libstdc++-v3/ChangeLog

   1 2019-08-09  Corentin Gay  <gay@adacore.com>
   2
   3         * testsuite/ext/random/beta_distribution/operators/serialize.cc,
   4         testsuite/ext/random/hypergeometric_distribution/operators/serialize.cc,
   5         testsuite/ext/random/normal_mv_distribution/operators/serialize.cc,
   6         testsuite/ext/random/triangular_distribution/operators/serialize.cc,
   7         testsuite/ext/random/von_mises_distribution/operators/serialize.cc:
   8         Add call to `VERIFY`.
   9
  10 2019-08-09  Alexandre Oliva <oliva@adacore.com>
  11
  12         * include/ext/random
  13         (normal_mv_distribution::param_type::param_type): New private
  14         ctor taking a decomposed varcov matrix, for use by...
  15         (operator>>): ... this, befriended.
  16         * include/ext/random.tcc (operator>>): Use it.
  17         (normal_mv_distribution::param_type::_M_init_lower): Adjust
  18         member function name in exception message.
  19
  20 2019-08-08  Jonathan Wakely  <jwakely@redhat.com>
  21
  22         P0325R4 to_array from LFTS with updates
  23         * include/experimental/array (to_array): Qualify call to __to_array.
  24         * include/std/array (__cpp_lib_to_array, to_array): Define for C++20.
  25         * include/std/version (__cpp_lib_to_array): Likewise.
  26         * testsuite/23_containers/array/creation/1.cc: New test.
  27         * testsuite/23_containers/array/creation/2.cc: New test.
  28         * testsuite/23_containers/array/creation/3_neg.cc: New test.
  29         * testsuite/23_containers/array/tuple_interface/tuple_element_neg.cc:
  30         Use zero for dg-error line number.
  31
  32 2019-08-06  Jonathan Wakely  <jwakely@redhat.com>
  33
  34         P1651R0 bind_front should not unwrap reference_wrapper
  35         * include/std/functional (bind_front): Don't unwrap reference_wrapper.
  36         * include/std/version (__cpp_lib_bind_front): Update value.
  37         * testsuite/20_util/function_objects/bind_front/1.cc: Fix test for
  38         feature test macro.
  39         * testsuite/20_util/function_objects/bind_front/2.cc: New test.
  40
  41         * include/std/numbers [!__STRICT_ANSI__ && _GLIBCXX_USE_FLOAT128]
  42         (e_v, log2e_v, log10e_v, pi_v, inv_pi_v, inv_sqrtpi_v, ln2_v, ln10_v)
  43         (sqrt2_v, sqrt3_v, inv_sqrt3, egamma_v, phi_v): Add explicit
  44         specializations for __float128.
  45         * testsuite/26_numerics/numbers/float128.cc: New test.
  46
  47 2019-08-04  Gerald Pfeifer  <gerald@pfeifer.com>
  48
  49         * doc/xml/manual/documentation_hacking.xml: doxygen.org is now
  50         doxygen.nl.
  51
  52 2019-08-01  Edward Smith-Rowland  <3dw4rd@verizon.net>
  53
  54         Implement C++20 p0202 - Add Constexpr Modifiers to Functions
  55         in <algorithm> and <utility> Headers.
  56         Implement C++20 p1023 - constexpr comparison operators for std::array.
  57         * include/bits/algorithmfwd.h (all_of, any_of, binary_search, copy,
  58         copy_backward, copy_if, copy_n, equal_range, fill, find_end,
  59         find_if_not, includes, is_heap, is_heap_until, is_partitioned,
  60         is_permutation, is_sorted, is_sorted_until, iter_swap, lower_bound,
  61         none_of, partition_copy, partition_point, remove, remove_if,
  62         remove_copy, remove_copy_if, replace_copy, replace_copy_if,
  63         reverse_copy, rotate_copy, uunique, upper_bound, adjacent_find, count,
  64         count_if, equal, find, find_first_of, find_if, for_each, generate,
  65         generate_n, lexicographical_compare, merge, mismatch, replace,
  66         replace_if, search, search_n, set_difference, set_intersection,
  67         set_symmetric_difference, set_union, transform, unique_copy):
  68         Mark constexpr.
  69         * include/bits/cpp_type_traits.h (__miter_base): Mark constexpr.
  70         * include/bits/predefined_ops.h (_Iter_less_val::operator(),
  71         _Val_less_iter::operator(), _Iter_equal_to_iter::operator(),
  72         _Iter_equal_to_val::operator(), _Iter_equals_val::operator()):
  73          Use const ref instead of ref arg;
  74         (_Iter_less_val, __iter_less_val, _Val_less_iter, __val_less_iter,
  75         __iter_equal_to_iter, __iter_equal_to_val, __iter_comp_val,
  76         _Iter_comp_val, _Val_comp_iter, __val_comp_iter, __iter_equals_val,
  77         _Iter_equals_iter, __iter_comp_iter, _Iter_pred, __pred_iter,
  78         _Iter_comp_to_val, __iter_comp_val, _Iter_comp_to_iter,
  79         __iter_comp_iter): Mark constexpr.
  80         * include/bits/stl_algo.h (__find_if, __find_if_not, __find_if_not_n,
  81         __search, __search_n_aux, __search_n, __find_end, find_end, all_of,
  82         none_of, any_of, find_if_not, is_partitioned, partition_point,
  83         __remove_copy_if, remove_copy, remove_copy_if, copy_if, __copy_n,
  84         copy_n, partition_copy, __remove_if, remove, remove_if, __adjacent_find,
  85         __unique, unique, __unique_copy, reverse_copy, rotate_copy,
  86         __unguarded_linear_insert, __insertion_sort, __unguarded_insertion_sort,
  87         __final_insertion_sort, lower_bound, __upper_bound, upper_bound,
  88         __equal_range, equal_range, binary_search, __includes, includes,
  89         __next_permutation, __prev_permutation, __replace_copy_if, replace_copy,
  90         replace_copy_if, __count_if, is_sorted, __is_sorted_until,
  91         is_sorted_until, __is_permutation, is_permutation, for_each, find,
  92         find_if, find_first_of, adjacent_find, count, count_if, search,
  93         search_n, transform, replace, replace_if, generate, generate_n,
  94         unique_copy, __merge, merge, __set_union, set_union, __set_intersection,
  95         set_intersection, __set_difference, set_difference,
  96         __set_symmetric_difference, set_symmetric_difference):  Mark constexpr.
  97         * include/bits/stl_algobase.h (__memmove, __memcmp): New maybe constexpr
  98         wrappers around __builtin_memmove and __builtin_memcmp
  99         respectively;
 100         (__niter_base, __niter_wrap, __copy_m, __copy_move_a, __copy_move_a2,
 101         copy, move, __copy_move_b, __copy_move_backward_a,
 102         __copy_move_backward_a2, copy_backward, move_backward, __fill_a, fill,
 103         __fill_n_a, fill_n, equal, __lc_rai::__newlast1, __lc_rai::__cnd2,
 104         __lexicographical_compare_impl, __lexicographical_compare,
 105         __lexicographical_compare<true>::__lc, __lexicographical_compare_aux,
 106         __lower_bound, lower_bound, equal, __equal4, lexicographical_compare,
 107         __mismatch, mismatch, __is_heap_until, __is_heap, is_heap_until,
 108         is_heap): Mark constexpr.
 109         * include/bits/stl_heap.h (__is_heap_until, __is_heap, is_heap_until,
 110         is_heap): Mark constexpr.
 111         * include/bits/stl_iterator.h (__niter_base, __miter_base): Mark constexpr.
 112         * include/std/array: Make comparison ops constexpr.
 113         * include/std/utility: Make exchange constexpr.
 114         * include/std/version (__cpp_lib_constexpr_algorithms): New macro.
 115         * testsuite/23_containers/array/tuple_interface/get_neg.cc: Adjust.
 116         * testsuite/23_containers/array/tuple_interface/
 117         tuple_element_neg.cc: Adjust.
 118         * testsuite/20_util/exchange/constexpr.cc: New.
 119         * testsuite/23_containers/array/comparison_operators/constexpr.cc: New.
 120         * testsuite/25_algorithms/constexpr_macro.cc: New.
 121         * testsuite/25_algorithms/adjacent_find/constexpr.cc: New.
 122         * testsuite/25_algorithms/all_of/constexpr.cc: New.
 123         * testsuite/25_algorithms/any_of/constexpr.cc: New.
 124         * testsuite/25_algorithms/binary_search/constexpr.cc: New.
 125         * testsuite/25_algorithms/copy/constexpr.cc: New.
 126         * testsuite/25_algorithms/copy_backward/constexpr.cc: New.
 127         * testsuite/25_algorithms/copy_if/constexpr.cc: New.
 128         * testsuite/25_algorithms/copy_n/constexpr.cc: New.
 129         * testsuite/25_algorithms/count/constexpr.cc: New.
 130         * testsuite/25_algorithms/count_if/constexpr.cc: New.
 131         * testsuite/25_algorithms/equal/constexpr.cc: New.
 132         * testsuite/25_algorithms/equal_range/constexpr.cc: New.
 133         * testsuite/25_algorithms/fill/constexpr.cc: New.
 134         * testsuite/25_algorithms/fill_n/constexpr.cc: New.
 135         * testsuite/25_algorithms/find/constexpr.cc: New.
 136         * testsuite/25_algorithms/find_end/constexpr.cc: New.
 137         * testsuite/25_algorithms/find_first_of/constexpr.cc: New.
 138         * testsuite/25_algorithms/find_if/constexpr.cc: New.
 139         * testsuite/25_algorithms/find_if_not/constexpr.cc: New.
 140         * testsuite/25_algorithms/for_each/constexpr.cc: New.
 141         * testsuite/25_algorithms/generate/constexpr.cc: New.
 142         * testsuite/25_algorithms/generate_n/constexpr.cc: New.
 143         * testsuite/25_algorithms/is_heap/constexpr.cc: New.
 144         * testsuite/25_algorithms/is_heap_until/constexpr.cc: New.
 145         * testsuite/25_algorithms/is_partitioned/constexpr.cc: New.
 146         * testsuite/25_algorithms/is_permutation/constexpr.cc: New.
 147         * testsuite/25_algorithms/is_sorted/constexpr.cc: New.
 148         * testsuite/25_algorithms/is_sorted_until/constexpr.cc: New.
 149         * testsuite/25_algorithms/lexicographical_compare/constexpr.cc: New.
 150         * testsuite/25_algorithms/lower_bound/constexpr.cc: New.
 151         * testsuite/25_algorithms/merge/constexpr.cc: New.
 152         * testsuite/25_algorithms/mismatch/constexpr.cc: New.
 153         * testsuite/25_algorithms/none_of/constexpr.cc: New.
 154         * testsuite/25_algorithms/partition_copy/constexpr.cc: New.
 155         * testsuite/25_algorithms/partition_point/constexpr.cc: New.
 156         * testsuite/25_algorithms/remove/constexpr.cc: New.
 157         * testsuite/25_algorithms/remove_copy/constexpr.cc: New.
 158         * testsuite/25_algorithms/remove_copy_if/constexpr.cc: New.
 159         * testsuite/25_algorithms/remove_if/constexpr.cc: New.
 160         * testsuite/25_algorithms/replace_copy/constexpr.cc: New.
 161         * testsuite/25_algorithms/replace_copy_if/constexpr.cc: New.
 162         * testsuite/25_algorithms/replace_if/constexpr.cc: New.
 163         * testsuite/25_algorithms/reverse_copy/constexpr.cc: New.
 164         * testsuite/25_algorithms/rotate_copy/constexpr.cc: New.
 165         * testsuite/25_algorithms/search/constexpr.cc: New.
 166         * testsuite/25_algorithms/search_n/constexpr.cc: New.
 167         * testsuite/25_algorithms/set_difference/constexpr.cc: New.
 168         * testsuite/25_algorithms/set_intersection/constexpr.cc: New.
 169         * testsuite/25_algorithms/set_symmetric_difference/constexpr.cc: New.
 170         * testsuite/25_algorithms/set_union/constexpr.cc: New.
 171         * testsuite/25_algorithms/transform/constexpr.cc: New.
 172         * testsuite/25_algorithms/unique/constexpr.cc: New.
 173         * testsuite/25_algorithms/unique_copy/constexpr.cc: New.
 174         * testsuite/25_algorithms/upper_bound/constexpr.cc: New.
 175
 176 2019-07-31  Jonathan Wakely  <jwakely@redhat.com>
 177
 178         * include/std/memory (make_obj_using_allocator): Qualify call to
 179         uses_allocator_construction_args.
 180
 181         P0631R4 Math Constants
 182         * include/Makefile.am: Add new header.
 183         * include/Makefile.in: Regenerate.
 184         * include/precompiled/stdc++.h: Include new header.
 185         * include/std/numbers: New header.
 186         * include/std/version (__cpp_lib_math_constants): Define.
 187         * testsuite/26_numerics/numbers/1.cc: New test.
 188         * testsuite/26_numerics/numbers/2.cc: New test.
 189         * testsuite/26_numerics/numbers/3.cc: New test.
 190         * testsuite/26_numerics/numbers/nonfloat_neg.cc: New test.
 191
 192         * include/std/bit: Add Doxygen comments.
 193
 194         PR libstdc++/91308
 195         * include/bits/unique_ptr.h (unique_ptr::__safe_conversion_up): Remove
 196         constraints on deleter that should only apply to the constructor.
 197         (unique_ptr<T[], D>::__safe_conversion_up): Likewise.
 198         (unique_ptr<T[], D>::unique_ptr(unique_ptr<U, D>&&)): Restore
 199         constraints on deleter here.
 200         * testsuite/20_util/unique_ptr/assign/91308.cc: New test.
 201
 202 2019-07-29  Jonathan Wakely  <jwakely@redhat.com>
 203
 204         PR libstdc++/51333
 205         * libsupc++/cxxabi.h (__gnu_cxx::recursive_init_error): Do not define
 206         constructor inline.
 207         * libsupc++/guard_error.cc (__gnu_cxx::recursive_init_error): Define
 208         constructor.
 209         * testsuite/18_support/51333.cc: New test.
 210
 211 2019-07-28  Gerald Pfeifer  <gerald@pfeifer.com>
 212
 213         * doc/xml/manual/documentation_hacking.xml: Fix broken reference
 214         to the Doxygen manual. Avoid a "here" link on the way.
 215         Fix another broken link to Doxygen docblocks.
 216
 217 2019-07-26  Jonathan Wakely  <jwakely@redhat.com>
 218
 219         * include/std/bit (__cpp_lib_endian): Define.
 220         * include/std/version (__cpp_lib_endian): Define.
 221         * testsuite/26_numerics/endian/2.cc: New.
 222         * testsuite/26_numerics/endian/3.cc: New.
 223         * testsuite/26_numerics/endian/4.cc: New.
 224
 225 2019-07-26  François Dumont  <fdumont@gcc.gnu.org>
 226
 227         * testsuite/util/testsuite_iterators.h
 228         (bidirectional_iterator_wrapper): Fix type comment.
 229         (random_access_iterator_wrapper): Likewise.
 230
 231 2019-07-25  Jonathan Wakely  <jwakely@redhat.com>
 232
 233         * include/std/bit (endian): Move definition here as per P1612R1.
 234         * include/std/type_traits (endian): Remove definition from here.
 235         * testsuite/20_util/endian/1.cc: Rename to ...
 236         * testsuite/26_numerics/endian/1.cc: ... here. Adjust header.
 237
 238 2019-07-25  Martin Liska  <mliska@suse.cz>
 239             Dominik Infuhr  <dominik.infuehr@theobroma-systems.com>
 240
 241         PR c++/23383
 242         * testsuite/ext/bitmap_allocator/check_delete.cc: Add
 243         -fno-allocation-dce.
 244         * testsuite/ext/bitmap_allocator/check_new.cc: Likewise.
 245         * testsuite/ext/new_allocator/check_delete.cc: Likewise.
 246         * testsuite/ext/new_allocator/check_new.cc: Likewise.
 247
 248 2019-07-22  Jonathan Wakely  <jwakely@redhat.com>
 249
 250         * testsuite/26_numerics/bit/bitops.count/*: Rename to ...
 251         * testsuite/26_numerics/bit/bit.count/*: Here.
 252
 253         * include/std/bit (__rotl, __rotr): Change second parameter from
 254         unsigned int to int and handle negative values.
 255         (rotl, rotr): Remove check for __STRICT_ANSI__. Change second
 256         parameter from unsigned int to int. Add nodiscard attribute.
 257         * testsuite/26_numerics/bit/bitops.rot/rotl.cc: Rename to ...
 258         * testsuite/26_numerics/bit/bit.rotate/rotl.cc: Here. Test negative
 259         shifts.
 260         * testsuite/26_numerics/bit/bitops.rot/rotr.cc: Rename to ...
 261         * testsuite/26_numerics/bit/bit.rotate/rotr.cc: Here. Test negative
 262         shifts.
 263
 264         * include/std/bit (__ceil2): Make unrepresentable results undefined,
 265         as per P1355R2. Add debug assertion. Perform one left shift, not two,
 266         so that out of range values cause undefined behaviour. Ensure that
 267         shift will still be undefined if left operand is promoted.
 268         * testsuite/26_numerics/bit/bit.pow.two/ceil2.cc: Replace checks for
 269         unrepresentable values with checks that they are not core constant
 270         expressions.
 271         * testsuite/26_numerics/bit/bit.pow.two/ceil2_neg.cc: New test.
 272
 273 2019-07-19  François Dumont  <fdumont@gcc.gnu.org>
 274
 275         * include/bits/stl_tempbuf.h (__detail::__return_temporary_buffer): Fix
 276         sized deallocation size computation.
 277
 278 2019-07-19  Andreas Schwab  <schwab@linux-m68k.org>
 279
 280         * config/abi/post/m68k-linux-gnu/baseline_symbols.txt: Update.
 281
 282 2019-07-18  François Dumont  <fdumont@gcc.gnu.org>
 283
 284         * include/bits/stl_tempbuf.h (__detail::__return_temporary_buffer): New.
 285         (~_Temporary_buffer()): Use latter.
 286         (_Temporary_buffer(_FIterator, size_type)): Likewise.
 287
 288 2019-07-17  Andreas Schwab  <schwab@suse.de>
 289
 290         * config/abi/post/ia64-linux-gnu/baseline_symbols.txt: Update.
 291
 292 2019-07-16  Jason Merrill  <jason@redhat.com>
 293
 294         * include/std/memory (uses_allocator_construction_args): Add parens
 295         around constraint.
 296
 297 2019-07-12  Jonathan Wakely  <jwakely@redhat.com>
 298
 299         * testsuite/29_atomics/atomic_float/1.cc: Fix comment.
 300
 301         * include/experimental/string_view (__detail::__idt): Remove.
 302         (operator==, operator!=, operator<, operator>, operator<=, operator>=):
 303         Use __type_identity_t instead of __detail::__idt;
 304         * include/std/string_view (__detail::__idt): Remove.
 305         (operator==, operator!=, operator<, operator>, operator<=, operator>=):
 306         Use __type_identity_t instead of __detail::__idt;
 307         * include/std/type_traits (__type_identity_t): New alias template.
 308
 309         * doc/xml/manual/status_cxx2020.xml: Update status for atomic_ref
 310         and floating point atomics.
 311
 312 2019-07-11  Jonathan Wakely  <jwakely@redhat.com>
 313
 314         * doc/xml/manual/configure.xml: Improve documentation of
 315         --enable-libstdcxx-time option.
 316
 317         * include/bits/atomic_base.h (__atomic_impl): New namespace for
 318         wrappers around atomic built-ins.
 319         (__atomic_float, __atomic_ref): New class templates for use as base
 320         classes.
 321         * include/std/atomic (atomic<float>, atomic<double>)
 322         (atomic<long double>): New explicit specializations.
 323         (atomic_ref): New class template.
 324         (__cpp_lib_atomic_ref): Define.
 325         * include/std/version (__cpp_lib_atomic_ref): Define.
 326         * testsuite/29_atomics/atomic/60695.cc: Adjust dg-error.
 327         * testsuite/29_atomics/atomic_float/1.cc: New test.
 328         * testsuite/29_atomics/atomic_float/requirements.cc: New test.
 329         * testsuite/29_atomics/atomic_ref/deduction.cc: New test.
 330         * testsuite/29_atomics/atomic_ref/float.cc: New test.
 331         * testsuite/29_atomics/atomic_ref/generic.cc: New test.
 332         * testsuite/29_atomics/atomic_ref/integral.cc: New test.
 333         * testsuite/29_atomics/atomic_ref/pointer.cc: New test.
 334         * testsuite/29_atomics/atomic_ref/requirements.cc: New test.
 335
 336 2019-07-06  Jonathan Wakely  <jwakely@redhat.com>
 337
 338         * include/ext/atomicity.h (__exchange_and_add, __atomic_add): Replace
 339         throw() with _GLIBCXX_NOTHROW.
 340         (__atomic_add_dispatch): Return after performing atomic increment.
 341
 342 2019-07-05  Jonathan Wakely  <jwakely@redhat.com>
 343
 344         * include/ext/atomicity.h [_GLIBCXX_ATOMIC_BUILTINS] (__atomic_add)
 345         (__exchange_and_add): Replace static specifier with always_inline
 346         attribute.
 347         (__exchange_and_add_single, __atomic_add_single): Likewise.
 348         (__exchange_and_add_dispatch, __atomic_add_dispatch): Likewise. Also
 349         combine !__gthread_active_p() and !__GTHREADS branches.
 350
 351 2019-07-03  Jonathan Wakely  <jwakely@redhat.com>
 352
 353         PR libstdc++/91067
 354         * acinclude.m4 (libtool_VERSION): Bump to 6:27:0.
 355         * configure: Regenerate.
 356         * config/abi/pre/gnu.ver (GLIBCXX_3.4.27): Add new version. Export
 357         missing symbols.
 358         * testsuite/27_io/filesystem/iterators/91067.cc: New test.
 359         * testsuite/util/testsuite_abi.cc: Add new symbol version.
 360
 361 2019-07-02  Jonathan Wakely  <jwakely@redhat.com>
 362
 363         * include/bits/c++config (_GLIBCXX_HAVE_BUILTIN_LAUNDER)
 364         (_GLIBCXX_HAVE_BUILTIN_IS_CONSTANT_EVALUATED): Use __has_builtin
 365         instead of __is_identifier to detect Clang support.
 366
 367 2019-07-02  Jim Wilson  <jimw@sifive.com>
 368
 369         * configure.ac (BUILD_PDF): Also test for doxygen, dot, xsltproc,
 370         and xmllint.
 371         * configure: Regenerate.
 372
 373 2019-06-27  Jonathan Wakely  <jwakely@redhat.com>
 374
 375         PR libstdc++/91012
 376         * src/c++17/fs_path.cc (filesystem_error::_Impl): Use a string_view
 377         for the what_arg parameters.
 378         (filesystem_error::filesystem_error): Pass system_error::what() to
 379         the _Impl constructor.
 380         * testsuite/27_io/filesystem/filesystem_error/cons.cc: Ensure that
 381         filesystem_error::what() contains system_error::what().
 382
 383 2019-06-26  Jonathan Wakely  <jwakely@redhat.com>
 384
 385         * include/std/charconv (chars_format): Define bitmask type.
 386         * testsuite/20_util/to_chars/chars_format.cc: New test.
 387
 388         * include/bits/fs_path.h (path::__is_encoded_char): Use __is_one_of.
 389         * include/std/bit (_If_is_unsigned_integer_type): Remove.
 390         (_If_is_unsigned_integer): Use __is_unsigned_integer.
 391         (rotl(byte, unsigned), rotr(byte, unsigned), countl_zero(byte))
 392         (countl_one(byte), countr_zero(byte), countr_one(byte))
 393         (popcount(byte), ispow2(byte), ceil2(byte), floor2(byte))
 394         (log2p1(byte)): Remove.
 395         * include/std/charconv (__detail::__is_one_of): Move to <type_traits>.
 396         (__detail::__is_int_to_chars_type): Remove.
 397         (__detail::__integer_to_chars_result_type): Use __is_signed_integer
 398         and __is_unsigned_integer.
 399         * include/std/type_traits (__is_one_of): Move here from <charconv>.
 400         (__is_signed_integer, __is_unsigned_integer): New helpers.
 401         * testsuite/26_numerics/bit/bit.pow.two/ceil2.cc: Remove test for
 402         std::byte overload.
 403         * testsuite/26_numerics/bit/bit.pow.two/floor2.cc: Likewise.
 404         * testsuite/26_numerics/bit/bit.pow.two/ispow2.cc: Likewise.
 405         * testsuite/26_numerics/bit/bit.pow.two/log2p1.cc: Likewise.
 406         * testsuite/26_numerics/bit/bitops.count/countl_one.cc: Likewise.
 407         * testsuite/26_numerics/bit/bitops.count/countl_zero.cc: Likewise.
 408         * testsuite/26_numerics/bit/bitops.count/countr_one.cc: Likewise.
 409         * testsuite/26_numerics/bit/bitops.count/countr_zero.cc: Likewise.
 410         * testsuite/26_numerics/bit/bitops.count/popcount.cc: Likewise.
 411         * testsuite/26_numerics/bit/bitops.rot/rotl.cc: Likewise.
 412         * testsuite/26_numerics/bit/bitops.rot/rotr.cc: Likewise.
 413
 414 2019-06-25  Jonathan Wakely  <jwakely@redhat.com>
 415
 416         * include/std/numeric (midpoint(T, T)): Avoid std::abs in constexpr
 417         function.
 418
 419 2019-06-25  Jakub Jelinek  <jakub@redhat.com>
 420
 421         * include/pstl/pstl_config.h (_PSTL_PRAGMA_SIMD_SCAN,
 422         _PSTL_PRAGMA_SIMD_INCLUSIVE_SCAN, _PSTL_PRAGMA_SIMD_EXCLUSIVE_SCAN):
 423         Define to OpenMP 5.0 pragmas even for GCC 10.0+.
 424         (_PSTL_UDS_PRESENT): Define to 1 for GCC 10.0+.
 425
 426 2019-06-24  Jonathan Wakely  <jwakely@redhat.com>
 427
 428         * include/std/numeric (midpoint(T, T)): Change implementation for
 429         floating-point types to avoid incorrect rounding of denormals.
 430         * testsuite/26_numerics/midpoint/floating.cc: Add check for correct
 431         rounding with denormals.
 432         * testsuite/26_numerics/gcd/gcd_neg.cc: Adjust dg-error line numbers.
 433         * testsuite/26_numerics/lcm/lcm_neg.cc: Likewise.
 434
 435         * testsuite/18_support/headers/cfloat/values_c++17.cc: New test.
 436
 437 2019-06-20  Jonathan Wakely  <jwakely@redhat.com>
 438
 439         * acinclude.m4 (GLIBCXX_ENABLE_DEBUG): Only do debug build for final
 440         stage of bootstrap.
 441         * configure: Regenerate.
 442
 443         * include/std/variant (_Variant_storage, _Extra_visit_slot_needed):
 444         Qualify calls to __never_valueless.
 445
 446         * doc/xml/manual/status_cxx2017.xml: Fix outdated reference to
 447         C++17 working draft.
 448
 449         * testsuite/libstdc++-prettyprinters/simple.cc: Use non-palindromic
 450         vector<bool> for test.
 451         * testsuite/libstdc++-prettyprinters/simple11.cc: Likewise.
 452
 453 2019-06-19  Jonathan Wakely  <jwakely@redhat.com>
 454
 455         * include/bits/stream_iterator.h (istream_iterator::_M_equal()): Make
 456         private.
 457         (istream_iterator::_M_read()): Do not check stream state before
 458         attempting extraction. Set stream pointer to null when extraction
 459         fails (P0738R2).
 460         (operator==(const istream_iterator&, const istream_iterator&)): Change
 461         to be a hidden friend of istream_iterator.
 462         (operator!=(const istream_iterator&, const istream_iterator&)):
 463         Likewise.
 464         (ostream_iterator::ostream_iterator()): Add default constructor.
 465         (ostream_iterator::ostream_iterator(ostream_type*, const C*)): Use
 466         addressof.
 467         * testsuite/24_iterators/istream_iterator/1.cc: New test.
 468         * testsuite/24_iterators/ostream_iterator/1.cc: New test.
 469         * testsuite/24_iterators/ostream_iterator/70766.cc: Also check
 470         constructor taking a string.
 471         * testsuite/24_iterators/ostream_iterator/requirements/constexpr.cc:
 472         New test.
 473
 474 2019-06-19  Michael Weghorn  <m.weghorn@posteo.de>
 475             Jonathan Wakely  <jwakely@redhat.com>
 476
 477         PR libstdc++/90945
 478         * python/libstdcxx/v6/printers.py (StdVectorPrinter._iterator): Use
 479         values of type bool for vector<bool> elements.
 480         * testsuite/libstdc++-prettyprinters/simple.cc: Test vector<bool>.
 481         * testsuite/libstdc++-prettyprinters/simple11.cc: Likewise.
 482
 483 2019-06-19  Jonathan Wakely  <jwakely@redhat.com>
 484
 485         PR libstdc++/90920 partially revert r263433
 486         * include/bits/stl_algo.h (__rotate): Restore checks for empty ranges.
 487         (rotate): Remove checks.
 488         * testsuite/25_algorithms/rotate/90920.cc: New test.
 489
 490         * include/std/numeric (reduce(Iter, Iter, T, BinOp)): Fix value
 491         category used in invocable check.
 492         (reduce(Iter, Iter, T)): Pass initial value as rvalue.
 493         * testsuite/26_numerics/reduce/2.cc: New test.
 494
 495 2019-06-18  Jonathan Wakely  <jwakely@redhat.com>
 496
 497         * include/bits/algorithmfwd.h: Change title of doc group.
 498         * include/bits/stl_algo.h (for_each_n): Add new C++17 algorithm from
 499         P0024R2.
 500         * include/bits/stl_numeric.h: Define doc group and add algos to it.
 501         * include/std/numeric (__is_random_access_iter): New internal trait.
 502         (reduce, transform_reduce, exclusive_scan, inclusive_scan)
 503         (transform_exclusive_scan, transform_inclusive_scan): Likewise.
 504         * testsuite/25_algorithms/for_each/for_each_n.cc: New test.
 505         * testsuite/26_numerics/exclusive_scan/1.cc: New test.
 506         * testsuite/26_numerics/inclusive_scan/1.cc: New test.
 507         * testsuite/26_numerics/reduce/1.cc: New test.
 508         * testsuite/26_numerics/transform_exclusive_scan/1.cc: New test.
 509         * testsuite/26_numerics/transform_inclusive_scan/1.cc: New test.
 510         * testsuite/26_numerics/transform_reduce/1.cc: New test.
 511         * testsuite/util/testsuite_iterators.h (test_container::size()): New
 512         member function.
 513
 514         * include/c_global/cstddef (std::byte): Perform arithmetic operations
 515         in unsigned int to avoid promotion (LWG 2950).
 516
 517 2019-06-17  Jonathan Wakely  <jwakely@redhat.com>
 518
 519         * testsuite/20_util/allocator/1.cc: Add sized delete, which fixes a
 520         failure on AIX.
 521
 522         * include/c_global/cmath (__lerp, lerp): Add noexcept (LWG 3201).
 523
 524         PR libstdc++/90281 Fix string conversions for filesystem::path
 525         * include/bits/fs_path.h (u8path) [_GLIBCXX_FILESYSTEM_IS_WINDOWS]:
 526         Use codecvt_utf8_utf16 instead of codecvt_utf8. Use
 527         __str_codecvt_in_all to fail for partial conversions and throw on
 528         error.
 529         [!_GLIBCXX_FILESYSTEM_IS_WINDOWS && _GLIBCXX_USE_CHAR8_T]
 530         (path::_Cvt<char8_t>): Add explicit specialization.
 531         [_GLIBCXX_FILESYSTEM_IS_WINDOWS] (path::_Cvt::_S_wconvert): Remove
 532         overloads.
 533         [_GLIBCXX_FILESYSTEM_IS_WINDOWS] (path::_Cvt::_S_convert): Use
 534         if-constexpr instead of dispatching to _S_wconvert. Use codecvt
 535         instead of codecvt_utf8. Use __str_codecvt_in_all and
 536         __str_codecvt_out_all.
 537         [!_GLIBCXX_FILESYSTEM_IS_WINDOWS] (path::_Cvt::_S_convert): Use
 538         codecvt instead of codecvt_utf8. Use __str_codecvt_out_all.
 539         (path::_S_str_convert) [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Use
 540         codecvt_utf8_utf16 instead of codecvt_utf8. Construct return values
 541         with allocator. Use __str_codecvt_out_all. Fallthrough to POSIX code
 542         after converting to UTF-8.
 543         (path::_S_str_convert): Use codecvt instead of codecvt_utf8. Use
 544         __str_codecvt_in_all.
 545         (path::string): Fix initialization of string types with different
 546         allocators.
 547         (path::u8string) [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Use
 548         codecvt_utf8_utf16 instead of codecvt_utf8. Use __str_codecvt_out_all.
 549         * include/bits/locale_conv.h (__do_str_codecvt): Reorder static and
 550         runtime conditions.
 551         (__str_codecvt_out_all, __str_codecvt_in_all): New functions that
 552         return false for partial conversions.
 553         * include/experimental/bits/fs_path.h (u8path):
 554         [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Implement correctly for mingw.
 555         [_GLIBCXX_FILESYSTEM_IS_WINDOWS] (path::_Cvt::_S_wconvert): Add
 556         missing handling for char8_t. Use codecvt and codecvt_utf8_utf16
 557         instead of codecvt_utf8. Use __str_codecvt_in_all and
 558         __str_codecvt_out_all.
 559         [!_GLIBCXX_FILESYSTEM_IS_WINDOWS] (path::_Cvt::_S_convert): Use
 560         codecvt instead of codecvt_utf8. Use __str_codecvt_out_all.
 561         (path::string) [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Use
 562         codecvt_utf8_utf16 instead of codecvt_utf8. Construct return values
 563         with allocator. Use __str_codecvt_out_all and __str_codecvt_in_all.
 564         (path::string) [!_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Use
 565         __str_codecvt_in_all.
 566         (path::u8string) [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Use
 567         codecvt_utf8_utf16 instead of codecvt_utf8. Use __str_codecvt_out_all.
 568         * src/c++17/fs_path.cc (path::_S_convert_loc): Use
 569         __str_codecvt_in_all.
 570         * src/filesystem/path.cc (path::_S_convert_loc): Likewise.
 571         * testsuite/27_io/filesystem/path/construct/90281.cc: New test.
 572         * testsuite/27_io/filesystem/path/factory/u8path.cc: New test.
 573         * testsuite/27_io/filesystem/path/native/string.cc: Test with empty
 574         strings and with Unicode characters outside the basic multilingual
 575         plane.
 576         * testsuite/27_io/filesystem/path/native/alloc.cc: New test.
 577         * testsuite/experimental/filesystem/path/construct/90281.cc: New test.
 578         * testsuite/experimental/filesystem/path/factory/u8path.cc: New test.
