cc: Likewise.
1156         * testsuite/23_containers/span/last_neg.cc: Improve test.
1157         * testsuite/23_containers/span/subspan_neg.cc: Likewise.
1158         * testsuite/23_containers/span/1.cc: New test.
1159         * testsuite/23_containers/span/2.cc: New test.
1160         * testsuite/23_containers/span/back_assert_neg.cc: New test.
1161         * testsuite/23_containers/span/first_2_assert_neg.cc: New test.
1162         * testsuite/23_containers/span/first_assert_neg.cc: New test.
1163         * testsuite/23_containers/span/first_neg.cc: New test.
1164         * testsuite/23_containers/span/front_assert_neg.cc: New test.
1165         * testsuite/23_containers/span/index_op_assert_neg.cc: New test.
1166         * testsuite/23_containers/span/last_2_assert_neg.cc: New test.
1167         * testsuite/23_containers/span/last_assert_neg.cc: New test.
1168         * testsuite/23_containers/span/subspan_2_assert_neg.cc: New test.
1169         * testsuite/23_containers/span/subspan_3_assert_neg.cc: New test.
1170         * testsuite/23_containers/span/subspan_4_assert_neg.cc: New test.
1171         * testsuite/23_containers/span/subspan_5_assert_neg.cc: New test.
1172         * testsuite/23_containers/span/subspan_6_assert_neg.cc: New test.
1173         * testsuite/23_containers/span/subspan_assert_neg.cc: New test.
1174
1175 2019-09-05  JeanHeyd Meneide  <phdofthehouse@gmail.com>
1176
1177         * include/Makefile.am: Add <span> header.
1178         * include/Makefile.in: Regenerate.
1179         * include/bits/range_access.h (__adl_begin, __adl_end, __adl_cbegin)
1180         (__adl_cend, __adl_rbegin, __adl_rend, __adl_crbegin, __adl_crend)
1181         (__adl_data, __adl_cdata, __adl_size, __adl_empty, __adl_to_address):
1182         New functions for performing argument-dependent lookup of range
1183         customization points.
1184         * include/bits/stl_iterator.h (__normal_iterator): Add
1185         _GLIBCXX20_CONSTEXPR to all functions.
1186         * include/std/span: New header.
1187         * include/std/version (__cpp_lib_span): Define feature test macro.
1188         * testsuite/23_containers/span/contiguous_range_neg.cc: New test.
1189         * testsuite/23_containers/span/everything.cc: New test.
1190         * testsuite/23_containers/span/get_neg.cc: New test.
1191         * testsuite/23_containers/span/last_neg.cc: New test.
1192         * testsuite/23_containers/span/subspan_neg.cc: New test.
1193         * testsuite/23_containers/span/tuple_element_dynamic_neg.cc: New test.
1194         * testsuite/23_containers/span/tuple_element_oob_neg.cc: New test.
1195         * testsuite/23_containers/span/tuple_size_neg.cc: New test.
1196
1197 2019-09-05  Jonathan Wakely  <jwakely@redhat.com>
1198
1199         * doc/xml/manual/allocator.xml: Remove URL for bibliography entry.
1200         * doc/html/*: Regenerate.
1201
1202 2019-09-04  Mike Crowe  <mac@mcrowe.com>
1203
1204         PR libstdc++/41861
1205         * acinclude.m4 (GLIBCXX_CHECK_PTHREAD_COND_CLOCKWAIT): Check for new
1206         pthread_cond_clockwait function.
1207         * configure.ac: Use GLIBCXX_CHECK_PTHREAD_COND_CLOCKWAIT.
1208         * configure: Regenerate.
1209         * config.h.in: Regenerate.
1210         * include/std/condition_variable: (condition_variable): Rename
1211         __steady_clock_t typedef and add system_clock. Change __clock_t to be
1212         a typedef for the preferred clock to convert arbitrary other clocks to.
1213         [_GLIBCXX_USE_PTHREAD_COND_CLOCKWAIT] (wait_until): Add a steady_clock
1214         overload.
1215         (wait_until): Change __clock_t overload to use system_clock.
1216         [_GLIBCXX_USE_PTHREAD_COND_CLOCKWAIT] (__wait_until_impl): Add
1217         steady_clock overload that calls pthread_cond_clockwait.
1218         (__wait_until_impl): Change __clock_t overload to use system_clock.
1219         (condition_variable_any) [_GLIBCXX_USE_PTHREAD_COND_CLOCKWAIT]: Use
1220         steady_clock for __clock_t if pthread_cond_clockwait is available.
1221
1222 2019-09-04  Mike Crowe  <mac@mcrowe.com>
1223
1224         * testsuite/30_threads/condition_variable/members/2.cc (test01):
1225         Parameterise so that test can be run against an arbitrary clock.
1226         (main): Test using std::chrono::steady_clock and a user-defined
1227         clock in addition to the previous std::chrono::system_clock.
1228         * testsuite/30_threads/condition_variable_any/members/2.cc: Likewise.
1229
1230 2019-09-03  Ulrich Weigand  <uweigand@de.ibm.com>
1231
1232         * crossconfig.m4: Remove references to spu.
1233         * configure: Regenerate.
1234         * doc/xml/manual/appendix_contributing.xml: Remove references
1235         to __ea as "badword" for spu.
1236         * doc/html/manual/source_code_style.html: Regenerate.
1237         * include/tr1/ell_integral.tcc (__ellint_rd): Do not attempt
1238         to avoid __ea (as "badword" for spu).
1239         (__ellint_rj): Likewise.
1240
1241 2019-09-03  Chung-Lin Tang  <cltang@codesourcery.com>
1242
1243         PR other/79543
1244         * acinclude.m4 (GLIBCXX_CHECK_LINKER_FEATURES): Fix GNU ld --version
1245         scanning to conform to the GNU Coding Standards.
1246         * configure: Regenerate.
1247
1248 2019-09-02  Jonathan Wakely  <jwakely@redhat.com>
1249
1250         * src/c++17/memory_resource.cc: Use __constinit keyword.
1251
1252 2019-09-02  Jonathan Wakely  <jwakely@redhat.com>
1253
1254         * doc/xml/manual/abi.xml: Document 9.x library versions.
1255         * doc/html/*: Regenerate.
1256
1257 2019-09-02  Jonathan Wakely  <jwakely@redhat.com>
1258
1259         * include/std/charconv (__detail::__to_chars_2_len): Use std::log2p1.
1260         (__detail::__to_chars_8_len): Remove.
1261         (__detail::__to_chars_8): Inline length calculation here.
1262         (__detail::__from_chars_binary): Use numeric_limits instead of
1263         CHAR_BIT.
1264
1265 2019-09-02  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
1266
1267         * config/abi/post/i386-solaris/baseline_symbols.txt: Regenerate.
1268         * config/abi/post/i386-solaris/amd64/baseline_symbols.txt: Likewise.
1269         * config/abi/post/sparc-solaris/baseline_symbols.txt: Likewise.
1270         * config/abi/post/sparc-solaris/sparcv9/baseline_symbols.txt:
1271         Likewise.
1272
1273 2019-09-01  François Dumont  <fdumont@gcc.gnu.org>
1274
1275         * testsuite_files/util/testsuite_performance.h
1276         (resource_counter::start): Ignore unused malloc(0) result.
1277
1278 2019-09-01  Gerald Pfeifer  <gerald@pfeifer.com>
1279
1280         * doc/xml/manual/policy_data_structures_biblio.xml (COM: Component
1281         Model Object Technologies): Adjust name and link.
1282
1283 2019-08-30  Antony Polukhin  <antoshkka@gmail.com>
1284
1285         * include/std/charconv (__detail::__to_chars_8)
1286         __detail::__to_chars_16): Replace array of precomputed digits with
1287         arithmetic operations to avoid CPU cache misses. Remove zero
1288         termination from array of digits to allow symbol merge with generic
1289         implementation of __detail::__to_chars. Replace final offsets with
1290         constants. Use __detail::__to_chars_len_2 instead of a generic
1291         __detail::__to_chars_len.
1292         (__detail::__to_chars): Remove zero termination from array of digits.
1293         (__detail::__to_chars_2): Leading digit is always '1'.
1294
1295 2019-08-30  Jonathan Wakely  <jwakely@redhat.com>
1296
1297         * testsuite/23_containers/vector/cons/89164_c++17.cc: Fix errors.
1298
1299 2019-08-30  Uros Bizjak  <ubizjak@gmail.com>
1300
1301         * config/abi/post/alpha-linux-gnu/baseline_symbols.txt: Update.
1302
1303 2019-08-30  Jonathan Wakely  <jwakely@redhat.com>
1304
1305         PR libstdc++/89164
1306         * include/bits/stl_algobase.h (__copy_move): Give descriptive names
1307         to template parameters.
1308         * include/bits/stl_uninitialized.h (uninitialized_copy)
1309         (uninitialized_fill, uninitialized_fill_n): Add static assertions to
1310         diagnose invalid uses.
1311         * testsuite/20_util/specialized_algorithms/uninitialized_copy/1.cc:
1312         Adjust expected error.
1313         * testsuite/20_util/specialized_algorithms/uninitialized_copy/89164.cc:
1314         New test.
1315         * testsuite/20_util/specialized_algorithms/uninitialized_copy_n/
1316         89164.cc: New test.
1317         * testsuite/20_util/specialized_algorithms/uninitialized_fill/89164.cc:
1318         New test.
1319         * testsuite/20_util/specialized_algorithms/uninitialized_fill_n/
1320         89164.cc: New test.
1321         * testsuite/23_containers/vector/cons/89164.cc: New test.
1322         * testsuite/23_containers/vector/cons/89164_c++17.cc: New test.
1323
1324 2019-08-29  Jonathan Wakely  <jwakely@redhat.com>
1325
1326         PR libstdc++/91067
1327         * acinclude.m4 (libtool_VERSION): Bump to 6:28:0.
1328         * configure: Regenerate.
1329         * config/abi/pre/gnu.ver (GLIBCXX_3.4.28): Add new version. Export
1330         missing symbols.
1331         * testsuite/27_io/filesystem/iterators/91067.cc: Test move
1332         constructors.
1333         * testsuite/util/testsuite_abi.cc: Add new symbol version.
1334
1335 2019-08-29  Jakub Jelinek  <jakub@redhat.com>
1336
1337         * config/abi/post/aarch64-linux-gnu/baseline_symbols.txt: Update.
1338         * config/abi/post/s390x-linux-gnu/baseline_symbols.txt: Update.
1339
1340 2019-08-28  Jonathan Wakely  <jwakely@redhat.com>
1341
1342         * config/abi/post/i386-linux-gnu/baseline_symbols.txt: Update.
1343         * config/abi/post/i486-linux-gnu/baseline_symbols.txt: Update.
1344         * config/abi/post/powerpc-linux-gnu/baseline_symbols.txt: Update.
1345         * config/abi/post/powerpc64-linux-gnu/32/baseline_symbols.txt: Update.
1346         * config/abi/post/powerpc64-linux-gnu/baseline_symbols.txt: Update.
1347         * config/abi/post/x86_64-linux-gnu/32/baseline_symbols.txt: Update.
1348         * config/abi/post/x86_64-linux-gnu/baseline_symbols.txt: Update.
1349
1350 2019-08-23  Joseph Myers  <joseph@codesourcery.com>
1351
1352         * src/filesystem/ops-common.h [_GLIBCXX_FILESYSTEM_IS_WINDOWS]
1353         (std::filesystem::__gnu_posix::lstat): Add return type.
1354
1355 2019-08-20  Jonathan Wakely  <jwakely@redhat.com>
1356
1357         * doc/doxygen/user.cfg.in (INPUT): Remove profile mode headers.
1358
1359         * include/std/numeric (reduce): Fix Doxygen markup.
1360
1361         PR libstdc++/91371
1362         * include/std/type_traits (is_function): Simplify definition. Remove
1363         partial specializations for function types.
1364         (__is_referenceable): Simplify definition.
1365         * testsuite/20_util/bind/91371.cc: New test.
1366         * testsuite/20_util/is_function/91371.cc: New test.
1367         * testsuite/20_util/is_function/value.cc: Check more pointer types.
1368         * testsuite/20_util/is_member_function_pointer/91371.cc: New test.
1369         * testsuite/20_util/is_object/91371.cc: New test.
1370
1371 2019-08-16  Uros Bizjak  <ubizjak@gmail.com>
1372
1373         * config/abi/post/alpha-linux-gnu/baseline_symbols.txt: Update.
1374
1375 2019-08-15  Jonathan Wakely  <jwakely@redhat.com>
1376
1377         PR libstdc++/91456
1378         * include/bits/std_function.h (__check_func_return_type): Remove.
1379         (function::_Callable): Use std::__is_invocable_impl instead of
1380         __check_func_return_type.
1381         * include/std/type_traits (__is_invocable_impl): Add another defaulted
1382         template parameter. Define a separate partial specialization for
1383         INVOKE and INVOKE<void>. For INVOKE<R> replace is_convertible check
1384         with a check that models delayed temporary materialization.
1385         * testsuite/20_util/function/91456.cc: New test.
1386         * testsuite/20_util/is_invocable/91456.cc: New test.
1387
1388 2019-08-14  Jonathan Wakely  <jwakely@redhat.com>
1389
1390         * include/std/type_traits (__is_nullptr_t): Add deprecated attribute.
1391
1392 2019-08-14  Edward Smith-Rowland  <3dw4rd@verizon.net>
1393
1394         Implement C++20 p0879 - Constexpr for swap and swap related functions.
1395         * include/std/version (__cpp_lib_constexpr_swap_algorithms): New macro.
1396         * include/bits/algorithmfwd.h (__cpp_lib_constexpr_swap_algorithms):
1397         New macro.
1398         (iter_swap, make_heap, next_permutation, partial_sort_copy, pop_heap)
1399         (prev_permutation, push_heap, reverse, rotate, sort_heap, swap)
1400         (swap_ranges, nth_element, partial_sort, sort): Add constexpr.
1401         * include/bits/move.h (swap): Add constexpr.
1402         * include/bits/stl_algo.h (__move_median_to_first, __reverse, reverse)
1403         (__gcd, __rotate, rotate, __partition, __heap_select)
1404         (__partial_sort_copy, partial_sort_copy, __unguarded_partition)
1405         (__unguarded_partition_pivot, __partial_sort, __introsort_loop, __sort)
1406         (__introselect, __chunk_insertion_sort, next_permutation)
1407         (prev_permutation, partition, partial_sort, nth_element, sort)
1408         (__iter_swap::iter_swap, iter_swap, swap_ranges): Add constexpr.
1409         * include/bits/stl_algobase.h (__iter_swap::iter_swap, iter_swap)
1410         (swap_ranges): Add constexpr.
1411         * include/bits/stl_heap.h (__push_heap, push_heap, __adjust_heap,
1412         __pop_heap, pop_heap, __make_heap, make_heap, __sort_heap, sort_heap):
1413         Add constexpr.
1414         * include/std/type_traits (swap): Add constexpr.
1415         * testsuite/25_algorithms/headers/algorithm/synopsis.cc: Add constexpr.
1416         * testsuite/25_algorithms/iter_swap/constexpr.cc: New test.
1417         * testsuite/25_algorithms/make_heap/constexpr.cc: New test.
1418         * testsuite/25_algorithms/next_permutation/constexpr.cc: New test.
1419         * testsuite/25_algorithms/nth_element/constexpr.cc: New test.
1420         * testsuite/25_algorithms/partial_sort/constexpr.cc: New test.
1421         * testsuite/25_algorithms/partial_sort_copy/constexpr.cc: New test.
1422         * testsuite/25_algorithms/partition/constexpr.cc: New test.
1423         * testsuite/25_algorithms/pop_heap/constexpr.cc: New test.
1424         * testsuite/25_algorithms/prev_permutation/constexpr.cc: New test.
1425         * testsuite/25_algorithms/push_heap/constexpr.cc: New test.
1426         * testsuite/25_algorithms/reverse/constexpr.cc: New test.
1427         * testsuite/25_algorithms/rotate/constexpr.cc: New test.
1428         * testsuite/25_algorithms/sort/constexpr.cc: New test.
1429         * testsuite/25_algorithms/sort_heap/constexpr.cc: New test.
1430         * testsuite/25_algorithms/swap/constexpr.cc: New test.
1431         * testsuite/25_algorithms/swap_ranges/constexpr.cc: New test.
1432
1433 2019-08-12  Jonathan Wakely  <jwakely@redhat.com>
1434
1435         PR libstdc++/90361
1436         * src/c++17/string-inst.cc: Use _GLIBCXX_USE_CXX11_ABI=1 by default.
1437
1438         * include/std/tuple (__unpack_std_tuple): New variable template and
1439         partial specializations.
1440         (apply, make_from_tuple): Add noexcept-specifier.
1441         * testsuite/20_util/tuple/apply/2.cc: New test.
1442         * testsuite/20_util/tuple/make_from_tuple/2.cc: New test.
1443
1444 2019-08-09  Corentin Gay  <gay@adacore.com>
1445
1446         * testsuite/ext/random/beta_distribution/operators/serialize.cc,
1447         testsuite/ext/random/hypergeometric_distribution/operators/serialize.cc,
1448         testsuite/ext/random/normal_mv_distribution/operators/serialize.cc,
1449         testsuite/ext/random/triangular_distribution/operators/serialize.cc,
1450         testsuite/ext/random/von_mises_distribution/operators/serialize.cc:
1451         Add call to `VERIFY`.
1452
1453 2019-08-09  Alexandre Oliva <oliva@adacore.com>
1454
1455         * include/ext/random
1456         (normal_mv_distribution::param_type::param_type): New private
1457         ctor taking a decomposed varcov matrix, for use by...
1458         (operator>>): ... this, befriended.
1459         * include/ext/random.tcc (operator>>): Use it.
1460         (normal_mv_distribution::param_type::_M_init_lower): Adjust
1461         member function name in exception message.
1462
1463 2019-08-08  Jonathan Wakely  <jwakely@redhat.com>
1464
1465         P0325R4 to_array from LFTS with updates
1466         * include/experimental/array (to_array): Qualify call to __to_array.
1467         * include/std/array (__cpp_lib_to_array, to_array): Define for C++20.
1468         * include/std/version (__cpp_lib_to_array): Likewise.
1469         * testsuite/23_containers/array/creation/1.cc: New test.
1470         * testsuite/23_containers/array/creation/2.cc: New test.
1471         * testsuite/23_containers/array/creation/3_neg.cc: New test.
1472         * testsuite/23_containers/array/tuple_interface/tuple_element_neg.cc:
1473         Use zero for dg-error line number.
1474
1475 2019-08-06  Jonathan Wakely  <jwakely@redhat.com>
1476
1477         P1651R0 bind_front should not unwrap reference_wrapper
1478         * include/std/functional (bind_front): Don't unwrap reference_wrapper.
1479         * include/std/version (__cpp_lib_bind_front): Update value.
1480         * testsuite/20_util/function_objects/bind_front/1.cc: Fix test for
1481         feature test macro.
1482         * testsuite/20_util/function_objects/bind_front/2.cc: New test.
1483
1484         * include/std/numbers [!__STRICT_ANSI__ && _GLIBCXX_USE_FLOAT128]
1485         (e_v, log2e_v, log10e_v, pi_v, inv_pi_v, inv_sqrtpi_v, ln2_v, ln10_v)
1486         (sqrt2_v, sqrt3_v, inv_sqrt3, egamma_v, phi_v): Add explicit
1487         specializations for __float128.
1488         * testsuite/26_numerics/numbers/float128.cc: New test.
1489
1490 2019-08-04  Gerald Pfeifer  <gerald@pfeifer.com>
1491
1492         * doc/xml/manual/documentation_hacking.xml: doxygen.org is now
1493         doxygen.nl.
1494
1495 2019-08-01  Edward Smith-Rowland  <3dw4rd@verizon.net>
1496
1497         Implement C++20 p0202 - Add Constexpr Modifiers to Functions
1498         in <algorithm> and <utility> Headers.
1499         Implement C++20 p1023 - constexpr comparison operators for std::array.
1500         * include/bits/algorithmfwd.h (all_of, any_of, binary_search, copy,
1501         copy_backward, copy_if, copy_n, equal_range, fill, find_end,
1502         find_if_not, includes, is_heap, is_heap_until, is_partitioned,
1503         is_permutation, is_sorted, is_sorted_until, iter_swap, lower_bound,
1504         none_of, partition_copy, partition_point, remove, remove_if,
1505         remove_copy, remove_copy_if, replace_copy, replace_copy_if,
1506         reverse_copy, rotate_copy, uunique, upper_bound, adjacent_find, count,
1507         count_if, equal, find, find_first_of, find_if, for_each, generate,
1508         generate_n, lexicographical_compare, merge, mismatch, replace,
1509         replace_if, search, search_n, set_difference, set_intersection,
1510         set_symmetric_difference, set_union, transform, unique_copy):
1511         Mark constexpr.
1512         * include/bits/cpp_type_traits.h (__miter_base): Mark constexpr.
1513         * include/bits/predefined_ops.h (_Iter_less_val::operator(),
1514         _Val_less_iter::operator(), _Iter_equal_to_iter::operator(),
1515         _Iter_equal_to_val::operator(), _Iter_equals_val::operator()):
1516          Use const ref instead of ref arg;
1517         (_Iter_less_val, __iter_less_val, _Val_less_iter, __val_less_iter,
1518         __iter_equal_to_iter, __iter_equal_to_val, __iter_comp_val,
1519         _Iter_comp_val, _Val_comp_iter, __val_comp_iter, __iter_equals_val,
1520         _Iter_equals_iter, __iter_comp_iter, _Iter_pred, __pred_iter,
1521         _Iter_comp_to_val, __iter_comp_val, _Iter_comp_to_iter,
1522         __iter_comp_iter): Mark constexpr.
1523         * include/bits/stl_algo.h (__find_if, __find_if_not, __find_if_not_n,
1524         __search, __search_n_aux, __search_n, __find_end, find_end, all_of,
1525         none_of, any_of, find_if_not, is_partitioned, partition_point,
1526         __remove_copy_if, remove_copy, remove_copy_if, copy_if, __copy_n,
1527         copy_n, partition_copy, __remove_if, remove, remove_if, __adjacent_find,
1528         __unique, unique, __unique_copy, reverse_copy, rotate_copy,
1529         __unguarded_linear_insert, __insertion_sort, __unguarded_insertion_sort,
1530         __final_insertion_sort, lower_bound, __upper_bound, upper_bound,
1531         __equal_range, equal_range, binary_search, __includes, includes,
1532         __next_permutation, __prev_permutation, __replace_copy_if, replace_copy,
1533         replace_copy_if, __count_if, is_sorted, __is_sorted_until,
1534         is_sorted_until, __is_permutation, is_permutation, for_each, find,
1535         find_if, find_first_of, adjacent_find, count, count_if, search,
1536         search_n, transform, replace, replace_if, generate, generate_n,
1537         unique_copy, __merge, merge, __set_union, set_union, __set_intersection,
1538         set_intersection, __set_difference, set_difference,
1539         __set_symmetric_difference, set_symmetric_difference):  Mark constexpr.
1540         * include/bits/stl_algobase.h (__memmove, __memcmp): New maybe constexpr
1541         wrappers around __builtin_memmove and __builtin_memcmp
1542         respectively;
1543         (__niter_base, __niter_wrap, __copy_m, __copy_move_a, __copy_move_a2,
1544         copy, move, __copy_move_b, __copy_move_backward_a,
1545         __copy_move_backward_a2, copy_backward, move_backward, __fill_a, fill,
1546         __fill_n_a, fill_n, equal, __lc_rai::__newlast1, __lc_rai::__cnd2,
1547         __lexicographical_compare_impl, __lexicographical_compare,
1548         __lexicographical_compare<true>::__lc, __lexicographical_compare_aux,
1549         __lower_bound, lower_bound, equal, __equal4, lexicographical_compare,
1550         __mismatch, mismatch, __is_heap_until, __is_heap, is_heap_until,
1551         is_heap): Mark constexpr.
1552         * include/bits/stl_heap.h (__is_heap_until, __is_heap, is_heap_until,
1553         is_heap): Mark constexpr.
1554         * include/bits/stl_iterator.h (__niter_base, __miter_base): Mark constexpr.
1555         * include/std/array: Make comparison ops constexpr.
1556         * include/std/utility: Make exchange constexpr.
1557         * include/std/version (__cpp_lib_constexpr_algorithms): New macro.
1558         * testsuite/23_containers/array/tuple_interface/get_neg.cc: Adjust.
1559         * testsuite/23_containers/array/tuple_interface/
1560         tuple_element_neg.cc: Adjust.
1561         * testsuite/20_util/exchange/constexpr.cc: New.
1562         * testsuite/23_containers/array/comparison_operators/constexpr.cc: New.
1563         * testsuite/25_algorithms/constexpr_macro.cc: New.
1564         * testsuite/25_algorithms/adjacent_find/constexpr.cc: New.
1565         * testsuite/25_algorithms/all_of/constexpr.cc: New.
1566         * testsuite/25_algorithms/any_of/constexpr.cc: New.
1567         * testsuite/25_algorithms/binary_search/constexpr.cc: New.
1568         * testsuite/25_algorithms/copy/constexpr.cc: New.
1569         * testsuite/25_algorithms/copy_backward/constexpr.cc: New.
1570         * testsuite/25_algorithms/copy_if/constexpr.cc: New.
1571         * testsuite/25_algorithms/copy_n/constexpr.cc: New.
1572         * testsuite/25_algorithms/count/constexpr.cc: New.
1573         * testsuite/25_algorithms/count_if/constexpr.cc: New.
1574         * testsuite/25_algorithms/equal/constexpr.cc: New.
1575         * testsuite/25_algorithms/equal_range/constexpr.cc: New.
1576         * testsuite/25_algorithms/fill/constexpr.cc: New.
1577         * testsuite/25_algorithms/fill_n/constexpr.cc: New.
1578         * testsuite/25_algorithms/find/constexpr.cc: New.
1579         * testsuite/25_algorithms/find_end/constexpr.cc: New.
1580         * testsuite/25_algorithms/find_first_of/constexpr.cc: New.
1581         * testsuite/25_algorithms/find_if/constexpr.cc: New.
1582         * testsuite/25_algorithms/find_if_not/constexpr.cc: New.
1583         * testsuite/25_algorithms/for_each/constexpr.cc: New.
1584         * testsuite/25_algorithms/generate/constexpr.cc: New.
1585         * testsuite/25_algorithms/generate_n/constexpr.cc: New.
1586         * testsuite/25_algorithms/is_heap/constexpr.cc: New.
1587         * testsuite/25_algorithms/is_heap_until/constexpr.cc: New.
1588         * testsuite/25_algorithms/is_partitioned/constexpr.cc: New.
1589         * testsuite/25_algorithms/is_permutation/constexpr.cc: New.
1590         * testsuite/25_algorithms/is_sorted/constexpr.cc: New.
1591         * testsuite/25_algorithms/is_sorted_until/constexpr.cc: New.
1592         * testsuite/25_algorithms/lexicographical_compare/constexpr.cc: New.
1593         * testsuite/25_algorithms/lower_bound/constexpr.cc: New.
1594         * testsuite/25_algorithms/merge/constexpr.cc: New.
1595         * testsuite/25_algorithms/mismatch/constexpr.cc: New.
1596         * testsuite/25_algorithms/none_of/constexpr.cc: New.
1597         * testsuite/25_algorithms/partition_copy/constexpr.cc: New.
1598         * testsuite/25_algorithms/partition_point/constexpr.cc: New.
1599         * testsuite/25_algorithms/remove/constexpr.cc: New.
1600         * testsuite/25_algorithms/remove_copy/constexpr.cc: New.
1601         * testsuite/25_algorithms/remove_copy_if/constexpr.cc: New.
1602         * testsuite/25_algorithms/remove_if/constexpr.cc: New.
1603         * testsuite/25_algorithms/replace_copy/constexpr.cc: New.
1604         * testsuite/25_algorithms/replace_copy_if/constexpr.cc: New.
1605         * testsuite/25_algorithms/replace_if/constexpr.cc: New.
1606         * testsuite/25_algorithms/reverse_copy/constexpr.cc: New.
1607         * testsuite/25_algorithms/rotate_copy/constexpr.cc: New.
1608         * testsuite/25_algorithms/search/constexpr.cc: New.
1609         * testsuite/25_algorithms/search_n/constexpr.cc: New.
1610         * testsuite/25_algorithms/set_difference/constexpr.cc: New.
1611         * testsuite/25_algorithms/set_intersection/constexpr.cc: New.
1612         * testsuite/25_algorithms/set_symmetric_difference/constexpr.cc: New.
1613         * testsuite/25_algorithms/set_union/constexpr.cc: New.
1614         * testsuite/25_algorithms/transform/constexpr.cc: New.
1615         * testsuite/25_algorithms/unique/constexpr.cc: New.
1616         * testsuite/25_algorithms/unique_copy/constexpr.cc: New.
1617         * testsuite/25_algorithms/upper_bound/constexpr.cc: New.
1618
1619 2019-07-31  Jonathan Wakely  <jwakely@redhat.com>
1620
1621         * include/std/memory (make_obj_using_allocator): Qualify call to
1622         uses_allocator_construction_args.
1623
1624         P0631R4 Math Constants
1625         * include/Makefile.am: Add new header.
1626         * include/Makefile.in: Regenerate.
1627         * include/precompiled/stdc++.h: Include new header.
1628         * include/std/numbers: New header.
1629         * include/std/version (__cpp_lib_math_constants): Define.
1630         * testsuite/26_numerics/numbers/1.cc: New test.
1631         * testsuite/26_numerics/numbers/2.cc: New test.
1632         * testsuite/26_numerics/numbers/3.cc: New test.
1633         * testsuite/26_numerics/numbers/nonfloat_neg.cc: New test.
1634
1635         * include/std/bit: Add Doxygen comments.
1636
1637         PR libstdc++/91308
1638         * include/bits/unique_ptr.h (unique_ptr::__safe_conversion_up): Remove
1639         constraints on deleter that should only apply to the constructor.
1640         (unique_ptr<T[], D>::__safe_conversion_up): Likewise.
1641         (unique_ptr<T[], D>::unique_ptr(unique_ptr<U, D>&&)): Restore
1642         constraints on deleter here.
1643         * testsuite/20_util/unique_ptr/assign/91308.cc: New test.
1644
1645 2019-07-29  Jonathan Wakely  <jwakely@redhat.com>
1646
1647         PR libstdc++/51333
1648         * libsupc++/cxxabi.h (__gnu_cxx::recursive_init_error): Do not define
1649         constructor inline.
1650         * libsupc++/guard_error.cc (__gnu_cxx::recursive_init_error): Define
1651         constructor.
1652         * testsuite/18_support/51333.cc: New test.
1653
1654 2019-07-28  Gerald Pfeifer  <gerald@pfeifer.com>
1655
1656         * doc/xml/manual/documentation_hacking.xml: Fix broken reference
1657         to the Doxygen manual. Avoid a "here" link on the way.
1658         Fix another broken link to Doxygen docblocks.
1659
1660 2019-07-26  Jonathan Wakely  <jwakely@redhat.com>
1661
1662         * include/std/bit (__cpp_lib_endian): Define.
1663         * include/std/version (__cpp_lib_endian): Define.
1664         * testsuite/26_numerics/endian/2.cc: New.
1665         * testsuite/26_numerics/endian/3.cc: New.
1666         * testsuite/26_numerics/endian/4.cc: New.
1667
1668 2019-07-26  François Dumont  <fdumont@gcc.gnu.org>
1669
1670         * testsuite/util/testsuite_iterators.h
1671         (bidirectional_iterator_wrapper): Fix type comment.
1672         (random_access_iterator_wrapper): Likewise.
1673
1674 2019-07-25  Jonathan Wakely  <jwakely@redhat.com>
1675
1676         * include/std/bit (endian): Move definition here as per P1612R1.
1677         * include/std/type_traits (endian): Remove definition from here.
1678         * testsuite/20_util/endian/1.cc: Rename to ...
1679         * testsuite/26_numerics/endian/1.cc: ... here. Adjust header.
1680
1681 2019-07-25  Martin Liska  <mliska@suse.cz>
1682             Dominik Infuhr  <dominik.infuehr@theobroma-systems.com>
1683
1684         PR c++/23383
1685         * testsuite/ext/bitmap_allocator/check_delete.cc: Add
1686         -fno-allocation-dce.
1687         * testsuite/ext/bitmap_allocator/check_new.cc: Likewise.
1688         * testsuite/ext/new_allocator/check_delete.cc: Likewise.
1689         * testsuite/ext/new_allocator/check_new.cc: Likewise.
1690
1691 2019-07-22  Jonathan Wakely  <jwakely@redhat.com>
1692
1693         * testsuite/26_numerics/bit/bitops.count/*: Rename to ...
1694         * testsuite/26_numerics/bit/bit.count/*: Here.
1695
1696         * include/std/bit (__rotl, __rotr): Change second parameter from
1697         unsigned int to int and handle negative values.
1698         (rotl, rotr): Remove check for __STRICT_ANSI__. Change second
1699         parameter from unsigned int to int. Add nodiscard attribute.
1700         * testsuite/26_numerics/bit/bitops.rot/rotl.cc: Rename to ...
1701         * testsuite/26_numerics/bit/bit.rotate/rotl.cc: Here. Test negative
1702         shifts.
1703         * testsuite/26_numerics/bit/bitops.rot/rotr.cc: Rename to ...
1704         * testsuite/26_numerics/bit/bit.rotate/rotr.cc: Here. Test negative
1705         shifts.
1706
1707         * include/std/bit (__ceil2): Make unrepresentable results undefined,
1708         as per P1355R2. Add debug assertion. Perform one left shift, not two,
1709         so that out of range values cause undefined behaviour. Ensure that
1710         shift will still be undefined if left operand is promoted.
1711         * testsuite/26_numerics/bit/bit.pow.two/ceil2.cc: Replace checks for
1712         unrepresentable values with checks that they are not core constant
1713         expressions.
1714         * testsuite/26_numerics/bit/bit.pow.two/ceil2_neg.cc: New test.
1715
1716 2019-07-19  François Dumont  <fdumont@gcc.gnu.org>
1717
1718         * include/bits/stl_tempbuf.h (__detail::__return_temporary_buffer): Fix
1719         sized deallocation size computation.
1720
1721 2019-07-19  Andreas Schwab  <schwab@linux-m68k.org>
1722
1723         * config/abi/post/m68k-linux-gnu/baseline_symbols.txt: Update.
1724
1725 2019-07-18  François Dumont  <fdumont@gcc.gnu.org>
1726
1727         * include/bits/stl_tempbuf.h (__detail::__return_temporary_buffer): New.
1728         (~_Temporary_buffer()): Use latter.
1729         (_Temporary_buffer(_FIterator, size_type)): Likewise.
1730
1731 2019-07-17  Andreas Schwab  <schwab@suse.de>
1732
1733         * config/abi/post/ia64-linux-gnu/baseline_symbols.txt: Update.
1734
1735 2019-07-16  Jason Merrill  <jason@redhat.com>
1736
1737         * include/std/memory (uses_allocator_construction_args): Add parens
1738         around constraint.
1739
1740 2019-07-12  Jonathan Wakely  <jwakely@redhat.com>
1741
1742         * testsuite/29_atomics/atomic_float/1.cc: Fix comment.
1743
1744         * include/experimental/string_view (__detail::__idt): Remove.
1745         (operator==, operator!=, operator<, operator>, operator<=, operator>=):
1746         Use __type_identity_t instead of __detail::__idt;
1747         * include/std/string_view (__detail::__idt): Remove.
1748         (operator==, operator!=, operator<, operator>, operator<=, operator>=):
1749         Use __type_identity_t instead of __detail::__idt;
1750         * include/std/type_traits (__type_identity_t): New alias template.
1751
1752         * doc/xml/manual/status_cxx2020.xml: Update status for atomic_ref
1753         and floating point atomics.
1754
1755 2019-07-11  Jonathan Wakely  <jwakely@redhat.com>
1756
1757         * doc/xml/manual/configure.xml: Improve documentation of
1758         --enable-libstdcxx-time option.
1759
1760         * include/bits/atomic_base.h (__atomic_impl): New namespace for
1761         wrappers around atomic built-ins.
1762         (__atomic_float, __atomic_ref): New class templates for use as base
1763         classes.
1764         * include/std/atomic (atomic<float>, atomic<double>)
1765         (atomic<long double>): New explicit specializations.
1766         (atomic_ref): New class template.
1767         (__cpp_lib_atomic_ref): Define.
1768         * include/std/version (__cpp_lib_atomic_ref): Define.
1769         * testsuite/29_atomics/atomic/60695.cc: Adjust dg-error.
1770         * testsuite/29_atomics/atomic_float/1.cc: New test.
1771         * testsuite/29_atomics/atomic_float/requirements.cc: New test.
1772         * testsuite/29_atomics/atomic_ref/deduction.cc: New test.
1773         * testsuite/29_atomics/atomic_ref/float.cc: New test.
1774         * testsuite/29_atomics/atomic_ref/generic.cc: New test.
1775         * testsuite/29_atomics/atomic_ref/integral.cc: New test.
