libstdc++-v3/ChangeLog

   1 2019-01-29  Jonathan Wakely  <jwakely@redhat.com>
   2
   3         * testsuite/20_util/reference_wrapper/result_type.cc: Disable for
   4         C++2a.
   5         * testsuite/20_util/reference_wrapper/typedefs-2.cc: Likewise.
   6         * testsuite/20_util/reference_wrapper/typedefs-3.cc: Likewise.
   7         * testsuite/20_util/reference_wrapper/typedefs.cc: Likewise.
   8         * testsuite/30_threads/async/54297.cc: Suppress nodiscard warning.
   9         * testsuite/ext/array_allocator/26875.cc: Likewise.
  10         * testsuite/ext/pool_allocator/allocate_chunk.cc: Likewise.
  11         * testsuite/util/replacement_memory_operators.h: Likewise.
  12         * testsuite/util/testsuite_allocator.h: Likewise.
  13
  14         * include/std/memory_resource (__pool_resource::_M_unpooled): Use
  15         normal mode vector, even for debug mode.
  16         * include/std/vector [_GLIBCXX_DEBUG] (_GLIBCXX_STD_C::pmr::vector):
  17         Define alias template for normal mode vector.
  18
  19 2019-01-28  Jonathan Wakely  <jwakely@redhat.com>
  20
  21         PR libstdc++/68737
  22         * config/locale/generic/c_locale.h (__convert_from_v)
  23         [_GLIBCXX_USE_C99_STDIO]: Also check _GLIBCXX_HAVE_BROKEN_VSNPRINTF.
  24         * config/os/hpux/os_defines.h: Define _GLIBCXX_HAVE_BROKEN_VSNPRINTF.
  25         * include/bits/locale_facets.tcc (num_put::_M_insert_float)
  26         [_GLIBCXX_USE_C99_STDIO]: Also check _GLIBCXX_HAVE_BROKEN_VSNPRINTF.
  27
  28 2019-01-24  Jonathan Wakely  <jwakely@redhat.com>
  29
  30         PR libstdc++/88840
  31         * include/bits/stl_vector.h (vector::__use_relocate): Replace static
  32         data member with static member function _S_use_relocate().
  33         * include/bits/vector.tcc (vector::reserve, vector::_M_realloc_insert)
  34         (vector::_M_default_append): Use _S_use_relocate() instead of
  35         __use_relocate.
  36
  37         * testsuite/27_io/filesystem/path/compare/strings.cc: Only compare
  38         sign of results.
  39
  40 2019-01-22  Jonathan Wakely  <jwakely@redhat.com>
  41
  42         PR libstdc++/88740
  43         * testsuite/util/testsuite_hooks.h [stderr] (VERIFY): Use fprintf to
  44         write to stderr instead of using printf.
  45
  46 2019-01-21  Jakub Jelinek  <jakub@redhat.com>
  47
  48         PR libstdc++/86590
  49         * include/bits/char_traits.h (__constant_string_p,
  50         __constant_char_array_p): Use __builtin_is_constant_evaluated if
  51         available.
  52
  53 2019-01-20  Ulrich Drepper  <drepper@redhat.com>
  54
  55         Implement C++20 P0600r1.
  56         * include/backward/hash_map: Add nodiscard attribute to empty.
  57         * include/backward/hash_set: Likewise.
  58         * backward/hashtable.h: Likewise.
  59         * include/bits/basic_string.h: Likewise.
  60         * include/bits/forward_list.h: Likewise.
  61         * include/bits/hashtable.h: Likewise.
  62         * include/bits/regex.h: Likewise.
  63         * include/bits/stl_deque.h: Likewise.
  64         * include/bits/stl_list.h: Likewise.
  65         * include/bits/stl_map.h: Likewise.
  66         * include/bits/stl_multimap.h: Likewise.
  67         * include/bits/stl_multiset.h: Likewise.
  68         * include/bits/stl_queue.h: Likewise.
  69         * include/bits/stl_set.h: Likewise.
  70         * include/bits/stl_stack.h: Likewise.
  71         * include/bits/stl_tree.h: Likewise.
  72         * include/bits/stl_vector.h: Likewise.
  73         * include/bits/unordered_map.h: Likewise.
  74         * include/bits/unordered_set.h: Likewise.
  75         * include/debug/array: Likewise.
  76         * include/experimental/any: Likewise.
  77         * include/experimental/bits/fs_path.h: Likewise.
  78         * include/experimental/internet: Likewise.
  79         * include/experimental/string_view: Likewise.
  80         * include/ext/pb_ds/detail/bin_search_tree_/info_fn_imps.hpp:
  81         Likewise.
  82         * include/ext/pb_ds/detail/binary_heap_/binary_heap_.hpp:
  83         Likewise.
  84         * include/ext/pb_ds/detail/binary_heap_/info_fn_imps.hpp:
  85         Likewise.
  86         * include/ext/pb_ds/detail/cc_hash_table_map_/cc_ht_map_.hpp:
  87         Likewise.
  88         * include/ext/pb_ds/detail/cc_hash_table_map_/info_fn_imps.hpp:
  89         Likewise.
  90         * include/ext/pb_ds/detail/cc_hash_table_map_/size_fn_imps.hpp:
  91         Likewise.
  92         * include/ext/pb_ds/detail/gp_hash_table_map_/gp_ht_map_.hpp:
  93         Likewise.
  94         * include/ext/pb_ds/detail/gp_hash_table_map_/info_fn_imps.hpp:
  95         Likewise.
  96         * include/ext/pb_ds/detail/left_child_next_sibling_heap_/
  97         info_fn_imps.hpp: Likewise.
  98         * include/ext/pb_ds/detail/left_child_next_sibling_heap_/
  99         left_child_next_sibling_heap_.hpp: Likewise.
