libstdc++-v3/ChangeLog

   1 2019-03-22  Jonathan Wakely  <jwakely@redhat.com>
   2
   3         * doc/xml/manual/backwards_compatibility.xml: Remove link to
   4         Doxygen-generated pages with unstable URL.
   5         * doc/xml/manual/concurrency_extensions.xml: Likewise.
   6         * doc/xml/manual/extensions.xml: Likewise.
   7         * doc/xml/manual/parallel_mode.xml: Likewise.
   8         * doc/xml/manual/support.xml: Likewise.
   9
  10         * include/bits/stl_algobase.h (__lg): Do arithmetic on type int to
  11         avoid -Wconversion warnings.
  12
  13 2019-03-21  Thomas Rodgers  <trodgers@redhat.com>
  14
  15         * include/Makefile.am (std_header): Add ${std_srcdir}/execution.
  16         (pstl_srcdir, pstl_builddir, pstl_headers): New variables.
  17         (allstamped): Add stamp-pstl.
  18         (install-headers): Add ptsl_builddir.
  19         * include/Makefile.in: Regenerate.
  20         * include/bits/c++config: Add pstl configuration.
  21         * include/pstl/LICENSE.txt: New file.
  22         * include/pstl/algorithm_fwd.h: New file.
  23         * include/pstl/algorithm_impl.h: New file.
  24         * include/pstl/execution_defs.h: New file.
  25         * include/pstl/execution_impl.h: New file.
  26         * include/pstl/glue_algorithm_defs.h: New file.
  27         * include/pstl/glue_algorithm_impl.h: New file.
  28         * include/pstl/glue_execution_defs.h: New file.
  29         * include/pstl/glue_memory_defs.h: New file.
  30         * include/pstl/glue_memory_impl.h: New file.
  31         * include/pstl/glue_numeric_defs.h: New file.
  32         * include/pstl/glue_numeric_impl.h: New file.
  33         * include/pstl/memory_impl.h: New file.
  34         * include/pstl/numeric_fwd.h: New file.
  35         * include/pstl/numeric_impl.h: New file.
  36         * include/pstl/parallel_backend.h: New file.
  37         * include/pstl/parallel_backend_tbb.h: New file.
  38         * include/pstl/parallel_backend_utils.h: New file.
  39         * include/pstl/parallel_impl.h: New file.
  40         * include/pstl/pstl_config.h: New file.
  41         * include/pstl/unseq_backend_simd.h: New file.
  42         * include/pstl/utils.h: New file.
  43         * include/std/algorithm: Include parallel algorithm implementations.
  44         * include/std/execution: New file.
  45         * include/std/memory: Include parallel algorithm implementations.
  46         * include/std/numeric: Include parallel algorithm implementations.
  47         * include/std/version: Add parallel algorithms feature test macro.
  48         * testsuite/util/pstl/pstl_test_config.h: New file.
  49         * testsuite/util/pstl/test_utils.h: New file.
  50         * testsuite/20_util/specialized_algorithms/pstl/uninitialized_construct.cc: New file.
  51         * testsuite/20_util/specialized_algorithms/pstl/uninitialized_copy_move.cc: New file.
  52         * testsuite/20_util/specialized_algorithms/pstl/uninitialized_fill_destroy.cc: New file.
  53         * testsuite/25_algorithms/pstl/alg_merge/inplace_merge.cc: New file.
  54         * testsuite/25_algorithms/pstl/alg_merge/merge.cc: New file.
  55         * testsuite/25_algorithms/pstl/alg_modifying_operations/copy_if.cc: New file.
  56         * testsuite/25_algorithms/pstl/alg_modifying_operations/copy_move.cc: New file.
  57         * testsuite/25_algorithms/pstl/alg_modifying_operations/fill.cc: New file.
  58         * testsuite/25_algorithms/pstl/alg_modifying_operations/generate.cc: New file.
  59         * testsuite/25_algorithms/pstl/alg_modifying_operations/is_partitioned.cc: New file.
  60         * testsuite/25_algorithms/pstl/alg_modifying_operations/partition.cc: New file.
  61         * testsuite/25_algorithms/pstl/alg_modifying_operations/partition_copy.cc: New file.
  62         * testsuite/25_algorithms/pstl/alg_modifying_operations/remove.cc: New file.
  63         * testsuite/25_algorithms/pstl/alg_modifying_operations/remove_copy.cc: New file.
  64         * testsuite/25_algorithms/pstl/alg_modifying_operations/replace.cc: New file.
  65         * testsuite/25_algorithms/pstl/alg_modifying_operations/replace_copy.cc: New file.
  66         * testsuite/25_algorithms/pstl/alg_modifying_operations/rotate.cc: New file.
  67         * testsuite/25_algorithms/pstl/alg_modifying_operations/rotate_copy.cc: New file.
  68         * testsuite/25_algorithms/pstl/alg_modifying_operations/swap_ranges.cc: New file.
  69         * testsuite/25_algorithms/pstl/alg_modifying_operations/transform_binary.cc: New file.
  70         * testsuite/25_algorithms/pstl/alg_modifying_operations/transform_unary.cc: New file.
  71         * testsuite/25_algorithms/pstl/alg_modifying_operations/unique.cc: New file.
  72         * testsuite/25_algorithms/pstl/alg_modifying_operations/unique_copy_equal.cc: New file.
  73         * testsuite/25_algorithms/pstl/alg_nonmodifying/adjacent_find.cc: New file.
  74         * testsuite/25_algorithms/pstl/alg_nonmodifying/all_of.cc: New file.
  75         * testsuite/25_algorithms/pstl/alg_nonmodifying/any_of.cc: New file.
  76         * testsuite/25_algorithms/pstl/alg_nonmodifying/count.cc: New file.
  77         * testsuite/25_algorithms/pstl/alg_nonmodifying/equal.cc: New file.
  78         * testsuite/25_algorithms/pstl/alg_nonmodifying/find.cc: New file.
  79         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_end.cc: New file.
  80         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_first_of.cc: New file.
  81         * testsuite/25_algorithms/pstl/alg_nonmodifying/find_if.cc: New file.
  82         * testsuite/25_algorithms/pstl/alg_nonmodifying/for_each.cc: New file.
  83         * testsuite/25_algorithms/pstl/alg_nonmodifying/mismatch.cc: New file.
  84         * testsuite/25_algorithms/pstl/alg_nonmodifying/none_of.cc: New file.
  85         * testsuite/25_algorithms/pstl/alg_nonmodifying/nth_element.cc: New file.
  86         * testsuite/25_algorithms/pstl/alg_nonmodifying/reverse.cc: New file.
  87         * testsuite/25_algorithms/pstl/alg_nonmodifying/reverse_copy.cc: New file.
  88         * testsuite/25_algorithms/pstl/alg_nonmodifying/search_n.cc: New file.
  89         * testsuite/25_algorithms/pstl/alg_sorting/includes.cc: New file.
  90         * testsuite/25_algorithms/pstl/alg_sorting/is_heap.cc: New file.
  91         * testsuite/25_algorithms/pstl/alg_sorting/is_sorted.cc: New file.
  92         * testsuite/25_algorithms/pstl/alg_sorting/lexicographical_compare.cc: New file.
  93         * testsuite/25_algorithms/pstl/alg_sorting/minmax_element.cc: New file.
  94         * testsuite/25_algorithms/pstl/alg_sorting/partial_sort.cc: New file.
  95         * testsuite/25_algorithms/pstl/alg_sorting/partial_sort_copy.cc: New file.
  96         * testsuite/25_algorithms/pstl/alg_sorting/set.cc: New file.
  97         * testsuite/25_algorithms/pstl/alg_sorting/sort.cc: New file.
  98         * testsuite/26_numerics/pstl/numeric_ops/adjacent_difference.cc: New file.
  99         * testsuite/26_numerics/pstl/numeric_ops/reduce.cc: New file.
 100         * testsuite/26_numerics/pstl/numeric_ops/scan.cc: New file.
 101         * testsuite/26_numerics/pstl/numeric_ops/transform_reduce.cc: New file.
 102         * testsuite/26_numerics/pstl/numeric_ops/transform_scan.cc: New file.
 103         * testsuite/testsuite/20_util/specialized_algorithms/pstl/uninitialized_construct.cc: New file.
 104         * testsuite/testsuite/20_util/specialized_algorithms/pstl/uninitialized_copy_move.cc: New file.
 105         * testsuite/testsuite/20_util/specialized_algorithms/pstl/uninitialized_fill_destroy.cc: New file.
 106         * testsuite/testsuite/25_algorithms/pstl/alg_merge/inplace_merge.cc: New file.
 107         * testsuite/testsuite/25_algorithms/pstl/alg_merge/merge.cc: New file.
 108         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/copy_if.cc: New file.
 109         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/copy_move.cc: New file.
 110         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/fill.cc: New file.
 111         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/generate.cc: New file.
 112         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/is_partitioned.cc: New file.
 113         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/partition.cc: New file.
 114         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/partition_copy.cc: New file.
 115         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/remove.cc: New file.
 116         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/remove_copy.cc: New file.
 117         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/replace.cc: New file.
 118         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/replace_copy.cc: New file.
 119         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/rotate.cc: New file.
 120         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/rotate_copy.cc: New file.
 121         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/swap_ranges.cc: New file.
 122         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/transform_binary.cc: New file.
 123         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/transform_unary.cc: New file.
 124         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/unique.cc: New file.
 125         * testsuite/testsuite/25_algorithms/pstl/alg_modifying_operations/unique_copy_equal.cc: New file.
 126         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/adjacent_find.cc: New file.
 127         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/all_of.cc: New file.
 128         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/any_of.cc: New file.
 129         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/count.cc: New file.
 130         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/equal.cc: New file.
 131         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/find.cc: New file.
 132         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/find_end.cc: New file.
 133         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/find_first_of.cc: New file.
 134         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/find_if.cc: New file.
 135         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/for_each.cc: New file.
 136         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/mismatch.cc: New file.
 137         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/none_of.cc: New file.
 138         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/nth_element.cc: New file.
 139         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/reverse.cc: New file.
 140         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/reverse_copy.cc: New file.
 141         * testsuite/testsuite/25_algorithms/pstl/alg_nonmodifying/search_n.cc: New file.
 142         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/includes.cc: New file.
 143         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/is_heap.cc: New file.
 144         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/is_sorted.cc: New file.
 145         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/lexicographical_compare.cc: New file.
 146         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/minmax_element.cc: New file.
 147         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/partial_sort.cc: New file.
 148         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/partial_sort_copy.cc: New file.
 149         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/set.cc: New file.
 150         * testsuite/testsuite/25_algorithms/pstl/alg_sorting/sort.cc: New file.
 151         * testsuite/testsuite/26_numerics/pstl/numeric_ops/adjacent_difference.cc: New file.
 152         * testsuite/testsuite/26_numerics/pstl/numeric_ops/reduce.cc: New file.
 153         * testsuite/testsuite/26_numerics/pstl/numeric_ops/scan.cc: New file.
 154         * testsuite/testsuite/26_numerics/pstl/numeric_ops/transform_reduce.cc: New file.
 155         * testsuite/testsuite/26_numerics/pstl/numeric_ops/transform_scan.cc: New file.
 156
 157 2019-03-21  Jonathan Wakely  <jwakely@redhat.com>
 158
 159         * include/c_compatibility/math.h [!__STDCPP_WANT_MATH_SPEC_FUNCS__]
 160         (assoc_laguerre, assoc_laguerref, assoc_laguerrel, assoc_legendre)
 161         (assoc_legendref, assoc_legendrel, beta, betaf, betal, comp_ellint_1)
 162         (comp_ellint_1f, comp_ellint_1l, comp_ellint_2, comp_ellint_2f)
 163         (comp_ellint_2l, comp_ellint_3, comp_ellint_3f, comp_ellint_3l)
 164         (cyl_bessel_i, cyl_bessel_if, cyl_bessel_il, cyl_bessel_j)
 165         (cyl_bessel_jf, cyl_bessel_jl, cyl_bessel_k, cyl_bessel_kf)
 166         (cyl_bessel_kl, cyl_neumann, cyl_neumannf, cyl_neumannl, ellint_1)
 167         (ellint_1f, ellint_1l, ellint_2, ellint_2f, ellint_2l, ellint_3)
 168         (ellint_3f, ellint_3l, expint, expintf, expintl, hermite, hermitef)
 169         (hermitel, laguerre, laguerref, laguerrel, legendre, legendref)
 170         (legendrel, riemann_zeta, riemann_zetaf, riemann_zetal, sph_bessel)
 171         (sph_besself, sph_bessell, sph_legendre, sph_legendref, sph_legendrel)
 172         (sph_neumann, sph_neumannf, sph_neumannl): Only add using-declarations
 173         when the special functions IS is enabled, not for C++17.
 174         * testsuite/26_numerics/headers/cmath/functions_global_c++17.cc:
 175         Replace with ...
 176         * testsuite/26_numerics/headers/cmath/functions_global.cc: New test,
 177         without checks for special functions in C++17.
 178         * testsuite/26_numerics/headers/cmath/special_functions_global.cc:
 179         New test.
 180
 181         PR libstdc++/88066
 182         * include/backward/hash_map: Use <> for includes not "".
 183         * include/backward/hash_set: Likewise.
 184         * include/backward/strstream: Likewise.
 185         * include/tr1/bessel_function.tcc: Likewise.
 186         * include/tr1/exp_integral.tcc: Likewise.
 187         * include/tr1/legendre_function.tcc: Likewise.
