libstdc++-v3/ChangeLog

   1 2020-11-23  Jonathan Wakely  <jwakely@redhat.com>
   2
   3         * include/bits/semaphore_base.h
   4         (__platform_semaphore::_M_try_acquire_until): Fix type of
   5         variable.
   6
   7 2020-11-23  Stephan Bergmann  <sbergman@redhat.com>
   8
   9         * include/bits/atomic_wait.h (__thread_relax, __thread_yield):
  10         Add 'inline'.
  11
  12 2020-11-23  Jonathan Wakely  <jwakely@redhat.com>
  13
  14         * acinclude.m4 (GLIBCXX_CHECK_GTHREADS): Check for
  15         * config.h.in: Regenerate.
  16         * configure: Regenerate.
  17         * include/bits/semaphore_base.h (_GLIBCXX_HAVE_POSIX_SEMAPHORE):
  18         Check autoconf macro instead of defining it here.
  19
  20 2020-11-23  Jonathan Wakely  <jwakely@redhat.com>
  21
  22         * include/bits/atomic_wait.h: Do not define anything unless
  23         gthreads or futexes are available.
  24         * include/bits/atomic_timed_wait.h: Likewise.
  25         * include/bits/semaphore_base.h: Likewise.
  26         * include/std/semaphore: Likewise.
  27         * include/bits/atomic_base.h (atomic_flag::wait)
  28         (atomic_flag::notify_one, atomic_flag::notify_all)
  29         (__atomic_base<I>::wait, __atomic_base<I>::notify_one)
  30         (__atomic_base<I>::notify_all, __atomic_base<P*>::wait)
  31         (__atomic_base<P*>::notify_one, __atomic_base<P*>::notify_all)
  32         (__atomic_impl::wait, __atomic_impl::notify_one)
  33         (__atomic_impl::notify_all, __atomic_float::wait)
  34         (__atomic_float::notify_one, __atomic_float::notify_all)
  35         (__atomic_ref::wait, __atomic_ref::notify_one)
  36         (__atomic_ref::notify_all): Only define if gthreads or futexes
  37         are available.
  38         * include/std/atomic (atomic::wait, atomic::notify_one)
  39         (atomic::notify_all): Likewise.
  40         * include/std/version (__cpp_lib_semaphore): Define
  41         conditionally.
  42
  43 2020-11-23  Jonathan Wakely  <jwakely@redhat.com>
  44
  45         PR libstdc++/97948
  46         * testsuite/29_atomics/atomic_float/wait_notify.cc: Add options
  47         for libatomic.
  48         * testsuite/29_atomics/atomic_integral/wait_notify.cc: Likewise.
  49         * testsuite/29_atomics/atomic_ref/wait_notify.cc: Likewise.
  50
  51 2020-11-21  Jonathan Wakely  <jwakely@redhat.com>
  52
  53         * include/bits/atomic_base.h (atomic_flag::wait): Use correct
  54         type for __atomic_wait call.
  55         * include/bits/atomic_timed_wait.h (__atomic_wait_until): Check
  56         _GLIBCXX_HAVE_LINUX_FUTEX.
  57         * include/bits/atomic_wait.h (__atomic_notify): Likewise.
  58         * include/bits/semaphore_base.h (_GLIBCXX_HAVE_POSIX_SEMAPHORE):
  59         Only define if SEM_VALUE_MAX or _POSIX_SEM_VALUE_MAX is defined.
  60         * testsuite/29_atomics/atomic/wait_notify/bool.cc: Disable on
  61         non-linux targes.
  62         * testsuite/29_atomics/atomic/wait_notify/generic.cc: Likewise.
  63         * testsuite/29_atomics/atomic/wait_notify/pointers.cc: Likewise.
  64         * testsuite/29_atomics/atomic_flag/wait_notify/1.cc: Likewise.
  65         * testsuite/29_atomics/atomic_float/wait_notify.cc: Likewise.
  66
  67 2020-11-20  Thomas Rodgers  <trodgers@redhat.com>
  68
  69         * include/Makefile.am (bits_headers): Add new header.
  70         * include/Makefile.in: Regenerate.
  71         * include/bits/atomic_base.h (__atomic_flag::wait): Define.
  72         (__atomic_flag::notify_one): Likewise.
  73         (__atomic_flag::notify_all): Likewise.
  74         (__atomic_base<_Itp>::wait): Likewise.
  75         (__atomic_base<_Itp>::notify_one): Likewise.
  76         (__atomic_base<_Itp>::notify_all): Likewise.
  77         (__atomic_base<_Ptp*>::wait): Likewise.
  78         (__atomic_base<_Ptp*>::notify_one): Likewise.
  79         (__atomic_base<_Ptp*>::notify_all): Likewise.
  80         (__atomic_impl::wait): Likewise.
  81         (__atomic_impl::notify_one): Likewise.
  82         (__atomic_impl::notify_all): Likewise.
  83         (__atomic_float<_Fp>::wait): Likewise.
  84         (__atomic_float<_Fp>::notify_one): Likewise.
  85         (__atomic_float<_Fp>::notify_all): Likewise.
  86         (__atomic_ref<_Tp>::wait): Likewise.
  87         (__atomic_ref<_Tp>::notify_one): Likewise.
  88         (__atomic_ref<_Tp>::notify_all): Likewise.
  89         (atomic_wait<_Tp>): Likewise.
  90         (atomic_wait_explicit<_Tp>): Likewise.
  91         (atomic_notify_one<_Tp>): Likewise.
  92         (atomic_notify_all<_Tp>): Likewise.
  93         * include/bits/atomic_wait.h: New file.
  94         * include/bits/atomic_timed_wait.h: New file.
  95         * include/bits/semaphore_base.h: New file.
  96         * include/std/atomic (atomic<bool>::wait): Define.
  97         (atomic<bool>::wait_one): Likewise.
  98         (atomic<bool>::wait_all): Likewise.
  99         (atomic<_Tp>::wait): Likewise.
 100         (atomic<_Tp>::wait_one): Likewise.
 101         (atomic<_Tp>::wait_all): Likewise.
 102         (atomic<_Tp*>::wait): Likewise.
 103         (atomic<_Tp*>::wait_one): Likewise.
 104         (atomic<_Tp*>::wait_all): Likewise.
 105         * include/std/latch: New file.
 106         * include/std/semaphore: New file.
 107         * include/std/version: Add __cpp_lib_semaphore and
 108         __cpp_lib_latch defines.
 109         * testsuite/29_atomics/atomic/wait_notify/bool.cc: New test.
 110         * testsuite/29_atomics/atomic/wait_notify/pointers.cc: Likewise.
 111         * testsuite/29_atomics/atomic/wait_notify/generic.cc: Liekwise.
 112         * testsuite/29_atomics/atomic_flag/wait_notify/1.cc: Likewise.
 113         * testsuite/29_atomics/atomic_float/wait_notify.cc: Likewise.
 114         * testsuite/29_atomics/atomic_integral/wait_notify.cc: Likewise.
 115         * testsuite/29_atomics/atomic_ref/wait_notify.cc: Likewise.
 116         * testsuite/30_threads/semaphore/1.cc: New test.
 117         * testsuite/30_threads/semaphore/2.cc: Likewise.
 118         * testsuite/30_threads/semaphore/least_max_value_neg.cc: Likewise.
 119         * testsuite/30_threads/semaphore/try_acquire.cc: Likewise.
 120         * testsuite/30_threads/semaphore/try_acquire_for.cc: Likewise.
 121         * testsuite/30_threads/semaphore/try_acquire_posix.cc: Likewise.
 122         * testsuite/30_threads/semaphore/try_acquire_until.cc: Likewise.
 123         * testsuite/30_threads/latch/1.cc: New test.
 124         * testsuite/30_threads/latch/2.cc: New test.
 125         * testsuite/30_threads/latch/3.cc: New test.
 126         * testsuite/util/atomic/wait_notify_util.h: New File.
 127
 128 2020-11-20  François Dumont  <fdumont@gcc.gnu.org>
 129
 130         PR libstdc++/83938
 131         * include/bits/stl_tempbuf.h (get_temporary_buffer): Change __len
 132         computation in the loop to avoid truncation.
 133         * include/bits/stl_algo.h:
 134         (__inplace_merge): Take temporary buffer length from smallest range.
 135         (__stable_sort): Limit temporary buffer length.
 136         * testsuite/25_algorithms/inplace_merge/1.cc (test4): New.
 137         * testsuite/performance/25_algorithms/stable_sort.cc: Test stable_sort
 138         under different heap memory conditions.
 139         * testsuite/performance/25_algorithms/inplace_merge.cc: New test.
 140
 141 2020-11-20  François Dumont  <fdumont@gcc.gnu.org>
 142
 143         * include/bits/move.h (_GLIBCXX_FWDREF): New.
 144         * include/bits/stl_tree.h: Adapt to use latter.
 145         (_Rb_tree<>::_M_clone_node): Add _MoveValue template parameter.
 146         (_Rb_tree<>::_M_mbegin): New.
 147         (_Rb_tree<>::_M_begin): Use latter.
 148         (_Rb_tree<>::_M_copy): Add _MoveValues template parameter.
 149         * testsuite/23_containers/map/allocator/move_cons.cc: New test.
 150         * testsuite/23_containers/multimap/allocator/move_cons.cc: New test.
 151         * testsuite/23_containers/multiset/allocator/move_cons.cc: New test.
 152         * testsuite/23_containers/set/allocator/move_cons.cc: New test.
 153
 154 2020-11-20  Jonathan Wakely  <jwakely@redhat.com>
 155
 156         PR libstdc++/92546
 157         * include/std/regex (pmr::smatch, pmr::wsmatch): Declare using
 158         underlying __normal_iterator type, not nested typedef
 159         basic_string::const_iterator.
 160
 161 2020-11-19  Jonathan Wakely  <jwakely@redhat.com>
 162
 163         PR libstdc++/95989
 164         * config/os/gnu-linux/os_defines.h (_GLIBCXX_NATIVE_THREAD_ID):
 165         Define new macro to get reliable thread ID.
 166         * include/bits/std_thread.h: (this_thread::get_id): Use new
 167         macro if it's defined.
 168         * testsuite/30_threads/jthread/95989.cc: New test.
 169         * testsuite/30_threads/this_thread/95989.cc: New test.
 170
 171 2020-11-19  Jonathan Wakely  <jwakely@redhat.com>
 172
 173         * testsuite/30_threads/async/async.cc: Include <thread>.
 174         * testsuite/30_threads/future/members/93456.cc: Likewise.
 175
 176 2020-11-19  Jonathan Wakely  <jwakely@redhat.com>
 177
 178         PR libstdc++/92546
 179         * include/Makefile.am: Add new <bits/std_thread.h> header.
 180         * include/Makefile.in: Regenerate.
 181         * include/std/future: Include new header instead of <thread>.
 182         * include/std/stop_token: Include new header instead of
 183         <bits/gthr.h>.
 184         (stop_token::_S_yield()): Use this_thread::yield().
 185         (_Stop_state_t::_M_requester): Change type to std::thread::id.
 186         (_Stop_state_t::_M_request_stop()): Use this_thread::get_id().
 187         (_Stop_state_t::_M_remove_callback(_Stop_cb*)): Likewise.
 188         Use __is_single_threaded() to decide whether to synchronize.
 189         * include/std/thread (thread, operator==, this_thread::get_id)
 190         (this_thread::yield): Move to new header.
 191         (operator<=>, operator!=, operator<, operator<=, operator>)
 192         (operator>=, hash<thread::id>, operator<<): Define even when
 193         gthreads not available.
 194         * src/c++11/thread.cc: Include <memory>.
 195         * include/bits/std_thread.h: New file.
 196         (thread, operator==, this_thread::get_id, this_thread::yield):
 197         Define even when gthreads not available.
 198         [!_GLIBCXX_HAS_GTHREADS] (thread::join, thread::detach)
 199         (thread::hardware_concurrency): Define inline.
 200
 201 2020-11-19  Jonathan Wakely  <jwakely@redhat.com>
 202
 203         PR libstdc++/93421
 204         PR libstdc++/93456
 205         * src/c++11/futex.cc (syscall_time_t): New typedef for
 206         the type of the syscall_timespec::tv_sec member.
 207         (relative_timespec, _M_futex_wait_until)
 208         (_M_futex_wait_until_steady): Use syscall_time_t in overflow
 209         checks, not time_t.
 210
 211 2020-11-18  Patrick Palka  <ppalka@redhat.com>
 212
 213         * include/std/ranges (join_view::_Iterator::_M_satisfy): Uglify
 214         local variable inner.
 215         (join_view::_Iterator::operator->): Use _Inner_iter instead of
 216         _Outer_iter in the function signature as per LWG 3500.
 217         * testsuite/std/ranges/adaptors/join.cc (test08): Test it.
 218
 219 2020-11-17  Jonathan Wakely  <jwakely@redhat.com>
 220
 221         PR libstdc++/93421
 222         * acinclude.m4 (GLIBCXX_ENABLE_LIBSTDCXX_TIME): Fail if struct
 223         timespec isn't compatible with SYS_clock_gettime.
 224         * configure: Regenerate.
 225         * src/c++11/chrono.cc: Revert changes for time64 compatibility.
 226         Add static_assert instead.
 227         * src/c++11/futex.cc (_M_futex_wait_until_steady): Assume
 228         SYS_clock_gettime can use struct timespec.
 229
 230 2020-11-17  Jonathan Wakely  <jwakely@redhat.com>
 231
 232         PR libstdc++/97869
 233         * include/precompiled/stdc++.h: Include <coroutine>.
 234         * include/std/version (__cpp_lib_span): Check __cpp_lib_concepts
 235         before defining.
 236
 237 2020-11-17  Patrick Palka  <ppalka@redhat.com>
 238
 239         PR libstdc++/97828
 240         * include/bits/ranges_algo.h (__search_n_fn::operator()): Check
 241         random_access_iterator before using the backtracking
 242         implementation.  When the backwards scan fails prematurely,
 243         reset __remainder appropriately.
 244         * testsuite/25_algorithms/search_n/97828.cc: New test.
 245
 246 2020-11-16  Jonathan Wakely  <jwakely@redhat.com>
 247
 248         * src/Makefile.am (libstdc++-symbols.ver-sun): Remove -lrt from
 249         arguments passed to make_sunver.pl script.
 250         * src/Makefile.in: Regenerate.
 251
 252 2020-11-15  Jason Merrill  <jason@redhat.com>
 253
 254         * testsuite/20_util/result_of/sfinae_friendly_1.cc: Adjust.
 255
 256 2020-11-13  Jonathan Wakely  <jwakely@redhat.com>
 257
 258         PR libstdc++/93421
 259         * src/c++11/chrono.cc [_GLIBCXX_USE_CLOCK_GETTIME_SYSCALL]
 260         (syscall_timespec): Define a type suitable for SYS_clock_gettime
 261         calls.
 262         (system_clock::now(), steady_clock::now()): Use syscall_timespec
 263         instead of timespec.
 264         * src/c++11/futex.cc (syscall_timespec): Define a type suitable
 265         for SYS_futex and SYS_clock_gettime calls.
 266         (relative_timespec): Use syscall_timespec instead of timespec.
 267         (__atomic_futex_unsigned_base::_M_futex_wait_until): Likewise.
 268         (__atomic_futex_unsigned_base::_M_futex_wait_until_steady):
 269         Likewise.
 270
 271 2020-11-13  Jonathan Wakely  <jwakely@redhat.com>
 272
 273         PR libstdc++/93456
 274         * src/c++11/futex.cc (relative_timespec): Remove redundant check
 275         negative values.
 276         * testsuite/30_threads/future/members/wait_until_overflow.cc: Moved to...
 277         * testsuite/30_threads/future/members/93456.cc: ...here.
 278
 279 2020-11-13  Jonathan Wakely  <jwakely@redhat.com>
 280
 281         * src/c++11/futex.cc (relative_timespec): Add [[unlikely]]
 282         attributes.
 283         (__atomic_futex_unsigned_base::_M_futex_wait_until)
 284         (__atomic_futex_unsigned_base::_M_futex_wait_until_steady):
 285         Check for overflow.
 286         * testsuite/30_threads/future/members/wait_until_overflow.cc:
 287         New test.
 288
 289 2020-11-13  Jonathan Wakely  <jwakely@redhat.com>
 290
 291         * src/c++11/futex.cc (relative_timespec): New function to
 292         create relative time from two absolute times.
 293         (__atomic_futex_unsigned_base::_M_futex_wait_until)
 294         (__atomic_futex_unsigned_base::_M_futex_wait_until_steady):
 295         Use relative_timespec.
 296
 297 2020-11-13  Jonathan Wakely  <jwakely@redhat.com>
 298
 299         * testsuite/30_threads/future/members/poll.cc: Require gthreads
 300         and add -pthread for targets that require it. Relax required
 301         ratio of wait_for calls before/after the future is ready.
 302
 303 2020-11-12  Jonathan Wakely  <jwakely@redhat.com>
 304
 305         * include/std/future (future::wait_for): Do not wait for
 306         durations less than or equal to zero.
 307         * src/c++11/futex.cc (_M_futex_wait_until)
 308         (_M_futex_wait_until_steady): Do not wait for timeouts before
 309         the epoch.
 310         * testsuite/30_threads/future/members/poll.cc: New test.
 311
 312 2020-11-12  Jonathan Wakely  <jwakely@redhat.com>
 313
 314         * include/ext/numeric_traits.h (__numeric_traits): Change
 315         primary template to always derive from __numeric_traits_integer.
 316         (__numeric_traits<float>, __numeric_traits<double>)
 317         (__numeric_traits<long double>): Add explicit specializations.
 318
 319 2020-11-12  Jonathan Wakely  <jwakely@redhat.com>
 320
 321         PR libstdc++/97798
 322         * include/ext/numeric_traits.h (__glibcxx_signed)
 323         (__glibcxx_digits, __glibcxx_min, __glibcxx_max): Remove
 324         macros.
 325         (__is_integer_nonstrict::__width): Define new constant.
 326         (__numeric_traits_integer): Define constants in terms of each
 327         other and __is_integer_nonstrict::__width, rather than the
 328         removed macros.
 329         (_GLIBCXX_INT_N_TRAITS): Macro to define explicit
 330         specializations for non-standard integer types.
 331
 332 2020-11-11  Jonathan Yong  <10walls@gmail.com>
 333
 334         * acinclude.m4 (GLIBCXX_CHECK_LINKER_FEATURES): Exclude
 335         cygwin and mingw from relro linker test.
 336         * configure: Regenerate.
 337
 338 2020-11-11  Paul Scharnofske  <asynts@gmail.com>
 339
 340         * include/std/thread (jthread::operator=(jthread&&)): Transfer
 341         any existing state to a temporary that will request a stop and
 342         then join.
 343         * testsuite/30_threads/jthread/jthread.cc: Test move assignment.
 344
 345 2020-11-11  Jonathan Wakely  <jwakely@redhat.com>
 346
 347         * include/std/stop_token (_Stop_state_t::_M_requester): Define
 348         new struct with members to store and check the thread ID.
 349         (_Stop_state_t::_M_request_stop()): Use _M_requester._M_set().
 350         (_Stop_state_t::_M_remove_callback(_Stop_cb*)): Use
 351         _M_requester._M_is_current_thread().
 352
 353 2020-11-11  Jonathan Wakely  <jwakely@redhat.com>
 354
 355         * include/std/ostream (__syncbuf_base): New class template.
 356         (emit_on_flush, noemit_on_flush, flush_emit): New manipulators.
 357         * include/std/syncstream (basic_syncbuf): Derive from
 358         __syncbuf_base instead of basic_streambuf.
 359         (basic_syncbuf::operator=): Remove self-assignment check.
 360         (basic_syncbuf::swap): Remove self-swap check.
 361         (basic_syncbuf::emit): Do not skip pubsync() call if sequence
 362         is empty.
 363         (basic_syncbuf::sync): Remove no-op pubsync on stringbuf.
 364         (basic_syncbuf::overflow): Define override.
 365         * testsuite/27_io/basic_syncstream/basic_ops/1.cc: Test
 366         basic_osyncstream::put(char_type).
 367         * testsuite/27_io/basic_ostream/emit/1.cc: New test.
 368
 369 2020-11-10  Jonathan Wakely  <jwakely@redhat.com>
 370
 371         * config/locale/generic/c_locale.cc (__set_C_locale()): New function
 372         to set the "C" locale and return the name of the previous locale.
 373         (__convert_to_v<float>, __convert_to_v<double>)
 374         (__convert_to_v<long double>): Use __set_C_locale and set failbit on
 375         error.
 376
 377 2020-11-10  Jonathan Wakely  <jwakely@redhat.com>
 378
 379         * include/std/sstream (basic_stringbug, basic_istringstream)
 380         (basic_ostringstream, basic_stringstream): Reorder C++20
 381         constructors to be declared next to other constructors.
 382
 383 2020-11-10  Jonathan Wakely  <jwakely@redhat.com>
 384
 385         * config/abi/pre/gnu.ver (GLIBCXX_3.4.21): Tighten patterns.
 386         (GLIBCXX_3.4.29): Export new symbols.
 387         * include/bits/alloc_traits.h (__allocator_like): New concept.
 388         * include/std/sstream (basic_stringbuf::swap): Add exception
 389         specification.
 390         (basic_stringbuf::str() const): Add ref-qualifier. Use new
 391         _M_high_mark function.
 392         (basic_stringbuf::str(const SAlloc&) const): Define new function.
 393         (basic_stringbuf::str() &&): Likewise.
 394         (basic_stringbuf::str(const basic_string<C,T,SAlloc>&)):
 395         Likewise.
 396         (basic_stringbuf::str(basic_string<C,T,Alloc>&&)): Likewise.
 397         (basic_stringbuf::view() const): Use _M_high_mark.
 398         (basic_istringstream::str, basic_ostringstream::str)
 399         (basic_stringstream::str): Define new overloads.
 400         * src/c++20/sstream-inst.cc (basic_stringbuf::str)
 401         (basic_istringstream::str, basic_ostringstream::str)
 402         (basic_stringstream::str): Explicit instantiation definitions
 403         for new overloads.
 404         * testsuite/27_io/basic_istringstream/view/char/1.cc: Add more
 405         checks.
 406         * testsuite/27_io/basic_istringstream/view/wchar_t/1.cc:
 407         Likewise.
 408         * testsuite/27_io/basic_ostringstream/view/char/1.cc:
 409         Likewise.
 410         * testsuite/27_io/basic_ostringstream/view/wchar_t/1.cc:
 411         Likewise.
 412         * testsuite/27_io/basic_stringstream/view/char/1.cc:
 413         Likewise.
 414         * testsuite/27_io/basic_stringstream/view/wchar_t/1.cc:
 415         Likewise.
 416         * testsuite/27_io/basic_istringstream/str/char/2.cc: New test.
 417         * testsuite/27_io/basic_istringstream/str/wchar_t/2.cc: New test.
 418         * testsuite/27_io/basic_ostringstream/str/char/3.cc: New test.
 419         * testsuite/27_io/basic_ostringstream/str/wchar_t/3.cc: New test.
 420         * testsuite/27_io/basic_stringbuf/str/char/4.cc: New test.
 421         * testsuite/27_io/basic_stringbuf/str/wchar_t/4.cc: New test.
 422         * testsuite/27_io/basic_stringstream/str/char/5.cc: New test.
 423         * testsuite/27_io/basic_stringstream/str/wchar_t/5.cc.cc: New test.
 424
 425 2020-11-10  Jonathan Wakely  <jwakely@redhat.com>
 426
 427         PR libstdc++/97415
 428         * include/std/sstream (basic_stringbuf::_M_update_egptr)
 429         (basic_stringbuf::__xfer_bufptrs::__xfer_bufptrs): Check for
 430         null before comparing pointers.
 431
 432 2020-11-09  François Dumont  <fdumont@gcc.gnu.org>
 433
 434         * include/debug/array: Remove.
 435         * include/Makefile.am: Remove <debug/array>.
 436         * include/Makefile.in: Regenerate.
 437         * include/experimental/functional: Adapt.
 438         * include/std/array: Move to _GLIBCXX_INLINE_VERSION namespace.
 439         * include/std/functional: Adapt.
 440         * include/std/span: Adapt.
 441         * testsuite/23_containers/array/debug/back1_neg.cc:
 442         Remove dg-require-debug-mode. Add -D_GLIBCXX_ASSERTIONS option.
 443         * testsuite/23_containers/array/debug/back2_neg.cc: Likewise.
 444         * testsuite/23_containers/array/debug/front1_neg.cc: Likewise.
 445         * testsuite/23_containers/array/debug/front2_neg.cc: Likewise.
 446         * testsuite/23_containers/array/debug/square_brackets_operator1_neg.cc:
 447         Likewise.
 448         * testsuite/23_containers/array/debug/square_brackets_operator2_neg.cc:
 449         Likewise.
 450         * testsuite/23_containers/array/element_access/60497.cc
 451         * testsuite/23_containers/array/tuple_interface/get_debug_neg.cc:
 452         Remove.
 453         * testsuite/23_containers/array/tuple_interface/get_neg.cc
 454         * testsuite/23_containers/array/tuple_interface/tuple_element_debug_neg.cc
 455         * testsuite/23_containers/array/tuple_interface/tuple_element_neg.cc
 456
 457 2020-11-09  François Dumont  <fdumont@gcc.gnu.org>
 458
 459         * include/debug/assertions.h (__glibcxx_requires_non_empty_range):
 460         Remove __builtin_expect.
 461         (__glibcxx_requires_subscript): Likewise.
 462         (__glibcxx_requires_nonempty): Likewise.
 463         * include/debug/formatter.h (__check_singular): Add C++11 constexpr
 464         qualification.
 465         * include/debug/helper_functions.h (__check_singular): Likewise. Skip
 466         check if constant evaluated.
 467         (__valid_range): Do not skip check if constant evaluated.
 468         * include/debug/macros.h (_GLIBCXX_DEBUG_VERIFY_COND_AT): Add
 469         __builtin_expect.
 470         (_GLIBCXX_DEBUG_VERIFY_AT_F): Use __glibcxx_assert_1.
 471         * testsuite/21_strings/basic_string_view/element_access/char/back_constexpr_neg.cc:
 472         New test.
 473         * testsuite/21_strings/basic_string_view/element_access/char/constexpr.cc: New test.
 474         * testsuite/21_strings/basic_string_view/element_access/char/constexpr_neg.cc: New test.
 475         * testsuite/21_strings/basic_string_view/element_access/char/front_back_constexpr.cc:
 476         New test.
 477         * testsuite/21_strings/basic_string_view/element_access/char/front_constexpr_neg.cc:
 478         New test.
 479         * testsuite/21_strings/basic_string_view/element_access/wchar_t/back_constexpr_neg.cc:
 480         New test.
 481         * testsuite/21_strings/basic_string_view/element_access/wchar_t/constexpr.cc: New test.
 482         * testsuite/21_strings/basic_string_view/element_access/wchar_t/constexpr_neg.cc: New test.
 483         * testsuite/21_strings/basic_string_view/element_access/wchar_t/front_constexpr_neg.cc:
 484         New test.
 485         * testsuite/25_algorithms/lower_bound/debug/constexpr_partitioned_neg.cc: New test.
 486         * testsuite/25_algorithms/lower_bound/debug/constexpr_partitioned_pred_neg.cc: New test.
 487         * testsuite/25_algorithms/lower_bound/debug/constexpr_valid_range_neg.cc: New test.
 488         * testsuite/25_algorithms/lower_bound/debug/partitioned_neg.cc: New test.
 489         * testsuite/25_algorithms/lower_bound/debug/partitioned_pred_neg.cc: New test.
 490         * testsuite/25_algorithms/upper_bound/debug/constexpr_partitioned_neg.cc: New test.
 491         * testsuite/25_algorithms/upper_bound/debug/constexpr_partitioned_pred_neg.cc: New test.
 492         * testsuite/25_algorithms/upper_bound/debug/constexpr_valid_range_neg.cc: New test.
 493         * testsuite/25_algorithms/upper_bound/debug/partitioned_neg.cc: New test.
 494         * testsuite/25_algorithms/upper_bound/debug/partitioned_pred_neg.cc: New test.
 495
 496 2020-11-09  Jonathan Wakely  <jwakely@redhat.com>
 497
 498         * include/bits/uniform_int_dist.h (__detail::_Power_of_2):
 499         Document that true result for zero is intentional.
 500
 501 2020-11-09  Jonathan Wakely  <jwakely@redhat.com>
 502
 503         * include/std/bit (__popcount): Remove redundant check for zero.
 504
 505 2020-11-09  Jonathan Wakely  <jwakely@redhat.com>
 506
 507         PR libstdc++/97729
 508         * libsupc++/exception_ptr.h (exception_ptr::exception_ptr())
 509         (exception_ptr::exception_ptr(const exception_ptr&))
 510         (exception_ptr::~exception_ptr()): Remove 'always_inline'
 511         attributes. Use 'inline' unconditionally.
 512
 513 2020-11-09  Jonathan Wakely  <jwakely@redhat.com>
 514
 515         PR libstdc++/97758
 516         * include/bits/std_function.h [!__cpp_rtti]: Include <typeinfo>.
 517
 518 2020-11-07  Liu Hao  <lh_mouse@126.com>
 519
 520         * libsupc++/cxxabi.h: (__cxa_atexit): mark with _GLIBCXX_CDTOR_CALLABI
 521         (__cxa_thread_atexit): ditto
 522         * libsupc++/atexit_thread.cc: (__cxa_atexit): mark with
 523         _GLIBCXX_CDTOR_CALLABI
 524         (__cxa_thread_atexit): ditto
 525         (elt): ditto
 526
 527 2020-11-06  Jonathan Wakely  <jwakely@redhat.com>
 528
 529         * config/abi/pre/gnu.ver (GLIBCXX_3.4.21): Tighten up patterns
 530         for basic_stringbuf that refer to __xfer_bufptrs.
 531
 532 2020-11-05  Marek Polacek  <polacek@redhat.com>
 533
 534         PR c++/25814
 535         * testsuite/20_util/reference_wrapper/lwg2993.cc: Add a dg-warning.
 536         * testsuite/25_algorithms/generate_n/87982_neg.cc: Likewise.
 537
 538 2020-11-05  Jonathan Wakely  <jwakely@redhat.com>
 539
 540         PR libstdc++/96269
 541         * include/std/optional (operator==, operator!=, operator<)
 542         (operator>, operator<=, operator>=): Fix types used in
 543         SFINAE constraints.
 544         * testsuite/20_util/optional/relops/96269.cc: New test.
 545
 546 2020-11-05  Jonathan Wakely  <jwakely@redhat.com>
 547
 548         PR libstdc++/97731
 549         * src/filesystem/dir.cc (recursive_directory_iterator): Call the
 550         right overload of _Dir::advance.
 551         * testsuite/experimental/filesystem/iterators/97731.cc: New test.
 552
 553 2020-11-05  Jonathan Wakely  <jwakely@redhat.com>
 554
 555         PR libstdc++/97729
 556         * include/std/future (__basic_future::_M_get_result): Use
 557         nullptr for null pointer constant.
 558         * libsupc++/eh_ptr.cc (operator==, operator!=): Remove
 559         definitions.
 560         * libsupc++/exception_ptr.h (_GLIBCXX_EH_PTR_USED): Define
 561         macro to conditionally add __attribute__((__used__)).
 562         (operator==, operator!=, exception_ptr::exception_ptr())
 563         (exception_ptr::exception_ptr(const exception_ptr&))
 564         (exception_ptr::~exception_ptr())
 565         (exception_ptr::operator=(const exception_ptr&))
 566         (exception_ptr::swap(exception_ptr&)): Always define as
 567         inline. Add macro to be conditionally "used".
 568
 569 2020-11-05  Jonathan Wakely  <jwakely@redhat.com>
 570
 571         PR libstdc++/97729
 572         * config/abi/pre/gnu.ver (GLIBCXX_3.4.29): Add exports.
 573         * src/c++20/sstream-inst.cc (basic_stringbuf): Instantiate
 574         private constructor taking __xfer_bufptrs.
 575
 576 2020-11-05  Jonathan Wakely  <jwakely@redhat.com>
 577
 578         * include/std/sstream (basic_stringbuf(const allocator_type&):
 579         Add explicit.
 580         (basic_stringbuf(const basic_string<C,T,SA>&, openmode, const A&)):
 581         Call _M_stringbuf_init. Construct _M_string from pointer and length
 582         to avoid constraint checks for string view.
 583         (basic_stringbuf::view()): Make __sv_type alias local to the
 584         function.
 585         (basic_istringstream(const basic_string<C,T,SA>&, openmode, const A&)):
 586         Pass string to _M_streambuf instead of constructing a temporary
 587         with the wrong allocator.
 588         (basic_ostringstream(const basic_string<C,T,SA>&, openmode, const A&)):
 589         Likewise.
 590         (basic_stringstream(const basic_string<C,T,SA>&, openmode, const A&)):
 591         Likewise.
 592         * src/c++20/sstream-inst.cc: Use string_view and wstring_view
 593         typedefs in explicit instantiations.
 594         * testsuite/27_io/basic_istringstream/cons/char/1.cc: Add more
 595         tests for constructors.
 596         * testsuite/27_io/basic_ostringstream/cons/char/1.cc: Likewise.
 597         * testsuite/27_io/basic_stringbuf/cons/char/1.cc: Likewise.
 598         * testsuite/27_io/basic_stringbuf/cons/char/2.cc: Likewise.
 599         * testsuite/27_io/basic_stringbuf/cons/wchar_t/1.cc: Likewise.
 600         * testsuite/27_io/basic_stringbuf/cons/wchar_t/2.cc: Likewise.
 601         * testsuite/27_io/basic_stringstream/cons/char/1.cc: Likewise.
 602
 603 2020-11-05  Jonathan Wakely  <jwakely@redhat.com>
 604
 605         * include/std/sstream: Adjust whitespace.
 606
 607 2020-11-04  Jonathan Wakely  <jwakely@redhat.com>
 608
 609         PR libstdc++/97719
 610         * include/std/sstream (basic_stringstream(string_type&&, openmode)):
 611         Fix default argument.
 612         * testsuite/27_io/basic_stringstream/cons/char/97719.cc: New test.
 613
 614 2020-11-04  Jonathan Wakely  <jwakely@redhat.com>
 615
 616         * testsuite/18_support/96817.cc: Fail fast if the library is
 617         configured to not use futexes.
 618
 619 2020-11-04  Jonathan Wakely  <jwakely@redhat.com>
 620
 621         PR libstdc++/94971
 622         * include/bits/stl_algo.h (search(FIter, FIter, const Searcher):
 623         Adjust #if condition.
 624         * include/parallel/algo.h (search(FIter, FIter, const Searcher&):
 625         Define new overload for C++17.
 626
 627 2020-11-04  Jonathan Wakely  <jwakely@redhat.com>
 628
 629         PR libstdc++/92285
 630         * doc/xml/manual/evolution.xml: Document change to base class.
 631         * doc/html/manual/api.html: Regenerate.
 632
 633 2020-11-04  Jonathan Wakely  <jwakely@redhat.com>
 634
 635         * include/bits/uniform_int_dist.h (uniform_int_distribution::_S_nd):
 636         Use qualified-id to refer to static member functions.
 637
 638 2020-11-03  Jonathan Wakely  <jwakely@redhat.com>
 639
 640         * include/std/syncstream: Include <bits/std_mutex.h>
 641         unconditionally.
 642
 643 2020-11-03  François Dumont  <fdumont@gcc.gnu.org>
 644
 645         * config/abi/pre/gnu-versioned-namespace.ver:
 646         Add __istream_extract and _Safe_local_iterator_base::_M_attach_single
 647         symbols.
 648
 649 2020-11-03  Jonathan Wakely  <jwakely@redhat.com>
 650
 651         * src/c++11/mutex.cc [_GLIBCXX_HAVE_TLS] (__once_proxy): Define
 652         separately for TLS targets.
 653         [!_GLIBCXX_HAVE_TLS] (__get_once_functor_lock_ptr): Replace with ...
 654         (set_lock_ptr): ... this. Set new value and return previous
 655         value.
 656         [!_GLIBCXX_HAVE_TLS] (__set_once_functor_lock_ptr): Adjust to
 657         use set_lock_ptr.
 658         [!_GLIBCXX_HAVE_TLS] (__once_proxy): Likewise.
 659
 660 2020-11-03  Jonathan Wakely  <jwakely@redhat.com>
 661
 662         PR libstdc++/55394
 663         PR libstdc++/66146
 664         PR libstdc++/84323
 665         * config/abi/pre/gnu.ver (GLIBCXX_3.4.29): Add new symbols.
 666         * include/std/mutex [!_GLIBCXX_HAS_GTHREADS] (once_flag): Define
 667         even when gthreads is not supported.
 668         (once_flag::_M_once) [_GLIBCXX_HAVE_LINUX_FUTEX]: Change type
 669         from __gthread_once_t to int.
 670         (once_flag::_M_passive(), once_flag::_M_activate())
 671         (once_flag::_M_finish(bool), once_flag::_Active_execution):
 672         Define new members for futex and non-threaded implementation.
 673         [_GLIBCXX_HAS_GTHREADS] (once_flag::_Prepare_execution): New
 674         RAII helper type.
 675         (call_once): Use new members of once_flag.
 676         * src/c++11/mutex.cc (std::once_flag::_M_activate): Define.
 677         (std::once_flag::_M_finish): Define.
 678         * testsuite/30_threads/call_once/39909.cc: Do not require
 679         gthreads.
 680         * testsuite/30_threads/call_once/49668.cc: Likewise.
 681         * testsuite/30_threads/call_once/60497.cc: Likewise.
 682         * testsuite/30_threads/call_once/call_once1.cc: Likewise.
 683         * testsuite/30_threads/call_once/dr2442.cc: Likewise.
 684         * testsuite/30_threads/call_once/once_flag.cc: Add test for
 685         constexpr constructor.
 686         * testsuite/30_threads/call_once/66146.cc: New test.
 687         * testsuite/30_threads/call_once/constexpr.cc: Removed.