1776         * testsuite/29_atomics/atomic_ref/pointer.cc: New test.
1777         * testsuite/29_atomics/atomic_ref/requirements.cc: New test.
1778
1779 2019-07-06  Jonathan Wakely  <jwakely@redhat.com>
1780
1781         * include/ext/atomicity.h (__exchange_and_add, __atomic_add): Replace
1782         throw() with _GLIBCXX_NOTHROW.
1783         (__atomic_add_dispatch): Return after performing atomic increment.
1784
1785 2019-07-05  Jonathan Wakely  <jwakely@redhat.com>
1786
1787         * include/ext/atomicity.h [_GLIBCXX_ATOMIC_BUILTINS] (__atomic_add)
1788         (__exchange_and_add): Replace static specifier with always_inline
1789         attribute.
1790         (__exchange_and_add_single, __atomic_add_single): Likewise.
1791         (__exchange_and_add_dispatch, __atomic_add_dispatch): Likewise. Also
1792         combine !__gthread_active_p() and !__GTHREADS branches.
1793
1794 2019-07-03  Jonathan Wakely  <jwakely@redhat.com>
1795
1796         PR libstdc++/91067
1797         * acinclude.m4 (libtool_VERSION): Bump to 6:27:0.
1798         * configure: Regenerate.
1799         * config/abi/pre/gnu.ver (GLIBCXX_3.4.27): Add new version. Export
1800         missing symbols.
1801         * testsuite/27_io/filesystem/iterators/91067.cc: New test.
1802         * testsuite/util/testsuite_abi.cc: Add new symbol version.
1803
1804 2019-07-02  Jonathan Wakely  <jwakely@redhat.com>
1805
1806         * include/bits/c++config (_GLIBCXX_HAVE_BUILTIN_LAUNDER)
1807         (_GLIBCXX_HAVE_BUILTIN_IS_CONSTANT_EVALUATED): Use __has_builtin
1808         instead of __is_identifier to detect Clang support.
1809
1810 2019-07-02  Jim Wilson  <jimw@sifive.com>
1811
1812         * configure.ac (BUILD_PDF): Also test for doxygen, dot, xsltproc,
1813         and xmllint.
1814         * configure: Regenerate.
1815
1816 2019-06-27  Jonathan Wakely  <jwakely@redhat.com>
1817
1818         PR libstdc++/91012
1819         * src/c++17/fs_path.cc (filesystem_error::_Impl): Use a string_view
1820         for the what_arg parameters.
1821         (filesystem_error::filesystem_error): Pass system_error::what() to
1822         the _Impl constructor.
1823         * testsuite/27_io/filesystem/filesystem_error/cons.cc: Ensure that
1824         filesystem_error::what() contains system_error::what().
1825
1826 2019-06-26  Jonathan Wakely  <jwakely@redhat.com>
1827
1828         * include/std/charconv (chars_format): Define bitmask type.
1829         * testsuite/20_util/to_chars/chars_format.cc: New test.
1830
1831         * include/bits/fs_path.h (path::__is_encoded_char): Use __is_one_of.
1832         * include/std/bit (_If_is_unsigned_integer_type): Remove.
1833         (_If_is_unsigned_integer): Use __is_unsigned_integer.
1834         (rotl(byte, unsigned), rotr(byte, unsigned), countl_zero(byte))
1835         (countl_one(byte), countr_zero(byte), countr_one(byte))
1836         (popcount(byte), ispow2(byte), ceil2(byte), floor2(byte))
1837         (log2p1(byte)): Remove.
1838         * include/std/charconv (__detail::__is_one_of): Move to <type_traits>.
1839         (__detail::__is_int_to_chars_type): Remove.
1840         (__detail::__integer_to_chars_result_type): Use __is_signed_integer
1841         and __is_unsigned_integer.
1842         * include/std/type_traits (__is_one_of): Move here from <charconv>.
1843         (__is_signed_integer, __is_unsigned_integer): New helpers.
1844         * testsuite/26_numerics/bit/bit.pow.two/ceil2.cc: Remove test for
1845         std::byte overload.
1846         * testsuite/26_numerics/bit/bit.pow.two/floor2.cc: Likewise.
1847         * testsuite/26_numerics/bit/bit.pow.two/ispow2.cc: Likewise.
1848         * testsuite/26_numerics/bit/bit.pow.two/log2p1.cc: Likewise.
1849         * testsuite/26_numerics/bit/bitops.count/countl_one.cc: Likewise.
1850         * testsuite/26_numerics/bit/bitops.count/countl_zero.cc: Likewise.
1851         * testsuite/26_numerics/bit/bitops.count/countr_one.cc: Likewise.
1852         * testsuite/26_numerics/bit/bitops.count/countr_zero.cc: Likewise.
1853         * testsuite/26_numerics/bit/bitops.count/popcount.cc: Likewise.
1854         * testsuite/26_numerics/bit/bitops.rot/rotl.cc: Likewise.
1855         * testsuite/26_numerics/bit/bitops.rot/rotr.cc: Likewise.
1856
1857 2019-06-25  Jonathan Wakely  <jwakely@redhat.com>
1858
1859         * include/std/numeric (midpoint(T, T)): Avoid std::abs in constexpr
1860         function.
1861
1862 2019-06-25  Jakub Jelinek  <jakub@redhat.com>
1863
1864         * include/pstl/pstl_config.h (_PSTL_PRAGMA_SIMD_SCAN,
1865         _PSTL_PRAGMA_SIMD_INCLUSIVE_SCAN, _PSTL_PRAGMA_SIMD_EXCLUSIVE_SCAN):
1866         Define to OpenMP 5.0 pragmas even for GCC 10.0+.
1867         (_PSTL_UDS_PRESENT): Define to 1 for GCC 10.0+.
1868
1869 2019-06-24  Jonathan Wakely  <jwakely@redhat.com>
1870
1871         * include/std/numeric (midpoint(T, T)): Change implementation for
1872         floating-point types to avoid incorrect rounding of denormals.
1873         * testsuite/26_numerics/midpoint/floating.cc: Add check for correct
1874         rounding with denormals.
1875         * testsuite/26_numerics/gcd/gcd_neg.cc: Adjust dg-error line numbers.
1876         * testsuite/26_numerics/lcm/lcm_neg.cc: Likewise.
1877
1878         * testsuite/18_support/headers/cfloat/values_c++17.cc: New test.
1879
1880 2019-06-20  Jonathan Wakely  <jwakely@redhat.com>
1881
1882         * acinclude.m4 (GLIBCXX_ENABLE_DEBUG): Only do debug build for final
1883         stage of bootstrap.
1884         * configure: Regenerate.
1885
1886         * include/std/variant (_Variant_storage, _Extra_visit_slot_needed):
1887         Qualify calls to __never_valueless.
1888
1889         * doc/xml/manual/status_cxx2017.xml: Fix outdated reference to
1890         C++17 working draft.
1891
1892         * testsuite/libstdc++-prettyprinters/simple.cc: Use non-palindromic
1893         vector<bool> for test.
1894         * testsuite/libstdc++-prettyprinters/simple11.cc: Likewise.
1895
1896 2019-06-19  Jonathan Wakely  <jwakely@redhat.com>
1897
1898         * include/bits/stream_iterator.h (istream_iterator::_M_equal()): Make
1899         private.
1900         (istream_iterator::_M_read()): Do not check stream state before
1901         attempting extraction. Set stream pointer to null when extraction
1902         fails (P0738R2).
1903         (operator==(const istream_iterator&, const istream_iterator&)): Change
1904         to be a hidden friend of istream_iterator.
1905         (operator!=(const istream_iterator&, const istream_iterator&)):
1906         Likewise.
1907         (ostream_iterator::ostream_iterator()): Add default constructor.
1908         (ostream_iterator::ostream_iterator(ostream_type*, const C*)): Use
1909         addressof.
1910         * testsuite/24_iterators/istream_iterator/1.cc: New test.
1911         * testsuite/24_iterators/ostream_iterator/1.cc: New test.
1912         * testsuite/24_iterators/ostream_iterator/70766.cc: Also check
1913         constructor taking a string.
1914         * testsuite/24_iterators/ostream_iterator/requirements/constexpr.cc:
1915         New test.
1916
1917 2019-06-19  Michael Weghorn  <m.weghorn@posteo.de>
1918             Jonathan Wakely  <jwakely@redhat.com>
1919
1920         PR libstdc++/90945
1921         * python/libstdcxx/v6/printers.py (StdVectorPrinter._iterator): Use
1922         values of type bool for vector<bool> elements.
1923         * testsuite/libstdc++-prettyprinters/simple.cc: Test vector<bool>.
1924         * testsuite/libstdc++-prettyprinters/simple11.cc: Likewise.
1925
1926 2019-06-19  Jonathan Wakely  <jwakely@redhat.com>
1927
1928         PR libstdc++/90920 partially revert r263433
1929         * include/bits/stl_algo.h (__rotate): Restore checks for empty ranges.
1930         (rotate): Remove checks.
1931         * testsuite/25_algorithms/rotate/90920.cc: New test.
1932
1933         * include/std/numeric (reduce(Iter, Iter, T, BinOp)): Fix value
1934         category used in invocable check.
1935         (reduce(Iter, Iter, T)): Pass initial value as rvalue.
1936         * testsuite/26_numerics/reduce/2.cc: New test.
1937
1938 2019-06-18  Jonathan Wakely  <jwakely@redhat.com>
1939
1940         * include/bits/algorithmfwd.h: Change title of doc group.
1941         * include/bits/stl_algo.h (for_each_n): Add new C++17 algorithm from
1942         P0024R2.
1943         * include/bits/stl_numeric.h: Define doc group and add algos to it.
1944         * include/std/numeric (__is_random_access_iter): New internal trait.
1945         (reduce, transform_reduce, exclusive_scan, inclusive_scan)
1946         (transform_exclusive_scan, transform_inclusive_scan): Likewise.
1947         * testsuite/25_algorithms/for_each/for_each_n.cc: New test.
1948         * testsuite/26_numerics/exclusive_scan/1.cc: New test.
1949         * testsuite/26_numerics/inclusive_scan/1.cc: New test.
1950         * testsuite/26_numerics/reduce/1.cc: New test.
1951         * testsuite/26_numerics/transform_exclusive_scan/1.cc: New test.
1952         * testsuite/26_numerics/transform_inclusive_scan/1.cc: New test.
1953         * testsuite/26_numerics/transform_reduce/1.cc: New test.
1954         * testsuite/util/testsuite_iterators.h (test_container::size()): New
1955         member function.
1956
1957         * include/c_global/cstddef (std::byte): Perform arithmetic operations
1958         in unsigned int to avoid promotion (LWG 2950).
1959
1960 2019-06-17  Jonathan Wakely  <jwakely@redhat.com>
1961
1962         * testsuite/20_util/allocator/1.cc: Add sized delete, which fixes a
1963         failure on AIX.
1964
1965         * include/c_global/cmath (__lerp, lerp): Add noexcept (LWG 3201).
1966
1967         PR libstdc++/90281 Fix string conversions for filesystem::path
1968         * include/bits/fs_path.h (u8path) [_GLIBCXX_FILESYSTEM_IS_WINDOWS]:
1969         Use codecvt_utf8_utf16 instead of codecvt_utf8. Use
1970         __str_codecvt_in_all to fail for partial conversions and throw on
1971         error.
1972         [!_GLIBCXX_FILESYSTEM_IS_WINDOWS && _GLIBCXX_USE_CHAR8_T]
1973         (path::_Cvt<char8_t>): Add explicit specialization.
1974         [_GLIBCXX_FILESYSTEM_IS_WINDOWS] (path::_Cvt::_S_wconvert): Remove
1975         overloads.
1976         [_GLIBCXX_FILESYSTEM_IS_WINDOWS] (path::_Cvt::_S_convert): Use
1977         if-constexpr instead of dispatching to _S_wconvert. Use codecvt
1978         instead of codecvt_utf8. Use __str_codecvt_in_all and
1979         __str_codecvt_out_all.
1980         [!_GLIBCXX_FILESYSTEM_IS_WINDOWS] (path::_Cvt::_S_convert): Use
1981         codecvt instead of codecvt_utf8. Use __str_codecvt_out_all.
1982         (path::_S_str_convert) [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Use
1983         codecvt_utf8_utf16 instead of codecvt_utf8. Construct return values
1984         with allocator. Use __str_codecvt_out_all. Fallthrough to POSIX code
1985         after converting to UTF-8.
1986         (path::_S_str_convert): Use codecvt instead of codecvt_utf8. Use
1987         __str_codecvt_in_all.
1988         (path::string): Fix initialization of string types with different
1989         allocators.
1990         (path::u8string) [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Use
1991         codecvt_utf8_utf16 instead of codecvt_utf8. Use __str_codecvt_out_all.
1992         * include/bits/locale_conv.h (__do_str_codecvt): Reorder static and
1993         runtime conditions.
1994         (__str_codecvt_out_all, __str_codecvt_in_all): New functions that
1995         return false for partial conversions.
1996         * include/experimental/bits/fs_path.h (u8path):
1997         [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Implement correctly for mingw.
1998         [_GLIBCXX_FILESYSTEM_IS_WINDOWS] (path::_Cvt::_S_wconvert): Add
1999         missing handling for char8_t. Use codecvt and codecvt_utf8_utf16
2000         instead of codecvt_utf8. Use __str_codecvt_in_all and
2001         __str_codecvt_out_all.
2002         [!_GLIBCXX_FILESYSTEM_IS_WINDOWS] (path::_Cvt::_S_convert): Use
2003         codecvt instead of codecvt_utf8. Use __str_codecvt_out_all.
2004         (path::string) [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Use
2005         codecvt_utf8_utf16 instead of codecvt_utf8. Construct return values
2006         with allocator. Use __str_codecvt_out_all and __str_codecvt_in_all.
2007         (path::string) [!_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Use
2008         __str_codecvt_in_all.
2009         (path::u8string) [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Use
2010         codecvt_utf8_utf16 instead of codecvt_utf8. Use __str_codecvt_out_all.
2011         * src/c++17/fs_path.cc (path::_S_convert_loc): Use
2012         __str_codecvt_in_all.
2013         * src/filesystem/path.cc (path::_S_convert_loc): Likewise.
2014         * testsuite/27_io/filesystem/path/construct/90281.cc: New test.
2015         * testsuite/27_io/filesystem/path/factory/u8path.cc: New test.
2016         * testsuite/27_io/filesystem/path/native/string.cc: Test with empty
2017         strings and with Unicode characters outside the basic multilingual
2018         plane.
2019         * testsuite/27_io/filesystem/path/native/alloc.cc: New test.
2020         * testsuite/experimental/filesystem/path/construct/90281.cc: New test.
2021         * testsuite/experimental/filesystem/path/factory/u8path.cc: New test.
2022         * testsuite/experimental/filesystem/path/native/alloc.cc: New test.
2023         * testsuite/experimental/filesystem/path/native/string.cc: Test with
2024         empty strings and with Unicode characters outside the basic
2025         multilingual plane.
2026
2027 2019-06-17  François Dumont  <fdumont@gcc.gnu.org>
2028             Jonathan Wakely  <jwakely@redhat.com>
2029
2030         * include/bits/hashtable.h (struct _Hashtable::_Scoped_node): New type.
2031         (_Hashtable::_M_insert_unique_node): Add key_type parameter. Don't
2032         deallocate node if insertion fails.
2033         (_Hashtable::_M_insert_multi_node): Likewise.
2034         (_Hashtable::_M_reinsert_node): Pass additional key argument.
2035         (_Hashtable::_M_reinsert_node_multi): Likewise. Remove FIXME.
2036         (_Hashtable::_M_extract_node(size_t, __node_base*)): New function.
2037         (_Hashtable::extract(const_iterator)): Use _M_extract_node.
2038         (_Hashtable::extract(const _Key&)): Likewise.
2039         (_Hashtable::_M_merge_unique): Pass additional key argument.
2040         (_Hashtable::_M_emplace<Args>(true_type, Args&&...)): Likewise. Use
2041         _Scoped_node.
2042         (_Hashtable::_M_insert): Likewise.
2043         * include/bits/hashtable_policy.h (_Map_base::operator[]): Likewise.
2044         (_Hashtable_alloc): Add comments to functions with misleading names.
2045
2046 2019-06-17  Jonathan Wakely  <jwakely@redhat.com>
2047
2048         * testsuite/20_util/bad_function_call/what.cc: Include <string> header
2049         for std::string.
2050         * testsuite/20_util/shared_ptr/cons/weak_ptr_expired.cc: Likewise.
2051         * testsuite/20_util/tuple/cons/allocator_with_any.cc: Include <memory>
2052         header for std::allocator.
2053         * testsuite/23_containers/array/tuple_interface/tuple_element.cc: Add
2054         using-declaration for std::size_t.
2055         * testsuite/23_containers/array/tuple_interface/tuple_size.cc:
2056         Likewise.
2057         * testsuite/23_containers/deque/cons/55977.cc: Include <istream> for
2058         std::istream.
2059         * testsuite/23_containers/vector/cons/55977.cc: Likewise.
2060         * testsuite/experimental/map/erasure.cc: Include <string> for
2061         std::string.
2062         * testsuite/experimental/unordered_map/erasure.cc: Likewise.
2063
2064 2019-06-14  Jonathan Wakely  <jwakely@redhat.com>
2065
2066         * include/experimental/type_traits (experimental::nonesuch): Use
2067         pragma to disable -Wctor-dtor-privacy warnings.
2068         * include/std/type_traits (__is_convertible_helper<From, To, false>)
2069         (__is_nt_convertible_helper<From, To, false>, __nonesuch): Likewise.
2070
2071         * include/std/version (__cpp_lib_bind_front): Add missing macro.
2072
2073 2019-06-12  Jonathan Wakely  <jwakely@redhat.com>
2074
2075         * include/std/algorithm (__cpp_lib_parallel_algorithm): Fix value.
2076         * include/std/memory (__cpp_lib_parallel_algorithm): Likewise.
2077         * include/std/numeric (__cpp_lib_parallel_algorithm): Likewise.
2078         * testsuite/25_algorithms/pstl/feature_test.cc: New test.
2079
2080         * include/std/variant (get<T>, get<N>, get_if<N>, get_if<T>)
2081         (variant::emplace): Change static_assert messages from "should be"
2082         to "must be".
2083         (hash<monostate>::operator()): Remove name of unused parameter.
2084
2085         * include/std/mutex (scoped_lock::~scoped_lock()): Use fold
2086         expression.
2087
2088         * include/Makefile.am: Add new <bits/charconv.h> header.
2089         * include/Makefile.in: Regenerate.
2090         * include/bits/basic_string.h (to_string(int), to_string(unsigned))
2091         (to_string(long), to_string(unsigned long), to_string(long long))
2092         (to_string(unsigned long long)): Rewrite to use __to_chars_10_impl.
2093         * include/bits/charconv.h: New header.
2094         (__detail::__to_chars_len): Move here from <charconv>.
2095         (__detail::__to_chars_10_impl): New function extracted from
2096         __detail::__to_chars_10.
2097         * include/std/charconv (__cpp_lib_to_chars): Add, but comment out.
2098         (__to_chars_unsigned_type): New class template that reuses
2099         __make_unsigned_selector_base::__select to pick a type.
2100         (__unsigned_least_t): Redefine as __to_chars_unsigned_type<T>::type.
2101         (__detail::__to_chars_len): Move to new header.
2102         (__detail::__to_chars_10): Add inline specifier. Move code doing the
2103         output to __detail::__to_chars_10_impl and call that.
2104         * include/std/version (__cpp_lib_to_chars): Add, but comment out.
2105         * testsuite/21_strings/basic_string/numeric_conversions/char/
2106         to_string.cc: Fix reference in comment. Remove unused variable.
2107         * testsuite/21_strings/basic_string/numeric_conversions/char/
2108         to_string_int.cc: New test.
2109
2110 2019-06-09  Edward Smith-Rowland  <3dw4rd@verizon.net>
2111
2112         Fix ConstexprIterator requirements tests - No constexpr algorithms!
2113         * testsuite/21_strings/basic_string_view/requirements/constexpr_iter.cc:
2114         Replace copy with hand-rolled loop.
2115         * testsuite/23_containers/array/requirements/constexpr_iter.cc:
2116         Ditto.
2117
2118 2019-06-08  Edward Smith-Rowland  <3dw4rd@verizon.net>
2119
2120         Test for C++20 p0858 - ConstexprIterator requirements.
2121         * testsuite/21_strings/basic_string_view/requirements/constexpr_iter.cc:
2122         New test.
2123         * testsuite/23_containers/array/requirements/constexpr_iter.cc:
2124         New test.
2125
2126 2019-06-07  Thomas Rodgers  <trodgers@redhat.com>
2127
2128         Rename PSTL macro's consistent with libstdc++ (and llvm upstream
2129         project) standards.
2130         * include/bits/c++config: Rename all macros of the form __PSTL* to
2131         _PSTL*.
2132         * include/std/algorithm: Likewise.
2133         * include/std/execution: Likewise.
2134         * include/std/numeric: Likewise.
2135         * include/std/memory: Likewise.
2136         * include/pstl/glue_memory_impl.h: Likewise.
2137         * include/pstl/numeric_impl.h: Likewise.
2138         * include/pstl/glue_memory_defs.h: Likewise.
2139         * include/pstl/execution_defs.h: Likewise.
2140         * include/pstl/utils.h: Likewise.
2141         * include/pstl/algorithm_fwd.h: Likewise.
2142         * include/pstl/unseq_backend_simd.h: Likewise.
2143         * include/pstl/glue_execution_defs.h: Likewise.
2144         * include/pstl/algorithm_impl.h: Likewise.
2145         * include/pstl/parallel_impl.h: Likewise.
2146         * include/pstl/memory_impl.h: Likewise.
2147         * include/pstl/glue_numeric_defs.h: Likewise.
2148         * include/pstl/parallel_backend_utils.h: Likewise.
2149         * include/pstl/glue_algorithm_defs.h: Likewise.
2150         * include/pstl/parallel_backend.h: Likewise.
2151         * include/pstl/glue_numeric_impl.h: Likewise.
2152         * include/pstl/parallel_backend_tbb.h: Likewise.
2153         * include/pstl/numeric_fwd.h: Likewise.
2154         * include/pstl/glue_algorithm_impl.h: Likewise.
2155         * include/pstl/execution_impl.h: Likewise.
2156         * include/pstl/pstl_config.h: Likewise.
2157         * testsuite/util/pstl/pstl_test_config.h: Likewise.
2158         * testsuite/util/pstl/test_utils.h: Likewise.
2159         * testsuite/20_util/specialized_algorithms/pstl/uninitialized_construct.cc:
2160         Likewise.
2161         * testsuite/20_util/specialized_algorithms/pstl/uninitialized_copy_move.cc:
2162         Likewise.
2163         * testsuite/26_numerics/pstl/numeric_ops/adjacent_difference.cc:
2164         Likewise.
2165         * testsuite/26_numerics/pstl/numeric_ops/scan.cc: Likewise.
2166         * testsuite/26_numerics/pstl/numeric_ops/transform_scan.cc: Likewise.
2167         * testsuite/26_numerics/pstl/numeric_ops/reduce.cc: Likewise.
2168         * testsuite/25_algorithms/pstl/alg_nonmodifying/reverse.cc: Likewise.
2169         * testsuite/25_algorithms/pstl/alg_nonmodifying/nth_element.cc:
2170         Likewise.
2171         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_end.cc: Likewise.
2172         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_if.cc: Likewise.
2173         * testsuite/25_algorithms/pstl/alg_nonmodifying/none_of.cc: Likewise.
2174         * testsuite/25_algorithms/pstl/alg_nonmodifying/count.cc: Likewise.
2175         * testsuite/25_algorithms/pstl/alg_nonmodifying/reverse_copy.cc:
2176         Likewise.
2177         * testsuite/25_algorithms/pstl/alg_nonmodifying/equal.cc: Likewise.
2178         * testsuite/25_algorithms/pstl/alg_nonmodifying/search_n.cc: Likewise.
2179         * testsuite/25_algorithms/pstl/alg_nonmodifying/find.cc: Likewise.
2180         * testsuite/25_algorithms/pstl/alg_nonmodifying/all_of.cc: Likewise.
2181         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_first_of.cc:
2182         Likewise.
2183         * testsuite/25_algorithms/pstl/alg_sorting/is_heap.cc: Likewise.
2184         * testsuite/25_algorithms/pstl/alg_sorting/partial_sort.cc: Likewise.
2185         * testsuite/25_algorithms/pstl/alg_sorting/partial_sort_copy.cc:
2186         Likewise.
2187         * testsuite/25_algorithms/pstl/alg_sorting/lexicographical_compare.cc:
2188         Likewise.
2189         * testsuite/25_algorithms/pstl/alg_merge/inplace_merge.cc: Likewise.
2190         * testsuite/25_algorithms/pstl/alg_merge/merge.cc: Likewise.
2191         * testsuite/25_algorithms/pstl/alg_modifying_operations/unique_copy_equal.cc:
2192         Likewise.
2193         * testsuite/25_algorithms/pstl/alg_modifying_operations/replace_copy.cc:
2194         Likewise.
2195         * testsuite/25_algorithms/pstl/alg_modifying_operations/is_partitioned.cc:
2196         Likewise.
2197         * testsuite/25_algorithms/pstl/alg_modifying_operations/rotate_copy.cc:
2198         Likewise.
2199         * testsuite/25_algorithms/pstl/alg_modifying_operations/remove.cc:
2200         Likewise.
2201         * testsuite/25_algorithms/pstl/alg_modifying_operations/copy_if.cc:
2202         Likewise.
2203         * testsuite/25_algorithms/pstl/alg_modifying_operations/partition_copy.cc:
2204         Likewise.
2205         * testsuite/25_algorithms/pstl/alg_modifying_operations/partition.cc:
2206         Likewise.
2207         * testsuite/25_algorithms/pstl/alg_modifying_operations/copy_move.cc:
2208         Likewise.
2209         * testsuite/25_algorithms/pstl/alg_modifying_operations/unique.cc:
2210         Likewise.
2211         * testsuite/25_algorithms/pstl/alg_modifying_operations/rotate.cc:
2212         Likewise.
2213         * testsuite/25_algorithms/pstl/alg_nonmodifying/any_of.cc: Likewise.
2214
2215         Rename header guards to be consistent with upstream project's
2216         conventions.
2217         * include/pstl/glue_memory_impl.h: Rename all macros of the form
2218         _PSTL_(.*)_H to _PSTL_\U\1_H.
2219         * include/pstl/numeric_impl.h: Likewise.
2220         * include/pstl/glue_memory_defs.h: Likewise.
2221         * include/pstl/execution_defs.h: Likewise.
2222         * include/pstl/utils.h: Likewise.
2223         * include/pstl/algorithm_fwd.h: Likewise.
2224         * include/pstl/unseq_backend_simd.h: Likewise.
2225         * include/pstl/glue_execution_defs.h: Likewise.
2226         * include/pstl/algorithm_impl.h: Likewise.
2227         * include/pstl/parallel_impl.h: Likewise.
2228         * include/pstl/memory_impl.h: Likewise.
2229         * include/pstl/glue_numeric_defs.h: Likewise.
2230         * include/pstl/parallel_backend_utils.h: Likewise.
2231         * include/pstl/glue_algorithm_defs.h: Likewise.
2232         * include/pstl/parallel_backend.h: Likewise.
2233         * include/pstl/glue_numeric_impl.h: Likewise.
2234         * include/pstl/parallel_backend_tbb.h: Likewise.
2235         * include/pstl/numeric_fwd.h: Likewise.
2236         * include/pstl/glue_algorithm_impl.h: Likewise.
2237         * include/pstl/execution_impl.h: Likewise.
2238         * include/pstl/pstl_config.h: Likewise.
2239         * testsuite/util/pstl/pstl_test_config.h: Likewise.
2240
2241         Synchronize libstdc++ parallel algorithms with upstream
2242         project.
2243         * include/pstl/algorithm_fwd.h: Synchronize with
2244         upstream PSTL project.
2245         * include/pstl/algorithm_impl.h: Likewise.
2246         * include/pstl/execution_defs.h: Likewise.
2247         * include/pstl/execution_impl.h: Likewise.
2248         * include/pstl/glue_algorithm_impl.h: Likewise.
2249         * include/pstl/glue_execution_defs.h: Likewise.
2250         * include/pstl/numeric_fwd.h: Likewise.
2251         * include/pstl/numeric_impl.h: Likewise.
2252         * include/pstl/parallel_backend.h: Likewise.
2253         * include/pstl/pstl_config.h: Likewise.
2254         * include/pstl/unseq_backend_simd.h: Likewise.
2255         * include/pstl/parallel_backend_serial.h: New file.
2256         * include/Makefile.am (pstl_headers): Add
2257         parallel_backend_serial.h.
2258         * include/Makefile.in: Regenerate.
2259
2260         Clean up non-conforming names
2261         * include/pstl/algorithm_impl.h (__parallel_set_union_op):
2262         Uglfiy copy_range1 and copy_range2
2263         (__pattern_walk2_n): Rename local n to __n
2264         * include/pstl/parallel_backend_tbb.h (struct __binary_no_op):
2265         Rename parameter _T to _Tp.
2266
2267         Integrate non-TBB serial backend support
2268         * include/bits/c++config: Adjust TBB detection logic to select serial
2269         PSTL backend if no TBB present.
2270         * testsuite/utils/pstl/test_utils.h: Remove check for
2271         _PSTL_USE_PAR_POLICIES
2272
2273 2019-06-07  Jonathan Wakely  <jwakely@redhat.com>
2274
2275         * testsuite/24_iterators/container_access.cc: Move dg-options before
2276         dg-do directive so the target check uses the -std option.
2277
2278         PR libstdc++/90770
2279         * configure: Regenerate.
2280         * src/Makefile.am (stamp-debug): Also test for missing makefile.
2281         * src/Makefile.in: Regenerate.
2282
2283 2019-06-06  Jonathan Wakely  <jwakely@redhat.com>
2284
2285         * include/std/array: Do not include <stdexcept>.
2286         * include/std/optional: Include <exception> and
2287         <bits/exception_defines.h> instead of <stdexcept>.
2288         * testsuite/20_util/function_objects/searchers.cc: Include <cctype>
2289         for std::isalnum.
2290         * testsuite/20_util/tuple/cons/deduction.cc: Include <memory> for
2291         std::allocator.
2292         * testsuite/23_containers/map/erasure.cc: Include <string>.
2293         * testsuite/23_containers/unordered_map/erasure.cc: Likewise.
2294
2295         * testsuite/23_containers/deque/requirements/dr438/assign_neg.cc: Add
2296         dg-prune-output for different C++98 diagnostic.
2297         * testsuite/23_containers/deque/requirements/dr438/constructor_1_neg.cc:
2298         Likewise.
2299         * testsuite/23_containers/deque/requirements/dr438/constructor_2_neg.cc:
2300         Likewise.
2301         * testsuite/23_containers/deque/requirements/dr438/insert_neg.cc:
2302         Likewise.
2303         * testsuite/23_containers/list/requirements/dr438/assign_neg.cc:
2304         Likewise.
2305         * testsuite/23_containers/list/requirements/dr438/constructor_1_neg.cc:
2306         Likewise.
2307         * testsuite/23_containers/list/requirements/dr438/constructor_2_neg.cc:
2308         Likewise.
2309         * testsuite/23_containers/list/requirements/dr438/insert_neg.cc:
2310         Likewise.
2311         * testsuite/23_containers/vector/requirements/dr438/assign_neg.cc:
2312         Likewise.
2313         * testsuite/23_containers/vector/requirements/dr438/
2314         constructor_1_neg.cc: Likewise.
2315         * testsuite/23_containers/vector/requirements/dr438/
2316         constructor_2_neg.cc: Likewise.
2317         * testsuite/23_containers/vector/requirements/dr438/insert_neg.cc:
2318         Likewise.
2319         * testsuite/libstdc++-prettyprinters/compat.cc: Do not run for C++98.
2320
2321         * testsuite/23_containers/unordered_map/requirements/debug_container.cc:
2322         Do not test allocator rebinding extension for C++2a.
2323         * testsuite/23_containers/unordered_set/allocator/ext_ptr.cc: Change
2324         dg-do directive for C++17 and C++2a.
2325
2326         * testsuite/23_containers/deque/requirements/explicit_instantiation/
2327         1_c++0x.cc: Remove redundant test.
2328         * testsuite/23_containers/deque/requirements/explicit_instantiation/
2329         2.cc: Use target selector instead of preprocessor condition.
2330         * testsuite/23_containers/deque/requirements/explicit_instantiation/
2331         3.cc: Do not run test for C++2a.
2332         * testsuite/23_containers/forward_list/requirements/
2333         explicit_instantiation/3.cc: Likewise.
2334         * testsuite/23_containers/forward_list/requirements/
2335         explicit_instantiation/5.cc: Do not test allocator rebinding extension
2336         for C++2a.
2337         * testsuite/23_containers/list/requirements/explicit_instantiation/
2338         1_c++0x.cc: Remove redundant test.
2339         * testsuite/23_containers/list/requirements/explicit_instantiation/
2340         2.cc: Use target selector instead of preprocessor condition.
2341         * testsuite/23_containers/list/requirements/explicit_instantiation/
2342         3.cc: Do not run test for C++2a.
2343         * testsuite/23_containers/list/requirements/explicit_instantiation/
2344         5.cc: Do not test allocator rebinding extension for C++2a.
2345         * testsuite/23_containers/map/requirements/explicit_instantiation/
2346         1_c++0x.cc: Remove redundant test.
2347         * testsuite/23_containers/map/requirements/explicit_instantiation/
2348         2.cc: Adjust comment.
2349         * testsuite/23_containers/map/requirements/explicit_instantiation/
2350         3.cc: Do not run test for C++2a.
2351         * testsuite/23_containers/map/requirements/explicit_instantiation/
2352         5.cc: Do not test allocator rebinding extension for C++2a.
2353         * testsuite/23_containers/multimap/requirements/explicit_instantiation/
2354         1_c++0x.cc: Remove redundant test.
2355         * testsuite/23_containers/multimap/requirements/explicit_instantiation/
2356         3.cc: Do not run test for C++2a.
2357         * testsuite/23_containers/multimap/requirements/explicit_instantiation/
2358         5.cc: Do not test allocator rebinding extension for C++2a.
2359         * testsuite/23_containers/multiset/requirements/explicit_instantiation/
2360         3.cc: Do not run test for C++2a.
2361         * testsuite/23_containers/multiset/requirements/explicit_instantiation/
2362         5.cc: Do not test allocator rebinding extension for C++2a.
2363         * testsuite/23_containers/set/requirements/explicit_instantiation/3.cc:
2364         Do not run test for C++2a.
2365         * testsuite/23_containers/set/requirements/explicit_instantiation/
2366         1_c++0x.cc: Remove redundant test.
2367         * testsuite/23_containers/set/requirements/explicit_instantiation/5.cc:
2368         Do not test allocator rebinding extension for C++2a.
2369         * testsuite/23_containers/unordered_map/requirements/
2370         explicit_instantiation/3.cc: Likewise.
2371         * testsuite/23_containers/unordered_map/requirements/
2372         explicit_instantiation/5.cc: Do not test allocator rebinding extension
2373         for C++2a.
2374         * testsuite/23_containers/unordered_multimap/requirements/
2375         explicit_instantiation/3.cc: Do not run test for C++2a.
2376         * testsuite/23_containers/unordered_multimap/requirements/
2377         explicit_instantiation/5.cc: Do not test allocator rebinding extension
2378         for C++2a.
2379         * testsuite/23_containers/unordered_multiset/requirements/
2380         explicit_instantiation/3.cc: Do not run test for C++2a.
2381         * testsuite/23_containers/unordered_multiset/requirements/
2382         explicit_instantiation/5.cc: Do not test allocator rebinding extension
2383         for C++2a.
2384         * testsuite/23_containers/unordered_set/requirements/
2385         explicit_instantiation/3.cc: Do not run test for C++2a.
2386         * testsuite/23_containers/unordered_set/requirements/
2387         explicit_instantiation/5.cc: Do not test allocator rebinding extension
2388         for C++2a.
2389         * testsuite/23_containers/vector/ext_pointer/explicit_instantiation/
2390         2.cc: Remove redundant test.
2391         * testsuite/23_containers/vector/ext_pointer/explicit_instantiation/
2392         3.cc: Do not run test for C++2a.
2393         * testsuite/23_containers/vector/requirements/explicit_instantiation/
2394         3.cc: Likewise.
2395
2396         * include/std/type_traits (is_empty, is_polymorphic, is_final)
2397         (is_abstract, is_aggregate): Remove static_assert.
2398         * testsuite/20_util/is_abstract/incomplete_neg.cc: Check for error
2399         from builtin only.
2400         * testsuite/20_util/is_aggregate/incomplete_neg.cc: Likewise. Add
2401         missing -std=gnu++17 option.
2402         * testsuite/20_util/is_empty/incomplete_neg.cc: New test.
2403         * testsuite/20_util/is_final/incomplete_neg.cc: New test.
2404         * testsuite/20_util/is_polymorphic/incomplete_neg.cc: Check for error
2405         from builtin only.