 188         * include/tr1/modified_bessel_func.tcc: Likewise.
 189         * include/tr1/riemann_zeta.tcc: Likewise.
 190
 191 2019-03-19  Jonathan Wakely  <jwakely@redhat.com>
 192
 193         * doc/xml/manual/allocator.xml: Link to table documenting evolution
 194         of extension allocators.
 195         * doc/xml/manual/evolution.xml: Use angle brackets for header names.
 196         Document new headers in 7.2, 8.1 and 9.1 releases.
 197         * doc/xml/manual/using.xml: Adjust link target for new_allocator.
 198         * doc/html/*: Regenerate.
 199
 200 2019-03-12  John David Anglin  <dave.anglin@bell.net>
 201
 202         PR libstdc++/89461
 203         * testsuite/lib/libstdc++.exp: Locate libatomic.
 204         * testsuite/lib/dg-options.exp (add_options_for_libatomic): New.
 205         * testsuite/20_util/shared_ptr/thread/default_weaktoshared.cc: Add
 206         libatomic options.
 207         * testsuite/20_util/shared_ptr/thread/mutex_weaktoshared.cc: Likewise.
 208         * testsuite/experimental/net/timer/waitable/cons.cc: Likewise.
 209         * testsuite/experimental/net/timer/waitable/dest.cc: Likewise.
 210         * testsuite/experimental/net/timer/waitable/ops.cc: Likewise.
 211
 212 2019-03-11  Jonathan Wakely  <jwakely@redhat.com>
 213
 214         PR libstdc++/89460
 215         * configure.ac: Check for sockatmark.
 216         * crossconfig.m4: Check for sockatmark.
 217         * config.h.in: Regenerate.
 218         * configure: Regenerate.
 219         * include/experimental/internet (address_v4::_S_hton): Rename
 220         overloaded functions to _S_hton_16 and _S_ntoh_16.
 221         (address_v4::_S_ntoh): Rename to _S_ntoh_16 and _S_ntoh_32.
 222         (basic_endpoint): Adjust calls to _S_hton and _S_ntoh.
 223         * include/experimental/socket (basic_socket::at_mark): Check
 224         _GLIBCXX_HAVE_SOCKATMARK.
 225
 226         * testsuite/29_atomics/atomic_flag/test_and_set/explicit-hle.cc: Use
 227         const variables instead of macros.
 228
 229         PR libstdc++/89629
 230         * libsupc++/hash_bytes.cc [__SIZEOF_SIZE_T__ == 8] (_Hash_bytes):
 231         Use correct type for len_aligned.
 232         * testsuite/20_util/hash/89629.cc: New test.
 233
 234 2019-03-11  Jakub Jelinek  <jakub@redhat.com>
 235
 236         PR libstdc++/89641
 237         * include/std/atomic (atomic<T>::store, atomic<T>::load,
 238         atomic<T>::exchange, atomic<T>::compare_exchange_weak,
 239         atomic<T>::compare_exchange_strong): Cast __m or __s and __f to int.
 240         * include/bits/atomic_base.h (__atomic_base<T>::operator++,
 241         __atomic_base<T>::operator--, __atomic_base<T>::operator+=,
 242         __atomic_base<T>::operator-=, __atomic_base<T>::operator&=,
 243         __atomic_base<T>::operator|=, __atomic_base<T>::operator^=,
 244         __atomic_base<T*>::operator++, __atomic_base<T*>::operator--,
 245         __atomic_base<T*>::operator+=, __atomic_base<T*>::operator-=): Cast
 246         memory_order_seq_cst to int.
 247
 248 2019-03-08  Jonathan Wakely  <jwakely@redhat.com>
 249
 250         * doc/xml/manual/using.xml: Use link element instead of xref.
 251         * doc/html/*: Regenerate.
 252
 253         * include/bits/fs_path.h (path::format): Add fixed underlying type.
 254
 255 2019-03-08  François Dumont  <fdumont@gcc.gnu.org>
 256
 257         PR libstdc++/89477
 258         * include/debug/map.h (map): Use _RequireNotAllocator to constrain
 259         parameters in deduction guides.
 260         * include/debug/multimap.h (multimap): Likewise.
 261         * include/debug/set.h (multimap): Likewise.
 262         * include/debug/multiset.h (multimap): Likewise.
 263         * include/debug/unordered_map (unordered_map): Likewise.
 264         (unordered_multimap): Likewise.
 265         * include/debug/unordered_set (unordered_set): Likewise.
 266         (unordered_multiset): Likewise.
 267
 268         PR libstdc++/89608
 269         * include/debug/unordered_map (unordered_map<>::_M_check_rehashed):
 270         Invalidate all iterators in case of rehash.
 271         (unordered_multimap<>::_M_check_rehashed): Likewise.
 272         * include/debug/unordered_set
 273         (unordered_set<>::_M_check_rehashed): Likewise.
 274         (unordered_multiset<>::_M_check_rehashed): Likewise.
 275         * testsuite/23_containers/unordered_set/debug/89608_neg.cc: New.
 276
 277 2019-03-07  Andreas Schwab  <schwab@suse.de>
 278
 279         * config/abi/post/riscv64-linux-gnu: New directory.
 280         * config/abi/post/riscv64-linux-gnu/baseline_symbols.txt: New file.
 281
 282 2019-03-07  Jonathan Wakely  <jwakely@redhat.com>
 283
 284         * testsuite/20_util/function_objects/bind_front/1.cc: Change from
 285         compile test to run. Fix typo.
 286
 287         * doc/xml/manual/status_cxx2020.xml: Update C++20 status.
 288         * doc/html/*: Regenerate.
 289
 290         P0356R5 Simplified partial function application
 291         * include/std/functional [C++20] (_Bind_front, _Bind_front_t): Define
 292         helpers for bind_front.
 293         (bind_front, __cpp_lib_bind_front): Define.
 294         * testsuite/20_util/function_objects/bind_front/1.cc: New test.
 295
 296 2019-03-06  Jonathan Wakely  <jwakely@redhat.com>
 297
 298         * include/std/type_traits (__cpp_lib_bounded_array_traits): Define.
 299         * include/std/version (__cpp_lib_bounded_array_traits): Likewise.
 300         * testsuite/20_util/is_bounded_array/value.cc: Check for macro.
 301         * testsuite/20_util/is_unbounded_array/value.cc: Likewise.
 302
 303 2019-03-06  Edward Smith-Rowland  <3dw4rd@verizon.net>
 304
 305         PR libstdc++/86655 - std::assoc_legendre should not constrain
 306         the value of m (or x).
 307         * include/tr1/legendre_function.tcc (__assoc_legendre_p,
 308         __sph_legendre): If degree > order Don't throw, return 0.
 309         (__legendre_p, __assoc_legendre_p): Don't constrain x either.
 310         * testsuite/special_functions/02_assoc_legendre/pr86655.cc: New test.
 311         * testsuite/special_functions/20_sph_legendre/pr86655.cc: New test.
 312         * testsuite/tr1/5_numerical_facilities/special_functions/
 313         02_assoc_legendre/pr86655.cc: New test.
 314         * testsuite/tr1/5_numerical_facilities/special_functions/
 315         22_sph_legendre/pr86655.cc: New test.
 316
 317 2019-03-06  Ville Voutilainen  <ville.voutilainen@gmail.com>
 318
 319         Rewrite variant.
 320         Also PR libstdc++/85517
 321         * include/std/variant (__do_visit): New.
 322         (__variant_cast): Likewise.
 323         (__variant_cookie): Likewise.
 324         (__erased_*): Remove.
 325         (_Variant_storage::_S_vtable): Likewise.
 326         (_Variant_storage::__M_reset_impl): Adjust to use __do_visit.
 327         (_Variant_storage::__M_reset): Adjust.
 328         (__variant_construct): New.
 329         (_Copy_ctor_base(const _Copy_ctor_base&)): Adjust to use
 330         __variant_construct.
 331         (_Move_ctor_base(_Move_ctor_base&&)): Likewise.
 332         (_Move_ctor_base::__M_destructive_copy): New.
 333         (_Move_ctor_base::__M_destructive_move): Adjust to use
 334         __variant_construct.
 335         (_Copy_assign_base::operator=): Adjust to use __do_visit.
 336         (_Copy_assign_alias): Adjust to check both copy assignment
 337         and copy construction for triviality.
 338         (_Move_assign_base::operator=): Adjust to use __do_visit.
 339         (_Multi_array): Add support for visitors that accept and return
 340         a __variant_cookie.
 341         (__gen_vtable_impl::_S_apply_all_alts): Likewise.
 342         (__gen_vtable_impl::_S_apply_single_alt): Likewise.
 343         (__gen_vtable_impl::__element_by_index_or_cookie): New. Generate
 344         a __variant_cookie temporary for a variant that is valueless and..
 345         (__gen_vtable_impl::__visit_invoke): ..adjust here.
 346         (__gen_vtable::_Array_type): Conditionally make space for
 347         the __variant_cookie visitor case.
 348         (__variant_construct_by_index): New.
 349         (get_if): Adjust to use std::addressof.
 350         (relops): Adjust to use __do_visit.
 351         (variant): Add __variant_cast and __variant_construct_by_index
 352         as friends.
 353         (variant::emplace): Use _M_reset() and __variant_construct_by_index
 354         instead of self-destruction.
 355         (variant::swap): Adjust to use __do_visit.
 356         (visit): Reimplement in terms of __do_visit.
 357         (__variant_hash_call_base_impl::operator()): Adjust to use __do_visit.
 358         * testsuite/20_util/variant/compile.cc: Adjust.
 359         * testsuite/20_util/variant/run.cc: Likewise.
 360
 361 2019-03-06  Jonathan Wakely  <jwakely@redhat.com>
 362
 363         * include/bits/c++config.h (_cpp_lib_char8_t): Add L suffix to
 364         constant.
 365         * testsuite/experimental/feat-char8_t.cc: Likewise.
 366
 367          * include/std/type_traits [C++20] (is_bounded_array)
 368          (is_unbounded_array, is_bounded_array_v, is_unbounded_array_v):
 369          Define.
 370          * testsuite/20_util/is_bounded_array/requirements/
 371          explicit_instantiation.cc: New test.
 372          * testsuite/20_util/is_bounded_array/requirements/typedefs.cc: New
 373          test.
 374          * testsuite/20_util/is_bounded_array/value.cc: New test.
 375          * testsuite/20_util/is_unbounded_array/requirements/
 376          explicit_instantiation.cc: New test.
 377          * testsuite/20_util/is_unbounded_array/requirements/typedefs.cc: New
 378          * test.
 379          * testsuite/20_util/is_unbounded_array/value.cc: New test.
 380
 381         * include/bits/ptr_traits.h [C++20] (pointer_traits<T*>::pointer_to):
 382         Add constexpr.
 383         * testsuite/20_util/pointer_traits/pointer_to_constexpr.cc: New test.
 384
 385 2019-03-05  Jonathan Wakely  <jwakely@redhat.com>
 386
 387         * include/c_compatibility/math.h [C++20] (lerp): Add using
 388         declaration.
 389         * include/c_global/cmath [C++20] (__cpp_lib_interpolate): Define.
 390         (__lerp): Define function template to implement lerp.
 391         (lerp(float, float, float), lerp(double, double, double))
 392         (lerp(long double, long double, long double)): Define for C++20.
 393         * include/std/numeric [C++20] (__cpp_lib_interpolate): Define.
 394         (midpoint(T, T), midpoint(T*, T*)): Define.
 395         * include/std::version [C++20] (__cpp_lib_interpolate): Define.
 396         * testsuite/26_numerics/lerp.cc: New test.
 397         * testsuite/26_numerics/midpoint/floating.cc: New test.
 398         * testsuite/26_numerics/midpoint/integral.cc: New test.
 399         * testsuite/26_numerics/midpoint/pointer.cc: New test.
 400
 401 2019-03-04  Edward Smith-Rowland  <3dw4rd@verizon.net>
 402
 403         PR libstdc++/88996 Implement P0439R0
 404         Make std::memory_order a scoped enumeration.
 405         * include/bits/atomic_base.h: For C++20 make memory_order a scoped enum,
 406         add variables for the old enumerators.  Adjust calls.
 407         * testsuite/29_atomics/headers/atomic/types_std_c++2a.cc: New test.
 408         * testsuite/29_atomics/headers/atomic/types_std_c++2a_neg.cc: New test.
 409
 410 2019-03-04  Jonathan Wakely  <jwakely@redhat.com>
 411
 412         * testsuite/26_numerics/bit/bitops.rot/rotl.cc: Remove bogus dg-do
 413         directive.
 414
 415         * include/std/memory_resource (polymorphic_allocator): Add default
 416         template argument for C++20.
 417         (polymorphic_allocator::allocate_bytes)
 418         (polymorphic_allocator::deallocate_bytes)
 419         (polymorphic_allocator::allocate_object)
 420         (polymorphic_allocator::deallocate_object)
 421         (polymorphic_allocator::new_object)
 422         (polymorphic_allocator::delete_object): New member functions for
 423         C++20.
 424         * testsuite/20_util/polymorphic_allocator/allocate_object.cc: New
 425         test.
 426
 427 2019-03-03  Jonathan Wakely  <jwakely@redhat.com>
 428
 429         PR libstdc++/89562
 430         * src/filesystem/ops-common.h (do_copy_file): Open files in binary
 431         mode for mingw.
 432
 433 2019-03-01  Jonathan Wakely  <jwakely@redhat.com>
 434
 435         * testsuite/util/testsuite_allocator.h (__gnu_test::memory_resource)
 436         [!__cpp_sized_deallocation]: Do not pass size to operator delete.