 100         * include/ext/pb_ds/detail/list_update_map_/info_fn_imps.hpp:
 101         Likewise.
 102         * include/ext/pb_ds/detail/list_update_map_/lu_map_.hpp:
 103         Likewise.
 104         * include/ext/pb_ds/detail/ov_tree_map_/info_fn_imps.hpp:
 105         Likewise.
 106         * include/ext/pb_ds/detail/ov_tree_map_/ov_tree_map_.hp:
 107         Likewise.
 108         * include/ext/pb_ds/detail/pat_trie_/info_fn_imps.hpp:
 109         Likewise.
 110         * include/ext/pb_ds/detail/pat_trie_/pat_trie_.hpp:
 111         Likewise.
 112         * include/ext/pb_ds/detail/rc_binomial_heap_/rc.hpp:
 113         Likewise.
 114         * include/ext/pb_ds/detail/tree_trace_base.hpp: Likewise.
 115         * include/ext/pb_ds/trie_policy.hpp: Likewise.
 116         * include/ext/rope: Likewise.
 117         * include/ext/slist: Likewise.
 118         * include/ext/vstring.h: Likewise.
 119         * include/profile/array: Likewise.
 120         * include/std/array: Likewise.
 121         * include/tr1/array: Likewise.
 122         * include/tr1/hashtable.h: Likewise.
 123         * include/tr1/regex: Likewise.
 124         * include/tr2/dynamic_bitset: Likewise.
 125         * include/bits/alloc_traits.h: Add nodiscard attribute to
 126         allocate.
 127         * include/experimental/memory_resource: Likewise.
 128         * include/ext/alloc_traits.h: Likewise.
 129         * include/ext/array_allocator.h: Likewise.
 130         * include/ext/bitmap_allocator.h: Likewise.
 131         * include/ext/debug_allocator.h: Likewise.
 132         * include/ext/extptr_allocator.h: Likewise.
 133         * include/ext/mt_allocator.h: Likewise.
 134         * include/ext/new_allocator.h: Likewise.
 135         * include/ext/pool_allocator.h: Likewise.
 136         * include/ext/throw_allocator.h: Likewise.
 137         * include/std/scoped_allocator: Likewise.
 138         * libsupc++/eh_alloc.cc: Likewise.
 139         * include/std/future: Add nodiscard attribute to async.
 140         * libsupc++/new: Add nodiscard attribute to new.
 141
 142 2019-01-18  Jonathan Wakely  <jwakely@redhat.com>
 143
 144         PR libstdc++/87514
 145         PR libstdc++/87520
 146         PR libstdc++/88782
 147         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Export new symbol.
 148         * include/bits/shared_ptr.h
 149         (shared_ptr(_Sp_make_shared_tag, const Alloc&, Args&&...))
 150         (allocate_shared): Change to use new tag type.
 151         * include/bits/shared_ptr_base.h (_Sp_make_shared_tag::_S_eq):
 152         Declare new member function.
 153         (_Sp_alloc_shared_tag): Define new type.
 154         (_Sp_counted_ptr_inplace): Declare __shared_count<_Lp> as a friend.
 155         (_Sp_counted_ptr_inplace::_M_get_deleter) [!__cpp_rtti]: Use
 156         _Sp_make_shared_tag::_S_eq to check type_info.
 157         (__shared_count(Ptr, Deleter),__shared_count(Ptr, Deleter, Alloc)):
 158         Constrain to prevent being called with _Sp_alloc_shared_tag.
 159         (__shared_count(_Sp_make_shared_tag, const _Alloc&, Args&&...)):
 160         Replace constructor with ...
 161         (__shared_count(Tp*&, _Sp_alloc_shared_tag<_Alloc>, Args&&...)): Use
 162         reference parameter so address of the new object can be returned to
 163         the caller. Obtain the allocator from the tag type.
 164         (__shared_ptr(_Sp_make_shared_tag, const Alloc&, Args&&...)): Replace
 165         constructor with ...
 166         (__shared_ptr(_Sp_alloc_shared_tag<Alloc>, Args&&...)): Pass _M_ptr
 167         to the __shared_count constructor.
 168         (__allocate_shared): Change to use new tag type.
 169         * src/c++11/shared_ptr.cc (_Sp_make_shared_tag::_S_eq): Define.
 170
 171 2019-01-17  Jonathan Wakely  <jwakely@redhat.com>
 172
 173         * src/c++17/fs_ops.cc
 174         (equivalent(const path&, const path&, error_code&))
 175         [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Use GetFileInformationByHandle to
 176         compare files instead of relying on incomplete info returned by stat.
 177
 178         PR libstdc++/88884
 179         * src/c++17/fs_ops.cc (absolute(const path&, error_code&)): Do nothing
 180         if the path is already absolute.
 181         [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Normalize root-directory.
 182         [!_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Pass error_code to current_path.
 183
 184         PR libstdc++/88881
 185         * src/c++17/fs_ops.cc (canonical(const path&, error_code&))
 186         [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Normalize path, to match behaviour
 187         of filesystem::exists.
 188         (create_directories(const path&, error_code&)): Add assertions.
 189         (status(const path&, error_code&)) [_GLIBCXX_FILESYSTEM_IS_WINDOWS]:
 190         Add workaround for bug in _wstat for paths with trailing slash.
 191         * testsuite/27_io/filesystem/operations/create_directories.cc: Adjust
 192         for expected behaviour on mingw.
 193         * testsuite/experimental/filesystem/operations/create_directories.cc:
 194         Likewise.
 195         * testsuite/27_io/filesystem/operations/temp_directory_path.cc: Use
 196         "TMP" instead of "TMPDIR" and clean environment before each test. Do
 197         not test permissions on mingw targets.
 198
 199 2019-01-16  Jonathan Wakely  <jwakely@redhat.com>
 200
 201         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Add exports for fstream
 202         constructors and open members taking wide strings. Fix patterns for
 203         filesystem::path members to match wstring_view parameters. Add
 204         exports for shared_ptr members used by directory iterators.
 205         * src/c++17/fs_ops.cc (remove(const path&, error_code&)): Clear the
 206         error code parameter if the file doesn't exist.
 207         * src/filesystem/ops.cc (remove(const path&, error_code&)):
 208         Likewise.
 209         * testsuite/27_io/filesystem/operations/canonical.cc: Fix expected
 210         values for mingw targets, where "/" is not an absolute path. Do not
 211         test symlinks on mingw targets.
 212         * testsuite/experimental/filesystem/operations/canonical.cc: Likewise.
 213         * testsuite/27_io/filesystem/operations/copy.cc: Do not test symlinks
 214         on mingw targets.
