libstdc++-v3/ChangeLog

   1 2019-08-20  Jonathan Wakely  <jwakely@redhat.com>
   2
   3         * doc/doxygen/user.cfg.in (INPUT): Remove profile mode headers.
   4
   5         * include/std/numeric (reduce): Fix Doxygen markup.
   6
   7         PR libstdc++/91371
   8         * include/std/type_traits (is_function): Simplify definition. Remove
   9         partial specializations for function types.
  10         (__is_referenceable): Simplify definition.
  11         * testsuite/20_util/bind/91371.cc: New test.
  12         * testsuite/20_util/is_function/91371.cc: New test.
  13         * testsuite/20_util/is_function/value.cc: Check more pointer types.
  14         * testsuite/20_util/is_member_function_pointer/91371.cc: New test.
  15         * testsuite/20_util/is_object/91371.cc: New test.
  16
  17 2019-08-16  Uros Bizjak  <ubizjak@gmail.com>
  18
  19         * config/abi/post/alpha-linux-gnu/baseline_symbols.txt: Update.
  20
  21 2019-08-15  Jonathan Wakely  <jwakely@redhat.com>
  22
  23         PR libstdc++/91456
  24         * include/bits/std_function.h (__check_func_return_type): Remove.
  25         (function::_Callable): Use std::__is_invocable_impl instead of
  26         __check_func_return_type.
  27         * include/std/type_traits (__is_invocable_impl): Add another defaulted
  28         template parameter. Define a separate partial specialization for
  29         INVOKE and INVOKE<void>. For INVOKE<R> replace is_convertible check
  30         with a check that models delayed temporary materialization.
  31         * testsuite/20_util/function/91456.cc: New test.
  32         * testsuite/20_util/is_invocable/91456.cc: New test.
  33
  34 2019-08-14  Jonathan Wakely  <jwakely@redhat.com>
  35
  36         * include/std/type_traits (__is_nullptr_t): Add deprecated attribute.
  37
  38 2019-08-14  Edward Smith-Rowland  <3dw4rd@verizon.net>
  39
  40         Implement C++20 p0879 - Constexpr for swap and swap related functions.
  41         * include/std/version (__cpp_lib_constexpr_swap_algorithms): New macro.
  42         * include/bits/algorithmfwd.h (__cpp_lib_constexpr_swap_algorithms):
  43         New macro.
  44         (iter_swap, make_heap, next_permutation, partial_sort_copy, pop_heap)
  45         (prev_permutation, push_heap, reverse, rotate, sort_heap, swap)
  46         (swap_ranges, nth_element, partial_sort, sort): Add constexpr.
  47         * include/bits/move.h (swap): Add constexpr.
  48         * include/bits/stl_algo.h (__move_median_to_first, __reverse, reverse)
  49         (__gcd, __rotate, rotate, __partition, __heap_select)
  50         (__partial_sort_copy, partial_sort_copy, __unguarded_partition)
  51         (__unguarded_partition_pivot, __partial_sort, __introsort_loop, __sort)
  52         (__introselect, __chunk_insertion_sort, next_permutation)
  53         (prev_permutation, partition, partial_sort, nth_element, sort)
  54         (__iter_swap::iter_swap, iter_swap, swap_ranges): Add constexpr.
  55         * include/bits/stl_algobase.h (__iter_swap::iter_swap, iter_swap)
  56         (swap_ranges): Add constexpr.
  57         * include/bits/stl_heap.h (__push_heap, push_heap, __adjust_heap,
  58         __pop_heap, pop_heap, __make_heap, make_heap, __sort_heap, sort_heap):
  59         Add constexpr.
  60         * include/std/type_traits (swap): Add constexpr.
  61         * testsuite/25_algorithms/headers/algorithm/synopsis.cc: Add constexpr.
  62         * testsuite/25_algorithms/iter_swap/constexpr.cc: New test.
  63         * testsuite/25_algorithms/make_heap/constexpr.cc: New test.
  64         * testsuite/25_algorithms/next_permutation/constexpr.cc: New test.
  65         * testsuite/25_algorithms/nth_element/constexpr.cc: New test.
  66         * testsuite/25_algorithms/partial_sort/constexpr.cc: New test.
  67         * testsuite/25_algorithms/partial_sort_copy/constexpr.cc: New test.
  68         * testsuite/25_algorithms/partition/constexpr.cc: New test.
  69         * testsuite/25_algorithms/pop_heap/constexpr.cc: New test.
  70         * testsuite/25_algorithms/prev_permutation/constexpr.cc: New test.
  71         * testsuite/25_algorithms/push_heap/constexpr.cc: New test.
  72         * testsuite/25_algorithms/reverse/constexpr.cc: New test.
  73         * testsuite/25_algorithms/rotate/constexpr.cc: New test.
  74         * testsuite/25_algorithms/sort/constexpr.cc: New test.
  75         * testsuite/25_algorithms/sort_heap/constexpr.cc: New test.
  76         * testsuite/25_algorithms/swap/constexpr.cc: New test.
  77         * testsuite/25_algorithms/swap_ranges/constexpr.cc: New test.
  78
  79 2019-08-12  Jonathan Wakely  <jwakely@redhat.com>
  80
  81         PR libstdc++/90361
  82         * src/c++17/string-inst.cc: Use _GLIBCXX_USE_CXX11_ABI=1 by default.
  83
  84         * include/std/tuple (__unpack_std_tuple): New variable template and
  85         partial specializations.
  86         (apply, make_from_tuple): Add noexcept-specifier.
  87         * testsuite/20_util/tuple/apply/2.cc: New test.
  88         * testsuite/20_util/tuple/make_from_tuple/2.cc: New test.
  89
  90 2019-08-09  Corentin Gay  <gay@adacore.com>
  91
  92         * testsuite/ext/random/beta_distribution/operators/serialize.cc,
  93         testsuite/ext/random/hypergeometric_distribution/operators/serialize.cc,
  94         testsuite/ext/random/normal_mv_distribution/operators/serialize.cc,
  95         testsuite/ext/random/triangular_distribution/operators/serialize.cc,
  96         testsuite/ext/random/von_mises_distribution/operators/serialize.cc:
  97         Add call to `VERIFY`.
  98
  99 2019-08-09  Alexandre Oliva <oliva@adacore.com>
 100
 101         * include/ext/random
 102         (normal_mv_distribution::param_type::param_type): New private
 103         ctor taking a decomposed varcov matrix, for use by...
 104         (operator>>): ... this, befriended.
 105         * include/ext/random.tcc (operator>>): Use it.
 106         (normal_mv_distribution::param_type::_M_init_lower): Adjust
 107         member function name in exception message.
 108
 109 2019-08-08  Jonathan Wakely  <jwakely@redhat.com>
 110
 111         P0325R4 to_array from LFTS with updates
 112         * include/experimental/array (to_array): Qualify call to __to_array.
 113         * include/std/array (__cpp_lib_to_array, to_array): Define for C++20.
 114         * include/std/version (__cpp_lib_to_array): Likewise.
 115         * testsuite/23_containers/array/creation/1.cc: New test.
 116         * testsuite/23_containers/array/creation/2.cc: New test.
 117         * testsuite/23_containers/array/creation/3_neg.cc: New test.
 118         * testsuite/23_containers/array/tuple_interface/tuple_element_neg.cc:
 119         Use zero for dg-error line number.
 120
 121 2019-08-06  Jonathan Wakely  <jwakely@redhat.com>
 122
 123         P1651R0 bind_front should not unwrap reference_wrapper
 124         * include/std/functional (bind_front): Don't unwrap reference_wrapper.
 125         * include/std/version (__cpp_lib_bind_front): Update value.
 126         * testsuite/20_util/function_objects/bind_front/1.cc: Fix test for
 127         feature test macro.
 128         * testsuite/20_util/function_objects/bind_front/2.cc: New test.
 129
 130         * include/std/numbers [!__STRICT_ANSI__ && _GLIBCXX_USE_FLOAT128]
 131         (e_v, log2e_v, log10e_v, pi_v, inv_pi_v, inv_sqrtpi_v, ln2_v, ln10_v)
 132         (sqrt2_v, sqrt3_v, inv_sqrt3, egamma_v, phi_v): Add explicit
 133         specializations for __float128.
 134         * testsuite/26_numerics/numbers/float128.cc: New test.
 135
 136 2019-08-04  Gerald Pfeifer  <gerald@pfeifer.com>
 137
 138         * doc/xml/manual/documentation_hacking.xml: doxygen.org is now
 139         doxygen.nl.
 140
 141 2019-08-01  Edward Smith-Rowland  <3dw4rd@verizon.net>
 142
 143         Implement C++20 p0202 - Add Constexpr Modifiers to Functions
 144         in <algorithm> and <utility> Headers.
 145         Implement C++20 p1023 - constexpr comparison operators for std::array.
 146         * include/bits/algorithmfwd.h (all_of, any_of, binary_search, copy,
 147         copy_backward, copy_if, copy_n, equal_range, fill, find_end,
 148         find_if_not, includes, is_heap, is_heap_until, is_partitioned,
 149         is_permutation, is_sorted, is_sorted_until, iter_swap, lower_bound,
 150         none_of, partition_copy, partition_point, remove, remove_if,
 151         remove_copy, remove_copy_if, replace_copy, replace_copy_if,
 152         reverse_copy, rotate_copy, uunique, upper_bound, adjacent_find, count,
 153         count_if, equal, find, find_first_of, find_if, for_each, generate,
 154         generate_n, lexicographical_compare, merge, mismatch, replace,
 155         replace_if, search, search_n, set_difference, set_intersection,
 156         set_symmetric_difference, set_union, transform, unique_copy):
 157         Mark constexpr.
 158         * include/bits/cpp_type_traits.h (__miter_base): Mark constexpr.
 159         * include/bits/predefined_ops.h (_Iter_less_val::operator(),
 160         _Val_less_iter::operator(), _Iter_equal_to_iter::operator(),
 161         _Iter_equal_to_val::operator(), _Iter_equals_val::operator()):
 162          Use const ref instead of ref arg;
 163         (_Iter_less_val, __iter_less_val, _Val_less_iter, __val_less_iter,
 164         __iter_equal_to_iter, __iter_equal_to_val, __iter_comp_val,
 165         _Iter_comp_val, _Val_comp_iter, __val_comp_iter, __iter_equals_val,
 166         _Iter_equals_iter, __iter_comp_iter, _Iter_pred, __pred_iter,
 167         _Iter_comp_to_val, __iter_comp_val, _Iter_comp_to_iter,
 168         __iter_comp_iter): Mark constexpr.
 169         * include/bits/stl_algo.h (__find_if, __find_if_not, __find_if_not_n,
 170         __search, __search_n_aux, __search_n, __find_end, find_end, all_of,
 171         none_of, any_of, find_if_not, is_partitioned, partition_point,
 172         __remove_copy_if, remove_copy, remove_copy_if, copy_if, __copy_n,
 173         copy_n, partition_copy, __remove_if, remove, remove_if, __adjacent_find,
 174         __unique, unique, __unique_copy, reverse_copy, rotate_copy,
 175         __unguarded_linear_insert, __insertion_sort, __unguarded_insertion_sort,
 176         __final_insertion_sort, lower_bound, __upper_bound, upper_bound,
 177         __equal_range, equal_range, binary_search, __includes, includes,
 178         __next_permutation, __prev_permutation, __replace_copy_if, replace_copy,
 179         replace_copy_if, __count_if, is_sorted, __is_sorted_until,
 180         is_sorted_until, __is_permutation, is_permutation, for_each, find,
 181         find_if, find_first_of, adjacent_find, count, count_if, search,
 182         search_n, transform, replace, replace_if, generate, generate_n,
 183         unique_copy, __merge, merge, __set_union, set_union, __set_intersection,
 184         set_intersection, __set_difference, set_difference,
 185         __set_symmetric_difference, set_symmetric_difference):  Mark constexpr.
 186         * include/bits/stl_algobase.h (__memmove, __memcmp): New maybe constexpr
 187         wrappers around __builtin_memmove and __builtin_memcmp
 188         respectively;
 189         (__niter_base, __niter_wrap, __copy_m, __copy_move_a, __copy_move_a2,
 190         copy, move, __copy_move_b, __copy_move_backward_a,
 191         __copy_move_backward_a2, copy_backward, move_backward, __fill_a, fill,
 192         __fill_n_a, fill_n, equal, __lc_rai::__newlast1, __lc_rai::__cnd2,
 193         __lexicographical_compare_impl, __lexicographical_compare,
 194         __lexicographical_compare<true>::__lc, __lexicographical_compare_aux,
 195         __lower_bound, lower_bound, equal, __equal4, lexicographical_compare,
 196         __mismatch, mismatch, __is_heap_until, __is_heap, is_heap_until,
 197         is_heap): Mark constexpr.
 198         * include/bits/stl_heap.h (__is_heap_until, __is_heap, is_heap_until,
 199         is_heap): Mark constexpr.
 200         * include/bits/stl_iterator.h (__niter_base, __miter_base): Mark constexpr.
 201         * include/std/array: Make comparison ops constexpr.
 202         * include/std/utility: Make exchange constexpr.
 203         * include/std/version (__cpp_lib_constexpr_algorithms): New macro.
 204         * testsuite/23_containers/array/tuple_interface/get_neg.cc: Adjust.
 205         * testsuite/23_containers/array/tuple_interface/
 206         tuple_element_neg.cc: Adjust.
 207         * testsuite/20_util/exchange/constexpr.cc: New.
 208         * testsuite/23_containers/array/comparison_operators/constexpr.cc: New.
 209         * testsuite/25_algorithms/constexpr_macro.cc: New.
 210         * testsuite/25_algorithms/adjacent_find/constexpr.cc: New.
 211         * testsuite/25_algorithms/all_of/constexpr.cc: New.
 212         * testsuite/25_algorithms/any_of/constexpr.cc: New.
 213         * testsuite/25_algorithms/binary_search/constexpr.cc: New.
 214         * testsuite/25_algorithms/copy/constexpr.cc: New.
 215         * testsuite/25_algorithms/copy_backward/constexpr.cc: New.
 216         * testsuite/25_algorithms/copy_if/constexpr.cc: New.
 217         * testsuite/25_algorithms/copy_n/constexpr.cc: New.
 218         * testsuite/25_algorithms/count/constexpr.cc: New.
 219         * testsuite/25_algorithms/count_if/constexpr.cc: New.
 220         * testsuite/25_algorithms/equal/constexpr.cc: New.
 221         * testsuite/25_algorithms/equal_range/constexpr.cc: New.
 222         * testsuite/25_algorithms/fill/constexpr.cc: New.
 223         * testsuite/25_algorithms/fill_n/constexpr.cc: New.
 224         * testsuite/25_algorithms/find/constexpr.cc: New.
 225         * testsuite/25_algorithms/find_end/constexpr.cc: New.
 226         * testsuite/25_algorithms/find_first_of/constexpr.cc: New.
 227         * testsuite/25_algorithms/find_if/constexpr.cc: New.
 228         * testsuite/25_algorithms/find_if_not/constexpr.cc: New.
 229         * testsuite/25_algorithms/for_each/constexpr.cc: New.
 230         * testsuite/25_algorithms/generate/constexpr.cc: New.
 231         * testsuite/25_algorithms/generate_n/constexpr.cc: New.
 232         * testsuite/25_algorithms/is_heap/constexpr.cc: New.
 233         * testsuite/25_algorithms/is_heap_until/constexpr.cc: New.
 234         * testsuite/25_algorithms/is_partitioned/constexpr.cc: New.
 235         * testsuite/25_algorithms/is_permutation/constexpr.cc: New.
 236         * testsuite/25_algorithms/is_sorted/constexpr.cc: New.
 237         * testsuite/25_algorithms/is_sorted_until/constexpr.cc: New.
 238         * testsuite/25_algorithms/lexicographical_compare/constexpr.cc: New.
 239         * testsuite/25_algorithms/lower_bound/constexpr.cc: New.
 240         * testsuite/25_algorithms/merge/constexpr.cc: New.
 241         * testsuite/25_algorithms/mismatch/constexpr.cc: New.
 242         * testsuite/25_algorithms/none_of/constexpr.cc: New.
 243         * testsuite/25_algorithms/partition_copy/constexpr.cc: New.
 244         * testsuite/25_algorithms/partition_point/constexpr.cc: New.
 245         * testsuite/25_algorithms/remove/constexpr.cc: New.
 246         * testsuite/25_algorithms/remove_copy/constexpr.cc: New.
 247         * testsuite/25_algorithms/remove_copy_if/constexpr.cc: New.
 248         * testsuite/25_algorithms/remove_if/constexpr.cc: New.
 249         * testsuite/25_algorithms/replace_copy/constexpr.cc: New.
 250         * testsuite/25_algorithms/replace_copy_if/constexpr.cc: New.
 251         * testsuite/25_algorithms/replace_if/constexpr.cc: New.
 252         * testsuite/25_algorithms/reverse_copy/constexpr.cc: New.
 253         * testsuite/25_algorithms/rotate_copy/constexpr.cc: New.
 254         * testsuite/25_algorithms/search/constexpr.cc: New.
 255         * testsuite/25_algorithms/search_n/constexpr.cc: New.
 256         * testsuite/25_algorithms/set_difference/constexpr.cc: New.
 257         * testsuite/25_algorithms/set_intersection/constexpr.cc: New.
 258         * testsuite/25_algorithms/set_symmetric_difference/constexpr.cc: New.
 259         * testsuite/25_algorithms/set_union/constexpr.cc: New.
 260         * testsuite/25_algorithms/transform/constexpr.cc: New.
 261         * testsuite/25_algorithms/unique/constexpr.cc: New.
 262         * testsuite/25_algorithms/unique_copy/constexpr.cc: New.
 263         * testsuite/25_algorithms/upper_bound/constexpr.cc: New.
 264
 265 2019-07-31  Jonathan Wakely  <jwakely@redhat.com>
 266
 267         * include/std/memory (make_obj_using_allocator): Qualify call to
 268         uses_allocator_construction_args.
 269
 270         P0631R4 Math Constants
 271         * include/Makefile.am: Add new header.
 272         * include/Makefile.in: Regenerate.
 273         * include/precompiled/stdc++.h: Include new header.
 274         * include/std/numbers: New header.
 275         * include/std/version (__cpp_lib_math_constants): Define.
 276         * testsuite/26_numerics/numbers/1.cc: New test.
 277         * testsuite/26_numerics/numbers/2.cc: New test.
 278         * testsuite/26_numerics/numbers/3.cc: New test.
 279         * testsuite/26_numerics/numbers/nonfloat_neg.cc: New test.
 280
 281         * include/std/bit: Add Doxygen comments.
 282
 283         PR libstdc++/91308
 284         * include/bits/unique_ptr.h (unique_ptr::__safe_conversion_up): Remove
 285         constraints on deleter that should only apply to the constructor.
 286         (unique_ptr<T[], D>::__safe_conversion_up): Likewise.
 287         (unique_ptr<T[], D>::unique_ptr(unique_ptr<U, D>&&)): Restore
 288         constraints on deleter here.
 289         * testsuite/20_util/unique_ptr/assign/91308.cc: New test.
 290
 291 2019-07-29  Jonathan Wakely  <jwakely@redhat.com>
 292
 293         PR libstdc++/51333
 294         * libsupc++/cxxabi.h (__gnu_cxx::recursive_init_error): Do not define
 295         constructor inline.
 296         * libsupc++/guard_error.cc (__gnu_cxx::recursive_init_error): Define
 297         constructor.
 298         * testsuite/18_support/51333.cc: New test.
 299
 300 2019-07-28  Gerald Pfeifer  <gerald@pfeifer.com>
 301
 302         * doc/xml/manual/documentation_hacking.xml: Fix broken reference
 303         to the Doxygen manual. Avoid a "here" link on the way.
 304         Fix another broken link to Doxygen docblocks.
 305
 306 2019-07-26  Jonathan Wakely  <jwakely@redhat.com>
 307
 308         * include/std/bit (__cpp_lib_endian): Define.
 309         * include/std/version (__cpp_lib_endian): Define.
 310         * testsuite/26_numerics/endian/2.cc: New.
 311         * testsuite/26_numerics/endian/3.cc: New.
 312         * testsuite/26_numerics/endian/4.cc: New.
 313
 314 2019-07-26  François Dumont  <fdumont@gcc.gnu.org>
 315
 316         * testsuite/util/testsuite_iterators.h
 317         (bidirectional_iterator_wrapper): Fix type comment.
 318         (random_access_iterator_wrapper): Likewise.
 319
 320 2019-07-25  Jonathan Wakely  <jwakely@redhat.com>
 321
 322         * include/std/bit (endian): Move definition here as per P1612R1.
 323         * include/std/type_traits (endian): Remove definition from here.
 324         * testsuite/20_util/endian/1.cc: Rename to ...
 325         * testsuite/26_numerics/endian/1.cc: ... here. Adjust header.
 326
 327 2019-07-25  Martin Liska  <mliska@suse.cz>
 328             Dominik Infuhr  <dominik.infuehr@theobroma-systems.com>
 329
 330         PR c++/23383
 331         * testsuite/ext/bitmap_allocator/check_delete.cc: Add
 332         -fno-allocation-dce.
 333         * testsuite/ext/bitmap_allocator/check_new.cc: Likewise.
 334         * testsuite/ext/new_allocator/check_delete.cc: Likewise.
 335         * testsuite/ext/new_allocator/check_new.cc: Likewise.
 336
 337 2019-07-22  Jonathan Wakely  <jwakely@redhat.com>
 338
 339         * testsuite/26_numerics/bit/bitops.count/*: Rename to ...
 340         * testsuite/26_numerics/bit/bit.count/*: Here.
 341
 342         * include/std/bit (__rotl, __rotr): Change second parameter from
 343         unsigned int to int and handle negative values.
 344         (rotl, rotr): Remove check for __STRICT_ANSI__. Change second
 345         parameter from unsigned int to int. Add nodiscard attribute.
 346         * testsuite/26_numerics/bit/bitops.rot/rotl.cc: Rename to ...
 347         * testsuite/26_numerics/bit/bit.rotate/rotl.cc: Here. Test negative
 348         shifts.
 349         * testsuite/26_numerics/bit/bitops.rot/rotr.cc: Rename to ...
 350         * testsuite/26_numerics/bit/bit.rotate/rotr.cc: Here. Test negative
 351         shifts.
 352
 353         * include/std/bit (__ceil2): Make unrepresentable results undefined,
 354         as per P1355R2. Add debug assertion. Perform one left shift, not two,
 355         so that out of range values cause undefined behaviour. Ensure that
 356         shift will still be undefined if left operand is promoted.
 357         * testsuite/26_numerics/bit/bit.pow.two/ceil2.cc: Replace checks for
 358         unrepresentable values with checks that they are not core constant
 359         expressions.
 360         * testsuite/26_numerics/bit/bit.pow.two/ceil2_neg.cc: New test.
 361
 362 2019-07-19  François Dumont  <fdumont@gcc.gnu.org>
 363
 364         * include/bits/stl_tempbuf.h (__detail::__return_temporary_buffer): Fix
 365         sized deallocation size computation.
 366
 367 2019-07-19  Andreas Schwab  <schwab@linux-m68k.org>
 368
 369         * config/abi/post/m68k-linux-gnu/baseline_symbols.txt: Update.
 370
 371 2019-07-18  François Dumont  <fdumont@gcc.gnu.org>
 372
 373         * include/bits/stl_tempbuf.h (__detail::__return_temporary_buffer): New.
 374         (~_Temporary_buffer()): Use latter.
 375         (_Temporary_buffer(_FIterator, size_type)): Likewise.
 376
 377 2019-07-17  Andreas Schwab  <schwab@suse.de>
 378
 379         * config/abi/post/ia64-linux-gnu/baseline_symbols.txt: Update.
 380
 381 2019-07-16  Jason Merrill  <jason@redhat.com>
 382
 383         * include/std/memory (uses_allocator_construction_args): Add parens
 384         around constraint.
 385
 386 2019-07-12  Jonathan Wakely  <jwakely@redhat.com>
 387
 388         * testsuite/29_atomics/atomic_float/1.cc: Fix comment.
 389
 390         * include/experimental/string_view (__detail::__idt): Remove.
 391         (operator==, operator!=, operator<, operator>, operator<=, operator>=):
 392         Use __type_identity_t instead of __detail::__idt;
 393         * include/std/string_view (__detail::__idt): Remove.
 394         (operator==, operator!=, operator<, operator>, operator<=, operator>=):
 395         Use __type_identity_t instead of __detail::__idt;
 396         * include/std/type_traits (__type_identity_t): New alias template.
 397
 398         * doc/xml/manual/status_cxx2020.xml: Update status for atomic_ref
 399         and floating point atomics.
 400
 401 2019-07-11  Jonathan Wakely  <jwakely@redhat.com>
 402
 403         * doc/xml/manual/configure.xml: Improve documentation of
 404         --enable-libstdcxx-time option.
 405
 406         * include/bits/atomic_base.h (__atomic_impl): New namespace for
 407         wrappers around atomic built-ins.
 408         (__atomic_float, __atomic_ref): New class templates for use as base
 409         classes.
 410         * include/std/atomic (atomic<float>, atomic<double>)
 411         (atomic<long double>): New explicit specializations.
 412         (atomic_ref): New class template.
 413         (__cpp_lib_atomic_ref): Define.
 414         * include/std/version (__cpp_lib_atomic_ref): Define.
 415         * testsuite/29_atomics/atomic/60695.cc: Adjust dg-error.
 416         * testsuite/29_atomics/atomic_float/1.cc: New test.
 417         * testsuite/29_atomics/atomic_float/requirements.cc: New test.
 418         * testsuite/29_atomics/atomic_ref/deduction.cc: New test.
 419         * testsuite/29_atomics/atomic_ref/float.cc: New test.
 420         * testsuite/29_atomics/atomic_ref/generic.cc: New test.
 421         * testsuite/29_atomics/atomic_ref/integral.cc: New test.
 422         * testsuite/29_atomics/atomic_ref/pointer.cc: New test.
 423         * testsuite/29_atomics/atomic_ref/requirements.cc: New test.
 424
 425 2019-07-06  Jonathan Wakely  <jwakely@redhat.com>
 426
 427         * include/ext/atomicity.h (__exchange_and_add, __atomic_add): Replace
 428         throw() with _GLIBCXX_NOTHROW.
 429         (__atomic_add_dispatch): Return after performing atomic increment.
 430
 431 2019-07-05  Jonathan Wakely  <jwakely@redhat.com>
 432
 433         * include/ext/atomicity.h [_GLIBCXX_ATOMIC_BUILTINS] (__atomic_add)
 434         (__exchange_and_add): Replace static specifier with always_inline
 435         attribute.
 436         (__exchange_and_add_single, __atomic_add_single): Likewise.
 437         (__exchange_and_add_dispatch, __atomic_add_dispatch): Likewise. Also
 438         combine !__gthread_active_p() and !__GTHREADS branches.
 439
 440 2019-07-03  Jonathan Wakely  <jwakely@redhat.com>
 441
 442         PR libstdc++/91067
 443         * acinclude.m4 (libtool_VERSION): Bump to 6:27:0.
 444         * configure: Regenerate.
 445         * config/abi/pre/gnu.ver (GLIBCXX_3.4.27): Add new version. Export
 446         missing symbols.
 447         * testsuite/27_io/filesystem/iterators/91067.cc: New test.
 448         * testsuite/util/testsuite_abi.cc: Add new symbol version.
 449
 450 2019-07-02  Jonathan Wakely  <jwakely@redhat.com>
 451
 452         * include/bits/c++config (_GLIBCXX_HAVE_BUILTIN_LAUNDER)
 453         (_GLIBCXX_HAVE_BUILTIN_IS_CONSTANT_EVALUATED): Use __has_builtin
 454         instead of __is_identifier to detect Clang support.
 455
 456 2019-07-02  Jim Wilson  <jimw@sifive.com>
 457
 458         * configure.ac (BUILD_PDF): Also test for doxygen, dot, xsltproc,
 459         and xmllint.
 460         * configure: Regenerate.
 461
 462 2019-06-27  Jonathan Wakely  <jwakely@redhat.com>
 463
 464         PR libstdc++/91012
 465         * src/c++17/fs_path.cc (filesystem_error::_Impl): Use a string_view
 466         for the what_arg parameters.
 467         (filesystem_error::filesystem_error): Pass system_error::what() to
 468         the _Impl constructor.
 469         * testsuite/27_io/filesystem/filesystem_error/cons.cc: Ensure that
 470         filesystem_error::what() contains system_error::what().
 471
 472 2019-06-26  Jonathan Wakely  <jwakely@redhat.com>
 473
 474         * include/std/charconv (chars_format): Define bitmask type.
 475         * testsuite/20_util/to_chars/chars_format.cc: New test.
 476
 477         * include/bits/fs_path.h (path::__is_encoded_char): Use __is_one_of.
 478         * include/std/bit (_If_is_unsigned_integer_type): Remove.
 479         (_If_is_unsigned_integer): Use __is_unsigned_integer.
 480         (rotl(byte, unsigned), rotr(byte, unsigned), countl_zero(byte))
 481         (countl_one(byte), countr_zero(byte), countr_one(byte))
 482         (popcount(byte), ispow2(byte), ceil2(byte), floor2(byte))
 483         (log2p1(byte)): Remove.
 484         * include/std/charconv (__detail::__is_one_of): Move to <type_traits>.
 485         (__detail::__is_int_to_chars_type): Remove.
 486         (__detail::__integer_to_chars_result_type): Use __is_signed_integer
 487         and __is_unsigned_integer.
 488         * include/std/type_traits (__is_one_of): Move here from <charconv>.
 489         (__is_signed_integer, __is_unsigned_integer): New helpers.
 490         * testsuite/26_numerics/bit/bit.pow.two/ceil2.cc: Remove test for
 491         std::byte overload.
 492         * testsuite/26_numerics/bit/bit.pow.two/floor2.cc: Likewise.
 493         * testsuite/26_numerics/bit/bit.pow.two/ispow2.cc: Likewise.
 494         * testsuite/26_numerics/bit/bit.pow.two/log2p1.cc: Likewise.
 495         * testsuite/26_numerics/bit/bitops.count/countl_one.cc: Likewise.
 496         * testsuite/26_numerics/bit/bitops.count/countl_zero.cc: Likewise.
 497         * testsuite/26_numerics/bit/bitops.count/countr_one.cc: Likewise.
 498         * testsuite/26_numerics/bit/bitops.count/countr_zero.cc: Likewise.
 499         * testsuite/26_numerics/bit/bitops.count/popcount.cc: Likewise.
 500         * testsuite/26_numerics/bit/bitops.rot/rotl.cc: Likewise.
 501         * testsuite/26_numerics/bit/bitops.rot/rotr.cc: Likewise.
 502
 503 2019-06-25  Jonathan Wakely  <jwakely@redhat.com>
 504
 505         * include/std/numeric (midpoint(T, T)): Avoid std::abs in constexpr
 506         function.
 507
 508 2019-06-25  Jakub Jelinek  <jakub@redhat.com>
 509
 510         * include/pstl/pstl_config.h (_PSTL_PRAGMA_SIMD_SCAN,
 511         _PSTL_PRAGMA_SIMD_INCLUSIVE_SCAN, _PSTL_PRAGMA_SIMD_EXCLUSIVE_SCAN):
 512         Define to OpenMP 5.0 pragmas even for GCC 10.0+.
 513         (_PSTL_UDS_PRESENT): Define to 1 for GCC 10.0+.
 514
 515 2019-06-24  Jonathan Wakely  <jwakely@redhat.com>
 516
 517         * include/std/numeric (midpoint(T, T)): Change implementation for
 518         floating-point types to avoid incorrect rounding of denormals.
 519         * testsuite/26_numerics/midpoint/floating.cc: Add check for correct
 520         rounding with denormals.
 521         * testsuite/26_numerics/gcd/gcd_neg.cc: Adjust dg-error line numbers.
 522         * testsuite/26_numerics/lcm/lcm_neg.cc: Likewise.
 523
 524         * testsuite/18_support/headers/cfloat/values_c++17.cc: New test.
 525
 526 2019-06-20  Jonathan Wakely  <jwakely@redhat.com>
 527
 528         * acinclude.m4 (GLIBCXX_ENABLE_DEBUG): Only do debug build for final
 529         stage of bootstrap.
 530         * configure: Regenerate.
 531
 532         * include/std/variant (_Variant_storage, _Extra_visit_slot_needed):
 533         Qualify calls to __never_valueless.
 534
 535         * doc/xml/manual/status_cxx2017.xml: Fix outdated reference to
 536         C++17 working draft.
 537
 538         * testsuite/libstdc++-prettyprinters/simple.cc: Use non-palindromic
 539         vector<bool> for test.
 540         * testsuite/libstdc++-prettyprinters/simple11.cc: Likewise.
 541
 542 2019-06-19  Jonathan Wakely  <jwakely@redhat.com>
 543
 544         * include/bits/stream_iterator.h (istream_iterator::_M_equal()): Make
 545         private.
 546         (istream_iterator::_M_read()): Do not check stream state before
 547         attempting extraction. Set stream pointer to null when extraction
 548         fails (P0738R2).
 549         (operator==(const istream_iterator&, const istream_iterator&)): Change
 550         to be a hidden friend of istream_iterator.
 551         (operator!=(const istream_iterator&, const istream_iterator&)):
 552         Likewise.
 553         (ostream_iterator::ostream_iterator()): Add default constructor.
 554         (ostream_iterator::ostream_iterator(ostream_type*, const C*)): Use
 555         addressof.
 556         * testsuite/24_iterators/istream_iterator/1.cc: New test.
 557         * testsuite/24_iterators/ostream_iterator/1.cc: New test.
 558         * testsuite/24_iterators/ostream_iterator/70766.cc: Also check
 559         constructor taking a string.
 560         * testsuite/24_iterators/ostream_iterator/requirements/constexpr.cc:
 561         New test.
 562
 563 2019-06-19  Michael Weghorn  <m.weghorn@posteo.de>
 564             Jonathan Wakely  <jwakely@redhat.com>
 565
 566         PR libstdc++/90945
 567         * python/libstdcxx/v6/printers.py (StdVectorPrinter._iterator): Use
 568         values of type bool for vector<bool> elements.
 569         * testsuite/libstdc++-prettyprinters/simple.cc: Test vector<bool>.
 570         * testsuite/libstdc++-prettyprinters/simple11.cc: Likewise.
 571
 572 2019-06-19  Jonathan Wakely  <jwakely@redhat.com>
 573
 574         PR libstdc++/90920 partially revert r263433
 575         * include/bits/stl_algo.h (__rotate): Restore checks for empty ranges.
 576         (rotate): Remove checks.
 577         * testsuite/25_algorithms/rotate/90920.cc: New test.
 578
 579         * include/std/numeric (reduce(Iter, Iter, T, BinOp)): Fix value
 580         category used in invocable check.
 581         (reduce(Iter, Iter, T)): Pass initial value as rvalue.
 582         * testsuite/26_numerics/reduce/2.cc: New test.
 583
 584 2019-06-18  Jonathan Wakely  <jwakely@redhat.com>
 585
 586         * include/bits/algorithmfwd.h: Change title of doc group.
 587         * include/bits/stl_algo.h (for_each_n): Add new C++17 algorithm from
 588         P0024R2.
 589         * include/bits/stl_numeric.h: Define doc group and add algos to it.
 590         * include/std/numeric (__is_random_access_iter): New internal trait.
 591         (reduce, transform_reduce, exclusive_scan, inclusive_scan)
 592         (transform_exclusive_scan, transform_inclusive_scan): Likewise.
 593         * testsuite/25_algorithms/for_each/for_each_n.cc: New test.
 594         * testsuite/26_numerics/exclusive_scan/1.cc: New test.
