libstdc++-v3/ChangeLog

   1 2019-04-29  Jonathan Wakely  <jwakely@redhat.com>
   2
   3         * include/bits/stl_bvector.h (vector<bool>::empty()): Add nodiscard
   4         attribute.
   5
   6         * include/bits/stl_iterator_base_types.h (_Iter_base): Remove unused
   7         class template and partial specialization.
   8
   9         PR libstdc++/87982
  10         * include/bits/stl_algo.h (generate_n): Convert _Size parameter to
  11         an integral type.
  12         * include/bits/stl_algobase.h (__size_to_integer): New overloaded
  13         functions to convert a value to an integral type.
  14         (__fill_n_a, __fill_n_a): Assert that __n is already an integral type.
  15         (fill_n): Convert _Size parameter to an integral type.
  16         * testsuite/25_algorithms/fill_n/87982.cc: New test.
  17         * testsuite/25_algorithms/fill_n/87982_neg.cc: New test.
  18         * testsuite/25_algorithms/fill_n/dr426.cc: New test.
  19         * testsuite/25_algorithms/generate_n/87982.cc: New test.
  20         * testsuite/25_algorithms/generate_n/87982_neg.cc: New test.
  21         * testsuite/25_algorithms/generate_n/dr426.cc: New test.
  22
  23 2019-04-28  Nina Dinka Ranns  <dinka.ranns@gmail.com>
  24
  25         Adding noexcept-specification on tuple constructors (LWG 2899)
  26         * libstdc++-v3/include/std/tuple:
  27         (tuple()): Add noexcept-specification.
  28         (tuple(const _Elements&...)): Likewise
  29         (tuple(_UElements&&...)): Likewise
  30         (tuple(const tuple<_UElements...>&)): Likewise
  31         (tuple(tuple<_UElements...>&&)): Likewise
  32         (tuple(const _T1&, const _T2&)): Likewise
  33         (tuple(_U1&&, _U2&&)): Likewise
  34         (tuple(const tuple<_U1, _U2>&): Likewise
  35         (tuple(tuple<_U1, _U2>&&): Likewise
  36         (tuple(const pair<_U1, _U2>&): Likewise
  37         (tuple(pair<_U1, _U2>&&): Likewise
  38         * libstdc++-v3/testsuite/20_util/tuple/cons/noexcept_specs.cc: New
  39
  40 2019-04-27  Marc Glisse  <marc.glisse@inria.fr>
  41
  42         PR libstdc++/87106
  43         * include/bits/stl_uninitialized.h (__relocate_object_a): Mark the
  44         arguments with __restrict.
  45
  46 2019-04-26  H.J. Lu  <hongjiu.lu@intel.com>
  47
  48         * config/abi/post/x86_64-linux-gnu/x32/baseline_symbols.txt: Updated.
  49
  50 2019-04-26  Jonathan Wakely  <jwakely@redhat.com>
  51
  52         * include/experimental/bits/fs_path.h
  53         (path::_S_convert_loc<_InputIterator>): Create const std::string to
  54         avoid redundant call to _S_convert_loc with non-const pointers.
  55
  56         * testsuite/20_util/variant/run.cc: Use a new Hashable type to test
  57         hashing, because pmr::string depends on _GLIBCXX_USE_CXX11_ABI==1.
  58         * testsuite/21_strings/basic_string/hash/hash.cc
  59         [!_GLIBCXX_USE_CXX11_ABI]: Don't test pmr strings.
  60         * testsuite/21_strings/basic_string/hash/hash_char8_t.cc
  61         [!_GLIBCXX_USE_CXX11_ABI]: Likewise.
  62
  63         * config/abi/pre/gnu.ver (GLIBCXX_3.4): Replace wildcard that matches
  64         wstring::_M_replace_dispatch with more specific patterns.
  65         * include/bits/fs_path.h (path::_S_convert_loc<_InputIterator>):
  66         Create const std::string to avoid redundant call to _S_convert_loc
  67         with non-const pointers.
  68         * include/bits/locale_conv.h (__do_str_codecvt): Use if-constexpr to
  69         avoid unnecessary basic_string::assign instantiations.
  70
  71         * include/std/memory (__uses_alloc_args): Add string-literal to
  72         static_assert, to match the one in __uses_alloc.
  73         [__cpp_concepts] (_Std_pair): Use C++2a syntax for concept.
  74         * testsuite/20_util/polymorphic_allocator/construct_c++2a.cc: Check
  75         for recursive uses-allocator construction of nested pairs.
  76         * testsuite/20_util/scoped_allocator/construct_pair_c++2a.cc:: Add
  77         comment.
  78
  79 2019-04-26  Jakub Jelinek  <jakub@redhat.com>
  80
  81         * config/abi/post/s390x-linux-gnu/32/baseline_symbols.txt: Update.
  82         * config/abi/post/s390-linux-gnu/baseline_symbols.txt: Update.
  83         * config/abi/post/powerpc-linux-gnu/baseline_symbols.txt: Update.
  84         * config/abi/post/powerpc64-linux-gnu/32/baseline_symbols.txt: Update.
  85
  86         * config/abi/post/x86_64-linux-gnu/baseline_symbols.txt: Update.
  87         * config/abi/post/x86_64-linux-gnu/32/baseline_symbols.txt: Update.
  88         * config/abi/post/i386-linux-gnu/baseline_symbols.txt: Update.
  89         * config/abi/post/i486-linux-gnu/baseline_symbols.txt: Update.
  90         * config/abi/post/aarch64-linux-gnu/baseline_symbols.txt: Update.
  91         * config/abi/post/s390x-linux-gnu/baseline_symbols.txt: Update.
  92         * config/abi/post/powerpc64-linux-gnu/baseline_symbols.txt: Update.
  93
  94 2019-04-25  Jonathan Wakely  <jwakely@redhat.com>
  95
  96         PR libstdc++/90239
  97         * doc/xml/manual/status_cxx2020.xml: Amend P0591R4 status.
  98         * include/std/scoped_allocator [__cplusplus > 201703L]
  99         (scoped_allocator_adaptor::construct): Define in terms of
 100         uses_allocator_construction_args, as per P0591R4.
 101         * testsuite/20_util/scoped_allocator/construct_pair_c++2a.cc: New test.
 102         * testsuite/util/testsuite_allocator.h: Remove name of unused
 103         parameter.
 104
 105 2019-04-24  Jonathan Wakely  <jwakely@redhat.com>
 106
 107         * doc/xml/manual/status_cxx2017.xml: Document P0024R2 status.
 108         * doc/html/*: Regenerate.
 109
 110         * include/bits/fs_path.h (operator<, operator<=, operator>)
 111         (operator>=, operator==, operator!=): Make hidden friends, as per
 112         LWG 3065.
 113         * testsuite/27_io/filesystem/path/native/string-char8_t.cc: Fix
 114         string type in test.
 115         * testsuite/27_io/filesystem/path/native/string.cc: Likewise.
 116
 117         * include/std/any (any::any(ValueType&&)): Use __and_v.
 118         * include/std/numeric (midpoint(T, T, T), midpoint(T*, T*, T*)):
 119         Likewise.
 120
 121         * include/std/tuple (apply): Use remove_reference_t instead of decay_t
 122         as per P0777R1.
 123         * include/std/type_traits (__result_of_memfun): Use remove_reference
 124         instead of __remove_cvref_t and remove redundant is_same check.
 125         (__inv_unwrap): Use __remove_cvref_t instead of decay_t.
 126
 127         * include/experimental/string_view (basic_string_view::pointer)
 128         (basic_string_view::reference): Fix to refer to non-const value_type.
 129         * include/bits/basic_string.h (basic_string): Use __sv_check and
 130         __sv_limit instead of basic_string_view::_M_check and
 131         basic_string_view::_M_limit.
 132         * include/std/string_view (__sv_check, __sv_limit): New
 133         helper functions to replace basic_string_view::_M_check and
 134         basic_string_view::_M_limit.
 135         (basic_string_view): Add static assertions to enforce ill-formed
 136         requirement for traits_type::char_type from P1148R0, and to enforce
 137         required properties of char-like types.
 138         (basic_string_view::pointer, basic_string_view::reference): Fix to
 139         refer to non-const value_type.
 140         (basic_string_view::operator[], basic_string_view::at)
 141         (basic_string_view::front, basic_string_view::back)
 142         (basic_string_view::data): Use const_reference and const_pointer
 143         typedefs for return types.
 144         (basic_string_view::_M_check, basic_string_view::_M_limit): Remove.
 145         (hash<wstring_view>): Fix argument_type typedef.
 146         * testsuite/21_strings/basic_string_view/modifiers/remove_prefix/
 147         char/1.cc: Fix expected return type of basic_string_view::data().
 148         * testsuite/21_strings/basic_string_view/modifiers/remove_prefix/
 149         wchar_t/1.cc: Likewise.
 150         * testsuite/21_strings/basic_string_view/modifiers/remove_suffix/
 151         char/1.cc: Likewise.
 152         * testsuite/21_strings/basic_string_view/modifiers/remove_suffix/
 153         wchar_t/1.cc: Likewise.
 154         * testsuite/21_strings/basic_string_view/requirements/traits_neg.cc:
 155         New test.
 156         * testsuite/21_strings/basic_string_view/requirements/typedefs.cc:
 157         Check reference and pointer typedefs.
 158         * testsuite/experimental/string_view/requirements/typedefs.cc:
 159         Likewise.
 160         * testsuite/experimental/string_view/modifiers/remove_prefix/char/1.cc:
 161         Fix expected return type of basic_string_view::data().
 162         * testsuite/experimental/string_view/modifiers/remove_prefix/wchar_t/
 163         1.cc: Likewise.
 164         * testsuite/experimental/string_view/modifiers/remove_suffix/char/1.cc:
 165         Likewise.
 166         * testsuite/experimental/string_view/modifiers/remove_suffix/wchar_t/
 167         1.cc: Likewise.
 168
 169         PR libstdc++/90220
 170         * include/std/any (__any_caster): Use remove_cv_t instead of decay_t.
 171         Avoid a runtime check for types that can never be stored in std::any.
 172         * testsuite/20_util/any/misc/any_cast.cc: Test std::any_cast with
 173         array types.
 174
 175         PR libstdc++/90220 (partial)
 176         * include/std/any (any_cast<T>(any*), any_cast<T>(const any*)): Do
 177         not attempt ill-formed static_cast to pointers to non-object types.
 178         * testsuite/20_util/any/misc/any_cast.cc: Test std::any_cast with
 179         function types.
 180
 181         * testsuite/20_util/variant/run.cc: Catch exception by reference to
 182         prevent -Wcatch-value warning.
 183
 184         * include/std/variant (__variant_construct): Use template parameter
 185         type instead of equivalent decltype-specifier.
 186         (_Move_ctor_base<false, Types...>::_Move_ctor_base(_Move_ctor_base&&)):
 187         Replace forward with move.
 188         (_Move_ctor_base<false, Types...>::_M_destructive_move)
 189         (_Move_ctor_base<false, Types...>::_M_destructive_copy)
 190         (_Move_ctor_base<true, Types...>::_M_destructive_move)
 191         (_Move_ctor_base<true, Types...>::_M_destructive_copy): Only set the
 192         index after construction succeeds.
 193         (_Copy_assign_base<false, Types...>::operator=): Remove redundant
 194         if-constexpr checks that are always true. Use __remove_cvref_t instead
 195         of remove_reference so that is_nothrow_move_constructible check
 196         doesn't use a const rvalue parameter. In the potentially-throwing case
 197         construct a temporary and move assign it, as per LWG 2904.
 198         (_Move_assign_base<false, Types...>::operator=): Remove redundant
 199         if-constexpr checks that are always true. Use emplace as per LWG 2904.
 200         (variant::operator=(T&&)): Only use emplace conditionally, otherwise
 201         construct a temporary and move assign from it, as per LWG 2904.
 202         * testsuite/20_util/variant/exception_safety.cc: Check that
 203         assignment operators have strong exception safety guarantee.
 204
 205 2019-04-23  Thomas Rodgers <trodgers@redhat.com>
 206
 207         Document PSTL linker flags
 208
 209         * doc/xml/manual/using.xml: Add PSTL linker flags to table 3.1.
 210
 211 2019-04-23  Jonathan Wakely  <jwakely@redhat.com>
 212
 213         * include/std/variant (__detail::__variant::_Traits): Make
 214         _S_trivial_copy_assign depend on _S_trivial_copy_ctor and make
 215         _S_trivial_move_assign depend on _S_trivial_move_ctor, as per
 216         P0602R4.
 217         (__detail::__variant::_Copy_assign_alias): Only depend on
 218         _S_trivial_copy_assign, which subsumes _S_trivial_copy_ctor now.
 219         * testsuite/20_util/variant/compile.cc: Correct checks for trivial
 220         move assignment operators.
 221
 222         PR libstdc++/90165
 223         * include/std/variant (variant::__not_self): New helper for the
 224         is_same_v<remove_cvref_t<T>, variant>==false constraints.
 225         (variant::__to_type_impl): Remove.
 226         (variant::__to_type): Add default argument to check pack size, instead
 227         of using __to_type_impl.
 228         (variant::__accepted_type): Add default argument using __not_self.
 229         (variant::__is_in_place_tag, variant::__not_in_place_tag): New helpers
 230         for variant(T&&) constructor constraint.
 231         (variant::variant(T&&)): Use __not_in_place_tag in constraints.
 232         Extract __accepted_type into a named template parameter for reuse in
 233         other constraints and in the exception specification.
 234         (variant::variant(in_place_type_t<T>, Args&&...))
 235         (variant::variant(in_place_type_t<T>, initializer_list<U>, Args&&...))
 236         (variant::variant(in_place_index_t<T>, Args&&...))
 237         (variant::variant(in_place_index_t<T>, initializer_list<U>, Args&&...))
 238         (variant::operator=T&&)): Remove redundant && from trait arguments.
 239         * testsuite/20_util/variant/compile.cc: Check variant(T&&) constructor
 240         isn't used for in_place_type or in_place_index arguments.
 241
 242         * include/std/type_traits (unwrap_reference_t): Define for C++2a.
 243         (unwrap_ref_decay): Remove inheritance from unwrap_reference.
 244         * testsuite/20_util/unwrap_reference/1.cc: Adjust test to use alias.
 245
 246 2019-04-23  Ramana Radhakrishnan  <ramana.radhakrishnan@arm.com>
 247             Bernd Edlinger  <bernd.edlinger@hotmail.de>
 248             Jakub Jelinek  <jakub@redhat.com>
 249
 250         PR target/89093
 251         * libsupc++/eh_personality.cc (PERSONALITY_FUNCTION): Add
 252         general-regs-only target attribute for ARM.
 253
 254 2019-04-23  Jonathan Wakely  <jwakely@redhat.com>
 255
 256         PR libstdc++/87431
 257         * include/bits/basic_string.h (_Never_valueless_alt): Make partial
 258         specialization also depend on is_nothrow_move_constructible.
 259         * include/std/variant (__detail::__variant::__never_valueless()):
 260         Only true if the variant would have a move assignment operator.
 261         (__detail::__variant::_Variant_storage<false, T...>::_M_valid()):
 262         Check __never_valueless<T...>().
 263         (variant::emplace): Only perform non-throwing move assignments
 264         for never-valueless alternatives if the variant has a move assignment
 265         operator.
 266         * testsuite/20_util/variant/compile.cc: Check that never-valueless
 267         types can be emplaced into non-assignable variants.
 268         * testsuite/20_util/variant/run.cc: Check that never-valueless types
 269         don't get copied when emplaced into non-assignable variants.
 270
 271         * include/std/variant (__detail::__variant::__ref_cast): Remove
 272         unused function.
 273         (__detail::__variant::_Uninitialized::_M_get)
 274         (__detail::__variant::__get)
 275         (__gen_vtable_impl::__element_by_index_or_cookie): Add noexcept.
 276
 277 2019-04-21  Iain Sandoe  <iain@sandoe.co.uk>
 278
 279         * testsuite/17_intro/headers/c++1998/charset.cc: Skip for Darwin8
 280         to Darwin10.
 281         * testsuite/17_intro/headers/c++2011/charset.cc: Likewise.
 282         * testsuite/17_intro/headers/c++2014/charset.cc: Likewise.
 283         * testsuite/17_intro/headers/c++2017/charset.cc: Likewise.
 284         * testsuite/17_intro/headers/c++2020/charset.cc: Likewise.
 285
 286 2019-04-20  Thomas Rodgers <trodgers@redhat.com>
 287
 288         Delegate PSTL configuration to pstl/pstl_config.h
 289
 290         * include/bits/c++config: Remove explicit PSTL configuration
 291         macros and use definitions from <pstl/pstl_config.h>.
 292
 293 2019-04-20  Thomas Rodgers <trodgers@redhat.com>
 294
 295         Cleanup algorithm implementations
 296         * include/pstl/glue_algorithm_impl.h (stable_sort): Forward
 297         execution policy.
 298         (mismatch): Forward execution policy.
 299         (equal): Qualify call to std::equal().
 300         (partial_sort): Forward execution policy.
 301         (inplace_merge): Forward execution policy.
 302
 303 2019-04-19  Thomas Rodgers <trodgers@redhat.com>
 304
 305         Improve implementation of parallel equal()
 306         * include/pstl/algorithm_impl.h
 307         (__internal::__brick_equal): use "4 iterator" version of
 308         std::equal().
 309         (__internal::__brick_equal): use simd for random access
 310         iterators on unsequenced execution policies.
 311         (__internal::__pattern_equal): add "4 iterator" version
 312         (__internal::__pattern_equal): dispatch to simd __brick_equal
 313         for vector-only execution policies.
