libstdc++-v3/ChangeLog

   1 2019-07-05  Jonathan Wakely  <jwakely@redhat.com>
   2
   3         * include/ext/atomicity.h [_GLIBCXX_ATOMIC_BUILTINS] (__atomic_add)
   4         (__exchange_and_add): Replace static specifier with always_inline
   5         attribute.
   6         (__exchange_and_add_single, __atomic_add_single): Likewise.
   7         (__exchange_and_add_dispatch, __atomic_add_dispatch): Likewise. Also
   8         combine !__gthread_active_p() and !__GTHREADS branches.
   9
  10 2019-07-03  Jonathan Wakely  <jwakely@redhat.com>
  11
  12         PR libstdc++/91067
  13         * acinclude.m4 (libtool_VERSION): Bump to 6:27:0.
  14         * configure: Regenerate.
  15         * config/abi/pre/gnu.ver (GLIBCXX_3.4.27): Add new version. Export
  16         missing symbols.
  17         * testsuite/27_io/filesystem/iterators/91067.cc: New test.
  18         * testsuite/util/testsuite_abi.cc: Add new symbol version.
  19
  20 2019-07-02  Jonathan Wakely  <jwakely@redhat.com>
  21
  22         * include/bits/c++config (_GLIBCXX_HAVE_BUILTIN_LAUNDER)
  23         (_GLIBCXX_HAVE_BUILTIN_IS_CONSTANT_EVALUATED): Use __has_builtin
  24         instead of __is_identifier to detect Clang support.
  25
  26 2019-07-02  Jim Wilson  <jimw@sifive.com>
  27
  28         * configure.ac (BUILD_PDF): Also test for doxygen, dot, xsltproc,
  29         and xmllint.
  30         * configure: Regenerate.
  31
  32 2019-06-27  Jonathan Wakely  <jwakely@redhat.com>
  33
  34         PR libstdc++/91012
  35         * src/c++17/fs_path.cc (filesystem_error::_Impl): Use a string_view
  36         for the what_arg parameters.
  37         (filesystem_error::filesystem_error): Pass system_error::what() to
  38         the _Impl constructor.
  39         * testsuite/27_io/filesystem/filesystem_error/cons.cc: Ensure that
  40         filesystem_error::what() contains system_error::what().
  41
  42 2019-06-26  Jonathan Wakely  <jwakely@redhat.com>
  43
  44         * include/std/charconv (chars_format): Define bitmask type.
  45         * testsuite/20_util/to_chars/chars_format.cc: New test.
  46
  47         * include/bits/fs_path.h (path::__is_encoded_char): Use __is_one_of.
  48         * include/std/bit (_If_is_unsigned_integer_type): Remove.
  49         (_If_is_unsigned_integer): Use __is_unsigned_integer.
  50         (rotl(byte, unsigned), rotr(byte, unsigned), countl_zero(byte))
  51         (countl_one(byte), countr_zero(byte), countr_one(byte))
  52         (popcount(byte), ispow2(byte), ceil2(byte), floor2(byte))
  53         (log2p1(byte)): Remove.
  54         * include/std/charconv (__detail::__is_one_of): Move to <type_traits>.
  55         (__detail::__is_int_to_chars_type): Remove.
  56         (__detail::__integer_to_chars_result_type): Use __is_signed_integer
  57         and __is_unsigned_integer.
  58         * include/std/type_traits (__is_one_of): Move here from <charconv>.
  59         (__is_signed_integer, __is_unsigned_integer): New helpers.
  60         * testsuite/26_numerics/bit/bit.pow.two/ceil2.cc: Remove test for
  61         std::byte overload.
  62         * testsuite/26_numerics/bit/bit.pow.two/floor2.cc: Likewise.
  63         * testsuite/26_numerics/bit/bit.pow.two/ispow2.cc: Likewise.
  64         * testsuite/26_numerics/bit/bit.pow.two/log2p1.cc: Likewise.
  65         * testsuite/26_numerics/bit/bitops.count/countl_one.cc: Likewise.
  66         * testsuite/26_numerics/bit/bitops.count/countl_zero.cc: Likewise.
  67         * testsuite/26_numerics/bit/bitops.count/countr_one.cc: Likewise.
  68         * testsuite/26_numerics/bit/bitops.count/countr_zero.cc: Likewise.
  69         * testsuite/26_numerics/bit/bitops.count/popcount.cc: Likewise.
  70         * testsuite/26_numerics/bit/bitops.rot/rotl.cc: Likewise.
  71         * testsuite/26_numerics/bit/bitops.rot/rotr.cc: Likewise.
  72
  73 2019-06-25  Jonathan Wakely  <jwakely@redhat.com>
  74
  75         * include/std/numeric (midpoint(T, T)): Avoid std::abs in constexpr
  76         function.
  77
  78 2019-06-25  Jakub Jelinek  <jakub@redhat.com>
  79
  80         * include/pstl/pstl_config.h (_PSTL_PRAGMA_SIMD_SCAN,
  81         _PSTL_PRAGMA_SIMD_INCLUSIVE_SCAN, _PSTL_PRAGMA_SIMD_EXCLUSIVE_SCAN):
  82         Define to OpenMP 5.0 pragmas even for GCC 10.0+.
  83         (_PSTL_UDS_PRESENT): Define to 1 for GCC 10.0+.
  84
  85 2019-06-24  Jonathan Wakely  <jwakely@redhat.com>
  86
  87         * include/std/numeric (midpoint(T, T)): Change implementation for
  88         floating-point types to avoid incorrect rounding of denormals.
  89         * testsuite/26_numerics/midpoint/floating.cc: Add check for correct
  90         rounding with denormals.
  91         * testsuite/26_numerics/gcd/gcd_neg.cc: Adjust dg-error line numbers.
  92         * testsuite/26_numerics/lcm/lcm_neg.cc: Likewise.
  93
  94         * testsuite/18_support/headers/cfloat/values_c++17.cc: New test.
  95
  96 2019-06-20  Jonathan Wakely  <jwakely@redhat.com>
  97
  98         * acinclude.m4 (GLIBCXX_ENABLE_DEBUG): Only do debug build for final
  99         stage of bootstrap.
 100         * configure: Regenerate.
 101
 102         * include/std/variant (_Variant_storage, _Extra_visit_slot_needed):
 103         Qualify calls to __never_valueless.
 104
 105         * doc/xml/manual/status_cxx2017.xml: Fix outdated reference to
 106         C++17 working draft.
 107
 108         * testsuite/libstdc++-prettyprinters/simple.cc: Use non-palindromic
 109         vector<bool> for test.
 110         * testsuite/libstdc++-prettyprinters/simple11.cc: Likewise.
 111
 112 2019-06-19  Jonathan Wakely  <jwakely@redhat.com>
 113
 114         * include/bits/stream_iterator.h (istream_iterator::_M_equal()): Make
 115         private.
 116         (istream_iterator::_M_read()): Do not check stream state before
 117         attempting extraction. Set stream pointer to null when extraction
 118         fails (P0738R2).
 119         (operator==(const istream_iterator&, const istream_iterator&)): Change
 120         to be a hidden friend of istream_iterator.
 121         (operator!=(const istream_iterator&, const istream_iterator&)):
 122         Likewise.
 123         (ostream_iterator::ostream_iterator()): Add default constructor.
 124         (ostream_iterator::ostream_iterator(ostream_type*, const C*)): Use
 125         addressof.
 126         * testsuite/24_iterators/istream_iterator/1.cc: New test.
 127         * testsuite/24_iterators/ostream_iterator/1.cc: New test.
 128         * testsuite/24_iterators/ostream_iterator/70766.cc: Also check
 129         constructor taking a string.
 130         * testsuite/24_iterators/ostream_iterator/requirements/constexpr.cc:
 131         New test.
 132
 133 2019-06-19  Michael Weghorn  <m.weghorn@posteo.de>
 134             Jonathan Wakely  <jwakely@redhat.com>
 135
 136         PR libstdc++/90945
 137         * python/libstdcxx/v6/printers.py (StdVectorPrinter._iterator): Use
 138         values of type bool for vector<bool> elements.
 139         * testsuite/libstdc++-prettyprinters/simple.cc: Test vector<bool>.
 140         * testsuite/libstdc++-prettyprinters/simple11.cc: Likewise.
 141
 142 2019-06-19  Jonathan Wakely  <jwakely@redhat.com>
 143
 144         PR libstdc++/90920 partially revert r263433
 145         * include/bits/stl_algo.h (__rotate): Restore checks for empty ranges.
 146         (rotate): Remove checks.
 147         * testsuite/25_algorithms/rotate/90920.cc: New test.
 148
 149         * include/std/numeric (reduce(Iter, Iter, T, BinOp)): Fix value
 150         category used in invocable check.
 151         (reduce(Iter, Iter, T)): Pass initial value as rvalue.
 152         * testsuite/26_numerics/reduce/2.cc: New test.
 153
 154 2019-06-18  Jonathan Wakely  <jwakely@redhat.com>
 155
 156         * include/bits/algorithmfwd.h: Change title of doc group.
 157         * include/bits/stl_algo.h (for_each_n): Add new C++17 algorithm from
 158         P0024R2.
 159         * include/bits/stl_numeric.h: Define doc group and add algos to it.
 160         * include/std/numeric (__is_random_access_iter): New internal trait.
 161         (reduce, transform_reduce, exclusive_scan, inclusive_scan)
 162         (transform_exclusive_scan, transform_inclusive_scan): Likewise.
 163         * testsuite/25_algorithms/for_each/for_each_n.cc: New test.
 164         * testsuite/26_numerics/exclusive_scan/1.cc: New test.
 165         * testsuite/26_numerics/inclusive_scan/1.cc: New test.
 166         * testsuite/26_numerics/reduce/1.cc: New test.
 167         * testsuite/26_numerics/transform_exclusive_scan/1.cc: New test.
 168         * testsuite/26_numerics/transform_inclusive_scan/1.cc: New test.
 169         * testsuite/26_numerics/transform_reduce/1.cc: New test.
 170         * testsuite/util/testsuite_iterators.h (test_container::size()): New
 171         member function.
 172
 173         * include/c_global/cstddef (std::byte): Perform arithmetic operations
 174         in unsigned int to avoid promotion (LWG 2950).
 175
 176 2019-06-17  Jonathan Wakely  <jwakely@redhat.com>
 177
 178         * testsuite/20_util/allocator/1.cc: Add sized delete, which fixes a
 179         failure on AIX.
 180
 181         * include/c_global/cmath (__lerp, lerp): Add noexcept (LWG 3201).
 182
 183         PR libstdc++/90281 Fix string conversions for filesystem::path
 184         * include/bits/fs_path.h (u8path) [_GLIBCXX_FILESYSTEM_IS_WINDOWS]:
 185         Use codecvt_utf8_utf16 instead of codecvt_utf8. Use
 186         __str_codecvt_in_all to fail for partial conversions and throw on
 187         error.
 188         [!_GLIBCXX_FILESYSTEM_IS_WINDOWS && _GLIBCXX_USE_CHAR8_T]
 189         (path::_Cvt<char8_t>): Add explicit specialization.
 190         [_GLIBCXX_FILESYSTEM_IS_WINDOWS] (path::_Cvt::_S_wconvert): Remove
 191         overloads.
 192         [_GLIBCXX_FILESYSTEM_IS_WINDOWS] (path::_Cvt::_S_convert): Use
 193         if-constexpr instead of dispatching to _S_wconvert. Use codecvt
 194         instead of codecvt_utf8. Use __str_codecvt_in_all and
 195         __str_codecvt_out_all.
 196         [!_GLIBCXX_FILESYSTEM_IS_WINDOWS] (path::_Cvt::_S_convert): Use
 197         codecvt instead of codecvt_utf8. Use __str_codecvt_out_all.
 198         (path::_S_str_convert) [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Use
 199         codecvt_utf8_utf16 instead of codecvt_utf8. Construct return values
 200         with allocator. Use __str_codecvt_out_all. Fallthrough to POSIX code
 201         after converting to UTF-8.
 202         (path::_S_str_convert): Use codecvt instead of codecvt_utf8. Use
 203         __str_codecvt_in_all.
 204         (path::string): Fix initialization of string types with different
 205         allocators.
 206         (path::u8string) [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Use
 207         codecvt_utf8_utf16 instead of codecvt_utf8. Use __str_codecvt_out_all.
 208         * include/bits/locale_conv.h (__do_str_codecvt): Reorder static and
 209         runtime conditions.
 210         (__str_codecvt_out_all, __str_codecvt_in_all): New functions that
 211         return false for partial conversions.
 212         * include/experimental/bits/fs_path.h (u8path):
 213         [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Implement correctly for mingw.
 214         [_GLIBCXX_FILESYSTEM_IS_WINDOWS] (path::_Cvt::_S_wconvert): Add
 215         missing handling for char8_t. Use codecvt and codecvt_utf8_utf16
 216         instead of codecvt_utf8. Use __str_codecvt_in_all and
 217         __str_codecvt_out_all.
 218         [!_GLIBCXX_FILESYSTEM_IS_WINDOWS] (path::_Cvt::_S_convert): Use
 219         codecvt instead of codecvt_utf8. Use __str_codecvt_out_all.
 220         (path::string) [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Use
 221         codecvt_utf8_utf16 instead of codecvt_utf8. Construct return values
 222         with allocator. Use __str_codecvt_out_all and __str_codecvt_in_all.
 223         (path::string) [!_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Use
 224         __str_codecvt_in_all.
 225         (path::u8string) [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Use
 226         codecvt_utf8_utf16 instead of codecvt_utf8. Use __str_codecvt_out_all.
 227         * src/c++17/fs_path.cc (path::_S_convert_loc): Use
 228         __str_codecvt_in_all.
 229         * src/filesystem/path.cc (path::_S_convert_loc): Likewise.
 230         * testsuite/27_io/filesystem/path/construct/90281.cc: New test.
 231         * testsuite/27_io/filesystem/path/factory/u8path.cc: New test.
 232         * testsuite/27_io/filesystem/path/native/string.cc: Test with empty
 233         strings and with Unicode characters outside the basic multilingual
 234         plane.
 235         * testsuite/27_io/filesystem/path/native/alloc.cc: New test.
 236         * testsuite/experimental/filesystem/path/construct/90281.cc: New test.
 237         * testsuite/experimental/filesystem/path/factory/u8path.cc: New test.
 238         * testsuite/experimental/filesystem/path/native/alloc.cc: New test.
 239         * testsuite/experimental/filesystem/path/native/string.cc: Test with
 240         empty strings and with Unicode characters outside the basic
 241         multilingual plane.
 242
 243 2019-06-17  François Dumont  <fdumont@gcc.gnu.org>
 244             Jonathan Wakely  <jwakely@redhat.com>
 245
 246         * include/bits/hashtable.h (struct _Hashtable::_Scoped_node): New type.
 247         (_Hashtable::_M_insert_unique_node): Add key_type parameter. Don't
 248         deallocate node if insertion fails.
 249         (_Hashtable::_M_insert_multi_node): Likewise.
 250         (_Hashtable::_M_reinsert_node): Pass additional key argument.
 251         (_Hashtable::_M_reinsert_node_multi): Likewise. Remove FIXME.
 252         (_Hashtable::_M_extract_node(size_t, __node_base*)): New function.
 253         (_Hashtable::extract(const_iterator)): Use _M_extract_node.
 254         (_Hashtable::extract(const _Key&)): Likewise.
 255         (_Hashtable::_M_merge_unique): Pass additional key argument.
 256         (_Hashtable::_M_emplace<Args>(true_type, Args&&...)): Likewise. Use
 257         _Scoped_node.
 258         (_Hashtable::_M_insert): Likewise.
 259         * include/bits/hashtable_policy.h (_Map_base::operator[]): Likewise.
 260         (_Hashtable_alloc): Add comments to functions with misleading names.
 261
 262 2019-06-17  Jonathan Wakely  <jwakely@redhat.com>
 263
 264         * testsuite/20_util/bad_function_call/what.cc: Include <string> header
 265         for std::string.
 266         * testsuite/20_util/shared_ptr/cons/weak_ptr_expired.cc: Likewise.
 267         * testsuite/20_util/tuple/cons/allocator_with_any.cc: Include <memory>
 268         header for std::allocator.
 269         * testsuite/23_containers/array/tuple_interface/tuple_element.cc: Add
 270         using-declaration for std::size_t.
 271         * testsuite/23_containers/array/tuple_interface/tuple_size.cc:
 272         Likewise.
 273         * testsuite/23_containers/deque/cons/55977.cc: Include <istream> for
 274         std::istream.
 275         * testsuite/23_containers/vector/cons/55977.cc: Likewise.
 276         * testsuite/experimental/map/erasure.cc: Include <string> for
 277         std::string.
 278         * testsuite/experimental/unordered_map/erasure.cc: Likewise.
 279
 280 2019-06-14  Jonathan Wakely  <jwakely@redhat.com>
 281
 282         * include/experimental/type_traits (experimental::nonesuch): Use
 283         pragma to disable -Wctor-dtor-privacy warnings.
 284         * include/std/type_traits (__is_convertible_helper<From, To, false>)
 285         (__is_nt_convertible_helper<From, To, false>, __nonesuch): Likewise.
 286
 287         * include/std/version (__cpp_lib_bind_front): Add missing macro.
 288
 289 2019-06-12  Jonathan Wakely  <jwakely@redhat.com>
 290
 291         * include/std/algorithm (__cpp_lib_parallel_algorithm): Fix value.
 292         * include/std/memory (__cpp_lib_parallel_algorithm): Likewise.
 293         * include/std/numeric (__cpp_lib_parallel_algorithm): Likewise.
 294         * testsuite/25_algorithms/pstl/feature_test.cc: New test.
 295
 296         * include/std/variant (get<T>, get<N>, get_if<N>, get_if<T>)
 297         (variant::emplace): Change static_assert messages from "should be"
 298         to "must be".
 299         (hash<monostate>::operator()): Remove name of unused parameter.
 300
 301         * include/std/mutex (scoped_lock::~scoped_lock()): Use fold
 302         expression.
 303
 304         * include/Makefile.am: Add new <bits/charconv.h> header.
 305         * include/Makefile.in: Regenerate.
 306         * include/bits/basic_string.h (to_string(int), to_string(unsigned))
 307         (to_string(long), to_string(unsigned long), to_string(long long))
 308         (to_string(unsigned long long)): Rewrite to use __to_chars_10_impl.
 309         * include/bits/charconv.h: New header.
 310         (__detail::__to_chars_len): Move here from <charconv>.
 311         (__detail::__to_chars_10_impl): New function extracted from
 312         __detail::__to_chars_10.
 313         * include/std/charconv (__cpp_lib_to_chars): Add, but comment out.
 314         (__to_chars_unsigned_type): New class template that reuses
 315         __make_unsigned_selector_base::__select to pick a type.
 316         (__unsigned_least_t): Redefine as __to_chars_unsigned_type<T>::type.
 317         (__detail::__to_chars_len): Move to new header.
 318         (__detail::__to_chars_10): Add inline specifier. Move code doing the
 319         output to __detail::__to_chars_10_impl and call that.
 320         * include/std/version (__cpp_lib_to_chars): Add, but comment out.
 321         * testsuite/21_strings/basic_string/numeric_conversions/char/
 322         to_string.cc: Fix reference in comment. Remove unused variable.
 323         * testsuite/21_strings/basic_string/numeric_conversions/char/
 324         to_string_int.cc: New test.
 325
 326 2019-06-09  Edward Smith-Rowland  <3dw4rd@verizon.net>
 327
 328         Fix ConstexprIterator requirements tests - No constexpr algorithms!
 329         * testsuite/21_strings/basic_string_view/requirements/constexpr_iter.cc:
 330         Replace copy with hand-rolled loop.
 331         * testsuite/23_containers/array/requirements/constexpr_iter.cc:
 332         Ditto.
 333
 334 2019-06-08  Edward Smith-Rowland  <3dw4rd@verizon.net>
 335
 336         Test for C++20 p0858 - ConstexprIterator requirements.
 337         * testsuite/21_strings/basic_string_view/requirements/constexpr_iter.cc:
 338         New test.
 339         * testsuite/23_containers/array/requirements/constexpr_iter.cc:
 340         New test.
 341
 342 2019-06-07  Thomas Rodgers  <trodgers@redhat.com>
 343
 344         Rename PSTL macro's consistent with libstdc++ (and llvm upstream
 345         project) standards.
 346         * include/bits/c++config: Rename all macros of the form __PSTL* to
 347         _PSTL*.
 348         * include/std/algorithm: Likewise.
 349         * include/std/execution: Likewise.
 350         * include/std/numeric: Likewise.
 351         * include/std/memory: Likewise.
 352         * include/pstl/glue_memory_impl.h: Likewise.
 353         * include/pstl/numeric_impl.h: Likewise.
 354         * include/pstl/glue_memory_defs.h: Likewise.
 355         * include/pstl/execution_defs.h: Likewise.
 356         * include/pstl/utils.h: Likewise.
 357         * include/pstl/algorithm_fwd.h: Likewise.
 358         * include/pstl/unseq_backend_simd.h: Likewise.
 359         * include/pstl/glue_execution_defs.h: Likewise.
 360         * include/pstl/algorithm_impl.h: Likewise.
 361         * include/pstl/parallel_impl.h: Likewise.
 362         * include/pstl/memory_impl.h: Likewise.
 363         * include/pstl/glue_numeric_defs.h: Likewise.
 364         * include/pstl/parallel_backend_utils.h: Likewise.
 365         * include/pstl/glue_algorithm_defs.h: Likewise.
 366         * include/pstl/parallel_backend.h: Likewise.
 367         * include/pstl/glue_numeric_impl.h: Likewise.
 368         * include/pstl/parallel_backend_tbb.h: Likewise.
 369         * include/pstl/numeric_fwd.h: Likewise.
 370         * include/pstl/glue_algorithm_impl.h: Likewise.
 371         * include/pstl/execution_impl.h: Likewise.
 372         * include/pstl/pstl_config.h: Likewise.
 373         * testsuite/util/pstl/pstl_test_config.h: Likewise.
 374         * testsuite/util/pstl/test_utils.h: Likewise.
 375         * testsuite/20_util/specialized_algorithms/pstl/uninitialized_construct.cc:
 376         Likewise.
 377         * testsuite/20_util/specialized_algorithms/pstl/uninitialized_copy_move.cc:
 378         Likewise.
 379         * testsuite/26_numerics/pstl/numeric_ops/adjacent_difference.cc:
 380         Likewise.
 381         * testsuite/26_numerics/pstl/numeric_ops/scan.cc: Likewise.
 382         * testsuite/26_numerics/pstl/numeric_ops/transform_scan.cc: Likewise.
 383         * testsuite/26_numerics/pstl/numeric_ops/reduce.cc: Likewise.
 384         * testsuite/25_algorithms/pstl/alg_nonmodifying/reverse.cc: Likewise.
 385         * testsuite/25_algorithms/pstl/alg_nonmodifying/nth_element.cc:
 386         Likewise.
 387         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_end.cc: Likewise.
 388         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_if.cc: Likewise.
 389         * testsuite/25_algorithms/pstl/alg_nonmodifying/none_of.cc: Likewise.
 390         * testsuite/25_algorithms/pstl/alg_nonmodifying/count.cc: Likewise.
 391         * testsuite/25_algorithms/pstl/alg_nonmodifying/reverse_copy.cc:
 392         Likewise.
 393         * testsuite/25_algorithms/pstl/alg_nonmodifying/equal.cc: Likewise.
 394         * testsuite/25_algorithms/pstl/alg_nonmodifying/search_n.cc: Likewise.
 395         * testsuite/25_algorithms/pstl/alg_nonmodifying/find.cc: Likewise.
 396         * testsuite/25_algorithms/pstl/alg_nonmodifying/all_of.cc: Likewise.
 397         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_first_of.cc:
 398         Likewise.
 399         * testsuite/25_algorithms/pstl/alg_sorting/is_heap.cc: Likewise.
 400         * testsuite/25_algorithms/pstl/alg_sorting/partial_sort.cc: Likewise.
 401         * testsuite/25_algorithms/pstl/alg_sorting/partial_sort_copy.cc:
 402         Likewise.
 403         * testsuite/25_algorithms/pstl/alg_sorting/lexicographical_compare.cc:
 404         Likewise.
 405         * testsuite/25_algorithms/pstl/alg_merge/inplace_merge.cc: Likewise.
 406         * testsuite/25_algorithms/pstl/alg_merge/merge.cc: Likewise.
 407         * testsuite/25_algorithms/pstl/alg_modifying_operations/unique_copy_equal.cc:
 408         Likewise.
 409         * testsuite/25_algorithms/pstl/alg_modifying_operations/replace_copy.cc:
 410         Likewise.
 411         * testsuite/25_algorithms/pstl/alg_modifying_operations/is_partitioned.cc:
 412         Likewise.
 413         * testsuite/25_algorithms/pstl/alg_modifying_operations/rotate_copy.cc:
 414         Likewise.
 415         * testsuite/25_algorithms/pstl/alg_modifying_operations/remove.cc:
 416         Likewise.
 417         * testsuite/25_algorithms/pstl/alg_modifying_operations/copy_if.cc:
 418         Likewise.
 419         * testsuite/25_algorithms/pstl/alg_modifying_operations/partition_copy.cc:
 420         Likewise.
 421         * testsuite/25_algorithms/pstl/alg_modifying_operations/partition.cc:
 422         Likewise.
 423         * testsuite/25_algorithms/pstl/alg_modifying_operations/copy_move.cc:
 424         Likewise.
 425         * testsuite/25_algorithms/pstl/alg_modifying_operations/unique.cc:
 426         Likewise.
 427         * testsuite/25_algorithms/pstl/alg_modifying_operations/rotate.cc:
 428         Likewise.
 429         * testsuite/25_algorithms/pstl/alg_nonmodifying/any_of.cc: Likewise.
 430
 431         Rename header guards to be consistent with upstream project's
 432         conventions.
 433         * include/pstl/glue_memory_impl.h: Rename all macros of the form
 434         _PSTL_(.*)_H to _PSTL_\U\1_H.
 435         * include/pstl/numeric_impl.h: Likewise.
 436         * include/pstl/glue_memory_defs.h: Likewise.
 437         * include/pstl/execution_defs.h: Likewise.
 438         * include/pstl/utils.h: Likewise.
 439         * include/pstl/algorithm_fwd.h: Likewise.
 440         * include/pstl/unseq_backend_simd.h: Likewise.
 441         * include/pstl/glue_execution_defs.h: Likewise.
 442         * include/pstl/algorithm_impl.h: Likewise.
 443         * include/pstl/parallel_impl.h: Likewise.
 444         * include/pstl/memory_impl.h: Likewise.
 445         * include/pstl/glue_numeric_defs.h: Likewise.
 446         * include/pstl/parallel_backend_utils.h: Likewise.
 447         * include/pstl/glue_algorithm_defs.h: Likewise.
 448         * include/pstl/parallel_backend.h: Likewise.
 449         * include/pstl/glue_numeric_impl.h: Likewise.
 450         * include/pstl/parallel_backend_tbb.h: Likewise.
 451         * include/pstl/numeric_fwd.h: Likewise.
 452         * include/pstl/glue_algorithm_impl.h: Likewise.
 453         * include/pstl/execution_impl.h: Likewise.
 454         * include/pstl/pstl_config.h: Likewise.
 455         * testsuite/util/pstl/pstl_test_config.h: Likewise.
 456
 457         Synchronize libstdc++ parallel algorithms with upstream
 458         project.
 459         * include/pstl/algorithm_fwd.h: Synchronize with
 460         upstream PSTL project.
 461         * include/pstl/algorithm_impl.h: Likewise.
 462         * include/pstl/execution_defs.h: Likewise.
 463         * include/pstl/execution_impl.h: Likewise.
 464         * include/pstl/glue_algorithm_impl.h: Likewise.
 465         * include/pstl/glue_execution_defs.h: Likewise.
 466         * include/pstl/numeric_fwd.h: Likewise.
 467         * include/pstl/numeric_impl.h: Likewise.
 468         * include/pstl/parallel_backend.h: Likewise.
 469         * include/pstl/pstl_config.h: Likewise.
 470         * include/pstl/unseq_backend_simd.h: Likewise.
 471         * include/pstl/parallel_backend_serial.h: New file.
 472         * include/Makefile.am (pstl_headers): Add
 473         parallel_backend_serial.h.
 474         * include/Makefile.in: Regenerate.
 475
 476         Clean up non-conforming names
 477         * include/pstl/algorithm_impl.h (__parallel_set_union_op):
 478         Uglfiy copy_range1 and copy_range2
 479         (__pattern_walk2_n): Rename local n to __n
 480         * include/pstl/parallel_backend_tbb.h (struct __binary_no_op):
 481         Rename parameter _T to _Tp.
 482
 483         Integrate non-TBB serial backend support
 484         * include/bits/c++config: Adjust TBB detection logic to select serial
 485         PSTL backend if no TBB present.
 486         * testsuite/utils/pstl/test_utils.h: Remove check for
 487         _PSTL_USE_PAR_POLICIES
 488
 489 2019-06-07  Jonathan Wakely  <jwakely@redhat.com>
 490
 491         * testsuite/24_iterators/container_access.cc: Move dg-options before
 492         dg-do directive so the target check uses the -std option.
 493
 494         PR libstdc++/90770
 495         * configure: Regenerate.
 496         * src/Makefile.am (stamp-debug): Also test for missing makefile.
 497         * src/Makefile.in: Regenerate.
 498
 499 2019-06-06  Jonathan Wakely  <jwakely@redhat.com>
 500
 501         * include/std/array: Do not include <stdexcept>.
 502         * include/std/optional: Include <exception> and
 503         <bits/exception_defines.h> instead of <stdexcept>.
 504         * testsuite/20_util/function_objects/searchers.cc: Include <cctype>
 505         for std::isalnum.
 506         * testsuite/20_util/tuple/cons/deduction.cc: Include <memory> for
 507         std::allocator.
 508         * testsuite/23_containers/map/erasure.cc: Include <string>.
 509         * testsuite/23_containers/unordered_map/erasure.cc: Likewise.
 510
 511         * testsuite/23_containers/deque/requirements/dr438/assign_neg.cc: Add
 512         dg-prune-output for different C++98 diagnostic.
 513         * testsuite/23_containers/deque/requirements/dr438/constructor_1_neg.cc:
 514         Likewise.
 515         * testsuite/23_containers/deque/requirements/dr438/constructor_2_neg.cc:
 516         Likewise.
 517         * testsuite/23_containers/deque/requirements/dr438/insert_neg.cc:
 518         Likewise.
 519         * testsuite/23_containers/list/requirements/dr438/assign_neg.cc:
 520         Likewise.
 521         * testsuite/23_containers/list/requirements/dr438/constructor_1_neg.cc:
 522         Likewise.
 523         * testsuite/23_containers/list/requirements/dr438/constructor_2_neg.cc:
 524         Likewise.
 525         * testsuite/23_containers/list/requirements/dr438/insert_neg.cc:
 526         Likewise.
 527         * testsuite/23_containers/vector/requirements/dr438/assign_neg.cc:
 528         Likewise.
 529         * testsuite/23_containers/vector/requirements/dr438/
 530         constructor_1_neg.cc: Likewise.
 531         * testsuite/23_containers/vector/requirements/dr438/
 532         constructor_2_neg.cc: Likewise.
 533         * testsuite/23_containers/vector/requirements/dr438/insert_neg.cc:
 534         Likewise.
 535         * testsuite/libstdc++-prettyprinters/compat.cc: Do not run for C++98.
 536
 537         * testsuite/23_containers/unordered_map/requirements/debug_container.cc:
 538         Do not test allocator rebinding extension for C++2a.
 539         * testsuite/23_containers/unordered_set/allocator/ext_ptr.cc: Change
 540         dg-do directive for C++17 and C++2a.
 541
 542         * testsuite/23_containers/deque/requirements/explicit_instantiation/
 543         1_c++0x.cc: Remove redundant test.
 544         * testsuite/23_containers/deque/requirements/explicit_instantiation/
 545         2.cc: Use target selector instead of preprocessor condition.
 546         * testsuite/23_containers/deque/requirements/explicit_instantiation/
 547         3.cc: Do not run test for C++2a.
 548         * testsuite/23_containers/forward_list/requirements/
 549         explicit_instantiation/3.cc: Likewise.
 550         * testsuite/23_containers/forward_list/requirements/
 551         explicit_instantiation/5.cc: Do not test allocator rebinding extension
 552         for C++2a.
