libstdc++-v3/ChangeLog

   1 2020-11-11  Jonathan Yong  <10walls@gmail.com>
   2
   3         * acinclude.m4 (GLIBCXX_CHECK_LINKER_FEATURES): Exclude
   4         cygwin and mingw from relro linker test.
   5         * configure: Regenerate.
   6
   7 2020-11-11  Paul Scharnofske  <asynts@gmail.com>
   8
   9         * include/std/thread (jthread::operator=(jthread&&)): Transfer
  10         any existing state to a temporary that will request a stop and
  11         then join.
  12         * testsuite/30_threads/jthread/jthread.cc: Test move assignment.
  13
  14 2020-11-11  Jonathan Wakely  <jwakely@redhat.com>
  15
  16         * include/std/stop_token (_Stop_state_t::_M_requester): Define
  17         new struct with members to store and check the thread ID.
  18         (_Stop_state_t::_M_request_stop()): Use _M_requester._M_set().
  19         (_Stop_state_t::_M_remove_callback(_Stop_cb*)): Use
  20         _M_requester._M_is_current_thread().
  21
  22 2020-11-11  Jonathan Wakely  <jwakely@redhat.com>
  23
  24         * include/std/ostream (__syncbuf_base): New class template.
  25         (emit_on_flush, noemit_on_flush, flush_emit): New manipulators.
  26         * include/std/syncstream (basic_syncbuf): Derive from
  27         __syncbuf_base instead of basic_streambuf.
  28         (basic_syncbuf::operator=): Remove self-assignment check.
  29         (basic_syncbuf::swap): Remove self-swap check.
  30         (basic_syncbuf::emit): Do not skip pubsync() call if sequence
  31         is empty.
  32         (basic_syncbuf::sync): Remove no-op pubsync on stringbuf.
  33         (basic_syncbuf::overflow): Define override.
  34         * testsuite/27_io/basic_syncstream/basic_ops/1.cc: Test
  35         basic_osyncstream::put(char_type).
  36         * testsuite/27_io/basic_ostream/emit/1.cc: New test.
  37
  38 2020-11-10  Jonathan Wakely  <jwakely@redhat.com>
  39
  40         * config/locale/generic/c_locale.cc (__set_C_locale()): New function
  41         to set the "C" locale and return the name of the previous locale.
  42         (__convert_to_v<float>, __convert_to_v<double>)
  43         (__convert_to_v<long double>): Use __set_C_locale and set failbit on
  44         error.
  45
  46 2020-11-10  Jonathan Wakely  <jwakely@redhat.com>
  47
  48         * include/std/sstream (basic_stringbug, basic_istringstream)
  49         (basic_ostringstream, basic_stringstream): Reorder C++20
  50         constructors to be declared next to other constructors.
  51
  52 2020-11-10  Jonathan Wakely  <jwakely@redhat.com>
  53
  54         * config/abi/pre/gnu.ver (GLIBCXX_3.4.21): Tighten patterns.
  55         (GLIBCXX_3.4.29): Export new symbols.
  56         * include/bits/alloc_traits.h (__allocator_like): New concept.
  57         * include/std/sstream (basic_stringbuf::swap): Add exception
  58         specification.
  59         (basic_stringbuf::str() const): Add ref-qualifier. Use new
  60         _M_high_mark function.
  61         (basic_stringbuf::str(const SAlloc&) const): Define new function.
  62         (basic_stringbuf::str() &&): Likewise.
  63         (basic_stringbuf::str(const basic_string<C,T,SAlloc>&)):
  64         Likewise.
  65         (basic_stringbuf::str(basic_string<C,T,Alloc>&&)): Likewise.
  66         (basic_stringbuf::view() const): Use _M_high_mark.
  67         (basic_istringstream::str, basic_ostringstream::str)
  68         (basic_stringstream::str): Define new overloads.
  69         * src/c++20/sstream-inst.cc (basic_stringbuf::str)
  70         (basic_istringstream::str, basic_ostringstream::str)
  71         (basic_stringstream::str): Explicit instantiation definitions
  72         for new overloads.
  73         * testsuite/27_io/basic_istringstream/view/char/1.cc: Add more
  74         checks.
  75         * testsuite/27_io/basic_istringstream/view/wchar_t/1.cc:
  76         Likewise.
  77         * testsuite/27_io/basic_ostringstream/view/char/1.cc:
  78         Likewise.
  79         * testsuite/27_io/basic_ostringstream/view/wchar_t/1.cc:
  80         Likewise.
  81         * testsuite/27_io/basic_stringstream/view/char/1.cc:
  82         Likewise.
  83         * testsuite/27_io/basic_stringstream/view/wchar_t/1.cc:
  84         Likewise.
  85         * testsuite/27_io/basic_istringstream/str/char/2.cc: New test.
  86         * testsuite/27_io/basic_istringstream/str/wchar_t/2.cc: New test.
  87         * testsuite/27_io/basic_ostringstream/str/char/3.cc: New test.
  88         * testsuite/27_io/basic_ostringstream/str/wchar_t/3.cc: New test.
  89         * testsuite/27_io/basic_stringbuf/str/char/4.cc: New test.
  90         * testsuite/27_io/basic_stringbuf/str/wchar_t/4.cc: New test.
  91         * testsuite/27_io/basic_stringstream/str/char/5.cc: New test.
  92         * testsuite/27_io/basic_stringstream/str/wchar_t/5.cc.cc: New test.
  93
  94 2020-11-10  Jonathan Wakely  <jwakely@redhat.com>
  95
  96         PR libstdc++/97415
  97         * include/std/sstream (basic_stringbuf::_M_update_egptr)
  98         (basic_stringbuf::__xfer_bufptrs::__xfer_bufptrs): Check for
  99         null before comparing pointers.
 100
 101 2020-11-09  François Dumont  <fdumont@gcc.gnu.org>
 102
 103         * include/debug/array: Remove.
 104         * include/Makefile.am: Remove <debug/array>.
 105         * include/Makefile.in: Regenerate.
 106         * include/experimental/functional: Adapt.
 107         * include/std/array: Move to _GLIBCXX_INLINE_VERSION namespace.
 108         * include/std/functional: Adapt.
 109         * include/std/span: Adapt.
 110         * testsuite/23_containers/array/debug/back1_neg.cc:
 111         Remove dg-require-debug-mode. Add -D_GLIBCXX_ASSERTIONS option.
 112         * testsuite/23_containers/array/debug/back2_neg.cc: Likewise.
 113         * testsuite/23_containers/array/debug/front1_neg.cc: Likewise.
 114         * testsuite/23_containers/array/debug/front2_neg.cc: Likewise.
 115         * testsuite/23_containers/array/debug/square_brackets_operator1_neg.cc:
 116         Likewise.
 117         * testsuite/23_containers/array/debug/square_brackets_operator2_neg.cc:
 118         Likewise.
 119         * testsuite/23_containers/array/element_access/60497.cc
 120         * testsuite/23_containers/array/tuple_interface/get_debug_neg.cc:
 121         Remove.
 122         * testsuite/23_containers/array/tuple_interface/get_neg.cc
 123         * testsuite/23_containers/array/tuple_interface/tuple_element_debug_neg.cc
 124         * testsuite/23_containers/array/tuple_interface/tuple_element_neg.cc
 125
 126 2020-11-09  François Dumont  <fdumont@gcc.gnu.org>
 127
 128         * include/debug/assertions.h (__glibcxx_requires_non_empty_range):
 129         Remove __builtin_expect.
 130         (__glibcxx_requires_subscript): Likewise.
 131         (__glibcxx_requires_nonempty): Likewise.
 132         * include/debug/formatter.h (__check_singular): Add C++11 constexpr
 133         qualification.
 134         * include/debug/helper_functions.h (__check_singular): Likewise. Skip
 135         check if constant evaluated.
 136         (__valid_range): Do not skip check if constant evaluated.
 137         * include/debug/macros.h (_GLIBCXX_DEBUG_VERIFY_COND_AT): Add
 138         __builtin_expect.
 139         (_GLIBCXX_DEBUG_VERIFY_AT_F): Use __glibcxx_assert_1.
 140         * testsuite/21_strings/basic_string_view/element_access/char/back_constexpr_neg.cc:
 141         New test.
 142         * testsuite/21_strings/basic_string_view/element_access/char/constexpr.cc: New test.
 143         * testsuite/21_strings/basic_string_view/element_access/char/constexpr_neg.cc: New test.
 144         * testsuite/21_strings/basic_string_view/element_access/char/front_back_constexpr.cc:
 145         New test.
 146         * testsuite/21_strings/basic_string_view/element_access/char/front_constexpr_neg.cc:
 147         New test.
 148         * testsuite/21_strings/basic_string_view/element_access/wchar_t/back_constexpr_neg.cc:
 149         New test.
 150         * testsuite/21_strings/basic_string_view/element_access/wchar_t/constexpr.cc: New test.
 151         * testsuite/21_strings/basic_string_view/element_access/wchar_t/constexpr_neg.cc: New test.
 152         * testsuite/21_strings/basic_string_view/element_access/wchar_t/front_constexpr_neg.cc:
 153         New test.
 154         * testsuite/25_algorithms/lower_bound/debug/constexpr_partitioned_neg.cc: New test.
 155         * testsuite/25_algorithms/lower_bound/debug/constexpr_partitioned_pred_neg.cc: New test.
 156         * testsuite/25_algorithms/lower_bound/debug/constexpr_valid_range_neg.cc: New test.
 157         * testsuite/25_algorithms/lower_bound/debug/partitioned_neg.cc: New test.
 158         * testsuite/25_algorithms/lower_bound/debug/partitioned_pred_neg.cc: New test.
 159         * testsuite/25_algorithms/upper_bound/debug/constexpr_partitioned_neg.cc: New test.
 160         * testsuite/25_algorithms/upper_bound/debug/constexpr_partitioned_pred_neg.cc: New test.
 161         * testsuite/25_algorithms/upper_bound/debug/constexpr_valid_range_neg.cc: New test.
 162         * testsuite/25_algorithms/upper_bound/debug/partitioned_neg.cc: New test.
 163         * testsuite/25_algorithms/upper_bound/debug/partitioned_pred_neg.cc: New test.
 164
 165 2020-11-09  Jonathan Wakely  <jwakely@redhat.com>
 166
 167         * include/bits/uniform_int_dist.h (__detail::_Power_of_2):
 168         Document that true result for zero is intentional.
 169
 170 2020-11-09  Jonathan Wakely  <jwakely@redhat.com>
 171
 172         * include/std/bit (__popcount): Remove redundant check for zero.
 173
 174 2020-11-09  Jonathan Wakely  <jwakely@redhat.com>
 175
 176         PR libstdc++/97729
 177         * libsupc++/exception_ptr.h (exception_ptr::exception_ptr())
 178         (exception_ptr::exception_ptr(const exception_ptr&))
 179         (exception_ptr::~exception_ptr()): Remove 'always_inline'
 180         attributes. Use 'inline' unconditionally.
 181
 182 2020-11-09  Jonathan Wakely  <jwakely@redhat.com>
 183
 184         PR libstdc++/97758
 185         * include/bits/std_function.h [!__cpp_rtti]: Include <typeinfo>.
 186
 187 2020-11-07  Liu Hao  <lh_mouse@126.com>
 188
 189         * libsupc++/cxxabi.h: (__cxa_atexit): mark with _GLIBCXX_CDTOR_CALLABI
 190         (__cxa_thread_atexit): ditto
 191         * libsupc++/atexit_thread.cc: (__cxa_atexit): mark with
 192         _GLIBCXX_CDTOR_CALLABI
 193         (__cxa_thread_atexit): ditto
 194         (elt): ditto
 195
 196 2020-11-06  Jonathan Wakely  <jwakely@redhat.com>
 197
 198         * config/abi/pre/gnu.ver (GLIBCXX_3.4.21): Tighten up patterns
 199         for basic_stringbuf that refer to __xfer_bufptrs.
 200
 201 2020-11-05  Marek Polacek  <polacek@redhat.com>
 202
 203         PR c++/25814
 204         * testsuite/20_util/reference_wrapper/lwg2993.cc: Add a dg-warning.
 205         * testsuite/25_algorithms/generate_n/87982_neg.cc: Likewise.
 206
 207 2020-11-05  Jonathan Wakely  <jwakely@redhat.com>
 208
 209         PR libstdc++/96269
 210         * include/std/optional (operator==, operator!=, operator<)
 211         (operator>, operator<=, operator>=): Fix types used in
 212         SFINAE constraints.
 213         * testsuite/20_util/optional/relops/96269.cc: New test.
 214
 215 2020-11-05  Jonathan Wakely  <jwakely@redhat.com>
 216
 217         PR libstdc++/97731
 218         * src/filesystem/dir.cc (recursive_directory_iterator): Call the
 219         right overload of _Dir::advance.
 220         * testsuite/experimental/filesystem/iterators/97731.cc: New test.
 221
 222 2020-11-05  Jonathan Wakely  <jwakely@redhat.com>
 223
 224         PR libstdc++/97729
 225         * include/std/future (__basic_future::_M_get_result): Use
 226         nullptr for null pointer constant.
 227         * libsupc++/eh_ptr.cc (operator==, operator!=): Remove
 228         definitions.
 229         * libsupc++/exception_ptr.h (_GLIBCXX_EH_PTR_USED): Define
 230         macro to conditionally add __attribute__((__used__)).
 231         (operator==, operator!=, exception_ptr::exception_ptr())
 232         (exception_ptr::exception_ptr(const exception_ptr&))
 233         (exception_ptr::~exception_ptr())
 234         (exception_ptr::operator=(const exception_ptr&))
 235         (exception_ptr::swap(exception_ptr&)): Always define as
 236         inline. Add macro to be conditionally "used".
 237
 238 2020-11-05  Jonathan Wakely  <jwakely@redhat.com>
 239
 240         PR libstdc++/97729
 241         * config/abi/pre/gnu.ver (GLIBCXX_3.4.29): Add exports.
 242         * src/c++20/sstream-inst.cc (basic_stringbuf): Instantiate
 243         private constructor taking __xfer_bufptrs.
 244
 245 2020-11-05  Jonathan Wakely  <jwakely@redhat.com>
 246
 247         * include/std/sstream (basic_stringbuf(const allocator_type&):
 248         Add explicit.
 249         (basic_stringbuf(const basic_string<C,T,SA>&, openmode, const A&)):
 250         Call _M_stringbuf_init. Construct _M_string from pointer and length
 251         to avoid constraint checks for string view.
 252         (basic_stringbuf::view()): Make __sv_type alias local to the
 253         function.
 254         (basic_istringstream(const basic_string<C,T,SA>&, openmode, const A&)):
 255         Pass string to _M_streambuf instead of constructing a temporary
 256         with the wrong allocator.
 257         (basic_ostringstream(const basic_string<C,T,SA>&, openmode, const A&)):
 258         Likewise.
 259         (basic_stringstream(const basic_string<C,T,SA>&, openmode, const A&)):
 260         Likewise.
 261         * src/c++20/sstream-inst.cc: Use string_view and wstring_view
 262         typedefs in explicit instantiations.
 263         * testsuite/27_io/basic_istringstream/cons/char/1.cc: Add more
 264         tests for constructors.
 265         * testsuite/27_io/basic_ostringstream/cons/char/1.cc: Likewise.
 266         * testsuite/27_io/basic_stringbuf/cons/char/1.cc: Likewise.
 267         * testsuite/27_io/basic_stringbuf/cons/char/2.cc: Likewise.
 268         * testsuite/27_io/basic_stringbuf/cons/wchar_t/1.cc: Likewise.
 269         * testsuite/27_io/basic_stringbuf/cons/wchar_t/2.cc: Likewise.
 270         * testsuite/27_io/basic_stringstream/cons/char/1.cc: Likewise.
 271
 272 2020-11-05  Jonathan Wakely  <jwakely@redhat.com>
 273
 274         * include/std/sstream: Adjust whitespace.
 275
 276 2020-11-04  Jonathan Wakely  <jwakely@redhat.com>
 277
 278         PR libstdc++/97719
 279         * include/std/sstream (basic_stringstream(string_type&&, openmode)):
 280         Fix default argument.
 281         * testsuite/27_io/basic_stringstream/cons/char/97719.cc: New test.
 282
 283 2020-11-04  Jonathan Wakely  <jwakely@redhat.com>
 284
 285         * testsuite/18_support/96817.cc: Fail fast if the library is
 286         configured to not use futexes.
 287
 288 2020-11-04  Jonathan Wakely  <jwakely@redhat.com>
 289
 290         PR libstdc++/94971
 291         * include/bits/stl_algo.h (search(FIter, FIter, const Searcher):
 292         Adjust #if condition.
 293         * include/parallel/algo.h (search(FIter, FIter, const Searcher&):
 294         Define new overload for C++17.
 295
 296 2020-11-04  Jonathan Wakely  <jwakely@redhat.com>
 297
 298         PR libstdc++/92285
 299         * doc/xml/manual/evolution.xml: Document change to base class.
 300         * doc/html/manual/api.html: Regenerate.
 301
 302 2020-11-04  Jonathan Wakely  <jwakely@redhat.com>
 303
 304         * include/bits/uniform_int_dist.h (uniform_int_distribution::_S_nd):
 305         Use qualified-id to refer to static member functions.
 306
 307 2020-11-03  Jonathan Wakely  <jwakely@redhat.com>
 308
 309         * include/std/syncstream: Include <bits/std_mutex.h>
 310         unconditionally.
 311
 312 2020-11-03  François Dumont  <fdumont@gcc.gnu.org>
 313
 314         * config/abi/pre/gnu-versioned-namespace.ver:
 315         Add __istream_extract and _Safe_local_iterator_base::_M_attach_single
 316         symbols.
 317
 318 2020-11-03  Jonathan Wakely  <jwakely@redhat.com>
 319
 320         * src/c++11/mutex.cc [_GLIBCXX_HAVE_TLS] (__once_proxy): Define
 321         separately for TLS targets.
 322         [!_GLIBCXX_HAVE_TLS] (__get_once_functor_lock_ptr): Replace with ...
 323         (set_lock_ptr): ... this. Set new value and return previous
 324         value.
 325         [!_GLIBCXX_HAVE_TLS] (__set_once_functor_lock_ptr): Adjust to
 326         use set_lock_ptr.
 327         [!_GLIBCXX_HAVE_TLS] (__once_proxy): Likewise.
 328
 329 2020-11-03  Jonathan Wakely  <jwakely@redhat.com>
 330
 331         PR libstdc++/55394
 332         PR libstdc++/66146
 333         PR libstdc++/84323
 334         * config/abi/pre/gnu.ver (GLIBCXX_3.4.29): Add new symbols.
 335         * include/std/mutex [!_GLIBCXX_HAS_GTHREADS] (once_flag): Define
 336         even when gthreads is not supported.
 337         (once_flag::_M_once) [_GLIBCXX_HAVE_LINUX_FUTEX]: Change type
 338         from __gthread_once_t to int.
 339         (once_flag::_M_passive(), once_flag::_M_activate())
 340         (once_flag::_M_finish(bool), once_flag::_Active_execution):
 341         Define new members for futex and non-threaded implementation.
 342         [_GLIBCXX_HAS_GTHREADS] (once_flag::_Prepare_execution): New
 343         RAII helper type.
 344         (call_once): Use new members of once_flag.
 345         * src/c++11/mutex.cc (std::once_flag::_M_activate): Define.
 346         (std::once_flag::_M_finish): Define.
 347         * testsuite/30_threads/call_once/39909.cc: Do not require
 348         gthreads.
 349         * testsuite/30_threads/call_once/49668.cc: Likewise.
 350         * testsuite/30_threads/call_once/60497.cc: Likewise.
 351         * testsuite/30_threads/call_once/call_once1.cc: Likewise.
 352         * testsuite/30_threads/call_once/dr2442.cc: Likewise.
 353         * testsuite/30_threads/call_once/once_flag.cc: Add test for
 354         constexpr constructor.
 355         * testsuite/30_threads/call_once/66146.cc: New test.
 356         * testsuite/30_threads/call_once/constexpr.cc: Removed.
 357         * testsuite/30_threads/once_flag/cons/constexpr.cc: Removed.
 358
 359 2020-11-03  Jonathan Yong  <10walls@gmail.com>
 360
 361         * src/Makefile.am (libstdc___la_LINK): Add lt_host_flags.
 362         * src/Makefile.in: Regenerate.
 363
 364 2020-11-02  Thomas Rodgers  <trodgers@redhat.com>
 365
 366         * doc/doxygen/user.cfg.in (INPUT): Add new header.
 367         * include/Makefile.am (std_headers): Add new header.
 368         * include/Makefile.in: Regenerate.
 369         * include/precompiled/stdc++.h: Include new header.
 370         * include/std/syncstream: New header.
 371         * include/std/version: Add __cpp_lib_syncbuf.
 372         * testsuite/27_io/basic_syncbuf/1.cc: New test.
 373         * testsuite/27_io/basic_syncbuf/2.cc: Likewise.
 374         * testsuite/27_io/basic_syncbuf/basic_ops/1.cc:
 375         Likewise.
 376         * testsuite/27_io/basic_syncbuf/requirements/types.cc:
 377         Likewise.
 378         * testsuite/27_io/basic_syncbuf/sync_ops/1.cc:
 379         Likewise.
 380         * testsuite/27_io/basic_syncstream/1.cc: Likewise.
 381         * testsuite/27_io/basic_syncstream/2.cc: Likewise.
 382         * testsuite/27_io/basic_syncstream/basic_ops/1.cc:
 383         Likewise.
 384         * testsuite/27_io/basic_syncstream/requirements/types.cc:
 385         Likewise.
 386
 387 2020-11-01  Jonathan Wakely  <jwakely@redhat.com>
 388
 389         * include/std/type_traits (is_integral<wchar_t>)
 390         (make_unsigned<wchar_t>, make_signed<wchar_t>): Define based
 391         on #ifdef __WCHAR_TYPE__ instead of _GLIBCXX_USE_WCHAR_T.
 392         * include/bits/cpp_type_traits.h (__is_integer<wchar_t>)
 393         (__is_char<wchar_t>): Likewise.
 394
 395 2020-10-31  François Dumont  <fdumont@gcc.gnu.org>
 396
 397         * src/c++17/floating_from_chars.cc (_GLIBCXX_USE_CX11_ABI): Add define.
 398         (buffering_string): New.
 399         [!_GLIBCXX_USE_CXX11_ABI](reserve_string): New.
 400         (from_chars): Adapt.
 401         * src/c++20/sstream-inst.cc: Limit instantiations to
 402         _GLIBCXX_USE_CXX11_ABI.
 403
 404 2020-10-31  Jonathan Wakely  <jwakely@redhat.com>
 405
 406         * include/bits/random.h (independent_bit_engine): Fix typo
 407         in comment.
 408         (shuffle_order_engine): Fix incorrect description in comment.
 409         * include/bits/random.tcc (__representable_as_double
 410         (__p1_representable_as_double): New helper functions.
 411         (shuffle_order_engine::operator()): Use double for calculation
 412         if (max() - min() + 1) is representable as double.
 413         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error
 414         line number.
 415
 416 2020-10-31  Jonathan Wakely  <jwakely@redhat.com>
 417
 418         PR libstdc++/96958
 419         * include/bits/hashtable_policy.h (_Prime_rehash_policy)
 420         (_Power2_rehash_policy): Use ceil and floor instead of ceill and
 421         floorl.
 422         * src/c++11/hashtable_c++0x.cc (_Prime_rehash_policy): Likewise.
 423         Use double instead of long double.
 424
 425 2020-10-31  Patrick Palka  <ppalka@redhat.com>
 426
 427         PR libstdc++/97600
 428         * include/std/ranges (basic_istream_view::begin): Initialize
 429         _Iterator from 'this' instead of '*this'.
 430         (basic_istream_view::_Iterator::_Iterator): Adjust constructor
 431         accordingly.
 432         (filter_view::_Iterator::_Iterator): Take a filter_view*
 433         argument instead of a filter_view& argument.
 434         (filter_view::_Sentinel::_Sentinel): Likewise.
 435         (filter_view::begin): Initialize _Iterator from 'this' instead
 436         of '*this'.
 437         (filter_view::end): Likewise.
 438         (transform_view::_Iterator::_Iterator): Take a _Parent* instead
 439         of a _Parent&.
 440         (filter_view::_Iterator::operator+): Adjust accordingly.
 441         (filter_view::_Iterator::operator-): Likewise.
 442         (filter_view::begin): Initialize _Iterator from 'this' instead
 443         of '*this'.
 444         (filter_view::end): Likewise.
 445         (join_view::_Iterator): Take a _Parent* instead of a _Parent&.
 446         (join_view::_Sentinel): Likewise.
 447         (join_view::begin): Initialize _Iterator from 'this' instead of
 448         '*this'.
 449         (join_view::end): Initialize _Sentinel from 'this' instead of
 450         '*this'.
 451         (split_view::_OuterIter): Take a _Parent& instead of a _Parent*.
 452         (split_view::begin): Initialize _OuterIter from 'this' instead
 453         of '*this'.
 454         (split_view::end): Likewise.
 455         * testsuite/std/ranges/97600.cc: New test.
 456
 457 2020-10-30  Jonathan Wakely  <jwakely@redhat.com>
 458
 459         * include/std/ranges (enable_borrowed_view<take_view<T>>)
 460         (enable_borrowed_view<drop_view<T>>)
 461         (enable_borrowed_view<drop_while_view<T>>)
 462         (enable_borrowed_view<reverse_view<T>>)
 463         (enable_borrowed_view<common_view<T>>)
 464         (enable_borrowed_view<elements_view<T>>): Add partial
 465         specializations as per P2017R1.
 466         * testsuite/std/ranges/adaptors/conditionally_borrowed.cc:
 467         New test.
 468
 469 2020-10-30  Jonathan Wakely  <jwakely@redhat.com>
 470
 471         PR libstdc++/96958
 472         * include/bits/hashtable_policy.h (_Prime_rehash_policy)
 473         (_Power2_rehash_policy): Use double instead of long double.
 474
 475 2020-10-30  Jonathan Wakely  <jwakely@redhat.com>
 476
 477         * testsuite/23_containers/vector/bool/modifiers/insert/31370.cc:
 478         Avoid -Wcatch-value warnings.
 479
 480 2020-10-30  Patrick Palka  <ppalka@redhat.com>
 481
 482         * include/std/ranges (__detail::__box): For the partial
 483         specialization used by types that are already semiregular,
 484         make the default constructor value-initialize the underlying
 485         object instead of default-initializing it.  Make its in place
 486         constructor explicit.
 487         * testsuite/std/ranges/adaptors/detail/semiregular_box.cc:
 488         Augment test.
 489
 490 2020-10-30  David Edelsohn  <dje.gcc@gmail.com>
 491
 492         * testsuite/20_util/unique_ptr/creation/for_overwrite.cc: XFAIL on AIX.
 493
 494 2020-10-29  Jonathan Wakely  <jwakely@redhat.com>
 495
 496         * config/abi/pre/gnu.ver (GLIBCXX_3.4.21): Tighten patterns
 497         for old <sstream> symbols some more.
 498
 499 2020-10-29  Jonathan Wakely  <jwakely@redhat.com>
 500
 501         * include/bits/ranges_util.h (subrange::subrange(R&&)): Use
 502         direct-initialization instead of list-initialization, so a
 503         potential narrowing conversion from ranges::size(r) to the
 504         stored size isn't ill-formed.
 505
 506 2020-10-29  Jonathan Wakely  <jwakely@redhat.com>
 507
 508         * include/bits/parse_numbers.h (_Select_int_base): Avoid
 509         narrowing conversion in constant expression.
 510         * include/experimental/buffer (buffer_copy): Avoid narrowing
 511         conversion.
 512         * include/experimental/internet (hash<>::operator()): Do not
 513         use deprecated 'argument_type' member.
 514         * include/std/variant (variant::emplace): Use cast instead
 515         of implicit conversion from size_t to narrower unsigned type.
 516
 517 2020-10-29  Jonathan Wakely  <jwakely@redhat.com>
 518
 519         * include/tr1/shared_ptr.h (__shared_count, __shared_ptr)
 520         (shared_ptr): Add diagnostic pragmas around uses of auto_ptr.
 521         * testsuite/tr1/2_general_utilities/shared_ptr/cons/43820_neg.cc:
 522         Adust dg-error line numbers.
 523
 524 2020-10-29  Jonathan Wakely  <jwakely@redhat.com>
 525
 526         * testsuite/18_support/96817.cc: Avoid -Wunused warnings.
 527         * testsuite/20_util/any/assign/2.cc: Likewise.
 528         * testsuite/20_util/any/cons/2.cc: Likewise.
 529         * testsuite/20_util/align/1.cc: Avoid -Wsign-compare warning.
 530         * testsuite/20_util/function/65760.cc: Avoid -Wunused warning.
 531         * testsuite/20_util/function/1.cc: Avoid -Wcatch-value warning.
 532         * testsuite/20_util/function/cons/move_target.cc: Avoid -Wunused
 533         warning.
 534         * testsuite/20_util/headers/memory/synopsis.cc: Add exception
 535         specification.
 536         * testsuite/20_util/monotonic_buffer_resource/allocate.cc: Avoid
 537         -Wsign-compare warning.
 538         * testsuite/20_util/tuple/cons/deduction.cc: Avoid -Wunused
 539         warning.
 540         * testsuite/20_util/specialized_algorithms/uninitialized_copy/808590-cxx11.cc:
 541         Avoid -Wdeprecated-copy warning.
 542         * testsuite/21_strings/basic_string/56166.cc: Avoid
 543         -Wcatch-value warning.
 544         * testsuite/21_strings/basic_string/numeric_conversions/char/stod.cc:
 545         Avoid -Wcatch-value warnings.
 546         * testsuite/21_strings/basic_string/numeric_conversions/char/stof.cc:
 547         Likewise.
 548         * testsuite/21_strings/basic_string/numeric_conversions/char/stoi.cc:
 549         Likewise.
 550         * testsuite/21_strings/basic_string/numeric_conversions/char/stol.cc:
 551         Likewise.
 552         * testsuite/21_strings/basic_string/numeric_conversions/char/stold.cc:
 553         Likewise.
 554         * testsuite/21_strings/basic_string/numeric_conversions/char/stoll.cc:
 555         Likewise.
 556         * testsuite/21_strings/basic_string/numeric_conversions/char/stoul.cc:
 557         Likewise.
 558         * testsuite/21_strings/basic_string/numeric_conversions/char/stoull.cc:
 559         Likewise.
 560         * testsuite/21_strings/basic_string/numeric_conversions/wchar_t/stod.cc:
 561         Likewise.
 562         * testsuite/21_strings/basic_string/numeric_conversions/wchar_t/stof.cc:
 563         Likewise.
 564         * testsuite/21_strings/basic_string/numeric_conversions/wchar_t/stoi.cc:
 565         Likewise.
 566         * testsuite/21_strings/basic_string/numeric_conversions/wchar_t/stol.cc:
 567         Likewise.
 568         * testsuite/21_strings/basic_string/numeric_conversions/wchar_t/stold.cc:
 569         Likewise.
 570         * testsuite/21_strings/basic_string/numeric_conversions/wchar_t/stoll.cc:
 571         Likewise.
 572         * testsuite/21_strings/basic_string/numeric_conversions/wchar_t/stoul.cc:
 573         Likewise.
 574         * testsuite/21_strings/basic_string/numeric_conversions/wchar_t/stoull.cc:
 575         Likewise.
 576         * testsuite/21_strings/basic_string_view/operations/compare/char/nonnull.cc:
 577         Prune additional diagnostics.
 578         * testsuite/21_strings/basic_string_view/operations/find/char/nonnull.cc:
 579         Likewise.
 580         * testsuite/21_strings/basic_string_view/operations/rfind/char/nonnull.cc:
 581         Likewise.
 582         * testsuite/21_strings/headers/string/synopsis.cc: Add exception
 583         specifications.
 584         * testsuite/22_locale/locale/cons/12352.cc: Define sized
 585         delete operators to avoid warnings.
 586         * testsuite/23_containers/deque/modifiers/swap/1.cc: Add
 587         exception specification.
 588         * testsuite/23_containers/forward_list/cons/11.cc: Avoid
 589         -Wdeprecated-copy warning.
 590         * testsuite/23_containers/headers/bitset/synopsis.cc: Add
 591         exception specification.
 592         * testsuite/23_containers/headers/deque/synopsis.cc: Likewise.
 593         * testsuite/23_containers/headers/forward_list/synopsis.cc:
 594         Likewise.
 595         * testsuite/23_containers/headers/list/synopsis.cc: Likewise.
 596         * testsuite/23_containers/headers/map/synopsis.cc: Likewise.
 597         * testsuite/23_containers/headers/queue/synopsis.cc: Likewise.
 598         * testsuite/23_containers/headers/set/synopsis.cc: Likewise.
 599         * testsuite/23_containers/headers/vector/synopsis.cc: Likewise.
 600         * testsuite/23_containers/list/modifiers/swap/1.cc: Likewise.
 601         * testsuite/23_containers/map/modifiers/swap/1.cc: Likewise.
 602         * testsuite/23_containers/multimap/modifiers/swap/1.cc:
 603         Likewise.
 604         * testsuite/23_containers/multiset/modifiers/swap/1.cc:
 605         Likewise.
 606         * testsuite/23_containers/set/modifiers/swap/1.cc: Likewise.
 607         * testsuite/23_containers/unordered_set/56267-2.cc: Avoid
 608         -Wdeprecated-copy warning.
 609         * testsuite/23_containers/vector/bool/23632.cc: Avoid
 610         -Wempty-body warning.
 611         * testsuite/23_containers/vector/modifiers/swap/1.cc: Add
 612         exception specification.
 613         * testsuite/25_algorithms/heap/moveable2.cc: Fix misplaced
 614         parentheses around arguments.
 615         * testsuite/25_algorithms/sample/1.cc: Use return value.
 616         * testsuite/25_algorithms/search/searcher.cc: Avoid -Wunused
 617         warnings.
 618         * testsuite/27_io/basic_ostream/exceptions/char/9561.cc:
 619         Likewise.
 620         * testsuite/27_io/basic_ostream/exceptions/wchar_t/9561.cc:
 621         Likewise.
 622         * testsuite/27_io/filesystem/operations/remove_all.cc: Avoid
 623         -Wsign-compare warning.
 624         * testsuite/experimental/any/assign/2.cc: Avoid -Wunused warnings.
 625         * testsuite/experimental/any/cons/2.cc: Likewise.
 626         * testsuite/experimental/filesystem/operations/remove_all.cc:
 627         Avoid -Wign-compare warning.
 628         * testsuite/experimental/memory/observer_ptr/cons/cons.cc:
 629         Likewise.
 630         * testsuite/experimental/memory_resource/null_memory_resource.cc:
 631         Likewise.
 632         * testsuite/experimental/source_location/1.cc: Avoid -Waddress
 633         warning.
 634         * testsuite/ext/pod_char_traits.cc: Avoid -Wunused warning.
 635         * testsuite/ext/vstring/modifiers/clear/56166.cc: Avoid
 636         -Wcatch-value.
 637         * testsuite/std/concepts/concepts.lang/concept.swappable/swap.cc:
 638         Avoid -Wunused warning.
 639         * testsuite/std/concepts/concepts.lang/concept.swappable/swappable.cc:
 640         Likewise.
 641         * testsuite/tr1/2_general_utilities/shared_ptr/cons/43820_neg.cc:
 642         Prune additional warnings.
 643         * testsuite/tr1/3_function_objects/function/1.cc: Avoid
 644         -Wcatch-value warning.
 645         * testsuite/util/replacement_memory_operators.h: Define sized
 646         delete to avoid warnings.
 647         * testsuite/util/testsuite_api.h (_NonDefaultConstructible): Add
 648         user-declared assignment operator to stop -Wdeprecated-copy
 649         warnings.
 650         * testsuite/util/testsuite_containers.h: Avoid -Wunused warning.
 651         * testsuite/util/testsuite_iterators.h: Avoid -Wsign-compare
 652         warnings.
 653         * testsuite/util/testsuite_new_operators.h: Define sized deleted.
 654
 655 2020-10-29  Jonathan Wakely  <jwakely@redhat.com>
 656
 657         * testsuite/25_algorithms/all_of/constexpr.cc: Check result of
 658         the algorithm.
 659         * testsuite/25_algorithms/any_of/constexpr.cc: Likewise.
 660         * testsuite/25_algorithms/binary_search/constexpr.cc: Likewise.
 661         * testsuite/25_algorithms/copy_backward/constexpr.cc: Likewise.
 662         * testsuite/25_algorithms/count/constexpr.cc: Likewise.
 663         * testsuite/25_algorithms/equal/constexpr.cc: Likewise.
 664         * testsuite/25_algorithms/equal_range/constexpr.cc: Likewise.
 665         * testsuite/25_algorithms/fill/constexpr.cc: Likewise.
 666         * testsuite/25_algorithms/find_end/constexpr.cc: Likewise.
 667         * testsuite/25_algorithms/find_if/constexpr.cc: Likewise.
 668         * testsuite/25_algorithms/is_partitioned/constexpr.cc: Likewise.
 669         * testsuite/25_algorithms/is_permutation/constexpr.cc: Likewise.
 670         * testsuite/25_algorithms/is_sorted_until/constexpr.cc:
 671         Likewise.
 672         * testsuite/25_algorithms/lexicographical_compare/constexpr.cc:
 673         Likewise.
 674         * testsuite/25_algorithms/lower_bound/constexpr.cc: Likewise.
 675         * testsuite/25_algorithms/merge/constexpr.cc: Likewise.
 676         * testsuite/25_algorithms/mismatch/constexpr.cc: Likewise.
 677         * testsuite/25_algorithms/none_of/constexpr.cc: Likewise.
 678         * testsuite/25_algorithms/partition_copy/constexpr.cc: Likewise.
 679         * testsuite/25_algorithms/remove_copy/constexpr.cc: Likewise.
 680         * testsuite/25_algorithms/remove_copy_if/constexpr.cc: Likewise.
 681         * testsuite/25_algorithms/remove_if/constexpr.cc: Likewise.
 682         * testsuite/25_algorithms/replace_if/constexpr.cc: Likewise.
 683         * testsuite/25_algorithms/reverse/constexpr.cc: Likewise.
 684         * testsuite/25_algorithms/reverse_copy/constexpr.cc: Likewise.
 685         * testsuite/25_algorithms/rotate_copy/constexpr.cc: Likewise.
 686         * testsuite/25_algorithms/search/constexpr.cc: Likewise.
 687         * testsuite/25_algorithms/set_difference/constexpr.cc: Likewise.
 688         * testsuite/25_algorithms/set_intersection/constexpr.cc:
 689         Likewise.
 690         * testsuite/25_algorithms/set_symmetric_difference/constexpr.cc:
 691         Likewise.
 692         * testsuite/25_algorithms/set_union/constexpr.cc: Likewise.
 693         * testsuite/25_algorithms/unique_copy/constexpr.cc: Likewise.
 694         * testsuite/25_algorithms/upper_bound/constexpr.cc: Likewise.
 695
 696 2020-10-29  Jonathan Wakely  <jwakely@redhat.com>
 697
 698         * include/bits/uniform_int_dist.h (_Power_of_two): Add
 699         constexpr.
 700         (uniform_int_distribution::_S_nd): Add static_assert to ensure
 701         the wider type is twice as wide as the result type.
 702         (uniform_int_distribution::__generate_impl): Add static_assert
 703         and declare variables as constexpr where appropriate.
 704         (uniform_int_distribution:operator()): Likewise. Only consider
 705         the uniform random bit generator's range of possible results
 706         when deciding whether _S_nd can be used, not the __uctype type.
 707
 708 2020-10-29  Jonathan Wakely  <jwakely@redhat.com>
 709
 710         * include/ext/rope (_Refcount_Base::_M_ref_count): Remove
 711         volatile qualifier.
 712         (_Refcount_Base::_M_decr()): Likewise.
 713
 714 2020-10-29  Jonathan Wakely  <jwakely@redhat.com>
 715
 716         * include/bits/std_function.h (_Function_handler<void, void>):
 717         Define explicit specialization used for invalid target types.
 718         (_Base_manager::_M_manager) [!__cpp_rtti]: Return null.
 719         (function::target_type()): Check for null pointer.
 720         (function::target()): Define unconditionall. Fix bug with
 721         const_cast of function pointer type.
 722         (function::target() const): Define unconditionally, but
 723         only use RTTI if enabled.
 724         * testsuite/20_util/function/target_no_rtti.cc: New test.
 725
 726 2020-10-29  Patrick Palka  <ppalka@redhat.com>
 727
 728         * testsuite/25_algorithms/lexicographical_compare/constrained.cc:
 729         (test03): Fix initializing the vector vy with the array y of size 4.
 730
 731 2020-10-29  Jonathan Wakely  <jwakely@redhat.com>
 732
 733         * include/bits/hashtable_policy.h (_Local_iterator_base): Cast
 734         value to avoid -Wsign-compare warnings.
 735         * include/bits/regex.h (sub_match::_M_str): Avoid narrowing
 736         conversion.
 737         * include/bits/regex_compiler.tcc (_Compiler::_M_quantifier):
 738         Initialize variable to avoid -Wmaybe-uninitialized warning.
 739         * include/bits/shared_ptr_base.h (_Sp_counted_deleter::_Impl):
 740         Reorder mem-initializer-list to avoid -Wreorder warning.
 741         * include/bits/stl_tree.h (_Rb_tree_impl): Explicitly
 742         initialize base class in copy constructor.
 743         * include/debug/safe_iterator.h (_Safe_iterator): Likewise.
 744         * include/ext/debug_allocator.h: Reorder mem-initializer-list
 745         to avoid -Wreorder warning.
 746         * include/ext/throw_allocator.h (throw_allocator_limit)
 747         (throw_allocator_random): Add user-declared assignment operators
 748         to avoid -Wdeprecated-copy warnings.
 749
 750 2020-10-29  Jonathan Wakely  <jwakely@redhat.com>
 751
 752         * include/bits/uniform_int_dist.h (uniform_int_distribution):
 753         Rename _UniformRandomNumberGenerator template parameters to
 754         _UniformRandomBitGenerator, as per P0346R1.
 755
 756 2020-10-29  Jonathan Wakely  <jwakely@redhat.com>
 757
 758         * include/std/sstream (basic_stringbuf(__string_type&&, openmode)):
 759         Call _M_init_syncbuf to set up get/put areas. Also qualify
 760         std::move.
 761
 762 2020-10-28  Jonathan Wakely  <jwakely@redhat.com>
 763
 764         * config/abi/pre/gnu.ver (GLIBCXX_3.4.29): Remove duplicate
 765         patterns.
 766         (CXXABI_1.3.13): Restore missing piece.
 767
 768 2020-10-28  Thomas Rodgers  <trodgers@redhat.com>
 769
 770         * acinclude.m4 (glibcxx_SUBDIRS): Add src/c++20.
 771         * config/abi/pre/gnu.ver (GLIBCXX_3.4.29): New symbols.
 772         * configure: Regenerate.
 773         * include/std/sstream:
 774         (basic_stringbuf::basic_stringbuf(allocator const&)): New constructor.
 775         (basic_stringbuf::basic_stringbuf(openmode, allocator const&)): Likewise.
 776         (basic_stringbuf::basic_stringbuf(basic_string&&, openmode)): Likewise.
 777         (basic_stringbuf::basic_stringbuf(basic_stringbuf&&, allocator const&)):
 778         Likewise.
 779         (basic_stringbuf::get_allocator()): New method.
 780         (basic_stringbuf::view()): Likewise.
 781         (basic_istringstream::basic_istringstream(basic_string&&, openmode)):
 782         New constructor.
 783         (basic_istringstream::basic_istringstream(openmode, allocator const&)):
 784         Likewise
 785         (basic_istringstream::view()): New method.
 786         (basic_ostringstream::basic_ostringstream(basic_string&&, openmode)):
 787         New constructor.
 788         (basic_ostringstream::basic_ostringstream(openmode, allocator const&)):
 789         Likewise
 790         (basic_ostringstream::view()): New method.
 791         (basic_stringstream::basic_stringstream(basic_string&&, openmode)):
 792         New constructor.
 793         (basic_stringstream::basic_stringstream(openmode, allocator const&)):
 794         Likewise
 795         (basic_stringstream::view()): New method.
 796         * src/Makefile.in: Add c++20 directory.
 797         * src/Makefile.am: Regenerate.
 798         * src/c++20/Makefile.am: Add makefile for new sub-directory.
 799         * src/c++20/Makefile.in: Generate.
 800         * src/c++20/sstream-inst.cc: New file defining explicit
 801         instantiations for basic_stringbuf, basic_istringstream,
 802         basic_ostringstream, and basic_stringstream member functions
 803         added in C++20.
 804         * testsuite/27_io/basic_stringbuf/cons/char/2.cc: New test.
 805         * testsuite/27_io/basic_stringbuf/cons/wchar_t/2.cc: Likewise.
 806         * testsuite/27_io/basic_stringbuf/view/char/1.cc: Likewise.
 807         * testsuite/27_io/basic_stringbuf/view/wchar_t/1.cc: Likewise.
 808         * testsuite/27_io/basic_istringstream/cons/char/1.cc: Likewise.
 809         * testsuite/27_io/basic_istringstream/cons/wchar_t/1.cc: Likewise.
 810         * testsuite/27_io/basic_istringstream/view/char/1.cc: Likewise.
 811         * testsuite/27_io/basic_istringstream/view/wchar_t/1.cc: Likewise.
 812         * testsuite/27_io/basic_ostringstream/cons/char/1.cc: Likewise.
 813         * testsuite/27_io/basic_ostringstream/cons/wchar_t/1.cc: Likewise.
 814         * testsuite/27_io/basic_ostringstream/view/char/1.cc: Likewise.
 815         * testsuite/27_io/basic_ostringstream/view/wchar_t/1.cc: Likewise.
 816         * testsuite/27_io/basic_stringstream/cons/char/1.cc: Likewise.
 817         * testsuite/27_io/basic_stringstream/cons/wchar_t/1.cc: Likewise.
 818         * testsuite/27_io/basic_stringstream/view/char/1.cc: Likewise.
 819         * testsuite/27_io/basic_stringstream/view/wchar_t/1.cc: Likewise.
 820
 821 2020-10-28  Patrick Palka  <ppalka@redhat.com>
 822
 823         PR libstdc++/97613
 824         * include/std/chrono (year_month_weekday::operator sys_days):
 825         Cast the result of index() to int so that the initializer for
 826         days{} is sign-extended when it's converted to the underlying
 827         type.
 828         * testsuite/std/time/year_month_weekday/3.cc: New test.
 829
 830 2020-10-28  Jonathan Wakely  <jwakely@redhat.com>
 831
 832         * libsupc++/new_opnt.cc (new): Add comment about forced unwind
 833         exceptions.
 834
 835 2020-10-28  Jonathan Wakely  <jwakely@redhat.com>
 836
 837         PR libstdc++/94268
 838         * config/os/mingw32-w64/os_defines.h (_GLIBCXX_BUFSIZ):
 839         Define.
 840         * config/os/mingw32/os_defines.h (_GLIBCXX_BUFSIZ):
 841         Define.
 842         * include/bits/fstream.tcc: Use _GLIBCXX_BUFSIZ instead
 843         of BUFSIZ.
 844         * include/ext/stdio_filebuf.h: Likewise.
 845         * include/std/fstream (_GLIBCXX_BUFSIZ): Define.
 846
 847 2020-10-28  Jonathan Wakely  <jwakely@redhat.com>
 848
 849         PR libstdc++/95592
 850         * include/bits/valarray_after.h (_DEFINE_EXPR_UNARY_OPERATOR)
 851         (_DEFINE_EXPR_BINARY_OPERATOR, _DEFINE_EXPR_BINARY_FUNCTION):
 852         Use elaborated-type-specifier and qualified-id to avoid
 853         ambiguities with QNX system headers.
 854         * testsuite/26_numerics/valarray/95592.cc: New test.
 855
 856 2020-10-28  Jonathan Wakely  <jwakely@redhat.com>
 857
 858         PR libstdc++/95609
 859         * include/std/span (span): Reorder data members to match common
 860         implementations of struct iovec.
 861         * testsuite/23_containers/span/layout_compat.cc: New test.
 862
 863 2020-10-27  Jonathan Wakely  <jwakely@redhat.com>
 864
 865         * include/std/functional (std::_Placeholder): Define for C++98
 866         as well as later standards.
 867         * include/tr1/functional (std::placeholders::_1 etc): Declare
 868         for C++98.
 869         (tr1::_Placeholder): Replace with using-declaration for
 870         std::_Placeholder.
 871         (tr1::placeholders::_1 etc.): Replace with using-directive for
 872         std::placeholders.
 873
 874 2020-10-27  Jonathan Wakely  <jwakely@redhat.com>
 875
 876         * include/tr1/ell_integral.tcc (__ellint_rf, __ellint_rd)
 877         (__ellint_rc, __ellint_rj): Remove unused variables.
 878         * include/tr1/modified_bessel_func.tcc (__airy): Likewise.
 879
 880 2020-10-27  Jonathan Wakely  <jwakely@redhat.com>
 881
 882         * include/bits/locale_conv.h (__str_codecvt_out_all):
 883         Add cast to compare operands of the same signedness.
 884         * include/bits/locale_facets_nonio.tcc
 885         (time_get::_M_extract_wday_or_month): Likewise.
 886         * include/bits/sstream.tcc (basic_stringbuf::overflow):
 887         Likewise.
 888         * include/tr1/legendre_function.tcc (__sph_legendre): Use
 889         unsigned for loop variable.
 890
 891 2020-10-27  Jonathan Wakely  <jwakely@redhat.com>
 892
 893         * include/std/charconv (from_chars): Add noexcept to match
 894         definitions in src/c++17/floating_from_chars.cc
 895
 896 2020-10-27  Jonathan Wakely  <jwakely@redhat.com>
 897
 898         * src/c++17/fs_dir.cc (fs::directory_iterator::operator*):
 899         Add noexcept. Do not throw on precondition violation.
 900
 901 2020-10-27  Jonathan Wakely  <jwakely@redhat.com>
 902
 903         * include/bits/fs_path.h (path::_List::begin, path::_List::end):
 904         Add noexcept to match definitions in src/c++17/fs_path.cc.
 905
 906 2020-10-27  Jonathan Wakely  <jwakely@redhat.com>
 907
 908         * testsuite/experimental/memory_resource/new_delete_resource.cc:
 909         Add missing <cstdint> header.
 910         * testsuite/experimental/memory_resource/resource_adaptor.cc:
 911         Likewise.
 912
 913 2020-10-26  Jonathan Wakely  <jwakely@redhat.com>
 914
 915         * include/experimental/executor (strand::_State): Fix thinko.
 916
 917 2020-10-26  Ville Voutilainen  <ville.voutilainen@gmail.com>
 918
 919         * include/std/type_traits (__is_nt_constructible_impl): Remove.
 920         (__is_nothrow_constructible_impl): Adjust.
 921         (is_nothrow_default_constructible): Likewise.
 922         (__is_nt_assignable_impl): Remove.
 923         (__is_nothrow_assignable_impl): Adjust.
 924
 925 2020-10-26  Jonathan Wakely  <jwakely@redhat.com>
 926
 927         PR libstdc++/97570
 928         * libsupc++/new_opa.cc: Declare size_t in global namespace.
 929         Remove unused header.
 930
 931 2020-10-26  Stephan Bergmann  <sbergman@redhat.com>
 932
 933         * include/bits/shared_ptr_base.h
 934         (_Sp_counted_base::_M_add_ref_lock_nothrow(): Add noexcept to
 935         definitions to match declaration.