 314         (__internal::__pattern_equal): dispatch to __parallel_or for
 315         parallel execution policies.
 316         * include/pstl/glue_algorithm_impl.h
 317         (std::equal): dispatch to "4 iterator" version of
 318         __internal::__pattern_equal().
 319
 320 2019-04-17  Jonathan Wakely  <jwakely@redhat.com>
 321
 322         PR libstdc++/90105
 323         * include/bits/forward_list.h (operator==): Do not use operator!= to
 324         compare elements.
 325         (forward_list<T, A>::sort(Comp)): When elements are equal take the one
 326         earlier in the list, so that sort is stable.
 327         * testsuite/23_containers/forward_list/operations/90105.cc: New test.
 328         * testsuite/23_containers/forward_list/comparable.cc: Test with
 329         types that meet the minimum EqualityComparable and LessThanComparable
 330         requirements. Remove irrelevant comment.
 331
 332         * include/std/variant (__detail::__variant::_Traits::_S_copy_assign):
 333         Do not depend on whether all alternative types are move constructible.
 334         (__detail::__variant::_Copy_assign_base::operator=): Remove cv-quals
 335         from the operand when deciding whether to perform the assignment.
 336         * testsuite/20_util/variant/compile.cc (DeletedMoves): Define type
 337         with deleted move constructor and deleted move assignment operator.
 338         (default_ctor, copy_ctor, move_ctor, copy_assign, move_assign): Check
 339         behaviour of variants with DeletedMoves as an alternative.
 340         * testsuite/20_util/variant/run.cc (DeletedMoves): Define same type.
 341         (move_ctor, move_assign): Check that moving a variant with a
 342         DeletedMoves alternative falls back to copying instead of moving.
 343
 344         * testsuite/20_util/variant/compile.cc: Remove empty string literals
 345         from static_assert declarations.
 346
 347         * testsuite/20_util/variant/compile.cc (MoveCtorOnly): Fix type to
 348         actually match its name.
 349         (MoveCtorAndSwapOnly): Define new type that adds swap to MoveCtorOnly.
 350         (test_swap()): Fix result for MoveCtorOnly and check
 351         MoveCtorAndSwapOnly.
 352
 353         * include/std/optional (optional::value_or(U&&) &&): Add missing
 354         constexpr specifier.
 355         * testsuite/20_util/optional/constexpr/observers/4.cc: Check value_or
 356         for disengaged optionals and rvalue optionals.
 357         * testsuite/20_util/optional/observers/4.cc: Likewise.
 358
 359 2019-04-12  Thomas Rodgers  <trodgers@redhat.com>
 360
 361         * include/pstl/algorithm_impl.h: Uglify identfiers.
 362         * include/pstl/numeric_impl.h:  Uglify identfiers.
 363         * include/pstl/parallel_backend_tbb.h: Uglify identfiers.
 364
 365 2019-04-11  Thomas Rodgers  <trodgers@redhat.com>
 366
 367         * include/bits/c++config:
 368         Add definition for __PSTL_ASSERT.
 369         Add definition for __PSTL_ASSERT_MSG.
 370         * include/pstl/algorithm_impl.h: Replace use of assert().
 371         * include/pstl/numeric_impl.h: Replace use of assert().
 372         * include/pstl/parallel_backend_tbb.h:
 373         Replace use of assert().
 374         Replace use of __TBB_ASSERT().
 375         * include/pstl/parallel_backend_utils.h: Replace use of assert().
 376
 377 2019-04-11  Jonathan Wakely  <jwakely@redhat.com>
 378
 379         PR libstdc++/90046
 380         * src/c++17/memory_resource.cc
 381         (monotonic_buffer_resource::_Chunk::allocate): Increase alignment if
 382         needed to allow placing a _Chunk at the end of the buffer.
 383         (monotonic_buffer_resource::_M_new_buffer): Remove static_assert.
 384
 385 2019-04-10  Jonathan Wakely  <jwakely@redhat.com>
 386
 387         * doc/xml/faq.xml: Add information about emergency EH pool.
 388         * doc/xml/manual/debug.xml: Update list of memory debugging tools.
 389         Move outdated information on mt_allocator to a separate section.
 390         * doc/xml/manual/evolution.xml: Clarify that GLIBCXX_FORCE_NEW
 391         doesn't affect the default allocator.
 392
 393         * testsuite/lib/libstdc++.exp (check_v3_target_parallel_mode): Fix
 394         typo.
 395
 396         PR libstdc++/89851
 397         * testsuite/20_util/variant/89851.cc: New test.
 398
 399 2019-04-09  Jonathan Wakely  <jwakely@redhat.com>
 400
 401         * include/std/variant: Adjust whitespace. Add comments.
 402         (_Multi_array): Leave primary template undefined.
 403         (_Multi_array<_Tp>): Define partial specialization for base case of
 404         recursion.
 405         (__gen_vtable_impl, __gen_vtable): Remove redundant && from type
 406         which is always a reference.
 407         (__gen_vtable::_S_apply()): Remove function, inline body into
 408         default member initializer.
 409         * testsuite/20_util/variant/visit.cc: Test with noncopyable types.
 410
 411         * include/std/variant (__variant_idx_cookie): Add member type.
 412         (__visitor_result_type): Remove.
 413         (__do_visit): Use invoke_result instead of __visitor_result_type.
 414         * testsuite/20_util/variant/visit.cc: New test.
 415
 416         PR libstdc++/90008
 417         * include/std/variant (_VARIANT_RELATION_FUNCTION_TEMPLATE): Remove
 418         unused capture.
 419         * testsuite/20_util/variant/90008.cc: New test.
 420
 421 2019-04-09  Thomas Rodgers  <trodgers@redhat.com>
 422
 423         * include/pstl/algorithm_impl.h: Add namespace qualification.
 424         * include/pstl/execution_defs.h: Add namespace qualification.
 425         * include/pstl/execution_impl.h: Add namespace qualification.
 426         * include/pstl/numeric_impl.h: Add namespace qualification.
 427         * include/pstl/parallel_backend_tbb.h: Add namespace qualification.
 428         * include/pstl/unseq_backend_simd.h: Add namespace qualification.
 429         * include/pstl/parallel_backend_utils.h: Include <cassert>.
 430
 431 2019-04-08  Ville Voutilainen  <ville.voutilainen@gmail.com>
 432
 433         Fix visit<R> for variant.
 434         * include/std/variant (__do_visit): Add a template parameter
 435         for enforcing same return types for visit.
 436         (__gen_vtable_impl): Likewise.
 437         (_S_apply_single_alt): Adjust.
 438         (__visit_invoke_impl): New. Handle casting to void.
 439         (__do_visit_invoke): New. Enforces same return types.
 440         (__do_visit_invoke_r): New. Converts return types.
 441         (__visit_invoke): Adjust.
 442         (__gen_vtable):  Add a template parameter for enforcing
 443         same return types for visit.
 444         * testsuite/20_util/variant/visit_r.cc: Add a test for a visitor with
 445         different return types.
 446         * testsuite/20_util/variant/visit_neg.cc: New. Ensures that
 447         visitors with different return types don't accidentally
 448         compile with regular visitation.
 449
 450 2019-04-08  Christophe Lyon  <christophe.lyon@linaro.org>
 451
 452         * testsuite/27_io/filesystem/iterators/caching.cc: Add
 453         dg-require-filesystem-ts.
 454
 455 2019-04-05  Jonathan Wakely  <jwakely@redhat.com>
 456
 457         * doc/xml/manual/status_cxx2020.xml: Update status.
 458         * include/std/variant (visit<R>): Define for C++2a (P0655R1).
 459         * testsuite/20_util/variant/visit_r.cc: New test.
 460
 461         * include/bits/fs_dir.h (directory_iterator::operator*)
 462         (directory_iterator::operator->): Add noexcept.
 463         (operator==, operator!=): Replace namespace-scope equality operators
 464         for directory iterators with hidden friends.
 465
 466         PR libstdc++/89986
 467         * config/abi/pre/gnu.ver: Add missing exports.
 468         * testsuite/27_io/filesystem/iterators/directory_iterator.cc: Test
 469         increment member.
 470
 471         * config/abi/pre/gnu.ver: Export new symbols.
 472         * include/bits/fs_dir.h (recursive_directory_iterator::options())
 473         (recursive_directory_iterator::recursion_pending())
 474         (recursive_directory_iterator::disable_recursion_pending()): Remove
 475         inline definitions. Make noexcept.
 476         (recursive_directory_iterator::depth())
 477         (recursive_directory_iterator::operator*())
 478         (recursive_directory_iterator::operator->()): Make noexcept.
 479         (recursive_directory_iterator::_M_options)
 480         (recursive_directory_iterator::_M_pending): Remove data members.
 481         * src/c++17/fs_path.cc (_Dir_stack): Add constructor and data members.
 482         (recursive_directory_iterator::recursive_directory_iterator): Remove
 483         ctor-initializer. Use new constructor for _Dir_stack.
 484         (recursive_directory_iterator::options())
 485         (recursive_directory_iterator::recursion_pending())
 486         (recursive_directory_iterator::disable_recursion_pending()): Add
 487         non-inline definitions.
 488         (recursive_directory_iterator::depth()): Make noexcept.
 489         (recursive_directory_iterator::increment(error_code&))
 490         (recursive_directory_iterator::pop(error_code&)): Adjust to new
 491         location of options and recursion_pending members.
 492         * testsuite/27_io/filesystem/iterators/recursion_pending.cc: New test.
 493         * testsuite/util/testsuite_fs.h (__gnu_test::scoped_file): Add
 494         user-declared move constructor and assignment operator, to make the
 495         type move-only.
 496
 497         * src/c++17/fs_dir.cc (_Dir::advance(bool, error_code&)): Handle
 498         d_type == DT_UNKNOWN immediately.
 499         (_Dir::should_recurse(bool, error_code&)): Remove file_type::unknown
 500         handling here.
 501         * testsuite/27_io/filesystem/iterators/caching.cc: New test.
 502
 503         * include/bits/fs_path.h (path::operator=(path&&)): Check for self
 504         assignment.
 505         * src/c++17/fs_path.cc (path::operator=(const path&)): Likewise.
 506         * testsuite/27_io/filesystem/path/assign/copy.cc: Test self
 507         assignment.
 508
 509         PR libstdc++/87431 (again)
 510         * include/bits/basic_string.h (__variant::_Never_valueless_alt):
 511         Define partial specialization for basic_string.
 512         * include/bits/shared_ptr.h (_Never_valueless_alt): Likewise for
 513         shared_ptr and weak_ptr.
 514         * include/bits/std_function.h (_Never_valueless_alt): Likewise for
 515         function.
 516         * include/bits/stl_vector.h (_Never_valueless_alt): Likewise for
 517         vector.
 518         * include/bits/unique_ptr.h (_Never_valueless_alt): Likewise for
 519         unique_ptr.
 520         * include/debug/vector (_Never_valueless_alt): Likewise for debug
 521         vector.
 522         * include/std/any (_Never_valueless_alt): Define explicit
 523         specialization for any.
 524         * include/std/variant (_Never_valueless_alt): Define primary template.
 525         (__never_valueless): Use _Never_valueless_alt instead of
 526         is_trivially_copyable.
 527         (variant::emplace<N>(Args&&...)): Add special case for non-throwing
 528         initializations to avoid try-catch overhead. Add special case for
 529         scalars produced by potentially-throwing conversions. Use
 530         _Never_valueless_alt instead of is_trivially_copyable for the
 531         remaining strong exception-safety cases.
 532         (variant::emplace<N>(initializer_list<U>, Args&&...)): Likewise.
 533         * testsuite/20_util/variant/87431.cc: Run both test functions.
 534         * testsuite/20_util/variant/exception_safety.cc: New test.
 535         * testsuite/20_util/variant/run.cc: Use pmr::string instead of string,
 536         so the variant becomes valueless.
 537
 538 2019-04-03  Jonathan Wakely  <jwakely@redhat.com>
 539
 540         PR libstdc++/85184
 541         * include/std/variant (_Copy_assign_base, _Move_assign_base, variant):
 542         Remove assertions.
 543         (variant::emplace<_Tp>): Return result of emplace<N> directly.
 544
 545         * include/std/string (__hash_string_base): New class template defining
 546         operator() for hashing strings.
 547         (hash<pmr::string>, hash<pmr::u8string>, hash<pmr::u16string>)
 548         (hash<pmr::u32string>, hash<pmr::wstring>): Define for C++17.
 549         * testsuite/21_strings/basic_string/hash/hash.cc: New test.
 550         * testsuite/21_strings/basic_string/hash/hash_char8_t.cc: New test.
 551
 552 2019-04-01  Ville Voutilainen  <ville.voutilainen@gmail.com>
 553
 554         Use single-visitation in variant assignment and swap and relops.
 555         Also use indices instead of types when checking whether
 556         variants hold the same thing.
 557         * include/std/variant (__do_visit): Add a template parameter
 558         for index visitation, invoke with indices if index visitation
 559         is used.
 560         (__variant_idx_cookie): New.
 561         (__visit_with_index): Likewise.
 562         (_Copy_assign_base::operator=): Do single-visitation with
 563         an index visitor.
 564         (_Move_assign_base::operator=): Likewise.
 565         (_Extra_visit_slot_needed): Adjust.
 566         (__visit_invoke): Call with indices if it's an index visitor.
 567         (relops): Do single-visitation with an index visitor.
 568         (swap): Likewise.
 569         (__visitor_result_type): New.
 570
 571 2019-03-30  Eric Botcazou  <ebotcazou@adacore.com>
 572
 573         * src/c++17/fs_ops.cc (fs::permissions): Use std::errc::not_supported.
 574
 575 2019-03-28  Ville Voutilainen  <ville.voutilainen@gmail.com>
 576
 577         Don't revisit a variant we are already visiting.
 578         * include/std/variant (__variant_construct_single): New.
 579         (__variant_construct): Use it.
 580         (_M_destructive_move): Likewise.
 581         (_M_destructive_copy): Likewise.
 582         (_Copy_assign_base::operator=): Adjust.
 583         (_Move_assign_base::operator=): Likewise.
 584         (swap): Likewise.
 585
 586 2019-03-26  Jonathan Wakely  <jwakely@redhat.com>
 587
 588         PR libstdc++/85965
 589         * include/bits/hashtable.h (_Hashtable): Move static assertions to
 590         destructor so they are not evaluated until the _Key type is complete.
 591         * include/bits/stl_tree.h (_Rb_tree): Likewise.
 592         * testsuite/23_containers/set/85965.cc: New test.
 593         * testsuite/23_containers/unordered_set/85965.cc: New test.
 594         * testsuite/23_containers/map/48101_neg.cc: Replace "here" errors
 595         with regexp matching the corresponding _Rb_tree specialization.
 596         * testsuite/23_containers/multimap/48101_neg.cc: Likewise.
 597         * testsuite/23_containers/multiset/48101_neg.cc: Remove "here" error.
 598         * testsuite/23_containers/set/48101_neg.cc: Likewise.
 599         * testsuite/23_containers/unordered_map/48101_neg.cc: Likewise.
 600         * testsuite/23_containers/unordered_multimap/48101_neg.cc: Likewise.
 601         * testsuite/23_containers/unordered_multiset/48101_neg.cc: Likewise.
 602         * testsuite/23_containers/unordered_set/48101_neg.cc: Likewise.
 603
 604 2019-03-26  Ville Voutilainen  <ville.voutilainen@gmail.com>
 605
 606         PR libstdc++/89825
 607         Fix based on a suggestion by Antony Polukhin.
 608         * include/std/variant (__never_valueless): New.
 609         (_M_valid): Use it.
 610         (_Extra_visit_slot_needed): New.
 611         (_Multi_array): Use it.
 612         (_S_apply_all_alts): Likewise.
 613
 614 2019-03-26  Ville Voutilainen  <ville.voutilainen@gmail.com>
 615
 616         PR libstdc++/89824
 617         Fix based on a suggestion by Antony Polukhin.
 618         * include/std/variant (__gen_vtable): Don't reserve an
 619         additional table slot, _Multi_array already does that.
 620
 621 2019-03-26  Ville Voutilainen  <ville.voutilainen@gmail.com>
 622
 623         PR libstdc++/89816
 624         Fix based on a suggestion by Antony Polukhin.
 625         * include/std/variant (__variant_construct): Capture a pointer
 626         to the storage and visit just one variant.
 627
 628 2019-03-22  Jonathan Wakely  <jwakely@redhat.com>
 629
 630         * doc/xml/manual/backwards_compatibility.xml: Remove link to
 631         Doxygen-generated pages with unstable URL.
 632         * doc/xml/manual/concurrency_extensions.xml: Likewise.
 633         * doc/xml/manual/extensions.xml: Likewise.
 634         * doc/xml/manual/parallel_mode.xml: Likewise.
 635         * doc/xml/manual/support.xml: Likewise.
 636
 637         * include/bits/stl_algobase.h (__lg): Do arithmetic on type int to
 638         avoid -Wconversion warnings.
 639
 640 2019-03-21  Thomas Rodgers  <trodgers@redhat.com>
 641
 642         * include/Makefile.am (std_header): Add ${std_srcdir}/execution.
 643         (pstl_srcdir, pstl_builddir, pstl_headers): New variables.
 644         (allstamped): Add stamp-pstl.
 645         (install-headers): Add ptsl_builddir.
 646         * include/Makefile.in: Regenerate.
 647         * include/bits/c++config: Add pstl configuration.
 648         * include/pstl/LICENSE.txt: New file.
 649         * include/pstl/algorithm_fwd.h: New file.
 650         * include/pstl/algorithm_impl.h: New file.
 651         * include/pstl/execution_defs.h: New file.