 579         * testsuite/experimental/filesystem/path/native/alloc.cc: New test.
 580         * testsuite/experimental/filesystem/path/native/string.cc: Test with
 581         empty strings and with Unicode characters outside the basic
 582         multilingual plane.
 583
 584 2019-06-17  François Dumont  <fdumont@gcc.gnu.org>
 585             Jonathan Wakely  <jwakely@redhat.com>
 586
 587         * include/bits/hashtable.h (struct _Hashtable::_Scoped_node): New type.
 588         (_Hashtable::_M_insert_unique_node): Add key_type parameter. Don't
 589         deallocate node if insertion fails.
 590         (_Hashtable::_M_insert_multi_node): Likewise.
 591         (_Hashtable::_M_reinsert_node): Pass additional key argument.
 592         (_Hashtable::_M_reinsert_node_multi): Likewise. Remove FIXME.
 593         (_Hashtable::_M_extract_node(size_t, __node_base*)): New function.
 594         (_Hashtable::extract(const_iterator)): Use _M_extract_node.
 595         (_Hashtable::extract(const _Key&)): Likewise.
 596         (_Hashtable::_M_merge_unique): Pass additional key argument.
 597         (_Hashtable::_M_emplace<Args>(true_type, Args&&...)): Likewise. Use
 598         _Scoped_node.
 599         (_Hashtable::_M_insert): Likewise.
 600         * include/bits/hashtable_policy.h (_Map_base::operator[]): Likewise.
 601         (_Hashtable_alloc): Add comments to functions with misleading names.
 602
 603 2019-06-17  Jonathan Wakely  <jwakely@redhat.com>
 604
 605         * testsuite/20_util/bad_function_call/what.cc: Include <string> header
 606         for std::string.
 607         * testsuite/20_util/shared_ptr/cons/weak_ptr_expired.cc: Likewise.
 608         * testsuite/20_util/tuple/cons/allocator_with_any.cc: Include <memory>
 609         header for std::allocator.
 610         * testsuite/23_containers/array/tuple_interface/tuple_element.cc: Add
 611         using-declaration for std::size_t.
 612         * testsuite/23_containers/array/tuple_interface/tuple_size.cc:
 613         Likewise.
 614         * testsuite/23_containers/deque/cons/55977.cc: Include <istream> for
 615         std::istream.
 616         * testsuite/23_containers/vector/cons/55977.cc: Likewise.
 617         * testsuite/experimental/map/erasure.cc: Include <string> for
 618         std::string.
 619         * testsuite/experimental/unordered_map/erasure.cc: Likewise.
 620
 621 2019-06-14  Jonathan Wakely  <jwakely@redhat.com>
 622
 623         * include/experimental/type_traits (experimental::nonesuch): Use
 624         pragma to disable -Wctor-dtor-privacy warnings.
 625         * include/std/type_traits (__is_convertible_helper<From, To, false>)
 626         (__is_nt_convertible_helper<From, To, false>, __nonesuch): Likewise.
 627
 628         * include/std/version (__cpp_lib_bind_front): Add missing macro.
 629
 630 2019-06-12  Jonathan Wakely  <jwakely@redhat.com>
 631
 632         * include/std/algorithm (__cpp_lib_parallel_algorithm): Fix value.
 633         * include/std/memory (__cpp_lib_parallel_algorithm): Likewise.
 634         * include/std/numeric (__cpp_lib_parallel_algorithm): Likewise.
 635         * testsuite/25_algorithms/pstl/feature_test.cc: New test.
 636
 637         * include/std/variant (get<T>, get<N>, get_if<N>, get_if<T>)
 638         (variant::emplace): Change static_assert messages from "should be"
 639         to "must be".
 640         (hash<monostate>::operator()): Remove name of unused parameter.
 641
 642         * include/std/mutex (scoped_lock::~scoped_lock()): Use fold
 643         expression.
 644
 645         * include/Makefile.am: Add new <bits/charconv.h> header.
 646         * include/Makefile.in: Regenerate.
 647         * include/bits/basic_string.h (to_string(int), to_string(unsigned))
 648         (to_string(long), to_string(unsigned long), to_string(long long))
 649         (to_string(unsigned long long)): Rewrite to use __to_chars_10_impl.
 650         * include/bits/charconv.h: New header.
 651         (__detail::__to_chars_len): Move here from <charconv>.
 652         (__detail::__to_chars_10_impl): New function extracted from
 653         __detail::__to_chars_10.
 654         * include/std/charconv (__cpp_lib_to_chars): Add, but comment out.
 655         (__to_chars_unsigned_type): New class template that reuses
 656         __make_unsigned_selector_base::__select to pick a type.
 657         (__unsigned_least_t): Redefine as __to_chars_unsigned_type<T>::type.
 658         (__detail::__to_chars_len): Move to new header.
 659         (__detail::__to_chars_10): Add inline specifier. Move code doing the
 660         output to __detail::__to_chars_10_impl and call that.
 661         * include/std/version (__cpp_lib_to_chars): Add, but comment out.
 662         * testsuite/21_strings/basic_string/numeric_conversions/char/
 663         to_string.cc: Fix reference in comment. Remove unused variable.
 664         * testsuite/21_strings/basic_string/numeric_conversions/char/
 665         to_string_int.cc: New test.
 666
 667 2019-06-09  Edward Smith-Rowland  <3dw4rd@verizon.net>
 668
 669         Fix ConstexprIterator requirements tests - No constexpr algorithms!
 670         * testsuite/21_strings/basic_string_view/requirements/constexpr_iter.cc:
 671         Replace copy with hand-rolled loop.
 672         * testsuite/23_containers/array/requirements/constexpr_iter.cc:
 673         Ditto.
 674
 675 2019-06-08  Edward Smith-Rowland  <3dw4rd@verizon.net>
 676
 677         Test for C++20 p0858 - ConstexprIterator requirements.
 678         * testsuite/21_strings/basic_string_view/requirements/constexpr_iter.cc:
 679         New test.
 680         * testsuite/23_containers/array/requirements/constexpr_iter.cc:
 681         New test.
 682
 683 2019-06-07  Thomas Rodgers  <trodgers@redhat.com>
 684
 685         Rename PSTL macro's consistent with libstdc++ (and llvm upstream
 686         project) standards.
 687         * include/bits/c++config: Rename all macros of the form __PSTL* to
 688         _PSTL*.
 689         * include/std/algorithm: Likewise.
 690         * include/std/execution: Likewise.
 691         * include/std/numeric: Likewise.
 692         * include/std/memory: Likewise.
 693         * include/pstl/glue_memory_impl.h: Likewise.
 694         * include/pstl/numeric_impl.h: Likewise.
 695         * include/pstl/glue_memory_defs.h: Likewise.
 696         * include/pstl/execution_defs.h: Likewise.
 697         * include/pstl/utils.h: Likewise.
 698         * include/pstl/algorithm_fwd.h: Likewise.
 699         * include/pstl/unseq_backend_simd.h: Likewise.
 700         * include/pstl/glue_execution_defs.h: Likewise.
 701         * include/pstl/algorithm_impl.h: Likewise.
 702         * include/pstl/parallel_impl.h: Likewise.
 703         * include/pstl/memory_impl.h: Likewise.
 704         * include/pstl/glue_numeric_defs.h: Likewise.
 705         * include/pstl/parallel_backend_utils.h: Likewise.
 706         * include/pstl/glue_algorithm_defs.h: Likewise.
 707         * include/pstl/parallel_backend.h: Likewise.
 708         * include/pstl/glue_numeric_impl.h: Likewise.
 709         * include/pstl/parallel_backend_tbb.h: Likewise.
 710         * include/pstl/numeric_fwd.h: Likewise.
 711         * include/pstl/glue_algorithm_impl.h: Likewise.
 712         * include/pstl/execution_impl.h: Likewise.
 713         * include/pstl/pstl_config.h: Likewise.
 714         * testsuite/util/pstl/pstl_test_config.h: Likewise.
 715         * testsuite/util/pstl/test_utils.h: Likewise.
 716         * testsuite/20_util/specialized_algorithms/pstl/uninitialized_construct.cc:
 717         Likewise.
 718         * testsuite/20_util/specialized_algorithms/pstl/uninitialized_copy_move.cc:
 719         Likewise.
 720         * testsuite/26_numerics/pstl/numeric_ops/adjacent_difference.cc:
 721         Likewise.
 722         * testsuite/26_numerics/pstl/numeric_ops/scan.cc: Likewise.
 723         * testsuite/26_numerics/pstl/numeric_ops/transform_scan.cc: Likewise.
 724         * testsuite/26_numerics/pstl/numeric_ops/reduce.cc: Likewise.
 725         * testsuite/25_algorithms/pstl/alg_nonmodifying/reverse.cc: Likewise.
 726         * testsuite/25_algorithms/pstl/alg_nonmodifying/nth_element.cc:
 727         Likewise.
 728         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_end.cc: Likewise.
 729         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_if.cc: Likewise.
 730         * testsuite/25_algorithms/pstl/alg_nonmodifying/none_of.cc: Likewise.
 731         * testsuite/25_algorithms/pstl/alg_nonmodifying/count.cc: Likewise.
 732         * testsuite/25_algorithms/pstl/alg_nonmodifying/reverse_copy.cc:
 733         Likewise.
 734         * testsuite/25_algorithms/pstl/alg_nonmodifying/equal.cc: Likewise.
 735         * testsuite/25_algorithms/pstl/alg_nonmodifying/search_n.cc: Likewise.
 736         * testsuite/25_algorithms/pstl/alg_nonmodifying/find.cc: Likewise.
 737         * testsuite/25_algorithms/pstl/alg_nonmodifying/all_of.cc: Likewise.
 738         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_first_of.cc:
 739         Likewise.
 740         * testsuite/25_algorithms/pstl/alg_sorting/is_heap.cc: Likewise.
 741         * testsuite/25_algorithms/pstl/alg_sorting/partial_sort.cc: Likewise.
 742         * testsuite/25_algorithms/pstl/alg_sorting/partial_sort_copy.cc:
 743         Likewise.
 744         * testsuite/25_algorithms/pstl/alg_sorting/lexicographical_compare.cc:
 745         Likewise.
 746         * testsuite/25_algorithms/pstl/alg_merge/inplace_merge.cc: Likewise.
 747         * testsuite/25_algorithms/pstl/alg_merge/merge.cc: Likewise.
 748         * testsuite/25_algorithms/pstl/alg_modifying_operations/unique_copy_equal.cc:
 749         Likewise.
 750         * testsuite/25_algorithms/pstl/alg_modifying_operations/replace_copy.cc:
 751         Likewise.
 752         * testsuite/25_algorithms/pstl/alg_modifying_operations/is_partitioned.cc:
 753         Likewise.
 754         * testsuite/25_algorithms/pstl/alg_modifying_operations/rotate_copy.cc:
 755         Likewise.
 756         * testsuite/25_algorithms/pstl/alg_modifying_operations/remove.cc:
 757         Likewise.
 758         * testsuite/25_algorithms/pstl/alg_modifying_operations/copy_if.cc:
 759         Likewise.
 760         * testsuite/25_algorithms/pstl/alg_modifying_operations/partition_copy.cc:
 761         Likewise.
 762         * testsuite/25_algorithms/pstl/alg_modifying_operations/partition.cc:
 763         Likewise.
 764         * testsuite/25_algorithms/pstl/alg_modifying_operations/copy_move.cc:
 765         Likewise.
 766         * testsuite/25_algorithms/pstl/alg_modifying_operations/unique.cc:
 767         Likewise.
 768         * testsuite/25_algorithms/pstl/alg_modifying_operations/rotate.cc:
 769         Likewise.
 770         * testsuite/25_algorithms/pstl/alg_nonmodifying/any_of.cc: Likewise.
 771
 772         Rename header guards to be consistent with upstream project's
 773         conventions.
 774         * include/pstl/glue_memory_impl.h: Rename all macros of the form
 775         _PSTL_(.*)_H to _PSTL_\U\1_H.
 776         * include/pstl/numeric_impl.h: Likewise.
 777         * include/pstl/glue_memory_defs.h: Likewise.
 778         * include/pstl/execution_defs.h: Likewise.
 779         * include/pstl/utils.h: Likewise.
 780         * include/pstl/algorithm_fwd.h: Likewise.
 781         * include/pstl/unseq_backend_simd.h: Likewise.
 782         * include/pstl/glue_execution_defs.h: Likewise.
 783         * include/pstl/algorithm_impl.h: Likewise.
 784         * include/pstl/parallel_impl.h: Likewise.
 785         * include/pstl/memory_impl.h: Likewise.
 786         * include/pstl/glue_numeric_defs.h: Likewise.
 787         * include/pstl/parallel_backend_utils.h: Likewise.
 788         * include/pstl/glue_algorithm_defs.h: Likewise.
 789         * include/pstl/parallel_backend.h: Likewise.
 790         * include/pstl/glue_numeric_impl.h: Likewise.
 791         * include/pstl/parallel_backend_tbb.h: Likewise.
 792         * include/pstl/numeric_fwd.h: Likewise.
 793         * include/pstl/glue_algorithm_impl.h: Likewise.
 794         * include/pstl/execution_impl.h: Likewise.
 795         * include/pstl/pstl_config.h: Likewise.
 796         * testsuite/util/pstl/pstl_test_config.h: Likewise.
 797
 798         Synchronize libstdc++ parallel algorithms with upstream
 799         project.
 800         * include/pstl/algorithm_fwd.h: Synchronize with
 801         upstream PSTL project.
 802         * include/pstl/algorithm_impl.h: Likewise.
 803         * include/pstl/execution_defs.h: Likewise.
 804         * include/pstl/execution_impl.h: Likewise.
 805         * include/pstl/glue_algorithm_impl.h: Likewise.
 806         * include/pstl/glue_execution_defs.h: Likewise.
 807         * include/pstl/numeric_fwd.h: Likewise.
 808         * include/pstl/numeric_impl.h: Likewise.
 809         * include/pstl/parallel_backend.h: Likewise.
 810         * include/pstl/pstl_config.h: Likewise.
 811         * include/pstl/unseq_backend_simd.h: Likewise.
 812         * include/pstl/parallel_backend_serial.h: New file.
 813         * include/Makefile.am (pstl_headers): Add
 814         parallel_backend_serial.h.
 815         * include/Makefile.in: Regenerate.
 816
 817         Clean up non-conforming names
 818         * include/pstl/algorithm_impl.h (__parallel_set_union_op):
 819         Uglfiy copy_range1 and copy_range2
 820         (__pattern_walk2_n): Rename local n to __n
 821         * include/pstl/parallel_backend_tbb.h (struct __binary_no_op):
 822         Rename parameter _T to _Tp.
 823
 824         Integrate non-TBB serial backend support
 825         * include/bits/c++config: Adjust TBB detection logic to select serial
 826         PSTL backend if no TBB present.
 827         * testsuite/utils/pstl/test_utils.h: Remove check for
 828         _PSTL_USE_PAR_POLICIES
 829
 830 2019-06-07  Jonathan Wakely  <jwakely@redhat.com>
 831
 832         * testsuite/24_iterators/container_access.cc: Move dg-options before
 833         dg-do directive so the target check uses the -std option.
 834
 835         PR libstdc++/90770
 836         * configure: Regenerate.
 837         * src/Makefile.am (stamp-debug): Also test for missing makefile.
 838         * src/Makefile.in: Regenerate.
 839
 840 2019-06-06  Jonathan Wakely  <jwakely@redhat.com>
 841
 842         * include/std/array: Do not include <stdexcept>.
 843         * include/std/optional: Include <exception> and
 844         <bits/exception_defines.h> instead of <stdexcept>.
 845         * testsuite/20_util/function_objects/searchers.cc: Include <cctype>
 846         for std::isalnum.
 847         * testsuite/20_util/tuple/cons/deduction.cc: Include <memory> for
 848         std::allocator.
 849         * testsuite/23_containers/map/erasure.cc: Include <string>.
 850         * testsuite/23_containers/unordered_map/erasure.cc: Likewise.
 851
 852         * testsuite/23_containers/deque/requirements/dr438/assign_neg.cc: Add
 853         dg-prune-output for different C++98 diagnostic.
 854         * testsuite/23_containers/deque/requirements/dr438/constructor_1_neg.cc:
 855         Likewise.
 856         * testsuite/23_containers/deque/requirements/dr438/constructor_2_neg.cc:
 857         Likewise.
 858         * testsuite/23_containers/deque/requirements/dr438/insert_neg.cc:
 859         Likewise.
 860         * testsuite/23_containers/list/requirements/dr438/assign_neg.cc:
 861         Likewise.
 862         * testsuite/23_containers/list/requirements/dr438/constructor_1_neg.cc:
 863         Likewise.
 864         * testsuite/23_containers/list/requirements/dr438/constructor_2_neg.cc:
 865         Likewise.
 866         * testsuite/23_containers/list/requirements/dr438/insert_neg.cc:
 867         Likewise.
 868         * testsuite/23_containers/vector/requirements/dr438/assign_neg.cc:
 869         Likewise.
 870         * testsuite/23_containers/vector/requirements/dr438/
 871         constructor_1_neg.cc: Likewise.
 872         * testsuite/23_containers/vector/requirements/dr438/
 873         constructor_2_neg.cc: Likewise.
 874         * testsuite/23_containers/vector/requirements/dr438/insert_neg.cc:
 875         Likewise.
 876         * testsuite/libstdc++-prettyprinters/compat.cc: Do not run for C++98.
 877
 878         * testsuite/23_containers/unordered_map/requirements/debug_container.cc:
 879         Do not test allocator rebinding extension for C++2a.
 880         * testsuite/23_containers/unordered_set/allocator/ext_ptr.cc: Change
 881         dg-do directive for C++17 and C++2a.
 882
 883         * testsuite/23_containers/deque/requirements/explicit_instantiation/
 884         1_c++0x.cc: Remove redundant test.
 885         * testsuite/23_containers/deque/requirements/explicit_instantiation/
 886         2.cc: Use target selector instead of preprocessor condition.
 887         * testsuite/23_containers/deque/requirements/explicit_instantiation/
 888         3.cc: Do not run test for C++2a.
 889         * testsuite/23_containers/forward_list/requirements/
 890         explicit_instantiation/3.cc: Likewise.
 891         * testsuite/23_containers/forward_list/requirements/
 892         explicit_instantiation/5.cc: Do not test allocator rebinding extension
 893         for C++2a.
 894         * testsuite/23_containers/list/requirements/explicit_instantiation/
 895         1_c++0x.cc: Remove redundant test.
 896         * testsuite/23_containers/list/requirements/explicit_instantiation/
 897         2.cc: Use target selector instead of preprocessor condition.
 898         * testsuite/23_containers/list/requirements/explicit_instantiation/
 899         3.cc: Do not run test for C++2a.
 900         * testsuite/23_containers/list/requirements/explicit_instantiation/
 901         5.cc: Do not test allocator rebinding extension for C++2a.
 902         * testsuite/23_containers/map/requirements/explicit_instantiation/
 903         1_c++0x.cc: Remove redundant test.
 904         * testsuite/23_containers/map/requirements/explicit_instantiation/
 905         2.cc: Adjust comment.
 906         * testsuite/23_containers/map/requirements/explicit_instantiation/
 907         3.cc: Do not run test for C++2a.
 908         * testsuite/23_containers/map/requirements/explicit_instantiation/
 909         5.cc: Do not test allocator rebinding extension for C++2a.
 910         * testsuite/23_containers/multimap/requirements/explicit_instantiation/
 911         1_c++0x.cc: Remove redundant test.
 912         * testsuite/23_containers/multimap/requirements/explicit_instantiation/
 913         3.cc: Do not run test for C++2a.
 914         * testsuite/23_containers/multimap/requirements/explicit_instantiation/
 915         5.cc: Do not test allocator rebinding extension for C++2a.
 916         * testsuite/23_containers/multiset/requirements/explicit_instantiation/
 917         3.cc: Do not run test for C++2a.
 918         * testsuite/23_containers/multiset/requirements/explicit_instantiation/
 919         5.cc: Do not test allocator rebinding extension for C++2a.
 920         * testsuite/23_containers/set/requirements/explicit_instantiation/3.cc:
 921         Do not run test for C++2a.
 922         * testsuite/23_containers/set/requirements/explicit_instantiation/
 923         1_c++0x.cc: Remove redundant test.
 924         * testsuite/23_containers/set/requirements/explicit_instantiation/5.cc:
 925         Do not test allocator rebinding extension for C++2a.
 926         * testsuite/23_containers/unordered_map/requirements/
 927         explicit_instantiation/3.cc: Likewise.
 928         * testsuite/23_containers/unordered_map/requirements/
 929         explicit_instantiation/5.cc: Do not test allocator rebinding extension
 930         for C++2a.
 931         * testsuite/23_containers/unordered_multimap/requirements/
 932         explicit_instantiation/3.cc: Do not run test for C++2a.
 933         * testsuite/23_containers/unordered_multimap/requirements/
 934         explicit_instantiation/5.cc: Do not test allocator rebinding extension
 935         for C++2a.
 936         * testsuite/23_containers/unordered_multiset/requirements/
 937         explicit_instantiation/3.cc: Do not run test for C++2a.
 938         * testsuite/23_containers/unordered_multiset/requirements/
 939         explicit_instantiation/5.cc: Do not test allocator rebinding extension
 940         for C++2a.
 941         * testsuite/23_containers/unordered_set/requirements/
 942         explicit_instantiation/3.cc: Do not run test for C++2a.
 943         * testsuite/23_containers/unordered_set/requirements/
 944         explicit_instantiation/5.cc: Do not test allocator rebinding extension
 945         for C++2a.
 946         * testsuite/23_containers/vector/ext_pointer/explicit_instantiation/
 947         2.cc: Remove redundant test.
 948         * testsuite/23_containers/vector/ext_pointer/explicit_instantiation/
 949         3.cc: Do not run test for C++2a.
 950         * testsuite/23_containers/vector/requirements/explicit_instantiation/
 951         3.cc: Likewise.
 952
 953         * include/std/type_traits (is_empty, is_polymorphic, is_final)
 954         (is_abstract, is_aggregate): Remove static_assert.
 955         * testsuite/20_util/is_abstract/incomplete_neg.cc: Check for error
 956         from builtin only.
 957         * testsuite/20_util/is_aggregate/incomplete_neg.cc: Likewise. Add
 958         missing -std=gnu++17 option.
 959         * testsuite/20_util/is_empty/incomplete_neg.cc: New test.
 960         * testsuite/20_util/is_final/incomplete_neg.cc: New test.
 961         * testsuite/20_util/is_polymorphic/incomplete_neg.cc: Check for error
 962         from builtin only.
 963
 964         * testsuite/18_support/set_terminate.cc: Do not run for C++98 mode.
 965         * testsuite/18_support/set_unexpected.cc: Likewise.
 966         * testsuite/20_util/is_nothrow_invocable/value.cc: Test converting to
 967         void.
 968         * testsuite/20_util/is_nothrow_invocable/value_ext.cc: Fix constexpr
 969         function to be valid in C++11.
 970         * testsuite/26_numerics/complex/proj.cc: Do not run for C++98 mode.
 971         * testsuite/experimental/names.cc: Do not run for C++98 mode. Do not
 972         include Library Fundamentals or Networking headers in C++11 mode.
 973         * testsuite/ext/char8_t/atomic-1.cc: Do not run for C++98 mode.
 974
 975         * include/std/tuple (_TC): Replace with _TupleConstraints.
 976         (_TupleConstraints): New helper for SFINAE constraints, with more
 977         expressive member functions to reduce duplication when used.
 978         (tuple::_TC2, tuple::_TMC, tuple::_TNTC): Remove.
 979         (tuple::_TCC): Replace dummy type parameter with bool non-type
 980         parameter that can be used to check the pack size.
 981         (tuple::_ImplicitDefaultCtor, tuple::_ExplicitDefaultCtor)
 982         (tuple::_ImplicitCtor, tuple::_ExplicitCtor): New alias templates for
 983         checking constraints in constructors.
 984         (tuple::__valid_args, tuple::_UseOtherCtor, tuple::__use_other_ctor):
 985         New SFINAE helpers.
 986         (tuple::tuple): Use new helpers to reduce repitition in constraints.
 987         (tuple::tuple(allocator_arg_t, const Alloc&)): Constrain.
 988         (tuple<T1, T2>::_TCC, tuple<T1, T2>::_ImplicitDefaultCtor)
 989         (tuple<T1, T2>::_ExplicitDefaultCtor, tuple<T1, T2>::_ImplicitCtor)
 990         (tuple<T1, T2>::_ExplicitCtor): New alias templates for checking
 991         constraints in constructors.
 992         (tuple::__is_alloc_arg()): New SFINAE helpers.
 993         (tuple<T1, T2>::tuple): Use new helpers to reduce repitition in
 994         constraints.
 995         (tuple<T1, T2>::tuple(allocator_arg_t, const Alloc&)): Constrain.
 996         * testsuite/20_util/tuple/cons/90700.cc: New test.
 997         * testsuite/20_util/tuple/cons/allocators.cc: Add default constructor
 998         to meet new constraint on allocator-extended default constructor.
 999
1000 2019-06-03  Jonathan Wakely  <jwakely@redhat.com>
1001
1002         * include/bits/stl_map.h (map): Disable static assert for C++98 mode.
1003         * include/bits/stl_multimap.h (multimap): Likewise.
1004
1005 2019-06-03  François Dumont  <fdumont@gcc.gnu.org>
1006
1007         Rename variables and cleanup comments.
1008         * include/bits/hashtable_policy.h
1009         * include/bits/hashtable.h
1010
1011 2019-06-03  Jonathan Wakely  <jwakely@redhat.com>
1012
1013         * doc/xml/manual/status_cxx2020.xml: Add missing row for P0920R2.
1014         Fix bgcolor for P0340R3.
1015         * doc/html/*: Regenerate.
1016
1017         PR libstdc++/90686
1018         * doc/xml/manual/status_cxx2014.xml: Document what's missing from
1019         <experimental/memory_resource>.
1020         * doc/xml/manual/status_cxx2020.xml: Document status of P1285R0,
1021         P0339R6, P0340R3, P1164R1 and P1357R1.
1022         * doc/html/*: Regenerate.
1023
1024         * doc/xml/manual/status_cxx2020.xml: Document P1463R1 status.
1025         * include/bits/forward_list.h [__cplusplus > 201703]: Enable
1026         allocator::value_type assertion for C++2a.
1027         * include/bits/hashtable.h: Likewise.
1028         * include/bits/stl_deque.h: Likewise.
1029         * include/bits/stl_list.h: Likewise.
1030         * include/bits/stl_map.h: Likewise.
1031         * include/bits/stl_multimap.h: Likewise.
1032         * include/bits/stl_multiset.h: Likewise.
1033         * include/bits/stl_set.h: Likewise.
1034         * include/bits/stl_vector.h: Likewise.
1035         * testsuite/23_containers/deque/48101-3_neg.cc: New test.
1036         * testsuite/23_containers/forward_list/48101-3_neg.cc: New test.
1037         * testsuite/23_containers/list/48101-3_neg.cc: New test.
1038         * testsuite/23_containers/map/48101-3_neg.cc: New test.
1039         * testsuite/23_containers/multimap/48101-3_neg.cc: New test.
1040         * testsuite/23_containers/multiset/48101-3_neg.cc: New test.
1041         * testsuite/23_containers/set/48101-3_neg.cc: New test.
1042         * testsuite/23_containers/unordered_map/48101-3_neg.cc: New test.
1043         * testsuite/23_containers/unordered_multimap/48101-3_neg.cc: New test.
1044         * testsuite/23_containers/unordered_multiset/48101-3_neg.cc: New test.
1045         * testsuite/23_containers/unordered_set/48101-3_neg.cc: New test.
1046         * testsuite/23_containers/vector/48101-3_neg.cc: New test.
1047
1048 2019-05-31  Gerald Pfeifer  <gerald@pfeifer.com>
1049
1050         * doc/xml/manual/allocator.xml: Move hoard.org back to http.
1051
1052 2019-05-31  Jonathan Wakely  <jwakely@redhat.com>
1053
1054         * include/std/tuple (tuple<>): Add noexcept to allocator-extended
1055         constructors.
1056         (tuple<T1, T2>::__nothrow_default_constructible()): New helper
1057         function.
1058         (tuple<T1, T2>::tuple(), explicit tuple<T1, T2>::tuple()): Use helper.
1059
1060 2019-05-31  Jonathan Wakely  <jwakely@redhat.com>
1061
1062         * src/c++98/bitmap_allocator.cc: Add using-declaration for size_t.
1063
1064         PR libstdc++/90682
1065         * libsupc++/eh_term_handler.cc: Include eh_term_handler.h to get
1066         definition of _GLIBCXX_DEFAULT_TERM_HANDLER.
1067         * libsupc++/eh_term_handler.h: New header defining
1068         _GLIBCXX_DEFAULT_TERM_HANDLER.
1069         * libsupc++/eh_terminate.cc: Include eh_term_handler.h.
1070         (set_terminate): Restore default handler when argument is null.
1071         (set_unexpected): Likewise.
1072         * testsuite/18_support/set_terminate.cc: New test.
1073         * testsuite/18_support/set_unexpected.cc: New test.
1074
1075         * include/backward/hashtable.h (size_t, ptrdiff_t)
1076         (forward_iterator_tag, input_iterator_tag, _Construct, _Destroy)
1077         (distance, vector, pair, __iterator_category): Remove
1078         using-declarations that add these names to namespace __gnu_cxx.
1079         * include/ext/bitmap_allocator.h (size_t, ptrdiff_t): Likewise.
1080         * include/ext/debug_allocator.h (size_t): Likewise.
1081         * include/ext/functional (size_t, unary_function, binary_function)
1082         (mem_fun1_t, const_mem_fun1_t, mem_fun1_ref_t, const_mem_fun1_ref_t):
1083         Likewise.
1084         * include/ext/malloc_allocator.h (size_t, ptrdiff_t): Likewise.
1085         * include/ext/memory (ptrdiff_t, pair, __iterator_category): Likewise.
1086         * include/ext/mt_allocator.h (size_t, ptrdiff_t): Likewise.
1087         * include/ext/new_allocator.h (size_t, ptrdiff_t): Likewise.
1088         * include/ext/numeric (iota): Fix outdated comment.
1089         * include/ext/pool_allocator.h (size_t, ptrdiff_t): Likewise.
1090         * include/ext/rb_tree (_Rb_tree, allocator): Likewise.
1091         * include/ext/rope (size_t, ptrdiff_t, allocator, _Destroy): Likewise.
1092         * include/ext/ropeimpl.h (size_t, printf, basic_ostream)
1093         (__throw_length_error, _Destroy, std::__uninitialized_fill_n_a):
1094         Likewise.
1095         * include/ext/slist (size_t, ptrdiff_t, _Construct, _Destroy)
1096         (allocator, __true_type, __false_type): Likewise.
1097
1098 2019-05-31  Antony Polukhin  <antoshkka@gmail.com>
1099
1100         PR libstdc++/71579
1101         * include/std/type_traits __type_identity, __is_complete_or_unbounded):
1102         New helpers for checking preconditions in traits.
1103         (is_trivial, is_trivially_copyable, is_standard_layout, is_pod)
1104         (is_literal_type, is_empty, is_polymorphic, is_final, is_abstract)
1105         (is_destructible, is_nothrow_destructible, is_constructible)
1106         (is_default_constructible, is_copy_constructible)
1107         (is_move_constructible, is_nothrow_default_constructible)
1108         (is_nothrow_constructible, is_nothrow_copy_constructible)
1109         (is_nothrow_move_constructible, is_copy_assignable, is_move_assignable)
1110         (is_nothrow_assignable, is_nothrow_copy_assignable)
1111         (is_nothrow_move_assignable, is_trivially_constructible)
1112         (is_trivially_copy_constructible, is_trivially_move_constructible)
1113         is_trivially_assignable, is_trivially_copy_assignable)
1114         (is_trivially_move_assignable, is_trivially_destructible)
1115         (alignment_of, is_swappable, is_nothrow_swappable, is_invocable)
1116         (is_invocable_r, is_nothrow_invocable)
1117         (has_unique_object_representations, is_aggregate): Add static_asserts
1118         to make sure that type traits are not misused with incomplete types.
1119         (__is_constructible_impl, __is_nothrow_default_constructible_impl)
1120         (__is_nothrow_constructible_impl, __is_nothrow_assignable_impl): New
1121         base characteristics without assertions that can be reused in other
1122         traits.
1123         * testsuite/20_util/is_complete_or_unbounded/memoization.cc: New test.
1124         * testsuite/20_util/is_complete_or_unbounded/memoization_neg.cc: New
1125         test.
1126         * testsuite/20_util/is_complete_or_unbounded/value.cc: New test.
1127         * testsuite/20_util/is_abstract/incomplete_neg.cc: New test.
1128         * testsuite/20_util/is_aggregate/incomplete_neg.cc: New test.
1129         * testsuite/20_util/is_class/value.cc: Check incomplete type.
1130         * testsuite/20_util/is_function/value.cc: Likewise.
1131         * testsuite/20_util/is_move_constructible/incomplete_neg.cc: New test.
1132         * testsuite/20_util/is_nothrow_move_assignable/incomplete_neg.cc: New
1133         test.
1134         * testsuite/20_util/is_polymorphic/incomplete_neg.cc: New test.
1135         * testsuite/20_util/is_reference/value.cc: Check incomplete types.
1136         * testsuite/20_util/is_unbounded_array/value.cc: Likewise.
1137         * testsuite/20_util/is_union/value.cc: Likewise.
1138         * testsuite/20_util/is_void/value.cc: Likewise.
1139         * testsuite/util/testsuite_tr1.h: Add incomplete union type.
1140
1141 2019-05-31  Jonathan Wakely  <jwakely@redhat.com>
1142
1143         * include/bits/random.h (random_device::_M_init(const char*, size_t)):
1144         Add new private member function.
1145         * src/c++11/cow-string-inst.cc (random_device::_M_init(const string&))
1146         (random_device::_M_init_pretr1(const string&)): Call new private
1147         member with string data.
1148         * src/c++11/random.cc (random_device::_M_init(const char*, size_t)):
1149         Define.
1150         * testsuite/26_numerics/random/random_device/cons/default-cow.cc: New
1151         test using COW strings.
1152         * testsuite/26_numerics/random/random_device/cons/default.cc: Generate
1153         a value from the device.
1154         * testsuite/26_numerics/random/random_device/cons/token.cc: Likewise.
1155         Fix typo in token string.
1156
1157 2019-05-30  Nina Dinka Ranns  <dinka.ranns@gmail.com>
1158
1159         LWG2788 basic_string spurious use of a default constructible allocator
1160         * include/bits/basic_string.tcc [_GLIBCXX_USE_CXX11_ABI]
1161         (basic_string::_M_replace_dispatch): Construct temporary string with
1162         the current allocator.
1163         * testsuite/21_strings/basic_string/allocator/char/lwg2788.cc: New.
1164         * testsuite/21_strings/basic_string/allocator/wchar_t/lwg2788.cc: New.
