libstdc++-v3/ChangeLog

   1 2020-04-24  Jonathan Wakely  <jwakely@redhat.com>
   2
   3         * include/experimental/executor (service_already_exists): Make default
   4         constructor public (LWG 3414).
   5         * testsuite/experimental/net/execution_context/make_service.cc: Check
   6         the service_already_exists can be default constructed.
   7
   8 2020-04-24  Kamlesh Kumar  <kamleshbhalui@gmail.com>
   9             Jonathan Wakely  <jwakely@redhat.com>
  10
  11         PR libstdc++/90415
  12         PR libstdc++/92156
  13         * include/std/any (any): Rename template parameters for consistency
  14         with the standard.
  15         (any::_Decay): Rename to _Decay_if_not_any.
  16         (any::any(T&&):: Remove is_constructible from constraints. Remove
  17         non-standard overload.
  18         (any::any(in_place_type_t<T>, Args&&...))
  19         (any::any(in_place_type_t<T>, initializer_list<U>, Args&&...))
  20         (any::emplace(Args&&...))
  21         (any::emplace(initializer_list<U>, Args&&...)):
  22         Use decay_t instead of _Decay.
  23         * testsuite/20_util/any/cons/90415.cc: New test.
  24         * testsuite/20_util/any/cons/92156.cc: New Test.
  25         * testsuite/20_util/any/misc/any_cast_neg.cc: Make dg-error directives
  26         more robust.
  27         * testsuite/20_util/any/modifiers/92156.cc: New test.
  28
  29 2020-04-23  Jonathan Wakely  <jwakely@redhat.com>
  30
  31         * doc/xml/manual/status_cxx2020.xml: Update C++20 status table.
  32         * doc/html/*: Regenerate.
  33
  34         * include/bits/stl_iterator.h (__cpp_lib_array_constexpr): Revert
  35         value for C++17 to 201803L because P0858R0 is supported for C++17.
  36         * include/std/version (__cpp_lib_array_constexpr): Likewise.
  37         * testsuite/23_containers/array/element_access/constexpr_c++17.cc:
  38         Check for value corresponding to P0031R0 features being tested.
  39         * testsuite/23_containers/array/requirements/constexpr_iter.cc:
  40         Check for value corresponding to P0858R0 features being tested.
  41
  42         * include/std/version (__cpp_lib_three_way_comparison): Define for
  43         freestanding builds.
  44
  45 2020-04-23  Thomas Rodgers  <rodgert@appliantology.com>
  46
  47         * include/experimental/net/executor (system_context): Mark
  48         system_context::system_context() = delete.
  49         * testsuite/experimental/net/executor/1.cc: Add new
  50         test to check system_context is not default constructible.
  51
  52 2020-04-23  Iain Sandoe  <iain@sandoe.co.uk>
  53
  54         * include/std/coroutine: Update the inline namespace to __n4861.
  55         Add the __cpp_lib_coroutine define, set to 201902L.
  56         * include/std/version: Add __cpp_lib_coroutine, set to 201902L.
  57
  58 2020-04-22  Jonathan Wakely  <jwakely@redhat.com>
  59
  60         * include/std/execution (__cpp_lib_execution): Define to indicate
  61         support for P0024R2 and P1001R2.
  62         * include/std/version (__cpp_lib_execution): Define.
  63         * testsuite/25_algorithms/pstl/feature_test.cc: Only test macro
  64         defined by <algorithm>, move other tests to new tests ...
  65         * testsuite/25_algorithms/pstl/feature_test-2.cc: New test.
  66         * testsuite/25_algorithms/pstl/feature_test-3.cc: New test.
  67         * testsuite/25_algorithms/pstl/feature_test-4.cc: New test.
  68         * testsuite/25_algorithms/pstl/feature_test-5.cc: New test.
  69
  70         * include/bits/stl_iterator.h (__cpp_lib_array_constexpr): Define
  71         different values for C++17 and C++20, to indicate different feature
  72         sets. Update value for C++20 to indicate P1032R1 support.
  73         * include/std/version (__cpp_lib_array_constexpr): Likewise.
  74         * testsuite/23_containers/array/comparison_operators/constexpr.cc:
  75         Check feature test macro.
  76         * testsuite/23_containers/array/element_access/constexpr_c++17.cc:
  77         New test.
  78         * testsuite/23_containers/array/requirements/constexpr_fill.cc: Check
  79         feature test macro.
  80         * testsuite/23_containers/array/requirements/constexpr_iter.cc: Test
  81         in C++17 mode and check feature test macro.
  82
  83         * include/std/utility (__cpp_lib_constexpr_algorithms): Do not define
  84         here.
  85         * testsuite/20_util/exchange/constexpr.cc: Do not expect macro to be
  86         defined by <utility>.
  87
  88         * include/std/functional (__cpp_lib_concepts): Update macro value to
  89         indicate P1964R2 support.
  90         * include/std/version (__cpp_lib_concepts): Likewise.
  91         * testsuite/std/concepts/1.cc: Adjust expected value.
  92         * testsuite/std/concepts/2.cc: Likewise.
  93
  94         * include/std/functional (__cpp_lib_constexpr_invoke): Rename to
  95         __cpp_lib_constexpr_functional.
  96         * include/std/version (__cpp_lib_constexpr_invoke): Likewise.
  97         * testsuite/20_util/function_objects/invoke/constexpr.cc: Adjust.
  98
  99         * include/bits/ptr_traits.h (__cpp_lib_constexpr_memory): Define to
 100         indicate P1006R1 support.
 101         (__cpp_lib_to_address): Define to indicate P0653R2 support.
 102         * include/bits/range_access.h (__cpp_lib_ssize): Define to indicate
 103         P1227R2 support.
 104         * include/bits/ranges_algo.h (__cpp_lib_shift): Define to indicate
 105         P0769R2 support.
 106         * include/std/atomic (__cpp_lib_atomic_float): Define to indicate
 107         P0020R6 support.
 108         * include/std/memory (__cpp_lib_assume_aligned): Define to indicate
 109         P1007R3 support.
 110         * include/std/memory_resource (__cpp_lib_polymorphic_allocator):
 111         Define to indicate P0339R6 support.
 112         * include/std/string_view (__cpp_lib_starts_ends_with): Define to
 113         indicate P0457R2 support.
 114         * include/std/type_traits (__cpp_lib_is_nothrow_convertible): Define
 115         to indicate P0758R1 support.
 116         (__cpp_lib_remove_cvref): Define to indicate P0550R2 support.
 117         (__cpp_lib_type_identity): Define to indicate P0887R1 support.
 118         * include/std/version (__cpp_lib_atomic_float)
 119         (__cpp_lib_is_nothrow_convertible, __cpp_lib_remove_cvref)
 120         (__cpp_lib_type_identity, __cpp_lib_assume_aligned)
 121         (__cpp_lib_constexpr_memory, __cpp_lib_polymorphic_allocator)
 122         (__cpp_lib_shift, __cpp_lib_ssize, __cpp_lib_starts_ends_with)
 123         (__cpp_lib_to_address): Define.
 124         * testsuite/20_util/to_address/1_neg.cc: Adjust dg-error line number.
 125
 126         * include/bits/stl_map.h (__cpp_lib_map_insertion): Remove old
 127         macro.
 128         * include/bits/unordered_map.h (__cpp_lib_unordered_map_insertion):
 129         Likewise.
 130         * include/std/version (__cpp_lib_map_insertion)
 131         (__cpp_lib_unordered_map_insertion): Remove.
 132
 133         * include/std/condition_variable (__cpp_lib_jthread): Remove
 134         redundant definition.
 135         * include/std/stop_token (__cpp_lib_jthread): Update macro value to
 136         indicate P1869R1 support.
 137         * include/std/version (__cpp_lib_jthread): Update value.
 138         * testsuite/30_threads/condition_variable_any/stop_token/1.cc: Check
 139         for updated macro value.
 140         * testsuite/30_threads/condition_variable_any/stop_token/2.cc:
 141         Likewise.
 142         * testsuite/30_threads/jthread/1.cc: Likewise.
 143         * testsuite/30_threads/jthread/2.cc: Likewise.
 144         * testsuite/30_threads/stop_token/1.cc: Likewise.
 145         * testsuite/30_threads/stop_token/2.cc: Likewise.
 146
 147         * testsuite/21_strings/basic_string/erasure.cc: Check for
 148         __cpp_lib_erase_if macro.
 149         * testsuite/23_containers/deque/erasure.cc: Add header name to #error
 150         messages.
 151         * testsuite/23_containers/forward_list/erasure.cc: Likewise.
 152         * testsuite/23_containers/list/erasure.cc: Likewise.
 153         * testsuite/23_containers/map/erasure.cc: Likewise.
 154         * testsuite/23_containers/set/erasure.cc: Likewise.
 155         * testsuite/23_containers/unordered_map/erasure.cc: Likewise.
 156         * testsuite/23_containers/unordered_set/erasure.cc: Likewise.
 157         * testsuite/23_containers/vector/erasure.cc: Likewise.
 158
 159 2020-04-21  Jonathan Wakely  <jwakely@redhat.com>
 160
 161         * include/bits/stl_iterator.h (__normal_iterator): Use synth-three-way
 162         to define operator<=>.
 163         * testsuite/24_iterators/normal_iterator/cmp_c++20.cc: New test.
 164
 165         * doc/Makefile.am (xml_sources_manual): Add missing XML files.
 166         * doc/Makefile.in: Regenerate.
 167         * doc/xml/manual/status_cxx1998.xml: Refer to "this section" instead
 168         of "this page".
 169         * doc/xml/manual/status_cxx2011.xml: Formatting and other corrections
 170         to the C++11 status table.
 171         * doc/xml/manual/status_cxx2014.xml: Replace list of C++14 feature
 172         proposals with table matching contents of the C++14 standard.
 173         * doc/xml/manual/status_cxx2017.xml: Add table matching contents of
 174         the C++17 standard.
 175         * doc/html/*: Regenerate.
 176
 177         PR c++/94149
 178         * include/std/type_traits (__is_nt_constructible_impl): Add partial
 179         specializations for bounded arrays with non-empty initializers.
 180         * testsuite/20_util/is_nothrow_constructible/value_c++20.cc: New test.
 181
 182 2020-04-20  Thomas Rodgers  <trodgers@redhat.com>
 183
 184         * testsuite/lib/libstdc++.exp: Add additional_flags=
 185         -DTBB_SUPRESS_DEPRECATED_MESSAGES=1 to suppress warnings when
 186         compiling with a newer Thread Building Blocks.
 187
 188 2020-04-20  Jonathan Wakely  <jwakely@redhat.com>
 189
 190         * testsuite/24_iterators/istreambuf_iterator/sentinel.cc: New test.
 191
 192         * testsuite/20_util/is_constructible/51185.cc: Make test class a
 193         non-aggregate so that the test verifies the same thing in all -std
 194         modes.
 195         * testsuite/20_util/is_constructible/value-2.cc: Adjust expected
 196         results for some types when paren-init for aggregates is supported.
 197
 198         * include/std/version (__cpp_lib_three_way_comparison): Update value.
 199         * libsupc++/compare (__cpp_lib_three_way_comparison): Likewise.
 200         (__detail::__synth3way): Add noexcept-specifier.
 201
 202         * include/bits/stl_map.h (map): Define operator<=> and remove
 203         operator< for C++20.
 204         * include/bits/stl_multimap.h (multimap): Likewise.
 205         * include/bits/stl_multiset.h (multiset): Likewise.
 206         * include/bits/stl_set.h (set): Likewise.
 207         * include/bits/stl_tree.h (_Rb_tree): Likewise.
 208         (_Rb_tree_iterator, _Rb_tree_const_iterator): Remove redundant
 209         operator!= for C++20.
 210         * include/debug/map.h (__gnu_debug::map): Define operator<=> for C++20.
 211         * include/debug/multimap.h (__gnu_debug::multimap): Likewise.
 212         * include/debug/multiset.h (__gnu_debug::multiset): Likewise.
 213         * include/debug/set.h (__gnu_debug::set): Likewise.
 214         * testsuite/23_containers/map/operators/cmp_c++20.cc: New test.
 215         * testsuite/23_containers/multimap/operators/cmp_c++20.cc: New test.
 216         * testsuite/23_containers/multiset/operators/cmp_c++20.cc: New test.
 217         * testsuite/23_containers/set/operators/cmp_c++20.cc: New test.
 218
 219 2020-04-20  Matthias Kretz  <kretz@kde.org>
 220
 221         * testsuite/lib/libstdc++.exp: Avoid illegal argument to verbose.
 222
 223 2020-04-19  Jonathan Wakely  <jwakely@redhat.com>
 224
 225         * include/bits/stl_queue.h (queue): Define operator<=> for C++20.
 226         * include/bits/stl_stack.h (stack): Likewise.
 227         * testsuite/23_containers/queue/cmp_c++20.cc: New test.
 228         * testsuite/23_containers/stack/cmp_c++20.cc: New test.
 229
 230         * include/bits/unordered_map.h (unordered_map, unordered_multimap):
 231         Remove redundant operator!= for C++20.
 232         * include/bits/unordered_set.h (unordered_set, unordered_multiset):
 233         Likewise.
 234         * include/debug/unordered_map (unordered_map, unordered_multimap):
 235         Likewise.
 236         * include/debug/unordered_set (unordered_set, unordered_multiset):
 237         Likewise.
 238
 239         PR other/94629
 240         * include/debug/formatter.h (_Error_formatter::_Parameter): Fix
 241         redundant assignment in constructor.
 242
 243 2020-04-18  Jonathan Wakely  <jwakely@redhat.com>
 244
 245         * include/std/chrono (duration, time_point): Define operator<=> and
 246         remove redundant operator!= for C++20.
 247         * testsuite/20_util/duration/comparison_operators/three_way.cc: New
 248         test.
 249         * testsuite/20_util/time_point/comparison_operators/three_way.cc: New
 250         test.
 251
 252         * testsuite/util/native_type/native_priority_queue.hpp: Use
 253         allocator_traits to rebind allocator.
 254
 255 2020-04-17  Jonathan Wakely  <jwakely@redhat.com>
 256
 257         * include/bits/forward_list.h (forward_list): Define operator<=> and
 258         remove redundant comparison operators for C++20.
 259         * include/bits/stl_bvector.h (vector<bool, Alloc>): Likewise.
 260         * include/bits/stl_deque.h (deque): Likewise.
 261         * include/bits/stl_iterator.h (__normal_iterator): Likewise.
 262         * include/bits/stl_list.h (list): Likewise.
 263         * include/bits/stl_vector.h (vector): Likewise.
 264         * include/debug/deque (__gnu_debug::deque): Likewise.
 265         * include/debug/forward_list (__gnu_debug::forward_list): Likewise.
 266         * include/debug/list (__gnu_debug::list): Likewise.
 267         * include/debug/safe_iterator.h (__gnu_debug::_Safe_iterator):
 268         Likewise.
 269         * include/debug/vector (__gnu_debug::vector): Likewise.
 270         * include/ext/pointer.h (__gnu_cxx::_Pointer_adapter): Define
 271         operator<=> for C++20.
 272         * testsuite/23_containers/deque/operators/cmp_c++20.cc: New test.
 273         * testsuite/23_containers/forward_list/cmp_c++20.cc: New test.
 274         * testsuite/23_containers/list/cmp_c++20.cc: New test.
 275         * testsuite/23_containers/vector/bool/cmp_c++20.cc: New test.
 276         * testsuite/23_containers/vector/cmp_c++20.cc: New test.
 277
 278         * include/bits/basic_string.h (basic_string): Define operator<=> and
 279         remove redundant comparison operators for C++20.
 280         * include/bits/char_traits.h (__gnu_cxx::char_traits, char_traits):
 281         Add comparison_category members.
 282         (__detail::__char_traits_cmp_cat): New helper to get comparison
 283         category from char traits class.
 284         * include/bits/regex.h (regex_traits::_RegexMask::operator!=): Do not
 285         define for C++20.
 286         (sub_match): Define operator<=> and remove redundant comparison
 287         operators for C++20.
 288         (match_results): Remove redundant operator!= for C++20.
 289         * include/std/string_view (basic_string_view): Define operator<=> and
 290         remove redundant comparison operators for C++20.
 291         * testsuite/21_strings/basic_string/operators/char/cmp_c++20.cc: New
 292         test.
 293         * testsuite/21_strings/basic_string/operators/wchar_t/cmp_c++20.cc:
 294         New test.
 295         * testsuite/21_strings/basic_string_view/operations/copy/char/
 296         constexpr.cc: Initialize variable.
 297         * testsuite/21_strings/basic_string_view/operations/copy/wchar_t/
 298         constexpr.cc: Likewise.
 299         * testsuite/21_strings/basic_string_view/operators/char/2.cc: Add
 300         dg-do directive and remove comments showing incorrect signatures.
 301         * testsuite/21_strings/basic_string_view/operators/wchar_t/2.cc:
 302         Likewise.
 303         * testsuite/21_strings/basic_string_view/operators/char/cmp_c++20.cc:
 304         New test.
 305         * testsuite/21_strings/basic_string_view/operators/wchar_t/cmp_c++20.cc:
 306         New test.
 307         * testsuite/28_regex/sub_match/compare_c++20.cc: New test.
 308
 309 2020-04-16  Jonathan Wakely  <jwakely@redhat.com>
 310
 311         * testsuite/20_util/unsynchronized_pool_resource/allocate.cc: Remove
 312         name of unused parameter.
 313
 314 2020-04-15  Jonathan Wakely  <jwakely@redhat.com>
 315
 316         * include/bits/fs_dir.h (file_status): Define operator== for C++20.
 317         (directory_entry): Define operator<=> and remove redundant comparison
 318         operators for C++20.
 319         * include/bits/fs_fwd.h (space_info): Define operator== for C++20.