 553         * testsuite/23_containers/list/requirements/explicit_instantiation/
 554         1_c++0x.cc: Remove redundant test.
 555         * testsuite/23_containers/list/requirements/explicit_instantiation/
 556         2.cc: Use target selector instead of preprocessor condition.
 557         * testsuite/23_containers/list/requirements/explicit_instantiation/
 558         3.cc: Do not run test for C++2a.
 559         * testsuite/23_containers/list/requirements/explicit_instantiation/
 560         5.cc: Do not test allocator rebinding extension for C++2a.
 561         * testsuite/23_containers/map/requirements/explicit_instantiation/
 562         1_c++0x.cc: Remove redundant test.
 563         * testsuite/23_containers/map/requirements/explicit_instantiation/
 564         2.cc: Adjust comment.
 565         * testsuite/23_containers/map/requirements/explicit_instantiation/
 566         3.cc: Do not run test for C++2a.
 567         * testsuite/23_containers/map/requirements/explicit_instantiation/
 568         5.cc: Do not test allocator rebinding extension for C++2a.
 569         * testsuite/23_containers/multimap/requirements/explicit_instantiation/
 570         1_c++0x.cc: Remove redundant test.
 571         * testsuite/23_containers/multimap/requirements/explicit_instantiation/
 572         3.cc: Do not run test for C++2a.
 573         * testsuite/23_containers/multimap/requirements/explicit_instantiation/
 574         5.cc: Do not test allocator rebinding extension for C++2a.
 575         * testsuite/23_containers/multiset/requirements/explicit_instantiation/
 576         3.cc: Do not run test for C++2a.
 577         * testsuite/23_containers/multiset/requirements/explicit_instantiation/
 578         5.cc: Do not test allocator rebinding extension for C++2a.
 579         * testsuite/23_containers/set/requirements/explicit_instantiation/3.cc:
 580         Do not run test for C++2a.
 581         * testsuite/23_containers/set/requirements/explicit_instantiation/
 582         1_c++0x.cc: Remove redundant test.
 583         * testsuite/23_containers/set/requirements/explicit_instantiation/5.cc:
 584         Do not test allocator rebinding extension for C++2a.
 585         * testsuite/23_containers/unordered_map/requirements/
 586         explicit_instantiation/3.cc: Likewise.
 587         * testsuite/23_containers/unordered_map/requirements/
 588         explicit_instantiation/5.cc: Do not test allocator rebinding extension
 589         for C++2a.
 590         * testsuite/23_containers/unordered_multimap/requirements/
 591         explicit_instantiation/3.cc: Do not run test for C++2a.
 592         * testsuite/23_containers/unordered_multimap/requirements/
 593         explicit_instantiation/5.cc: Do not test allocator rebinding extension
 594         for C++2a.
 595         * testsuite/23_containers/unordered_multiset/requirements/
 596         explicit_instantiation/3.cc: Do not run test for C++2a.
 597         * testsuite/23_containers/unordered_multiset/requirements/
 598         explicit_instantiation/5.cc: Do not test allocator rebinding extension
 599         for C++2a.
 600         * testsuite/23_containers/unordered_set/requirements/
 601         explicit_instantiation/3.cc: Do not run test for C++2a.
 602         * testsuite/23_containers/unordered_set/requirements/
 603         explicit_instantiation/5.cc: Do not test allocator rebinding extension
 604         for C++2a.
 605         * testsuite/23_containers/vector/ext_pointer/explicit_instantiation/
 606         2.cc: Remove redundant test.
 607         * testsuite/23_containers/vector/ext_pointer/explicit_instantiation/
 608         3.cc: Do not run test for C++2a.
 609         * testsuite/23_containers/vector/requirements/explicit_instantiation/
 610         3.cc: Likewise.
 611
 612         * include/std/type_traits (is_empty, is_polymorphic, is_final)
 613         (is_abstract, is_aggregate): Remove static_assert.
 614         * testsuite/20_util/is_abstract/incomplete_neg.cc: Check for error
 615         from builtin only.
 616         * testsuite/20_util/is_aggregate/incomplete_neg.cc: Likewise. Add
 617         missing -std=gnu++17 option.
 618         * testsuite/20_util/is_empty/incomplete_neg.cc: New test.
 619         * testsuite/20_util/is_final/incomplete_neg.cc: New test.
 620         * testsuite/20_util/is_polymorphic/incomplete_neg.cc: Check for error
 621         from builtin only.
 622
 623         * testsuite/18_support/set_terminate.cc: Do not run for C++98 mode.
 624         * testsuite/18_support/set_unexpected.cc: Likewise.
 625         * testsuite/20_util/is_nothrow_invocable/value.cc: Test converting to
 626         void.
 627         * testsuite/20_util/is_nothrow_invocable/value_ext.cc: Fix constexpr
 628         function to be valid in C++11.
 629         * testsuite/26_numerics/complex/proj.cc: Do not run for C++98 mode.
 630         * testsuite/experimental/names.cc: Do not run for C++98 mode. Do not
 631         include Library Fundamentals or Networking headers in C++11 mode.
 632         * testsuite/ext/char8_t/atomic-1.cc: Do not run for C++98 mode.
 633
 634         * include/std/tuple (_TC): Replace with _TupleConstraints.
 635         (_TupleConstraints): New helper for SFINAE constraints, with more
 636         expressive member functions to reduce duplication when used.
 637         (tuple::_TC2, tuple::_TMC, tuple::_TNTC): Remove.
 638         (tuple::_TCC): Replace dummy type parameter with bool non-type
 639         parameter that can be used to check the pack size.
 640         (tuple::_ImplicitDefaultCtor, tuple::_ExplicitDefaultCtor)
 641         (tuple::_ImplicitCtor, tuple::_ExplicitCtor): New alias templates for
 642         checking constraints in constructors.
 643         (tuple::__valid_args, tuple::_UseOtherCtor, tuple::__use_other_ctor):
 644         New SFINAE helpers.
 645         (tuple::tuple): Use new helpers to reduce repitition in constraints.
 646         (tuple::tuple(allocator_arg_t, const Alloc&)): Constrain.
 647         (tuple<T1, T2>::_TCC, tuple<T1, T2>::_ImplicitDefaultCtor)
 648         (tuple<T1, T2>::_ExplicitDefaultCtor, tuple<T1, T2>::_ImplicitCtor)
 649         (tuple<T1, T2>::_ExplicitCtor): New alias templates for checking
 650         constraints in constructors.
 651         (tuple::__is_alloc_arg()): New SFINAE helpers.
 652         (tuple<T1, T2>::tuple): Use new helpers to reduce repitition in
 653         constraints.
 654         (tuple<T1, T2>::tuple(allocator_arg_t, const Alloc&)): Constrain.
 655         * testsuite/20_util/tuple/cons/90700.cc: New test.
 656         * testsuite/20_util/tuple/cons/allocators.cc: Add default constructor
 657         to meet new constraint on allocator-extended default constructor.
 658
 659 2019-06-03  Jonathan Wakely  <jwakely@redhat.com>
 660
 661         * include/bits/stl_map.h (map): Disable static assert for C++98 mode.
 662         * include/bits/stl_multimap.h (multimap): Likewise.
 663
 664 2019-06-03  François Dumont  <fdumont@gcc.gnu.org>
 665
 666         Rename variables and cleanup comments.
 667         * include/bits/hashtable_policy.h
 668         * include/bits/hashtable.h
 669
 670 2019-06-03  Jonathan Wakely  <jwakely@redhat.com>
 671
 672         * doc/xml/manual/status_cxx2020.xml: Add missing row for P0920R2.
 673         Fix bgcolor for P0340R3.
 674         * doc/html/*: Regenerate.
 675
 676         PR libstdc++/90686
 677         * doc/xml/manual/status_cxx2014.xml: Document what's missing from
 678         <experimental/memory_resource>.
 679         * doc/xml/manual/status_cxx2020.xml: Document status of P1285R0,
 680         P0339R6, P0340R3, P1164R1 and P1357R1.
 681         * doc/html/*: Regenerate.
 682
 683         * doc/xml/manual/status_cxx2020.xml: Document P1463R1 status.
 684         * include/bits/forward_list.h [__cplusplus > 201703]: Enable
 685         allocator::value_type assertion for C++2a.
 686         * include/bits/hashtable.h: Likewise.
 687         * include/bits/stl_deque.h: Likewise.
 688         * include/bits/stl_list.h: Likewise.
 689         * include/bits/stl_map.h: Likewise.
 690         * include/bits/stl_multimap.h: Likewise.
 691         * include/bits/stl_multiset.h: Likewise.
 692         * include/bits/stl_set.h: Likewise.
 693         * include/bits/stl_vector.h: Likewise.
 694         * testsuite/23_containers/deque/48101-3_neg.cc: New test.
 695         * testsuite/23_containers/forward_list/48101-3_neg.cc: New test.
 696         * testsuite/23_containers/list/48101-3_neg.cc: New test.
 697         * testsuite/23_containers/map/48101-3_neg.cc: New test.
 698         * testsuite/23_containers/multimap/48101-3_neg.cc: New test.
 699         * testsuite/23_containers/multiset/48101-3_neg.cc: New test.
 700         * testsuite/23_containers/set/48101-3_neg.cc: New test.
 701         * testsuite/23_containers/unordered_map/48101-3_neg.cc: New test.
 702         * testsuite/23_containers/unordered_multimap/48101-3_neg.cc: New test.
 703         * testsuite/23_containers/unordered_multiset/48101-3_neg.cc: New test.
 704         * testsuite/23_containers/unordered_set/48101-3_neg.cc: New test.
 705         * testsuite/23_containers/vector/48101-3_neg.cc: New test.
 706
 707 2019-05-31  Gerald Pfeifer  <gerald@pfeifer.com>
 708
 709         * doc/xml/manual/allocator.xml: Move hoard.org back to http.
 710
 711 2019-05-31  Jonathan Wakely  <jwakely@redhat.com>
 712
 713         * include/std/tuple (tuple<>): Add noexcept to allocator-extended
 714         constructors.
 715         (tuple<T1, T2>::__nothrow_default_constructible()): New helper
 716         function.
 717         (tuple<T1, T2>::tuple(), explicit tuple<T1, T2>::tuple()): Use helper.
 718
 719 2019-05-31  Jonathan Wakely  <jwakely@redhat.com>
 720
 721         * src/c++98/bitmap_allocator.cc: Add using-declaration for size_t.
 722
 723         PR libstdc++/90682
 724         * libsupc++/eh_term_handler.cc: Include eh_term_handler.h to get
 725         definition of _GLIBCXX_DEFAULT_TERM_HANDLER.
 726         * libsupc++/eh_term_handler.h: New header defining
 727         _GLIBCXX_DEFAULT_TERM_HANDLER.
 728         * libsupc++/eh_terminate.cc: Include eh_term_handler.h.
 729         (set_terminate): Restore default handler when argument is null.
 730         (set_unexpected): Likewise.
 731         * testsuite/18_support/set_terminate.cc: New test.
 732         * testsuite/18_support/set_unexpected.cc: New test.
 733
 734         * include/backward/hashtable.h (size_t, ptrdiff_t)
 735         (forward_iterator_tag, input_iterator_tag, _Construct, _Destroy)
 736         (distance, vector, pair, __iterator_category): Remove
 737         using-declarations that add these names to namespace __gnu_cxx.
 738         * include/ext/bitmap_allocator.h (size_t, ptrdiff_t): Likewise.
 739         * include/ext/debug_allocator.h (size_t): Likewise.
 740         * include/ext/functional (size_t, unary_function, binary_function)
 741         (mem_fun1_t, const_mem_fun1_t, mem_fun1_ref_t, const_mem_fun1_ref_t):
 742         Likewise.
 743         * include/ext/malloc_allocator.h (size_t, ptrdiff_t): Likewise.
 744         * include/ext/memory (ptrdiff_t, pair, __iterator_category): Likewise.
 745         * include/ext/mt_allocator.h (size_t, ptrdiff_t): Likewise.
 746         * include/ext/new_allocator.h (size_t, ptrdiff_t): Likewise.
 747         * include/ext/numeric (iota): Fix outdated comment.
 748         * include/ext/pool_allocator.h (size_t, ptrdiff_t): Likewise.
 749         * include/ext/rb_tree (_Rb_tree, allocator): Likewise.
 750         * include/ext/rope (size_t, ptrdiff_t, allocator, _Destroy): Likewise.
 751         * include/ext/ropeimpl.h (size_t, printf, basic_ostream)
 752         (__throw_length_error, _Destroy, std::__uninitialized_fill_n_a):
 753         Likewise.
 754         * include/ext/slist (size_t, ptrdiff_t, _Construct, _Destroy)
 755         (allocator, __true_type, __false_type): Likewise.
 756
 757 2019-05-31  Antony Polukhin  <antoshkka@gmail.com>
 758
 759         PR libstdc++/71579
 760         * include/std/type_traits __type_identity, __is_complete_or_unbounded):
 761         New helpers for checking preconditions in traits.
 762         (is_trivial, is_trivially_copyable, is_standard_layout, is_pod)
 763         (is_literal_type, is_empty, is_polymorphic, is_final, is_abstract)
 764         (is_destructible, is_nothrow_destructible, is_constructible)
 765         (is_default_constructible, is_copy_constructible)
 766         (is_move_constructible, is_nothrow_default_constructible)
 767         (is_nothrow_constructible, is_nothrow_copy_constructible)
 768         (is_nothrow_move_constructible, is_copy_assignable, is_move_assignable)
 769         (is_nothrow_assignable, is_nothrow_copy_assignable)
 770         (is_nothrow_move_assignable, is_trivially_constructible)
 771         (is_trivially_copy_constructible, is_trivially_move_constructible)
 772         is_trivially_assignable, is_trivially_copy_assignable)
 773         (is_trivially_move_assignable, is_trivially_destructible)
 774         (alignment_of, is_swappable, is_nothrow_swappable, is_invocable)
 775         (is_invocable_r, is_nothrow_invocable)
 776         (has_unique_object_representations, is_aggregate): Add static_asserts
 777         to make sure that type traits are not misused with incomplete types.
 778         (__is_constructible_impl, __is_nothrow_default_constructible_impl)
 779         (__is_nothrow_constructible_impl, __is_nothrow_assignable_impl): New
 780         base characteristics without assertions that can be reused in other
 781         traits.
 782         * testsuite/20_util/is_complete_or_unbounded/memoization.cc: New test.
 783         * testsuite/20_util/is_complete_or_unbounded/memoization_neg.cc: New
 784         test.
 785         * testsuite/20_util/is_complete_or_unbounded/value.cc: New test.
 786         * testsuite/20_util/is_abstract/incomplete_neg.cc: New test.
 787         * testsuite/20_util/is_aggregate/incomplete_neg.cc: New test.
 788         * testsuite/20_util/is_class/value.cc: Check incomplete type.
 789         * testsuite/20_util/is_function/value.cc: Likewise.
 790         * testsuite/20_util/is_move_constructible/incomplete_neg.cc: New test.
 791         * testsuite/20_util/is_nothrow_move_assignable/incomplete_neg.cc: New
 792         test.
 793         * testsuite/20_util/is_polymorphic/incomplete_neg.cc: New test.
 794         * testsuite/20_util/is_reference/value.cc: Check incomplete types.
 795         * testsuite/20_util/is_unbounded_array/value.cc: Likewise.
 796         * testsuite/20_util/is_union/value.cc: Likewise.
 797         * testsuite/20_util/is_void/value.cc: Likewise.
 798         * testsuite/util/testsuite_tr1.h: Add incomplete union type.
 799
 800 2019-05-31  Jonathan Wakely  <jwakely@redhat.com>
 801
 802         * include/bits/random.h (random_device::_M_init(const char*, size_t)):
 803         Add new private member function.
 804         * src/c++11/cow-string-inst.cc (random_device::_M_init(const string&))
 805         (random_device::_M_init_pretr1(const string&)): Call new private
 806         member with string data.
 807         * src/c++11/random.cc (random_device::_M_init(const char*, size_t)):
 808         Define.
 809         * testsuite/26_numerics/random/random_device/cons/default-cow.cc: New
 810         test using COW strings.
 811         * testsuite/26_numerics/random/random_device/cons/default.cc: Generate
 812         a value from the device.
 813         * testsuite/26_numerics/random/random_device/cons/token.cc: Likewise.
 814         Fix typo in token string.
 815
 816 2019-05-30  Nina Dinka Ranns  <dinka.ranns@gmail.com>
 817
 818         LWG2788 basic_string spurious use of a default constructible allocator
 819         * include/bits/basic_string.tcc [_GLIBCXX_USE_CXX11_ABI]
 820         (basic_string::_M_replace_dispatch): Construct temporary string with
 821         the current allocator.
 822         * testsuite/21_strings/basic_string/allocator/char/lwg2788.cc: New.
 823         * testsuite/21_strings/basic_string/allocator/wchar_t/lwg2788.cc: New.
 824
 825 2019-05-30  Jonathan Wakely  <jwakely@redhat.com>
 826
 827         * doc/xml/manual/diagnostics.xml: Update list of headers that define
 828         exception classes.
 829         * doc/xml/manual/support.xml: Rewrite advice around NULL. Rewrite
 830         section about new/delete overloads. Improve section on verbose
 831         terminate handler.
 832         * doc/html/*: Regenerate.
 833
 834         * doc/xml/manual/status_cxx2020.xml: Add feature-test macro for
 835         P0811R3. Change status of P1353R0.
 836         * doc/html/*: Regenerate.
 837
 838         * doc/xml/manual/status_cxx2011.xml: Use <variablelist> for
 839         documentation of implementation-defined types for [thread.req.native].
 840         * doc/xml/manual/status_cxx2017.xml: Update documentation of
 841         implementation-defined strings for [variant.bad.access]. Fix typo in
 842         documentation of implementation-defined support for [fs.conform.9945].
 843         * doc/html/*: Regenerate.
 844
 845 2019-05-29  Jonathan Wakely  <jwakely@redhat.com>
 846
 847         PR libstdc++/85494
 848         * testsuite/26_numerics/random/random_device/cons/token.cc: Fix test
 849         that fails on mingw-w64.
 850
 851         PR libstdc++/88881
 852         * src/c++17/fs_ops.cc [_GLIBCXX_FILESYSTEM_IS_WINDOWS]
 853         (status(const path&, error_code&)): Use parent_path() to remove
 854         trailing slash.
 855         (symlink_status(const path&, error_code&)): Duplicate workaround for
 856         bug in _wstat for paths with trailing slash.
 857         * testsuite/27_io/filesystem/operations/remove_all.cc: Check path
 858         with trailing slash.
 859         * testsuite/27_io/filesystem/operations/status.cc: Likewise.
 860         * testsuite/27_io/filesystem/operations/symlink_status.cc: Likewise.
 861
 862         * src/c++17/fs_path.cc (path::parent_path()): Create whole path at
 863         once instead of building it iteratively.
 864
 865         * testsuite/util/testsuite_api.h: Remove names of unused parameters.
 866
 867         PR libstdc++/85494 use rdseed and rand_s in std::random_device
 868         * acinclude.m4 (GLIBCXX_CHECK_X86_RDSEED): Define macro to check if
 869         the assembler supports rdseed.
 870         * config.h.in: Regenerate.
 871         * configure: Regenerate.
 872         * configure.ac: Use GLIBCXX_CHECK_X86_RDSEED.
 873         * config/os/mingw32-w64/os_defines.h (_GLIBCXX_USE_CRT_RAND_S): Define.
 874         * doc/html/*: Regenerate.
 875         * doc/xml/manual/status_cxx2011.xml: Document new tokens.
 876         * include/bits/random.h (random_device::random_device()): Always call
 877         _M_init rather than _M_init_pretr1.
 878         (random_device::random_device(const string&)): Likewise.
 879         (random_device::operator()()): Always call _M_getval().
 880         (random_device::_M_file): Replace first member of union with an
 881         anonymous struct, with _M_file as its first member.
 882         * src/c++11/random.cc [_GLIBCXX_X86_RDRAND] (USE_RDRAND): Define.
 883         [_GLIBCXX_X86_RDSEED] (USE_RDSEED): Define.
 884         (USE_MT19937): Define if none of the above are defined.
 885         (USE_POSIX_FILE_IO): Define.
 886         (_M_strtoul): Remove.
 887         [USE_RDSEED] (__x86_rdseed): Define new function.
 888         [_GLIBCXX_USE_CRT_RAND_S] (__winxp_rand_s): Define new function.
 889         (random_device::_M_init(const string&)): Initialize new union members.
 890         Add support for "rdseed" and "rand_s" tokens. Decide what the
 891         "default" token does according to which USE_* macros are defined.
 892         [USE_POSIX_FILE_IO]: Store a file descriptor.
 893         [USE_MT19937]: Forward to _M_init_pretr1 instead.
 894         (random_device::_M_init_pretr1(const string&)) [USE_MT19937]: Inline
 895         code from _M_strtoul.
 896         [!USE_MT19937]: Call _M_init, transforming the old default token or
 897         numeric tokens to "default".
 898         (random_device::_M_fini()) [USE_POSIX_FILE_IO]: Use close not fclose.
 899         (random_device::_M_getval()): Use new union members to obtain a
 900         random number from the stored function pointer or file descriptor.
 901         [USE_MT19937]: Obtain a value from the mt19937 engine.
 902         (random_device::_M_getval_pretr1()): Call _M_getval().
 903         (random_device::_M_getentropy()) [USE_POSIX_FILE_IO]: Use _M_fd
 904         instead of fileno.
 905         [!USE_MT19937] (mersenne_twister): Do not instantiate when not needed.
 906         * testsuite/26_numerics/random/random_device/85494.cc: New test.
 907
 908 2019-05-28  Jonathan Wakely  <jwakely@redhat.com>
 909
 910         PR libstdc++/90634
 911         * include/experimental/bits/fs_path.h (path::path(path&&)): Only call
 912         _M_split_cmpts() for a path with multiple components.
 913         (path::_S_is_dir_sep()): Add missing 'static' keyword to function.
 914         * src/filesystem/path.cc (path::_M_split_cmpts()): Count number of
 915         components and reserve space in vector. Return early when there is
 916         only one component.
 917         * testsuite/27_io/filesystem/path/construct/90634.cc: New test.
 918         * testsuite/experimental/filesystem/path/construct/90634.cc: New test.
 919
 920         * testsuite/util/testsuite_fs.h (compare_paths): Use three-argument
 921         form of std::equals for C++11 compatibility.
 922
 923 2019-05-26  Gerald Pfeifer  <gerald@pfeifer.com>
 924
 925         * doc/xml/manual/appendix_contributing.xml: Update pointer to
 926         C++ standard at ansi.org.
 927
 928 2019-05-24  Jonathan Wakely  <jwakely@redhat.com>
 929
 930         * include/std/numeric (midpoint(T*, T*)): Fix incorrect result.
 931         * testsuite/26_numerics/midpoint/pointer.cc: Change "compile" test
 932         to "run".
 933
 934         * testsuite/20_util/shared_ptr/cons/alias-rval.cc: Fix test.
 935         * testsuite/20_util/shared_ptr/cons/alias.cc: Remove unused function.
 936
 937 2019-05-23  Jonathan Wakely  <jwakely@redhat.com>
 938
 939         * testsuite/20_util/function_objects/invoke/1.cc: Move C++17-specific
 940         tests to ...
 941         * testsuite/20_util/function_objects/invoke/3.cc: New test.
 942         * testsuite/23_containers/unordered_set/allocator/ext_ptr.cc: Change
 943         "compile" test to "run".
 944
 945         * doc/xml/manual/intro.xml: Document LWG DR 2996 change.
 946         * doc/html/*: Regenerate.
 947         * include/bits/shared_ptr.h (shared_ptr(shared_ptr&&, T*)): Add
 948         rvalue aliasing constructor.
 949         (static_pointer_cast, const_pointer, dynamic_pointer_cast)
 950         (reinterpret_pointer_cast): Add overloads taking rvalues.
 951         * include/bits/shared_ptr_base.h (__shared_ptr(__shared_ptr&&, T*)):
 952         Add rvalue aliasing constructor.
 953         * testsuite/20_util/shared_ptr/casts/1.cc: Change "compile" test to
 954         "run" and check return values as well as types.
 955         * testsuite/20_util/shared_ptr/casts/reinterpret.cc: Likewise.
 956         * testsuite/20_util/shared_ptr/casts/rval.cc: New test.
 957         * testsuite/20_util/shared_ptr/cons/alias-rval.cc: New test.
 958         * testsuite/20_util/shared_ptr/cons/alias.cc: Remove unused return
 959         values.
 960
 961         * doc/xml/manual/evolution.xml: Document LWG DR 2921 change.
 962         * doc/xml/manual/intro.xml: Likewise.
 963         * include/std/future (__create_task_state): Add default arguments
 964         to make providing an allocator optional.
 965         (packaged_task::packaged_task(F&&)): Call __create_task_state directly
 966         instead of delegating to another constructor.
 967         (packaged_task::packaged_task(allocator_arg_t, const A&, ...)): Do not
 968         define allocator-extended constructors for C++17 and later.
 969         * testsuite/30_threads/packaged_task/cons/alloc.cc: Only run test for
 970         C++11 and C++14.
 971         * testsuite/30_threads/packaged_task/cons/alloc2.cc: Likewise.
 972         * testsuite/30_threads/packaged_task/cons/alloc_min.cc: Likewise.
 973         * testsuite/30_threads/packaged_task/uses_allocator.cc: Likewise.
 974
 975 2019-05-23  Hans-Peter Nilsson  <hp@axis.com>
 976
 977         * testsuite/26_numerics/random/poisson_distribution/operators/values.cc:
 978         Don't run the libstdc++/83237 part on simulator targets.
 979
 980 2019-05-23  Jonathan Wakely  <jwakely@redhat.com>
 981
 982         * doc/xml/manual/status_cxx2017.xml: Add feature test macro for
 983         P0040R3.
 984         * doc/html/*: Regenerate.
 985
 986         * include/experimental/any (__any_caster): Use RTTI if comparing
 987         addresses fails, to support non-unique addresses in shared libraries.
 988         * include/std/any (__any_caster): Likewise.
 989
 990         PR libstdc++/90220
 991         * include/experimental/any (__any_caster): Constrain to only be
 992         callable for object types. Use remove_cv_t instead of decay_t.
 993         If the type decays or isn't copy constructible, compare the manager
 994         function to a dummy specialization.
 995         (__any_caster): Add overload constrained for non-object types.
 996         (any::_Manager_internal<_Op>): Add dummy specialization.
 997         * testsuite/experimental/any/misc/any_cast.cc: Test function types
 998         and array types.
 999
1000 2019-05-22  Jonathan Wakely  <jwakely@redhat.com>
1001
1002         PR libstdc++/90557
1003         * src/c++17/fs_path.cc (path::_List::operator=(const _List&)): Fix
1004         reversed arguments to uninitialized_copy_n.
1005         * testsuite/27_io/filesystem/path/assign/copy.cc: Check that source
1006         is unchanged by copy assignment.
1007         * testsuite/util/testsuite_fs.h (compare_paths): Use std::equal to
1008         compare path components.
1009
1010         PR libstdc++/77691
1011         * include/experimental/memory_resource: Add system header pragma and
1012         do not define anything unless compiled as C++14 or later.
1013         (__resource_adaptor_common::__guaranteed_alignment): Remove.
1014         (__resource_adaptor_imp::do_allocate): If the requested alignment
1015         is a fundamental alignment then either allocate directly from _M_alloc
1016         or call the new _M_allocate function.
1017         (__resource_adaptor_imp::do_deallocate): Likewise for deallocation.
1018         (__resource_adaptor_imp::_M_allocate): New function that uses a copy
1019         of the allocator rebound to a POD type with the specified alignment.
1020         (__resource_adaptor_imp::_M_deallocate): Likewise for deallocation.
1021         * testsuite/experimental/memory_resource/new_delete_resource.cc:
1022         Adjust expected allocation sizes.
1023         * testsuite/experimental/memory_resource/resource_adaptor.cc: Remove
1024         xfail for Solaris x86.
1025
1026 2019-05-21  Thomas Rodgers  <trodgers@redhat.com>
1027
1028         LWG 3062 - Unnecessary decay_t in is_execution_policy_v
1029         * include/pstl/execution_defs.h (__enable_if_execution_policy):
1030         Use std::__remove_cvref_t when building with GCC.
1031
1032 2019-05-21  Jonathan Wakely  <jwakely@redhat.com>
1033
1034         PR libstdc++/90252
1035         * testsuite/lib/libstdc++.exp (check_effective_target_tbb-backend):
1036         Use "additional_flags" to pass -ltbb to v3_target_compile command.
1037         Use check_v3_target_prop_cached to cache the result of the test.
1038
1039         * doc/xml/manual/shared_ptr.xml: Fix names of lock policy constants.
1040
1041 2019-05-20  Thomas Rodgers  <trodgers@redhat.com>
1042
1043         PR libstdc++/90252
1044         * testsuite/lib/libstdc++.exp (check_effective_target_tbb-backend):
1045         Changed v3_target_compile check from preprocess to executable.
1046         Added "-ltbb" to v3_target_compile flags.
1047
1048 2019-05-20  Thomas Rodgers  <trodgers@redhat.com>
1049
1050         * testsuite/lib/libstdc++.exp (check_effective_target_tbb-backend):
1051         Add check for Thread Building Blocks 2018 or later.
1052
1053 2019-05-20  Jonathan Wakely  <jwakely@redhat.com>
1054
1055         * testsuite/experimental/names.cc: Only include Networking TS headers
1056         on targets with the necessary Gthreads support.
1057
1058 2019-05-20  Marek Polacek  <polacek@redhat.com>
1059
1060         CWG 2094 - volatile scalars are trivially copyable.
1061         PR c++/85679
1062         * testsuite/20_util/is_trivially_copyable/value.cc: Change the expected
1063         result for volatile int.
1064
1065 2019-05-20  Jonathan Wakely  <jwakely@redhat.com>
1066
1067         * testsuite/17_intro/names.cc: Do not check 'ptr' on Solaris.
1068         * testsuite/experimental/names.cc: Include <experimental/filesystem>
1069         conditionally.
1070
1071         PR c++/90532 Ensure __is_constructible(T[]) is false
1072         * include/std/type_traits (__do_is_default_constructible_impl)
1073         (__is_default_constructible_atom, __is_default_constructible_safe):
1074         Remove.
1075         (is_default_constructible): Use is_constructible.
1076         * testsuite/20_util/is_constructible/value.cc: Check int[] case.
1077         * testsuite/20_util/is_default_constructible/value.cc: Likewise.
1078         * testsuite/20_util/is_trivially_constructible/value.cc: Likewise.
1079         * testsuite/20_util/is_trivially_default_constructible/value.cc:
1080         Likewise.
1081
1082 2019-05-20  Pádraig Brady  <pbrady@fb.com>
1083
1084         * libstdc++-v3/include/ext/new_allocator.h (deallocate): Pass the size
1085         to the deallocator with -fsized-deallocation.
1086
1087 2019-05-20  Jonathan Wakely  <jwakely@redhat.com>
1088
1089         * testsuite/experimental/memory_resource/new_delete_resource.cc: Fix
1090         test by passing correct alignment to deallocate function.
1091
1092 2019-05-18  Jonathan Wakely  <jwakely@redhat.com>
1093
1094         PR libstdc++/90520
1095         * python/libstdcxx/v6/printers.py (UniquePointerPrinter.__init__):
1096         Raise exception if unique_ptr tuple member has unknown structure.
1097         * python/libstdcxx/v6/xmethods.py (UniquePtrGetWorker.__call__):
1098         Adjust worker to support new __uniq_ptr_data base class. Do not
1099         assume field called _M_head_impl is the first tuple element.
1100
1101 2019-05-17  François Dumont  <fdumont@gcc.gnu.org>
1102
1103         * include/bits/stl_deque.h
1104         (_Deque_iterator<>::__ptr_to): Remove, use std::__ptr_rebind.
1105         (_Deque_base(_Deque_base&&, const allocator_type&)): New.
1106         (_Deque_base::_Deque_impl_data): New.
1107         (_Deque_base::_Deque_impl): Inherit latter.
1108         (_Deque_base::_Deque_impl::_M_swap_data): Move...
1109         (_Deque_base::_Deque_impl_data::_M_swap_data): ... here.
1110         (_Deque_base::_Deque_impl()): Add noexcept qualification.
1111         (_Deque_base::_Deque_impl(_Deque_impl&&, _Tp_alloc_type&&)): New.