 936         (__shared_count(const __weak_count&, nothrow_t)): Add noexcept
 937         to declaration to match definition.
 938
 939 2020-10-23  Patrick Palka  <ppalka@redhat.com>
 940
 941         * include/std/ranges (single_view::single_view): Mark the
 942         in place constructor explicit as per LWG 3428.
 943         (take_view): Remove the constraint on the deduction guide's
 944         template parameter as per LWG 3447.
 945
 946 2020-10-23  Jonathan Wakely  <jwakely@redhat.com>
 947
 948         * include/experimental/memory_resource: Include <tuple>.
 949         (polymorphic_allocator::construct): Qualify forward_as_tuple.
 950         * include/std/memory_resource: Likewise.
 951
 952 2020-10-22  Jonathan Wakely  <jwakely@redhat.com>
 953
 954         * testsuite/30_threads/condition_variable/members/68519.cc:
 955         Define recent_epoch_float_clock::duration to meet the Cpp17Clock
 956         requirements.
 957
 958 2020-10-22  Jonathan Wakely  <jwakely@redhat.com>
 959
 960         * include/std/shared_mutex: Only include <condition_variable>
 961         when pthread_rwlock_t and POSIX timers are not available.
 962         (__cpp_lib_shared_mutex, __cpp_lib_shared_timed_mutex): Change
 963         value to be type 'long'.
 964         * include/std/version (__cpp_lib_shared_mutex)
 965         (__cpp_lib_shared_timed_mutex): Likewise.
 966
 967 2020-10-22  Jonathan Wakely  <jwakely@redhat.com>
 968
 969         * include/Makefile.am: Add new header.
 970         * include/Makefile.in: Regenerate.
 971         * include/bits/shared_ptr.h: Include <iosfwd>.
 972         * include/bits/shared_ptr_base.h: Include required headers here
 973         directly, instead of in <memory>.
 974         * include/bits/uses_allocator_args.h: New file. Move utility
 975         functions for uses-allocator construction from <memory> to here.
 976         Only define the utility functions when concepts are available.
 977         (__cpp_lib_make_obj_using_allocator): Define non-standard
 978         feature test macro.
 979         * include/std/condition_variable: Remove unused headers.
 980         * include/std/future: Likewise.
 981         * include/std/memory: Remove headers that are not needed
 982         directly, and are now inclkuded where they're needed. Include
 983         new <bits/uses_allocator_args.h> header.
 984         * include/std/memory_resource: Include only the necessary
 985         headers. Use new feature test macro to detect support for the
 986         utility functions.
 987         * include/std/scoped_allocator: Likewise.
 988         * include/std/version (__cpp_lib_make_obj_using_allocator):
 989         Define.
 990
 991 2020-10-22  Olivier Hainque  <hainque@adacore.com>
 992
 993         * crossconfig.m4: Turn vxworks matcher into vxworks*.
 994         * configure.host: Likewise.
 995         * configure: Regenerate.
 996
 997 2020-10-21  Jonathan Wakely  <jwakely@redhat.com>
 998
 999         * include/bits/shared_ptr.h (shared_ptr(const weak_ptr&, nothrow_t)):
1000         Add noexcept.
1001         * include/bits/shared_ptr_base.h (_Sp_counted_base::_M_add_ref_lock):
1002         Remove specializations and just call _M_add_ref_lock_nothrow.
1003         (__shared_count, __shared_ptr): Use nullptr for null pointer
1004         constants.
1005         (__shared_count(const __weak_count&)): Use _M_add_ref_lock_nothrow
1006         instead of _M_add_ref_lock.
1007         (__shared_count(const __weak_count&, nothrow_t)): Add noexcept.
1008         (__shared_ptr::operator bool()): Add noexcept.
1009         (__shared_ptr(const __weak_ptr&, nothrow_t)): Add noexcept.
1010
1011 2020-10-21  Jonathan Wakely  <jwakely@redhat.com>
1012
1013         PR libstdc++/97512
1014         * include/bits/ranges_util.h (tuple_size<subrange>)
1015         (tuple_element<I, cv subrange>): Move here from ...
1016         * include/std/ranges: ... here.
1017         * testsuite/std/ranges/subrange/97512.cc: New test.
1018
1019 2020-10-21  Thomas Rodgers  <trodgers@redhat.com>
1020
1021         * include/pstl/algorithm_impl.h: Update file.
1022         * include/pstl/execution_impl.h: Likewise.
1023         * include/pstl/glue_algorithm_impl.h: Likewise.
1024         * include/pstl/glue_memory_impl.h: Likewise.
1025         * include/pstl/glue_numeric_impl.h: Likewise.
1026         * include/pstl/memory_impl.h: Likewise.
1027         * include/pstl/numeric_impl.h: Likewise.
1028         * include/pstl/parallel_backend.h: Likewise.
1029         * include/pstl/parallel_backend_serial.h: Likewise.
1030         * include/pstl/parallel_backend_tbb.h: Likewise.
1031         * include/pstl/parallel_backend_utils.h: Likewise.
1032         * include/pstl/pstl_config.h: Likewise.
1033         * include/pstl/unseq_backend_simd.h: Likewise.
1034
1035 2020-10-20  François Dumont  <fdumont@gcc.gnu.org>
1036
1037         * include/bits/hashtable_policy.h
1038         (_Hash_node_value_base<>): Remove _Hash_node_base inheritance.
1039         (_Hash_node_code_cache<bool _Cache_hash_code>): New.
1040         (_Hash_node_value<typename _Value, bool _Cache_hash_code>): New.
1041         (_Hash_node<>): Inherits _Hash_node_base<> and _Hash_node_value<>.
1042         (_Map_base<>::__node_type): Remove.
1043         (_Map_base<>::iterator): Remove.
1044         (_Insert_base<>::__hash_cached): New.
1045         (_Insert_base<>::__constant_iterators): New.
1046         (_Insert_base<>::__hashtable_alloc): New.
1047         (_Insert_base<>::__node_type): Remove.
1048         (_Insert_base<>::__node_ptr): New.
1049         (_Hash_code_base<>): Remove specializations.
1050         (_Hash_code_base<>::__node_type): Remove.
1051         (_Hash_code_base<>::_M_bucket_index(const __node_type*, size_t)):
1052         Replace by...
1053         (_Hash_code_base<>::_M_bucket_index(const _Hash_node_value<>&, size_t)):
1054         ...this.
1055         (_Hash_code_base<>::_M_store_code(__node_type*, __hash_code)):
1056         Replace by...
1057         (_Hash_code_base<>::_M_store_code(_Hash_node_code_cache<>&, __hash_code)):
1058         ...this.
1059         (_Hash_code_base<>::_M_copy_code(__node_type*, const __node_type*)):
1060         Replace by...
1061         (_Hash_code_base<>::_M_copy_code(_Hash_node_code_cache<>&,
1062         const _Hash_node_code_base<>&)): ...this.
1063         (_Hashtable_base<>::__constant_iterators): Remove.
1064         (_Hashtable_base<>::__unique_keys): Remove.
1065         (_Hashtable_base<>::__node_type): Remove.
1066         (_Hashtable_base<>::iterator): Remove.
1067         (_Hashtable_base<>::const_iterator): Remove.
1068         (_Hashtable_base<>::local_iterator): Remove.
1069         (_Hashtable_base<>::const_local_iterator): Remove.
1070         (_Hashtable_base<>::__ireturn_type): Remove.
1071         (_Hashtable_base<>::_Equal_hash_code<>::_S_equals): Replace by...
1072         (_Hashtable_base<>::_S_equals(__hash_code, const _Hash_node_code_hash<>&)):
1073         ...this.
1074         (_Hashtable_base<>::_Equal_hash_code<>::_S_node_equals): Replace by...
1075         (_Hashtable_base<>::_S_node_equals(__hash_code,
1076         const _Hash_node_code_hash<>&)): ...this.
1077         (_Hashtable_base<>::_Equal_hash_code<>): Remove.
1078         (_Hashtable_base<>::_M_equals): Adapt.
1079         (_Hashtable_baxe<>::_M_node_equals): Adapt.
1080         (_Equality<>::_M_equal): Adapt.
1081         (_Hashtable_alloc<>::__node_ptr): New.
1082         (_Hashtable_alloc<>::__bucket_type): Rename into...
1083         (_Hashtable_alloc<>::__node_base_ptr): ...this.
1084         (_Hashtable_alloc<>::__bucket_alloc_type): Rename into...
1085         (_Hashtable_alloc<>::__buckets_alloc_type): ...this.
1086         (_Hashtable_alloc<>::__bucket_alloc_traits): Rename into...
1087         (_Hashtable_alloc<>::__buckets_alloc_traits): ...this.
1088         (_Hashtable_alloc<>::__buckets_ptr): New.
1089         (_Hashtable_alloc<>::_M_allocate_node): Adapt.
1090         (_Hashtable_alloc<>::_M_deallocate_node): Adapt.
1091         (_Hashtable_alloc<>::_M_deallocate_node_ptr): Adapt.
1092         (_Hashtable_alloc<>::_M_deallocate_nodes): Adapt.
1093         (_Hashtable_alloc<>::_M_allocate_buckets): Adapt.
1094         (_Hashtable_alloc<>::_M_deallocate_buckets): Adapt.
1095         * include/bits/hashtable.h (_Hashtable<>): Adapt.
1096
1097 2020-10-20  Aldy Hernandez  <aldyh@redhat.com>
1098
1099         * testsuite/21_strings/basic_string/capacity/1.cc: Pass
1100         -Wno-stringop-overflow to test.
1101
1102 2020-10-20  Jonathan Wakely  <jwakely@redhat.com>
1103
1104         PR libstdc++/95917
1105         * include/std/coroutine (__noop_coro_frame): Replace with
1106         noop_coroutine_handle::__frame.
1107         (__dummy_resume_destroy): Define inline in __frame.
1108         (__noop_coro_fr): Replace with noop_coroutine_handle::_S_fr
1109         and define as inline.
1110         * testsuite/18_support/coroutines/95917.cc: New test.
1111
1112 2020-10-20  Jonathan Wakely  <jwakely@redhat.com>
1113
1114         * include/std/coroutine (coroutine_handle<_Promise>): Remove
1115         base class. Add constructors, conversions, accessors etc. as
1116         proposed for LWG 3460.
1117         (coroutine_handle<noop_coroutine_promise>): Likewise.
1118         * testsuite/18_support/coroutines/lwg3460.cc: New test.
1119
1120 2020-10-19  Jonathan Wakely  <jwakely@redhat.com>
1121
1122         * include/bits/unique_ptr.h (make_unique_for_overwrite): Define
1123         for C++20.
1124         * testsuite/20_util/unique_ptr/creation/array_neg.cc: Remove
1125         unused header. Adjust standard reference.
1126         * testsuite/20_util/unique_ptr/creation/for_overwrite.cc: New test.
1127         * testsuite/20_util/unique_ptr/creation/for_overwrite__neg.cc: New test.
1128
1129 2020-10-19  Jonathan Wakely  <jwakely@redhat.com>
1130
1131         * include/std/tuple (_Head_base<Idx, Head, true>): Use reserved
1132         form of __no_unique_address__ attribute because
1133         no_unique_address is not reserved prior to C++20.
1134
1135 2020-10-19  Jonathan Wakely  <jwakely@redhat.com>
1136
1137         * include/bits/node_handle.h (_Node_handle_common): Replace
1138         std::optional with custom type.
1139         * testsuite/20_util/variant/exception_safety.cc: Add missing
1140         header include.
1141
1142 2020-10-19  Jonathan Wakely  <jwakely@redhat.com>
1143
1144         * include/precompiled/expc++.h: Removed.
1145
1146 2020-10-17  Ville Voutilainen  <ville.voutilainen@gmail.com>
1147
1148         PR libstdc++/97449
1149         * include/std/variant
1150         (__gen_vtable_impl<>::_S_apply_single_alt):
1151         Diagnose visitor return type mismatches here..
1152         (__gen_vtable_impl</*base case*/>::_S_apply):
1153         ..not here.
1154
1155 2020-10-15  Jonathan Wakely  <jwakely@redhat.com>
1156
1157         * include/std/concepts: Fix typos in copyright notice.
1158         * include/std/ranges: Likewise.
1159
1160 2020-10-14  Jonathan Wakely  <jwakely@redhat.com>
1161
1162         PR libstdc++/97415
1163         * include/std/sstream (basic_stringbuf::str()): Check for
1164         null egptr() before comparing to non-null pptr().
1165
1166 2020-10-14  Jonathan Wakely  <jwakely@redhat.com>
1167
1168         * testsuite/21_strings/basic_string/modifiers/assign/char/move_assign_optim.cc:
1169         Do not generate debug info.
1170         * testsuite/21_strings/basic_string/modifiers/assign/wchar_t/move_assign_optim.cc:
1171         Likewise.
1172
1173 2020-10-14  Jonathan Wakely  <jwakely@redhat.com>
1174
1175         * include/bits/basic_string.h (basic_string(const Alloc&))
1176         (basic_string(const basic_string&)
1177         (basic_string(const CharT*, size_type, const Alloc&))
1178         (basic_string(const CharT*, const Alloc&))
1179         (basic_string(size_type, CharT, const Alloc&))
1180         (basic_string(initializer_list<CharT>, const Alloc&))
1181         (basic_string(InputIterator, InputIterator, const Alloc&)):
1182         Define inline in class body.
1183         * include/bits/basic_string.tcc (basic_string(const Alloc&))
1184         (basic_string(const basic_string&)
1185         (basic_string(const CharT*, size_type, const Alloc&))
1186         (basic_string(const CharT*, const Alloc&))
1187         (basic_string(size_type, CharT, const Alloc&))
1188         (basic_string(initializer_list<CharT>, const Alloc&))
1189         (basic_string(InputIterator, InputIterator, const Alloc&)):
1190         Move definitions into class body.
1191
1192 2020-10-14  Jonathan Wakely  <jwakely@redhat.com>
1193
1194         * testsuite/lib/libstdc++.exp (check_effective_target_cxx11-abi):
1195         Add comments about which test flags get used by the check.
1196
1197 2020-10-14  Jonathan Wakely  <jwakely@redhat.com>
1198
1199         * testsuite/21_strings/basic_string/allocator/char/copy.cc: Make
1200         comment more precise about what isn't supported by COW strings.
1201         * testsuite/21_strings/basic_string/allocator/char/copy_assign.cc:
1202         Likewise.
1203         * testsuite/21_strings/basic_string/allocator/char/move.cc:
1204         Likewise.
1205         * testsuite/21_strings/basic_string/allocator/char/move_assign.cc:
1206         Likewise.
1207         * testsuite/21_strings/basic_string/allocator/char/noexcept.cc:
1208         Likewise.
1209         * testsuite/21_strings/basic_string/allocator/char/operator_plus.cc:
1210         Likewise.
1211         * testsuite/21_strings/basic_string/allocator/char/swap.cc:
1212         Likewise.
1213         * testsuite/21_strings/basic_string/allocator/wchar_t/copy.cc:
1214         Likewise.
1215         * testsuite/21_strings/basic_string/allocator/wchar_t/copy_assign.cc:
1216         Likewise.
1217         * testsuite/21_strings/basic_string/allocator/wchar_t/move.cc:
1218         Likewise.
1219         * testsuite/21_strings/basic_string/allocator/wchar_t/move_assign.cc:
1220         Likewise.
1221         * testsuite/21_strings/basic_string/allocator/wchar_t/noexcept.cc:
1222         Likewise.
1223         * testsuite/21_strings/basic_string/allocator/wchar_t/operator_plus.cc:
1224         Likewise.
1225         * testsuite/21_strings/basic_string/allocator/wchar_t/swap.cc:
1226         Likewise.
1227
1228 2020-10-14  Jonathan Wakely  <jwakely@redhat.com>
1229
1230         * testsuite/21_strings/basic_string/allocator/char/minimal.cc:
1231         Do not require cxx11-abi effective target.
1232         * testsuite/21_strings/basic_string/allocator/wchar_t/minimal.cc:
1233         Likewise.
1234         * testsuite/27_io/basic_fstream/cons/base.cc: Likewise.
1235
1236 2020-10-14  Jonathan Wakely  <jwakely@redhat.com>
1237
1238         * include/bits/basic_string.h [!_GLIBCXX_USE_CXX11_ABI]
1239         (basic_string(const _CharT*, const _Alloc&)): Constrain to
1240         require an allocator-like type to fix CTAD ambiguity (LWG 3706).
1241         * testsuite/21_strings/basic_string/cons/char/deduction.cc:
1242         Remove dg-skip-if.
1243         * testsuite/21_strings/basic_string/cons/wchar_t/deduction.cc:
1244         Likewise.
1245
1246 2020-10-13  Nuno Lopes  <nuno.lopes@ist.utl.pt>
1247
1248         * include/bits/stl_algo.h (any_of): Fix incorrect description
1249         in comment.
1250
1251 2020-10-13  Jonathan Wakely  <jwakely@redhat.com>
1252
1253         * doc/xml/manual/evolution.xml: Document some API changes
1254         and deprecations.
1255         * doc/xml/manual/intro.xml: Document LWG 2499.
1256         * doc/xml/manual/status_cxx2020.xml: Update status.
1257         * doc/html/*: Regenerate.
1258
1259 2020-10-13  Jonathan Wakely  <jwakely@redhat.com>
1260
1261         * doc/xml/book.txml: Remove trailing whitespace.
1262         * doc/xml/chapter.txml: Likewise.
1263         * doc/xml/class.txml: Likewise.
1264         * doc/xml/gnu/fdl-1.3.xml: Likewise.
1265         * doc/xml/gnu/gpl-3.0.xml: Likewise.
1266         * doc/xml/manual/abi.xml: Likewise.
1267         * doc/xml/manual/algorithms.xml: Likewise.
1268         * doc/xml/manual/allocator.xml: Likewise.
1269         * doc/xml/manual/appendix_contributing.xml: Likewise.
1270         * doc/xml/manual/appendix_free.xml: Likewise.
1271         * doc/xml/manual/appendix_porting.xml: Likewise.
1272         * doc/xml/manual/atomics.xml: Likewise.
1273         * doc/xml/manual/auto_ptr.xml: Likewise.
1274         * doc/xml/manual/backwards_compatibility.xml: Likewise.
1275         * doc/xml/manual/bitmap_allocator.xml: Likewise.
1276         * doc/xml/manual/build_hacking.xml: Likewise.
1277         * doc/xml/manual/codecvt.xml: Likewise.
1278         * doc/xml/manual/concurrency.xml: Likewise.
1279         * doc/xml/manual/concurrency_extensions.xml: Likewise.
1280         * doc/xml/manual/configure.xml: Likewise.
1281         * doc/xml/manual/containers.xml: Likewise.
1282         * doc/xml/manual/ctype.xml: Likewise.
1283         * doc/xml/manual/debug.xml: Likewise.
1284         * doc/xml/manual/debug_mode.xml: Likewise.
1285         * doc/xml/manual/diagnostics.xml: Likewise.
1286         * doc/xml/manual/documentation_hacking.xml: Likewise.
1287         * doc/xml/manual/evolution.xml: Likewise.
1288         * doc/xml/manual/internals.xml: Likewise.
1289         * doc/xml/manual/intro.xml: Likewise.
1290         * doc/xml/manual/io.xml: Likewise.
1291         * doc/xml/manual/iterators.xml: Likewise.
1292         * doc/xml/manual/locale.xml: Likewise.
1293         * doc/xml/manual/localization.xml: Likewise.
1294         * doc/xml/manual/messages.xml: Likewise.
1295         * doc/xml/manual/mt_allocator.xml: Likewise.
1296         * doc/xml/manual/numerics.xml: Likewise.
1297         * doc/xml/manual/parallel_mode.xml: Likewise.
1298         * doc/xml/manual/policy_data_structures.xml: Likewise.
1299         * doc/xml/manual/prerequisites.xml: Likewise.
1300         * doc/xml/manual/shared_ptr.xml: Likewise.
1301         * doc/xml/manual/spine.xml: Likewise.
1302         * doc/xml/manual/status_cxxtr1.xml: Likewise.
1303         * doc/xml/manual/status_cxxtr24733.xml: Likewise.
1304         * doc/xml/manual/strings.xml: Likewise.
1305         * doc/xml/manual/support.xml: Likewise.
1306         * doc/xml/manual/test.xml: Likewise.
1307         * doc/xml/manual/test_policy_data_structures.xml: Likewise.
1308         * doc/xml/manual/using.xml: Likewise.
1309         * doc/xml/manual/using_exceptions.xml: Likewise.
1310         * doc/xml/manual/utilities.xml: Likewise.
1311         * doc/html/*: Regenerate.
1312
1313 2020-10-12  Patrick Palka  <ppalka@redhat.com>
1314
1315         * include/std/ranges (take_while_view::begin): Constrain the
1316         const overload further as per LWG 3450.
1317         (take_while_view::end): Likewise.
1318         * testsuite/std/ranges/adaptors/take_while.cc: Add test for LWG
1319         3450.
1320
1321 2020-10-12  Patrick Palka  <ppalka@redhat.com>
1322
1323         PR libstdc++/95322
1324         * include/std/ranges (take_view::_CI): Define this alias
1325         template as per LWG 3449 and remove ...
1326         (take_view::_Sentinel::_CI): ... this type alias.
1327         (take_view::_Sentinel::operator==): Adjust use of _CI
1328         accordingly.  Define a second overload that accepts an iterator
1329         of the opposite constness as per LWG 3449.
1330         (take_while_view::_Sentinel::operator==): Likewise.
1331         * testsuite/std/ranges/adaptors/95322.cc: Add tests for LWG 3449.
1332
1333 2020-10-12  Jonathan Wakely  <jwakely@redhat.com>
1334
1335         * doc/doxygen/user.cfg.in: Update to Doxygen 1.8.20 format.
1336
1337 2020-10-12  Jonathan Wakely  <jwakely@redhat.com>
1338
1339         * doc/doxygen/user.cfg.in (PREDEFINED): Use __cplusplus=201703L
1340         so that C++17 features are documented.
1341
1342 2020-10-12  Jonathan Wakely  <jwakely@redhat.com>
1343
1344         * include/bits/stl_algobase.h (copy, move, copy_backward)
1345         (move_backward): Fix documentation for returned iterator.
1346
1347 2020-10-12  Martin Sebor  <msebor@redhat.com>
1348
1349         PR c++/97201
1350         * libsupc++/new (operator new): Add attribute alloc_size and malloc.
1351
1352 2020-10-11  Clement Chigot  <clement.chigot@atos.net>
1353
1354         * config/os/aix/t-aix: Add complementary mode object file to
1355         libstdc++fs.a
1356
1357 2020-10-10  Jonathan Wakely  <jwakely@redhat.com>
1358
1359         PR libstdc++/97362
1360         * doc/html/manual/source_code_style.html: Regenerate.
1361         * doc/xml/manual/appendix_contributing.xml: Add __deref to
1362         BADNAMES.
1363         * include/debug/functions.h (_Irreflexive_checker::__deref):
1364         Rename to __ref.
1365         * testsuite/17_intro/badnames.cc: Check __deref.
1366
1367 2020-10-10  Ville Voutilainen  <ville.voutilainen@gmail.com>
1368
1369         * include/std/variant (__check_visitor_result):
1370         Use size_t for indexes.
1371         (__check_visitor_results): Likewise.
1372
1373 2020-10-09  Ville Voutilainen  <ville.voutilainen@gmail.com>
1374
1375         PR libstdc++/95904
1376         * include/std/variant (__deduce_visit_result): Add a nested ::type.
1377         (__gen_vtable_impl</*base case*/>::_S_apply):
1378         Check the visitor return type.
1379         (__same_types): New.
1380         (__check_visitor_result): Likewise.
1381         (__check_visitor_results): Likewise.
1382         (visit(_Visitor&&, _Variants&&...)): Use __check_visitor_results
1383         in case we're visiting just one variant.
1384         * testsuite/20_util/variant/visit_neg.cc: Adjust.
1385
1386 2020-10-09  Jonathan Wakely  <jwakely@redhat.com>
1387
1388         PR libstdc++/97311
1389         * include/bits/random.tcc (seed_seq::generate): Use uint32_t for
1390         calculations. Also split the first loop into three loops to
1391         avoid branching on k on every iteration, resolving PR 94823.
1392         * testsuite/26_numerics/random/seed_seq/97311.cc: New test.
1393         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-erro
1394         line number.
1395
1396 2020-10-09  Daniel Lemire  <lemire@gmail.com>
1397
1398         * include/bits/uniform_int_dist.h (uniform_int_distribution::_S_nd):
1399         New member function implementing Lemire's "nearly divisionless"
1400         algorithm.
1401         (uniform_int_distribution::operator()): Use _S_nd when the range
1402         of the URBG is the full width of the result type.
1403
1404 2020-10-09  Jonathan Wakely  <jwakely@redhat.com>
1405
1406         * testsuite/Makefile.am: Set and export variable separately.
1407         * testsuite/Makefile.in: Regenerate.
1408
1409 2020-10-09  Jonathan Wakely  <jwakely@redhat.com>
1410
1411         * scripts/check_performance: Use gnu++11 instead of gnu++0x.
1412         * testsuite/Makefile.am (check-performance): Export CXXFLAGS to
1413         child process.
1414         * testsuite/Makefile.in: Regenerate.
1415
1416 2020-10-09  Jonathan Wakely  <jwakely@redhat.com>
1417
1418         * testsuite/performance/26_numerics/random_dist.cc: New test.
1419
1420 2020-10-09  Jonathan Wakely  <jwakely@redhat.com>
1421
1422         * testsuite/util/testsuite_performance.h (report_header): Remove
1423         unused variable.
1424
1425 2020-10-08  Patrick Palka  <ppalka@redhat.com>
1426
1427         PR libstdc++/95788
1428         * include/bits/ranges_uninitialized.h:
1429         (__construct_at_fn::operator()): Rewrite in terms of
1430         std::construct_at.  Declare it conditionally noexcept.  Qualify
1431         calls to declval in its requires-clause.
1432         * testsuite/20_util/specialized_algorithms/construct_at/95788.cc:
1433         New test.
1434
1435 2020-10-08  Jonathan Wakely  <jwakely@redhat.com>
1436
1437         PR libstdc++/82584
1438         * include/bits/random.tcc
1439         (discrete_distribution::param_type::_M_initialize)
1440         (piecewise_constant_distribution::param_type::_M_initialize)
1441         (piecewise_linear_distribution::param_type::_M_initialize):
1442         Add assertions for positive sums..
1443         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error
1444         line.
1445
1446 2020-10-08  Jonathan Wakely  <jwakely@redhat.com>
1447
1448         * include/bits/ios_base.h (ios_base::failure): Add constructors
1449         takeing error_code argument. Add code() member function.
1450         * testsuite/27_io/ios_base/failure/cxx11.cc: Allow test to
1451         run for the old ABI but do not check for derivation from
1452         std::system_error.
1453         * testsuite/27_io/ios_base/failure/error_code.cc: New test.
1454
1455 2020-10-08  Jonathan Wakely  <jwakely@redhat.com>
1456
1457         * include/bits/random.h (__detail::_Mod): Revert last change.
1458         (__detail::__mod): Do not use _Mod for a==0 case.
1459         * testsuite/26_numerics/random/linear_congruential_engine/operators/call.cc:
1460         Check other cases with a==0. Also check runtime results.
1461         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error
1462         line.
1463
1464 2020-10-07  Jonathan Wakely  <jwakely@redhat.com>
1465
1466         * include/bits/random.h (__detail::_Mod): Avoid divide by zero.
1467         * testsuite/26_numerics/random/linear_congruential_engine/operators/call.cc:
1468         New test.
1469
1470 2020-10-07  Jonathan Wakely  <jwakely@redhat.com>
1471
1472         * include/bits/random.h (seed_seq(initializer_list<T>)): Rename
1473         parameter to use reserved name.
1474         * include/bits/ranges_algo.h (shift_left, shift_right): Rename
1475         template parameters to use reserved name.
1476         * libsupc++/exception_ptr.h (exception_ptr): Likewise for
1477         parameters and local variables.
1478         * testsuite/17_intro/names.cc: Check "il". Do not check "d" and
1479         "y" in C++20 mode.
1480
1481 2020-10-06  Jonathan Wakely  <jwakely@redhat.com>
1482
1483         PR libstdc++/90295
1484         * config/abi/pre/gnu.ver (CXXABI_1.3.13): New symbol version.
1485         (exception_ptr::_M_addref(), exception_ptr::_M_release()):
1486         Export symbols.
1487         * libsupc++/eh_ptr.cc (exception_ptr::exception_ptr()):
1488         Remove out-of-line definition.
1489         (exception_ptr::exception_ptr(const exception_ptr&)):
1490         Likewise.
1491         (exception_ptr::~exception_ptr()): Likewise.
1492         (exception_ptr::operator=(const exception_ptr&)):
1493         Likewise.
1494         (exception_ptr::swap(exception_ptr&)): Likewise.
1495         (exception_ptr::_M_addref()): Add branch prediction.
1496         * libsupc++/exception_ptr.h (exception_ptr::operator bool):
1497         Add noexcept.
1498         [!_GLIBCXX_EH_PTR_COMPAT] (operator==, operator!=): Define
1499         inline as hidden friends. Remove declarations at namespace
1500         scope.
1501         (exception_ptr::exception_ptr()): Define inline.
1502         (exception_ptr::exception_ptr(const exception_ptr&)):
1503         Likewise.
1504         (exception_ptr::~exception_ptr()): Likewise.
1505         (exception_ptr::operator=(const exception_ptr&)):
1506         Likewise.
1507         (exception_ptr::swap(exception_ptr&)): Likewise.
1508         * testsuite/util/testsuite_abi.cc: Add CXXABI_1.3.13.
1509         * testsuite/18_support/exception_ptr/90295.cc: New test.
1510
1511 2020-10-06  Jonathan Wakely  <jwakely@redhat.com>
1512
1513         * include/std/ranges (join_view): Remove deduction guide.
1514         (views::join): Add explicit template argument list to prevent
1515         deducing the wrong type.
1516         * testsuite/std/ranges/adaptors/join.cc: Move test for LWG 3474
1517         here, from ...
1518         * testsuite/std/ranges/adaptors/join_lwg3474.cc: Removed.
1519
1520 2020-10-05  Jonathan Wakely  <jwakely@redhat.com>
1521
1522         * include/bits/regex.h: Use __int_traits<int> instead of
1523         std::numeric_limits<int>.
1524         * include/bits/uniform_int_dist.h: Use __int_traits<T>::__max
1525         instead of std::numeric_limits<T>::max().
1526         * include/bits/hashtable_policy.h: Use size_t(-1) instead of
1527         std::numeric_limits<size_t>::max().
1528         * include/std/regex: Include <ext/numeric_traits.h>.
1529         * include/std/string_view: Use typedef for __int_traits<int>.
1530         * src/c++11/hashtable_c++0x.cc: Use size_t(-1) instead of
1531         std::numeric_limits<size_t>::max().
1532         * testsuite/std/ranges/iota/96042.cc: Include <limits>.
1533         * testsuite/std/ranges/iota/difference_type.cc: Likewise.
1534         * testsuite/std/ranges/subrange/96042.cc: Likewise.
1535
1536 2020-10-05  Jonathan Wakely  <jwakely@redhat.com>
1537
1538         * include/std/numeric: Move all #include directives to the top
1539         of the header.
1540         * testsuite/26_numerics/gcd/gcd_neg.cc: Adjust dg-error line
1541         numbers.
1542         * testsuite/26_numerics/lcm/lcm_neg.cc: Likewise.
1543
1544 2020-10-05  Jonathan Wakely  <jwakely@redhat.com>
1545
1546         * config/abi/pre/gnu.ver: Add new symbol.
1547         * include/bits/functexcept.h (__throw_bad_array_new_length):
1548         Declare new function.
1549         * include/ext/malloc_allocator.h (malloc_allocator::allocate):
1550         Throw bad_array_new_length for impossible sizes (LWG 3190).
1551         * include/ext/new_allocator.h (new_allocator::allocate):
1552         Likewise.
1553         * include/std/memory_resource (polymorphic_allocator::allocate)
1554         (polymorphic_allocator::allocate_object): Use new function,
1555         __throw_bad_array_new_length.
1556         * src/c++11/functexcept.cc (__throw_bad_array_new_length):
1557         Define.
1558         * testsuite/20_util/allocator/lwg3190.cc: New test.
1559
1560 2020-10-05  Mike Crowe  <mac@mcrowe.com>
1561
1562         PR libstdc++/91486
1563         * include/bits/atomic_futex.h:
1564         (__atomic_futex_unsigned::_M_load_when_equal_until): Use target
1565         clock duration type when rounding.
1566         * testsuite/30_threads/async/async.cc (test_pr91486_wait_for):
1567         Rename from test_pr91486.
1568         (float_steady_clock): New class for test.
1569         (test_pr91486_wait_until): New test.
1570
1571 2020-10-05  Mike Crowe  <mac@mcrowe.com>
1572
1573         * testsuite/20_util/duration_cast/rounding_c++11.cc: Copy
1574         rounding.cc and alter to support compilation for C++11 and to
1575         test std::chrono::__detail::ceil.
1576
1577 2020-10-02  Jonathan Wakely  <jwakely@redhat.com>
1578
1579         * testsuite/29_atomics/atomic_float/value_init.cc: Use float
1580         instead of double so that __atomic_load_8 isn't needed.
1581
1582 2020-10-02  Jonathan Wakely  <jwakely@redhat.com>
1583
1584         * testsuite/18_support/96817.cc: Use terminate handler that
1585         calls _Exit(0).
1586
1587 2020-10-02  Patrick Palka  <ppalka@redhat.com>
1588
1589         * include/bits/stl_iterator.h (reverse_iterator::iter_move):
1590         Define for C++20 as per P0896.
1591         (reverse_iterator::iter_swap): Likewise.
1592         (move_iterator::operator*): Apply P0896 changes for C++20.
1593         (move_iterator::operator[]): Likewise.
1594         * testsuite/24_iterators/reverse_iterator/cust.cc: New test.
1595
1596 2020-10-01  Jonathan Wakely  <jwakely@redhat.com>
1597
1598         * config/cpu/arm/cxxabi_tweaks.h (_GLIBCXX_GUARD_TEST_AND_ACQUIRE):
1599         Do not try to dereference return value of __atomic_load_n.
1600
1601 2020-09-30  Jonathan Wakely  <jwakely@redhat.com>
1602
1603         * config/cpu/arm/cxxabi_tweaks.h (_GLIBCXX_GUARD_TEST_AND_ACQUIRE):
1604         (_GLIBCXX_GUARD_SET_AND_RELEASE): Define for EABI.
1605
1606 2020-09-30  Jonathan Wakely  <jwakely@redhat.com>
1607
1608         * include/bits/c++config (_GLIBCXX_HAVE_BUILTIN_IS_SAME):
1609         Define for GCC 11 or when !__is_identifier(__is_same).
1610         (_GLIBCXX_BUILTIN_IS_SAME_AS): Remove.
1611         * include/std/type_traits (is_same, is_same_v): Replace uses
1612         of _GLIBCXX_BUILTIN_IS_SAME_AS.
1613
1614 2020-09-28  Patrick Palka  <ppalka@redhat.com>
1615
1616         * include/std/ranges (filter_view): Declare the data member
1617         _M_base last instead of first, and adjust constructors' member
1618         initializer lists accordingly.
1619         (transform_view): Likewise.
1620         (take_view): Likewise.
1621         (take_while_view): Likewise.
1622         (drop_view): Likewise.
1623         (drop_while_view): Likewise.
1624         (join_view): Likewise.
1625         (split_view): Likewise (and tweak nearby formatting).
1626         (reverse_view): Likewise.
1627         * testsuite/std/ranges/adaptors/sizeof.cc: Update expected
1628         sizes.
1629
1630 2020-09-28  Patrick Palka  <ppalka@redhat.com>
1631
1632         * testsuite/std/ranges/adaptors/sizeof.cc: New test.
1633
1634 2020-09-28  Patrick Palka  <ppalka@redhat.com>
1635
1636         * include/bits/ranges_util.h (subrange::_M_end): Give it
1637         [[no_unique_address]].
1638         * testsuite/std/ranges/subrange/sizeof.cc: New test.
1639
1640 2020-09-28  Patrick Palka  <ppalka@redhat.com>
1641
1642         * include/std/ranges (iota_view::_M_bound): Give it
1643         [[no_unique_address]].
1644         * testsuite/std/ranges/iota/iota_view.cc: Check that an
1645         unbounded iota_view has minimal size.
1646
1647 2020-09-27  Clement Chigot  <clement.chigot@atos.net>
1648
1649         * config/os/aix/t-aix: Use $(AR) without -X32_64.
1650
1651 2020-09-26  Jonathan Wakely  <jwakely@redhat.com>
1652
1653         PR libstdc++/96817
1654         * include/ext/atomicity.h (__gnu_cxx::__is_single_threaded()):
1655         New function wrapping __libc_single_threaded if available.
1656         (__exchange_and_add_dispatch, __atomic_add_dispatch): Use it.
1657         * libsupc++/guard.cc (__cxa_guard_acquire, __cxa_guard_abort)
1658         (__cxa_guard_release): Likewise.
1659         * testsuite/18_support/96817.cc: New test.
1660
1661 2020-09-25  Jonathan Wakely  <jwakely@redhat.com>
1662
1663         * libsupc++/Makefile.am: Remove redundant -std=gnu++1z flags.
1664         * libsupc++/Makefile.in: Regenerate.
1665
1666 2020-09-24  Antony Polukhin  <antoshkka@gmail.com>
1667
1668         PR libstdc++/71579
1669         * include/std/type_traits (invoke_result, is_invocable)
1670         (is_invocable_r, is_nothrow_invocable, is_nothrow_invocable_r):
1671         Add static_asserts to make sure that the arguments of the type
1672         traits are not misused with incomplete types.
1673         * testsuite/20_util/invoke_result/incomplete_args_neg.cc: New test.
1674         * testsuite/20_util/is_invocable/incomplete_args_neg.cc: New test.
1675         * testsuite/20_util/is_invocable/incomplete_neg.cc: New test.
1676         * testsuite/20_util/is_nothrow_invocable/incomplete_args_neg.cc:
1677         New test.
1678         * testsuite/20_util/is_nothrow_invocable/incomplete_neg.cc: Check
1679         for error on incomplete type usage in trait.
1680
1681 2020-09-24  Patrick Palka  <ppalka@redhat.com>
1682
1683         * include/std/ranges (__detail::__boxable): Split out the
1684         associated constraints of __box into here.
1685         (__detail::__box): Use the __boxable concept.  Define a leaner
1686         partial specialization for semiregular types.
1687         (single_view::_M_value): Give it [[no_unique_address]].
1688         (filter_view::_M_pred): Likewise.
1689         (transform_view::_M_fun): Likewise.
1690         (take_while_view::_M_pred): Likewise.
1691         (drop_while_view::_M_pred):: Likewise.
1692         * testsuite/std/ranges/adaptors/detail/semiregular_box.cc: New
1693         test.
1694
1695 2020-09-24  Jonathan Wakely  <jwakely@redhat.com>
1696
1697         * doc/xml/manual/configure.xml: Correct name of option.
1698         * doc/html/*: Regenerate.
1699
1700 2020-09-22  Jonathan Wakely  <jwakely@redhat.com>
1701
1702         PR libstdc++/97167
1703         * src/c++17/fs_path.cc (path::_Parser::root_path()): Check
1704         for empty string before inspecting the first character.
1705         * testsuite/27_io/filesystem/path/append/source.cc: Append
1706         empty string_view to path.
1707
1708 2020-09-22  Glen Joseph Fernandes  <glenjofe@gmail.com>
1709
1710         * include/bits/align.h (align): Fix overflow handling.
1711         * testsuite/20_util/align/3.cc: New test.
1712
1713 2020-09-22  Jonathan Wakely  <jwakely@redhat.com>
1714
1715         * include/Makefile.am: Add new headers and adjust for renamed
1716         header.
1717         * include/Makefile.in: Regenerate.
1718         * include/bits/iterator_concepts.h: Adjust for renamed header.
1719         * include/bits/range_access.h (ranges::*): Move to new
1720         <bits/ranges_base.h> header.
1721         * include/bits/ranges_algobase.h: Include new <bits/ranges_base.h>
1722         header instead of <ranges>.
1723         * include/bits/ranges_algo.h: Include new <bits/ranges_util.h>
1724         header.
1725         * include/bits/range_cmp.h: Moved to...
1726         * include/bits/ranges_cmp.h: ...here.
1727         * include/bits/ranges_base.h: New header.
1728         * include/bits/ranges_util.h: New header.
1729         * include/experimental/string_view: Include new
1730         <bits/ranges_base.h> header.
1731         * include/std/functional: Adjust for renamed header.
1732         * include/std/ranges (ranges::view_base, ranges::enable_view)
1733         (ranges::dangling, ranges::borrowed_iterator_t): Move to new
1734         <bits/ranges_base.h> header.
1735         (ranges::view_interface, ranges::subrange)
1736         (ranges::borrowed_subrange_t): Move to new <bits/ranges_util.h>
1737         header.
1738         * include/std/span: Include new <bits/ranges_base.h> header.
1739         * include/std/string_view: Likewise.
1740         * testsuite/24_iterators/back_insert_iterator/pr93884.cc: Add
1741         missing <ranges> header.
1742         * testsuite/24_iterators/front_insert_iterator/pr93884.cc:
1743         Likewise.
1744
1745 2020-09-22  Jonathan Wakely  <jwakely@redhat.com>
1746
1747         PR libstdc++/96803
1748         * include/std/tuple
1749         (_Tuple_impl(allocator_arg_t, Alloc, const _Tuple_impl<U...>&)):
1750         Use correct value category in __use_alloc call.
1751         * testsuite/20_util/tuple/cons/96803.cc: Check with constructors
1752         that require correct value category to be used.
1753
1754 2020-09-22  Patrick Palka  <ppalka@redhat.com>
1755
1756         * include/std/span (span::front): Remove static_assert.
1757         (span::back): Likewise.
1758         (span::operator[]): Likewise.
1759         * testsuite/23_containers/span/back_neg.cc: Rewrite to verify
1760         that we check the preconditions of back() only when it's called.
1761         * testsuite/23_containers/span/front_neg.cc: Likewise for
1762         front().
1763         * testsuite/23_containers/span/index_op_neg.cc: Likewise for
1764         operator[].
1765
1766 2020-09-22  Patrick Palka  <ppalka@redhat.com>
1767
1768         * include/bits/stl_algo.h (__sample): Exit early when the
1769         input range is empty.
1770         * testsuite/25_algorithms/sample/3.cc: New test.
1771
1772 2020-09-22  Patrick Palka  <ppalka@redhat.com>
1773
1774         * include/bits/stl_algo.h (for_each_n): Mark constexpr for C++20.
1775         (search): Likewise for the overload that takes a searcher.
1776         * testsuite/25_algorithms/for_each/constexpr.cc: Test constexpr
1777         std::for_each_n.
1778         * testsuite/25_algorithms/search/constexpr.cc: Test constexpr
1779         std::search overload that takes a searcher.
1780
1781 2020-09-21  Jonathan Wakely  <jwakely@redhat.com>
1782
1783         * include/bits/c++config (__replacement_assert): Add noreturn
1784         attribute.
1785         (__glibcxx_assert_impl): Use __builtin_expect to hint that the
1786         assertion is expected to pass.
1787
1788 2020-09-21  Jonathan Wakely  <jwakely@redhat.com>
1789
1790         * include/std/ranges (drop_view::begin()): Adjust constraints
1791         to match the correct condition for O(1) ranges::next (LWG 3482).
1792         * testsuite/std/ranges/adaptors/drop.cc: Check that iterator is
1793         cached for non-sized_range.
1794
1795 2020-09-21  Jonathan Wakely  <jwakely@redhat.com>
1796
1797         * include/std/ranges (transform_view, elements_view): Relax
1798         constraints on operator- for iterators, as per LWG 3483.
1799         * testsuite/std/ranges/adaptors/elements.cc: Check that we
1800         can take the difference of two iterators from a non-random
1801         access range.
1802         * testsuite/std/ranges/adaptors/transform.cc: Likewise.
1803
1804 2020-09-21  Jonathan Wakely  <jwakely@redhat.com>
1805
1806         PR libstdc++/97132
1807         * include/bits/align.h (align) [!_GLIBCXX_USE_C99_STDINT_TR1]:
1808         Remove unused code.
1809         (assume_aligned): Do not use __builtin_assume_aligned during
1810         constant evaluation.
1811         * testsuite/20_util/assume_aligned/1.cc: Improve test.
1812         * testsuite/20_util/assume_aligned/97132.cc: New test.
1813
1814 2020-09-20  Jonathan Wakely  <jwakely@redhat.com>
1815
1816         PR libstdc++/97101
1817         * include/std/functional (bind_front): Fix order of parameters
1818         in is_nothrow_constructible_v specialization.
1819         * testsuite/20_util/function_objects/bind_front/97101.cc: New test.
1820
1821 2020-09-11  Thomas Rodgers  <trodgers@redhat.com>
1822
1823         * include/std/memory: Move #include <bits/align.h> inside C++11
1824         conditional includes.
1825
1826 2020-09-11  Thomas Rodgers  <trodgers@redhat.com>
1827
1828         * include/Makefile.am (bits_headers): Add new header.
1829         * include/Makefile.in: Regenerate.
1830         * include/bits/align.h: New file.
1831         * include/std/memory (align): Move definition to bits/align.h.
1832         (assume_aligned): Likewise.
1833
1834 2020-09-11  Jonathan Wakely  <jwakely@redhat.com>
1835
1836         * include/std/chrono [C++17] (chrono::__detail::ceil): Add
1837         using declaration to make chrono::ceil available for internal
1838         use with a consistent name.
1839         (chrono::__detail::__ceil_impl): New function template.
1840         (chrono::__detail::ceil): Use __ceil_impl to compare and
1841         increment the value. Remove SFINAE constraint.
1842
1843 2020-09-11  Jonathan Wakely  <jwakely@redhat.com>
1844
1845         * include/bits/regex_error.h (__throw_regex_error): Fix
1846         parameter declaration and use reserved attribute names.
1847
1848 2020-09-11  Mike Crowe  <mac@mcrowe.com>
1849
1850         * include/std/condition_variable (condition_variable::wait_until):
1851         Convert delta to steady_clock duration before adding to current
1852         steady_clock time to avoid rounding errors described in PR68519.
1853         (condition_variable::wait_for): Simplify calculation of absolute
1854         time by using chrono::__detail::ceil in both overloads.
1855         * testsuite/30_threads/condition_variable/members/68519.cc:
1856         (test_wait_for): Renamed from test01. Replace unassigned val
1857         variable with constant false. Reduce scope of mx and cv
1858         variables to just test_wait_for function.
1859         (test_wait_until): Add new test case.
1860
1861 2020-09-11  Mike Crowe  <mac@mcrowe.com>
1862
1863         PR libstdc++/91486
1864         * include/bits/atomic_futex.h
1865         (__atomic_futex_unsigned::_M_load_when_equal_for)
1866         (__atomic_futex_unsigned::_M_load_when_equal_until): Use
1867         __detail::ceil to convert delta to the reference clock
1868         duration type to avoid resolution problems.
1869         * include/std/chrono (__detail::ceil): Move implementation
1870         of std::chrono::ceil into private namespace so that it's
1871         available to pre-C++17 code.
1872         * testsuite/30_threads/async/async.cc (test_pr91486):
1873         Test __atomic_futex_unsigned::_M_load_when_equal_for.
1874
1875 2020-09-11  Mike Crowe  <mac@mcrowe.com>
1876
1877         * include/bits/atomic_futex.h
1878         (__atomic_futex_unsigned::_M_load_when_equal_until): Add
1879         loop on generic _Clock to check the timeout against _Clock
1880         again after _M_load_when_equal_until returns indicating a
1881         timeout.
1882         * testsuite/30_threads/async/async.cc: Invent slow_clock
1883         that runs at an eleventh of steady_clock's speed. Use it
1884         to test the user-supplied-clock variant of
1885         __atomic_futex_unsigned::_M_load_when_equal_until works
1886         generally with test03 and loops correctly when the timeout
1887         time hasn't been reached in test04.
1888
1889 2020-09-11  Mike Crowe  <mac@mcrowe.com>
1890
1891         PR libstdc++/93542
1892         * include/bits/atomic_futex.h (__atomic_futex_unsigned): Change
1893         __clock_t typedef to use steady_clock so that unknown clocks are
1894         synced to it rather than system_clock. Change existing __clock_t
1895         overloads of _M_load_and_text_until_impl and
1896         _M_load_when_equal_until to use system_clock explicitly. Remove
1897         comment about DR 887 since these changes address that problem as
1898         best as we currently able.
1899
1900 2020-09-11  Mike Crowe  <mac@mcrowe.com>
1901
1902         PR libstdc++/93542
1903         * config/abi/pre/gnu.ver: Update for addition of
1904         __atomic_futex_unsigned_base::_M_futex_wait_until_steady.
1905         * include/bits/atomic_futex.h (__atomic_futex_unsigned_base):
1906         Add comments to clarify that _M_futex_wait_until and
1907         _M_load_and_test_until use CLOCK_REALTIME.
1908         (__atomic_futex_unsigned_base::_M_futex_wait_until_steady)
1909         (__atomic_futex_unsigned_base::_M_load_and_text_until_steady):
1910         New member functions that use CLOCK_MONOTONIC.
1911         (__atomic_futex_unsigned_base::_M_load_and_test_until_impl)
1912         (__atomic_futex_unsigned_base::_M_load_when_equal_until): Add
1913         overloads that accept a steady_clock time_point and use the
1914         new member functions.
1915         * src/c++11/futex.cc: Include headers required for
1916         clock_gettime.
1917         (futex_clock_monotonic_flag): New constant to tell futex to
1918         use CLOCK_MONOTONIC to match existing futex_clock_realtime_flag.
1919         (futex_clock_monotonic_unavailable): New global to store the
1920         result of trying to use CLOCK_MONOTONIC.
1921         (__atomic_futex_unsigned_base::_M_futex_wait_until_steady): Add
1922         new variant of _M_futex_wait_until that uses CLOCK_MONOTONIC to
1923         support waiting using steady_clock.
1924
1925 2020-09-11  Mike Crowe  <mac@mcrowe.com>
1926
1927         * src/c++11/futex.cc: Add new constants for required futex
1928         flags.  Add futex_clock_realtime_unavailable flag to store
1929         result of trying to use FUTEX_CLOCK_REALTIME.
1930         (__atomic_futex_unsigned_base::_M_futex_wait_until): Try to
1931         use FUTEX_WAIT_BITSET with FUTEX_CLOCK_REALTIME and only
1932         fall back to using gettimeofday and FUTEX_WAIT if that's not
1933         supported.
1934
1935 2020-09-11  Mike Crowe  <mac@mcrowe.com>
1936
1937         * testsuite/30_threads/async/async.cc (test02): Test steady_clock
1938         with std::future::wait_until.
1939         (test03): Add new test templated on clock type waiting for future
1940         associated with async to resolve.
1941         (main): Call test03 to test both system_clock and steady_clock.
1942
1943 2020-09-11  Torbjörn SVENSSON  <torbjorn.svensson@st.com>
1944             Christophe Lyon  <christophe.lyon@linaro.org>
1945
1946         * libsupc++/eh_call.cc: Avoid warning with -fno-exceptions.
