libstdc++-v3/ChangeLog

   1 2020-11-09  François Dumont  <fdumont@gcc.gnu.org>
   2
   3         * include/debug/array: Remove.
   4         * include/Makefile.am: Remove <debug/array>.
   5         * include/Makefile.in: Regenerate.
   6         * include/experimental/functional: Adapt.
   7         * include/std/array: Move to _GLIBCXX_INLINE_VERSION namespace.
   8         * include/std/functional: Adapt.
   9         * include/std/span: Adapt.
  10         * testsuite/23_containers/array/debug/back1_neg.cc:
  11         Remove dg-require-debug-mode. Add -D_GLIBCXX_ASSERTIONS option.
  12         * testsuite/23_containers/array/debug/back2_neg.cc: Likewise.
  13         * testsuite/23_containers/array/debug/front1_neg.cc: Likewise.
  14         * testsuite/23_containers/array/debug/front2_neg.cc: Likewise.
  15         * testsuite/23_containers/array/debug/square_brackets_operator1_neg.cc:
  16         Likewise.
  17         * testsuite/23_containers/array/debug/square_brackets_operator2_neg.cc:
  18         Likewise.
  19         * testsuite/23_containers/array/element_access/60497.cc
  20         * testsuite/23_containers/array/tuple_interface/get_debug_neg.cc:
  21         Remove.
  22         * testsuite/23_containers/array/tuple_interface/get_neg.cc
  23         * testsuite/23_containers/array/tuple_interface/tuple_element_debug_neg.cc
  24         * testsuite/23_containers/array/tuple_interface/tuple_element_neg.cc
  25
  26 2020-11-09  François Dumont  <fdumont@gcc.gnu.org>
  27
  28         * include/debug/assertions.h (__glibcxx_requires_non_empty_range):
  29         Remove __builtin_expect.
  30         (__glibcxx_requires_subscript): Likewise.
  31         (__glibcxx_requires_nonempty): Likewise.
  32         * include/debug/formatter.h (__check_singular): Add C++11 constexpr
  33         qualification.
  34         * include/debug/helper_functions.h (__check_singular): Likewise. Skip
  35         check if constant evaluated.
  36         (__valid_range): Do not skip check if constant evaluated.
  37         * include/debug/macros.h (_GLIBCXX_DEBUG_VERIFY_COND_AT): Add
  38         __builtin_expect.
  39         (_GLIBCXX_DEBUG_VERIFY_AT_F): Use __glibcxx_assert_1.
  40         * testsuite/21_strings/basic_string_view/element_access/char/back_constexpr_neg.cc:
  41         New test.
  42         * testsuite/21_strings/basic_string_view/element_access/char/constexpr.cc: New test.
  43         * testsuite/21_strings/basic_string_view/element_access/char/constexpr_neg.cc: New test.
  44         * testsuite/21_strings/basic_string_view/element_access/char/front_back_constexpr.cc:
  45         New test.
  46         * testsuite/21_strings/basic_string_view/element_access/char/front_constexpr_neg.cc:
  47         New test.
  48         * testsuite/21_strings/basic_string_view/element_access/wchar_t/back_constexpr_neg.cc:
  49         New test.
  50         * testsuite/21_strings/basic_string_view/element_access/wchar_t/constexpr.cc: New test.
  51         * testsuite/21_strings/basic_string_view/element_access/wchar_t/constexpr_neg.cc: New test.
  52         * testsuite/21_strings/basic_string_view/element_access/wchar_t/front_constexpr_neg.cc:
  53         New test.
  54         * testsuite/25_algorithms/lower_bound/debug/constexpr_partitioned_neg.cc: New test.
  55         * testsuite/25_algorithms/lower_bound/debug/constexpr_partitioned_pred_neg.cc: New test.
  56         * testsuite/25_algorithms/lower_bound/debug/constexpr_valid_range_neg.cc: New test.
  57         * testsuite/25_algorithms/lower_bound/debug/partitioned_neg.cc: New test.
  58         * testsuite/25_algorithms/lower_bound/debug/partitioned_pred_neg.cc: New test.
  59         * testsuite/25_algorithms/upper_bound/debug/constexpr_partitioned_neg.cc: New test.
  60         * testsuite/25_algorithms/upper_bound/debug/constexpr_partitioned_pred_neg.cc: New test.
  61         * testsuite/25_algorithms/upper_bound/debug/constexpr_valid_range_neg.cc: New test.
  62         * testsuite/25_algorithms/upper_bound/debug/partitioned_neg.cc: New test.
  63         * testsuite/25_algorithms/upper_bound/debug/partitioned_pred_neg.cc: New test.
  64
  65 2020-11-09  Jonathan Wakely  <jwakely@redhat.com>
  66
  67         * include/bits/uniform_int_dist.h (__detail::_Power_of_2):
  68         Document that true result for zero is intentional.
  69
  70 2020-11-09  Jonathan Wakely  <jwakely@redhat.com>
  71
  72         * include/std/bit (__popcount): Remove redundant check for zero.
  73
  74 2020-11-09  Jonathan Wakely  <jwakely@redhat.com>
  75
  76         PR libstdc++/97729
  77         * libsupc++/exception_ptr.h (exception_ptr::exception_ptr())
  78         (exception_ptr::exception_ptr(const exception_ptr&))
  79         (exception_ptr::~exception_ptr()): Remove 'always_inline'
  80         attributes. Use 'inline' unconditionally.
  81
  82 2020-11-09  Jonathan Wakely  <jwakely@redhat.com>
  83
  84         PR libstdc++/97758
  85         * include/bits/std_function.h [!__cpp_rtti]: Include <typeinfo>.
  86
  87 2020-11-07  Liu Hao  <lh_mouse@126.com>
  88
  89         * libsupc++/cxxabi.h: (__cxa_atexit): mark with _GLIBCXX_CDTOR_CALLABI
  90         (__cxa_thread_atexit): ditto
  91         * libsupc++/atexit_thread.cc: (__cxa_atexit): mark with
  92         _GLIBCXX_CDTOR_CALLABI
  93         (__cxa_thread_atexit): ditto
  94         (elt): ditto
  95
  96 2020-11-06  Jonathan Wakely  <jwakely@redhat.com>
  97
  98         * config/abi/pre/gnu.ver (GLIBCXX_3.4.21): Tighten up patterns
  99         for basic_stringbuf that refer to __xfer_bufptrs.
 100
 101 2020-11-05  Marek Polacek  <polacek@redhat.com>
 102
 103         PR c++/25814
 104         * testsuite/20_util/reference_wrapper/lwg2993.cc: Add a dg-warning.
 105         * testsuite/25_algorithms/generate_n/87982_neg.cc: Likewise.
 106
 107 2020-11-05  Jonathan Wakely  <jwakely@redhat.com>
 108
 109         PR libstdc++/96269
 110         * include/std/optional (operator==, operator!=, operator<)
 111         (operator>, operator<=, operator>=): Fix types used in
 112         SFINAE constraints.
 113         * testsuite/20_util/optional/relops/96269.cc: New test.
 114
 115 2020-11-05  Jonathan Wakely  <jwakely@redhat.com>
 116
 117         PR libstdc++/97731
 118         * src/filesystem/dir.cc (recursive_directory_iterator): Call the
 119         right overload of _Dir::advance.
 120         * testsuite/experimental/filesystem/iterators/97731.cc: New test.
 121
 122 2020-11-05  Jonathan Wakely  <jwakely@redhat.com>
 123
 124         PR libstdc++/97729
 125         * include/std/future (__basic_future::_M_get_result): Use
 126         nullptr for null pointer constant.
 127         * libsupc++/eh_ptr.cc (operator==, operator!=): Remove
 128         definitions.
 129         * libsupc++/exception_ptr.h (_GLIBCXX_EH_PTR_USED): Define
 130         macro to conditionally add __attribute__((__used__)).
 131         (operator==, operator!=, exception_ptr::exception_ptr())
 132         (exception_ptr::exception_ptr(const exception_ptr&))
 133         (exception_ptr::~exception_ptr())
 134         (exception_ptr::operator=(const exception_ptr&))
 135         (exception_ptr::swap(exception_ptr&)): Always define as
 136         inline. Add macro to be conditionally "used".
 137
 138 2020-11-05  Jonathan Wakely  <jwakely@redhat.com>
 139
 140         PR libstdc++/97729
 141         * config/abi/pre/gnu.ver (GLIBCXX_3.4.29): Add exports.
 142         * src/c++20/sstream-inst.cc (basic_stringbuf): Instantiate
 143         private constructor taking __xfer_bufptrs.
 144
 145 2020-11-05  Jonathan Wakely  <jwakely@redhat.com>
 146
 147         * include/std/sstream (basic_stringbuf(const allocator_type&):
 148         Add explicit.
 149         (basic_stringbuf(const basic_string<C,T,SA>&, openmode, const A&)):
 150         Call _M_stringbuf_init. Construct _M_string from pointer and length
 151         to avoid constraint checks for string view.
 152         (basic_stringbuf::view()): Make __sv_type alias local to the
 153         function.
 154         (basic_istringstream(const basic_string<C,T,SA>&, openmode, const A&)):
 155         Pass string to _M_streambuf instead of constructing a temporary
 156         with the wrong allocator.
 157         (basic_ostringstream(const basic_string<C,T,SA>&, openmode, const A&)):
 158         Likewise.
 159         (basic_stringstream(const basic_string<C,T,SA>&, openmode, const A&)):
 160         Likewise.
 161         * src/c++20/sstream-inst.cc: Use string_view and wstring_view
 162         typedefs in explicit instantiations.
 163         * testsuite/27_io/basic_istringstream/cons/char/1.cc: Add more
 164         tests for constructors.
 165         * testsuite/27_io/basic_ostringstream/cons/char/1.cc: Likewise.
 166         * testsuite/27_io/basic_stringbuf/cons/char/1.cc: Likewise.
 167         * testsuite/27_io/basic_stringbuf/cons/char/2.cc: Likewise.
 168         * testsuite/27_io/basic_stringbuf/cons/wchar_t/1.cc: Likewise.
 169         * testsuite/27_io/basic_stringbuf/cons/wchar_t/2.cc: Likewise.
 170         * testsuite/27_io/basic_stringstream/cons/char/1.cc: Likewise.
 171
 172 2020-11-05  Jonathan Wakely  <jwakely@redhat.com>
 173
 174         * include/std/sstream: Adjust whitespace.
 175
 176 2020-11-04  Jonathan Wakely  <jwakely@redhat.com>
 177
 178         PR libstdc++/97719
 179         * include/std/sstream (basic_stringstream(string_type&&, openmode)):
 180         Fix default argument.
 181         * testsuite/27_io/basic_stringstream/cons/char/97719.cc: New test.
 182
 183 2020-11-04  Jonathan Wakely  <jwakely@redhat.com>
 184
 185         * testsuite/18_support/96817.cc: Fail fast if the library is
 186         configured to not use futexes.
 187
 188 2020-11-04  Jonathan Wakely  <jwakely@redhat.com>
 189
 190         PR libstdc++/94971
 191         * include/bits/stl_algo.h (search(FIter, FIter, const Searcher):
 192         Adjust #if condition.
 193         * include/parallel/algo.h (search(FIter, FIter, const Searcher&):
 194         Define new overload for C++17.
 195
 196 2020-11-04  Jonathan Wakely  <jwakely@redhat.com>
 197
 198         PR libstdc++/92285
 199         * doc/xml/manual/evolution.xml: Document change to base class.
 200         * doc/html/manual/api.html: Regenerate.
 201
 202 2020-11-04  Jonathan Wakely  <jwakely@redhat.com>
 203
 204         * include/bits/uniform_int_dist.h (uniform_int_distribution::_S_nd):
 205         Use qualified-id to refer to static member functions.
 206
 207 2020-11-03  Jonathan Wakely  <jwakely@redhat.com>
 208
 209         * include/std/syncstream: Include <bits/std_mutex.h>
 210         unconditionally.
 211
 212 2020-11-03  François Dumont  <fdumont@gcc.gnu.org>
 213
 214         * config/abi/pre/gnu-versioned-namespace.ver:
 215         Add __istream_extract and _Safe_local_iterator_base::_M_attach_single
 216         symbols.
 217
 218 2020-11-03  Jonathan Wakely  <jwakely@redhat.com>
 219
 220         * src/c++11/mutex.cc [_GLIBCXX_HAVE_TLS] (__once_proxy): Define
 221         separately for TLS targets.
 222         [!_GLIBCXX_HAVE_TLS] (__get_once_functor_lock_ptr): Replace with ...
 223         (set_lock_ptr): ... this. Set new value and return previous
 224         value.
 225         [!_GLIBCXX_HAVE_TLS] (__set_once_functor_lock_ptr): Adjust to
 226         use set_lock_ptr.
 227         [!_GLIBCXX_HAVE_TLS] (__once_proxy): Likewise.
 228
 229 2020-11-03  Jonathan Wakely  <jwakely@redhat.com>
 230
 231         PR libstdc++/55394
 232         PR libstdc++/66146
 233         PR libstdc++/84323
 234         * config/abi/pre/gnu.ver (GLIBCXX_3.4.29): Add new symbols.
 235         * include/std/mutex [!_GLIBCXX_HAS_GTHREADS] (once_flag): Define
 236         even when gthreads is not supported.
 237         (once_flag::_M_once) [_GLIBCXX_HAVE_LINUX_FUTEX]: Change type
 238         from __gthread_once_t to int.
 239         (once_flag::_M_passive(), once_flag::_M_activate())
 240         (once_flag::_M_finish(bool), once_flag::_Active_execution):
 241         Define new members for futex and non-threaded implementation.
 242         [_GLIBCXX_HAS_GTHREADS] (once_flag::_Prepare_execution): New
 243         RAII helper type.
 244         (call_once): Use new members of once_flag.
 245         * src/c++11/mutex.cc (std::once_flag::_M_activate): Define.
 246         (std::once_flag::_M_finish): Define.
 247         * testsuite/30_threads/call_once/39909.cc: Do not require
 248         gthreads.
 249         * testsuite/30_threads/call_once/49668.cc: Likewise.
 250         * testsuite/30_threads/call_once/60497.cc: Likewise.
 251         * testsuite/30_threads/call_once/call_once1.cc: Likewise.
 252         * testsuite/30_threads/call_once/dr2442.cc: Likewise.
 253         * testsuite/30_threads/call_once/once_flag.cc: Add test for
 254         constexpr constructor.
 255         * testsuite/30_threads/call_once/66146.cc: New test.
 256         * testsuite/30_threads/call_once/constexpr.cc: Removed.
 257         * testsuite/30_threads/once_flag/cons/constexpr.cc: Removed.
 258
 259 2020-11-03  Jonathan Yong  <10walls@gmail.com>
 260
 261         * src/Makefile.am (libstdc___la_LINK): Add lt_host_flags.
 262         * src/Makefile.in: Regenerate.
 263
 264 2020-11-02  Thomas Rodgers  <trodgers@redhat.com>
 265
 266         * doc/doxygen/user.cfg.in (INPUT): Add new header.
 267         * include/Makefile.am (std_headers): Add new header.
 268         * include/Makefile.in: Regenerate.
 269         * include/precompiled/stdc++.h: Include new header.
 270         * include/std/syncstream: New header.
 271         * include/std/version: Add __cpp_lib_syncbuf.
 272         * testsuite/27_io/basic_syncbuf/1.cc: New test.
 273         * testsuite/27_io/basic_syncbuf/2.cc: Likewise.
 274         * testsuite/27_io/basic_syncbuf/basic_ops/1.cc:
 275         Likewise.
 276         * testsuite/27_io/basic_syncbuf/requirements/types.cc:
 277         Likewise.
 278         * testsuite/27_io/basic_syncbuf/sync_ops/1.cc:
 279         Likewise.
 280         * testsuite/27_io/basic_syncstream/1.cc: Likewise.
 281         * testsuite/27_io/basic_syncstream/2.cc: Likewise.
 282         * testsuite/27_io/basic_syncstream/basic_ops/1.cc:
 283         Likewise.
 284         * testsuite/27_io/basic_syncstream/requirements/types.cc:
 285         Likewise.
 286
 287 2020-11-01  Jonathan Wakely  <jwakely@redhat.com>
 288
 289         * include/std/type_traits (is_integral<wchar_t>)
 290         (make_unsigned<wchar_t>, make_signed<wchar_t>): Define based
 291         on #ifdef __WCHAR_TYPE__ instead of _GLIBCXX_USE_WCHAR_T.
 292         * include/bits/cpp_type_traits.h (__is_integer<wchar_t>)
 293         (__is_char<wchar_t>): Likewise.
 294
 295 2020-10-31  François Dumont  <fdumont@gcc.gnu.org>
 296
 297         * src/c++17/floating_from_chars.cc (_GLIBCXX_USE_CX11_ABI): Add define.
 298         (buffering_string): New.
 299         [!_GLIBCXX_USE_CXX11_ABI](reserve_string): New.
 300         (from_chars): Adapt.
 301         * src/c++20/sstream-inst.cc: Limit instantiations to
 302         _GLIBCXX_USE_CXX11_ABI.
 303
 304 2020-10-31  Jonathan Wakely  <jwakely@redhat.com>
 305
 306         * include/bits/random.h (independent_bit_engine): Fix typo
 307         in comment.
 308         (shuffle_order_engine): Fix incorrect description in comment.
 309         * include/bits/random.tcc (__representable_as_double
 310         (__p1_representable_as_double): New helper functions.
 311         (shuffle_order_engine::operator()): Use double for calculation
 312         if (max() - min() + 1) is representable as double.
 313         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error
 314         line number.
 315
 316 2020-10-31  Jonathan Wakely  <jwakely@redhat.com>
 317
 318         PR libstdc++/96958
 319         * include/bits/hashtable_policy.h (_Prime_rehash_policy)
 320         (_Power2_rehash_policy): Use ceil and floor instead of ceill and
 321         floorl.
 322         * src/c++11/hashtable_c++0x.cc (_Prime_rehash_policy): Likewise.
 323         Use double instead of long double.
 324
 325 2020-10-31  Patrick Palka  <ppalka@redhat.com>
 326
 327         PR libstdc++/97600
 328         * include/std/ranges (basic_istream_view::begin): Initialize
 329         _Iterator from 'this' instead of '*this'.
 330         (basic_istream_view::_Iterator::_Iterator): Adjust constructor
 331         accordingly.
 332         (filter_view::_Iterator::_Iterator): Take a filter_view*
 333         argument instead of a filter_view& argument.
 334         (filter_view::_Sentinel::_Sentinel): Likewise.
 335         (filter_view::begin): Initialize _Iterator from 'this' instead
 336         of '*this'.
 337         (filter_view::end): Likewise.
 338         (transform_view::_Iterator::_Iterator): Take a _Parent* instead
 339         of a _Parent&.
 340         (filter_view::_Iterator::operator+): Adjust accordingly.
 341         (filter_view::_Iterator::operator-): Likewise.
 342         (filter_view::begin): Initialize _Iterator from 'this' instead
 343         of '*this'.
 344         (filter_view::end): Likewise.
 345         (join_view::_Iterator): Take a _Parent* instead of a _Parent&.
 346         (join_view::_Sentinel): Likewise.
 347         (join_view::begin): Initialize _Iterator from 'this' instead of
 348         '*this'.
 349         (join_view::end): Initialize _Sentinel from 'this' instead of
 350         '*this'.
 351         (split_view::_OuterIter): Take a _Parent& instead of a _Parent*.
 352         (split_view::begin): Initialize _OuterIter from 'this' instead
 353         of '*this'.
 354         (split_view::end): Likewise.
 355         * testsuite/std/ranges/97600.cc: New test.
 356
 357 2020-10-30  Jonathan Wakely  <jwakely@redhat.com>
 358
 359         * include/std/ranges (enable_borrowed_view<take_view<T>>)
 360         (enable_borrowed_view<drop_view<T>>)
 361         (enable_borrowed_view<drop_while_view<T>>)
 362         (enable_borrowed_view<reverse_view<T>>)
 363         (enable_borrowed_view<common_view<T>>)
 364         (enable_borrowed_view<elements_view<T>>): Add partial
 365         specializations as per P2017R1.
 366         * testsuite/std/ranges/adaptors/conditionally_borrowed.cc:
 367         New test.
 368
 369 2020-10-30  Jonathan Wakely  <jwakely@redhat.com>
 370
 371         PR libstdc++/96958
 372         * include/bits/hashtable_policy.h (_Prime_rehash_policy)
 373         (_Power2_rehash_policy): Use double instead of long double.
 374
 375 2020-10-30  Jonathan Wakely  <jwakely@redhat.com>
 376
 377         * testsuite/23_containers/vector/bool/modifiers/insert/31370.cc:
 378         Avoid -Wcatch-value warnings.
 379
 380 2020-10-30  Patrick Palka  <ppalka@redhat.com>
 381
 382         * include/std/ranges (__detail::__box): For the partial
 383         specialization used by types that are already semiregular,
 384         make the default constructor value-initialize the underlying
 385         object instead of default-initializing it.  Make its in place
 386         constructor explicit.
 387         * testsuite/std/ranges/adaptors/detail/semiregular_box.cc:
 388         Augment test.
 389
 390 2020-10-30  David Edelsohn  <dje.gcc@gmail.com>
 391
 392         * testsuite/20_util/unique_ptr/creation/for_overwrite.cc: XFAIL on AIX.
 393
 394 2020-10-29  Jonathan Wakely  <jwakely@redhat.com>
 395
 396         * config/abi/pre/gnu.ver (GLIBCXX_3.4.21): Tighten patterns
 397         for old <sstream> symbols some more.
 398
 399 2020-10-29  Jonathan Wakely  <jwakely@redhat.com>
 400
 401         * include/bits/ranges_util.h (subrange::subrange(R&&)): Use
 402         direct-initialization instead of list-initialization, so a
 403         potential narrowing conversion from ranges::size(r) to the
 404         stored size isn't ill-formed.
 405
 406 2020-10-29  Jonathan Wakely  <jwakely@redhat.com>
 407
 408         * include/bits/parse_numbers.h (_Select_int_base): Avoid
 409         narrowing conversion in constant expression.
 410         * include/experimental/buffer (buffer_copy): Avoid narrowing
 411         conversion.
 412         * include/experimental/internet (hash<>::operator()): Do not
 413         use deprecated 'argument_type' member.
 414         * include/std/variant (variant::emplace): Use cast instead
 415         of implicit conversion from size_t to narrower unsigned type.
 416
 417 2020-10-29  Jonathan Wakely  <jwakely@redhat.com>
 418
 419         * include/tr1/shared_ptr.h (__shared_count, __shared_ptr)
 420         (shared_ptr): Add diagnostic pragmas around uses of auto_ptr.
 421         * testsuite/tr1/2_general_utilities/shared_ptr/cons/43820_neg.cc:
 422         Adust dg-error line numbers.
 423
 424 2020-10-29  Jonathan Wakely  <jwakely@redhat.com>
 425
 426         * testsuite/18_support/96817.cc: Avoid -Wunused warnings.
 427         * testsuite/20_util/any/assign/2.cc: Likewise.
 428         * testsuite/20_util/any/cons/2.cc: Likewise.
 429         * testsuite/20_util/align/1.cc: Avoid -Wsign-compare warning.
 430         * testsuite/20_util/function/65760.cc: Avoid -Wunused warning.
 431         * testsuite/20_util/function/1.cc: Avoid -Wcatch-value warning.
 432         * testsuite/20_util/function/cons/move_target.cc: Avoid -Wunused
 433         warning.
 434         * testsuite/20_util/headers/memory/synopsis.cc: Add exception
 435         specification.
 436         * testsuite/20_util/monotonic_buffer_resource/allocate.cc: Avoid
 437         -Wsign-compare warning.
 438         * testsuite/20_util/tuple/cons/deduction.cc: Avoid -Wunused
 439         warning.
 440         * testsuite/20_util/specialized_algorithms/uninitialized_copy/808590-cxx11.cc:
 441         Avoid -Wdeprecated-copy warning.
 442         * testsuite/21_strings/basic_string/56166.cc: Avoid
 443         -Wcatch-value warning.
 444         * testsuite/21_strings/basic_string/numeric_conversions/char/stod.cc:
 445         Avoid -Wcatch-value warnings.
 446         * testsuite/21_strings/basic_string/numeric_conversions/char/stof.cc:
 447         Likewise.
 448         * testsuite/21_strings/basic_string/numeric_conversions/char/stoi.cc:
 449         Likewise.
 450         * testsuite/21_strings/basic_string/numeric_conversions/char/stol.cc:
 451         Likewise.
 452         * testsuite/21_strings/basic_string/numeric_conversions/char/stold.cc:
 453         Likewise.
 454         * testsuite/21_strings/basic_string/numeric_conversions/char/stoll.cc:
 455         Likewise.
 456         * testsuite/21_strings/basic_string/numeric_conversions/char/stoul.cc:
 457         Likewise.
 458         * testsuite/21_strings/basic_string/numeric_conversions/char/stoull.cc:
 459         Likewise.
 460         * testsuite/21_strings/basic_string/numeric_conversions/wchar_t/stod.cc:
 461         Likewise.
 462         * testsuite/21_strings/basic_string/numeric_conversions/wchar_t/stof.cc:
 463         Likewise.
 464         * testsuite/21_strings/basic_string/numeric_conversions/wchar_t/stoi.cc:
 465         Likewise.
 466         * testsuite/21_strings/basic_string/numeric_conversions/wchar_t/stol.cc:
 467         Likewise.
 468         * testsuite/21_strings/basic_string/numeric_conversions/wchar_t/stold.cc:
 469         Likewise.
 470         * testsuite/21_strings/basic_string/numeric_conversions/wchar_t/stoll.cc:
 471         Likewise.
 472         * testsuite/21_strings/basic_string/numeric_conversions/wchar_t/stoul.cc:
 473         Likewise.
 474         * testsuite/21_strings/basic_string/numeric_conversions/wchar_t/stoull.cc:
 475         Likewise.
 476         * testsuite/21_strings/basic_string_view/operations/compare/char/nonnull.cc:
 477         Prune additional diagnostics.
 478         * testsuite/21_strings/basic_string_view/operations/find/char/nonnull.cc:
 479         Likewise.
 480         * testsuite/21_strings/basic_string_view/operations/rfind/char/nonnull.cc:
 481         Likewise.
 482         * testsuite/21_strings/headers/string/synopsis.cc: Add exception
 483         specifications.
 484         * testsuite/22_locale/locale/cons/12352.cc: Define sized
 485         delete operators to avoid warnings.
 486         * testsuite/23_containers/deque/modifiers/swap/1.cc: Add
 487         exception specification.
 488         * testsuite/23_containers/forward_list/cons/11.cc: Avoid
 489         -Wdeprecated-copy warning.
 490         * testsuite/23_containers/headers/bitset/synopsis.cc: Add
 491         exception specification.
 492         * testsuite/23_containers/headers/deque/synopsis.cc: Likewise.
 493         * testsuite/23_containers/headers/forward_list/synopsis.cc:
 494         Likewise.
 495         * testsuite/23_containers/headers/list/synopsis.cc: Likewise.
 496         * testsuite/23_containers/headers/map/synopsis.cc: Likewise.
 497         * testsuite/23_containers/headers/queue/synopsis.cc: Likewise.
 498         * testsuite/23_containers/headers/set/synopsis.cc: Likewise.
 499         * testsuite/23_containers/headers/vector/synopsis.cc: Likewise.
 500         * testsuite/23_containers/list/modifiers/swap/1.cc: Likewise.
 501         * testsuite/23_containers/map/modifiers/swap/1.cc: Likewise.
 502         * testsuite/23_containers/multimap/modifiers/swap/1.cc:
 503         Likewise.
 504         * testsuite/23_containers/multiset/modifiers/swap/1.cc:
 505         Likewise.
 506         * testsuite/23_containers/set/modifiers/swap/1.cc: Likewise.
 507         * testsuite/23_containers/unordered_set/56267-2.cc: Avoid
 508         -Wdeprecated-copy warning.
 509         * testsuite/23_containers/vector/bool/23632.cc: Avoid
 510         -Wempty-body warning.
 511         * testsuite/23_containers/vector/modifiers/swap/1.cc: Add
 512         exception specification.
 513         * testsuite/25_algorithms/heap/moveable2.cc: Fix misplaced
 514         parentheses around arguments.
 515         * testsuite/25_algorithms/sample/1.cc: Use return value.
 516         * testsuite/25_algorithms/search/searcher.cc: Avoid -Wunused
 517         warnings.
 518         * testsuite/27_io/basic_ostream/exceptions/char/9561.cc:
 519         Likewise.
 520         * testsuite/27_io/basic_ostream/exceptions/wchar_t/9561.cc:
 521         Likewise.
 522         * testsuite/27_io/filesystem/operations/remove_all.cc: Avoid
 523         -Wsign-compare warning.
 524         * testsuite/experimental/any/assign/2.cc: Avoid -Wunused warnings.
 525         * testsuite/experimental/any/cons/2.cc: Likewise.
 526         * testsuite/experimental/filesystem/operations/remove_all.cc:
 527         Avoid -Wign-compare warning.
 528         * testsuite/experimental/memory/observer_ptr/cons/cons.cc:
 529         Likewise.
 530         * testsuite/experimental/memory_resource/null_memory_resource.cc:
 531         Likewise.
 532         * testsuite/experimental/source_location/1.cc: Avoid -Waddress
 533         warning.
 534         * testsuite/ext/pod_char_traits.cc: Avoid -Wunused warning.
 535         * testsuite/ext/vstring/modifiers/clear/56166.cc: Avoid
 536         -Wcatch-value.
 537         * testsuite/std/concepts/concepts.lang/concept.swappable/swap.cc:
 538         Avoid -Wunused warning.
 539         * testsuite/std/concepts/concepts.lang/concept.swappable/swappable.cc:
 540         Likewise.
 541         * testsuite/tr1/2_general_utilities/shared_ptr/cons/43820_neg.cc:
 542         Prune additional warnings.
 543         * testsuite/tr1/3_function_objects/function/1.cc: Avoid
 544         -Wcatch-value warning.
 545         * testsuite/util/replacement_memory_operators.h: Define sized
 546         delete to avoid warnings.
 547         * testsuite/util/testsuite_api.h (_NonDefaultConstructible): Add
 548         user-declared assignment operator to stop -Wdeprecated-copy
 549         warnings.
 550         * testsuite/util/testsuite_containers.h: Avoid -Wunused warning.
 551         * testsuite/util/testsuite_iterators.h: Avoid -Wsign-compare
 552         warnings.
 553         * testsuite/util/testsuite_new_operators.h: Define sized deleted.
 554
 555 2020-10-29  Jonathan Wakely  <jwakely@redhat.com>
 556
 557         * testsuite/25_algorithms/all_of/constexpr.cc: Check result of
 558         the algorithm.
 559         * testsuite/25_algorithms/any_of/constexpr.cc: Likewise.
 560         * testsuite/25_algorithms/binary_search/constexpr.cc: Likewise.
 561         * testsuite/25_algorithms/copy_backward/constexpr.cc: Likewise.
 562         * testsuite/25_algorithms/count/constexpr.cc: Likewise.
 563         * testsuite/25_algorithms/equal/constexpr.cc: Likewise.
 564         * testsuite/25_algorithms/equal_range/constexpr.cc: Likewise.
 565         * testsuite/25_algorithms/fill/constexpr.cc: Likewise.
 566         * testsuite/25_algorithms/find_end/constexpr.cc: Likewise.
 567         * testsuite/25_algorithms/find_if/constexpr.cc: Likewise.
 568         * testsuite/25_algorithms/is_partitioned/constexpr.cc: Likewise.
 569         * testsuite/25_algorithms/is_permutation/constexpr.cc: Likewise.
 570         * testsuite/25_algorithms/is_sorted_until/constexpr.cc:
 571         Likewise.
 572         * testsuite/25_algorithms/lexicographical_compare/constexpr.cc:
 573         Likewise.
 574         * testsuite/25_algorithms/lower_bound/constexpr.cc: Likewise.
 575         * testsuite/25_algorithms/merge/constexpr.cc: Likewise.
 576         * testsuite/25_algorithms/mismatch/constexpr.cc: Likewise.
 577         * testsuite/25_algorithms/none_of/constexpr.cc: Likewise.
 578         * testsuite/25_algorithms/partition_copy/constexpr.cc: Likewise.
 579         * testsuite/25_algorithms/remove_copy/constexpr.cc: Likewise.
 580         * testsuite/25_algorithms/remove_copy_if/constexpr.cc: Likewise.
 581         * testsuite/25_algorithms/remove_if/constexpr.cc: Likewise.
 582         * testsuite/25_algorithms/replace_if/constexpr.cc: Likewise.
 583         * testsuite/25_algorithms/reverse/constexpr.cc: Likewise.
 584         * testsuite/25_algorithms/reverse_copy/constexpr.cc: Likewise.
 585         * testsuite/25_algorithms/rotate_copy/constexpr.cc: Likewise.
 586         * testsuite/25_algorithms/search/constexpr.cc: Likewise.
 587         * testsuite/25_algorithms/set_difference/constexpr.cc: Likewise.
 588         * testsuite/25_algorithms/set_intersection/constexpr.cc:
 589         Likewise.
 590         * testsuite/25_algorithms/set_symmetric_difference/constexpr.cc:
 591         Likewise.
 592         * testsuite/25_algorithms/set_union/constexpr.cc: Likewise.
 593         * testsuite/25_algorithms/unique_copy/constexpr.cc: Likewise.
 594         * testsuite/25_algorithms/upper_bound/constexpr.cc: Likewise.
 595
 596 2020-10-29  Jonathan Wakely  <jwakely@redhat.com>
 597
 598         * include/bits/uniform_int_dist.h (_Power_of_two): Add
 599         constexpr.
 600         (uniform_int_distribution::_S_nd): Add static_assert to ensure
 601         the wider type is twice as wide as the result type.
 602         (uniform_int_distribution::__generate_impl): Add static_assert
 603         and declare variables as constexpr where appropriate.
 604         (uniform_int_distribution:operator()): Likewise. Only consider
 605         the uniform random bit generator's range of possible results
 606         when deciding whether _S_nd can be used, not the __uctype type.
 607
 608 2020-10-29  Jonathan Wakely  <jwakely@redhat.com>
 609
 610         * include/ext/rope (_Refcount_Base::_M_ref_count): Remove
 611         volatile qualifier.
 612         (_Refcount_Base::_M_decr()): Likewise.
 613
 614 2020-10-29  Jonathan Wakely  <jwakely@redhat.com>
 615
 616         * include/bits/std_function.h (_Function_handler<void, void>):
 617         Define explicit specialization used for invalid target types.
 618         (_Base_manager::_M_manager) [!__cpp_rtti]: Return null.
 619         (function::target_type()): Check for null pointer.
 620         (function::target()): Define unconditionall. Fix bug with
 621         const_cast of function pointer type.
 622         (function::target() const): Define unconditionally, but
 623         only use RTTI if enabled.
 624         * testsuite/20_util/function/target_no_rtti.cc: New test.
 625
 626 2020-10-29  Patrick Palka  <ppalka@redhat.com>
 627
 628         * testsuite/25_algorithms/lexicographical_compare/constrained.cc:
 629         (test03): Fix initializing the vector vy with the array y of size 4.
 630
 631 2020-10-29  Jonathan Wakely  <jwakely@redhat.com>
 632
 633         * include/bits/hashtable_policy.h (_Local_iterator_base): Cast
 634         value to avoid -Wsign-compare warnings.
 635         * include/bits/regex.h (sub_match::_M_str): Avoid narrowing
 636         conversion.
 637         * include/bits/regex_compiler.tcc (_Compiler::_M_quantifier):
 638         Initialize variable to avoid -Wmaybe-uninitialized warning.
 639         * include/bits/shared_ptr_base.h (_Sp_counted_deleter::_Impl):
 640         Reorder mem-initializer-list to avoid -Wreorder warning.
 641         * include/bits/stl_tree.h (_Rb_tree_impl): Explicitly
 642         initialize base class in copy constructor.
 643         * include/debug/safe_iterator.h (_Safe_iterator): Likewise.
 644         * include/ext/debug_allocator.h: Reorder mem-initializer-list
 645         to avoid -Wreorder warning.
 646         * include/ext/throw_allocator.h (throw_allocator_limit)
 647         (throw_allocator_random): Add user-declared assignment operators
 648         to avoid -Wdeprecated-copy warnings.
 649
 650 2020-10-29  Jonathan Wakely  <jwakely@redhat.com>
 651
 652         * include/bits/uniform_int_dist.h (uniform_int_distribution):
 653         Rename _UniformRandomNumberGenerator template parameters to
 654         _UniformRandomBitGenerator, as per P0346R1.
 655
 656 2020-10-29  Jonathan Wakely  <jwakely@redhat.com>
 657
 658         * include/std/sstream (basic_stringbuf(__string_type&&, openmode)):
 659         Call _M_init_syncbuf to set up get/put areas. Also qualify
 660         std::move.
 661
 662 2020-10-28  Jonathan Wakely  <jwakely@redhat.com>
 663
 664         * config/abi/pre/gnu.ver (GLIBCXX_3.4.29): Remove duplicate
 665         patterns.
 666         (CXXABI_1.3.13): Restore missing piece.
 667
 668 2020-10-28  Thomas Rodgers  <trodgers@redhat.com>
 669
 670         * acinclude.m4 (glibcxx_SUBDIRS): Add src/c++20.
 671         * config/abi/pre/gnu.ver (GLIBCXX_3.4.29): New symbols.
 672         * configure: Regenerate.
 673         * include/std/sstream:
 674         (basic_stringbuf::basic_stringbuf(allocator const&)): New constructor.
 675         (basic_stringbuf::basic_stringbuf(openmode, allocator const&)): Likewise.
 676         (basic_stringbuf::basic_stringbuf(basic_string&&, openmode)): Likewise.
 677         (basic_stringbuf::basic_stringbuf(basic_stringbuf&&, allocator const&)):
 678         Likewise.
 679         (basic_stringbuf::get_allocator()): New method.
 680         (basic_stringbuf::view()): Likewise.
 681         (basic_istringstream::basic_istringstream(basic_string&&, openmode)):
 682         New constructor.
 683         (basic_istringstream::basic_istringstream(openmode, allocator const&)):
 684         Likewise
 685         (basic_istringstream::view()): New method.
 686         (basic_ostringstream::basic_ostringstream(basic_string&&, openmode)):
 687         New constructor.
 688         (basic_ostringstream::basic_ostringstream(openmode, allocator const&)):
 689         Likewise
 690         (basic_ostringstream::view()): New method.
 691         (basic_stringstream::basic_stringstream(basic_string&&, openmode)):
 692         New constructor.
 693         (basic_stringstream::basic_stringstream(openmode, allocator const&)):
 694         Likewise
 695         (basic_stringstream::view()): New method.
 696         * src/Makefile.in: Add c++20 directory.
 697         * src/Makefile.am: Regenerate.
 698         * src/c++20/Makefile.am: Add makefile for new sub-directory.
 699         * src/c++20/Makefile.in: Generate.
 700         * src/c++20/sstream-inst.cc: New file defining explicit
 701         instantiations for basic_stringbuf, basic_istringstream,
 702         basic_ostringstream, and basic_stringstream member functions
 703         added in C++20.
 704         * testsuite/27_io/basic_stringbuf/cons/char/2.cc: New test.
 705         * testsuite/27_io/basic_stringbuf/cons/wchar_t/2.cc: Likewise.
 706         * testsuite/27_io/basic_stringbuf/view/char/1.cc: Likewise.
 707         * testsuite/27_io/basic_stringbuf/view/wchar_t/1.cc: Likewise.
 708         * testsuite/27_io/basic_istringstream/cons/char/1.cc: Likewise.
 709         * testsuite/27_io/basic_istringstream/cons/wchar_t/1.cc: Likewise.
 710         * testsuite/27_io/basic_istringstream/view/char/1.cc: Likewise.
 711         * testsuite/27_io/basic_istringstream/view/wchar_t/1.cc: Likewise.
 712         * testsuite/27_io/basic_ostringstream/cons/char/1.cc: Likewise.
 713         * testsuite/27_io/basic_ostringstream/cons/wchar_t/1.cc: Likewise.
 714         * testsuite/27_io/basic_ostringstream/view/char/1.cc: Likewise.
 715         * testsuite/27_io/basic_ostringstream/view/wchar_t/1.cc: Likewise.
 716         * testsuite/27_io/basic_stringstream/cons/char/1.cc: Likewise.
 717         * testsuite/27_io/basic_stringstream/cons/wchar_t/1.cc: Likewise.
 718         * testsuite/27_io/basic_stringstream/view/char/1.cc: Likewise.
 719         * testsuite/27_io/basic_stringstream/view/wchar_t/1.cc: Likewise.
 720
 721 2020-10-28  Patrick Palka  <ppalka@redhat.com>
 722
 723         PR libstdc++/97613
 724         * include/std/chrono (year_month_weekday::operator sys_days):
 725         Cast the result of index() to int so that the initializer for
 726         days{} is sign-extended when it's converted to the underlying
 727         type.
 728         * testsuite/std/time/year_month_weekday/3.cc: New test.
 729
 730 2020-10-28  Jonathan Wakely  <jwakely@redhat.com>
 731
 732         * libsupc++/new_opnt.cc (new): Add comment about forced unwind
 733         exceptions.
 734
 735 2020-10-28  Jonathan Wakely  <jwakely@redhat.com>
 736
 737         PR libstdc++/94268
 738         * config/os/mingw32-w64/os_defines.h (_GLIBCXX_BUFSIZ):
 739         Define.
 740         * config/os/mingw32/os_defines.h (_GLIBCXX_BUFSIZ):
 741         Define.
 742         * include/bits/fstream.tcc: Use _GLIBCXX_BUFSIZ instead
 743         of BUFSIZ.
 744         * include/ext/stdio_filebuf.h: Likewise.
 745         * include/std/fstream (_GLIBCXX_BUFSIZ): Define.
 746
 747 2020-10-28  Jonathan Wakely  <jwakely@redhat.com>
 748
 749         PR libstdc++/95592
 750         * include/bits/valarray_after.h (_DEFINE_EXPR_UNARY_OPERATOR)
 751         (_DEFINE_EXPR_BINARY_OPERATOR, _DEFINE_EXPR_BINARY_FUNCTION):
 752         Use elaborated-type-specifier and qualified-id to avoid
 753         ambiguities with QNX system headers.
 754         * testsuite/26_numerics/valarray/95592.cc: New test.
 755
 756 2020-10-28  Jonathan Wakely  <jwakely@redhat.com>
 757
 758         PR libstdc++/95609
 759         * include/std/span (span): Reorder data members to match common
 760         implementations of struct iovec.
 761         * testsuite/23_containers/span/layout_compat.cc: New test.
 762
 763 2020-10-27  Jonathan Wakely  <jwakely@redhat.com>
 764
 765         * include/std/functional (std::_Placeholder): Define for C++98
 766         as well as later standards.
 767         * include/tr1/functional (std::placeholders::_1 etc): Declare
 768         for C++98.
 769         (tr1::_Placeholder): Replace with using-declaration for
 770         std::_Placeholder.
 771         (tr1::placeholders::_1 etc.): Replace with using-directive for
 772         std::placeholders.
 773
 774 2020-10-27  Jonathan Wakely  <jwakely@redhat.com>
 775
 776         * include/tr1/ell_integral.tcc (__ellint_rf, __ellint_rd)
 777         (__ellint_rc, __ellint_rj): Remove unused variables.
 778         * include/tr1/modified_bessel_func.tcc (__airy): Likewise.
 779
 780 2020-10-27  Jonathan Wakely  <jwakely@redhat.com>
 781
 782         * include/bits/locale_conv.h (__str_codecvt_out_all):
 783         Add cast to compare operands of the same signedness.
 784         * include/bits/locale_facets_nonio.tcc
 785         (time_get::_M_extract_wday_or_month): Likewise.
 786         * include/bits/sstream.tcc (basic_stringbuf::overflow):
 787         Likewise.
 788         * include/tr1/legendre_function.tcc (__sph_legendre): Use
 789         unsigned for loop variable.
 790
 791 2020-10-27  Jonathan Wakely  <jwakely@redhat.com>
 792
 793         * include/std/charconv (from_chars): Add noexcept to match
 794         definitions in src/c++17/floating_from_chars.cc
 795
 796 2020-10-27  Jonathan Wakely  <jwakely@redhat.com>
 797
 798         * src/c++17/fs_dir.cc (fs::directory_iterator::operator*):
 799         Add noexcept. Do not throw on precondition violation.
 800
 801 2020-10-27  Jonathan Wakely  <jwakely@redhat.com>
 802
 803         * include/bits/fs_path.h (path::_List::begin, path::_List::end):
 804         Add noexcept to match definitions in src/c++17/fs_path.cc.
 805
 806 2020-10-27  Jonathan Wakely  <jwakely@redhat.com>
 807
 808         * testsuite/experimental/memory_resource/new_delete_resource.cc:
 809         Add missing <cstdint> header.
 810         * testsuite/experimental/memory_resource/resource_adaptor.cc:
 811         Likewise.
 812
 813 2020-10-26  Jonathan Wakely  <jwakely@redhat.com>
 814
 815         * include/experimental/executor (strand::_State): Fix thinko.
 816
 817 2020-10-26  Ville Voutilainen  <ville.voutilainen@gmail.com>
 818
 819         * include/std/type_traits (__is_nt_constructible_impl): Remove.
 820         (__is_nothrow_constructible_impl): Adjust.
 821         (is_nothrow_default_constructible): Likewise.
 822         (__is_nt_assignable_impl): Remove.
 823         (__is_nothrow_assignable_impl): Adjust.
 824
 825 2020-10-26  Jonathan Wakely  <jwakely@redhat.com>
 826
 827         PR libstdc++/97570
 828         * libsupc++/new_opa.cc: Declare size_t in global namespace.
 829         Remove unused header.
 830
 831 2020-10-26  Stephan Bergmann  <sbergman@redhat.com>
 832
 833         * include/bits/shared_ptr_base.h
 834         (_Sp_counted_base::_M_add_ref_lock_nothrow(): Add noexcept to
 835         definitions to match declaration.
 836         (__shared_count(const __weak_count&, nothrow_t)): Add noexcept
 837         to declaration to match definition.
 838
 839 2020-10-23  Patrick Palka  <ppalka@redhat.com>
 840
 841         * include/std/ranges (single_view::single_view): Mark the
 842         in place constructor explicit as per LWG 3428.
 843         (take_view): Remove the constraint on the deduction guide's
 844         template parameter as per LWG 3447.
 845
 846 2020-10-23  Jonathan Wakely  <jwakely@redhat.com>
 847
 848         * include/experimental/memory_resource: Include <tuple>.
 849         (polymorphic_allocator::construct): Qualify forward_as_tuple.
 850         * include/std/memory_resource: Likewise.
 851
 852 2020-10-22  Jonathan Wakely  <jwakely@redhat.com>
 853
 854         * testsuite/30_threads/condition_variable/members/68519.cc:
 855         Define recent_epoch_float_clock::duration to meet the Cpp17Clock
 856         requirements.
 857
 858 2020-10-22  Jonathan Wakely  <jwakely@redhat.com>
 859
 860         * include/std/shared_mutex: Only include <condition_variable>
 861         when pthread_rwlock_t and POSIX timers are not available.
 862         (__cpp_lib_shared_mutex, __cpp_lib_shared_timed_mutex): Change
 863         value to be type 'long'.
 864         * include/std/version (__cpp_lib_shared_mutex)
 865         (__cpp_lib_shared_timed_mutex): Likewise.
 866
 867 2020-10-22  Jonathan Wakely  <jwakely@redhat.com>
 868
 869         * include/Makefile.am: Add new header.
 870         * include/Makefile.in: Regenerate.
 871         * include/bits/shared_ptr.h: Include <iosfwd>.
 872         * include/bits/shared_ptr_base.h: Include required headers here
 873         directly, instead of in <memory>.
 874         * include/bits/uses_allocator_args.h: New file. Move utility
 875         functions for uses-allocator construction from <memory> to here.
 876         Only define the utility functions when concepts are available.
 877         (__cpp_lib_make_obj_using_allocator): Define non-standard
 878         feature test macro.
 879         * include/std/condition_variable: Remove unused headers.
 880         * include/std/future: Likewise.
 881         * include/std/memory: Remove headers that are not needed
 882         directly, and are now inclkuded where they're needed. Include
 883         new <bits/uses_allocator_args.h> header.
 884         * include/std/memory_resource: Include only the necessary
 885         headers. Use new feature test macro to detect support for the
 886         utility functions.
 887         * include/std/scoped_allocator: Likewise.
 888         * include/std/version (__cpp_lib_make_obj_using_allocator):
 889         Define.
 890
 891 2020-10-22  Olivier Hainque  <hainque@adacore.com>
 892
 893         * crossconfig.m4: Turn vxworks matcher into vxworks*.
 894         * configure.host: Likewise.
 895         * configure: Regenerate.
 896
 897 2020-10-21  Jonathan Wakely  <jwakely@redhat.com>
 898
 899         * include/bits/shared_ptr.h (shared_ptr(const weak_ptr&, nothrow_t)):
 900         Add noexcept.
 901         * include/bits/shared_ptr_base.h (_Sp_counted_base::_M_add_ref_lock):
 902         Remove specializations and just call _M_add_ref_lock_nothrow.
 903         (__shared_count, __shared_ptr): Use nullptr for null pointer
 904         constants.
 905         (__shared_count(const __weak_count&)): Use _M_add_ref_lock_nothrow
 906         instead of _M_add_ref_lock.
 907         (__shared_count(const __weak_count&, nothrow_t)): Add noexcept.
 908         (__shared_ptr::operator bool()): Add noexcept.
 909         (__shared_ptr(const __weak_ptr&, nothrow_t)): Add noexcept.
 910
 911 2020-10-21  Jonathan Wakely  <jwakely@redhat.com>
 912
 913         PR libstdc++/97512
 914         * include/bits/ranges_util.h (tuple_size<subrange>)
 915         (tuple_element<I, cv subrange>): Move here from ...
 916         * include/std/ranges: ... here.
 917         * testsuite/std/ranges/subrange/97512.cc: New test.
 918
 919 2020-10-21  Thomas Rodgers  <trodgers@redhat.com>
 920
 921         * include/pstl/algorithm_impl.h: Update file.
 922         * include/pstl/execution_impl.h: Likewise.
 923         * include/pstl/glue_algorithm_impl.h: Likewise.
 924         * include/pstl/glue_memory_impl.h: Likewise.
 925         * include/pstl/glue_numeric_impl.h: Likewise.
 926         * include/pstl/memory_impl.h: Likewise.
 927         * include/pstl/numeric_impl.h: Likewise.
 928         * include/pstl/parallel_backend.h: Likewise.
 929         * include/pstl/parallel_backend_serial.h: Likewise.