1112         (_Deque_base::_Deque_impl::_M_get_Tp_allocator()): Remove static_cast.
1113         (deque<>::deque()): Default.
1114         (deque<>::deque(deque&&)): Default.
1115         (deque<>::deque(deque&&, const allocator_type&, false_type)): New.
1116         (deque<>::deque(deque&&, const allocator_type&, true_type)): New.
1117         (deque<>::deque(deque&&, const allocator_type&)): Delegate to latters.
1118         (deque<>::deque<_It>(_It, _It, const allocator_type&)): Use
1119         _M_range_initialize.
1120         (deque<>::assign<_It>(_It, _It)): Use _M_assign_aux.
1121         (deque<>::resize(size_type, const value_type&)): Share a single
1122         implementation.
1123         (deque<>::insert<_It>(const_iterator, _It, _It)): Use
1124         _M_range_insert_aux.
1125         [__cplusplus >= 201103L](_M_initialize_dispatch): Remove.
1126         [__cplusplus >= 201103L](_M_assign_dispatch): Remove.
1127         [__cplusplus >= 201103L](_M_insert_dispatch): Remove.
1128         * testsuite/23_containers/deque/allocator/default_init.cc: New.
1129
1130 2019-05-17  Jonathan Wakely  <jwakely@redhat.com>
1131
1132         PR libstdc++/90246
1133         * include/std/variant (holds_alternative, get, get_if): Improve
1134         static assertion messages.
1135         (bad_variant_access::bad_variant_access()): Change default message.
1136         (__throw_bad_variant_access(bool)): New overload.
1137         (get): Use new overload.
1138         (visit, visit<R>): Improve exception message.
1139
1140         * testsuite/20_util/variant/compile.cc: Fix narrowing test for ILP32
1141         targets. Add more cases from P0608R3.
1142         * testsuite/20_util/variant/run.cc: Add more cases from P0608R3.
1143
1144         * include/bits/random.h (seed_seq::param): Fix non-reserved name.
1145         * include/experimental/type_traits (is_detected_exact)
1146         (is_detected_exact_v): Likewise.
1147         * include/pstl/execution_defs.h (is_execution_policy)
1148         (is_execution_policy_v, __enable_if_execution_policy): Likewise.
1149         * include/pstl/execution_impl.h (__policy_traits): Likewise.
1150         * testsuite/17_intro/names.cc: Check for more non-reserved names.
1151         * testsuite/experimental/names.cc: New test.
1152
1153         PR libstdc++/85965
1154         * include/bits/hashtable.h (_Hashtable::~_Hashtable()): Remove static
1155         assertions from the destructor.
1156         * include/bits/hashtable_policy.h (_Hash_code_base::_M_hash_code):
1157         Move static_assert for hash function to here.
1158         (_Hash_table_base::_M_equals): Move static_assert for equality
1159         predicate to here.
1160         * include/bits/stl_tree.h (_Rb_tree::_S_value(_Const_Link_type)):
1161         Remove.
1162         (_Rb_tree::_S_key(_Const_Link_type)): Move assertions here. Access
1163         the value directly instead of calling _S_value.
1164         (_Rb_tree::_S_value(_Const_Base_ptr)): Remove.
1165         (_Rb_tree::_S_key(_Const_Base_ptr)): Do downcast and forward to
1166         _S_key(_Const_Link_type).
1167         * testsuite/23_containers/set/85965.cc: Check construction,
1168         destruction, assignment and size() do not trigger the assertions.
1169         * testsuite/23_containers/unordered_set/85965.cc: Likewise.
1170         * testsuite/23_containers/map/48101_neg.cc: Call find and adjust
1171         expected errors.
1172         * testsuite/23_containers/multimap/48101_neg.cc: Likewise.
1173         * testsuite/23_containers/multiset/48101_neg.cc: Likewise.
1174         * testsuite/23_containers/set/48101_neg.cc: Likewise.
1175         * testsuite/23_containers/unordered_map/48101_neg.cc: Likewise.
1176         * testsuite/23_containers/unordered_multimap/48101_neg.cc: Likewise.
1177         * testsuite/23_containers/unordered_multiset/48101_neg.cc: Likewise.
1178         * testsuite/23_containers/unordered_set/48101_neg.cc: Likewise.
1179
1180         * include/bits/invoke.h [__cplusplus < 201703L] (__invoke_r<void>):
1181         Use _GLIBCXX14_CONSTEXPR because void functions cannot be constexpr
1182         in C++11.
1183
1184         * doc/xml/manual/status_cxx2020.xml: Update P0608R3, P0777R1, and
1185         P1165R1 entries.
1186         * doc/html/*: Regenerate.
1187         * include/std/tuple (make_from_tuple): Use remove_reference_t instead
1188         of decay_t (P0777R1).
1189
1190 2019-05-17  François Dumont  <fdumont@gcc.gnu.org>
1191
1192         Move from state of allocators (LWG2593)
1193         * include/bits/stl_deque.h
1194         (_Deque_base(_Deque_base&&, false_type)): Remove.
1195         (_Deque_base(_Deque_base&&, true_type)): Remove.
1196         (_Deque_base(_Deque_base&&)): Adapt.
1197         (_Deque_base::_M_move_impl()): Remove.
1198         * testsuite/util/testsuite_allocator.h
1199         (propagating_allocator(propagating_allocator&&)): Preserve move from
1200         state.
1201         * testsuite/23_containers/deque/allocator/move_assign.cc (test02):
1202         Adapt.
1203         * testsuite/23_containers/forward_list/allocator/move_assign.cc (test02):
1204         Adapt.
1205         * testsuite/23_containers/list/allocator/move_assign.cc (test02): Adapt.
1206         * testsuite/23_containers/map/allocator/move_assign.cc (test02): Adapt.
1207         * testsuite/23_containers/multimap/allocator/move_assign.cc (test02):
1208         Adapt.
1209         * testsuite/23_containers/multiset/allocator/move_assign.cc (test02):
1210         Adapt.
1211         * testsuite/23_containers/set/allocator/move_assign.cc (test02): Adapt.
1212         * testsuite/23_containers/unordered_map/allocator/move_assign.cc
1213         (test02): Adapt.
1214         * testsuite/23_containers/unordered_multimap/allocator/move_assign.cc
1215         (test02): Adapt.
1216         * testsuite/23_containers/unordered_multiset/allocator/move_assign.cc
1217         (test02): Adapt.
1218         * testsuite/23_containers/unordered_set/allocator/move_assign.cc
1219         (test02): Adapt.
1220         * testsuite/23_containers/vector/allocator/move_assign.cc (test02):
1221         Adapt.
1222         * testsuite/23_containers/vector/bool/allocator/move_assign.cc (test02):
1223         Adapt.
1224         * testsuite/21_strings/basic_string/allocator/char/move_assign.cc
1225         (test02): Adapt.
1226         * testsuite/21_strings/basic_string/allocator/wchar_t/move_assign.cc
1227         (test02): Adapt.
1228
1229 2019-05-16  Jonathan Wakely  <jwakely@redhat.com>
1230
1231         * src/c++17/fs_ops.cc (absolute(const path&, error_code&))
1232         [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Remove bogus assertion.
1233
1234         * include/std/variant (__overload_set): Remove.
1235         (_Arr): New helper.
1236         (_Build_FUN): New class template to define a single FUN overload,
1237         with specializations to prevent unwanted conversions, as per P0608R3.
1238         (_Build_FUNs): New class template to build an overload set of FUN.
1239         (_FUN_type): New alias template to perform overload resolution.
1240         (__accepted_type): Use integer_constant base for failure case. Use
1241         _FUN_type for successful case.
1242         (variant::__accepted_index): Use _Tp instead of _Tp&&.
1243         (variant::variant(_Tp&&)): Likewise.
1244         (variant::operator=(_Tp&&)): Likewise.
1245
1246         * include/std/variant (_Variant_storage<false, _Types...>::_M_reset):
1247         Replace raw visitation with a runtime check for the valueless state
1248         and a non-raw visitor.
1249         (_Variant_storage<false, _Types...>::_M_reset_impl): Remove.
1250         (variant::index()): Remove branch.
1251         (variant::swap(variant&)): Use valueless_by_exception() instead of
1252         comparing the index to variant_npos, and add likelihood attribute.
1253
1254         * include/bits/hashtable_policy.h (_Equal_helper): Remove.
1255         (_Hashtable_base::_Equal_hash_code): Define new class template.
1256         (_Hashtable_base::_M_equals): Use _Equal_hash_code instead of
1257         _Equal_helper.
1258
1259         * include/bits/hashtable_policy.h (_Hashtable_ebo_helper::_S_get):
1260         Replace with _M_get non-static member function.
1261         (_Hashtable_ebo_helper::_S_cget): Replace with _M_cget non-static
1262         member function.
1263         (_Hash_code_base, _Local_iterator_base, _Hashtable_base):
1264         (_Hashtable_alloc): Adjust to use non-static members of EBO helper.
1265
1266         * include/bits/hashtable_policy.h (_Hash_code_base::_M_swap): Use
1267         _S_get accessors for members in EBO helpers.
1268         (_Hash_code_base::_M_extract(), _Hash_code_base::_M_ranged_hash())
1269         (_Hash_code_base::_M_h1(), _Hash_code_base::_M_h2()): Remove non-const
1270         overloads.
1271         (_Hashtable_base::_M_swap): Use _S_get accessors for members in EBO
1272         helpers.
1273         (_Hashtable_base::_M_eq()): Remove non-const overload.
1274
1275 2019-05-15  Jonathan Wakely  <jwakely@redhat.com>
1276
1277         * include/std/variant (visit, visit<R>): Qualify calls to __do_visit.
1278
1279 2019-05-14  Jonathan Wakely  <jwakely@redhat.com>
1280
1281         * testsuite/util/testsuite_allocator.h (NullablePointer::operator bool):
1282         Fix return value.
1283
1284 2019-05-14  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
1285
1286         * config/os/solaris/solaris2.10: Move to ...
1287         * config/os/solaris: ... this.
1288         * configure.host (os_include_dir): Adapt.
1289         (abi_baseline_pair): Remove Solaris 10 handling.
1290         * config/abi/post/i386-solaris2.10: Remove.
1291         * config/abi/post/sparc-solaris2.10: Remove.
1292         * config/abi/post/i386-solaris2.11: Rename to ...
1293         * config/abi/post/i386-solaris: ... this.
1294         * config/abi/post/sparc-solaris2.11: Rename to ...
1295         * config/abi/post/sparc-solaris: ... this.
1296
1297         * libsupc++/new_opa.cc [_GLIBCXX_HAVE_MEMALIGN] [__sun]: Remove
1298         workaround.
1299
1300         * testsuite/ext/enc_filebuf/char/13598.cc: Remove *-*-solaris2.10
1301         xfail.
1302
1303 2019-05-14  Jonathan Wakely  <jwakely@redhat.com>
1304
1305         * include/std/variant (__visit_with_index): Remove typedef.
1306         (__deduce_visit_result): New tag type.
1307         (__raw_visit, __raw_idx_visit): New helper functions for "raw"
1308         visitation of possibly-valueless variants, forwarding to __do_visit
1309         with the relevant tag type.
1310         (_Variant_storage<false, _Types...>::_M_reset_impl): Use __raw_visit
1311         and make lambda return void.
1312         (__variant_construct): Likewise.
1313         (_Copy_assign_base::operator=, _Move_assign_base::operator=): Use
1314         __raw_idx_visit and make lambda return void.
1315         (_Multi_array::__untag_result): Add metafunction to check the function
1316         pointer type for a tag type that dictates the kind of visitation.
1317         (_Multi_array<_Ret(*)(_Visitor, _Variants...), __first, __rest...>):
1318         Use decltype(auto) instead of tagged function pointer type.
1319         (__gen_vtable_impl): Remove bool non-type parameter and unused
1320         _Variant_tuple parameter.
1321         (__gen_vtable_impl::__visit_invoke_impl): Remove.
1322         (__gen_vtable_impl::__do_visit_invoke): Remove.
1323         (__gen_vtable_impl::__do_visit_invoke_r): Remove.
1324         (__gen_vtable_impl::__visit_invoke): Use if-constexpr and __invoke_r
1325         for the visit<R> case, rather than dispatching to separate functions.
1326         (_VARIANT_RELATION_FUNCTION_TEMPLATE): Use __raw_idx_visit and make
1327         lambda return void.
1328         (variant::swap): Likewise.
1329         (__do_visit): Replace two non-type template parameters with a single
1330         type parameter, so that the caller must specify the visitor's return
1331         type (or one of the tag types).
1332         (visit): Deduce a return type from the visitor and use the
1333         __deduce_visit_result tag to enforce that all overloads return the
1334         same type.
1335         (visit<R>): Call __do_visit<R> with explicit result type.
1336         (__variant_hash_call_base_impl::operator()): Use __raw_visit and make
1337         lambda return void.
1338
1339 2019-05-14  Nina Dinka Ranns  <dinka.ranns@gmail.com>
1340
1341         nonesuch is insufficiently useless (lwg2996)
1342         * include/std/type_traits (struct __nonesuch): Added private base
1343         class to make __nonesuch not an aggregate and removed deleted default
1344         constructor.
1345         * include/bits/stl_pair.h (struct __nonesuch_no_braces): Removed.
1346         (operator=(const pair&)): Use __nonesuch instead of
1347         __nonesuch_no_braces.
1348         (operator=(pair&&)): Likewise
1349         * include/std/tuple (operator=(const tuple&)): Use __nonesuch instead
1350         of __nonesuch_no_braces.
1351         (operator=(tuple&&)): Likewise
1352         * include/experimental/type_traits (struct nonesuch): Added private
1353         base class to make nonesuch not an aggregate and removed deleted
1354         default constructor.
1355         * testsuite/20_util/nonesuch/nonesuch.cc: New.
1356         * testsuite/experimental/type_traits/nonesuch.cc: New.
1357
1358 2019-05-14  Jonathan Wakely  <jwakely@redhat.com>
1359
1360         * include/bits/std_function.h (_Simple_type_wrapper): Remove.
1361         (_Function_handler): Remove partial specializations for void return
1362         types and pointers to member.
1363         (_Function_handler::_M_manager): Adapt to removal of
1364         _Simple_type_wrapper.
1365         (_Function_handler::_M_invoke): Use __invoke_r instead of __invoke.
1366         * include/std/functional (_Bind_result::__enable_if_void)
1367         (_Bind_result::__disable_if_void): Remove sfinae helpers.
1368         (_Bind_result::__call): Use __invoke_r and remove overloads for void
1369         return types.
1370         * include/std/future (__future_base::_Task_state::_M_run)
1371         (__future_base::_Task_state::_M_run_delayed): Use __invoke_r and
1372         change return type of lambda expressions.
1373
1374         * include/bits/invoke.h (__invoke_r): Define new function implementing
1375         the INVOKE<R> pseudo-function.
1376         * testsuite/20_util/function_objects/invoke/1.cc: Add more tests.
1377         * testsuite/20_util/function_objects/invoke/2.cc: New test.
1378
1379         * include/std/type_traits (__is_nt_convertible_helper): Define it
1380         unconditionally, not only for C++20.
1381         (__is_nothrow_convertible): Define internal trait for use in C++11.
1382         (__is_nt_invocable_impl: Fix by using __is_nothrow_convertible.
1383         (is_invocable_r_v, is_nothrow_invocable_r_v): Add missing parameter.
1384         * testsuite/20_util/is_nothrow_convertible/value_ext.cc: New test.
1385         * testsuite/20_util/is_nothrow_convertible/value.cc: Check with type
1386         that has nothrow explicit conversion but potentially-throwing implicit
1387         conversion.
1388         * testsuite/20_util/is_nothrow_invocable/value.cc: Likewise.
1389         * testsuite/20_util/is_nothrow_invocable/value_ext.cc: Fix helper
1390         function to only consider implicit conversions.
1391         * testsuite/20_util/tuple/cons/noexcept_specs.cc: Add comment.
1392
1393         * include/std/iterator: Include <iosfwd> instead of <istream> and
1394         <ostream>.
1395
1396         * include/bits/stl_tree.h (_Rb_tree::erase(const Key*, const Key*)):
1397         Remove unused, non-standard function.
1398
1399         * include/bits/regex.h (match_results::max_size()): Adjust return
1400         value to account for prefix/suffix/unmatched subs.
1401         (match_results::_M_resize(unsigned int)): Use _Base_type::assign to
1402         reset the contained sub matches.
1403         (match_results::_M_establish_failed_match(_Bi_iter)): Add new member
1404         function to set result state following a failed match.
1405         * include/bits/regex.tcc (__regex_algo_impl): Remove loop to set
1406         sub_match states after _M_resize. Use _M_establish_failed_match.
1407
1408         PR libstdc++/69724
1409         * include/std/thread (thread::_State_impl, thread::_S_make_state):
1410         Replace single _Callable parameter with variadic _Args pack, to
1411         forward them directly to the tuple of decayed copies.
1412         * testsuite/30_threads/thread/cons/69724.cc: New test.
1413
1414 2019-05-14  Nina Dinka Ranns  <dinka.ranns@gmail.com>
1415
1416         Inconsistency wrt Allocators in basic_string assignment (LWG2579)
1417         * include/bits/basic_string.h: (operator=(const basic_string&):
1418         Move allocator decision to assign.
1419         (assign(const basic_string&)): Move allocator decision here.
1420         * testsuite/21_strings/basic_string/allocator/char/copy_assign.cc:
1421         Add tests.
1422         * testsuite/21_strings/basic_string/allocator/wchar_t/copy_assign.cc:
1423         Add tests.
1424
1425 2019-05-14  Jonathan Wakely  <jwakely@redhat.com>
1426
1427         * testsuite/util/testsuite_allocator.h (memory_resource)
1428         (default_resource_mgr): Fix indentation.
1429
1430         * testsuite/20_util/allocator_traits/members/allocate_hint_nonpod.cc:
1431         Use operator-> to access raw pointer member.
1432         * testsuite/23_containers/vector/59829.cc: Likewise.
1433         * testsuite/23_containers/vector/bool/80893.cc: Likewise.
1434         * testsuite/libstdc++-prettyprinters/cxx11.cc: Use NullablePointer.
1435         * testsuite/util/testsuite_allocator.h (NullablePointer): New utility
1436         for tests.
1437         (PointerBase, PointerBase_void): Derive from NullablePointer and use
1438         its constructors and equality operators. Change converting
1439         constructors to use operator-> to access private member of the other
1440         pointer type.
1441         (PointerBase_void::operator->()): Add, for access to private member.
1442         (operator-(PointerBase, PointerBase)): Change to hidden friend.
1443         (operator==(PointerBase, PointerBase)): Remove.
1444         (operator!=(PointerBase, PointerBase)): Remove.
1445
1446         * python/libstdcxx/v6/printers.py (UniquePointerPrinter.__init__): Do
1447         not assume field called _M_head_impl is the first tuple element.
1448         * testsuite/libstdc++-prettyprinters/compat.cc: Make tuple
1449         implementation more accurate.
1450         * testsuite/libstdc++-prettyprinters/cxx11.cc: Check unique_ptr with
1451         empty pointer type and non-empty deleter.
1452
1453         LWG 2899 - Make is_move_constructible correct for unique_ptr
1454         * include/bits/unique_ptr.h (__uniq_ptr_impl): Add move constructor,
1455         move assignment operator.
1456         (__uniq_ptr_impl::release(), __uniq_ptr_impl::reset(pointer)): Add.
1457         (__uniq_ptr_data): New class template with conditionally deleted
1458         special members.
1459         (unique_ptr, unique_ptr<T[], D>): Change type of data member from
1460         __uniq_ptr_impl<T, D> to __uniq_ptr_data<T, D>. Define move
1461         constructor and move assignment operator as defaulted.
1462         (unique_ptr::release(), unique_ptr<T[], D>::release()): Forward to
1463         __uniq_ptr_impl::release().
1464         (unique_ptr::reset(pointer), unique_ptr<T[], D>::reset<U>(U)): Forward
1465         to __uniq_ptr_impl::reset(pointer).
1466         * python/libstdcxx/v6/printers.py (UniquePointerPrinter.__init__):
1467         Check for new __uniq_ptr_data type.
1468         * testsuite/20_util/unique_ptr/dr2899.cc: New test.
1469
1470 2019-05-13  Jonathan Wakely  <jwakely@redhat.com>
1471
1472         PR libstdc++/90454.cc path construction from void*
1473         * include/bits/fs_path.h (path::_Path): Use remove_pointer so that
1474         pointers to void are rejected as well as void.
1475         * include/experimental/bits/fs_path.h (path::_Path): Likewise.
1476         * testsuite/27_io/filesystem/path/construct/80762.cc: Also check
1477         pointers to void.
1478         * testsuite/experimental/filesystem/path/construct/80762.cc: Likewise.
1479
1480         * doc/xml/manual/policy_data_structures.xml: Comment out stray
1481         <remark> elements. Fix formatting of bibliography references.
1482
1483 2019-05-13  Edward Smith-Rowland  <3dw4rd@verizon.net>
1484
1485         * doc/xml/manual/status_cxx2020.xml: Document P0811R3 status.
1486
1487 2019-05-13  Jonathan Wakely  <jwakely@redhat.com>
1488
1489         Remove Profile Mode, deprecated since 7.1.0
1490         * doc/Makefile.am: Remove XML file for profile mode docs.
1491         * doc/Makefile.in: Regenerate.
1492         * doc/xml/authors.xml: Remove authors of profile mode docs.
1493         * doc/xml/manual/appendix_contributing.xml: Remove mention of profile
1494         mode.
1495         * doc/xml/manual/debug.xml: Likewise.
1496         * doc/xml/manual/evolution.xml: Document removal of profile mode.
1497         * doc/xml/manual/profile_mode.xml: Remove profile mode docs.
1498         * doc/xml/manual/spine.xml: Remove profile mode author credit.
1499         * doc/xml/manual/test.xml: Remove docs for dg-require-profile-mode
1500         directive.
1501         * doc/xml/manual/using.xml: Remove docs for profile mode headers and
1502         macro.
1503         * doc/html/*: Regenerate.
1504         * include/Makefile.am: Remove profile mode headers.
1505         * include/Makefile.in: Regenerate.
1506         * include/bits/c++config (std::__profile): Remove namespace.
1507         [_GLIBCXX_PROFILE]: Remove checks for macro.
1508         * include/profile/array: Remove.
1509         * include/profile/base.h: Remove.
1510         * include/profile/bitset: Remove.
1511         * include/profile/deque: Remove.
1512         * include/profile/forward_list: Remove.
1513         * include/profile/impl/profiler.h: Remove.
1514         * include/profile/impl/profiler_algos.h: Remove.
1515         * include/profile/impl/profiler_container_size.h: Remove.
1516         * include/profile/impl/profiler_hash_func.h: Remove.
1517         * include/profile/impl/profiler_hashtable_size.h: Remove.
1518         * include/profile/impl/profiler_list_to_slist.h: Remove.
1519         * include/profile/impl/profiler_list_to_vector.h: Remove.
1520         * include/profile/impl/profiler_map_to_unordered_map.h: Remove.
1521         * include/profile/impl/profiler_node.h: Remove.
1522         * include/profile/impl/profiler_state.h: Remove.
1523         * include/profile/impl/profiler_trace.h: Remove.
1524         * include/profile/impl/profiler_vector_size.h: Remove.
1525         * include/profile/impl/profiler_vector_to_list.h: Remove.
1526         * include/profile/iterator_tracker.h: Remove.
1527         * include/profile/list: Remove.
1528         * include/profile/map: Remove.
1529         * include/profile/map.h: Remove.
1530         * include/profile/multimap.h: Remove.
1531         * include/profile/multiset.h: Remove.
1532         * include/profile/ordered_base.h: Remove.
1533         * include/profile/set: Remove.
1534         * include/profile/set.h: Remove.
1535         * include/profile/unordered_base.h: Remove.
1536         * include/profile/unordered_map: Remove.
1537         * include/profile/unordered_set: Remove.
1538         * include/profile/vector: Remove.
1539         * scripts/run_doxygen: Do not process profile mode headers.
1540         * testsuite/23_containers/array/element_access/60497.cc: Don't use
1541         profile mode type.
1542         * testsuite/23_containers/array/specialized_algorithms/swap_cxx17.cc:
1543         Remove dg-skip-if for profile mode.
1544         * testsuite/23_containers/forward_list/capacity/1.cc: Remove
1545         preprocessor check for profile mode.
1546         * testsuite/23_containers/list/capacity/29134.cc: Likewise.
1547         * testsuite/23_containers/map/modifiers/extract.cc: Remove dg-skip-if
1548         for profile mode.
1549         * testsuite/23_containers/map/modifiers/insert_or_assign/1.cc:
1550         Likewise.
1551         * testsuite/23_containers/map/modifiers/try_emplace/1.cc: Likewise.
1552         * testsuite/23_containers/multimap/modifiers/extract.cc: Likewise.
1553         * testsuite/23_containers/multiset/modifiers/extract.cc: Likewise.
1554         * testsuite/23_containers/set/modifiers/extract.cc: Likewise.
1555         * testsuite/23_containers/unordered_map/modifiers/extract.cc:
1556         Likewise.
1557         * testsuite/23_containers/unordered_multimap/modifiers/extract.cc:
1558         Likewise.
1559         * testsuite/23_containers/unordered_multiset/modifiers/extract.cc:
1560         Likewise.
1561         * testsuite/23_containers/unordered_set/modifiers/extract.cc:
1562         Likewise.
1563         * testsuite/23_containers/vector/bool/capacity/29134.cc: Remove
1564         preprocessor check for profile mode.
1565         * testsuite/23_containers/vector/bool/modifiers/insert/31370.cc:
1566         Likewise.
1567         * testsuite/23_containers/vector/modifiers/insert_vs_emplace.cc:
1568         Remove dg-skip-if for profile mode.
1569         * testsuite/25_algorithms/binary_search/partitioned.cc: Likewise.
1570         * testsuite/25_algorithms/equal_range/partitioned.cc: Likewise.
1571         * testsuite/25_algorithms/lexicographical_compare/71545.cc: Likewise.
1572         * testsuite/25_algorithms/lower_bound/partitioned.cc: Likewise.
1573         * testsuite/25_algorithms/upper_bound/partitioned.cc: Likewise.
1574         * testsuite/Makefile.am: Remove profile_flags variable and
1575         * testsuite/Makefile.am: Remove profile_flags variable and
1576         check-profile target.
1577         * testsuite/Makefile.in: Regenerate.
1578         * testsuite/ext/profile/all.cc: Remove.
1579         * testsuite/ext/profile/mutex_extensions_neg.cc: Remove.
1580         * testsuite/ext/profile/profiler_algos.cc: Remove.
1581         * testsuite/ext/profile/replace_new.cc: Remove.
1582         * testsuite/ext/throw_allocator/deallocate_global.cc: Remove
1583         preprocessor check for profile mode.
1584         * testsuite/ext/throw_allocator/deallocate_local.cc: Likewise.
1585         * testsuite/lib/libstdc++.exp (check_v3_target_profile_mode): Remove.
1586         (check_v3_target_normal_mode): Do not check for profile mode macro.
1587         * testsuite/libstdc++-prettyprinters/80276.cc: Remove dg-skip-if for
1588         profile mode.
1589         * testsuite/libstdc++-prettyprinters/compat.cc: Likewise.
1590         * testsuite/libstdc++-prettyprinters/cxx11.cc: Likewise.
1591         * testsuite/libstdc++-prettyprinters/cxx17.cc: Likewise.
1592         * testsuite/libstdc++-prettyprinters/debug.cc: Likewise.
1593         * testsuite/libstdc++-prettyprinters/debug_cxx11.cc: Likewise.
1594         * testsuite/libstdc++-prettyprinters/libfundts.cc: Likewise.
1595         * testsuite/libstdc++-prettyprinters/simple.cc: Likewise.
1596         * testsuite/libstdc++-prettyprinters/simple11.cc: Likewise.
1597         * testsuite/libstdc++-prettyprinters/whatis.cc: Likewise.
1598         * testsuite/libstdc++-prettyprinters/whatis2.cc: Likewise.
1599
1600         Remove array_allocator extension, deprecated since 4.9.0
1601         * doc/xml/manual/allocator.xml: Remove documentation for
1602         array_allocator.
1603         * doc/xml/manual/evolution.xml: Document array_allocator removal.
1604         * doc/xml/manual/using.xml: Remove header from documentation.
1605         * include/Makefile.am: Remove <ext/array_allocator.h> header.
1606         * include/Makefile.in: Regenerate.
1607         * include/ext/array_allocator.h: Remove.
1608         * include/precompiled/extc++.h: Do not include removed header.
1609         * testsuite/ext/array_allocator/1.cc: Remove.
1610         * testsuite/ext/array_allocator/2.cc: Remove.
1611         * testsuite/ext/array_allocator/26875.cc: Remove.
1612         * testsuite/ext/array_allocator/3.cc: Remove.
1613         * testsuite/ext/array_allocator/check_deallocate_null.cc: Remove.
1614         * testsuite/ext/array_allocator/check_delete.cc: Remove.
1615         * testsuite/ext/array_allocator/check_new.cc: Remove.
1616         * testsuite/ext/array_allocator/variadic_construct.cc: Remove.
1617         * testsuite/ext/headers.cc: Do not include removed header.
1618
1619 2019-05-11  François Dumont  <fdumont@gcc.gnu.org>
1620
1621         * include/bits/stl_bvector.h
1622         (operator==(const _Bit_iterator_base&, const _Bit_iterator_base&)):
1623         Make hidden friend.
1624         (operator<(const _Bit_iterator_base&, const _Bit_iterator_base&)):
1625         Likewise.
1626         (operator!=(const _Bit_iterator_base&, const _Bit_iterator_base&)):
1627         Likewise.
1628         (operator>(const _Bit_iterator_base&, const _Bit_iterator_base&)):
1629         Likewise.
1630         (operator<=(const _Bit_iterator_base&, const _Bit_iterator_base&)):
1631         Likewise.
1632         (operator>=(const _Bit_iterator_base&, const _Bit_iterator_base&)):
1633         Likewise.
1634         (operator-(const _Bit_iterator_base&, const _Bit_iterator_base&)):
1635         Likewise.
1636         (_Bit_iterator::operator+(difference_type)): Likewise and allow NRVO
1637         copy elision.
1638         (_Bit_iterator::operator-(difference_type)): Likewise.
1639         (operator+(ptrdiff_t, const _Bit_iterator&)): Make hidden friend.
1640         (_Bit_const_iterator::operator+(difference_type)): Likewise and allow
1641         NRVO copy elision.
1642         (_Bit_const_iterator::operator-(difference_type)): Likewise.
1643         (operator+(ptrdiff_t, const _Bit_const_iterator&)): Make hidden friend.
1644
1645 2019-05-10  Jonathan Wakely  <jwakely@redhat.com>
1646
1647         PR libstdc++/81266
1648         * testsuite/util/thread/all.h: Do not use remove_pointer for
1649         std::thread::native_handle_type.
1650
1651         PR libstdc++/90397
1652         * include/std/variant (_Variant_storage<false, Types...>::_M_storage())
1653         (_Variant_storage<true, Types...>::_M_reset()))
1654         (_Variant_storage<true, Types...>::_M_storage())): Add noexcept.
1655         (__get_storage): Likewise.
1656         (variant): Add noexcept to friend declarations for __get and
1657         __get_storage.
1658
1659         PR libstdc++/90388
1660         * include/bits/unique_ptr.h (default_delete, default_delete<T[]>):
1661         Use _Require for constraints.
1662         (operator>(nullptr_t, const unique_ptr<T,D>&)): Implement exactly as
1663         per the standard.
1664         (__uniq_ptr_hash): New base class with conditionally-disabled call
1665         operator.
1666         (hash<unique_ptr<T,D>>): Derive from __uniq_ptr_hash.
1667         * testsuite/20_util/default_delete/48631_neg.cc: Adjust dg-error line.
1668         * testsuite/20_util/unique_ptr/hash/90388.cc: New test.
1669
1670         * include/bits/shared_ptr.h: Improve docs.
1671         * include/bits/shared_ptr_base.h: Likewise.
1672         * include/bits/stl_uninitialized.h: Likewise.
1673         * include/bits/unique_ptr.h: Likewise.
1674         * libsupc++/new: Likewise.
