libstdc++-v3/ChangeLog

   1 2019-02-14  Jonathan Wakely  <jwakely@redhat.com>
   2
   3         * doc/xml/manual/intro.xml: Document LWG 2566 status.
   4         * include/bits/stl_queue.h (queue, priority_queue): Add static
   5         assertions to enforce LWG 2566 requirement on value_type.
   6         * include/bits/stl_stack.h (stack): Likewise.
   7
   8         PR middle-end/89303
   9         * testsuite/20_util/enable_shared_from_this/89303.cc: New test.
  10
  11         * doc/xml/manual/intro.xml: Document LWG 2735 status.
  12         * include/bits/std_abs.h: Add comment about LWG 2735.
  13         * testsuite/26_numerics/headers/cstdlib/dr2735.cc: New test.
  14
  15 2019-02-13  Jonathan Wakely  <jwakely@redhat.com>
  16
  17         PR libstdc++/89345
  18         * include/std/version [__cpp_impl_destroying_delete]
  19         (__cpp_lib_destroying_delete): Only define for C++2a and later.
  20         * libsupc++/new [__cpp_impl_destroying_delete]
  21         (__cpp_lib_destroying_delete): Likewise.
  22         (destroying_delete_t, destroying_delete): Likewise, but define even
  23         when __cpp_impl_destroying_delete is not defined.
  24         * testsuite/18_support/destroying_delete.cc: New test.
  25
  26 2019-02-11  Jonathan Wakely  <jwakely@redhat.com>
  27
  28         PR libstdc++/89023
  29         * testsuite/17_intro/headers/c++2011/parallel_mode.cc: New test.
  30         * testsuite/17_intro/headers/c++2014/parallel_mode.cc: New test.
  31         * testsuite/17_intro/headers/c++2017/parallel_mode.cc: New test.
  32         * testsuite/28_regex/headers/regex/parallel_mode.cc: Remove.
  33
  34 2019-02-09  Jonathan Wakely  <jwakely@redhat.com>
  35
  36         PR libstdc++/71044
  37         * include/bits/fs_path.h (path::has_root_name)
  38         (path::has_root_directory, path::has_root_path)
  39         (path::has_relative_path, path::has_parent_path)
  40         (path::has_filename, path::has_stem, path::has_extension)
  41         (path::is_absolute, path::is_relative, path::_M_find_extension): Add
  42         noexcept.
  43         * src/c++17/fs_path.cc (path::has_root_name)
  44         (path::has_root_directory, path::has_root_path)
  45         (path::has_relative_path, path::has_parent_path)
  46         (path::has_filename, path::_M_find_extension): Add noexcept.
  47
  48 2019-02-06  Jonathan Wakely  <jwakely@redhat.com>
  49
  50         PR libstdc++/89102 (partial)
  51         * include/std/type_traits (common_type<>): Define.
  52         (common_type<T>): Derive from common_type<T, T>.
  53         * testsuite/20_util/common_type/requirements/explicit_instantiation.cc:
  54         Test zero-length template argument list.
  55         * testsuite/20_util/common_type/requirements/sfinae_friendly_1.cc:
  56         Test additional single argument cases.
  57         * testsuite/20_util/common_type/requirements/sfinae_friendly_2.cc:
  58         Adjust expected error.
  59
  60 2019-02-05  Jonathan Wakely  <jwakely@redhat.com>
  61
  62         PR libstdc++/89128
  63         * include/bits/stl_queue.h (queue, priority_queue): Add deduction
  64         guides.
  65         * include/bits/stl_stack.h (stack): Likewise.
  66         * testsuite/23_containers/priority_queue/deduction.cc: New test.
  67         * testsuite/23_containers/queue/deduction.cc: New test.
  68         * testsuite/23_containers/stack/deduction.cc: New test.
  69
  70         PR libstdc++/89194
  71         * include/std/type_traits (__is_convertible_helper)
  72         (__is_convertible_helper<_From, _To, false>): Revert changes to
  73         support is_nothrow_convertible.
  74         (__is_nt_convertible_helper): New helper.
  75         (is_nothrow_convertible): Use __is_nt_convertible_helper.
  76
  77         * testsuite/23_containers/vector/modifiers/push_back/49836.cc: Restore
  78         use of CopyConsOnlyType, but also test DelAnyAssign for completeness.
  79
  80         PR libstdc++/89130
  81         * include/bits/alloc_traits.h (__is_copy_insertable_impl): Rename to
  82         __is_alloc_insertable_impl. Replace single type member with two
  83         members, one for each of copy and move insertable.
  84         (__is_move_insertable): New trait for internal use.
  85         * include/bits/stl_vector.h (vector::_S_nothrow_relocate(true_type))
  86         (vector::_S_nothrow_relocate(true_type)): New functions to
  87         conditionally check if __relocate_a can throw.
  88         (vector::_S_use_relocate()): Dispatch to _S_nothrow_relocate based
  89         on __is_move_insertable.
  90         (vector::_S_do_relocate): New overloaded functions to conditionally
  91         call __relocate_a.
  92         (vector::_S_relocate): New function that dispatches to _S_do_relocate
  93         based on _S_use_relocate.
  94         * include/bits/vector.tcc (vector::reserve, vector::_M_realloc_insert)
  95         (vector::_M_default_append): Call _S_relocate instead of __relocate_a.
  96         * testsuite/23_containers/vector/modifiers/push_back/89130.cc: New.
  97
  98         PR libstdc++/89090
  99         * include/bits/stl_uninitialized.h (__relocate_a_1): Make unused
 100         parameter unnamed. Add message to static assertion.
 101         * include/bits/vector.tcc (vector::reserve, vector::_M_realloc_insert)
 102         (vector::_M_default_append): Use _GLIBCXX17_CONSTEXPR for if constexpr
 103         in C++11 code.
 104
 105 2019-02-05  Marc Glisse  <marc.glisse@inria.fr>
 106
 107         PR libstdc++/87106
 108         * include/bits/stl_uninitialized.h (__is_trivially_relocatable):
 109         Rename...
 110         (__is_bitwise_relocatable): ... to this.
 111         (__relocate_a_1): Adapt.
 112         * include/bits/stl_deque.h (__is_trivially_relocatable): Rename...
 113         (__is_bitwise_relocatable): ... to this.
 114
 115 2019-01-30  Jonathan Wakely  <jwakely@redhat.com>
 116
 117         PR libstdc++/89117
 118         * src/c++17/fs_path.cc (path::replace_extension): Erase extension from
 119         final component as well as from _M_pathname. Append the dot using
 120         operator+= instead of only to _M_pathname.
 121         (path::_M_find_extension): Reformat slightly.
 122         * testsuite/27_io/filesystem/path/modifiers/replace_extension.cc:
 123         Add more test cases.
 124
 125 2019-01-30  Ulrich Drepper  <drepper@redhat.com>
 126
 127         * doc/xml/manual/status_cxx2020.xml: Update P0600 entry.
 128
 129 2019-01-29  Jonathan Wakely  <jwakely@redhat.com>
 130
 131         * testsuite/26_numerics/headers/complex/synopsis.cc: Remove incorrect
 132         constexpr specifiers from arg and proj.