 320         * include/bits/fs_path.h (path): Define operator<=> and remove
 321         redundant comparison operators for C++20.
 322         * testsuite/27_io/filesystem/path/compare/compare.cc: Fix comment.
 323         * testsuite/27_io/filesystem/path/compare/lwg2936.cc: Likewise.
 324         * testsuite/27_io/filesystem/path/compare/path.cc: Likewise.
 325         * testsuite/27_io/filesystem/path/compare/strings.cc: Likewise.
 326
 327         * include/bits/allocator.h (operator!=): Do not define for C++20.
 328         * include/bits/locale_classes.h (operator!=): Likewise.
 329         * include/bits/std_function.h (operator==(nullptr_t, const function&))
 330         (operator!=(const function&, nullptr_t))
 331         (operator!=(nullptr_t, const function&)): Likewise.
 332         * include/ext/bitmap_allocator.h (operator!=): Likewise.
 333         * include/ext/debug_allocator.h (operator!=): Likewise.
 334         * include/ext/extptr_allocator.h (operator!=): Likewise.
 335         * include/ext/malloc_allocator.h (operator!=): Likewise.
 336         * include/ext/mt_allocator.h (operator!=): Likewise.
 337         * include/ext/new_allocator.h (operator!=): Likewise.
 338         * include/ext/pool_allocator.h (operator!=): Likewise.
 339         * include/ext/throw_allocator.h (operator!=): Likewise.
 340         * include/std/bitset (bitset::operator!=): Likewise.
 341         * include/std/memory_resource (operator!=): Likewise.
 342         * include/std/scoped_allocator (operator!=): Likewise.
 343
 344         * include/std/typeindex (operator<=>): Define for C++20.
 345         * testsuite/20_util/typeindex/comparison_operators_c++20.cc: New test.
 346
 347 2020-04-14  Jonathan Wakely  <jwakely@redhat.com>
 348
 349         * libsupc++/compare (compare_three_way): Fix constraint so that
 350         BUILTIN-PTR-THREE-WAY does not require three_way_comparable_with.
 351         * testsuite/18_support/comparisons/object/builtin-ptr-three-way.cc:
 352         New test.
 353
 354         PR libstdc++/94562
 355         * include/bits/shared_ptr.h (operator<=>): Define for C++20.
 356         * include/bits/shared_ptr_base.h (operator<=>): Likewise.
 357         * include/bits/unique_ptr.h (operator<=>): Add inline specifier.
 358         * testsuite/20_util/shared_ptr/comparison/cmp_c++20.cc: New test.
 359         * testsuite/20_util/shared_ptr/comparison/less.cc: Do not expect
 360         std::less<A*> to be used when comparing std::shared_ptr<A> objects in
 361         C++20.
 362
 363         PR libstdc++/94565
 364         * libsupc++/compare (__unspec): Add noexcept-specifier to constructor.
 365         * testsuite/18_support/comparisons/categories/94565.cc: New test.
 366
 367 2020-04-13  Iain Sandoe  <iain@sandoe.co.uk>
 368
 369         * include/std/coroutine: Update coroutines builtin define,
 370         per n4861.
 371
 372 2020-04-09  Jonathan Wakely  <jwakely@redhat.com>
 373
 374         * libsupc++/compare (compare_three_way): Fix noexcept-specifier.
 375         (strong_order, weak_order, partial_order): Replace uses of <=> with
 376         compare_three_way function object (LWG 3324).
 377         * testsuite/18_support/comparisons/algorithms/partial_order.cc: Add
 378         equality operator so that X satisfies three_way_comparable.
 379         * testsuite/18_support/comparisons/algorithms/strong_order.cc:
 380         Likewise.
 381         * testsuite/18_support/comparisons/algorithms/weak_order.cc: Likewise.
 382
 383         * include/bits/unique_ptr.h (operator<=>): Define for C++20.
 384         * testsuite/20_util/default_delete/48631_neg.cc: Adjust dg-error line.
 385         * testsuite/20_util/default_delete/void_neg.cc: Likewise.
 386         * testsuite/20_util/unique_ptr/comparison/compare.cc: New test.
 387         * testsuite/20_util/unique_ptr/comparison/compare_c++20.cc: New test.
 388
 389 2020-04-08  Jonathan Wakely  <jwakely@redhat.com>
 390
 391         * include/bits/slice_array.h (operator==(const slice&, const slice&)):
 392         Define for C++20.
 393         * include/std/complex (operator==(const T&, const complex<T>&))
 394         (operator!=(const complex<T>&, const complex<T>&))
 395         (operator!=(const complex<T>&, const T&))
 396         (operator!=(const T&, const complex<T>&)): Do not declare for C++20.
 397         * testsuite/26_numerics/slice/compare.cc: New test.
 398
 399         * include/std/charconv (to_chars_result, from_chars_result): Add
 400         defaulted equality comparisons for C++20.
 401         * testsuite/20_util/from_chars/compare.cc: New test.
 402         * testsuite/20_util/to_chars/compare.cc: New test.
 403
 404 2020-04-07  Jonathan Wakely  <jwakely@redhat.com>
 405
 406         PR libstdc++/94520
 407         * include/std/charconv (__integer_to_chars_result_type)
 408         (__integer_from_chars_result_type): Use __or_ instead of __or_v_ to
 409         allow use in C++14.
 410         * testsuite/20_util/from_chars/1.cc: Run test as C++14 and replace
 411         use of std::string_view with std::string.
 412         * testsuite/20_util/from_chars/2.cc: Likewise.
 413         * testsuite/20_util/to_chars/1.cc: Likewise.
 414         * testsuite/20_util/to_chars/2.cc: Likewise.
 415
 416 2020-04-06  Jonathan Wakely  <jwakely@redhat.com>
 417
 418         PR libstdc++/94498
 419         * include/bits/char_traits.h (__gnu_cxx::char_traits::move): Make it
 420         usable in constant expressions for C++20.
 421         (__gnu_cxx::char_traits::copy, __gnu_cxx::char_traits::assign): Add
 422         _GLIBCXX20_CONSTEXPR.
 423         (std::char_traits<char>, std::char_traits<wchar_t>)
 424         (std::char_traits<char8_t>): Make move, copy and assign usable in
 425         constant expressions for C++20.
 426         (std::char_traits<char16_t>, std::char_traits<char32_t>): Make move
 427         and copy usable in constant expressions for C++20.
 428         * include/std/string_view (basic_string_view::copy): Add
 429         _GLIBCXX20_CONSTEXPR.
 430         * testsuite/21_strings/basic_string_view/operations/copy/char/
 431         constexpr.cc: New test.
 432         * testsuite/21_strings/basic_string_view/operations/copy/wchar_t/
 433         constexpr.cc: New test.
 434
 435 2020-04-05  Gerald Pfeifer  <gerald@pfeifer.com>
 436
 437         * doc/xml/manual/appendix_contributing.xml: Refer to Git
 438         documentation instead of Subversion.  Switch to https.
 439         * doc/html/manual/appendix_contributing.html: Regenerate.
 440
 441 2020-04-03  Jonathan Wakely  <jwakely@redhat.com>
 442
 443         PR libstdc++/93960
 444         * include/bits/ptr_traits.h (__to_address): Add special case for debug
 445         iterators, to avoid dereferenceable check.
 446         * testsuite/20_util/to_address/1_neg.cc: Adjust dg-error line number.
 447         * testsuite/20_util/to_address/debug.cc: New test.
 448
 449 2020-04-01  Andrea Corallo  <andrea.corallo@arm.com>
 450
 451         * testsuite/experimental/net/execution_context/use_service.cc:
 452         Require pthread and gthreads.
 453
 454 2020-04-01  Gerald Pfeifer  <gerald@pfeifer.com>
 455
 456         * doc/xml/manual/appendix_free.xml: Move "free books" list from
 457         fsf.org to gnu.org.
 458         * doc/html/manual/appendix_free.html: Regenerate.
 459
 460 2020-03-31  Ville Voutilainen  <ville.voutilainen@gmail.com>
 461
 462         Library-side tests for parenthesized aggregate init
 463
 464         PR c++/92878
 465         PR c++/92947
 466
 467         * testsuite/20_util/allocator_traits/members/92878_92947.cc: New.
 468         * testsuite/20_util/any/assign/92878_92947.cc: Likewise.
 469         * testsuite/20_util/any/cons/92878_92947.cc: Likewise.
 470         * testsuite/20_util/is_constructible/92878_92947.cc: Likewise.
 471         * testsuite/20_util/optional/assignment/92878_92947.cc: Likewise.
 472         * testsuite/20_util/optional/cons/92878_92947.cc: Likewise.
 473         * testsuite/20_util/pair/cons/92878_92947.cc: Likewise.
 474         * testsuite/20_util/shared_ptr/creation/92878_92947.cc: Likewise.
 475         * testsuite/20_util/specialized_algorithms/construct_at/92878_92947.cc:
 476         Likewise.
 477         * testsuite/20_util/unique_ptr/creation/92878_92947.cc: Likewise.
 478         * testsuite/20_util/uses_allocator/92878_92947.cc: Likewise.
 479         * testsuite/20_util/variant/92878_92947.cc: Likewise.
 480         * testsuite/23_containers/deque/modifiers/emplace/92878_92947.cc:
 481         Likewise.
 482         * testsuite/23_containers/forward_list/modifiers/92878_92947.cc:
 483         Likewise.
 484         * testsuite/23_containers/list/modifiers/emplace/92878_92947.cc:
 485         Likewise.
 486         * testsuite/23_containers/map/modifiers/emplace/92878_92947.cc:
 487         Likewise.
 488         * testsuite/23_containers/multimap/modifiers/emplace/92878_92947.cc:
 489         Likewise.
 490         * testsuite/23_containers/multiset/modifiers/emplace/92878_92947.cc:
 491         Likewise.
 492         * testsuite/23_containers/priority_queue/92878_92947.cc: Likewise.
 493         * testsuite/23_containers/queue/92878_92947.cc: Likewise.
 494         * testsuite/23_containers/set/modifiers/emplace/92878_92947.cc:
 495         Likewise.
 496         * testsuite/23_containers/stack/92878_92947.cc: Likewise.
 497         * testsuite/23_containers/unordered_map/modifiers/92878_92947.cc:
 498         Likewise.
 499         * testsuite/23_containers/unordered_multimap/modifiers/92878_92947.cc:
 500         Likewise.
 501         * testsuite/23_containers/unordered_multiset/modifiers/92878_92947.cc:
 502         Likewise.
 503         * testsuite/23_containers/unordered_set/modifiers/92878_92947.cc:
 504         Likewise.
 505         * testsuite/23_containers/vector/modifiers/emplace/92878_92947.cc:
 506         Likewise.
 507
 508 2020-03-28  Jonathan Wakely  <jwakely@redhat.com>
 509
 510         * testsuite/20_util/is_constructible/value-2.cc: Fix test to account
 511         for changes due to parenthesized aggregate-initialization in C++20.
 512         * testsuite/20_util/time_point/cons/81468.cc: Fix test to not clash
 513         with std::chrono::sys_time in C++20.
 514
 515         * include/bits/stl_iterator.h (reverse_iterator): Use requires-clause
 516         to constrain C++20 versions of comparison operators. Fix backwards
 517         logic of relational operators.
 518         (move_iterator): Use requires-clause to constrain comparison operators
 519         in C++20. Do not declare non-standard same-type overloads for C++20.
 520         * testsuite/24_iterators/move_iterator/rel_ops_c++20.cc: Check result
 521         of comparisons and check using greedy_ops type.
 522         * testsuite/24_iterators/reverse_iterator/rel_ops_c++20.cc: Likewise.
 523         * testsuite/24_iterators/move_iterator/greedy_ops.cc: Remove redundant
 524         main function from compile-only test.
 525         * testsuite/24_iterators/reverse_iterator/greedy_ops.cc: Likewise.
 526
 527 2020-03-27  Jonathan Wakely  <jwakely@redhat.com>
 528
 529         * include/bits/range_cmp.h (__cpp_lib_ranges): Define.
 530         * include/bits/stl_iterator.h: Check value of __cpp_concepts so that
 531         C++20 concepts are required.
 532         * include/bits/stl_iterator_base_types.h: Likewise.
 533         * include/std/concepts: Likewise.
 534         * include/std/version: Likewise.
 535         * testsuite/std/ranges/headers/ranges/synopsis.cc: Check feature test
 536         macro.
 537
 538         * include/bits/stl_iterator.h (reverse_iterator::iterator_concept)
 539         (reverse_iterator::iterator_category): Define for C++20.
 540         (reverse_iterator): Define comparison operators correctly for C++20.
 541         (__normal_iterator): Add constraints to comparison operators for C++20.
 542         (move_iterator::operator++(int)) [__cpp_lib_concepts]: Define new
 543         overload for input iterators.
 544         (move_iterator): Add constraints to comparison operators for C++20.
 545         Define operator<=> for C++20.
 546         * testsuite/24_iterators/move_iterator/input_iterator.cc: New test.
 547         * testsuite/24_iterators/move_iterator/move_only.cc: New test.
 548         * testsuite/24_iterators/move_iterator/rel_ops_c++20.cc: New test.
 549         * testsuite/24_iterators/reverse_iterator/rel_ops_c++20.cc: New test.
 550
 551         * include/bits/iterator_concepts.h (__detail::__decay_copy)
 552         (__detail::__member_begin, __detail::__adl_begin): Move here from
 553         <bits/range_access.h>.
 554         (__detail::__ranges_begin, __detail::__range_iter_t): Define.
 555         * bits/range_access.h (__cust_access::__decay_copy)
 556         (__cust_access::__member_begin, __cust_access::__adl_begin): Move to
 557         <bits/iterator_concepts.h>.
 558         (ranges::iterator_t): Use __detail::__range_iter_t.
 559         * include/bits/stl_iterator.h (back_insert_iterator): Simplify
 560         conditional compilation. Add _GLIBCXX20_CONSTEXPR to all members.
 561         (front_insert_iterator): Likewise.
 562         (insert_iterator): Implement changes from P0896R4 for C++20.
 563         * testsuite/24_iterators/back_insert_iterator/constexpr.cc: New test.
 564         * testsuite/24_iterators/front_insert_iterator/constexpr.cc: New test.
 565         * testsuite/24_iterators/headers/iterator/synopsis_c++17.cc: Adjust
 566         for inclusion in synopsis_c++20.cc which expects different signatures
 567         for some function templates.
 568         * testsuite/24_iterators/insert_iterator/constexpr.cc: New test.
 569
 570         * include/std/type_traits (__is_array_convertible): Move definition
 571         to immediately after is_convertible.
 572
 573 2020-03-26  Jonathan Wakely  <jwakely@redhat.com>
 574
 575         * include/std/chrono (chrono::days, chrono::weeks, chrono::years)
 576         (chrono::months, chrono::sys_days, chrono::local_t)
 577         (chrono::local_time, chrono::local_seconds, chrono::local_days):
 578         Define for C++20.
 579         (chrono::time_point): Add missing static assert.
 580         * testsuite/20_util/time_point/requirements/duration_neg.cc: New test.
 581         * testsuite/std/time/clock/file/overview.cc: New test.
 582         * testsuite/std/time/clock/file/members.cc: New test.
 583         * testsuite/std/time/syn_c++20.cc: New test.
 584
 585 2020-03-25  Mike Crowe  <mac@mcrowe.com>
 586
 587         * testsuite/30_threads/shared_timed_mutex/try_lock_until/1.cc: New
 588         test.
 589         * testsuite/30_threads/shared_timed_mutex/try_lock_until/2.cc: New
 590         test.
 591
 592 2020-03-25  Jonathan Wakely  <jwakely@redhat.com>
 593
 594         * include/bits/fs_fwd.h (filesystem::__file_clock): Move to ...
 595         * include/std/chrono (filesystem::__file_clock): Here.
 596         (filesystem::__file_clock::from_sys, filesystem::__file_clock::to_sys):
 597         Define public member functions for C++20.
 598         (is_clock, is_clock_v): Define traits for C++20.
 599         * include/std/condition_variable (condition_variable::wait_until): Add
 600         check for valid clock.
 601         * include/std/future (_State_baseV2::wait_until): Likewise.
 602         * include/std/mutex (__timed_mutex_impl::_M_try_lock_until): Likewise.
 603         * include/std/shared_mutex (shared_timed_mutex::try_lock_shared_until):
 604         Likewise.
 605         * include/std/thread (this_thread::sleep_until): Likewise.
 606         * testsuite/30_threads/condition_variable/members/2.cc: Qualify
 607         slow_clock with new namespace.
 608         * testsuite/30_threads/condition_variable/members/clock_neg.cc: New
 609         test.
 610         * testsuite/30_threads/condition_variable_any/members/clock_neg.cc:
 611         New test.
 612         * testsuite/30_threads/future/members/clock_neg.cc: New test.
 613         * testsuite/30_threads/recursive_timed_mutex/try_lock_until/3.cc:
 614         Qualify slow_clock with new namespace.
 615         * testsuite/30_threads/recursive_timed_mutex/try_lock_until/
 616         clock_neg.cc: New test.
 617         * testsuite/30_threads/shared_future/members/clock_neg.cc: New
 618         test.
 619         * testsuite/30_threads/shared_lock/locking/clock_neg.cc: New test.
 620         * testsuite/30_threads/shared_timed_mutex/try_lock_until/clock_neg.cc:
 621         New test.
 622         * testsuite/30_threads/timed_mutex/try_lock_until/3.cc: Qualify
 623         slow_clock with new namespace.
 624         * testsuite/30_threads/timed_mutex/try_lock_until/4.cc: Likewise.
 625         * testsuite/30_threads/timed_mutex/try_lock_until/clock_neg.cc: New
 626         test.