1165
1166 2019-05-30  Jonathan Wakely  <jwakely@redhat.com>
1167
1168         * doc/xml/manual/diagnostics.xml: Update list of headers that define
1169         exception classes.
1170         * doc/xml/manual/support.xml: Rewrite advice around NULL. Rewrite
1171         section about new/delete overloads. Improve section on verbose
1172         terminate handler.
1173         * doc/html/*: Regenerate.
1174
1175         * doc/xml/manual/status_cxx2020.xml: Add feature-test macro for
1176         P0811R3. Change status of P1353R0.
1177         * doc/html/*: Regenerate.
1178
1179         * doc/xml/manual/status_cxx2011.xml: Use <variablelist> for
1180         documentation of implementation-defined types for [thread.req.native].
1181         * doc/xml/manual/status_cxx2017.xml: Update documentation of
1182         implementation-defined strings for [variant.bad.access]. Fix typo in
1183         documentation of implementation-defined support for [fs.conform.9945].
1184         * doc/html/*: Regenerate.
1185
1186 2019-05-29  Jonathan Wakely  <jwakely@redhat.com>
1187
1188         PR libstdc++/85494
1189         * testsuite/26_numerics/random/random_device/cons/token.cc: Fix test
1190         that fails on mingw-w64.
1191
1192         PR libstdc++/88881
1193         * src/c++17/fs_ops.cc [_GLIBCXX_FILESYSTEM_IS_WINDOWS]
1194         (status(const path&, error_code&)): Use parent_path() to remove
1195         trailing slash.
1196         (symlink_status(const path&, error_code&)): Duplicate workaround for
1197         bug in _wstat for paths with trailing slash.
1198         * testsuite/27_io/filesystem/operations/remove_all.cc: Check path
1199         with trailing slash.
1200         * testsuite/27_io/filesystem/operations/status.cc: Likewise.
1201         * testsuite/27_io/filesystem/operations/symlink_status.cc: Likewise.
1202
1203         * src/c++17/fs_path.cc (path::parent_path()): Create whole path at
1204         once instead of building it iteratively.
1205
1206         * testsuite/util/testsuite_api.h: Remove names of unused parameters.
1207
1208         PR libstdc++/85494 use rdseed and rand_s in std::random_device
1209         * acinclude.m4 (GLIBCXX_CHECK_X86_RDSEED): Define macro to check if
1210         the assembler supports rdseed.
1211         * config.h.in: Regenerate.
1212         * configure: Regenerate.
1213         * configure.ac: Use GLIBCXX_CHECK_X86_RDSEED.
1214         * config/os/mingw32-w64/os_defines.h (_GLIBCXX_USE_CRT_RAND_S): Define.
1215         * doc/html/*: Regenerate.
1216         * doc/xml/manual/status_cxx2011.xml: Document new tokens.
1217         * include/bits/random.h (random_device::random_device()): Always call
1218         _M_init rather than _M_init_pretr1.
1219         (random_device::random_device(const string&)): Likewise.
1220         (random_device::operator()()): Always call _M_getval().
1221         (random_device::_M_file): Replace first member of union with an
1222         anonymous struct, with _M_file as its first member.
1223         * src/c++11/random.cc [_GLIBCXX_X86_RDRAND] (USE_RDRAND): Define.
1224         [_GLIBCXX_X86_RDSEED] (USE_RDSEED): Define.
1225         (USE_MT19937): Define if none of the above are defined.
1226         (USE_POSIX_FILE_IO): Define.
1227         (_M_strtoul): Remove.
1228         [USE_RDSEED] (__x86_rdseed): Define new function.
1229         [_GLIBCXX_USE_CRT_RAND_S] (__winxp_rand_s): Define new function.
1230         (random_device::_M_init(const string&)): Initialize new union members.
1231         Add support for "rdseed" and "rand_s" tokens. Decide what the
1232         "default" token does according to which USE_* macros are defined.
1233         [USE_POSIX_FILE_IO]: Store a file descriptor.
1234         [USE_MT19937]: Forward to _M_init_pretr1 instead.
1235         (random_device::_M_init_pretr1(const string&)) [USE_MT19937]: Inline
1236         code from _M_strtoul.
1237         [!USE_MT19937]: Call _M_init, transforming the old default token or
1238         numeric tokens to "default".
1239         (random_device::_M_fini()) [USE_POSIX_FILE_IO]: Use close not fclose.
1240         (random_device::_M_getval()): Use new union members to obtain a
1241         random number from the stored function pointer or file descriptor.
1242         [USE_MT19937]: Obtain a value from the mt19937 engine.
1243         (random_device::_M_getval_pretr1()): Call _M_getval().
1244         (random_device::_M_getentropy()) [USE_POSIX_FILE_IO]: Use _M_fd
1245         instead of fileno.
1246         [!USE_MT19937] (mersenne_twister): Do not instantiate when not needed.
1247         * testsuite/26_numerics/random/random_device/85494.cc: New test.
1248
1249 2019-05-28  Jonathan Wakely  <jwakely@redhat.com>
1250
1251         PR libstdc++/90634
1252         * include/experimental/bits/fs_path.h (path::path(path&&)): Only call
1253         _M_split_cmpts() for a path with multiple components.
1254         (path::_S_is_dir_sep()): Add missing 'static' keyword to function.
1255         * src/filesystem/path.cc (path::_M_split_cmpts()): Count number of
1256         components and reserve space in vector. Return early when there is
1257         only one component.
1258         * testsuite/27_io/filesystem/path/construct/90634.cc: New test.
1259         * testsuite/experimental/filesystem/path/construct/90634.cc: New test.
1260
1261         * testsuite/util/testsuite_fs.h (compare_paths): Use three-argument
1262         form of std::equals for C++11 compatibility.
1263
1264 2019-05-26  Gerald Pfeifer  <gerald@pfeifer.com>
1265
1266         * doc/xml/manual/appendix_contributing.xml: Update pointer to
1267         C++ standard at ansi.org.
1268
1269 2019-05-24  Jonathan Wakely  <jwakely@redhat.com>
1270
1271         * include/std/numeric (midpoint(T*, T*)): Fix incorrect result.
1272         * testsuite/26_numerics/midpoint/pointer.cc: Change "compile" test
1273         to "run".
1274
1275         * testsuite/20_util/shared_ptr/cons/alias-rval.cc: Fix test.
1276         * testsuite/20_util/shared_ptr/cons/alias.cc: Remove unused function.
1277
1278 2019-05-23  Jonathan Wakely  <jwakely@redhat.com>
1279
1280         * testsuite/20_util/function_objects/invoke/1.cc: Move C++17-specific
1281         tests to ...
1282         * testsuite/20_util/function_objects/invoke/3.cc: New test.
1283         * testsuite/23_containers/unordered_set/allocator/ext_ptr.cc: Change
1284         "compile" test to "run".
1285
1286         * doc/xml/manual/intro.xml: Document LWG DR 2996 change.
1287         * doc/html/*: Regenerate.
1288         * include/bits/shared_ptr.h (shared_ptr(shared_ptr&&, T*)): Add
1289         rvalue aliasing constructor.
1290         (static_pointer_cast, const_pointer, dynamic_pointer_cast)
1291         (reinterpret_pointer_cast): Add overloads taking rvalues.
1292         * include/bits/shared_ptr_base.h (__shared_ptr(__shared_ptr&&, T*)):
1293         Add rvalue aliasing constructor.
1294         * testsuite/20_util/shared_ptr/casts/1.cc: Change "compile" test to
1295         "run" and check return values as well as types.
1296         * testsuite/20_util/shared_ptr/casts/reinterpret.cc: Likewise.
1297         * testsuite/20_util/shared_ptr/casts/rval.cc: New test.
1298         * testsuite/20_util/shared_ptr/cons/alias-rval.cc: New test.
1299         * testsuite/20_util/shared_ptr/cons/alias.cc: Remove unused return
1300         values.
1301
1302         * doc/xml/manual/evolution.xml: Document LWG DR 2921 change.
1303         * doc/xml/manual/intro.xml: Likewise.
1304         * include/std/future (__create_task_state): Add default arguments
1305         to make providing an allocator optional.
1306         (packaged_task::packaged_task(F&&)): Call __create_task_state directly
1307         instead of delegating to another constructor.
1308         (packaged_task::packaged_task(allocator_arg_t, const A&, ...)): Do not
1309         define allocator-extended constructors for C++17 and later.
1310         * testsuite/30_threads/packaged_task/cons/alloc.cc: Only run test for
1311         C++11 and C++14.
1312         * testsuite/30_threads/packaged_task/cons/alloc2.cc: Likewise.
1313         * testsuite/30_threads/packaged_task/cons/alloc_min.cc: Likewise.
1314         * testsuite/30_threads/packaged_task/uses_allocator.cc: Likewise.
1315
1316 2019-05-23  Hans-Peter Nilsson  <hp@axis.com>
1317
1318         * testsuite/26_numerics/random/poisson_distribution/operators/values.cc:
1319         Don't run the libstdc++/83237 part on simulator targets.
1320
1321 2019-05-23  Jonathan Wakely  <jwakely@redhat.com>
1322
1323         * doc/xml/manual/status_cxx2017.xml: Add feature test macro for
1324         P0040R3.
1325         * doc/html/*: Regenerate.
1326
1327         * include/experimental/any (__any_caster): Use RTTI if comparing
1328         addresses fails, to support non-unique addresses in shared libraries.
1329         * include/std/any (__any_caster): Likewise.
1330
1331         PR libstdc++/90220
1332         * include/experimental/any (__any_caster): Constrain to only be
1333         callable for object types. Use remove_cv_t instead of decay_t.
1334         If the type decays or isn't copy constructible, compare the manager
1335         function to a dummy specialization.
1336         (__any_caster): Add overload constrained for non-object types.
1337         (any::_Manager_internal<_Op>): Add dummy specialization.
1338         * testsuite/experimental/any/misc/any_cast.cc: Test function types
1339         and array types.
1340
1341 2019-05-22  Jonathan Wakely  <jwakely@redhat.com>
1342
1343         PR libstdc++/90557
1344         * src/c++17/fs_path.cc (path::_List::operator=(const _List&)): Fix
1345         reversed arguments to uninitialized_copy_n.
1346         * testsuite/27_io/filesystem/path/assign/copy.cc: Check that source
1347         is unchanged by copy assignment.
1348         * testsuite/util/testsuite_fs.h (compare_paths): Use std::equal to
1349         compare path components.
1350
1351         PR libstdc++/77691
1352         * include/experimental/memory_resource: Add system header pragma and
1353         do not define anything unless compiled as C++14 or later.
1354         (__resource_adaptor_common::__guaranteed_alignment): Remove.
1355         (__resource_adaptor_imp::do_allocate): If the requested alignment
1356         is a fundamental alignment then either allocate directly from _M_alloc
1357         or call the new _M_allocate function.
1358         (__resource_adaptor_imp::do_deallocate): Likewise for deallocation.
1359         (__resource_adaptor_imp::_M_allocate): New function that uses a copy
1360         of the allocator rebound to a POD type with the specified alignment.
1361         (__resource_adaptor_imp::_M_deallocate): Likewise for deallocation.
1362         * testsuite/experimental/memory_resource/new_delete_resource.cc:
1363         Adjust expected allocation sizes.
1364         * testsuite/experimental/memory_resource/resource_adaptor.cc: Remove
1365         xfail for Solaris x86.
1366
1367 2019-05-21  Thomas Rodgers  <trodgers@redhat.com>
1368
1369         LWG 3062 - Unnecessary decay_t in is_execution_policy_v
1370         * include/pstl/execution_defs.h (__enable_if_execution_policy):
1371         Use std::__remove_cvref_t when building with GCC.
1372
1373 2019-05-21  Jonathan Wakely  <jwakely@redhat.com>
1374
1375         PR libstdc++/90252
1376         * testsuite/lib/libstdc++.exp (check_effective_target_tbb-backend):
1377         Use "additional_flags" to pass -ltbb to v3_target_compile command.
1378         Use check_v3_target_prop_cached to cache the result of the test.
1379
1380         * doc/xml/manual/shared_ptr.xml: Fix names of lock policy constants.
1381
1382 2019-05-20  Thomas Rodgers  <trodgers@redhat.com>
1383
1384         PR libstdc++/90252
1385         * testsuite/lib/libstdc++.exp (check_effective_target_tbb-backend):
1386         Changed v3_target_compile check from preprocess to executable.
1387         Added "-ltbb" to v3_target_compile flags.
1388
1389 2019-05-20  Thomas Rodgers  <trodgers@redhat.com>
1390
1391         * testsuite/lib/libstdc++.exp (check_effective_target_tbb-backend):
1392         Add check for Thread Building Blocks 2018 or later.
1393
1394 2019-05-20  Jonathan Wakely  <jwakely@redhat.com>
1395
1396         * testsuite/experimental/names.cc: Only include Networking TS headers
1397         on targets with the necessary Gthreads support.
1398
1399 2019-05-20  Marek Polacek  <polacek@redhat.com>
1400
1401         CWG 2094 - volatile scalars are trivially copyable.
1402         PR c++/85679
1403         * testsuite/20_util/is_trivially_copyable/value.cc: Change the expected
1404         result for volatile int.
1405
1406 2019-05-20  Jonathan Wakely  <jwakely@redhat.com>
1407
1408         * testsuite/17_intro/names.cc: Do not check 'ptr' on Solaris.
1409         * testsuite/experimental/names.cc: Include <experimental/filesystem>
1410         conditionally.
1411
1412         PR c++/90532 Ensure __is_constructible(T[]) is false
1413         * include/std/type_traits (__do_is_default_constructible_impl)
1414         (__is_default_constructible_atom, __is_default_constructible_safe):
1415         Remove.
1416         (is_default_constructible): Use is_constructible.
1417         * testsuite/20_util/is_constructible/value.cc: Check int[] case.
1418         * testsuite/20_util/is_default_constructible/value.cc: Likewise.
1419         * testsuite/20_util/is_trivially_constructible/value.cc: Likewise.
1420         * testsuite/20_util/is_trivially_default_constructible/value.cc:
1421         Likewise.
1422
1423 2019-05-20  Pádraig Brady  <pbrady@fb.com>
1424
1425         * libstdc++-v3/include/ext/new_allocator.h (deallocate): Pass the size
1426         to the deallocator with -fsized-deallocation.
1427
1428 2019-05-20  Jonathan Wakely  <jwakely@redhat.com>
1429
1430         * testsuite/experimental/memory_resource/new_delete_resource.cc: Fix
1431         test by passing correct alignment to deallocate function.
1432
1433 2019-05-18  Jonathan Wakely  <jwakely@redhat.com>
1434
1435         PR libstdc++/90520
1436         * python/libstdcxx/v6/printers.py (UniquePointerPrinter.__init__):
1437         Raise exception if unique_ptr tuple member has unknown structure.
1438         * python/libstdcxx/v6/xmethods.py (UniquePtrGetWorker.__call__):
1439         Adjust worker to support new __uniq_ptr_data base class. Do not
1440         assume field called _M_head_impl is the first tuple element.
1441
1442 2019-05-17  François Dumont  <fdumont@gcc.gnu.org>
1443
1444         * include/bits/stl_deque.h
1445         (_Deque_iterator<>::__ptr_to): Remove, use std::__ptr_rebind.
1446         (_Deque_base(_Deque_base&&, const allocator_type&)): New.
1447         (_Deque_base::_Deque_impl_data): New.
1448         (_Deque_base::_Deque_impl): Inherit latter.
1449         (_Deque_base::_Deque_impl::_M_swap_data): Move...
1450         (_Deque_base::_Deque_impl_data::_M_swap_data): ... here.
1451         (_Deque_base::_Deque_impl()): Add noexcept qualification.
1452         (_Deque_base::_Deque_impl(_Deque_impl&&, _Tp_alloc_type&&)): New.
1453         (_Deque_base::_Deque_impl::_M_get_Tp_allocator()): Remove static_cast.
1454         (deque<>::deque()): Default.
1455         (deque<>::deque(deque&&)): Default.
1456         (deque<>::deque(deque&&, const allocator_type&, false_type)): New.
1457         (deque<>::deque(deque&&, const allocator_type&, true_type)): New.
1458         (deque<>::deque(deque&&, const allocator_type&)): Delegate to latters.
1459         (deque<>::deque<_It>(_It, _It, const allocator_type&)): Use
1460         _M_range_initialize.
1461         (deque<>::assign<_It>(_It, _It)): Use _M_assign_aux.
1462         (deque<>::resize(size_type, const value_type&)): Share a single
1463         implementation.
1464         (deque<>::insert<_It>(const_iterator, _It, _It)): Use
1465         _M_range_insert_aux.
1466         [__cplusplus >= 201103L](_M_initialize_dispatch): Remove.
1467         [__cplusplus >= 201103L](_M_assign_dispatch): Remove.
1468         [__cplusplus >= 201103L](_M_insert_dispatch): Remove.
1469         * testsuite/23_containers/deque/allocator/default_init.cc: New.
1470
1471 2019-05-17  Jonathan Wakely  <jwakely@redhat.com>
1472
1473         PR libstdc++/90246
1474         * include/std/variant (holds_alternative, get, get_if): Improve
1475         static assertion messages.
1476         (bad_variant_access::bad_variant_access()): Change default message.
1477         (__throw_bad_variant_access(bool)): New overload.
1478         (get): Use new overload.
1479         (visit, visit<R>): Improve exception message.
1480
1481         * testsuite/20_util/variant/compile.cc: Fix narrowing test for ILP32
1482         targets. Add more cases from P0608R3.
1483         * testsuite/20_util/variant/run.cc: Add more cases from P0608R3.
1484
1485         * include/bits/random.h (seed_seq::param): Fix non-reserved name.
1486         * include/experimental/type_traits (is_detected_exact)
1487         (is_detected_exact_v): Likewise.
1488         * include/pstl/execution_defs.h (is_execution_policy)
1489         (is_execution_policy_v, __enable_if_execution_policy): Likewise.
1490         * include/pstl/execution_impl.h (__policy_traits): Likewise.
1491         * testsuite/17_intro/names.cc: Check for more non-reserved names.
1492         * testsuite/experimental/names.cc: New test.
1493
1494         PR libstdc++/85965
1495         * include/bits/hashtable.h (_Hashtable::~_Hashtable()): Remove static
1496         assertions from the destructor.
1497         * include/bits/hashtable_policy.h (_Hash_code_base::_M_hash_code):
1498         Move static_assert for hash function to here.
1499         (_Hash_table_base::_M_equals): Move static_assert for equality
1500         predicate to here.
1501         * include/bits/stl_tree.h (_Rb_tree::_S_value(_Const_Link_type)):
1502         Remove.
1503         (_Rb_tree::_S_key(_Const_Link_type)): Move assertions here. Access
1504         the value directly instead of calling _S_value.
1505         (_Rb_tree::_S_value(_Const_Base_ptr)): Remove.
1506         (_Rb_tree::_S_key(_Const_Base_ptr)): Do downcast and forward to
1507         _S_key(_Const_Link_type).
1508         * testsuite/23_containers/set/85965.cc: Check construction,
1509         destruction, assignment and size() do not trigger the assertions.
1510         * testsuite/23_containers/unordered_set/85965.cc: Likewise.
1511         * testsuite/23_containers/map/48101_neg.cc: Call find and adjust
1512         expected errors.
1513         * testsuite/23_containers/multimap/48101_neg.cc: Likewise.
1514         * testsuite/23_containers/multiset/48101_neg.cc: Likewise.
1515         * testsuite/23_containers/set/48101_neg.cc: Likewise.
1516         * testsuite/23_containers/unordered_map/48101_neg.cc: Likewise.
1517         * testsuite/23_containers/unordered_multimap/48101_neg.cc: Likewise.
1518         * testsuite/23_containers/unordered_multiset/48101_neg.cc: Likewise.
1519         * testsuite/23_containers/unordered_set/48101_neg.cc: Likewise.
1520
1521         * include/bits/invoke.h [__cplusplus < 201703L] (__invoke_r<void>):
1522         Use _GLIBCXX14_CONSTEXPR because void functions cannot be constexpr
1523         in C++11.
1524
1525         * doc/xml/manual/status_cxx2020.xml: Update P0608R3, P0777R1, and
1526         P1165R1 entries.
1527         * doc/html/*: Regenerate.
1528         * include/std/tuple (make_from_tuple): Use remove_reference_t instead
1529         of decay_t (P0777R1).
1530
1531 2019-05-17  François Dumont  <fdumont@gcc.gnu.org>
1532
1533         Move from state of allocators (LWG2593)
1534         * include/bits/stl_deque.h
1535         (_Deque_base(_Deque_base&&, false_type)): Remove.
1536         (_Deque_base(_Deque_base&&, true_type)): Remove.
1537         (_Deque_base(_Deque_base&&)): Adapt.
1538         (_Deque_base::_M_move_impl()): Remove.
1539         * testsuite/util/testsuite_allocator.h
1540         (propagating_allocator(propagating_allocator&&)): Preserve move from
1541         state.
1542         * testsuite/23_containers/deque/allocator/move_assign.cc (test02):
1543         Adapt.
1544         * testsuite/23_containers/forward_list/allocator/move_assign.cc (test02):
1545         Adapt.
1546         * testsuite/23_containers/list/allocator/move_assign.cc (test02): Adapt.
1547         * testsuite/23_containers/map/allocator/move_assign.cc (test02): Adapt.
1548         * testsuite/23_containers/multimap/allocator/move_assign.cc (test02):
1549         Adapt.
1550         * testsuite/23_containers/multiset/allocator/move_assign.cc (test02):
1551         Adapt.
1552         * testsuite/23_containers/set/allocator/move_assign.cc (test02): Adapt.
1553         * testsuite/23_containers/unordered_map/allocator/move_assign.cc
1554         (test02): Adapt.
1555         * testsuite/23_containers/unordered_multimap/allocator/move_assign.cc
1556         (test02): Adapt.
1557         * testsuite/23_containers/unordered_multiset/allocator/move_assign.cc
1558         (test02): Adapt.
1559         * testsuite/23_containers/unordered_set/allocator/move_assign.cc
1560         (test02): Adapt.
1561         * testsuite/23_containers/vector/allocator/move_assign.cc (test02):
1562         Adapt.
1563         * testsuite/23_containers/vector/bool/allocator/move_assign.cc (test02):
1564         Adapt.
1565         * testsuite/21_strings/basic_string/allocator/char/move_assign.cc
1566         (test02): Adapt.
1567         * testsuite/21_strings/basic_string/allocator/wchar_t/move_assign.cc
1568         (test02): Adapt.
1569
1570 2019-05-16  Jonathan Wakely  <jwakely@redhat.com>
1571
1572         * src/c++17/fs_ops.cc (absolute(const path&, error_code&))
1573         [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Remove bogus assertion.
1574
1575         * include/std/variant (__overload_set): Remove.
1576         (_Arr): New helper.
1577         (_Build_FUN): New class template to define a single FUN overload,
1578         with specializations to prevent unwanted conversions, as per P0608R3.
1579         (_Build_FUNs): New class template to build an overload set of FUN.
1580         (_FUN_type): New alias template to perform overload resolution.
1581         (__accepted_type): Use integer_constant base for failure case. Use
1582         _FUN_type for successful case.
1583         (variant::__accepted_index): Use _Tp instead of _Tp&&.
1584         (variant::variant(_Tp&&)): Likewise.
1585         (variant::operator=(_Tp&&)): Likewise.
1586
1587         * include/std/variant (_Variant_storage<false, _Types...>::_M_reset):
1588         Replace raw visitation with a runtime check for the valueless state
1589         and a non-raw visitor.
1590         (_Variant_storage<false, _Types...>::_M_reset_impl): Remove.
1591         (variant::index()): Remove branch.
1592         (variant::swap(variant&)): Use valueless_by_exception() instead of
1593         comparing the index to variant_npos, and add likelihood attribute.
1594
1595         * include/bits/hashtable_policy.h (_Equal_helper): Remove.
1596         (_Hashtable_base::_Equal_hash_code): Define new class template.
1597         (_Hashtable_base::_M_equals): Use _Equal_hash_code instead of
1598         _Equal_helper.
1599
1600         * include/bits/hashtable_policy.h (_Hashtable_ebo_helper::_S_get):
1601         Replace with _M_get non-static member function.
1602         (_Hashtable_ebo_helper::_S_cget): Replace with _M_cget non-static
1603         member function.
1604         (_Hash_code_base, _Local_iterator_base, _Hashtable_base):
1605         (_Hashtable_alloc): Adjust to use non-static members of EBO helper.
1606
1607         * include/bits/hashtable_policy.h (_Hash_code_base::_M_swap): Use
1608         _S_get accessors for members in EBO helpers.
1609         (_Hash_code_base::_M_extract(), _Hash_code_base::_M_ranged_hash())
1610         (_Hash_code_base::_M_h1(), _Hash_code_base::_M_h2()): Remove non-const
1611         overloads.
1612         (_Hashtable_base::_M_swap): Use _S_get accessors for members in EBO
1613         helpers.
1614         (_Hashtable_base::_M_eq()): Remove non-const overload.
1615
1616 2019-05-15  Jonathan Wakely  <jwakely@redhat.com>
1617
1618         * include/std/variant (visit, visit<R>): Qualify calls to __do_visit.
1619
1620 2019-05-14  Jonathan Wakely  <jwakely@redhat.com>
1621
1622         * testsuite/util/testsuite_allocator.h (NullablePointer::operator bool):
1623         Fix return value.
1624
1625 2019-05-14  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
1626
1627         * config/os/solaris/solaris2.10: Move to ...
1628         * config/os/solaris: ... this.
1629         * configure.host (os_include_dir): Adapt.
1630         (abi_baseline_pair): Remove Solaris 10 handling.
1631         * config/abi/post/i386-solaris2.10: Remove.
1632         * config/abi/post/sparc-solaris2.10: Remove.
1633         * config/abi/post/i386-solaris2.11: Rename to ...
1634         * config/abi/post/i386-solaris: ... this.
1635         * config/abi/post/sparc-solaris2.11: Rename to ...
1636         * config/abi/post/sparc-solaris: ... this.
1637
1638         * libsupc++/new_opa.cc [_GLIBCXX_HAVE_MEMALIGN] [__sun]: Remove
1639         workaround.
1640
1641         * testsuite/ext/enc_filebuf/char/13598.cc: Remove *-*-solaris2.10
1642         xfail.
1643
1644 2019-05-14  Jonathan Wakely  <jwakely@redhat.com>
1645
1646         * include/std/variant (__visit_with_index): Remove typedef.
1647         (__deduce_visit_result): New tag type.
1648         (__raw_visit, __raw_idx_visit): New helper functions for "raw"
1649         visitation of possibly-valueless variants, forwarding to __do_visit
1650         with the relevant tag type.
1651         (_Variant_storage<false, _Types...>::_M_reset_impl): Use __raw_visit
1652         and make lambda return void.
1653         (__variant_construct): Likewise.
1654         (_Copy_assign_base::operator=, _Move_assign_base::operator=): Use
1655         __raw_idx_visit and make lambda return void.
1656         (_Multi_array::__untag_result): Add metafunction to check the function
1657         pointer type for a tag type that dictates the kind of visitation.
1658         (_Multi_array<_Ret(*)(_Visitor, _Variants...), __first, __rest...>):
1659         Use decltype(auto) instead of tagged function pointer type.
1660         (__gen_vtable_impl): Remove bool non-type parameter and unused
1661         _Variant_tuple parameter.
1662         (__gen_vtable_impl::__visit_invoke_impl): Remove.
1663         (__gen_vtable_impl::__do_visit_invoke): Remove.
1664         (__gen_vtable_impl::__do_visit_invoke_r): Remove.
1665         (__gen_vtable_impl::__visit_invoke): Use if-constexpr and __invoke_r
1666         for the visit<R> case, rather than dispatching to separate functions.
1667         (_VARIANT_RELATION_FUNCTION_TEMPLATE): Use __raw_idx_visit and make
1668         lambda return void.
1669         (variant::swap): Likewise.
1670         (__do_visit): Replace two non-type template parameters with a single
1671         type parameter, so that the caller must specify the visitor's return
1672         type (or one of the tag types).
1673         (visit): Deduce a return type from the visitor and use the
1674         __deduce_visit_result tag to enforce that all overloads return the
1675         same type.
1676         (visit<R>): Call __do_visit<R> with explicit result type.
1677         (__variant_hash_call_base_impl::operator()): Use __raw_visit and make
1678         lambda return void.
1679
1680 2019-05-14  Nina Dinka Ranns  <dinka.ranns@gmail.com>
1681
1682         nonesuch is insufficiently useless (lwg2996)
1683         * include/std/type_traits (struct __nonesuch): Added private base
1684         class to make __nonesuch not an aggregate and removed deleted default
1685         constructor.
1686         * include/bits/stl_pair.h (struct __nonesuch_no_braces): Removed.
1687         (operator=(const pair&)): Use __nonesuch instead of
1688         __nonesuch_no_braces.
1689         (operator=(pair&&)): Likewise
1690         * include/std/tuple (operator=(const tuple&)): Use __nonesuch instead
1691         of __nonesuch_no_braces.
1692         (operator=(tuple&&)): Likewise
1693         * include/experimental/type_traits (struct nonesuch): Added private
1694         base class to make nonesuch not an aggregate and removed deleted
1695         default constructor.
1696         * testsuite/20_util/nonesuch/nonesuch.cc: New.
1697         * testsuite/experimental/type_traits/nonesuch.cc: New.
1698
1699 2019-05-14  Jonathan Wakely  <jwakely@redhat.com>
1700
1701         * include/bits/std_function.h (_Simple_type_wrapper): Remove.
1702         (_Function_handler): Remove partial specializations for void return
1703         types and pointers to member.
1704         (_Function_handler::_M_manager): Adapt to removal of
1705         _Simple_type_wrapper.
1706         (_Function_handler::_M_invoke): Use __invoke_r instead of __invoke.
1707         * include/std/functional (_Bind_result::__enable_if_void)
1708         (_Bind_result::__disable_if_void): Remove sfinae helpers.
1709         (_Bind_result::__call): Use __invoke_r and remove overloads for void
1710         return types.
1711         * include/std/future (__future_base::_Task_state::_M_run)
1712         (__future_base::_Task_state::_M_run_delayed): Use __invoke_r and
1713         change return type of lambda expressions.
1714
1715         * include/bits/invoke.h (__invoke_r): Define new function implementing
1716         the INVOKE<R> pseudo-function.
1717         * testsuite/20_util/function_objects/invoke/1.cc: Add more tests.
1718         * testsuite/20_util/function_objects/invoke/2.cc: New test.
1719
1720         * include/std/type_traits (__is_nt_convertible_helper): Define it
1721         unconditionally, not only for C++20.
1722         (__is_nothrow_convertible): Define internal trait for use in C++11.
1723         (__is_nt_invocable_impl: Fix by using __is_nothrow_convertible.
1724         (is_invocable_r_v, is_nothrow_invocable_r_v): Add missing parameter.
1725         * testsuite/20_util/is_nothrow_convertible/value_ext.cc: New test.
1726         * testsuite/20_util/is_nothrow_convertible/value.cc: Check with type
1727         that has nothrow explicit conversion but potentially-throwing implicit
1728         conversion.
1729         * testsuite/20_util/is_nothrow_invocable/value.cc: Likewise.
1730         * testsuite/20_util/is_nothrow_invocable/value_ext.cc: Fix helper
1731         function to only consider implicit conversions.
1732         * testsuite/20_util/tuple/cons/noexcept_specs.cc: Add comment.
1733
1734         * include/std/iterator: Include <iosfwd> instead of <istream> and
1735         <ostream>.
1736
1737         * include/bits/stl_tree.h (_Rb_tree::erase(const Key*, const Key*)):
1738         Remove unused, non-standard function.
1739
1740         * include/bits/regex.h (match_results::max_size()): Adjust return
1741         value to account for prefix/suffix/unmatched subs.
1742         (match_results::_M_resize(unsigned int)): Use _Base_type::assign to
1743         reset the contained sub matches.
1744         (match_results::_M_establish_failed_match(_Bi_iter)): Add new member
1745         function to set result state following a failed match.
1746         * include/bits/regex.tcc (__regex_algo_impl): Remove loop to set
1747         sub_match states after _M_resize. Use _M_establish_failed_match.
1748
1749         PR libstdc++/69724
1750         * include/std/thread (thread::_State_impl, thread::_S_make_state):
1751         Replace single _Callable parameter with variadic _Args pack, to
1752         forward them directly to the tuple of decayed copies.
1753         * testsuite/30_threads/thread/cons/69724.cc: New test.
1754
1755 2019-05-14  Nina Dinka Ranns  <dinka.ranns@gmail.com>
1756
1757         Inconsistency wrt Allocators in basic_string assignment (LWG2579)
1758         * include/bits/basic_string.h: (operator=(const basic_string&):
1759         Move allocator decision to assign.
1760         (assign(const basic_string&)): Move allocator decision here.
1761         * testsuite/21_strings/basic_string/allocator/char/copy_assign.cc:
1762         Add tests.
1763         * testsuite/21_strings/basic_string/allocator/wchar_t/copy_assign.cc:
1764         Add tests.
1765
1766 2019-05-14  Jonathan Wakely  <jwakely@redhat.com>
1767
1768         * testsuite/util/testsuite_allocator.h (memory_resource)
1769         (default_resource_mgr): Fix indentation.
1770
1771         * testsuite/20_util/allocator_traits/members/allocate_hint_nonpod.cc:
1772         Use operator-> to access raw pointer member.
1773         * testsuite/23_containers/vector/59829.cc: Likewise.
1774         * testsuite/23_containers/vector/bool/80893.cc: Likewise.
1775         * testsuite/libstdc++-prettyprinters/cxx11.cc: Use NullablePointer.
1776         * testsuite/util/testsuite_allocator.h (NullablePointer): New utility
1777         for tests.
1778         (PointerBase, PointerBase_void): Derive from NullablePointer and use
1779         its constructors and equality operators. Change converting
1780         constructors to use operator-> to access private member of the other
1781         pointer type.
1782         (PointerBase_void::operator->()): Add, for access to private member.
1783         (operator-(PointerBase, PointerBase)): Change to hidden friend.
1784         (operator==(PointerBase, PointerBase)): Remove.
1785         (operator!=(PointerBase, PointerBase)): Remove.
1786
1787         * python/libstdcxx/v6/printers.py (UniquePointerPrinter.__init__): Do
1788         not assume field called _M_head_impl is the first tuple element.
1789         * testsuite/libstdc++-prettyprinters/compat.cc: Make tuple
1790         implementation more accurate.
1791         * testsuite/libstdc++-prettyprinters/cxx11.cc: Check unique_ptr with
1792         empty pointer type and non-empty deleter.
1793
1794         LWG 2899 - Make is_move_constructible correct for unique_ptr
1795         * include/bits/unique_ptr.h (__uniq_ptr_impl): Add move constructor,
1796         move assignment operator.
1797         (__uniq_ptr_impl::release(), __uniq_ptr_impl::reset(pointer)): Add.
1798         (__uniq_ptr_data): New class template with conditionally deleted
1799         special members.