 133
 134         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Add missing exports for
 135         __shared_ptr instantiations used by gcc4-compatible ABI.
 136
 137         * include/experimental/forward_list (experimental::erase): Qualify
 138         call to erase_if.
 139         * include/experimental/list (experimental::erase): Likewise.
 140         * include/std/forward_list (std::erase): Likewise.
 141         * include/std/list (std::erase): Likewise.
 142
 143         * testsuite/20_util/reference_wrapper/result_type.cc: Disable for
 144         C++2a.
 145         * testsuite/20_util/reference_wrapper/typedefs-2.cc: Likewise.
 146         * testsuite/20_util/reference_wrapper/typedefs-3.cc: Likewise.
 147         * testsuite/20_util/reference_wrapper/typedefs.cc: Likewise.
 148         * testsuite/30_threads/async/54297.cc: Suppress nodiscard warning.
 149         * testsuite/ext/array_allocator/26875.cc: Likewise.
 150         * testsuite/ext/pool_allocator/allocate_chunk.cc: Likewise.
 151         * testsuite/util/replacement_memory_operators.h: Likewise.
 152         * testsuite/util/testsuite_allocator.h: Likewise.
 153
 154         * include/std/memory_resource (__pool_resource::_M_unpooled): Use
 155         normal mode vector, even for debug mode.
 156         * include/std/vector [_GLIBCXX_DEBUG] (_GLIBCXX_STD_C::pmr::vector):
 157         Define alias template for normal mode vector.
 158
 159 2019-01-28  Jonathan Wakely  <jwakely@redhat.com>
 160
 161         PR libstdc++/68737
 162         * config/locale/generic/c_locale.h (__convert_from_v)
 163         [_GLIBCXX_USE_C99_STDIO]: Also check _GLIBCXX_HAVE_BROKEN_VSNPRINTF.
 164         * config/os/hpux/os_defines.h: Define _GLIBCXX_HAVE_BROKEN_VSNPRINTF.
 165         * include/bits/locale_facets.tcc (num_put::_M_insert_float)
 166         [_GLIBCXX_USE_C99_STDIO]: Also check _GLIBCXX_HAVE_BROKEN_VSNPRINTF.
 167
 168 2019-01-24  Jonathan Wakely  <jwakely@redhat.com>
 169
 170         PR libstdc++/88840
 171         * include/bits/stl_vector.h (vector::__use_relocate): Replace static
 172         data member with static member function _S_use_relocate().
 173         * include/bits/vector.tcc (vector::reserve, vector::_M_realloc_insert)
 174         (vector::_M_default_append): Use _S_use_relocate() instead of
 175         __use_relocate.
 176
 177         * testsuite/27_io/filesystem/path/compare/strings.cc: Only compare
 178         sign of results.
 179
 180 2019-01-22  Jonathan Wakely  <jwakely@redhat.com>
 181
 182         PR libstdc++/88740
 183         * testsuite/util/testsuite_hooks.h [stderr] (VERIFY): Use fprintf to
 184         write to stderr instead of using printf.
 185
 186 2019-01-21  Jakub Jelinek  <jakub@redhat.com>
 187
 188         PR libstdc++/86590
 189         * include/bits/char_traits.h (__constant_string_p,
 190         __constant_char_array_p): Use __builtin_is_constant_evaluated if
 191         available.
 192
 193 2019-01-20  Ulrich Drepper  <drepper@redhat.com>
 194
 195         Implement C++20 P0600r1.
 196         * include/backward/hash_map: Add nodiscard attribute to empty.
 197         * include/backward/hash_set: Likewise.
 198         * backward/hashtable.h: Likewise.
 199         * include/bits/basic_string.h: Likewise.
 200         * include/bits/forward_list.h: Likewise.
 201         * include/bits/hashtable.h: Likewise.
 202         * include/bits/regex.h: Likewise.
 203         * include/bits/stl_deque.h: Likewise.
 204         * include/bits/stl_list.h: Likewise.
 205         * include/bits/stl_map.h: Likewise.
 206         * include/bits/stl_multimap.h: Likewise.
 207         * include/bits/stl_multiset.h: Likewise.
 208         * include/bits/stl_queue.h: Likewise.
 209         * include/bits/stl_set.h: Likewise.
 210         * include/bits/stl_stack.h: Likewise.
 211         * include/bits/stl_tree.h: Likewise.
 212         * include/bits/stl_vector.h: Likewise.
 213         * include/bits/unordered_map.h: Likewise.
 214         * include/bits/unordered_set.h: Likewise.
 215         * include/debug/array: Likewise.
 216         * include/experimental/any: Likewise.
 217         * include/experimental/bits/fs_path.h: Likewise.
 218         * include/experimental/internet: Likewise.
 219         * include/experimental/string_view: Likewise.
 220         * include/ext/pb_ds/detail/bin_search_tree_/info_fn_imps.hpp:
 221         Likewise.
 222         * include/ext/pb_ds/detail/binary_heap_/binary_heap_.hpp:
 223         Likewise.
 224         * include/ext/pb_ds/detail/binary_heap_/info_fn_imps.hpp:
 225         Likewise.
 226         * include/ext/pb_ds/detail/cc_hash_table_map_/cc_ht_map_.hpp:
 227         Likewise.
 228         * include/ext/pb_ds/detail/cc_hash_table_map_/info_fn_imps.hpp:
 229         Likewise.
 230         * include/ext/pb_ds/detail/cc_hash_table_map_/size_fn_imps.hpp:
 231         Likewise.
 232         * include/ext/pb_ds/detail/gp_hash_table_map_/gp_ht_map_.hpp:
 233         Likewise.
 234         * include/ext/pb_ds/detail/gp_hash_table_map_/info_fn_imps.hpp:
 235         Likewise.
 236         * include/ext/pb_ds/detail/left_child_next_sibling_heap_/
 237         info_fn_imps.hpp: Likewise.
 238         * include/ext/pb_ds/detail/left_child_next_sibling_heap_/
 239         left_child_next_sibling_heap_.hpp: Likewise.
 240         * include/ext/pb_ds/detail/list_update_map_/info_fn_imps.hpp:
 241         Likewise.
 242         * include/ext/pb_ds/detail/list_update_map_/lu_map_.hpp:
 243         Likewise.
 244         * include/ext/pb_ds/detail/ov_tree_map_/info_fn_imps.hpp:
 245         Likewise.
 246         * include/ext/pb_ds/detail/ov_tree_map_/ov_tree_map_.hp:
 247         Likewise.
 248         * include/ext/pb_ds/detail/pat_trie_/info_fn_imps.hpp:
 249         Likewise.
 250         * include/ext/pb_ds/detail/pat_trie_/pat_trie_.hpp:
 251         Likewise.
 252         * include/ext/pb_ds/detail/rc_binomial_heap_/rc.hpp:
 253         Likewise.
 254         * include/ext/pb_ds/detail/tree_trace_base.hpp: Likewise.
 255         * include/ext/pb_ds/trie_policy.hpp: Likewise.
 256         * include/ext/rope: Likewise.
 257         * include/ext/slist: Likewise.