 595         * testsuite/26_numerics/inclusive_scan/1.cc: New test.
 596         * testsuite/26_numerics/reduce/1.cc: New test.
 597         * testsuite/26_numerics/transform_exclusive_scan/1.cc: New test.
 598         * testsuite/26_numerics/transform_inclusive_scan/1.cc: New test.
 599         * testsuite/26_numerics/transform_reduce/1.cc: New test.
 600         * testsuite/util/testsuite_iterators.h (test_container::size()): New
 601         member function.
 602
 603         * include/c_global/cstddef (std::byte): Perform arithmetic operations
 604         in unsigned int to avoid promotion (LWG 2950).
 605
 606 2019-06-17  Jonathan Wakely  <jwakely@redhat.com>
 607
 608         * testsuite/20_util/allocator/1.cc: Add sized delete, which fixes a
 609         failure on AIX.
 610
 611         * include/c_global/cmath (__lerp, lerp): Add noexcept (LWG 3201).
 612
 613         PR libstdc++/90281 Fix string conversions for filesystem::path
 614         * include/bits/fs_path.h (u8path) [_GLIBCXX_FILESYSTEM_IS_WINDOWS]:
 615         Use codecvt_utf8_utf16 instead of codecvt_utf8. Use
 616         __str_codecvt_in_all to fail for partial conversions and throw on
 617         error.
 618         [!_GLIBCXX_FILESYSTEM_IS_WINDOWS && _GLIBCXX_USE_CHAR8_T]
 619         (path::_Cvt<char8_t>): Add explicit specialization.
 620         [_GLIBCXX_FILESYSTEM_IS_WINDOWS] (path::_Cvt::_S_wconvert): Remove
 621         overloads.
 622         [_GLIBCXX_FILESYSTEM_IS_WINDOWS] (path::_Cvt::_S_convert): Use
 623         if-constexpr instead of dispatching to _S_wconvert. Use codecvt
 624         instead of codecvt_utf8. Use __str_codecvt_in_all and
 625         __str_codecvt_out_all.
 626         [!_GLIBCXX_FILESYSTEM_IS_WINDOWS] (path::_Cvt::_S_convert): Use
 627         codecvt instead of codecvt_utf8. Use __str_codecvt_out_all.
 628         (path::_S_str_convert) [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Use
 629         codecvt_utf8_utf16 instead of codecvt_utf8. Construct return values
 630         with allocator. Use __str_codecvt_out_all. Fallthrough to POSIX code
 631         after converting to UTF-8.
 632         (path::_S_str_convert): Use codecvt instead of codecvt_utf8. Use
 633         __str_codecvt_in_all.
 634         (path::string): Fix initialization of string types with different
 635         allocators.
 636         (path::u8string) [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Use
 637         codecvt_utf8_utf16 instead of codecvt_utf8. Use __str_codecvt_out_all.
 638         * include/bits/locale_conv.h (__do_str_codecvt): Reorder static and
 639         runtime conditions.
 640         (__str_codecvt_out_all, __str_codecvt_in_all): New functions that
 641         return false for partial conversions.
 642         * include/experimental/bits/fs_path.h (u8path):
 643         [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Implement correctly for mingw.
 644         [_GLIBCXX_FILESYSTEM_IS_WINDOWS] (path::_Cvt::_S_wconvert): Add
 645         missing handling for char8_t. Use codecvt and codecvt_utf8_utf16
 646         instead of codecvt_utf8. Use __str_codecvt_in_all and
 647         __str_codecvt_out_all.
 648         [!_GLIBCXX_FILESYSTEM_IS_WINDOWS] (path::_Cvt::_S_convert): Use
 649         codecvt instead of codecvt_utf8. Use __str_codecvt_out_all.
 650         (path::string) [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Use
 651         codecvt_utf8_utf16 instead of codecvt_utf8. Construct return values
 652         with allocator. Use __str_codecvt_out_all and __str_codecvt_in_all.
 653         (path::string) [!_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Use
 654         __str_codecvt_in_all.
 655         (path::u8string) [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Use
 656         codecvt_utf8_utf16 instead of codecvt_utf8. Use __str_codecvt_out_all.
 657         * src/c++17/fs_path.cc (path::_S_convert_loc): Use
 658         __str_codecvt_in_all.
 659         * src/filesystem/path.cc (path::_S_convert_loc): Likewise.
 660         * testsuite/27_io/filesystem/path/construct/90281.cc: New test.
 661         * testsuite/27_io/filesystem/path/factory/u8path.cc: New test.
 662         * testsuite/27_io/filesystem/path/native/string.cc: Test with empty
 663         strings and with Unicode characters outside the basic multilingual
 664         plane.
 665         * testsuite/27_io/filesystem/path/native/alloc.cc: New test.
 666         * testsuite/experimental/filesystem/path/construct/90281.cc: New test.
 667         * testsuite/experimental/filesystem/path/factory/u8path.cc: New test.
 668         * testsuite/experimental/filesystem/path/native/alloc.cc: New test.
 669         * testsuite/experimental/filesystem/path/native/string.cc: Test with
 670         empty strings and with Unicode characters outside the basic
 671         multilingual plane.
 672
 673 2019-06-17  François Dumont  <fdumont@gcc.gnu.org>
 674             Jonathan Wakely  <jwakely@redhat.com>
 675
 676         * include/bits/hashtable.h (struct _Hashtable::_Scoped_node): New type.
 677         (_Hashtable::_M_insert_unique_node): Add key_type parameter. Don't
 678         deallocate node if insertion fails.
 679         (_Hashtable::_M_insert_multi_node): Likewise.
 680         (_Hashtable::_M_reinsert_node): Pass additional key argument.
 681         (_Hashtable::_M_reinsert_node_multi): Likewise. Remove FIXME.
 682         (_Hashtable::_M_extract_node(size_t, __node_base*)): New function.
 683         (_Hashtable::extract(const_iterator)): Use _M_extract_node.
 684         (_Hashtable::extract(const _Key&)): Likewise.
 685         (_Hashtable::_M_merge_unique): Pass additional key argument.
 686         (_Hashtable::_M_emplace<Args>(true_type, Args&&...)): Likewise. Use
 687         _Scoped_node.
 688         (_Hashtable::_M_insert): Likewise.
 689         * include/bits/hashtable_policy.h (_Map_base::operator[]): Likewise.
 690         (_Hashtable_alloc): Add comments to functions with misleading names.
 691
 692 2019-06-17  Jonathan Wakely  <jwakely@redhat.com>
 693
 694         * testsuite/20_util/bad_function_call/what.cc: Include <string> header
 695         for std::string.
 696         * testsuite/20_util/shared_ptr/cons/weak_ptr_expired.cc: Likewise.
 697         * testsuite/20_util/tuple/cons/allocator_with_any.cc: Include <memory>
 698         header for std::allocator.
 699         * testsuite/23_containers/array/tuple_interface/tuple_element.cc: Add
 700         using-declaration for std::size_t.
 701         * testsuite/23_containers/array/tuple_interface/tuple_size.cc:
 702         Likewise.
 703         * testsuite/23_containers/deque/cons/55977.cc: Include <istream> for
 704         std::istream.
 705         * testsuite/23_containers/vector/cons/55977.cc: Likewise.
 706         * testsuite/experimental/map/erasure.cc: Include <string> for
 707         std::string.
 708         * testsuite/experimental/unordered_map/erasure.cc: Likewise.
 709
 710 2019-06-14  Jonathan Wakely  <jwakely@redhat.com>
 711
 712         * include/experimental/type_traits (experimental::nonesuch): Use
 713         pragma to disable -Wctor-dtor-privacy warnings.
 714         * include/std/type_traits (__is_convertible_helper<From, To, false>)
 715         (__is_nt_convertible_helper<From, To, false>, __nonesuch): Likewise.
 716
 717         * include/std/version (__cpp_lib_bind_front): Add missing macro.
 718
 719 2019-06-12  Jonathan Wakely  <jwakely@redhat.com>
 720
 721         * include/std/algorithm (__cpp_lib_parallel_algorithm): Fix value.
 722         * include/std/memory (__cpp_lib_parallel_algorithm): Likewise.
 723         * include/std/numeric (__cpp_lib_parallel_algorithm): Likewise.
 724         * testsuite/25_algorithms/pstl/feature_test.cc: New test.
 725
 726         * include/std/variant (get<T>, get<N>, get_if<N>, get_if<T>)
 727         (variant::emplace): Change static_assert messages from "should be"
 728         to "must be".
 729         (hash<monostate>::operator()): Remove name of unused parameter.
 730
 731         * include/std/mutex (scoped_lock::~scoped_lock()): Use fold
 732         expression.
 733
 734         * include/Makefile.am: Add new <bits/charconv.h> header.
 735         * include/Makefile.in: Regenerate.
 736         * include/bits/basic_string.h (to_string(int), to_string(unsigned))
 737         (to_string(long), to_string(unsigned long), to_string(long long))
 738         (to_string(unsigned long long)): Rewrite to use __to_chars_10_impl.
 739         * include/bits/charconv.h: New header.
 740         (__detail::__to_chars_len): Move here from <charconv>.
 741         (__detail::__to_chars_10_impl): New function extracted from
 742         __detail::__to_chars_10.
 743         * include/std/charconv (__cpp_lib_to_chars): Add, but comment out.
 744         (__to_chars_unsigned_type): New class template that reuses
 745         __make_unsigned_selector_base::__select to pick a type.
 746         (__unsigned_least_t): Redefine as __to_chars_unsigned_type<T>::type.
 747         (__detail::__to_chars_len): Move to new header.
 748         (__detail::__to_chars_10): Add inline specifier. Move code doing the
 749         output to __detail::__to_chars_10_impl and call that.
 750         * include/std/version (__cpp_lib_to_chars): Add, but comment out.
 751         * testsuite/21_strings/basic_string/numeric_conversions/char/
 752         to_string.cc: Fix reference in comment. Remove unused variable.
 753         * testsuite/21_strings/basic_string/numeric_conversions/char/
 754         to_string_int.cc: New test.
 755
 756 2019-06-09  Edward Smith-Rowland  <3dw4rd@verizon.net>
 757
 758         Fix ConstexprIterator requirements tests - No constexpr algorithms!
 759         * testsuite/21_strings/basic_string_view/requirements/constexpr_iter.cc:
 760         Replace copy with hand-rolled loop.
 761         * testsuite/23_containers/array/requirements/constexpr_iter.cc:
 762         Ditto.
 763
 764 2019-06-08  Edward Smith-Rowland  <3dw4rd@verizon.net>
 765
 766         Test for C++20 p0858 - ConstexprIterator requirements.
 767         * testsuite/21_strings/basic_string_view/requirements/constexpr_iter.cc:
 768         New test.
 769         * testsuite/23_containers/array/requirements/constexpr_iter.cc:
 770         New test.
 771
 772 2019-06-07  Thomas Rodgers  <trodgers@redhat.com>
 773
 774         Rename PSTL macro's consistent with libstdc++ (and llvm upstream
 775         project) standards.
 776         * include/bits/c++config: Rename all macros of the form __PSTL* to
 777         _PSTL*.
 778         * include/std/algorithm: Likewise.
 779         * include/std/execution: Likewise.
 780         * include/std/numeric: Likewise.
 781         * include/std/memory: Likewise.
 782         * include/pstl/glue_memory_impl.h: Likewise.
 783         * include/pstl/numeric_impl.h: Likewise.
 784         * include/pstl/glue_memory_defs.h: Likewise.
 785         * include/pstl/execution_defs.h: Likewise.
 786         * include/pstl/utils.h: Likewise.
 787         * include/pstl/algorithm_fwd.h: Likewise.
 788         * include/pstl/unseq_backend_simd.h: Likewise.
 789         * include/pstl/glue_execution_defs.h: Likewise.
 790         * include/pstl/algorithm_impl.h: Likewise.
 791         * include/pstl/parallel_impl.h: Likewise.
 792         * include/pstl/memory_impl.h: Likewise.
 793         * include/pstl/glue_numeric_defs.h: Likewise.
 794         * include/pstl/parallel_backend_utils.h: Likewise.
 795         * include/pstl/glue_algorithm_defs.h: Likewise.
 796         * include/pstl/parallel_backend.h: Likewise.
 797         * include/pstl/glue_numeric_impl.h: Likewise.
 798         * include/pstl/parallel_backend_tbb.h: Likewise.
 799         * include/pstl/numeric_fwd.h: Likewise.
 800         * include/pstl/glue_algorithm_impl.h: Likewise.
 801         * include/pstl/execution_impl.h: Likewise.
 802         * include/pstl/pstl_config.h: Likewise.
 803         * testsuite/util/pstl/pstl_test_config.h: Likewise.
 804         * testsuite/util/pstl/test_utils.h: Likewise.
 805         * testsuite/20_util/specialized_algorithms/pstl/uninitialized_construct.cc:
 806         Likewise.
 807         * testsuite/20_util/specialized_algorithms/pstl/uninitialized_copy_move.cc:
 808         Likewise.
 809         * testsuite/26_numerics/pstl/numeric_ops/adjacent_difference.cc:
 810         Likewise.
 811         * testsuite/26_numerics/pstl/numeric_ops/scan.cc: Likewise.
 812         * testsuite/26_numerics/pstl/numeric_ops/transform_scan.cc: Likewise.
 813         * testsuite/26_numerics/pstl/numeric_ops/reduce.cc: Likewise.
 814         * testsuite/25_algorithms/pstl/alg_nonmodifying/reverse.cc: Likewise.
 815         * testsuite/25_algorithms/pstl/alg_nonmodifying/nth_element.cc:
 816         Likewise.
 817         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_end.cc: Likewise.
 818         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_if.cc: Likewise.
 819         * testsuite/25_algorithms/pstl/alg_nonmodifying/none_of.cc: Likewise.
 820         * testsuite/25_algorithms/pstl/alg_nonmodifying/count.cc: Likewise.
 821         * testsuite/25_algorithms/pstl/alg_nonmodifying/reverse_copy.cc:
 822         Likewise.
 823         * testsuite/25_algorithms/pstl/alg_nonmodifying/equal.cc: Likewise.
 824         * testsuite/25_algorithms/pstl/alg_nonmodifying/search_n.cc: Likewise.
 825         * testsuite/25_algorithms/pstl/alg_nonmodifying/find.cc: Likewise.
 826         * testsuite/25_algorithms/pstl/alg_nonmodifying/all_of.cc: Likewise.
 827         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_first_of.cc:
 828         Likewise.
 829         * testsuite/25_algorithms/pstl/alg_sorting/is_heap.cc: Likewise.
 830         * testsuite/25_algorithms/pstl/alg_sorting/partial_sort.cc: Likewise.
 831         * testsuite/25_algorithms/pstl/alg_sorting/partial_sort_copy.cc:
 832         Likewise.
 833         * testsuite/25_algorithms/pstl/alg_sorting/lexicographical_compare.cc:
 834         Likewise.
 835         * testsuite/25_algorithms/pstl/alg_merge/inplace_merge.cc: Likewise.
 836         * testsuite/25_algorithms/pstl/alg_merge/merge.cc: Likewise.
 837         * testsuite/25_algorithms/pstl/alg_modifying_operations/unique_copy_equal.cc:
 838         Likewise.
 839         * testsuite/25_algorithms/pstl/alg_modifying_operations/replace_copy.cc:
 840         Likewise.
 841         * testsuite/25_algorithms/pstl/alg_modifying_operations/is_partitioned.cc:
 842         Likewise.
 843         * testsuite/25_algorithms/pstl/alg_modifying_operations/rotate_copy.cc:
 844         Likewise.
 845         * testsuite/25_algorithms/pstl/alg_modifying_operations/remove.cc:
 846         Likewise.
 847         * testsuite/25_algorithms/pstl/alg_modifying_operations/copy_if.cc:
 848         Likewise.
 849         * testsuite/25_algorithms/pstl/alg_modifying_operations/partition_copy.cc:
 850         Likewise.
 851         * testsuite/25_algorithms/pstl/alg_modifying_operations/partition.cc:
 852         Likewise.
 853         * testsuite/25_algorithms/pstl/alg_modifying_operations/copy_move.cc:
 854         Likewise.
 855         * testsuite/25_algorithms/pstl/alg_modifying_operations/unique.cc:
 856         Likewise.
 857         * testsuite/25_algorithms/pstl/alg_modifying_operations/rotate.cc:
 858         Likewise.
 859         * testsuite/25_algorithms/pstl/alg_nonmodifying/any_of.cc: Likewise.
 860
 861         Rename header guards to be consistent with upstream project's
 862         conventions.
 863         * include/pstl/glue_memory_impl.h: Rename all macros of the form
 864         _PSTL_(.*)_H to _PSTL_\U\1_H.
 865         * include/pstl/numeric_impl.h: Likewise.
 866         * include/pstl/glue_memory_defs.h: Likewise.
 867         * include/pstl/execution_defs.h: Likewise.
 868         * include/pstl/utils.h: Likewise.
 869         * include/pstl/algorithm_fwd.h: Likewise.
 870         * include/pstl/unseq_backend_simd.h: Likewise.
 871         * include/pstl/glue_execution_defs.h: Likewise.
 872         * include/pstl/algorithm_impl.h: Likewise.
 873         * include/pstl/parallel_impl.h: Likewise.
 874         * include/pstl/memory_impl.h: Likewise.
 875         * include/pstl/glue_numeric_defs.h: Likewise.
 876         * include/pstl/parallel_backend_utils.h: Likewise.
 877         * include/pstl/glue_algorithm_defs.h: Likewise.
 878         * include/pstl/parallel_backend.h: Likewise.
 879         * include/pstl/glue_numeric_impl.h: Likewise.
 880         * include/pstl/parallel_backend_tbb.h: Likewise.
 881         * include/pstl/numeric_fwd.h: Likewise.
 882         * include/pstl/glue_algorithm_impl.h: Likewise.
 883         * include/pstl/execution_impl.h: Likewise.
 884         * include/pstl/pstl_config.h: Likewise.
 885         * testsuite/util/pstl/pstl_test_config.h: Likewise.
 886
 887         Synchronize libstdc++ parallel algorithms with upstream
 888         project.
 889         * include/pstl/algorithm_fwd.h: Synchronize with
 890         upstream PSTL project.
 891         * include/pstl/algorithm_impl.h: Likewise.
 892         * include/pstl/execution_defs.h: Likewise.
 893         * include/pstl/execution_impl.h: Likewise.
 894         * include/pstl/glue_algorithm_impl.h: Likewise.
 895         * include/pstl/glue_execution_defs.h: Likewise.
 896         * include/pstl/numeric_fwd.h: Likewise.
 897         * include/pstl/numeric_impl.h: Likewise.
 898         * include/pstl/parallel_backend.h: Likewise.
 899         * include/pstl/pstl_config.h: Likewise.
 900         * include/pstl/unseq_backend_simd.h: Likewise.
 901         * include/pstl/parallel_backend_serial.h: New file.
 902         * include/Makefile.am (pstl_headers): Add
 903         parallel_backend_serial.h.
 904         * include/Makefile.in: Regenerate.
 905
 906         Clean up non-conforming names
 907         * include/pstl/algorithm_impl.h (__parallel_set_union_op):
 908         Uglfiy copy_range1 and copy_range2
 909         (__pattern_walk2_n): Rename local n to __n
 910         * include/pstl/parallel_backend_tbb.h (struct __binary_no_op):
 911         Rename parameter _T to _Tp.
 912
 913         Integrate non-TBB serial backend support
 914         * include/bits/c++config: Adjust TBB detection logic to select serial
 915         PSTL backend if no TBB present.
 916         * testsuite/utils/pstl/test_utils.h: Remove check for
 917         _PSTL_USE_PAR_POLICIES
 918
 919 2019-06-07  Jonathan Wakely  <jwakely@redhat.com>
 920
 921         * testsuite/24_iterators/container_access.cc: Move dg-options before
 922         dg-do directive so the target check uses the -std option.
 923
 924         PR libstdc++/90770
 925         * configure: Regenerate.
 926         * src/Makefile.am (stamp-debug): Also test for missing makefile.
 927         * src/Makefile.in: Regenerate.
 928
 929 2019-06-06  Jonathan Wakely  <jwakely@redhat.com>
 930
 931         * include/std/array: Do not include <stdexcept>.
 932         * include/std/optional: Include <exception> and
 933         <bits/exception_defines.h> instead of <stdexcept>.
 934         * testsuite/20_util/function_objects/searchers.cc: Include <cctype>
 935         for std::isalnum.
 936         * testsuite/20_util/tuple/cons/deduction.cc: Include <memory> for
 937         std::allocator.
 938         * testsuite/23_containers/map/erasure.cc: Include <string>.
 939         * testsuite/23_containers/unordered_map/erasure.cc: Likewise.
 940
 941         * testsuite/23_containers/deque/requirements/dr438/assign_neg.cc: Add
 942         dg-prune-output for different C++98 diagnostic.
 943         * testsuite/23_containers/deque/requirements/dr438/constructor_1_neg.cc:
 944         Likewise.
 945         * testsuite/23_containers/deque/requirements/dr438/constructor_2_neg.cc:
 946         Likewise.
 947         * testsuite/23_containers/deque/requirements/dr438/insert_neg.cc:
 948         Likewise.
 949         * testsuite/23_containers/list/requirements/dr438/assign_neg.cc:
 950         Likewise.
 951         * testsuite/23_containers/list/requirements/dr438/constructor_1_neg.cc:
 952         Likewise.
 953         * testsuite/23_containers/list/requirements/dr438/constructor_2_neg.cc:
 954         Likewise.
 955         * testsuite/23_containers/list/requirements/dr438/insert_neg.cc:
 956         Likewise.
 957         * testsuite/23_containers/vector/requirements/dr438/assign_neg.cc:
 958         Likewise.
 959         * testsuite/23_containers/vector/requirements/dr438/
 960         constructor_1_neg.cc: Likewise.
 961         * testsuite/23_containers/vector/requirements/dr438/
 962         constructor_2_neg.cc: Likewise.
 963         * testsuite/23_containers/vector/requirements/dr438/insert_neg.cc:
 964         Likewise.
 965         * testsuite/libstdc++-prettyprinters/compat.cc: Do not run for C++98.
 966
 967         * testsuite/23_containers/unordered_map/requirements/debug_container.cc:
 968         Do not test allocator rebinding extension for C++2a.
 969         * testsuite/23_containers/unordered_set/allocator/ext_ptr.cc: Change
 970         dg-do directive for C++17 and C++2a.
 971
 972         * testsuite/23_containers/deque/requirements/explicit_instantiation/
 973         1_c++0x.cc: Remove redundant test.
 974         * testsuite/23_containers/deque/requirements/explicit_instantiation/
 975         2.cc: Use target selector instead of preprocessor condition.
 976         * testsuite/23_containers/deque/requirements/explicit_instantiation/
 977         3.cc: Do not run test for C++2a.
 978         * testsuite/23_containers/forward_list/requirements/
 979         explicit_instantiation/3.cc: Likewise.
 980         * testsuite/23_containers/forward_list/requirements/
 981         explicit_instantiation/5.cc: Do not test allocator rebinding extension
 982         for C++2a.
 983         * testsuite/23_containers/list/requirements/explicit_instantiation/
 984         1_c++0x.cc: Remove redundant test.
 985         * testsuite/23_containers/list/requirements/explicit_instantiation/
 986         2.cc: Use target selector instead of preprocessor condition.
 987         * testsuite/23_containers/list/requirements/explicit_instantiation/
 988         3.cc: Do not run test for C++2a.
 989         * testsuite/23_containers/list/requirements/explicit_instantiation/
 990         5.cc: Do not test allocator rebinding extension for C++2a.
 991         * testsuite/23_containers/map/requirements/explicit_instantiation/
 992         1_c++0x.cc: Remove redundant test.
 993         * testsuite/23_containers/map/requirements/explicit_instantiation/
 994         2.cc: Adjust comment.
 995         * testsuite/23_containers/map/requirements/explicit_instantiation/
 996         3.cc: Do not run test for C++2a.
 997         * testsuite/23_containers/map/requirements/explicit_instantiation/
 998         5.cc: Do not test allocator rebinding extension for C++2a.
 999         * testsuite/23_containers/multimap/requirements/explicit_instantiation/
1000         1_c++0x.cc: Remove redundant test.
1001         * testsuite/23_containers/multimap/requirements/explicit_instantiation/
1002         3.cc: Do not run test for C++2a.
1003         * testsuite/23_containers/multimap/requirements/explicit_instantiation/
1004         5.cc: Do not test allocator rebinding extension for C++2a.
1005         * testsuite/23_containers/multiset/requirements/explicit_instantiation/
1006         3.cc: Do not run test for C++2a.
1007         * testsuite/23_containers/multiset/requirements/explicit_instantiation/
1008         5.cc: Do not test allocator rebinding extension for C++2a.
1009         * testsuite/23_containers/set/requirements/explicit_instantiation/3.cc:
1010         Do not run test for C++2a.
1011         * testsuite/23_containers/set/requirements/explicit_instantiation/
1012         1_c++0x.cc: Remove redundant test.
1013         * testsuite/23_containers/set/requirements/explicit_instantiation/5.cc:
1014         Do not test allocator rebinding extension for C++2a.
1015         * testsuite/23_containers/unordered_map/requirements/
1016         explicit_instantiation/3.cc: Likewise.
1017         * testsuite/23_containers/unordered_map/requirements/
1018         explicit_instantiation/5.cc: Do not test allocator rebinding extension
1019         for C++2a.
1020         * testsuite/23_containers/unordered_multimap/requirements/
1021         explicit_instantiation/3.cc: Do not run test for C++2a.
1022         * testsuite/23_containers/unordered_multimap/requirements/
1023         explicit_instantiation/5.cc: Do not test allocator rebinding extension
1024         for C++2a.
1025         * testsuite/23_containers/unordered_multiset/requirements/
1026         explicit_instantiation/3.cc: Do not run test for C++2a.
1027         * testsuite/23_containers/unordered_multiset/requirements/
1028         explicit_instantiation/5.cc: Do not test allocator rebinding extension
1029         for C++2a.
1030         * testsuite/23_containers/unordered_set/requirements/
1031         explicit_instantiation/3.cc: Do not run test for C++2a.
1032         * testsuite/23_containers/unordered_set/requirements/
1033         explicit_instantiation/5.cc: Do not test allocator rebinding extension
1034         for C++2a.
1035         * testsuite/23_containers/vector/ext_pointer/explicit_instantiation/
1036         2.cc: Remove redundant test.
1037         * testsuite/23_containers/vector/ext_pointer/explicit_instantiation/
1038         3.cc: Do not run test for C++2a.
1039         * testsuite/23_containers/vector/requirements/explicit_instantiation/
1040         3.cc: Likewise.
1041
1042         * include/std/type_traits (is_empty, is_polymorphic, is_final)
1043         (is_abstract, is_aggregate): Remove static_assert.
1044         * testsuite/20_util/is_abstract/incomplete_neg.cc: Check for error
1045         from builtin only.
1046         * testsuite/20_util/is_aggregate/incomplete_neg.cc: Likewise. Add
1047         missing -std=gnu++17 option.
1048         * testsuite/20_util/is_empty/incomplete_neg.cc: New test.
1049         * testsuite/20_util/is_final/incomplete_neg.cc: New test.
1050         * testsuite/20_util/is_polymorphic/incomplete_neg.cc: Check for error
1051         from builtin only.
1052
1053         * testsuite/18_support/set_terminate.cc: Do not run for C++98 mode.
1054         * testsuite/18_support/set_unexpected.cc: Likewise.
1055         * testsuite/20_util/is_nothrow_invocable/value.cc: Test converting to
1056         void.
1057         * testsuite/20_util/is_nothrow_invocable/value_ext.cc: Fix constexpr
1058         function to be valid in C++11.
1059         * testsuite/26_numerics/complex/proj.cc: Do not run for C++98 mode.
1060         * testsuite/experimental/names.cc: Do not run for C++98 mode. Do not
1061         include Library Fundamentals or Networking headers in C++11 mode.
1062         * testsuite/ext/char8_t/atomic-1.cc: Do not run for C++98 mode.
1063
1064         * include/std/tuple (_TC): Replace with _TupleConstraints.
1065         (_TupleConstraints): New helper for SFINAE constraints, with more
1066         expressive member functions to reduce duplication when used.
1067         (tuple::_TC2, tuple::_TMC, tuple::_TNTC): Remove.
1068         (tuple::_TCC): Replace dummy type parameter with bool non-type
1069         parameter that can be used to check the pack size.
1070         (tuple::_ImplicitDefaultCtor, tuple::_ExplicitDefaultCtor)
1071         (tuple::_ImplicitCtor, tuple::_ExplicitCtor): New alias templates for
1072         checking constraints in constructors.
1073         (tuple::__valid_args, tuple::_UseOtherCtor, tuple::__use_other_ctor):
1074         New SFINAE helpers.
1075         (tuple::tuple): Use new helpers to reduce repitition in constraints.
1076         (tuple::tuple(allocator_arg_t, const Alloc&)): Constrain.
1077         (tuple<T1, T2>::_TCC, tuple<T1, T2>::_ImplicitDefaultCtor)
1078         (tuple<T1, T2>::_ExplicitDefaultCtor, tuple<T1, T2>::_ImplicitCtor)
1079         (tuple<T1, T2>::_ExplicitCtor): New alias templates for checking
1080         constraints in constructors.
1081         (tuple::__is_alloc_arg()): New SFINAE helpers.
1082         (tuple<T1, T2>::tuple): Use new helpers to reduce repitition in
1083         constraints.
1084         (tuple<T1, T2>::tuple(allocator_arg_t, const Alloc&)): Constrain.
1085         * testsuite/20_util/tuple/cons/90700.cc: New test.
1086         * testsuite/20_util/tuple/cons/allocators.cc: Add default constructor
1087         to meet new constraint on allocator-extended default constructor.
1088
1089 2019-06-03  Jonathan Wakely  <jwakely@redhat.com>
1090
1091         * include/bits/stl_map.h (map): Disable static assert for C++98 mode.
1092         * include/bits/stl_multimap.h (multimap): Likewise.
1093
1094 2019-06-03  François Dumont  <fdumont@gcc.gnu.org>
1095
1096         Rename variables and cleanup comments.
1097         * include/bits/hashtable_policy.h
1098         * include/bits/hashtable.h
1099
1100 2019-06-03  Jonathan Wakely  <jwakely@redhat.com>
1101
1102         * doc/xml/manual/status_cxx2020.xml: Add missing row for P0920R2.
1103         Fix bgcolor for P0340R3.
1104         * doc/html/*: Regenerate.
1105
1106         PR libstdc++/90686
1107         * doc/xml/manual/status_cxx2014.xml: Document what's missing from
1108         <experimental/memory_resource>.
1109         * doc/xml/manual/status_cxx2020.xml: Document status of P1285R0,
1110         P0339R6, P0340R3, P1164R1 and P1357R1.
1111         * doc/html/*: Regenerate.
1112
1113         * doc/xml/manual/status_cxx2020.xml: Document P1463R1 status.
1114         * include/bits/forward_list.h [__cplusplus > 201703]: Enable
1115         allocator::value_type assertion for C++2a.
1116         * include/bits/hashtable.h: Likewise.
1117         * include/bits/stl_deque.h: Likewise.
1118         * include/bits/stl_list.h: Likewise.
1119         * include/bits/stl_map.h: Likewise.
1120         * include/bits/stl_multimap.h: Likewise.
1121         * include/bits/stl_multiset.h: Likewise.
1122         * include/bits/stl_set.h: Likewise.
1123         * include/bits/stl_vector.h: Likewise.
1124         * testsuite/23_containers/deque/48101-3_neg.cc: New test.
1125         * testsuite/23_containers/forward_list/48101-3_neg.cc: New test.
1126         * testsuite/23_containers/list/48101-3_neg.cc: New test.
1127         * testsuite/23_containers/map/48101-3_neg.cc: New test.
1128         * testsuite/23_containers/multimap/48101-3_neg.cc: New test.
1129         * testsuite/23_containers/multiset/48101-3_neg.cc: New test.
1130         * testsuite/23_containers/set/48101-3_neg.cc: New test.
1131         * testsuite/23_containers/unordered_map/48101-3_neg.cc: New test.
1132         * testsuite/23_containers/unordered_multimap/48101-3_neg.cc: New test.
1133         * testsuite/23_containers/unordered_multiset/48101-3_neg.cc: New test.
1134         * testsuite/23_containers/unordered_set/48101-3_neg.cc: New test.
1135         * testsuite/23_containers/vector/48101-3_neg.cc: New test.
1136
1137 2019-05-31  Gerald Pfeifer  <gerald@pfeifer.com>
1138
1139         * doc/xml/manual/allocator.xml: Move hoard.org back to http.
1140
1141 2019-05-31  Jonathan Wakely  <jwakely@redhat.com>
1142
1143         * include/std/tuple (tuple<>): Add noexcept to allocator-extended
1144         constructors.
1145         (tuple<T1, T2>::__nothrow_default_constructible()): New helper
1146         function.
1147         (tuple<T1, T2>::tuple(), explicit tuple<T1, T2>::tuple()): Use helper.
1148
1149 2019-05-31  Jonathan Wakely  <jwakely@redhat.com>
1150
1151         * src/c++98/bitmap_allocator.cc: Add using-declaration for size_t.
1152
1153         PR libstdc++/90682
1154         * libsupc++/eh_term_handler.cc: Include eh_term_handler.h to get
1155         definition of _GLIBCXX_DEFAULT_TERM_HANDLER.
1156         * libsupc++/eh_term_handler.h: New header defining
1157         _GLIBCXX_DEFAULT_TERM_HANDLER.
1158         * libsupc++/eh_terminate.cc: Include eh_term_handler.h.
1159         (set_terminate): Restore default handler when argument is null.
1160         (set_unexpected): Likewise.
1161         * testsuite/18_support/set_terminate.cc: New test.
1162         * testsuite/18_support/set_unexpected.cc: New test.
1163
1164         * include/backward/hashtable.h (size_t, ptrdiff_t)
1165         (forward_iterator_tag, input_iterator_tag, _Construct, _Destroy)
1166         (distance, vector, pair, __iterator_category): Remove
1167         using-declarations that add these names to namespace __gnu_cxx.
1168         * include/ext/bitmap_allocator.h (size_t, ptrdiff_t): Likewise.
1169         * include/ext/debug_allocator.h (size_t): Likewise.
1170         * include/ext/functional (size_t, unary_function, binary_function)
1171         (mem_fun1_t, const_mem_fun1_t, mem_fun1_ref_t, const_mem_fun1_ref_t):
1172         Likewise.
1173         * include/ext/malloc_allocator.h (size_t, ptrdiff_t): Likewise.
1174         * include/ext/memory (ptrdiff_t, pair, __iterator_category): Likewise.
1175         * include/ext/mt_allocator.h (size_t, ptrdiff_t): Likewise.
1176         * include/ext/new_allocator.h (size_t, ptrdiff_t): Likewise.
1177         * include/ext/numeric (iota): Fix outdated comment.
1178         * include/ext/pool_allocator.h (size_t, ptrdiff_t): Likewise.
1179         * include/ext/rb_tree (_Rb_tree, allocator): Likewise.
1180         * include/ext/rope (size_t, ptrdiff_t, allocator, _Destroy): Likewise.
1181         * include/ext/ropeimpl.h (size_t, printf, basic_ostream)
1182         (__throw_length_error, _Destroy, std::__uninitialized_fill_n_a):
1183         Likewise.
1184         * include/ext/slist (size_t, ptrdiff_t, _Construct, _Destroy)
1185         (allocator, __true_type, __false_type): Likewise.