1800         (unique_ptr, unique_ptr<T[], D>): Change type of data member from
1801         __uniq_ptr_impl<T, D> to __uniq_ptr_data<T, D>. Define move
1802         constructor and move assignment operator as defaulted.
1803         (unique_ptr::release(), unique_ptr<T[], D>::release()): Forward to
1804         __uniq_ptr_impl::release().
1805         (unique_ptr::reset(pointer), unique_ptr<T[], D>::reset<U>(U)): Forward
1806         to __uniq_ptr_impl::reset(pointer).
1807         * python/libstdcxx/v6/printers.py (UniquePointerPrinter.__init__):
1808         Check for new __uniq_ptr_data type.
1809         * testsuite/20_util/unique_ptr/dr2899.cc: New test.
1810
1811 2019-05-13  Jonathan Wakely  <jwakely@redhat.com>
1812
1813         PR libstdc++/90454.cc path construction from void*
1814         * include/bits/fs_path.h (path::_Path): Use remove_pointer so that
1815         pointers to void are rejected as well as void.
1816         * include/experimental/bits/fs_path.h (path::_Path): Likewise.
1817         * testsuite/27_io/filesystem/path/construct/80762.cc: Also check
1818         pointers to void.
1819         * testsuite/experimental/filesystem/path/construct/80762.cc: Likewise.
1820
1821         * doc/xml/manual/policy_data_structures.xml: Comment out stray
1822         <remark> elements. Fix formatting of bibliography references.
1823
1824 2019-05-13  Edward Smith-Rowland  <3dw4rd@verizon.net>
1825
1826         * doc/xml/manual/status_cxx2020.xml: Document P0811R3 status.
1827
1828 2019-05-13  Jonathan Wakely  <jwakely@redhat.com>
1829
1830         Remove Profile Mode, deprecated since 7.1.0
1831         * doc/Makefile.am: Remove XML file for profile mode docs.
1832         * doc/Makefile.in: Regenerate.
1833         * doc/xml/authors.xml: Remove authors of profile mode docs.
1834         * doc/xml/manual/appendix_contributing.xml: Remove mention of profile
1835         mode.
1836         * doc/xml/manual/debug.xml: Likewise.
1837         * doc/xml/manual/evolution.xml: Document removal of profile mode.
1838         * doc/xml/manual/profile_mode.xml: Remove profile mode docs.
1839         * doc/xml/manual/spine.xml: Remove profile mode author credit.
1840         * doc/xml/manual/test.xml: Remove docs for dg-require-profile-mode
1841         directive.
1842         * doc/xml/manual/using.xml: Remove docs for profile mode headers and
1843         macro.
1844         * doc/html/*: Regenerate.
1845         * include/Makefile.am: Remove profile mode headers.
1846         * include/Makefile.in: Regenerate.
1847         * include/bits/c++config (std::__profile): Remove namespace.
1848         [_GLIBCXX_PROFILE]: Remove checks for macro.
1849         * include/profile/array: Remove.
1850         * include/profile/base.h: Remove.
1851         * include/profile/bitset: Remove.
1852         * include/profile/deque: Remove.
1853         * include/profile/forward_list: Remove.
1854         * include/profile/impl/profiler.h: Remove.
1855         * include/profile/impl/profiler_algos.h: Remove.
1856         * include/profile/impl/profiler_container_size.h: Remove.
1857         * include/profile/impl/profiler_hash_func.h: Remove.
1858         * include/profile/impl/profiler_hashtable_size.h: Remove.
1859         * include/profile/impl/profiler_list_to_slist.h: Remove.
1860         * include/profile/impl/profiler_list_to_vector.h: Remove.
1861         * include/profile/impl/profiler_map_to_unordered_map.h: Remove.
1862         * include/profile/impl/profiler_node.h: Remove.
1863         * include/profile/impl/profiler_state.h: Remove.
1864         * include/profile/impl/profiler_trace.h: Remove.
1865         * include/profile/impl/profiler_vector_size.h: Remove.
1866         * include/profile/impl/profiler_vector_to_list.h: Remove.
1867         * include/profile/iterator_tracker.h: Remove.
1868         * include/profile/list: Remove.
1869         * include/profile/map: Remove.
1870         * include/profile/map.h: Remove.
1871         * include/profile/multimap.h: Remove.
1872         * include/profile/multiset.h: Remove.
1873         * include/profile/ordered_base.h: Remove.
1874         * include/profile/set: Remove.
1875         * include/profile/set.h: Remove.
1876         * include/profile/unordered_base.h: Remove.
1877         * include/profile/unordered_map: Remove.
1878         * include/profile/unordered_set: Remove.
1879         * include/profile/vector: Remove.
1880         * scripts/run_doxygen: Do not process profile mode headers.
1881         * testsuite/23_containers/array/element_access/60497.cc: Don't use
1882         profile mode type.
1883         * testsuite/23_containers/array/specialized_algorithms/swap_cxx17.cc:
1884         Remove dg-skip-if for profile mode.
1885         * testsuite/23_containers/forward_list/capacity/1.cc: Remove
1886         preprocessor check for profile mode.
1887         * testsuite/23_containers/list/capacity/29134.cc: Likewise.
1888         * testsuite/23_containers/map/modifiers/extract.cc: Remove dg-skip-if
1889         for profile mode.
1890         * testsuite/23_containers/map/modifiers/insert_or_assign/1.cc:
1891         Likewise.
1892         * testsuite/23_containers/map/modifiers/try_emplace/1.cc: Likewise.
1893         * testsuite/23_containers/multimap/modifiers/extract.cc: Likewise.
1894         * testsuite/23_containers/multiset/modifiers/extract.cc: Likewise.
1895         * testsuite/23_containers/set/modifiers/extract.cc: Likewise.
1896         * testsuite/23_containers/unordered_map/modifiers/extract.cc:
1897         Likewise.
1898         * testsuite/23_containers/unordered_multimap/modifiers/extract.cc:
1899         Likewise.
1900         * testsuite/23_containers/unordered_multiset/modifiers/extract.cc:
1901         Likewise.
1902         * testsuite/23_containers/unordered_set/modifiers/extract.cc:
1903         Likewise.
1904         * testsuite/23_containers/vector/bool/capacity/29134.cc: Remove
1905         preprocessor check for profile mode.
1906         * testsuite/23_containers/vector/bool/modifiers/insert/31370.cc:
1907         Likewise.
1908         * testsuite/23_containers/vector/modifiers/insert_vs_emplace.cc:
1909         Remove dg-skip-if for profile mode.
1910         * testsuite/25_algorithms/binary_search/partitioned.cc: Likewise.
1911         * testsuite/25_algorithms/equal_range/partitioned.cc: Likewise.
1912         * testsuite/25_algorithms/lexicographical_compare/71545.cc: Likewise.
1913         * testsuite/25_algorithms/lower_bound/partitioned.cc: Likewise.
1914         * testsuite/25_algorithms/upper_bound/partitioned.cc: Likewise.
1915         * testsuite/Makefile.am: Remove profile_flags variable and
1916         * testsuite/Makefile.am: Remove profile_flags variable and
1917         check-profile target.
1918         * testsuite/Makefile.in: Regenerate.
1919         * testsuite/ext/profile/all.cc: Remove.
1920         * testsuite/ext/profile/mutex_extensions_neg.cc: Remove.
1921         * testsuite/ext/profile/profiler_algos.cc: Remove.
1922         * testsuite/ext/profile/replace_new.cc: Remove.
1923         * testsuite/ext/throw_allocator/deallocate_global.cc: Remove
1924         preprocessor check for profile mode.
1925         * testsuite/ext/throw_allocator/deallocate_local.cc: Likewise.
1926         * testsuite/lib/libstdc++.exp (check_v3_target_profile_mode): Remove.
1927         (check_v3_target_normal_mode): Do not check for profile mode macro.
1928         * testsuite/libstdc++-prettyprinters/80276.cc: Remove dg-skip-if for
1929         profile mode.
1930         * testsuite/libstdc++-prettyprinters/compat.cc: Likewise.
1931         * testsuite/libstdc++-prettyprinters/cxx11.cc: Likewise.
1932         * testsuite/libstdc++-prettyprinters/cxx17.cc: Likewise.
1933         * testsuite/libstdc++-prettyprinters/debug.cc: Likewise.
1934         * testsuite/libstdc++-prettyprinters/debug_cxx11.cc: Likewise.
1935         * testsuite/libstdc++-prettyprinters/libfundts.cc: Likewise.
1936         * testsuite/libstdc++-prettyprinters/simple.cc: Likewise.
1937         * testsuite/libstdc++-prettyprinters/simple11.cc: Likewise.
1938         * testsuite/libstdc++-prettyprinters/whatis.cc: Likewise.
1939         * testsuite/libstdc++-prettyprinters/whatis2.cc: Likewise.
1940
1941         Remove array_allocator extension, deprecated since 4.9.0
1942         * doc/xml/manual/allocator.xml: Remove documentation for
1943         array_allocator.
1944         * doc/xml/manual/evolution.xml: Document array_allocator removal.
1945         * doc/xml/manual/using.xml: Remove header from documentation.
1946         * include/Makefile.am: Remove <ext/array_allocator.h> header.
1947         * include/Makefile.in: Regenerate.
1948         * include/ext/array_allocator.h: Remove.
1949         * include/precompiled/extc++.h: Do not include removed header.
1950         * testsuite/ext/array_allocator/1.cc: Remove.
1951         * testsuite/ext/array_allocator/2.cc: Remove.
1952         * testsuite/ext/array_allocator/26875.cc: Remove.
1953         * testsuite/ext/array_allocator/3.cc: Remove.
1954         * testsuite/ext/array_allocator/check_deallocate_null.cc: Remove.
1955         * testsuite/ext/array_allocator/check_delete.cc: Remove.
1956         * testsuite/ext/array_allocator/check_new.cc: Remove.
1957         * testsuite/ext/array_allocator/variadic_construct.cc: Remove.
1958         * testsuite/ext/headers.cc: Do not include removed header.
1959
1960 2019-05-11  François Dumont  <fdumont@gcc.gnu.org>
1961
1962         * include/bits/stl_bvector.h
1963         (operator==(const _Bit_iterator_base&, const _Bit_iterator_base&)):
1964         Make hidden friend.
1965         (operator<(const _Bit_iterator_base&, const _Bit_iterator_base&)):
1966         Likewise.
1967         (operator!=(const _Bit_iterator_base&, const _Bit_iterator_base&)):
1968         Likewise.
1969         (operator>(const _Bit_iterator_base&, const _Bit_iterator_base&)):
1970         Likewise.
1971         (operator<=(const _Bit_iterator_base&, const _Bit_iterator_base&)):
1972         Likewise.
1973         (operator>=(const _Bit_iterator_base&, const _Bit_iterator_base&)):
1974         Likewise.
1975         (operator-(const _Bit_iterator_base&, const _Bit_iterator_base&)):
1976         Likewise.
1977         (_Bit_iterator::operator+(difference_type)): Likewise and allow NRVO
1978         copy elision.
1979         (_Bit_iterator::operator-(difference_type)): Likewise.
1980         (operator+(ptrdiff_t, const _Bit_iterator&)): Make hidden friend.
1981         (_Bit_const_iterator::operator+(difference_type)): Likewise and allow
1982         NRVO copy elision.
1983         (_Bit_const_iterator::operator-(difference_type)): Likewise.
1984         (operator+(ptrdiff_t, const _Bit_const_iterator&)): Make hidden friend.
1985
1986 2019-05-10  Jonathan Wakely  <jwakely@redhat.com>
1987
1988         PR libstdc++/81266
1989         * testsuite/util/thread/all.h: Do not use remove_pointer for
1990         std::thread::native_handle_type.
1991
1992         PR libstdc++/90397
1993         * include/std/variant (_Variant_storage<false, Types...>::_M_storage())
1994         (_Variant_storage<true, Types...>::_M_reset()))
1995         (_Variant_storage<true, Types...>::_M_storage())): Add noexcept.
1996         (__get_storage): Likewise.
1997         (variant): Add noexcept to friend declarations for __get and
1998         __get_storage.
1999
2000         PR libstdc++/90388
2001         * include/bits/unique_ptr.h (default_delete, default_delete<T[]>):
2002         Use _Require for constraints.
2003         (operator>(nullptr_t, const unique_ptr<T,D>&)): Implement exactly as
2004         per the standard.
2005         (__uniq_ptr_hash): New base class with conditionally-disabled call
2006         operator.
2007         (hash<unique_ptr<T,D>>): Derive from __uniq_ptr_hash.
2008         * testsuite/20_util/default_delete/48631_neg.cc: Adjust dg-error line.
2009         * testsuite/20_util/unique_ptr/hash/90388.cc: New test.
2010
2011         * include/bits/shared_ptr.h: Improve docs.
2012         * include/bits/shared_ptr_base.h: Likewise.
2013         * include/bits/stl_uninitialized.h: Likewise.
2014         * include/bits/unique_ptr.h: Likewise.
2015         * libsupc++/new: Likewise.
2016
2017 2019-05-09  François Dumont  <fdumont@gcc.gnu.org>
2018
2019         * include/bits/stl_deque.h
2020         (operator==(const _Deque_iterator<>&, const _Deque_iterator<>&)):
2021         Make hidden friend.
2022         (operator!=(const _Deque_iterator<>&, const _Deque_iterator<>&)):
2023         Likewise.
2024         (operator<(const _Deque_iterator<>&, const _Deque_iterator<>&)):
2025         Likewise.
2026         (operator<=(const _Deque_iterator<>&, const _Deque_iterator<>&)):
2027         Likewise.
2028         (operator>(const _Deque_iterator<>&, const _Deque_iterator<>&)):
2029         Likewise.
2030         (operator>=(const _Deque_iterator<>&, const _Deque_iterator<>&)):
2031         Likewise.
2032         (_Deque_iterator<>::operator+(difference_type)): Likewise and allow NRVO
2033         copy elision.
2034         (_Deque_iterator<>::operator-(difference_type)): Likewise.
2035
2036 2019-05-08  François Dumont  <fdumont@gcc.gnu.org>
2037
2038         PR libstdc++/90277
2039         * testsuite/23_containers/unordered_multiset/insert/24061-multiset.cc
2040         (test01): Reserve for number of insertions to avoid rehash during test.
2041         * testsuite/23_containers/unordered_multimap/insert/24061-multimap.cc
2042         (test01): Likewise.
2043         * testsuite/23_containers/unordered_multimap/insert/24061-multimap.cc
2044         (test01): Likewise.
2045         (test02): Likewise.
2046         (test03): Likewise.
2047
2048 2019-05-08  Jonathan Wakely  <jwakely@redhat.com>
2049
2050         * include/experimental/bits/fs_path.h: Improve docs.
2051         * include/experimental/bits/net.h: Fix wrong header name in comment.
2052         Do not document implementation details.
2053         * include/experimental/netfwd: Fix doxygen grouping.
2054
2055 2019-05-07  Jonathan Wakely  <jwakely@redhat.com>
2056
2057         * include/bits/stl_pair.h: Improve docs.
2058         * include/std/tuple: Likewise.
2059
2060         * doc/doxygen/doxygroups.cc (std::literals): Add documentation for
2061         inline namespace.
2062         * include/std/chrono: Improve docs.
2063         * include/std/ratio: Do not document implementation details.
2064         * testsuite/20_util/ratio/cons/cons_overflow_neg.cc: Adjust dg-error
2065         line numbers.
2066         * testsuite/20_util/ratio/operations/ops_overflow_neg.cc: Likewise.
2067
2068         PR libstdc++/89102
2069         * doc/xml/manual/intro.xml: Document DR 2408 and 2465 changes.
2070         * include/std/chrono (__duration_common_type_wrapper): Replace with ...
2071         (__duration_common_type): New helper.
2072         (common_type<chrono::duration<R1, P2>, chrono::duration<R2, P2>>): Use
2073         __duration_common_type.
2074         (__timepoint_common_type_wrapper): Replace with ...
2075         (__timepoint_common_type): New helper.
2076         (common_type<chrono::time_point<C, D2>, chrono::time_point<C, D2>>):
2077         Use __time_point_common_type.
2078         * include/std/type_traits (common_type<>): Define, as per LWG 2408.
2079         (__common_type_impl): If either argument is transformed by decay,
2080         use the common_type of the decayed types.
2081         (__common_type_impl<_Tp, _Up, _Tp, _Up>): If the types are already
2082         decayed, use __do_common_type_impl to get the common_type.
2083         (common_type<_Tp>): Use common_type<_Tp, _Tp>.
2084         (__do_member_type_wrapper, __member_type_wrapper)
2085         (__expanded_common_type_wrapper): Remove.
2086         (__common_type_pack, __common_type_fold): New helpers.
2087         (common_type<_Tp, _Up, _Vp...>): Use new helpers instead of
2088         __member_type_wrapper and __expanded_common_type_wrapper.
2089         * testsuite/20_util/common_type/requirements/explicit_instantiation.cc:
2090         Test zero-length template argument list.
2091         * testsuite/20_util/common_type/requirements/sfinae_friendly_1.cc:
2092         Test single argument cases and argument types that should decay.
2093         * testsuite/20_util/common_type/requirements/sfinae_friendly_2.cc:
2094         Adjust expected error.
2095         * testsuite/20_util/duration/literals/range_neg.cc: Use zero for
2096         dg-error lineno.
2097         * testsuite/20_util/duration/requirements/typedefs_neg1.cc: Likewise.
2098         * testsuite/20_util/duration/requirements/typedefs_neg2.cc: Likewise.
2099         * testsuite/20_util/duration/requirements/typedefs_neg3.cc: Likewise.
2100
2101         * doc/xml/manual/intro.xml: Fix DR 2537 and DR 2566 confusion.
2102
2103 2019-05-01  Nina Dinka Ranns  <dinka.ranns@gmail.com>
2104
2105         Make allocator propagation more consistent for
2106         operator+(basic_string) (P1165R1)
2107         * include/bits/basic_string.h
2108         (operator+(basic_string&&, basic_string&&): Changed resulting
2109         allocator to always be the one from the first parameter.
2110         * include/bits/basic_string.tcc
2111         (operator+(const _CharT*, const basic_string&)): Changed
2112         resulting allocator to be SOCCC on the second parameter's allocator.
2113         (operator+(_CharT, const basic_string&)): Likewise.
2114         * testsuite/21_strings/basic_string/allocator/char/operator_plus.cc:
2115         New.
2116         * testsuite/21_strings/basic_string/allocator/wchar_t/operator_plus.cc:
2117         New.
2118
2119 2019-05-07  Jonathan Wakely  <jwakely@redhat.com>
2120
2121         * include/bits/regex.h: Improve docs.
2122         * include/bits/regex.tcc: Do not document implementation details.
2123
2124         * testsuite/19_diagnostics/error_code/hash.cc: New test.
2125
2126 2019-05-06  François Dumont  <fdumont@gcc.gnu.org>
2127
2128         * python/libstdcxx/v6/printers.py (add_one_template_type_printer):
2129         Add type printer for container types in std::__debug namespace.
2130         * testsuite/lib/gdb-test.exp (whatis-regexp-test): New.
2131         (gdb-tests): Use distinct parameters for the type of test and use of
2132         regex.
2133         (gdb-test): Check for regex test even if 'whatis' test.
2134         * testsuite/libstdc++-prettyprinters/80276.cc: Adapt for _GLIBCXX_DEBUG
2135         mode.
2136         * testsuite/libstdc++-prettyprinters/cxx11.cc: Likewise.
2137         * testsuite/libstdc++-prettyprinters/cxx17.cc: Likewise.
2138         * testsuite/libstdc++-prettyprinters/libfundts.cc: Likewise.
2139         * testsuite/libstdc++-prettyprinters/simple.cc: Likewise.
2140         * testsuite/libstdc++-prettyprinters/simple11.cc: Likewise.
2141         * testsuite/libstdc++-prettyprinters/whatis.cc: Likewise.
2142         * testsuite/libstdc++-prettyprinters/whatis2.cc: Likewise.
2143
2144 2019-05-04  Jonathan Wakely  <jwakely@redhat.com>
2145
2146         * include/std/system_error (error_category): Fix comment.
2147
2148         PR libstdc++/90299
2149         * src/c++17/fs_ops.cc (absolute(const path&)): Report an error if the
2150         argument is an empty path.
2151         (absolute(const path&, error_code&)): Use invalid_argument as error
2152         code instead of no_such_file_or_directory.
2153         * testsuite/27_io/filesystem/operations/absolute.cc: Check handling
2154         of non-existent paths and empty paths with both overloads of absolute.
2155
2156         * include/std/system_error (error_category, error_code)
2157         (error_condition): Improve docs.
2158         * libsupc++/exception: Add missing @addtogroup Doxygen command.
2159         * libsupc++/exception_ptr.h (exception_ptr): Link equality operators
2160         to class documentation. Suppress documentation for implementation
2161         details.
2162         * libsupc++/nested_exception.h (throw_with_nested, rethrow_if_nested):
2163         Suppress documentation for implementation details.
2164
2165         * include/std/system_error (error_code): Remove friend declaration
2166         for hash<error_code>.
2167         (hash<error_code>::operator()): Use public member functions to access
2168         value and category.
2169         (hash<error_condition>::operator()): Use address of category, not
2170         its object representation.
2171         * src/c++11/compatibility-c++0x.cc (hash<error_code>::operator()):
2172         Use public member functions to access value and category.
2173         * testsuite/19_diagnostics/error_condition/hash.cc: New test.
2174
2175 2019-05-04  François Dumont  <fdumont@gcc.gnu.org>
2176
2177         * include/bits/hashtable.h (_Hashtable<>::rehash): Review comment.
2178         * include/bits/hashtable_policy.h
2179         (_Prime_rehash_policy::_M_bkt_for_elements): Use __builtin_ceill.
2180         (_Power2_rehash_policy::_M_bkt_for_elements): Likewise.
2181         (_Power2_rehash_policy::_M_next_bkt): Enforce returning a result not
2182         smaller than input value rather than always greater. Preserve
2183         _M_next_resize if called with 0 input. Use __builtin_floorl.
2184         (_Power2_rehash_policy::_M_need_rehash): Rehash only if number of
2185         elements + number of insertions is greater than _M_next_resize. Start
2186         with 11 buckets if not told otherwise. Use __builtin_floorl.
2187         (_Rehash_base<>::reserve): Use rehash policy _M_bkt_for_elements.
2188         * src/c++11/hashtable_c++0x.cc (_Prime_rehash_policy::_M_next_bkt):
2189         Preserve _M_next_resize if called with 0 input. Use __builtin_floorl.
2190         (_Prime_rehash_policy::_M_need_rehash): Start with 11 buckets if not
2191         told otherwise. Use __builtin_floorl.
2192         * testsuite/23_containers/unordered_set/hash_policy/71181.cc: Adapt test
2193         to also validate _Power2_rehash_policy.
2194         * testsuite/23_containers/unordered_set/hash_policy/power2_rehash.cc:
2195         Adapt.
2196
2197 2019-05-03  Jonathan Wakely  <jwakely@redhat.com>
2198
2199         PR libstdc++/61761
2200         * testsuite/26_numerics/complex/proj.cc: Don't assume <cmath> defines
2201         std::copysign.
2202
2203         PR libstdc++/52119
2204         * include/ext/numeric_traits.h (__glibcxx_min): Avoid integer
2205         overflow warning with -Wpedantic -Wsystem-headers.
2206
2207 2019-05-02  Jonathan Wakely  <jwakely@redhat.com>
2208
2209         PR libstdc++/90314
2210         * include/bits/c++config (_GLIBCXX_NOEXCEPT_IF): Use variadic macro.
2211         * include/bits/move.h (swap): Remove extra parentheses.
2212
2213         * include/experimental/bits/lfts_config.h: Improve doc markup.
2214         * include/experimental/optional: Improve docs.
2215         (_Has_addressof_mem, _Has_addressof_free, _Has_addressof)
2216         (__constexpr_addressof): Remove.
2217         (optional::operator->()): Use std::__addressof().
2218         * include/std/optional (optional::operator->()): Adjust whitespace.
2219         * testsuite/experimental/optional/constexpr/observers/2.cc: Check
2220         that operator-> is still constexpr with overloaded operator&. Change
2221         to compile-only test.
2222         * testsuite/experimental/optional/constexpr/observers/3.cc: Change to
2223         compile-only test.
2224
2225         * include/bits/shared_ptr.h: Improve docs.
2226         * include/bits/shared_ptr_atomic.h: Likewise.
2227         * include/bits/unique_ptr.h: Likewise. Adjust whitespace.
2228
2229         * include/bits/basic_string.h: Fix iterator/index confusion in
2230         Doxygen comments.
2231         * include/bits/range_access.h: Fix Doxygen warnings.
2232         * include/bits/refwrap.h: Do not document implementation details.
2233         (ref, cref): Group docs with reference_wrapper.
2234         * include/std/fstream: Fix Doxygen markup.
2235         * libsupc++/initializer_list (begin, end): Group docs with
2236         initializer_list.
2237
2238         * doc/doxygen/user.cfg.in: Set MARKDOWN_SUPPORT=YES.
2239
2240         * include/bits/unique_lock.h: Fix/improve doxygen markup.
2241         * include/std/mutex: Likewise.
2242         * include/std/shared_mutex: Likewise.
2243
2244         * include/bits/fs_dir.h: Fix/improve doxygen markup.
2245         * include/bits/fs_fwd.h: Likewise.
2246         * include/bits/fs_ops.h: Likewise.
2247         * include/bits/fs_path.h: Likewise.
2248         * include/std/filesystem: Likewise.
2249
2250         * include/experimental/bits/net.h: Fix/improve doxygen markup.
2251         * include/experimental/buffer: Likewise.
2252         * include/experimental/executor: Likewise.
2253         * include/experimental/internet: Likewise.
2254         * include/experimental/io_context: Likewise.
2255         * include/experimental/net: Likewise.
2256         * include/experimental/netfwd: Likewise.
2257         * include/experimental/socket: Likewise.
2258         * include/experimental/timer: Likewise.
2259
2260         * doc/doxygen/doxygroups.cc: Move description of experimental group
2261         here.
2262         * include/experimental/algorithm: Add to libfund-ts doc group.
2263         * include/experimental/any: Likewise. Do not document implementation
2264         details.
2265         * include/experimental/array: Add to libfund-ts doc group.
2266         * include/experimental/bits/lfts_config.h: Define libfund-ts doc group
2267         for Library Fundamentals.
2268         * include/experimental/chrono: Add to libfund-ts doc group.
2269         * include/experimental/deque: Likewise.
2270         * include/experimental/forward_list: Likewise.
2271         * include/experimental/functional: Likewise.
2272         * include/experimental/iterator: Likewise.
2273         * include/experimental/list: Likewise.
2274         * include/experimental/map: Likewise.
2275         * include/experimental/memory: Likewise.
2276         * include/experimental/memory_resource: Likewise. Improve docs.
2277         details.
2278         * include/experimental/numeric: Add to libfund-ts doc group.
2279         * include/experimental/optional: Likewise.
2280         * include/experimental/propagate_const: Likewise.
2281         * include/experimental/random: Likewise.
2282         * include/experimental/ratio: Likewise.
2283         * include/experimental/regex: Likewise.
2284         * include/experimental/set: Likewise.
2285         * include/experimental/source_location: Likewise.
2286         * include/experimental/string: Likewise.
2287         * include/experimental/string_view: Likewise.
2288         * include/experimental/system_error: Likewise.
2289         * include/experimental/tuple: Likewise.
2290         * include/experimental/type_traits: Likewise.
2291         * include/experimental/unordered_map: Likewise.
2292         * include/experimental/unordered_set: Likewise.
2293         * include/experimental/utility: Likewise.
2294         * include/experimental/vector: Likewise.
2295         * testsuite/experimental/any/misc/any_cast_neg.cc: Adjust dg-error.
2296         * testsuite/experimental/array/neg.cc: Adjust dg-error.
2297         * testsuite/experimental/propagate_const/assignment/move_neg.cc:
2298         Likewise.
2299         * testsuite/experimental/propagate_const/cons/move_neg.cc: Likewise.
2300         * testsuite/experimental/propagate_const/requirements2.cc: Likewise.
2301         * testsuite/experimental/propagate_const/requirements3.cc: Likewise.
2302         * testsuite/experimental/propagate_const/requirements4.cc: Likewise.
2303         * testsuite/experimental/propagate_const/requirements5.cc: Likewise.
2304
2305         * include/experimental/bits/fs_dir.h: Fix Doxygen markup.
2306         * include/experimental/bits/fs_fwd.h: Improve docs.
2307         * include/experimental/bits/fs_ops.h: fix Doxygen markup.
2308         * include/experimental/bits/fs_path.h: Likewise.
2309         (path, filesystem_error, u8path): Improve docs.
2310         * include/experimental/filesystem: Link to docs for TS.
2311
2312         * config/allocator/new_allocator_base.h (__allocator_base): Add
2313         workaround for Doxygen bug #6945.
2314         * include/std/memory: Improve docs. Define group for pointer safety.
2315         * include/std/scoped_allocator: Improve docs. Use "undocumented"
2316         conditional to suppress documentation for implementation details.
2317
2318         * include/bits/specfun.h: Improve docs.
2319         * include/tr1/cmath: Likewise. Fix nesting of preprocessor conditions
2320         and namespaces.
2321
2322         * doc/doxygen/doxygroups.cc (std::tr2, std::__gnu_cxx): Improve docs.
2323         (std::experimental): Add docs.
2324         * doc/doxygen/user.cfg.in (PREDEFINED): Expand macros for __cxx11
2325         namespace to nothing when generating docs.
2326         * include/bits/regex_constants.h (std::regex_constants): Improve docs.
2327         * include/std/chrono (std::chrono): Likewise.
2328         * include/std/functional (std::placeholders): Likewise.
2329         * include/std/thread (std::this_thread): Likewise.
2330
2331         * include/parallel/settings.h: Fix Doxygen markup.
2332
2333         * include/ext/pb_ds/detail/bin_search_tree_/*_imps.hpp: Do not define
2334         anything unless PB_DS_CLASS_C_DEC is defined.
2335         * include/ext/pb_ds/detail/binary_heap_/*_imps.hpp: Likewise.
2336         * include/ext/pb_ds/detail/binomial_heap_/*_imps.hpp: Likewise.
2337         * include/ext/pb_ds/detail/binomial_heap_base_/*_imps.hpp: Likewise.
2338         * include/ext/pb_ds/detail/cc_hash_table_map_/*_imps.hpp: Likewise.
2339         * include/ext/pb_ds/detail/gp_hash_table_map_/*_imps.hpp: Likewise.
2340         * include/ext/pb_ds/detail/hash_fn/*_imp.hpp: Likewise.
2341         * include/ext/pb_ds/detail/left_child_next_sibling_heap_/*_imps.hpp:
2342         Likewise.
2343         * include/ext/pb_ds/detail/list_update_map_/*_imps.hpp: Likewise.
2344         * include/ext/pb_ds/detail/ov_tree_map_/*_imps.hpp: Likewise.
2345         * include/ext/pb_ds/detail/pairing_heap_/*_imps.hpp: Likewise.
2346         * include/ext/pb_ds/detail/pat_trie_/*_imps.hpp: Likewise.
2347         * include/ext/pb_ds/detail/rb_tree_map_/*_imps.hpp: Likewise.
2348         * include/ext/pb_ds/detail/rc_binomial_heap_/*_imps.hpp: Likewise.
2349         * include/ext/pb_ds/detail/resize_policy*_imp.hpp: Likewise.
2350         * include/ext/pb_ds/detail/splay_tree_/*_imps.hpp: Likewise.
2351         * include/ext/pb_ds/detail/thin_heap_/*_imps.hpp: Likewise.
2352         * include/ext/pb_ds/detail/trie_policy*_imp.hpp: Likewise.
2353         * include/ext/pb_ds/detail/unordered_iterator/const_iterator.hpp:
2354         Likewise.
2355         * include/ext/pb_ds/detail/unordered_iterator/iterator.hpp: Likewise.
2356         * include/ext/pb_ds/detail/unordered_iterator/point_const_iterator.hpp:
2357         Likewise.
2358         * include/ext/pb_ds/detail/unordered_iterator/point_iterator.hpp:
2359         Likewise.
2360
2361         * doc/doxygen/user.cfg.in: Regenerate with Doxygen 1.8.14 and set
2362         GROUP_NESTED_COMPOUNDS=YES and SORT_BY_SCOPE_NAME=NO. Add various
2363         _GLIBCXX_xxx macros and __attribute__(X) to PREDEFINED macros that
2364         Doxygen expands.
2365
2366 2019-05-01  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
2367
2368         * config/abi/post/i386-solaris2.10/baseline_symbols.txt: Regenerate.
2369         * config/abi/post/i386-solaris2.10/amd64/baseline_symbols.txt: Likewise.
2370         * config/abi/post/i386-solaris2.11/baseline_symbols.txt: Likewise.
2371         * config/abi/post/i386-solaris2.11/amd64/baseline_symbols.txt: Likewise.
2372         * config/abi/post/sparc-solaris2.10/baseline_symbols.txt: Likewise.
2373         * config/abi/post/sparc-solaris2.10/sparcv9/baseline_symbols.txt:
2374         Likewise.
2375         * config/abi/post/sparc-solaris2.11/baseline_symbols.txt: Likewise.
2376         * config/abi/post/sparc-solaris2.11/sparcv9/baseline_symbols.txt:
2377         Likewise.
2378
2379 2019-05-01  Jonathan Wakely  <jwakely@redhat.com>
2380
2381         PR libstdc++/61761
2382         * include/std/complex (__complex_proj): Return parameter unchanged.
2383         [_GLIBCXX_USE_C99_COMPLEX] (__complex_proj): Change overloads for
2384         floating-point types to take std::complex arguments.
2385         [_GLIBCXX_USE_C99_MATH_TR1] (__complex_proj): Add overloads for
2386         floating-point types.
2387         * testsuite/26_numerics/complex/proj.cc: New test.
2388
2389 2019-04-30  Jakub Jelinek  <jakub@redhat.com>
2390
2391         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Change _Lock_policyE2 exports
2392         to _Lock_policyE[012].
2393         * config/abi/post/riscv64-linux-gnu/baseline_symbols.txt: Update.
2394
2395 2019-04-30  Jonathan Wakely  <jwakely@redhat.com>
2396
2397         * testsuite/27_io/filesystem/path/decompose/root_path.cc: Remove
2398         macros accidentally left in.
2399         * testsuite/27_io/filesystem/path/native/string-char8_t.cc: Remove
2400         unnecessary -lstdc++fs option. Fix test for mingw.
2401         * testsuite/experimental/filesystem/path/native/string-char8_t.cc:
2402         Fix test for mingw.
2403
2404 2019-04-30  Jakub Jelinek  <jakub@redhat.com>
2405
2406         * config/abi/post/riscv64-linux-gnu/baseline_symbols.txt: Update.
2407
2408 2019-04-29  Jonathan Wakely  <jwakely@redhat.com>
2409
2410         * include/bits/stl_algo.h (generate_n): Adjust doxygen comment.
