libstdc++-v3/ChangeLog

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