1947
1948 2020-09-11  Torbjörn SVENSSON  <torbjorn.svensson@st.com>
1949             Christophe Lyon  <christophe.lyon@linaro.org>
1950
1951         * libsupc++/eh_call.cc: Avoid warning with -fno-exceptions.
1952
1953 2020-09-11  Christophe Lyon  <christophe.lyon@linaro.org>
1954
1955         * include/bits/regex_error.h: Avoid warning with -fno-exceptions.
1956
1957 2020-09-10  Jonathan Wakely  <jwakely@redhat.com>
1958
1959         * include/bits/locale_conv.h (__do_str_codecvt, __str_codecvt_in_all):
1960         Add casts to compare types of the same signedness.
1961
1962 2020-09-10  Jonathan Wakely  <jwakely@redhat.com>
1963
1964         * include/bits/ranges_algobase.h (__equal_fn): Remove unused
1965         typedef.
1966
1967 2020-09-10  Jonathan Wakely  <jwakely@redhat.com>
1968
1969         * include/std/version (__cpp_lib_array_constexpr):
1970         (__cpp_lib_constexpr_char_traits): Only define C++17 value when
1971         compiling C++17.
1972
1973 2020-09-10  Jonathan Wakely  <jwakely@redhat.com>
1974
1975         * include/experimental/bits/shared_ptr.h (shared_ptr(auto_ptr&&))
1976         (operator=(auto_ptr&&)): Add diagnostic pragmas to suppress
1977         warnings for uses of std::auto_ptr.
1978         * include/experimental/type_traits (is_literal_type_v):
1979         Likewise, for use of std::is_literal_type.
1980         * include/std/condition_variable (condition_variable_any::_Unlock):
1981         Likewise, for use of std::uncaught_exception.
1982
1983 2020-09-10  Jonathan Wakely  <jwakely@redhat.com>
1984
1985         * include/bits/fs_path.h (path::_List::type()): Avoid narrowing
1986         conversion.
1987         * include/std/chrono (operator+(const year&, const years&)):
1988         Likewise.
1989
1990 2020-09-10  Jonathan Wakely  <jwakely@redhat.com>
1991
1992         * include/bits/codecvt.h (codecvt_byname): Remove names of
1993         unused parameters.
1994
1995 2020-09-10  Jonathan Wakely  <jwakely@redhat.com>
1996
1997         * include/bits/locale_facets_nonio.tcc: Adjust whitespace.
1998
1999 2020-09-10  Krystian Kuźniarek  <krystian.kuzniarek@gmail.com>
2000
2001         * include/c_global/cmath (__lerp): Avoid -Wparentheses warnings.
2002
2003 2020-09-10  Krystian Kuźniarek  <krystian.kuzniarek@gmail.com>
2004
2005         * include/bits/atomic_base.h: Fix -Wunused-variable
2006         warnings.
2007         * include/ext/new_allocator.h: Fix -Wunused-parameter
2008         warnings.
2009
2010 2020-09-10  Jonathan Wakely  <jwakely@redhat.com>
2011
2012         * include/bits/stl_iterator.h (counted_iterator): Add assertions
2013         to check preconditions added by LWG 3472.
2014
2015 2020-09-10  Jonathan Wakely  <jwakely@redhat.com>
2016
2017         PR libstdc++/94160
2018         * src/c++17/memory_resource.cc (munge_options): Round
2019         max_blocks_per_chunk to a multiple of four.
2020         (__pool_resource::_M_alloc_pools()): Simplify slightly.
2021         * testsuite/20_util/unsynchronized_pool_resource/allocate.cc:
2022         Check that valid pointers are returned when small values are
2023         used for max_blocks_per_chunk.
2024
2025 2020-09-10  Jonathan Wakely  <jwakely@redhat.com>
2026
2027         PR libstdc++/96942
2028         * include/std/memory_resource (monotonic_buffer_resource::do_allocate):
2029         Use __builtin_expect when checking if a new buffer needs to be
2030         allocated from the upstream resource, and for checks for edge
2031         cases like zero sized buffers and allocations.
2032         * src/c++17/memory_resource.cc (aligned_size): New class template.
2033         (aligned_ceil): New helper function to round up to a given
2034         alignment.
2035         (monotonic_buffer_resource::chunk): Replace _M_size and _M_align
2036         with an aligned_size member. Remove _M_canary member. Change _M_next
2037         to pointer instead of unaligned buffer.
2038         (monotonic_buffer_resource::chunk::allocate): Round up to multiple
2039         of 64 instead of to power of two. Check for size overflow. Remove
2040         redundant check for minimum required alignment.
2041         (monotonic_buffer_resource::chunk::release): Adjust for changes
2042         to data members.
2043         (monotonic_buffer_resource::_M_new_buffer): Use aligned_ceil.
2044         (big_block): Replace _M_size and _M_align with aligned_size
2045         member.
2046         (big_block::big_block): Check for size overflow.
2047         (big_block::size, big_block::align): Adjust to use aligned_size.
2048         (big_block::alloc_size): Use aligned_ceil.
2049         (munge_options): Use aligned_ceil.
2050         (__pool_resource::allocate): Use big_block::align for alignment.
2051         * testsuite/20_util/monotonic_buffer_resource/allocate.cc: Check
2052         upstream resource gets expected values for impossible sizes.
2053         * testsuite/20_util/unsynchronized_pool_resource/allocate.cc:
2054         Likewise. Adjust checks for expected alignment in existing test.
2055
2056 2020-09-07  Jonathan Wakely  <jwakely@redhat.com>
2057
2058         * include/std/chrono (duration::_S_gcd): Use invariant that
2059         neither value is zero initially.
2060
2061 2020-09-07  Jonathan Wakely  <jwakely@redhat.com>
2062
2063         * include/std/ranges (__box): Simplify constraints as per LWG 3477.
2064
2065 2020-09-03  Jonathan Wakely  <jwakely@redhat.com>
2066
2067         PR libstdc++/96592
2068         * include/std/tuple (_TupleConstraints<true, T...>): Use
2069         alternative is_constructible instead of std::is_constructible.
2070         * testsuite/20_util/tuple/cons/96592.cc: New test.
2071
2072 2020-09-03  Jonathan Wakely  <jwakely@redhat.com>
2073
2074         * include/std/chrono (duration::_S_gcd): Use iterative algorithm
2075         for C++14 and later.
2076         * include/std/numeric (__detail::__gcd): Replace recursive
2077         Euclidean algorithm with iterative version of binary GCD algorithm.
2078         * testsuite/26_numerics/gcd/1.cc: Test additional inputs.
2079         * testsuite/26_numerics/gcd/gcd_neg.cc: Adjust dg-error lines.
2080         * testsuite/26_numerics/lcm/lcm_neg.cc: Likewise.
2081         * testsuite/experimental/numeric/gcd.cc: Test additional inputs.
2082         * testsuite/26_numerics/gcd/2.cc: New test.
2083
2084 2020-09-02  Jonathan Wakely  <jwakely@redhat.com>
2085
2086         PR libstdc++/92978
2087         * testsuite/experimental/numeric/92978.cc: Use experimental::lcm
2088         not std::lcm.
2089
2090 2020-09-02  Jonathan Wakely  <jwakely@redhat.com>
2091
2092         PR libstdc++/96851
2093         * include/bits/cpp_type_traits.h (__is_memcmp_ordered):
2094         New trait that says if memcmp can be used for ordering.
2095         (__is_memcmp_ordered_with): Likewise, for two types.
2096         * include/bits/deque.tcc (__lex_cmp_dit): Use new traits
2097         instead of __is_byte and __numeric_traits.
2098         (__lexicographical_compare_aux1): Likewise.
2099         * include/bits/ranges_algo.h (__lexicographical_compare_fn):
2100         Likewise.
2101         * include/bits/stl_algobase.h (__lexicographical_compare_aux1)
2102         (__is_byte_iter): Likewise.
2103         * include/std/array (operator<=>): Likewise. Only use memcmp
2104         when std::is_constant_evaluated() is false.
2105         * testsuite/23_containers/array/comparison_operators/96851.cc:
2106         New test.
2107         * testsuite/23_containers/array/tuple_interface/get_neg.cc:
2108         Adjust dg-error line numbers.
2109
2110 2020-09-02  Jonathan Wakely  <jwakely@redhat.com>
2111
2112         * include/bits/stl_iterator.h: Include <bits/exception_defines.h>
2113         for definitions of __try, __catch and __throw_exception_again.
2114         (counted_iterator::operator++(int)): Use __throw_exception_again
2115         instead of throw.
2116         * libsupc++/new: Include <bits/exception.h> not <exception>.
2117         * libsupc++/new_opvnt.cc: Include <bits/exception_defines.h>.
2118         * testsuite/18_support/destroying_delete.cc: Include
2119         <type_traits> for std::is_same_v definition.
2120         * testsuite/20_util/variant/index_type.cc: Qualify size_t.
2121
2122 2020-09-01  Jonathan Wakely  <jwakely@redhat.com>
2123
2124         PR libstdc++/71960
2125         * include/bits/c++config (__glibcxx_assert_impl): Remove
2126         do-while so that uses of the macro need to add it.
2127         (__glibcxx_assert): Rename macro for runtime assertions
2128         to __glibcxx_assert_2.
2129         (__glibcxx_assert_1): Define macro for constexpr assertions.
2130         (__glibcxx_assert): Define macro for constexpr and runtime
2131         assertions.
2132         * include/bits/range_access.h (ranges::advance): Remove
2133         redundant precondition checks during constant evaluation.
2134         * include/parallel/base.h (_GLIBCXX_PARALLEL_ASSERT): Always
2135         use do-while in macro expansion.
2136         * include/std/ranges (iota_view::iota_view(W, B)): Remove
2137         redundant braces.
2138
2139 2020-09-01  Jonathan Wakely  <jwakely@redhat.com>
2140
2141         * include/std/chrono (duration::_S_gcd(intmax_t, intmax_t)):
2142         New helper function for finding GCD of two positive intmax_t
2143         values.
2144         (duration::__divide): New helper alias for dividing one period
2145         by another.
2146         (duration::__is_harmonic): Use __divide not ratio_divide.
2147         (duration(const duration<R2, P2>&)): Require the duration rep
2148         types to be convertible.
2149         * testsuite/20_util/duration/cons/dr2094.cc: New test.
2150         * testsuite/20_util/duration/requirements/reduced_period.cc:
2151         Fix definition of unused member functions in test type.
2152         * testsuite/20_util/duration/requirements/typedefs_neg2.cc:
2153         Adjust expected errors.
2154
2155 2020-08-29  Jonathan Wakely  <jwakely@redhat.com>
2156
2157         * include/std/numeric (__detail::__absu(bool)): Make deleted
2158         function a function template, so it will be chosen for calls
2159         with an explicit template argument list.
2160         * testsuite/26_numerics/gcd/gcd_neg.cc: Add dg-prune-output.
2161         * testsuite/26_numerics/lcm/lcm_neg.cc: Likewise.
2162
2163 2020-08-28  Jonathan Wakely  <jwakely@redhat.com>
2164
2165         * include/std/chrono (common_type): Fix partial specializations
2166         for a single duration type to use the common_type of the rep.
2167         (duration::operator+, duration::operator-): Fix return types
2168         to also use the common_type of the rep.
2169         * testsuite/20_util/duration/requirements/reduced_period.cc:
2170         Check duration using a rep that has common_type specialized.
2171
2172 2020-08-28  Jonathan Wakely  <jwakely@redhat.com>
2173
2174         PR libstdc++/92978
2175         * include/std/numeric (__abs_integral): Replace with ...
2176         (__detail::__absu): New function template that returns an
2177         unsigned type, guaranteeing it can represent the most
2178         negative signed value.
2179         (__detail::__gcd, __detail::__lcm): Require arguments to
2180         be unsigned and therefore already non-negative.
2181         (gcd, lcm): Convert arguments to absolute value as unsigned
2182         type before calling __detail::__gcd or __detail::__lcm.
2183         * include/experimental/numeric (gcd, lcm): Likewise.
2184         * testsuite/26_numerics/gcd/gcd_neg.cc: Adjust expected
2185         errors.
2186         * testsuite/26_numerics/lcm/lcm_neg.cc: Likewise.
2187         * testsuite/26_numerics/gcd/92978.cc: New test.
2188         * testsuite/26_numerics/lcm/92978.cc: New test.
2189         * testsuite/experimental/numeric/92978.cc: New test.
2190
2191 2020-08-27  Jonathan Wakely  <jwakely@redhat.com>
2192
2193         * include/std/chrono (__duration_common_type): Ensure the
2194         reduced ratio is used. Remove unused partial specialization
2195         using __failure_type.
2196         (common_type): Pass reduced ratios to __duration_common_type.
2197         Add partial specializations for simple cases involving a single
2198         duration or time_point type.
2199         (duration::period): Use reduced ratio.
2200         (duration::operator+(), duration::operator-()): Return duration
2201         type using the reduced ratio.
2202         * testsuite/20_util/duration/requirements/typedefs_neg2.cc:
2203         Adjust expected errors.
2204         * testsuite/20_util/duration/requirements/reduced_period.cc: New test.
2205
2206 2020-08-27  Patrick Palka  <ppalka@redhat.com>
2207
2208         * include/std/chrono (year_month::operator+): Properly handle a
2209         month value of 0 by casting the month value to int before
2210         subtracting 1 from it so that the difference is sign-extended in
2211         the subsequent addition.
2212         * testsuite/std/time/year_month/1.cc: Test adding months to a
2213         year_month whose month component is below or above the
2214         normalized range of [1,12].
2215
2216 2020-08-27  Patrick Palka  <ppalka@redhat.com>
2217
2218         * include/std/chrono
2219         (__detail::__months_years_conversion_disambiguator): Define.
2220         (year_month::operator+=): Templatize the 'months'-based overload
2221         so that the 'years'-based overload is selected in case of
2222         equally-ranked implicit conversion sequences to both 'months'
2223         and 'years' from the supplied argument.
2224         (year_month::operator-=): Likewise.
2225         (year_month::operator+): Likewise.
2226         (year_month::operator-): Likewise.
2227         (year_month_day::operator+=): Likewise.
2228         (year_month_day::operator-=): Likewise.
2229         (year_month_day::operator+): Likewise.
2230         (year_month_day::operator-): Likewise.
2231         (year_month_day_last::operator+=): Likewise.
2232         (year_month_day_last::operator-=): Likewise.
2233         (year_month_day_last::operator+): Likewise
2234         (year_month_day_last::operator-): Likewise.
2235         (year_month_day_weekday::operator+=): Likewise
2236         (year_month_day_weekday::operator-=): Likewise.
2237         (year_month_day_weekday::operator+): Likewise.
2238         (year_month_day_weekday::operator-): Likewise.
2239         (year_month_day_weekday_last::operator+=): Likewise
2240         (year_month_day_weekday_last::operator-=): Likewise.
2241         (year_month_day_weekday_last::operator+): Likewise.
2242         (year_month_day_weekday_last::operator-): Likewise.
2243         (testsuite/std/time/year_month/2.cc): New test.
2244         (testsuite/std/time/year_month_day/2.cc): New test.
2245         (testsuite/std/time/year_month_day_last/2.cc): New test.
2246         (testsuite/std/time/year_month_weekday/2.cc): New test.
2247         (testsuite/std/time/year_month_weekday_last/2.cc): New test.
2248         * testsuite/std/time/year_month/2.cc: New file.
2249         * testsuite/std/time/year_month_day/2.cc: New file.
2250         * testsuite/std/time/year_month_day_last/2.cc: New file.
2251         * testsuite/std/time/year_month_weekday/2.cc: New file.
2252         * testsuite/std/time/year_month_weekday_last/2.cc: New file.
2253
2254 2020-08-27  Patrick Palka  <ppalka@redhat.com>
2255
2256         PR libstdc++/95322
2257         * include/std/ranges (transform_view::sentinel::__distance_from):
2258         Give this a deduced return type.
2259         (transform_view::sentinel::operator-): Adjust the return type so
2260         that it's based on the constness of the iterator rather than
2261         that of the sentinel.
2262         * testsuite/std/ranges/adaptors/95322.cc: Refer to LWG 3488.
2263
2264 2020-08-27  Patrick Palka  <ppalka@redhat.com>
2265
2266         * include/std/ranges (elements_view::begin): Adjust constraints.
2267         (elements_view::end): Likewise.
2268         (elements_view::_Sentinel::operator==): Templatize to take both
2269         _Iterator<true> and _Iterator<false>.
2270         (elements_view::_Sentinel::operator-): Likewise.
2271         * testsuite/std/ranges/adaptors/elements.cc: Add testcase for
2272         the example from P1994R1.
2273         * testsuite/std/ranges/adaptors/lwg3406.cc: New test.
2274
2275 2020-08-27  Patrick Palka  <ppalka@redhat.com>
2276
2277         * include/std/ranges (elements_view::end): Replace these two
2278         overloads with four new overloads.
2279         (elements_view::_Iterator::operator==): Remove.
2280         (elements_view::_Iterator::operator-): Likewise.
2281         (elements_view::_Sentinel): Define.
2282
2283 2020-08-26  Jonathan Wakely  <jwakely@redhat.com>
2284
2285         * include/std/tuple (_Tuple_impl): Whitespaces changes for
2286         consistent indentation. Also use __enable_if_t alias template.
2287
2288 2020-08-26  Jonathan Wakely  <jwakely@redhat.com>
2289
2290         PR libstdc++/96803
2291         * include/std/tuple
2292         (_Tuple_impl(allocator_arg_t, Alloc, const _Tuple_impl<U...>&)):
2293         Replace parameter pack with a type parameter and a pack and pass
2294         the first type to __use_alloc.
2295         * testsuite/20_util/tuple/cons/96803.cc: New test.
2296
2297 2020-08-26  Patrick Palka  <ppalka@redhat.com>
2298
2299         * include/std/chrono (year_month_weekday::operator==): Compare
2300         weekday_indexed instead of weekday.
2301         * testsuite/std/time/year_month_weekday/1.cc: Augment testcase.
2302
2303 2020-08-26  Jonathan Wakely  <jwakely@redhat.com>
2304
2305         * include/bits/hashtable_policy.h (_Hash_code_base): Change
2306         index of _Hashtable_ebo_helper base class.
2307         * testsuite/23_containers/unordered_map/dup_types.cc: New test.
2308
2309 2020-08-26  Jonathan Wakely  <jwakely@redhat.com>
2310
2311         PR libstdc++/71960
2312         * include/experimental/string_view (basic_string_view):
2313         Enable debug assertions.
2314         * include/std/string_view (basic_string_view):
2315         Likewise.
2316
2317 2020-08-26  François Dumont  <fdumont@gcc.gnu.org>
2318
2319         * include/bits/hashtable_policy.h (_Hashtable<>): Rename _H1 into _Hash
2320         _H2 into _RangeHash and _Hash into _Unused.
2321         (_Hastable_base<>): Likewise.
2322         (_Map_base<>): Likewise.
2323         (_Insert_base<>): Likewise.
2324         (_Insert<>): Likewise.
2325         (_Rehash_base<>): Likewise.
2326         (_Local_iterator_base<>): Likewise.
2327         (_Hash_code_base<>): Likewise.
2328         (_Hash_code_base<_Key, _Value, _ExtractKey, _H1, _H2, _Hash, false>):
2329         Remove.
2330         (_Hash_code_base<_Key, _Value, _ExtractKey, _H1, _H2, _Hash, true>):
2331         Remove.
2332         (_Hash_code_base<_Key, _Value, _ExtractKey, _Hash, _RangeHas, _Unused,
2333         bool>): Remove _Hashtable_ebo_helper<2, _RangeHash> base type..
2334         (_Hash_code_base<>::_M_bucket_index(const _Key&, __hash_code, size_t)):
2335         Replace by...
2336         (_Hash_code_base<>::_M_bucket_index(__hash_code, size_t)): ...this.
2337         (_Local_iterator<>): Remove _H1 and _H2 template parameters.
2338         (_Local_const_iterator<>): Likewise.
2339         (_Equality<>): Likewise.
2340         (_Map_base<>::operator[](const key_type&): Adapt.
2341         (_Map_base<>::operator[](key_type&&): Adapt.
2342         (_Identity::operator()): Add noexcept.
2343         (_Select1st::operator()): Likewise.
2344         (_Hash_code_base<>): Remove _Hashtable_ebo_helper<0, _ExtractKey> base
2345         type.
2346         (_Hash_code_base::_M_extract): Remove.
2347         * include/bits/hashtable.h (_Hashtable<>): Remove _H1 and _H2 template
2348         parameters. Remove _ExtractKey from constructors.
2349         (_Hashtable<>::_M_insert_unique_node(const key_type&, size_t,
2350         __hash_code, __node_type*, size_t)): Replace by...
2351         (_Hashtable<>::_M_insert_unique_node(size_t, __hash_code,
2352          __node_type*, size_t)): ...this.
2353         (_Hashtable<>::_M_insert_muti_node(__node_type*, const key_type&,
2354         __hash_code, __node_type*)): Replace by...
2355         (_Hashtable<>::_M_insert_multi_node(__node_type*, __hash_code,
2356         __node_type*)): ...this.
2357         (_Hashtable<>::__key_extract): Remove.
2358         * include/bits/node_handle.h: Adapt.
2359
2360 2020-08-25  Jonathan Wakely  <jwakely@redhat.com>
2361
2362         * testsuite/21_strings/debug/iterator_self_move_assign_neg.cc: Removed.
2363         * testsuite/21_strings/debug/self_move_assign_neg.cc: Removed.
2364         * testsuite/23_containers/deque/debug/iterator_self_move_assign_neg.cc: Removed.
2365         * testsuite/23_containers/deque/debug/self_move_assign_neg.cc: Removed.
2366         * testsuite/23_containers/forward_list/debug/iterator_self_move_assign_neg.cc: Removed.
2367         * testsuite/23_containers/forward_list/debug/self_move_assign_neg.cc: Removed.
2368         * testsuite/23_containers/list/debug/iterator_self_move_assign_neg.cc: Removed.
2369         * testsuite/23_containers/list/debug/self_move_assign_neg.cc: Removed.
2370         * testsuite/23_containers/map/debug/iterator_self_move_assign_neg.cc: Removed.
2371         * testsuite/23_containers/map/debug/self_move_assign_neg.cc: Removed.
2372         * testsuite/23_containers/multimap/debug/iterator_self_move_assign_neg.cc: Removed.
2373         * testsuite/23_containers/multimap/debug/self_move_assign_neg.cc: Removed.
2374         * testsuite/23_containers/multiset/debug/iterator_self_move_assign_neg.cc: Removed.
2375         * testsuite/23_containers/multiset/debug/self_move_assign_neg.cc: Removed.
2376         * testsuite/23_containers/set/debug/iterator_self_move_assign_neg.cc: Removed.
2377         * testsuite/23_containers/set/debug/self_move_assign_neg.cc: Removed.
2378         * testsuite/23_containers/unordered_map/debug/iterator_self_move_assign_neg.cc: Removed.
2379         * testsuite/23_containers/unordered_map/debug/self_move_assign_neg.cc: Removed.
2380         * testsuite/23_containers/unordered_multimap/debug/iterator_self_move_assign_neg.cc:
2381         Removed.
2382         * testsuite/23_containers/unordered_multimap/debug/self_move_assign_neg.cc: Removed.
2383         * testsuite/23_containers/unordered_multiset/debug/iterator_self_move_assign_neg.cc:
2384         Removed.
2385         * testsuite/23_containers/unordered_multiset/debug/self_move_assign_neg.cc: Removed.
2386         * testsuite/23_containers/unordered_set/debug/iterator_self_move_assign_neg.cc: Removed.
2387         * testsuite/23_containers/unordered_set/debug/self_move_assign_neg.cc: Removed.
2388         * testsuite/23_containers/vector/debug/iterator_self_move_assign_neg.cc: Removed.
2389         * testsuite/23_containers/vector/debug/self_move_assign_neg.cc: Removed.
2390
2391 2020-08-25  Patrick Palka  <ppalka@redhat.com>
2392
2393         * include/std/chrono (year_month_weekday::ok): Fix assert.
2394
2395 2020-08-25  Jonathan Wakely  <jwakely@redhat.com>
2396
2397         * include/std/future (future, shared_future. promise): Add
2398         is_destructible assertion (LWG 3466). Adjust string-literal for
2399         !is_array and !is_function assertions.
2400         * testsuite/30_threads/future/requirements/lwg3458.cc: Check
2401         types with no accessible destructor. Adjust expected errors.
2402         * testsuite/30_threads/promise/requirements/lwg3466.cc:
2403         Likewise.
2404         * testsuite/30_threads/shared_future/requirements/lwg3458.cc:
2405         Likewise.
2406
2407 2020-08-25  Patrick Palka  <ppalka@redhat.com>
2408             Ed Smith-Rowland  <3dw4rd@verizon.net>
2409             Jonathan Wakely  <jwakely@redhat.com>
2410
2411         * include/std/chrono (time_point::operator++)
2412         (time_point::operator--): Define.
2413         (utc_clock, tai_clock, gps_clock): Forward declare.
2414         (utc_time, utc_seconds, tai_time, tai_seconds, gps_time)
2415         (gps_seconds): Define.
2416         (is_clock<utc_clock>, is_clock<tai_clock>, is_clock<gps_clock>)
2417         (is_clock_v<utc_clock>, is_clock_v<tai_clock>)
2418         (is_clock_v<gps_clock>): Define these specializations.
2419         (leap_second_info): Define.
2420         (day, month, year, weekday, weekday_indexed)
2421         (weekday_last, month_day, month_day_last, month_weekday)
2422         (month_weekday_last, year_month, year_month_day)
2423         (year_month_day_last, year_month_weekday, year_month_weekday_last):
2424         Declare and later define.
2425         (last_spec, last, __detail::__days_per_month)
2426         (__detail::__days_per_month, __detail::__last_day): Define.
2427         (January, February, March, April, May, June, July, August)
2428         (September, October, November, December, Sunday, Monday, Tuesday)
2429         (Wednesday, Thursday, Friday, Saturday): Define.
2430         (weekday::operator[]): Define out-of-line.
2431         (year_month_day::_S_from_days, year_month_day::M_days_since_epoch):
2432         Likewise.
2433         (year_month_day::year_month_day, year_month_day::ok): Likewise.
2434         (__detail::__pow10, hh_mm_ss): Define.
2435         (literals::chrono_literals::operator""d)
2436         (literals::chrono_literals::operator""y): Define.
2437         (is_am, is_pm, make12, make24): Define.
2438         * testsuite/20_util/time_point/4.cc: New test.
2439         * testsuite/std/time/day/1.cc: New test.
2440         * testsuite/std/time/hh_mm_ss/1.cc: New test.
2441         * testsuite/std/time/is_am/1.cc: New test.
2442         * testsuite/std/time/is_pm/1.cc: New test.
2443         * testsuite/std/time/make12/1.cc: New test.
2444         * testsuite/std/time/make24/1.cc: New test.
2445         * testsuite/std/time/month/1.cc: New test.
2446         * testsuite/std/time/month_day/1.cc: New test.
2447         * testsuite/std/time/month_day_last/1.cc: New test.
2448         * testsuite/std/time/month_weekday/1.cc: New test.
2449         * testsuite/std/time/month_weekday_last/1.cc: New test.
2450         * testsuite/std/time/weekday/1.cc: New test.
2451         * testsuite/std/time/weekday_indexed/1.cc: New test.
2452         * testsuite/std/time/weekday_last/1.cc: New test.
2453         * testsuite/std/time/year/1.cc: New test.
2454         * testsuite/std/time/year_month/1.cc: New test.
2455         * testsuite/std/time/year_month_day/1.cc: New test.
2456         * testsuite/std/time/year_month_day_last/1.cc: New test.
2457         * testsuite/std/time/year_month_weekday/1.cc: New test.
2458         * testsuite/std/time/year_month_weekday_last/1.cc: New test.
2459
2460 2020-08-24  Jonathan Wakely  <jwakely@redhat.com>
2461
2462         * include/std/ranges (join_view): Add deduction guide (LWG 3474).
2463         * testsuite/std/ranges/adaptors/join_lwg3474.cc: New test.
2464
2465 2020-08-24  Jonathan Wakely  <jwakely@redhat.com>
2466
2467         * include/bits/iterator_concepts.h (indirectly_readable): Add
2468         partial specializations to resolve ambiguities (LWG 3446).
2469         * testsuite/24_iterators/associated_types/readable.traits.cc:
2470         Check types with both value_type and element_type.
2471
2472 2020-08-24  Jonathan Wakely  <jwakely@redhat.com>
2473
2474         * include/std/ranges (ranges::iota_view::size()): Perform all
2475         calculations in the right unsigned types.
2476         * testsuite/std/ranges/iota/size.cc: New test.
2477
2478 2020-08-24  Jonathan Wakely  <jwakely@redhat.com>
2479
2480         PR libstdc++/96766
2481         * include/std/variant (_Variant_storage): Replace implicit
2482         conversions from size_t to __index_type with explicit casts.
2483
2484 2020-08-24  Jonathan Wakely  <jwakely@redhat.com>
2485
2486         * testsuite/30_threads/packaged_task/cons/alloc.cc: Run for
2487         C++11 and skip for C++17 or later.
2488
2489 2020-08-24  Corentin Gay  <gay@adacore.com>
2490
2491         * testsuite/20_util/shared_ptr/atomic/3.cc: Do not require POSIX
2492         threads and add -pthread only on targets supporting them.
2493         * testsuite/20_util/shared_ptr/thread/default_weaktoshared.cc:
2494         Likewise.
2495         * testsuite/20_util/shared_ptr/thread/mutex_weaktoshared.cc:
2496         Likewise.
2497         * testsuite/30_threads/async/42819.cc: Likewise.
2498         * testsuite/30_threads/async/49668.cc: Likewise.
2499         * testsuite/30_threads/async/54297.cc: Likewise.
2500         * testsuite/30_threads/async/any.cc: Likewise.
2501         * testsuite/30_threads/async/async.cc: Likewise.
2502         * testsuite/30_threads/async/except.cc: Likewise.
2503         * testsuite/30_threads/async/launch.cc: Likewise.
2504         * testsuite/30_threads/async/lwg2021.cc: Likewise.
2505         * testsuite/30_threads/async/sync.cc: Likewise. : Likewise.
2506         * testsuite/30_threads/call_once/39909.cc: Likewise.
2507         * testsuite/30_threads/call_once/49668.cc: Likewise.
2508         * testsuite/30_threads/call_once/60497.cc: Likewise.
2509         * testsuite/30_threads/call_once/call_once1.cc: Likewise.
2510         * testsuite/30_threads/call_once/dr2442.cc: Likewise.
2511         * testsuite/30_threads/condition_variable/54185.cc: Likewise.
2512         * testsuite/30_threads/condition_variable/cons/1.cc: Likewise.
2513         * testsuite/30_threads/condition_variable/members/1.cc: Likewise.
2514         * testsuite/30_threads/condition_variable/members/2.cc: Likewise.
2515         * testsuite/30_threads/condition_variable/members/3.cc: Likewise.
2516         * testsuite/30_threads/condition_variable/members/53841.cc: Likewise.
2517         * testsuite/30_threads/condition_variable/members/68519.cc: Likewise.
2518         * testsuite/30_threads/condition_variable/native_handle/typesizes.cc:
2519         Likewise.
2520         * testsuite/30_threads/condition_variable_any/50862.cc: Likewise.
2521         * testsuite/30_threads/condition_variable_any/53830.cc: Likewise.
2522         * testsuite/30_threads/condition_variable_any/cond.cc: Likewise.
2523         * testsuite/30_threads/condition_variable_any/cons/1.cc: Likewise.
2524         * testsuite/30_threads/condition_variable_any/members/1.cc: Likewise.
2525         * testsuite/30_threads/condition_variable_any/members/2.cc: Likewise.
2526         * testsuite/30_threads/future/cons/move.cc: Likewise.
2527         * testsuite/30_threads/future/members/45133.cc: Likewise.
2528         * testsuite/30_threads/future/members/get.cc: Likewise.
2529         * testsuite/30_threads/future/members/get2.cc: Likewise.
2530         * testsuite/30_threads/future/members/share.cc: Likewise.
2531         * testsuite/30_threads/future/members/valid.cc: Likewise.
2532         * testsuite/30_threads/future/members/wait.cc: Likewise.
2533         * testsuite/30_threads/future/members/wait_for.cc: Likewise.
2534         * testsuite/30_threads/future/members/wait_until.cc: Likewise.
2535         * testsuite/30_threads/lock/1.cc: Likewise.
2536         * testsuite/30_threads/lock/2.cc: Likewise.
2537         * testsuite/30_threads/lock/3.cc: Likewise.
2538         * testsuite/30_threads/lock/4.cc: Likewise.
2539         * testsuite/30_threads/mutex/cons/1.cc: Likewise.
2540         * testsuite/30_threads/mutex/dest/destructor_locked.cc: Likewise.
2541         * testsuite/30_threads/mutex/lock/1.cc: Likewise.
2542         * testsuite/30_threads/mutex/native_handle/1.cc: Likewise.
2543         * testsuite/30_threads/mutex/native_handle/typesizes.cc: Likewise.
2544         * testsuite/30_threads/mutex/try_lock/1.cc: Likewise.
2545         * testsuite/30_threads/mutex/try_lock/2.cc: Likewise.
2546         * testsuite/30_threads/mutex/unlock/1.cc: Likewise.
2547         * testsuite/30_threads/mutex/unlock/2.cc: Likewise.
2548         * testsuite/30_threads/packaged_task/49668.cc: Likewise.
2549         * testsuite/30_threads/packaged_task/60564.cc: Likewise.
2550         * testsuite/30_threads/packaged_task/cons/1.cc: Likewise.
2551         * testsuite/30_threads/packaged_task/cons/2.cc: Likewise.
2552         * testsuite/30_threads/packaged_task/cons/3.cc: Likewise.
2553         * testsuite/30_threads/packaged_task/cons/56492.cc: Likewise.
2554         * testsuite/30_threads/packaged_task/cons/alloc.cc: Likewise.
2555         * testsuite/30_threads/packaged_task/cons/move.cc: Likewise.
2556         * testsuite/30_threads/packaged_task/cons/move_assign.cc: Likewise.
2557         * testsuite/30_threads/packaged_task/members/at_thread_exit.cc:
2558         Likewise.
2559         * testsuite/30_threads/packaged_task/members/get_future.cc: Likewise.
2560         * testsuite/30_threads/packaged_task/members/get_future2.cc: Likewise.
2561         * testsuite/30_threads/packaged_task/members/invoke.cc: Likewise.
2562         * testsuite/30_threads/packaged_task/members/invoke2.cc: Likewise.
2563         * testsuite/30_threads/packaged_task/members/invoke3.cc: Likewise.
2564         * testsuite/30_threads/packaged_task/members/invoke4.cc: Likewise.
2565         * testsuite/30_threads/packaged_task/members/invoke5.cc: Likewise.
2566         * testsuite/30_threads/packaged_task/members/reset.cc: Likewise.
2567         * testsuite/30_threads/packaged_task/members/reset2.cc: Likewise.
2568         * testsuite/30_threads/packaged_task/members/swap.cc: Likewise.
2569         * testsuite/30_threads/packaged_task/members/valid.cc: Likewise.
2570         * testsuite/30_threads/promise/60966.cc: Likewise.
2571         * testsuite/30_threads/promise/cons/1.cc: Likewise.
2572         * testsuite/30_threads/promise/cons/alloc.cc: Likewise.
2573         * testsuite/30_threads/promise/cons/move.cc: Likewise.
2574         * testsuite/30_threads/promise/cons/move_assign.cc: Likewise.
2575         * testsuite/30_threads/promise/members/at_thread_exit.cc: Likewise.
2576         * testsuite/30_threads/promise/members/at_thread_exit2.cc: Likewise.
2577         * testsuite/30_threads/promise/members/get_future.cc: Likewise.
2578         * testsuite/30_threads/promise/members/get_future2.cc: Likewise.
2579         * testsuite/30_threads/promise/members/set_exception.cc: Likewise.
2580         * testsuite/30_threads/promise/members/set_exception2.cc: Likewise.
2581         * testsuite/30_threads/promise/members/set_value.cc: Likewise.
2582         * testsuite/30_threads/promise/members/set_value2.cc: Likewise.
2583         * testsuite/30_threads/promise/members/set_value3.cc: Likewise.
2584         * testsuite/30_threads/promise/members/swap.cc: Likewise.
2585         * testsuite/30_threads/recursive_mutex/cons/1.cc: Likewise.
2586         * testsuite/30_threads/recursive_mutex/dest/destructor_locked.cc:
2587         Likewise.
2588         * testsuite/30_threads/recursive_mutex/lock/1.cc: Likewise.
2589         * testsuite/30_threads/recursive_mutex/native_handle/1.cc: Likewise.
2590         * testsuite/30_threads/recursive_mutex/native_handle/typesizes.cc:
2591         Likewise.
2592         * testsuite/30_threads/recursive_mutex/try_lock/1.cc: Likewise.
2593         * testsuite/30_threads/recursive_mutex/try_lock/2.cc: Likewise.
2594         * testsuite/30_threads/recursive_mutex/unlock/1.cc: Likewise.
2595         * testsuite/30_threads/recursive_mutex/unlock/2.cc: Likewise.
2596         * testsuite/30_threads/recursive_timed_mutex/cons/1.cc: Likewise.
2597         * testsuite/30_threads/recursive_timed_mutex/dest/destructor_locked.cc:
2598         Likewise.
2599         * testsuite/30_threads/recursive_timed_mutex/lock/1.cc: Likewise.
2600         * testsuite/30_threads/recursive_timed_mutex/lock/2.cc: Likewise.
2601         * testsuite/30_threads/recursive_timed_mutex/native_handle/1.cc:
2602         Likewise.
2603         * testsuite/30_threads/recursive_timed_mutex/native_handle/typesizes.cc:
2604         Likewise.
2605         * testsuite/30_threads/recursive_timed_mutex/try_lock/1.cc: Likewise.
2606         * testsuite/30_threads/recursive_timed_mutex/try_lock/2.cc: Likewise.
2607         * testsuite/30_threads/recursive_timed_mutex/try_lock_for/1.cc:
2608         Likewise.
2609         * testsuite/30_threads/recursive_timed_mutex/try_lock_for/2.cc:
2610         Likewise.
2611         * testsuite/30_threads/recursive_timed_mutex/try_lock_for/3.cc:
2612         Likewise.
2613         * testsuite/30_threads/recursive_timed_mutex/try_lock_until/1.cc:
2614         Likewise.
2615         * testsuite/30_threads/recursive_timed_mutex/try_lock_until/2.cc:
2616         Likewise.
2617         * testsuite/30_threads/recursive_timed_mutex/unlock/1.cc: Likewise.
2618         * testsuite/30_threads/recursive_timed_mutex/unlock/2.cc: Likewise.
2619         * testsuite/30_threads/shared_future/cons/move.cc: Likewise.
2620         * testsuite/30_threads/shared_future/members/45133.cc: Likewise.
2621         * testsuite/30_threads/shared_future/members/get.cc: Likewise.
2622         * testsuite/30_threads/shared_future/members/get2.cc: Likewise.
2623         * testsuite/30_threads/shared_future/members/valid.cc: Likewise.
2624         * testsuite/30_threads/shared_future/members/wait.cc: Likewise.
2625         * testsuite/30_threads/shared_future/members/wait_for.cc: Likewise.
2626         * testsuite/30_threads/shared_future/members/wait_until.cc: Likewise.
2627         * testsuite/30_threads/shared_lock/cons/1.cc: Likewise.
2628         * testsuite/30_threads/shared_lock/cons/2.cc: Likewise.
2629         * testsuite/30_threads/shared_lock/cons/3.cc: Likewise.
2630         * testsuite/30_threads/shared_lock/cons/4.cc: Likewise.
2631         * testsuite/30_threads/shared_lock/cons/5.cc: Likewise.
2632         * testsuite/30_threads/shared_lock/cons/6.cc: Likewise.
2633         * testsuite/30_threads/shared_lock/locking/1.cc: Likewise.
2634         * testsuite/30_threads/shared_lock/locking/2.cc: Likewise.
2635         * testsuite/30_threads/shared_lock/locking/3.cc: Likewise.
2636         * testsuite/30_threads/shared_lock/locking/4.cc: Likewise.
2637         * testsuite/30_threads/shared_lock/modifiers/1.cc: Likewise.
2638         * testsuite/30_threads/shared_mutex/cons/1.cc: Likewise.
2639         * testsuite/30_threads/shared_mutex/try_lock/1.cc: Likewise.
2640         * testsuite/30_threads/shared_mutex/try_lock/2.cc: Likewise.
2641         * testsuite/30_threads/shared_mutex/unlock/1.cc: Likewise.
2642         * testsuite/30_threads/shared_timed_mutex/cons/1.cc: Likewise.
2643         * testsuite/30_threads/shared_timed_mutex/try_lock/1.cc: Likewise.
2644         * testsuite/30_threads/shared_timed_mutex/try_lock/2.cc: Likewise.
2645         * testsuite/30_threads/shared_timed_mutex/try_lock/3.cc: Likewise.
2646         * testsuite/30_threads/shared_timed_mutex/unlock/1.cc: Likewise.
2647         * testsuite/30_threads/this_thread/1.cc: Likewise.
2648         * testsuite/30_threads/this_thread/sleep_for-mt.cc: Likewise.
2649         * testsuite/30_threads/this_thread/sleep_until-mt.cc: Likewise.
2650         * testsuite/30_threads/thread/cons/1.cc: Likewise.
2651         * testsuite/30_threads/thread/cons/2.cc: Likewise.
2652         * testsuite/30_threads/thread/cons/3.cc: Likewise.
2653         * testsuite/30_threads/thread/cons/4.cc: Likewise.
2654         * testsuite/30_threads/thread/cons/49668.cc: Likewise.
2655         * testsuite/30_threads/thread/cons/5.cc: Likewise.
2656         * testsuite/30_threads/thread/cons/6.cc: Likewise.
2657         * testsuite/30_threads/thread/cons/7.cc: Likewise.
2658         * testsuite/30_threads/thread/cons/8.cc: Likewise.
2659         * testsuite/30_threads/thread/cons/9.cc: Likewise.
2660         * testsuite/30_threads/thread/cons/moveable.cc: Likewise.
2661         * testsuite/30_threads/thread/cons/terminate.cc: Likewise.
2662         * testsuite/30_threads/thread/members/1.cc: Likewise.
2663         * testsuite/30_threads/thread/members/2.cc: Likewise.
2664         * testsuite/30_threads/thread/members/3.cc: Likewise.
2665         * testsuite/30_threads/thread/members/4.cc: Likewise.
2666         * testsuite/30_threads/thread/members/5.cc: Likewise.
2667         * testsuite/30_threads/thread/members/hardware_concurrency.cc:
2668         Likewise.
2669         * testsuite/30_threads/thread/native_handle/typesizes.cc: Likewise.
2670         * testsuite/30_threads/thread/swap/1.cc: Likewise.
2671         * testsuite/30_threads/timed_mutex/cons/1.cc: Likewise.
2672         * testsuite/30_threads/timed_mutex/dest/destructor_locked.cc:
2673         Likewise.
2674         * testsuite/30_threads/timed_mutex/lock/1.cc: Likewise.
2675         * testsuite/30_threads/timed_mutex/native_handle/1.cc: Likewise.
2676         * testsuite/30_threads/timed_mutex/native_handle/typesizes.cc:
2677         Likewise.
2678         * testsuite/30_threads/timed_mutex/try_lock/1.cc: Likewise.
2679         * testsuite/30_threads/timed_mutex/try_lock/2.cc: Likewise.
2680         * testsuite/30_threads/timed_mutex/try_lock_for/1.cc: Likewise.
2681         * testsuite/30_threads/timed_mutex/try_lock_for/2.cc: Likewise.
2682         * testsuite/30_threads/timed_mutex/try_lock_for/3.cc: Likewise.
2683         * testsuite/30_threads/timed_mutex/try_lock_until/1.cc: Likewise.
2684         * testsuite/30_threads/timed_mutex/try_lock_until/2.cc: Likewise.
2685         * testsuite/30_threads/timed_mutex/try_lock_until/57641.cc: Likewise.
2686         * testsuite/30_threads/timed_mutex/unlock/1.cc: Likewise.
2687         * testsuite/30_threads/timed_mutex/unlock/2.cc: Likewise.
2688         * testsuite/30_threads/try_lock/1.cc: Likewise.
2689         * testsuite/30_threads/try_lock/2.cc: Likewise.
2690         * testsuite/30_threads/try_lock/3.cc: Likewise.
2691         * testsuite/30_threads/try_lock/4.cc: Likewise.
2692         * testsuite/30_threads/unique_lock/cons/1.cc: Likewise.
2693         * testsuite/30_threads/unique_lock/cons/2.cc: Likewise.
2694         * testsuite/30_threads/unique_lock/cons/3.cc: Likewise.
2695         * testsuite/30_threads/unique_lock/cons/4.cc: Likewise.
2696         * testsuite/30_threads/unique_lock/cons/5.cc: Likewise.
2697         * testsuite/30_threads/unique_lock/cons/6.cc: Likewise.
2698         * testsuite/30_threads/unique_lock/locking/1.cc: Likewise.
2699         * testsuite/30_threads/unique_lock/locking/2.cc: Likewise.
2700         * testsuite/30_threads/unique_lock/locking/3.cc: Likewise.
2701         * testsuite/30_threads/unique_lock/locking/4.cc: Likewise.
2702         * testsuite/30_threads/unique_lock/modifiers/1.cc: Likewise.
2703
2704 2020-08-21  Jonathan Wakely  <jwakely@redhat.com>
2705
2706         PR libstdc++/96736
2707         * testsuite/17_intro/headers/c++1998/all_attributes.cc: Do not
2708         test "cold" on darwin.
2709         * testsuite/17_intro/headers/c++2011/all_attributes.cc:
2710         Likewise.
2711         * testsuite/17_intro/headers/c++2014/all_attributes.cc:
2712         Likewise.
2713         * testsuite/17_intro/headers/c++2017/all_attributes.cc:
2714         Likewise.
2715         * testsuite/17_intro/headers/c++2020/all_attributes.cc:
2716         Likewise.
2717
2718 2020-08-21  Jonathan Wakely  <jwakely@redhat.com>
2719
2720         PR libstdc++/96718
2721         * testsuite/25_algorithms/pstl/feature_test-2.cc: Require
2722         tbb-backend effective target.
2723         * testsuite/25_algorithms/pstl/feature_test-3.cc: Likewise.
2724         * testsuite/25_algorithms/pstl/feature_test-5.cc: Likewise.
2725         * testsuite/25_algorithms/pstl/feature_test.cc: Likewise.
2726
2727 2020-08-20  Jonathan Wakely  <jwakely@redhat.com>
2728
2729         * include/bits/iterator_concepts.h [__STRICT_ANSI__]
2730         (incrementable_traits<__int128>): Define specialization.
2731         (incrementable_traits<unsigned __int128>): Likewise.
2732         * testsuite/std/ranges/iota/96042.cc: Test iota_view with
2733         __int128.
2734
2735 2020-08-19  Jonathan Wakely  <jwakely@redhat.com>
2736             Patrick Palka  <ppalka@redhat.com>
2737
2738         PR libstdc++/96042
2739         * include/bits/range_access.h (__detail::__to_unsigned_like):
2740         Do not use make_unsigned_t<T> in the return type, as it can
2741         result in an error before the integral<T> constraint is checked.
2742         [__STRICT_ANSI__]: Add overloads for 128-bit integer types.
2743         (__detail::__make_unsigned_like_t): Define as the return type
2744         of __to_unsigned_like.
2745         * testsuite/std/ranges/subrange/96042.cc: New test.
2746
2747 2020-08-19  Jonathan Wakely  <jwakely@redhat.com>
2748
2749         * include/bits/stl_tree.h (operator!=, operator>, operator<=)
2750         (operator>=): Remove deprecated functions.
2751
2752 2020-08-19  Jonathan Wakely  <jwakely@redhat.com>
2753
2754         PR libstdc++/96042
2755         * include/ext/numeric_traits.h (__is_integer_nonstrict): New
2756         trait which is true for 128-bit integers even in strict modes.
2757         (__numeric_traits_integer, __numeric_traits): Use
2758         __is_integer_nonstrict instead of __is_integer.
2759         * include/std/limits [__STRICT_ANSI__ && __SIZEOF_INT128__]
2760         (numeric_limits<__int128>, (numeric_limits<unsigned __int128>):
2761         Define.
2762         * testsuite/std/ranges/iota/96042.cc: New test.
2763
2764 2020-08-19  Jonathan Wakely  <jwakely@redhat.com>
2765
2766         * include/bits/c++config (_GLIBCXX_DEPRECATED_SUGGEST)
2767         (_GLIBCXX11_DEPRECATED, _GLIBCXX11_DEPRECATED_SUGGEST)
2768         (_GLIBCXX17_DEPRECATED_SUGGEST, _GLIBCXX20_DEPRECATED_SUGGEST):
2769         Add new macros to comment.
2770
2771 2020-08-19  Patrick Palka  <ppalka@redhat.com>
2772
2773         * include/Makefile.am (bits_headers): Add new header
2774         <bits/max_size_type.h>.
2775         * include/Makefile.in: Regenerate.
2776         * include/bits/iterator_concepts.h
2777         (ranges::__detail::__max_diff_type): Remove definition, replace
2778         with forward declaration of class __max_diff_type.
2779         (__detail::__max_size_type): Remove definition, replace with
2780         forward declaration of class __max_size_type.
2781         (__detail::__is_unsigned_int128, __is_signed_int128)
2782         (__is_int128): New concepts.
2783         (__detail::__is_integer_like): Accept __int128 and unsigned
2784         __int128.
2785         (__detail::__is_signed_integer_like): Accept __int128.
2786         * include/bits/max_size_type.h: New header.
2787         * include/bits/range_access.h: Include <bits/max_size_type.h>.
2788         (__detail::__to_unsigned_like): Two new overloads.
2789         * testsuite/std/ranges/iota/difference_type.cc: New test.
2790         * testsuite/std/ranges/iota/max_size_type.cc: New test.
2791
2792 2020-08-19  Jonathan Wakely  <jwakely@redhat.com>
2793
2794         * include/bits/c++config (_GLIBCXX_DEPRECATED): Define for all
2795         standard modes.
2796         (_GLIBCXX_DEPRECATED_SUGGEST): New macro for "use 'foo' instead"
2797         message in deprecated warnings.
2798         (_GLIBCXX11_DEPRECATED, _GLIBCXX11_DEPRECATED_SUGGEST): New
2799         macros for marking features deprecated in C++11.
2800         (_GLIBCXX17_DEPRECATED_SUGGEST, _GLIBCXX20_DEPRECATED_SUGGEST):
2801         New macros.
2802         * include/backward/auto_ptr.h (auto_ptr_ref, auto_ptr<void>):
2803         Use _GLIBCXX11_DEPRECATED instead of _GLIBCXX_DEPRECATED.
2804         (auto_ptr): Use _GLIBCXX11_DEPRECATED_SUGGEST.
2805         * include/backward/binders.h (binder1st, binder2nd): Likewise.
2806         * include/bits/ios_base.h (io_state, open_mode, seek_dir)
2807         (streampos, streamoff): Use _GLIBCXX_DEPRECATED_SUGGEST.
2808         * include/std/streambuf (stossc): Replace C++11 attribute
2809         with _GLIBCXX_DEPRECATED_SUGGEST.