 215         * testsuite/experimental/filesystem/operations/copy.cc: Likewise.
 216         * testsuite/27_io/filesystem/operations/create_directories.cc: Check
 217         that each component of the path is created.
 218         * testsuite/experimental/filesystem/operations/create_directories.cc:
 219         Likewise.
 220         * testsuite/27_io/filesystem/operations/exists.cc: Do not test
 221         permissions on mingw targets.
 222         * testsuite/experimental/filesystem/operations/exists.cc: Likewise.
 223         * testsuite/27_io/filesystem/operations/is_empty.cc: Likewise.
 224         * testsuite/experimental/filesystem/operations/is_empty.cc: Likewise.
 225         * testsuite/27_io/filesystem/operations/permissions.cc: XFAIL for
 226         mingw targets.
 227         * testsuite/experimental/filesystem/operations/permissions.cc:
 228         Likewise.
 229         * testsuite/27_io/filesystem/operations/remove.cc: Do not test
 230         symlinks or permissions on mingw targets.
 231         * testsuite/experimental/filesystem/operations/remove.cc: Likewise.
 232         * testsuite/27_io/filesystem/operations/remove_all.cc: Do not test
 233         symlinks on mingw targets.
 234         * testsuite/experimental/filesystem/operations/remove_all.cc:
 235         Likewise.
 236         * testsuite/27_io/filesystem/operations/status.cc: Do not test
 237         permissions on mingw targets.
 238         * testsuite/27_io/filesystem/operations/weakly_canonical.cc: Do not
 239         test symlinks on mingw targets.
 240         * testsuite/experimental/filesystem/operations/space.cc: Fix test
 241         for mingw targets.
 242
 243 2019-02-14  Ulrich Drepper  <drepper@redhat.com>
 244
 245         PR libstdc++/88738
 246         Warn about unused comparisons of shared_ptr/unique_ptr
 247         * include/bits/c++config [_GLIBCXX_NODISCARD]: Define.
 248         * include/bits/shared_ptr.h: Use it for operator ==, !=,
 249         <, <=, >, >= for shared_ptr.
 250         * include/bits/unique_ptr.h: Likewise for unique_ptr.
 251
 252 2019-01-15  Jonathan Wakely  <jwakely@redhat.com>
 253
 254         * include/bits/shared_ptr_base.h (__cpp_lib_shared_ptr_arrays): Define
 255         as 201611L, because P0497R0 changes are supported.
 256         * include/std/version (__cpp_lib_shared_ptr_arrays): Likewise.
 257
 258         * include/bits/erase_if.h [__cplusplus > 201703L]
 259         (__cpp_lib_erase_if): Only define for C++2a.
 260         * include/std/iterator [__cplusplus >= 201402L && !_GLIBCXX_DEBUG]
 261         (__cpp_lib_null_iterators): Define.
 262         * include/std/version [__cplusplus >= 201402L && !_GLIBCXX_DEBUG]
 263         (__cpp_lib_null_iterators): Define.
 264         [__cpp_impl_destroying_delete] (__cpp_lib_destroying_delete): Define.
 265
 266         * doc/xml/manual/status_cxx2017.xml: Document P0032R3 and P0307R2
 267         status.
 268         * include/bits/stl_uninitialized.h (__cpp_lib_raw_memory_algorithms):
 269         Define.
 270         * include/std/any (__cpp_lib_any): Define as 201606L, because P0032R3
 271         changes are supported.
 272         * include/std/optional (__cpp_lib_optional): Likewise.
 273         * include/std/variant (__cpp_lib_variant): Likewise.
 274         * include/std/version [!__STRICT_ANSI__]
 275         (__cpp_lib_uncaught_exceptions): Define as long integer.
 276         [__cplusplus >= 201703L] (__cpp_lib_any)
 277         (__cpp_lib_raw_memory_algorithms, __cpp_lib_uncaught_exceptions)
 278         (__cpp_lib_variant): Define for C++17.
 279         [__cplusplus >= 201703L] (__cpp_lib_optional): Update value and define
 280         as long integer.
 281         * libsupc++/exception (__cpp_lib_uncaught_exceptions): Define as long
 282         integer.
 283
 284         * doc/xml/manual/status_cxx2020.xml: Update P1123R0 status.
 285
 286 2019-01-12  Jonathan Wakely  <jwakely@redhat.com>
 287
 288         PR libstdc++/88811
 289         PR libstdc++/83306
 290         * src/filesystem/path.cc: Fix typo. If first path is empty, show []
 291         before second path.
 292         * testsuite/experimental/filesystem/filesystem_error/cons.cc: New
 293         test.
 294
 295 2019-01-11  Jonathan Wakely  <jwakely@redhat.com>
 296
 297         * doc/xml/manual/intro.xml: Include new section.
 298         * doc/xml/manual/status_cxx2017.xml: Document more
 299         implementation-defined properties of the library.
 300         * doc/xml/manual/status_cxx2020.xml: Document C++2a status.
 301         * doc/html/*: Regenerate.
 302
 303         * include/bits/refwrap.h [__cplusplus > 201703L]
 304         (_Refwrap_base_arg1, _Refwrap_base_arg2, _Reference_wrapper_base)
 305         (_Reference_wrapper_base_memfun): Do not define for C++2a.
 306         (reference_wrapper): Do not derive from _Reference_wrapper_base_memfun
 307         for C++2a.
 308         (reference_wrapper::operator()): Add static assertion.
 309         * testsuite/20_util/reference_wrapper/incomplete.cc: New test.
 310
 311         * include/std/chrono (duration_values::zero(), duration_values::min())
 312         (duration_values::max()): Add noexcept.
 313         (duration::zero(), duration::min(), duration::max()): Likewise.
 314         (time_point::zero(), time_point::min(), time_point::max()): Likewise.
 315         * testsuite/20_util/duration/requirements/noexcept.cc: New test.
 316         * testsuite/20_util/time_point/requirements/noexcept.cc: New test.
 317
 318         * include/std/version (__cpp_lib_erase_if): Move to C++20 group.
 319
 320 2019-01-11  Jakub Jelinek  <jakub@redhat.com>
 321
 322         * include/std/type_traits (__cpp_lib_is_constant_evaluated): Define.