 258         * include/ext/vstring.h: Likewise.
 259         * include/profile/array: Likewise.
 260         * include/std/array: Likewise.
 261         * include/tr1/array: Likewise.
 262         * include/tr1/hashtable.h: Likewise.
 263         * include/tr1/regex: Likewise.
 264         * include/tr2/dynamic_bitset: Likewise.
 265         * include/bits/alloc_traits.h: Add nodiscard attribute to
 266         allocate.
 267         * include/experimental/memory_resource: Likewise.
 268         * include/ext/alloc_traits.h: Likewise.
 269         * include/ext/array_allocator.h: Likewise.
 270         * include/ext/bitmap_allocator.h: Likewise.
 271         * include/ext/debug_allocator.h: Likewise.
 272         * include/ext/extptr_allocator.h: Likewise.
 273         * include/ext/mt_allocator.h: Likewise.
 274         * include/ext/new_allocator.h: Likewise.
 275         * include/ext/pool_allocator.h: Likewise.
 276         * include/ext/throw_allocator.h: Likewise.
 277         * include/std/scoped_allocator: Likewise.
 278         * libsupc++/eh_alloc.cc: Likewise.
 279         * include/std/future: Add nodiscard attribute to async.
 280         * libsupc++/new: Add nodiscard attribute to new.
 281
 282 2019-01-18  Jonathan Wakely  <jwakely@redhat.com>
 283
 284         PR libstdc++/87514
 285         PR libstdc++/87520
 286         PR libstdc++/88782
 287         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Export new symbol.
 288         * include/bits/shared_ptr.h
 289         (shared_ptr(_Sp_make_shared_tag, const Alloc&, Args&&...))
 290         (allocate_shared): Change to use new tag type.
 291         * include/bits/shared_ptr_base.h (_Sp_make_shared_tag::_S_eq):
 292         Declare new member function.
 293         (_Sp_alloc_shared_tag): Define new type.
 294         (_Sp_counted_ptr_inplace): Declare __shared_count<_Lp> as a friend.
 295         (_Sp_counted_ptr_inplace::_M_get_deleter) [!__cpp_rtti]: Use
 296         _Sp_make_shared_tag::_S_eq to check type_info.
 297         (__shared_count(Ptr, Deleter),__shared_count(Ptr, Deleter, Alloc)):
 298         Constrain to prevent being called with _Sp_alloc_shared_tag.
 299         (__shared_count(_Sp_make_shared_tag, const _Alloc&, Args&&...)):
 300         Replace constructor with ...
 301         (__shared_count(Tp*&, _Sp_alloc_shared_tag<_Alloc>, Args&&...)): Use
 302         reference parameter so address of the new object can be returned to
 303         the caller. Obtain the allocator from the tag type.
 304         (__shared_ptr(_Sp_make_shared_tag, const Alloc&, Args&&...)): Replace
 305         constructor with ...
 306         (__shared_ptr(_Sp_alloc_shared_tag<Alloc>, Args&&...)): Pass _M_ptr
 307         to the __shared_count constructor.
 308         (__allocate_shared): Change to use new tag type.
 309         * src/c++11/shared_ptr.cc (_Sp_make_shared_tag::_S_eq): Define.
 310
 311 2019-01-17  Jonathan Wakely  <jwakely@redhat.com>
 312
 313         * src/c++17/fs_ops.cc
 314         (equivalent(const path&, const path&, error_code&))
 315         [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Use GetFileInformationByHandle to
 316         compare files instead of relying on incomplete info returned by stat.
 317
 318         PR libstdc++/88884
 319         * src/c++17/fs_ops.cc (absolute(const path&, error_code&)): Do nothing
 320         if the path is already absolute.
 321         [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Normalize root-directory.
 322         [!_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Pass error_code to current_path.
 323
 324         PR libstdc++/88881
 325         * src/c++17/fs_ops.cc (canonical(const path&, error_code&))
 326         [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Normalize path, to match behaviour
 327         of filesystem::exists.
 328         (create_directories(const path&, error_code&)): Add assertions.
 329         (status(const path&, error_code&)) [_GLIBCXX_FILESYSTEM_IS_WINDOWS]:
 330         Add workaround for bug in _wstat for paths with trailing slash.
 331         * testsuite/27_io/filesystem/operations/create_directories.cc: Adjust
 332         for expected behaviour on mingw.
 333         * testsuite/experimental/filesystem/operations/create_directories.cc:
 334         Likewise.
 335         * testsuite/27_io/filesystem/operations/temp_directory_path.cc: Use
 336         "TMP" instead of "TMPDIR" and clean environment before each test. Do
 337         not test permissions on mingw targets.
 338
 339 2019-01-16  Jonathan Wakely  <jwakely@redhat.com>
 340
 341         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Add exports for fstream
 342         constructors and open members taking wide strings. Fix patterns for
 343         filesystem::path members to match wstring_view parameters. Add
 344         exports for shared_ptr members used by directory iterators.
 345         * src/c++17/fs_ops.cc (remove(const path&, error_code&)): Clear the
 346         error code parameter if the file doesn't exist.
 347         * src/filesystem/ops.cc (remove(const path&, error_code&)):
 348         Likewise.
 349         * testsuite/27_io/filesystem/operations/canonical.cc: Fix expected
 350         values for mingw targets, where "/" is not an absolute path. Do not
 351         test symlinks on mingw targets.
 352         * testsuite/experimental/filesystem/operations/canonical.cc: Likewise.
 353         * testsuite/27_io/filesystem/operations/copy.cc: Do not test symlinks
 354         on mingw targets.
 355         * testsuite/experimental/filesystem/operations/copy.cc: Likewise.
 356         * testsuite/27_io/filesystem/operations/create_directories.cc: Check
 357         that each component of the path is created.
 358         * testsuite/experimental/filesystem/operations/create_directories.cc:
 359         Likewise.
 360         * testsuite/27_io/filesystem/operations/exists.cc: Do not test
 361         permissions on mingw targets.
 362         * testsuite/experimental/filesystem/operations/exists.cc: Likewise.
 363         * testsuite/27_io/filesystem/operations/is_empty.cc: Likewise.
 364         * testsuite/experimental/filesystem/operations/is_empty.cc: Likewise.
 365         * testsuite/27_io/filesystem/operations/permissions.cc: XFAIL for
 366         mingw targets.
 367         * testsuite/experimental/filesystem/operations/permissions.cc:
 368         Likewise.
 369         * testsuite/27_io/filesystem/operations/remove.cc: Do not test
 370         symlinks or permissions on mingw targets.
 371         * testsuite/experimental/filesystem/operations/remove.cc: Likewise.
 372         * testsuite/27_io/filesystem/operations/remove_all.cc: Do not test
 373         symlinks on mingw targets.
 374         * testsuite/experimental/filesystem/operations/remove_all.cc:
 375         Likewise.
 376         * testsuite/27_io/filesystem/operations/status.cc: Do not test
 377         permissions on mingw targets.
 378         * testsuite/27_io/filesystem/operations/weakly_canonical.cc: Do not
 379         test symlinks on mingw targets.