2810         * include/std/type_traits (__is_nullptr_t): Use
2811         _GLIBCXX_DEPRECATED_SUGGEST instead of _GLIBCXX_DEPRECATED.
2812         * testsuite/27_io/types/1.cc: Check for deprecated warnings.
2813         Also check for io_state, open_mode and seek_dir typedefs.
2814
2815 2020-08-19  Antony Polukhin  <antoshkka@gmail.com>
2816
2817         PR libstdc++/71579
2818         * include/std/type_traits (invoke_result, is_nothrow_invocable_r)
2819         Add static_asserts to make sure that the argument of the type
2820         trait is not misused with incomplete types.
2821         (is_swappable_with, is_nothrow_swappable_with): Add static_asserts
2822         to make sure that the first and second arguments of the type trait
2823         are not misused with incomplete types.
2824         * testsuite/20_util/invoke_result/incomplete_neg.cc: New test.
2825         * testsuite/20_util/is_nothrow_invocable/incomplete_neg.cc: New test.
2826         * testsuite/20_util/is_nothrow_swappable/incomplete_neg.cc: New test.
2827         * testsuite/20_util/is_nothrow_swappable_with/incomplete_neg.cc: New
2828         test.
2829         * testsuite/20_util/is_swappable_with/incomplete_neg.cc: New test.
2830
2831 2020-08-18  David Edelsohn  <dje.gcc@gmail.com>
2832             Clement Chigot  <clement.chigot@atos.net>
2833
2834         * config/os/aix/t-aix: Add complementary mode object files to
2835         libsupc++.a
2836
2837 2020-08-18  Jonathan Wakely  <jwakely@redhat.com>
2838
2839         * testsuite/17_intro/headers/c++1998/all_attributes.cc: Check
2840         "cold" isn't used in the library. Also check <cxxabi.h>.
2841         * testsuite/17_intro/headers/c++2011/all_attributes.cc:
2842         Likewise.
2843         * testsuite/17_intro/headers/c++2014/all_attributes.cc:
2844         Likewise.
2845         * testsuite/17_intro/headers/c++2017/all_attributes.cc:
2846         Likewise.
2847         * testsuite/17_intro/headers/c++2020/all_attributes.cc:
2848         Likewise.
2849
2850 2020-08-18  Jonathan Wakely  <jwakely@redhat.com>
2851
2852         PR libstdc++/69724
2853         * include/std/future (__future_base::_S_make_deferred_state)
2854         (__future_base::_S_make_async_state): Remove.
2855         (__future_base::_Deferred_state): Change constructor to accept a
2856         parameter pack of arguments and forward them to the call
2857         wrapper.
2858         (__future_base::_Async_state_impl): Likewise. Replace lambda
2859         expression with a named member function.
2860         (async): Construct state object directly from the arguments,
2861         instead of using thread::__make_invoker, _S_make_deferred_state
2862         and _S_make_async_state. Move shared state into the returned
2863         future.
2864         * include/std/thread (thread::_Call_wrapper): New alias
2865         template for use by constructor and std::async.
2866         (thread::thread(Callable&&, Args&&...)): Create state object
2867         directly instead of using _S_make_state.
2868         (thread::__make_invoker, thread::__decayed_tuple)
2869         (thread::_S_make_state): Remove.
2870         * testsuite/30_threads/async/69724.cc: New test.
2871
2872 2020-08-17  Jonathan Wakely  <jwakely@redhat.com>
2873
2874         PR libstdc++/55713
2875         PR libstdc++/71096
2876         PR libstdc++/93147
2877         * include/std/tuple [__has_cpp_attribute(no_unique_address)]
2878         (_Head_base<Idx, Head, true>): New definition of the partial
2879         specialization, using [[no_unique_address]] instead of
2880         inheritance.
2881         * testsuite/libstdc++-prettyprinters/48362.cc: Adjust expected
2882         output.
2883         * testsuite/20_util/tuple/comparison_operators/93147.cc: New test.
2884         * testsuite/20_util/tuple/creation_functions/55713.cc: New test.
2885         * testsuite/20_util/tuple/element_access/71096.cc: New test.
2886
2887 2020-08-14  Lewis Hyatt  <lhyatt@gmail.com>
2888
2889         * testsuite/lib/libstdc++.exp: Use the new option
2890         -fdiagnostics-plain-output.
2891
2892 2020-08-13  Jonathan Wakely  <jwakely@redhat.com>
2893
2894         * acinclude.m4 (GLIBCXX_ENABLE_CHEADERS): Warn if the c_std
2895         option is used and fail unless --enable-cheaders-obsolete is
2896         also used.
2897         * configure: Regenerate.
2898
2899 2020-08-12  Jonathan Wakely  <jwakely@redhat.com>
2900
2901         PR libstdc++/85828
2902         * include/bits/basic_string.h (operator=(basic_string&&)): Check
2903         for self-move before copying with char_traits::copy.
2904         * include/bits/hashtable.h (operator=(_Hashtable&&)): Check for
2905         self-move.
2906         * include/bits/stl_deque.h (_M_move_assign1(deque&&, false_type)):
2907         Check for equal allocators.
2908         * include/bits/stl_list.h (_M_move_assign(list&&, true_type)):
2909         Call clear() instead of _M_clear().
2910         * include/debug/formatter.h (__msg_self_move_assign): Change
2911         comment.
2912         * include/debug/macros.h (__glibcxx_check_self_move_assign):
2913         (_GLIBCXX_DEBUG_VERIFY): Remove.
2914         * include/debug/safe_container.h (operator=(_Safe_container&&)):
2915         Remove assertion check for safe move and make it well-defined.
2916         * include/debug/safe_iterator.h (operator=(_Safe_iterator&&)):
2917         Remove assertion check for self-move.
2918         * include/debug/safe_local_iterator.h
2919         (operator=(_Safe_local_iterator&&)): Likewise.
2920         * testsuite/21_strings/basic_string/cons/char/self_move.cc: New test.
2921         * testsuite/23_containers/deque/cons/self_move.cc: New test.
2922         * testsuite/23_containers/forward_list/cons/self_move.cc: New test.
2923         * testsuite/23_containers/list/cons/self_move.cc: New test.
2924         * testsuite/23_containers/set/cons/self_move.cc: New test.
2925         * testsuite/23_containers/unordered_set/cons/self_move.cc: New test.
2926         * testsuite/23_containers/vector/cons/self_move.cc: New test.
2927
2928 2020-08-11  François Dumont  <fdumont@gcc.gnu.org>
2929
2930         PR libstdc++/91620
2931         * include/bits/forward_list.tcc (forward_list<>::remove): Collect nodes
2932         to destroy in an intermediate forward_list.
2933         (forward_list<>::remove_if, forward_list<>::unique): Likewise.
2934         * include/bits/list.tcc (list<>::remove, list<>::unique): Likewise.
2935         (list<>::remove_if): Likewise.
2936         * include/debug/forward_list (forward_list<>::_M_erase_after): Remove.
2937         (forward_list<>::erase_after): Adapt.
2938         (forward_list<>::remove, forward_list<>::remove_if): Collect nodes to
2939         destroy in an intermediate forward_list.
2940         (forward_list<>::unique): Likewise.
2941         * include/debug/list (list<>::remove, list<>::unique): Likewise.
2942         (list<>::remove_if): Likewise.
2943         * testsuite/23_containers/forward_list/operations/91620.cc: New test.
2944         * testsuite/23_containers/list/operations/91620.cc: New test.
2945
2946 2020-08-11  Jonathan Wakely  <jwakely@redhat.com>
2947
2948         * testsuite/30_threads/thread/cons/84535.cc: Use a custom
2949         namespace.
2950         * testsuite/30_threads/thread/cons/lwg2097.cc: Likewise.
2951
2952 2020-08-11  Jonathan Wakely  <jwakely@redhat.com>
2953
2954         PR libstdc++/89760
2955         * include/experimental/executor [!_GLIBCXX_HAS_GTHREADS]:
2956         (execution_context::mutex_type): Define dummy mutex type.
2957         (system_context): Use execution_context::mutex_type.
2958         (system_context) [!_GLIBCXX_HAS_GTHREADS]: Define dummy
2959         thread and condition variable types.
2960         [!_GLIBCXX_HAS_GTHREADS] (system_context::_M_run()): Do not
2961         define.
2962         (system_context::_M_post) [!_GLIBCXX_HAS_GTHREADS]: Throw
2963         an exception when threads aren't available.
2964         (strand::running_in_this_thread()): Defer to _M_state.
2965         (strand::_State::running_in_this_thread()): New function.
2966         (use_future_t): Do not depend on _GLIBCXX_USE_C99_STDINT_TR1.
2967         * include/experimental/io_context (io_context): Use the
2968         execution_context::mutex_type alias. Replace stack of thread
2969         IDs with counter.
2970         * testsuite/experimental/net/execution_context/use_service.cc:
2971         Enable test for non-pthread targets.
2972
2973 2020-08-11  Jonathan Wakely  <jwakely@redhat.com>
2974
2975         * include/experimental/executor (system_context::a__tag): Make
2976         default constructor explicit.
2977
2978 2020-08-11  Jonathan Wakely  <jwakely@redhat.com>
2979
2980         * include/experimental/executor (system_context::_M_run()):
2981         Fix predicate.
2982         * testsuite/experimental/net/system_context/1.cc: New test.
2983
2984 2020-08-11  Jonathan Wakely  <jwakely@redhat.com>
2985
2986         * include/std/stop_token: Check _GLIBCXX_HAS_GTHREADS using
2987         #ifdef instead of #if.
2988         (stop_token::_S_yield()): Check _GLIBCXX_HAS_GTHREADS before
2989         using __gthread_yield.
2990
2991 2020-08-11  Jonathan Wakely  <jwakely@redhat.com>
2992
2993         * include/std/thread [!_GLIBCXX_HAS_GTHREADS] (this_thread::yield)
2994         (this_thread::sleep_until): Define.
2995         [!_GLIBCXX_HAS_GTHREADS] (this_thread::sleep_for): Define. Replace
2996         use of __gthread_time_t typedef with timespec.
2997         * src/c++11/thread.cc [!_GLIBCXX_HAS_GTHREADS] (__sleep_for):
2998         Likewise.
2999         * testsuite/30_threads/this_thread/2.cc: Moved to...
3000         * testsuite/30_threads/this_thread/yield.cc: ...here.
3001         * testsuite/30_threads/this_thread/3.cc: Moved to...
3002         * testsuite/30_threads/this_thread/sleep_for-mt.cc: ...here.
3003         * testsuite/30_threads/this_thread/4.cc: Moved to...
3004         * testsuite/30_threads/this_thread/sleep_until-mt.cc: ...here.
3005         * testsuite/30_threads/this_thread/58038.cc: Add
3006         dg-require-sleep.
3007         * testsuite/30_threads/this_thread/60421.cc: Likewise.
3008         * testsuite/30_threads/this_thread/sleep_for.cc: New test.
3009         * testsuite/30_threads/this_thread/sleep_until.cc: New test.
3010
3011 2020-08-10  Jonathan Wakely  <jwakely@redhat.com>
3012
3013         PR libstdc++/94681
3014         * src/c++17/fs_ops.cc (read_symlink): Use posix::lstat instead
3015         of calling ::lstat directly.
3016         * src/filesystem/ops.cc (read_symlink): Likewise.
3017
3018 2020-08-10  Jonathan Wakely  <jwakely@redhat.com>
3019
3020         * python/libstdcxx/v6/printers.py (UniquePointerPrinter.__init__):
3021         Use gdb.Type.strip_typedefs().
3022         * testsuite/libstdc++-prettyprinters/compat.cc: Use a typedef in
3023         the emulated old type.
3024
3025 2020-08-10  Jonathan Wakely  <jwakely@redhat.com>
3026
3027         PR libstdc++/94681
3028         * acinclude.m4 (GLIBCXX_CHECK_FILESYSTEM_DEPS): Do not depend on
3029         $enable_libstdcxx_filesystem_ts.
3030         * configure: Regenerate.
3031
3032 2020-08-10  Jonathan Wakely  <jwakely@redhat.com>
3033
3034         PR libstdc++/93904
3035         * include/bits/stl_iterator.h (inserter): Do not deduce
3036         iterator type (LWG 561).
3037         * testsuite/24_iterators/insert_iterator/dr561.cc: New test.
3038
3039 2020-08-10  Jonathan Wakely  <jwakely@redhat.com>
3040
3041         * include/bits/basic_string.tcc [_GLIBCXX_USE_CXX11_ABI=0]
3042         (basic_string::reserve()): Do nothing if exceptions are not
3043         enabled.
3044
3045 2020-08-10  Jonathan Wakely  <jwakely@redhat.com>
3046
3047         PR libstdc++/95749
3048         * src/filesystem/ops-common.h [_GLIBCXX_FILESYSTEM_IS_WINDOWS]
3049         (stat_type): Change to __stat64.
3050         (stat): Use _wstat64.
3051
3052 2020-08-07  Jonathan Wakely  <jwakely@redhat.com>
3053
3054         PR libstdc++/96303
3055         * include/debug/bitset (bitset::operator==): Call _M_base() on
3056         right operand.
3057         (bitset::operator!=): Likewise, but don't define it at all when
3058         default comparisons are supported by the compiler.
3059         * testsuite/23_containers/bitset/operations/96303.cc: New test.
3060
3061 2020-08-07  Jonathan Wakely  <jwakely@redhat.com>
3062
3063         * testsuite/18_support/comparisons/algorithms/partial_order.cc:
3064         Replace VERIFY with static_assert where the compiler now
3065         allows it.
3066         * testsuite/18_support/comparisons/algorithms/weak_order.cc:
3067         Likewise.
3068
3069 2020-08-07  Jonathan Wakely  <jwakely@redhat.com>
3070
3071         * config/abi/pre/gnu.ver: Fix wildcards for wstring symbols.
3072
3073 2020-08-06  Andrew Luo  <andrewluotechnologies@outlook.com>
3074             Jonathan Wakely  <jwakely@redhat.com>
3075
3076         * config/abi/pre/gnu.ver (GLIBCXX_3.4): Use less greedy
3077         patterns for basic_string members.
3078         (GLIBCXX_3.4.29): Export new basic_string::reserve symbols.
3079         * doc/xml/manual/status_cxx2020.xml: Update P0966 status.
3080         * include/bits/basic_string.h (shrink_to_fit()): Call reserve().
3081         (reserve(size_type)): Remove default argument.
3082         (reserve()): Declare new overload.
3083         [!_GLIBCXX_USE_CXX11_ABI] (shrink_to_fit, reserve): Likewise.
3084         * include/bits/basic_string.tcc (reserve(size_type)): Remove
3085         support for shrinking capacity.
3086         (reserve()): Perform shrink-to-fit operation.
3087         [!_GLIBCXX_USE_CXX11_ABI] (reserve): Likewise.
3088         * testsuite/21_strings/basic_string/capacity/1.cc: Adjust to
3089         reflect new behavior.
3090         * testsuite/21_strings/basic_string/capacity/char/1.cc:
3091         Likewise.
3092         * testsuite/21_strings/basic_string/capacity/char/18654.cc:
3093         Likewise.
3094         * testsuite/21_strings/basic_string/capacity/char/2.cc:
3095         Likewise.
3096         * testsuite/21_strings/basic_string/capacity/wchar_t/1.cc:
3097         Likewise.
3098         * testsuite/21_strings/basic_string/capacity/wchar_t/18654.cc:
3099         Likewise.
3100         * testsuite/21_strings/basic_string/capacity/wchar_t/2.cc:
3101         Likewise.
3102
3103 2020-08-06  Jonathan Wakely  <jwakely@redhat.com>
3104
3105         * include/bits/basic_string.tcc
3106         (operator>>(basic_istream&, basic_string&)): Do not set eofbit
3107         if extraction stopped after in.width() characters.
3108         * src/c++98/istream-string.cc (operator>>(istream&, string&)):
3109         Likewise.
3110         * include/bits/istream.tcc (__istream_extract): Do not set
3111         eofbit if extraction stopped after n-1 characters.
3112         * src/c++98/istream.cc (__istream_extract): Likewise.
3113         * testsuite/21_strings/basic_string/inserters_extractors/char/13.cc: New test.
3114         * testsuite/21_strings/basic_string/inserters_extractors/wchar_t/13.cc: New test.
3115         * testsuite/27_io/basic_istream/extractors_character/char/5.cc: New test.
3116         * testsuite/27_io/basic_istream/extractors_character/wchar_t/5.cc: New test.
3117
3118 2020-08-06  Jonathan Wakely  <jwakely@redhat.com>
3119
3120         PR libstdc++/96484
3121         * src/c++17/fs_ops.cc (fs::read_symlink): Return an error
3122         immediately for non-symlinks.
3123         * src/filesystem/ops.cc (fs::read_symlink): Likewise.
3124
3125 2020-08-06  Jonathan Wakely  <jwakely@redhat.com>
3126
3127         * include/std/istream (operator>>(istream&, char*)): Add
3128         attributes to get warnings for pointers that are null or known
3129         to point to the end of a buffer. Request upper bound from
3130         __builtin_object_size check and handle zero-sized buffer case.
3131         (operator>>(istream&, signed char))
3132         (operator>>(istream&, unsigned char*)): Add attributes.
3133         * testsuite/27_io/basic_istream/extractors_character/char/overflow.cc:
3134         Check extracting into the middle of a buffer.
3135         * testsuite/27_io/basic_istream/extractors_character/wchar_t/overflow.cc: New test.
3136
3137 2020-08-05  Jonathan Wakely  <jwakely@redhat.com>
3138
3139         * include/std/atomic (atomic<T>::store): Reformat.
3140
3141 2020-08-05  Jonathan Wakely  <jwakely@redhat.com>
3142
3143         * doc/xml/manual/status_cxx2017.xml: Replace oneAPI DPC++ link
3144         with LLVM repo for PSTL.
3145         * doc/html/manual/status.html: Regenerate.
3146
3147 2020-08-05  Jonathan Wakely  <jwakely@redhat.com>
3148
3149         * config/abi/pre/gnu.ver (GLIBCXX_3.4.29): Export new symbols.
3150         * include/bits/istream.tcc (__istream_extract): New function
3151         template implementing both of operator>>(istream&, char*) and
3152         operator>>(istream&, char(&)[N]). Add explicit instantiation
3153         declaration for it. Remove explicit instantiation declarations
3154         for old function templates.
3155         * include/std/istream (__istream_extract): Declare.
3156         (operator>>(basic_istream<C,T>&, C*)): Define inline and simply
3157         call __istream_extract.
3158         (operator>>(basic_istream<char,T>&, signed char*)): Likewise.
3159         (operator>>(basic_istream<char,T>&, unsigned char*)): Likewise.
3160         (operator>>(basic_istream<C,T>&, C(7)[N])): Define for LWG 2499.
3161         (operator>>(basic_istream<char,T>&, signed char(&)[N])):
3162         Likewise.
3163         (operator>>(basic_istream<char,T>&, unsigned char(&)[N])):
3164         Likewise.
3165         * include/std/streambuf (basic_streambuf): Declare char overload
3166         of __istream_extract as a friend.
3167         * src/c++11/istream-inst.cc: Add explicit instantiation
3168         definition for wchar_t overload of __istream_extract. Remove
3169         explicit instantiation definitions of old operator>> overloads
3170         for versioned-namespace build.
3171         * src/c++98/istream.cc (operator>>(istream&, char*)): Replace
3172         with __istream_extract(istream&, char*, streamsize).
3173         * testsuite/27_io/basic_istream/extractors_character/char/3.cc:
3174         Do not use variable-length array.
3175         * testsuite/27_io/basic_istream/extractors_character/char/4.cc:
3176         Do not run test for C++20.
3177         * testsuite/27_io/basic_istream/extractors_character/char/9555-ic.cc:
3178         Do not test writing to pointers for C++20.
3179         * testsuite/27_io/basic_istream/extractors_character/char/9826.cc:
3180         Use array instead of pointer.
3181         * testsuite/27_io/basic_istream/extractors_character/wchar_t/3.cc:
3182         Do not use variable-length array.
3183         * testsuite/27_io/basic_istream/extractors_character/wchar_t/4.cc:
3184         Do not run test for C++20.
3185         * testsuite/27_io/basic_istream/extractors_character/wchar_t/9555-ic.cc:
3186         Do not test writing to pointers for C++20.
3187         * testsuite/27_io/basic_istream/extractors_character/char/lwg2499.cc:
3188         New test.
3189         * testsuite/27_io/basic_istream/extractors_character/char/lwg2499_neg.cc:
3190         New test.
3191         * testsuite/27_io/basic_istream/extractors_character/char/overflow.cc:
3192         New test.
3193         * testsuite/27_io/basic_istream/extractors_character/wchar_t/lwg2499.cc:
3194         New test.
3195         * testsuite/27_io/basic_istream/extractors_character/wchar_t/lwg2499_neg.cc:
3196         New test.
3197
3198 2020-08-01  Gerald Pfeifer  <gerald@pfeifer.com>
3199
3200         * doc/xml/manual/using_exceptions.xml: Move www.stroustrup.com to
3201         https.
3202         * doc/html/manual/using_exceptions.html: Regenerate.
3203
3204 2020-07-31  Gerald Pfeifer  <gerald@pfeifer.com>
3205
3206         * doc/xml/manual/status_cxx2017.xml: ParallelSTL is now part
3207         of oneAPI DPC++ Library on Github.
3208         * doc/html/manual/status.html: Regenerate.
3209
3210 2020-07-31  François Dumont  <fdumont@gcc.gnu.org>
3211
3212         * include/bits/stl_bvector.h
3213         [_GLIBCXX_INLINE_VERSION](_Bvector_impl_data::_M_start): Define as
3214         _Bit_type*.
3215         (_Bvector_impl_data(const _Bvector_impl_data&)): Default.
3216         (_Bvector_impl_data(_Bvector_impl_data&&)): Delegate to latter.
3217         (_Bvector_impl_data::operator=(const _Bvector_impl_data&)): Default.
3218         (_Bvector_impl_data::_M_move_data(_Bvector_impl_data&&)): Use latter.
3219         (_Bvector_impl_data::_M_reset()): Likewise.
3220         (_Bvector_impl_data::_M_swap_data): New.
3221         (_Bvector_impl::_Bvector_impl(_Bvector_impl&&)): Implement explicitely.
3222         (_Bvector_impl::_Bvector_impl(_Bit_alloc_type&&, _Bvector_impl&&)): New.
3223         (_Bvector_base::_Bvector_base(_Bvector_base&&, const allocator_type&)):
3224         New, use latter.
3225         (vector::vector(vector&&, const allocator_type&, true_type)): New, use
3226         latter.
3227         (vector::vector(vector&&, const allocator_type&, false_type)): New.
3228         (vector::vector(vector&&, const allocator_type&)): Use latters.
3229         (vector::vector(const vector&, const allocator_type&)): Adapt.
3230         [__cplusplus >= 201103](vector::vector(_InputIt, _InputIt,
3231         const allocator_type&)): Use _M_initialize_range.
3232         (vector::operator[](size_type)): Use iterator operator[].
3233         (vector::operator[](size_type) const): Use const_iterator operator[].
3234         (vector::swap(vector&)): Add assertions on allocators. Use _M_swap_data.
3235         [__cplusplus >= 201103](vector::insert(const_iterator, _InputIt,
3236         _InputIt)): Use _M_insert_range.
3237         (vector::_M_initialize(size_type)): Adapt.
3238         [__cplusplus >= 201103](vector::_M_initialize_dispatch): Remove.
3239         [__cplusplus >= 201103](vector::_M_insert_dispatch): Remove.
3240         * python/libstdcxx/v6/printers.py (StdVectorPrinter._iterator): Stop
3241         using start _M_offset.
3242         (StdVectorPrinter.to_string): Likewise.
3243         * testsuite/23_containers/vector/bool/allocator/swap.cc: Adapt.
3244         * testsuite/23_containers/vector/bool/cons/noexcept_move_construct.cc:
3245         Add check.
3246
3247 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
3248
3249         * testsuite/27_io/basic_istream/ignore/char/94749.cc: Use 0
3250         instead of nullptr.
3251         * testsuite/27_io/basic_istream/ignore/wchar_t/94749.cc:
3252         Likewise.
3253
3254 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
3255
3256         * testsuite/20_util/specialized_algorithms/uninitialized_fill_n/sizes.cc:
3257         Move struct to namespace scope.
3258
3259 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
3260
3261         * testsuite/26_numerics/numbers/float128.cc: Check
3262         __STRICT_ANSI__ before using __float128.
3263         * testsuite/std/concepts/concepts.lang/concept.arithmetic/floating_point.cc:
3264         Likewise.
3265
3266 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
3267
3268         * testsuite/18_support/set_terminate.cc: Require C++11 or
3269         higher.
3270         * testsuite/28_regex/simple_c++11.cc: Likewise.
3271         * testsuite/tr1/headers/c++200x/complex.cc: Likewise.
3272         * testsuite/24_iterators/headers/iterator/synopsis.cc:
3273         Require C++14 or lower.
3274
3275 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
3276
3277         * testsuite/23_containers/span/back_assert_neg.cc: Split c++2a
3278         effective-target from xfail selector.
3279         * testsuite/23_containers/span/first_2_assert_neg.cc: Likewise.
3280         * testsuite/23_containers/span/first_assert_neg.cc: Likewise.
3281         * testsuite/23_containers/span/front_assert_neg.cc: Likewise.
3282         * testsuite/23_containers/span/index_op_assert_neg.cc: Likewise.
3283         * testsuite/23_containers/span/last_2_assert_neg.cc: Likewise.
3284         * testsuite/23_containers/span/last_assert_neg.cc: Likewise.
3285         * testsuite/23_containers/span/subspan_2_assert_neg.cc:
3286         Likewise.
3287         * testsuite/23_containers/span/subspan_3_assert_neg.cc:
3288         Likewise.
3289         * testsuite/23_containers/span/subspan_4_assert_neg.cc:
3290         Likewise.
3291         * testsuite/23_containers/span/subspan_5_assert_neg.cc:
3292         Likewise.
3293         * testsuite/23_containers/span/subspan_6_assert_neg.cc:
3294         Likewise.
3295         * testsuite/23_containers/span/subspan_assert_neg.cc: Likewise.
3296
3297 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
3298
3299         * testsuite/20_util/reference_wrapper/83427.cc: Adjust
3300         effective-target to specific language mode only.
3301         * testsuite/24_iterators/headers/iterator/range_access_c++11.cc:
3302         Likewise.
3303         * testsuite/24_iterators/headers/iterator/range_access_c++14.cc:
3304         Likewise.
3305         * testsuite/24_iterators/headers/iterator/synopsis_c++11.cc:
3306         Likewise.
3307         * testsuite/24_iterators/headers/iterator/synopsis_c++14.cc:
3308         Likewise.
3309         * testsuite/26_numerics/valarray/69116.cc:
3310         Likewise.
3311         * testsuite/30_threads/headers/condition_variable/std_c++0x_neg.cc:
3312         Remove whitespace at end of file.
3313         * testsuite/30_threads/headers/future/std_c++0x_neg.cc:
3314         Likewise.
3315
3316 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
3317
3318         * testsuite/17_intro/headers/c++2017/all_attributes.cc: Add
3319         c++17 effective-target.
3320         * testsuite/17_intro/headers/c++2017/all_no_exceptions.cc:
3321         Likewise.
3322         * testsuite/17_intro/headers/c++2017/all_no_rtti.cc: Likewise.
3323         * testsuite/17_intro/headers/c++2017/all_pedantic_errors.cc:
3324         Likewise.
3325         * testsuite/17_intro/headers/c++2017/operator_names.cc:
3326         Likewise.
3327         * testsuite/17_intro/headers/c++2017/stdc++.cc: Likewise.
3328         * testsuite/17_intro/headers/c++2017/stdc++_multiple_inclusion.cc:
3329         Likewise.
3330         * testsuite/18_support/uncaught_exceptions/uncaught_exceptions.cc:
3331         Likewise.
3332         * testsuite/19_diagnostics/error_code/is_error_code_v.cc:
3333         Likewise.
3334         * testsuite/20_util/any/assign/1.cc: Likewise.
3335         * testsuite/20_util/any/assign/2.cc: Likewise.
3336         * testsuite/20_util/any/assign/emplace.cc: Likewise.
3337         * testsuite/20_util/any/assign/exception.cc: Likewise.
3338         * testsuite/20_util/any/assign/self.cc: Likewise.
3339         * testsuite/20_util/any/cons/1.cc: Likewise.
3340         * testsuite/20_util/any/cons/2.cc: Likewise.
3341         * testsuite/20_util/any/cons/aligned.cc: Likewise.
3342         * testsuite/20_util/any/cons/explicit.cc: Likewise.
3343         * testsuite/20_util/any/cons/in_place.cc: Likewise.
3344         * testsuite/20_util/any/cons/nontrivial.cc: Likewise.
3345         * testsuite/20_util/any/make_any.cc: Likewise.
3346         * testsuite/20_util/any/misc/any_cast.cc: Likewise.
3347         * testsuite/20_util/any/misc/any_cast_no_rtti.cc: Likewise.
3348         * testsuite/20_util/any/misc/swap.cc: Likewise.
3349         * testsuite/20_util/any/modifiers/1.cc: Likewise.
3350         * testsuite/20_util/any/observers/type.cc: Likewise.
3351         * testsuite/20_util/any/requirements.cc: Likewise.
3352         * testsuite/20_util/any/typedefs.cc: Likewise.
3353         * testsuite/20_util/as_const/1.cc: Likewise.
3354         * testsuite/20_util/as_const/rvalue_neg.cc: Likewise.
3355         * testsuite/20_util/bind/is_placeholder_v.cc: Likewise.
3356         * testsuite/20_util/bool_constant/requirements.cc: Likewise.
3357         * testsuite/20_util/duration/requirements/treat_as_floating_point_v.cc:
3358         Likewise.
3359         * testsuite/20_util/duration_cast/rounding.cc: Likewise.
3360         * testsuite/20_util/enable_shared_from_this/members/weak_from_this.cc:
3361         Likewise.
3362         * testsuite/20_util/function_objects/invoke/59768.cc: Likewise.
3363         * testsuite/20_util/function_objects/not_fn/1.cc: Likewise.
3364         * testsuite/20_util/function_objects/searchers.cc: Likewise.
3365         * testsuite/20_util/in_place/requirements.cc: Likewise.
3366         * testsuite/20_util/is_invocable/requirements/explicit_instantiation.cc:
3367         Likewise.
3368         * testsuite/20_util/is_invocable/requirements/typedefs.cc:
3369         Likewise.
3370         * testsuite/20_util/is_invocable/value.cc: Likewise.
3371         * testsuite/20_util/is_nothrow_invocable/requirements/explicit_instantiation.cc:
3372         Likewise.
3373         * testsuite/20_util/is_nothrow_invocable/requirements/typedefs.cc:
3374         Likewise.
3375         * testsuite/20_util/is_nothrow_swappable/requirements/explicit_instantiation.cc:
3376         Likewise.
3377         * testsuite/20_util/is_nothrow_swappable/requirements/typedefs.cc:
3378         Likewise.
3379         * testsuite/20_util/is_nothrow_swappable/value.cc: Likewise.
3380         * testsuite/20_util/is_nothrow_swappable_with/requirements/explicit_instantiation.cc:
3381         Likewise.
3382         * testsuite/20_util/is_nothrow_swappable_with/requirements/typedefs.cc:
3383         Likewise.
3384         * testsuite/20_util/is_nothrow_swappable_with/value.cc:
3385         Likewise.
3386         * testsuite/20_util/is_swappable/requirements/explicit_instantiation.cc:
3387         Likewise.
3388         * testsuite/20_util/is_swappable/requirements/typedefs.cc:
3389         Likewise.
3390         * testsuite/20_util/is_swappable/value.cc: Likewise.
3391         * testsuite/20_util/is_swappable_with/requirements/explicit_instantiation.cc:
3392         Likewise.
3393         * testsuite/20_util/is_swappable_with/requirements/typedefs.cc:
3394         Likewise.
3395         * testsuite/20_util/is_swappable_with/value.cc: Likewise.
3396         * testsuite/20_util/logical_traits/requirements/explicit_instantiation.cc:
3397         Likewise.
3398         * testsuite/20_util/logical_traits/requirements/typedefs.cc:
3399         Likewise.
3400         * testsuite/20_util/logical_traits/value.cc: Likewise.
3401         * testsuite/20_util/optional/constexpr/make_optional.cc: Likewise.
3402         * testsuite/20_util/optional/constexpr/observers/2.cc: Likewise.
3403         * testsuite/20_util/optional/constexpr/observers/3.cc: Likewise.
3404         * testsuite/20_util/optional/hash.cc: Likewise.
3405         * testsuite/20_util/pair/swap_cxx17.cc: Likewise.
3406         * testsuite/20_util/ratio/requirements/ratio_equal_v.cc: Likewise.
3407         * testsuite/20_util/shared_ptr/requirements/weak_type.cc:
3408         Likewise.
3409         * testsuite/20_util/specialized_algorithms/memory_management_tools/1.cc:
3410         Likewise.
3411         * testsuite/20_util/tuple/apply/1.cc: Likewise.
3412         * testsuite/20_util/tuple/make_from_tuple/1.cc: Likewise.
3413         * testsuite/20_util/tuple/swap_cxx17.cc: Likewise.
3414         * testsuite/20_util/tuple/tuple_size_v.cc: Likewise.
3415         * testsuite/20_util/unique_ptr/specialized_algorithms/swap_cxx17.cc:
3416         Likewise.
3417         * testsuite/20_util/uses_allocator/requirements/uses_allocator_v.cc:
3418         Likewise.
3419         * testsuite/20_util/variant/any.cc: Likewise.
3420         * testsuite/20_util/variant/compile.cc: Likewise.
3421         * testsuite/20_util/variant/hash.cc: Likewise.
3422         * testsuite/20_util/variant/index_type.cc: Likewise.
3423         * testsuite/20_util/variant/run.cc: Likewise.
3424         * testsuite/20_util/void_t/1.cc: Likewise.
3425         * testsuite/21_strings/basic_string/79162.cc: Likewise.
3426         * testsuite/21_strings/basic_string/cons/char/7.cc: Likewise.
3427         * testsuite/21_strings/basic_string/cons/wchar_t/7.cc: Likewise.
3428         * testsuite/21_strings/basic_string/lwg2758.cc: Likewise.
3429         * testsuite/21_strings/basic_string/lwg2946.cc: Likewise.
3430         * testsuite/21_strings/basic_string/modifiers/append/char/4.cc:
3431         Likewise.
3432         * testsuite/21_strings/basic_string/modifiers/append/wchar_t/4.cc:
3433         Likewise.
3434         * testsuite/21_strings/basic_string/modifiers/assign/char/4.cc:
3435         Likewise.
3436         * testsuite/21_strings/basic_string/modifiers/assign/wchar_t/4.cc:
3437         Likewise.
3438         * testsuite/21_strings/basic_string/modifiers/insert/char/3.cc:
3439         Likewise.
3440         * testsuite/21_strings/basic_string/modifiers/insert/wchar_t/3.cc:
3441         Likewise.
3442         * testsuite/21_strings/basic_string/modifiers/replace/char/7.cc:
3443         Likewise.
3444         * testsuite/21_strings/basic_string/modifiers/replace/wchar_t/7.cc:
3445         Likewise.
3446         * testsuite/21_strings/basic_string/operations/compare/char/2.cc:
3447         Likewise.
3448         * testsuite/21_strings/basic_string/operations/compare/wchar_t/2.cc:
3449         Likewise.
3450         * testsuite/21_strings/basic_string/operations/data/char/2.cc:
3451         Likewise.
3452         * testsuite/21_strings/basic_string/operations/data/wchar_t/2.cc:
3453         Likewise.
3454         * testsuite/21_strings/basic_string/operations/find/char/5.cc:
3455         Likewise.
3456         * testsuite/21_strings/basic_string/operations/find/wchar_t/5.cc:
3457         Likewise.
3458         * testsuite/21_strings/basic_string/operators/char/5.cc: Likewise.
3459         * testsuite/21_strings/basic_string/operators/wchar_t/5.cc:
3460         Likewise.
3461         * testsuite/21_strings/basic_string_view/capacity/1.cc: Likewise.
3462         * testsuite/21_strings/basic_string_view/cons/char/1.cc: Likewise.
3463         * testsuite/21_strings/basic_string_view/cons/char/2.cc: Likewise.
3464         * testsuite/21_strings/basic_string_view/cons/char/3.cc: Likewise.
3465         * testsuite/21_strings/basic_string_view/cons/wchar_t/1.cc:
3466         Likewise.
3467         * testsuite/21_strings/basic_string_view/cons/wchar_t/2.cc:
3468         Likewise.
3469         * testsuite/21_strings/basic_string_view/cons/wchar_t/3.cc:
3470         Likewise.
3471         * testsuite/21_strings/basic_string_view/element_access/char/1.cc:
3472         Likewise.
3473         * testsuite/21_strings/basic_string_view/element_access/char/2.cc:
3474         Likewise.
3475         * testsuite/21_strings/basic_string_view/element_access/char/empty.cc:
3476         Likewise.
3477         * testsuite/21_strings/basic_string_view/element_access/char/front_back.cc:
3478         Likewise.
3479         * testsuite/21_strings/basic_string_view/element_access/wchar_t/1.cc:
3480         Likewise.
3481         * testsuite/21_strings/basic_string_view/element_access/wchar_t/2.cc:
3482         Likewise.
3483         * testsuite/21_strings/basic_string_view/element_access/wchar_t/empty.cc:
3484         Likewise.
3485         * testsuite/21_strings/basic_string_view/element_access/wchar_t/front_back.cc:
3486         Likewise.
3487         * testsuite/21_strings/basic_string_view/include.cc: Likewise.
3488         * testsuite/21_strings/basic_string_view/inserters/char/1.cc:
3489         Likewise.
3490         * testsuite/21_strings/basic_string_view/inserters/char/2.cc:
3491         Likewise.
3492         * testsuite/21_strings/basic_string_view/inserters/char/3.cc:
3493         Likewise.
3494         * testsuite/21_strings/basic_string_view/inserters/pod/10081-out.cc:
3495         Likewise.
3496         * testsuite/21_strings/basic_string_view/inserters/wchar_t/1.cc:
3497         Likewise.
3498         * testsuite/21_strings/basic_string_view/inserters/wchar_t/2.cc:
3499         Likewise.
3500         * testsuite/21_strings/basic_string_view/inserters/wchar_t/3.cc:
3501         Likewise.
3502         * testsuite/21_strings/basic_string_view/literals/types-char8_t.cc:
3503         Likewise.
3504         * testsuite/21_strings/basic_string_view/literals/types.cc:
3505         Likewise.
3506         * testsuite/21_strings/basic_string_view/literals/values-char8_t.cc:
3507         Likewise.
3508         * testsuite/21_strings/basic_string_view/literals/values.cc:
3509         Likewise.
3510         * testsuite/21_strings/basic_string_view/modifiers/remove_prefix/char/1.cc:
3511         Likewise.
3512         * testsuite/21_strings/basic_string_view/modifiers/remove_prefix/wchar_t/1.cc:
3513         Likewise.
3514         * testsuite/21_strings/basic_string_view/modifiers/remove_suffix/char/1.cc:
3515         Likewise.
3516         * testsuite/21_strings/basic_string_view/modifiers/remove_suffix/wchar_t/1.cc:
3517         Likewise.
3518         * testsuite/21_strings/basic_string_view/operations/compare/char/1.cc:
3519         Likewise.
3520         * testsuite/21_strings/basic_string_view/operations/compare/char/13650.cc:
3521         Likewise.
3522         * testsuite/21_strings/basic_string_view/operations/compare/wchar_t/1.cc:
3523         Likewise.
3524         * testsuite/21_strings/basic_string_view/operations/compare/wchar_t/13650.cc:
3525         Likewise.
3526         * testsuite/21_strings/basic_string_view/operations/copy/char/1.cc:
3527         Likewise.
3528         * testsuite/21_strings/basic_string_view/operations/copy/wchar_t/1.cc:
3529         Likewise.
3530         * testsuite/21_strings/basic_string_view/operations/data/char/1.cc:
3531         Likewise.
3532         * testsuite/21_strings/basic_string_view/operations/data/wchar_t/1.cc:
3533         Likewise.
3534         * testsuite/21_strings/basic_string_view/operations/find/char/1.cc:
3535         Likewise.
3536         * testsuite/21_strings/basic_string_view/operations/find/char/2.cc:
3537         Likewise.
3538         * testsuite/21_strings/basic_string_view/operations/find/char/3.cc:
3539         Likewise.
3540         * testsuite/21_strings/basic_string_view/operations/find/char/4.cc:
3541         Likewise.
3542         * testsuite/21_strings/basic_string_view/operations/find/wchar_t/1.cc:
3543         Likewise.
3544         * testsuite/21_strings/basic_string_view/operations/find/wchar_t/2.cc:
3545         Likewise.
3546         * testsuite/21_strings/basic_string_view/operations/find/wchar_t/3.cc:
3547         Likewise.
3548         * testsuite/21_strings/basic_string_view/operations/find/wchar_t/4.cc:
3549         Likewise.
3550         * testsuite/21_strings/basic_string_view/operations/rfind/char/1.cc:
3551         Likewise.
3552         * testsuite/21_strings/basic_string_view/operations/rfind/char/2.cc:
3553         Likewise.
3554         * testsuite/21_strings/basic_string_view/operations/rfind/char/3.cc:
3555         Likewise.
3556         * testsuite/21_strings/basic_string_view/operations/rfind/wchar_t/1.cc:
3557         Likewise.
3558         * testsuite/21_strings/basic_string_view/operations/rfind/wchar_t/2.cc:
3559         Likewise.
3560         * testsuite/21_strings/basic_string_view/operations/rfind/wchar_t/3.cc:
3561         Likewise.
3562         * testsuite/21_strings/basic_string_view/operations/string_conversion/1.cc:
3563         Likewise.
3564         * testsuite/21_strings/basic_string_view/operations/substr/char/1.cc:
3565         Likewise.
3566         * testsuite/21_strings/basic_string_view/operations/substr/wchar_t/1.cc:
3567         Likewise.
3568         * testsuite/21_strings/basic_string_view/range_access/char/1.cc:
3569         Likewise.
3570         * testsuite/21_strings/basic_string_view/range_access/wchar_t/1.cc:
3571         Likewise.
3572         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/1.cc:
3573         Likewise.
3574         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/char/1.cc:
3575         Likewise.
3576         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/char16_t/1.cc:
3577         Likewise.
3578         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/char32_t/1.cc:
3579         Likewise.
3580         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/char8_t/1.cc:
3581         Likewise.
3582         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/wchar_t/1.cc:
3583         Likewise.
3584         * testsuite/21_strings/basic_string_view/requirements/typedefs.cc:
3585         Likewise.
3586         * testsuite/21_strings/basic_string_view/typedefs.cc: Likewise.
3587         * testsuite/21_strings/basic_string_view/types/1.cc: Likewise.
3588         * testsuite/23_containers/array/specialized_algorithms/swap_cxx17.cc:
3589         Likewise.
3590         * testsuite/23_containers/map/modifiers/extract.cc: Likewise.
3591         * testsuite/23_containers/map/modifiers/insert_or_assign/1.cc:
3592         Likewise.
3593         * testsuite/23_containers/map/modifiers/merge.cc: Likewise.
3594         * testsuite/23_containers/map/modifiers/try_emplace/1.cc: Likewise.
3595         * testsuite/23_containers/multimap/modifiers/extract.cc: Likewise.
3596         * testsuite/23_containers/multimap/modifiers/merge.cc: Likewise.
3597         * testsuite/23_containers/multiset/modifiers/extract.cc: Likewise.
3598         * testsuite/23_containers/multiset/modifiers/merge.cc: Likewise.
3599         * testsuite/23_containers/set/modifiers/extract.cc: Likewise.
3600         * testsuite/23_containers/set/modifiers/merge.cc: Likewise.
3601         * testsuite/23_containers/unordered_map/modifiers/extract.cc:
3602         Likewise.
3603         * testsuite/23_containers/unordered_map/modifiers/insert_or_assign.cc:
3604         Likewise.
3605         * testsuite/23_containers/unordered_map/modifiers/merge.cc:
3606         Likewise.
3607         * testsuite/23_containers/unordered_map/modifiers/try_emplace.cc:
3608         Likewise.
3609         * testsuite/23_containers/unordered_multimap/modifiers/extract.cc:
3610         Likewise.
3611         * testsuite/23_containers/unordered_multimap/modifiers/merge.cc:
3612         Likewise.
3613         * testsuite/23_containers/unordered_multiset/modifiers/extract.cc:
3614         Likewise.
3615         * testsuite/23_containers/unordered_multiset/modifiers/merge.cc:
3616         Likewise.
3617         * testsuite/23_containers/unordered_set/modifiers/extract.cc:
3618         Likewise.
3619         * testsuite/23_containers/unordered_set/modifiers/merge.cc:
3620         Likewise.
3621         * testsuite/24_iterators/headers/iterator/range_access_c++17.cc:
3622         Likewise.
3623         * testsuite/24_iterators/headers/iterator/synopsis_c++17.cc:
3624         Likewise.
3625         * testsuite/25_algorithms/clamp/1.cc: Likewise.
3626         * testsuite/25_algorithms/clamp/2.cc: Likewise.
3627         * testsuite/25_algorithms/clamp/constexpr.cc: Likewise.
3628         * testsuite/25_algorithms/clamp/requirements/explicit_instantiation/1.cc:
3629         Likewise.
3630         * testsuite/25_algorithms/clamp/requirements/explicit_instantiation/pod.cc:
3631         Likewise.
3632         * testsuite/26_numerics/headers/cmath/functions_std_c++17.cc:
3633         Likewise.
3634         * testsuite/26_numerics/headers/cmath/special_functions_global.cc:
3635         Likewise.
3636         * testsuite/27_io/basic_ostream/inserters_other/char/lwg2221.cc:
3637         Likewise.
3638         * testsuite/29_atomics/atomic/is_always_lock_free.cc: Likewise.
3639         * testsuite/29_atomics/atomic_integral/is_always_lock_free.cc:
3640         Likewise.
3641         * testsuite/30_threads/shared_lock/70766.cc: Likewise.
3642         * testsuite/30_threads/shared_mutex/cons/1.cc: Likewise.
3643         * testsuite/30_threads/shared_mutex/cons/assign_neg.cc:
3644         Likewise.
3645         * testsuite/30_threads/shared_mutex/cons/copy_neg.cc:
3646         Likewise.
3647         * testsuite/30_threads/shared_mutex/requirements/standard_layout.cc:
3648         Likewise.
3649         * testsuite/30_threads/shared_mutex/try_lock/1.cc: Likewise.
3650         * testsuite/30_threads/shared_mutex/try_lock/2.cc: Likewise.
3651         * testsuite/30_threads/shared_mutex/unlock/1.cc: Likewise.
3652
3653 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
3654
3655         PR libstdc++/96382
3656         * include/bits/stl_iterator.h (reverse_iterator): Friend
3657         declaration should not depend on __cplusplus.
3658
3659 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
3660
3661         * testsuite/experimental/filesystem/filesystem_error/cons.cc:
3662         Remove -std=gnu++17 option.
3663
3664 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
3665
3666         * testsuite/20_util/is_aggregate/value.cc: Adjust for changes to
3667         definition of aggregates in C++20.
3668         * testsuite/20_util/optional/requirements.cc: Adjust for
3669         defaulted comparisons in C++20.
3670
3671 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
3672
3673         * testsuite/20_util/tuple/78939.cc: Suppress warnings about
3674         deprecation of volatile-qualified structured bindings in C++20.
3675         * testsuite/20_util/variable_templates_for_traits.cc: Likewise
3676         for deprecation of is_pod in C++20
3677
3678 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
3679
3680         * testsuite/20_util/time_point_cast/rounding.cc: Remove
3681         duplicate dg-do directive and add c++17 effective target.
3682
3683 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
3684
3685         * src/c++17/floating_from_chars.cc (from_chars_impl): Use
3686         LC_ALL_MASK not LC_ALL.
3687
3688 2020-07-31  Richard Biener  <rguenther@suse.de>
3689
3690         PR debug/96383
3691         * testsuite/20_util/assume_aligned/3.cc: Use -g0.
3692
3693 2020-07-30  Jonathan Wakely  <jwakely@redhat.com>
3694
3695         * include/bits/basic_string.h (size_type, difference_type):
3696         Use allocator_traits to obtain the allocator's size_type and
3697         difference_type.
3698
3699 2020-07-30  Jonathan Wakely  <jwakely@redhat.com>
3700
3701         PR libstdc++/96279
3702         * src/c++17/floating_from_chars.cc (from_chars_impl): Use
3703         isinf unqualified.
3704         [!_GLIBCXX_USE_C99_STDLIB]: Use strtod for float and long
3705         double.
3706
3707 2020-07-30  Jonathan Wakely  <jwakely@redhat.com>
3708
3709         * testsuite/23_containers/unordered_multiset/cons/noexcept_default_construct.cc:
3710         Use allocator with the correct value type.
3711         * testsuite/23_containers/unordered_set/cons/noexcept_default_construct.cc:
3712         Likewise.
3713
3714 2020-07-30  Jonathan Wakely  <jwakely@redhat.com>
3715
3716         * testsuite/20_util/from_chars/4.cc: Pass non-const iterator
3717         to string::insert.
3718
3719 2020-07-30  Jonathan Wakely  <jwakely@redhat.com>
3720
3721         * include/bits/iterator_concepts.h (__detail::__cv_bool): New
3722         helper concept.
3723         (__detail::__integral_nonbool): Likewise.
3724         (__detail::__is_integer_like): Use __integral_nonbool.
3725         * testsuite/std/ranges/access/lwg3467.cc: New test.
3726
3727 2020-07-30  Jonathan Wakely  <jwakely@redhat.com>
3728
3729         * testsuite/20_util/from_chars/4.cc: Use dg-add-options ieee.
3730         * testsuite/29_atomics/atomic_float/1.cc: Likewise.
3731
3732 2020-07-30  Jonathan Wakely  <jwakely@redhat.com>
3733
3734         * testsuite/23_containers/vector/bool/72847.cc: Use the
3735         exceptions_enabled effective-target keyword instead of
3736         checking for an explicit -fno-exceptions option.
3737         * testsuite/util/testsuite_abi.cc (examine_symbol): Remove
3738         redundant try-catch.
3739         * testsuite/util/testsuite_allocator.h [!__cpp_exceptions]:
3740         Do not define check_allocate_max_size and memory_resource.
3741         * testsuite/util/testsuite_containers.h: Replace comment with
3742         #error if wrong standard dialect used.
3743         * testsuite/util/testsuite_shared.cc: Likewise.
3744
3745 2020-07-29  François Dumont  <fdumont@gcc.gnu.org>
3746
3747         * include/bits/hashtable_policy.h (_Node_iterator_base()): New.
3748         (operator==(const _Node_iterator_base&, const _Node_iterator_base&)):
3749         Make hidden friend.
3750         (operator!=(const _Node_iterator_base&, const _Node_iterator_base&)):
3751         Make hidden friend.
3752         (_Local_iterator_base<>): Inherits _Node_iterator_base.
3753         (_Local_iterator_base<>::_M_cur): Remove.
3754         (_Local_iterator_base<>::_M_curr()): Remove.
3755         (operator==(const _Local_iterator_base&, const _Local_iterator_base&)):
3756         Remove.
3757         (operator!=(const _Local_iterator_base&, const _Local_iterator_base&)):
3758         Remove.
3759         * include/debug/unordered_map (unordered_map<>::_M_invalidate): Adapt.