 652         * include/pstl/execution_impl.h: New file.
 653         * include/pstl/glue_algorithm_defs.h: New file.
 654         * include/pstl/glue_algorithm_impl.h: New file.
 655         * include/pstl/glue_execution_defs.h: New file.
 656         * include/pstl/glue_memory_defs.h: New file.
 657         * include/pstl/glue_memory_impl.h: New file.
 658         * include/pstl/glue_numeric_defs.h: New file.
 659         * include/pstl/glue_numeric_impl.h: New file.
 660         * include/pstl/memory_impl.h: New file.
 661         * include/pstl/numeric_fwd.h: New file.
 662         * include/pstl/numeric_impl.h: New file.
 663         * include/pstl/parallel_backend.h: New file.
 664         * include/pstl/parallel_backend_tbb.h: New file.
 665         * include/pstl/parallel_backend_utils.h: New file.
 666         * include/pstl/parallel_impl.h: New file.
 667         * include/pstl/pstl_config.h: New file.
 668         * include/pstl/unseq_backend_simd.h: New file.
 669         * include/pstl/utils.h: New file.
 670         * include/std/algorithm: Include parallel algorithm implementations.
 671         * include/std/execution: New file.
 672         * include/std/memory: Include parallel algorithm implementations.
 673         * include/std/numeric: Include parallel algorithm implementations.
 674         * include/std/version: Add parallel algorithms feature test macro.
 675         * testsuite/util/pstl/pstl_test_config.h: New file.
 676         * testsuite/util/pstl/test_utils.h: New file.
 677         * testsuite/20_util/specialized_algorithms/pstl/uninitialized_construct.cc: New file.
 678         * testsuite/20_util/specialized_algorithms/pstl/uninitialized_copy_move.cc: New file.
 679         * testsuite/20_util/specialized_algorithms/pstl/uninitialized_fill_destroy.cc: New file.
 680         * testsuite/25_algorithms/pstl/alg_merge/inplace_merge.cc: New file.
 681         * testsuite/25_algorithms/pstl/alg_merge/merge.cc: New file.
 682         * testsuite/25_algorithms/pstl/alg_modifying_operations/copy_if.cc: New file.
 683         * testsuite/25_algorithms/pstl/alg_modifying_operations/copy_move.cc: New file.
 684         * testsuite/25_algorithms/pstl/alg_modifying_operations/fill.cc: New file.
 685         * testsuite/25_algorithms/pstl/alg_modifying_operations/generate.cc: New file.
 686         * testsuite/25_algorithms/pstl/alg_modifying_operations/is_partitioned.cc: New file.
 687         * testsuite/25_algorithms/pstl/alg_modifying_operations/partition.cc: New file.
 688         * testsuite/25_algorithms/pstl/alg_modifying_operations/partition_copy.cc: New file.
 689         * testsuite/25_algorithms/pstl/alg_modifying_operations/remove.cc: New file.
 690         * testsuite/25_algorithms/pstl/alg_modifying_operations/remove_copy.cc: New file.
 691         * testsuite/25_algorithms/pstl/alg_modifying_operations/replace.cc: New file.
 692         * testsuite/25_algorithms/pstl/alg_modifying_operations/replace_copy.cc: New file.
 693         * testsuite/25_algorithms/pstl/alg_modifying_operations/rotate.cc: New file.
 694         * testsuite/25_algorithms/pstl/alg_modifying_operations/rotate_copy.cc: New file.
 695         * testsuite/25_algorithms/pstl/alg_modifying_operations/swap_ranges.cc: New file.
 696         * testsuite/25_algorithms/pstl/alg_modifying_operations/transform_binary.cc: New file.
 697         * testsuite/25_algorithms/pstl/alg_modifying_operations/transform_unary.cc: New file.
 698         * testsuite/25_algorithms/pstl/alg_modifying_operations/unique.cc: New file.
 699         * testsuite/25_algorithms/pstl/alg_modifying_operations/unique_copy_equal.cc: New file.
 700         * testsuite/25_algorithms/pstl/alg_nonmodifying/adjacent_find.cc: New file.
 701         * testsuite/25_algorithms/pstl/alg_nonmodifying/all_of.cc: New file.
 702         * testsuite/25_algorithms/pstl/alg_nonmodifying/any_of.cc: New file.
 703         * testsuite/25_algorithms/pstl/alg_nonmodifying/count.cc: New file.
 704         * testsuite/25_algorithms/pstl/alg_nonmodifying/equal.cc: New file.
 705         * testsuite/25_algorithms/pstl/alg_nonmodifying/find.cc: New file.
 706         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_end.cc: New file.
 707         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_first_of.cc: New file.
 708         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_if.cc: New file.
 709         * testsuite/25_algorithms/pstl/alg_nonmodifying/for_each.cc: New file.
 710         * testsuite/25_algorithms/pstl/alg_nonmodifying/mismatch.cc: New file.
 711         * testsuite/25_algorithms/pstl/alg_nonmodifying/none_of.cc: New file.
 712         * testsuite/25_algorithms/pstl/alg_nonmodifying/nth_element.cc: New file.
 713         * testsuite/25_algorithms/pstl/alg_nonmodifying/reverse.cc: New file.
 714         * testsuite/25_algorithms/pstl/alg_nonmodifying/reverse_copy.cc: New file.
 715         * testsuite/25_algorithms/pstl/alg_nonmodifying/search_n.cc: New file.
 716         * testsuite/25_algorithms/pstl/alg_sorting/includes.cc: New file.
 717         * testsuite/25_algorithms/pstl/alg_sorting/is_heap.cc: New file.
 718         * testsuite/25_algorithms/pstl/alg_sorting/is_sorted.cc: New file.
 719         * testsuite/25_algorithms/pstl/alg_sorting/lexicographical_compare.cc: New file.
 720         * testsuite/25_algorithms/pstl/alg_sorting/minmax_element.cc: New file.
 721         * testsuite/25_algorithms/pstl/alg_sorting/partial_sort.cc: New file.
 722         * testsuite/25_algorithms/pstl/alg_sorting/partial_sort_copy.cc: New file.
 723         * testsuite/25_algorithms/pstl/alg_sorting/set.cc: New file.
 724         * testsuite/25_algorithms/pstl/alg_sorting/sort.cc: New file.
 725         * testsuite/26_numerics/pstl/numeric_ops/adjacent_difference.cc: New file.
 726         * testsuite/26_numerics/pstl/numeric_ops/reduce.cc: New file.
 727         * testsuite/26_numerics/pstl/numeric_ops/scan.cc: New file.
 728         * testsuite/26_numerics/pstl/numeric_ops/transform_reduce.cc: New file.
 729         * testsuite/26_numerics/pstl/numeric_ops/transform_scan.cc: New file.
 730         * testsuite/testsuite/20_util/specialized_algorithms/pstl/uninitialized_construct.cc: New file.
 731         * testsuite/testsuite/20_util/specialized_algorithms/pstl/uninitialized_copy_move.cc: New file.
 732         * testsuite/testsuite/20_util/specialized_algorithms/pstl/uninitialized_fill_destroy.cc: New file.
 733         * testsuite/testsuite/25_algorithms/pstl/alg_merge/inplace_merge.cc: New file.
 734         * testsuite/testsuite/25_algorithms/pstl/alg_merge/merge.cc: New file.
 735         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/copy_if.cc: New file.
 736         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/copy_move.cc: New file.
 737         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/fill.cc: New file.
 738         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/generate.cc: New file.
 739         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/is_partitioned.cc: New file.
 740         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/partition.cc: New file.
 741         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/partition_copy.cc: New file.
 742         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/remove.cc: New file.
 743         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/remove_copy.cc: New file.
 744         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/replace.cc: New file.
 745         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/replace_copy.cc: New file.
 746         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/rotate.cc: New file.
 747         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/rotate_copy.cc: New file.
 748         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/swap_ranges.cc: New file.
 749         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/transform_binary.cc: New file.
 750         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/transform_unary.cc: New file.
 751         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/unique.cc: New file.
 752         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/unique_copy_equal.cc: New file.
 753         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/adjacent_find.cc: New file.
 754         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/all_of.cc: New file.
 755         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/any_of.cc: New file.
 756         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/count.cc: New file.
 757         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/equal.cc: New file.
 758         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/find.cc: New file.
 759         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/find_end.cc: New file.
 760         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/find_first_of.cc: New file.
 761         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/find_if.cc: New file.
 762         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/for_each.cc: New file.
 763         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/mismatch.cc: New file.
 764         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/none_of.cc: New file.
 765         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/nth_element.cc: New file.
 766         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/reverse.cc: New file.
 767         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/reverse_copy.cc: New file.
 768         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/search_n.cc: New file.
 769         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/includes.cc: New file.
 770         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/is_heap.cc: New file.
 771         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/is_sorted.cc: New file.
 772         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/lexicographical_compare.cc: New file.
 773         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/minmax_element.cc: New file.
 774         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/partial_sort.cc: New file.
 775         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/partial_sort_copy.cc: New file.
 776         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/set.cc: New file.
 777         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/sort.cc: New file.
 778         * testsuite/testsuite/26_numerics/pstl/numeric_ops/adjacent_difference.cc: New file.
 779         * testsuite/testsuite/26_numerics/pstl/numeric_ops/reduce.cc: New file.
 780         * testsuite/testsuite/26_numerics/pstl/numeric_ops/scan.cc: New file.
 781         * testsuite/testsuite/26_numerics/pstl/numeric_ops/transform_reduce.cc: New file.
 782         * testsuite/testsuite/26_numerics/pstl/numeric_ops/transform_scan.cc: New file.
 783
 784 2019-03-21  Jonathan Wakely  <jwakely@redhat.com>
 785
 786         * include/c_compatibility/math.h [!__STDCPP_WANT_MATH_SPEC_FUNCS__]
 787         (assoc_laguerre, assoc_laguerref, assoc_laguerrel, assoc_legendre)
 788         (assoc_legendref, assoc_legendrel, beta, betaf, betal, comp_ellint_1)
 789         (comp_ellint_1f, comp_ellint_1l, comp_ellint_2, comp_ellint_2f)
 790         (comp_ellint_2l, comp_ellint_3, comp_ellint_3f, comp_ellint_3l)
 791         (cyl_bessel_i, cyl_bessel_if, cyl_bessel_il, cyl_bessel_j)
 792         (cyl_bessel_jf, cyl_bessel_jl, cyl_bessel_k, cyl_bessel_kf)
 793         (cyl_bessel_kl, cyl_neumann, cyl_neumannf, cyl_neumannl, ellint_1)
 794         (ellint_1f, ellint_1l, ellint_2, ellint_2f, ellint_2l, ellint_3)
 795         (ellint_3f, ellint_3l, expint, expintf, expintl, hermite, hermitef)
 796         (hermitel, laguerre, laguerref, laguerrel, legendre, legendref)
 797         (legendrel, riemann_zeta, riemann_zetaf, riemann_zetal, sph_bessel)
 798         (sph_besself, sph_bessell, sph_legendre, sph_legendref, sph_legendrel)
 799         (sph_neumann, sph_neumannf, sph_neumannl): Only add using-declarations
 800         when the special functions IS is enabled, not for C++17.
 801         * testsuite/26_numerics/headers/cmath/functions_global_c++17.cc:
 802         Replace with ...
 803         * testsuite/26_numerics/headers/cmath/functions_global.cc: New test,
 804         without checks for special functions in C++17.
 805         * testsuite/26_numerics/headers/cmath/special_functions_global.cc:
 806         New test.
 807
 808         PR libstdc++/88066
 809         * include/backward/hash_map: Use <> for includes not "".
 810         * include/backward/hash_set: Likewise.
 811         * include/backward/strstream: Likewise.
 812         * include/tr1/bessel_function.tcc: Likewise.
 813         * include/tr1/exp_integral.tcc: Likewise.
 814         * include/tr1/legendre_function.tcc: Likewise.
 815         * include/tr1/modified_bessel_func.tcc: Likewise.
 816         * include/tr1/riemann_zeta.tcc: Likewise.
 817
 818 2019-03-19  Jonathan Wakely  <jwakely@redhat.com>
 819
 820         * doc/xml/manual/allocator.xml: Link to table documenting evolution
 821         of extension allocators.
 822         * doc/xml/manual/evolution.xml: Use angle brackets for header names.
 823         Document new headers in 7.2, 8.1 and 9.1 releases.
 824         * doc/xml/manual/using.xml: Adjust link target for new_allocator.
 825         * doc/html/*: Regenerate.
 826
 827 2019-03-12  John David Anglin  <dave.anglin@bell.net>
 828
 829         PR libstdc++/89461
 830         * testsuite/lib/libstdc++.exp: Locate libatomic.
 831         * testsuite/lib/dg-options.exp (add_options_for_libatomic): New.
 832         * testsuite/20_util/shared_ptr/thread/default_weaktoshared.cc: Add
 833         libatomic options.
 834         * testsuite/20_util/shared_ptr/thread/mutex_weaktoshared.cc: Likewise.
 835         * testsuite/experimental/net/timer/waitable/cons.cc: Likewise.
 836         * testsuite/experimental/net/timer/waitable/dest.cc: Likewise.
 837         * testsuite/experimental/net/timer/waitable/ops.cc: Likewise.
 838
 839 2019-03-11  Jonathan Wakely  <jwakely@redhat.com>
 840
 841         PR libstdc++/89460
 842         * configure.ac: Check for sockatmark.
 843         * crossconfig.m4: Check for sockatmark.
 844         * config.h.in: Regenerate.
 845         * configure: Regenerate.
 846         * include/experimental/internet (address_v4::_S_hton): Rename
 847         overloaded functions to _S_hton_16 and _S_ntoh_16.
 848         (address_v4::_S_ntoh): Rename to _S_ntoh_16 and _S_ntoh_32.
 849         (basic_endpoint): Adjust calls to _S_hton and _S_ntoh.
 850         * include/experimental/socket (basic_socket::at_mark): Check
 851         _GLIBCXX_HAVE_SOCKATMARK.
 852
 853         * testsuite/29_atomics/atomic_flag/test_and_set/explicit-hle.cc: Use
 854         const variables instead of macros.
 855
 856         PR libstdc++/89629
 857         * libsupc++/hash_bytes.cc [__SIZEOF_SIZE_T__ == 8] (_Hash_bytes):
 858         Use correct type for len_aligned.
 859         * testsuite/20_util/hash/89629.cc: New test.
 860
 861 2019-03-11  Jakub Jelinek  <jakub@redhat.com>
 862
 863         PR libstdc++/89641
 864         * include/std/atomic (atomic<T>::store, atomic<T>::load,
 865         atomic<T>::exchange, atomic<T>::compare_exchange_weak,
 866         atomic<T>::compare_exchange_strong): Cast __m or __s and __f to int.
 867         * include/bits/atomic_base.h (__atomic_base<T>::operator++,
 868         __atomic_base<T>::operator--, __atomic_base<T>::operator+=,
 869         __atomic_base<T>::operator-=, __atomic_base<T>::operator&=,
 870         __atomic_base<T>::operator|=, __atomic_base<T>::operator^=,
 871         __atomic_base<T*>::operator++, __atomic_base<T*>::operator--,
 872         __atomic_base<T*>::operator+=, __atomic_base<T*>::operator-=): Cast
 873         memory_order_seq_cst to int.
 874
 875 2019-03-08  Jonathan Wakely  <jwakely@redhat.com>
 876
 877         * doc/xml/manual/using.xml: Use link element instead of xref.
 878         * doc/html/*: Regenerate.
 879
 880         * include/bits/fs_path.h (path::format): Add fixed underlying type.
 881
 882 2019-03-08  François Dumont  <fdumont@gcc.gnu.org>
 883
 884         PR libstdc++/89477
 885         * include/debug/map.h (map): Use _RequireNotAllocator to constrain
 886         parameters in deduction guides.
 887         * include/debug/multimap.h (multimap): Likewise.
 888         * include/debug/set.h (multimap): Likewise.
 889         * include/debug/multiset.h (multimap): Likewise.
 890         * include/debug/unordered_map (unordered_map): Likewise.
 891         (unordered_multimap): Likewise.
 892         * include/debug/unordered_set (unordered_set): Likewise.
 893         (unordered_multiset): Likewise.
 894
 895         PR libstdc++/89608
 896         * include/debug/unordered_map (unordered_map<>::_M_check_rehashed):
 897         Invalidate all iterators in case of rehash.
 898         (unordered_multimap<>::_M_check_rehashed): Likewise.
 899         * include/debug/unordered_set
 900         (unordered_set<>::_M_check_rehashed): Likewise.
 901         (unordered_multiset<>::_M_check_rehashed): Likewise.
 902         * testsuite/23_containers/unordered_set/debug/89608_neg.cc: New.
 903
 904 2019-03-07  Andreas Schwab  <schwab@suse.de>
 905
 906         * config/abi/post/riscv64-linux-gnu: New directory.
 907         * config/abi/post/riscv64-linux-gnu/baseline_symbols.txt: New file.
 908
 909 2019-03-07  Jonathan Wakely  <jwakely@redhat.com>
 910
 911         * testsuite/20_util/function_objects/bind_front/1.cc: Change from
 912         compile test to run. Fix typo.
 913
 914         * doc/xml/manual/status_cxx2020.xml: Update C++20 status.
 915         * doc/html/*: Regenerate.
 916
 917         P0356R5 Simplified partial function application
 918         * include/std/functional [C++20] (_Bind_front, _Bind_front_t): Define
 919         helpers for bind_front.
 920         (bind_front, __cpp_lib_bind_front): Define.
 921         * testsuite/20_util/function_objects/bind_front/1.cc: New test.