1186
1187 2019-05-31  Antony Polukhin  <antoshkka@gmail.com>
1188
1189         PR libstdc++/71579
1190         * include/std/type_traits __type_identity, __is_complete_or_unbounded):
1191         New helpers for checking preconditions in traits.
1192         (is_trivial, is_trivially_copyable, is_standard_layout, is_pod)
1193         (is_literal_type, is_empty, is_polymorphic, is_final, is_abstract)
1194         (is_destructible, is_nothrow_destructible, is_constructible)
1195         (is_default_constructible, is_copy_constructible)
1196         (is_move_constructible, is_nothrow_default_constructible)
1197         (is_nothrow_constructible, is_nothrow_copy_constructible)
1198         (is_nothrow_move_constructible, is_copy_assignable, is_move_assignable)
1199         (is_nothrow_assignable, is_nothrow_copy_assignable)
1200         (is_nothrow_move_assignable, is_trivially_constructible)
1201         (is_trivially_copy_constructible, is_trivially_move_constructible)
1202         is_trivially_assignable, is_trivially_copy_assignable)
1203         (is_trivially_move_assignable, is_trivially_destructible)
1204         (alignment_of, is_swappable, is_nothrow_swappable, is_invocable)
1205         (is_invocable_r, is_nothrow_invocable)
1206         (has_unique_object_representations, is_aggregate): Add static_asserts
1207         to make sure that type traits are not misused with incomplete types.
1208         (__is_constructible_impl, __is_nothrow_default_constructible_impl)
1209         (__is_nothrow_constructible_impl, __is_nothrow_assignable_impl): New
1210         base characteristics without assertions that can be reused in other
1211         traits.
1212         * testsuite/20_util/is_complete_or_unbounded/memoization.cc: New test.
1213         * testsuite/20_util/is_complete_or_unbounded/memoization_neg.cc: New
1214         test.
1215         * testsuite/20_util/is_complete_or_unbounded/value.cc: New test.
1216         * testsuite/20_util/is_abstract/incomplete_neg.cc: New test.
1217         * testsuite/20_util/is_aggregate/incomplete_neg.cc: New test.
1218         * testsuite/20_util/is_class/value.cc: Check incomplete type.
1219         * testsuite/20_util/is_function/value.cc: Likewise.
1220         * testsuite/20_util/is_move_constructible/incomplete_neg.cc: New test.
1221         * testsuite/20_util/is_nothrow_move_assignable/incomplete_neg.cc: New
1222         test.
1223         * testsuite/20_util/is_polymorphic/incomplete_neg.cc: New test.
1224         * testsuite/20_util/is_reference/value.cc: Check incomplete types.
1225         * testsuite/20_util/is_unbounded_array/value.cc: Likewise.
1226         * testsuite/20_util/is_union/value.cc: Likewise.
1227         * testsuite/20_util/is_void/value.cc: Likewise.
1228         * testsuite/util/testsuite_tr1.h: Add incomplete union type.
1229
1230 2019-05-31  Jonathan Wakely  <jwakely@redhat.com>
1231
1232         * include/bits/random.h (random_device::_M_init(const char*, size_t)):
1233         Add new private member function.
1234         * src/c++11/cow-string-inst.cc (random_device::_M_init(const string&))
1235         (random_device::_M_init_pretr1(const string&)): Call new private
1236         member with string data.
1237         * src/c++11/random.cc (random_device::_M_init(const char*, size_t)):
1238         Define.
1239         * testsuite/26_numerics/random/random_device/cons/default-cow.cc: New
1240         test using COW strings.
1241         * testsuite/26_numerics/random/random_device/cons/default.cc: Generate
1242         a value from the device.
1243         * testsuite/26_numerics/random/random_device/cons/token.cc: Likewise.
1244         Fix typo in token string.
1245
1246 2019-05-30  Nina Dinka Ranns  <dinka.ranns@gmail.com>
1247
1248         LWG2788 basic_string spurious use of a default constructible allocator
1249         * include/bits/basic_string.tcc [_GLIBCXX_USE_CXX11_ABI]
1250         (basic_string::_M_replace_dispatch): Construct temporary string with
1251         the current allocator.
1252         * testsuite/21_strings/basic_string/allocator/char/lwg2788.cc: New.
1253         * testsuite/21_strings/basic_string/allocator/wchar_t/lwg2788.cc: New.
1254
1255 2019-05-30  Jonathan Wakely  <jwakely@redhat.com>
1256
1257         * doc/xml/manual/diagnostics.xml: Update list of headers that define
1258         exception classes.
1259         * doc/xml/manual/support.xml: Rewrite advice around NULL. Rewrite
1260         section about new/delete overloads. Improve section on verbose
1261         terminate handler.
1262         * doc/html/*: Regenerate.
1263
1264         * doc/xml/manual/status_cxx2020.xml: Add feature-test macro for
1265         P0811R3. Change status of P1353R0.
1266         * doc/html/*: Regenerate.
1267
1268         * doc/xml/manual/status_cxx2011.xml: Use <variablelist> for
1269         documentation of implementation-defined types for [thread.req.native].
1270         * doc/xml/manual/status_cxx2017.xml: Update documentation of
1271         implementation-defined strings for [variant.bad.access]. Fix typo in
1272         documentation of implementation-defined support for [fs.conform.9945].
1273         * doc/html/*: Regenerate.
1274
1275 2019-05-29  Jonathan Wakely  <jwakely@redhat.com>
1276
1277         PR libstdc++/85494
1278         * testsuite/26_numerics/random/random_device/cons/token.cc: Fix test
1279         that fails on mingw-w64.
1280
1281         PR libstdc++/88881
1282         * src/c++17/fs_ops.cc [_GLIBCXX_FILESYSTEM_IS_WINDOWS]
1283         (status(const path&, error_code&)): Use parent_path() to remove
1284         trailing slash.
1285         (symlink_status(const path&, error_code&)): Duplicate workaround for
1286         bug in _wstat for paths with trailing slash.
1287         * testsuite/27_io/filesystem/operations/remove_all.cc: Check path
1288         with trailing slash.
1289         * testsuite/27_io/filesystem/operations/status.cc: Likewise.
1290         * testsuite/27_io/filesystem/operations/symlink_status.cc: Likewise.
1291
1292         * src/c++17/fs_path.cc (path::parent_path()): Create whole path at
1293         once instead of building it iteratively.
1294
1295         * testsuite/util/testsuite_api.h: Remove names of unused parameters.
1296
1297         PR libstdc++/85494 use rdseed and rand_s in std::random_device
1298         * acinclude.m4 (GLIBCXX_CHECK_X86_RDSEED): Define macro to check if
1299         the assembler supports rdseed.
1300         * config.h.in: Regenerate.
1301         * configure: Regenerate.
1302         * configure.ac: Use GLIBCXX_CHECK_X86_RDSEED.
1303         * config/os/mingw32-w64/os_defines.h (_GLIBCXX_USE_CRT_RAND_S): Define.
1304         * doc/html/*: Regenerate.
1305         * doc/xml/manual/status_cxx2011.xml: Document new tokens.
1306         * include/bits/random.h (random_device::random_device()): Always call
1307         _M_init rather than _M_init_pretr1.
1308         (random_device::random_device(const string&)): Likewise.
1309         (random_device::operator()()): Always call _M_getval().
1310         (random_device::_M_file): Replace first member of union with an
1311         anonymous struct, with _M_file as its first member.
1312         * src/c++11/random.cc [_GLIBCXX_X86_RDRAND] (USE_RDRAND): Define.
1313         [_GLIBCXX_X86_RDSEED] (USE_RDSEED): Define.
1314         (USE_MT19937): Define if none of the above are defined.
1315         (USE_POSIX_FILE_IO): Define.
1316         (_M_strtoul): Remove.
1317         [USE_RDSEED] (__x86_rdseed): Define new function.
1318         [_GLIBCXX_USE_CRT_RAND_S] (__winxp_rand_s): Define new function.
1319         (random_device::_M_init(const string&)): Initialize new union members.
1320         Add support for "rdseed" and "rand_s" tokens. Decide what the
1321         "default" token does according to which USE_* macros are defined.
1322         [USE_POSIX_FILE_IO]: Store a file descriptor.
1323         [USE_MT19937]: Forward to _M_init_pretr1 instead.
1324         (random_device::_M_init_pretr1(const string&)) [USE_MT19937]: Inline
1325         code from _M_strtoul.
1326         [!USE_MT19937]: Call _M_init, transforming the old default token or
1327         numeric tokens to "default".
1328         (random_device::_M_fini()) [USE_POSIX_FILE_IO]: Use close not fclose.
1329         (random_device::_M_getval()): Use new union members to obtain a
1330         random number from the stored function pointer or file descriptor.
1331         [USE_MT19937]: Obtain a value from the mt19937 engine.
1332         (random_device::_M_getval_pretr1()): Call _M_getval().
1333         (random_device::_M_getentropy()) [USE_POSIX_FILE_IO]: Use _M_fd
1334         instead of fileno.
1335         [!USE_MT19937] (mersenne_twister): Do not instantiate when not needed.
1336         * testsuite/26_numerics/random/random_device/85494.cc: New test.
1337
1338 2019-05-28  Jonathan Wakely  <jwakely@redhat.com>
1339
1340         PR libstdc++/90634
1341         * include/experimental/bits/fs_path.h (path::path(path&&)): Only call
1342         _M_split_cmpts() for a path with multiple components.
1343         (path::_S_is_dir_sep()): Add missing 'static' keyword to function.
1344         * src/filesystem/path.cc (path::_M_split_cmpts()): Count number of
1345         components and reserve space in vector. Return early when there is
1346         only one component.
1347         * testsuite/27_io/filesystem/path/construct/90634.cc: New test.
1348         * testsuite/experimental/filesystem/path/construct/90634.cc: New test.
1349
1350         * testsuite/util/testsuite_fs.h (compare_paths): Use three-argument
1351         form of std::equals for C++11 compatibility.
1352
1353 2019-05-26  Gerald Pfeifer  <gerald@pfeifer.com>
1354
1355         * doc/xml/manual/appendix_contributing.xml: Update pointer to
1356         C++ standard at ansi.org.
1357
1358 2019-05-24  Jonathan Wakely  <jwakely@redhat.com>
1359
1360         * include/std/numeric (midpoint(T*, T*)): Fix incorrect result.
1361         * testsuite/26_numerics/midpoint/pointer.cc: Change "compile" test
1362         to "run".
1363
1364         * testsuite/20_util/shared_ptr/cons/alias-rval.cc: Fix test.
1365         * testsuite/20_util/shared_ptr/cons/alias.cc: Remove unused function.
1366
1367 2019-05-23  Jonathan Wakely  <jwakely@redhat.com>
1368
1369         * testsuite/20_util/function_objects/invoke/1.cc: Move C++17-specific
1370         tests to ...
1371         * testsuite/20_util/function_objects/invoke/3.cc: New test.
1372         * testsuite/23_containers/unordered_set/allocator/ext_ptr.cc: Change
1373         "compile" test to "run".
1374
1375         * doc/xml/manual/intro.xml: Document LWG DR 2996 change.
1376         * doc/html/*: Regenerate.
1377         * include/bits/shared_ptr.h (shared_ptr(shared_ptr&&, T*)): Add
1378         rvalue aliasing constructor.
1379         (static_pointer_cast, const_pointer, dynamic_pointer_cast)
1380         (reinterpret_pointer_cast): Add overloads taking rvalues.
1381         * include/bits/shared_ptr_base.h (__shared_ptr(__shared_ptr&&, T*)):
1382         Add rvalue aliasing constructor.
1383         * testsuite/20_util/shared_ptr/casts/1.cc: Change "compile" test to
1384         "run" and check return values as well as types.
1385         * testsuite/20_util/shared_ptr/casts/reinterpret.cc: Likewise.
1386         * testsuite/20_util/shared_ptr/casts/rval.cc: New test.
1387         * testsuite/20_util/shared_ptr/cons/alias-rval.cc: New test.
1388         * testsuite/20_util/shared_ptr/cons/alias.cc: Remove unused return
1389         values.
1390
1391         * doc/xml/manual/evolution.xml: Document LWG DR 2921 change.
1392         * doc/xml/manual/intro.xml: Likewise.
1393         * include/std/future (__create_task_state): Add default arguments
1394         to make providing an allocator optional.
1395         (packaged_task::packaged_task(F&&)): Call __create_task_state directly
1396         instead of delegating to another constructor.
1397         (packaged_task::packaged_task(allocator_arg_t, const A&, ...)): Do not
1398         define allocator-extended constructors for C++17 and later.
1399         * testsuite/30_threads/packaged_task/cons/alloc.cc: Only run test for
1400         C++11 and C++14.
1401         * testsuite/30_threads/packaged_task/cons/alloc2.cc: Likewise.
1402         * testsuite/30_threads/packaged_task/cons/alloc_min.cc: Likewise.
1403         * testsuite/30_threads/packaged_task/uses_allocator.cc: Likewise.
1404
1405 2019-05-23  Hans-Peter Nilsson  <hp@axis.com>
1406
1407         * testsuite/26_numerics/random/poisson_distribution/operators/values.cc:
1408         Don't run the libstdc++/83237 part on simulator targets.
1409
1410 2019-05-23  Jonathan Wakely  <jwakely@redhat.com>
1411
1412         * doc/xml/manual/status_cxx2017.xml: Add feature test macro for
1413         P0040R3.
1414         * doc/html/*: Regenerate.
1415
1416         * include/experimental/any (__any_caster): Use RTTI if comparing
1417         addresses fails, to support non-unique addresses in shared libraries.
1418         * include/std/any (__any_caster): Likewise.
1419
1420         PR libstdc++/90220
1421         * include/experimental/any (__any_caster): Constrain to only be
1422         callable for object types. Use remove_cv_t instead of decay_t.
1423         If the type decays or isn't copy constructible, compare the manager
1424         function to a dummy specialization.
1425         (__any_caster): Add overload constrained for non-object types.
1426         (any::_Manager_internal<_Op>): Add dummy specialization.
1427         * testsuite/experimental/any/misc/any_cast.cc: Test function types
1428         and array types.
1429
1430 2019-05-22  Jonathan Wakely  <jwakely@redhat.com>
1431
1432         PR libstdc++/90557
1433         * src/c++17/fs_path.cc (path::_List::operator=(const _List&)): Fix
1434         reversed arguments to uninitialized_copy_n.
1435         * testsuite/27_io/filesystem/path/assign/copy.cc: Check that source
1436         is unchanged by copy assignment.
1437         * testsuite/util/testsuite_fs.h (compare_paths): Use std::equal to
1438         compare path components.
1439
1440         PR libstdc++/77691
1441         * include/experimental/memory_resource: Add system header pragma and
1442         do not define anything unless compiled as C++14 or later.
1443         (__resource_adaptor_common::__guaranteed_alignment): Remove.
1444         (__resource_adaptor_imp::do_allocate): If the requested alignment
1445         is a fundamental alignment then either allocate directly from _M_alloc
1446         or call the new _M_allocate function.
1447         (__resource_adaptor_imp::do_deallocate): Likewise for deallocation.
1448         (__resource_adaptor_imp::_M_allocate): New function that uses a copy
1449         of the allocator rebound to a POD type with the specified alignment.
1450         (__resource_adaptor_imp::_M_deallocate): Likewise for deallocation.
1451         * testsuite/experimental/memory_resource/new_delete_resource.cc:
1452         Adjust expected allocation sizes.
1453         * testsuite/experimental/memory_resource/resource_adaptor.cc: Remove
1454         xfail for Solaris x86.
1455
1456 2019-05-21  Thomas Rodgers  <trodgers@redhat.com>
1457
1458         LWG 3062 - Unnecessary decay_t in is_execution_policy_v
1459         * include/pstl/execution_defs.h (__enable_if_execution_policy):
1460         Use std::__remove_cvref_t when building with GCC.
1461
1462 2019-05-21  Jonathan Wakely  <jwakely@redhat.com>
1463
1464         PR libstdc++/90252
1465         * testsuite/lib/libstdc++.exp (check_effective_target_tbb-backend):
1466         Use "additional_flags" to pass -ltbb to v3_target_compile command.
1467         Use check_v3_target_prop_cached to cache the result of the test.
1468
1469         * doc/xml/manual/shared_ptr.xml: Fix names of lock policy constants.
1470
1471 2019-05-20  Thomas Rodgers  <trodgers@redhat.com>
1472
1473         PR libstdc++/90252
1474         * testsuite/lib/libstdc++.exp (check_effective_target_tbb-backend):
1475         Changed v3_target_compile check from preprocess to executable.
1476         Added "-ltbb" to v3_target_compile flags.
1477
1478 2019-05-20  Thomas Rodgers  <trodgers@redhat.com>
1479
1480         * testsuite/lib/libstdc++.exp (check_effective_target_tbb-backend):
1481         Add check for Thread Building Blocks 2018 or later.
1482
1483 2019-05-20  Jonathan Wakely  <jwakely@redhat.com>
1484
1485         * testsuite/experimental/names.cc: Only include Networking TS headers
1486         on targets with the necessary Gthreads support.
1487
1488 2019-05-20  Marek Polacek  <polacek@redhat.com>
1489
1490         CWG 2094 - volatile scalars are trivially copyable.
1491         PR c++/85679
1492         * testsuite/20_util/is_trivially_copyable/value.cc: Change the expected
1493         result for volatile int.
1494
1495 2019-05-20  Jonathan Wakely  <jwakely@redhat.com>
1496
1497         * testsuite/17_intro/names.cc: Do not check 'ptr' on Solaris.
1498         * testsuite/experimental/names.cc: Include <experimental/filesystem>
1499         conditionally.
1500
1501         PR c++/90532 Ensure __is_constructible(T[]) is false
1502         * include/std/type_traits (__do_is_default_constructible_impl)
1503         (__is_default_constructible_atom, __is_default_constructible_safe):
1504         Remove.
1505         (is_default_constructible): Use is_constructible.
1506         * testsuite/20_util/is_constructible/value.cc: Check int[] case.
1507         * testsuite/20_util/is_default_constructible/value.cc: Likewise.
1508         * testsuite/20_util/is_trivially_constructible/value.cc: Likewise.
1509         * testsuite/20_util/is_trivially_default_constructible/value.cc:
1510         Likewise.
1511
1512 2019-05-20  Pádraig Brady  <pbrady@fb.com>
1513
1514         * libstdc++-v3/include/ext/new_allocator.h (deallocate): Pass the size
1515         to the deallocator with -fsized-deallocation.
1516
1517 2019-05-20  Jonathan Wakely  <jwakely@redhat.com>
1518
1519         * testsuite/experimental/memory_resource/new_delete_resource.cc: Fix
1520         test by passing correct alignment to deallocate function.
1521
1522 2019-05-18  Jonathan Wakely  <jwakely@redhat.com>
1523
1524         PR libstdc++/90520
1525         * python/libstdcxx/v6/printers.py (UniquePointerPrinter.__init__):
1526         Raise exception if unique_ptr tuple member has unknown structure.
1527         * python/libstdcxx/v6/xmethods.py (UniquePtrGetWorker.__call__):
1528         Adjust worker to support new __uniq_ptr_data base class. Do not
1529         assume field called _M_head_impl is the first tuple element.
1530
1531 2019-05-17  François Dumont  <fdumont@gcc.gnu.org>
1532
1533         * include/bits/stl_deque.h
1534         (_Deque_iterator<>::__ptr_to): Remove, use std::__ptr_rebind.
1535         (_Deque_base(_Deque_base&&, const allocator_type&)): New.
1536         (_Deque_base::_Deque_impl_data): New.
1537         (_Deque_base::_Deque_impl): Inherit latter.
1538         (_Deque_base::_Deque_impl::_M_swap_data): Move...
1539         (_Deque_base::_Deque_impl_data::_M_swap_data): ... here.
1540         (_Deque_base::_Deque_impl()): Add noexcept qualification.
1541         (_Deque_base::_Deque_impl(_Deque_impl&&, _Tp_alloc_type&&)): New.
1542         (_Deque_base::_Deque_impl::_M_get_Tp_allocator()): Remove static_cast.
1543         (deque<>::deque()): Default.
1544         (deque<>::deque(deque&&)): Default.
1545         (deque<>::deque(deque&&, const allocator_type&, false_type)): New.
1546         (deque<>::deque(deque&&, const allocator_type&, true_type)): New.
1547         (deque<>::deque(deque&&, const allocator_type&)): Delegate to latters.
1548         (deque<>::deque<_It>(_It, _It, const allocator_type&)): Use
1549         _M_range_initialize.
1550         (deque<>::assign<_It>(_It, _It)): Use _M_assign_aux.
1551         (deque<>::resize(size_type, const value_type&)): Share a single
1552         implementation.
1553         (deque<>::insert<_It>(const_iterator, _It, _It)): Use
1554         _M_range_insert_aux.
1555         [__cplusplus >= 201103L](_M_initialize_dispatch): Remove.
1556         [__cplusplus >= 201103L](_M_assign_dispatch): Remove.
1557         [__cplusplus >= 201103L](_M_insert_dispatch): Remove.
1558         * testsuite/23_containers/deque/allocator/default_init.cc: New.
1559
1560 2019-05-17  Jonathan Wakely  <jwakely@redhat.com>
1561
1562         PR libstdc++/90246
1563         * include/std/variant (holds_alternative, get, get_if): Improve
1564         static assertion messages.
1565         (bad_variant_access::bad_variant_access()): Change default message.
1566         (__throw_bad_variant_access(bool)): New overload.
1567         (get): Use new overload.
1568         (visit, visit<R>): Improve exception message.
1569
1570         * testsuite/20_util/variant/compile.cc: Fix narrowing test for ILP32
1571         targets. Add more cases from P0608R3.
1572         * testsuite/20_util/variant/run.cc: Add more cases from P0608R3.
1573
1574         * include/bits/random.h (seed_seq::param): Fix non-reserved name.
1575         * include/experimental/type_traits (is_detected_exact)
1576         (is_detected_exact_v): Likewise.
1577         * include/pstl/execution_defs.h (is_execution_policy)
1578         (is_execution_policy_v, __enable_if_execution_policy): Likewise.
1579         * include/pstl/execution_impl.h (__policy_traits): Likewise.
1580         * testsuite/17_intro/names.cc: Check for more non-reserved names.
1581         * testsuite/experimental/names.cc: New test.
1582
1583         PR libstdc++/85965
1584         * include/bits/hashtable.h (_Hashtable::~_Hashtable()): Remove static
1585         assertions from the destructor.
1586         * include/bits/hashtable_policy.h (_Hash_code_base::_M_hash_code):
1587         Move static_assert for hash function to here.
1588         (_Hash_table_base::_M_equals): Move static_assert for equality
1589         predicate to here.
1590         * include/bits/stl_tree.h (_Rb_tree::_S_value(_Const_Link_type)):
1591         Remove.
1592         (_Rb_tree::_S_key(_Const_Link_type)): Move assertions here. Access
1593         the value directly instead of calling _S_value.
1594         (_Rb_tree::_S_value(_Const_Base_ptr)): Remove.
1595         (_Rb_tree::_S_key(_Const_Base_ptr)): Do downcast and forward to
1596         _S_key(_Const_Link_type).
1597         * testsuite/23_containers/set/85965.cc: Check construction,
1598         destruction, assignment and size() do not trigger the assertions.
1599         * testsuite/23_containers/unordered_set/85965.cc: Likewise.
1600         * testsuite/23_containers/map/48101_neg.cc: Call find and adjust
1601         expected errors.
1602         * testsuite/23_containers/multimap/48101_neg.cc: Likewise.
1603         * testsuite/23_containers/multiset/48101_neg.cc: Likewise.
1604         * testsuite/23_containers/set/48101_neg.cc: Likewise.
1605         * testsuite/23_containers/unordered_map/48101_neg.cc: Likewise.
1606         * testsuite/23_containers/unordered_multimap/48101_neg.cc: Likewise.
1607         * testsuite/23_containers/unordered_multiset/48101_neg.cc: Likewise.
1608         * testsuite/23_containers/unordered_set/48101_neg.cc: Likewise.
1609
1610         * include/bits/invoke.h [__cplusplus < 201703L] (__invoke_r<void>):
1611         Use _GLIBCXX14_CONSTEXPR because void functions cannot be constexpr
1612         in C++11.
1613
1614         * doc/xml/manual/status_cxx2020.xml: Update P0608R3, P0777R1, and
1615         P1165R1 entries.
1616         * doc/html/*: Regenerate.
1617         * include/std/tuple (make_from_tuple): Use remove_reference_t instead
1618         of decay_t (P0777R1).
1619
1620 2019-05-17  François Dumont  <fdumont@gcc.gnu.org>
1621
1622         Move from state of allocators (LWG2593)
1623         * include/bits/stl_deque.h
1624         (_Deque_base(_Deque_base&&, false_type)): Remove.
1625         (_Deque_base(_Deque_base&&, true_type)): Remove.
1626         (_Deque_base(_Deque_base&&)): Adapt.
1627         (_Deque_base::_M_move_impl()): Remove.
1628         * testsuite/util/testsuite_allocator.h
1629         (propagating_allocator(propagating_allocator&&)): Preserve move from
1630         state.
1631         * testsuite/23_containers/deque/allocator/move_assign.cc (test02):
1632         Adapt.
1633         * testsuite/23_containers/forward_list/allocator/move_assign.cc (test02):
1634         Adapt.
1635         * testsuite/23_containers/list/allocator/move_assign.cc (test02): Adapt.
1636         * testsuite/23_containers/map/allocator/move_assign.cc (test02): Adapt.
1637         * testsuite/23_containers/multimap/allocator/move_assign.cc (test02):
1638         Adapt.
1639         * testsuite/23_containers/multiset/allocator/move_assign.cc (test02):
1640         Adapt.
1641         * testsuite/23_containers/set/allocator/move_assign.cc (test02): Adapt.
1642         * testsuite/23_containers/unordered_map/allocator/move_assign.cc
1643         (test02): Adapt.
1644         * testsuite/23_containers/unordered_multimap/allocator/move_assign.cc
1645         (test02): Adapt.
1646         * testsuite/23_containers/unordered_multiset/allocator/move_assign.cc
1647         (test02): Adapt.
1648         * testsuite/23_containers/unordered_set/allocator/move_assign.cc
1649         (test02): Adapt.
1650         * testsuite/23_containers/vector/allocator/move_assign.cc (test02):
1651         Adapt.
1652         * testsuite/23_containers/vector/bool/allocator/move_assign.cc (test02):
1653         Adapt.
1654         * testsuite/21_strings/basic_string/allocator/char/move_assign.cc
1655         (test02): Adapt.
1656         * testsuite/21_strings/basic_string/allocator/wchar_t/move_assign.cc
1657         (test02): Adapt.
1658
1659 2019-05-16  Jonathan Wakely  <jwakely@redhat.com>
1660
1661         * src/c++17/fs_ops.cc (absolute(const path&, error_code&))
1662         [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Remove bogus assertion.
1663
1664         * include/std/variant (__overload_set): Remove.
1665         (_Arr): New helper.
1666         (_Build_FUN): New class template to define a single FUN overload,
1667         with specializations to prevent unwanted conversions, as per P0608R3.
1668         (_Build_FUNs): New class template to build an overload set of FUN.
1669         (_FUN_type): New alias template to perform overload resolution.
1670         (__accepted_type): Use integer_constant base for failure case. Use
1671         _FUN_type for successful case.
1672         (variant::__accepted_index): Use _Tp instead of _Tp&&.
1673         (variant::variant(_Tp&&)): Likewise.
1674         (variant::operator=(_Tp&&)): Likewise.
1675
1676         * include/std/variant (_Variant_storage<false, _Types...>::_M_reset):
1677         Replace raw visitation with a runtime check for the valueless state
1678         and a non-raw visitor.
1679         (_Variant_storage<false, _Types...>::_M_reset_impl): Remove.
1680         (variant::index()): Remove branch.
1681         (variant::swap(variant&)): Use valueless_by_exception() instead of
1682         comparing the index to variant_npos, and add likelihood attribute.
1683
1684         * include/bits/hashtable_policy.h (_Equal_helper): Remove.
1685         (_Hashtable_base::_Equal_hash_code): Define new class template.
1686         (_Hashtable_base::_M_equals): Use _Equal_hash_code instead of
1687         _Equal_helper.
1688
1689         * include/bits/hashtable_policy.h (_Hashtable_ebo_helper::_S_get):
1690         Replace with _M_get non-static member function.
1691         (_Hashtable_ebo_helper::_S_cget): Replace with _M_cget non-static
1692         member function.
1693         (_Hash_code_base, _Local_iterator_base, _Hashtable_base):
1694         (_Hashtable_alloc): Adjust to use non-static members of EBO helper.
1695
1696         * include/bits/hashtable_policy.h (_Hash_code_base::_M_swap): Use
1697         _S_get accessors for members in EBO helpers.
1698         (_Hash_code_base::_M_extract(), _Hash_code_base::_M_ranged_hash())
1699         (_Hash_code_base::_M_h1(), _Hash_code_base::_M_h2()): Remove non-const
1700         overloads.
1701         (_Hashtable_base::_M_swap): Use _S_get accessors for members in EBO
1702         helpers.
1703         (_Hashtable_base::_M_eq()): Remove non-const overload.
1704
1705 2019-05-15  Jonathan Wakely  <jwakely@redhat.com>
1706
1707         * include/std/variant (visit, visit<R>): Qualify calls to __do_visit.
1708
1709 2019-05-14  Jonathan Wakely  <jwakely@redhat.com>
1710
1711         * testsuite/util/testsuite_allocator.h (NullablePointer::operator bool):
1712         Fix return value.
1713
1714 2019-05-14  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
1715
1716         * config/os/solaris/solaris2.10: Move to ...
1717         * config/os/solaris: ... this.
1718         * configure.host (os_include_dir): Adapt.
1719         (abi_baseline_pair): Remove Solaris 10 handling.
1720         * config/abi/post/i386-solaris2.10: Remove.
1721         * config/abi/post/sparc-solaris2.10: Remove.
1722         * config/abi/post/i386-solaris2.11: Rename to ...
1723         * config/abi/post/i386-solaris: ... this.
1724         * config/abi/post/sparc-solaris2.11: Rename to ...
1725         * config/abi/post/sparc-solaris: ... this.
1726
1727         * libsupc++/new_opa.cc [_GLIBCXX_HAVE_MEMALIGN] [__sun]: Remove
1728         workaround.
1729
1730         * testsuite/ext/enc_filebuf/char/13598.cc: Remove *-*-solaris2.10
1731         xfail.
1732
1733 2019-05-14  Jonathan Wakely  <jwakely@redhat.com>
1734
1735         * include/std/variant (__visit_with_index): Remove typedef.
1736         (__deduce_visit_result): New tag type.
1737         (__raw_visit, __raw_idx_visit): New helper functions for "raw"
1738         visitation of possibly-valueless variants, forwarding to __do_visit
1739         with the relevant tag type.
1740         (_Variant_storage<false, _Types...>::_M_reset_impl): Use __raw_visit
1741         and make lambda return void.
1742         (__variant_construct): Likewise.
1743         (_Copy_assign_base::operator=, _Move_assign_base::operator=): Use
1744         __raw_idx_visit and make lambda return void.
1745         (_Multi_array::__untag_result): Add metafunction to check the function
1746         pointer type for a tag type that dictates the kind of visitation.
1747         (_Multi_array<_Ret(*)(_Visitor, _Variants...), __first, __rest...>):
1748         Use decltype(auto) instead of tagged function pointer type.
1749         (__gen_vtable_impl): Remove bool non-type parameter and unused
1750         _Variant_tuple parameter.
1751         (__gen_vtable_impl::__visit_invoke_impl): Remove.
1752         (__gen_vtable_impl::__do_visit_invoke): Remove.
1753         (__gen_vtable_impl::__do_visit_invoke_r): Remove.
1754         (__gen_vtable_impl::__visit_invoke): Use if-constexpr and __invoke_r
1755         for the visit<R> case, rather than dispatching to separate functions.
1756         (_VARIANT_RELATION_FUNCTION_TEMPLATE): Use __raw_idx_visit and make
1757         lambda return void.
1758         (variant::swap): Likewise.
1759         (__do_visit): Replace two non-type template parameters with a single
1760         type parameter, so that the caller must specify the visitor's return
1761         type (or one of the tag types).
1762         (visit): Deduce a return type from the visitor and use the
1763         __deduce_visit_result tag to enforce that all overloads return the
1764         same type.
1765         (visit<R>): Call __do_visit<R> with explicit result type.
1766         (__variant_hash_call_base_impl::operator()): Use __raw_visit and make
1767         lambda return void.
1768
1769 2019-05-14  Nina Dinka Ranns  <dinka.ranns@gmail.com>
1770
1771         nonesuch is insufficiently useless (lwg2996)
1772         * include/std/type_traits (struct __nonesuch): Added private base
1773         class to make __nonesuch not an aggregate and removed deleted default
1774         constructor.
1775         * include/bits/stl_pair.h (struct __nonesuch_no_braces): Removed.
1776         (operator=(const pair&)): Use __nonesuch instead of
1777         __nonesuch_no_braces.
1778         (operator=(pair&&)): Likewise
1779         * include/std/tuple (operator=(const tuple&)): Use __nonesuch instead
1780         of __nonesuch_no_braces.
1781         (operator=(tuple&&)): Likewise
1782         * include/experimental/type_traits (struct nonesuch): Added private
1783         base class to make nonesuch not an aggregate and removed deleted
1784         default constructor.
1785         * testsuite/20_util/nonesuch/nonesuch.cc: New.
1786         * testsuite/experimental/type_traits/nonesuch.cc: New.
1787
1788 2019-05-14  Jonathan Wakely  <jwakely@redhat.com>
1789
1790         * include/bits/std_function.h (_Simple_type_wrapper): Remove.
1791         (_Function_handler): Remove partial specializations for void return
1792         types and pointers to member.
1793         (_Function_handler::_M_manager): Adapt to removal of
1794         _Simple_type_wrapper.
1795         (_Function_handler::_M_invoke): Use __invoke_r instead of __invoke.
1796         * include/std/functional (_Bind_result::__enable_if_void)
1797         (_Bind_result::__disable_if_void): Remove sfinae helpers.
1798         (_Bind_result::__call): Use __invoke_r and remove overloads for void
1799         return types.
1800         * include/std/future (__future_base::_Task_state::_M_run)
1801         (__future_base::_Task_state::_M_run_delayed): Use __invoke_r and
1802         change return type of lambda expressions.
1803
1804         * include/bits/invoke.h (__invoke_r): Define new function implementing
1805         the INVOKE<R> pseudo-function.
1806         * testsuite/20_util/function_objects/invoke/1.cc: Add more tests.
1807         * testsuite/20_util/function_objects/invoke/2.cc: New test.
1808
1809         * include/std/type_traits (__is_nt_convertible_helper): Define it
1810         unconditionally, not only for C++20.
1811         (__is_nothrow_convertible): Define internal trait for use in C++11.
1812         (__is_nt_invocable_impl: Fix by using __is_nothrow_convertible.
1813         (is_invocable_r_v, is_nothrow_invocable_r_v): Add missing parameter.
1814         * testsuite/20_util/is_nothrow_convertible/value_ext.cc: New test.
1815         * testsuite/20_util/is_nothrow_convertible/value.cc: Check with type
1816         that has nothrow explicit conversion but potentially-throwing implicit
1817         conversion.
1818         * testsuite/20_util/is_nothrow_invocable/value.cc: Likewise.
1819         * testsuite/20_util/is_nothrow_invocable/value_ext.cc: Fix helper
1820         function to only consider implicit conversions.
1821         * testsuite/20_util/tuple/cons/noexcept_specs.cc: Add comment.
1822
1823         * include/std/iterator: Include <iosfwd> instead of <istream> and
1824         <ostream>.