1675
1676 2019-05-09  François Dumont  <fdumont@gcc.gnu.org>
1677
1678         * include/bits/stl_deque.h
1679         (operator==(const _Deque_iterator<>&, const _Deque_iterator<>&)):
1680         Make hidden friend.
1681         (operator!=(const _Deque_iterator<>&, const _Deque_iterator<>&)):
1682         Likewise.
1683         (operator<(const _Deque_iterator<>&, const _Deque_iterator<>&)):
1684         Likewise.
1685         (operator<=(const _Deque_iterator<>&, const _Deque_iterator<>&)):
1686         Likewise.
1687         (operator>(const _Deque_iterator<>&, const _Deque_iterator<>&)):
1688         Likewise.
1689         (operator>=(const _Deque_iterator<>&, const _Deque_iterator<>&)):
1690         Likewise.
1691         (_Deque_iterator<>::operator+(difference_type)): Likewise and allow NRVO
1692         copy elision.
1693         (_Deque_iterator<>::operator-(difference_type)): Likewise.
1694
1695 2019-05-08  François Dumont  <fdumont@gcc.gnu.org>
1696
1697         PR libstdc++/90277
1698         * testsuite/23_containers/unordered_multiset/insert/24061-multiset.cc
1699         (test01): Reserve for number of insertions to avoid rehash during test.
1700         * testsuite/23_containers/unordered_multimap/insert/24061-multimap.cc
1701         (test01): Likewise.
1702         * testsuite/23_containers/unordered_multimap/insert/24061-multimap.cc
1703         (test01): Likewise.
1704         (test02): Likewise.
1705         (test03): Likewise.
1706
1707 2019-05-08  Jonathan Wakely  <jwakely@redhat.com>
1708
1709         * include/experimental/bits/fs_path.h: Improve docs.
1710         * include/experimental/bits/net.h: Fix wrong header name in comment.
1711         Do not document implementation details.
1712         * include/experimental/netfwd: Fix doxygen grouping.
1713
1714 2019-05-07  Jonathan Wakely  <jwakely@redhat.com>
1715
1716         * include/bits/stl_pair.h: Improve docs.
1717         * include/std/tuple: Likewise.
1718
1719         * doc/doxygen/doxygroups.cc (std::literals): Add documentation for
1720         inline namespace.
1721         * include/std/chrono: Improve docs.
1722         * include/std/ratio: Do not document implementation details.
1723         * testsuite/20_util/ratio/cons/cons_overflow_neg.cc: Adjust dg-error
1724         line numbers.
1725         * testsuite/20_util/ratio/operations/ops_overflow_neg.cc: Likewise.
1726
1727         PR libstdc++/89102
1728         * doc/xml/manual/intro.xml: Document DR 2408 and 2465 changes.
1729         * include/std/chrono (__duration_common_type_wrapper): Replace with ...
1730         (__duration_common_type): New helper.
1731         (common_type<chrono::duration<R1, P2>, chrono::duration<R2, P2>>): Use
1732         __duration_common_type.
1733         (__timepoint_common_type_wrapper): Replace with ...
1734         (__timepoint_common_type): New helper.
1735         (common_type<chrono::time_point<C, D2>, chrono::time_point<C, D2>>):
1736         Use __time_point_common_type.
1737         * include/std/type_traits (common_type<>): Define, as per LWG 2408.
1738         (__common_type_impl): If either argument is transformed by decay,
1739         use the common_type of the decayed types.
1740         (__common_type_impl<_Tp, _Up, _Tp, _Up>): If the types are already
1741         decayed, use __do_common_type_impl to get the common_type.
1742         (common_type<_Tp>): Use common_type<_Tp, _Tp>.
1743         (__do_member_type_wrapper, __member_type_wrapper)
1744         (__expanded_common_type_wrapper): Remove.
1745         (__common_type_pack, __common_type_fold): New helpers.
1746         (common_type<_Tp, _Up, _Vp...>): Use new helpers instead of
1747         __member_type_wrapper and __expanded_common_type_wrapper.
1748         * testsuite/20_util/common_type/requirements/explicit_instantiation.cc:
1749         Test zero-length template argument list.
1750         * testsuite/20_util/common_type/requirements/sfinae_friendly_1.cc:
1751         Test single argument cases and argument types that should decay.
1752         * testsuite/20_util/common_type/requirements/sfinae_friendly_2.cc:
1753         Adjust expected error.
1754         * testsuite/20_util/duration/literals/range_neg.cc: Use zero for
1755         dg-error lineno.
1756         * testsuite/20_util/duration/requirements/typedefs_neg1.cc: Likewise.
1757         * testsuite/20_util/duration/requirements/typedefs_neg2.cc: Likewise.
1758         * testsuite/20_util/duration/requirements/typedefs_neg3.cc: Likewise.
1759
1760         * doc/xml/manual/intro.xml: Fix DR 2537 and DR 2566 confusion.
1761
1762 2019-05-01  Nina Dinka Ranns  <dinka.ranns@gmail.com>
1763
1764         Make allocator propagation more consistent for
1765         operator+(basic_string) (P1165R1)
1766         * include/bits/basic_string.h
1767         (operator+(basic_string&&, basic_string&&): Changed resulting
1768         allocator to always be the one from the first parameter.
1769         * include/bits/basic_string.tcc
1770         (operator+(const _CharT*, const basic_string&)): Changed
1771         resulting allocator to be SOCCC on the second parameter's allocator.
1772         (operator+(_CharT, const basic_string&)): Likewise.
1773         * testsuite/21_strings/basic_string/allocator/char/operator_plus.cc:
1774         New.
1775         * testsuite/21_strings/basic_string/allocator/wchar_t/operator_plus.cc:
1776         New.
1777
1778 2019-05-07  Jonathan Wakely  <jwakely@redhat.com>
1779
1780         * include/bits/regex.h: Improve docs.
1781         * include/bits/regex.tcc: Do not document implementation details.
1782
1783         * testsuite/19_diagnostics/error_code/hash.cc: New test.
1784
1785 2019-05-06  François Dumont  <fdumont@gcc.gnu.org>
1786
1787         * python/libstdcxx/v6/printers.py (add_one_template_type_printer):
1788         Add type printer for container types in std::__debug namespace.
1789         * testsuite/lib/gdb-test.exp (whatis-regexp-test): New.
1790         (gdb-tests): Use distinct parameters for the type of test and use of
1791         regex.
1792         (gdb-test): Check for regex test even if 'whatis' test.
1793         * testsuite/libstdc++-prettyprinters/80276.cc: Adapt for _GLIBCXX_DEBUG
1794         mode.
1795         * testsuite/libstdc++-prettyprinters/cxx11.cc: Likewise.
1796         * testsuite/libstdc++-prettyprinters/cxx17.cc: Likewise.
1797         * testsuite/libstdc++-prettyprinters/libfundts.cc: Likewise.
1798         * testsuite/libstdc++-prettyprinters/simple.cc: Likewise.
1799         * testsuite/libstdc++-prettyprinters/simple11.cc: Likewise.
1800         * testsuite/libstdc++-prettyprinters/whatis.cc: Likewise.
1801         * testsuite/libstdc++-prettyprinters/whatis2.cc: Likewise.
1802
1803 2019-05-04  Jonathan Wakely  <jwakely@redhat.com>
1804
1805         * include/std/system_error (error_category): Fix comment.
1806
1807         PR libstdc++/90299
1808         * src/c++17/fs_ops.cc (absolute(const path&)): Report an error if the
1809         argument is an empty path.
1810         (absolute(const path&, error_code&)): Use invalid_argument as error
1811         code instead of no_such_file_or_directory.
1812         * testsuite/27_io/filesystem/operations/absolute.cc: Check handling
1813         of non-existent paths and empty paths with both overloads of absolute.
1814
1815         * include/std/system_error (error_category, error_code)
1816         (error_condition): Improve docs.
1817         * libsupc++/exception: Add missing @addtogroup Doxygen command.
1818         * libsupc++/exception_ptr.h (exception_ptr): Link equality operators
1819         to class documentation. Suppress documentation for implementation
1820         details.
1821         * libsupc++/nested_exception.h (throw_with_nested, rethrow_if_nested):
1822         Suppress documentation for implementation details.
1823
1824         * include/std/system_error (error_code): Remove friend declaration
1825         for hash<error_code>.
1826         (hash<error_code>::operator()): Use public member functions to access
1827         value and category.
1828         (hash<error_condition>::operator()): Use address of category, not
1829         its object representation.
1830         * src/c++11/compatibility-c++0x.cc (hash<error_code>::operator()):
1831         Use public member functions to access value and category.
1832         * testsuite/19_diagnostics/error_condition/hash.cc: New test.
1833
1834 2019-05-04  François Dumont  <fdumont@gcc.gnu.org>
1835
1836         * include/bits/hashtable.h (_Hashtable<>::rehash): Review comment.
1837         * include/bits/hashtable_policy.h
1838         (_Prime_rehash_policy::_M_bkt_for_elements): Use __builtin_ceill.
1839         (_Power2_rehash_policy::_M_bkt_for_elements): Likewise.
1840         (_Power2_rehash_policy::_M_next_bkt): Enforce returning a result not
1841         smaller than input value rather than always greater. Preserve
1842         _M_next_resize if called with 0 input. Use __builtin_floorl.
1843         (_Power2_rehash_policy::_M_need_rehash): Rehash only if number of
1844         elements + number of insertions is greater than _M_next_resize. Start
1845         with 11 buckets if not told otherwise. Use __builtin_floorl.
1846         (_Rehash_base<>::reserve): Use rehash policy _M_bkt_for_elements.
1847         * src/c++11/hashtable_c++0x.cc (_Prime_rehash_policy::_M_next_bkt):
1848         Preserve _M_next_resize if called with 0 input. Use __builtin_floorl.
1849         (_Prime_rehash_policy::_M_need_rehash): Start with 11 buckets if not
1850         told otherwise. Use __builtin_floorl.
1851         * testsuite/23_containers/unordered_set/hash_policy/71181.cc: Adapt test
1852         to also validate _Power2_rehash_policy.
1853         * testsuite/23_containers/unordered_set/hash_policy/power2_rehash.cc:
1854         Adapt.
1855
1856 2019-05-03  Jonathan Wakely  <jwakely@redhat.com>
1857
1858         PR libstdc++/61761
1859         * testsuite/26_numerics/complex/proj.cc: Don't assume <cmath> defines
1860         std::copysign.
1861
1862         PR libstdc++/52119
1863         * include/ext/numeric_traits.h (__glibcxx_min): Avoid integer
1864         overflow warning with -Wpedantic -Wsystem-headers.
1865
1866 2019-05-02  Jonathan Wakely  <jwakely@redhat.com>
1867
1868         PR libstdc++/90314
1869         * include/bits/c++config (_GLIBCXX_NOEXCEPT_IF): Use variadic macro.
1870         * include/bits/move.h (swap): Remove extra parentheses.
1871
1872         * include/experimental/bits/lfts_config.h: Improve doc markup.
1873         * include/experimental/optional: Improve docs.
1874         (_Has_addressof_mem, _Has_addressof_free, _Has_addressof)
1875         (__constexpr_addressof): Remove.
1876         (optional::operator->()): Use std::__addressof().
1877         * include/std/optional (optional::operator->()): Adjust whitespace.
1878         * testsuite/experimental/optional/constexpr/observers/2.cc: Check
1879         that operator-> is still constexpr with overloaded operator&. Change
1880         to compile-only test.
1881         * testsuite/experimental/optional/constexpr/observers/3.cc: Change to
1882         compile-only test.
1883
1884         * include/bits/shared_ptr.h: Improve docs.
1885         * include/bits/shared_ptr_atomic.h: Likewise.
1886         * include/bits/unique_ptr.h: Likewise. Adjust whitespace.
1887
1888         * include/bits/basic_string.h: Fix iterator/index confusion in
1889         Doxygen comments.
1890         * include/bits/range_access.h: Fix Doxygen warnings.
1891         * include/bits/refwrap.h: Do not document implementation details.
1892         (ref, cref): Group docs with reference_wrapper.
1893         * include/std/fstream: Fix Doxygen markup.
1894         * libsupc++/initializer_list (begin, end): Group docs with
1895         initializer_list.
1896
1897         * doc/doxygen/user.cfg.in: Set MARKDOWN_SUPPORT=YES.
1898
1899         * include/bits/unique_lock.h: Fix/improve doxygen markup.
1900         * include/std/mutex: Likewise.
1901         * include/std/shared_mutex: Likewise.
1902
1903         * include/bits/fs_dir.h: Fix/improve doxygen markup.
1904         * include/bits/fs_fwd.h: Likewise.
1905         * include/bits/fs_ops.h: Likewise.
1906         * include/bits/fs_path.h: Likewise.
1907         * include/std/filesystem: Likewise.
1908
1909         * include/experimental/bits/net.h: Fix/improve doxygen markup.
1910         * include/experimental/buffer: Likewise.
1911         * include/experimental/executor: Likewise.
1912         * include/experimental/internet: Likewise.
1913         * include/experimental/io_context: Likewise.
1914         * include/experimental/net: Likewise.
1915         * include/experimental/netfwd: Likewise.
1916         * include/experimental/socket: Likewise.
1917         * include/experimental/timer: Likewise.
1918
1919         * doc/doxygen/doxygroups.cc: Move description of experimental group
1920         here.
1921         * include/experimental/algorithm: Add to libfund-ts doc group.
1922         * include/experimental/any: Likewise. Do not document implementation
1923         details.
1924         * include/experimental/array: Add to libfund-ts doc group.
1925         * include/experimental/bits/lfts_config.h: Define libfund-ts doc group
1926         for Library Fundamentals.
1927         * include/experimental/chrono: Add to libfund-ts doc group.
1928         * include/experimental/deque: Likewise.
1929         * include/experimental/forward_list: Likewise.
1930         * include/experimental/functional: Likewise.
1931         * include/experimental/iterator: Likewise.
1932         * include/experimental/list: Likewise.
1933         * include/experimental/map: Likewise.
1934         * include/experimental/memory: Likewise.
1935         * include/experimental/memory_resource: Likewise. Improve docs.
1936         details.
1937         * include/experimental/numeric: Add to libfund-ts doc group.
1938         * include/experimental/optional: Likewise.
1939         * include/experimental/propagate_const: Likewise.
1940         * include/experimental/random: Likewise.
1941         * include/experimental/ratio: Likewise.
1942         * include/experimental/regex: Likewise.
1943         * include/experimental/set: Likewise.
1944         * include/experimental/source_location: Likewise.
1945         * include/experimental/string: Likewise.
1946         * include/experimental/string_view: Likewise.
1947         * include/experimental/system_error: Likewise.
1948         * include/experimental/tuple: Likewise.
1949         * include/experimental/type_traits: Likewise.
1950         * include/experimental/unordered_map: Likewise.
1951         * include/experimental/unordered_set: Likewise.
1952         * include/experimental/utility: Likewise.
1953         * include/experimental/vector: Likewise.
1954         * testsuite/experimental/any/misc/any_cast_neg.cc: Adjust dg-error.
1955         * testsuite/experimental/array/neg.cc: Adjust dg-error.
1956         * testsuite/experimental/propagate_const/assignment/move_neg.cc:
1957         Likewise.
1958         * testsuite/experimental/propagate_const/cons/move_neg.cc: Likewise.
1959         * testsuite/experimental/propagate_const/requirements2.cc: Likewise.
1960         * testsuite/experimental/propagate_const/requirements3.cc: Likewise.
1961         * testsuite/experimental/propagate_const/requirements4.cc: Likewise.
1962         * testsuite/experimental/propagate_const/requirements5.cc: Likewise.
1963
1964         * include/experimental/bits/fs_dir.h: Fix Doxygen markup.
1965         * include/experimental/bits/fs_fwd.h: Improve docs.
1966         * include/experimental/bits/fs_ops.h: fix Doxygen markup.
1967         * include/experimental/bits/fs_path.h: Likewise.
1968         (path, filesystem_error, u8path): Improve docs.
1969         * include/experimental/filesystem: Link to docs for TS.
1970
1971         * config/allocator/new_allocator_base.h (__allocator_base): Add
1972         workaround for Doxygen bug #6945.
1973         * include/std/memory: Improve docs. Define group for pointer safety.
1974         * include/std/scoped_allocator: Improve docs. Use "undocumented"
1975         conditional to suppress documentation for implementation details.
1976
1977         * include/bits/specfun.h: Improve docs.
1978         * include/tr1/cmath: Likewise. Fix nesting of preprocessor conditions
1979         and namespaces.
1980
1981         * doc/doxygen/doxygroups.cc (std::tr2, std::__gnu_cxx): Improve docs.
1982         (std::experimental): Add docs.
1983         * doc/doxygen/user.cfg.in (PREDEFINED): Expand macros for __cxx11
1984         namespace to nothing when generating docs.
1985         * include/bits/regex_constants.h (std::regex_constants): Improve docs.
1986         * include/std/chrono (std::chrono): Likewise.
1987         * include/std/functional (std::placeholders): Likewise.
1988         * include/std/thread (std::this_thread): Likewise.
1989
1990         * include/parallel/settings.h: Fix Doxygen markup.
1991
1992         * include/ext/pb_ds/detail/bin_search_tree_/*_imps.hpp: Do not define
1993         anything unless PB_DS_CLASS_C_DEC is defined.
1994         * include/ext/pb_ds/detail/binary_heap_/*_imps.hpp: Likewise.
1995         * include/ext/pb_ds/detail/binomial_heap_/*_imps.hpp: Likewise.
1996         * include/ext/pb_ds/detail/binomial_heap_base_/*_imps.hpp: Likewise.
1997         * include/ext/pb_ds/detail/cc_hash_table_map_/*_imps.hpp: Likewise.
1998         * include/ext/pb_ds/detail/gp_hash_table_map_/*_imps.hpp: Likewise.
1999         * include/ext/pb_ds/detail/hash_fn/*_imp.hpp: Likewise.
2000         * include/ext/pb_ds/detail/left_child_next_sibling_heap_/*_imps.hpp:
2001         Likewise.
2002         * include/ext/pb_ds/detail/list_update_map_/*_imps.hpp: Likewise.
2003         * include/ext/pb_ds/detail/ov_tree_map_/*_imps.hpp: Likewise.
2004         * include/ext/pb_ds/detail/pairing_heap_/*_imps.hpp: Likewise.
2005         * include/ext/pb_ds/detail/pat_trie_/*_imps.hpp: Likewise.
2006         * include/ext/pb_ds/detail/rb_tree_map_/*_imps.hpp: Likewise.
2007         * include/ext/pb_ds/detail/rc_binomial_heap_/*_imps.hpp: Likewise.
2008         * include/ext/pb_ds/detail/resize_policy*_imp.hpp: Likewise.
2009         * include/ext/pb_ds/detail/splay_tree_/*_imps.hpp: Likewise.
2010         * include/ext/pb_ds/detail/thin_heap_/*_imps.hpp: Likewise.
2011         * include/ext/pb_ds/detail/trie_policy*_imp.hpp: Likewise.
2012         * include/ext/pb_ds/detail/unordered_iterator/const_iterator.hpp:
2013         Likewise.
2014         * include/ext/pb_ds/detail/unordered_iterator/iterator.hpp: Likewise.
2015         * include/ext/pb_ds/detail/unordered_iterator/point_const_iterator.hpp:
2016         Likewise.
2017         * include/ext/pb_ds/detail/unordered_iterator/point_iterator.hpp:
2018         Likewise.
2019
2020         * doc/doxygen/user.cfg.in: Regenerate with Doxygen 1.8.14 and set
2021         GROUP_NESTED_COMPOUNDS=YES and SORT_BY_SCOPE_NAME=NO. Add various
2022         _GLIBCXX_xxx macros and __attribute__(X) to PREDEFINED macros that
2023         Doxygen expands.
2024
2025 2019-05-01  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
2026
2027         * config/abi/post/i386-solaris2.10/baseline_symbols.txt: Regenerate.
2028         * config/abi/post/i386-solaris2.10/amd64/baseline_symbols.txt: Likewise.
2029         * config/abi/post/i386-solaris2.11/baseline_symbols.txt: Likewise.
2030         * config/abi/post/i386-solaris2.11/amd64/baseline_symbols.txt: Likewise.
2031         * config/abi/post/sparc-solaris2.10/baseline_symbols.txt: Likewise.
2032         * config/abi/post/sparc-solaris2.10/sparcv9/baseline_symbols.txt:
2033         Likewise.
2034         * config/abi/post/sparc-solaris2.11/baseline_symbols.txt: Likewise.
2035         * config/abi/post/sparc-solaris2.11/sparcv9/baseline_symbols.txt:
2036         Likewise.
2037
2038 2019-05-01  Jonathan Wakely  <jwakely@redhat.com>
2039
2040         PR libstdc++/61761
2041         * include/std/complex (__complex_proj): Return parameter unchanged.
2042         [_GLIBCXX_USE_C99_COMPLEX] (__complex_proj): Change overloads for
2043         floating-point types to take std::complex arguments.
2044         [_GLIBCXX_USE_C99_MATH_TR1] (__complex_proj): Add overloads for
2045         floating-point types.
2046         * testsuite/26_numerics/complex/proj.cc: New test.
2047
2048 2019-04-30  Jakub Jelinek  <jakub@redhat.com>
2049
2050         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Change _Lock_policyE2 exports
2051         to _Lock_policyE[012].
2052         * config/abi/post/riscv64-linux-gnu/baseline_symbols.txt: Update.
2053
2054 2019-04-30  Jonathan Wakely  <jwakely@redhat.com>
2055
2056         * testsuite/27_io/filesystem/path/decompose/root_path.cc: Remove
2057         macros accidentally left in.
2058         * testsuite/27_io/filesystem/path/native/string-char8_t.cc: Remove
2059         unnecessary -lstdc++fs option. Fix test for mingw.
2060         * testsuite/experimental/filesystem/path/native/string-char8_t.cc:
2061         Fix test for mingw.
2062
2063 2019-04-30  Jakub Jelinek  <jakub@redhat.com>
2064
2065         * config/abi/post/riscv64-linux-gnu/baseline_symbols.txt: Update.
2066
2067 2019-04-29  Jonathan Wakely  <jwakely@redhat.com>
2068
2069         * include/bits/stl_algo.h (generate_n): Adjust doxygen comment.
2070
2071         * include/bits/move.h (swap(T&, T&), swap(T (&)[N], T (&)[N])): Use
2072         _GLIBCXX_NOEXCEPT_IF to simplify declarations.
2073
2074         PR libstdc++/71312
2075         * src/c++11/shared_ptr.cc (get_mutex): Align pool mutexes to 64 bytes.
2076
2077         * include/bits/stl_bvector.h (vector<bool>::empty()): Add nodiscard
2078         attribute.
2079
2080         * include/bits/stl_iterator_base_types.h (_Iter_base): Remove unused
2081         class template and partial specialization.
2082
2083         PR libstdc++/87982
2084         * include/bits/stl_algo.h (generate_n): Convert _Size parameter to
2085         an integral type.
2086         * include/bits/stl_algobase.h (__size_to_integer): New overloaded
2087         functions to convert a value to an integral type.
2088         (__fill_n_a, __fill_n_a): Assert that __n is already an integral type.
2089         (fill_n): Convert _Size parameter to an integral type.
2090         * testsuite/25_algorithms/fill_n/87982.cc: New test.
2091         * testsuite/25_algorithms/fill_n/87982_neg.cc: New test.
2092         * testsuite/25_algorithms/fill_n/dr426.cc: New test.
2093         * testsuite/25_algorithms/generate_n/87982.cc: New test.
2094         * testsuite/25_algorithms/generate_n/87982_neg.cc: New test.
2095         * testsuite/25_algorithms/generate_n/dr426.cc: New test.
2096
2097 2019-04-28  Nina Dinka Ranns  <dinka.ranns@gmail.com>
2098
2099         Adding noexcept-specification on tuple constructors (LWG 2899)
2100         * libstdc++-v3/include/std/tuple:
2101         (tuple()): Add noexcept-specification.
2102         (tuple(const _Elements&...)): Likewise
2103         (tuple(_UElements&&...)): Likewise
2104         (tuple(const tuple<_UElements...>&)): Likewise
2105         (tuple(tuple<_UElements...>&&)): Likewise
2106         (tuple(const _T1&, const _T2&)): Likewise
2107         (tuple(_U1&&, _U2&&)): Likewise
2108         (tuple(const tuple<_U1, _U2>&): Likewise
2109         (tuple(tuple<_U1, _U2>&&): Likewise
2110         (tuple(const pair<_U1, _U2>&): Likewise
2111         (tuple(pair<_U1, _U2>&&): Likewise
2112         * libstdc++-v3/testsuite/20_util/tuple/cons/noexcept_specs.cc: New
2113
2114 2019-04-27  Marc Glisse  <marc.glisse@inria.fr>
2115
2116         PR libstdc++/87106
2117         * include/bits/stl_uninitialized.h (__relocate_object_a): Mark the
2118         arguments with __restrict.
2119
2120 2019-04-26  H.J. Lu  <hongjiu.lu@intel.com>
2121
2122         * config/abi/post/x86_64-linux-gnu/x32/baseline_symbols.txt: Updated.
2123
2124 2019-04-26  Jonathan Wakely  <jwakely@redhat.com>
2125
2126         * include/experimental/bits/fs_path.h
2127         (path::_S_convert_loc<_InputIterator>): Create const std::string to
2128         avoid redundant call to _S_convert_loc with non-const pointers.
2129
2130         * testsuite/20_util/variant/run.cc: Use a new Hashable type to test
2131         hashing, because pmr::string depends on _GLIBCXX_USE_CXX11_ABI==1.
2132         * testsuite/21_strings/basic_string/hash/hash.cc
2133         [!_GLIBCXX_USE_CXX11_ABI]: Don't test pmr strings.
2134         * testsuite/21_strings/basic_string/hash/hash_char8_t.cc
2135         [!_GLIBCXX_USE_CXX11_ABI]: Likewise.
2136
2137         * config/abi/pre/gnu.ver (GLIBCXX_3.4): Replace wildcard that matches
2138         wstring::_M_replace_dispatch with more specific patterns.
2139         * include/bits/fs_path.h (path::_S_convert_loc<_InputIterator>):
2140         Create const std::string to avoid redundant call to _S_convert_loc
2141         with non-const pointers.
2142         * include/bits/locale_conv.h (__do_str_codecvt): Use if-constexpr to
2143         avoid unnecessary basic_string::assign instantiations.
2144
2145         * include/std/memory (__uses_alloc_args): Add string-literal to
2146         static_assert, to match the one in __uses_alloc.
2147         [__cpp_concepts] (_Std_pair): Use C++2a syntax for concept.
2148         * testsuite/20_util/polymorphic_allocator/construct_c++2a.cc: Check
2149         for recursive uses-allocator construction of nested pairs.
2150         * testsuite/20_util/scoped_allocator/construct_pair_c++2a.cc:: Add
2151         comment.
2152
2153 2019-04-26  Jakub Jelinek  <jakub@redhat.com>
2154
2155         * config/abi/post/s390x-linux-gnu/32/baseline_symbols.txt: Update.
2156         * config/abi/post/s390-linux-gnu/baseline_symbols.txt: Update.
2157         * config/abi/post/powerpc-linux-gnu/baseline_symbols.txt: Update.
2158         * config/abi/post/powerpc64-linux-gnu/32/baseline_symbols.txt: Update.
2159
2160         * config/abi/post/x86_64-linux-gnu/baseline_symbols.txt: Update.
2161         * config/abi/post/x86_64-linux-gnu/32/baseline_symbols.txt: Update.
2162         * config/abi/post/i386-linux-gnu/baseline_symbols.txt: Update.
2163         * config/abi/post/i486-linux-gnu/baseline_symbols.txt: Update.
2164         * config/abi/post/aarch64-linux-gnu/baseline_symbols.txt: Update.
2165         * config/abi/post/s390x-linux-gnu/baseline_symbols.txt: Update.
2166         * config/abi/post/powerpc64-linux-gnu/baseline_symbols.txt: Update.
2167
2168 2019-04-25  Jonathan Wakely  <jwakely@redhat.com>
2169
2170         PR libstdc++/90239
2171         * doc/xml/manual/status_cxx2020.xml: Amend P0591R4 status.
2172         * include/std/scoped_allocator [__cplusplus > 201703L]
2173         (scoped_allocator_adaptor::construct): Define in terms of
2174         uses_allocator_construction_args, as per P0591R4.
2175         * testsuite/20_util/scoped_allocator/construct_pair_c++2a.cc: New test.
2176         * testsuite/util/testsuite_allocator.h: Remove name of unused
2177         parameter.
2178
2179 2019-04-24  Jonathan Wakely  <jwakely@redhat.com>
2180
2181         * doc/xml/manual/status_cxx2017.xml: Document P0024R2 status.
2182         * doc/html/*: Regenerate.
2183
2184         * include/bits/fs_path.h (operator<, operator<=, operator>)
2185         (operator>=, operator==, operator!=): Make hidden friends, as per
2186         LWG 3065.
2187         * testsuite/27_io/filesystem/path/native/string-char8_t.cc: Fix
2188         string type in test.
2189         * testsuite/27_io/filesystem/path/native/string.cc: Likewise.
2190
2191         * include/std/any (any::any(ValueType&&)): Use __and_v.
2192         * include/std/numeric (midpoint(T, T, T), midpoint(T*, T*, T*)):
2193         Likewise.
2194
2195         * include/std/tuple (apply): Use remove_reference_t instead of decay_t
2196         as per P0777R1.
2197         * include/std/type_traits (__result_of_memfun): Use remove_reference
2198         instead of __remove_cvref_t and remove redundant is_same check.
2199         (__inv_unwrap): Use __remove_cvref_t instead of decay_t.
2200
2201         * include/experimental/string_view (basic_string_view::pointer)
2202         (basic_string_view::reference): Fix to refer to non-const value_type.
2203         * include/bits/basic_string.h (basic_string): Use __sv_check and
2204         __sv_limit instead of basic_string_view::_M_check and
2205         basic_string_view::_M_limit.
2206         * include/std/string_view (__sv_check, __sv_limit): New
2207         helper functions to replace basic_string_view::_M_check and
2208         basic_string_view::_M_limit.
2209         (basic_string_view): Add static assertions to enforce ill-formed
2210         requirement for traits_type::char_type from P1148R0, and to enforce
2211         required properties of char-like types.
2212         (basic_string_view::pointer, basic_string_view::reference): Fix to
2213         refer to non-const value_type.
2214         (basic_string_view::operator[], basic_string_view::at)
2215         (basic_string_view::front, basic_string_view::back)
2216         (basic_string_view::data): Use const_reference and const_pointer
2217         typedefs for return types.
2218         (basic_string_view::_M_check, basic_string_view::_M_limit): Remove.
2219         (hash<wstring_view>): Fix argument_type typedef.
2220         * testsuite/21_strings/basic_string_view/modifiers/remove_prefix/
2221         char/1.cc: Fix expected return type of basic_string_view::data().
2222         * testsuite/21_strings/basic_string_view/modifiers/remove_prefix/
2223         wchar_t/1.cc: Likewise.
2224         * testsuite/21_strings/basic_string_view/modifiers/remove_suffix/
2225         char/1.cc: Likewise.
2226         * testsuite/21_strings/basic_string_view/modifiers/remove_suffix/
2227         wchar_t/1.cc: Likewise.
2228         * testsuite/21_strings/basic_string_view/requirements/traits_neg.cc:
2229         New test.
2230         * testsuite/21_strings/basic_string_view/requirements/typedefs.cc:
2231         Check reference and pointer typedefs.
2232         * testsuite/experimental/string_view/requirements/typedefs.cc:
2233         Likewise.
2234         * testsuite/experimental/string_view/modifiers/remove_prefix/char/1.cc:
2235         Fix expected return type of basic_string_view::data().
2236         * testsuite/experimental/string_view/modifiers/remove_prefix/wchar_t/
2237         1.cc: Likewise.
2238         * testsuite/experimental/string_view/modifiers/remove_suffix/char/1.cc:
2239         Likewise.
2240         * testsuite/experimental/string_view/modifiers/remove_suffix/wchar_t/
2241         1.cc: Likewise.
2242
2243         PR libstdc++/90220
2244         * include/std/any (__any_caster): Use remove_cv_t instead of decay_t.
2245         Avoid a runtime check for types that can never be stored in std::any.
2246         * testsuite/20_util/any/misc/any_cast.cc: Test std::any_cast with
2247         array types.
2248
2249         PR libstdc++/90220 (partial)
2250         * include/std/any (any_cast<T>(any*), any_cast<T>(const any*)): Do
2251         not attempt ill-formed static_cast to pointers to non-object types.