 437
 438         * include/std/memory (uses_allocator_construction_args): New set of
 439         overloaded functions.
 440         (make_obj_using_allocator, uninitialized_construct_using_allocator):
 441         New functions.
 442         * include/std/memory_resource (polymorphic_allocator::construct)
 443         [__cplusplus > 201703l]: Replace all overloads with a single function
 444         using uses_allocator_construction_args.
 445         * testsuite/20_util/polymorphic_allocator/construct_c++2a.cc: New
 446         test.
 447         * testsuite/20_util/uses_allocator/make_obj.cc: New test.
 448
 449 2019-02-27  Jonathan Wakely  <jwakely@redhat.com>
 450
 451         PR libstdc++/89466
 452         * acinclude.m4 (GLIBCXX_CONFIGURE_DOCBOOK): Reorder check for local
 453         stylesheet directories before check for xsltproc. Try to use
 454         xmlcatalog to find local stylesheet directory before trying hardcoded
 455         paths. Add path used by suse to hardcoded paths. Adjust xsltproc
 456         check to look for the same stylesheet as doc/Makefile.am uses. Don't
 457         use xsltproc if xmlcatalog fails to find a local stylesheet.
 458         * configure.ac: Check for xmlcatalog.
 459         * Makefile.in: Regenerate.
 460         * configure: Likewise.
 461         * doc/Makefile.in: Likewise.
 462         * include/Makefile.in: Likewise.
 463         * libsupc++/Makefile.in: Likewise.
 464         * po/Makefile.in: Likewise.
 465         * python/Makefile.in: Likewise.
 466         * src/Makefile.in: Likewise.
 467         * src/c++11/Makefile.in: Likewise.
 468         * src/c++17/Makefile.in: Likewise.
 469         * src/c++98/Makefile.in: Likewise.
 470         * src/filesystem/Makefile.in: Likewise.
 471         * testsuite/Makefile.in: Likewise.
 472
 473 2019-02-26  Jonathan Wakely  <jwakely@redhat.com>
 474
 475         PR libstdc++/89477
 476         * include/bits/alloc_traits.h (_RequireNotAllocator): New helper for
 477         container deduction guides.
 478         * include/bits/hashtable.h (_RequireNotAllocatorOrIntegral): Likewise.
 479         * include/bits/stl_map.h (map): Use _RequireNotAllocator to constrain
 480         parameters in deduction guides.
 481         * include/bits/stl_multimap.h (multimap): Likewise.
 482         * include/bits/stl_multiset.h (multiset): Likewise.
 483         * include/bits/stl_queue.h (queue, priority_queue): Likewise.
 484         * include/bits/stl_set.h (set): Likewise.
 485         * include/bits/stl_stack.h (stack): Likewise.
 486         * include/bits/unordered_map.h (unordered_map, unordered_multimap):
 487         use _RequireNotAllocator and _RequireNotAllocatorOrIntegral to
 488         constrain parameters in deduction guides.
 489         * include/bits/unordered_set.h (unordered_set, unordered_multiset):
 490         Likewise.
 491         * testsuite/23_containers/map/cons/deduction.cc: Test additional
 492         deduction cases.
 493         * testsuite/23_containers/multiset/cons/deduction.cc: Likewise.
 494         * testsuite/23_containers/set/cons/deduction.cc: Likewise.
 495         * testsuite/23_containers/unordered_map/cons/deduction.cc: Likewise.
 496         * testsuite/23_containers/unordered_multimap/cons/deduction.cc:
 497         Likewise.
 498         * testsuite/23_containers/unordered_multiset/cons/deduction.cc:
 499         Likewise.
 500         * testsuite/23_containers/unordered_set/cons/deduction.cc: Likewise.
 501
 502         PR libstdc++/89416
 503         * include/bits/alloc_traits.h (__is_alloc_insertable_impl): Change
 504         to class template and partial specialization using void_t.
 505         (__is_copy_insertable, __is_move_insertable): Adjust base class.
 506
 507 2019-02-24  Jonathan Wakely  <jwakely@redhat.com>
 508
 509         PR libstdc++/89416
 510         * include/bits/alloc_traits.h (__is_alloc_insertable_impl): Make
 511         copy and move members public.
 512
 513 2019-02-23  Jonathan Wakely  <jwakely@redhat.com>
 514
 515         * include/std/type_traits (__underlying_type_impl): New helper to
 516         make underlying_type SFINAE-friendly.
 517         (underlying_type): Derive from __underlying_type_impl.
 518         * testsuite/20_util/underlying_type/requirements/typedefs-3.cc: New
 519         test.
 520
 521         PR libstdc++/89446
 522         * include/bits/char_traits.h (__constant_char_array): Check index is
 523         in range before dereferencing.
 524         (char_traits<char>::compare, char_traits<char>::find)
 525         (char_traits<char8_t>::compare, char_traits<char8_t>::find): Return
 526         immediately if n is zero.
 527         (char_traits<wchar_t>::compare, char_traits<wchar_t>::find): Likewise.
 528         Remove workarounds for PR 67026.
 529         * testsuite/21_strings/basic_string_view/operators/char/89446.cc:
 530         New test.
 531         * testsuite/21_strings/basic_string_view/operators/wchar_t/89446.cc:
 532         New test.
 533
 534 2019-02-22  Eric Botcazou  <ebotcazou@adacore.com>
 535
 536         * config/abi/post/sparc64-linux-gnu/baseline_symbols.txt: Adjust.
 537         * config/abi/post/sparc64-linux-gnu/32/baseline_symbols.txt: Likewise.
 538
 539 2019-02-22  Jakub Jelinek  <jakub@redhat.com>
 540
 541         PR libstdc++/89402
 542         * src/c++98/compatibility-ldbl.cc (_ZNKSt4hashIeEclEe): Change return
 543         type to std::size_t and argument to type to long double.
 544
 545 2019-02-22  Eric Botcazou  <ebotcazou@adacore.com>
 546
 547         * configure.host (abi_baseline_pair): Adjust for SPARC64/Linux.
 548         * config/abi/post/sparc64-linux-gnu: New directory.
 549         * config/abi/post/sparc64-linux-gnu/baseline_symbols.txt: New file.
 550         * config/abi/post/sparc64-linux-gnu/32: New directory.
 551         * config/abi/post/sparc64-linux-gnu/32/baseline_symbols.txt: New file.
 552
 553 2019-02-21  Jonathan Wakely  <jwakely@redhat.com>
 554
 555         * testsuite/29_atomics/headers/atomic/types_std_c++20.cc: New test.
 556         * testsuite/29_atomics/headers/atomic/types_std_c++20_neg.cc: New
 557         test.
 558
 559 2019-02-22  Tom Honermann  <tom@honermann.net>
 560
 561         * python/libstdcxx/v6/printers.py (register_type_printers): Add type
 562         printers for u8string and u8string_view.
 563
 564 2019-02-22  Tom Honermann  <tom@honermann.net>
 565
 566         * testsuite/18_support/byte/ops.cc: Validate
 567         std::to_integer<char8_t>, std::to_integer<char16_t>, and
 568         std::to_integer<char32_t>.
 569         * testsuite/18_support/numeric_limits/dr559.cc: Validate
 570         std::numeric_limits<char8_t>.
 571         * testsuite/18_support/numeric_limits/lowest.cc: Validate
 572         std::numeric_limits<char8_t>::lowest().
 573         * testsuite/18_support/numeric_limits/max_digits10.cc: Validate
 574         std::numeric_limits<char8_t>::max_digits10.
 575         * testsuite/18_support/type_info/fundamental.cc: Validate
 576         typeinfo for char8_t.
 577         * testsuite/20_util/from_chars/1_c++20_neg.cc: New test, validating
 578         std::from_chars with char8_t.
 579         * testsuite/20_util/hash/requirements/explicit_instantiation.cc:
 580         Validate explicit instantiation of std::hash<char8_t>.
 581         * testsuite/20_util/is_integral/value.cc: Validate
 582         std::is_integral<char8_t>.
 583         * testsuite/20_util/make_signed/requirements/typedefs-4.cc:
 584         Validate std::make_signed<char8_t>.
 585         * testsuite/21_strings/basic_string/cons/char/deduction.cc:
 586         Validate u8string construction from char8_t sources.
 587         * testsuite/21_strings/basic_string/types/pmr_typedefs.cc: Validate
 588         std::pmr::u8string.
 589         * testsuite/21_strings/basic_string_view/operations/compare/
 590         char/70483.cc: Validate substr operations on u8string_view.
 591         * testsuite/21_strings/basic_string_view/typedefs.cc: Validate that
 592         the u8string_view typedef is defined.
 593         * testsuite/21_strings/char_traits/requirements/
 594         constexpr_functions.cc: Validate char_traits<char8_t> constexpr
 595         member functions.
 596         * testsuite/21_strings/char_traits/requirements/
 597         constexpr_functions_c++17.cc: Validate char_traits<char8_t> C++17
 598         constexpr member functions.
 599         * testsuite/21_strings/headers/string/types_std_c++0x.cc: Validate
 600         that the u8string typedef is defined.
 601         * testsuite/22_locale/locale/cons/unicode.cc: Validate the presence
 602         of the std::codecvt<char16_t, char8_t, std::mbstate_t> and
 603         std::codecvt<char32_t, char8_t, std::mbstate_t> facets.
 604         * testsuite/29_atomics/atomic/cons/assign_neg.cc: Update line
 605         numbers.
 606         * testsuite/29_atomics/atomic/cons/copy_neg.cc: Likewise.
 607         * testsuite/29_atomics/atomic_integral/cons/assign_neg.cc:
 608         Likewise.
 609         * testsuite/29_atomics/atomic_integral/cons/copy_neg.cc: Likewise.
 610         * testsuite/29_atomics/atomic_integral/is_always_lock_free.cc:
 611         Validate std::atomic<char8_t>::is_always_lock_free
 612         * testsuite/29_atomics/atomic_integral/operators/bitwise_neg.cc:
 613         Update line numbers.
 614         * testsuite/29_atomics/atomic_integral/operators/decrement_neg.cc:
 615         Likewise.
 616         * testsuite/29_atomics/atomic_integral/operators/increment_neg.cc:
 617         Likewise.
 618         * testsuite/experimental/polymorphic_allocator/pmr_typedefs_string.cc:
 619         Validate std::experimental::pmr::u8string.
 620         * testsuite/experimental/string_view/typedefs.cc: Validate that the
 621         u8string_view typedef is defined.
 622         * testsuite/util/testsuite_common_types.h: Add char8_t, char16_t and
 623         char32_t to the typelists.
 624
 625 2019-02-22  Tom Honermann  <tom@honermann.net>
 626
 627         * include/ext/typelist.h: Constrain a partial specialization of
 628         typelist::detail::append_ to only match chain<T1,T2>.
 629
 630 2019-02-21  Jonathan Wakely  <jwakely@redhat.com>
 631
 632         PR libstdc++/89416
 633         * include/bits/alloc_traits.h (__is_alloc_insertable_impl): Replace
 634         class template with class. Replace move and copy member types with
 635         member alias templates, so they are only instantiated when needed.
 636         (__is_copy_insertable, __is_move_insertable): Adjust base class.
 637         * testsuite/23_containers/vector/modifiers/push_back/89130.cc: Enable
 638         test for C++11/14/17 as well.
 639         * testsuite/23_containers/vector/modifiers/push_back/89416.cc: New
 640         test.
 641
 642 2019-02-20  Jakub Jelinek  <jakub@redhat.com>
 643
 644         PR libstdc++/89402
 645         * src/c++98/compatibility-ldbl.cc (_ZNKSt4hashIeEclEe): Add
 646         _GLIBCXX_PURE to the alias declaration.
 647
 648 2019-02-19  Jonathan Wakely  <jwakely@redhat.com>
 649
 650         * testsuite/21_strings/basic_string/literals/types.cc
 651         [_GLIBCXX_USE_CHAR8_T]: Adjust expected string type for u8 literal.
 652         * testsuite/21_strings/basic_string/literals/values.cc
 653         [_GLIBCXX_USE_CHAR8_T]: Likewise.
 654         * testsuite/22_locale/codecvt/char16_t.cc: Adjust for u8 literals
 655         potentially having different type.
 656         * testsuite/22_locale/codecvt/char32_t.cc: Likewise.
 657         * testsuite/22_locale/codecvt/codecvt_utf8/79980.cc: Cast u8 literal
 658         to char.
 659         * testsuite/22_locale/codecvt/codecvt_utf8/wchar_t/1.cc: Likewise.
 660         * testsuite/22_locale/codecvt/utf8.cc: Likewise.
 661         * testsuite/22_locale/conversions/string/2.cc: Remove u8 prefix from
 662         string literals only using basic character set.
 663         * testsuite/22_locale/conversions/string/3.cc: Likewise. Cast other
 664         u8 literals to char.
 665         * testsuite/29_atomics/headers/atomic/macros.cc [_GLIBCXX_USE_CHAR8_T]:
 666         Test ATOMIC_CHAR8_T_LOCK_FREE.
 667         Add missing #error to ATOMIC_CHAR16_T_LOCK_FREE test.
 668         * testsuite/29_atomics/headers/atomic/types_std_c++0x.cc
 669         [_GLIBCXX_USE_CHAR8_T]: Check for std::atomic_char8_t.
 670         * testsuite/experimental/string_view/literals/types.cc
 671         [_GLIBCXX_USE_CHAR8_T]: Adjust expected string_view type for u8
 672         literal.