1825
1826         * include/bits/stl_tree.h (_Rb_tree::erase(const Key*, const Key*)):
1827         Remove unused, non-standard function.
1828
1829         * include/bits/regex.h (match_results::max_size()): Adjust return
1830         value to account for prefix/suffix/unmatched subs.
1831         (match_results::_M_resize(unsigned int)): Use _Base_type::assign to
1832         reset the contained sub matches.
1833         (match_results::_M_establish_failed_match(_Bi_iter)): Add new member
1834         function to set result state following a failed match.
1835         * include/bits/regex.tcc (__regex_algo_impl): Remove loop to set
1836         sub_match states after _M_resize. Use _M_establish_failed_match.
1837
1838         PR libstdc++/69724
1839         * include/std/thread (thread::_State_impl, thread::_S_make_state):
1840         Replace single _Callable parameter with variadic _Args pack, to
1841         forward them directly to the tuple of decayed copies.
1842         * testsuite/30_threads/thread/cons/69724.cc: New test.
1843
1844 2019-05-14  Nina Dinka Ranns  <dinka.ranns@gmail.com>
1845
1846         Inconsistency wrt Allocators in basic_string assignment (LWG2579)
1847         * include/bits/basic_string.h: (operator=(const basic_string&):
1848         Move allocator decision to assign.
1849         (assign(const basic_string&)): Move allocator decision here.
1850         * testsuite/21_strings/basic_string/allocator/char/copy_assign.cc:
1851         Add tests.
1852         * testsuite/21_strings/basic_string/allocator/wchar_t/copy_assign.cc:
1853         Add tests.
1854
1855 2019-05-14  Jonathan Wakely  <jwakely@redhat.com>
1856
1857         * testsuite/util/testsuite_allocator.h (memory_resource)
1858         (default_resource_mgr): Fix indentation.
1859
1860         * testsuite/20_util/allocator_traits/members/allocate_hint_nonpod.cc:
1861         Use operator-> to access raw pointer member.
1862         * testsuite/23_containers/vector/59829.cc: Likewise.
1863         * testsuite/23_containers/vector/bool/80893.cc: Likewise.
1864         * testsuite/libstdc++-prettyprinters/cxx11.cc: Use NullablePointer.
1865         * testsuite/util/testsuite_allocator.h (NullablePointer): New utility
1866         for tests.
1867         (PointerBase, PointerBase_void): Derive from NullablePointer and use
1868         its constructors and equality operators. Change converting
1869         constructors to use operator-> to access private member of the other
1870         pointer type.
1871         (PointerBase_void::operator->()): Add, for access to private member.
1872         (operator-(PointerBase, PointerBase)): Change to hidden friend.
1873         (operator==(PointerBase, PointerBase)): Remove.
1874         (operator!=(PointerBase, PointerBase)): Remove.
1875
1876         * python/libstdcxx/v6/printers.py (UniquePointerPrinter.__init__): Do
1877         not assume field called _M_head_impl is the first tuple element.
1878         * testsuite/libstdc++-prettyprinters/compat.cc: Make tuple
1879         implementation more accurate.
1880         * testsuite/libstdc++-prettyprinters/cxx11.cc: Check unique_ptr with
1881         empty pointer type and non-empty deleter.
1882
1883         LWG 2899 - Make is_move_constructible correct for unique_ptr
1884         * include/bits/unique_ptr.h (__uniq_ptr_impl): Add move constructor,
1885         move assignment operator.
1886         (__uniq_ptr_impl::release(), __uniq_ptr_impl::reset(pointer)): Add.
1887         (__uniq_ptr_data): New class template with conditionally deleted
1888         special members.
1889         (unique_ptr, unique_ptr<T[], D>): Change type of data member from
1890         __uniq_ptr_impl<T, D> to __uniq_ptr_data<T, D>. Define move
1891         constructor and move assignment operator as defaulted.
1892         (unique_ptr::release(), unique_ptr<T[], D>::release()): Forward to
1893         __uniq_ptr_impl::release().
1894         (unique_ptr::reset(pointer), unique_ptr<T[], D>::reset<U>(U)): Forward
1895         to __uniq_ptr_impl::reset(pointer).
1896         * python/libstdcxx/v6/printers.py (UniquePointerPrinter.__init__):
1897         Check for new __uniq_ptr_data type.
1898         * testsuite/20_util/unique_ptr/dr2899.cc: New test.
1899
1900 2019-05-13  Jonathan Wakely  <jwakely@redhat.com>
1901
1902         PR libstdc++/90454.cc path construction from void*
1903         * include/bits/fs_path.h (path::_Path): Use remove_pointer so that
1904         pointers to void are rejected as well as void.
1905         * include/experimental/bits/fs_path.h (path::_Path): Likewise.
1906         * testsuite/27_io/filesystem/path/construct/80762.cc: Also check
1907         pointers to void.
1908         * testsuite/experimental/filesystem/path/construct/80762.cc: Likewise.
1909
1910         * doc/xml/manual/policy_data_structures.xml: Comment out stray
1911         <remark> elements. Fix formatting of bibliography references.
1912
1913 2019-05-13  Edward Smith-Rowland  <3dw4rd@verizon.net>
1914
1915         * doc/xml/manual/status_cxx2020.xml: Document P0811R3 status.
1916
1917 2019-05-13  Jonathan Wakely  <jwakely@redhat.com>
1918
1919         Remove Profile Mode, deprecated since 7.1.0
1920         * doc/Makefile.am: Remove XML file for profile mode docs.
1921         * doc/Makefile.in: Regenerate.
1922         * doc/xml/authors.xml: Remove authors of profile mode docs.
1923         * doc/xml/manual/appendix_contributing.xml: Remove mention of profile
1924         mode.
1925         * doc/xml/manual/debug.xml: Likewise.
1926         * doc/xml/manual/evolution.xml: Document removal of profile mode.
1927         * doc/xml/manual/profile_mode.xml: Remove profile mode docs.
1928         * doc/xml/manual/spine.xml: Remove profile mode author credit.
1929         * doc/xml/manual/test.xml: Remove docs for dg-require-profile-mode
1930         directive.
1931         * doc/xml/manual/using.xml: Remove docs for profile mode headers and
1932         macro.
1933         * doc/html/*: Regenerate.
1934         * include/Makefile.am: Remove profile mode headers.
1935         * include/Makefile.in: Regenerate.
1936         * include/bits/c++config (std::__profile): Remove namespace.
1937         [_GLIBCXX_PROFILE]: Remove checks for macro.
1938         * include/profile/array: Remove.
1939         * include/profile/base.h: Remove.
1940         * include/profile/bitset: Remove.
1941         * include/profile/deque: Remove.
1942         * include/profile/forward_list: Remove.
1943         * include/profile/impl/profiler.h: Remove.
1944         * include/profile/impl/profiler_algos.h: Remove.
1945         * include/profile/impl/profiler_container_size.h: Remove.
1946         * include/profile/impl/profiler_hash_func.h: Remove.
1947         * include/profile/impl/profiler_hashtable_size.h: Remove.
1948         * include/profile/impl/profiler_list_to_slist.h: Remove.
1949         * include/profile/impl/profiler_list_to_vector.h: Remove.
1950         * include/profile/impl/profiler_map_to_unordered_map.h: Remove.
1951         * include/profile/impl/profiler_node.h: Remove.
1952         * include/profile/impl/profiler_state.h: Remove.
1953         * include/profile/impl/profiler_trace.h: Remove.
1954         * include/profile/impl/profiler_vector_size.h: Remove.
1955         * include/profile/impl/profiler_vector_to_list.h: Remove.
1956         * include/profile/iterator_tracker.h: Remove.
1957         * include/profile/list: Remove.
1958         * include/profile/map: Remove.
1959         * include/profile/map.h: Remove.
1960         * include/profile/multimap.h: Remove.
1961         * include/profile/multiset.h: Remove.
1962         * include/profile/ordered_base.h: Remove.
1963         * include/profile/set: Remove.
1964         * include/profile/set.h: Remove.
1965         * include/profile/unordered_base.h: Remove.
1966         * include/profile/unordered_map: Remove.
1967         * include/profile/unordered_set: Remove.
1968         * include/profile/vector: Remove.
1969         * scripts/run_doxygen: Do not process profile mode headers.
1970         * testsuite/23_containers/array/element_access/60497.cc: Don't use
1971         profile mode type.
1972         * testsuite/23_containers/array/specialized_algorithms/swap_cxx17.cc:
1973         Remove dg-skip-if for profile mode.
1974         * testsuite/23_containers/forward_list/capacity/1.cc: Remove
1975         preprocessor check for profile mode.
1976         * testsuite/23_containers/list/capacity/29134.cc: Likewise.
1977         * testsuite/23_containers/map/modifiers/extract.cc: Remove dg-skip-if
1978         for profile mode.
1979         * testsuite/23_containers/map/modifiers/insert_or_assign/1.cc:
1980         Likewise.
1981         * testsuite/23_containers/map/modifiers/try_emplace/1.cc: Likewise.
1982         * testsuite/23_containers/multimap/modifiers/extract.cc: Likewise.
1983         * testsuite/23_containers/multiset/modifiers/extract.cc: Likewise.
1984         * testsuite/23_containers/set/modifiers/extract.cc: Likewise.
1985         * testsuite/23_containers/unordered_map/modifiers/extract.cc:
1986         Likewise.
1987         * testsuite/23_containers/unordered_multimap/modifiers/extract.cc:
1988         Likewise.
1989         * testsuite/23_containers/unordered_multiset/modifiers/extract.cc:
1990         Likewise.
1991         * testsuite/23_containers/unordered_set/modifiers/extract.cc:
1992         Likewise.
1993         * testsuite/23_containers/vector/bool/capacity/29134.cc: Remove
1994         preprocessor check for profile mode.
1995         * testsuite/23_containers/vector/bool/modifiers/insert/31370.cc:
1996         Likewise.
1997         * testsuite/23_containers/vector/modifiers/insert_vs_emplace.cc:
1998         Remove dg-skip-if for profile mode.
1999         * testsuite/25_algorithms/binary_search/partitioned.cc: Likewise.
2000         * testsuite/25_algorithms/equal_range/partitioned.cc: Likewise.
2001         * testsuite/25_algorithms/lexicographical_compare/71545.cc: Likewise.
2002         * testsuite/25_algorithms/lower_bound/partitioned.cc: Likewise.
2003         * testsuite/25_algorithms/upper_bound/partitioned.cc: Likewise.
2004         * testsuite/Makefile.am: Remove profile_flags variable and
2005         * testsuite/Makefile.am: Remove profile_flags variable and
2006         check-profile target.
2007         * testsuite/Makefile.in: Regenerate.
2008         * testsuite/ext/profile/all.cc: Remove.
2009         * testsuite/ext/profile/mutex_extensions_neg.cc: Remove.
2010         * testsuite/ext/profile/profiler_algos.cc: Remove.
2011         * testsuite/ext/profile/replace_new.cc: Remove.
2012         * testsuite/ext/throw_allocator/deallocate_global.cc: Remove
2013         preprocessor check for profile mode.
2014         * testsuite/ext/throw_allocator/deallocate_local.cc: Likewise.
2015         * testsuite/lib/libstdc++.exp (check_v3_target_profile_mode): Remove.
2016         (check_v3_target_normal_mode): Do not check for profile mode macro.
2017         * testsuite/libstdc++-prettyprinters/80276.cc: Remove dg-skip-if for
2018         profile mode.
2019         * testsuite/libstdc++-prettyprinters/compat.cc: Likewise.
2020         * testsuite/libstdc++-prettyprinters/cxx11.cc: Likewise.
2021         * testsuite/libstdc++-prettyprinters/cxx17.cc: Likewise.
2022         * testsuite/libstdc++-prettyprinters/debug.cc: Likewise.
2023         * testsuite/libstdc++-prettyprinters/debug_cxx11.cc: Likewise.
2024         * testsuite/libstdc++-prettyprinters/libfundts.cc: Likewise.
2025         * testsuite/libstdc++-prettyprinters/simple.cc: Likewise.
2026         * testsuite/libstdc++-prettyprinters/simple11.cc: Likewise.
2027         * testsuite/libstdc++-prettyprinters/whatis.cc: Likewise.
2028         * testsuite/libstdc++-prettyprinters/whatis2.cc: Likewise.
2029
2030         Remove array_allocator extension, deprecated since 4.9.0
2031         * doc/xml/manual/allocator.xml: Remove documentation for
2032         array_allocator.
2033         * doc/xml/manual/evolution.xml: Document array_allocator removal.
2034         * doc/xml/manual/using.xml: Remove header from documentation.
2035         * include/Makefile.am: Remove <ext/array_allocator.h> header.
2036         * include/Makefile.in: Regenerate.
2037         * include/ext/array_allocator.h: Remove.
2038         * include/precompiled/extc++.h: Do not include removed header.
2039         * testsuite/ext/array_allocator/1.cc: Remove.
2040         * testsuite/ext/array_allocator/2.cc: Remove.
2041         * testsuite/ext/array_allocator/26875.cc: Remove.
2042         * testsuite/ext/array_allocator/3.cc: Remove.
2043         * testsuite/ext/array_allocator/check_deallocate_null.cc: Remove.
2044         * testsuite/ext/array_allocator/check_delete.cc: Remove.
2045         * testsuite/ext/array_allocator/check_new.cc: Remove.
2046         * testsuite/ext/array_allocator/variadic_construct.cc: Remove.
2047         * testsuite/ext/headers.cc: Do not include removed header.
2048
2049 2019-05-11  François Dumont  <fdumont@gcc.gnu.org>
2050
2051         * include/bits/stl_bvector.h
2052         (operator==(const _Bit_iterator_base&, const _Bit_iterator_base&)):
2053         Make hidden friend.
2054         (operator<(const _Bit_iterator_base&, const _Bit_iterator_base&)):
2055         Likewise.
2056         (operator!=(const _Bit_iterator_base&, const _Bit_iterator_base&)):
2057         Likewise.
2058         (operator>(const _Bit_iterator_base&, const _Bit_iterator_base&)):
2059         Likewise.
2060         (operator<=(const _Bit_iterator_base&, const _Bit_iterator_base&)):
2061         Likewise.
2062         (operator>=(const _Bit_iterator_base&, const _Bit_iterator_base&)):
2063         Likewise.
2064         (operator-(const _Bit_iterator_base&, const _Bit_iterator_base&)):
2065         Likewise.
2066         (_Bit_iterator::operator+(difference_type)): Likewise and allow NRVO
2067         copy elision.
2068         (_Bit_iterator::operator-(difference_type)): Likewise.
2069         (operator+(ptrdiff_t, const _Bit_iterator&)): Make hidden friend.
2070         (_Bit_const_iterator::operator+(difference_type)): Likewise and allow
2071         NRVO copy elision.
2072         (_Bit_const_iterator::operator-(difference_type)): Likewise.
2073         (operator+(ptrdiff_t, const _Bit_const_iterator&)): Make hidden friend.
2074
2075 2019-05-10  Jonathan Wakely  <jwakely@redhat.com>
2076
2077         PR libstdc++/81266
2078         * testsuite/util/thread/all.h: Do not use remove_pointer for
2079         std::thread::native_handle_type.
2080
2081         PR libstdc++/90397
2082         * include/std/variant (_Variant_storage<false, Types...>::_M_storage())
2083         (_Variant_storage<true, Types...>::_M_reset()))
2084         (_Variant_storage<true, Types...>::_M_storage())): Add noexcept.
2085         (__get_storage): Likewise.
2086         (variant): Add noexcept to friend declarations for __get and
2087         __get_storage.
2088
2089         PR libstdc++/90388
2090         * include/bits/unique_ptr.h (default_delete, default_delete<T[]>):
2091         Use _Require for constraints.
2092         (operator>(nullptr_t, const unique_ptr<T,D>&)): Implement exactly as
2093         per the standard.
2094         (__uniq_ptr_hash): New base class with conditionally-disabled call
2095         operator.
2096         (hash<unique_ptr<T,D>>): Derive from __uniq_ptr_hash.
2097         * testsuite/20_util/default_delete/48631_neg.cc: Adjust dg-error line.
2098         * testsuite/20_util/unique_ptr/hash/90388.cc: New test.
2099
2100         * include/bits/shared_ptr.h: Improve docs.
2101         * include/bits/shared_ptr_base.h: Likewise.
2102         * include/bits/stl_uninitialized.h: Likewise.
2103         * include/bits/unique_ptr.h: Likewise.
2104         * libsupc++/new: Likewise.
2105
2106 2019-05-09  François Dumont  <fdumont@gcc.gnu.org>
2107
2108         * include/bits/stl_deque.h
2109         (operator==(const _Deque_iterator<>&, const _Deque_iterator<>&)):
2110         Make hidden friend.
2111         (operator!=(const _Deque_iterator<>&, const _Deque_iterator<>&)):
2112         Likewise.
2113         (operator<(const _Deque_iterator<>&, const _Deque_iterator<>&)):
2114         Likewise.
2115         (operator<=(const _Deque_iterator<>&, const _Deque_iterator<>&)):
2116         Likewise.
2117         (operator>(const _Deque_iterator<>&, const _Deque_iterator<>&)):
2118         Likewise.
2119         (operator>=(const _Deque_iterator<>&, const _Deque_iterator<>&)):
2120         Likewise.
2121         (_Deque_iterator<>::operator+(difference_type)): Likewise and allow NRVO
2122         copy elision.
2123         (_Deque_iterator<>::operator-(difference_type)): Likewise.
2124
2125 2019-05-08  François Dumont  <fdumont@gcc.gnu.org>
2126
2127         PR libstdc++/90277
2128         * testsuite/23_containers/unordered_multiset/insert/24061-multiset.cc
2129         (test01): Reserve for number of insertions to avoid rehash during test.
2130         * testsuite/23_containers/unordered_multimap/insert/24061-multimap.cc
2131         (test01): Likewise.
2132         * testsuite/23_containers/unordered_multimap/insert/24061-multimap.cc
2133         (test01): Likewise.
2134         (test02): Likewise.
2135         (test03): Likewise.
2136
2137 2019-05-08  Jonathan Wakely  <jwakely@redhat.com>
2138
2139         * include/experimental/bits/fs_path.h: Improve docs.
2140         * include/experimental/bits/net.h: Fix wrong header name in comment.
2141         Do not document implementation details.
2142         * include/experimental/netfwd: Fix doxygen grouping.
2143
2144 2019-05-07  Jonathan Wakely  <jwakely@redhat.com>
2145
2146         * include/bits/stl_pair.h: Improve docs.
2147         * include/std/tuple: Likewise.
2148
2149         * doc/doxygen/doxygroups.cc (std::literals): Add documentation for
2150         inline namespace.
2151         * include/std/chrono: Improve docs.
2152         * include/std/ratio: Do not document implementation details.
2153         * testsuite/20_util/ratio/cons/cons_overflow_neg.cc: Adjust dg-error
2154         line numbers.
2155         * testsuite/20_util/ratio/operations/ops_overflow_neg.cc: Likewise.
2156
2157         PR libstdc++/89102
2158         * doc/xml/manual/intro.xml: Document DR 2408 and 2465 changes.
2159         * include/std/chrono (__duration_common_type_wrapper): Replace with ...
2160         (__duration_common_type): New helper.
2161         (common_type<chrono::duration<R1, P2>, chrono::duration<R2, P2>>): Use
2162         __duration_common_type.
2163         (__timepoint_common_type_wrapper): Replace with ...
2164         (__timepoint_common_type): New helper.
2165         (common_type<chrono::time_point<C, D2>, chrono::time_point<C, D2>>):
2166         Use __time_point_common_type.
2167         * include/std/type_traits (common_type<>): Define, as per LWG 2408.
2168         (__common_type_impl): If either argument is transformed by decay,
2169         use the common_type of the decayed types.
2170         (__common_type_impl<_Tp, _Up, _Tp, _Up>): If the types are already
2171         decayed, use __do_common_type_impl to get the common_type.
2172         (common_type<_Tp>): Use common_type<_Tp, _Tp>.
2173         (__do_member_type_wrapper, __member_type_wrapper)
2174         (__expanded_common_type_wrapper): Remove.
2175         (__common_type_pack, __common_type_fold): New helpers.
2176         (common_type<_Tp, _Up, _Vp...>): Use new helpers instead of
2177         __member_type_wrapper and __expanded_common_type_wrapper.
2178         * testsuite/20_util/common_type/requirements/explicit_instantiation.cc:
2179         Test zero-length template argument list.
2180         * testsuite/20_util/common_type/requirements/sfinae_friendly_1.cc:
2181         Test single argument cases and argument types that should decay.
2182         * testsuite/20_util/common_type/requirements/sfinae_friendly_2.cc:
2183         Adjust expected error.
2184         * testsuite/20_util/duration/literals/range_neg.cc: Use zero for
2185         dg-error lineno.
2186         * testsuite/20_util/duration/requirements/typedefs_neg1.cc: Likewise.
2187         * testsuite/20_util/duration/requirements/typedefs_neg2.cc: Likewise.
2188         * testsuite/20_util/duration/requirements/typedefs_neg3.cc: Likewise.
2189
2190         * doc/xml/manual/intro.xml: Fix DR 2537 and DR 2566 confusion.
2191
2192 2019-05-01  Nina Dinka Ranns  <dinka.ranns@gmail.com>
2193
2194         Make allocator propagation more consistent for
2195         operator+(basic_string) (P1165R1)
2196         * include/bits/basic_string.h
2197         (operator+(basic_string&&, basic_string&&): Changed resulting
2198         allocator to always be the one from the first parameter.
2199         * include/bits/basic_string.tcc
2200         (operator+(const _CharT*, const basic_string&)): Changed
2201         resulting allocator to be SOCCC on the second parameter's allocator.
2202         (operator+(_CharT, const basic_string&)): Likewise.
2203         * testsuite/21_strings/basic_string/allocator/char/operator_plus.cc:
2204         New.
2205         * testsuite/21_strings/basic_string/allocator/wchar_t/operator_plus.cc:
2206         New.
2207
2208 2019-05-07  Jonathan Wakely  <jwakely@redhat.com>
2209
2210         * include/bits/regex.h: Improve docs.
2211         * include/bits/regex.tcc: Do not document implementation details.
2212
2213         * testsuite/19_diagnostics/error_code/hash.cc: New test.
2214
2215 2019-05-06  François Dumont  <fdumont@gcc.gnu.org>
2216
2217         * python/libstdcxx/v6/printers.py (add_one_template_type_printer):
2218         Add type printer for container types in std::__debug namespace.
2219         * testsuite/lib/gdb-test.exp (whatis-regexp-test): New.
2220         (gdb-tests): Use distinct parameters for the type of test and use of
2221         regex.
2222         (gdb-test): Check for regex test even if 'whatis' test.
2223         * testsuite/libstdc++-prettyprinters/80276.cc: Adapt for _GLIBCXX_DEBUG
2224         mode.
2225         * testsuite/libstdc++-prettyprinters/cxx11.cc: Likewise.
2226         * testsuite/libstdc++-prettyprinters/cxx17.cc: Likewise.
2227         * testsuite/libstdc++-prettyprinters/libfundts.cc: Likewise.
2228         * testsuite/libstdc++-prettyprinters/simple.cc: Likewise.
2229         * testsuite/libstdc++-prettyprinters/simple11.cc: Likewise.
2230         * testsuite/libstdc++-prettyprinters/whatis.cc: Likewise.
2231         * testsuite/libstdc++-prettyprinters/whatis2.cc: Likewise.
2232
2233 2019-05-04  Jonathan Wakely  <jwakely@redhat.com>
2234
2235         * include/std/system_error (error_category): Fix comment.
2236
2237         PR libstdc++/90299
2238         * src/c++17/fs_ops.cc (absolute(const path&)): Report an error if the
2239         argument is an empty path.
2240         (absolute(const path&, error_code&)): Use invalid_argument as error
2241         code instead of no_such_file_or_directory.
2242         * testsuite/27_io/filesystem/operations/absolute.cc: Check handling
2243         of non-existent paths and empty paths with both overloads of absolute.
2244
2245         * include/std/system_error (error_category, error_code)
2246         (error_condition): Improve docs.
2247         * libsupc++/exception: Add missing @addtogroup Doxygen command.
2248         * libsupc++/exception_ptr.h (exception_ptr): Link equality operators
2249         to class documentation. Suppress documentation for implementation
2250         details.
2251         * libsupc++/nested_exception.h (throw_with_nested, rethrow_if_nested):
2252         Suppress documentation for implementation details.
2253
2254         * include/std/system_error (error_code): Remove friend declaration
2255         for hash<error_code>.
2256         (hash<error_code>::operator()): Use public member functions to access
2257         value and category.
2258         (hash<error_condition>::operator()): Use address of category, not
2259         its object representation.
2260         * src/c++11/compatibility-c++0x.cc (hash<error_code>::operator()):
2261         Use public member functions to access value and category.
2262         * testsuite/19_diagnostics/error_condition/hash.cc: New test.
2263
2264 2019-05-04  François Dumont  <fdumont@gcc.gnu.org>
2265
2266         * include/bits/hashtable.h (_Hashtable<>::rehash): Review comment.
2267         * include/bits/hashtable_policy.h
2268         (_Prime_rehash_policy::_M_bkt_for_elements): Use __builtin_ceill.
2269         (_Power2_rehash_policy::_M_bkt_for_elements): Likewise.
2270         (_Power2_rehash_policy::_M_next_bkt): Enforce returning a result not
2271         smaller than input value rather than always greater. Preserve
2272         _M_next_resize if called with 0 input. Use __builtin_floorl.
2273         (_Power2_rehash_policy::_M_need_rehash): Rehash only if number of
2274         elements + number of insertions is greater than _M_next_resize. Start
2275         with 11 buckets if not told otherwise. Use __builtin_floorl.
2276         (_Rehash_base<>::reserve): Use rehash policy _M_bkt_for_elements.
2277         * src/c++11/hashtable_c++0x.cc (_Prime_rehash_policy::_M_next_bkt):
2278         Preserve _M_next_resize if called with 0 input. Use __builtin_floorl.
2279         (_Prime_rehash_policy::_M_need_rehash): Start with 11 buckets if not
2280         told otherwise. Use __builtin_floorl.
2281         * testsuite/23_containers/unordered_set/hash_policy/71181.cc: Adapt test
2282         to also validate _Power2_rehash_policy.
2283         * testsuite/23_containers/unordered_set/hash_policy/power2_rehash.cc:
2284         Adapt.
2285
2286 2019-05-03  Jonathan Wakely  <jwakely@redhat.com>
2287
2288         PR libstdc++/61761
2289         * testsuite/26_numerics/complex/proj.cc: Don't assume <cmath> defines
2290         std::copysign.
2291
2292         PR libstdc++/52119
2293         * include/ext/numeric_traits.h (__glibcxx_min): Avoid integer
2294         overflow warning with -Wpedantic -Wsystem-headers.
2295
2296 2019-05-02  Jonathan Wakely  <jwakely@redhat.com>
2297
2298         PR libstdc++/90314
2299         * include/bits/c++config (_GLIBCXX_NOEXCEPT_IF): Use variadic macro.
2300         * include/bits/move.h (swap): Remove extra parentheses.
2301
2302         * include/experimental/bits/lfts_config.h: Improve doc markup.
2303         * include/experimental/optional: Improve docs.
2304         (_Has_addressof_mem, _Has_addressof_free, _Has_addressof)
2305         (__constexpr_addressof): Remove.
2306         (optional::operator->()): Use std::__addressof().
2307         * include/std/optional (optional::operator->()): Adjust whitespace.
2308         * testsuite/experimental/optional/constexpr/observers/2.cc: Check
2309         that operator-> is still constexpr with overloaded operator&. Change
2310         to compile-only test.
2311         * testsuite/experimental/optional/constexpr/observers/3.cc: Change to
2312         compile-only test.
2313
2314         * include/bits/shared_ptr.h: Improve docs.
2315         * include/bits/shared_ptr_atomic.h: Likewise.
2316         * include/bits/unique_ptr.h: Likewise. Adjust whitespace.
2317
2318         * include/bits/basic_string.h: Fix iterator/index confusion in
2319         Doxygen comments.
2320         * include/bits/range_access.h: Fix Doxygen warnings.
2321         * include/bits/refwrap.h: Do not document implementation details.
2322         (ref, cref): Group docs with reference_wrapper.
2323         * include/std/fstream: Fix Doxygen markup.
2324         * libsupc++/initializer_list (begin, end): Group docs with
2325         initializer_list.
2326
2327         * doc/doxygen/user.cfg.in: Set MARKDOWN_SUPPORT=YES.
2328
2329         * include/bits/unique_lock.h: Fix/improve doxygen markup.
2330         * include/std/mutex: Likewise.
2331         * include/std/shared_mutex: Likewise.
2332
2333         * include/bits/fs_dir.h: Fix/improve doxygen markup.
2334         * include/bits/fs_fwd.h: Likewise.
2335         * include/bits/fs_ops.h: Likewise.
2336         * include/bits/fs_path.h: Likewise.
2337         * include/std/filesystem: Likewise.
2338
2339         * include/experimental/bits/net.h: Fix/improve doxygen markup.
2340         * include/experimental/buffer: Likewise.
2341         * include/experimental/executor: Likewise.
2342         * include/experimental/internet: Likewise.
2343         * include/experimental/io_context: Likewise.
2344         * include/experimental/net: Likewise.
2345         * include/experimental/netfwd: Likewise.
2346         * include/experimental/socket: Likewise.
2347         * include/experimental/timer: Likewise.
2348
2349         * doc/doxygen/doxygroups.cc: Move description of experimental group
2350         here.
2351         * include/experimental/algorithm: Add to libfund-ts doc group.
2352         * include/experimental/any: Likewise. Do not document implementation
2353         details.
2354         * include/experimental/array: Add to libfund-ts doc group.
2355         * include/experimental/bits/lfts_config.h: Define libfund-ts doc group
2356         for Library Fundamentals.
2357         * include/experimental/chrono: Add to libfund-ts doc group.
2358         * include/experimental/deque: Likewise.
2359         * include/experimental/forward_list: Likewise.
2360         * include/experimental/functional: Likewise.
2361         * include/experimental/iterator: Likewise.
2362         * include/experimental/list: Likewise.
2363         * include/experimental/map: Likewise.
2364         * include/experimental/memory: Likewise.
2365         * include/experimental/memory_resource: Likewise. Improve docs.
2366         details.
2367         * include/experimental/numeric: Add to libfund-ts doc group.
2368         * include/experimental/optional: Likewise.
2369         * include/experimental/propagate_const: Likewise.
2370         * include/experimental/random: Likewise.
2371         * include/experimental/ratio: Likewise.
2372         * include/experimental/regex: Likewise.
2373         * include/experimental/set: Likewise.
2374         * include/experimental/source_location: Likewise.
2375         * include/experimental/string: Likewise.
2376         * include/experimental/string_view: Likewise.
2377         * include/experimental/system_error: Likewise.
2378         * include/experimental/tuple: Likewise.
2379         * include/experimental/type_traits: Likewise.
2380         * include/experimental/unordered_map: Likewise.
2381         * include/experimental/unordered_set: Likewise.
2382         * include/experimental/utility: Likewise.
2383         * include/experimental/vector: Likewise.
2384         * testsuite/experimental/any/misc/any_cast_neg.cc: Adjust dg-error.
2385         * testsuite/experimental/array/neg.cc: Adjust dg-error.
2386         * testsuite/experimental/propagate_const/assignment/move_neg.cc:
2387         Likewise.
2388         * testsuite/experimental/propagate_const/cons/move_neg.cc: Likewise.
2389         * testsuite/experimental/propagate_const/requirements2.cc: Likewise.
2390         * testsuite/experimental/propagate_const/requirements3.cc: Likewise.
2391         * testsuite/experimental/propagate_const/requirements4.cc: Likewise.
2392         * testsuite/experimental/propagate_const/requirements5.cc: Likewise.
2393
2394         * include/experimental/bits/fs_dir.h: Fix Doxygen markup.
2395         * include/experimental/bits/fs_fwd.h: Improve docs.
2396         * include/experimental/bits/fs_ops.h: fix Doxygen markup.
2397         * include/experimental/bits/fs_path.h: Likewise.
2398         (path, filesystem_error, u8path): Improve docs.
2399         * include/experimental/filesystem: Link to docs for TS.
2400
2401         * config/allocator/new_allocator_base.h (__allocator_base): Add
2402         workaround for Doxygen bug #6945.
2403         * include/std/memory: Improve docs. Define group for pointer safety.
2404         * include/std/scoped_allocator: Improve docs. Use "undocumented"
2405         conditional to suppress documentation for implementation details.
2406
2407         * include/bits/specfun.h: Improve docs.
2408         * include/tr1/cmath: Likewise. Fix nesting of preprocessor conditions
2409         and namespaces.
2410
2411         * doc/doxygen/doxygroups.cc (std::tr2, std::__gnu_cxx): Improve docs.
2412         (std::experimental): Add docs.
2413         * doc/doxygen/user.cfg.in (PREDEFINED): Expand macros for __cxx11
2414         namespace to nothing when generating docs.
2415         * include/bits/regex_constants.h (std::regex_constants): Improve docs.
2416         * include/std/chrono (std::chrono): Likewise.
2417         * include/std/functional (std::placeholders): Likewise.
2418         * include/std/thread (std::this_thread): Likewise.
2419
2420         * include/parallel/settings.h: Fix Doxygen markup.
2421
2422         * include/ext/pb_ds/detail/bin_search_tree_/*_imps.hpp: Do not define
2423         anything unless PB_DS_CLASS_C_DEC is defined.
2424         * include/ext/pb_ds/detail/binary_heap_/*_imps.hpp: Likewise.
2425         * include/ext/pb_ds/detail/binomial_heap_/*_imps.hpp: Likewise.
2426         * include/ext/pb_ds/detail/binomial_heap_base_/*_imps.hpp: Likewise.
2427         * include/ext/pb_ds/detail/cc_hash_table_map_/*_imps.hpp: Likewise.
2428         * include/ext/pb_ds/detail/gp_hash_table_map_/*_imps.hpp: Likewise.
2429         * include/ext/pb_ds/detail/hash_fn/*_imp.hpp: Likewise.
2430         * include/ext/pb_ds/detail/left_child_next_sibling_heap_/*_imps.hpp:
2431         Likewise.
2432         * include/ext/pb_ds/detail/list_update_map_/*_imps.hpp: Likewise.
2433         * include/ext/pb_ds/detail/ov_tree_map_/*_imps.hpp: Likewise.
2434         * include/ext/pb_ds/detail/pairing_heap_/*_imps.hpp: Likewise.
2435         * include/ext/pb_ds/detail/pat_trie_/*_imps.hpp: Likewise.
2436         * include/ext/pb_ds/detail/rb_tree_map_/*_imps.hpp: Likewise.
2437         * include/ext/pb_ds/detail/rc_binomial_heap_/*_imps.hpp: Likewise.
2438         * include/ext/pb_ds/detail/resize_policy*_imp.hpp: Likewise.
2439         * include/ext/pb_ds/detail/splay_tree_/*_imps.hpp: Likewise.
2440         * include/ext/pb_ds/detail/thin_heap_/*_imps.hpp: Likewise.
2441         * include/ext/pb_ds/detail/trie_policy*_imp.hpp: Likewise.
2442         * include/ext/pb_ds/detail/unordered_iterator/const_iterator.hpp:
2443         Likewise.
2444         * include/ext/pb_ds/detail/unordered_iterator/iterator.hpp: Likewise.
2445         * include/ext/pb_ds/detail/unordered_iterator/point_const_iterator.hpp:
2446         Likewise.
2447         * include/ext/pb_ds/detail/unordered_iterator/point_iterator.hpp:
2448         Likewise.
2449
2450         * doc/doxygen/user.cfg.in: Regenerate with Doxygen 1.8.14 and set
2451         GROUP_NESTED_COMPOUNDS=YES and SORT_BY_SCOPE_NAME=NO. Add various
2452         _GLIBCXX_xxx macros and __attribute__(X) to PREDEFINED macros that
2453         Doxygen expands.
2454
2455 2019-05-01  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
2456
2457         * config/abi/post/i386-solaris2.10/baseline_symbols.txt: Regenerate.