3760         (unordered_multimap<>::_M_invalidate): Adapt.
3761         * include/debug/unordered_set (unordered_set<>::_M_invalidate): Adapt.
3762         (unordered_multiset<>::_M_invalidate): Adapt.
3763
3764 2020-07-29  David Edelsohn  <dje.gcc@gmail.com>
3765             Jonathan Wakely  <jwakely@redhat.com>
3766             Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
3767
3768         * testsuite/lib/dg-options.exp (add_options_for_libatomic): Add
3769         target powerpc-ibm-aix* and powerpc*-*-darwin*.
3770         * testsuite/29_atomics/atomic_float/value_init.cc: Add options
3771         for libatomic.
3772
3773 2020-07-29  François Dumont  <fdumont@gcc.gnu.org>
3774
3775         * include/bits/hashtable.h
3776         (_Hashtable(_Hashtable&& __ht, __node_alloc_type&& __a, true_type)):
3777         Add noexcept qualification.
3778         (_Hashtable(_Hashtable&&)): Fix noexcept qualification.
3779         (_Hashtable(_Hashtable&&, const allocator_type&)): Add noexcept
3780         qualification.
3781         * include/bits/unordered_map.h
3782         (unordered_map(unordered_map&&, const allocator_type&)): Add noexcept
3783         qualification.
3784         (unordered_multimap(unordered_multimap&&, const allocator_type&)):
3785         Likewise.
3786         * include/bits/unordered_set.h
3787         (unordered_set(unordered_set&&, const allocator_type&)): Likewise.
3788         (unordered_multiset(unordered_multiset&&, const allocator_type&)):
3789         Likewise.
3790         * include/debug/unordered_map
3791         (unordered_map(unordered_map&&, const allocator_type&)): Likewise.
3792         (unordered_multimap(unordered_multimap&&, const allocator_type&)):
3793         Likewise.
3794         * include/debug/unordered_set
3795         (unordered_set(unordered_set&&, const allocator_type&)): Likewise.
3796         (unordered_multiset(unordered_multiset&&, const allocator_type&)):
3797         Likewise.
3798         * testsuite/23_containers/unordered_map/allocator/default_init.cc:
3799         New test.
3800         * testsuite/23_containers/unordered_map/cons/noexcept_default_construct.cc:
3801         New test.
3802         * testsuite/23_containers/unordered_map/cons/noexcept_move_construct.cc:
3803         New test.
3804         * testsuite/23_containers/unordered_map/modifiers/move_assign.cc:
3805         New test.
3806         * testsuite/23_containers/unordered_multimap/cons/noexcept_default_construct.cc:
3807         New test.
3808         * testsuite/23_containers/unordered_multimap/cons/noexcept_move_construct.cc:
3809         New test.
3810         * testsuite/23_containers/unordered_multiset/cons/noexcept_default_construct.cc:
3811         New test.
3812         * testsuite/23_containers/unordered_multiset/cons/noexcept_move_construct.cc:
3813         New test.
3814         * testsuite/23_containers/unordered_set/allocator/default_init.cc:
3815         New test.
3816         * testsuite/23_containers/unordered_set/cons/noexcept_default_construct.cc:
3817         New test.
3818         * testsuite/23_containers/unordered_set/cons/noexcept_move_construct.cc:
3819         New test.
3820
3821 2020-07-28  François Dumont  <fdumont@gcc.gnu.org>
3822
3823         * include/bits/hashtable.h
3824         (_Hashtable<>(_InputIterator, _InputIterator, size_t, const _H1&,
3825         const _H2&, const _Hash&, const _Equal&, const _ExtractKey&,
3826         const allocator_type&, true_type)): New.
3827         (_Hashtable<>(_InputIterator, _InputIterator, size_t, const _H1&,
3828         const _H2&, const _Hash&, const _Equal&, const _ExtractKey&,
3829         const allocator_type&, false_type)): New.
3830         (_Hashtable<>(_InputIterator, _InputIterator, size_t, const _H1&,
3831         const _H2&, const _Hash&, const _Equal&, const _ExtractKey&,
3832         const allocator_type&)): Delegate to latters.
3833         (operator=(initializer_list<value_type>)): Rehash if too small.
3834         (_M_insert(_Arg&&, const _NodeGenerator&, true_type)): Remove
3835         size_t len parameter.
3836         * include/bits/hashtable_policy.h (_Insert_base<>::_M_insert_range):
3837         Do not try to get input range distance.
3838         * testsuite/23_containers/unordered_set/cons/bucket_hint.cc: New test.
3839         * testsuite/23_containers/unordered_set/modifiers/insert.cc: New test.
3840
3841 2020-07-27  François Dumont  <fdumont@gcc.gnu.org>
3842
3843         * include/bits/hashtable_policy.h (_Map_base<>::at): Use
3844         _Hashtable<>::find.
3845         (_Hashtable_base<>::_Equal_hash_code<>::_S_node_equals):New.
3846         (_Hashtable_base<>::_M_node_equals): New, use latter.
3847         (_Equality<_Key, _Value, _Alloc, _ExtractKey, _Equal, _H1, _H2, _Hash,
3848         _RehashPolicy, false>::_M_equal): Adapt to use latter.
3849         * include/bits/hashtable.h (_Hashtable<>::_M_update_bbegin): New.
3850         (_Hashtable<>::_M_assign): Use latter.
3851         (_Hashtable<>::_M_move_assign): Likewise.
3852         (_Hashtable<>(_Hashtable<>&&)): Likewise.
3853         (_Hashtable<>(_Hashtable<>&&, const allocator_type&)): Likewise.
3854         (_Hashtable<>::swap): Likewise.
3855         (_Hashtable<>::find): Build iterator directly from _M_find_node result.
3856         (_Hashtable<>::count): Use _Hashtable<>::find.
3857         (_Hashtable<>::equal_range): Likewise.
3858         (_Hashtable<>::_M_erase(false_type, const key_type&)): Use
3859         _M_node_equals.
3860
3861 2020-07-27  Jonathan Wakely  <jwakely@redhat.com>
3862
3863         * src/c++17/floating_from_chars.cc (from_chars_impl): Ensure
3864         that FE_NEAREST is used.
3865         * testsuite/20_util/from_chars/4.cc: Do not use if constexpr in
3866         a { target c++14 } test.
3867         [!_GLIBCXX_HAVE_USELOCALE]: Disable all tests.
3868         * testsuite/20_util/from_chars/5.cc [!_GLIBCXX_HAVE_USELOCALE]:
3869         Likewise.
3870         * testsuite/20_util/from_chars/6.cc: New test.
3871
3872 2020-07-22  Jonathan Wakely  <jwakely@redhat.com>
3873
3874         * include/std/future (future, shared_future, promise): Add
3875         static assertions to the primary template to reject array and
3876         function types.
3877         * testsuite/30_threads/future/requirements/lwg3458.cc: New test.
3878         * testsuite/30_threads/promise/requirements/lwg3466.cc: New test.
3879         * testsuite/30_threads/shared_future/requirements/lwg3458.cc: New test.
3880
3881 2020-07-22  Jonathan Wakely  <jwakely@redhat.com>
3882
3883         * include/bits/stl_iterator.h (reverse_iterator): Constrain
3884         converting constructor and converting assignment operator.
3885         Access source iterator's data member directly instead of
3886         calling base().
3887         (move_iterator): Likewise.
3888         * testsuite/24_iterators/move_iterator/dr3435.cc: New test.
3889         * testsuite/24_iterators/reverse_iterator/dr3435.cc: New test.
3890
3891 2020-07-20  Jonathan Wakely  <jwakely@redhat.com>
3892
3893         * acinclude.m4 (libtool_VERSION): Bump version.
3894         * config.h.in: Regenerate.
3895         * config/abi/pre/gnu.ver: Add GLIBCXX_3.4.29 version and new
3896         exports.
3897         * config/os/gnu-linux/ldbl-extra.ver: Add _GLIBCXX_LDBL_3.4.29
3898         version and new export.
3899         * configure: Regenerate.
3900         * configure.ac: Check for <xlocale.h> and uselocale.
3901         * crossconfig.m4: Add macro or checks for uselocale.
3902         * include/std/charconv (from_chars): Declare overloads for
3903         float, double, and long double.
3904         * src/c++17/Makefile.am: Add new file.
3905         * src/c++17/Makefile.in: Regenerate.
3906         * src/c++17/floating_from_chars.cc: New file.
3907         (from_chars): Define for float, double, and long double.
3908         * testsuite/20_util/from_chars/1_c++20_neg.cc: Prune extra
3909         diagnostics caused by new overloads.
3910         * testsuite/20_util/from_chars/1_neg.cc: Likewise.
3911         * testsuite/20_util/from_chars/2.cc: Check leading '+'.
3912         * testsuite/20_util/from_chars/4.cc: New test.
3913         * testsuite/20_util/from_chars/5.cc: New test.
3914         * testsuite/util/testsuite_abi.cc: Add new symbol versions.
3915
3916 2020-07-20  Jonathan Wakely  <jwakely@redhat.com>
3917
3918         * include/bits/istream.tcc
3919         (basic_istream::get(__streambuf_type&, char_type): Use unsigned
3920         long long for counter and check if it would overflow _M_gcount.
3921         * testsuite/27_io/basic_istream/get/char/lwg3464.cc: New test.
3922         * testsuite/27_io/basic_istream/get/wchar_t/lwg3464.cc: New test.
3923
3924 2020-07-17  Iain Sandoe  <iain@sandoe.co.uk>
3925
3926         * include/std/coroutine: Mark the methods of the
3927         trivial awaitables as constexpr.
3928
3929 2020-07-14  David Edelsohn  <dje.gcc@gmail.com>
3930
3931         * config/os/aix/t-aix: Set BITS from compiler cpp macro.
3932
3933 2020-07-13  Jonathan Wakely  <jwakely@redhat.com>
3934
3935         PR libstdc++/94749
3936         PR libstdc++/96161
3937         * include/bits/istream.tcc (basic_istream::ignore(streamsize))
3938         [n == max]: Check overflow conditions on _M_gcount. Rely on
3939         the fact that either EOF or the delimiter was reached.
3940         [n < max]: Check _M_gcount < n before checking for EOF or
3941         delimiter.
3942         (basic_istream::ignore(streamsize, char_type): Likewise.
3943         * src/c++98/compatibility.cc (istream::ignore(streamsize))
3944         (wistream::ignore(streamsize)): Likewise.
3945         * src/c++98/istream.cc (istream::ignore(streamsize, char_type))
3946         (wistream::ignore(streamsize, char_type)): Likewise.
3947         * testsuite/27_io/basic_istream/ignore/char/94749.cc: Check that
3948         delimiter is discarded if the number of characters ignored
3949         doesn't fit in streamsize.
3950         * testsuite/27_io/basic_istream/ignore/wchar_t/94749.cc:
3951         Likewise.
3952         * testsuite/27_io/basic_istream/ignore/char/96161.cc: New test.
3953         * testsuite/27_io/basic_istream/ignore/wchar_t/96161.cc: New test.
3954
3955 2020-07-08  François Dumont  <fdumont@gcc.gnu.org>
3956
3957         * include/bits/stl_tree.h (_Rb_tree_impl(_Rb_tree_impl&&)): Add noexcept
3958         qualification based only on _Compare one.
3959         * testsuite/23_containers/map/cons/noexcept_move_construct.cc: Add
3960         static asserts.
3961         * testsuite/23_containers/multimap/cons/noexcept_move_construct.cc:
3962         Likewise.
3963         * testsuite/23_containers/multiset/cons/noexcept_move_construct.cc:
3964         Likewise.
3965         * testsuite/23_containers/set/cons/noexcept_move_construct.cc: Likewise.
3966
3967 2020-07-07  Jonathan Wakely  <jwakely@redhat.com>
3968
3969         * include/std/limits: Whitespace changes.
3970
3971 2020-07-07  Jonathan Wakely  <jwakely@redhat.com>
3972
3973         * include/Makefile.am: Remove bits/int_limits.h.
3974         * include/Makefile.in: Regenerate.
3975         * include/bits/int_limits.h: Removed.
3976         * include/bits/parse_numbers.h (_Select_int_base): Replace
3977         __int_limits with __int_traits.
3978         * include/bits/range_access.h (_SSize::operator()): Likewise.
3979         * include/ext/numeric_traits.h (__numeric_traits_integer): Add
3980         static assertion.
3981         (__int_traits): New alias template.
3982         * include/std/bit (__rotl, __rotr, __countl_zero, __countl_one)
3983         (__countr_zero, __countr_one, __popcount, __bit_ceil)
3984         (__bit_floor, __bit_width) Replace __int_limits with
3985         __int_traits.
3986         * include/std/charconv (__to_chars_8, __from_chars_binary)
3987         (__from_chars_alpha_to_num, from_chars): Likewise.
3988         * include/std/memory_resource (polymorphic_allocator::allocate)
3989         (polymorphic_allocator::allocate_object): Likewise.
3990         * include/std/string_view (basic_string_view::_S_compare):
3991         Likewise.
3992         * include/std/utility (cmp_equal, cmp_less, in_range): Likewise.
3993
3994 2020-07-07  Jonathan Wakely  <jwakely@redhat.com>
3995
3996         * include/std/limits: Whitespace changes.
3997
3998 2020-07-06  Jonathan Wakely  <jwakely@redhat.com>
3999
4000         * include/std/optional (_Optional_payload_base, _Optional_base)
4001         (optional, __optional_hash_call_base): Adjust whitespace and
4002         other formatting. Remove redundant && tokens on template
4003         arguments to type traits.
4004
4005 2020-07-06  Jonathan Wakely  <jwakely@redhat.com>
4006
4007         * include/std/optional (make_optional): Add enable_if
4008         constraints and noexcept-specifier to each overload.
4009         * testsuite/20_util/optional/make_optional-2.cc: New test.
4010
4011 2020-07-06  Jonathan Wakely  <jwakely@redhat.com>
4012
4013         PR libstdc++/96036
4014         * include/std/optional (optional): Add noexcept-specifier to
4015         every constructor, assignment operator, emplace function and
4016         dereference operator.
4017         * testsuite/20_util/optional/assignment/noexcept.cc: New test.
4018         * testsuite/20_util/optional/cons/noexcept.cc: New test.
4019
4020 2020-07-06  Jonathan Wakely  <jwakely@redhat.com>
4021
4022         PR libstdc++/96063
4023         * include/bits/fs_dir.h: Use consistent tag in class-head.
4024         * include/bits/localefwd.h: Likewise.
4025         * include/bits/regex.h: Likewise.
4026         * include/bits/stl_map.h: Likewise.
4027         * include/bits/stl_multimap.h: Likewise.
4028         * include/bits/stl_multiset.h: Likewise.
4029         * include/bits/stl_set.h: Likewise.
4030         * include/std/complex: Likewise.
4031         * include/std/functional: Likewise.
4032         * include/std/future: Likewise.
4033         * include/std/system_error: Likewise.
4034         * include/std/thread: Likewise.
4035         * include/std/tuple: Likewise.
4036         * include/std/type_traits: Likewise.
4037         * include/std/valarray: Likewise.
4038
4039 2020-07-02  Jonathan Wakely  <jwakely@redhat.com>
4040
4041         * testsuite/27_io/basic_ios/conv/voidptr.cc: Add c++98_only
4042         target selector.
4043
4044 2020-07-02  Jonathan Wakely  <jwakely@redhat.com>
4045
4046         * testsuite/18_support/headers/cstdalign/std_c++0x_neg.cc: Add
4047         c++98_only target selector.
4048         * testsuite/18_support/headers/cstdbool/std_c++0x_neg.cc:
4049         Likewise.
4050         * testsuite/18_support/headers/cstdint/std_c++0x_neg.cc:
4051         Likewise.
4052         * testsuite/18_support/headers/new/synopsis_cxx98.cc: Likewise.
4053         * testsuite/19_diagnostics/headers/system_error/std_c++0x_neg.cc:
4054         Likewise.
4055         * testsuite/20_util/headers/type_traits/std_c++0x_neg.cc:
4056         Likewise.
4057         * testsuite/23_containers/headers/array/std_c++0x_neg.cc:
4058         Likewise.
4059         * testsuite/23_containers/headers/tuple/std_c++0x_neg.cc:
4060         Likewise.
4061         * testsuite/23_containers/headers/unordered_map/std_c++0x_neg.cc:
4062         Likewise.
4063         * testsuite/23_containers/headers/unordered_set/std_c++0x_neg.cc:
4064         Likewise.
4065         * testsuite/26_numerics/headers/ccomplex/std_c++0x_neg.cc:
4066         Likewise.
4067         * testsuite/26_numerics/headers/cfenv/std_c++0x_neg.cc:
4068         Likewise.
4069         * testsuite/26_numerics/headers/cmath/c99_classification_macros_c++98.cc:
4070         Likewise.
4071         * testsuite/26_numerics/headers/ctgmath/std_c++0x_neg.cc:
4072         Likewise.
4073         * testsuite/26_numerics/headers/random/std_c++0x_neg.cc:
4074         Likewise.
4075         * testsuite/27_io/headers/cinttypes/std_c++0x_neg.cc: Likewise.
4076         * testsuite/28_regex/headers/regex/std_c++0x_neg.cc: Likewise.
4077         * testsuite/29_atomics/headers/atomic/std_c++0x_neg.cc:
4078         Likewise.
4079         * testsuite/30_threads/headers/condition_variable/std_c++0x_neg.cc:
4080         Likewise.
4081         * testsuite/30_threads/headers/future/std_c++0x_neg.cc:
4082         Likewise.
4083         * testsuite/30_threads/headers/mutex/std_c++0x_neg.cc: Likewise.
4084         * testsuite/30_threads/headers/thread/std_c++0x_neg.cc:
4085         Likewise.
4086
4087 2020-07-02  Ville Voutilainen  <ville.voutilainen@gmail.com>
4088
4089         PR libstdc++/91807
4090         * include/std/variant
4091         (_Copy_assign_base::operator=(const _Copy_assign_base&):
4092         Do the move-assignment from a temporary so that the temporary
4093         is constructed with an explicit index.
4094         * testsuite/20_util/variant/91807.cc: New.
4095
4096 2020-07-02  Jonathan Wakely  <jwakely.gcc@gmail.com>
4097
4098         PR libstdc++/91153
4099         PR target/93224
4100         * testsuite/29_atomics/atomic_float/1.cc: Use different values
4101         for tests.
4102         * testsuite/29_atomics/atomic_ref/float.cc: Likewise.
4103
4104 2020-07-01  Jonathan Wakely  <jwakely@redhat.com>
4105
4106         PR libstdc++/94627
4107         * include/bits/regex.h (operator==, operator!=): Remove noexcept
4108         equality comparisons for match_results.
4109         * testsuite/28_regex/match_results/94627.cc: New test.
4110
4111 2020-07-01  Martin Sebor  <msebor@redhat.com>
4112
4113         * testsuite/21_strings/basic_string_view/cons/char/nonnull.cc: Adjust
4114         text of expected warning.
4115         * testsuite/21_strings/basic_string_view/cons/wchar_t/nonnull.cc: Same.
4116         * testsuite/21_strings/basic_string_view/operations/compare/char/nonnull.cc: Same.
4117         * testsuite/21_strings/basic_string_view/operations/find/char/nonnull.cc: Same.
4118         * testsuite/21_strings/basic_string_view/operations/rfind/char/nonnull.cc: Same.
4119
4120 2020-06-29  Ville Voutilainen  <ville.voutilainen@gmail.com>
4121
4122         Revert:
4123         2020-06-28  Ville Voutilainen  <ville.voutilainen@gmail.com>
4124
4125         * include/bits/basic_string.h (string(_CharT*, const _Alloc&)):
4126         Add a __nonnull__ attribute.
4127         * testsuite/21_strings/basic_string/cons/char/nonnull.cc: New.
4128         * testsuite/21_strings/basic_string/cons/wchar_t/nonnull.cc: Likewise.
4129
4130 2020-06-28  Ville Voutilainen  <ville.voutilainen@gmail.com>
4131
4132         * include/bits/basic_string.h (string(_CharT*, const _Alloc&)):
4133         Add a __nonnull__ attribute.
4134         * testsuite/21_strings/basic_string/cons/char/nonnull.cc: New.
4135         * testsuite/21_strings/basic_string/cons/wchar_t/nonnull.cc: Likewise.
4136
4137 2020-06-28  Ville Voutilainen  <ville.voutilainen@gmail.com>
4138
4139         PR libstdc++/95915
4140         * include/std/type_traits (is_literal_type, is_literal_type_v):
4141         Deprecate in C++17.
4142         * include/std/variant (_Uninitialized):
4143         Adjust the condition and the comment.
4144         * testsuite/20_util/is_literal_type/deprecated-1z.cc: New.
4145         * testsuite/20_util/is_literal_type/requirements/explicit_instantiation.cc:
4146         Adjust.
4147         * testsuite/20_util/is_literal_type/requirements/typedefs.cc: Likewise.
4148         * testsuite/20_util/is_literal_type/value.cc: Likewise.
4149         * testsuite/20_util/optional/constexpr/nullopt.cc:
4150         Use __is_literal_type directly.
4151         * testsuite/20_util/optional/nullopt.cc: Likewise.
4152         * testsuite/20_util/variable_templates_for_traits.cc: Adjust.
4153         * testsuite/20_util/variant/95915.cc: New.
4154         * testsuite/20_util/variant/compile.cc: Add new test.
4155         * testsuite/experimental/optional/constexpr/nullopt.cc:
4156         Use __is_literal_type directly.
4157         * testsuite/experimental/optional/nullopt.cc: Likewise.
4158         * testsuite/experimental/type_traits/value.cc: Adjust.
4159         * testsuite/util/testsuite_common_types.h:
4160         Use __is_literal_type directly.
4161
4162 2020-06-24  Jonathan Wakely  <jwakely@redhat.com>
4163
4164         * include/std/charconv (__from_chars_binary): Ignore leading zeros.
4165         * testsuite/20_util/from_chars/1.cc: Check "0x1" for all bases,
4166         not just 10 and 16.
4167         * testsuite/20_util/from_chars/3.cc: New test.
4168
4169 2020-06-24  Jonathan Wakely  <jwakely@redhat.com>
4170
4171         * include/bits/stl_algobase.h (__find_if): Add FALLTHRU markers.
4172         * include/std/charconv (__detail::__to_chars): Avoid
4173         -Wsign-compare warning.
4174
4175 2020-06-24  Jonathan Wakely  <jwakely@redhat.com>
4176
4177         PR libstdc++/95851
4178         * include/std/charconv (__to_chars_i): Check for zero-sized
4179         buffer unconditionally.
4180         * testsuite/20_util/to_chars/95851.cc: New test.
4181
4182 2020-06-23  Jonathan Wakely  <jwakely@redhat.com>
4183
4184         * testsuite/20_util/from_chars/1_c++20_neg.cc: Check enumeration
4185         type.
4186         * testsuite/20_util/from_chars/1_neg.cc: Likewise. Move dg-error
4187         directives outside preprocessor condition.
4188
4189 2020-06-23  Jonathan Wakely  <jwakely@redhat.com>
4190
4191         PR libstdc++/95832
4192         * include/std/variant (__detail::__variant::_Build_FUN): Remove
4193         partial specialization to prevent narrowing conversions to bool.
4194         * testsuite/20_util/variant/compile.cc: Test non-narrowing
4195         conversions to bool.
4196         * testsuite/20_util/variant/run.cc: Likewise.
4197
4198 2020-06-23  Jonathan Wakely  <jwakely@redhat.com>
4199
4200         * doc/Makefile.in: Regenerate.
4201         * include/Makefile.in: Regenerate.
4202         * libsupc++/Makefile.in: Regenerate.
4203         * po/Makefile.in: Regenerate.
4204         * python/Makefile.in: Regenerate.
4205         * src/Makefile.in: Regenerate.
4206         * src/c++11/Makefile.in: Regenerate.
4207         * src/c++17/Makefile.in: Regenerate.
4208         * src/c++98/Makefile.in: Regenerate.
4209         * src/filesystem/Makefile.in: Regenerate.
4210         * testsuite/Makefile.in: Regenerate.
4211
4212 2020-06-22  David Edelsohn  <dje.gcc@gmail.com>
4213
4214         * Makefile.am: Use -include.
4215         * Makefile.in: Regenerate.
4216
4217 2020-06-21  David Edelsohn  <dje.gcc@gmail.com>
4218
4219         * Makefile.am (tmake_file): Build and install AIX-style FAT libraries.
4220         * Makefile.in: Regenerate.
4221         * configure.ac (tmake_file): Substitute.
4222         * configure: Regenerate.
4223         * configure.host (aix*): Define tmake_file.
4224         * config/os/aix/t-aix: New file.
4225
4226 2020-06-20  Jason Merrill  <jason@redhat.com>
4227
4228         * testsuite/24_iterators/move_iterator/rel_ops_c++20.cc:
4229         Remove greedy_ops tests.
4230         * testsuite/24_iterators/reverse_iterator/rel_ops_c++20.cc:
4231         Remove greedy_ops tests.
4232
4233 2020-06-19  Jonathan Wakely  <jwakely@redhat.com>
4234
4235         PR libstdc++/95765
4236         * include/bits/stl_algobase.h (__size_to_integer(float))
4237         (__size_to_integer(double), __size_to_integer(long double))
4238         (__size_to_integer(__float128)): Cast return type explicitly.
4239         * include/bits/stl_uninitialized.h (__uninitialized_default_1<true>):
4240         Remove unused typedef.
4241
4242 2020-06-19  Jonathan Wakely  <jwakely@redhat.com>
4243
4244         * include/bits/stl_pair.h (_Index_tuple): Remove redundant
4245         namespace qualification.
4246         (pair::pair(tuple<>&, tuple<>&, _Index_tuple, _Index_tuple)):
4247         Likewise.
4248         * include/std/tuple (_Head_base, _Tuple_impl, tuple_size)
4249         (tuple_element, __get_helper, get, __make_tuple_impl)
4250         (__make_1st_indices, __tuple_concater)
4251         (pair::pair(tuple<>&, tuple<>&, _Index_tuple, _Index_tuple)):
4252         Likewise.
4253         * include/std/utility (tuple_element, __is_tuple_like_impl)
4254         (tuple_size, __pair_get, get): Likewise.
4255
4256 2020-06-19  Jonathan Wakely  <jwakely@redhat.com>
4257
4258         * include/bits/std_function.h (function): Define all member
4259         functions inline.
4260
4261 2020-06-19  Marc Glisse  <marc.glisse@inria.fr>
4262
4263         * include/bits/stl_algo.h (__includes): Simplify the code.
4264
4265 2020-06-19  Marc Glisse  <marc.glisse@inria.fr>
4266
4267         * include/std/optional (optional()): Explicitly define it.
4268
4269 2020-06-17  Jonathan Wakely  <jwakely@redhat.com>
4270
4271         PR libstdc++/94540
4272         * include/bits/stl_uninitialized.h (__uninitialized_default_1<true>):
4273         Construct the first value at *__first instead of on the stack.
4274         (__uninitialized_default_n_1<true>): Likewise.
4275         Improve comments on several of the non-standard algorithms.
4276         * testsuite/20_util/specialized_algorithms/uninitialized_default/94540.cc:
4277         New test.
4278         * testsuite/20_util/specialized_algorithms/uninitialized_default_n/94540.cc:
4279         New test.
4280         * testsuite/20_util/specialized_algorithms/uninitialized_value_construct/94540.cc:
4281         New test.
4282         * testsuite/20_util/specialized_algorithms/uninitialized_value_construct_n/94540.cc:
4283         New test.
4284         * testsuite/23_containers/vector/cons/94540.cc: New test.
4285
4286 2020-06-17  Jonathan Wakely  <jwakely@redhat.com>
4287
4288         * testsuite/20_util/specialized_algorithms/uninitialized_default_n/sizes.cc:
4289         Replace Value type with int so trivial code path is used.
4290         * testsuite/20_util/specialized_algorithms/uninitialized_value_construct_n/sizes.cc:
4291         Likewise.
4292
4293 2020-06-17  Jonathan Wakely  <jwakely@redhat.com>
4294
4295         * include/bits/stl_uninitialized.h (uninitialized_fill_n): Only
4296         use std::fill_n when the size is an integral type.
4297         (__uninitialized_default_n): Likewise.
4298         * testsuite/20_util/specialized_algorithms/uninitialized_default_n/sizes.cc:
4299         New test.
4300         * testsuite/20_util/specialized_algorithms/uninitialized_fill_n/sizes.cc:
4301         New test.
4302         * testsuite/20_util/specialized_algorithms/uninitialized_value_construct_n/sizes.cc:
4303         New test.
4304
4305 2020-06-16  Jonathan Wakely  <jwakely@redhat.com>
4306
4307         PR libstdc++/95282
4308         * include/bits/atomic_base.h (__atomic_impl::load): Use the _Val
4309         alias instead of deducing _Tp as an unqualified type.
4310         (__atomic_impl::exchange): Use the _Val alias to remove volatile
4311         from the reinterpret_cast result type.
4312
4313 2020-06-16  Jonathan Wakely  <jwakely@redhat.com>
4314
4315         * include/std/atomic (atomic): Add static assertions.
4316         * testsuite/29_atomics/atomic/requirements/types_neg.cc: New test.
4317
4318 2020-06-16  Patrick Palka  <ppalka@redhat.com>
4319
4320         PR libstdc++/94003
4321         * testsuite/20_util/is_constructible/94003.cc: New test.
4322
4323 2020-06-15  Jonathan Wakely  <jwakely@redhat.com>
4324
4325         * include/bits/char_traits.h (__cpp_lib_constexpr_char_traits):
4326         Update value for C++20.
4327         * include/std/version (__cpp_lib_constexpr_char_traits): Likewise.
4328         * testsuite/21_strings/char_traits/requirements/constexpr_functions_c++17.cc:
4329         Update expected value.
4330         * testsuite/21_strings/char_traits/requirements/constexpr_functions_c++20.cc:
4331         Likewise.
4332
4333 2020-06-15  Paul Keir  <paul.keir@uws.ac.uk>
4334
4335         * include/bits/char_traits.h (char_traits::move): constexpr move with
4336         overlap was using copy_backward incorrectly.
4337         * testsuite/21_strings/char_traits/requirements/constexpr_functions_c++20.cc:
4338         New test.
4339
4340 2020-06-12  Jonathan Wakely  <jwakely@redhat.com>
4341
4342         * testsuite/29_atomics/atomic_flag/clear/1.cc: Also test clear()
4343         when the value is currently set.
4344         * testsuite/29_atomics/atomic_flag/test_and_set/explicit.cc:
4345         Actually check the return value.
4346         * testsuite/29_atomics/atomic_flag/test_and_set/implicit.cc:
4347         Likewise.
4348
4349 2020-06-12  Jonathan Wakely  <jwakely@redhat.com>
4350
4351         * include/bits/atomic_base.h (atomic_flag::test): Add missing
4352         const qualifiers.
4353         * testsuite/29_atomics/atomic_flag/test/explicit.cc: Add
4354         dg-options and verify results of test function.
4355         * testsuite/29_atomics/atomic_flag/test/implicit.cc: Likewise.
4356
4357 2020-06-11  Jonathan Wakely  <jwakely@redhat.com>
4358
4359         PR libstdc++/94749
4360         * include/bits/istream.tcc (basic_istream::ignore(streamsize, CharT)):
4361         Only discard an extra character if we didn't already reach the
4362         maximum number.
4363         * src/c++98/istream.cc (istream::ignore(streamsiz, char))
4364         (wistream::ignore(streamsize, wchar_t)): Likewise.
4365         * testsuite/27_io/basic_istream/ignore/char/94749.cc: New test.
4366         * testsuite/27_io/basic_istream/ignore/wchar_t/94749.cc: New test.
4367
4368 2020-06-10  Patrick Palka  <ppalka@redhat.com>
4369
4370         PR libstdc++/95578
4371         * include/bits/ranges_algo.h (__lexicographical_compare_fn):
4372         Also check that the iterator and sentinel have the same type before
4373         applying the unwrapping optimization for __normal_iterator.
4374         Split the check into two, one for the first iterator/sentinel
4375         pair and another for second iterator/sentinel pair.  Remove uses
4376         of __niter_base, and remove uses of std::move on a
4377         __normal_iterator.
4378         * include/bits/ranges_algobase.h (__equal_fn): Likewise.
4379         (__copy_or_move): Likewise.  Perform similar adjustments for
4380         the reverse_iterator and move_iterator optimizations.  Inline
4381         the checks into the if-constexprs, and use using-declarations to
4382         make them less visually noisy.  Remove uses of __niter_wrap.
4383         (__copy_or_move_backward): Likewise.
4384         * testsuite/25_algorithms/copy/95578.cc: New test.
4385         * testsuite/25_algorithms/copy_backward/95578.cc: New test.
4386         * testsuite/25_algorithms/equal/95578.cc: New test.
4387         * testsuite/25_algorithms/lexicographical_compare/95578.cc: New test.
4388         * testsuite/25_algorithms/move/95578.cc: New test.
4389         * testsuite/25_algorithms/move_backward/95578.cc: New test.
4390
4391 2020-06-10  François Dumont  <fdumont@gcc.gnu.org>
4392             Jonathan Wakely  <jwakely@redhat.com>
4393
4394         * include/bits/deque.tcc (__lex_cmp_dit): New.
4395         (__lexicographical_compare_aux1): Define overloads for deque
4396         iterators.
4397         * include/bits/stl_algobase.h (__lexicographical_compare::__3way):
4398         New static member function.
4399         (__lexicographical_compare<true>::__3way): Likewise.
4400         (__lexicographical_compare<true>::__lc): Use __3way.
4401         (__lexicographical_compare_aux): Rename to
4402         __lexicographical_compare_aux1 and declare overloads for deque
4403         iterators.
4404         (__lexicographical_compare_aux): Define new forwarding function
4405         that calls __lexicographical_compare_aux1 and declare new overloads
4406         for safe iterators.
4407         (lexicographical_compare): Do not use __niter_base on
4408         parameters.
4409         * include/debug/safe_iterator.tcc
4410         (__lexicographical_compare_aux): Define overloads for safe
4411         iterators.
4412         * testsuite/25_algorithms/lexicographical_compare/1.cc: Add
4413         checks with random access iterators.
4414         * testsuite/25_algorithms/lexicographical_compare/deque_iterators/1.cc:
4415         New test.
4416
4417 2020-06-09  Jonathan Wakely  <jwakely@redhat.com>
4418
4419         * include/bits/stl_iterator.h (move_iterator::operator=): Define.
4420         * testsuite/24_iterators/move_iterator/dr3265.cc: New test.
4421
4422 2020-06-09  Jonathan Wakely  <jwakely@redhat.com>
4423
4424         * include/std/optional (bad_optional_access): Define default
4425         constructor and destructor as defaulted.
4426         * testsuite/20_util/optional/bad_access.cc: New test.
4427
4428 2020-06-08  Jonathan Wakely  <jwakely@redhat.com>
4429
4430         * testsuite/20_util/default_delete/48631_neg.cc: Adjust dg-error
4431         line number.
4432         * testsuite/20_util/default_delete/void_neg.cc: Likewise.
4433
4434 2020-06-08  Jonathan Wakely  <jwakely@redhat.com>
4435
4436         * include/bits/unique_ptr.h (operator<<): Define for C++20.
4437         * testsuite/20_util/unique_ptr/io/lwg2948.cc: New test.
4438
4439 2020-06-04  Jonathan Wakely  <jwakely@redhat.com>
4440
4441         * include/bits/iterator_concepts.h (__detail::__ptr, __detail::__ref)
4442         (__detail::__cat, __detail::__diff): Move to class scope in the
4443         relevant __iterator_traits specializations.
4444         (__iterator_traits<>): Use nested class templates instead of ones from
4445         namespace __detail.
4446         * include/bits/stl_iterator.h (__detail::__common_iter_ptr): Move to
4447         class scope in iterator_traits<common_iterator<I, S>>.
4448         (iterator_traits<common_iterator<I, S>>): Use nested class template
4449         instead of __detail::__common_iter_ptr.
4450
4451 2020-06-04  François Dumont  <fdumont@gcc.gnu.org>
4452
4453         * include/bits/stl_algo.h (__copy_n_a): Move to ...
4454         * include/bits/stl_algobase.h (__copy_n_a): ...here. Add __strict
4455         parameter.
4456         (__copy_n_a(istreambuf_iterator<>, _Size, _Deque_iterator<>, bool)):
4457         Declare.
4458         (__niter_base(const _Safe_iterator<_Ite, _Seq,
4459         random_access_iterator_tag>&)): Declare.
4460         (__copy_move_a2(istreambuf_iterator<>, istreambuf_iterator<>,
4461         _Deque_iterator<>)): Declare.
4462         * include/bits/deque.tcc
4463         (__copy_move_a2(istreambuf_iterator<>, istreambuf_iterator<>,
4464         _Deque_iterator<>)): New.
4465         (__copy_n_a(istreambuf_iterator<>, _Size, _Deque_iterator<>, bool)):
4466         New.
4467         * include/bits/streambuf_iterator.h
4468         (__copy_n_a(istreambuf_iterator<>, _Size, _CharT*, bool)): Adapt.
4469         * include/debug/safe_iterator.tcc (__niter_base): New.
4470         * testsuite/25_algorithms/copy/streambuf_iterators/char/4.cc
4471         (test03): New.
4472         * testsuite/25_algorithms/copy/streambuf_iterators/char/debug/deque_neg.cc:
4473         New test.
4474         * testsuite/25_algorithms/copy_n/debug/istreambuf_ite_deque_neg.cc:
4475         New test.
4476         * testsuite/25_algorithms/copy_n/istreambuf_iterator/2.cc: New test.
4477         * testsuite/25_algorithms/copy_n/istreambuf_iterator/deque.cc:
4478         New test.
4479
4480 2020-06-04  Jonathan Wakely  <jwakely@redhat.com>
4481
4482         * include/bits/ranges_algobase.h (__copy_n_fn): Only call
4483         ranges::copy for positive values.
4484         * include/bits/stl_algo.h (copy_n): Convert Size argument to an
4485         integral type and only call __copy_n for positive values.
4486         * testsuite/util/testsuite_iterators.h
4487         (random_access_iterator_wrapper::operator+=): Fix range check for
4488         negative values.
4489         (output_container, input_container, forward_container)
4490         (bidirectional_container, random_access_container): New alias
4491         templates.
4492         * testsuite/25_algorithms/copy_n/5.cc: New test.
4493
4494 2020-06-02  Jonathan Wakely  <jwakely@redhat.com>
4495
4496         PR libstdc++/90102
4497         * include/debug/deque (deque(const _Base&)): Replace parameter
4498         with a struct that wraps a const _Base&.
4499         * include/debug/forward_list (forward_list(_Base_ref)): New
4500         constructor.
4501         * include/debug/list (list(const _Base&)): Replace parameter
4502         with a struct that wraps a const _Base&.
4503         * include/debug/map.h (map(const _Base&)): Likewise.
4504         * include/debug/multimap.h (multimap(const _Base&)): Likewise.
4505         * include/debug/multiset.h (multiset(const _Base&)): Likewise.
4506         * include/debug/set.h (set(const _Base&)): Likewise.
4507         * include/debug/unordered_map (unordered_map(const _Base&))
4508         (unordered_multimap(const _Base&)): Likewise.
4509         * include/debug/unordered_set (unordered_set(const _Base&))
4510         (unordered_multiset(const _Base&)): Likewise.
4511         * testsuite/23_containers/vector/cons/destructible_debug_neg.cc:
4512         Adjust dg-error line number.
4513         * include/debug/vector (vector(const _Base&)): Likewise.
4514         * testsuite/23_containers/deque/debug/90102.cc: New test.
4515         * testsuite/23_containers/forward_list/debug/90102.cc: New test.
4516         * testsuite/23_containers/list/debug/90102.cc: New test.
4517         * testsuite/23_containers/map/debug/90102.cc: New test.
4518         * testsuite/23_containers/multimap/debug/90102.cc: New test.
4519         * testsuite/23_containers/multiset/debug/90102.cc: New test.
4520         * testsuite/23_containers/set/debug/90102.cc: New test.
4521         * testsuite/23_containers/unordered_map/debug/90102.cc: New test.
4522         * testsuite/23_containers/unordered_multimap/debug/90102.cc: New test.
4523         * testsuite/23_containers/unordered_multiset/debug/90102.cc: New test.
4524         * testsuite/23_containers/unordered_set/debug/90102.cc: New test.
4525         * testsuite/23_containers/vector/debug/90102.cc: New test.
4526
4527 2020-06-01  Jonathan Wakely  <jwakely@redhat.com>
4528
4529         PR libstdc++/95392
4530         * include/bits/fs_path.h (path::_S_to_string): Move to
4531         namespace-scope and rename to ...
4532         (__detail::__string_from_range): ... this.
4533         [WINDOWS] (__detail::__wstr_from_utf8): New function template to
4534         convert a char sequence containing UTF-8 to wstring.
4535         (path::_S_convert(Iter, Iter)): Adjust call to _S_to_string.
4536         (path::_S_convert_loc(Iter, Iter, const locale&)): Likewise.
4537         (u8path(InputIterator, InputIterator)) [WINDOWS]: Use
4538         __string_from_range to obtain a contiguous range and
4539         __wstr_from_utf8 to obtain a wide string.
4540         (u8path(const Source&)) [WINDOWS]: Use __effective_range to
4541         obtain a contiguous range and __wstr_from_utf8 to obtain a wide
4542         string.
4543         (path::_S_convert(const _EcharT*, const _EcharT)) [WINDOWS]:
4544         Use __wstr_from_utf8.
4545
4546 2020-06-01  Jonathan Wakely  <jwakely@redhat.com>
4547
4548         * testsuite/util/testsuite_iterators.h:
4549         (input_iterator_wrapper::operator++(int)): Return proxy object.
4550
4551 2020-06-01  Jonathan Wakely  <jwakely@redhat.com>
4552
4553         * doc/xml/manual/evolution.xml: Document deprecation of
4554         __is_nullptr_t and removal of std::allocator members.
4555         * doc/html/manual/api.html: Regenerate.
4556
4557 2020-06-01  Jonathan Wakely  <jwakely@redhat.com>
4558
4559         * doc/xml/manual/containers.xml: Replace <xref> with <link>.
4560         * doc/xml/manual/evolution.xml: Likewise.
4561         * doc/html/manual/api.html: Regenerate.
4562         * doc/html/manual/containers.html: Regenerate.
4563
4564 2020-06-01  Gerald Pfeifer  <gerald@pfeifer.com>
4565
4566         * doc/xml/faq.xml: Adjust Valgrind reference and remove another.
4567         * doc/html/faq.html: Regenerate.
4568
4569 2020-06-01  Gerald Pfeifer  <gerald@pfeifer.com>
4570
4571         * doc/xml/manual/policy_data_structures_biblio.xml: Remove
4572         stray change.
4573
4574 2020-06-01  Gerald Pfeifer  <gerald@pfeifer.com>
4575
4576         * doc/xml/manual/policy_data_structures_biblio.xml: Switch
4577         www.cs.princeton.edu to https.
4578         * doc/html/manual/policy_data_structures.html: Regenerate.
4579
4580 2020-05-31  Douglas B Rupp  <douglas.b.rupp@gmail.com>
4581
4582         * crossconfig.m4 (<*-vxworks>): Check for more math decls.
4583         * configure: Rebuild.
4584
4585 2020-05-29  H.J. Lu  <hjl.tools@gmail.com>
4586
4587         PR bootstrap/95413
4588         * configure: Regenerated.
4589
4590 2020-05-29  François Dumont  <fdumont@gcc.gnu.org>
4591
4592         PR libstdc++/95079
4593         * include/bits/hashtable_policy.h (_Insert_base<>::try_emplace): New.
4594         * include/bits/unordered_map.h (unordered_map<>::try_emplace): Adapt.
4595         (unordered_map<>::insert_or_assign): Adapt.
4596
4597 2020-05-27  Jonathan Wakely  <jwakely@redhat.com>
4598
4599         PR libstdc++/95282
4600         * include/bits/atomic_base.h (__atomic_impl::load): Add
4601         cv-qualifiers to parameter so that _Tp is deduced as the
4602         unqualified type.
4603         * testsuite/29_atomics/atomic_float/95282.cc: New test.
4604
4605 2020-05-27  Jonathan Wakely  <jwakely@redhat.com>
4606
4607         PR libstdc++/95322
4608         * include/std/ranges (transform_view::_Sentinel): Allow hidden
4609         friends to work with _Iterator<true> and _Iterator<false>.
4610         (join_view::_Sentinel): Likewise.
4611         * testsuite/std/ranges/adaptors/95322.cc: New test.
4612
4613 2020-05-27  Jonathan Wakely  <jwakely@redhat.com>
4614
4615         PR libstdc++/94354
4616         * include/bits/stl_iterator.h (reverse_iterator): Fix comparison
4617         operators to use the correct operations on the underlying
4618         iterators.
4619         * testsuite/24_iterators/reverse_iterator/rel_ops.cc: New test.
4620
4621 2020-05-27  Jonathan Wakely  <jwakely@redhat.com>
4622
4623         * testsuite/18_support/comparisons/categories/zero_neg.cc: New test.
4624
4625 2020-05-26  Patrick Palka  <ppalka@redhat.com>
4626
4627         PR libstdc++/95322
4628         * include/bits/stl_iterator.h (__detail::_Common_iter_proxy):
4629         Remove and instead define it ...
4630         (common_iterator::_Proxy): ... here.
4631         (common_iterator::operator->): Use it.
4632         * testsuite/24_iterators/common_iterator/2.cc: New test.
4633         * testsuite/std/ranges/adaptors/95322.cc: New test.
4634
4635 2020-05-23  Patrick Palka  <ppalka@redhat.com>
4636
4637         PR libstdc++/93978
4638         * testsuite/std/ranges/adaptors/93978.cc: Add -Wall to
4639         dg-additional-options.  Avoid unused-but-set-variable warning.
4640
4641 2020-05-23  Jonathan Wakely  <jwakely@redhat.com>
4642
4643         PR libstdc++/95289
4644         * include/debug/helper_functions.h (__get_distance): Only declare
4645         as a constexpr function for C++14 and up.
4646         * testsuite/25_algorithms/copy/debug/95289.cc: New test.
4647
4648         * include/bits/fs_path.h (__detail::_S_range_begin)
4649         (__detail::_S_range_end, path::_S_string_from_iter): Replace with
4650         overloaded function template __detail::__effective_range.
4651         (__detail::__effective_range): New overloaded function template to
4652         create a basic_string or basic_string_view for an effective range.
4653         (__detail::__value_type_is_char): Use __detail::__effective_range.
4654         Do not use remove_const on value type.
4655         (__detail::__value_type_is_char_or_char8_t): Likewise.
4656         (path::path(const Source&, format))
4657         (path::path(const Source&, const locale&))
4658         (path::operator/=(const Source&), path::append(const Source&))
4659         (path::concat(const Source&)): Use __detail::__effective_range.
4660         (path::_S_to_string(InputIterator, InputIterator)): New function
4661         template to create a string view if possible, or string otherwise.
4662         (path::_S_convert): Add overloads that convert a string returned
4663         by __detail::__effective_range. Use if-constexpr to inline conversion
4664         logic from all overloads of _Cvt::_S_convert.
4665         (path::_S_convert_loc): Add overload that converts a string. Use
4666         _S_to_string to avoid allocation when possible.
4667         (path::_Cvt): Remove.
4668         (path::operator+=(CharT)): Remove indirection through path::concat.
4669         * include/experimental/bits/fs_path.h (path::_S_convert_loc): Add
4670         overload for non-const pointers, to avoid constructing a std::string.
4671         * src/c++17/fs_path.cc (path::_S_convert_loc): Replace conditional
4672         compilation with call to _S_convert.
4673
4674         * include/bits/fs_path.h (__detail::_S_range_begin)
4675         (__detail::_S_range_end): Remove unintentional static specifiers.
4676         * include/experimental/bits/fs_path.h (__detail::_S_range_begin)
4677         (__detail::_S_range_end): Likewise.
4678
4679         * include/bits/fs_path.h (filesystem::__detail::__is_encoded_char):
4680         Replace alias template with variable template. Don't remove const.
4681         (filesystem::__detail::__is_path_src): Replace overloaded function
4682         template with variable template and specializations.
4683         (filesystem::__detail::__is_path_iter_src): Replace alias template
4684         with class template.
4685         (filesystem::__detail::_Path): Use __is_path_src. Remove support for
4686         iterator pairs.
4687         (filesystem::__detail::_Path2): New alias template for checking
4688         InputIterator requirements.
4689         (filesystem::__detail::__constructible_from): Remove.
4690         (filesystem::path): Replace _Path<Iter, Iter> with _Path2<Iter>.
4691         * testsuite/27_io/filesystem/path/construct/80762.cc: Check with two
4692         constructor arguments of void and void* types.
4693
4694 2020-05-21  Matthias Kretz  <kretz@kde.org>
4695
4696         * testsuite/Makefile.am: Remove dup target_triplet and set tool,
4697         allowing runtest to work without arguments.
4698         * testsuite/Makefile.in: Regenerate.
4699
4700 2020-05-21  Jonathan Wakely  <jwakely@redhat.com>
4701
4702         PR libstdc++/93983
4703         * include/bits/iterator_concepts.h (__detail::__cpp17_iterator):
4704         Reorder constraints to avoid recursion when constructors use
4705         iterator_traits (LWG 3420).
4706         * testsuite/24_iterators/customization_points/lwg3420.cc: New test.
4707
4708         * include/experimental/socket (basic_socket::is_open()
4709         (basic_socket_acceptor::is_open()): Use _GLIBCXX_NODISCARD macro.
4710
4711         * include/experimental/bits/net.h (__endpoint, __protocol)
4712         (__acceptable_protocol, __inet_protocol): New concepts.
4713         (__detail::__is_endpoint): Move trait from <experimental/socket>.
4714         (__is_protocol, __is_acceptable_protocol, __is_inet_protocol): New
4715         traits.
4716         (__endpoint, __protocol, __acceptable_protocol): New variable
4717         templates.
4718         * include/experimental/socket (__is_endpoint): Move to net.h header.
4719         (basic_socket, basic_socket_acceptor): Check requirements.
4720
4721         * include/experimental/executor (use_future_t::use_future_t()): Fix
4722         incorrect noexcept-specifier.
4723         * include/experimental/internet (basic_resolver_results): Adjust
4724         whitespace.
4725         * include/experimental/socket (__basic_socket_impl::release): Add
4726         member function.
4727         (basic_socket(io_context&, const endpoint_type&)): Fix argument to
4728         target constructor.
4729         (basic_socket::release(), basic_socket::release(error_code&)): Add
4730         missing member functions.
4731         (basic_socket::is_open()): Add nodiscard attribute.
4732         (basic_socket::close(error_code&)): Pass argument to base function.
4733         (basic_socket_acceptor::release())
4734         (basic_socket_acceptor::release(error_code&)): Add missing member
4735         functions.
4736         (basic_socket_acceptor::is_open()): Add nodiscard attribute.
4737         (basic_socket_streambuf::error()): Add noexcept.
4738         (basic_socket_iostream::error()): Likewise.
4739         * testsuite/experimental/net/socket/basic_socket.cc: New test.
4740
4741         * include/experimental/buffer: Replace typedefs with
4742         alias-declarations.
4743         * include/experimental/executor: Likewise.
4744         * include/experimental/internet: Likewise.
4745         * include/experimental/socket: Likewise.