 627         * testsuite/30_threads/unique_lock/locking/clock_neg.cc: New test.
 628         * testsuite/std/time/traits/is_clock.cc: New test.
 629         * testsuite/util/slow_clock.h (slow_clock): Move to __gnu_test
 630         namespace.
 631
 632 2020-03-21  Jonathan Wakely  <jwakely@redhat.com>
 633
 634         PR libstdc++/93245
 635         * include/experimental/bits/fs_path.h (path::generic_string<C,T,A>()):
 636         * testsuite/experimental/filesystem/path/generic/generic_string.cc:
 637         Improve test coverage.
 638
 639         PR libstdc++/94242
 640         * include/bits/fs_path.h (path::_S_str_convert): Replace first
 641         parameter with basic_string_view so that strings with different
 642         allocators can be accepted.
 643         (path::generic_string<C,T,A>()): Use basic_string object that uses the
 644         right allocator type.
 645         * testsuite/27_io/filesystem/path/generic/94242.cc: New test.
 646         * testsuite/27_io/filesystem/path/generic/generic_string.cc: Improve
 647         test coverage.
 648
 649 2020-03-18  Jonathan Wakely  <jwakely@redhat.com>
 650
 651         PR libstdc++/94033
 652         * include/std/type_traits (__is_nt_default_constructible_atom): Remove.
 653         (__is_nt_default_constructible_impl): Remove.
 654         (__is_nothrow_default_constructible_impl): Remove.
 655         (__is_nt_constructible_impl): Add bool template parameter. Adjust
 656         partial specializations.
 657         (__is_nothrow_constructible_impl): Replace class template with alias
 658         template.
 659         (is_nothrow_default_constructible): Derive from alias template
 660         __is_nothrow_constructible_impl instead of
 661         __is_nothrow_default_constructible_impl.
 662         * testsuite/20_util/is_nothrow_constructible/94003.cc: New test.
 663
 664         * include/std/stop_token (stop_token::_Stop_state_ref): Define
 665         comparison operators explicitly if the compiler won't synthesize them.
 666
 667         * include/bits/stl_algobase.h (__lexicographical_compare_aux): Check
 668         __cpp_lib_concepts before using iter_reference_t.
 669         * include/bits/stream_iterator.h (istream_iterator): Check
 670         __cpp_lib_concepts before using default_sentinel_t.
 671         * include/bits/streambuf_iterator.h (istreambuf_iterator): Likewise.
 672
 673         PR libstdc++/94203
 674         * include/experimental/executor (executor::executor(Executor)): Call
 675         make_shared directly instead of _M_create. Create _Tgt1 object.
 676         (executor::executor(allocator_arg_t, const ProtoAlloc&, Executor)):
 677         Call allocate_shared directly instead of _M_create. Create _Tgt2
 678         object.
 679         (executor::target_type): Add cast needed for new _Tgt interface.
 680         (executor::target): Define when RTTI is disabled. Use _Tgt::_M_func.
 681         (executor::_Tgt): Define the same interface whether RTTI is enabled or
 682         not.
 683         (executor::_Tgt::target_type, executor::_Tgt::target): Do not use
 684         std::type_info in the interface.
 685         (executor::_Tgt::_M_func): Add data member.
 686         (executor::_TgtImpl): Replace with _Tgt1 and _Tgt2 class templates.
 687         (executor::_Tgt1::_S_func): Define function to access target without
 688         depending on RTTI.
 689         (executor::_M_create): Remove.
 690         (operator==, operator!=): Simplify comparisons for executor.
 691         * include/experimental/socket (is_error_code_enum<socket_errc>):
 692         Define specialization before use.
 693         * testsuite/experimental/net/executor/1.cc: New test.
 694
 695 2020-03-16  Jonathan Wakely  <jwakely@redhat.com>
 696
 697         PR libstdc++/94199
 698         * include/experimental/executor (service_already_exists): Add default
 699         constructor. Declare make_service to be a friend.
 700         * testsuite/experimental/net/execution_context/make_service.cc: New
 701         test.
 702
 703 2020-03-12  Jonathan Wakely  <jwakely@redhat.com>
 704
 705         * testsuite/tr1/8_c_compatibility/cstdlib/functions.cc: Do not pass
 706         a null pointer to functions with nonnull(1) attribute.
 707
 708 2020-03-11  Patrick Palka  <ppalka@redhat.com>
 709
 710         * include/std/ranges (split_view::_OuterIter::_OuterIter): Typo fix,
 711         'address' -> 'std::__addressof'.
 712         * testsuite/std/ranges/adaptors/split.cc: Test taking the split_view of
 713         a non-forward input_range.
 714         * testsuite/util/testsuite_iterators.h (output_iterator_wrapper): Make
 715         default constructor protected instead of deleted, like with
 716         input_iterator_wrapper.
 717         (test_range::iterator): Add comment explaining that this type is used
 718         only when the underlying wrapper is input_iterator_wrapper or
 719         output_iterator_wrapper.  Remove delegating defaulted constructor so
 720         that the inherited default constructor is used instead.
 721
 722         LWG 3286 ranges::size is not required to be valid after a call to
 723         ranges::begin on an input range
 724         * include/std/ranges (subrange::subrange): Split single-argument
 725         constructor into two, one constrained by _S_store_size and another by
 726         !_S_store_size.
 727         (take_view::begin): Call size() before calling ranges::begin(_M_base).
 728         * testsuite/std/ranges/adaptors/lwg3286.cc: New test.
 729         * testsuite/std/ranges/subrange/lwg3286.cc: New test.
 730
 731 2020-03-10  Jonathan Wakely  <jwakely@redhat.com>
 732
 733         * include/std/ranges (split_view::_OuterIter::__at_end): Use __current
 734         instead of _M_current.
 735         (split_view::_OuterIter::operator++): Likewise.
 736
 737         * include/std/ranges (transform_view::_Iterator::__iter_move): Remove.
 738         (transform_view::_Iterator::operator*): Add noexcept-specifier.
 739         (transform_view::_Iterator::iter_move): Inline __iter_move body here.
 740         (split_view::_OuterIter::__current): Add noexcept.
 741         (split_view::_InnerIter::__iter_swap): Remove.
 742         (split_view::_InnerIter::__iter_move): Remove.
 743         (split_view::_InnerIter::_M_i_current): New accessors.
 744         (split_view::_InnerIter::__at_end): Use _M_i_current().
 745         (split_view::_InnerIter::operator*): Likewise.
 746         (split_view::_InnerIter::operator++): Likewise.
 747         (iter_move(const _InnerIter&)): Likewise.
 748         (iter_swap(const _InnerIter&, const _InnerIter&)): Likewise.
 749         * testsuite/std/ranges/adaptors/split.cc: Check noexcept-specifier
 750         for iter_move and iter_swap on split_view's inner iterator.
 751
 752         PR c++/94117
 753         * include/std/ranges (ranges::transform_view::_Iterator::iter_move):
 754         Change expression in noexcept-specifier to match function body.
 755
 756         * testsuite/23_containers/unordered_set/allocator/ext_ptr.cc: Add
 757         comment explaining multiple dg-do directives.
 758         * testsuite/24_iterators/ostream_iterator/1.cc: Fix do-do directive
 759         so test is run as well as compiled.
 760
 761 2020-03-09  Jonathan Wakely  <jwakely@redhat.com>
 762
 763         PR libstdc++/94063
 764         * src/c++17/fs_path.cc (path::operator+=(const path&)): Add kluge to
 765         handle concatenations that change the type of the first component.
 766         (path::operator+=(basic_string_view<value_type>)): Likewise.
 767         * testsuite/27_io/filesystem/path/concat/94063.cc: New test.
 768
 769 2020-03-06  Patrick Palka  <ppalka@redhat.com>
 770
 771         * include/std/ranges (join_view::_Sentinel<_Const>): Befriend
 772         join_view::_Sentinel<!_Const>.
 773         * testsuite/std/ranges/adaptors/join.cc: Augment test.
 774
 775         PR libstdc++/93978
 776         * include/bits/range_access.h (__cust_access::_Empty::operator()):
 777         Declare return type to be bool instead of auto.
 778         * testsuite/std/ranges/adaptors/93978.cc: New test.
 779
 780 2020-03-06  Jonathan Wakely  <jwakely@redhat.com>
 781
 782         PR libstdc++/94069
 783         * include/std/shared_mutex [!PTHREAD_RWLOCK_INITIALIZER]
 784         (__shared_mutex_pthread::__shared_mutex_pthread()): Remove incorrect
 785         second argument to __glibcxx_rwlock_init.
 786         * testsuite/30_threads/shared_timed_mutex/94069.cc: New test.
 787
 788         PR libstdc++/93244
 789         * testsuite/27_io/filesystem/path/generic/generic_string.cc: Adjust
 790         test to not fail due to PR 94063.
 791         * testsuite/27_io/filesystem/path/generic/utf.cc: Likewise.
 792         * testsuite/27_io/filesystem/path/generic/wchar_t.cc: Likewise.
 793
 794 2020-03-06  Andreas Krebbel  <krebbel@linux.ibm.com>
 795
 796         * src/c++11/system_error.cc: Omit the ENOTSUP case statement if it
 797         would match ENOSYS.
 798
 799 2020-03-05  Jonathan Wakely  <jwakely@redhat.com>
 800
 801         * testsuite/27_io/filesystem/operations/all.cc: Mark unused variable.
 802         * testsuite/27_io/filesystem/operations/copy.cc: Fix typo.
 803         * testsuite/experimental/filesystem/operations/copy.cc: Likewise.
 804         * testsuite/27_io/filesystem/operations/file_size.cc: Use correct type
 805         for return value, and in comparison.
 806         * testsuite/experimental/filesystem/operations/file_size.cc: Likewise.
 807
 808         PR libstdc++/94051
 809         * include/std/string_view: Include <bits/ostream_insert.h>.
 810         * testsuite/21_strings/basic_string_view/inserters/94051.cc: New test.
 811
 812 2020-03-04  Jonathan Wakely  <jwakely@redhat.com>
 813
 814         * include/bits/cpp_type_traits.h (__memcpyable): Fix comment.
 815
 816 2020-03-04  Patrick Palka  <ppalka@redhat.com>
 817
 818         PR libstdc++/94017
 819         * include/bits/ranges_algobase.h (__fill_n_fn::operator()): Refine
 820         condition for when to use memset, making sure to additionally check that
 821         the output pointer's value type is a non-volatile byte type.  Instead of
 822         requiring that the fill type is a byte type, just require that it's an
 823         integral type.
 824         * testsuite/20_util/specialized_algorithms/uninitialized_fill/94017.cc:
 825         New test.
 826         * testsuite/20_util/specialized_algorithms/uninitialized_fill_n/94017.cc:
 827         New test.
 828         * testsuite/25_algorithms/fill/94013.cc: Uncomment part of test that was
 829         blocked by PR 94017.
 830         * testsuite/25_algorithms/fill/94017.cc: New test.
 831         * testsuite/25_algorithms/fill_n/94017.cc: New test.
 832
 833         LWG 3355 The memory algorithms should support move-only input iterators
 834         introduced by P1207
 835         * include/bits/ranges_uninitialized.h
 836         (__uninitialized_copy_fn::operator()): Use std::move to avoid attempting
 837         to copy __ifirst, which could be a move-only input iterator.  Use
 838         operator- instead of ranges::distance to compute distance from a sized
 839         sentinel.
 840         (__uninitialized_copy_n_fn::operator()): Likewise.
 841         (__uninitialized_move_fn::operator()): Likewise.
 842         (__uninitialized_move_n_fn::operator()): Likewise.
 843         (__uninitialized_destroy_fn::operator()): Use std::move to avoid
 844         attempting to copy __first.
 845         (__uninitialized_destroy_n_fn::operator()): Likewise.
 846         * testsuite/20_util/specialized_algorithms/destroy/constrained.cc:
 847         Augment test.
 848         * .../specialized_algorithms/uninitialized_copy/constrained.cc:
 849         Likewise.
 850         * .../specialized_algorithms/uninitialized_move/constrained.cc:
 851         Likewise.
 852
 853         * testsuite/util/testsuite_iterators.h (test_range::get_iterator): Make
 854         protected instead of private.
 855         (test_sized_range_sized_sent): New.
 856
 857         * testsuite/util/testsuite_iterators.h (input_iterator_wrapper_nocopy):
 858         New testsuite iterator.
 859         * testsuite/24_iterators/counted_iterator/lwg3389.cc: use it.
 860         * testsuite/24_iterators/move_iterator/lwg3390.cc: Likewise.
 861
 862         * include/bits/ranges_uninitialized.h
 863         (uninitialized_copy_fn::operator()): Pass a reference type as the first
 864         argument to is_nothrow_assignable_v.
 865         (uninitialized_copy_fn::operator()): Likewise.
 866         (uninitialized_move_fn::operator()): Likewise.  Return an in_out_result
 867         with the input iterator stripped of its move_iterator.
 868         (uninitialized_move_n_fn::operator()): Likewise.
 869         (uninitialized_fill_fn::operator()): Pass a reference type as the first
 870         argument to is_nothrow_assignable_v.
 871         (uninitialized_fill_n_fn::operator()): Likewise.
 872
 873 2020-03-03  Jonathan Wakely  <jwakely@redhat.com>
 874
 875         PR libstdc++/94013
 876         * include/bits/cpp_type_traits.h (__memcpyable, __memcmpable): New
 877         traits to control when to use memmove and memcmp optimizations.
 878         (__is_nonvolatile_trivially_copyable): New helper trait.
 879         * include/bits/ranges_algo.h (__lexicographical_compare_fn): Do not
 880         use memcmp optimization with volatile data.
 881         * include/bits/ranges_algobase.h (__equal_fn): Use __memcmpable.
 882         (__copy_or_move, __copy_or_move_backward): Use __memcpyable.
 883         * include/bits/stl_algobase.h (__copy_move_a2): Use __memcpyable.
 884         (__copy_move_backward_a2): Likewise.
 885         (__equal_aux1): Use __memcmpable.
 886         (__lexicographical_compare_aux): Do not use memcmp optimization with
 887         volatile data.
 888         * testsuite/25_algorithms/copy/94013.cc: New test.
 889         * testsuite/25_algorithms/copy_backward/94013.cc: New test.
 890         * testsuite/25_algorithms/equal/94013.cc: New test.
 891         * testsuite/25_algorithms/fill/94013.cc: New test.
 892         * testsuite/25_algorithms/lexicographical_compare/94013.cc: New test.
 893         * testsuite/25_algorithms/move/94013.cc: New test.
 894         * testsuite/25_algorithms/move_backward/94013.cc: New test.
 895
 896         * include/bits/stl_algobase.h (lexicographical_compare_three_way):
 897         Avoid redundant iterator comparisons (LWG 3410).
 898
 899 2020-03-02  Jonathan Wakely  <jwakely@redhat.com>
 900
 901         PR libstdc++/93972
 902         * include/bits/stl_algobase.h (__memcmp): Allow pointer types to
 903         differ.
 904         * testsuite/25_algorithms/lexicographical_compare/uchar.cc: New test.
 905
 906         * include/std/ranges (__detail::__maybe_empty_t): Rename to
 907         __maybe_present_t.
 908         (__adaptor::_RangeAdaptor, join_view, split_view): Use new name.
 909
 910         * include/bits/ranges_algo.h (shift_right): Add 'typename' to
 911         dependent type.
 912
 913 2020-03-01  H.J. Lu  <hongjiu.lu@intel.com>
 914
 915         * config/abi/post/x86_64-linux-gnu/x32/baseline_symbols.txt: Updated.
 916
 917 2020-02-29  John David Anglin  <danglin@gcc.gnu.org>
 918
 919         * testsuite/17_intro/headers/c++1998/charset.cc: Skip on *-*-hpux*.
 920         * testsuite/17_intro/headers/c++2011/charset.cc: Likewise.
 921         * testsuite/17_intro/headers/c++2014/charset.cc: Likewise.
 922         * testsuite/17_intro/headers/c++2017/charset.cc: Likewise.
 923         * testsuite/17_intro/headers/c++2020/charset.cc: Likewise.
 924
 925         * testsuite/30_threads/condition_variable_any/stop_token/wait_on.cc:
 926         Add libatomic option.
 927         * testsuite/30_threads/jthread/jthread.cc: Likewise.
 928
 929 2020-02-29  François Dumont  <fdumont@gcc.gnu.org>
 930
 931         * include/bits/stl_algo.h
 932         (__find_if, __count_if, __is_permutation, std::is_permutation): Move...
 933         * include/bits/stl_algobase.h: ...here.
 934         * include/bits/hashtable_policy.h: Remove <bits/stl_algo.h> include.
 935
 936 2020-02-29  John David Anglin  <danglin@gcc.gnu.org>
 937
 938         * testsuite/30_threads/stop_token/stop_callback.cc: Add libatomic
 939         option.
 940         * testsuite/30_threads/stop_token/stop_callback/deadlock-mt.cc:
 941         Likewise.
 942         * testsuite/30_threads/stop_token/stop_callback/deadlock.cc: Likewise.
 943         * testsuite/30_threads/stop_token/stop_callback/destroy.cc: Likewise.
 944         * testsuite/30_threads/stop_token/stop_callback/invoke.cc: Likewise.
 945         * testsuite/30_threads/stop_token/stop_source.cc: Likewise.
 946         * testsuite/30_threads/stop_token/stop_source/assign.cc: Likewise.
 947         * testsuite/30_threads/stop_token/stop_token.cc: Likewise.
 948         * testsuite/30_threads/stop_token/stop_token/stop_possible.cc:
 949         Likewise.
 950
 951         PR libstdc++/92906
 952         * config/abi/post/hppa-linux-gnu/baseline_symbols.txt: Update.