 380         * testsuite/experimental/filesystem/operations/space.cc: Fix test
 381         for mingw targets.
 382
 383 2019-02-14  Ulrich Drepper  <drepper@redhat.com>
 384
 385         PR libstdc++/88738
 386         Warn about unused comparisons of shared_ptr/unique_ptr
 387         * include/bits/c++config [_GLIBCXX_NODISCARD]: Define.
 388         * include/bits/shared_ptr.h: Use it for operator ==, !=,
 389         <, <=, >, >= for shared_ptr.
 390         * include/bits/unique_ptr.h: Likewise for unique_ptr.
 391
 392 2019-01-15  Jonathan Wakely  <jwakely@redhat.com>
 393
 394         * include/bits/shared_ptr_base.h (__cpp_lib_shared_ptr_arrays): Define
 395         as 201611L, because P0497R0 changes are supported.
 396         * include/std/version (__cpp_lib_shared_ptr_arrays): Likewise.
 397
 398         * include/bits/erase_if.h [__cplusplus > 201703L]
 399         (__cpp_lib_erase_if): Only define for C++2a.
 400         * include/std/iterator [__cplusplus >= 201402L && !_GLIBCXX_DEBUG]
 401         (__cpp_lib_null_iterators): Define.
 402         * include/std/version [__cplusplus >= 201402L && !_GLIBCXX_DEBUG]
 403         (__cpp_lib_null_iterators): Define.
 404         [__cpp_impl_destroying_delete] (__cpp_lib_destroying_delete): Define.
 405
 406         * doc/xml/manual/status_cxx2017.xml: Document P0032R3 and P0307R2
 407         status.
 408         * include/bits/stl_uninitialized.h (__cpp_lib_raw_memory_algorithms):
 409         Define.
 410         * include/std/any (__cpp_lib_any): Define as 201606L, because P0032R3
 411         changes are supported.
 412         * include/std/optional (__cpp_lib_optional): Likewise.
 413         * include/std/variant (__cpp_lib_variant): Likewise.
 414         * include/std/version [!__STRICT_ANSI__]
 415         (__cpp_lib_uncaught_exceptions): Define as long integer.
 416         [__cplusplus >= 201703L] (__cpp_lib_any)
 417         (__cpp_lib_raw_memory_algorithms, __cpp_lib_uncaught_exceptions)
 418         (__cpp_lib_variant): Define for C++17.
 419         [__cplusplus >= 201703L] (__cpp_lib_optional): Update value and define
 420         as long integer.
 421         * libsupc++/exception (__cpp_lib_uncaught_exceptions): Define as long
 422         integer.
 423
 424         * doc/xml/manual/status_cxx2020.xml: Update P1123R0 status.
 425
 426 2019-01-12  Jonathan Wakely  <jwakely@redhat.com>
 427
 428         PR libstdc++/88811
 429         PR libstdc++/83306
 430         * src/filesystem/path.cc: Fix typo. If first path is empty, show []
 431         before second path.
 432         * testsuite/experimental/filesystem/filesystem_error/cons.cc: New
 433         test.
 434
 435 2019-01-11  Jonathan Wakely  <jwakely@redhat.com>
 436
 437         * doc/xml/manual/intro.xml: Include new section.
 438         * doc/xml/manual/status_cxx2017.xml: Document more
 439         implementation-defined properties of the library.
 440         * doc/xml/manual/status_cxx2020.xml: Document C++2a status.
 441         * doc/html/*: Regenerate.
 442
 443         * include/bits/refwrap.h [__cplusplus > 201703L]
 444         (_Refwrap_base_arg1, _Refwrap_base_arg2, _Reference_wrapper_base)
 445         (_Reference_wrapper_base_memfun): Do not define for C++2a.
 446         (reference_wrapper): Do not derive from _Reference_wrapper_base_memfun
 447         for C++2a.
 448         (reference_wrapper::operator()): Add static assertion.
 449         * testsuite/20_util/reference_wrapper/incomplete.cc: New test.
 450
 451         * include/std/chrono (duration_values::zero(), duration_values::min())
 452         (duration_values::max()): Add noexcept.
 453         (duration::zero(), duration::min(), duration::max()): Likewise.
 454         (time_point::zero(), time_point::min(), time_point::max()): Likewise.
 455         * testsuite/20_util/duration/requirements/noexcept.cc: New test.
 456         * testsuite/20_util/time_point/requirements/noexcept.cc: New test.
 457
 458         * include/std/version (__cpp_lib_erase_if): Move to C++20 group.
 459
 460 2019-01-11  Jakub Jelinek  <jakub@redhat.com>
 461
 462         * include/std/type_traits (__cpp_lib_is_constant_evaluated): Define.
 463         * include/std/version (__cpp_lib_is_constant_evaluated): Define.
 464
 465 2019-01-11  Jonathan Wakely  <jwakely@redhat.com>
 466
 467         PR libstdc++/88802
 468         * include/bits/functional_hash.h (hash<nullptr_t>): Define
 469         specialization for C++17 (P0513R0, LWG 2817).
 470         * testsuite/20_util/hash/nullptr.cc: New test.
 471
 472         PR libstdc++/88125
 473         * config/abi/pre/gnu.ver (GLIBCXX_3.4.6): Remove unused duplicate
 474         pattern for std::basic_stringbuf::str().
 475
 476         * config/abi/pre/gnu.ver (GLIBCXX_3.4): Correct recent changes to
 477         basic_ostream::operator<< patterns.
 478
 479 2019-01-10  Jonathan Wakely  <jwakely@redhat.com>
 480
 481         * testsuite/27_io/filesystem/operations/last_write_time.cc: Fix
 482         test failures on targets with 32-bit time_t.
 483
 484         * include/bits/erase_if.h: Define __cpp_lib_erase_if.
 485         * include/std/deque: Likewise.
 486         * include/std/forward_list: Likewise.
 487         * include/std/list: Likewise.
 488         * include/std/string: Likewise.
 489         * include/std/vector: Likewise.
 490         * include/std/version: Likewise.
 491         * testsuite/21_strings/basic_string/erasure.cc: Test macro.
 492         * testsuite/23_containers/deque/erasure.cc: Likewise.
 493         * testsuite/23_containers/forward_list/erasure.cc: Likewise.
 494         * testsuite/23_containers/list/erasure.cc: Likewise.
 495         * testsuite/23_containers/map/erasure.cc: Likewise.
 496         * testsuite/23_containers/set/erasure.cc: Likewise.
 497         * testsuite/23_containers/unordered_map/erasure.cc: Likewise.
 498         * testsuite/23_containers/unordered_set/erasure.cc: Likewise.
 499         * testsuite/23_containers/vector/erasure.cc: Likewise.
 500
 501         * include/experimental/internet [AI_NUMERICSERV]
 502         (resolver_base::numeric_service): Define conditionally.
 503         * testsuite/experimental/net/internet/resolver/base.cc: Test it
 504         conditionally.
 505         * testsuite/experimental/net/internet/resolver/ops/lookup.cc:
 506         Likewise.
 507
 508 2019-01-10  Ville Voutilainen  <ville.voutilainen@gmail.com>
 509             Jonathan Wakely  <jwakely@redhat.com>
 510
 511         Implement LWG 2221
 512         * config/abi/pre/gnu.ver (GLIBCXX_3.4): Tighten patterns.