 323         * include/std/version (__cpp_lib_is_constant_evaluated): Define.
 324
 325 2019-01-11  Jonathan Wakely  <jwakely@redhat.com>
 326
 327         PR libstdc++/88802
 328         * include/bits/functional_hash.h (hash<nullptr_t>): Define
 329         specialization for C++17 (P0513R0, LWG 2817).
 330         * testsuite/20_util/hash/nullptr.cc: New test.
 331
 332         PR libstdc++/88125
 333         * config/abi/pre/gnu.ver (GLIBCXX_3.4.6): Remove unused duplicate
 334         pattern for std::basic_stringbuf::str().
 335
 336         * config/abi/pre/gnu.ver (GLIBCXX_3.4): Correct recent changes to
 337         basic_ostream::operator<< patterns.
 338
 339 2019-01-10  Jonathan Wakely  <jwakely@redhat.com>
 340
 341         * testsuite/27_io/filesystem/operations/last_write_time.cc: Fix
 342         test failures on targets with 32-bit time_t.
 343
 344         * include/bits/erase_if.h: Define __cpp_lib_erase_if.
 345         * include/std/deque: Likewise.
 346         * include/std/forward_list: Likewise.
 347         * include/std/list: Likewise.
 348         * include/std/string: Likewise.
 349         * include/std/vector: Likewise.
 350         * include/std/version: Likewise.
 351         * testsuite/21_strings/basic_string/erasure.cc: Test macro.
 352         * testsuite/23_containers/deque/erasure.cc: Likewise.
 353         * testsuite/23_containers/forward_list/erasure.cc: Likewise.
 354         * testsuite/23_containers/list/erasure.cc: Likewise.
 355         * testsuite/23_containers/map/erasure.cc: Likewise.
 356         * testsuite/23_containers/set/erasure.cc: Likewise.
 357         * testsuite/23_containers/unordered_map/erasure.cc: Likewise.
 358         * testsuite/23_containers/unordered_set/erasure.cc: Likewise.
 359         * testsuite/23_containers/vector/erasure.cc: Likewise.
 360
 361         * include/experimental/internet [AI_NUMERICSERV]
 362         (resolver_base::numeric_service): Define conditionally.
 363         * testsuite/experimental/net/internet/resolver/base.cc: Test it
 364         conditionally.
 365         * testsuite/experimental/net/internet/resolver/ops/lookup.cc:
 366         Likewise.
 367
 368 2019-01-10  Ville Voutilainen  <ville.voutilainen@gmail.com>
 369             Jonathan Wakely  <jwakely@redhat.com>
 370
 371         Implement LWG 2221
 372         * config/abi/pre/gnu.ver (GLIBCXX_3.4): Tighten patterns.
 373         (GLIBCXX_3.4.26): Add new exports.
 374         * include/Makefile.am: Add ostream-inst.cc. Move string-inst.cc to
 375         correct list of sources.
 376         * include/Makefile.in: Regenerate.
 377         * include/std/ostream (operator<<(nullptr_t)): New member function.
 378         * src/c++17/ostream-inst.cc: New file.
 379         * testsuite/27_io/basic_ostream/inserters_other/char/lwg2221.cc: New
 380         test.
 381
 382 2019-01-10  Jonathan Wakely  <jwakely@redhat.com>
 383
 384         * testsuite/util/testsuite_fs.h (nonexistent_path): Include name
 385         of the source file containing the caller.
 386         * testsuite/27_io/filesystem/iterators/directory_iterator.cc: Remove
 387         directories created by test.
 388         * testsuite/27_io/filesystem/iterators/recursive_directory_iterator.cc:
 389         Likewise.
 390         * testsuite/experimental/filesystem/iterators/directory_iterator.cc:
 391         Likewise.
 392         * testsuite/experimental/filesystem/iterators/
 393         recursive_directory_iterator.cc: Likewise.
 394
 395 2019-01-10  Jakub Jelinek  <jakub@redhat.com>
 396
 397         PR tree-optimization/88775
 398         * include/bits/stl_function.h (greater<_Tp*>::operator(),
 399         less<_Tp*>::operator(), greater_equal<_Tp*>::operator(),
 400         less_equal<_Tp*>::operator()): Use __builtin_is_constant_evaluated
 401         instead of __builtin_constant_p if available.  Don't bother with
 402         the pointer comparison in C++11 and earlier.
 403
 404 2019-01-09  Sandra Loosemore  <sandra@codesourcery.com>
 405
 406         PR other/16615
 407
 408         * include/ext/bitmap_allocator.h: Mechanically replace "can not"
 409         with "cannot".
 410
 411 2019-01-09  Jonathan Wakely  <jwakely@redhat.com>
 412
 413         * testsuite/libstdc++-prettyprinters/cxx17.cc: Fix expected output
 414         for filesystem::path. Give variables more distinctive names.
 415
 416         * include/std/optional (_Optional_payload_base::_M_copy_assign): New
 417         member function to perform non-trivial assignment.
 418         (_Optional_payload_base::_M_move_assign): Likewise.
 419         (_Optional_payload<T, true, false, true>::operator=)
 420         (_Optional_payload<T, true, true, false>::operator=)
 421         (_Optional_payload<T, true, false, false>::operator=): Call
 422         _M_copy_assign and/or _M_move_assign to do non-trivial assignments.
 423
 424         PR libstdc++/88204
 425         * testsuite/26_numerics/complex/operators/more_constexpr.cc: Do not
 426         test std::complex<long double> if long double format is IBM128.
 427         * testsuite/26_numerics/complex/requirements/more_constexpr.cc:
 428         Likewise.
 429
 430 2019-01-08  Jonathan Wakely  <jwakely@redhat.com>
 431
 432         * testsuite/libstdc++-prettyprinters/compat.cc: Test printer support
 433         for old std::unique_ptr layout.
 434         * testsuite/libstdc++-prettyprinters/cxx17.cc: Fix std::variant test
 435         to become valueless. Add filesystem::path tests.
 436
 437         PR libstdc++/87855
 438         * include/std/optional (_Optional_payload_base): New class template
 439         for common code hoisted from _Optional_payload specializations. Use
 440         a template for the union, to allow a partial specialization for
 441         types with non-trivial destructors. Add constructors for in-place
 442         initialization to the union.