 922
 923 2019-03-06  Jonathan Wakely  <jwakely@redhat.com>
 924
 925         * include/std/type_traits (__cpp_lib_bounded_array_traits): Define.
 926         * include/std/version (__cpp_lib_bounded_array_traits): Likewise.
 927         * testsuite/20_util/is_bounded_array/value.cc: Check for macro.
 928         * testsuite/20_util/is_unbounded_array/value.cc: Likewise.
 929
 930 2019-03-06  Edward Smith-Rowland  <3dw4rd@verizon.net>
 931
 932         PR libstdc++/86655 - std::assoc_legendre should not constrain
 933         the value of m (or x).
 934         * include/tr1/legendre_function.tcc (__assoc_legendre_p,
 935         __sph_legendre): If degree > order Don't throw, return 0.
 936         (__legendre_p, __assoc_legendre_p): Don't constrain x either.
 937         * testsuite/special_functions/02_assoc_legendre/pr86655.cc: New test.
 938         * testsuite/special_functions/20_sph_legendre/pr86655.cc: New test.
 939         * testsuite/tr1/5_numerical_facilities/special_functions/
 940         02_assoc_legendre/pr86655.cc: New test.
 941         * testsuite/tr1/5_numerical_facilities/special_functions/
 942         22_sph_legendre/pr86655.cc: New test.
 943
 944 2019-03-06  Ville Voutilainen  <ville.voutilainen@gmail.com>
 945
 946         Rewrite variant.
 947         Also PR libstdc++/85517
 948         * include/std/variant (__do_visit): New.
 949         (__variant_cast): Likewise.
 950         (__variant_cookie): Likewise.
 951         (__erased_*): Remove.
 952         (_Variant_storage::_S_vtable): Likewise.
 953         (_Variant_storage::__M_reset_impl): Adjust to use __do_visit.
 954         (_Variant_storage::__M_reset): Adjust.
 955         (__variant_construct): New.
 956         (_Copy_ctor_base(const _Copy_ctor_base&)): Adjust to use
 957         __variant_construct.
 958         (_Move_ctor_base(_Move_ctor_base&&)): Likewise.
 959         (_Move_ctor_base::__M_destructive_copy): New.
 960         (_Move_ctor_base::__M_destructive_move): Adjust to use
 961         __variant_construct.
 962         (_Copy_assign_base::operator=): Adjust to use __do_visit.
 963         (_Copy_assign_alias): Adjust to check both copy assignment
 964         and copy construction for triviality.
 965         (_Move_assign_base::operator=): Adjust to use __do_visit.
 966         (_Multi_array): Add support for visitors that accept and return
 967         a __variant_cookie.
 968         (__gen_vtable_impl::_S_apply_all_alts): Likewise.
 969         (__gen_vtable_impl::_S_apply_single_alt): Likewise.
 970         (__gen_vtable_impl::__element_by_index_or_cookie): New. Generate
 971         a __variant_cookie temporary for a variant that is valueless and..
 972         (__gen_vtable_impl::__visit_invoke): ..adjust here.
 973         (__gen_vtable::_Array_type): Conditionally make space for
 974         the __variant_cookie visitor case.
 975         (__variant_construct_by_index): New.
 976         (get_if): Adjust to use std::addressof.
 977         (relops): Adjust to use __do_visit.
 978         (variant): Add __variant_cast and __variant_construct_by_index
 979         as friends.
 980         (variant::emplace): Use _M_reset() and __variant_construct_by_index
 981         instead of self-destruction.
 982         (variant::swap): Adjust to use __do_visit.
 983         (visit): Reimplement in terms of __do_visit.
 984         (__variant_hash_call_base_impl::operator()): Adjust to use __do_visit.
 985         * testsuite/20_util/variant/compile.cc: Adjust.
 986         * testsuite/20_util/variant/run.cc: Likewise.
 987
 988 2019-03-06  Jonathan Wakely  <jwakely@redhat.com>
 989
 990         * include/bits/c++config.h (_cpp_lib_char8_t): Add L suffix to
 991         constant.
 992         * testsuite/experimental/feat-char8_t.cc: Likewise.
 993
 994          * include/std/type_traits [C++20] (is_bounded_array)
 995          (is_unbounded_array, is_bounded_array_v, is_unbounded_array_v):
 996          Define.
 997          * testsuite/20_util/is_bounded_array/requirements/
 998          explicit_instantiation.cc: New test.
 999          * testsuite/20_util/is_bounded_array/requirements/typedefs.cc: New
1000          test.
1001          * testsuite/20_util/is_bounded_array/value.cc: New test.
1002          * testsuite/20_util/is_unbounded_array/requirements/
1003          explicit_instantiation.cc: New test.
1004          * testsuite/20_util/is_unbounded_array/requirements/typedefs.cc: New
1005          * test.
1006          * testsuite/20_util/is_unbounded_array/value.cc: New test.
1007
1008         * include/bits/ptr_traits.h [C++20] (pointer_traits<T*>::pointer_to):
1009         Add constexpr.
1010         * testsuite/20_util/pointer_traits/pointer_to_constexpr.cc: New test.
1011
1012 2019-03-05  Jonathan Wakely  <jwakely@redhat.com>
1013
1014         * include/c_compatibility/math.h [C++20] (lerp): Add using
1015         declaration.
1016         * include/c_global/cmath [C++20] (__cpp_lib_interpolate): Define.
1017         (__lerp): Define function template to implement lerp.
1018         (lerp(float, float, float), lerp(double, double, double))
1019         (lerp(long double, long double, long double)): Define for C++20.
1020         * include/std/numeric [C++20] (__cpp_lib_interpolate): Define.
1021         (midpoint(T, T), midpoint(T*, T*)): Define.
1022         * include/std::version [C++20] (__cpp_lib_interpolate): Define.
1023         * testsuite/26_numerics/lerp.cc: New test.
1024         * testsuite/26_numerics/midpoint/floating.cc: New test.
1025         * testsuite/26_numerics/midpoint/integral.cc: New test.
1026         * testsuite/26_numerics/midpoint/pointer.cc: New test.
1027
1028 2019-03-04  Edward Smith-Rowland  <3dw4rd@verizon.net>
1029
1030         PR libstdc++/88996 Implement P0439R0
1031         Make std::memory_order a scoped enumeration.
1032         * include/bits/atomic_base.h: For C++20 make memory_order a scoped enum,
1033         add variables for the old enumerators.  Adjust calls.
1034         * testsuite/29_atomics/headers/atomic/types_std_c++2a.cc: New test.
1035         * testsuite/29_atomics/headers/atomic/types_std_c++2a_neg.cc: New test.
1036
1037 2019-03-04  Jonathan Wakely  <jwakely@redhat.com>
1038
1039         * testsuite/26_numerics/bit/bitops.rot/rotl.cc: Remove bogus dg-do
1040         directive.
1041
1042         * include/std/memory_resource (polymorphic_allocator): Add default
1043         template argument for C++20.
1044         (polymorphic_allocator::allocate_bytes)
1045         (polymorphic_allocator::deallocate_bytes)
1046         (polymorphic_allocator::allocate_object)
1047         (polymorphic_allocator::deallocate_object)
1048         (polymorphic_allocator::new_object)
1049         (polymorphic_allocator::delete_object): New member functions for
1050         C++20.
1051         * testsuite/20_util/polymorphic_allocator/allocate_object.cc: New
1052         test.
1053
1054 2019-03-03  Jonathan Wakely  <jwakely@redhat.com>
1055
1056         PR libstdc++/89562
1057         * src/filesystem/ops-common.h (do_copy_file): Open files in binary
1058         mode for mingw.
1059
1060 2019-03-01  Jonathan Wakely  <jwakely@redhat.com>
1061
1062         * testsuite/util/testsuite_allocator.h (__gnu_test::memory_resource)
1063         [!__cpp_sized_deallocation]: Do not pass size to operator delete.
1064
1065         * include/std/memory (uses_allocator_construction_args): New set of
1066         overloaded functions.
1067         (make_obj_using_allocator, uninitialized_construct_using_allocator):
1068         New functions.
1069         * include/std/memory_resource (polymorphic_allocator::construct)
1070         [__cplusplus > 201703l]: Replace all overloads with a single function
1071         using uses_allocator_construction_args.
1072         * testsuite/20_util/polymorphic_allocator/construct_c++2a.cc: New
1073         test.
1074         * testsuite/20_util/uses_allocator/make_obj.cc: New test.
1075
1076 2019-02-27  Jonathan Wakely  <jwakely@redhat.com>
1077
1078         PR libstdc++/89466
1079         * acinclude.m4 (GLIBCXX_CONFIGURE_DOCBOOK): Reorder check for local
1080         stylesheet directories before check for xsltproc. Try to use
1081         xmlcatalog to find local stylesheet directory before trying hardcoded
1082         paths. Add path used by suse to hardcoded paths. Adjust xsltproc
1083         check to look for the same stylesheet as doc/Makefile.am uses. Don't
1084         use xsltproc if xmlcatalog fails to find a local stylesheet.
1085         * configure.ac: Check for xmlcatalog.
1086         * Makefile.in: Regenerate.
1087         * configure: Likewise.
1088         * doc/Makefile.in: Likewise.
1089         * include/Makefile.in: Likewise.
1090         * libsupc++/Makefile.in: Likewise.
1091         * po/Makefile.in: Likewise.
1092         * python/Makefile.in: Likewise.
1093         * src/Makefile.in: Likewise.
1094         * src/c++11/Makefile.in: Likewise.
1095         * src/c++17/Makefile.in: Likewise.
1096         * src/c++98/Makefile.in: Likewise.
1097         * src/filesystem/Makefile.in: Likewise.
1098         * testsuite/Makefile.in: Likewise.
1099
1100 2019-02-26  Jonathan Wakely  <jwakely@redhat.com>
1101
1102         PR libstdc++/89477
1103         * include/bits/alloc_traits.h (_RequireNotAllocator): New helper for
1104         container deduction guides.
1105         * include/bits/hashtable.h (_RequireNotAllocatorOrIntegral): Likewise.
1106         * include/bits/stl_map.h (map): Use _RequireNotAllocator to constrain
1107         parameters in deduction guides.
1108         * include/bits/stl_multimap.h (multimap): Likewise.
1109         * include/bits/stl_multiset.h (multiset): Likewise.
1110         * include/bits/stl_queue.h (queue, priority_queue): Likewise.
1111         * include/bits/stl_set.h (set): Likewise.
1112         * include/bits/stl_stack.h (stack): Likewise.
1113         * include/bits/unordered_map.h (unordered_map, unordered_multimap):
1114         use _RequireNotAllocator and _RequireNotAllocatorOrIntegral to
1115         constrain parameters in deduction guides.
1116         * include/bits/unordered_set.h (unordered_set, unordered_multiset):
1117         Likewise.
1118         * testsuite/23_containers/map/cons/deduction.cc: Test additional
1119         deduction cases.
1120         * testsuite/23_containers/multiset/cons/deduction.cc: Likewise.
1121         * testsuite/23_containers/set/cons/deduction.cc: Likewise.
1122         * testsuite/23_containers/unordered_map/cons/deduction.cc: Likewise.
1123         * testsuite/23_containers/unordered_multimap/cons/deduction.cc:
1124         Likewise.
1125         * testsuite/23_containers/unordered_multiset/cons/deduction.cc:
1126         Likewise.
1127         * testsuite/23_containers/unordered_set/cons/deduction.cc: Likewise.
1128
1129         PR libstdc++/89416
1130         * include/bits/alloc_traits.h (__is_alloc_insertable_impl): Change
1131         to class template and partial specialization using void_t.
1132         (__is_copy_insertable, __is_move_insertable): Adjust base class.
1133
1134 2019-02-24  Jonathan Wakely  <jwakely@redhat.com>
1135
1136         PR libstdc++/89416
1137         * include/bits/alloc_traits.h (__is_alloc_insertable_impl): Make
1138         copy and move members public.
1139
1140 2019-02-23  Jonathan Wakely  <jwakely@redhat.com>
1141
1142         * include/std/type_traits (__underlying_type_impl): New helper to
1143         make underlying_type SFINAE-friendly.
1144         (underlying_type): Derive from __underlying_type_impl.
1145         * testsuite/20_util/underlying_type/requirements/typedefs-3.cc: New
1146         test.
1147
1148         PR libstdc++/89446
1149         * include/bits/char_traits.h (__constant_char_array): Check index is
1150         in range before dereferencing.
1151         (char_traits<char>::compare, char_traits<char>::find)
1152         (char_traits<char8_t>::compare, char_traits<char8_t>::find): Return
1153         immediately if n is zero.
1154         (char_traits<wchar_t>::compare, char_traits<wchar_t>::find): Likewise.
1155         Remove workarounds for PR 67026.
1156         * testsuite/21_strings/basic_string_view/operators/char/89446.cc:
1157         New test.
1158         * testsuite/21_strings/basic_string_view/operators/wchar_t/89446.cc:
1159         New test.
1160
1161 2019-02-22  Eric Botcazou  <ebotcazou@adacore.com>
1162
1163         * config/abi/post/sparc64-linux-gnu/baseline_symbols.txt: Adjust.
1164         * config/abi/post/sparc64-linux-gnu/32/baseline_symbols.txt: Likewise.
1165
1166 2019-02-22  Jakub Jelinek  <jakub@redhat.com>
1167
1168         PR libstdc++/89402
1169         * src/c++98/compatibility-ldbl.cc (_ZNKSt4hashIeEclEe): Change return
1170         type to std::size_t and argument to type to long double.
1171
1172 2019-02-22  Eric Botcazou  <ebotcazou@adacore.com>
1173
1174         * configure.host (abi_baseline_pair): Adjust for SPARC64/Linux.
1175         * config/abi/post/sparc64-linux-gnu: New directory.
1176         * config/abi/post/sparc64-linux-gnu/baseline_symbols.txt: New file.
1177         * config/abi/post/sparc64-linux-gnu/32: New directory.
1178         * config/abi/post/sparc64-linux-gnu/32/baseline_symbols.txt: New file.
1179
1180 2019-02-21  Jonathan Wakely  <jwakely@redhat.com>
1181
1182         * testsuite/29_atomics/headers/atomic/types_std_c++20.cc: New test.
1183         * testsuite/29_atomics/headers/atomic/types_std_c++20_neg.cc: New
1184         test.
1185
1186 2019-02-22  Tom Honermann  <tom@honermann.net>
1187
1188         * python/libstdcxx/v6/printers.py (register_type_printers): Add type
1189         printers for u8string and u8string_view.
1190
1191 2019-02-22  Tom Honermann  <tom@honermann.net>
1192
1193         * testsuite/18_support/byte/ops.cc: Validate
1194         std::to_integer<char8_t>, std::to_integer<char16_t>, and
1195         std::to_integer<char32_t>.
1196         * testsuite/18_support/numeric_limits/dr559.cc: Validate
1197         std::numeric_limits<char8_t>.
1198         * testsuite/18_support/numeric_limits/lowest.cc: Validate
1199         std::numeric_limits<char8_t>::lowest().
1200         * testsuite/18_support/numeric_limits/max_digits10.cc: Validate
1201         std::numeric_limits<char8_t>::max_digits10.
1202         * testsuite/18_support/type_info/fundamental.cc: Validate
1203         typeinfo for char8_t.
1204         * testsuite/20_util/from_chars/1_c++20_neg.cc: New test, validating
1205         std::from_chars with char8_t.
1206         * testsuite/20_util/hash/requirements/explicit_instantiation.cc:
1207         Validate explicit instantiation of std::hash<char8_t>.
1208         * testsuite/20_util/is_integral/value.cc: Validate
1209         std::is_integral<char8_t>.
1210         * testsuite/20_util/make_signed/requirements/typedefs-4.cc:
1211         Validate std::make_signed<char8_t>.
1212         * testsuite/21_strings/basic_string/cons/char/deduction.cc:
1213         Validate u8string construction from char8_t sources.
1214         * testsuite/21_strings/basic_string/types/pmr_typedefs.cc: Validate
1215         std::pmr::u8string.
1216         * testsuite/21_strings/basic_string_view/operations/compare/
1217         char/70483.cc: Validate substr operations on u8string_view.
1218         * testsuite/21_strings/basic_string_view/typedefs.cc: Validate that
1219         the u8string_view typedef is defined.
1220         * testsuite/21_strings/char_traits/requirements/
1221         constexpr_functions.cc: Validate char_traits<char8_t> constexpr
1222         member functions.
1223         * testsuite/21_strings/char_traits/requirements/
1224         constexpr_functions_c++17.cc: Validate char_traits<char8_t> C++17
1225         constexpr member functions.
1226         * testsuite/21_strings/headers/string/types_std_c++0x.cc: Validate
1227         that the u8string typedef is defined.
1228         * testsuite/22_locale/locale/cons/unicode.cc: Validate the presence
1229         of the std::codecvt<char16_t, char8_t, std::mbstate_t> and
1230         std::codecvt<char32_t, char8_t, std::mbstate_t> facets.
1231         * testsuite/29_atomics/atomic/cons/assign_neg.cc: Update line
1232         numbers.
1233         * testsuite/29_atomics/atomic/cons/copy_neg.cc: Likewise.
1234         * testsuite/29_atomics/atomic_integral/cons/assign_neg.cc:
1235         Likewise.
1236         * testsuite/29_atomics/atomic_integral/cons/copy_neg.cc: Likewise.