2411
2412         * include/bits/move.h (swap(T&, T&), swap(T (&)[N], T (&)[N])): Use
2413         _GLIBCXX_NOEXCEPT_IF to simplify declarations.
2414
2415         PR libstdc++/71312
2416         * src/c++11/shared_ptr.cc (get_mutex): Align pool mutexes to 64 bytes.
2417
2418         * include/bits/stl_bvector.h (vector<bool>::empty()): Add nodiscard
2419         attribute.
2420
2421         * include/bits/stl_iterator_base_types.h (_Iter_base): Remove unused
2422         class template and partial specialization.
2423
2424         PR libstdc++/87982
2425         * include/bits/stl_algo.h (generate_n): Convert _Size parameter to
2426         an integral type.
2427         * include/bits/stl_algobase.h (__size_to_integer): New overloaded
2428         functions to convert a value to an integral type.
2429         (__fill_n_a, __fill_n_a): Assert that __n is already an integral type.
2430         (fill_n): Convert _Size parameter to an integral type.
2431         * testsuite/25_algorithms/fill_n/87982.cc: New test.
2432         * testsuite/25_algorithms/fill_n/87982_neg.cc: New test.
2433         * testsuite/25_algorithms/fill_n/dr426.cc: New test.
2434         * testsuite/25_algorithms/generate_n/87982.cc: New test.
2435         * testsuite/25_algorithms/generate_n/87982_neg.cc: New test.
2436         * testsuite/25_algorithms/generate_n/dr426.cc: New test.
2437
2438 2019-04-28  Nina Dinka Ranns  <dinka.ranns@gmail.com>
2439
2440         Adding noexcept-specification on tuple constructors (LWG 2899)
2441         * libstdc++-v3/include/std/tuple:
2442         (tuple()): Add noexcept-specification.
2443         (tuple(const _Elements&...)): Likewise
2444         (tuple(_UElements&&...)): Likewise
2445         (tuple(const tuple<_UElements...>&)): Likewise
2446         (tuple(tuple<_UElements...>&&)): Likewise
2447         (tuple(const _T1&, const _T2&)): Likewise
2448         (tuple(_U1&&, _U2&&)): Likewise
2449         (tuple(const tuple<_U1, _U2>&): Likewise
2450         (tuple(tuple<_U1, _U2>&&): Likewise
2451         (tuple(const pair<_U1, _U2>&): Likewise
2452         (tuple(pair<_U1, _U2>&&): Likewise
2453         * libstdc++-v3/testsuite/20_util/tuple/cons/noexcept_specs.cc: New
2454
2455 2019-04-27  Marc Glisse  <marc.glisse@inria.fr>
2456
2457         PR libstdc++/87106
2458         * include/bits/stl_uninitialized.h (__relocate_object_a): Mark the
2459         arguments with __restrict.
2460
2461 2019-04-26  H.J. Lu  <hongjiu.lu@intel.com>
2462
2463         * config/abi/post/x86_64-linux-gnu/x32/baseline_symbols.txt: Updated.
2464
2465 2019-04-26  Jonathan Wakely  <jwakely@redhat.com>
2466
2467         * include/experimental/bits/fs_path.h
2468         (path::_S_convert_loc<_InputIterator>): Create const std::string to
2469         avoid redundant call to _S_convert_loc with non-const pointers.
2470
2471         * testsuite/20_util/variant/run.cc: Use a new Hashable type to test
2472         hashing, because pmr::string depends on _GLIBCXX_USE_CXX11_ABI==1.
2473         * testsuite/21_strings/basic_string/hash/hash.cc
2474         [!_GLIBCXX_USE_CXX11_ABI]: Don't test pmr strings.
2475         * testsuite/21_strings/basic_string/hash/hash_char8_t.cc
2476         [!_GLIBCXX_USE_CXX11_ABI]: Likewise.
2477
2478         * config/abi/pre/gnu.ver (GLIBCXX_3.4): Replace wildcard that matches
2479         wstring::_M_replace_dispatch with more specific patterns.
2480         * include/bits/fs_path.h (path::_S_convert_loc<_InputIterator>):
2481         Create const std::string to avoid redundant call to _S_convert_loc
2482         with non-const pointers.
2483         * include/bits/locale_conv.h (__do_str_codecvt): Use if-constexpr to
2484         avoid unnecessary basic_string::assign instantiations.
2485
2486         * include/std/memory (__uses_alloc_args): Add string-literal to
2487         static_assert, to match the one in __uses_alloc.
2488         [__cpp_concepts] (_Std_pair): Use C++2a syntax for concept.
2489         * testsuite/20_util/polymorphic_allocator/construct_c++2a.cc: Check
2490         for recursive uses-allocator construction of nested pairs.
2491         * testsuite/20_util/scoped_allocator/construct_pair_c++2a.cc:: Add
2492         comment.
2493
2494 2019-04-26  Jakub Jelinek  <jakub@redhat.com>
2495
2496         * config/abi/post/s390x-linux-gnu/32/baseline_symbols.txt: Update.
2497         * config/abi/post/s390-linux-gnu/baseline_symbols.txt: Update.
2498         * config/abi/post/powerpc-linux-gnu/baseline_symbols.txt: Update.
2499         * config/abi/post/powerpc64-linux-gnu/32/baseline_symbols.txt: Update.
2500
2501         * config/abi/post/x86_64-linux-gnu/baseline_symbols.txt: Update.
2502         * config/abi/post/x86_64-linux-gnu/32/baseline_symbols.txt: Update.
2503         * config/abi/post/i386-linux-gnu/baseline_symbols.txt: Update.
2504         * config/abi/post/i486-linux-gnu/baseline_symbols.txt: Update.
2505         * config/abi/post/aarch64-linux-gnu/baseline_symbols.txt: Update.
2506         * config/abi/post/s390x-linux-gnu/baseline_symbols.txt: Update.
2507         * config/abi/post/powerpc64-linux-gnu/baseline_symbols.txt: Update.
2508
2509 2019-04-25  Jonathan Wakely  <jwakely@redhat.com>
2510
2511         PR libstdc++/90239
2512         * doc/xml/manual/status_cxx2020.xml: Amend P0591R4 status.
2513         * include/std/scoped_allocator [__cplusplus > 201703L]
2514         (scoped_allocator_adaptor::construct): Define in terms of
2515         uses_allocator_construction_args, as per P0591R4.
2516         * testsuite/20_util/scoped_allocator/construct_pair_c++2a.cc: New test.
2517         * testsuite/util/testsuite_allocator.h: Remove name of unused
2518         parameter.
2519
2520 2019-04-24  Jonathan Wakely  <jwakely@redhat.com>
2521
2522         * doc/xml/manual/status_cxx2017.xml: Document P0024R2 status.
2523         * doc/html/*: Regenerate.
2524
2525         * include/bits/fs_path.h (operator<, operator<=, operator>)
2526         (operator>=, operator==, operator!=): Make hidden friends, as per
2527         LWG 3065.
2528         * testsuite/27_io/filesystem/path/native/string-char8_t.cc: Fix
2529         string type in test.
2530         * testsuite/27_io/filesystem/path/native/string.cc: Likewise.
2531
2532         * include/std/any (any::any(ValueType&&)): Use __and_v.
2533         * include/std/numeric (midpoint(T, T, T), midpoint(T*, T*, T*)):
2534         Likewise.
2535
2536         * include/std/tuple (apply): Use remove_reference_t instead of decay_t
2537         as per P0777R1.
2538         * include/std/type_traits (__result_of_memfun): Use remove_reference
2539         instead of __remove_cvref_t and remove redundant is_same check.
2540         (__inv_unwrap): Use __remove_cvref_t instead of decay_t.
2541
2542         * include/experimental/string_view (basic_string_view::pointer)
2543         (basic_string_view::reference): Fix to refer to non-const value_type.
2544         * include/bits/basic_string.h (basic_string): Use __sv_check and
2545         __sv_limit instead of basic_string_view::_M_check and
2546         basic_string_view::_M_limit.
2547         * include/std/string_view (__sv_check, __sv_limit): New
2548         helper functions to replace basic_string_view::_M_check and
2549         basic_string_view::_M_limit.
2550         (basic_string_view): Add static assertions to enforce ill-formed
2551         requirement for traits_type::char_type from P1148R0, and to enforce
2552         required properties of char-like types.
2553         (basic_string_view::pointer, basic_string_view::reference): Fix to
2554         refer to non-const value_type.
2555         (basic_string_view::operator[], basic_string_view::at)
2556         (basic_string_view::front, basic_string_view::back)
2557         (basic_string_view::data): Use const_reference and const_pointer
2558         typedefs for return types.
2559         (basic_string_view::_M_check, basic_string_view::_M_limit): Remove.
2560         (hash<wstring_view>): Fix argument_type typedef.
2561         * testsuite/21_strings/basic_string_view/modifiers/remove_prefix/
2562         char/1.cc: Fix expected return type of basic_string_view::data().
2563         * testsuite/21_strings/basic_string_view/modifiers/remove_prefix/
2564         wchar_t/1.cc: Likewise.
2565         * testsuite/21_strings/basic_string_view/modifiers/remove_suffix/
2566         char/1.cc: Likewise.
2567         * testsuite/21_strings/basic_string_view/modifiers/remove_suffix/
2568         wchar_t/1.cc: Likewise.
2569         * testsuite/21_strings/basic_string_view/requirements/traits_neg.cc:
2570         New test.
2571         * testsuite/21_strings/basic_string_view/requirements/typedefs.cc:
2572         Check reference and pointer typedefs.
2573         * testsuite/experimental/string_view/requirements/typedefs.cc:
2574         Likewise.
2575         * testsuite/experimental/string_view/modifiers/remove_prefix/char/1.cc:
2576         Fix expected return type of basic_string_view::data().
2577         * testsuite/experimental/string_view/modifiers/remove_prefix/wchar_t/
2578         1.cc: Likewise.
2579         * testsuite/experimental/string_view/modifiers/remove_suffix/char/1.cc:
2580         Likewise.
2581         * testsuite/experimental/string_view/modifiers/remove_suffix/wchar_t/
2582         1.cc: Likewise.
2583
2584         PR libstdc++/90220
2585         * include/std/any (__any_caster): Use remove_cv_t instead of decay_t.
2586         Avoid a runtime check for types that can never be stored in std::any.
2587         * testsuite/20_util/any/misc/any_cast.cc: Test std::any_cast with
2588         array types.
2589
2590         PR libstdc++/90220 (partial)
2591         * include/std/any (any_cast<T>(any*), any_cast<T>(const any*)): Do
2592         not attempt ill-formed static_cast to pointers to non-object types.
2593         * testsuite/20_util/any/misc/any_cast.cc: Test std::any_cast with
2594         function types.
2595
2596         * testsuite/20_util/variant/run.cc: Catch exception by reference to
2597         prevent -Wcatch-value warning.
2598
2599         * include/std/variant (__variant_construct): Use template parameter
2600         type instead of equivalent decltype-specifier.
2601         (_Move_ctor_base<false, Types...>::_Move_ctor_base(_Move_ctor_base&&)):
2602         Replace forward with move.
2603         (_Move_ctor_base<false, Types...>::_M_destructive_move)
2604         (_Move_ctor_base<false, Types...>::_M_destructive_copy)
2605         (_Move_ctor_base<true, Types...>::_M_destructive_move)
2606         (_Move_ctor_base<true, Types...>::_M_destructive_copy): Only set the
2607         index after construction succeeds.
2608         (_Copy_assign_base<false, Types...>::operator=): Remove redundant
2609         if-constexpr checks that are always true. Use __remove_cvref_t instead
2610         of remove_reference so that is_nothrow_move_constructible check
2611         doesn't use a const rvalue parameter. In the potentially-throwing case
2612         construct a temporary and move assign it, as per LWG 2904.
2613         (_Move_assign_base<false, Types...>::operator=): Remove redundant
2614         if-constexpr checks that are always true. Use emplace as per LWG 2904.
2615         (variant::operator=(T&&)): Only use emplace conditionally, otherwise
2616         construct a temporary and move assign from it, as per LWG 2904.
2617         * testsuite/20_util/variant/exception_safety.cc: Check that
2618         assignment operators have strong exception safety guarantee.
2619
2620 2019-04-23  Thomas Rodgers <trodgers@redhat.com>
2621
2622         Document PSTL linker flags
2623
2624         * doc/xml/manual/using.xml: Add PSTL linker flags to table 3.1.
2625
2626 2019-04-23  Jonathan Wakely  <jwakely@redhat.com>
2627
2628         * include/std/variant (__detail::__variant::_Traits): Make
2629         _S_trivial_copy_assign depend on _S_trivial_copy_ctor and make
2630         _S_trivial_move_assign depend on _S_trivial_move_ctor, as per
2631         P0602R4.
2632         (__detail::__variant::_Copy_assign_alias): Only depend on
2633         _S_trivial_copy_assign, which subsumes _S_trivial_copy_ctor now.
2634         * testsuite/20_util/variant/compile.cc: Correct checks for trivial
2635         move assignment operators.
2636
2637         PR libstdc++/90165
2638         * include/std/variant (variant::__not_self): New helper for the
2639         is_same_v<remove_cvref_t<T>, variant>==false constraints.
2640         (variant::__to_type_impl): Remove.
2641         (variant::__to_type): Add default argument to check pack size, instead
2642         of using __to_type_impl.
2643         (variant::__accepted_type): Add default argument using __not_self.
2644         (variant::__is_in_place_tag, variant::__not_in_place_tag): New helpers
2645         for variant(T&&) constructor constraint.
2646         (variant::variant(T&&)): Use __not_in_place_tag in constraints.
2647         Extract __accepted_type into a named template parameter for reuse in
2648         other constraints and in the exception specification.
2649         (variant::variant(in_place_type_t<T>, Args&&...))
2650         (variant::variant(in_place_type_t<T>, initializer_list<U>, Args&&...))
2651         (variant::variant(in_place_index_t<T>, Args&&...))
2652         (variant::variant(in_place_index_t<T>, initializer_list<U>, Args&&...))
2653         (variant::operator=T&&)): Remove redundant && from trait arguments.
2654         * testsuite/20_util/variant/compile.cc: Check variant(T&&) constructor
2655         isn't used for in_place_type or in_place_index arguments.
2656
2657         * include/std/type_traits (unwrap_reference_t): Define for C++2a.
2658         (unwrap_ref_decay): Remove inheritance from unwrap_reference.
2659         * testsuite/20_util/unwrap_reference/1.cc: Adjust test to use alias.
2660
2661 2019-04-23  Ramana Radhakrishnan  <ramana.radhakrishnan@arm.com>
2662             Bernd Edlinger  <bernd.edlinger@hotmail.de>
2663             Jakub Jelinek  <jakub@redhat.com>
2664
2665         PR target/89093
2666         * libsupc++/eh_personality.cc (PERSONALITY_FUNCTION): Add
2667         general-regs-only target attribute for ARM.
2668
2669 2019-04-23  Jonathan Wakely  <jwakely@redhat.com>
2670
2671         PR libstdc++/87431
2672         * include/bits/basic_string.h (_Never_valueless_alt): Make partial
2673         specialization also depend on is_nothrow_move_constructible.
2674         * include/std/variant (__detail::__variant::__never_valueless()):
2675         Only true if the variant would have a move assignment operator.
2676         (__detail::__variant::_Variant_storage<false, T...>::_M_valid()):
2677         Check __never_valueless<T...>().
2678         (variant::emplace): Only perform non-throwing move assignments
2679         for never-valueless alternatives if the variant has a move assignment
2680         operator.
2681         * testsuite/20_util/variant/compile.cc: Check that never-valueless
2682         types can be emplaced into non-assignable variants.
2683         * testsuite/20_util/variant/run.cc: Check that never-valueless types
2684         don't get copied when emplaced into non-assignable variants.
2685
2686         * include/std/variant (__detail::__variant::__ref_cast): Remove
2687         unused function.
2688         (__detail::__variant::_Uninitialized::_M_get)
2689         (__detail::__variant::__get)
2690         (__gen_vtable_impl::__element_by_index_or_cookie): Add noexcept.
2691
2692 2019-04-21  Iain Sandoe  <iain@sandoe.co.uk>
2693
2694         * testsuite/17_intro/headers/c++1998/charset.cc: Skip for Darwin8
2695         to Darwin10.
2696         * testsuite/17_intro/headers/c++2011/charset.cc: Likewise.
2697         * testsuite/17_intro/headers/c++2014/charset.cc: Likewise.
2698         * testsuite/17_intro/headers/c++2017/charset.cc: Likewise.
2699         * testsuite/17_intro/headers/c++2020/charset.cc: Likewise.
2700
2701 2019-04-20  Thomas Rodgers <trodgers@redhat.com>
2702
2703         Delegate PSTL configuration to pstl/pstl_config.h
2704
2705         * include/bits/c++config: Remove explicit PSTL configuration
2706         macros and use definitions from <pstl/pstl_config.h>.
2707
2708 2019-04-20  Thomas Rodgers <trodgers@redhat.com>
2709
2710         Cleanup algorithm implementations
2711         * include/pstl/glue_algorithm_impl.h (stable_sort): Forward
2712         execution policy.
2713         (mismatch): Forward execution policy.
2714         (equal): Qualify call to std::equal().
2715         (partial_sort): Forward execution policy.
2716         (inplace_merge): Forward execution policy.
2717
2718 2019-04-19  Thomas Rodgers <trodgers@redhat.com>
2719
2720         Improve implementation of parallel equal()
2721         * include/pstl/algorithm_impl.h
2722         (__internal::__brick_equal): use "4 iterator" version of
2723         std::equal().
2724         (__internal::__brick_equal): use simd for random access
2725         iterators on unsequenced execution policies.
2726         (__internal::__pattern_equal): add "4 iterator" version
2727         (__internal::__pattern_equal): dispatch to simd __brick_equal
2728         for vector-only execution policies.
2729         (__internal::__pattern_equal): dispatch to __parallel_or for
2730         parallel execution policies.
2731         * include/pstl/glue_algorithm_impl.h
2732         (std::equal): dispatch to "4 iterator" version of
2733         __internal::__pattern_equal().
2734
2735 2019-04-17  Jonathan Wakely  <jwakely@redhat.com>
2736
2737         PR libstdc++/90105
2738         * include/bits/forward_list.h (operator==): Do not use operator!= to
2739         compare elements.
2740         (forward_list<T, A>::sort(Comp)): When elements are equal take the one
2741         earlier in the list, so that sort is stable.
2742         * testsuite/23_containers/forward_list/operations/90105.cc: New test.
2743         * testsuite/23_containers/forward_list/comparable.cc: Test with
2744         types that meet the minimum EqualityComparable and LessThanComparable
2745         requirements. Remove irrelevant comment.
2746
2747         * include/std/variant (__detail::__variant::_Traits::_S_copy_assign):
2748         Do not depend on whether all alternative types are move constructible.
2749         (__detail::__variant::_Copy_assign_base::operator=): Remove cv-quals
2750         from the operand when deciding whether to perform the assignment.
2751         * testsuite/20_util/variant/compile.cc (DeletedMoves): Define type
2752         with deleted move constructor and deleted move assignment operator.
2753         (default_ctor, copy_ctor, move_ctor, copy_assign, move_assign): Check
2754         behaviour of variants with DeletedMoves as an alternative.
2755         * testsuite/20_util/variant/run.cc (DeletedMoves): Define same type.
2756         (move_ctor, move_assign): Check that moving a variant with a
2757         DeletedMoves alternative falls back to copying instead of moving.
2758
2759         * testsuite/20_util/variant/compile.cc: Remove empty string literals
2760         from static_assert declarations.
2761
2762         * testsuite/20_util/variant/compile.cc (MoveCtorOnly): Fix type to
2763         actually match its name.
2764         (MoveCtorAndSwapOnly): Define new type that adds swap to MoveCtorOnly.
2765         (test_swap()): Fix result for MoveCtorOnly and check
2766         MoveCtorAndSwapOnly.
2767
2768         * include/std/optional (optional::value_or(U&&) &&): Add missing
2769         constexpr specifier.
2770         * testsuite/20_util/optional/constexpr/observers/4.cc: Check value_or
2771         for disengaged optionals and rvalue optionals.
2772         * testsuite/20_util/optional/observers/4.cc: Likewise.
2773
2774 2019-04-12  Thomas Rodgers  <trodgers@redhat.com>
2775
2776         * include/pstl/algorithm_impl.h: Uglify identfiers.
2777         * include/pstl/numeric_impl.h:  Uglify identfiers.
2778         * include/pstl/parallel_backend_tbb.h: Uglify identfiers.
2779
2780 2019-04-11  Thomas Rodgers  <trodgers@redhat.com>
2781
2782         * include/bits/c++config:
2783         Add definition for __PSTL_ASSERT.
2784         Add definition for __PSTL_ASSERT_MSG.
2785         * include/pstl/algorithm_impl.h: Replace use of assert().
2786         * include/pstl/numeric_impl.h: Replace use of assert().
2787         * include/pstl/parallel_backend_tbb.h:
2788         Replace use of assert().
2789         Replace use of __TBB_ASSERT().
2790         * include/pstl/parallel_backend_utils.h: Replace use of assert().
2791
2792 2019-04-11  Jonathan Wakely  <jwakely@redhat.com>
2793
2794         PR libstdc++/90046
2795         * src/c++17/memory_resource.cc
2796         (monotonic_buffer_resource::_Chunk::allocate): Increase alignment if
2797         needed to allow placing a _Chunk at the end of the buffer.
2798         (monotonic_buffer_resource::_M_new_buffer): Remove static_assert.
2799
2800 2019-04-10  Jonathan Wakely  <jwakely@redhat.com>
2801
2802         * doc/xml/faq.xml: Add information about emergency EH pool.
2803         * doc/xml/manual/debug.xml: Update list of memory debugging tools.
2804         Move outdated information on mt_allocator to a separate section.
2805         * doc/xml/manual/evolution.xml: Clarify that GLIBCXX_FORCE_NEW
2806         doesn't affect the default allocator.
2807
2808         * testsuite/lib/libstdc++.exp (check_v3_target_parallel_mode): Fix
2809         typo.
2810
2811         PR libstdc++/89851
2812         * testsuite/20_util/variant/89851.cc: New test.
2813
2814 2019-04-09  Jonathan Wakely  <jwakely@redhat.com>
2815
2816         * include/std/variant: Adjust whitespace. Add comments.
2817         (_Multi_array): Leave primary template undefined.
2818         (_Multi_array<_Tp>): Define partial specialization for base case of
2819         recursion.
2820         (__gen_vtable_impl, __gen_vtable): Remove redundant && from type
2821         which is always a reference.
2822         (__gen_vtable::_S_apply()): Remove function, inline body into
2823         default member initializer.
2824         * testsuite/20_util/variant/visit.cc: Test with noncopyable types.
2825
2826         * include/std/variant (__variant_idx_cookie): Add member type.
2827         (__visitor_result_type): Remove.
2828         (__do_visit): Use invoke_result instead of __visitor_result_type.
2829         * testsuite/20_util/variant/visit.cc: New test.
2830
2831         PR libstdc++/90008
2832         * include/std/variant (_VARIANT_RELATION_FUNCTION_TEMPLATE): Remove
2833         unused capture.
2834         * testsuite/20_util/variant/90008.cc: New test.
2835
2836 2019-04-09  Thomas Rodgers  <trodgers@redhat.com>
2837
2838         * include/pstl/algorithm_impl.h: Add namespace qualification.
2839         * include/pstl/execution_defs.h: Add namespace qualification.
2840         * include/pstl/execution_impl.h: Add namespace qualification.
2841         * include/pstl/numeric_impl.h: Add namespace qualification.
2842         * include/pstl/parallel_backend_tbb.h: Add namespace qualification.
2843         * include/pstl/unseq_backend_simd.h: Add namespace qualification.
2844         * include/pstl/parallel_backend_utils.h: Include <cassert>.
2845
2846 2019-04-08  Ville Voutilainen  <ville.voutilainen@gmail.com>
2847
2848         Fix visit<R> for variant.
2849         * include/std/variant (__do_visit): Add a template parameter
2850         for enforcing same return types for visit.
2851         (__gen_vtable_impl): Likewise.
2852         (_S_apply_single_alt): Adjust.
2853         (__visit_invoke_impl): New. Handle casting to void.
2854         (__do_visit_invoke): New. Enforces same return types.
2855         (__do_visit_invoke_r): New. Converts return types.
2856         (__visit_invoke): Adjust.
2857         (__gen_vtable):  Add a template parameter for enforcing
2858         same return types for visit.
2859         * testsuite/20_util/variant/visit_r.cc: Add a test for a visitor with
2860         different return types.
2861         * testsuite/20_util/variant/visit_neg.cc: New. Ensures that
2862         visitors with different return types don't accidentally
2863         compile with regular visitation.
2864
2865 2019-04-08  Christophe Lyon  <christophe.lyon@linaro.org>
2866
2867         * testsuite/27_io/filesystem/iterators/caching.cc: Add
2868         dg-require-filesystem-ts.
2869
2870 2019-04-05  Jonathan Wakely  <jwakely@redhat.com>
2871
2872         * doc/xml/manual/status_cxx2020.xml: Update status.
2873         * include/std/variant (visit<R>): Define for C++2a (P0655R1).
2874         * testsuite/20_util/variant/visit_r.cc: New test.
2875
2876         * include/bits/fs_dir.h (directory_iterator::operator*)
2877         (directory_iterator::operator->): Add noexcept.
2878         (operator==, operator!=): Replace namespace-scope equality operators
2879         for directory iterators with hidden friends.
2880
2881         PR libstdc++/89986
2882         * config/abi/pre/gnu.ver: Add missing exports.
2883         * testsuite/27_io/filesystem/iterators/directory_iterator.cc: Test
2884         increment member.
2885
2886         * config/abi/pre/gnu.ver: Export new symbols.
2887         * include/bits/fs_dir.h (recursive_directory_iterator::options())
2888         (recursive_directory_iterator::recursion_pending())
2889         (recursive_directory_iterator::disable_recursion_pending()): Remove
2890         inline definitions. Make noexcept.
2891         (recursive_directory_iterator::depth())
2892         (recursive_directory_iterator::operator*())
2893         (recursive_directory_iterator::operator->()): Make noexcept.
2894         (recursive_directory_iterator::_M_options)
2895         (recursive_directory_iterator::_M_pending): Remove data members.
2896         * src/c++17/fs_path.cc (_Dir_stack): Add constructor and data members.
2897         (recursive_directory_iterator::recursive_directory_iterator): Remove
2898         ctor-initializer. Use new constructor for _Dir_stack.
2899         (recursive_directory_iterator::options())
2900         (recursive_directory_iterator::recursion_pending())
2901         (recursive_directory_iterator::disable_recursion_pending()): Add
2902         non-inline definitions.
2903         (recursive_directory_iterator::depth()): Make noexcept.
2904         (recursive_directory_iterator::increment(error_code&))
2905         (recursive_directory_iterator::pop(error_code&)): Adjust to new
2906         location of options and recursion_pending members.
2907         * testsuite/27_io/filesystem/iterators/recursion_pending.cc: New test.
2908         * testsuite/util/testsuite_fs.h (__gnu_test::scoped_file): Add
2909         user-declared move constructor and assignment operator, to make the
2910         type move-only.
2911
2912         * src/c++17/fs_dir.cc (_Dir::advance(bool, error_code&)): Handle
2913         d_type == DT_UNKNOWN immediately.
2914         (_Dir::should_recurse(bool, error_code&)): Remove file_type::unknown
2915         handling here.
2916         * testsuite/27_io/filesystem/iterators/caching.cc: New test.
2917
2918         * include/bits/fs_path.h (path::operator=(path&&)): Check for self
2919         assignment.
2920         * src/c++17/fs_path.cc (path::operator=(const path&)): Likewise.
2921         * testsuite/27_io/filesystem/path/assign/copy.cc: Test self
2922         assignment.
2923
2924         PR libstdc++/87431 (again)
2925         * include/bits/basic_string.h (__variant::_Never_valueless_alt):
2926         Define partial specialization for basic_string.
2927         * include/bits/shared_ptr.h (_Never_valueless_alt): Likewise for
2928         shared_ptr and weak_ptr.
2929         * include/bits/std_function.h (_Never_valueless_alt): Likewise for
2930         function.
2931         * include/bits/stl_vector.h (_Never_valueless_alt): Likewise for
2932         vector.
2933         * include/bits/unique_ptr.h (_Never_valueless_alt): Likewise for
2934         unique_ptr.
2935         * include/debug/vector (_Never_valueless_alt): Likewise for debug
2936         vector.
2937         * include/std/any (_Never_valueless_alt): Define explicit
2938         specialization for any.
2939         * include/std/variant (_Never_valueless_alt): Define primary template.
2940         (__never_valueless): Use _Never_valueless_alt instead of
2941         is_trivially_copyable.
2942         (variant::emplace<N>(Args&&...)): Add special case for non-throwing
2943         initializations to avoid try-catch overhead. Add special case for
2944         scalars produced by potentially-throwing conversions. Use
2945         _Never_valueless_alt instead of is_trivially_copyable for the
2946         remaining strong exception-safety cases.
2947         (variant::emplace<N>(initializer_list<U>, Args&&...)): Likewise.
2948         * testsuite/20_util/variant/87431.cc: Run both test functions.
2949         * testsuite/20_util/variant/exception_safety.cc: New test.
2950         * testsuite/20_util/variant/run.cc: Use pmr::string instead of string,
2951         so the variant becomes valueless.
2952
2953 2019-04-03  Jonathan Wakely  <jwakely@redhat.com>
2954
2955         PR libstdc++/85184
2956         * include/std/variant (_Copy_assign_base, _Move_assign_base, variant):
2957         Remove assertions.
2958         (variant::emplace<_Tp>): Return result of emplace<N> directly.
2959
2960         * include/std/string (__hash_string_base): New class template defining
2961         operator() for hashing strings.
2962         (hash<pmr::string>, hash<pmr::u8string>, hash<pmr::u16string>)
2963         (hash<pmr::u32string>, hash<pmr::wstring>): Define for C++17.
2964         * testsuite/21_strings/basic_string/hash/hash.cc: New test.
2965         * testsuite/21_strings/basic_string/hash/hash_char8_t.cc: New test.
2966
2967 2019-04-01  Ville Voutilainen  <ville.voutilainen@gmail.com>
2968
2969         Use single-visitation in variant assignment and swap and relops.
2970         Also use indices instead of types when checking whether
2971         variants hold the same thing.
2972         * include/std/variant (__do_visit): Add a template parameter
2973         for index visitation, invoke with indices if index visitation
2974         is used.
2975         (__variant_idx_cookie): New.
2976         (__visit_with_index): Likewise.
2977         (_Copy_assign_base::operator=): Do single-visitation with
2978         an index visitor.
2979         (_Move_assign_base::operator=): Likewise.
2980         (_Extra_visit_slot_needed): Adjust.
2981         (__visit_invoke): Call with indices if it's an index visitor.
2982         (relops): Do single-visitation with an index visitor.
2983         (swap): Likewise.
2984         (__visitor_result_type): New.
2985
2986 2019-03-30  Eric Botcazou  <ebotcazou@adacore.com>
2987
2988         * src/c++17/fs_ops.cc (fs::permissions): Use std::errc::not_supported.
2989
2990 2019-03-28  Ville Voutilainen  <ville.voutilainen@gmail.com>
2991
2992         Don't revisit a variant we are already visiting.
2993         * include/std/variant (__variant_construct_single): New.
2994         (__variant_construct): Use it.
2995         (_M_destructive_move): Likewise.
2996         (_M_destructive_copy): Likewise.
2997         (_Copy_assign_base::operator=): Adjust.
2998         (_Move_assign_base::operator=): Likewise.
2999         (swap): Likewise.
3000
3001 2019-03-26  Jonathan Wakely  <jwakely@redhat.com>
3002
3003         PR libstdc++/85965
3004         * include/bits/hashtable.h (_Hashtable): Move static assertions to
3005         destructor so they are not evaluated until the _Key type is complete.
3006         * include/bits/stl_tree.h (_Rb_tree): Likewise.
3007         * testsuite/23_containers/set/85965.cc: New test.
3008         * testsuite/23_containers/unordered_set/85965.cc: New test.
3009         * testsuite/23_containers/map/48101_neg.cc: Replace "here" errors
3010         with regexp matching the corresponding _Rb_tree specialization.
3011         * testsuite/23_containers/multimap/48101_neg.cc: Likewise.
3012         * testsuite/23_containers/multiset/48101_neg.cc: Remove "here" error.
3013         * testsuite/23_containers/set/48101_neg.cc: Likewise.
3014         * testsuite/23_containers/unordered_map/48101_neg.cc: Likewise.
3015         * testsuite/23_containers/unordered_multimap/48101_neg.cc: Likewise.
3016         * testsuite/23_containers/unordered_multiset/48101_neg.cc: Likewise.
3017         * testsuite/23_containers/unordered_set/48101_neg.cc: Likewise.
3018
3019 2019-03-26  Ville Voutilainen  <ville.voutilainen@gmail.com>
3020
3021         PR libstdc++/89825
3022         Fix based on a suggestion by Antony Polukhin.
3023         * include/std/variant (__never_valueless): New.
3024         (_M_valid): Use it.
3025         (_Extra_visit_slot_needed): New.
3026         (_Multi_array): Use it.
3027         (_S_apply_all_alts): Likewise.
3028
3029 2019-03-26  Ville Voutilainen  <ville.voutilainen@gmail.com>
3030
3031         PR libstdc++/89824
3032         Fix based on a suggestion by Antony Polukhin.
3033         * include/std/variant (__gen_vtable): Don't reserve an
3034         additional table slot, _Multi_array already does that.
3035
3036 2019-03-26  Ville Voutilainen  <ville.voutilainen@gmail.com>
3037
3038         PR libstdc++/89816
3039         Fix based on a suggestion by Antony Polukhin.
3040         * include/std/variant (__variant_construct): Capture a pointer
3041         to the storage and visit just one variant.
3042
3043 2019-03-22  Jonathan Wakely  <jwakely@redhat.com>
3044
3045         * doc/xml/manual/backwards_compatibility.xml: Remove link to
3046         Doxygen-generated pages with unstable URL.
3047         * doc/xml/manual/concurrency_extensions.xml: Likewise.
3048         * doc/xml/manual/extensions.xml: Likewise.
3049         * doc/xml/manual/parallel_mode.xml: Likewise.
3050         * doc/xml/manual/support.xml: Likewise.
3051
3052         * include/bits/stl_algobase.h (__lg): Do arithmetic on type int to
3053         avoid -Wconversion warnings.
3054
3055 2019-03-21  Thomas Rodgers  <trodgers@redhat.com>
3056
3057         * include/Makefile.am (std_header): Add ${std_srcdir}/execution.
3058         (pstl_srcdir, pstl_builddir, pstl_headers): New variables.
3059         (allstamped): Add stamp-pstl.
3060         (install-headers): Add ptsl_builddir.
3061         * include/Makefile.in: Regenerate.
3062         * include/bits/c++config: Add pstl configuration.
3063         * include/pstl/LICENSE.txt: New file.
3064         * include/pstl/algorithm_fwd.h: New file.