 443         (_Optional_payload(bool, const _Optional_payload&)): Use _M_construct
 444         to perform non-trivial copy construction, instead of relying on
 445         non-standard copy elision in a delegating constructor.
 446         (_Optional_payload(bool, _Optional_payload&&)): Likewise for
 447         non-trivial move construction.
 448         (_Optional_payload): Derive from _Optional_payload_base and use it
 449         for everything except the non-trivial assignment operators, which are
 450         defined as needed.
 451         (_Optional_payload<false, C, M>): Derive from the specialization
 452         _Optional_payload<true, false, false> and add a destructor.
 453         (_Optional_base_impl::_M_destruct, _Optional_base_impl::_M_reset):
 454         Forward to corresponding members of _Optional_payload.
 455         (_Optional_base_impl::_M_is_engaged, _Optional_base_impl::_M_get):
 456         Hoist common members from _Optional_base.
 457         (_Optional_base): Make all members and base class public.
 458         (_Optional_base::_M_get, _Optional_base::_M_is_engaged): Move to
 459         _Optional_base_impl.
 460         * python/libstdcxx/v6/printers.py (StdExpOptionalPrinter): Add
 461         support for new std::optional layout.
 462         * testsuite/libstdc++-prettyprinters/compat.cc: New test.
 463
 464         PR libstdc++/88066
 465         * include/bits/locale_conv.h: Use <> for includes not "".
 466         * include/ext/random: Likewise.
 467         * include/ext/vstring.h: Likewise.
 468
 469 2019-01-08  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
 470
 471         * config/abi/pre/gnu.ver (GLIBCXX_3.4): Tighten existing patterns.
 472         (GLIBCXX_3.4.21): Likewise.
 473
 474 2019-01-08  Jonathan Wakely  <jwakely@redhat.com>
 475
 476         PR libstdc++/88749
 477         * src/filesystem/ops.cc (last_write_time): Fix preprocessor condition
 478         to match the one that controls whether utimbuf and utime are declared.
 479
 480 2019-01-07  Jonathan Wakely  <jwakely@redhat.com>
 481
 482         PR libstdc++/87787
 483         * include/bits/char_traits.h (char_traits::move): Do not pass null
 484         pointers to memmove.
 485         * include/bits/locale_facets.h
 486         (ctype<char>::widen(const char*, const char*, char*)): Do not
 487         pass null pointers to memcpy.
 488         (ctype<char>::narrow(const char*, const char*, char, char*)):
 489         Likewise.
 490         (ctype<char>::do_widen(const char*, const char*, char*)):
 491         Likewise.
 492         (ctype<char>::do_narrow(const char*, const char*, char, char*)):
 493         Likewise.
 494
 495         * doc/xml/manual/spine.xml: Update copyright years.
 496         * doc/xml/manual/status_cxx2017.xml: Adjust note about -lstdc++fs.
 497         * doc/xml/manual/using.xml: Remove requirement to link with -lstdc++fs
 498         for C++17 filesystem library.
 499         * doc/html/*: Regenerate.
 500
 501         * acinclude.m4 (GLIBCXX_CHECK_FILESYSTEM_DEPS): Check for truncate.
 502         * config.h.in: Regenerate.
 503         * config/abi/pre/gnu.ver: Order patterns for filesystem operations
 504         alphabetically and add missing entries for copy_symlink,
 505         hard_link_count, rename, and resize_file.
 506         * configure: Regenerate.
 507         * src/c++17/fs_ops.cc (resize_file): Remove #if so posix::truncate is
 508         used unconditionally.
 509         * src/filesystem/ops-common.h (__gnu_posix::truncate)
 510         [!_GLIBCXX_HAVE_TRUNCATE]: Provide fallback definition that only
 511         supports truncating to zero length.
 512         * testsuite/27_io/filesystem/operations/all.cc: New test.
 513         * testsuite/27_io/filesystem/operations/resize_file.cc: New test.
 514
 515 2019-01-06  Jonathan Wakely  <jwakely@redhat.com>
 516
 517         PR libstdc++/86756
 518         * acinclude.m4 (GLIBCXX_CHECK_FILESYSTEM_DEPS): Check for utime and
 519         lstat and define _GLIBCXX_USE_UTIME and _GLIBCXX_USE_LSTAT.
 520         * config.h.in: Regenerate.
 521         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Export symbols for
 522         remaining std::filesystem types and functions.
 523         * configure: Regenerate.
 524         * src/c++17/Makefile.am: Add C++17 filesystem sources.
 525         * src/c++17/Makefile.in: Regenerate.
 526         * src/c++17/cow-fs_dir.cc: Move src/filesystem/cow-std-dir.cc to
 527         here, and change name of included file.
 528         * src/c++17/cow-fs_ops.cc: Move src/filesystem/cow-std-ops.cc to
 529         here, and change name of included file.
 530         * src/c++17/fs_dir.cc: Move src/filesystem/std-dir.cc to here. Change
 531         path to dir-common.h.
 532         * src/c++17/fs_ops.cc: Move src/filesystem/std-ops.cc to here. Change
 533         path to ops-common.h. Disable -Wunused-parameter warnings.
 534         (internal_file_clock): Define unconditionally.
 535         [!_GLIBCXX_HAVE_SYS_STAT_H] (internal_file_clock::from_stat): Do not
 536         define.
 537         (do_copy_file, do_space): Move definitions to ops.common.h.
 538         (copy, file_size, hard_link_count, last_write_time, space): Only
 539         perform operation when _GLIBCXX_HAVE_SYS_STAT_H is defined, otherwise
 540         report an error.
 541         (last_write_time, read_symlink): Remove unused attributes from
 542         parameters.
 543         * src/filesystem/Makefile.am: Remove C++17 filesystem sources.
 544         * src/filesystem/Makefile.in: Regenerate.
 545         * src/filesystem/cow-std-dir.cc: Move to src/c++17/cow-fs_dir.cc.
 546         * src/filesystem/cow-std-ops.cc: Move to src/c++17/cow-fs_ops.cc.
 547         * src/filesystem/std-dir.cc: Move to src/c++17/fs_dir.cc.
 548         * src/filesystem/std-ops.cc: Move to src/c++17/fs_ops.cc.