1237         * testsuite/29_atomics/atomic_integral/is_always_lock_free.cc:
1238         Validate std::atomic<char8_t>::is_always_lock_free
1239         * testsuite/29_atomics/atomic_integral/operators/bitwise_neg.cc:
1240         Update line numbers.
1241         * testsuite/29_atomics/atomic_integral/operators/decrement_neg.cc:
1242         Likewise.
1243         * testsuite/29_atomics/atomic_integral/operators/increment_neg.cc:
1244         Likewise.
1245         * testsuite/experimental/polymorphic_allocator/pmr_typedefs_string.cc:
1246         Validate std::experimental::pmr::u8string.
1247         * testsuite/experimental/string_view/typedefs.cc: Validate that the
1248         u8string_view typedef is defined.
1249         * testsuite/util/testsuite_common_types.h: Add char8_t, char16_t and
1250         char32_t to the typelists.
1251
1252 2019-02-22  Tom Honermann  <tom@honermann.net>
1253
1254         * include/ext/typelist.h: Constrain a partial specialization of
1255         typelist::detail::append_ to only match chain<T1,T2>.
1256
1257 2019-02-21  Jonathan Wakely  <jwakely@redhat.com>
1258
1259         PR libstdc++/89416
1260         * include/bits/alloc_traits.h (__is_alloc_insertable_impl): Replace
1261         class template with class. Replace move and copy member types with
1262         member alias templates, so they are only instantiated when needed.
1263         (__is_copy_insertable, __is_move_insertable): Adjust base class.
1264         * testsuite/23_containers/vector/modifiers/push_back/89130.cc: Enable
1265         test for C++11/14/17 as well.
1266         * testsuite/23_containers/vector/modifiers/push_back/89416.cc: New
1267         test.
1268
1269 2019-02-20  Jakub Jelinek  <jakub@redhat.com>
1270
1271         PR libstdc++/89402
1272         * src/c++98/compatibility-ldbl.cc (_ZNKSt4hashIeEclEe): Add
1273         _GLIBCXX_PURE to the alias declaration.
1274
1275 2019-02-19  Jonathan Wakely  <jwakely@redhat.com>
1276
1277         * testsuite/21_strings/basic_string/literals/types.cc
1278         [_GLIBCXX_USE_CHAR8_T]: Adjust expected string type for u8 literal.
1279         * testsuite/21_strings/basic_string/literals/values.cc
1280         [_GLIBCXX_USE_CHAR8_T]: Likewise.
1281         * testsuite/22_locale/codecvt/char16_t.cc: Adjust for u8 literals
1282         potentially having different type.
1283         * testsuite/22_locale/codecvt/char32_t.cc: Likewise.
1284         * testsuite/22_locale/codecvt/codecvt_utf8/79980.cc: Cast u8 literal
1285         to char.
1286         * testsuite/22_locale/codecvt/codecvt_utf8/wchar_t/1.cc: Likewise.
1287         * testsuite/22_locale/codecvt/utf8.cc: Likewise.
1288         * testsuite/22_locale/conversions/string/2.cc: Remove u8 prefix from
1289         string literals only using basic character set.
1290         * testsuite/22_locale/conversions/string/3.cc: Likewise. Cast other
1291         u8 literals to char.
1292         * testsuite/29_atomics/headers/atomic/macros.cc [_GLIBCXX_USE_CHAR8_T]:
1293         Test ATOMIC_CHAR8_T_LOCK_FREE.
1294         Add missing #error to ATOMIC_CHAR16_T_LOCK_FREE test.
1295         * testsuite/29_atomics/headers/atomic/types_std_c++0x.cc
1296         [_GLIBCXX_USE_CHAR8_T]: Check for std::atomic_char8_t.
1297         * testsuite/experimental/string_view/literals/types.cc
1298         [_GLIBCXX_USE_CHAR8_T]: Adjust expected string_view type for u8
1299         literal.
1300         * testsuite/experimental/string_view/literals/values.cc
1301         [_GLIBCXX_USE_CHAR8_T]: Likewise.
1302
1303 2019-02-19  Tom Honermann  <tom@honermann.net>
1304
1305         * testsuite/18_support/numeric_limits/char8_t.cc: New test cloned
1306         from char16_32_t.cc; validates numeric_limits<char8_t>.
1307         * testsuite/21_strings/basic_string/literals/types-char8_t.cc: New
1308         test cloned from types.cc; validates operator""s for char8_t
1309         returns u8string.
1310         * testsuite/21_strings/basic_string/literals/values-char8_t.cc: New
1311         test cloned from values.cc; validates construction and comparison
1312         of u8string values.
1313         * testsuite/21_strings/basic_string/requirements/
1314         /explicit_instantiation/char8_t/1.cc: New test cloned from
1315         char16_t/1.cc; validates explicit instantiation of
1316         basic_string<char8_t>.
1317         * testsuite/21_strings/basic_string_view/literals/types-char8_t.cc:
1318         New test cloned from types.cc; validates operator""sv for char8_t
1319         returns u8string_view.
1320         * testsuite/21_strings/basic_string_view/literals/
1321         values-char8_t.cc: New test cloned from values.cc; validates
1322         construction and comparison of u8string_view values.
1323         * testsuite/21_strings/basic_string_view/requirements/
1324         explicit_instantiation/char8_t/1.cc: New test cloned from
1325         char16_t/1.cc; validates explicit instantiation of
1326         basic_string_view<char8_t>.
1327         * testsuite/21_strings/char_traits/requirements/char8_t/65049.cc:
1328         New test cloned from char16_t/65049.cc; validates that
1329         char_traits<char8_t> is not vulnerable to the concerns in PR65049.
1330         * testsuite/21_strings/char_traits/requirements/char8_t/
1331         typedefs.cc: New test cloned from char16_t/typedefs.cc; validates
1332         that char_traits<char8_t> member typedefs are present and correct.
1333         * testsuite/21_strings/char_traits/requirements/
1334         explicit_instantiation/char8_t/1.cc: New test cloned from
1335         char16_t/1.cc; validates explicit instantiation of
1336         char_traits<char8_t>.
1337         * testsuite/22_locale/codecvt/char16_t-char8_t.cc: New test cloned
1338         from char16_t.cc: validates
1339         codecvt<char16_t, char8_t, mbstate_t>.
1340         * testsuite/22_locale/codecvt/char32_t-char8_t.cc: New test cloned
1341         from char32_t.cc: validates
1342         codecvt<char32_t, char8_t, mbstate_t>.
1343         * testsuite/22_locale/codecvt/utf8-char8_t.cc: New test cloned from
1344         utf8.cc; validates codecvt<char16_t, char8_t, std::mbstate_t> and
1345         codecvt<char32_t, char8_t, std::mbstate_t>.
1346         * testsuite/27_io/filesystem/path/native/string-char8_t.cc: New
1347         test cloned from string.cc; validates filesystem::path construction
1348         from char8_t input.
1349         * testsuite/experimental/feat-char8_t.cc: New test; validates that
1350         the __cpp_lib_char8_t feature test macro is defined with the
1351         correct value.
1352         * testsuite/experimental/filesystem/path/native/string-char8_t.cc:
1353         New test cloned from string.cc; validates filesystem::path
1354         construction from char8_t input.
1355         * testsuite/experimental/string_view/literals/types-char8_t.cc: New
1356         test cloned from types.cc; validates operator""sv for char8_t
1357         returns u8string_view.
1358         * testsuite/experimental/string_view/literals/values-char8_t.cc:
1359         New test cloned from values.cc; validates construction and
1360         comparison of u8string_view values.
1361         * testsuite/experimental/string_view/requirements/
1362         explicit_instantiation/char8_t/1.cc: New test cloned from
1363         char16_t/1.cc; validates explicit instantiation of
1364         basic_string_view<char8_t>.
1365         * testsuite/ext/char8_t/atomic-1.cc: New test; validates that
1366         ATOMIC_CHAR8_T_LOCK_FREE is not defined if char8_t support is not
1367         enabled.
1368
1369 2019-02-19  Tom Honermann  <tom@honermann.net>
1370
1371         P0482R5 char8_t: Standard library support
1372         * config/abi/pre/gnu-versioned-namespace.ver (CXXABI_2.0): Add
1373         typeinfo symbols for char8_t.
1374         * config/abi/pre/gnu.ver: Add CXXABI_1.3.12.
1375         (GLIBCXX_3.4.26): Add symbols for specializations of
1376         numeric_limits and codecvt that involve char8_t.
1377         (CXXABI_1.3.12): Add typeinfo symbols for char8_t.
1378         * include/bits/atomic_base.h: Add atomic_char8_t.
1379         * include/bits/basic_string.h: Add std::hash<u8string> and
1380         operator""s(const char8_t*, size_t).
1381         * include/bits/c++config: Define _GLIBCXX_USE_CHAR8_T and
1382         __cpp_lib_char8_t.
1383         * include/bits/char_traits.h: Add char_traits<char8_t>.
1384         * include/bits/codecvt.h: Add
1385         codecvt<char16_t, char8_t, mbstate_t>,
1386         codecvt<char32_t, char8_t, mbstate_t>,
1387         codecvt_byname<char16_t, char8_t, mbstate_t>, and
1388         codecvt_byname<char32_t, char8_t, mbstate_t>.
1389         * include/bits/cpp_type_traits.h: Add __is_integer<char8_t> to
1390         recognize char8_t as an integral type.
1391         * include/bits/fs_path.h: (path::__is_encoded_char): Recognize
1392         char8_t.
1393         (path::u8string): Return std::u8string when char8_t support is
1394         enabled.
1395         (path::generic_u8string): Likewise.
1396         (path::_S_convert): Handle conversion from char8_t input.
1397         (path::_S_str_convert): Likewise.
1398         * include/bits/functional_hash.h: Add hash<char8_t>.
1399         * include/bits/locale_conv.h (__str_codecvt_out): Add overloads for
1400         char8_t.
1401         * include/bits/locale_facets.h (_GLIBCXX_NUM_UNICODE_FACETS): Bump
1402         for new char8_t specializations.
1403         * include/bits/localefwd.h: Add missing declarations of
1404         codecvt<char16_t, char, mbstate_t> and
1405         codecvt<char32_t, char, mbstate_t>.  Add char8_t declarations
1406         codecvt<char16_t, char8_t, mbstate_t> and
1407         codecvt<char32_t, char8_t, mbstate_t>.
1408         * include/bits/postypes.h: Add u8streampos
1409         * include/bits/stringfwd.h: Add declarations of
1410         char_traits<char8_t> and u8string.
1411         * include/c_global/cstddef: Add __byte_operand<char8_t>.
1412         * include/experimental/bits/fs_path.h (path::__is_encoded_char):
1413         Recognize char8_t.
1414         (path::u8string): Return std::u8string when char8_t support is
1415         enabled.
1416         (path::generic_u8string): Likewise.
1417         (path::_S_convert): Handle conversion from char8_t input.
1418         (path::_S_str_convert): Likewise.
1419         * include/experimental/string: Add u8string.
1420         * include/experimental/string_view: Add u8string_view,
1421         hash<experimental::u8string_view>, and
1422         operator""sv(const char8_t*, size_t).
1423         * include/std/atomic: Add atomic<char8_t> and atomic_char8_t.
1424         * include/std/charconv (__is_int_to_chars_type): Recognize char8_t
1425         as a character type.
1426         * include/std/limits: Add numeric_limits<char8_t>.
1427         * include/std/string_view: Add u8string_view,
1428         hash<experimental::u8string_view>, and
1429         operator""sv(const char8_t*, size_t).
1430         * include/std/type_traits: Add __is_integral_helper<char8_t>,
1431         __make_unsigned<char8_t>, and __make_signed<char8_t>.
1432         * libsupc++/atomic_lockfree_defines.h: Define
1433         ATOMIC_CHAR8_T_LOCK_FREE.
1434         * src/c++11/Makefile.am: Compile with -fchar8_t when compiling
1435         codecvt.cc and limits.cc so that char8_t specializations of
1436         numeric_limits and codecvt and emitted.
1437         * src/c++11/Makefile.in: Likewise.
1438         * src/c++11/codecvt.cc: Define members of
1439         codecvt<char16_t, char8_t, mbstate_t>,
1440         codecvt<char32_t, char8_t, mbstate_t>,
1441         codecvt_byname<char16_t, char8_t, mbstate_t>, and
1442         codecvt_byname<char32_t, char8_t, mbstate_t>.
1443         * src/c++11/limits.cc: Define members of
1444         numeric_limits<char8_t>.
1445         * src/c++98/Makefile.am: Compile with -fchar8_t when compiling
1446         locale_init.cc and localename.cc.
1447         * src/c++98/Makefile.in: Likewise.
1448         * src/c++98/locale_init.cc: Add initialization for the
1449         codecvt<char16_t, char8_t, mbstate_t> and
1450         codecvt<char32_t, char8_t, mbstate_t> facets.
1451         * src/c++98/localename.cc: Likewise.
1452         * testsuite/util/testsuite_abi.cc: Validate ABI bump.
1453
1454 2019-02-18  Wilco Dijkstra  <wdijkstr@arm.com>
1455
1456         * 27_io/filesystem/operations/all.cc: Add dg-require-filesystem-ts.
1457         * 27_io/filesystem/operations/resize_file.cc: Likewise.
1458         * 27_io/filesystem/path/generation/normal2.cc: Likewise.
1459
1460 2019-02-14  Jonathan Wakely  <jwakely@redhat.com>
1461
1462         * doc/xml/manual/status_cxx2020.xml: Update P0887R1 status.
1463         * doc/html/*: Regenerate.
1464
1465         * doc/xml/manual/status_cxx2017.xml: Add P0063R3 to status table.
1466         * doc/html/*: Regenerate.
1467
1468         * doc/xml/manual/intro.xml: Document LWG 2586 status.
1469         * include/bits/uses_allocator.h (__uses_alloc): Use const lvalue
1470         allocator type in is_constructible checks.
1471         * testsuite/20_util/scoped_allocator/69293_neg.cc: Adjust dg-error.
1472         * testsuite/20_util/scoped_allocator/dr2586.cc: New test.
1473         * testsuite/20_util/tuple/cons/allocators.cc: Add test using
1474         problematic type from LWG 2586 discussion.
1475         * testsuite/20_util/uses_allocator/69293_neg.cc: Adjust dg-error.
1476         * testsuite/20_util/uses_allocator/cons_neg.cc: Likewise.
1477
1478         * configure.ac: Check for C11 timespec_get function.
1479         * crossconfig.m4 (freebsd, linux, gnu, cygwin, solaris, netbsd)
1480         (openbsd): Likewise
1481         * config.h.in: Regenerate.
1482         * configure: Regenerate.
1483         * include/c_global/ctime (timespec, timespec_get): Add to namespace
1484         std for C++17 and up.
1485
1486         * doc/xml/manual/intro.xml: Document LWG 2537 status.
1487         * include/bits/stl_queue.h
1488         (priority_queue(const Compare&, const Container&, const Alloc&))
1489         (priority_queue(const Compare&, Container&&, const Alloc&)): Call
1490         make_heap.
1491         * testsuite/23_containers/priority_queue/dr2537.cc: New test.
1492
1493         * doc/xml/manual/intro.xml: Document LWG 2566 status.
1494         * include/bits/stl_queue.h (queue, priority_queue): Add static
1495         assertions to enforce LWG 2566 requirement on value_type.
1496         * include/bits/stl_stack.h (stack): Likewise.
1497
1498         PR middle-end/89303
1499         * testsuite/20_util/enable_shared_from_this/89303.cc: New test.
1500
1501         * doc/xml/manual/intro.xml: Document LWG 2735 status.
1502         * include/bits/std_abs.h: Add comment about LWG 2735.
1503         * testsuite/26_numerics/headers/cstdlib/dr2735.cc: New test.
1504
1505 2019-02-13  Jonathan Wakely  <jwakely@redhat.com>
1506
1507         PR libstdc++/89345
1508         * include/std/version [__cpp_impl_destroying_delete]
1509         (__cpp_lib_destroying_delete): Only define for C++2a and later.
1510         * libsupc++/new [__cpp_impl_destroying_delete]
1511         (__cpp_lib_destroying_delete): Likewise.
1512         (destroying_delete_t, destroying_delete): Likewise, but define even
1513         when __cpp_impl_destroying_delete is not defined.
1514         * testsuite/18_support/destroying_delete.cc: New test.
1515
1516 2019-02-11  Jonathan Wakely  <jwakely@redhat.com>
1517
1518         PR libstdc++/89023
1519         * testsuite/17_intro/headers/c++2011/parallel_mode.cc: New test.
1520         * testsuite/17_intro/headers/c++2014/parallel_mode.cc: New test.
1521         * testsuite/17_intro/headers/c++2017/parallel_mode.cc: New test.
1522         * testsuite/28_regex/headers/regex/parallel_mode.cc: Remove.
1523
1524 2019-02-09  Jonathan Wakely  <jwakely@redhat.com>
1525
1526         PR libstdc++/71044
1527         * include/bits/fs_path.h (path::has_root_name)
1528         (path::has_root_directory, path::has_root_path)
1529         (path::has_relative_path, path::has_parent_path)
1530         (path::has_filename, path::has_stem, path::has_extension)
1531         (path::is_absolute, path::is_relative, path::_M_find_extension): Add
1532         noexcept.
1533         * src/c++17/fs_path.cc (path::has_root_name)
1534         (path::has_root_directory, path::has_root_path)
1535         (path::has_relative_path, path::has_parent_path)
1536         (path::has_filename, path::_M_find_extension): Add noexcept.
1537
1538 2019-02-06  Jonathan Wakely  <jwakely@redhat.com>
1539
1540         PR libstdc++/89102 (partial)
1541         * include/std/type_traits (common_type<>): Define.
1542         (common_type<T>): Derive from common_type<T, T>.