2406
2407         * testsuite/18_support/set_terminate.cc: Do not run for C++98 mode.
2408         * testsuite/18_support/set_unexpected.cc: Likewise.
2409         * testsuite/20_util/is_nothrow_invocable/value.cc: Test converting to
2410         void.
2411         * testsuite/20_util/is_nothrow_invocable/value_ext.cc: Fix constexpr
2412         function to be valid in C++11.
2413         * testsuite/26_numerics/complex/proj.cc: Do not run for C++98 mode.
2414         * testsuite/experimental/names.cc: Do not run for C++98 mode. Do not
2415         include Library Fundamentals or Networking headers in C++11 mode.
2416         * testsuite/ext/char8_t/atomic-1.cc: Do not run for C++98 mode.
2417
2418         * include/std/tuple (_TC): Replace with _TupleConstraints.
2419         (_TupleConstraints): New helper for SFINAE constraints, with more
2420         expressive member functions to reduce duplication when used.
2421         (tuple::_TC2, tuple::_TMC, tuple::_TNTC): Remove.
2422         (tuple::_TCC): Replace dummy type parameter with bool non-type
2423         parameter that can be used to check the pack size.
2424         (tuple::_ImplicitDefaultCtor, tuple::_ExplicitDefaultCtor)
2425         (tuple::_ImplicitCtor, tuple::_ExplicitCtor): New alias templates for
2426         checking constraints in constructors.
2427         (tuple::__valid_args, tuple::_UseOtherCtor, tuple::__use_other_ctor):
2428         New SFINAE helpers.
2429         (tuple::tuple): Use new helpers to reduce repitition in constraints.
2430         (tuple::tuple(allocator_arg_t, const Alloc&)): Constrain.
2431         (tuple<T1, T2>::_TCC, tuple<T1, T2>::_ImplicitDefaultCtor)
2432         (tuple<T1, T2>::_ExplicitDefaultCtor, tuple<T1, T2>::_ImplicitCtor)
2433         (tuple<T1, T2>::_ExplicitCtor): New alias templates for checking
2434         constraints in constructors.
2435         (tuple::__is_alloc_arg()): New SFINAE helpers.
2436         (tuple<T1, T2>::tuple): Use new helpers to reduce repitition in
2437         constraints.
2438         (tuple<T1, T2>::tuple(allocator_arg_t, const Alloc&)): Constrain.
2439         * testsuite/20_util/tuple/cons/90700.cc: New test.
2440         * testsuite/20_util/tuple/cons/allocators.cc: Add default constructor
2441         to meet new constraint on allocator-extended default constructor.
2442
2443 2019-06-03  Jonathan Wakely  <jwakely@redhat.com>
2444
2445         * include/bits/stl_map.h (map): Disable static assert for C++98 mode.
2446         * include/bits/stl_multimap.h (multimap): Likewise.
2447
2448 2019-06-03  François Dumont  <fdumont@gcc.gnu.org>
2449
2450         Rename variables and cleanup comments.
2451         * include/bits/hashtable_policy.h
2452         * include/bits/hashtable.h
2453
2454 2019-06-03  Jonathan Wakely  <jwakely@redhat.com>
2455
2456         * doc/xml/manual/status_cxx2020.xml: Add missing row for P0920R2.
2457         Fix bgcolor for P0340R3.
2458         * doc/html/*: Regenerate.
2459
2460         PR libstdc++/90686
2461         * doc/xml/manual/status_cxx2014.xml: Document what's missing from
2462         <experimental/memory_resource>.
2463         * doc/xml/manual/status_cxx2020.xml: Document status of P1285R0,
2464         P0339R6, P0340R3, P1164R1 and P1357R1.
2465         * doc/html/*: Regenerate.
2466
2467         * doc/xml/manual/status_cxx2020.xml: Document P1463R1 status.
2468         * include/bits/forward_list.h [__cplusplus > 201703]: Enable
2469         allocator::value_type assertion for C++2a.
2470         * include/bits/hashtable.h: Likewise.
2471         * include/bits/stl_deque.h: Likewise.
2472         * include/bits/stl_list.h: Likewise.
2473         * include/bits/stl_map.h: Likewise.
2474         * include/bits/stl_multimap.h: Likewise.
2475         * include/bits/stl_multiset.h: Likewise.
2476         * include/bits/stl_set.h: Likewise.
2477         * include/bits/stl_vector.h: Likewise.
2478         * testsuite/23_containers/deque/48101-3_neg.cc: New test.
2479         * testsuite/23_containers/forward_list/48101-3_neg.cc: New test.
2480         * testsuite/23_containers/list/48101-3_neg.cc: New test.
2481         * testsuite/23_containers/map/48101-3_neg.cc: New test.
2482         * testsuite/23_containers/multimap/48101-3_neg.cc: New test.
2483         * testsuite/23_containers/multiset/48101-3_neg.cc: New test.
2484         * testsuite/23_containers/set/48101-3_neg.cc: New test.
2485         * testsuite/23_containers/unordered_map/48101-3_neg.cc: New test.
2486         * testsuite/23_containers/unordered_multimap/48101-3_neg.cc: New test.
2487         * testsuite/23_containers/unordered_multiset/48101-3_neg.cc: New test.
2488         * testsuite/23_containers/unordered_set/48101-3_neg.cc: New test.
2489         * testsuite/23_containers/vector/48101-3_neg.cc: New test.
2490
2491 2019-05-31  Gerald Pfeifer  <gerald@pfeifer.com>
2492
2493         * doc/xml/manual/allocator.xml: Move hoard.org back to http.
2494
2495 2019-05-31  Jonathan Wakely  <jwakely@redhat.com>
2496
2497         * include/std/tuple (tuple<>): Add noexcept to allocator-extended
2498         constructors.
2499         (tuple<T1, T2>::__nothrow_default_constructible()): New helper
2500         function.
2501         (tuple<T1, T2>::tuple(), explicit tuple<T1, T2>::tuple()): Use helper.
2502
2503 2019-05-31  Jonathan Wakely  <jwakely@redhat.com>
2504
2505         * src/c++98/bitmap_allocator.cc: Add using-declaration for size_t.
2506
2507         PR libstdc++/90682
2508         * libsupc++/eh_term_handler.cc: Include eh_term_handler.h to get
2509         definition of _GLIBCXX_DEFAULT_TERM_HANDLER.
2510         * libsupc++/eh_term_handler.h: New header defining
2511         _GLIBCXX_DEFAULT_TERM_HANDLER.
2512         * libsupc++/eh_terminate.cc: Include eh_term_handler.h.
2513         (set_terminate): Restore default handler when argument is null.
2514         (set_unexpected): Likewise.
2515         * testsuite/18_support/set_terminate.cc: New test.
2516         * testsuite/18_support/set_unexpected.cc: New test.
2517
2518         * include/backward/hashtable.h (size_t, ptrdiff_t)
2519         (forward_iterator_tag, input_iterator_tag, _Construct, _Destroy)
2520         (distance, vector, pair, __iterator_category): Remove
2521         using-declarations that add these names to namespace __gnu_cxx.
2522         * include/ext/bitmap_allocator.h (size_t, ptrdiff_t): Likewise.
2523         * include/ext/debug_allocator.h (size_t): Likewise.
2524         * include/ext/functional (size_t, unary_function, binary_function)
2525         (mem_fun1_t, const_mem_fun1_t, mem_fun1_ref_t, const_mem_fun1_ref_t):
2526         Likewise.
2527         * include/ext/malloc_allocator.h (size_t, ptrdiff_t): Likewise.
2528         * include/ext/memory (ptrdiff_t, pair, __iterator_category): Likewise.
2529         * include/ext/mt_allocator.h (size_t, ptrdiff_t): Likewise.
2530         * include/ext/new_allocator.h (size_t, ptrdiff_t): Likewise.
2531         * include/ext/numeric (iota): Fix outdated comment.
2532         * include/ext/pool_allocator.h (size_t, ptrdiff_t): Likewise.
2533         * include/ext/rb_tree (_Rb_tree, allocator): Likewise.
2534         * include/ext/rope (size_t, ptrdiff_t, allocator, _Destroy): Likewise.
2535         * include/ext/ropeimpl.h (size_t, printf, basic_ostream)
2536         (__throw_length_error, _Destroy, std::__uninitialized_fill_n_a):
2537         Likewise.
2538         * include/ext/slist (size_t, ptrdiff_t, _Construct, _Destroy)
2539         (allocator, __true_type, __false_type): Likewise.
2540
2541 2019-05-31  Antony Polukhin  <antoshkka@gmail.com>
2542
2543         PR libstdc++/71579
2544         * include/std/type_traits __type_identity, __is_complete_or_unbounded):
2545         New helpers for checking preconditions in traits.
2546         (is_trivial, is_trivially_copyable, is_standard_layout, is_pod)
2547         (is_literal_type, is_empty, is_polymorphic, is_final, is_abstract)
2548         (is_destructible, is_nothrow_destructible, is_constructible)
2549         (is_default_constructible, is_copy_constructible)
2550         (is_move_constructible, is_nothrow_default_constructible)
2551         (is_nothrow_constructible, is_nothrow_copy_constructible)
2552         (is_nothrow_move_constructible, is_copy_assignable, is_move_assignable)
2553         (is_nothrow_assignable, is_nothrow_copy_assignable)
2554         (is_nothrow_move_assignable, is_trivially_constructible)
2555         (is_trivially_copy_constructible, is_trivially_move_constructible)
2556         is_trivially_assignable, is_trivially_copy_assignable)
2557         (is_trivially_move_assignable, is_trivially_destructible)
2558         (alignment_of, is_swappable, is_nothrow_swappable, is_invocable)
2559         (is_invocable_r, is_nothrow_invocable)
2560         (has_unique_object_representations, is_aggregate): Add static_asserts
2561         to make sure that type traits are not misused with incomplete types.
2562         (__is_constructible_impl, __is_nothrow_default_constructible_impl)
2563         (__is_nothrow_constructible_impl, __is_nothrow_assignable_impl): New
2564         base characteristics without assertions that can be reused in other
2565         traits.
2566         * testsuite/20_util/is_complete_or_unbounded/memoization.cc: New test.
2567         * testsuite/20_util/is_complete_or_unbounded/memoization_neg.cc: New
2568         test.
2569         * testsuite/20_util/is_complete_or_unbounded/value.cc: New test.
2570         * testsuite/20_util/is_abstract/incomplete_neg.cc: New test.
2571         * testsuite/20_util/is_aggregate/incomplete_neg.cc: New test.
2572         * testsuite/20_util/is_class/value.cc: Check incomplete type.
2573         * testsuite/20_util/is_function/value.cc: Likewise.
2574         * testsuite/20_util/is_move_constructible/incomplete_neg.cc: New test.
2575         * testsuite/20_util/is_nothrow_move_assignable/incomplete_neg.cc: New
2576         test.
2577         * testsuite/20_util/is_polymorphic/incomplete_neg.cc: New test.
2578         * testsuite/20_util/is_reference/value.cc: Check incomplete types.
2579         * testsuite/20_util/is_unbounded_array/value.cc: Likewise.
2580         * testsuite/20_util/is_union/value.cc: Likewise.
2581         * testsuite/20_util/is_void/value.cc: Likewise.
2582         * testsuite/util/testsuite_tr1.h: Add incomplete union type.
2583
2584 2019-05-31  Jonathan Wakely  <jwakely@redhat.com>
2585
2586         * include/bits/random.h (random_device::_M_init(const char*, size_t)):
2587         Add new private member function.
2588         * src/c++11/cow-string-inst.cc (random_device::_M_init(const string&))
2589         (random_device::_M_init_pretr1(const string&)): Call new private
2590         member with string data.
2591         * src/c++11/random.cc (random_device::_M_init(const char*, size_t)):
2592         Define.
2593         * testsuite/26_numerics/random/random_device/cons/default-cow.cc: New
2594         test using COW strings.
2595         * testsuite/26_numerics/random/random_device/cons/default.cc: Generate
2596         a value from the device.
2597         * testsuite/26_numerics/random/random_device/cons/token.cc: Likewise.
2598         Fix typo in token string.
2599
2600 2019-05-30  Nina Dinka Ranns  <dinka.ranns@gmail.com>
2601
2602         LWG2788 basic_string spurious use of a default constructible allocator
2603         * include/bits/basic_string.tcc [_GLIBCXX_USE_CXX11_ABI]
2604         (basic_string::_M_replace_dispatch): Construct temporary string with
2605         the current allocator.
2606         * testsuite/21_strings/basic_string/allocator/char/lwg2788.cc: New.
2607         * testsuite/21_strings/basic_string/allocator/wchar_t/lwg2788.cc: New.
2608
2609 2019-05-30  Jonathan Wakely  <jwakely@redhat.com>
2610
2611         * doc/xml/manual/diagnostics.xml: Update list of headers that define
2612         exception classes.
2613         * doc/xml/manual/support.xml: Rewrite advice around NULL. Rewrite
2614         section about new/delete overloads. Improve section on verbose
2615         terminate handler.
2616         * doc/html/*: Regenerate.
2617
2618         * doc/xml/manual/status_cxx2020.xml: Add feature-test macro for
2619         P0811R3. Change status of P1353R0.
2620         * doc/html/*: Regenerate.
2621
2622         * doc/xml/manual/status_cxx2011.xml: Use <variablelist> for
2623         documentation of implementation-defined types for [thread.req.native].
2624         * doc/xml/manual/status_cxx2017.xml: Update documentation of
2625         implementation-defined strings for [variant.bad.access]. Fix typo in
2626         documentation of implementation-defined support for [fs.conform.9945].
2627         * doc/html/*: Regenerate.
2628
2629 2019-05-29  Jonathan Wakely  <jwakely@redhat.com>
2630
2631         PR libstdc++/85494
2632         * testsuite/26_numerics/random/random_device/cons/token.cc: Fix test
2633         that fails on mingw-w64.
2634
2635         PR libstdc++/88881
2636         * src/c++17/fs_ops.cc [_GLIBCXX_FILESYSTEM_IS_WINDOWS]
2637         (status(const path&, error_code&)): Use parent_path() to remove
2638         trailing slash.
2639         (symlink_status(const path&, error_code&)): Duplicate workaround for
2640         bug in _wstat for paths with trailing slash.
2641         * testsuite/27_io/filesystem/operations/remove_all.cc: Check path
2642         with trailing slash.
2643         * testsuite/27_io/filesystem/operations/status.cc: Likewise.
2644         * testsuite/27_io/filesystem/operations/symlink_status.cc: Likewise.
2645
2646         * src/c++17/fs_path.cc (path::parent_path()): Create whole path at
2647         once instead of building it iteratively.
2648
2649         * testsuite/util/testsuite_api.h: Remove names of unused parameters.
2650
2651         PR libstdc++/85494 use rdseed and rand_s in std::random_device
2652         * acinclude.m4 (GLIBCXX_CHECK_X86_RDSEED): Define macro to check if
2653         the assembler supports rdseed.
2654         * config.h.in: Regenerate.
2655         * configure: Regenerate.
2656         * configure.ac: Use GLIBCXX_CHECK_X86_RDSEED.
2657         * config/os/mingw32-w64/os_defines.h (_GLIBCXX_USE_CRT_RAND_S): Define.
2658         * doc/html/*: Regenerate.
2659         * doc/xml/manual/status_cxx2011.xml: Document new tokens.
2660         * include/bits/random.h (random_device::random_device()): Always call
2661         _M_init rather than _M_init_pretr1.
2662         (random_device::random_device(const string&)): Likewise.
2663         (random_device::operator()()): Always call _M_getval().
2664         (random_device::_M_file): Replace first member of union with an
2665         anonymous struct, with _M_file as its first member.
2666         * src/c++11/random.cc [_GLIBCXX_X86_RDRAND] (USE_RDRAND): Define.
2667         [_GLIBCXX_X86_RDSEED] (USE_RDSEED): Define.
2668         (USE_MT19937): Define if none of the above are defined.
2669         (USE_POSIX_FILE_IO): Define.
2670         (_M_strtoul): Remove.
2671         [USE_RDSEED] (__x86_rdseed): Define new function.
2672         [_GLIBCXX_USE_CRT_RAND_S] (__winxp_rand_s): Define new function.
2673         (random_device::_M_init(const string&)): Initialize new union members.
2674         Add support for "rdseed" and "rand_s" tokens. Decide what the
2675         "default" token does according to which USE_* macros are defined.
2676         [USE_POSIX_FILE_IO]: Store a file descriptor.
2677         [USE_MT19937]: Forward to _M_init_pretr1 instead.
2678         (random_device::_M_init_pretr1(const string&)) [USE_MT19937]: Inline
2679         code from _M_strtoul.
2680         [!USE_MT19937]: Call _M_init, transforming the old default token or
2681         numeric tokens to "default".
2682         (random_device::_M_fini()) [USE_POSIX_FILE_IO]: Use close not fclose.
2683         (random_device::_M_getval()): Use new union members to obtain a
2684         random number from the stored function pointer or file descriptor.
2685         [USE_MT19937]: Obtain a value from the mt19937 engine.
2686         (random_device::_M_getval_pretr1()): Call _M_getval().
2687         (random_device::_M_getentropy()) [USE_POSIX_FILE_IO]: Use _M_fd
2688         instead of fileno.
2689         [!USE_MT19937] (mersenne_twister): Do not instantiate when not needed.
2690         * testsuite/26_numerics/random/random_device/85494.cc: New test.
2691
2692 2019-05-28  Jonathan Wakely  <jwakely@redhat.com>
2693
2694         PR libstdc++/90634
2695         * include/experimental/bits/fs_path.h (path::path(path&&)): Only call
2696         _M_split_cmpts() for a path with multiple components.
2697         (path::_S_is_dir_sep()): Add missing 'static' keyword to function.
2698         * src/filesystem/path.cc (path::_M_split_cmpts()): Count number of
2699         components and reserve space in vector. Return early when there is
2700         only one component.
2701         * testsuite/27_io/filesystem/path/construct/90634.cc: New test.
2702         * testsuite/experimental/filesystem/path/construct/90634.cc: New test.
2703
2704         * testsuite/util/testsuite_fs.h (compare_paths): Use three-argument
2705         form of std::equals for C++11 compatibility.
2706
2707 2019-05-26  Gerald Pfeifer  <gerald@pfeifer.com>
2708
2709         * doc/xml/manual/appendix_contributing.xml: Update pointer to
2710         C++ standard at ansi.org.
2711
2712 2019-05-24  Jonathan Wakely  <jwakely@redhat.com>
2713
2714         * include/std/numeric (midpoint(T*, T*)): Fix incorrect result.
2715         * testsuite/26_numerics/midpoint/pointer.cc: Change "compile" test
2716         to "run".
2717
2718         * testsuite/20_util/shared_ptr/cons/alias-rval.cc: Fix test.
2719         * testsuite/20_util/shared_ptr/cons/alias.cc: Remove unused function.
2720
2721 2019-05-23  Jonathan Wakely  <jwakely@redhat.com>
2722
2723         * testsuite/20_util/function_objects/invoke/1.cc: Move C++17-specific
2724         tests to ...
2725         * testsuite/20_util/function_objects/invoke/3.cc: New test.
2726         * testsuite/23_containers/unordered_set/allocator/ext_ptr.cc: Change
2727         "compile" test to "run".
2728
2729         * doc/xml/manual/intro.xml: Document LWG DR 2996 change.
2730         * doc/html/*: Regenerate.
2731         * include/bits/shared_ptr.h (shared_ptr(shared_ptr&&, T*)): Add
2732         rvalue aliasing constructor.
2733         (static_pointer_cast, const_pointer, dynamic_pointer_cast)
2734         (reinterpret_pointer_cast): Add overloads taking rvalues.
2735         * include/bits/shared_ptr_base.h (__shared_ptr(__shared_ptr&&, T*)):
2736         Add rvalue aliasing constructor.
2737         * testsuite/20_util/shared_ptr/casts/1.cc: Change "compile" test to
2738         "run" and check return values as well as types.
2739         * testsuite/20_util/shared_ptr/casts/reinterpret.cc: Likewise.
2740         * testsuite/20_util/shared_ptr/casts/rval.cc: New test.
2741         * testsuite/20_util/shared_ptr/cons/alias-rval.cc: New test.
2742         * testsuite/20_util/shared_ptr/cons/alias.cc: Remove unused return
2743         values.
2744
2745         * doc/xml/manual/evolution.xml: Document LWG DR 2921 change.
2746         * doc/xml/manual/intro.xml: Likewise.
2747         * include/std/future (__create_task_state): Add default arguments
2748         to make providing an allocator optional.
2749         (packaged_task::packaged_task(F&&)): Call __create_task_state directly
2750         instead of delegating to another constructor.
2751         (packaged_task::packaged_task(allocator_arg_t, const A&, ...)): Do not
2752         define allocator-extended constructors for C++17 and later.
2753         * testsuite/30_threads/packaged_task/cons/alloc.cc: Only run test for
2754         C++11 and C++14.
2755         * testsuite/30_threads/packaged_task/cons/alloc2.cc: Likewise.
2756         * testsuite/30_threads/packaged_task/cons/alloc_min.cc: Likewise.
2757         * testsuite/30_threads/packaged_task/uses_allocator.cc: Likewise.
2758
2759 2019-05-23  Hans-Peter Nilsson  <hp@axis.com>
2760
2761         * testsuite/26_numerics/random/poisson_distribution/operators/values.cc:
2762         Don't run the libstdc++/83237 part on simulator targets.
2763
2764 2019-05-23  Jonathan Wakely  <jwakely@redhat.com>
2765
2766         * doc/xml/manual/status_cxx2017.xml: Add feature test macro for
2767         P0040R3.
2768         * doc/html/*: Regenerate.
2769
2770         * include/experimental/any (__any_caster): Use RTTI if comparing
2771         addresses fails, to support non-unique addresses in shared libraries.
2772         * include/std/any (__any_caster): Likewise.
2773
2774         PR libstdc++/90220
2775         * include/experimental/any (__any_caster): Constrain to only be
2776         callable for object types. Use remove_cv_t instead of decay_t.
2777         If the type decays or isn't copy constructible, compare the manager
2778         function to a dummy specialization.
2779         (__any_caster): Add overload constrained for non-object types.
2780         (any::_Manager_internal<_Op>): Add dummy specialization.
2781         * testsuite/experimental/any/misc/any_cast.cc: Test function types
2782         and array types.
2783
2784 2019-05-22  Jonathan Wakely  <jwakely@redhat.com>
2785
2786         PR libstdc++/90557
2787         * src/c++17/fs_path.cc (path::_List::operator=(const _List&)): Fix
2788         reversed arguments to uninitialized_copy_n.
2789         * testsuite/27_io/filesystem/path/assign/copy.cc: Check that source
2790         is unchanged by copy assignment.
2791         * testsuite/util/testsuite_fs.h (compare_paths): Use std::equal to
2792         compare path components.
2793
2794         PR libstdc++/77691
2795         * include/experimental/memory_resource: Add system header pragma and
2796         do not define anything unless compiled as C++14 or later.
2797         (__resource_adaptor_common::__guaranteed_alignment): Remove.
2798         (__resource_adaptor_imp::do_allocate): If the requested alignment
2799         is a fundamental alignment then either allocate directly from _M_alloc
2800         or call the new _M_allocate function.
2801         (__resource_adaptor_imp::do_deallocate): Likewise for deallocation.
2802         (__resource_adaptor_imp::_M_allocate): New function that uses a copy
2803         of the allocator rebound to a POD type with the specified alignment.
2804         (__resource_adaptor_imp::_M_deallocate): Likewise for deallocation.
2805         * testsuite/experimental/memory_resource/new_delete_resource.cc:
2806         Adjust expected allocation sizes.
2807         * testsuite/experimental/memory_resource/resource_adaptor.cc: Remove
2808         xfail for Solaris x86.
2809
2810 2019-05-21  Thomas Rodgers  <trodgers@redhat.com>
2811
2812         LWG 3062 - Unnecessary decay_t in is_execution_policy_v
2813         * include/pstl/execution_defs.h (__enable_if_execution_policy):
2814         Use std::__remove_cvref_t when building with GCC.
2815
2816 2019-05-21  Jonathan Wakely  <jwakely@redhat.com>
2817
2818         PR libstdc++/90252
2819         * testsuite/lib/libstdc++.exp (check_effective_target_tbb-backend):
2820         Use "additional_flags" to pass -ltbb to v3_target_compile command.
2821         Use check_v3_target_prop_cached to cache the result of the test.
2822
2823         * doc/xml/manual/shared_ptr.xml: Fix names of lock policy constants.
2824
2825 2019-05-20  Thomas Rodgers  <trodgers@redhat.com>
2826
2827         PR libstdc++/90252
2828         * testsuite/lib/libstdc++.exp (check_effective_target_tbb-backend):
2829         Changed v3_target_compile check from preprocess to executable.
2830         Added "-ltbb" to v3_target_compile flags.
2831
2832 2019-05-20  Thomas Rodgers  <trodgers@redhat.com>
2833
2834         * testsuite/lib/libstdc++.exp (check_effective_target_tbb-backend):
2835         Add check for Thread Building Blocks 2018 or later.
2836
2837 2019-05-20  Jonathan Wakely  <jwakely@redhat.com>
2838
2839         * testsuite/experimental/names.cc: Only include Networking TS headers
2840         on targets with the necessary Gthreads support.
2841
2842 2019-05-20  Marek Polacek  <polacek@redhat.com>
2843
2844         CWG 2094 - volatile scalars are trivially copyable.
2845         PR c++/85679
2846         * testsuite/20_util/is_trivially_copyable/value.cc: Change the expected
2847         result for volatile int.
2848
2849 2019-05-20  Jonathan Wakely  <jwakely@redhat.com>
2850
2851         * testsuite/17_intro/names.cc: Do not check 'ptr' on Solaris.
2852         * testsuite/experimental/names.cc: Include <experimental/filesystem>
2853         conditionally.
2854
2855         PR c++/90532 Ensure __is_constructible(T[]) is false
2856         * include/std/type_traits (__do_is_default_constructible_impl)
2857         (__is_default_constructible_atom, __is_default_constructible_safe):
2858         Remove.
2859         (is_default_constructible): Use is_constructible.
2860         * testsuite/20_util/is_constructible/value.cc: Check int[] case.
2861         * testsuite/20_util/is_default_constructible/value.cc: Likewise.
2862         * testsuite/20_util/is_trivially_constructible/value.cc: Likewise.
2863         * testsuite/20_util/is_trivially_default_constructible/value.cc:
2864         Likewise.
2865
2866 2019-05-20  Pádraig Brady  <pbrady@fb.com>
2867
2868         * libstdc++-v3/include/ext/new_allocator.h (deallocate): Pass the size
2869         to the deallocator with -fsized-deallocation.
2870
2871 2019-05-20  Jonathan Wakely  <jwakely@redhat.com>
2872
2873         * testsuite/experimental/memory_resource/new_delete_resource.cc: Fix
2874         test by passing correct alignment to deallocate function.
2875
2876 2019-05-18  Jonathan Wakely  <jwakely@redhat.com>
2877
2878         PR libstdc++/90520
2879         * python/libstdcxx/v6/printers.py (UniquePointerPrinter.__init__):
2880         Raise exception if unique_ptr tuple member has unknown structure.
2881         * python/libstdcxx/v6/xmethods.py (UniquePtrGetWorker.__call__):
2882         Adjust worker to support new __uniq_ptr_data base class. Do not
2883         assume field called _M_head_impl is the first tuple element.
2884
2885 2019-05-17  François Dumont  <fdumont@gcc.gnu.org>
2886
2887         * include/bits/stl_deque.h
2888         (_Deque_iterator<>::__ptr_to): Remove, use std::__ptr_rebind.
2889         (_Deque_base(_Deque_base&&, const allocator_type&)): New.
2890         (_Deque_base::_Deque_impl_data): New.
2891         (_Deque_base::_Deque_impl): Inherit latter.
2892         (_Deque_base::_Deque_impl::_M_swap_data): Move...
2893         (_Deque_base::_Deque_impl_data::_M_swap_data): ... here.
2894         (_Deque_base::_Deque_impl()): Add noexcept qualification.
2895         (_Deque_base::_Deque_impl(_Deque_impl&&, _Tp_alloc_type&&)): New.
2896         (_Deque_base::_Deque_impl::_M_get_Tp_allocator()): Remove static_cast.
2897         (deque<>::deque()): Default.
2898         (deque<>::deque(deque&&)): Default.
2899         (deque<>::deque(deque&&, const allocator_type&, false_type)): New.
2900         (deque<>::deque(deque&&, const allocator_type&, true_type)): New.
2901         (deque<>::deque(deque&&, const allocator_type&)): Delegate to latters.
2902         (deque<>::deque<_It>(_It, _It, const allocator_type&)): Use
2903         _M_range_initialize.
2904         (deque<>::assign<_It>(_It, _It)): Use _M_assign_aux.
2905         (deque<>::resize(size_type, const value_type&)): Share a single
2906         implementation.
2907         (deque<>::insert<_It>(const_iterator, _It, _It)): Use
2908         _M_range_insert_aux.
2909         [__cplusplus >= 201103L](_M_initialize_dispatch): Remove.
2910         [__cplusplus >= 201103L](_M_assign_dispatch): Remove.
2911         [__cplusplus >= 201103L](_M_insert_dispatch): Remove.
2912         * testsuite/23_containers/deque/allocator/default_init.cc: New.
2913
2914 2019-05-17  Jonathan Wakely  <jwakely@redhat.com>
2915
2916         PR libstdc++/90246
2917         * include/std/variant (holds_alternative, get, get_if): Improve
2918         static assertion messages.
2919         (bad_variant_access::bad_variant_access()): Change default message.
2920         (__throw_bad_variant_access(bool)): New overload.
2921         (get): Use new overload.
2922         (visit, visit<R>): Improve exception message.
2923
2924         * testsuite/20_util/variant/compile.cc: Fix narrowing test for ILP32
2925         targets. Add more cases from P0608R3.
2926         * testsuite/20_util/variant/run.cc: Add more cases from P0608R3.
2927
2928         * include/bits/random.h (seed_seq::param): Fix non-reserved name.
2929         * include/experimental/type_traits (is_detected_exact)
2930         (is_detected_exact_v): Likewise.
2931         * include/pstl/execution_defs.h (is_execution_policy)
2932         (is_execution_policy_v, __enable_if_execution_policy): Likewise.
2933         * include/pstl/execution_impl.h (__policy_traits): Likewise.
2934         * testsuite/17_intro/names.cc: Check for more non-reserved names.
2935         * testsuite/experimental/names.cc: New test.
2936
2937         PR libstdc++/85965
2938         * include/bits/hashtable.h (_Hashtable::~_Hashtable()): Remove static
2939         assertions from the destructor.
2940         * include/bits/hashtable_policy.h (_Hash_code_base::_M_hash_code):
2941         Move static_assert for hash function to here.
2942         (_Hash_table_base::_M_equals): Move static_assert for equality
2943         predicate to here.
2944         * include/bits/stl_tree.h (_Rb_tree::_S_value(_Const_Link_type)):
2945         Remove.
2946         (_Rb_tree::_S_key(_Const_Link_type)): Move assertions here. Access
2947         the value directly instead of calling _S_value.
2948         (_Rb_tree::_S_value(_Const_Base_ptr)): Remove.
2949         (_Rb_tree::_S_key(_Const_Base_ptr)): Do downcast and forward to
2950         _S_key(_Const_Link_type).
2951         * testsuite/23_containers/set/85965.cc: Check construction,
2952         destruction, assignment and size() do not trigger the assertions.
2953         * testsuite/23_containers/unordered_set/85965.cc: Likewise.
2954         * testsuite/23_containers/map/48101_neg.cc: Call find and adjust
2955         expected errors.
2956         * testsuite/23_containers/multimap/48101_neg.cc: Likewise.
2957         * testsuite/23_containers/multiset/48101_neg.cc: Likewise.
2958         * testsuite/23_containers/set/48101_neg.cc: Likewise.
2959         * testsuite/23_containers/unordered_map/48101_neg.cc: Likewise.
2960         * testsuite/23_containers/unordered_multimap/48101_neg.cc: Likewise.
2961         * testsuite/23_containers/unordered_multiset/48101_neg.cc: Likewise.
2962         * testsuite/23_containers/unordered_set/48101_neg.cc: Likewise.
2963
2964         * include/bits/invoke.h [__cplusplus < 201703L] (__invoke_r<void>):
2965         Use _GLIBCXX14_CONSTEXPR because void functions cannot be constexpr
2966         in C++11.
2967
2968         * doc/xml/manual/status_cxx2020.xml: Update P0608R3, P0777R1, and
2969         P1165R1 entries.
2970         * doc/html/*: Regenerate.
2971         * include/std/tuple (make_from_tuple): Use remove_reference_t instead
2972         of decay_t (P0777R1).
2973
2974 2019-05-17  François Dumont  <fdumont@gcc.gnu.org>
2975
2976         Move from state of allocators (LWG2593)
2977         * include/bits/stl_deque.h
2978         (_Deque_base(_Deque_base&&, false_type)): Remove.
2979         (_Deque_base(_Deque_base&&, true_type)): Remove.
2980         (_Deque_base(_Deque_base&&)): Adapt.
2981         (_Deque_base::_M_move_impl()): Remove.
2982         * testsuite/util/testsuite_allocator.h
2983         (propagating_allocator(propagating_allocator&&)): Preserve move from
2984         state.
2985         * testsuite/23_containers/deque/allocator/move_assign.cc (test02):
2986         Adapt.
2987         * testsuite/23_containers/forward_list/allocator/move_assign.cc (test02):
2988         Adapt.
2989         * testsuite/23_containers/list/allocator/move_assign.cc (test02): Adapt.
2990         * testsuite/23_containers/map/allocator/move_assign.cc (test02): Adapt.
2991         * testsuite/23_containers/multimap/allocator/move_assign.cc (test02):
2992         Adapt.
2993         * testsuite/23_containers/multiset/allocator/move_assign.cc (test02):
2994         Adapt.
2995         * testsuite/23_containers/set/allocator/move_assign.cc (test02): Adapt.
2996         * testsuite/23_containers/unordered_map/allocator/move_assign.cc
2997         (test02): Adapt.
2998         * testsuite/23_containers/unordered_multimap/allocator/move_assign.cc
2999         (test02): Adapt.
3000         * testsuite/23_containers/unordered_multiset/allocator/move_assign.cc
3001         (test02): Adapt.
3002         * testsuite/23_containers/unordered_set/allocator/move_assign.cc
3003         (test02): Adapt.
3004         * testsuite/23_containers/vector/allocator/move_assign.cc (test02):
3005         Adapt.
3006         * testsuite/23_containers/vector/bool/allocator/move_assign.cc (test02):
3007         Adapt.
3008         * testsuite/21_strings/basic_string/allocator/char/move_assign.cc
3009         (test02): Adapt.
3010         * testsuite/21_strings/basic_string/allocator/wchar_t/move_assign.cc
3011         (test02): Adapt.
3012
3013 2019-05-16  Jonathan Wakely  <jwakely@redhat.com>
3014
3015         * src/c++17/fs_ops.cc (absolute(const path&, error_code&))
3016         [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Remove bogus assertion.
3017
3018         * include/std/variant (__overload_set): Remove.
3019         (_Arr): New helper.
3020         (_Build_FUN): New class template to define a single FUN overload,
3021         with specializations to prevent unwanted conversions, as per P0608R3.
3022         (_Build_FUNs): New class template to build an overload set of FUN.
3023         (_FUN_type): New alias template to perform overload resolution.
3024         (__accepted_type): Use integer_constant base for failure case. Use
3025         _FUN_type for successful case.
3026         (variant::__accepted_index): Use _Tp instead of _Tp&&.
3027         (variant::variant(_Tp&&)): Likewise.
3028         (variant::operator=(_Tp&&)): Likewise.
3029
3030         * include/std/variant (_Variant_storage<false, _Types...>::_M_reset):
3031         Replace raw visitation with a runtime check for the valueless state
3032         and a non-raw visitor.
3033         (_Variant_storage<false, _Types...>::_M_reset_impl): Remove.
3034         (variant::index()): Remove branch.
3035         (variant::swap(variant&)): Use valueless_by_exception() instead of
3036         comparing the index to variant_npos, and add likelihood attribute.
3037
3038         * include/bits/hashtable_policy.h (_Equal_helper): Remove.
3039         (_Hashtable_base::_Equal_hash_code): Define new class template.
3040         (_Hashtable_base::_M_equals): Use _Equal_hash_code instead of
3041         _Equal_helper.
3042
3043         * include/bits/hashtable_policy.h (_Hashtable_ebo_helper::_S_get):
3044         Replace with _M_get non-static member function.
3045         (_Hashtable_ebo_helper::_S_cget): Replace with _M_cget non-static
3046         member function.
3047         (_Hash_code_base, _Local_iterator_base, _Hashtable_base):
3048         (_Hashtable_alloc): Adjust to use non-static members of EBO helper.
3049
3050         * include/bits/hashtable_policy.h (_Hash_code_base::_M_swap): Use
3051         _S_get accessors for members in EBO helpers.