 953
 954 2020-02-28  Patrick Palka  <ppalka@redhat.com>
 955
 956         PR libstdc++/93972
 957         * include/bits/ranges_algo.h (__lexicographical_compare_fn::operator()):
 958         Fix condition for when to use memcmp, making it consistent with the
 959         corresponding condition used in std::lexicographical_compare.
 960         * testsuite/25_algorithms/lexicographical_compare/93972.cc: New test.
 961
 962         * testsuite/26_numerics/headers/numeric/synopsis.cc: Add signatures for
 963         functions introduced in C++11, C++17 and C++2a.  Add 'constexpr' to
 964         existing signatures for C++2a.
 965
 966 2020-02-28  Jonathan Wakely  <jwakely@redhat.com>
 967
 968         * testsuite/24_iterators/range_operations/advance_debug_neg.cc: Run
 969         test instead of just compiling it.
 970
 971 2020-02-28  Patrick Palka  <ppalka@redhat.com>
 972
 973         * include/std/ranges (reverse_view::_S_needs_cached_begin): Set to false
 974         whenever the underlying range models common_range.
 975
 976         * include/std/ranges (__detail::_CachedPosition): New struct.
 977         (views::filter_view::_S_needs_cached_begin): New member variable.
 978         (views::filter_view::_M_cached_begin): New member variable.
 979         (views::filter_view::begin): Use _M_cached_begin to cache its
 980         result.
 981         (views::drop_view::_S_needs_cached_begin): New static member variable.
 982         (views::drop_view::_M_cached_begin): New member variable.
 983         (views::drop_view::begin): Use _M_cached_begin to cache its result
 984         when _S_needs_cached_begin.
 985         (views::drop_while_view::_M_cached_begin): New member variable.
 986         (views::drop_while_view::begin): Use _M_cached_begin to cache its
 987         result.
 988         (views::reverse_view::_S_needs_cached_begin): New static member
 989         variable.
 990         (views::reverse_view::_M_cached_begin): New member variable.
 991         (views::reverse_view::begin): Use _M_cached_begin to cache its result
 992         when _S_needs_cached_begin.
 993         * testsuite/std/ranges/adaptors/drop.cc: Augment test to check that
 994         drop_view::begin caches its result.
 995         * testsuite/std/ranges/adaptors/drop_while.cc: Augment test to check
 996         that drop_while_view::begin caches its result.
 997         * testsuite/std/ranges/adaptors/filter.cc: Augment test to check that
 998         filter_view::begin caches its result.
 999         * testsuite/std/ranges/adaptors/reverse.cc: Augment test to check that
1000         reverse_view::begin caches its result.
1001
1002 2020-02-28  Jonathan Wakely  <jwakely@redhat.com>
1003
1004         * testsuite/27_io/filesystem/operations/last_write_time.cc: Fixes for
1005         filesystems that silently truncate timestamps.
1006         * testsuite/experimental/filesystem/operations/last_write_time.cc:
1007         Likewise.
1008
1009         * testsuite/21_strings/basic_string/cons/char/1.cc: Disable
1010         -Wstringop-overflow warnings.
1011
1012 2020-02-27  Jonathan Wakely  <jwakely@redhat.com>
1013
1014         * testsuite/lib/libstdc++.exp (v3_target_compile): Add
1015         -fdiagnostics-urls=never to options.
1016
1017 2020-02-27  Patrick Palka  <ppalka@redhat.com>
1018
1019         * include/std/ranges (transform_view::_Iterator<_Const>): Befriend
1020         _Iterator<!_Const>.
1021         (transform_view::_Sentinel<_Const>): Befriend _Sentinel<!_Const>.
1022         (take_view::_Sentinel<_Const>): Likewise.
1023         (take_while_view::_Sentinel<_Const>): Likewise.
1024         (split_view::_OuterIter<_Const>): Befriend _OuterIter<!_Const>.
1025         * testsuite/std/ranges/adaptors/split.cc: Augment test.
1026         * testsuite/std/ranges/adaptors/take.cc: Augment test.
1027         * testsuite/std/ranges/adaptors/take_while.cc: Augment test.
1028         * testsuite/std/ranges/adaptors/transform.cc: Augment test.
1029
1030         * testsuite/25_algorithms/copy/constrained.cc: Don't assume that the
1031         base() of a vector<>::iterator is a pointer.
1032         * testsuite/25_algorithms/copy_backward/constrained.cc: Likewise.
1033         * testsuite/25_algorithms/move/constrained.cc: Likewise.
1034         * testsuite/25_algorithms/move_backward/constrained.cc: Likewise.
1035         * testsuite/25_algorithms/inplace_merge/constrained.cc: Use foo.data()
1036         instead of &foo[0].
1037         * testsuite/25_algorithms/partial_sort/constrained.cc: Likewise.
1038         * testsuite/25_algorithms/partial_sort_copy/constrained.cc: Likewise.
1039         * testsuite/25_algorithms/shuffle/constrained.cc: Likewise.
1040         * testsuite/25_algorithms/sort/constrained.cc: Likewise.
1041         * testsuite/25_algorithms/stable_sort/constrained.cc: Likewise.
1042
1043 2020-02-27  Jonathan Wakely  <jwakely@redhat.com>
1044
1045         * include/debug/array (operator<=>): Define for C++20.
1046         * testsuite/23_containers/array/tuple_interface/get_debug_neg.cc:
1047         Adjust dg-error line numbers.
1048         * testsuite/23_containers/array/tuple_interface/
1049         tuple_element_debug_neg.cc: Likewise.
1050
1051         * testsuite/23_containers/span/back_assert_neg.cc: Add #undef before
1052         defining _GLIBCXX_ASSERTIONS.
1053         * testsuite/23_containers/span/first_2_assert_neg.cc: Likewise.
1054         * testsuite/23_containers/span/first_assert_neg.cc: Likewise.
1055         * testsuite/23_containers/span/front_assert_neg.cc: Likewise.
1056         * testsuite/23_containers/span/index_op_assert_neg.cc: Likewise.
1057         * testsuite/23_containers/span/last_2_assert_neg.cc: Likewise.
1058         * testsuite/23_containers/span/last_assert_neg.cc: Likewise.
1059         * testsuite/23_containers/span/subspan_2_assert_neg.cc: Likewise.
1060         * testsuite/23_containers/span/subspan_3_assert_neg.cc: Likewise.
1061         * testsuite/23_containers/span/subspan_4_assert_neg.cc: Likewise.
1062         * testsuite/23_containers/span/subspan_5_assert_neg.cc: Likewise.
1063         * testsuite/23_containers/span/subspan_6_assert_neg.cc: Likewise.
1064         * testsuite/23_containers/span/subspan_assert_neg.cc: Likewise.
1065
1066         * include/debug/string (__gnu_debug::basic_string::insert): Fix for
1067         C++98 where the member function of the base class returns void.
1068
1069         * testsuite/util/testsuite_iterators.h (forward_iterator_wrapper): Add
1070         equality comparisons that support value-initialized iterators.
1071
1072         * include/bits/boost_concept_check.h (__function_requires): Add
1073         _GLIBCXX14_CONSTEXPR.
1074         * testsuite/25_algorithms/min/concept_checks.cc: New test.
1075
1076 2020-02-26  Patrick Palka  <ppalka@redhat.com>
1077
1078         PR libstdc++/93936
1079         * include/std/ranges (split_view::_InnerIter::operator==): Compare
1080         the operands' _M_i rather than their _M_i.current().
1081         * testsuite/std/ranges/adaptors/split.cc: Augment test.
1082
1083         P1645R1 constexpr for <numeric> algorithms
1084         * include/bits/stl_numeric.h (iota, accumulate, inner_product,
1085         partial_sum, adjacent_difference): Make conditionally constexpr for
1086         C++20.
1087         * include/std/numeric (__cpp_lib_constexpr_numeric): Define this feature
1088         test macro.
1089         (reduce, transform_reduce, exclusive_scan, inclusive_scan,
1090         transform_exclusive_scan, transform_inclusive_scan): Make conditionally
1091         constexpr for C++20.
1092         * include/std/version (__cpp_lib_constexpr_numeric): Define.
1093         * testsuite/26_numerics/accumulate/constexpr.cc: New test.
1094         * testsuite/26_numerics/adjacent_difference/constexpr.cc: Likewise.
1095         * testsuite/26_numerics/exclusive_scan/constexpr.cc: Likewise.
1096         * testsuite/26_numerics/inclusive_scan/constexpr.cc: Likewise.
1097         * testsuite/26_numerics/inner_product/constexpr.cc: Likewise.
1098         * testsuite/26_numerics/iota/constexpr.cc: Likewise.
1099         * testsuite/26_numerics/partial_sum/constexpr.cc: Likewise.
1100         * testsuite/26_numerics/reduce/constexpr.cc: Likewise.
1101         * testsuite/26_numerics/transform_exclusive_scan/constexpr.cc: Likewise.
1102         * testsuite/26_numerics/transform_inclusive_scan/constexpr.cc: Likewise.
1103         * testsuite/26_numerics/transform_reduce/constexpr.cc: Likewise.
1104
1105 2020-02-26  Jonathan Wakely  <jwakely@redhat.com>
1106
1107         * include/bits/ranges_algo.h (__lexicographical_compare_fn): Declare
1108         variables in smaller scope and avoid calling ranges::distance when we
1109         know they are pointers. Remove statically-unreachable use of
1110         __builtin_unreachable().
1111         * include/bits/stl_algobase.h (__lexicographical_compare::__lc):
1112         Define inline.
1113
1114         * include/std/ranges (__detail::__maybe_empty_t): Define new helper
1115         alias.
1116         (__detail::__maybe_const_t): Likewise.
1117         (__adaptor::_RangeAdaptor): Use __maybe_empty_t.
1118         (transform_view, take_view, take_while_view, elements_view): Use
1119         __maybe_const_t.
1120         (join_view, split_view): Use both.
1121
1122 2020-02-25  Patrick Palka  <ppalka@redhat.com>
1123
1124         LWG 3397 basic_istream_view::iterator should not provide
1125         iterator_category
1126         * include/std/ranges (basic_istream_view:_Iterator::iterator_category):
1127         Rename to ...
1128         (basic_istream_view:_Iterator::iterator_concept): ... this.
1129         * testsuite/std/ranges/istream_view.cc: Augment test.
1130
1131         LWG 3325 Constrain return type of transformation function for
1132         transform_view
1133         * include/std/ranges (transform_view): Constrain the return type of the
1134         transformation function as per LWG 3325.
1135         * testsuite/std/ranges/adaptors/lwg3325_neg.cc: New test.
1136
1137         LWG 3313 join_view::_Iterator::operator-- is incorrectly constrained
1138         * include/std/ranges (join_view::_Iterator::operator--): Require that
1139         range_reference_t<_Base> models common_range.
1140         * testsuite/std/ranges/adaptors/lwg3313_neg.cc: New test.
1141
1142         LWG 3301 transform_view::_Iterator has incorrect iterator_category
1143         * include/std/ranges (transform_view::_Iterator::_S_iter_cat): Adjust
1144         determination of iterator_category as per LWG 3301.
1145         * testsuite/std/ranges/adaptors/transform.cc: Augment test.
1146
1147         LWG 3292 iota_view is under-constrained
1148         * include/std/ranges (iota_view): Require that _Winc models semiregular
1149           as per LWG 3292.
1150         * testsuite/std/ranges/iota/lwg3292_neg.cc: New test.
1151
1152 2020-02-25  Jonathan Wakely  <jwakely@redhat.com>
1153
1154         * include/bits/ranges_algobase.h (__copy_or_move): Do not use memmove
1155         during constant evaluation. Call __builtin_memmove directly instead of
1156         __memmove.
1157         (__copy_or_move_backward): Likewise.
1158         * include/bits/stl_algobase.h (__memmove): Remove.
1159         (__copy_move<M, true, random_access_iterator_tag>::__copy_m)
1160         (__copy_move_backward<M, true, random_access_iterator_tag>::__copy_m):
1161         Use __builtin_memmove directly instead of __memmove.
1162         (__copy_move_a2): Do not use memmove during constant evaluation.
1163         (__copy_move_backward_a2): Use _IsMove constant to select correct
1164         __copy_move_backward specialization.
1165         * testsuite/25_algorithms/copy_backward/constexpr.cc: Check for copies
1166         begin turned into moves during constant evaluation.
1167
1168         * testsuite/25_algorithms/move_backward/93872.cc: Add test left out of
1169         previous commit.
1170
1171         PR libstdc++/93872
1172         * include/bits/stl_algobase.h (__memmove): Cast away const before
1173         doing move assignment.
1174         * testsuite/25_algorithms/move/93872.cc: New test.
1175         * testsuite/25_algorithms/move_backward/93872.cc: New test.
1176
1177 2020-02-24  Patrick Palka  <ppalka@redhat.com>
1178
1179         PR libstdc++/93884
1180         * include/bits/ranges_algobase.h (__copy_or_move,
1181         __copy_or_move_backward): Don't inspect the iter_value_t of the output
1182         iterator, instead inspect its iterator_traits directly.
1183         * include/bits/stl_iterator.h (back_insert_iterator::container):
1184         Conditionally initialize.
1185         (back_insert_iterator::difference_type): Conditionally define.
1186         (back_insert_iterator::back_insert_iterator): Conditionally define this
1187         default constructor.
1188         (front_insert_iterator::container): Conditionally initialize.
1189         (front_insert_iterator::difference_type): Conditionally define.
1190         (front_insert_iterator::front_insert_iterator): Conditionally define
1191         this default constructor.
1192         * 24_iterators/back_insert_iterator/pr93884.cc: New test.
1193         * 24_iterators/front_insert_iterator/pr93884.cc: New test.
1194
1195         P0769R2 Add shift to <algorithm>
1196         * include/bits/ranges_algo.h (shift_left, shift_right): New.
1197         * testsuite/25_algorithms/shift_left/1.cc: New test.
1198         * testsuite/25_algorithms/shift_right/1.cc: New test.
1199
1200 2020-02-24  Jonathan Wakely  <jwakely@redhat.com>
1201
1202         * include/bits/stream_iterator.h (istream_iterator(default_sentinel_t)):
1203         Make noexcept-specifier conditional.
1204         * testsuite/24_iterators/istream_iterator/cons/sentinel.cc: Check
1205         noexcept-specifier.
1206
1207         * include/bits/stream_iterator.h (istream_iterator(default_sentinel_t)):
1208         Add constructor.
1209         (operator==(istream_iterator, default_sentinel_t)): Add operator.
1210         (ostream_iterator::difference_type): Define to ptrdiff_t for C++20.
1211         * include/bits/streambuf_iterator.h
1212         (istreambuf_iterator(default_sentinel_t)): Add constructor.
1213         (operator==(istreambuf_iterator, default_sentinel_t)): Add operator.
1214         * testsuite/24_iterators/istream_iterator/cons/sentinel.cc:
1215         New test.
1216         * testsuite/24_iterators/istream_iterator/sentinel.cc: New test.
1217         * testsuite/24_iterators/istreambuf_iterator/cons/sentinel.cc:
1218         New test.
1219         * testsuite/24_iterators/istreambuf_iterator/sentinel.cc: New test.
1220
1221         * include/std/ranges (__deep_const_range, __enable_view_impl): Remove.
1222         (ranges::enable_view): Simplify (LWG 3326).
1223         * include/bits/range_access.h (ranges::enable_view): Declare.
1224         * include/bits/regex.h (__enable_view_impl): Remove partial
1225         specialization.
1226         * include/bits/stl_multiset.h (__enable_view_impl): Likewise.
1227         * include/bits/stl_set.h (__enable_view_impl): Likewise.
1228         * include/bits/unordered_set.h (__enable_view_impl): Likewise.
1229         * include/debug/multiset.h (__enable_view_impl): Likewise.
1230         * include/debug/set.h (__enable_view_impl): Likewise.
1231         * include/debug/unordered_set (__enable_view_impl): Likewise.
1232         * include/experimental/string_view (ranges::enable_view): Define
1233         partial specialization.
1234         * include/std/span (ranges::enable_view): Likewise.
1235         * include/std/string_view (ranges::enable_view): Likewise.
1236         * testsuite/std/ranges/view.cc: Check satisfaction of updated concept.
1237
1238 2020-02-21  Jonathan Wakely  <jwakely@redhat.com>
1239
1240         * include/std/optional (operator<=>(optional<T>, optional<U>))
1241         (operator<=>(optional<T>, nullopt), operator<=>(optional<T>, U)):
1242         Define for C++20.
1243         * include/std/tuple (__tuple_cmp): New helper function for <=>.
1244         (operator<=>(tuple<T...>, tuple<U>...)): Define for C++20.
1245         * include/std/variant (operator<=>(variant<T...>, variant<T...>))
1246         (operator<=>(monostate, monostate)): Define for C++20.
1247         * testsuite/20_util/optional/relops/three_way.cc: New test.
1248         * testsuite/20_util/tuple/comparison_operators/three_way.cc: New test.
1249         * testsuite/20_util/variant/89851.cc: Move to ...
1250         * testsuite/20_util/variant/relops/89851.cc: ... here.
1251         * testsuite/20_util/variant/90008.cc: Move to ...
1252         * testsuite/20_util/variant/relops/90008.cc: ... here.
1253         * testsuite/20_util/variant/relops/three_way.cc: New test.
1254
1255 2020-02-20  Patrick Palka  <ppalka@redhat.com>
1256
1257         * include/std/ranges (views::__adaptor::__maybe_refwrap): New utility
1258         function.
1259         (views::__adaptor::_RangeAdaptor::operator()): Add comments.  Use
1260         __maybe_refwrap to capture lvalue references by reference, and then use
1261         unwrap_reference_t to forward the by-reference captures as references.
1262         * testsuite/std/ranges/adaptors/split.cc: Augment test.
1263         * testsuite/std/ranges/adaptors/split_neg.cc: New test.