 513         (GLIBCXX_3.4.26): Add new exports.
 514         * include/Makefile.am: Add ostream-inst.cc. Move string-inst.cc to
 515         correct list of sources.
 516         * include/Makefile.in: Regenerate.
 517         * include/std/ostream (operator<<(nullptr_t)): New member function.
 518         * src/c++17/ostream-inst.cc: New file.
 519         * testsuite/27_io/basic_ostream/inserters_other/char/lwg2221.cc: New
 520         test.
 521
 522 2019-01-10  Jonathan Wakely  <jwakely@redhat.com>
 523
 524         * testsuite/util/testsuite_fs.h (nonexistent_path): Include name
 525         of the source file containing the caller.
 526         * testsuite/27_io/filesystem/iterators/directory_iterator.cc: Remove
 527         directories created by test.
 528         * testsuite/27_io/filesystem/iterators/recursive_directory_iterator.cc:
 529         Likewise.
 530         * testsuite/experimental/filesystem/iterators/directory_iterator.cc:
 531         Likewise.
 532         * testsuite/experimental/filesystem/iterators/
 533         recursive_directory_iterator.cc: Likewise.
 534
 535 2019-01-10  Jakub Jelinek  <jakub@redhat.com>
 536
 537         PR tree-optimization/88775
 538         * include/bits/stl_function.h (greater<_Tp*>::operator(),
 539         less<_Tp*>::operator(), greater_equal<_Tp*>::operator(),
 540         less_equal<_Tp*>::operator()): Use __builtin_is_constant_evaluated
 541         instead of __builtin_constant_p if available.  Don't bother with
 542         the pointer comparison in C++11 and earlier.
 543
 544 2019-01-09  Sandra Loosemore  <sandra@codesourcery.com>
 545
 546         PR other/16615
 547
 548         * include/ext/bitmap_allocator.h: Mechanically replace "can not"
 549         with "cannot".
 550
 551 2019-01-09  Jonathan Wakely  <jwakely@redhat.com>
 552
 553         * testsuite/libstdc++-prettyprinters/cxx17.cc: Fix expected output
 554         for filesystem::path. Give variables more distinctive names.
 555
 556         * include/std/optional (_Optional_payload_base::_M_copy_assign): New
 557         member function to perform non-trivial assignment.
 558         (_Optional_payload_base::_M_move_assign): Likewise.
 559         (_Optional_payload<T, true, false, true>::operator=)
 560         (_Optional_payload<T, true, true, false>::operator=)
 561         (_Optional_payload<T, true, false, false>::operator=): Call
 562         _M_copy_assign and/or _M_move_assign to do non-trivial assignments.
 563
 564         PR libstdc++/88204
 565         * testsuite/26_numerics/complex/operators/more_constexpr.cc: Do not
 566         test std::complex<long double> if long double format is IBM128.
 567         * testsuite/26_numerics/complex/requirements/more_constexpr.cc:
 568         Likewise.
 569
 570 2019-01-08  Jonathan Wakely  <jwakely@redhat.com>
 571
 572         * testsuite/libstdc++-prettyprinters/compat.cc: Test printer support
 573         for old std::unique_ptr layout.
 574         * testsuite/libstdc++-prettyprinters/cxx17.cc: Fix std::variant test
 575         to become valueless. Add filesystem::path tests.
 576
 577         PR libstdc++/87855
 578         * include/std/optional (_Optional_payload_base): New class template
 579         for common code hoisted from _Optional_payload specializations. Use
 580         a template for the union, to allow a partial specialization for
 581         types with non-trivial destructors. Add constructors for in-place
 582         initialization to the union.
 583         (_Optional_payload(bool, const _Optional_payload&)): Use _M_construct
 584         to perform non-trivial copy construction, instead of relying on
 585         non-standard copy elision in a delegating constructor.
 586         (_Optional_payload(bool, _Optional_payload&&)): Likewise for
 587         non-trivial move construction.
 588         (_Optional_payload): Derive from _Optional_payload_base and use it
 589         for everything except the non-trivial assignment operators, which are
 590         defined as needed.
 591         (_Optional_payload<false, C, M>): Derive from the specialization
 592         _Optional_payload<true, false, false> and add a destructor.
 593         (_Optional_base_impl::_M_destruct, _Optional_base_impl::_M_reset):
 594         Forward to corresponding members of _Optional_payload.
 595         (_Optional_base_impl::_M_is_engaged, _Optional_base_impl::_M_get):
 596         Hoist common members from _Optional_base.
 597         (_Optional_base): Make all members and base class public.
 598         (_Optional_base::_M_get, _Optional_base::_M_is_engaged): Move to
 599         _Optional_base_impl.
 600         * python/libstdcxx/v6/printers.py (StdExpOptionalPrinter): Add
 601         support for new std::optional layout.
 602         * testsuite/libstdc++-prettyprinters/compat.cc: New test.
 603
 604         PR libstdc++/88066
 605         * include/bits/locale_conv.h: Use <> for includes not "".
 606         * include/ext/random: Likewise.
 607         * include/ext/vstring.h: Likewise.
 608
 609 2019-01-08  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
 610
 611         * config/abi/pre/gnu.ver (GLIBCXX_3.4): Tighten existing patterns.
 612         (GLIBCXX_3.4.21): Likewise.
 613
 614 2019-01-08  Jonathan Wakely  <jwakely@redhat.com>
 615
 616         PR libstdc++/88749
 617         * src/filesystem/ops.cc (last_write_time): Fix preprocessor condition
 618         to match the one that controls whether utimbuf and utime are declared.
 619
 620 2019-01-07  Jonathan Wakely  <jwakely@redhat.com>
 621
 622         PR libstdc++/87787
 623         * include/bits/char_traits.h (char_traits::move): Do not pass null
 624         pointers to memmove.
 625         * include/bits/locale_facets.h
 626         (ctype<char>::widen(const char*, const char*, char*)): Do not
 627         pass null pointers to memcpy.
 628         (ctype<char>::narrow(const char*, const char*, char, char*)):
 629         Likewise.
 630         (ctype<char>::do_widen(const char*, const char*, char*)):
 631         Likewise.
 632         (ctype<char>::do_narrow(const char*, const char*, char, char*)):
 633         Likewise.
 634
 635         * doc/xml/manual/spine.xml: Update copyright years.
 636         * doc/xml/manual/status_cxx2017.xml: Adjust note about -lstdc++fs.
 637         * doc/xml/manual/using.xml: Remove requirement to link with -lstdc++fs
 638         for C++17 filesystem library.
 639         * doc/html/*: Regenerate.
 640
 641         * acinclude.m4 (GLIBCXX_CHECK_FILESYSTEM_DEPS): Check for truncate.
 642         * config.h.in: Regenerate.
 643         * config/abi/pre/gnu.ver: Order patterns for filesystem operations
 644         alphabetically and add missing entries for copy_symlink,
 645         hard_link_count, rename, and resize_file.
 646         * configure: Regenerate.