 673         * testsuite/experimental/string_view/literals/values.cc
 674         [_GLIBCXX_USE_CHAR8_T]: Likewise.
 675
 676 2019-02-19  Tom Honermann  <tom@honermann.net>
 677
 678         * testsuite/18_support/numeric_limits/char8_t.cc: New test cloned
 679         from char16_32_t.cc; validates numeric_limits<char8_t>.
 680         * testsuite/21_strings/basic_string/literals/types-char8_t.cc: New
 681         test cloned from types.cc; validates operator""s for char8_t
 682         returns u8string.
 683         * testsuite/21_strings/basic_string/literals/values-char8_t.cc: New
 684         test cloned from values.cc; validates construction and comparison
 685         of u8string values.
 686         * testsuite/21_strings/basic_string/requirements/
 687         /explicit_instantiation/char8_t/1.cc: New test cloned from
 688         char16_t/1.cc; validates explicit instantiation of
 689         basic_string<char8_t>.
 690         * testsuite/21_strings/basic_string_view/literals/types-char8_t.cc:
 691         New test cloned from types.cc; validates operator""sv for char8_t
 692         returns u8string_view.
 693         * testsuite/21_strings/basic_string_view/literals/
 694         values-char8_t.cc: New test cloned from values.cc; validates
 695         construction and comparison of u8string_view values.
 696         * testsuite/21_strings/basic_string_view/requirements/
 697         explicit_instantiation/char8_t/1.cc: New test cloned from
 698         char16_t/1.cc; validates explicit instantiation of
 699         basic_string_view<char8_t>.
 700         * testsuite/21_strings/char_traits/requirements/char8_t/65049.cc:
 701         New test cloned from char16_t/65049.cc; validates that
 702         char_traits<char8_t> is not vulnerable to the concerns in PR65049.
 703         * testsuite/21_strings/char_traits/requirements/char8_t/
 704         typedefs.cc: New test cloned from char16_t/typedefs.cc; validates
 705         that char_traits<char8_t> member typedefs are present and correct.
 706         * testsuite/21_strings/char_traits/requirements/
 707         explicit_instantiation/char8_t/1.cc: New test cloned from
 708         char16_t/1.cc; validates explicit instantiation of
 709         char_traits<char8_t>.
 710         * testsuite/22_locale/codecvt/char16_t-char8_t.cc: New test cloned
 711         from char16_t.cc: validates
 712         codecvt<char16_t, char8_t, mbstate_t>.
 713         * testsuite/22_locale/codecvt/char32_t-char8_t.cc: New test cloned
 714         from char32_t.cc: validates
 715         codecvt<char32_t, char8_t, mbstate_t>.
 716         * testsuite/22_locale/codecvt/utf8-char8_t.cc: New test cloned from
 717         utf8.cc; validates codecvt<char16_t, char8_t, std::mbstate_t> and
 718         codecvt<char32_t, char8_t, std::mbstate_t>.
 719         * testsuite/27_io/filesystem/path/native/string-char8_t.cc: New
 720         test cloned from string.cc; validates filesystem::path construction
 721         from char8_t input.
 722         * testsuite/experimental/feat-char8_t.cc: New test; validates that
 723         the __cpp_lib_char8_t feature test macro is defined with the
 724         correct value.
 725         * testsuite/experimental/filesystem/path/native/string-char8_t.cc:
 726         New test cloned from string.cc; validates filesystem::path
 727         construction from char8_t input.
 728         * testsuite/experimental/string_view/literals/types-char8_t.cc: New
 729         test cloned from types.cc; validates operator""sv for char8_t
 730         returns u8string_view.
 731         * testsuite/experimental/string_view/literals/values-char8_t.cc:
 732         New test cloned from values.cc; validates construction and
 733         comparison of u8string_view values.
 734         * testsuite/experimental/string_view/requirements/
 735         explicit_instantiation/char8_t/1.cc: New test cloned from
 736         char16_t/1.cc; validates explicit instantiation of
 737         basic_string_view<char8_t>.
 738         * testsuite/ext/char8_t/atomic-1.cc: New test; validates that
 739         ATOMIC_CHAR8_T_LOCK_FREE is not defined if char8_t support is not
 740         enabled.
 741
 742 2019-02-19  Tom Honermann  <tom@honermann.net>
 743
 744         P0482R5 char8_t: Standard library support
 745         * config/abi/pre/gnu-versioned-namespace.ver (CXXABI_2.0): Add
 746         typeinfo symbols for char8_t.
 747         * config/abi/pre/gnu.ver: Add CXXABI_1.3.12.
 748         (GLIBCXX_3.4.26): Add symbols for specializations of
 749         numeric_limits and codecvt that involve char8_t.
 750         (CXXABI_1.3.12): Add typeinfo symbols for char8_t.
 751         * include/bits/atomic_base.h: Add atomic_char8_t.
 752         * include/bits/basic_string.h: Add std::hash<u8string> and
 753         operator""s(const char8_t*, size_t).
 754         * include/bits/c++config: Define _GLIBCXX_USE_CHAR8_T and
 755         __cpp_lib_char8_t.
 756         * include/bits/char_traits.h: Add char_traits<char8_t>.
 757         * include/bits/codecvt.h: Add
 758         codecvt<char16_t, char8_t, mbstate_t>,
 759         codecvt<char32_t, char8_t, mbstate_t>,
 760         codecvt_byname<char16_t, char8_t, mbstate_t>, and
 761         codecvt_byname<char32_t, char8_t, mbstate_t>.
 762         * include/bits/cpp_type_traits.h: Add __is_integer<char8_t> to
 763         recognize char8_t as an integral type.
 764         * include/bits/fs_path.h: (path::__is_encoded_char): Recognize
 765         char8_t.
 766         (path::u8string): Return std::u8string when char8_t support is
 767         enabled.
 768         (path::generic_u8string): Likewise.
 769         (path::_S_convert): Handle conversion from char8_t input.
 770         (path::_S_str_convert): Likewise.
 771         * include/bits/functional_hash.h: Add hash<char8_t>.
 772         * include/bits/locale_conv.h (__str_codecvt_out): Add overloads for
 773         char8_t.
 774         * include/bits/locale_facets.h (_GLIBCXX_NUM_UNICODE_FACETS): Bump
 775         for new char8_t specializations.
 776         * include/bits/localefwd.h: Add missing declarations of
 777         codecvt<char16_t, char, mbstate_t> and
 778         codecvt<char32_t, char, mbstate_t>.  Add char8_t declarations
 779         codecvt<char16_t, char8_t, mbstate_t> and
 780         codecvt<char32_t, char8_t, mbstate_t>.
 781         * include/bits/postypes.h: Add u8streampos
 782         * include/bits/stringfwd.h: Add declarations of
 783         char_traits<char8_t> and u8string.
 784         * include/c_global/cstddef: Add __byte_operand<char8_t>.
 785         * include/experimental/bits/fs_path.h (path::__is_encoded_char):
 786         Recognize char8_t.
 787         (path::u8string): Return std::u8string when char8_t support is
 788         enabled.
 789         (path::generic_u8string): Likewise.
 790         (path::_S_convert): Handle conversion from char8_t input.
 791         (path::_S_str_convert): Likewise.
 792         * include/experimental/string: Add u8string.
 793         * include/experimental/string_view: Add u8string_view,
 794         hash<experimental::u8string_view>, and
 795         operator""sv(const char8_t*, size_t).
 796         * include/std/atomic: Add atomic<char8_t> and atomic_char8_t.
 797         * include/std/charconv (__is_int_to_chars_type): Recognize char8_t
 798         as a character type.
 799         * include/std/limits: Add numeric_limits<char8_t>.
 800         * include/std/string_view: Add u8string_view,
 801         hash<experimental::u8string_view>, and
 802         operator""sv(const char8_t*, size_t).
 803         * include/std/type_traits: Add __is_integral_helper<char8_t>,
 804         __make_unsigned<char8_t>, and __make_signed<char8_t>.
 805         * libsupc++/atomic_lockfree_defines.h: Define
 806         ATOMIC_CHAR8_T_LOCK_FREE.
 807         * src/c++11/Makefile.am: Compile with -fchar8_t when compiling
 808         codecvt.cc and limits.cc so that char8_t specializations of
 809         numeric_limits and codecvt and emitted.
 810         * src/c++11/Makefile.in: Likewise.
 811         * src/c++11/codecvt.cc: Define members of
 812         codecvt<char16_t, char8_t, mbstate_t>,
 813         codecvt<char32_t, char8_t, mbstate_t>,
 814         codecvt_byname<char16_t, char8_t, mbstate_t>, and
 815         codecvt_byname<char32_t, char8_t, mbstate_t>.
 816         * src/c++11/limits.cc: Define members of
 817         numeric_limits<char8_t>.
 818         * src/c++98/Makefile.am: Compile with -fchar8_t when compiling
 819         locale_init.cc and localename.cc.
 820         * src/c++98/Makefile.in: Likewise.
 821         * src/c++98/locale_init.cc: Add initialization for the
 822         codecvt<char16_t, char8_t, mbstate_t> and
 823         codecvt<char32_t, char8_t, mbstate_t> facets.
 824         * src/c++98/localename.cc: Likewise.
 825         * testsuite/util/testsuite_abi.cc: Validate ABI bump.
 826
 827 2019-02-18  Wilco Dijkstra  <wdijkstr@arm.com>
 828
 829         * 27_io/filesystem/operations/all.cc: Add dg-require-filesystem-ts.
 830         * 27_io/filesystem/operations/resize_file.cc: Likewise.
 831         * 27_io/filesystem/path/generation/normal2.cc: Likewise.
 832
 833 2019-02-14  Jonathan Wakely  <jwakely@redhat.com>
 834
 835         * doc/xml/manual/status_cxx2020.xml: Update P0887R1 status.
 836         * doc/html/*: Regenerate.
 837
 838         * doc/xml/manual/status_cxx2017.xml: Add P0063R3 to status table.
 839         * doc/html/*: Regenerate.
 840
 841         * doc/xml/manual/intro.xml: Document LWG 2586 status.
 842         * include/bits/uses_allocator.h (__uses_alloc): Use const lvalue
 843         allocator type in is_constructible checks.
 844         * testsuite/20_util/scoped_allocator/69293_neg.cc: Adjust dg-error.
 845         * testsuite/20_util/scoped_allocator/dr2586.cc: New test.
 846         * testsuite/20_util/tuple/cons/allocators.cc: Add test using
 847         problematic type from LWG 2586 discussion.
 848         * testsuite/20_util/uses_allocator/69293_neg.cc: Adjust dg-error.
 849         * testsuite/20_util/uses_allocator/cons_neg.cc: Likewise.
 850
 851         * configure.ac: Check for C11 timespec_get function.
 852         * crossconfig.m4 (freebsd, linux, gnu, cygwin, solaris, netbsd)
 853         (openbsd): Likewise
 854         * config.h.in: Regenerate.
 855         * configure: Regenerate.
 856         * include/c_global/ctime (timespec, timespec_get): Add to namespace
 857         std for C++17 and up.
 858
 859         * doc/xml/manual/intro.xml: Document LWG 2537 status.
 860         * include/bits/stl_queue.h
 861         (priority_queue(const Compare&, const Container&, const Alloc&))
 862         (priority_queue(const Compare&, Container&&, const Alloc&)): Call
 863         make_heap.
 864         * testsuite/23_containers/priority_queue/dr2537.cc: New test.
 865
 866         * doc/xml/manual/intro.xml: Document LWG 2566 status.
 867         * include/bits/stl_queue.h (queue, priority_queue): Add static
 868         assertions to enforce LWG 2566 requirement on value_type.
 869         * include/bits/stl_stack.h (stack): Likewise.
 870
 871         PR middle-end/89303
 872         * testsuite/20_util/enable_shared_from_this/89303.cc: New test.
 873
 874         * doc/xml/manual/intro.xml: Document LWG 2735 status.
 875         * include/bits/std_abs.h: Add comment about LWG 2735.
 876         * testsuite/26_numerics/headers/cstdlib/dr2735.cc: New test.
 877
 878 2019-02-13  Jonathan Wakely  <jwakely@redhat.com>
 879
 880         PR libstdc++/89345
 881         * include/std/version [__cpp_impl_destroying_delete]
 882         (__cpp_lib_destroying_delete): Only define for C++2a and later.
 883         * libsupc++/new [__cpp_impl_destroying_delete]
 884         (__cpp_lib_destroying_delete): Likewise.
 885         (destroying_delete_t, destroying_delete): Likewise, but define even
 886         when __cpp_impl_destroying_delete is not defined.
 887         * testsuite/18_support/destroying_delete.cc: New test.
 888
 889 2019-02-11  Jonathan Wakely  <jwakely@redhat.com>
 890
 891         PR libstdc++/89023
 892         * testsuite/17_intro/headers/c++2011/parallel_mode.cc: New test.
 893         * testsuite/17_intro/headers/c++2014/parallel_mode.cc: New test.
 894         * testsuite/17_intro/headers/c++2017/parallel_mode.cc: New test.
 895         * testsuite/28_regex/headers/regex/parallel_mode.cc: Remove.
 896
 897 2019-02-09  Jonathan Wakely  <jwakely@redhat.com>
 898
 899         PR libstdc++/71044
 900         * include/bits/fs_path.h (path::has_root_name)
 901         (path::has_root_directory, path::has_root_path)
 902         (path::has_relative_path, path::has_parent_path)
 903         (path::has_filename, path::has_stem, path::has_extension)
 904         (path::is_absolute, path::is_relative, path::_M_find_extension): Add
 905         noexcept.