 930         * include/pstl/parallel_backend_tbb.h: Likewise.
 931         * include/pstl/parallel_backend_utils.h: Likewise.
 932         * include/pstl/pstl_config.h: Likewise.
 933         * include/pstl/unseq_backend_simd.h: Likewise.
 934
 935 2020-10-20  François Dumont  <fdumont@gcc.gnu.org>
 936
 937         * include/bits/hashtable_policy.h
 938         (_Hash_node_value_base<>): Remove _Hash_node_base inheritance.
 939         (_Hash_node_code_cache<bool _Cache_hash_code>): New.
 940         (_Hash_node_value<typename _Value, bool _Cache_hash_code>): New.
 941         (_Hash_node<>): Inherits _Hash_node_base<> and _Hash_node_value<>.
 942         (_Map_base<>::__node_type): Remove.
 943         (_Map_base<>::iterator): Remove.
 944         (_Insert_base<>::__hash_cached): New.
 945         (_Insert_base<>::__constant_iterators): New.
 946         (_Insert_base<>::__hashtable_alloc): New.
 947         (_Insert_base<>::__node_type): Remove.
 948         (_Insert_base<>::__node_ptr): New.
 949         (_Hash_code_base<>): Remove specializations.
 950         (_Hash_code_base<>::__node_type): Remove.
 951         (_Hash_code_base<>::_M_bucket_index(const __node_type*, size_t)):
 952         Replace by...
 953         (_Hash_code_base<>::_M_bucket_index(const _Hash_node_value<>&, size_t)):
 954         ...this.
 955         (_Hash_code_base<>::_M_store_code(__node_type*, __hash_code)):
 956         Replace by...
 957         (_Hash_code_base<>::_M_store_code(_Hash_node_code_cache<>&, __hash_code)):
 958         ...this.
 959         (_Hash_code_base<>::_M_copy_code(__node_type*, const __node_type*)):
 960         Replace by...
 961         (_Hash_code_base<>::_M_copy_code(_Hash_node_code_cache<>&,
 962         const _Hash_node_code_base<>&)): ...this.
 963         (_Hashtable_base<>::__constant_iterators): Remove.
 964         (_Hashtable_base<>::__unique_keys): Remove.
 965         (_Hashtable_base<>::__node_type): Remove.
 966         (_Hashtable_base<>::iterator): Remove.
 967         (_Hashtable_base<>::const_iterator): Remove.
 968         (_Hashtable_base<>::local_iterator): Remove.
 969         (_Hashtable_base<>::const_local_iterator): Remove.
 970         (_Hashtable_base<>::__ireturn_type): Remove.
 971         (_Hashtable_base<>::_Equal_hash_code<>::_S_equals): Replace by...
 972         (_Hashtable_base<>::_S_equals(__hash_code, const _Hash_node_code_hash<>&)):
 973         ...this.
 974         (_Hashtable_base<>::_Equal_hash_code<>::_S_node_equals): Replace by...
 975         (_Hashtable_base<>::_S_node_equals(__hash_code,
 976         const _Hash_node_code_hash<>&)): ...this.
 977         (_Hashtable_base<>::_Equal_hash_code<>): Remove.
 978         (_Hashtable_base<>::_M_equals): Adapt.
 979         (_Hashtable_baxe<>::_M_node_equals): Adapt.
 980         (_Equality<>::_M_equal): Adapt.
 981         (_Hashtable_alloc<>::__node_ptr): New.
 982         (_Hashtable_alloc<>::__bucket_type): Rename into...
 983         (_Hashtable_alloc<>::__node_base_ptr): ...this.
 984         (_Hashtable_alloc<>::__bucket_alloc_type): Rename into...
 985         (_Hashtable_alloc<>::__buckets_alloc_type): ...this.
 986         (_Hashtable_alloc<>::__bucket_alloc_traits): Rename into...
 987         (_Hashtable_alloc<>::__buckets_alloc_traits): ...this.
 988         (_Hashtable_alloc<>::__buckets_ptr): New.
 989         (_Hashtable_alloc<>::_M_allocate_node): Adapt.
 990         (_Hashtable_alloc<>::_M_deallocate_node): Adapt.
 991         (_Hashtable_alloc<>::_M_deallocate_node_ptr): Adapt.
 992         (_Hashtable_alloc<>::_M_deallocate_nodes): Adapt.
 993         (_Hashtable_alloc<>::_M_allocate_buckets): Adapt.
 994         (_Hashtable_alloc<>::_M_deallocate_buckets): Adapt.
 995         * include/bits/hashtable.h (_Hashtable<>): Adapt.
 996
 997 2020-10-20  Aldy Hernandez  <aldyh@redhat.com>
 998
 999         * testsuite/21_strings/basic_string/capacity/1.cc: Pass
1000         -Wno-stringop-overflow to test.
1001
1002 2020-10-20  Jonathan Wakely  <jwakely@redhat.com>
1003
1004         PR libstdc++/95917
1005         * include/std/coroutine (__noop_coro_frame): Replace with
1006         noop_coroutine_handle::__frame.
1007         (__dummy_resume_destroy): Define inline in __frame.
1008         (__noop_coro_fr): Replace with noop_coroutine_handle::_S_fr
1009         and define as inline.
1010         * testsuite/18_support/coroutines/95917.cc: New test.
1011
1012 2020-10-20  Jonathan Wakely  <jwakely@redhat.com>
1013
1014         * include/std/coroutine (coroutine_handle<_Promise>): Remove
1015         base class. Add constructors, conversions, accessors etc. as
1016         proposed for LWG 3460.
1017         (coroutine_handle<noop_coroutine_promise>): Likewise.
1018         * testsuite/18_support/coroutines/lwg3460.cc: New test.
1019
1020 2020-10-19  Jonathan Wakely  <jwakely@redhat.com>
1021
1022         * include/bits/unique_ptr.h (make_unique_for_overwrite): Define
1023         for C++20.
1024         * testsuite/20_util/unique_ptr/creation/array_neg.cc: Remove
1025         unused header. Adjust standard reference.
1026         * testsuite/20_util/unique_ptr/creation/for_overwrite.cc: New test.
1027         * testsuite/20_util/unique_ptr/creation/for_overwrite__neg.cc: New test.
1028
1029 2020-10-19  Jonathan Wakely  <jwakely@redhat.com>
1030
1031         * include/std/tuple (_Head_base<Idx, Head, true>): Use reserved
1032         form of __no_unique_address__ attribute because
1033         no_unique_address is not reserved prior to C++20.
1034
1035 2020-10-19  Jonathan Wakely  <jwakely@redhat.com>
1036
1037         * include/bits/node_handle.h (_Node_handle_common): Replace
1038         std::optional with custom type.
1039         * testsuite/20_util/variant/exception_safety.cc: Add missing
1040         header include.
1041
1042 2020-10-19  Jonathan Wakely  <jwakely@redhat.com>
1043
1044         * include/precompiled/expc++.h: Removed.
1045
1046 2020-10-17  Ville Voutilainen  <ville.voutilainen@gmail.com>
1047
1048         PR libstdc++/97449
1049         * include/std/variant
1050         (__gen_vtable_impl<>::_S_apply_single_alt):
1051         Diagnose visitor return type mismatches here..
1052         (__gen_vtable_impl</*base case*/>::_S_apply):
1053         ..not here.
1054
1055 2020-10-15  Jonathan Wakely  <jwakely@redhat.com>
1056
1057         * include/std/concepts: Fix typos in copyright notice.
1058         * include/std/ranges: Likewise.
1059
1060 2020-10-14  Jonathan Wakely  <jwakely@redhat.com>
1061
1062         PR libstdc++/97415
1063         * include/std/sstream (basic_stringbuf::str()): Check for
1064         null egptr() before comparing to non-null pptr().
1065
1066 2020-10-14  Jonathan Wakely  <jwakely@redhat.com>
1067
1068         * testsuite/21_strings/basic_string/modifiers/assign/char/move_assign_optim.cc:
1069         Do not generate debug info.
1070         * testsuite/21_strings/basic_string/modifiers/assign/wchar_t/move_assign_optim.cc:
1071         Likewise.
1072
1073 2020-10-14  Jonathan Wakely  <jwakely@redhat.com>
1074
1075         * include/bits/basic_string.h (basic_string(const Alloc&))
1076         (basic_string(const basic_string&)
1077         (basic_string(const CharT*, size_type, const Alloc&))
1078         (basic_string(const CharT*, const Alloc&))
1079         (basic_string(size_type, CharT, const Alloc&))
1080         (basic_string(initializer_list<CharT>, const Alloc&))
1081         (basic_string(InputIterator, InputIterator, const Alloc&)):
1082         Define inline in class body.
1083         * include/bits/basic_string.tcc (basic_string(const Alloc&))
1084         (basic_string(const basic_string&)
1085         (basic_string(const CharT*, size_type, const Alloc&))
1086         (basic_string(const CharT*, const Alloc&))
1087         (basic_string(size_type, CharT, const Alloc&))
1088         (basic_string(initializer_list<CharT>, const Alloc&))
1089         (basic_string(InputIterator, InputIterator, const Alloc&)):
1090         Move definitions into class body.
1091
1092 2020-10-14  Jonathan Wakely  <jwakely@redhat.com>
1093
1094         * testsuite/lib/libstdc++.exp (check_effective_target_cxx11-abi):
1095         Add comments about which test flags get used by the check.
1096
1097 2020-10-14  Jonathan Wakely  <jwakely@redhat.com>
1098
1099         * testsuite/21_strings/basic_string/allocator/char/copy.cc: Make
1100         comment more precise about what isn't supported by COW strings.
1101         * testsuite/21_strings/basic_string/allocator/char/copy_assign.cc:
1102         Likewise.
1103         * testsuite/21_strings/basic_string/allocator/char/move.cc:
1104         Likewise.
1105         * testsuite/21_strings/basic_string/allocator/char/move_assign.cc:
1106         Likewise.
1107         * testsuite/21_strings/basic_string/allocator/char/noexcept.cc:
1108         Likewise.
1109         * testsuite/21_strings/basic_string/allocator/char/operator_plus.cc:
1110         Likewise.
1111         * testsuite/21_strings/basic_string/allocator/char/swap.cc:
1112         Likewise.
1113         * testsuite/21_strings/basic_string/allocator/wchar_t/copy.cc:
1114         Likewise.
1115         * testsuite/21_strings/basic_string/allocator/wchar_t/copy_assign.cc:
1116         Likewise.
1117         * testsuite/21_strings/basic_string/allocator/wchar_t/move.cc:
1118         Likewise.
1119         * testsuite/21_strings/basic_string/allocator/wchar_t/move_assign.cc:
1120         Likewise.
1121         * testsuite/21_strings/basic_string/allocator/wchar_t/noexcept.cc:
1122         Likewise.
1123         * testsuite/21_strings/basic_string/allocator/wchar_t/operator_plus.cc:
1124         Likewise.
1125         * testsuite/21_strings/basic_string/allocator/wchar_t/swap.cc:
1126         Likewise.
1127
1128 2020-10-14  Jonathan Wakely  <jwakely@redhat.com>
1129
1130         * testsuite/21_strings/basic_string/allocator/char/minimal.cc:
1131         Do not require cxx11-abi effective target.
1132         * testsuite/21_strings/basic_string/allocator/wchar_t/minimal.cc:
1133         Likewise.
1134         * testsuite/27_io/basic_fstream/cons/base.cc: Likewise.
1135
1136 2020-10-14  Jonathan Wakely  <jwakely@redhat.com>
1137
1138         * include/bits/basic_string.h [!_GLIBCXX_USE_CXX11_ABI]
1139         (basic_string(const _CharT*, const _Alloc&)): Constrain to
1140         require an allocator-like type to fix CTAD ambiguity (LWG 3706).
1141         * testsuite/21_strings/basic_string/cons/char/deduction.cc:
1142         Remove dg-skip-if.
1143         * testsuite/21_strings/basic_string/cons/wchar_t/deduction.cc:
1144         Likewise.
1145
1146 2020-10-13  Nuno Lopes  <nuno.lopes@ist.utl.pt>
1147
1148         * include/bits/stl_algo.h (any_of): Fix incorrect description
1149         in comment.
1150
1151 2020-10-13  Jonathan Wakely  <jwakely@redhat.com>
1152
1153         * doc/xml/manual/evolution.xml: Document some API changes
1154         and deprecations.
1155         * doc/xml/manual/intro.xml: Document LWG 2499.
1156         * doc/xml/manual/status_cxx2020.xml: Update status.
1157         * doc/html/*: Regenerate.
1158
1159 2020-10-13  Jonathan Wakely  <jwakely@redhat.com>
1160
1161         * doc/xml/book.txml: Remove trailing whitespace.
1162         * doc/xml/chapter.txml: Likewise.
1163         * doc/xml/class.txml: Likewise.
1164         * doc/xml/gnu/fdl-1.3.xml: Likewise.
1165         * doc/xml/gnu/gpl-3.0.xml: Likewise.
1166         * doc/xml/manual/abi.xml: Likewise.
1167         * doc/xml/manual/algorithms.xml: Likewise.
1168         * doc/xml/manual/allocator.xml: Likewise.
1169         * doc/xml/manual/appendix_contributing.xml: Likewise.
1170         * doc/xml/manual/appendix_free.xml: Likewise.
1171         * doc/xml/manual/appendix_porting.xml: Likewise.
1172         * doc/xml/manual/atomics.xml: Likewise.
1173         * doc/xml/manual/auto_ptr.xml: Likewise.
1174         * doc/xml/manual/backwards_compatibility.xml: Likewise.
1175         * doc/xml/manual/bitmap_allocator.xml: Likewise.
1176         * doc/xml/manual/build_hacking.xml: Likewise.
1177         * doc/xml/manual/codecvt.xml: Likewise.
1178         * doc/xml/manual/concurrency.xml: Likewise.
1179         * doc/xml/manual/concurrency_extensions.xml: Likewise.
1180         * doc/xml/manual/configure.xml: Likewise.
1181         * doc/xml/manual/containers.xml: Likewise.
1182         * doc/xml/manual/ctype.xml: Likewise.
1183         * doc/xml/manual/debug.xml: Likewise.
1184         * doc/xml/manual/debug_mode.xml: Likewise.
1185         * doc/xml/manual/diagnostics.xml: Likewise.
1186         * doc/xml/manual/documentation_hacking.xml: Likewise.
1187         * doc/xml/manual/evolution.xml: Likewise.
1188         * doc/xml/manual/internals.xml: Likewise.
1189         * doc/xml/manual/intro.xml: Likewise.
1190         * doc/xml/manual/io.xml: Likewise.
1191         * doc/xml/manual/iterators.xml: Likewise.
1192         * doc/xml/manual/locale.xml: Likewise.
1193         * doc/xml/manual/localization.xml: Likewise.
1194         * doc/xml/manual/messages.xml: Likewise.
1195         * doc/xml/manual/mt_allocator.xml: Likewise.
1196         * doc/xml/manual/numerics.xml: Likewise.
1197         * doc/xml/manual/parallel_mode.xml: Likewise.
1198         * doc/xml/manual/policy_data_structures.xml: Likewise.
1199         * doc/xml/manual/prerequisites.xml: Likewise.
1200         * doc/xml/manual/shared_ptr.xml: Likewise.
1201         * doc/xml/manual/spine.xml: Likewise.
1202         * doc/xml/manual/status_cxxtr1.xml: Likewise.
1203         * doc/xml/manual/status_cxxtr24733.xml: Likewise.
1204         * doc/xml/manual/strings.xml: Likewise.
1205         * doc/xml/manual/support.xml: Likewise.
1206         * doc/xml/manual/test.xml: Likewise.
1207         * doc/xml/manual/test_policy_data_structures.xml: Likewise.
1208         * doc/xml/manual/using.xml: Likewise.
1209         * doc/xml/manual/using_exceptions.xml: Likewise.
1210         * doc/xml/manual/utilities.xml: Likewise.
1211         * doc/html/*: Regenerate.
1212
1213 2020-10-12  Patrick Palka  <ppalka@redhat.com>
1214
1215         * include/std/ranges (take_while_view::begin): Constrain the
1216         const overload further as per LWG 3450.
1217         (take_while_view::end): Likewise.
1218         * testsuite/std/ranges/adaptors/take_while.cc: Add test for LWG
1219         3450.
1220
1221 2020-10-12  Patrick Palka  <ppalka@redhat.com>
1222
1223         PR libstdc++/95322
1224         * include/std/ranges (take_view::_CI): Define this alias
1225         template as per LWG 3449 and remove ...
1226         (take_view::_Sentinel::_CI): ... this type alias.
1227         (take_view::_Sentinel::operator==): Adjust use of _CI
1228         accordingly.  Define a second overload that accepts an iterator
1229         of the opposite constness as per LWG 3449.
1230         (take_while_view::_Sentinel::operator==): Likewise.
1231         * testsuite/std/ranges/adaptors/95322.cc: Add tests for LWG 3449.
1232
1233 2020-10-12  Jonathan Wakely  <jwakely@redhat.com>
1234
1235         * doc/doxygen/user.cfg.in: Update to Doxygen 1.8.20 format.
1236
1237 2020-10-12  Jonathan Wakely  <jwakely@redhat.com>
1238
1239         * doc/doxygen/user.cfg.in (PREDEFINED): Use __cplusplus=201703L
1240         so that C++17 features are documented.
1241
1242 2020-10-12  Jonathan Wakely  <jwakely@redhat.com>
1243
1244         * include/bits/stl_algobase.h (copy, move, copy_backward)
1245         (move_backward): Fix documentation for returned iterator.
1246
1247 2020-10-12  Martin Sebor  <msebor@redhat.com>
1248
1249         PR c++/97201
1250         * libsupc++/new (operator new): Add attribute alloc_size and malloc.
1251
1252 2020-10-11  Clement Chigot  <clement.chigot@atos.net>
1253
1254         * config/os/aix/t-aix: Add complementary mode object file to
1255         libstdc++fs.a
1256
1257 2020-10-10  Jonathan Wakely  <jwakely@redhat.com>
1258
1259         PR libstdc++/97362
1260         * doc/html/manual/source_code_style.html: Regenerate.
1261         * doc/xml/manual/appendix_contributing.xml: Add __deref to
1262         BADNAMES.
1263         * include/debug/functions.h (_Irreflexive_checker::__deref):
1264         Rename to __ref.
1265         * testsuite/17_intro/badnames.cc: Check __deref.
1266
1267 2020-10-10  Ville Voutilainen  <ville.voutilainen@gmail.com>
1268
1269         * include/std/variant (__check_visitor_result):
1270         Use size_t for indexes.
1271         (__check_visitor_results): Likewise.
1272
1273 2020-10-09  Ville Voutilainen  <ville.voutilainen@gmail.com>
1274
1275         PR libstdc++/95904
1276         * include/std/variant (__deduce_visit_result): Add a nested ::type.
1277         (__gen_vtable_impl</*base case*/>::_S_apply):
1278         Check the visitor return type.
1279         (__same_types): New.
1280         (__check_visitor_result): Likewise.
1281         (__check_visitor_results): Likewise.
1282         (visit(_Visitor&&, _Variants&&...)): Use __check_visitor_results
1283         in case we're visiting just one variant.
1284         * testsuite/20_util/variant/visit_neg.cc: Adjust.
1285
1286 2020-10-09  Jonathan Wakely  <jwakely@redhat.com>
1287
1288         PR libstdc++/97311
1289         * include/bits/random.tcc (seed_seq::generate): Use uint32_t for
1290         calculations. Also split the first loop into three loops to
1291         avoid branching on k on every iteration, resolving PR 94823.
1292         * testsuite/26_numerics/random/seed_seq/97311.cc: New test.
1293         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-erro
1294         line number.
1295
1296 2020-10-09  Daniel Lemire  <lemire@gmail.com>
1297
1298         * include/bits/uniform_int_dist.h (uniform_int_distribution::_S_nd):
1299         New member function implementing Lemire's "nearly divisionless"
1300         algorithm.
1301         (uniform_int_distribution::operator()): Use _S_nd when the range
1302         of the URBG is the full width of the result type.
1303
1304 2020-10-09  Jonathan Wakely  <jwakely@redhat.com>
1305
1306         * testsuite/Makefile.am: Set and export variable separately.
1307         * testsuite/Makefile.in: Regenerate.
1308
1309 2020-10-09  Jonathan Wakely  <jwakely@redhat.com>
1310
1311         * scripts/check_performance: Use gnu++11 instead of gnu++0x.
1312         * testsuite/Makefile.am (check-performance): Export CXXFLAGS to
1313         child process.
1314         * testsuite/Makefile.in: Regenerate.
1315
1316 2020-10-09  Jonathan Wakely  <jwakely@redhat.com>
1317
1318         * testsuite/performance/26_numerics/random_dist.cc: New test.
1319
1320 2020-10-09  Jonathan Wakely  <jwakely@redhat.com>
1321
1322         * testsuite/util/testsuite_performance.h (report_header): Remove
1323         unused variable.
1324
1325 2020-10-08  Patrick Palka  <ppalka@redhat.com>
1326
1327         PR libstdc++/95788
1328         * include/bits/ranges_uninitialized.h:
1329         (__construct_at_fn::operator()): Rewrite in terms of
1330         std::construct_at.  Declare it conditionally noexcept.  Qualify
1331         calls to declval in its requires-clause.
1332         * testsuite/20_util/specialized_algorithms/construct_at/95788.cc:
1333         New test.
1334
1335 2020-10-08  Jonathan Wakely  <jwakely@redhat.com>
1336
1337         PR libstdc++/82584
1338         * include/bits/random.tcc
1339         (discrete_distribution::param_type::_M_initialize)
1340         (piecewise_constant_distribution::param_type::_M_initialize)
1341         (piecewise_linear_distribution::param_type::_M_initialize):
1342         Add assertions for positive sums..
1343         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error
1344         line.
1345
1346 2020-10-08  Jonathan Wakely  <jwakely@redhat.com>
1347
1348         * include/bits/ios_base.h (ios_base::failure): Add constructors
1349         takeing error_code argument. Add code() member function.
1350         * testsuite/27_io/ios_base/failure/cxx11.cc: Allow test to
1351         run for the old ABI but do not check for derivation from
1352         std::system_error.
1353         * testsuite/27_io/ios_base/failure/error_code.cc: New test.
1354
1355 2020-10-08  Jonathan Wakely  <jwakely@redhat.com>
1356
1357         * include/bits/random.h (__detail::_Mod): Revert last change.
1358         (__detail::__mod): Do not use _Mod for a==0 case.
1359         * testsuite/26_numerics/random/linear_congruential_engine/operators/call.cc:
1360         Check other cases with a==0. Also check runtime results.
1361         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error
1362         line.
1363
1364 2020-10-07  Jonathan Wakely  <jwakely@redhat.com>
1365
1366         * include/bits/random.h (__detail::_Mod): Avoid divide by zero.
1367         * testsuite/26_numerics/random/linear_congruential_engine/operators/call.cc:
1368         New test.
1369
1370 2020-10-07  Jonathan Wakely  <jwakely@redhat.com>
1371
1372         * include/bits/random.h (seed_seq(initializer_list<T>)): Rename
1373         parameter to use reserved name.
1374         * include/bits/ranges_algo.h (shift_left, shift_right): Rename
1375         template parameters to use reserved name.
1376         * libsupc++/exception_ptr.h (exception_ptr): Likewise for
1377         parameters and local variables.
1378         * testsuite/17_intro/names.cc: Check "il". Do not check "d" and
1379         "y" in C++20 mode.
1380
1381 2020-10-06  Jonathan Wakely  <jwakely@redhat.com>
1382
1383         PR libstdc++/90295
1384         * config/abi/pre/gnu.ver (CXXABI_1.3.13): New symbol version.
1385         (exception_ptr::_M_addref(), exception_ptr::_M_release()):
1386         Export symbols.
1387         * libsupc++/eh_ptr.cc (exception_ptr::exception_ptr()):
1388         Remove out-of-line definition.
1389         (exception_ptr::exception_ptr(const exception_ptr&)):
1390         Likewise.
1391         (exception_ptr::~exception_ptr()): Likewise.
1392         (exception_ptr::operator=(const exception_ptr&)):
1393         Likewise.
1394         (exception_ptr::swap(exception_ptr&)): Likewise.
1395         (exception_ptr::_M_addref()): Add branch prediction.
1396         * libsupc++/exception_ptr.h (exception_ptr::operator bool):
1397         Add noexcept.
1398         [!_GLIBCXX_EH_PTR_COMPAT] (operator==, operator!=): Define
1399         inline as hidden friends. Remove declarations at namespace
1400         scope.
1401         (exception_ptr::exception_ptr()): Define inline.
1402         (exception_ptr::exception_ptr(const exception_ptr&)):
1403         Likewise.
1404         (exception_ptr::~exception_ptr()): Likewise.
1405         (exception_ptr::operator=(const exception_ptr&)):
1406         Likewise.
1407         (exception_ptr::swap(exception_ptr&)): Likewise.
1408         * testsuite/util/testsuite_abi.cc: Add CXXABI_1.3.13.
1409         * testsuite/18_support/exception_ptr/90295.cc: New test.
1410
1411 2020-10-06  Jonathan Wakely  <jwakely@redhat.com>
1412
1413         * include/std/ranges (join_view): Remove deduction guide.
1414         (views::join): Add explicit template argument list to prevent
1415         deducing the wrong type.
1416         * testsuite/std/ranges/adaptors/join.cc: Move test for LWG 3474
1417         here, from ...
1418         * testsuite/std/ranges/adaptors/join_lwg3474.cc: Removed.
1419
1420 2020-10-05  Jonathan Wakely  <jwakely@redhat.com>
1421
1422         * include/bits/regex.h: Use __int_traits<int> instead of
1423         std::numeric_limits<int>.
1424         * include/bits/uniform_int_dist.h: Use __int_traits<T>::__max
1425         instead of std::numeric_limits<T>::max().
1426         * include/bits/hashtable_policy.h: Use size_t(-1) instead of
1427         std::numeric_limits<size_t>::max().
1428         * include/std/regex: Include <ext/numeric_traits.h>.
1429         * include/std/string_view: Use typedef for __int_traits<int>.
1430         * src/c++11/hashtable_c++0x.cc: Use size_t(-1) instead of
1431         std::numeric_limits<size_t>::max().
1432         * testsuite/std/ranges/iota/96042.cc: Include <limits>.
1433         * testsuite/std/ranges/iota/difference_type.cc: Likewise.
1434         * testsuite/std/ranges/subrange/96042.cc: Likewise.
1435
1436 2020-10-05  Jonathan Wakely  <jwakely@redhat.com>
1437
1438         * include/std/numeric: Move all #include directives to the top
1439         of the header.
1440         * testsuite/26_numerics/gcd/gcd_neg.cc: Adjust dg-error line
1441         numbers.
1442         * testsuite/26_numerics/lcm/lcm_neg.cc: Likewise.
1443
1444 2020-10-05  Jonathan Wakely  <jwakely@redhat.com>
1445
1446         * config/abi/pre/gnu.ver: Add new symbol.
1447         * include/bits/functexcept.h (__throw_bad_array_new_length):
1448         Declare new function.
1449         * include/ext/malloc_allocator.h (malloc_allocator::allocate):
1450         Throw bad_array_new_length for impossible sizes (LWG 3190).
1451         * include/ext/new_allocator.h (new_allocator::allocate):
1452         Likewise.
1453         * include/std/memory_resource (polymorphic_allocator::allocate)
1454         (polymorphic_allocator::allocate_object): Use new function,
1455         __throw_bad_array_new_length.
1456         * src/c++11/functexcept.cc (__throw_bad_array_new_length):
1457         Define.
1458         * testsuite/20_util/allocator/lwg3190.cc: New test.
1459
1460 2020-10-05  Mike Crowe  <mac@mcrowe.com>
1461
1462         PR libstdc++/91486
1463         * include/bits/atomic_futex.h:
1464         (__atomic_futex_unsigned::_M_load_when_equal_until): Use target
1465         clock duration type when rounding.
1466         * testsuite/30_threads/async/async.cc (test_pr91486_wait_for):
1467         Rename from test_pr91486.
1468         (float_steady_clock): New class for test.
1469         (test_pr91486_wait_until): New test.
1470
1471 2020-10-05  Mike Crowe  <mac@mcrowe.com>
1472
1473         * testsuite/20_util/duration_cast/rounding_c++11.cc: Copy
1474         rounding.cc and alter to support compilation for C++11 and to
1475         test std::chrono::__detail::ceil.
1476
1477 2020-10-02  Jonathan Wakely  <jwakely@redhat.com>
1478
1479         * testsuite/29_atomics/atomic_float/value_init.cc: Use float
1480         instead of double so that __atomic_load_8 isn't needed.
1481
1482 2020-10-02  Jonathan Wakely  <jwakely@redhat.com>
1483
1484         * testsuite/18_support/96817.cc: Use terminate handler that
1485         calls _Exit(0).
1486
1487 2020-10-02  Patrick Palka  <ppalka@redhat.com>
1488
1489         * include/bits/stl_iterator.h (reverse_iterator::iter_move):
1490         Define for C++20 as per P0896.
1491         (reverse_iterator::iter_swap): Likewise.
1492         (move_iterator::operator*): Apply P0896 changes for C++20.
1493         (move_iterator::operator[]): Likewise.
1494         * testsuite/24_iterators/reverse_iterator/cust.cc: New test.
1495
1496 2020-10-01  Jonathan Wakely  <jwakely@redhat.com>
1497
1498         * config/cpu/arm/cxxabi_tweaks.h (_GLIBCXX_GUARD_TEST_AND_ACQUIRE):
1499         Do not try to dereference return value of __atomic_load_n.
1500
1501 2020-09-30  Jonathan Wakely  <jwakely@redhat.com>
1502
1503         * config/cpu/arm/cxxabi_tweaks.h (_GLIBCXX_GUARD_TEST_AND_ACQUIRE):
1504         (_GLIBCXX_GUARD_SET_AND_RELEASE): Define for EABI.
1505
1506 2020-09-30  Jonathan Wakely  <jwakely@redhat.com>
1507
1508         * include/bits/c++config (_GLIBCXX_HAVE_BUILTIN_IS_SAME):
1509         Define for GCC 11 or when !__is_identifier(__is_same).
1510         (_GLIBCXX_BUILTIN_IS_SAME_AS): Remove.
1511         * include/std/type_traits (is_same, is_same_v): Replace uses
1512         of _GLIBCXX_BUILTIN_IS_SAME_AS.
1513
1514 2020-09-28  Patrick Palka  <ppalka@redhat.com>
1515
1516         * include/std/ranges (filter_view): Declare the data member
1517         _M_base last instead of first, and adjust constructors' member
1518         initializer lists accordingly.
1519         (transform_view): Likewise.
1520         (take_view): Likewise.
1521         (take_while_view): Likewise.
1522         (drop_view): Likewise.
1523         (drop_while_view): Likewise.
1524         (join_view): Likewise.
1525         (split_view): Likewise (and tweak nearby formatting).
1526         (reverse_view): Likewise.
1527         * testsuite/std/ranges/adaptors/sizeof.cc: Update expected
1528         sizes.
1529
1530 2020-09-28  Patrick Palka  <ppalka@redhat.com>
1531
1532         * testsuite/std/ranges/adaptors/sizeof.cc: New test.
1533
1534 2020-09-28  Patrick Palka  <ppalka@redhat.com>
1535
1536         * include/bits/ranges_util.h (subrange::_M_end): Give it
1537         [[no_unique_address]].
1538         * testsuite/std/ranges/subrange/sizeof.cc: New test.
1539
1540 2020-09-28  Patrick Palka  <ppalka@redhat.com>
1541
1542         * include/std/ranges (iota_view::_M_bound): Give it
1543         [[no_unique_address]].
1544         * testsuite/std/ranges/iota/iota_view.cc: Check that an
1545         unbounded iota_view has minimal size.
1546
1547 2020-09-27  Clement Chigot  <clement.chigot@atos.net>
1548
1549         * config/os/aix/t-aix: Use $(AR) without -X32_64.
1550
1551 2020-09-26  Jonathan Wakely  <jwakely@redhat.com>
1552
1553         PR libstdc++/96817
1554         * include/ext/atomicity.h (__gnu_cxx::__is_single_threaded()):
1555         New function wrapping __libc_single_threaded if available.
1556         (__exchange_and_add_dispatch, __atomic_add_dispatch): Use it.
1557         * libsupc++/guard.cc (__cxa_guard_acquire, __cxa_guard_abort)
1558         (__cxa_guard_release): Likewise.
1559         * testsuite/18_support/96817.cc: New test.
1560
1561 2020-09-25  Jonathan Wakely  <jwakely@redhat.com>
1562
1563         * libsupc++/Makefile.am: Remove redundant -std=gnu++1z flags.
1564         * libsupc++/Makefile.in: Regenerate.
1565
1566 2020-09-24  Antony Polukhin  <antoshkka@gmail.com>
1567
1568         PR libstdc++/71579
1569         * include/std/type_traits (invoke_result, is_invocable)
1570         (is_invocable_r, is_nothrow_invocable, is_nothrow_invocable_r):
1571         Add static_asserts to make sure that the arguments of the type
1572         traits are not misused with incomplete types.
1573         * testsuite/20_util/invoke_result/incomplete_args_neg.cc: New test.
1574         * testsuite/20_util/is_invocable/incomplete_args_neg.cc: New test.
1575         * testsuite/20_util/is_invocable/incomplete_neg.cc: New test.
1576         * testsuite/20_util/is_nothrow_invocable/incomplete_args_neg.cc:
1577         New test.
1578         * testsuite/20_util/is_nothrow_invocable/incomplete_neg.cc: Check
1579         for error on incomplete type usage in trait.
1580
1581 2020-09-24  Patrick Palka  <ppalka@redhat.com>
1582
1583         * include/std/ranges (__detail::__boxable): Split out the
1584         associated constraints of __box into here.
1585         (__detail::__box): Use the __boxable concept.  Define a leaner
1586         partial specialization for semiregular types.
1587         (single_view::_M_value): Give it [[no_unique_address]].
1588         (filter_view::_M_pred): Likewise.
1589         (transform_view::_M_fun): Likewise.
1590         (take_while_view::_M_pred): Likewise.
1591         (drop_while_view::_M_pred):: Likewise.
1592         * testsuite/std/ranges/adaptors/detail/semiregular_box.cc: New
1593         test.
1594
1595 2020-09-24  Jonathan Wakely  <jwakely@redhat.com>
1596
1597         * doc/xml/manual/configure.xml: Correct name of option.
1598         * doc/html/*: Regenerate.
1599
1600 2020-09-22  Jonathan Wakely  <jwakely@redhat.com>
1601
1602         PR libstdc++/97167
1603         * src/c++17/fs_path.cc (path::_Parser::root_path()): Check
1604         for empty string before inspecting the first character.
1605         * testsuite/27_io/filesystem/path/append/source.cc: Append
1606         empty string_view to path.
1607
1608 2020-09-22  Glen Joseph Fernandes  <glenjofe@gmail.com>
1609
1610         * include/bits/align.h (align): Fix overflow handling.
1611         * testsuite/20_util/align/3.cc: New test.
1612
1613 2020-09-22  Jonathan Wakely  <jwakely@redhat.com>
1614
1615         * include/Makefile.am: Add new headers and adjust for renamed
1616         header.
1617         * include/Makefile.in: Regenerate.
1618         * include/bits/iterator_concepts.h: Adjust for renamed header.
1619         * include/bits/range_access.h (ranges::*): Move to new
1620         <bits/ranges_base.h> header.
1621         * include/bits/ranges_algobase.h: Include new <bits/ranges_base.h>
1622         header instead of <ranges>.
1623         * include/bits/ranges_algo.h: Include new <bits/ranges_util.h>
1624         header.
1625         * include/bits/range_cmp.h: Moved to...
1626         * include/bits/ranges_cmp.h: ...here.
1627         * include/bits/ranges_base.h: New header.
1628         * include/bits/ranges_util.h: New header.
1629         * include/experimental/string_view: Include new
1630         <bits/ranges_base.h> header.
1631         * include/std/functional: Adjust for renamed header.
1632         * include/std/ranges (ranges::view_base, ranges::enable_view)
1633         (ranges::dangling, ranges::borrowed_iterator_t): Move to new
1634         <bits/ranges_base.h> header.
1635         (ranges::view_interface, ranges::subrange)
1636         (ranges::borrowed_subrange_t): Move to new <bits/ranges_util.h>
1637         header.
1638         * include/std/span: Include new <bits/ranges_base.h> header.
1639         * include/std/string_view: Likewise.
1640         * testsuite/24_iterators/back_insert_iterator/pr93884.cc: Add
1641         missing <ranges> header.
1642         * testsuite/24_iterators/front_insert_iterator/pr93884.cc:
1643         Likewise.
1644
1645 2020-09-22  Jonathan Wakely  <jwakely@redhat.com>
1646
1647         PR libstdc++/96803
1648         * include/std/tuple
1649         (_Tuple_impl(allocator_arg_t, Alloc, const _Tuple_impl<U...>&)):
1650         Use correct value category in __use_alloc call.
1651         * testsuite/20_util/tuple/cons/96803.cc: Check with constructors
1652         that require correct value category to be used.
1653
1654 2020-09-22  Patrick Palka  <ppalka@redhat.com>
1655
1656         * include/std/span (span::front): Remove static_assert.
1657         (span::back): Likewise.
1658         (span::operator[]): Likewise.
1659         * testsuite/23_containers/span/back_neg.cc: Rewrite to verify
1660         that we check the preconditions of back() only when it's called.
1661         * testsuite/23_containers/span/front_neg.cc: Likewise for
1662         front().
1663         * testsuite/23_containers/span/index_op_neg.cc: Likewise for
1664         operator[].
1665
1666 2020-09-22  Patrick Palka  <ppalka@redhat.com>
1667
1668         * include/bits/stl_algo.h (__sample): Exit early when the
1669         input range is empty.
1670         * testsuite/25_algorithms/sample/3.cc: New test.
1671
1672 2020-09-22  Patrick Palka  <ppalka@redhat.com>
1673
1674         * include/bits/stl_algo.h (for_each_n): Mark constexpr for C++20.
1675         (search): Likewise for the overload that takes a searcher.
1676         * testsuite/25_algorithms/for_each/constexpr.cc: Test constexpr
1677         std::for_each_n.
1678         * testsuite/25_algorithms/search/constexpr.cc: Test constexpr
1679         std::search overload that takes a searcher.
1680
1681 2020-09-21  Jonathan Wakely  <jwakely@redhat.com>
1682
1683         * include/bits/c++config (__replacement_assert): Add noreturn
1684         attribute.
1685         (__glibcxx_assert_impl): Use __builtin_expect to hint that the
1686         assertion is expected to pass.
1687
1688 2020-09-21  Jonathan Wakely  <jwakely@redhat.com>
1689
1690         * include/std/ranges (drop_view::begin()): Adjust constraints
1691         to match the correct condition for O(1) ranges::next (LWG 3482).
1692         * testsuite/std/ranges/adaptors/drop.cc: Check that iterator is
1693         cached for non-sized_range.
1694
1695 2020-09-21  Jonathan Wakely  <jwakely@redhat.com>
1696
1697         * include/std/ranges (transform_view, elements_view): Relax
1698         constraints on operator- for iterators, as per LWG 3483.
1699         * testsuite/std/ranges/adaptors/elements.cc: Check that we
1700         can take the difference of two iterators from a non-random
1701         access range.
1702         * testsuite/std/ranges/adaptors/transform.cc: Likewise.
1703
1704 2020-09-21  Jonathan Wakely  <jwakely@redhat.com>
1705
1706         PR libstdc++/97132
1707         * include/bits/align.h (align) [!_GLIBCXX_USE_C99_STDINT_TR1]:
1708         Remove unused code.
1709         (assume_aligned): Do not use __builtin_assume_aligned during
1710         constant evaluation.
1711         * testsuite/20_util/assume_aligned/1.cc: Improve test.
1712         * testsuite/20_util/assume_aligned/97132.cc: New test.
1713
1714 2020-09-20  Jonathan Wakely  <jwakely@redhat.com>
1715
1716         PR libstdc++/97101
1717         * include/std/functional (bind_front): Fix order of parameters
1718         in is_nothrow_constructible_v specialization.
1719         * testsuite/20_util/function_objects/bind_front/97101.cc: New test.
1720
1721 2020-09-11  Thomas Rodgers  <trodgers@redhat.com>
1722
1723         * include/std/memory: Move #include <bits/align.h> inside C++11
1724         conditional includes.
1725
1726 2020-09-11  Thomas Rodgers  <trodgers@redhat.com>
1727
1728         * include/Makefile.am (bits_headers): Add new header.
1729         * include/Makefile.in: Regenerate.
1730         * include/bits/align.h: New file.
1731         * include/std/memory (align): Move definition to bits/align.h.
1732         (assume_aligned): Likewise.
1733
1734 2020-09-11  Jonathan Wakely  <jwakely@redhat.com>
1735
1736         * include/std/chrono [C++17] (chrono::__detail::ceil): Add
1737         using declaration to make chrono::ceil available for internal
1738         use with a consistent name.
1739         (chrono::__detail::__ceil_impl): New function template.
1740         (chrono::__detail::ceil): Use __ceil_impl to compare and
1741         increment the value. Remove SFINAE constraint.
1742
1743 2020-09-11  Jonathan Wakely  <jwakely@redhat.com>
1744
1745         * include/bits/regex_error.h (__throw_regex_error): Fix
1746         parameter declaration and use reserved attribute names.
1747
1748 2020-09-11  Mike Crowe  <mac@mcrowe.com>
1749
1750         * include/std/condition_variable (condition_variable::wait_until):
1751         Convert delta to steady_clock duration before adding to current
1752         steady_clock time to avoid rounding errors described in PR68519.
1753         (condition_variable::wait_for): Simplify calculation of absolute
1754         time by using chrono::__detail::ceil in both overloads.
1755         * testsuite/30_threads/condition_variable/members/68519.cc:
1756         (test_wait_for): Renamed from test01. Replace unassigned val
1757         variable with constant false. Reduce scope of mx and cv
1758         variables to just test_wait_for function.
1759         (test_wait_until): Add new test case.
1760
1761 2020-09-11  Mike Crowe  <mac@mcrowe.com>
1762
1763         PR libstdc++/91486
1764         * include/bits/atomic_futex.h
1765         (__atomic_futex_unsigned::_M_load_when_equal_for)
1766         (__atomic_futex_unsigned::_M_load_when_equal_until): Use
1767         __detail::ceil to convert delta to the reference clock
1768         duration type to avoid resolution problems.
1769         * include/std/chrono (__detail::ceil): Move implementation
1770         of std::chrono::ceil into private namespace so that it's
1771         available to pre-C++17 code.
1772         * testsuite/30_threads/async/async.cc (test_pr91486):
1773         Test __atomic_futex_unsigned::_M_load_when_equal_for.
1774
1775 2020-09-11  Mike Crowe  <mac@mcrowe.com>
1776
1777         * include/bits/atomic_futex.h
1778         (__atomic_futex_unsigned::_M_load_when_equal_until): Add
1779         loop on generic _Clock to check the timeout against _Clock
1780         again after _M_load_when_equal_until returns indicating a
1781         timeout.
1782         * testsuite/30_threads/async/async.cc: Invent slow_clock
1783         that runs at an eleventh of steady_clock's speed. Use it
1784         to test the user-supplied-clock variant of
1785         __atomic_futex_unsigned::_M_load_when_equal_until works
1786         generally with test03 and loops correctly when the timeout
1787         time hasn't been reached in test04.
1788
1789 2020-09-11  Mike Crowe  <mac@mcrowe.com>
1790
1791         PR libstdc++/93542
1792         * include/bits/atomic_futex.h (__atomic_futex_unsigned): Change
1793         __clock_t typedef to use steady_clock so that unknown clocks are
1794         synced to it rather than system_clock. Change existing __clock_t
1795         overloads of _M_load_and_text_until_impl and
1796         _M_load_when_equal_until to use system_clock explicitly. Remove
1797         comment about DR 887 since these changes address that problem as
1798         best as we currently able.
1799
1800 2020-09-11  Mike Crowe  <mac@mcrowe.com>
1801
1802         PR libstdc++/93542
1803         * config/abi/pre/gnu.ver: Update for addition of
1804         __atomic_futex_unsigned_base::_M_futex_wait_until_steady.
1805         * include/bits/atomic_futex.h (__atomic_futex_unsigned_base):
1806         Add comments to clarify that _M_futex_wait_until and
1807         _M_load_and_test_until use CLOCK_REALTIME.
1808         (__atomic_futex_unsigned_base::_M_futex_wait_until_steady)
1809         (__atomic_futex_unsigned_base::_M_load_and_text_until_steady):
1810         New member functions that use CLOCK_MONOTONIC.
1811         (__atomic_futex_unsigned_base::_M_load_and_test_until_impl)
1812         (__atomic_futex_unsigned_base::_M_load_when_equal_until): Add
1813         overloads that accept a steady_clock time_point and use the
1814         new member functions.
1815         * src/c++11/futex.cc: Include headers required for
1816         clock_gettime.
1817         (futex_clock_monotonic_flag): New constant to tell futex to
1818         use CLOCK_MONOTONIC to match existing futex_clock_realtime_flag.
1819         (futex_clock_monotonic_unavailable): New global to store the
1820         result of trying to use CLOCK_MONOTONIC.
1821         (__atomic_futex_unsigned_base::_M_futex_wait_until_steady): Add
1822         new variant of _M_futex_wait_until that uses CLOCK_MONOTONIC to
1823         support waiting using steady_clock.
1824
1825 2020-09-11  Mike Crowe  <mac@mcrowe.com>
1826
1827         * src/c++11/futex.cc: Add new constants for required futex
1828         flags.  Add futex_clock_realtime_unavailable flag to store
1829         result of trying to use FUTEX_CLOCK_REALTIME.
1830         (__atomic_futex_unsigned_base::_M_futex_wait_until): Try to
1831         use FUTEX_WAIT_BITSET with FUTEX_CLOCK_REALTIME and only
1832         fall back to using gettimeofday and FUTEX_WAIT if that's not
1833         supported.
1834
1835 2020-09-11  Mike Crowe  <mac@mcrowe.com>
1836
1837         * testsuite/30_threads/async/async.cc (test02): Test steady_clock
1838         with std::future::wait_until.
1839         (test03): Add new test templated on clock type waiting for future
1840         associated with async to resolve.
1841         (main): Call test03 to test both system_clock and steady_clock.
1842
1843 2020-09-11  Torbjörn SVENSSON  <torbjorn.svensson@st.com>
1844             Christophe Lyon  <christophe.lyon@linaro.org>
1845
1846         * libsupc++/eh_call.cc: Avoid warning with -fno-exceptions.
1847
1848 2020-09-11  Torbjörn SVENSSON  <torbjorn.svensson@st.com>
1849             Christophe Lyon  <christophe.lyon@linaro.org>
1850
1851         * libsupc++/eh_call.cc: Avoid warning with -fno-exceptions.
1852
1853 2020-09-11  Christophe Lyon  <christophe.lyon@linaro.org>
1854
1855         * include/bits/regex_error.h: Avoid warning with -fno-exceptions.
1856
1857 2020-09-10  Jonathan Wakely  <jwakely@redhat.com>
1858
1859         * include/bits/locale_conv.h (__do_str_codecvt, __str_codecvt_in_all):
1860         Add casts to compare types of the same signedness.
1861
1862 2020-09-10  Jonathan Wakely  <jwakely@redhat.com>
1863
1864         * include/bits/ranges_algobase.h (__equal_fn): Remove unused
1865         typedef.
1866
1867 2020-09-10  Jonathan Wakely  <jwakely@redhat.com>
1868
1869         * include/std/version (__cpp_lib_array_constexpr):
1870         (__cpp_lib_constexpr_char_traits): Only define C++17 value when
1871         compiling C++17.
1872
1873 2020-09-10  Jonathan Wakely  <jwakely@redhat.com>
1874
1875         * include/experimental/bits/shared_ptr.h (shared_ptr(auto_ptr&&))
1876         (operator=(auto_ptr&&)): Add diagnostic pragmas to suppress
1877         warnings for uses of std::auto_ptr.
1878         * include/experimental/type_traits (is_literal_type_v):
1879         Likewise, for use of std::is_literal_type.
1880         * include/std/condition_variable (condition_variable_any::_Unlock):
1881         Likewise, for use of std::uncaught_exception.
1882
1883 2020-09-10  Jonathan Wakely  <jwakely@redhat.com>
1884
1885         * include/bits/fs_path.h (path::_List::type()): Avoid narrowing
1886         conversion.
1887         * include/std/chrono (operator+(const year&, const years&)):
1888         Likewise.
1889
1890 2020-09-10  Jonathan Wakely  <jwakely@redhat.com>
1891
1892         * include/bits/codecvt.h (codecvt_byname): Remove names of
1893         unused parameters.
1894
1895 2020-09-10  Jonathan Wakely  <jwakely@redhat.com>
1896
1897         * include/bits/locale_facets_nonio.tcc: Adjust whitespace.
1898
1899 2020-09-10  Krystian Kuźniarek  <krystian.kuzniarek@gmail.com>
1900
1901         * include/c_global/cmath (__lerp): Avoid -Wparentheses warnings.
1902
1903 2020-09-10  Krystian Kuźniarek  <krystian.kuzniarek@gmail.com>
1904
1905         * include/bits/atomic_base.h: Fix -Wunused-variable
1906         warnings.
1907         * include/ext/new_allocator.h: Fix -Wunused-parameter
1908         warnings.
1909
1910 2020-09-10  Jonathan Wakely  <jwakely@redhat.com>
1911
1912         * include/bits/stl_iterator.h (counted_iterator): Add assertions
1913         to check preconditions added by LWG 3472.
1914
1915 2020-09-10  Jonathan Wakely  <jwakely@redhat.com>
1916
1917         PR libstdc++/94160
1918         * src/c++17/memory_resource.cc (munge_options): Round
1919         max_blocks_per_chunk to a multiple of four.
1920         (__pool_resource::_M_alloc_pools()): Simplify slightly.
1921         * testsuite/20_util/unsynchronized_pool_resource/allocate.cc:
1922         Check that valid pointers are returned when small values are
1923         used for max_blocks_per_chunk.
1924
1925 2020-09-10  Jonathan Wakely  <jwakely@redhat.com>
1926
1927         PR libstdc++/96942
1928         * include/std/memory_resource (monotonic_buffer_resource::do_allocate):
1929         Use __builtin_expect when checking if a new buffer needs to be
1930         allocated from the upstream resource, and for checks for edge
1931         cases like zero sized buffers and allocations.
1932         * src/c++17/memory_resource.cc (aligned_size): New class template.
1933         (aligned_ceil): New helper function to round up to a given
1934         alignment.