3052         (_Hash_code_base::_M_extract(), _Hash_code_base::_M_ranged_hash())
3053         (_Hash_code_base::_M_h1(), _Hash_code_base::_M_h2()): Remove non-const
3054         overloads.
3055         (_Hashtable_base::_M_swap): Use _S_get accessors for members in EBO
3056         helpers.
3057         (_Hashtable_base::_M_eq()): Remove non-const overload.
3058
3059 2019-05-15  Jonathan Wakely  <jwakely@redhat.com>
3060
3061         * include/std/variant (visit, visit<R>): Qualify calls to __do_visit.
3062
3063 2019-05-14  Jonathan Wakely  <jwakely@redhat.com>
3064
3065         * testsuite/util/testsuite_allocator.h (NullablePointer::operator bool):
3066         Fix return value.
3067
3068 2019-05-14  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
3069
3070         * config/os/solaris/solaris2.10: Move to ...
3071         * config/os/solaris: ... this.
3072         * configure.host (os_include_dir): Adapt.
3073         (abi_baseline_pair): Remove Solaris 10 handling.
3074         * config/abi/post/i386-solaris2.10: Remove.
3075         * config/abi/post/sparc-solaris2.10: Remove.
3076         * config/abi/post/i386-solaris2.11: Rename to ...
3077         * config/abi/post/i386-solaris: ... this.
3078         * config/abi/post/sparc-solaris2.11: Rename to ...
3079         * config/abi/post/sparc-solaris: ... this.
3080
3081         * libsupc++/new_opa.cc [_GLIBCXX_HAVE_MEMALIGN] [__sun]: Remove
3082         workaround.
3083
3084         * testsuite/ext/enc_filebuf/char/13598.cc: Remove *-*-solaris2.10
3085         xfail.
3086
3087 2019-05-14  Jonathan Wakely  <jwakely@redhat.com>
3088
3089         * include/std/variant (__visit_with_index): Remove typedef.
3090         (__deduce_visit_result): New tag type.
3091         (__raw_visit, __raw_idx_visit): New helper functions for "raw"
3092         visitation of possibly-valueless variants, forwarding to __do_visit
3093         with the relevant tag type.
3094         (_Variant_storage<false, _Types...>::_M_reset_impl): Use __raw_visit
3095         and make lambda return void.
3096         (__variant_construct): Likewise.
3097         (_Copy_assign_base::operator=, _Move_assign_base::operator=): Use
3098         __raw_idx_visit and make lambda return void.
3099         (_Multi_array::__untag_result): Add metafunction to check the function
3100         pointer type for a tag type that dictates the kind of visitation.
3101         (_Multi_array<_Ret(*)(_Visitor, _Variants...), __first, __rest...>):
3102         Use decltype(auto) instead of tagged function pointer type.
3103         (__gen_vtable_impl): Remove bool non-type parameter and unused
3104         _Variant_tuple parameter.
3105         (__gen_vtable_impl::__visit_invoke_impl): Remove.
3106         (__gen_vtable_impl::__do_visit_invoke): Remove.
3107         (__gen_vtable_impl::__do_visit_invoke_r): Remove.
3108         (__gen_vtable_impl::__visit_invoke): Use if-constexpr and __invoke_r
3109         for the visit<R> case, rather than dispatching to separate functions.
3110         (_VARIANT_RELATION_FUNCTION_TEMPLATE): Use __raw_idx_visit and make
3111         lambda return void.
3112         (variant::swap): Likewise.
3113         (__do_visit): Replace two non-type template parameters with a single
3114         type parameter, so that the caller must specify the visitor's return
3115         type (or one of the tag types).
3116         (visit): Deduce a return type from the visitor and use the
3117         __deduce_visit_result tag to enforce that all overloads return the
3118         same type.
3119         (visit<R>): Call __do_visit<R> with explicit result type.
3120         (__variant_hash_call_base_impl::operator()): Use __raw_visit and make
3121         lambda return void.
3122
3123 2019-05-14  Nina Dinka Ranns  <dinka.ranns@gmail.com>
3124
3125         nonesuch is insufficiently useless (lwg2996)
3126         * include/std/type_traits (struct __nonesuch): Added private base
3127         class to make __nonesuch not an aggregate and removed deleted default
3128         constructor.
3129         * include/bits/stl_pair.h (struct __nonesuch_no_braces): Removed.
3130         (operator=(const pair&)): Use __nonesuch instead of
3131         __nonesuch_no_braces.
3132         (operator=(pair&&)): Likewise
3133         * include/std/tuple (operator=(const tuple&)): Use __nonesuch instead
3134         of __nonesuch_no_braces.
3135         (operator=(tuple&&)): Likewise
3136         * include/experimental/type_traits (struct nonesuch): Added private
3137         base class to make nonesuch not an aggregate and removed deleted
3138         default constructor.
3139         * testsuite/20_util/nonesuch/nonesuch.cc: New.
3140         * testsuite/experimental/type_traits/nonesuch.cc: New.
3141
3142 2019-05-14  Jonathan Wakely  <jwakely@redhat.com>
3143
3144         * include/bits/std_function.h (_Simple_type_wrapper): Remove.
3145         (_Function_handler): Remove partial specializations for void return
3146         types and pointers to member.
3147         (_Function_handler::_M_manager): Adapt to removal of
3148         _Simple_type_wrapper.
3149         (_Function_handler::_M_invoke): Use __invoke_r instead of __invoke.
3150         * include/std/functional (_Bind_result::__enable_if_void)
3151         (_Bind_result::__disable_if_void): Remove sfinae helpers.
3152         (_Bind_result::__call): Use __invoke_r and remove overloads for void
3153         return types.
3154         * include/std/future (__future_base::_Task_state::_M_run)
3155         (__future_base::_Task_state::_M_run_delayed): Use __invoke_r and
3156         change return type of lambda expressions.
3157
3158         * include/bits/invoke.h (__invoke_r): Define new function implementing
3159         the INVOKE<R> pseudo-function.
3160         * testsuite/20_util/function_objects/invoke/1.cc: Add more tests.
3161         * testsuite/20_util/function_objects/invoke/2.cc: New test.
3162
3163         * include/std/type_traits (__is_nt_convertible_helper): Define it
3164         unconditionally, not only for C++20.
3165         (__is_nothrow_convertible): Define internal trait for use in C++11.
3166         (__is_nt_invocable_impl: Fix by using __is_nothrow_convertible.
3167         (is_invocable_r_v, is_nothrow_invocable_r_v): Add missing parameter.
3168         * testsuite/20_util/is_nothrow_convertible/value_ext.cc: New test.
3169         * testsuite/20_util/is_nothrow_convertible/value.cc: Check with type
3170         that has nothrow explicit conversion but potentially-throwing implicit
3171         conversion.
3172         * testsuite/20_util/is_nothrow_invocable/value.cc: Likewise.
3173         * testsuite/20_util/is_nothrow_invocable/value_ext.cc: Fix helper
3174         function to only consider implicit conversions.
3175         * testsuite/20_util/tuple/cons/noexcept_specs.cc: Add comment.
3176
3177         * include/std/iterator: Include <iosfwd> instead of <istream> and
3178         <ostream>.
3179
3180         * include/bits/stl_tree.h (_Rb_tree::erase(const Key*, const Key*)):
3181         Remove unused, non-standard function.
3182
3183         * include/bits/regex.h (match_results::max_size()): Adjust return
3184         value to account for prefix/suffix/unmatched subs.
3185         (match_results::_M_resize(unsigned int)): Use _Base_type::assign to
3186         reset the contained sub matches.
3187         (match_results::_M_establish_failed_match(_Bi_iter)): Add new member
3188         function to set result state following a failed match.
3189         * include/bits/regex.tcc (__regex_algo_impl): Remove loop to set
3190         sub_match states after _M_resize. Use _M_establish_failed_match.
3191
3192         PR libstdc++/69724
3193         * include/std/thread (thread::_State_impl, thread::_S_make_state):
3194         Replace single _Callable parameter with variadic _Args pack, to
3195         forward them directly to the tuple of decayed copies.
3196         * testsuite/30_threads/thread/cons/69724.cc: New test.
3197
3198 2019-05-14  Nina Dinka Ranns  <dinka.ranns@gmail.com>
3199
3200         Inconsistency wrt Allocators in basic_string assignment (LWG2579)
3201         * include/bits/basic_string.h: (operator=(const basic_string&):
3202         Move allocator decision to assign.
3203         (assign(const basic_string&)): Move allocator decision here.
3204         * testsuite/21_strings/basic_string/allocator/char/copy_assign.cc:
3205         Add tests.
3206         * testsuite/21_strings/basic_string/allocator/wchar_t/copy_assign.cc:
3207         Add tests.
3208
3209 2019-05-14  Jonathan Wakely  <jwakely@redhat.com>
3210
3211         * testsuite/util/testsuite_allocator.h (memory_resource)
3212         (default_resource_mgr): Fix indentation.
3213
3214         * testsuite/20_util/allocator_traits/members/allocate_hint_nonpod.cc:
3215         Use operator-> to access raw pointer member.
3216         * testsuite/23_containers/vector/59829.cc: Likewise.
3217         * testsuite/23_containers/vector/bool/80893.cc: Likewise.
3218         * testsuite/libstdc++-prettyprinters/cxx11.cc: Use NullablePointer.
3219         * testsuite/util/testsuite_allocator.h (NullablePointer): New utility
3220         for tests.
3221         (PointerBase, PointerBase_void): Derive from NullablePointer and use
3222         its constructors and equality operators. Change converting
3223         constructors to use operator-> to access private member of the other
3224         pointer type.
3225         (PointerBase_void::operator->()): Add, for access to private member.
3226         (operator-(PointerBase, PointerBase)): Change to hidden friend.
3227         (operator==(PointerBase, PointerBase)): Remove.
3228         (operator!=(PointerBase, PointerBase)): Remove.
3229
3230         * python/libstdcxx/v6/printers.py (UniquePointerPrinter.__init__): Do
3231         not assume field called _M_head_impl is the first tuple element.
3232         * testsuite/libstdc++-prettyprinters/compat.cc: Make tuple
3233         implementation more accurate.
3234         * testsuite/libstdc++-prettyprinters/cxx11.cc: Check unique_ptr with
3235         empty pointer type and non-empty deleter.
3236
3237         LWG 2899 - Make is_move_constructible correct for unique_ptr
3238         * include/bits/unique_ptr.h (__uniq_ptr_impl): Add move constructor,
3239         move assignment operator.
3240         (__uniq_ptr_impl::release(), __uniq_ptr_impl::reset(pointer)): Add.
3241         (__uniq_ptr_data): New class template with conditionally deleted
3242         special members.
3243         (unique_ptr, unique_ptr<T[], D>): Change type of data member from
3244         __uniq_ptr_impl<T, D> to __uniq_ptr_data<T, D>. Define move
3245         constructor and move assignment operator as defaulted.
3246         (unique_ptr::release(), unique_ptr<T[], D>::release()): Forward to
3247         __uniq_ptr_impl::release().
3248         (unique_ptr::reset(pointer), unique_ptr<T[], D>::reset<U>(U)): Forward
3249         to __uniq_ptr_impl::reset(pointer).
3250         * python/libstdcxx/v6/printers.py (UniquePointerPrinter.__init__):
3251         Check for new __uniq_ptr_data type.
3252         * testsuite/20_util/unique_ptr/dr2899.cc: New test.
3253
3254 2019-05-13  Jonathan Wakely  <jwakely@redhat.com>
3255
3256         PR libstdc++/90454.cc path construction from void*
3257         * include/bits/fs_path.h (path::_Path): Use remove_pointer so that
3258         pointers to void are rejected as well as void.
3259         * include/experimental/bits/fs_path.h (path::_Path): Likewise.
3260         * testsuite/27_io/filesystem/path/construct/80762.cc: Also check
3261         pointers to void.
3262         * testsuite/experimental/filesystem/path/construct/80762.cc: Likewise.
3263
3264         * doc/xml/manual/policy_data_structures.xml: Comment out stray
3265         <remark> elements. Fix formatting of bibliography references.
3266
3267 2019-05-13  Edward Smith-Rowland  <3dw4rd@verizon.net>
3268
3269         * doc/xml/manual/status_cxx2020.xml: Document P0811R3 status.
3270
3271 2019-05-13  Jonathan Wakely  <jwakely@redhat.com>
3272
3273         Remove Profile Mode, deprecated since 7.1.0
3274         * doc/Makefile.am: Remove XML file for profile mode docs.
3275         * doc/Makefile.in: Regenerate.
3276         * doc/xml/authors.xml: Remove authors of profile mode docs.
3277         * doc/xml/manual/appendix_contributing.xml: Remove mention of profile
3278         mode.
3279         * doc/xml/manual/debug.xml: Likewise.
3280         * doc/xml/manual/evolution.xml: Document removal of profile mode.
3281         * doc/xml/manual/profile_mode.xml: Remove profile mode docs.
3282         * doc/xml/manual/spine.xml: Remove profile mode author credit.
3283         * doc/xml/manual/test.xml: Remove docs for dg-require-profile-mode
3284         directive.
3285         * doc/xml/manual/using.xml: Remove docs for profile mode headers and
3286         macro.
3287         * doc/html/*: Regenerate.
3288         * include/Makefile.am: Remove profile mode headers.
3289         * include/Makefile.in: Regenerate.
3290         * include/bits/c++config (std::__profile): Remove namespace.
3291         [_GLIBCXX_PROFILE]: Remove checks for macro.
3292         * include/profile/array: Remove.
3293         * include/profile/base.h: Remove.
3294         * include/profile/bitset: Remove.
3295         * include/profile/deque: Remove.
3296         * include/profile/forward_list: Remove.
3297         * include/profile/impl/profiler.h: Remove.
3298         * include/profile/impl/profiler_algos.h: Remove.
3299         * include/profile/impl/profiler_container_size.h: Remove.
3300         * include/profile/impl/profiler_hash_func.h: Remove.
3301         * include/profile/impl/profiler_hashtable_size.h: Remove.
3302         * include/profile/impl/profiler_list_to_slist.h: Remove.
3303         * include/profile/impl/profiler_list_to_vector.h: Remove.
3304         * include/profile/impl/profiler_map_to_unordered_map.h: Remove.
3305         * include/profile/impl/profiler_node.h: Remove.
3306         * include/profile/impl/profiler_state.h: Remove.
3307         * include/profile/impl/profiler_trace.h: Remove.
3308         * include/profile/impl/profiler_vector_size.h: Remove.
3309         * include/profile/impl/profiler_vector_to_list.h: Remove.
3310         * include/profile/iterator_tracker.h: Remove.
3311         * include/profile/list: Remove.
3312         * include/profile/map: Remove.
3313         * include/profile/map.h: Remove.
3314         * include/profile/multimap.h: Remove.
3315         * include/profile/multiset.h: Remove.
3316         * include/profile/ordered_base.h: Remove.
3317         * include/profile/set: Remove.
3318         * include/profile/set.h: Remove.
3319         * include/profile/unordered_base.h: Remove.
3320         * include/profile/unordered_map: Remove.
3321         * include/profile/unordered_set: Remove.
3322         * include/profile/vector: Remove.
3323         * scripts/run_doxygen: Do not process profile mode headers.
3324         * testsuite/23_containers/array/element_access/60497.cc: Don't use
3325         profile mode type.
3326         * testsuite/23_containers/array/specialized_algorithms/swap_cxx17.cc:
3327         Remove dg-skip-if for profile mode.
3328         * testsuite/23_containers/forward_list/capacity/1.cc: Remove
3329         preprocessor check for profile mode.
3330         * testsuite/23_containers/list/capacity/29134.cc: Likewise.
3331         * testsuite/23_containers/map/modifiers/extract.cc: Remove dg-skip-if
3332         for profile mode.
3333         * testsuite/23_containers/map/modifiers/insert_or_assign/1.cc:
3334         Likewise.
3335         * testsuite/23_containers/map/modifiers/try_emplace/1.cc: Likewise.
3336         * testsuite/23_containers/multimap/modifiers/extract.cc: Likewise.
3337         * testsuite/23_containers/multiset/modifiers/extract.cc: Likewise.
3338         * testsuite/23_containers/set/modifiers/extract.cc: Likewise.
3339         * testsuite/23_containers/unordered_map/modifiers/extract.cc:
3340         Likewise.
3341         * testsuite/23_containers/unordered_multimap/modifiers/extract.cc:
3342         Likewise.
3343         * testsuite/23_containers/unordered_multiset/modifiers/extract.cc:
3344         Likewise.
3345         * testsuite/23_containers/unordered_set/modifiers/extract.cc:
3346         Likewise.
3347         * testsuite/23_containers/vector/bool/capacity/29134.cc: Remove
3348         preprocessor check for profile mode.
3349         * testsuite/23_containers/vector/bool/modifiers/insert/31370.cc:
3350         Likewise.
3351         * testsuite/23_containers/vector/modifiers/insert_vs_emplace.cc:
3352         Remove dg-skip-if for profile mode.
3353         * testsuite/25_algorithms/binary_search/partitioned.cc: Likewise.
3354         * testsuite/25_algorithms/equal_range/partitioned.cc: Likewise.
3355         * testsuite/25_algorithms/lexicographical_compare/71545.cc: Likewise.
3356         * testsuite/25_algorithms/lower_bound/partitioned.cc: Likewise.
3357         * testsuite/25_algorithms/upper_bound/partitioned.cc: Likewise.
3358         * testsuite/Makefile.am: Remove profile_flags variable and
3359         * testsuite/Makefile.am: Remove profile_flags variable and
3360         check-profile target.
3361         * testsuite/Makefile.in: Regenerate.
3362         * testsuite/ext/profile/all.cc: Remove.
3363         * testsuite/ext/profile/mutex_extensions_neg.cc: Remove.
3364         * testsuite/ext/profile/profiler_algos.cc: Remove.
3365         * testsuite/ext/profile/replace_new.cc: Remove.
3366         * testsuite/ext/throw_allocator/deallocate_global.cc: Remove
3367         preprocessor check for profile mode.
3368         * testsuite/ext/throw_allocator/deallocate_local.cc: Likewise.
3369         * testsuite/lib/libstdc++.exp (check_v3_target_profile_mode): Remove.
3370         (check_v3_target_normal_mode): Do not check for profile mode macro.
3371         * testsuite/libstdc++-prettyprinters/80276.cc: Remove dg-skip-if for
3372         profile mode.
3373         * testsuite/libstdc++-prettyprinters/compat.cc: Likewise.
3374         * testsuite/libstdc++-prettyprinters/cxx11.cc: Likewise.
3375         * testsuite/libstdc++-prettyprinters/cxx17.cc: Likewise.
3376         * testsuite/libstdc++-prettyprinters/debug.cc: Likewise.
3377         * testsuite/libstdc++-prettyprinters/debug_cxx11.cc: Likewise.
3378         * testsuite/libstdc++-prettyprinters/libfundts.cc: Likewise.
3379         * testsuite/libstdc++-prettyprinters/simple.cc: Likewise.
3380         * testsuite/libstdc++-prettyprinters/simple11.cc: Likewise.
3381         * testsuite/libstdc++-prettyprinters/whatis.cc: Likewise.
3382         * testsuite/libstdc++-prettyprinters/whatis2.cc: Likewise.
3383
3384         Remove array_allocator extension, deprecated since 4.9.0
3385         * doc/xml/manual/allocator.xml: Remove documentation for
3386         array_allocator.
3387         * doc/xml/manual/evolution.xml: Document array_allocator removal.
3388         * doc/xml/manual/using.xml: Remove header from documentation.
3389         * include/Makefile.am: Remove <ext/array_allocator.h> header.
3390         * include/Makefile.in: Regenerate.
3391         * include/ext/array_allocator.h: Remove.
3392         * include/precompiled/extc++.h: Do not include removed header.
3393         * testsuite/ext/array_allocator/1.cc: Remove.
3394         * testsuite/ext/array_allocator/2.cc: Remove.
3395         * testsuite/ext/array_allocator/26875.cc: Remove.
3396         * testsuite/ext/array_allocator/3.cc: Remove.
3397         * testsuite/ext/array_allocator/check_deallocate_null.cc: Remove.
3398         * testsuite/ext/array_allocator/check_delete.cc: Remove.
3399         * testsuite/ext/array_allocator/check_new.cc: Remove.
3400         * testsuite/ext/array_allocator/variadic_construct.cc: Remove.
3401         * testsuite/ext/headers.cc: Do not include removed header.
3402
3403 2019-05-11  François Dumont  <fdumont@gcc.gnu.org>
3404
3405         * include/bits/stl_bvector.h
3406         (operator==(const _Bit_iterator_base&, const _Bit_iterator_base&)):
3407         Make hidden friend.
3408         (operator<(const _Bit_iterator_base&, const _Bit_iterator_base&)):
3409         Likewise.
3410         (operator!=(const _Bit_iterator_base&, const _Bit_iterator_base&)):
3411         Likewise.
3412         (operator>(const _Bit_iterator_base&, const _Bit_iterator_base&)):
3413         Likewise.
3414         (operator<=(const _Bit_iterator_base&, const _Bit_iterator_base&)):
3415         Likewise.
3416         (operator>=(const _Bit_iterator_base&, const _Bit_iterator_base&)):
3417         Likewise.
3418         (operator-(const _Bit_iterator_base&, const _Bit_iterator_base&)):
3419         Likewise.
3420         (_Bit_iterator::operator+(difference_type)): Likewise and allow NRVO
3421         copy elision.
3422         (_Bit_iterator::operator-(difference_type)): Likewise.
3423         (operator+(ptrdiff_t, const _Bit_iterator&)): Make hidden friend.
3424         (_Bit_const_iterator::operator+(difference_type)): Likewise and allow
3425         NRVO copy elision.
3426         (_Bit_const_iterator::operator-(difference_type)): Likewise.
3427         (operator+(ptrdiff_t, const _Bit_const_iterator&)): Make hidden friend.
3428
3429 2019-05-10  Jonathan Wakely  <jwakely@redhat.com>
3430
3431         PR libstdc++/81266
3432         * testsuite/util/thread/all.h: Do not use remove_pointer for
3433         std::thread::native_handle_type.
3434
3435         PR libstdc++/90397
3436         * include/std/variant (_Variant_storage<false, Types...>::_M_storage())
3437         (_Variant_storage<true, Types...>::_M_reset()))
3438         (_Variant_storage<true, Types...>::_M_storage())): Add noexcept.
3439         (__get_storage): Likewise.
3440         (variant): Add noexcept to friend declarations for __get and
3441         __get_storage.
3442
3443         PR libstdc++/90388
3444         * include/bits/unique_ptr.h (default_delete, default_delete<T[]>):
3445         Use _Require for constraints.
3446         (operator>(nullptr_t, const unique_ptr<T,D>&)): Implement exactly as
3447         per the standard.
3448         (__uniq_ptr_hash): New base class with conditionally-disabled call
3449         operator.
3450         (hash<unique_ptr<T,D>>): Derive from __uniq_ptr_hash.
3451         * testsuite/20_util/default_delete/48631_neg.cc: Adjust dg-error line.
3452         * testsuite/20_util/unique_ptr/hash/90388.cc: New test.
3453
3454         * include/bits/shared_ptr.h: Improve docs.
3455         * include/bits/shared_ptr_base.h: Likewise.
3456         * include/bits/stl_uninitialized.h: Likewise.
3457         * include/bits/unique_ptr.h: Likewise.
3458         * libsupc++/new: Likewise.
3459
3460 2019-05-09  François Dumont  <fdumont@gcc.gnu.org>
3461
3462         * include/bits/stl_deque.h
3463         (operator==(const _Deque_iterator<>&, const _Deque_iterator<>&)):
3464         Make hidden friend.
3465         (operator!=(const _Deque_iterator<>&, const _Deque_iterator<>&)):
3466         Likewise.
3467         (operator<(const _Deque_iterator<>&, const _Deque_iterator<>&)):
3468         Likewise.
3469         (operator<=(const _Deque_iterator<>&, const _Deque_iterator<>&)):
3470         Likewise.
3471         (operator>(const _Deque_iterator<>&, const _Deque_iterator<>&)):
3472         Likewise.
3473         (operator>=(const _Deque_iterator<>&, const _Deque_iterator<>&)):
3474         Likewise.
3475         (_Deque_iterator<>::operator+(difference_type)): Likewise and allow NRVO
3476         copy elision.
3477         (_Deque_iterator<>::operator-(difference_type)): Likewise.
3478
3479 2019-05-08  François Dumont  <fdumont@gcc.gnu.org>
3480
3481         PR libstdc++/90277
3482         * testsuite/23_containers/unordered_multiset/insert/24061-multiset.cc
3483         (test01): Reserve for number of insertions to avoid rehash during test.
3484         * testsuite/23_containers/unordered_multimap/insert/24061-multimap.cc
3485         (test01): Likewise.
3486         * testsuite/23_containers/unordered_multimap/insert/24061-multimap.cc
3487         (test01): Likewise.
3488         (test02): Likewise.
3489         (test03): Likewise.
3490
3491 2019-05-08  Jonathan Wakely  <jwakely@redhat.com>
3492
3493         * include/experimental/bits/fs_path.h: Improve docs.
3494         * include/experimental/bits/net.h: Fix wrong header name in comment.
3495         Do not document implementation details.
3496         * include/experimental/netfwd: Fix doxygen grouping.
3497
3498 2019-05-07  Jonathan Wakely  <jwakely@redhat.com>
3499
3500         * include/bits/stl_pair.h: Improve docs.
3501         * include/std/tuple: Likewise.
3502
3503         * doc/doxygen/doxygroups.cc (std::literals): Add documentation for
3504         inline namespace.
3505         * include/std/chrono: Improve docs.
3506         * include/std/ratio: Do not document implementation details.
3507         * testsuite/20_util/ratio/cons/cons_overflow_neg.cc: Adjust dg-error
3508         line numbers.
3509         * testsuite/20_util/ratio/operations/ops_overflow_neg.cc: Likewise.
3510
3511         PR libstdc++/89102
3512         * doc/xml/manual/intro.xml: Document DR 2408 and 2465 changes.
3513         * include/std/chrono (__duration_common_type_wrapper): Replace with ...
3514         (__duration_common_type): New helper.
3515         (common_type<chrono::duration<R1, P2>, chrono::duration<R2, P2>>): Use
3516         __duration_common_type.
3517         (__timepoint_common_type_wrapper): Replace with ...
3518         (__timepoint_common_type): New helper.
3519         (common_type<chrono::time_point<C, D2>, chrono::time_point<C, D2>>):
3520         Use __time_point_common_type.
3521         * include/std/type_traits (common_type<>): Define, as per LWG 2408.
3522         (__common_type_impl): If either argument is transformed by decay,
3523         use the common_type of the decayed types.
3524         (__common_type_impl<_Tp, _Up, _Tp, _Up>): If the types are already
3525         decayed, use __do_common_type_impl to get the common_type.
3526         (common_type<_Tp>): Use common_type<_Tp, _Tp>.
3527         (__do_member_type_wrapper, __member_type_wrapper)
3528         (__expanded_common_type_wrapper): Remove.
3529         (__common_type_pack, __common_type_fold): New helpers.
3530         (common_type<_Tp, _Up, _Vp...>): Use new helpers instead of
3531         __member_type_wrapper and __expanded_common_type_wrapper.
3532         * testsuite/20_util/common_type/requirements/explicit_instantiation.cc:
3533         Test zero-length template argument list.
3534         * testsuite/20_util/common_type/requirements/sfinae_friendly_1.cc:
3535         Test single argument cases and argument types that should decay.
3536         * testsuite/20_util/common_type/requirements/sfinae_friendly_2.cc:
3537         Adjust expected error.
3538         * testsuite/20_util/duration/literals/range_neg.cc: Use zero for
3539         dg-error lineno.
3540         * testsuite/20_util/duration/requirements/typedefs_neg1.cc: Likewise.
3541         * testsuite/20_util/duration/requirements/typedefs_neg2.cc: Likewise.
3542         * testsuite/20_util/duration/requirements/typedefs_neg3.cc: Likewise.
3543
3544         * doc/xml/manual/intro.xml: Fix DR 2537 and DR 2566 confusion.
3545
3546 2019-05-01  Nina Dinka Ranns  <dinka.ranns@gmail.com>
3547
3548         Make allocator propagation more consistent for
3549         operator+(basic_string) (P1165R1)
3550         * include/bits/basic_string.h
3551         (operator+(basic_string&&, basic_string&&): Changed resulting
3552         allocator to always be the one from the first parameter.
3553         * include/bits/basic_string.tcc
3554         (operator+(const _CharT*, const basic_string&)): Changed
3555         resulting allocator to be SOCCC on the second parameter's allocator.
3556         (operator+(_CharT, const basic_string&)): Likewise.
3557         * testsuite/21_strings/basic_string/allocator/char/operator_plus.cc:
3558         New.
3559         * testsuite/21_strings/basic_string/allocator/wchar_t/operator_plus.cc:
3560         New.
3561
3562 2019-05-07  Jonathan Wakely  <jwakely@redhat.com>
3563
3564         * include/bits/regex.h: Improve docs.
3565         * include/bits/regex.tcc: Do not document implementation details.
3566
3567         * testsuite/19_diagnostics/error_code/hash.cc: New test.
3568
3569 2019-05-06  François Dumont  <fdumont@gcc.gnu.org>
3570
3571         * python/libstdcxx/v6/printers.py (add_one_template_type_printer):
3572         Add type printer for container types in std::__debug namespace.
3573         * testsuite/lib/gdb-test.exp (whatis-regexp-test): New.
3574         (gdb-tests): Use distinct parameters for the type of test and use of
3575         regex.
3576         (gdb-test): Check for regex test even if 'whatis' test.
3577         * testsuite/libstdc++-prettyprinters/80276.cc: Adapt for _GLIBCXX_DEBUG
3578         mode.
3579         * testsuite/libstdc++-prettyprinters/cxx11.cc: Likewise.
3580         * testsuite/libstdc++-prettyprinters/cxx17.cc: Likewise.
3581         * testsuite/libstdc++-prettyprinters/libfundts.cc: Likewise.
3582         * testsuite/libstdc++-prettyprinters/simple.cc: Likewise.
3583         * testsuite/libstdc++-prettyprinters/simple11.cc: Likewise.
3584         * testsuite/libstdc++-prettyprinters/whatis.cc: Likewise.
3585         * testsuite/libstdc++-prettyprinters/whatis2.cc: Likewise.
3586
3587 2019-05-04  Jonathan Wakely  <jwakely@redhat.com>
3588
3589         * include/std/system_error (error_category): Fix comment.
3590
3591         PR libstdc++/90299
3592         * src/c++17/fs_ops.cc (absolute(const path&)): Report an error if the
3593         argument is an empty path.
3594         (absolute(const path&, error_code&)): Use invalid_argument as error
3595         code instead of no_such_file_or_directory.
3596         * testsuite/27_io/filesystem/operations/absolute.cc: Check handling
3597         of non-existent paths and empty paths with both overloads of absolute.
3598
3599         * include/std/system_error (error_category, error_code)
3600         (error_condition): Improve docs.
3601         * libsupc++/exception: Add missing @addtogroup Doxygen command.
3602         * libsupc++/exception_ptr.h (exception_ptr): Link equality operators
3603         to class documentation. Suppress documentation for implementation
3604         details.
3605         * libsupc++/nested_exception.h (throw_with_nested, rethrow_if_nested):
3606         Suppress documentation for implementation details.
3607
3608         * include/std/system_error (error_code): Remove friend declaration
3609         for hash<error_code>.
3610         (hash<error_code>::operator()): Use public member functions to access
3611         value and category.
3612         (hash<error_condition>::operator()): Use address of category, not
3613         its object representation.
3614         * src/c++11/compatibility-c++0x.cc (hash<error_code>::operator()):
3615         Use public member functions to access value and category.
3616         * testsuite/19_diagnostics/error_condition/hash.cc: New test.
3617
3618 2019-05-04  François Dumont  <fdumont@gcc.gnu.org>
3619
3620         * include/bits/hashtable.h (_Hashtable<>::rehash): Review comment.
3621         * include/bits/hashtable_policy.h
3622         (_Prime_rehash_policy::_M_bkt_for_elements): Use __builtin_ceill.
3623         (_Power2_rehash_policy::_M_bkt_for_elements): Likewise.
3624         (_Power2_rehash_policy::_M_next_bkt): Enforce returning a result not
3625         smaller than input value rather than always greater. Preserve
3626         _M_next_resize if called with 0 input. Use __builtin_floorl.
3627         (_Power2_rehash_policy::_M_need_rehash): Rehash only if number of
3628         elements + number of insertions is greater than _M_next_resize. Start
3629         with 11 buckets if not told otherwise. Use __builtin_floorl.
3630         (_Rehash_base<>::reserve): Use rehash policy _M_bkt_for_elements.
3631         * src/c++11/hashtable_c++0x.cc (_Prime_rehash_policy::_M_next_bkt):
3632         Preserve _M_next_resize if called with 0 input. Use __builtin_floorl.
3633         (_Prime_rehash_policy::_M_need_rehash): Start with 11 buckets if not
3634         told otherwise. Use __builtin_floorl.
3635         * testsuite/23_containers/unordered_set/hash_policy/71181.cc: Adapt test
3636         to also validate _Power2_rehash_policy.
3637         * testsuite/23_containers/unordered_set/hash_policy/power2_rehash.cc:
3638         Adapt.
3639
3640 2019-05-03  Jonathan Wakely  <jwakely@redhat.com>
3641
3642         PR libstdc++/61761
3643         * testsuite/26_numerics/complex/proj.cc: Don't assume <cmath> defines
3644         std::copysign.
3645
3646         PR libstdc++/52119
3647         * include/ext/numeric_traits.h (__glibcxx_min): Avoid integer
3648         overflow warning with -Wpedantic -Wsystem-headers.
3649
3650 2019-05-02  Jonathan Wakely  <jwakely@redhat.com>
3651
3652         PR libstdc++/90314
3653         * include/bits/c++config (_GLIBCXX_NOEXCEPT_IF): Use variadic macro.
3654         * include/bits/move.h (swap): Remove extra parentheses.
3655
3656         * include/experimental/bits/lfts_config.h: Improve doc markup.
3657         * include/experimental/optional: Improve docs.
3658         (_Has_addressof_mem, _Has_addressof_free, _Has_addressof)
3659         (__constexpr_addressof): Remove.
3660         (optional::operator->()): Use std::__addressof().
3661         * include/std/optional (optional::operator->()): Adjust whitespace.
3662         * testsuite/experimental/optional/constexpr/observers/2.cc: Check
3663         that operator-> is still constexpr with overloaded operator&. Change
3664         to compile-only test.
3665         * testsuite/experimental/optional/constexpr/observers/3.cc: Change to
3666         compile-only test.
3667
3668         * include/bits/shared_ptr.h: Improve docs.
3669         * include/bits/shared_ptr_atomic.h: Likewise.
3670         * include/bits/unique_ptr.h: Likewise. Adjust whitespace.
3671
3672         * include/bits/basic_string.h: Fix iterator/index confusion in
3673         Doxygen comments.
3674         * include/bits/range_access.h: Fix Doxygen warnings.
3675         * include/bits/refwrap.h: Do not document implementation details.
3676         (ref, cref): Group docs with reference_wrapper.
3677         * include/std/fstream: Fix Doxygen markup.
3678         * libsupc++/initializer_list (begin, end): Group docs with
3679         initializer_list.
3680
3681         * doc/doxygen/user.cfg.in: Set MARKDOWN_SUPPORT=YES.
3682
3683         * include/bits/unique_lock.h: Fix/improve doxygen markup.
3684         * include/std/mutex: Likewise.
3685         * include/std/shared_mutex: Likewise.
3686
3687         * include/bits/fs_dir.h: Fix/improve doxygen markup.
3688         * include/bits/fs_fwd.h: Likewise.
3689         * include/bits/fs_ops.h: Likewise.
3690         * include/bits/fs_path.h: Likewise.
3691         * include/std/filesystem: Likewise.
3692
3693         * include/experimental/bits/net.h: Fix/improve doxygen markup.
3694         * include/experimental/buffer: Likewise.
3695         * include/experimental/executor: Likewise.
3696         * include/experimental/internet: Likewise.
3697         * include/experimental/io_context: Likewise.
3698         * include/experimental/net: Likewise.
3699         * include/experimental/netfwd: Likewise.
3700         * include/experimental/socket: Likewise.
3701         * include/experimental/timer: Likewise.
3702
3703         * doc/doxygen/doxygroups.cc: Move description of experimental group
3704         here.
3705         * include/experimental/algorithm: Add to libfund-ts doc group.
3706         * include/experimental/any: Likewise. Do not document implementation
3707         details.
3708         * include/experimental/array: Add to libfund-ts doc group.
3709         * include/experimental/bits/lfts_config.h: Define libfund-ts doc group
3710         for Library Fundamentals.
3711         * include/experimental/chrono: Add to libfund-ts doc group.
3712         * include/experimental/deque: Likewise.
3713         * include/experimental/forward_list: Likewise.
3714         * include/experimental/functional: Likewise.
3715         * include/experimental/iterator: Likewise.
3716         * include/experimental/list: Likewise.
3717         * include/experimental/map: Likewise.