3065         * include/pstl/algorithm_impl.h: New file.
3066         * include/pstl/execution_defs.h: New file.
3067         * include/pstl/execution_impl.h: New file.
3068         * include/pstl/glue_algorithm_defs.h: New file.
3069         * include/pstl/glue_algorithm_impl.h: New file.
3070         * include/pstl/glue_execution_defs.h: New file.
3071         * include/pstl/glue_memory_defs.h: New file.
3072         * include/pstl/glue_memory_impl.h: New file.
3073         * include/pstl/glue_numeric_defs.h: New file.
3074         * include/pstl/glue_numeric_impl.h: New file.
3075         * include/pstl/memory_impl.h: New file.
3076         * include/pstl/numeric_fwd.h: New file.
3077         * include/pstl/numeric_impl.h: New file.
3078         * include/pstl/parallel_backend.h: New file.
3079         * include/pstl/parallel_backend_tbb.h: New file.
3080         * include/pstl/parallel_backend_utils.h: New file.
3081         * include/pstl/parallel_impl.h: New file.
3082         * include/pstl/pstl_config.h: New file.
3083         * include/pstl/unseq_backend_simd.h: New file.
3084         * include/pstl/utils.h: New file.
3085         * include/std/algorithm: Include parallel algorithm implementations.
3086         * include/std/execution: New file.
3087         * include/std/memory: Include parallel algorithm implementations.
3088         * include/std/numeric: Include parallel algorithm implementations.
3089         * include/std/version: Add parallel algorithms feature test macro.
3090         * testsuite/util/pstl/pstl_test_config.h: New file.
3091         * testsuite/util/pstl/test_utils.h: New file.
3092         * testsuite/20_util/specialized_algorithms/pstl/uninitialized_construct.cc: New file.
3093         * testsuite/20_util/specialized_algorithms/pstl/uninitialized_copy_move.cc: New file.
3094         * testsuite/20_util/specialized_algorithms/pstl/uninitialized_fill_destroy.cc: New file.
3095         * testsuite/25_algorithms/pstl/alg_merge/inplace_merge.cc: New file.
3096         * testsuite/25_algorithms/pstl/alg_merge/merge.cc: New file.
3097         * testsuite/25_algorithms/pstl/alg_modifying_operations/copy_if.cc: New file.
3098         * testsuite/25_algorithms/pstl/alg_modifying_operations/copy_move.cc: New file.
3099         * testsuite/25_algorithms/pstl/alg_modifying_operations/fill.cc: New file.
3100         * testsuite/25_algorithms/pstl/alg_modifying_operations/generate.cc: New file.
3101         * testsuite/25_algorithms/pstl/alg_modifying_operations/is_partitioned.cc: New file.
3102         * testsuite/25_algorithms/pstl/alg_modifying_operations/partition.cc: New file.
3103         * testsuite/25_algorithms/pstl/alg_modifying_operations/partition_copy.cc: New file.
3104         * testsuite/25_algorithms/pstl/alg_modifying_operations/remove.cc: New file.
3105         * testsuite/25_algorithms/pstl/alg_modifying_operations/remove_copy.cc: New file.
3106         * testsuite/25_algorithms/pstl/alg_modifying_operations/replace.cc: New file.
3107         * testsuite/25_algorithms/pstl/alg_modifying_operations/replace_copy.cc: New file.
3108         * testsuite/25_algorithms/pstl/alg_modifying_operations/rotate.cc: New file.
3109         * testsuite/25_algorithms/pstl/alg_modifying_operations/rotate_copy.cc: New file.
3110         * testsuite/25_algorithms/pstl/alg_modifying_operations/swap_ranges.cc: New file.
3111         * testsuite/25_algorithms/pstl/alg_modifying_operations/transform_binary.cc: New file.
3112         * testsuite/25_algorithms/pstl/alg_modifying_operations/transform_unary.cc: New file.
3113         * testsuite/25_algorithms/pstl/alg_modifying_operations/unique.cc: New file.
3114         * testsuite/25_algorithms/pstl/alg_modifying_operations/unique_copy_equal.cc: New file.
3115         * testsuite/25_algorithms/pstl/alg_nonmodifying/adjacent_find.cc: New file.
3116         * testsuite/25_algorithms/pstl/alg_nonmodifying/all_of.cc: New file.
3117         * testsuite/25_algorithms/pstl/alg_nonmodifying/any_of.cc: New file.
3118         * testsuite/25_algorithms/pstl/alg_nonmodifying/count.cc: New file.
3119         * testsuite/25_algorithms/pstl/alg_nonmodifying/equal.cc: New file.
3120         * testsuite/25_algorithms/pstl/alg_nonmodifying/find.cc: New file.
3121         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_end.cc: New file.
3122         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_first_of.cc: New file.
3123         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_if.cc: New file.
3124         * testsuite/25_algorithms/pstl/alg_nonmodifying/for_each.cc: New file.
3125         * testsuite/25_algorithms/pstl/alg_nonmodifying/mismatch.cc: New file.
3126         * testsuite/25_algorithms/pstl/alg_nonmodifying/none_of.cc: New file.
3127         * testsuite/25_algorithms/pstl/alg_nonmodifying/nth_element.cc: New file.
3128         * testsuite/25_algorithms/pstl/alg_nonmodifying/reverse.cc: New file.
3129         * testsuite/25_algorithms/pstl/alg_nonmodifying/reverse_copy.cc: New file.
3130         * testsuite/25_algorithms/pstl/alg_nonmodifying/search_n.cc: New file.
3131         * testsuite/25_algorithms/pstl/alg_sorting/includes.cc: New file.
3132         * testsuite/25_algorithms/pstl/alg_sorting/is_heap.cc: New file.
3133         * testsuite/25_algorithms/pstl/alg_sorting/is_sorted.cc: New file.
3134         * testsuite/25_algorithms/pstl/alg_sorting/lexicographical_compare.cc: New file.
3135         * testsuite/25_algorithms/pstl/alg_sorting/minmax_element.cc: New file.
3136         * testsuite/25_algorithms/pstl/alg_sorting/partial_sort.cc: New file.
3137         * testsuite/25_algorithms/pstl/alg_sorting/partial_sort_copy.cc: New file.
3138         * testsuite/25_algorithms/pstl/alg_sorting/set.cc: New file.
3139         * testsuite/25_algorithms/pstl/alg_sorting/sort.cc: New file.
3140         * testsuite/26_numerics/pstl/numeric_ops/adjacent_difference.cc: New file.
3141         * testsuite/26_numerics/pstl/numeric_ops/reduce.cc: New file.
3142         * testsuite/26_numerics/pstl/numeric_ops/scan.cc: New file.
3143         * testsuite/26_numerics/pstl/numeric_ops/transform_reduce.cc: New file.
3144         * testsuite/26_numerics/pstl/numeric_ops/transform_scan.cc: New file.
3145         * testsuite/testsuite/20_util/specialized_algorithms/pstl/uninitialized_construct.cc: New file.
3146         * testsuite/testsuite/20_util/specialized_algorithms/pstl/uninitialized_copy_move.cc: New file.
3147         * testsuite/testsuite/20_util/specialized_algorithms/pstl/uninitialized_fill_destroy.cc: New file.
3148         * testsuite/testsuite/25_algorithms/pstl/alg_merge/inplace_merge.cc: New file.
3149         * testsuite/testsuite/25_algorithms/pstl/alg_merge/merge.cc: New file.
3150         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/copy_if.cc: New file.
3151         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/copy_move.cc: New file.
3152         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/fill.cc: New file.
3153         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/generate.cc: New file.
3154         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/is_partitioned.cc: New file.
3155         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/partition.cc: New file.
3156         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/partition_copy.cc: New file.
3157         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/remove.cc: New file.
3158         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/remove_copy.cc: New file.
3159         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/replace.cc: New file.
3160         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/replace_copy.cc: New file.
3161         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/rotate.cc: New file.
3162         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/rotate_copy.cc: New file.
3163         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/swap_ranges.cc: New file.
3164         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/transform_binary.cc: New file.
3165         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/transform_unary.cc: New file.
3166         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/unique.cc: New file.
3167         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/unique_copy_equal.cc: New file.
3168         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/adjacent_find.cc: New file.
3169         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/all_of.cc: New file.
3170         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/any_of.cc: New file.
3171         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/count.cc: New file.
3172         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/equal.cc: New file.
3173         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/find.cc: New file.
3174         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/find_end.cc: New file.
3175         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/find_first_of.cc: New file.
3176         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/find_if.cc: New file.
3177         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/for_each.cc: New file.
3178         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/mismatch.cc: New file.
3179         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/none_of.cc: New file.
3180         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/nth_element.cc: New file.
3181         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/reverse.cc: New file.
3182         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/reverse_copy.cc: New file.
3183         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/search_n.cc: New file.
3184         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/includes.cc: New file.
3185         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/is_heap.cc: New file.
3186         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/is_sorted.cc: New file.
3187         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/lexicographical_compare.cc: New file.
3188         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/minmax_element.cc: New file.
3189         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/partial_sort.cc: New file.
3190         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/partial_sort_copy.cc: New file.
3191         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/set.cc: New file.
3192         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/sort.cc: New file.
3193         * testsuite/testsuite/26_numerics/pstl/numeric_ops/adjacent_difference.cc: New file.
3194         * testsuite/testsuite/26_numerics/pstl/numeric_ops/reduce.cc: New file.
3195         * testsuite/testsuite/26_numerics/pstl/numeric_ops/scan.cc: New file.
3196         * testsuite/testsuite/26_numerics/pstl/numeric_ops/transform_reduce.cc: New file.
3197         * testsuite/testsuite/26_numerics/pstl/numeric_ops/transform_scan.cc: New file.
3198
3199 2019-03-21  Jonathan Wakely  <jwakely@redhat.com>
3200
3201         * include/c_compatibility/math.h [!__STDCPP_WANT_MATH_SPEC_FUNCS__]
3202         (assoc_laguerre, assoc_laguerref, assoc_laguerrel, assoc_legendre)
3203         (assoc_legendref, assoc_legendrel, beta, betaf, betal, comp_ellint_1)
3204         (comp_ellint_1f, comp_ellint_1l, comp_ellint_2, comp_ellint_2f)
3205         (comp_ellint_2l, comp_ellint_3, comp_ellint_3f, comp_ellint_3l)
3206         (cyl_bessel_i, cyl_bessel_if, cyl_bessel_il, cyl_bessel_j)
3207         (cyl_bessel_jf, cyl_bessel_jl, cyl_bessel_k, cyl_bessel_kf)
3208         (cyl_bessel_kl, cyl_neumann, cyl_neumannf, cyl_neumannl, ellint_1)
3209         (ellint_1f, ellint_1l, ellint_2, ellint_2f, ellint_2l, ellint_3)
3210         (ellint_3f, ellint_3l, expint, expintf, expintl, hermite, hermitef)
3211         (hermitel, laguerre, laguerref, laguerrel, legendre, legendref)
3212         (legendrel, riemann_zeta, riemann_zetaf, riemann_zetal, sph_bessel)
3213         (sph_besself, sph_bessell, sph_legendre, sph_legendref, sph_legendrel)
3214         (sph_neumann, sph_neumannf, sph_neumannl): Only add using-declarations
3215         when the special functions IS is enabled, not for C++17.
3216         * testsuite/26_numerics/headers/cmath/functions_global_c++17.cc:
3217         Replace with ...
3218         * testsuite/26_numerics/headers/cmath/functions_global.cc: New test,
3219         without checks for special functions in C++17.
3220         * testsuite/26_numerics/headers/cmath/special_functions_global.cc:
3221         New test.
3222
3223         PR libstdc++/88066
3224         * include/backward/hash_map: Use <> for includes not "".
3225         * include/backward/hash_set: Likewise.
3226         * include/backward/strstream: Likewise.
3227         * include/tr1/bessel_function.tcc: Likewise.
3228         * include/tr1/exp_integral.tcc: Likewise.
3229         * include/tr1/legendre_function.tcc: Likewise.
3230         * include/tr1/modified_bessel_func.tcc: Likewise.
3231         * include/tr1/riemann_zeta.tcc: Likewise.
3232
3233 2019-03-19  Jonathan Wakely  <jwakely@redhat.com>
3234
3235         * doc/xml/manual/allocator.xml: Link to table documenting evolution
3236         of extension allocators.
3237         * doc/xml/manual/evolution.xml: Use angle brackets for header names.
3238         Document new headers in 7.2, 8.1 and 9.1 releases.
3239         * doc/xml/manual/using.xml: Adjust link target for new_allocator.
3240         * doc/html/*: Regenerate.
3241
3242 2019-03-12  John David Anglin  <dave.anglin@bell.net>
3243
3244         PR libstdc++/89461
3245         * testsuite/lib/libstdc++.exp: Locate libatomic.
3246         * testsuite/lib/dg-options.exp (add_options_for_libatomic): New.
3247         * testsuite/20_util/shared_ptr/thread/default_weaktoshared.cc: Add
3248         libatomic options.
3249         * testsuite/20_util/shared_ptr/thread/mutex_weaktoshared.cc: Likewise.
3250         * testsuite/experimental/net/timer/waitable/cons.cc: Likewise.
3251         * testsuite/experimental/net/timer/waitable/dest.cc: Likewise.
3252         * testsuite/experimental/net/timer/waitable/ops.cc: Likewise.
3253
3254 2019-03-11  Jonathan Wakely  <jwakely@redhat.com>
3255
3256         PR libstdc++/89460
3257         * configure.ac: Check for sockatmark.
3258         * crossconfig.m4: Check for sockatmark.
3259         * config.h.in: Regenerate.
3260         * configure: Regenerate.
3261         * include/experimental/internet (address_v4::_S_hton): Rename
3262         overloaded functions to _S_hton_16 and _S_ntoh_16.
3263         (address_v4::_S_ntoh): Rename to _S_ntoh_16 and _S_ntoh_32.
3264         (basic_endpoint): Adjust calls to _S_hton and _S_ntoh.
3265         * include/experimental/socket (basic_socket::at_mark): Check
3266         _GLIBCXX_HAVE_SOCKATMARK.
3267
3268         * testsuite/29_atomics/atomic_flag/test_and_set/explicit-hle.cc: Use
3269         const variables instead of macros.
3270
3271         PR libstdc++/89629
3272         * libsupc++/hash_bytes.cc [__SIZEOF_SIZE_T__ == 8] (_Hash_bytes):
3273         Use correct type for len_aligned.
3274         * testsuite/20_util/hash/89629.cc: New test.
3275
3276 2019-03-11  Jakub Jelinek  <jakub@redhat.com>
3277
3278         PR libstdc++/89641
3279         * include/std/atomic (atomic<T>::store, atomic<T>::load,
3280         atomic<T>::exchange, atomic<T>::compare_exchange_weak,
3281         atomic<T>::compare_exchange_strong): Cast __m or __s and __f to int.
3282         * include/bits/atomic_base.h (__atomic_base<T>::operator++,
3283         __atomic_base<T>::operator--, __atomic_base<T>::operator+=,
3284         __atomic_base<T>::operator-=, __atomic_base<T>::operator&=,
3285         __atomic_base<T>::operator|=, __atomic_base<T>::operator^=,
3286         __atomic_base<T*>::operator++, __atomic_base<T*>::operator--,
3287         __atomic_base<T*>::operator+=, __atomic_base<T*>::operator-=): Cast
3288         memory_order_seq_cst to int.
3289
3290 2019-03-08  Jonathan Wakely  <jwakely@redhat.com>
3291
3292         * doc/xml/manual/using.xml: Use link element instead of xref.
3293         * doc/html/*: Regenerate.
3294
3295         * include/bits/fs_path.h (path::format): Add fixed underlying type.
3296
3297 2019-03-08  François Dumont  <fdumont@gcc.gnu.org>
3298
3299         PR libstdc++/89477
3300         * include/debug/map.h (map): Use _RequireNotAllocator to constrain
3301         parameters in deduction guides.
3302         * include/debug/multimap.h (multimap): Likewise.
3303         * include/debug/set.h (multimap): Likewise.
3304         * include/debug/multiset.h (multimap): Likewise.
3305         * include/debug/unordered_map (unordered_map): Likewise.
3306         (unordered_multimap): Likewise.
3307         * include/debug/unordered_set (unordered_set): Likewise.
3308         (unordered_multiset): Likewise.
3309
3310         PR libstdc++/89608
3311         * include/debug/unordered_map (unordered_map<>::_M_check_rehashed):
3312         Invalidate all iterators in case of rehash.
3313         (unordered_multimap<>::_M_check_rehashed): Likewise.
3314         * include/debug/unordered_set
3315         (unordered_set<>::_M_check_rehashed): Likewise.
3316         (unordered_multiset<>::_M_check_rehashed): Likewise.
3317         * testsuite/23_containers/unordered_set/debug/89608_neg.cc: New.
3318
3319 2019-03-07  Andreas Schwab  <schwab@suse.de>
3320
3321         * config/abi/post/riscv64-linux-gnu: New directory.
3322         * config/abi/post/riscv64-linux-gnu/baseline_symbols.txt: New file.
3323
3324 2019-03-07  Jonathan Wakely  <jwakely@redhat.com>
3325
3326         * testsuite/20_util/function_objects/bind_front/1.cc: Change from
3327         compile test to run. Fix typo.
3328
3329         * doc/xml/manual/status_cxx2020.xml: Update C++20 status.
3330         * doc/html/*: Regenerate.
3331
3332         P0356R5 Simplified partial function application
3333         * include/std/functional [C++20] (_Bind_front, _Bind_front_t): Define
3334         helpers for bind_front.
3335         (bind_front, __cpp_lib_bind_front): Define.
3336         * testsuite/20_util/function_objects/bind_front/1.cc: New test.
3337
3338 2019-03-06  Jonathan Wakely  <jwakely@redhat.com>
3339
3340         * include/std/type_traits (__cpp_lib_bounded_array_traits): Define.
3341         * include/std/version (__cpp_lib_bounded_array_traits): Likewise.
3342         * testsuite/20_util/is_bounded_array/value.cc: Check for macro.
3343         * testsuite/20_util/is_unbounded_array/value.cc: Likewise.
3344
3345 2019-03-06  Edward Smith-Rowland  <3dw4rd@verizon.net>
3346
3347         PR libstdc++/86655 - std::assoc_legendre should not constrain
3348         the value of m (or x).
3349         * include/tr1/legendre_function.tcc (__assoc_legendre_p,
3350         __sph_legendre): If degree > order Don't throw, return 0.
3351         (__legendre_p, __assoc_legendre_p): Don't constrain x either.
3352         * testsuite/special_functions/02_assoc_legendre/pr86655.cc: New test.
3353         * testsuite/special_functions/20_sph_legendre/pr86655.cc: New test.
3354         * testsuite/tr1/5_numerical_facilities/special_functions/
3355         02_assoc_legendre/pr86655.cc: New test.
3356         * testsuite/tr1/5_numerical_facilities/special_functions/
3357         22_sph_legendre/pr86655.cc: New test.
3358
3359 2019-03-06  Ville Voutilainen  <ville.voutilainen@gmail.com>
3360
3361         Rewrite variant.
3362         Also PR libstdc++/85517
3363         * include/std/variant (__do_visit): New.
3364         (__variant_cast): Likewise.
3365         (__variant_cookie): Likewise.
3366         (__erased_*): Remove.
3367         (_Variant_storage::_S_vtable): Likewise.
3368         (_Variant_storage::__M_reset_impl): Adjust to use __do_visit.
3369         (_Variant_storage::__M_reset): Adjust.
3370         (__variant_construct): New.
3371         (_Copy_ctor_base(const _Copy_ctor_base&)): Adjust to use
3372         __variant_construct.
3373         (_Move_ctor_base(_Move_ctor_base&&)): Likewise.
3374         (_Move_ctor_base::__M_destructive_copy): New.
3375         (_Move_ctor_base::__M_destructive_move): Adjust to use
3376         __variant_construct.
3377         (_Copy_assign_base::operator=): Adjust to use __do_visit.
3378         (_Copy_assign_alias): Adjust to check both copy assignment
3379         and copy construction for triviality.
3380         (_Move_assign_base::operator=): Adjust to use __do_visit.
3381         (_Multi_array): Add support for visitors that accept and return
3382         a __variant_cookie.
3383         (__gen_vtable_impl::_S_apply_all_alts): Likewise.
3384         (__gen_vtable_impl::_S_apply_single_alt): Likewise.
3385         (__gen_vtable_impl::__element_by_index_or_cookie): New. Generate
3386         a __variant_cookie temporary for a variant that is valueless and..
3387         (__gen_vtable_impl::__visit_invoke): ..adjust here.
3388         (__gen_vtable::_Array_type): Conditionally make space for
3389         the __variant_cookie visitor case.
3390         (__variant_construct_by_index): New.
3391         (get_if): Adjust to use std::addressof.
3392         (relops): Adjust to use __do_visit.
3393         (variant): Add __variant_cast and __variant_construct_by_index
3394         as friends.
3395         (variant::emplace): Use _M_reset() and __variant_construct_by_index
3396         instead of self-destruction.
3397         (variant::swap): Adjust to use __do_visit.
3398         (visit): Reimplement in terms of __do_visit.
3399         (__variant_hash_call_base_impl::operator()): Adjust to use __do_visit.
3400         * testsuite/20_util/variant/compile.cc: Adjust.
3401         * testsuite/20_util/variant/run.cc: Likewise.
3402
3403 2019-03-06  Jonathan Wakely  <jwakely@redhat.com>
3404
3405         * include/bits/c++config.h (_cpp_lib_char8_t): Add L suffix to
3406         constant.
3407         * testsuite/experimental/feat-char8_t.cc: Likewise.
3408
3409          * include/std/type_traits [C++20] (is_bounded_array)
3410          (is_unbounded_array, is_bounded_array_v, is_unbounded_array_v):
3411          Define.
3412          * testsuite/20_util/is_bounded_array/requirements/
3413          explicit_instantiation.cc: New test.
3414          * testsuite/20_util/is_bounded_array/requirements/typedefs.cc: New
3415          test.
3416          * testsuite/20_util/is_bounded_array/value.cc: New test.
3417          * testsuite/20_util/is_unbounded_array/requirements/
3418          explicit_instantiation.cc: New test.
3419          * testsuite/20_util/is_unbounded_array/requirements/typedefs.cc: New
3420          * test.
3421          * testsuite/20_util/is_unbounded_array/value.cc: New test.
3422
3423         * include/bits/ptr_traits.h [C++20] (pointer_traits<T*>::pointer_to):
3424         Add constexpr.
3425         * testsuite/20_util/pointer_traits/pointer_to_constexpr.cc: New test.
3426
3427 2019-03-05  Jonathan Wakely  <jwakely@redhat.com>
3428
3429         * include/c_compatibility/math.h [C++20] (lerp): Add using
3430         declaration.
3431         * include/c_global/cmath [C++20] (__cpp_lib_interpolate): Define.
3432         (__lerp): Define function template to implement lerp.
3433         (lerp(float, float, float), lerp(double, double, double))
3434         (lerp(long double, long double, long double)): Define for C++20.
3435         * include/std/numeric [C++20] (__cpp_lib_interpolate): Define.
3436         (midpoint(T, T), midpoint(T*, T*)): Define.
3437         * include/std::version [C++20] (__cpp_lib_interpolate): Define.
3438         * testsuite/26_numerics/lerp.cc: New test.
3439         * testsuite/26_numerics/midpoint/floating.cc: New test.
3440         * testsuite/26_numerics/midpoint/integral.cc: New test.
3441         * testsuite/26_numerics/midpoint/pointer.cc: New test.
3442
3443 2019-03-04  Edward Smith-Rowland  <3dw4rd@verizon.net>
3444
3445         PR libstdc++/88996 Implement P0439R0
3446         Make std::memory_order a scoped enumeration.
3447         * include/bits/atomic_base.h: For C++20 make memory_order a scoped enum,
3448         add variables for the old enumerators.  Adjust calls.
3449         * testsuite/29_atomics/headers/atomic/types_std_c++2a.cc: New test.
3450         * testsuite/29_atomics/headers/atomic/types_std_c++2a_neg.cc: New test.
3451
3452 2019-03-04  Jonathan Wakely  <jwakely@redhat.com>
3453
3454         * testsuite/26_numerics/bit/bitops.rot/rotl.cc: Remove bogus dg-do
3455         directive.
3456
3457         * include/std/memory_resource (polymorphic_allocator): Add default
3458         template argument for C++20.
3459         (polymorphic_allocator::allocate_bytes)
3460         (polymorphic_allocator::deallocate_bytes)
3461         (polymorphic_allocator::allocate_object)
3462         (polymorphic_allocator::deallocate_object)
3463         (polymorphic_allocator::new_object)
3464         (polymorphic_allocator::delete_object): New member functions for
3465         C++20.
3466         * testsuite/20_util/polymorphic_allocator/allocate_object.cc: New
3467         test.
3468
3469 2019-03-03  Jonathan Wakely  <jwakely@redhat.com>
3470
3471         PR libstdc++/89562
3472         * src/filesystem/ops-common.h (do_copy_file): Open files in binary
3473         mode for mingw.
3474
3475 2019-03-01  Jonathan Wakely  <jwakely@redhat.com>
3476
3477         * testsuite/util/testsuite_allocator.h (__gnu_test::memory_resource)
3478         [!__cpp_sized_deallocation]: Do not pass size to operator delete.
3479
3480         * include/std/memory (uses_allocator_construction_args): New set of
3481         overloaded functions.
3482         (make_obj_using_allocator, uninitialized_construct_using_allocator):
3483         New functions.
3484         * include/std/memory_resource (polymorphic_allocator::construct)
3485         [__cplusplus > 201703l]: Replace all overloads with a single function
3486         using uses_allocator_construction_args.
3487         * testsuite/20_util/polymorphic_allocator/construct_c++2a.cc: New
3488         test.
3489         * testsuite/20_util/uses_allocator/make_obj.cc: New test.
3490
3491 2019-02-27  Jonathan Wakely  <jwakely@redhat.com>
3492
3493         PR libstdc++/89466
3494         * acinclude.m4 (GLIBCXX_CONFIGURE_DOCBOOK): Reorder check for local
3495         stylesheet directories before check for xsltproc. Try to use
3496         xmlcatalog to find local stylesheet directory before trying hardcoded
3497         paths. Add path used by suse to hardcoded paths. Adjust xsltproc
3498         check to look for the same stylesheet as doc/Makefile.am uses. Don't
3499         use xsltproc if xmlcatalog fails to find a local stylesheet.
3500         * configure.ac: Check for xmlcatalog.
3501         * Makefile.in: Regenerate.
3502         * configure: Likewise.
3503         * doc/Makefile.in: Likewise.
3504         * include/Makefile.in: Likewise.
3505         * libsupc++/Makefile.in: Likewise.
3506         * po/Makefile.in: Likewise.
3507         * python/Makefile.in: Likewise.
3508         * src/Makefile.in: Likewise.
3509         * src/c++11/Makefile.in: Likewise.
3510         * src/c++17/Makefile.in: Likewise.
3511         * src/c++98/Makefile.in: Likewise.
3512         * src/filesystem/Makefile.in: Likewise.
3513         * testsuite/Makefile.in: Likewise.
3514
3515 2019-02-26  Jonathan Wakely  <jwakely@redhat.com>
3516
3517         PR libstdc++/89477
3518         * include/bits/alloc_traits.h (_RequireNotAllocator): New helper for
3519         container deduction guides.
3520         * include/bits/hashtable.h (_RequireNotAllocatorOrIntegral): Likewise.
3521         * include/bits/stl_map.h (map): Use _RequireNotAllocator to constrain
3522         parameters in deduction guides.
3523         * include/bits/stl_multimap.h (multimap): Likewise.
3524         * include/bits/stl_multiset.h (multiset): Likewise.
3525         * include/bits/stl_queue.h (queue, priority_queue): Likewise.
3526         * include/bits/stl_set.h (set): Likewise.
3527         * include/bits/stl_stack.h (stack): Likewise.
3528         * include/bits/unordered_map.h (unordered_map, unordered_multimap):
3529         use _RequireNotAllocator and _RequireNotAllocatorOrIntegral to
3530         constrain parameters in deduction guides.
3531         * include/bits/unordered_set.h (unordered_set, unordered_multiset):
3532         Likewise.
3533         * testsuite/23_containers/map/cons/deduction.cc: Test additional
3534         deduction cases.
3535         * testsuite/23_containers/multiset/cons/deduction.cc: Likewise.
3536         * testsuite/23_containers/set/cons/deduction.cc: Likewise.
3537         * testsuite/23_containers/unordered_map/cons/deduction.cc: Likewise.
3538         * testsuite/23_containers/unordered_multimap/cons/deduction.cc:
3539         Likewise.
3540         * testsuite/23_containers/unordered_multiset/cons/deduction.cc:
3541         Likewise.
3542         * testsuite/23_containers/unordered_set/cons/deduction.cc: Likewise.
3543
3544         PR libstdc++/89416
3545         * include/bits/alloc_traits.h (__is_alloc_insertable_impl): Change
3546         to class template and partial specialization using void_t.
3547         (__is_copy_insertable, __is_move_insertable): Adjust base class.
3548
3549 2019-02-24  Jonathan Wakely  <jwakely@redhat.com>
3550
3551         PR libstdc++/89416
3552         * include/bits/alloc_traits.h (__is_alloc_insertable_impl): Make
3553         copy and move members public.
3554
3555 2019-02-23  Jonathan Wakely  <jwakely@redhat.com>
3556
3557         * include/std/type_traits (__underlying_type_impl): New helper to
3558         make underlying_type SFINAE-friendly.
3559         (underlying_type): Derive from __underlying_type_impl.
3560         * testsuite/20_util/underlying_type/requirements/typedefs-3.cc: New
3561         test.
3562
3563         PR libstdc++/89446
3564         * include/bits/char_traits.h (__constant_char_array): Check index is
3565         in range before dereferencing.
3566         (char_traits<char>::compare, char_traits<char>::find)
3567         (char_traits<char8_t>::compare, char_traits<char8_t>::find): Return
3568         immediately if n is zero.
3569         (char_traits<wchar_t>::compare, char_traits<wchar_t>::find): Likewise.
3570         Remove workarounds for PR 67026.
3571         * testsuite/21_strings/basic_string_view/operators/char/89446.cc:
3572         New test.
3573         * testsuite/21_strings/basic_string_view/operators/wchar_t/89446.cc:
3574         New test.
3575
3576 2019-02-22  Eric Botcazou  <ebotcazou@adacore.com>
3577
3578         * config/abi/post/sparc64-linux-gnu/baseline_symbols.txt: Adjust.
3579         * config/abi/post/sparc64-linux-gnu/32/baseline_symbols.txt: Likewise.
3580
3581 2019-02-22  Jakub Jelinek  <jakub@redhat.com>
3582
3583         PR libstdc++/89402
3584         * src/c++98/compatibility-ldbl.cc (_ZNKSt4hashIeEclEe): Change return
3585         type to std::size_t and argument to type to long double.
3586
3587 2019-02-22  Eric Botcazou  <ebotcazou@adacore.com>
3588
3589         * configure.host (abi_baseline_pair): Adjust for SPARC64/Linux.
3590         * config/abi/post/sparc64-linux-gnu: New directory.
3591         * config/abi/post/sparc64-linux-gnu/baseline_symbols.txt: New file.
3592         * config/abi/post/sparc64-linux-gnu/32: New directory.
3593         * config/abi/post/sparc64-linux-gnu/32/baseline_symbols.txt: New file.
3594
3595 2019-02-21  Jonathan Wakely  <jwakely@redhat.com>
3596
3597         * testsuite/29_atomics/headers/atomic/types_std_c++20.cc: New test.
3598         * testsuite/29_atomics/headers/atomic/types_std_c++20_neg.cc: New
3599         test.
3600
3601 2019-02-22  Tom Honermann  <tom@honermann.net>
3602
3603         * python/libstdcxx/v6/printers.py (register_type_printers): Add type
3604         printers for u8string and u8string_view.
3605
3606 2019-02-22  Tom Honermann  <tom@honermann.net>
3607
3608         * testsuite/18_support/byte/ops.cc: Validate
3609         std::to_integer<char8_t>, std::to_integer<char16_t>, and
3610         std::to_integer<char32_t>.
3611         * testsuite/18_support/numeric_limits/dr559.cc: Validate
3612         std::numeric_limits<char8_t>.
3613         * testsuite/18_support/numeric_limits/lowest.cc: Validate
3614         std::numeric_limits<char8_t>::lowest().
3615         * testsuite/18_support/numeric_limits/max_digits10.cc: Validate
3616         std::numeric_limits<char8_t>::max_digits10.
3617         * testsuite/18_support/type_info/fundamental.cc: Validate
3618         typeinfo for char8_t.
3619         * testsuite/20_util/from_chars/1_c++20_neg.cc: New test, validating
3620         std::from_chars with char8_t.
3621         * testsuite/20_util/hash/requirements/explicit_instantiation.cc:
3622         Validate explicit instantiation of std::hash<char8_t>.
3623         * testsuite/20_util/is_integral/value.cc: Validate
3624         std::is_integral<char8_t>.
3625         * testsuite/20_util/make_signed/requirements/typedefs-4.cc:
3626         Validate std::make_signed<char8_t>.
3627         * testsuite/21_strings/basic_string/cons/char/deduction.cc:
3628         Validate u8string construction from char8_t sources.
3629         * testsuite/21_strings/basic_string/types/pmr_typedefs.cc: Validate
3630         std::pmr::u8string.
3631         * testsuite/21_strings/basic_string_view/operations/compare/
3632         char/70483.cc: Validate substr operations on u8string_view.
3633         * testsuite/21_strings/basic_string_view/typedefs.cc: Validate that
3634         the u8string_view typedef is defined.
3635         * testsuite/21_strings/char_traits/requirements/
3636         constexpr_functions.cc: Validate char_traits<char8_t> constexpr
3637         member functions.
3638         * testsuite/21_strings/char_traits/requirements/
3639         constexpr_functions_c++17.cc: Validate char_traits<char8_t> C++17
3640         constexpr member functions.
3641         * testsuite/21_strings/headers/string/types_std_c++0x.cc: Validate
3642         that the u8string typedef is defined.
3643         * testsuite/22_locale/locale/cons/unicode.cc: Validate the presence
3644         of the std::codecvt<char16_t, char8_t, std::mbstate_t> and
3645         std::codecvt<char32_t, char8_t, std::mbstate_t> facets.
3646         * testsuite/29_atomics/atomic/cons/assign_neg.cc: Update line
3647         numbers.
3648         * testsuite/29_atomics/atomic/cons/copy_neg.cc: Likewise.
3649         * testsuite/29_atomics/atomic_integral/cons/assign_neg.cc:
3650         Likewise.
3651         * testsuite/29_atomics/atomic_integral/cons/copy_neg.cc: Likewise.