1264
1265         * include/std/ranges (iota_view): Forward declare _Sentinel.
1266         (iota_view::_Iterator): Befriend _Sentinel.
1267         (iota_view::_Sentinel::_M_equal): New member function.
1268         (iota_view::_Sentinel::operator==): Use it.
1269         (views::_Iota::operator()): Forward __f using the correct type.
1270         * testsuite/std/ranges/access/ssize.cc (test06): Don't call views::iota
1271         with integers of different signedness, to appease iota_view's deduction
1272         guide.
1273         * testsuite/std/ranges/iota/iota_view.cc: Augment test.
1274
1275 2020-02-20  Jonathan Wakely  <jwakely@redhat.com>
1276
1277         * include/bits/range_access.h (ranges::begin): Reject array of
1278         incomplete type.
1279         (ranges::end, ranges::size): Require arrays to be bounded.
1280         (ranges::data): Require lvalue or borrowed_range.
1281         (ranges::iterator_t): Remove constraint.
1282         * testsuite/std/ranges/access/begin.cc: Do not check array of
1283         incomplete type.
1284         * testsuite/std/ranges/access/begin_neg.cc: New test.
1285         * testsuite/std/ranges/access/end_neg.cc: Adjust expected error.
1286         * testsuite/std/ranges/access/size_neg.cc: Adjust expected error.
1287         * testsuite/std/ranges/access/ssize.cc: Do not check array of
1288         incomplete type.
1289
1290         * include/std/system_error (error_category::operator<=>)
1291         (operator<=>(const error_code&, const error_code&))
1292         (operator<=>(const error_condition&, const error_condition&)): Define
1293         for C++20.
1294         * testsuite/19_diagnostics/error_category/operators/less.cc: New test.
1295         * testsuite/19_diagnostics/error_category/operators/three_way.cc: New
1296         test.
1297         * testsuite/19_diagnostics/error_code/operators/equal.cc: Remove
1298         incorrect comment.
1299         * testsuite/19_diagnostics/error_code/operators/less.cc: New test.
1300         * testsuite/19_diagnostics/error_code/operators/not_equal.cc: Remove
1301         incorrect comment.
1302         * testsuite/19_diagnostics/error_code/operators/three_way.cc: New test.
1303         * testsuite/19_diagnostics/error_condition/operators/equal.cc: Remove
1304         incorrect comment.
1305         * testsuite/19_diagnostics/error_condition/operators/less.cc: New test.
1306         * testsuite/19_diagnostics/error_condition/operators/not_equal.cc:
1307         Remove incorrect comment.
1308         * testsuite/19_diagnostics/error_condition/operators/three_way.cc: New
1309         test.
1310
1311         * libsupc++/typeinfo (type_info::operator!=): Remove for C++20.
1312
1313         * include/std/thread (thread::id::operator<=>): Define for C++20.
1314         * testsuite/30_threads/thread/id/70294.cc: Do not take addresses of
1315         functions in namespace std.
1316         * testsuite/30_threads/thread/id/operators_c++20.cc: New test.
1317
1318 2020-02-19  Patrick Palka  <ppalka@redhat.com>
1319
1320         * testsuite/std/ranges/adaptors/split.cc (test03): Don't include the
1321         null terminator of the underlying string as part of the test_range.
1322         (main): Call test03.
1323
1324 2020-02-19  Jonathan Wakely  <jwakely@redhat.com>
1325
1326         * include/bits/stl_iterator.h (common_iterator): Add copyable<I>
1327         requirement (LWG 3385).
1328         * testsuite/24_iterators/headers/iterator/synopsis_c++20.cc: Adjust
1329         expected declaration.
1330
1331         * include/std/ranges (take_while_view, drop_view, drop_while_view)
1332         (elements_view:_Iterator): Initialize data members (LWG 3364).
1333
1334         * libsupc++/compare (three_way_comparable): Remove always-false check
1335         that should have been removed with weak_equality (P1959R0).
1336         (three_way_comparable_with): Likewise. Reorder requirements (LWG 3360).
1337
1338         * include/std/concepts (__detail::__partially_ordered_with): Move here
1339         from <compare>.
1340         (totally_ordered, totally_ordered_with): Use __partially_ordered_with
1341         to simplify definition (LWG 3331).
1342         * libsupc++/compare (__detail::__partially_ordered_with): Move to
1343         <concepts>.
1344
1345         * include/std/concepts (totally_ordered_with): Remove redundant
1346         requirement (LWG 3329).
1347
1348         * include/std/ranges (__detail::__convertible_to_non_slicing): New
1349         helper concept.
1350         (__detail::__pair_like_convertible_to): Remove.
1351         (__detail::__pair_like_convertible_from): Add requirements for
1352         non-slicing conversions.
1353         (subrange): Constrain constructors with __convertible_to_non_slicing.
1354         Remove constructors from pair-like types. Add new deduction guide.
1355         * testsuite/std/ranges/subrange/lwg3282_neg.cc: New test.
1356
1357         * include/bits/iterator_concepts.h (iter_move): Add declaration to
1358         prevent unqualified lookup finding a suitable declaration (LWG 3247).
1359
1360         * include/std/memory_resource (polymorphic_allocator::allocate)
1361         (polymorphic_allocator::allocate_object): Change type of exception to
1362         bad_array_new_length (LWG 3237).
1363         * testsuite/20_util/polymorphic_allocator/lwg3237.cc: New test.
1364
1365         * include/std/type_traits (__cpp_lib_unwrap_ref): Define (LWG 3348).
1366         * include/std/version (__cpp_lib_unwrap_ref): Likewise.
1367         * testsuite/20_util/unwrap_reference/1.cc: Check macro.
1368         * testsuite/20_util/unwrap_reference/3.cc: New test.
1369
1370         * include/std/numeric (midpoint(T8, T*)): Do not check for complete
1371         type during overload resolution, use static assert instead (LWG 3200).
1372         * testsuite/26_numerics/midpoint/pointer.cc: Do not test with
1373         incomplete type.
1374         * testsuite/26_numerics/midpoint/pointer_neg.cc: New test.
1375
1376         * include/std/span (span(T (&)[N])): Use non-deduced context to
1377         prevent first parameter from interfering with class template argument
1378         deduction (LWG 3369).
1379         * testsuite/23_containers/span/deduction.cc: Add missing 'const'.
1380         * testsuite/23_containers/span/lwg3255.cc: Check for construction from
1381         rvalues.
1382
1383         * include/std/span (span::const_iterator, span::const_reverse_iterator)
1384         (span::cbegin(), span::cend(), span::crbegin(), span::crend()):
1385         Remove (LWG 3320).
1386         * testsuite/23_containers/span/everything.cc: Replace uses of cbegin
1387         and cend.
1388         * testsuite/20_util/specialized_algorithms/destroy/constrained.cc:
1389         Likewise.
1390         * testsuite/20_util/specialized_algorithms/uninitialized_copy/
1391         constrained.cc: Likewise.
1392         * testsuite/20_util/specialized_algorithms/
1393         uninitialized_default_construct/constrained.cc: Likewise.
1394         * testsuite/20_util/specialized_algorithms/uninitialized_fill/
1395         constrained.cc: Likewise.
1396         * testsuite/20_util/specialized_algorithms/uninitialized_move/
1397         constrained.cc: Likewise.
1398         * testsuite/20_util/specialized_algorithms/
1399         uninitialized_value_construct/constrained.cc: Likewise.
1400
1401         * include/bits/range_access.h (range_size_t): Define alias template.
1402         * include/std/ranges (all_view): Rename to views::all_t (LWG 3335).
1403         * testsuite/std/ranges/adaptors/filter.cc: Adjust to new name.
1404
1405         * include/std/ranges (filter_view, transform_view, take_view)
1406         (join_view, split_view, reverse_view): Remove commented-out converting
1407         constructors (LWG 3280).
1408
1409         * include/std/memory (uninitialized_construct_using_allocator): Use
1410         std::construct_at (LWG 3321).
1411
1412         * include/std/memory_resource (polymorphic_allocator::allocate_bytes)
1413         (polymorphic_allocator::allocate_object)
1414         (polymorphic_allocator::new_object): Add nodiscard attribute (LWG3304).
1415
1416         LWG 3379. "safe" in several library names is misleading
1417         * include/bits/range_access.h (enable_safe_range): Rename to
1418         enable_borrowed_range.
1419         (__detail::__maybe_safe_range): Rename to __maybe_borrowed_range.
1420         (safe_range): Rename to borrowed_range.
1421         * include/bits/ranges_algo.h: Adjust to use new names.
1422         * include/bits/ranges_algobase.h: Likewise.
1423         * include/bits/ranges_uninitialized.h: Likewise.
1424         * include/std/ranges: Likewise.
1425         (safe_iterator_t): Rename to borrowed_iterator_t.
1426         (safe_subrange_t): Rename to borrowed_subrange_t.
1427         * include/std/span: Adjust to use new names.
1428         * include/std/string_view: Likewise.
1429         * include/experimental/string_view: Likewise.
1430         * testsuite/std/ranges/access/begin.cc: Likewise.
1431         * testsuite/std/ranges/access/cbegin.cc: Likewise.
1432         * testsuite/std/ranges/access/cdata.cc: Likewise.
1433         * testsuite/std/ranges/access/cend.cc: Likewise.
1434         * testsuite/std/ranges/access/crbegin.cc: Likewise.
1435         * testsuite/std/ranges/access/crend.cc: Likewise.
1436         * testsuite/std/ranges/access/data.cc: Likewise.
1437         * testsuite/std/ranges/access/end.cc: Likewise.
1438         * testsuite/std/ranges/access/rbegin.cc: Likewise.
1439         * testsuite/std/ranges/access/rend.cc: Likewise.
1440         * testsuite/std/ranges/safe_range.cc: Likewise.
1441         * testsuite/std/ranges/safe_range_types.cc: Likewise.
1442         * testsuite/util/testsuite_iterators.h: Likewise.
1443
1444         * include/std/ranges (tuple_element<0, const subrange<I, S, K>>)
1445         (tuple_element<1, const subrange<I, S, K>>): Add partial
1446         specializations (LWG 3398).
1447         * testsuite/std/ranges/subrange/tuple_like.cc: New test.
1448
1449         * include/bits/ranges_algo.h (__find_fn, __find_first_of_fn)
1450         (__adjacent_find_fn, __remove_if_fn, __remove_copy_if_fn)
1451         (__unique_fn, __unique_copy_fn): Remove redundant conversions to bool.
1452
1453 2020-02-18  Patrick Palka  <ppalka@redhat.com>
1454
1455         P1983R0 Wording for GB301, US296, US292, US291, and US283
1456         * include/std/ranges (filter_view::pred): New member function.
1457         (join_view::_Iterator::_Iterator): Remove now-redundant comment since
1458         P1983R0 fixes the highlighted issue in the same way.
1459         (join_view::_Iterator<_Const>): Add friend
1460         join_view::_Iterator<!_Const>.
1461         (join_view::_M_inner): Remove mutable specifier, effectively reverting
1462         the proposed wording changes of P3278.
1463         (join_view::begin): Refine the condition for when to return a const
1464         iterator.
1465         (split_view::_OuterIter::_OuterIter): Adjust constraints.
1466         * testsuite/std/ranges/adaptors/filter.cc: Test that filter_view::pred
1467         exists and works.
1468
1469 2020-02-18  Jonathan Wakely  <jwakely@redhat.com>
1470
1471         PR libstdc++/93818
1472         * include/std/ranges (_RangeAdaptor): Add deduction guide.
1473         (filter_view::_Iterator): Add alias _Vp_iter and use in place of
1474         iterator_t<_Vp>.
1475         (filter_view::_Iterator::_S_iter_cat()): Add 'typename'.
1476         (transform_view::_Iterator): Add alias _Base_iter and use in place of
1477         iterator_t<_Base>.
1478         (transform_view::_Iterator::_S_iter_cat()): Add 'typename'.
1479         (join_view::_Iterator): Add _Outer_iter and _Inner_iter aliases.
1480         (join_view::_Iterator::_S_iter_cat()): Add 'typename'.
1481         (split_view::_InnerIter::_S_iter_cat()): Likewise.
1482
1483         * testsuite/20_util/integer_comparisons/equal.cc: Fix invalid
1484         assumption that long is wider than int.
1485         * testsuite/20_util/integer_comparisons/greater_equal.cc: Likewise.
1486         * testsuite/20_util/integer_comparisons/less.cc: Likewise.
1487         * testsuite/20_util/integer_comparisons/less_equal.cc: Likewise.
1488         * testsuite/20_util/integer_comparisons/not_equal.cc: Likewise.
1489
1490         P1976R2 Fixed-size span construction from dynamic range
1491         * include/std/span (__cpp_lib_span): Update value.
1492         (span(It, size_type), span(It, End)): Make conditionally explicit. Add
1493         assertion.
1494         (span(R&&), span(const span<OType, OExtent>&)): Likewise and relax
1495         constraints.
1496         (span::first<Count>(), span::last<Count>()): Use explicit type in
1497         return statement.
1498         (as_bytes, as_writable_bytes): Likewise.
1499         * include/std/version (__cpp_lib_span): Update value.
1500         * testsuite/23_containers/span/1.cc: Check new value.
1501         * testsuite/23_containers/span/2.cc: Check new value.
1502         * testsuite/23_containers/span/explicit.cc: New test.
1503
1504         * include/std/span (span::__is_compatible_array): Simplify alias
1505         template by using requires-clause.
1506         (span::__is_compatible_ref): New alias template for constraining
1507         constructors.
1508         (span::__is_compatible_iterator, span::__is_compatible_range): Remove.
1509         (span(It, size_type), span(It, End)): Use __is_compatible_ref.
1510         (span(T(&)[N], span(array<T, N>&), span(const array<T, N>&)): Remove
1511         redundant parentheses.
1512         (span(R&&)): Add missing constraints.
1513
1514         * include/std/span (span): Reorder members and rename template
1515         parameters to match declarations in the C++2a working paper.
1516
1517         P2116R0 Remove tuple-like protocol support from fixed-extent span
1518         * include/std/span (get, tuple_size, tuple_element): Remove.
1519         * testsuite/23_containers/span/everything.cc: Remove checks for
1520         tuple-like API.
1521         * testsuite/23_containers/span/get_neg.cc: Remove.
1522         * testsuite/23_containers/span/tuple_element_dynamic_neg.cc: Remove.
1523         * testsuite/23_containers/span/tuple_element_oob_neg.cc: Remove.
1524         * testsuite/23_containers/span/tuple_size_neg.cc: Remove.
1525
1526 2020-02-17  Patrick Palka  <ppalka@redhat.com>
1527
1528         P2106R0 Alternative wording for GB315 and GB316
1529         * include/bits/ranges_algo.h (in_fun_result): New.
1530         (for_each_result, for_each_n_result): Change into an alias of
1531         in_fun_result.
1532         (in_in_result): New.
1533         (mismatch_result): Change into an alias of in_in_result.
1534         (copy_if_result): Change into an alias of in_out_result.
1535         (swap_ranges_result): Change into an alias of in_in_result.
1536         (unary_transform_result): Change into an alias of in_out_result.
1537         (in_in_out_result): New.
1538         (binary_transform_result): Change into an alias of in_in_out_result.
1539         (replace_copy_result, replace_copy_if_result, remove_copy_if_result,
1540         remove_copy_result, unique_copy_result, reverse_copy_result,
1541         rotate_copy_result, partial_sort_copy_result): Change into an alias of
1542         in_out_result.
1543         (in_out_out_result): New.
1544         (partition_copy_result, merge_result): Change into an alias of
1545         in_out_out_result.
1546         (set_union_result, set_intersection_result): Change into an alias of
1547         in_in_out_result.
1548         (set_difference_result): Change into an alias of in_out_result.
1549         (set_symmetric_difference): Change into an alias of in_in_out_result.
1550         (min_max_result): New.
1551         (minmax_result, minmax_element_result): Change into an alias of
1552         min_max_result.
1553         (in_found_result): New.
1554         (next_permutation_result, prev_permutation_result): Change into an alias
1555         of in_found_result.
1556         (__next_permutation_fn::operator(), __prev_permutation_fn::operator()):
1557         Adjust following changes to next_permutation_result and
1558         prev_permutation_result.
1559         * include/bits/ranges_algobase.h (in_out_result): New.
1560         (copy_result, move_result, move_backward_result, copy_backward_result,
1561         copy_n_result): Change into an alias of in_out_result.
1562         * include/bits/ranges_uninitialized.h (uninitialized_copy_result,
1563         uninitialized_copy_n_result, uninitialized_move_result,
1564         uninitialized_move_n_result): Likewise.
1565         * testsuite/25_algorithms/next_permutation/constrained.cc: Adjust uses of
1566         structured bindings.
1567         * testsuite/25_algorithms/prev_permutation/constrained.cc: Likewise.
1568
1569         P1243R4 Rangify new algorithms
1570         * include/bits/ranges_algo.h (for_each_n_result, __for_each_n_fn,
1571         for_each_n, __sample_fn, sample, __clamp_fn, clamp): New.
1572         * testsuite/25_algorithms/clamp/constrained.cc: New test.
1573         * testsuite/25_algorithms/for_each/constrained.cc: Augment test.
1574         * testsuite/25_algorithms/sample/constrained.cc: New test.
1575
1576 2020-02-17  Jonathan Wakely  <jwakely@redhat.com>
1577
1578         P1964R2 Wording for boolean-testable
1579         * include/bits/ranges_algo.h (__find_fn, __find_first_of_fn)
1580         (__adjacent_find_fn): Cast result of predicate to bool.
1581         * include/std/concepts (__boolean): Remove.
1582         (__detail::__boolean_testable_impl, __detail::__boolean_testable): Add
1583         new helper concepts.