1935         (monotonic_buffer_resource::chunk): Replace _M_size and _M_align
1936         with an aligned_size member. Remove _M_canary member. Change _M_next
1937         to pointer instead of unaligned buffer.
1938         (monotonic_buffer_resource::chunk::allocate): Round up to multiple
1939         of 64 instead of to power of two. Check for size overflow. Remove
1940         redundant check for minimum required alignment.
1941         (monotonic_buffer_resource::chunk::release): Adjust for changes
1942         to data members.
1943         (monotonic_buffer_resource::_M_new_buffer): Use aligned_ceil.
1944         (big_block): Replace _M_size and _M_align with aligned_size
1945         member.
1946         (big_block::big_block): Check for size overflow.
1947         (big_block::size, big_block::align): Adjust to use aligned_size.
1948         (big_block::alloc_size): Use aligned_ceil.
1949         (munge_options): Use aligned_ceil.
1950         (__pool_resource::allocate): Use big_block::align for alignment.
1951         * testsuite/20_util/monotonic_buffer_resource/allocate.cc: Check
1952         upstream resource gets expected values for impossible sizes.
1953         * testsuite/20_util/unsynchronized_pool_resource/allocate.cc:
1954         Likewise. Adjust checks for expected alignment in existing test.
1955
1956 2020-09-07  Jonathan Wakely  <jwakely@redhat.com>
1957
1958         * include/std/chrono (duration::_S_gcd): Use invariant that
1959         neither value is zero initially.
1960
1961 2020-09-07  Jonathan Wakely  <jwakely@redhat.com>
1962
1963         * include/std/ranges (__box): Simplify constraints as per LWG 3477.
1964
1965 2020-09-03  Jonathan Wakely  <jwakely@redhat.com>
1966
1967         PR libstdc++/96592
1968         * include/std/tuple (_TupleConstraints<true, T...>): Use
1969         alternative is_constructible instead of std::is_constructible.
1970         * testsuite/20_util/tuple/cons/96592.cc: New test.
1971
1972 2020-09-03  Jonathan Wakely  <jwakely@redhat.com>
1973
1974         * include/std/chrono (duration::_S_gcd): Use iterative algorithm
1975         for C++14 and later.
1976         * include/std/numeric (__detail::__gcd): Replace recursive
1977         Euclidean algorithm with iterative version of binary GCD algorithm.
1978         * testsuite/26_numerics/gcd/1.cc: Test additional inputs.
1979         * testsuite/26_numerics/gcd/gcd_neg.cc: Adjust dg-error lines.
1980         * testsuite/26_numerics/lcm/lcm_neg.cc: Likewise.
1981         * testsuite/experimental/numeric/gcd.cc: Test additional inputs.
1982         * testsuite/26_numerics/gcd/2.cc: New test.
1983
1984 2020-09-02  Jonathan Wakely  <jwakely@redhat.com>
1985
1986         PR libstdc++/92978
1987         * testsuite/experimental/numeric/92978.cc: Use experimental::lcm
1988         not std::lcm.
1989
1990 2020-09-02  Jonathan Wakely  <jwakely@redhat.com>
1991
1992         PR libstdc++/96851
1993         * include/bits/cpp_type_traits.h (__is_memcmp_ordered):
1994         New trait that says if memcmp can be used for ordering.
1995         (__is_memcmp_ordered_with): Likewise, for two types.
1996         * include/bits/deque.tcc (__lex_cmp_dit): Use new traits
1997         instead of __is_byte and __numeric_traits.
1998         (__lexicographical_compare_aux1): Likewise.
1999         * include/bits/ranges_algo.h (__lexicographical_compare_fn):
2000         Likewise.
2001         * include/bits/stl_algobase.h (__lexicographical_compare_aux1)
2002         (__is_byte_iter): Likewise.
2003         * include/std/array (operator<=>): Likewise. Only use memcmp
2004         when std::is_constant_evaluated() is false.
2005         * testsuite/23_containers/array/comparison_operators/96851.cc:
2006         New test.
2007         * testsuite/23_containers/array/tuple_interface/get_neg.cc:
2008         Adjust dg-error line numbers.
2009
2010 2020-09-02  Jonathan Wakely  <jwakely@redhat.com>
2011
2012         * include/bits/stl_iterator.h: Include <bits/exception_defines.h>
2013         for definitions of __try, __catch and __throw_exception_again.
2014         (counted_iterator::operator++(int)): Use __throw_exception_again
2015         instead of throw.
2016         * libsupc++/new: Include <bits/exception.h> not <exception>.
2017         * libsupc++/new_opvnt.cc: Include <bits/exception_defines.h>.
2018         * testsuite/18_support/destroying_delete.cc: Include
2019         <type_traits> for std::is_same_v definition.
2020         * testsuite/20_util/variant/index_type.cc: Qualify size_t.
2021
2022 2020-09-01  Jonathan Wakely  <jwakely@redhat.com>
2023
2024         PR libstdc++/71960
2025         * include/bits/c++config (__glibcxx_assert_impl): Remove
2026         do-while so that uses of the macro need to add it.
2027         (__glibcxx_assert): Rename macro for runtime assertions
2028         to __glibcxx_assert_2.
2029         (__glibcxx_assert_1): Define macro for constexpr assertions.
2030         (__glibcxx_assert): Define macro for constexpr and runtime
2031         assertions.
2032         * include/bits/range_access.h (ranges::advance): Remove
2033         redundant precondition checks during constant evaluation.
2034         * include/parallel/base.h (_GLIBCXX_PARALLEL_ASSERT): Always
2035         use do-while in macro expansion.
2036         * include/std/ranges (iota_view::iota_view(W, B)): Remove
2037         redundant braces.
2038
2039 2020-09-01  Jonathan Wakely  <jwakely@redhat.com>
2040
2041         * include/std/chrono (duration::_S_gcd(intmax_t, intmax_t)):
2042         New helper function for finding GCD of two positive intmax_t
2043         values.
2044         (duration::__divide): New helper alias for dividing one period
2045         by another.
2046         (duration::__is_harmonic): Use __divide not ratio_divide.
2047         (duration(const duration<R2, P2>&)): Require the duration rep
2048         types to be convertible.
2049         * testsuite/20_util/duration/cons/dr2094.cc: New test.
2050         * testsuite/20_util/duration/requirements/reduced_period.cc:
2051         Fix definition of unused member functions in test type.
2052         * testsuite/20_util/duration/requirements/typedefs_neg2.cc:
2053         Adjust expected errors.
2054
2055 2020-08-29  Jonathan Wakely  <jwakely@redhat.com>
2056
2057         * include/std/numeric (__detail::__absu(bool)): Make deleted
2058         function a function template, so it will be chosen for calls
2059         with an explicit template argument list.
2060         * testsuite/26_numerics/gcd/gcd_neg.cc: Add dg-prune-output.
2061         * testsuite/26_numerics/lcm/lcm_neg.cc: Likewise.
2062
2063 2020-08-28  Jonathan Wakely  <jwakely@redhat.com>
2064
2065         * include/std/chrono (common_type): Fix partial specializations
2066         for a single duration type to use the common_type of the rep.
2067         (duration::operator+, duration::operator-): Fix return types
2068         to also use the common_type of the rep.
2069         * testsuite/20_util/duration/requirements/reduced_period.cc:
2070         Check duration using a rep that has common_type specialized.
2071
2072 2020-08-28  Jonathan Wakely  <jwakely@redhat.com>
2073
2074         PR libstdc++/92978
2075         * include/std/numeric (__abs_integral): Replace with ...
2076         (__detail::__absu): New function template that returns an
2077         unsigned type, guaranteeing it can represent the most
2078         negative signed value.
2079         (__detail::__gcd, __detail::__lcm): Require arguments to
2080         be unsigned and therefore already non-negative.
2081         (gcd, lcm): Convert arguments to absolute value as unsigned
2082         type before calling __detail::__gcd or __detail::__lcm.
2083         * include/experimental/numeric (gcd, lcm): Likewise.
2084         * testsuite/26_numerics/gcd/gcd_neg.cc: Adjust expected
2085         errors.
2086         * testsuite/26_numerics/lcm/lcm_neg.cc: Likewise.
2087         * testsuite/26_numerics/gcd/92978.cc: New test.
2088         * testsuite/26_numerics/lcm/92978.cc: New test.
2089         * testsuite/experimental/numeric/92978.cc: New test.
2090
2091 2020-08-27  Jonathan Wakely  <jwakely@redhat.com>
2092
2093         * include/std/chrono (__duration_common_type): Ensure the
2094         reduced ratio is used. Remove unused partial specialization
2095         using __failure_type.
2096         (common_type): Pass reduced ratios to __duration_common_type.
2097         Add partial specializations for simple cases involving a single
2098         duration or time_point type.
2099         (duration::period): Use reduced ratio.
2100         (duration::operator+(), duration::operator-()): Return duration
2101         type using the reduced ratio.
2102         * testsuite/20_util/duration/requirements/typedefs_neg2.cc:
2103         Adjust expected errors.
2104         * testsuite/20_util/duration/requirements/reduced_period.cc: New test.
2105
2106 2020-08-27  Patrick Palka  <ppalka@redhat.com>
2107
2108         * include/std/chrono (year_month::operator+): Properly handle a
2109         month value of 0 by casting the month value to int before
2110         subtracting 1 from it so that the difference is sign-extended in
2111         the subsequent addition.
2112         * testsuite/std/time/year_month/1.cc: Test adding months to a
2113         year_month whose month component is below or above the
2114         normalized range of [1,12].
2115
2116 2020-08-27  Patrick Palka  <ppalka@redhat.com>
2117
2118         * include/std/chrono
2119         (__detail::__months_years_conversion_disambiguator): Define.
2120         (year_month::operator+=): Templatize the 'months'-based overload
2121         so that the 'years'-based overload is selected in case of
2122         equally-ranked implicit conversion sequences to both 'months'
2123         and 'years' from the supplied argument.
2124         (year_month::operator-=): Likewise.
2125         (year_month::operator+): Likewise.
2126         (year_month::operator-): Likewise.
2127         (year_month_day::operator+=): Likewise.
2128         (year_month_day::operator-=): Likewise.
2129         (year_month_day::operator+): Likewise.
2130         (year_month_day::operator-): Likewise.
2131         (year_month_day_last::operator+=): Likewise.
2132         (year_month_day_last::operator-=): Likewise.
2133         (year_month_day_last::operator+): Likewise
2134         (year_month_day_last::operator-): Likewise.
2135         (year_month_day_weekday::operator+=): Likewise
2136         (year_month_day_weekday::operator-=): Likewise.
2137         (year_month_day_weekday::operator+): Likewise.
2138         (year_month_day_weekday::operator-): Likewise.
2139         (year_month_day_weekday_last::operator+=): Likewise
2140         (year_month_day_weekday_last::operator-=): Likewise.
2141         (year_month_day_weekday_last::operator+): Likewise.
2142         (year_month_day_weekday_last::operator-): Likewise.
2143         (testsuite/std/time/year_month/2.cc): New test.
2144         (testsuite/std/time/year_month_day/2.cc): New test.
2145         (testsuite/std/time/year_month_day_last/2.cc): New test.
2146         (testsuite/std/time/year_month_weekday/2.cc): New test.
2147         (testsuite/std/time/year_month_weekday_last/2.cc): New test.
2148         * testsuite/std/time/year_month/2.cc: New file.
2149         * testsuite/std/time/year_month_day/2.cc: New file.
2150         * testsuite/std/time/year_month_day_last/2.cc: New file.
2151         * testsuite/std/time/year_month_weekday/2.cc: New file.
2152         * testsuite/std/time/year_month_weekday_last/2.cc: New file.
2153
2154 2020-08-27  Patrick Palka  <ppalka@redhat.com>
2155
2156         PR libstdc++/95322
2157         * include/std/ranges (transform_view::sentinel::__distance_from):
2158         Give this a deduced return type.
2159         (transform_view::sentinel::operator-): Adjust the return type so
2160         that it's based on the constness of the iterator rather than
2161         that of the sentinel.
2162         * testsuite/std/ranges/adaptors/95322.cc: Refer to LWG 3488.
2163
2164 2020-08-27  Patrick Palka  <ppalka@redhat.com>
2165
2166         * include/std/ranges (elements_view::begin): Adjust constraints.
2167         (elements_view::end): Likewise.
2168         (elements_view::_Sentinel::operator==): Templatize to take both
2169         _Iterator<true> and _Iterator<false>.
2170         (elements_view::_Sentinel::operator-): Likewise.
2171         * testsuite/std/ranges/adaptors/elements.cc: Add testcase for
2172         the example from P1994R1.
2173         * testsuite/std/ranges/adaptors/lwg3406.cc: New test.
2174
2175 2020-08-27  Patrick Palka  <ppalka@redhat.com>
2176
2177         * include/std/ranges (elements_view::end): Replace these two
2178         overloads with four new overloads.
2179         (elements_view::_Iterator::operator==): Remove.
2180         (elements_view::_Iterator::operator-): Likewise.
2181         (elements_view::_Sentinel): Define.
2182
2183 2020-08-26  Jonathan Wakely  <jwakely@redhat.com>
2184
2185         * include/std/tuple (_Tuple_impl): Whitespaces changes for
2186         consistent indentation. Also use __enable_if_t alias template.
2187
2188 2020-08-26  Jonathan Wakely  <jwakely@redhat.com>
2189
2190         PR libstdc++/96803
2191         * include/std/tuple
2192         (_Tuple_impl(allocator_arg_t, Alloc, const _Tuple_impl<U...>&)):
2193         Replace parameter pack with a type parameter and a pack and pass
2194         the first type to __use_alloc.
2195         * testsuite/20_util/tuple/cons/96803.cc: New test.
2196
2197 2020-08-26  Patrick Palka  <ppalka@redhat.com>
2198
2199         * include/std/chrono (year_month_weekday::operator==): Compare
2200         weekday_indexed instead of weekday.
2201         * testsuite/std/time/year_month_weekday/1.cc: Augment testcase.
2202
2203 2020-08-26  Jonathan Wakely  <jwakely@redhat.com>
2204
2205         * include/bits/hashtable_policy.h (_Hash_code_base): Change
2206         index of _Hashtable_ebo_helper base class.
2207         * testsuite/23_containers/unordered_map/dup_types.cc: New test.
2208
2209 2020-08-26  Jonathan Wakely  <jwakely@redhat.com>
2210
2211         PR libstdc++/71960
2212         * include/experimental/string_view (basic_string_view):
2213         Enable debug assertions.
2214         * include/std/string_view (basic_string_view):
2215         Likewise.
2216
2217 2020-08-26  François Dumont  <fdumont@gcc.gnu.org>
2218
2219         * include/bits/hashtable_policy.h (_Hashtable<>): Rename _H1 into _Hash
2220         _H2 into _RangeHash and _Hash into _Unused.
2221         (_Hastable_base<>): Likewise.
2222         (_Map_base<>): Likewise.
2223         (_Insert_base<>): Likewise.
2224         (_Insert<>): Likewise.
2225         (_Rehash_base<>): Likewise.
2226         (_Local_iterator_base<>): Likewise.
2227         (_Hash_code_base<>): Likewise.
2228         (_Hash_code_base<_Key, _Value, _ExtractKey, _H1, _H2, _Hash, false>):
2229         Remove.
2230         (_Hash_code_base<_Key, _Value, _ExtractKey, _H1, _H2, _Hash, true>):
2231         Remove.
2232         (_Hash_code_base<_Key, _Value, _ExtractKey, _Hash, _RangeHas, _Unused,
2233         bool>): Remove _Hashtable_ebo_helper<2, _RangeHash> base type..
2234         (_Hash_code_base<>::_M_bucket_index(const _Key&, __hash_code, size_t)):
2235         Replace by...
2236         (_Hash_code_base<>::_M_bucket_index(__hash_code, size_t)): ...this.
2237         (_Local_iterator<>): Remove _H1 and _H2 template parameters.
2238         (_Local_const_iterator<>): Likewise.
2239         (_Equality<>): Likewise.
2240         (_Map_base<>::operator[](const key_type&): Adapt.
2241         (_Map_base<>::operator[](key_type&&): Adapt.
2242         (_Identity::operator()): Add noexcept.
2243         (_Select1st::operator()): Likewise.
2244         (_Hash_code_base<>): Remove _Hashtable_ebo_helper<0, _ExtractKey> base
2245         type.
2246         (_Hash_code_base::_M_extract): Remove.
2247         * include/bits/hashtable.h (_Hashtable<>): Remove _H1 and _H2 template
2248         parameters. Remove _ExtractKey from constructors.
2249         (_Hashtable<>::_M_insert_unique_node(const key_type&, size_t,
2250         __hash_code, __node_type*, size_t)): Replace by...
2251         (_Hashtable<>::_M_insert_unique_node(size_t, __hash_code,
2252          __node_type*, size_t)): ...this.
2253         (_Hashtable<>::_M_insert_muti_node(__node_type*, const key_type&,
2254         __hash_code, __node_type*)): Replace by...
2255         (_Hashtable<>::_M_insert_multi_node(__node_type*, __hash_code,
2256         __node_type*)): ...this.
2257         (_Hashtable<>::__key_extract): Remove.
2258         * include/bits/node_handle.h: Adapt.
2259
2260 2020-08-25  Jonathan Wakely  <jwakely@redhat.com>
2261
2262         * testsuite/21_strings/debug/iterator_self_move_assign_neg.cc: Removed.
2263         * testsuite/21_strings/debug/self_move_assign_neg.cc: Removed.
2264         * testsuite/23_containers/deque/debug/iterator_self_move_assign_neg.cc: Removed.
2265         * testsuite/23_containers/deque/debug/self_move_assign_neg.cc: Removed.
2266         * testsuite/23_containers/forward_list/debug/iterator_self_move_assign_neg.cc: Removed.
2267         * testsuite/23_containers/forward_list/debug/self_move_assign_neg.cc: Removed.
2268         * testsuite/23_containers/list/debug/iterator_self_move_assign_neg.cc: Removed.
2269         * testsuite/23_containers/list/debug/self_move_assign_neg.cc: Removed.
2270         * testsuite/23_containers/map/debug/iterator_self_move_assign_neg.cc: Removed.
2271         * testsuite/23_containers/map/debug/self_move_assign_neg.cc: Removed.
2272         * testsuite/23_containers/multimap/debug/iterator_self_move_assign_neg.cc: Removed.
2273         * testsuite/23_containers/multimap/debug/self_move_assign_neg.cc: Removed.
2274         * testsuite/23_containers/multiset/debug/iterator_self_move_assign_neg.cc: Removed.
2275         * testsuite/23_containers/multiset/debug/self_move_assign_neg.cc: Removed.
2276         * testsuite/23_containers/set/debug/iterator_self_move_assign_neg.cc: Removed.
2277         * testsuite/23_containers/set/debug/self_move_assign_neg.cc: Removed.
2278         * testsuite/23_containers/unordered_map/debug/iterator_self_move_assign_neg.cc: Removed.
2279         * testsuite/23_containers/unordered_map/debug/self_move_assign_neg.cc: Removed.
2280         * testsuite/23_containers/unordered_multimap/debug/iterator_self_move_assign_neg.cc:
2281         Removed.
2282         * testsuite/23_containers/unordered_multimap/debug/self_move_assign_neg.cc: Removed.
2283         * testsuite/23_containers/unordered_multiset/debug/iterator_self_move_assign_neg.cc:
2284         Removed.
2285         * testsuite/23_containers/unordered_multiset/debug/self_move_assign_neg.cc: Removed.
2286         * testsuite/23_containers/unordered_set/debug/iterator_self_move_assign_neg.cc: Removed.
2287         * testsuite/23_containers/unordered_set/debug/self_move_assign_neg.cc: Removed.
2288         * testsuite/23_containers/vector/debug/iterator_self_move_assign_neg.cc: Removed.
2289         * testsuite/23_containers/vector/debug/self_move_assign_neg.cc: Removed.
2290
2291 2020-08-25  Patrick Palka  <ppalka@redhat.com>
2292
2293         * include/std/chrono (year_month_weekday::ok): Fix assert.
2294
2295 2020-08-25  Jonathan Wakely  <jwakely@redhat.com>
2296
2297         * include/std/future (future, shared_future. promise): Add
2298         is_destructible assertion (LWG 3466). Adjust string-literal for
2299         !is_array and !is_function assertions.
2300         * testsuite/30_threads/future/requirements/lwg3458.cc: Check
2301         types with no accessible destructor. Adjust expected errors.
2302         * testsuite/30_threads/promise/requirements/lwg3466.cc:
2303         Likewise.
2304         * testsuite/30_threads/shared_future/requirements/lwg3458.cc:
2305         Likewise.
2306
2307 2020-08-25  Patrick Palka  <ppalka@redhat.com>
2308             Ed Smith-Rowland  <3dw4rd@verizon.net>
2309             Jonathan Wakely  <jwakely@redhat.com>
2310
2311         * include/std/chrono (time_point::operator++)
2312         (time_point::operator--): Define.
2313         (utc_clock, tai_clock, gps_clock): Forward declare.
2314         (utc_time, utc_seconds, tai_time, tai_seconds, gps_time)
2315         (gps_seconds): Define.
2316         (is_clock<utc_clock>, is_clock<tai_clock>, is_clock<gps_clock>)
2317         (is_clock_v<utc_clock>, is_clock_v<tai_clock>)
2318         (is_clock_v<gps_clock>): Define these specializations.
2319         (leap_second_info): Define.
2320         (day, month, year, weekday, weekday_indexed)
2321         (weekday_last, month_day, month_day_last, month_weekday)
2322         (month_weekday_last, year_month, year_month_day)
2323         (year_month_day_last, year_month_weekday, year_month_weekday_last):
2324         Declare and later define.
2325         (last_spec, last, __detail::__days_per_month)
2326         (__detail::__days_per_month, __detail::__last_day): Define.
2327         (January, February, March, April, May, June, July, August)
2328         (September, October, November, December, Sunday, Monday, Tuesday)
2329         (Wednesday, Thursday, Friday, Saturday): Define.
2330         (weekday::operator[]): Define out-of-line.
2331         (year_month_day::_S_from_days, year_month_day::M_days_since_epoch):
2332         Likewise.
2333         (year_month_day::year_month_day, year_month_day::ok): Likewise.
2334         (__detail::__pow10, hh_mm_ss): Define.
2335         (literals::chrono_literals::operator""d)
2336         (literals::chrono_literals::operator""y): Define.
2337         (is_am, is_pm, make12, make24): Define.
2338         * testsuite/20_util/time_point/4.cc: New test.
2339         * testsuite/std/time/day/1.cc: New test.
2340         * testsuite/std/time/hh_mm_ss/1.cc: New test.
2341         * testsuite/std/time/is_am/1.cc: New test.
2342         * testsuite/std/time/is_pm/1.cc: New test.
2343         * testsuite/std/time/make12/1.cc: New test.
2344         * testsuite/std/time/make24/1.cc: New test.
2345         * testsuite/std/time/month/1.cc: New test.
2346         * testsuite/std/time/month_day/1.cc: New test.
2347         * testsuite/std/time/month_day_last/1.cc: New test.
2348         * testsuite/std/time/month_weekday/1.cc: New test.
2349         * testsuite/std/time/month_weekday_last/1.cc: New test.
2350         * testsuite/std/time/weekday/1.cc: New test.
2351         * testsuite/std/time/weekday_indexed/1.cc: New test.
2352         * testsuite/std/time/weekday_last/1.cc: New test.
2353         * testsuite/std/time/year/1.cc: New test.
2354         * testsuite/std/time/year_month/1.cc: New test.
2355         * testsuite/std/time/year_month_day/1.cc: New test.
2356         * testsuite/std/time/year_month_day_last/1.cc: New test.
2357         * testsuite/std/time/year_month_weekday/1.cc: New test.
2358         * testsuite/std/time/year_month_weekday_last/1.cc: New test.
2359
2360 2020-08-24  Jonathan Wakely  <jwakely@redhat.com>
2361
2362         * include/std/ranges (join_view): Add deduction guide (LWG 3474).
2363         * testsuite/std/ranges/adaptors/join_lwg3474.cc: New test.
2364
2365 2020-08-24  Jonathan Wakely  <jwakely@redhat.com>
2366
2367         * include/bits/iterator_concepts.h (indirectly_readable): Add
2368         partial specializations to resolve ambiguities (LWG 3446).
2369         * testsuite/24_iterators/associated_types/readable.traits.cc:
2370         Check types with both value_type and element_type.
2371
2372 2020-08-24  Jonathan Wakely  <jwakely@redhat.com>
2373
2374         * include/std/ranges (ranges::iota_view::size()): Perform all
2375         calculations in the right unsigned types.
2376         * testsuite/std/ranges/iota/size.cc: New test.
2377
2378 2020-08-24  Jonathan Wakely  <jwakely@redhat.com>
2379
2380         PR libstdc++/96766
2381         * include/std/variant (_Variant_storage): Replace implicit
2382         conversions from size_t to __index_type with explicit casts.
2383
2384 2020-08-24  Jonathan Wakely  <jwakely@redhat.com>
2385
2386         * testsuite/30_threads/packaged_task/cons/alloc.cc: Run for
2387         C++11 and skip for C++17 or later.
2388
2389 2020-08-24  Corentin Gay  <gay@adacore.com>
2390
2391         * testsuite/20_util/shared_ptr/atomic/3.cc: Do not require POSIX
2392         threads and add -pthread only on targets supporting them.
2393         * testsuite/20_util/shared_ptr/thread/default_weaktoshared.cc:
2394         Likewise.
2395         * testsuite/20_util/shared_ptr/thread/mutex_weaktoshared.cc:
2396         Likewise.
2397         * testsuite/30_threads/async/42819.cc: Likewise.
2398         * testsuite/30_threads/async/49668.cc: Likewise.
2399         * testsuite/30_threads/async/54297.cc: Likewise.
2400         * testsuite/30_threads/async/any.cc: Likewise.
2401         * testsuite/30_threads/async/async.cc: Likewise.
2402         * testsuite/30_threads/async/except.cc: Likewise.
2403         * testsuite/30_threads/async/launch.cc: Likewise.
2404         * testsuite/30_threads/async/lwg2021.cc: Likewise.
2405         * testsuite/30_threads/async/sync.cc: Likewise. : Likewise.
2406         * testsuite/30_threads/call_once/39909.cc: Likewise.
2407         * testsuite/30_threads/call_once/49668.cc: Likewise.
2408         * testsuite/30_threads/call_once/60497.cc: Likewise.
2409         * testsuite/30_threads/call_once/call_once1.cc: Likewise.
2410         * testsuite/30_threads/call_once/dr2442.cc: Likewise.
2411         * testsuite/30_threads/condition_variable/54185.cc: Likewise.
2412         * testsuite/30_threads/condition_variable/cons/1.cc: Likewise.
2413         * testsuite/30_threads/condition_variable/members/1.cc: Likewise.
2414         * testsuite/30_threads/condition_variable/members/2.cc: Likewise.
2415         * testsuite/30_threads/condition_variable/members/3.cc: Likewise.
2416         * testsuite/30_threads/condition_variable/members/53841.cc: Likewise.
2417         * testsuite/30_threads/condition_variable/members/68519.cc: Likewise.
2418         * testsuite/30_threads/condition_variable/native_handle/typesizes.cc:
2419         Likewise.
2420         * testsuite/30_threads/condition_variable_any/50862.cc: Likewise.
2421         * testsuite/30_threads/condition_variable_any/53830.cc: Likewise.
2422         * testsuite/30_threads/condition_variable_any/cond.cc: Likewise.
2423         * testsuite/30_threads/condition_variable_any/cons/1.cc: Likewise.
2424         * testsuite/30_threads/condition_variable_any/members/1.cc: Likewise.
2425         * testsuite/30_threads/condition_variable_any/members/2.cc: Likewise.
2426         * testsuite/30_threads/future/cons/move.cc: Likewise.
2427         * testsuite/30_threads/future/members/45133.cc: Likewise.
2428         * testsuite/30_threads/future/members/get.cc: Likewise.
2429         * testsuite/30_threads/future/members/get2.cc: Likewise.
2430         * testsuite/30_threads/future/members/share.cc: Likewise.
2431         * testsuite/30_threads/future/members/valid.cc: Likewise.
2432         * testsuite/30_threads/future/members/wait.cc: Likewise.
2433         * testsuite/30_threads/future/members/wait_for.cc: Likewise.
2434         * testsuite/30_threads/future/members/wait_until.cc: Likewise.
2435         * testsuite/30_threads/lock/1.cc: Likewise.
2436         * testsuite/30_threads/lock/2.cc: Likewise.
2437         * testsuite/30_threads/lock/3.cc: Likewise.
2438         * testsuite/30_threads/lock/4.cc: Likewise.
2439         * testsuite/30_threads/mutex/cons/1.cc: Likewise.
2440         * testsuite/30_threads/mutex/dest/destructor_locked.cc: Likewise.
2441         * testsuite/30_threads/mutex/lock/1.cc: Likewise.
2442         * testsuite/30_threads/mutex/native_handle/1.cc: Likewise.
2443         * testsuite/30_threads/mutex/native_handle/typesizes.cc: Likewise.
2444         * testsuite/30_threads/mutex/try_lock/1.cc: Likewise.
2445         * testsuite/30_threads/mutex/try_lock/2.cc: Likewise.
2446         * testsuite/30_threads/mutex/unlock/1.cc: Likewise.
2447         * testsuite/30_threads/mutex/unlock/2.cc: Likewise.
2448         * testsuite/30_threads/packaged_task/49668.cc: Likewise.
2449         * testsuite/30_threads/packaged_task/60564.cc: Likewise.
2450         * testsuite/30_threads/packaged_task/cons/1.cc: Likewise.
2451         * testsuite/30_threads/packaged_task/cons/2.cc: Likewise.
2452         * testsuite/30_threads/packaged_task/cons/3.cc: Likewise.
2453         * testsuite/30_threads/packaged_task/cons/56492.cc: Likewise.
2454         * testsuite/30_threads/packaged_task/cons/alloc.cc: Likewise.
2455         * testsuite/30_threads/packaged_task/cons/move.cc: Likewise.
2456         * testsuite/30_threads/packaged_task/cons/move_assign.cc: Likewise.
2457         * testsuite/30_threads/packaged_task/members/at_thread_exit.cc:
2458         Likewise.
2459         * testsuite/30_threads/packaged_task/members/get_future.cc: Likewise.
2460         * testsuite/30_threads/packaged_task/members/get_future2.cc: Likewise.
2461         * testsuite/30_threads/packaged_task/members/invoke.cc: Likewise.
2462         * testsuite/30_threads/packaged_task/members/invoke2.cc: Likewise.
2463         * testsuite/30_threads/packaged_task/members/invoke3.cc: Likewise.
2464         * testsuite/30_threads/packaged_task/members/invoke4.cc: Likewise.
2465         * testsuite/30_threads/packaged_task/members/invoke5.cc: Likewise.
2466         * testsuite/30_threads/packaged_task/members/reset.cc: Likewise.
2467         * testsuite/30_threads/packaged_task/members/reset2.cc: Likewise.
2468         * testsuite/30_threads/packaged_task/members/swap.cc: Likewise.
2469         * testsuite/30_threads/packaged_task/members/valid.cc: Likewise.
2470         * testsuite/30_threads/promise/60966.cc: Likewise.
2471         * testsuite/30_threads/promise/cons/1.cc: Likewise.
2472         * testsuite/30_threads/promise/cons/alloc.cc: Likewise.
2473         * testsuite/30_threads/promise/cons/move.cc: Likewise.
2474         * testsuite/30_threads/promise/cons/move_assign.cc: Likewise.
2475         * testsuite/30_threads/promise/members/at_thread_exit.cc: Likewise.
2476         * testsuite/30_threads/promise/members/at_thread_exit2.cc: Likewise.
2477         * testsuite/30_threads/promise/members/get_future.cc: Likewise.
2478         * testsuite/30_threads/promise/members/get_future2.cc: Likewise.
2479         * testsuite/30_threads/promise/members/set_exception.cc: Likewise.
2480         * testsuite/30_threads/promise/members/set_exception2.cc: Likewise.
2481         * testsuite/30_threads/promise/members/set_value.cc: Likewise.
2482         * testsuite/30_threads/promise/members/set_value2.cc: Likewise.
2483         * testsuite/30_threads/promise/members/set_value3.cc: Likewise.
2484         * testsuite/30_threads/promise/members/swap.cc: Likewise.
2485         * testsuite/30_threads/recursive_mutex/cons/1.cc: Likewise.
2486         * testsuite/30_threads/recursive_mutex/dest/destructor_locked.cc:
2487         Likewise.
2488         * testsuite/30_threads/recursive_mutex/lock/1.cc: Likewise.
2489         * testsuite/30_threads/recursive_mutex/native_handle/1.cc: Likewise.
2490         * testsuite/30_threads/recursive_mutex/native_handle/typesizes.cc:
2491         Likewise.
2492         * testsuite/30_threads/recursive_mutex/try_lock/1.cc: Likewise.
2493         * testsuite/30_threads/recursive_mutex/try_lock/2.cc: Likewise.
2494         * testsuite/30_threads/recursive_mutex/unlock/1.cc: Likewise.
2495         * testsuite/30_threads/recursive_mutex/unlock/2.cc: Likewise.
2496         * testsuite/30_threads/recursive_timed_mutex/cons/1.cc: Likewise.
2497         * testsuite/30_threads/recursive_timed_mutex/dest/destructor_locked.cc:
2498         Likewise.
2499         * testsuite/30_threads/recursive_timed_mutex/lock/1.cc: Likewise.
2500         * testsuite/30_threads/recursive_timed_mutex/lock/2.cc: Likewise.
2501         * testsuite/30_threads/recursive_timed_mutex/native_handle/1.cc:
2502         Likewise.
2503         * testsuite/30_threads/recursive_timed_mutex/native_handle/typesizes.cc:
2504         Likewise.
2505         * testsuite/30_threads/recursive_timed_mutex/try_lock/1.cc: Likewise.
2506         * testsuite/30_threads/recursive_timed_mutex/try_lock/2.cc: Likewise.
2507         * testsuite/30_threads/recursive_timed_mutex/try_lock_for/1.cc:
2508         Likewise.
2509         * testsuite/30_threads/recursive_timed_mutex/try_lock_for/2.cc:
2510         Likewise.
2511         * testsuite/30_threads/recursive_timed_mutex/try_lock_for/3.cc:
2512         Likewise.
2513         * testsuite/30_threads/recursive_timed_mutex/try_lock_until/1.cc:
2514         Likewise.
2515         * testsuite/30_threads/recursive_timed_mutex/try_lock_until/2.cc:
2516         Likewise.
2517         * testsuite/30_threads/recursive_timed_mutex/unlock/1.cc: Likewise.
2518         * testsuite/30_threads/recursive_timed_mutex/unlock/2.cc: Likewise.
2519         * testsuite/30_threads/shared_future/cons/move.cc: Likewise.
2520         * testsuite/30_threads/shared_future/members/45133.cc: Likewise.
2521         * testsuite/30_threads/shared_future/members/get.cc: Likewise.
2522         * testsuite/30_threads/shared_future/members/get2.cc: Likewise.
2523         * testsuite/30_threads/shared_future/members/valid.cc: Likewise.
2524         * testsuite/30_threads/shared_future/members/wait.cc: Likewise.
2525         * testsuite/30_threads/shared_future/members/wait_for.cc: Likewise.
2526         * testsuite/30_threads/shared_future/members/wait_until.cc: Likewise.
2527         * testsuite/30_threads/shared_lock/cons/1.cc: Likewise.
2528         * testsuite/30_threads/shared_lock/cons/2.cc: Likewise.
2529         * testsuite/30_threads/shared_lock/cons/3.cc: Likewise.
2530         * testsuite/30_threads/shared_lock/cons/4.cc: Likewise.
2531         * testsuite/30_threads/shared_lock/cons/5.cc: Likewise.
2532         * testsuite/30_threads/shared_lock/cons/6.cc: Likewise.
2533         * testsuite/30_threads/shared_lock/locking/1.cc: Likewise.
2534         * testsuite/30_threads/shared_lock/locking/2.cc: Likewise.
2535         * testsuite/30_threads/shared_lock/locking/3.cc: Likewise.
2536         * testsuite/30_threads/shared_lock/locking/4.cc: Likewise.
2537         * testsuite/30_threads/shared_lock/modifiers/1.cc: Likewise.
2538         * testsuite/30_threads/shared_mutex/cons/1.cc: Likewise.
2539         * testsuite/30_threads/shared_mutex/try_lock/1.cc: Likewise.
2540         * testsuite/30_threads/shared_mutex/try_lock/2.cc: Likewise.
2541         * testsuite/30_threads/shared_mutex/unlock/1.cc: Likewise.
2542         * testsuite/30_threads/shared_timed_mutex/cons/1.cc: Likewise.
2543         * testsuite/30_threads/shared_timed_mutex/try_lock/1.cc: Likewise.
2544         * testsuite/30_threads/shared_timed_mutex/try_lock/2.cc: Likewise.
2545         * testsuite/30_threads/shared_timed_mutex/try_lock/3.cc: Likewise.
2546         * testsuite/30_threads/shared_timed_mutex/unlock/1.cc: Likewise.
2547         * testsuite/30_threads/this_thread/1.cc: Likewise.
2548         * testsuite/30_threads/this_thread/sleep_for-mt.cc: Likewise.
2549         * testsuite/30_threads/this_thread/sleep_until-mt.cc: Likewise.
2550         * testsuite/30_threads/thread/cons/1.cc: Likewise.
2551         * testsuite/30_threads/thread/cons/2.cc: Likewise.
2552         * testsuite/30_threads/thread/cons/3.cc: Likewise.
2553         * testsuite/30_threads/thread/cons/4.cc: Likewise.
2554         * testsuite/30_threads/thread/cons/49668.cc: Likewise.
2555         * testsuite/30_threads/thread/cons/5.cc: Likewise.
2556         * testsuite/30_threads/thread/cons/6.cc: Likewise.
2557         * testsuite/30_threads/thread/cons/7.cc: Likewise.
2558         * testsuite/30_threads/thread/cons/8.cc: Likewise.
2559         * testsuite/30_threads/thread/cons/9.cc: Likewise.
2560         * testsuite/30_threads/thread/cons/moveable.cc: Likewise.
2561         * testsuite/30_threads/thread/cons/terminate.cc: Likewise.
2562         * testsuite/30_threads/thread/members/1.cc: Likewise.
2563         * testsuite/30_threads/thread/members/2.cc: Likewise.
2564         * testsuite/30_threads/thread/members/3.cc: Likewise.
2565         * testsuite/30_threads/thread/members/4.cc: Likewise.
2566         * testsuite/30_threads/thread/members/5.cc: Likewise.
2567         * testsuite/30_threads/thread/members/hardware_concurrency.cc:
2568         Likewise.
2569         * testsuite/30_threads/thread/native_handle/typesizes.cc: Likewise.
2570         * testsuite/30_threads/thread/swap/1.cc: Likewise.
2571         * testsuite/30_threads/timed_mutex/cons/1.cc: Likewise.
2572         * testsuite/30_threads/timed_mutex/dest/destructor_locked.cc:
2573         Likewise.
2574         * testsuite/30_threads/timed_mutex/lock/1.cc: Likewise.
2575         * testsuite/30_threads/timed_mutex/native_handle/1.cc: Likewise.
2576         * testsuite/30_threads/timed_mutex/native_handle/typesizes.cc:
2577         Likewise.
2578         * testsuite/30_threads/timed_mutex/try_lock/1.cc: Likewise.
2579         * testsuite/30_threads/timed_mutex/try_lock/2.cc: Likewise.
2580         * testsuite/30_threads/timed_mutex/try_lock_for/1.cc: Likewise.
2581         * testsuite/30_threads/timed_mutex/try_lock_for/2.cc: Likewise.
2582         * testsuite/30_threads/timed_mutex/try_lock_for/3.cc: Likewise.
2583         * testsuite/30_threads/timed_mutex/try_lock_until/1.cc: Likewise.
2584         * testsuite/30_threads/timed_mutex/try_lock_until/2.cc: Likewise.
2585         * testsuite/30_threads/timed_mutex/try_lock_until/57641.cc: Likewise.
2586         * testsuite/30_threads/timed_mutex/unlock/1.cc: Likewise.
2587         * testsuite/30_threads/timed_mutex/unlock/2.cc: Likewise.
2588         * testsuite/30_threads/try_lock/1.cc: Likewise.
2589         * testsuite/30_threads/try_lock/2.cc: Likewise.
2590         * testsuite/30_threads/try_lock/3.cc: Likewise.
2591         * testsuite/30_threads/try_lock/4.cc: Likewise.
2592         * testsuite/30_threads/unique_lock/cons/1.cc: Likewise.
2593         * testsuite/30_threads/unique_lock/cons/2.cc: Likewise.
2594         * testsuite/30_threads/unique_lock/cons/3.cc: Likewise.
2595         * testsuite/30_threads/unique_lock/cons/4.cc: Likewise.
2596         * testsuite/30_threads/unique_lock/cons/5.cc: Likewise.
2597         * testsuite/30_threads/unique_lock/cons/6.cc: Likewise.
2598         * testsuite/30_threads/unique_lock/locking/1.cc: Likewise.
2599         * testsuite/30_threads/unique_lock/locking/2.cc: Likewise.
2600         * testsuite/30_threads/unique_lock/locking/3.cc: Likewise.
2601         * testsuite/30_threads/unique_lock/locking/4.cc: Likewise.
2602         * testsuite/30_threads/unique_lock/modifiers/1.cc: Likewise.
2603
2604 2020-08-21  Jonathan Wakely  <jwakely@redhat.com>
2605
2606         PR libstdc++/96736
2607         * testsuite/17_intro/headers/c++1998/all_attributes.cc: Do not
2608         test "cold" on darwin.
2609         * testsuite/17_intro/headers/c++2011/all_attributes.cc:
2610         Likewise.
2611         * testsuite/17_intro/headers/c++2014/all_attributes.cc:
2612         Likewise.
2613         * testsuite/17_intro/headers/c++2017/all_attributes.cc:
2614         Likewise.
2615         * testsuite/17_intro/headers/c++2020/all_attributes.cc:
2616         Likewise.
2617
2618 2020-08-21  Jonathan Wakely  <jwakely@redhat.com>
2619
2620         PR libstdc++/96718
2621         * testsuite/25_algorithms/pstl/feature_test-2.cc: Require
2622         tbb-backend effective target.
2623         * testsuite/25_algorithms/pstl/feature_test-3.cc: Likewise.
2624         * testsuite/25_algorithms/pstl/feature_test-5.cc: Likewise.
2625         * testsuite/25_algorithms/pstl/feature_test.cc: Likewise.
2626
2627 2020-08-20  Jonathan Wakely  <jwakely@redhat.com>
2628
2629         * include/bits/iterator_concepts.h [__STRICT_ANSI__]
2630         (incrementable_traits<__int128>): Define specialization.
2631         (incrementable_traits<unsigned __int128>): Likewise.
2632         * testsuite/std/ranges/iota/96042.cc: Test iota_view with
2633         __int128.
2634
2635 2020-08-19  Jonathan Wakely  <jwakely@redhat.com>
2636             Patrick Palka  <ppalka@redhat.com>
2637
2638         PR libstdc++/96042
2639         * include/bits/range_access.h (__detail::__to_unsigned_like):
2640         Do not use make_unsigned_t<T> in the return type, as it can
2641         result in an error before the integral<T> constraint is checked.
2642         [__STRICT_ANSI__]: Add overloads for 128-bit integer types.
2643         (__detail::__make_unsigned_like_t): Define as the return type
2644         of __to_unsigned_like.
2645         * testsuite/std/ranges/subrange/96042.cc: New test.
2646
2647 2020-08-19  Jonathan Wakely  <jwakely@redhat.com>
2648
2649         * include/bits/stl_tree.h (operator!=, operator>, operator<=)
2650         (operator>=): Remove deprecated functions.
2651
2652 2020-08-19  Jonathan Wakely  <jwakely@redhat.com>
2653
2654         PR libstdc++/96042
2655         * include/ext/numeric_traits.h (__is_integer_nonstrict): New
2656         trait which is true for 128-bit integers even in strict modes.
2657         (__numeric_traits_integer, __numeric_traits): Use
2658         __is_integer_nonstrict instead of __is_integer.
2659         * include/std/limits [__STRICT_ANSI__ && __SIZEOF_INT128__]
2660         (numeric_limits<__int128>, (numeric_limits<unsigned __int128>):
2661         Define.
2662         * testsuite/std/ranges/iota/96042.cc: New test.
2663
2664 2020-08-19  Jonathan Wakely  <jwakely@redhat.com>
2665
2666         * include/bits/c++config (_GLIBCXX_DEPRECATED_SUGGEST)
2667         (_GLIBCXX11_DEPRECATED, _GLIBCXX11_DEPRECATED_SUGGEST)
2668         (_GLIBCXX17_DEPRECATED_SUGGEST, _GLIBCXX20_DEPRECATED_SUGGEST):
2669         Add new macros to comment.
2670
2671 2020-08-19  Patrick Palka  <ppalka@redhat.com>
2672
2673         * include/Makefile.am (bits_headers): Add new header
2674         <bits/max_size_type.h>.
2675         * include/Makefile.in: Regenerate.
2676         * include/bits/iterator_concepts.h
2677         (ranges::__detail::__max_diff_type): Remove definition, replace
2678         with forward declaration of class __max_diff_type.
2679         (__detail::__max_size_type): Remove definition, replace with
2680         forward declaration of class __max_size_type.
2681         (__detail::__is_unsigned_int128, __is_signed_int128)
2682         (__is_int128): New concepts.
2683         (__detail::__is_integer_like): Accept __int128 and unsigned
2684         __int128.
2685         (__detail::__is_signed_integer_like): Accept __int128.
2686         * include/bits/max_size_type.h: New header.
2687         * include/bits/range_access.h: Include <bits/max_size_type.h>.
2688         (__detail::__to_unsigned_like): Two new overloads.
2689         * testsuite/std/ranges/iota/difference_type.cc: New test.
2690         * testsuite/std/ranges/iota/max_size_type.cc: New test.
2691
2692 2020-08-19  Jonathan Wakely  <jwakely@redhat.com>
2693
2694         * include/bits/c++config (_GLIBCXX_DEPRECATED): Define for all
2695         standard modes.
2696         (_GLIBCXX_DEPRECATED_SUGGEST): New macro for "use 'foo' instead"
2697         message in deprecated warnings.
2698         (_GLIBCXX11_DEPRECATED, _GLIBCXX11_DEPRECATED_SUGGEST): New
2699         macros for marking features deprecated in C++11.
2700         (_GLIBCXX17_DEPRECATED_SUGGEST, _GLIBCXX20_DEPRECATED_SUGGEST):
2701         New macros.
2702         * include/backward/auto_ptr.h (auto_ptr_ref, auto_ptr<void>):
2703         Use _GLIBCXX11_DEPRECATED instead of _GLIBCXX_DEPRECATED.
2704         (auto_ptr): Use _GLIBCXX11_DEPRECATED_SUGGEST.
2705         * include/backward/binders.h (binder1st, binder2nd): Likewise.
2706         * include/bits/ios_base.h (io_state, open_mode, seek_dir)
2707         (streampos, streamoff): Use _GLIBCXX_DEPRECATED_SUGGEST.
2708         * include/std/streambuf (stossc): Replace C++11 attribute
2709         with _GLIBCXX_DEPRECATED_SUGGEST.
2710         * include/std/type_traits (__is_nullptr_t): Use
2711         _GLIBCXX_DEPRECATED_SUGGEST instead of _GLIBCXX_DEPRECATED.
2712         * testsuite/27_io/types/1.cc: Check for deprecated warnings.
2713         Also check for io_state, open_mode and seek_dir typedefs.
2714
2715 2020-08-19  Antony Polukhin  <antoshkka@gmail.com>
2716
2717         PR libstdc++/71579
2718         * include/std/type_traits (invoke_result, is_nothrow_invocable_r)
2719         Add static_asserts to make sure that the argument of the type
2720         trait is not misused with incomplete types.
2721         (is_swappable_with, is_nothrow_swappable_with): Add static_asserts
2722         to make sure that the first and second arguments of the type trait
2723         are not misused with incomplete types.
2724         * testsuite/20_util/invoke_result/incomplete_neg.cc: New test.
2725         * testsuite/20_util/is_nothrow_invocable/incomplete_neg.cc: New test.
2726         * testsuite/20_util/is_nothrow_swappable/incomplete_neg.cc: New test.
2727         * testsuite/20_util/is_nothrow_swappable_with/incomplete_neg.cc: New
2728         test.
2729         * testsuite/20_util/is_swappable_with/incomplete_neg.cc: New test.
2730
2731 2020-08-18  David Edelsohn  <dje.gcc@gmail.com>
2732             Clement Chigot  <clement.chigot@atos.net>
2733
2734         * config/os/aix/t-aix: Add complementary mode object files to
2735         libsupc++.a
2736
2737 2020-08-18  Jonathan Wakely  <jwakely@redhat.com>
2738
2739         * testsuite/17_intro/headers/c++1998/all_attributes.cc: Check
2740         "cold" isn't used in the library. Also check <cxxabi.h>.
2741         * testsuite/17_intro/headers/c++2011/all_attributes.cc:
2742         Likewise.
2743         * testsuite/17_intro/headers/c++2014/all_attributes.cc:
2744         Likewise.
2745         * testsuite/17_intro/headers/c++2017/all_attributes.cc:
2746         Likewise.
2747         * testsuite/17_intro/headers/c++2020/all_attributes.cc:
2748         Likewise.
2749
2750 2020-08-18  Jonathan Wakely  <jwakely@redhat.com>
2751
2752         PR libstdc++/69724
2753         * include/std/future (__future_base::_S_make_deferred_state)
2754         (__future_base::_S_make_async_state): Remove.
2755         (__future_base::_Deferred_state): Change constructor to accept a
2756         parameter pack of arguments and forward them to the call
2757         wrapper.
2758         (__future_base::_Async_state_impl): Likewise. Replace lambda
2759         expression with a named member function.
2760         (async): Construct state object directly from the arguments,
2761         instead of using thread::__make_invoker, _S_make_deferred_state
2762         and _S_make_async_state. Move shared state into the returned
2763         future.
2764         * include/std/thread (thread::_Call_wrapper): New alias
2765         template for use by constructor and std::async.
2766         (thread::thread(Callable&&, Args&&...)): Create state object
2767         directly instead of using _S_make_state.
2768         (thread::__make_invoker, thread::__decayed_tuple)
2769         (thread::_S_make_state): Remove.
2770         * testsuite/30_threads/async/69724.cc: New test.
2771
2772 2020-08-17  Jonathan Wakely  <jwakely@redhat.com>
2773
2774         PR libstdc++/55713
2775         PR libstdc++/71096
2776         PR libstdc++/93147
2777         * include/std/tuple [__has_cpp_attribute(no_unique_address)]
2778         (_Head_base<Idx, Head, true>): New definition of the partial
2779         specialization, using [[no_unique_address]] instead of
2780         inheritance.