2252         * testsuite/20_util/any/misc/any_cast.cc: Test std::any_cast with
2253         function types.
2254
2255         * testsuite/20_util/variant/run.cc: Catch exception by reference to
2256         prevent -Wcatch-value warning.
2257
2258         * include/std/variant (__variant_construct): Use template parameter
2259         type instead of equivalent decltype-specifier.
2260         (_Move_ctor_base<false, Types...>::_Move_ctor_base(_Move_ctor_base&&)):
2261         Replace forward with move.
2262         (_Move_ctor_base<false, Types...>::_M_destructive_move)
2263         (_Move_ctor_base<false, Types...>::_M_destructive_copy)
2264         (_Move_ctor_base<true, Types...>::_M_destructive_move)
2265         (_Move_ctor_base<true, Types...>::_M_destructive_copy): Only set the
2266         index after construction succeeds.
2267         (_Copy_assign_base<false, Types...>::operator=): Remove redundant
2268         if-constexpr checks that are always true. Use __remove_cvref_t instead
2269         of remove_reference so that is_nothrow_move_constructible check
2270         doesn't use a const rvalue parameter. In the potentially-throwing case
2271         construct a temporary and move assign it, as per LWG 2904.
2272         (_Move_assign_base<false, Types...>::operator=): Remove redundant
2273         if-constexpr checks that are always true. Use emplace as per LWG 2904.
2274         (variant::operator=(T&&)): Only use emplace conditionally, otherwise
2275         construct a temporary and move assign from it, as per LWG 2904.
2276         * testsuite/20_util/variant/exception_safety.cc: Check that
2277         assignment operators have strong exception safety guarantee.
2278
2279 2019-04-23  Thomas Rodgers <trodgers@redhat.com>
2280
2281         Document PSTL linker flags
2282
2283         * doc/xml/manual/using.xml: Add PSTL linker flags to table 3.1.
2284
2285 2019-04-23  Jonathan Wakely  <jwakely@redhat.com>
2286
2287         * include/std/variant (__detail::__variant::_Traits): Make
2288         _S_trivial_copy_assign depend on _S_trivial_copy_ctor and make
2289         _S_trivial_move_assign depend on _S_trivial_move_ctor, as per
2290         P0602R4.
2291         (__detail::__variant::_Copy_assign_alias): Only depend on
2292         _S_trivial_copy_assign, which subsumes _S_trivial_copy_ctor now.
2293         * testsuite/20_util/variant/compile.cc: Correct checks for trivial
2294         move assignment operators.
2295
2296         PR libstdc++/90165
2297         * include/std/variant (variant::__not_self): New helper for the
2298         is_same_v<remove_cvref_t<T>, variant>==false constraints.
2299         (variant::__to_type_impl): Remove.
2300         (variant::__to_type): Add default argument to check pack size, instead
2301         of using __to_type_impl.
2302         (variant::__accepted_type): Add default argument using __not_self.
2303         (variant::__is_in_place_tag, variant::__not_in_place_tag): New helpers
2304         for variant(T&&) constructor constraint.
2305         (variant::variant(T&&)): Use __not_in_place_tag in constraints.
2306         Extract __accepted_type into a named template parameter for reuse in
2307         other constraints and in the exception specification.
2308         (variant::variant(in_place_type_t<T>, Args&&...))
2309         (variant::variant(in_place_type_t<T>, initializer_list<U>, Args&&...))
2310         (variant::variant(in_place_index_t<T>, Args&&...))
2311         (variant::variant(in_place_index_t<T>, initializer_list<U>, Args&&...))
2312         (variant::operator=T&&)): Remove redundant && from trait arguments.
2313         * testsuite/20_util/variant/compile.cc: Check variant(T&&) constructor
2314         isn't used for in_place_type or in_place_index arguments.
2315
2316         * include/std/type_traits (unwrap_reference_t): Define for C++2a.
2317         (unwrap_ref_decay): Remove inheritance from unwrap_reference.
2318         * testsuite/20_util/unwrap_reference/1.cc: Adjust test to use alias.
2319
2320 2019-04-23  Ramana Radhakrishnan  <ramana.radhakrishnan@arm.com>
2321             Bernd Edlinger  <bernd.edlinger@hotmail.de>
2322             Jakub Jelinek  <jakub@redhat.com>
2323
2324         PR target/89093
2325         * libsupc++/eh_personality.cc (PERSONALITY_FUNCTION): Add
2326         general-regs-only target attribute for ARM.
2327
2328 2019-04-23  Jonathan Wakely  <jwakely@redhat.com>
2329
2330         PR libstdc++/87431
2331         * include/bits/basic_string.h (_Never_valueless_alt): Make partial
2332         specialization also depend on is_nothrow_move_constructible.
2333         * include/std/variant (__detail::__variant::__never_valueless()):
2334         Only true if the variant would have a move assignment operator.
2335         (__detail::__variant::_Variant_storage<false, T...>::_M_valid()):
2336         Check __never_valueless<T...>().
2337         (variant::emplace): Only perform non-throwing move assignments
2338         for never-valueless alternatives if the variant has a move assignment
2339         operator.
2340         * testsuite/20_util/variant/compile.cc: Check that never-valueless
2341         types can be emplaced into non-assignable variants.
2342         * testsuite/20_util/variant/run.cc: Check that never-valueless types
2343         don't get copied when emplaced into non-assignable variants.
2344
2345         * include/std/variant (__detail::__variant::__ref_cast): Remove
2346         unused function.
2347         (__detail::__variant::_Uninitialized::_M_get)
2348         (__detail::__variant::__get)
2349         (__gen_vtable_impl::__element_by_index_or_cookie): Add noexcept.
2350
2351 2019-04-21  Iain Sandoe  <iain@sandoe.co.uk>
2352
2353         * testsuite/17_intro/headers/c++1998/charset.cc: Skip for Darwin8
2354         to Darwin10.
2355         * testsuite/17_intro/headers/c++2011/charset.cc: Likewise.
2356         * testsuite/17_intro/headers/c++2014/charset.cc: Likewise.
2357         * testsuite/17_intro/headers/c++2017/charset.cc: Likewise.
2358         * testsuite/17_intro/headers/c++2020/charset.cc: Likewise.
2359
2360 2019-04-20  Thomas Rodgers <trodgers@redhat.com>
2361
2362         Delegate PSTL configuration to pstl/pstl_config.h
2363
2364         * include/bits/c++config: Remove explicit PSTL configuration
2365         macros and use definitions from <pstl/pstl_config.h>.
2366
2367 2019-04-20  Thomas Rodgers <trodgers@redhat.com>
2368
2369         Cleanup algorithm implementations
2370         * include/pstl/glue_algorithm_impl.h (stable_sort): Forward
2371         execution policy.
2372         (mismatch): Forward execution policy.
2373         (equal): Qualify call to std::equal().
2374         (partial_sort): Forward execution policy.
2375         (inplace_merge): Forward execution policy.
2376
2377 2019-04-19  Thomas Rodgers <trodgers@redhat.com>
2378
2379         Improve implementation of parallel equal()
2380         * include/pstl/algorithm_impl.h
2381         (__internal::__brick_equal): use "4 iterator" version of
2382         std::equal().
2383         (__internal::__brick_equal): use simd for random access
2384         iterators on unsequenced execution policies.
2385         (__internal::__pattern_equal): add "4 iterator" version
2386         (__internal::__pattern_equal): dispatch to simd __brick_equal
2387         for vector-only execution policies.
2388         (__internal::__pattern_equal): dispatch to __parallel_or for
2389         parallel execution policies.
2390         * include/pstl/glue_algorithm_impl.h
2391         (std::equal): dispatch to "4 iterator" version of
2392         __internal::__pattern_equal().
2393
2394 2019-04-17  Jonathan Wakely  <jwakely@redhat.com>
2395
2396         PR libstdc++/90105
2397         * include/bits/forward_list.h (operator==): Do not use operator!= to
2398         compare elements.
2399         (forward_list<T, A>::sort(Comp)): When elements are equal take the one
2400         earlier in the list, so that sort is stable.
2401         * testsuite/23_containers/forward_list/operations/90105.cc: New test.
2402         * testsuite/23_containers/forward_list/comparable.cc: Test with
2403         types that meet the minimum EqualityComparable and LessThanComparable
2404         requirements. Remove irrelevant comment.
2405
2406         * include/std/variant (__detail::__variant::_Traits::_S_copy_assign):
2407         Do not depend on whether all alternative types are move constructible.
2408         (__detail::__variant::_Copy_assign_base::operator=): Remove cv-quals
2409         from the operand when deciding whether to perform the assignment.
2410         * testsuite/20_util/variant/compile.cc (DeletedMoves): Define type
2411         with deleted move constructor and deleted move assignment operator.
2412         (default_ctor, copy_ctor, move_ctor, copy_assign, move_assign): Check
2413         behaviour of variants with DeletedMoves as an alternative.
2414         * testsuite/20_util/variant/run.cc (DeletedMoves): Define same type.
2415         (move_ctor, move_assign): Check that moving a variant with a
2416         DeletedMoves alternative falls back to copying instead of moving.
2417
2418         * testsuite/20_util/variant/compile.cc: Remove empty string literals
2419         from static_assert declarations.
2420
2421         * testsuite/20_util/variant/compile.cc (MoveCtorOnly): Fix type to
2422         actually match its name.
2423         (MoveCtorAndSwapOnly): Define new type that adds swap to MoveCtorOnly.
2424         (test_swap()): Fix result for MoveCtorOnly and check
2425         MoveCtorAndSwapOnly.
2426
2427         * include/std/optional (optional::value_or(U&&) &&): Add missing
2428         constexpr specifier.
2429         * testsuite/20_util/optional/constexpr/observers/4.cc: Check value_or
2430         for disengaged optionals and rvalue optionals.
2431         * testsuite/20_util/optional/observers/4.cc: Likewise.
2432
2433 2019-04-12  Thomas Rodgers  <trodgers@redhat.com>
2434
2435         * include/pstl/algorithm_impl.h: Uglify identfiers.
2436         * include/pstl/numeric_impl.h:  Uglify identfiers.
2437         * include/pstl/parallel_backend_tbb.h: Uglify identfiers.
2438
2439 2019-04-11  Thomas Rodgers  <trodgers@redhat.com>
2440
2441         * include/bits/c++config:
2442         Add definition for __PSTL_ASSERT.
2443         Add definition for __PSTL_ASSERT_MSG.
2444         * include/pstl/algorithm_impl.h: Replace use of assert().
2445         * include/pstl/numeric_impl.h: Replace use of assert().
2446         * include/pstl/parallel_backend_tbb.h:
2447         Replace use of assert().
2448         Replace use of __TBB_ASSERT().
2449         * include/pstl/parallel_backend_utils.h: Replace use of assert().
2450
2451 2019-04-11  Jonathan Wakely  <jwakely@redhat.com>
2452
2453         PR libstdc++/90046
2454         * src/c++17/memory_resource.cc
2455         (monotonic_buffer_resource::_Chunk::allocate): Increase alignment if
2456         needed to allow placing a _Chunk at the end of the buffer.
2457         (monotonic_buffer_resource::_M_new_buffer): Remove static_assert.
2458
2459 2019-04-10  Jonathan Wakely  <jwakely@redhat.com>
2460
2461         * doc/xml/faq.xml: Add information about emergency EH pool.
2462         * doc/xml/manual/debug.xml: Update list of memory debugging tools.
2463         Move outdated information on mt_allocator to a separate section.
2464         * doc/xml/manual/evolution.xml: Clarify that GLIBCXX_FORCE_NEW
2465         doesn't affect the default allocator.
2466
2467         * testsuite/lib/libstdc++.exp (check_v3_target_parallel_mode): Fix
2468         typo.
2469
2470         PR libstdc++/89851
2471         * testsuite/20_util/variant/89851.cc: New test.
2472
2473 2019-04-09  Jonathan Wakely  <jwakely@redhat.com>
2474
2475         * include/std/variant: Adjust whitespace. Add comments.
2476         (_Multi_array): Leave primary template undefined.
2477         (_Multi_array<_Tp>): Define partial specialization for base case of
2478         recursion.
2479         (__gen_vtable_impl, __gen_vtable): Remove redundant && from type
2480         which is always a reference.
2481         (__gen_vtable::_S_apply()): Remove function, inline body into
2482         default member initializer.
2483         * testsuite/20_util/variant/visit.cc: Test with noncopyable types.
2484
2485         * include/std/variant (__variant_idx_cookie): Add member type.
2486         (__visitor_result_type): Remove.
2487         (__do_visit): Use invoke_result instead of __visitor_result_type.
2488         * testsuite/20_util/variant/visit.cc: New test.
2489
2490         PR libstdc++/90008
2491         * include/std/variant (_VARIANT_RELATION_FUNCTION_TEMPLATE): Remove
2492         unused capture.
2493         * testsuite/20_util/variant/90008.cc: New test.
2494
2495 2019-04-09  Thomas Rodgers  <trodgers@redhat.com>
2496
2497         * include/pstl/algorithm_impl.h: Add namespace qualification.
2498         * include/pstl/execution_defs.h: Add namespace qualification.
2499         * include/pstl/execution_impl.h: Add namespace qualification.
2500         * include/pstl/numeric_impl.h: Add namespace qualification.
2501         * include/pstl/parallel_backend_tbb.h: Add namespace qualification.
2502         * include/pstl/unseq_backend_simd.h: Add namespace qualification.
2503         * include/pstl/parallel_backend_utils.h: Include <cassert>.
2504
2505 2019-04-08  Ville Voutilainen  <ville.voutilainen@gmail.com>
2506
2507         Fix visit<R> for variant.
2508         * include/std/variant (__do_visit): Add a template parameter
2509         for enforcing same return types for visit.
2510         (__gen_vtable_impl): Likewise.
2511         (_S_apply_single_alt): Adjust.
2512         (__visit_invoke_impl): New. Handle casting to void.
2513         (__do_visit_invoke): New. Enforces same return types.
2514         (__do_visit_invoke_r): New. Converts return types.
2515         (__visit_invoke): Adjust.
2516         (__gen_vtable):  Add a template parameter for enforcing
2517         same return types for visit.
2518         * testsuite/20_util/variant/visit_r.cc: Add a test for a visitor with
2519         different return types.
2520         * testsuite/20_util/variant/visit_neg.cc: New. Ensures that
2521         visitors with different return types don't accidentally
2522         compile with regular visitation.
2523
2524 2019-04-08  Christophe Lyon  <christophe.lyon@linaro.org>
2525
2526         * testsuite/27_io/filesystem/iterators/caching.cc: Add
2527         dg-require-filesystem-ts.
2528
2529 2019-04-05  Jonathan Wakely  <jwakely@redhat.com>
2530
2531         * doc/xml/manual/status_cxx2020.xml: Update status.
2532         * include/std/variant (visit<R>): Define for C++2a (P0655R1).
2533         * testsuite/20_util/variant/visit_r.cc: New test.
2534
2535         * include/bits/fs_dir.h (directory_iterator::operator*)
2536         (directory_iterator::operator->): Add noexcept.
2537         (operator==, operator!=): Replace namespace-scope equality operators
2538         for directory iterators with hidden friends.
2539
2540         PR libstdc++/89986
2541         * config/abi/pre/gnu.ver: Add missing exports.
2542         * testsuite/27_io/filesystem/iterators/directory_iterator.cc: Test
2543         increment member.
2544
2545         * config/abi/pre/gnu.ver: Export new symbols.
2546         * include/bits/fs_dir.h (recursive_directory_iterator::options())
2547         (recursive_directory_iterator::recursion_pending())
2548         (recursive_directory_iterator::disable_recursion_pending()): Remove
2549         inline definitions. Make noexcept.
2550         (recursive_directory_iterator::depth())
2551         (recursive_directory_iterator::operator*())
2552         (recursive_directory_iterator::operator->()): Make noexcept.
2553         (recursive_directory_iterator::_M_options)
2554         (recursive_directory_iterator::_M_pending): Remove data members.
2555         * src/c++17/fs_path.cc (_Dir_stack): Add constructor and data members.
2556         (recursive_directory_iterator::recursive_directory_iterator): Remove
2557         ctor-initializer. Use new constructor for _Dir_stack.
2558         (recursive_directory_iterator::options())
2559         (recursive_directory_iterator::recursion_pending())
2560         (recursive_directory_iterator::disable_recursion_pending()): Add
2561         non-inline definitions.
2562         (recursive_directory_iterator::depth()): Make noexcept.
2563         (recursive_directory_iterator::increment(error_code&))
2564         (recursive_directory_iterator::pop(error_code&)): Adjust to new
2565         location of options and recursion_pending members.
2566         * testsuite/27_io/filesystem/iterators/recursion_pending.cc: New test.
2567         * testsuite/util/testsuite_fs.h (__gnu_test::scoped_file): Add
2568         user-declared move constructor and assignment operator, to make the
2569         type move-only.
2570
2571         * src/c++17/fs_dir.cc (_Dir::advance(bool, error_code&)): Handle
2572         d_type == DT_UNKNOWN immediately.
2573         (_Dir::should_recurse(bool, error_code&)): Remove file_type::unknown
2574         handling here.
2575         * testsuite/27_io/filesystem/iterators/caching.cc: New test.
2576
2577         * include/bits/fs_path.h (path::operator=(path&&)): Check for self
2578         assignment.
2579         * src/c++17/fs_path.cc (path::operator=(const path&)): Likewise.
2580         * testsuite/27_io/filesystem/path/assign/copy.cc: Test self
2581         assignment.
2582
2583         PR libstdc++/87431 (again)
2584         * include/bits/basic_string.h (__variant::_Never_valueless_alt):
2585         Define partial specialization for basic_string.
2586         * include/bits/shared_ptr.h (_Never_valueless_alt): Likewise for
2587         shared_ptr and weak_ptr.
2588         * include/bits/std_function.h (_Never_valueless_alt): Likewise for
2589         function.
2590         * include/bits/stl_vector.h (_Never_valueless_alt): Likewise for
2591         vector.
2592         * include/bits/unique_ptr.h (_Never_valueless_alt): Likewise for
2593         unique_ptr.
2594         * include/debug/vector (_Never_valueless_alt): Likewise for debug
2595         vector.
2596         * include/std/any (_Never_valueless_alt): Define explicit
2597         specialization for any.
2598         * include/std/variant (_Never_valueless_alt): Define primary template.
2599         (__never_valueless): Use _Never_valueless_alt instead of
2600         is_trivially_copyable.
2601         (variant::emplace<N>(Args&&...)): Add special case for non-throwing
2602         initializations to avoid try-catch overhead. Add special case for
2603         scalars produced by potentially-throwing conversions. Use
2604         _Never_valueless_alt instead of is_trivially_copyable for the
2605         remaining strong exception-safety cases.
2606         (variant::emplace<N>(initializer_list<U>, Args&&...)): Likewise.
2607         * testsuite/20_util/variant/87431.cc: Run both test functions.
2608         * testsuite/20_util/variant/exception_safety.cc: New test.
2609         * testsuite/20_util/variant/run.cc: Use pmr::string instead of string,
2610         so the variant becomes valueless.
2611
2612 2019-04-03  Jonathan Wakely  <jwakely@redhat.com>
2613
2614         PR libstdc++/85184
2615         * include/std/variant (_Copy_assign_base, _Move_assign_base, variant):
2616         Remove assertions.
2617         (variant::emplace<_Tp>): Return result of emplace<N> directly.
2618
2619         * include/std/string (__hash_string_base): New class template defining
2620         operator() for hashing strings.
2621         (hash<pmr::string>, hash<pmr::u8string>, hash<pmr::u16string>)
2622         (hash<pmr::u32string>, hash<pmr::wstring>): Define for C++17.
2623         * testsuite/21_strings/basic_string/hash/hash.cc: New test.
2624         * testsuite/21_strings/basic_string/hash/hash_char8_t.cc: New test.
2625
2626 2019-04-01  Ville Voutilainen  <ville.voutilainen@gmail.com>
2627
2628         Use single-visitation in variant assignment and swap and relops.
2629         Also use indices instead of types when checking whether
2630         variants hold the same thing.
2631         * include/std/variant (__do_visit): Add a template parameter
2632         for index visitation, invoke with indices if index visitation
2633         is used.
2634         (__variant_idx_cookie): New.
2635         (__visit_with_index): Likewise.
2636         (_Copy_assign_base::operator=): Do single-visitation with
2637         an index visitor.
2638         (_Move_assign_base::operator=): Likewise.
2639         (_Extra_visit_slot_needed): Adjust.
2640         (__visit_invoke): Call with indices if it's an index visitor.
2641         (relops): Do single-visitation with an index visitor.
2642         (swap): Likewise.
2643         (__visitor_result_type): New.
2644
2645 2019-03-30  Eric Botcazou  <ebotcazou@adacore.com>
2646
2647         * src/c++17/fs_ops.cc (fs::permissions): Use std::errc::not_supported.
2648
2649 2019-03-28  Ville Voutilainen  <ville.voutilainen@gmail.com>
2650
2651         Don't revisit a variant we are already visiting.
2652         * include/std/variant (__variant_construct_single): New.
2653         (__variant_construct): Use it.
2654         (_M_destructive_move): Likewise.
2655         (_M_destructive_copy): Likewise.
2656         (_Copy_assign_base::operator=): Adjust.
2657         (_Move_assign_base::operator=): Likewise.
2658         (swap): Likewise.
2659
2660 2019-03-26  Jonathan Wakely  <jwakely@redhat.com>
2661
2662         PR libstdc++/85965
2663         * include/bits/hashtable.h (_Hashtable): Move static assertions to
2664         destructor so they are not evaluated until the _Key type is complete.
2665         * include/bits/stl_tree.h (_Rb_tree): Likewise.
2666         * testsuite/23_containers/set/85965.cc: New test.
2667         * testsuite/23_containers/unordered_set/85965.cc: New test.
2668         * testsuite/23_containers/map/48101_neg.cc: Replace "here" errors
2669         with regexp matching the corresponding _Rb_tree specialization.
2670         * testsuite/23_containers/multimap/48101_neg.cc: Likewise.
2671         * testsuite/23_containers/multiset/48101_neg.cc: Remove "here" error.
2672         * testsuite/23_containers/set/48101_neg.cc: Likewise.
2673         * testsuite/23_containers/unordered_map/48101_neg.cc: Likewise.
2674         * testsuite/23_containers/unordered_multimap/48101_neg.cc: Likewise.
2675         * testsuite/23_containers/unordered_multiset/48101_neg.cc: Likewise.
2676         * testsuite/23_containers/unordered_set/48101_neg.cc: Likewise.
2677
2678 2019-03-26  Ville Voutilainen  <ville.voutilainen@gmail.com>
2679
2680         PR libstdc++/89825
2681         Fix based on a suggestion by Antony Polukhin.
2682         * include/std/variant (__never_valueless): New.
2683         (_M_valid): Use it.
2684         (_Extra_visit_slot_needed): New.
2685         (_Multi_array): Use it.
2686         (_S_apply_all_alts): Likewise.
2687
2688 2019-03-26  Ville Voutilainen  <ville.voutilainen@gmail.com>
2689
2690         PR libstdc++/89824
2691         Fix based on a suggestion by Antony Polukhin.
2692         * include/std/variant (__gen_vtable): Don't reserve an
2693         additional table slot, _Multi_array already does that.
2694
2695 2019-03-26  Ville Voutilainen  <ville.voutilainen@gmail.com>
2696
2697         PR libstdc++/89816
2698         Fix based on a suggestion by Antony Polukhin.
2699         * include/std/variant (__variant_construct): Capture a pointer
2700         to the storage and visit just one variant.
2701
2702 2019-03-22  Jonathan Wakely  <jwakely@redhat.com>
2703
2704         * doc/xml/manual/backwards_compatibility.xml: Remove link to
2705         Doxygen-generated pages with unstable URL.
2706         * doc/xml/manual/concurrency_extensions.xml: Likewise.
2707         * doc/xml/manual/extensions.xml: Likewise.
2708         * doc/xml/manual/parallel_mode.xml: Likewise.
2709         * doc/xml/manual/support.xml: Likewise.
2710
2711         * include/bits/stl_algobase.h (__lg): Do arithmetic on type int to
2712         avoid -Wconversion warnings.
2713
2714 2019-03-21  Thomas Rodgers  <trodgers@redhat.com>
2715
2716         * include/Makefile.am (std_header): Add ${std_srcdir}/execution.
2717         (pstl_srcdir, pstl_builddir, pstl_headers): New variables.
2718         (allstamped): Add stamp-pstl.
2719         (install-headers): Add ptsl_builddir.
2720         * include/Makefile.in: Regenerate.
2721         * include/bits/c++config: Add pstl configuration.
2722         * include/pstl/LICENSE.txt: New file.
2723         * include/pstl/algorithm_fwd.h: New file.
2724         * include/pstl/algorithm_impl.h: New file.
2725         * include/pstl/execution_defs.h: New file.
2726         * include/pstl/execution_impl.h: New file.
2727         * include/pstl/glue_algorithm_defs.h: New file.
2728         * include/pstl/glue_algorithm_impl.h: New file.
2729         * include/pstl/glue_execution_defs.h: New file.
2730         * include/pstl/glue_memory_defs.h: New file.
2731         * include/pstl/glue_memory_impl.h: New file.
2732         * include/pstl/glue_numeric_defs.h: New file.
2733         * include/pstl/glue_numeric_impl.h: New file.
2734         * include/pstl/memory_impl.h: New file.
2735         * include/pstl/numeric_fwd.h: New file.
2736         * include/pstl/numeric_impl.h: New file.
2737         * include/pstl/parallel_backend.h: New file.
2738         * include/pstl/parallel_backend_tbb.h: New file.
2739         * include/pstl/parallel_backend_utils.h: New file.
2740         * include/pstl/parallel_impl.h: New file.
2741         * include/pstl/pstl_config.h: New file.
2742         * include/pstl/unseq_backend_simd.h: New file.
2743         * include/pstl/utils.h: New file.
2744         * include/std/algorithm: Include parallel algorithm implementations.
2745         * include/std/execution: New file.
2746         * include/std/memory: Include parallel algorithm implementations.
2747         * include/std/numeric: Include parallel algorithm implementations.
2748         * include/std/version: Add parallel algorithms feature test macro.
2749         * testsuite/util/pstl/pstl_test_config.h: New file.
2750         * testsuite/util/pstl/test_utils.h: New file.
2751         * testsuite/20_util/specialized_algorithms/pstl/uninitialized_construct.cc: New file.
2752         * testsuite/20_util/specialized_algorithms/pstl/uninitialized_copy_move.cc: New file.
2753         * testsuite/20_util/specialized_algorithms/pstl/uninitialized_fill_destroy.cc: New file.
2754         * testsuite/25_algorithms/pstl/alg_merge/inplace_merge.cc: New file.
2755         * testsuite/25_algorithms/pstl/alg_merge/merge.cc: New file.
2756         * testsuite/25_algorithms/pstl/alg_modifying_operations/copy_if.cc: New file.
2757         * testsuite/25_algorithms/pstl/alg_modifying_operations/copy_move.cc: New file.
2758         * testsuite/25_algorithms/pstl/alg_modifying_operations/fill.cc: New file.
2759         * testsuite/25_algorithms/pstl/alg_modifying_operations/generate.cc: New file.
2760         * testsuite/25_algorithms/pstl/alg_modifying_operations/is_partitioned.cc: New file.
2761         * testsuite/25_algorithms/pstl/alg_modifying_operations/partition.cc: New file.
2762         * testsuite/25_algorithms/pstl/alg_modifying_operations/partition_copy.cc: New file.
2763         * testsuite/25_algorithms/pstl/alg_modifying_operations/remove.cc: New file.
2764         * testsuite/25_algorithms/pstl/alg_modifying_operations/remove_copy.cc: New file.
2765         * testsuite/25_algorithms/pstl/alg_modifying_operations/replace.cc: New file.
2766         * testsuite/25_algorithms/pstl/alg_modifying_operations/replace_copy.cc: New file.
2767         * testsuite/25_algorithms/pstl/alg_modifying_operations/rotate.cc: New file.
2768         * testsuite/25_algorithms/pstl/alg_modifying_operations/rotate_copy.cc: New file.
2769         * testsuite/25_algorithms/pstl/alg_modifying_operations/swap_ranges.cc: New file.
2770         * testsuite/25_algorithms/pstl/alg_modifying_operations/transform_binary.cc: New file.
2771         * testsuite/25_algorithms/pstl/alg_modifying_operations/transform_unary.cc: New file.
2772         * testsuite/25_algorithms/pstl/alg_modifying_operations/unique.cc: New file.
2773         * testsuite/25_algorithms/pstl/alg_modifying_operations/unique_copy_equal.cc: New file.
2774         * testsuite/25_algorithms/pstl/alg_nonmodifying/adjacent_find.cc: New file.
2775         * testsuite/25_algorithms/pstl/alg_nonmodifying/all_of.cc: New file.
2776         * testsuite/25_algorithms/pstl/alg_nonmodifying/any_of.cc: New file.
2777         * testsuite/25_algorithms/pstl/alg_nonmodifying/count.cc: New file.
2778         * testsuite/25_algorithms/pstl/alg_nonmodifying/equal.cc: New file.
2779         * testsuite/25_algorithms/pstl/alg_nonmodifying/find.cc: New file.
2780         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_end.cc: New file.
2781         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_first_of.cc: New file.
2782         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_if.cc: New file.
2783         * testsuite/25_algorithms/pstl/alg_nonmodifying/for_each.cc: New file.
2784         * testsuite/25_algorithms/pstl/alg_nonmodifying/mismatch.cc: New file.
2785         * testsuite/25_algorithms/pstl/alg_nonmodifying/none_of.cc: New file.
2786         * testsuite/25_algorithms/pstl/alg_nonmodifying/nth_element.cc: New file.
2787         * testsuite/25_algorithms/pstl/alg_nonmodifying/reverse.cc: New file.
2788         * testsuite/25_algorithms/pstl/alg_nonmodifying/reverse_copy.cc: New file.
2789         * testsuite/25_algorithms/pstl/alg_nonmodifying/search_n.cc: New file.
2790         * testsuite/25_algorithms/pstl/alg_sorting/includes.cc: New file.
2791         * testsuite/25_algorithms/pstl/alg_sorting/is_heap.cc: New file.
2792         * testsuite/25_algorithms/pstl/alg_sorting/is_sorted.cc: New file.
2793         * testsuite/25_algorithms/pstl/alg_sorting/lexicographical_compare.cc: New file.
2794         * testsuite/25_algorithms/pstl/alg_sorting/minmax_element.cc: New file.
2795         * testsuite/25_algorithms/pstl/alg_sorting/partial_sort.cc: New file.
2796         * testsuite/25_algorithms/pstl/alg_sorting/partial_sort_copy.cc: New file.
2797         * testsuite/25_algorithms/pstl/alg_sorting/set.cc: New file.
2798         * testsuite/25_algorithms/pstl/alg_sorting/sort.cc: New file.
2799         * testsuite/26_numerics/pstl/numeric_ops/adjacent_difference.cc: New file.
2800         * testsuite/26_numerics/pstl/numeric_ops/reduce.cc: New file.
2801         * testsuite/26_numerics/pstl/numeric_ops/scan.cc: New file.
2802         * testsuite/26_numerics/pstl/numeric_ops/transform_reduce.cc: New file.
2803         * testsuite/26_numerics/pstl/numeric_ops/transform_scan.cc: New file.
2804         * testsuite/testsuite/20_util/specialized_algorithms/pstl/uninitialized_construct.cc: New file.
2805         * testsuite/testsuite/20_util/specialized_algorithms/pstl/uninitialized_copy_move.cc: New file.
2806         * testsuite/testsuite/20_util/specialized_algorithms/pstl/uninitialized_fill_destroy.cc: New file.
2807         * testsuite/testsuite/25_algorithms/pstl/alg_merge/inplace_merge.cc: New file.
2808         * testsuite/testsuite/25_algorithms/pstl/alg_merge/merge.cc: New file.
2809         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/copy_if.cc: New file.
2810         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/copy_move.cc: New file.
2811         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/fill.cc: New file.
2812         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/generate.cc: New file.
2813         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/is_partitioned.cc: New file.
2814         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/partition.cc: New file.
2815         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/partition_copy.cc: New file.
2816         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/remove.cc: New file.
2817         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/remove_copy.cc: New file.
2818         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/replace.cc: New file.
2819         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/replace_copy.cc: New file.
2820         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/rotate.cc: New file.
2821         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/rotate_copy.cc: New file.
2822         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/swap_ranges.cc: New file.