 647         * src/c++17/fs_ops.cc (resize_file): Remove #if so posix::truncate is
 648         used unconditionally.
 649         * src/filesystem/ops-common.h (__gnu_posix::truncate)
 650         [!_GLIBCXX_HAVE_TRUNCATE]: Provide fallback definition that only
 651         supports truncating to zero length.
 652         * testsuite/27_io/filesystem/operations/all.cc: New test.
 653         * testsuite/27_io/filesystem/operations/resize_file.cc: New test.
 654
 655 2019-01-06  Jonathan Wakely  <jwakely@redhat.com>
 656
 657         PR libstdc++/86756
 658         * acinclude.m4 (GLIBCXX_CHECK_FILESYSTEM_DEPS): Check for utime and
 659         lstat and define _GLIBCXX_USE_UTIME and _GLIBCXX_USE_LSTAT.
 660         * config.h.in: Regenerate.
 661         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Export symbols for
 662         remaining std::filesystem types and functions.
 663         * configure: Regenerate.
 664         * src/c++17/Makefile.am: Add C++17 filesystem sources.
 665         * src/c++17/Makefile.in: Regenerate.
 666         * src/c++17/cow-fs_dir.cc: Move src/filesystem/cow-std-dir.cc to
 667         here, and change name of included file.
 668         * src/c++17/cow-fs_ops.cc: Move src/filesystem/cow-std-ops.cc to
 669         here, and change name of included file.
 670         * src/c++17/fs_dir.cc: Move src/filesystem/std-dir.cc to here. Change
 671         path to dir-common.h.
 672         * src/c++17/fs_ops.cc: Move src/filesystem/std-ops.cc to here. Change
 673         path to ops-common.h. Disable -Wunused-parameter warnings.
 674         (internal_file_clock): Define unconditionally.
 675         [!_GLIBCXX_HAVE_SYS_STAT_H] (internal_file_clock::from_stat): Do not
 676         define.
 677         (do_copy_file, do_space): Move definitions to ops.common.h.
 678         (copy, file_size, hard_link_count, last_write_time, space): Only
 679         perform operation when _GLIBCXX_HAVE_SYS_STAT_H is defined, otherwise
 680         report an error.
 681         (last_write_time, read_symlink): Remove unused attributes from
 682         parameters.
 683         * src/filesystem/Makefile.am: Remove C++17 filesystem sources.
 684         * src/filesystem/Makefile.in: Regenerate.
 685         * src/filesystem/cow-std-dir.cc: Move to src/c++17/cow-fs_dir.cc.
 686         * src/filesystem/cow-std-ops.cc: Move to src/c++17/cow-fs_ops.cc.
 687         * src/filesystem/std-dir.cc: Move to src/c++17/fs_dir.cc.
 688         * src/filesystem/std-ops.cc: Move to src/c++17/fs_ops.cc.
 689         * src/filesystem/dir-common.h [!_GLIBCXX_HAVE_DIRENT_H]: Define
 690         dummy types and functions instead of using #error.
 691         * src/filesystem/dir.cc [!_GLIBCXX_HAVE_DIRENT_H]: Use #error.
 692         * src/filesystem/ops-common.h [!_GLIBCXX_USE_LSTAT] (lstat): Define
 693         in terms of stat.
 694         [!_GLIBCXX_HAVE_UNISTD_H]: Define dummy types and functions.
 695         (do_copy_file, do_space): Move definitions here from std-ops.cc.
 696         * src/filesystem/ops.cc: Adjust calls to do_copy_file and do_space
 697         to account for new namespace.
 698         * testsuite/27_io/filesystem/directory_entry/86597.cc: Remove
 699         -lstdc++fs from dg-options.
 700         * testsuite/27_io/filesystem/directory_entry/lwg3171.cc: Likewise.
 701         * testsuite/27_io/filesystem/file_status/1.cc: Likewise.
 702         * testsuite/27_io/filesystem/filesystem_error/cons.cc: Likewise.
 703         * testsuite/27_io/filesystem/filesystem_error/copy.cc: Likewise.
 704         * testsuite/27_io/filesystem/iterators/directory_iterator.cc:
 705         Likewise.
 706         * testsuite/27_io/filesystem/iterators/pop.cc: Likewise.
 707         * testsuite/27_io/filesystem/iterators/recursive_directory_iterator.cc:
 708         Likewise.
 709         * testsuite/27_io/filesystem/operations/absolute.cc: Likewise.
 710         * testsuite/27_io/filesystem/operations/canonical.cc: Likewise.
 711         * testsuite/27_io/filesystem/operations/copy.cc: Likewise.
 712         * testsuite/27_io/filesystem/operations/copy_file.cc: Likewise.
 713         * testsuite/27_io/filesystem/operations/create_directories.cc:
 714         Likewise.
 715         * testsuite/27_io/filesystem/operations/create_directory.cc: Likewise.
 716         * testsuite/27_io/filesystem/operations/create_symlink.cc: Likewise.
 717         * testsuite/27_io/filesystem/operations/current_path.cc: Likewise.
 718         * testsuite/27_io/filesystem/operations/equivalent.cc: Likewise.
 719         * testsuite/27_io/filesystem/operations/exists.cc: Likewise.
 720         * testsuite/27_io/filesystem/operations/file_size.cc: Likewise.
 721         * testsuite/27_io/filesystem/operations/is_empty.cc: Likewise.
 722         * testsuite/27_io/filesystem/operations/last_write_time.cc: Likewise.
 723         * testsuite/27_io/filesystem/operations/permissions.cc: Likewise.
 724         * testsuite/27_io/filesystem/operations/proximate.cc: Likewise.
 725         * testsuite/27_io/filesystem/operations/read_symlink.cc: Likewise.
 726         * testsuite/27_io/filesystem/operations/relative.cc: Likewise.
 727         * testsuite/27_io/filesystem/operations/remove.cc: Likewise.
 728         * testsuite/27_io/filesystem/operations/remove_all.cc: Likewise.
 729         * testsuite/27_io/filesystem/operations/space.cc: Likewise.
 730         * testsuite/27_io/filesystem/operations/status.cc: Likewise.
 731         * testsuite/27_io/filesystem/operations/symlink_status.cc: Likewise.
 732         * testsuite/27_io/filesystem/operations/temp_directory_path.cc:
 733         Likewise.
 734         * testsuite/27_io/filesystem/operations/weakly_canonical.cc: Likewise.
 735
 736
 737         PR libstdc++/86756
 738         * config/abi/pre/gnu.ver (GLIBCXX_3.4): Make various patterns for
 739         typeinfo and vtables less greedy.
 740         (GLIBCXX_3.4.26): Export symbols for std::filesystem::path.
 741         * src/c++17/Makefile.am: Add fs_path.cc and cow-fs_path.cc.
 742         * src/c++17/Makefile.in: Regenerate.
 743         * src/c++17/cow-fs_path.cc: Move src/filesystem/cow-std-path.cc to
 744         here, and change name of included file.
 745         * src/c++17/fs_path.cc: Move src/filesystem/std-path.cc to here.