 549         * src/filesystem/dir-common.h [!_GLIBCXX_HAVE_DIRENT_H]: Define
 550         dummy types and functions instead of using #error.
 551         * src/filesystem/dir.cc [!_GLIBCXX_HAVE_DIRENT_H]: Use #error.
 552         * src/filesystem/ops-common.h [!_GLIBCXX_USE_LSTAT] (lstat): Define
 553         in terms of stat.
 554         [!_GLIBCXX_HAVE_UNISTD_H]: Define dummy types and functions.
 555         (do_copy_file, do_space): Move definitions here from std-ops.cc.
 556         * src/filesystem/ops.cc: Adjust calls to do_copy_file and do_space
 557         to account for new namespace.
 558         * testsuite/27_io/filesystem/directory_entry/86597.cc: Remove
 559         -lstdc++fs from dg-options.
 560         * testsuite/27_io/filesystem/directory_entry/lwg3171.cc: Likewise.
 561         * testsuite/27_io/filesystem/file_status/1.cc: Likewise.
 562         * testsuite/27_io/filesystem/filesystem_error/cons.cc: Likewise.
 563         * testsuite/27_io/filesystem/filesystem_error/copy.cc: Likewise.
 564         * testsuite/27_io/filesystem/iterators/directory_iterator.cc:
 565         Likewise.
 566         * testsuite/27_io/filesystem/iterators/pop.cc: Likewise.
 567         * testsuite/27_io/filesystem/iterators/recursive_directory_iterator.cc:
 568         Likewise.
 569         * testsuite/27_io/filesystem/operations/absolute.cc: Likewise.
 570         * testsuite/27_io/filesystem/operations/canonical.cc: Likewise.
 571         * testsuite/27_io/filesystem/operations/copy.cc: Likewise.
 572         * testsuite/27_io/filesystem/operations/copy_file.cc: Likewise.
 573         * testsuite/27_io/filesystem/operations/create_directories.cc:
 574         Likewise.
 575         * testsuite/27_io/filesystem/operations/create_directory.cc: Likewise.
 576         * testsuite/27_io/filesystem/operations/create_symlink.cc: Likewise.
 577         * testsuite/27_io/filesystem/operations/current_path.cc: Likewise.
 578         * testsuite/27_io/filesystem/operations/equivalent.cc: Likewise.
 579         * testsuite/27_io/filesystem/operations/exists.cc: Likewise.
 580         * testsuite/27_io/filesystem/operations/file_size.cc: Likewise.
 581         * testsuite/27_io/filesystem/operations/is_empty.cc: Likewise.
 582         * testsuite/27_io/filesystem/operations/last_write_time.cc: Likewise.
 583         * testsuite/27_io/filesystem/operations/permissions.cc: Likewise.
 584         * testsuite/27_io/filesystem/operations/proximate.cc: Likewise.
 585         * testsuite/27_io/filesystem/operations/read_symlink.cc: Likewise.
 586         * testsuite/27_io/filesystem/operations/relative.cc: Likewise.
 587         * testsuite/27_io/filesystem/operations/remove.cc: Likewise.
 588         * testsuite/27_io/filesystem/operations/remove_all.cc: Likewise.
 589         * testsuite/27_io/filesystem/operations/space.cc: Likewise.
 590         * testsuite/27_io/filesystem/operations/status.cc: Likewise.
 591         * testsuite/27_io/filesystem/operations/symlink_status.cc: Likewise.
 592         * testsuite/27_io/filesystem/operations/temp_directory_path.cc:
 593         Likewise.
 594         * testsuite/27_io/filesystem/operations/weakly_canonical.cc: Likewise.
 595
 596
 597         PR libstdc++/86756
 598         * config/abi/pre/gnu.ver (GLIBCXX_3.4): Make various patterns for
 599         typeinfo and vtables less greedy.
 600         (GLIBCXX_3.4.26): Export symbols for std::filesystem::path.
 601         * src/c++17/Makefile.am: Add fs_path.cc and cow-fs_path.cc.
 602         * src/c++17/Makefile.in: Regenerate.
 603         * src/c++17/cow-fs_path.cc: Move src/filesystem/cow-std-path.cc to
 604         here, and change name of included file.
 605         * src/c++17/fs_path.cc: Move src/filesystem/std-path.cc to here.
 606         * src/filesystem/Makefile.am: Remove std-path.cc and cow-std-path.cc
 607         from sources.
 608         * src/filesystem/Makefile.in: Regenerate.
 609         * src/filesystem/cow-std-path.cc: Move to src/c++17/cow-fs_path.cc.
 610         * src/filesystem/std-path.cc: Move to src/c++17/fs_path.cc.
 611         * testsuite/27_io/filesystem/path/append/path.cc: Remove -lstdc++fs
 612         from dg-options and remove dg-require-filesystem-ts.
 613         * testsuite/27_io/filesystem/path/append/source.cc: Likewise.
 614         * testsuite/27_io/filesystem/path/assign/assign.cc: Likewise.
 615         * testsuite/27_io/filesystem/path/assign/copy.cc: Likewise.
 616         * testsuite/27_io/filesystem/path/compare/compare.cc: Likewise.
 617         * testsuite/27_io/filesystem/path/compare/lwg2936.cc: Likewise.
 618         * testsuite/27_io/filesystem/path/compare/path.cc: Likewise.
 619         * testsuite/27_io/filesystem/path/compare/strings.cc: Likewise.
 620         * testsuite/27_io/filesystem/path/concat/path.cc: Likewise.
 621         * testsuite/27_io/filesystem/path/concat/strings.cc: Likewise.
 622         * testsuite/27_io/filesystem/path/construct/80762.cc: Likewise.
 623         * testsuite/27_io/filesystem/path/construct/copy.cc: Likewise.
 624         * testsuite/27_io/filesystem/path/construct/default.cc: Likewise.
 625         * testsuite/27_io/filesystem/path/construct/format.cc: Likewise.
 626         * testsuite/27_io/filesystem/path/construct/locale.cc: Likewise.
 627         * testsuite/27_io/filesystem/path/construct/range.cc: Likewise.
 628         * testsuite/27_io/filesystem/path/construct/string_view.cc: Likewise.