2823         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/transform_binary.cc: New file.
2824         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/transform_unary.cc: New file.
2825         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/unique.cc: New file.
2826         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/unique_copy_equal.cc: New file.
2827         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/adjacent_find.cc: New file.
2828         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/all_of.cc: New file.
2829         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/any_of.cc: New file.
2830         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/count.cc: New file.
2831         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/equal.cc: New file.
2832         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/find.cc: New file.
2833         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/find_end.cc: New file.
2834         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/find_first_of.cc: New file.
2835         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/find_if.cc: New file.
2836         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/for_each.cc: New file.
2837         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/mismatch.cc: New file.
2838         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/none_of.cc: New file.
2839         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/nth_element.cc: New file.
2840         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/reverse.cc: New file.
2841         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/reverse_copy.cc: New file.
2842         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/search_n.cc: New file.
2843         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/includes.cc: New file.
2844         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/is_heap.cc: New file.
2845         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/is_sorted.cc: New file.
2846         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/lexicographical_compare.cc: New file.
2847         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/minmax_element.cc: New file.
2848         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/partial_sort.cc: New file.
2849         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/partial_sort_copy.cc: New file.
2850         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/set.cc: New file.
2851         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/sort.cc: New file.
2852         * testsuite/testsuite/26_numerics/pstl/numeric_ops/adjacent_difference.cc: New file.
2853         * testsuite/testsuite/26_numerics/pstl/numeric_ops/reduce.cc: New file.
2854         * testsuite/testsuite/26_numerics/pstl/numeric_ops/scan.cc: New file.
2855         * testsuite/testsuite/26_numerics/pstl/numeric_ops/transform_reduce.cc: New file.
2856         * testsuite/testsuite/26_numerics/pstl/numeric_ops/transform_scan.cc: New file.
2857
2858 2019-03-21  Jonathan Wakely  <jwakely@redhat.com>
2859
2860         * include/c_compatibility/math.h [!__STDCPP_WANT_MATH_SPEC_FUNCS__]
2861         (assoc_laguerre, assoc_laguerref, assoc_laguerrel, assoc_legendre)
2862         (assoc_legendref, assoc_legendrel, beta, betaf, betal, comp_ellint_1)
2863         (comp_ellint_1f, comp_ellint_1l, comp_ellint_2, comp_ellint_2f)
2864         (comp_ellint_2l, comp_ellint_3, comp_ellint_3f, comp_ellint_3l)
2865         (cyl_bessel_i, cyl_bessel_if, cyl_bessel_il, cyl_bessel_j)
2866         (cyl_bessel_jf, cyl_bessel_jl, cyl_bessel_k, cyl_bessel_kf)
2867         (cyl_bessel_kl, cyl_neumann, cyl_neumannf, cyl_neumannl, ellint_1)
2868         (ellint_1f, ellint_1l, ellint_2, ellint_2f, ellint_2l, ellint_3)
2869         (ellint_3f, ellint_3l, expint, expintf, expintl, hermite, hermitef)
2870         (hermitel, laguerre, laguerref, laguerrel, legendre, legendref)
2871         (legendrel, riemann_zeta, riemann_zetaf, riemann_zetal, sph_bessel)
2872         (sph_besself, sph_bessell, sph_legendre, sph_legendref, sph_legendrel)
2873         (sph_neumann, sph_neumannf, sph_neumannl): Only add using-declarations
2874         when the special functions IS is enabled, not for C++17.
2875         * testsuite/26_numerics/headers/cmath/functions_global_c++17.cc:
2876         Replace with ...
2877         * testsuite/26_numerics/headers/cmath/functions_global.cc: New test,
2878         without checks for special functions in C++17.
2879         * testsuite/26_numerics/headers/cmath/special_functions_global.cc:
2880         New test.
2881
2882         PR libstdc++/88066
2883         * include/backward/hash_map: Use <> for includes not "".
2884         * include/backward/hash_set: Likewise.
2885         * include/backward/strstream: Likewise.
2886         * include/tr1/bessel_function.tcc: Likewise.
2887         * include/tr1/exp_integral.tcc: Likewise.
2888         * include/tr1/legendre_function.tcc: Likewise.
2889         * include/tr1/modified_bessel_func.tcc: Likewise.
2890         * include/tr1/riemann_zeta.tcc: Likewise.
2891
2892 2019-03-19  Jonathan Wakely  <jwakely@redhat.com>
2893
2894         * doc/xml/manual/allocator.xml: Link to table documenting evolution
2895         of extension allocators.
2896         * doc/xml/manual/evolution.xml: Use angle brackets for header names.
2897         Document new headers in 7.2, 8.1 and 9.1 releases.
2898         * doc/xml/manual/using.xml: Adjust link target for new_allocator.
2899         * doc/html/*: Regenerate.
2900
2901 2019-03-12  John David Anglin  <dave.anglin@bell.net>
2902
2903         PR libstdc++/89461
2904         * testsuite/lib/libstdc++.exp: Locate libatomic.
2905         * testsuite/lib/dg-options.exp (add_options_for_libatomic): New.
2906         * testsuite/20_util/shared_ptr/thread/default_weaktoshared.cc: Add
2907         libatomic options.
2908         * testsuite/20_util/shared_ptr/thread/mutex_weaktoshared.cc: Likewise.
2909         * testsuite/experimental/net/timer/waitable/cons.cc: Likewise.
2910         * testsuite/experimental/net/timer/waitable/dest.cc: Likewise.
2911         * testsuite/experimental/net/timer/waitable/ops.cc: Likewise.
2912
2913 2019-03-11  Jonathan Wakely  <jwakely@redhat.com>
2914
2915         PR libstdc++/89460
2916         * configure.ac: Check for sockatmark.
2917         * crossconfig.m4: Check for sockatmark.
2918         * config.h.in: Regenerate.
2919         * configure: Regenerate.
2920         * include/experimental/internet (address_v4::_S_hton): Rename
2921         overloaded functions to _S_hton_16 and _S_ntoh_16.
2922         (address_v4::_S_ntoh): Rename to _S_ntoh_16 and _S_ntoh_32.
2923         (basic_endpoint): Adjust calls to _S_hton and _S_ntoh.
2924         * include/experimental/socket (basic_socket::at_mark): Check
2925         _GLIBCXX_HAVE_SOCKATMARK.
2926
2927         * testsuite/29_atomics/atomic_flag/test_and_set/explicit-hle.cc: Use
2928         const variables instead of macros.
2929
2930         PR libstdc++/89629
2931         * libsupc++/hash_bytes.cc [__SIZEOF_SIZE_T__ == 8] (_Hash_bytes):
2932         Use correct type for len_aligned.
2933         * testsuite/20_util/hash/89629.cc: New test.
2934
2935 2019-03-11  Jakub Jelinek  <jakub@redhat.com>
2936
2937         PR libstdc++/89641
2938         * include/std/atomic (atomic<T>::store, atomic<T>::load,
2939         atomic<T>::exchange, atomic<T>::compare_exchange_weak,
2940         atomic<T>::compare_exchange_strong): Cast __m or __s and __f to int.
2941         * include/bits/atomic_base.h (__atomic_base<T>::operator++,
2942         __atomic_base<T>::operator--, __atomic_base<T>::operator+=,
2943         __atomic_base<T>::operator-=, __atomic_base<T>::operator&=,
2944         __atomic_base<T>::operator|=, __atomic_base<T>::operator^=,
2945         __atomic_base<T*>::operator++, __atomic_base<T*>::operator--,
2946         __atomic_base<T*>::operator+=, __atomic_base<T*>::operator-=): Cast
2947         memory_order_seq_cst to int.
2948
2949 2019-03-08  Jonathan Wakely  <jwakely@redhat.com>
2950
2951         * doc/xml/manual/using.xml: Use link element instead of xref.
2952         * doc/html/*: Regenerate.
2953
2954         * include/bits/fs_path.h (path::format): Add fixed underlying type.
2955
2956 2019-03-08  François Dumont  <fdumont@gcc.gnu.org>
2957
2958         PR libstdc++/89477
2959         * include/debug/map.h (map): Use _RequireNotAllocator to constrain
2960         parameters in deduction guides.
2961         * include/debug/multimap.h (multimap): Likewise.
2962         * include/debug/set.h (multimap): Likewise.
2963         * include/debug/multiset.h (multimap): Likewise.
2964         * include/debug/unordered_map (unordered_map): Likewise.
2965         (unordered_multimap): Likewise.
2966         * include/debug/unordered_set (unordered_set): Likewise.
2967         (unordered_multiset): Likewise.
2968
2969         PR libstdc++/89608
2970         * include/debug/unordered_map (unordered_map<>::_M_check_rehashed):
2971         Invalidate all iterators in case of rehash.
2972         (unordered_multimap<>::_M_check_rehashed): Likewise.
2973         * include/debug/unordered_set
2974         (unordered_set<>::_M_check_rehashed): Likewise.
2975         (unordered_multiset<>::_M_check_rehashed): Likewise.
2976         * testsuite/23_containers/unordered_set/debug/89608_neg.cc: New.
2977
2978 2019-03-07  Andreas Schwab  <schwab@suse.de>
2979
2980         * config/abi/post/riscv64-linux-gnu: New directory.
2981         * config/abi/post/riscv64-linux-gnu/baseline_symbols.txt: New file.
2982
2983 2019-03-07  Jonathan Wakely  <jwakely@redhat.com>
2984
2985         * testsuite/20_util/function_objects/bind_front/1.cc: Change from
2986         compile test to run. Fix typo.
2987
2988         * doc/xml/manual/status_cxx2020.xml: Update C++20 status.
2989         * doc/html/*: Regenerate.
2990
2991         P0356R5 Simplified partial function application
2992         * include/std/functional [C++20] (_Bind_front, _Bind_front_t): Define
2993         helpers for bind_front.
2994         (bind_front, __cpp_lib_bind_front): Define.
2995         * testsuite/20_util/function_objects/bind_front/1.cc: New test.
2996
2997 2019-03-06  Jonathan Wakely  <jwakely@redhat.com>
2998
2999         * include/std/type_traits (__cpp_lib_bounded_array_traits): Define.
3000         * include/std/version (__cpp_lib_bounded_array_traits): Likewise.
3001         * testsuite/20_util/is_bounded_array/value.cc: Check for macro.
3002         * testsuite/20_util/is_unbounded_array/value.cc: Likewise.
3003
3004 2019-03-06  Edward Smith-Rowland  <3dw4rd@verizon.net>
3005
3006         PR libstdc++/86655 - std::assoc_legendre should not constrain
3007         the value of m (or x).
3008         * include/tr1/legendre_function.tcc (__assoc_legendre_p,
3009         __sph_legendre): If degree > order Don't throw, return 0.
3010         (__legendre_p, __assoc_legendre_p): Don't constrain x either.
3011         * testsuite/special_functions/02_assoc_legendre/pr86655.cc: New test.
3012         * testsuite/special_functions/20_sph_legendre/pr86655.cc: New test.
3013         * testsuite/tr1/5_numerical_facilities/special_functions/
3014         02_assoc_legendre/pr86655.cc: New test.
3015         * testsuite/tr1/5_numerical_facilities/special_functions/
3016         22_sph_legendre/pr86655.cc: New test.
3017
3018 2019-03-06  Ville Voutilainen  <ville.voutilainen@gmail.com>
3019
3020         Rewrite variant.
3021         Also PR libstdc++/85517
3022         * include/std/variant (__do_visit): New.
3023         (__variant_cast): Likewise.
3024         (__variant_cookie): Likewise.
3025         (__erased_*): Remove.
3026         (_Variant_storage::_S_vtable): Likewise.
3027         (_Variant_storage::__M_reset_impl): Adjust to use __do_visit.
3028         (_Variant_storage::__M_reset): Adjust.
3029         (__variant_construct): New.
3030         (_Copy_ctor_base(const _Copy_ctor_base&)): Adjust to use
3031         __variant_construct.
3032         (_Move_ctor_base(_Move_ctor_base&&)): Likewise.
3033         (_Move_ctor_base::__M_destructive_copy): New.
3034         (_Move_ctor_base::__M_destructive_move): Adjust to use
3035         __variant_construct.
3036         (_Copy_assign_base::operator=): Adjust to use __do_visit.
3037         (_Copy_assign_alias): Adjust to check both copy assignment
3038         and copy construction for triviality.
3039         (_Move_assign_base::operator=): Adjust to use __do_visit.
3040         (_Multi_array): Add support for visitors that accept and return
3041         a __variant_cookie.
3042         (__gen_vtable_impl::_S_apply_all_alts): Likewise.
3043         (__gen_vtable_impl::_S_apply_single_alt): Likewise.
3044         (__gen_vtable_impl::__element_by_index_or_cookie): New. Generate
3045         a __variant_cookie temporary for a variant that is valueless and..
3046         (__gen_vtable_impl::__visit_invoke): ..adjust here.
3047         (__gen_vtable::_Array_type): Conditionally make space for
3048         the __variant_cookie visitor case.
3049         (__variant_construct_by_index): New.
3050         (get_if): Adjust to use std::addressof.
3051         (relops): Adjust to use __do_visit.
3052         (variant): Add __variant_cast and __variant_construct_by_index
3053         as friends.
3054         (variant::emplace): Use _M_reset() and __variant_construct_by_index
3055         instead of self-destruction.
3056         (variant::swap): Adjust to use __do_visit.
3057         (visit): Reimplement in terms of __do_visit.
3058         (__variant_hash_call_base_impl::operator()): Adjust to use __do_visit.
3059         * testsuite/20_util/variant/compile.cc: Adjust.
3060         * testsuite/20_util/variant/run.cc: Likewise.
3061
3062 2019-03-06  Jonathan Wakely  <jwakely@redhat.com>
3063
3064         * include/bits/c++config.h (_cpp_lib_char8_t): Add L suffix to
3065         constant.
3066         * testsuite/experimental/feat-char8_t.cc: Likewise.
3067
3068          * include/std/type_traits [C++20] (is_bounded_array)
3069          (is_unbounded_array, is_bounded_array_v, is_unbounded_array_v):
3070          Define.
3071          * testsuite/20_util/is_bounded_array/requirements/
3072          explicit_instantiation.cc: New test.
3073          * testsuite/20_util/is_bounded_array/requirements/typedefs.cc: New
3074          test.
3075          * testsuite/20_util/is_bounded_array/value.cc: New test.
3076          * testsuite/20_util/is_unbounded_array/requirements/
3077          explicit_instantiation.cc: New test.
3078          * testsuite/20_util/is_unbounded_array/requirements/typedefs.cc: New
3079          * test.
3080          * testsuite/20_util/is_unbounded_array/value.cc: New test.
3081
3082         * include/bits/ptr_traits.h [C++20] (pointer_traits<T*>::pointer_to):
3083         Add constexpr.
3084         * testsuite/20_util/pointer_traits/pointer_to_constexpr.cc: New test.
3085
3086 2019-03-05  Jonathan Wakely  <jwakely@redhat.com>
3087
3088         * include/c_compatibility/math.h [C++20] (lerp): Add using
3089         declaration.
3090         * include/c_global/cmath [C++20] (__cpp_lib_interpolate): Define.
3091         (__lerp): Define function template to implement lerp.
3092         (lerp(float, float, float), lerp(double, double, double))
3093         (lerp(long double, long double, long double)): Define for C++20.
3094         * include/std/numeric [C++20] (__cpp_lib_interpolate): Define.
3095         (midpoint(T, T), midpoint(T*, T*)): Define.
3096         * include/std::version [C++20] (__cpp_lib_interpolate): Define.
3097         * testsuite/26_numerics/lerp.cc: New test.
3098         * testsuite/26_numerics/midpoint/floating.cc: New test.
3099         * testsuite/26_numerics/midpoint/integral.cc: New test.
3100         * testsuite/26_numerics/midpoint/pointer.cc: New test.
3101
3102 2019-03-04  Edward Smith-Rowland  <3dw4rd@verizon.net>
3103
3104         PR libstdc++/88996 Implement P0439R0
3105         Make std::memory_order a scoped enumeration.
3106         * include/bits/atomic_base.h: For C++20 make memory_order a scoped enum,
3107         add variables for the old enumerators.  Adjust calls.
3108         * testsuite/29_atomics/headers/atomic/types_std_c++2a.cc: New test.
3109         * testsuite/29_atomics/headers/atomic/types_std_c++2a_neg.cc: New test.
3110
3111 2019-03-04  Jonathan Wakely  <jwakely@redhat.com>
3112
3113         * testsuite/26_numerics/bit/bitops.rot/rotl.cc: Remove bogus dg-do
3114         directive.
3115
3116         * include/std/memory_resource (polymorphic_allocator): Add default
3117         template argument for C++20.
3118         (polymorphic_allocator::allocate_bytes)
3119         (polymorphic_allocator::deallocate_bytes)
3120         (polymorphic_allocator::allocate_object)
3121         (polymorphic_allocator::deallocate_object)
3122         (polymorphic_allocator::new_object)
3123         (polymorphic_allocator::delete_object): New member functions for
3124         C++20.
3125         * testsuite/20_util/polymorphic_allocator/allocate_object.cc: New
3126         test.
3127
3128 2019-03-03  Jonathan Wakely  <jwakely@redhat.com>
3129
3130         PR libstdc++/89562
3131         * src/filesystem/ops-common.h (do_copy_file): Open files in binary
3132         mode for mingw.
3133
3134 2019-03-01  Jonathan Wakely  <jwakely@redhat.com>
3135
3136         * testsuite/util/testsuite_allocator.h (__gnu_test::memory_resource)
3137         [!__cpp_sized_deallocation]: Do not pass size to operator delete.
3138
3139         * include/std/memory (uses_allocator_construction_args): New set of
3140         overloaded functions.
3141         (make_obj_using_allocator, uninitialized_construct_using_allocator):
3142         New functions.
3143         * include/std/memory_resource (polymorphic_allocator::construct)
3144         [__cplusplus > 201703l]: Replace all overloads with a single function
3145         using uses_allocator_construction_args.
3146         * testsuite/20_util/polymorphic_allocator/construct_c++2a.cc: New
3147         test.
3148         * testsuite/20_util/uses_allocator/make_obj.cc: New test.
3149
3150 2019-02-27  Jonathan Wakely  <jwakely@redhat.com>
3151
3152         PR libstdc++/89466
3153         * acinclude.m4 (GLIBCXX_CONFIGURE_DOCBOOK): Reorder check for local
3154         stylesheet directories before check for xsltproc. Try to use
3155         xmlcatalog to find local stylesheet directory before trying hardcoded
3156         paths. Add path used by suse to hardcoded paths. Adjust xsltproc
3157         check to look for the same stylesheet as doc/Makefile.am uses. Don't
3158         use xsltproc if xmlcatalog fails to find a local stylesheet.
3159         * configure.ac: Check for xmlcatalog.
3160         * Makefile.in: Regenerate.
3161         * configure: Likewise.
3162         * doc/Makefile.in: Likewise.
3163         * include/Makefile.in: Likewise.
3164         * libsupc++/Makefile.in: Likewise.
3165         * po/Makefile.in: Likewise.
3166         * python/Makefile.in: Likewise.
3167         * src/Makefile.in: Likewise.
3168         * src/c++11/Makefile.in: Likewise.
3169         * src/c++17/Makefile.in: Likewise.
3170         * src/c++98/Makefile.in: Likewise.
3171         * src/filesystem/Makefile.in: Likewise.
3172         * testsuite/Makefile.in: Likewise.
3173
3174 2019-02-26  Jonathan Wakely  <jwakely@redhat.com>
3175
3176         PR libstdc++/89477
3177         * include/bits/alloc_traits.h (_RequireNotAllocator): New helper for
3178         container deduction guides.
3179         * include/bits/hashtable.h (_RequireNotAllocatorOrIntegral): Likewise.
3180         * include/bits/stl_map.h (map): Use _RequireNotAllocator to constrain
3181         parameters in deduction guides.
3182         * include/bits/stl_multimap.h (multimap): Likewise.
3183         * include/bits/stl_multiset.h (multiset): Likewise.
3184         * include/bits/stl_queue.h (queue, priority_queue): Likewise.
3185         * include/bits/stl_set.h (set): Likewise.
3186         * include/bits/stl_stack.h (stack): Likewise.
3187         * include/bits/unordered_map.h (unordered_map, unordered_multimap):
3188         use _RequireNotAllocator and _RequireNotAllocatorOrIntegral to
3189         constrain parameters in deduction guides.
3190         * include/bits/unordered_set.h (unordered_set, unordered_multiset):
3191         Likewise.
3192         * testsuite/23_containers/map/cons/deduction.cc: Test additional
3193         deduction cases.
3194         * testsuite/23_containers/multiset/cons/deduction.cc: Likewise.
3195         * testsuite/23_containers/set/cons/deduction.cc: Likewise.
3196         * testsuite/23_containers/unordered_map/cons/deduction.cc: Likewise.
3197         * testsuite/23_containers/unordered_multimap/cons/deduction.cc:
3198         Likewise.
3199         * testsuite/23_containers/unordered_multiset/cons/deduction.cc:
3200         Likewise.
3201         * testsuite/23_containers/unordered_set/cons/deduction.cc: Likewise.
3202
3203         PR libstdc++/89416
3204         * include/bits/alloc_traits.h (__is_alloc_insertable_impl): Change
3205         to class template and partial specialization using void_t.
3206         (__is_copy_insertable, __is_move_insertable): Adjust base class.
3207
3208 2019-02-24  Jonathan Wakely  <jwakely@redhat.com>
3209
3210         PR libstdc++/89416
3211         * include/bits/alloc_traits.h (__is_alloc_insertable_impl): Make
3212         copy and move members public.
3213
3214 2019-02-23  Jonathan Wakely  <jwakely@redhat.com>
3215
3216         * include/std/type_traits (__underlying_type_impl): New helper to
3217         make underlying_type SFINAE-friendly.
3218         (underlying_type): Derive from __underlying_type_impl.
3219         * testsuite/20_util/underlying_type/requirements/typedefs-3.cc: New
3220         test.
3221
3222         PR libstdc++/89446
3223         * include/bits/char_traits.h (__constant_char_array): Check index is
3224         in range before dereferencing.
3225         (char_traits<char>::compare, char_traits<char>::find)
3226         (char_traits<char8_t>::compare, char_traits<char8_t>::find): Return
3227         immediately if n is zero.
3228         (char_traits<wchar_t>::compare, char_traits<wchar_t>::find): Likewise.
3229         Remove workarounds for PR 67026.
3230         * testsuite/21_strings/basic_string_view/operators/char/89446.cc:
3231         New test.
3232         * testsuite/21_strings/basic_string_view/operators/wchar_t/89446.cc:
3233         New test.
3234
3235 2019-02-22  Eric Botcazou  <ebotcazou@adacore.com>
3236
3237         * config/abi/post/sparc64-linux-gnu/baseline_symbols.txt: Adjust.
3238         * config/abi/post/sparc64-linux-gnu/32/baseline_symbols.txt: Likewise.
3239
3240 2019-02-22  Jakub Jelinek  <jakub@redhat.com>
3241
3242         PR libstdc++/89402
3243         * src/c++98/compatibility-ldbl.cc (_ZNKSt4hashIeEclEe): Change return
3244         type to std::size_t and argument to type to long double.
3245
3246 2019-02-22  Eric Botcazou  <ebotcazou@adacore.com>
3247
3248         * configure.host (abi_baseline_pair): Adjust for SPARC64/Linux.
3249         * config/abi/post/sparc64-linux-gnu: New directory.
3250         * config/abi/post/sparc64-linux-gnu/baseline_symbols.txt: New file.
3251         * config/abi/post/sparc64-linux-gnu/32: New directory.
3252         * config/abi/post/sparc64-linux-gnu/32/baseline_symbols.txt: New file.
3253
3254 2019-02-21  Jonathan Wakely  <jwakely@redhat.com>
3255
3256         * testsuite/29_atomics/headers/atomic/types_std_c++20.cc: New test.
3257         * testsuite/29_atomics/headers/atomic/types_std_c++20_neg.cc: New
3258         test.
3259
3260 2019-02-22  Tom Honermann  <tom@honermann.net>
3261
3262         * python/libstdcxx/v6/printers.py (register_type_printers): Add type
3263         printers for u8string and u8string_view.
3264
3265 2019-02-22  Tom Honermann  <tom@honermann.net>
3266
3267         * testsuite/18_support/byte/ops.cc: Validate
3268         std::to_integer<char8_t>, std::to_integer<char16_t>, and
3269         std::to_integer<char32_t>.
3270         * testsuite/18_support/numeric_limits/dr559.cc: Validate
3271         std::numeric_limits<char8_t>.
3272         * testsuite/18_support/numeric_limits/lowest.cc: Validate
3273         std::numeric_limits<char8_t>::lowest().
3274         * testsuite/18_support/numeric_limits/max_digits10.cc: Validate
3275         std::numeric_limits<char8_t>::max_digits10.
3276         * testsuite/18_support/type_info/fundamental.cc: Validate
3277         typeinfo for char8_t.
3278         * testsuite/20_util/from_chars/1_c++20_neg.cc: New test, validating
3279         std::from_chars with char8_t.
3280         * testsuite/20_util/hash/requirements/explicit_instantiation.cc:
3281         Validate explicit instantiation of std::hash<char8_t>.
3282         * testsuite/20_util/is_integral/value.cc: Validate
3283         std::is_integral<char8_t>.
3284         * testsuite/20_util/make_signed/requirements/typedefs-4.cc:
3285         Validate std::make_signed<char8_t>.
3286         * testsuite/21_strings/basic_string/cons/char/deduction.cc:
3287         Validate u8string construction from char8_t sources.
3288         * testsuite/21_strings/basic_string/types/pmr_typedefs.cc: Validate
3289         std::pmr::u8string.
3290         * testsuite/21_strings/basic_string_view/operations/compare/
3291         char/70483.cc: Validate substr operations on u8string_view.
3292         * testsuite/21_strings/basic_string_view/typedefs.cc: Validate that
3293         the u8string_view typedef is defined.
3294         * testsuite/21_strings/char_traits/requirements/
3295         constexpr_functions.cc: Validate char_traits<char8_t> constexpr
3296         member functions.
3297         * testsuite/21_strings/char_traits/requirements/
3298         constexpr_functions_c++17.cc: Validate char_traits<char8_t> C++17
3299         constexpr member functions.
3300         * testsuite/21_strings/headers/string/types_std_c++0x.cc: Validate
3301         that the u8string typedef is defined.
3302         * testsuite/22_locale/locale/cons/unicode.cc: Validate the presence
3303         of the std::codecvt<char16_t, char8_t, std::mbstate_t> and
3304         std::codecvt<char32_t, char8_t, std::mbstate_t> facets.
3305         * testsuite/29_atomics/atomic/cons/assign_neg.cc: Update line
3306         numbers.
3307         * testsuite/29_atomics/atomic/cons/copy_neg.cc: Likewise.
3308         * testsuite/29_atomics/atomic_integral/cons/assign_neg.cc:
3309         Likewise.
3310         * testsuite/29_atomics/atomic_integral/cons/copy_neg.cc: Likewise.
3311         * testsuite/29_atomics/atomic_integral/is_always_lock_free.cc:
3312         Validate std::atomic<char8_t>::is_always_lock_free
3313         * testsuite/29_atomics/atomic_integral/operators/bitwise_neg.cc:
3314         Update line numbers.
3315         * testsuite/29_atomics/atomic_integral/operators/decrement_neg.cc:
3316         Likewise.
3317         * testsuite/29_atomics/atomic_integral/operators/increment_neg.cc:
3318         Likewise.
3319         * testsuite/experimental/polymorphic_allocator/pmr_typedefs_string.cc:
3320         Validate std::experimental::pmr::u8string.
3321         * testsuite/experimental/string_view/typedefs.cc: Validate that the
3322         u8string_view typedef is defined.
3323         * testsuite/util/testsuite_common_types.h: Add char8_t, char16_t and
3324         char32_t to the typelists.
3325
3326 2019-02-22  Tom Honermann  <tom@honermann.net>
3327
3328         * include/ext/typelist.h: Constrain a partial specialization of
3329         typelist::detail::append_ to only match chain<T1,T2>.
3330
3331 2019-02-21  Jonathan Wakely  <jwakely@redhat.com>
3332
3333         PR libstdc++/89416
3334         * include/bits/alloc_traits.h (__is_alloc_insertable_impl): Replace
3335         class template with class. Replace move and copy member types with
3336         member alias templates, so they are only instantiated when needed.
3337         (__is_copy_insertable, __is_move_insertable): Adjust base class.
3338         * testsuite/23_containers/vector/modifiers/push_back/89130.cc: Enable
3339         test for C++11/14/17 as well.
3340         * testsuite/23_containers/vector/modifiers/push_back/89416.cc: New
3341         test.
3342
3343 2019-02-20  Jakub Jelinek  <jakub@redhat.com>
3344
3345         PR libstdc++/89402
3346         * src/c++98/compatibility-ldbl.cc (_ZNKSt4hashIeEclEe): Add
3347         _GLIBCXX_PURE to the alias declaration.
3348
3349 2019-02-19  Jonathan Wakely  <jwakely@redhat.com>
3350
3351         * testsuite/21_strings/basic_string/literals/types.cc
3352         [_GLIBCXX_USE_CHAR8_T]: Adjust expected string type for u8 literal.
3353         * testsuite/21_strings/basic_string/literals/values.cc
3354         [_GLIBCXX_USE_CHAR8_T]: Likewise.
3355         * testsuite/22_locale/codecvt/char16_t.cc: Adjust for u8 literals
3356         potentially having different type.
3357         * testsuite/22_locale/codecvt/char32_t.cc: Likewise.
3358         * testsuite/22_locale/codecvt/codecvt_utf8/79980.cc: Cast u8 literal
3359         to char.
3360         * testsuite/22_locale/codecvt/codecvt_utf8/wchar_t/1.cc: Likewise.
3361         * testsuite/22_locale/codecvt/utf8.cc: Likewise.
3362         * testsuite/22_locale/conversions/string/2.cc: Remove u8 prefix from
3363         string literals only using basic character set.
3364         * testsuite/22_locale/conversions/string/3.cc: Likewise. Cast other
3365         u8 literals to char.
3366         * testsuite/29_atomics/headers/atomic/macros.cc [_GLIBCXX_USE_CHAR8_T]:
3367         Test ATOMIC_CHAR8_T_LOCK_FREE.
3368         Add missing #error to ATOMIC_CHAR16_T_LOCK_FREE test.
3369         * testsuite/29_atomics/headers/atomic/types_std_c++0x.cc
3370         [_GLIBCXX_USE_CHAR8_T]: Check for std::atomic_char8_t.
3371         * testsuite/experimental/string_view/literals/types.cc
3372         [_GLIBCXX_USE_CHAR8_T]: Adjust expected string_view type for u8
3373         literal.
3374         * testsuite/experimental/string_view/literals/values.cc
3375         [_GLIBCXX_USE_CHAR8_T]: Likewise.
3376
3377 2019-02-19  Tom Honermann  <tom@honermann.net>
3378
3379         * testsuite/18_support/numeric_limits/char8_t.cc: New test cloned
3380         from char16_32_t.cc; validates numeric_limits<char8_t>.
3381         * testsuite/21_strings/basic_string/literals/types-char8_t.cc: New
3382         test cloned from types.cc; validates operator""s for char8_t
3383         returns u8string.
3384         * testsuite/21_strings/basic_string/literals/values-char8_t.cc: New
3385         test cloned from values.cc; validates construction and comparison
3386         of u8string values.
3387         * testsuite/21_strings/basic_string/requirements/
3388         /explicit_instantiation/char8_t/1.cc: New test cloned from
3389         char16_t/1.cc; validates explicit instantiation of
3390         basic_string<char8_t>.
3391         * testsuite/21_strings/basic_string_view/literals/types-char8_t.cc:
3392         New test cloned from types.cc; validates operator""sv for char8_t
3393         returns u8string_view.
3394         * testsuite/21_strings/basic_string_view/literals/
3395         values-char8_t.cc: New test cloned from values.cc; validates
3396         construction and comparison of u8string_view values.
3397         * testsuite/21_strings/basic_string_view/requirements/
3398         explicit_instantiation/char8_t/1.cc: New test cloned from
3399         char16_t/1.cc; validates explicit instantiation of
3400         basic_string_view<char8_t>.
3401         * testsuite/21_strings/char_traits/requirements/char8_t/65049.cc:
3402         New test cloned from char16_t/65049.cc; validates that
3403         char_traits<char8_t> is not vulnerable to the concerns in PR65049.