3652         * testsuite/29_atomics/atomic_integral/is_always_lock_free.cc:
3653         Validate std::atomic<char8_t>::is_always_lock_free
3654         * testsuite/29_atomics/atomic_integral/operators/bitwise_neg.cc:
3655         Update line numbers.
3656         * testsuite/29_atomics/atomic_integral/operators/decrement_neg.cc:
3657         Likewise.
3658         * testsuite/29_atomics/atomic_integral/operators/increment_neg.cc:
3659         Likewise.
3660         * testsuite/experimental/polymorphic_allocator/pmr_typedefs_string.cc:
3661         Validate std::experimental::pmr::u8string.
3662         * testsuite/experimental/string_view/typedefs.cc: Validate that the
3663         u8string_view typedef is defined.
3664         * testsuite/util/testsuite_common_types.h: Add char8_t, char16_t and
3665         char32_t to the typelists.
3666
3667 2019-02-22  Tom Honermann  <tom@honermann.net>
3668
3669         * include/ext/typelist.h: Constrain a partial specialization of
3670         typelist::detail::append_ to only match chain<T1,T2>.
3671
3672 2019-02-21  Jonathan Wakely  <jwakely@redhat.com>
3673
3674         PR libstdc++/89416
3675         * include/bits/alloc_traits.h (__is_alloc_insertable_impl): Replace
3676         class template with class. Replace move and copy member types with
3677         member alias templates, so they are only instantiated when needed.
3678         (__is_copy_insertable, __is_move_insertable): Adjust base class.
3679         * testsuite/23_containers/vector/modifiers/push_back/89130.cc: Enable
3680         test for C++11/14/17 as well.
3681         * testsuite/23_containers/vector/modifiers/push_back/89416.cc: New
3682         test.
3683
3684 2019-02-20  Jakub Jelinek  <jakub@redhat.com>
3685
3686         PR libstdc++/89402
3687         * src/c++98/compatibility-ldbl.cc (_ZNKSt4hashIeEclEe): Add
3688         _GLIBCXX_PURE to the alias declaration.
3689
3690 2019-02-19  Jonathan Wakely  <jwakely@redhat.com>
3691
3692         * testsuite/21_strings/basic_string/literals/types.cc
3693         [_GLIBCXX_USE_CHAR8_T]: Adjust expected string type for u8 literal.
3694         * testsuite/21_strings/basic_string/literals/values.cc
3695         [_GLIBCXX_USE_CHAR8_T]: Likewise.
3696         * testsuite/22_locale/codecvt/char16_t.cc: Adjust for u8 literals
3697         potentially having different type.
3698         * testsuite/22_locale/codecvt/char32_t.cc: Likewise.
3699         * testsuite/22_locale/codecvt/codecvt_utf8/79980.cc: Cast u8 literal
3700         to char.
3701         * testsuite/22_locale/codecvt/codecvt_utf8/wchar_t/1.cc: Likewise.
3702         * testsuite/22_locale/codecvt/utf8.cc: Likewise.
3703         * testsuite/22_locale/conversions/string/2.cc: Remove u8 prefix from
3704         string literals only using basic character set.
3705         * testsuite/22_locale/conversions/string/3.cc: Likewise. Cast other
3706         u8 literals to char.
3707         * testsuite/29_atomics/headers/atomic/macros.cc [_GLIBCXX_USE_CHAR8_T]:
3708         Test ATOMIC_CHAR8_T_LOCK_FREE.
3709         Add missing #error to ATOMIC_CHAR16_T_LOCK_FREE test.
3710         * testsuite/29_atomics/headers/atomic/types_std_c++0x.cc
3711         [_GLIBCXX_USE_CHAR8_T]: Check for std::atomic_char8_t.
3712         * testsuite/experimental/string_view/literals/types.cc
3713         [_GLIBCXX_USE_CHAR8_T]: Adjust expected string_view type for u8
3714         literal.
3715         * testsuite/experimental/string_view/literals/values.cc
3716         [_GLIBCXX_USE_CHAR8_T]: Likewise.
3717
3718 2019-02-19  Tom Honermann  <tom@honermann.net>
3719
3720         * testsuite/18_support/numeric_limits/char8_t.cc: New test cloned
3721         from char16_32_t.cc; validates numeric_limits<char8_t>.
3722         * testsuite/21_strings/basic_string/literals/types-char8_t.cc: New
3723         test cloned from types.cc; validates operator""s for char8_t
3724         returns u8string.
3725         * testsuite/21_strings/basic_string/literals/values-char8_t.cc: New
3726         test cloned from values.cc; validates construction and comparison
3727         of u8string values.
3728         * testsuite/21_strings/basic_string/requirements/
3729         /explicit_instantiation/char8_t/1.cc: New test cloned from
3730         char16_t/1.cc; validates explicit instantiation of
3731         basic_string<char8_t>.
3732         * testsuite/21_strings/basic_string_view/literals/types-char8_t.cc:
3733         New test cloned from types.cc; validates operator""sv for char8_t
3734         returns u8string_view.
3735         * testsuite/21_strings/basic_string_view/literals/
3736         values-char8_t.cc: New test cloned from values.cc; validates
3737         construction and comparison of u8string_view values.
3738         * testsuite/21_strings/basic_string_view/requirements/
3739         explicit_instantiation/char8_t/1.cc: New test cloned from
3740         char16_t/1.cc; validates explicit instantiation of
3741         basic_string_view<char8_t>.
3742         * testsuite/21_strings/char_traits/requirements/char8_t/65049.cc:
3743         New test cloned from char16_t/65049.cc; validates that
3744         char_traits<char8_t> is not vulnerable to the concerns in PR65049.
3745         * testsuite/21_strings/char_traits/requirements/char8_t/
3746         typedefs.cc: New test cloned from char16_t/typedefs.cc; validates
3747         that char_traits<char8_t> member typedefs are present and correct.
3748         * testsuite/21_strings/char_traits/requirements/
3749         explicit_instantiation/char8_t/1.cc: New test cloned from
3750         char16_t/1.cc; validates explicit instantiation of
3751         char_traits<char8_t>.
3752         * testsuite/22_locale/codecvt/char16_t-char8_t.cc: New test cloned
3753         from char16_t.cc: validates
3754         codecvt<char16_t, char8_t, mbstate_t>.
3755         * testsuite/22_locale/codecvt/char32_t-char8_t.cc: New test cloned
3756         from char32_t.cc: validates
3757         codecvt<char32_t, char8_t, mbstate_t>.
3758         * testsuite/22_locale/codecvt/utf8-char8_t.cc: New test cloned from
3759         utf8.cc; validates codecvt<char16_t, char8_t, std::mbstate_t> and
3760         codecvt<char32_t, char8_t, std::mbstate_t>.
3761         * testsuite/27_io/filesystem/path/native/string-char8_t.cc: New
3762         test cloned from string.cc; validates filesystem::path construction
3763         from char8_t input.
3764         * testsuite/experimental/feat-char8_t.cc: New test; validates that
3765         the __cpp_lib_char8_t feature test macro is defined with the
3766         correct value.
3767         * testsuite/experimental/filesystem/path/native/string-char8_t.cc:
3768         New test cloned from string.cc; validates filesystem::path
3769         construction from char8_t input.
3770         * testsuite/experimental/string_view/literals/types-char8_t.cc: New
3771         test cloned from types.cc; validates operator""sv for char8_t
3772         returns u8string_view.
3773         * testsuite/experimental/string_view/literals/values-char8_t.cc:
3774         New test cloned from values.cc; validates construction and
3775         comparison of u8string_view values.
3776         * testsuite/experimental/string_view/requirements/
3777         explicit_instantiation/char8_t/1.cc: New test cloned from
3778         char16_t/1.cc; validates explicit instantiation of
3779         basic_string_view<char8_t>.
3780         * testsuite/ext/char8_t/atomic-1.cc: New test; validates that
3781         ATOMIC_CHAR8_T_LOCK_FREE is not defined if char8_t support is not
3782         enabled.
3783
3784 2019-02-19  Tom Honermann  <tom@honermann.net>
3785
3786         P0482R5 char8_t: Standard library support
3787         * config/abi/pre/gnu-versioned-namespace.ver (CXXABI_2.0): Add
3788         typeinfo symbols for char8_t.
3789         * config/abi/pre/gnu.ver: Add CXXABI_1.3.12.
3790         (GLIBCXX_3.4.26): Add symbols for specializations of
3791         numeric_limits and codecvt that involve char8_t.
3792         (CXXABI_1.3.12): Add typeinfo symbols for char8_t.
3793         * include/bits/atomic_base.h: Add atomic_char8_t.
3794         * include/bits/basic_string.h: Add std::hash<u8string> and
3795         operator""s(const char8_t*, size_t).
3796         * include/bits/c++config: Define _GLIBCXX_USE_CHAR8_T and
3797         __cpp_lib_char8_t.
3798         * include/bits/char_traits.h: Add char_traits<char8_t>.
3799         * include/bits/codecvt.h: Add
3800         codecvt<char16_t, char8_t, mbstate_t>,
3801         codecvt<char32_t, char8_t, mbstate_t>,
3802         codecvt_byname<char16_t, char8_t, mbstate_t>, and
3803         codecvt_byname<char32_t, char8_t, mbstate_t>.
3804         * include/bits/cpp_type_traits.h: Add __is_integer<char8_t> to
3805         recognize char8_t as an integral type.
3806         * include/bits/fs_path.h: (path::__is_encoded_char): Recognize
3807         char8_t.
3808         (path::u8string): Return std::u8string when char8_t support is
3809         enabled.
3810         (path::generic_u8string): Likewise.
3811         (path::_S_convert): Handle conversion from char8_t input.
3812         (path::_S_str_convert): Likewise.
3813         * include/bits/functional_hash.h: Add hash<char8_t>.
3814         * include/bits/locale_conv.h (__str_codecvt_out): Add overloads for
3815         char8_t.
3816         * include/bits/locale_facets.h (_GLIBCXX_NUM_UNICODE_FACETS): Bump
3817         for new char8_t specializations.
3818         * include/bits/localefwd.h: Add missing declarations of
3819         codecvt<char16_t, char, mbstate_t> and
3820         codecvt<char32_t, char, mbstate_t>.  Add char8_t declarations
3821         codecvt<char16_t, char8_t, mbstate_t> and
3822         codecvt<char32_t, char8_t, mbstate_t>.
3823         * include/bits/postypes.h: Add u8streampos
3824         * include/bits/stringfwd.h: Add declarations of
3825         char_traits<char8_t> and u8string.
3826         * include/c_global/cstddef: Add __byte_operand<char8_t>.
3827         * include/experimental/bits/fs_path.h (path::__is_encoded_char):
3828         Recognize char8_t.
3829         (path::u8string): Return std::u8string when char8_t support is
3830         enabled.
3831         (path::generic_u8string): Likewise.
3832         (path::_S_convert): Handle conversion from char8_t input.
3833         (path::_S_str_convert): Likewise.
3834         * include/experimental/string: Add u8string.
3835         * include/experimental/string_view: Add u8string_view,
3836         hash<experimental::u8string_view>, and
3837         operator""sv(const char8_t*, size_t).
3838         * include/std/atomic: Add atomic<char8_t> and atomic_char8_t.
3839         * include/std/charconv (__is_int_to_chars_type): Recognize char8_t
3840         as a character type.
3841         * include/std/limits: Add numeric_limits<char8_t>.
3842         * include/std/string_view: Add u8string_view,
3843         hash<experimental::u8string_view>, and
3844         operator""sv(const char8_t*, size_t).
3845         * include/std/type_traits: Add __is_integral_helper<char8_t>,
3846         __make_unsigned<char8_t>, and __make_signed<char8_t>.
3847         * libsupc++/atomic_lockfree_defines.h: Define
3848         ATOMIC_CHAR8_T_LOCK_FREE.
3849         * src/c++11/Makefile.am: Compile with -fchar8_t when compiling
3850         codecvt.cc and limits.cc so that char8_t specializations of
3851         numeric_limits and codecvt and emitted.
3852         * src/c++11/Makefile.in: Likewise.
3853         * src/c++11/codecvt.cc: Define members of
3854         codecvt<char16_t, char8_t, mbstate_t>,
3855         codecvt<char32_t, char8_t, mbstate_t>,
3856         codecvt_byname<char16_t, char8_t, mbstate_t>, and
3857         codecvt_byname<char32_t, char8_t, mbstate_t>.
3858         * src/c++11/limits.cc: Define members of
3859         numeric_limits<char8_t>.
3860         * src/c++98/Makefile.am: Compile with -fchar8_t when compiling
3861         locale_init.cc and localename.cc.
3862         * src/c++98/Makefile.in: Likewise.
3863         * src/c++98/locale_init.cc: Add initialization for the
3864         codecvt<char16_t, char8_t, mbstate_t> and
3865         codecvt<char32_t, char8_t, mbstate_t> facets.
3866         * src/c++98/localename.cc: Likewise.
3867         * testsuite/util/testsuite_abi.cc: Validate ABI bump.
3868
3869 2019-02-18  Wilco Dijkstra  <wdijkstr@arm.com>
3870
3871         * 27_io/filesystem/operations/all.cc: Add dg-require-filesystem-ts.
3872         * 27_io/filesystem/operations/resize_file.cc: Likewise.
3873         * 27_io/filesystem/path/generation/normal2.cc: Likewise.
3874
3875 2019-02-14  Jonathan Wakely  <jwakely@redhat.com>
3876
3877         * doc/xml/manual/status_cxx2020.xml: Update P0887R1 status.
3878         * doc/html/*: Regenerate.
3879
3880         * doc/xml/manual/status_cxx2017.xml: Add P0063R3 to status table.
3881         * doc/html/*: Regenerate.
3882
3883         * doc/xml/manual/intro.xml: Document LWG 2586 status.
3884         * include/bits/uses_allocator.h (__uses_alloc): Use const lvalue
3885         allocator type in is_constructible checks.
3886         * testsuite/20_util/scoped_allocator/69293_neg.cc: Adjust dg-error.
3887         * testsuite/20_util/scoped_allocator/dr2586.cc: New test.
3888         * testsuite/20_util/tuple/cons/allocators.cc: Add test using
3889         problematic type from LWG 2586 discussion.
3890         * testsuite/20_util/uses_allocator/69293_neg.cc: Adjust dg-error.
3891         * testsuite/20_util/uses_allocator/cons_neg.cc: Likewise.
3892
3893         * configure.ac: Check for C11 timespec_get function.
3894         * crossconfig.m4 (freebsd, linux, gnu, cygwin, solaris, netbsd)
3895         (openbsd): Likewise
3896         * config.h.in: Regenerate.
3897         * configure: Regenerate.
3898         * include/c_global/ctime (timespec, timespec_get): Add to namespace
3899         std for C++17 and up.
3900
3901         * doc/xml/manual/intro.xml: Document LWG 2537 status.
3902         * include/bits/stl_queue.h
3903         (priority_queue(const Compare&, const Container&, const Alloc&))
3904         (priority_queue(const Compare&, Container&&, const Alloc&)): Call
3905         make_heap.
3906         * testsuite/23_containers/priority_queue/dr2537.cc: New test.
3907
3908         * doc/xml/manual/intro.xml: Document LWG 2566 status.
3909         * include/bits/stl_queue.h (queue, priority_queue): Add static
3910         assertions to enforce LWG 2566 requirement on value_type.
3911         * include/bits/stl_stack.h (stack): Likewise.
3912
3913         PR middle-end/89303
3914         * testsuite/20_util/enable_shared_from_this/89303.cc: New test.
3915
3916         * doc/xml/manual/intro.xml: Document LWG 2735 status.
3917         * include/bits/std_abs.h: Add comment about LWG 2735.
3918         * testsuite/26_numerics/headers/cstdlib/dr2735.cc: New test.
3919
3920 2019-02-13  Jonathan Wakely  <jwakely@redhat.com>
3921
3922         PR libstdc++/89345
3923         * include/std/version [__cpp_impl_destroying_delete]
3924         (__cpp_lib_destroying_delete): Only define for C++2a and later.
3925         * libsupc++/new [__cpp_impl_destroying_delete]
3926         (__cpp_lib_destroying_delete): Likewise.
3927         (destroying_delete_t, destroying_delete): Likewise, but define even
3928         when __cpp_impl_destroying_delete is not defined.
3929         * testsuite/18_support/destroying_delete.cc: New test.
3930
3931 2019-02-11  Jonathan Wakely  <jwakely@redhat.com>
3932
3933         PR libstdc++/89023
3934         * testsuite/17_intro/headers/c++2011/parallel_mode.cc: New test.
3935         * testsuite/17_intro/headers/c++2014/parallel_mode.cc: New test.
3936         * testsuite/17_intro/headers/c++2017/parallel_mode.cc: New test.
3937         * testsuite/28_regex/headers/regex/parallel_mode.cc: Remove.
3938
3939 2019-02-09  Jonathan Wakely  <jwakely@redhat.com>
3940
3941         PR libstdc++/71044
3942         * include/bits/fs_path.h (path::has_root_name)
3943         (path::has_root_directory, path::has_root_path)
3944         (path::has_relative_path, path::has_parent_path)
3945         (path::has_filename, path::has_stem, path::has_extension)
3946         (path::is_absolute, path::is_relative, path::_M_find_extension): Add
3947         noexcept.
3948         * src/c++17/fs_path.cc (path::has_root_name)
3949         (path::has_root_directory, path::has_root_path)
3950         (path::has_relative_path, path::has_parent_path)
3951         (path::has_filename, path::_M_find_extension): Add noexcept.
3952
3953 2019-02-06  Jonathan Wakely  <jwakely@redhat.com>
3954
3955         PR libstdc++/89102 (partial)
3956         * include/std/type_traits (common_type<>): Define.
3957         (common_type<T>): Derive from common_type<T, T>.
3958         * testsuite/20_util/common_type/requirements/explicit_instantiation.cc:
3959         Test zero-length template argument list.
3960         * testsuite/20_util/common_type/requirements/sfinae_friendly_1.cc:
3961         Test additional single argument cases.
3962         * testsuite/20_util/common_type/requirements/sfinae_friendly_2.cc:
3963         Adjust expected error.
3964
3965 2019-02-05  Jonathan Wakely  <jwakely@redhat.com>
3966
3967         PR libstdc++/89128
3968         * include/bits/stl_queue.h (queue, priority_queue): Add deduction
3969         guides.
3970         * include/bits/stl_stack.h (stack): Likewise.
3971         * testsuite/23_containers/priority_queue/deduction.cc: New test.
3972         * testsuite/23_containers/queue/deduction.cc: New test.
3973         * testsuite/23_containers/stack/deduction.cc: New test.
3974
3975         PR libstdc++/89194
3976         * include/std/type_traits (__is_convertible_helper)
3977         (__is_convertible_helper<_From, _To, false>): Revert changes to
3978         support is_nothrow_convertible.
3979         (__is_nt_convertible_helper): New helper.
3980         (is_nothrow_convertible): Use __is_nt_convertible_helper.
3981
3982         * testsuite/23_containers/vector/modifiers/push_back/49836.cc: Restore
3983         use of CopyConsOnlyType, but also test DelAnyAssign for completeness.
3984
3985         PR libstdc++/89130
3986         * include/bits/alloc_traits.h (__is_copy_insertable_impl): Rename to
3987         __is_alloc_insertable_impl. Replace single type member with two
3988         members, one for each of copy and move insertable.
3989         (__is_move_insertable): New trait for internal use.
3990         * include/bits/stl_vector.h (vector::_S_nothrow_relocate(true_type))
3991         (vector::_S_nothrow_relocate(true_type)): New functions to
3992         conditionally check if __relocate_a can throw.
3993         (vector::_S_use_relocate()): Dispatch to _S_nothrow_relocate based
3994         on __is_move_insertable.
3995         (vector::_S_do_relocate): New overloaded functions to conditionally
3996         call __relocate_a.
3997         (vector::_S_relocate): New function that dispatches to _S_do_relocate
3998         based on _S_use_relocate.
3999         * include/bits/vector.tcc (vector::reserve, vector::_M_realloc_insert)
4000         (vector::_M_default_append): Call _S_relocate instead of __relocate_a.
4001         * testsuite/23_containers/vector/modifiers/push_back/89130.cc: New.
4002
4003         PR libstdc++/89090
4004         * include/bits/stl_uninitialized.h (__relocate_a_1): Make unused
4005         parameter unnamed. Add message to static assertion.
4006         * include/bits/vector.tcc (vector::reserve, vector::_M_realloc_insert)
4007         (vector::_M_default_append): Use _GLIBCXX17_CONSTEXPR for if constexpr
4008         in C++11 code.
4009
4010 2019-02-05  Marc Glisse  <marc.glisse@inria.fr>
4011
4012         PR libstdc++/87106
4013         * include/bits/stl_uninitialized.h (__is_trivially_relocatable):
4014         Rename...
4015         (__is_bitwise_relocatable): ... to this.
4016         (__relocate_a_1): Adapt.
4017         * include/bits/stl_deque.h (__is_trivially_relocatable): Rename...
4018         (__is_bitwise_relocatable): ... to this.
4019
4020 2019-01-30  Jonathan Wakely  <jwakely@redhat.com>
4021
4022         PR libstdc++/89117
4023         * src/c++17/fs_path.cc (path::replace_extension): Erase extension from
4024         final component as well as from _M_pathname. Append the dot using
4025         operator+= instead of only to _M_pathname.
4026         (path::_M_find_extension): Reformat slightly.
4027         * testsuite/27_io/filesystem/path/modifiers/replace_extension.cc:
4028         Add more test cases.
4029
4030 2019-01-30  Ulrich Drepper  <drepper@redhat.com>
4031
4032         * doc/xml/manual/status_cxx2020.xml: Update P0600 entry.
4033
4034 2019-01-29  Jonathan Wakely  <jwakely@redhat.com>
4035
4036         * testsuite/26_numerics/headers/complex/synopsis.cc: Remove incorrect
4037         constexpr specifiers from arg and proj.
4038
4039         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Add missing exports for
4040         __shared_ptr instantiations used by gcc4-compatible ABI.
4041
4042         * include/experimental/forward_list (experimental::erase): Qualify
4043         call to erase_if.
4044         * include/experimental/list (experimental::erase): Likewise.
4045         * include/std/forward_list (std::erase): Likewise.
4046         * include/std/list (std::erase): Likewise.
4047
4048         * testsuite/20_util/reference_wrapper/result_type.cc: Disable for
4049         C++2a.
4050         * testsuite/20_util/reference_wrapper/typedefs-2.cc: Likewise.
4051         * testsuite/20_util/reference_wrapper/typedefs-3.cc: Likewise.
4052         * testsuite/20_util/reference_wrapper/typedefs.cc: Likewise.
4053         * testsuite/30_threads/async/54297.cc: Suppress nodiscard warning.
4054         * testsuite/ext/array_allocator/26875.cc: Likewise.
4055         * testsuite/ext/pool_allocator/allocate_chunk.cc: Likewise.
4056         * testsuite/util/replacement_memory_operators.h: Likewise.
4057         * testsuite/util/testsuite_allocator.h: Likewise.
4058
4059         * include/std/memory_resource (__pool_resource::_M_unpooled): Use
4060         normal mode vector, even for debug mode.
4061         * include/std/vector [_GLIBCXX_DEBUG] (_GLIBCXX_STD_C::pmr::vector):
4062         Define alias template for normal mode vector.
4063
4064 2019-01-28  Jonathan Wakely  <jwakely@redhat.com>
4065
4066         PR libstdc++/68737
4067         * config/locale/generic/c_locale.h (__convert_from_v)
4068         [_GLIBCXX_USE_C99_STDIO]: Also check _GLIBCXX_HAVE_BROKEN_VSNPRINTF.
4069         * config/os/hpux/os_defines.h: Define _GLIBCXX_HAVE_BROKEN_VSNPRINTF.
4070         * include/bits/locale_facets.tcc (num_put::_M_insert_float)
4071         [_GLIBCXX_USE_C99_STDIO]: Also check _GLIBCXX_HAVE_BROKEN_VSNPRINTF.
4072
4073 2019-01-24  Jonathan Wakely  <jwakely@redhat.com>
4074
4075         PR libstdc++/88840
4076         * include/bits/stl_vector.h (vector::__use_relocate): Replace static
4077         data member with static member function _S_use_relocate().
4078         * include/bits/vector.tcc (vector::reserve, vector::_M_realloc_insert)
4079         (vector::_M_default_append): Use _S_use_relocate() instead of
4080         __use_relocate.
4081
4082         * testsuite/27_io/filesystem/path/compare/strings.cc: Only compare
4083         sign of results.
4084
4085 2019-01-22  Jonathan Wakely  <jwakely@redhat.com>
4086
4087         PR libstdc++/88740
4088         * testsuite/util/testsuite_hooks.h [stderr] (VERIFY): Use fprintf to
4089         write to stderr instead of using printf.
4090
4091 2019-01-21  Jakub Jelinek  <jakub@redhat.com>
4092
4093         PR libstdc++/86590
4094         * include/bits/char_traits.h (__constant_string_p,
4095         __constant_char_array_p): Use __builtin_is_constant_evaluated if
4096         available.
4097
4098 2019-01-20  Ulrich Drepper  <drepper@redhat.com>
4099
4100         Implement C++20 P0600r1.
4101         * include/backward/hash_map: Add nodiscard attribute to empty.
4102         * include/backward/hash_set: Likewise.
4103         * backward/hashtable.h: Likewise.
4104         * include/bits/basic_string.h: Likewise.
4105         * include/bits/forward_list.h: Likewise.
4106         * include/bits/hashtable.h: Likewise.
4107         * include/bits/regex.h: Likewise.
4108         * include/bits/stl_deque.h: Likewise.
4109         * include/bits/stl_list.h: Likewise.
4110         * include/bits/stl_map.h: Likewise.
4111         * include/bits/stl_multimap.h: Likewise.
4112         * include/bits/stl_multiset.h: Likewise.
4113         * include/bits/stl_queue.h: Likewise.
4114         * include/bits/stl_set.h: Likewise.
4115         * include/bits/stl_stack.h: Likewise.
4116         * include/bits/stl_tree.h: Likewise.
4117         * include/bits/stl_vector.h: Likewise.
4118         * include/bits/unordered_map.h: Likewise.
4119         * include/bits/unordered_set.h: Likewise.
4120         * include/debug/array: Likewise.
4121         * include/experimental/any: Likewise.
4122         * include/experimental/bits/fs_path.h: Likewise.
4123         * include/experimental/internet: Likewise.
4124         * include/experimental/string_view: Likewise.
4125         * include/ext/pb_ds/detail/bin_search_tree_/info_fn_imps.hpp:
4126         Likewise.
4127         * include/ext/pb_ds/detail/binary_heap_/binary_heap_.hpp:
4128         Likewise.
4129         * include/ext/pb_ds/detail/binary_heap_/info_fn_imps.hpp:
4130         Likewise.
4131         * include/ext/pb_ds/detail/cc_hash_table_map_/cc_ht_map_.hpp:
4132         Likewise.
4133         * include/ext/pb_ds/detail/cc_hash_table_map_/info_fn_imps.hpp:
4134         Likewise.
4135         * include/ext/pb_ds/detail/cc_hash_table_map_/size_fn_imps.hpp:
4136         Likewise.
4137         * include/ext/pb_ds/detail/gp_hash_table_map_/gp_ht_map_.hpp:
4138         Likewise.
4139         * include/ext/pb_ds/detail/gp_hash_table_map_/info_fn_imps.hpp:
4140         Likewise.
4141         * include/ext/pb_ds/detail/left_child_next_sibling_heap_/
4142         info_fn_imps.hpp: Likewise.
4143         * include/ext/pb_ds/detail/left_child_next_sibling_heap_/
4144         left_child_next_sibling_heap_.hpp: Likewise.
4145         * include/ext/pb_ds/detail/list_update_map_/info_fn_imps.hpp:
4146         Likewise.
4147         * include/ext/pb_ds/detail/list_update_map_/lu_map_.hpp:
4148         Likewise.
4149         * include/ext/pb_ds/detail/ov_tree_map_/info_fn_imps.hpp:
4150         Likewise.
4151         * include/ext/pb_ds/detail/ov_tree_map_/ov_tree_map_.hp:
4152         Likewise.
4153         * include/ext/pb_ds/detail/pat_trie_/info_fn_imps.hpp:
4154         Likewise.
4155         * include/ext/pb_ds/detail/pat_trie_/pat_trie_.hpp:
4156         Likewise.
4157         * include/ext/pb_ds/detail/rc_binomial_heap_/rc.hpp:
4158         Likewise.
4159         * include/ext/pb_ds/detail/tree_trace_base.hpp: Likewise.
4160         * include/ext/pb_ds/trie_policy.hpp: Likewise.
4161         * include/ext/rope: Likewise.
4162         * include/ext/slist: Likewise.
4163         * include/ext/vstring.h: Likewise.
4164         * include/profile/array: Likewise.
4165         * include/std/array: Likewise.
4166         * include/tr1/array: Likewise.
4167         * include/tr1/hashtable.h: Likewise.
4168         * include/tr1/regex: Likewise.
4169         * include/tr2/dynamic_bitset: Likewise.
4170         * include/bits/alloc_traits.h: Add nodiscard attribute to
4171         allocate.
4172         * include/experimental/memory_resource: Likewise.
4173         * include/ext/alloc_traits.h: Likewise.
4174         * include/ext/array_allocator.h: Likewise.
4175         * include/ext/bitmap_allocator.h: Likewise.
4176         * include/ext/debug_allocator.h: Likewise.
4177         * include/ext/extptr_allocator.h: Likewise.
4178         * include/ext/mt_allocator.h: Likewise.
4179         * include/ext/new_allocator.h: Likewise.
4180         * include/ext/pool_allocator.h: Likewise.
4181         * include/ext/throw_allocator.h: Likewise.
4182         * include/std/scoped_allocator: Likewise.
4183         * libsupc++/eh_alloc.cc: Likewise.
4184         * include/std/future: Add nodiscard attribute to async.
4185         * libsupc++/new: Add nodiscard attribute to new.
4186
4187 2019-01-18  Jonathan Wakely  <jwakely@redhat.com>
4188
4189         PR libstdc++/87514
4190         PR libstdc++/87520
4191         PR libstdc++/88782
4192         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Export new symbol.
4193         * include/bits/shared_ptr.h
4194         (shared_ptr(_Sp_make_shared_tag, const Alloc&, Args&&...))
4195         (allocate_shared): Change to use new tag type.
4196         * include/bits/shared_ptr_base.h (_Sp_make_shared_tag::_S_eq):
4197         Declare new member function.
4198         (_Sp_alloc_shared_tag): Define new type.
4199         (_Sp_counted_ptr_inplace): Declare __shared_count<_Lp> as a friend.
4200         (_Sp_counted_ptr_inplace::_M_get_deleter) [!__cpp_rtti]: Use
4201         _Sp_make_shared_tag::_S_eq to check type_info.
4202         (__shared_count(Ptr, Deleter),__shared_count(Ptr, Deleter, Alloc)):
4203         Constrain to prevent being called with _Sp_alloc_shared_tag.
4204         (__shared_count(_Sp_make_shared_tag, const _Alloc&, Args&&...)):
4205         Replace constructor with ...
4206         (__shared_count(Tp*&, _Sp_alloc_shared_tag<_Alloc>, Args&&...)): Use
4207         reference parameter so address of the new object can be returned to
4208         the caller. Obtain the allocator from the tag type.
4209         (__shared_ptr(_Sp_make_shared_tag, const Alloc&, Args&&...)): Replace
4210         constructor with ...
4211         (__shared_ptr(_Sp_alloc_shared_tag<Alloc>, Args&&...)): Pass _M_ptr
4212         to the __shared_count constructor.
4213         (__allocate_shared): Change to use new tag type.
4214         * src/c++11/shared_ptr.cc (_Sp_make_shared_tag::_S_eq): Define.
4215
4216 2019-01-17  Jonathan Wakely  <jwakely@redhat.com>
4217
4218         * src/c++17/fs_ops.cc
4219         (equivalent(const path&, const path&, error_code&))
4220         [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Use GetFileInformationByHandle to
4221         compare files instead of relying on incomplete info returned by stat.
4222
4223         PR libstdc++/88884
4224         * src/c++17/fs_ops.cc (absolute(const path&, error_code&)): Do nothing
4225         if the path is already absolute.
4226         [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Normalize root-directory.
4227         [!_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Pass error_code to current_path.
4228
4229         PR libstdc++/88881
4230         * src/c++17/fs_ops.cc (canonical(const path&, error_code&))
4231         [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Normalize path, to match behaviour
4232         of filesystem::exists.
4233         (create_directories(const path&, error_code&)): Add assertions.
4234         (status(const path&, error_code&)) [_GLIBCXX_FILESYSTEM_IS_WINDOWS]:
4235         Add workaround for bug in _wstat for paths with trailing slash.
4236         * testsuite/27_io/filesystem/operations/create_directories.cc: Adjust
4237         for expected behaviour on mingw.
4238         * testsuite/experimental/filesystem/operations/create_directories.cc:
4239         Likewise.
4240         * testsuite/27_io/filesystem/operations/temp_directory_path.cc: Use
4241         "TMP" instead of "TMPDIR" and clean environment before each test. Do
4242         not test permissions on mingw targets.
4243
4244 2019-01-16  Jonathan Wakely  <jwakely@redhat.com>
4245
4246         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Add exports for fstream
4247         constructors and open members taking wide strings. Fix patterns for
4248         filesystem::path members to match wstring_view parameters. Add
4249         exports for shared_ptr members used by directory iterators.
4250         * src/c++17/fs_ops.cc (remove(const path&, error_code&)): Clear the
4251         error code parameter if the file doesn't exist.
4252         * src/filesystem/ops.cc (remove(const path&, error_code&)):
4253         Likewise.
4254         * testsuite/27_io/filesystem/operations/canonical.cc: Fix expected
4255         values for mingw targets, where "/" is not an absolute path. Do not
4256         test symlinks on mingw targets.
4257         * testsuite/experimental/filesystem/operations/canonical.cc: Likewise.
4258         * testsuite/27_io/filesystem/operations/copy.cc: Do not test symlinks
4259         on mingw targets.
4260         * testsuite/experimental/filesystem/operations/copy.cc: Likewise.
4261         * testsuite/27_io/filesystem/operations/create_directories.cc: Check
4262         that each component of the path is created.
4263         * testsuite/experimental/filesystem/operations/create_directories.cc:
4264         Likewise.
4265         * testsuite/27_io/filesystem/operations/exists.cc: Do not test
4266         permissions on mingw targets.
4267         * testsuite/experimental/filesystem/operations/exists.cc: Likewise.
4268         * testsuite/27_io/filesystem/operations/is_empty.cc: Likewise.
4269         * testsuite/experimental/filesystem/operations/is_empty.cc: Likewise.
4270         * testsuite/27_io/filesystem/operations/permissions.cc: XFAIL for
4271         mingw targets.
4272         * testsuite/experimental/filesystem/operations/permissions.cc:
4273         Likewise.
4274         * testsuite/27_io/filesystem/operations/remove.cc: Do not test
4275         symlinks or permissions on mingw targets.
4276         * testsuite/experimental/filesystem/operations/remove.cc: Likewise.
4277         * testsuite/27_io/filesystem/operations/remove_all.cc: Do not test
4278         symlinks on mingw targets.