 906         * src/c++17/fs_path.cc (path::has_root_name)
 907         (path::has_root_directory, path::has_root_path)
 908         (path::has_relative_path, path::has_parent_path)
 909         (path::has_filename, path::_M_find_extension): Add noexcept.
 910
 911 2019-02-06  Jonathan Wakely  <jwakely@redhat.com>
 912
 913         PR libstdc++/89102 (partial)
 914         * include/std/type_traits (common_type<>): Define.
 915         (common_type<T>): Derive from common_type<T, T>.
 916         * testsuite/20_util/common_type/requirements/explicit_instantiation.cc:
 917         Test zero-length template argument list.
 918         * testsuite/20_util/common_type/requirements/sfinae_friendly_1.cc:
 919         Test additional single argument cases.
 920         * testsuite/20_util/common_type/requirements/sfinae_friendly_2.cc:
 921         Adjust expected error.
 922
 923 2019-02-05  Jonathan Wakely  <jwakely@redhat.com>
 924
 925         PR libstdc++/89128
 926         * include/bits/stl_queue.h (queue, priority_queue): Add deduction
 927         guides.
 928         * include/bits/stl_stack.h (stack): Likewise.
 929         * testsuite/23_containers/priority_queue/deduction.cc: New test.
 930         * testsuite/23_containers/queue/deduction.cc: New test.
 931         * testsuite/23_containers/stack/deduction.cc: New test.
 932
 933         PR libstdc++/89194
 934         * include/std/type_traits (__is_convertible_helper)
 935         (__is_convertible_helper<_From, _To, false>): Revert changes to
 936         support is_nothrow_convertible.
 937         (__is_nt_convertible_helper): New helper.
 938         (is_nothrow_convertible): Use __is_nt_convertible_helper.
 939
 940         * testsuite/23_containers/vector/modifiers/push_back/49836.cc: Restore
 941         use of CopyConsOnlyType, but also test DelAnyAssign for completeness.
 942
 943         PR libstdc++/89130
 944         * include/bits/alloc_traits.h (__is_copy_insertable_impl): Rename to
 945         __is_alloc_insertable_impl. Replace single type member with two
 946         members, one for each of copy and move insertable.
 947         (__is_move_insertable): New trait for internal use.
 948         * include/bits/stl_vector.h (vector::_S_nothrow_relocate(true_type))
 949         (vector::_S_nothrow_relocate(true_type)): New functions to
 950         conditionally check if __relocate_a can throw.
 951         (vector::_S_use_relocate()): Dispatch to _S_nothrow_relocate based
 952         on __is_move_insertable.
 953         (vector::_S_do_relocate): New overloaded functions to conditionally
 954         call __relocate_a.
 955         (vector::_S_relocate): New function that dispatches to _S_do_relocate
 956         based on _S_use_relocate.
 957         * include/bits/vector.tcc (vector::reserve, vector::_M_realloc_insert)
 958         (vector::_M_default_append): Call _S_relocate instead of __relocate_a.
 959         * testsuite/23_containers/vector/modifiers/push_back/89130.cc: New.
 960
 961         PR libstdc++/89090
 962         * include/bits/stl_uninitialized.h (__relocate_a_1): Make unused
 963         parameter unnamed. Add message to static assertion.
 964         * include/bits/vector.tcc (vector::reserve, vector::_M_realloc_insert)
 965         (vector::_M_default_append): Use _GLIBCXX17_CONSTEXPR for if constexpr
 966         in C++11 code.
 967
 968 2019-02-05  Marc Glisse  <marc.glisse@inria.fr>
 969
 970         PR libstdc++/87106
 971         * include/bits/stl_uninitialized.h (__is_trivially_relocatable):
 972         Rename...
 973         (__is_bitwise_relocatable): ... to this.
 974         (__relocate_a_1): Adapt.
 975         * include/bits/stl_deque.h (__is_trivially_relocatable): Rename...
 976         (__is_bitwise_relocatable): ... to this.
 977
 978 2019-01-30  Jonathan Wakely  <jwakely@redhat.com>
 979
 980         PR libstdc++/89117
 981         * src/c++17/fs_path.cc (path::replace_extension): Erase extension from
 982         final component as well as from _M_pathname. Append the dot using
 983         operator+= instead of only to _M_pathname.
 984         (path::_M_find_extension): Reformat slightly.
 985         * testsuite/27_io/filesystem/path/modifiers/replace_extension.cc:
 986         Add more test cases.
 987
 988 2019-01-30  Ulrich Drepper  <drepper@redhat.com>
 989
 990         * doc/xml/manual/status_cxx2020.xml: Update P0600 entry.
 991
 992 2019-01-29  Jonathan Wakely  <jwakely@redhat.com>
 993
 994         * testsuite/26_numerics/headers/complex/synopsis.cc: Remove incorrect
 995         constexpr specifiers from arg and proj.
 996
 997         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Add missing exports for
 998         __shared_ptr instantiations used by gcc4-compatible ABI.
 999
1000         * include/experimental/forward_list (experimental::erase): Qualify
1001         call to erase_if.
1002         * include/experimental/list (experimental::erase): Likewise.
1003         * include/std/forward_list (std::erase): Likewise.
1004         * include/std/list (std::erase): Likewise.
1005
1006         * testsuite/20_util/reference_wrapper/result_type.cc: Disable for
1007         C++2a.
1008         * testsuite/20_util/reference_wrapper/typedefs-2.cc: Likewise.
1009         * testsuite/20_util/reference_wrapper/typedefs-3.cc: Likewise.
1010         * testsuite/20_util/reference_wrapper/typedefs.cc: Likewise.
1011         * testsuite/30_threads/async/54297.cc: Suppress nodiscard warning.
1012         * testsuite/ext/array_allocator/26875.cc: Likewise.
1013         * testsuite/ext/pool_allocator/allocate_chunk.cc: Likewise.
1014         * testsuite/util/replacement_memory_operators.h: Likewise.
1015         * testsuite/util/testsuite_allocator.h: Likewise.
1016
1017         * include/std/memory_resource (__pool_resource::_M_unpooled): Use
1018         normal mode vector, even for debug mode.
1019         * include/std/vector [_GLIBCXX_DEBUG] (_GLIBCXX_STD_C::pmr::vector):
1020         Define alias template for normal mode vector.
1021
1022 2019-01-28  Jonathan Wakely  <jwakely@redhat.com>
1023
1024         PR libstdc++/68737
1025         * config/locale/generic/c_locale.h (__convert_from_v)
1026         [_GLIBCXX_USE_C99_STDIO]: Also check _GLIBCXX_HAVE_BROKEN_VSNPRINTF.
1027         * config/os/hpux/os_defines.h: Define _GLIBCXX_HAVE_BROKEN_VSNPRINTF.
1028         * include/bits/locale_facets.tcc (num_put::_M_insert_float)
1029         [_GLIBCXX_USE_C99_STDIO]: Also check _GLIBCXX_HAVE_BROKEN_VSNPRINTF.
1030
1031 2019-01-24  Jonathan Wakely  <jwakely@redhat.com>
1032
1033         PR libstdc++/88840
1034         * include/bits/stl_vector.h (vector::__use_relocate): Replace static
1035         data member with static member function _S_use_relocate().
1036         * include/bits/vector.tcc (vector::reserve, vector::_M_realloc_insert)
1037         (vector::_M_default_append): Use _S_use_relocate() instead of
1038         __use_relocate.
1039
1040         * testsuite/27_io/filesystem/path/compare/strings.cc: Only compare
1041         sign of results.
1042
1043 2019-01-22  Jonathan Wakely  <jwakely@redhat.com>
1044
1045         PR libstdc++/88740
1046         * testsuite/util/testsuite_hooks.h [stderr] (VERIFY): Use fprintf to
1047         write to stderr instead of using printf.
1048
1049 2019-01-21  Jakub Jelinek  <jakub@redhat.com>
1050
1051         PR libstdc++/86590
1052         * include/bits/char_traits.h (__constant_string_p,
1053         __constant_char_array_p): Use __builtin_is_constant_evaluated if
1054         available.
1055
1056 2019-01-20  Ulrich Drepper  <drepper@redhat.com>
1057
1058         Implement C++20 P0600r1.
1059         * include/backward/hash_map: Add nodiscard attribute to empty.
1060         * include/backward/hash_set: Likewise.
1061         * backward/hashtable.h: Likewise.
1062         * include/bits/basic_string.h: Likewise.
1063         * include/bits/forward_list.h: Likewise.
1064         * include/bits/hashtable.h: Likewise.
1065         * include/bits/regex.h: Likewise.
1066         * include/bits/stl_deque.h: Likewise.
1067         * include/bits/stl_list.h: Likewise.
1068         * include/bits/stl_map.h: Likewise.
1069         * include/bits/stl_multimap.h: Likewise.
1070         * include/bits/stl_multiset.h: Likewise.
1071         * include/bits/stl_queue.h: Likewise.
1072         * include/bits/stl_set.h: Likewise.
1073         * include/bits/stl_stack.h: Likewise.
1074         * include/bits/stl_tree.h: Likewise.
1075         * include/bits/stl_vector.h: Likewise.
1076         * include/bits/unordered_map.h: Likewise.
1077         * include/bits/unordered_set.h: Likewise.
1078         * include/debug/array: Likewise.
1079         * include/experimental/any: Likewise.
1080         * include/experimental/bits/fs_path.h: Likewise.
1081         * include/experimental/internet: Likewise.
1082         * include/experimental/string_view: Likewise.
1083         * include/ext/pb_ds/detail/bin_search_tree_/info_fn_imps.hpp:
1084         Likewise.
1085         * include/ext/pb_ds/detail/binary_heap_/binary_heap_.hpp:
1086         Likewise.
1087         * include/ext/pb_ds/detail/binary_heap_/info_fn_imps.hpp:
1088         Likewise.
1089         * include/ext/pb_ds/detail/cc_hash_table_map_/cc_ht_map_.hpp:
1090         Likewise.
1091         * include/ext/pb_ds/detail/cc_hash_table_map_/info_fn_imps.hpp:
1092         Likewise.
1093         * include/ext/pb_ds/detail/cc_hash_table_map_/size_fn_imps.hpp:
1094         Likewise.
1095         * include/ext/pb_ds/detail/gp_hash_table_map_/gp_ht_map_.hpp:
1096         Likewise.
1097         * include/ext/pb_ds/detail/gp_hash_table_map_/info_fn_imps.hpp:
1098         Likewise.
1099         * include/ext/pb_ds/detail/left_child_next_sibling_heap_/
1100         info_fn_imps.hpp: Likewise.
1101         * include/ext/pb_ds/detail/left_child_next_sibling_heap_/
1102         left_child_next_sibling_heap_.hpp: Likewise.
1103         * include/ext/pb_ds/detail/list_update_map_/info_fn_imps.hpp:
1104         Likewise.
1105         * include/ext/pb_ds/detail/list_update_map_/lu_map_.hpp:
1106         Likewise.
1107         * include/ext/pb_ds/detail/ov_tree_map_/info_fn_imps.hpp:
1108         Likewise.
1109         * include/ext/pb_ds/detail/ov_tree_map_/ov_tree_map_.hp:
1110         Likewise.
1111         * include/ext/pb_ds/detail/pat_trie_/info_fn_imps.hpp:
1112         Likewise.
1113         * include/ext/pb_ds/detail/pat_trie_/pat_trie_.hpp:
1114         Likewise.
1115         * include/ext/pb_ds/detail/rc_binomial_heap_/rc.hpp:
1116         Likewise.
1117         * include/ext/pb_ds/detail/tree_trace_base.hpp: Likewise.
1118         * include/ext/pb_ds/trie_policy.hpp: Likewise.
1119         * include/ext/rope: Likewise.
1120         * include/ext/slist: Likewise.
1121         * include/ext/vstring.h: Likewise.
1122         * include/profile/array: Likewise.
1123         * include/std/array: Likewise.
1124         * include/tr1/array: Likewise.
1125         * include/tr1/hashtable.h: Likewise.
1126         * include/tr1/regex: Likewise.
1127         * include/tr2/dynamic_bitset: Likewise.
1128         * include/bits/alloc_traits.h: Add nodiscard attribute to
1129         allocate.
1130         * include/experimental/memory_resource: Likewise.
1131         * include/ext/alloc_traits.h: Likewise.
1132         * include/ext/array_allocator.h: Likewise.
1133         * include/ext/bitmap_allocator.h: Likewise.
1134         * include/ext/debug_allocator.h: Likewise.
1135         * include/ext/extptr_allocator.h: Likewise.
1136         * include/ext/mt_allocator.h: Likewise.
1137         * include/ext/new_allocator.h: Likewise.
1138         * include/ext/pool_allocator.h: Likewise.
1139         * include/ext/throw_allocator.h: Likewise.
1140         * include/std/scoped_allocator: Likewise.
1141         * libsupc++/eh_alloc.cc: Likewise.
1142         * include/std/future: Add nodiscard attribute to async.
1143         * libsupc++/new: Add nodiscard attribute to new.
1144
1145 2019-01-18  Jonathan Wakely  <jwakely@redhat.com>
1146
1147         PR libstdc++/87514
1148         PR libstdc++/87520
1149         PR libstdc++/88782
1150         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Export new symbol.
1151         * include/bits/shared_ptr.h
1152         (shared_ptr(_Sp_make_shared_tag, const Alloc&, Args&&...))