3718         * include/experimental/memory: Likewise.
3719         * include/experimental/memory_resource: Likewise. Improve docs.
3720         details.
3721         * include/experimental/numeric: Add to libfund-ts doc group.
3722         * include/experimental/optional: Likewise.
3723         * include/experimental/propagate_const: Likewise.
3724         * include/experimental/random: Likewise.
3725         * include/experimental/ratio: Likewise.
3726         * include/experimental/regex: Likewise.
3727         * include/experimental/set: Likewise.
3728         * include/experimental/source_location: Likewise.
3729         * include/experimental/string: Likewise.
3730         * include/experimental/string_view: Likewise.
3731         * include/experimental/system_error: Likewise.
3732         * include/experimental/tuple: Likewise.
3733         * include/experimental/type_traits: Likewise.
3734         * include/experimental/unordered_map: Likewise.
3735         * include/experimental/unordered_set: Likewise.
3736         * include/experimental/utility: Likewise.
3737         * include/experimental/vector: Likewise.
3738         * testsuite/experimental/any/misc/any_cast_neg.cc: Adjust dg-error.
3739         * testsuite/experimental/array/neg.cc: Adjust dg-error.
3740         * testsuite/experimental/propagate_const/assignment/move_neg.cc:
3741         Likewise.
3742         * testsuite/experimental/propagate_const/cons/move_neg.cc: Likewise.
3743         * testsuite/experimental/propagate_const/requirements2.cc: Likewise.
3744         * testsuite/experimental/propagate_const/requirements3.cc: Likewise.
3745         * testsuite/experimental/propagate_const/requirements4.cc: Likewise.
3746         * testsuite/experimental/propagate_const/requirements5.cc: Likewise.
3747
3748         * include/experimental/bits/fs_dir.h: Fix Doxygen markup.
3749         * include/experimental/bits/fs_fwd.h: Improve docs.
3750         * include/experimental/bits/fs_ops.h: fix Doxygen markup.
3751         * include/experimental/bits/fs_path.h: Likewise.
3752         (path, filesystem_error, u8path): Improve docs.
3753         * include/experimental/filesystem: Link to docs for TS.
3754
3755         * config/allocator/new_allocator_base.h (__allocator_base): Add
3756         workaround for Doxygen bug #6945.
3757         * include/std/memory: Improve docs. Define group for pointer safety.
3758         * include/std/scoped_allocator: Improve docs. Use "undocumented"
3759         conditional to suppress documentation for implementation details.
3760
3761         * include/bits/specfun.h: Improve docs.
3762         * include/tr1/cmath: Likewise. Fix nesting of preprocessor conditions
3763         and namespaces.
3764
3765         * doc/doxygen/doxygroups.cc (std::tr2, std::__gnu_cxx): Improve docs.
3766         (std::experimental): Add docs.
3767         * doc/doxygen/user.cfg.in (PREDEFINED): Expand macros for __cxx11
3768         namespace to nothing when generating docs.
3769         * include/bits/regex_constants.h (std::regex_constants): Improve docs.
3770         * include/std/chrono (std::chrono): Likewise.
3771         * include/std/functional (std::placeholders): Likewise.
3772         * include/std/thread (std::this_thread): Likewise.
3773
3774         * include/parallel/settings.h: Fix Doxygen markup.
3775
3776         * include/ext/pb_ds/detail/bin_search_tree_/*_imps.hpp: Do not define
3777         anything unless PB_DS_CLASS_C_DEC is defined.
3778         * include/ext/pb_ds/detail/binary_heap_/*_imps.hpp: Likewise.
3779         * include/ext/pb_ds/detail/binomial_heap_/*_imps.hpp: Likewise.
3780         * include/ext/pb_ds/detail/binomial_heap_base_/*_imps.hpp: Likewise.
3781         * include/ext/pb_ds/detail/cc_hash_table_map_/*_imps.hpp: Likewise.
3782         * include/ext/pb_ds/detail/gp_hash_table_map_/*_imps.hpp: Likewise.
3783         * include/ext/pb_ds/detail/hash_fn/*_imp.hpp: Likewise.
3784         * include/ext/pb_ds/detail/left_child_next_sibling_heap_/*_imps.hpp:
3785         Likewise.
3786         * include/ext/pb_ds/detail/list_update_map_/*_imps.hpp: Likewise.
3787         * include/ext/pb_ds/detail/ov_tree_map_/*_imps.hpp: Likewise.
3788         * include/ext/pb_ds/detail/pairing_heap_/*_imps.hpp: Likewise.
3789         * include/ext/pb_ds/detail/pat_trie_/*_imps.hpp: Likewise.
3790         * include/ext/pb_ds/detail/rb_tree_map_/*_imps.hpp: Likewise.
3791         * include/ext/pb_ds/detail/rc_binomial_heap_/*_imps.hpp: Likewise.
3792         * include/ext/pb_ds/detail/resize_policy*_imp.hpp: Likewise.
3793         * include/ext/pb_ds/detail/splay_tree_/*_imps.hpp: Likewise.
3794         * include/ext/pb_ds/detail/thin_heap_/*_imps.hpp: Likewise.
3795         * include/ext/pb_ds/detail/trie_policy*_imp.hpp: Likewise.
3796         * include/ext/pb_ds/detail/unordered_iterator/const_iterator.hpp:
3797         Likewise.
3798         * include/ext/pb_ds/detail/unordered_iterator/iterator.hpp: Likewise.
3799         * include/ext/pb_ds/detail/unordered_iterator/point_const_iterator.hpp:
3800         Likewise.
3801         * include/ext/pb_ds/detail/unordered_iterator/point_iterator.hpp:
3802         Likewise.
3803
3804         * doc/doxygen/user.cfg.in: Regenerate with Doxygen 1.8.14 and set
3805         GROUP_NESTED_COMPOUNDS=YES and SORT_BY_SCOPE_NAME=NO. Add various
3806         _GLIBCXX_xxx macros and __attribute__(X) to PREDEFINED macros that
3807         Doxygen expands.
3808
3809 2019-05-01  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
3810
3811         * config/abi/post/i386-solaris2.10/baseline_symbols.txt: Regenerate.
3812         * config/abi/post/i386-solaris2.10/amd64/baseline_symbols.txt: Likewise.
3813         * config/abi/post/i386-solaris2.11/baseline_symbols.txt: Likewise.
3814         * config/abi/post/i386-solaris2.11/amd64/baseline_symbols.txt: Likewise.
3815         * config/abi/post/sparc-solaris2.10/baseline_symbols.txt: Likewise.
3816         * config/abi/post/sparc-solaris2.10/sparcv9/baseline_symbols.txt:
3817         Likewise.
3818         * config/abi/post/sparc-solaris2.11/baseline_symbols.txt: Likewise.
3819         * config/abi/post/sparc-solaris2.11/sparcv9/baseline_symbols.txt:
3820         Likewise.
3821
3822 2019-05-01  Jonathan Wakely  <jwakely@redhat.com>
3823
3824         PR libstdc++/61761
3825         * include/std/complex (__complex_proj): Return parameter unchanged.
3826         [_GLIBCXX_USE_C99_COMPLEX] (__complex_proj): Change overloads for
3827         floating-point types to take std::complex arguments.
3828         [_GLIBCXX_USE_C99_MATH_TR1] (__complex_proj): Add overloads for
3829         floating-point types.
3830         * testsuite/26_numerics/complex/proj.cc: New test.
3831
3832 2019-04-30  Jakub Jelinek  <jakub@redhat.com>
3833
3834         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Change _Lock_policyE2 exports
3835         to _Lock_policyE[012].
3836         * config/abi/post/riscv64-linux-gnu/baseline_symbols.txt: Update.
3837
3838 2019-04-30  Jonathan Wakely  <jwakely@redhat.com>
3839
3840         * testsuite/27_io/filesystem/path/decompose/root_path.cc: Remove
3841         macros accidentally left in.
3842         * testsuite/27_io/filesystem/path/native/string-char8_t.cc: Remove
3843         unnecessary -lstdc++fs option. Fix test for mingw.
3844         * testsuite/experimental/filesystem/path/native/string-char8_t.cc:
3845         Fix test for mingw.
3846
3847 2019-04-30  Jakub Jelinek  <jakub@redhat.com>
3848
3849         * config/abi/post/riscv64-linux-gnu/baseline_symbols.txt: Update.
3850
3851 2019-04-29  Jonathan Wakely  <jwakely@redhat.com>
3852
3853         * include/bits/stl_algo.h (generate_n): Adjust doxygen comment.
3854
3855         * include/bits/move.h (swap(T&, T&), swap(T (&)[N], T (&)[N])): Use
3856         _GLIBCXX_NOEXCEPT_IF to simplify declarations.
3857
3858         PR libstdc++/71312
3859         * src/c++11/shared_ptr.cc (get_mutex): Align pool mutexes to 64 bytes.
3860
3861         * include/bits/stl_bvector.h (vector<bool>::empty()): Add nodiscard
3862         attribute.
3863
3864         * include/bits/stl_iterator_base_types.h (_Iter_base): Remove unused
3865         class template and partial specialization.
3866
3867         PR libstdc++/87982
3868         * include/bits/stl_algo.h (generate_n): Convert _Size parameter to
3869         an integral type.
3870         * include/bits/stl_algobase.h (__size_to_integer): New overloaded
3871         functions to convert a value to an integral type.
3872         (__fill_n_a, __fill_n_a): Assert that __n is already an integral type.
3873         (fill_n): Convert _Size parameter to an integral type.
3874         * testsuite/25_algorithms/fill_n/87982.cc: New test.
3875         * testsuite/25_algorithms/fill_n/87982_neg.cc: New test.
3876         * testsuite/25_algorithms/fill_n/dr426.cc: New test.
3877         * testsuite/25_algorithms/generate_n/87982.cc: New test.
3878         * testsuite/25_algorithms/generate_n/87982_neg.cc: New test.
3879         * testsuite/25_algorithms/generate_n/dr426.cc: New test.
3880
3881 2019-04-28  Nina Dinka Ranns  <dinka.ranns@gmail.com>
3882
3883         Adding noexcept-specification on tuple constructors (LWG 2899)
3884         * libstdc++-v3/include/std/tuple:
3885         (tuple()): Add noexcept-specification.
3886         (tuple(const _Elements&...)): Likewise
3887         (tuple(_UElements&&...)): Likewise
3888         (tuple(const tuple<_UElements...>&)): Likewise
3889         (tuple(tuple<_UElements...>&&)): Likewise
3890         (tuple(const _T1&, const _T2&)): Likewise
3891         (tuple(_U1&&, _U2&&)): Likewise
3892         (tuple(const tuple<_U1, _U2>&): Likewise
3893         (tuple(tuple<_U1, _U2>&&): Likewise
3894         (tuple(const pair<_U1, _U2>&): Likewise
3895         (tuple(pair<_U1, _U2>&&): Likewise
3896         * libstdc++-v3/testsuite/20_util/tuple/cons/noexcept_specs.cc: New
3897
3898 2019-04-27  Marc Glisse  <marc.glisse@inria.fr>
3899
3900         PR libstdc++/87106
3901         * include/bits/stl_uninitialized.h (__relocate_object_a): Mark the
3902         arguments with __restrict.
3903
3904 2019-04-26  H.J. Lu  <hongjiu.lu@intel.com>
3905
3906         * config/abi/post/x86_64-linux-gnu/x32/baseline_symbols.txt: Updated.
3907
3908 2019-04-26  Jonathan Wakely  <jwakely@redhat.com>
3909
3910         * include/experimental/bits/fs_path.h
3911         (path::_S_convert_loc<_InputIterator>): Create const std::string to
3912         avoid redundant call to _S_convert_loc with non-const pointers.
3913
3914         * testsuite/20_util/variant/run.cc: Use a new Hashable type to test
3915         hashing, because pmr::string depends on _GLIBCXX_USE_CXX11_ABI==1.
3916         * testsuite/21_strings/basic_string/hash/hash.cc
3917         [!_GLIBCXX_USE_CXX11_ABI]: Don't test pmr strings.
3918         * testsuite/21_strings/basic_string/hash/hash_char8_t.cc
3919         [!_GLIBCXX_USE_CXX11_ABI]: Likewise.
3920
3921         * config/abi/pre/gnu.ver (GLIBCXX_3.4): Replace wildcard that matches
3922         wstring::_M_replace_dispatch with more specific patterns.
3923         * include/bits/fs_path.h (path::_S_convert_loc<_InputIterator>):
3924         Create const std::string to avoid redundant call to _S_convert_loc
3925         with non-const pointers.
3926         * include/bits/locale_conv.h (__do_str_codecvt): Use if-constexpr to
3927         avoid unnecessary basic_string::assign instantiations.
3928
3929         * include/std/memory (__uses_alloc_args): Add string-literal to
3930         static_assert, to match the one in __uses_alloc.
3931         [__cpp_concepts] (_Std_pair): Use C++2a syntax for concept.
3932         * testsuite/20_util/polymorphic_allocator/construct_c++2a.cc: Check
3933         for recursive uses-allocator construction of nested pairs.
3934         * testsuite/20_util/scoped_allocator/construct_pair_c++2a.cc:: Add
3935         comment.
3936
3937 2019-04-26  Jakub Jelinek  <jakub@redhat.com>
3938
3939         * config/abi/post/s390x-linux-gnu/32/baseline_symbols.txt: Update.
3940         * config/abi/post/s390-linux-gnu/baseline_symbols.txt: Update.
3941         * config/abi/post/powerpc-linux-gnu/baseline_symbols.txt: Update.
3942         * config/abi/post/powerpc64-linux-gnu/32/baseline_symbols.txt: Update.
3943
3944         * config/abi/post/x86_64-linux-gnu/baseline_symbols.txt: Update.
3945         * config/abi/post/x86_64-linux-gnu/32/baseline_symbols.txt: Update.
3946         * config/abi/post/i386-linux-gnu/baseline_symbols.txt: Update.
3947         * config/abi/post/i486-linux-gnu/baseline_symbols.txt: Update.
3948         * config/abi/post/aarch64-linux-gnu/baseline_symbols.txt: Update.
3949         * config/abi/post/s390x-linux-gnu/baseline_symbols.txt: Update.
3950         * config/abi/post/powerpc64-linux-gnu/baseline_symbols.txt: Update.
3951
3952 2019-04-25  Jonathan Wakely  <jwakely@redhat.com>
3953
3954         PR libstdc++/90239
3955         * doc/xml/manual/status_cxx2020.xml: Amend P0591R4 status.
3956         * include/std/scoped_allocator [__cplusplus > 201703L]
3957         (scoped_allocator_adaptor::construct): Define in terms of
3958         uses_allocator_construction_args, as per P0591R4.
3959         * testsuite/20_util/scoped_allocator/construct_pair_c++2a.cc: New test.
3960         * testsuite/util/testsuite_allocator.h: Remove name of unused
3961         parameter.
3962
3963 2019-04-24  Jonathan Wakely  <jwakely@redhat.com>
3964
3965         * doc/xml/manual/status_cxx2017.xml: Document P0024R2 status.
3966         * doc/html/*: Regenerate.
3967
3968         * include/bits/fs_path.h (operator<, operator<=, operator>)
3969         (operator>=, operator==, operator!=): Make hidden friends, as per
3970         LWG 3065.
3971         * testsuite/27_io/filesystem/path/native/string-char8_t.cc: Fix
3972         string type in test.
3973         * testsuite/27_io/filesystem/path/native/string.cc: Likewise.
3974
3975         * include/std/any (any::any(ValueType&&)): Use __and_v.
3976         * include/std/numeric (midpoint(T, T, T), midpoint(T*, T*, T*)):
3977         Likewise.
3978
3979         * include/std/tuple (apply): Use remove_reference_t instead of decay_t
3980         as per P0777R1.
3981         * include/std/type_traits (__result_of_memfun): Use remove_reference
3982         instead of __remove_cvref_t and remove redundant is_same check.
3983         (__inv_unwrap): Use __remove_cvref_t instead of decay_t.
3984
3985         * include/experimental/string_view (basic_string_view::pointer)
3986         (basic_string_view::reference): Fix to refer to non-const value_type.
3987         * include/bits/basic_string.h (basic_string): Use __sv_check and
3988         __sv_limit instead of basic_string_view::_M_check and
3989         basic_string_view::_M_limit.
3990         * include/std/string_view (__sv_check, __sv_limit): New
3991         helper functions to replace basic_string_view::_M_check and
3992         basic_string_view::_M_limit.
3993         (basic_string_view): Add static assertions to enforce ill-formed
3994         requirement for traits_type::char_type from P1148R0, and to enforce
3995         required properties of char-like types.
3996         (basic_string_view::pointer, basic_string_view::reference): Fix to
3997         refer to non-const value_type.
3998         (basic_string_view::operator[], basic_string_view::at)
3999         (basic_string_view::front, basic_string_view::back)
4000         (basic_string_view::data): Use const_reference and const_pointer
4001         typedefs for return types.
4002         (basic_string_view::_M_check, basic_string_view::_M_limit): Remove.
4003         (hash<wstring_view>): Fix argument_type typedef.
4004         * testsuite/21_strings/basic_string_view/modifiers/remove_prefix/
4005         char/1.cc: Fix expected return type of basic_string_view::data().
4006         * testsuite/21_strings/basic_string_view/modifiers/remove_prefix/
4007         wchar_t/1.cc: Likewise.
4008         * testsuite/21_strings/basic_string_view/modifiers/remove_suffix/
4009         char/1.cc: Likewise.
4010         * testsuite/21_strings/basic_string_view/modifiers/remove_suffix/
4011         wchar_t/1.cc: Likewise.
4012         * testsuite/21_strings/basic_string_view/requirements/traits_neg.cc:
4013         New test.
4014         * testsuite/21_strings/basic_string_view/requirements/typedefs.cc:
4015         Check reference and pointer typedefs.
4016         * testsuite/experimental/string_view/requirements/typedefs.cc:
4017         Likewise.
4018         * testsuite/experimental/string_view/modifiers/remove_prefix/char/1.cc:
4019         Fix expected return type of basic_string_view::data().
4020         * testsuite/experimental/string_view/modifiers/remove_prefix/wchar_t/
4021         1.cc: Likewise.
4022         * testsuite/experimental/string_view/modifiers/remove_suffix/char/1.cc:
4023         Likewise.
4024         * testsuite/experimental/string_view/modifiers/remove_suffix/wchar_t/
4025         1.cc: Likewise.
4026
4027         PR libstdc++/90220
4028         * include/std/any (__any_caster): Use remove_cv_t instead of decay_t.
4029         Avoid a runtime check for types that can never be stored in std::any.
4030         * testsuite/20_util/any/misc/any_cast.cc: Test std::any_cast with
4031         array types.
4032
4033         PR libstdc++/90220 (partial)
4034         * include/std/any (any_cast<T>(any*), any_cast<T>(const any*)): Do
4035         not attempt ill-formed static_cast to pointers to non-object types.
4036         * testsuite/20_util/any/misc/any_cast.cc: Test std::any_cast with
4037         function types.
4038
4039         * testsuite/20_util/variant/run.cc: Catch exception by reference to
4040         prevent -Wcatch-value warning.
4041
4042         * include/std/variant (__variant_construct): Use template parameter
4043         type instead of equivalent decltype-specifier.
4044         (_Move_ctor_base<false, Types...>::_Move_ctor_base(_Move_ctor_base&&)):
4045         Replace forward with move.
4046         (_Move_ctor_base<false, Types...>::_M_destructive_move)
4047         (_Move_ctor_base<false, Types...>::_M_destructive_copy)
4048         (_Move_ctor_base<true, Types...>::_M_destructive_move)
4049         (_Move_ctor_base<true, Types...>::_M_destructive_copy): Only set the
4050         index after construction succeeds.
4051         (_Copy_assign_base<false, Types...>::operator=): Remove redundant
4052         if-constexpr checks that are always true. Use __remove_cvref_t instead
4053         of remove_reference so that is_nothrow_move_constructible check
4054         doesn't use a const rvalue parameter. In the potentially-throwing case
4055         construct a temporary and move assign it, as per LWG 2904.
4056         (_Move_assign_base<false, Types...>::operator=): Remove redundant
4057         if-constexpr checks that are always true. Use emplace as per LWG 2904.
4058         (variant::operator=(T&&)): Only use emplace conditionally, otherwise
4059         construct a temporary and move assign from it, as per LWG 2904.
4060         * testsuite/20_util/variant/exception_safety.cc: Check that
4061         assignment operators have strong exception safety guarantee.
4062
4063 2019-04-23  Thomas Rodgers <trodgers@redhat.com>
4064
4065         Document PSTL linker flags
4066
4067         * doc/xml/manual/using.xml: Add PSTL linker flags to table 3.1.
4068
4069 2019-04-23  Jonathan Wakely  <jwakely@redhat.com>
4070
4071         * include/std/variant (__detail::__variant::_Traits): Make
4072         _S_trivial_copy_assign depend on _S_trivial_copy_ctor and make
4073         _S_trivial_move_assign depend on _S_trivial_move_ctor, as per
4074         P0602R4.
4075         (__detail::__variant::_Copy_assign_alias): Only depend on
4076         _S_trivial_copy_assign, which subsumes _S_trivial_copy_ctor now.
4077         * testsuite/20_util/variant/compile.cc: Correct checks for trivial
4078         move assignment operators.
4079
4080         PR libstdc++/90165
4081         * include/std/variant (variant::__not_self): New helper for the
4082         is_same_v<remove_cvref_t<T>, variant>==false constraints.
4083         (variant::__to_type_impl): Remove.
4084         (variant::__to_type): Add default argument to check pack size, instead
4085         of using __to_type_impl.
4086         (variant::__accepted_type): Add default argument using __not_self.
4087         (variant::__is_in_place_tag, variant::__not_in_place_tag): New helpers
4088         for variant(T&&) constructor constraint.
4089         (variant::variant(T&&)): Use __not_in_place_tag in constraints.
4090         Extract __accepted_type into a named template parameter for reuse in
4091         other constraints and in the exception specification.
4092         (variant::variant(in_place_type_t<T>, Args&&...))
4093         (variant::variant(in_place_type_t<T>, initializer_list<U>, Args&&...))
4094         (variant::variant(in_place_index_t<T>, Args&&...))
4095         (variant::variant(in_place_index_t<T>, initializer_list<U>, Args&&...))
4096         (variant::operator=T&&)): Remove redundant && from trait arguments.
4097         * testsuite/20_util/variant/compile.cc: Check variant(T&&) constructor
4098         isn't used for in_place_type or in_place_index arguments.
4099
4100         * include/std/type_traits (unwrap_reference_t): Define for C++2a.
4101         (unwrap_ref_decay): Remove inheritance from unwrap_reference.
4102         * testsuite/20_util/unwrap_reference/1.cc: Adjust test to use alias.
4103
4104 2019-04-23  Ramana Radhakrishnan  <ramana.radhakrishnan@arm.com>
4105             Bernd Edlinger  <bernd.edlinger@hotmail.de>
4106             Jakub Jelinek  <jakub@redhat.com>
4107
4108         PR target/89093
4109         * libsupc++/eh_personality.cc (PERSONALITY_FUNCTION): Add
4110         general-regs-only target attribute for ARM.
4111
4112 2019-04-23  Jonathan Wakely  <jwakely@redhat.com>
4113
4114         PR libstdc++/87431
4115         * include/bits/basic_string.h (_Never_valueless_alt): Make partial
4116         specialization also depend on is_nothrow_move_constructible.
4117         * include/std/variant (__detail::__variant::__never_valueless()):
4118         Only true if the variant would have a move assignment operator.
4119         (__detail::__variant::_Variant_storage<false, T...>::_M_valid()):
4120         Check __never_valueless<T...>().
4121         (variant::emplace): Only perform non-throwing move assignments
4122         for never-valueless alternatives if the variant has a move assignment
4123         operator.
4124         * testsuite/20_util/variant/compile.cc: Check that never-valueless
4125         types can be emplaced into non-assignable variants.
4126         * testsuite/20_util/variant/run.cc: Check that never-valueless types
4127         don't get copied when emplaced into non-assignable variants.
4128
4129         * include/std/variant (__detail::__variant::__ref_cast): Remove
4130         unused function.
4131         (__detail::__variant::_Uninitialized::_M_get)
4132         (__detail::__variant::__get)
4133         (__gen_vtable_impl::__element_by_index_or_cookie): Add noexcept.
4134
4135 2019-04-21  Iain Sandoe  <iain@sandoe.co.uk>
4136
4137         * testsuite/17_intro/headers/c++1998/charset.cc: Skip for Darwin8
4138         to Darwin10.
4139         * testsuite/17_intro/headers/c++2011/charset.cc: Likewise.
4140         * testsuite/17_intro/headers/c++2014/charset.cc: Likewise.
4141         * testsuite/17_intro/headers/c++2017/charset.cc: Likewise.
4142         * testsuite/17_intro/headers/c++2020/charset.cc: Likewise.
4143
4144 2019-04-20  Thomas Rodgers <trodgers@redhat.com>
4145
4146         Delegate PSTL configuration to pstl/pstl_config.h
4147
4148         * include/bits/c++config: Remove explicit PSTL configuration
4149         macros and use definitions from <pstl/pstl_config.h>.
4150
4151 2019-04-20  Thomas Rodgers <trodgers@redhat.com>
4152
4153         Cleanup algorithm implementations
4154         * include/pstl/glue_algorithm_impl.h (stable_sort): Forward
4155         execution policy.
4156         (mismatch): Forward execution policy.
4157         (equal): Qualify call to std::equal().
4158         (partial_sort): Forward execution policy.
4159         (inplace_merge): Forward execution policy.
4160
4161 2019-04-19  Thomas Rodgers <trodgers@redhat.com>
4162
4163         Improve implementation of parallel equal()
4164         * include/pstl/algorithm_impl.h
4165         (__internal::__brick_equal): use "4 iterator" version of
4166         std::equal().
4167         (__internal::__brick_equal): use simd for random access
4168         iterators on unsequenced execution policies.
4169         (__internal::__pattern_equal): add "4 iterator" version
4170         (__internal::__pattern_equal): dispatch to simd __brick_equal
4171         for vector-only execution policies.
4172         (__internal::__pattern_equal): dispatch to __parallel_or for
4173         parallel execution policies.
4174         * include/pstl/glue_algorithm_impl.h
4175         (std::equal): dispatch to "4 iterator" version of
4176         __internal::__pattern_equal().
4177
4178 2019-04-17  Jonathan Wakely  <jwakely@redhat.com>
4179
4180         PR libstdc++/90105
4181         * include/bits/forward_list.h (operator==): Do not use operator!= to
4182         compare elements.
4183         (forward_list<T, A>::sort(Comp)): When elements are equal take the one
4184         earlier in the list, so that sort is stable.
4185         * testsuite/23_containers/forward_list/operations/90105.cc: New test.
4186         * testsuite/23_containers/forward_list/comparable.cc: Test with
4187         types that meet the minimum EqualityComparable and LessThanComparable
4188         requirements. Remove irrelevant comment.
4189
4190         * include/std/variant (__detail::__variant::_Traits::_S_copy_assign):
4191         Do not depend on whether all alternative types are move constructible.
4192         (__detail::__variant::_Copy_assign_base::operator=): Remove cv-quals
4193         from the operand when deciding whether to perform the assignment.
4194         * testsuite/20_util/variant/compile.cc (DeletedMoves): Define type
4195         with deleted move constructor and deleted move assignment operator.
4196         (default_ctor, copy_ctor, move_ctor, copy_assign, move_assign): Check
4197         behaviour of variants with DeletedMoves as an alternative.
4198         * testsuite/20_util/variant/run.cc (DeletedMoves): Define same type.
4199         (move_ctor, move_assign): Check that moving a variant with a
4200         DeletedMoves alternative falls back to copying instead of moving.
4201
4202         * testsuite/20_util/variant/compile.cc: Remove empty string literals
4203         from static_assert declarations.
4204
4205         * testsuite/20_util/variant/compile.cc (MoveCtorOnly): Fix type to
4206         actually match its name.
4207         (MoveCtorAndSwapOnly): Define new type that adds swap to MoveCtorOnly.
4208         (test_swap()): Fix result for MoveCtorOnly and check
4209         MoveCtorAndSwapOnly.
4210
4211         * include/std/optional (optional::value_or(U&&) &&): Add missing
4212         constexpr specifier.
4213         * testsuite/20_util/optional/constexpr/observers/4.cc: Check value_or
4214         for disengaged optionals and rvalue optionals.
4215         * testsuite/20_util/optional/observers/4.cc: Likewise.
4216
4217 2019-04-12  Thomas Rodgers  <trodgers@redhat.com>
4218
4219         * include/pstl/algorithm_impl.h: Uglify identfiers.
4220         * include/pstl/numeric_impl.h:  Uglify identfiers.
4221         * include/pstl/parallel_backend_tbb.h: Uglify identfiers.
4222
4223 2019-04-11  Thomas Rodgers  <trodgers@redhat.com>
4224
4225         * include/bits/c++config:
4226         Add definition for __PSTL_ASSERT.
4227         Add definition for __PSTL_ASSERT_MSG.
4228         * include/pstl/algorithm_impl.h: Replace use of assert().
4229         * include/pstl/numeric_impl.h: Replace use of assert().
4230         * include/pstl/parallel_backend_tbb.h:
4231         Replace use of assert().
4232         Replace use of __TBB_ASSERT().
4233         * include/pstl/parallel_backend_utils.h: Replace use of assert().
4234
4235 2019-04-11  Jonathan Wakely  <jwakely@redhat.com>
4236
4237         PR libstdc++/90046
4238         * src/c++17/memory_resource.cc
4239         (monotonic_buffer_resource::_Chunk::allocate): Increase alignment if
4240         needed to allow placing a _Chunk at the end of the buffer.
4241         (monotonic_buffer_resource::_M_new_buffer): Remove static_assert.
4242
4243 2019-04-10  Jonathan Wakely  <jwakely@redhat.com>
4244
4245         * doc/xml/faq.xml: Add information about emergency EH pool.
4246         * doc/xml/manual/debug.xml: Update list of memory debugging tools.
4247         Move outdated information on mt_allocator to a separate section.
4248         * doc/xml/manual/evolution.xml: Clarify that GLIBCXX_FORCE_NEW
4249         doesn't affect the default allocator.
4250
4251         * testsuite/lib/libstdc++.exp (check_v3_target_parallel_mode): Fix
4252         typo.
4253
4254         PR libstdc++/89851
4255         * testsuite/20_util/variant/89851.cc: New test.
4256
4257 2019-04-09  Jonathan Wakely  <jwakely@redhat.com>
4258
4259         * include/std/variant: Adjust whitespace. Add comments.
4260         (_Multi_array): Leave primary template undefined.
4261         (_Multi_array<_Tp>): Define partial specialization for base case of
4262         recursion.
4263         (__gen_vtable_impl, __gen_vtable): Remove redundant && from type
4264         which is always a reference.
4265         (__gen_vtable::_S_apply()): Remove function, inline body into
4266         default member initializer.
4267         * testsuite/20_util/variant/visit.cc: Test with noncopyable types.
4268
4269         * include/std/variant (__variant_idx_cookie): Add member type.
4270         (__visitor_result_type): Remove.
4271         (__do_visit): Use invoke_result instead of __visitor_result_type.
4272         * testsuite/20_util/variant/visit.cc: New test.
4273
4274         PR libstdc++/90008
4275         * include/std/variant (_VARIANT_RELATION_FUNCTION_TEMPLATE): Remove
4276         unused capture.
4277         * testsuite/20_util/variant/90008.cc: New test.
4278
4279 2019-04-09  Thomas Rodgers  <trodgers@redhat.com>
4280
4281         * include/pstl/algorithm_impl.h: Add namespace qualification.
4282         * include/pstl/execution_defs.h: Add namespace qualification.
4283         * include/pstl/execution_impl.h: Add namespace qualification.
4284         * include/pstl/numeric_impl.h: Add namespace qualification.
4285         * include/pstl/parallel_backend_tbb.h: Add namespace qualification.
4286         * include/pstl/unseq_backend_simd.h: Add namespace qualification.
4287         * include/pstl/parallel_backend_utils.h: Include <cassert>.
4288
4289 2019-04-08  Ville Voutilainen  <ville.voutilainen@gmail.com>
4290
4291         Fix visit<R> for variant.
4292         * include/std/variant (__do_visit): Add a template parameter
4293         for enforcing same return types for visit.
4294         (__gen_vtable_impl): Likewise.
4295         (_S_apply_single_alt): Adjust.
4296         (__visit_invoke_impl): New. Handle casting to void.
4297         (__do_visit_invoke): New. Enforces same return types.
4298         (__do_visit_invoke_r): New. Converts return types.
4299         (__visit_invoke): Adjust.
4300         (__gen_vtable):  Add a template parameter for enforcing
4301         same return types for visit.
4302         * testsuite/20_util/variant/visit_r.cc: Add a test for a visitor with
4303         different return types.
4304         * testsuite/20_util/variant/visit_neg.cc: New. Ensures that
4305         visitors with different return types don't accidentally
4306         compile with regular visitation.
4307
4308 2019-04-08  Christophe Lyon  <christophe.lyon@linaro.org>
4309
4310         * testsuite/27_io/filesystem/iterators/caching.cc: Add
4311         dg-require-filesystem-ts.
4312
4313 2019-04-05  Jonathan Wakely  <jwakely@redhat.com>
4314
4315         * doc/xml/manual/status_cxx2020.xml: Update status.
4316         * include/std/variant (visit<R>): Define for C++2a (P0655R1).
4317         * testsuite/20_util/variant/visit_r.cc: New test.
4318
4319         * include/bits/fs_dir.h (directory_iterator::operator*)
4320         (directory_iterator::operator->): Add noexcept.
4321         (operator==, operator!=): Replace namespace-scope equality operators
4322         for directory iterators with hidden friends.
4323
4324         PR libstdc++/89986
4325         * config/abi/pre/gnu.ver: Add missing exports.
4326         * testsuite/27_io/filesystem/iterators/directory_iterator.cc: Test
4327         increment member.
4328
4329         * config/abi/pre/gnu.ver: Export new symbols.
4330         * include/bits/fs_dir.h (recursive_directory_iterator::options())
4331         (recursive_directory_iterator::recursion_pending())
4332         (recursive_directory_iterator::disable_recursion_pending()): Remove
4333         inline definitions. Make noexcept.
4334         (recursive_directory_iterator::depth())
4335         (recursive_directory_iterator::operator*())
4336         (recursive_directory_iterator::operator->()): Make noexcept.
4337         (recursive_directory_iterator::_M_options)
4338         (recursive_directory_iterator::_M_pending): Remove data members.
4339         * src/c++17/fs_path.cc (_Dir_stack): Add constructor and data members.
4340         (recursive_directory_iterator::recursive_directory_iterator): Remove
4341         ctor-initializer. Use new constructor for _Dir_stack.
4342         (recursive_directory_iterator::options())
4343         (recursive_directory_iterator::recursion_pending())
4344         (recursive_directory_iterator::disable_recursion_pending()): Add
4345         non-inline definitions.
4346         (recursive_directory_iterator::depth()): Make noexcept.
4347         (recursive_directory_iterator::increment(error_code&))
4348         (recursive_directory_iterator::pop(error_code&)): Adjust to new
4349         location of options and recursion_pending members.
4350         * testsuite/27_io/filesystem/iterators/recursion_pending.cc: New test.
4351         * testsuite/util/testsuite_fs.h (__gnu_test::scoped_file): Add
4352         user-declared move constructor and assignment operator, to make the
4353         type move-only.
4354
4355         * src/c++17/fs_dir.cc (_Dir::advance(bool, error_code&)): Handle
4356         d_type == DT_UNKNOWN immediately.
4357         (_Dir::should_recurse(bool, error_code&)): Remove file_type::unknown
4358         handling here.
4359         * testsuite/27_io/filesystem/iterators/caching.cc: New test.
4360
4361         * include/bits/fs_path.h (path::operator=(path&&)): Check for self
4362         assignment.
4363         * src/c++17/fs_path.cc (path::operator=(const path&)): Likewise.
4364         * testsuite/27_io/filesystem/path/assign/copy.cc: Test self
4365         assignment.
4366
4367         PR libstdc++/87431 (again)
4368         * include/bits/basic_string.h (__variant::_Never_valueless_alt):
4369         Define partial specialization for basic_string.
4370         * include/bits/shared_ptr.h (_Never_valueless_alt): Likewise for
4371         shared_ptr and weak_ptr.
4372         * include/bits/std_function.h (_Never_valueless_alt): Likewise for
4373         function.
4374         * include/bits/stl_vector.h (_Never_valueless_alt): Likewise for
4375         vector.
4376         * include/bits/unique_ptr.h (_Never_valueless_alt): Likewise for
4377         unique_ptr.
4378         * include/debug/vector (_Never_valueless_alt): Likewise for debug
4379         vector.
4380         * include/std/any (_Never_valueless_alt): Define explicit
4381         specialization for any.
4382         * include/std/variant (_Never_valueless_alt): Define primary template.
4383         (__never_valueless): Use _Never_valueless_alt instead of
4384         is_trivially_copyable.