4746         * include/experimental/timer: Likewise.
4747
4748 2020-05-19  Jonathan Wakely  <jwakely@redhat.com>
4749
4750         PR libstdc++/94087
4751         * src/c++11/random.cc (__x86_rdseed): Allow fallback function to be
4752         passed in.
4753         (__x86_rdseed_rdrand): New function that uses rdseed with rdrand
4754         fallback.
4755         (random_device::_M_init): Use __x86_rdseed_rdrand when both
4756         instructions are available.
4757         * testsuite/26_numerics/random/random_device/94087.cc: New test.
4758
4759 2020-05-19  Patrick Palka  <ppalka@redhat.com>
4760
4761         PR c++/66439
4762         * testsuite/20_util/pair/astuple/get_neg.cc: Prune "type/value
4763         mismatch" messages.
4764         * testsuite/20_util/tuple/element_access/get_neg.cc: Likewise.
4765
4766 2020-05-15  H.J. Lu  <hongjiu.lu@intel.com>
4767
4768         PR bootstrap/95147
4769         * configure: Regenerated.
4770
4771 2020-05-14  H.J. Lu  <hongjiu.lu@intel.com>
4772
4773         * configure: Regenerated.
4774
4775 2020-05-13  Alexandre Oliva <oliva@adacore.com>
4776
4777         PR libstdc++/77691
4778         * include/experimental/memory_resource
4779         (__resource_adaptor_imp::do_allocate): Handle max_align_t on
4780         x86-vxworks as on x86-solaris.
4781         (__resource_adaptor_imp::do_deallocate): Likewise.
4782         * testsuite/experimental/memory_resource/new_delete_resource.cc:
4783         Drop xfail.
4784         (BAD_MAX_ALIGN_T): Define on x86-vxworks as on x86-solaris.
4785         (test03): Drop max-align test for char-aligned alloc.
4786
4787 2020-05-08  Ulrich Drepper  <drepper@redhat.com>
4788
4789         * include/bits/atomic_base.h (atomic_flag): Implement test member
4790         function.
4791         * include/std/version: Define __cpp_lib_atomic_flag_test.
4792         * testsuite/29_atomics/atomic_flag/test/explicit.cc: New file.
4793         * testsuite/29_atomics/atomic_flag/test/implicit.cc: New file.
4794
4795 2020-05-07  Jonathan Wakely  <jwakely@redhat.com>
4796
4797         PR libstdc++/94971 (partial)
4798         * include/bits/ranges_algo.h (ranges::__sample_fn): Qualify
4799         std::sample using macro to work in parallel mode.
4800         (__sort_fn): Likewise for std::sort.
4801         (ranges::__nth_element_fn): Likewise for std::nth_element.
4802         * include/bits/stl_algobase.h (lexicographical_compare_three_way):
4803         Likewise for std::__min_cmp.
4804         * include/parallel/algobase.h (lexicographical_compare_three_way):
4805         Add to namespace std::__parallel.
4806
4807         PR c/92472
4808         * include/parallel/multiway_merge.h (_GuardedIterator::operator*)
4809         (_GuardedIterator::operator _RAIter, _UnguardedIterator::operator*)
4810         (_UnguardedIterator::operator _RAIter): Add const qualifier.
4811         (operator<(_GuardedIterator&, _GuardedIterator&)
4812         (operator<=(_GuardedIterator&, _GuardedIterator&)
4813         (operator<(_UnguardedIterator&, _UnguardedIterator&)
4814         (operator<=(_UnguardedIterator&, _UnguardedIterator&): Change
4815         parameters to const references.
4816
4817 2020-05-07  Eric Botcazou  <ebotcazou@adacore.com>
4818
4819         * config/abi/post/sparc64-linux-gnu/baseline_symbols.txt: Update.
4820         * config/abi/post/sparc64-linux-gnu/32/baseline_symbols.txt: Likewise.
4821
4822 2020-05-06  François Dumont  <fdumont@gcc.gnu.org>
4823
4824         * include/bits/stl_algobase.h (struct _Bit_iterator): New declaration.
4825         (std::__fill_a1(_Bit_iterator, _Bit_iterator, const bool&)): Likewise.
4826         * include/bits/stl_bvector.h (__fill_bvector): Move outside
4827         _GLIBCXX_STD_C namespace.
4828         (fill(_Bit_iterator, _Bit_iterator, const bool&)): Likewise and rename
4829         into...
4830         (__fill_a1): ...this.
4831         * testsuite/25_algorithms/fill/bvector/1.cc: New.
4832
4833 2020-05-06  H.J. Lu  <hongjiu.lu@intel.com>
4834
4835         * config/abi/post/x86_64-linux-gnu/x32/baseline_symbols.txt: Updated.
4836
4837 2020-05-06  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
4838
4839         * config/abi/post/i386-solaris/baseline_symbols.txt: Regenerate.
4840         * config/abi/post/i386-solaris/amd64/baseline_symbols.txt:
4841         Likewise.
4842         * config/abi/post/sparc-solaris/baseline_symbols.txt: Likewise.
4843         * config/abi/post/sparc-solaris/sparcv9/baseline_symbols.txt:
4844         Likewise.
4845
4846 2020-05-06  Martin Liska  <mliska@suse.cz>
4847
4848         Revert:
4849         2020-05-05  Martin Liska  <mliska@suse.cz>
4850         PR c/92472
4851         * include/parallel/multiway_merge.h:
4852         Use const for _Compare template argument.
4853
4854 2020-05-06  Jonathan Wakely  <jwakely@redhat.com>
4855
4856         * doc/xml/manual/abi.xml (abi.versioning.history): Document library
4857         versions for GCC 9.[123] and 10.1 releases.
4858         * doc/html/*: Regenerate.
4859
4860 2020-05-06  Jakub Jelinek  <jakub@redhat.com>
4861
4862         * config/abi/post/x86_64-linux-gnu/baseline_symbols.txt: Update.
4863         * config/abi/post/x86_64-linux-gnu/32/baseline_symbols.txt: Update.
4864         * config/abi/post/i386-linux-gnu/baseline_symbols.txt: Update.
4865         * config/abi/post/i486-linux-gnu/baseline_symbols.txt: Update.
4866         * config/abi/post/aarch64-linux-gnu/baseline_symbols.txt: Update.
4867         * config/abi/post/s390x-linux-gnu/baseline_symbols.txt: Update.
4868         * config/abi/post/powerpc64-linux-gnu/baseline_symbols.txt: Update.
4869
4870 2020-05-05  Martin Liska  <mliska@suse.cz>
4871
4872         PR c/92472
4873         * include/parallel/multiway_merge.h:
4874         Use const for _Compare template argument.
4875
4876 2020-05-04  Fangrui Song  <maskray@google.com>
4877
4878         * libsupc++/cxxabi.h (__cxa_finalize): Fix return type.
4879
4880 2020-05-04  Jonathan Wakely  <jwakely@redhat.com>
4881
4882         * doc/xml/faq.xml: Use working link for SGI STL FAQ.
4883         * doc/html/*: Regenerate.
4884
4885         PR libstdc++/94906
4886         * src/c++17/memory_resource.cc
4887         (monotonic_buffer_resource::_Chunk::release): Use size_t for shift
4888         operands.
4889
4890 2020-05-04  Nathan Sidwell  <nathan@acm.org>
4891
4892         PR libstdc++/94747
4893         * libsupc++/dyncast.cc (__dynamic_cast): Cast offsetof to
4894         ptrdiff_t before negation, to show intent more clearly.
4895
4896 2020-05-04  Jonathan Wakely  <jwakely@redhat.com>
4897
4898         PR libstdc++/94936
4899         * src/c++17/memory_resource.cc (synchronized_pool_resource::_TPools):
4900         Add comment about single-threaded behaviour.
4901         (synchronized_pool_resource::_TPools::move_nonempty_chunks()): Hoist
4902         class member access out of loop.
4903         (synchronized_pool_resource::synchronized_pool_resource())
4904         (synchronized_pool_resource::~synchronized_pool_resource())
4905         (synchronized_pool_resource::release()): Check __gthread_active_p
4906         before creating and/or deleting the thread-specific data key.
4907         (synchronized_pool_resource::_M_thread_specific_pools()): Adjust
4908         assertions.
4909         (synchronized_pool_resource::do_allocate(size_t, size_t)): Add fast
4910         path for single-threaded case.
4911         (synchronized_pool_resource::do_deallocate(void*, size_t, size_t)):
4912         Likewise. Return if unable to find a pool that owns the allocation.
4913         * testsuite/20_util/synchronized_pool_resource/allocate_single.cc:
4914         New test.
4915         * testsuite/20_util/synchronized_pool_resource/cons_single.cc: New
4916         test.
4917         * testsuite/20_util/synchronized_pool_resource/release_single.cc: New
4918         test.
4919
4920 2020-05-03  Jonathan Wakely  <jwakely@redhat.com>
4921
4922         PR libstdc++/94933
4923         * include/bits/stl_algobase.h (__fill_a1): Make overload for byte types
4924         usable in constant expressions.
4925         * testsuite/25_algorithms/fill_n/constexpr.cc: Test with bytes and
4926         non-scalars.
4927
4928 2020-05-01  Jonathan Wakely  <jwakely@redhat.com>
4929
4930         PR libstdc++/94901
4931         * testsuite/17_intro/badnames.cc: Test values between _E9 and _E24 too.
4932
4933 2020-05-01  Jonathan Wakely  <jwakely@redhat.com>
4934             Patrick Palka  <ppalka@redhat.com>
4935
4936         PR libstdc++/92894
4937         * include/bits/iterator_concepts.h (ranges::__cust_imove::_IMove):
4938         Add trait to determine return type and an alias for it.
4939         (ranges::__cust_imove::_IMove::operator()): Use __result instead of
4940         deduced return type.
4941         (iter_rvalue_reference_t): Use _IMove::__type instead of checking
4942         the result of ranges::iter_move.
4943         (__detail::__indirectly_readable_impl): Use iter_rvalue_reference_t
4944         instead of checking the result of ranges::iter_move.
4945         * testsuite/24_iterators/customization_points/92894.cc: New test.
4946         * testsuite/24_iterators/indirect_callable/92894.cc: New test.
4947
4948 2020-05-01  Jonathan Wakely  <jwakely@redhat.com>
4949
4950         PR libstdc++/94901
4951         * include/std/type_traits (__is_complete_or_unbounded): Replace
4952         BADNAME _T with _Tp.
4953         * testsuite/17_intro/badnames.cc: New test.
4954
4955 2020-04-30  Jonathan Wakely  <jwakely@redhat.com>
4956
4957         PR libstdc++/89510
4958         * include/bits/alloc_traits.h (allocator_traits::_S_construct)
4959         (allocator_traits::_S_destroy)
4960         (allocator_traits<allocator<T>>::construct): Use traits in
4961         noexcept-specifiers.
4962         * include/bits/allocator.h (allocator<void>::construct)
4963         (allocator<void>::destroy): Likewise.
4964         * include/ext/malloc_allocator.h (malloc_allocator::construct)
4965         (malloc_allocator::destroy): Likewise.
4966         * include/ext/new_allocator.h (new_allocator::construct)
4967         (new_allocator::destroy): Likewise.
4968         * testsuite/20_util/allocator/89510.cc: New test.
4969         * testsuite/ext/malloc_allocator/89510.cc: New test.
4970         * testsuite/ext/new_allocator/89510.cc: New test.
4971
4972 2020-04-29  Jonathan Wakely  <jwakely@redhat.com>
4973
4974         PR libstdc++/94854
4975         * include/bits/basic_string.tcc: Update comment about explicit
4976         instantiations.
4977
4978 2020-04-28  Jonathan Wakely  <jwakely@redhat.com>
4979
4980         PR libstdc++/91480
4981         * include/bits/allocator.h (__cpp_lib_allocator_is_always_equal):
4982         Remove non-standard macro.
4983         * include/bits/stl_iterator.h (__cpp_lib_constexpr_iterator): Define
4984         to indicate P1032R1 support.
4985         * include/bits/stl_pair.h (__cpp_lib_constexpr_utility): Likewise.
4986         * include/std/string_view (__cpp_lib_constexpr_string_view): Likewise.
4987         * include/std/tuple (__cpp_lib_constexpr_tuple): Likewise.
4988         * include/std/version (__cpp_lib_allocator_is_always_equal): Remove.
4989         (__cpp_lib_constexpr_iterator, __cpp_lib_constexpr_string_view)
4990         (__cpp_lib_constexpr_tuple, __cpp_lib_constexpr_utility): Define.
4991         * testsuite/20_util/function_objects/constexpr_searcher.cc: Check
4992         feature test macro.
4993         * testsuite/20_util/tuple/cons/constexpr_allocator_arg_t.cc: Likewise.
4994         * testsuite/21_strings/basic_string_view/operations/copy/char/
4995         constexpr.cc: Likewise.
4996         * testsuite/24_iterators/insert_iterator/constexpr.cc: Likewise.
4997
4998         PR libstdc++/94831
4999         * include/bits/alloc_traits.h (_S_construct): Restore placement
5000         new-expression for C++11/14/17 and call std::construct_at directly
5001         for C++20.
5002         * include/bits/stl_construct.h (_Construct): Revert to non-constexpr
5003         function returning void.
5004         * testsuite/20_util/specialized_algorithms/
5005         uninitialized_value_construct/94831.cc: New test.
5006         * testsuite/23_containers/vector/cons/94831.cc: New test.
5007
5008 2020-04-28  Patrick Palka  <ppalka@redhat.com>
5009
5010         LWG 3433 subrange::advance(n) has UB when n < 0
5011         * include/std/ranges (subrange::prev): Fix typo.
5012         (subrange::advance): Handle a negative argument as per the proposed
5013         resolution of LWG 3433.
5014         * testsuite/std/ranges/subrange/lwg3433.cc: New test.
5015
5016 2020-04-28  Jonathan Wakely  <jwakely@redhat.com>
5017             Iain Sandoe  <iain@sandoe.co.uk>
5018
5019         PR c++/94759
5020         * include/std/coroutine: Implement handing for non-
5021         class coroutine return types.
5022
5023 2020-04-24  Jonathan Wakely  <jwakely@redhat.com>
5024
5025         * include/experimental/executor (service_already_exists): Make default
5026         constructor public (LWG 3414).
5027         * testsuite/experimental/net/execution_context/make_service.cc: Check
5028         the service_already_exists can be default constructed.
5029
5030 2020-04-24  Kamlesh Kumar  <kamleshbhalui@gmail.com>
5031             Jonathan Wakely  <jwakely@redhat.com>
5032
5033         PR libstdc++/90415
5034         PR libstdc++/92156
5035         * include/std/any (any): Rename template parameters for consistency
5036         with the standard.
5037         (any::_Decay): Rename to _Decay_if_not_any.
5038         (any::any(T&&):: Remove is_constructible from constraints. Remove
5039         non-standard overload.
5040         (any::any(in_place_type_t<T>, Args&&...))
5041         (any::any(in_place_type_t<T>, initializer_list<U>, Args&&...))
5042         (any::emplace(Args&&...))
5043         (any::emplace(initializer_list<U>, Args&&...)):
5044         Use decay_t instead of _Decay.
5045         * testsuite/20_util/any/cons/90415.cc: New test.
5046         * testsuite/20_util/any/cons/92156.cc: New Test.
5047         * testsuite/20_util/any/misc/any_cast_neg.cc: Make dg-error directives
5048         more robust.
5049         * testsuite/20_util/any/modifiers/92156.cc: New test.
5050
5051 2020-04-23  Jonathan Wakely  <jwakely@redhat.com>
5052
5053         * doc/xml/manual/status_cxx2020.xml: Update C++20 status table.
5054         * doc/html/*: Regenerate.
5055
5056         * include/bits/stl_iterator.h (__cpp_lib_array_constexpr): Revert
5057         value for C++17 to 201803L because P0858R0 is supported for C++17.
5058         * include/std/version (__cpp_lib_array_constexpr): Likewise.
5059         * testsuite/23_containers/array/element_access/constexpr_c++17.cc:
5060         Check for value corresponding to P0031R0 features being tested.
5061         * testsuite/23_containers/array/requirements/constexpr_iter.cc:
5062         Check for value corresponding to P0858R0 features being tested.
5063
5064         * include/std/version (__cpp_lib_three_way_comparison): Define for
5065         freestanding builds.
5066
5067 2020-04-23  Thomas Rodgers  <rodgert@appliantology.com>
5068
5069         * include/experimental/net/executor (system_context): Mark
5070         system_context::system_context() = delete.
5071         * testsuite/experimental/net/executor/1.cc: Add new
5072         test to check system_context is not default constructible.
5073
5074 2020-04-23  Iain Sandoe  <iain@sandoe.co.uk>
5075
5076         * include/std/coroutine: Update the inline namespace to __n4861.
5077         Add the __cpp_lib_coroutine define, set to 201902L.
5078         * include/std/version: Add __cpp_lib_coroutine, set to 201902L.
5079
5080 2020-04-22  Jonathan Wakely  <jwakely@redhat.com>
5081
5082         * include/std/execution (__cpp_lib_execution): Define to indicate
5083         support for P0024R2 and P1001R2.
5084         * include/std/version (__cpp_lib_execution): Define.
5085         * testsuite/25_algorithms/pstl/feature_test.cc: Only test macro
5086         defined by <algorithm>, move other tests to new tests ...
5087         * testsuite/25_algorithms/pstl/feature_test-2.cc: New test.
5088         * testsuite/25_algorithms/pstl/feature_test-3.cc: New test.
5089         * testsuite/25_algorithms/pstl/feature_test-4.cc: New test.
5090         * testsuite/25_algorithms/pstl/feature_test-5.cc: New test.
5091
5092         * include/bits/stl_iterator.h (__cpp_lib_array_constexpr): Define
5093         different values for C++17 and C++20, to indicate different feature
5094         sets. Update value for C++20 to indicate P1032R1 support.
5095         * include/std/version (__cpp_lib_array_constexpr): Likewise.
5096         * testsuite/23_containers/array/comparison_operators/constexpr.cc:
5097         Check feature test macro.
5098         * testsuite/23_containers/array/element_access/constexpr_c++17.cc:
5099         New test.
5100         * testsuite/23_containers/array/requirements/constexpr_fill.cc: Check
5101         feature test macro.
5102         * testsuite/23_containers/array/requirements/constexpr_iter.cc: Test
5103         in C++17 mode and check feature test macro.
5104
5105         * include/std/utility (__cpp_lib_constexpr_algorithms): Do not define
5106         here.
5107         * testsuite/20_util/exchange/constexpr.cc: Do not expect macro to be
5108         defined by <utility>.
5109
5110         * include/std/functional (__cpp_lib_concepts): Update macro value to
5111         indicate P1964R2 support.
5112         * include/std/version (__cpp_lib_concepts): Likewise.
5113         * testsuite/std/concepts/1.cc: Adjust expected value.
5114         * testsuite/std/concepts/2.cc: Likewise.
5115
5116         * include/std/functional (__cpp_lib_constexpr_invoke): Rename to
5117         __cpp_lib_constexpr_functional.
5118         * include/std/version (__cpp_lib_constexpr_invoke): Likewise.
5119         * testsuite/20_util/function_objects/invoke/constexpr.cc: Adjust.
5120
5121         * include/bits/ptr_traits.h (__cpp_lib_constexpr_memory): Define to
5122         indicate P1006R1 support.
5123         (__cpp_lib_to_address): Define to indicate P0653R2 support.
5124         * include/bits/range_access.h (__cpp_lib_ssize): Define to indicate
5125         P1227R2 support.
5126         * include/bits/ranges_algo.h (__cpp_lib_shift): Define to indicate
5127         P0769R2 support.
5128         * include/std/atomic (__cpp_lib_atomic_float): Define to indicate
5129         P0020R6 support.
5130         * include/std/memory (__cpp_lib_assume_aligned): Define to indicate
5131         P1007R3 support.
5132         * include/std/memory_resource (__cpp_lib_polymorphic_allocator):
5133         Define to indicate P0339R6 support.
5134         * include/std/string_view (__cpp_lib_starts_ends_with): Define to
5135         indicate P0457R2 support.
5136         * include/std/type_traits (__cpp_lib_is_nothrow_convertible): Define
5137         to indicate P0758R1 support.
5138         (__cpp_lib_remove_cvref): Define to indicate P0550R2 support.
5139         (__cpp_lib_type_identity): Define to indicate P0887R1 support.
5140         * include/std/version (__cpp_lib_atomic_float)
5141         (__cpp_lib_is_nothrow_convertible, __cpp_lib_remove_cvref)
5142         (__cpp_lib_type_identity, __cpp_lib_assume_aligned)
5143         (__cpp_lib_constexpr_memory, __cpp_lib_polymorphic_allocator)
5144         (__cpp_lib_shift, __cpp_lib_ssize, __cpp_lib_starts_ends_with)
5145         (__cpp_lib_to_address): Define.
5146         * testsuite/20_util/to_address/1_neg.cc: Adjust dg-error line number.
5147
5148         * include/bits/stl_map.h (__cpp_lib_map_insertion): Remove old
5149         macro.
5150         * include/bits/unordered_map.h (__cpp_lib_unordered_map_insertion):
5151         Likewise.
5152         * include/std/version (__cpp_lib_map_insertion)
5153         (__cpp_lib_unordered_map_insertion): Remove.
5154
5155         * include/std/condition_variable (__cpp_lib_jthread): Remove
5156         redundant definition.
5157         * include/std/stop_token (__cpp_lib_jthread): Update macro value to
5158         indicate P1869R1 support.
5159         * include/std/version (__cpp_lib_jthread): Update value.
5160         * testsuite/30_threads/condition_variable_any/stop_token/1.cc: Check
5161         for updated macro value.
5162         * testsuite/30_threads/condition_variable_any/stop_token/2.cc:
5163         Likewise.
5164         * testsuite/30_threads/jthread/1.cc: Likewise.
5165         * testsuite/30_threads/jthread/2.cc: Likewise.
5166         * testsuite/30_threads/stop_token/1.cc: Likewise.
5167         * testsuite/30_threads/stop_token/2.cc: Likewise.
5168
5169         * testsuite/21_strings/basic_string/erasure.cc: Check for
5170         __cpp_lib_erase_if macro.
5171         * testsuite/23_containers/deque/erasure.cc: Add header name to #error
5172         messages.
5173         * testsuite/23_containers/forward_list/erasure.cc: Likewise.
5174         * testsuite/23_containers/list/erasure.cc: Likewise.
5175         * testsuite/23_containers/map/erasure.cc: Likewise.
5176         * testsuite/23_containers/set/erasure.cc: Likewise.
5177         * testsuite/23_containers/unordered_map/erasure.cc: Likewise.
5178         * testsuite/23_containers/unordered_set/erasure.cc: Likewise.
5179         * testsuite/23_containers/vector/erasure.cc: Likewise.
5180
5181 2020-04-21  Jonathan Wakely  <jwakely@redhat.com>
5182
5183         * include/bits/stl_iterator.h (__normal_iterator): Use synth-three-way
5184         to define operator<=>.
5185         * testsuite/24_iterators/normal_iterator/cmp_c++20.cc: New test.
5186
5187         * doc/Makefile.am (xml_sources_manual): Add missing XML files.
5188         * doc/Makefile.in: Regenerate.
5189         * doc/xml/manual/status_cxx1998.xml: Refer to "this section" instead
5190         of "this page".
5191         * doc/xml/manual/status_cxx2011.xml: Formatting and other corrections
5192         to the C++11 status table.
5193         * doc/xml/manual/status_cxx2014.xml: Replace list of C++14 feature
5194         proposals with table matching contents of the C++14 standard.
5195         * doc/xml/manual/status_cxx2017.xml: Add table matching contents of
5196         the C++17 standard.
5197         * doc/html/*: Regenerate.
5198
5199         PR c++/94149
5200         * include/std/type_traits (__is_nt_constructible_impl): Add partial
5201         specializations for bounded arrays with non-empty initializers.
5202         * testsuite/20_util/is_nothrow_constructible/value_c++20.cc: New test.
5203
5204 2020-04-20  Thomas Rodgers  <trodgers@redhat.com>
5205
5206         * testsuite/lib/libstdc++.exp: Add additional_flags=
5207         -DTBB_SUPRESS_DEPRECATED_MESSAGES=1 to suppress warnings when
5208         compiling with a newer Thread Building Blocks.
5209
5210 2020-04-20  Jonathan Wakely  <jwakely@redhat.com>
5211
5212         * testsuite/24_iterators/istreambuf_iterator/sentinel.cc: New test.
5213
5214         * testsuite/20_util/is_constructible/51185.cc: Make test class a
5215         non-aggregate so that the test verifies the same thing in all -std
5216         modes.
5217         * testsuite/20_util/is_constructible/value-2.cc: Adjust expected
5218         results for some types when paren-init for aggregates is supported.
5219
5220         * include/std/version (__cpp_lib_three_way_comparison): Update value.
5221         * libsupc++/compare (__cpp_lib_three_way_comparison): Likewise.
5222         (__detail::__synth3way): Add noexcept-specifier.
5223
5224         * include/bits/stl_map.h (map): Define operator<=> and remove
5225         operator< for C++20.
5226         * include/bits/stl_multimap.h (multimap): Likewise.
5227         * include/bits/stl_multiset.h (multiset): Likewise.
5228         * include/bits/stl_set.h (set): Likewise.
5229         * include/bits/stl_tree.h (_Rb_tree): Likewise.
5230         (_Rb_tree_iterator, _Rb_tree_const_iterator): Remove redundant
5231         operator!= for C++20.
5232         * include/debug/map.h (__gnu_debug::map): Define operator<=> for C++20.
5233         * include/debug/multimap.h (__gnu_debug::multimap): Likewise.
5234         * include/debug/multiset.h (__gnu_debug::multiset): Likewise.
5235         * include/debug/set.h (__gnu_debug::set): Likewise.
5236         * testsuite/23_containers/map/operators/cmp_c++20.cc: New test.
5237         * testsuite/23_containers/multimap/operators/cmp_c++20.cc: New test.
5238         * testsuite/23_containers/multiset/operators/cmp_c++20.cc: New test.
5239         * testsuite/23_containers/set/operators/cmp_c++20.cc: New test.
5240
5241 2020-04-20  Matthias Kretz  <kretz@kde.org>
5242
5243         * testsuite/lib/libstdc++.exp: Avoid illegal argument to verbose.
5244
5245 2020-04-19  Jonathan Wakely  <jwakely@redhat.com>
5246
5247         * include/bits/stl_queue.h (queue): Define operator<=> for C++20.
5248         * include/bits/stl_stack.h (stack): Likewise.
5249         * testsuite/23_containers/queue/cmp_c++20.cc: New test.
5250         * testsuite/23_containers/stack/cmp_c++20.cc: New test.
5251
5252         * include/bits/unordered_map.h (unordered_map, unordered_multimap):
5253         Remove redundant operator!= for C++20.
5254         * include/bits/unordered_set.h (unordered_set, unordered_multiset):
5255         Likewise.
5256         * include/debug/unordered_map (unordered_map, unordered_multimap):
5257         Likewise.
5258         * include/debug/unordered_set (unordered_set, unordered_multiset):
5259         Likewise.
5260
5261         PR other/94629
5262         * include/debug/formatter.h (_Error_formatter::_Parameter): Fix
5263         redundant assignment in constructor.
5264
5265 2020-04-18  Jonathan Wakely  <jwakely@redhat.com>
5266
5267         * include/std/chrono (duration, time_point): Define operator<=> and
5268         remove redundant operator!= for C++20.
5269         * testsuite/20_util/duration/comparison_operators/three_way.cc: New
5270         test.
5271         * testsuite/20_util/time_point/comparison_operators/three_way.cc: New
5272         test.
5273
5274         * testsuite/util/native_type/native_priority_queue.hpp: Use
5275         allocator_traits to rebind allocator.
5276
5277 2020-04-17  Jonathan Wakely  <jwakely@redhat.com>
5278
5279         * include/bits/forward_list.h (forward_list): Define operator<=> and
5280         remove redundant comparison operators for C++20.
5281         * include/bits/stl_bvector.h (vector<bool, Alloc>): Likewise.
5282         * include/bits/stl_deque.h (deque): Likewise.
5283         * include/bits/stl_iterator.h (__normal_iterator): Likewise.
5284         * include/bits/stl_list.h (list): Likewise.
5285         * include/bits/stl_vector.h (vector): Likewise.
5286         * include/debug/deque (__gnu_debug::deque): Likewise.
5287         * include/debug/forward_list (__gnu_debug::forward_list): Likewise.
5288         * include/debug/list (__gnu_debug::list): Likewise.
5289         * include/debug/safe_iterator.h (__gnu_debug::_Safe_iterator):
5290         Likewise.
5291         * include/debug/vector (__gnu_debug::vector): Likewise.
5292         * include/ext/pointer.h (__gnu_cxx::_Pointer_adapter): Define
5293         operator<=> for C++20.
5294         * testsuite/23_containers/deque/operators/cmp_c++20.cc: New test.
5295         * testsuite/23_containers/forward_list/cmp_c++20.cc: New test.
5296         * testsuite/23_containers/list/cmp_c++20.cc: New test.
5297         * testsuite/23_containers/vector/bool/cmp_c++20.cc: New test.
5298         * testsuite/23_containers/vector/cmp_c++20.cc: New test.
5299
5300         * include/bits/basic_string.h (basic_string): Define operator<=> and
5301         remove redundant comparison operators for C++20.
5302         * include/bits/char_traits.h (__gnu_cxx::char_traits, char_traits):
5303         Add comparison_category members.
5304         (__detail::__char_traits_cmp_cat): New helper to get comparison
5305         category from char traits class.
5306         * include/bits/regex.h (regex_traits::_RegexMask::operator!=): Do not
5307         define for C++20.
5308         (sub_match): Define operator<=> and remove redundant comparison
5309         operators for C++20.
5310         (match_results): Remove redundant operator!= for C++20.
5311         * include/std/string_view (basic_string_view): Define operator<=> and
5312         remove redundant comparison operators for C++20.
5313         * testsuite/21_strings/basic_string/operators/char/cmp_c++20.cc: New
5314         test.
5315         * testsuite/21_strings/basic_string/operators/wchar_t/cmp_c++20.cc:
5316         New test.
5317         * testsuite/21_strings/basic_string_view/operations/copy/char/
5318         constexpr.cc: Initialize variable.
5319         * testsuite/21_strings/basic_string_view/operations/copy/wchar_t/
5320         constexpr.cc: Likewise.
5321         * testsuite/21_strings/basic_string_view/operators/char/2.cc: Add
5322         dg-do directive and remove comments showing incorrect signatures.
5323         * testsuite/21_strings/basic_string_view/operators/wchar_t/2.cc:
5324         Likewise.
5325         * testsuite/21_strings/basic_string_view/operators/char/cmp_c++20.cc:
5326         New test.
5327         * testsuite/21_strings/basic_string_view/operators/wchar_t/cmp_c++20.cc:
5328         New test.
5329         * testsuite/28_regex/sub_match/compare_c++20.cc: New test.
5330
5331 2020-04-16  Jonathan Wakely  <jwakely@redhat.com>
5332
5333         * testsuite/20_util/unsynchronized_pool_resource/allocate.cc: Remove
5334         name of unused parameter.
5335
5336 2020-04-15  Jonathan Wakely  <jwakely@redhat.com>
5337
5338         * include/bits/fs_dir.h (file_status): Define operator== for C++20.
5339         (directory_entry): Define operator<=> and remove redundant comparison
5340         operators for C++20.
5341         * include/bits/fs_fwd.h (space_info): Define operator== for C++20.
5342         * include/bits/fs_path.h (path): Define operator<=> and remove
5343         redundant comparison operators for C++20.
5344         * testsuite/27_io/filesystem/path/compare/compare.cc: Fix comment.
5345         * testsuite/27_io/filesystem/path/compare/lwg2936.cc: Likewise.
5346         * testsuite/27_io/filesystem/path/compare/path.cc: Likewise.
5347         * testsuite/27_io/filesystem/path/compare/strings.cc: Likewise.
5348
5349         * include/bits/allocator.h (operator!=): Do not define for C++20.
5350         * include/bits/locale_classes.h (operator!=): Likewise.
5351         * include/bits/std_function.h (operator==(nullptr_t, const function&))
5352         (operator!=(const function&, nullptr_t))
5353         (operator!=(nullptr_t, const function&)): Likewise.
5354         * include/ext/bitmap_allocator.h (operator!=): Likewise.
5355         * include/ext/debug_allocator.h (operator!=): Likewise.
5356         * include/ext/extptr_allocator.h (operator!=): Likewise.
5357         * include/ext/malloc_allocator.h (operator!=): Likewise.
5358         * include/ext/mt_allocator.h (operator!=): Likewise.
5359         * include/ext/new_allocator.h (operator!=): Likewise.
5360         * include/ext/pool_allocator.h (operator!=): Likewise.
5361         * include/ext/throw_allocator.h (operator!=): Likewise.
5362         * include/std/bitset (bitset::operator!=): Likewise.
5363         * include/std/memory_resource (operator!=): Likewise.
5364         * include/std/scoped_allocator (operator!=): Likewise.
5365
5366         * include/std/typeindex (operator<=>): Define for C++20.
5367         * testsuite/20_util/typeindex/comparison_operators_c++20.cc: New test.
5368
5369 2020-04-14  Jonathan Wakely  <jwakely@redhat.com>
5370
5371         * libsupc++/compare (compare_three_way): Fix constraint so that
5372         BUILTIN-PTR-THREE-WAY does not require three_way_comparable_with.
5373         * testsuite/18_support/comparisons/object/builtin-ptr-three-way.cc:
5374         New test.
5375
5376         PR libstdc++/94562
5377         * include/bits/shared_ptr.h (operator<=>): Define for C++20.
5378         * include/bits/shared_ptr_base.h (operator<=>): Likewise.
5379         * include/bits/unique_ptr.h (operator<=>): Add inline specifier.
5380         * testsuite/20_util/shared_ptr/comparison/cmp_c++20.cc: New test.
5381         * testsuite/20_util/shared_ptr/comparison/less.cc: Do not expect
5382         std::less<A*> to be used when comparing std::shared_ptr<A> objects in
5383         C++20.
5384
5385         PR libstdc++/94565
5386         * libsupc++/compare (__unspec): Add noexcept-specifier to constructor.
5387         * testsuite/18_support/comparisons/categories/94565.cc: New test.
5388
5389 2020-04-13  Iain Sandoe  <iain@sandoe.co.uk>
5390
5391         * include/std/coroutine: Update coroutines builtin define,
5392         per n4861.
5393
5394 2020-04-09  Jonathan Wakely  <jwakely@redhat.com>
5395
5396         * libsupc++/compare (compare_three_way): Fix noexcept-specifier.
5397         (strong_order, weak_order, partial_order): Replace uses of <=> with
5398         compare_three_way function object (LWG 3324).
5399         * testsuite/18_support/comparisons/algorithms/partial_order.cc: Add
5400         equality operator so that X satisfies three_way_comparable.
5401         * testsuite/18_support/comparisons/algorithms/strong_order.cc:
5402         Likewise.
5403         * testsuite/18_support/comparisons/algorithms/weak_order.cc: Likewise.
5404
5405         * include/bits/unique_ptr.h (operator<=>): Define for C++20.
5406         * testsuite/20_util/default_delete/48631_neg.cc: Adjust dg-error line.
5407         * testsuite/20_util/default_delete/void_neg.cc: Likewise.
5408         * testsuite/20_util/unique_ptr/comparison/compare.cc: New test.
5409         * testsuite/20_util/unique_ptr/comparison/compare_c++20.cc: New test.
5410
5411 2020-04-08  Jonathan Wakely  <jwakely@redhat.com>
5412
5413         * include/bits/slice_array.h (operator==(const slice&, const slice&)):
5414         Define for C++20.
5415         * include/std/complex (operator==(const T&, const complex<T>&))
5416         (operator!=(const complex<T>&, const complex<T>&))
5417         (operator!=(const complex<T>&, const T&))
5418         (operator!=(const T&, const complex<T>&)): Do not declare for C++20.
5419         * testsuite/26_numerics/slice/compare.cc: New test.
5420
5421         * include/std/charconv (to_chars_result, from_chars_result): Add
5422         defaulted equality comparisons for C++20.
5423         * testsuite/20_util/from_chars/compare.cc: New test.
5424         * testsuite/20_util/to_chars/compare.cc: New test.
5425
5426 2020-04-07  Jonathan Wakely  <jwakely@redhat.com>
5427
5428         PR libstdc++/94520
5429         * include/std/charconv (__integer_to_chars_result_type)
5430         (__integer_from_chars_result_type): Use __or_ instead of __or_v_ to
5431         allow use in C++14.
5432         * testsuite/20_util/from_chars/1.cc: Run test as C++14 and replace
5433         use of std::string_view with std::string.
5434         * testsuite/20_util/from_chars/2.cc: Likewise.
5435         * testsuite/20_util/to_chars/1.cc: Likewise.
5436         * testsuite/20_util/to_chars/2.cc: Likewise.
5437
5438 2020-04-06  Jonathan Wakely  <jwakely@redhat.com>
5439
5440         PR libstdc++/94498
5441         * include/bits/char_traits.h (__gnu_cxx::char_traits::move): Make it
5442         usable in constant expressions for C++20.
5443         (__gnu_cxx::char_traits::copy, __gnu_cxx::char_traits::assign): Add
5444         _GLIBCXX20_CONSTEXPR.
5445         (std::char_traits<char>, std::char_traits<wchar_t>)
5446         (std::char_traits<char8_t>): Make move, copy and assign usable in
5447         constant expressions for C++20.
5448         (std::char_traits<char16_t>, std::char_traits<char32_t>): Make move
5449         and copy usable in constant expressions for C++20.
5450         * include/std/string_view (basic_string_view::copy): Add
5451         _GLIBCXX20_CONSTEXPR.
5452         * testsuite/21_strings/basic_string_view/operations/copy/char/
5453         constexpr.cc: New test.
5454         * testsuite/21_strings/basic_string_view/operations/copy/wchar_t/
5455         constexpr.cc: New test.
5456
5457 2020-04-05  Gerald Pfeifer  <gerald@pfeifer.com>
5458
5459         * doc/xml/manual/appendix_contributing.xml: Refer to Git
5460         documentation instead of Subversion.  Switch to https.
5461         * doc/html/manual/appendix_contributing.html: Regenerate.
5462
5463 2020-04-03  Jonathan Wakely  <jwakely@redhat.com>
5464
5465         PR libstdc++/93960
5466         * include/bits/ptr_traits.h (__to_address): Add special case for debug
5467         iterators, to avoid dereferenceable check.
5468         * testsuite/20_util/to_address/1_neg.cc: Adjust dg-error line number.
5469         * testsuite/20_util/to_address/debug.cc: New test.
5470
5471 2020-04-01  Andrea Corallo  <andrea.corallo@arm.com>
5472
5473         * testsuite/experimental/net/execution_context/use_service.cc:
5474         Require pthread and gthreads.
5475
5476 2020-04-01  Gerald Pfeifer  <gerald@pfeifer.com>
5477
5478         * doc/xml/manual/appendix_free.xml: Move "free books" list from
5479         fsf.org to gnu.org.
5480         * doc/html/manual/appendix_free.html: Regenerate.
5481
5482 2020-03-31  Ville Voutilainen  <ville.voutilainen@gmail.com>
5483
5484         Library-side tests for parenthesized aggregate init
5485
5486         PR c++/92878
5487         PR c++/92947
5488
5489         * testsuite/20_util/allocator_traits/members/92878_92947.cc: New.
5490         * testsuite/20_util/any/assign/92878_92947.cc: Likewise.
5491         * testsuite/20_util/any/cons/92878_92947.cc: Likewise.
5492         * testsuite/20_util/is_constructible/92878_92947.cc: Likewise.
5493         * testsuite/20_util/optional/assignment/92878_92947.cc: Likewise.
5494         * testsuite/20_util/optional/cons/92878_92947.cc: Likewise.
5495         * testsuite/20_util/pair/cons/92878_92947.cc: Likewise.
5496         * testsuite/20_util/shared_ptr/creation/92878_92947.cc: Likewise.
5497         * testsuite/20_util/specialized_algorithms/construct_at/92878_92947.cc:
5498         Likewise.
5499         * testsuite/20_util/unique_ptr/creation/92878_92947.cc: Likewise.
5500         * testsuite/20_util/uses_allocator/92878_92947.cc: Likewise.
5501         * testsuite/20_util/variant/92878_92947.cc: Likewise.
5502         * testsuite/23_containers/deque/modifiers/emplace/92878_92947.cc:
5503         Likewise.
5504         * testsuite/23_containers/forward_list/modifiers/92878_92947.cc:
5505         Likewise.
5506         * testsuite/23_containers/list/modifiers/emplace/92878_92947.cc:
5507         Likewise.
5508         * testsuite/23_containers/map/modifiers/emplace/92878_92947.cc:
5509         Likewise.
5510         * testsuite/23_containers/multimap/modifiers/emplace/92878_92947.cc:
5511         Likewise.
5512         * testsuite/23_containers/multiset/modifiers/emplace/92878_92947.cc:
5513         Likewise.
5514         * testsuite/23_containers/priority_queue/92878_92947.cc: Likewise.
5515         * testsuite/23_containers/queue/92878_92947.cc: Likewise.
5516         * testsuite/23_containers/set/modifiers/emplace/92878_92947.cc:
5517         Likewise.
5518         * testsuite/23_containers/stack/92878_92947.cc: Likewise.
5519         * testsuite/23_containers/unordered_map/modifiers/92878_92947.cc:
5520         Likewise.
5521         * testsuite/23_containers/unordered_multimap/modifiers/92878_92947.cc:
5522         Likewise.
5523         * testsuite/23_containers/unordered_multiset/modifiers/92878_92947.cc:
5524         Likewise.
5525         * testsuite/23_containers/unordered_set/modifiers/92878_92947.cc:
5526         Likewise.
5527         * testsuite/23_containers/vector/modifiers/emplace/92878_92947.cc:
5528         Likewise.
5529
5530 2020-03-28  Jonathan Wakely  <jwakely@redhat.com>
5531
5532         * testsuite/20_util/is_constructible/value-2.cc: Fix test to account
5533         for changes due to parenthesized aggregate-initialization in C++20.
5534         * testsuite/20_util/time_point/cons/81468.cc: Fix test to not clash
5535         with std::chrono::sys_time in C++20.
5536
5537         * include/bits/stl_iterator.h (reverse_iterator): Use requires-clause
5538         to constrain C++20 versions of comparison operators. Fix backwards
5539         logic of relational operators.
5540         (move_iterator): Use requires-clause to constrain comparison operators
5541         in C++20. Do not declare non-standard same-type overloads for C++20.
5542         * testsuite/24_iterators/move_iterator/rel_ops_c++20.cc: Check result
5543         of comparisons and check using greedy_ops type.
5544         * testsuite/24_iterators/reverse_iterator/rel_ops_c++20.cc: Likewise.
5545         * testsuite/24_iterators/move_iterator/greedy_ops.cc: Remove redundant
5546         main function from compile-only test.
5547         * testsuite/24_iterators/reverse_iterator/greedy_ops.cc: Likewise.
5548
5549 2020-03-27  Jonathan Wakely  <jwakely@redhat.com>
5550
5551         * include/bits/range_cmp.h (__cpp_lib_ranges): Define.
5552         * include/bits/stl_iterator.h: Check value of __cpp_concepts so that
5553         C++20 concepts are required.
5554         * include/bits/stl_iterator_base_types.h: Likewise.
5555         * include/std/concepts: Likewise.
5556         * include/std/version: Likewise.
5557         * testsuite/std/ranges/headers/ranges/synopsis.cc: Check feature test
5558         macro.
5559
5560         * include/bits/stl_iterator.h (reverse_iterator::iterator_concept)
5561         (reverse_iterator::iterator_category): Define for C++20.
5562         (reverse_iterator): Define comparison operators correctly for C++20.
5563         (__normal_iterator): Add constraints to comparison operators for C++20.
5564         (move_iterator::operator++(int)) [__cpp_lib_concepts]: Define new
5565         overload for input iterators.
5566         (move_iterator): Add constraints to comparison operators for C++20.
5567         Define operator<=> for C++20.
5568         * testsuite/24_iterators/move_iterator/input_iterator.cc: New test.
5569         * testsuite/24_iterators/move_iterator/move_only.cc: New test.
5570         * testsuite/24_iterators/move_iterator/rel_ops_c++20.cc: New test.
5571         * testsuite/24_iterators/reverse_iterator/rel_ops_c++20.cc: New test.
5572
5573         * include/bits/iterator_concepts.h (__detail::__decay_copy)
5574         (__detail::__member_begin, __detail::__adl_begin): Move here from
5575         <bits/range_access.h>.
5576         (__detail::__ranges_begin, __detail::__range_iter_t): Define.
5577         * bits/range_access.h (__cust_access::__decay_copy)
5578         (__cust_access::__member_begin, __cust_access::__adl_begin): Move to
5579         <bits/iterator_concepts.h>.
5580         (ranges::iterator_t): Use __detail::__range_iter_t.
5581         * include/bits/stl_iterator.h (back_insert_iterator): Simplify
5582         conditional compilation. Add _GLIBCXX20_CONSTEXPR to all members.
5583         (front_insert_iterator): Likewise.
5584         (insert_iterator): Implement changes from P0896R4 for C++20.
5585         * testsuite/24_iterators/back_insert_iterator/constexpr.cc: New test.
5586         * testsuite/24_iterators/front_insert_iterator/constexpr.cc: New test.
5587         * testsuite/24_iterators/headers/iterator/synopsis_c++17.cc: Adjust
5588         for inclusion in synopsis_c++20.cc which expects different signatures
5589         for some function templates.
5590         * testsuite/24_iterators/insert_iterator/constexpr.cc: New test.
5591
5592         * include/std/type_traits (__is_array_convertible): Move definition
5593         to immediately after is_convertible.
5594
5595 2020-03-26  Jonathan Wakely  <jwakely@redhat.com>
5596
5597         * include/std/chrono (chrono::days, chrono::weeks, chrono::years)
5598         (chrono::months, chrono::sys_days, chrono::local_t)
5599         (chrono::local_time, chrono::local_seconds, chrono::local_days):
5600         Define for C++20.
5601         (chrono::time_point): Add missing static assert.
5602         * testsuite/20_util/time_point/requirements/duration_neg.cc: New test.
5603         * testsuite/std/time/clock/file/overview.cc: New test.
5604         * testsuite/std/time/clock/file/members.cc: New test.
5605         * testsuite/std/time/syn_c++20.cc: New test.
5606
5607 2020-03-25  Mike Crowe  <mac@mcrowe.com>
5608
5609         * testsuite/30_threads/shared_timed_mutex/try_lock_until/1.cc: New
5610         test.
5611         * testsuite/30_threads/shared_timed_mutex/try_lock_until/2.cc: New
5612         test.
5613
5614 2020-03-25  Jonathan Wakely  <jwakely@redhat.com>
5615
5616         * include/bits/fs_fwd.h (filesystem::__file_clock): Move to ...
5617         * include/std/chrono (filesystem::__file_clock): Here.
5618         (filesystem::__file_clock::from_sys, filesystem::__file_clock::to_sys):
5619         Define public member functions for C++20.
5620         (is_clock, is_clock_v): Define traits for C++20.
5621         * include/std/condition_variable (condition_variable::wait_until): Add
5622         check for valid clock.
5623         * include/std/future (_State_baseV2::wait_until): Likewise.
5624         * include/std/mutex (__timed_mutex_impl::_M_try_lock_until): Likewise.
5625         * include/std/shared_mutex (shared_timed_mutex::try_lock_shared_until):
5626         Likewise.
5627         * include/std/thread (this_thread::sleep_until): Likewise.
5628         * testsuite/30_threads/condition_variable/members/2.cc: Qualify
5629         slow_clock with new namespace.
5630         * testsuite/30_threads/condition_variable/members/clock_neg.cc: New
5631         test.
5632         * testsuite/30_threads/condition_variable_any/members/clock_neg.cc:
5633         New test.
5634         * testsuite/30_threads/future/members/clock_neg.cc: New test.
5635         * testsuite/30_threads/recursive_timed_mutex/try_lock_until/3.cc:
5636         Qualify slow_clock with new namespace.
5637         * testsuite/30_threads/recursive_timed_mutex/try_lock_until/
5638         clock_neg.cc: New test.
5639         * testsuite/30_threads/shared_future/members/clock_neg.cc: New
5640         test.
5641         * testsuite/30_threads/shared_lock/locking/clock_neg.cc: New test.
5642         * testsuite/30_threads/shared_timed_mutex/try_lock_until/clock_neg.cc:
5643         New test.
5644         * testsuite/30_threads/timed_mutex/try_lock_until/3.cc: Qualify
5645         slow_clock with new namespace.
5646         * testsuite/30_threads/timed_mutex/try_lock_until/4.cc: Likewise.
5647         * testsuite/30_threads/timed_mutex/try_lock_until/clock_neg.cc: New
5648         test.
5649         * testsuite/30_threads/unique_lock/locking/clock_neg.cc: New test.
5650         * testsuite/std/time/traits/is_clock.cc: New test.
5651         * testsuite/util/slow_clock.h (slow_clock): Move to __gnu_test
5652         namespace.
5653
5654 2020-03-21  Jonathan Wakely  <jwakely@redhat.com>
5655
5656         PR libstdc++/93245
5657         * include/experimental/bits/fs_path.h (path::generic_string<C,T,A>()):
5658         * testsuite/experimental/filesystem/path/generic/generic_string.cc:
5659         Improve test coverage.
5660
5661         PR libstdc++/94242
5662         * include/bits/fs_path.h (path::_S_str_convert): Replace first
5663         parameter with basic_string_view so that strings with different
5664         allocators can be accepted.
5665         (path::generic_string<C,T,A>()): Use basic_string object that uses the
5666         right allocator type.
5667         * testsuite/27_io/filesystem/path/generic/94242.cc: New test.
5668         * testsuite/27_io/filesystem/path/generic/generic_string.cc: Improve
5669         test coverage.
5670
5671 2020-03-18  Jonathan Wakely  <jwakely@redhat.com>
5672
5673         PR libstdc++/94033
5674         * include/std/type_traits (__is_nt_default_constructible_atom): Remove.
5675         (__is_nt_default_constructible_impl): Remove.
5676         (__is_nothrow_default_constructible_impl): Remove.
5677         (__is_nt_constructible_impl): Add bool template parameter. Adjust
5678         partial specializations.
5679         (__is_nothrow_constructible_impl): Replace class template with alias
5680         template.
5681         (is_nothrow_default_constructible): Derive from alias template
5682         __is_nothrow_constructible_impl instead of
5683         __is_nothrow_default_constructible_impl.
5684         * testsuite/20_util/is_nothrow_constructible/94003.cc: New test.
5685
5686         * include/std/stop_token (stop_token::_Stop_state_ref): Define
5687         comparison operators explicitly if the compiler won't synthesize them.
5688
5689         * include/bits/stl_algobase.h (__lexicographical_compare_aux): Check
5690         __cpp_lib_concepts before using iter_reference_t.
5691         * include/bits/stream_iterator.h (istream_iterator): Check
5692         __cpp_lib_concepts before using default_sentinel_t.
5693         * include/bits/streambuf_iterator.h (istreambuf_iterator): Likewise.
5694
5695         PR libstdc++/94203
5696         * include/experimental/executor (executor::executor(Executor)): Call
5697         make_shared directly instead of _M_create. Create _Tgt1 object.