1153         (allocate_shared): Change to use new tag type.
1154         * include/bits/shared_ptr_base.h (_Sp_make_shared_tag::_S_eq):
1155         Declare new member function.
1156         (_Sp_alloc_shared_tag): Define new type.
1157         (_Sp_counted_ptr_inplace): Declare __shared_count<_Lp> as a friend.
1158         (_Sp_counted_ptr_inplace::_M_get_deleter) [!__cpp_rtti]: Use
1159         _Sp_make_shared_tag::_S_eq to check type_info.
1160         (__shared_count(Ptr, Deleter),__shared_count(Ptr, Deleter, Alloc)):
1161         Constrain to prevent being called with _Sp_alloc_shared_tag.
1162         (__shared_count(_Sp_make_shared_tag, const _Alloc&, Args&&...)):
1163         Replace constructor with ...
1164         (__shared_count(Tp*&, _Sp_alloc_shared_tag<_Alloc>, Args&&...)): Use
1165         reference parameter so address of the new object can be returned to
1166         the caller. Obtain the allocator from the tag type.
1167         (__shared_ptr(_Sp_make_shared_tag, const Alloc&, Args&&...)): Replace
1168         constructor with ...
1169         (__shared_ptr(_Sp_alloc_shared_tag<Alloc>, Args&&...)): Pass _M_ptr
1170         to the __shared_count constructor.
1171         (__allocate_shared): Change to use new tag type.
1172         * src/c++11/shared_ptr.cc (_Sp_make_shared_tag::_S_eq): Define.
1173
1174 2019-01-17  Jonathan Wakely  <jwakely@redhat.com>
1175
1176         * src/c++17/fs_ops.cc
1177         (equivalent(const path&, const path&, error_code&))
1178         [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Use GetFileInformationByHandle to
1179         compare files instead of relying on incomplete info returned by stat.
1180
1181         PR libstdc++/88884
1182         * src/c++17/fs_ops.cc (absolute(const path&, error_code&)): Do nothing
1183         if the path is already absolute.
1184         [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Normalize root-directory.
1185         [!_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Pass error_code to current_path.
1186
1187         PR libstdc++/88881
1188         * src/c++17/fs_ops.cc (canonical(const path&, error_code&))
1189         [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Normalize path, to match behaviour
1190         of filesystem::exists.
1191         (create_directories(const path&, error_code&)): Add assertions.
1192         (status(const path&, error_code&)) [_GLIBCXX_FILESYSTEM_IS_WINDOWS]:
1193         Add workaround for bug in _wstat for paths with trailing slash.
1194         * testsuite/27_io/filesystem/operations/create_directories.cc: Adjust
1195         for expected behaviour on mingw.
1196         * testsuite/experimental/filesystem/operations/create_directories.cc:
1197         Likewise.
1198         * testsuite/27_io/filesystem/operations/temp_directory_path.cc: Use
1199         "TMP" instead of "TMPDIR" and clean environment before each test. Do
1200         not test permissions on mingw targets.
1201
1202 2019-01-16  Jonathan Wakely  <jwakely@redhat.com>
1203
1204         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Add exports for fstream
1205         constructors and open members taking wide strings. Fix patterns for
1206         filesystem::path members to match wstring_view parameters. Add
1207         exports for shared_ptr members used by directory iterators.
1208         * src/c++17/fs_ops.cc (remove(const path&, error_code&)): Clear the
1209         error code parameter if the file doesn't exist.
1210         * src/filesystem/ops.cc (remove(const path&, error_code&)):
1211         Likewise.
1212         * testsuite/27_io/filesystem/operations/canonical.cc: Fix expected
1213         values for mingw targets, where "/" is not an absolute path. Do not
1214         test symlinks on mingw targets.
1215         * testsuite/experimental/filesystem/operations/canonical.cc: Likewise.
1216         * testsuite/27_io/filesystem/operations/copy.cc: Do not test symlinks
1217         on mingw targets.
1218         * testsuite/experimental/filesystem/operations/copy.cc: Likewise.
1219         * testsuite/27_io/filesystem/operations/create_directories.cc: Check
1220         that each component of the path is created.
1221         * testsuite/experimental/filesystem/operations/create_directories.cc:
1222         Likewise.
1223         * testsuite/27_io/filesystem/operations/exists.cc: Do not test
1224         permissions on mingw targets.
1225         * testsuite/experimental/filesystem/operations/exists.cc: Likewise.
1226         * testsuite/27_io/filesystem/operations/is_empty.cc: Likewise.
1227         * testsuite/experimental/filesystem/operations/is_empty.cc: Likewise.
1228         * testsuite/27_io/filesystem/operations/permissions.cc: XFAIL for
1229         mingw targets.
1230         * testsuite/experimental/filesystem/operations/permissions.cc:
1231         Likewise.
1232         * testsuite/27_io/filesystem/operations/remove.cc: Do not test
1233         symlinks or permissions on mingw targets.
1234         * testsuite/experimental/filesystem/operations/remove.cc: Likewise.
1235         * testsuite/27_io/filesystem/operations/remove_all.cc: Do not test
1236         symlinks on mingw targets.
1237         * testsuite/experimental/filesystem/operations/remove_all.cc:
1238         Likewise.
1239         * testsuite/27_io/filesystem/operations/status.cc: Do not test
1240         permissions on mingw targets.
1241         * testsuite/27_io/filesystem/operations/weakly_canonical.cc: Do not
1242         test symlinks on mingw targets.
1243         * testsuite/experimental/filesystem/operations/space.cc: Fix test
1244         for mingw targets.
1245
1246 2019-02-14  Ulrich Drepper  <drepper@redhat.com>
1247
1248         PR libstdc++/88738
1249         Warn about unused comparisons of shared_ptr/unique_ptr
1250         * include/bits/c++config [_GLIBCXX_NODISCARD]: Define.
1251         * include/bits/shared_ptr.h: Use it for operator ==, !=,
1252         <, <=, >, >= for shared_ptr.
1253         * include/bits/unique_ptr.h: Likewise for unique_ptr.
1254
1255 2019-01-15  Jonathan Wakely  <jwakely@redhat.com>
1256
1257         * include/bits/shared_ptr_base.h (__cpp_lib_shared_ptr_arrays): Define
1258         as 201611L, because P0497R0 changes are supported.
1259         * include/std/version (__cpp_lib_shared_ptr_arrays): Likewise.
1260
1261         * include/bits/erase_if.h [__cplusplus > 201703L]
1262         (__cpp_lib_erase_if): Only define for C++2a.
1263         * include/std/iterator [__cplusplus >= 201402L && !_GLIBCXX_DEBUG]
1264         (__cpp_lib_null_iterators): Define.
1265         * include/std/version [__cplusplus >= 201402L && !_GLIBCXX_DEBUG]
1266         (__cpp_lib_null_iterators): Define.
1267         [__cpp_impl_destroying_delete] (__cpp_lib_destroying_delete): Define.
1268
1269         * doc/xml/manual/status_cxx2017.xml: Document P0032R3 and P0307R2
1270         status.
1271         * include/bits/stl_uninitialized.h (__cpp_lib_raw_memory_algorithms):
1272         Define.
1273         * include/std/any (__cpp_lib_any): Define as 201606L, because P0032R3
1274         changes are supported.
1275         * include/std/optional (__cpp_lib_optional): Likewise.
1276         * include/std/variant (__cpp_lib_variant): Likewise.
1277         * include/std/version [!__STRICT_ANSI__]
1278         (__cpp_lib_uncaught_exceptions): Define as long integer.
1279         [__cplusplus >= 201703L] (__cpp_lib_any)
1280         (__cpp_lib_raw_memory_algorithms, __cpp_lib_uncaught_exceptions)
1281         (__cpp_lib_variant): Define for C++17.
1282         [__cplusplus >= 201703L] (__cpp_lib_optional): Update value and define
1283         as long integer.
1284         * libsupc++/exception (__cpp_lib_uncaught_exceptions): Define as long
1285         integer.
1286
1287         * doc/xml/manual/status_cxx2020.xml: Update P1123R0 status.
1288
1289 2019-01-12  Jonathan Wakely  <jwakely@redhat.com>
1290
1291         PR libstdc++/88811
1292         PR libstdc++/83306
1293         * src/filesystem/path.cc: Fix typo. If first path is empty, show []
1294         before second path.
1295         * testsuite/experimental/filesystem/filesystem_error/cons.cc: New
1296         test.
1297
1298 2019-01-11  Jonathan Wakely  <jwakely@redhat.com>
1299
1300         * doc/xml/manual/intro.xml: Include new section.
1301         * doc/xml/manual/status_cxx2017.xml: Document more
1302         implementation-defined properties of the library.
1303         * doc/xml/manual/status_cxx2020.xml: Document C++2a status.
1304         * doc/html/*: Regenerate.
1305
1306         * include/bits/refwrap.h [__cplusplus > 201703L]
1307         (_Refwrap_base_arg1, _Refwrap_base_arg2, _Reference_wrapper_base)
1308         (_Reference_wrapper_base_memfun): Do not define for C++2a.
1309         (reference_wrapper): Do not derive from _Reference_wrapper_base_memfun
1310         for C++2a.
1311         (reference_wrapper::operator()): Add static assertion.
1312         * testsuite/20_util/reference_wrapper/incomplete.cc: New test.
1313
1314         * include/std/chrono (duration_values::zero(), duration_values::min())
1315         (duration_values::max()): Add noexcept.
1316         (duration::zero(), duration::min(), duration::max()): Likewise.
1317         (time_point::zero(), time_point::min(), time_point::max()): Likewise.
1318         * testsuite/20_util/duration/requirements/noexcept.cc: New test.
1319         * testsuite/20_util/time_point/requirements/noexcept.cc: New test.
1320
1321         * include/std/version (__cpp_lib_erase_if): Move to C++20 group.
1322
1323 2019-01-11  Jakub Jelinek  <jakub@redhat.com>
1324
1325         * include/std/type_traits (__cpp_lib_is_constant_evaluated): Define.
1326         * include/std/version (__cpp_lib_is_constant_evaluated): Define.
1327
1328 2019-01-11  Jonathan Wakely  <jwakely@redhat.com>
1329
1330         PR libstdc++/88802
1331         * include/bits/functional_hash.h (hash<nullptr_t>): Define
1332         specialization for C++17 (P0513R0, LWG 2817).
1333         * testsuite/20_util/hash/nullptr.cc: New test.
1334
1335         PR libstdc++/88125
1336         * config/abi/pre/gnu.ver (GLIBCXX_3.4.6): Remove unused duplicate
1337         pattern for std::basic_stringbuf::str().
1338
1339         * config/abi/pre/gnu.ver (GLIBCXX_3.4): Correct recent changes to
1340         basic_ostream::operator<< patterns.
1341
1342 2019-01-10  Jonathan Wakely  <jwakely@redhat.com>
1343
1344         * testsuite/27_io/filesystem/operations/last_write_time.cc: Fix
1345         test failures on targets with 32-bit time_t.
1346
1347         * include/bits/erase_if.h: Define __cpp_lib_erase_if.
1348         * include/std/deque: Likewise.
1349         * include/std/forward_list: Likewise.
1350         * include/std/list: Likewise.
1351         * include/std/string: Likewise.
1352         * include/std/vector: Likewise.
1353         * include/std/version: Likewise.
1354         * testsuite/21_strings/basic_string/erasure.cc: Test macro.
1355         * testsuite/23_containers/deque/erasure.cc: Likewise.
1356         * testsuite/23_containers/forward_list/erasure.cc: Likewise.
1357         * testsuite/23_containers/list/erasure.cc: Likewise.
1358         * testsuite/23_containers/map/erasure.cc: Likewise.
1359         * testsuite/23_containers/set/erasure.cc: Likewise.
1360         * testsuite/23_containers/unordered_map/erasure.cc: Likewise.
1361         * testsuite/23_containers/unordered_set/erasure.cc: Likewise.
1362         * testsuite/23_containers/vector/erasure.cc: Likewise.
1363
1364         * include/experimental/internet [AI_NUMERICSERV]
1365         (resolver_base::numeric_service): Define conditionally.
1366         * testsuite/experimental/net/internet/resolver/base.cc: Test it
1367         conditionally.
1368         * testsuite/experimental/net/internet/resolver/ops/lookup.cc:
1369         Likewise.
1370
1371 2019-01-10  Ville Voutilainen  <ville.voutilainen@gmail.com>
1372             Jonathan Wakely  <jwakely@redhat.com>
1373
1374         Implement LWG 2221
1375         * config/abi/pre/gnu.ver (GLIBCXX_3.4): Tighten patterns.
1376         (GLIBCXX_3.4.26): Add new exports.
1377         * include/Makefile.am: Add ostream-inst.cc. Move string-inst.cc to
1378         correct list of sources.
1379         * include/Makefile.in: Regenerate.
1380         * include/std/ostream (operator<<(nullptr_t)): New member function.
1381         * src/c++17/ostream-inst.cc: New file.
1382         * testsuite/27_io/basic_ostream/inserters_other/char/lwg2221.cc: New
1383         test.
1384
1385 2019-01-10  Jonathan Wakely  <jwakely@redhat.com>
1386
1387         * testsuite/util/testsuite_fs.h (nonexistent_path): Include name
1388         of the source file containing the caller.
1389         * testsuite/27_io/filesystem/iterators/directory_iterator.cc: Remove
1390         directories created by test.