1543         * testsuite/20_util/common_type/requirements/explicit_instantiation.cc:
1544         Test zero-length template argument list.
1545         * testsuite/20_util/common_type/requirements/sfinae_friendly_1.cc:
1546         Test additional single argument cases.
1547         * testsuite/20_util/common_type/requirements/sfinae_friendly_2.cc:
1548         Adjust expected error.
1549
1550 2019-02-05  Jonathan Wakely  <jwakely@redhat.com>
1551
1552         PR libstdc++/89128
1553         * include/bits/stl_queue.h (queue, priority_queue): Add deduction
1554         guides.
1555         * include/bits/stl_stack.h (stack): Likewise.
1556         * testsuite/23_containers/priority_queue/deduction.cc: New test.
1557         * testsuite/23_containers/queue/deduction.cc: New test.
1558         * testsuite/23_containers/stack/deduction.cc: New test.
1559
1560         PR libstdc++/89194
1561         * include/std/type_traits (__is_convertible_helper)
1562         (__is_convertible_helper<_From, _To, false>): Revert changes to
1563         support is_nothrow_convertible.
1564         (__is_nt_convertible_helper): New helper.
1565         (is_nothrow_convertible): Use __is_nt_convertible_helper.
1566
1567         * testsuite/23_containers/vector/modifiers/push_back/49836.cc: Restore
1568         use of CopyConsOnlyType, but also test DelAnyAssign for completeness.
1569
1570         PR libstdc++/89130
1571         * include/bits/alloc_traits.h (__is_copy_insertable_impl): Rename to
1572         __is_alloc_insertable_impl. Replace single type member with two
1573         members, one for each of copy and move insertable.
1574         (__is_move_insertable): New trait for internal use.
1575         * include/bits/stl_vector.h (vector::_S_nothrow_relocate(true_type))
1576         (vector::_S_nothrow_relocate(true_type)): New functions to
1577         conditionally check if __relocate_a can throw.
1578         (vector::_S_use_relocate()): Dispatch to _S_nothrow_relocate based
1579         on __is_move_insertable.
1580         (vector::_S_do_relocate): New overloaded functions to conditionally
1581         call __relocate_a.
1582         (vector::_S_relocate): New function that dispatches to _S_do_relocate
1583         based on _S_use_relocate.
1584         * include/bits/vector.tcc (vector::reserve, vector::_M_realloc_insert)
1585         (vector::_M_default_append): Call _S_relocate instead of __relocate_a.
1586         * testsuite/23_containers/vector/modifiers/push_back/89130.cc: New.
1587
1588         PR libstdc++/89090
1589         * include/bits/stl_uninitialized.h (__relocate_a_1): Make unused
1590         parameter unnamed. Add message to static assertion.
1591         * include/bits/vector.tcc (vector::reserve, vector::_M_realloc_insert)
1592         (vector::_M_default_append): Use _GLIBCXX17_CONSTEXPR for if constexpr
1593         in C++11 code.
1594
1595 2019-02-05  Marc Glisse  <marc.glisse@inria.fr>
1596
1597         PR libstdc++/87106
1598         * include/bits/stl_uninitialized.h (__is_trivially_relocatable):
1599         Rename...
1600         (__is_bitwise_relocatable): ... to this.
1601         (__relocate_a_1): Adapt.
1602         * include/bits/stl_deque.h (__is_trivially_relocatable): Rename...
1603         (__is_bitwise_relocatable): ... to this.
1604
1605 2019-01-30  Jonathan Wakely  <jwakely@redhat.com>
1606
1607         PR libstdc++/89117
1608         * src/c++17/fs_path.cc (path::replace_extension): Erase extension from
1609         final component as well as from _M_pathname. Append the dot using
1610         operator+= instead of only to _M_pathname.
1611         (path::_M_find_extension): Reformat slightly.
1612         * testsuite/27_io/filesystem/path/modifiers/replace_extension.cc:
1613         Add more test cases.
1614
1615 2019-01-30  Ulrich Drepper  <drepper@redhat.com>
1616
1617         * doc/xml/manual/status_cxx2020.xml: Update P0600 entry.
1618
1619 2019-01-29  Jonathan Wakely  <jwakely@redhat.com>
1620
1621         * testsuite/26_numerics/headers/complex/synopsis.cc: Remove incorrect
1622         constexpr specifiers from arg and proj.
1623
1624         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Add missing exports for
1625         __shared_ptr instantiations used by gcc4-compatible ABI.
1626
1627         * include/experimental/forward_list (experimental::erase): Qualify
1628         call to erase_if.
1629         * include/experimental/list (experimental::erase): Likewise.
1630         * include/std/forward_list (std::erase): Likewise.
1631         * include/std/list (std::erase): Likewise.
1632
1633         * testsuite/20_util/reference_wrapper/result_type.cc: Disable for
1634         C++2a.
1635         * testsuite/20_util/reference_wrapper/typedefs-2.cc: Likewise.
1636         * testsuite/20_util/reference_wrapper/typedefs-3.cc: Likewise.
1637         * testsuite/20_util/reference_wrapper/typedefs.cc: Likewise.
1638         * testsuite/30_threads/async/54297.cc: Suppress nodiscard warning.
1639         * testsuite/ext/array_allocator/26875.cc: Likewise.
1640         * testsuite/ext/pool_allocator/allocate_chunk.cc: Likewise.
1641         * testsuite/util/replacement_memory_operators.h: Likewise.
1642         * testsuite/util/testsuite_allocator.h: Likewise.
1643
1644         * include/std/memory_resource (__pool_resource::_M_unpooled): Use
1645         normal mode vector, even for debug mode.
1646         * include/std/vector [_GLIBCXX_DEBUG] (_GLIBCXX_STD_C::pmr::vector):
1647         Define alias template for normal mode vector.
1648
1649 2019-01-28  Jonathan Wakely  <jwakely@redhat.com>
1650
1651         PR libstdc++/68737
1652         * config/locale/generic/c_locale.h (__convert_from_v)
1653         [_GLIBCXX_USE_C99_STDIO]: Also check _GLIBCXX_HAVE_BROKEN_VSNPRINTF.
1654         * config/os/hpux/os_defines.h: Define _GLIBCXX_HAVE_BROKEN_VSNPRINTF.
1655         * include/bits/locale_facets.tcc (num_put::_M_insert_float)
1656         [_GLIBCXX_USE_C99_STDIO]: Also check _GLIBCXX_HAVE_BROKEN_VSNPRINTF.
1657
1658 2019-01-24  Jonathan Wakely  <jwakely@redhat.com>
1659
1660         PR libstdc++/88840
1661         * include/bits/stl_vector.h (vector::__use_relocate): Replace static
1662         data member with static member function _S_use_relocate().
1663         * include/bits/vector.tcc (vector::reserve, vector::_M_realloc_insert)
1664         (vector::_M_default_append): Use _S_use_relocate() instead of
1665         __use_relocate.
1666
1667         * testsuite/27_io/filesystem/path/compare/strings.cc: Only compare
1668         sign of results.
1669
1670 2019-01-22  Jonathan Wakely  <jwakely@redhat.com>
1671
1672         PR libstdc++/88740
1673         * testsuite/util/testsuite_hooks.h [stderr] (VERIFY): Use fprintf to
1674         write to stderr instead of using printf.
1675
1676 2019-01-21  Jakub Jelinek  <jakub@redhat.com>
1677
1678         PR libstdc++/86590
1679         * include/bits/char_traits.h (__constant_string_p,
1680         __constant_char_array_p): Use __builtin_is_constant_evaluated if
1681         available.
1682
1683 2019-01-20  Ulrich Drepper  <drepper@redhat.com>
1684
1685         Implement C++20 P0600r1.
1686         * include/backward/hash_map: Add nodiscard attribute to empty.
1687         * include/backward/hash_set: Likewise.
1688         * backward/hashtable.h: Likewise.
1689         * include/bits/basic_string.h: Likewise.
1690         * include/bits/forward_list.h: Likewise.
1691         * include/bits/hashtable.h: Likewise.
1692         * include/bits/regex.h: Likewise.
1693         * include/bits/stl_deque.h: Likewise.
1694         * include/bits/stl_list.h: Likewise.
1695         * include/bits/stl_map.h: Likewise.
1696         * include/bits/stl_multimap.h: Likewise.
1697         * include/bits/stl_multiset.h: Likewise.
1698         * include/bits/stl_queue.h: Likewise.
1699         * include/bits/stl_set.h: Likewise.
1700         * include/bits/stl_stack.h: Likewise.
1701         * include/bits/stl_tree.h: Likewise.
1702         * include/bits/stl_vector.h: Likewise.
1703         * include/bits/unordered_map.h: Likewise.
1704         * include/bits/unordered_set.h: Likewise.
1705         * include/debug/array: Likewise.
1706         * include/experimental/any: Likewise.
1707         * include/experimental/bits/fs_path.h: Likewise.
1708         * include/experimental/internet: Likewise.
1709         * include/experimental/string_view: Likewise.
1710         * include/ext/pb_ds/detail/bin_search_tree_/info_fn_imps.hpp:
1711         Likewise.
1712         * include/ext/pb_ds/detail/binary_heap_/binary_heap_.hpp:
1713         Likewise.
1714         * include/ext/pb_ds/detail/binary_heap_/info_fn_imps.hpp:
1715         Likewise.
1716         * include/ext/pb_ds/detail/cc_hash_table_map_/cc_ht_map_.hpp:
1717         Likewise.
1718         * include/ext/pb_ds/detail/cc_hash_table_map_/info_fn_imps.hpp:
1719         Likewise.
1720         * include/ext/pb_ds/detail/cc_hash_table_map_/size_fn_imps.hpp:
1721         Likewise.
1722         * include/ext/pb_ds/detail/gp_hash_table_map_/gp_ht_map_.hpp:
1723         Likewise.
1724         * include/ext/pb_ds/detail/gp_hash_table_map_/info_fn_imps.hpp:
1725         Likewise.
1726         * include/ext/pb_ds/detail/left_child_next_sibling_heap_/
1727         info_fn_imps.hpp: Likewise.
1728         * include/ext/pb_ds/detail/left_child_next_sibling_heap_/
1729         left_child_next_sibling_heap_.hpp: Likewise.
1730         * include/ext/pb_ds/detail/list_update_map_/info_fn_imps.hpp:
1731         Likewise.
1732         * include/ext/pb_ds/detail/list_update_map_/lu_map_.hpp:
1733         Likewise.
1734         * include/ext/pb_ds/detail/ov_tree_map_/info_fn_imps.hpp:
1735         Likewise.
1736         * include/ext/pb_ds/detail/ov_tree_map_/ov_tree_map_.hp:
1737         Likewise.
1738         * include/ext/pb_ds/detail/pat_trie_/info_fn_imps.hpp:
1739         Likewise.
1740         * include/ext/pb_ds/detail/pat_trie_/pat_trie_.hpp:
1741         Likewise.
1742         * include/ext/pb_ds/detail/rc_binomial_heap_/rc.hpp:
1743         Likewise.
1744         * include/ext/pb_ds/detail/tree_trace_base.hpp: Likewise.
1745         * include/ext/pb_ds/trie_policy.hpp: Likewise.
1746         * include/ext/rope: Likewise.
1747         * include/ext/slist: Likewise.
1748         * include/ext/vstring.h: Likewise.
1749         * include/profile/array: Likewise.
1750         * include/std/array: Likewise.
1751         * include/tr1/array: Likewise.
1752         * include/tr1/hashtable.h: Likewise.
1753         * include/tr1/regex: Likewise.
1754         * include/tr2/dynamic_bitset: Likewise.
1755         * include/bits/alloc_traits.h: Add nodiscard attribute to
1756         allocate.
1757         * include/experimental/memory_resource: Likewise.
1758         * include/ext/alloc_traits.h: Likewise.
1759         * include/ext/array_allocator.h: Likewise.
1760         * include/ext/bitmap_allocator.h: Likewise.
1761         * include/ext/debug_allocator.h: Likewise.
1762         * include/ext/extptr_allocator.h: Likewise.
1763         * include/ext/mt_allocator.h: Likewise.
1764         * include/ext/new_allocator.h: Likewise.
1765         * include/ext/pool_allocator.h: Likewise.
1766         * include/ext/throw_allocator.h: Likewise.
1767         * include/std/scoped_allocator: Likewise.
1768         * libsupc++/eh_alloc.cc: Likewise.
1769         * include/std/future: Add nodiscard attribute to async.
1770         * libsupc++/new: Add nodiscard attribute to new.
1771
1772 2019-01-18  Jonathan Wakely  <jwakely@redhat.com>
1773
1774         PR libstdc++/87514
1775         PR libstdc++/87520
1776         PR libstdc++/88782
1777         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Export new symbol.
1778         * include/bits/shared_ptr.h
1779         (shared_ptr(_Sp_make_shared_tag, const Alloc&, Args&&...))
1780         (allocate_shared): Change to use new tag type.
1781         * include/bits/shared_ptr_base.h (_Sp_make_shared_tag::_S_eq):
1782         Declare new member function.
1783         (_Sp_alloc_shared_tag): Define new type.
1784         (_Sp_counted_ptr_inplace): Declare __shared_count<_Lp> as a friend.
1785         (_Sp_counted_ptr_inplace::_M_get_deleter) [!__cpp_rtti]: Use
1786         _Sp_make_shared_tag::_S_eq to check type_info.
1787         (__shared_count(Ptr, Deleter),__shared_count(Ptr, Deleter, Alloc)):
1788         Constrain to prevent being called with _Sp_alloc_shared_tag.
1789         (__shared_count(_Sp_make_shared_tag, const _Alloc&, Args&&...)):
1790         Replace constructor with ...
1791         (__shared_count(Tp*&, _Sp_alloc_shared_tag<_Alloc>, Args&&...)): Use
1792         reference parameter so address of the new object can be returned to
1793         the caller. Obtain the allocator from the tag type.
1794         (__shared_ptr(_Sp_make_shared_tag, const Alloc&, Args&&...)): Replace
1795         constructor with ...
1796         (__shared_ptr(_Sp_alloc_shared_tag<Alloc>, Args&&...)): Pass _M_ptr
1797         to the __shared_count constructor.
1798         (__allocate_shared): Change to use new tag type.
1799         * src/c++11/shared_ptr.cc (_Sp_make_shared_tag::_S_eq): Define.
1800
1801 2019-01-17  Jonathan Wakely  <jwakely@redhat.com>
1802
1803         * src/c++17/fs_ops.cc
1804         (equivalent(const path&, const path&, error_code&))
1805         [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Use GetFileInformationByHandle to
1806         compare files instead of relying on incomplete info returned by stat.
1807
1808         PR libstdc++/88884
1809         * src/c++17/fs_ops.cc (absolute(const path&, error_code&)): Do nothing
1810         if the path is already absolute.
1811         [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Normalize root-directory.
1812         [!_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Pass error_code to current_path.
1813
1814         PR libstdc++/88881
1815         * src/c++17/fs_ops.cc (canonical(const path&, error_code&))
1816         [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Normalize path, to match behaviour
1817         of filesystem::exists.
1818         (create_directories(const path&, error_code&)): Add assertions.
1819         (status(const path&, error_code&)) [_GLIBCXX_FILESYSTEM_IS_WINDOWS]:
1820         Add workaround for bug in _wstat for paths with trailing slash.
1821         * testsuite/27_io/filesystem/operations/create_directories.cc: Adjust
1822         for expected behaviour on mingw.
1823         * testsuite/experimental/filesystem/operations/create_directories.cc:
1824         Likewise.
1825         * testsuite/27_io/filesystem/operations/temp_directory_path.cc: Use
1826         "TMP" instead of "TMPDIR" and clean environment before each test. Do
1827         not test permissions on mingw targets.
1828
1829 2019-01-16  Jonathan Wakely  <jwakely@redhat.com>
1830
1831         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Add exports for fstream
1832         constructors and open members taking wide strings. Fix patterns for
1833         filesystem::path members to match wstring_view parameters. Add
1834         exports for shared_ptr members used by directory iterators.
1835         * src/c++17/fs_ops.cc (remove(const path&, error_code&)): Clear the
1836         error code parameter if the file doesn't exist.
1837         * src/filesystem/ops.cc (remove(const path&, error_code&)):
1838         Likewise.
1839         * testsuite/27_io/filesystem/operations/canonical.cc: Fix expected
1840         values for mingw targets, where "/" is not an absolute path. Do not
1841         test symlinks on mingw targets.
1842         * testsuite/experimental/filesystem/operations/canonical.cc: Likewise.
1843         * testsuite/27_io/filesystem/operations/copy.cc: Do not test symlinks
1844         on mingw targets.
1845         * testsuite/experimental/filesystem/operations/copy.cc: Likewise.
1846         * testsuite/27_io/filesystem/operations/create_directories.cc: Check
1847         that each component of the path is created.
1848         * testsuite/experimental/filesystem/operations/create_directories.cc:
1849         Likewise.
1850         * testsuite/27_io/filesystem/operations/exists.cc: Do not test
1851         permissions on mingw targets.
1852         * testsuite/experimental/filesystem/operations/exists.cc: Likewise.
1853         * testsuite/27_io/filesystem/operations/is_empty.cc: Likewise.
1854         * testsuite/experimental/filesystem/operations/is_empty.cc: Likewise.
1855         * testsuite/27_io/filesystem/operations/permissions.cc: XFAIL for
1856         mingw targets.
1857         * testsuite/experimental/filesystem/operations/permissions.cc:
1858         Likewise.
1859         * testsuite/27_io/filesystem/operations/remove.cc: Do not test
1860         symlinks or permissions on mingw targets.
1861         * testsuite/experimental/filesystem/operations/remove.cc: Likewise.
1862         * testsuite/27_io/filesystem/operations/remove_all.cc: Do not test
1863         symlinks on mingw targets.