 688         * testsuite/30_threads/once_flag/cons/constexpr.cc: Removed.
 689
 690 2020-11-03  Jonathan Yong  <10walls@gmail.com>
 691
 692         * src/Makefile.am (libstdc___la_LINK): Add lt_host_flags.
 693         * src/Makefile.in: Regenerate.
 694
 695 2020-11-02  Thomas Rodgers  <trodgers@redhat.com>
 696
 697         * doc/doxygen/user.cfg.in (INPUT): Add new header.
 698         * include/Makefile.am (std_headers): Add new header.
 699         * include/Makefile.in: Regenerate.
 700         * include/precompiled/stdc++.h: Include new header.
 701         * include/std/syncstream: New header.
 702         * include/std/version: Add __cpp_lib_syncbuf.
 703         * testsuite/27_io/basic_syncbuf/1.cc: New test.
 704         * testsuite/27_io/basic_syncbuf/2.cc: Likewise.
 705         * testsuite/27_io/basic_syncbuf/basic_ops/1.cc:
 706         Likewise.
 707         * testsuite/27_io/basic_syncbuf/requirements/types.cc:
 708         Likewise.
 709         * testsuite/27_io/basic_syncbuf/sync_ops/1.cc:
 710         Likewise.
 711         * testsuite/27_io/basic_syncstream/1.cc: Likewise.
 712         * testsuite/27_io/basic_syncstream/2.cc: Likewise.
 713         * testsuite/27_io/basic_syncstream/basic_ops/1.cc:
 714         Likewise.
 715         * testsuite/27_io/basic_syncstream/requirements/types.cc:
 716         Likewise.
 717
 718 2020-11-01  Jonathan Wakely  <jwakely@redhat.com>
 719
 720         * include/std/type_traits (is_integral<wchar_t>)
 721         (make_unsigned<wchar_t>, make_signed<wchar_t>): Define based
 722         on #ifdef __WCHAR_TYPE__ instead of _GLIBCXX_USE_WCHAR_T.
 723         * include/bits/cpp_type_traits.h (__is_integer<wchar_t>)
 724         (__is_char<wchar_t>): Likewise.
 725
 726 2020-10-31  François Dumont  <fdumont@gcc.gnu.org>
 727
 728         * src/c++17/floating_from_chars.cc (_GLIBCXX_USE_CX11_ABI): Add define.
 729         (buffering_string): New.
 730         [!_GLIBCXX_USE_CXX11_ABI](reserve_string): New.
 731         (from_chars): Adapt.
 732         * src/c++20/sstream-inst.cc: Limit instantiations to
 733         _GLIBCXX_USE_CXX11_ABI.
 734
 735 2020-10-31  Jonathan Wakely  <jwakely@redhat.com>
 736
 737         * include/bits/random.h (independent_bit_engine): Fix typo
 738         in comment.
 739         (shuffle_order_engine): Fix incorrect description in comment.
 740         * include/bits/random.tcc (__representable_as_double
 741         (__p1_representable_as_double): New helper functions.
 742         (shuffle_order_engine::operator()): Use double for calculation
 743         if (max() - min() + 1) is representable as double.
 744         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error
 745         line number.
 746
 747 2020-10-31  Jonathan Wakely  <jwakely@redhat.com>
 748
 749         PR libstdc++/96958
 750         * include/bits/hashtable_policy.h (_Prime_rehash_policy)
 751         (_Power2_rehash_policy): Use ceil and floor instead of ceill and
 752         floorl.
 753         * src/c++11/hashtable_c++0x.cc (_Prime_rehash_policy): Likewise.
 754         Use double instead of long double.
 755
 756 2020-10-31  Patrick Palka  <ppalka@redhat.com>
 757
 758         PR libstdc++/97600
 759         * include/std/ranges (basic_istream_view::begin): Initialize
 760         _Iterator from 'this' instead of '*this'.
 761         (basic_istream_view::_Iterator::_Iterator): Adjust constructor
 762         accordingly.
 763         (filter_view::_Iterator::_Iterator): Take a filter_view*
 764         argument instead of a filter_view& argument.
 765         (filter_view::_Sentinel::_Sentinel): Likewise.
 766         (filter_view::begin): Initialize _Iterator from 'this' instead
 767         of '*this'.
 768         (filter_view::end): Likewise.
 769         (transform_view::_Iterator::_Iterator): Take a _Parent* instead
 770         of a _Parent&.
 771         (filter_view::_Iterator::operator+): Adjust accordingly.
 772         (filter_view::_Iterator::operator-): Likewise.
 773         (filter_view::begin): Initialize _Iterator from 'this' instead
 774         of '*this'.
 775         (filter_view::end): Likewise.
 776         (join_view::_Iterator): Take a _Parent* instead of a _Parent&.
 777         (join_view::_Sentinel): Likewise.
 778         (join_view::begin): Initialize _Iterator from 'this' instead of
 779         '*this'.
 780         (join_view::end): Initialize _Sentinel from 'this' instead of
 781         '*this'.
 782         (split_view::_OuterIter): Take a _Parent& instead of a _Parent*.
 783         (split_view::begin): Initialize _OuterIter from 'this' instead
 784         of '*this'.
 785         (split_view::end): Likewise.
 786         * testsuite/std/ranges/97600.cc: New test.
 787
 788 2020-10-30  Jonathan Wakely  <jwakely@redhat.com>
 789
 790         * include/std/ranges (enable_borrowed_view<take_view<T>>)
 791         (enable_borrowed_view<drop_view<T>>)
 792         (enable_borrowed_view<drop_while_view<T>>)
 793         (enable_borrowed_view<reverse_view<T>>)
 794         (enable_borrowed_view<common_view<T>>)
 795         (enable_borrowed_view<elements_view<T>>): Add partial
 796         specializations as per P2017R1.
 797         * testsuite/std/ranges/adaptors/conditionally_borrowed.cc:
 798         New test.
 799
 800 2020-10-30  Jonathan Wakely  <jwakely@redhat.com>
 801
 802         PR libstdc++/96958
 803         * include/bits/hashtable_policy.h (_Prime_rehash_policy)
 804         (_Power2_rehash_policy): Use double instead of long double.
 805
 806 2020-10-30  Jonathan Wakely  <jwakely@redhat.com>
 807
 808         * testsuite/23_containers/vector/bool/modifiers/insert/31370.cc:
 809         Avoid -Wcatch-value warnings.
 810
 811 2020-10-30  Patrick Palka  <ppalka@redhat.com>
 812
 813         * include/std/ranges (__detail::__box): For the partial
 814         specialization used by types that are already semiregular,
 815         make the default constructor value-initialize the underlying
 816         object instead of default-initializing it.  Make its in place
 817         constructor explicit.
 818         * testsuite/std/ranges/adaptors/detail/semiregular_box.cc:
 819         Augment test.
 820
 821 2020-10-30  David Edelsohn  <dje.gcc@gmail.com>
 822
 823         * testsuite/20_util/unique_ptr/creation/for_overwrite.cc: XFAIL on AIX.
 824
 825 2020-10-29  Jonathan Wakely  <jwakely@redhat.com>
 826
 827         * config/abi/pre/gnu.ver (GLIBCXX_3.4.21): Tighten patterns
 828         for old <sstream> symbols some more.
 829
 830 2020-10-29  Jonathan Wakely  <jwakely@redhat.com>
 831
 832         * include/bits/ranges_util.h (subrange::subrange(R&&)): Use
 833         direct-initialization instead of list-initialization, so a
 834         potential narrowing conversion from ranges::size(r) to the
 835         stored size isn't ill-formed.
 836
 837 2020-10-29  Jonathan Wakely  <jwakely@redhat.com>
 838
 839         * include/bits/parse_numbers.h (_Select_int_base): Avoid
 840         narrowing conversion in constant expression.
 841         * include/experimental/buffer (buffer_copy): Avoid narrowing
 842         conversion.
 843         * include/experimental/internet (hash<>::operator()): Do not
 844         use deprecated 'argument_type' member.
 845         * include/std/variant (variant::emplace): Use cast instead
 846         of implicit conversion from size_t to narrower unsigned type.
 847
 848 2020-10-29  Jonathan Wakely  <jwakely@redhat.com>
 849
 850         * include/tr1/shared_ptr.h (__shared_count, __shared_ptr)
 851         (shared_ptr): Add diagnostic pragmas around uses of auto_ptr.
 852         * testsuite/tr1/2_general_utilities/shared_ptr/cons/43820_neg.cc:
 853         Adust dg-error line numbers.
 854
 855 2020-10-29  Jonathan Wakely  <jwakely@redhat.com>
 856
 857         * testsuite/18_support/96817.cc: Avoid -Wunused warnings.
 858         * testsuite/20_util/any/assign/2.cc: Likewise.
 859         * testsuite/20_util/any/cons/2.cc: Likewise.
 860         * testsuite/20_util/align/1.cc: Avoid -Wsign-compare warning.
 861         * testsuite/20_util/function/65760.cc: Avoid -Wunused warning.
 862         * testsuite/20_util/function/1.cc: Avoid -Wcatch-value warning.
 863         * testsuite/20_util/function/cons/move_target.cc: Avoid -Wunused
 864         warning.
 865         * testsuite/20_util/headers/memory/synopsis.cc: Add exception
 866         specification.
 867         * testsuite/20_util/monotonic_buffer_resource/allocate.cc: Avoid
 868         -Wsign-compare warning.
 869         * testsuite/20_util/tuple/cons/deduction.cc: Avoid -Wunused
 870         warning.
 871         * testsuite/20_util/specialized_algorithms/uninitialized_copy/808590-cxx11.cc:
 872         Avoid -Wdeprecated-copy warning.
 873         * testsuite/21_strings/basic_string/56166.cc: Avoid
 874         -Wcatch-value warning.
 875         * testsuite/21_strings/basic_string/numeric_conversions/char/stod.cc:
 876         Avoid -Wcatch-value warnings.
 877         * testsuite/21_strings/basic_string/numeric_conversions/char/stof.cc:
 878         Likewise.
 879         * testsuite/21_strings/basic_string/numeric_conversions/char/stoi.cc:
 880         Likewise.
 881         * testsuite/21_strings/basic_string/numeric_conversions/char/stol.cc:
 882         Likewise.
 883         * testsuite/21_strings/basic_string/numeric_conversions/char/stold.cc:
 884         Likewise.
 885         * testsuite/21_strings/basic_string/numeric_conversions/char/stoll.cc:
 886         Likewise.
 887         * testsuite/21_strings/basic_string/numeric_conversions/char/stoul.cc:
 888         Likewise.
 889         * testsuite/21_strings/basic_string/numeric_conversions/char/stoull.cc:
 890         Likewise.
 891         * testsuite/21_strings/basic_string/numeric_conversions/wchar_t/stod.cc:
 892         Likewise.
 893         * testsuite/21_strings/basic_string/numeric_conversions/wchar_t/stof.cc:
 894         Likewise.
 895         * testsuite/21_strings/basic_string/numeric_conversions/wchar_t/stoi.cc:
 896         Likewise.
 897         * testsuite/21_strings/basic_string/numeric_conversions/wchar_t/stol.cc:
 898         Likewise.
 899         * testsuite/21_strings/basic_string/numeric_conversions/wchar_t/stold.cc:
 900         Likewise.
 901         * testsuite/21_strings/basic_string/numeric_conversions/wchar_t/stoll.cc:
 902         Likewise.
 903         * testsuite/21_strings/basic_string/numeric_conversions/wchar_t/stoul.cc:
 904         Likewise.
 905         * testsuite/21_strings/basic_string/numeric_conversions/wchar_t/stoull.cc:
 906         Likewise.
 907         * testsuite/21_strings/basic_string_view/operations/compare/char/nonnull.cc:
 908         Prune additional diagnostics.
 909         * testsuite/21_strings/basic_string_view/operations/find/char/nonnull.cc:
 910         Likewise.
 911         * testsuite/21_strings/basic_string_view/operations/rfind/char/nonnull.cc:
 912         Likewise.
 913         * testsuite/21_strings/headers/string/synopsis.cc: Add exception
 914         specifications.
 915         * testsuite/22_locale/locale/cons/12352.cc: Define sized
 916         delete operators to avoid warnings.
 917         * testsuite/23_containers/deque/modifiers/swap/1.cc: Add
 918         exception specification.
 919         * testsuite/23_containers/forward_list/cons/11.cc: Avoid
 920         -Wdeprecated-copy warning.
 921         * testsuite/23_containers/headers/bitset/synopsis.cc: Add
 922         exception specification.
 923         * testsuite/23_containers/headers/deque/synopsis.cc: Likewise.
 924         * testsuite/23_containers/headers/forward_list/synopsis.cc:
 925         Likewise.
 926         * testsuite/23_containers/headers/list/synopsis.cc: Likewise.
 927         * testsuite/23_containers/headers/map/synopsis.cc: Likewise.
 928         * testsuite/23_containers/headers/queue/synopsis.cc: Likewise.
 929         * testsuite/23_containers/headers/set/synopsis.cc: Likewise.
 930         * testsuite/23_containers/headers/vector/synopsis.cc: Likewise.
 931         * testsuite/23_containers/list/modifiers/swap/1.cc: Likewise.
 932         * testsuite/23_containers/map/modifiers/swap/1.cc: Likewise.
 933         * testsuite/23_containers/multimap/modifiers/swap/1.cc:
 934         Likewise.
 935         * testsuite/23_containers/multiset/modifiers/swap/1.cc:
 936         Likewise.
 937         * testsuite/23_containers/set/modifiers/swap/1.cc: Likewise.
 938         * testsuite/23_containers/unordered_set/56267-2.cc: Avoid
 939         -Wdeprecated-copy warning.
 940         * testsuite/23_containers/vector/bool/23632.cc: Avoid
 941         -Wempty-body warning.
 942         * testsuite/23_containers/vector/modifiers/swap/1.cc: Add
 943         exception specification.
 944         * testsuite/25_algorithms/heap/moveable2.cc: Fix misplaced
 945         parentheses around arguments.
 946         * testsuite/25_algorithms/sample/1.cc: Use return value.
 947         * testsuite/25_algorithms/search/searcher.cc: Avoid -Wunused
 948         warnings.
 949         * testsuite/27_io/basic_ostream/exceptions/char/9561.cc:
 950         Likewise.
 951         * testsuite/27_io/basic_ostream/exceptions/wchar_t/9561.cc:
 952         Likewise.
 953         * testsuite/27_io/filesystem/operations/remove_all.cc: Avoid
 954         -Wsign-compare warning.
 955         * testsuite/experimental/any/assign/2.cc: Avoid -Wunused warnings.
 956         * testsuite/experimental/any/cons/2.cc: Likewise.
 957         * testsuite/experimental/filesystem/operations/remove_all.cc:
 958         Avoid -Wign-compare warning.
 959         * testsuite/experimental/memory/observer_ptr/cons/cons.cc:
 960         Likewise.
 961         * testsuite/experimental/memory_resource/null_memory_resource.cc:
 962         Likewise.
 963         * testsuite/experimental/source_location/1.cc: Avoid -Waddress
 964         warning.
 965         * testsuite/ext/pod_char_traits.cc: Avoid -Wunused warning.
 966         * testsuite/ext/vstring/modifiers/clear/56166.cc: Avoid
 967         -Wcatch-value.
 968         * testsuite/std/concepts/concepts.lang/concept.swappable/swap.cc:
 969         Avoid -Wunused warning.
 970         * testsuite/std/concepts/concepts.lang/concept.swappable/swappable.cc:
 971         Likewise.
 972         * testsuite/tr1/2_general_utilities/shared_ptr/cons/43820_neg.cc:
 973         Prune additional warnings.
 974         * testsuite/tr1/3_function_objects/function/1.cc: Avoid
 975         -Wcatch-value warning.
 976         * testsuite/util/replacement_memory_operators.h: Define sized
 977         delete to avoid warnings.
 978         * testsuite/util/testsuite_api.h (_NonDefaultConstructible): Add
 979         user-declared assignment operator to stop -Wdeprecated-copy
 980         warnings.
 981         * testsuite/util/testsuite_containers.h: Avoid -Wunused warning.
 982         * testsuite/util/testsuite_iterators.h: Avoid -Wsign-compare
 983         warnings.
 984         * testsuite/util/testsuite_new_operators.h: Define sized deleted.
 985
 986 2020-10-29  Jonathan Wakely  <jwakely@redhat.com>
 987
 988         * testsuite/25_algorithms/all_of/constexpr.cc: Check result of
 989         the algorithm.
 990         * testsuite/25_algorithms/any_of/constexpr.cc: Likewise.
 991         * testsuite/25_algorithms/binary_search/constexpr.cc: Likewise.
 992         * testsuite/25_algorithms/copy_backward/constexpr.cc: Likewise.
 993         * testsuite/25_algorithms/count/constexpr.cc: Likewise.
 994         * testsuite/25_algorithms/equal/constexpr.cc: Likewise.
 995         * testsuite/25_algorithms/equal_range/constexpr.cc: Likewise.
 996         * testsuite/25_algorithms/fill/constexpr.cc: Likewise.
 997         * testsuite/25_algorithms/find_end/constexpr.cc: Likewise.
 998         * testsuite/25_algorithms/find_if/constexpr.cc: Likewise.
 999         * testsuite/25_algorithms/is_partitioned/constexpr.cc: Likewise.
1000         * testsuite/25_algorithms/is_permutation/constexpr.cc: Likewise.
1001         * testsuite/25_algorithms/is_sorted_until/constexpr.cc:
1002         Likewise.
1003         * testsuite/25_algorithms/lexicographical_compare/constexpr.cc:
1004         Likewise.
1005         * testsuite/25_algorithms/lower_bound/constexpr.cc: Likewise.
1006         * testsuite/25_algorithms/merge/constexpr.cc: Likewise.
1007         * testsuite/25_algorithms/mismatch/constexpr.cc: Likewise.
1008         * testsuite/25_algorithms/none_of/constexpr.cc: Likewise.
1009         * testsuite/25_algorithms/partition_copy/constexpr.cc: Likewise.
1010         * testsuite/25_algorithms/remove_copy/constexpr.cc: Likewise.
1011         * testsuite/25_algorithms/remove_copy_if/constexpr.cc: Likewise.
1012         * testsuite/25_algorithms/remove_if/constexpr.cc: Likewise.
1013         * testsuite/25_algorithms/replace_if/constexpr.cc: Likewise.
1014         * testsuite/25_algorithms/reverse/constexpr.cc: Likewise.
1015         * testsuite/25_algorithms/reverse_copy/constexpr.cc: Likewise.
1016         * testsuite/25_algorithms/rotate_copy/constexpr.cc: Likewise.
1017         * testsuite/25_algorithms/search/constexpr.cc: Likewise.
1018         * testsuite/25_algorithms/set_difference/constexpr.cc: Likewise.
1019         * testsuite/25_algorithms/set_intersection/constexpr.cc:
1020         Likewise.
1021         * testsuite/25_algorithms/set_symmetric_difference/constexpr.cc:
1022         Likewise.
1023         * testsuite/25_algorithms/set_union/constexpr.cc: Likewise.
1024         * testsuite/25_algorithms/unique_copy/constexpr.cc: Likewise.
1025         * testsuite/25_algorithms/upper_bound/constexpr.cc: Likewise.
1026
1027 2020-10-29  Jonathan Wakely  <jwakely@redhat.com>
1028
1029         * include/bits/uniform_int_dist.h (_Power_of_two): Add
1030         constexpr.
1031         (uniform_int_distribution::_S_nd): Add static_assert to ensure
1032         the wider type is twice as wide as the result type.
1033         (uniform_int_distribution::__generate_impl): Add static_assert
1034         and declare variables as constexpr where appropriate.
1035         (uniform_int_distribution:operator()): Likewise. Only consider
1036         the uniform random bit generator's range of possible results
1037         when deciding whether _S_nd can be used, not the __uctype type.
1038
1039 2020-10-29  Jonathan Wakely  <jwakely@redhat.com>
1040
1041         * include/ext/rope (_Refcount_Base::_M_ref_count): Remove
1042         volatile qualifier.
1043         (_Refcount_Base::_M_decr()): Likewise.
1044
1045 2020-10-29  Jonathan Wakely  <jwakely@redhat.com>
1046
1047         * include/bits/std_function.h (_Function_handler<void, void>):
1048         Define explicit specialization used for invalid target types.
1049         (_Base_manager::_M_manager) [!__cpp_rtti]: Return null.
1050         (function::target_type()): Check for null pointer.
1051         (function::target()): Define unconditionall. Fix bug with
1052         const_cast of function pointer type.
1053         (function::target() const): Define unconditionally, but
1054         only use RTTI if enabled.
1055         * testsuite/20_util/function/target_no_rtti.cc: New test.
1056
1057 2020-10-29  Patrick Palka  <ppalka@redhat.com>
1058
1059         * testsuite/25_algorithms/lexicographical_compare/constrained.cc:
1060         (test03): Fix initializing the vector vy with the array y of size 4.
1061
1062 2020-10-29  Jonathan Wakely  <jwakely@redhat.com>
1063
1064         * include/bits/hashtable_policy.h (_Local_iterator_base): Cast
1065         value to avoid -Wsign-compare warnings.
1066         * include/bits/regex.h (sub_match::_M_str): Avoid narrowing
1067         conversion.
1068         * include/bits/regex_compiler.tcc (_Compiler::_M_quantifier):
1069         Initialize variable to avoid -Wmaybe-uninitialized warning.
1070         * include/bits/shared_ptr_base.h (_Sp_counted_deleter::_Impl):
1071         Reorder mem-initializer-list to avoid -Wreorder warning.
1072         * include/bits/stl_tree.h (_Rb_tree_impl): Explicitly
1073         initialize base class in copy constructor.
1074         * include/debug/safe_iterator.h (_Safe_iterator): Likewise.
1075         * include/ext/debug_allocator.h: Reorder mem-initializer-list
1076         to avoid -Wreorder warning.
1077         * include/ext/throw_allocator.h (throw_allocator_limit)
1078         (throw_allocator_random): Add user-declared assignment operators
1079         to avoid -Wdeprecated-copy warnings.
1080
1081 2020-10-29  Jonathan Wakely  <jwakely@redhat.com>
1082
1083         * include/bits/uniform_int_dist.h (uniform_int_distribution):
1084         Rename _UniformRandomNumberGenerator template parameters to
1085         _UniformRandomBitGenerator, as per P0346R1.
1086
1087 2020-10-29  Jonathan Wakely  <jwakely@redhat.com>
1088
1089         * include/std/sstream (basic_stringbuf(__string_type&&, openmode)):
1090         Call _M_init_syncbuf to set up get/put areas. Also qualify
1091         std::move.
1092
1093 2020-10-28  Jonathan Wakely  <jwakely@redhat.com>
1094
1095         * config/abi/pre/gnu.ver (GLIBCXX_3.4.29): Remove duplicate
1096         patterns.
1097         (CXXABI_1.3.13): Restore missing piece.
1098
1099 2020-10-28  Thomas Rodgers  <trodgers@redhat.com>
1100
1101         * acinclude.m4 (glibcxx_SUBDIRS): Add src/c++20.
1102         * config/abi/pre/gnu.ver (GLIBCXX_3.4.29): New symbols.
1103         * configure: Regenerate.
1104         * include/std/sstream:
1105         (basic_stringbuf::basic_stringbuf(allocator const&)): New constructor.
1106         (basic_stringbuf::basic_stringbuf(openmode, allocator const&)): Likewise.
1107         (basic_stringbuf::basic_stringbuf(basic_string&&, openmode)): Likewise.
1108         (basic_stringbuf::basic_stringbuf(basic_stringbuf&&, allocator const&)):
1109         Likewise.
1110         (basic_stringbuf::get_allocator()): New method.
1111         (basic_stringbuf::view()): Likewise.
1112         (basic_istringstream::basic_istringstream(basic_string&&, openmode)):
1113         New constructor.
1114         (basic_istringstream::basic_istringstream(openmode, allocator const&)):
1115         Likewise
1116         (basic_istringstream::view()): New method.
1117         (basic_ostringstream::basic_ostringstream(basic_string&&, openmode)):
1118         New constructor.
1119         (basic_ostringstream::basic_ostringstream(openmode, allocator const&)):
1120         Likewise
1121         (basic_ostringstream::view()): New method.
1122         (basic_stringstream::basic_stringstream(basic_string&&, openmode)):
1123         New constructor.
1124         (basic_stringstream::basic_stringstream(openmode, allocator const&)):
1125         Likewise
1126         (basic_stringstream::view()): New method.
1127         * src/Makefile.in: Add c++20 directory.
1128         * src/Makefile.am: Regenerate.
1129         * src/c++20/Makefile.am: Add makefile for new sub-directory.
1130         * src/c++20/Makefile.in: Generate.
1131         * src/c++20/sstream-inst.cc: New file defining explicit
1132         instantiations for basic_stringbuf, basic_istringstream,
1133         basic_ostringstream, and basic_stringstream member functions
1134         added in C++20.
1135         * testsuite/27_io/basic_stringbuf/cons/char/2.cc: New test.
1136         * testsuite/27_io/basic_stringbuf/cons/wchar_t/2.cc: Likewise.
1137         * testsuite/27_io/basic_stringbuf/view/char/1.cc: Likewise.
1138         * testsuite/27_io/basic_stringbuf/view/wchar_t/1.cc: Likewise.
1139         * testsuite/27_io/basic_istringstream/cons/char/1.cc: Likewise.
1140         * testsuite/27_io/basic_istringstream/cons/wchar_t/1.cc: Likewise.
1141         * testsuite/27_io/basic_istringstream/view/char/1.cc: Likewise.
1142         * testsuite/27_io/basic_istringstream/view/wchar_t/1.cc: Likewise.
1143         * testsuite/27_io/basic_ostringstream/cons/char/1.cc: Likewise.
1144         * testsuite/27_io/basic_ostringstream/cons/wchar_t/1.cc: Likewise.
1145         * testsuite/27_io/basic_ostringstream/view/char/1.cc: Likewise.
1146         * testsuite/27_io/basic_ostringstream/view/wchar_t/1.cc: Likewise.
1147         * testsuite/27_io/basic_stringstream/cons/char/1.cc: Likewise.
1148         * testsuite/27_io/basic_stringstream/cons/wchar_t/1.cc: Likewise.
1149         * testsuite/27_io/basic_stringstream/view/char/1.cc: Likewise.
1150         * testsuite/27_io/basic_stringstream/view/wchar_t/1.cc: Likewise.
1151
1152 2020-10-28  Patrick Palka  <ppalka@redhat.com>
1153
1154         PR libstdc++/97613
1155         * include/std/chrono (year_month_weekday::operator sys_days):
1156         Cast the result of index() to int so that the initializer for
1157         days{} is sign-extended when it's converted to the underlying
1158         type.
1159         * testsuite/std/time/year_month_weekday/3.cc: New test.
1160
1161 2020-10-28  Jonathan Wakely  <jwakely@redhat.com>
1162
1163         * libsupc++/new_opnt.cc (new): Add comment about forced unwind
1164         exceptions.
1165
1166 2020-10-28  Jonathan Wakely  <jwakely@redhat.com>
1167
1168         PR libstdc++/94268
1169         * config/os/mingw32-w64/os_defines.h (_GLIBCXX_BUFSIZ):
1170         Define.
1171         * config/os/mingw32/os_defines.h (_GLIBCXX_BUFSIZ):
1172         Define.
1173         * include/bits/fstream.tcc: Use _GLIBCXX_BUFSIZ instead
1174         of BUFSIZ.
1175         * include/ext/stdio_filebuf.h: Likewise.
1176         * include/std/fstream (_GLIBCXX_BUFSIZ): Define.
1177
1178 2020-10-28  Jonathan Wakely  <jwakely@redhat.com>
1179
1180         PR libstdc++/95592
1181         * include/bits/valarray_after.h (_DEFINE_EXPR_UNARY_OPERATOR)
1182         (_DEFINE_EXPR_BINARY_OPERATOR, _DEFINE_EXPR_BINARY_FUNCTION):
1183         Use elaborated-type-specifier and qualified-id to avoid
1184         ambiguities with QNX system headers.
1185         * testsuite/26_numerics/valarray/95592.cc: New test.
1186
1187 2020-10-28  Jonathan Wakely  <jwakely@redhat.com>
1188
1189         PR libstdc++/95609
1190         * include/std/span (span): Reorder data members to match common
1191         implementations of struct iovec.
1192         * testsuite/23_containers/span/layout_compat.cc: New test.
1193
1194 2020-10-27  Jonathan Wakely  <jwakely@redhat.com>
1195
1196         * include/std/functional (std::_Placeholder): Define for C++98
1197         as well as later standards.
1198         * include/tr1/functional (std::placeholders::_1 etc): Declare
1199         for C++98.
1200         (tr1::_Placeholder): Replace with using-declaration for
1201         std::_Placeholder.
1202         (tr1::placeholders::_1 etc.): Replace with using-directive for
1203         std::placeholders.
1204
1205 2020-10-27  Jonathan Wakely  <jwakely@redhat.com>
1206
1207         * include/tr1/ell_integral.tcc (__ellint_rf, __ellint_rd)
1208         (__ellint_rc, __ellint_rj): Remove unused variables.
1209         * include/tr1/modified_bessel_func.tcc (__airy): Likewise.
1210
1211 2020-10-27  Jonathan Wakely  <jwakely@redhat.com>
1212
1213         * include/bits/locale_conv.h (__str_codecvt_out_all):
1214         Add cast to compare operands of the same signedness.
1215         * include/bits/locale_facets_nonio.tcc
1216         (time_get::_M_extract_wday_or_month): Likewise.
1217         * include/bits/sstream.tcc (basic_stringbuf::overflow):
1218         Likewise.
1219         * include/tr1/legendre_function.tcc (__sph_legendre): Use
1220         unsigned for loop variable.
1221
1222 2020-10-27  Jonathan Wakely  <jwakely@redhat.com>
1223
1224         * include/std/charconv (from_chars): Add noexcept to match
1225         definitions in src/c++17/floating_from_chars.cc
1226
1227 2020-10-27  Jonathan Wakely  <jwakely@redhat.com>
1228
1229         * src/c++17/fs_dir.cc (fs::directory_iterator::operator*):
1230         Add noexcept. Do not throw on precondition violation.
1231
1232 2020-10-27  Jonathan Wakely  <jwakely@redhat.com>
1233
1234         * include/bits/fs_path.h (path::_List::begin, path::_List::end):
1235         Add noexcept to match definitions in src/c++17/fs_path.cc.
1236
1237 2020-10-27  Jonathan Wakely  <jwakely@redhat.com>
1238
1239         * testsuite/experimental/memory_resource/new_delete_resource.cc:
1240         Add missing <cstdint> header.
1241         * testsuite/experimental/memory_resource/resource_adaptor.cc:
1242         Likewise.
1243
1244 2020-10-26  Jonathan Wakely  <jwakely@redhat.com>
1245
1246         * include/experimental/executor (strand::_State): Fix thinko.
1247
1248 2020-10-26  Ville Voutilainen  <ville.voutilainen@gmail.com>
1249
1250         * include/std/type_traits (__is_nt_constructible_impl): Remove.
1251         (__is_nothrow_constructible_impl): Adjust.
1252         (is_nothrow_default_constructible): Likewise.
1253         (__is_nt_assignable_impl): Remove.
1254         (__is_nothrow_assignable_impl): Adjust.
1255
1256 2020-10-26  Jonathan Wakely  <jwakely@redhat.com>
1257
1258         PR libstdc++/97570
1259         * libsupc++/new_opa.cc: Declare size_t in global namespace.
1260         Remove unused header.
1261
1262 2020-10-26  Stephan Bergmann  <sbergman@redhat.com>
1263
1264         * include/bits/shared_ptr_base.h
1265         (_Sp_counted_base::_M_add_ref_lock_nothrow(): Add noexcept to
1266         definitions to match declaration.
1267         (__shared_count(const __weak_count&, nothrow_t)): Add noexcept
1268         to declaration to match definition.
1269
1270 2020-10-23  Patrick Palka  <ppalka@redhat.com>
1271
1272         * include/std/ranges (single_view::single_view): Mark the
1273         in place constructor explicit as per LWG 3428.
1274         (take_view): Remove the constraint on the deduction guide's
1275         template parameter as per LWG 3447.
1276
1277 2020-10-23  Jonathan Wakely  <jwakely@redhat.com>
1278
1279         * include/experimental/memory_resource: Include <tuple>.
1280         (polymorphic_allocator::construct): Qualify forward_as_tuple.
1281         * include/std/memory_resource: Likewise.
1282
1283 2020-10-22  Jonathan Wakely  <jwakely@redhat.com>
1284
1285         * testsuite/30_threads/condition_variable/members/68519.cc:
1286         Define recent_epoch_float_clock::duration to meet the Cpp17Clock
1287         requirements.
1288
1289 2020-10-22  Jonathan Wakely  <jwakely@redhat.com>
1290
1291         * include/std/shared_mutex: Only include <condition_variable>
1292         when pthread_rwlock_t and POSIX timers are not available.
1293         (__cpp_lib_shared_mutex, __cpp_lib_shared_timed_mutex): Change
1294         value to be type 'long'.
1295         * include/std/version (__cpp_lib_shared_mutex)
1296         (__cpp_lib_shared_timed_mutex): Likewise.
1297
1298 2020-10-22  Jonathan Wakely  <jwakely@redhat.com>
1299
1300         * include/Makefile.am: Add new header.
1301         * include/Makefile.in: Regenerate.
1302         * include/bits/shared_ptr.h: Include <iosfwd>.
1303         * include/bits/shared_ptr_base.h: Include required headers here
1304         directly, instead of in <memory>.
1305         * include/bits/uses_allocator_args.h: New file. Move utility
1306         functions for uses-allocator construction from <memory> to here.
1307         Only define the utility functions when concepts are available.
1308         (__cpp_lib_make_obj_using_allocator): Define non-standard
1309         feature test macro.
1310         * include/std/condition_variable: Remove unused headers.
1311         * include/std/future: Likewise.
1312         * include/std/memory: Remove headers that are not needed
1313         directly, and are now inclkuded where they're needed. Include
1314         new <bits/uses_allocator_args.h> header.
1315         * include/std/memory_resource: Include only the necessary
1316         headers. Use new feature test macro to detect support for the
1317         utility functions.
1318         * include/std/scoped_allocator: Likewise.
1319         * include/std/version (__cpp_lib_make_obj_using_allocator):
1320         Define.
1321
1322 2020-10-22  Olivier Hainque  <hainque@adacore.com>
1323
1324         * crossconfig.m4: Turn vxworks matcher into vxworks*.
1325         * configure.host: Likewise.
1326         * configure: Regenerate.
1327
1328 2020-10-21  Jonathan Wakely  <jwakely@redhat.com>
1329
1330         * include/bits/shared_ptr.h (shared_ptr(const weak_ptr&, nothrow_t)):
1331         Add noexcept.
1332         * include/bits/shared_ptr_base.h (_Sp_counted_base::_M_add_ref_lock):
1333         Remove specializations and just call _M_add_ref_lock_nothrow.
1334         (__shared_count, __shared_ptr): Use nullptr for null pointer
1335         constants.
1336         (__shared_count(const __weak_count&)): Use _M_add_ref_lock_nothrow
1337         instead of _M_add_ref_lock.
1338         (__shared_count(const __weak_count&, nothrow_t)): Add noexcept.
1339         (__shared_ptr::operator bool()): Add noexcept.
1340         (__shared_ptr(const __weak_ptr&, nothrow_t)): Add noexcept.
1341
1342 2020-10-21  Jonathan Wakely  <jwakely@redhat.com>
1343
1344         PR libstdc++/97512
1345         * include/bits/ranges_util.h (tuple_size<subrange>)
1346         (tuple_element<I, cv subrange>): Move here from ...
1347         * include/std/ranges: ... here.
1348         * testsuite/std/ranges/subrange/97512.cc: New test.
1349
1350 2020-10-21  Thomas Rodgers  <trodgers@redhat.com>
1351
1352         * include/pstl/algorithm_impl.h: Update file.
1353         * include/pstl/execution_impl.h: Likewise.
1354         * include/pstl/glue_algorithm_impl.h: Likewise.
1355         * include/pstl/glue_memory_impl.h: Likewise.
1356         * include/pstl/glue_numeric_impl.h: Likewise.
1357         * include/pstl/memory_impl.h: Likewise.
1358         * include/pstl/numeric_impl.h: Likewise.
1359         * include/pstl/parallel_backend.h: Likewise.
1360         * include/pstl/parallel_backend_serial.h: Likewise.
1361         * include/pstl/parallel_backend_tbb.h: Likewise.
1362         * include/pstl/parallel_backend_utils.h: Likewise.
1363         * include/pstl/pstl_config.h: Likewise.
1364         * include/pstl/unseq_backend_simd.h: Likewise.
1365
1366 2020-10-20  François Dumont  <fdumont@gcc.gnu.org>
1367
1368         * include/bits/hashtable_policy.h
1369         (_Hash_node_value_base<>): Remove _Hash_node_base inheritance.
1370         (_Hash_node_code_cache<bool _Cache_hash_code>): New.
1371         (_Hash_node_value<typename _Value, bool _Cache_hash_code>): New.
1372         (_Hash_node<>): Inherits _Hash_node_base<> and _Hash_node_value<>.
1373         (_Map_base<>::__node_type): Remove.
1374         (_Map_base<>::iterator): Remove.
1375         (_Insert_base<>::__hash_cached): New.
1376         (_Insert_base<>::__constant_iterators): New.
1377         (_Insert_base<>::__hashtable_alloc): New.
1378         (_Insert_base<>::__node_type): Remove.
1379         (_Insert_base<>::__node_ptr): New.
1380         (_Hash_code_base<>): Remove specializations.
1381         (_Hash_code_base<>::__node_type): Remove.
1382         (_Hash_code_base<>::_M_bucket_index(const __node_type*, size_t)):
1383         Replace by...
1384         (_Hash_code_base<>::_M_bucket_index(const _Hash_node_value<>&, size_t)):
1385         ...this.