1391         * testsuite/27_io/filesystem/iterators/recursive_directory_iterator.cc:
1392         Likewise.
1393         * testsuite/experimental/filesystem/iterators/directory_iterator.cc:
1394         Likewise.
1395         * testsuite/experimental/filesystem/iterators/
1396         recursive_directory_iterator.cc: Likewise.
1397
1398 2019-01-10  Jakub Jelinek  <jakub@redhat.com>
1399
1400         PR tree-optimization/88775
1401         * include/bits/stl_function.h (greater<_Tp*>::operator(),
1402         less<_Tp*>::operator(), greater_equal<_Tp*>::operator(),
1403         less_equal<_Tp*>::operator()): Use __builtin_is_constant_evaluated
1404         instead of __builtin_constant_p if available.  Don't bother with
1405         the pointer comparison in C++11 and earlier.
1406
1407 2019-01-09  Sandra Loosemore  <sandra@codesourcery.com>
1408
1409         PR other/16615
1410
1411         * include/ext/bitmap_allocator.h: Mechanically replace "can not"
1412         with "cannot".
1413
1414 2019-01-09  Jonathan Wakely  <jwakely@redhat.com>
1415
1416         * testsuite/libstdc++-prettyprinters/cxx17.cc: Fix expected output
1417         for filesystem::path. Give variables more distinctive names.
1418
1419         * include/std/optional (_Optional_payload_base::_M_copy_assign): New
1420         member function to perform non-trivial assignment.
1421         (_Optional_payload_base::_M_move_assign): Likewise.
1422         (_Optional_payload<T, true, false, true>::operator=)
1423         (_Optional_payload<T, true, true, false>::operator=)
1424         (_Optional_payload<T, true, false, false>::operator=): Call
1425         _M_copy_assign and/or _M_move_assign to do non-trivial assignments.
1426
1427         PR libstdc++/88204
1428         * testsuite/26_numerics/complex/operators/more_constexpr.cc: Do not
1429         test std::complex<long double> if long double format is IBM128.
1430         * testsuite/26_numerics/complex/requirements/more_constexpr.cc:
1431         Likewise.
1432
1433 2019-01-08  Jonathan Wakely  <jwakely@redhat.com>
1434
1435         * testsuite/libstdc++-prettyprinters/compat.cc: Test printer support
1436         for old std::unique_ptr layout.
1437         * testsuite/libstdc++-prettyprinters/cxx17.cc: Fix std::variant test
1438         to become valueless. Add filesystem::path tests.
1439
1440         PR libstdc++/87855
1441         * include/std/optional (_Optional_payload_base): New class template
1442         for common code hoisted from _Optional_payload specializations. Use
1443         a template for the union, to allow a partial specialization for
1444         types with non-trivial destructors. Add constructors for in-place
1445         initialization to the union.
1446         (_Optional_payload(bool, const _Optional_payload&)): Use _M_construct
1447         to perform non-trivial copy construction, instead of relying on
1448         non-standard copy elision in a delegating constructor.
1449         (_Optional_payload(bool, _Optional_payload&&)): Likewise for
1450         non-trivial move construction.
1451         (_Optional_payload): Derive from _Optional_payload_base and use it
1452         for everything except the non-trivial assignment operators, which are
1453         defined as needed.
1454         (_Optional_payload<false, C, M>): Derive from the specialization
1455         _Optional_payload<true, false, false> and add a destructor.
1456         (_Optional_base_impl::_M_destruct, _Optional_base_impl::_M_reset):
1457         Forward to corresponding members of _Optional_payload.
1458         (_Optional_base_impl::_M_is_engaged, _Optional_base_impl::_M_get):
1459         Hoist common members from _Optional_base.
1460         (_Optional_base): Make all members and base class public.
1461         (_Optional_base::_M_get, _Optional_base::_M_is_engaged): Move to
1462         _Optional_base_impl.
1463         * python/libstdcxx/v6/printers.py (StdExpOptionalPrinter): Add
1464         support for new std::optional layout.
1465         * testsuite/libstdc++-prettyprinters/compat.cc: New test.
1466
1467         PR libstdc++/88066
1468         * include/bits/locale_conv.h: Use <> for includes not "".
1469         * include/ext/random: Likewise.
1470         * include/ext/vstring.h: Likewise.
1471
1472 2019-01-08  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
1473
1474         * config/abi/pre/gnu.ver (GLIBCXX_3.4): Tighten existing patterns.
1475         (GLIBCXX_3.4.21): Likewise.
1476
1477 2019-01-08  Jonathan Wakely  <jwakely@redhat.com>
1478
1479         PR libstdc++/88749
1480         * src/filesystem/ops.cc (last_write_time): Fix preprocessor condition
1481         to match the one that controls whether utimbuf and utime are declared.
1482
1483 2019-01-07  Jonathan Wakely  <jwakely@redhat.com>
1484
1485         PR libstdc++/87787
1486         * include/bits/char_traits.h (char_traits::move): Do not pass null
1487         pointers to memmove.
1488         * include/bits/locale_facets.h
1489         (ctype<char>::widen(const char*, const char*, char*)): Do not
1490         pass null pointers to memcpy.
1491         (ctype<char>::narrow(const char*, const char*, char, char*)):
1492         Likewise.
1493         (ctype<char>::do_widen(const char*, const char*, char*)):
1494         Likewise.
1495         (ctype<char>::do_narrow(const char*, const char*, char, char*)):
1496         Likewise.
1497
1498         * doc/xml/manual/spine.xml: Update copyright years.
1499         * doc/xml/manual/status_cxx2017.xml: Adjust note about -lstdc++fs.
1500         * doc/xml/manual/using.xml: Remove requirement to link with -lstdc++fs
1501         for C++17 filesystem library.
1502         * doc/html/*: Regenerate.
1503
1504         * acinclude.m4 (GLIBCXX_CHECK_FILESYSTEM_DEPS): Check for truncate.
1505         * config.h.in: Regenerate.
1506         * config/abi/pre/gnu.ver: Order patterns for filesystem operations
1507         alphabetically and add missing entries for copy_symlink,
1508         hard_link_count, rename, and resize_file.
1509         * configure: Regenerate.
1510         * src/c++17/fs_ops.cc (resize_file): Remove #if so posix::truncate is
1511         used unconditionally.
1512         * src/filesystem/ops-common.h (__gnu_posix::truncate)
1513         [!_GLIBCXX_HAVE_TRUNCATE]: Provide fallback definition that only
1514         supports truncating to zero length.
1515         * testsuite/27_io/filesystem/operations/all.cc: New test.
1516         * testsuite/27_io/filesystem/operations/resize_file.cc: New test.
1517
1518 2019-01-06  Jonathan Wakely  <jwakely@redhat.com>
1519
1520         PR libstdc++/86756
1521         * acinclude.m4 (GLIBCXX_CHECK_FILESYSTEM_DEPS): Check for utime and
1522         lstat and define _GLIBCXX_USE_UTIME and _GLIBCXX_USE_LSTAT.
1523         * config.h.in: Regenerate.
1524         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Export symbols for
1525         remaining std::filesystem types and functions.
1526         * configure: Regenerate.
1527         * src/c++17/Makefile.am: Add C++17 filesystem sources.
1528         * src/c++17/Makefile.in: Regenerate.
1529         * src/c++17/cow-fs_dir.cc: Move src/filesystem/cow-std-dir.cc to
1530         here, and change name of included file.
1531         * src/c++17/cow-fs_ops.cc: Move src/filesystem/cow-std-ops.cc to
1532         here, and change name of included file.
1533         * src/c++17/fs_dir.cc: Move src/filesystem/std-dir.cc to here. Change
1534         path to dir-common.h.
1535         * src/c++17/fs_ops.cc: Move src/filesystem/std-ops.cc to here. Change
1536         path to ops-common.h. Disable -Wunused-parameter warnings.
1537         (internal_file_clock): Define unconditionally.
1538         [!_GLIBCXX_HAVE_SYS_STAT_H] (internal_file_clock::from_stat): Do not
1539         define.
1540         (do_copy_file, do_space): Move definitions to ops.common.h.
1541         (copy, file_size, hard_link_count, last_write_time, space): Only
1542         perform operation when _GLIBCXX_HAVE_SYS_STAT_H is defined, otherwise
1543         report an error.
1544         (last_write_time, read_symlink): Remove unused attributes from
1545         parameters.
1546         * src/filesystem/Makefile.am: Remove C++17 filesystem sources.
1547         * src/filesystem/Makefile.in: Regenerate.
1548         * src/filesystem/cow-std-dir.cc: Move to src/c++17/cow-fs_dir.cc.
1549         * src/filesystem/cow-std-ops.cc: Move to src/c++17/cow-fs_ops.cc.
1550         * src/filesystem/std-dir.cc: Move to src/c++17/fs_dir.cc.
1551         * src/filesystem/std-ops.cc: Move to src/c++17/fs_ops.cc.
1552         * src/filesystem/dir-common.h [!_GLIBCXX_HAVE_DIRENT_H]: Define
1553         dummy types and functions instead of using #error.
1554         * src/filesystem/dir.cc [!_GLIBCXX_HAVE_DIRENT_H]: Use #error.
1555         * src/filesystem/ops-common.h [!_GLIBCXX_USE_LSTAT] (lstat): Define
1556         in terms of stat.
1557         [!_GLIBCXX_HAVE_UNISTD_H]: Define dummy types and functions.
1558         (do_copy_file, do_space): Move definitions here from std-ops.cc.
1559         * src/filesystem/ops.cc: Adjust calls to do_copy_file and do_space
1560         to account for new namespace.
1561         * testsuite/27_io/filesystem/directory_entry/86597.cc: Remove
1562         -lstdc++fs from dg-options.
1563         * testsuite/27_io/filesystem/directory_entry/lwg3171.cc: Likewise.
1564         * testsuite/27_io/filesystem/file_status/1.cc: Likewise.
1565         * testsuite/27_io/filesystem/filesystem_error/cons.cc: Likewise.
1566         * testsuite/27_io/filesystem/filesystem_error/copy.cc: Likewise.
1567         * testsuite/27_io/filesystem/iterators/directory_iterator.cc:
1568         Likewise.
1569         * testsuite/27_io/filesystem/iterators/pop.cc: Likewise.
1570         * testsuite/27_io/filesystem/iterators/recursive_directory_iterator.cc:
1571         Likewise.
1572         * testsuite/27_io/filesystem/operations/absolute.cc: Likewise.
1573         * testsuite/27_io/filesystem/operations/canonical.cc: Likewise.
1574         * testsuite/27_io/filesystem/operations/copy.cc: Likewise.
1575         * testsuite/27_io/filesystem/operations/copy_file.cc: Likewise.
1576         * testsuite/27_io/filesystem/operations/create_directories.cc:
1577         Likewise.
1578         * testsuite/27_io/filesystem/operations/create_directory.cc: Likewise.
1579         * testsuite/27_io/filesystem/operations/create_symlink.cc: Likewise.
1580         * testsuite/27_io/filesystem/operations/current_path.cc: Likewise.
1581         * testsuite/27_io/filesystem/operations/equivalent.cc: Likewise.
1582         * testsuite/27_io/filesystem/operations/exists.cc: Likewise.
1583         * testsuite/27_io/filesystem/operations/file_size.cc: Likewise.
1584         * testsuite/27_io/filesystem/operations/is_empty.cc: Likewise.
1585         * testsuite/27_io/filesystem/operations/last_write_time.cc: Likewise.
1586         * testsuite/27_io/filesystem/operations/permissions.cc: Likewise.
1587         * testsuite/27_io/filesystem/operations/proximate.cc: Likewise.
1588         * testsuite/27_io/filesystem/operations/read_symlink.cc: Likewise.
1589         * testsuite/27_io/filesystem/operations/relative.cc: Likewise.
1590         * testsuite/27_io/filesystem/operations/remove.cc: Likewise.
1591         * testsuite/27_io/filesystem/operations/remove_all.cc: Likewise.
1592         * testsuite/27_io/filesystem/operations/space.cc: Likewise.
1593         * testsuite/27_io/filesystem/operations/status.cc: Likewise.
1594         * testsuite/27_io/filesystem/operations/symlink_status.cc: Likewise.
1595         * testsuite/27_io/filesystem/operations/temp_directory_path.cc:
1596         Likewise.
1597         * testsuite/27_io/filesystem/operations/weakly_canonical.cc: Likewise.
1598
1599
1600         PR libstdc++/86756
1601         * config/abi/pre/gnu.ver (GLIBCXX_3.4): Make various patterns for
1602         typeinfo and vtables less greedy.
1603         (GLIBCXX_3.4.26): Export symbols for std::filesystem::path.
1604         * src/c++17/Makefile.am: Add fs_path.cc and cow-fs_path.cc.
1605         * src/c++17/Makefile.in: Regenerate.
1606         * src/c++17/cow-fs_path.cc: Move src/filesystem/cow-std-path.cc to
1607         here, and change name of included file.
1608         * src/c++17/fs_path.cc: Move src/filesystem/std-path.cc to here.
1609         * src/filesystem/Makefile.am: Remove std-path.cc and cow-std-path.cc
1610         from sources.
1611         * src/filesystem/Makefile.in: Regenerate.
1612         * src/filesystem/cow-std-path.cc: Move to src/c++17/cow-fs_path.cc.
1613         * src/filesystem/std-path.cc: Move to src/c++17/fs_path.cc.
1614         * testsuite/27_io/filesystem/path/append/path.cc: Remove -lstdc++fs
1615         from dg-options and remove dg-require-filesystem-ts.
1616         * testsuite/27_io/filesystem/path/append/source.cc: Likewise.