2781         * testsuite/libstdc++-prettyprinters/48362.cc: Adjust expected
2782         output.
2783         * testsuite/20_util/tuple/comparison_operators/93147.cc: New test.
2784         * testsuite/20_util/tuple/creation_functions/55713.cc: New test.
2785         * testsuite/20_util/tuple/element_access/71096.cc: New test.
2786
2787 2020-08-14  Lewis Hyatt  <lhyatt@gmail.com>
2788
2789         * testsuite/lib/libstdc++.exp: Use the new option
2790         -fdiagnostics-plain-output.
2791
2792 2020-08-13  Jonathan Wakely  <jwakely@redhat.com>
2793
2794         * acinclude.m4 (GLIBCXX_ENABLE_CHEADERS): Warn if the c_std
2795         option is used and fail unless --enable-cheaders-obsolete is
2796         also used.
2797         * configure: Regenerate.
2798
2799 2020-08-12  Jonathan Wakely  <jwakely@redhat.com>
2800
2801         PR libstdc++/85828
2802         * include/bits/basic_string.h (operator=(basic_string&&)): Check
2803         for self-move before copying with char_traits::copy.
2804         * include/bits/hashtable.h (operator=(_Hashtable&&)): Check for
2805         self-move.
2806         * include/bits/stl_deque.h (_M_move_assign1(deque&&, false_type)):
2807         Check for equal allocators.
2808         * include/bits/stl_list.h (_M_move_assign(list&&, true_type)):
2809         Call clear() instead of _M_clear().
2810         * include/debug/formatter.h (__msg_self_move_assign): Change
2811         comment.
2812         * include/debug/macros.h (__glibcxx_check_self_move_assign):
2813         (_GLIBCXX_DEBUG_VERIFY): Remove.
2814         * include/debug/safe_container.h (operator=(_Safe_container&&)):
2815         Remove assertion check for safe move and make it well-defined.
2816         * include/debug/safe_iterator.h (operator=(_Safe_iterator&&)):
2817         Remove assertion check for self-move.
2818         * include/debug/safe_local_iterator.h
2819         (operator=(_Safe_local_iterator&&)): Likewise.
2820         * testsuite/21_strings/basic_string/cons/char/self_move.cc: New test.
2821         * testsuite/23_containers/deque/cons/self_move.cc: New test.
2822         * testsuite/23_containers/forward_list/cons/self_move.cc: New test.
2823         * testsuite/23_containers/list/cons/self_move.cc: New test.
2824         * testsuite/23_containers/set/cons/self_move.cc: New test.
2825         * testsuite/23_containers/unordered_set/cons/self_move.cc: New test.
2826         * testsuite/23_containers/vector/cons/self_move.cc: New test.
2827
2828 2020-08-11  François Dumont  <fdumont@gcc.gnu.org>
2829
2830         PR libstdc++/91620
2831         * include/bits/forward_list.tcc (forward_list<>::remove): Collect nodes
2832         to destroy in an intermediate forward_list.
2833         (forward_list<>::remove_if, forward_list<>::unique): Likewise.
2834         * include/bits/list.tcc (list<>::remove, list<>::unique): Likewise.
2835         (list<>::remove_if): Likewise.
2836         * include/debug/forward_list (forward_list<>::_M_erase_after): Remove.
2837         (forward_list<>::erase_after): Adapt.
2838         (forward_list<>::remove, forward_list<>::remove_if): Collect nodes to
2839         destroy in an intermediate forward_list.
2840         (forward_list<>::unique): Likewise.
2841         * include/debug/list (list<>::remove, list<>::unique): Likewise.
2842         (list<>::remove_if): Likewise.
2843         * testsuite/23_containers/forward_list/operations/91620.cc: New test.
2844         * testsuite/23_containers/list/operations/91620.cc: New test.
2845
2846 2020-08-11  Jonathan Wakely  <jwakely@redhat.com>
2847
2848         * testsuite/30_threads/thread/cons/84535.cc: Use a custom
2849         namespace.
2850         * testsuite/30_threads/thread/cons/lwg2097.cc: Likewise.
2851
2852 2020-08-11  Jonathan Wakely  <jwakely@redhat.com>
2853
2854         PR libstdc++/89760
2855         * include/experimental/executor [!_GLIBCXX_HAS_GTHREADS]:
2856         (execution_context::mutex_type): Define dummy mutex type.
2857         (system_context): Use execution_context::mutex_type.
2858         (system_context) [!_GLIBCXX_HAS_GTHREADS]: Define dummy
2859         thread and condition variable types.
2860         [!_GLIBCXX_HAS_GTHREADS] (system_context::_M_run()): Do not
2861         define.
2862         (system_context::_M_post) [!_GLIBCXX_HAS_GTHREADS]: Throw
2863         an exception when threads aren't available.
2864         (strand::running_in_this_thread()): Defer to _M_state.
2865         (strand::_State::running_in_this_thread()): New function.
2866         (use_future_t): Do not depend on _GLIBCXX_USE_C99_STDINT_TR1.
2867         * include/experimental/io_context (io_context): Use the
2868         execution_context::mutex_type alias. Replace stack of thread
2869         IDs with counter.
2870         * testsuite/experimental/net/execution_context/use_service.cc:
2871         Enable test for non-pthread targets.
2872
2873 2020-08-11  Jonathan Wakely  <jwakely@redhat.com>
2874
2875         * include/experimental/executor (system_context::a__tag): Make
2876         default constructor explicit.
2877
2878 2020-08-11  Jonathan Wakely  <jwakely@redhat.com>
2879
2880         * include/experimental/executor (system_context::_M_run()):
2881         Fix predicate.
2882         * testsuite/experimental/net/system_context/1.cc: New test.
2883
2884 2020-08-11  Jonathan Wakely  <jwakely@redhat.com>
2885
2886         * include/std/stop_token: Check _GLIBCXX_HAS_GTHREADS using
2887         #ifdef instead of #if.
2888         (stop_token::_S_yield()): Check _GLIBCXX_HAS_GTHREADS before
2889         using __gthread_yield.
2890
2891 2020-08-11  Jonathan Wakely  <jwakely@redhat.com>
2892
2893         * include/std/thread [!_GLIBCXX_HAS_GTHREADS] (this_thread::yield)
2894         (this_thread::sleep_until): Define.
2895         [!_GLIBCXX_HAS_GTHREADS] (this_thread::sleep_for): Define. Replace
2896         use of __gthread_time_t typedef with timespec.
2897         * src/c++11/thread.cc [!_GLIBCXX_HAS_GTHREADS] (__sleep_for):
2898         Likewise.
2899         * testsuite/30_threads/this_thread/2.cc: Moved to...
2900         * testsuite/30_threads/this_thread/yield.cc: ...here.
2901         * testsuite/30_threads/this_thread/3.cc: Moved to...
2902         * testsuite/30_threads/this_thread/sleep_for-mt.cc: ...here.
2903         * testsuite/30_threads/this_thread/4.cc: Moved to...
2904         * testsuite/30_threads/this_thread/sleep_until-mt.cc: ...here.
2905         * testsuite/30_threads/this_thread/58038.cc: Add
2906         dg-require-sleep.
2907         * testsuite/30_threads/this_thread/60421.cc: Likewise.
2908         * testsuite/30_threads/this_thread/sleep_for.cc: New test.
2909         * testsuite/30_threads/this_thread/sleep_until.cc: New test.
2910
2911 2020-08-10  Jonathan Wakely  <jwakely@redhat.com>
2912
2913         PR libstdc++/94681
2914         * src/c++17/fs_ops.cc (read_symlink): Use posix::lstat instead
2915         of calling ::lstat directly.
2916         * src/filesystem/ops.cc (read_symlink): Likewise.
2917
2918 2020-08-10  Jonathan Wakely  <jwakely@redhat.com>
2919
2920         * python/libstdcxx/v6/printers.py (UniquePointerPrinter.__init__):
2921         Use gdb.Type.strip_typedefs().
2922         * testsuite/libstdc++-prettyprinters/compat.cc: Use a typedef in
2923         the emulated old type.
2924
2925 2020-08-10  Jonathan Wakely  <jwakely@redhat.com>
2926
2927         PR libstdc++/94681
2928         * acinclude.m4 (GLIBCXX_CHECK_FILESYSTEM_DEPS): Do not depend on
2929         $enable_libstdcxx_filesystem_ts.
2930         * configure: Regenerate.
2931
2932 2020-08-10  Jonathan Wakely  <jwakely@redhat.com>
2933
2934         PR libstdc++/93904
2935         * include/bits/stl_iterator.h (inserter): Do not deduce
2936         iterator type (LWG 561).
2937         * testsuite/24_iterators/insert_iterator/dr561.cc: New test.
2938
2939 2020-08-10  Jonathan Wakely  <jwakely@redhat.com>
2940
2941         * include/bits/basic_string.tcc [_GLIBCXX_USE_CXX11_ABI=0]
2942         (basic_string::reserve()): Do nothing if exceptions are not
2943         enabled.
2944
2945 2020-08-10  Jonathan Wakely  <jwakely@redhat.com>
2946
2947         PR libstdc++/95749
2948         * src/filesystem/ops-common.h [_GLIBCXX_FILESYSTEM_IS_WINDOWS]
2949         (stat_type): Change to __stat64.
2950         (stat): Use _wstat64.
2951
2952 2020-08-07  Jonathan Wakely  <jwakely@redhat.com>
2953
2954         PR libstdc++/96303
2955         * include/debug/bitset (bitset::operator==): Call _M_base() on
2956         right operand.
2957         (bitset::operator!=): Likewise, but don't define it at all when
2958         default comparisons are supported by the compiler.
2959         * testsuite/23_containers/bitset/operations/96303.cc: New test.
2960
2961 2020-08-07  Jonathan Wakely  <jwakely@redhat.com>
2962
2963         * testsuite/18_support/comparisons/algorithms/partial_order.cc:
2964         Replace VERIFY with static_assert where the compiler now
2965         allows it.
2966         * testsuite/18_support/comparisons/algorithms/weak_order.cc:
2967         Likewise.
2968
2969 2020-08-07  Jonathan Wakely  <jwakely@redhat.com>
2970
2971         * config/abi/pre/gnu.ver: Fix wildcards for wstring symbols.
2972
2973 2020-08-06  Andrew Luo  <andrewluotechnologies@outlook.com>
2974             Jonathan Wakely  <jwakely@redhat.com>
2975
2976         * config/abi/pre/gnu.ver (GLIBCXX_3.4): Use less greedy
2977         patterns for basic_string members.
2978         (GLIBCXX_3.4.29): Export new basic_string::reserve symbols.
2979         * doc/xml/manual/status_cxx2020.xml: Update P0966 status.
2980         * include/bits/basic_string.h (shrink_to_fit()): Call reserve().
2981         (reserve(size_type)): Remove default argument.
2982         (reserve()): Declare new overload.
2983         [!_GLIBCXX_USE_CXX11_ABI] (shrink_to_fit, reserve): Likewise.
2984         * include/bits/basic_string.tcc (reserve(size_type)): Remove
2985         support for shrinking capacity.
2986         (reserve()): Perform shrink-to-fit operation.
2987         [!_GLIBCXX_USE_CXX11_ABI] (reserve): Likewise.
2988         * testsuite/21_strings/basic_string/capacity/1.cc: Adjust to
2989         reflect new behavior.
2990         * testsuite/21_strings/basic_string/capacity/char/1.cc:
2991         Likewise.
2992         * testsuite/21_strings/basic_string/capacity/char/18654.cc:
2993         Likewise.
2994         * testsuite/21_strings/basic_string/capacity/char/2.cc:
2995         Likewise.
2996         * testsuite/21_strings/basic_string/capacity/wchar_t/1.cc:
2997         Likewise.
2998         * testsuite/21_strings/basic_string/capacity/wchar_t/18654.cc:
2999         Likewise.
3000         * testsuite/21_strings/basic_string/capacity/wchar_t/2.cc:
3001         Likewise.
3002
3003 2020-08-06  Jonathan Wakely  <jwakely@redhat.com>
3004
3005         * include/bits/basic_string.tcc
3006         (operator>>(basic_istream&, basic_string&)): Do not set eofbit
3007         if extraction stopped after in.width() characters.
3008         * src/c++98/istream-string.cc (operator>>(istream&, string&)):
3009         Likewise.
3010         * include/bits/istream.tcc (__istream_extract): Do not set
3011         eofbit if extraction stopped after n-1 characters.
3012         * src/c++98/istream.cc (__istream_extract): Likewise.
3013         * testsuite/21_strings/basic_string/inserters_extractors/char/13.cc: New test.
3014         * testsuite/21_strings/basic_string/inserters_extractors/wchar_t/13.cc: New test.
3015         * testsuite/27_io/basic_istream/extractors_character/char/5.cc: New test.
3016         * testsuite/27_io/basic_istream/extractors_character/wchar_t/5.cc: New test.
3017
3018 2020-08-06  Jonathan Wakely  <jwakely@redhat.com>
3019
3020         PR libstdc++/96484
3021         * src/c++17/fs_ops.cc (fs::read_symlink): Return an error
3022         immediately for non-symlinks.
3023         * src/filesystem/ops.cc (fs::read_symlink): Likewise.
3024
3025 2020-08-06  Jonathan Wakely  <jwakely@redhat.com>
3026
3027         * include/std/istream (operator>>(istream&, char*)): Add
3028         attributes to get warnings for pointers that are null or known
3029         to point to the end of a buffer. Request upper bound from
3030         __builtin_object_size check and handle zero-sized buffer case.
3031         (operator>>(istream&, signed char))
3032         (operator>>(istream&, unsigned char*)): Add attributes.
3033         * testsuite/27_io/basic_istream/extractors_character/char/overflow.cc:
3034         Check extracting into the middle of a buffer.
3035         * testsuite/27_io/basic_istream/extractors_character/wchar_t/overflow.cc: New test.
3036
3037 2020-08-05  Jonathan Wakely  <jwakely@redhat.com>
3038
3039         * include/std/atomic (atomic<T>::store): Reformat.
3040
3041 2020-08-05  Jonathan Wakely  <jwakely@redhat.com>
3042
3043         * doc/xml/manual/status_cxx2017.xml: Replace oneAPI DPC++ link
3044         with LLVM repo for PSTL.
3045         * doc/html/manual/status.html: Regenerate.
3046
3047 2020-08-05  Jonathan Wakely  <jwakely@redhat.com>
3048
3049         * config/abi/pre/gnu.ver (GLIBCXX_3.4.29): Export new symbols.
3050         * include/bits/istream.tcc (__istream_extract): New function
3051         template implementing both of operator>>(istream&, char*) and
3052         operator>>(istream&, char(&)[N]). Add explicit instantiation
3053         declaration for it. Remove explicit instantiation declarations
3054         for old function templates.
3055         * include/std/istream (__istream_extract): Declare.
3056         (operator>>(basic_istream<C,T>&, C*)): Define inline and simply
3057         call __istream_extract.
3058         (operator>>(basic_istream<char,T>&, signed char*)): Likewise.
3059         (operator>>(basic_istream<char,T>&, unsigned char*)): Likewise.
3060         (operator>>(basic_istream<C,T>&, C(7)[N])): Define for LWG 2499.
3061         (operator>>(basic_istream<char,T>&, signed char(&)[N])):
3062         Likewise.
3063         (operator>>(basic_istream<char,T>&, unsigned char(&)[N])):
3064         Likewise.
3065         * include/std/streambuf (basic_streambuf): Declare char overload
3066         of __istream_extract as a friend.
3067         * src/c++11/istream-inst.cc: Add explicit instantiation
3068         definition for wchar_t overload of __istream_extract. Remove
3069         explicit instantiation definitions of old operator>> overloads
3070         for versioned-namespace build.
3071         * src/c++98/istream.cc (operator>>(istream&, char*)): Replace
3072         with __istream_extract(istream&, char*, streamsize).
3073         * testsuite/27_io/basic_istream/extractors_character/char/3.cc:
3074         Do not use variable-length array.
3075         * testsuite/27_io/basic_istream/extractors_character/char/4.cc:
3076         Do not run test for C++20.
3077         * testsuite/27_io/basic_istream/extractors_character/char/9555-ic.cc:
3078         Do not test writing to pointers for C++20.
3079         * testsuite/27_io/basic_istream/extractors_character/char/9826.cc:
3080         Use array instead of pointer.
3081         * testsuite/27_io/basic_istream/extractors_character/wchar_t/3.cc:
3082         Do not use variable-length array.
3083         * testsuite/27_io/basic_istream/extractors_character/wchar_t/4.cc:
3084         Do not run test for C++20.
3085         * testsuite/27_io/basic_istream/extractors_character/wchar_t/9555-ic.cc:
3086         Do not test writing to pointers for C++20.
3087         * testsuite/27_io/basic_istream/extractors_character/char/lwg2499.cc:
3088         New test.
3089         * testsuite/27_io/basic_istream/extractors_character/char/lwg2499_neg.cc:
3090         New test.
3091         * testsuite/27_io/basic_istream/extractors_character/char/overflow.cc:
3092         New test.
3093         * testsuite/27_io/basic_istream/extractors_character/wchar_t/lwg2499.cc:
3094         New test.
3095         * testsuite/27_io/basic_istream/extractors_character/wchar_t/lwg2499_neg.cc:
3096         New test.
3097
3098 2020-08-01  Gerald Pfeifer  <gerald@pfeifer.com>
3099
3100         * doc/xml/manual/using_exceptions.xml: Move www.stroustrup.com to
3101         https.
3102         * doc/html/manual/using_exceptions.html: Regenerate.
3103
3104 2020-07-31  Gerald Pfeifer  <gerald@pfeifer.com>
3105
3106         * doc/xml/manual/status_cxx2017.xml: ParallelSTL is now part
3107         of oneAPI DPC++ Library on Github.
3108         * doc/html/manual/status.html: Regenerate.
3109
3110 2020-07-31  François Dumont  <fdumont@gcc.gnu.org>
3111
3112         * include/bits/stl_bvector.h
3113         [_GLIBCXX_INLINE_VERSION](_Bvector_impl_data::_M_start): Define as
3114         _Bit_type*.
3115         (_Bvector_impl_data(const _Bvector_impl_data&)): Default.
3116         (_Bvector_impl_data(_Bvector_impl_data&&)): Delegate to latter.
3117         (_Bvector_impl_data::operator=(const _Bvector_impl_data&)): Default.
3118         (_Bvector_impl_data::_M_move_data(_Bvector_impl_data&&)): Use latter.
3119         (_Bvector_impl_data::_M_reset()): Likewise.
3120         (_Bvector_impl_data::_M_swap_data): New.
3121         (_Bvector_impl::_Bvector_impl(_Bvector_impl&&)): Implement explicitely.
3122         (_Bvector_impl::_Bvector_impl(_Bit_alloc_type&&, _Bvector_impl&&)): New.
3123         (_Bvector_base::_Bvector_base(_Bvector_base&&, const allocator_type&)):
3124         New, use latter.
3125         (vector::vector(vector&&, const allocator_type&, true_type)): New, use
3126         latter.
3127         (vector::vector(vector&&, const allocator_type&, false_type)): New.
3128         (vector::vector(vector&&, const allocator_type&)): Use latters.
3129         (vector::vector(const vector&, const allocator_type&)): Adapt.
3130         [__cplusplus >= 201103](vector::vector(_InputIt, _InputIt,
3131         const allocator_type&)): Use _M_initialize_range.
3132         (vector::operator[](size_type)): Use iterator operator[].
3133         (vector::operator[](size_type) const): Use const_iterator operator[].
3134         (vector::swap(vector&)): Add assertions on allocators. Use _M_swap_data.
3135         [__cplusplus >= 201103](vector::insert(const_iterator, _InputIt,
3136         _InputIt)): Use _M_insert_range.
3137         (vector::_M_initialize(size_type)): Adapt.
3138         [__cplusplus >= 201103](vector::_M_initialize_dispatch): Remove.
3139         [__cplusplus >= 201103](vector::_M_insert_dispatch): Remove.
3140         * python/libstdcxx/v6/printers.py (StdVectorPrinter._iterator): Stop
3141         using start _M_offset.
3142         (StdVectorPrinter.to_string): Likewise.
3143         * testsuite/23_containers/vector/bool/allocator/swap.cc: Adapt.
3144         * testsuite/23_containers/vector/bool/cons/noexcept_move_construct.cc:
3145         Add check.
3146
3147 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
3148
3149         * testsuite/27_io/basic_istream/ignore/char/94749.cc: Use 0
3150         instead of nullptr.
3151         * testsuite/27_io/basic_istream/ignore/wchar_t/94749.cc:
3152         Likewise.
3153
3154 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
3155
3156         * testsuite/20_util/specialized_algorithms/uninitialized_fill_n/sizes.cc:
3157         Move struct to namespace scope.
3158
3159 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
3160
3161         * testsuite/26_numerics/numbers/float128.cc: Check
3162         __STRICT_ANSI__ before using __float128.
3163         * testsuite/std/concepts/concepts.lang/concept.arithmetic/floating_point.cc:
3164         Likewise.
3165
3166 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
3167
3168         * testsuite/18_support/set_terminate.cc: Require C++11 or
3169         higher.
3170         * testsuite/28_regex/simple_c++11.cc: Likewise.
3171         * testsuite/tr1/headers/c++200x/complex.cc: Likewise.
3172         * testsuite/24_iterators/headers/iterator/synopsis.cc:
3173         Require C++14 or lower.
3174
3175 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
3176
3177         * testsuite/23_containers/span/back_assert_neg.cc: Split c++2a
3178         effective-target from xfail selector.
3179         * testsuite/23_containers/span/first_2_assert_neg.cc: Likewise.
3180         * testsuite/23_containers/span/first_assert_neg.cc: Likewise.
3181         * testsuite/23_containers/span/front_assert_neg.cc: Likewise.
3182         * testsuite/23_containers/span/index_op_assert_neg.cc: Likewise.
3183         * testsuite/23_containers/span/last_2_assert_neg.cc: Likewise.
3184         * testsuite/23_containers/span/last_assert_neg.cc: Likewise.
3185         * testsuite/23_containers/span/subspan_2_assert_neg.cc:
3186         Likewise.
3187         * testsuite/23_containers/span/subspan_3_assert_neg.cc:
3188         Likewise.
3189         * testsuite/23_containers/span/subspan_4_assert_neg.cc:
3190         Likewise.
3191         * testsuite/23_containers/span/subspan_5_assert_neg.cc:
3192         Likewise.
3193         * testsuite/23_containers/span/subspan_6_assert_neg.cc:
3194         Likewise.
3195         * testsuite/23_containers/span/subspan_assert_neg.cc: Likewise.
3196
3197 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
3198
3199         * testsuite/20_util/reference_wrapper/83427.cc: Adjust
3200         effective-target to specific language mode only.
3201         * testsuite/24_iterators/headers/iterator/range_access_c++11.cc:
3202         Likewise.
3203         * testsuite/24_iterators/headers/iterator/range_access_c++14.cc:
3204         Likewise.
3205         * testsuite/24_iterators/headers/iterator/synopsis_c++11.cc:
3206         Likewise.
3207         * testsuite/24_iterators/headers/iterator/synopsis_c++14.cc:
3208         Likewise.
3209         * testsuite/26_numerics/valarray/69116.cc:
3210         Likewise.
3211         * testsuite/30_threads/headers/condition_variable/std_c++0x_neg.cc:
3212         Remove whitespace at end of file.
3213         * testsuite/30_threads/headers/future/std_c++0x_neg.cc:
3214         Likewise.
3215
3216 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
3217
3218         * testsuite/17_intro/headers/c++2017/all_attributes.cc: Add
3219         c++17 effective-target.
3220         * testsuite/17_intro/headers/c++2017/all_no_exceptions.cc:
3221         Likewise.
3222         * testsuite/17_intro/headers/c++2017/all_no_rtti.cc: Likewise.
3223         * testsuite/17_intro/headers/c++2017/all_pedantic_errors.cc:
3224         Likewise.
3225         * testsuite/17_intro/headers/c++2017/operator_names.cc:
3226         Likewise.
3227         * testsuite/17_intro/headers/c++2017/stdc++.cc: Likewise.
3228         * testsuite/17_intro/headers/c++2017/stdc++_multiple_inclusion.cc:
3229         Likewise.
3230         * testsuite/18_support/uncaught_exceptions/uncaught_exceptions.cc:
3231         Likewise.
3232         * testsuite/19_diagnostics/error_code/is_error_code_v.cc:
3233         Likewise.
3234         * testsuite/20_util/any/assign/1.cc: Likewise.
3235         * testsuite/20_util/any/assign/2.cc: Likewise.
3236         * testsuite/20_util/any/assign/emplace.cc: Likewise.
3237         * testsuite/20_util/any/assign/exception.cc: Likewise.
3238         * testsuite/20_util/any/assign/self.cc: Likewise.
3239         * testsuite/20_util/any/cons/1.cc: Likewise.
3240         * testsuite/20_util/any/cons/2.cc: Likewise.
3241         * testsuite/20_util/any/cons/aligned.cc: Likewise.
3242         * testsuite/20_util/any/cons/explicit.cc: Likewise.
3243         * testsuite/20_util/any/cons/in_place.cc: Likewise.
3244         * testsuite/20_util/any/cons/nontrivial.cc: Likewise.
3245         * testsuite/20_util/any/make_any.cc: Likewise.
3246         * testsuite/20_util/any/misc/any_cast.cc: Likewise.
3247         * testsuite/20_util/any/misc/any_cast_no_rtti.cc: Likewise.
3248         * testsuite/20_util/any/misc/swap.cc: Likewise.
3249         * testsuite/20_util/any/modifiers/1.cc: Likewise.
3250         * testsuite/20_util/any/observers/type.cc: Likewise.
3251         * testsuite/20_util/any/requirements.cc: Likewise.
3252         * testsuite/20_util/any/typedefs.cc: Likewise.
3253         * testsuite/20_util/as_const/1.cc: Likewise.
3254         * testsuite/20_util/as_const/rvalue_neg.cc: Likewise.
3255         * testsuite/20_util/bind/is_placeholder_v.cc: Likewise.
3256         * testsuite/20_util/bool_constant/requirements.cc: Likewise.
3257         * testsuite/20_util/duration/requirements/treat_as_floating_point_v.cc:
3258         Likewise.
3259         * testsuite/20_util/duration_cast/rounding.cc: Likewise.
3260         * testsuite/20_util/enable_shared_from_this/members/weak_from_this.cc:
3261         Likewise.
3262         * testsuite/20_util/function_objects/invoke/59768.cc: Likewise.
3263         * testsuite/20_util/function_objects/not_fn/1.cc: Likewise.
3264         * testsuite/20_util/function_objects/searchers.cc: Likewise.
3265         * testsuite/20_util/in_place/requirements.cc: Likewise.
3266         * testsuite/20_util/is_invocable/requirements/explicit_instantiation.cc:
3267         Likewise.
3268         * testsuite/20_util/is_invocable/requirements/typedefs.cc:
3269         Likewise.
3270         * testsuite/20_util/is_invocable/value.cc: Likewise.
3271         * testsuite/20_util/is_nothrow_invocable/requirements/explicit_instantiation.cc:
3272         Likewise.
3273         * testsuite/20_util/is_nothrow_invocable/requirements/typedefs.cc:
3274         Likewise.
3275         * testsuite/20_util/is_nothrow_swappable/requirements/explicit_instantiation.cc:
3276         Likewise.
3277         * testsuite/20_util/is_nothrow_swappable/requirements/typedefs.cc:
3278         Likewise.
3279         * testsuite/20_util/is_nothrow_swappable/value.cc: Likewise.
3280         * testsuite/20_util/is_nothrow_swappable_with/requirements/explicit_instantiation.cc:
3281         Likewise.
3282         * testsuite/20_util/is_nothrow_swappable_with/requirements/typedefs.cc:
3283         Likewise.
3284         * testsuite/20_util/is_nothrow_swappable_with/value.cc:
3285         Likewise.
3286         * testsuite/20_util/is_swappable/requirements/explicit_instantiation.cc:
3287         Likewise.
3288         * testsuite/20_util/is_swappable/requirements/typedefs.cc:
3289         Likewise.
3290         * testsuite/20_util/is_swappable/value.cc: Likewise.
3291         * testsuite/20_util/is_swappable_with/requirements/explicit_instantiation.cc:
3292         Likewise.
3293         * testsuite/20_util/is_swappable_with/requirements/typedefs.cc:
3294         Likewise.
3295         * testsuite/20_util/is_swappable_with/value.cc: Likewise.
3296         * testsuite/20_util/logical_traits/requirements/explicit_instantiation.cc:
3297         Likewise.
3298         * testsuite/20_util/logical_traits/requirements/typedefs.cc:
3299         Likewise.
3300         * testsuite/20_util/logical_traits/value.cc: Likewise.
3301         * testsuite/20_util/optional/constexpr/make_optional.cc: Likewise.
3302         * testsuite/20_util/optional/constexpr/observers/2.cc: Likewise.
3303         * testsuite/20_util/optional/constexpr/observers/3.cc: Likewise.
3304         * testsuite/20_util/optional/hash.cc: Likewise.
3305         * testsuite/20_util/pair/swap_cxx17.cc: Likewise.
3306         * testsuite/20_util/ratio/requirements/ratio_equal_v.cc: Likewise.
3307         * testsuite/20_util/shared_ptr/requirements/weak_type.cc:
3308         Likewise.
3309         * testsuite/20_util/specialized_algorithms/memory_management_tools/1.cc:
3310         Likewise.
3311         * testsuite/20_util/tuple/apply/1.cc: Likewise.
3312         * testsuite/20_util/tuple/make_from_tuple/1.cc: Likewise.
3313         * testsuite/20_util/tuple/swap_cxx17.cc: Likewise.
3314         * testsuite/20_util/tuple/tuple_size_v.cc: Likewise.
3315         * testsuite/20_util/unique_ptr/specialized_algorithms/swap_cxx17.cc:
3316         Likewise.
3317         * testsuite/20_util/uses_allocator/requirements/uses_allocator_v.cc:
3318         Likewise.
3319         * testsuite/20_util/variant/any.cc: Likewise.
3320         * testsuite/20_util/variant/compile.cc: Likewise.
3321         * testsuite/20_util/variant/hash.cc: Likewise.
3322         * testsuite/20_util/variant/index_type.cc: Likewise.
3323         * testsuite/20_util/variant/run.cc: Likewise.
3324         * testsuite/20_util/void_t/1.cc: Likewise.
3325         * testsuite/21_strings/basic_string/79162.cc: Likewise.
3326         * testsuite/21_strings/basic_string/cons/char/7.cc: Likewise.
3327         * testsuite/21_strings/basic_string/cons/wchar_t/7.cc: Likewise.
3328         * testsuite/21_strings/basic_string/lwg2758.cc: Likewise.
3329         * testsuite/21_strings/basic_string/lwg2946.cc: Likewise.
3330         * testsuite/21_strings/basic_string/modifiers/append/char/4.cc:
3331         Likewise.
3332         * testsuite/21_strings/basic_string/modifiers/append/wchar_t/4.cc:
3333         Likewise.
3334         * testsuite/21_strings/basic_string/modifiers/assign/char/4.cc:
3335         Likewise.
3336         * testsuite/21_strings/basic_string/modifiers/assign/wchar_t/4.cc:
3337         Likewise.
3338         * testsuite/21_strings/basic_string/modifiers/insert/char/3.cc:
3339         Likewise.
3340         * testsuite/21_strings/basic_string/modifiers/insert/wchar_t/3.cc:
3341         Likewise.
3342         * testsuite/21_strings/basic_string/modifiers/replace/char/7.cc:
3343         Likewise.
3344         * testsuite/21_strings/basic_string/modifiers/replace/wchar_t/7.cc:
3345         Likewise.
3346         * testsuite/21_strings/basic_string/operations/compare/char/2.cc:
3347         Likewise.
3348         * testsuite/21_strings/basic_string/operations/compare/wchar_t/2.cc:
3349         Likewise.
3350         * testsuite/21_strings/basic_string/operations/data/char/2.cc:
3351         Likewise.
3352         * testsuite/21_strings/basic_string/operations/data/wchar_t/2.cc:
3353         Likewise.
3354         * testsuite/21_strings/basic_string/operations/find/char/5.cc:
3355         Likewise.
3356         * testsuite/21_strings/basic_string/operations/find/wchar_t/5.cc:
3357         Likewise.
3358         * testsuite/21_strings/basic_string/operators/char/5.cc: Likewise.
3359         * testsuite/21_strings/basic_string/operators/wchar_t/5.cc:
3360         Likewise.
3361         * testsuite/21_strings/basic_string_view/capacity/1.cc: Likewise.
3362         * testsuite/21_strings/basic_string_view/cons/char/1.cc: Likewise.
3363         * testsuite/21_strings/basic_string_view/cons/char/2.cc: Likewise.
3364         * testsuite/21_strings/basic_string_view/cons/char/3.cc: Likewise.
3365         * testsuite/21_strings/basic_string_view/cons/wchar_t/1.cc:
3366         Likewise.
3367         * testsuite/21_strings/basic_string_view/cons/wchar_t/2.cc:
3368         Likewise.
3369         * testsuite/21_strings/basic_string_view/cons/wchar_t/3.cc:
3370         Likewise.
3371         * testsuite/21_strings/basic_string_view/element_access/char/1.cc:
3372         Likewise.
3373         * testsuite/21_strings/basic_string_view/element_access/char/2.cc:
3374         Likewise.
3375         * testsuite/21_strings/basic_string_view/element_access/char/empty.cc:
3376         Likewise.
3377         * testsuite/21_strings/basic_string_view/element_access/char/front_back.cc:
3378         Likewise.
3379         * testsuite/21_strings/basic_string_view/element_access/wchar_t/1.cc:
3380         Likewise.
3381         * testsuite/21_strings/basic_string_view/element_access/wchar_t/2.cc:
3382         Likewise.
3383         * testsuite/21_strings/basic_string_view/element_access/wchar_t/empty.cc:
3384         Likewise.
3385         * testsuite/21_strings/basic_string_view/element_access/wchar_t/front_back.cc:
3386         Likewise.
3387         * testsuite/21_strings/basic_string_view/include.cc: Likewise.
3388         * testsuite/21_strings/basic_string_view/inserters/char/1.cc:
3389         Likewise.
3390         * testsuite/21_strings/basic_string_view/inserters/char/2.cc:
3391         Likewise.
3392         * testsuite/21_strings/basic_string_view/inserters/char/3.cc:
3393         Likewise.
3394         * testsuite/21_strings/basic_string_view/inserters/pod/10081-out.cc:
3395         Likewise.
3396         * testsuite/21_strings/basic_string_view/inserters/wchar_t/1.cc:
3397         Likewise.
3398         * testsuite/21_strings/basic_string_view/inserters/wchar_t/2.cc:
3399         Likewise.
3400         * testsuite/21_strings/basic_string_view/inserters/wchar_t/3.cc:
3401         Likewise.
3402         * testsuite/21_strings/basic_string_view/literals/types-char8_t.cc:
3403         Likewise.
3404         * testsuite/21_strings/basic_string_view/literals/types.cc:
3405         Likewise.
3406         * testsuite/21_strings/basic_string_view/literals/values-char8_t.cc:
3407         Likewise.
3408         * testsuite/21_strings/basic_string_view/literals/values.cc:
3409         Likewise.
3410         * testsuite/21_strings/basic_string_view/modifiers/remove_prefix/char/1.cc:
3411         Likewise.
3412         * testsuite/21_strings/basic_string_view/modifiers/remove_prefix/wchar_t/1.cc:
3413         Likewise.
3414         * testsuite/21_strings/basic_string_view/modifiers/remove_suffix/char/1.cc:
3415         Likewise.
3416         * testsuite/21_strings/basic_string_view/modifiers/remove_suffix/wchar_t/1.cc:
3417         Likewise.
3418         * testsuite/21_strings/basic_string_view/operations/compare/char/1.cc:
3419         Likewise.
3420         * testsuite/21_strings/basic_string_view/operations/compare/char/13650.cc:
3421         Likewise.
3422         * testsuite/21_strings/basic_string_view/operations/compare/wchar_t/1.cc:
3423         Likewise.
3424         * testsuite/21_strings/basic_string_view/operations/compare/wchar_t/13650.cc:
3425         Likewise.
3426         * testsuite/21_strings/basic_string_view/operations/copy/char/1.cc:
3427         Likewise.
3428         * testsuite/21_strings/basic_string_view/operations/copy/wchar_t/1.cc:
3429         Likewise.
3430         * testsuite/21_strings/basic_string_view/operations/data/char/1.cc:
3431         Likewise.
3432         * testsuite/21_strings/basic_string_view/operations/data/wchar_t/1.cc:
3433         Likewise.
3434         * testsuite/21_strings/basic_string_view/operations/find/char/1.cc:
3435         Likewise.
3436         * testsuite/21_strings/basic_string_view/operations/find/char/2.cc:
3437         Likewise.
3438         * testsuite/21_strings/basic_string_view/operations/find/char/3.cc:
3439         Likewise.
3440         * testsuite/21_strings/basic_string_view/operations/find/char/4.cc:
3441         Likewise.
3442         * testsuite/21_strings/basic_string_view/operations/find/wchar_t/1.cc:
3443         Likewise.
3444         * testsuite/21_strings/basic_string_view/operations/find/wchar_t/2.cc:
3445         Likewise.
3446         * testsuite/21_strings/basic_string_view/operations/find/wchar_t/3.cc:
3447         Likewise.
3448         * testsuite/21_strings/basic_string_view/operations/find/wchar_t/4.cc:
3449         Likewise.
3450         * testsuite/21_strings/basic_string_view/operations/rfind/char/1.cc:
3451         Likewise.
3452         * testsuite/21_strings/basic_string_view/operations/rfind/char/2.cc:
3453         Likewise.
3454         * testsuite/21_strings/basic_string_view/operations/rfind/char/3.cc:
3455         Likewise.
3456         * testsuite/21_strings/basic_string_view/operations/rfind/wchar_t/1.cc:
3457         Likewise.
3458         * testsuite/21_strings/basic_string_view/operations/rfind/wchar_t/2.cc:
3459         Likewise.
3460         * testsuite/21_strings/basic_string_view/operations/rfind/wchar_t/3.cc:
3461         Likewise.
3462         * testsuite/21_strings/basic_string_view/operations/string_conversion/1.cc:
3463         Likewise.
3464         * testsuite/21_strings/basic_string_view/operations/substr/char/1.cc:
3465         Likewise.
3466         * testsuite/21_strings/basic_string_view/operations/substr/wchar_t/1.cc:
3467         Likewise.
3468         * testsuite/21_strings/basic_string_view/range_access/char/1.cc:
3469         Likewise.
3470         * testsuite/21_strings/basic_string_view/range_access/wchar_t/1.cc:
3471         Likewise.
3472         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/1.cc:
3473         Likewise.
3474         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/char/1.cc:
3475         Likewise.
3476         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/char16_t/1.cc:
3477         Likewise.
3478         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/char32_t/1.cc:
3479         Likewise.
3480         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/char8_t/1.cc:
3481         Likewise.
3482         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/wchar_t/1.cc:
3483         Likewise.
3484         * testsuite/21_strings/basic_string_view/requirements/typedefs.cc:
3485         Likewise.
3486         * testsuite/21_strings/basic_string_view/typedefs.cc: Likewise.
3487         * testsuite/21_strings/basic_string_view/types/1.cc: Likewise.
3488         * testsuite/23_containers/array/specialized_algorithms/swap_cxx17.cc:
3489         Likewise.
3490         * testsuite/23_containers/map/modifiers/extract.cc: Likewise.
3491         * testsuite/23_containers/map/modifiers/insert_or_assign/1.cc:
3492         Likewise.
3493         * testsuite/23_containers/map/modifiers/merge.cc: Likewise.
3494         * testsuite/23_containers/map/modifiers/try_emplace/1.cc: Likewise.
3495         * testsuite/23_containers/multimap/modifiers/extract.cc: Likewise.
3496         * testsuite/23_containers/multimap/modifiers/merge.cc: Likewise.
3497         * testsuite/23_containers/multiset/modifiers/extract.cc: Likewise.
3498         * testsuite/23_containers/multiset/modifiers/merge.cc: Likewise.
3499         * testsuite/23_containers/set/modifiers/extract.cc: Likewise.
3500         * testsuite/23_containers/set/modifiers/merge.cc: Likewise.
3501         * testsuite/23_containers/unordered_map/modifiers/extract.cc:
3502         Likewise.
3503         * testsuite/23_containers/unordered_map/modifiers/insert_or_assign.cc:
3504         Likewise.
3505         * testsuite/23_containers/unordered_map/modifiers/merge.cc:
3506         Likewise.
3507         * testsuite/23_containers/unordered_map/modifiers/try_emplace.cc:
3508         Likewise.
3509         * testsuite/23_containers/unordered_multimap/modifiers/extract.cc:
3510         Likewise.
3511         * testsuite/23_containers/unordered_multimap/modifiers/merge.cc:
3512         Likewise.
3513         * testsuite/23_containers/unordered_multiset/modifiers/extract.cc:
3514         Likewise.
3515         * testsuite/23_containers/unordered_multiset/modifiers/merge.cc:
3516         Likewise.
3517         * testsuite/23_containers/unordered_set/modifiers/extract.cc:
3518         Likewise.
3519         * testsuite/23_containers/unordered_set/modifiers/merge.cc:
3520         Likewise.
3521         * testsuite/24_iterators/headers/iterator/range_access_c++17.cc:
3522         Likewise.
3523         * testsuite/24_iterators/headers/iterator/synopsis_c++17.cc:
3524         Likewise.
3525         * testsuite/25_algorithms/clamp/1.cc: Likewise.
3526         * testsuite/25_algorithms/clamp/2.cc: Likewise.
3527         * testsuite/25_algorithms/clamp/constexpr.cc: Likewise.
3528         * testsuite/25_algorithms/clamp/requirements/explicit_instantiation/1.cc:
3529         Likewise.
3530         * testsuite/25_algorithms/clamp/requirements/explicit_instantiation/pod.cc:
3531         Likewise.
3532         * testsuite/26_numerics/headers/cmath/functions_std_c++17.cc:
3533         Likewise.
3534         * testsuite/26_numerics/headers/cmath/special_functions_global.cc:
3535         Likewise.
3536         * testsuite/27_io/basic_ostream/inserters_other/char/lwg2221.cc:
3537         Likewise.
3538         * testsuite/29_atomics/atomic/is_always_lock_free.cc: Likewise.
3539         * testsuite/29_atomics/atomic_integral/is_always_lock_free.cc:
3540         Likewise.
3541         * testsuite/30_threads/shared_lock/70766.cc: Likewise.
3542         * testsuite/30_threads/shared_mutex/cons/1.cc: Likewise.
3543         * testsuite/30_threads/shared_mutex/cons/assign_neg.cc:
3544         Likewise.
3545         * testsuite/30_threads/shared_mutex/cons/copy_neg.cc:
3546         Likewise.
3547         * testsuite/30_threads/shared_mutex/requirements/standard_layout.cc:
3548         Likewise.
3549         * testsuite/30_threads/shared_mutex/try_lock/1.cc: Likewise.
3550         * testsuite/30_threads/shared_mutex/try_lock/2.cc: Likewise.
3551         * testsuite/30_threads/shared_mutex/unlock/1.cc: Likewise.
3552
3553 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
3554
3555         PR libstdc++/96382
3556         * include/bits/stl_iterator.h (reverse_iterator): Friend
3557         declaration should not depend on __cplusplus.
3558
3559 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
3560
3561         * testsuite/experimental/filesystem/filesystem_error/cons.cc:
3562         Remove -std=gnu++17 option.
3563
3564 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
3565
3566         * testsuite/20_util/is_aggregate/value.cc: Adjust for changes to
3567         definition of aggregates in C++20.
3568         * testsuite/20_util/optional/requirements.cc: Adjust for
3569         defaulted comparisons in C++20.
3570
3571 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
3572
3573         * testsuite/20_util/tuple/78939.cc: Suppress warnings about
3574         deprecation of volatile-qualified structured bindings in C++20.
3575         * testsuite/20_util/variable_templates_for_traits.cc: Likewise
3576         for deprecation of is_pod in C++20
3577
3578 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
3579
3580         * testsuite/20_util/time_point_cast/rounding.cc: Remove
3581         duplicate dg-do directive and add c++17 effective target.
3582
3583 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
3584
3585         * src/c++17/floating_from_chars.cc (from_chars_impl): Use
3586         LC_ALL_MASK not LC_ALL.
3587
3588 2020-07-31  Richard Biener  <rguenther@suse.de>
3589
3590         PR debug/96383
3591         * testsuite/20_util/assume_aligned/3.cc: Use -g0.
3592
3593 2020-07-30  Jonathan Wakely  <jwakely@redhat.com>
3594
3595         * include/bits/basic_string.h (size_type, difference_type):
3596         Use allocator_traits to obtain the allocator's size_type and
3597         difference_type.
3598
3599 2020-07-30  Jonathan Wakely  <jwakely@redhat.com>
3600
3601         PR libstdc++/96279
3602         * src/c++17/floating_from_chars.cc (from_chars_impl): Use
3603         isinf unqualified.
3604         [!_GLIBCXX_USE_C99_STDLIB]: Use strtod for float and long
3605         double.
3606
3607 2020-07-30  Jonathan Wakely  <jwakely@redhat.com>
3608
3609         * testsuite/23_containers/unordered_multiset/cons/noexcept_default_construct.cc:
3610         Use allocator with the correct value type.
3611         * testsuite/23_containers/unordered_set/cons/noexcept_default_construct.cc:
3612         Likewise.
3613
3614 2020-07-30  Jonathan Wakely  <jwakely@redhat.com>
3615
3616         * testsuite/20_util/from_chars/4.cc: Pass non-const iterator
3617         to string::insert.
3618
3619 2020-07-30  Jonathan Wakely  <jwakely@redhat.com>
3620
3621         * include/bits/iterator_concepts.h (__detail::__cv_bool): New
3622         helper concept.
3623         (__detail::__integral_nonbool): Likewise.
3624         (__detail::__is_integer_like): Use __integral_nonbool.
3625         * testsuite/std/ranges/access/lwg3467.cc: New test.
3626
3627 2020-07-30  Jonathan Wakely  <jwakely@redhat.com>
3628
3629         * testsuite/20_util/from_chars/4.cc: Use dg-add-options ieee.
3630         * testsuite/29_atomics/atomic_float/1.cc: Likewise.
3631
3632 2020-07-30  Jonathan Wakely  <jwakely@redhat.com>
3633
3634         * testsuite/23_containers/vector/bool/72847.cc: Use the
3635         exceptions_enabled effective-target keyword instead of
3636         checking for an explicit -fno-exceptions option.
3637         * testsuite/util/testsuite_abi.cc (examine_symbol): Remove
3638         redundant try-catch.
3639         * testsuite/util/testsuite_allocator.h [!__cpp_exceptions]:
3640         Do not define check_allocate_max_size and memory_resource.
3641         * testsuite/util/testsuite_containers.h: Replace comment with
3642         #error if wrong standard dialect used.
3643         * testsuite/util/testsuite_shared.cc: Likewise.
3644
3645 2020-07-29  François Dumont  <fdumont@gcc.gnu.org>
3646
3647         * include/bits/hashtable_policy.h (_Node_iterator_base()): New.
3648         (operator==(const _Node_iterator_base&, const _Node_iterator_base&)):
3649         Make hidden friend.
3650         (operator!=(const _Node_iterator_base&, const _Node_iterator_base&)):
3651         Make hidden friend.
3652         (_Local_iterator_base<>): Inherits _Node_iterator_base.
3653         (_Local_iterator_base<>::_M_cur): Remove.
3654         (_Local_iterator_base<>::_M_curr()): Remove.
3655         (operator==(const _Local_iterator_base&, const _Local_iterator_base&)):
3656         Remove.
3657         (operator!=(const _Local_iterator_base&, const _Local_iterator_base&)):
3658         Remove.
3659         * include/debug/unordered_map (unordered_map<>::_M_invalidate): Adapt.
3660         (unordered_multimap<>::_M_invalidate): Adapt.
3661         * include/debug/unordered_set (unordered_set<>::_M_invalidate): Adapt.
3662         (unordered_multiset<>::_M_invalidate): Adapt.
3663
3664 2020-07-29  David Edelsohn  <dje.gcc@gmail.com>
3665             Jonathan Wakely  <jwakely@redhat.com>
3666             Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
3667
3668         * testsuite/lib/dg-options.exp (add_options_for_libatomic): Add
3669         target powerpc-ibm-aix* and powerpc*-*-darwin*.
3670         * testsuite/29_atomics/atomic_float/value_init.cc: Add options
3671         for libatomic.
3672
3673 2020-07-29  François Dumont  <fdumont@gcc.gnu.org>
3674
3675         * include/bits/hashtable.h
3676         (_Hashtable(_Hashtable&& __ht, __node_alloc_type&& __a, true_type)):
3677         Add noexcept qualification.
3678         (_Hashtable(_Hashtable&&)): Fix noexcept qualification.
3679         (_Hashtable(_Hashtable&&, const allocator_type&)): Add noexcept
3680         qualification.
3681         * include/bits/unordered_map.h
3682         (unordered_map(unordered_map&&, const allocator_type&)): Add noexcept
3683         qualification.
3684         (unordered_multimap(unordered_multimap&&, const allocator_type&)):
3685         Likewise.
3686         * include/bits/unordered_set.h
3687         (unordered_set(unordered_set&&, const allocator_type&)): Likewise.
3688         (unordered_multiset(unordered_multiset&&, const allocator_type&)):
3689         Likewise.
3690         * include/debug/unordered_map
3691         (unordered_map(unordered_map&&, const allocator_type&)): Likewise.
3692         (unordered_multimap(unordered_multimap&&, const allocator_type&)):
3693         Likewise.
3694         * include/debug/unordered_set
3695         (unordered_set(unordered_set&&, const allocator_type&)): Likewise.