1386         (_Hash_code_base<>::_M_store_code(__node_type*, __hash_code)):
1387         Replace by...
1388         (_Hash_code_base<>::_M_store_code(_Hash_node_code_cache<>&, __hash_code)):
1389         ...this.
1390         (_Hash_code_base<>::_M_copy_code(__node_type*, const __node_type*)):
1391         Replace by...
1392         (_Hash_code_base<>::_M_copy_code(_Hash_node_code_cache<>&,
1393         const _Hash_node_code_base<>&)): ...this.
1394         (_Hashtable_base<>::__constant_iterators): Remove.
1395         (_Hashtable_base<>::__unique_keys): Remove.
1396         (_Hashtable_base<>::__node_type): Remove.
1397         (_Hashtable_base<>::iterator): Remove.
1398         (_Hashtable_base<>::const_iterator): Remove.
1399         (_Hashtable_base<>::local_iterator): Remove.
1400         (_Hashtable_base<>::const_local_iterator): Remove.
1401         (_Hashtable_base<>::__ireturn_type): Remove.
1402         (_Hashtable_base<>::_Equal_hash_code<>::_S_equals): Replace by...
1403         (_Hashtable_base<>::_S_equals(__hash_code, const _Hash_node_code_hash<>&)):
1404         ...this.
1405         (_Hashtable_base<>::_Equal_hash_code<>::_S_node_equals): Replace by...
1406         (_Hashtable_base<>::_S_node_equals(__hash_code,
1407         const _Hash_node_code_hash<>&)): ...this.
1408         (_Hashtable_base<>::_Equal_hash_code<>): Remove.
1409         (_Hashtable_base<>::_M_equals): Adapt.
1410         (_Hashtable_baxe<>::_M_node_equals): Adapt.
1411         (_Equality<>::_M_equal): Adapt.
1412         (_Hashtable_alloc<>::__node_ptr): New.
1413         (_Hashtable_alloc<>::__bucket_type): Rename into...
1414         (_Hashtable_alloc<>::__node_base_ptr): ...this.
1415         (_Hashtable_alloc<>::__bucket_alloc_type): Rename into...
1416         (_Hashtable_alloc<>::__buckets_alloc_type): ...this.
1417         (_Hashtable_alloc<>::__bucket_alloc_traits): Rename into...
1418         (_Hashtable_alloc<>::__buckets_alloc_traits): ...this.
1419         (_Hashtable_alloc<>::__buckets_ptr): New.
1420         (_Hashtable_alloc<>::_M_allocate_node): Adapt.
1421         (_Hashtable_alloc<>::_M_deallocate_node): Adapt.
1422         (_Hashtable_alloc<>::_M_deallocate_node_ptr): Adapt.
1423         (_Hashtable_alloc<>::_M_deallocate_nodes): Adapt.
1424         (_Hashtable_alloc<>::_M_allocate_buckets): Adapt.
1425         (_Hashtable_alloc<>::_M_deallocate_buckets): Adapt.
1426         * include/bits/hashtable.h (_Hashtable<>): Adapt.
1427
1428 2020-10-20  Aldy Hernandez  <aldyh@redhat.com>
1429
1430         * testsuite/21_strings/basic_string/capacity/1.cc: Pass
1431         -Wno-stringop-overflow to test.
1432
1433 2020-10-20  Jonathan Wakely  <jwakely@redhat.com>
1434
1435         PR libstdc++/95917
1436         * include/std/coroutine (__noop_coro_frame): Replace with
1437         noop_coroutine_handle::__frame.
1438         (__dummy_resume_destroy): Define inline in __frame.
1439         (__noop_coro_fr): Replace with noop_coroutine_handle::_S_fr
1440         and define as inline.
1441         * testsuite/18_support/coroutines/95917.cc: New test.
1442
1443 2020-10-20  Jonathan Wakely  <jwakely@redhat.com>
1444
1445         * include/std/coroutine (coroutine_handle<_Promise>): Remove
1446         base class. Add constructors, conversions, accessors etc. as
1447         proposed for LWG 3460.
1448         (coroutine_handle<noop_coroutine_promise>): Likewise.
1449         * testsuite/18_support/coroutines/lwg3460.cc: New test.
1450
1451 2020-10-19  Jonathan Wakely  <jwakely@redhat.com>
1452
1453         * include/bits/unique_ptr.h (make_unique_for_overwrite): Define
1454         for C++20.
1455         * testsuite/20_util/unique_ptr/creation/array_neg.cc: Remove
1456         unused header. Adjust standard reference.
1457         * testsuite/20_util/unique_ptr/creation/for_overwrite.cc: New test.
1458         * testsuite/20_util/unique_ptr/creation/for_overwrite__neg.cc: New test.
1459
1460 2020-10-19  Jonathan Wakely  <jwakely@redhat.com>
1461
1462         * include/std/tuple (_Head_base<Idx, Head, true>): Use reserved
1463         form of __no_unique_address__ attribute because
1464         no_unique_address is not reserved prior to C++20.
1465
1466 2020-10-19  Jonathan Wakely  <jwakely@redhat.com>
1467
1468         * include/bits/node_handle.h (_Node_handle_common): Replace
1469         std::optional with custom type.
1470         * testsuite/20_util/variant/exception_safety.cc: Add missing
1471         header include.
1472
1473 2020-10-19  Jonathan Wakely  <jwakely@redhat.com>
1474
1475         * include/precompiled/expc++.h: Removed.
1476
1477 2020-10-17  Ville Voutilainen  <ville.voutilainen@gmail.com>
1478
1479         PR libstdc++/97449
1480         * include/std/variant
1481         (__gen_vtable_impl<>::_S_apply_single_alt):
1482         Diagnose visitor return type mismatches here..
1483         (__gen_vtable_impl</*base case*/>::_S_apply):
1484         ..not here.
1485
1486 2020-10-15  Jonathan Wakely  <jwakely@redhat.com>
1487
1488         * include/std/concepts: Fix typos in copyright notice.
1489         * include/std/ranges: Likewise.
1490
1491 2020-10-14  Jonathan Wakely  <jwakely@redhat.com>
1492
1493         PR libstdc++/97415
1494         * include/std/sstream (basic_stringbuf::str()): Check for
1495         null egptr() before comparing to non-null pptr().
1496
1497 2020-10-14  Jonathan Wakely  <jwakely@redhat.com>
1498
1499         * testsuite/21_strings/basic_string/modifiers/assign/char/move_assign_optim.cc:
1500         Do not generate debug info.
1501         * testsuite/21_strings/basic_string/modifiers/assign/wchar_t/move_assign_optim.cc:
1502         Likewise.
1503
1504 2020-10-14  Jonathan Wakely  <jwakely@redhat.com>
1505
1506         * include/bits/basic_string.h (basic_string(const Alloc&))
1507         (basic_string(const basic_string&)
1508         (basic_string(const CharT*, size_type, const Alloc&))
1509         (basic_string(const CharT*, const Alloc&))
1510         (basic_string(size_type, CharT, const Alloc&))
1511         (basic_string(initializer_list<CharT>, const Alloc&))
1512         (basic_string(InputIterator, InputIterator, const Alloc&)):
1513         Define inline in class body.
1514         * include/bits/basic_string.tcc (basic_string(const Alloc&))
1515         (basic_string(const basic_string&)
1516         (basic_string(const CharT*, size_type, const Alloc&))
1517         (basic_string(const CharT*, const Alloc&))
1518         (basic_string(size_type, CharT, const Alloc&))
1519         (basic_string(initializer_list<CharT>, const Alloc&))
1520         (basic_string(InputIterator, InputIterator, const Alloc&)):
1521         Move definitions into class body.
1522
1523 2020-10-14  Jonathan Wakely  <jwakely@redhat.com>
1524
1525         * testsuite/lib/libstdc++.exp (check_effective_target_cxx11-abi):
1526         Add comments about which test flags get used by the check.
1527
1528 2020-10-14  Jonathan Wakely  <jwakely@redhat.com>
1529
1530         * testsuite/21_strings/basic_string/allocator/char/copy.cc: Make
1531         comment more precise about what isn't supported by COW strings.
1532         * testsuite/21_strings/basic_string/allocator/char/copy_assign.cc:
1533         Likewise.
1534         * testsuite/21_strings/basic_string/allocator/char/move.cc:
1535         Likewise.
1536         * testsuite/21_strings/basic_string/allocator/char/move_assign.cc:
1537         Likewise.
1538         * testsuite/21_strings/basic_string/allocator/char/noexcept.cc:
1539         Likewise.
1540         * testsuite/21_strings/basic_string/allocator/char/operator_plus.cc:
1541         Likewise.
1542         * testsuite/21_strings/basic_string/allocator/char/swap.cc:
1543         Likewise.
1544         * testsuite/21_strings/basic_string/allocator/wchar_t/copy.cc:
1545         Likewise.
1546         * testsuite/21_strings/basic_string/allocator/wchar_t/copy_assign.cc:
1547         Likewise.
1548         * testsuite/21_strings/basic_string/allocator/wchar_t/move.cc:
1549         Likewise.
1550         * testsuite/21_strings/basic_string/allocator/wchar_t/move_assign.cc:
1551         Likewise.
1552         * testsuite/21_strings/basic_string/allocator/wchar_t/noexcept.cc:
1553         Likewise.
1554         * testsuite/21_strings/basic_string/allocator/wchar_t/operator_plus.cc:
1555         Likewise.
1556         * testsuite/21_strings/basic_string/allocator/wchar_t/swap.cc:
1557         Likewise.
1558
1559 2020-10-14  Jonathan Wakely  <jwakely@redhat.com>
1560
1561         * testsuite/21_strings/basic_string/allocator/char/minimal.cc:
1562         Do not require cxx11-abi effective target.
1563         * testsuite/21_strings/basic_string/allocator/wchar_t/minimal.cc:
1564         Likewise.
1565         * testsuite/27_io/basic_fstream/cons/base.cc: Likewise.
1566
1567 2020-10-14  Jonathan Wakely  <jwakely@redhat.com>
1568
1569         * include/bits/basic_string.h [!_GLIBCXX_USE_CXX11_ABI]
1570         (basic_string(const _CharT*, const _Alloc&)): Constrain to
1571         require an allocator-like type to fix CTAD ambiguity (LWG 3706).
1572         * testsuite/21_strings/basic_string/cons/char/deduction.cc:
1573         Remove dg-skip-if.
1574         * testsuite/21_strings/basic_string/cons/wchar_t/deduction.cc:
1575         Likewise.
1576
1577 2020-10-13  Nuno Lopes  <nuno.lopes@ist.utl.pt>
1578
1579         * include/bits/stl_algo.h (any_of): Fix incorrect description
1580         in comment.
1581
1582 2020-10-13  Jonathan Wakely  <jwakely@redhat.com>
1583
1584         * doc/xml/manual/evolution.xml: Document some API changes
1585         and deprecations.
1586         * doc/xml/manual/intro.xml: Document LWG 2499.
1587         * doc/xml/manual/status_cxx2020.xml: Update status.
1588         * doc/html/*: Regenerate.
1589
1590 2020-10-13  Jonathan Wakely  <jwakely@redhat.com>
1591
1592         * doc/xml/book.txml: Remove trailing whitespace.
1593         * doc/xml/chapter.txml: Likewise.
1594         * doc/xml/class.txml: Likewise.
1595         * doc/xml/gnu/fdl-1.3.xml: Likewise.
1596         * doc/xml/gnu/gpl-3.0.xml: Likewise.
1597         * doc/xml/manual/abi.xml: Likewise.
1598         * doc/xml/manual/algorithms.xml: Likewise.
1599         * doc/xml/manual/allocator.xml: Likewise.
1600         * doc/xml/manual/appendix_contributing.xml: Likewise.
1601         * doc/xml/manual/appendix_free.xml: Likewise.
1602         * doc/xml/manual/appendix_porting.xml: Likewise.
1603         * doc/xml/manual/atomics.xml: Likewise.
1604         * doc/xml/manual/auto_ptr.xml: Likewise.
1605         * doc/xml/manual/backwards_compatibility.xml: Likewise.
1606         * doc/xml/manual/bitmap_allocator.xml: Likewise.
1607         * doc/xml/manual/build_hacking.xml: Likewise.
1608         * doc/xml/manual/codecvt.xml: Likewise.
1609         * doc/xml/manual/concurrency.xml: Likewise.
1610         * doc/xml/manual/concurrency_extensions.xml: Likewise.
1611         * doc/xml/manual/configure.xml: Likewise.
1612         * doc/xml/manual/containers.xml: Likewise.
1613         * doc/xml/manual/ctype.xml: Likewise.
1614         * doc/xml/manual/debug.xml: Likewise.
1615         * doc/xml/manual/debug_mode.xml: Likewise.
1616         * doc/xml/manual/diagnostics.xml: Likewise.
1617         * doc/xml/manual/documentation_hacking.xml: Likewise.
1618         * doc/xml/manual/evolution.xml: Likewise.
1619         * doc/xml/manual/internals.xml: Likewise.
1620         * doc/xml/manual/intro.xml: Likewise.
1621         * doc/xml/manual/io.xml: Likewise.
1622         * doc/xml/manual/iterators.xml: Likewise.
1623         * doc/xml/manual/locale.xml: Likewise.
1624         * doc/xml/manual/localization.xml: Likewise.
1625         * doc/xml/manual/messages.xml: Likewise.
1626         * doc/xml/manual/mt_allocator.xml: Likewise.
1627         * doc/xml/manual/numerics.xml: Likewise.
1628         * doc/xml/manual/parallel_mode.xml: Likewise.
1629         * doc/xml/manual/policy_data_structures.xml: Likewise.
1630         * doc/xml/manual/prerequisites.xml: Likewise.
1631         * doc/xml/manual/shared_ptr.xml: Likewise.
1632         * doc/xml/manual/spine.xml: Likewise.
1633         * doc/xml/manual/status_cxxtr1.xml: Likewise.
1634         * doc/xml/manual/status_cxxtr24733.xml: Likewise.
1635         * doc/xml/manual/strings.xml: Likewise.
1636         * doc/xml/manual/support.xml: Likewise.
1637         * doc/xml/manual/test.xml: Likewise.
1638         * doc/xml/manual/test_policy_data_structures.xml: Likewise.
1639         * doc/xml/manual/using.xml: Likewise.
1640         * doc/xml/manual/using_exceptions.xml: Likewise.
1641         * doc/xml/manual/utilities.xml: Likewise.
1642         * doc/html/*: Regenerate.
1643
1644 2020-10-12  Patrick Palka  <ppalka@redhat.com>
1645
1646         * include/std/ranges (take_while_view::begin): Constrain the
1647         const overload further as per LWG 3450.
1648         (take_while_view::end): Likewise.
1649         * testsuite/std/ranges/adaptors/take_while.cc: Add test for LWG
1650         3450.
1651
1652 2020-10-12  Patrick Palka  <ppalka@redhat.com>
1653
1654         PR libstdc++/95322
1655         * include/std/ranges (take_view::_CI): Define this alias
1656         template as per LWG 3449 and remove ...
1657         (take_view::_Sentinel::_CI): ... this type alias.
1658         (take_view::_Sentinel::operator==): Adjust use of _CI
1659         accordingly.  Define a second overload that accepts an iterator
1660         of the opposite constness as per LWG 3449.
1661         (take_while_view::_Sentinel::operator==): Likewise.
1662         * testsuite/std/ranges/adaptors/95322.cc: Add tests for LWG 3449.
1663
1664 2020-10-12  Jonathan Wakely  <jwakely@redhat.com>
1665
1666         * doc/doxygen/user.cfg.in: Update to Doxygen 1.8.20 format.
1667
1668 2020-10-12  Jonathan Wakely  <jwakely@redhat.com>
1669
1670         * doc/doxygen/user.cfg.in (PREDEFINED): Use __cplusplus=201703L
1671         so that C++17 features are documented.
1672
1673 2020-10-12  Jonathan Wakely  <jwakely@redhat.com>
1674
1675         * include/bits/stl_algobase.h (copy, move, copy_backward)
1676         (move_backward): Fix documentation for returned iterator.
1677
1678 2020-10-12  Martin Sebor  <msebor@redhat.com>
1679
1680         PR c++/97201
1681         * libsupc++/new (operator new): Add attribute alloc_size and malloc.
1682
1683 2020-10-11  Clement Chigot  <clement.chigot@atos.net>
1684
1685         * config/os/aix/t-aix: Add complementary mode object file to
1686         libstdc++fs.a
1687
1688 2020-10-10  Jonathan Wakely  <jwakely@redhat.com>
1689
1690         PR libstdc++/97362
1691         * doc/html/manual/source_code_style.html: Regenerate.
1692         * doc/xml/manual/appendix_contributing.xml: Add __deref to
1693         BADNAMES.
1694         * include/debug/functions.h (_Irreflexive_checker::__deref):
1695         Rename to __ref.
1696         * testsuite/17_intro/badnames.cc: Check __deref.
1697
1698 2020-10-10  Ville Voutilainen  <ville.voutilainen@gmail.com>
1699
1700         * include/std/variant (__check_visitor_result):
1701         Use size_t for indexes.
1702         (__check_visitor_results): Likewise.
1703
1704 2020-10-09  Ville Voutilainen  <ville.voutilainen@gmail.com>
1705
1706         PR libstdc++/95904
1707         * include/std/variant (__deduce_visit_result): Add a nested ::type.
1708         (__gen_vtable_impl</*base case*/>::_S_apply):
1709         Check the visitor return type.
1710         (__same_types): New.
1711         (__check_visitor_result): Likewise.
1712         (__check_visitor_results): Likewise.
1713         (visit(_Visitor&&, _Variants&&...)): Use __check_visitor_results
1714         in case we're visiting just one variant.
1715         * testsuite/20_util/variant/visit_neg.cc: Adjust.
1716
1717 2020-10-09  Jonathan Wakely  <jwakely@redhat.com>
1718
1719         PR libstdc++/97311
1720         * include/bits/random.tcc (seed_seq::generate): Use uint32_t for
1721         calculations. Also split the first loop into three loops to
1722         avoid branching on k on every iteration, resolving PR 94823.
1723         * testsuite/26_numerics/random/seed_seq/97311.cc: New test.
1724         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-erro
1725         line number.
1726
1727 2020-10-09  Daniel Lemire  <lemire@gmail.com>
1728
1729         * include/bits/uniform_int_dist.h (uniform_int_distribution::_S_nd):
1730         New member function implementing Lemire's "nearly divisionless"
1731         algorithm.
1732         (uniform_int_distribution::operator()): Use _S_nd when the range
1733         of the URBG is the full width of the result type.
1734
1735 2020-10-09  Jonathan Wakely  <jwakely@redhat.com>
1736
1737         * testsuite/Makefile.am: Set and export variable separately.
1738         * testsuite/Makefile.in: Regenerate.
1739
1740 2020-10-09  Jonathan Wakely  <jwakely@redhat.com>
1741
1742         * scripts/check_performance: Use gnu++11 instead of gnu++0x.
1743         * testsuite/Makefile.am (check-performance): Export CXXFLAGS to
1744         child process.
1745         * testsuite/Makefile.in: Regenerate.
1746
1747 2020-10-09  Jonathan Wakely  <jwakely@redhat.com>
1748
1749         * testsuite/performance/26_numerics/random_dist.cc: New test.
1750
1751 2020-10-09  Jonathan Wakely  <jwakely@redhat.com>
1752
1753         * testsuite/util/testsuite_performance.h (report_header): Remove
1754         unused variable.
1755
1756 2020-10-08  Patrick Palka  <ppalka@redhat.com>
1757
1758         PR libstdc++/95788
1759         * include/bits/ranges_uninitialized.h:
1760         (__construct_at_fn::operator()): Rewrite in terms of
1761         std::construct_at.  Declare it conditionally noexcept.  Qualify
1762         calls to declval in its requires-clause.
1763         * testsuite/20_util/specialized_algorithms/construct_at/95788.cc:
1764         New test.
1765
1766 2020-10-08  Jonathan Wakely  <jwakely@redhat.com>
1767
1768         PR libstdc++/82584
1769         * include/bits/random.tcc
1770         (discrete_distribution::param_type::_M_initialize)
1771         (piecewise_constant_distribution::param_type::_M_initialize)
1772         (piecewise_linear_distribution::param_type::_M_initialize):
1773         Add assertions for positive sums..
1774         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error
1775         line.
1776
1777 2020-10-08  Jonathan Wakely  <jwakely@redhat.com>
1778
1779         * include/bits/ios_base.h (ios_base::failure): Add constructors
1780         takeing error_code argument. Add code() member function.
1781         * testsuite/27_io/ios_base/failure/cxx11.cc: Allow test to
1782         run for the old ABI but do not check for derivation from
1783         std::system_error.
1784         * testsuite/27_io/ios_base/failure/error_code.cc: New test.
1785
1786 2020-10-08  Jonathan Wakely  <jwakely@redhat.com>
1787
1788         * include/bits/random.h (__detail::_Mod): Revert last change.
1789         (__detail::__mod): Do not use _Mod for a==0 case.
1790         * testsuite/26_numerics/random/linear_congruential_engine/operators/call.cc:
1791         Check other cases with a==0. Also check runtime results.
1792         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error
1793         line.
1794
1795 2020-10-07  Jonathan Wakely  <jwakely@redhat.com>
1796
1797         * include/bits/random.h (__detail::_Mod): Avoid divide by zero.
1798         * testsuite/26_numerics/random/linear_congruential_engine/operators/call.cc:
1799         New test.
1800
1801 2020-10-07  Jonathan Wakely  <jwakely@redhat.com>
1802
1803         * include/bits/random.h (seed_seq(initializer_list<T>)): Rename
1804         parameter to use reserved name.
1805         * include/bits/ranges_algo.h (shift_left, shift_right): Rename
1806         template parameters to use reserved name.
1807         * libsupc++/exception_ptr.h (exception_ptr): Likewise for
1808         parameters and local variables.
1809         * testsuite/17_intro/names.cc: Check "il". Do not check "d" and
1810         "y" in C++20 mode.
1811
1812 2020-10-06  Jonathan Wakely  <jwakely@redhat.com>
1813
1814         PR libstdc++/90295
1815         * config/abi/pre/gnu.ver (CXXABI_1.3.13): New symbol version.
1816         (exception_ptr::_M_addref(), exception_ptr::_M_release()):
1817         Export symbols.
1818         * libsupc++/eh_ptr.cc (exception_ptr::exception_ptr()):
1819         Remove out-of-line definition.
1820         (exception_ptr::exception_ptr(const exception_ptr&)):
1821         Likewise.
1822         (exception_ptr::~exception_ptr()): Likewise.
1823         (exception_ptr::operator=(const exception_ptr&)):
1824         Likewise.
1825         (exception_ptr::swap(exception_ptr&)): Likewise.
1826         (exception_ptr::_M_addref()): Add branch prediction.
1827         * libsupc++/exception_ptr.h (exception_ptr::operator bool):
1828         Add noexcept.
1829         [!_GLIBCXX_EH_PTR_COMPAT] (operator==, operator!=): Define
1830         inline as hidden friends. Remove declarations at namespace
1831         scope.
1832         (exception_ptr::exception_ptr()): Define inline.
1833         (exception_ptr::exception_ptr(const exception_ptr&)):
1834         Likewise.
1835         (exception_ptr::~exception_ptr()): Likewise.
1836         (exception_ptr::operator=(const exception_ptr&)):
1837         Likewise.
1838         (exception_ptr::swap(exception_ptr&)): Likewise.
1839         * testsuite/util/testsuite_abi.cc: Add CXXABI_1.3.13.
1840         * testsuite/18_support/exception_ptr/90295.cc: New test.
1841
1842 2020-10-06  Jonathan Wakely  <jwakely@redhat.com>
1843
1844         * include/std/ranges (join_view): Remove deduction guide.
1845         (views::join): Add explicit template argument list to prevent
1846         deducing the wrong type.
1847         * testsuite/std/ranges/adaptors/join.cc: Move test for LWG 3474
1848         here, from ...
1849         * testsuite/std/ranges/adaptors/join_lwg3474.cc: Removed.
1850
1851 2020-10-05  Jonathan Wakely  <jwakely@redhat.com>
1852
1853         * include/bits/regex.h: Use __int_traits<int> instead of
1854         std::numeric_limits<int>.
1855         * include/bits/uniform_int_dist.h: Use __int_traits<T>::__max
1856         instead of std::numeric_limits<T>::max().
1857         * include/bits/hashtable_policy.h: Use size_t(-1) instead of
1858         std::numeric_limits<size_t>::max().
1859         * include/std/regex: Include <ext/numeric_traits.h>.
1860         * include/std/string_view: Use typedef for __int_traits<int>.
1861         * src/c++11/hashtable_c++0x.cc: Use size_t(-1) instead of
1862         std::numeric_limits<size_t>::max().
1863         * testsuite/std/ranges/iota/96042.cc: Include <limits>.
1864         * testsuite/std/ranges/iota/difference_type.cc: Likewise.
1865         * testsuite/std/ranges/subrange/96042.cc: Likewise.
1866
1867 2020-10-05  Jonathan Wakely  <jwakely@redhat.com>
1868
1869         * include/std/numeric: Move all #include directives to the top
1870         of the header.
1871         * testsuite/26_numerics/gcd/gcd_neg.cc: Adjust dg-error line
1872         numbers.
1873         * testsuite/26_numerics/lcm/lcm_neg.cc: Likewise.
1874
1875 2020-10-05  Jonathan Wakely  <jwakely@redhat.com>
1876
1877         * config/abi/pre/gnu.ver: Add new symbol.
1878         * include/bits/functexcept.h (__throw_bad_array_new_length):
1879         Declare new function.
1880         * include/ext/malloc_allocator.h (malloc_allocator::allocate):
1881         Throw bad_array_new_length for impossible sizes (LWG 3190).
1882         * include/ext/new_allocator.h (new_allocator::allocate):
1883         Likewise.
1884         * include/std/memory_resource (polymorphic_allocator::allocate)
1885         (polymorphic_allocator::allocate_object): Use new function,
1886         __throw_bad_array_new_length.
1887         * src/c++11/functexcept.cc (__throw_bad_array_new_length):
1888         Define.
1889         * testsuite/20_util/allocator/lwg3190.cc: New test.
1890
1891 2020-10-05  Mike Crowe  <mac@mcrowe.com>
1892
1893         PR libstdc++/91486
1894         * include/bits/atomic_futex.h:
1895         (__atomic_futex_unsigned::_M_load_when_equal_until): Use target
1896         clock duration type when rounding.
1897         * testsuite/30_threads/async/async.cc (test_pr91486_wait_for):
1898         Rename from test_pr91486.
1899         (float_steady_clock): New class for test.
1900         (test_pr91486_wait_until): New test.
1901
1902 2020-10-05  Mike Crowe  <mac@mcrowe.com>
1903
1904         * testsuite/20_util/duration_cast/rounding_c++11.cc: Copy
1905         rounding.cc and alter to support compilation for C++11 and to
1906         test std::chrono::__detail::ceil.
1907
1908 2020-10-02  Jonathan Wakely  <jwakely@redhat.com>
1909
1910         * testsuite/29_atomics/atomic_float/value_init.cc: Use float
1911         instead of double so that __atomic_load_8 isn't needed.
1912
1913 2020-10-02  Jonathan Wakely  <jwakely@redhat.com>
1914
1915         * testsuite/18_support/96817.cc: Use terminate handler that
1916         calls _Exit(0).
1917
1918 2020-10-02  Patrick Palka  <ppalka@redhat.com>
1919
1920         * include/bits/stl_iterator.h (reverse_iterator::iter_move):
1921         Define for C++20 as per P0896.
1922         (reverse_iterator::iter_swap): Likewise.
1923         (move_iterator::operator*): Apply P0896 changes for C++20.
1924         (move_iterator::operator[]): Likewise.
1925         * testsuite/24_iterators/reverse_iterator/cust.cc: New test.
1926
1927 2020-10-01  Jonathan Wakely  <jwakely@redhat.com>
1928
1929         * config/cpu/arm/cxxabi_tweaks.h (_GLIBCXX_GUARD_TEST_AND_ACQUIRE):
1930         Do not try to dereference return value of __atomic_load_n.
1931
1932 2020-09-30  Jonathan Wakely  <jwakely@redhat.com>
1933
1934         * config/cpu/arm/cxxabi_tweaks.h (_GLIBCXX_GUARD_TEST_AND_ACQUIRE):
1935         (_GLIBCXX_GUARD_SET_AND_RELEASE): Define for EABI.
1936
1937 2020-09-30  Jonathan Wakely  <jwakely@redhat.com>
1938
1939         * include/bits/c++config (_GLIBCXX_HAVE_BUILTIN_IS_SAME):
1940         Define for GCC 11 or when !__is_identifier(__is_same).
1941         (_GLIBCXX_BUILTIN_IS_SAME_AS): Remove.
1942         * include/std/type_traits (is_same, is_same_v): Replace uses
1943         of _GLIBCXX_BUILTIN_IS_SAME_AS.
1944
1945 2020-09-28  Patrick Palka  <ppalka@redhat.com>
1946
1947         * include/std/ranges (filter_view): Declare the data member
1948         _M_base last instead of first, and adjust constructors' member
1949         initializer lists accordingly.
1950         (transform_view): Likewise.
1951         (take_view): Likewise.
1952         (take_while_view): Likewise.
1953         (drop_view): Likewise.
1954         (drop_while_view): Likewise.
1955         (join_view): Likewise.
1956         (split_view): Likewise (and tweak nearby formatting).
1957         (reverse_view): Likewise.
1958         * testsuite/std/ranges/adaptors/sizeof.cc: Update expected
1959         sizes.
1960
1961 2020-09-28  Patrick Palka  <ppalka@redhat.com>
1962
1963         * testsuite/std/ranges/adaptors/sizeof.cc: New test.
1964
1965 2020-09-28  Patrick Palka  <ppalka@redhat.com>
1966
1967         * include/bits/ranges_util.h (subrange::_M_end): Give it
1968         [[no_unique_address]].
1969         * testsuite/std/ranges/subrange/sizeof.cc: New test.
1970
1971 2020-09-28  Patrick Palka  <ppalka@redhat.com>
1972
1973         * include/std/ranges (iota_view::_M_bound): Give it
1974         [[no_unique_address]].
1975         * testsuite/std/ranges/iota/iota_view.cc: Check that an
1976         unbounded iota_view has minimal size.
1977
1978 2020-09-27  Clement Chigot  <clement.chigot@atos.net>
1979
1980         * config/os/aix/t-aix: Use $(AR) without -X32_64.
1981
1982 2020-09-26  Jonathan Wakely  <jwakely@redhat.com>
1983
1984         PR libstdc++/96817
1985         * include/ext/atomicity.h (__gnu_cxx::__is_single_threaded()):
1986         New function wrapping __libc_single_threaded if available.
1987         (__exchange_and_add_dispatch, __atomic_add_dispatch): Use it.
1988         * libsupc++/guard.cc (__cxa_guard_acquire, __cxa_guard_abort)
1989         (__cxa_guard_release): Likewise.
1990         * testsuite/18_support/96817.cc: New test.
1991
1992 2020-09-25  Jonathan Wakely  <jwakely@redhat.com>
1993
1994         * libsupc++/Makefile.am: Remove redundant -std=gnu++1z flags.
1995         * libsupc++/Makefile.in: Regenerate.
1996
1997 2020-09-24  Antony Polukhin  <antoshkka@gmail.com>
1998
1999         PR libstdc++/71579
2000         * include/std/type_traits (invoke_result, is_invocable)
2001         (is_invocable_r, is_nothrow_invocable, is_nothrow_invocable_r):
2002         Add static_asserts to make sure that the arguments of the type
2003         traits are not misused with incomplete types.
2004         * testsuite/20_util/invoke_result/incomplete_args_neg.cc: New test.
2005         * testsuite/20_util/is_invocable/incomplete_args_neg.cc: New test.
2006         * testsuite/20_util/is_invocable/incomplete_neg.cc: New test.
2007         * testsuite/20_util/is_nothrow_invocable/incomplete_args_neg.cc:
2008         New test.
2009         * testsuite/20_util/is_nothrow_invocable/incomplete_neg.cc: Check
2010         for error on incomplete type usage in trait.
2011
2012 2020-09-24  Patrick Palka  <ppalka@redhat.com>
2013
2014         * include/std/ranges (__detail::__boxable): Split out the
2015         associated constraints of __box into here.
2016         (__detail::__box): Use the __boxable concept.  Define a leaner
2017         partial specialization for semiregular types.
2018         (single_view::_M_value): Give it [[no_unique_address]].
2019         (filter_view::_M_pred): Likewise.
2020         (transform_view::_M_fun): Likewise.
2021         (take_while_view::_M_pred): Likewise.
2022         (drop_while_view::_M_pred):: Likewise.
2023         * testsuite/std/ranges/adaptors/detail/semiregular_box.cc: New
2024         test.
2025
2026 2020-09-24  Jonathan Wakely  <jwakely@redhat.com>
2027
2028         * doc/xml/manual/configure.xml: Correct name of option.
2029         * doc/html/*: Regenerate.
2030
2031 2020-09-22  Jonathan Wakely  <jwakely@redhat.com>
2032
2033         PR libstdc++/97167
2034         * src/c++17/fs_path.cc (path::_Parser::root_path()): Check
2035         for empty string before inspecting the first character.
2036         * testsuite/27_io/filesystem/path/append/source.cc: Append
2037         empty string_view to path.
2038
2039 2020-09-22  Glen Joseph Fernandes  <glenjofe@gmail.com>
2040
2041         * include/bits/align.h (align): Fix overflow handling.
2042         * testsuite/20_util/align/3.cc: New test.
2043
2044 2020-09-22  Jonathan Wakely  <jwakely@redhat.com>
2045
2046         * include/Makefile.am: Add new headers and adjust for renamed
2047         header.
2048         * include/Makefile.in: Regenerate.
2049         * include/bits/iterator_concepts.h: Adjust for renamed header.
2050         * include/bits/range_access.h (ranges::*): Move to new
2051         <bits/ranges_base.h> header.
2052         * include/bits/ranges_algobase.h: Include new <bits/ranges_base.h>
2053         header instead of <ranges>.
2054         * include/bits/ranges_algo.h: Include new <bits/ranges_util.h>
2055         header.
2056         * include/bits/range_cmp.h: Moved to...
2057         * include/bits/ranges_cmp.h: ...here.
2058         * include/bits/ranges_base.h: New header.
2059         * include/bits/ranges_util.h: New header.
2060         * include/experimental/string_view: Include new
2061         <bits/ranges_base.h> header.
2062         * include/std/functional: Adjust for renamed header.
2063         * include/std/ranges (ranges::view_base, ranges::enable_view)
2064         (ranges::dangling, ranges::borrowed_iterator_t): Move to new
2065         <bits/ranges_base.h> header.
2066         (ranges::view_interface, ranges::subrange)
2067         (ranges::borrowed_subrange_t): Move to new <bits/ranges_util.h>
2068         header.
2069         * include/std/span: Include new <bits/ranges_base.h> header.
2070         * include/std/string_view: Likewise.
2071         * testsuite/24_iterators/back_insert_iterator/pr93884.cc: Add
2072         missing <ranges> header.
2073         * testsuite/24_iterators/front_insert_iterator/pr93884.cc:
2074         Likewise.
2075
2076 2020-09-22  Jonathan Wakely  <jwakely@redhat.com>
2077
2078         PR libstdc++/96803
2079         * include/std/tuple
2080         (_Tuple_impl(allocator_arg_t, Alloc, const _Tuple_impl<U...>&)):
2081         Use correct value category in __use_alloc call.
2082         * testsuite/20_util/tuple/cons/96803.cc: Check with constructors
2083         that require correct value category to be used.
2084
2085 2020-09-22  Patrick Palka  <ppalka@redhat.com>
2086
2087         * include/std/span (span::front): Remove static_assert.
2088         (span::back): Likewise.
2089         (span::operator[]): Likewise.
2090         * testsuite/23_containers/span/back_neg.cc: Rewrite to verify
2091         that we check the preconditions of back() only when it's called.
2092         * testsuite/23_containers/span/front_neg.cc: Likewise for
2093         front().
2094         * testsuite/23_containers/span/index_op_neg.cc: Likewise for
2095         operator[].
2096
2097 2020-09-22  Patrick Palka  <ppalka@redhat.com>
2098
2099         * include/bits/stl_algo.h (__sample): Exit early when the
2100         input range is empty.
2101         * testsuite/25_algorithms/sample/3.cc: New test.
2102
2103 2020-09-22  Patrick Palka  <ppalka@redhat.com>
2104
2105         * include/bits/stl_algo.h (for_each_n): Mark constexpr for C++20.
2106         (search): Likewise for the overload that takes a searcher.
2107         * testsuite/25_algorithms/for_each/constexpr.cc: Test constexpr
2108         std::for_each_n.
2109         * testsuite/25_algorithms/search/constexpr.cc: Test constexpr
2110         std::search overload that takes a searcher.
2111
2112 2020-09-21  Jonathan Wakely  <jwakely@redhat.com>
2113
2114         * include/bits/c++config (__replacement_assert): Add noreturn
2115         attribute.
2116         (__glibcxx_assert_impl): Use __builtin_expect to hint that the
2117         assertion is expected to pass.
2118
2119 2020-09-21  Jonathan Wakely  <jwakely@redhat.com>
2120
2121         * include/std/ranges (drop_view::begin()): Adjust constraints
2122         to match the correct condition for O(1) ranges::next (LWG 3482).
2123         * testsuite/std/ranges/adaptors/drop.cc: Check that iterator is
2124         cached for non-sized_range.
2125
2126 2020-09-21  Jonathan Wakely  <jwakely@redhat.com>
2127
2128         * include/std/ranges (transform_view, elements_view): Relax
2129         constraints on operator- for iterators, as per LWG 3483.
2130         * testsuite/std/ranges/adaptors/elements.cc: Check that we
2131         can take the difference of two iterators from a non-random
2132         access range.
2133         * testsuite/std/ranges/adaptors/transform.cc: Likewise.