1584         (__detail::__weakly_eq_cmp_with, totally_ordered, totally_ordered_with)
1585         (predicate): Use __boolean_testable instead of boolean.
1586         * libsupc++/compare (__detail::__partially_ordered, _Synth3way):
1587         Likewise.
1588
1589         P1970R2 Consistency for size() functions: Add ranges::ssize
1590         * include/bits/range_access.h (_SSize, ssize): Define for C++20.
1591         * testsuite/std/ranges/access/ssize.cc: New test.
1592
1593         P1956R1 On the names of low-level bit manipulation functions
1594         * include/bits/hashtable_policy.h: Update comment.
1595         * include/std/bit (__ispow2, __ceil2, __floor2, __log2p1): Rename.
1596         (ispow2, ceil2, floor2, log2p1): Likewise.
1597         (__cpp_lib_int_pow2): Add feature test macro.
1598         * include/std/charconv (__to_chars_len_2): Adjust use of __log2p1.
1599         * include/std/memory (assume_aligned): Adjust use of ispow2.
1600         * include/std/version (__cpp_lib_int_pow2): Add.
1601         * libsupc++/new_opa.cc: Adjust use of __ispow2.
1602         * src/c++17/memory_resource.cc: Likewise, and for __ceil2 and __log2p1.
1603         * testsuite/17_intro/freestanding.cc: Adjust use of ispow2.
1604         * testsuite/26_numerics/bit/bit.pow.two/ceil2.cc: Rename to ...
1605         * testsuite/26_numerics/bit/bit.pow.two/bit_ceil.cc: ... here.
1606         * testsuite/26_numerics/bit/bit.pow.two/ceil2_neg.cc: Rename to ...
1607         * testsuite/26_numerics/bit/bit.pow.two/bit_ceil_neg.cc: ... here.
1608         * testsuite/26_numerics/bit/bit.pow.two/floor2.cc: Rename to ...
1609         * testsuite/26_numerics/bit/bit.pow.two/bit_floor.cc: ... here.
1610         * testsuite/26_numerics/bit/bit.pow.two/log2p1.cc: Rename to ...
1611         * testsuite/26_numerics/bit/bit.pow.two/bit_width.cc: ... here.
1612         * testsuite/26_numerics/bit/bit.pow.two/ispow2.cc: Rename to ...
1613         * testsuite/26_numerics/bit/bit.pow.two/has_single_bit.cc: ... here.
1614
1615         * include/std/charconv: Add comment.
1616
1617         PR libstdc++/92546 (partial)
1618         * include/bits/random.h (uniform_random_bit_generator): Move definition
1619         to <bits/uniform_int_dist.h>.
1620         * include/bits/ranges_algo.h: Include <bits/uniform_int_dist.h> instead
1621         of <bits/random.h>.
1622         * include/bits/ranges_algobase.h: Do not include <cmath>.
1623         * include/bits/uniform_int_dist.h (uniform_random_bit_generator):
1624         Move here.
1625         * include/std/ranges: Do not include <limits>.
1626         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error lineno.
1627
1628         PR libstdc++/92546 (partial)
1629         * include/Makefile.am: Add new header.
1630         * include/Makefile.in: Regenerate.
1631         * include/bits/int_limits.h: New header.
1632         * include/bits/parse_numbers.h (__select_int::_Select_int): Replace
1633         numeric_limits with __detail::__int_limits.
1634         * include/std/bit (__rotl, __rotr, __countl_zero, __countl_one)
1635         (__countr_zero, __countr_one, __popcount, __ceil2, __floor2, __log2p1):
1636         Likewise.
1637         * include/std/charconv (__to_chars_8, __from_chars_binary)
1638         (__from_chars_alpha_to_num, from_chars): Likewise.
1639         * include/std/memory_resource (polymorphic_allocator::allocate)
1640         (polymorphic_allocator::allocate_object): Likewise.
1641         * include/std/string_view (basic_string_view::_S_compare): Likewise.
1642         * include/std/utility (in_range): Likewise.
1643         * testsuite/20_util/integer_comparisons/in_range_neg.cc: Adjust for
1644         extra error about incomplete type __int_limits<bool>.
1645         * testsuite/26_numerics/bit/bit.count/countl_one.cc: Include <limits>.
1646         * testsuite/26_numerics/bit/bit.count/countl_zero.cc: Likewise.
1647         * testsuite/26_numerics/bit/bit.count/countr_one.cc: Likewise.
1648         * testsuite/26_numerics/bit/bit.count/countr_zero.cc: Likewise.
1649         * testsuite/26_numerics/bit/bit.count/popcount.cc: Likewise.
1650         * testsuite/26_numerics/bit/bit.pow.two/ceil2_neg.cc: Likewise.
1651         * testsuite/26_numerics/bit/bit.pow.two/ceil2.cc: Likewise.
1652         * testsuite/26_numerics/bit/bit.pow.two/floor2.cc: Likewise.
1653         * testsuite/26_numerics/bit/bit.pow.two/ispow2.cc: Likewise.
1654         * testsuite/26_numerics/bit/bit.pow.two/log2p1.cc: Likewise.
1655         * testsuite/26_numerics/bit/bit.rotate/rotl.cc: Likewise.
1656         * testsuite/26_numerics/bit/bit.rotate/rotr.cc: Likewise.
1657
1658         * python/libstdcxx/v6/printers.py (StdCmpCatPrinter.to_string): Update
1659         value for partial_ordering::unordered.
1660
1661         * include/bits/iterator_concepts.h (indirectly_copyable_storable): Add
1662         const-qualified expression variations.
1663         * include/std/concepts (copyable): Likewise.
1664
1665         * include/std/type_traits (__is_standard_integer): New helper trait.
1666         * include/std/utility (cmp_equal, cmp_not_equal, cmp_less, cmp_greater)
1667         (cmp_less_equal, cmp_greater_equal, in_range): Define for C++20.
1668         * include/std/version (__cpp_lib_integer_comparison_functions): Define.
1669         * testsuite/20_util/integer_comparisons/1.cc: New test.
1670         * testsuite/20_util/integer_comparisons/2.cc: New test.
1671         * testsuite/20_util/integer_comparisons/equal.cc: New test.
1672         * testsuite/20_util/integer_comparisons/equal_neg.cc: New test.
1673         * testsuite/20_util/integer_comparisons/greater_equal.cc: New test.
1674         * testsuite/20_util/integer_comparisons/greater_equal_neg.cc: New test.
1675         * testsuite/20_util/integer_comparisons/greater_neg.cc: New test.
1676         * testsuite/20_util/integer_comparisons/in_range.cc: New test.
1677         * testsuite/20_util/integer_comparisons/in_range_neg.cc: New test.
1678         * testsuite/20_util/integer_comparisons/less.cc: New test.
1679         * testsuite/20_util/integer_comparisons/less_equal.cc: New test.
1680         * testsuite/20_util/integer_comparisons/less_equal_neg.cc: New test.
1681         * testsuite/20_util/integer_comparisons/less_neg.cc: New test.
1682         * testsuite/20_util/integer_comparisons/not_equal.cc: New test.
1683         * testsuite/20_util/integer_comparisons/not_equal_neg.cc: New test.
1684
1685 2020-02-16  Patrick Palka  <ppalka@redhat.com>
1686
1687         * include/bits/ranges_algo.h (__lexicographical_compare_fn::operator()):
1688         Move code after an early exit constexpr if to under an else branch.
1689         * include/bits/ranges_algobase.h (__equal_fn::operator()): Likewise.
1690
1691 2020-02-15  Patrick Palka  <ppalka@redhat.com>
1692
1693         * include/bits/ranges_algo.h: Adjust whitespace and formatting.
1694         * include/bits/ranges_algobase.h: Likewise.
1695         * include/bits/ranges_uninitialized.h: Likewise.
1696
1697         * include/bits/ranges_algo.h: (adjacent_find, all_of, any_of,
1698         binary_search, copy_if, count, count_if, equal_range, find, find_end,
1699         find_first_of, find_if, find_if_not, for_each, generate, generate_n,
1700         includes, inplace_merge, is_heap, is_heap_until, is_partitioned,
1701         is_permutation, is_sorted, is_sorted_until, lexicographical_compare,
1702         lower_bound, make_heap, max, max_element, merge, min, min_element,
1703         minmax, minmax_element, mismatch, next_permutation, none_of,
1704         nth_element, partial_sort, partial_sort_copy, partition, partition_copy,
1705         partition_point, pop_heap, prev_permutation, push_heap, remove,
1706         remove_copy, remove_copy_if, remove_if, replace, replace_copy,
1707         replace_copy_if, replace_if, reverse, reverse_copy, rotate, rotate_copy,
1708         search, search_n, set_difference, set_intersection,
1709         set_symmetric_difference, set_union, shuffle, sort, sort_heap,
1710         stable_partition, stable_sort, swap_ranges, transform, unique,
1711         unique_copy, upper_bound): Convert into function objects.
1712         * include/bits/ranges_algobase.h: (equal, copy, move, copy_n, fill_n,
1713         fill, move_backward, copy_backward): Likewise.
1714         * include/bits/ranges_uninitialized.h (uninitialized_default_construct,
1715         uninitialized_default_construct_n, uninitialized_value_construct,
1716         uninitialized_value_construct_n, uninitialized_copy,
1717         uninitialized_copy_n, uninitialized_move, uninitialized_move_n,
1718         uninitialized_fill, uninitialized_fill_n, construct_at, destroy_at,
1719         destroy, destroy_n): Likewise.
1720
1721         * include/bits/ranges_algo.h (ranges::__find_end): Fold into ...
1722         (ranges::find_end): ... here.
1723         (ranges::__lexicographical_compare): Fold into ...
1724         (ranges::lexicographical_compare): ... here.
1725         * include/bits/ranges_algobase.h (ranges::__equal): Fold into ...
1726         (ranges::equal): ... here.
1727
1728 2020-02-15  Jonathan Wakely  <jwakely@redhat.com>
1729
1730         * include/bits/erase_if.h (__cpp_lib_erase_if): Define to 202002L.
1731         * include/std/deque: Likewise.
1732         * include/std/forward_list: Likewise.
1733         * include/std/list: Likewise.
1734         * include/std/string: Likewise.
1735         * include/std/vector: Likewise.
1736         * include/std/version: Likewise.
1737         * testsuite/23_containers/deque/erasure.cc: Test for new value.
1738         * testsuite/23_containers/forward_list/erasure.cc: Likewise.
1739         * testsuite/23_containers/list/erasure.cc: Likewise.
1740         * testsuite/23_containers/map/erasure.cc: Likewise.
1741         * testsuite/23_containers/set/erasure.cc: Likewise.
1742         * testsuite/23_containers/unordered_map/erasure.cc: Likewise.
1743         * testsuite/23_containers/unordered_set/erasure.cc: Likewise.
1744         * testsuite/23_containers/vector/erasure.cc: Likewise.
1745
1746 2020-02-15  Jonathan Wakely  <jwakely@redhat.com>
1747
1748         * include/bits/random.h (uniform_random_bit_generator): Require min()
1749         and max() to be constant expressions and min() to be less than max().
1750         * testsuite/26_numerics/random/concept.cc: Check additional cases.
1751         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error lineno.
1752
1753 2020-02-13  Patrick Palka  <ppalka@redhat.com>
1754
1755         * include/Makefile.am: Add <bits/ranges_uninitialized.h>.
1756         * include/Makefile.in: Regenerate.
1757         * include/bits/ranges_uninitialized.h: New header.
1758         * include/std/memory: Include it.
1759         * testsuite/20_util/specialized_algorithms/destroy/constrained.cc: New
1760         test.
1761         * .../uninitialized_copy/constrained.cc: New test.
1762         * .../uninitialized_default_construct/constrained.cc: New test.
1763         * .../uninitialized_fill/constrained.cc: New test.
1764         * .../uninitialized_move/constrained.cc: New test.
1765         * .../uninitialized_value_construct/constrained.cc: New test.
1766
1767         * include/Makefile.am: Add bits/ranges_algobase.h
1768         * include/Makefile.in: Regenerate.
1769         * bits/ranges_algo.h: Include <bits/ranges_algobase.h> and refactor
1770         existing #includes.
1771         (__detail::__is_normal_iterator, __detail::is_reverse_iterator,
1772         __detail::__is_move_iterator, copy_result, move_result,
1773         __equal, equal, copy_result, move_result, move_backward_result,
1774         copy_backward_result, __copy_or_move_backward, __copy_or_move, copy,
1775         move, copy_backward, move_backward, copy_n_result, copy_n, fill_n,
1776         fill): Split out into ...
1777         * bits/range_algobase.h: ... this new header.
1778
1779 2020-02-12  Patrick Palka  <ppalka@redhat.com>
1780
1781         LWG 3389 and LWG 3390
1782         * include/bits/stl_iterator.h (move_move_iterator): Use std::move when
1783         constructing the move_iterator with __i.
1784         (counted_iterator::counted_iterator): Use std::move when initializing
1785         M_current with __i.
1786         * testsuite/24_iterators/counted_iterator/lwg3389.cc: New test.
1787         * testsuite/24_iterators/move_iterator/lwg3390.cc: New test.
1788
1789 2020-02-12  Sandra Loosemore  <sandra@codesourcery.com>
1790
1791         PR libstdc++/79193
1792         PR libstdc++/88999
1793
1794         * configure: Regenerated.
1795
1796 2020-02-12  François Dumont  <fdumont@gcc.gnu.org>
1797
1798         * include/bits/hashtable.h
1799         (_Hashtable<>(_Hashtable&&, std::allocator_type&)): Add
1800         missing std namespace qualification to forward call.
1801
1802 2020-02-09  Jonathan Wakely  <jwakely@redhat.com>
1803
1804         * testsuite/20_util/function_objects/range.cmp/equal_to.cc: Fix
1805         comment.
1806         * testsuite/20_util/function_objects/range.cmp/less.ccL Likewise.
1807
1808         * include/std/ranges: Fix non-ASCII characters in comment.
1809
1810         * include/bits/range_cmp.h (__detail::__eq_builtin_ptr_cmp): Require
1811         equality comparison to be valid and return bool.
1812         (__detail::__less_builtin_ptr_cmp): Likewise for less-than comparison.
1813         * testsuite/20_util/function_objects/range.cmp/equal_to.cc: Check
1814         type with ambiguous conversion to fundamental types.
1815         * testsuite/20_util/function_objects/range.cmp/less.cc: Likewise.
1816
1817 2020-02-07  Jonathan Wakely  <jwakely@redhat.com>
1818
1819         * include/bits/iterator_concepts.h (iter_difference_t, iter_value_t):
1820         Use remove_cvref_t.
1821         (readable_traits): Rename to indirectly_readable_traits.
1822         (readable): Rename to indirectly_readable.
1823         (writable): Rename to indirectly_writable.
1824         (__detail::__iter_exchange_move): Do not use remove_reference_t.
1825         (indirectly_swappable): Adjust requires expression parameter types.
1826         expression.
1827         * include/bits/ranges_algo.h (ranges::transform, ranges::replace)
1828         (ranges::replace_if, ranges::generate_n, ranges::generate)
1829         (ranges::remove): Use new name for writable.
1830         * include/bits/stl_iterator.h (__detail::__common_iter_has_arrow):
1831         Use new name for readable.
1832         * include/ext/pointer.h (readable_traits<_Pointer_adapter<P>>): Use
1833         new name for readable_traits.
1834         * testsuite/24_iterators/associated_types/readable.traits.cc: Likewise.
1835         * testsuite/24_iterators/indirect_callable/projected.cc: Adjust for
1836         new definition of indirectly_readable.
1837
1838         * include/bits/stl_iterator.h (__detail::__common_iter_ptr): Change
1839         to take parameters of common_iterator, instead of the common_iterator
1840         type itself. Fix argument for __common_iter_has_arrow constraint.
1841         (iterator_traits<common_iterator<I, S>>::pointer): Adjust.
1842
1843 2020-02-07  Jonathan Wakely  <jwakely@redhat.com>
1844
1845         * include/std/ranges (iota_view): Add braces to prevent -Wempty-body
1846         warning.
1847         (basic_istream_view::_Iterator::operator++()): Add missing return.
1848
1849 2020-02-07  Patrick Palka  <ppalka@redhat.com>
1850
1851         * include/bits/ranges_algo.h: Remove extraneous &&.
1852
1853         * include/std/ranges (ranges::__detail::__stream_extractable,
1854         ranges::basic_istream_view, ranges::istream_view): Define.
1855         * testsuite/std/ranges/istream_view: New test.
1856
1857         Implement C++20 range adaptors
1858         * include/std/ranges: Include <bits/refwrap.h> and <tuple>.
1859         (subrange::_S_store_size): Mark as const instead of constexpr to
1860         avoid what seems to be a bug in GCC.
1861         (__detail::__box): Give it defaulted copy and move constructors.
1862         (ranges::views::_Single::operator()): Mark constexpr.
1863         (ranges::views::_Iota::operator()): Mark constexpr.
1864         (__detail::Empty): Define.
1865         (ranges::views::__closure::_RangeAdaptor,
1866         ranges::views::__closure::_RangeAdaptorClosure, ref_view, all_view,
1867         ranges::views::all, ranges::__detail::find_if,
1868         ranges::__detail::find_if_not, ranges::__detail::mismatch,
1869         ranges::detail::min, filter_view, ranges::views::filter, transform_view,
1870         ranges::views::transform, take_view, ranges::views::take,
1871         take_while_view, ranges::views::take_while, drop_view,
1872         ranges::views::drop, join_view, ranges::views::join,
1873         __detail::require_constant, __detail::tiny_range, split_view,
1874         ranges::views::split, ranges::views::_Counted, ranges::views::counted,
1875         common_view, ranges::views::common, reverse_view,
1876         ranges::views::reverse,
1877         ranges::views::__detail::__is_reversible_subrange,
1878         ranges::views::__detail::__is_reverse_view, reverse_view,
1879         ranges::views::reverse, __detail::__has_tuple_element, elements_view,
1880         ranges::views::elements, ranges::views::keys, ranges::views::values):
1881         Define.
1882         (views): Alias for ranges::views.