2458         * config/abi/post/i386-solaris2.10/amd64/baseline_symbols.txt: Likewise.
2459         * config/abi/post/i386-solaris2.11/baseline_symbols.txt: Likewise.
2460         * config/abi/post/i386-solaris2.11/amd64/baseline_symbols.txt: Likewise.
2461         * config/abi/post/sparc-solaris2.10/baseline_symbols.txt: Likewise.
2462         * config/abi/post/sparc-solaris2.10/sparcv9/baseline_symbols.txt:
2463         Likewise.
2464         * config/abi/post/sparc-solaris2.11/baseline_symbols.txt: Likewise.
2465         * config/abi/post/sparc-solaris2.11/sparcv9/baseline_symbols.txt:
2466         Likewise.
2467
2468 2019-05-01  Jonathan Wakely  <jwakely@redhat.com>
2469
2470         PR libstdc++/61761
2471         * include/std/complex (__complex_proj): Return parameter unchanged.
2472         [_GLIBCXX_USE_C99_COMPLEX] (__complex_proj): Change overloads for
2473         floating-point types to take std::complex arguments.
2474         [_GLIBCXX_USE_C99_MATH_TR1] (__complex_proj): Add overloads for
2475         floating-point types.
2476         * testsuite/26_numerics/complex/proj.cc: New test.
2477
2478 2019-04-30  Jakub Jelinek  <jakub@redhat.com>
2479
2480         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Change _Lock_policyE2 exports
2481         to _Lock_policyE[012].
2482         * config/abi/post/riscv64-linux-gnu/baseline_symbols.txt: Update.
2483
2484 2019-04-30  Jonathan Wakely  <jwakely@redhat.com>
2485
2486         * testsuite/27_io/filesystem/path/decompose/root_path.cc: Remove
2487         macros accidentally left in.
2488         * testsuite/27_io/filesystem/path/native/string-char8_t.cc: Remove
2489         unnecessary -lstdc++fs option. Fix test for mingw.
2490         * testsuite/experimental/filesystem/path/native/string-char8_t.cc:
2491         Fix test for mingw.
2492
2493 2019-04-30  Jakub Jelinek  <jakub@redhat.com>
2494
2495         * config/abi/post/riscv64-linux-gnu/baseline_symbols.txt: Update.
2496
2497 2019-04-29  Jonathan Wakely  <jwakely@redhat.com>
2498
2499         * include/bits/stl_algo.h (generate_n): Adjust doxygen comment.
2500
2501         * include/bits/move.h (swap(T&, T&), swap(T (&)[N], T (&)[N])): Use
2502         _GLIBCXX_NOEXCEPT_IF to simplify declarations.
2503
2504         PR libstdc++/71312
2505         * src/c++11/shared_ptr.cc (get_mutex): Align pool mutexes to 64 bytes.
2506
2507         * include/bits/stl_bvector.h (vector<bool>::empty()): Add nodiscard
2508         attribute.
2509
2510         * include/bits/stl_iterator_base_types.h (_Iter_base): Remove unused
2511         class template and partial specialization.
2512
2513         PR libstdc++/87982
2514         * include/bits/stl_algo.h (generate_n): Convert _Size parameter to
2515         an integral type.
2516         * include/bits/stl_algobase.h (__size_to_integer): New overloaded
2517         functions to convert a value to an integral type.
2518         (__fill_n_a, __fill_n_a): Assert that __n is already an integral type.
2519         (fill_n): Convert _Size parameter to an integral type.
2520         * testsuite/25_algorithms/fill_n/87982.cc: New test.
2521         * testsuite/25_algorithms/fill_n/87982_neg.cc: New test.
2522         * testsuite/25_algorithms/fill_n/dr426.cc: New test.
2523         * testsuite/25_algorithms/generate_n/87982.cc: New test.
2524         * testsuite/25_algorithms/generate_n/87982_neg.cc: New test.
2525         * testsuite/25_algorithms/generate_n/dr426.cc: New test.
2526
2527 2019-04-28  Nina Dinka Ranns  <dinka.ranns@gmail.com>
2528
2529         Adding noexcept-specification on tuple constructors (LWG 2899)
2530         * libstdc++-v3/include/std/tuple:
2531         (tuple()): Add noexcept-specification.
2532         (tuple(const _Elements&...)): Likewise
2533         (tuple(_UElements&&...)): Likewise
2534         (tuple(const tuple<_UElements...>&)): Likewise
2535         (tuple(tuple<_UElements...>&&)): Likewise
2536         (tuple(const _T1&, const _T2&)): Likewise
2537         (tuple(_U1&&, _U2&&)): Likewise
2538         (tuple(const tuple<_U1, _U2>&): Likewise
2539         (tuple(tuple<_U1, _U2>&&): Likewise
2540         (tuple(const pair<_U1, _U2>&): Likewise
2541         (tuple(pair<_U1, _U2>&&): Likewise
2542         * libstdc++-v3/testsuite/20_util/tuple/cons/noexcept_specs.cc: New
2543
2544 2019-04-27  Marc Glisse  <marc.glisse@inria.fr>
2545
2546         PR libstdc++/87106
2547         * include/bits/stl_uninitialized.h (__relocate_object_a): Mark the
2548         arguments with __restrict.
2549
2550 2019-04-26  H.J. Lu  <hongjiu.lu@intel.com>
2551
2552         * config/abi/post/x86_64-linux-gnu/x32/baseline_symbols.txt: Updated.
2553
2554 2019-04-26  Jonathan Wakely  <jwakely@redhat.com>
2555
2556         * include/experimental/bits/fs_path.h
2557         (path::_S_convert_loc<_InputIterator>): Create const std::string to
2558         avoid redundant call to _S_convert_loc with non-const pointers.
2559
2560         * testsuite/20_util/variant/run.cc: Use a new Hashable type to test
2561         hashing, because pmr::string depends on _GLIBCXX_USE_CXX11_ABI==1.
2562         * testsuite/21_strings/basic_string/hash/hash.cc
2563         [!_GLIBCXX_USE_CXX11_ABI]: Don't test pmr strings.
2564         * testsuite/21_strings/basic_string/hash/hash_char8_t.cc
2565         [!_GLIBCXX_USE_CXX11_ABI]: Likewise.
2566
2567         * config/abi/pre/gnu.ver (GLIBCXX_3.4): Replace wildcard that matches
2568         wstring::_M_replace_dispatch with more specific patterns.
2569         * include/bits/fs_path.h (path::_S_convert_loc<_InputIterator>):
2570         Create const std::string to avoid redundant call to _S_convert_loc
2571         with non-const pointers.
2572         * include/bits/locale_conv.h (__do_str_codecvt): Use if-constexpr to
2573         avoid unnecessary basic_string::assign instantiations.
2574
2575         * include/std/memory (__uses_alloc_args): Add string-literal to
2576         static_assert, to match the one in __uses_alloc.
2577         [__cpp_concepts] (_Std_pair): Use C++2a syntax for concept.
2578         * testsuite/20_util/polymorphic_allocator/construct_c++2a.cc: Check
2579         for recursive uses-allocator construction of nested pairs.
2580         * testsuite/20_util/scoped_allocator/construct_pair_c++2a.cc:: Add
2581         comment.
2582
2583 2019-04-26  Jakub Jelinek  <jakub@redhat.com>
2584
2585         * config/abi/post/s390x-linux-gnu/32/baseline_symbols.txt: Update.
2586         * config/abi/post/s390-linux-gnu/baseline_symbols.txt: Update.
2587         * config/abi/post/powerpc-linux-gnu/baseline_symbols.txt: Update.
2588         * config/abi/post/powerpc64-linux-gnu/32/baseline_symbols.txt: Update.
2589
2590         * config/abi/post/x86_64-linux-gnu/baseline_symbols.txt: Update.
2591         * config/abi/post/x86_64-linux-gnu/32/baseline_symbols.txt: Update.
2592         * config/abi/post/i386-linux-gnu/baseline_symbols.txt: Update.
2593         * config/abi/post/i486-linux-gnu/baseline_symbols.txt: Update.
2594         * config/abi/post/aarch64-linux-gnu/baseline_symbols.txt: Update.
2595         * config/abi/post/s390x-linux-gnu/baseline_symbols.txt: Update.
2596         * config/abi/post/powerpc64-linux-gnu/baseline_symbols.txt: Update.
2597
2598 2019-04-25  Jonathan Wakely  <jwakely@redhat.com>
2599
2600         PR libstdc++/90239
2601         * doc/xml/manual/status_cxx2020.xml: Amend P0591R4 status.
2602         * include/std/scoped_allocator [__cplusplus > 201703L]
2603         (scoped_allocator_adaptor::construct): Define in terms of
2604         uses_allocator_construction_args, as per P0591R4.
2605         * testsuite/20_util/scoped_allocator/construct_pair_c++2a.cc: New test.
2606         * testsuite/util/testsuite_allocator.h: Remove name of unused
2607         parameter.
2608
2609 2019-04-24  Jonathan Wakely  <jwakely@redhat.com>
2610
2611         * doc/xml/manual/status_cxx2017.xml: Document P0024R2 status.
2612         * doc/html/*: Regenerate.
2613
2614         * include/bits/fs_path.h (operator<, operator<=, operator>)
2615         (operator>=, operator==, operator!=): Make hidden friends, as per
2616         LWG 3065.
2617         * testsuite/27_io/filesystem/path/native/string-char8_t.cc: Fix
2618         string type in test.
2619         * testsuite/27_io/filesystem/path/native/string.cc: Likewise.
2620
2621         * include/std/any (any::any(ValueType&&)): Use __and_v.
2622         * include/std/numeric (midpoint(T, T, T), midpoint(T*, T*, T*)):
2623         Likewise.
2624
2625         * include/std/tuple (apply): Use remove_reference_t instead of decay_t
2626         as per P0777R1.
2627         * include/std/type_traits (__result_of_memfun): Use remove_reference
2628         instead of __remove_cvref_t and remove redundant is_same check.
2629         (__inv_unwrap): Use __remove_cvref_t instead of decay_t.
2630
2631         * include/experimental/string_view (basic_string_view::pointer)
2632         (basic_string_view::reference): Fix to refer to non-const value_type.
2633         * include/bits/basic_string.h (basic_string): Use __sv_check and
2634         __sv_limit instead of basic_string_view::_M_check and
2635         basic_string_view::_M_limit.
2636         * include/std/string_view (__sv_check, __sv_limit): New
2637         helper functions to replace basic_string_view::_M_check and
2638         basic_string_view::_M_limit.
2639         (basic_string_view): Add static assertions to enforce ill-formed
2640         requirement for traits_type::char_type from P1148R0, and to enforce
2641         required properties of char-like types.
2642         (basic_string_view::pointer, basic_string_view::reference): Fix to
2643         refer to non-const value_type.
2644         (basic_string_view::operator[], basic_string_view::at)
2645         (basic_string_view::front, basic_string_view::back)
2646         (basic_string_view::data): Use const_reference and const_pointer
2647         typedefs for return types.
2648         (basic_string_view::_M_check, basic_string_view::_M_limit): Remove.
2649         (hash<wstring_view>): Fix argument_type typedef.
2650         * testsuite/21_strings/basic_string_view/modifiers/remove_prefix/
2651         char/1.cc: Fix expected return type of basic_string_view::data().
2652         * testsuite/21_strings/basic_string_view/modifiers/remove_prefix/
2653         wchar_t/1.cc: Likewise.
2654         * testsuite/21_strings/basic_string_view/modifiers/remove_suffix/
2655         char/1.cc: Likewise.
2656         * testsuite/21_strings/basic_string_view/modifiers/remove_suffix/
2657         wchar_t/1.cc: Likewise.
2658         * testsuite/21_strings/basic_string_view/requirements/traits_neg.cc:
2659         New test.
2660         * testsuite/21_strings/basic_string_view/requirements/typedefs.cc:
2661         Check reference and pointer typedefs.
2662         * testsuite/experimental/string_view/requirements/typedefs.cc:
2663         Likewise.
2664         * testsuite/experimental/string_view/modifiers/remove_prefix/char/1.cc:
2665         Fix expected return type of basic_string_view::data().
2666         * testsuite/experimental/string_view/modifiers/remove_prefix/wchar_t/
2667         1.cc: Likewise.
2668         * testsuite/experimental/string_view/modifiers/remove_suffix/char/1.cc:
2669         Likewise.
2670         * testsuite/experimental/string_view/modifiers/remove_suffix/wchar_t/
2671         1.cc: Likewise.
2672
2673         PR libstdc++/90220
2674         * include/std/any (__any_caster): Use remove_cv_t instead of decay_t.
2675         Avoid a runtime check for types that can never be stored in std::any.
2676         * testsuite/20_util/any/misc/any_cast.cc: Test std::any_cast with
2677         array types.
2678
2679         PR libstdc++/90220 (partial)
2680         * include/std/any (any_cast<T>(any*), any_cast<T>(const any*)): Do
2681         not attempt ill-formed static_cast to pointers to non-object types.
2682         * testsuite/20_util/any/misc/any_cast.cc: Test std::any_cast with
2683         function types.
2684
2685         * testsuite/20_util/variant/run.cc: Catch exception by reference to
2686         prevent -Wcatch-value warning.
2687
2688         * include/std/variant (__variant_construct): Use template parameter
2689         type instead of equivalent decltype-specifier.
2690         (_Move_ctor_base<false, Types...>::_Move_ctor_base(_Move_ctor_base&&)):
2691         Replace forward with move.
2692         (_Move_ctor_base<false, Types...>::_M_destructive_move)
2693         (_Move_ctor_base<false, Types...>::_M_destructive_copy)
2694         (_Move_ctor_base<true, Types...>::_M_destructive_move)
2695         (_Move_ctor_base<true, Types...>::_M_destructive_copy): Only set the
2696         index after construction succeeds.
2697         (_Copy_assign_base<false, Types...>::operator=): Remove redundant
2698         if-constexpr checks that are always true. Use __remove_cvref_t instead
2699         of remove_reference so that is_nothrow_move_constructible check
2700         doesn't use a const rvalue parameter. In the potentially-throwing case
2701         construct a temporary and move assign it, as per LWG 2904.
2702         (_Move_assign_base<false, Types...>::operator=): Remove redundant
2703         if-constexpr checks that are always true. Use emplace as per LWG 2904.
2704         (variant::operator=(T&&)): Only use emplace conditionally, otherwise
2705         construct a temporary and move assign from it, as per LWG 2904.
2706         * testsuite/20_util/variant/exception_safety.cc: Check that
2707         assignment operators have strong exception safety guarantee.
2708
2709 2019-04-23  Thomas Rodgers <trodgers@redhat.com>
2710
2711         Document PSTL linker flags
2712
2713         * doc/xml/manual/using.xml: Add PSTL linker flags to table 3.1.
2714
2715 2019-04-23  Jonathan Wakely  <jwakely@redhat.com>
2716
2717         * include/std/variant (__detail::__variant::_Traits): Make
2718         _S_trivial_copy_assign depend on _S_trivial_copy_ctor and make
2719         _S_trivial_move_assign depend on _S_trivial_move_ctor, as per
2720         P0602R4.
2721         (__detail::__variant::_Copy_assign_alias): Only depend on
2722         _S_trivial_copy_assign, which subsumes _S_trivial_copy_ctor now.
2723         * testsuite/20_util/variant/compile.cc: Correct checks for trivial
2724         move assignment operators.
2725
2726         PR libstdc++/90165
2727         * include/std/variant (variant::__not_self): New helper for the
2728         is_same_v<remove_cvref_t<T>, variant>==false constraints.
2729         (variant::__to_type_impl): Remove.
2730         (variant::__to_type): Add default argument to check pack size, instead
2731         of using __to_type_impl.
2732         (variant::__accepted_type): Add default argument using __not_self.
2733         (variant::__is_in_place_tag, variant::__not_in_place_tag): New helpers
2734         for variant(T&&) constructor constraint.
2735         (variant::variant(T&&)): Use __not_in_place_tag in constraints.
2736         Extract __accepted_type into a named template parameter for reuse in
2737         other constraints and in the exception specification.
2738         (variant::variant(in_place_type_t<T>, Args&&...))
2739         (variant::variant(in_place_type_t<T>, initializer_list<U>, Args&&...))
2740         (variant::variant(in_place_index_t<T>, Args&&...))
2741         (variant::variant(in_place_index_t<T>, initializer_list<U>, Args&&...))
2742         (variant::operator=T&&)): Remove redundant && from trait arguments.
2743         * testsuite/20_util/variant/compile.cc: Check variant(T&&) constructor
2744         isn't used for in_place_type or in_place_index arguments.
2745
2746         * include/std/type_traits (unwrap_reference_t): Define for C++2a.
2747         (unwrap_ref_decay): Remove inheritance from unwrap_reference.
2748         * testsuite/20_util/unwrap_reference/1.cc: Adjust test to use alias.
2749
2750 2019-04-23  Ramana Radhakrishnan  <ramana.radhakrishnan@arm.com>
2751             Bernd Edlinger  <bernd.edlinger@hotmail.de>
2752             Jakub Jelinek  <jakub@redhat.com>
2753
2754         PR target/89093
2755         * libsupc++/eh_personality.cc (PERSONALITY_FUNCTION): Add
2756         general-regs-only target attribute for ARM.
2757
2758 2019-04-23  Jonathan Wakely  <jwakely@redhat.com>
2759
2760         PR libstdc++/87431
2761         * include/bits/basic_string.h (_Never_valueless_alt): Make partial
2762         specialization also depend on is_nothrow_move_constructible.
2763         * include/std/variant (__detail::__variant::__never_valueless()):
2764         Only true if the variant would have a move assignment operator.
2765         (__detail::__variant::_Variant_storage<false, T...>::_M_valid()):
2766         Check __never_valueless<T...>().
2767         (variant::emplace): Only perform non-throwing move assignments
2768         for never-valueless alternatives if the variant has a move assignment
2769         operator.
2770         * testsuite/20_util/variant/compile.cc: Check that never-valueless
2771         types can be emplaced into non-assignable variants.
2772         * testsuite/20_util/variant/run.cc: Check that never-valueless types
2773         don't get copied when emplaced into non-assignable variants.
2774
2775         * include/std/variant (__detail::__variant::__ref_cast): Remove
2776         unused function.
2777         (__detail::__variant::_Uninitialized::_M_get)
2778         (__detail::__variant::__get)
2779         (__gen_vtable_impl::__element_by_index_or_cookie): Add noexcept.
2780
2781 2019-04-21  Iain Sandoe  <iain@sandoe.co.uk>
2782
2783         * testsuite/17_intro/headers/c++1998/charset.cc: Skip for Darwin8
2784         to Darwin10.
2785         * testsuite/17_intro/headers/c++2011/charset.cc: Likewise.
2786         * testsuite/17_intro/headers/c++2014/charset.cc: Likewise.
2787         * testsuite/17_intro/headers/c++2017/charset.cc: Likewise.
2788         * testsuite/17_intro/headers/c++2020/charset.cc: Likewise.
2789
2790 2019-04-20  Thomas Rodgers <trodgers@redhat.com>
2791
2792         Delegate PSTL configuration to pstl/pstl_config.h
2793
2794         * include/bits/c++config: Remove explicit PSTL configuration
2795         macros and use definitions from <pstl/pstl_config.h>.
2796
2797 2019-04-20  Thomas Rodgers <trodgers@redhat.com>
2798
2799         Cleanup algorithm implementations
2800         * include/pstl/glue_algorithm_impl.h (stable_sort): Forward
2801         execution policy.
2802         (mismatch): Forward execution policy.
2803         (equal): Qualify call to std::equal().
2804         (partial_sort): Forward execution policy.
2805         (inplace_merge): Forward execution policy.
2806
2807 2019-04-19  Thomas Rodgers <trodgers@redhat.com>
2808
2809         Improve implementation of parallel equal()
2810         * include/pstl/algorithm_impl.h
2811         (__internal::__brick_equal): use "4 iterator" version of
2812         std::equal().
2813         (__internal::__brick_equal): use simd for random access
2814         iterators on unsequenced execution policies.
2815         (__internal::__pattern_equal): add "4 iterator" version
2816         (__internal::__pattern_equal): dispatch to simd __brick_equal
2817         for vector-only execution policies.
2818         (__internal::__pattern_equal): dispatch to __parallel_or for
2819         parallel execution policies.
2820         * include/pstl/glue_algorithm_impl.h
2821         (std::equal): dispatch to "4 iterator" version of
2822         __internal::__pattern_equal().
2823
2824 2019-04-17  Jonathan Wakely  <jwakely@redhat.com>
2825
2826         PR libstdc++/90105
2827         * include/bits/forward_list.h (operator==): Do not use operator!= to
2828         compare elements.
2829         (forward_list<T, A>::sort(Comp)): When elements are equal take the one
2830         earlier in the list, so that sort is stable.
2831         * testsuite/23_containers/forward_list/operations/90105.cc: New test.
2832         * testsuite/23_containers/forward_list/comparable.cc: Test with
2833         types that meet the minimum EqualityComparable and LessThanComparable
2834         requirements. Remove irrelevant comment.
2835
2836         * include/std/variant (__detail::__variant::_Traits::_S_copy_assign):
2837         Do not depend on whether all alternative types are move constructible.
2838         (__detail::__variant::_Copy_assign_base::operator=): Remove cv-quals
2839         from the operand when deciding whether to perform the assignment.
2840         * testsuite/20_util/variant/compile.cc (DeletedMoves): Define type
2841         with deleted move constructor and deleted move assignment operator.
2842         (default_ctor, copy_ctor, move_ctor, copy_assign, move_assign): Check
2843         behaviour of variants with DeletedMoves as an alternative.
2844         * testsuite/20_util/variant/run.cc (DeletedMoves): Define same type.
2845         (move_ctor, move_assign): Check that moving a variant with a
2846         DeletedMoves alternative falls back to copying instead of moving.
2847
2848         * testsuite/20_util/variant/compile.cc: Remove empty string literals
2849         from static_assert declarations.
2850
2851         * testsuite/20_util/variant/compile.cc (MoveCtorOnly): Fix type to
2852         actually match its name.
2853         (MoveCtorAndSwapOnly): Define new type that adds swap to MoveCtorOnly.
2854         (test_swap()): Fix result for MoveCtorOnly and check
2855         MoveCtorAndSwapOnly.
2856
2857         * include/std/optional (optional::value_or(U&&) &&): Add missing
2858         constexpr specifier.
2859         * testsuite/20_util/optional/constexpr/observers/4.cc: Check value_or
2860         for disengaged optionals and rvalue optionals.
2861         * testsuite/20_util/optional/observers/4.cc: Likewise.
2862
2863 2019-04-12  Thomas Rodgers  <trodgers@redhat.com>
2864
2865         * include/pstl/algorithm_impl.h: Uglify identfiers.
2866         * include/pstl/numeric_impl.h:  Uglify identfiers.
2867         * include/pstl/parallel_backend_tbb.h: Uglify identfiers.
2868
2869 2019-04-11  Thomas Rodgers  <trodgers@redhat.com>
2870
2871         * include/bits/c++config:
2872         Add definition for __PSTL_ASSERT.
2873         Add definition for __PSTL_ASSERT_MSG.
2874         * include/pstl/algorithm_impl.h: Replace use of assert().
2875         * include/pstl/numeric_impl.h: Replace use of assert().
2876         * include/pstl/parallel_backend_tbb.h:
2877         Replace use of assert().
2878         Replace use of __TBB_ASSERT().
2879         * include/pstl/parallel_backend_utils.h: Replace use of assert().
2880
2881 2019-04-11  Jonathan Wakely  <jwakely@redhat.com>
2882
2883         PR libstdc++/90046
2884         * src/c++17/memory_resource.cc
2885         (monotonic_buffer_resource::_Chunk::allocate): Increase alignment if
2886         needed to allow placing a _Chunk at the end of the buffer.
2887         (monotonic_buffer_resource::_M_new_buffer): Remove static_assert.
2888
2889 2019-04-10  Jonathan Wakely  <jwakely@redhat.com>
2890
2891         * doc/xml/faq.xml: Add information about emergency EH pool.
2892         * doc/xml/manual/debug.xml: Update list of memory debugging tools.
2893         Move outdated information on mt_allocator to a separate section.
2894         * doc/xml/manual/evolution.xml: Clarify that GLIBCXX_FORCE_NEW
2895         doesn't affect the default allocator.
2896
2897         * testsuite/lib/libstdc++.exp (check_v3_target_parallel_mode): Fix
2898         typo.
2899
2900         PR libstdc++/89851
2901         * testsuite/20_util/variant/89851.cc: New test.
2902
2903 2019-04-09  Jonathan Wakely  <jwakely@redhat.com>
2904
2905         * include/std/variant: Adjust whitespace. Add comments.
2906         (_Multi_array): Leave primary template undefined.
2907         (_Multi_array<_Tp>): Define partial specialization for base case of
2908         recursion.
2909         (__gen_vtable_impl, __gen_vtable): Remove redundant && from type
2910         which is always a reference.
2911         (__gen_vtable::_S_apply()): Remove function, inline body into
2912         default member initializer.
2913         * testsuite/20_util/variant/visit.cc: Test with noncopyable types.
2914
2915         * include/std/variant (__variant_idx_cookie): Add member type.
2916         (__visitor_result_type): Remove.
2917         (__do_visit): Use invoke_result instead of __visitor_result_type.
2918         * testsuite/20_util/variant/visit.cc: New test.
2919
2920         PR libstdc++/90008
2921         * include/std/variant (_VARIANT_RELATION_FUNCTION_TEMPLATE): Remove
2922         unused capture.
2923         * testsuite/20_util/variant/90008.cc: New test.
2924
2925 2019-04-09  Thomas Rodgers  <trodgers@redhat.com>
2926
2927         * include/pstl/algorithm_impl.h: Add namespace qualification.
2928         * include/pstl/execution_defs.h: Add namespace qualification.
2929         * include/pstl/execution_impl.h: Add namespace qualification.
2930         * include/pstl/numeric_impl.h: Add namespace qualification.
2931         * include/pstl/parallel_backend_tbb.h: Add namespace qualification.
2932         * include/pstl/unseq_backend_simd.h: Add namespace qualification.
2933         * include/pstl/parallel_backend_utils.h: Include <cassert>.
2934
2935 2019-04-08  Ville Voutilainen  <ville.voutilainen@gmail.com>
2936
2937         Fix visit<R> for variant.
2938         * include/std/variant (__do_visit): Add a template parameter
2939         for enforcing same return types for visit.
2940         (__gen_vtable_impl): Likewise.
2941         (_S_apply_single_alt): Adjust.
2942         (__visit_invoke_impl): New. Handle casting to void.
2943         (__do_visit_invoke): New. Enforces same return types.
2944         (__do_visit_invoke_r): New. Converts return types.
2945         (__visit_invoke): Adjust.
2946         (__gen_vtable):  Add a template parameter for enforcing
2947         same return types for visit.
2948         * testsuite/20_util/variant/visit_r.cc: Add a test for a visitor with
2949         different return types.
2950         * testsuite/20_util/variant/visit_neg.cc: New. Ensures that
2951         visitors with different return types don't accidentally
2952         compile with regular visitation.
2953
2954 2019-04-08  Christophe Lyon  <christophe.lyon@linaro.org>
2955
2956         * testsuite/27_io/filesystem/iterators/caching.cc: Add
2957         dg-require-filesystem-ts.
2958
2959 2019-04-05  Jonathan Wakely  <jwakely@redhat.com>
2960
2961         * doc/xml/manual/status_cxx2020.xml: Update status.
2962         * include/std/variant (visit<R>): Define for C++2a (P0655R1).
2963         * testsuite/20_util/variant/visit_r.cc: New test.
2964
2965         * include/bits/fs_dir.h (directory_iterator::operator*)
2966         (directory_iterator::operator->): Add noexcept.
2967         (operator==, operator!=): Replace namespace-scope equality operators
2968         for directory iterators with hidden friends.
2969
2970         PR libstdc++/89986
2971         * config/abi/pre/gnu.ver: Add missing exports.
2972         * testsuite/27_io/filesystem/iterators/directory_iterator.cc: Test
2973         increment member.
2974
2975         * config/abi/pre/gnu.ver: Export new symbols.
2976         * include/bits/fs_dir.h (recursive_directory_iterator::options())
2977         (recursive_directory_iterator::recursion_pending())
2978         (recursive_directory_iterator::disable_recursion_pending()): Remove
2979         inline definitions. Make noexcept.
2980         (recursive_directory_iterator::depth())
2981         (recursive_directory_iterator::operator*())
2982         (recursive_directory_iterator::operator->()): Make noexcept.
2983         (recursive_directory_iterator::_M_options)
2984         (recursive_directory_iterator::_M_pending): Remove data members.
2985         * src/c++17/fs_path.cc (_Dir_stack): Add constructor and data members.
2986         (recursive_directory_iterator::recursive_directory_iterator): Remove
2987         ctor-initializer. Use new constructor for _Dir_stack.
2988         (recursive_directory_iterator::options())
2989         (recursive_directory_iterator::recursion_pending())
2990         (recursive_directory_iterator::disable_recursion_pending()): Add
2991         non-inline definitions.
2992         (recursive_directory_iterator::depth()): Make noexcept.
2993         (recursive_directory_iterator::increment(error_code&))
2994         (recursive_directory_iterator::pop(error_code&)): Adjust to new
2995         location of options and recursion_pending members.
2996         * testsuite/27_io/filesystem/iterators/recursion_pending.cc: New test.
2997         * testsuite/util/testsuite_fs.h (__gnu_test::scoped_file): Add
2998         user-declared move constructor and assignment operator, to make the
2999         type move-only.
3000
3001         * src/c++17/fs_dir.cc (_Dir::advance(bool, error_code&)): Handle
3002         d_type == DT_UNKNOWN immediately.
3003         (_Dir::should_recurse(bool, error_code&)): Remove file_type::unknown
3004         handling here.
3005         * testsuite/27_io/filesystem/iterators/caching.cc: New test.
3006
3007         * include/bits/fs_path.h (path::operator=(path&&)): Check for self
3008         assignment.
3009         * src/c++17/fs_path.cc (path::operator=(const path&)): Likewise.
3010         * testsuite/27_io/filesystem/path/assign/copy.cc: Test self
3011         assignment.
3012
3013         PR libstdc++/87431 (again)
3014         * include/bits/basic_string.h (__variant::_Never_valueless_alt):
3015         Define partial specialization for basic_string.
3016         * include/bits/shared_ptr.h (_Never_valueless_alt): Likewise for
3017         shared_ptr and weak_ptr.
3018         * include/bits/std_function.h (_Never_valueless_alt): Likewise for
3019         function.
3020         * include/bits/stl_vector.h (_Never_valueless_alt): Likewise for
3021         vector.
3022         * include/bits/unique_ptr.h (_Never_valueless_alt): Likewise for
3023         unique_ptr.
3024         * include/debug/vector (_Never_valueless_alt): Likewise for debug
3025         vector.
3026         * include/std/any (_Never_valueless_alt): Define explicit
3027         specialization for any.
3028         * include/std/variant (_Never_valueless_alt): Define primary template.
3029         (__never_valueless): Use _Never_valueless_alt instead of
3030         is_trivially_copyable.
3031         (variant::emplace<N>(Args&&...)): Add special case for non-throwing
3032         initializations to avoid try-catch overhead. Add special case for
3033         scalars produced by potentially-throwing conversions. Use
3034         _Never_valueless_alt instead of is_trivially_copyable for the
3035         remaining strong exception-safety cases.
3036         (variant::emplace<N>(initializer_list<U>, Args&&...)): Likewise.
3037         * testsuite/20_util/variant/87431.cc: Run both test functions.
3038         * testsuite/20_util/variant/exception_safety.cc: New test.
3039         * testsuite/20_util/variant/run.cc: Use pmr::string instead of string,
3040         so the variant becomes valueless.
3041
3042 2019-04-03  Jonathan Wakely  <jwakely@redhat.com>
3043
3044         PR libstdc++/85184
3045         * include/std/variant (_Copy_assign_base, _Move_assign_base, variant):
3046         Remove assertions.
3047         (variant::emplace<_Tp>): Return result of emplace<N> directly.
3048
3049         * include/std/string (__hash_string_base): New class template defining
3050         operator() for hashing strings.
3051         (hash<pmr::string>, hash<pmr::u8string>, hash<pmr::u16string>)
3052         (hash<pmr::u32string>, hash<pmr::wstring>): Define for C++17.
3053         * testsuite/21_strings/basic_string/hash/hash.cc: New test.
3054         * testsuite/21_strings/basic_string/hash/hash_char8_t.cc: New test.
3055
3056 2019-04-01  Ville Voutilainen  <ville.voutilainen@gmail.com>
3057
3058         Use single-visitation in variant assignment and swap and relops.
3059         Also use indices instead of types when checking whether
3060         variants hold the same thing.
3061         * include/std/variant (__do_visit): Add a template parameter
3062         for index visitation, invoke with indices if index visitation
3063         is used.
3064         (__variant_idx_cookie): New.
3065         (__visit_with_index): Likewise.
3066         (_Copy_assign_base::operator=): Do single-visitation with
3067         an index visitor.
3068         (_Move_assign_base::operator=): Likewise.
3069         (_Extra_visit_slot_needed): Adjust.
3070         (__visit_invoke): Call with indices if it's an index visitor.
3071         (relops): Do single-visitation with an index visitor.
3072         (swap): Likewise.
3073         (__visitor_result_type): New.
3074
3075 2019-03-30  Eric Botcazou  <ebotcazou@adacore.com>
3076
3077         * src/c++17/fs_ops.cc (fs::permissions): Use std::errc::not_supported.
3078
3079 2019-03-28  Ville Voutilainen  <ville.voutilainen@gmail.com>
3080
3081         Don't revisit a variant we are already visiting.
3082         * include/std/variant (__variant_construct_single): New.
3083         (__variant_construct): Use it.
3084         (_M_destructive_move): Likewise.
3085         (_M_destructive_copy): Likewise.
3086         (_Copy_assign_base::operator=): Adjust.
3087         (_Move_assign_base::operator=): Likewise.
3088         (swap): Likewise.
3089
3090 2019-03-26  Jonathan Wakely  <jwakely@redhat.com>
3091
3092         PR libstdc++/85965
3093         * include/bits/hashtable.h (_Hashtable): Move static assertions to
3094         destructor so they are not evaluated until the _Key type is complete.
3095         * include/bits/stl_tree.h (_Rb_tree): Likewise.
3096         * testsuite/23_containers/set/85965.cc: New test.
3097         * testsuite/23_containers/unordered_set/85965.cc: New test.
3098         * testsuite/23_containers/map/48101_neg.cc: Replace "here" errors
3099         with regexp matching the corresponding _Rb_tree specialization.
3100         * testsuite/23_containers/multimap/48101_neg.cc: Likewise.
3101         * testsuite/23_containers/multiset/48101_neg.cc: Remove "here" error.
3102         * testsuite/23_containers/set/48101_neg.cc: Likewise.
3103         * testsuite/23_containers/unordered_map/48101_neg.cc: Likewise.
3104         * testsuite/23_containers/unordered_multimap/48101_neg.cc: Likewise.
3105         * testsuite/23_containers/unordered_multiset/48101_neg.cc: Likewise.
3106         * testsuite/23_containers/unordered_set/48101_neg.cc: Likewise.
3107
3108 2019-03-26  Ville Voutilainen  <ville.voutilainen@gmail.com>
3109
3110         PR libstdc++/89825
3111         Fix based on a suggestion by Antony Polukhin.
3112         * include/std/variant (__never_valueless): New.