5698         (executor::executor(allocator_arg_t, const ProtoAlloc&, Executor)):
5699         Call allocate_shared directly instead of _M_create. Create _Tgt2
5700         object.
5701         (executor::target_type): Add cast needed for new _Tgt interface.
5702         (executor::target): Define when RTTI is disabled. Use _Tgt::_M_func.
5703         (executor::_Tgt): Define the same interface whether RTTI is enabled or
5704         not.
5705         (executor::_Tgt::target_type, executor::_Tgt::target): Do not use
5706         std::type_info in the interface.
5707         (executor::_Tgt::_M_func): Add data member.
5708         (executor::_TgtImpl): Replace with _Tgt1 and _Tgt2 class templates.
5709         (executor::_Tgt1::_S_func): Define function to access target without
5710         depending on RTTI.
5711         (executor::_M_create): Remove.
5712         (operator==, operator!=): Simplify comparisons for executor.
5713         * include/experimental/socket (is_error_code_enum<socket_errc>):
5714         Define specialization before use.
5715         * testsuite/experimental/net/executor/1.cc: New test.
5716
5717 2020-03-16  Jonathan Wakely  <jwakely@redhat.com>
5718
5719         PR libstdc++/94199
5720         * include/experimental/executor (service_already_exists): Add default
5721         constructor. Declare make_service to be a friend.
5722         * testsuite/experimental/net/execution_context/make_service.cc: New
5723         test.
5724
5725 2020-03-12  Jonathan Wakely  <jwakely@redhat.com>
5726
5727         * testsuite/tr1/8_c_compatibility/cstdlib/functions.cc: Do not pass
5728         a null pointer to functions with nonnull(1) attribute.
5729
5730 2020-03-11  Patrick Palka  <ppalka@redhat.com>
5731
5732         * include/std/ranges (split_view::_OuterIter::_OuterIter): Typo fix,
5733         'address' -> 'std::__addressof'.
5734         * testsuite/std/ranges/adaptors/split.cc: Test taking the split_view of
5735         a non-forward input_range.
5736         * testsuite/util/testsuite_iterators.h (output_iterator_wrapper): Make
5737         default constructor protected instead of deleted, like with
5738         input_iterator_wrapper.
5739         (test_range::iterator): Add comment explaining that this type is used
5740         only when the underlying wrapper is input_iterator_wrapper or
5741         output_iterator_wrapper.  Remove delegating defaulted constructor so
5742         that the inherited default constructor is used instead.
5743
5744         LWG 3286 ranges::size is not required to be valid after a call to
5745         ranges::begin on an input range
5746         * include/std/ranges (subrange::subrange): Split single-argument
5747         constructor into two, one constrained by _S_store_size and another by
5748         !_S_store_size.
5749         (take_view::begin): Call size() before calling ranges::begin(_M_base).
5750         * testsuite/std/ranges/adaptors/lwg3286.cc: New test.
5751         * testsuite/std/ranges/subrange/lwg3286.cc: New test.
5752
5753 2020-03-10  Jonathan Wakely  <jwakely@redhat.com>
5754
5755         * include/std/ranges (split_view::_OuterIter::__at_end): Use __current
5756         instead of _M_current.
5757         (split_view::_OuterIter::operator++): Likewise.
5758
5759         * include/std/ranges (transform_view::_Iterator::__iter_move): Remove.
5760         (transform_view::_Iterator::operator*): Add noexcept-specifier.
5761         (transform_view::_Iterator::iter_move): Inline __iter_move body here.
5762         (split_view::_OuterIter::__current): Add noexcept.
5763         (split_view::_InnerIter::__iter_swap): Remove.
5764         (split_view::_InnerIter::__iter_move): Remove.
5765         (split_view::_InnerIter::_M_i_current): New accessors.
5766         (split_view::_InnerIter::__at_end): Use _M_i_current().
5767         (split_view::_InnerIter::operator*): Likewise.
5768         (split_view::_InnerIter::operator++): Likewise.
5769         (iter_move(const _InnerIter&)): Likewise.
5770         (iter_swap(const _InnerIter&, const _InnerIter&)): Likewise.
5771         * testsuite/std/ranges/adaptors/split.cc: Check noexcept-specifier
5772         for iter_move and iter_swap on split_view's inner iterator.
5773
5774         PR c++/94117
5775         * include/std/ranges (ranges::transform_view::_Iterator::iter_move):
5776         Change expression in noexcept-specifier to match function body.
5777
5778         * testsuite/23_containers/unordered_set/allocator/ext_ptr.cc: Add
5779         comment explaining multiple dg-do directives.
5780         * testsuite/24_iterators/ostream_iterator/1.cc: Fix do-do directive
5781         so test is run as well as compiled.
5782
5783 2020-03-09  Jonathan Wakely  <jwakely@redhat.com>
5784
5785         PR libstdc++/94063
5786         * src/c++17/fs_path.cc (path::operator+=(const path&)): Add kluge to
5787         handle concatenations that change the type of the first component.
5788         (path::operator+=(basic_string_view<value_type>)): Likewise.
5789         * testsuite/27_io/filesystem/path/concat/94063.cc: New test.
5790
5791 2020-03-06  Patrick Palka  <ppalka@redhat.com>
5792
5793         * include/std/ranges (join_view::_Sentinel<_Const>): Befriend
5794         join_view::_Sentinel<!_Const>.
5795         * testsuite/std/ranges/adaptors/join.cc: Augment test.
5796
5797         PR libstdc++/93978
5798         * include/bits/range_access.h (__cust_access::_Empty::operator()):
5799         Declare return type to be bool instead of auto.
5800         * testsuite/std/ranges/adaptors/93978.cc: New test.
5801
5802 2020-03-06  Jonathan Wakely  <jwakely@redhat.com>
5803
5804         PR libstdc++/94069
5805         * include/std/shared_mutex [!PTHREAD_RWLOCK_INITIALIZER]
5806         (__shared_mutex_pthread::__shared_mutex_pthread()): Remove incorrect
5807         second argument to __glibcxx_rwlock_init.
5808         * testsuite/30_threads/shared_timed_mutex/94069.cc: New test.
5809
5810         PR libstdc++/93244
5811         * testsuite/27_io/filesystem/path/generic/generic_string.cc: Adjust
5812         test to not fail due to PR 94063.
5813         * testsuite/27_io/filesystem/path/generic/utf.cc: Likewise.
5814         * testsuite/27_io/filesystem/path/generic/wchar_t.cc: Likewise.
5815
5816 2020-03-06  Andreas Krebbel  <krebbel@linux.ibm.com>
5817
5818         * src/c++11/system_error.cc: Omit the ENOTSUP case statement if it
5819         would match ENOSYS.
5820
5821 2020-03-05  Jonathan Wakely  <jwakely@redhat.com>
5822
5823         * testsuite/27_io/filesystem/operations/all.cc: Mark unused variable.
5824         * testsuite/27_io/filesystem/operations/copy.cc: Fix typo.
5825         * testsuite/experimental/filesystem/operations/copy.cc: Likewise.
5826         * testsuite/27_io/filesystem/operations/file_size.cc: Use correct type
5827         for return value, and in comparison.
5828         * testsuite/experimental/filesystem/operations/file_size.cc: Likewise.
5829
5830         PR libstdc++/94051
5831         * include/std/string_view: Include <bits/ostream_insert.h>.
5832         * testsuite/21_strings/basic_string_view/inserters/94051.cc: New test.
5833
5834 2020-03-04  Jonathan Wakely  <jwakely@redhat.com>
5835
5836         * include/bits/cpp_type_traits.h (__memcpyable): Fix comment.
5837
5838 2020-03-04  Patrick Palka  <ppalka@redhat.com>
5839
5840         PR libstdc++/94017
5841         * include/bits/ranges_algobase.h (__fill_n_fn::operator()): Refine
5842         condition for when to use memset, making sure to additionally check that
5843         the output pointer's value type is a non-volatile byte type.  Instead of
5844         requiring that the fill type is a byte type, just require that it's an
5845         integral type.
5846         * testsuite/20_util/specialized_algorithms/uninitialized_fill/94017.cc:
5847         New test.
5848         * testsuite/20_util/specialized_algorithms/uninitialized_fill_n/94017.cc:
5849         New test.
5850         * testsuite/25_algorithms/fill/94013.cc: Uncomment part of test that was
5851         blocked by PR 94017.
5852         * testsuite/25_algorithms/fill/94017.cc: New test.
5853         * testsuite/25_algorithms/fill_n/94017.cc: New test.
5854
5855         LWG 3355 The memory algorithms should support move-only input iterators
5856         introduced by P1207
5857         * include/bits/ranges_uninitialized.h
5858         (__uninitialized_copy_fn::operator()): Use std::move to avoid attempting
5859         to copy __ifirst, which could be a move-only input iterator.  Use
5860         operator- instead of ranges::distance to compute distance from a sized
5861         sentinel.
5862         (__uninitialized_copy_n_fn::operator()): Likewise.
5863         (__uninitialized_move_fn::operator()): Likewise.
5864         (__uninitialized_move_n_fn::operator()): Likewise.
5865         (__uninitialized_destroy_fn::operator()): Use std::move to avoid
5866         attempting to copy __first.
5867         (__uninitialized_destroy_n_fn::operator()): Likewise.
5868         * testsuite/20_util/specialized_algorithms/destroy/constrained.cc:
5869         Augment test.
5870         * .../specialized_algorithms/uninitialized_copy/constrained.cc:
5871         Likewise.
5872         * .../specialized_algorithms/uninitialized_move/constrained.cc:
5873         Likewise.
5874
5875         * testsuite/util/testsuite_iterators.h (test_range::get_iterator): Make
5876         protected instead of private.
5877         (test_sized_range_sized_sent): New.
5878
5879         * testsuite/util/testsuite_iterators.h (input_iterator_wrapper_nocopy):
5880         New testsuite iterator.
5881         * testsuite/24_iterators/counted_iterator/lwg3389.cc: use it.
5882         * testsuite/24_iterators/move_iterator/lwg3390.cc: Likewise.
5883
5884         * include/bits/ranges_uninitialized.h
5885         (uninitialized_copy_fn::operator()): Pass a reference type as the first
5886         argument to is_nothrow_assignable_v.
5887         (uninitialized_copy_fn::operator()): Likewise.
5888         (uninitialized_move_fn::operator()): Likewise.  Return an in_out_result
5889         with the input iterator stripped of its move_iterator.
5890         (uninitialized_move_n_fn::operator()): Likewise.
5891         (uninitialized_fill_fn::operator()): Pass a reference type as the first
5892         argument to is_nothrow_assignable_v.
5893         (uninitialized_fill_n_fn::operator()): Likewise.
5894
5895 2020-03-03  Jonathan Wakely  <jwakely@redhat.com>
5896
5897         PR libstdc++/94013
5898         * include/bits/cpp_type_traits.h (__memcpyable, __memcmpable): New
5899         traits to control when to use memmove and memcmp optimizations.
5900         (__is_nonvolatile_trivially_copyable): New helper trait.
5901         * include/bits/ranges_algo.h (__lexicographical_compare_fn): Do not
5902         use memcmp optimization with volatile data.
5903         * include/bits/ranges_algobase.h (__equal_fn): Use __memcmpable.
5904         (__copy_or_move, __copy_or_move_backward): Use __memcpyable.
5905         * include/bits/stl_algobase.h (__copy_move_a2): Use __memcpyable.
5906         (__copy_move_backward_a2): Likewise.
5907         (__equal_aux1): Use __memcmpable.
5908         (__lexicographical_compare_aux): Do not use memcmp optimization with
5909         volatile data.
5910         * testsuite/25_algorithms/copy/94013.cc: New test.
5911         * testsuite/25_algorithms/copy_backward/94013.cc: New test.
5912         * testsuite/25_algorithms/equal/94013.cc: New test.
5913         * testsuite/25_algorithms/fill/94013.cc: New test.
5914         * testsuite/25_algorithms/lexicographical_compare/94013.cc: New test.
5915         * testsuite/25_algorithms/move/94013.cc: New test.
5916         * testsuite/25_algorithms/move_backward/94013.cc: New test.
5917
5918         * include/bits/stl_algobase.h (lexicographical_compare_three_way):
5919         Avoid redundant iterator comparisons (LWG 3410).
5920
5921 2020-03-02  Jonathan Wakely  <jwakely@redhat.com>
5922
5923         PR libstdc++/93972
5924         * include/bits/stl_algobase.h (__memcmp): Allow pointer types to
5925         differ.
5926         * testsuite/25_algorithms/lexicographical_compare/uchar.cc: New test.
5927
5928         * include/std/ranges (__detail::__maybe_empty_t): Rename to
5929         __maybe_present_t.
5930         (__adaptor::_RangeAdaptor, join_view, split_view): Use new name.
5931
5932         * include/bits/ranges_algo.h (shift_right): Add 'typename' to
5933         dependent type.
5934
5935 2020-03-01  H.J. Lu  <hongjiu.lu@intel.com>
5936
5937         * config/abi/post/x86_64-linux-gnu/x32/baseline_symbols.txt: Updated.
5938
5939 2020-02-29  John David Anglin  <danglin@gcc.gnu.org>
5940
5941         * testsuite/17_intro/headers/c++1998/charset.cc: Skip on *-*-hpux*.
5942         * testsuite/17_intro/headers/c++2011/charset.cc: Likewise.
5943         * testsuite/17_intro/headers/c++2014/charset.cc: Likewise.
5944         * testsuite/17_intro/headers/c++2017/charset.cc: Likewise.
5945         * testsuite/17_intro/headers/c++2020/charset.cc: Likewise.
5946
5947         * testsuite/30_threads/condition_variable_any/stop_token/wait_on.cc:
5948         Add libatomic option.
5949         * testsuite/30_threads/jthread/jthread.cc: Likewise.
5950
5951 2020-02-29  François Dumont  <fdumont@gcc.gnu.org>
5952
5953         * include/bits/stl_algo.h
5954         (__find_if, __count_if, __is_permutation, std::is_permutation): Move...
5955         * include/bits/stl_algobase.h: ...here.
5956         * include/bits/hashtable_policy.h: Remove <bits/stl_algo.h> include.
5957
5958 2020-02-29  John David Anglin  <danglin@gcc.gnu.org>
5959
5960         * testsuite/30_threads/stop_token/stop_callback.cc: Add libatomic
5961         option.
5962         * testsuite/30_threads/stop_token/stop_callback/deadlock-mt.cc:
5963         Likewise.
5964         * testsuite/30_threads/stop_token/stop_callback/deadlock.cc: Likewise.
5965         * testsuite/30_threads/stop_token/stop_callback/destroy.cc: Likewise.
5966         * testsuite/30_threads/stop_token/stop_callback/invoke.cc: Likewise.
5967         * testsuite/30_threads/stop_token/stop_source.cc: Likewise.
5968         * testsuite/30_threads/stop_token/stop_source/assign.cc: Likewise.
5969         * testsuite/30_threads/stop_token/stop_token.cc: Likewise.
5970         * testsuite/30_threads/stop_token/stop_token/stop_possible.cc:
5971         Likewise.
5972
5973         PR libstdc++/92906
5974         * config/abi/post/hppa-linux-gnu/baseline_symbols.txt: Update.
5975
5976 2020-02-28  Patrick Palka  <ppalka@redhat.com>
5977
5978         PR libstdc++/93972
5979         * include/bits/ranges_algo.h (__lexicographical_compare_fn::operator()):
5980         Fix condition for when to use memcmp, making it consistent with the
5981         corresponding condition used in std::lexicographical_compare.
5982         * testsuite/25_algorithms/lexicographical_compare/93972.cc: New test.
5983
5984         * testsuite/26_numerics/headers/numeric/synopsis.cc: Add signatures for
5985         functions introduced in C++11, C++17 and C++2a.  Add 'constexpr' to
5986         existing signatures for C++2a.
5987
5988 2020-02-28  Jonathan Wakely  <jwakely@redhat.com>
5989
5990         * testsuite/24_iterators/range_operations/advance_debug_neg.cc: Run
5991         test instead of just compiling it.
5992
5993 2020-02-28  Patrick Palka  <ppalka@redhat.com>
5994
5995         * include/std/ranges (reverse_view::_S_needs_cached_begin): Set to false
5996         whenever the underlying range models common_range.
5997
5998         * include/std/ranges (__detail::_CachedPosition): New struct.
5999         (views::filter_view::_S_needs_cached_begin): New member variable.
6000         (views::filter_view::_M_cached_begin): New member variable.
6001         (views::filter_view::begin): Use _M_cached_begin to cache its
6002         result.
6003         (views::drop_view::_S_needs_cached_begin): New static member variable.
6004         (views::drop_view::_M_cached_begin): New member variable.
6005         (views::drop_view::begin): Use _M_cached_begin to cache its result
6006         when _S_needs_cached_begin.
6007         (views::drop_while_view::_M_cached_begin): New member variable.
6008         (views::drop_while_view::begin): Use _M_cached_begin to cache its
6009         result.
6010         (views::reverse_view::_S_needs_cached_begin): New static member
6011         variable.
6012         (views::reverse_view::_M_cached_begin): New member variable.
6013         (views::reverse_view::begin): Use _M_cached_begin to cache its result
6014         when _S_needs_cached_begin.
6015         * testsuite/std/ranges/adaptors/drop.cc: Augment test to check that
6016         drop_view::begin caches its result.
6017         * testsuite/std/ranges/adaptors/drop_while.cc: Augment test to check
6018         that drop_while_view::begin caches its result.
6019         * testsuite/std/ranges/adaptors/filter.cc: Augment test to check that
6020         filter_view::begin caches its result.
6021         * testsuite/std/ranges/adaptors/reverse.cc: Augment test to check that
6022         reverse_view::begin caches its result.
6023
6024 2020-02-28  Jonathan Wakely  <jwakely@redhat.com>
6025
6026         * testsuite/27_io/filesystem/operations/last_write_time.cc: Fixes for
6027         filesystems that silently truncate timestamps.
6028         * testsuite/experimental/filesystem/operations/last_write_time.cc:
6029         Likewise.
6030
6031         * testsuite/21_strings/basic_string/cons/char/1.cc: Disable
6032         -Wstringop-overflow warnings.
6033
6034 2020-02-27  Jonathan Wakely  <jwakely@redhat.com>
6035
6036         * testsuite/lib/libstdc++.exp (v3_target_compile): Add
6037         -fdiagnostics-urls=never to options.
6038
6039 2020-02-27  Patrick Palka  <ppalka@redhat.com>
6040
6041         * include/std/ranges (transform_view::_Iterator<_Const>): Befriend
6042         _Iterator<!_Const>.
6043         (transform_view::_Sentinel<_Const>): Befriend _Sentinel<!_Const>.
6044         (take_view::_Sentinel<_Const>): Likewise.
6045         (take_while_view::_Sentinel<_Const>): Likewise.
6046         (split_view::_OuterIter<_Const>): Befriend _OuterIter<!_Const>.
6047         * testsuite/std/ranges/adaptors/split.cc: Augment test.
6048         * testsuite/std/ranges/adaptors/take.cc: Augment test.
6049         * testsuite/std/ranges/adaptors/take_while.cc: Augment test.
6050         * testsuite/std/ranges/adaptors/transform.cc: Augment test.
6051
6052         * testsuite/25_algorithms/copy/constrained.cc: Don't assume that the
6053         base() of a vector<>::iterator is a pointer.
6054         * testsuite/25_algorithms/copy_backward/constrained.cc: Likewise.
6055         * testsuite/25_algorithms/move/constrained.cc: Likewise.
6056         * testsuite/25_algorithms/move_backward/constrained.cc: Likewise.
6057         * testsuite/25_algorithms/inplace_merge/constrained.cc: Use foo.data()
6058         instead of &foo[0].
6059         * testsuite/25_algorithms/partial_sort/constrained.cc: Likewise.
6060         * testsuite/25_algorithms/partial_sort_copy/constrained.cc: Likewise.
6061         * testsuite/25_algorithms/shuffle/constrained.cc: Likewise.
6062         * testsuite/25_algorithms/sort/constrained.cc: Likewise.
6063         * testsuite/25_algorithms/stable_sort/constrained.cc: Likewise.
6064
6065 2020-02-27  Jonathan Wakely  <jwakely@redhat.com>
6066
6067         * include/debug/array (operator<=>): Define for C++20.
6068         * testsuite/23_containers/array/tuple_interface/get_debug_neg.cc:
6069         Adjust dg-error line numbers.
6070         * testsuite/23_containers/array/tuple_interface/
6071         tuple_element_debug_neg.cc: Likewise.
6072
6073         * testsuite/23_containers/span/back_assert_neg.cc: Add #undef before
6074         defining _GLIBCXX_ASSERTIONS.
6075         * testsuite/23_containers/span/first_2_assert_neg.cc: Likewise.
6076         * testsuite/23_containers/span/first_assert_neg.cc: Likewise.
6077         * testsuite/23_containers/span/front_assert_neg.cc: Likewise.
6078         * testsuite/23_containers/span/index_op_assert_neg.cc: Likewise.
6079         * testsuite/23_containers/span/last_2_assert_neg.cc: Likewise.
6080         * testsuite/23_containers/span/last_assert_neg.cc: Likewise.
6081         * testsuite/23_containers/span/subspan_2_assert_neg.cc: Likewise.
6082         * testsuite/23_containers/span/subspan_3_assert_neg.cc: Likewise.
6083         * testsuite/23_containers/span/subspan_4_assert_neg.cc: Likewise.
6084         * testsuite/23_containers/span/subspan_5_assert_neg.cc: Likewise.
6085         * testsuite/23_containers/span/subspan_6_assert_neg.cc: Likewise.
6086         * testsuite/23_containers/span/subspan_assert_neg.cc: Likewise.
6087
6088         * include/debug/string (__gnu_debug::basic_string::insert): Fix for
6089         C++98 where the member function of the base class returns void.
6090
6091         * testsuite/util/testsuite_iterators.h (forward_iterator_wrapper): Add
6092         equality comparisons that support value-initialized iterators.
6093
6094         * include/bits/boost_concept_check.h (__function_requires): Add
6095         _GLIBCXX14_CONSTEXPR.
6096         * testsuite/25_algorithms/min/concept_checks.cc: New test.
6097
6098 2020-02-26  Patrick Palka  <ppalka@redhat.com>
6099
6100         PR libstdc++/93936
6101         * include/std/ranges (split_view::_InnerIter::operator==): Compare
6102         the operands' _M_i rather than their _M_i.current().
6103         * testsuite/std/ranges/adaptors/split.cc: Augment test.
6104
6105         P1645R1 constexpr for <numeric> algorithms
6106         * include/bits/stl_numeric.h (iota, accumulate, inner_product,
6107         partial_sum, adjacent_difference): Make conditionally constexpr for
6108         C++20.
6109         * include/std/numeric (__cpp_lib_constexpr_numeric): Define this feature
6110         test macro.
6111         (reduce, transform_reduce, exclusive_scan, inclusive_scan,
6112         transform_exclusive_scan, transform_inclusive_scan): Make conditionally
6113         constexpr for C++20.
6114         * include/std/version (__cpp_lib_constexpr_numeric): Define.
6115         * testsuite/26_numerics/accumulate/constexpr.cc: New test.
6116         * testsuite/26_numerics/adjacent_difference/constexpr.cc: Likewise.
6117         * testsuite/26_numerics/exclusive_scan/constexpr.cc: Likewise.
6118         * testsuite/26_numerics/inclusive_scan/constexpr.cc: Likewise.
6119         * testsuite/26_numerics/inner_product/constexpr.cc: Likewise.
6120         * testsuite/26_numerics/iota/constexpr.cc: Likewise.
6121         * testsuite/26_numerics/partial_sum/constexpr.cc: Likewise.
6122         * testsuite/26_numerics/reduce/constexpr.cc: Likewise.
6123         * testsuite/26_numerics/transform_exclusive_scan/constexpr.cc: Likewise.
6124         * testsuite/26_numerics/transform_inclusive_scan/constexpr.cc: Likewise.
6125         * testsuite/26_numerics/transform_reduce/constexpr.cc: Likewise.
6126
6127 2020-02-26  Jonathan Wakely  <jwakely@redhat.com>
6128
6129         * include/bits/ranges_algo.h (__lexicographical_compare_fn): Declare
6130         variables in smaller scope and avoid calling ranges::distance when we
6131         know they are pointers. Remove statically-unreachable use of
6132         __builtin_unreachable().
6133         * include/bits/stl_algobase.h (__lexicographical_compare::__lc):
6134         Define inline.
6135
6136         * include/std/ranges (__detail::__maybe_empty_t): Define new helper
6137         alias.
6138         (__detail::__maybe_const_t): Likewise.
6139         (__adaptor::_RangeAdaptor): Use __maybe_empty_t.
6140         (transform_view, take_view, take_while_view, elements_view): Use
6141         __maybe_const_t.
6142         (join_view, split_view): Use both.
6143
6144 2020-02-25  Patrick Palka  <ppalka@redhat.com>
6145
6146         LWG 3397 basic_istream_view::iterator should not provide
6147         iterator_category
6148         * include/std/ranges (basic_istream_view:_Iterator::iterator_category):
6149         Rename to ...
6150         (basic_istream_view:_Iterator::iterator_concept): ... this.
6151         * testsuite/std/ranges/istream_view.cc: Augment test.
6152
6153         LWG 3325 Constrain return type of transformation function for
6154         transform_view
6155         * include/std/ranges (transform_view): Constrain the return type of the
6156         transformation function as per LWG 3325.
6157         * testsuite/std/ranges/adaptors/lwg3325_neg.cc: New test.
6158
6159         LWG 3313 join_view::_Iterator::operator-- is incorrectly constrained
6160         * include/std/ranges (join_view::_Iterator::operator--): Require that
6161         range_reference_t<_Base> models common_range.
6162         * testsuite/std/ranges/adaptors/lwg3313_neg.cc: New test.
6163
6164         LWG 3301 transform_view::_Iterator has incorrect iterator_category
6165         * include/std/ranges (transform_view::_Iterator::_S_iter_cat): Adjust
6166         determination of iterator_category as per LWG 3301.
6167         * testsuite/std/ranges/adaptors/transform.cc: Augment test.
6168
6169         LWG 3292 iota_view is under-constrained
6170         * include/std/ranges (iota_view): Require that _Winc models semiregular
6171           as per LWG 3292.
6172         * testsuite/std/ranges/iota/lwg3292_neg.cc: New test.
6173
6174 2020-02-25  Jonathan Wakely  <jwakely@redhat.com>
6175
6176         * include/bits/ranges_algobase.h (__copy_or_move): Do not use memmove
6177         during constant evaluation. Call __builtin_memmove directly instead of
6178         __memmove.
6179         (__copy_or_move_backward): Likewise.
6180         * include/bits/stl_algobase.h (__memmove): Remove.
6181         (__copy_move<M, true, random_access_iterator_tag>::__copy_m)
6182         (__copy_move_backward<M, true, random_access_iterator_tag>::__copy_m):
6183         Use __builtin_memmove directly instead of __memmove.
6184         (__copy_move_a2): Do not use memmove during constant evaluation.
6185         (__copy_move_backward_a2): Use _IsMove constant to select correct
6186         __copy_move_backward specialization.
6187         * testsuite/25_algorithms/copy_backward/constexpr.cc: Check for copies
6188         begin turned into moves during constant evaluation.
6189
6190         * testsuite/25_algorithms/move_backward/93872.cc: Add test left out of
6191         previous commit.
6192
6193         PR libstdc++/93872
6194         * include/bits/stl_algobase.h (__memmove): Cast away const before
6195         doing move assignment.
6196         * testsuite/25_algorithms/move/93872.cc: New test.
6197         * testsuite/25_algorithms/move_backward/93872.cc: New test.
6198
6199 2020-02-24  Patrick Palka  <ppalka@redhat.com>
6200
6201         PR libstdc++/93884
6202         * include/bits/ranges_algobase.h (__copy_or_move,
6203         __copy_or_move_backward): Don't inspect the iter_value_t of the output
6204         iterator, instead inspect its iterator_traits directly.
6205         * include/bits/stl_iterator.h (back_insert_iterator::container):
6206         Conditionally initialize.
6207         (back_insert_iterator::difference_type): Conditionally define.
6208         (back_insert_iterator::back_insert_iterator): Conditionally define this
6209         default constructor.
6210         (front_insert_iterator::container): Conditionally initialize.
6211         (front_insert_iterator::difference_type): Conditionally define.
6212         (front_insert_iterator::front_insert_iterator): Conditionally define
6213         this default constructor.
6214         * 24_iterators/back_insert_iterator/pr93884.cc: New test.
6215         * 24_iterators/front_insert_iterator/pr93884.cc: New test.
6216
6217         P0769R2 Add shift to <algorithm>
6218         * include/bits/ranges_algo.h (shift_left, shift_right): New.
6219         * testsuite/25_algorithms/shift_left/1.cc: New test.
6220         * testsuite/25_algorithms/shift_right/1.cc: New test.
6221
6222 2020-02-24  Jonathan Wakely  <jwakely@redhat.com>
6223
6224         * include/bits/stream_iterator.h (istream_iterator(default_sentinel_t)):
6225         Make noexcept-specifier conditional.
6226         * testsuite/24_iterators/istream_iterator/cons/sentinel.cc: Check
6227         noexcept-specifier.
6228
6229         * include/bits/stream_iterator.h (istream_iterator(default_sentinel_t)):
6230         Add constructor.
6231         (operator==(istream_iterator, default_sentinel_t)): Add operator.
6232         (ostream_iterator::difference_type): Define to ptrdiff_t for C++20.
6233         * include/bits/streambuf_iterator.h
6234         (istreambuf_iterator(default_sentinel_t)): Add constructor.
6235         (operator==(istreambuf_iterator, default_sentinel_t)): Add operator.
6236         * testsuite/24_iterators/istream_iterator/cons/sentinel.cc:
6237         New test.
6238         * testsuite/24_iterators/istream_iterator/sentinel.cc: New test.
6239         * testsuite/24_iterators/istreambuf_iterator/cons/sentinel.cc:
6240         New test.
6241         * testsuite/24_iterators/istreambuf_iterator/sentinel.cc: New test.
6242
6243         * include/std/ranges (__deep_const_range, __enable_view_impl): Remove.
6244         (ranges::enable_view): Simplify (LWG 3326).
6245         * include/bits/range_access.h (ranges::enable_view): Declare.
6246         * include/bits/regex.h (__enable_view_impl): Remove partial
6247         specialization.
6248         * include/bits/stl_multiset.h (__enable_view_impl): Likewise.
6249         * include/bits/stl_set.h (__enable_view_impl): Likewise.
6250         * include/bits/unordered_set.h (__enable_view_impl): Likewise.
6251         * include/debug/multiset.h (__enable_view_impl): Likewise.
6252         * include/debug/set.h (__enable_view_impl): Likewise.
6253         * include/debug/unordered_set (__enable_view_impl): Likewise.
6254         * include/experimental/string_view (ranges::enable_view): Define
6255         partial specialization.
6256         * include/std/span (ranges::enable_view): Likewise.
6257         * include/std/string_view (ranges::enable_view): Likewise.
6258         * testsuite/std/ranges/view.cc: Check satisfaction of updated concept.
6259
6260 2020-02-21  Jonathan Wakely  <jwakely@redhat.com>
6261
6262         * include/std/optional (operator<=>(optional<T>, optional<U>))
6263         (operator<=>(optional<T>, nullopt), operator<=>(optional<T>, U)):
6264         Define for C++20.
6265         * include/std/tuple (__tuple_cmp): New helper function for <=>.
6266         (operator<=>(tuple<T...>, tuple<U>...)): Define for C++20.
6267         * include/std/variant (operator<=>(variant<T...>, variant<T...>))
6268         (operator<=>(monostate, monostate)): Define for C++20.
6269         * testsuite/20_util/optional/relops/three_way.cc: New test.
6270         * testsuite/20_util/tuple/comparison_operators/three_way.cc: New test.
6271         * testsuite/20_util/variant/89851.cc: Move to ...
6272         * testsuite/20_util/variant/relops/89851.cc: ... here.
6273         * testsuite/20_util/variant/90008.cc: Move to ...
6274         * testsuite/20_util/variant/relops/90008.cc: ... here.
6275         * testsuite/20_util/variant/relops/three_way.cc: New test.
6276
6277 2020-02-20  Patrick Palka  <ppalka@redhat.com>
6278
6279         * include/std/ranges (views::__adaptor::__maybe_refwrap): New utility
6280         function.
6281         (views::__adaptor::_RangeAdaptor::operator()): Add comments.  Use
6282         __maybe_refwrap to capture lvalue references by reference, and then use
6283         unwrap_reference_t to forward the by-reference captures as references.
6284         * testsuite/std/ranges/adaptors/split.cc: Augment test.
6285         * testsuite/std/ranges/adaptors/split_neg.cc: New test.
6286
6287         * include/std/ranges (iota_view): Forward declare _Sentinel.
6288         (iota_view::_Iterator): Befriend _Sentinel.
6289         (iota_view::_Sentinel::_M_equal): New member function.
6290         (iota_view::_Sentinel::operator==): Use it.
6291         (views::_Iota::operator()): Forward __f using the correct type.
6292         * testsuite/std/ranges/access/ssize.cc (test06): Don't call views::iota
6293         with integers of different signedness, to appease iota_view's deduction
6294         guide.
6295         * testsuite/std/ranges/iota/iota_view.cc: Augment test.
6296
6297 2020-02-20  Jonathan Wakely  <jwakely@redhat.com>
6298
6299         * include/bits/range_access.h (ranges::begin): Reject array of
6300         incomplete type.
6301         (ranges::end, ranges::size): Require arrays to be bounded.
6302         (ranges::data): Require lvalue or borrowed_range.
6303         (ranges::iterator_t): Remove constraint.
6304         * testsuite/std/ranges/access/begin.cc: Do not check array of
6305         incomplete type.
6306         * testsuite/std/ranges/access/begin_neg.cc: New test.
6307         * testsuite/std/ranges/access/end_neg.cc: Adjust expected error.
6308         * testsuite/std/ranges/access/size_neg.cc: Adjust expected error.
6309         * testsuite/std/ranges/access/ssize.cc: Do not check array of
6310         incomplete type.
6311
6312         * include/std/system_error (error_category::operator<=>)
6313         (operator<=>(const error_code&, const error_code&))
6314         (operator<=>(const error_condition&, const error_condition&)): Define
6315         for C++20.
6316         * testsuite/19_diagnostics/error_category/operators/less.cc: New test.
6317         * testsuite/19_diagnostics/error_category/operators/three_way.cc: New
6318         test.
6319         * testsuite/19_diagnostics/error_code/operators/equal.cc: Remove
6320         incorrect comment.
6321         * testsuite/19_diagnostics/error_code/operators/less.cc: New test.
6322         * testsuite/19_diagnostics/error_code/operators/not_equal.cc: Remove
6323         incorrect comment.
6324         * testsuite/19_diagnostics/error_code/operators/three_way.cc: New test.
6325         * testsuite/19_diagnostics/error_condition/operators/equal.cc: Remove
6326         incorrect comment.
6327         * testsuite/19_diagnostics/error_condition/operators/less.cc: New test.
6328         * testsuite/19_diagnostics/error_condition/operators/not_equal.cc:
6329         Remove incorrect comment.
6330         * testsuite/19_diagnostics/error_condition/operators/three_way.cc: New
6331         test.
6332
6333         * libsupc++/typeinfo (type_info::operator!=): Remove for C++20.
6334
6335         * include/std/thread (thread::id::operator<=>): Define for C++20.
6336         * testsuite/30_threads/thread/id/70294.cc: Do not take addresses of
6337         functions in namespace std.
6338         * testsuite/30_threads/thread/id/operators_c++20.cc: New test.
6339
6340 2020-02-19  Patrick Palka  <ppalka@redhat.com>
6341
6342         * testsuite/std/ranges/adaptors/split.cc (test03): Don't include the
6343         null terminator of the underlying string as part of the test_range.
6344         (main): Call test03.
6345
6346 2020-02-19  Jonathan Wakely  <jwakely@redhat.com>
6347
6348         * include/bits/stl_iterator.h (common_iterator): Add copyable<I>
6349         requirement (LWG 3385).
6350         * testsuite/24_iterators/headers/iterator/synopsis_c++20.cc: Adjust
6351         expected declaration.
6352
6353         * include/std/ranges (take_while_view, drop_view, drop_while_view)
6354         (elements_view:_Iterator): Initialize data members (LWG 3364).
6355
6356         * libsupc++/compare (three_way_comparable): Remove always-false check
6357         that should have been removed with weak_equality (P1959R0).
6358         (three_way_comparable_with): Likewise. Reorder requirements (LWG 3360).
6359
6360         * include/std/concepts (__detail::__partially_ordered_with): Move here
6361         from <compare>.
6362         (totally_ordered, totally_ordered_with): Use __partially_ordered_with
6363         to simplify definition (LWG 3331).
6364         * libsupc++/compare (__detail::__partially_ordered_with): Move to
6365         <concepts>.
6366
6367         * include/std/concepts (totally_ordered_with): Remove redundant
6368         requirement (LWG 3329).
6369
6370         * include/std/ranges (__detail::__convertible_to_non_slicing): New
6371         helper concept.
6372         (__detail::__pair_like_convertible_to): Remove.
6373         (__detail::__pair_like_convertible_from): Add requirements for
6374         non-slicing conversions.
6375         (subrange): Constrain constructors with __convertible_to_non_slicing.
6376         Remove constructors from pair-like types. Add new deduction guide.
6377         * testsuite/std/ranges/subrange/lwg3282_neg.cc: New test.
6378
6379         * include/bits/iterator_concepts.h (iter_move): Add declaration to
6380         prevent unqualified lookup finding a suitable declaration (LWG 3247).
6381
6382         * include/std/memory_resource (polymorphic_allocator::allocate)
6383         (polymorphic_allocator::allocate_object): Change type of exception to
6384         bad_array_new_length (LWG 3237).
6385         * testsuite/20_util/polymorphic_allocator/lwg3237.cc: New test.
6386
6387         * include/std/type_traits (__cpp_lib_unwrap_ref): Define (LWG 3348).
6388         * include/std/version (__cpp_lib_unwrap_ref): Likewise.
6389         * testsuite/20_util/unwrap_reference/1.cc: Check macro.
6390         * testsuite/20_util/unwrap_reference/3.cc: New test.
6391
6392         * include/std/numeric (midpoint(T8, T*)): Do not check for complete
6393         type during overload resolution, use static assert instead (LWG 3200).
6394         * testsuite/26_numerics/midpoint/pointer.cc: Do not test with
6395         incomplete type.
6396         * testsuite/26_numerics/midpoint/pointer_neg.cc: New test.
6397
6398         * include/std/span (span(T (&)[N])): Use non-deduced context to
6399         prevent first parameter from interfering with class template argument
6400         deduction (LWG 3369).
6401         * testsuite/23_containers/span/deduction.cc: Add missing 'const'.
6402         * testsuite/23_containers/span/lwg3255.cc: Check for construction from
6403         rvalues.
6404
6405         * include/std/span (span::const_iterator, span::const_reverse_iterator)
6406         (span::cbegin(), span::cend(), span::crbegin(), span::crend()):
6407         Remove (LWG 3320).
6408         * testsuite/23_containers/span/everything.cc: Replace uses of cbegin
6409         and cend.
6410         * testsuite/20_util/specialized_algorithms/destroy/constrained.cc:
6411         Likewise.
6412         * testsuite/20_util/specialized_algorithms/uninitialized_copy/
6413         constrained.cc: Likewise.
6414         * testsuite/20_util/specialized_algorithms/
6415         uninitialized_default_construct/constrained.cc: Likewise.
6416         * testsuite/20_util/specialized_algorithms/uninitialized_fill/
6417         constrained.cc: Likewise.
6418         * testsuite/20_util/specialized_algorithms/uninitialized_move/
6419         constrained.cc: Likewise.
6420         * testsuite/20_util/specialized_algorithms/
6421         uninitialized_value_construct/constrained.cc: Likewise.
6422
6423         * include/bits/range_access.h (range_size_t): Define alias template.
6424         * include/std/ranges (all_view): Rename to views::all_t (LWG 3335).
6425         * testsuite/std/ranges/adaptors/filter.cc: Adjust to new name.
6426
6427         * include/std/ranges (filter_view, transform_view, take_view)
6428         (join_view, split_view, reverse_view): Remove commented-out converting
6429         constructors (LWG 3280).
6430
6431         * include/std/memory (uninitialized_construct_using_allocator): Use
6432         std::construct_at (LWG 3321).
6433
6434         * include/std/memory_resource (polymorphic_allocator::allocate_bytes)
6435         (polymorphic_allocator::allocate_object)
6436         (polymorphic_allocator::new_object): Add nodiscard attribute (LWG3304).
6437
6438         LWG 3379. "safe" in several library names is misleading
6439         * include/bits/range_access.h (enable_safe_range): Rename to
6440         enable_borrowed_range.
6441         (__detail::__maybe_safe_range): Rename to __maybe_borrowed_range.
6442         (safe_range): Rename to borrowed_range.
6443         * include/bits/ranges_algo.h: Adjust to use new names.
6444         * include/bits/ranges_algobase.h: Likewise.
6445         * include/bits/ranges_uninitialized.h: Likewise.
6446         * include/std/ranges: Likewise.
6447         (safe_iterator_t): Rename to borrowed_iterator_t.
6448         (safe_subrange_t): Rename to borrowed_subrange_t.
6449         * include/std/span: Adjust to use new names.
6450         * include/std/string_view: Likewise.
6451         * include/experimental/string_view: Likewise.
6452         * testsuite/std/ranges/access/begin.cc: Likewise.
6453         * testsuite/std/ranges/access/cbegin.cc: Likewise.
6454         * testsuite/std/ranges/access/cdata.cc: Likewise.
6455         * testsuite/std/ranges/access/cend.cc: Likewise.
6456         * testsuite/std/ranges/access/crbegin.cc: Likewise.
6457         * testsuite/std/ranges/access/crend.cc: Likewise.
6458         * testsuite/std/ranges/access/data.cc: Likewise.
6459         * testsuite/std/ranges/access/end.cc: Likewise.
6460         * testsuite/std/ranges/access/rbegin.cc: Likewise.
6461         * testsuite/std/ranges/access/rend.cc: Likewise.
6462         * testsuite/std/ranges/safe_range.cc: Likewise.
6463         * testsuite/std/ranges/safe_range_types.cc: Likewise.
6464         * testsuite/util/testsuite_iterators.h: Likewise.
6465
6466         * include/std/ranges (tuple_element<0, const subrange<I, S, K>>)
6467         (tuple_element<1, const subrange<I, S, K>>): Add partial
6468         specializations (LWG 3398).
6469         * testsuite/std/ranges/subrange/tuple_like.cc: New test.
6470
6471         * include/bits/ranges_algo.h (__find_fn, __find_first_of_fn)
6472         (__adjacent_find_fn, __remove_if_fn, __remove_copy_if_fn)
6473         (__unique_fn, __unique_copy_fn): Remove redundant conversions to bool.
6474
6475 2020-02-18  Patrick Palka  <ppalka@redhat.com>
6476
6477         P1983R0 Wording for GB301, US296, US292, US291, and US283
6478         * include/std/ranges (filter_view::pred): New member function.
6479         (join_view::_Iterator::_Iterator): Remove now-redundant comment since
6480         P1983R0 fixes the highlighted issue in the same way.
6481         (join_view::_Iterator<_Const>): Add friend
6482         join_view::_Iterator<!_Const>.
6483         (join_view::_M_inner): Remove mutable specifier, effectively reverting
6484         the proposed wording changes of P3278.
6485         (join_view::begin): Refine the condition for when to return a const
6486         iterator.
6487         (split_view::_OuterIter::_OuterIter): Adjust constraints.
6488         * testsuite/std/ranges/adaptors/filter.cc: Test that filter_view::pred
6489         exists and works.
6490
6491 2020-02-18  Jonathan Wakely  <jwakely@redhat.com>
6492
6493         PR libstdc++/93818
6494         * include/std/ranges (_RangeAdaptor): Add deduction guide.
6495         (filter_view::_Iterator): Add alias _Vp_iter and use in place of
6496         iterator_t<_Vp>.
6497         (filter_view::_Iterator::_S_iter_cat()): Add 'typename'.
6498         (transform_view::_Iterator): Add alias _Base_iter and use in place of
6499         iterator_t<_Base>.
6500         (transform_view::_Iterator::_S_iter_cat()): Add 'typename'.
6501         (join_view::_Iterator): Add _Outer_iter and _Inner_iter aliases.
6502         (join_view::_Iterator::_S_iter_cat()): Add 'typename'.
6503         (split_view::_InnerIter::_S_iter_cat()): Likewise.
6504
6505         * testsuite/20_util/integer_comparisons/equal.cc: Fix invalid
6506         assumption that long is wider than int.
6507         * testsuite/20_util/integer_comparisons/greater_equal.cc: Likewise.
6508         * testsuite/20_util/integer_comparisons/less.cc: Likewise.
6509         * testsuite/20_util/integer_comparisons/less_equal.cc: Likewise.
6510         * testsuite/20_util/integer_comparisons/not_equal.cc: Likewise.
6511
6512         P1976R2 Fixed-size span construction from dynamic range
6513         * include/std/span (__cpp_lib_span): Update value.
6514         (span(It, size_type), span(It, End)): Make conditionally explicit. Add
6515         assertion.
6516         (span(R&&), span(const span<OType, OExtent>&)): Likewise and relax
6517         constraints.
6518         (span::first<Count>(), span::last<Count>()): Use explicit type in
6519         return statement.
6520         (as_bytes, as_writable_bytes): Likewise.
6521         * include/std/version (__cpp_lib_span): Update value.
6522         * testsuite/23_containers/span/1.cc: Check new value.
6523         * testsuite/23_containers/span/2.cc: Check new value.
6524         * testsuite/23_containers/span/explicit.cc: New test.
6525
6526         * include/std/span (span::__is_compatible_array): Simplify alias
6527         template by using requires-clause.
6528         (span::__is_compatible_ref): New alias template for constraining
6529         constructors.
6530         (span::__is_compatible_iterator, span::__is_compatible_range): Remove.
6531         (span(It, size_type), span(It, End)): Use __is_compatible_ref.
6532         (span(T(&)[N], span(array<T, N>&), span(const array<T, N>&)): Remove
6533         redundant parentheses.
6534         (span(R&&)): Add missing constraints.
6535
6536         * include/std/span (span): Reorder members and rename template
6537         parameters to match declarations in the C++2a working paper.
6538
6539         P2116R0 Remove tuple-like protocol support from fixed-extent span
6540         * include/std/span (get, tuple_size, tuple_element): Remove.
6541         * testsuite/23_containers/span/everything.cc: Remove checks for
6542         tuple-like API.
6543         * testsuite/23_containers/span/get_neg.cc: Remove.
6544         * testsuite/23_containers/span/tuple_element_dynamic_neg.cc: Remove.
6545         * testsuite/23_containers/span/tuple_element_oob_neg.cc: Remove.
6546         * testsuite/23_containers/span/tuple_size_neg.cc: Remove.
6547
6548 2020-02-17  Patrick Palka  <ppalka@redhat.com>
6549
6550         P2106R0 Alternative wording for GB315 and GB316
6551         * include/bits/ranges_algo.h (in_fun_result): New.
6552         (for_each_result, for_each_n_result): Change into an alias of
6553         in_fun_result.
6554         (in_in_result): New.
6555         (mismatch_result): Change into an alias of in_in_result.
6556         (copy_if_result): Change into an alias of in_out_result.
6557         (swap_ranges_result): Change into an alias of in_in_result.
6558         (unary_transform_result): Change into an alias of in_out_result.
6559         (in_in_out_result): New.
6560         (binary_transform_result): Change into an alias of in_in_out_result.
6561         (replace_copy_result, replace_copy_if_result, remove_copy_if_result,
6562         remove_copy_result, unique_copy_result, reverse_copy_result,
6563         rotate_copy_result, partial_sort_copy_result): Change into an alias of
6564         in_out_result.
6565         (in_out_out_result): New.
6566         (partition_copy_result, merge_result): Change into an alias of
6567         in_out_out_result.
6568         (set_union_result, set_intersection_result): Change into an alias of
6569         in_in_out_result.
6570         (set_difference_result): Change into an alias of in_out_result.
6571         (set_symmetric_difference): Change into an alias of in_in_out_result.
6572         (min_max_result): New.
6573         (minmax_result, minmax_element_result): Change into an alias of
6574         min_max_result.
6575         (in_found_result): New.
6576         (next_permutation_result, prev_permutation_result): Change into an alias
6577         of in_found_result.
6578         (__next_permutation_fn::operator(), __prev_permutation_fn::operator()):
6579         Adjust following changes to next_permutation_result and
6580         prev_permutation_result.
6581         * include/bits/ranges_algobase.h (in_out_result): New.
6582         (copy_result, move_result, move_backward_result, copy_backward_result,
6583         copy_n_result): Change into an alias of in_out_result.
6584         * include/bits/ranges_uninitialized.h (uninitialized_copy_result,
6585         uninitialized_copy_n_result, uninitialized_move_result,
6586         uninitialized_move_n_result): Likewise.
6587         * testsuite/25_algorithms/next_permutation/constrained.cc: Adjust uses of
6588         structured bindings.
6589         * testsuite/25_algorithms/prev_permutation/constrained.cc: Likewise.
6590
6591         P1243R4 Rangify new algorithms
6592         * include/bits/ranges_algo.h (for_each_n_result, __for_each_n_fn,
6593         for_each_n, __sample_fn, sample, __clamp_fn, clamp): New.
6594         * testsuite/25_algorithms/clamp/constrained.cc: New test.
6595         * testsuite/25_algorithms/for_each/constrained.cc: Augment test.
6596         * testsuite/25_algorithms/sample/constrained.cc: New test.
6597
6598 2020-02-17  Jonathan Wakely  <jwakely@redhat.com>
6599
6600         P1964R2 Wording for boolean-testable
6601         * include/bits/ranges_algo.h (__find_fn, __find_first_of_fn)
6602         (__adjacent_find_fn): Cast result of predicate to bool.
6603         * include/std/concepts (__boolean): Remove.
6604         (__detail::__boolean_testable_impl, __detail::__boolean_testable): Add
6605         new helper concepts.
6606         (__detail::__weakly_eq_cmp_with, totally_ordered, totally_ordered_with)
6607         (predicate): Use __boolean_testable instead of boolean.
6608         * libsupc++/compare (__detail::__partially_ordered, _Synth3way):
6609         Likewise.
6610
6611         P1970R2 Consistency for size() functions: Add ranges::ssize
6612         * include/bits/range_access.h (_SSize, ssize): Define for C++20.
6613         * testsuite/std/ranges/access/ssize.cc: New test.
6614
6615         P1956R1 On the names of low-level bit manipulation functions
6616         * include/bits/hashtable_policy.h: Update comment.
6617         * include/std/bit (__ispow2, __ceil2, __floor2, __log2p1): Rename.
6618         (ispow2, ceil2, floor2, log2p1): Likewise.
6619         (__cpp_lib_int_pow2): Add feature test macro.
6620         * include/std/charconv (__to_chars_len_2): Adjust use of __log2p1.
6621         * include/std/memory (assume_aligned): Adjust use of ispow2.
6622         * include/std/version (__cpp_lib_int_pow2): Add.
6623         * libsupc++/new_opa.cc: Adjust use of __ispow2.
6624         * src/c++17/memory_resource.cc: Likewise, and for __ceil2 and __log2p1.