 629         * testsuite/27_io/filesystem/path/decompose/extension.cc: Likewise.
 630         * testsuite/27_io/filesystem/path/decompose/filename.cc: Likewise.
 631         * testsuite/27_io/filesystem/path/decompose/parent_path.cc: Likewise.
 632         * testsuite/27_io/filesystem/path/decompose/relative_path.cc: Likewise.
 633         * testsuite/27_io/filesystem/path/decompose/root_directory.cc:
 634         Likewise.
 635         * testsuite/27_io/filesystem/path/decompose/root_name.cc: Likewise.
 636         * testsuite/27_io/filesystem/path/decompose/root_path.cc: Likewise.
 637         * testsuite/27_io/filesystem/path/decompose/stem.cc: Likewise.
 638         * testsuite/27_io/filesystem/path/generation/normal.cc: Likewise.
 639         * testsuite/27_io/filesystem/path/generation/normal2.cc: Likewise.
 640         * testsuite/27_io/filesystem/path/generation/proximate.cc: Likewise.
 641         * testsuite/27_io/filesystem/path/generation/relative.cc: Likewise.
 642         * testsuite/27_io/filesystem/path/generic/generic_string.cc: Likewise.
 643         * testsuite/27_io/filesystem/path/itr/components.cc: Likewise.
 644         * testsuite/27_io/filesystem/path/itr/traversal.cc: Likewise.
 645         * testsuite/27_io/filesystem/path/modifiers/clear.cc: Likewise.
 646         * testsuite/27_io/filesystem/path/modifiers/make_preferred.cc:
 647         Likewise.
 648         * testsuite/27_io/filesystem/path/modifiers/remove_filename.cc:
 649         Likewise.
 650         * testsuite/27_io/filesystem/path/modifiers/replace_extension.cc:
 651         Likewise.
 652         * testsuite/27_io/filesystem/path/modifiers/replace_filename.cc:
 653         Likewise.
 654         * testsuite/27_io/filesystem/path/modifiers/swap.cc: Likewise.
 655         * testsuite/27_io/filesystem/path/native/string.cc: Likewise.
 656         * testsuite/27_io/filesystem/path/nonmember/append.cc: Likewise.
 657         * testsuite/27_io/filesystem/path/nonmember/hash_value.cc: Likewise.
 658         * testsuite/27_io/filesystem/path/query/empty.cc: Likewise.
 659         * testsuite/27_io/filesystem/path/query/has_extension.cc: Likewise.
 660         * testsuite/27_io/filesystem/path/query/has_filename.cc: Likewise.
 661         * testsuite/27_io/filesystem/path/query/has_parent_path.cc: Likewise.
 662         * testsuite/27_io/filesystem/path/query/has_relative_path.cc: Likewise.
 663         * testsuite/27_io/filesystem/path/query/has_root_directory.cc:
 664         Likewise.
 665         * testsuite/27_io/filesystem/path/query/has_root_name.cc: Likewise.
 666         * testsuite/27_io/filesystem/path/query/has_root_path.cc: Likewise.
 667         * testsuite/27_io/filesystem/path/query/has_stem.cc: Likewise.
 668         * testsuite/27_io/filesystem/path/query/is_absolute.cc: Likewise.
 669         * testsuite/27_io/filesystem/path/query/is_relative.cc: Likewise.
 670
 671         PR libstdc++/87431
 672         * include/std/variant (_Variant_storage<true, _Types...>::_M_valid):
 673         Check is_trivially_copyable instead of is_scalar.
 674         (variant::emplace<N, Args>(Args&&...)): If construction of the new
 675         contained value can throw and its type is trivially copyable then
 676         construct into a temporary variant and move from it, to provide the
 677         strong exception safety guarantee.
 678         (variant::emplace<N, U, Args>(initializer_list<U>, Args&&...)):
 679         Likewise.
 680         * testsuite/20_util/variant/87431.cc: New test.
 681         * testsuite/20_util/variant/run.cc: Adjust test so that throwing
 682         conversion causes valueless state.
 683
 684         PR libstdc++/88607
 685         * testsuite/17_intro/headers/c++1998/charset.cc: New test.
 686         * testsuite/17_intro/headers/c++2011/charset.cc: New test.
 687         * testsuite/17_intro/headers/c++2014/charset.cc: New test.
 688         * testsuite/17_intro/headers/c++2017/charset.cc: New test.
 689         * testsuite/17_intro/headers/c++2020/charset.cc: New test.
 690
 691 2019-01-05  Jonathan Wakely  <jwakely@redhat.com>
 692
 693         * include/bits/fs_fwd.h (__file_clock): Define new clock.
 694         (file_time_type): Redefine in terms of __file_clock.
 695         * src/filesystem/ops-common.h (file_time): Add FIXME comment about
 696         overflow.
 697         * src/filesystem/std-ops.cc (is_set(perm_options, perm_options)): Give
 698         internal linkage.
 699         (internal_file_lock): New helper type for accessing __file_clock.
 700         (do_copy_file): Use internal_file_lock to convert system time to
 701         file_time_type.
 702         (last_write_time(const path&, error_code&)): Likewise.
 703         (last_write_time(const path&, file_time_type, error_code&)): Likewise.
 704
 705 2019-01-04  Jonathan Wakely  <jwakely@redhat.com>
 706
 707         * config/abi/pre/gnu.ver (GLIBCXX_3.4.21): Make patterns less greedy
 708         for const member functions of std::basic_string.
 709         (GLIBCXX_3.4.26): Export member functions of std::basic_string added
 710         in C++17.
 711         * include/bits/basic_string.h (basic_string(__sv_wrapper, const A&)):
 712         Make non-standard constructor private.
 713         [!_GLIBCXX_USE_CXX11_ABI] (basic_string(__sv_wrapper, const A&)):
 714         Likewise.
 715         * include/bits/basic_string.tcc (std::string, std::wstring): Declare
 716         explicit instantiations for C++17 as well as earlier dialects.
 717         * src/c++17/Makefile.am: Add new source files.
 718         * src/c++17/Makefile.in: Regenerate.
 719         * src/c++17/cow-string-inst.cc: New file defining explicit
 720         instantiations for basic_string member functions added in C++17.