3113         (_M_valid): Use it.
3114         (_Extra_visit_slot_needed): New.
3115         (_Multi_array): Use it.
3116         (_S_apply_all_alts): Likewise.
3117
3118 2019-03-26  Ville Voutilainen  <ville.voutilainen@gmail.com>
3119
3120         PR libstdc++/89824
3121         Fix based on a suggestion by Antony Polukhin.
3122         * include/std/variant (__gen_vtable): Don't reserve an
3123         additional table slot, _Multi_array already does that.
3124
3125 2019-03-26  Ville Voutilainen  <ville.voutilainen@gmail.com>
3126
3127         PR libstdc++/89816
3128         Fix based on a suggestion by Antony Polukhin.
3129         * include/std/variant (__variant_construct): Capture a pointer
3130         to the storage and visit just one variant.
3131
3132 2019-03-22  Jonathan Wakely  <jwakely@redhat.com>
3133
3134         * doc/xml/manual/backwards_compatibility.xml: Remove link to
3135         Doxygen-generated pages with unstable URL.
3136         * doc/xml/manual/concurrency_extensions.xml: Likewise.
3137         * doc/xml/manual/extensions.xml: Likewise.
3138         * doc/xml/manual/parallel_mode.xml: Likewise.
3139         * doc/xml/manual/support.xml: Likewise.
3140
3141         * include/bits/stl_algobase.h (__lg): Do arithmetic on type int to
3142         avoid -Wconversion warnings.
3143
3144 2019-03-21  Thomas Rodgers  <trodgers@redhat.com>
3145
3146         * include/Makefile.am (std_header): Add ${std_srcdir}/execution.
3147         (pstl_srcdir, pstl_builddir, pstl_headers): New variables.
3148         (allstamped): Add stamp-pstl.
3149         (install-headers): Add ptsl_builddir.
3150         * include/Makefile.in: Regenerate.
3151         * include/bits/c++config: Add pstl configuration.
3152         * include/pstl/LICENSE.txt: New file.
3153         * include/pstl/algorithm_fwd.h: New file.
3154         * include/pstl/algorithm_impl.h: New file.
3155         * include/pstl/execution_defs.h: New file.
3156         * include/pstl/execution_impl.h: New file.
3157         * include/pstl/glue_algorithm_defs.h: New file.
3158         * include/pstl/glue_algorithm_impl.h: New file.
3159         * include/pstl/glue_execution_defs.h: New file.
3160         * include/pstl/glue_memory_defs.h: New file.
3161         * include/pstl/glue_memory_impl.h: New file.
3162         * include/pstl/glue_numeric_defs.h: New file.
3163         * include/pstl/glue_numeric_impl.h: New file.
3164         * include/pstl/memory_impl.h: New file.
3165         * include/pstl/numeric_fwd.h: New file.
3166         * include/pstl/numeric_impl.h: New file.
3167         * include/pstl/parallel_backend.h: New file.
3168         * include/pstl/parallel_backend_tbb.h: New file.
3169         * include/pstl/parallel_backend_utils.h: New file.
3170         * include/pstl/parallel_impl.h: New file.
3171         * include/pstl/pstl_config.h: New file.
3172         * include/pstl/unseq_backend_simd.h: New file.
3173         * include/pstl/utils.h: New file.
3174         * include/std/algorithm: Include parallel algorithm implementations.
3175         * include/std/execution: New file.
3176         * include/std/memory: Include parallel algorithm implementations.
3177         * include/std/numeric: Include parallel algorithm implementations.
3178         * include/std/version: Add parallel algorithms feature test macro.
3179         * testsuite/util/pstl/pstl_test_config.h: New file.
3180         * testsuite/util/pstl/test_utils.h: New file.
3181         * testsuite/20_util/specialized_algorithms/pstl/uninitialized_construct.cc: New file.
3182         * testsuite/20_util/specialized_algorithms/pstl/uninitialized_copy_move.cc: New file.
3183         * testsuite/20_util/specialized_algorithms/pstl/uninitialized_fill_destroy.cc: New file.
3184         * testsuite/25_algorithms/pstl/alg_merge/inplace_merge.cc: New file.
3185         * testsuite/25_algorithms/pstl/alg_merge/merge.cc: New file.
3186         * testsuite/25_algorithms/pstl/alg_modifying_operations/copy_if.cc: New file.
3187         * testsuite/25_algorithms/pstl/alg_modifying_operations/copy_move.cc: New file.
3188         * testsuite/25_algorithms/pstl/alg_modifying_operations/fill.cc: New file.
3189         * testsuite/25_algorithms/pstl/alg_modifying_operations/generate.cc: New file.
3190         * testsuite/25_algorithms/pstl/alg_modifying_operations/is_partitioned.cc: New file.
3191         * testsuite/25_algorithms/pstl/alg_modifying_operations/partition.cc: New file.
3192         * testsuite/25_algorithms/pstl/alg_modifying_operations/partition_copy.cc: New file.
3193         * testsuite/25_algorithms/pstl/alg_modifying_operations/remove.cc: New file.
3194         * testsuite/25_algorithms/pstl/alg_modifying_operations/remove_copy.cc: New file.
3195         * testsuite/25_algorithms/pstl/alg_modifying_operations/replace.cc: New file.
3196         * testsuite/25_algorithms/pstl/alg_modifying_operations/replace_copy.cc: New file.
3197         * testsuite/25_algorithms/pstl/alg_modifying_operations/rotate.cc: New file.
3198         * testsuite/25_algorithms/pstl/alg_modifying_operations/rotate_copy.cc: New file.
3199         * testsuite/25_algorithms/pstl/alg_modifying_operations/swap_ranges.cc: New file.
3200         * testsuite/25_algorithms/pstl/alg_modifying_operations/transform_binary.cc: New file.
3201         * testsuite/25_algorithms/pstl/alg_modifying_operations/transform_unary.cc: New file.
3202         * testsuite/25_algorithms/pstl/alg_modifying_operations/unique.cc: New file.
3203         * testsuite/25_algorithms/pstl/alg_modifying_operations/unique_copy_equal.cc: New file.
3204         * testsuite/25_algorithms/pstl/alg_nonmodifying/adjacent_find.cc: New file.
3205         * testsuite/25_algorithms/pstl/alg_nonmodifying/all_of.cc: New file.
3206         * testsuite/25_algorithms/pstl/alg_nonmodifying/any_of.cc: New file.
3207         * testsuite/25_algorithms/pstl/alg_nonmodifying/count.cc: New file.
3208         * testsuite/25_algorithms/pstl/alg_nonmodifying/equal.cc: New file.
3209         * testsuite/25_algorithms/pstl/alg_nonmodifying/find.cc: New file.
3210         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_end.cc: New file.
3211         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_first_of.cc: New file.
3212         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_if.cc: New file.
3213         * testsuite/25_algorithms/pstl/alg_nonmodifying/for_each.cc: New file.
3214         * testsuite/25_algorithms/pstl/alg_nonmodifying/mismatch.cc: New file.
3215         * testsuite/25_algorithms/pstl/alg_nonmodifying/none_of.cc: New file.
3216         * testsuite/25_algorithms/pstl/alg_nonmodifying/nth_element.cc: New file.
3217         * testsuite/25_algorithms/pstl/alg_nonmodifying/reverse.cc: New file.
3218         * testsuite/25_algorithms/pstl/alg_nonmodifying/reverse_copy.cc: New file.
3219         * testsuite/25_algorithms/pstl/alg_nonmodifying/search_n.cc: New file.
3220         * testsuite/25_algorithms/pstl/alg_sorting/includes.cc: New file.
3221         * testsuite/25_algorithms/pstl/alg_sorting/is_heap.cc: New file.
3222         * testsuite/25_algorithms/pstl/alg_sorting/is_sorted.cc: New file.
3223         * testsuite/25_algorithms/pstl/alg_sorting/lexicographical_compare.cc: New file.
3224         * testsuite/25_algorithms/pstl/alg_sorting/minmax_element.cc: New file.
3225         * testsuite/25_algorithms/pstl/alg_sorting/partial_sort.cc: New file.
3226         * testsuite/25_algorithms/pstl/alg_sorting/partial_sort_copy.cc: New file.
3227         * testsuite/25_algorithms/pstl/alg_sorting/set.cc: New file.
3228         * testsuite/25_algorithms/pstl/alg_sorting/sort.cc: New file.
3229         * testsuite/26_numerics/pstl/numeric_ops/adjacent_difference.cc: New file.
3230         * testsuite/26_numerics/pstl/numeric_ops/reduce.cc: New file.
3231         * testsuite/26_numerics/pstl/numeric_ops/scan.cc: New file.
3232         * testsuite/26_numerics/pstl/numeric_ops/transform_reduce.cc: New file.
3233         * testsuite/26_numerics/pstl/numeric_ops/transform_scan.cc: New file.
3234         * testsuite/testsuite/20_util/specialized_algorithms/pstl/uninitialized_construct.cc: New file.
3235         * testsuite/testsuite/20_util/specialized_algorithms/pstl/uninitialized_copy_move.cc: New file.
3236         * testsuite/testsuite/20_util/specialized_algorithms/pstl/uninitialized_fill_destroy.cc: New file.
3237         * testsuite/testsuite/25_algorithms/pstl/alg_merge/inplace_merge.cc: New file.
3238         * testsuite/testsuite/25_algorithms/pstl/alg_merge/merge.cc: New file.
3239         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/copy_if.cc: New file.
3240         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/copy_move.cc: New file.
3241         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/fill.cc: New file.
3242         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/generate.cc: New file.
3243         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/is_partitioned.cc: New file.
3244         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/partition.cc: New file.
3245         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/partition_copy.cc: New file.
3246         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/remove.cc: New file.
3247         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/remove_copy.cc: New file.
3248         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/replace.cc: New file.
3249         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/replace_copy.cc: New file.
3250         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/rotate.cc: New file.
3251         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/rotate_copy.cc: New file.
3252         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/swap_ranges.cc: New file.
3253         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/transform_binary.cc: New file.
3254         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/transform_unary.cc: New file.
3255         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/unique.cc: New file.
3256         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/unique_copy_equal.cc: New file.
3257         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/adjacent_find.cc: New file.
3258         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/all_of.cc: New file.
3259         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/any_of.cc: New file.
3260         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/count.cc: New file.
3261         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/equal.cc: New file.
3262         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/find.cc: New file.
3263         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/find_end.cc: New file.
3264         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/find_first_of.cc: New file.
3265         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/find_if.cc: New file.
3266         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/for_each.cc: New file.
3267         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/mismatch.cc: New file.
3268         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/none_of.cc: New file.
3269         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/nth_element.cc: New file.
3270         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/reverse.cc: New file.
3271         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/reverse_copy.cc: New file.
3272         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/search_n.cc: New file.
3273         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/includes.cc: New file.
3274         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/is_heap.cc: New file.
3275         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/is_sorted.cc: New file.
3276         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/lexicographical_compare.cc: New file.
3277         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/minmax_element.cc: New file.
3278         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/partial_sort.cc: New file.
3279         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/partial_sort_copy.cc: New file.
3280         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/set.cc: New file.
3281         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/sort.cc: New file.
3282         * testsuite/testsuite/26_numerics/pstl/numeric_ops/adjacent_difference.cc: New file.
3283         * testsuite/testsuite/26_numerics/pstl/numeric_ops/reduce.cc: New file.
3284         * testsuite/testsuite/26_numerics/pstl/numeric_ops/scan.cc: New file.
3285         * testsuite/testsuite/26_numerics/pstl/numeric_ops/transform_reduce.cc: New file.
3286         * testsuite/testsuite/26_numerics/pstl/numeric_ops/transform_scan.cc: New file.
3287
3288 2019-03-21  Jonathan Wakely  <jwakely@redhat.com>
3289
3290         * include/c_compatibility/math.h [!__STDCPP_WANT_MATH_SPEC_FUNCS__]
3291         (assoc_laguerre, assoc_laguerref, assoc_laguerrel, assoc_legendre)
3292         (assoc_legendref, assoc_legendrel, beta, betaf, betal, comp_ellint_1)
3293         (comp_ellint_1f, comp_ellint_1l, comp_ellint_2, comp_ellint_2f)
3294         (comp_ellint_2l, comp_ellint_3, comp_ellint_3f, comp_ellint_3l)
3295         (cyl_bessel_i, cyl_bessel_if, cyl_bessel_il, cyl_bessel_j)
3296         (cyl_bessel_jf, cyl_bessel_jl, cyl_bessel_k, cyl_bessel_kf)
3297         (cyl_bessel_kl, cyl_neumann, cyl_neumannf, cyl_neumannl, ellint_1)
3298         (ellint_1f, ellint_1l, ellint_2, ellint_2f, ellint_2l, ellint_3)
3299         (ellint_3f, ellint_3l, expint, expintf, expintl, hermite, hermitef)
3300         (hermitel, laguerre, laguerref, laguerrel, legendre, legendref)
3301         (legendrel, riemann_zeta, riemann_zetaf, riemann_zetal, sph_bessel)
3302         (sph_besself, sph_bessell, sph_legendre, sph_legendref, sph_legendrel)
3303         (sph_neumann, sph_neumannf, sph_neumannl): Only add using-declarations
3304         when the special functions IS is enabled, not for C++17.
3305         * testsuite/26_numerics/headers/cmath/functions_global_c++17.cc:
3306         Replace with ...
3307         * testsuite/26_numerics/headers/cmath/functions_global.cc: New test,
3308         without checks for special functions in C++17.
3309         * testsuite/26_numerics/headers/cmath/special_functions_global.cc:
3310         New test.
3311
3312         PR libstdc++/88066
3313         * include/backward/hash_map: Use <> for includes not "".
3314         * include/backward/hash_set: Likewise.
3315         * include/backward/strstream: Likewise.
3316         * include/tr1/bessel_function.tcc: Likewise.
3317         * include/tr1/exp_integral.tcc: Likewise.
3318         * include/tr1/legendre_function.tcc: Likewise.
3319         * include/tr1/modified_bessel_func.tcc: Likewise.
3320         * include/tr1/riemann_zeta.tcc: Likewise.
3321
3322 2019-03-19  Jonathan Wakely  <jwakely@redhat.com>
3323
3324         * doc/xml/manual/allocator.xml: Link to table documenting evolution
3325         of extension allocators.
3326         * doc/xml/manual/evolution.xml: Use angle brackets for header names.
3327         Document new headers in 7.2, 8.1 and 9.1 releases.
3328         * doc/xml/manual/using.xml: Adjust link target for new_allocator.
3329         * doc/html/*: Regenerate.
3330
3331 2019-03-12  John David Anglin  <dave.anglin@bell.net>
3332
3333         PR libstdc++/89461
3334         * testsuite/lib/libstdc++.exp: Locate libatomic.
3335         * testsuite/lib/dg-options.exp (add_options_for_libatomic): New.
3336         * testsuite/20_util/shared_ptr/thread/default_weaktoshared.cc: Add
3337         libatomic options.
3338         * testsuite/20_util/shared_ptr/thread/mutex_weaktoshared.cc: Likewise.
3339         * testsuite/experimental/net/timer/waitable/cons.cc: Likewise.
3340         * testsuite/experimental/net/timer/waitable/dest.cc: Likewise.
3341         * testsuite/experimental/net/timer/waitable/ops.cc: Likewise.
3342
3343 2019-03-11  Jonathan Wakely  <jwakely@redhat.com>
3344
3345         PR libstdc++/89460
3346         * configure.ac: Check for sockatmark.
3347         * crossconfig.m4: Check for sockatmark.
3348         * config.h.in: Regenerate.
3349         * configure: Regenerate.
3350         * include/experimental/internet (address_v4::_S_hton): Rename
3351         overloaded functions to _S_hton_16 and _S_ntoh_16.
3352         (address_v4::_S_ntoh): Rename to _S_ntoh_16 and _S_ntoh_32.
3353         (basic_endpoint): Adjust calls to _S_hton and _S_ntoh.
3354         * include/experimental/socket (basic_socket::at_mark): Check
3355         _GLIBCXX_HAVE_SOCKATMARK.
3356
3357         * testsuite/29_atomics/atomic_flag/test_and_set/explicit-hle.cc: Use
3358         const variables instead of macros.
3359
3360         PR libstdc++/89629
3361         * libsupc++/hash_bytes.cc [__SIZEOF_SIZE_T__ == 8] (_Hash_bytes):
3362         Use correct type for len_aligned.
3363         * testsuite/20_util/hash/89629.cc: New test.
3364
3365 2019-03-11  Jakub Jelinek  <jakub@redhat.com>
3366
3367         PR libstdc++/89641
3368         * include/std/atomic (atomic<T>::store, atomic<T>::load,
3369         atomic<T>::exchange, atomic<T>::compare_exchange_weak,
3370         atomic<T>::compare_exchange_strong): Cast __m or __s and __f to int.
3371         * include/bits/atomic_base.h (__atomic_base<T>::operator++,
3372         __atomic_base<T>::operator--, __atomic_base<T>::operator+=,
3373         __atomic_base<T>::operator-=, __atomic_base<T>::operator&=,
3374         __atomic_base<T>::operator|=, __atomic_base<T>::operator^=,
3375         __atomic_base<T*>::operator++, __atomic_base<T*>::operator--,
3376         __atomic_base<T*>::operator+=, __atomic_base<T*>::operator-=): Cast
3377         memory_order_seq_cst to int.
3378
3379 2019-03-08  Jonathan Wakely  <jwakely@redhat.com>
3380
3381         * doc/xml/manual/using.xml: Use link element instead of xref.
3382         * doc/html/*: Regenerate.
3383
3384         * include/bits/fs_path.h (path::format): Add fixed underlying type.
3385
3386 2019-03-08  François Dumont  <fdumont@gcc.gnu.org>
3387
3388         PR libstdc++/89477
3389         * include/debug/map.h (map): Use _RequireNotAllocator to constrain
3390         parameters in deduction guides.
3391         * include/debug/multimap.h (multimap): Likewise.
3392         * include/debug/set.h (multimap): Likewise.
3393         * include/debug/multiset.h (multimap): Likewise.
3394         * include/debug/unordered_map (unordered_map): Likewise.
3395         (unordered_multimap): Likewise.
3396         * include/debug/unordered_set (unordered_set): Likewise.
3397         (unordered_multiset): Likewise.
3398
3399         PR libstdc++/89608
3400         * include/debug/unordered_map (unordered_map<>::_M_check_rehashed):
3401         Invalidate all iterators in case of rehash.
3402         (unordered_multimap<>::_M_check_rehashed): Likewise.
3403         * include/debug/unordered_set
3404         (unordered_set<>::_M_check_rehashed): Likewise.
3405         (unordered_multiset<>::_M_check_rehashed): Likewise.
3406         * testsuite/23_containers/unordered_set/debug/89608_neg.cc: New.
3407
3408 2019-03-07  Andreas Schwab  <schwab@suse.de>
3409
3410         * config/abi/post/riscv64-linux-gnu: New directory.
3411         * config/abi/post/riscv64-linux-gnu/baseline_symbols.txt: New file.
3412
3413 2019-03-07  Jonathan Wakely  <jwakely@redhat.com>
3414
3415         * testsuite/20_util/function_objects/bind_front/1.cc: Change from
3416         compile test to run. Fix typo.
3417
3418         * doc/xml/manual/status_cxx2020.xml: Update C++20 status.
3419         * doc/html/*: Regenerate.
3420
3421         P0356R5 Simplified partial function application
3422         * include/std/functional [C++20] (_Bind_front, _Bind_front_t): Define
3423         helpers for bind_front.
3424         (bind_front, __cpp_lib_bind_front): Define.
3425         * testsuite/20_util/function_objects/bind_front/1.cc: New test.
3426
3427 2019-03-06  Jonathan Wakely  <jwakely@redhat.com>
3428
3429         * include/std/type_traits (__cpp_lib_bounded_array_traits): Define.
3430         * include/std/version (__cpp_lib_bounded_array_traits): Likewise.
3431         * testsuite/20_util/is_bounded_array/value.cc: Check for macro.
3432         * testsuite/20_util/is_unbounded_array/value.cc: Likewise.
3433
3434 2019-03-06  Edward Smith-Rowland  <3dw4rd@verizon.net>
3435
3436         PR libstdc++/86655 - std::assoc_legendre should not constrain
3437         the value of m (or x).
3438         * include/tr1/legendre_function.tcc (__assoc_legendre_p,
3439         __sph_legendre): If degree > order Don't throw, return 0.
3440         (__legendre_p, __assoc_legendre_p): Don't constrain x either.
3441         * testsuite/special_functions/02_assoc_legendre/pr86655.cc: New test.
3442         * testsuite/special_functions/20_sph_legendre/pr86655.cc: New test.
3443         * testsuite/tr1/5_numerical_facilities/special_functions/
3444         02_assoc_legendre/pr86655.cc: New test.
3445         * testsuite/tr1/5_numerical_facilities/special_functions/
3446         22_sph_legendre/pr86655.cc: New test.
3447
3448 2019-03-06  Ville Voutilainen  <ville.voutilainen@gmail.com>
3449
3450         Rewrite variant.
3451         Also PR libstdc++/85517
3452         * include/std/variant (__do_visit): New.
3453         (__variant_cast): Likewise.
3454         (__variant_cookie): Likewise.
3455         (__erased_*): Remove.
3456         (_Variant_storage::_S_vtable): Likewise.
3457         (_Variant_storage::__M_reset_impl): Adjust to use __do_visit.
3458         (_Variant_storage::__M_reset): Adjust.
3459         (__variant_construct): New.
3460         (_Copy_ctor_base(const _Copy_ctor_base&)): Adjust to use
3461         __variant_construct.
3462         (_Move_ctor_base(_Move_ctor_base&&)): Likewise.
3463         (_Move_ctor_base::__M_destructive_copy): New.
3464         (_Move_ctor_base::__M_destructive_move): Adjust to use
3465         __variant_construct.
3466         (_Copy_assign_base::operator=): Adjust to use __do_visit.
3467         (_Copy_assign_alias): Adjust to check both copy assignment
3468         and copy construction for triviality.
3469         (_Move_assign_base::operator=): Adjust to use __do_visit.
3470         (_Multi_array): Add support for visitors that accept and return
3471         a __variant_cookie.
3472         (__gen_vtable_impl::_S_apply_all_alts): Likewise.
3473         (__gen_vtable_impl::_S_apply_single_alt): Likewise.
3474         (__gen_vtable_impl::__element_by_index_or_cookie): New. Generate
3475         a __variant_cookie temporary for a variant that is valueless and..
3476         (__gen_vtable_impl::__visit_invoke): ..adjust here.
3477         (__gen_vtable::_Array_type): Conditionally make space for
3478         the __variant_cookie visitor case.
3479         (__variant_construct_by_index): New.
3480         (get_if): Adjust to use std::addressof.
3481         (relops): Adjust to use __do_visit.
3482         (variant): Add __variant_cast and __variant_construct_by_index
3483         as friends.
3484         (variant::emplace): Use _M_reset() and __variant_construct_by_index
3485         instead of self-destruction.
3486         (variant::swap): Adjust to use __do_visit.
3487         (visit): Reimplement in terms of __do_visit.
3488         (__variant_hash_call_base_impl::operator()): Adjust to use __do_visit.
3489         * testsuite/20_util/variant/compile.cc: Adjust.
3490         * testsuite/20_util/variant/run.cc: Likewise.
3491
3492 2019-03-06  Jonathan Wakely  <jwakely@redhat.com>
3493
3494         * include/bits/c++config.h (_cpp_lib_char8_t): Add L suffix to
3495         constant.
3496         * testsuite/experimental/feat-char8_t.cc: Likewise.
3497
3498          * include/std/type_traits [C++20] (is_bounded_array)
3499          (is_unbounded_array, is_bounded_array_v, is_unbounded_array_v):
3500          Define.
3501          * testsuite/20_util/is_bounded_array/requirements/
3502          explicit_instantiation.cc: New test.
3503          * testsuite/20_util/is_bounded_array/requirements/typedefs.cc: New
3504          test.
3505          * testsuite/20_util/is_bounded_array/value.cc: New test.
3506          * testsuite/20_util/is_unbounded_array/requirements/
3507          explicit_instantiation.cc: New test.
3508          * testsuite/20_util/is_unbounded_array/requirements/typedefs.cc: New
3509          * test.
3510          * testsuite/20_util/is_unbounded_array/value.cc: New test.
3511
3512         * include/bits/ptr_traits.h [C++20] (pointer_traits<T*>::pointer_to):
3513         Add constexpr.
3514         * testsuite/20_util/pointer_traits/pointer_to_constexpr.cc: New test.
3515
3516 2019-03-05  Jonathan Wakely  <jwakely@redhat.com>
3517
3518         * include/c_compatibility/math.h [C++20] (lerp): Add using
3519         declaration.
3520         * include/c_global/cmath [C++20] (__cpp_lib_interpolate): Define.
3521         (__lerp): Define function template to implement lerp.
3522         (lerp(float, float, float), lerp(double, double, double))
3523         (lerp(long double, long double, long double)): Define for C++20.
3524         * include/std/numeric [C++20] (__cpp_lib_interpolate): Define.
3525         (midpoint(T, T), midpoint(T*, T*)): Define.
3526         * include/std::version [C++20] (__cpp_lib_interpolate): Define.
3527         * testsuite/26_numerics/lerp.cc: New test.
3528         * testsuite/26_numerics/midpoint/floating.cc: New test.
3529         * testsuite/26_numerics/midpoint/integral.cc: New test.
3530         * testsuite/26_numerics/midpoint/pointer.cc: New test.
3531
3532 2019-03-04  Edward Smith-Rowland  <3dw4rd@verizon.net>
3533
3534         PR libstdc++/88996 Implement P0439R0
3535         Make std::memory_order a scoped enumeration.
3536         * include/bits/atomic_base.h: For C++20 make memory_order a scoped enum,
3537         add variables for the old enumerators.  Adjust calls.
3538         * testsuite/29_atomics/headers/atomic/types_std_c++2a.cc: New test.
3539         * testsuite/29_atomics/headers/atomic/types_std_c++2a_neg.cc: New test.
3540
3541 2019-03-04  Jonathan Wakely  <jwakely@redhat.com>
3542
3543         * testsuite/26_numerics/bit/bitops.rot/rotl.cc: Remove bogus dg-do
3544         directive.
3545
3546         * include/std/memory_resource (polymorphic_allocator): Add default
3547         template argument for C++20.
3548         (polymorphic_allocator::allocate_bytes)
3549         (polymorphic_allocator::deallocate_bytes)
3550         (polymorphic_allocator::allocate_object)
3551         (polymorphic_allocator::deallocate_object)
3552         (polymorphic_allocator::new_object)
3553         (polymorphic_allocator::delete_object): New member functions for
3554         C++20.
3555         * testsuite/20_util/polymorphic_allocator/allocate_object.cc: New
3556         test.
3557
3558 2019-03-03  Jonathan Wakely  <jwakely@redhat.com>
3559
3560         PR libstdc++/89562
3561         * src/filesystem/ops-common.h (do_copy_file): Open files in binary
3562         mode for mingw.
3563
3564 2019-03-01  Jonathan Wakely  <jwakely@redhat.com>
3565
3566         * testsuite/util/testsuite_allocator.h (__gnu_test::memory_resource)
3567         [!__cpp_sized_deallocation]: Do not pass size to operator delete.
3568
3569         * include/std/memory (uses_allocator_construction_args): New set of
3570         overloaded functions.
3571         (make_obj_using_allocator, uninitialized_construct_using_allocator):
3572         New functions.
3573         * include/std/memory_resource (polymorphic_allocator::construct)
3574         [__cplusplus > 201703l]: Replace all overloads with a single function
3575         using uses_allocator_construction_args.
3576         * testsuite/20_util/polymorphic_allocator/construct_c++2a.cc: New
3577         test.
3578         * testsuite/20_util/uses_allocator/make_obj.cc: New test.
3579
3580 2019-02-27  Jonathan Wakely  <jwakely@redhat.com>
3581
3582         PR libstdc++/89466
3583         * acinclude.m4 (GLIBCXX_CONFIGURE_DOCBOOK): Reorder check for local
3584         stylesheet directories before check for xsltproc. Try to use
3585         xmlcatalog to find local stylesheet directory before trying hardcoded
3586         paths. Add path used by suse to hardcoded paths. Adjust xsltproc
3587         check to look for the same stylesheet as doc/Makefile.am uses. Don't
3588         use xsltproc if xmlcatalog fails to find a local stylesheet.
3589         * configure.ac: Check for xmlcatalog.
3590         * Makefile.in: Regenerate.
3591         * configure: Likewise.
3592         * doc/Makefile.in: Likewise.
3593         * include/Makefile.in: Likewise.
3594         * libsupc++/Makefile.in: Likewise.
3595         * po/Makefile.in: Likewise.
3596         * python/Makefile.in: Likewise.
3597         * src/Makefile.in: Likewise.
3598         * src/c++11/Makefile.in: Likewise.
3599         * src/c++17/Makefile.in: Likewise.
3600         * src/c++98/Makefile.in: Likewise.
3601         * src/filesystem/Makefile.in: Likewise.
3602         * testsuite/Makefile.in: Likewise.
3603
3604 2019-02-26  Jonathan Wakely  <jwakely@redhat.com>
3605
3606         PR libstdc++/89477
3607         * include/bits/alloc_traits.h (_RequireNotAllocator): New helper for
3608         container deduction guides.
3609         * include/bits/hashtable.h (_RequireNotAllocatorOrIntegral): Likewise.
3610         * include/bits/stl_map.h (map): Use _RequireNotAllocator to constrain
3611         parameters in deduction guides.
3612         * include/bits/stl_multimap.h (multimap): Likewise.
3613         * include/bits/stl_multiset.h (multiset): Likewise.
3614         * include/bits/stl_queue.h (queue, priority_queue): Likewise.
3615         * include/bits/stl_set.h (set): Likewise.
3616         * include/bits/stl_stack.h (stack): Likewise.
3617         * include/bits/unordered_map.h (unordered_map, unordered_multimap):
3618         use _RequireNotAllocator and _RequireNotAllocatorOrIntegral to
3619         constrain parameters in deduction guides.
3620         * include/bits/unordered_set.h (unordered_set, unordered_multiset):
3621         Likewise.
3622         * testsuite/23_containers/map/cons/deduction.cc: Test additional
3623         deduction cases.
3624         * testsuite/23_containers/multiset/cons/deduction.cc: Likewise.
3625         * testsuite/23_containers/set/cons/deduction.cc: Likewise.
3626         * testsuite/23_containers/unordered_map/cons/deduction.cc: Likewise.
3627         * testsuite/23_containers/unordered_multimap/cons/deduction.cc:
3628         Likewise.
3629         * testsuite/23_containers/unordered_multiset/cons/deduction.cc:
3630         Likewise.
3631         * testsuite/23_containers/unordered_set/cons/deduction.cc: Likewise.
3632
3633         PR libstdc++/89416
3634         * include/bits/alloc_traits.h (__is_alloc_insertable_impl): Change
3635         to class template and partial specialization using void_t.
3636         (__is_copy_insertable, __is_move_insertable): Adjust base class.
3637
3638 2019-02-24  Jonathan Wakely  <jwakely@redhat.com>
3639
3640         PR libstdc++/89416
3641         * include/bits/alloc_traits.h (__is_alloc_insertable_impl): Make
3642         copy and move members public.
3643
3644 2019-02-23  Jonathan Wakely  <jwakely@redhat.com>
3645
3646         * include/std/type_traits (__underlying_type_impl): New helper to
3647         make underlying_type SFINAE-friendly.
3648         (underlying_type): Derive from __underlying_type_impl.
3649         * testsuite/20_util/underlying_type/requirements/typedefs-3.cc: New
3650         test.
3651
3652         PR libstdc++/89446
3653         * include/bits/char_traits.h (__constant_char_array): Check index is
3654         in range before dereferencing.
3655         (char_traits<char>::compare, char_traits<char>::find)
3656         (char_traits<char8_t>::compare, char_traits<char8_t>::find): Return
3657         immediately if n is zero.
3658         (char_traits<wchar_t>::compare, char_traits<wchar_t>::find): Likewise.
3659         Remove workarounds for PR 67026.
3660         * testsuite/21_strings/basic_string_view/operators/char/89446.cc:
3661         New test.
3662         * testsuite/21_strings/basic_string_view/operators/wchar_t/89446.cc:
3663         New test.
3664
3665 2019-02-22  Eric Botcazou  <ebotcazou@adacore.com>
3666
3667         * config/abi/post/sparc64-linux-gnu/baseline_symbols.txt: Adjust.
3668         * config/abi/post/sparc64-linux-gnu/32/baseline_symbols.txt: Likewise.
3669
3670 2019-02-22  Jakub Jelinek  <jakub@redhat.com>
3671
3672         PR libstdc++/89402
3673         * src/c++98/compatibility-ldbl.cc (_ZNKSt4hashIeEclEe): Change return
3674         type to std::size_t and argument to type to long double.
3675
3676 2019-02-22  Eric Botcazou  <ebotcazou@adacore.com>
3677
3678         * configure.host (abi_baseline_pair): Adjust for SPARC64/Linux.
3679         * config/abi/post/sparc64-linux-gnu: New directory.
3680         * config/abi/post/sparc64-linux-gnu/baseline_symbols.txt: New file.
3681         * config/abi/post/sparc64-linux-gnu/32: New directory.
3682         * config/abi/post/sparc64-linux-gnu/32/baseline_symbols.txt: New file.
3683
3684 2019-02-21  Jonathan Wakely  <jwakely@redhat.com>
3685
3686         * testsuite/29_atomics/headers/atomic/types_std_c++20.cc: New test.
3687         * testsuite/29_atomics/headers/atomic/types_std_c++20_neg.cc: New
3688         test.
3689
3690 2019-02-22  Tom Honermann  <tom@honermann.net>
3691
3692         * python/libstdcxx/v6/printers.py (register_type_printers): Add type
3693         printers for u8string and u8string_view.
3694
3695 2019-02-22  Tom Honermann  <tom@honermann.net>
3696
3697         * testsuite/18_support/byte/ops.cc: Validate
3698         std::to_integer<char8_t>, std::to_integer<char16_t>, and
3699         std::to_integer<char32_t>.
3700         * testsuite/18_support/numeric_limits/dr559.cc: Validate
3701         std::numeric_limits<char8_t>.
3702         * testsuite/18_support/numeric_limits/lowest.cc: Validate
3703         std::numeric_limits<char8_t>::lowest().
3704         * testsuite/18_support/numeric_limits/max_digits10.cc: Validate
3705         std::numeric_limits<char8_t>::max_digits10.
3706         * testsuite/18_support/type_info/fundamental.cc: Validate
3707         typeinfo for char8_t.
3708         * testsuite/20_util/from_chars/1_c++20_neg.cc: New test, validating
3709         std::from_chars with char8_t.
3710         * testsuite/20_util/hash/requirements/explicit_instantiation.cc:
3711         Validate explicit instantiation of std::hash<char8_t>.
3712         * testsuite/20_util/is_integral/value.cc: Validate
3713         std::is_integral<char8_t>.
3714         * testsuite/20_util/make_signed/requirements/typedefs-4.cc:
3715         Validate std::make_signed<char8_t>.
3716         * testsuite/21_strings/basic_string/cons/char/deduction.cc:
3717         Validate u8string construction from char8_t sources.
3718         * testsuite/21_strings/basic_string/types/pmr_typedefs.cc: Validate
3719         std::pmr::u8string.
3720         * testsuite/21_strings/basic_string_view/operations/compare/
3721         char/70483.cc: Validate substr operations on u8string_view.
3722         * testsuite/21_strings/basic_string_view/typedefs.cc: Validate that
3723         the u8string_view typedef is defined.