4385         (variant::emplace<N>(Args&&...)): Add special case for non-throwing
4386         initializations to avoid try-catch overhead. Add special case for
4387         scalars produced by potentially-throwing conversions. Use
4388         _Never_valueless_alt instead of is_trivially_copyable for the
4389         remaining strong exception-safety cases.
4390         (variant::emplace<N>(initializer_list<U>, Args&&...)): Likewise.
4391         * testsuite/20_util/variant/87431.cc: Run both test functions.
4392         * testsuite/20_util/variant/exception_safety.cc: New test.
4393         * testsuite/20_util/variant/run.cc: Use pmr::string instead of string,
4394         so the variant becomes valueless.
4395
4396 2019-04-03  Jonathan Wakely  <jwakely@redhat.com>
4397
4398         PR libstdc++/85184
4399         * include/std/variant (_Copy_assign_base, _Move_assign_base, variant):
4400         Remove assertions.
4401         (variant::emplace<_Tp>): Return result of emplace<N> directly.
4402
4403         * include/std/string (__hash_string_base): New class template defining
4404         operator() for hashing strings.
4405         (hash<pmr::string>, hash<pmr::u8string>, hash<pmr::u16string>)
4406         (hash<pmr::u32string>, hash<pmr::wstring>): Define for C++17.
4407         * testsuite/21_strings/basic_string/hash/hash.cc: New test.
4408         * testsuite/21_strings/basic_string/hash/hash_char8_t.cc: New test.
4409
4410 2019-04-01  Ville Voutilainen  <ville.voutilainen@gmail.com>
4411
4412         Use single-visitation in variant assignment and swap and relops.
4413         Also use indices instead of types when checking whether
4414         variants hold the same thing.
4415         * include/std/variant (__do_visit): Add a template parameter
4416         for index visitation, invoke with indices if index visitation
4417         is used.
4418         (__variant_idx_cookie): New.
4419         (__visit_with_index): Likewise.
4420         (_Copy_assign_base::operator=): Do single-visitation with
4421         an index visitor.
4422         (_Move_assign_base::operator=): Likewise.
4423         (_Extra_visit_slot_needed): Adjust.
4424         (__visit_invoke): Call with indices if it's an index visitor.
4425         (relops): Do single-visitation with an index visitor.
4426         (swap): Likewise.
4427         (__visitor_result_type): New.
4428
4429 2019-03-30  Eric Botcazou  <ebotcazou@adacore.com>
4430
4431         * src/c++17/fs_ops.cc (fs::permissions): Use std::errc::not_supported.
4432
4433 2019-03-28  Ville Voutilainen  <ville.voutilainen@gmail.com>
4434
4435         Don't revisit a variant we are already visiting.
4436         * include/std/variant (__variant_construct_single): New.
4437         (__variant_construct): Use it.
4438         (_M_destructive_move): Likewise.
4439         (_M_destructive_copy): Likewise.
4440         (_Copy_assign_base::operator=): Adjust.
4441         (_Move_assign_base::operator=): Likewise.
4442         (swap): Likewise.
4443
4444 2019-03-26  Jonathan Wakely  <jwakely@redhat.com>
4445
4446         PR libstdc++/85965
4447         * include/bits/hashtable.h (_Hashtable): Move static assertions to
4448         destructor so they are not evaluated until the _Key type is complete.
4449         * include/bits/stl_tree.h (_Rb_tree): Likewise.
4450         * testsuite/23_containers/set/85965.cc: New test.
4451         * testsuite/23_containers/unordered_set/85965.cc: New test.
4452         * testsuite/23_containers/map/48101_neg.cc: Replace "here" errors
4453         with regexp matching the corresponding _Rb_tree specialization.
4454         * testsuite/23_containers/multimap/48101_neg.cc: Likewise.
4455         * testsuite/23_containers/multiset/48101_neg.cc: Remove "here" error.
4456         * testsuite/23_containers/set/48101_neg.cc: Likewise.
4457         * testsuite/23_containers/unordered_map/48101_neg.cc: Likewise.
4458         * testsuite/23_containers/unordered_multimap/48101_neg.cc: Likewise.
4459         * testsuite/23_containers/unordered_multiset/48101_neg.cc: Likewise.
4460         * testsuite/23_containers/unordered_set/48101_neg.cc: Likewise.
4461
4462 2019-03-26  Ville Voutilainen  <ville.voutilainen@gmail.com>
4463
4464         PR libstdc++/89825
4465         Fix based on a suggestion by Antony Polukhin.
4466         * include/std/variant (__never_valueless): New.
4467         (_M_valid): Use it.
4468         (_Extra_visit_slot_needed): New.
4469         (_Multi_array): Use it.
4470         (_S_apply_all_alts): Likewise.
4471
4472 2019-03-26  Ville Voutilainen  <ville.voutilainen@gmail.com>
4473
4474         PR libstdc++/89824
4475         Fix based on a suggestion by Antony Polukhin.
4476         * include/std/variant (__gen_vtable): Don't reserve an
4477         additional table slot, _Multi_array already does that.
4478
4479 2019-03-26  Ville Voutilainen  <ville.voutilainen@gmail.com>
4480
4481         PR libstdc++/89816
4482         Fix based on a suggestion by Antony Polukhin.
4483         * include/std/variant (__variant_construct): Capture a pointer
4484         to the storage and visit just one variant.
4485
4486 2019-03-22  Jonathan Wakely  <jwakely@redhat.com>
4487
4488         * doc/xml/manual/backwards_compatibility.xml: Remove link to
4489         Doxygen-generated pages with unstable URL.
4490         * doc/xml/manual/concurrency_extensions.xml: Likewise.
4491         * doc/xml/manual/extensions.xml: Likewise.
4492         * doc/xml/manual/parallel_mode.xml: Likewise.
4493         * doc/xml/manual/support.xml: Likewise.
4494
4495         * include/bits/stl_algobase.h (__lg): Do arithmetic on type int to
4496         avoid -Wconversion warnings.
4497
4498 2019-03-21  Thomas Rodgers  <trodgers@redhat.com>
4499
4500         * include/Makefile.am (std_header): Add ${std_srcdir}/execution.
4501         (pstl_srcdir, pstl_builddir, pstl_headers): New variables.
4502         (allstamped): Add stamp-pstl.
4503         (install-headers): Add ptsl_builddir.
4504         * include/Makefile.in: Regenerate.
4505         * include/bits/c++config: Add pstl configuration.
4506         * include/pstl/LICENSE.txt: New file.
4507         * include/pstl/algorithm_fwd.h: New file.
4508         * include/pstl/algorithm_impl.h: New file.
4509         * include/pstl/execution_defs.h: New file.
4510         * include/pstl/execution_impl.h: New file.
4511         * include/pstl/glue_algorithm_defs.h: New file.
4512         * include/pstl/glue_algorithm_impl.h: New file.
4513         * include/pstl/glue_execution_defs.h: New file.
4514         * include/pstl/glue_memory_defs.h: New file.
4515         * include/pstl/glue_memory_impl.h: New file.
4516         * include/pstl/glue_numeric_defs.h: New file.
4517         * include/pstl/glue_numeric_impl.h: New file.
4518         * include/pstl/memory_impl.h: New file.
4519         * include/pstl/numeric_fwd.h: New file.
4520         * include/pstl/numeric_impl.h: New file.
4521         * include/pstl/parallel_backend.h: New file.
4522         * include/pstl/parallel_backend_tbb.h: New file.
4523         * include/pstl/parallel_backend_utils.h: New file.
4524         * include/pstl/parallel_impl.h: New file.
4525         * include/pstl/pstl_config.h: New file.
4526         * include/pstl/unseq_backend_simd.h: New file.
4527         * include/pstl/utils.h: New file.
4528         * include/std/algorithm: Include parallel algorithm implementations.
4529         * include/std/execution: New file.
4530         * include/std/memory: Include parallel algorithm implementations.
4531         * include/std/numeric: Include parallel algorithm implementations.
4532         * include/std/version: Add parallel algorithms feature test macro.
4533         * testsuite/util/pstl/pstl_test_config.h: New file.
4534         * testsuite/util/pstl/test_utils.h: New file.
4535         * testsuite/20_util/specialized_algorithms/pstl/uninitialized_construct.cc: New file.
4536         * testsuite/20_util/specialized_algorithms/pstl/uninitialized_copy_move.cc: New file.
4537         * testsuite/20_util/specialized_algorithms/pstl/uninitialized_fill_destroy.cc: New file.
4538         * testsuite/25_algorithms/pstl/alg_merge/inplace_merge.cc: New file.
4539         * testsuite/25_algorithms/pstl/alg_merge/merge.cc: New file.
4540         * testsuite/25_algorithms/pstl/alg_modifying_operations/copy_if.cc: New file.
4541         * testsuite/25_algorithms/pstl/alg_modifying_operations/copy_move.cc: New file.
4542         * testsuite/25_algorithms/pstl/alg_modifying_operations/fill.cc: New file.
4543         * testsuite/25_algorithms/pstl/alg_modifying_operations/generate.cc: New file.
4544         * testsuite/25_algorithms/pstl/alg_modifying_operations/is_partitioned.cc: New file.
4545         * testsuite/25_algorithms/pstl/alg_modifying_operations/partition.cc: New file.
4546         * testsuite/25_algorithms/pstl/alg_modifying_operations/partition_copy.cc: New file.
4547         * testsuite/25_algorithms/pstl/alg_modifying_operations/remove.cc: New file.
4548         * testsuite/25_algorithms/pstl/alg_modifying_operations/remove_copy.cc: New file.
4549         * testsuite/25_algorithms/pstl/alg_modifying_operations/replace.cc: New file.
4550         * testsuite/25_algorithms/pstl/alg_modifying_operations/replace_copy.cc: New file.
4551         * testsuite/25_algorithms/pstl/alg_modifying_operations/rotate.cc: New file.
4552         * testsuite/25_algorithms/pstl/alg_modifying_operations/rotate_copy.cc: New file.
4553         * testsuite/25_algorithms/pstl/alg_modifying_operations/swap_ranges.cc: New file.
4554         * testsuite/25_algorithms/pstl/alg_modifying_operations/transform_binary.cc: New file.
4555         * testsuite/25_algorithms/pstl/alg_modifying_operations/transform_unary.cc: New file.
4556         * testsuite/25_algorithms/pstl/alg_modifying_operations/unique.cc: New file.
4557         * testsuite/25_algorithms/pstl/alg_modifying_operations/unique_copy_equal.cc: New file.
4558         * testsuite/25_algorithms/pstl/alg_nonmodifying/adjacent_find.cc: New file.
4559         * testsuite/25_algorithms/pstl/alg_nonmodifying/all_of.cc: New file.
4560         * testsuite/25_algorithms/pstl/alg_nonmodifying/any_of.cc: New file.
4561         * testsuite/25_algorithms/pstl/alg_nonmodifying/count.cc: New file.
4562         * testsuite/25_algorithms/pstl/alg_nonmodifying/equal.cc: New file.
4563         * testsuite/25_algorithms/pstl/alg_nonmodifying/find.cc: New file.
4564         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_end.cc: New file.
4565         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_first_of.cc: New file.
4566         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_if.cc: New file.
4567         * testsuite/25_algorithms/pstl/alg_nonmodifying/for_each.cc: New file.
4568         * testsuite/25_algorithms/pstl/alg_nonmodifying/mismatch.cc: New file.
4569         * testsuite/25_algorithms/pstl/alg_nonmodifying/none_of.cc: New file.
4570         * testsuite/25_algorithms/pstl/alg_nonmodifying/nth_element.cc: New file.
4571         * testsuite/25_algorithms/pstl/alg_nonmodifying/reverse.cc: New file.
4572         * testsuite/25_algorithms/pstl/alg_nonmodifying/reverse_copy.cc: New file.
4573         * testsuite/25_algorithms/pstl/alg_nonmodifying/search_n.cc: New file.
4574         * testsuite/25_algorithms/pstl/alg_sorting/includes.cc: New file.
4575         * testsuite/25_algorithms/pstl/alg_sorting/is_heap.cc: New file.
4576         * testsuite/25_algorithms/pstl/alg_sorting/is_sorted.cc: New file.
4577         * testsuite/25_algorithms/pstl/alg_sorting/lexicographical_compare.cc: New file.
4578         * testsuite/25_algorithms/pstl/alg_sorting/minmax_element.cc: New file.
4579         * testsuite/25_algorithms/pstl/alg_sorting/partial_sort.cc: New file.
4580         * testsuite/25_algorithms/pstl/alg_sorting/partial_sort_copy.cc: New file.
4581         * testsuite/25_algorithms/pstl/alg_sorting/set.cc: New file.
4582         * testsuite/25_algorithms/pstl/alg_sorting/sort.cc: New file.
4583         * testsuite/26_numerics/pstl/numeric_ops/adjacent_difference.cc: New file.
4584         * testsuite/26_numerics/pstl/numeric_ops/reduce.cc: New file.
4585         * testsuite/26_numerics/pstl/numeric_ops/scan.cc: New file.
4586         * testsuite/26_numerics/pstl/numeric_ops/transform_reduce.cc: New file.
4587         * testsuite/26_numerics/pstl/numeric_ops/transform_scan.cc: New file.
4588         * testsuite/testsuite/20_util/specialized_algorithms/pstl/uninitialized_construct.cc: New file.
4589         * testsuite/testsuite/20_util/specialized_algorithms/pstl/uninitialized_copy_move.cc: New file.
4590         * testsuite/testsuite/20_util/specialized_algorithms/pstl/uninitialized_fill_destroy.cc: New file.
4591         * testsuite/testsuite/25_algorithms/pstl/alg_merge/inplace_merge.cc: New file.
4592         * testsuite/testsuite/25_algorithms/pstl/alg_merge/merge.cc: New file.
4593         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/copy_if.cc: New file.
4594         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/copy_move.cc: New file.
4595         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/fill.cc: New file.
4596         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/generate.cc: New file.
4597         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/is_partitioned.cc: New file.
4598         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/partition.cc: New file.
4599         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/partition_copy.cc: New file.
4600         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/remove.cc: New file.
4601         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/remove_copy.cc: New file.
4602         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/replace.cc: New file.
4603         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/replace_copy.cc: New file.
4604         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/rotate.cc: New file.
4605         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/rotate_copy.cc: New file.
4606         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/swap_ranges.cc: New file.
4607         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/transform_binary.cc: New file.
4608         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/transform_unary.cc: New file.
4609         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/unique.cc: New file.
4610         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/unique_copy_equal.cc: New file.
4611         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/adjacent_find.cc: New file.
4612         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/all_of.cc: New file.
4613         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/any_of.cc: New file.
4614         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/count.cc: New file.
4615         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/equal.cc: New file.
4616         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/find.cc: New file.
4617         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/find_end.cc: New file.
4618         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/find_first_of.cc: New file.
4619         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/find_if.cc: New file.
4620         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/for_each.cc: New file.
4621         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/mismatch.cc: New file.
4622         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/none_of.cc: New file.
4623         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/nth_element.cc: New file.
4624         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/reverse.cc: New file.
4625         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/reverse_copy.cc: New file.
4626         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/search_n.cc: New file.
4627         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/includes.cc: New file.
4628         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/is_heap.cc: New file.
4629         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/is_sorted.cc: New file.
4630         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/lexicographical_compare.cc: New file.
4631         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/minmax_element.cc: New file.
4632         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/partial_sort.cc: New file.
4633         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/partial_sort_copy.cc: New file.
4634         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/set.cc: New file.
4635         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/sort.cc: New file.
4636         * testsuite/testsuite/26_numerics/pstl/numeric_ops/adjacent_difference.cc: New file.
4637         * testsuite/testsuite/26_numerics/pstl/numeric_ops/reduce.cc: New file.
4638         * testsuite/testsuite/26_numerics/pstl/numeric_ops/scan.cc: New file.
4639         * testsuite/testsuite/26_numerics/pstl/numeric_ops/transform_reduce.cc: New file.
4640         * testsuite/testsuite/26_numerics/pstl/numeric_ops/transform_scan.cc: New file.
4641
4642 2019-03-21  Jonathan Wakely  <jwakely@redhat.com>
4643
4644         * include/c_compatibility/math.h [!__STDCPP_WANT_MATH_SPEC_FUNCS__]
4645         (assoc_laguerre, assoc_laguerref, assoc_laguerrel, assoc_legendre)
4646         (assoc_legendref, assoc_legendrel, beta, betaf, betal, comp_ellint_1)
4647         (comp_ellint_1f, comp_ellint_1l, comp_ellint_2, comp_ellint_2f)
4648         (comp_ellint_2l, comp_ellint_3, comp_ellint_3f, comp_ellint_3l)
4649         (cyl_bessel_i, cyl_bessel_if, cyl_bessel_il, cyl_bessel_j)
4650         (cyl_bessel_jf, cyl_bessel_jl, cyl_bessel_k, cyl_bessel_kf)
4651         (cyl_bessel_kl, cyl_neumann, cyl_neumannf, cyl_neumannl, ellint_1)
4652         (ellint_1f, ellint_1l, ellint_2, ellint_2f, ellint_2l, ellint_3)
4653         (ellint_3f, ellint_3l, expint, expintf, expintl, hermite, hermitef)
4654         (hermitel, laguerre, laguerref, laguerrel, legendre, legendref)
4655         (legendrel, riemann_zeta, riemann_zetaf, riemann_zetal, sph_bessel)
4656         (sph_besself, sph_bessell, sph_legendre, sph_legendref, sph_legendrel)
4657         (sph_neumann, sph_neumannf, sph_neumannl): Only add using-declarations
4658         when the special functions IS is enabled, not for C++17.
4659         * testsuite/26_numerics/headers/cmath/functions_global_c++17.cc:
4660         Replace with ...
4661         * testsuite/26_numerics/headers/cmath/functions_global.cc: New test,
4662         without checks for special functions in C++17.
4663         * testsuite/26_numerics/headers/cmath/special_functions_global.cc:
4664         New test.
4665
4666         PR libstdc++/88066
4667         * include/backward/hash_map: Use <> for includes not "".
4668         * include/backward/hash_set: Likewise.
4669         * include/backward/strstream: Likewise.
4670         * include/tr1/bessel_function.tcc: Likewise.
4671         * include/tr1/exp_integral.tcc: Likewise.
4672         * include/tr1/legendre_function.tcc: Likewise.
4673         * include/tr1/modified_bessel_func.tcc: Likewise.
4674         * include/tr1/riemann_zeta.tcc: Likewise.
4675
4676 2019-03-19  Jonathan Wakely  <jwakely@redhat.com>
4677
4678         * doc/xml/manual/allocator.xml: Link to table documenting evolution
4679         of extension allocators.
4680         * doc/xml/manual/evolution.xml: Use angle brackets for header names.
4681         Document new headers in 7.2, 8.1 and 9.1 releases.
4682         * doc/xml/manual/using.xml: Adjust link target for new_allocator.
4683         * doc/html/*: Regenerate.
4684
4685 2019-03-12  John David Anglin  <dave.anglin@bell.net>
4686
4687         PR libstdc++/89461
4688         * testsuite/lib/libstdc++.exp: Locate libatomic.
4689         * testsuite/lib/dg-options.exp (add_options_for_libatomic): New.
4690         * testsuite/20_util/shared_ptr/thread/default_weaktoshared.cc: Add
4691         libatomic options.
4692         * testsuite/20_util/shared_ptr/thread/mutex_weaktoshared.cc: Likewise.
4693         * testsuite/experimental/net/timer/waitable/cons.cc: Likewise.
4694         * testsuite/experimental/net/timer/waitable/dest.cc: Likewise.
4695         * testsuite/experimental/net/timer/waitable/ops.cc: Likewise.
4696
4697 2019-03-11  Jonathan Wakely  <jwakely@redhat.com>
4698
4699         PR libstdc++/89460
4700         * configure.ac: Check for sockatmark.
4701         * crossconfig.m4: Check for sockatmark.
4702         * config.h.in: Regenerate.
4703         * configure: Regenerate.
4704         * include/experimental/internet (address_v4::_S_hton): Rename
4705         overloaded functions to _S_hton_16 and _S_ntoh_16.
4706         (address_v4::_S_ntoh): Rename to _S_ntoh_16 and _S_ntoh_32.
4707         (basic_endpoint): Adjust calls to _S_hton and _S_ntoh.
4708         * include/experimental/socket (basic_socket::at_mark): Check
4709         _GLIBCXX_HAVE_SOCKATMARK.
4710
4711         * testsuite/29_atomics/atomic_flag/test_and_set/explicit-hle.cc: Use
4712         const variables instead of macros.
4713
4714         PR libstdc++/89629
4715         * libsupc++/hash_bytes.cc [__SIZEOF_SIZE_T__ == 8] (_Hash_bytes):
4716         Use correct type for len_aligned.
4717         * testsuite/20_util/hash/89629.cc: New test.
4718
4719 2019-03-11  Jakub Jelinek  <jakub@redhat.com>
4720
4721         PR libstdc++/89641
4722         * include/std/atomic (atomic<T>::store, atomic<T>::load,
4723         atomic<T>::exchange, atomic<T>::compare_exchange_weak,
4724         atomic<T>::compare_exchange_strong): Cast __m or __s and __f to int.
4725         * include/bits/atomic_base.h (__atomic_base<T>::operator++,
4726         __atomic_base<T>::operator--, __atomic_base<T>::operator+=,
4727         __atomic_base<T>::operator-=, __atomic_base<T>::operator&=,
4728         __atomic_base<T>::operator|=, __atomic_base<T>::operator^=,
4729         __atomic_base<T*>::operator++, __atomic_base<T*>::operator--,
4730         __atomic_base<T*>::operator+=, __atomic_base<T*>::operator-=): Cast
4731         memory_order_seq_cst to int.
4732
4733 2019-03-08  Jonathan Wakely  <jwakely@redhat.com>
4734
4735         * doc/xml/manual/using.xml: Use link element instead of xref.
4736         * doc/html/*: Regenerate.
4737
4738         * include/bits/fs_path.h (path::format): Add fixed underlying type.
4739
4740 2019-03-08  François Dumont  <fdumont@gcc.gnu.org>
4741
4742         PR libstdc++/89477
4743         * include/debug/map.h (map): Use _RequireNotAllocator to constrain
4744         parameters in deduction guides.
4745         * include/debug/multimap.h (multimap): Likewise.
4746         * include/debug/set.h (multimap): Likewise.
4747         * include/debug/multiset.h (multimap): Likewise.
4748         * include/debug/unordered_map (unordered_map): Likewise.
4749         (unordered_multimap): Likewise.
4750         * include/debug/unordered_set (unordered_set): Likewise.
4751         (unordered_multiset): Likewise.
4752
4753         PR libstdc++/89608
4754         * include/debug/unordered_map (unordered_map<>::_M_check_rehashed):
4755         Invalidate all iterators in case of rehash.
4756         (unordered_multimap<>::_M_check_rehashed): Likewise.
4757         * include/debug/unordered_set
4758         (unordered_set<>::_M_check_rehashed): Likewise.
4759         (unordered_multiset<>::_M_check_rehashed): Likewise.
4760         * testsuite/23_containers/unordered_set/debug/89608_neg.cc: New.
4761
4762 2019-03-07  Andreas Schwab  <schwab@suse.de>
4763
4764         * config/abi/post/riscv64-linux-gnu: New directory.
4765         * config/abi/post/riscv64-linux-gnu/baseline_symbols.txt: New file.
4766
4767 2019-03-07  Jonathan Wakely  <jwakely@redhat.com>
4768
4769         * testsuite/20_util/function_objects/bind_front/1.cc: Change from
4770         compile test to run. Fix typo.
4771
4772         * doc/xml/manual/status_cxx2020.xml: Update C++20 status.
4773         * doc/html/*: Regenerate.
4774
4775         P0356R5 Simplified partial function application
4776         * include/std/functional [C++20] (_Bind_front, _Bind_front_t): Define
4777         helpers for bind_front.
4778         (bind_front, __cpp_lib_bind_front): Define.
4779         * testsuite/20_util/function_objects/bind_front/1.cc: New test.
4780
4781 2019-03-06  Jonathan Wakely  <jwakely@redhat.com>
4782
4783         * include/std/type_traits (__cpp_lib_bounded_array_traits): Define.
4784         * include/std/version (__cpp_lib_bounded_array_traits): Likewise.
4785         * testsuite/20_util/is_bounded_array/value.cc: Check for macro.
4786         * testsuite/20_util/is_unbounded_array/value.cc: Likewise.
4787
4788 2019-03-06  Edward Smith-Rowland  <3dw4rd@verizon.net>
4789
4790         PR libstdc++/86655 - std::assoc_legendre should not constrain
4791         the value of m (or x).
4792         * include/tr1/legendre_function.tcc (__assoc_legendre_p,
4793         __sph_legendre): If degree > order Don't throw, return 0.
4794         (__legendre_p, __assoc_legendre_p): Don't constrain x either.
4795         * testsuite/special_functions/02_assoc_legendre/pr86655.cc: New test.
4796         * testsuite/special_functions/20_sph_legendre/pr86655.cc: New test.
4797         * testsuite/tr1/5_numerical_facilities/special_functions/
4798         02_assoc_legendre/pr86655.cc: New test.
4799         * testsuite/tr1/5_numerical_facilities/special_functions/
4800         22_sph_legendre/pr86655.cc: New test.
4801
4802 2019-03-06  Ville Voutilainen  <ville.voutilainen@gmail.com>
4803
4804         Rewrite variant.
4805         Also PR libstdc++/85517
4806         * include/std/variant (__do_visit): New.
4807         (__variant_cast): Likewise.
4808         (__variant_cookie): Likewise.
4809         (__erased_*): Remove.
4810         (_Variant_storage::_S_vtable): Likewise.
4811         (_Variant_storage::__M_reset_impl): Adjust to use __do_visit.
4812         (_Variant_storage::__M_reset): Adjust.
4813         (__variant_construct): New.
4814         (_Copy_ctor_base(const _Copy_ctor_base&)): Adjust to use
4815         __variant_construct.
4816         (_Move_ctor_base(_Move_ctor_base&&)): Likewise.
4817         (_Move_ctor_base::__M_destructive_copy): New.
4818         (_Move_ctor_base::__M_destructive_move): Adjust to use
4819         __variant_construct.
4820         (_Copy_assign_base::operator=): Adjust to use __do_visit.
4821         (_Copy_assign_alias): Adjust to check both copy assignment
4822         and copy construction for triviality.
4823         (_Move_assign_base::operator=): Adjust to use __do_visit.
4824         (_Multi_array): Add support for visitors that accept and return
4825         a __variant_cookie.
4826         (__gen_vtable_impl::_S_apply_all_alts): Likewise.
4827         (__gen_vtable_impl::_S_apply_single_alt): Likewise.
4828         (__gen_vtable_impl::__element_by_index_or_cookie): New. Generate
4829         a __variant_cookie temporary for a variant that is valueless and..
4830         (__gen_vtable_impl::__visit_invoke): ..adjust here.
4831         (__gen_vtable::_Array_type): Conditionally make space for
4832         the __variant_cookie visitor case.
4833         (__variant_construct_by_index): New.
4834         (get_if): Adjust to use std::addressof.
4835         (relops): Adjust to use __do_visit.
4836         (variant): Add __variant_cast and __variant_construct_by_index
4837         as friends.
4838         (variant::emplace): Use _M_reset() and __variant_construct_by_index
4839         instead of self-destruction.
4840         (variant::swap): Adjust to use __do_visit.
4841         (visit): Reimplement in terms of __do_visit.
4842         (__variant_hash_call_base_impl::operator()): Adjust to use __do_visit.
4843         * testsuite/20_util/variant/compile.cc: Adjust.
4844         * testsuite/20_util/variant/run.cc: Likewise.
4845
4846 2019-03-06  Jonathan Wakely  <jwakely@redhat.com>
4847
4848         * include/bits/c++config.h (_cpp_lib_char8_t): Add L suffix to
4849         constant.
4850         * testsuite/experimental/feat-char8_t.cc: Likewise.
4851
4852          * include/std/type_traits [C++20] (is_bounded_array)
4853          (is_unbounded_array, is_bounded_array_v, is_unbounded_array_v):
4854          Define.
4855          * testsuite/20_util/is_bounded_array/requirements/
4856          explicit_instantiation.cc: New test.
4857          * testsuite/20_util/is_bounded_array/requirements/typedefs.cc: New
4858          test.
4859          * testsuite/20_util/is_bounded_array/value.cc: New test.
4860          * testsuite/20_util/is_unbounded_array/requirements/
4861          explicit_instantiation.cc: New test.
4862          * testsuite/20_util/is_unbounded_array/requirements/typedefs.cc: New
4863          * test.
4864          * testsuite/20_util/is_unbounded_array/value.cc: New test.
4865
4866         * include/bits/ptr_traits.h [C++20] (pointer_traits<T*>::pointer_to):
4867         Add constexpr.
4868         * testsuite/20_util/pointer_traits/pointer_to_constexpr.cc: New test.
4869
4870 2019-03-05  Jonathan Wakely  <jwakely@redhat.com>
4871
4872         * include/c_compatibility/math.h [C++20] (lerp): Add using
4873         declaration.
4874         * include/c_global/cmath [C++20] (__cpp_lib_interpolate): Define.
4875         (__lerp): Define function template to implement lerp.
4876         (lerp(float, float, float), lerp(double, double, double))
4877         (lerp(long double, long double, long double)): Define for C++20.
4878         * include/std/numeric [C++20] (__cpp_lib_interpolate): Define.
4879         (midpoint(T, T), midpoint(T*, T*)): Define.
4880         * include/std::version [C++20] (__cpp_lib_interpolate): Define.
4881         * testsuite/26_numerics/lerp.cc: New test.
4882         * testsuite/26_numerics/midpoint/floating.cc: New test.
4883         * testsuite/26_numerics/midpoint/integral.cc: New test.
4884         * testsuite/26_numerics/midpoint/pointer.cc: New test.
4885
4886 2019-03-04  Edward Smith-Rowland  <3dw4rd@verizon.net>
4887
4888         PR libstdc++/88996 Implement P0439R0
4889         Make std::memory_order a scoped enumeration.
4890         * include/bits/atomic_base.h: For C++20 make memory_order a scoped enum,
4891         add variables for the old enumerators.  Adjust calls.
4892         * testsuite/29_atomics/headers/atomic/types_std_c++2a.cc: New test.
4893         * testsuite/29_atomics/headers/atomic/types_std_c++2a_neg.cc: New test.
4894
4895 2019-03-04  Jonathan Wakely  <jwakely@redhat.com>
4896
4897         * testsuite/26_numerics/bit/bitops.rot/rotl.cc: Remove bogus dg-do
4898         directive.
4899
4900         * include/std/memory_resource (polymorphic_allocator): Add default
4901         template argument for C++20.
4902         (polymorphic_allocator::allocate_bytes)
4903         (polymorphic_allocator::deallocate_bytes)
4904         (polymorphic_allocator::allocate_object)
4905         (polymorphic_allocator::deallocate_object)
4906         (polymorphic_allocator::new_object)
4907         (polymorphic_allocator::delete_object): New member functions for
4908         C++20.
4909         * testsuite/20_util/polymorphic_allocator/allocate_object.cc: New
4910         test.
4911
4912 2019-03-03  Jonathan Wakely  <jwakely@redhat.com>
4913
4914         PR libstdc++/89562
4915         * src/filesystem/ops-common.h (do_copy_file): Open files in binary
4916         mode for mingw.
4917
4918 2019-03-01  Jonathan Wakely  <jwakely@redhat.com>
4919
4920         * testsuite/util/testsuite_allocator.h (__gnu_test::memory_resource)
4921         [!__cpp_sized_deallocation]: Do not pass size to operator delete.
4922
4923         * include/std/memory (uses_allocator_construction_args): New set of
4924         overloaded functions.
4925         (make_obj_using_allocator, uninitialized_construct_using_allocator):
4926         New functions.
4927         * include/std/memory_resource (polymorphic_allocator::construct)
4928         [__cplusplus > 201703l]: Replace all overloads with a single function
4929         using uses_allocator_construction_args.
4930         * testsuite/20_util/polymorphic_allocator/construct_c++2a.cc: New
4931         test.
4932         * testsuite/20_util/uses_allocator/make_obj.cc: New test.
4933
4934 2019-02-27  Jonathan Wakely  <jwakely@redhat.com>
4935
4936         PR libstdc++/89466
4937         * acinclude.m4 (GLIBCXX_CONFIGURE_DOCBOOK): Reorder check for local
4938         stylesheet directories before check for xsltproc. Try to use
4939         xmlcatalog to find local stylesheet directory before trying hardcoded
4940         paths. Add path used by suse to hardcoded paths. Adjust xsltproc
4941         check to look for the same stylesheet as doc/Makefile.am uses. Don't
4942         use xsltproc if xmlcatalog fails to find a local stylesheet.
4943         * configure.ac: Check for xmlcatalog.
4944         * Makefile.in: Regenerate.
4945         * configure: Likewise.
4946         * doc/Makefile.in: Likewise.
4947         * include/Makefile.in: Likewise.
4948         * libsupc++/Makefile.in: Likewise.
4949         * po/Makefile.in: Likewise.
4950         * python/Makefile.in: Likewise.
4951         * src/Makefile.in: Likewise.
4952         * src/c++11/Makefile.in: Likewise.
4953         * src/c++17/Makefile.in: Likewise.
4954         * src/c++98/Makefile.in: Likewise.
4955         * src/filesystem/Makefile.in: Likewise.
4956         * testsuite/Makefile.in: Likewise.
4957
4958 2019-02-26  Jonathan Wakely  <jwakely@redhat.com>
4959
4960         PR libstdc++/89477
4961         * include/bits/alloc_traits.h (_RequireNotAllocator): New helper for
4962         container deduction guides.
4963         * include/bits/hashtable.h (_RequireNotAllocatorOrIntegral): Likewise.
4964         * include/bits/stl_map.h (map): Use _RequireNotAllocator to constrain
4965         parameters in deduction guides.
4966         * include/bits/stl_multimap.h (multimap): Likewise.
4967         * include/bits/stl_multiset.h (multiset): Likewise.
4968         * include/bits/stl_queue.h (queue, priority_queue): Likewise.
4969         * include/bits/stl_set.h (set): Likewise.
4970         * include/bits/stl_stack.h (stack): Likewise.
4971         * include/bits/unordered_map.h (unordered_map, unordered_multimap):
4972         use _RequireNotAllocator and _RequireNotAllocatorOrIntegral to
4973         constrain parameters in deduction guides.
4974         * include/bits/unordered_set.h (unordered_set, unordered_multiset):
4975         Likewise.
4976         * testsuite/23_containers/map/cons/deduction.cc: Test additional
4977         deduction cases.
4978         * testsuite/23_containers/multiset/cons/deduction.cc: Likewise.
4979         * testsuite/23_containers/set/cons/deduction.cc: Likewise.
4980         * testsuite/23_containers/unordered_map/cons/deduction.cc: Likewise.
4981         * testsuite/23_containers/unordered_multimap/cons/deduction.cc:
4982         Likewise.
4983         * testsuite/23_containers/unordered_multiset/cons/deduction.cc:
4984         Likewise.
4985         * testsuite/23_containers/unordered_set/cons/deduction.cc: Likewise.
4986
4987         PR libstdc++/89416
4988         * include/bits/alloc_traits.h (__is_alloc_insertable_impl): Change
4989         to class template and partial specialization using void_t.
4990         (__is_copy_insertable, __is_move_insertable): Adjust base class.
4991
4992 2019-02-24  Jonathan Wakely  <jwakely@redhat.com>
4993
4994         PR libstdc++/89416
4995         * include/bits/alloc_traits.h (__is_alloc_insertable_impl): Make
4996         copy and move members public.
4997
4998 2019-02-23  Jonathan Wakely  <jwakely@redhat.com>
4999
5000         * include/std/type_traits (__underlying_type_impl): New helper to
5001         make underlying_type SFINAE-friendly.
5002         (underlying_type): Derive from __underlying_type_impl.
5003         * testsuite/20_util/underlying_type/requirements/typedefs-3.cc: New
5004         test.
5005
5006         PR libstdc++/89446
5007         * include/bits/char_traits.h (__constant_char_array): Check index is
5008         in range before dereferencing.
5009         (char_traits<char>::compare, char_traits<char>::find)
5010         (char_traits<char8_t>::compare, char_traits<char8_t>::find): Return
5011         immediately if n is zero.
5012         (char_traits<wchar_t>::compare, char_traits<wchar_t>::find): Likewise.
5013         Remove workarounds for PR 67026.
5014         * testsuite/21_strings/basic_string_view/operators/char/89446.cc:
5015         New test.
5016         * testsuite/21_strings/basic_string_view/operators/wchar_t/89446.cc:
5017         New test.
5018
5019 2019-02-22  Eric Botcazou  <ebotcazou@adacore.com>
5020
5021         * config/abi/post/sparc64-linux-gnu/baseline_symbols.txt: Adjust.
5022         * config/abi/post/sparc64-linux-gnu/32/baseline_symbols.txt: Likewise.
5023
5024 2019-02-22  Jakub Jelinek  <jakub@redhat.com>
5025
5026         PR libstdc++/89402
5027         * src/c++98/compatibility-ldbl.cc (_ZNKSt4hashIeEclEe): Change return
5028         type to std::size_t and argument to type to long double.