1883         (tuple_size<ranges::subrange<>>, tuple_element<0, ranges::subrange>,
1884         tuple_element<1, ranges::subrange>): New partial specializations.
1885         * testsuite/std/ranges/adaptors/all.cc: New test.
1886         * testsuite/std/ranges/adaptors/common.cc: Likewise.
1887         * testsuite/std/ranges/adaptors/counted.cc: Likewise.
1888         * testsuite/std/ranges/adaptors/drop.cc: Likewise.
1889         * testsuite/std/ranges/adaptors/drop_while.cc: Likewise.
1890         * testsuite/std/ranges/adaptors/elements.cc: Likewise.
1891         * testsuite/std/ranges/adaptors/filter.cc: Likewise.
1892         * testsuite/std/ranges/adaptors/join.cc: Likewise.
1893         * testsuite/std/ranges/adaptors/reverse.cc: Likewise.
1894         * testsuite/std/ranges/adaptors/split.cc: Likewise.
1895         * testsuite/std/ranges/adaptors/take.cc: Likewise.
1896         * testsuite/std/ranges/adaptors/take_while.cc: Likewise.
1897         * testsuite/std/ranges/adaptors/transform.cc: Likewise.
1898
1899 2020-02-07  Jonathan Wakely  <jwakely@redhat.com>
1900
1901         * libsupc++/compare (__cmp_cat::type): Define typedef for underlying
1902         type of enumerations and comparison category types.
1903         (__cmp_cat::_Ord, __cmp_cat::_Ncmp): Add underlying type.
1904         (__cmp_cat::_Ncmp::unordered): Change value to 2.
1905         (partial_ordering::_M_value, weak_ordering::_M_value)
1906         (strong_ordering::_M_value): Change type to __cmp_cat::type.
1907         (partial_ordering::_M_is_ordered): Remove data member.
1908         (partial_ordering): Use second bit of _M_value for unordered. Adjust
1909         comparison operators.
1910         (weak_ordering::operator partial_ordering): Simplify to remove
1911         branches.
1912         (operator<=>(unspecified, weak_ordering)): Likewise.
1913         (strong_ordering::operator partial_ordering): Likewise.
1914         (strong_ordering::operator weak_ordering): Likewise.
1915         (operator<=>(unspecified, strong_ordering)): Likewise.
1916         * testsuite/18_support/comparisons/categories/partialord.cc: New test.
1917         * testsuite/18_support/comparisons/categories/strongord.cc: New test.
1918         * testsuite/18_support/comparisons/categories/weakord.cc: New test.
1919
1920         * include/std/ranges (iota_view::_Iterator): Fix typo in name of
1921         __cpp_lib_three_way_comparison macro and use deduced return type for
1922         operator<=>.
1923         * testsuite/std/ranges/iota/iterator.cc: New test.
1924
1925 2020-02-07  Patrick Palka  <ppalka@redhat.com>
1926             Jonathan Wakely  <jwakely@redhat.com>
1927
1928         Implement C++20 constrained algorithms
1929         * include/Makefile.am: Add new header.
1930         * include/Makefile.in: Regenerate.
1931         * include/std/algorithm: Include <bits/ranges_algo.h>.
1932         * include/bits/ranges_algo.h: New file.
1933         * testsuite/25_algorithms/adjacent_find/constrained.cc: New test.
1934         * testsuite/25_algorithms/all_of/constrained.cc: New test.
1935         * testsuite/25_algorithms/any_of/constrained.cc: New test.
1936         * testsuite/25_algorithms/binary_search/constrained.cc: New test.
1937         * testsuite/25_algorithms/copy/constrained.cc: New test.
1938         * testsuite/25_algorithms/copy_backward/constrained.cc: New test.
1939         * testsuite/25_algorithms/copy_if/constrained.cc: New test.
1940         * testsuite/25_algorithms/copy_n/constrained.cc: New test.
1941         * testsuite/25_algorithms/count/constrained.cc: New test.
1942         * testsuite/25_algorithms/count_if/constrained.cc: New test.
1943         * testsuite/25_algorithms/equal/constrained.cc: New test.
1944         * testsuite/25_algorithms/equal_range/constrained.cc: New test.
1945         * testsuite/25_algorithms/fill/constrained.cc: New test.
1946         * testsuite/25_algorithms/fill_n/constrained.cc: New test.
1947         * testsuite/25_algorithms/find/constrained.cc: New test.
1948         * testsuite/25_algorithms/find_end/constrained.cc: New test.
1949         * testsuite/25_algorithms/find_first_of/constrained.cc: New test.
1950         * testsuite/25_algorithms/find_if/constrained.cc: New test.
1951         * testsuite/25_algorithms/find_if_not/constrained.cc: New test.
1952         * testsuite/25_algorithms/for_each/constrained.cc: New test.
1953         * testsuite/25_algorithms/generate/constrained.cc: New test.
1954         * testsuite/25_algorithms/generate_n/constrained.cc: New test.
1955         * testsuite/25_algorithms/heap/constrained.cc: New test.
1956         * testsuite/25_algorithms/includes/constrained.cc: New test.
1957         * testsuite/25_algorithms/inplace_merge/constrained.cc: New test.
1958         * testsuite/25_algorithms/is_partitioned/constrained.cc: New test.
1959         * testsuite/25_algorithms/is_permutation/constrained.cc: New test.
1960         * testsuite/25_algorithms/is_sorted/constrained.cc: New test.
1961         * testsuite/25_algorithms/is_sorted_until/constrained.cc: New test.
1962         * testsuite/25_algorithms/lexicographical_compare/constrained.cc: New
1963         test.
1964         * testsuite/25_algorithms/lower_bound/constrained.cc: New test.
1965         * testsuite/25_algorithms/max/constrained.cc: New test.
1966         * testsuite/25_algorithms/max_element/constrained.cc: New test.
1967         * testsuite/25_algorithms/merge/constrained.cc: New test.
1968         * testsuite/25_algorithms/min/constrained.cc: New test.
1969         * testsuite/25_algorithms/min_element/constrained.cc: New test.
1970         * testsuite/25_algorithms/minmax/constrained.cc: New test.
1971         * testsuite/25_algorithms/minmax_element/constrained.cc: New test.
1972         * testsuite/25_algorithms/mismatch/constrained.cc: New test.
1973         * testsuite/25_algorithms/move/constrained.cc: New test.
1974         * testsuite/25_algorithms/move_backward/constrained.cc: New test.
1975         * testsuite/25_algorithms/next_permutation/constrained.cc: New test.
1976         * testsuite/25_algorithms/none_of/constrained.cc: New test.
1977         * testsuite/25_algorithms/nth_element/constrained.cc: New test.
1978         * testsuite/25_algorithms/partial_sort/constrained.cc: New test.
1979         * testsuite/25_algorithms/partial_sort_copy/constrained.cc: New test.
1980         * testsuite/25_algorithms/partition/constrained.cc: New test.
1981         * testsuite/25_algorithms/partition_copy/constrained.cc: New test.
1982         * testsuite/25_algorithms/partition_point/constrained.cc: New test.
1983         * testsuite/25_algorithms/prev_permutation/constrained.cc: New test.
1984         * testsuite/25_algorithms/remove/constrained.cc: New test.
1985         * testsuite/25_algorithms/remove_copy/constrained.cc: New test.
1986         * testsuite/25_algorithms/remove_copy_if/constrained.cc: New test.
1987         * testsuite/25_algorithms/remove_if/constrained.cc: New test.
1988         * testsuite/25_algorithms/replace/constrained.cc: New test.
1989         * testsuite/25_algorithms/replace_copy/constrained.cc: New test.
1990         * testsuite/25_algorithms/replace_copy_if/constrained.cc: New test.
1991         * testsuite/25_algorithms/replace_if/constrained.cc: New test.
1992         * testsuite/25_algorithms/reverse/constrained.cc: New test.
1993         * testsuite/25_algorithms/reverse_copy/constrained.cc: New test.
1994         * testsuite/25_algorithms/rotate/constrained.cc: New test.
1995         * testsuite/25_algorithms/rotate_copy/constrained.cc: New test.
1996         * testsuite/25_algorithms/search/constrained.cc: New test.
1997         * testsuite/25_algorithms/search_n/constrained.cc: New test.
1998         * testsuite/25_algorithms/set_difference/constrained.cc: New test.
1999         * testsuite/25_algorithms/set_intersection/constrained.cc: New test.
2000         * testsuite/25_algorithms/set_symmetric_difference/constrained.cc: New
2001         test.
2002         * testsuite/25_algorithms/set_union/constrained.cc: New test.
2003         * testsuite/25_algorithms/shuffle/constrained.cc: New test.
2004         * testsuite/25_algorithms/sort/constrained.cc: New test.
2005         * testsuite/25_algorithms/stable_partition/constrained.cc: New test.
2006         * testsuite/25_algorithms/stable_sort/constrained.cc: New test.
2007         * testsuite/25_algorithms/swap_ranges/constrained.cc: New test.
2008         * testsuite/25_algorithms/transform/constrained.cc: New test.
2009         * testsuite/25_algorithms/unique/constrained.cc: New test.
2010         * testsuite/25_algorithms/unique_copy/constrained.cc: New test.
2011         * testsuite/25_algorithms/upper_bound/constrained.cc: New test.
2012
2013 2020-02-06  Jonathan Wakely  <jwakely@redhat.com>
2014
2015         * include/bits/stl_iterator.h (__detail::__common_iter_ptr): Fix PR
2016         number in comment. Fix indentation.
2017
2018         * include/bits/stl_algobase.h (__iter_swap, __iter_swap<true>): Remove
2019         redundant _GLIBCXX20_CONSTEXPR.
2020
2021         * include/std/ranges (viewable_range): Replace decay_t with
2022         remove_cvref_t (LWG 3375).
2023
2024 2020-02-05  Jonathan Wakely  <jwakely@redhat.com>
2025
2026         * include/bits/iterator_concepts.h (iter_reference_t)
2027         (iter_rvalue_reference_t, iter_common_reference_t, indirect_result_t):
2028         Remove workarounds for PR c++/67704.
2029         * testsuite/24_iterators/aliases.cc: New test.
2030
2031 2020-02-05  Patrick Palka  <ppalka@redhat.com>
2032
2033         * include/bits/stl_iterator.h (move_iterator::move_iterator): Move __i
2034         when initializing _M_current.
2035         (move_iterator::base): Split into two overloads differing in
2036         ref-qualifiers as in P1207R4 for C++20.
2037
2038 2020-02-04  Jonathan Wakely  <jwakely@redhat.com>
2039
2040         * include/std/functional (_GLIBCXX_NOT_FN_CALL_OP): Un-define after
2041         use.
2042
2043         PR libstdc++/93562
2044         * include/bits/unique_ptr.h (__uniq_ptr_impl::swap): Define.
2045         (unique_ptr::swap, unique_ptr<T[], D>::swap): Call it.
2046         * testsuite/20_util/unique_ptr/modifiers/93562.cc: New test.
2047
2048 2020-02-01  Andrew Burgess  <andrew.burgess@embecosm.com>
2049
2050         * configure: Regenerate.
2051
2052 2020-01-31  Patrick Palka  <ppalka@redhat.com>
2053
2054         * testsuite/24_iterators/range_operations/distance.cc: Do not assume
2055         test_range::end() returns the same type as test_range::begin().
2056         * testsuite/24_iterators/range_operations/next.cc: Likewise.
2057         * testsuite/24_iterators/range_operations/prev.cc: Likewise.
2058         * testsuite/util/testsuite_iterators.h (__gnu_test::test_range::end):
2059         Always return a sentinel<I>.
2060
2061 2020-01-29  Jonathan Wakely  <jwakely@redhat.com>
2062
2063         PR libstdc++/92895
2064         * include/std/stop_token (stop_token::stop_possible()): Call new
2065         _M_stop_possible() function.
2066         (stop_token::stop_requested()): Do not use stop_possible().
2067         (stop_token::binary_semaphore): New class, as temporary stand-in for
2068         std::binary_semaphore.
2069         (stop_token::_Stop_cb::_M_callback): Add noexcept to type.
2070         (stop_token::_Stop_cb::_M_destroyed, stop_token::_Stop_cb::_M_done):
2071         New data members for symchronization with stop_callback destruction.
2072         (stop_token::_Stop_cb::_Stop_cb): Make non-template.
2073         (stop_token::_Stop_cb::_M_linked, stop_token::_Stop_cb::_S_execute):
2074         Remove.
2075         (stop_token::_Stop_cb::_M_run): New member function.
2076         (stop_token::_Stop_state::_M_stopped, stop_token::_Stop_state::_M_mtx):
2077         Remove.
2078         (stop_token::_Stop_state::_M_owners): New data member to track
2079         reference count for ownership.
2080         (stop_token::_Stop_state::_M_value): New data member combining a
2081         spinlock, the stop requested flag, and the reference count for
2082         associated stop_source objects.
2083         (stop_token::_Stop_state::_M_requester): New data member for
2084         synchronization with stop_callback destruction.
2085         (stop_token::_Stop_state::_M_stop_possible()): New member function.
2086         (stop_token::_Stop_state::_M_stop_requested()): Inspect relevant bit
2087         of _M_value.
2088         (stop_token::_Stop_state::_M_add_owner)
2089         (stop_token::_Stop_state::_M_release_ownership)
2090         (stop_token::_Stop_state::_M_add_ssrc)
2091         (stop_token::_Stop_state::_M_sub_ssrc): New member functions for
2092         updating reference counts.
2093         (stop_token::_Stop_state::_M_lock, stop_token::_Stop_state::_M_unlock)
2094         (stop_token::_Stop_state::_M_lock, stop_token::_Stop_state::_M_unlock)
2095         (stop_token::_Stop_state::_M_try_lock)
2096         (stop_token::_Stop_state::_M_try_lock_and_stop)
2097         (stop_token::_Stop_state::_M_do_try_lock): New member functions for
2098         managing spinlock.
2099         (stop_token::_Stop_state::_M_request_stop): Use atomic operations to
2100         read and update state. Release lock while running callbacks. Use new
2101         data members to synchronize with callback destruction.
2102         (stop_token::_Stop_state::_M_remove_callback): Likewise.
2103         (stop_token::_Stop_state::_M_register_callback): Use atomic operations
2104         to read and update state.
2105         (stop_token::_Stop_state_ref): Handle type to manage _Stop_state,
2106         replacing shared_ptr.
2107         (stop_source::stop_source(const stop_source&)): Update reference count.
2108         (stop_source::operator=(const stop_source&)): Likewise.
2109         (stop_source::~stop_source()): Likewise.
2110         (stop_source::stop_source(stop_source&&)): Define as defaulted.
2111         (stop_source::operator=(stop_source&&)): Establish postcondition on
2112         parameter.
2113         (stop_callback): Enforce preconditions on template parameter. Replace
2114         base class with data member of new _Cb_impl type.
2115         (stop_callback::stop_callback(const stop_token&, Cb&&))
2116         (stop_callback::stop_callback(stop_token&&, Cb&&)): Fix TOCTTOU race.
2117         (stop_callback::_Cb_impl): New type wrapping _Callback member and
2118         defining the _S_execute member function.
2119         * testsuite/30_threads/stop_token/stop_callback/deadlock-mt.cc: New
2120         test.
2121         * testsuite/30_threads/stop_token/stop_callback/deadlock.cc: New test.
2122         * testsuite/30_threads/stop_token/stop_callback/destroy.cc: New test.
2123         * testsuite/30_threads/stop_token/stop_callback/destructible_neg.cc:
2124         New test.
2125         * testsuite/30_threads/stop_token/stop_callback/invocable_neg.cc: New
2126         test.
2127         * testsuite/30_threads/stop_token/stop_callback/invoke.cc: New test.
2128         * testsuite/30_threads/stop_token/stop_source/assign.cc: New test.
2129         * testsuite/30_threads/stop_token/stop_token/stop_possible.cc: New
2130         test.
2131
2132         * libsupc++/compare (__detail::__3way_builtin_ptr_cmp): Use
2133         three_way_comparable_with.
2134         (__detail::__3way_cmp_with): Remove workaround for fixed bug.
2135         (compare_three_way::operator()): Remove redundant constraint from
2136         requires-clause.
2137         (__detail::_Synth3way::operator()): Use three_way_comparable_with
2138         instead of workaround.
2139         * testsuite/18_support/comparisons/object/93479.cc: Prune extra
2140         output due to simplified constraints on compare_three_way::operator().
2141
2142         PR libstdc++/93479
2143         * libsupc++/compare (__3way_builtin_ptr_cmp): Require <=> to be valid.
2144         * testsuite/18_support/comparisons/object/93479.cc: New test.
2145
2146         * testsuite/std/ranges/access/end.cc: Do not assume test_range::end()
2147         returns the same type as test_range::begin(). Add comments.
2148         * testsuite/std/ranges/access/rbegin.cc: Likewise.
2149         * testsuite/std/ranges/access/rend.cc: Likewise.
2150         * testsuite/std/ranges/range.cc: Do not assume the sentinel for
2151         test_range is the same as its iterator type.
2152         * testsuite/util/testsuite_iterators.h (test_range::sentinel): Add
2153         operator- overloads to satisfy sized_sentinel_for when the iterator
2154         satisfies random_access_iterator.
2155
2156 2020-01-28  Jonathan Wakely  <jwakely@redhat.com>
2157
2158         PR libstdc++/93470
2159         * include/bits/refwrap.h (reference_wrapper::operator()): Restrict
2160         static assertion to object types.