2134
2135 2020-09-21  Jonathan Wakely  <jwakely@redhat.com>
2136
2137         PR libstdc++/97132
2138         * include/bits/align.h (align) [!_GLIBCXX_USE_C99_STDINT_TR1]:
2139         Remove unused code.
2140         (assume_aligned): Do not use __builtin_assume_aligned during
2141         constant evaluation.
2142         * testsuite/20_util/assume_aligned/1.cc: Improve test.
2143         * testsuite/20_util/assume_aligned/97132.cc: New test.
2144
2145 2020-09-20  Jonathan Wakely  <jwakely@redhat.com>
2146
2147         PR libstdc++/97101
2148         * include/std/functional (bind_front): Fix order of parameters
2149         in is_nothrow_constructible_v specialization.
2150         * testsuite/20_util/function_objects/bind_front/97101.cc: New test.
2151
2152 2020-09-11  Thomas Rodgers  <trodgers@redhat.com>
2153
2154         * include/std/memory: Move #include <bits/align.h> inside C++11
2155         conditional includes.
2156
2157 2020-09-11  Thomas Rodgers  <trodgers@redhat.com>
2158
2159         * include/Makefile.am (bits_headers): Add new header.
2160         * include/Makefile.in: Regenerate.
2161         * include/bits/align.h: New file.
2162         * include/std/memory (align): Move definition to bits/align.h.
2163         (assume_aligned): Likewise.
2164
2165 2020-09-11  Jonathan Wakely  <jwakely@redhat.com>
2166
2167         * include/std/chrono [C++17] (chrono::__detail::ceil): Add
2168         using declaration to make chrono::ceil available for internal
2169         use with a consistent name.
2170         (chrono::__detail::__ceil_impl): New function template.
2171         (chrono::__detail::ceil): Use __ceil_impl to compare and
2172         increment the value. Remove SFINAE constraint.
2173
2174 2020-09-11  Jonathan Wakely  <jwakely@redhat.com>
2175
2176         * include/bits/regex_error.h (__throw_regex_error): Fix
2177         parameter declaration and use reserved attribute names.
2178
2179 2020-09-11  Mike Crowe  <mac@mcrowe.com>
2180
2181         * include/std/condition_variable (condition_variable::wait_until):
2182         Convert delta to steady_clock duration before adding to current
2183         steady_clock time to avoid rounding errors described in PR68519.
2184         (condition_variable::wait_for): Simplify calculation of absolute
2185         time by using chrono::__detail::ceil in both overloads.
2186         * testsuite/30_threads/condition_variable/members/68519.cc:
2187         (test_wait_for): Renamed from test01. Replace unassigned val
2188         variable with constant false. Reduce scope of mx and cv
2189         variables to just test_wait_for function.
2190         (test_wait_until): Add new test case.
2191
2192 2020-09-11  Mike Crowe  <mac@mcrowe.com>
2193
2194         PR libstdc++/91486
2195         * include/bits/atomic_futex.h
2196         (__atomic_futex_unsigned::_M_load_when_equal_for)
2197         (__atomic_futex_unsigned::_M_load_when_equal_until): Use
2198         __detail::ceil to convert delta to the reference clock
2199         duration type to avoid resolution problems.
2200         * include/std/chrono (__detail::ceil): Move implementation
2201         of std::chrono::ceil into private namespace so that it's
2202         available to pre-C++17 code.
2203         * testsuite/30_threads/async/async.cc (test_pr91486):
2204         Test __atomic_futex_unsigned::_M_load_when_equal_for.
2205
2206 2020-09-11  Mike Crowe  <mac@mcrowe.com>
2207
2208         * include/bits/atomic_futex.h
2209         (__atomic_futex_unsigned::_M_load_when_equal_until): Add
2210         loop on generic _Clock to check the timeout against _Clock
2211         again after _M_load_when_equal_until returns indicating a
2212         timeout.
2213         * testsuite/30_threads/async/async.cc: Invent slow_clock
2214         that runs at an eleventh of steady_clock's speed. Use it
2215         to test the user-supplied-clock variant of
2216         __atomic_futex_unsigned::_M_load_when_equal_until works
2217         generally with test03 and loops correctly when the timeout
2218         time hasn't been reached in test04.
2219
2220 2020-09-11  Mike Crowe  <mac@mcrowe.com>
2221
2222         PR libstdc++/93542
2223         * include/bits/atomic_futex.h (__atomic_futex_unsigned): Change
2224         __clock_t typedef to use steady_clock so that unknown clocks are
2225         synced to it rather than system_clock. Change existing __clock_t
2226         overloads of _M_load_and_text_until_impl and
2227         _M_load_when_equal_until to use system_clock explicitly. Remove
2228         comment about DR 887 since these changes address that problem as
2229         best as we currently able.
2230
2231 2020-09-11  Mike Crowe  <mac@mcrowe.com>
2232
2233         PR libstdc++/93542
2234         * config/abi/pre/gnu.ver: Update for addition of
2235         __atomic_futex_unsigned_base::_M_futex_wait_until_steady.
2236         * include/bits/atomic_futex.h (__atomic_futex_unsigned_base):
2237         Add comments to clarify that _M_futex_wait_until and
2238         _M_load_and_test_until use CLOCK_REALTIME.
2239         (__atomic_futex_unsigned_base::_M_futex_wait_until_steady)
2240         (__atomic_futex_unsigned_base::_M_load_and_text_until_steady):
2241         New member functions that use CLOCK_MONOTONIC.
2242         (__atomic_futex_unsigned_base::_M_load_and_test_until_impl)
2243         (__atomic_futex_unsigned_base::_M_load_when_equal_until): Add
2244         overloads that accept a steady_clock time_point and use the
2245         new member functions.
2246         * src/c++11/futex.cc: Include headers required for
2247         clock_gettime.
2248         (futex_clock_monotonic_flag): New constant to tell futex to
2249         use CLOCK_MONOTONIC to match existing futex_clock_realtime_flag.
2250         (futex_clock_monotonic_unavailable): New global to store the
2251         result of trying to use CLOCK_MONOTONIC.
2252         (__atomic_futex_unsigned_base::_M_futex_wait_until_steady): Add
2253         new variant of _M_futex_wait_until that uses CLOCK_MONOTONIC to
2254         support waiting using steady_clock.
2255
2256 2020-09-11  Mike Crowe  <mac@mcrowe.com>
2257
2258         * src/c++11/futex.cc: Add new constants for required futex
2259         flags.  Add futex_clock_realtime_unavailable flag to store
2260         result of trying to use FUTEX_CLOCK_REALTIME.
2261         (__atomic_futex_unsigned_base::_M_futex_wait_until): Try to
2262         use FUTEX_WAIT_BITSET with FUTEX_CLOCK_REALTIME and only
2263         fall back to using gettimeofday and FUTEX_WAIT if that's not
2264         supported.
2265
2266 2020-09-11  Mike Crowe  <mac@mcrowe.com>
2267
2268         * testsuite/30_threads/async/async.cc (test02): Test steady_clock
2269         with std::future::wait_until.
2270         (test03): Add new test templated on clock type waiting for future
2271         associated with async to resolve.
2272         (main): Call test03 to test both system_clock and steady_clock.
2273
2274 2020-09-11  Torbjörn SVENSSON  <torbjorn.svensson@st.com>
2275             Christophe Lyon  <christophe.lyon@linaro.org>
2276
2277         * libsupc++/eh_call.cc: Avoid warning with -fno-exceptions.
2278
2279 2020-09-11  Torbjörn SVENSSON  <torbjorn.svensson@st.com>
2280             Christophe Lyon  <christophe.lyon@linaro.org>
2281
2282         * libsupc++/eh_call.cc: Avoid warning with -fno-exceptions.
2283
2284 2020-09-11  Christophe Lyon  <christophe.lyon@linaro.org>
2285
2286         * include/bits/regex_error.h: Avoid warning with -fno-exceptions.
2287
2288 2020-09-10  Jonathan Wakely  <jwakely@redhat.com>
2289
2290         * include/bits/locale_conv.h (__do_str_codecvt, __str_codecvt_in_all):
2291         Add casts to compare types of the same signedness.
2292
2293 2020-09-10  Jonathan Wakely  <jwakely@redhat.com>
2294
2295         * include/bits/ranges_algobase.h (__equal_fn): Remove unused
2296         typedef.
2297
2298 2020-09-10  Jonathan Wakely  <jwakely@redhat.com>
2299
2300         * include/std/version (__cpp_lib_array_constexpr):
2301         (__cpp_lib_constexpr_char_traits): Only define C++17 value when
2302         compiling C++17.
2303
2304 2020-09-10  Jonathan Wakely  <jwakely@redhat.com>
2305
2306         * include/experimental/bits/shared_ptr.h (shared_ptr(auto_ptr&&))
2307         (operator=(auto_ptr&&)): Add diagnostic pragmas to suppress
2308         warnings for uses of std::auto_ptr.
2309         * include/experimental/type_traits (is_literal_type_v):
2310         Likewise, for use of std::is_literal_type.
2311         * include/std/condition_variable (condition_variable_any::_Unlock):
2312         Likewise, for use of std::uncaught_exception.
2313
2314 2020-09-10  Jonathan Wakely  <jwakely@redhat.com>
2315
2316         * include/bits/fs_path.h (path::_List::type()): Avoid narrowing
2317         conversion.
2318         * include/std/chrono (operator+(const year&, const years&)):
2319         Likewise.
2320
2321 2020-09-10  Jonathan Wakely  <jwakely@redhat.com>
2322
2323         * include/bits/codecvt.h (codecvt_byname): Remove names of
2324         unused parameters.
2325
2326 2020-09-10  Jonathan Wakely  <jwakely@redhat.com>
2327
2328         * include/bits/locale_facets_nonio.tcc: Adjust whitespace.
2329
2330 2020-09-10  Krystian Kuźniarek  <krystian.kuzniarek@gmail.com>
2331
2332         * include/c_global/cmath (__lerp): Avoid -Wparentheses warnings.
2333
2334 2020-09-10  Krystian Kuźniarek  <krystian.kuzniarek@gmail.com>
2335
2336         * include/bits/atomic_base.h: Fix -Wunused-variable
2337         warnings.
2338         * include/ext/new_allocator.h: Fix -Wunused-parameter
2339         warnings.
2340
2341 2020-09-10  Jonathan Wakely  <jwakely@redhat.com>
2342
2343         * include/bits/stl_iterator.h (counted_iterator): Add assertions
2344         to check preconditions added by LWG 3472.
2345
2346 2020-09-10  Jonathan Wakely  <jwakely@redhat.com>
2347
2348         PR libstdc++/94160
2349         * src/c++17/memory_resource.cc (munge_options): Round
2350         max_blocks_per_chunk to a multiple of four.
2351         (__pool_resource::_M_alloc_pools()): Simplify slightly.
2352         * testsuite/20_util/unsynchronized_pool_resource/allocate.cc:
2353         Check that valid pointers are returned when small values are
2354         used for max_blocks_per_chunk.
2355
2356 2020-09-10  Jonathan Wakely  <jwakely@redhat.com>
2357
2358         PR libstdc++/96942
2359         * include/std/memory_resource (monotonic_buffer_resource::do_allocate):
2360         Use __builtin_expect when checking if a new buffer needs to be
2361         allocated from the upstream resource, and for checks for edge
2362         cases like zero sized buffers and allocations.
2363         * src/c++17/memory_resource.cc (aligned_size): New class template.
2364         (aligned_ceil): New helper function to round up to a given
2365         alignment.
2366         (monotonic_buffer_resource::chunk): Replace _M_size and _M_align
2367         with an aligned_size member. Remove _M_canary member. Change _M_next
2368         to pointer instead of unaligned buffer.
2369         (monotonic_buffer_resource::chunk::allocate): Round up to multiple
2370         of 64 instead of to power of two. Check for size overflow. Remove
2371         redundant check for minimum required alignment.
2372         (monotonic_buffer_resource::chunk::release): Adjust for changes
2373         to data members.
2374         (monotonic_buffer_resource::_M_new_buffer): Use aligned_ceil.
2375         (big_block): Replace _M_size and _M_align with aligned_size
2376         member.
2377         (big_block::big_block): Check for size overflow.
2378         (big_block::size, big_block::align): Adjust to use aligned_size.
2379         (big_block::alloc_size): Use aligned_ceil.
2380         (munge_options): Use aligned_ceil.
2381         (__pool_resource::allocate): Use big_block::align for alignment.
2382         * testsuite/20_util/monotonic_buffer_resource/allocate.cc: Check
2383         upstream resource gets expected values for impossible sizes.
2384         * testsuite/20_util/unsynchronized_pool_resource/allocate.cc:
2385         Likewise. Adjust checks for expected alignment in existing test.
2386
2387 2020-09-07  Jonathan Wakely  <jwakely@redhat.com>
2388
2389         * include/std/chrono (duration::_S_gcd): Use invariant that
2390         neither value is zero initially.
2391
2392 2020-09-07  Jonathan Wakely  <jwakely@redhat.com>
2393
2394         * include/std/ranges (__box): Simplify constraints as per LWG 3477.
2395
2396 2020-09-03  Jonathan Wakely  <jwakely@redhat.com>
2397
2398         PR libstdc++/96592
2399         * include/std/tuple (_TupleConstraints<true, T...>): Use
2400         alternative is_constructible instead of std::is_constructible.
2401         * testsuite/20_util/tuple/cons/96592.cc: New test.
2402
2403 2020-09-03  Jonathan Wakely  <jwakely@redhat.com>
2404
2405         * include/std/chrono (duration::_S_gcd): Use iterative algorithm
2406         for C++14 and later.
2407         * include/std/numeric (__detail::__gcd): Replace recursive
2408         Euclidean algorithm with iterative version of binary GCD algorithm.
2409         * testsuite/26_numerics/gcd/1.cc: Test additional inputs.
2410         * testsuite/26_numerics/gcd/gcd_neg.cc: Adjust dg-error lines.
2411         * testsuite/26_numerics/lcm/lcm_neg.cc: Likewise.
2412         * testsuite/experimental/numeric/gcd.cc: Test additional inputs.
2413         * testsuite/26_numerics/gcd/2.cc: New test.
2414
2415 2020-09-02  Jonathan Wakely  <jwakely@redhat.com>
2416
2417         PR libstdc++/92978
2418         * testsuite/experimental/numeric/92978.cc: Use experimental::lcm
2419         not std::lcm.
2420
2421 2020-09-02  Jonathan Wakely  <jwakely@redhat.com>
2422
2423         PR libstdc++/96851
2424         * include/bits/cpp_type_traits.h (__is_memcmp_ordered):
2425         New trait that says if memcmp can be used for ordering.
2426         (__is_memcmp_ordered_with): Likewise, for two types.
2427         * include/bits/deque.tcc (__lex_cmp_dit): Use new traits
2428         instead of __is_byte and __numeric_traits.
2429         (__lexicographical_compare_aux1): Likewise.
2430         * include/bits/ranges_algo.h (__lexicographical_compare_fn):
2431         Likewise.
2432         * include/bits/stl_algobase.h (__lexicographical_compare_aux1)
2433         (__is_byte_iter): Likewise.
2434         * include/std/array (operator<=>): Likewise. Only use memcmp
2435         when std::is_constant_evaluated() is false.
2436         * testsuite/23_containers/array/comparison_operators/96851.cc:
2437         New test.
2438         * testsuite/23_containers/array/tuple_interface/get_neg.cc:
2439         Adjust dg-error line numbers.
2440
2441 2020-09-02  Jonathan Wakely  <jwakely@redhat.com>
2442
2443         * include/bits/stl_iterator.h: Include <bits/exception_defines.h>
2444         for definitions of __try, __catch and __throw_exception_again.
2445         (counted_iterator::operator++(int)): Use __throw_exception_again
2446         instead of throw.
2447         * libsupc++/new: Include <bits/exception.h> not <exception>.
2448         * libsupc++/new_opvnt.cc: Include <bits/exception_defines.h>.
2449         * testsuite/18_support/destroying_delete.cc: Include
2450         <type_traits> for std::is_same_v definition.
2451         * testsuite/20_util/variant/index_type.cc: Qualify size_t.
2452
2453 2020-09-01  Jonathan Wakely  <jwakely@redhat.com>
2454
2455         PR libstdc++/71960
2456         * include/bits/c++config (__glibcxx_assert_impl): Remove
2457         do-while so that uses of the macro need to add it.
2458         (__glibcxx_assert): Rename macro for runtime assertions
2459         to __glibcxx_assert_2.
2460         (__glibcxx_assert_1): Define macro for constexpr assertions.
2461         (__glibcxx_assert): Define macro for constexpr and runtime
2462         assertions.
2463         * include/bits/range_access.h (ranges::advance): Remove
2464         redundant precondition checks during constant evaluation.
2465         * include/parallel/base.h (_GLIBCXX_PARALLEL_ASSERT): Always
2466         use do-while in macro expansion.
2467         * include/std/ranges (iota_view::iota_view(W, B)): Remove
2468         redundant braces.
2469
2470 2020-09-01  Jonathan Wakely  <jwakely@redhat.com>
2471
2472         * include/std/chrono (duration::_S_gcd(intmax_t, intmax_t)):
2473         New helper function for finding GCD of two positive intmax_t
2474         values.
2475         (duration::__divide): New helper alias for dividing one period
2476         by another.
2477         (duration::__is_harmonic): Use __divide not ratio_divide.
2478         (duration(const duration<R2, P2>&)): Require the duration rep
2479         types to be convertible.
2480         * testsuite/20_util/duration/cons/dr2094.cc: New test.
2481         * testsuite/20_util/duration/requirements/reduced_period.cc:
2482         Fix definition of unused member functions in test type.
2483         * testsuite/20_util/duration/requirements/typedefs_neg2.cc:
2484         Adjust expected errors.
2485
2486 2020-08-29  Jonathan Wakely  <jwakely@redhat.com>
2487
2488         * include/std/numeric (__detail::__absu(bool)): Make deleted
2489         function a function template, so it will be chosen for calls
2490         with an explicit template argument list.
2491         * testsuite/26_numerics/gcd/gcd_neg.cc: Add dg-prune-output.
2492         * testsuite/26_numerics/lcm/lcm_neg.cc: Likewise.
2493
2494 2020-08-28  Jonathan Wakely  <jwakely@redhat.com>
2495
2496         * include/std/chrono (common_type): Fix partial specializations
2497         for a single duration type to use the common_type of the rep.
2498         (duration::operator+, duration::operator-): Fix return types
2499         to also use the common_type of the rep.
2500         * testsuite/20_util/duration/requirements/reduced_period.cc:
2501         Check duration using a rep that has common_type specialized.
2502
2503 2020-08-28  Jonathan Wakely  <jwakely@redhat.com>
2504
2505         PR libstdc++/92978
2506         * include/std/numeric (__abs_integral): Replace with ...
2507         (__detail::__absu): New function template that returns an
2508         unsigned type, guaranteeing it can represent the most
2509         negative signed value.
2510         (__detail::__gcd, __detail::__lcm): Require arguments to
2511         be unsigned and therefore already non-negative.
2512         (gcd, lcm): Convert arguments to absolute value as unsigned
2513         type before calling __detail::__gcd or __detail::__lcm.
2514         * include/experimental/numeric (gcd, lcm): Likewise.
2515         * testsuite/26_numerics/gcd/gcd_neg.cc: Adjust expected
2516         errors.
2517         * testsuite/26_numerics/lcm/lcm_neg.cc: Likewise.
2518         * testsuite/26_numerics/gcd/92978.cc: New test.
2519         * testsuite/26_numerics/lcm/92978.cc: New test.
2520         * testsuite/experimental/numeric/92978.cc: New test.
2521
2522 2020-08-27  Jonathan Wakely  <jwakely@redhat.com>
2523
2524         * include/std/chrono (__duration_common_type): Ensure the
2525         reduced ratio is used. Remove unused partial specialization
2526         using __failure_type.
2527         (common_type): Pass reduced ratios to __duration_common_type.
2528         Add partial specializations for simple cases involving a single
2529         duration or time_point type.
2530         (duration::period): Use reduced ratio.
2531         (duration::operator+(), duration::operator-()): Return duration
2532         type using the reduced ratio.
2533         * testsuite/20_util/duration/requirements/typedefs_neg2.cc:
2534         Adjust expected errors.
2535         * testsuite/20_util/duration/requirements/reduced_period.cc: New test.
2536
2537 2020-08-27  Patrick Palka  <ppalka@redhat.com>
2538
2539         * include/std/chrono (year_month::operator+): Properly handle a
2540         month value of 0 by casting the month value to int before
2541         subtracting 1 from it so that the difference is sign-extended in
2542         the subsequent addition.
2543         * testsuite/std/time/year_month/1.cc: Test adding months to a
2544         year_month whose month component is below or above the
2545         normalized range of [1,12].
2546
2547 2020-08-27  Patrick Palka  <ppalka@redhat.com>
2548
2549         * include/std/chrono
2550         (__detail::__months_years_conversion_disambiguator): Define.
2551         (year_month::operator+=): Templatize the 'months'-based overload
2552         so that the 'years'-based overload is selected in case of
2553         equally-ranked implicit conversion sequences to both 'months'
2554         and 'years' from the supplied argument.
2555         (year_month::operator-=): Likewise.
2556         (year_month::operator+): Likewise.
2557         (year_month::operator-): Likewise.
2558         (year_month_day::operator+=): Likewise.
2559         (year_month_day::operator-=): Likewise.
2560         (year_month_day::operator+): Likewise.
2561         (year_month_day::operator-): Likewise.
2562         (year_month_day_last::operator+=): Likewise.
2563         (year_month_day_last::operator-=): Likewise.
2564         (year_month_day_last::operator+): Likewise
2565         (year_month_day_last::operator-): Likewise.
2566         (year_month_day_weekday::operator+=): Likewise
2567         (year_month_day_weekday::operator-=): Likewise.
2568         (year_month_day_weekday::operator+): Likewise.
2569         (year_month_day_weekday::operator-): Likewise.
2570         (year_month_day_weekday_last::operator+=): Likewise
2571         (year_month_day_weekday_last::operator-=): Likewise.
2572         (year_month_day_weekday_last::operator+): Likewise.
2573         (year_month_day_weekday_last::operator-): Likewise.
2574         (testsuite/std/time/year_month/2.cc): New test.
2575         (testsuite/std/time/year_month_day/2.cc): New test.
2576         (testsuite/std/time/year_month_day_last/2.cc): New test.
2577         (testsuite/std/time/year_month_weekday/2.cc): New test.
2578         (testsuite/std/time/year_month_weekday_last/2.cc): New test.
2579         * testsuite/std/time/year_month/2.cc: New file.
2580         * testsuite/std/time/year_month_day/2.cc: New file.
2581         * testsuite/std/time/year_month_day_last/2.cc: New file.
2582         * testsuite/std/time/year_month_weekday/2.cc: New file.
2583         * testsuite/std/time/year_month_weekday_last/2.cc: New file.
2584
2585 2020-08-27  Patrick Palka  <ppalka@redhat.com>
2586
2587         PR libstdc++/95322
2588         * include/std/ranges (transform_view::sentinel::__distance_from):
2589         Give this a deduced return type.
2590         (transform_view::sentinel::operator-): Adjust the return type so
2591         that it's based on the constness of the iterator rather than
2592         that of the sentinel.
2593         * testsuite/std/ranges/adaptors/95322.cc: Refer to LWG 3488.
2594
2595 2020-08-27  Patrick Palka  <ppalka@redhat.com>
2596
2597         * include/std/ranges (elements_view::begin): Adjust constraints.
2598         (elements_view::end): Likewise.
2599         (elements_view::_Sentinel::operator==): Templatize to take both
2600         _Iterator<true> and _Iterator<false>.
2601         (elements_view::_Sentinel::operator-): Likewise.
2602         * testsuite/std/ranges/adaptors/elements.cc: Add testcase for
2603         the example from P1994R1.
2604         * testsuite/std/ranges/adaptors/lwg3406.cc: New test.
2605
2606 2020-08-27  Patrick Palka  <ppalka@redhat.com>
2607
2608         * include/std/ranges (elements_view::end): Replace these two
2609         overloads with four new overloads.
2610         (elements_view::_Iterator::operator==): Remove.
2611         (elements_view::_Iterator::operator-): Likewise.
2612         (elements_view::_Sentinel): Define.
2613
2614 2020-08-26  Jonathan Wakely  <jwakely@redhat.com>
2615
2616         * include/std/tuple (_Tuple_impl): Whitespaces changes for
2617         consistent indentation. Also use __enable_if_t alias template.
2618
2619 2020-08-26  Jonathan Wakely  <jwakely@redhat.com>
2620
2621         PR libstdc++/96803
2622         * include/std/tuple
2623         (_Tuple_impl(allocator_arg_t, Alloc, const _Tuple_impl<U...>&)):
2624         Replace parameter pack with a type parameter and a pack and pass
2625         the first type to __use_alloc.
2626         * testsuite/20_util/tuple/cons/96803.cc: New test.
2627
2628 2020-08-26  Patrick Palka  <ppalka@redhat.com>
2629
2630         * include/std/chrono (year_month_weekday::operator==): Compare
2631         weekday_indexed instead of weekday.
2632         * testsuite/std/time/year_month_weekday/1.cc: Augment testcase.
2633
2634 2020-08-26  Jonathan Wakely  <jwakely@redhat.com>
2635
2636         * include/bits/hashtable_policy.h (_Hash_code_base): Change
2637         index of _Hashtable_ebo_helper base class.
2638         * testsuite/23_containers/unordered_map/dup_types.cc: New test.
2639
2640 2020-08-26  Jonathan Wakely  <jwakely@redhat.com>
2641
2642         PR libstdc++/71960
2643         * include/experimental/string_view (basic_string_view):
2644         Enable debug assertions.
2645         * include/std/string_view (basic_string_view):
2646         Likewise.
2647
2648 2020-08-26  François Dumont  <fdumont@gcc.gnu.org>
2649
2650         * include/bits/hashtable_policy.h (_Hashtable<>): Rename _H1 into _Hash
2651         _H2 into _RangeHash and _Hash into _Unused.
2652         (_Hastable_base<>): Likewise.
2653         (_Map_base<>): Likewise.
2654         (_Insert_base<>): Likewise.
2655         (_Insert<>): Likewise.
2656         (_Rehash_base<>): Likewise.
2657         (_Local_iterator_base<>): Likewise.
2658         (_Hash_code_base<>): Likewise.
2659         (_Hash_code_base<_Key, _Value, _ExtractKey, _H1, _H2, _Hash, false>):
2660         Remove.
2661         (_Hash_code_base<_Key, _Value, _ExtractKey, _H1, _H2, _Hash, true>):
2662         Remove.
2663         (_Hash_code_base<_Key, _Value, _ExtractKey, _Hash, _RangeHas, _Unused,
2664         bool>): Remove _Hashtable_ebo_helper<2, _RangeHash> base type..
2665         (_Hash_code_base<>::_M_bucket_index(const _Key&, __hash_code, size_t)):
2666         Replace by...
2667         (_Hash_code_base<>::_M_bucket_index(__hash_code, size_t)): ...this.
2668         (_Local_iterator<>): Remove _H1 and _H2 template parameters.
2669         (_Local_const_iterator<>): Likewise.
2670         (_Equality<>): Likewise.
2671         (_Map_base<>::operator[](const key_type&): Adapt.
2672         (_Map_base<>::operator[](key_type&&): Adapt.
2673         (_Identity::operator()): Add noexcept.
2674         (_Select1st::operator()): Likewise.
2675         (_Hash_code_base<>): Remove _Hashtable_ebo_helper<0, _ExtractKey> base
2676         type.
2677         (_Hash_code_base::_M_extract): Remove.
2678         * include/bits/hashtable.h (_Hashtable<>): Remove _H1 and _H2 template
2679         parameters. Remove _ExtractKey from constructors.
2680         (_Hashtable<>::_M_insert_unique_node(const key_type&, size_t,
2681         __hash_code, __node_type*, size_t)): Replace by...
2682         (_Hashtable<>::_M_insert_unique_node(size_t, __hash_code,
2683          __node_type*, size_t)): ...this.
2684         (_Hashtable<>::_M_insert_muti_node(__node_type*, const key_type&,
2685         __hash_code, __node_type*)): Replace by...
2686         (_Hashtable<>::_M_insert_multi_node(__node_type*, __hash_code,
2687         __node_type*)): ...this.
2688         (_Hashtable<>::__key_extract): Remove.
2689         * include/bits/node_handle.h: Adapt.
2690
2691 2020-08-25  Jonathan Wakely  <jwakely@redhat.com>
2692
2693         * testsuite/21_strings/debug/iterator_self_move_assign_neg.cc: Removed.
2694         * testsuite/21_strings/debug/self_move_assign_neg.cc: Removed.
2695         * testsuite/23_containers/deque/debug/iterator_self_move_assign_neg.cc: Removed.
2696         * testsuite/23_containers/deque/debug/self_move_assign_neg.cc: Removed.
2697         * testsuite/23_containers/forward_list/debug/iterator_self_move_assign_neg.cc: Removed.
2698         * testsuite/23_containers/forward_list/debug/self_move_assign_neg.cc: Removed.
2699         * testsuite/23_containers/list/debug/iterator_self_move_assign_neg.cc: Removed.
2700         * testsuite/23_containers/list/debug/self_move_assign_neg.cc: Removed.
2701         * testsuite/23_containers/map/debug/iterator_self_move_assign_neg.cc: Removed.
2702         * testsuite/23_containers/map/debug/self_move_assign_neg.cc: Removed.
2703         * testsuite/23_containers/multimap/debug/iterator_self_move_assign_neg.cc: Removed.
2704         * testsuite/23_containers/multimap/debug/self_move_assign_neg.cc: Removed.
2705         * testsuite/23_containers/multiset/debug/iterator_self_move_assign_neg.cc: Removed.
2706         * testsuite/23_containers/multiset/debug/self_move_assign_neg.cc: Removed.
2707         * testsuite/23_containers/set/debug/iterator_self_move_assign_neg.cc: Removed.
2708         * testsuite/23_containers/set/debug/self_move_assign_neg.cc: Removed.
2709         * testsuite/23_containers/unordered_map/debug/iterator_self_move_assign_neg.cc: Removed.
2710         * testsuite/23_containers/unordered_map/debug/self_move_assign_neg.cc: Removed.
2711         * testsuite/23_containers/unordered_multimap/debug/iterator_self_move_assign_neg.cc:
2712         Removed.
2713         * testsuite/23_containers/unordered_multimap/debug/self_move_assign_neg.cc: Removed.
2714         * testsuite/23_containers/unordered_multiset/debug/iterator_self_move_assign_neg.cc:
2715         Removed.
2716         * testsuite/23_containers/unordered_multiset/debug/self_move_assign_neg.cc: Removed.
2717         * testsuite/23_containers/unordered_set/debug/iterator_self_move_assign_neg.cc: Removed.
2718         * testsuite/23_containers/unordered_set/debug/self_move_assign_neg.cc: Removed.
2719         * testsuite/23_containers/vector/debug/iterator_self_move_assign_neg.cc: Removed.
2720         * testsuite/23_containers/vector/debug/self_move_assign_neg.cc: Removed.
2721
2722 2020-08-25  Patrick Palka  <ppalka@redhat.com>
2723
2724         * include/std/chrono (year_month_weekday::ok): Fix assert.
2725
2726 2020-08-25  Jonathan Wakely  <jwakely@redhat.com>
2727
2728         * include/std/future (future, shared_future. promise): Add
2729         is_destructible assertion (LWG 3466). Adjust string-literal for
2730         !is_array and !is_function assertions.
2731         * testsuite/30_threads/future/requirements/lwg3458.cc: Check
2732         types with no accessible destructor. Adjust expected errors.
2733         * testsuite/30_threads/promise/requirements/lwg3466.cc:
2734         Likewise.
2735         * testsuite/30_threads/shared_future/requirements/lwg3458.cc:
2736         Likewise.
2737
2738 2020-08-25  Patrick Palka  <ppalka@redhat.com>
2739             Ed Smith-Rowland  <3dw4rd@verizon.net>
2740             Jonathan Wakely  <jwakely@redhat.com>
2741
2742         * include/std/chrono (time_point::operator++)
2743         (time_point::operator--): Define.
2744         (utc_clock, tai_clock, gps_clock): Forward declare.
2745         (utc_time, utc_seconds, tai_time, tai_seconds, gps_time)
2746         (gps_seconds): Define.
2747         (is_clock<utc_clock>, is_clock<tai_clock>, is_clock<gps_clock>)
2748         (is_clock_v<utc_clock>, is_clock_v<tai_clock>)
2749         (is_clock_v<gps_clock>): Define these specializations.
2750         (leap_second_info): Define.
2751         (day, month, year, weekday, weekday_indexed)
2752         (weekday_last, month_day, month_day_last, month_weekday)
2753         (month_weekday_last, year_month, year_month_day)
2754         (year_month_day_last, year_month_weekday, year_month_weekday_last):
2755         Declare and later define.
2756         (last_spec, last, __detail::__days_per_month)
2757         (__detail::__days_per_month, __detail::__last_day): Define.
2758         (January, February, March, April, May, June, July, August)
2759         (September, October, November, December, Sunday, Monday, Tuesday)
2760         (Wednesday, Thursday, Friday, Saturday): Define.
2761         (weekday::operator[]): Define out-of-line.
2762         (year_month_day::_S_from_days, year_month_day::M_days_since_epoch):
2763         Likewise.
2764         (year_month_day::year_month_day, year_month_day::ok): Likewise.
2765         (__detail::__pow10, hh_mm_ss): Define.
2766         (literals::chrono_literals::operator""d)
2767         (literals::chrono_literals::operator""y): Define.
2768         (is_am, is_pm, make12, make24): Define.
2769         * testsuite/20_util/time_point/4.cc: New test.
2770         * testsuite/std/time/day/1.cc: New test.
2771         * testsuite/std/time/hh_mm_ss/1.cc: New test.
2772         * testsuite/std/time/is_am/1.cc: New test.
2773         * testsuite/std/time/is_pm/1.cc: New test.
2774         * testsuite/std/time/make12/1.cc: New test.
2775         * testsuite/std/time/make24/1.cc: New test.
2776         * testsuite/std/time/month/1.cc: New test.
2777         * testsuite/std/time/month_day/1.cc: New test.
2778         * testsuite/std/time/month_day_last/1.cc: New test.
2779         * testsuite/std/time/month_weekday/1.cc: New test.
2780         * testsuite/std/time/month_weekday_last/1.cc: New test.
2781         * testsuite/std/time/weekday/1.cc: New test.
2782         * testsuite/std/time/weekday_indexed/1.cc: New test.
2783         * testsuite/std/time/weekday_last/1.cc: New test.
2784         * testsuite/std/time/year/1.cc: New test.
2785         * testsuite/std/time/year_month/1.cc: New test.
2786         * testsuite/std/time/year_month_day/1.cc: New test.
2787         * testsuite/std/time/year_month_day_last/1.cc: New test.
2788         * testsuite/std/time/year_month_weekday/1.cc: New test.
2789         * testsuite/std/time/year_month_weekday_last/1.cc: New test.
2790
2791 2020-08-24  Jonathan Wakely  <jwakely@redhat.com>
2792
2793         * include/std/ranges (join_view): Add deduction guide (LWG 3474).
2794         * testsuite/std/ranges/adaptors/join_lwg3474.cc: New test.
2795
2796 2020-08-24  Jonathan Wakely  <jwakely@redhat.com>
2797
2798         * include/bits/iterator_concepts.h (indirectly_readable): Add
2799         partial specializations to resolve ambiguities (LWG 3446).
2800         * testsuite/24_iterators/associated_types/readable.traits.cc:
2801         Check types with both value_type and element_type.
2802
2803 2020-08-24  Jonathan Wakely  <jwakely@redhat.com>
2804
2805         * include/std/ranges (ranges::iota_view::size()): Perform all
2806         calculations in the right unsigned types.
2807         * testsuite/std/ranges/iota/size.cc: New test.
2808
2809 2020-08-24  Jonathan Wakely  <jwakely@redhat.com>
2810
2811         PR libstdc++/96766
2812         * include/std/variant (_Variant_storage): Replace implicit
2813         conversions from size_t to __index_type with explicit casts.
2814
2815 2020-08-24  Jonathan Wakely  <jwakely@redhat.com>
2816
2817         * testsuite/30_threads/packaged_task/cons/alloc.cc: Run for
2818         C++11 and skip for C++17 or later.
2819
2820 2020-08-24  Corentin Gay  <gay@adacore.com>
2821
2822         * testsuite/20_util/shared_ptr/atomic/3.cc: Do not require POSIX
2823         threads and add -pthread only on targets supporting them.
2824         * testsuite/20_util/shared_ptr/thread/default_weaktoshared.cc:
2825         Likewise.
2826         * testsuite/20_util/shared_ptr/thread/mutex_weaktoshared.cc:
2827         Likewise.
2828         * testsuite/30_threads/async/42819.cc: Likewise.
2829         * testsuite/30_threads/async/49668.cc: Likewise.
2830         * testsuite/30_threads/async/54297.cc: Likewise.
2831         * testsuite/30_threads/async/any.cc: Likewise.
2832         * testsuite/30_threads/async/async.cc: Likewise.
2833         * testsuite/30_threads/async/except.cc: Likewise.
2834         * testsuite/30_threads/async/launch.cc: Likewise.
2835         * testsuite/30_threads/async/lwg2021.cc: Likewise.
2836         * testsuite/30_threads/async/sync.cc: Likewise. : Likewise.
2837         * testsuite/30_threads/call_once/39909.cc: Likewise.
2838         * testsuite/30_threads/call_once/49668.cc: Likewise.
2839         * testsuite/30_threads/call_once/60497.cc: Likewise.
2840         * testsuite/30_threads/call_once/call_once1.cc: Likewise.
2841         * testsuite/30_threads/call_once/dr2442.cc: Likewise.
2842         * testsuite/30_threads/condition_variable/54185.cc: Likewise.
2843         * testsuite/30_threads/condition_variable/cons/1.cc: Likewise.
2844         * testsuite/30_threads/condition_variable/members/1.cc: Likewise.
2845         * testsuite/30_threads/condition_variable/members/2.cc: Likewise.