1864         * testsuite/experimental/filesystem/operations/remove_all.cc:
1865         Likewise.
1866         * testsuite/27_io/filesystem/operations/status.cc: Do not test
1867         permissions on mingw targets.
1868         * testsuite/27_io/filesystem/operations/weakly_canonical.cc: Do not
1869         test symlinks on mingw targets.
1870         * testsuite/experimental/filesystem/operations/space.cc: Fix test
1871         for mingw targets.
1872
1873 2019-02-14  Ulrich Drepper  <drepper@redhat.com>
1874
1875         PR libstdc++/88738
1876         Warn about unused comparisons of shared_ptr/unique_ptr
1877         * include/bits/c++config [_GLIBCXX_NODISCARD]: Define.
1878         * include/bits/shared_ptr.h: Use it for operator ==, !=,
1879         <, <=, >, >= for shared_ptr.
1880         * include/bits/unique_ptr.h: Likewise for unique_ptr.
1881
1882 2019-01-15  Jonathan Wakely  <jwakely@redhat.com>
1883
1884         * include/bits/shared_ptr_base.h (__cpp_lib_shared_ptr_arrays): Define
1885         as 201611L, because P0497R0 changes are supported.
1886         * include/std/version (__cpp_lib_shared_ptr_arrays): Likewise.
1887
1888         * include/bits/erase_if.h [__cplusplus > 201703L]
1889         (__cpp_lib_erase_if): Only define for C++2a.
1890         * include/std/iterator [__cplusplus >= 201402L && !_GLIBCXX_DEBUG]
1891         (__cpp_lib_null_iterators): Define.
1892         * include/std/version [__cplusplus >= 201402L && !_GLIBCXX_DEBUG]
1893         (__cpp_lib_null_iterators): Define.
1894         [__cpp_impl_destroying_delete] (__cpp_lib_destroying_delete): Define.
1895
1896         * doc/xml/manual/status_cxx2017.xml: Document P0032R3 and P0307R2
1897         status.
1898         * include/bits/stl_uninitialized.h (__cpp_lib_raw_memory_algorithms):
1899         Define.
1900         * include/std/any (__cpp_lib_any): Define as 201606L, because P0032R3
1901         changes are supported.
1902         * include/std/optional (__cpp_lib_optional): Likewise.
1903         * include/std/variant (__cpp_lib_variant): Likewise.
1904         * include/std/version [!__STRICT_ANSI__]
1905         (__cpp_lib_uncaught_exceptions): Define as long integer.
1906         [__cplusplus >= 201703L] (__cpp_lib_any)
1907         (__cpp_lib_raw_memory_algorithms, __cpp_lib_uncaught_exceptions)
1908         (__cpp_lib_variant): Define for C++17.
1909         [__cplusplus >= 201703L] (__cpp_lib_optional): Update value and define
1910         as long integer.
1911         * libsupc++/exception (__cpp_lib_uncaught_exceptions): Define as long
1912         integer.
1913
1914         * doc/xml/manual/status_cxx2020.xml: Update P1123R0 status.
1915
1916 2019-01-12  Jonathan Wakely  <jwakely@redhat.com>
1917
1918         PR libstdc++/88811
1919         PR libstdc++/83306
1920         * src/filesystem/path.cc: Fix typo. If first path is empty, show []
1921         before second path.
1922         * testsuite/experimental/filesystem/filesystem_error/cons.cc: New
1923         test.
1924
1925 2019-01-11  Jonathan Wakely  <jwakely@redhat.com>
1926
1927         * doc/xml/manual/intro.xml: Include new section.
1928         * doc/xml/manual/status_cxx2017.xml: Document more
1929         implementation-defined properties of the library.
1930         * doc/xml/manual/status_cxx2020.xml: Document C++2a status.
1931         * doc/html/*: Regenerate.
1932
1933         * include/bits/refwrap.h [__cplusplus > 201703L]
1934         (_Refwrap_base_arg1, _Refwrap_base_arg2, _Reference_wrapper_base)
1935         (_Reference_wrapper_base_memfun): Do not define for C++2a.
1936         (reference_wrapper): Do not derive from _Reference_wrapper_base_memfun
1937         for C++2a.
1938         (reference_wrapper::operator()): Add static assertion.
1939         * testsuite/20_util/reference_wrapper/incomplete.cc: New test.
1940
1941         * include/std/chrono (duration_values::zero(), duration_values::min())
1942         (duration_values::max()): Add noexcept.
1943         (duration::zero(), duration::min(), duration::max()): Likewise.
1944         (time_point::zero(), time_point::min(), time_point::max()): Likewise.
1945         * testsuite/20_util/duration/requirements/noexcept.cc: New test.
1946         * testsuite/20_util/time_point/requirements/noexcept.cc: New test.
1947
1948         * include/std/version (__cpp_lib_erase_if): Move to C++20 group.
1949
1950 2019-01-11  Jakub Jelinek  <jakub@redhat.com>
1951
1952         * include/std/type_traits (__cpp_lib_is_constant_evaluated): Define.
1953         * include/std/version (__cpp_lib_is_constant_evaluated): Define.
1954
1955 2019-01-11  Jonathan Wakely  <jwakely@redhat.com>
1956
1957         PR libstdc++/88802
1958         * include/bits/functional_hash.h (hash<nullptr_t>): Define
1959         specialization for C++17 (P0513R0, LWG 2817).
1960         * testsuite/20_util/hash/nullptr.cc: New test.
1961
1962         PR libstdc++/88125
1963         * config/abi/pre/gnu.ver (GLIBCXX_3.4.6): Remove unused duplicate
1964         pattern for std::basic_stringbuf::str().
1965
1966         * config/abi/pre/gnu.ver (GLIBCXX_3.4): Correct recent changes to
1967         basic_ostream::operator<< patterns.
1968
1969 2019-01-10  Jonathan Wakely  <jwakely@redhat.com>
1970
1971         * testsuite/27_io/filesystem/operations/last_write_time.cc: Fix
1972         test failures on targets with 32-bit time_t.
1973
1974         * include/bits/erase_if.h: Define __cpp_lib_erase_if.
1975         * include/std/deque: Likewise.
1976         * include/std/forward_list: Likewise.
1977         * include/std/list: Likewise.
1978         * include/std/string: Likewise.
1979         * include/std/vector: Likewise.
1980         * include/std/version: Likewise.
1981         * testsuite/21_strings/basic_string/erasure.cc: Test macro.
1982         * testsuite/23_containers/deque/erasure.cc: Likewise.
1983         * testsuite/23_containers/forward_list/erasure.cc: Likewise.
1984         * testsuite/23_containers/list/erasure.cc: Likewise.
1985         * testsuite/23_containers/map/erasure.cc: Likewise.
1986         * testsuite/23_containers/set/erasure.cc: Likewise.
1987         * testsuite/23_containers/unordered_map/erasure.cc: Likewise.
1988         * testsuite/23_containers/unordered_set/erasure.cc: Likewise.
1989         * testsuite/23_containers/vector/erasure.cc: Likewise.
1990
1991         * include/experimental/internet [AI_NUMERICSERV]
1992         (resolver_base::numeric_service): Define conditionally.
1993         * testsuite/experimental/net/internet/resolver/base.cc: Test it
1994         conditionally.
1995         * testsuite/experimental/net/internet/resolver/ops/lookup.cc:
1996         Likewise.
1997
1998 2019-01-10  Ville Voutilainen  <ville.voutilainen@gmail.com>
1999             Jonathan Wakely  <jwakely@redhat.com>
2000
2001         Implement LWG 2221
2002         * config/abi/pre/gnu.ver (GLIBCXX_3.4): Tighten patterns.
2003         (GLIBCXX_3.4.26): Add new exports.
2004         * include/Makefile.am: Add ostream-inst.cc. Move string-inst.cc to
2005         correct list of sources.
2006         * include/Makefile.in: Regenerate.
2007         * include/std/ostream (operator<<(nullptr_t)): New member function.
2008         * src/c++17/ostream-inst.cc: New file.
2009         * testsuite/27_io/basic_ostream/inserters_other/char/lwg2221.cc: New
2010         test.
2011
2012 2019-01-10  Jonathan Wakely  <jwakely@redhat.com>
2013
2014         * testsuite/util/testsuite_fs.h (nonexistent_path): Include name
2015         of the source file containing the caller.
2016         * testsuite/27_io/filesystem/iterators/directory_iterator.cc: Remove
2017         directories created by test.
2018         * testsuite/27_io/filesystem/iterators/recursive_directory_iterator.cc:
2019         Likewise.
2020         * testsuite/experimental/filesystem/iterators/directory_iterator.cc:
2021         Likewise.
2022         * testsuite/experimental/filesystem/iterators/
2023         recursive_directory_iterator.cc: Likewise.
2024
2025 2019-01-10  Jakub Jelinek  <jakub@redhat.com>
2026
2027         PR tree-optimization/88775
2028         * include/bits/stl_function.h (greater<_Tp*>::operator(),
2029         less<_Tp*>::operator(), greater_equal<_Tp*>::operator(),
2030         less_equal<_Tp*>::operator()): Use __builtin_is_constant_evaluated
2031         instead of __builtin_constant_p if available.  Don't bother with
2032         the pointer comparison in C++11 and earlier.
2033
2034 2019-01-09  Sandra Loosemore  <sandra@codesourcery.com>
2035
2036         PR other/16615
2037
2038         * include/ext/bitmap_allocator.h: Mechanically replace "can not"
2039         with "cannot".
2040
2041 2019-01-09  Jonathan Wakely  <jwakely@redhat.com>
2042
2043         * testsuite/libstdc++-prettyprinters/cxx17.cc: Fix expected output
2044         for filesystem::path. Give variables more distinctive names.
2045
2046         * include/std/optional (_Optional_payload_base::_M_copy_assign): New
2047         member function to perform non-trivial assignment.
2048         (_Optional_payload_base::_M_move_assign): Likewise.
2049         (_Optional_payload<T, true, false, true>::operator=)
2050         (_Optional_payload<T, true, true, false>::operator=)
2051         (_Optional_payload<T, true, false, false>::operator=): Call
2052         _M_copy_assign and/or _M_move_assign to do non-trivial assignments.
2053
2054         PR libstdc++/88204
2055         * testsuite/26_numerics/complex/operators/more_constexpr.cc: Do not
2056         test std::complex<long double> if long double format is IBM128.
2057         * testsuite/26_numerics/complex/requirements/more_constexpr.cc:
2058         Likewise.
2059
2060 2019-01-08  Jonathan Wakely  <jwakely@redhat.com>
2061
2062         * testsuite/libstdc++-prettyprinters/compat.cc: Test printer support
2063         for old std::unique_ptr layout.
2064         * testsuite/libstdc++-prettyprinters/cxx17.cc: Fix std::variant test
2065         to become valueless. Add filesystem::path tests.
2066
2067         PR libstdc++/87855
2068         * include/std/optional (_Optional_payload_base): New class template
2069         for common code hoisted from _Optional_payload specializations. Use
2070         a template for the union, to allow a partial specialization for
2071         types with non-trivial destructors. Add constructors for in-place
2072         initialization to the union.
2073         (_Optional_payload(bool, const _Optional_payload&)): Use _M_construct
2074         to perform non-trivial copy construction, instead of relying on
2075         non-standard copy elision in a delegating constructor.
2076         (_Optional_payload(bool, _Optional_payload&&)): Likewise for
2077         non-trivial move construction.
2078         (_Optional_payload): Derive from _Optional_payload_base and use it
2079         for everything except the non-trivial assignment operators, which are
2080         defined as needed.
2081         (_Optional_payload<false, C, M>): Derive from the specialization
2082         _Optional_payload<true, false, false> and add a destructor.
2083         (_Optional_base_impl::_M_destruct, _Optional_base_impl::_M_reset):
2084         Forward to corresponding members of _Optional_payload.
2085         (_Optional_base_impl::_M_is_engaged, _Optional_base_impl::_M_get):
2086         Hoist common members from _Optional_base.
2087         (_Optional_base): Make all members and base class public.
2088         (_Optional_base::_M_get, _Optional_base::_M_is_engaged): Move to
2089         _Optional_base_impl.
2090         * python/libstdcxx/v6/printers.py (StdExpOptionalPrinter): Add
2091         support for new std::optional layout.
2092         * testsuite/libstdc++-prettyprinters/compat.cc: New test.
2093
2094         PR libstdc++/88066
2095         * include/bits/locale_conv.h: Use <> for includes not "".
2096         * include/ext/random: Likewise.
2097         * include/ext/vstring.h: Likewise.
2098
2099 2019-01-08  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
2100
2101         * config/abi/pre/gnu.ver (GLIBCXX_3.4): Tighten existing patterns.
2102         (GLIBCXX_3.4.21): Likewise.
2103
2104 2019-01-08  Jonathan Wakely  <jwakely@redhat.com>
2105
2106         PR libstdc++/88749
2107         * src/filesystem/ops.cc (last_write_time): Fix preprocessor condition
2108         to match the one that controls whether utimbuf and utime are declared.
2109
2110 2019-01-07  Jonathan Wakely  <jwakely@redhat.com>
2111
2112         PR libstdc++/87787
2113         * include/bits/char_traits.h (char_traits::move): Do not pass null
2114         pointers to memmove.
2115         * include/bits/locale_facets.h
2116         (ctype<char>::widen(const char*, const char*, char*)): Do not
2117         pass null pointers to memcpy.
2118         (ctype<char>::narrow(const char*, const char*, char, char*)):
2119         Likewise.
2120         (ctype<char>::do_widen(const char*, const char*, char*)):
2121         Likewise.
2122         (ctype<char>::do_narrow(const char*, const char*, char, char*)):
2123         Likewise.
2124
2125         * doc/xml/manual/spine.xml: Update copyright years.
2126         * doc/xml/manual/status_cxx2017.xml: Adjust note about -lstdc++fs.
2127         * doc/xml/manual/using.xml: Remove requirement to link with -lstdc++fs
2128         for C++17 filesystem library.
2129         * doc/html/*: Regenerate.
2130
2131         * acinclude.m4 (GLIBCXX_CHECK_FILESYSTEM_DEPS): Check for truncate.
2132         * config.h.in: Regenerate.
2133         * config/abi/pre/gnu.ver: Order patterns for filesystem operations
2134         alphabetically and add missing entries for copy_symlink,
2135         hard_link_count, rename, and resize_file.
2136         * configure: Regenerate.
2137         * src/c++17/fs_ops.cc (resize_file): Remove #if so posix::truncate is
2138         used unconditionally.
2139         * src/filesystem/ops-common.h (__gnu_posix::truncate)
2140         [!_GLIBCXX_HAVE_TRUNCATE]: Provide fallback definition that only
2141         supports truncating to zero length.
2142         * testsuite/27_io/filesystem/operations/all.cc: New test.
2143         * testsuite/27_io/filesystem/operations/resize_file.cc: New test.
2144
2145 2019-01-06  Jonathan Wakely  <jwakely@redhat.com>
2146
2147         PR libstdc++/86756
2148         * acinclude.m4 (GLIBCXX_CHECK_FILESYSTEM_DEPS): Check for utime and
2149         lstat and define _GLIBCXX_USE_UTIME and _GLIBCXX_USE_LSTAT.
2150         * config.h.in: Regenerate.
2151         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Export symbols for
2152         remaining std::filesystem types and functions.
2153         * configure: Regenerate.
2154         * src/c++17/Makefile.am: Add C++17 filesystem sources.
2155         * src/c++17/Makefile.in: Regenerate.
2156         * src/c++17/cow-fs_dir.cc: Move src/filesystem/cow-std-dir.cc to
2157         here, and change name of included file.
2158         * src/c++17/cow-fs_ops.cc: Move src/filesystem/cow-std-ops.cc to
2159         here, and change name of included file.
2160         * src/c++17/fs_dir.cc: Move src/filesystem/std-dir.cc to here. Change
2161         path to dir-common.h.
2162         * src/c++17/fs_ops.cc: Move src/filesystem/std-ops.cc to here. Change
2163         path to ops-common.h. Disable -Wunused-parameter warnings.
2164         (internal_file_clock): Define unconditionally.
2165         [!_GLIBCXX_HAVE_SYS_STAT_H] (internal_file_clock::from_stat): Do not
2166         define.
2167         (do_copy_file, do_space): Move definitions to ops.common.h.
2168         (copy, file_size, hard_link_count, last_write_time, space): Only
2169         perform operation when _GLIBCXX_HAVE_SYS_STAT_H is defined, otherwise
2170         report an error.
2171         (last_write_time, read_symlink): Remove unused attributes from
2172         parameters.
2173         * src/filesystem/Makefile.am: Remove C++17 filesystem sources.
2174         * src/filesystem/Makefile.in: Regenerate.
2175         * src/filesystem/cow-std-dir.cc: Move to src/c++17/cow-fs_dir.cc.
2176         * src/filesystem/cow-std-ops.cc: Move to src/c++17/cow-fs_ops.cc.
2177         * src/filesystem/std-dir.cc: Move to src/c++17/fs_dir.cc.
2178         * src/filesystem/std-ops.cc: Move to src/c++17/fs_ops.cc.
2179         * src/filesystem/dir-common.h [!_GLIBCXX_HAVE_DIRENT_H]: Define
2180         dummy types and functions instead of using #error.
2181         * src/filesystem/dir.cc [!_GLIBCXX_HAVE_DIRENT_H]: Use #error.
2182         * src/filesystem/ops-common.h [!_GLIBCXX_USE_LSTAT] (lstat): Define
2183         in terms of stat.
2184         [!_GLIBCXX_HAVE_UNISTD_H]: Define dummy types and functions.
2185         (do_copy_file, do_space): Move definitions here from std-ops.cc.