 746         * src/filesystem/Makefile.am: Remove std-path.cc and cow-std-path.cc
 747         from sources.
 748         * src/filesystem/Makefile.in: Regenerate.
 749         * src/filesystem/cow-std-path.cc: Move to src/c++17/cow-fs_path.cc.
 750         * src/filesystem/std-path.cc: Move to src/c++17/fs_path.cc.
 751         * testsuite/27_io/filesystem/path/append/path.cc: Remove -lstdc++fs
 752         from dg-options and remove dg-require-filesystem-ts.
 753         * testsuite/27_io/filesystem/path/append/source.cc: Likewise.
 754         * testsuite/27_io/filesystem/path/assign/assign.cc: Likewise.
 755         * testsuite/27_io/filesystem/path/assign/copy.cc: Likewise.
 756         * testsuite/27_io/filesystem/path/compare/compare.cc: Likewise.
 757         * testsuite/27_io/filesystem/path/compare/lwg2936.cc: Likewise.
 758         * testsuite/27_io/filesystem/path/compare/path.cc: Likewise.
 759         * testsuite/27_io/filesystem/path/compare/strings.cc: Likewise.
 760         * testsuite/27_io/filesystem/path/concat/path.cc: Likewise.
 761         * testsuite/27_io/filesystem/path/concat/strings.cc: Likewise.
 762         * testsuite/27_io/filesystem/path/construct/80762.cc: Likewise.
 763         * testsuite/27_io/filesystem/path/construct/copy.cc: Likewise.
 764         * testsuite/27_io/filesystem/path/construct/default.cc: Likewise.
 765         * testsuite/27_io/filesystem/path/construct/format.cc: Likewise.
 766         * testsuite/27_io/filesystem/path/construct/locale.cc: Likewise.
 767         * testsuite/27_io/filesystem/path/construct/range.cc: Likewise.
 768         * testsuite/27_io/filesystem/path/construct/string_view.cc: Likewise.
 769         * testsuite/27_io/filesystem/path/decompose/extension.cc: Likewise.
 770         * testsuite/27_io/filesystem/path/decompose/filename.cc: Likewise.
 771         * testsuite/27_io/filesystem/path/decompose/parent_path.cc: Likewise.
 772         * testsuite/27_io/filesystem/path/decompose/relative_path.cc: Likewise.
 773         * testsuite/27_io/filesystem/path/decompose/root_directory.cc:
 774         Likewise.
 775         * testsuite/27_io/filesystem/path/decompose/root_name.cc: Likewise.
 776         * testsuite/27_io/filesystem/path/decompose/root_path.cc: Likewise.
 777         * testsuite/27_io/filesystem/path/decompose/stem.cc: Likewise.
 778         * testsuite/27_io/filesystem/path/generation/normal.cc: Likewise.
 779         * testsuite/27_io/filesystem/path/generation/normal2.cc: Likewise.
 780         * testsuite/27_io/filesystem/path/generation/proximate.cc: Likewise.
 781         * testsuite/27_io/filesystem/path/generation/relative.cc: Likewise.
 782         * testsuite/27_io/filesystem/path/generic/generic_string.cc: Likewise.
 783         * testsuite/27_io/filesystem/path/itr/components.cc: Likewise.
 784         * testsuite/27_io/filesystem/path/itr/traversal.cc: Likewise.
 785         * testsuite/27_io/filesystem/path/modifiers/clear.cc: Likewise.
 786         * testsuite/27_io/filesystem/path/modifiers/make_preferred.cc:
 787         Likewise.
 788         * testsuite/27_io/filesystem/path/modifiers/remove_filename.cc:
 789         Likewise.
 790         * testsuite/27_io/filesystem/path/modifiers/replace_extension.cc:
 791         Likewise.
 792         * testsuite/27_io/filesystem/path/modifiers/replace_filename.cc:
 793         Likewise.
 794         * testsuite/27_io/filesystem/path/modifiers/swap.cc: Likewise.
 795         * testsuite/27_io/filesystem/path/native/string.cc: Likewise.
 796         * testsuite/27_io/filesystem/path/nonmember/append.cc: Likewise.
 797         * testsuite/27_io/filesystem/path/nonmember/hash_value.cc: Likewise.
 798         * testsuite/27_io/filesystem/path/query/empty.cc: Likewise.
 799         * testsuite/27_io/filesystem/path/query/has_extension.cc: Likewise.
 800         * testsuite/27_io/filesystem/path/query/has_filename.cc: Likewise.
 801         * testsuite/27_io/filesystem/path/query/has_parent_path.cc: Likewise.
 802         * testsuite/27_io/filesystem/path/query/has_relative_path.cc: Likewise.
 803         * testsuite/27_io/filesystem/path/query/has_root_directory.cc:
 804         Likewise.
 805         * testsuite/27_io/filesystem/path/query/has_root_name.cc: Likewise.
 806         * testsuite/27_io/filesystem/path/query/has_root_path.cc: Likewise.
 807         * testsuite/27_io/filesystem/path/query/has_stem.cc: Likewise.
 808         * testsuite/27_io/filesystem/path/query/is_absolute.cc: Likewise.
 809         * testsuite/27_io/filesystem/path/query/is_relative.cc: Likewise.
 810
 811         PR libstdc++/87431
 812         * include/std/variant (_Variant_storage<true, _Types...>::_M_valid):
 813         Check is_trivially_copyable instead of is_scalar.
 814         (variant::emplace<N, Args>(Args&&...)): If construction of the new
 815         contained value can throw and its type is trivially copyable then
 816         construct into a temporary variant and move from it, to provide the
 817         strong exception safety guarantee.
 818         (variant::emplace<N, U, Args>(initializer_list<U>, Args&&...)):
 819         Likewise.
 820         * testsuite/20_util/variant/87431.cc: New test.
 821         * testsuite/20_util/variant/run.cc: Adjust test so that throwing
 822         conversion causes valueless state.
 823
 824         PR libstdc++/88607
 825         * testsuite/17_intro/headers/c++1998/charset.cc: New test.
 826         * testsuite/17_intro/headers/c++2011/charset.cc: New test.
 827         * testsuite/17_intro/headers/c++2014/charset.cc: New test.
 828         * testsuite/17_intro/headers/c++2017/charset.cc: New test.
 829         * testsuite/17_intro/headers/c++2020/charset.cc: New test.
 830
 831 2019-01-05  Jonathan Wakely  <jwakely@redhat.com>
 832
 833         * include/bits/fs_fwd.h (__file_clock): Define new clock.
 834         (file_time_type): Redefine in terms of __file_clock.
 835         * src/filesystem/ops-common.h (file_time): Add FIXME comment about
 836         overflow.
 837         * src/filesystem/std-ops.cc (is_set(perm_options, perm_options)): Give
 838         internal linkage.
 839         (internal_file_lock): New helper type for accessing __file_clock.
 840         (do_copy_file): Use internal_file_lock to convert system time to
 841         file_time_type.
 842         (last_write_time(const path&, error_code&)): Likewise.
 843         (last_write_time(const path&, file_time_type, error_code&)): Likewise.