2846         * testsuite/30_threads/condition_variable/members/3.cc: Likewise.
2847         * testsuite/30_threads/condition_variable/members/53841.cc: Likewise.
2848         * testsuite/30_threads/condition_variable/members/68519.cc: Likewise.
2849         * testsuite/30_threads/condition_variable/native_handle/typesizes.cc:
2850         Likewise.
2851         * testsuite/30_threads/condition_variable_any/50862.cc: Likewise.
2852         * testsuite/30_threads/condition_variable_any/53830.cc: Likewise.
2853         * testsuite/30_threads/condition_variable_any/cond.cc: Likewise.
2854         * testsuite/30_threads/condition_variable_any/cons/1.cc: Likewise.
2855         * testsuite/30_threads/condition_variable_any/members/1.cc: Likewise.
2856         * testsuite/30_threads/condition_variable_any/members/2.cc: Likewise.
2857         * testsuite/30_threads/future/cons/move.cc: Likewise.
2858         * testsuite/30_threads/future/members/45133.cc: Likewise.
2859         * testsuite/30_threads/future/members/get.cc: Likewise.
2860         * testsuite/30_threads/future/members/get2.cc: Likewise.
2861         * testsuite/30_threads/future/members/share.cc: Likewise.
2862         * testsuite/30_threads/future/members/valid.cc: Likewise.
2863         * testsuite/30_threads/future/members/wait.cc: Likewise.
2864         * testsuite/30_threads/future/members/wait_for.cc: Likewise.
2865         * testsuite/30_threads/future/members/wait_until.cc: Likewise.
2866         * testsuite/30_threads/lock/1.cc: Likewise.
2867         * testsuite/30_threads/lock/2.cc: Likewise.
2868         * testsuite/30_threads/lock/3.cc: Likewise.
2869         * testsuite/30_threads/lock/4.cc: Likewise.
2870         * testsuite/30_threads/mutex/cons/1.cc: Likewise.
2871         * testsuite/30_threads/mutex/dest/destructor_locked.cc: Likewise.
2872         * testsuite/30_threads/mutex/lock/1.cc: Likewise.
2873         * testsuite/30_threads/mutex/native_handle/1.cc: Likewise.
2874         * testsuite/30_threads/mutex/native_handle/typesizes.cc: Likewise.
2875         * testsuite/30_threads/mutex/try_lock/1.cc: Likewise.
2876         * testsuite/30_threads/mutex/try_lock/2.cc: Likewise.
2877         * testsuite/30_threads/mutex/unlock/1.cc: Likewise.
2878         * testsuite/30_threads/mutex/unlock/2.cc: Likewise.
2879         * testsuite/30_threads/packaged_task/49668.cc: Likewise.
2880         * testsuite/30_threads/packaged_task/60564.cc: Likewise.
2881         * testsuite/30_threads/packaged_task/cons/1.cc: Likewise.
2882         * testsuite/30_threads/packaged_task/cons/2.cc: Likewise.
2883         * testsuite/30_threads/packaged_task/cons/3.cc: Likewise.
2884         * testsuite/30_threads/packaged_task/cons/56492.cc: Likewise.
2885         * testsuite/30_threads/packaged_task/cons/alloc.cc: Likewise.
2886         * testsuite/30_threads/packaged_task/cons/move.cc: Likewise.
2887         * testsuite/30_threads/packaged_task/cons/move_assign.cc: Likewise.
2888         * testsuite/30_threads/packaged_task/members/at_thread_exit.cc:
2889         Likewise.
2890         * testsuite/30_threads/packaged_task/members/get_future.cc: Likewise.
2891         * testsuite/30_threads/packaged_task/members/get_future2.cc: Likewise.
2892         * testsuite/30_threads/packaged_task/members/invoke.cc: Likewise.
2893         * testsuite/30_threads/packaged_task/members/invoke2.cc: Likewise.
2894         * testsuite/30_threads/packaged_task/members/invoke3.cc: Likewise.
2895         * testsuite/30_threads/packaged_task/members/invoke4.cc: Likewise.
2896         * testsuite/30_threads/packaged_task/members/invoke5.cc: Likewise.
2897         * testsuite/30_threads/packaged_task/members/reset.cc: Likewise.
2898         * testsuite/30_threads/packaged_task/members/reset2.cc: Likewise.
2899         * testsuite/30_threads/packaged_task/members/swap.cc: Likewise.
2900         * testsuite/30_threads/packaged_task/members/valid.cc: Likewise.
2901         * testsuite/30_threads/promise/60966.cc: Likewise.
2902         * testsuite/30_threads/promise/cons/1.cc: Likewise.
2903         * testsuite/30_threads/promise/cons/alloc.cc: Likewise.
2904         * testsuite/30_threads/promise/cons/move.cc: Likewise.
2905         * testsuite/30_threads/promise/cons/move_assign.cc: Likewise.
2906         * testsuite/30_threads/promise/members/at_thread_exit.cc: Likewise.
2907         * testsuite/30_threads/promise/members/at_thread_exit2.cc: Likewise.
2908         * testsuite/30_threads/promise/members/get_future.cc: Likewise.
2909         * testsuite/30_threads/promise/members/get_future2.cc: Likewise.
2910         * testsuite/30_threads/promise/members/set_exception.cc: Likewise.
2911         * testsuite/30_threads/promise/members/set_exception2.cc: Likewise.
2912         * testsuite/30_threads/promise/members/set_value.cc: Likewise.
2913         * testsuite/30_threads/promise/members/set_value2.cc: Likewise.
2914         * testsuite/30_threads/promise/members/set_value3.cc: Likewise.
2915         * testsuite/30_threads/promise/members/swap.cc: Likewise.
2916         * testsuite/30_threads/recursive_mutex/cons/1.cc: Likewise.
2917         * testsuite/30_threads/recursive_mutex/dest/destructor_locked.cc:
2918         Likewise.
2919         * testsuite/30_threads/recursive_mutex/lock/1.cc: Likewise.
2920         * testsuite/30_threads/recursive_mutex/native_handle/1.cc: Likewise.
2921         * testsuite/30_threads/recursive_mutex/native_handle/typesizes.cc:
2922         Likewise.
2923         * testsuite/30_threads/recursive_mutex/try_lock/1.cc: Likewise.
2924         * testsuite/30_threads/recursive_mutex/try_lock/2.cc: Likewise.
2925         * testsuite/30_threads/recursive_mutex/unlock/1.cc: Likewise.
2926         * testsuite/30_threads/recursive_mutex/unlock/2.cc: Likewise.
2927         * testsuite/30_threads/recursive_timed_mutex/cons/1.cc: Likewise.
2928         * testsuite/30_threads/recursive_timed_mutex/dest/destructor_locked.cc:
2929         Likewise.
2930         * testsuite/30_threads/recursive_timed_mutex/lock/1.cc: Likewise.
2931         * testsuite/30_threads/recursive_timed_mutex/lock/2.cc: Likewise.
2932         * testsuite/30_threads/recursive_timed_mutex/native_handle/1.cc:
2933         Likewise.
2934         * testsuite/30_threads/recursive_timed_mutex/native_handle/typesizes.cc:
2935         Likewise.
2936         * testsuite/30_threads/recursive_timed_mutex/try_lock/1.cc: Likewise.
2937         * testsuite/30_threads/recursive_timed_mutex/try_lock/2.cc: Likewise.
2938         * testsuite/30_threads/recursive_timed_mutex/try_lock_for/1.cc:
2939         Likewise.
2940         * testsuite/30_threads/recursive_timed_mutex/try_lock_for/2.cc:
2941         Likewise.
2942         * testsuite/30_threads/recursive_timed_mutex/try_lock_for/3.cc:
2943         Likewise.
2944         * testsuite/30_threads/recursive_timed_mutex/try_lock_until/1.cc:
2945         Likewise.
2946         * testsuite/30_threads/recursive_timed_mutex/try_lock_until/2.cc:
2947         Likewise.
2948         * testsuite/30_threads/recursive_timed_mutex/unlock/1.cc: Likewise.
2949         * testsuite/30_threads/recursive_timed_mutex/unlock/2.cc: Likewise.
2950         * testsuite/30_threads/shared_future/cons/move.cc: Likewise.
2951         * testsuite/30_threads/shared_future/members/45133.cc: Likewise.
2952         * testsuite/30_threads/shared_future/members/get.cc: Likewise.
2953         * testsuite/30_threads/shared_future/members/get2.cc: Likewise.
2954         * testsuite/30_threads/shared_future/members/valid.cc: Likewise.
2955         * testsuite/30_threads/shared_future/members/wait.cc: Likewise.
2956         * testsuite/30_threads/shared_future/members/wait_for.cc: Likewise.
2957         * testsuite/30_threads/shared_future/members/wait_until.cc: Likewise.
2958         * testsuite/30_threads/shared_lock/cons/1.cc: Likewise.
2959         * testsuite/30_threads/shared_lock/cons/2.cc: Likewise.
2960         * testsuite/30_threads/shared_lock/cons/3.cc: Likewise.
2961         * testsuite/30_threads/shared_lock/cons/4.cc: Likewise.
2962         * testsuite/30_threads/shared_lock/cons/5.cc: Likewise.
2963         * testsuite/30_threads/shared_lock/cons/6.cc: Likewise.
2964         * testsuite/30_threads/shared_lock/locking/1.cc: Likewise.
2965         * testsuite/30_threads/shared_lock/locking/2.cc: Likewise.
2966         * testsuite/30_threads/shared_lock/locking/3.cc: Likewise.
2967         * testsuite/30_threads/shared_lock/locking/4.cc: Likewise.
2968         * testsuite/30_threads/shared_lock/modifiers/1.cc: Likewise.
2969         * testsuite/30_threads/shared_mutex/cons/1.cc: Likewise.
2970         * testsuite/30_threads/shared_mutex/try_lock/1.cc: Likewise.
2971         * testsuite/30_threads/shared_mutex/try_lock/2.cc: Likewise.
2972         * testsuite/30_threads/shared_mutex/unlock/1.cc: Likewise.
2973         * testsuite/30_threads/shared_timed_mutex/cons/1.cc: Likewise.
2974         * testsuite/30_threads/shared_timed_mutex/try_lock/1.cc: Likewise.
2975         * testsuite/30_threads/shared_timed_mutex/try_lock/2.cc: Likewise.
2976         * testsuite/30_threads/shared_timed_mutex/try_lock/3.cc: Likewise.
2977         * testsuite/30_threads/shared_timed_mutex/unlock/1.cc: Likewise.
2978         * testsuite/30_threads/this_thread/1.cc: Likewise.
2979         * testsuite/30_threads/this_thread/sleep_for-mt.cc: Likewise.
2980         * testsuite/30_threads/this_thread/sleep_until-mt.cc: Likewise.
2981         * testsuite/30_threads/thread/cons/1.cc: Likewise.
2982         * testsuite/30_threads/thread/cons/2.cc: Likewise.
2983         * testsuite/30_threads/thread/cons/3.cc: Likewise.
2984         * testsuite/30_threads/thread/cons/4.cc: Likewise.
2985         * testsuite/30_threads/thread/cons/49668.cc: Likewise.
2986         * testsuite/30_threads/thread/cons/5.cc: Likewise.
2987         * testsuite/30_threads/thread/cons/6.cc: Likewise.
2988         * testsuite/30_threads/thread/cons/7.cc: Likewise.
2989         * testsuite/30_threads/thread/cons/8.cc: Likewise.
2990         * testsuite/30_threads/thread/cons/9.cc: Likewise.
2991         * testsuite/30_threads/thread/cons/moveable.cc: Likewise.
2992         * testsuite/30_threads/thread/cons/terminate.cc: Likewise.
2993         * testsuite/30_threads/thread/members/1.cc: Likewise.
2994         * testsuite/30_threads/thread/members/2.cc: Likewise.
2995         * testsuite/30_threads/thread/members/3.cc: Likewise.
2996         * testsuite/30_threads/thread/members/4.cc: Likewise.
2997         * testsuite/30_threads/thread/members/5.cc: Likewise.
2998         * testsuite/30_threads/thread/members/hardware_concurrency.cc:
2999         Likewise.
3000         * testsuite/30_threads/thread/native_handle/typesizes.cc: Likewise.
3001         * testsuite/30_threads/thread/swap/1.cc: Likewise.
3002         * testsuite/30_threads/timed_mutex/cons/1.cc: Likewise.
3003         * testsuite/30_threads/timed_mutex/dest/destructor_locked.cc:
3004         Likewise.
3005         * testsuite/30_threads/timed_mutex/lock/1.cc: Likewise.
3006         * testsuite/30_threads/timed_mutex/native_handle/1.cc: Likewise.
3007         * testsuite/30_threads/timed_mutex/native_handle/typesizes.cc:
3008         Likewise.
3009         * testsuite/30_threads/timed_mutex/try_lock/1.cc: Likewise.
3010         * testsuite/30_threads/timed_mutex/try_lock/2.cc: Likewise.
3011         * testsuite/30_threads/timed_mutex/try_lock_for/1.cc: Likewise.
3012         * testsuite/30_threads/timed_mutex/try_lock_for/2.cc: Likewise.
3013         * testsuite/30_threads/timed_mutex/try_lock_for/3.cc: Likewise.
3014         * testsuite/30_threads/timed_mutex/try_lock_until/1.cc: Likewise.
3015         * testsuite/30_threads/timed_mutex/try_lock_until/2.cc: Likewise.
3016         * testsuite/30_threads/timed_mutex/try_lock_until/57641.cc: Likewise.
3017         * testsuite/30_threads/timed_mutex/unlock/1.cc: Likewise.
3018         * testsuite/30_threads/timed_mutex/unlock/2.cc: Likewise.
3019         * testsuite/30_threads/try_lock/1.cc: Likewise.
3020         * testsuite/30_threads/try_lock/2.cc: Likewise.
3021         * testsuite/30_threads/try_lock/3.cc: Likewise.
3022         * testsuite/30_threads/try_lock/4.cc: Likewise.
3023         * testsuite/30_threads/unique_lock/cons/1.cc: Likewise.
3024         * testsuite/30_threads/unique_lock/cons/2.cc: Likewise.
3025         * testsuite/30_threads/unique_lock/cons/3.cc: Likewise.
3026         * testsuite/30_threads/unique_lock/cons/4.cc: Likewise.
3027         * testsuite/30_threads/unique_lock/cons/5.cc: Likewise.
3028         * testsuite/30_threads/unique_lock/cons/6.cc: Likewise.
3029         * testsuite/30_threads/unique_lock/locking/1.cc: Likewise.
3030         * testsuite/30_threads/unique_lock/locking/2.cc: Likewise.
3031         * testsuite/30_threads/unique_lock/locking/3.cc: Likewise.
3032         * testsuite/30_threads/unique_lock/locking/4.cc: Likewise.
3033         * testsuite/30_threads/unique_lock/modifiers/1.cc: Likewise.
3034
3035 2020-08-21  Jonathan Wakely  <jwakely@redhat.com>
3036
3037         PR libstdc++/96736
3038         * testsuite/17_intro/headers/c++1998/all_attributes.cc: Do not
3039         test "cold" on darwin.
3040         * testsuite/17_intro/headers/c++2011/all_attributes.cc:
3041         Likewise.
3042         * testsuite/17_intro/headers/c++2014/all_attributes.cc:
3043         Likewise.
3044         * testsuite/17_intro/headers/c++2017/all_attributes.cc:
3045         Likewise.
3046         * testsuite/17_intro/headers/c++2020/all_attributes.cc:
3047         Likewise.
3048
3049 2020-08-21  Jonathan Wakely  <jwakely@redhat.com>
3050
3051         PR libstdc++/96718
3052         * testsuite/25_algorithms/pstl/feature_test-2.cc: Require
3053         tbb-backend effective target.
3054         * testsuite/25_algorithms/pstl/feature_test-3.cc: Likewise.
3055         * testsuite/25_algorithms/pstl/feature_test-5.cc: Likewise.
3056         * testsuite/25_algorithms/pstl/feature_test.cc: Likewise.
3057
3058 2020-08-20  Jonathan Wakely  <jwakely@redhat.com>
3059
3060         * include/bits/iterator_concepts.h [__STRICT_ANSI__]
3061         (incrementable_traits<__int128>): Define specialization.
3062         (incrementable_traits<unsigned __int128>): Likewise.
3063         * testsuite/std/ranges/iota/96042.cc: Test iota_view with
3064         __int128.
3065
3066 2020-08-19  Jonathan Wakely  <jwakely@redhat.com>
3067             Patrick Palka  <ppalka@redhat.com>
3068
3069         PR libstdc++/96042
3070         * include/bits/range_access.h (__detail::__to_unsigned_like):
3071         Do not use make_unsigned_t<T> in the return type, as it can
3072         result in an error before the integral<T> constraint is checked.
3073         [__STRICT_ANSI__]: Add overloads for 128-bit integer types.
3074         (__detail::__make_unsigned_like_t): Define as the return type
3075         of __to_unsigned_like.
3076         * testsuite/std/ranges/subrange/96042.cc: New test.
3077
3078 2020-08-19  Jonathan Wakely  <jwakely@redhat.com>
3079
3080         * include/bits/stl_tree.h (operator!=, operator>, operator<=)
3081         (operator>=): Remove deprecated functions.
3082
3083 2020-08-19  Jonathan Wakely  <jwakely@redhat.com>
3084
3085         PR libstdc++/96042
3086         * include/ext/numeric_traits.h (__is_integer_nonstrict): New
3087         trait which is true for 128-bit integers even in strict modes.
3088         (__numeric_traits_integer, __numeric_traits): Use
3089         __is_integer_nonstrict instead of __is_integer.
3090         * include/std/limits [__STRICT_ANSI__ && __SIZEOF_INT128__]
3091         (numeric_limits<__int128>, (numeric_limits<unsigned __int128>):
3092         Define.
3093         * testsuite/std/ranges/iota/96042.cc: New test.
3094
3095 2020-08-19  Jonathan Wakely  <jwakely@redhat.com>
3096
3097         * include/bits/c++config (_GLIBCXX_DEPRECATED_SUGGEST)
3098         (_GLIBCXX11_DEPRECATED, _GLIBCXX11_DEPRECATED_SUGGEST)
3099         (_GLIBCXX17_DEPRECATED_SUGGEST, _GLIBCXX20_DEPRECATED_SUGGEST):
3100         Add new macros to comment.
3101
3102 2020-08-19  Patrick Palka  <ppalka@redhat.com>
3103
3104         * include/Makefile.am (bits_headers): Add new header
3105         <bits/max_size_type.h>.
3106         * include/Makefile.in: Regenerate.
3107         * include/bits/iterator_concepts.h
3108         (ranges::__detail::__max_diff_type): Remove definition, replace
3109         with forward declaration of class __max_diff_type.
3110         (__detail::__max_size_type): Remove definition, replace with
3111         forward declaration of class __max_size_type.
3112         (__detail::__is_unsigned_int128, __is_signed_int128)
3113         (__is_int128): New concepts.
3114         (__detail::__is_integer_like): Accept __int128 and unsigned
3115         __int128.
3116         (__detail::__is_signed_integer_like): Accept __int128.
3117         * include/bits/max_size_type.h: New header.
3118         * include/bits/range_access.h: Include <bits/max_size_type.h>.
3119         (__detail::__to_unsigned_like): Two new overloads.
3120         * testsuite/std/ranges/iota/difference_type.cc: New test.
3121         * testsuite/std/ranges/iota/max_size_type.cc: New test.
3122
3123 2020-08-19  Jonathan Wakely  <jwakely@redhat.com>
3124
3125         * include/bits/c++config (_GLIBCXX_DEPRECATED): Define for all
3126         standard modes.
3127         (_GLIBCXX_DEPRECATED_SUGGEST): New macro for "use 'foo' instead"
3128         message in deprecated warnings.
3129         (_GLIBCXX11_DEPRECATED, _GLIBCXX11_DEPRECATED_SUGGEST): New
3130         macros for marking features deprecated in C++11.
3131         (_GLIBCXX17_DEPRECATED_SUGGEST, _GLIBCXX20_DEPRECATED_SUGGEST):
3132         New macros.
3133         * include/backward/auto_ptr.h (auto_ptr_ref, auto_ptr<void>):
3134         Use _GLIBCXX11_DEPRECATED instead of _GLIBCXX_DEPRECATED.
3135         (auto_ptr): Use _GLIBCXX11_DEPRECATED_SUGGEST.
3136         * include/backward/binders.h (binder1st, binder2nd): Likewise.
3137         * include/bits/ios_base.h (io_state, open_mode, seek_dir)
3138         (streampos, streamoff): Use _GLIBCXX_DEPRECATED_SUGGEST.
3139         * include/std/streambuf (stossc): Replace C++11 attribute
3140         with _GLIBCXX_DEPRECATED_SUGGEST.
3141         * include/std/type_traits (__is_nullptr_t): Use
3142         _GLIBCXX_DEPRECATED_SUGGEST instead of _GLIBCXX_DEPRECATED.
3143         * testsuite/27_io/types/1.cc: Check for deprecated warnings.
3144         Also check for io_state, open_mode and seek_dir typedefs.
3145
3146 2020-08-19  Antony Polukhin  <antoshkka@gmail.com>
3147
3148         PR libstdc++/71579
3149         * include/std/type_traits (invoke_result, is_nothrow_invocable_r)
3150         Add static_asserts to make sure that the argument of the type
3151         trait is not misused with incomplete types.
3152         (is_swappable_with, is_nothrow_swappable_with): Add static_asserts
3153         to make sure that the first and second arguments of the type trait
3154         are not misused with incomplete types.
3155         * testsuite/20_util/invoke_result/incomplete_neg.cc: New test.
3156         * testsuite/20_util/is_nothrow_invocable/incomplete_neg.cc: New test.
3157         * testsuite/20_util/is_nothrow_swappable/incomplete_neg.cc: New test.
3158         * testsuite/20_util/is_nothrow_swappable_with/incomplete_neg.cc: New
3159         test.
3160         * testsuite/20_util/is_swappable_with/incomplete_neg.cc: New test.
3161
3162 2020-08-18  David Edelsohn  <dje.gcc@gmail.com>
3163             Clement Chigot  <clement.chigot@atos.net>
3164
3165         * config/os/aix/t-aix: Add complementary mode object files to
3166         libsupc++.a
3167
3168 2020-08-18  Jonathan Wakely  <jwakely@redhat.com>
3169
3170         * testsuite/17_intro/headers/c++1998/all_attributes.cc: Check
3171         "cold" isn't used in the library. Also check <cxxabi.h>.
3172         * testsuite/17_intro/headers/c++2011/all_attributes.cc:
3173         Likewise.
3174         * testsuite/17_intro/headers/c++2014/all_attributes.cc:
3175         Likewise.
3176         * testsuite/17_intro/headers/c++2017/all_attributes.cc:
3177         Likewise.
3178         * testsuite/17_intro/headers/c++2020/all_attributes.cc:
3179         Likewise.
3180
3181 2020-08-18  Jonathan Wakely  <jwakely@redhat.com>
3182
3183         PR libstdc++/69724
3184         * include/std/future (__future_base::_S_make_deferred_state)
3185         (__future_base::_S_make_async_state): Remove.
3186         (__future_base::_Deferred_state): Change constructor to accept a
3187         parameter pack of arguments and forward them to the call
3188         wrapper.
3189         (__future_base::_Async_state_impl): Likewise. Replace lambda
3190         expression with a named member function.
3191         (async): Construct state object directly from the arguments,
3192         instead of using thread::__make_invoker, _S_make_deferred_state
3193         and _S_make_async_state. Move shared state into the returned
3194         future.
3195         * include/std/thread (thread::_Call_wrapper): New alias
3196         template for use by constructor and std::async.
3197         (thread::thread(Callable&&, Args&&...)): Create state object
3198         directly instead of using _S_make_state.
3199         (thread::__make_invoker, thread::__decayed_tuple)
3200         (thread::_S_make_state): Remove.
3201         * testsuite/30_threads/async/69724.cc: New test.
3202
3203 2020-08-17  Jonathan Wakely  <jwakely@redhat.com>
3204
3205         PR libstdc++/55713
3206         PR libstdc++/71096
3207         PR libstdc++/93147
3208         * include/std/tuple [__has_cpp_attribute(no_unique_address)]
3209         (_Head_base<Idx, Head, true>): New definition of the partial
3210         specialization, using [[no_unique_address]] instead of
3211         inheritance.
3212         * testsuite/libstdc++-prettyprinters/48362.cc: Adjust expected
3213         output.
3214         * testsuite/20_util/tuple/comparison_operators/93147.cc: New test.
3215         * testsuite/20_util/tuple/creation_functions/55713.cc: New test.
3216         * testsuite/20_util/tuple/element_access/71096.cc: New test.
3217
3218 2020-08-14  Lewis Hyatt  <lhyatt@gmail.com>
3219
3220         * testsuite/lib/libstdc++.exp: Use the new option
3221         -fdiagnostics-plain-output.
3222
3223 2020-08-13  Jonathan Wakely  <jwakely@redhat.com>
3224
3225         * acinclude.m4 (GLIBCXX_ENABLE_CHEADERS): Warn if the c_std
3226         option is used and fail unless --enable-cheaders-obsolete is
3227         also used.
3228         * configure: Regenerate.
3229
3230 2020-08-12  Jonathan Wakely  <jwakely@redhat.com>
3231
3232         PR libstdc++/85828
3233         * include/bits/basic_string.h (operator=(basic_string&&)): Check
3234         for self-move before copying with char_traits::copy.
3235         * include/bits/hashtable.h (operator=(_Hashtable&&)): Check for
3236         self-move.
3237         * include/bits/stl_deque.h (_M_move_assign1(deque&&, false_type)):
3238         Check for equal allocators.
3239         * include/bits/stl_list.h (_M_move_assign(list&&, true_type)):
3240         Call clear() instead of _M_clear().
3241         * include/debug/formatter.h (__msg_self_move_assign): Change
3242         comment.
3243         * include/debug/macros.h (__glibcxx_check_self_move_assign):
3244         (_GLIBCXX_DEBUG_VERIFY): Remove.
3245         * include/debug/safe_container.h (operator=(_Safe_container&&)):
3246         Remove assertion check for safe move and make it well-defined.
3247         * include/debug/safe_iterator.h (operator=(_Safe_iterator&&)):
3248         Remove assertion check for self-move.
3249         * include/debug/safe_local_iterator.h
3250         (operator=(_Safe_local_iterator&&)): Likewise.
3251         * testsuite/21_strings/basic_string/cons/char/self_move.cc: New test.
3252         * testsuite/23_containers/deque/cons/self_move.cc: New test.
3253         * testsuite/23_containers/forward_list/cons/self_move.cc: New test.
3254         * testsuite/23_containers/list/cons/self_move.cc: New test.
3255         * testsuite/23_containers/set/cons/self_move.cc: New test.
3256         * testsuite/23_containers/unordered_set/cons/self_move.cc: New test.
3257         * testsuite/23_containers/vector/cons/self_move.cc: New test.
3258
3259 2020-08-11  François Dumont  <fdumont@gcc.gnu.org>
3260
3261         PR libstdc++/91620
3262         * include/bits/forward_list.tcc (forward_list<>::remove): Collect nodes
3263         to destroy in an intermediate forward_list.
3264         (forward_list<>::remove_if, forward_list<>::unique): Likewise.
3265         * include/bits/list.tcc (list<>::remove, list<>::unique): Likewise.
3266         (list<>::remove_if): Likewise.
3267         * include/debug/forward_list (forward_list<>::_M_erase_after): Remove.
3268         (forward_list<>::erase_after): Adapt.
3269         (forward_list<>::remove, forward_list<>::remove_if): Collect nodes to
3270         destroy in an intermediate forward_list.
3271         (forward_list<>::unique): Likewise.
3272         * include/debug/list (list<>::remove, list<>::unique): Likewise.
3273         (list<>::remove_if): Likewise.
3274         * testsuite/23_containers/forward_list/operations/91620.cc: New test.
3275         * testsuite/23_containers/list/operations/91620.cc: New test.
3276
3277 2020-08-11  Jonathan Wakely  <jwakely@redhat.com>
3278
3279         * testsuite/30_threads/thread/cons/84535.cc: Use a custom
3280         namespace.
3281         * testsuite/30_threads/thread/cons/lwg2097.cc: Likewise.
3282
3283 2020-08-11  Jonathan Wakely  <jwakely@redhat.com>
3284
3285         PR libstdc++/89760
3286         * include/experimental/executor [!_GLIBCXX_HAS_GTHREADS]:
3287         (execution_context::mutex_type): Define dummy mutex type.
3288         (system_context): Use execution_context::mutex_type.
3289         (system_context) [!_GLIBCXX_HAS_GTHREADS]: Define dummy
3290         thread and condition variable types.
3291         [!_GLIBCXX_HAS_GTHREADS] (system_context::_M_run()): Do not
3292         define.
3293         (system_context::_M_post) [!_GLIBCXX_HAS_GTHREADS]: Throw
3294         an exception when threads aren't available.
3295         (strand::running_in_this_thread()): Defer to _M_state.
3296         (strand::_State::running_in_this_thread()): New function.
3297         (use_future_t): Do not depend on _GLIBCXX_USE_C99_STDINT_TR1.
3298         * include/experimental/io_context (io_context): Use the
3299         execution_context::mutex_type alias. Replace stack of thread
3300         IDs with counter.
3301         * testsuite/experimental/net/execution_context/use_service.cc:
3302         Enable test for non-pthread targets.
3303
3304 2020-08-11  Jonathan Wakely  <jwakely@redhat.com>
3305
3306         * include/experimental/executor (system_context::a__tag): Make
3307         default constructor explicit.
3308
3309 2020-08-11  Jonathan Wakely  <jwakely@redhat.com>
3310
3311         * include/experimental/executor (system_context::_M_run()):
3312         Fix predicate.
3313         * testsuite/experimental/net/system_context/1.cc: New test.
3314
3315 2020-08-11  Jonathan Wakely  <jwakely@redhat.com>
3316
3317         * include/std/stop_token: Check _GLIBCXX_HAS_GTHREADS using
3318         #ifdef instead of #if.
3319         (stop_token::_S_yield()): Check _GLIBCXX_HAS_GTHREADS before
3320         using __gthread_yield.
3321
3322 2020-08-11  Jonathan Wakely  <jwakely@redhat.com>
3323
3324         * include/std/thread [!_GLIBCXX_HAS_GTHREADS] (this_thread::yield)
3325         (this_thread::sleep_until): Define.
3326         [!_GLIBCXX_HAS_GTHREADS] (this_thread::sleep_for): Define. Replace
3327         use of __gthread_time_t typedef with timespec.
3328         * src/c++11/thread.cc [!_GLIBCXX_HAS_GTHREADS] (__sleep_for):
3329         Likewise.
3330         * testsuite/30_threads/this_thread/2.cc: Moved to...
3331         * testsuite/30_threads/this_thread/yield.cc: ...here.
3332         * testsuite/30_threads/this_thread/3.cc: Moved to...
3333         * testsuite/30_threads/this_thread/sleep_for-mt.cc: ...here.
3334         * testsuite/30_threads/this_thread/4.cc: Moved to...
3335         * testsuite/30_threads/this_thread/sleep_until-mt.cc: ...here.
3336         * testsuite/30_threads/this_thread/58038.cc: Add
3337         dg-require-sleep.
3338         * testsuite/30_threads/this_thread/60421.cc: Likewise.
3339         * testsuite/30_threads/this_thread/sleep_for.cc: New test.
3340         * testsuite/30_threads/this_thread/sleep_until.cc: New test.
3341
3342 2020-08-10  Jonathan Wakely  <jwakely@redhat.com>
3343
3344         PR libstdc++/94681
3345         * src/c++17/fs_ops.cc (read_symlink): Use posix::lstat instead
3346         of calling ::lstat directly.
3347         * src/filesystem/ops.cc (read_symlink): Likewise.
3348
3349 2020-08-10  Jonathan Wakely  <jwakely@redhat.com>
3350
3351         * python/libstdcxx/v6/printers.py (UniquePointerPrinter.__init__):
3352         Use gdb.Type.strip_typedefs().
3353         * testsuite/libstdc++-prettyprinters/compat.cc: Use a typedef in
3354         the emulated old type.
3355
3356 2020-08-10  Jonathan Wakely  <jwakely@redhat.com>
3357
3358         PR libstdc++/94681
3359         * acinclude.m4 (GLIBCXX_CHECK_FILESYSTEM_DEPS): Do not depend on
3360         $enable_libstdcxx_filesystem_ts.
3361         * configure: Regenerate.
3362
3363 2020-08-10  Jonathan Wakely  <jwakely@redhat.com>
3364
3365         PR libstdc++/93904
3366         * include/bits/stl_iterator.h (inserter): Do not deduce
3367         iterator type (LWG 561).
3368         * testsuite/24_iterators/insert_iterator/dr561.cc: New test.
3369
3370 2020-08-10  Jonathan Wakely  <jwakely@redhat.com>
3371
3372         * include/bits/basic_string.tcc [_GLIBCXX_USE_CXX11_ABI=0]
3373         (basic_string::reserve()): Do nothing if exceptions are not
3374         enabled.
3375
3376 2020-08-10  Jonathan Wakely  <jwakely@redhat.com>
3377
3378         PR libstdc++/95749
3379         * src/filesystem/ops-common.h [_GLIBCXX_FILESYSTEM_IS_WINDOWS]
3380         (stat_type): Change to __stat64.
3381         (stat): Use _wstat64.
3382
3383 2020-08-07  Jonathan Wakely  <jwakely@redhat.com>
3384
3385         PR libstdc++/96303
3386         * include/debug/bitset (bitset::operator==): Call _M_base() on
3387         right operand.
3388         (bitset::operator!=): Likewise, but don't define it at all when
3389         default comparisons are supported by the compiler.
3390         * testsuite/23_containers/bitset/operations/96303.cc: New test.
3391
3392 2020-08-07  Jonathan Wakely  <jwakely@redhat.com>
3393
3394         * testsuite/18_support/comparisons/algorithms/partial_order.cc:
3395         Replace VERIFY with static_assert where the compiler now
3396         allows it.
3397         * testsuite/18_support/comparisons/algorithms/weak_order.cc:
3398         Likewise.
3399
3400 2020-08-07  Jonathan Wakely  <jwakely@redhat.com>
3401
3402         * config/abi/pre/gnu.ver: Fix wildcards for wstring symbols.
3403
3404 2020-08-06  Andrew Luo  <andrewluotechnologies@outlook.com>
3405             Jonathan Wakely  <jwakely@redhat.com>
3406
3407         * config/abi/pre/gnu.ver (GLIBCXX_3.4): Use less greedy
3408         patterns for basic_string members.
3409         (GLIBCXX_3.4.29): Export new basic_string::reserve symbols.
3410         * doc/xml/manual/status_cxx2020.xml: Update P0966 status.
3411         * include/bits/basic_string.h (shrink_to_fit()): Call reserve().
3412         (reserve(size_type)): Remove default argument.
3413         (reserve()): Declare new overload.
3414         [!_GLIBCXX_USE_CXX11_ABI] (shrink_to_fit, reserve): Likewise.
3415         * include/bits/basic_string.tcc (reserve(size_type)): Remove
3416         support for shrinking capacity.
3417         (reserve()): Perform shrink-to-fit operation.
3418         [!_GLIBCXX_USE_CXX11_ABI] (reserve): Likewise.
3419         * testsuite/21_strings/basic_string/capacity/1.cc: Adjust to
3420         reflect new behavior.
3421         * testsuite/21_strings/basic_string/capacity/char/1.cc:
3422         Likewise.
3423         * testsuite/21_strings/basic_string/capacity/char/18654.cc:
3424         Likewise.
3425         * testsuite/21_strings/basic_string/capacity/char/2.cc:
3426         Likewise.
3427         * testsuite/21_strings/basic_string/capacity/wchar_t/1.cc:
3428         Likewise.
3429         * testsuite/21_strings/basic_string/capacity/wchar_t/18654.cc:
3430         Likewise.
3431         * testsuite/21_strings/basic_string/capacity/wchar_t/2.cc:
3432         Likewise.
3433
3434 2020-08-06  Jonathan Wakely  <jwakely@redhat.com>
3435
3436         * include/bits/basic_string.tcc
3437         (operator>>(basic_istream&, basic_string&)): Do not set eofbit
3438         if extraction stopped after in.width() characters.
3439         * src/c++98/istream-string.cc (operator>>(istream&, string&)):
3440         Likewise.
3441         * include/bits/istream.tcc (__istream_extract): Do not set
3442         eofbit if extraction stopped after n-1 characters.
3443         * src/c++98/istream.cc (__istream_extract): Likewise.
3444         * testsuite/21_strings/basic_string/inserters_extractors/char/13.cc: New test.
3445         * testsuite/21_strings/basic_string/inserters_extractors/wchar_t/13.cc: New test.
3446         * testsuite/27_io/basic_istream/extractors_character/char/5.cc: New test.
3447         * testsuite/27_io/basic_istream/extractors_character/wchar_t/5.cc: New test.
3448
3449 2020-08-06  Jonathan Wakely  <jwakely@redhat.com>
3450
3451         PR libstdc++/96484
3452         * src/c++17/fs_ops.cc (fs::read_symlink): Return an error
3453         immediately for non-symlinks.
3454         * src/filesystem/ops.cc (fs::read_symlink): Likewise.
3455
3456 2020-08-06  Jonathan Wakely  <jwakely@redhat.com>
3457
3458         * include/std/istream (operator>>(istream&, char*)): Add
3459         attributes to get warnings for pointers that are null or known
3460         to point to the end of a buffer. Request upper bound from
3461         __builtin_object_size check and handle zero-sized buffer case.
3462         (operator>>(istream&, signed char))
3463         (operator>>(istream&, unsigned char*)): Add attributes.
3464         * testsuite/27_io/basic_istream/extractors_character/char/overflow.cc:
3465         Check extracting into the middle of a buffer.
3466         * testsuite/27_io/basic_istream/extractors_character/wchar_t/overflow.cc: New test.