3724         * testsuite/21_strings/char_traits/requirements/
3725         constexpr_functions.cc: Validate char_traits<char8_t> constexpr
3726         member functions.
3727         * testsuite/21_strings/char_traits/requirements/
3728         constexpr_functions_c++17.cc: Validate char_traits<char8_t> C++17
3729         constexpr member functions.
3730         * testsuite/21_strings/headers/string/types_std_c++0x.cc: Validate
3731         that the u8string typedef is defined.
3732         * testsuite/22_locale/locale/cons/unicode.cc: Validate the presence
3733         of the std::codecvt<char16_t, char8_t, std::mbstate_t> and
3734         std::codecvt<char32_t, char8_t, std::mbstate_t> facets.
3735         * testsuite/29_atomics/atomic/cons/assign_neg.cc: Update line
3736         numbers.
3737         * testsuite/29_atomics/atomic/cons/copy_neg.cc: Likewise.
3738         * testsuite/29_atomics/atomic_integral/cons/assign_neg.cc:
3739         Likewise.
3740         * testsuite/29_atomics/atomic_integral/cons/copy_neg.cc: Likewise.
3741         * testsuite/29_atomics/atomic_integral/is_always_lock_free.cc:
3742         Validate std::atomic<char8_t>::is_always_lock_free
3743         * testsuite/29_atomics/atomic_integral/operators/bitwise_neg.cc:
3744         Update line numbers.
3745         * testsuite/29_atomics/atomic_integral/operators/decrement_neg.cc:
3746         Likewise.
3747         * testsuite/29_atomics/atomic_integral/operators/increment_neg.cc:
3748         Likewise.
3749         * testsuite/experimental/polymorphic_allocator/pmr_typedefs_string.cc:
3750         Validate std::experimental::pmr::u8string.
3751         * testsuite/experimental/string_view/typedefs.cc: Validate that the
3752         u8string_view typedef is defined.
3753         * testsuite/util/testsuite_common_types.h: Add char8_t, char16_t and
3754         char32_t to the typelists.
3755
3756 2019-02-22  Tom Honermann  <tom@honermann.net>
3757
3758         * include/ext/typelist.h: Constrain a partial specialization of
3759         typelist::detail::append_ to only match chain<T1,T2>.
3760
3761 2019-02-21  Jonathan Wakely  <jwakely@redhat.com>
3762
3763         PR libstdc++/89416
3764         * include/bits/alloc_traits.h (__is_alloc_insertable_impl): Replace
3765         class template with class. Replace move and copy member types with
3766         member alias templates, so they are only instantiated when needed.
3767         (__is_copy_insertable, __is_move_insertable): Adjust base class.
3768         * testsuite/23_containers/vector/modifiers/push_back/89130.cc: Enable
3769         test for C++11/14/17 as well.
3770         * testsuite/23_containers/vector/modifiers/push_back/89416.cc: New
3771         test.
3772
3773 2019-02-20  Jakub Jelinek  <jakub@redhat.com>
3774
3775         PR libstdc++/89402
3776         * src/c++98/compatibility-ldbl.cc (_ZNKSt4hashIeEclEe): Add
3777         _GLIBCXX_PURE to the alias declaration.
3778
3779 2019-02-19  Jonathan Wakely  <jwakely@redhat.com>
3780
3781         * testsuite/21_strings/basic_string/literals/types.cc
3782         [_GLIBCXX_USE_CHAR8_T]: Adjust expected string type for u8 literal.
3783         * testsuite/21_strings/basic_string/literals/values.cc
3784         [_GLIBCXX_USE_CHAR8_T]: Likewise.
3785         * testsuite/22_locale/codecvt/char16_t.cc: Adjust for u8 literals
3786         potentially having different type.
3787         * testsuite/22_locale/codecvt/char32_t.cc: Likewise.
3788         * testsuite/22_locale/codecvt/codecvt_utf8/79980.cc: Cast u8 literal
3789         to char.
3790         * testsuite/22_locale/codecvt/codecvt_utf8/wchar_t/1.cc: Likewise.
3791         * testsuite/22_locale/codecvt/utf8.cc: Likewise.
3792         * testsuite/22_locale/conversions/string/2.cc: Remove u8 prefix from
3793         string literals only using basic character set.
3794         * testsuite/22_locale/conversions/string/3.cc: Likewise. Cast other
3795         u8 literals to char.
3796         * testsuite/29_atomics/headers/atomic/macros.cc [_GLIBCXX_USE_CHAR8_T]:
3797         Test ATOMIC_CHAR8_T_LOCK_FREE.
3798         Add missing #error to ATOMIC_CHAR16_T_LOCK_FREE test.
3799         * testsuite/29_atomics/headers/atomic/types_std_c++0x.cc
3800         [_GLIBCXX_USE_CHAR8_T]: Check for std::atomic_char8_t.
3801         * testsuite/experimental/string_view/literals/types.cc
3802         [_GLIBCXX_USE_CHAR8_T]: Adjust expected string_view type for u8
3803         literal.
3804         * testsuite/experimental/string_view/literals/values.cc
3805         [_GLIBCXX_USE_CHAR8_T]: Likewise.
3806
3807 2019-02-19  Tom Honermann  <tom@honermann.net>
3808
3809         * testsuite/18_support/numeric_limits/char8_t.cc: New test cloned
3810         from char16_32_t.cc; validates numeric_limits<char8_t>.
3811         * testsuite/21_strings/basic_string/literals/types-char8_t.cc: New
3812         test cloned from types.cc; validates operator""s for char8_t
3813         returns u8string.
3814         * testsuite/21_strings/basic_string/literals/values-char8_t.cc: New
3815         test cloned from values.cc; validates construction and comparison
3816         of u8string values.
3817         * testsuite/21_strings/basic_string/requirements/
3818         /explicit_instantiation/char8_t/1.cc: New test cloned from
3819         char16_t/1.cc; validates explicit instantiation of
3820         basic_string<char8_t>.
3821         * testsuite/21_strings/basic_string_view/literals/types-char8_t.cc:
3822         New test cloned from types.cc; validates operator""sv for char8_t
3823         returns u8string_view.
3824         * testsuite/21_strings/basic_string_view/literals/
3825         values-char8_t.cc: New test cloned from values.cc; validates
3826         construction and comparison of u8string_view values.
3827         * testsuite/21_strings/basic_string_view/requirements/
3828         explicit_instantiation/char8_t/1.cc: New test cloned from
3829         char16_t/1.cc; validates explicit instantiation of
3830         basic_string_view<char8_t>.
3831         * testsuite/21_strings/char_traits/requirements/char8_t/65049.cc:
3832         New test cloned from char16_t/65049.cc; validates that
3833         char_traits<char8_t> is not vulnerable to the concerns in PR65049.
3834         * testsuite/21_strings/char_traits/requirements/char8_t/
3835         typedefs.cc: New test cloned from char16_t/typedefs.cc; validates
3836         that char_traits<char8_t> member typedefs are present and correct.
3837         * testsuite/21_strings/char_traits/requirements/
3838         explicit_instantiation/char8_t/1.cc: New test cloned from
3839         char16_t/1.cc; validates explicit instantiation of
3840         char_traits<char8_t>.
3841         * testsuite/22_locale/codecvt/char16_t-char8_t.cc: New test cloned
3842         from char16_t.cc: validates
3843         codecvt<char16_t, char8_t, mbstate_t>.
3844         * testsuite/22_locale/codecvt/char32_t-char8_t.cc: New test cloned
3845         from char32_t.cc: validates
3846         codecvt<char32_t, char8_t, mbstate_t>.
3847         * testsuite/22_locale/codecvt/utf8-char8_t.cc: New test cloned from
3848         utf8.cc; validates codecvt<char16_t, char8_t, std::mbstate_t> and
3849         codecvt<char32_t, char8_t, std::mbstate_t>.
3850         * testsuite/27_io/filesystem/path/native/string-char8_t.cc: New
3851         test cloned from string.cc; validates filesystem::path construction
3852         from char8_t input.
3853         * testsuite/experimental/feat-char8_t.cc: New test; validates that
3854         the __cpp_lib_char8_t feature test macro is defined with the
3855         correct value.
3856         * testsuite/experimental/filesystem/path/native/string-char8_t.cc:
3857         New test cloned from string.cc; validates filesystem::path
3858         construction from char8_t input.
3859         * testsuite/experimental/string_view/literals/types-char8_t.cc: New
3860         test cloned from types.cc; validates operator""sv for char8_t
3861         returns u8string_view.
3862         * testsuite/experimental/string_view/literals/values-char8_t.cc:
3863         New test cloned from values.cc; validates construction and
3864         comparison of u8string_view values.
3865         * testsuite/experimental/string_view/requirements/
3866         explicit_instantiation/char8_t/1.cc: New test cloned from
3867         char16_t/1.cc; validates explicit instantiation of
3868         basic_string_view<char8_t>.
3869         * testsuite/ext/char8_t/atomic-1.cc: New test; validates that
3870         ATOMIC_CHAR8_T_LOCK_FREE is not defined if char8_t support is not
3871         enabled.
3872
3873 2019-02-19  Tom Honermann  <tom@honermann.net>
3874
3875         P0482R5 char8_t: Standard library support
3876         * config/abi/pre/gnu-versioned-namespace.ver (CXXABI_2.0): Add
3877         typeinfo symbols for char8_t.
3878         * config/abi/pre/gnu.ver: Add CXXABI_1.3.12.
3879         (GLIBCXX_3.4.26): Add symbols for specializations of
3880         numeric_limits and codecvt that involve char8_t.
3881         (CXXABI_1.3.12): Add typeinfo symbols for char8_t.
3882         * include/bits/atomic_base.h: Add atomic_char8_t.
3883         * include/bits/basic_string.h: Add std::hash<u8string> and
3884         operator""s(const char8_t*, size_t).
3885         * include/bits/c++config: Define _GLIBCXX_USE_CHAR8_T and
3886         __cpp_lib_char8_t.
3887         * include/bits/char_traits.h: Add char_traits<char8_t>.
3888         * include/bits/codecvt.h: Add
3889         codecvt<char16_t, char8_t, mbstate_t>,
3890         codecvt<char32_t, char8_t, mbstate_t>,
3891         codecvt_byname<char16_t, char8_t, mbstate_t>, and
3892         codecvt_byname<char32_t, char8_t, mbstate_t>.
3893         * include/bits/cpp_type_traits.h: Add __is_integer<char8_t> to
3894         recognize char8_t as an integral type.
3895         * include/bits/fs_path.h: (path::__is_encoded_char): Recognize
3896         char8_t.
3897         (path::u8string): Return std::u8string when char8_t support is
3898         enabled.
3899         (path::generic_u8string): Likewise.
3900         (path::_S_convert): Handle conversion from char8_t input.
3901         (path::_S_str_convert): Likewise.
3902         * include/bits/functional_hash.h: Add hash<char8_t>.
3903         * include/bits/locale_conv.h (__str_codecvt_out): Add overloads for
3904         char8_t.
3905         * include/bits/locale_facets.h (_GLIBCXX_NUM_UNICODE_FACETS): Bump
3906         for new char8_t specializations.
3907         * include/bits/localefwd.h: Add missing declarations of
3908         codecvt<char16_t, char, mbstate_t> and
3909         codecvt<char32_t, char, mbstate_t>.  Add char8_t declarations
3910         codecvt<char16_t, char8_t, mbstate_t> and
3911         codecvt<char32_t, char8_t, mbstate_t>.
3912         * include/bits/postypes.h: Add u8streampos
3913         * include/bits/stringfwd.h: Add declarations of
3914         char_traits<char8_t> and u8string.
3915         * include/c_global/cstddef: Add __byte_operand<char8_t>.
3916         * include/experimental/bits/fs_path.h (path::__is_encoded_char):
3917         Recognize char8_t.
3918         (path::u8string): Return std::u8string when char8_t support is
3919         enabled.
3920         (path::generic_u8string): Likewise.
3921         (path::_S_convert): Handle conversion from char8_t input.
3922         (path::_S_str_convert): Likewise.
3923         * include/experimental/string: Add u8string.
3924         * include/experimental/string_view: Add u8string_view,
3925         hash<experimental::u8string_view>, and
3926         operator""sv(const char8_t*, size_t).
3927         * include/std/atomic: Add atomic<char8_t> and atomic_char8_t.
3928         * include/std/charconv (__is_int_to_chars_type): Recognize char8_t
3929         as a character type.
3930         * include/std/limits: Add numeric_limits<char8_t>.
3931         * include/std/string_view: Add u8string_view,
3932         hash<experimental::u8string_view>, and
3933         operator""sv(const char8_t*, size_t).
3934         * include/std/type_traits: Add __is_integral_helper<char8_t>,
3935         __make_unsigned<char8_t>, and __make_signed<char8_t>.
3936         * libsupc++/atomic_lockfree_defines.h: Define
3937         ATOMIC_CHAR8_T_LOCK_FREE.
3938         * src/c++11/Makefile.am: Compile with -fchar8_t when compiling
3939         codecvt.cc and limits.cc so that char8_t specializations of
3940         numeric_limits and codecvt and emitted.
3941         * src/c++11/Makefile.in: Likewise.
3942         * src/c++11/codecvt.cc: Define members of
3943         codecvt<char16_t, char8_t, mbstate_t>,
3944         codecvt<char32_t, char8_t, mbstate_t>,
3945         codecvt_byname<char16_t, char8_t, mbstate_t>, and
3946         codecvt_byname<char32_t, char8_t, mbstate_t>.
3947         * src/c++11/limits.cc: Define members of
3948         numeric_limits<char8_t>.
3949         * src/c++98/Makefile.am: Compile with -fchar8_t when compiling
3950         locale_init.cc and localename.cc.
3951         * src/c++98/Makefile.in: Likewise.
3952         * src/c++98/locale_init.cc: Add initialization for the
3953         codecvt<char16_t, char8_t, mbstate_t> and
3954         codecvt<char32_t, char8_t, mbstate_t> facets.
3955         * src/c++98/localename.cc: Likewise.
3956         * testsuite/util/testsuite_abi.cc: Validate ABI bump.
3957
3958 2019-02-18  Wilco Dijkstra  <wdijkstr@arm.com>
3959
3960         * 27_io/filesystem/operations/all.cc: Add dg-require-filesystem-ts.
3961         * 27_io/filesystem/operations/resize_file.cc: Likewise.
3962         * 27_io/filesystem/path/generation/normal2.cc: Likewise.
3963
3964 2019-02-14  Jonathan Wakely  <jwakely@redhat.com>
3965
3966         * doc/xml/manual/status_cxx2020.xml: Update P0887R1 status.
3967         * doc/html/*: Regenerate.
3968
3969         * doc/xml/manual/status_cxx2017.xml: Add P0063R3 to status table.
3970         * doc/html/*: Regenerate.
3971
3972         * doc/xml/manual/intro.xml: Document LWG 2586 status.
3973         * include/bits/uses_allocator.h (__uses_alloc): Use const lvalue
3974         allocator type in is_constructible checks.
3975         * testsuite/20_util/scoped_allocator/69293_neg.cc: Adjust dg-error.
3976         * testsuite/20_util/scoped_allocator/dr2586.cc: New test.
3977         * testsuite/20_util/tuple/cons/allocators.cc: Add test using
3978         problematic type from LWG 2586 discussion.
3979         * testsuite/20_util/uses_allocator/69293_neg.cc: Adjust dg-error.
3980         * testsuite/20_util/uses_allocator/cons_neg.cc: Likewise.
3981
3982         * configure.ac: Check for C11 timespec_get function.
3983         * crossconfig.m4 (freebsd, linux, gnu, cygwin, solaris, netbsd)
3984         (openbsd): Likewise
3985         * config.h.in: Regenerate.
3986         * configure: Regenerate.
3987         * include/c_global/ctime (timespec, timespec_get): Add to namespace
3988         std for C++17 and up.
3989
3990         * doc/xml/manual/intro.xml: Document LWG 2537 status.
3991         * include/bits/stl_queue.h
3992         (priority_queue(const Compare&, const Container&, const Alloc&))
3993         (priority_queue(const Compare&, Container&&, const Alloc&)): Call
3994         make_heap.
3995         * testsuite/23_containers/priority_queue/dr2537.cc: New test.
3996
3997         * doc/xml/manual/intro.xml: Document LWG 2566 status.
3998         * include/bits/stl_queue.h (queue, priority_queue): Add static
3999         assertions to enforce LWG 2566 requirement on value_type.
4000         * include/bits/stl_stack.h (stack): Likewise.
4001
4002         PR middle-end/89303
4003         * testsuite/20_util/enable_shared_from_this/89303.cc: New test.
4004
4005         * doc/xml/manual/intro.xml: Document LWG 2735 status.
4006         * include/bits/std_abs.h: Add comment about LWG 2735.
4007         * testsuite/26_numerics/headers/cstdlib/dr2735.cc: New test.
4008
4009 2019-02-13  Jonathan Wakely  <jwakely@redhat.com>
4010
4011         PR libstdc++/89345
4012         * include/std/version [__cpp_impl_destroying_delete]
4013         (__cpp_lib_destroying_delete): Only define for C++2a and later.
4014         * libsupc++/new [__cpp_impl_destroying_delete]
4015         (__cpp_lib_destroying_delete): Likewise.
4016         (destroying_delete_t, destroying_delete): Likewise, but define even
4017         when __cpp_impl_destroying_delete is not defined.
4018         * testsuite/18_support/destroying_delete.cc: New test.
4019
4020 2019-02-11  Jonathan Wakely  <jwakely@redhat.com>
4021
4022         PR libstdc++/89023
4023         * testsuite/17_intro/headers/c++2011/parallel_mode.cc: New test.
4024         * testsuite/17_intro/headers/c++2014/parallel_mode.cc: New test.
4025         * testsuite/17_intro/headers/c++2017/parallel_mode.cc: New test.
4026         * testsuite/28_regex/headers/regex/parallel_mode.cc: Remove.
4027
4028 2019-02-09  Jonathan Wakely  <jwakely@redhat.com>
4029
4030         PR libstdc++/71044
4031         * include/bits/fs_path.h (path::has_root_name)
4032         (path::has_root_directory, path::has_root_path)
4033         (path::has_relative_path, path::has_parent_path)
4034         (path::has_filename, path::has_stem, path::has_extension)
4035         (path::is_absolute, path::is_relative, path::_M_find_extension): Add
4036         noexcept.
4037         * src/c++17/fs_path.cc (path::has_root_name)
4038         (path::has_root_directory, path::has_root_path)
4039         (path::has_relative_path, path::has_parent_path)
4040         (path::has_filename, path::_M_find_extension): Add noexcept.
4041
4042 2019-02-06  Jonathan Wakely  <jwakely@redhat.com>
4043
4044         PR libstdc++/89102 (partial)
4045         * include/std/type_traits (common_type<>): Define.
4046         (common_type<T>): Derive from common_type<T, T>.
4047         * testsuite/20_util/common_type/requirements/explicit_instantiation.cc:
4048         Test zero-length template argument list.
4049         * testsuite/20_util/common_type/requirements/sfinae_friendly_1.cc:
4050         Test additional single argument cases.
4051         * testsuite/20_util/common_type/requirements/sfinae_friendly_2.cc:
4052         Adjust expected error.
4053
4054 2019-02-05  Jonathan Wakely  <jwakely@redhat.com>
4055
4056         PR libstdc++/89128
4057         * include/bits/stl_queue.h (queue, priority_queue): Add deduction
4058         guides.
4059         * include/bits/stl_stack.h (stack): Likewise.
4060         * testsuite/23_containers/priority_queue/deduction.cc: New test.
4061         * testsuite/23_containers/queue/deduction.cc: New test.
4062         * testsuite/23_containers/stack/deduction.cc: New test.
4063
4064         PR libstdc++/89194
4065         * include/std/type_traits (__is_convertible_helper)
4066         (__is_convertible_helper<_From, _To, false>): Revert changes to
4067         support is_nothrow_convertible.
4068         (__is_nt_convertible_helper): New helper.
4069         (is_nothrow_convertible): Use __is_nt_convertible_helper.
4070
4071         * testsuite/23_containers/vector/modifiers/push_back/49836.cc: Restore
4072         use of CopyConsOnlyType, but also test DelAnyAssign for completeness.
4073
4074         PR libstdc++/89130
4075         * include/bits/alloc_traits.h (__is_copy_insertable_impl): Rename to
4076         __is_alloc_insertable_impl. Replace single type member with two
4077         members, one for each of copy and move insertable.
4078         (__is_move_insertable): New trait for internal use.
4079         * include/bits/stl_vector.h (vector::_S_nothrow_relocate(true_type))
4080         (vector::_S_nothrow_relocate(true_type)): New functions to
4081         conditionally check if __relocate_a can throw.
4082         (vector::_S_use_relocate()): Dispatch to _S_nothrow_relocate based
4083         on __is_move_insertable.
4084         (vector::_S_do_relocate): New overloaded functions to conditionally
4085         call __relocate_a.
4086         (vector::_S_relocate): New function that dispatches to _S_do_relocate
4087         based on _S_use_relocate.
4088         * include/bits/vector.tcc (vector::reserve, vector::_M_realloc_insert)
4089         (vector::_M_default_append): Call _S_relocate instead of __relocate_a.
4090         * testsuite/23_containers/vector/modifiers/push_back/89130.cc: New.
4091
4092         PR libstdc++/89090
4093         * include/bits/stl_uninitialized.h (__relocate_a_1): Make unused
4094         parameter unnamed. Add message to static assertion.
4095         * include/bits/vector.tcc (vector::reserve, vector::_M_realloc_insert)
4096         (vector::_M_default_append): Use _GLIBCXX17_CONSTEXPR for if constexpr
4097         in C++11 code.
4098
4099 2019-02-05  Marc Glisse  <marc.glisse@inria.fr>
4100
4101         PR libstdc++/87106
4102         * include/bits/stl_uninitialized.h (__is_trivially_relocatable):
4103         Rename...
4104         (__is_bitwise_relocatable): ... to this.
4105         (__relocate_a_1): Adapt.
4106         * include/bits/stl_deque.h (__is_trivially_relocatable): Rename...
4107         (__is_bitwise_relocatable): ... to this.
4108
4109 2019-01-30  Jonathan Wakely  <jwakely@redhat.com>
4110
4111         PR libstdc++/89117
4112         * src/c++17/fs_path.cc (path::replace_extension): Erase extension from
4113         final component as well as from _M_pathname. Append the dot using
4114         operator+= instead of only to _M_pathname.
4115         (path::_M_find_extension): Reformat slightly.
4116         * testsuite/27_io/filesystem/path/modifiers/replace_extension.cc:
4117         Add more test cases.
4118
4119 2019-01-30  Ulrich Drepper  <drepper@redhat.com>
4120
4121         * doc/xml/manual/status_cxx2020.xml: Update P0600 entry.
4122
4123 2019-01-29  Jonathan Wakely  <jwakely@redhat.com>
4124
4125         * testsuite/26_numerics/headers/complex/synopsis.cc: Remove incorrect
4126         constexpr specifiers from arg and proj.
4127
4128         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Add missing exports for
4129         __shared_ptr instantiations used by gcc4-compatible ABI.
4130
4131         * include/experimental/forward_list (experimental::erase): Qualify
4132         call to erase_if.
4133         * include/experimental/list (experimental::erase): Likewise.
4134         * include/std/forward_list (std::erase): Likewise.
4135         * include/std/list (std::erase): Likewise.
4136
4137         * testsuite/20_util/reference_wrapper/result_type.cc: Disable for
4138         C++2a.
4139         * testsuite/20_util/reference_wrapper/typedefs-2.cc: Likewise.
4140         * testsuite/20_util/reference_wrapper/typedefs-3.cc: Likewise.
4141         * testsuite/20_util/reference_wrapper/typedefs.cc: Likewise.
4142         * testsuite/30_threads/async/54297.cc: Suppress nodiscard warning.
4143         * testsuite/ext/array_allocator/26875.cc: Likewise.
4144         * testsuite/ext/pool_allocator/allocate_chunk.cc: Likewise.
4145         * testsuite/util/replacement_memory_operators.h: Likewise.
4146         * testsuite/util/testsuite_allocator.h: Likewise.
4147
4148         * include/std/memory_resource (__pool_resource::_M_unpooled): Use
4149         normal mode vector, even for debug mode.
4150         * include/std/vector [_GLIBCXX_DEBUG] (_GLIBCXX_STD_C::pmr::vector):
4151         Define alias template for normal mode vector.
4152
4153 2019-01-28  Jonathan Wakely  <jwakely@redhat.com>
4154
4155         PR libstdc++/68737
4156         * config/locale/generic/c_locale.h (__convert_from_v)
4157         [_GLIBCXX_USE_C99_STDIO]: Also check _GLIBCXX_HAVE_BROKEN_VSNPRINTF.
4158         * config/os/hpux/os_defines.h: Define _GLIBCXX_HAVE_BROKEN_VSNPRINTF.
4159         * include/bits/locale_facets.tcc (num_put::_M_insert_float)
4160         [_GLIBCXX_USE_C99_STDIO]: Also check _GLIBCXX_HAVE_BROKEN_VSNPRINTF.
4161
4162 2019-01-24  Jonathan Wakely  <jwakely@redhat.com>
4163
4164         PR libstdc++/88840
4165         * include/bits/stl_vector.h (vector::__use_relocate): Replace static
4166         data member with static member function _S_use_relocate().
4167         * include/bits/vector.tcc (vector::reserve, vector::_M_realloc_insert)
4168         (vector::_M_default_append): Use _S_use_relocate() instead of
4169         __use_relocate.
4170
4171         * testsuite/27_io/filesystem/path/compare/strings.cc: Only compare
4172         sign of results.
4173
4174 2019-01-22  Jonathan Wakely  <jwakely@redhat.com>
4175
4176         PR libstdc++/88740
4177         * testsuite/util/testsuite_hooks.h [stderr] (VERIFY): Use fprintf to
4178         write to stderr instead of using printf.
4179
4180 2019-01-21  Jakub Jelinek  <jakub@redhat.com>
4181
4182         PR libstdc++/86590
4183         * include/bits/char_traits.h (__constant_string_p,
4184         __constant_char_array_p): Use __builtin_is_constant_evaluated if
4185         available.
4186
4187 2019-01-20  Ulrich Drepper  <drepper@redhat.com>
4188
4189         Implement C++20 P0600r1.
4190         * include/backward/hash_map: Add nodiscard attribute to empty.
4191         * include/backward/hash_set: Likewise.
4192         * backward/hashtable.h: Likewise.
4193         * include/bits/basic_string.h: Likewise.
4194         * include/bits/forward_list.h: Likewise.
4195         * include/bits/hashtable.h: Likewise.
4196         * include/bits/regex.h: Likewise.
4197         * include/bits/stl_deque.h: Likewise.
4198         * include/bits/stl_list.h: Likewise.
4199         * include/bits/stl_map.h: Likewise.
4200         * include/bits/stl_multimap.h: Likewise.
4201         * include/bits/stl_multiset.h: Likewise.
4202         * include/bits/stl_queue.h: Likewise.
4203         * include/bits/stl_set.h: Likewise.
4204         * include/bits/stl_stack.h: Likewise.
4205         * include/bits/stl_tree.h: Likewise.
4206         * include/bits/stl_vector.h: Likewise.
4207         * include/bits/unordered_map.h: Likewise.
4208         * include/bits/unordered_set.h: Likewise.
4209         * include/debug/array: Likewise.
4210         * include/experimental/any: Likewise.
4211         * include/experimental/bits/fs_path.h: Likewise.
4212         * include/experimental/internet: Likewise.
4213         * include/experimental/string_view: Likewise.
4214         * include/ext/pb_ds/detail/bin_search_tree_/info_fn_imps.hpp:
4215         Likewise.
4216         * include/ext/pb_ds/detail/binary_heap_/binary_heap_.hpp:
4217         Likewise.
4218         * include/ext/pb_ds/detail/binary_heap_/info_fn_imps.hpp:
4219         Likewise.
4220         * include/ext/pb_ds/detail/cc_hash_table_map_/cc_ht_map_.hpp:
4221         Likewise.
4222         * include/ext/pb_ds/detail/cc_hash_table_map_/info_fn_imps.hpp:
4223         Likewise.
4224         * include/ext/pb_ds/detail/cc_hash_table_map_/size_fn_imps.hpp:
4225         Likewise.
4226         * include/ext/pb_ds/detail/gp_hash_table_map_/gp_ht_map_.hpp:
4227         Likewise.
4228         * include/ext/pb_ds/detail/gp_hash_table_map_/info_fn_imps.hpp:
4229         Likewise.
4230         * include/ext/pb_ds/detail/left_child_next_sibling_heap_/
4231         info_fn_imps.hpp: Likewise.
4232         * include/ext/pb_ds/detail/left_child_next_sibling_heap_/
4233         left_child_next_sibling_heap_.hpp: Likewise.
4234         * include/ext/pb_ds/detail/list_update_map_/info_fn_imps.hpp:
4235         Likewise.
4236         * include/ext/pb_ds/detail/list_update_map_/lu_map_.hpp:
4237         Likewise.
4238         * include/ext/pb_ds/detail/ov_tree_map_/info_fn_imps.hpp:
4239         Likewise.
4240         * include/ext/pb_ds/detail/ov_tree_map_/ov_tree_map_.hp:
4241         Likewise.
4242         * include/ext/pb_ds/detail/pat_trie_/info_fn_imps.hpp:
4243         Likewise.
4244         * include/ext/pb_ds/detail/pat_trie_/pat_trie_.hpp:
4245         Likewise.
4246         * include/ext/pb_ds/detail/rc_binomial_heap_/rc.hpp:
4247         Likewise.
4248         * include/ext/pb_ds/detail/tree_trace_base.hpp: Likewise.
4249         * include/ext/pb_ds/trie_policy.hpp: Likewise.
4250         * include/ext/rope: Likewise.
4251         * include/ext/slist: Likewise.
4252         * include/ext/vstring.h: Likewise.
4253         * include/profile/array: Likewise.
4254         * include/std/array: Likewise.
4255         * include/tr1/array: Likewise.
4256         * include/tr1/hashtable.h: Likewise.
4257         * include/tr1/regex: Likewise.
4258         * include/tr2/dynamic_bitset: Likewise.
4259         * include/bits/alloc_traits.h: Add nodiscard attribute to
4260         allocate.
4261         * include/experimental/memory_resource: Likewise.
4262         * include/ext/alloc_traits.h: Likewise.
4263         * include/ext/array_allocator.h: Likewise.
4264         * include/ext/bitmap_allocator.h: Likewise.
4265         * include/ext/debug_allocator.h: Likewise.
4266         * include/ext/extptr_allocator.h: Likewise.
4267         * include/ext/mt_allocator.h: Likewise.
4268         * include/ext/new_allocator.h: Likewise.
4269         * include/ext/pool_allocator.h: Likewise.
4270         * include/ext/throw_allocator.h: Likewise.
4271         * include/std/scoped_allocator: Likewise.
4272         * libsupc++/eh_alloc.cc: Likewise.
4273         * include/std/future: Add nodiscard attribute to async.
4274         * libsupc++/new: Add nodiscard attribute to new.
4275
4276 2019-01-18  Jonathan Wakely  <jwakely@redhat.com>
4277
4278         PR libstdc++/87514
4279         PR libstdc++/87520
4280         PR libstdc++/88782
4281         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Export new symbol.
4282         * include/bits/shared_ptr.h
4283         (shared_ptr(_Sp_make_shared_tag, const Alloc&, Args&&...))
4284         (allocate_shared): Change to use new tag type.
4285         * include/bits/shared_ptr_base.h (_Sp_make_shared_tag::_S_eq):
4286         Declare new member function.
4287         (_Sp_alloc_shared_tag): Define new type.
4288         (_Sp_counted_ptr_inplace): Declare __shared_count<_Lp> as a friend.
4289         (_Sp_counted_ptr_inplace::_M_get_deleter) [!__cpp_rtti]: Use
4290         _Sp_make_shared_tag::_S_eq to check type_info.
4291         (__shared_count(Ptr, Deleter),__shared_count(Ptr, Deleter, Alloc)):
4292         Constrain to prevent being called with _Sp_alloc_shared_tag.
4293         (__shared_count(_Sp_make_shared_tag, const _Alloc&, Args&&...)):
4294         Replace constructor with ...
4295         (__shared_count(Tp*&, _Sp_alloc_shared_tag<_Alloc>, Args&&...)): Use
4296         reference parameter so address of the new object can be returned to
4297         the caller. Obtain the allocator from the tag type.
4298         (__shared_ptr(_Sp_make_shared_tag, const Alloc&, Args&&...)): Replace
4299         constructor with ...
4300         (__shared_ptr(_Sp_alloc_shared_tag<Alloc>, Args&&...)): Pass _M_ptr
4301         to the __shared_count constructor.
4302         (__allocate_shared): Change to use new tag type.
4303         * src/c++11/shared_ptr.cc (_Sp_make_shared_tag::_S_eq): Define.
4304
4305 2019-01-17  Jonathan Wakely  <jwakely@redhat.com>
4306
4307         * src/c++17/fs_ops.cc
4308         (equivalent(const path&, const path&, error_code&))
4309         [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Use GetFileInformationByHandle to
4310         compare files instead of relying on incomplete info returned by stat.
4311
4312         PR libstdc++/88884
4313         * src/c++17/fs_ops.cc (absolute(const path&, error_code&)): Do nothing
4314         if the path is already absolute.
4315         [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Normalize root-directory.
4316         [!_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Pass error_code to current_path.
4317
4318         PR libstdc++/88881
4319         * src/c++17/fs_ops.cc (canonical(const path&, error_code&))
4320         [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Normalize path, to match behaviour
4321         of filesystem::exists.
4322         (create_directories(const path&, error_code&)): Add assertions.
4323         (status(const path&, error_code&)) [_GLIBCXX_FILESYSTEM_IS_WINDOWS]:
4324         Add workaround for bug in _wstat for paths with trailing slash.
4325         * testsuite/27_io/filesystem/operations/create_directories.cc: Adjust
4326         for expected behaviour on mingw.
4327         * testsuite/experimental/filesystem/operations/create_directories.cc:
4328         Likewise.
4329         * testsuite/27_io/filesystem/operations/temp_directory_path.cc: Use
4330         "TMP" instead of "TMPDIR" and clean environment before each test. Do
4331         not test permissions on mingw targets.
4332
4333 2019-01-16  Jonathan Wakely  <jwakely@redhat.com>
4334
4335         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Add exports for fstream
4336         constructors and open members taking wide strings. Fix patterns for
4337         filesystem::path members to match wstring_view parameters. Add
4338         exports for shared_ptr members used by directory iterators.
4339         * src/c++17/fs_ops.cc (remove(const path&, error_code&)): Clear the
4340         error code parameter if the file doesn't exist.
4341         * src/filesystem/ops.cc (remove(const path&, error_code&)):
4342         Likewise.
4343         * testsuite/27_io/filesystem/operations/canonical.cc: Fix expected
4344         values for mingw targets, where "/" is not an absolute path. Do not
4345         test symlinks on mingw targets.
4346         * testsuite/experimental/filesystem/operations/canonical.cc: Likewise.
4347         * testsuite/27_io/filesystem/operations/copy.cc: Do not test symlinks
4348         on mingw targets.
4349         * testsuite/experimental/filesystem/operations/copy.cc: Likewise.
4350         * testsuite/27_io/filesystem/operations/create_directories.cc: Check
4351         that each component of the path is created.
4352         * testsuite/experimental/filesystem/operations/create_directories.cc:
4353         Likewise.
4354         * testsuite/27_io/filesystem/operations/exists.cc: Do not test
4355         permissions on mingw targets.
4356         * testsuite/experimental/filesystem/operations/exists.cc: Likewise.