 721         * src/c++17/string-inst.cc: Likewise.
 722
 723         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Export allocator-extended
 724         copy/move constructors for old std::basic_string.
 725         * include/bits/basic_string.h [!_GLIBCXX_USE_CXX11_ABI]
 726         (basic_string::reference, basic_string::const_reference): Define
 727         as plain references for C++11 and later.
 728         (basic_string::basic_string()): Put constructor body outside
 729         preprocessor conditional groups.
 730         (basic_string::basic_string(basic_string&&)): Move _Alloc_hider
 731         instead of copying it.
 732         (basic_string::basic_string(const basic_string&, const _Alloc&)):
 733         Define.
 734         (basic_string::basic_string(basic_string&&, const _Alloc&)):
 735         Define.
 736         * include/bits/fs_path.h [!_GLIBCXX_USE_CXX11_ABI]: Remove special
 737         cases for old basic_string.
 738         * testsuite/21_strings/basic_string/cons/char/8.cc: Test
 739         allocator-extended constructors unconditionally. Add extra members to
 740         allocator type when using old string ABI.
 741         * testsuite/21_strings/basic_string/allocator/71964.cc: Enable test
 742         for old string ABI.
 743         * testsuite/21_strings/basic_string/cons/wchar_t/8.cc: Likewise.
 744
 745         * testsuite/23_containers/list/61347.cc: Avoid spurious failure when
 746         -fno-inline added to test flags.
 747
 748         * testsuite/21_strings/basic_string/requirements/
 749         explicit_instantiation/debug.cc: Remove XFAIL for old ABI.
 750
 751         * testsuite/27_io/filesystem/filesystem_error/copy.cc: Fix static
 752         assertion failures with old std::string ABI.
 753
 754         * include/bits/fs_path.h (path::_List::erase): Replace both overloads
 755         with ...
 756         (path::pop_back(), path::_M_erase_from(const_iterator)): New member
 757         functions that will only erase elements at the end.
 758         * src/filesystem/std-path.cc (path::_List::_Impl::pop_back()): Define.
 759         (path::_List::_Impl::_M_erase_from(const_iterator)): Define.
 760         (path::_List::operator=(const _List&)): Use _M_erase_from(p) instead
 761         of erase(p, end()).
 762         (path::_List::pop_back()): Define.
 763         (path::_List::_M_erase_from(const_iterator)): Define.
 764         (path::operator/=(const path&)): Use pop_back to remove last component
 765         and _M_erase_from to remove multiple components.
 766         (path::_M_append(basic_string_view<value_type>)): Likewise.
 767         (path::operator+=(const path&)): Likewise.
 768         (path::_M_concat(basic_string_view<value_type>)): Likewise.
 769         (path::remove_filename()): Likewise.
 770         (path::lexically_normal()): Use _List::_Impl iterators instead of
 771         path::iterator. Use pop_back to remove components from the end. Clear
 772         trailing filename, instead of using erase(const_iterator) to remove
 773         a non-final component.
 774         * testsuite/27_io/filesystem/path/generation/normal.cc: Test
 775         additional cases.
 776         * testsuite/27_io/filesystem/path/generation/normal2.cc: New test.
 777
 778         * src/filesystem/std-path.cc (path::operator+=(const path&)): Fix
 779         incorrect treatment of empty filename after trailing slash.
 780         * testsuite/27_io/filesystem/path/concat/path.cc: Test problem case.
 781
 782         * testsuite/21_strings/basic_string/modifiers/assign/char/
 783         move_assign_optim.cc: Avoid spurious failure when -fno-inline added
 784         to test flags.
 785         * testsuite/21_strings/basic_string/modifiers/assign/wchar_t/
 786         move_assign_optim.cc: Likewise.
 787
 788 2019-01-03  Jonathan Wakely  <jwakely@redhat.com>
 789             Jakub Jelinek  <jakub@redhat.com>
 790
 791         PR libstdc++/88607
 792         * include/experimental/memory: Replace UTF-8 quote characters.
 793         * include/std/future: Replace UTF-8 "em dash" characters.
 794
 795 2019-01-03  Jonathan Wakely  <jwakely@redhat.com>
 796
 797         PR libstdc++/88607
 798         * include/bits/forward_list.h: Replace UTF-8 "ligature fi" character.
 799         * include/debug/forward_list: Likewise.
 800         * include/experimental/bits/shared_ptr.h: Remove UTF-8 "section sign"
 801         character.
 802         * include/experimental/chrono: Likewise.
 803         * include/experimental/functional: Likewise.
 804         * include/experimental/ratio: Likewise.
 805         * include/experimental/system_error: Likewise.
 806         * include/experimental/tuple: Likewise.
 807         * include/experimental/type_traits: Likewise.
 808         * include/parallel/workstealing.h: Replace UTF-8 "en dash" character.
 809         * include/parallel/multiseq_selection.h: Likewise.
 810
 811         PR libstdc++/88681
 812         * config/abi/pre/gnu.ver: Add missing exports.
 813         * testsuite/22_locale/collate_byname/88681.cc: New test.
 814         * testsuite/22_locale/time_get/get/char/88681.cc: New test.
 815         * testsuite/22_locale/time_get/get/wchar_t/88681.cc: New test.
 816
 817 2019-01-02  Jonathan Wakely  <jwakely@redhat.com>
 818
 819         * testsuite/23_containers/map/cons/deduction.cc: Test deduction from
 820         initializer_list<value_type> and from input iterator ranges.
 821         * testsuite/23_containers/multimap/cons/deduction.cc: Likewise.
 822
 823         * testsuite/experimental/string_view/element_access/char/empty.cc:
 824         Fix year range in copyright header.
 825
 826 2019-01-02  Joel Brobecker  <brobecker@adacore.com>
 827
 828         * testsuite/21_strings/basic_string_view/element_access/char/empty.cc:
 829         Fix year range in copyright header.
 830
 831 2019-01-01  Jakub Jelinek  <jakub@redhat.com>
 832
 833         Update copyright years.
 834 \f
 835 Copyright (C) 2019 Free Software Foundation, Inc.
 836
 837 Copying and distribution of this file, with or without modification,
 838 are permitted in any medium without royalty provided the copyright
 839 notice and this notice are preserved.