4279         * testsuite/experimental/filesystem/operations/remove_all.cc:
4280         Likewise.
4281         * testsuite/27_io/filesystem/operations/status.cc: Do not test
4282         permissions on mingw targets.
4283         * testsuite/27_io/filesystem/operations/weakly_canonical.cc: Do not
4284         test symlinks on mingw targets.
4285         * testsuite/experimental/filesystem/operations/space.cc: Fix test
4286         for mingw targets.
4287
4288 2019-02-14  Ulrich Drepper  <drepper@redhat.com>
4289
4290         PR libstdc++/88738
4291         Warn about unused comparisons of shared_ptr/unique_ptr
4292         * include/bits/c++config [_GLIBCXX_NODISCARD]: Define.
4293         * include/bits/shared_ptr.h: Use it for operator ==, !=,
4294         <, <=, >, >= for shared_ptr.
4295         * include/bits/unique_ptr.h: Likewise for unique_ptr.
4296
4297 2019-01-15  Jonathan Wakely  <jwakely@redhat.com>
4298
4299         * include/bits/shared_ptr_base.h (__cpp_lib_shared_ptr_arrays): Define
4300         as 201611L, because P0497R0 changes are supported.
4301         * include/std/version (__cpp_lib_shared_ptr_arrays): Likewise.
4302
4303         * include/bits/erase_if.h [__cplusplus > 201703L]
4304         (__cpp_lib_erase_if): Only define for C++2a.
4305         * include/std/iterator [__cplusplus >= 201402L && !_GLIBCXX_DEBUG]
4306         (__cpp_lib_null_iterators): Define.
4307         * include/std/version [__cplusplus >= 201402L && !_GLIBCXX_DEBUG]
4308         (__cpp_lib_null_iterators): Define.
4309         [__cpp_impl_destroying_delete] (__cpp_lib_destroying_delete): Define.
4310
4311         * doc/xml/manual/status_cxx2017.xml: Document P0032R3 and P0307R2
4312         status.
4313         * include/bits/stl_uninitialized.h (__cpp_lib_raw_memory_algorithms):
4314         Define.
4315         * include/std/any (__cpp_lib_any): Define as 201606L, because P0032R3
4316         changes are supported.
4317         * include/std/optional (__cpp_lib_optional): Likewise.
4318         * include/std/variant (__cpp_lib_variant): Likewise.
4319         * include/std/version [!__STRICT_ANSI__]
4320         (__cpp_lib_uncaught_exceptions): Define as long integer.
4321         [__cplusplus >= 201703L] (__cpp_lib_any)
4322         (__cpp_lib_raw_memory_algorithms, __cpp_lib_uncaught_exceptions)
4323         (__cpp_lib_variant): Define for C++17.
4324         [__cplusplus >= 201703L] (__cpp_lib_optional): Update value and define
4325         as long integer.
4326         * libsupc++/exception (__cpp_lib_uncaught_exceptions): Define as long
4327         integer.
4328
4329         * doc/xml/manual/status_cxx2020.xml: Update P1123R0 status.
4330
4331 2019-01-12  Jonathan Wakely  <jwakely@redhat.com>
4332
4333         PR libstdc++/88811
4334         PR libstdc++/83306
4335         * src/filesystem/path.cc: Fix typo. If first path is empty, show []
4336         before second path.
4337         * testsuite/experimental/filesystem/filesystem_error/cons.cc: New
4338         test.
4339
4340 2019-01-11  Jonathan Wakely  <jwakely@redhat.com>
4341
4342         * doc/xml/manual/intro.xml: Include new section.
4343         * doc/xml/manual/status_cxx2017.xml: Document more
4344         implementation-defined properties of the library.
4345         * doc/xml/manual/status_cxx2020.xml: Document C++2a status.
4346         * doc/html/*: Regenerate.
4347
4348         * include/bits/refwrap.h [__cplusplus > 201703L]
4349         (_Refwrap_base_arg1, _Refwrap_base_arg2, _Reference_wrapper_base)
4350         (_Reference_wrapper_base_memfun): Do not define for C++2a.
4351         (reference_wrapper): Do not derive from _Reference_wrapper_base_memfun
4352         for C++2a.
4353         (reference_wrapper::operator()): Add static assertion.
4354         * testsuite/20_util/reference_wrapper/incomplete.cc: New test.
4355
4356         * include/std/chrono (duration_values::zero(), duration_values::min())
4357         (duration_values::max()): Add noexcept.
4358         (duration::zero(), duration::min(), duration::max()): Likewise.
4359         (time_point::zero(), time_point::min(), time_point::max()): Likewise.
4360         * testsuite/20_util/duration/requirements/noexcept.cc: New test.
4361         * testsuite/20_util/time_point/requirements/noexcept.cc: New test.
4362
4363         * include/std/version (__cpp_lib_erase_if): Move to C++20 group.
4364
4365 2019-01-11  Jakub Jelinek  <jakub@redhat.com>
4366
4367         * include/std/type_traits (__cpp_lib_is_constant_evaluated): Define.
4368         * include/std/version (__cpp_lib_is_constant_evaluated): Define.
4369
4370 2019-01-11  Jonathan Wakely  <jwakely@redhat.com>
4371
4372         PR libstdc++/88802
4373         * include/bits/functional_hash.h (hash<nullptr_t>): Define
4374         specialization for C++17 (P0513R0, LWG 2817).
4375         * testsuite/20_util/hash/nullptr.cc: New test.
4376
4377         PR libstdc++/88125
4378         * config/abi/pre/gnu.ver (GLIBCXX_3.4.6): Remove unused duplicate
4379         pattern for std::basic_stringbuf::str().
4380
4381         * config/abi/pre/gnu.ver (GLIBCXX_3.4): Correct recent changes to
4382         basic_ostream::operator<< patterns.
4383
4384 2019-01-10  Jonathan Wakely  <jwakely@redhat.com>
4385
4386         * testsuite/27_io/filesystem/operations/last_write_time.cc: Fix
4387         test failures on targets with 32-bit time_t.
4388
4389         * include/bits/erase_if.h: Define __cpp_lib_erase_if.
4390         * include/std/deque: Likewise.
4391         * include/std/forward_list: Likewise.
4392         * include/std/list: Likewise.
4393         * include/std/string: Likewise.
4394         * include/std/vector: Likewise.
4395         * include/std/version: Likewise.
4396         * testsuite/21_strings/basic_string/erasure.cc: Test macro.
4397         * testsuite/23_containers/deque/erasure.cc: Likewise.
4398         * testsuite/23_containers/forward_list/erasure.cc: Likewise.
4399         * testsuite/23_containers/list/erasure.cc: Likewise.
4400         * testsuite/23_containers/map/erasure.cc: Likewise.
4401         * testsuite/23_containers/set/erasure.cc: Likewise.
4402         * testsuite/23_containers/unordered_map/erasure.cc: Likewise.
4403         * testsuite/23_containers/unordered_set/erasure.cc: Likewise.
4404         * testsuite/23_containers/vector/erasure.cc: Likewise.
4405
4406         * include/experimental/internet [AI_NUMERICSERV]
4407         (resolver_base::numeric_service): Define conditionally.
4408         * testsuite/experimental/net/internet/resolver/base.cc: Test it
4409         conditionally.
4410         * testsuite/experimental/net/internet/resolver/ops/lookup.cc:
4411         Likewise.
4412
4413 2019-01-10  Ville Voutilainen  <ville.voutilainen@gmail.com>
4414             Jonathan Wakely  <jwakely@redhat.com>
4415
4416         Implement LWG 2221
4417         * config/abi/pre/gnu.ver (GLIBCXX_3.4): Tighten patterns.
4418         (GLIBCXX_3.4.26): Add new exports.
4419         * include/Makefile.am: Add ostream-inst.cc. Move string-inst.cc to
4420         correct list of sources.
4421         * include/Makefile.in: Regenerate.
4422         * include/std/ostream (operator<<(nullptr_t)): New member function.
4423         * src/c++17/ostream-inst.cc: New file.
4424         * testsuite/27_io/basic_ostream/inserters_other/char/lwg2221.cc: New
4425         test.
4426
4427 2019-01-10  Jonathan Wakely  <jwakely@redhat.com>
4428
4429         * testsuite/util/testsuite_fs.h (nonexistent_path): Include name
4430         of the source file containing the caller.
4431         * testsuite/27_io/filesystem/iterators/directory_iterator.cc: Remove
4432         directories created by test.
4433         * testsuite/27_io/filesystem/iterators/recursive_directory_iterator.cc:
4434         Likewise.
4435         * testsuite/experimental/filesystem/iterators/directory_iterator.cc:
4436         Likewise.
4437         * testsuite/experimental/filesystem/iterators/
4438         recursive_directory_iterator.cc: Likewise.
4439
4440 2019-01-10  Jakub Jelinek  <jakub@redhat.com>
4441
4442         PR tree-optimization/88775
4443         * include/bits/stl_function.h (greater<_Tp*>::operator(),
4444         less<_Tp*>::operator(), greater_equal<_Tp*>::operator(),
4445         less_equal<_Tp*>::operator()): Use __builtin_is_constant_evaluated
4446         instead of __builtin_constant_p if available.  Don't bother with
4447         the pointer comparison in C++11 and earlier.
4448
4449 2019-01-09  Sandra Loosemore  <sandra@codesourcery.com>
4450
4451         PR other/16615
4452
4453         * include/ext/bitmap_allocator.h: Mechanically replace "can not"
4454         with "cannot".
4455
4456 2019-01-09  Jonathan Wakely  <jwakely@redhat.com>
4457
4458         * testsuite/libstdc++-prettyprinters/cxx17.cc: Fix expected output
4459         for filesystem::path. Give variables more distinctive names.
4460
4461         * include/std/optional (_Optional_payload_base::_M_copy_assign): New
4462         member function to perform non-trivial assignment.
4463         (_Optional_payload_base::_M_move_assign): Likewise.
4464         (_Optional_payload<T, true, false, true>::operator=)
4465         (_Optional_payload<T, true, true, false>::operator=)
4466         (_Optional_payload<T, true, false, false>::operator=): Call
4467         _M_copy_assign and/or _M_move_assign to do non-trivial assignments.
4468
4469         PR libstdc++/88204
4470         * testsuite/26_numerics/complex/operators/more_constexpr.cc: Do not
4471         test std::complex<long double> if long double format is IBM128.
4472         * testsuite/26_numerics/complex/requirements/more_constexpr.cc:
4473         Likewise.
4474
4475 2019-01-08  Jonathan Wakely  <jwakely@redhat.com>
4476
4477         * testsuite/libstdc++-prettyprinters/compat.cc: Test printer support
4478         for old std::unique_ptr layout.
4479         * testsuite/libstdc++-prettyprinters/cxx17.cc: Fix std::variant test
4480         to become valueless. Add filesystem::path tests.
4481
4482         PR libstdc++/87855
4483         * include/std/optional (_Optional_payload_base): New class template
4484         for common code hoisted from _Optional_payload specializations. Use
4485         a template for the union, to allow a partial specialization for
4486         types with non-trivial destructors. Add constructors for in-place
4487         initialization to the union.
4488         (_Optional_payload(bool, const _Optional_payload&)): Use _M_construct
4489         to perform non-trivial copy construction, instead of relying on
4490         non-standard copy elision in a delegating constructor.
4491         (_Optional_payload(bool, _Optional_payload&&)): Likewise for
4492         non-trivial move construction.
4493         (_Optional_payload): Derive from _Optional_payload_base and use it
4494         for everything except the non-trivial assignment operators, which are
4495         defined as needed.
4496         (_Optional_payload<false, C, M>): Derive from the specialization
4497         _Optional_payload<true, false, false> and add a destructor.
4498         (_Optional_base_impl::_M_destruct, _Optional_base_impl::_M_reset):
4499         Forward to corresponding members of _Optional_payload.
4500         (_Optional_base_impl::_M_is_engaged, _Optional_base_impl::_M_get):
4501         Hoist common members from _Optional_base.
4502         (_Optional_base): Make all members and base class public.
4503         (_Optional_base::_M_get, _Optional_base::_M_is_engaged): Move to
4504         _Optional_base_impl.
4505         * python/libstdcxx/v6/printers.py (StdExpOptionalPrinter): Add
4506         support for new std::optional layout.
4507         * testsuite/libstdc++-prettyprinters/compat.cc: New test.
4508
4509         PR libstdc++/88066
4510         * include/bits/locale_conv.h: Use <> for includes not "".
4511         * include/ext/random: Likewise.
4512         * include/ext/vstring.h: Likewise.
4513
4514 2019-01-08  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
4515
4516         * config/abi/pre/gnu.ver (GLIBCXX_3.4): Tighten existing patterns.
4517         (GLIBCXX_3.4.21): Likewise.
4518
4519 2019-01-08  Jonathan Wakely  <jwakely@redhat.com>
4520
4521         PR libstdc++/88749
4522         * src/filesystem/ops.cc (last_write_time): Fix preprocessor condition
4523         to match the one that controls whether utimbuf and utime are declared.
4524
4525 2019-01-07  Jonathan Wakely  <jwakely@redhat.com>
4526
4527         PR libstdc++/87787
4528         * include/bits/char_traits.h (char_traits::move): Do not pass null
4529         pointers to memmove.
4530         * include/bits/locale_facets.h
4531         (ctype<char>::widen(const char*, const char*, char*)): Do not
4532         pass null pointers to memcpy.
4533         (ctype<char>::narrow(const char*, const char*, char, char*)):
4534         Likewise.
4535         (ctype<char>::do_widen(const char*, const char*, char*)):
4536         Likewise.
4537         (ctype<char>::do_narrow(const char*, const char*, char, char*)):
4538         Likewise.
4539
4540         * doc/xml/manual/spine.xml: Update copyright years.
4541         * doc/xml/manual/status_cxx2017.xml: Adjust note about -lstdc++fs.
4542         * doc/xml/manual/using.xml: Remove requirement to link with -lstdc++fs
4543         for C++17 filesystem library.
4544         * doc/html/*: Regenerate.
4545
4546         * acinclude.m4 (GLIBCXX_CHECK_FILESYSTEM_DEPS): Check for truncate.
4547         * config.h.in: Regenerate.
4548         * config/abi/pre/gnu.ver: Order patterns for filesystem operations
4549         alphabetically and add missing entries for copy_symlink,
4550         hard_link_count, rename, and resize_file.
4551         * configure: Regenerate.
4552         * src/c++17/fs_ops.cc (resize_file): Remove #if so posix::truncate is
4553         used unconditionally.
4554         * src/filesystem/ops-common.h (__gnu_posix::truncate)
4555         [!_GLIBCXX_HAVE_TRUNCATE]: Provide fallback definition that only
4556         supports truncating to zero length.
4557         * testsuite/27_io/filesystem/operations/all.cc: New test.
4558         * testsuite/27_io/filesystem/operations/resize_file.cc: New test.
4559
4560 2019-01-06  Jonathan Wakely  <jwakely@redhat.com>
4561
4562         PR libstdc++/86756
4563         * acinclude.m4 (GLIBCXX_CHECK_FILESYSTEM_DEPS): Check for utime and
4564         lstat and define _GLIBCXX_USE_UTIME and _GLIBCXX_USE_LSTAT.
4565         * config.h.in: Regenerate.
4566         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Export symbols for
4567         remaining std::filesystem types and functions.
4568         * configure: Regenerate.
4569         * src/c++17/Makefile.am: Add C++17 filesystem sources.
4570         * src/c++17/Makefile.in: Regenerate.
4571         * src/c++17/cow-fs_dir.cc: Move src/filesystem/cow-std-dir.cc to
4572         here, and change name of included file.
4573         * src/c++17/cow-fs_ops.cc: Move src/filesystem/cow-std-ops.cc to
4574         here, and change name of included file.
4575         * src/c++17/fs_dir.cc: Move src/filesystem/std-dir.cc to here. Change
4576         path to dir-common.h.
4577         * src/c++17/fs_ops.cc: Move src/filesystem/std-ops.cc to here. Change
4578         path to ops-common.h. Disable -Wunused-parameter warnings.
4579         (internal_file_clock): Define unconditionally.
4580         [!_GLIBCXX_HAVE_SYS_STAT_H] (internal_file_clock::from_stat): Do not
4581         define.
4582         (do_copy_file, do_space): Move definitions to ops.common.h.
4583         (copy, file_size, hard_link_count, last_write_time, space): Only
4584         perform operation when _GLIBCXX_HAVE_SYS_STAT_H is defined, otherwise
4585         report an error.
4586         (last_write_time, read_symlink): Remove unused attributes from
4587         parameters.
4588         * src/filesystem/Makefile.am: Remove C++17 filesystem sources.
4589         * src/filesystem/Makefile.in: Regenerate.
4590         * src/filesystem/cow-std-dir.cc: Move to src/c++17/cow-fs_dir.cc.
4591         * src/filesystem/cow-std-ops.cc: Move to src/c++17/cow-fs_ops.cc.
4592         * src/filesystem/std-dir.cc: Move to src/c++17/fs_dir.cc.
4593         * src/filesystem/std-ops.cc: Move to src/c++17/fs_ops.cc.
4594         * src/filesystem/dir-common.h [!_GLIBCXX_HAVE_DIRENT_H]: Define
4595         dummy types and functions instead of using #error.
4596         * src/filesystem/dir.cc [!_GLIBCXX_HAVE_DIRENT_H]: Use #error.
4597         * src/filesystem/ops-common.h [!_GLIBCXX_USE_LSTAT] (lstat): Define
4598         in terms of stat.
4599         [!_GLIBCXX_HAVE_UNISTD_H]: Define dummy types and functions.
4600         (do_copy_file, do_space): Move definitions here from std-ops.cc.
4601         * src/filesystem/ops.cc: Adjust calls to do_copy_file and do_space
4602         to account for new namespace.
4603         * testsuite/27_io/filesystem/directory_entry/86597.cc: Remove
4604         -lstdc++fs from dg-options.
4605         * testsuite/27_io/filesystem/directory_entry/lwg3171.cc: Likewise.
4606         * testsuite/27_io/filesystem/file_status/1.cc: Likewise.
4607         * testsuite/27_io/filesystem/filesystem_error/cons.cc: Likewise.
4608         * testsuite/27_io/filesystem/filesystem_error/copy.cc: Likewise.
4609         * testsuite/27_io/filesystem/iterators/directory_iterator.cc:
4610         Likewise.
4611         * testsuite/27_io/filesystem/iterators/pop.cc: Likewise.
4612         * testsuite/27_io/filesystem/iterators/recursive_directory_iterator.cc:
4613         Likewise.
4614         * testsuite/27_io/filesystem/operations/absolute.cc: Likewise.
4615         * testsuite/27_io/filesystem/operations/canonical.cc: Likewise.
4616         * testsuite/27_io/filesystem/operations/copy.cc: Likewise.
4617         * testsuite/27_io/filesystem/operations/copy_file.cc: Likewise.
4618         * testsuite/27_io/filesystem/operations/create_directories.cc:
4619         Likewise.
4620         * testsuite/27_io/filesystem/operations/create_directory.cc: Likewise.
4621         * testsuite/27_io/filesystem/operations/create_symlink.cc: Likewise.
4622         * testsuite/27_io/filesystem/operations/current_path.cc: Likewise.
4623         * testsuite/27_io/filesystem/operations/equivalent.cc: Likewise.
4624         * testsuite/27_io/filesystem/operations/exists.cc: Likewise.
4625         * testsuite/27_io/filesystem/operations/file_size.cc: Likewise.
4626         * testsuite/27_io/filesystem/operations/is_empty.cc: Likewise.
4627         * testsuite/27_io/filesystem/operations/last_write_time.cc: Likewise.
4628         * testsuite/27_io/filesystem/operations/permissions.cc: Likewise.
4629         * testsuite/27_io/filesystem/operations/proximate.cc: Likewise.
4630         * testsuite/27_io/filesystem/operations/read_symlink.cc: Likewise.
4631         * testsuite/27_io/filesystem/operations/relative.cc: Likewise.
4632         * testsuite/27_io/filesystem/operations/remove.cc: Likewise.
4633         * testsuite/27_io/filesystem/operations/remove_all.cc: Likewise.
4634         * testsuite/27_io/filesystem/operations/space.cc: Likewise.
4635         * testsuite/27_io/filesystem/operations/status.cc: Likewise.
4636         * testsuite/27_io/filesystem/operations/symlink_status.cc: Likewise.
4637         * testsuite/27_io/filesystem/operations/temp_directory_path.cc:
4638         Likewise.
4639         * testsuite/27_io/filesystem/operations/weakly_canonical.cc: Likewise.
4640
4641
4642         PR libstdc++/86756
4643         * config/abi/pre/gnu.ver (GLIBCXX_3.4): Make various patterns for
4644         typeinfo and vtables less greedy.
4645         (GLIBCXX_3.4.26): Export symbols for std::filesystem::path.
4646         * src/c++17/Makefile.am: Add fs_path.cc and cow-fs_path.cc.
4647         * src/c++17/Makefile.in: Regenerate.
4648         * src/c++17/cow-fs_path.cc: Move src/filesystem/cow-std-path.cc to
4649         here, and change name of included file.
4650         * src/c++17/fs_path.cc: Move src/filesystem/std-path.cc to here.
4651         * src/filesystem/Makefile.am: Remove std-path.cc and cow-std-path.cc
4652         from sources.
4653         * src/filesystem/Makefile.in: Regenerate.
4654         * src/filesystem/cow-std-path.cc: Move to src/c++17/cow-fs_path.cc.
4655         * src/filesystem/std-path.cc: Move to src/c++17/fs_path.cc.
4656         * testsuite/27_io/filesystem/path/append/path.cc: Remove -lstdc++fs
4657         from dg-options and remove dg-require-filesystem-ts.
4658         * testsuite/27_io/filesystem/path/append/source.cc: Likewise.
4659         * testsuite/27_io/filesystem/path/assign/assign.cc: Likewise.
4660         * testsuite/27_io/filesystem/path/assign/copy.cc: Likewise.
4661         * testsuite/27_io/filesystem/path/compare/compare.cc: Likewise.
4662         * testsuite/27_io/filesystem/path/compare/lwg2936.cc: Likewise.
4663         * testsuite/27_io/filesystem/path/compare/path.cc: Likewise.
4664         * testsuite/27_io/filesystem/path/compare/strings.cc: Likewise.
4665         * testsuite/27_io/filesystem/path/concat/path.cc: Likewise.
4666         * testsuite/27_io/filesystem/path/concat/strings.cc: Likewise.
4667         * testsuite/27_io/filesystem/path/construct/80762.cc: Likewise.
4668         * testsuite/27_io/filesystem/path/construct/copy.cc: Likewise.
4669         * testsuite/27_io/filesystem/path/construct/default.cc: Likewise.
4670         * testsuite/27_io/filesystem/path/construct/format.cc: Likewise.
4671         * testsuite/27_io/filesystem/path/construct/locale.cc: Likewise.
4672         * testsuite/27_io/filesystem/path/construct/range.cc: Likewise.
4673         * testsuite/27_io/filesystem/path/construct/string_view.cc: Likewise.
4674         * testsuite/27_io/filesystem/path/decompose/extension.cc: Likewise.
4675         * testsuite/27_io/filesystem/path/decompose/filename.cc: Likewise.
4676         * testsuite/27_io/filesystem/path/decompose/parent_path.cc: Likewise.
4677         * testsuite/27_io/filesystem/path/decompose/relative_path.cc: Likewise.
4678         * testsuite/27_io/filesystem/path/decompose/root_directory.cc:
4679         Likewise.
4680         * testsuite/27_io/filesystem/path/decompose/root_name.cc: Likewise.
4681         * testsuite/27_io/filesystem/path/decompose/root_path.cc: Likewise.
4682         * testsuite/27_io/filesystem/path/decompose/stem.cc: Likewise.
4683         * testsuite/27_io/filesystem/path/generation/normal.cc: Likewise.
4684         * testsuite/27_io/filesystem/path/generation/normal2.cc: Likewise.
4685         * testsuite/27_io/filesystem/path/generation/proximate.cc: Likewise.
4686         * testsuite/27_io/filesystem/path/generation/relative.cc: Likewise.
4687         * testsuite/27_io/filesystem/path/generic/generic_string.cc: Likewise.
4688         * testsuite/27_io/filesystem/path/itr/components.cc: Likewise.
4689         * testsuite/27_io/filesystem/path/itr/traversal.cc: Likewise.
4690         * testsuite/27_io/filesystem/path/modifiers/clear.cc: Likewise.
4691         * testsuite/27_io/filesystem/path/modifiers/make_preferred.cc:
4692         Likewise.
4693         * testsuite/27_io/filesystem/path/modifiers/remove_filename.cc:
4694         Likewise.
4695         * testsuite/27_io/filesystem/path/modifiers/replace_extension.cc:
4696         Likewise.
4697         * testsuite/27_io/filesystem/path/modifiers/replace_filename.cc:
4698         Likewise.
4699         * testsuite/27_io/filesystem/path/modifiers/swap.cc: Likewise.
4700         * testsuite/27_io/filesystem/path/native/string.cc: Likewise.
4701         * testsuite/27_io/filesystem/path/nonmember/append.cc: Likewise.
4702         * testsuite/27_io/filesystem/path/nonmember/hash_value.cc: Likewise.
4703         * testsuite/27_io/filesystem/path/query/empty.cc: Likewise.
4704         * testsuite/27_io/filesystem/path/query/has_extension.cc: Likewise.
4705         * testsuite/27_io/filesystem/path/query/has_filename.cc: Likewise.
4706         * testsuite/27_io/filesystem/path/query/has_parent_path.cc: Likewise.
4707         * testsuite/27_io/filesystem/path/query/has_relative_path.cc: Likewise.
4708         * testsuite/27_io/filesystem/path/query/has_root_directory.cc:
4709         Likewise.
4710         * testsuite/27_io/filesystem/path/query/has_root_name.cc: Likewise.
4711         * testsuite/27_io/filesystem/path/query/has_root_path.cc: Likewise.
4712         * testsuite/27_io/filesystem/path/query/has_stem.cc: Likewise.
4713         * testsuite/27_io/filesystem/path/query/is_absolute.cc: Likewise.
4714         * testsuite/27_io/filesystem/path/query/is_relative.cc: Likewise.
4715
4716         PR libstdc++/87431
4717         * include/std/variant (_Variant_storage<true, _Types...>::_M_valid):
4718         Check is_trivially_copyable instead of is_scalar.
4719         (variant::emplace<N, Args>(Args&&...)): If construction of the new
4720         contained value can throw and its type is trivially copyable then
4721         construct into a temporary variant and move from it, to provide the
4722         strong exception safety guarantee.
4723         (variant::emplace<N, U, Args>(initializer_list<U>, Args&&...)):
4724         Likewise.
4725         * testsuite/20_util/variant/87431.cc: New test.
4726         * testsuite/20_util/variant/run.cc: Adjust test so that throwing
4727         conversion causes valueless state.
4728
4729         PR libstdc++/88607
4730         * testsuite/17_intro/headers/c++1998/charset.cc: New test.
4731         * testsuite/17_intro/headers/c++2011/charset.cc: New test.
4732         * testsuite/17_intro/headers/c++2014/charset.cc: New test.
4733         * testsuite/17_intro/headers/c++2017/charset.cc: New test.
4734         * testsuite/17_intro/headers/c++2020/charset.cc: New test.
4735
4736 2019-01-05  Jonathan Wakely  <jwakely@redhat.com>
4737
4738         * include/bits/fs_fwd.h (__file_clock): Define new clock.
4739         (file_time_type): Redefine in terms of __file_clock.
4740         * src/filesystem/ops-common.h (file_time): Add FIXME comment about
4741         overflow.
4742         * src/filesystem/std-ops.cc (is_set(perm_options, perm_options)): Give
4743         internal linkage.
4744         (internal_file_lock): New helper type for accessing __file_clock.
4745         (do_copy_file): Use internal_file_lock to convert system time to
4746         file_time_type.
4747         (last_write_time(const path&, error_code&)): Likewise.
4748         (last_write_time(const path&, file_time_type, error_code&)): Likewise.
4749
4750 2019-01-04  Jonathan Wakely  <jwakely@redhat.com>
4751
4752         * config/abi/pre/gnu.ver (GLIBCXX_3.4.21): Make patterns less greedy
4753         for const member functions of std::basic_string.
4754         (GLIBCXX_3.4.26): Export member functions of std::basic_string added
4755         in C++17.
4756         * include/bits/basic_string.h (basic_string(__sv_wrapper, const A&)):
4757         Make non-standard constructor private.
4758         [!_GLIBCXX_USE_CXX11_ABI] (basic_string(__sv_wrapper, const A&)):
4759         Likewise.
4760         * include/bits/basic_string.tcc (std::string, std::wstring): Declare
4761         explicit instantiations for C++17 as well as earlier dialects.
4762         * src/c++17/Makefile.am: Add new source files.
4763         * src/c++17/Makefile.in: Regenerate.
4764         * src/c++17/cow-string-inst.cc: New file defining explicit
4765         instantiations for basic_string member functions added in C++17.
4766         * src/c++17/string-inst.cc: Likewise.
4767
4768         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Export allocator-extended
4769         copy/move constructors for old std::basic_string.
4770         * include/bits/basic_string.h [!_GLIBCXX_USE_CXX11_ABI]
4771         (basic_string::reference, basic_string::const_reference): Define
4772         as plain references for C++11 and later.
4773         (basic_string::basic_string()): Put constructor body outside
4774         preprocessor conditional groups.
4775         (basic_string::basic_string(basic_string&&)): Move _Alloc_hider
4776         instead of copying it.
4777         (basic_string::basic_string(const basic_string&, const _Alloc&)):
4778         Define.
4779         (basic_string::basic_string(basic_string&&, const _Alloc&)):
4780         Define.
4781         * include/bits/fs_path.h [!_GLIBCXX_USE_CXX11_ABI]: Remove special
4782         cases for old basic_string.
4783         * testsuite/21_strings/basic_string/cons/char/8.cc: Test
4784         allocator-extended constructors unconditionally. Add extra members to
4785         allocator type when using old string ABI.
4786         * testsuite/21_strings/basic_string/allocator/71964.cc: Enable test
4787         for old string ABI.
4788         * testsuite/21_strings/basic_string/cons/wchar_t/8.cc: Likewise.
4789
4790         * testsuite/23_containers/list/61347.cc: Avoid spurious failure when
4791         -fno-inline added to test flags.
4792
4793         * testsuite/21_strings/basic_string/requirements/
4794         explicit_instantiation/debug.cc: Remove XFAIL for old ABI.
4795
4796         * testsuite/27_io/filesystem/filesystem_error/copy.cc: Fix static
4797         assertion failures with old std::string ABI.
4798
4799         * include/bits/fs_path.h (path::_List::erase): Replace both overloads
4800         with ...
4801         (path::pop_back(), path::_M_erase_from(const_iterator)): New member
4802         functions that will only erase elements at the end.
4803         * src/filesystem/std-path.cc (path::_List::_Impl::pop_back()): Define.
4804         (path::_List::_Impl::_M_erase_from(const_iterator)): Define.
4805         (path::_List::operator=(const _List&)): Use _M_erase_from(p) instead
4806         of erase(p, end()).
4807         (path::_List::pop_back()): Define.
4808         (path::_List::_M_erase_from(const_iterator)): Define.
4809         (path::operator/=(const path&)): Use pop_back to remove last component
4810         and _M_erase_from to remove multiple components.
4811         (path::_M_append(basic_string_view<value_type>)): Likewise.
4812         (path::operator+=(const path&)): Likewise.
4813         (path::_M_concat(basic_string_view<value_type>)): Likewise.
4814         (path::remove_filename()): Likewise.
4815         (path::lexically_normal()): Use _List::_Impl iterators instead of
4816         path::iterator. Use pop_back to remove components from the end. Clear
4817         trailing filename, instead of using erase(const_iterator) to remove
4818         a non-final component.
4819         * testsuite/27_io/filesystem/path/generation/normal.cc: Test
4820         additional cases.
4821         * testsuite/27_io/filesystem/path/generation/normal2.cc: New test.
4822
4823         * src/filesystem/std-path.cc (path::operator+=(const path&)): Fix
4824         incorrect treatment of empty filename after trailing slash.
4825         * testsuite/27_io/filesystem/path/concat/path.cc: Test problem case.
4826
4827         * testsuite/21_strings/basic_string/modifiers/assign/char/
4828         move_assign_optim.cc: Avoid spurious failure when -fno-inline added
4829         to test flags.
4830         * testsuite/21_strings/basic_string/modifiers/assign/wchar_t/
4831         move_assign_optim.cc: Likewise.
4832
4833 2019-01-03  Jonathan Wakely  <jwakely@redhat.com>
4834             Jakub Jelinek  <jakub@redhat.com>
4835
4836         PR libstdc++/88607
4837         * include/experimental/memory: Replace UTF-8 quote characters.
4838         * include/std/future: Replace UTF-8 "em dash" characters.
4839
4840 2019-01-03  Jonathan Wakely  <jwakely@redhat.com>
4841
4842         PR libstdc++/88607
4843         * include/bits/forward_list.h: Replace UTF-8 "ligature fi" character.
4844         * include/debug/forward_list: Likewise.
4845         * include/experimental/bits/shared_ptr.h: Remove UTF-8 "section sign"
4846         character.
4847         * include/experimental/chrono: Likewise.
4848         * include/experimental/functional: Likewise.
4849         * include/experimental/ratio: Likewise.
4850         * include/experimental/system_error: Likewise.
4851         * include/experimental/tuple: Likewise.
4852         * include/experimental/type_traits: Likewise.
4853         * include/parallel/workstealing.h: Replace UTF-8 "en dash" character.
4854         * include/parallel/multiseq_selection.h: Likewise.
4855
4856         PR libstdc++/88681
4857         * config/abi/pre/gnu.ver: Add missing exports.
4858         * testsuite/22_locale/collate_byname/88681.cc: New test.
4859         * testsuite/22_locale/time_get/get/char/88681.cc: New test.
4860         * testsuite/22_locale/time_get/get/wchar_t/88681.cc: New test.
4861
4862 2019-01-02  Jonathan Wakely  <jwakely@redhat.com>
4863
4864         * testsuite/23_containers/map/cons/deduction.cc: Test deduction from
4865         initializer_list<value_type> and from input iterator ranges.
4866         * testsuite/23_containers/multimap/cons/deduction.cc: Likewise.
4867
4868         * testsuite/experimental/string_view/element_access/char/empty.cc:
4869         Fix year range in copyright header.
4870
4871 2019-01-02  Joel Brobecker  <brobecker@adacore.com>
4872
4873         * testsuite/21_strings/basic_string_view/element_access/char/empty.cc:
4874         Fix year range in copyright header.
4875
4876 2019-01-01  Jakub Jelinek  <jakub@redhat.com>
4877
4878         Update copyright years.
4879 \f
4880 Copyright (C) 2019 Free Software Foundation, Inc.
4881
4882 Copying and distribution of this file, with or without modification,
4883 are permitted in any medium without royalty provided the copyright
4884 notice and this notice are preserved.