3696         (unordered_multiset(unordered_multiset&&, const allocator_type&)):
3697         Likewise.
3698         * testsuite/23_containers/unordered_map/allocator/default_init.cc:
3699         New test.
3700         * testsuite/23_containers/unordered_map/cons/noexcept_default_construct.cc:
3701         New test.
3702         * testsuite/23_containers/unordered_map/cons/noexcept_move_construct.cc:
3703         New test.
3704         * testsuite/23_containers/unordered_map/modifiers/move_assign.cc:
3705         New test.
3706         * testsuite/23_containers/unordered_multimap/cons/noexcept_default_construct.cc:
3707         New test.
3708         * testsuite/23_containers/unordered_multimap/cons/noexcept_move_construct.cc:
3709         New test.
3710         * testsuite/23_containers/unordered_multiset/cons/noexcept_default_construct.cc:
3711         New test.
3712         * testsuite/23_containers/unordered_multiset/cons/noexcept_move_construct.cc:
3713         New test.
3714         * testsuite/23_containers/unordered_set/allocator/default_init.cc:
3715         New test.
3716         * testsuite/23_containers/unordered_set/cons/noexcept_default_construct.cc:
3717         New test.
3718         * testsuite/23_containers/unordered_set/cons/noexcept_move_construct.cc:
3719         New test.
3720
3721 2020-07-28  François Dumont  <fdumont@gcc.gnu.org>
3722
3723         * include/bits/hashtable.h
3724         (_Hashtable<>(_InputIterator, _InputIterator, size_t, const _H1&,
3725         const _H2&, const _Hash&, const _Equal&, const _ExtractKey&,
3726         const allocator_type&, true_type)): New.
3727         (_Hashtable<>(_InputIterator, _InputIterator, size_t, const _H1&,
3728         const _H2&, const _Hash&, const _Equal&, const _ExtractKey&,
3729         const allocator_type&, false_type)): New.
3730         (_Hashtable<>(_InputIterator, _InputIterator, size_t, const _H1&,
3731         const _H2&, const _Hash&, const _Equal&, const _ExtractKey&,
3732         const allocator_type&)): Delegate to latters.
3733         (operator=(initializer_list<value_type>)): Rehash if too small.
3734         (_M_insert(_Arg&&, const _NodeGenerator&, true_type)): Remove
3735         size_t len parameter.
3736         * include/bits/hashtable_policy.h (_Insert_base<>::_M_insert_range):
3737         Do not try to get input range distance.
3738         * testsuite/23_containers/unordered_set/cons/bucket_hint.cc: New test.
3739         * testsuite/23_containers/unordered_set/modifiers/insert.cc: New test.
3740
3741 2020-07-27  François Dumont  <fdumont@gcc.gnu.org>
3742
3743         * include/bits/hashtable_policy.h (_Map_base<>::at): Use
3744         _Hashtable<>::find.
3745         (_Hashtable_base<>::_Equal_hash_code<>::_S_node_equals):New.
3746         (_Hashtable_base<>::_M_node_equals): New, use latter.
3747         (_Equality<_Key, _Value, _Alloc, _ExtractKey, _Equal, _H1, _H2, _Hash,
3748         _RehashPolicy, false>::_M_equal): Adapt to use latter.
3749         * include/bits/hashtable.h (_Hashtable<>::_M_update_bbegin): New.
3750         (_Hashtable<>::_M_assign): Use latter.
3751         (_Hashtable<>::_M_move_assign): Likewise.
3752         (_Hashtable<>(_Hashtable<>&&)): Likewise.
3753         (_Hashtable<>(_Hashtable<>&&, const allocator_type&)): Likewise.
3754         (_Hashtable<>::swap): Likewise.
3755         (_Hashtable<>::find): Build iterator directly from _M_find_node result.
3756         (_Hashtable<>::count): Use _Hashtable<>::find.
3757         (_Hashtable<>::equal_range): Likewise.
3758         (_Hashtable<>::_M_erase(false_type, const key_type&)): Use
3759         _M_node_equals.
3760
3761 2020-07-27  Jonathan Wakely  <jwakely@redhat.com>
3762
3763         * src/c++17/floating_from_chars.cc (from_chars_impl): Ensure
3764         that FE_NEAREST is used.
3765         * testsuite/20_util/from_chars/4.cc: Do not use if constexpr in
3766         a { target c++14 } test.
3767         [!_GLIBCXX_HAVE_USELOCALE]: Disable all tests.
3768         * testsuite/20_util/from_chars/5.cc [!_GLIBCXX_HAVE_USELOCALE]:
3769         Likewise.
3770         * testsuite/20_util/from_chars/6.cc: New test.
3771
3772 2020-07-22  Jonathan Wakely  <jwakely@redhat.com>
3773
3774         * include/std/future (future, shared_future, promise): Add
3775         static assertions to the primary template to reject array and
3776         function types.
3777         * testsuite/30_threads/future/requirements/lwg3458.cc: New test.
3778         * testsuite/30_threads/promise/requirements/lwg3466.cc: New test.
3779         * testsuite/30_threads/shared_future/requirements/lwg3458.cc: New test.
3780
3781 2020-07-22  Jonathan Wakely  <jwakely@redhat.com>
3782
3783         * include/bits/stl_iterator.h (reverse_iterator): Constrain
3784         converting constructor and converting assignment operator.
3785         Access source iterator's data member directly instead of
3786         calling base().
3787         (move_iterator): Likewise.
3788         * testsuite/24_iterators/move_iterator/dr3435.cc: New test.
3789         * testsuite/24_iterators/reverse_iterator/dr3435.cc: New test.
3790
3791 2020-07-20  Jonathan Wakely  <jwakely@redhat.com>
3792
3793         * acinclude.m4 (libtool_VERSION): Bump version.
3794         * config.h.in: Regenerate.
3795         * config/abi/pre/gnu.ver: Add GLIBCXX_3.4.29 version and new
3796         exports.
3797         * config/os/gnu-linux/ldbl-extra.ver: Add _GLIBCXX_LDBL_3.4.29
3798         version and new export.
3799         * configure: Regenerate.
3800         * configure.ac: Check for <xlocale.h> and uselocale.
3801         * crossconfig.m4: Add macro or checks for uselocale.
3802         * include/std/charconv (from_chars): Declare overloads for
3803         float, double, and long double.
3804         * src/c++17/Makefile.am: Add new file.
3805         * src/c++17/Makefile.in: Regenerate.
3806         * src/c++17/floating_from_chars.cc: New file.
3807         (from_chars): Define for float, double, and long double.
3808         * testsuite/20_util/from_chars/1_c++20_neg.cc: Prune extra
3809         diagnostics caused by new overloads.
3810         * testsuite/20_util/from_chars/1_neg.cc: Likewise.
3811         * testsuite/20_util/from_chars/2.cc: Check leading '+'.
3812         * testsuite/20_util/from_chars/4.cc: New test.
3813         * testsuite/20_util/from_chars/5.cc: New test.
3814         * testsuite/util/testsuite_abi.cc: Add new symbol versions.
3815
3816 2020-07-20  Jonathan Wakely  <jwakely@redhat.com>
3817
3818         * include/bits/istream.tcc
3819         (basic_istream::get(__streambuf_type&, char_type): Use unsigned
3820         long long for counter and check if it would overflow _M_gcount.
3821         * testsuite/27_io/basic_istream/get/char/lwg3464.cc: New test.
3822         * testsuite/27_io/basic_istream/get/wchar_t/lwg3464.cc: New test.
3823
3824 2020-07-17  Iain Sandoe  <iain@sandoe.co.uk>
3825
3826         * include/std/coroutine: Mark the methods of the
3827         trivial awaitables as constexpr.
3828
3829 2020-07-14  David Edelsohn  <dje.gcc@gmail.com>
3830
3831         * config/os/aix/t-aix: Set BITS from compiler cpp macro.
3832
3833 2020-07-13  Jonathan Wakely  <jwakely@redhat.com>
3834
3835         PR libstdc++/94749
3836         PR libstdc++/96161
3837         * include/bits/istream.tcc (basic_istream::ignore(streamsize))
3838         [n == max]: Check overflow conditions on _M_gcount. Rely on
3839         the fact that either EOF or the delimiter was reached.
3840         [n < max]: Check _M_gcount < n before checking for EOF or
3841         delimiter.
3842         (basic_istream::ignore(streamsize, char_type): Likewise.
3843         * src/c++98/compatibility.cc (istream::ignore(streamsize))
3844         (wistream::ignore(streamsize)): Likewise.
3845         * src/c++98/istream.cc (istream::ignore(streamsize, char_type))
3846         (wistream::ignore(streamsize, char_type)): Likewise.
3847         * testsuite/27_io/basic_istream/ignore/char/94749.cc: Check that
3848         delimiter is discarded if the number of characters ignored
3849         doesn't fit in streamsize.
3850         * testsuite/27_io/basic_istream/ignore/wchar_t/94749.cc:
3851         Likewise.
3852         * testsuite/27_io/basic_istream/ignore/char/96161.cc: New test.
3853         * testsuite/27_io/basic_istream/ignore/wchar_t/96161.cc: New test.
3854
3855 2020-07-08  François Dumont  <fdumont@gcc.gnu.org>
3856
3857         * include/bits/stl_tree.h (_Rb_tree_impl(_Rb_tree_impl&&)): Add noexcept
3858         qualification based only on _Compare one.
3859         * testsuite/23_containers/map/cons/noexcept_move_construct.cc: Add
3860         static asserts.
3861         * testsuite/23_containers/multimap/cons/noexcept_move_construct.cc:
3862         Likewise.
3863         * testsuite/23_containers/multiset/cons/noexcept_move_construct.cc:
3864         Likewise.
3865         * testsuite/23_containers/set/cons/noexcept_move_construct.cc: Likewise.
3866
3867 2020-07-07  Jonathan Wakely  <jwakely@redhat.com>
3868
3869         * include/std/limits: Whitespace changes.
3870
3871 2020-07-07  Jonathan Wakely  <jwakely@redhat.com>
3872
3873         * include/Makefile.am: Remove bits/int_limits.h.
3874         * include/Makefile.in: Regenerate.
3875         * include/bits/int_limits.h: Removed.
3876         * include/bits/parse_numbers.h (_Select_int_base): Replace
3877         __int_limits with __int_traits.
3878         * include/bits/range_access.h (_SSize::operator()): Likewise.
3879         * include/ext/numeric_traits.h (__numeric_traits_integer): Add
3880         static assertion.
3881         (__int_traits): New alias template.
3882         * include/std/bit (__rotl, __rotr, __countl_zero, __countl_one)
3883         (__countr_zero, __countr_one, __popcount, __bit_ceil)
3884         (__bit_floor, __bit_width) Replace __int_limits with
3885         __int_traits.
3886         * include/std/charconv (__to_chars_8, __from_chars_binary)
3887         (__from_chars_alpha_to_num, from_chars): Likewise.
3888         * include/std/memory_resource (polymorphic_allocator::allocate)
3889         (polymorphic_allocator::allocate_object): Likewise.
3890         * include/std/string_view (basic_string_view::_S_compare):
3891         Likewise.
3892         * include/std/utility (cmp_equal, cmp_less, in_range): Likewise.
3893
3894 2020-07-07  Jonathan Wakely  <jwakely@redhat.com>
3895
3896         * include/std/limits: Whitespace changes.
3897
3898 2020-07-06  Jonathan Wakely  <jwakely@redhat.com>
3899
3900         * include/std/optional (_Optional_payload_base, _Optional_base)
3901         (optional, __optional_hash_call_base): Adjust whitespace and
3902         other formatting. Remove redundant && tokens on template
3903         arguments to type traits.
3904
3905 2020-07-06  Jonathan Wakely  <jwakely@redhat.com>
3906
3907         * include/std/optional (make_optional): Add enable_if
3908         constraints and noexcept-specifier to each overload.
3909         * testsuite/20_util/optional/make_optional-2.cc: New test.
3910
3911 2020-07-06  Jonathan Wakely  <jwakely@redhat.com>
3912
3913         PR libstdc++/96036
3914         * include/std/optional (optional): Add noexcept-specifier to
3915         every constructor, assignment operator, emplace function and
3916         dereference operator.
3917         * testsuite/20_util/optional/assignment/noexcept.cc: New test.
3918         * testsuite/20_util/optional/cons/noexcept.cc: New test.
3919
3920 2020-07-06  Jonathan Wakely  <jwakely@redhat.com>
3921
3922         PR libstdc++/96063
3923         * include/bits/fs_dir.h: Use consistent tag in class-head.
3924         * include/bits/localefwd.h: Likewise.
3925         * include/bits/regex.h: Likewise.
3926         * include/bits/stl_map.h: Likewise.
3927         * include/bits/stl_multimap.h: Likewise.
3928         * include/bits/stl_multiset.h: Likewise.
3929         * include/bits/stl_set.h: Likewise.
3930         * include/std/complex: Likewise.
3931         * include/std/functional: Likewise.
3932         * include/std/future: Likewise.
3933         * include/std/system_error: Likewise.
3934         * include/std/thread: Likewise.
3935         * include/std/tuple: Likewise.
3936         * include/std/type_traits: Likewise.
3937         * include/std/valarray: Likewise.
3938
3939 2020-07-02  Jonathan Wakely  <jwakely@redhat.com>
3940
3941         * testsuite/27_io/basic_ios/conv/voidptr.cc: Add c++98_only
3942         target selector.
3943
3944 2020-07-02  Jonathan Wakely  <jwakely@redhat.com>
3945
3946         * testsuite/18_support/headers/cstdalign/std_c++0x_neg.cc: Add
3947         c++98_only target selector.
3948         * testsuite/18_support/headers/cstdbool/std_c++0x_neg.cc:
3949         Likewise.
3950         * testsuite/18_support/headers/cstdint/std_c++0x_neg.cc:
3951         Likewise.
3952         * testsuite/18_support/headers/new/synopsis_cxx98.cc: Likewise.
3953         * testsuite/19_diagnostics/headers/system_error/std_c++0x_neg.cc:
3954         Likewise.
3955         * testsuite/20_util/headers/type_traits/std_c++0x_neg.cc:
3956         Likewise.
3957         * testsuite/23_containers/headers/array/std_c++0x_neg.cc:
3958         Likewise.
3959         * testsuite/23_containers/headers/tuple/std_c++0x_neg.cc:
3960         Likewise.
3961         * testsuite/23_containers/headers/unordered_map/std_c++0x_neg.cc:
3962         Likewise.
3963         * testsuite/23_containers/headers/unordered_set/std_c++0x_neg.cc:
3964         Likewise.
3965         * testsuite/26_numerics/headers/ccomplex/std_c++0x_neg.cc:
3966         Likewise.
3967         * testsuite/26_numerics/headers/cfenv/std_c++0x_neg.cc:
3968         Likewise.
3969         * testsuite/26_numerics/headers/cmath/c99_classification_macros_c++98.cc:
3970         Likewise.
3971         * testsuite/26_numerics/headers/ctgmath/std_c++0x_neg.cc:
3972         Likewise.
3973         * testsuite/26_numerics/headers/random/std_c++0x_neg.cc:
3974         Likewise.
3975         * testsuite/27_io/headers/cinttypes/std_c++0x_neg.cc: Likewise.
3976         * testsuite/28_regex/headers/regex/std_c++0x_neg.cc: Likewise.
3977         * testsuite/29_atomics/headers/atomic/std_c++0x_neg.cc:
3978         Likewise.
3979         * testsuite/30_threads/headers/condition_variable/std_c++0x_neg.cc:
3980         Likewise.
3981         * testsuite/30_threads/headers/future/std_c++0x_neg.cc:
3982         Likewise.
3983         * testsuite/30_threads/headers/mutex/std_c++0x_neg.cc: Likewise.
3984         * testsuite/30_threads/headers/thread/std_c++0x_neg.cc:
3985         Likewise.
3986
3987 2020-07-02  Ville Voutilainen  <ville.voutilainen@gmail.com>
3988
3989         PR libstdc++/91807
3990         * include/std/variant
3991         (_Copy_assign_base::operator=(const _Copy_assign_base&):
3992         Do the move-assignment from a temporary so that the temporary
3993         is constructed with an explicit index.
3994         * testsuite/20_util/variant/91807.cc: New.
3995
3996 2020-07-02  Jonathan Wakely  <jwakely.gcc@gmail.com>
3997
3998         PR libstdc++/91153
3999         PR target/93224
4000         * testsuite/29_atomics/atomic_float/1.cc: Use different values
4001         for tests.
4002         * testsuite/29_atomics/atomic_ref/float.cc: Likewise.
4003
4004 2020-07-01  Jonathan Wakely  <jwakely@redhat.com>
4005
4006         PR libstdc++/94627
4007         * include/bits/regex.h (operator==, operator!=): Remove noexcept
4008         equality comparisons for match_results.
4009         * testsuite/28_regex/match_results/94627.cc: New test.
4010
4011 2020-07-01  Martin Sebor  <msebor@redhat.com>
4012
4013         * testsuite/21_strings/basic_string_view/cons/char/nonnull.cc: Adjust
4014         text of expected warning.
4015         * testsuite/21_strings/basic_string_view/cons/wchar_t/nonnull.cc: Same.
4016         * testsuite/21_strings/basic_string_view/operations/compare/char/nonnull.cc: Same.
4017         * testsuite/21_strings/basic_string_view/operations/find/char/nonnull.cc: Same.
4018         * testsuite/21_strings/basic_string_view/operations/rfind/char/nonnull.cc: Same.
4019
4020 2020-06-29  Ville Voutilainen  <ville.voutilainen@gmail.com>
4021
4022         Revert:
4023         2020-06-28  Ville Voutilainen  <ville.voutilainen@gmail.com>
4024
4025         * include/bits/basic_string.h (string(_CharT*, const _Alloc&)):
4026         Add a __nonnull__ attribute.
4027         * testsuite/21_strings/basic_string/cons/char/nonnull.cc: New.
4028         * testsuite/21_strings/basic_string/cons/wchar_t/nonnull.cc: Likewise.
4029
4030 2020-06-28  Ville Voutilainen  <ville.voutilainen@gmail.com>
4031
4032         * include/bits/basic_string.h (string(_CharT*, const _Alloc&)):
4033         Add a __nonnull__ attribute.
4034         * testsuite/21_strings/basic_string/cons/char/nonnull.cc: New.
4035         * testsuite/21_strings/basic_string/cons/wchar_t/nonnull.cc: Likewise.
4036
4037 2020-06-28  Ville Voutilainen  <ville.voutilainen@gmail.com>
4038
4039         PR libstdc++/95915
4040         * include/std/type_traits (is_literal_type, is_literal_type_v):
4041         Deprecate in C++17.
4042         * include/std/variant (_Uninitialized):
4043         Adjust the condition and the comment.
4044         * testsuite/20_util/is_literal_type/deprecated-1z.cc: New.
4045         * testsuite/20_util/is_literal_type/requirements/explicit_instantiation.cc:
4046         Adjust.
4047         * testsuite/20_util/is_literal_type/requirements/typedefs.cc: Likewise.
4048         * testsuite/20_util/is_literal_type/value.cc: Likewise.
4049         * testsuite/20_util/optional/constexpr/nullopt.cc:
4050         Use __is_literal_type directly.
4051         * testsuite/20_util/optional/nullopt.cc: Likewise.
4052         * testsuite/20_util/variable_templates_for_traits.cc: Adjust.
4053         * testsuite/20_util/variant/95915.cc: New.
4054         * testsuite/20_util/variant/compile.cc: Add new test.
4055         * testsuite/experimental/optional/constexpr/nullopt.cc:
4056         Use __is_literal_type directly.
4057         * testsuite/experimental/optional/nullopt.cc: Likewise.
4058         * testsuite/experimental/type_traits/value.cc: Adjust.
4059         * testsuite/util/testsuite_common_types.h:
4060         Use __is_literal_type directly.
4061
4062 2020-06-24  Jonathan Wakely  <jwakely@redhat.com>
4063
4064         * include/std/charconv (__from_chars_binary): Ignore leading zeros.
4065         * testsuite/20_util/from_chars/1.cc: Check "0x1" for all bases,
4066         not just 10 and 16.
4067         * testsuite/20_util/from_chars/3.cc: New test.
4068
4069 2020-06-24  Jonathan Wakely  <jwakely@redhat.com>
4070
4071         * include/bits/stl_algobase.h (__find_if): Add FALLTHRU markers.
4072         * include/std/charconv (__detail::__to_chars): Avoid
4073         -Wsign-compare warning.
4074
4075 2020-06-24  Jonathan Wakely  <jwakely@redhat.com>
4076
4077         PR libstdc++/95851
4078         * include/std/charconv (__to_chars_i): Check for zero-sized
4079         buffer unconditionally.
4080         * testsuite/20_util/to_chars/95851.cc: New test.
4081
4082 2020-06-23  Jonathan Wakely  <jwakely@redhat.com>
4083
4084         * testsuite/20_util/from_chars/1_c++20_neg.cc: Check enumeration
4085         type.
4086         * testsuite/20_util/from_chars/1_neg.cc: Likewise. Move dg-error
4087         directives outside preprocessor condition.
4088
4089 2020-06-23  Jonathan Wakely  <jwakely@redhat.com>
4090
4091         PR libstdc++/95832
4092         * include/std/variant (__detail::__variant::_Build_FUN): Remove
4093         partial specialization to prevent narrowing conversions to bool.
4094         * testsuite/20_util/variant/compile.cc: Test non-narrowing
4095         conversions to bool.
4096         * testsuite/20_util/variant/run.cc: Likewise.
4097
4098 2020-06-23  Jonathan Wakely  <jwakely@redhat.com>
4099
4100         * doc/Makefile.in: Regenerate.
4101         * include/Makefile.in: Regenerate.
4102         * libsupc++/Makefile.in: Regenerate.
4103         * po/Makefile.in: Regenerate.
4104         * python/Makefile.in: Regenerate.
4105         * src/Makefile.in: Regenerate.
4106         * src/c++11/Makefile.in: Regenerate.
4107         * src/c++17/Makefile.in: Regenerate.
4108         * src/c++98/Makefile.in: Regenerate.
4109         * src/filesystem/Makefile.in: Regenerate.
4110         * testsuite/Makefile.in: Regenerate.
4111
4112 2020-06-22  David Edelsohn  <dje.gcc@gmail.com>
4113
4114         * Makefile.am: Use -include.
4115         * Makefile.in: Regenerate.
4116
4117 2020-06-21  David Edelsohn  <dje.gcc@gmail.com>
4118
4119         * Makefile.am (tmake_file): Build and install AIX-style FAT libraries.
4120         * Makefile.in: Regenerate.
4121         * configure.ac (tmake_file): Substitute.
4122         * configure: Regenerate.
4123         * configure.host (aix*): Define tmake_file.
4124         * config/os/aix/t-aix: New file.
4125
4126 2020-06-20  Jason Merrill  <jason@redhat.com>
4127
4128         * testsuite/24_iterators/move_iterator/rel_ops_c++20.cc:
4129         Remove greedy_ops tests.
4130         * testsuite/24_iterators/reverse_iterator/rel_ops_c++20.cc:
4131         Remove greedy_ops tests.
4132
4133 2020-06-19  Jonathan Wakely  <jwakely@redhat.com>
4134
4135         PR libstdc++/95765
4136         * include/bits/stl_algobase.h (__size_to_integer(float))
4137         (__size_to_integer(double), __size_to_integer(long double))
4138         (__size_to_integer(__float128)): Cast return type explicitly.
4139         * include/bits/stl_uninitialized.h (__uninitialized_default_1<true>):
4140         Remove unused typedef.
4141
4142 2020-06-19  Jonathan Wakely  <jwakely@redhat.com>
4143
4144         * include/bits/stl_pair.h (_Index_tuple): Remove redundant
4145         namespace qualification.
4146         (pair::pair(tuple<>&, tuple<>&, _Index_tuple, _Index_tuple)):
4147         Likewise.
4148         * include/std/tuple (_Head_base, _Tuple_impl, tuple_size)
4149         (tuple_element, __get_helper, get, __make_tuple_impl)
4150         (__make_1st_indices, __tuple_concater)
4151         (pair::pair(tuple<>&, tuple<>&, _Index_tuple, _Index_tuple)):
4152         Likewise.
4153         * include/std/utility (tuple_element, __is_tuple_like_impl)
4154         (tuple_size, __pair_get, get): Likewise.
4155
4156 2020-06-19  Jonathan Wakely  <jwakely@redhat.com>
4157
4158         * include/bits/std_function.h (function): Define all member
4159         functions inline.
4160
4161 2020-06-19  Marc Glisse  <marc.glisse@inria.fr>
4162
4163         * include/bits/stl_algo.h (__includes): Simplify the code.
4164
4165 2020-06-19  Marc Glisse  <marc.glisse@inria.fr>
4166
4167         * include/std/optional (optional()): Explicitly define it.
4168
4169 2020-06-17  Jonathan Wakely  <jwakely@redhat.com>
4170
4171         PR libstdc++/94540
4172         * include/bits/stl_uninitialized.h (__uninitialized_default_1<true>):
4173         Construct the first value at *__first instead of on the stack.
4174         (__uninitialized_default_n_1<true>): Likewise.
4175         Improve comments on several of the non-standard algorithms.
4176         * testsuite/20_util/specialized_algorithms/uninitialized_default/94540.cc:
4177         New test.
4178         * testsuite/20_util/specialized_algorithms/uninitialized_default_n/94540.cc:
4179         New test.
4180         * testsuite/20_util/specialized_algorithms/uninitialized_value_construct/94540.cc:
4181         New test.
4182         * testsuite/20_util/specialized_algorithms/uninitialized_value_construct_n/94540.cc:
4183         New test.
4184         * testsuite/23_containers/vector/cons/94540.cc: New test.
4185
4186 2020-06-17  Jonathan Wakely  <jwakely@redhat.com>
4187
4188         * testsuite/20_util/specialized_algorithms/uninitialized_default_n/sizes.cc:
4189         Replace Value type with int so trivial code path is used.
4190         * testsuite/20_util/specialized_algorithms/uninitialized_value_construct_n/sizes.cc:
4191         Likewise.
4192
4193 2020-06-17  Jonathan Wakely  <jwakely@redhat.com>
4194
4195         * include/bits/stl_uninitialized.h (uninitialized_fill_n): Only
4196         use std::fill_n when the size is an integral type.
4197         (__uninitialized_default_n): Likewise.
4198         * testsuite/20_util/specialized_algorithms/uninitialized_default_n/sizes.cc:
4199         New test.
4200         * testsuite/20_util/specialized_algorithms/uninitialized_fill_n/sizes.cc:
4201         New test.
4202         * testsuite/20_util/specialized_algorithms/uninitialized_value_construct_n/sizes.cc:
4203         New test.
4204
4205 2020-06-16  Jonathan Wakely  <jwakely@redhat.com>
4206
4207         PR libstdc++/95282
4208         * include/bits/atomic_base.h (__atomic_impl::load): Use the _Val
4209         alias instead of deducing _Tp as an unqualified type.
4210         (__atomic_impl::exchange): Use the _Val alias to remove volatile
4211         from the reinterpret_cast result type.
4212
4213 2020-06-16  Jonathan Wakely  <jwakely@redhat.com>
4214
4215         * include/std/atomic (atomic): Add static assertions.
4216         * testsuite/29_atomics/atomic/requirements/types_neg.cc: New test.
4217
4218 2020-06-16  Patrick Palka  <ppalka@redhat.com>
4219
4220         PR libstdc++/94003
4221         * testsuite/20_util/is_constructible/94003.cc: New test.
4222
4223 2020-06-15  Jonathan Wakely  <jwakely@redhat.com>
4224
4225         * include/bits/char_traits.h (__cpp_lib_constexpr_char_traits):
4226         Update value for C++20.
4227         * include/std/version (__cpp_lib_constexpr_char_traits): Likewise.
4228         * testsuite/21_strings/char_traits/requirements/constexpr_functions_c++17.cc:
4229         Update expected value.
4230         * testsuite/21_strings/char_traits/requirements/constexpr_functions_c++20.cc:
4231         Likewise.
4232
4233 2020-06-15  Paul Keir  <paul.keir@uws.ac.uk>
4234
4235         * include/bits/char_traits.h (char_traits::move): constexpr move with
4236         overlap was using copy_backward incorrectly.
4237         * testsuite/21_strings/char_traits/requirements/constexpr_functions_c++20.cc:
4238         New test.
4239
4240 2020-06-12  Jonathan Wakely  <jwakely@redhat.com>
4241
4242         * testsuite/29_atomics/atomic_flag/clear/1.cc: Also test clear()
4243         when the value is currently set.
4244         * testsuite/29_atomics/atomic_flag/test_and_set/explicit.cc:
4245         Actually check the return value.
4246         * testsuite/29_atomics/atomic_flag/test_and_set/implicit.cc:
4247         Likewise.
4248
4249 2020-06-12  Jonathan Wakely  <jwakely@redhat.com>
4250
4251         * include/bits/atomic_base.h (atomic_flag::test): Add missing
4252         const qualifiers.
4253         * testsuite/29_atomics/atomic_flag/test/explicit.cc: Add
4254         dg-options and verify results of test function.
4255         * testsuite/29_atomics/atomic_flag/test/implicit.cc: Likewise.
4256
4257 2020-06-11  Jonathan Wakely  <jwakely@redhat.com>
4258
4259         PR libstdc++/94749
4260         * include/bits/istream.tcc (basic_istream::ignore(streamsize, CharT)):
4261         Only discard an extra character if we didn't already reach the
4262         maximum number.
4263         * src/c++98/istream.cc (istream::ignore(streamsiz, char))
4264         (wistream::ignore(streamsize, wchar_t)): Likewise.
4265         * testsuite/27_io/basic_istream/ignore/char/94749.cc: New test.
4266         * testsuite/27_io/basic_istream/ignore/wchar_t/94749.cc: New test.
4267
4268 2020-06-10  Patrick Palka  <ppalka@redhat.com>
4269
4270         PR libstdc++/95578
4271         * include/bits/ranges_algo.h (__lexicographical_compare_fn):
4272         Also check that the iterator and sentinel have the same type before
4273         applying the unwrapping optimization for __normal_iterator.
4274         Split the check into two, one for the first iterator/sentinel
4275         pair and another for second iterator/sentinel pair.  Remove uses
4276         of __niter_base, and remove uses of std::move on a
4277         __normal_iterator.
4278         * include/bits/ranges_algobase.h (__equal_fn): Likewise.
4279         (__copy_or_move): Likewise.  Perform similar adjustments for
4280         the reverse_iterator and move_iterator optimizations.  Inline
4281         the checks into the if-constexprs, and use using-declarations to
4282         make them less visually noisy.  Remove uses of __niter_wrap.
4283         (__copy_or_move_backward): Likewise.
4284         * testsuite/25_algorithms/copy/95578.cc: New test.
4285         * testsuite/25_algorithms/copy_backward/95578.cc: New test.
4286         * testsuite/25_algorithms/equal/95578.cc: New test.
4287         * testsuite/25_algorithms/lexicographical_compare/95578.cc: New test.
4288         * testsuite/25_algorithms/move/95578.cc: New test.
4289         * testsuite/25_algorithms/move_backward/95578.cc: New test.
4290
4291 2020-06-10  François Dumont  <fdumont@gcc.gnu.org>
4292             Jonathan Wakely  <jwakely@redhat.com>
4293
4294         * include/bits/deque.tcc (__lex_cmp_dit): New.
4295         (__lexicographical_compare_aux1): Define overloads for deque
4296         iterators.
4297         * include/bits/stl_algobase.h (__lexicographical_compare::__3way):
4298         New static member function.
4299         (__lexicographical_compare<true>::__3way): Likewise.
4300         (__lexicographical_compare<true>::__lc): Use __3way.
4301         (__lexicographical_compare_aux): Rename to
4302         __lexicographical_compare_aux1 and declare overloads for deque
4303         iterators.
4304         (__lexicographical_compare_aux): Define new forwarding function
4305         that calls __lexicographical_compare_aux1 and declare new overloads
4306         for safe iterators.
4307         (lexicographical_compare): Do not use __niter_base on
4308         parameters.
4309         * include/debug/safe_iterator.tcc
4310         (__lexicographical_compare_aux): Define overloads for safe
4311         iterators.
4312         * testsuite/25_algorithms/lexicographical_compare/1.cc: Add
4313         checks with random access iterators.
4314         * testsuite/25_algorithms/lexicographical_compare/deque_iterators/1.cc:
4315         New test.
4316
4317 2020-06-09  Jonathan Wakely  <jwakely@redhat.com>
4318
4319         * include/bits/stl_iterator.h (move_iterator::operator=): Define.
4320         * testsuite/24_iterators/move_iterator/dr3265.cc: New test.
4321
4322 2020-06-09  Jonathan Wakely  <jwakely@redhat.com>
4323
4324         * include/std/optional (bad_optional_access): Define default
4325         constructor and destructor as defaulted.
4326         * testsuite/20_util/optional/bad_access.cc: New test.
4327
4328 2020-06-08  Jonathan Wakely  <jwakely@redhat.com>
4329
4330         * testsuite/20_util/default_delete/48631_neg.cc: Adjust dg-error
4331         line number.
4332         * testsuite/20_util/default_delete/void_neg.cc: Likewise.
4333
4334 2020-06-08  Jonathan Wakely  <jwakely@redhat.com>
4335
4336         * include/bits/unique_ptr.h (operator<<): Define for C++20.
4337         * testsuite/20_util/unique_ptr/io/lwg2948.cc: New test.
4338
4339 2020-06-04  Jonathan Wakely  <jwakely@redhat.com>
4340
4341         * include/bits/iterator_concepts.h (__detail::__ptr, __detail::__ref)
4342         (__detail::__cat, __detail::__diff): Move to class scope in the
4343         relevant __iterator_traits specializations.
4344         (__iterator_traits<>): Use nested class templates instead of ones from
4345         namespace __detail.
4346         * include/bits/stl_iterator.h (__detail::__common_iter_ptr): Move to
4347         class scope in iterator_traits<common_iterator<I, S>>.
4348         (iterator_traits<common_iterator<I, S>>): Use nested class template
4349         instead of __detail::__common_iter_ptr.
4350
4351 2020-06-04  François Dumont  <fdumont@gcc.gnu.org>
4352
4353         * include/bits/stl_algo.h (__copy_n_a): Move to ...
4354         * include/bits/stl_algobase.h (__copy_n_a): ...here. Add __strict
4355         parameter.
4356         (__copy_n_a(istreambuf_iterator<>, _Size, _Deque_iterator<>, bool)):
4357         Declare.
4358         (__niter_base(const _Safe_iterator<_Ite, _Seq,
4359         random_access_iterator_tag>&)): Declare.
4360         (__copy_move_a2(istreambuf_iterator<>, istreambuf_iterator<>,
4361         _Deque_iterator<>)): Declare.
4362         * include/bits/deque.tcc
4363         (__copy_move_a2(istreambuf_iterator<>, istreambuf_iterator<>,
4364         _Deque_iterator<>)): New.
4365         (__copy_n_a(istreambuf_iterator<>, _Size, _Deque_iterator<>, bool)):
4366         New.
4367         * include/bits/streambuf_iterator.h
4368         (__copy_n_a(istreambuf_iterator<>, _Size, _CharT*, bool)): Adapt.
4369         * include/debug/safe_iterator.tcc (__niter_base): New.
4370         * testsuite/25_algorithms/copy/streambuf_iterators/char/4.cc
4371         (test03): New.
4372         * testsuite/25_algorithms/copy/streambuf_iterators/char/debug/deque_neg.cc:
4373         New test.
4374         * testsuite/25_algorithms/copy_n/debug/istreambuf_ite_deque_neg.cc:
4375         New test.
4376         * testsuite/25_algorithms/copy_n/istreambuf_iterator/2.cc: New test.
4377         * testsuite/25_algorithms/copy_n/istreambuf_iterator/deque.cc:
4378         New test.
4379
4380 2020-06-04  Jonathan Wakely  <jwakely@redhat.com>
4381
4382         * include/bits/ranges_algobase.h (__copy_n_fn): Only call
4383         ranges::copy for positive values.
4384         * include/bits/stl_algo.h (copy_n): Convert Size argument to an
4385         integral type and only call __copy_n for positive values.
4386         * testsuite/util/testsuite_iterators.h
4387         (random_access_iterator_wrapper::operator+=): Fix range check for
4388         negative values.
4389         (output_container, input_container, forward_container)
4390         (bidirectional_container, random_access_container): New alias
4391         templates.
4392         * testsuite/25_algorithms/copy_n/5.cc: New test.
4393
4394 2020-06-02  Jonathan Wakely  <jwakely@redhat.com>
4395
4396         PR libstdc++/90102
4397         * include/debug/deque (deque(const _Base&)): Replace parameter
4398         with a struct that wraps a const _Base&.
4399         * include/debug/forward_list (forward_list(_Base_ref)): New
4400         constructor.
4401         * include/debug/list (list(const _Base&)): Replace parameter
4402         with a struct that wraps a const _Base&.
4403         * include/debug/map.h (map(const _Base&)): Likewise.
4404         * include/debug/multimap.h (multimap(const _Base&)): Likewise.
4405         * include/debug/multiset.h (multiset(const _Base&)): Likewise.
4406         * include/debug/set.h (set(const _Base&)): Likewise.
4407         * include/debug/unordered_map (unordered_map(const _Base&))
4408         (unordered_multimap(const _Base&)): Likewise.
4409         * include/debug/unordered_set (unordered_set(const _Base&))
4410         (unordered_multiset(const _Base&)): Likewise.
4411         * testsuite/23_containers/vector/cons/destructible_debug_neg.cc:
4412         Adjust dg-error line number.
4413         * include/debug/vector (vector(const _Base&)): Likewise.
4414         * testsuite/23_containers/deque/debug/90102.cc: New test.
4415         * testsuite/23_containers/forward_list/debug/90102.cc: New test.
4416         * testsuite/23_containers/list/debug/90102.cc: New test.
4417         * testsuite/23_containers/map/debug/90102.cc: New test.
4418         * testsuite/23_containers/multimap/debug/90102.cc: New test.
4419         * testsuite/23_containers/multiset/debug/90102.cc: New test.
4420         * testsuite/23_containers/set/debug/90102.cc: New test.
4421         * testsuite/23_containers/unordered_map/debug/90102.cc: New test.
4422         * testsuite/23_containers/unordered_multimap/debug/90102.cc: New test.
4423         * testsuite/23_containers/unordered_multiset/debug/90102.cc: New test.
4424         * testsuite/23_containers/unordered_set/debug/90102.cc: New test.
4425         * testsuite/23_containers/vector/debug/90102.cc: New test.
4426
4427 2020-06-01  Jonathan Wakely  <jwakely@redhat.com>
4428
4429         PR libstdc++/95392
4430         * include/bits/fs_path.h (path::_S_to_string): Move to
4431         namespace-scope and rename to ...
4432         (__detail::__string_from_range): ... this.
4433         [WINDOWS] (__detail::__wstr_from_utf8): New function template to
4434         convert a char sequence containing UTF-8 to wstring.
4435         (path::_S_convert(Iter, Iter)): Adjust call to _S_to_string.
4436         (path::_S_convert_loc(Iter, Iter, const locale&)): Likewise.
4437         (u8path(InputIterator, InputIterator)) [WINDOWS]: Use
4438         __string_from_range to obtain a contiguous range and
4439         __wstr_from_utf8 to obtain a wide string.
4440         (u8path(const Source&)) [WINDOWS]: Use __effective_range to
4441         obtain a contiguous range and __wstr_from_utf8 to obtain a wide
4442         string.
4443         (path::_S_convert(const _EcharT*, const _EcharT)) [WINDOWS]:
4444         Use __wstr_from_utf8.
4445
4446 2020-06-01  Jonathan Wakely  <jwakely@redhat.com>
4447
4448         * testsuite/util/testsuite_iterators.h:
4449         (input_iterator_wrapper::operator++(int)): Return proxy object.
4450
4451 2020-06-01  Jonathan Wakely  <jwakely@redhat.com>
4452
4453         * doc/xml/manual/evolution.xml: Document deprecation of
4454         __is_nullptr_t and removal of std::allocator members.
4455         * doc/html/manual/api.html: Regenerate.
4456
4457 2020-06-01  Jonathan Wakely  <jwakely@redhat.com>
4458
4459         * doc/xml/manual/containers.xml: Replace <xref> with <link>.
4460         * doc/xml/manual/evolution.xml: Likewise.
4461         * doc/html/manual/api.html: Regenerate.
4462         * doc/html/manual/containers.html: Regenerate.
4463
4464 2020-06-01  Gerald Pfeifer  <gerald@pfeifer.com>
4465
4466         * doc/xml/faq.xml: Adjust Valgrind reference and remove another.
4467         * doc/html/faq.html: Regenerate.
4468
4469 2020-06-01  Gerald Pfeifer  <gerald@pfeifer.com>
4470
4471         * doc/xml/manual/policy_data_structures_biblio.xml: Remove
4472         stray change.
4473
4474 2020-06-01  Gerald Pfeifer  <gerald@pfeifer.com>
4475
4476         * doc/xml/manual/policy_data_structures_biblio.xml: Switch
4477         www.cs.princeton.edu to https.
4478         * doc/html/manual/policy_data_structures.html: Regenerate.
4479
4480 2020-05-31  Douglas B Rupp  <douglas.b.rupp@gmail.com>
4481
4482         * crossconfig.m4 (<*-vxworks>): Check for more math decls.
4483         * configure: Rebuild.
4484
4485 2020-05-29  H.J. Lu  <hjl.tools@gmail.com>
4486
4487         PR bootstrap/95413
4488         * configure: Regenerated.
4489
4490 2020-05-29  François Dumont  <fdumont@gcc.gnu.org>
4491
4492         PR libstdc++/95079
4493         * include/bits/hashtable_policy.h (_Insert_base<>::try_emplace): New.
4494         * include/bits/unordered_map.h (unordered_map<>::try_emplace): Adapt.
4495         (unordered_map<>::insert_or_assign): Adapt.
4496
4497 2020-05-27  Jonathan Wakely  <jwakely@redhat.com>
4498
4499         PR libstdc++/95282
4500         * include/bits/atomic_base.h (__atomic_impl::load): Add
4501         cv-qualifiers to parameter so that _Tp is deduced as the
4502         unqualified type.
4503         * testsuite/29_atomics/atomic_float/95282.cc: New test.
4504
4505 2020-05-27  Jonathan Wakely  <jwakely@redhat.com>
4506
4507         PR libstdc++/95322
4508         * include/std/ranges (transform_view::_Sentinel): Allow hidden
4509         friends to work with _Iterator<true> and _Iterator<false>.
4510         (join_view::_Sentinel): Likewise.
4511         * testsuite/std/ranges/adaptors/95322.cc: New test.
4512
4513 2020-05-27  Jonathan Wakely  <jwakely@redhat.com>
4514
4515         PR libstdc++/94354
4516         * include/bits/stl_iterator.h (reverse_iterator): Fix comparison
4517         operators to use the correct operations on the underlying
4518         iterators.
4519         * testsuite/24_iterators/reverse_iterator/rel_ops.cc: New test.
4520
4521 2020-05-27  Jonathan Wakely  <jwakely@redhat.com>
4522
4523         * testsuite/18_support/comparisons/categories/zero_neg.cc: New test.
4524
4525 2020-05-26  Patrick Palka  <ppalka@redhat.com>
4526
4527         PR libstdc++/95322
4528         * include/bits/stl_iterator.h (__detail::_Common_iter_proxy):
4529         Remove and instead define it ...
4530         (common_iterator::_Proxy): ... here.
4531         (common_iterator::operator->): Use it.
4532         * testsuite/24_iterators/common_iterator/2.cc: New test.
4533         * testsuite/std/ranges/adaptors/95322.cc: New test.
4534
4535 2020-05-23  Patrick Palka  <ppalka@redhat.com>
4536
4537         PR libstdc++/93978
4538         * testsuite/std/ranges/adaptors/93978.cc: Add -Wall to
4539         dg-additional-options.  Avoid unused-but-set-variable warning.
4540
4541 2020-05-23  Jonathan Wakely  <jwakely@redhat.com>
4542
4543         PR libstdc++/95289
4544         * include/debug/helper_functions.h (__get_distance): Only declare
4545         as a constexpr function for C++14 and up.
4546         * testsuite/25_algorithms/copy/debug/95289.cc: New test.
4547
4548         * include/bits/fs_path.h (__detail::_S_range_begin)
4549         (__detail::_S_range_end, path::_S_string_from_iter): Replace with
4550         overloaded function template __detail::__effective_range.
4551         (__detail::__effective_range): New overloaded function template to
4552         create a basic_string or basic_string_view for an effective range.
4553         (__detail::__value_type_is_char): Use __detail::__effective_range.
4554         Do not use remove_const on value type.
4555         (__detail::__value_type_is_char_or_char8_t): Likewise.
4556         (path::path(const Source&, format))
4557         (path::path(const Source&, const locale&))
4558         (path::operator/=(const Source&), path::append(const Source&))
4559         (path::concat(const Source&)): Use __detail::__effective_range.
4560         (path::_S_to_string(InputIterator, InputIterator)): New function
4561         template to create a string view if possible, or string otherwise.
4562         (path::_S_convert): Add overloads that convert a string returned
4563         by __detail::__effective_range. Use if-constexpr to inline conversion
4564         logic from all overloads of _Cvt::_S_convert.
4565         (path::_S_convert_loc): Add overload that converts a string. Use
4566         _S_to_string to avoid allocation when possible.
4567         (path::_Cvt): Remove.
4568         (path::operator+=(CharT)): Remove indirection through path::concat.
4569         * include/experimental/bits/fs_path.h (path::_S_convert_loc): Add
4570         overload for non-const pointers, to avoid constructing a std::string.
4571         * src/c++17/fs_path.cc (path::_S_convert_loc): Replace conditional
4572         compilation with call to _S_convert.
4573
4574         * include/bits/fs_path.h (__detail::_S_range_begin)
4575         (__detail::_S_range_end): Remove unintentional static specifiers.
4576         * include/experimental/bits/fs_path.h (__detail::_S_range_begin)
4577         (__detail::_S_range_end): Likewise.
4578
4579         * include/bits/fs_path.h (filesystem::__detail::__is_encoded_char):
4580         Replace alias template with variable template. Don't remove const.
4581         (filesystem::__detail::__is_path_src): Replace overloaded function
4582         template with variable template and specializations.
4583         (filesystem::__detail::__is_path_iter_src): Replace alias template
4584         with class template.
4585         (filesystem::__detail::_Path): Use __is_path_src. Remove support for
4586         iterator pairs.
4587         (filesystem::__detail::_Path2): New alias template for checking
4588         InputIterator requirements.
4589         (filesystem::__detail::__constructible_from): Remove.
4590         (filesystem::path): Replace _Path<Iter, Iter> with _Path2<Iter>.
4591         * testsuite/27_io/filesystem/path/construct/80762.cc: Check with two
4592         constructor arguments of void and void* types.
4593
4594 2020-05-21  Matthias Kretz  <kretz@kde.org>
4595
4596         * testsuite/Makefile.am: Remove dup target_triplet and set tool,
4597         allowing runtest to work without arguments.
4598         * testsuite/Makefile.in: Regenerate.
4599
4600 2020-05-21  Jonathan Wakely  <jwakely@redhat.com>
4601
4602         PR libstdc++/93983
4603         * include/bits/iterator_concepts.h (__detail::__cpp17_iterator):
4604         Reorder constraints to avoid recursion when constructors use
4605         iterator_traits (LWG 3420).
4606         * testsuite/24_iterators/customization_points/lwg3420.cc: New test.
4607
4608         * include/experimental/socket (basic_socket::is_open()
4609         (basic_socket_acceptor::is_open()): Use _GLIBCXX_NODISCARD macro.
4610
4611         * include/experimental/bits/net.h (__endpoint, __protocol)
4612         (__acceptable_protocol, __inet_protocol): New concepts.
4613         (__detail::__is_endpoint): Move trait from <experimental/socket>.
4614         (__is_protocol, __is_acceptable_protocol, __is_inet_protocol): New
4615         traits.
4616         (__endpoint, __protocol, __acceptable_protocol): New variable
4617         templates.
4618         * include/experimental/socket (__is_endpoint): Move to net.h header.
4619         (basic_socket, basic_socket_acceptor): Check requirements.
4620
4621         * include/experimental/executor (use_future_t::use_future_t()): Fix
4622         incorrect noexcept-specifier.
4623         * include/experimental/internet (basic_resolver_results): Adjust
4624         whitespace.
4625         * include/experimental/socket (__basic_socket_impl::release): Add
4626         member function.
4627         (basic_socket(io_context&, const endpoint_type&)): Fix argument to
4628         target constructor.
4629         (basic_socket::release(), basic_socket::release(error_code&)): Add
4630         missing member functions.
4631         (basic_socket::is_open()): Add nodiscard attribute.
4632         (basic_socket::close(error_code&)): Pass argument to base function.
4633         (basic_socket_acceptor::release())
4634         (basic_socket_acceptor::release(error_code&)): Add missing member
4635         functions.
4636         (basic_socket_acceptor::is_open()): Add nodiscard attribute.
4637         (basic_socket_streambuf::error()): Add noexcept.
4638         (basic_socket_iostream::error()): Likewise.
4639         * testsuite/experimental/net/socket/basic_socket.cc: New test.
4640
4641         * include/experimental/buffer: Replace typedefs with
4642         alias-declarations.
4643         * include/experimental/executor: Likewise.
4644         * include/experimental/internet: Likewise.
4645         * include/experimental/socket: Likewise.
4646         * include/experimental/timer: Likewise.
4647
4648 2020-05-19  Jonathan Wakely  <jwakely@redhat.com>
4649
4650         PR libstdc++/94087
4651         * src/c++11/random.cc (__x86_rdseed): Allow fallback function to be
4652         passed in.
4653         (__x86_rdseed_rdrand): New function that uses rdseed with rdrand
4654         fallback.
4655         (random_device::_M_init): Use __x86_rdseed_rdrand when both
4656         instructions are available.
4657         * testsuite/26_numerics/random/random_device/94087.cc: New test.
4658
4659 2020-05-19  Patrick Palka  <ppalka@redhat.com>
4660
4661         PR c++/66439
4662         * testsuite/20_util/pair/astuple/get_neg.cc: Prune "type/value
4663         mismatch" messages.
4664         * testsuite/20_util/tuple/element_access/get_neg.cc: Likewise.
4665
4666 2020-05-15  H.J. Lu  <hongjiu.lu@intel.com>
4667
4668         PR bootstrap/95147
4669         * configure: Regenerated.
4670
4671 2020-05-14  H.J. Lu  <hongjiu.lu@intel.com>
4672
4673         * configure: Regenerated.
4674
4675 2020-05-13  Alexandre Oliva <oliva@adacore.com>
4676
4677         PR libstdc++/77691
4678         * include/experimental/memory_resource
4679         (__resource_adaptor_imp::do_allocate): Handle max_align_t on
4680         x86-vxworks as on x86-solaris.
4681         (__resource_adaptor_imp::do_deallocate): Likewise.
4682         * testsuite/experimental/memory_resource/new_delete_resource.cc:
4683         Drop xfail.
4684         (BAD_MAX_ALIGN_T): Define on x86-vxworks as on x86-solaris.
4685         (test03): Drop max-align test for char-aligned alloc.
4686
4687 2020-05-08  Ulrich Drepper  <drepper@redhat.com>
4688
4689         * include/bits/atomic_base.h (atomic_flag): Implement test member
4690         function.
4691         * include/std/version: Define __cpp_lib_atomic_flag_test.