2161
2162         PR libstdc++/93325
2163         * acinclude.m4 (GLIBCXX_ENABLE_LIBSTDCXX_TIME): Use AC_SEARCH_LIBS for
2164         clock_gettime instead of explicit glibc version check.
2165         * configure: Regenerate.
2166
2167 2020-01-28  Martin Liska  <mliska@suse.cz>
2168
2169         PR libstdc++/93478
2170         * include/std/atomic: Fix typo.
2171         * include/std/optional: Likewise.
2172
2173 2020-01-27  Andrew Burgess  <andrew.burgess@embecosm.com>
2174
2175         * configure: Regenerate.
2176
2177 2020-01-27  Jonathan Wakely  <jwakely@redhat.com>
2178
2179         PR libstdc++/93426
2180         * include/std/span (span): Fix deduction guide.
2181         * testsuite/23_containers/span/deduction.cc: New test.
2182
2183 2020-01-24  Jonathan Wakely  <jwakely@redhat.com>
2184
2185         * libsupc++/compare (__cmp_cat::_Eq): Remove enumeration type.
2186         (__cmp_cat::_Ord::equivalent): Add enumerator.
2187         (__cmp_cat::_Ord::_Less, __cmp_cat::_Ord::_Greater): Rename to less
2188         and greater.
2189         (partial_ordering, weak_ordering, strong_ordering): Remove
2190         constructors taking __cmp_cat::_Eq parameters. Use renamed
2191         enumerators.
2192
2193 2020-01-24  Maciej W. Rozycki  <macro@wdc.com>
2194
2195         * acinclude.m4: Handle `--with-toolexeclibdir='.
2196         * Makefile.in: Regenerate.
2197         * aclocal.m4: Regenerate.
2198         * configure: Regenerate.
2199         * doc/Makefile.in: Regenerate.
2200         * include/Makefile.in: Regenerate.
2201         * libsupc++/Makefile.in: Regenerate.
2202         * po/Makefile.in: Regenerate.
2203         * python/Makefile.in: Regenerate.
2204         * src/Makefile.in: Regenerate.
2205         * src/c++11/Makefile.in: Regenerate.
2206         * src/c++17/Makefile.in: Regenerate.
2207         * src/c++98/Makefile.in: Regenerate.
2208         * src/filesystem/Makefile.in: Regenerate.
2209         * testsuite/Makefile.in: Regenerate.
2210
2211 2020-01-23  Alexandre Oliva <oliva@adacore.com>
2212
2213         * crossconfig.m4 (GLIBCXX_CHECK_MATH_DECL): Reject macros.
2214         * configure: Rebuild.
2215
2216         * testsuite/27_io/fpos/mbstate_t/1.cc: Zero-init mbstate_t.
2217
2218 2020-01-23  Jonathan Wakely  <jwakely@redhat.com>
2219
2220         PR libstdc++/91947
2221         * include/Makefile.am (${host_builddir}/largefile-config.h): Simplify
2222         rule.
2223         * include/Makefile.in: Regenerate.
2224
2225 2020-01-20  Jonathan Wakely  <jwakely@redhat.com>
2226
2227         * doc/xml/faq.xml: Fix grammar.
2228         * doc/xml/manual/appendix_contributing.xml: Improve instructions.
2229         * doc/xml/manual/spine.xml: Update copyright years.
2230         * doc/html/*: Regenerate.
2231
2232 2020-01-19  Eric S. Raymond <esr@thyrsus.com>
2233
2234         * doc/xml/faq.xml: Update for SVN -> Git transition.
2235         * doc/xml/manual/appendix_contributing.xml: Likewise.
2236         * doc/xml/manual/status_cxx1998.xml: Likewise.
2237         * doc/xml/manual/status_cxx2011.xml: Likewise.
2238         * doc/xml/manual/status_cxx2014.xml: Likewise.
2239         * doc/xml/manual/status_cxx2017.xml: Likewise.
2240         * doc/xml/manual/status_cxx2020.xml: Likewise.
2241         * doc/xml/manual/status_cxxtr1.xml: Likewise.
2242         * doc/xml/manual/status_cxxtr24733.xml: Likewise.
2243
2244 2020-01-18  Iain Sandoe  <iain@sandoe.co.uk>
2245
2246         * include/Makefile.am: Add coroutine to the std set.
2247         * include/Makefile.in: Regenerated.
2248         * include/std/coroutine: New file.
2249
2250 2020-01-17  Jonathan Wakely  <jwakely@redhat.com>
2251
2252         PR libstdc++/92376
2253         * include/bits/c++config: Only do PSTL config when the header is
2254         present, to fix freestanding.
2255         * libsupc++/new_opa.cc [!_GLIBCXX_HOSTED]: Declare allocation
2256         functions if they were detected by configure.
2257
2258 2020-01-16  Kai-Uwe Eckhardt  <kuehro@gmx.de>
2259             Matthew Bauer  <mjbauer95@gmail.com>
2260             Jonathan Wakely  <jwakely@redhat.com>
2261
2262         PR bootstrap/64271 (partial)
2263         * config/os/bsd/netbsd/ctype_base.h (ctype_base::mask): Change type
2264         to unsigned short.
2265         (ctype_base::alpha, ctype_base::digit, ctype_base::xdigit)
2266         (ctype_base::print, ctype_base::graph, ctype_base::alnum): Sync
2267         definitions with NetBSD upstream.
2268         (ctype_base::blank): Use _CTYPE_BL.
2269         * config/os/bsd/netbsd/ctype_configure_char.cc (_C_ctype_): Remove
2270         Declaration.
2271         (ctype<char>::classic_table): Use _C_ctype_tab_ instead of _C_ctype_.
2272         (ctype<char>::do_toupper, ctype<char>::do_tolower): Cast char
2273         parameters to unsigned char.
2274         * config/os/bsd/netbsd/ctype_inline.h (ctype<char>::is): Likewise.
2275
2276 2020-01-16  François Dumont  <fdumont@gcc.gnu.org>
2277
2278         PR libstdc++/91263
2279         * include/bits/hashtable.h (_Hashtable<>): Make _Equality<> friend.
2280         * include/bits/hashtable_policy.h: Include <bits/stl_algo.h>.
2281         (_Equality_base): Remove.
2282         (_Equality<>::_M_equal): Review implementation. Use
2283         std::is_permutation.
2284         * testsuite/23_containers/unordered_multiset/operators/1.cc
2285         (Hash, Equal, test02, test03): New.
2286         * testsuite/23_containers/unordered_set/operators/1.cc
2287         (Hash, Equal, test02, test03): New.
2288
2289 2020-01-15  Jonathan Wakely  <jwakely@redhat.com>
2290
2291         PR libstdc++/93267
2292         * include/bits/iterator_concepts.h (__max_diff_type, __max_size_type):
2293         Move here from <bits/range_access.h> and define using __int128 when
2294         available.
2295         (__is_integer_like, __is_signed_integer_like): Move here from
2296         <bits/range_access.h>.
2297         (weakly_incrementable): Use __is_signed_integer_like.
2298         * include/bits/range_access.h (__max_diff_type, __max_size_type)
2299         (__is_integer_like, __is_signed_integer_like): Move to
2300         <bits/iterator_concepts.h>.
2301         (__make_unsigned_like_t): Move here from <ranges>.
2302         * include/std/ranges (__make_unsigned_like_t): Move to
2303         <bits/range_access.h>.
2304         (iota_view): Replace using-directive with using-declarations.
2305         * testsuite/std/ranges/iota/93267.cc: New test.
2306         * testsuite/std/ranges/iota_view.cc: Move to new 'iota' sub-directory.
2307
2308 2020-01-13  Jonathan Wakely  <jwakely@redhat.com>
2309
2310         PR libstdc++/93244
2311         * include/bits/fs_path.h (path::generic_string<C,A>)
2312         [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Convert root-dir to forward-slash.
2313         * testsuite/27_io/filesystem/path/generic/generic_string.cc: Check
2314         root-dir is converted to forward slash in generic pathname.
2315         * testsuite/27_io/filesystem/path/generic/utf.cc: New test.
2316         * testsuite/27_io/filesystem/path/generic/wchar_t.cc: New test.
2317
2318         PR libstdc++/58605
2319         * include/bits/atomic_base.h (__cpp_lib_atomic_value_initialization):
2320         Define.
2321         (__atomic_flag_base, __atomic_base, __atomic_base<_PTp*>)
2322         (__atomic_float): Add default member initializer for C++20.
2323         * include/std/atomic (atomic): Likewise.
2324         (atomic::atomic()): Remove noexcept-specifier on default constructor.
2325         * include/std/version (__cpp_lib_atomic_value_initialization): Define.
2326         * testsuite/29_atomics/atomic/cons/assign_neg.cc: Adjust dg-error line
2327         number.
2328         * testsuite/29_atomics/atomic/cons/copy_neg.cc: Likewise.
2329         * testsuite/29_atomics/atomic/cons/value_init.cc: New test.
2330         * testsuite/29_atomics/atomic_flag/cons/value_init.cc: New test.
2331         * testsuite/29_atomics/atomic_flag/requirements/trivial.cc: Adjust
2332         expected result for is_trivially_default_constructible.
2333         * testsuite/29_atomics/atomic_float/requirements.cc: Likewise.
2334         * testsuite/29_atomics/atomic_float/value_init.cc: New test.
2335         * testsuite/29_atomics/atomic_integral/cons/assign_neg.cc: Likewise.
2336         * testsuite/29_atomics/atomic_integral/cons/copy_neg.cc: Likewise.
2337         * testsuite/29_atomics/atomic_integral/cons/value_init.cc
2338         * testsuite/29_atomics/atomic_integral/requirements/trivial.cc: Adjust
2339         expected results for is_trivially_default_constructible.
2340         * testsuite/util/testsuite_common_types.h (has_trivial_dtor): Add
2341         new test generator.
2342
2343 2020-01-10  Jonathan Wakely  <jwakely@redhat.com>
2344
2345         * testsuite/util/testsuite_iterators.h: Improve comment.
2346
2347         * testsuite/25_algorithms/equal/deque_iterators/1.cc: Don't use C++11
2348         initialization syntax.
2349
2350         PR libstdc++/92285
2351         * include/bits/streambuf_iterator.h (istreambuf_iterator): Make type
2352         of base class independent of __cplusplus value.
2353         [__cplusplus < 201103L] (istreambuf_iterator::reference): Override the
2354         type defined in the base class
2355         * testsuite/24_iterators/istreambuf_iterator/92285.cc: New test.
2356         * testsuite/24_iterators/istreambuf_iterator/requirements/
2357         base_classes.cc: Adjust expected base class for C++98.
2358
2359 2020-01-09  Olivier Hainque  <hainque@adacore.com>
2360
2361         * doc/xml/manual/appendix_contributing.xml: Document _C2
2362         as a reserved identifier, by VxWorks.
2363         * include/bits/stl_map.h: Rename _C2 template typenames as _Cmp2.
2364         * include/bits/stl_multimap.h: Likewise.
2365
2366 2020-01-09  Jonathan Wakely  <jwakely@redhat.com>
2367
2368         * include/ext/extptr_allocator.h (_ExtPtr_allocator::operator==)
2369         (_ExtPtr_allocator::operator!=): Add missing const qualifiers.
2370         * include/ext/pointer.h (readable_traits<_Pointer_adapter<S>>): Add
2371         partial specialization to disambiguate the two constrained
2372         specializations.
2373
2374         * include/experimental/type_traits (experimental::is_pod_v): Disable
2375         -Wdeprecated-declarations warnings around reference to std::is_pod.
2376         * include/std/type_traits (is_pod_v): Likewise.
2377         * testsuite/18_support/max_align_t/requirements/2.cc: Also check
2378         is_standard_layout and is_trivial. Do not check is_pod for C++20.
2379         * testsuite/20_util/is_pod/requirements/explicit_instantiation.cc:
2380         Add -Wno-deprecated for C++20.
2381         * testsuite/20_util/is_pod/requirements/typedefs.cc: Likewise.
2382         * testsuite/20_util/is_pod/value.cc: Likewise.
2383         * testsuite/experimental/type_traits/value.cc: Likewise.
2384
2385 2020-01-09  JeanHeyd "ThePhD" Meneide  <phdofthehouse@gmail.com>
2386
2387         * include/bits/c++config (_GLIBCXX20_DEPRECATED): Add new macro.
2388         * include/std/type_traits (is_pod, is_pod_v): Deprecate for C++20.
2389         * testuite/20_util/is_pod/deprecated-2a.cc: New test.
2390
2391 2020-01-09  Jonathan Wakely  <jwakely@redhat.com>
2392
2393         PR libstdc++/93205
2394         * include/bits/random.h (operator>>): Check stream operation succeeds.
2395         * include/bits/random.tcc (operator<<): Remove redundant __ostream_type
2396         typedefs.
2397         (operator>>): Remove redundant __istream_type typedefs. Check stream
2398         operations succeed.
2399         (__extract_params): New function to fill a vector from a stream.
2400         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error line.
2401
2402         PR libstdc++/93208
2403         * config/abi/pre/gnu.ver: Add new exports.
2404         * include/std/memory_resource (memory_resource::~memory_resource()):
2405         Do not define inline.
2406         (monotonic_buffer_resource::~monotonic_buffer_resource()): Likewise.
2407         * src/c++17/memory_resource.cc (memory_resource::~memory_resource()):
2408         Define.
2409         (monotonic_buffer_resource::~monotonic_buffer_resource()): Define.
2410         * testsuite/20_util/monotonic_buffer_resource/93208.cc: New test.
2411
2412 2020-01-09  François Dumont  <fdumont@gcc.gnu.org>
2413
2414         PR libstdc++/92124
2415         * include/bits/hashtable.h (_Hashtable<>::__alloc_node_gen_t): New
2416         template alias.
2417         (_Hashtable<>::__fwd_value_for): New.
2418         (_Hashtable<>::_M_assign_elements<>): Remove _NodeGenerator template
2419         parameter.
2420         (_Hashtable<>::_M_assign<>): Add _Ht template parameter.
2421         (_Hashtable<>::operator=(const _Hashtable<>&)): Adapt.
2422         (_Hashtable<>::_M_move_assign): Adapt. Replace std::move_if_noexcept
2423         with std::move.
2424         (_Hashtable<>::_Hashtable(const _Hashtable&)): Adapt.
2425         (_Hashtable<>::_Hashtable(const _Hashtable&, const allocator_type&)):
2426         Adapt.
2427         (_Hashtable<>::_Hashtable(_Hashtable&&, const allocator_type&)):
2428         Adapt.
2429         * testsuite/23_containers/unordered_set/92124.cc: New.
2430
2431 2020-01-08  Jonathan Wakely  <jwakely@redhat.com>
2432
2433         PR libstdc++/93201
2434         * src/c++17/fs_ops.cc (do_remove_all): New function implementing more
2435         detailed error reporting for remove_all. Check result of recursive
2436         call before incrementing iterator.
2437         (remove_all(const path&), remove_all(const path&, error_code&)): Use
2438         do_remove_all.
2439         * src/filesystem/ops.cc (remove_all(const path&, error_code&)): Check
2440         result of recursive call before incrementing iterator.
2441         * testsuite/27_io/filesystem/operations/remove_all.cc: Check errors
2442         are reported correctly.
2443         * testsuite/experimental/filesystem/operations/remove_all.cc: Likewise.
2444
2445 2020-01-07  Thomas Rodgers  <trodgers@redhat.com>
2446
2447         * include/std/condition_variable
2448         (condition_variable_any::wait_on): Rename to match current draft
2449         standard.
2450         (condition_variable_any::wait_on_until): Likewise.
2451         (condition_variable_any::wait_on_for): Likewise.
2452         * testsuite/30_threads/condition_variable_any/stop_token/wait_on.cc:
2453         Adjust tests to account for renamed methods.
2454
2455 2020-01-07  François Dumont  <fdumont@gcc.gnu.org>
2456
2457         PR libstdc++/92124
2458         * include/bits/stl_tree.h
2459         (_Rb_tree<>::_M_move_assign(_Rb_tree&, false_type)): Replace
2460         std::move_if_noexcept by std::move.
2461         * testsuite/23_containers/map/92124.cc: New.
2462         * testsuite/23_containers/set/92124.cc: New.
2463
2464 2020-01-06  Jonathan Wakely  <jwakely@redhat.com>
2465
2466         * include/std/stop_token (stop_token): Remove operator!= (LWG 3254).
2467         (stop_source): Likewise (LWG 3362).
2468         * testsuite/30_threads/stop_token/stop_source.cc: Test equality
2469         comparisons.
2470
2471         * include/bits/stl_algobase.h (__is_byte_iter, __min_cmp)
2472         (lexicographical_compare_three_way): Do not depend on
2473         __cpp_lib_concepts.
2474         * include/std/version (__cpp_lib_three_way_comparison): Only define
2475         when __cpp_lib_concepts is defined.
2476         * libsupc++/compare (__cpp_lib_three_way_comparison): Likewise.
2477
2478 2020-01-03  Jonathan Wakely  <jwakely@redhat.com>
2479
2480         * include/bits/stl_algobase.h (lexicographical_compare_three_way):
2481         Only define four-argument overload when __cpp_lib_concepts is defined.
2482
2483 2020-01-01  John David Anglin  <danglin@gcc.gnu.org>
2484
2485         * config/abi/post/hppa-linux-gnu/baseline_symbols.txt: Update.
2486
2487 2020-01-01  Jakub Jelinek  <jakub@redhat.com>
2488
2489         Update copyright years.
2490 \f
2491 Copyright (C) 2020 Free Software Foundation, Inc.
2492
2493 Copying and distribution of this file, with or without modification,
2494 are permitted in any medium without royalty provided the copyright
2495 notice and this notice are preserved.