5029
5030 2019-02-22  Eric Botcazou  <ebotcazou@adacore.com>
5031
5032         * configure.host (abi_baseline_pair): Adjust for SPARC64/Linux.
5033         * config/abi/post/sparc64-linux-gnu: New directory.
5034         * config/abi/post/sparc64-linux-gnu/baseline_symbols.txt: New file.
5035         * config/abi/post/sparc64-linux-gnu/32: New directory.
5036         * config/abi/post/sparc64-linux-gnu/32/baseline_symbols.txt: New file.
5037
5038 2019-02-21  Jonathan Wakely  <jwakely@redhat.com>
5039
5040         * testsuite/29_atomics/headers/atomic/types_std_c++20.cc: New test.
5041         * testsuite/29_atomics/headers/atomic/types_std_c++20_neg.cc: New
5042         test.
5043
5044 2019-02-22  Tom Honermann  <tom@honermann.net>
5045
5046         * python/libstdcxx/v6/printers.py (register_type_printers): Add type
5047         printers for u8string and u8string_view.
5048
5049 2019-02-22  Tom Honermann  <tom@honermann.net>
5050
5051         * testsuite/18_support/byte/ops.cc: Validate
5052         std::to_integer<char8_t>, std::to_integer<char16_t>, and
5053         std::to_integer<char32_t>.
5054         * testsuite/18_support/numeric_limits/dr559.cc: Validate
5055         std::numeric_limits<char8_t>.
5056         * testsuite/18_support/numeric_limits/lowest.cc: Validate
5057         std::numeric_limits<char8_t>::lowest().
5058         * testsuite/18_support/numeric_limits/max_digits10.cc: Validate
5059         std::numeric_limits<char8_t>::max_digits10.
5060         * testsuite/18_support/type_info/fundamental.cc: Validate
5061         typeinfo for char8_t.
5062         * testsuite/20_util/from_chars/1_c++20_neg.cc: New test, validating
5063         std::from_chars with char8_t.
5064         * testsuite/20_util/hash/requirements/explicit_instantiation.cc:
5065         Validate explicit instantiation of std::hash<char8_t>.
5066         * testsuite/20_util/is_integral/value.cc: Validate
5067         std::is_integral<char8_t>.
5068         * testsuite/20_util/make_signed/requirements/typedefs-4.cc:
5069         Validate std::make_signed<char8_t>.
5070         * testsuite/21_strings/basic_string/cons/char/deduction.cc:
5071         Validate u8string construction from char8_t sources.
5072         * testsuite/21_strings/basic_string/types/pmr_typedefs.cc: Validate
5073         std::pmr::u8string.
5074         * testsuite/21_strings/basic_string_view/operations/compare/
5075         char/70483.cc: Validate substr operations on u8string_view.
5076         * testsuite/21_strings/basic_string_view/typedefs.cc: Validate that
5077         the u8string_view typedef is defined.
5078         * testsuite/21_strings/char_traits/requirements/
5079         constexpr_functions.cc: Validate char_traits<char8_t> constexpr
5080         member functions.
5081         * testsuite/21_strings/char_traits/requirements/
5082         constexpr_functions_c++17.cc: Validate char_traits<char8_t> C++17
5083         constexpr member functions.
5084         * testsuite/21_strings/headers/string/types_std_c++0x.cc: Validate
5085         that the u8string typedef is defined.
5086         * testsuite/22_locale/locale/cons/unicode.cc: Validate the presence
5087         of the std::codecvt<char16_t, char8_t, std::mbstate_t> and
5088         std::codecvt<char32_t, char8_t, std::mbstate_t> facets.
5089         * testsuite/29_atomics/atomic/cons/assign_neg.cc: Update line
5090         numbers.
5091         * testsuite/29_atomics/atomic/cons/copy_neg.cc: Likewise.
5092         * testsuite/29_atomics/atomic_integral/cons/assign_neg.cc:
5093         Likewise.
5094         * testsuite/29_atomics/atomic_integral/cons/copy_neg.cc: Likewise.
5095         * testsuite/29_atomics/atomic_integral/is_always_lock_free.cc:
5096         Validate std::atomic<char8_t>::is_always_lock_free
5097         * testsuite/29_atomics/atomic_integral/operators/bitwise_neg.cc:
5098         Update line numbers.
5099         * testsuite/29_atomics/atomic_integral/operators/decrement_neg.cc:
5100         Likewise.
5101         * testsuite/29_atomics/atomic_integral/operators/increment_neg.cc:
5102         Likewise.
5103         * testsuite/experimental/polymorphic_allocator/pmr_typedefs_string.cc:
5104         Validate std::experimental::pmr::u8string.
5105         * testsuite/experimental/string_view/typedefs.cc: Validate that the
5106         u8string_view typedef is defined.
5107         * testsuite/util/testsuite_common_types.h: Add char8_t, char16_t and
5108         char32_t to the typelists.
5109
5110 2019-02-22  Tom Honermann  <tom@honermann.net>
5111
5112         * include/ext/typelist.h: Constrain a partial specialization of
5113         typelist::detail::append_ to only match chain<T1,T2>.
5114
5115 2019-02-21  Jonathan Wakely  <jwakely@redhat.com>
5116
5117         PR libstdc++/89416
5118         * include/bits/alloc_traits.h (__is_alloc_insertable_impl): Replace
5119         class template with class. Replace move and copy member types with
5120         member alias templates, so they are only instantiated when needed.
5121         (__is_copy_insertable, __is_move_insertable): Adjust base class.
5122         * testsuite/23_containers/vector/modifiers/push_back/89130.cc: Enable
5123         test for C++11/14/17 as well.
5124         * testsuite/23_containers/vector/modifiers/push_back/89416.cc: New
5125         test.
5126
5127 2019-02-20  Jakub Jelinek  <jakub@redhat.com>
5128
5129         PR libstdc++/89402
5130         * src/c++98/compatibility-ldbl.cc (_ZNKSt4hashIeEclEe): Add
5131         _GLIBCXX_PURE to the alias declaration.
5132
5133 2019-02-19  Jonathan Wakely  <jwakely@redhat.com>
5134
5135         * testsuite/21_strings/basic_string/literals/types.cc
5136         [_GLIBCXX_USE_CHAR8_T]: Adjust expected string type for u8 literal.
5137         * testsuite/21_strings/basic_string/literals/values.cc
5138         [_GLIBCXX_USE_CHAR8_T]: Likewise.
5139         * testsuite/22_locale/codecvt/char16_t.cc: Adjust for u8 literals
5140         potentially having different type.
5141         * testsuite/22_locale/codecvt/char32_t.cc: Likewise.
5142         * testsuite/22_locale/codecvt/codecvt_utf8/79980.cc: Cast u8 literal
5143         to char.
5144         * testsuite/22_locale/codecvt/codecvt_utf8/wchar_t/1.cc: Likewise.
5145         * testsuite/22_locale/codecvt/utf8.cc: Likewise.
5146         * testsuite/22_locale/conversions/string/2.cc: Remove u8 prefix from
5147         string literals only using basic character set.
5148         * testsuite/22_locale/conversions/string/3.cc: Likewise. Cast other
5149         u8 literals to char.
5150         * testsuite/29_atomics/headers/atomic/macros.cc [_GLIBCXX_USE_CHAR8_T]:
5151         Test ATOMIC_CHAR8_T_LOCK_FREE.
5152         Add missing #error to ATOMIC_CHAR16_T_LOCK_FREE test.
5153         * testsuite/29_atomics/headers/atomic/types_std_c++0x.cc
5154         [_GLIBCXX_USE_CHAR8_T]: Check for std::atomic_char8_t.
5155         * testsuite/experimental/string_view/literals/types.cc
5156         [_GLIBCXX_USE_CHAR8_T]: Adjust expected string_view type for u8
5157         literal.
5158         * testsuite/experimental/string_view/literals/values.cc
5159         [_GLIBCXX_USE_CHAR8_T]: Likewise.
5160
5161 2019-02-19  Tom Honermann  <tom@honermann.net>
5162
5163         * testsuite/18_support/numeric_limits/char8_t.cc: New test cloned
5164         from char16_32_t.cc; validates numeric_limits<char8_t>.
5165         * testsuite/21_strings/basic_string/literals/types-char8_t.cc: New
5166         test cloned from types.cc; validates operator""s for char8_t
5167         returns u8string.
5168         * testsuite/21_strings/basic_string/literals/values-char8_t.cc: New
5169         test cloned from values.cc; validates construction and comparison
5170         of u8string values.
5171         * testsuite/21_strings/basic_string/requirements/
5172         /explicit_instantiation/char8_t/1.cc: New test cloned from
5173         char16_t/1.cc; validates explicit instantiation of
5174         basic_string<char8_t>.
5175         * testsuite/21_strings/basic_string_view/literals/types-char8_t.cc:
5176         New test cloned from types.cc; validates operator""sv for char8_t
5177         returns u8string_view.
5178         * testsuite/21_strings/basic_string_view/literals/
5179         values-char8_t.cc: New test cloned from values.cc; validates
5180         construction and comparison of u8string_view values.
5181         * testsuite/21_strings/basic_string_view/requirements/
5182         explicit_instantiation/char8_t/1.cc: New test cloned from
5183         char16_t/1.cc; validates explicit instantiation of
5184         basic_string_view<char8_t>.
5185         * testsuite/21_strings/char_traits/requirements/char8_t/65049.cc:
5186         New test cloned from char16_t/65049.cc; validates that
5187         char_traits<char8_t> is not vulnerable to the concerns in PR65049.
5188         * testsuite/21_strings/char_traits/requirements/char8_t/
5189         typedefs.cc: New test cloned from char16_t/typedefs.cc; validates
5190         that char_traits<char8_t> member typedefs are present and correct.
5191         * testsuite/21_strings/char_traits/requirements/
5192         explicit_instantiation/char8_t/1.cc: New test cloned from
5193         char16_t/1.cc; validates explicit instantiation of
5194         char_traits<char8_t>.
5195         * testsuite/22_locale/codecvt/char16_t-char8_t.cc: New test cloned
5196         from char16_t.cc: validates
5197         codecvt<char16_t, char8_t, mbstate_t>.
5198         * testsuite/22_locale/codecvt/char32_t-char8_t.cc: New test cloned
5199         from char32_t.cc: validates
5200         codecvt<char32_t, char8_t, mbstate_t>.
5201         * testsuite/22_locale/codecvt/utf8-char8_t.cc: New test cloned from
5202         utf8.cc; validates codecvt<char16_t, char8_t, std::mbstate_t> and
5203         codecvt<char32_t, char8_t, std::mbstate_t>.
5204         * testsuite/27_io/filesystem/path/native/string-char8_t.cc: New
5205         test cloned from string.cc; validates filesystem::path construction
5206         from char8_t input.
5207         * testsuite/experimental/feat-char8_t.cc: New test; validates that
5208         the __cpp_lib_char8_t feature test macro is defined with the
5209         correct value.
5210         * testsuite/experimental/filesystem/path/native/string-char8_t.cc:
5211         New test cloned from string.cc; validates filesystem::path
5212         construction from char8_t input.
5213         * testsuite/experimental/string_view/literals/types-char8_t.cc: New
5214         test cloned from types.cc; validates operator""sv for char8_t
5215         returns u8string_view.
5216         * testsuite/experimental/string_view/literals/values-char8_t.cc:
5217         New test cloned from values.cc; validates construction and
5218         comparison of u8string_view values.
5219         * testsuite/experimental/string_view/requirements/
5220         explicit_instantiation/char8_t/1.cc: New test cloned from
5221         char16_t/1.cc; validates explicit instantiation of
5222         basic_string_view<char8_t>.
5223         * testsuite/ext/char8_t/atomic-1.cc: New test; validates that
5224         ATOMIC_CHAR8_T_LOCK_FREE is not defined if char8_t support is not
5225         enabled.
5226
5227 2019-02-19  Tom Honermann  <tom@honermann.net>
5228
5229         P0482R5 char8_t: Standard library support
5230         * config/abi/pre/gnu-versioned-namespace.ver (CXXABI_2.0): Add
5231         typeinfo symbols for char8_t.
5232         * config/abi/pre/gnu.ver: Add CXXABI_1.3.12.
5233         (GLIBCXX_3.4.26): Add symbols for specializations of
5234         numeric_limits and codecvt that involve char8_t.
5235         (CXXABI_1.3.12): Add typeinfo symbols for char8_t.
5236         * include/bits/atomic_base.h: Add atomic_char8_t.
5237         * include/bits/basic_string.h: Add std::hash<u8string> and
5238         operator""s(const char8_t*, size_t).
5239         * include/bits/c++config: Define _GLIBCXX_USE_CHAR8_T and
5240         __cpp_lib_char8_t.
5241         * include/bits/char_traits.h: Add char_traits<char8_t>.
5242         * include/bits/codecvt.h: Add
5243         codecvt<char16_t, char8_t, mbstate_t>,
5244         codecvt<char32_t, char8_t, mbstate_t>,
5245         codecvt_byname<char16_t, char8_t, mbstate_t>, and
5246         codecvt_byname<char32_t, char8_t, mbstate_t>.
5247         * include/bits/cpp_type_traits.h: Add __is_integer<char8_t> to
5248         recognize char8_t as an integral type.
5249         * include/bits/fs_path.h: (path::__is_encoded_char): Recognize
5250         char8_t.
5251         (path::u8string): Return std::u8string when char8_t support is
5252         enabled.
5253         (path::generic_u8string): Likewise.
5254         (path::_S_convert): Handle conversion from char8_t input.
5255         (path::_S_str_convert): Likewise.
5256         * include/bits/functional_hash.h: Add hash<char8_t>.
5257         * include/bits/locale_conv.h (__str_codecvt_out): Add overloads for
5258         char8_t.
5259         * include/bits/locale_facets.h (_GLIBCXX_NUM_UNICODE_FACETS): Bump
5260         for new char8_t specializations.
5261         * include/bits/localefwd.h: Add missing declarations of
5262         codecvt<char16_t, char, mbstate_t> and
5263         codecvt<char32_t, char, mbstate_t>.  Add char8_t declarations
5264         codecvt<char16_t, char8_t, mbstate_t> and
5265         codecvt<char32_t, char8_t, mbstate_t>.
5266         * include/bits/postypes.h: Add u8streampos
5267         * include/bits/stringfwd.h: Add declarations of
5268         char_traits<char8_t> and u8string.
5269         * include/c_global/cstddef: Add __byte_operand<char8_t>.
5270         * include/experimental/bits/fs_path.h (path::__is_encoded_char):
5271         Recognize char8_t.
5272         (path::u8string): Return std::u8string when char8_t support is
5273         enabled.
5274         (path::generic_u8string): Likewise.
5275         (path::_S_convert): Handle conversion from char8_t input.
5276         (path::_S_str_convert): Likewise.
5277         * include/experimental/string: Add u8string.
5278         * include/experimental/string_view: Add u8string_view,
5279         hash<experimental::u8string_view>, and
5280         operator""sv(const char8_t*, size_t).
5281         * include/std/atomic: Add atomic<char8_t> and atomic_char8_t.
5282         * include/std/charconv (__is_int_to_chars_type): Recognize char8_t
5283         as a character type.
5284         * include/std/limits: Add numeric_limits<char8_t>.
5285         * include/std/string_view: Add u8string_view,
5286         hash<experimental::u8string_view>, and
5287         operator""sv(const char8_t*, size_t).
5288         * include/std/type_traits: Add __is_integral_helper<char8_t>,
5289         __make_unsigned<char8_t>, and __make_signed<char8_t>.
5290         * libsupc++/atomic_lockfree_defines.h: Define
5291         ATOMIC_CHAR8_T_LOCK_FREE.
5292         * src/c++11/Makefile.am: Compile with -fchar8_t when compiling
5293         codecvt.cc and limits.cc so that char8_t specializations of
5294         numeric_limits and codecvt and emitted.
5295         * src/c++11/Makefile.in: Likewise.
5296         * src/c++11/codecvt.cc: Define members of
5297         codecvt<char16_t, char8_t, mbstate_t>,
5298         codecvt<char32_t, char8_t, mbstate_t>,
5299         codecvt_byname<char16_t, char8_t, mbstate_t>, and
5300         codecvt_byname<char32_t, char8_t, mbstate_t>.
5301         * src/c++11/limits.cc: Define members of
5302         numeric_limits<char8_t>.
5303         * src/c++98/Makefile.am: Compile with -fchar8_t when compiling
5304         locale_init.cc and localename.cc.
5305         * src/c++98/Makefile.in: Likewise.
5306         * src/c++98/locale_init.cc: Add initialization for the
5307         codecvt<char16_t, char8_t, mbstate_t> and
5308         codecvt<char32_t, char8_t, mbstate_t> facets.
5309         * src/c++98/localename.cc: Likewise.
5310         * testsuite/util/testsuite_abi.cc: Validate ABI bump.
5311
5312 2019-02-18  Wilco Dijkstra  <wdijkstr@arm.com>
5313
5314         * 27_io/filesystem/operations/all.cc: Add dg-require-filesystem-ts.
5315         * 27_io/filesystem/operations/resize_file.cc: Likewise.
5316         * 27_io/filesystem/path/generation/normal2.cc: Likewise.
5317
5318 2019-02-14  Jonathan Wakely  <jwakely@redhat.com>
5319
5320         * doc/xml/manual/status_cxx2020.xml: Update P0887R1 status.
5321         * doc/html/*: Regenerate.
5322
5323         * doc/xml/manual/status_cxx2017.xml: Add P0063R3 to status table.
5324         * doc/html/*: Regenerate.
5325
5326         * doc/xml/manual/intro.xml: Document LWG 2586 status.
5327         * include/bits/uses_allocator.h (__uses_alloc): Use const lvalue
5328         allocator type in is_constructible checks.
5329         * testsuite/20_util/scoped_allocator/69293_neg.cc: Adjust dg-error.
5330         * testsuite/20_util/scoped_allocator/dr2586.cc: New test.
5331         * testsuite/20_util/tuple/cons/allocators.cc: Add test using
5332         problematic type from LWG 2586 discussion.
5333         * testsuite/20_util/uses_allocator/69293_neg.cc: Adjust dg-error.
5334         * testsuite/20_util/uses_allocator/cons_neg.cc: Likewise.
5335
5336         * configure.ac: Check for C11 timespec_get function.
5337         * crossconfig.m4 (freebsd, linux, gnu, cygwin, solaris, netbsd)
5338         (openbsd): Likewise
5339         * config.h.in: Regenerate.
5340         * configure: Regenerate.
5341         * include/c_global/ctime (timespec, timespec_get): Add to namespace
5342         std for C++17 and up.
5343
5344         * doc/xml/manual/intro.xml: Document LWG 2537 status.
5345         * include/bits/stl_queue.h
5346         (priority_queue(const Compare&, const Container&, const Alloc&))
5347         (priority_queue(const Compare&, Container&&, const Alloc&)): Call
5348         make_heap.
5349         * testsuite/23_containers/priority_queue/dr2537.cc: New test.
5350
5351         * doc/xml/manual/intro.xml: Document LWG 2566 status.
5352         * include/bits/stl_queue.h (queue, priority_queue): Add static
5353         assertions to enforce LWG 2566 requirement on value_type.
5354         * include/bits/stl_stack.h (stack): Likewise.
5355
5356         PR middle-end/89303
5357         * testsuite/20_util/enable_shared_from_this/89303.cc: New test.
5358
5359         * doc/xml/manual/intro.xml: Document LWG 2735 status.
5360         * include/bits/std_abs.h: Add comment about LWG 2735.
5361         * testsuite/26_numerics/headers/cstdlib/dr2735.cc: New test.
5362
5363 2019-02-13  Jonathan Wakely  <jwakely@redhat.com>
5364
5365         PR libstdc++/89345
5366         * include/std/version [__cpp_impl_destroying_delete]
5367         (__cpp_lib_destroying_delete): Only define for C++2a and later.
5368         * libsupc++/new [__cpp_impl_destroying_delete]
5369         (__cpp_lib_destroying_delete): Likewise.
5370         (destroying_delete_t, destroying_delete): Likewise, but define even
5371         when __cpp_impl_destroying_delete is not defined.
5372         * testsuite/18_support/destroying_delete.cc: New test.
5373
5374 2019-02-11  Jonathan Wakely  <jwakely@redhat.com>
5375
5376         PR libstdc++/89023
5377         * testsuite/17_intro/headers/c++2011/parallel_mode.cc: New test.
5378         * testsuite/17_intro/headers/c++2014/parallel_mode.cc: New test.
5379         * testsuite/17_intro/headers/c++2017/parallel_mode.cc: New test.
5380         * testsuite/28_regex/headers/regex/parallel_mode.cc: Remove.
5381
5382 2019-02-09  Jonathan Wakely  <jwakely@redhat.com>
5383
5384         PR libstdc++/71044
5385         * include/bits/fs_path.h (path::has_root_name)
5386         (path::has_root_directory, path::has_root_path)
5387         (path::has_relative_path, path::has_parent_path)
5388         (path::has_filename, path::has_stem, path::has_extension)
5389         (path::is_absolute, path::is_relative, path::_M_find_extension): Add
5390         noexcept.
5391         * src/c++17/fs_path.cc (path::has_root_name)
5392         (path::has_root_directory, path::has_root_path)
5393         (path::has_relative_path, path::has_parent_path)
5394         (path::has_filename, path::_M_find_extension): Add noexcept.
5395
5396 2019-02-06  Jonathan Wakely  <jwakely@redhat.com>
5397
5398         PR libstdc++/89102 (partial)
5399         * include/std/type_traits (common_type<>): Define.
5400         (common_type<T>): Derive from common_type<T, T>.
5401         * testsuite/20_util/common_type/requirements/explicit_instantiation.cc:
5402         Test zero-length template argument list.
5403         * testsuite/20_util/common_type/requirements/sfinae_friendly_1.cc:
5404         Test additional single argument cases.
5405         * testsuite/20_util/common_type/requirements/sfinae_friendly_2.cc:
5406         Adjust expected error.
5407
5408 2019-02-05  Jonathan Wakely  <jwakely@redhat.com>
5409
5410         PR libstdc++/89128
5411         * include/bits/stl_queue.h (queue, priority_queue): Add deduction
5412         guides.
5413         * include/bits/stl_stack.h (stack): Likewise.
5414         * testsuite/23_containers/priority_queue/deduction.cc: New test.
5415         * testsuite/23_containers/queue/deduction.cc: New test.
5416         * testsuite/23_containers/stack/deduction.cc: New test.
5417
5418         PR libstdc++/89194
5419         * include/std/type_traits (__is_convertible_helper)
5420         (__is_convertible_helper<_From, _To, false>): Revert changes to
5421         support is_nothrow_convertible.
5422         (__is_nt_convertible_helper): New helper.
5423         (is_nothrow_convertible): Use __is_nt_convertible_helper.
5424
5425         * testsuite/23_containers/vector/modifiers/push_back/49836.cc: Restore
5426         use of CopyConsOnlyType, but also test DelAnyAssign for completeness.
5427
5428         PR libstdc++/89130
5429         * include/bits/alloc_traits.h (__is_copy_insertable_impl): Rename to
5430         __is_alloc_insertable_impl. Replace single type member with two
5431         members, one for each of copy and move insertable.
5432         (__is_move_insertable): New trait for internal use.
5433         * include/bits/stl_vector.h (vector::_S_nothrow_relocate(true_type))
5434         (vector::_S_nothrow_relocate(true_type)): New functions to
5435         conditionally check if __relocate_a can throw.
5436         (vector::_S_use_relocate()): Dispatch to _S_nothrow_relocate based
5437         on __is_move_insertable.
5438         (vector::_S_do_relocate): New overloaded functions to conditionally
5439         call __relocate_a.
5440         (vector::_S_relocate): New function that dispatches to _S_do_relocate
5441         based on _S_use_relocate.
5442         * include/bits/vector.tcc (vector::reserve, vector::_M_realloc_insert)
5443         (vector::_M_default_append): Call _S_relocate instead of __relocate_a.
5444         * testsuite/23_containers/vector/modifiers/push_back/89130.cc: New.
5445
5446         PR libstdc++/89090
5447         * include/bits/stl_uninitialized.h (__relocate_a_1): Make unused
5448         parameter unnamed. Add message to static assertion.
5449         * include/bits/vector.tcc (vector::reserve, vector::_M_realloc_insert)
5450         (vector::_M_default_append): Use _GLIBCXX17_CONSTEXPR for if constexpr
5451         in C++11 code.
5452
5453 2019-02-05  Marc Glisse  <marc.glisse@inria.fr>
5454
5455         PR libstdc++/87106
5456         * include/bits/stl_uninitialized.h (__is_trivially_relocatable):
5457         Rename...
5458         (__is_bitwise_relocatable): ... to this.
5459         (__relocate_a_1): Adapt.
5460         * include/bits/stl_deque.h (__is_trivially_relocatable): Rename...
5461         (__is_bitwise_relocatable): ... to this.
5462
5463 2019-01-30  Jonathan Wakely  <jwakely@redhat.com>
5464
5465         PR libstdc++/89117
5466         * src/c++17/fs_path.cc (path::replace_extension): Erase extension from
5467         final component as well as from _M_pathname. Append the dot using
5468         operator+= instead of only to _M_pathname.
5469         (path::_M_find_extension): Reformat slightly.
5470         * testsuite/27_io/filesystem/path/modifiers/replace_extension.cc:
5471         Add more test cases.
5472
5473 2019-01-30  Ulrich Drepper  <drepper@redhat.com>
5474
5475         * doc/xml/manual/status_cxx2020.xml: Update P0600 entry.
5476
5477 2019-01-29  Jonathan Wakely  <jwakely@redhat.com>
5478
5479         * testsuite/26_numerics/headers/complex/synopsis.cc: Remove incorrect
5480         constexpr specifiers from arg and proj.
5481
5482         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Add missing exports for
5483         __shared_ptr instantiations used by gcc4-compatible ABI.
5484
5485         * include/experimental/forward_list (experimental::erase): Qualify
5486         call to erase_if.
5487         * include/experimental/list (experimental::erase): Likewise.
5488         * include/std/forward_list (std::erase): Likewise.
5489         * include/std/list (std::erase): Likewise.
5490
5491         * testsuite/20_util/reference_wrapper/result_type.cc: Disable for
5492         C++2a.
5493         * testsuite/20_util/reference_wrapper/typedefs-2.cc: Likewise.
5494         * testsuite/20_util/reference_wrapper/typedefs-3.cc: Likewise.
5495         * testsuite/20_util/reference_wrapper/typedefs.cc: Likewise.
5496         * testsuite/30_threads/async/54297.cc: Suppress nodiscard warning.
5497         * testsuite/ext/array_allocator/26875.cc: Likewise.
5498         * testsuite/ext/pool_allocator/allocate_chunk.cc: Likewise.
5499         * testsuite/util/replacement_memory_operators.h: Likewise.
5500         * testsuite/util/testsuite_allocator.h: Likewise.
5501
5502         * include/std/memory_resource (__pool_resource::_M_unpooled): Use
5503         normal mode vector, even for debug mode.
5504         * include/std/vector [_GLIBCXX_DEBUG] (_GLIBCXX_STD_C::pmr::vector):
5505         Define alias template for normal mode vector.
5506
5507 2019-01-28  Jonathan Wakely  <jwakely@redhat.com>
5508
5509         PR libstdc++/68737
5510         * config/locale/generic/c_locale.h (__convert_from_v)
5511         [_GLIBCXX_USE_C99_STDIO]: Also check _GLIBCXX_HAVE_BROKEN_VSNPRINTF.
5512         * config/os/hpux/os_defines.h: Define _GLIBCXX_HAVE_BROKEN_VSNPRINTF.
5513         * include/bits/locale_facets.tcc (num_put::_M_insert_float)
5514         [_GLIBCXX_USE_C99_STDIO]: Also check _GLIBCXX_HAVE_BROKEN_VSNPRINTF.
5515
5516 2019-01-24  Jonathan Wakely  <jwakely@redhat.com>
5517
5518         PR libstdc++/88840
5519         * include/bits/stl_vector.h (vector::__use_relocate): Replace static
5520         data member with static member function _S_use_relocate().
5521         * include/bits/vector.tcc (vector::reserve, vector::_M_realloc_insert)
5522         (vector::_M_default_append): Use _S_use_relocate() instead of
5523         __use_relocate.
5524
5525         * testsuite/27_io/filesystem/path/compare/strings.cc: Only compare
5526         sign of results.
5527
5528 2019-01-22  Jonathan Wakely  <jwakely@redhat.com>
5529
5530         PR libstdc++/88740
5531         * testsuite/util/testsuite_hooks.h [stderr] (VERIFY): Use fprintf to
5532         write to stderr instead of using printf.
5533
5534 2019-01-21  Jakub Jelinek  <jakub@redhat.com>
5535
5536         PR libstdc++/86590
5537         * include/bits/char_traits.h (__constant_string_p,
5538         __constant_char_array_p): Use __builtin_is_constant_evaluated if
5539         available.
5540
5541 2019-01-20  Ulrich Drepper  <drepper@redhat.com>
5542
5543         Implement C++20 P0600r1.
5544         * include/backward/hash_map: Add nodiscard attribute to empty.
5545         * include/backward/hash_set: Likewise.
5546         * backward/hashtable.h: Likewise.
5547         * include/bits/basic_string.h: Likewise.
5548         * include/bits/forward_list.h: Likewise.
5549         * include/bits/hashtable.h: Likewise.
5550         * include/bits/regex.h: Likewise.
5551         * include/bits/stl_deque.h: Likewise.
5552         * include/bits/stl_list.h: Likewise.
5553         * include/bits/stl_map.h: Likewise.
5554         * include/bits/stl_multimap.h: Likewise.
5555         * include/bits/stl_multiset.h: Likewise.
5556         * include/bits/stl_queue.h: Likewise.
5557         * include/bits/stl_set.h: Likewise.
5558         * include/bits/stl_stack.h: Likewise.
5559         * include/bits/stl_tree.h: Likewise.
5560         * include/bits/stl_vector.h: Likewise.
5561         * include/bits/unordered_map.h: Likewise.
5562         * include/bits/unordered_set.h: Likewise.
5563         * include/debug/array: Likewise.
5564         * include/experimental/any: Likewise.
5565         * include/experimental/bits/fs_path.h: Likewise.
5566         * include/experimental/internet: Likewise.
5567         * include/experimental/string_view: Likewise.
5568         * include/ext/pb_ds/detail/bin_search_tree_/info_fn_imps.hpp:
5569         Likewise.
5570         * include/ext/pb_ds/detail/binary_heap_/binary_heap_.hpp:
5571         Likewise.
5572         * include/ext/pb_ds/detail/binary_heap_/info_fn_imps.hpp:
5573         Likewise.
5574         * include/ext/pb_ds/detail/cc_hash_table_map_/cc_ht_map_.hpp:
5575         Likewise.
5576         * include/ext/pb_ds/detail/cc_hash_table_map_/info_fn_imps.hpp:
5577         Likewise.
5578         * include/ext/pb_ds/detail/cc_hash_table_map_/size_fn_imps.hpp:
5579         Likewise.
5580         * include/ext/pb_ds/detail/gp_hash_table_map_/gp_ht_map_.hpp:
5581         Likewise.
5582         * include/ext/pb_ds/detail/gp_hash_table_map_/info_fn_imps.hpp:
5583         Likewise.
5584         * include/ext/pb_ds/detail/left_child_next_sibling_heap_/
5585         info_fn_imps.hpp: Likewise.
5586         * include/ext/pb_ds/detail/left_child_next_sibling_heap_/
5587         left_child_next_sibling_heap_.hpp: Likewise.
5588         * include/ext/pb_ds/detail/list_update_map_/info_fn_imps.hpp:
5589         Likewise.
5590         * include/ext/pb_ds/detail/list_update_map_/lu_map_.hpp:
5591         Likewise.
5592         * include/ext/pb_ds/detail/ov_tree_map_/info_fn_imps.hpp:
5593         Likewise.
5594         * include/ext/pb_ds/detail/ov_tree_map_/ov_tree_map_.hp:
5595         Likewise.
5596         * include/ext/pb_ds/detail/pat_trie_/info_fn_imps.hpp:
5597         Likewise.
5598         * include/ext/pb_ds/detail/pat_trie_/pat_trie_.hpp:
5599         Likewise.
5600         * include/ext/pb_ds/detail/rc_binomial_heap_/rc.hpp:
5601         Likewise.
5602         * include/ext/pb_ds/detail/tree_trace_base.hpp: Likewise.
5603         * include/ext/pb_ds/trie_policy.hpp: Likewise.
5604         * include/ext/rope: Likewise.
5605         * include/ext/slist: Likewise.
5606         * include/ext/vstring.h: Likewise.
5607         * include/profile/array: Likewise.
5608         * include/std/array: Likewise.
5609         * include/tr1/array: Likewise.
5610         * include/tr1/hashtable.h: Likewise.
5611         * include/tr1/regex: Likewise.
5612         * include/tr2/dynamic_bitset: Likewise.
5613         * include/bits/alloc_traits.h: Add nodiscard attribute to
5614         allocate.
5615         * include/experimental/memory_resource: Likewise.
5616         * include/ext/alloc_traits.h: Likewise.
5617         * include/ext/array_allocator.h: Likewise.
5618         * include/ext/bitmap_allocator.h: Likewise.
5619         * include/ext/debug_allocator.h: Likewise.
5620         * include/ext/extptr_allocator.h: Likewise.
5621         * include/ext/mt_allocator.h: Likewise.
5622         * include/ext/new_allocator.h: Likewise.
5623         * include/ext/pool_allocator.h: Likewise.
5624         * include/ext/throw_allocator.h: Likewise.
5625         * include/std/scoped_allocator: Likewise.
5626         * libsupc++/eh_alloc.cc: Likewise.
5627         * include/std/future: Add nodiscard attribute to async.
5628         * libsupc++/new: Add nodiscard attribute to new.
5629
5630 2019-01-18  Jonathan Wakely  <jwakely@redhat.com>
5631
5632         PR libstdc++/87514
5633         PR libstdc++/87520
5634         PR libstdc++/88782
5635         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Export new symbol.
5636         * include/bits/shared_ptr.h
5637         (shared_ptr(_Sp_make_shared_tag, const Alloc&, Args&&...))
5638         (allocate_shared): Change to use new tag type.
5639         * include/bits/shared_ptr_base.h (_Sp_make_shared_tag::_S_eq):
5640         Declare new member function.
5641         (_Sp_alloc_shared_tag): Define new type.
5642         (_Sp_counted_ptr_inplace): Declare __shared_count<_Lp> as a friend.
5643         (_Sp_counted_ptr_inplace::_M_get_deleter) [!__cpp_rtti]: Use
5644         _Sp_make_shared_tag::_S_eq to check type_info.
5645         (__shared_count(Ptr, Deleter),__shared_count(Ptr, Deleter, Alloc)):
5646         Constrain to prevent being called with _Sp_alloc_shared_tag.
5647         (__shared_count(_Sp_make_shared_tag, const _Alloc&, Args&&...)):
5648         Replace constructor with ...
5649         (__shared_count(Tp*&, _Sp_alloc_shared_tag<_Alloc>, Args&&...)): Use
5650         reference parameter so address of the new object can be returned to
5651         the caller. Obtain the allocator from the tag type.
5652         (__shared_ptr(_Sp_make_shared_tag, const Alloc&, Args&&...)): Replace
5653         constructor with ...
5654         (__shared_ptr(_Sp_alloc_shared_tag<Alloc>, Args&&...)): Pass _M_ptr
5655         to the __shared_count constructor.
5656         (__allocate_shared): Change to use new tag type.
5657         * src/c++11/shared_ptr.cc (_Sp_make_shared_tag::_S_eq): Define.
5658
5659 2019-01-17  Jonathan Wakely  <jwakely@redhat.com>
5660
5661         * src/c++17/fs_ops.cc
5662         (equivalent(const path&, const path&, error_code&))
5663         [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Use GetFileInformationByHandle to
5664         compare files instead of relying on incomplete info returned by stat.
5665
5666         PR libstdc++/88884
5667         * src/c++17/fs_ops.cc (absolute(const path&, error_code&)): Do nothing
5668         if the path is already absolute.
5669         [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Normalize root-directory.
5670         [!_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Pass error_code to current_path.
5671
5672         PR libstdc++/88881
5673         * src/c++17/fs_ops.cc (canonical(const path&, error_code&))
5674         [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Normalize path, to match behaviour
5675         of filesystem::exists.
5676         (create_directories(const path&, error_code&)): Add assertions.
5677         (status(const path&, error_code&)) [_GLIBCXX_FILESYSTEM_IS_WINDOWS]:
5678         Add workaround for bug in _wstat for paths with trailing slash.
5679         * testsuite/27_io/filesystem/operations/create_directories.cc: Adjust
5680         for expected behaviour on mingw.
5681         * testsuite/experimental/filesystem/operations/create_directories.cc:
5682         Likewise.
5683         * testsuite/27_io/filesystem/operations/temp_directory_path.cc: Use
5684         "TMP" instead of "TMPDIR" and clean environment before each test. Do
5685         not test permissions on mingw targets.