4692         * testsuite/29_atomics/atomic_flag/test/explicit.cc: New file.
4693         * testsuite/29_atomics/atomic_flag/test/implicit.cc: New file.
4694
4695 2020-05-07  Jonathan Wakely  <jwakely@redhat.com>
4696
4697         PR libstdc++/94971 (partial)
4698         * include/bits/ranges_algo.h (ranges::__sample_fn): Qualify
4699         std::sample using macro to work in parallel mode.
4700         (__sort_fn): Likewise for std::sort.
4701         (ranges::__nth_element_fn): Likewise for std::nth_element.
4702         * include/bits/stl_algobase.h (lexicographical_compare_three_way):
4703         Likewise for std::__min_cmp.
4704         * include/parallel/algobase.h (lexicographical_compare_three_way):
4705         Add to namespace std::__parallel.
4706
4707         PR c/92472
4708         * include/parallel/multiway_merge.h (_GuardedIterator::operator*)
4709         (_GuardedIterator::operator _RAIter, _UnguardedIterator::operator*)
4710         (_UnguardedIterator::operator _RAIter): Add const qualifier.
4711         (operator<(_GuardedIterator&, _GuardedIterator&)
4712         (operator<=(_GuardedIterator&, _GuardedIterator&)
4713         (operator<(_UnguardedIterator&, _UnguardedIterator&)
4714         (operator<=(_UnguardedIterator&, _UnguardedIterator&): Change
4715         parameters to const references.
4716
4717 2020-05-07  Eric Botcazou  <ebotcazou@adacore.com>
4718
4719         * config/abi/post/sparc64-linux-gnu/baseline_symbols.txt: Update.
4720         * config/abi/post/sparc64-linux-gnu/32/baseline_symbols.txt: Likewise.
4721
4722 2020-05-06  François Dumont  <fdumont@gcc.gnu.org>
4723
4724         * include/bits/stl_algobase.h (struct _Bit_iterator): New declaration.
4725         (std::__fill_a1(_Bit_iterator, _Bit_iterator, const bool&)): Likewise.
4726         * include/bits/stl_bvector.h (__fill_bvector): Move outside
4727         _GLIBCXX_STD_C namespace.
4728         (fill(_Bit_iterator, _Bit_iterator, const bool&)): Likewise and rename
4729         into...
4730         (__fill_a1): ...this.
4731         * testsuite/25_algorithms/fill/bvector/1.cc: New.
4732
4733 2020-05-06  H.J. Lu  <hongjiu.lu@intel.com>
4734
4735         * config/abi/post/x86_64-linux-gnu/x32/baseline_symbols.txt: Updated.
4736
4737 2020-05-06  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
4738
4739         * config/abi/post/i386-solaris/baseline_symbols.txt: Regenerate.
4740         * config/abi/post/i386-solaris/amd64/baseline_symbols.txt:
4741         Likewise.
4742         * config/abi/post/sparc-solaris/baseline_symbols.txt: Likewise.
4743         * config/abi/post/sparc-solaris/sparcv9/baseline_symbols.txt:
4744         Likewise.
4745
4746 2020-05-06  Martin Liska  <mliska@suse.cz>
4747
4748         Revert:
4749         2020-05-05  Martin Liska  <mliska@suse.cz>
4750         PR c/92472
4751         * include/parallel/multiway_merge.h:
4752         Use const for _Compare template argument.
4753
4754 2020-05-06  Jonathan Wakely  <jwakely@redhat.com>
4755
4756         * doc/xml/manual/abi.xml (abi.versioning.history): Document library
4757         versions for GCC 9.[123] and 10.1 releases.
4758         * doc/html/*: Regenerate.
4759
4760 2020-05-06  Jakub Jelinek  <jakub@redhat.com>
4761
4762         * config/abi/post/x86_64-linux-gnu/baseline_symbols.txt: Update.
4763         * config/abi/post/x86_64-linux-gnu/32/baseline_symbols.txt: Update.
4764         * config/abi/post/i386-linux-gnu/baseline_symbols.txt: Update.
4765         * config/abi/post/i486-linux-gnu/baseline_symbols.txt: Update.
4766         * config/abi/post/aarch64-linux-gnu/baseline_symbols.txt: Update.
4767         * config/abi/post/s390x-linux-gnu/baseline_symbols.txt: Update.
4768         * config/abi/post/powerpc64-linux-gnu/baseline_symbols.txt: Update.
4769
4770 2020-05-05  Martin Liska  <mliska@suse.cz>
4771
4772         PR c/92472
4773         * include/parallel/multiway_merge.h:
4774         Use const for _Compare template argument.
4775
4776 2020-05-04  Fangrui Song  <maskray@google.com>
4777
4778         * libsupc++/cxxabi.h (__cxa_finalize): Fix return type.
4779
4780 2020-05-04  Jonathan Wakely  <jwakely@redhat.com>
4781
4782         * doc/xml/faq.xml: Use working link for SGI STL FAQ.
4783         * doc/html/*: Regenerate.
4784
4785         PR libstdc++/94906
4786         * src/c++17/memory_resource.cc
4787         (monotonic_buffer_resource::_Chunk::release): Use size_t for shift
4788         operands.
4789
4790 2020-05-04  Nathan Sidwell  <nathan@acm.org>
4791
4792         PR libstdc++/94747
4793         * libsupc++/dyncast.cc (__dynamic_cast): Cast offsetof to
4794         ptrdiff_t before negation, to show intent more clearly.
4795
4796 2020-05-04  Jonathan Wakely  <jwakely@redhat.com>
4797
4798         PR libstdc++/94936
4799         * src/c++17/memory_resource.cc (synchronized_pool_resource::_TPools):
4800         Add comment about single-threaded behaviour.
4801         (synchronized_pool_resource::_TPools::move_nonempty_chunks()): Hoist
4802         class member access out of loop.
4803         (synchronized_pool_resource::synchronized_pool_resource())
4804         (synchronized_pool_resource::~synchronized_pool_resource())
4805         (synchronized_pool_resource::release()): Check __gthread_active_p
4806         before creating and/or deleting the thread-specific data key.
4807         (synchronized_pool_resource::_M_thread_specific_pools()): Adjust
4808         assertions.
4809         (synchronized_pool_resource::do_allocate(size_t, size_t)): Add fast
4810         path for single-threaded case.
4811         (synchronized_pool_resource::do_deallocate(void*, size_t, size_t)):
4812         Likewise. Return if unable to find a pool that owns the allocation.
4813         * testsuite/20_util/synchronized_pool_resource/allocate_single.cc:
4814         New test.
4815         * testsuite/20_util/synchronized_pool_resource/cons_single.cc: New
4816         test.
4817         * testsuite/20_util/synchronized_pool_resource/release_single.cc: New
4818         test.
4819
4820 2020-05-03  Jonathan Wakely  <jwakely@redhat.com>
4821
4822         PR libstdc++/94933
4823         * include/bits/stl_algobase.h (__fill_a1): Make overload for byte types
4824         usable in constant expressions.
4825         * testsuite/25_algorithms/fill_n/constexpr.cc: Test with bytes and
4826         non-scalars.
4827
4828 2020-05-01  Jonathan Wakely  <jwakely@redhat.com>
4829
4830         PR libstdc++/94901
4831         * testsuite/17_intro/badnames.cc: Test values between _E9 and _E24 too.
4832
4833 2020-05-01  Jonathan Wakely  <jwakely@redhat.com>
4834             Patrick Palka  <ppalka@redhat.com>
4835
4836         PR libstdc++/92894
4837         * include/bits/iterator_concepts.h (ranges::__cust_imove::_IMove):
4838         Add trait to determine return type and an alias for it.
4839         (ranges::__cust_imove::_IMove::operator()): Use __result instead of
4840         deduced return type.
4841         (iter_rvalue_reference_t): Use _IMove::__type instead of checking
4842         the result of ranges::iter_move.
4843         (__detail::__indirectly_readable_impl): Use iter_rvalue_reference_t
4844         instead of checking the result of ranges::iter_move.
4845         * testsuite/24_iterators/customization_points/92894.cc: New test.
4846         * testsuite/24_iterators/indirect_callable/92894.cc: New test.
4847
4848 2020-05-01  Jonathan Wakely  <jwakely@redhat.com>
4849
4850         PR libstdc++/94901
4851         * include/std/type_traits (__is_complete_or_unbounded): Replace
4852         BADNAME _T with _Tp.
4853         * testsuite/17_intro/badnames.cc: New test.
4854
4855 2020-04-30  Jonathan Wakely  <jwakely@redhat.com>
4856
4857         PR libstdc++/89510
4858         * include/bits/alloc_traits.h (allocator_traits::_S_construct)
4859         (allocator_traits::_S_destroy)
4860         (allocator_traits<allocator<T>>::construct): Use traits in
4861         noexcept-specifiers.
4862         * include/bits/allocator.h (allocator<void>::construct)
4863         (allocator<void>::destroy): Likewise.
4864         * include/ext/malloc_allocator.h (malloc_allocator::construct)
4865         (malloc_allocator::destroy): Likewise.
4866         * include/ext/new_allocator.h (new_allocator::construct)
4867         (new_allocator::destroy): Likewise.
4868         * testsuite/20_util/allocator/89510.cc: New test.
4869         * testsuite/ext/malloc_allocator/89510.cc: New test.
4870         * testsuite/ext/new_allocator/89510.cc: New test.
4871
4872 2020-04-29  Jonathan Wakely  <jwakely@redhat.com>
4873
4874         PR libstdc++/94854
4875         * include/bits/basic_string.tcc: Update comment about explicit
4876         instantiations.
4877
4878 2020-04-28  Jonathan Wakely  <jwakely@redhat.com>
4879
4880         PR libstdc++/91480
4881         * include/bits/allocator.h (__cpp_lib_allocator_is_always_equal):
4882         Remove non-standard macro.
4883         * include/bits/stl_iterator.h (__cpp_lib_constexpr_iterator): Define
4884         to indicate P1032R1 support.
4885         * include/bits/stl_pair.h (__cpp_lib_constexpr_utility): Likewise.
4886         * include/std/string_view (__cpp_lib_constexpr_string_view): Likewise.
4887         * include/std/tuple (__cpp_lib_constexpr_tuple): Likewise.
4888         * include/std/version (__cpp_lib_allocator_is_always_equal): Remove.
4889         (__cpp_lib_constexpr_iterator, __cpp_lib_constexpr_string_view)
4890         (__cpp_lib_constexpr_tuple, __cpp_lib_constexpr_utility): Define.
4891         * testsuite/20_util/function_objects/constexpr_searcher.cc: Check
4892         feature test macro.
4893         * testsuite/20_util/tuple/cons/constexpr_allocator_arg_t.cc: Likewise.
4894         * testsuite/21_strings/basic_string_view/operations/copy/char/
4895         constexpr.cc: Likewise.
4896         * testsuite/24_iterators/insert_iterator/constexpr.cc: Likewise.
4897
4898         PR libstdc++/94831
4899         * include/bits/alloc_traits.h (_S_construct): Restore placement
4900         new-expression for C++11/14/17 and call std::construct_at directly
4901         for C++20.
4902         * include/bits/stl_construct.h (_Construct): Revert to non-constexpr
4903         function returning void.
4904         * testsuite/20_util/specialized_algorithms/
4905         uninitialized_value_construct/94831.cc: New test.
4906         * testsuite/23_containers/vector/cons/94831.cc: New test.
4907
4908 2020-04-28  Patrick Palka  <ppalka@redhat.com>
4909
4910         LWG 3433 subrange::advance(n) has UB when n < 0
4911         * include/std/ranges (subrange::prev): Fix typo.
4912         (subrange::advance): Handle a negative argument as per the proposed
4913         resolution of LWG 3433.
4914         * testsuite/std/ranges/subrange/lwg3433.cc: New test.
4915
4916 2020-04-28  Jonathan Wakely  <jwakely@redhat.com>
4917             Iain Sandoe  <iain@sandoe.co.uk>
4918
4919         PR c++/94759
4920         * include/std/coroutine: Implement handing for non-
4921         class coroutine return types.
4922
4923 2020-04-24  Jonathan Wakely  <jwakely@redhat.com>
4924
4925         * include/experimental/executor (service_already_exists): Make default
4926         constructor public (LWG 3414).
4927         * testsuite/experimental/net/execution_context/make_service.cc: Check
4928         the service_already_exists can be default constructed.
4929
4930 2020-04-24  Kamlesh Kumar  <kamleshbhalui@gmail.com>
4931             Jonathan Wakely  <jwakely@redhat.com>
4932
4933         PR libstdc++/90415
4934         PR libstdc++/92156
4935         * include/std/any (any): Rename template parameters for consistency
4936         with the standard.
4937         (any::_Decay): Rename to _Decay_if_not_any.
4938         (any::any(T&&):: Remove is_constructible from constraints. Remove
4939         non-standard overload.
4940         (any::any(in_place_type_t<T>, Args&&...))
4941         (any::any(in_place_type_t<T>, initializer_list<U>, Args&&...))
4942         (any::emplace(Args&&...))
4943         (any::emplace(initializer_list<U>, Args&&...)):
4944         Use decay_t instead of _Decay.
4945         * testsuite/20_util/any/cons/90415.cc: New test.
4946         * testsuite/20_util/any/cons/92156.cc: New Test.
4947         * testsuite/20_util/any/misc/any_cast_neg.cc: Make dg-error directives
4948         more robust.
4949         * testsuite/20_util/any/modifiers/92156.cc: New test.
4950
4951 2020-04-23  Jonathan Wakely  <jwakely@redhat.com>
4952
4953         * doc/xml/manual/status_cxx2020.xml: Update C++20 status table.
4954         * doc/html/*: Regenerate.
4955
4956         * include/bits/stl_iterator.h (__cpp_lib_array_constexpr): Revert
4957         value for C++17 to 201803L because P0858R0 is supported for C++17.
4958         * include/std/version (__cpp_lib_array_constexpr): Likewise.
4959         * testsuite/23_containers/array/element_access/constexpr_c++17.cc:
4960         Check for value corresponding to P0031R0 features being tested.
4961         * testsuite/23_containers/array/requirements/constexpr_iter.cc:
4962         Check for value corresponding to P0858R0 features being tested.
4963
4964         * include/std/version (__cpp_lib_three_way_comparison): Define for
4965         freestanding builds.
4966
4967 2020-04-23  Thomas Rodgers  <rodgert@appliantology.com>
4968
4969         * include/experimental/net/executor (system_context): Mark
4970         system_context::system_context() = delete.
4971         * testsuite/experimental/net/executor/1.cc: Add new
4972         test to check system_context is not default constructible.
4973
4974 2020-04-23  Iain Sandoe  <iain@sandoe.co.uk>
4975
4976         * include/std/coroutine: Update the inline namespace to __n4861.
4977         Add the __cpp_lib_coroutine define, set to 201902L.
4978         * include/std/version: Add __cpp_lib_coroutine, set to 201902L.
4979
4980 2020-04-22  Jonathan Wakely  <jwakely@redhat.com>
4981
4982         * include/std/execution (__cpp_lib_execution): Define to indicate
4983         support for P0024R2 and P1001R2.
4984         * include/std/version (__cpp_lib_execution): Define.
4985         * testsuite/25_algorithms/pstl/feature_test.cc: Only test macro
4986         defined by <algorithm>, move other tests to new tests ...
4987         * testsuite/25_algorithms/pstl/feature_test-2.cc: New test.
4988         * testsuite/25_algorithms/pstl/feature_test-3.cc: New test.
4989         * testsuite/25_algorithms/pstl/feature_test-4.cc: New test.
4990         * testsuite/25_algorithms/pstl/feature_test-5.cc: New test.
4991
4992         * include/bits/stl_iterator.h (__cpp_lib_array_constexpr): Define
4993         different values for C++17 and C++20, to indicate different feature
4994         sets. Update value for C++20 to indicate P1032R1 support.
4995         * include/std/version (__cpp_lib_array_constexpr): Likewise.
4996         * testsuite/23_containers/array/comparison_operators/constexpr.cc:
4997         Check feature test macro.
4998         * testsuite/23_containers/array/element_access/constexpr_c++17.cc:
4999         New test.
5000         * testsuite/23_containers/array/requirements/constexpr_fill.cc: Check
5001         feature test macro.
5002         * testsuite/23_containers/array/requirements/constexpr_iter.cc: Test
5003         in C++17 mode and check feature test macro.
5004
5005         * include/std/utility (__cpp_lib_constexpr_algorithms): Do not define
5006         here.
5007         * testsuite/20_util/exchange/constexpr.cc: Do not expect macro to be
5008         defined by <utility>.
5009
5010         * include/std/functional (__cpp_lib_concepts): Update macro value to
5011         indicate P1964R2 support.
5012         * include/std/version (__cpp_lib_concepts): Likewise.
5013         * testsuite/std/concepts/1.cc: Adjust expected value.
5014         * testsuite/std/concepts/2.cc: Likewise.
5015
5016         * include/std/functional (__cpp_lib_constexpr_invoke): Rename to
5017         __cpp_lib_constexpr_functional.
5018         * include/std/version (__cpp_lib_constexpr_invoke): Likewise.
5019         * testsuite/20_util/function_objects/invoke/constexpr.cc: Adjust.
5020
5021         * include/bits/ptr_traits.h (__cpp_lib_constexpr_memory): Define to
5022         indicate P1006R1 support.
5023         (__cpp_lib_to_address): Define to indicate P0653R2 support.
5024         * include/bits/range_access.h (__cpp_lib_ssize): Define to indicate
5025         P1227R2 support.
5026         * include/bits/ranges_algo.h (__cpp_lib_shift): Define to indicate
5027         P0769R2 support.
5028         * include/std/atomic (__cpp_lib_atomic_float): Define to indicate
5029         P0020R6 support.
5030         * include/std/memory (__cpp_lib_assume_aligned): Define to indicate
5031         P1007R3 support.
5032         * include/std/memory_resource (__cpp_lib_polymorphic_allocator):
5033         Define to indicate P0339R6 support.
5034         * include/std/string_view (__cpp_lib_starts_ends_with): Define to
5035         indicate P0457R2 support.
5036         * include/std/type_traits (__cpp_lib_is_nothrow_convertible): Define
5037         to indicate P0758R1 support.
5038         (__cpp_lib_remove_cvref): Define to indicate P0550R2 support.
5039         (__cpp_lib_type_identity): Define to indicate P0887R1 support.
5040         * include/std/version (__cpp_lib_atomic_float)
5041         (__cpp_lib_is_nothrow_convertible, __cpp_lib_remove_cvref)
5042         (__cpp_lib_type_identity, __cpp_lib_assume_aligned)
5043         (__cpp_lib_constexpr_memory, __cpp_lib_polymorphic_allocator)
5044         (__cpp_lib_shift, __cpp_lib_ssize, __cpp_lib_starts_ends_with)
5045         (__cpp_lib_to_address): Define.
5046         * testsuite/20_util/to_address/1_neg.cc: Adjust dg-error line number.
5047
5048         * include/bits/stl_map.h (__cpp_lib_map_insertion): Remove old
5049         macro.
5050         * include/bits/unordered_map.h (__cpp_lib_unordered_map_insertion):
5051         Likewise.
5052         * include/std/version (__cpp_lib_map_insertion)
5053         (__cpp_lib_unordered_map_insertion): Remove.
5054
5055         * include/std/condition_variable (__cpp_lib_jthread): Remove
5056         redundant definition.
5057         * include/std/stop_token (__cpp_lib_jthread): Update macro value to
5058         indicate P1869R1 support.
5059         * include/std/version (__cpp_lib_jthread): Update value.
5060         * testsuite/30_threads/condition_variable_any/stop_token/1.cc: Check
5061         for updated macro value.
5062         * testsuite/30_threads/condition_variable_any/stop_token/2.cc:
5063         Likewise.
5064         * testsuite/30_threads/jthread/1.cc: Likewise.
5065         * testsuite/30_threads/jthread/2.cc: Likewise.
5066         * testsuite/30_threads/stop_token/1.cc: Likewise.
5067         * testsuite/30_threads/stop_token/2.cc: Likewise.
5068
5069         * testsuite/21_strings/basic_string/erasure.cc: Check for
5070         __cpp_lib_erase_if macro.
5071         * testsuite/23_containers/deque/erasure.cc: Add header name to #error
5072         messages.
5073         * testsuite/23_containers/forward_list/erasure.cc: Likewise.
5074         * testsuite/23_containers/list/erasure.cc: Likewise.
5075         * testsuite/23_containers/map/erasure.cc: Likewise.
5076         * testsuite/23_containers/set/erasure.cc: Likewise.
5077         * testsuite/23_containers/unordered_map/erasure.cc: Likewise.
5078         * testsuite/23_containers/unordered_set/erasure.cc: Likewise.
5079         * testsuite/23_containers/vector/erasure.cc: Likewise.
5080
5081 2020-04-21  Jonathan Wakely  <jwakely@redhat.com>
5082
5083         * include/bits/stl_iterator.h (__normal_iterator): Use synth-three-way
5084         to define operator<=>.
5085         * testsuite/24_iterators/normal_iterator/cmp_c++20.cc: New test.
5086
5087         * doc/Makefile.am (xml_sources_manual): Add missing XML files.
5088         * doc/Makefile.in: Regenerate.
5089         * doc/xml/manual/status_cxx1998.xml: Refer to "this section" instead
5090         of "this page".
5091         * doc/xml/manual/status_cxx2011.xml: Formatting and other corrections
5092         to the C++11 status table.
5093         * doc/xml/manual/status_cxx2014.xml: Replace list of C++14 feature
5094         proposals with table matching contents of the C++14 standard.
5095         * doc/xml/manual/status_cxx2017.xml: Add table matching contents of
5096         the C++17 standard.
5097         * doc/html/*: Regenerate.
5098
5099         PR c++/94149
5100         * include/std/type_traits (__is_nt_constructible_impl): Add partial
5101         specializations for bounded arrays with non-empty initializers.
5102         * testsuite/20_util/is_nothrow_constructible/value_c++20.cc: New test.
5103
5104 2020-04-20  Thomas Rodgers  <trodgers@redhat.com>
5105
5106         * testsuite/lib/libstdc++.exp: Add additional_flags=
5107         -DTBB_SUPRESS_DEPRECATED_MESSAGES=1 to suppress warnings when
5108         compiling with a newer Thread Building Blocks.
5109
5110 2020-04-20  Jonathan Wakely  <jwakely@redhat.com>
5111
5112         * testsuite/24_iterators/istreambuf_iterator/sentinel.cc: New test.
5113
5114         * testsuite/20_util/is_constructible/51185.cc: Make test class a
5115         non-aggregate so that the test verifies the same thing in all -std
5116         modes.
5117         * testsuite/20_util/is_constructible/value-2.cc: Adjust expected
5118         results for some types when paren-init for aggregates is supported.
5119
5120         * include/std/version (__cpp_lib_three_way_comparison): Update value.
5121         * libsupc++/compare (__cpp_lib_three_way_comparison): Likewise.
5122         (__detail::__synth3way): Add noexcept-specifier.
5123
5124         * include/bits/stl_map.h (map): Define operator<=> and remove
5125         operator< for C++20.
5126         * include/bits/stl_multimap.h (multimap): Likewise.
5127         * include/bits/stl_multiset.h (multiset): Likewise.
5128         * include/bits/stl_set.h (set): Likewise.
5129         * include/bits/stl_tree.h (_Rb_tree): Likewise.
5130         (_Rb_tree_iterator, _Rb_tree_const_iterator): Remove redundant
5131         operator!= for C++20.
5132         * include/debug/map.h (__gnu_debug::map): Define operator<=> for C++20.
5133         * include/debug/multimap.h (__gnu_debug::multimap): Likewise.
5134         * include/debug/multiset.h (__gnu_debug::multiset): Likewise.
5135         * include/debug/set.h (__gnu_debug::set): Likewise.
5136         * testsuite/23_containers/map/operators/cmp_c++20.cc: New test.
5137         * testsuite/23_containers/multimap/operators/cmp_c++20.cc: New test.
5138         * testsuite/23_containers/multiset/operators/cmp_c++20.cc: New test.
5139         * testsuite/23_containers/set/operators/cmp_c++20.cc: New test.
5140
5141 2020-04-20  Matthias Kretz  <kretz@kde.org>
5142
5143         * testsuite/lib/libstdc++.exp: Avoid illegal argument to verbose.
5144
5145 2020-04-19  Jonathan Wakely  <jwakely@redhat.com>
5146
5147         * include/bits/stl_queue.h (queue): Define operator<=> for C++20.
5148         * include/bits/stl_stack.h (stack): Likewise.
5149         * testsuite/23_containers/queue/cmp_c++20.cc: New test.
5150         * testsuite/23_containers/stack/cmp_c++20.cc: New test.
5151
5152         * include/bits/unordered_map.h (unordered_map, unordered_multimap):
5153         Remove redundant operator!= for C++20.
5154         * include/bits/unordered_set.h (unordered_set, unordered_multiset):
5155         Likewise.
5156         * include/debug/unordered_map (unordered_map, unordered_multimap):
5157         Likewise.
5158         * include/debug/unordered_set (unordered_set, unordered_multiset):
5159         Likewise.
5160
5161         PR other/94629
5162         * include/debug/formatter.h (_Error_formatter::_Parameter): Fix
5163         redundant assignment in constructor.
5164
5165 2020-04-18  Jonathan Wakely  <jwakely@redhat.com>
5166
5167         * include/std/chrono (duration, time_point): Define operator<=> and
5168         remove redundant operator!= for C++20.
5169         * testsuite/20_util/duration/comparison_operators/three_way.cc: New
5170         test.
5171         * testsuite/20_util/time_point/comparison_operators/three_way.cc: New
5172         test.
5173
5174         * testsuite/util/native_type/native_priority_queue.hpp: Use
5175         allocator_traits to rebind allocator.
5176
5177 2020-04-17  Jonathan Wakely  <jwakely@redhat.com>
5178
5179         * include/bits/forward_list.h (forward_list): Define operator<=> and
5180         remove redundant comparison operators for C++20.
5181         * include/bits/stl_bvector.h (vector<bool, Alloc>): Likewise.
5182         * include/bits/stl_deque.h (deque): Likewise.
5183         * include/bits/stl_iterator.h (__normal_iterator): Likewise.
5184         * include/bits/stl_list.h (list): Likewise.
5185         * include/bits/stl_vector.h (vector): Likewise.
5186         * include/debug/deque (__gnu_debug::deque): Likewise.
5187         * include/debug/forward_list (__gnu_debug::forward_list): Likewise.
5188         * include/debug/list (__gnu_debug::list): Likewise.
5189         * include/debug/safe_iterator.h (__gnu_debug::_Safe_iterator):
5190         Likewise.
5191         * include/debug/vector (__gnu_debug::vector): Likewise.
5192         * include/ext/pointer.h (__gnu_cxx::_Pointer_adapter): Define
5193         operator<=> for C++20.
5194         * testsuite/23_containers/deque/operators/cmp_c++20.cc: New test.
5195         * testsuite/23_containers/forward_list/cmp_c++20.cc: New test.
5196         * testsuite/23_containers/list/cmp_c++20.cc: New test.
5197         * testsuite/23_containers/vector/bool/cmp_c++20.cc: New test.
5198         * testsuite/23_containers/vector/cmp_c++20.cc: New test.
5199
5200         * include/bits/basic_string.h (basic_string): Define operator<=> and
5201         remove redundant comparison operators for C++20.
5202         * include/bits/char_traits.h (__gnu_cxx::char_traits, char_traits):
5203         Add comparison_category members.
5204         (__detail::__char_traits_cmp_cat): New helper to get comparison
5205         category from char traits class.
5206         * include/bits/regex.h (regex_traits::_RegexMask::operator!=): Do not
5207         define for C++20.
5208         (sub_match): Define operator<=> and remove redundant comparison
5209         operators for C++20.
5210         (match_results): Remove redundant operator!= for C++20.
5211         * include/std/string_view (basic_string_view): Define operator<=> and
5212         remove redundant comparison operators for C++20.
5213         * testsuite/21_strings/basic_string/operators/char/cmp_c++20.cc: New
5214         test.
5215         * testsuite/21_strings/basic_string/operators/wchar_t/cmp_c++20.cc:
5216         New test.
5217         * testsuite/21_strings/basic_string_view/operations/copy/char/
5218         constexpr.cc: Initialize variable.
5219         * testsuite/21_strings/basic_string_view/operations/copy/wchar_t/
5220         constexpr.cc: Likewise.
5221         * testsuite/21_strings/basic_string_view/operators/char/2.cc: Add
5222         dg-do directive and remove comments showing incorrect signatures.
5223         * testsuite/21_strings/basic_string_view/operators/wchar_t/2.cc:
5224         Likewise.
5225         * testsuite/21_strings/basic_string_view/operators/char/cmp_c++20.cc:
5226         New test.
5227         * testsuite/21_strings/basic_string_view/operators/wchar_t/cmp_c++20.cc:
5228         New test.
5229         * testsuite/28_regex/sub_match/compare_c++20.cc: New test.
5230
5231 2020-04-16  Jonathan Wakely  <jwakely@redhat.com>
5232
5233         * testsuite/20_util/unsynchronized_pool_resource/allocate.cc: Remove
5234         name of unused parameter.
5235
5236 2020-04-15  Jonathan Wakely  <jwakely@redhat.com>
5237
5238         * include/bits/fs_dir.h (file_status): Define operator== for C++20.
5239         (directory_entry): Define operator<=> and remove redundant comparison
5240         operators for C++20.
5241         * include/bits/fs_fwd.h (space_info): Define operator== for C++20.
5242         * include/bits/fs_path.h (path): Define operator<=> and remove
5243         redundant comparison operators for C++20.
5244         * testsuite/27_io/filesystem/path/compare/compare.cc: Fix comment.
5245         * testsuite/27_io/filesystem/path/compare/lwg2936.cc: Likewise.
5246         * testsuite/27_io/filesystem/path/compare/path.cc: Likewise.
5247         * testsuite/27_io/filesystem/path/compare/strings.cc: Likewise.
5248
5249         * include/bits/allocator.h (operator!=): Do not define for C++20.
5250         * include/bits/locale_classes.h (operator!=): Likewise.
5251         * include/bits/std_function.h (operator==(nullptr_t, const function&))
5252         (operator!=(const function&, nullptr_t))
5253         (operator!=(nullptr_t, const function&)): Likewise.
5254         * include/ext/bitmap_allocator.h (operator!=): Likewise.
5255         * include/ext/debug_allocator.h (operator!=): Likewise.
5256         * include/ext/extptr_allocator.h (operator!=): Likewise.
5257         * include/ext/malloc_allocator.h (operator!=): Likewise.
5258         * include/ext/mt_allocator.h (operator!=): Likewise.
5259         * include/ext/new_allocator.h (operator!=): Likewise.
5260         * include/ext/pool_allocator.h (operator!=): Likewise.
5261         * include/ext/throw_allocator.h (operator!=): Likewise.
5262         * include/std/bitset (bitset::operator!=): Likewise.
5263         * include/std/memory_resource (operator!=): Likewise.
5264         * include/std/scoped_allocator (operator!=): Likewise.
5265
5266         * include/std/typeindex (operator<=>): Define for C++20.
5267         * testsuite/20_util/typeindex/comparison_operators_c++20.cc: New test.
5268
5269 2020-04-14  Jonathan Wakely  <jwakely@redhat.com>
5270
5271         * libsupc++/compare (compare_three_way): Fix constraint so that
5272         BUILTIN-PTR-THREE-WAY does not require three_way_comparable_with.
5273         * testsuite/18_support/comparisons/object/builtin-ptr-three-way.cc:
5274         New test.
5275
5276         PR libstdc++/94562
5277         * include/bits/shared_ptr.h (operator<=>): Define for C++20.
5278         * include/bits/shared_ptr_base.h (operator<=>): Likewise.
5279         * include/bits/unique_ptr.h (operator<=>): Add inline specifier.
5280         * testsuite/20_util/shared_ptr/comparison/cmp_c++20.cc: New test.
5281         * testsuite/20_util/shared_ptr/comparison/less.cc: Do not expect
5282         std::less<A*> to be used when comparing std::shared_ptr<A> objects in
5283         C++20.
5284
5285         PR libstdc++/94565
5286         * libsupc++/compare (__unspec): Add noexcept-specifier to constructor.
5287         * testsuite/18_support/comparisons/categories/94565.cc: New test.
5288
5289 2020-04-13  Iain Sandoe  <iain@sandoe.co.uk>
5290
5291         * include/std/coroutine: Update coroutines builtin define,
5292         per n4861.
5293
5294 2020-04-09  Jonathan Wakely  <jwakely@redhat.com>
5295
5296         * libsupc++/compare (compare_three_way): Fix noexcept-specifier.
5297         (strong_order, weak_order, partial_order): Replace uses of <=> with
5298         compare_three_way function object (LWG 3324).
5299         * testsuite/18_support/comparisons/algorithms/partial_order.cc: Add
5300         equality operator so that X satisfies three_way_comparable.
5301         * testsuite/18_support/comparisons/algorithms/strong_order.cc:
5302         Likewise.
5303         * testsuite/18_support/comparisons/algorithms/weak_order.cc: Likewise.
5304
5305         * include/bits/unique_ptr.h (operator<=>): Define for C++20.
5306         * testsuite/20_util/default_delete/48631_neg.cc: Adjust dg-error line.
5307         * testsuite/20_util/default_delete/void_neg.cc: Likewise.
5308         * testsuite/20_util/unique_ptr/comparison/compare.cc: New test.
5309         * testsuite/20_util/unique_ptr/comparison/compare_c++20.cc: New test.
5310
5311 2020-04-08  Jonathan Wakely  <jwakely@redhat.com>
5312
5313         * include/bits/slice_array.h (operator==(const slice&, const slice&)):
5314         Define for C++20.
5315         * include/std/complex (operator==(const T&, const complex<T>&))
5316         (operator!=(const complex<T>&, const complex<T>&))
5317         (operator!=(const complex<T>&, const T&))
5318         (operator!=(const T&, const complex<T>&)): Do not declare for C++20.
5319         * testsuite/26_numerics/slice/compare.cc: New test.
5320
5321         * include/std/charconv (to_chars_result, from_chars_result): Add
5322         defaulted equality comparisons for C++20.
5323         * testsuite/20_util/from_chars/compare.cc: New test.
5324         * testsuite/20_util/to_chars/compare.cc: New test.
5325
5326 2020-04-07  Jonathan Wakely  <jwakely@redhat.com>
5327
5328         PR libstdc++/94520
5329         * include/std/charconv (__integer_to_chars_result_type)
5330         (__integer_from_chars_result_type): Use __or_ instead of __or_v_ to
5331         allow use in C++14.
5332         * testsuite/20_util/from_chars/1.cc: Run test as C++14 and replace
5333         use of std::string_view with std::string.
5334         * testsuite/20_util/from_chars/2.cc: Likewise.
5335         * testsuite/20_util/to_chars/1.cc: Likewise.
5336         * testsuite/20_util/to_chars/2.cc: Likewise.
5337
5338 2020-04-06  Jonathan Wakely  <jwakely@redhat.com>
5339
5340         PR libstdc++/94498
5341         * include/bits/char_traits.h (__gnu_cxx::char_traits::move): Make it
5342         usable in constant expressions for C++20.
5343         (__gnu_cxx::char_traits::copy, __gnu_cxx::char_traits::assign): Add
5344         _GLIBCXX20_CONSTEXPR.
5345         (std::char_traits<char>, std::char_traits<wchar_t>)
5346         (std::char_traits<char8_t>): Make move, copy and assign usable in
5347         constant expressions for C++20.
5348         (std::char_traits<char16_t>, std::char_traits<char32_t>): Make move
5349         and copy usable in constant expressions for C++20.
5350         * include/std/string_view (basic_string_view::copy): Add
5351         _GLIBCXX20_CONSTEXPR.
5352         * testsuite/21_strings/basic_string_view/operations/copy/char/
5353         constexpr.cc: New test.
5354         * testsuite/21_strings/basic_string_view/operations/copy/wchar_t/
5355         constexpr.cc: New test.
5356
5357 2020-04-05  Gerald Pfeifer  <gerald@pfeifer.com>
5358
5359         * doc/xml/manual/appendix_contributing.xml: Refer to Git
5360         documentation instead of Subversion.  Switch to https.
5361         * doc/html/manual/appendix_contributing.html: Regenerate.
5362
5363 2020-04-03  Jonathan Wakely  <jwakely@redhat.com>
5364
5365         PR libstdc++/93960
5366         * include/bits/ptr_traits.h (__to_address): Add special case for debug
5367         iterators, to avoid dereferenceable check.
5368         * testsuite/20_util/to_address/1_neg.cc: Adjust dg-error line number.
5369         * testsuite/20_util/to_address/debug.cc: New test.
5370
5371 2020-04-01  Andrea Corallo  <andrea.corallo@arm.com>
5372
5373         * testsuite/experimental/net/execution_context/use_service.cc:
5374         Require pthread and gthreads.
5375
5376 2020-04-01  Gerald Pfeifer  <gerald@pfeifer.com>
5377
5378         * doc/xml/manual/appendix_free.xml: Move "free books" list from
5379         fsf.org to gnu.org.
5380         * doc/html/manual/appendix_free.html: Regenerate.
5381
5382 2020-03-31  Ville Voutilainen  <ville.voutilainen@gmail.com>
5383
5384         Library-side tests for parenthesized aggregate init
5385
5386         PR c++/92878
5387         PR c++/92947
5388
5389         * testsuite/20_util/allocator_traits/members/92878_92947.cc: New.
5390         * testsuite/20_util/any/assign/92878_92947.cc: Likewise.
5391         * testsuite/20_util/any/cons/92878_92947.cc: Likewise.
5392         * testsuite/20_util/is_constructible/92878_92947.cc: Likewise.
5393         * testsuite/20_util/optional/assignment/92878_92947.cc: Likewise.
5394         * testsuite/20_util/optional/cons/92878_92947.cc: Likewise.
5395         * testsuite/20_util/pair/cons/92878_92947.cc: Likewise.
5396         * testsuite/20_util/shared_ptr/creation/92878_92947.cc: Likewise.
5397         * testsuite/20_util/specialized_algorithms/construct_at/92878_92947.cc:
5398         Likewise.
5399         * testsuite/20_util/unique_ptr/creation/92878_92947.cc: Likewise.
5400         * testsuite/20_util/uses_allocator/92878_92947.cc: Likewise.
5401         * testsuite/20_util/variant/92878_92947.cc: Likewise.
5402         * testsuite/23_containers/deque/modifiers/emplace/92878_92947.cc:
5403         Likewise.
5404         * testsuite/23_containers/forward_list/modifiers/92878_92947.cc:
5405         Likewise.
5406         * testsuite/23_containers/list/modifiers/emplace/92878_92947.cc:
5407         Likewise.
5408         * testsuite/23_containers/map/modifiers/emplace/92878_92947.cc:
5409         Likewise.
5410         * testsuite/23_containers/multimap/modifiers/emplace/92878_92947.cc:
5411         Likewise.
5412         * testsuite/23_containers/multiset/modifiers/emplace/92878_92947.cc:
5413         Likewise.
5414         * testsuite/23_containers/priority_queue/92878_92947.cc: Likewise.
5415         * testsuite/23_containers/queue/92878_92947.cc: Likewise.
5416         * testsuite/23_containers/set/modifiers/emplace/92878_92947.cc:
5417         Likewise.
5418         * testsuite/23_containers/stack/92878_92947.cc: Likewise.
5419         * testsuite/23_containers/unordered_map/modifiers/92878_92947.cc:
5420         Likewise.
5421         * testsuite/23_containers/unordered_multimap/modifiers/92878_92947.cc:
5422         Likewise.
5423         * testsuite/23_containers/unordered_multiset/modifiers/92878_92947.cc:
5424         Likewise.
5425         * testsuite/23_containers/unordered_set/modifiers/92878_92947.cc:
5426         Likewise.
5427         * testsuite/23_containers/vector/modifiers/emplace/92878_92947.cc:
5428         Likewise.
5429
5430 2020-03-28  Jonathan Wakely  <jwakely@redhat.com>
5431
5432         * testsuite/20_util/is_constructible/value-2.cc: Fix test to account
5433         for changes due to parenthesized aggregate-initialization in C++20.
5434         * testsuite/20_util/time_point/cons/81468.cc: Fix test to not clash
5435         with std::chrono::sys_time in C++20.
5436
5437         * include/bits/stl_iterator.h (reverse_iterator): Use requires-clause
5438         to constrain C++20 versions of comparison operators. Fix backwards
5439         logic of relational operators.
5440         (move_iterator): Use requires-clause to constrain comparison operators
5441         in C++20. Do not declare non-standard same-type overloads for C++20.
5442         * testsuite/24_iterators/move_iterator/rel_ops_c++20.cc: Check result
5443         of comparisons and check using greedy_ops type.
5444         * testsuite/24_iterators/reverse_iterator/rel_ops_c++20.cc: Likewise.
5445         * testsuite/24_iterators/move_iterator/greedy_ops.cc: Remove redundant
5446         main function from compile-only test.
5447         * testsuite/24_iterators/reverse_iterator/greedy_ops.cc: Likewise.
5448
5449 2020-03-27  Jonathan Wakely  <jwakely@redhat.com>
5450
5451         * include/bits/range_cmp.h (__cpp_lib_ranges): Define.
5452         * include/bits/stl_iterator.h: Check value of __cpp_concepts so that
5453         C++20 concepts are required.
5454         * include/bits/stl_iterator_base_types.h: Likewise.
5455         * include/std/concepts: Likewise.
5456         * include/std/version: Likewise.
5457         * testsuite/std/ranges/headers/ranges/synopsis.cc: Check feature test
5458         macro.
5459
5460         * include/bits/stl_iterator.h (reverse_iterator::iterator_concept)
5461         (reverse_iterator::iterator_category): Define for C++20.
5462         (reverse_iterator): Define comparison operators correctly for C++20.
5463         (__normal_iterator): Add constraints to comparison operators for C++20.
5464         (move_iterator::operator++(int)) [__cpp_lib_concepts]: Define new
5465         overload for input iterators.
5466         (move_iterator): Add constraints to comparison operators for C++20.
5467         Define operator<=> for C++20.
5468         * testsuite/24_iterators/move_iterator/input_iterator.cc: New test.
5469         * testsuite/24_iterators/move_iterator/move_only.cc: New test.
5470         * testsuite/24_iterators/move_iterator/rel_ops_c++20.cc: New test.
5471         * testsuite/24_iterators/reverse_iterator/rel_ops_c++20.cc: New test.
5472
5473         * include/bits/iterator_concepts.h (__detail::__decay_copy)
5474         (__detail::__member_begin, __detail::__adl_begin): Move here from
5475         <bits/range_access.h>.
5476         (__detail::__ranges_begin, __detail::__range_iter_t): Define.
5477         * bits/range_access.h (__cust_access::__decay_copy)
5478         (__cust_access::__member_begin, __cust_access::__adl_begin): Move to
5479         <bits/iterator_concepts.h>.
5480         (ranges::iterator_t): Use __detail::__range_iter_t.
5481         * include/bits/stl_iterator.h (back_insert_iterator): Simplify
5482         conditional compilation. Add _GLIBCXX20_CONSTEXPR to all members.
5483         (front_insert_iterator): Likewise.
5484         (insert_iterator): Implement changes from P0896R4 for C++20.
5485         * testsuite/24_iterators/back_insert_iterator/constexpr.cc: New test.
5486         * testsuite/24_iterators/front_insert_iterator/constexpr.cc: New test.
5487         * testsuite/24_iterators/headers/iterator/synopsis_c++17.cc: Adjust
5488         for inclusion in synopsis_c++20.cc which expects different signatures
5489         for some function templates.
5490         * testsuite/24_iterators/insert_iterator/constexpr.cc: New test.
5491
5492         * include/std/type_traits (__is_array_convertible): Move definition
5493         to immediately after is_convertible.
5494
5495 2020-03-26  Jonathan Wakely  <jwakely@redhat.com>
5496
5497         * include/std/chrono (chrono::days, chrono::weeks, chrono::years)
5498         (chrono::months, chrono::sys_days, chrono::local_t)
5499         (chrono::local_time, chrono::local_seconds, chrono::local_days):
5500         Define for C++20.
5501         (chrono::time_point): Add missing static assert.
5502         * testsuite/20_util/time_point/requirements/duration_neg.cc: New test.
5503         * testsuite/std/time/clock/file/overview.cc: New test.
5504         * testsuite/std/time/clock/file/members.cc: New test.
5505         * testsuite/std/time/syn_c++20.cc: New test.
5506
5507 2020-03-25  Mike Crowe  <mac@mcrowe.com>
5508
5509         * testsuite/30_threads/shared_timed_mutex/try_lock_until/1.cc: New
5510         test.
5511         * testsuite/30_threads/shared_timed_mutex/try_lock_until/2.cc: New
5512         test.
5513
5514 2020-03-25  Jonathan Wakely  <jwakely@redhat.com>
5515
5516         * include/bits/fs_fwd.h (filesystem::__file_clock): Move to ...
5517         * include/std/chrono (filesystem::__file_clock): Here.
5518         (filesystem::__file_clock::from_sys, filesystem::__file_clock::to_sys):
5519         Define public member functions for C++20.
5520         (is_clock, is_clock_v): Define traits for C++20.
5521         * include/std/condition_variable (condition_variable::wait_until): Add
5522         check for valid clock.
5523         * include/std/future (_State_baseV2::wait_until): Likewise.
5524         * include/std/mutex (__timed_mutex_impl::_M_try_lock_until): Likewise.
5525         * include/std/shared_mutex (shared_timed_mutex::try_lock_shared_until):
5526         Likewise.
5527         * include/std/thread (this_thread::sleep_until): Likewise.
5528         * testsuite/30_threads/condition_variable/members/2.cc: Qualify
5529         slow_clock with new namespace.
5530         * testsuite/30_threads/condition_variable/members/clock_neg.cc: New
5531         test.
5532         * testsuite/30_threads/condition_variable_any/members/clock_neg.cc:
5533         New test.
5534         * testsuite/30_threads/future/members/clock_neg.cc: New test.
5535         * testsuite/30_threads/recursive_timed_mutex/try_lock_until/3.cc:
5536         Qualify slow_clock with new namespace.
5537         * testsuite/30_threads/recursive_timed_mutex/try_lock_until/
5538         clock_neg.cc: New test.
5539         * testsuite/30_threads/shared_future/members/clock_neg.cc: New
5540         test.
5541         * testsuite/30_threads/shared_lock/locking/clock_neg.cc: New test.
5542         * testsuite/30_threads/shared_timed_mutex/try_lock_until/clock_neg.cc:
5543         New test.
5544         * testsuite/30_threads/timed_mutex/try_lock_until/3.cc: Qualify
5545         slow_clock with new namespace.
5546         * testsuite/30_threads/timed_mutex/try_lock_until/4.cc: Likewise.
5547         * testsuite/30_threads/timed_mutex/try_lock_until/clock_neg.cc: New
5548         test.
5549         * testsuite/30_threads/unique_lock/locking/clock_neg.cc: New test.
5550         * testsuite/std/time/traits/is_clock.cc: New test.
5551         * testsuite/util/slow_clock.h (slow_clock): Move to __gnu_test
5552         namespace.
5553
5554 2020-03-21  Jonathan Wakely  <jwakely@redhat.com>
5555
5556         PR libstdc++/93245
5557         * include/experimental/bits/fs_path.h (path::generic_string<C,T,A>()):
5558         * testsuite/experimental/filesystem/path/generic/generic_string.cc:
5559         Improve test coverage.
5560
5561         PR libstdc++/94242
5562         * include/bits/fs_path.h (path::_S_str_convert): Replace first
5563         parameter with basic_string_view so that strings with different
5564         allocators can be accepted.
5565         (path::generic_string<C,T,A>()): Use basic_string object that uses the
5566         right allocator type.
5567         * testsuite/27_io/filesystem/path/generic/94242.cc: New test.
5568         * testsuite/27_io/filesystem/path/generic/generic_string.cc: Improve
5569         test coverage.
5570
5571 2020-03-18  Jonathan Wakely  <jwakely@redhat.com>
5572
5573         PR libstdc++/94033
5574         * include/std/type_traits (__is_nt_default_constructible_atom): Remove.
5575         (__is_nt_default_constructible_impl): Remove.
5576         (__is_nothrow_default_constructible_impl): Remove.
5577         (__is_nt_constructible_impl): Add bool template parameter. Adjust
5578         partial specializations.
5579         (__is_nothrow_constructible_impl): Replace class template with alias
5580         template.
5581         (is_nothrow_default_constructible): Derive from alias template
5582         __is_nothrow_constructible_impl instead of
5583         __is_nothrow_default_constructible_impl.
5584         * testsuite/20_util/is_nothrow_constructible/94003.cc: New test.
5585
5586         * include/std/stop_token (stop_token::_Stop_state_ref): Define
5587         comparison operators explicitly if the compiler won't synthesize them.
5588
5589         * include/bits/stl_algobase.h (__lexicographical_compare_aux): Check
5590         __cpp_lib_concepts before using iter_reference_t.
5591         * include/bits/stream_iterator.h (istream_iterator): Check
5592         __cpp_lib_concepts before using default_sentinel_t.
5593         * include/bits/streambuf_iterator.h (istreambuf_iterator): Likewise.
5594
5595         PR libstdc++/94203
5596         * include/experimental/executor (executor::executor(Executor)): Call
5597         make_shared directly instead of _M_create. Create _Tgt1 object.
5598         (executor::executor(allocator_arg_t, const ProtoAlloc&, Executor)):
5599         Call allocate_shared directly instead of _M_create. Create _Tgt2
5600         object.
5601         (executor::target_type): Add cast needed for new _Tgt interface.
5602         (executor::target): Define when RTTI is disabled. Use _Tgt::_M_func.
5603         (executor::_Tgt): Define the same interface whether RTTI is enabled or
5604         not.
5605         (executor::_Tgt::target_type, executor::_Tgt::target): Do not use
5606         std::type_info in the interface.
5607         (executor::_Tgt::_M_func): Add data member.
5608         (executor::_TgtImpl): Replace with _Tgt1 and _Tgt2 class templates.
5609         (executor::_Tgt1::_S_func): Define function to access target without
5610         depending on RTTI.
5611         (executor::_M_create): Remove.
5612         (operator==, operator!=): Simplify comparisons for executor.
5613         * include/experimental/socket (is_error_code_enum<socket_errc>):
5614         Define specialization before use.
5615         * testsuite/experimental/net/executor/1.cc: New test.
5616
5617 2020-03-16  Jonathan Wakely  <jwakely@redhat.com>
5618
5619         PR libstdc++/94199
5620         * include/experimental/executor (service_already_exists): Add default
5621         constructor. Declare make_service to be a friend.
5622         * testsuite/experimental/net/execution_context/make_service.cc: New
5623         test.