6625         * testsuite/17_intro/freestanding.cc: Adjust use of ispow2.
6626         * testsuite/26_numerics/bit/bit.pow.two/ceil2.cc: Rename to ...
6627         * testsuite/26_numerics/bit/bit.pow.two/bit_ceil.cc: ... here.
6628         * testsuite/26_numerics/bit/bit.pow.two/ceil2_neg.cc: Rename to ...
6629         * testsuite/26_numerics/bit/bit.pow.two/bit_ceil_neg.cc: ... here.
6630         * testsuite/26_numerics/bit/bit.pow.two/floor2.cc: Rename to ...
6631         * testsuite/26_numerics/bit/bit.pow.two/bit_floor.cc: ... here.
6632         * testsuite/26_numerics/bit/bit.pow.two/log2p1.cc: Rename to ...
6633         * testsuite/26_numerics/bit/bit.pow.two/bit_width.cc: ... here.
6634         * testsuite/26_numerics/bit/bit.pow.two/ispow2.cc: Rename to ...
6635         * testsuite/26_numerics/bit/bit.pow.two/has_single_bit.cc: ... here.
6636
6637         * include/std/charconv: Add comment.
6638
6639         PR libstdc++/92546 (partial)
6640         * include/bits/random.h (uniform_random_bit_generator): Move definition
6641         to <bits/uniform_int_dist.h>.
6642         * include/bits/ranges_algo.h: Include <bits/uniform_int_dist.h> instead
6643         of <bits/random.h>.
6644         * include/bits/ranges_algobase.h: Do not include <cmath>.
6645         * include/bits/uniform_int_dist.h (uniform_random_bit_generator):
6646         Move here.
6647         * include/std/ranges: Do not include <limits>.
6648         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error lineno.
6649
6650         PR libstdc++/92546 (partial)
6651         * include/Makefile.am: Add new header.
6652         * include/Makefile.in: Regenerate.
6653         * include/bits/int_limits.h: New header.
6654         * include/bits/parse_numbers.h (__select_int::_Select_int): Replace
6655         numeric_limits with __detail::__int_limits.
6656         * include/std/bit (__rotl, __rotr, __countl_zero, __countl_one)
6657         (__countr_zero, __countr_one, __popcount, __ceil2, __floor2, __log2p1):
6658         Likewise.
6659         * include/std/charconv (__to_chars_8, __from_chars_binary)
6660         (__from_chars_alpha_to_num, from_chars): Likewise.
6661         * include/std/memory_resource (polymorphic_allocator::allocate)
6662         (polymorphic_allocator::allocate_object): Likewise.
6663         * include/std/string_view (basic_string_view::_S_compare): Likewise.
6664         * include/std/utility (in_range): Likewise.
6665         * testsuite/20_util/integer_comparisons/in_range_neg.cc: Adjust for
6666         extra error about incomplete type __int_limits<bool>.
6667         * testsuite/26_numerics/bit/bit.count/countl_one.cc: Include <limits>.
6668         * testsuite/26_numerics/bit/bit.count/countl_zero.cc: Likewise.
6669         * testsuite/26_numerics/bit/bit.count/countr_one.cc: Likewise.
6670         * testsuite/26_numerics/bit/bit.count/countr_zero.cc: Likewise.
6671         * testsuite/26_numerics/bit/bit.count/popcount.cc: Likewise.
6672         * testsuite/26_numerics/bit/bit.pow.two/ceil2_neg.cc: Likewise.
6673         * testsuite/26_numerics/bit/bit.pow.two/ceil2.cc: Likewise.
6674         * testsuite/26_numerics/bit/bit.pow.two/floor2.cc: Likewise.
6675         * testsuite/26_numerics/bit/bit.pow.two/ispow2.cc: Likewise.
6676         * testsuite/26_numerics/bit/bit.pow.two/log2p1.cc: Likewise.
6677         * testsuite/26_numerics/bit/bit.rotate/rotl.cc: Likewise.
6678         * testsuite/26_numerics/bit/bit.rotate/rotr.cc: Likewise.
6679
6680         * python/libstdcxx/v6/printers.py (StdCmpCatPrinter.to_string): Update
6681         value for partial_ordering::unordered.
6682
6683         * include/bits/iterator_concepts.h (indirectly_copyable_storable): Add
6684         const-qualified expression variations.
6685         * include/std/concepts (copyable): Likewise.
6686
6687         * include/std/type_traits (__is_standard_integer): New helper trait.
6688         * include/std/utility (cmp_equal, cmp_not_equal, cmp_less, cmp_greater)
6689         (cmp_less_equal, cmp_greater_equal, in_range): Define for C++20.
6690         * include/std/version (__cpp_lib_integer_comparison_functions): Define.
6691         * testsuite/20_util/integer_comparisons/1.cc: New test.
6692         * testsuite/20_util/integer_comparisons/2.cc: New test.
6693         * testsuite/20_util/integer_comparisons/equal.cc: New test.
6694         * testsuite/20_util/integer_comparisons/equal_neg.cc: New test.
6695         * testsuite/20_util/integer_comparisons/greater_equal.cc: New test.
6696         * testsuite/20_util/integer_comparisons/greater_equal_neg.cc: New test.
6697         * testsuite/20_util/integer_comparisons/greater_neg.cc: New test.
6698         * testsuite/20_util/integer_comparisons/in_range.cc: New test.
6699         * testsuite/20_util/integer_comparisons/in_range_neg.cc: New test.
6700         * testsuite/20_util/integer_comparisons/less.cc: New test.
6701         * testsuite/20_util/integer_comparisons/less_equal.cc: New test.
6702         * testsuite/20_util/integer_comparisons/less_equal_neg.cc: New test.
6703         * testsuite/20_util/integer_comparisons/less_neg.cc: New test.
6704         * testsuite/20_util/integer_comparisons/not_equal.cc: New test.
6705         * testsuite/20_util/integer_comparisons/not_equal_neg.cc: New test.
6706
6707 2020-02-16  Patrick Palka  <ppalka@redhat.com>
6708
6709         * include/bits/ranges_algo.h (__lexicographical_compare_fn::operator()):
6710         Move code after an early exit constexpr if to under an else branch.
6711         * include/bits/ranges_algobase.h (__equal_fn::operator()): Likewise.
6712
6713 2020-02-15  Patrick Palka  <ppalka@redhat.com>
6714
6715         * include/bits/ranges_algo.h: Adjust whitespace and formatting.
6716         * include/bits/ranges_algobase.h: Likewise.
6717         * include/bits/ranges_uninitialized.h: Likewise.
6718
6719         * include/bits/ranges_algo.h: (adjacent_find, all_of, any_of,
6720         binary_search, copy_if, count, count_if, equal_range, find, find_end,
6721         find_first_of, find_if, find_if_not, for_each, generate, generate_n,
6722         includes, inplace_merge, is_heap, is_heap_until, is_partitioned,
6723         is_permutation, is_sorted, is_sorted_until, lexicographical_compare,
6724         lower_bound, make_heap, max, max_element, merge, min, min_element,
6725         minmax, minmax_element, mismatch, next_permutation, none_of,
6726         nth_element, partial_sort, partial_sort_copy, partition, partition_copy,
6727         partition_point, pop_heap, prev_permutation, push_heap, remove,
6728         remove_copy, remove_copy_if, remove_if, replace, replace_copy,
6729         replace_copy_if, replace_if, reverse, reverse_copy, rotate, rotate_copy,
6730         search, search_n, set_difference, set_intersection,
6731         set_symmetric_difference, set_union, shuffle, sort, sort_heap,
6732         stable_partition, stable_sort, swap_ranges, transform, unique,
6733         unique_copy, upper_bound): Convert into function objects.
6734         * include/bits/ranges_algobase.h: (equal, copy, move, copy_n, fill_n,
6735         fill, move_backward, copy_backward): Likewise.
6736         * include/bits/ranges_uninitialized.h (uninitialized_default_construct,
6737         uninitialized_default_construct_n, uninitialized_value_construct,
6738         uninitialized_value_construct_n, uninitialized_copy,
6739         uninitialized_copy_n, uninitialized_move, uninitialized_move_n,
6740         uninitialized_fill, uninitialized_fill_n, construct_at, destroy_at,
6741         destroy, destroy_n): Likewise.
6742
6743         * include/bits/ranges_algo.h (ranges::__find_end): Fold into ...
6744         (ranges::find_end): ... here.
6745         (ranges::__lexicographical_compare): Fold into ...
6746         (ranges::lexicographical_compare): ... here.
6747         * include/bits/ranges_algobase.h (ranges::__equal): Fold into ...
6748         (ranges::equal): ... here.
6749
6750 2020-02-15  Jonathan Wakely  <jwakely@redhat.com>
6751
6752         * include/bits/erase_if.h (__cpp_lib_erase_if): Define to 202002L.
6753         * include/std/deque: Likewise.
6754         * include/std/forward_list: Likewise.
6755         * include/std/list: Likewise.
6756         * include/std/string: Likewise.
6757         * include/std/vector: Likewise.
6758         * include/std/version: Likewise.
6759         * testsuite/23_containers/deque/erasure.cc: Test for new value.
6760         * testsuite/23_containers/forward_list/erasure.cc: Likewise.
6761         * testsuite/23_containers/list/erasure.cc: Likewise.
6762         * testsuite/23_containers/map/erasure.cc: Likewise.
6763         * testsuite/23_containers/set/erasure.cc: Likewise.
6764         * testsuite/23_containers/unordered_map/erasure.cc: Likewise.
6765         * testsuite/23_containers/unordered_set/erasure.cc: Likewise.
6766         * testsuite/23_containers/vector/erasure.cc: Likewise.
6767
6768 2020-02-15  Jonathan Wakely  <jwakely@redhat.com>
6769
6770         * include/bits/random.h (uniform_random_bit_generator): Require min()
6771         and max() to be constant expressions and min() to be less than max().
6772         * testsuite/26_numerics/random/concept.cc: Check additional cases.
6773         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error lineno.
6774
6775 2020-02-13  Patrick Palka  <ppalka@redhat.com>
6776
6777         * include/Makefile.am: Add <bits/ranges_uninitialized.h>.
6778         * include/Makefile.in: Regenerate.
6779         * include/bits/ranges_uninitialized.h: New header.
6780         * include/std/memory: Include it.
6781         * testsuite/20_util/specialized_algorithms/destroy/constrained.cc: New
6782         test.
6783         * .../uninitialized_copy/constrained.cc: New test.
6784         * .../uninitialized_default_construct/constrained.cc: New test.
6785         * .../uninitialized_fill/constrained.cc: New test.
6786         * .../uninitialized_move/constrained.cc: New test.
6787         * .../uninitialized_value_construct/constrained.cc: New test.
6788
6789         * include/Makefile.am: Add bits/ranges_algobase.h
6790         * include/Makefile.in: Regenerate.
6791         * bits/ranges_algo.h: Include <bits/ranges_algobase.h> and refactor
6792         existing #includes.
6793         (__detail::__is_normal_iterator, __detail::is_reverse_iterator,
6794         __detail::__is_move_iterator, copy_result, move_result,
6795         __equal, equal, copy_result, move_result, move_backward_result,
6796         copy_backward_result, __copy_or_move_backward, __copy_or_move, copy,
6797         move, copy_backward, move_backward, copy_n_result, copy_n, fill_n,
6798         fill): Split out into ...
6799         * bits/range_algobase.h: ... this new header.
6800
6801 2020-02-12  Patrick Palka  <ppalka@redhat.com>
6802
6803         LWG 3389 and LWG 3390
6804         * include/bits/stl_iterator.h (move_move_iterator): Use std::move when
6805         constructing the move_iterator with __i.
6806         (counted_iterator::counted_iterator): Use std::move when initializing
6807         M_current with __i.
6808         * testsuite/24_iterators/counted_iterator/lwg3389.cc: New test.
6809         * testsuite/24_iterators/move_iterator/lwg3390.cc: New test.
6810
6811 2020-02-12  Sandra Loosemore  <sandra@codesourcery.com>
6812
6813         PR libstdc++/79193
6814         PR libstdc++/88999
6815
6816         * configure: Regenerated.
6817
6818 2020-02-12  François Dumont  <fdumont@gcc.gnu.org>
6819
6820         * include/bits/hashtable.h
6821         (_Hashtable<>(_Hashtable&&, std::allocator_type&)): Add
6822         missing std namespace qualification to forward call.
6823
6824 2020-02-09  Jonathan Wakely  <jwakely@redhat.com>
6825
6826         * testsuite/20_util/function_objects/range.cmp/equal_to.cc: Fix
6827         comment.
6828         * testsuite/20_util/function_objects/range.cmp/less.ccL Likewise.
6829
6830         * include/std/ranges: Fix non-ASCII characters in comment.
6831
6832         * include/bits/range_cmp.h (__detail::__eq_builtin_ptr_cmp): Require
6833         equality comparison to be valid and return bool.
6834         (__detail::__less_builtin_ptr_cmp): Likewise for less-than comparison.
6835         * testsuite/20_util/function_objects/range.cmp/equal_to.cc: Check
6836         type with ambiguous conversion to fundamental types.
6837         * testsuite/20_util/function_objects/range.cmp/less.cc: Likewise.
6838
6839 2020-02-07  Jonathan Wakely  <jwakely@redhat.com>
6840
6841         * include/bits/iterator_concepts.h (iter_difference_t, iter_value_t):
6842         Use remove_cvref_t.
6843         (readable_traits): Rename to indirectly_readable_traits.
6844         (readable): Rename to indirectly_readable.
6845         (writable): Rename to indirectly_writable.
6846         (__detail::__iter_exchange_move): Do not use remove_reference_t.
6847         (indirectly_swappable): Adjust requires expression parameter types.
6848         expression.
6849         * include/bits/ranges_algo.h (ranges::transform, ranges::replace)
6850         (ranges::replace_if, ranges::generate_n, ranges::generate)
6851         (ranges::remove): Use new name for writable.
6852         * include/bits/stl_iterator.h (__detail::__common_iter_has_arrow):
6853         Use new name for readable.
6854         * include/ext/pointer.h (readable_traits<_Pointer_adapter<P>>): Use
6855         new name for readable_traits.
6856         * testsuite/24_iterators/associated_types/readable.traits.cc: Likewise.
6857         * testsuite/24_iterators/indirect_callable/projected.cc: Adjust for
6858         new definition of indirectly_readable.
6859
6860         * include/bits/stl_iterator.h (__detail::__common_iter_ptr): Change
6861         to take parameters of common_iterator, instead of the common_iterator
6862         type itself. Fix argument for __common_iter_has_arrow constraint.
6863         (iterator_traits<common_iterator<I, S>>::pointer): Adjust.
6864
6865 2020-02-07  Jonathan Wakely  <jwakely@redhat.com>
6866
6867         * include/std/ranges (iota_view): Add braces to prevent -Wempty-body
6868         warning.
6869         (basic_istream_view::_Iterator::operator++()): Add missing return.
6870
6871 2020-02-07  Patrick Palka  <ppalka@redhat.com>
6872
6873         * include/bits/ranges_algo.h: Remove extraneous &&.
6874
6875         * include/std/ranges (ranges::__detail::__stream_extractable,
6876         ranges::basic_istream_view, ranges::istream_view): Define.
6877         * testsuite/std/ranges/istream_view: New test.
6878
6879         Implement C++20 range adaptors
6880         * include/std/ranges: Include <bits/refwrap.h> and <tuple>.
6881         (subrange::_S_store_size): Mark as const instead of constexpr to
6882         avoid what seems to be a bug in GCC.
6883         (__detail::__box): Give it defaulted copy and move constructors.
6884         (ranges::views::_Single::operator()): Mark constexpr.
6885         (ranges::views::_Iota::operator()): Mark constexpr.
6886         (__detail::Empty): Define.
6887         (ranges::views::__closure::_RangeAdaptor,
6888         ranges::views::__closure::_RangeAdaptorClosure, ref_view, all_view,
6889         ranges::views::all, ranges::__detail::find_if,
6890         ranges::__detail::find_if_not, ranges::__detail::mismatch,
6891         ranges::detail::min, filter_view, ranges::views::filter, transform_view,
6892         ranges::views::transform, take_view, ranges::views::take,
6893         take_while_view, ranges::views::take_while, drop_view,
6894         ranges::views::drop, join_view, ranges::views::join,
6895         __detail::require_constant, __detail::tiny_range, split_view,
6896         ranges::views::split, ranges::views::_Counted, ranges::views::counted,
6897         common_view, ranges::views::common, reverse_view,
6898         ranges::views::reverse,
6899         ranges::views::__detail::__is_reversible_subrange,
6900         ranges::views::__detail::__is_reverse_view, reverse_view,
6901         ranges::views::reverse, __detail::__has_tuple_element, elements_view,
6902         ranges::views::elements, ranges::views::keys, ranges::views::values):
6903         Define.
6904         (views): Alias for ranges::views.
6905         (tuple_size<ranges::subrange<>>, tuple_element<0, ranges::subrange>,
6906         tuple_element<1, ranges::subrange>): New partial specializations.
6907         * testsuite/std/ranges/adaptors/all.cc: New test.
6908         * testsuite/std/ranges/adaptors/common.cc: Likewise.
6909         * testsuite/std/ranges/adaptors/counted.cc: Likewise.
6910         * testsuite/std/ranges/adaptors/drop.cc: Likewise.
6911         * testsuite/std/ranges/adaptors/drop_while.cc: Likewise.
6912         * testsuite/std/ranges/adaptors/elements.cc: Likewise.
6913         * testsuite/std/ranges/adaptors/filter.cc: Likewise.
6914         * testsuite/std/ranges/adaptors/join.cc: Likewise.
6915         * testsuite/std/ranges/adaptors/reverse.cc: Likewise.
6916         * testsuite/std/ranges/adaptors/split.cc: Likewise.
6917         * testsuite/std/ranges/adaptors/take.cc: Likewise.
6918         * testsuite/std/ranges/adaptors/take_while.cc: Likewise.
6919         * testsuite/std/ranges/adaptors/transform.cc: Likewise.
6920
6921 2020-02-07  Jonathan Wakely  <jwakely@redhat.com>
6922
6923         * libsupc++/compare (__cmp_cat::type): Define typedef for underlying
6924         type of enumerations and comparison category types.
6925         (__cmp_cat::_Ord, __cmp_cat::_Ncmp): Add underlying type.
6926         (__cmp_cat::_Ncmp::unordered): Change value to 2.
6927         (partial_ordering::_M_value, weak_ordering::_M_value)
6928         (strong_ordering::_M_value): Change type to __cmp_cat::type.
6929         (partial_ordering::_M_is_ordered): Remove data member.
6930         (partial_ordering): Use second bit of _M_value for unordered. Adjust
6931         comparison operators.
6932         (weak_ordering::operator partial_ordering): Simplify to remove
6933         branches.
6934         (operator<=>(unspecified, weak_ordering)): Likewise.
6935         (strong_ordering::operator partial_ordering): Likewise.
6936         (strong_ordering::operator weak_ordering): Likewise.
6937         (operator<=>(unspecified, strong_ordering)): Likewise.
6938         * testsuite/18_support/comparisons/categories/partialord.cc: New test.
6939         * testsuite/18_support/comparisons/categories/strongord.cc: New test.
6940         * testsuite/18_support/comparisons/categories/weakord.cc: New test.
6941
6942         * include/std/ranges (iota_view::_Iterator): Fix typo in name of
6943         __cpp_lib_three_way_comparison macro and use deduced return type for
6944         operator<=>.
6945         * testsuite/std/ranges/iota/iterator.cc: New test.
6946
6947 2020-02-07  Patrick Palka  <ppalka@redhat.com>
6948             Jonathan Wakely  <jwakely@redhat.com>
6949
6950         Implement C++20 constrained algorithms
6951         * include/Makefile.am: Add new header.
6952         * include/Makefile.in: Regenerate.
6953         * include/std/algorithm: Include <bits/ranges_algo.h>.
6954         * include/bits/ranges_algo.h: New file.
6955         * testsuite/25_algorithms/adjacent_find/constrained.cc: New test.
6956         * testsuite/25_algorithms/all_of/constrained.cc: New test.
6957         * testsuite/25_algorithms/any_of/constrained.cc: New test.
6958         * testsuite/25_algorithms/binary_search/constrained.cc: New test.
6959         * testsuite/25_algorithms/copy/constrained.cc: New test.
6960         * testsuite/25_algorithms/copy_backward/constrained.cc: New test.
6961         * testsuite/25_algorithms/copy_if/constrained.cc: New test.
6962         * testsuite/25_algorithms/copy_n/constrained.cc: New test.
6963         * testsuite/25_algorithms/count/constrained.cc: New test.
6964         * testsuite/25_algorithms/count_if/constrained.cc: New test.
6965         * testsuite/25_algorithms/equal/constrained.cc: New test.
6966         * testsuite/25_algorithms/equal_range/constrained.cc: New test.
6967         * testsuite/25_algorithms/fill/constrained.cc: New test.
6968         * testsuite/25_algorithms/fill_n/constrained.cc: New test.
6969         * testsuite/25_algorithms/find/constrained.cc: New test.
6970         * testsuite/25_algorithms/find_end/constrained.cc: New test.
6971         * testsuite/25_algorithms/find_first_of/constrained.cc: New test.
6972         * testsuite/25_algorithms/find_if/constrained.cc: New test.
6973         * testsuite/25_algorithms/find_if_not/constrained.cc: New test.
6974         * testsuite/25_algorithms/for_each/constrained.cc: New test.
6975         * testsuite/25_algorithms/generate/constrained.cc: New test.
6976         * testsuite/25_algorithms/generate_n/constrained.cc: New test.
6977         * testsuite/25_algorithms/heap/constrained.cc: New test.
6978         * testsuite/25_algorithms/includes/constrained.cc: New test.
6979         * testsuite/25_algorithms/inplace_merge/constrained.cc: New test.
6980         * testsuite/25_algorithms/is_partitioned/constrained.cc: New test.
6981         * testsuite/25_algorithms/is_permutation/constrained.cc: New test.
6982         * testsuite/25_algorithms/is_sorted/constrained.cc: New test.
6983         * testsuite/25_algorithms/is_sorted_until/constrained.cc: New test.
6984         * testsuite/25_algorithms/lexicographical_compare/constrained.cc: New
6985         test.
6986         * testsuite/25_algorithms/lower_bound/constrained.cc: New test.
6987         * testsuite/25_algorithms/max/constrained.cc: New test.
6988         * testsuite/25_algorithms/max_element/constrained.cc: New test.
6989         * testsuite/25_algorithms/merge/constrained.cc: New test.
6990         * testsuite/25_algorithms/min/constrained.cc: New test.
6991         * testsuite/25_algorithms/min_element/constrained.cc: New test.
6992         * testsuite/25_algorithms/minmax/constrained.cc: New test.
6993         * testsuite/25_algorithms/minmax_element/constrained.cc: New test.
6994         * testsuite/25_algorithms/mismatch/constrained.cc: New test.
6995         * testsuite/25_algorithms/move/constrained.cc: New test.
6996         * testsuite/25_algorithms/move_backward/constrained.cc: New test.
6997         * testsuite/25_algorithms/next_permutation/constrained.cc: New test.
6998         * testsuite/25_algorithms/none_of/constrained.cc: New test.
6999         * testsuite/25_algorithms/nth_element/constrained.cc: New test.
7000         * testsuite/25_algorithms/partial_sort/constrained.cc: New test.
7001         * testsuite/25_algorithms/partial_sort_copy/constrained.cc: New test.
7002         * testsuite/25_algorithms/partition/constrained.cc: New test.
7003         * testsuite/25_algorithms/partition_copy/constrained.cc: New test.
7004         * testsuite/25_algorithms/partition_point/constrained.cc: New test.
7005         * testsuite/25_algorithms/prev_permutation/constrained.cc: New test.
7006         * testsuite/25_algorithms/remove/constrained.cc: New test.
7007         * testsuite/25_algorithms/remove_copy/constrained.cc: New test.
7008         * testsuite/25_algorithms/remove_copy_if/constrained.cc: New test.
7009         * testsuite/25_algorithms/remove_if/constrained.cc: New test.
7010         * testsuite/25_algorithms/replace/constrained.cc: New test.
7011         * testsuite/25_algorithms/replace_copy/constrained.cc: New test.
7012         * testsuite/25_algorithms/replace_copy_if/constrained.cc: New test.
7013         * testsuite/25_algorithms/replace_if/constrained.cc: New test.
7014         * testsuite/25_algorithms/reverse/constrained.cc: New test.
7015         * testsuite/25_algorithms/reverse_copy/constrained.cc: New test.
7016         * testsuite/25_algorithms/rotate/constrained.cc: New test.
7017         * testsuite/25_algorithms/rotate_copy/constrained.cc: New test.
7018         * testsuite/25_algorithms/search/constrained.cc: New test.
7019         * testsuite/25_algorithms/search_n/constrained.cc: New test.
7020         * testsuite/25_algorithms/set_difference/constrained.cc: New test.
7021         * testsuite/25_algorithms/set_intersection/constrained.cc: New test.
7022         * testsuite/25_algorithms/set_symmetric_difference/constrained.cc: New
7023         test.
7024         * testsuite/25_algorithms/set_union/constrained.cc: New test.
7025         * testsuite/25_algorithms/shuffle/constrained.cc: New test.
7026         * testsuite/25_algorithms/sort/constrained.cc: New test.
7027         * testsuite/25_algorithms/stable_partition/constrained.cc: New test.
7028         * testsuite/25_algorithms/stable_sort/constrained.cc: New test.
7029         * testsuite/25_algorithms/swap_ranges/constrained.cc: New test.
7030         * testsuite/25_algorithms/transform/constrained.cc: New test.
7031         * testsuite/25_algorithms/unique/constrained.cc: New test.
7032         * testsuite/25_algorithms/unique_copy/constrained.cc: New test.
7033         * testsuite/25_algorithms/upper_bound/constrained.cc: New test.
7034
7035 2020-02-06  Jonathan Wakely  <jwakely@redhat.com>
7036
7037         * include/bits/stl_iterator.h (__detail::__common_iter_ptr): Fix PR
7038         number in comment. Fix indentation.
7039
7040         * include/bits/stl_algobase.h (__iter_swap, __iter_swap<true>): Remove
7041         redundant _GLIBCXX20_CONSTEXPR.
7042
7043         * include/std/ranges (viewable_range): Replace decay_t with
7044         remove_cvref_t (LWG 3375).
7045
7046 2020-02-05  Jonathan Wakely  <jwakely@redhat.com>
7047
7048         * include/bits/iterator_concepts.h (iter_reference_t)
7049         (iter_rvalue_reference_t, iter_common_reference_t, indirect_result_t):
7050         Remove workarounds for PR c++/67704.
7051         * testsuite/24_iterators/aliases.cc: New test.
7052
7053 2020-02-05  Patrick Palka  <ppalka@redhat.com>
7054
7055         * include/bits/stl_iterator.h (move_iterator::move_iterator): Move __i
7056         when initializing _M_current.
7057         (move_iterator::base): Split into two overloads differing in
7058         ref-qualifiers as in P1207R4 for C++20.
7059
7060 2020-02-04  Jonathan Wakely  <jwakely@redhat.com>
7061
7062         * include/std/functional (_GLIBCXX_NOT_FN_CALL_OP): Un-define after
7063         use.
7064
7065         PR libstdc++/93562
7066         * include/bits/unique_ptr.h (__uniq_ptr_impl::swap): Define.
7067         (unique_ptr::swap, unique_ptr<T[], D>::swap): Call it.
7068         * testsuite/20_util/unique_ptr/modifiers/93562.cc: New test.
7069
7070 2020-02-01  Andrew Burgess  <andrew.burgess@embecosm.com>
7071
7072         * configure: Regenerate.
7073
7074 2020-01-31  Patrick Palka  <ppalka@redhat.com>
7075
7076         * testsuite/24_iterators/range_operations/distance.cc: Do not assume
7077         test_range::end() returns the same type as test_range::begin().
7078         * testsuite/24_iterators/range_operations/next.cc: Likewise.
7079         * testsuite/24_iterators/range_operations/prev.cc: Likewise.
7080         * testsuite/util/testsuite_iterators.h (__gnu_test::test_range::end):
7081         Always return a sentinel<I>.
7082
7083 2020-01-29  Jonathan Wakely  <jwakely@redhat.com>
7084
7085         PR libstdc++/92895
7086         * include/std/stop_token (stop_token::stop_possible()): Call new
7087         _M_stop_possible() function.
7088         (stop_token::stop_requested()): Do not use stop_possible().
7089         (stop_token::binary_semaphore): New class, as temporary stand-in for
7090         std::binary_semaphore.
7091         (stop_token::_Stop_cb::_M_callback): Add noexcept to type.
7092         (stop_token::_Stop_cb::_M_destroyed, stop_token::_Stop_cb::_M_done):
7093         New data members for symchronization with stop_callback destruction.
7094         (stop_token::_Stop_cb::_Stop_cb): Make non-template.
7095         (stop_token::_Stop_cb::_M_linked, stop_token::_Stop_cb::_S_execute):
7096         Remove.
7097         (stop_token::_Stop_cb::_M_run): New member function.
7098         (stop_token::_Stop_state::_M_stopped, stop_token::_Stop_state::_M_mtx):
7099         Remove.
7100         (stop_token::_Stop_state::_M_owners): New data member to track
7101         reference count for ownership.
7102         (stop_token::_Stop_state::_M_value): New data member combining a
7103         spinlock, the stop requested flag, and the reference count for
7104         associated stop_source objects.
7105         (stop_token::_Stop_state::_M_requester): New data member for
7106         synchronization with stop_callback destruction.
7107         (stop_token::_Stop_state::_M_stop_possible()): New member function.
7108         (stop_token::_Stop_state::_M_stop_requested()): Inspect relevant bit
7109         of _M_value.
7110         (stop_token::_Stop_state::_M_add_owner)
7111         (stop_token::_Stop_state::_M_release_ownership)
7112         (stop_token::_Stop_state::_M_add_ssrc)
7113         (stop_token::_Stop_state::_M_sub_ssrc): New member functions for
7114         updating reference counts.
7115         (stop_token::_Stop_state::_M_lock, stop_token::_Stop_state::_M_unlock)
7116         (stop_token::_Stop_state::_M_lock, stop_token::_Stop_state::_M_unlock)
7117         (stop_token::_Stop_state::_M_try_lock)
7118         (stop_token::_Stop_state::_M_try_lock_and_stop)
7119         (stop_token::_Stop_state::_M_do_try_lock): New member functions for
7120         managing spinlock.
7121         (stop_token::_Stop_state::_M_request_stop): Use atomic operations to
7122         read and update state. Release lock while running callbacks. Use new
7123         data members to synchronize with callback destruction.
7124         (stop_token::_Stop_state::_M_remove_callback): Likewise.
7125         (stop_token::_Stop_state::_M_register_callback): Use atomic operations
7126         to read and update state.
7127         (stop_token::_Stop_state_ref): Handle type to manage _Stop_state,
7128         replacing shared_ptr.
7129         (stop_source::stop_source(const stop_source&)): Update reference count.
7130         (stop_source::operator=(const stop_source&)): Likewise.
7131         (stop_source::~stop_source()): Likewise.
7132         (stop_source::stop_source(stop_source&&)): Define as defaulted.
7133         (stop_source::operator=(stop_source&&)): Establish postcondition on
7134         parameter.
7135         (stop_callback): Enforce preconditions on template parameter. Replace
7136         base class with data member of new _Cb_impl type.
7137         (stop_callback::stop_callback(const stop_token&, Cb&&))
7138         (stop_callback::stop_callback(stop_token&&, Cb&&)): Fix TOCTTOU race.
7139         (stop_callback::_Cb_impl): New type wrapping _Callback member and
7140         defining the _S_execute member function.
7141         * testsuite/30_threads/stop_token/stop_callback/deadlock-mt.cc: New
7142         test.
7143         * testsuite/30_threads/stop_token/stop_callback/deadlock.cc: New test.
7144         * testsuite/30_threads/stop_token/stop_callback/destroy.cc: New test.
7145         * testsuite/30_threads/stop_token/stop_callback/destructible_neg.cc:
7146         New test.
7147         * testsuite/30_threads/stop_token/stop_callback/invocable_neg.cc: New
7148         test.
7149         * testsuite/30_threads/stop_token/stop_callback/invoke.cc: New test.
7150         * testsuite/30_threads/stop_token/stop_source/assign.cc: New test.
7151         * testsuite/30_threads/stop_token/stop_token/stop_possible.cc: New
7152         test.
7153
7154         * libsupc++/compare (__detail::__3way_builtin_ptr_cmp): Use
7155         three_way_comparable_with.
7156         (__detail::__3way_cmp_with): Remove workaround for fixed bug.
7157         (compare_three_way::operator()): Remove redundant constraint from
7158         requires-clause.
7159         (__detail::_Synth3way::operator()): Use three_way_comparable_with
7160         instead of workaround.
7161         * testsuite/18_support/comparisons/object/93479.cc: Prune extra
7162         output due to simplified constraints on compare_three_way::operator().
7163
7164         PR libstdc++/93479
7165         * libsupc++/compare (__3way_builtin_ptr_cmp): Require <=> to be valid.
7166         * testsuite/18_support/comparisons/object/93479.cc: New test.
7167
7168         * testsuite/std/ranges/access/end.cc: Do not assume test_range::end()
7169         returns the same type as test_range::begin(). Add comments.
7170         * testsuite/std/ranges/access/rbegin.cc: Likewise.
7171         * testsuite/std/ranges/access/rend.cc: Likewise.
7172         * testsuite/std/ranges/range.cc: Do not assume the sentinel for
7173         test_range is the same as its iterator type.
7174         * testsuite/util/testsuite_iterators.h (test_range::sentinel): Add
7175         operator- overloads to satisfy sized_sentinel_for when the iterator
7176         satisfies random_access_iterator.
7177
7178 2020-01-28  Jonathan Wakely  <jwakely@redhat.com>
7179
7180         PR libstdc++/93470
7181         * include/bits/refwrap.h (reference_wrapper::operator()): Restrict
7182         static assertion to object types.
7183
7184         PR libstdc++/93325
7185         * acinclude.m4 (GLIBCXX_ENABLE_LIBSTDCXX_TIME): Use AC_SEARCH_LIBS for
7186         clock_gettime instead of explicit glibc version check.
7187         * configure: Regenerate.
7188
7189 2020-01-28  Martin Liska  <mliska@suse.cz>
7190
7191         PR libstdc++/93478
7192         * include/std/atomic: Fix typo.
7193         * include/std/optional: Likewise.
7194
7195 2020-01-27  Andrew Burgess  <andrew.burgess@embecosm.com>
7196
7197         * configure: Regenerate.
7198
7199 2020-01-27  Jonathan Wakely  <jwakely@redhat.com>
7200
7201         PR libstdc++/93426
7202         * include/std/span (span): Fix deduction guide.
7203         * testsuite/23_containers/span/deduction.cc: New test.
7204
7205 2020-01-24  Jonathan Wakely  <jwakely@redhat.com>
7206
7207         * libsupc++/compare (__cmp_cat::_Eq): Remove enumeration type.
7208         (__cmp_cat::_Ord::equivalent): Add enumerator.
7209         (__cmp_cat::_Ord::_Less, __cmp_cat::_Ord::_Greater): Rename to less
7210         and greater.
7211         (partial_ordering, weak_ordering, strong_ordering): Remove
7212         constructors taking __cmp_cat::_Eq parameters. Use renamed
7213         enumerators.
7214
7215 2020-01-24  Maciej W. Rozycki  <macro@wdc.com>
7216
7217         * acinclude.m4: Handle `--with-toolexeclibdir='.
7218         * Makefile.in: Regenerate.
7219         * aclocal.m4: Regenerate.
7220         * configure: Regenerate.
7221         * doc/Makefile.in: Regenerate.
7222         * include/Makefile.in: Regenerate.
7223         * libsupc++/Makefile.in: Regenerate.
7224         * po/Makefile.in: Regenerate.
7225         * python/Makefile.in: Regenerate.
7226         * src/Makefile.in: Regenerate.
7227         * src/c++11/Makefile.in: Regenerate.
7228         * src/c++17/Makefile.in: Regenerate.
7229         * src/c++98/Makefile.in: Regenerate.
7230         * src/filesystem/Makefile.in: Regenerate.
7231         * testsuite/Makefile.in: Regenerate.
7232
7233 2020-01-23  Alexandre Oliva <oliva@adacore.com>
7234
7235         * crossconfig.m4 (GLIBCXX_CHECK_MATH_DECL): Reject macros.
7236         * configure: Rebuild.
7237
7238         * testsuite/27_io/fpos/mbstate_t/1.cc: Zero-init mbstate_t.
7239
7240 2020-01-23  Jonathan Wakely  <jwakely@redhat.com>
7241
7242         PR libstdc++/91947
7243         * include/Makefile.am (${host_builddir}/largefile-config.h): Simplify
7244         rule.
7245         * include/Makefile.in: Regenerate.
7246
7247 2020-01-20  Jonathan Wakely  <jwakely@redhat.com>
7248
7249         * doc/xml/faq.xml: Fix grammar.
7250         * doc/xml/manual/appendix_contributing.xml: Improve instructions.
7251         * doc/xml/manual/spine.xml: Update copyright years.
7252         * doc/html/*: Regenerate.
7253
7254 2020-01-19  Eric S. Raymond <esr@thyrsus.com>
7255
7256         * doc/xml/faq.xml: Update for SVN -> Git transition.
7257         * doc/xml/manual/appendix_contributing.xml: Likewise.
7258         * doc/xml/manual/status_cxx1998.xml: Likewise.
7259         * doc/xml/manual/status_cxx2011.xml: Likewise.
7260         * doc/xml/manual/status_cxx2014.xml: Likewise.
7261         * doc/xml/manual/status_cxx2017.xml: Likewise.
7262         * doc/xml/manual/status_cxx2020.xml: Likewise.
7263         * doc/xml/manual/status_cxxtr1.xml: Likewise.
7264         * doc/xml/manual/status_cxxtr24733.xml: Likewise.
7265
7266 2020-01-18  Iain Sandoe  <iain@sandoe.co.uk>
7267
7268         * include/Makefile.am: Add coroutine to the std set.
7269         * include/Makefile.in: Regenerated.
7270         * include/std/coroutine: New file.
7271
7272 2020-01-17  Jonathan Wakely  <jwakely@redhat.com>
7273
7274         PR libstdc++/92376
7275         * include/bits/c++config: Only do PSTL config when the header is
7276         present, to fix freestanding.
7277         * libsupc++/new_opa.cc [!_GLIBCXX_HOSTED]: Declare allocation
7278         functions if they were detected by configure.
7279
7280 2020-01-16  Kai-Uwe Eckhardt  <kuehro@gmx.de>
7281             Matthew Bauer  <mjbauer95@gmail.com>
7282             Jonathan Wakely  <jwakely@redhat.com>
7283
7284         PR bootstrap/64271 (partial)
7285         * config/os/bsd/netbsd/ctype_base.h (ctype_base::mask): Change type
7286         to unsigned short.
7287         (ctype_base::alpha, ctype_base::digit, ctype_base::xdigit)
7288         (ctype_base::print, ctype_base::graph, ctype_base::alnum): Sync
7289         definitions with NetBSD upstream.
7290         (ctype_base::blank): Use _CTYPE_BL.
7291         * config/os/bsd/netbsd/ctype_configure_char.cc (_C_ctype_): Remove
7292         Declaration.
7293         (ctype<char>::classic_table): Use _C_ctype_tab_ instead of _C_ctype_.
7294         (ctype<char>::do_toupper, ctype<char>::do_tolower): Cast char
7295         parameters to unsigned char.
7296         * config/os/bsd/netbsd/ctype_inline.h (ctype<char>::is): Likewise.
7297
7298 2020-01-16  François Dumont  <fdumont@gcc.gnu.org>
7299
7300         PR libstdc++/91263
7301         * include/bits/hashtable.h (_Hashtable<>): Make _Equality<> friend.
7302         * include/bits/hashtable_policy.h: Include <bits/stl_algo.h>.
7303         (_Equality_base): Remove.
7304         (_Equality<>::_M_equal): Review implementation. Use
7305         std::is_permutation.
7306         * testsuite/23_containers/unordered_multiset/operators/1.cc
7307         (Hash, Equal, test02, test03): New.
7308         * testsuite/23_containers/unordered_set/operators/1.cc
7309         (Hash, Equal, test02, test03): New.
7310
7311 2020-01-15  Jonathan Wakely  <jwakely@redhat.com>
7312
7313         PR libstdc++/93267
7314         * include/bits/iterator_concepts.h (__max_diff_type, __max_size_type):
7315         Move here from <bits/range_access.h> and define using __int128 when
7316         available.
7317         (__is_integer_like, __is_signed_integer_like): Move here from
7318         <bits/range_access.h>.
7319         (weakly_incrementable): Use __is_signed_integer_like.
7320         * include/bits/range_access.h (__max_diff_type, __max_size_type)
7321         (__is_integer_like, __is_signed_integer_like): Move to
7322         <bits/iterator_concepts.h>.
7323         (__make_unsigned_like_t): Move here from <ranges>.
7324         * include/std/ranges (__make_unsigned_like_t): Move to
7325         <bits/range_access.h>.
7326         (iota_view): Replace using-directive with using-declarations.
7327         * testsuite/std/ranges/iota/93267.cc: New test.
7328         * testsuite/std/ranges/iota_view.cc: Move to new 'iota' sub-directory.
7329
7330 2020-01-13  Jonathan Wakely  <jwakely@redhat.com>
7331
7332         PR libstdc++/93244
7333         * include/bits/fs_path.h (path::generic_string<C,A>)
7334         [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Convert root-dir to forward-slash.
7335         * testsuite/27_io/filesystem/path/generic/generic_string.cc: Check
7336         root-dir is converted to forward slash in generic pathname.
7337         * testsuite/27_io/filesystem/path/generic/utf.cc: New test.
7338         * testsuite/27_io/filesystem/path/generic/wchar_t.cc: New test.
7339
7340         PR libstdc++/58605
7341         * include/bits/atomic_base.h (__cpp_lib_atomic_value_initialization):
7342         Define.
7343         (__atomic_flag_base, __atomic_base, __atomic_base<_PTp*>)
7344         (__atomic_float): Add default member initializer for C++20.
7345         * include/std/atomic (atomic): Likewise.
7346         (atomic::atomic()): Remove noexcept-specifier on default constructor.
7347         * include/std/version (__cpp_lib_atomic_value_initialization): Define.
7348         * testsuite/29_atomics/atomic/cons/assign_neg.cc: Adjust dg-error line
7349         number.
7350         * testsuite/29_atomics/atomic/cons/copy_neg.cc: Likewise.
7351         * testsuite/29_atomics/atomic/cons/value_init.cc: New test.
7352         * testsuite/29_atomics/atomic_flag/cons/value_init.cc: New test.
7353         * testsuite/29_atomics/atomic_flag/requirements/trivial.cc: Adjust
7354         expected result for is_trivially_default_constructible.
7355         * testsuite/29_atomics/atomic_float/requirements.cc: Likewise.
7356         * testsuite/29_atomics/atomic_float/value_init.cc: New test.
7357         * testsuite/29_atomics/atomic_integral/cons/assign_neg.cc: Likewise.
7358         * testsuite/29_atomics/atomic_integral/cons/copy_neg.cc: Likewise.
7359         * testsuite/29_atomics/atomic_integral/cons/value_init.cc
7360         * testsuite/29_atomics/atomic_integral/requirements/trivial.cc: Adjust
7361         expected results for is_trivially_default_constructible.
7362         * testsuite/util/testsuite_common_types.h (has_trivial_dtor): Add
7363         new test generator.
7364
7365 2020-01-10  Jonathan Wakely  <jwakely@redhat.com>
7366
7367         * testsuite/util/testsuite_iterators.h: Improve comment.
7368
7369         * testsuite/25_algorithms/equal/deque_iterators/1.cc: Don't use C++11
7370         initialization syntax.
7371
7372         PR libstdc++/92285
7373         * include/bits/streambuf_iterator.h (istreambuf_iterator): Make type
7374         of base class independent of __cplusplus value.
7375         [__cplusplus < 201103L] (istreambuf_iterator::reference): Override the
7376         type defined in the base class
7377         * testsuite/24_iterators/istreambuf_iterator/92285.cc: New test.
7378         * testsuite/24_iterators/istreambuf_iterator/requirements/
7379         base_classes.cc: Adjust expected base class for C++98.
7380
7381 2020-01-09  Olivier Hainque  <hainque@adacore.com>
7382
7383         * doc/xml/manual/appendix_contributing.xml: Document _C2
7384         as a reserved identifier, by VxWorks.
7385         * include/bits/stl_map.h: Rename _C2 template typenames as _Cmp2.
7386         * include/bits/stl_multimap.h: Likewise.
7387
7388 2020-01-09  Jonathan Wakely  <jwakely@redhat.com>
7389
7390         * include/ext/extptr_allocator.h (_ExtPtr_allocator::operator==)
7391         (_ExtPtr_allocator::operator!=): Add missing const qualifiers.
7392         * include/ext/pointer.h (readable_traits<_Pointer_adapter<S>>): Add
7393         partial specialization to disambiguate the two constrained
7394         specializations.
7395
7396         * include/experimental/type_traits (experimental::is_pod_v): Disable
7397         -Wdeprecated-declarations warnings around reference to std::is_pod.
7398         * include/std/type_traits (is_pod_v): Likewise.
7399         * testsuite/18_support/max_align_t/requirements/2.cc: Also check
7400         is_standard_layout and is_trivial. Do not check is_pod for C++20.
7401         * testsuite/20_util/is_pod/requirements/explicit_instantiation.cc:
7402         Add -Wno-deprecated for C++20.
7403         * testsuite/20_util/is_pod/requirements/typedefs.cc: Likewise.
7404         * testsuite/20_util/is_pod/value.cc: Likewise.
7405         * testsuite/experimental/type_traits/value.cc: Likewise.
7406
7407 2020-01-09  JeanHeyd "ThePhD" Meneide  <phdofthehouse@gmail.com>
7408
7409         * include/bits/c++config (_GLIBCXX20_DEPRECATED): Add new macro.
7410         * include/std/type_traits (is_pod, is_pod_v): Deprecate for C++20.
7411         * testuite/20_util/is_pod/deprecated-2a.cc: New test.
7412
7413 2020-01-09  Jonathan Wakely  <jwakely@redhat.com>
7414
7415         PR libstdc++/93205
7416         * include/bits/random.h (operator>>): Check stream operation succeeds.
7417         * include/bits/random.tcc (operator<<): Remove redundant __ostream_type
7418         typedefs.
7419         (operator>>): Remove redundant __istream_type typedefs. Check stream
7420         operations succeed.
7421         (__extract_params): New function to fill a vector from a stream.
7422         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error line.
7423
7424         PR libstdc++/93208
7425         * config/abi/pre/gnu.ver: Add new exports.
7426         * include/std/memory_resource (memory_resource::~memory_resource()):
7427         Do not define inline.
7428         (monotonic_buffer_resource::~monotonic_buffer_resource()): Likewise.
7429         * src/c++17/memory_resource.cc (memory_resource::~memory_resource()):
7430         Define.
7431         (monotonic_buffer_resource::~monotonic_buffer_resource()): Define.
7432         * testsuite/20_util/monotonic_buffer_resource/93208.cc: New test.
7433
7434 2020-01-09  François Dumont  <fdumont@gcc.gnu.org>
7435
7436         PR libstdc++/92124
7437         * include/bits/hashtable.h (_Hashtable<>::__alloc_node_gen_t): New
7438         template alias.
7439         (_Hashtable<>::__fwd_value_for): New.
7440         (_Hashtable<>::_M_assign_elements<>): Remove _NodeGenerator template
7441         parameter.
7442         (_Hashtable<>::_M_assign<>): Add _Ht template parameter.
7443         (_Hashtable<>::operator=(const _Hashtable<>&)): Adapt.
7444         (_Hashtable<>::_M_move_assign): Adapt. Replace std::move_if_noexcept
7445         with std::move.
7446         (_Hashtable<>::_Hashtable(const _Hashtable&)): Adapt.
7447         (_Hashtable<>::_Hashtable(const _Hashtable&, const allocator_type&)):
7448         Adapt.
7449         (_Hashtable<>::_Hashtable(_Hashtable&&, const allocator_type&)):
7450         Adapt.
7451         * testsuite/23_containers/unordered_set/92124.cc: New.
7452
7453 2020-01-08  Jonathan Wakely  <jwakely@redhat.com>
7454
7455         PR libstdc++/93201
7456         * src/c++17/fs_ops.cc (do_remove_all): New function implementing more
7457         detailed error reporting for remove_all. Check result of recursive
7458         call before incrementing iterator.
7459         (remove_all(const path&), remove_all(const path&, error_code&)): Use
7460         do_remove_all.
7461         * src/filesystem/ops.cc (remove_all(const path&, error_code&)): Check
7462         result of recursive call before incrementing iterator.
7463         * testsuite/27_io/filesystem/operations/remove_all.cc: Check errors
7464         are reported correctly.
7465         * testsuite/experimental/filesystem/operations/remove_all.cc: Likewise.
7466
7467 2020-01-07  Thomas Rodgers  <trodgers@redhat.com>
7468
7469         * include/std/condition_variable
7470         (condition_variable_any::wait_on): Rename to match current draft
7471         standard.
7472         (condition_variable_any::wait_on_until): Likewise.
7473         (condition_variable_any::wait_on_for): Likewise.
7474         * testsuite/30_threads/condition_variable_any/stop_token/wait_on.cc:
7475         Adjust tests to account for renamed methods.
7476
7477 2020-01-07  François Dumont  <fdumont@gcc.gnu.org>
7478
7479         PR libstdc++/92124
7480         * include/bits/stl_tree.h
7481         (_Rb_tree<>::_M_move_assign(_Rb_tree&, false_type)): Replace
7482         std::move_if_noexcept by std::move.
7483         * testsuite/23_containers/map/92124.cc: New.
7484         * testsuite/23_containers/set/92124.cc: New.
7485
7486 2020-01-06  Jonathan Wakely  <jwakely@redhat.com>
7487
7488         * include/std/stop_token (stop_token): Remove operator!= (LWG 3254).
7489         (stop_source): Likewise (LWG 3362).
7490         * testsuite/30_threads/stop_token/stop_source.cc: Test equality
7491         comparisons.
7492
7493         * include/bits/stl_algobase.h (__is_byte_iter, __min_cmp)
7494         (lexicographical_compare_three_way): Do not depend on
7495         __cpp_lib_concepts.
7496         * include/std/version (__cpp_lib_three_way_comparison): Only define
7497         when __cpp_lib_concepts is defined.
7498         * libsupc++/compare (__cpp_lib_three_way_comparison): Likewise.
7499
7500 2020-01-03  Jonathan Wakely  <jwakely@redhat.com>
7501
7502         * include/bits/stl_algobase.h (lexicographical_compare_three_way):
7503         Only define four-argument overload when __cpp_lib_concepts is defined.
7504
7505 2020-01-01  John David Anglin  <danglin@gcc.gnu.org>
7506
7507         * config/abi/post/hppa-linux-gnu/baseline_symbols.txt: Update.
7508
7509 2020-01-01  Jakub Jelinek  <jakub@redhat.com>
7510
7511         Update copyright years.
7512 \f
7513 Copyright (C) 2020 Free Software Foundation, Inc.
7514
7515 Copying and distribution of this file, with or without modification,
7516 are permitted in any medium without royalty provided the copyright
7517 notice and this notice are preserved.