2186         * src/filesystem/ops.cc: Adjust calls to do_copy_file and do_space
2187         to account for new namespace.
2188         * testsuite/27_io/filesystem/directory_entry/86597.cc: Remove
2189         -lstdc++fs from dg-options.
2190         * testsuite/27_io/filesystem/directory_entry/lwg3171.cc: Likewise.
2191         * testsuite/27_io/filesystem/file_status/1.cc: Likewise.
2192         * testsuite/27_io/filesystem/filesystem_error/cons.cc: Likewise.
2193         * testsuite/27_io/filesystem/filesystem_error/copy.cc: Likewise.
2194         * testsuite/27_io/filesystem/iterators/directory_iterator.cc:
2195         Likewise.
2196         * testsuite/27_io/filesystem/iterators/pop.cc: Likewise.
2197         * testsuite/27_io/filesystem/iterators/recursive_directory_iterator.cc:
2198         Likewise.
2199         * testsuite/27_io/filesystem/operations/absolute.cc: Likewise.
2200         * testsuite/27_io/filesystem/operations/canonical.cc: Likewise.
2201         * testsuite/27_io/filesystem/operations/copy.cc: Likewise.
2202         * testsuite/27_io/filesystem/operations/copy_file.cc: Likewise.
2203         * testsuite/27_io/filesystem/operations/create_directories.cc:
2204         Likewise.
2205         * testsuite/27_io/filesystem/operations/create_directory.cc: Likewise.
2206         * testsuite/27_io/filesystem/operations/create_symlink.cc: Likewise.
2207         * testsuite/27_io/filesystem/operations/current_path.cc: Likewise.
2208         * testsuite/27_io/filesystem/operations/equivalent.cc: Likewise.
2209         * testsuite/27_io/filesystem/operations/exists.cc: Likewise.
2210         * testsuite/27_io/filesystem/operations/file_size.cc: Likewise.
2211         * testsuite/27_io/filesystem/operations/is_empty.cc: Likewise.
2212         * testsuite/27_io/filesystem/operations/last_write_time.cc: Likewise.
2213         * testsuite/27_io/filesystem/operations/permissions.cc: Likewise.
2214         * testsuite/27_io/filesystem/operations/proximate.cc: Likewise.
2215         * testsuite/27_io/filesystem/operations/read_symlink.cc: Likewise.
2216         * testsuite/27_io/filesystem/operations/relative.cc: Likewise.
2217         * testsuite/27_io/filesystem/operations/remove.cc: Likewise.
2218         * testsuite/27_io/filesystem/operations/remove_all.cc: Likewise.
2219         * testsuite/27_io/filesystem/operations/space.cc: Likewise.
2220         * testsuite/27_io/filesystem/operations/status.cc: Likewise.
2221         * testsuite/27_io/filesystem/operations/symlink_status.cc: Likewise.
2222         * testsuite/27_io/filesystem/operations/temp_directory_path.cc:
2223         Likewise.
2224         * testsuite/27_io/filesystem/operations/weakly_canonical.cc: Likewise.
2225
2226
2227         PR libstdc++/86756
2228         * config/abi/pre/gnu.ver (GLIBCXX_3.4): Make various patterns for
2229         typeinfo and vtables less greedy.
2230         (GLIBCXX_3.4.26): Export symbols for std::filesystem::path.
2231         * src/c++17/Makefile.am: Add fs_path.cc and cow-fs_path.cc.
2232         * src/c++17/Makefile.in: Regenerate.
2233         * src/c++17/cow-fs_path.cc: Move src/filesystem/cow-std-path.cc to
2234         here, and change name of included file.
2235         * src/c++17/fs_path.cc: Move src/filesystem/std-path.cc to here.
2236         * src/filesystem/Makefile.am: Remove std-path.cc and cow-std-path.cc
2237         from sources.
2238         * src/filesystem/Makefile.in: Regenerate.
2239         * src/filesystem/cow-std-path.cc: Move to src/c++17/cow-fs_path.cc.
2240         * src/filesystem/std-path.cc: Move to src/c++17/fs_path.cc.
2241         * testsuite/27_io/filesystem/path/append/path.cc: Remove -lstdc++fs
2242         from dg-options and remove dg-require-filesystem-ts.
2243         * testsuite/27_io/filesystem/path/append/source.cc: Likewise.
2244         * testsuite/27_io/filesystem/path/assign/assign.cc: Likewise.
2245         * testsuite/27_io/filesystem/path/assign/copy.cc: Likewise.
2246         * testsuite/27_io/filesystem/path/compare/compare.cc: Likewise.
2247         * testsuite/27_io/filesystem/path/compare/lwg2936.cc: Likewise.
2248         * testsuite/27_io/filesystem/path/compare/path.cc: Likewise.
2249         * testsuite/27_io/filesystem/path/compare/strings.cc: Likewise.
2250         * testsuite/27_io/filesystem/path/concat/path.cc: Likewise.
2251         * testsuite/27_io/filesystem/path/concat/strings.cc: Likewise.
2252         * testsuite/27_io/filesystem/path/construct/80762.cc: Likewise.
2253         * testsuite/27_io/filesystem/path/construct/copy.cc: Likewise.
2254         * testsuite/27_io/filesystem/path/construct/default.cc: Likewise.
2255         * testsuite/27_io/filesystem/path/construct/format.cc: Likewise.
2256         * testsuite/27_io/filesystem/path/construct/locale.cc: Likewise.
2257         * testsuite/27_io/filesystem/path/construct/range.cc: Likewise.
2258         * testsuite/27_io/filesystem/path/construct/string_view.cc: Likewise.
2259         * testsuite/27_io/filesystem/path/decompose/extension.cc: Likewise.
2260         * testsuite/27_io/filesystem/path/decompose/filename.cc: Likewise.
2261         * testsuite/27_io/filesystem/path/decompose/parent_path.cc: Likewise.
2262         * testsuite/27_io/filesystem/path/decompose/relative_path.cc: Likewise.
2263         * testsuite/27_io/filesystem/path/decompose/root_directory.cc:
2264         Likewise.
2265         * testsuite/27_io/filesystem/path/decompose/root_name.cc: Likewise.
2266         * testsuite/27_io/filesystem/path/decompose/root_path.cc: Likewise.
2267         * testsuite/27_io/filesystem/path/decompose/stem.cc: Likewise.
2268         * testsuite/27_io/filesystem/path/generation/normal.cc: Likewise.
2269         * testsuite/27_io/filesystem/path/generation/normal2.cc: Likewise.
2270         * testsuite/27_io/filesystem/path/generation/proximate.cc: Likewise.
2271         * testsuite/27_io/filesystem/path/generation/relative.cc: Likewise.
2272         * testsuite/27_io/filesystem/path/generic/generic_string.cc: Likewise.
2273         * testsuite/27_io/filesystem/path/itr/components.cc: Likewise.
2274         * testsuite/27_io/filesystem/path/itr/traversal.cc: Likewise.
2275         * testsuite/27_io/filesystem/path/modifiers/clear.cc: Likewise.
2276         * testsuite/27_io/filesystem/path/modifiers/make_preferred.cc:
2277         Likewise.
2278         * testsuite/27_io/filesystem/path/modifiers/remove_filename.cc:
2279         Likewise.
2280         * testsuite/27_io/filesystem/path/modifiers/replace_extension.cc:
2281         Likewise.
2282         * testsuite/27_io/filesystem/path/modifiers/replace_filename.cc:
2283         Likewise.
2284         * testsuite/27_io/filesystem/path/modifiers/swap.cc: Likewise.
2285         * testsuite/27_io/filesystem/path/native/string.cc: Likewise.
2286         * testsuite/27_io/filesystem/path/nonmember/append.cc: Likewise.
2287         * testsuite/27_io/filesystem/path/nonmember/hash_value.cc: Likewise.
2288         * testsuite/27_io/filesystem/path/query/empty.cc: Likewise.
2289         * testsuite/27_io/filesystem/path/query/has_extension.cc: Likewise.
2290         * testsuite/27_io/filesystem/path/query/has_filename.cc: Likewise.
2291         * testsuite/27_io/filesystem/path/query/has_parent_path.cc: Likewise.
2292         * testsuite/27_io/filesystem/path/query/has_relative_path.cc: Likewise.
2293         * testsuite/27_io/filesystem/path/query/has_root_directory.cc:
2294         Likewise.
2295         * testsuite/27_io/filesystem/path/query/has_root_name.cc: Likewise.
2296         * testsuite/27_io/filesystem/path/query/has_root_path.cc: Likewise.
2297         * testsuite/27_io/filesystem/path/query/has_stem.cc: Likewise.
2298         * testsuite/27_io/filesystem/path/query/is_absolute.cc: Likewise.
2299         * testsuite/27_io/filesystem/path/query/is_relative.cc: Likewise.
2300
2301         PR libstdc++/87431
2302         * include/std/variant (_Variant_storage<true, _Types...>::_M_valid):
2303         Check is_trivially_copyable instead of is_scalar.
2304         (variant::emplace<N, Args>(Args&&...)): If construction of the new
2305         contained value can throw and its type is trivially copyable then
2306         construct into a temporary variant and move from it, to provide the
2307         strong exception safety guarantee.
2308         (variant::emplace<N, U, Args>(initializer_list<U>, Args&&...)):
2309         Likewise.
2310         * testsuite/20_util/variant/87431.cc: New test.
2311         * testsuite/20_util/variant/run.cc: Adjust test so that throwing
2312         conversion causes valueless state.
2313
2314         PR libstdc++/88607
2315         * testsuite/17_intro/headers/c++1998/charset.cc: New test.
2316         * testsuite/17_intro/headers/c++2011/charset.cc: New test.
2317         * testsuite/17_intro/headers/c++2014/charset.cc: New test.
2318         * testsuite/17_intro/headers/c++2017/charset.cc: New test.
2319         * testsuite/17_intro/headers/c++2020/charset.cc: New test.
2320
2321 2019-01-05  Jonathan Wakely  <jwakely@redhat.com>
2322
2323         * include/bits/fs_fwd.h (__file_clock): Define new clock.
2324         (file_time_type): Redefine in terms of __file_clock.
2325         * src/filesystem/ops-common.h (file_time): Add FIXME comment about
2326         overflow.
2327         * src/filesystem/std-ops.cc (is_set(perm_options, perm_options)): Give
2328         internal linkage.
2329         (internal_file_lock): New helper type for accessing __file_clock.
2330         (do_copy_file): Use internal_file_lock to convert system time to
2331         file_time_type.
2332         (last_write_time(const path&, error_code&)): Likewise.
2333         (last_write_time(const path&, file_time_type, error_code&)): Likewise.
2334
2335 2019-01-04  Jonathan Wakely  <jwakely@redhat.com>
2336
2337         * config/abi/pre/gnu.ver (GLIBCXX_3.4.21): Make patterns less greedy
2338         for const member functions of std::basic_string.
2339         (GLIBCXX_3.4.26): Export member functions of std::basic_string added
2340         in C++17.
2341         * include/bits/basic_string.h (basic_string(__sv_wrapper, const A&)):
2342         Make non-standard constructor private.
2343         [!_GLIBCXX_USE_CXX11_ABI] (basic_string(__sv_wrapper, const A&)):
2344         Likewise.
2345         * include/bits/basic_string.tcc (std::string, std::wstring): Declare
2346         explicit instantiations for C++17 as well as earlier dialects.
2347         * src/c++17/Makefile.am: Add new source files.
2348         * src/c++17/Makefile.in: Regenerate.
2349         * src/c++17/cow-string-inst.cc: New file defining explicit
2350         instantiations for basic_string member functions added in C++17.
2351         * src/c++17/string-inst.cc: Likewise.
2352
2353         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Export allocator-extended
2354         copy/move constructors for old std::basic_string.
2355         * include/bits/basic_string.h [!_GLIBCXX_USE_CXX11_ABI]
2356         (basic_string::reference, basic_string::const_reference): Define
2357         as plain references for C++11 and later.
2358         (basic_string::basic_string()): Put constructor body outside
2359         preprocessor conditional groups.
2360         (basic_string::basic_string(basic_string&&)): Move _Alloc_hider
2361         instead of copying it.
2362         (basic_string::basic_string(const basic_string&, const _Alloc&)):
2363         Define.
2364         (basic_string::basic_string(basic_string&&, const _Alloc&)):
2365         Define.
2366         * include/bits/fs_path.h [!_GLIBCXX_USE_CXX11_ABI]: Remove special
2367         cases for old basic_string.
2368         * testsuite/21_strings/basic_string/cons/char/8.cc: Test
2369         allocator-extended constructors unconditionally. Add extra members to
2370         allocator type when using old string ABI.
2371         * testsuite/21_strings/basic_string/allocator/71964.cc: Enable test
2372         for old string ABI.
2373         * testsuite/21_strings/basic_string/cons/wchar_t/8.cc: Likewise.
2374
2375         * testsuite/23_containers/list/61347.cc: Avoid spurious failure when
2376         -fno-inline added to test flags.
2377
2378         * testsuite/21_strings/basic_string/requirements/
2379         explicit_instantiation/debug.cc: Remove XFAIL for old ABI.
2380
2381         * testsuite/27_io/filesystem/filesystem_error/copy.cc: Fix static
2382         assertion failures with old std::string ABI.
2383
2384         * include/bits/fs_path.h (path::_List::erase): Replace both overloads
2385         with ...
2386         (path::pop_back(), path::_M_erase_from(const_iterator)): New member
2387         functions that will only erase elements at the end.
2388         * src/filesystem/std-path.cc (path::_List::_Impl::pop_back()): Define.
2389         (path::_List::_Impl::_M_erase_from(const_iterator)): Define.
2390         (path::_List::operator=(const _List&)): Use _M_erase_from(p) instead
2391         of erase(p, end()).
2392         (path::_List::pop_back()): Define.
2393         (path::_List::_M_erase_from(const_iterator)): Define.
2394         (path::operator/=(const path&)): Use pop_back to remove last component
2395         and _M_erase_from to remove multiple components.
2396         (path::_M_append(basic_string_view<value_type>)): Likewise.
2397         (path::operator+=(const path&)): Likewise.
2398         (path::_M_concat(basic_string_view<value_type>)): Likewise.
2399         (path::remove_filename()): Likewise.
2400         (path::lexically_normal()): Use _List::_Impl iterators instead of
2401         path::iterator. Use pop_back to remove components from the end. Clear
2402         trailing filename, instead of using erase(const_iterator) to remove
2403         a non-final component.
2404         * testsuite/27_io/filesystem/path/generation/normal.cc: Test
2405         additional cases.
2406         * testsuite/27_io/filesystem/path/generation/normal2.cc: New test.
2407
2408         * src/filesystem/std-path.cc (path::operator+=(const path&)): Fix
2409         incorrect treatment of empty filename after trailing slash.
2410         * testsuite/27_io/filesystem/path/concat/path.cc: Test problem case.
2411
2412         * testsuite/21_strings/basic_string/modifiers/assign/char/
2413         move_assign_optim.cc: Avoid spurious failure when -fno-inline added
2414         to test flags.
2415         * testsuite/21_strings/basic_string/modifiers/assign/wchar_t/
2416         move_assign_optim.cc: Likewise.
2417
2418 2019-01-03  Jonathan Wakely  <jwakely@redhat.com>
2419             Jakub Jelinek  <jakub@redhat.com>
2420
2421         PR libstdc++/88607
2422         * include/experimental/memory: Replace UTF-8 quote characters.
2423         * include/std/future: Replace UTF-8 "em dash" characters.
2424
2425 2019-01-03  Jonathan Wakely  <jwakely@redhat.com>
2426
2427         PR libstdc++/88607
2428         * include/bits/forward_list.h: Replace UTF-8 "ligature fi" character.
2429         * include/debug/forward_list: Likewise.
2430         * include/experimental/bits/shared_ptr.h: Remove UTF-8 "section sign"
2431         character.
2432         * include/experimental/chrono: Likewise.
2433         * include/experimental/functional: Likewise.
2434         * include/experimental/ratio: Likewise.
2435         * include/experimental/system_error: Likewise.
2436         * include/experimental/tuple: Likewise.
2437         * include/experimental/type_traits: Likewise.
2438         * include/parallel/workstealing.h: Replace UTF-8 "en dash" character.
2439         * include/parallel/multiseq_selection.h: Likewise.
2440
2441         PR libstdc++/88681
2442         * config/abi/pre/gnu.ver: Add missing exports.
2443         * testsuite/22_locale/collate_byname/88681.cc: New test.
2444         * testsuite/22_locale/time_get/get/char/88681.cc: New test.
2445         * testsuite/22_locale/time_get/get/wchar_t/88681.cc: New test.
2446
2447 2019-01-02  Jonathan Wakely  <jwakely@redhat.com>
2448
2449         * testsuite/23_containers/map/cons/deduction.cc: Test deduction from
2450         initializer_list<value_type> and from input iterator ranges.
2451         * testsuite/23_containers/multimap/cons/deduction.cc: Likewise.
2452
2453         * testsuite/experimental/string_view/element_access/char/empty.cc:
2454         Fix year range in copyright header.
2455
2456 2019-01-02  Joel Brobecker  <brobecker@adacore.com>
2457
2458         * testsuite/21_strings/basic_string_view/element_access/char/empty.cc:
2459         Fix year range in copyright header.
2460
2461 2019-01-01  Jakub Jelinek  <jakub@redhat.com>
2462
2463         Update copyright years.
2464 \f
2465 Copyright (C) 2019 Free Software Foundation, Inc.
2466
2467 Copying and distribution of this file, with or without modification,
2468 are permitted in any medium without royalty provided the copyright
2469 notice and this notice are preserved.