5624
5625 2020-03-12  Jonathan Wakely  <jwakely@redhat.com>
5626
5627         * testsuite/tr1/8_c_compatibility/cstdlib/functions.cc: Do not pass
5628         a null pointer to functions with nonnull(1) attribute.
5629
5630 2020-03-11  Patrick Palka  <ppalka@redhat.com>
5631
5632         * include/std/ranges (split_view::_OuterIter::_OuterIter): Typo fix,
5633         'address' -> 'std::__addressof'.
5634         * testsuite/std/ranges/adaptors/split.cc: Test taking the split_view of
5635         a non-forward input_range.
5636         * testsuite/util/testsuite_iterators.h (output_iterator_wrapper): Make
5637         default constructor protected instead of deleted, like with
5638         input_iterator_wrapper.
5639         (test_range::iterator): Add comment explaining that this type is used
5640         only when the underlying wrapper is input_iterator_wrapper or
5641         output_iterator_wrapper.  Remove delegating defaulted constructor so
5642         that the inherited default constructor is used instead.
5643
5644         LWG 3286 ranges::size is not required to be valid after a call to
5645         ranges::begin on an input range
5646         * include/std/ranges (subrange::subrange): Split single-argument
5647         constructor into two, one constrained by _S_store_size and another by
5648         !_S_store_size.
5649         (take_view::begin): Call size() before calling ranges::begin(_M_base).
5650         * testsuite/std/ranges/adaptors/lwg3286.cc: New test.
5651         * testsuite/std/ranges/subrange/lwg3286.cc: New test.
5652
5653 2020-03-10  Jonathan Wakely  <jwakely@redhat.com>
5654
5655         * include/std/ranges (split_view::_OuterIter::__at_end): Use __current
5656         instead of _M_current.
5657         (split_view::_OuterIter::operator++): Likewise.
5658
5659         * include/std/ranges (transform_view::_Iterator::__iter_move): Remove.
5660         (transform_view::_Iterator::operator*): Add noexcept-specifier.
5661         (transform_view::_Iterator::iter_move): Inline __iter_move body here.
5662         (split_view::_OuterIter::__current): Add noexcept.
5663         (split_view::_InnerIter::__iter_swap): Remove.
5664         (split_view::_InnerIter::__iter_move): Remove.
5665         (split_view::_InnerIter::_M_i_current): New accessors.
5666         (split_view::_InnerIter::__at_end): Use _M_i_current().
5667         (split_view::_InnerIter::operator*): Likewise.
5668         (split_view::_InnerIter::operator++): Likewise.
5669         (iter_move(const _InnerIter&)): Likewise.
5670         (iter_swap(const _InnerIter&, const _InnerIter&)): Likewise.
5671         * testsuite/std/ranges/adaptors/split.cc: Check noexcept-specifier
5672         for iter_move and iter_swap on split_view's inner iterator.
5673
5674         PR c++/94117
5675         * include/std/ranges (ranges::transform_view::_Iterator::iter_move):
5676         Change expression in noexcept-specifier to match function body.
5677
5678         * testsuite/23_containers/unordered_set/allocator/ext_ptr.cc: Add
5679         comment explaining multiple dg-do directives.
5680         * testsuite/24_iterators/ostream_iterator/1.cc: Fix do-do directive
5681         so test is run as well as compiled.
5682
5683 2020-03-09  Jonathan Wakely  <jwakely@redhat.com>
5684
5685         PR libstdc++/94063
5686         * src/c++17/fs_path.cc (path::operator+=(const path&)): Add kluge to
5687         handle concatenations that change the type of the first component.
5688         (path::operator+=(basic_string_view<value_type>)): Likewise.
5689         * testsuite/27_io/filesystem/path/concat/94063.cc: New test.
5690
5691 2020-03-06  Patrick Palka  <ppalka@redhat.com>
5692
5693         * include/std/ranges (join_view::_Sentinel<_Const>): Befriend
5694         join_view::_Sentinel<!_Const>.
5695         * testsuite/std/ranges/adaptors/join.cc: Augment test.
5696
5697         PR libstdc++/93978
5698         * include/bits/range_access.h (__cust_access::_Empty::operator()):
5699         Declare return type to be bool instead of auto.
5700         * testsuite/std/ranges/adaptors/93978.cc: New test.
5701
5702 2020-03-06  Jonathan Wakely  <jwakely@redhat.com>
5703
5704         PR libstdc++/94069
5705         * include/std/shared_mutex [!PTHREAD_RWLOCK_INITIALIZER]
5706         (__shared_mutex_pthread::__shared_mutex_pthread()): Remove incorrect
5707         second argument to __glibcxx_rwlock_init.
5708         * testsuite/30_threads/shared_timed_mutex/94069.cc: New test.
5709
5710         PR libstdc++/93244
5711         * testsuite/27_io/filesystem/path/generic/generic_string.cc: Adjust
5712         test to not fail due to PR 94063.
5713         * testsuite/27_io/filesystem/path/generic/utf.cc: Likewise.
5714         * testsuite/27_io/filesystem/path/generic/wchar_t.cc: Likewise.
5715
5716 2020-03-06  Andreas Krebbel  <krebbel@linux.ibm.com>
5717
5718         * src/c++11/system_error.cc: Omit the ENOTSUP case statement if it
5719         would match ENOSYS.
5720
5721 2020-03-05  Jonathan Wakely  <jwakely@redhat.com>
5722
5723         * testsuite/27_io/filesystem/operations/all.cc: Mark unused variable.
5724         * testsuite/27_io/filesystem/operations/copy.cc: Fix typo.
5725         * testsuite/experimental/filesystem/operations/copy.cc: Likewise.
5726         * testsuite/27_io/filesystem/operations/file_size.cc: Use correct type
5727         for return value, and in comparison.
5728         * testsuite/experimental/filesystem/operations/file_size.cc: Likewise.
5729
5730         PR libstdc++/94051
5731         * include/std/string_view: Include <bits/ostream_insert.h>.
5732         * testsuite/21_strings/basic_string_view/inserters/94051.cc: New test.
5733
5734 2020-03-04  Jonathan Wakely  <jwakely@redhat.com>
5735
5736         * include/bits/cpp_type_traits.h (__memcpyable): Fix comment.
5737
5738 2020-03-04  Patrick Palka  <ppalka@redhat.com>
5739
5740         PR libstdc++/94017
5741         * include/bits/ranges_algobase.h (__fill_n_fn::operator()): Refine
5742         condition for when to use memset, making sure to additionally check that
5743         the output pointer's value type is a non-volatile byte type.  Instead of
5744         requiring that the fill type is a byte type, just require that it's an
5745         integral type.
5746         * testsuite/20_util/specialized_algorithms/uninitialized_fill/94017.cc:
5747         New test.
5748         * testsuite/20_util/specialized_algorithms/uninitialized_fill_n/94017.cc:
5749         New test.
5750         * testsuite/25_algorithms/fill/94013.cc: Uncomment part of test that was
5751         blocked by PR 94017.
5752         * testsuite/25_algorithms/fill/94017.cc: New test.
5753         * testsuite/25_algorithms/fill_n/94017.cc: New test.
5754
5755         LWG 3355 The memory algorithms should support move-only input iterators
5756         introduced by P1207
5757         * include/bits/ranges_uninitialized.h
5758         (__uninitialized_copy_fn::operator()): Use std::move to avoid attempting
5759         to copy __ifirst, which could be a move-only input iterator.  Use
5760         operator- instead of ranges::distance to compute distance from a sized
5761         sentinel.
5762         (__uninitialized_copy_n_fn::operator()): Likewise.
5763         (__uninitialized_move_fn::operator()): Likewise.
5764         (__uninitialized_move_n_fn::operator()): Likewise.
5765         (__uninitialized_destroy_fn::operator()): Use std::move to avoid
5766         attempting to copy __first.
5767         (__uninitialized_destroy_n_fn::operator()): Likewise.
5768         * testsuite/20_util/specialized_algorithms/destroy/constrained.cc:
5769         Augment test.
5770         * .../specialized_algorithms/uninitialized_copy/constrained.cc:
5771         Likewise.
5772         * .../specialized_algorithms/uninitialized_move/constrained.cc:
5773         Likewise.
5774
5775         * testsuite/util/testsuite_iterators.h (test_range::get_iterator): Make
5776         protected instead of private.
5777         (test_sized_range_sized_sent): New.
5778
5779         * testsuite/util/testsuite_iterators.h (input_iterator_wrapper_nocopy):
5780         New testsuite iterator.
5781         * testsuite/24_iterators/counted_iterator/lwg3389.cc: use it.
5782         * testsuite/24_iterators/move_iterator/lwg3390.cc: Likewise.
5783
5784         * include/bits/ranges_uninitialized.h
5785         (uninitialized_copy_fn::operator()): Pass a reference type as the first
5786         argument to is_nothrow_assignable_v.
5787         (uninitialized_copy_fn::operator()): Likewise.
5788         (uninitialized_move_fn::operator()): Likewise.  Return an in_out_result
5789         with the input iterator stripped of its move_iterator.
5790         (uninitialized_move_n_fn::operator()): Likewise.
5791         (uninitialized_fill_fn::operator()): Pass a reference type as the first
5792         argument to is_nothrow_assignable_v.
5793         (uninitialized_fill_n_fn::operator()): Likewise.
5794
5795 2020-03-03  Jonathan Wakely  <jwakely@redhat.com>
5796
5797         PR libstdc++/94013
5798         * include/bits/cpp_type_traits.h (__memcpyable, __memcmpable): New
5799         traits to control when to use memmove and memcmp optimizations.
5800         (__is_nonvolatile_trivially_copyable): New helper trait.
5801         * include/bits/ranges_algo.h (__lexicographical_compare_fn): Do not
5802         use memcmp optimization with volatile data.
5803         * include/bits/ranges_algobase.h (__equal_fn): Use __memcmpable.
5804         (__copy_or_move, __copy_or_move_backward): Use __memcpyable.
5805         * include/bits/stl_algobase.h (__copy_move_a2): Use __memcpyable.
5806         (__copy_move_backward_a2): Likewise.
5807         (__equal_aux1): Use __memcmpable.
5808         (__lexicographical_compare_aux): Do not use memcmp optimization with
5809         volatile data.
5810         * testsuite/25_algorithms/copy/94013.cc: New test.
5811         * testsuite/25_algorithms/copy_backward/94013.cc: New test.
5812         * testsuite/25_algorithms/equal/94013.cc: New test.
5813         * testsuite/25_algorithms/fill/94013.cc: New test.
5814         * testsuite/25_algorithms/lexicographical_compare/94013.cc: New test.
5815         * testsuite/25_algorithms/move/94013.cc: New test.
5816         * testsuite/25_algorithms/move_backward/94013.cc: New test.
5817
5818         * include/bits/stl_algobase.h (lexicographical_compare_three_way):
5819         Avoid redundant iterator comparisons (LWG 3410).
5820
5821 2020-03-02  Jonathan Wakely  <jwakely@redhat.com>
5822
5823         PR libstdc++/93972
5824         * include/bits/stl_algobase.h (__memcmp): Allow pointer types to
5825         differ.
5826         * testsuite/25_algorithms/lexicographical_compare/uchar.cc: New test.
5827
5828         * include/std/ranges (__detail::__maybe_empty_t): Rename to
5829         __maybe_present_t.
5830         (__adaptor::_RangeAdaptor, join_view, split_view): Use new name.
5831
5832         * include/bits/ranges_algo.h (shift_right): Add 'typename' to
5833         dependent type.
5834
5835 2020-03-01  H.J. Lu  <hongjiu.lu@intel.com>
5836
5837         * config/abi/post/x86_64-linux-gnu/x32/baseline_symbols.txt: Updated.
5838
5839 2020-02-29  John David Anglin  <danglin@gcc.gnu.org>
5840
5841         * testsuite/17_intro/headers/c++1998/charset.cc: Skip on *-*-hpux*.
5842         * testsuite/17_intro/headers/c++2011/charset.cc: Likewise.
5843         * testsuite/17_intro/headers/c++2014/charset.cc: Likewise.
5844         * testsuite/17_intro/headers/c++2017/charset.cc: Likewise.
5845         * testsuite/17_intro/headers/c++2020/charset.cc: Likewise.
5846
5847         * testsuite/30_threads/condition_variable_any/stop_token/wait_on.cc:
5848         Add libatomic option.
5849         * testsuite/30_threads/jthread/jthread.cc: Likewise.
5850
5851 2020-02-29  François Dumont  <fdumont@gcc.gnu.org>
5852
5853         * include/bits/stl_algo.h
5854         (__find_if, __count_if, __is_permutation, std::is_permutation): Move...
5855         * include/bits/stl_algobase.h: ...here.
5856         * include/bits/hashtable_policy.h: Remove <bits/stl_algo.h> include.
5857
5858 2020-02-29  John David Anglin  <danglin@gcc.gnu.org>
5859
5860         * testsuite/30_threads/stop_token/stop_callback.cc: Add libatomic
5861         option.
5862         * testsuite/30_threads/stop_token/stop_callback/deadlock-mt.cc:
5863         Likewise.
5864         * testsuite/30_threads/stop_token/stop_callback/deadlock.cc: Likewise.
5865         * testsuite/30_threads/stop_token/stop_callback/destroy.cc: Likewise.
5866         * testsuite/30_threads/stop_token/stop_callback/invoke.cc: Likewise.
5867         * testsuite/30_threads/stop_token/stop_source.cc: Likewise.
5868         * testsuite/30_threads/stop_token/stop_source/assign.cc: Likewise.
5869         * testsuite/30_threads/stop_token/stop_token.cc: Likewise.
5870         * testsuite/30_threads/stop_token/stop_token/stop_possible.cc:
5871         Likewise.
5872
5873         PR libstdc++/92906
5874         * config/abi/post/hppa-linux-gnu/baseline_symbols.txt: Update.
5875
5876 2020-02-28  Patrick Palka  <ppalka@redhat.com>
5877
5878         PR libstdc++/93972
5879         * include/bits/ranges_algo.h (__lexicographical_compare_fn::operator()):
5880         Fix condition for when to use memcmp, making it consistent with the
5881         corresponding condition used in std::lexicographical_compare.
5882         * testsuite/25_algorithms/lexicographical_compare/93972.cc: New test.
5883
5884         * testsuite/26_numerics/headers/numeric/synopsis.cc: Add signatures for
5885         functions introduced in C++11, C++17 and C++2a.  Add 'constexpr' to
5886         existing signatures for C++2a.
5887
5888 2020-02-28  Jonathan Wakely  <jwakely@redhat.com>
5889
5890         * testsuite/24_iterators/range_operations/advance_debug_neg.cc: Run
5891         test instead of just compiling it.
5892
5893 2020-02-28  Patrick Palka  <ppalka@redhat.com>
5894
5895         * include/std/ranges (reverse_view::_S_needs_cached_begin): Set to false
5896         whenever the underlying range models common_range.
5897
5898         * include/std/ranges (__detail::_CachedPosition): New struct.
5899         (views::filter_view::_S_needs_cached_begin): New member variable.
5900         (views::filter_view::_M_cached_begin): New member variable.
5901         (views::filter_view::begin): Use _M_cached_begin to cache its
5902         result.
5903         (views::drop_view::_S_needs_cached_begin): New static member variable.
5904         (views::drop_view::_M_cached_begin): New member variable.
5905         (views::drop_view::begin): Use _M_cached_begin to cache its result
5906         when _S_needs_cached_begin.
5907         (views::drop_while_view::_M_cached_begin): New member variable.
5908         (views::drop_while_view::begin): Use _M_cached_begin to cache its
5909         result.
5910         (views::reverse_view::_S_needs_cached_begin): New static member
5911         variable.
5912         (views::reverse_view::_M_cached_begin): New member variable.
5913         (views::reverse_view::begin): Use _M_cached_begin to cache its result
5914         when _S_needs_cached_begin.
5915         * testsuite/std/ranges/adaptors/drop.cc: Augment test to check that
5916         drop_view::begin caches its result.
5917         * testsuite/std/ranges/adaptors/drop_while.cc: Augment test to check
5918         that drop_while_view::begin caches its result.
5919         * testsuite/std/ranges/adaptors/filter.cc: Augment test to check that
5920         filter_view::begin caches its result.
5921         * testsuite/std/ranges/adaptors/reverse.cc: Augment test to check that
5922         reverse_view::begin caches its result.
5923
5924 2020-02-28  Jonathan Wakely  <jwakely@redhat.com>
5925
5926         * testsuite/27_io/filesystem/operations/last_write_time.cc: Fixes for
5927         filesystems that silently truncate timestamps.
5928         * testsuite/experimental/filesystem/operations/last_write_time.cc:
5929         Likewise.
5930
5931         * testsuite/21_strings/basic_string/cons/char/1.cc: Disable
5932         -Wstringop-overflow warnings.
5933
5934 2020-02-27  Jonathan Wakely  <jwakely@redhat.com>
5935
5936         * testsuite/lib/libstdc++.exp (v3_target_compile): Add
5937         -fdiagnostics-urls=never to options.
5938
5939 2020-02-27  Patrick Palka  <ppalka@redhat.com>
5940
5941         * include/std/ranges (transform_view::_Iterator<_Const>): Befriend
5942         _Iterator<!_Const>.
5943         (transform_view::_Sentinel<_Const>): Befriend _Sentinel<!_Const>.
5944         (take_view::_Sentinel<_Const>): Likewise.
5945         (take_while_view::_Sentinel<_Const>): Likewise.
5946         (split_view::_OuterIter<_Const>): Befriend _OuterIter<!_Const>.
5947         * testsuite/std/ranges/adaptors/split.cc: Augment test.
5948         * testsuite/std/ranges/adaptors/take.cc: Augment test.
5949         * testsuite/std/ranges/adaptors/take_while.cc: Augment test.
5950         * testsuite/std/ranges/adaptors/transform.cc: Augment test.
5951
5952         * testsuite/25_algorithms/copy/constrained.cc: Don't assume that the
5953         base() of a vector<>::iterator is a pointer.
5954         * testsuite/25_algorithms/copy_backward/constrained.cc: Likewise.
5955         * testsuite/25_algorithms/move/constrained.cc: Likewise.
5956         * testsuite/25_algorithms/move_backward/constrained.cc: Likewise.
5957         * testsuite/25_algorithms/inplace_merge/constrained.cc: Use foo.data()
5958         instead of &foo[0].
5959         * testsuite/25_algorithms/partial_sort/constrained.cc: Likewise.
5960         * testsuite/25_algorithms/partial_sort_copy/constrained.cc: Likewise.
5961         * testsuite/25_algorithms/shuffle/constrained.cc: Likewise.
5962         * testsuite/25_algorithms/sort/constrained.cc: Likewise.
5963         * testsuite/25_algorithms/stable_sort/constrained.cc: Likewise.
5964
5965 2020-02-27  Jonathan Wakely  <jwakely@redhat.com>
5966
5967         * include/debug/array (operator<=>): Define for C++20.
5968         * testsuite/23_containers/array/tuple_interface/get_debug_neg.cc:
5969         Adjust dg-error line numbers.
5970         * testsuite/23_containers/array/tuple_interface/
5971         tuple_element_debug_neg.cc: Likewise.
5972
5973         * testsuite/23_containers/span/back_assert_neg.cc: Add #undef before
5974         defining _GLIBCXX_ASSERTIONS.
5975         * testsuite/23_containers/span/first_2_assert_neg.cc: Likewise.
5976         * testsuite/23_containers/span/first_assert_neg.cc: Likewise.
5977         * testsuite/23_containers/span/front_assert_neg.cc: Likewise.
5978         * testsuite/23_containers/span/index_op_assert_neg.cc: Likewise.
5979         * testsuite/23_containers/span/last_2_assert_neg.cc: Likewise.
5980         * testsuite/23_containers/span/last_assert_neg.cc: Likewise.
5981         * testsuite/23_containers/span/subspan_2_assert_neg.cc: Likewise.
5982         * testsuite/23_containers/span/subspan_3_assert_neg.cc: Likewise.
5983         * testsuite/23_containers/span/subspan_4_assert_neg.cc: Likewise.
5984         * testsuite/23_containers/span/subspan_5_assert_neg.cc: Likewise.
5985         * testsuite/23_containers/span/subspan_6_assert_neg.cc: Likewise.
5986         * testsuite/23_containers/span/subspan_assert_neg.cc: Likewise.
5987
5988         * include/debug/string (__gnu_debug::basic_string::insert): Fix for
5989         C++98 where the member function of the base class returns void.
5990
5991         * testsuite/util/testsuite_iterators.h (forward_iterator_wrapper): Add
5992         equality comparisons that support value-initialized iterators.
5993
5994         * include/bits/boost_concept_check.h (__function_requires): Add
5995         _GLIBCXX14_CONSTEXPR.
5996         * testsuite/25_algorithms/min/concept_checks.cc: New test.
5997
5998 2020-02-26  Patrick Palka  <ppalka@redhat.com>
5999
6000         PR libstdc++/93936
6001         * include/std/ranges (split_view::_InnerIter::operator==): Compare
6002         the operands' _M_i rather than their _M_i.current().
6003         * testsuite/std/ranges/adaptors/split.cc: Augment test.
6004
6005         P1645R1 constexpr for <numeric> algorithms
6006         * include/bits/stl_numeric.h (iota, accumulate, inner_product,
6007         partial_sum, adjacent_difference): Make conditionally constexpr for
6008         C++20.
6009         * include/std/numeric (__cpp_lib_constexpr_numeric): Define this feature
6010         test macro.
6011         (reduce, transform_reduce, exclusive_scan, inclusive_scan,
6012         transform_exclusive_scan, transform_inclusive_scan): Make conditionally
6013         constexpr for C++20.
6014         * include/std/version (__cpp_lib_constexpr_numeric): Define.
6015         * testsuite/26_numerics/accumulate/constexpr.cc: New test.
6016         * testsuite/26_numerics/adjacent_difference/constexpr.cc: Likewise.
6017         * testsuite/26_numerics/exclusive_scan/constexpr.cc: Likewise.
6018         * testsuite/26_numerics/inclusive_scan/constexpr.cc: Likewise.
6019         * testsuite/26_numerics/inner_product/constexpr.cc: Likewise.
6020         * testsuite/26_numerics/iota/constexpr.cc: Likewise.
6021         * testsuite/26_numerics/partial_sum/constexpr.cc: Likewise.
6022         * testsuite/26_numerics/reduce/constexpr.cc: Likewise.
6023         * testsuite/26_numerics/transform_exclusive_scan/constexpr.cc: Likewise.
6024         * testsuite/26_numerics/transform_inclusive_scan/constexpr.cc: Likewise.
6025         * testsuite/26_numerics/transform_reduce/constexpr.cc: Likewise.
6026
6027 2020-02-26  Jonathan Wakely  <jwakely@redhat.com>
6028
6029         * include/bits/ranges_algo.h (__lexicographical_compare_fn): Declare
6030         variables in smaller scope and avoid calling ranges::distance when we
6031         know they are pointers. Remove statically-unreachable use of
6032         __builtin_unreachable().
6033         * include/bits/stl_algobase.h (__lexicographical_compare::__lc):
6034         Define inline.
6035
6036         * include/std/ranges (__detail::__maybe_empty_t): Define new helper
6037         alias.
6038         (__detail::__maybe_const_t): Likewise.
6039         (__adaptor::_RangeAdaptor): Use __maybe_empty_t.
6040         (transform_view, take_view, take_while_view, elements_view): Use
6041         __maybe_const_t.
6042         (join_view, split_view): Use both.
6043
6044 2020-02-25  Patrick Palka  <ppalka@redhat.com>
6045
6046         LWG 3397 basic_istream_view::iterator should not provide
6047         iterator_category
6048         * include/std/ranges (basic_istream_view:_Iterator::iterator_category):
6049         Rename to ...
6050         (basic_istream_view:_Iterator::iterator_concept): ... this.
6051         * testsuite/std/ranges/istream_view.cc: Augment test.
6052
6053         LWG 3325 Constrain return type of transformation function for
6054         transform_view
6055         * include/std/ranges (transform_view): Constrain the return type of the
6056         transformation function as per LWG 3325.
6057         * testsuite/std/ranges/adaptors/lwg3325_neg.cc: New test.
6058
6059         LWG 3313 join_view::_Iterator::operator-- is incorrectly constrained
6060         * include/std/ranges (join_view::_Iterator::operator--): Require that
6061         range_reference_t<_Base> models common_range.
6062         * testsuite/std/ranges/adaptors/lwg3313_neg.cc: New test.
6063
6064         LWG 3301 transform_view::_Iterator has incorrect iterator_category
6065         * include/std/ranges (transform_view::_Iterator::_S_iter_cat): Adjust
6066         determination of iterator_category as per LWG 3301.
6067         * testsuite/std/ranges/adaptors/transform.cc: Augment test.
6068
6069         LWG 3292 iota_view is under-constrained
6070         * include/std/ranges (iota_view): Require that _Winc models semiregular
6071           as per LWG 3292.
6072         * testsuite/std/ranges/iota/lwg3292_neg.cc: New test.
6073
6074 2020-02-25  Jonathan Wakely  <jwakely@redhat.com>
6075
6076         * include/bits/ranges_algobase.h (__copy_or_move): Do not use memmove
6077         during constant evaluation. Call __builtin_memmove directly instead of
6078         __memmove.
6079         (__copy_or_move_backward): Likewise.
6080         * include/bits/stl_algobase.h (__memmove): Remove.
6081         (__copy_move<M, true, random_access_iterator_tag>::__copy_m)
6082         (__copy_move_backward<M, true, random_access_iterator_tag>::__copy_m):
6083         Use __builtin_memmove directly instead of __memmove.
6084         (__copy_move_a2): Do not use memmove during constant evaluation.
6085         (__copy_move_backward_a2): Use _IsMove constant to select correct
6086         __copy_move_backward specialization.
6087         * testsuite/25_algorithms/copy_backward/constexpr.cc: Check for copies
6088         begin turned into moves during constant evaluation.
6089
6090         * testsuite/25_algorithms/move_backward/93872.cc: Add test left out of
6091         previous commit.
6092
6093         PR libstdc++/93872
6094         * include/bits/stl_algobase.h (__memmove): Cast away const before
6095         doing move assignment.
6096         * testsuite/25_algorithms/move/93872.cc: New test.
6097         * testsuite/25_algorithms/move_backward/93872.cc: New test.
6098
6099 2020-02-24  Patrick Palka  <ppalka@redhat.com>
6100
6101         PR libstdc++/93884
6102         * include/bits/ranges_algobase.h (__copy_or_move,
6103         __copy_or_move_backward): Don't inspect the iter_value_t of the output
6104         iterator, instead inspect its iterator_traits directly.
6105         * include/bits/stl_iterator.h (back_insert_iterator::container):
6106         Conditionally initialize.
6107         (back_insert_iterator::difference_type): Conditionally define.
6108         (back_insert_iterator::back_insert_iterator): Conditionally define this
6109         default constructor.
6110         (front_insert_iterator::container): Conditionally initialize.
6111         (front_insert_iterator::difference_type): Conditionally define.
6112         (front_insert_iterator::front_insert_iterator): Conditionally define
6113         this default constructor.
6114         * 24_iterators/back_insert_iterator/pr93884.cc: New test.
6115         * 24_iterators/front_insert_iterator/pr93884.cc: New test.
6116
6117         P0769R2 Add shift to <algorithm>
6118         * include/bits/ranges_algo.h (shift_left, shift_right): New.
6119         * testsuite/25_algorithms/shift_left/1.cc: New test.
6120         * testsuite/25_algorithms/shift_right/1.cc: New test.
6121
6122 2020-02-24  Jonathan Wakely  <jwakely@redhat.com>
6123
6124         * include/bits/stream_iterator.h (istream_iterator(default_sentinel_t)):
6125         Make noexcept-specifier conditional.
6126         * testsuite/24_iterators/istream_iterator/cons/sentinel.cc: Check
6127         noexcept-specifier.
6128
6129         * include/bits/stream_iterator.h (istream_iterator(default_sentinel_t)):
6130         Add constructor.
6131         (operator==(istream_iterator, default_sentinel_t)): Add operator.
6132         (ostream_iterator::difference_type): Define to ptrdiff_t for C++20.
6133         * include/bits/streambuf_iterator.h
6134         (istreambuf_iterator(default_sentinel_t)): Add constructor.
6135         (operator==(istreambuf_iterator, default_sentinel_t)): Add operator.
6136         * testsuite/24_iterators/istream_iterator/cons/sentinel.cc:
6137         New test.
6138         * testsuite/24_iterators/istream_iterator/sentinel.cc: New test.
6139         * testsuite/24_iterators/istreambuf_iterator/cons/sentinel.cc:
6140         New test.
6141         * testsuite/24_iterators/istreambuf_iterator/sentinel.cc: New test.
6142
6143         * include/std/ranges (__deep_const_range, __enable_view_impl): Remove.
6144         (ranges::enable_view): Simplify (LWG 3326).
6145         * include/bits/range_access.h (ranges::enable_view): Declare.
6146         * include/bits/regex.h (__enable_view_impl): Remove partial
6147         specialization.
6148         * include/bits/stl_multiset.h (__enable_view_impl): Likewise.
6149         * include/bits/stl_set.h (__enable_view_impl): Likewise.
6150         * include/bits/unordered_set.h (__enable_view_impl): Likewise.
6151         * include/debug/multiset.h (__enable_view_impl): Likewise.
6152         * include/debug/set.h (__enable_view_impl): Likewise.
6153         * include/debug/unordered_set (__enable_view_impl): Likewise.
6154         * include/experimental/string_view (ranges::enable_view): Define
6155         partial specialization.
6156         * include/std/span (ranges::enable_view): Likewise.
6157         * include/std/string_view (ranges::enable_view): Likewise.
6158         * testsuite/std/ranges/view.cc: Check satisfaction of updated concept.
6159
6160 2020-02-21  Jonathan Wakely  <jwakely@redhat.com>
6161
6162         * include/std/optional (operator<=>(optional<T>, optional<U>))
6163         (operator<=>(optional<T>, nullopt), operator<=>(optional<T>, U)):
6164         Define for C++20.
6165         * include/std/tuple (__tuple_cmp): New helper function for <=>.
6166         (operator<=>(tuple<T...>, tuple<U>...)): Define for C++20.
6167         * include/std/variant (operator<=>(variant<T...>, variant<T...>))
6168         (operator<=>(monostate, monostate)): Define for C++20.
6169         * testsuite/20_util/optional/relops/three_way.cc: New test.
6170         * testsuite/20_util/tuple/comparison_operators/three_way.cc: New test.
6171         * testsuite/20_util/variant/89851.cc: Move to ...
6172         * testsuite/20_util/variant/relops/89851.cc: ... here.
6173         * testsuite/20_util/variant/90008.cc: Move to ...
6174         * testsuite/20_util/variant/relops/90008.cc: ... here.
6175         * testsuite/20_util/variant/relops/three_way.cc: New test.
6176
6177 2020-02-20  Patrick Palka  <ppalka@redhat.com>
6178
6179         * include/std/ranges (views::__adaptor::__maybe_refwrap): New utility
6180         function.
6181         (views::__adaptor::_RangeAdaptor::operator()): Add comments.  Use
6182         __maybe_refwrap to capture lvalue references by reference, and then use
6183         unwrap_reference_t to forward the by-reference captures as references.
6184         * testsuite/std/ranges/adaptors/split.cc: Augment test.
6185         * testsuite/std/ranges/adaptors/split_neg.cc: New test.
6186
6187         * include/std/ranges (iota_view): Forward declare _Sentinel.
6188         (iota_view::_Iterator): Befriend _Sentinel.
6189         (iota_view::_Sentinel::_M_equal): New member function.
6190         (iota_view::_Sentinel::operator==): Use it.
6191         (views::_Iota::operator()): Forward __f using the correct type.
6192         * testsuite/std/ranges/access/ssize.cc (test06): Don't call views::iota
6193         with integers of different signedness, to appease iota_view's deduction
6194         guide.
6195         * testsuite/std/ranges/iota/iota_view.cc: Augment test.
6196
6197 2020-02-20  Jonathan Wakely  <jwakely@redhat.com>
6198
6199         * include/bits/range_access.h (ranges::begin): Reject array of
6200         incomplete type.
6201         (ranges::end, ranges::size): Require arrays to be bounded.
6202         (ranges::data): Require lvalue or borrowed_range.
6203         (ranges::iterator_t): Remove constraint.
6204         * testsuite/std/ranges/access/begin.cc: Do not check array of
6205         incomplete type.
6206         * testsuite/std/ranges/access/begin_neg.cc: New test.
6207         * testsuite/std/ranges/access/end_neg.cc: Adjust expected error.
6208         * testsuite/std/ranges/access/size_neg.cc: Adjust expected error.
6209         * testsuite/std/ranges/access/ssize.cc: Do not check array of
6210         incomplete type.
6211
6212         * include/std/system_error (error_category::operator<=>)
6213         (operator<=>(const error_code&, const error_code&))
6214         (operator<=>(const error_condition&, const error_condition&)): Define
6215         for C++20.
6216         * testsuite/19_diagnostics/error_category/operators/less.cc: New test.
6217         * testsuite/19_diagnostics/error_category/operators/three_way.cc: New
6218         test.
6219         * testsuite/19_diagnostics/error_code/operators/equal.cc: Remove
6220         incorrect comment.
6221         * testsuite/19_diagnostics/error_code/operators/less.cc: New test.
6222         * testsuite/19_diagnostics/error_code/operators/not_equal.cc: Remove
6223         incorrect comment.
6224         * testsuite/19_diagnostics/error_code/operators/three_way.cc: New test.
6225         * testsuite/19_diagnostics/error_condition/operators/equal.cc: Remove
6226         incorrect comment.
6227         * testsuite/19_diagnostics/error_condition/operators/less.cc: New test.
6228         * testsuite/19_diagnostics/error_condition/operators/not_equal.cc:
6229         Remove incorrect comment.
6230         * testsuite/19_diagnostics/error_condition/operators/three_way.cc: New
6231         test.
6232
6233         * libsupc++/typeinfo (type_info::operator!=): Remove for C++20.
6234
6235         * include/std/thread (thread::id::operator<=>): Define for C++20.
6236         * testsuite/30_threads/thread/id/70294.cc: Do not take addresses of
6237         functions in namespace std.
6238         * testsuite/30_threads/thread/id/operators_c++20.cc: New test.
6239
6240 2020-02-19  Patrick Palka  <ppalka@redhat.com>
6241
6242         * testsuite/std/ranges/adaptors/split.cc (test03): Don't include the
6243         null terminator of the underlying string as part of the test_range.
6244         (main): Call test03.
6245
6246 2020-02-19  Jonathan Wakely  <jwakely@redhat.com>
6247
6248         * include/bits/stl_iterator.h (common_iterator): Add copyable<I>
6249         requirement (LWG 3385).
6250         * testsuite/24_iterators/headers/iterator/synopsis_c++20.cc: Adjust
6251         expected declaration.
6252
6253         * include/std/ranges (take_while_view, drop_view, drop_while_view)
6254         (elements_view:_Iterator): Initialize data members (LWG 3364).
6255
6256         * libsupc++/compare (three_way_comparable): Remove always-false check
6257         that should have been removed with weak_equality (P1959R0).
6258         (three_way_comparable_with): Likewise. Reorder requirements (LWG 3360).
6259
6260         * include/std/concepts (__detail::__partially_ordered_with): Move here
6261         from <compare>.
6262         (totally_ordered, totally_ordered_with): Use __partially_ordered_with
6263         to simplify definition (LWG 3331).
6264         * libsupc++/compare (__detail::__partially_ordered_with): Move to
6265         <concepts>.
6266
6267         * include/std/concepts (totally_ordered_with): Remove redundant
6268         requirement (LWG 3329).
6269
6270         * include/std/ranges (__detail::__convertible_to_non_slicing): New
6271         helper concept.
6272         (__detail::__pair_like_convertible_to): Remove.
6273         (__detail::__pair_like_convertible_from): Add requirements for
6274         non-slicing conversions.
6275         (subrange): Constrain constructors with __convertible_to_non_slicing.
6276         Remove constructors from pair-like types. Add new deduction guide.
6277         * testsuite/std/ranges/subrange/lwg3282_neg.cc: New test.
6278
6279         * include/bits/iterator_concepts.h (iter_move): Add declaration to
6280         prevent unqualified lookup finding a suitable declaration (LWG 3247).
6281
6282         * include/std/memory_resource (polymorphic_allocator::allocate)
6283         (polymorphic_allocator::allocate_object): Change type of exception to
6284         bad_array_new_length (LWG 3237).
6285         * testsuite/20_util/polymorphic_allocator/lwg3237.cc: New test.
6286
6287         * include/std/type_traits (__cpp_lib_unwrap_ref): Define (LWG 3348).
6288         * include/std/version (__cpp_lib_unwrap_ref): Likewise.
6289         * testsuite/20_util/unwrap_reference/1.cc: Check macro.
6290         * testsuite/20_util/unwrap_reference/3.cc: New test.
6291
6292         * include/std/numeric (midpoint(T8, T*)): Do not check for complete
6293         type during overload resolution, use static assert instead (LWG 3200).
6294         * testsuite/26_numerics/midpoint/pointer.cc: Do not test with
6295         incomplete type.
6296         * testsuite/26_numerics/midpoint/pointer_neg.cc: New test.
6297
6298         * include/std/span (span(T (&)[N])): Use non-deduced context to
6299         prevent first parameter from interfering with class template argument
6300         deduction (LWG 3369).
6301         * testsuite/23_containers/span/deduction.cc: Add missing 'const'.
6302         * testsuite/23_containers/span/lwg3255.cc: Check for construction from
6303         rvalues.
6304
6305         * include/std/span (span::const_iterator, span::const_reverse_iterator)
6306         (span::cbegin(), span::cend(), span::crbegin(), span::crend()):
6307         Remove (LWG 3320).
6308         * testsuite/23_containers/span/everything.cc: Replace uses of cbegin
6309         and cend.
6310         * testsuite/20_util/specialized_algorithms/destroy/constrained.cc:
6311         Likewise.
6312         * testsuite/20_util/specialized_algorithms/uninitialized_copy/
6313         constrained.cc: Likewise.
6314         * testsuite/20_util/specialized_algorithms/
6315         uninitialized_default_construct/constrained.cc: Likewise.
6316         * testsuite/20_util/specialized_algorithms/uninitialized_fill/
6317         constrained.cc: Likewise.
6318         * testsuite/20_util/specialized_algorithms/uninitialized_move/
6319         constrained.cc: Likewise.
6320         * testsuite/20_util/specialized_algorithms/
6321         uninitialized_value_construct/constrained.cc: Likewise.
6322
6323         * include/bits/range_access.h (range_size_t): Define alias template.
6324         * include/std/ranges (all_view): Rename to views::all_t (LWG 3335).
6325         * testsuite/std/ranges/adaptors/filter.cc: Adjust to new name.
6326
6327         * include/std/ranges (filter_view, transform_view, take_view)
6328         (join_view, split_view, reverse_view): Remove commented-out converting
6329         constructors (LWG 3280).
6330
6331         * include/std/memory (uninitialized_construct_using_allocator): Use
6332         std::construct_at (LWG 3321).
6333
6334         * include/std/memory_resource (polymorphic_allocator::allocate_bytes)
6335         (polymorphic_allocator::allocate_object)
6336         (polymorphic_allocator::new_object): Add nodiscard attribute (LWG3304).
6337
6338         LWG 3379. "safe" in several library names is misleading
6339         * include/bits/range_access.h (enable_safe_range): Rename to
6340         enable_borrowed_range.
6341         (__detail::__maybe_safe_range): Rename to __maybe_borrowed_range.
6342         (safe_range): Rename to borrowed_range.
6343         * include/bits/ranges_algo.h: Adjust to use new names.
6344         * include/bits/ranges_algobase.h: Likewise.
6345         * include/bits/ranges_uninitialized.h: Likewise.
6346         * include/std/ranges: Likewise.
6347         (safe_iterator_t): Rename to borrowed_iterator_t.
6348         (safe_subrange_t): Rename to borrowed_subrange_t.
6349         * include/std/span: Adjust to use new names.
6350         * include/std/string_view: Likewise.
6351         * include/experimental/string_view: Likewise.
6352         * testsuite/std/ranges/access/begin.cc: Likewise.
6353         * testsuite/std/ranges/access/cbegin.cc: Likewise.
6354         * testsuite/std/ranges/access/cdata.cc: Likewise.
6355         * testsuite/std/ranges/access/cend.cc: Likewise.
6356         * testsuite/std/ranges/access/crbegin.cc: Likewise.
6357         * testsuite/std/ranges/access/crend.cc: Likewise.
6358         * testsuite/std/ranges/access/data.cc: Likewise.
6359         * testsuite/std/ranges/access/end.cc: Likewise.
6360         * testsuite/std/ranges/access/rbegin.cc: Likewise.
6361         * testsuite/std/ranges/access/rend.cc: Likewise.
6362         * testsuite/std/ranges/safe_range.cc: Likewise.
6363         * testsuite/std/ranges/safe_range_types.cc: Likewise.
6364         * testsuite/util/testsuite_iterators.h: Likewise.
6365
6366         * include/std/ranges (tuple_element<0, const subrange<I, S, K>>)
6367         (tuple_element<1, const subrange<I, S, K>>): Add partial
6368         specializations (LWG 3398).
6369         * testsuite/std/ranges/subrange/tuple_like.cc: New test.
6370
6371         * include/bits/ranges_algo.h (__find_fn, __find_first_of_fn)
6372         (__adjacent_find_fn, __remove_if_fn, __remove_copy_if_fn)
6373         (__unique_fn, __unique_copy_fn): Remove redundant conversions to bool.
6374
6375 2020-02-18  Patrick Palka  <ppalka@redhat.com>
6376
6377         P1983R0 Wording for GB301, US296, US292, US291, and US283
6378         * include/std/ranges (filter_view::pred): New member function.
6379         (join_view::_Iterator::_Iterator): Remove now-redundant comment since
6380         P1983R0 fixes the highlighted issue in the same way.
6381         (join_view::_Iterator<_Const>): Add friend
6382         join_view::_Iterator<!_Const>.
6383         (join_view::_M_inner): Remove mutable specifier, effectively reverting
6384         the proposed wording changes of P3278.
6385         (join_view::begin): Refine the condition for when to return a const
6386         iterator.
6387         (split_view::_OuterIter::_OuterIter): Adjust constraints.
6388         * testsuite/std/ranges/adaptors/filter.cc: Test that filter_view::pred
6389         exists and works.
6390
6391 2020-02-18  Jonathan Wakely  <jwakely@redhat.com>
6392
6393         PR libstdc++/93818
6394         * include/std/ranges (_RangeAdaptor): Add deduction guide.
6395         (filter_view::_Iterator): Add alias _Vp_iter and use in place of
6396         iterator_t<_Vp>.
6397         (filter_view::_Iterator::_S_iter_cat()): Add 'typename'.
6398         (transform_view::_Iterator): Add alias _Base_iter and use in place of
6399         iterator_t<_Base>.
6400         (transform_view::_Iterator::_S_iter_cat()): Add 'typename'.
6401         (join_view::_Iterator): Add _Outer_iter and _Inner_iter aliases.
6402         (join_view::_Iterator::_S_iter_cat()): Add 'typename'.
6403         (split_view::_InnerIter::_S_iter_cat()): Likewise.
6404
6405         * testsuite/20_util/integer_comparisons/equal.cc: Fix invalid
6406         assumption that long is wider than int.
6407         * testsuite/20_util/integer_comparisons/greater_equal.cc: Likewise.
6408         * testsuite/20_util/integer_comparisons/less.cc: Likewise.
6409         * testsuite/20_util/integer_comparisons/less_equal.cc: Likewise.
6410         * testsuite/20_util/integer_comparisons/not_equal.cc: Likewise.
6411
6412         P1976R2 Fixed-size span construction from dynamic range
6413         * include/std/span (__cpp_lib_span): Update value.
6414         (span(It, size_type), span(It, End)): Make conditionally explicit. Add
6415         assertion.
6416         (span(R&&), span(const span<OType, OExtent>&)): Likewise and relax
6417         constraints.
6418         (span::first<Count>(), span::last<Count>()): Use explicit type in
6419         return statement.
6420         (as_bytes, as_writable_bytes): Likewise.
6421         * include/std/version (__cpp_lib_span): Update value.
6422         * testsuite/23_containers/span/1.cc: Check new value.
6423         * testsuite/23_containers/span/2.cc: Check new value.
6424         * testsuite/23_containers/span/explicit.cc: New test.
6425
6426         * include/std/span (span::__is_compatible_array): Simplify alias
6427         template by using requires-clause.
6428         (span::__is_compatible_ref): New alias template for constraining
6429         constructors.
6430         (span::__is_compatible_iterator, span::__is_compatible_range): Remove.
6431         (span(It, size_type), span(It, End)): Use __is_compatible_ref.
6432         (span(T(&)[N], span(array<T, N>&), span(const array<T, N>&)): Remove
6433         redundant parentheses.
6434         (span(R&&)): Add missing constraints.
6435
6436         * include/std/span (span): Reorder members and rename template
6437         parameters to match declarations in the C++2a working paper.
6438
6439         P2116R0 Remove tuple-like protocol support from fixed-extent span
6440         * include/std/span (get, tuple_size, tuple_element): Remove.
6441         * testsuite/23_containers/span/everything.cc: Remove checks for
6442         tuple-like API.
6443         * testsuite/23_containers/span/get_neg.cc: Remove.
6444         * testsuite/23_containers/span/tuple_element_dynamic_neg.cc: Remove.
6445         * testsuite/23_containers/span/tuple_element_oob_neg.cc: Remove.
6446         * testsuite/23_containers/span/tuple_size_neg.cc: Remove.
6447
6448 2020-02-17  Patrick Palka  <ppalka@redhat.com>
6449
6450         P2106R0 Alternative wording for GB315 and GB316
6451         * include/bits/ranges_algo.h (in_fun_result): New.
6452         (for_each_result, for_each_n_result): Change into an alias of
6453         in_fun_result.
6454         (in_in_result): New.
6455         (mismatch_result): Change into an alias of in_in_result.
6456         (copy_if_result): Change into an alias of in_out_result.
6457         (swap_ranges_result): Change into an alias of in_in_result.
6458         (unary_transform_result): Change into an alias of in_out_result.
6459         (in_in_out_result): New.
6460         (binary_transform_result): Change into an alias of in_in_out_result.
6461         (replace_copy_result, replace_copy_if_result, remove_copy_if_result,
6462         remove_copy_result, unique_copy_result, reverse_copy_result,
6463         rotate_copy_result, partial_sort_copy_result): Change into an alias of
6464         in_out_result.
6465         (in_out_out_result): New.
6466         (partition_copy_result, merge_result): Change into an alias of
6467         in_out_out_result.
6468         (set_union_result, set_intersection_result): Change into an alias of
6469         in_in_out_result.
6470         (set_difference_result): Change into an alias of in_out_result.
6471         (set_symmetric_difference): Change into an alias of in_in_out_result.
6472         (min_max_result): New.
6473         (minmax_result, minmax_element_result): Change into an alias of
6474         min_max_result.
6475         (in_found_result): New.
6476         (next_permutation_result, prev_permutation_result): Change into an alias
6477         of in_found_result.
6478         (__next_permutation_fn::operator(), __prev_permutation_fn::operator()):
6479         Adjust following changes to next_permutation_result and
6480         prev_permutation_result.
6481         * include/bits/ranges_algobase.h (in_out_result): New.
6482         (copy_result, move_result, move_backward_result, copy_backward_result,
6483         copy_n_result): Change into an alias of in_out_result.
6484         * include/bits/ranges_uninitialized.h (uninitialized_copy_result,
6485         uninitialized_copy_n_result, uninitialized_move_result,
6486         uninitialized_move_n_result): Likewise.
6487         * testsuite/25_algorithms/next_permutation/constrained.cc: Adjust uses of
6488         structured bindings.
6489         * testsuite/25_algorithms/prev_permutation/constrained.cc: Likewise.
6490
6491         P1243R4 Rangify new algorithms
6492         * include/bits/ranges_algo.h (for_each_n_result, __for_each_n_fn,
6493         for_each_n, __sample_fn, sample, __clamp_fn, clamp): New.
6494         * testsuite/25_algorithms/clamp/constrained.cc: New test.
6495         * testsuite/25_algorithms/for_each/constrained.cc: Augment test.
6496         * testsuite/25_algorithms/sample/constrained.cc: New test.
6497
6498 2020-02-17  Jonathan Wakely  <jwakely@redhat.com>
6499
6500         P1964R2 Wording for boolean-testable
6501         * include/bits/ranges_algo.h (__find_fn, __find_first_of_fn)
6502         (__adjacent_find_fn): Cast result of predicate to bool.
6503         * include/std/concepts (__boolean): Remove.
6504         (__detail::__boolean_testable_impl, __detail::__boolean_testable): Add
6505         new helper concepts.
6506         (__detail::__weakly_eq_cmp_with, totally_ordered, totally_ordered_with)
6507         (predicate): Use __boolean_testable instead of boolean.
6508         * libsupc++/compare (__detail::__partially_ordered, _Synth3way):
6509         Likewise.
6510
6511         P1970R2 Consistency for size() functions: Add ranges::ssize
6512         * include/bits/range_access.h (_SSize, ssize): Define for C++20.
6513         * testsuite/std/ranges/access/ssize.cc: New test.
6514
6515         P1956R1 On the names of low-level bit manipulation functions
6516         * include/bits/hashtable_policy.h: Update comment.
6517         * include/std/bit (__ispow2, __ceil2, __floor2, __log2p1): Rename.
6518         (ispow2, ceil2, floor2, log2p1): Likewise.
6519         (__cpp_lib_int_pow2): Add feature test macro.
6520         * include/std/charconv (__to_chars_len_2): Adjust use of __log2p1.
6521         * include/std/memory (assume_aligned): Adjust use of ispow2.
6522         * include/std/version (__cpp_lib_int_pow2): Add.
6523         * libsupc++/new_opa.cc: Adjust use of __ispow2.
6524         * src/c++17/memory_resource.cc: Likewise, and for __ceil2 and __log2p1.
6525         * testsuite/17_intro/freestanding.cc: Adjust use of ispow2.
6526         * testsuite/26_numerics/bit/bit.pow.two/ceil2.cc: Rename to ...
6527         * testsuite/26_numerics/bit/bit.pow.two/bit_ceil.cc: ... here.
6528         * testsuite/26_numerics/bit/bit.pow.two/ceil2_neg.cc: Rename to ...
6529         * testsuite/26_numerics/bit/bit.pow.two/bit_ceil_neg.cc: ... here.
6530         * testsuite/26_numerics/bit/bit.pow.two/floor2.cc: Rename to ...
6531         * testsuite/26_numerics/bit/bit.pow.two/bit_floor.cc: ... here.