4357         * testsuite/27_io/filesystem/operations/is_empty.cc: Likewise.
4358         * testsuite/experimental/filesystem/operations/is_empty.cc: Likewise.
4359         * testsuite/27_io/filesystem/operations/permissions.cc: XFAIL for
4360         mingw targets.
4361         * testsuite/experimental/filesystem/operations/permissions.cc:
4362         Likewise.
4363         * testsuite/27_io/filesystem/operations/remove.cc: Do not test
4364         symlinks or permissions on mingw targets.
4365         * testsuite/experimental/filesystem/operations/remove.cc: Likewise.
4366         * testsuite/27_io/filesystem/operations/remove_all.cc: Do not test
4367         symlinks on mingw targets.
4368         * testsuite/experimental/filesystem/operations/remove_all.cc:
4369         Likewise.
4370         * testsuite/27_io/filesystem/operations/status.cc: Do not test
4371         permissions on mingw targets.
4372         * testsuite/27_io/filesystem/operations/weakly_canonical.cc: Do not
4373         test symlinks on mingw targets.
4374         * testsuite/experimental/filesystem/operations/space.cc: Fix test
4375         for mingw targets.
4376
4377 2019-02-14  Ulrich Drepper  <drepper@redhat.com>
4378
4379         PR libstdc++/88738
4380         Warn about unused comparisons of shared_ptr/unique_ptr
4381         * include/bits/c++config [_GLIBCXX_NODISCARD]: Define.
4382         * include/bits/shared_ptr.h: Use it for operator ==, !=,
4383         <, <=, >, >= for shared_ptr.
4384         * include/bits/unique_ptr.h: Likewise for unique_ptr.
4385
4386 2019-01-15  Jonathan Wakely  <jwakely@redhat.com>
4387
4388         * include/bits/shared_ptr_base.h (__cpp_lib_shared_ptr_arrays): Define
4389         as 201611L, because P0497R0 changes are supported.
4390         * include/std/version (__cpp_lib_shared_ptr_arrays): Likewise.
4391
4392         * include/bits/erase_if.h [__cplusplus > 201703L]
4393         (__cpp_lib_erase_if): Only define for C++2a.
4394         * include/std/iterator [__cplusplus >= 201402L && !_GLIBCXX_DEBUG]
4395         (__cpp_lib_null_iterators): Define.
4396         * include/std/version [__cplusplus >= 201402L && !_GLIBCXX_DEBUG]
4397         (__cpp_lib_null_iterators): Define.
4398         [__cpp_impl_destroying_delete] (__cpp_lib_destroying_delete): Define.
4399
4400         * doc/xml/manual/status_cxx2017.xml: Document P0032R3 and P0307R2
4401         status.
4402         * include/bits/stl_uninitialized.h (__cpp_lib_raw_memory_algorithms):
4403         Define.
4404         * include/std/any (__cpp_lib_any): Define as 201606L, because P0032R3
4405         changes are supported.
4406         * include/std/optional (__cpp_lib_optional): Likewise.
4407         * include/std/variant (__cpp_lib_variant): Likewise.
4408         * include/std/version [!__STRICT_ANSI__]
4409         (__cpp_lib_uncaught_exceptions): Define as long integer.
4410         [__cplusplus >= 201703L] (__cpp_lib_any)
4411         (__cpp_lib_raw_memory_algorithms, __cpp_lib_uncaught_exceptions)
4412         (__cpp_lib_variant): Define for C++17.
4413         [__cplusplus >= 201703L] (__cpp_lib_optional): Update value and define
4414         as long integer.
4415         * libsupc++/exception (__cpp_lib_uncaught_exceptions): Define as long
4416         integer.
4417
4418         * doc/xml/manual/status_cxx2020.xml: Update P1123R0 status.
4419
4420 2019-01-12  Jonathan Wakely  <jwakely@redhat.com>
4421
4422         PR libstdc++/88811
4423         PR libstdc++/83306
4424         * src/filesystem/path.cc: Fix typo. If first path is empty, show []
4425         before second path.
4426         * testsuite/experimental/filesystem/filesystem_error/cons.cc: New
4427         test.
4428
4429 2019-01-11  Jonathan Wakely  <jwakely@redhat.com>
4430
4431         * doc/xml/manual/intro.xml: Include new section.
4432         * doc/xml/manual/status_cxx2017.xml: Document more
4433         implementation-defined properties of the library.
4434         * doc/xml/manual/status_cxx2020.xml: Document C++2a status.
4435         * doc/html/*: Regenerate.
4436
4437         * include/bits/refwrap.h [__cplusplus > 201703L]
4438         (_Refwrap_base_arg1, _Refwrap_base_arg2, _Reference_wrapper_base)
4439         (_Reference_wrapper_base_memfun): Do not define for C++2a.
4440         (reference_wrapper): Do not derive from _Reference_wrapper_base_memfun
4441         for C++2a.
4442         (reference_wrapper::operator()): Add static assertion.
4443         * testsuite/20_util/reference_wrapper/incomplete.cc: New test.
4444
4445         * include/std/chrono (duration_values::zero(), duration_values::min())
4446         (duration_values::max()): Add noexcept.
4447         (duration::zero(), duration::min(), duration::max()): Likewise.
4448         (time_point::zero(), time_point::min(), time_point::max()): Likewise.
4449         * testsuite/20_util/duration/requirements/noexcept.cc: New test.
4450         * testsuite/20_util/time_point/requirements/noexcept.cc: New test.
4451
4452         * include/std/version (__cpp_lib_erase_if): Move to C++20 group.
4453
4454 2019-01-11  Jakub Jelinek  <jakub@redhat.com>
4455
4456         * include/std/type_traits (__cpp_lib_is_constant_evaluated): Define.
4457         * include/std/version (__cpp_lib_is_constant_evaluated): Define.
4458
4459 2019-01-11  Jonathan Wakely  <jwakely@redhat.com>
4460
4461         PR libstdc++/88802
4462         * include/bits/functional_hash.h (hash<nullptr_t>): Define
4463         specialization for C++17 (P0513R0, LWG 2817).
4464         * testsuite/20_util/hash/nullptr.cc: New test.
4465
4466         PR libstdc++/88125
4467         * config/abi/pre/gnu.ver (GLIBCXX_3.4.6): Remove unused duplicate
4468         pattern for std::basic_stringbuf::str().
4469
4470         * config/abi/pre/gnu.ver (GLIBCXX_3.4): Correct recent changes to
4471         basic_ostream::operator<< patterns.
4472
4473 2019-01-10  Jonathan Wakely  <jwakely@redhat.com>
4474
4475         * testsuite/27_io/filesystem/operations/last_write_time.cc: Fix
4476         test failures on targets with 32-bit time_t.
4477
4478         * include/bits/erase_if.h: Define __cpp_lib_erase_if.
4479         * include/std/deque: Likewise.
4480         * include/std/forward_list: Likewise.
4481         * include/std/list: Likewise.
4482         * include/std/string: Likewise.
4483         * include/std/vector: Likewise.
4484         * include/std/version: Likewise.
4485         * testsuite/21_strings/basic_string/erasure.cc: Test macro.
4486         * testsuite/23_containers/deque/erasure.cc: Likewise.
4487         * testsuite/23_containers/forward_list/erasure.cc: Likewise.
4488         * testsuite/23_containers/list/erasure.cc: Likewise.
4489         * testsuite/23_containers/map/erasure.cc: Likewise.
4490         * testsuite/23_containers/set/erasure.cc: Likewise.
4491         * testsuite/23_containers/unordered_map/erasure.cc: Likewise.
4492         * testsuite/23_containers/unordered_set/erasure.cc: Likewise.
4493         * testsuite/23_containers/vector/erasure.cc: Likewise.
4494
4495         * include/experimental/internet [AI_NUMERICSERV]
4496         (resolver_base::numeric_service): Define conditionally.
4497         * testsuite/experimental/net/internet/resolver/base.cc: Test it
4498         conditionally.
4499         * testsuite/experimental/net/internet/resolver/ops/lookup.cc:
4500         Likewise.
4501
4502 2019-01-10  Ville Voutilainen  <ville.voutilainen@gmail.com>
4503             Jonathan Wakely  <jwakely@redhat.com>
4504
4505         Implement LWG 2221
4506         * config/abi/pre/gnu.ver (GLIBCXX_3.4): Tighten patterns.
4507         (GLIBCXX_3.4.26): Add new exports.
4508         * include/Makefile.am: Add ostream-inst.cc. Move string-inst.cc to
4509         correct list of sources.
4510         * include/Makefile.in: Regenerate.
4511         * include/std/ostream (operator<<(nullptr_t)): New member function.
4512         * src/c++17/ostream-inst.cc: New file.
4513         * testsuite/27_io/basic_ostream/inserters_other/char/lwg2221.cc: New
4514         test.
4515
4516 2019-01-10  Jonathan Wakely  <jwakely@redhat.com>
4517
4518         * testsuite/util/testsuite_fs.h (nonexistent_path): Include name
4519         of the source file containing the caller.
4520         * testsuite/27_io/filesystem/iterators/directory_iterator.cc: Remove
4521         directories created by test.
4522         * testsuite/27_io/filesystem/iterators/recursive_directory_iterator.cc:
4523         Likewise.
4524         * testsuite/experimental/filesystem/iterators/directory_iterator.cc:
4525         Likewise.
4526         * testsuite/experimental/filesystem/iterators/
4527         recursive_directory_iterator.cc: Likewise.
4528
4529 2019-01-10  Jakub Jelinek  <jakub@redhat.com>
4530
4531         PR tree-optimization/88775
4532         * include/bits/stl_function.h (greater<_Tp*>::operator(),
4533         less<_Tp*>::operator(), greater_equal<_Tp*>::operator(),
4534         less_equal<_Tp*>::operator()): Use __builtin_is_constant_evaluated
4535         instead of __builtin_constant_p if available.  Don't bother with
4536         the pointer comparison in C++11 and earlier.
4537
4538 2019-01-09  Sandra Loosemore  <sandra@codesourcery.com>
4539
4540         PR other/16615
4541
4542         * include/ext/bitmap_allocator.h: Mechanically replace "can not"
4543         with "cannot".
4544
4545 2019-01-09  Jonathan Wakely  <jwakely@redhat.com>
4546
4547         * testsuite/libstdc++-prettyprinters/cxx17.cc: Fix expected output
4548         for filesystem::path. Give variables more distinctive names.
4549
4550         * include/std/optional (_Optional_payload_base::_M_copy_assign): New
4551         member function to perform non-trivial assignment.
4552         (_Optional_payload_base::_M_move_assign): Likewise.
4553         (_Optional_payload<T, true, false, true>::operator=)
4554         (_Optional_payload<T, true, true, false>::operator=)
4555         (_Optional_payload<T, true, false, false>::operator=): Call
4556         _M_copy_assign and/or _M_move_assign to do non-trivial assignments.
4557
4558         PR libstdc++/88204
4559         * testsuite/26_numerics/complex/operators/more_constexpr.cc: Do not
4560         test std::complex<long double> if long double format is IBM128.
4561         * testsuite/26_numerics/complex/requirements/more_constexpr.cc:
4562         Likewise.
4563
4564 2019-01-08  Jonathan Wakely  <jwakely@redhat.com>
4565
4566         * testsuite/libstdc++-prettyprinters/compat.cc: Test printer support
4567         for old std::unique_ptr layout.
4568         * testsuite/libstdc++-prettyprinters/cxx17.cc: Fix std::variant test
4569         to become valueless. Add filesystem::path tests.
4570
4571         PR libstdc++/87855
4572         * include/std/optional (_Optional_payload_base): New class template
4573         for common code hoisted from _Optional_payload specializations. Use
4574         a template for the union, to allow a partial specialization for
4575         types with non-trivial destructors. Add constructors for in-place
4576         initialization to the union.
4577         (_Optional_payload(bool, const _Optional_payload&)): Use _M_construct
4578         to perform non-trivial copy construction, instead of relying on
4579         non-standard copy elision in a delegating constructor.
4580         (_Optional_payload(bool, _Optional_payload&&)): Likewise for
4581         non-trivial move construction.
4582         (_Optional_payload): Derive from _Optional_payload_base and use it
4583         for everything except the non-trivial assignment operators, which are
4584         defined as needed.
4585         (_Optional_payload<false, C, M>): Derive from the specialization
4586         _Optional_payload<true, false, false> and add a destructor.
4587         (_Optional_base_impl::_M_destruct, _Optional_base_impl::_M_reset):
4588         Forward to corresponding members of _Optional_payload.
4589         (_Optional_base_impl::_M_is_engaged, _Optional_base_impl::_M_get):
4590         Hoist common members from _Optional_base.
4591         (_Optional_base): Make all members and base class public.
4592         (_Optional_base::_M_get, _Optional_base::_M_is_engaged): Move to
4593         _Optional_base_impl.
4594         * python/libstdcxx/v6/printers.py (StdExpOptionalPrinter): Add
4595         support for new std::optional layout.
4596         * testsuite/libstdc++-prettyprinters/compat.cc: New test.
4597
4598         PR libstdc++/88066
4599         * include/bits/locale_conv.h: Use <> for includes not "".
4600         * include/ext/random: Likewise.
4601         * include/ext/vstring.h: Likewise.
4602
4603 2019-01-08  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
4604
4605         * config/abi/pre/gnu.ver (GLIBCXX_3.4): Tighten existing patterns.
4606         (GLIBCXX_3.4.21): Likewise.
4607
4608 2019-01-08  Jonathan Wakely  <jwakely@redhat.com>
4609
4610         PR libstdc++/88749
4611         * src/filesystem/ops.cc (last_write_time): Fix preprocessor condition
4612         to match the one that controls whether utimbuf and utime are declared.
4613
4614 2019-01-07  Jonathan Wakely  <jwakely@redhat.com>
4615
4616         PR libstdc++/87787
4617         * include/bits/char_traits.h (char_traits::move): Do not pass null
4618         pointers to memmove.
4619         * include/bits/locale_facets.h
4620         (ctype<char>::widen(const char*, const char*, char*)): Do not
4621         pass null pointers to memcpy.
4622         (ctype<char>::narrow(const char*, const char*, char, char*)):
4623         Likewise.
4624         (ctype<char>::do_widen(const char*, const char*, char*)):
4625         Likewise.
4626         (ctype<char>::do_narrow(const char*, const char*, char, char*)):
4627         Likewise.
4628
4629         * doc/xml/manual/spine.xml: Update copyright years.
4630         * doc/xml/manual/status_cxx2017.xml: Adjust note about -lstdc++fs.
4631         * doc/xml/manual/using.xml: Remove requirement to link with -lstdc++fs
4632         for C++17 filesystem library.
4633         * doc/html/*: Regenerate.
4634
4635         * acinclude.m4 (GLIBCXX_CHECK_FILESYSTEM_DEPS): Check for truncate.
4636         * config.h.in: Regenerate.
4637         * config/abi/pre/gnu.ver: Order patterns for filesystem operations
4638         alphabetically and add missing entries for copy_symlink,
4639         hard_link_count, rename, and resize_file.
4640         * configure: Regenerate.
4641         * src/c++17/fs_ops.cc (resize_file): Remove #if so posix::truncate is
4642         used unconditionally.
4643         * src/filesystem/ops-common.h (__gnu_posix::truncate)
4644         [!_GLIBCXX_HAVE_TRUNCATE]: Provide fallback definition that only
4645         supports truncating to zero length.
4646         * testsuite/27_io/filesystem/operations/all.cc: New test.
4647         * testsuite/27_io/filesystem/operations/resize_file.cc: New test.
4648
4649 2019-01-06  Jonathan Wakely  <jwakely@redhat.com>
4650
4651         PR libstdc++/86756
4652         * acinclude.m4 (GLIBCXX_CHECK_FILESYSTEM_DEPS): Check for utime and
4653         lstat and define _GLIBCXX_USE_UTIME and _GLIBCXX_USE_LSTAT.
4654         * config.h.in: Regenerate.
4655         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Export symbols for
4656         remaining std::filesystem types and functions.
4657         * configure: Regenerate.
4658         * src/c++17/Makefile.am: Add C++17 filesystem sources.
4659         * src/c++17/Makefile.in: Regenerate.
4660         * src/c++17/cow-fs_dir.cc: Move src/filesystem/cow-std-dir.cc to
4661         here, and change name of included file.
4662         * src/c++17/cow-fs_ops.cc: Move src/filesystem/cow-std-ops.cc to
4663         here, and change name of included file.
4664         * src/c++17/fs_dir.cc: Move src/filesystem/std-dir.cc to here. Change
4665         path to dir-common.h.
4666         * src/c++17/fs_ops.cc: Move src/filesystem/std-ops.cc to here. Change
4667         path to ops-common.h. Disable -Wunused-parameter warnings.
4668         (internal_file_clock): Define unconditionally.
4669         [!_GLIBCXX_HAVE_SYS_STAT_H] (internal_file_clock::from_stat): Do not
4670         define.
4671         (do_copy_file, do_space): Move definitions to ops.common.h.
4672         (copy, file_size, hard_link_count, last_write_time, space): Only
4673         perform operation when _GLIBCXX_HAVE_SYS_STAT_H is defined, otherwise
4674         report an error.
4675         (last_write_time, read_symlink): Remove unused attributes from
4676         parameters.
4677         * src/filesystem/Makefile.am: Remove C++17 filesystem sources.
4678         * src/filesystem/Makefile.in: Regenerate.
4679         * src/filesystem/cow-std-dir.cc: Move to src/c++17/cow-fs_dir.cc.
4680         * src/filesystem/cow-std-ops.cc: Move to src/c++17/cow-fs_ops.cc.
4681         * src/filesystem/std-dir.cc: Move to src/c++17/fs_dir.cc.
4682         * src/filesystem/std-ops.cc: Move to src/c++17/fs_ops.cc.
4683         * src/filesystem/dir-common.h [!_GLIBCXX_HAVE_DIRENT_H]: Define
4684         dummy types and functions instead of using #error.
4685         * src/filesystem/dir.cc [!_GLIBCXX_HAVE_DIRENT_H]: Use #error.
4686         * src/filesystem/ops-common.h [!_GLIBCXX_USE_LSTAT] (lstat): Define
4687         in terms of stat.
4688         [!_GLIBCXX_HAVE_UNISTD_H]: Define dummy types and functions.
4689         (do_copy_file, do_space): Move definitions here from std-ops.cc.
4690         * src/filesystem/ops.cc: Adjust calls to do_copy_file and do_space
4691         to account for new namespace.
4692         * testsuite/27_io/filesystem/directory_entry/86597.cc: Remove
4693         -lstdc++fs from dg-options.
4694         * testsuite/27_io/filesystem/directory_entry/lwg3171.cc: Likewise.
4695         * testsuite/27_io/filesystem/file_status/1.cc: Likewise.
4696         * testsuite/27_io/filesystem/filesystem_error/cons.cc: Likewise.
4697         * testsuite/27_io/filesystem/filesystem_error/copy.cc: Likewise.
4698         * testsuite/27_io/filesystem/iterators/directory_iterator.cc:
4699         Likewise.
4700         * testsuite/27_io/filesystem/iterators/pop.cc: Likewise.
4701         * testsuite/27_io/filesystem/iterators/recursive_directory_iterator.cc:
4702         Likewise.
4703         * testsuite/27_io/filesystem/operations/absolute.cc: Likewise.
4704         * testsuite/27_io/filesystem/operations/canonical.cc: Likewise.
4705         * testsuite/27_io/filesystem/operations/copy.cc: Likewise.
4706         * testsuite/27_io/filesystem/operations/copy_file.cc: Likewise.
4707         * testsuite/27_io/filesystem/operations/create_directories.cc:
4708         Likewise.
4709         * testsuite/27_io/filesystem/operations/create_directory.cc: Likewise.
4710         * testsuite/27_io/filesystem/operations/create_symlink.cc: Likewise.
4711         * testsuite/27_io/filesystem/operations/current_path.cc: Likewise.
4712         * testsuite/27_io/filesystem/operations/equivalent.cc: Likewise.
4713         * testsuite/27_io/filesystem/operations/exists.cc: Likewise.
4714         * testsuite/27_io/filesystem/operations/file_size.cc: Likewise.
4715         * testsuite/27_io/filesystem/operations/is_empty.cc: Likewise.
4716         * testsuite/27_io/filesystem/operations/last_write_time.cc: Likewise.
4717         * testsuite/27_io/filesystem/operations/permissions.cc: Likewise.
4718         * testsuite/27_io/filesystem/operations/proximate.cc: Likewise.
4719         * testsuite/27_io/filesystem/operations/read_symlink.cc: Likewise.
4720         * testsuite/27_io/filesystem/operations/relative.cc: Likewise.
4721         * testsuite/27_io/filesystem/operations/remove.cc: Likewise.
4722         * testsuite/27_io/filesystem/operations/remove_all.cc: Likewise.
4723         * testsuite/27_io/filesystem/operations/space.cc: Likewise.
4724         * testsuite/27_io/filesystem/operations/status.cc: Likewise.
4725         * testsuite/27_io/filesystem/operations/symlink_status.cc: Likewise.
4726         * testsuite/27_io/filesystem/operations/temp_directory_path.cc:
4727         Likewise.
4728         * testsuite/27_io/filesystem/operations/weakly_canonical.cc: Likewise.
4729
4730
4731         PR libstdc++/86756
4732         * config/abi/pre/gnu.ver (GLIBCXX_3.4): Make various patterns for
4733         typeinfo and vtables less greedy.
4734         (GLIBCXX_3.4.26): Export symbols for std::filesystem::path.
4735         * src/c++17/Makefile.am: Add fs_path.cc and cow-fs_path.cc.
4736         * src/c++17/Makefile.in: Regenerate.
4737         * src/c++17/cow-fs_path.cc: Move src/filesystem/cow-std-path.cc to
4738         here, and change name of included file.
4739         * src/c++17/fs_path.cc: Move src/filesystem/std-path.cc to here.
4740         * src/filesystem/Makefile.am: Remove std-path.cc and cow-std-path.cc
4741         from sources.
4742         * src/filesystem/Makefile.in: Regenerate.
4743         * src/filesystem/cow-std-path.cc: Move to src/c++17/cow-fs_path.cc.
4744         * src/filesystem/std-path.cc: Move to src/c++17/fs_path.cc.
4745         * testsuite/27_io/filesystem/path/append/path.cc: Remove -lstdc++fs
4746         from dg-options and remove dg-require-filesystem-ts.
4747         * testsuite/27_io/filesystem/path/append/source.cc: Likewise.
4748         * testsuite/27_io/filesystem/path/assign/assign.cc: Likewise.
4749         * testsuite/27_io/filesystem/path/assign/copy.cc: Likewise.
4750         * testsuite/27_io/filesystem/path/compare/compare.cc: Likewise.
4751         * testsuite/27_io/filesystem/path/compare/lwg2936.cc: Likewise.
4752         * testsuite/27_io/filesystem/path/compare/path.cc: Likewise.
4753         * testsuite/27_io/filesystem/path/compare/strings.cc: Likewise.
4754         * testsuite/27_io/filesystem/path/concat/path.cc: Likewise.
4755         * testsuite/27_io/filesystem/path/concat/strings.cc: Likewise.
4756         * testsuite/27_io/filesystem/path/construct/80762.cc: Likewise.
4757         * testsuite/27_io/filesystem/path/construct/copy.cc: Likewise.
4758         * testsuite/27_io/filesystem/path/construct/default.cc: Likewise.
4759         * testsuite/27_io/filesystem/path/construct/format.cc: Likewise.
4760         * testsuite/27_io/filesystem/path/construct/locale.cc: Likewise.
4761         * testsuite/27_io/filesystem/path/construct/range.cc: Likewise.
4762         * testsuite/27_io/filesystem/path/construct/string_view.cc: Likewise.
4763         * testsuite/27_io/filesystem/path/decompose/extension.cc: Likewise.
4764         * testsuite/27_io/filesystem/path/decompose/filename.cc: Likewise.
4765         * testsuite/27_io/filesystem/path/decompose/parent_path.cc: Likewise.
4766         * testsuite/27_io/filesystem/path/decompose/relative_path.cc: Likewise.
4767         * testsuite/27_io/filesystem/path/decompose/root_directory.cc:
4768         Likewise.
4769         * testsuite/27_io/filesystem/path/decompose/root_name.cc: Likewise.
4770         * testsuite/27_io/filesystem/path/decompose/root_path.cc: Likewise.
4771         * testsuite/27_io/filesystem/path/decompose/stem.cc: Likewise.
4772         * testsuite/27_io/filesystem/path/generation/normal.cc: Likewise.
4773         * testsuite/27_io/filesystem/path/generation/normal2.cc: Likewise.
4774         * testsuite/27_io/filesystem/path/generation/proximate.cc: Likewise.
4775         * testsuite/27_io/filesystem/path/generation/relative.cc: Likewise.
4776         * testsuite/27_io/filesystem/path/generic/generic_string.cc: Likewise.
4777         * testsuite/27_io/filesystem/path/itr/components.cc: Likewise.
4778         * testsuite/27_io/filesystem/path/itr/traversal.cc: Likewise.
4779         * testsuite/27_io/filesystem/path/modifiers/clear.cc: Likewise.
4780         * testsuite/27_io/filesystem/path/modifiers/make_preferred.cc:
4781         Likewise.
4782         * testsuite/27_io/filesystem/path/modifiers/remove_filename.cc:
4783         Likewise.
4784         * testsuite/27_io/filesystem/path/modifiers/replace_extension.cc:
4785         Likewise.
4786         * testsuite/27_io/filesystem/path/modifiers/replace_filename.cc:
4787         Likewise.
4788         * testsuite/27_io/filesystem/path/modifiers/swap.cc: Likewise.
4789         * testsuite/27_io/filesystem/path/native/string.cc: Likewise.
4790         * testsuite/27_io/filesystem/path/nonmember/append.cc: Likewise.
4791         * testsuite/27_io/filesystem/path/nonmember/hash_value.cc: Likewise.
4792         * testsuite/27_io/filesystem/path/query/empty.cc: Likewise.
4793         * testsuite/27_io/filesystem/path/query/has_extension.cc: Likewise.
4794         * testsuite/27_io/filesystem/path/query/has_filename.cc: Likewise.
4795         * testsuite/27_io/filesystem/path/query/has_parent_path.cc: Likewise.
4796         * testsuite/27_io/filesystem/path/query/has_relative_path.cc: Likewise.
4797         * testsuite/27_io/filesystem/path/query/has_root_directory.cc:
4798         Likewise.
4799         * testsuite/27_io/filesystem/path/query/has_root_name.cc: Likewise.
4800         * testsuite/27_io/filesystem/path/query/has_root_path.cc: Likewise.
4801         * testsuite/27_io/filesystem/path/query/has_stem.cc: Likewise.
4802         * testsuite/27_io/filesystem/path/query/is_absolute.cc: Likewise.
4803         * testsuite/27_io/filesystem/path/query/is_relative.cc: Likewise.
4804
4805         PR libstdc++/87431
4806         * include/std/variant (_Variant_storage<true, _Types...>::_M_valid):
4807         Check is_trivially_copyable instead of is_scalar.
4808         (variant::emplace<N, Args>(Args&&...)): If construction of the new
4809         contained value can throw and its type is trivially copyable then
4810         construct into a temporary variant and move from it, to provide the
4811         strong exception safety guarantee.
4812         (variant::emplace<N, U, Args>(initializer_list<U>, Args&&...)):
4813         Likewise.
4814         * testsuite/20_util/variant/87431.cc: New test.
4815         * testsuite/20_util/variant/run.cc: Adjust test so that throwing
4816         conversion causes valueless state.
4817
4818         PR libstdc++/88607
4819         * testsuite/17_intro/headers/c++1998/charset.cc: New test.
4820         * testsuite/17_intro/headers/c++2011/charset.cc: New test.
4821         * testsuite/17_intro/headers/c++2014/charset.cc: New test.
4822         * testsuite/17_intro/headers/c++2017/charset.cc: New test.
4823         * testsuite/17_intro/headers/c++2020/charset.cc: New test.
4824
4825 2019-01-05  Jonathan Wakely  <jwakely@redhat.com>
4826
4827         * include/bits/fs_fwd.h (__file_clock): Define new clock.
4828         (file_time_type): Redefine in terms of __file_clock.
4829         * src/filesystem/ops-common.h (file_time): Add FIXME comment about
4830         overflow.
4831         * src/filesystem/std-ops.cc (is_set(perm_options, perm_options)): Give
4832         internal linkage.
4833         (internal_file_lock): New helper type for accessing __file_clock.
4834         (do_copy_file): Use internal_file_lock to convert system time to
4835         file_time_type.
4836         (last_write_time(const path&, error_code&)): Likewise.
4837         (last_write_time(const path&, file_time_type, error_code&)): Likewise.
4838
4839 2019-01-04  Jonathan Wakely  <jwakely@redhat.com>
4840
4841         * config/abi/pre/gnu.ver (GLIBCXX_3.4.21): Make patterns less greedy
4842         for const member functions of std::basic_string.
4843         (GLIBCXX_3.4.26): Export member functions of std::basic_string added
4844         in C++17.
4845         * include/bits/basic_string.h (basic_string(__sv_wrapper, const A&)):
4846         Make non-standard constructor private.
4847         [!_GLIBCXX_USE_CXX11_ABI] (basic_string(__sv_wrapper, const A&)):
4848         Likewise.
4849         * include/bits/basic_string.tcc (std::string, std::wstring): Declare
4850         explicit instantiations for C++17 as well as earlier dialects.
4851         * src/c++17/Makefile.am: Add new source files.
4852         * src/c++17/Makefile.in: Regenerate.
4853         * src/c++17/cow-string-inst.cc: New file defining explicit
4854         instantiations for basic_string member functions added in C++17.
4855         * src/c++17/string-inst.cc: Likewise.
4856
4857         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Export allocator-extended
4858         copy/move constructors for old std::basic_string.
4859         * include/bits/basic_string.h [!_GLIBCXX_USE_CXX11_ABI]
4860         (basic_string::reference, basic_string::const_reference): Define
4861         as plain references for C++11 and later.
4862         (basic_string::basic_string()): Put constructor body outside
4863         preprocessor conditional groups.
4864         (basic_string::basic_string(basic_string&&)): Move _Alloc_hider
4865         instead of copying it.
4866         (basic_string::basic_string(const basic_string&, const _Alloc&)):
4867         Define.
4868         (basic_string::basic_string(basic_string&&, const _Alloc&)):
4869         Define.
4870         * include/bits/fs_path.h [!_GLIBCXX_USE_CXX11_ABI]: Remove special
4871         cases for old basic_string.
4872         * testsuite/21_strings/basic_string/cons/char/8.cc: Test
4873         allocator-extended constructors unconditionally. Add extra members to
4874         allocator type when using old string ABI.
4875         * testsuite/21_strings/basic_string/allocator/71964.cc: Enable test
4876         for old string ABI.
4877         * testsuite/21_strings/basic_string/cons/wchar_t/8.cc: Likewise.
4878
4879         * testsuite/23_containers/list/61347.cc: Avoid spurious failure when
4880         -fno-inline added to test flags.
4881
4882         * testsuite/21_strings/basic_string/requirements/
4883         explicit_instantiation/debug.cc: Remove XFAIL for old ABI.
4884
4885         * testsuite/27_io/filesystem/filesystem_error/copy.cc: Fix static
4886         assertion failures with old std::string ABI.
4887
4888         * include/bits/fs_path.h (path::_List::erase): Replace both overloads
4889         with ...
4890         (path::pop_back(), path::_M_erase_from(const_iterator)): New member
4891         functions that will only erase elements at the end.
4892         * src/filesystem/std-path.cc (path::_List::_Impl::pop_back()): Define.
4893         (path::_List::_Impl::_M_erase_from(const_iterator)): Define.
4894         (path::_List::operator=(const _List&)): Use _M_erase_from(p) instead
4895         of erase(p, end()).
4896         (path::_List::pop_back()): Define.
4897         (path::_List::_M_erase_from(const_iterator)): Define.
4898         (path::operator/=(const path&)): Use pop_back to remove last component
4899         and _M_erase_from to remove multiple components.
4900         (path::_M_append(basic_string_view<value_type>)): Likewise.
4901         (path::operator+=(const path&)): Likewise.
4902         (path::_M_concat(basic_string_view<value_type>)): Likewise.
4903         (path::remove_filename()): Likewise.
4904         (path::lexically_normal()): Use _List::_Impl iterators instead of
4905         path::iterator. Use pop_back to remove components from the end. Clear
4906         trailing filename, instead of using erase(const_iterator) to remove
4907         a non-final component.
4908         * testsuite/27_io/filesystem/path/generation/normal.cc: Test
4909         additional cases.
4910         * testsuite/27_io/filesystem/path/generation/normal2.cc: New test.
4911
4912         * src/filesystem/std-path.cc (path::operator+=(const path&)): Fix
4913         incorrect treatment of empty filename after trailing slash.
4914         * testsuite/27_io/filesystem/path/concat/path.cc: Test problem case.
4915
4916         * testsuite/21_strings/basic_string/modifiers/assign/char/
4917         move_assign_optim.cc: Avoid spurious failure when -fno-inline added
4918         to test flags.
4919         * testsuite/21_strings/basic_string/modifiers/assign/wchar_t/
4920         move_assign_optim.cc: Likewise.
4921
4922 2019-01-03  Jonathan Wakely  <jwakely@redhat.com>
4923             Jakub Jelinek  <jakub@redhat.com>
4924
4925         PR libstdc++/88607
4926         * include/experimental/memory: Replace UTF-8 quote characters.
4927         * include/std/future: Replace UTF-8 "em dash" characters.
4928
4929 2019-01-03  Jonathan Wakely  <jwakely@redhat.com>
4930
4931         PR libstdc++/88607
4932         * include/bits/forward_list.h: Replace UTF-8 "ligature fi" character.
4933         * include/debug/forward_list: Likewise.
4934         * include/experimental/bits/shared_ptr.h: Remove UTF-8 "section sign"
4935         character.
4936         * include/experimental/chrono: Likewise.
4937         * include/experimental/functional: Likewise.
4938         * include/experimental/ratio: Likewise.
4939         * include/experimental/system_error: Likewise.
4940         * include/experimental/tuple: Likewise.
4941         * include/experimental/type_traits: Likewise.
4942         * include/parallel/workstealing.h: Replace UTF-8 "en dash" character.
4943         * include/parallel/multiseq_selection.h: Likewise.
4944
4945         PR libstdc++/88681
4946         * config/abi/pre/gnu.ver: Add missing exports.
4947         * testsuite/22_locale/collate_byname/88681.cc: New test.
4948         * testsuite/22_locale/time_get/get/char/88681.cc: New test.
4949         * testsuite/22_locale/time_get/get/wchar_t/88681.cc: New test.
4950
4951 2019-01-02  Jonathan Wakely  <jwakely@redhat.com>
4952
4953         * testsuite/23_containers/map/cons/deduction.cc: Test deduction from
4954         initializer_list<value_type> and from input iterator ranges.
4955         * testsuite/23_containers/multimap/cons/deduction.cc: Likewise.
4956
4957         * testsuite/experimental/string_view/element_access/char/empty.cc:
4958         Fix year range in copyright header.
4959
4960 2019-01-02  Joel Brobecker  <brobecker@adacore.com>
4961
4962         * testsuite/21_strings/basic_string_view/element_access/char/empty.cc:
4963         Fix year range in copyright header.
4964
4965 2019-01-01  Jakub Jelinek  <jakub@redhat.com>
4966
4967         Update copyright years.
4968 \f
4969 Copyright (C) 2019 Free Software Foundation, Inc.
4970
4971 Copying and distribution of this file, with or without modification,
4972 are permitted in any medium without royalty provided the copyright
4973 notice and this notice are preserved.