3467
3468 2020-08-05  Jonathan Wakely  <jwakely@redhat.com>
3469
3470         * include/std/atomic (atomic<T>::store): Reformat.
3471
3472 2020-08-05  Jonathan Wakely  <jwakely@redhat.com>
3473
3474         * doc/xml/manual/status_cxx2017.xml: Replace oneAPI DPC++ link
3475         with LLVM repo for PSTL.
3476         * doc/html/manual/status.html: Regenerate.
3477
3478 2020-08-05  Jonathan Wakely  <jwakely@redhat.com>
3479
3480         * config/abi/pre/gnu.ver (GLIBCXX_3.4.29): Export new symbols.
3481         * include/bits/istream.tcc (__istream_extract): New function
3482         template implementing both of operator>>(istream&, char*) and
3483         operator>>(istream&, char(&)[N]). Add explicit instantiation
3484         declaration for it. Remove explicit instantiation declarations
3485         for old function templates.
3486         * include/std/istream (__istream_extract): Declare.
3487         (operator>>(basic_istream<C,T>&, C*)): Define inline and simply
3488         call __istream_extract.
3489         (operator>>(basic_istream<char,T>&, signed char*)): Likewise.
3490         (operator>>(basic_istream<char,T>&, unsigned char*)): Likewise.
3491         (operator>>(basic_istream<C,T>&, C(7)[N])): Define for LWG 2499.
3492         (operator>>(basic_istream<char,T>&, signed char(&)[N])):
3493         Likewise.
3494         (operator>>(basic_istream<char,T>&, unsigned char(&)[N])):
3495         Likewise.
3496         * include/std/streambuf (basic_streambuf): Declare char overload
3497         of __istream_extract as a friend.
3498         * src/c++11/istream-inst.cc: Add explicit instantiation
3499         definition for wchar_t overload of __istream_extract. Remove
3500         explicit instantiation definitions of old operator>> overloads
3501         for versioned-namespace build.
3502         * src/c++98/istream.cc (operator>>(istream&, char*)): Replace
3503         with __istream_extract(istream&, char*, streamsize).
3504         * testsuite/27_io/basic_istream/extractors_character/char/3.cc:
3505         Do not use variable-length array.
3506         * testsuite/27_io/basic_istream/extractors_character/char/4.cc:
3507         Do not run test for C++20.
3508         * testsuite/27_io/basic_istream/extractors_character/char/9555-ic.cc:
3509         Do not test writing to pointers for C++20.
3510         * testsuite/27_io/basic_istream/extractors_character/char/9826.cc:
3511         Use array instead of pointer.
3512         * testsuite/27_io/basic_istream/extractors_character/wchar_t/3.cc:
3513         Do not use variable-length array.
3514         * testsuite/27_io/basic_istream/extractors_character/wchar_t/4.cc:
3515         Do not run test for C++20.
3516         * testsuite/27_io/basic_istream/extractors_character/wchar_t/9555-ic.cc:
3517         Do not test writing to pointers for C++20.
3518         * testsuite/27_io/basic_istream/extractors_character/char/lwg2499.cc:
3519         New test.
3520         * testsuite/27_io/basic_istream/extractors_character/char/lwg2499_neg.cc:
3521         New test.
3522         * testsuite/27_io/basic_istream/extractors_character/char/overflow.cc:
3523         New test.
3524         * testsuite/27_io/basic_istream/extractors_character/wchar_t/lwg2499.cc:
3525         New test.
3526         * testsuite/27_io/basic_istream/extractors_character/wchar_t/lwg2499_neg.cc:
3527         New test.
3528
3529 2020-08-01  Gerald Pfeifer  <gerald@pfeifer.com>
3530
3531         * doc/xml/manual/using_exceptions.xml: Move www.stroustrup.com to
3532         https.
3533         * doc/html/manual/using_exceptions.html: Regenerate.
3534
3535 2020-07-31  Gerald Pfeifer  <gerald@pfeifer.com>
3536
3537         * doc/xml/manual/status_cxx2017.xml: ParallelSTL is now part
3538         of oneAPI DPC++ Library on Github.
3539         * doc/html/manual/status.html: Regenerate.
3540
3541 2020-07-31  François Dumont  <fdumont@gcc.gnu.org>
3542
3543         * include/bits/stl_bvector.h
3544         [_GLIBCXX_INLINE_VERSION](_Bvector_impl_data::_M_start): Define as
3545         _Bit_type*.
3546         (_Bvector_impl_data(const _Bvector_impl_data&)): Default.
3547         (_Bvector_impl_data(_Bvector_impl_data&&)): Delegate to latter.
3548         (_Bvector_impl_data::operator=(const _Bvector_impl_data&)): Default.
3549         (_Bvector_impl_data::_M_move_data(_Bvector_impl_data&&)): Use latter.
3550         (_Bvector_impl_data::_M_reset()): Likewise.
3551         (_Bvector_impl_data::_M_swap_data): New.
3552         (_Bvector_impl::_Bvector_impl(_Bvector_impl&&)): Implement explicitely.
3553         (_Bvector_impl::_Bvector_impl(_Bit_alloc_type&&, _Bvector_impl&&)): New.
3554         (_Bvector_base::_Bvector_base(_Bvector_base&&, const allocator_type&)):
3555         New, use latter.
3556         (vector::vector(vector&&, const allocator_type&, true_type)): New, use
3557         latter.
3558         (vector::vector(vector&&, const allocator_type&, false_type)): New.
3559         (vector::vector(vector&&, const allocator_type&)): Use latters.
3560         (vector::vector(const vector&, const allocator_type&)): Adapt.
3561         [__cplusplus >= 201103](vector::vector(_InputIt, _InputIt,
3562         const allocator_type&)): Use _M_initialize_range.
3563         (vector::operator[](size_type)): Use iterator operator[].
3564         (vector::operator[](size_type) const): Use const_iterator operator[].
3565         (vector::swap(vector&)): Add assertions on allocators. Use _M_swap_data.
3566         [__cplusplus >= 201103](vector::insert(const_iterator, _InputIt,
3567         _InputIt)): Use _M_insert_range.
3568         (vector::_M_initialize(size_type)): Adapt.
3569         [__cplusplus >= 201103](vector::_M_initialize_dispatch): Remove.
3570         [__cplusplus >= 201103](vector::_M_insert_dispatch): Remove.
3571         * python/libstdcxx/v6/printers.py (StdVectorPrinter._iterator): Stop
3572         using start _M_offset.
3573         (StdVectorPrinter.to_string): Likewise.
3574         * testsuite/23_containers/vector/bool/allocator/swap.cc: Adapt.
3575         * testsuite/23_containers/vector/bool/cons/noexcept_move_construct.cc:
3576         Add check.
3577
3578 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
3579
3580         * testsuite/27_io/basic_istream/ignore/char/94749.cc: Use 0
3581         instead of nullptr.
3582         * testsuite/27_io/basic_istream/ignore/wchar_t/94749.cc:
3583         Likewise.
3584
3585 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
3586
3587         * testsuite/20_util/specialized_algorithms/uninitialized_fill_n/sizes.cc:
3588         Move struct to namespace scope.
3589
3590 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
3591
3592         * testsuite/26_numerics/numbers/float128.cc: Check
3593         __STRICT_ANSI__ before using __float128.
3594         * testsuite/std/concepts/concepts.lang/concept.arithmetic/floating_point.cc:
3595         Likewise.
3596
3597 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
3598
3599         * testsuite/18_support/set_terminate.cc: Require C++11 or
3600         higher.
3601         * testsuite/28_regex/simple_c++11.cc: Likewise.
3602         * testsuite/tr1/headers/c++200x/complex.cc: Likewise.
3603         * testsuite/24_iterators/headers/iterator/synopsis.cc:
3604         Require C++14 or lower.
3605
3606 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
3607
3608         * testsuite/23_containers/span/back_assert_neg.cc: Split c++2a
3609         effective-target from xfail selector.
3610         * testsuite/23_containers/span/first_2_assert_neg.cc: Likewise.
3611         * testsuite/23_containers/span/first_assert_neg.cc: Likewise.
3612         * testsuite/23_containers/span/front_assert_neg.cc: Likewise.
3613         * testsuite/23_containers/span/index_op_assert_neg.cc: Likewise.
3614         * testsuite/23_containers/span/last_2_assert_neg.cc: Likewise.
3615         * testsuite/23_containers/span/last_assert_neg.cc: Likewise.
3616         * testsuite/23_containers/span/subspan_2_assert_neg.cc:
3617         Likewise.
3618         * testsuite/23_containers/span/subspan_3_assert_neg.cc:
3619         Likewise.
3620         * testsuite/23_containers/span/subspan_4_assert_neg.cc:
3621         Likewise.
3622         * testsuite/23_containers/span/subspan_5_assert_neg.cc:
3623         Likewise.
3624         * testsuite/23_containers/span/subspan_6_assert_neg.cc:
3625         Likewise.
3626         * testsuite/23_containers/span/subspan_assert_neg.cc: Likewise.
3627
3628 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
3629
3630         * testsuite/20_util/reference_wrapper/83427.cc: Adjust
3631         effective-target to specific language mode only.
3632         * testsuite/24_iterators/headers/iterator/range_access_c++11.cc:
3633         Likewise.
3634         * testsuite/24_iterators/headers/iterator/range_access_c++14.cc:
3635         Likewise.
3636         * testsuite/24_iterators/headers/iterator/synopsis_c++11.cc:
3637         Likewise.
3638         * testsuite/24_iterators/headers/iterator/synopsis_c++14.cc:
3639         Likewise.
3640         * testsuite/26_numerics/valarray/69116.cc:
3641         Likewise.
3642         * testsuite/30_threads/headers/condition_variable/std_c++0x_neg.cc:
3643         Remove whitespace at end of file.
3644         * testsuite/30_threads/headers/future/std_c++0x_neg.cc:
3645         Likewise.
3646
3647 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
3648
3649         * testsuite/17_intro/headers/c++2017/all_attributes.cc: Add
3650         c++17 effective-target.
3651         * testsuite/17_intro/headers/c++2017/all_no_exceptions.cc:
3652         Likewise.
3653         * testsuite/17_intro/headers/c++2017/all_no_rtti.cc: Likewise.
3654         * testsuite/17_intro/headers/c++2017/all_pedantic_errors.cc:
3655         Likewise.
3656         * testsuite/17_intro/headers/c++2017/operator_names.cc:
3657         Likewise.
3658         * testsuite/17_intro/headers/c++2017/stdc++.cc: Likewise.
3659         * testsuite/17_intro/headers/c++2017/stdc++_multiple_inclusion.cc:
3660         Likewise.
3661         * testsuite/18_support/uncaught_exceptions/uncaught_exceptions.cc:
3662         Likewise.
3663         * testsuite/19_diagnostics/error_code/is_error_code_v.cc:
3664         Likewise.
3665         * testsuite/20_util/any/assign/1.cc: Likewise.
3666         * testsuite/20_util/any/assign/2.cc: Likewise.
3667         * testsuite/20_util/any/assign/emplace.cc: Likewise.
3668         * testsuite/20_util/any/assign/exception.cc: Likewise.
3669         * testsuite/20_util/any/assign/self.cc: Likewise.
3670         * testsuite/20_util/any/cons/1.cc: Likewise.
3671         * testsuite/20_util/any/cons/2.cc: Likewise.
3672         * testsuite/20_util/any/cons/aligned.cc: Likewise.
3673         * testsuite/20_util/any/cons/explicit.cc: Likewise.
3674         * testsuite/20_util/any/cons/in_place.cc: Likewise.
3675         * testsuite/20_util/any/cons/nontrivial.cc: Likewise.
3676         * testsuite/20_util/any/make_any.cc: Likewise.
3677         * testsuite/20_util/any/misc/any_cast.cc: Likewise.
3678         * testsuite/20_util/any/misc/any_cast_no_rtti.cc: Likewise.
3679         * testsuite/20_util/any/misc/swap.cc: Likewise.
3680         * testsuite/20_util/any/modifiers/1.cc: Likewise.
3681         * testsuite/20_util/any/observers/type.cc: Likewise.
3682         * testsuite/20_util/any/requirements.cc: Likewise.
3683         * testsuite/20_util/any/typedefs.cc: Likewise.
3684         * testsuite/20_util/as_const/1.cc: Likewise.
3685         * testsuite/20_util/as_const/rvalue_neg.cc: Likewise.
3686         * testsuite/20_util/bind/is_placeholder_v.cc: Likewise.
3687         * testsuite/20_util/bool_constant/requirements.cc: Likewise.
3688         * testsuite/20_util/duration/requirements/treat_as_floating_point_v.cc:
3689         Likewise.
3690         * testsuite/20_util/duration_cast/rounding.cc: Likewise.
3691         * testsuite/20_util/enable_shared_from_this/members/weak_from_this.cc:
3692         Likewise.
3693         * testsuite/20_util/function_objects/invoke/59768.cc: Likewise.
3694         * testsuite/20_util/function_objects/not_fn/1.cc: Likewise.
3695         * testsuite/20_util/function_objects/searchers.cc: Likewise.
3696         * testsuite/20_util/in_place/requirements.cc: Likewise.
3697         * testsuite/20_util/is_invocable/requirements/explicit_instantiation.cc:
3698         Likewise.
3699         * testsuite/20_util/is_invocable/requirements/typedefs.cc:
3700         Likewise.
3701         * testsuite/20_util/is_invocable/value.cc: Likewise.
3702         * testsuite/20_util/is_nothrow_invocable/requirements/explicit_instantiation.cc:
3703         Likewise.
3704         * testsuite/20_util/is_nothrow_invocable/requirements/typedefs.cc:
3705         Likewise.
3706         * testsuite/20_util/is_nothrow_swappable/requirements/explicit_instantiation.cc:
3707         Likewise.
3708         * testsuite/20_util/is_nothrow_swappable/requirements/typedefs.cc:
3709         Likewise.
3710         * testsuite/20_util/is_nothrow_swappable/value.cc: Likewise.
3711         * testsuite/20_util/is_nothrow_swappable_with/requirements/explicit_instantiation.cc:
3712         Likewise.
3713         * testsuite/20_util/is_nothrow_swappable_with/requirements/typedefs.cc:
3714         Likewise.
3715         * testsuite/20_util/is_nothrow_swappable_with/value.cc:
3716         Likewise.
3717         * testsuite/20_util/is_swappable/requirements/explicit_instantiation.cc:
3718         Likewise.
3719         * testsuite/20_util/is_swappable/requirements/typedefs.cc:
3720         Likewise.
3721         * testsuite/20_util/is_swappable/value.cc: Likewise.
3722         * testsuite/20_util/is_swappable_with/requirements/explicit_instantiation.cc:
3723         Likewise.
3724         * testsuite/20_util/is_swappable_with/requirements/typedefs.cc:
3725         Likewise.
3726         * testsuite/20_util/is_swappable_with/value.cc: Likewise.
3727         * testsuite/20_util/logical_traits/requirements/explicit_instantiation.cc:
3728         Likewise.
3729         * testsuite/20_util/logical_traits/requirements/typedefs.cc:
3730         Likewise.
3731         * testsuite/20_util/logical_traits/value.cc: Likewise.
3732         * testsuite/20_util/optional/constexpr/make_optional.cc: Likewise.
3733         * testsuite/20_util/optional/constexpr/observers/2.cc: Likewise.
3734         * testsuite/20_util/optional/constexpr/observers/3.cc: Likewise.
3735         * testsuite/20_util/optional/hash.cc: Likewise.
3736         * testsuite/20_util/pair/swap_cxx17.cc: Likewise.
3737         * testsuite/20_util/ratio/requirements/ratio_equal_v.cc: Likewise.
3738         * testsuite/20_util/shared_ptr/requirements/weak_type.cc:
3739         Likewise.
3740         * testsuite/20_util/specialized_algorithms/memory_management_tools/1.cc:
3741         Likewise.
3742         * testsuite/20_util/tuple/apply/1.cc: Likewise.
3743         * testsuite/20_util/tuple/make_from_tuple/1.cc: Likewise.
3744         * testsuite/20_util/tuple/swap_cxx17.cc: Likewise.
3745         * testsuite/20_util/tuple/tuple_size_v.cc: Likewise.
3746         * testsuite/20_util/unique_ptr/specialized_algorithms/swap_cxx17.cc:
3747         Likewise.
3748         * testsuite/20_util/uses_allocator/requirements/uses_allocator_v.cc:
3749         Likewise.
3750         * testsuite/20_util/variant/any.cc: Likewise.
3751         * testsuite/20_util/variant/compile.cc: Likewise.
3752         * testsuite/20_util/variant/hash.cc: Likewise.
3753         * testsuite/20_util/variant/index_type.cc: Likewise.
3754         * testsuite/20_util/variant/run.cc: Likewise.
3755         * testsuite/20_util/void_t/1.cc: Likewise.
3756         * testsuite/21_strings/basic_string/79162.cc: Likewise.
3757         * testsuite/21_strings/basic_string/cons/char/7.cc: Likewise.
3758         * testsuite/21_strings/basic_string/cons/wchar_t/7.cc: Likewise.
3759         * testsuite/21_strings/basic_string/lwg2758.cc: Likewise.
3760         * testsuite/21_strings/basic_string/lwg2946.cc: Likewise.
3761         * testsuite/21_strings/basic_string/modifiers/append/char/4.cc:
3762         Likewise.
3763         * testsuite/21_strings/basic_string/modifiers/append/wchar_t/4.cc:
3764         Likewise.
3765         * testsuite/21_strings/basic_string/modifiers/assign/char/4.cc:
3766         Likewise.
3767         * testsuite/21_strings/basic_string/modifiers/assign/wchar_t/4.cc:
3768         Likewise.
3769         * testsuite/21_strings/basic_string/modifiers/insert/char/3.cc:
3770         Likewise.
3771         * testsuite/21_strings/basic_string/modifiers/insert/wchar_t/3.cc:
3772         Likewise.
3773         * testsuite/21_strings/basic_string/modifiers/replace/char/7.cc:
3774         Likewise.
3775         * testsuite/21_strings/basic_string/modifiers/replace/wchar_t/7.cc:
3776         Likewise.
3777         * testsuite/21_strings/basic_string/operations/compare/char/2.cc:
3778         Likewise.
3779         * testsuite/21_strings/basic_string/operations/compare/wchar_t/2.cc:
3780         Likewise.
3781         * testsuite/21_strings/basic_string/operations/data/char/2.cc:
3782         Likewise.
3783         * testsuite/21_strings/basic_string/operations/data/wchar_t/2.cc:
3784         Likewise.
3785         * testsuite/21_strings/basic_string/operations/find/char/5.cc:
3786         Likewise.
3787         * testsuite/21_strings/basic_string/operations/find/wchar_t/5.cc:
3788         Likewise.
3789         * testsuite/21_strings/basic_string/operators/char/5.cc: Likewise.
3790         * testsuite/21_strings/basic_string/operators/wchar_t/5.cc:
3791         Likewise.
3792         * testsuite/21_strings/basic_string_view/capacity/1.cc: Likewise.
3793         * testsuite/21_strings/basic_string_view/cons/char/1.cc: Likewise.
3794         * testsuite/21_strings/basic_string_view/cons/char/2.cc: Likewise.
3795         * testsuite/21_strings/basic_string_view/cons/char/3.cc: Likewise.
3796         * testsuite/21_strings/basic_string_view/cons/wchar_t/1.cc:
3797         Likewise.
3798         * testsuite/21_strings/basic_string_view/cons/wchar_t/2.cc:
3799         Likewise.
3800         * testsuite/21_strings/basic_string_view/cons/wchar_t/3.cc:
3801         Likewise.
3802         * testsuite/21_strings/basic_string_view/element_access/char/1.cc:
3803         Likewise.
3804         * testsuite/21_strings/basic_string_view/element_access/char/2.cc:
3805         Likewise.
3806         * testsuite/21_strings/basic_string_view/element_access/char/empty.cc:
3807         Likewise.
3808         * testsuite/21_strings/basic_string_view/element_access/char/front_back.cc:
3809         Likewise.
3810         * testsuite/21_strings/basic_string_view/element_access/wchar_t/1.cc:
3811         Likewise.
3812         * testsuite/21_strings/basic_string_view/element_access/wchar_t/2.cc:
3813         Likewise.
3814         * testsuite/21_strings/basic_string_view/element_access/wchar_t/empty.cc:
3815         Likewise.
3816         * testsuite/21_strings/basic_string_view/element_access/wchar_t/front_back.cc:
3817         Likewise.
3818         * testsuite/21_strings/basic_string_view/include.cc: Likewise.
3819         * testsuite/21_strings/basic_string_view/inserters/char/1.cc:
3820         Likewise.
3821         * testsuite/21_strings/basic_string_view/inserters/char/2.cc:
3822         Likewise.
3823         * testsuite/21_strings/basic_string_view/inserters/char/3.cc:
3824         Likewise.
3825         * testsuite/21_strings/basic_string_view/inserters/pod/10081-out.cc:
3826         Likewise.
3827         * testsuite/21_strings/basic_string_view/inserters/wchar_t/1.cc:
3828         Likewise.
3829         * testsuite/21_strings/basic_string_view/inserters/wchar_t/2.cc:
3830         Likewise.
3831         * testsuite/21_strings/basic_string_view/inserters/wchar_t/3.cc:
3832         Likewise.
3833         * testsuite/21_strings/basic_string_view/literals/types-char8_t.cc:
3834         Likewise.
3835         * testsuite/21_strings/basic_string_view/literals/types.cc:
3836         Likewise.
3837         * testsuite/21_strings/basic_string_view/literals/values-char8_t.cc:
3838         Likewise.
3839         * testsuite/21_strings/basic_string_view/literals/values.cc:
3840         Likewise.
3841         * testsuite/21_strings/basic_string_view/modifiers/remove_prefix/char/1.cc:
3842         Likewise.
3843         * testsuite/21_strings/basic_string_view/modifiers/remove_prefix/wchar_t/1.cc:
3844         Likewise.
3845         * testsuite/21_strings/basic_string_view/modifiers/remove_suffix/char/1.cc:
3846         Likewise.
3847         * testsuite/21_strings/basic_string_view/modifiers/remove_suffix/wchar_t/1.cc:
3848         Likewise.
3849         * testsuite/21_strings/basic_string_view/operations/compare/char/1.cc:
3850         Likewise.
3851         * testsuite/21_strings/basic_string_view/operations/compare/char/13650.cc:
3852         Likewise.
3853         * testsuite/21_strings/basic_string_view/operations/compare/wchar_t/1.cc:
3854         Likewise.
3855         * testsuite/21_strings/basic_string_view/operations/compare/wchar_t/13650.cc:
3856         Likewise.
3857         * testsuite/21_strings/basic_string_view/operations/copy/char/1.cc:
3858         Likewise.
3859         * testsuite/21_strings/basic_string_view/operations/copy/wchar_t/1.cc:
3860         Likewise.
3861         * testsuite/21_strings/basic_string_view/operations/data/char/1.cc:
3862         Likewise.
3863         * testsuite/21_strings/basic_string_view/operations/data/wchar_t/1.cc:
3864         Likewise.
3865         * testsuite/21_strings/basic_string_view/operations/find/char/1.cc:
3866         Likewise.
3867         * testsuite/21_strings/basic_string_view/operations/find/char/2.cc:
3868         Likewise.
3869         * testsuite/21_strings/basic_string_view/operations/find/char/3.cc:
3870         Likewise.
3871         * testsuite/21_strings/basic_string_view/operations/find/char/4.cc:
3872         Likewise.
3873         * testsuite/21_strings/basic_string_view/operations/find/wchar_t/1.cc:
3874         Likewise.
3875         * testsuite/21_strings/basic_string_view/operations/find/wchar_t/2.cc:
3876         Likewise.
3877         * testsuite/21_strings/basic_string_view/operations/find/wchar_t/3.cc:
3878         Likewise.
3879         * testsuite/21_strings/basic_string_view/operations/find/wchar_t/4.cc:
3880         Likewise.
3881         * testsuite/21_strings/basic_string_view/operations/rfind/char/1.cc:
3882         Likewise.
3883         * testsuite/21_strings/basic_string_view/operations/rfind/char/2.cc:
3884         Likewise.
3885         * testsuite/21_strings/basic_string_view/operations/rfind/char/3.cc:
3886         Likewise.
3887         * testsuite/21_strings/basic_string_view/operations/rfind/wchar_t/1.cc:
3888         Likewise.
3889         * testsuite/21_strings/basic_string_view/operations/rfind/wchar_t/2.cc:
3890         Likewise.
3891         * testsuite/21_strings/basic_string_view/operations/rfind/wchar_t/3.cc:
3892         Likewise.
3893         * testsuite/21_strings/basic_string_view/operations/string_conversion/1.cc:
3894         Likewise.
3895         * testsuite/21_strings/basic_string_view/operations/substr/char/1.cc:
3896         Likewise.
3897         * testsuite/21_strings/basic_string_view/operations/substr/wchar_t/1.cc:
3898         Likewise.
3899         * testsuite/21_strings/basic_string_view/range_access/char/1.cc:
3900         Likewise.
3901         * testsuite/21_strings/basic_string_view/range_access/wchar_t/1.cc:
3902         Likewise.
3903         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/1.cc:
3904         Likewise.
3905         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/char/1.cc:
3906         Likewise.
3907         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/char16_t/1.cc:
3908         Likewise.
3909         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/char32_t/1.cc:
3910         Likewise.
3911         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/char8_t/1.cc:
3912         Likewise.
3913         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/wchar_t/1.cc:
3914         Likewise.
3915         * testsuite/21_strings/basic_string_view/requirements/typedefs.cc:
3916         Likewise.
3917         * testsuite/21_strings/basic_string_view/typedefs.cc: Likewise.
3918         * testsuite/21_strings/basic_string_view/types/1.cc: Likewise.
3919         * testsuite/23_containers/array/specialized_algorithms/swap_cxx17.cc:
3920         Likewise.
3921         * testsuite/23_containers/map/modifiers/extract.cc: Likewise.
3922         * testsuite/23_containers/map/modifiers/insert_or_assign/1.cc:
3923         Likewise.
3924         * testsuite/23_containers/map/modifiers/merge.cc: Likewise.
3925         * testsuite/23_containers/map/modifiers/try_emplace/1.cc: Likewise.
3926         * testsuite/23_containers/multimap/modifiers/extract.cc: Likewise.
3927         * testsuite/23_containers/multimap/modifiers/merge.cc: Likewise.
3928         * testsuite/23_containers/multiset/modifiers/extract.cc: Likewise.
3929         * testsuite/23_containers/multiset/modifiers/merge.cc: Likewise.
3930         * testsuite/23_containers/set/modifiers/extract.cc: Likewise.
3931         * testsuite/23_containers/set/modifiers/merge.cc: Likewise.
3932         * testsuite/23_containers/unordered_map/modifiers/extract.cc:
3933         Likewise.
3934         * testsuite/23_containers/unordered_map/modifiers/insert_or_assign.cc:
3935         Likewise.
3936         * testsuite/23_containers/unordered_map/modifiers/merge.cc:
3937         Likewise.
3938         * testsuite/23_containers/unordered_map/modifiers/try_emplace.cc:
3939         Likewise.
3940         * testsuite/23_containers/unordered_multimap/modifiers/extract.cc:
3941         Likewise.
3942         * testsuite/23_containers/unordered_multimap/modifiers/merge.cc:
3943         Likewise.
3944         * testsuite/23_containers/unordered_multiset/modifiers/extract.cc:
3945         Likewise.
3946         * testsuite/23_containers/unordered_multiset/modifiers/merge.cc:
3947         Likewise.
3948         * testsuite/23_containers/unordered_set/modifiers/extract.cc:
3949         Likewise.
3950         * testsuite/23_containers/unordered_set/modifiers/merge.cc:
3951         Likewise.
3952         * testsuite/24_iterators/headers/iterator/range_access_c++17.cc:
3953         Likewise.
3954         * testsuite/24_iterators/headers/iterator/synopsis_c++17.cc:
3955         Likewise.
3956         * testsuite/25_algorithms/clamp/1.cc: Likewise.
3957         * testsuite/25_algorithms/clamp/2.cc: Likewise.
3958         * testsuite/25_algorithms/clamp/constexpr.cc: Likewise.
3959         * testsuite/25_algorithms/clamp/requirements/explicit_instantiation/1.cc:
3960         Likewise.
3961         * testsuite/25_algorithms/clamp/requirements/explicit_instantiation/pod.cc:
3962         Likewise.
3963         * testsuite/26_numerics/headers/cmath/functions_std_c++17.cc:
3964         Likewise.
3965         * testsuite/26_numerics/headers/cmath/special_functions_global.cc:
3966         Likewise.
3967         * testsuite/27_io/basic_ostream/inserters_other/char/lwg2221.cc:
3968         Likewise.
3969         * testsuite/29_atomics/atomic/is_always_lock_free.cc: Likewise.
3970         * testsuite/29_atomics/atomic_integral/is_always_lock_free.cc:
3971         Likewise.
3972         * testsuite/30_threads/shared_lock/70766.cc: Likewise.
3973         * testsuite/30_threads/shared_mutex/cons/1.cc: Likewise.
3974         * testsuite/30_threads/shared_mutex/cons/assign_neg.cc:
3975         Likewise.
3976         * testsuite/30_threads/shared_mutex/cons/copy_neg.cc:
3977         Likewise.
3978         * testsuite/30_threads/shared_mutex/requirements/standard_layout.cc:
3979         Likewise.
3980         * testsuite/30_threads/shared_mutex/try_lock/1.cc: Likewise.
3981         * testsuite/30_threads/shared_mutex/try_lock/2.cc: Likewise.
3982         * testsuite/30_threads/shared_mutex/unlock/1.cc: Likewise.
3983
3984 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
3985
3986         PR libstdc++/96382
3987         * include/bits/stl_iterator.h (reverse_iterator): Friend
3988         declaration should not depend on __cplusplus.
3989
3990 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
3991
3992         * testsuite/experimental/filesystem/filesystem_error/cons.cc:
3993         Remove -std=gnu++17 option.
3994
3995 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
3996
3997         * testsuite/20_util/is_aggregate/value.cc: Adjust for changes to
3998         definition of aggregates in C++20.
3999         * testsuite/20_util/optional/requirements.cc: Adjust for
4000         defaulted comparisons in C++20.
4001
4002 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
4003
4004         * testsuite/20_util/tuple/78939.cc: Suppress warnings about
4005         deprecation of volatile-qualified structured bindings in C++20.
4006         * testsuite/20_util/variable_templates_for_traits.cc: Likewise
4007         for deprecation of is_pod in C++20
4008
4009 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
4010
4011         * testsuite/20_util/time_point_cast/rounding.cc: Remove
4012         duplicate dg-do directive and add c++17 effective target.
4013
4014 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
4015
4016         * src/c++17/floating_from_chars.cc (from_chars_impl): Use
4017         LC_ALL_MASK not LC_ALL.
4018
4019 2020-07-31  Richard Biener  <rguenther@suse.de>
4020
4021         PR debug/96383
4022         * testsuite/20_util/assume_aligned/3.cc: Use -g0.
4023
4024 2020-07-30  Jonathan Wakely  <jwakely@redhat.com>
4025
4026         * include/bits/basic_string.h (size_type, difference_type):
4027         Use allocator_traits to obtain the allocator's size_type and
4028         difference_type.
4029
4030 2020-07-30  Jonathan Wakely  <jwakely@redhat.com>
4031
4032         PR libstdc++/96279
4033         * src/c++17/floating_from_chars.cc (from_chars_impl): Use
4034         isinf unqualified.
4035         [!_GLIBCXX_USE_C99_STDLIB]: Use strtod for float and long
4036         double.
4037
4038 2020-07-30  Jonathan Wakely  <jwakely@redhat.com>
4039
4040         * testsuite/23_containers/unordered_multiset/cons/noexcept_default_construct.cc:
4041         Use allocator with the correct value type.
4042         * testsuite/23_containers/unordered_set/cons/noexcept_default_construct.cc:
4043         Likewise.
4044
4045 2020-07-30  Jonathan Wakely  <jwakely@redhat.com>
4046
4047         * testsuite/20_util/from_chars/4.cc: Pass non-const iterator
4048         to string::insert.
4049
4050 2020-07-30  Jonathan Wakely  <jwakely@redhat.com>
4051
4052         * include/bits/iterator_concepts.h (__detail::__cv_bool): New
4053         helper concept.
4054         (__detail::__integral_nonbool): Likewise.
4055         (__detail::__is_integer_like): Use __integral_nonbool.
4056         * testsuite/std/ranges/access/lwg3467.cc: New test.
4057
4058 2020-07-30  Jonathan Wakely  <jwakely@redhat.com>
4059
4060         * testsuite/20_util/from_chars/4.cc: Use dg-add-options ieee.
4061         * testsuite/29_atomics/atomic_float/1.cc: Likewise.
4062
4063 2020-07-30  Jonathan Wakely  <jwakely@redhat.com>
4064
4065         * testsuite/23_containers/vector/bool/72847.cc: Use the
4066         exceptions_enabled effective-target keyword instead of
4067         checking for an explicit -fno-exceptions option.
4068         * testsuite/util/testsuite_abi.cc (examine_symbol): Remove
4069         redundant try-catch.
4070         * testsuite/util/testsuite_allocator.h [!__cpp_exceptions]:
4071         Do not define check_allocate_max_size and memory_resource.
4072         * testsuite/util/testsuite_containers.h: Replace comment with
4073         #error if wrong standard dialect used.
4074         * testsuite/util/testsuite_shared.cc: Likewise.
4075
4076 2020-07-29  François Dumont  <fdumont@gcc.gnu.org>
4077
4078         * include/bits/hashtable_policy.h (_Node_iterator_base()): New.
4079         (operator==(const _Node_iterator_base&, const _Node_iterator_base&)):
4080         Make hidden friend.
4081         (operator!=(const _Node_iterator_base&, const _Node_iterator_base&)):
4082         Make hidden friend.
4083         (_Local_iterator_base<>): Inherits _Node_iterator_base.
4084         (_Local_iterator_base<>::_M_cur): Remove.
4085         (_Local_iterator_base<>::_M_curr()): Remove.
4086         (operator==(const _Local_iterator_base&, const _Local_iterator_base&)):
4087         Remove.
4088         (operator!=(const _Local_iterator_base&, const _Local_iterator_base&)):
4089         Remove.
4090         * include/debug/unordered_map (unordered_map<>::_M_invalidate): Adapt.
4091         (unordered_multimap<>::_M_invalidate): Adapt.
4092         * include/debug/unordered_set (unordered_set<>::_M_invalidate): Adapt.
4093         (unordered_multiset<>::_M_invalidate): Adapt.
4094
4095 2020-07-29  David Edelsohn  <dje.gcc@gmail.com>
4096             Jonathan Wakely  <jwakely@redhat.com>
4097             Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
4098
4099         * testsuite/lib/dg-options.exp (add_options_for_libatomic): Add
4100         target powerpc-ibm-aix* and powerpc*-*-darwin*.
4101         * testsuite/29_atomics/atomic_float/value_init.cc: Add options
4102         for libatomic.
4103
4104 2020-07-29  François Dumont  <fdumont@gcc.gnu.org>
4105
4106         * include/bits/hashtable.h
4107         (_Hashtable(_Hashtable&& __ht, __node_alloc_type&& __a, true_type)):
4108         Add noexcept qualification.
4109         (_Hashtable(_Hashtable&&)): Fix noexcept qualification.
4110         (_Hashtable(_Hashtable&&, const allocator_type&)): Add noexcept
4111         qualification.
4112         * include/bits/unordered_map.h
4113         (unordered_map(unordered_map&&, const allocator_type&)): Add noexcept
4114         qualification.
4115         (unordered_multimap(unordered_multimap&&, const allocator_type&)):
4116         Likewise.
4117         * include/bits/unordered_set.h
4118         (unordered_set(unordered_set&&, const allocator_type&)): Likewise.
4119         (unordered_multiset(unordered_multiset&&, const allocator_type&)):
4120         Likewise.
4121         * include/debug/unordered_map
4122         (unordered_map(unordered_map&&, const allocator_type&)): Likewise.
4123         (unordered_multimap(unordered_multimap&&, const allocator_type&)):
4124         Likewise.
4125         * include/debug/unordered_set
4126         (unordered_set(unordered_set&&, const allocator_type&)): Likewise.
4127         (unordered_multiset(unordered_multiset&&, const allocator_type&)):
4128         Likewise.
4129         * testsuite/23_containers/unordered_map/allocator/default_init.cc:
4130         New test.
4131         * testsuite/23_containers/unordered_map/cons/noexcept_default_construct.cc:
4132         New test.
4133         * testsuite/23_containers/unordered_map/cons/noexcept_move_construct.cc:
4134         New test.
4135         * testsuite/23_containers/unordered_map/modifiers/move_assign.cc:
4136         New test.
4137         * testsuite/23_containers/unordered_multimap/cons/noexcept_default_construct.cc:
4138         New test.
4139         * testsuite/23_containers/unordered_multimap/cons/noexcept_move_construct.cc:
4140         New test.
4141         * testsuite/23_containers/unordered_multiset/cons/noexcept_default_construct.cc:
4142         New test.
4143         * testsuite/23_containers/unordered_multiset/cons/noexcept_move_construct.cc:
4144         New test.
4145         * testsuite/23_containers/unordered_set/allocator/default_init.cc:
4146         New test.
4147         * testsuite/23_containers/unordered_set/cons/noexcept_default_construct.cc:
4148         New test.
4149         * testsuite/23_containers/unordered_set/cons/noexcept_move_construct.cc:
4150         New test.
4151
4152 2020-07-28  François Dumont  <fdumont@gcc.gnu.org>
4153
4154         * include/bits/hashtable.h
4155         (_Hashtable<>(_InputIterator, _InputIterator, size_t, const _H1&,
4156         const _H2&, const _Hash&, const _Equal&, const _ExtractKey&,
4157         const allocator_type&, true_type)): New.
4158         (_Hashtable<>(_InputIterator, _InputIterator, size_t, const _H1&,
4159         const _H2&, const _Hash&, const _Equal&, const _ExtractKey&,
4160         const allocator_type&, false_type)): New.