6532         * testsuite/26_numerics/bit/bit.pow.two/log2p1.cc: Rename to ...
6533         * testsuite/26_numerics/bit/bit.pow.two/bit_width.cc: ... here.
6534         * testsuite/26_numerics/bit/bit.pow.two/ispow2.cc: Rename to ...
6535         * testsuite/26_numerics/bit/bit.pow.two/has_single_bit.cc: ... here.
6536
6537         * include/std/charconv: Add comment.
6538
6539         PR libstdc++/92546 (partial)
6540         * include/bits/random.h (uniform_random_bit_generator): Move definition
6541         to <bits/uniform_int_dist.h>.
6542         * include/bits/ranges_algo.h: Include <bits/uniform_int_dist.h> instead
6543         of <bits/random.h>.
6544         * include/bits/ranges_algobase.h: Do not include <cmath>.
6545         * include/bits/uniform_int_dist.h (uniform_random_bit_generator):
6546         Move here.
6547         * include/std/ranges: Do not include <limits>.
6548         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error lineno.
6549
6550         PR libstdc++/92546 (partial)
6551         * include/Makefile.am: Add new header.
6552         * include/Makefile.in: Regenerate.
6553         * include/bits/int_limits.h: New header.
6554         * include/bits/parse_numbers.h (__select_int::_Select_int): Replace
6555         numeric_limits with __detail::__int_limits.
6556         * include/std/bit (__rotl, __rotr, __countl_zero, __countl_one)
6557         (__countr_zero, __countr_one, __popcount, __ceil2, __floor2, __log2p1):
6558         Likewise.
6559         * include/std/charconv (__to_chars_8, __from_chars_binary)
6560         (__from_chars_alpha_to_num, from_chars): Likewise.
6561         * include/std/memory_resource (polymorphic_allocator::allocate)
6562         (polymorphic_allocator::allocate_object): Likewise.
6563         * include/std/string_view (basic_string_view::_S_compare): Likewise.
6564         * include/std/utility (in_range): Likewise.
6565         * testsuite/20_util/integer_comparisons/in_range_neg.cc: Adjust for
6566         extra error about incomplete type __int_limits<bool>.
6567         * testsuite/26_numerics/bit/bit.count/countl_one.cc: Include <limits>.
6568         * testsuite/26_numerics/bit/bit.count/countl_zero.cc: Likewise.
6569         * testsuite/26_numerics/bit/bit.count/countr_one.cc: Likewise.
6570         * testsuite/26_numerics/bit/bit.count/countr_zero.cc: Likewise.
6571         * testsuite/26_numerics/bit/bit.count/popcount.cc: Likewise.
6572         * testsuite/26_numerics/bit/bit.pow.two/ceil2_neg.cc: Likewise.
6573         * testsuite/26_numerics/bit/bit.pow.two/ceil2.cc: Likewise.
6574         * testsuite/26_numerics/bit/bit.pow.two/floor2.cc: Likewise.
6575         * testsuite/26_numerics/bit/bit.pow.two/ispow2.cc: Likewise.
6576         * testsuite/26_numerics/bit/bit.pow.two/log2p1.cc: Likewise.
6577         * testsuite/26_numerics/bit/bit.rotate/rotl.cc: Likewise.
6578         * testsuite/26_numerics/bit/bit.rotate/rotr.cc: Likewise.
6579
6580         * python/libstdcxx/v6/printers.py (StdCmpCatPrinter.to_string): Update
6581         value for partial_ordering::unordered.
6582
6583         * include/bits/iterator_concepts.h (indirectly_copyable_storable): Add
6584         const-qualified expression variations.
6585         * include/std/concepts (copyable): Likewise.
6586
6587         * include/std/type_traits (__is_standard_integer): New helper trait.
6588         * include/std/utility (cmp_equal, cmp_not_equal, cmp_less, cmp_greater)
6589         (cmp_less_equal, cmp_greater_equal, in_range): Define for C++20.
6590         * include/std/version (__cpp_lib_integer_comparison_functions): Define.
6591         * testsuite/20_util/integer_comparisons/1.cc: New test.
6592         * testsuite/20_util/integer_comparisons/2.cc: New test.
6593         * testsuite/20_util/integer_comparisons/equal.cc: New test.
6594         * testsuite/20_util/integer_comparisons/equal_neg.cc: New test.
6595         * testsuite/20_util/integer_comparisons/greater_equal.cc: New test.
6596         * testsuite/20_util/integer_comparisons/greater_equal_neg.cc: New test.
6597         * testsuite/20_util/integer_comparisons/greater_neg.cc: New test.
6598         * testsuite/20_util/integer_comparisons/in_range.cc: New test.
6599         * testsuite/20_util/integer_comparisons/in_range_neg.cc: New test.
6600         * testsuite/20_util/integer_comparisons/less.cc: New test.
6601         * testsuite/20_util/integer_comparisons/less_equal.cc: New test.
6602         * testsuite/20_util/integer_comparisons/less_equal_neg.cc: New test.
6603         * testsuite/20_util/integer_comparisons/less_neg.cc: New test.
6604         * testsuite/20_util/integer_comparisons/not_equal.cc: New test.
6605         * testsuite/20_util/integer_comparisons/not_equal_neg.cc: New test.
6606
6607 2020-02-16  Patrick Palka  <ppalka@redhat.com>
6608
6609         * include/bits/ranges_algo.h (__lexicographical_compare_fn::operator()):
6610         Move code after an early exit constexpr if to under an else branch.
6611         * include/bits/ranges_algobase.h (__equal_fn::operator()): Likewise.
6612
6613 2020-02-15  Patrick Palka  <ppalka@redhat.com>
6614
6615         * include/bits/ranges_algo.h: Adjust whitespace and formatting.
6616         * include/bits/ranges_algobase.h: Likewise.
6617         * include/bits/ranges_uninitialized.h: Likewise.
6618
6619         * include/bits/ranges_algo.h: (adjacent_find, all_of, any_of,
6620         binary_search, copy_if, count, count_if, equal_range, find, find_end,
6621         find_first_of, find_if, find_if_not, for_each, generate, generate_n,
6622         includes, inplace_merge, is_heap, is_heap_until, is_partitioned,
6623         is_permutation, is_sorted, is_sorted_until, lexicographical_compare,
6624         lower_bound, make_heap, max, max_element, merge, min, min_element,
6625         minmax, minmax_element, mismatch, next_permutation, none_of,
6626         nth_element, partial_sort, partial_sort_copy, partition, partition_copy,
6627         partition_point, pop_heap, prev_permutation, push_heap, remove,
6628         remove_copy, remove_copy_if, remove_if, replace, replace_copy,
6629         replace_copy_if, replace_if, reverse, reverse_copy, rotate, rotate_copy,
6630         search, search_n, set_difference, set_intersection,
6631         set_symmetric_difference, set_union, shuffle, sort, sort_heap,
6632         stable_partition, stable_sort, swap_ranges, transform, unique,
6633         unique_copy, upper_bound): Convert into function objects.
6634         * include/bits/ranges_algobase.h: (equal, copy, move, copy_n, fill_n,
6635         fill, move_backward, copy_backward): Likewise.
6636         * include/bits/ranges_uninitialized.h (uninitialized_default_construct,
6637         uninitialized_default_construct_n, uninitialized_value_construct,
6638         uninitialized_value_construct_n, uninitialized_copy,
6639         uninitialized_copy_n, uninitialized_move, uninitialized_move_n,
6640         uninitialized_fill, uninitialized_fill_n, construct_at, destroy_at,
6641         destroy, destroy_n): Likewise.
6642
6643         * include/bits/ranges_algo.h (ranges::__find_end): Fold into ...
6644         (ranges::find_end): ... here.
6645         (ranges::__lexicographical_compare): Fold into ...
6646         (ranges::lexicographical_compare): ... here.
6647         * include/bits/ranges_algobase.h (ranges::__equal): Fold into ...
6648         (ranges::equal): ... here.
6649
6650 2020-02-15  Jonathan Wakely  <jwakely@redhat.com>
6651
6652         * include/bits/erase_if.h (__cpp_lib_erase_if): Define to 202002L.
6653         * include/std/deque: Likewise.
6654         * include/std/forward_list: Likewise.
6655         * include/std/list: Likewise.
6656         * include/std/string: Likewise.
6657         * include/std/vector: Likewise.
6658         * include/std/version: Likewise.
6659         * testsuite/23_containers/deque/erasure.cc: Test for new value.
6660         * testsuite/23_containers/forward_list/erasure.cc: Likewise.
6661         * testsuite/23_containers/list/erasure.cc: Likewise.
6662         * testsuite/23_containers/map/erasure.cc: Likewise.
6663         * testsuite/23_containers/set/erasure.cc: Likewise.
6664         * testsuite/23_containers/unordered_map/erasure.cc: Likewise.
6665         * testsuite/23_containers/unordered_set/erasure.cc: Likewise.
6666         * testsuite/23_containers/vector/erasure.cc: Likewise.
6667
6668 2020-02-15  Jonathan Wakely  <jwakely@redhat.com>
6669
6670         * include/bits/random.h (uniform_random_bit_generator): Require min()
6671         and max() to be constant expressions and min() to be less than max().
6672         * testsuite/26_numerics/random/concept.cc: Check additional cases.
6673         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error lineno.
6674
6675 2020-02-13  Patrick Palka  <ppalka@redhat.com>
6676
6677         * include/Makefile.am: Add <bits/ranges_uninitialized.h>.
6678         * include/Makefile.in: Regenerate.
6679         * include/bits/ranges_uninitialized.h: New header.
6680         * include/std/memory: Include it.
6681         * testsuite/20_util/specialized_algorithms/destroy/constrained.cc: New
6682         test.
6683         * .../uninitialized_copy/constrained.cc: New test.
6684         * .../uninitialized_default_construct/constrained.cc: New test.
6685         * .../uninitialized_fill/constrained.cc: New test.
6686         * .../uninitialized_move/constrained.cc: New test.
6687         * .../uninitialized_value_construct/constrained.cc: New test.
6688
6689         * include/Makefile.am: Add bits/ranges_algobase.h
6690         * include/Makefile.in: Regenerate.
6691         * bits/ranges_algo.h: Include <bits/ranges_algobase.h> and refactor
6692         existing #includes.
6693         (__detail::__is_normal_iterator, __detail::is_reverse_iterator,
6694         __detail::__is_move_iterator, copy_result, move_result,
6695         __equal, equal, copy_result, move_result, move_backward_result,
6696         copy_backward_result, __copy_or_move_backward, __copy_or_move, copy,
6697         move, copy_backward, move_backward, copy_n_result, copy_n, fill_n,
6698         fill): Split out into ...
6699         * bits/range_algobase.h: ... this new header.
6700
6701 2020-02-12  Patrick Palka  <ppalka@redhat.com>
6702
6703         LWG 3389 and LWG 3390
6704         * include/bits/stl_iterator.h (move_move_iterator): Use std::move when
6705         constructing the move_iterator with __i.
6706         (counted_iterator::counted_iterator): Use std::move when initializing
6707         M_current with __i.
6708         * testsuite/24_iterators/counted_iterator/lwg3389.cc: New test.
6709         * testsuite/24_iterators/move_iterator/lwg3390.cc: New test.
6710
6711 2020-02-12  Sandra Loosemore  <sandra@codesourcery.com>
6712
6713         PR libstdc++/79193
6714         PR libstdc++/88999
6715
6716         * configure: Regenerated.
6717
6718 2020-02-12  François Dumont  <fdumont@gcc.gnu.org>
6719
6720         * include/bits/hashtable.h
6721         (_Hashtable<>(_Hashtable&&, std::allocator_type&)): Add
6722         missing std namespace qualification to forward call.
6723
6724 2020-02-09  Jonathan Wakely  <jwakely@redhat.com>
6725
6726         * testsuite/20_util/function_objects/range.cmp/equal_to.cc: Fix
6727         comment.
6728         * testsuite/20_util/function_objects/range.cmp/less.ccL Likewise.
6729
6730         * include/std/ranges: Fix non-ASCII characters in comment.
6731
6732         * include/bits/range_cmp.h (__detail::__eq_builtin_ptr_cmp): Require
6733         equality comparison to be valid and return bool.
6734         (__detail::__less_builtin_ptr_cmp): Likewise for less-than comparison.
6735         * testsuite/20_util/function_objects/range.cmp/equal_to.cc: Check
6736         type with ambiguous conversion to fundamental types.
6737         * testsuite/20_util/function_objects/range.cmp/less.cc: Likewise.
6738
6739 2020-02-07  Jonathan Wakely  <jwakely@redhat.com>
6740
6741         * include/bits/iterator_concepts.h (iter_difference_t, iter_value_t):
6742         Use remove_cvref_t.
6743         (readable_traits): Rename to indirectly_readable_traits.
6744         (readable): Rename to indirectly_readable.
6745         (writable): Rename to indirectly_writable.
6746         (__detail::__iter_exchange_move): Do not use remove_reference_t.
6747         (indirectly_swappable): Adjust requires expression parameter types.
6748         expression.
6749         * include/bits/ranges_algo.h (ranges::transform, ranges::replace)
6750         (ranges::replace_if, ranges::generate_n, ranges::generate)
6751         (ranges::remove): Use new name for writable.
6752         * include/bits/stl_iterator.h (__detail::__common_iter_has_arrow):
6753         Use new name for readable.
6754         * include/ext/pointer.h (readable_traits<_Pointer_adapter<P>>): Use
6755         new name for readable_traits.
6756         * testsuite/24_iterators/associated_types/readable.traits.cc: Likewise.
6757         * testsuite/24_iterators/indirect_callable/projected.cc: Adjust for
6758         new definition of indirectly_readable.
6759
6760         * include/bits/stl_iterator.h (__detail::__common_iter_ptr): Change
6761         to take parameters of common_iterator, instead of the common_iterator
6762         type itself. Fix argument for __common_iter_has_arrow constraint.
6763         (iterator_traits<common_iterator<I, S>>::pointer): Adjust.
6764
6765 2020-02-07  Jonathan Wakely  <jwakely@redhat.com>
6766
6767         * include/std/ranges (iota_view): Add braces to prevent -Wempty-body
6768         warning.
6769         (basic_istream_view::_Iterator::operator++()): Add missing return.
6770
6771 2020-02-07  Patrick Palka  <ppalka@redhat.com>
6772
6773         * include/bits/ranges_algo.h: Remove extraneous &&.
6774
6775         * include/std/ranges (ranges::__detail::__stream_extractable,
6776         ranges::basic_istream_view, ranges::istream_view): Define.
6777         * testsuite/std/ranges/istream_view: New test.
6778
6779         Implement C++20 range adaptors
6780         * include/std/ranges: Include <bits/refwrap.h> and <tuple>.
6781         (subrange::_S_store_size): Mark as const instead of constexpr to
6782         avoid what seems to be a bug in GCC.
6783         (__detail::__box): Give it defaulted copy and move constructors.
6784         (ranges::views::_Single::operator()): Mark constexpr.
6785         (ranges::views::_Iota::operator()): Mark constexpr.
6786         (__detail::Empty): Define.
6787         (ranges::views::__closure::_RangeAdaptor,
6788         ranges::views::__closure::_RangeAdaptorClosure, ref_view, all_view,
6789         ranges::views::all, ranges::__detail::find_if,
6790         ranges::__detail::find_if_not, ranges::__detail::mismatch,
6791         ranges::detail::min, filter_view, ranges::views::filter, transform_view,
6792         ranges::views::transform, take_view, ranges::views::take,
6793         take_while_view, ranges::views::take_while, drop_view,
6794         ranges::views::drop, join_view, ranges::views::join,
6795         __detail::require_constant, __detail::tiny_range, split_view,
6796         ranges::views::split, ranges::views::_Counted, ranges::views::counted,
6797         common_view, ranges::views::common, reverse_view,
6798         ranges::views::reverse,
6799         ranges::views::__detail::__is_reversible_subrange,
6800         ranges::views::__detail::__is_reverse_view, reverse_view,
6801         ranges::views::reverse, __detail::__has_tuple_element, elements_view,
6802         ranges::views::elements, ranges::views::keys, ranges::views::values):
6803         Define.
6804         (views): Alias for ranges::views.
6805         (tuple_size<ranges::subrange<>>, tuple_element<0, ranges::subrange>,
6806         tuple_element<1, ranges::subrange>): New partial specializations.
6807         * testsuite/std/ranges/adaptors/all.cc: New test.
6808         * testsuite/std/ranges/adaptors/common.cc: Likewise.
6809         * testsuite/std/ranges/adaptors/counted.cc: Likewise.
6810         * testsuite/std/ranges/adaptors/drop.cc: Likewise.
6811         * testsuite/std/ranges/adaptors/drop_while.cc: Likewise.
6812         * testsuite/std/ranges/adaptors/elements.cc: Likewise.
6813         * testsuite/std/ranges/adaptors/filter.cc: Likewise.
6814         * testsuite/std/ranges/adaptors/join.cc: Likewise.
6815         * testsuite/std/ranges/adaptors/reverse.cc: Likewise.
6816         * testsuite/std/ranges/adaptors/split.cc: Likewise.
6817         * testsuite/std/ranges/adaptors/take.cc: Likewise.
6818         * testsuite/std/ranges/adaptors/take_while.cc: Likewise.
6819         * testsuite/std/ranges/adaptors/transform.cc: Likewise.
6820
6821 2020-02-07  Jonathan Wakely  <jwakely@redhat.com>
6822
6823         * libsupc++/compare (__cmp_cat::type): Define typedef for underlying
6824         type of enumerations and comparison category types.
6825         (__cmp_cat::_Ord, __cmp_cat::_Ncmp): Add underlying type.
6826         (__cmp_cat::_Ncmp::unordered): Change value to 2.
6827         (partial_ordering::_M_value, weak_ordering::_M_value)
6828         (strong_ordering::_M_value): Change type to __cmp_cat::type.
6829         (partial_ordering::_M_is_ordered): Remove data member.
6830         (partial_ordering): Use second bit of _M_value for unordered. Adjust
6831         comparison operators.
6832         (weak_ordering::operator partial_ordering): Simplify to remove
6833         branches.
6834         (operator<=>(unspecified, weak_ordering)): Likewise.
6835         (strong_ordering::operator partial_ordering): Likewise.
6836         (strong_ordering::operator weak_ordering): Likewise.
6837         (operator<=>(unspecified, strong_ordering)): Likewise.
6838         * testsuite/18_support/comparisons/categories/partialord.cc: New test.
6839         * testsuite/18_support/comparisons/categories/strongord.cc: New test.
6840         * testsuite/18_support/comparisons/categories/weakord.cc: New test.
6841
6842         * include/std/ranges (iota_view::_Iterator): Fix typo in name of
6843         __cpp_lib_three_way_comparison macro and use deduced return type for
6844         operator<=>.
6845         * testsuite/std/ranges/iota/iterator.cc: New test.
6846
6847 2020-02-07  Patrick Palka  <ppalka@redhat.com>
6848             Jonathan Wakely  <jwakely@redhat.com>
6849
6850         Implement C++20 constrained algorithms
6851         * include/Makefile.am: Add new header.
6852         * include/Makefile.in: Regenerate.
6853         * include/std/algorithm: Include <bits/ranges_algo.h>.
6854         * include/bits/ranges_algo.h: New file.
6855         * testsuite/25_algorithms/adjacent_find/constrained.cc: New test.
6856         * testsuite/25_algorithms/all_of/constrained.cc: New test.
6857         * testsuite/25_algorithms/any_of/constrained.cc: New test.
6858         * testsuite/25_algorithms/binary_search/constrained.cc: New test.
6859         * testsuite/25_algorithms/copy/constrained.cc: New test.
6860         * testsuite/25_algorithms/copy_backward/constrained.cc: New test.
6861         * testsuite/25_algorithms/copy_if/constrained.cc: New test.
6862         * testsuite/25_algorithms/copy_n/constrained.cc: New test.
6863         * testsuite/25_algorithms/count/constrained.cc: New test.
6864         * testsuite/25_algorithms/count_if/constrained.cc: New test.
6865         * testsuite/25_algorithms/equal/constrained.cc: New test.
6866         * testsuite/25_algorithms/equal_range/constrained.cc: New test.
6867         * testsuite/25_algorithms/fill/constrained.cc: New test.
6868         * testsuite/25_algorithms/fill_n/constrained.cc: New test.
6869         * testsuite/25_algorithms/find/constrained.cc: New test.
6870         * testsuite/25_algorithms/find_end/constrained.cc: New test.
6871         * testsuite/25_algorithms/find_first_of/constrained.cc: New test.
6872         * testsuite/25_algorithms/find_if/constrained.cc: New test.
6873         * testsuite/25_algorithms/find_if_not/constrained.cc: New test.
6874         * testsuite/25_algorithms/for_each/constrained.cc: New test.
6875         * testsuite/25_algorithms/generate/constrained.cc: New test.
6876         * testsuite/25_algorithms/generate_n/constrained.cc: New test.
6877         * testsuite/25_algorithms/heap/constrained.cc: New test.
6878         * testsuite/25_algorithms/includes/constrained.cc: New test.
6879         * testsuite/25_algorithms/inplace_merge/constrained.cc: New test.
6880         * testsuite/25_algorithms/is_partitioned/constrained.cc: New test.
6881         * testsuite/25_algorithms/is_permutation/constrained.cc: New test.
6882         * testsuite/25_algorithms/is_sorted/constrained.cc: New test.
6883         * testsuite/25_algorithms/is_sorted_until/constrained.cc: New test.
6884         * testsuite/25_algorithms/lexicographical_compare/constrained.cc: New
6885         test.
6886         * testsuite/25_algorithms/lower_bound/constrained.cc: New test.
6887         * testsuite/25_algorithms/max/constrained.cc: New test.
6888         * testsuite/25_algorithms/max_element/constrained.cc: New test.
6889         * testsuite/25_algorithms/merge/constrained.cc: New test.
6890         * testsuite/25_algorithms/min/constrained.cc: New test.
6891         * testsuite/25_algorithms/min_element/constrained.cc: New test.
6892         * testsuite/25_algorithms/minmax/constrained.cc: New test.
6893         * testsuite/25_algorithms/minmax_element/constrained.cc: New test.
6894         * testsuite/25_algorithms/mismatch/constrained.cc: New test.
6895         * testsuite/25_algorithms/move/constrained.cc: New test.
6896         * testsuite/25_algorithms/move_backward/constrained.cc: New test.
6897         * testsuite/25_algorithms/next_permutation/constrained.cc: New test.
6898         * testsuite/25_algorithms/none_of/constrained.cc: New test.
6899         * testsuite/25_algorithms/nth_element/constrained.cc: New test.
6900         * testsuite/25_algorithms/partial_sort/constrained.cc: New test.
6901         * testsuite/25_algorithms/partial_sort_copy/constrained.cc: New test.
6902         * testsuite/25_algorithms/partition/constrained.cc: New test.
6903         * testsuite/25_algorithms/partition_copy/constrained.cc: New test.
6904         * testsuite/25_algorithms/partition_point/constrained.cc: New test.
6905         * testsuite/25_algorithms/prev_permutation/constrained.cc: New test.
6906         * testsuite/25_algorithms/remove/constrained.cc: New test.
6907         * testsuite/25_algorithms/remove_copy/constrained.cc: New test.
6908         * testsuite/25_algorithms/remove_copy_if/constrained.cc: New test.
6909         * testsuite/25_algorithms/remove_if/constrained.cc: New test.
6910         * testsuite/25_algorithms/replace/constrained.cc: New test.
6911         * testsuite/25_algorithms/replace_copy/constrained.cc: New test.
6912         * testsuite/25_algorithms/replace_copy_if/constrained.cc: New test.
6913         * testsuite/25_algorithms/replace_if/constrained.cc: New test.
6914         * testsuite/25_algorithms/reverse/constrained.cc: New test.
6915         * testsuite/25_algorithms/reverse_copy/constrained.cc: New test.
6916         * testsuite/25_algorithms/rotate/constrained.cc: New test.
6917         * testsuite/25_algorithms/rotate_copy/constrained.cc: New test.
6918         * testsuite/25_algorithms/search/constrained.cc: New test.
6919         * testsuite/25_algorithms/search_n/constrained.cc: New test.
6920         * testsuite/25_algorithms/set_difference/constrained.cc: New test.
6921         * testsuite/25_algorithms/set_intersection/constrained.cc: New test.
6922         * testsuite/25_algorithms/set_symmetric_difference/constrained.cc: New
6923         test.
6924         * testsuite/25_algorithms/set_union/constrained.cc: New test.
6925         * testsuite/25_algorithms/shuffle/constrained.cc: New test.
6926         * testsuite/25_algorithms/sort/constrained.cc: New test.
6927         * testsuite/25_algorithms/stable_partition/constrained.cc: New test.
6928         * testsuite/25_algorithms/stable_sort/constrained.cc: New test.
6929         * testsuite/25_algorithms/swap_ranges/constrained.cc: New test.
6930         * testsuite/25_algorithms/transform/constrained.cc: New test.
6931         * testsuite/25_algorithms/unique/constrained.cc: New test.
6932         * testsuite/25_algorithms/unique_copy/constrained.cc: New test.
6933         * testsuite/25_algorithms/upper_bound/constrained.cc: New test.
6934
6935 2020-02-06  Jonathan Wakely  <jwakely@redhat.com>
6936
6937         * include/bits/stl_iterator.h (__detail::__common_iter_ptr): Fix PR
6938         number in comment. Fix indentation.
6939
6940         * include/bits/stl_algobase.h (__iter_swap, __iter_swap<true>): Remove
6941         redundant _GLIBCXX20_CONSTEXPR.
6942
6943         * include/std/ranges (viewable_range): Replace decay_t with
6944         remove_cvref_t (LWG 3375).
6945
6946 2020-02-05  Jonathan Wakely  <jwakely@redhat.com>
6947
6948         * include/bits/iterator_concepts.h (iter_reference_t)
6949         (iter_rvalue_reference_t, iter_common_reference_t, indirect_result_t):
6950         Remove workarounds for PR c++/67704.
6951         * testsuite/24_iterators/aliases.cc: New test.
6952
6953 2020-02-05  Patrick Palka  <ppalka@redhat.com>
6954
6955         * include/bits/stl_iterator.h (move_iterator::move_iterator): Move __i
6956         when initializing _M_current.
6957         (move_iterator::base): Split into two overloads differing in
6958         ref-qualifiers as in P1207R4 for C++20.
6959
6960 2020-02-04  Jonathan Wakely  <jwakely@redhat.com>
6961
6962         * include/std/functional (_GLIBCXX_NOT_FN_CALL_OP): Un-define after
6963         use.
6964
6965         PR libstdc++/93562
6966         * include/bits/unique_ptr.h (__uniq_ptr_impl::swap): Define.
6967         (unique_ptr::swap, unique_ptr<T[], D>::swap): Call it.
6968         * testsuite/20_util/unique_ptr/modifiers/93562.cc: New test.
6969
6970 2020-02-01  Andrew Burgess  <andrew.burgess@embecosm.com>
6971
6972         * configure: Regenerate.
6973
6974 2020-01-31  Patrick Palka  <ppalka@redhat.com>
6975
6976         * testsuite/24_iterators/range_operations/distance.cc: Do not assume
6977         test_range::end() returns the same type as test_range::begin().
6978         * testsuite/24_iterators/range_operations/next.cc: Likewise.
6979         * testsuite/24_iterators/range_operations/prev.cc: Likewise.
6980         * testsuite/util/testsuite_iterators.h (__gnu_test::test_range::end):
6981         Always return a sentinel<I>.
6982
6983 2020-01-29  Jonathan Wakely  <jwakely@redhat.com>
6984
6985         PR libstdc++/92895
6986         * include/std/stop_token (stop_token::stop_possible()): Call new
6987         _M_stop_possible() function.
6988         (stop_token::stop_requested()): Do not use stop_possible().
6989         (stop_token::binary_semaphore): New class, as temporary stand-in for
6990         std::binary_semaphore.
6991         (stop_token::_Stop_cb::_M_callback): Add noexcept to type.
6992         (stop_token::_Stop_cb::_M_destroyed, stop_token::_Stop_cb::_M_done):
6993         New data members for symchronization with stop_callback destruction.
6994         (stop_token::_Stop_cb::_Stop_cb): Make non-template.
6995         (stop_token::_Stop_cb::_M_linked, stop_token::_Stop_cb::_S_execute):
6996         Remove.
6997         (stop_token::_Stop_cb::_M_run): New member function.
6998         (stop_token::_Stop_state::_M_stopped, stop_token::_Stop_state::_M_mtx):
6999         Remove.
7000         (stop_token::_Stop_state::_M_owners): New data member to track
7001         reference count for ownership.
7002         (stop_token::_Stop_state::_M_value): New data member combining a
7003         spinlock, the stop requested flag, and the reference count for
7004         associated stop_source objects.
7005         (stop_token::_Stop_state::_M_requester): New data member for
7006         synchronization with stop_callback destruction.
7007         (stop_token::_Stop_state::_M_stop_possible()): New member function.
7008         (stop_token::_Stop_state::_M_stop_requested()): Inspect relevant bit
7009         of _M_value.
7010         (stop_token::_Stop_state::_M_add_owner)
7011         (stop_token::_Stop_state::_M_release_ownership)
7012         (stop_token::_Stop_state::_M_add_ssrc)
7013         (stop_token::_Stop_state::_M_sub_ssrc): New member functions for
7014         updating reference counts.
7015         (stop_token::_Stop_state::_M_lock, stop_token::_Stop_state::_M_unlock)
7016         (stop_token::_Stop_state::_M_lock, stop_token::_Stop_state::_M_unlock)
7017         (stop_token::_Stop_state::_M_try_lock)
7018         (stop_token::_Stop_state::_M_try_lock_and_stop)
7019         (stop_token::_Stop_state::_M_do_try_lock): New member functions for
7020         managing spinlock.
7021         (stop_token::_Stop_state::_M_request_stop): Use atomic operations to
7022         read and update state. Release lock while running callbacks. Use new
7023         data members to synchronize with callback destruction.
7024         (stop_token::_Stop_state::_M_remove_callback): Likewise.
7025         (stop_token::_Stop_state::_M_register_callback): Use atomic operations
7026         to read and update state.
7027         (stop_token::_Stop_state_ref): Handle type to manage _Stop_state,
7028         replacing shared_ptr.
7029         (stop_source::stop_source(const stop_source&)): Update reference count.
7030         (stop_source::operator=(const stop_source&)): Likewise.
7031         (stop_source::~stop_source()): Likewise.
7032         (stop_source::stop_source(stop_source&&)): Define as defaulted.
7033         (stop_source::operator=(stop_source&&)): Establish postcondition on
7034         parameter.
7035         (stop_callback): Enforce preconditions on template parameter. Replace
7036         base class with data member of new _Cb_impl type.
7037         (stop_callback::stop_callback(const stop_token&, Cb&&))
7038         (stop_callback::stop_callback(stop_token&&, Cb&&)): Fix TOCTTOU race.
7039         (stop_callback::_Cb_impl): New type wrapping _Callback member and
7040         defining the _S_execute member function.
7041         * testsuite/30_threads/stop_token/stop_callback/deadlock-mt.cc: New
7042         test.
7043         * testsuite/30_threads/stop_token/stop_callback/deadlock.cc: New test.
7044         * testsuite/30_threads/stop_token/stop_callback/destroy.cc: New test.
7045         * testsuite/30_threads/stop_token/stop_callback/destructible_neg.cc:
7046         New test.
7047         * testsuite/30_threads/stop_token/stop_callback/invocable_neg.cc: New
7048         test.
7049         * testsuite/30_threads/stop_token/stop_callback/invoke.cc: New test.
7050         * testsuite/30_threads/stop_token/stop_source/assign.cc: New test.
7051         * testsuite/30_threads/stop_token/stop_token/stop_possible.cc: New
7052         test.
7053
7054         * libsupc++/compare (__detail::__3way_builtin_ptr_cmp): Use
7055         three_way_comparable_with.
7056         (__detail::__3way_cmp_with): Remove workaround for fixed bug.
7057         (compare_three_way::operator()): Remove redundant constraint from
7058         requires-clause.
7059         (__detail::_Synth3way::operator()): Use three_way_comparable_with
7060         instead of workaround.
7061         * testsuite/18_support/comparisons/object/93479.cc: Prune extra
7062         output due to simplified constraints on compare_three_way::operator().
7063
7064         PR libstdc++/93479
7065         * libsupc++/compare (__3way_builtin_ptr_cmp): Require <=> to be valid.
7066         * testsuite/18_support/comparisons/object/93479.cc: New test.
7067
7068         * testsuite/std/ranges/access/end.cc: Do not assume test_range::end()
7069         returns the same type as test_range::begin(). Add comments.
7070         * testsuite/std/ranges/access/rbegin.cc: Likewise.
7071         * testsuite/std/ranges/access/rend.cc: Likewise.
7072         * testsuite/std/ranges/range.cc: Do not assume the sentinel for
7073         test_range is the same as its iterator type.
7074         * testsuite/util/testsuite_iterators.h (test_range::sentinel): Add
7075         operator- overloads to satisfy sized_sentinel_for when the iterator
7076         satisfies random_access_iterator.
7077
7078 2020-01-28  Jonathan Wakely  <jwakely@redhat.com>
7079
7080         PR libstdc++/93470
7081         * include/bits/refwrap.h (reference_wrapper::operator()): Restrict
7082         static assertion to object types.
7083
7084         PR libstdc++/93325
7085         * acinclude.m4 (GLIBCXX_ENABLE_LIBSTDCXX_TIME): Use AC_SEARCH_LIBS for
7086         clock_gettime instead of explicit glibc version check.
7087         * configure: Regenerate.
7088
7089 2020-01-28  Martin Liska  <mliska@suse.cz>
7090
7091         PR libstdc++/93478
7092         * include/std/atomic: Fix typo.
7093         * include/std/optional: Likewise.
7094
7095 2020-01-27  Andrew Burgess  <andrew.burgess@embecosm.com>
7096
7097         * configure: Regenerate.
7098
7099 2020-01-27  Jonathan Wakely  <jwakely@redhat.com>
7100
7101         PR libstdc++/93426
7102         * include/std/span (span): Fix deduction guide.
7103         * testsuite/23_containers/span/deduction.cc: New test.
7104
7105 2020-01-24  Jonathan Wakely  <jwakely@redhat.com>
7106
7107         * libsupc++/compare (__cmp_cat::_Eq): Remove enumeration type.
7108         (__cmp_cat::_Ord::equivalent): Add enumerator.
7109         (__cmp_cat::_Ord::_Less, __cmp_cat::_Ord::_Greater): Rename to less
7110         and greater.
7111         (partial_ordering, weak_ordering, strong_ordering): Remove
7112         constructors taking __cmp_cat::_Eq parameters. Use renamed
7113         enumerators.
7114
7115 2020-01-24  Maciej W. Rozycki  <macro@wdc.com>
7116
7117         * acinclude.m4: Handle `--with-toolexeclibdir='.
7118         * Makefile.in: Regenerate.
7119         * aclocal.m4: Regenerate.
7120         * configure: Regenerate.
7121         * doc/Makefile.in: Regenerate.
7122         * include/Makefile.in: Regenerate.
7123         * libsupc++/Makefile.in: Regenerate.
7124         * po/Makefile.in: Regenerate.
7125         * python/Makefile.in: Regenerate.
7126         * src/Makefile.in: Regenerate.
7127         * src/c++11/Makefile.in: Regenerate.
7128         * src/c++17/Makefile.in: Regenerate.
7129         * src/c++98/Makefile.in: Regenerate.
7130         * src/filesystem/Makefile.in: Regenerate.
7131         * testsuite/Makefile.in: Regenerate.
7132
7133 2020-01-23  Alexandre Oliva <oliva@adacore.com>
7134
7135         * crossconfig.m4 (GLIBCXX_CHECK_MATH_DECL): Reject macros.
7136         * configure: Rebuild.
7137
7138         * testsuite/27_io/fpos/mbstate_t/1.cc: Zero-init mbstate_t.
7139
7140 2020-01-23  Jonathan Wakely  <jwakely@redhat.com>
7141
7142         PR libstdc++/91947
7143         * include/Makefile.am (${host_builddir}/largefile-config.h): Simplify
7144         rule.
7145         * include/Makefile.in: Regenerate.
7146
7147 2020-01-20  Jonathan Wakely  <jwakely@redhat.com>
7148
7149         * doc/xml/faq.xml: Fix grammar.
7150         * doc/xml/manual/appendix_contributing.xml: Improve instructions.
7151         * doc/xml/manual/spine.xml: Update copyright years.
7152         * doc/html/*: Regenerate.
7153
7154 2020-01-19  Eric S. Raymond <esr@thyrsus.com>
7155
7156         * doc/xml/faq.xml: Update for SVN -> Git transition.
7157         * doc/xml/manual/appendix_contributing.xml: Likewise.
7158         * doc/xml/manual/status_cxx1998.xml: Likewise.
7159         * doc/xml/manual/status_cxx2011.xml: Likewise.
7160         * doc/xml/manual/status_cxx2014.xml: Likewise.
7161         * doc/xml/manual/status_cxx2017.xml: Likewise.
7162         * doc/xml/manual/status_cxx2020.xml: Likewise.
7163         * doc/xml/manual/status_cxxtr1.xml: Likewise.
7164         * doc/xml/manual/status_cxxtr24733.xml: Likewise.
7165
7166 2020-01-18  Iain Sandoe  <iain@sandoe.co.uk>
7167
7168         * include/Makefile.am: Add coroutine to the std set.
7169         * include/Makefile.in: Regenerated.
7170         * include/std/coroutine: New file.
7171
7172 2020-01-17  Jonathan Wakely  <jwakely@redhat.com>
7173
7174         PR libstdc++/92376
7175         * include/bits/c++config: Only do PSTL config when the header is
7176         present, to fix freestanding.
7177         * libsupc++/new_opa.cc [!_GLIBCXX_HOSTED]: Declare allocation
7178         functions if they were detected by configure.
7179
7180 2020-01-16  Kai-Uwe Eckhardt  <kuehro@gmx.de>
7181             Matthew Bauer  <mjbauer95@gmail.com>
7182             Jonathan Wakely  <jwakely@redhat.com>
7183
7184         PR bootstrap/64271 (partial)
7185         * config/os/bsd/netbsd/ctype_base.h (ctype_base::mask): Change type
7186         to unsigned short.
7187         (ctype_base::alpha, ctype_base::digit, ctype_base::xdigit)
7188         (ctype_base::print, ctype_base::graph, ctype_base::alnum): Sync
7189         definitions with NetBSD upstream.
7190         (ctype_base::blank): Use _CTYPE_BL.
7191         * config/os/bsd/netbsd/ctype_configure_char.cc (_C_ctype_): Remove
7192         Declaration.
7193         (ctype<char>::classic_table): Use _C_ctype_tab_ instead of _C_ctype_.
7194         (ctype<char>::do_toupper, ctype<char>::do_tolower): Cast char
7195         parameters to unsigned char.
7196         * config/os/bsd/netbsd/ctype_inline.h (ctype<char>::is): Likewise.
7197
7198 2020-01-16  François Dumont  <fdumont@gcc.gnu.org>
7199
7200         PR libstdc++/91263
7201         * include/bits/hashtable.h (_Hashtable<>): Make _Equality<> friend.
7202         * include/bits/hashtable_policy.h: Include <bits/stl_algo.h>.
7203         (_Equality_base): Remove.
7204         (_Equality<>::_M_equal): Review implementation. Use
7205         std::is_permutation.
7206         * testsuite/23_containers/unordered_multiset/operators/1.cc
7207         (Hash, Equal, test02, test03): New.
7208         * testsuite/23_containers/unordered_set/operators/1.cc
7209         (Hash, Equal, test02, test03): New.
7210
7211 2020-01-15  Jonathan Wakely  <jwakely@redhat.com>
7212
7213         PR libstdc++/93267
7214         * include/bits/iterator_concepts.h (__max_diff_type, __max_size_type):
7215         Move here from <bits/range_access.h> and define using __int128 when
7216         available.
7217         (__is_integer_like, __is_signed_integer_like): Move here from
7218         <bits/range_access.h>.
7219         (weakly_incrementable): Use __is_signed_integer_like.
7220         * include/bits/range_access.h (__max_diff_type, __max_size_type)
7221         (__is_integer_like, __is_signed_integer_like): Move to
7222         <bits/iterator_concepts.h>.
7223         (__make_unsigned_like_t): Move here from <ranges>.
7224         * include/std/ranges (__make_unsigned_like_t): Move to
7225         <bits/range_access.h>.
7226         (iota_view): Replace using-directive with using-declarations.
7227         * testsuite/std/ranges/iota/93267.cc: New test.
7228         * testsuite/std/ranges/iota_view.cc: Move to new 'iota' sub-directory.
7229
7230 2020-01-13  Jonathan Wakely  <jwakely@redhat.com>
7231
7232         PR libstdc++/93244
7233         * include/bits/fs_path.h (path::generic_string<C,A>)
7234         [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Convert root-dir to forward-slash.
7235         * testsuite/27_io/filesystem/path/generic/generic_string.cc: Check
7236         root-dir is converted to forward slash in generic pathname.
7237         * testsuite/27_io/filesystem/path/generic/utf.cc: New test.
7238         * testsuite/27_io/filesystem/path/generic/wchar_t.cc: New test.
7239
7240         PR libstdc++/58605
7241         * include/bits/atomic_base.h (__cpp_lib_atomic_value_initialization):
7242         Define.
7243         (__atomic_flag_base, __atomic_base, __atomic_base<_PTp*>)
7244         (__atomic_float): Add default member initializer for C++20.
7245         * include/std/atomic (atomic): Likewise.
7246         (atomic::atomic()): Remove noexcept-specifier on default constructor.
7247         * include/std/version (__cpp_lib_atomic_value_initialization): Define.
7248         * testsuite/29_atomics/atomic/cons/assign_neg.cc: Adjust dg-error line
7249         number.
7250         * testsuite/29_atomics/atomic/cons/copy_neg.cc: Likewise.
7251         * testsuite/29_atomics/atomic/cons/value_init.cc: New test.
7252         * testsuite/29_atomics/atomic_flag/cons/value_init.cc: New test.
7253         * testsuite/29_atomics/atomic_flag/requirements/trivial.cc: Adjust
7254         expected result for is_trivially_default_constructible.
7255         * testsuite/29_atomics/atomic_float/requirements.cc: Likewise.
7256         * testsuite/29_atomics/atomic_float/value_init.cc: New test.
7257         * testsuite/29_atomics/atomic_integral/cons/assign_neg.cc: Likewise.
7258         * testsuite/29_atomics/atomic_integral/cons/copy_neg.cc: Likewise.
7259         * testsuite/29_atomics/atomic_integral/cons/value_init.cc
7260         * testsuite/29_atomics/atomic_integral/requirements/trivial.cc: Adjust
7261         expected results for is_trivially_default_constructible.
7262         * testsuite/util/testsuite_common_types.h (has_trivial_dtor): Add
7263         new test generator.
7264
7265 2020-01-10  Jonathan Wakely  <jwakely@redhat.com>
7266
7267         * testsuite/util/testsuite_iterators.h: Improve comment.
7268
7269         * testsuite/25_algorithms/equal/deque_iterators/1.cc: Don't use C++11
7270         initialization syntax.
7271
7272         PR libstdc++/92285
7273         * include/bits/streambuf_iterator.h (istreambuf_iterator): Make type
7274         of base class independent of __cplusplus value.
7275         [__cplusplus < 201103L] (istreambuf_iterator::reference): Override the
7276         type defined in the base class
7277         * testsuite/24_iterators/istreambuf_iterator/92285.cc: New test.
7278         * testsuite/24_iterators/istreambuf_iterator/requirements/
7279         base_classes.cc: Adjust expected base class for C++98.
7280
7281 2020-01-09  Olivier Hainque  <hainque@adacore.com>
7282
7283         * doc/xml/manual/appendix_contributing.xml: Document _C2
7284         as a reserved identifier, by VxWorks.
7285         * include/bits/stl_map.h: Rename _C2 template typenames as _Cmp2.
7286         * include/bits/stl_multimap.h: Likewise.
7287
7288 2020-01-09  Jonathan Wakely  <jwakely@redhat.com>
7289
7290         * include/ext/extptr_allocator.h (_ExtPtr_allocator::operator==)
7291         (_ExtPtr_allocator::operator!=): Add missing const qualifiers.
7292         * include/ext/pointer.h (readable_traits<_Pointer_adapter<S>>): Add
7293         partial specialization to disambiguate the two constrained
7294         specializations.
7295
7296         * include/experimental/type_traits (experimental::is_pod_v): Disable
7297         -Wdeprecated-declarations warnings around reference to std::is_pod.
7298         * include/std/type_traits (is_pod_v): Likewise.
7299         * testsuite/18_support/max_align_t/requirements/2.cc: Also check
7300         is_standard_layout and is_trivial. Do not check is_pod for C++20.
7301         * testsuite/20_util/is_pod/requirements/explicit_instantiation.cc:
7302         Add -Wno-deprecated for C++20.
7303         * testsuite/20_util/is_pod/requirements/typedefs.cc: Likewise.
7304         * testsuite/20_util/is_pod/value.cc: Likewise.
7305         * testsuite/experimental/type_traits/value.cc: Likewise.
7306
7307 2020-01-09  JeanHeyd "ThePhD" Meneide  <phdofthehouse@gmail.com>
7308
7309         * include/bits/c++config (_GLIBCXX20_DEPRECATED): Add new macro.
7310         * include/std/type_traits (is_pod, is_pod_v): Deprecate for C++20.
7311         * testuite/20_util/is_pod/deprecated-2a.cc: New test.
7312
7313 2020-01-09  Jonathan Wakely  <jwakely@redhat.com>
7314
7315         PR libstdc++/93205
7316         * include/bits/random.h (operator>>): Check stream operation succeeds.
7317         * include/bits/random.tcc (operator<<): Remove redundant __ostream_type
7318         typedefs.
7319         (operator>>): Remove redundant __istream_type typedefs. Check stream
7320         operations succeed.
7321         (__extract_params): New function to fill a vector from a stream.
7322         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error line.
7323
7324         PR libstdc++/93208
7325         * config/abi/pre/gnu.ver: Add new exports.
7326         * include/std/memory_resource (memory_resource::~memory_resource()):
7327         Do not define inline.
7328         (monotonic_buffer_resource::~monotonic_buffer_resource()): Likewise.
7329         * src/c++17/memory_resource.cc (memory_resource::~memory_resource()):
7330         Define.
7331         (monotonic_buffer_resource::~monotonic_buffer_resource()): Define.
7332         * testsuite/20_util/monotonic_buffer_resource/93208.cc: New test.
7333
7334 2020-01-09  François Dumont  <fdumont@gcc.gnu.org>
7335
7336         PR libstdc++/92124
7337         * include/bits/hashtable.h (_Hashtable<>::__alloc_node_gen_t): New
7338         template alias.
7339         (_Hashtable<>::__fwd_value_for): New.
7340         (_Hashtable<>::_M_assign_elements<>): Remove _NodeGenerator template
7341         parameter.
7342         (_Hashtable<>::_M_assign<>): Add _Ht template parameter.
7343         (_Hashtable<>::operator=(const _Hashtable<>&)): Adapt.
7344         (_Hashtable<>::_M_move_assign): Adapt. Replace std::move_if_noexcept
7345         with std::move.
7346         (_Hashtable<>::_Hashtable(const _Hashtable&)): Adapt.
7347         (_Hashtable<>::_Hashtable(const _Hashtable&, const allocator_type&)):
7348         Adapt.
7349         (_Hashtable<>::_Hashtable(_Hashtable&&, const allocator_type&)):
7350         Adapt.
7351         * testsuite/23_containers/unordered_set/92124.cc: New.
7352
7353 2020-01-08  Jonathan Wakely  <jwakely@redhat.com>
7354
7355         PR libstdc++/93201
7356         * src/c++17/fs_ops.cc (do_remove_all): New function implementing more
7357         detailed error reporting for remove_all. Check result of recursive
7358         call before incrementing iterator.
7359         (remove_all(const path&), remove_all(const path&, error_code&)): Use
7360         do_remove_all.
7361         * src/filesystem/ops.cc (remove_all(const path&, error_code&)): Check
7362         result of recursive call before incrementing iterator.
7363         * testsuite/27_io/filesystem/operations/remove_all.cc: Check errors
7364         are reported correctly.
7365         * testsuite/experimental/filesystem/operations/remove_all.cc: Likewise.
7366
7367 2020-01-07  Thomas Rodgers  <trodgers@redhat.com>
7368
7369         * include/std/condition_variable
7370         (condition_variable_any::wait_on): Rename to match current draft
7371         standard.
7372         (condition_variable_any::wait_on_until): Likewise.
7373         (condition_variable_any::wait_on_for): Likewise.
7374         * testsuite/30_threads/condition_variable_any/stop_token/wait_on.cc:
7375         Adjust tests to account for renamed methods.
7376
7377 2020-01-07  François Dumont  <fdumont@gcc.gnu.org>
7378
7379         PR libstdc++/92124
7380         * include/bits/stl_tree.h
7381         (_Rb_tree<>::_M_move_assign(_Rb_tree&, false_type)): Replace
7382         std::move_if_noexcept by std::move.
7383         * testsuite/23_containers/map/92124.cc: New.
7384         * testsuite/23_containers/set/92124.cc: New.
7385
7386 2020-01-06  Jonathan Wakely  <jwakely@redhat.com>
7387
7388         * include/std/stop_token (stop_token): Remove operator!= (LWG 3254).
7389         (stop_source): Likewise (LWG 3362).
7390         * testsuite/30_threads/stop_token/stop_source.cc: Test equality
7391         comparisons.
7392
7393         * include/bits/stl_algobase.h (__is_byte_iter, __min_cmp)
7394         (lexicographical_compare_three_way): Do not depend on
7395         __cpp_lib_concepts.
7396         * include/std/version (__cpp_lib_three_way_comparison): Only define
7397         when __cpp_lib_concepts is defined.
7398         * libsupc++/compare (__cpp_lib_three_way_comparison): Likewise.
7399
7400 2020-01-03  Jonathan Wakely  <jwakely@redhat.com>
7401
7402         * include/bits/stl_algobase.h (lexicographical_compare_three_way):
7403         Only define four-argument overload when __cpp_lib_concepts is defined.
7404
7405 2020-01-01  John David Anglin  <danglin@gcc.gnu.org>
7406
7407         * config/abi/post/hppa-linux-gnu/baseline_symbols.txt: Update.
7408
7409 2020-01-01  Jakub Jelinek  <jakub@redhat.com>
7410
7411         Update copyright years.
7412 \f
7413 Copyright (C) 2020 Free Software Foundation, Inc.
7414
7415 Copying and distribution of this file, with or without modification,
7416 are permitted in any medium without royalty provided the copyright
7417 notice and this notice are preserved.