1617         * testsuite/27_io/filesystem/path/assign/assign.cc: Likewise.
1618         * testsuite/27_io/filesystem/path/assign/copy.cc: Likewise.
1619         * testsuite/27_io/filesystem/path/compare/compare.cc: Likewise.
1620         * testsuite/27_io/filesystem/path/compare/lwg2936.cc: Likewise.
1621         * testsuite/27_io/filesystem/path/compare/path.cc: Likewise.
1622         * testsuite/27_io/filesystem/path/compare/strings.cc: Likewise.
1623         * testsuite/27_io/filesystem/path/concat/path.cc: Likewise.
1624         * testsuite/27_io/filesystem/path/concat/strings.cc: Likewise.
1625         * testsuite/27_io/filesystem/path/construct/80762.cc: Likewise.
1626         * testsuite/27_io/filesystem/path/construct/copy.cc: Likewise.
1627         * testsuite/27_io/filesystem/path/construct/default.cc: Likewise.
1628         * testsuite/27_io/filesystem/path/construct/format.cc: Likewise.
1629         * testsuite/27_io/filesystem/path/construct/locale.cc: Likewise.
1630         * testsuite/27_io/filesystem/path/construct/range.cc: Likewise.
1631         * testsuite/27_io/filesystem/path/construct/string_view.cc: Likewise.
1632         * testsuite/27_io/filesystem/path/decompose/extension.cc: Likewise.
1633         * testsuite/27_io/filesystem/path/decompose/filename.cc: Likewise.
1634         * testsuite/27_io/filesystem/path/decompose/parent_path.cc: Likewise.
1635         * testsuite/27_io/filesystem/path/decompose/relative_path.cc: Likewise.
1636         * testsuite/27_io/filesystem/path/decompose/root_directory.cc:
1637         Likewise.
1638         * testsuite/27_io/filesystem/path/decompose/root_name.cc: Likewise.
1639         * testsuite/27_io/filesystem/path/decompose/root_path.cc: Likewise.
1640         * testsuite/27_io/filesystem/path/decompose/stem.cc: Likewise.
1641         * testsuite/27_io/filesystem/path/generation/normal.cc: Likewise.
1642         * testsuite/27_io/filesystem/path/generation/normal2.cc: Likewise.
1643         * testsuite/27_io/filesystem/path/generation/proximate.cc: Likewise.
1644         * testsuite/27_io/filesystem/path/generation/relative.cc: Likewise.
1645         * testsuite/27_io/filesystem/path/generic/generic_string.cc: Likewise.
1646         * testsuite/27_io/filesystem/path/itr/components.cc: Likewise.
1647         * testsuite/27_io/filesystem/path/itr/traversal.cc: Likewise.
1648         * testsuite/27_io/filesystem/path/modifiers/clear.cc: Likewise.
1649         * testsuite/27_io/filesystem/path/modifiers/make_preferred.cc:
1650         Likewise.
1651         * testsuite/27_io/filesystem/path/modifiers/remove_filename.cc:
1652         Likewise.
1653         * testsuite/27_io/filesystem/path/modifiers/replace_extension.cc:
1654         Likewise.
1655         * testsuite/27_io/filesystem/path/modifiers/replace_filename.cc:
1656         Likewise.
1657         * testsuite/27_io/filesystem/path/modifiers/swap.cc: Likewise.
1658         * testsuite/27_io/filesystem/path/native/string.cc: Likewise.
1659         * testsuite/27_io/filesystem/path/nonmember/append.cc: Likewise.
1660         * testsuite/27_io/filesystem/path/nonmember/hash_value.cc: Likewise.
1661         * testsuite/27_io/filesystem/path/query/empty.cc: Likewise.
1662         * testsuite/27_io/filesystem/path/query/has_extension.cc: Likewise.
1663         * testsuite/27_io/filesystem/path/query/has_filename.cc: Likewise.
1664         * testsuite/27_io/filesystem/path/query/has_parent_path.cc: Likewise.
1665         * testsuite/27_io/filesystem/path/query/has_relative_path.cc: Likewise.
1666         * testsuite/27_io/filesystem/path/query/has_root_directory.cc:
1667         Likewise.
1668         * testsuite/27_io/filesystem/path/query/has_root_name.cc: Likewise.
1669         * testsuite/27_io/filesystem/path/query/has_root_path.cc: Likewise.
1670         * testsuite/27_io/filesystem/path/query/has_stem.cc: Likewise.
1671         * testsuite/27_io/filesystem/path/query/is_absolute.cc: Likewise.
1672         * testsuite/27_io/filesystem/path/query/is_relative.cc: Likewise.
1673
1674         PR libstdc++/87431
1675         * include/std/variant (_Variant_storage<true, _Types...>::_M_valid):
1676         Check is_trivially_copyable instead of is_scalar.
1677         (variant::emplace<N, Args>(Args&&...)): If construction of the new
1678         contained value can throw and its type is trivially copyable then
1679         construct into a temporary variant and move from it, to provide the
1680         strong exception safety guarantee.
1681         (variant::emplace<N, U, Args>(initializer_list<U>, Args&&...)):
1682         Likewise.
1683         * testsuite/20_util/variant/87431.cc: New test.
1684         * testsuite/20_util/variant/run.cc: Adjust test so that throwing
1685         conversion causes valueless state.
1686
1687         PR libstdc++/88607
1688         * testsuite/17_intro/headers/c++1998/charset.cc: New test.
1689         * testsuite/17_intro/headers/c++2011/charset.cc: New test.
1690         * testsuite/17_intro/headers/c++2014/charset.cc: New test.
1691         * testsuite/17_intro/headers/c++2017/charset.cc: New test.
1692         * testsuite/17_intro/headers/c++2020/charset.cc: New test.
1693
1694 2019-01-05  Jonathan Wakely  <jwakely@redhat.com>
1695
1696         * include/bits/fs_fwd.h (__file_clock): Define new clock.
1697         (file_time_type): Redefine in terms of __file_clock.
1698         * src/filesystem/ops-common.h (file_time): Add FIXME comment about
1699         overflow.
1700         * src/filesystem/std-ops.cc (is_set(perm_options, perm_options)): Give
1701         internal linkage.
1702         (internal_file_lock): New helper type for accessing __file_clock.
1703         (do_copy_file): Use internal_file_lock to convert system time to
1704         file_time_type.
1705         (last_write_time(const path&, error_code&)): Likewise.
1706         (last_write_time(const path&, file_time_type, error_code&)): Likewise.
1707
1708 2019-01-04  Jonathan Wakely  <jwakely@redhat.com>
1709
1710         * config/abi/pre/gnu.ver (GLIBCXX_3.4.21): Make patterns less greedy
1711         for const member functions of std::basic_string.
1712         (GLIBCXX_3.4.26): Export member functions of std::basic_string added
1713         in C++17.
1714         * include/bits/basic_string.h (basic_string(__sv_wrapper, const A&)):
1715         Make non-standard constructor private.
1716         [!_GLIBCXX_USE_CXX11_ABI] (basic_string(__sv_wrapper, const A&)):
1717         Likewise.
1718         * include/bits/basic_string.tcc (std::string, std::wstring): Declare
1719         explicit instantiations for C++17 as well as earlier dialects.
1720         * src/c++17/Makefile.am: Add new source files.
1721         * src/c++17/Makefile.in: Regenerate.
1722         * src/c++17/cow-string-inst.cc: New file defining explicit
1723         instantiations for basic_string member functions added in C++17.
1724         * src/c++17/string-inst.cc: Likewise.
1725
1726         * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Export allocator-extended
1727         copy/move constructors for old std::basic_string.
1728         * include/bits/basic_string.h [!_GLIBCXX_USE_CXX11_ABI]
1729         (basic_string::reference, basic_string::const_reference): Define
1730         as plain references for C++11 and later.
1731         (basic_string::basic_string()): Put constructor body outside
1732         preprocessor conditional groups.
1733         (basic_string::basic_string(basic_string&&)): Move _Alloc_hider
1734         instead of copying it.
1735         (basic_string::basic_string(const basic_string&, const _Alloc&)):
1736         Define.
1737         (basic_string::basic_string(basic_string&&, const _Alloc&)):
1738         Define.
1739         * include/bits/fs_path.h [!_GLIBCXX_USE_CXX11_ABI]: Remove special
1740         cases for old basic_string.
1741         * testsuite/21_strings/basic_string/cons/char/8.cc: Test
1742         allocator-extended constructors unconditionally. Add extra members to
1743         allocator type when using old string ABI.
1744         * testsuite/21_strings/basic_string/allocator/71964.cc: Enable test
1745         for old string ABI.
1746         * testsuite/21_strings/basic_string/cons/wchar_t/8.cc: Likewise.
1747
1748         * testsuite/23_containers/list/61347.cc: Avoid spurious failure when
1749         -fno-inline added to test flags.
1750
1751         * testsuite/21_strings/basic_string/requirements/
1752         explicit_instantiation/debug.cc: Remove XFAIL for old ABI.
1753
1754         * testsuite/27_io/filesystem/filesystem_error/copy.cc: Fix static
1755         assertion failures with old std::string ABI.
1756
1757         * include/bits/fs_path.h (path::_List::erase): Replace both overloads
1758         with ...
1759         (path::pop_back(), path::_M_erase_from(const_iterator)): New member
1760         functions that will only erase elements at the end.
1761         * src/filesystem/std-path.cc (path::_List::_Impl::pop_back()): Define.
1762         (path::_List::_Impl::_M_erase_from(const_iterator)): Define.
1763         (path::_List::operator=(const _List&)): Use _M_erase_from(p) instead
1764         of erase(p, end()).
1765         (path::_List::pop_back()): Define.
1766         (path::_List::_M_erase_from(const_iterator)): Define.
1767         (path::operator/=(const path&)): Use pop_back to remove last component
1768         and _M_erase_from to remove multiple components.
1769         (path::_M_append(basic_string_view<value_type>)): Likewise.
1770         (path::operator+=(const path&)): Likewise.
1771         (path::_M_concat(basic_string_view<value_type>)): Likewise.
1772         (path::remove_filename()): Likewise.
1773         (path::lexically_normal()): Use _List::_Impl iterators instead of
1774         path::iterator. Use pop_back to remove components from the end. Clear
1775         trailing filename, instead of using erase(const_iterator) to remove
1776         a non-final component.
1777         * testsuite/27_io/filesystem/path/generation/normal.cc: Test
1778         additional cases.
1779         * testsuite/27_io/filesystem/path/generation/normal2.cc: New test.
1780
1781         * src/filesystem/std-path.cc (path::operator+=(const path&)): Fix
1782         incorrect treatment of empty filename after trailing slash.
1783         * testsuite/27_io/filesystem/path/concat/path.cc: Test problem case.
1784
1785         * testsuite/21_strings/basic_string/modifiers/assign/char/
1786         move_assign_optim.cc: Avoid spurious failure when -fno-inline added
1787         to test flags.
1788         * testsuite/21_strings/basic_string/modifiers/assign/wchar_t/
1789         move_assign_optim.cc: Likewise.
1790
1791 2019-01-03  Jonathan Wakely  <jwakely@redhat.com>
1792             Jakub Jelinek  <jakub@redhat.com>
1793
1794         PR libstdc++/88607
1795         * include/experimental/memory: Replace UTF-8 quote characters.
1796         * include/std/future: Replace UTF-8 "em dash" characters.
1797
1798 2019-01-03  Jonathan Wakely  <jwakely@redhat.com>
1799
1800         PR libstdc++/88607
1801         * include/bits/forward_list.h: Replace UTF-8 "ligature fi" character.
1802         * include/debug/forward_list: Likewise.
1803         * include/experimental/bits/shared_ptr.h: Remove UTF-8 "section sign"
1804         character.
1805         * include/experimental/chrono: Likewise.
1806         * include/experimental/functional: Likewise.
1807         * include/experimental/ratio: Likewise.
1808         * include/experimental/system_error: Likewise.
1809         * include/experimental/tuple: Likewise.
1810         * include/experimental/type_traits: Likewise.
1811         * include/parallel/workstealing.h: Replace UTF-8 "en dash" character.
1812         * include/parallel/multiseq_selection.h: Likewise.
1813
1814         PR libstdc++/88681
1815         * config/abi/pre/gnu.ver: Add missing exports.
1816         * testsuite/22_locale/collate_byname/88681.cc: New test.
1817         * testsuite/22_locale/time_get/get/char/88681.cc: New test.
1818         * testsuite/22_locale/time_get/get/wchar_t/88681.cc: New test.
1819
1820 2019-01-02  Jonathan Wakely  <jwakely@redhat.com>
1821
1822         * testsuite/23_containers/map/cons/deduction.cc: Test deduction from
1823         initializer_list<value_type> and from input iterator ranges.
1824         * testsuite/23_containers/multimap/cons/deduction.cc: Likewise.
1825
1826         * testsuite/experimental/string_view/element_access/char/empty.cc:
1827         Fix year range in copyright header.
1828
1829 2019-01-02  Joel Brobecker  <brobecker@adacore.com>
1830
1831         * testsuite/21_strings/basic_string_view/element_access/char/empty.cc:
1832         Fix year range in copyright header.
1833
1834 2019-01-01  Jakub Jelinek  <jakub@redhat.com>
1835
1836         Update copyright years.
1837 \f
1838 Copyright (C) 2019 Free Software Foundation, Inc.
1839
1840 Copying and distribution of this file, with or without modification,
1841 are permitted in any medium without royalty provided the copyright
1842 notice and this notice are preserved.