3404         * testsuite/21_strings/char_traits/requirements/char8_t/
3405         typedefs.cc: New test cloned from char16_t/typedefs.cc; validates
3406         that char_traits<char8_t> member typedefs are present and correct.
3407         * testsuite/21_strings/char_traits/requirements/
3408         explicit_instantiation/char8_t/1.cc: New test cloned from
3409         char16_t/1.cc; validates explicit instantiation of
3410         char_traits<char8_t>.
3411         * testsuite/22_locale/codecvt/char16_t-char8_t.cc: New test cloned
3412         from char16_t.cc: validates
3413         codecvt<char16_t, char8_t, mbstate_t>.
3414         * testsuite/22_locale/codecvt/char32_t-char8_t.cc: New test cloned
3415         from char32_t.cc: validates
3416         codecvt<char32_t, char8_t, mbstate_t>.
3417         * testsuite/22_locale/codecvt/utf8-char8_t.cc: New test cloned from
3418         utf8.cc; validates codecvt<char16_t, char8_t, std::mbstate_t> and
3419         codecvt<char32_t, char8_t, std::mbstate_t>.
3420         * testsuite/27_io/filesystem/path/native/string-char8_t.cc: New
3421         test cloned from string.cc; validates filesystem::path construction
3422         from char8_t input.
3423         * testsuite/experimental/feat-char8_t.cc: New test; validates that
3424         the __cpp_lib_char8_t feature test macro is defined with the
3425         correct value.
3426         * testsuite/experimental/filesystem/path/native/string-char8_t.cc:
3427         New test cloned from string.cc; validates filesystem::path
3428         construction from char8_t input.
3429         * testsuite/experimental/string_view/literals/types-char8_t.cc: New
3430         test cloned from types.cc; validates operator""sv for char8_t
3431         returns u8string_view.
3432         * testsuite/experimental/string_view/literals/values-char8_t.cc:
3433         New test cloned from values.cc; validates construction and
3434         comparison of u8string_view values.
3435         * testsuite/experimental/string_view/requirements/
3436         explicit_instantiation/char8_t/1.cc: New test cloned from
3437         char16_t/1.cc; validates explicit instantiation of
3438         basic_string_view<char8_t>.
3439         * testsuite/ext/char8_t/atomic-1.cc: New test; validates that
3440         ATOMIC_CHAR8_T_LOCK_FREE is not defined if char8_t support is not
3441         enabled.
3442
3443 2019-02-19  Tom Honermann  <tom@honermann.net>
3444
3445         P0482R5 char8_t: Standard library support
3446         * config/abi/pre/gnu-versioned-namespace.ver (CXXABI_2.0): Add
3447         typeinfo symbols for char8_t.
3448         * config/abi/pre/gnu.ver: Add CXXABI_1.3.12.
3449         (GLIBCXX_3.4.26): Add symbols for specializations of
3450         numeric_limits and codecvt that involve char8_t.
3451         (CXXABI_1.3.12): Add typeinfo symbols for char8_t.
3452         * include/bits/atomic_base.h: Add atomic_char8_t.
3453         * include/bits/basic_string.h: Add std::hash<u8string> and
3454         operator""s(const char8_t*, size_t).
3455         * include/bits/c++config: Define _GLIBCXX_USE_CHAR8_T and
3456         __cpp_lib_char8_t.
3457         * include/bits/char_traits.h: Add char_traits<char8_t>.
3458         * include/bits/codecvt.h: Add
3459         codecvt<char16_t, char8_t, mbstate_t>,
3460         codecvt<char32_t, char8_t, mbstate_t>,
3461         codecvt_byname<char16_t, char8_t, mbstate_t>, and
3462         codecvt_byname<char32_t, char8_t, mbstate_t>.
3463         * include/bits/cpp_type_traits.h: Add __is_integer<char8_t> to
3464         recognize char8_t as an integral type.
3465         * include/bits/fs_path.h: (path::__is_encoded_char): Recognize
3466         char8_t.
3467         (path::u8string): Return std::u8string when char8_t support is
3468         enabled.
3469         (path::generic_u8string): Likewise.
3470         (path::_S_convert): Handle conversion from char8_t input.
3471         (path::_S_str_convert): Likewise.
3472         * include/bits/functional_hash.h: Add hash<char8_t>.
3473         * include/bits/locale_conv.h (__str_codecvt_out): Add overloads for
3474         char8_t.
3475         * include/bits/locale_facets.h (_GLIBCXX_NUM_UNICODE_FACETS): Bump
3476         for new char8_t specializations.
3477         * include/bits/localefwd.h: Add missing declarations of
3478         codecvt<char16_t, char, mbstate_t> and
3479         codecvt<char32_t, char, mbstate_t>.  Add char8_t declarations
3480         codecvt<char16_t, char8_t, mbstate_t> and
3481         codecvt<char32_t, char8_t, mbstate_t>.
3482         * include/bits/postypes.h: Add u8streampos
3483         * include/bits/stringfwd.h: Add declarations of
3484         char_traits<char8_t> and u8string.
3485         * include/c_global/cstddef: Add __byte_operand<char8_t>.
3486         * include/experimental/bits/fs_path.h (path::__is_encoded_char):
3487         Recognize char8_t.
3488         (path::u8string): Return std::u8string when char8_t support is
3489         enabled.
3490         (path::generic_u8string): Likewise.
3491         (path::_S_convert): Handle conversion from char8_t input.
3492         (path::_S_str_convert): Likewise.
3493         * include/experimental/string: Add u8string.
3494         * include/experimental/string_view: Add u8string_view,
3495         hash<experimental::u8string_view>, and
3496         operator""sv(const char8_t*, size_t).
3497         * include/std/atomic: Add atomic<char8_t> and atomic_char8_t.
3498         * include/std/charconv (__is_int_to_chars_type): Recognize char8_t
3499         as a character type.
3500         * include/std/limits: Add numeric_limits<char8_t>.
3501         * include/std/string_view: Add u8string_view,
3502         hash<experimental::u8string_view>, and
3503         operator""sv(const char8_t*, size_t).
3504         * include/std/type_traits: Add __is_integral_helper<char8_t>,
3505         __make_unsigned<char8_t>, and __make_signed<char8_t>.
3506         * libsupc++/atomic_lockfree_defines.h: Define
3507         ATOMIC_CHAR8_T_LOCK_FREE.
3508         * src/c++11/Makefile.am: Compile with -fchar8_t when compiling
3509         codecvt.cc and limits.cc so that char8_t specializations of
3510         numeric_limits and codecvt and emitted.
3511         * src/c++11/Makefile.in: Likewise.
3512         * src/c++11/codecvt.cc: Define members of
3513         codecvt<char16_t, char8_t, mbstate_t>,
3514         codecvt<char32_t, char8_t, mbstate_t>,
3515         codecvt_byname<char16_t, char8_t, mbstate_t>, and
3516         codecvt_byname<char32_t, char8_t, mbstate_t>.
3517         * src/c++11/limits.cc: Define members of
3518         numeric_limits<char8_t>.
3519         * src/c++98/Makefile.am: Compile with -fchar8_t when compiling
3520         locale_init.cc and localename.cc.
3521         * src/c++98/Makefile.in: Likewise.
3522         * src/c++98/locale_init.cc: Add initialization for the
3523         codecvt<char16_t, char8_t, mbstate_t> and
3524         codecvt<char32_t, char8_t, mbstate_t> facets.
3525         * src/c++98/localename.cc: Likewise.
3526         * testsuite/util/testsuite_abi.cc: Validate ABI bump.
3527
3528 2019-02-18  Wilco Dijkstra  <wdijkstr@arm.com>
3529
3530         * 27_io/filesystem/operations/all.cc: Add dg-require-filesystem-ts.
3531         * 27_io/filesystem/operations/resize_file.cc: Likewise.
3532         * 27_io/filesystem/path/generation/normal2.cc: Likewise.
3533
3534 2019-02-14  Jonathan Wakely  <jwakely@redhat.com>
3535
3536         * doc/xml/manual/status_cxx2020.xml: Update P0887R1 status.
3537         * doc/html/*: Regenerate.
3538
3539         * doc/xml/manual/status_cxx2017.xml: Add P0063R3 to status table.
3540         * doc/html/*: Regenerate.
3541
3542         * doc/xml/manual/intro.xml: Document LWG 2586 status.
3543         * include/bits/uses_allocator.h (__uses_alloc): Use const lvalue
3544         allocator type in is_constructible checks.
3545         * testsuite/20_util/scoped_allocator/69293_neg.cc: Adjust dg-error.
3546         * testsuite/20_util/scoped_allocator/dr2586.cc: New test.
3547         * testsuite/20_util/tuple/cons/allocators.cc: Add test using
3548         problematic type from LWG 2586 discussion.
3549         * testsuite/20_util/uses_allocator/69293_neg.cc: Adjust dg-error.
3550         * testsuite/20_util/uses_allocator/cons_neg.cc: Likewise.
3551
3552         * configure.ac: Check for C11 timespec_get function.
3553         * crossconfig.m4 (freebsd, linux, gnu, cygwin, solaris, netbsd)
3554         (openbsd): Likewise
3555         * config.h.in: Regenerate.
3556         * configure: Regenerate.
3557         * include/c_global/ctime (timespec, timespec_get): Add to namespace
3558         std for C++17 and up.
3559
3560         * doc/xml/manual/intro.xml: Document LWG 2537 status.
3561         * include/bits/stl_queue.h
3562         (priority_queue(const Compare&, const Container&, const Alloc&))
3563         (priority_queue(const Compare&, Container&&, const Alloc&)): Call
3564         make_heap.
3565         * testsuite/23_containers/priority_queue/dr2537.cc: New test.
3566
3567         * doc/xml/manual/intro.xml: Document LWG 2566 status.
3568         * include/bits/stl_queue.h (queue, priority_queue): Add static
3569         assertions to enforce LWG 2566 requirement on value_type.
3570         * include/bits/stl_stack.h (stack): Likewise.
3571
3572         PR middle-end/89303
3573         * testsuite/20_util/enable_shared_from_this/89303.cc: New test.
3574
3575         * doc/xml/manual/intro.xml: Document LWG 2735 status.
3576         * include/bits/std_abs.h: Add comment about LWG 2735.
3577         * testsuite/26_numerics/headers/cstdlib/dr2735.cc: New test.
3578
3579 2019-02-13  Jonathan Wakely  <jwakely@redhat.com>
3580
3581         PR libstdc++/89345
3582         * include/std/version [__cpp_impl_destroying_delete]
3583         (__cpp_lib_destroying_delete): Only define for C++2a and later.
3584         * libsupc++/new [__cpp_impl_destroying_delete]
3585         (__cpp_lib_destroying_delete): Likewise.
3586         (destroying_delete_t, destroying_delete): Likewise, but define even
3587         when __cpp_impl_destroying_delete is not defined.
3588         * testsuite/18_support/destroying_delete.cc: New test.
3589
3590 2019-02-11  Jonathan Wakely  <jwakely@redhat.com>
3591
3592         PR libstdc++/89023
3593         * testsuite/17_intro/headers/c++2011/parallel_mode.cc: New test.
3594         * testsuite/17_intro/headers/c++2014/parallel_mode.cc: New test.
3595         * testsuite/17_intro/headers/c++2017/parallel_mode.cc: New test.
3596         * testsuite/28_regex/headers/regex/parallel_mode.cc: Remove.
3597
3598 2019-02-09  Jonathan Wakely  <jwakely@redhat.com>
3599
3600         PR libstdc++/71044
3601         * include/bits/fs_path.h (path::has_root_name)
3602         (path::has_root_directory, path::has_root_path)
3603         (path::has_relative_path, path::has_parent_path)
3604         (path::has_filename, path::has_stem, path::has_extension)
3605         (path::is_absolute, path::is_relative, path::_M_find_extension): Add
3606         noexcept.
3607         * src/c++17/fs_path.cc (path::has_root_name)
3608         (path::has_root_directory, path::has_root_path)
3609         (path::has_relative_path, path::has_parent_path)
3610         (path::has_filename, path::_M_find_extension): Add noexcept.
3611
3612 2019-02-06  Jonathan Wakely  <jwakely@redhat.com>
3613
3614         PR libstdc++/89102 (partial)
3615         * include/std/type_traits (common_type<>): Define.
3616         (common_type<T>): Derive from common_type<T, T>.
3617         * testsuite/20_util/common_type/requirements/explicit_instantiation.cc:
3618         Test zero-length template argument list.
3619         * testsuite/20_util/common_type/requirements/sfinae_friendly_1.cc:
3620         Test additional single argument cases.
3621         * testsuite/20_util/common_type/requirements/sfinae_friendly_2.cc:
3622         Adjust expected error.
3623
3624 2019-02-05  Jonathan Wakely  <jwakely@redhat.com>
3625
3626         PR libstdc++/89128
3627         * include/bits/stl_queue.h (queue, priority_queue): Add deduction
3628         guides.
3629         * include/bits/stl_stack.h (stack): Likewise.
3630         * testsuite/23_containers/priority_queue/deduction.cc: New test.
3631         * testsuite/23_containers/queue/deduction.cc: New test.
3632         * testsuite/23_containers/stack/deduction.cc: New test.
3633
3634         PR libstdc++/89194
3635         * include/std/type_traits (__is_convertible_helper)
3636         (__is_convertible_helper<_From, _To, false>): Revert changes to
3637         support is_nothrow_convertible.
3638         (__is_nt_convertible_helper): New helper.
3639         (is_nothrow_convertible): Use __is_nt_convertible_helper.
3640
3641         * testsuite/23_containers/vector/modifiers/push_back/49836.cc: Restore
3642         use of CopyConsOnlyType, but also test DelAnyAssign for completeness.
3643
3644         PR libstdc++/89130
3645         * include/bits/alloc_traits.h (__is_copy_insertable_impl): Rename to
3646         __is_alloc_insertable_impl. Replace single type member with two
3647         members, one for each of copy and move insertable.
3648         (__is_move_insertable): New trait for internal use.
3649         * include/bits/stl_vector.h (vector::_S_nothrow_relocate(true_type))
3650         (vector::_S_nothrow_relocate(true_type)): New functions to
3651         conditionally check if __relocate_a can throw.
3652         (vector::_S_use_relocate()): Dispatch to _S_nothrow_relocate based
3653         on __is_move_insertable.
3654         (vector::_S_do_relocate): New overloaded functions to conditionally
3655         call __relocate_a.
3656         (vector::_S_relocate): New function that dispatches to _S_do_relocate
3657         based on _S_use_relocate.
3658         * include/bits/vector.tcc (vector::reserve, vector::_M_realloc_insert)
3659         (vector::_M_default_append): Call _S_relocate instead of __relocate_a.
3660         * testsuite/23_containers/vector/modifiers/push_back/89130.cc: New.
3661
3662         PR libstdc++/89090
3663         * include/bits/stl_uninitialized.h (__relocate_a_1): Make unused
3664         parameter unnamed. Add message to static assertion.
3665         * include/bits/vector.tcc (vector::reserve, vector::_M_realloc_insert)
3666         (vector::_M_default_append): Use _GLIBCXX17_CONSTEXPR for if constexpr
3667         in C++11 code.
3668
3669 2019-02-05  Marc Glisse  <marc.glisse@inria.fr>
3670
3671         PR libstdc++/87106
3672         * include/bits/stl_uninitialized.h (__is_trivially_relocatable):
3673         Rename...
3674         (__is_bitwise_relocatable): ... to this.
3675         (__relocate_a_1): Adapt.
3676         * include/bits/stl_deque.h (__is_trivially_relocatable): Rename...
3677         (__is_bitwise_relocatable): ... to this.
3678
3679 2019-01-30  Jonathan Wakely  <jwakely@redhat.com>
3680
3681         PR libstdc++/89117
3682         * src/c++17/fs_path.cc (path::replace_extension): Erase extension from
3683         final component as well as from _M_pathname. Append the dot using
3684         operator+= instead of only to _M_pathname.
3685         (path::_M_find_extension): Reformat slightly.
3686         * testsuite/27_io/filesystem/path/modifiers/replace_extension.cc:
3687         Add more test cases.
3688
3689 2019-01-30  Ulrich Drepper  <drepper@redhat.com>
3690
3691         * doc/xml/manual/status_cxx2020.xml: Update P0600 entry.
3692
3693 2019-01-29  Jonathan Wakely  <jwakely@redhat.com>
3694
3695         * testsuite/26_numerics/headers/complex/synopsis.cc: Remove incorrect
3696         constexpr specifiers from arg and proj.
3697
3698         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Add missing exports for
3699         __shared_ptr instantiations used by gcc4-compatible ABI.
3700
3701         * include/experimental/forward_list (experimental::erase): Qualify
3702         call to erase_if.
3703         * include/experimental/list (experimental::erase): Likewise.
3704         * include/std/forward_list (std::erase): Likewise.
3705         * include/std/list (std::erase): Likewise.
3706
3707         * testsuite/20_util/reference_wrapper/result_type.cc: Disable for
3708         C++2a.
3709         * testsuite/20_util/reference_wrapper/typedefs-2.cc: Likewise.
3710         * testsuite/20_util/reference_wrapper/typedefs-3.cc: Likewise.
3711         * testsuite/20_util/reference_wrapper/typedefs.cc: Likewise.
3712         * testsuite/30_threads/async/54297.cc: Suppress nodiscard warning.
3713         * testsuite/ext/array_allocator/26875.cc: Likewise.
3714         * testsuite/ext/pool_allocator/allocate_chunk.cc: Likewise.
3715         * testsuite/util/replacement_memory_operators.h: Likewise.
3716         * testsuite/util/testsuite_allocator.h: Likewise.
3717
3718         * include/std/memory_resource (__pool_resource::_M_unpooled): Use
3719         normal mode vector, even for debug mode.
3720         * include/std/vector [_GLIBCXX_DEBUG] (_GLIBCXX_STD_C::pmr::vector):
3721         Define alias template for normal mode vector.
3722
3723 2019-01-28  Jonathan Wakely  <jwakely@redhat.com>
3724
3725         PR libstdc++/68737
3726         * config/locale/generic/c_locale.h (__convert_from_v)
3727         [_GLIBCXX_USE_C99_STDIO]: Also check _GLIBCXX_HAVE_BROKEN_VSNPRINTF.
3728         * config/os/hpux/os_defines.h: Define _GLIBCXX_HAVE_BROKEN_VSNPRINTF.
3729         * include/bits/locale_facets.tcc (num_put::_M_insert_float)
3730         [_GLIBCXX_USE_C99_STDIO]: Also check _GLIBCXX_HAVE_BROKEN_VSNPRINTF.
3731
3732 2019-01-24  Jonathan Wakely  <jwakely@redhat.com>
3733
3734         PR libstdc++/88840
3735         * include/bits/stl_vector.h (vector::__use_relocate): Replace static
3736         data member with static member function _S_use_relocate().
3737         * include/bits/vector.tcc (vector::reserve, vector::_M_realloc_insert)
3738         (vector::_M_default_append): Use _S_use_relocate() instead of
3739         __use_relocate.
3740
3741         * testsuite/27_io/filesystem/path/compare/strings.cc: Only compare
3742         sign of results.
3743
3744 2019-01-22  Jonathan Wakely  <jwakely@redhat.com>
3745
3746         PR libstdc++/88740
3747         * testsuite/util/testsuite_hooks.h [stderr] (VERIFY): Use fprintf to
3748         write to stderr instead of using printf.
3749
3750 2019-01-21  Jakub Jelinek  <jakub@redhat.com>
3751
3752         PR libstdc++/86590
3753         * include/bits/char_traits.h (__constant_string_p,
3754         __constant_char_array_p): Use __builtin_is_constant_evaluated if
3755         available.
3756
3757 2019-01-20  Ulrich Drepper  <drepper@redhat.com>
3758
3759         Implement C++20 P0600r1.
3760         * include/backward/hash_map: Add nodiscard attribute to empty.
3761         * include/backward/hash_set: Likewise.
3762         * backward/hashtable.h: Likewise.
3763         * include/bits/basic_string.h: Likewise.
3764         * include/bits/forward_list.h: Likewise.
3765         * include/bits/hashtable.h: Likewise.
3766         * include/bits/regex.h: Likewise.
3767         * include/bits/stl_deque.h: Likewise.
3768         * include/bits/stl_list.h: Likewise.
3769         * include/bits/stl_map.h: Likewise.
3770         * include/bits/stl_multimap.h: Likewise.
3771         * include/bits/stl_multiset.h: Likewise.
3772         * include/bits/stl_queue.h: Likewise.
3773         * include/bits/stl_set.h: Likewise.
3774         * include/bits/stl_stack.h: Likewise.
3775         * include/bits/stl_tree.h: Likewise.
3776         * include/bits/stl_vector.h: Likewise.
3777         * include/bits/unordered_map.h: Likewise.
3778         * include/bits/unordered_set.h: Likewise.
3779         * include/debug/array: Likewise.
3780         * include/experimental/any: Likewise.
3781         * include/experimental/bits/fs_path.h: Likewise.
3782         * include/experimental/internet: Likewise.
3783         * include/experimental/string_view: Likewise.
3784         * include/ext/pb_ds/detail/bin_search_tree_/info_fn_imps.hpp:
3785         Likewise.
3786         * include/ext/pb_ds/detail/binary_heap_/binary_heap_.hpp:
3787         Likewise.
3788         * include/ext/pb_ds/detail/binary_heap_/info_fn_imps.hpp:
3789         Likewise.
3790         * include/ext/pb_ds/detail/cc_hash_table_map_/cc_ht_map_.hpp:
3791         Likewise.
3792         * include/ext/pb_ds/detail/cc_hash_table_map_/info_fn_imps.hpp:
3793         Likewise.
3794         * include/ext/pb_ds/detail/cc_hash_table_map_/size_fn_imps.hpp:
3795         Likewise.
3796         * include/ext/pb_ds/detail/gp_hash_table_map_/gp_ht_map_.hpp:
3797         Likewise.
3798         * include/ext/pb_ds/detail/gp_hash_table_map_/info_fn_imps.hpp:
3799         Likewise.
3800         * include/ext/pb_ds/detail/left_child_next_sibling_heap_/
3801         info_fn_imps.hpp: Likewise.
3802         * include/ext/pb_ds/detail/left_child_next_sibling_heap_/
3803         left_child_next_sibling_heap_.hpp: Likewise.
3804         * include/ext/pb_ds/detail/list_update_map_/info_fn_imps.hpp:
3805         Likewise.
3806         * include/ext/pb_ds/detail/list_update_map_/lu_map_.hpp:
3807         Likewise.
3808         * include/ext/pb_ds/detail/ov_tree_map_/info_fn_imps.hpp:
3809         Likewise.
3810         * include/ext/pb_ds/detail/ov_tree_map_/ov_tree_map_.hp:
3811         Likewise.
3812         * include/ext/pb_ds/detail/pat_trie_/info_fn_imps.hpp:
3813         Likewise.
3814         * include/ext/pb_ds/detail/pat_trie_/pat_trie_.hpp:
3815         Likewise.
3816         * include/ext/pb_ds/detail/rc_binomial_heap_/rc.hpp:
3817         Likewise.
3818         * include/ext/pb_ds/detail/tree_trace_base.hpp: Likewise.
3819         * include/ext/pb_ds/trie_policy.hpp: Likewise.
3820         * include/ext/rope: Likewise.
3821         * include/ext/slist: Likewise.
3822         * include/ext/vstring.h: Likewise.
3823         * include/profile/array: Likewise.
3824         * include/std/array: Likewise.
3825         * include/tr1/array: Likewise.
3826         * include/tr1/hashtable.h: Likewise.
3827         * include/tr1/regex: Likewise.
3828         * include/tr2/dynamic_bitset: Likewise.
3829         * include/bits/alloc_traits.h: Add nodiscard attribute to
3830         allocate.
3831         * include/experimental/memory_resource: Likewise.
3832         * include/ext/alloc_traits.h: Likewise.
3833         * include/ext/array_allocator.h: Likewise.
3834         * include/ext/bitmap_allocator.h: Likewise.
3835         * include/ext/debug_allocator.h: Likewise.
3836         * include/ext/extptr_allocator.h: Likewise.
3837         * include/ext/mt_allocator.h: Likewise.
3838         * include/ext/new_allocator.h: Likewise.
3839         * include/ext/pool_allocator.h: Likewise.
3840         * include/ext/throw_allocator.h: Likewise.
3841         * include/std/scoped_allocator: Likewise.
3842         * libsupc++/eh_alloc.cc: Likewise.
3843         * include/std/future: Add nodiscard attribute to async.
3844         * libsupc++/new: Add nodiscard attribute to new.
3845
3846 2019-01-18  Jonathan Wakely  <jwakely@redhat.com>
3847
3848         PR libstdc++/87514
3849         PR libstdc++/87520
3850         PR libstdc++/88782
3851         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Export new symbol.
3852         * include/bits/shared_ptr.h
3853         (shared_ptr(_Sp_make_shared_tag, const Alloc&, Args&&...))
3854         (allocate_shared): Change to use new tag type.
3855         * include/bits/shared_ptr_base.h (_Sp_make_shared_tag::_S_eq):
3856         Declare new member function.
3857         (_Sp_alloc_shared_tag): Define new type.
3858         (_Sp_counted_ptr_inplace): Declare __shared_count<_Lp> as a friend.
3859         (_Sp_counted_ptr_inplace::_M_get_deleter) [!__cpp_rtti]: Use
3860         _Sp_make_shared_tag::_S_eq to check type_info.
3861         (__shared_count(Ptr, Deleter),__shared_count(Ptr, Deleter, Alloc)):
3862         Constrain to prevent being called with _Sp_alloc_shared_tag.
3863         (__shared_count(_Sp_make_shared_tag, const _Alloc&, Args&&...)):
3864         Replace constructor with ...
3865         (__shared_count(Tp*&, _Sp_alloc_shared_tag<_Alloc>, Args&&...)): Use
3866         reference parameter so address of the new object can be returned to
3867         the caller. Obtain the allocator from the tag type.
3868         (__shared_ptr(_Sp_make_shared_tag, const Alloc&, Args&&...)): Replace
3869         constructor with ...
3870         (__shared_ptr(_Sp_alloc_shared_tag<Alloc>, Args&&...)): Pass _M_ptr
3871         to the __shared_count constructor.
3872         (__allocate_shared): Change to use new tag type.
3873         * src/c++11/shared_ptr.cc (_Sp_make_shared_tag::_S_eq): Define.
3874
3875 2019-01-17  Jonathan Wakely  <jwakely@redhat.com>
3876
3877         * src/c++17/fs_ops.cc
3878         (equivalent(const path&, const path&, error_code&))
3879         [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Use GetFileInformationByHandle to
3880         compare files instead of relying on incomplete info returned by stat.
3881
3882         PR libstdc++/88884
3883         * src/c++17/fs_ops.cc (absolute(const path&, error_code&)): Do nothing
3884         if the path is already absolute.
3885         [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Normalize root-directory.
3886         [!_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Pass error_code to current_path.
3887
3888         PR libstdc++/88881
3889         * src/c++17/fs_ops.cc (canonical(const path&, error_code&))
3890         [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Normalize path, to match behaviour
3891         of filesystem::exists.
3892         (create_directories(const path&, error_code&)): Add assertions.
3893         (status(const path&, error_code&)) [_GLIBCXX_FILESYSTEM_IS_WINDOWS]:
3894         Add workaround for bug in _wstat for paths with trailing slash.
3895         * testsuite/27_io/filesystem/operations/create_directories.cc: Adjust
3896         for expected behaviour on mingw.
3897         * testsuite/experimental/filesystem/operations/create_directories.cc:
3898         Likewise.
3899         * testsuite/27_io/filesystem/operations/temp_directory_path.cc: Use
3900         "TMP" instead of "TMPDIR" and clean environment before each test. Do
3901         not test permissions on mingw targets.
3902
3903 2019-01-16  Jonathan Wakely  <jwakely@redhat.com>
3904
3905         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Add exports for fstream
3906         constructors and open members taking wide strings. Fix patterns for
3907         filesystem::path members to match wstring_view parameters. Add
3908         exports for shared_ptr members used by directory iterators.
3909         * src/c++17/fs_ops.cc (remove(const path&, error_code&)): Clear the
3910         error code parameter if the file doesn't exist.
3911         * src/filesystem/ops.cc (remove(const path&, error_code&)):
3912         Likewise.
3913         * testsuite/27_io/filesystem/operations/canonical.cc: Fix expected
3914         values for mingw targets, where "/" is not an absolute path. Do not
3915         test symlinks on mingw targets.
3916         * testsuite/experimental/filesystem/operations/canonical.cc: Likewise.
3917         * testsuite/27_io/filesystem/operations/copy.cc: Do not test symlinks
3918         on mingw targets.
3919         * testsuite/experimental/filesystem/operations/copy.cc: Likewise.
3920         * testsuite/27_io/filesystem/operations/create_directories.cc: Check
3921         that each component of the path is created.
3922         * testsuite/experimental/filesystem/operations/create_directories.cc:
3923         Likewise.
3924         * testsuite/27_io/filesystem/operations/exists.cc: Do not test
3925         permissions on mingw targets.
3926         * testsuite/experimental/filesystem/operations/exists.cc: Likewise.
3927         * testsuite/27_io/filesystem/operations/is_empty.cc: Likewise.
3928         * testsuite/experimental/filesystem/operations/is_empty.cc: Likewise.
3929         * testsuite/27_io/filesystem/operations/permissions.cc: XFAIL for
3930         mingw targets.
3931         * testsuite/experimental/filesystem/operations/permissions.cc:
3932         Likewise.
3933         * testsuite/27_io/filesystem/operations/remove.cc: Do not test
3934         symlinks or permissions on mingw targets.
3935         * testsuite/experimental/filesystem/operations/remove.cc: Likewise.
3936         * testsuite/27_io/filesystem/operations/remove_all.cc: Do not test
3937         symlinks on mingw targets.
3938         * testsuite/experimental/filesystem/operations/remove_all.cc:
3939         Likewise.
3940         * testsuite/27_io/filesystem/operations/status.cc: Do not test
3941         permissions on mingw targets.
3942         * testsuite/27_io/filesystem/operations/weakly_canonical.cc: Do not
3943         test symlinks on mingw targets.
3944         * testsuite/experimental/filesystem/operations/space.cc: Fix test
3945         for mingw targets.
3946
3947 2019-02-14  Ulrich Drepper  <drepper@redhat.com>
3948
3949         PR libstdc++/88738
3950         Warn about unused comparisons of shared_ptr/unique_ptr
3951         * include/bits/c++config [_GLIBCXX_NODISCARD]: Define.
3952         * include/bits/shared_ptr.h: Use it for operator ==, !=,
3953         <, <=, >, >= for shared_ptr.
3954         * include/bits/unique_ptr.h: Likewise for unique_ptr.
3955
3956 2019-01-15  Jonathan Wakely  <jwakely@redhat.com>
3957
3958         * include/bits/shared_ptr_base.h (__cpp_lib_shared_ptr_arrays): Define
3959         as 201611L, because P0497R0 changes are supported.
3960         * include/std/version (__cpp_lib_shared_ptr_arrays): Likewise.
3961
3962         * include/bits/erase_if.h [__cplusplus > 201703L]
3963         (__cpp_lib_erase_if): Only define for C++2a.
3964         * include/std/iterator [__cplusplus >= 201402L && !_GLIBCXX_DEBUG]
3965         (__cpp_lib_null_iterators): Define.
3966         * include/std/version [__cplusplus >= 201402L && !_GLIBCXX_DEBUG]
3967         (__cpp_lib_null_iterators): Define.
3968         [__cpp_impl_destroying_delete] (__cpp_lib_destroying_delete): Define.
3969
3970         * doc/xml/manual/status_cxx2017.xml: Document P0032R3 and P0307R2
3971         status.
3972         * include/bits/stl_uninitialized.h (__cpp_lib_raw_memory_algorithms):
3973         Define.
3974         * include/std/any (__cpp_lib_any): Define as 201606L, because P0032R3
3975         changes are supported.
3976         * include/std/optional (__cpp_lib_optional): Likewise.
3977         * include/std/variant (__cpp_lib_variant): Likewise.
3978         * include/std/version [!__STRICT_ANSI__]
3979         (__cpp_lib_uncaught_exceptions): Define as long integer.
3980         [__cplusplus >= 201703L] (__cpp_lib_any)
3981         (__cpp_lib_raw_memory_algorithms, __cpp_lib_uncaught_exceptions)
3982         (__cpp_lib_variant): Define for C++17.