4161         (_Hashtable<>(_InputIterator, _InputIterator, size_t, const _H1&,
4162         const _H2&, const _Hash&, const _Equal&, const _ExtractKey&,
4163         const allocator_type&)): Delegate to latters.
4164         (operator=(initializer_list<value_type>)): Rehash if too small.
4165         (_M_insert(_Arg&&, const _NodeGenerator&, true_type)): Remove
4166         size_t len parameter.
4167         * include/bits/hashtable_policy.h (_Insert_base<>::_M_insert_range):
4168         Do not try to get input range distance.
4169         * testsuite/23_containers/unordered_set/cons/bucket_hint.cc: New test.
4170         * testsuite/23_containers/unordered_set/modifiers/insert.cc: New test.
4171
4172 2020-07-27  François Dumont  <fdumont@gcc.gnu.org>
4173
4174         * include/bits/hashtable_policy.h (_Map_base<>::at): Use
4175         _Hashtable<>::find.
4176         (_Hashtable_base<>::_Equal_hash_code<>::_S_node_equals):New.
4177         (_Hashtable_base<>::_M_node_equals): New, use latter.
4178         (_Equality<_Key, _Value, _Alloc, _ExtractKey, _Equal, _H1, _H2, _Hash,
4179         _RehashPolicy, false>::_M_equal): Adapt to use latter.
4180         * include/bits/hashtable.h (_Hashtable<>::_M_update_bbegin): New.
4181         (_Hashtable<>::_M_assign): Use latter.
4182         (_Hashtable<>::_M_move_assign): Likewise.
4183         (_Hashtable<>(_Hashtable<>&&)): Likewise.
4184         (_Hashtable<>(_Hashtable<>&&, const allocator_type&)): Likewise.
4185         (_Hashtable<>::swap): Likewise.
4186         (_Hashtable<>::find): Build iterator directly from _M_find_node result.
4187         (_Hashtable<>::count): Use _Hashtable<>::find.
4188         (_Hashtable<>::equal_range): Likewise.
4189         (_Hashtable<>::_M_erase(false_type, const key_type&)): Use
4190         _M_node_equals.
4191
4192 2020-07-27  Jonathan Wakely  <jwakely@redhat.com>
4193
4194         * src/c++17/floating_from_chars.cc (from_chars_impl): Ensure
4195         that FE_NEAREST is used.
4196         * testsuite/20_util/from_chars/4.cc: Do not use if constexpr in
4197         a { target c++14 } test.
4198         [!_GLIBCXX_HAVE_USELOCALE]: Disable all tests.
4199         * testsuite/20_util/from_chars/5.cc [!_GLIBCXX_HAVE_USELOCALE]:
4200         Likewise.
4201         * testsuite/20_util/from_chars/6.cc: New test.
4202
4203 2020-07-22  Jonathan Wakely  <jwakely@redhat.com>
4204
4205         * include/std/future (future, shared_future, promise): Add
4206         static assertions to the primary template to reject array and
4207         function types.
4208         * testsuite/30_threads/future/requirements/lwg3458.cc: New test.
4209         * testsuite/30_threads/promise/requirements/lwg3466.cc: New test.
4210         * testsuite/30_threads/shared_future/requirements/lwg3458.cc: New test.
4211
4212 2020-07-22  Jonathan Wakely  <jwakely@redhat.com>
4213
4214         * include/bits/stl_iterator.h (reverse_iterator): Constrain
4215         converting constructor and converting assignment operator.
4216         Access source iterator's data member directly instead of
4217         calling base().
4218         (move_iterator): Likewise.
4219         * testsuite/24_iterators/move_iterator/dr3435.cc: New test.
4220         * testsuite/24_iterators/reverse_iterator/dr3435.cc: New test.
4221
4222 2020-07-20  Jonathan Wakely  <jwakely@redhat.com>
4223
4224         * acinclude.m4 (libtool_VERSION): Bump version.
4225         * config.h.in: Regenerate.
4226         * config/abi/pre/gnu.ver: Add GLIBCXX_3.4.29 version and new
4227         exports.
4228         * config/os/gnu-linux/ldbl-extra.ver: Add _GLIBCXX_LDBL_3.4.29
4229         version and new export.
4230         * configure: Regenerate.
4231         * configure.ac: Check for <xlocale.h> and uselocale.
4232         * crossconfig.m4: Add macro or checks for uselocale.
4233         * include/std/charconv (from_chars): Declare overloads for
4234         float, double, and long double.
4235         * src/c++17/Makefile.am: Add new file.
4236         * src/c++17/Makefile.in: Regenerate.
4237         * src/c++17/floating_from_chars.cc: New file.
4238         (from_chars): Define for float, double, and long double.
4239         * testsuite/20_util/from_chars/1_c++20_neg.cc: Prune extra
4240         diagnostics caused by new overloads.
4241         * testsuite/20_util/from_chars/1_neg.cc: Likewise.
4242         * testsuite/20_util/from_chars/2.cc: Check leading '+'.
4243         * testsuite/20_util/from_chars/4.cc: New test.
4244         * testsuite/20_util/from_chars/5.cc: New test.
4245         * testsuite/util/testsuite_abi.cc: Add new symbol versions.
4246
4247 2020-07-20  Jonathan Wakely  <jwakely@redhat.com>
4248
4249         * include/bits/istream.tcc
4250         (basic_istream::get(__streambuf_type&, char_type): Use unsigned
4251         long long for counter and check if it would overflow _M_gcount.
4252         * testsuite/27_io/basic_istream/get/char/lwg3464.cc: New test.
4253         * testsuite/27_io/basic_istream/get/wchar_t/lwg3464.cc: New test.
4254
4255 2020-07-17  Iain Sandoe  <iain@sandoe.co.uk>
4256
4257         * include/std/coroutine: Mark the methods of the
4258         trivial awaitables as constexpr.
4259
4260 2020-07-14  David Edelsohn  <dje.gcc@gmail.com>
4261
4262         * config/os/aix/t-aix: Set BITS from compiler cpp macro.
4263
4264 2020-07-13  Jonathan Wakely  <jwakely@redhat.com>
4265
4266         PR libstdc++/94749
4267         PR libstdc++/96161
4268         * include/bits/istream.tcc (basic_istream::ignore(streamsize))
4269         [n == max]: Check overflow conditions on _M_gcount. Rely on
4270         the fact that either EOF or the delimiter was reached.
4271         [n < max]: Check _M_gcount < n before checking for EOF or
4272         delimiter.
4273         (basic_istream::ignore(streamsize, char_type): Likewise.
4274         * src/c++98/compatibility.cc (istream::ignore(streamsize))
4275         (wistream::ignore(streamsize)): Likewise.
4276         * src/c++98/istream.cc (istream::ignore(streamsize, char_type))
4277         (wistream::ignore(streamsize, char_type)): Likewise.
4278         * testsuite/27_io/basic_istream/ignore/char/94749.cc: Check that
4279         delimiter is discarded if the number of characters ignored
4280         doesn't fit in streamsize.
4281         * testsuite/27_io/basic_istream/ignore/wchar_t/94749.cc:
4282         Likewise.
4283         * testsuite/27_io/basic_istream/ignore/char/96161.cc: New test.
4284         * testsuite/27_io/basic_istream/ignore/wchar_t/96161.cc: New test.
4285
4286 2020-07-08  François Dumont  <fdumont@gcc.gnu.org>
4287
4288         * include/bits/stl_tree.h (_Rb_tree_impl(_Rb_tree_impl&&)): Add noexcept
4289         qualification based only on _Compare one.
4290         * testsuite/23_containers/map/cons/noexcept_move_construct.cc: Add
4291         static asserts.
4292         * testsuite/23_containers/multimap/cons/noexcept_move_construct.cc:
4293         Likewise.
4294         * testsuite/23_containers/multiset/cons/noexcept_move_construct.cc:
4295         Likewise.
4296         * testsuite/23_containers/set/cons/noexcept_move_construct.cc: Likewise.
4297
4298 2020-07-07  Jonathan Wakely  <jwakely@redhat.com>
4299
4300         * include/std/limits: Whitespace changes.
4301
4302 2020-07-07  Jonathan Wakely  <jwakely@redhat.com>
4303
4304         * include/Makefile.am: Remove bits/int_limits.h.
4305         * include/Makefile.in: Regenerate.
4306         * include/bits/int_limits.h: Removed.
4307         * include/bits/parse_numbers.h (_Select_int_base): Replace
4308         __int_limits with __int_traits.
4309         * include/bits/range_access.h (_SSize::operator()): Likewise.
4310         * include/ext/numeric_traits.h (__numeric_traits_integer): Add
4311         static assertion.
4312         (__int_traits): New alias template.
4313         * include/std/bit (__rotl, __rotr, __countl_zero, __countl_one)
4314         (__countr_zero, __countr_one, __popcount, __bit_ceil)
4315         (__bit_floor, __bit_width) Replace __int_limits with
4316         __int_traits.
4317         * include/std/charconv (__to_chars_8, __from_chars_binary)
4318         (__from_chars_alpha_to_num, from_chars): Likewise.
4319         * include/std/memory_resource (polymorphic_allocator::allocate)
4320         (polymorphic_allocator::allocate_object): Likewise.
4321         * include/std/string_view (basic_string_view::_S_compare):
4322         Likewise.
4323         * include/std/utility (cmp_equal, cmp_less, in_range): Likewise.
4324
4325 2020-07-07  Jonathan Wakely  <jwakely@redhat.com>
4326
4327         * include/std/limits: Whitespace changes.
4328
4329 2020-07-06  Jonathan Wakely  <jwakely@redhat.com>
4330
4331         * include/std/optional (_Optional_payload_base, _Optional_base)
4332         (optional, __optional_hash_call_base): Adjust whitespace and
4333         other formatting. Remove redundant && tokens on template
4334         arguments to type traits.
4335
4336 2020-07-06  Jonathan Wakely  <jwakely@redhat.com>
4337
4338         * include/std/optional (make_optional): Add enable_if
4339         constraints and noexcept-specifier to each overload.
4340         * testsuite/20_util/optional/make_optional-2.cc: New test.
4341
4342 2020-07-06  Jonathan Wakely  <jwakely@redhat.com>
4343
4344         PR libstdc++/96036
4345         * include/std/optional (optional): Add noexcept-specifier to
4346         every constructor, assignment operator, emplace function and
4347         dereference operator.
4348         * testsuite/20_util/optional/assignment/noexcept.cc: New test.
4349         * testsuite/20_util/optional/cons/noexcept.cc: New test.
4350
4351 2020-07-06  Jonathan Wakely  <jwakely@redhat.com>
4352
4353         PR libstdc++/96063
4354         * include/bits/fs_dir.h: Use consistent tag in class-head.
4355         * include/bits/localefwd.h: Likewise.
4356         * include/bits/regex.h: Likewise.
4357         * include/bits/stl_map.h: Likewise.
4358         * include/bits/stl_multimap.h: Likewise.
4359         * include/bits/stl_multiset.h: Likewise.
4360         * include/bits/stl_set.h: Likewise.
4361         * include/std/complex: Likewise.
4362         * include/std/functional: Likewise.
4363         * include/std/future: Likewise.
4364         * include/std/system_error: Likewise.
4365         * include/std/thread: Likewise.
4366         * include/std/tuple: Likewise.
4367         * include/std/type_traits: Likewise.
4368         * include/std/valarray: Likewise.
4369
4370 2020-07-02  Jonathan Wakely  <jwakely@redhat.com>
4371
4372         * testsuite/27_io/basic_ios/conv/voidptr.cc: Add c++98_only
4373         target selector.
4374
4375 2020-07-02  Jonathan Wakely  <jwakely@redhat.com>
4376
4377         * testsuite/18_support/headers/cstdalign/std_c++0x_neg.cc: Add
4378         c++98_only target selector.
4379         * testsuite/18_support/headers/cstdbool/std_c++0x_neg.cc:
4380         Likewise.
4381         * testsuite/18_support/headers/cstdint/std_c++0x_neg.cc:
4382         Likewise.
4383         * testsuite/18_support/headers/new/synopsis_cxx98.cc: Likewise.
4384         * testsuite/19_diagnostics/headers/system_error/std_c++0x_neg.cc:
4385         Likewise.
4386         * testsuite/20_util/headers/type_traits/std_c++0x_neg.cc:
4387         Likewise.
4388         * testsuite/23_containers/headers/array/std_c++0x_neg.cc:
4389         Likewise.
4390         * testsuite/23_containers/headers/tuple/std_c++0x_neg.cc:
4391         Likewise.
4392         * testsuite/23_containers/headers/unordered_map/std_c++0x_neg.cc:
4393         Likewise.
4394         * testsuite/23_containers/headers/unordered_set/std_c++0x_neg.cc:
4395         Likewise.
4396         * testsuite/26_numerics/headers/ccomplex/std_c++0x_neg.cc:
4397         Likewise.
4398         * testsuite/26_numerics/headers/cfenv/std_c++0x_neg.cc:
4399         Likewise.
4400         * testsuite/26_numerics/headers/cmath/c99_classification_macros_c++98.cc:
4401         Likewise.
4402         * testsuite/26_numerics/headers/ctgmath/std_c++0x_neg.cc:
4403         Likewise.
4404         * testsuite/26_numerics/headers/random/std_c++0x_neg.cc:
4405         Likewise.
4406         * testsuite/27_io/headers/cinttypes/std_c++0x_neg.cc: Likewise.
4407         * testsuite/28_regex/headers/regex/std_c++0x_neg.cc: Likewise.
4408         * testsuite/29_atomics/headers/atomic/std_c++0x_neg.cc:
4409         Likewise.
4410         * testsuite/30_threads/headers/condition_variable/std_c++0x_neg.cc:
4411         Likewise.
4412         * testsuite/30_threads/headers/future/std_c++0x_neg.cc:
4413         Likewise.
4414         * testsuite/30_threads/headers/mutex/std_c++0x_neg.cc: Likewise.
4415         * testsuite/30_threads/headers/thread/std_c++0x_neg.cc:
4416         Likewise.
4417
4418 2020-07-02  Ville Voutilainen  <ville.voutilainen@gmail.com>
4419
4420         PR libstdc++/91807
4421         * include/std/variant
4422         (_Copy_assign_base::operator=(const _Copy_assign_base&):
4423         Do the move-assignment from a temporary so that the temporary
4424         is constructed with an explicit index.
4425         * testsuite/20_util/variant/91807.cc: New.
4426
4427 2020-07-02  Jonathan Wakely  <jwakely.gcc@gmail.com>
4428
4429         PR libstdc++/91153
4430         PR target/93224
4431         * testsuite/29_atomics/atomic_float/1.cc: Use different values
4432         for tests.
4433         * testsuite/29_atomics/atomic_ref/float.cc: Likewise.
4434
4435 2020-07-01  Jonathan Wakely  <jwakely@redhat.com>
4436
4437         PR libstdc++/94627
4438         * include/bits/regex.h (operator==, operator!=): Remove noexcept
4439         equality comparisons for match_results.
4440         * testsuite/28_regex/match_results/94627.cc: New test.
4441
4442 2020-07-01  Martin Sebor  <msebor@redhat.com>
4443
4444         * testsuite/21_strings/basic_string_view/cons/char/nonnull.cc: Adjust
4445         text of expected warning.
4446         * testsuite/21_strings/basic_string_view/cons/wchar_t/nonnull.cc: Same.
4447         * testsuite/21_strings/basic_string_view/operations/compare/char/nonnull.cc: Same.
4448         * testsuite/21_strings/basic_string_view/operations/find/char/nonnull.cc: Same.
4449         * testsuite/21_strings/basic_string_view/operations/rfind/char/nonnull.cc: Same.
4450
4451 2020-06-29  Ville Voutilainen  <ville.voutilainen@gmail.com>
4452
4453         Revert:
4454         2020-06-28  Ville Voutilainen  <ville.voutilainen@gmail.com>
4455
4456         * include/bits/basic_string.h (string(_CharT*, const _Alloc&)):
4457         Add a __nonnull__ attribute.
4458         * testsuite/21_strings/basic_string/cons/char/nonnull.cc: New.
4459         * testsuite/21_strings/basic_string/cons/wchar_t/nonnull.cc: Likewise.
4460
4461 2020-06-28  Ville Voutilainen  <ville.voutilainen@gmail.com>
4462
4463         * include/bits/basic_string.h (string(_CharT*, const _Alloc&)):
4464         Add a __nonnull__ attribute.
4465         * testsuite/21_strings/basic_string/cons/char/nonnull.cc: New.
4466         * testsuite/21_strings/basic_string/cons/wchar_t/nonnull.cc: Likewise.
4467
4468 2020-06-28  Ville Voutilainen  <ville.voutilainen@gmail.com>
4469
4470         PR libstdc++/95915
4471         * include/std/type_traits (is_literal_type, is_literal_type_v):
4472         Deprecate in C++17.
4473         * include/std/variant (_Uninitialized):
4474         Adjust the condition and the comment.
4475         * testsuite/20_util/is_literal_type/deprecated-1z.cc: New.
4476         * testsuite/20_util/is_literal_type/requirements/explicit_instantiation.cc:
4477         Adjust.
4478         * testsuite/20_util/is_literal_type/requirements/typedefs.cc: Likewise.
4479         * testsuite/20_util/is_literal_type/value.cc: Likewise.
4480         * testsuite/20_util/optional/constexpr/nullopt.cc:
4481         Use __is_literal_type directly.
4482         * testsuite/20_util/optional/nullopt.cc: Likewise.
4483         * testsuite/20_util/variable_templates_for_traits.cc: Adjust.
4484         * testsuite/20_util/variant/95915.cc: New.
4485         * testsuite/20_util/variant/compile.cc: Add new test.
4486         * testsuite/experimental/optional/constexpr/nullopt.cc:
4487         Use __is_literal_type directly.
4488         * testsuite/experimental/optional/nullopt.cc: Likewise.
4489         * testsuite/experimental/type_traits/value.cc: Adjust.
4490         * testsuite/util/testsuite_common_types.h:
4491         Use __is_literal_type directly.
4492
4493 2020-06-24  Jonathan Wakely  <jwakely@redhat.com>
4494
4495         * include/std/charconv (__from_chars_binary): Ignore leading zeros.
4496         * testsuite/20_util/from_chars/1.cc: Check "0x1" for all bases,
4497         not just 10 and 16.
4498         * testsuite/20_util/from_chars/3.cc: New test.
4499
4500 2020-06-24  Jonathan Wakely  <jwakely@redhat.com>
4501
4502         * include/bits/stl_algobase.h (__find_if): Add FALLTHRU markers.
4503         * include/std/charconv (__detail::__to_chars): Avoid
4504         -Wsign-compare warning.
4505
4506 2020-06-24  Jonathan Wakely  <jwakely@redhat.com>
4507
4508         PR libstdc++/95851
4509         * include/std/charconv (__to_chars_i): Check for zero-sized
4510         buffer unconditionally.
4511         * testsuite/20_util/to_chars/95851.cc: New test.
4512
4513 2020-06-23  Jonathan Wakely  <jwakely@redhat.com>
4514
4515         * testsuite/20_util/from_chars/1_c++20_neg.cc: Check enumeration
4516         type.
4517         * testsuite/20_util/from_chars/1_neg.cc: Likewise. Move dg-error
4518         directives outside preprocessor condition.
4519
4520 2020-06-23  Jonathan Wakely  <jwakely@redhat.com>
4521
4522         PR libstdc++/95832
4523         * include/std/variant (__detail::__variant::_Build_FUN): Remove
4524         partial specialization to prevent narrowing conversions to bool.
4525         * testsuite/20_util/variant/compile.cc: Test non-narrowing
4526         conversions to bool.
4527         * testsuite/20_util/variant/run.cc: Likewise.
4528
4529 2020-06-23  Jonathan Wakely  <jwakely@redhat.com>
4530
4531         * doc/Makefile.in: Regenerate.
4532         * include/Makefile.in: Regenerate.
4533         * libsupc++/Makefile.in: Regenerate.
4534         * po/Makefile.in: Regenerate.
4535         * python/Makefile.in: Regenerate.
4536         * src/Makefile.in: Regenerate.
4537         * src/c++11/Makefile.in: Regenerate.
4538         * src/c++17/Makefile.in: Regenerate.
4539         * src/c++98/Makefile.in: Regenerate.
4540         * src/filesystem/Makefile.in: Regenerate.
4541         * testsuite/Makefile.in: Regenerate.
4542
4543 2020-06-22  David Edelsohn  <dje.gcc@gmail.com>
4544
4545         * Makefile.am: Use -include.
4546         * Makefile.in: Regenerate.
4547
4548 2020-06-21  David Edelsohn  <dje.gcc@gmail.com>
4549
4550         * Makefile.am (tmake_file): Build and install AIX-style FAT libraries.
4551         * Makefile.in: Regenerate.
4552         * configure.ac (tmake_file): Substitute.
4553         * configure: Regenerate.
4554         * configure.host (aix*): Define tmake_file.
4555         * config/os/aix/t-aix: New file.
4556
4557 2020-06-20  Jason Merrill  <jason@redhat.com>
4558
4559         * testsuite/24_iterators/move_iterator/rel_ops_c++20.cc:
4560         Remove greedy_ops tests.
4561         * testsuite/24_iterators/reverse_iterator/rel_ops_c++20.cc:
4562         Remove greedy_ops tests.
4563
4564 2020-06-19  Jonathan Wakely  <jwakely@redhat.com>
4565
4566         PR libstdc++/95765
4567         * include/bits/stl_algobase.h (__size_to_integer(float))
4568         (__size_to_integer(double), __size_to_integer(long double))
4569         (__size_to_integer(__float128)): Cast return type explicitly.
4570         * include/bits/stl_uninitialized.h (__uninitialized_default_1<true>):
4571         Remove unused typedef.
4572
4573 2020-06-19  Jonathan Wakely  <jwakely@redhat.com>
4574
4575         * include/bits/stl_pair.h (_Index_tuple): Remove redundant
4576         namespace qualification.
4577         (pair::pair(tuple<>&, tuple<>&, _Index_tuple, _Index_tuple)):
4578         Likewise.
4579         * include/std/tuple (_Head_base, _Tuple_impl, tuple_size)
4580         (tuple_element, __get_helper, get, __make_tuple_impl)
4581         (__make_1st_indices, __tuple_concater)
4582         (pair::pair(tuple<>&, tuple<>&, _Index_tuple, _Index_tuple)):
4583         Likewise.
4584         * include/std/utility (tuple_element, __is_tuple_like_impl)
4585         (tuple_size, __pair_get, get): Likewise.
4586
4587 2020-06-19  Jonathan Wakely  <jwakely@redhat.com>
4588
4589         * include/bits/std_function.h (function): Define all member
4590         functions inline.
4591
4592 2020-06-19  Marc Glisse  <marc.glisse@inria.fr>
4593
4594         * include/bits/stl_algo.h (__includes): Simplify the code.
4595
4596 2020-06-19  Marc Glisse  <marc.glisse@inria.fr>
4597
4598         * include/std/optional (optional()): Explicitly define it.
4599
4600 2020-06-17  Jonathan Wakely  <jwakely@redhat.com>
4601
4602         PR libstdc++/94540
4603         * include/bits/stl_uninitialized.h (__uninitialized_default_1<true>):
4604         Construct the first value at *__first instead of on the stack.
4605         (__uninitialized_default_n_1<true>): Likewise.
4606         Improve comments on several of the non-standard algorithms.
4607         * testsuite/20_util/specialized_algorithms/uninitialized_default/94540.cc:
4608         New test.
4609         * testsuite/20_util/specialized_algorithms/uninitialized_default_n/94540.cc:
4610         New test.
4611         * testsuite/20_util/specialized_algorithms/uninitialized_value_construct/94540.cc:
4612         New test.
4613         * testsuite/20_util/specialized_algorithms/uninitialized_value_construct_n/94540.cc:
4614         New test.
4615         * testsuite/23_containers/vector/cons/94540.cc: New test.
4616
4617 2020-06-17  Jonathan Wakely  <jwakely@redhat.com>
4618
4619         * testsuite/20_util/specialized_algorithms/uninitialized_default_n/sizes.cc:
4620         Replace Value type with int so trivial code path is used.
4621         * testsuite/20_util/specialized_algorithms/uninitialized_value_construct_n/sizes.cc:
4622         Likewise.
4623
4624 2020-06-17  Jonathan Wakely  <jwakely@redhat.com>
4625
4626         * include/bits/stl_uninitialized.h (uninitialized_fill_n): Only
4627         use std::fill_n when the size is an integral type.
4628         (__uninitialized_default_n): Likewise.
4629         * testsuite/20_util/specialized_algorithms/uninitialized_default_n/sizes.cc:
4630         New test.
4631         * testsuite/20_util/specialized_algorithms/uninitialized_fill_n/sizes.cc:
4632         New test.
4633         * testsuite/20_util/specialized_algorithms/uninitialized_value_construct_n/sizes.cc:
4634         New test.
4635
4636 2020-06-16  Jonathan Wakely  <jwakely@redhat.com>
4637
4638         PR libstdc++/95282
4639         * include/bits/atomic_base.h (__atomic_impl::load): Use the _Val
4640         alias instead of deducing _Tp as an unqualified type.
4641         (__atomic_impl::exchange): Use the _Val alias to remove volatile
4642         from the reinterpret_cast result type.
4643
4644 2020-06-16  Jonathan Wakely  <jwakely@redhat.com>
4645
4646         * include/std/atomic (atomic): Add static assertions.
4647         * testsuite/29_atomics/atomic/requirements/types_neg.cc: New test.
4648
4649 2020-06-16  Patrick Palka  <ppalka@redhat.com>
4650
4651         PR libstdc++/94003
4652         * testsuite/20_util/is_constructible/94003.cc: New test.
4653
4654 2020-06-15  Jonathan Wakely  <jwakely@redhat.com>
4655
4656         * include/bits/char_traits.h (__cpp_lib_constexpr_char_traits):
4657         Update value for C++20.
4658         * include/std/version (__cpp_lib_constexpr_char_traits): Likewise.
4659         * testsuite/21_strings/char_traits/requirements/constexpr_functions_c++17.cc:
4660         Update expected value.
4661         * testsuite/21_strings/char_traits/requirements/constexpr_functions_c++20.cc:
4662         Likewise.
4663
4664 2020-06-15  Paul Keir  <paul.keir@uws.ac.uk>
4665
4666         * include/bits/char_traits.h (char_traits::move): constexpr move with
4667         overlap was using copy_backward incorrectly.
4668         * testsuite/21_strings/char_traits/requirements/constexpr_functions_c++20.cc:
4669         New test.
4670
4671 2020-06-12  Jonathan Wakely  <jwakely@redhat.com>
4672
4673         * testsuite/29_atomics/atomic_flag/clear/1.cc: Also test clear()
4674         when the value is currently set.
4675         * testsuite/29_atomics/atomic_flag/test_and_set/explicit.cc:
4676         Actually check the return value.
4677         * testsuite/29_atomics/atomic_flag/test_and_set/implicit.cc:
4678         Likewise.
4679
4680 2020-06-12  Jonathan Wakely  <jwakely@redhat.com>
4681
4682         * include/bits/atomic_base.h (atomic_flag::test): Add missing
4683         const qualifiers.
4684         * testsuite/29_atomics/atomic_flag/test/explicit.cc: Add
4685         dg-options and verify results of test function.
4686         * testsuite/29_atomics/atomic_flag/test/implicit.cc: Likewise.
4687
4688 2020-06-11  Jonathan Wakely  <jwakely@redhat.com>
4689
4690         PR libstdc++/94749
4691         * include/bits/istream.tcc (basic_istream::ignore(streamsize, CharT)):
4692         Only discard an extra character if we didn't already reach the
4693         maximum number.
4694         * src/c++98/istream.cc (istream::ignore(streamsiz, char))
4695         (wistream::ignore(streamsize, wchar_t)): Likewise.
4696         * testsuite/27_io/basic_istream/ignore/char/94749.cc: New test.
4697         * testsuite/27_io/basic_istream/ignore/wchar_t/94749.cc: New test.
4698
4699 2020-06-10  Patrick Palka  <ppalka@redhat.com>
4700
4701         PR libstdc++/95578
4702         * include/bits/ranges_algo.h (__lexicographical_compare_fn):
4703         Also check that the iterator and sentinel have the same type before
4704         applying the unwrapping optimization for __normal_iterator.
4705         Split the check into two, one for the first iterator/sentinel
4706         pair and another for second iterator/sentinel pair.  Remove uses
4707         of __niter_base, and remove uses of std::move on a
4708         __normal_iterator.
4709         * include/bits/ranges_algobase.h (__equal_fn): Likewise.
4710         (__copy_or_move): Likewise.  Perform similar adjustments for
4711         the reverse_iterator and move_iterator optimizations.  Inline
4712         the checks into the if-constexprs, and use using-declarations to
4713         make them less visually noisy.  Remove uses of __niter_wrap.
4714         (__copy_or_move_backward): Likewise.
4715         * testsuite/25_algorithms/copy/95578.cc: New test.
4716         * testsuite/25_algorithms/copy_backward/95578.cc: New test.
4717         * testsuite/25_algorithms/equal/95578.cc: New test.
4718         * testsuite/25_algorithms/lexicographical_compare/95578.cc: New test.
4719         * testsuite/25_algorithms/move/95578.cc: New test.
4720         * testsuite/25_algorithms/move_backward/95578.cc: New test.
4721
4722 2020-06-10  François Dumont  <fdumont@gcc.gnu.org>
4723             Jonathan Wakely  <jwakely@redhat.com>
4724
4725         * include/bits/deque.tcc (__lex_cmp_dit): New.
4726         (__lexicographical_compare_aux1): Define overloads for deque
4727         iterators.
4728         * include/bits/stl_algobase.h (__lexicographical_compare::__3way):
4729         New static member function.
4730         (__lexicographical_compare<true>::__3way): Likewise.
4731         (__lexicographical_compare<true>::__lc): Use __3way.
4732         (__lexicographical_compare_aux): Rename to
4733         __lexicographical_compare_aux1 and declare overloads for deque
4734         iterators.
4735         (__lexicographical_compare_aux): Define new forwarding function
4736         that calls __lexicographical_compare_aux1 and declare new overloads
4737         for safe iterators.
4738         (lexicographical_compare): Do not use __niter_base on
4739         parameters.
4740         * include/debug/safe_iterator.tcc
4741         (__lexicographical_compare_aux): Define overloads for safe
4742         iterators.
4743         * testsuite/25_algorithms/lexicographical_compare/1.cc: Add
4744         checks with random access iterators.
4745         * testsuite/25_algorithms/lexicographical_compare/deque_iterators/1.cc:
4746         New test.
4747
4748 2020-06-09  Jonathan Wakely  <jwakely@redhat.com>
4749
4750         * include/bits/stl_iterator.h (move_iterator::operator=): Define.
4751         * testsuite/24_iterators/move_iterator/dr3265.cc: New test.
4752
4753 2020-06-09  Jonathan Wakely  <jwakely@redhat.com>
4754
4755         * include/std/optional (bad_optional_access): Define default
4756         constructor and destructor as defaulted.
4757         * testsuite/20_util/optional/bad_access.cc: New test.
4758
4759 2020-06-08  Jonathan Wakely  <jwakely@redhat.com>
4760
4761         * testsuite/20_util/default_delete/48631_neg.cc: Adjust dg-error
4762         line number.
4763         * testsuite/20_util/default_delete/void_neg.cc: Likewise.
4764
4765 2020-06-08  Jonathan Wakely  <jwakely@redhat.com>
4766
4767         * include/bits/unique_ptr.h (operator<<): Define for C++20.
4768         * testsuite/20_util/unique_ptr/io/lwg2948.cc: New test.
4769
4770 2020-06-04  Jonathan Wakely  <jwakely@redhat.com>
4771
4772         * include/bits/iterator_concepts.h (__detail::__ptr, __detail::__ref)
4773         (__detail::__cat, __detail::__diff): Move to class scope in the
4774         relevant __iterator_traits specializations.
4775         (__iterator_traits<>): Use nested class templates instead of ones from
4776         namespace __detail.
4777         * include/bits/stl_iterator.h (__detail::__common_iter_ptr): Move to
4778         class scope in iterator_traits<common_iterator<I, S>>.
4779         (iterator_traits<common_iterator<I, S>>): Use nested class template
4780         instead of __detail::__common_iter_ptr.
4781
4782 2020-06-04  François Dumont  <fdumont@gcc.gnu.org>
4783
4784         * include/bits/stl_algo.h (__copy_n_a): Move to ...
4785         * include/bits/stl_algobase.h (__copy_n_a): ...here. Add __strict
4786         parameter.
4787         (__copy_n_a(istreambuf_iterator<>, _Size, _Deque_iterator<>, bool)):
4788         Declare.
4789         (__niter_base(const _Safe_iterator<_Ite, _Seq,
4790         random_access_iterator_tag>&)): Declare.
4791         (__copy_move_a2(istreambuf_iterator<>, istreambuf_iterator<>,
4792         _Deque_iterator<>)): Declare.
4793         * include/bits/deque.tcc
4794         (__copy_move_a2(istreambuf_iterator<>, istreambuf_iterator<>,
4795         _Deque_iterator<>)): New.
4796         (__copy_n_a(istreambuf_iterator<>, _Size, _Deque_iterator<>, bool)):
4797         New.
4798         * include/bits/streambuf_iterator.h
4799         (__copy_n_a(istreambuf_iterator<>, _Size, _CharT*, bool)): Adapt.
4800         * include/debug/safe_iterator.tcc (__niter_base): New.
4801         * testsuite/25_algorithms/copy/streambuf_iterators/char/4.cc
4802         (test03): New.
4803         * testsuite/25_algorithms/copy/streambuf_iterators/char/debug/deque_neg.cc:
4804         New test.
4805         * testsuite/25_algorithms/copy_n/debug/istreambuf_ite_deque_neg.cc:
4806         New test.
4807         * testsuite/25_algorithms/copy_n/istreambuf_iterator/2.cc: New test.
4808         * testsuite/25_algorithms/copy_n/istreambuf_iterator/deque.cc:
4809         New test.
4810
4811 2020-06-04  Jonathan Wakely  <jwakely@redhat.com>
4812
4813         * include/bits/ranges_algobase.h (__copy_n_fn): Only call
4814         ranges::copy for positive values.
4815         * include/bits/stl_algo.h (copy_n): Convert Size argument to an
4816         integral type and only call __copy_n for positive values.
4817         * testsuite/util/testsuite_iterators.h
4818         (random_access_iterator_wrapper::operator+=): Fix range check for
4819         negative values.
4820         (output_container, input_container, forward_container)
4821         (bidirectional_container, random_access_container): New alias
4822         templates.
4823         * testsuite/25_algorithms/copy_n/5.cc: New test.
4824
4825 2020-06-02  Jonathan Wakely  <jwakely@redhat.com>
4826
4827         PR libstdc++/90102
4828         * include/debug/deque (deque(const _Base&)): Replace parameter
4829         with a struct that wraps a const _Base&.
4830         * include/debug/forward_list (forward_list(_Base_ref)): New
4831         constructor.
4832         * include/debug/list (list(const _Base&)): Replace parameter
4833         with a struct that wraps a const _Base&.
4834         * include/debug/map.h (map(const _Base&)): Likewise.
4835         * include/debug/multimap.h (multimap(const _Base&)): Likewise.
4836         * include/debug/multiset.h (multiset(const _Base&)): Likewise.
4837         * include/debug/set.h (set(const _Base&)): Likewise.
4838         * include/debug/unordered_map (unordered_map(const _Base&))
4839         (unordered_multimap(const _Base&)): Likewise.
4840         * include/debug/unordered_set (unordered_set(const _Base&))
4841         (unordered_multiset(const _Base&)): Likewise.
4842         * testsuite/23_containers/vector/cons/destructible_debug_neg.cc:
4843         Adjust dg-error line number.
4844         * include/debug/vector (vector(const _Base&)): Likewise.
4845         * testsuite/23_containers/deque/debug/90102.cc: New test.
4846         * testsuite/23_containers/forward_list/debug/90102.cc: New test.
4847         * testsuite/23_containers/list/debug/90102.cc: New test.
4848         * testsuite/23_containers/map/debug/90102.cc: New test.
4849         * testsuite/23_containers/multimap/debug/90102.cc: New test.
4850         * testsuite/23_containers/multiset/debug/90102.cc: New test.
4851         * testsuite/23_containers/set/debug/90102.cc: New test.
4852         * testsuite/23_containers/unordered_map/debug/90102.cc: New test.
4853         * testsuite/23_containers/unordered_multimap/debug/90102.cc: New test.
4854         * testsuite/23_containers/unordered_multiset/debug/90102.cc: New test.
4855         * testsuite/23_containers/unordered_set/debug/90102.cc: New test.
4856         * testsuite/23_containers/vector/debug/90102.cc: New test.
4857
4858 2020-06-01  Jonathan Wakely  <jwakely@redhat.com>
4859
4860         PR libstdc++/95392
4861         * include/bits/fs_path.h (path::_S_to_string): Move to
4862         namespace-scope and rename to ...
4863         (__detail::__string_from_range): ... this.
4864         [WINDOWS] (__detail::__wstr_from_utf8): New function template to
4865         convert a char sequence containing UTF-8 to wstring.
4866         (path::_S_convert(Iter, Iter)): Adjust call to _S_to_string.
4867         (path::_S_convert_loc(Iter, Iter, const locale&)): Likewise.
4868         (u8path(InputIterator, InputIterator)) [WINDOWS]: Use
4869         __string_from_range to obtain a contiguous range and
4870         __wstr_from_utf8 to obtain a wide string.
4871         (u8path(const Source&)) [WINDOWS]: Use __effective_range to
4872         obtain a contiguous range and __wstr_from_utf8 to obtain a wide
4873         string.
4874         (path::_S_convert(const _EcharT*, const _EcharT)) [WINDOWS]:
4875         Use __wstr_from_utf8.
4876
4877 2020-06-01  Jonathan Wakely  <jwakely@redhat.com>
4878
4879         * testsuite/util/testsuite_iterators.h:
4880         (input_iterator_wrapper::operator++(int)): Return proxy object.