5686
5687 2019-01-16  Jonathan Wakely  <jwakely@redhat.com>
5688
5689         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Add exports for fstream
5690         constructors and open members taking wide strings. Fix patterns for
5691         filesystem::path members to match wstring_view parameters. Add
5692         exports for shared_ptr members used by directory iterators.
5693         * src/c++17/fs_ops.cc (remove(const path&, error_code&)): Clear the
5694         error code parameter if the file doesn't exist.
5695         * src/filesystem/ops.cc (remove(const path&, error_code&)):
5696         Likewise.
5697         * testsuite/27_io/filesystem/operations/canonical.cc: Fix expected
5698         values for mingw targets, where "/" is not an absolute path. Do not
5699         test symlinks on mingw targets.
5700         * testsuite/experimental/filesystem/operations/canonical.cc: Likewise.
5701         * testsuite/27_io/filesystem/operations/copy.cc: Do not test symlinks
5702         on mingw targets.
5703         * testsuite/experimental/filesystem/operations/copy.cc: Likewise.
5704         * testsuite/27_io/filesystem/operations/create_directories.cc: Check
5705         that each component of the path is created.
5706         * testsuite/experimental/filesystem/operations/create_directories.cc:
5707         Likewise.
5708         * testsuite/27_io/filesystem/operations/exists.cc: Do not test
5709         permissions on mingw targets.
5710         * testsuite/experimental/filesystem/operations/exists.cc: Likewise.
5711         * testsuite/27_io/filesystem/operations/is_empty.cc: Likewise.
5712         * testsuite/experimental/filesystem/operations/is_empty.cc: Likewise.
5713         * testsuite/27_io/filesystem/operations/permissions.cc: XFAIL for
5714         mingw targets.
5715         * testsuite/experimental/filesystem/operations/permissions.cc:
5716         Likewise.
5717         * testsuite/27_io/filesystem/operations/remove.cc: Do not test
5718         symlinks or permissions on mingw targets.
5719         * testsuite/experimental/filesystem/operations/remove.cc: Likewise.
5720         * testsuite/27_io/filesystem/operations/remove_all.cc: Do not test
5721         symlinks on mingw targets.
5722         * testsuite/experimental/filesystem/operations/remove_all.cc:
5723         Likewise.
5724         * testsuite/27_io/filesystem/operations/status.cc: Do not test
5725         permissions on mingw targets.
5726         * testsuite/27_io/filesystem/operations/weakly_canonical.cc: Do not
5727         test symlinks on mingw targets.
5728         * testsuite/experimental/filesystem/operations/space.cc: Fix test
5729         for mingw targets.
5730
5731 2019-02-14  Ulrich Drepper  <drepper@redhat.com>
5732
5733         PR libstdc++/88738
5734         Warn about unused comparisons of shared_ptr/unique_ptr
5735         * include/bits/c++config [_GLIBCXX_NODISCARD]: Define.
5736         * include/bits/shared_ptr.h: Use it for operator ==, !=,
5737         <, <=, >, >= for shared_ptr.
5738         * include/bits/unique_ptr.h: Likewise for unique_ptr.
5739
5740 2019-01-15  Jonathan Wakely  <jwakely@redhat.com>
5741
5742         * include/bits/shared_ptr_base.h (__cpp_lib_shared_ptr_arrays): Define
5743         as 201611L, because P0497R0 changes are supported.
5744         * include/std/version (__cpp_lib_shared_ptr_arrays): Likewise.
5745
5746         * include/bits/erase_if.h [__cplusplus > 201703L]
5747         (__cpp_lib_erase_if): Only define for C++2a.
5748         * include/std/iterator [__cplusplus >= 201402L && !_GLIBCXX_DEBUG]
5749         (__cpp_lib_null_iterators): Define.
5750         * include/std/version [__cplusplus >= 201402L && !_GLIBCXX_DEBUG]
5751         (__cpp_lib_null_iterators): Define.
5752         [__cpp_impl_destroying_delete] (__cpp_lib_destroying_delete): Define.
5753
5754         * doc/xml/manual/status_cxx2017.xml: Document P0032R3 and P0307R2
5755         status.
5756         * include/bits/stl_uninitialized.h (__cpp_lib_raw_memory_algorithms):
5757         Define.
5758         * include/std/any (__cpp_lib_any): Define as 201606L, because P0032R3
5759         changes are supported.
5760         * include/std/optional (__cpp_lib_optional): Likewise.
5761         * include/std/variant (__cpp_lib_variant): Likewise.
5762         * include/std/version [!__STRICT_ANSI__]
5763         (__cpp_lib_uncaught_exceptions): Define as long integer.
5764         [__cplusplus >= 201703L] (__cpp_lib_any)
5765         (__cpp_lib_raw_memory_algorithms, __cpp_lib_uncaught_exceptions)
5766         (__cpp_lib_variant): Define for C++17.
5767         [__cplusplus >= 201703L] (__cpp_lib_optional): Update value and define
5768         as long integer.
5769         * libsupc++/exception (__cpp_lib_uncaught_exceptions): Define as long
5770         integer.
5771
5772         * doc/xml/manual/status_cxx2020.xml: Update P1123R0 status.
5773
5774 2019-01-12  Jonathan Wakely  <jwakely@redhat.com>
5775
5776         PR libstdc++/88811
5777         PR libstdc++/83306
5778         * src/filesystem/path.cc: Fix typo. If first path is empty, show []
5779         before second path.
5780         * testsuite/experimental/filesystem/filesystem_error/cons.cc: New
5781         test.
5782
5783 2019-01-11  Jonathan Wakely  <jwakely@redhat.com>
5784
5785         * doc/xml/manual/intro.xml: Include new section.
5786         * doc/xml/manual/status_cxx2017.xml: Document more
5787         implementation-defined properties of the library.
5788         * doc/xml/manual/status_cxx2020.xml: Document C++2a status.
5789         * doc/html/*: Regenerate.
5790
5791         * include/bits/refwrap.h [__cplusplus > 201703L]
5792         (_Refwrap_base_arg1, _Refwrap_base_arg2, _Reference_wrapper_base)
5793         (_Reference_wrapper_base_memfun): Do not define for C++2a.
5794         (reference_wrapper): Do not derive from _Reference_wrapper_base_memfun
5795         for C++2a.
5796         (reference_wrapper::operator()): Add static assertion.
5797         * testsuite/20_util/reference_wrapper/incomplete.cc: New test.
5798
5799         * include/std/chrono (duration_values::zero(), duration_values::min())
5800         (duration_values::max()): Add noexcept.
5801         (duration::zero(), duration::min(), duration::max()): Likewise.
5802         (time_point::zero(), time_point::min(), time_point::max()): Likewise.
5803         * testsuite/20_util/duration/requirements/noexcept.cc: New test.
5804         * testsuite/20_util/time_point/requirements/noexcept.cc: New test.
5805
5806         * include/std/version (__cpp_lib_erase_if): Move to C++20 group.
5807
5808 2019-01-11  Jakub Jelinek  <jakub@redhat.com>
5809
5810         * include/std/type_traits (__cpp_lib_is_constant_evaluated): Define.
5811         * include/std/version (__cpp_lib_is_constant_evaluated): Define.
5812
5813 2019-01-11  Jonathan Wakely  <jwakely@redhat.com>
5814
5815         PR libstdc++/88802
5816         * include/bits/functional_hash.h (hash<nullptr_t>): Define
5817         specialization for C++17 (P0513R0, LWG 2817).
5818         * testsuite/20_util/hash/nullptr.cc: New test.
5819
5820         PR libstdc++/88125
5821         * config/abi/pre/gnu.ver (GLIBCXX_3.4.6): Remove unused duplicate
5822         pattern for std::basic_stringbuf::str().
5823
5824         * config/abi/pre/gnu.ver (GLIBCXX_3.4): Correct recent changes to
5825         basic_ostream::operator<< patterns.
5826
5827 2019-01-10  Jonathan Wakely  <jwakely@redhat.com>
5828
5829         * testsuite/27_io/filesystem/operations/last_write_time.cc: Fix
5830         test failures on targets with 32-bit time_t.
5831
5832         * include/bits/erase_if.h: Define __cpp_lib_erase_if.
5833         * include/std/deque: Likewise.
5834         * include/std/forward_list: Likewise.
5835         * include/std/list: Likewise.
5836         * include/std/string: Likewise.
5837         * include/std/vector: Likewise.
5838         * include/std/version: Likewise.
5839         * testsuite/21_strings/basic_string/erasure.cc: Test macro.
5840         * testsuite/23_containers/deque/erasure.cc: Likewise.
5841         * testsuite/23_containers/forward_list/erasure.cc: Likewise.
5842         * testsuite/23_containers/list/erasure.cc: Likewise.
5843         * testsuite/23_containers/map/erasure.cc: Likewise.
5844         * testsuite/23_containers/set/erasure.cc: Likewise.
5845         * testsuite/23_containers/unordered_map/erasure.cc: Likewise.
5846         * testsuite/23_containers/unordered_set/erasure.cc: Likewise.
5847         * testsuite/23_containers/vector/erasure.cc: Likewise.
5848
5849         * include/experimental/internet [AI_NUMERICSERV]
5850         (resolver_base::numeric_service): Define conditionally.
5851         * testsuite/experimental/net/internet/resolver/base.cc: Test it
5852         conditionally.
5853         * testsuite/experimental/net/internet/resolver/ops/lookup.cc:
5854         Likewise.
5855
5856 2019-01-10  Ville Voutilainen  <ville.voutilainen@gmail.com>
5857             Jonathan Wakely  <jwakely@redhat.com>
5858
5859         Implement LWG 2221
5860         * config/abi/pre/gnu.ver (GLIBCXX_3.4): Tighten patterns.
5861         (GLIBCXX_3.4.26): Add new exports.
5862         * include/Makefile.am: Add ostream-inst.cc. Move string-inst.cc to
5863         correct list of sources.
5864         * include/Makefile.in: Regenerate.
5865         * include/std/ostream (operator<<(nullptr_t)): New member function.
5866         * src/c++17/ostream-inst.cc: New file.
5867         * testsuite/27_io/basic_ostream/inserters_other/char/lwg2221.cc: New
5868         test.
5869
5870 2019-01-10  Jonathan Wakely  <jwakely@redhat.com>
5871
5872         * testsuite/util/testsuite_fs.h (nonexistent_path): Include name
5873         of the source file containing the caller.
5874         * testsuite/27_io/filesystem/iterators/directory_iterator.cc: Remove
5875         directories created by test.
5876         * testsuite/27_io/filesystem/iterators/recursive_directory_iterator.cc:
5877         Likewise.
5878         * testsuite/experimental/filesystem/iterators/directory_iterator.cc:
5879         Likewise.
5880         * testsuite/experimental/filesystem/iterators/
5881         recursive_directory_iterator.cc: Likewise.
5882
5883 2019-01-10  Jakub Jelinek  <jakub@redhat.com>
5884
5885         PR tree-optimization/88775
5886         * include/bits/stl_function.h (greater<_Tp*>::operator(),
5887         less<_Tp*>::operator(), greater_equal<_Tp*>::operator(),
5888         less_equal<_Tp*>::operator()): Use __builtin_is_constant_evaluated
5889         instead of __builtin_constant_p if available.  Don't bother with
5890         the pointer comparison in C++11 and earlier.
5891
5892 2019-01-09  Sandra Loosemore  <sandra@codesourcery.com>
5893
5894         PR other/16615
5895
5896         * include/ext/bitmap_allocator.h: Mechanically replace "can not"
5897         with "cannot".
5898
5899 2019-01-09  Jonathan Wakely  <jwakely@redhat.com>
5900
5901         * testsuite/libstdc++-prettyprinters/cxx17.cc: Fix expected output
5902         for filesystem::path. Give variables more distinctive names.
5903
5904         * include/std/optional (_Optional_payload_base::_M_copy_assign): New
5905         member function to perform non-trivial assignment.
5906         (_Optional_payload_base::_M_move_assign): Likewise.
5907         (_Optional_payload<T, true, false, true>::operator=)
5908         (_Optional_payload<T, true, true, false>::operator=)
5909         (_Optional_payload<T, true, false, false>::operator=): Call
5910         _M_copy_assign and/or _M_move_assign to do non-trivial assignments.
5911
5912         PR libstdc++/88204
5913         * testsuite/26_numerics/complex/operators/more_constexpr.cc: Do not
5914         test std::complex<long double> if long double format is IBM128.
5915         * testsuite/26_numerics/complex/requirements/more_constexpr.cc:
5916         Likewise.
5917
5918 2019-01-08  Jonathan Wakely  <jwakely@redhat.com>
5919
5920         * testsuite/libstdc++-prettyprinters/compat.cc: Test printer support
5921         for old std::unique_ptr layout.
5922         * testsuite/libstdc++-prettyprinters/cxx17.cc: Fix std::variant test
5923         to become valueless. Add filesystem::path tests.
5924
5925         PR libstdc++/87855
5926         * include/std/optional (_Optional_payload_base): New class template
5927         for common code hoisted from _Optional_payload specializations. Use
5928         a template for the union, to allow a partial specialization for
5929         types with non-trivial destructors. Add constructors for in-place
5930         initialization to the union.
5931         (_Optional_payload(bool, const _Optional_payload&)): Use _M_construct
5932         to perform non-trivial copy construction, instead of relying on
5933         non-standard copy elision in a delegating constructor.
5934         (_Optional_payload(bool, _Optional_payload&&)): Likewise for
5935         non-trivial move construction.
5936         (_Optional_payload): Derive from _Optional_payload_base and use it
5937         for everything except the non-trivial assignment operators, which are
5938         defined as needed.
5939         (_Optional_payload<false, C, M>): Derive from the specialization
5940         _Optional_payload<true, false, false> and add a destructor.
5941         (_Optional_base_impl::_M_destruct, _Optional_base_impl::_M_reset):
5942         Forward to corresponding members of _Optional_payload.
5943         (_Optional_base_impl::_M_is_engaged, _Optional_base_impl::_M_get):
5944         Hoist common members from _Optional_base.
5945         (_Optional_base): Make all members and base class public.
5946         (_Optional_base::_M_get, _Optional_base::_M_is_engaged): Move to
5947         _Optional_base_impl.
5948         * python/libstdcxx/v6/printers.py (StdExpOptionalPrinter): Add
5949         support for new std::optional layout.
5950         * testsuite/libstdc++-prettyprinters/compat.cc: New test.
5951
5952         PR libstdc++/88066
5953         * include/bits/locale_conv.h: Use <> for includes not "".
5954         * include/ext/random: Likewise.
5955         * include/ext/vstring.h: Likewise.
5956
5957 2019-01-08  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
5958
5959         * config/abi/pre/gnu.ver (GLIBCXX_3.4): Tighten existing patterns.
5960         (GLIBCXX_3.4.21): Likewise.
5961
5962 2019-01-08  Jonathan Wakely  <jwakely@redhat.com>
5963
5964         PR libstdc++/88749
5965         * src/filesystem/ops.cc (last_write_time): Fix preprocessor condition
5966         to match the one that controls whether utimbuf and utime are declared.
5967
5968 2019-01-07  Jonathan Wakely  <jwakely@redhat.com>
5969
5970         PR libstdc++/87787
5971         * include/bits/char_traits.h (char_traits::move): Do not pass null
5972         pointers to memmove.
5973         * include/bits/locale_facets.h
5974         (ctype<char>::widen(const char*, const char*, char*)): Do not
5975         pass null pointers to memcpy.
5976         (ctype<char>::narrow(const char*, const char*, char, char*)):
5977         Likewise.
5978         (ctype<char>::do_widen(const char*, const char*, char*)):
5979         Likewise.
5980         (ctype<char>::do_narrow(const char*, const char*, char, char*)):
5981         Likewise.
5982
5983         * doc/xml/manual/spine.xml: Update copyright years.
5984         * doc/xml/manual/status_cxx2017.xml: Adjust note about -lstdc++fs.
5985         * doc/xml/manual/using.xml: Remove requirement to link with -lstdc++fs
5986         for C++17 filesystem library.
5987         * doc/html/*: Regenerate.
5988
5989         * acinclude.m4 (GLIBCXX_CHECK_FILESYSTEM_DEPS): Check for truncate.
5990         * config.h.in: Regenerate.
5991         * config/abi/pre/gnu.ver: Order patterns for filesystem operations
5992         alphabetically and add missing entries for copy_symlink,
5993         hard_link_count, rename, and resize_file.
5994         * configure: Regenerate.
5995         * src/c++17/fs_ops.cc (resize_file): Remove #if so posix::truncate is
5996         used unconditionally.
5997         * src/filesystem/ops-common.h (__gnu_posix::truncate)
5998         [!_GLIBCXX_HAVE_TRUNCATE]: Provide fallback definition that only
5999         supports truncating to zero length.
6000         * testsuite/27_io/filesystem/operations/all.cc: New test.
6001         * testsuite/27_io/filesystem/operations/resize_file.cc: New test.
6002
6003 2019-01-06  Jonathan Wakely  <jwakely@redhat.com>
6004
6005         PR libstdc++/86756
6006         * acinclude.m4 (GLIBCXX_CHECK_FILESYSTEM_DEPS): Check for utime and
6007         lstat and define _GLIBCXX_USE_UTIME and _GLIBCXX_USE_LSTAT.
6008         * config.h.in: Regenerate.
6009         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Export symbols for
6010         remaining std::filesystem types and functions.
6011         * configure: Regenerate.
6012         * src/c++17/Makefile.am: Add C++17 filesystem sources.
6013         * src/c++17/Makefile.in: Regenerate.
6014         * src/c++17/cow-fs_dir.cc: Move src/filesystem/cow-std-dir.cc to
6015         here, and change name of included file.
6016         * src/c++17/cow-fs_ops.cc: Move src/filesystem/cow-std-ops.cc to
6017         here, and change name of included file.
6018         * src/c++17/fs_dir.cc: Move src/filesystem/std-dir.cc to here. Change
6019         path to dir-common.h.
6020         * src/c++17/fs_ops.cc: Move src/filesystem/std-ops.cc to here. Change
6021         path to ops-common.h. Disable -Wunused-parameter warnings.
6022         (internal_file_clock): Define unconditionally.
6023         [!_GLIBCXX_HAVE_SYS_STAT_H] (internal_file_clock::from_stat): Do not
6024         define.
6025         (do_copy_file, do_space): Move definitions to ops.common.h.
6026         (copy, file_size, hard_link_count, last_write_time, space): Only
6027         perform operation when _GLIBCXX_HAVE_SYS_STAT_H is defined, otherwise
6028         report an error.
6029         (last_write_time, read_symlink): Remove unused attributes from
6030         parameters.
6031         * src/filesystem/Makefile.am: Remove C++17 filesystem sources.
6032         * src/filesystem/Makefile.in: Regenerate.
6033         * src/filesystem/cow-std-dir.cc: Move to src/c++17/cow-fs_dir.cc.
6034         * src/filesystem/cow-std-ops.cc: Move to src/c++17/cow-fs_ops.cc.
6035         * src/filesystem/std-dir.cc: Move to src/c++17/fs_dir.cc.
6036         * src/filesystem/std-ops.cc: Move to src/c++17/fs_ops.cc.
6037         * src/filesystem/dir-common.h [!_GLIBCXX_HAVE_DIRENT_H]: Define
6038         dummy types and functions instead of using #error.
6039         * src/filesystem/dir.cc [!_GLIBCXX_HAVE_DIRENT_H]: Use #error.
6040         * src/filesystem/ops-common.h [!_GLIBCXX_USE_LSTAT] (lstat): Define
6041         in terms of stat.
6042         [!_GLIBCXX_HAVE_UNISTD_H]: Define dummy types and functions.
6043         (do_copy_file, do_space): Move definitions here from std-ops.cc.
6044         * src/filesystem/ops.cc: Adjust calls to do_copy_file and do_space
6045         to account for new namespace.
6046         * testsuite/27_io/filesystem/directory_entry/86597.cc: Remove
6047         -lstdc++fs from dg-options.
6048         * testsuite/27_io/filesystem/directory_entry/lwg3171.cc: Likewise.
6049         * testsuite/27_io/filesystem/file_status/1.cc: Likewise.
6050         * testsuite/27_io/filesystem/filesystem_error/cons.cc: Likewise.
6051         * testsuite/27_io/filesystem/filesystem_error/copy.cc: Likewise.
6052         * testsuite/27_io/filesystem/iterators/directory_iterator.cc:
6053         Likewise.
6054         * testsuite/27_io/filesystem/iterators/pop.cc: Likewise.
6055         * testsuite/27_io/filesystem/iterators/recursive_directory_iterator.cc:
6056         Likewise.
6057         * testsuite/27_io/filesystem/operations/absolute.cc: Likewise.
6058         * testsuite/27_io/filesystem/operations/canonical.cc: Likewise.
6059         * testsuite/27_io/filesystem/operations/copy.cc: Likewise.
6060         * testsuite/27_io/filesystem/operations/copy_file.cc: Likewise.
6061         * testsuite/27_io/filesystem/operations/create_directories.cc:
6062         Likewise.
6063         * testsuite/27_io/filesystem/operations/create_directory.cc: Likewise.
6064         * testsuite/27_io/filesystem/operations/create_symlink.cc: Likewise.
6065         * testsuite/27_io/filesystem/operations/current_path.cc: Likewise.
6066         * testsuite/27_io/filesystem/operations/equivalent.cc: Likewise.
6067         * testsuite/27_io/filesystem/operations/exists.cc: Likewise.
6068         * testsuite/27_io/filesystem/operations/file_size.cc: Likewise.
6069         * testsuite/27_io/filesystem/operations/is_empty.cc: Likewise.
6070         * testsuite/27_io/filesystem/operations/last_write_time.cc: Likewise.
6071         * testsuite/27_io/filesystem/operations/permissions.cc: Likewise.
6072         * testsuite/27_io/filesystem/operations/proximate.cc: Likewise.
6073         * testsuite/27_io/filesystem/operations/read_symlink.cc: Likewise.
6074         * testsuite/27_io/filesystem/operations/relative.cc: Likewise.
6075         * testsuite/27_io/filesystem/operations/remove.cc: Likewise.
6076         * testsuite/27_io/filesystem/operations/remove_all.cc: Likewise.
6077         * testsuite/27_io/filesystem/operations/space.cc: Likewise.
6078         * testsuite/27_io/filesystem/operations/status.cc: Likewise.
6079         * testsuite/27_io/filesystem/operations/symlink_status.cc: Likewise.
6080         * testsuite/27_io/filesystem/operations/temp_directory_path.cc:
6081         Likewise.
6082         * testsuite/27_io/filesystem/operations/weakly_canonical.cc: Likewise.
6083
6084
6085         PR libstdc++/86756
6086         * config/abi/pre/gnu.ver (GLIBCXX_3.4): Make various patterns for
6087         typeinfo and vtables less greedy.
6088         (GLIBCXX_3.4.26): Export symbols for std::filesystem::path.
6089         * src/c++17/Makefile.am: Add fs_path.cc and cow-fs_path.cc.
6090         * src/c++17/Makefile.in: Regenerate.
6091         * src/c++17/cow-fs_path.cc: Move src/filesystem/cow-std-path.cc to
6092         here, and change name of included file.
6093         * src/c++17/fs_path.cc: Move src/filesystem/std-path.cc to here.
6094         * src/filesystem/Makefile.am: Remove std-path.cc and cow-std-path.cc
6095         from sources.
6096         * src/filesystem/Makefile.in: Regenerate.
6097         * src/filesystem/cow-std-path.cc: Move to src/c++17/cow-fs_path.cc.
6098         * src/filesystem/std-path.cc: Move to src/c++17/fs_path.cc.
6099         * testsuite/27_io/filesystem/path/append/path.cc: Remove -lstdc++fs
6100         from dg-options and remove dg-require-filesystem-ts.
6101         * testsuite/27_io/filesystem/path/append/source.cc: Likewise.
6102         * testsuite/27_io/filesystem/path/assign/assign.cc: Likewise.
6103         * testsuite/27_io/filesystem/path/assign/copy.cc: Likewise.
6104         * testsuite/27_io/filesystem/path/compare/compare.cc: Likewise.
6105         * testsuite/27_io/filesystem/path/compare/lwg2936.cc: Likewise.
6106         * testsuite/27_io/filesystem/path/compare/path.cc: Likewise.
6107         * testsuite/27_io/filesystem/path/compare/strings.cc: Likewise.
6108         * testsuite/27_io/filesystem/path/concat/path.cc: Likewise.
6109         * testsuite/27_io/filesystem/path/concat/strings.cc: Likewise.
6110         * testsuite/27_io/filesystem/path/construct/80762.cc: Likewise.
6111         * testsuite/27_io/filesystem/path/construct/copy.cc: Likewise.
6112         * testsuite/27_io/filesystem/path/construct/default.cc: Likewise.
6113         * testsuite/27_io/filesystem/path/construct/format.cc: Likewise.
6114         * testsuite/27_io/filesystem/path/construct/locale.cc: Likewise.
6115         * testsuite/27_io/filesystem/path/construct/range.cc: Likewise.
6116         * testsuite/27_io/filesystem/path/construct/string_view.cc: Likewise.
6117         * testsuite/27_io/filesystem/path/decompose/extension.cc: Likewise.
6118         * testsuite/27_io/filesystem/path/decompose/filename.cc: Likewise.
6119         * testsuite/27_io/filesystem/path/decompose/parent_path.cc: Likewise.
6120         * testsuite/27_io/filesystem/path/decompose/relative_path.cc: Likewise.
6121         * testsuite/27_io/filesystem/path/decompose/root_directory.cc:
6122         Likewise.
6123         * testsuite/27_io/filesystem/path/decompose/root_name.cc: Likewise.
6124         * testsuite/27_io/filesystem/path/decompose/root_path.cc: Likewise.
6125         * testsuite/27_io/filesystem/path/decompose/stem.cc: Likewise.
6126         * testsuite/27_io/filesystem/path/generation/normal.cc: Likewise.
6127         * testsuite/27_io/filesystem/path/generation/normal2.cc: Likewise.
6128         * testsuite/27_io/filesystem/path/generation/proximate.cc: Likewise.
6129         * testsuite/27_io/filesystem/path/generation/relative.cc: Likewise.
6130         * testsuite/27_io/filesystem/path/generic/generic_string.cc: Likewise.
6131         * testsuite/27_io/filesystem/path/itr/components.cc: Likewise.
6132         * testsuite/27_io/filesystem/path/itr/traversal.cc: Likewise.
6133         * testsuite/27_io/filesystem/path/modifiers/clear.cc: Likewise.
6134         * testsuite/27_io/filesystem/path/modifiers/make_preferred.cc:
6135         Likewise.
6136         * testsuite/27_io/filesystem/path/modifiers/remove_filename.cc:
6137         Likewise.
6138         * testsuite/27_io/filesystem/path/modifiers/replace_extension.cc:
6139         Likewise.
6140         * testsuite/27_io/filesystem/path/modifiers/replace_filename.cc:
6141         Likewise.
6142         * testsuite/27_io/filesystem/path/modifiers/swap.cc: Likewise.
6143         * testsuite/27_io/filesystem/path/native/string.cc: Likewise.
6144         * testsuite/27_io/filesystem/path/nonmember/append.cc: Likewise.
6145         * testsuite/27_io/filesystem/path/nonmember/hash_value.cc: Likewise.
6146         * testsuite/27_io/filesystem/path/query/empty.cc: Likewise.
6147         * testsuite/27_io/filesystem/path/query/has_extension.cc: Likewise.
6148         * testsuite/27_io/filesystem/path/query/has_filename.cc: Likewise.
6149         * testsuite/27_io/filesystem/path/query/has_parent_path.cc: Likewise.
6150         * testsuite/27_io/filesystem/path/query/has_relative_path.cc: Likewise.
6151         * testsuite/27_io/filesystem/path/query/has_root_directory.cc:
6152         Likewise.
6153         * testsuite/27_io/filesystem/path/query/has_root_name.cc: Likewise.
6154         * testsuite/27_io/filesystem/path/query/has_root_path.cc: Likewise.
6155         * testsuite/27_io/filesystem/path/query/has_stem.cc: Likewise.
6156         * testsuite/27_io/filesystem/path/query/is_absolute.cc: Likewise.
6157         * testsuite/27_io/filesystem/path/query/is_relative.cc: Likewise.
6158
6159         PR libstdc++/87431
6160         * include/std/variant (_Variant_storage<true, _Types...>::_M_valid):
6161         Check is_trivially_copyable instead of is_scalar.
6162         (variant::emplace<N, Args>(Args&&...)): If construction of the new
6163         contained value can throw and its type is trivially copyable then
6164         construct into a temporary variant and move from it, to provide the
6165         strong exception safety guarantee.
6166         (variant::emplace<N, U, Args>(initializer_list<U>, Args&&...)):
6167         Likewise.
6168         * testsuite/20_util/variant/87431.cc: New test.
6169         * testsuite/20_util/variant/run.cc: Adjust test so that throwing
6170         conversion causes valueless state.
6171
6172         PR libstdc++/88607
6173         * testsuite/17_intro/headers/c++1998/charset.cc: New test.
6174         * testsuite/17_intro/headers/c++2011/charset.cc: New test.
6175         * testsuite/17_intro/headers/c++2014/charset.cc: New test.
6176         * testsuite/17_intro/headers/c++2017/charset.cc: New test.
6177         * testsuite/17_intro/headers/c++2020/charset.cc: New test.
6178
6179 2019-01-05  Jonathan Wakely  <jwakely@redhat.com>
6180
6181         * include/bits/fs_fwd.h (__file_clock): Define new clock.
6182         (file_time_type): Redefine in terms of __file_clock.
6183         * src/filesystem/ops-common.h (file_time): Add FIXME comment about
6184         overflow.
6185         * src/filesystem/std-ops.cc (is_set(perm_options, perm_options)): Give
6186         internal linkage.
6187         (internal_file_lock): New helper type for accessing __file_clock.
6188         (do_copy_file): Use internal_file_lock to convert system time to
6189         file_time_type.
6190         (last_write_time(const path&, error_code&)): Likewise.
6191         (last_write_time(const path&, file_time_type, error_code&)): Likewise.
6192
6193 2019-01-04  Jonathan Wakely  <jwakely@redhat.com>
6194
6195         * config/abi/pre/gnu.ver (GLIBCXX_3.4.21): Make patterns less greedy
6196         for const member functions of std::basic_string.
6197         (GLIBCXX_3.4.26): Export member functions of std::basic_string added
6198         in C++17.
6199         * include/bits/basic_string.h (basic_string(__sv_wrapper, const A&)):
6200         Make non-standard constructor private.
6201         [!_GLIBCXX_USE_CXX11_ABI] (basic_string(__sv_wrapper, const A&)):
6202         Likewise.
6203         * include/bits/basic_string.tcc (std::string, std::wstring): Declare
6204         explicit instantiations for C++17 as well as earlier dialects.
6205         * src/c++17/Makefile.am: Add new source files.
6206         * src/c++17/Makefile.in: Regenerate.
6207         * src/c++17/cow-string-inst.cc: New file defining explicit
6208         instantiations for basic_string member functions added in C++17.
6209         * src/c++17/string-inst.cc: Likewise.
6210
6211         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Export allocator-extended
6212         copy/move constructors for old std::basic_string.
6213         * include/bits/basic_string.h [!_GLIBCXX_USE_CXX11_ABI]
6214         (basic_string::reference, basic_string::const_reference): Define
6215         as plain references for C++11 and later.
6216         (basic_string::basic_string()): Put constructor body outside
6217         preprocessor conditional groups.
6218         (basic_string::basic_string(basic_string&&)): Move _Alloc_hider
6219         instead of copying it.
6220         (basic_string::basic_string(const basic_string&, const _Alloc&)):
6221         Define.
6222         (basic_string::basic_string(basic_string&&, const _Alloc&)):
6223         Define.
6224         * include/bits/fs_path.h [!_GLIBCXX_USE_CXX11_ABI]: Remove special
6225         cases for old basic_string.
6226         * testsuite/21_strings/basic_string/cons/char/8.cc: Test
6227         allocator-extended constructors unconditionally. Add extra members to
6228         allocator type when using old string ABI.
6229         * testsuite/21_strings/basic_string/allocator/71964.cc: Enable test
6230         for old string ABI.
6231         * testsuite/21_strings/basic_string/cons/wchar_t/8.cc: Likewise.
6232
6233         * testsuite/23_containers/list/61347.cc: Avoid spurious failure when
6234         -fno-inline added to test flags.
6235
6236         * testsuite/21_strings/basic_string/requirements/
6237         explicit_instantiation/debug.cc: Remove XFAIL for old ABI.
6238
6239         * testsuite/27_io/filesystem/filesystem_error/copy.cc: Fix static
6240         assertion failures with old std::string ABI.
6241
6242         * include/bits/fs_path.h (path::_List::erase): Replace both overloads
6243         with ...
6244         (path::pop_back(), path::_M_erase_from(const_iterator)): New member
6245         functions that will only erase elements at the end.
6246         * src/filesystem/std-path.cc (path::_List::_Impl::pop_back()): Define.
6247         (path::_List::_Impl::_M_erase_from(const_iterator)): Define.
6248         (path::_List::operator=(const _List&)): Use _M_erase_from(p) instead
6249         of erase(p, end()).
6250         (path::_List::pop_back()): Define.
6251         (path::_List::_M_erase_from(const_iterator)): Define.
6252         (path::operator/=(const path&)): Use pop_back to remove last component
6253         and _M_erase_from to remove multiple components.
6254         (path::_M_append(basic_string_view<value_type>)): Likewise.
6255         (path::operator+=(const path&)): Likewise.
6256         (path::_M_concat(basic_string_view<value_type>)): Likewise.
6257         (path::remove_filename()): Likewise.
6258         (path::lexically_normal()): Use _List::_Impl iterators instead of
6259         path::iterator. Use pop_back to remove components from the end. Clear
6260         trailing filename, instead of using erase(const_iterator) to remove
6261         a non-final component.
6262         * testsuite/27_io/filesystem/path/generation/normal.cc: Test
6263         additional cases.
6264         * testsuite/27_io/filesystem/path/generation/normal2.cc: New test.
6265
6266         * src/filesystem/std-path.cc (path::operator+=(const path&)): Fix
6267         incorrect treatment of empty filename after trailing slash.
6268         * testsuite/27_io/filesystem/path/concat/path.cc: Test problem case.
6269
6270         * testsuite/21_strings/basic_string/modifiers/assign/char/
6271         move_assign_optim.cc: Avoid spurious failure when -fno-inline added
6272         to test flags.
6273         * testsuite/21_strings/basic_string/modifiers/assign/wchar_t/
6274         move_assign_optim.cc: Likewise.
6275
6276 2019-01-03  Jonathan Wakely  <jwakely@redhat.com>
6277             Jakub Jelinek  <jakub@redhat.com>
6278
6279         PR libstdc++/88607
6280         * include/experimental/memory: Replace UTF-8 quote characters.
6281         * include/std/future: Replace UTF-8 "em dash" characters.
6282
6283 2019-01-03  Jonathan Wakely  <jwakely@redhat.com>
6284
6285         PR libstdc++/88607
6286         * include/bits/forward_list.h: Replace UTF-8 "ligature fi" character.
6287         * include/debug/forward_list: Likewise.
6288         * include/experimental/bits/shared_ptr.h: Remove UTF-8 "section sign"
6289         character.
6290         * include/experimental/chrono: Likewise.
6291         * include/experimental/functional: Likewise.
6292         * include/experimental/ratio: Likewise.
6293         * include/experimental/system_error: Likewise.
6294         * include/experimental/tuple: Likewise.
6295         * include/experimental/type_traits: Likewise.
6296         * include/parallel/workstealing.h: Replace UTF-8 "en dash" character.
6297         * include/parallel/multiseq_selection.h: Likewise.
6298
6299         PR libstdc++/88681
6300         * config/abi/pre/gnu.ver: Add missing exports.
6301         * testsuite/22_locale/collate_byname/88681.cc: New test.
6302         * testsuite/22_locale/time_get/get/char/88681.cc: New test.
6303         * testsuite/22_locale/time_get/get/wchar_t/88681.cc: New test.
6304
6305 2019-01-02  Jonathan Wakely  <jwakely@redhat.com>
6306
6307         * testsuite/23_containers/map/cons/deduction.cc: Test deduction from
6308         initializer_list<value_type> and from input iterator ranges.
6309         * testsuite/23_containers/multimap/cons/deduction.cc: Likewise.
6310
6311         * testsuite/experimental/string_view/element_access/char/empty.cc:
6312         Fix year range in copyright header.
6313
6314 2019-01-02  Joel Brobecker  <brobecker@adacore.com>
6315
6316         * testsuite/21_strings/basic_string_view/element_access/char/empty.cc:
6317         Fix year range in copyright header.
6318
6319 2019-01-01  Jakub Jelinek  <jakub@redhat.com>
6320
6321         Update copyright years.
6322 \f
6323 Copyright (C) 2019 Free Software Foundation, Inc.
6324
6325 Copying and distribution of this file, with or without modification,
6326 are permitted in any medium without royalty provided the copyright
6327 notice and this notice are preserved.