3983         [__cplusplus >= 201703L] (__cpp_lib_optional): Update value and define
3984         as long integer.
3985         * libsupc++/exception (__cpp_lib_uncaught_exceptions): Define as long
3986         integer.
3987
3988         * doc/xml/manual/status_cxx2020.xml: Update P1123R0 status.
3989
3990 2019-01-12  Jonathan Wakely  <jwakely@redhat.com>
3991
3992         PR libstdc++/88811
3993         PR libstdc++/83306
3994         * src/filesystem/path.cc: Fix typo. If first path is empty, show []
3995         before second path.
3996         * testsuite/experimental/filesystem/filesystem_error/cons.cc: New
3997         test.
3998
3999 2019-01-11  Jonathan Wakely  <jwakely@redhat.com>
4000
4001         * doc/xml/manual/intro.xml: Include new section.
4002         * doc/xml/manual/status_cxx2017.xml: Document more
4003         implementation-defined properties of the library.
4004         * doc/xml/manual/status_cxx2020.xml: Document C++2a status.
4005         * doc/html/*: Regenerate.
4006
4007         * include/bits/refwrap.h [__cplusplus > 201703L]
4008         (_Refwrap_base_arg1, _Refwrap_base_arg2, _Reference_wrapper_base)
4009         (_Reference_wrapper_base_memfun): Do not define for C++2a.
4010         (reference_wrapper): Do not derive from _Reference_wrapper_base_memfun
4011         for C++2a.
4012         (reference_wrapper::operator()): Add static assertion.
4013         * testsuite/20_util/reference_wrapper/incomplete.cc: New test.
4014
4015         * include/std/chrono (duration_values::zero(), duration_values::min())
4016         (duration_values::max()): Add noexcept.
4017         (duration::zero(), duration::min(), duration::max()): Likewise.
4018         (time_point::zero(), time_point::min(), time_point::max()): Likewise.
4019         * testsuite/20_util/duration/requirements/noexcept.cc: New test.
4020         * testsuite/20_util/time_point/requirements/noexcept.cc: New test.
4021
4022         * include/std/version (__cpp_lib_erase_if): Move to C++20 group.
4023
4024 2019-01-11  Jakub Jelinek  <jakub@redhat.com>
4025
4026         * include/std/type_traits (__cpp_lib_is_constant_evaluated): Define.
4027         * include/std/version (__cpp_lib_is_constant_evaluated): Define.
4028
4029 2019-01-11  Jonathan Wakely  <jwakely@redhat.com>
4030
4031         PR libstdc++/88802
4032         * include/bits/functional_hash.h (hash<nullptr_t>): Define
4033         specialization for C++17 (P0513R0, LWG 2817).
4034         * testsuite/20_util/hash/nullptr.cc: New test.
4035
4036         PR libstdc++/88125
4037         * config/abi/pre/gnu.ver (GLIBCXX_3.4.6): Remove unused duplicate
4038         pattern for std::basic_stringbuf::str().
4039
4040         * config/abi/pre/gnu.ver (GLIBCXX_3.4): Correct recent changes to
4041         basic_ostream::operator<< patterns.
4042
4043 2019-01-10  Jonathan Wakely  <jwakely@redhat.com>
4044
4045         * testsuite/27_io/filesystem/operations/last_write_time.cc: Fix
4046         test failures on targets with 32-bit time_t.
4047
4048         * include/bits/erase_if.h: Define __cpp_lib_erase_if.
4049         * include/std/deque: Likewise.
4050         * include/std/forward_list: Likewise.
4051         * include/std/list: Likewise.
4052         * include/std/string: Likewise.
4053         * include/std/vector: Likewise.
4054         * include/std/version: Likewise.
4055         * testsuite/21_strings/basic_string/erasure.cc: Test macro.
4056         * testsuite/23_containers/deque/erasure.cc: Likewise.
4057         * testsuite/23_containers/forward_list/erasure.cc: Likewise.
4058         * testsuite/23_containers/list/erasure.cc: Likewise.
4059         * testsuite/23_containers/map/erasure.cc: Likewise.
4060         * testsuite/23_containers/set/erasure.cc: Likewise.
4061         * testsuite/23_containers/unordered_map/erasure.cc: Likewise.
4062         * testsuite/23_containers/unordered_set/erasure.cc: Likewise.
4063         * testsuite/23_containers/vector/erasure.cc: Likewise.
4064
4065         * include/experimental/internet [AI_NUMERICSERV]
4066         (resolver_base::numeric_service): Define conditionally.
4067         * testsuite/experimental/net/internet/resolver/base.cc: Test it
4068         conditionally.
4069         * testsuite/experimental/net/internet/resolver/ops/lookup.cc:
4070         Likewise.
4071
4072 2019-01-10  Ville Voutilainen  <ville.voutilainen@gmail.com>
4073             Jonathan Wakely  <jwakely@redhat.com>
4074
4075         Implement LWG 2221
4076         * config/abi/pre/gnu.ver (GLIBCXX_3.4): Tighten patterns.
4077         (GLIBCXX_3.4.26): Add new exports.
4078         * include/Makefile.am: Add ostream-inst.cc. Move string-inst.cc to
4079         correct list of sources.
4080         * include/Makefile.in: Regenerate.
4081         * include/std/ostream (operator<<(nullptr_t)): New member function.
4082         * src/c++17/ostream-inst.cc: New file.
4083         * testsuite/27_io/basic_ostream/inserters_other/char/lwg2221.cc: New
4084         test.
4085
4086 2019-01-10  Jonathan Wakely  <jwakely@redhat.com>
4087
4088         * testsuite/util/testsuite_fs.h (nonexistent_path): Include name
4089         of the source file containing the caller.
4090         * testsuite/27_io/filesystem/iterators/directory_iterator.cc: Remove
4091         directories created by test.
4092         * testsuite/27_io/filesystem/iterators/recursive_directory_iterator.cc:
4093         Likewise.
4094         * testsuite/experimental/filesystem/iterators/directory_iterator.cc:
4095         Likewise.
4096         * testsuite/experimental/filesystem/iterators/
4097         recursive_directory_iterator.cc: Likewise.
4098
4099 2019-01-10  Jakub Jelinek  <jakub@redhat.com>
4100
4101         PR tree-optimization/88775
4102         * include/bits/stl_function.h (greater<_Tp*>::operator(),
4103         less<_Tp*>::operator(), greater_equal<_Tp*>::operator(),
4104         less_equal<_Tp*>::operator()): Use __builtin_is_constant_evaluated
4105         instead of __builtin_constant_p if available.  Don't bother with
4106         the pointer comparison in C++11 and earlier.
4107
4108 2019-01-09  Sandra Loosemore  <sandra@codesourcery.com>
4109
4110         PR other/16615
4111
4112         * include/ext/bitmap_allocator.h: Mechanically replace "can not"
4113         with "cannot".
4114
4115 2019-01-09  Jonathan Wakely  <jwakely@redhat.com>
4116
4117         * testsuite/libstdc++-prettyprinters/cxx17.cc: Fix expected output
4118         for filesystem::path. Give variables more distinctive names.
4119
4120         * include/std/optional (_Optional_payload_base::_M_copy_assign): New
4121         member function to perform non-trivial assignment.
4122         (_Optional_payload_base::_M_move_assign): Likewise.
4123         (_Optional_payload<T, true, false, true>::operator=)
4124         (_Optional_payload<T, true, true, false>::operator=)
4125         (_Optional_payload<T, true, false, false>::operator=): Call
4126         _M_copy_assign and/or _M_move_assign to do non-trivial assignments.
4127
4128         PR libstdc++/88204
4129         * testsuite/26_numerics/complex/operators/more_constexpr.cc: Do not
4130         test std::complex<long double> if long double format is IBM128.
4131         * testsuite/26_numerics/complex/requirements/more_constexpr.cc:
4132         Likewise.
4133
4134 2019-01-08  Jonathan Wakely  <jwakely@redhat.com>
4135
4136         * testsuite/libstdc++-prettyprinters/compat.cc: Test printer support
4137         for old std::unique_ptr layout.
4138         * testsuite/libstdc++-prettyprinters/cxx17.cc: Fix std::variant test
4139         to become valueless. Add filesystem::path tests.
4140
4141         PR libstdc++/87855
4142         * include/std/optional (_Optional_payload_base): New class template
4143         for common code hoisted from _Optional_payload specializations. Use
4144         a template for the union, to allow a partial specialization for
4145         types with non-trivial destructors. Add constructors for in-place
4146         initialization to the union.
4147         (_Optional_payload(bool, const _Optional_payload&)): Use _M_construct
4148         to perform non-trivial copy construction, instead of relying on
4149         non-standard copy elision in a delegating constructor.
4150         (_Optional_payload(bool, _Optional_payload&&)): Likewise for
4151         non-trivial move construction.
4152         (_Optional_payload): Derive from _Optional_payload_base and use it
4153         for everything except the non-trivial assignment operators, which are
4154         defined as needed.
4155         (_Optional_payload<false, C, M>): Derive from the specialization
4156         _Optional_payload<true, false, false> and add a destructor.
4157         (_Optional_base_impl::_M_destruct, _Optional_base_impl::_M_reset):
4158         Forward to corresponding members of _Optional_payload.
4159         (_Optional_base_impl::_M_is_engaged, _Optional_base_impl::_M_get):
4160         Hoist common members from _Optional_base.
4161         (_Optional_base): Make all members and base class public.
4162         (_Optional_base::_M_get, _Optional_base::_M_is_engaged): Move to
4163         _Optional_base_impl.
4164         * python/libstdcxx/v6/printers.py (StdExpOptionalPrinter): Add
4165         support for new std::optional layout.
4166         * testsuite/libstdc++-prettyprinters/compat.cc: New test.
4167
4168         PR libstdc++/88066
4169         * include/bits/locale_conv.h: Use <> for includes not "".
4170         * include/ext/random: Likewise.
4171         * include/ext/vstring.h: Likewise.
4172
4173 2019-01-08  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
4174
4175         * config/abi/pre/gnu.ver (GLIBCXX_3.4): Tighten existing patterns.
4176         (GLIBCXX_3.4.21): Likewise.
4177
4178 2019-01-08  Jonathan Wakely  <jwakely@redhat.com>
4179
4180         PR libstdc++/88749
4181         * src/filesystem/ops.cc (last_write_time): Fix preprocessor condition
4182         to match the one that controls whether utimbuf and utime are declared.
4183
4184 2019-01-07  Jonathan Wakely  <jwakely@redhat.com>
4185
4186         PR libstdc++/87787
4187         * include/bits/char_traits.h (char_traits::move): Do not pass null
4188         pointers to memmove.
4189         * include/bits/locale_facets.h
4190         (ctype<char>::widen(const char*, const char*, char*)): Do not
4191         pass null pointers to memcpy.
4192         (ctype<char>::narrow(const char*, const char*, char, char*)):
4193         Likewise.
4194         (ctype<char>::do_widen(const char*, const char*, char*)):
4195         Likewise.
4196         (ctype<char>::do_narrow(const char*, const char*, char, char*)):
4197         Likewise.
4198
4199         * doc/xml/manual/spine.xml: Update copyright years.
4200         * doc/xml/manual/status_cxx2017.xml: Adjust note about -lstdc++fs.
4201         * doc/xml/manual/using.xml: Remove requirement to link with -lstdc++fs
4202         for C++17 filesystem library.
4203         * doc/html/*: Regenerate.
4204
4205         * acinclude.m4 (GLIBCXX_CHECK_FILESYSTEM_DEPS): Check for truncate.
4206         * config.h.in: Regenerate.
4207         * config/abi/pre/gnu.ver: Order patterns for filesystem operations
4208         alphabetically and add missing entries for copy_symlink,
4209         hard_link_count, rename, and resize_file.
4210         * configure: Regenerate.
4211         * src/c++17/fs_ops.cc (resize_file): Remove #if so posix::truncate is
4212         used unconditionally.
4213         * src/filesystem/ops-common.h (__gnu_posix::truncate)
4214         [!_GLIBCXX_HAVE_TRUNCATE]: Provide fallback definition that only
4215         supports truncating to zero length.
4216         * testsuite/27_io/filesystem/operations/all.cc: New test.
4217         * testsuite/27_io/filesystem/operations/resize_file.cc: New test.
4218
4219 2019-01-06  Jonathan Wakely  <jwakely@redhat.com>
4220
4221         PR libstdc++/86756
4222         * acinclude.m4 (GLIBCXX_CHECK_FILESYSTEM_DEPS): Check for utime and
4223         lstat and define _GLIBCXX_USE_UTIME and _GLIBCXX_USE_LSTAT.
4224         * config.h.in: Regenerate.
4225         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Export symbols for
4226         remaining std::filesystem types and functions.
4227         * configure: Regenerate.
4228         * src/c++17/Makefile.am: Add C++17 filesystem sources.
4229         * src/c++17/Makefile.in: Regenerate.
4230         * src/c++17/cow-fs_dir.cc: Move src/filesystem/cow-std-dir.cc to
4231         here, and change name of included file.
4232         * src/c++17/cow-fs_ops.cc: Move src/filesystem/cow-std-ops.cc to
4233         here, and change name of included file.
4234         * src/c++17/fs_dir.cc: Move src/filesystem/std-dir.cc to here. Change
4235         path to dir-common.h.
4236         * src/c++17/fs_ops.cc: Move src/filesystem/std-ops.cc to here. Change
4237         path to ops-common.h. Disable -Wunused-parameter warnings.
4238         (internal_file_clock): Define unconditionally.
4239         [!_GLIBCXX_HAVE_SYS_STAT_H] (internal_file_clock::from_stat): Do not
4240         define.
4241         (do_copy_file, do_space): Move definitions to ops.common.h.
4242         (copy, file_size, hard_link_count, last_write_time, space): Only
4243         perform operation when _GLIBCXX_HAVE_SYS_STAT_H is defined, otherwise
4244         report an error.
4245         (last_write_time, read_symlink): Remove unused attributes from
4246         parameters.
4247         * src/filesystem/Makefile.am: Remove C++17 filesystem sources.
4248         * src/filesystem/Makefile.in: Regenerate.
4249         * src/filesystem/cow-std-dir.cc: Move to src/c++17/cow-fs_dir.cc.
4250         * src/filesystem/cow-std-ops.cc: Move to src/c++17/cow-fs_ops.cc.
4251         * src/filesystem/std-dir.cc: Move to src/c++17/fs_dir.cc.
4252         * src/filesystem/std-ops.cc: Move to src/c++17/fs_ops.cc.
4253         * src/filesystem/dir-common.h [!_GLIBCXX_HAVE_DIRENT_H]: Define
4254         dummy types and functions instead of using #error.
4255         * src/filesystem/dir.cc [!_GLIBCXX_HAVE_DIRENT_H]: Use #error.
4256         * src/filesystem/ops-common.h [!_GLIBCXX_USE_LSTAT] (lstat): Define
4257         in terms of stat.
4258         [!_GLIBCXX_HAVE_UNISTD_H]: Define dummy types and functions.
4259         (do_copy_file, do_space): Move definitions here from std-ops.cc.
4260         * src/filesystem/ops.cc: Adjust calls to do_copy_file and do_space
4261         to account for new namespace.
4262         * testsuite/27_io/filesystem/directory_entry/86597.cc: Remove
4263         -lstdc++fs from dg-options.
4264         * testsuite/27_io/filesystem/directory_entry/lwg3171.cc: Likewise.
4265         * testsuite/27_io/filesystem/file_status/1.cc: Likewise.
4266         * testsuite/27_io/filesystem/filesystem_error/cons.cc: Likewise.
4267         * testsuite/27_io/filesystem/filesystem_error/copy.cc: Likewise.
4268         * testsuite/27_io/filesystem/iterators/directory_iterator.cc:
4269         Likewise.
4270         * testsuite/27_io/filesystem/iterators/pop.cc: Likewise.
4271         * testsuite/27_io/filesystem/iterators/recursive_directory_iterator.cc:
4272         Likewise.
4273         * testsuite/27_io/filesystem/operations/absolute.cc: Likewise.
4274         * testsuite/27_io/filesystem/operations/canonical.cc: Likewise.
4275         * testsuite/27_io/filesystem/operations/copy.cc: Likewise.
4276         * testsuite/27_io/filesystem/operations/copy_file.cc: Likewise.
4277         * testsuite/27_io/filesystem/operations/create_directories.cc:
4278         Likewise.
4279         * testsuite/27_io/filesystem/operations/create_directory.cc: Likewise.
4280         * testsuite/27_io/filesystem/operations/create_symlink.cc: Likewise.
4281         * testsuite/27_io/filesystem/operations/current_path.cc: Likewise.
4282         * testsuite/27_io/filesystem/operations/equivalent.cc: Likewise.
4283         * testsuite/27_io/filesystem/operations/exists.cc: Likewise.
4284         * testsuite/27_io/filesystem/operations/file_size.cc: Likewise.
4285         * testsuite/27_io/filesystem/operations/is_empty.cc: Likewise.
4286         * testsuite/27_io/filesystem/operations/last_write_time.cc: Likewise.
4287         * testsuite/27_io/filesystem/operations/permissions.cc: Likewise.
4288         * testsuite/27_io/filesystem/operations/proximate.cc: Likewise.
4289         * testsuite/27_io/filesystem/operations/read_symlink.cc: Likewise.
4290         * testsuite/27_io/filesystem/operations/relative.cc: Likewise.
4291         * testsuite/27_io/filesystem/operations/remove.cc: Likewise.
4292         * testsuite/27_io/filesystem/operations/remove_all.cc: Likewise.
4293         * testsuite/27_io/filesystem/operations/space.cc: Likewise.
4294         * testsuite/27_io/filesystem/operations/status.cc: Likewise.
4295         * testsuite/27_io/filesystem/operations/symlink_status.cc: Likewise.
4296         * testsuite/27_io/filesystem/operations/temp_directory_path.cc:
4297         Likewise.
4298         * testsuite/27_io/filesystem/operations/weakly_canonical.cc: Likewise.
4299
4300
4301         PR libstdc++/86756
4302         * config/abi/pre/gnu.ver (GLIBCXX_3.4): Make various patterns for
4303         typeinfo and vtables less greedy.
4304         (GLIBCXX_3.4.26): Export symbols for std::filesystem::path.
4305         * src/c++17/Makefile.am: Add fs_path.cc and cow-fs_path.cc.
4306         * src/c++17/Makefile.in: Regenerate.
4307         * src/c++17/cow-fs_path.cc: Move src/filesystem/cow-std-path.cc to
4308         here, and change name of included file.
4309         * src/c++17/fs_path.cc: Move src/filesystem/std-path.cc to here.
4310         * src/filesystem/Makefile.am: Remove std-path.cc and cow-std-path.cc
4311         from sources.
4312         * src/filesystem/Makefile.in: Regenerate.
4313         * src/filesystem/cow-std-path.cc: Move to src/c++17/cow-fs_path.cc.
4314         * src/filesystem/std-path.cc: Move to src/c++17/fs_path.cc.
4315         * testsuite/27_io/filesystem/path/append/path.cc: Remove -lstdc++fs
4316         from dg-options and remove dg-require-filesystem-ts.
4317         * testsuite/27_io/filesystem/path/append/source.cc: Likewise.
4318         * testsuite/27_io/filesystem/path/assign/assign.cc: Likewise.
4319         * testsuite/27_io/filesystem/path/assign/copy.cc: Likewise.
4320         * testsuite/27_io/filesystem/path/compare/compare.cc: Likewise.
4321         * testsuite/27_io/filesystem/path/compare/lwg2936.cc: Likewise.
4322         * testsuite/27_io/filesystem/path/compare/path.cc: Likewise.
4323         * testsuite/27_io/filesystem/path/compare/strings.cc: Likewise.
4324         * testsuite/27_io/filesystem/path/concat/path.cc: Likewise.
4325         * testsuite/27_io/filesystem/path/concat/strings.cc: Likewise.
4326         * testsuite/27_io/filesystem/path/construct/80762.cc: Likewise.
4327         * testsuite/27_io/filesystem/path/construct/copy.cc: Likewise.
4328         * testsuite/27_io/filesystem/path/construct/default.cc: Likewise.
4329         * testsuite/27_io/filesystem/path/construct/format.cc: Likewise.
4330         * testsuite/27_io/filesystem/path/construct/locale.cc: Likewise.
4331         * testsuite/27_io/filesystem/path/construct/range.cc: Likewise.
4332         * testsuite/27_io/filesystem/path/construct/string_view.cc: Likewise.
4333         * testsuite/27_io/filesystem/path/decompose/extension.cc: Likewise.
4334         * testsuite/27_io/filesystem/path/decompose/filename.cc: Likewise.
4335         * testsuite/27_io/filesystem/path/decompose/parent_path.cc: Likewise.
4336         * testsuite/27_io/filesystem/path/decompose/relative_path.cc: Likewise.
4337         * testsuite/27_io/filesystem/path/decompose/root_directory.cc:
4338         Likewise.
4339         * testsuite/27_io/filesystem/path/decompose/root_name.cc: Likewise.
4340         * testsuite/27_io/filesystem/path/decompose/root_path.cc: Likewise.
4341         * testsuite/27_io/filesystem/path/decompose/stem.cc: Likewise.
4342         * testsuite/27_io/filesystem/path/generation/normal.cc: Likewise.
4343         * testsuite/27_io/filesystem/path/generation/normal2.cc: Likewise.
4344         * testsuite/27_io/filesystem/path/generation/proximate.cc: Likewise.
4345         * testsuite/27_io/filesystem/path/generation/relative.cc: Likewise.
4346         * testsuite/27_io/filesystem/path/generic/generic_string.cc: Likewise.
4347         * testsuite/27_io/filesystem/path/itr/components.cc: Likewise.
4348         * testsuite/27_io/filesystem/path/itr/traversal.cc: Likewise.
4349         * testsuite/27_io/filesystem/path/modifiers/clear.cc: Likewise.
4350         * testsuite/27_io/filesystem/path/modifiers/make_preferred.cc:
4351         Likewise.
4352         * testsuite/27_io/filesystem/path/modifiers/remove_filename.cc:
4353         Likewise.
4354         * testsuite/27_io/filesystem/path/modifiers/replace_extension.cc:
4355         Likewise.
4356         * testsuite/27_io/filesystem/path/modifiers/replace_filename.cc:
4357         Likewise.
4358         * testsuite/27_io/filesystem/path/modifiers/swap.cc: Likewise.
4359         * testsuite/27_io/filesystem/path/native/string.cc: Likewise.
4360         * testsuite/27_io/filesystem/path/nonmember/append.cc: Likewise.
4361         * testsuite/27_io/filesystem/path/nonmember/hash_value.cc: Likewise.
4362         * testsuite/27_io/filesystem/path/query/empty.cc: Likewise.
4363         * testsuite/27_io/filesystem/path/query/has_extension.cc: Likewise.
4364         * testsuite/27_io/filesystem/path/query/has_filename.cc: Likewise.
4365         * testsuite/27_io/filesystem/path/query/has_parent_path.cc: Likewise.
4366         * testsuite/27_io/filesystem/path/query/has_relative_path.cc: Likewise.
4367         * testsuite/27_io/filesystem/path/query/has_root_directory.cc:
4368         Likewise.
4369         * testsuite/27_io/filesystem/path/query/has_root_name.cc: Likewise.
4370         * testsuite/27_io/filesystem/path/query/has_root_path.cc: Likewise.
4371         * testsuite/27_io/filesystem/path/query/has_stem.cc: Likewise.
4372         * testsuite/27_io/filesystem/path/query/is_absolute.cc: Likewise.
4373         * testsuite/27_io/filesystem/path/query/is_relative.cc: Likewise.
4374
4375         PR libstdc++/87431
4376         * include/std/variant (_Variant_storage<true, _Types...>::_M_valid):
4377         Check is_trivially_copyable instead of is_scalar.
4378         (variant::emplace<N, Args>(Args&&...)): If construction of the new
4379         contained value can throw and its type is trivially copyable then
4380         construct into a temporary variant and move from it, to provide the
4381         strong exception safety guarantee.
4382         (variant::emplace<N, U, Args>(initializer_list<U>, Args&&...)):
4383         Likewise.
4384         * testsuite/20_util/variant/87431.cc: New test.
4385         * testsuite/20_util/variant/run.cc: Adjust test so that throwing
4386         conversion causes valueless state.
4387
4388         PR libstdc++/88607
4389         * testsuite/17_intro/headers/c++1998/charset.cc: New test.
4390         * testsuite/17_intro/headers/c++2011/charset.cc: New test.
4391         * testsuite/17_intro/headers/c++2014/charset.cc: New test.
4392         * testsuite/17_intro/headers/c++2017/charset.cc: New test.
4393         * testsuite/17_intro/headers/c++2020/charset.cc: New test.
4394
4395 2019-01-05  Jonathan Wakely  <jwakely@redhat.com>
4396
4397         * include/bits/fs_fwd.h (__file_clock): Define new clock.
4398         (file_time_type): Redefine in terms of __file_clock.
4399         * src/filesystem/ops-common.h (file_time): Add FIXME comment about
4400         overflow.
4401         * src/filesystem/std-ops.cc (is_set(perm_options, perm_options)): Give
4402         internal linkage.
4403         (internal_file_lock): New helper type for accessing __file_clock.
4404         (do_copy_file): Use internal_file_lock to convert system time to
4405         file_time_type.
4406         (last_write_time(const path&, error_code&)): Likewise.
4407         (last_write_time(const path&, file_time_type, error_code&)): Likewise.
4408
4409 2019-01-04  Jonathan Wakely  <jwakely@redhat.com>
4410
4411         * config/abi/pre/gnu.ver (GLIBCXX_3.4.21): Make patterns less greedy
4412         for const member functions of std::basic_string.
4413         (GLIBCXX_3.4.26): Export member functions of std::basic_string added
4414         in C++17.
4415         * include/bits/basic_string.h (basic_string(__sv_wrapper, const A&)):
4416         Make non-standard constructor private.
4417         [!_GLIBCXX_USE_CXX11_ABI] (basic_string(__sv_wrapper, const A&)):
4418         Likewise.
4419         * include/bits/basic_string.tcc (std::string, std::wstring): Declare
4420         explicit instantiations for C++17 as well as earlier dialects.
4421         * src/c++17/Makefile.am: Add new source files.
4422         * src/c++17/Makefile.in: Regenerate.
4423         * src/c++17/cow-string-inst.cc: New file defining explicit
4424         instantiations for basic_string member functions added in C++17.
4425         * src/c++17/string-inst.cc: Likewise.
4426
4427         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Export allocator-extended
4428         copy/move constructors for old std::basic_string.
4429         * include/bits/basic_string.h [!_GLIBCXX_USE_CXX11_ABI]
4430         (basic_string::reference, basic_string::const_reference): Define
4431         as plain references for C++11 and later.
4432         (basic_string::basic_string()): Put constructor body outside
4433         preprocessor conditional groups.
4434         (basic_string::basic_string(basic_string&&)): Move _Alloc_hider
4435         instead of copying it.
4436         (basic_string::basic_string(const basic_string&, const _Alloc&)):
4437         Define.
4438         (basic_string::basic_string(basic_string&&, const _Alloc&)):
4439         Define.
4440         * include/bits/fs_path.h [!_GLIBCXX_USE_CXX11_ABI]: Remove special
4441         cases for old basic_string.
4442         * testsuite/21_strings/basic_string/cons/char/8.cc: Test
4443         allocator-extended constructors unconditionally. Add extra members to
4444         allocator type when using old string ABI.
4445         * testsuite/21_strings/basic_string/allocator/71964.cc: Enable test
4446         for old string ABI.
4447         * testsuite/21_strings/basic_string/cons/wchar_t/8.cc: Likewise.
4448
4449         * testsuite/23_containers/list/61347.cc: Avoid spurious failure when
4450         -fno-inline added to test flags.
4451
4452         * testsuite/21_strings/basic_string/requirements/
4453         explicit_instantiation/debug.cc: Remove XFAIL for old ABI.
4454
4455         * testsuite/27_io/filesystem/filesystem_error/copy.cc: Fix static
4456         assertion failures with old std::string ABI.
4457
4458         * include/bits/fs_path.h (path::_List::erase): Replace both overloads
4459         with ...
4460         (path::pop_back(), path::_M_erase_from(const_iterator)): New member
4461         functions that will only erase elements at the end.
4462         * src/filesystem/std-path.cc (path::_List::_Impl::pop_back()): Define.
4463         (path::_List::_Impl::_M_erase_from(const_iterator)): Define.
4464         (path::_List::operator=(const _List&)): Use _M_erase_from(p) instead
4465         of erase(p, end()).
4466         (path::_List::pop_back()): Define.
4467         (path::_List::_M_erase_from(const_iterator)): Define.
4468         (path::operator/=(const path&)): Use pop_back to remove last component
4469         and _M_erase_from to remove multiple components.
4470         (path::_M_append(basic_string_view<value_type>)): Likewise.
4471         (path::operator+=(const path&)): Likewise.
4472         (path::_M_concat(basic_string_view<value_type>)): Likewise.
4473         (path::remove_filename()): Likewise.
4474         (path::lexically_normal()): Use _List::_Impl iterators instead of
4475         path::iterator. Use pop_back to remove components from the end. Clear
4476         trailing filename, instead of using erase(const_iterator) to remove
4477         a non-final component.
4478         * testsuite/27_io/filesystem/path/generation/normal.cc: Test
4479         additional cases.
4480         * testsuite/27_io/filesystem/path/generation/normal2.cc: New test.
4481
4482         * src/filesystem/std-path.cc (path::operator+=(const path&)): Fix
4483         incorrect treatment of empty filename after trailing slash.
4484         * testsuite/27_io/filesystem/path/concat/path.cc: Test problem case.
4485
4486         * testsuite/21_strings/basic_string/modifiers/assign/char/
4487         move_assign_optim.cc: Avoid spurious failure when -fno-inline added
4488         to test flags.
4489         * testsuite/21_strings/basic_string/modifiers/assign/wchar_t/
4490         move_assign_optim.cc: Likewise.
4491
4492 2019-01-03  Jonathan Wakely  <jwakely@redhat.com>
4493             Jakub Jelinek  <jakub@redhat.com>
4494
4495         PR libstdc++/88607
4496         * include/experimental/memory: Replace UTF-8 quote characters.
4497         * include/std/future: Replace UTF-8 "em dash" characters.
4498
4499 2019-01-03  Jonathan Wakely  <jwakely@redhat.com>
4500
4501         PR libstdc++/88607
4502         * include/bits/forward_list.h: Replace UTF-8 "ligature fi" character.
4503         * include/debug/forward_list: Likewise.
4504         * include/experimental/bits/shared_ptr.h: Remove UTF-8 "section sign"
4505         character.
4506         * include/experimental/chrono: Likewise.
4507         * include/experimental/functional: Likewise.
4508         * include/experimental/ratio: Likewise.
4509         * include/experimental/system_error: Likewise.
4510         * include/experimental/tuple: Likewise.
4511         * include/experimental/type_traits: Likewise.
4512         * include/parallel/workstealing.h: Replace UTF-8 "en dash" character.
4513         * include/parallel/multiseq_selection.h: Likewise.
4514
4515         PR libstdc++/88681
4516         * config/abi/pre/gnu.ver: Add missing exports.
4517         * testsuite/22_locale/collate_byname/88681.cc: New test.
4518         * testsuite/22_locale/time_get/get/char/88681.cc: New test.
4519         * testsuite/22_locale/time_get/get/wchar_t/88681.cc: New test.
4520
4521 2019-01-02  Jonathan Wakely  <jwakely@redhat.com>
4522
4523         * testsuite/23_containers/map/cons/deduction.cc: Test deduction from
4524         initializer_list<value_type> and from input iterator ranges.
4525         * testsuite/23_containers/multimap/cons/deduction.cc: Likewise.
4526
4527         * testsuite/experimental/string_view/element_access/char/empty.cc:
4528         Fix year range in copyright header.
4529
4530 2019-01-02  Joel Brobecker  <brobecker@adacore.com>
4531
4532         * testsuite/21_strings/basic_string_view/element_access/char/empty.cc:
4533         Fix year range in copyright header.
4534
4535 2019-01-01  Jakub Jelinek  <jakub@redhat.com>
4536
4537         Update copyright years.
4538 \f
4539 Copyright (C) 2019 Free Software Foundation, Inc.
4540
4541 Copying and distribution of this file, with or without modification,
4542 are permitted in any medium without royalty provided the copyright
4543 notice and this notice are preserved.