 844
 845 2019-01-04  Jonathan Wakely  <jwakely@redhat.com>
 846
 847         * config/abi/pre/gnu.ver (GLIBCXX_3.4.21): Make patterns less greedy
 848         for const member functions of std::basic_string.
 849         (GLIBCXX_3.4.26): Export member functions of std::basic_string added
 850         in C++17.
 851         * include/bits/basic_string.h (basic_string(__sv_wrapper, const A&)):
 852         Make non-standard constructor private.
 853         [!_GLIBCXX_USE_CXX11_ABI] (basic_string(__sv_wrapper, const A&)):
 854         Likewise.
 855         * include/bits/basic_string.tcc (std::string, std::wstring): Declare
 856         explicit instantiations for C++17 as well as earlier dialects.
 857         * src/c++17/Makefile.am: Add new source files.
 858         * src/c++17/Makefile.in: Regenerate.
 859         * src/c++17/cow-string-inst.cc: New file defining explicit
 860         instantiations for basic_string member functions added in C++17.
 861         * src/c++17/string-inst.cc: Likewise.
 862
 863         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Export allocator-extended
 864         copy/move constructors for old std::basic_string.
 865         * include/bits/basic_string.h [!_GLIBCXX_USE_CXX11_ABI]
 866         (basic_string::reference, basic_string::const_reference): Define
 867         as plain references for C++11 and later.
 868         (basic_string::basic_string()): Put constructor body outside
 869         preprocessor conditional groups.
 870         (basic_string::basic_string(basic_string&&)): Move _Alloc_hider
 871         instead of copying it.
 872         (basic_string::basic_string(const basic_string&, const _Alloc&)):
 873         Define.
 874         (basic_string::basic_string(basic_string&&, const _Alloc&)):
 875         Define.
 876         * include/bits/fs_path.h [!_GLIBCXX_USE_CXX11_ABI]: Remove special
 877         cases for old basic_string.
 878         * testsuite/21_strings/basic_string/cons/char/8.cc: Test
 879         allocator-extended constructors unconditionally. Add extra members to
 880         allocator type when using old string ABI.
 881         * testsuite/21_strings/basic_string/allocator/71964.cc: Enable test
 882         for old string ABI.
 883         * testsuite/21_strings/basic_string/cons/wchar_t/8.cc: Likewise.
 884
 885         * testsuite/23_containers/list/61347.cc: Avoid spurious failure when
 886         -fno-inline added to test flags.
 887
 888         * testsuite/21_strings/basic_string/requirements/
 889         explicit_instantiation/debug.cc: Remove XFAIL for old ABI.
 890
 891         * testsuite/27_io/filesystem/filesystem_error/copy.cc: Fix static
 892         assertion failures with old std::string ABI.
 893
 894         * include/bits/fs_path.h (path::_List::erase): Replace both overloads
 895         with ...
 896         (path::pop_back(), path::_M_erase_from(const_iterator)): New member
 897         functions that will only erase elements at the end.
 898         * src/filesystem/std-path.cc (path::_List::_Impl::pop_back()): Define.
 899         (path::_List::_Impl::_M_erase_from(const_iterator)): Define.
 900         (path::_List::operator=(const _List&)): Use _M_erase_from(p) instead
 901         of erase(p, end()).
 902         (path::_List::pop_back()): Define.
 903         (path::_List::_M_erase_from(const_iterator)): Define.
 904         (path::operator/=(const path&)): Use pop_back to remove last component
 905         and _M_erase_from to remove multiple components.
 906         (path::_M_append(basic_string_view<value_type>)): Likewise.
 907         (path::operator+=(const path&)): Likewise.
 908         (path::_M_concat(basic_string_view<value_type>)): Likewise.
 909         (path::remove_filename()): Likewise.
 910         (path::lexically_normal()): Use _List::_Impl iterators instead of
 911         path::iterator. Use pop_back to remove components from the end. Clear
 912         trailing filename, instead of using erase(const_iterator) to remove
 913         a non-final component.
 914         * testsuite/27_io/filesystem/path/generation/normal.cc: Test
 915         additional cases.
 916         * testsuite/27_io/filesystem/path/generation/normal2.cc: New test.
 917
 918         * src/filesystem/std-path.cc (path::operator+=(const path&)): Fix
 919         incorrect treatment of empty filename after trailing slash.
 920         * testsuite/27_io/filesystem/path/concat/path.cc: Test problem case.
 921
 922         * testsuite/21_strings/basic_string/modifiers/assign/char/
 923         move_assign_optim.cc: Avoid spurious failure when -fno-inline added
 924         to test flags.
 925         * testsuite/21_strings/basic_string/modifiers/assign/wchar_t/
 926         move_assign_optim.cc: Likewise.
 927
 928 2019-01-03  Jonathan Wakely  <jwakely@redhat.com>
 929             Jakub Jelinek  <jakub@redhat.com>
 930
 931         PR libstdc++/88607
 932         * include/experimental/memory: Replace UTF-8 quote characters.
 933         * include/std/future: Replace UTF-8 "em dash" characters.
 934
 935 2019-01-03  Jonathan Wakely  <jwakely@redhat.com>
 936
 937         PR libstdc++/88607
 938         * include/bits/forward_list.h: Replace UTF-8 "ligature fi" character.
 939         * include/debug/forward_list: Likewise.
 940         * include/experimental/bits/shared_ptr.h: Remove UTF-8 "section sign"
 941         character.
 942         * include/experimental/chrono: Likewise.
 943         * include/experimental/functional: Likewise.
 944         * include/experimental/ratio: Likewise.
 945         * include/experimental/system_error: Likewise.
 946         * include/experimental/tuple: Likewise.
 947         * include/experimental/type_traits: Likewise.
 948         * include/parallel/workstealing.h: Replace UTF-8 "en dash" character.
 949         * include/parallel/multiseq_selection.h: Likewise.
 950
 951         PR libstdc++/88681
 952         * config/abi/pre/gnu.ver: Add missing exports.
 953         * testsuite/22_locale/collate_byname/88681.cc: New test.
 954         * testsuite/22_locale/time_get/get/char/88681.cc: New test.
 955         * testsuite/22_locale/time_get/get/wchar_t/88681.cc: New test.
 956
 957 2019-01-02  Jonathan Wakely  <jwakely@redhat.com>
 958
 959         * testsuite/23_containers/map/cons/deduction.cc: Test deduction from
 960         initializer_list<value_type> and from input iterator ranges.
 961         * testsuite/23_containers/multimap/cons/deduction.cc: Likewise.
 962
 963         * testsuite/experimental/string_view/element_access/char/empty.cc:
 964         Fix year range in copyright header.
 965
 966 2019-01-02  Joel Brobecker  <brobecker@adacore.com>
 967
 968         * testsuite/21_strings/basic_string_view/element_access/char/empty.cc:
 969         Fix year range in copyright header.
 970
 971 2019-01-01  Jakub Jelinek  <jakub@redhat.com>
 972
 973         Update copyright years.
 974 \f
 975 Copyright (C) 2019 Free Software Foundation, Inc.
 976
 977 Copying and distribution of this file, with or without modification,
 978 are permitted in any medium without royalty provided the copyright
 979 notice and this notice are preserved.