4881
4882 2020-06-01  Jonathan Wakely  <jwakely@redhat.com>
4883
4884         * doc/xml/manual/evolution.xml: Document deprecation of
4885         __is_nullptr_t and removal of std::allocator members.
4886         * doc/html/manual/api.html: Regenerate.
4887
4888 2020-06-01  Jonathan Wakely  <jwakely@redhat.com>
4889
4890         * doc/xml/manual/containers.xml: Replace <xref> with <link>.
4891         * doc/xml/manual/evolution.xml: Likewise.
4892         * doc/html/manual/api.html: Regenerate.
4893         * doc/html/manual/containers.html: Regenerate.
4894
4895 2020-06-01  Gerald Pfeifer  <gerald@pfeifer.com>
4896
4897         * doc/xml/faq.xml: Adjust Valgrind reference and remove another.
4898         * doc/html/faq.html: Regenerate.
4899
4900 2020-06-01  Gerald Pfeifer  <gerald@pfeifer.com>
4901
4902         * doc/xml/manual/policy_data_structures_biblio.xml: Remove
4903         stray change.
4904
4905 2020-06-01  Gerald Pfeifer  <gerald@pfeifer.com>
4906
4907         * doc/xml/manual/policy_data_structures_biblio.xml: Switch
4908         www.cs.princeton.edu to https.
4909         * doc/html/manual/policy_data_structures.html: Regenerate.
4910
4911 2020-05-31  Douglas B Rupp  <douglas.b.rupp@gmail.com>
4912
4913         * crossconfig.m4 (<*-vxworks>): Check for more math decls.
4914         * configure: Rebuild.
4915
4916 2020-05-29  H.J. Lu  <hjl.tools@gmail.com>
4917
4918         PR bootstrap/95413
4919         * configure: Regenerated.
4920
4921 2020-05-29  François Dumont  <fdumont@gcc.gnu.org>
4922
4923         PR libstdc++/95079
4924         * include/bits/hashtable_policy.h (_Insert_base<>::try_emplace): New.
4925         * include/bits/unordered_map.h (unordered_map<>::try_emplace): Adapt.
4926         (unordered_map<>::insert_or_assign): Adapt.
4927
4928 2020-05-27  Jonathan Wakely  <jwakely@redhat.com>
4929
4930         PR libstdc++/95282
4931         * include/bits/atomic_base.h (__atomic_impl::load): Add
4932         cv-qualifiers to parameter so that _Tp is deduced as the
4933         unqualified type.
4934         * testsuite/29_atomics/atomic_float/95282.cc: New test.
4935
4936 2020-05-27  Jonathan Wakely  <jwakely@redhat.com>
4937
4938         PR libstdc++/95322
4939         * include/std/ranges (transform_view::_Sentinel): Allow hidden
4940         friends to work with _Iterator<true> and _Iterator<false>.
4941         (join_view::_Sentinel): Likewise.
4942         * testsuite/std/ranges/adaptors/95322.cc: New test.
4943
4944 2020-05-27  Jonathan Wakely  <jwakely@redhat.com>
4945
4946         PR libstdc++/94354
4947         * include/bits/stl_iterator.h (reverse_iterator): Fix comparison
4948         operators to use the correct operations on the underlying
4949         iterators.
4950         * testsuite/24_iterators/reverse_iterator/rel_ops.cc: New test.
4951
4952 2020-05-27  Jonathan Wakely  <jwakely@redhat.com>
4953
4954         * testsuite/18_support/comparisons/categories/zero_neg.cc: New test.
4955
4956 2020-05-26  Patrick Palka  <ppalka@redhat.com>
4957
4958         PR libstdc++/95322
4959         * include/bits/stl_iterator.h (__detail::_Common_iter_proxy):
4960         Remove and instead define it ...
4961         (common_iterator::_Proxy): ... here.
4962         (common_iterator::operator->): Use it.
4963         * testsuite/24_iterators/common_iterator/2.cc: New test.
4964         * testsuite/std/ranges/adaptors/95322.cc: New test.
4965
4966 2020-05-23  Patrick Palka  <ppalka@redhat.com>
4967
4968         PR libstdc++/93978
4969         * testsuite/std/ranges/adaptors/93978.cc: Add -Wall to
4970         dg-additional-options.  Avoid unused-but-set-variable warning.
4971
4972 2020-05-23  Jonathan Wakely  <jwakely@redhat.com>
4973
4974         PR libstdc++/95289
4975         * include/debug/helper_functions.h (__get_distance): Only declare
4976         as a constexpr function for C++14 and up.
4977         * testsuite/25_algorithms/copy/debug/95289.cc: New test.
4978
4979         * include/bits/fs_path.h (__detail::_S_range_begin)
4980         (__detail::_S_range_end, path::_S_string_from_iter): Replace with
4981         overloaded function template __detail::__effective_range.
4982         (__detail::__effective_range): New overloaded function template to
4983         create a basic_string or basic_string_view for an effective range.
4984         (__detail::__value_type_is_char): Use __detail::__effective_range.
4985         Do not use remove_const on value type.
4986         (__detail::__value_type_is_char_or_char8_t): Likewise.
4987         (path::path(const Source&, format))
4988         (path::path(const Source&, const locale&))
4989         (path::operator/=(const Source&), path::append(const Source&))
4990         (path::concat(const Source&)): Use __detail::__effective_range.
4991         (path::_S_to_string(InputIterator, InputIterator)): New function
4992         template to create a string view if possible, or string otherwise.
4993         (path::_S_convert): Add overloads that convert a string returned
4994         by __detail::__effective_range. Use if-constexpr to inline conversion
4995         logic from all overloads of _Cvt::_S_convert.
4996         (path::_S_convert_loc): Add overload that converts a string. Use
4997         _S_to_string to avoid allocation when possible.
4998         (path::_Cvt): Remove.
4999         (path::operator+=(CharT)): Remove indirection through path::concat.
5000         * include/experimental/bits/fs_path.h (path::_S_convert_loc): Add
5001         overload for non-const pointers, to avoid constructing a std::string.
5002         * src/c++17/fs_path.cc (path::_S_convert_loc): Replace conditional
5003         compilation with call to _S_convert.
5004
5005         * include/bits/fs_path.h (__detail::_S_range_begin)
5006         (__detail::_S_range_end): Remove unintentional static specifiers.
5007         * include/experimental/bits/fs_path.h (__detail::_S_range_begin)
5008         (__detail::_S_range_end): Likewise.
5009
5010         * include/bits/fs_path.h (filesystem::__detail::__is_encoded_char):
5011         Replace alias template with variable template. Don't remove const.
5012         (filesystem::__detail::__is_path_src): Replace overloaded function
5013         template with variable template and specializations.
5014         (filesystem::__detail::__is_path_iter_src): Replace alias template
5015         with class template.
5016         (filesystem::__detail::_Path): Use __is_path_src. Remove support for
5017         iterator pairs.
5018         (filesystem::__detail::_Path2): New alias template for checking
5019         InputIterator requirements.
5020         (filesystem::__detail::__constructible_from): Remove.
5021         (filesystem::path): Replace _Path<Iter, Iter> with _Path2<Iter>.
5022         * testsuite/27_io/filesystem/path/construct/80762.cc: Check with two
5023         constructor arguments of void and void* types.
5024
5025 2020-05-21  Matthias Kretz  <kretz@kde.org>
5026
5027         * testsuite/Makefile.am: Remove dup target_triplet and set tool,
5028         allowing runtest to work without arguments.
5029         * testsuite/Makefile.in: Regenerate.
5030
5031 2020-05-21  Jonathan Wakely  <jwakely@redhat.com>
5032
5033         PR libstdc++/93983
5034         * include/bits/iterator_concepts.h (__detail::__cpp17_iterator):
5035         Reorder constraints to avoid recursion when constructors use
5036         iterator_traits (LWG 3420).
5037         * testsuite/24_iterators/customization_points/lwg3420.cc: New test.
5038
5039         * include/experimental/socket (basic_socket::is_open()
5040         (basic_socket_acceptor::is_open()): Use _GLIBCXX_NODISCARD macro.
5041
5042         * include/experimental/bits/net.h (__endpoint, __protocol)
5043         (__acceptable_protocol, __inet_protocol): New concepts.
5044         (__detail::__is_endpoint): Move trait from <experimental/socket>.
5045         (__is_protocol, __is_acceptable_protocol, __is_inet_protocol): New
5046         traits.
5047         (__endpoint, __protocol, __acceptable_protocol): New variable
5048         templates.
5049         * include/experimental/socket (__is_endpoint): Move to net.h header.
5050         (basic_socket, basic_socket_acceptor): Check requirements.
5051
5052         * include/experimental/executor (use_future_t::use_future_t()): Fix
5053         incorrect noexcept-specifier.
5054         * include/experimental/internet (basic_resolver_results): Adjust
5055         whitespace.
5056         * include/experimental/socket (__basic_socket_impl::release): Add
5057         member function.
5058         (basic_socket(io_context&, const endpoint_type&)): Fix argument to
5059         target constructor.
5060         (basic_socket::release(), basic_socket::release(error_code&)): Add
5061         missing member functions.
5062         (basic_socket::is_open()): Add nodiscard attribute.
5063         (basic_socket::close(error_code&)): Pass argument to base function.
5064         (basic_socket_acceptor::release())
5065         (basic_socket_acceptor::release(error_code&)): Add missing member
5066         functions.
5067         (basic_socket_acceptor::is_open()): Add nodiscard attribute.
5068         (basic_socket_streambuf::error()): Add noexcept.
5069         (basic_socket_iostream::error()): Likewise.
5070         * testsuite/experimental/net/socket/basic_socket.cc: New test.
5071
5072         * include/experimental/buffer: Replace typedefs with
5073         alias-declarations.
5074         * include/experimental/executor: Likewise.
5075         * include/experimental/internet: Likewise.
5076         * include/experimental/socket: Likewise.
5077         * include/experimental/timer: Likewise.
5078
5079 2020-05-19  Jonathan Wakely  <jwakely@redhat.com>
5080
5081         PR libstdc++/94087
5082         * src/c++11/random.cc (__x86_rdseed): Allow fallback function to be
5083         passed in.
5084         (__x86_rdseed_rdrand): New function that uses rdseed with rdrand
5085         fallback.
5086         (random_device::_M_init): Use __x86_rdseed_rdrand when both
5087         instructions are available.
5088         * testsuite/26_numerics/random/random_device/94087.cc: New test.
5089
5090 2020-05-19  Patrick Palka  <ppalka@redhat.com>
5091
5092         PR c++/66439
5093         * testsuite/20_util/pair/astuple/get_neg.cc: Prune "type/value
5094         mismatch" messages.
5095         * testsuite/20_util/tuple/element_access/get_neg.cc: Likewise.
5096
5097 2020-05-15  H.J. Lu  <hongjiu.lu@intel.com>
5098
5099         PR bootstrap/95147
5100         * configure: Regenerated.
5101
5102 2020-05-14  H.J. Lu  <hongjiu.lu@intel.com>
5103
5104         * configure: Regenerated.
5105
5106 2020-05-13  Alexandre Oliva <oliva@adacore.com>
5107
5108         PR libstdc++/77691
5109         * include/experimental/memory_resource
5110         (__resource_adaptor_imp::do_allocate): Handle max_align_t on
5111         x86-vxworks as on x86-solaris.
5112         (__resource_adaptor_imp::do_deallocate): Likewise.
5113         * testsuite/experimental/memory_resource/new_delete_resource.cc:
5114         Drop xfail.
5115         (BAD_MAX_ALIGN_T): Define on x86-vxworks as on x86-solaris.
5116         (test03): Drop max-align test for char-aligned alloc.
5117
5118 2020-05-08  Ulrich Drepper  <drepper@redhat.com>
5119
5120         * include/bits/atomic_base.h (atomic_flag): Implement test member
5121         function.
5122         * include/std/version: Define __cpp_lib_atomic_flag_test.
5123         * testsuite/29_atomics/atomic_flag/test/explicit.cc: New file.
5124         * testsuite/29_atomics/atomic_flag/test/implicit.cc: New file.
5125
5126 2020-05-07  Jonathan Wakely  <jwakely@redhat.com>
5127
5128         PR libstdc++/94971 (partial)
5129         * include/bits/ranges_algo.h (ranges::__sample_fn): Qualify
5130         std::sample using macro to work in parallel mode.
5131         (__sort_fn): Likewise for std::sort.
5132         (ranges::__nth_element_fn): Likewise for std::nth_element.
5133         * include/bits/stl_algobase.h (lexicographical_compare_three_way):
5134         Likewise for std::__min_cmp.
5135         * include/parallel/algobase.h (lexicographical_compare_three_way):
5136         Add to namespace std::__parallel.
5137
5138         PR c/92472
5139         * include/parallel/multiway_merge.h (_GuardedIterator::operator*)
5140         (_GuardedIterator::operator _RAIter, _UnguardedIterator::operator*)
5141         (_UnguardedIterator::operator _RAIter): Add const qualifier.
5142         (operator<(_GuardedIterator&, _GuardedIterator&)
5143         (operator<=(_GuardedIterator&, _GuardedIterator&)
5144         (operator<(_UnguardedIterator&, _UnguardedIterator&)
5145         (operator<=(_UnguardedIterator&, _UnguardedIterator&): Change
5146         parameters to const references.
5147
5148 2020-05-07  Eric Botcazou  <ebotcazou@adacore.com>
5149
5150         * config/abi/post/sparc64-linux-gnu/baseline_symbols.txt: Update.
5151         * config/abi/post/sparc64-linux-gnu/32/baseline_symbols.txt: Likewise.
5152
5153 2020-05-06  François Dumont  <fdumont@gcc.gnu.org>
5154
5155         * include/bits/stl_algobase.h (struct _Bit_iterator): New declaration.
5156         (std::__fill_a1(_Bit_iterator, _Bit_iterator, const bool&)): Likewise.
5157         * include/bits/stl_bvector.h (__fill_bvector): Move outside
5158         _GLIBCXX_STD_C namespace.
5159         (fill(_Bit_iterator, _Bit_iterator, const bool&)): Likewise and rename
5160         into...
5161         (__fill_a1): ...this.
5162         * testsuite/25_algorithms/fill/bvector/1.cc: New.
5163
5164 2020-05-06  H.J. Lu  <hongjiu.lu@intel.com>
5165
5166         * config/abi/post/x86_64-linux-gnu/x32/baseline_symbols.txt: Updated.
5167
5168 2020-05-06  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
5169
5170         * config/abi/post/i386-solaris/baseline_symbols.txt: Regenerate.
5171         * config/abi/post/i386-solaris/amd64/baseline_symbols.txt:
5172         Likewise.
5173         * config/abi/post/sparc-solaris/baseline_symbols.txt: Likewise.
5174         * config/abi/post/sparc-solaris/sparcv9/baseline_symbols.txt:
5175         Likewise.
5176
5177 2020-05-06  Martin Liska  <mliska@suse.cz>
5178
5179         Revert:
5180         2020-05-05  Martin Liska  <mliska@suse.cz>
5181         PR c/92472
5182         * include/parallel/multiway_merge.h:
5183         Use const for _Compare template argument.
5184
5185 2020-05-06  Jonathan Wakely  <jwakely@redhat.com>
5186
5187         * doc/xml/manual/abi.xml (abi.versioning.history): Document library
5188         versions for GCC 9.[123] and 10.1 releases.
5189         * doc/html/*: Regenerate.
5190
5191 2020-05-06  Jakub Jelinek  <jakub@redhat.com>
5192
5193         * config/abi/post/x86_64-linux-gnu/baseline_symbols.txt: Update.
5194         * config/abi/post/x86_64-linux-gnu/32/baseline_symbols.txt: Update.
5195         * config/abi/post/i386-linux-gnu/baseline_symbols.txt: Update.
5196         * config/abi/post/i486-linux-gnu/baseline_symbols.txt: Update.
5197         * config/abi/post/aarch64-linux-gnu/baseline_symbols.txt: Update.
5198         * config/abi/post/s390x-linux-gnu/baseline_symbols.txt: Update.
5199         * config/abi/post/powerpc64-linux-gnu/baseline_symbols.txt: Update.
5200
5201 2020-05-05  Martin Liska  <mliska@suse.cz>
5202
5203         PR c/92472
5204         * include/parallel/multiway_merge.h:
5205         Use const for _Compare template argument.
5206
5207 2020-05-04  Fangrui Song  <maskray@google.com>
5208
5209         * libsupc++/cxxabi.h (__cxa_finalize): Fix return type.
5210
5211 2020-05-04  Jonathan Wakely  <jwakely@redhat.com>
5212
5213         * doc/xml/faq.xml: Use working link for SGI STL FAQ.
5214         * doc/html/*: Regenerate.
5215
5216         PR libstdc++/94906
5217         * src/c++17/memory_resource.cc
5218         (monotonic_buffer_resource::_Chunk::release): Use size_t for shift
5219         operands.
5220
5221 2020-05-04  Nathan Sidwell  <nathan@acm.org>
5222
5223         PR libstdc++/94747
5224         * libsupc++/dyncast.cc (__dynamic_cast): Cast offsetof to
5225         ptrdiff_t before negation, to show intent more clearly.
5226
5227 2020-05-04  Jonathan Wakely  <jwakely@redhat.com>
5228
5229         PR libstdc++/94936
5230         * src/c++17/memory_resource.cc (synchronized_pool_resource::_TPools):
5231         Add comment about single-threaded behaviour.
5232         (synchronized_pool_resource::_TPools::move_nonempty_chunks()): Hoist
5233         class member access out of loop.
5234         (synchronized_pool_resource::synchronized_pool_resource())
5235         (synchronized_pool_resource::~synchronized_pool_resource())
5236         (synchronized_pool_resource::release()): Check __gthread_active_p
5237         before creating and/or deleting the thread-specific data key.
5238         (synchronized_pool_resource::_M_thread_specific_pools()): Adjust
5239         assertions.
5240         (synchronized_pool_resource::do_allocate(size_t, size_t)): Add fast
5241         path for single-threaded case.
5242         (synchronized_pool_resource::do_deallocate(void*, size_t, size_t)):
5243         Likewise. Return if unable to find a pool that owns the allocation.
5244         * testsuite/20_util/synchronized_pool_resource/allocate_single.cc:
5245         New test.
5246         * testsuite/20_util/synchronized_pool_resource/cons_single.cc: New
5247         test.
5248         * testsuite/20_util/synchronized_pool_resource/release_single.cc: New
5249         test.
5250
5251 2020-05-03  Jonathan Wakely  <jwakely@redhat.com>
5252
5253         PR libstdc++/94933
5254         * include/bits/stl_algobase.h (__fill_a1): Make overload for byte types
5255         usable in constant expressions.
5256         * testsuite/25_algorithms/fill_n/constexpr.cc: Test with bytes and
5257         non-scalars.
5258
5259 2020-05-01  Jonathan Wakely  <jwakely@redhat.com>
5260
5261         PR libstdc++/94901
5262         * testsuite/17_intro/badnames.cc: Test values between _E9 and _E24 too.
5263
5264 2020-05-01  Jonathan Wakely  <jwakely@redhat.com>
5265             Patrick Palka  <ppalka@redhat.com>
5266
5267         PR libstdc++/92894
5268         * include/bits/iterator_concepts.h (ranges::__cust_imove::_IMove):
5269         Add trait to determine return type and an alias for it.
5270         (ranges::__cust_imove::_IMove::operator()): Use __result instead of
5271         deduced return type.
5272         (iter_rvalue_reference_t): Use _IMove::__type instead of checking
5273         the result of ranges::iter_move.
5274         (__detail::__indirectly_readable_impl): Use iter_rvalue_reference_t
5275         instead of checking the result of ranges::iter_move.
5276         * testsuite/24_iterators/customization_points/92894.cc: New test.
5277         * testsuite/24_iterators/indirect_callable/92894.cc: New test.
5278
5279 2020-05-01  Jonathan Wakely  <jwakely@redhat.com>
5280
5281         PR libstdc++/94901
5282         * include/std/type_traits (__is_complete_or_unbounded): Replace
5283         BADNAME _T with _Tp.
5284         * testsuite/17_intro/badnames.cc: New test.
5285
5286 2020-04-30  Jonathan Wakely  <jwakely@redhat.com>
5287
5288         PR libstdc++/89510
5289         * include/bits/alloc_traits.h (allocator_traits::_S_construct)
5290         (allocator_traits::_S_destroy)
5291         (allocator_traits<allocator<T>>::construct): Use traits in
5292         noexcept-specifiers.
5293         * include/bits/allocator.h (allocator<void>::construct)
5294         (allocator<void>::destroy): Likewise.
5295         * include/ext/malloc_allocator.h (malloc_allocator::construct)
5296         (malloc_allocator::destroy): Likewise.
5297         * include/ext/new_allocator.h (new_allocator::construct)
5298         (new_allocator::destroy): Likewise.
5299         * testsuite/20_util/allocator/89510.cc: New test.
5300         * testsuite/ext/malloc_allocator/89510.cc: New test.
5301         * testsuite/ext/new_allocator/89510.cc: New test.
5302
5303 2020-04-29  Jonathan Wakely  <jwakely@redhat.com>
5304
5305         PR libstdc++/94854
5306         * include/bits/basic_string.tcc: Update comment about explicit
5307         instantiations.
5308
5309 2020-04-28  Jonathan Wakely  <jwakely@redhat.com>
5310
5311         PR libstdc++/91480
5312         * include/bits/allocator.h (__cpp_lib_allocator_is_always_equal):
5313         Remove non-standard macro.
5314         * include/bits/stl_iterator.h (__cpp_lib_constexpr_iterator): Define
5315         to indicate P1032R1 support.
5316         * include/bits/stl_pair.h (__cpp_lib_constexpr_utility): Likewise.
5317         * include/std/string_view (__cpp_lib_constexpr_string_view): Likewise.
5318         * include/std/tuple (__cpp_lib_constexpr_tuple): Likewise.
5319         * include/std/version (__cpp_lib_allocator_is_always_equal): Remove.
5320         (__cpp_lib_constexpr_iterator, __cpp_lib_constexpr_string_view)
5321         (__cpp_lib_constexpr_tuple, __cpp_lib_constexpr_utility): Define.
5322         * testsuite/20_util/function_objects/constexpr_searcher.cc: Check
5323         feature test macro.
5324         * testsuite/20_util/tuple/cons/constexpr_allocator_arg_t.cc: Likewise.
5325         * testsuite/21_strings/basic_string_view/operations/copy/char/
5326         constexpr.cc: Likewise.
5327         * testsuite/24_iterators/insert_iterator/constexpr.cc: Likewise.
5328
5329         PR libstdc++/94831
5330         * include/bits/alloc_traits.h (_S_construct): Restore placement
5331         new-expression for C++11/14/17 and call std::construct_at directly
5332         for C++20.
5333         * include/bits/stl_construct.h (_Construct): Revert to non-constexpr
5334         function returning void.
5335         * testsuite/20_util/specialized_algorithms/
5336         uninitialized_value_construct/94831.cc: New test.
5337         * testsuite/23_containers/vector/cons/94831.cc: New test.
5338
5339 2020-04-28  Patrick Palka  <ppalka@redhat.com>
5340
5341         LWG 3433 subrange::advance(n) has UB when n < 0
5342         * include/std/ranges (subrange::prev): Fix typo.
5343         (subrange::advance): Handle a negative argument as per the proposed
5344         resolution of LWG 3433.
5345         * testsuite/std/ranges/subrange/lwg3433.cc: New test.
5346
5347 2020-04-28  Jonathan Wakely  <jwakely@redhat.com>
5348             Iain Sandoe  <iain@sandoe.co.uk>
5349
5350         PR c++/94759
5351         * include/std/coroutine: Implement handing for non-
5352         class coroutine return types.
5353
5354 2020-04-24  Jonathan Wakely  <jwakely@redhat.com>
5355
5356         * include/experimental/executor (service_already_exists): Make default
5357         constructor public (LWG 3414).
5358         * testsuite/experimental/net/execution_context/make_service.cc: Check
5359         the service_already_exists can be default constructed.
5360
5361 2020-04-24  Kamlesh Kumar  <kamleshbhalui@gmail.com>
5362             Jonathan Wakely  <jwakely@redhat.com>
5363
5364         PR libstdc++/90415
5365         PR libstdc++/92156
5366         * include/std/any (any): Rename template parameters for consistency
5367         with the standard.
5368         (any::_Decay): Rename to _Decay_if_not_any.
5369         (any::any(T&&):: Remove is_constructible from constraints. Remove
5370         non-standard overload.
5371         (any::any(in_place_type_t<T>, Args&&...))
5372         (any::any(in_place_type_t<T>, initializer_list<U>, Args&&...))
5373         (any::emplace(Args&&...))
5374         (any::emplace(initializer_list<U>, Args&&...)):
5375         Use decay_t instead of _Decay.
5376         * testsuite/20_util/any/cons/90415.cc: New test.
5377         * testsuite/20_util/any/cons/92156.cc: New Test.
5378         * testsuite/20_util/any/misc/any_cast_neg.cc: Make dg-error directives
5379         more robust.
5380         * testsuite/20_util/any/modifiers/92156.cc: New test.
5381
5382 2020-04-23  Jonathan Wakely  <jwakely@redhat.com>
5383
5384         * doc/xml/manual/status_cxx2020.xml: Update C++20 status table.
5385         * doc/html/*: Regenerate.
5386
5387         * include/bits/stl_iterator.h (__cpp_lib_array_constexpr): Revert
5388         value for C++17 to 201803L because P0858R0 is supported for C++17.
5389         * include/std/version (__cpp_lib_array_constexpr): Likewise.
5390         * testsuite/23_containers/array/element_access/constexpr_c++17.cc:
5391         Check for value corresponding to P0031R0 features being tested.
5392         * testsuite/23_containers/array/requirements/constexpr_iter.cc:
5393         Check for value corresponding to P0858R0 features being tested.
5394
5395         * include/std/version (__cpp_lib_three_way_comparison): Define for
5396         freestanding builds.
5397
5398 2020-04-23  Thomas Rodgers  <rodgert@appliantology.com>
5399
5400         * include/experimental/net/executor (system_context): Mark
5401         system_context::system_context() = delete.
5402         * testsuite/experimental/net/executor/1.cc: Add new
5403         test to check system_context is not default constructible.
5404
5405 2020-04-23  Iain Sandoe  <iain@sandoe.co.uk>
5406
5407         * include/std/coroutine: Update the inline namespace to __n4861.
5408         Add the __cpp_lib_coroutine define, set to 201902L.
5409         * include/std/version: Add __cpp_lib_coroutine, set to 201902L.
5410
5411 2020-04-22  Jonathan Wakely  <jwakely@redhat.com>
5412
5413         * include/std/execution (__cpp_lib_execution): Define to indicate
5414         support for P0024R2 and P1001R2.
5415         * include/std/version (__cpp_lib_execution): Define.
5416         * testsuite/25_algorithms/pstl/feature_test.cc: Only test macro
5417         defined by <algorithm>, move other tests to new tests ...
5418         * testsuite/25_algorithms/pstl/feature_test-2.cc: New test.
5419         * testsuite/25_algorithms/pstl/feature_test-3.cc: New test.
5420         * testsuite/25_algorithms/pstl/feature_test-4.cc: New test.
5421         * testsuite/25_algorithms/pstl/feature_test-5.cc: New test.
5422
5423         * include/bits/stl_iterator.h (__cpp_lib_array_constexpr): Define
5424         different values for C++17 and C++20, to indicate different feature
5425         sets. Update value for C++20 to indicate P1032R1 support.
5426         * include/std/version (__cpp_lib_array_constexpr): Likewise.
5427         * testsuite/23_containers/array/comparison_operators/constexpr.cc:
5428         Check feature test macro.
5429         * testsuite/23_containers/array/element_access/constexpr_c++17.cc:
5430         New test.
5431         * testsuite/23_containers/array/requirements/constexpr_fill.cc: Check
5432         feature test macro.
5433         * testsuite/23_containers/array/requirements/constexpr_iter.cc: Test
5434         in C++17 mode and check feature test macro.
5435
5436         * include/std/utility (__cpp_lib_constexpr_algorithms): Do not define
5437         here.
5438         * testsuite/20_util/exchange/constexpr.cc: Do not expect macro to be
5439         defined by <utility>.
5440
5441         * include/std/functional (__cpp_lib_concepts): Update macro value to
5442         indicate P1964R2 support.
5443         * include/std/version (__cpp_lib_concepts): Likewise.
5444         * testsuite/std/concepts/1.cc: Adjust expected value.
5445         * testsuite/std/concepts/2.cc: Likewise.
5446
5447         * include/std/functional (__cpp_lib_constexpr_invoke): Rename to
5448         __cpp_lib_constexpr_functional.
5449         * include/std/version (__cpp_lib_constexpr_invoke): Likewise.
5450         * testsuite/20_util/function_objects/invoke/constexpr.cc: Adjust.
5451
5452         * include/bits/ptr_traits.h (__cpp_lib_constexpr_memory): Define to
5453         indicate P1006R1 support.
5454         (__cpp_lib_to_address): Define to indicate P0653R2 support.
5455         * include/bits/range_access.h (__cpp_lib_ssize): Define to indicate
5456         P1227R2 support.
5457         * include/bits/ranges_algo.h (__cpp_lib_shift): Define to indicate
5458         P0769R2 support.
5459         * include/std/atomic (__cpp_lib_atomic_float): Define to indicate
5460         P0020R6 support.
5461         * include/std/memory (__cpp_lib_assume_aligned): Define to indicate
5462         P1007R3 support.
5463         * include/std/memory_resource (__cpp_lib_polymorphic_allocator):
5464         Define to indicate P0339R6 support.
5465         * include/std/string_view (__cpp_lib_starts_ends_with): Define to
5466         indicate P0457R2 support.
5467         * include/std/type_traits (__cpp_lib_is_nothrow_convertible): Define
5468         to indicate P0758R1 support.
5469         (__cpp_lib_remove_cvref): Define to indicate P0550R2 support.
5470         (__cpp_lib_type_identity): Define to indicate P0887R1 support.
5471         * include/std/version (__cpp_lib_atomic_float)
5472         (__cpp_lib_is_nothrow_convertible, __cpp_lib_remove_cvref)
5473         (__cpp_lib_type_identity, __cpp_lib_assume_aligned)
5474         (__cpp_lib_constexpr_memory, __cpp_lib_polymorphic_allocator)
5475         (__cpp_lib_shift, __cpp_lib_ssize, __cpp_lib_starts_ends_with)
5476         (__cpp_lib_to_address): Define.
5477         * testsuite/20_util/to_address/1_neg.cc: Adjust dg-error line number.
5478
5479         * include/bits/stl_map.h (__cpp_lib_map_insertion): Remove old
5480         macro.
5481         * include/bits/unordered_map.h (__cpp_lib_unordered_map_insertion):
5482         Likewise.
5483         * include/std/version (__cpp_lib_map_insertion)
5484         (__cpp_lib_unordered_map_insertion): Remove.
5485
5486         * include/std/condition_variable (__cpp_lib_jthread): Remove
5487         redundant definition.
5488         * include/std/stop_token (__cpp_lib_jthread): Update macro value to
5489         indicate P1869R1 support.
5490         * include/std/version (__cpp_lib_jthread): Update value.
5491         * testsuite/30_threads/condition_variable_any/stop_token/1.cc: Check
5492         for updated macro value.
5493         * testsuite/30_threads/condition_variable_any/stop_token/2.cc:
5494         Likewise.
5495         * testsuite/30_threads/jthread/1.cc: Likewise.
5496         * testsuite/30_threads/jthread/2.cc: Likewise.
5497         * testsuite/30_threads/stop_token/1.cc: Likewise.
5498         * testsuite/30_threads/stop_token/2.cc: Likewise.
5499
5500         * testsuite/21_strings/basic_string/erasure.cc: Check for
5501         __cpp_lib_erase_if macro.
5502         * testsuite/23_containers/deque/erasure.cc: Add header name to #error
5503         messages.
5504         * testsuite/23_containers/forward_list/erasure.cc: Likewise.
5505         * testsuite/23_containers/list/erasure.cc: Likewise.
5506         * testsuite/23_containers/map/erasure.cc: Likewise.
5507         * testsuite/23_containers/set/erasure.cc: Likewise.
5508         * testsuite/23_containers/unordered_map/erasure.cc: Likewise.
5509         * testsuite/23_containers/unordered_set/erasure.cc: Likewise.
5510         * testsuite/23_containers/vector/erasure.cc: Likewise.
5511
5512 2020-04-21  Jonathan Wakely  <jwakely@redhat.com>
5513
5514         * include/bits/stl_iterator.h (__normal_iterator): Use synth-three-way
5515         to define operator<=>.
5516         * testsuite/24_iterators/normal_iterator/cmp_c++20.cc: New test.
5517
5518         * doc/Makefile.am (xml_sources_manual): Add missing XML files.
5519         * doc/Makefile.in: Regenerate.
5520         * doc/xml/manual/status_cxx1998.xml: Refer to "this section" instead
5521         of "this page".
5522         * doc/xml/manual/status_cxx2011.xml: Formatting and other corrections
5523         to the C++11 status table.
5524         * doc/xml/manual/status_cxx2014.xml: Replace list of C++14 feature
5525         proposals with table matching contents of the C++14 standard.
5526         * doc/xml/manual/status_cxx2017.xml: Add table matching contents of
5527         the C++17 standard.
5528         * doc/html/*: Regenerate.
5529
5530         PR c++/94149
5531         * include/std/type_traits (__is_nt_constructible_impl): Add partial
5532         specializations for bounded arrays with non-empty initializers.
5533         * testsuite/20_util/is_nothrow_constructible/value_c++20.cc: New test.
5534
5535 2020-04-20  Thomas Rodgers  <trodgers@redhat.com>
5536
5537         * testsuite/lib/libstdc++.exp: Add additional_flags=
5538         -DTBB_SUPRESS_DEPRECATED_MESSAGES=1 to suppress warnings when
5539         compiling with a newer Thread Building Blocks.
5540
5541 2020-04-20  Jonathan Wakely  <jwakely@redhat.com>
5542
5543         * testsuite/24_iterators/istreambuf_iterator/sentinel.cc: New test.
5544
5545         * testsuite/20_util/is_constructible/51185.cc: Make test class a
5546         non-aggregate so that the test verifies the same thing in all -std
5547         modes.
5548         * testsuite/20_util/is_constructible/value-2.cc: Adjust expected
5549         results for some types when paren-init for aggregates is supported.
5550
5551         * include/std/version (__cpp_lib_three_way_comparison): Update value.
5552         * libsupc++/compare (__cpp_lib_three_way_comparison): Likewise.
5553         (__detail::__synth3way): Add noexcept-specifier.
5554
5555         * include/bits/stl_map.h (map): Define operator<=> and remove
5556         operator< for C++20.
5557         * include/bits/stl_multimap.h (multimap): Likewise.
5558         * include/bits/stl_multiset.h (multiset): Likewise.
5559         * include/bits/stl_set.h (set): Likewise.
5560         * include/bits/stl_tree.h (_Rb_tree): Likewise.
5561         (_Rb_tree_iterator, _Rb_tree_const_iterator): Remove redundant
5562         operator!= for C++20.
5563         * include/debug/map.h (__gnu_debug::map): Define operator<=> for C++20.
5564         * include/debug/multimap.h (__gnu_debug::multimap): Likewise.
5565         * include/debug/multiset.h (__gnu_debug::multiset): Likewise.
5566         * include/debug/set.h (__gnu_debug::set): Likewise.
5567         * testsuite/23_containers/map/operators/cmp_c++20.cc: New test.
5568         * testsuite/23_containers/multimap/operators/cmp_c++20.cc: New test.
5569         * testsuite/23_containers/multiset/operators/cmp_c++20.cc: New test.
5570         * testsuite/23_containers/set/operators/cmp_c++20.cc: New test.
5571
5572 2020-04-20  Matthias Kretz  <kretz@kde.org>
5573
5574         * testsuite/lib/libstdc++.exp: Avoid illegal argument to verbose.
5575
5576 2020-04-19  Jonathan Wakely  <jwakely@redhat.com>
5577
5578         * include/bits/stl_queue.h (queue): Define operator<=> for C++20.
5579         * include/bits/stl_stack.h (stack): Likewise.
5580         * testsuite/23_containers/queue/cmp_c++20.cc: New test.
5581         * testsuite/23_containers/stack/cmp_c++20.cc: New test.
5582
5583         * include/bits/unordered_map.h (unordered_map, unordered_multimap):
5584         Remove redundant operator!= for C++20.
5585         * include/bits/unordered_set.h (unordered_set, unordered_multiset):
5586         Likewise.
5587         * include/debug/unordered_map (unordered_map, unordered_multimap):
5588         Likewise.
5589         * include/debug/unordered_set (unordered_set, unordered_multiset):
5590         Likewise.
5591
5592         PR other/94629
5593         * include/debug/formatter.h (_Error_formatter::_Parameter): Fix
5594         redundant assignment in constructor.
5595
5596 2020-04-18  Jonathan Wakely  <jwakely@redhat.com>
5597
5598         * include/std/chrono (duration, time_point): Define operator<=> and
5599         remove redundant operator!= for C++20.
5600         * testsuite/20_util/duration/comparison_operators/three_way.cc: New
5601         test.
5602         * testsuite/20_util/time_point/comparison_operators/three_way.cc: New
5603         test.
5604
5605         * testsuite/util/native_type/native_priority_queue.hpp: Use
5606         allocator_traits to rebind allocator.
5607
5608 2020-04-17  Jonathan Wakely  <jwakely@redhat.com>
5609
5610         * include/bits/forward_list.h (forward_list): Define operator<=> and
5611         remove redundant comparison operators for C++20.
5612         * include/bits/stl_bvector.h (vector<bool, Alloc>): Likewise.
5613         * include/bits/stl_deque.h (deque): Likewise.
5614         * include/bits/stl_iterator.h (__normal_iterator): Likewise.
5615         * include/bits/stl_list.h (list): Likewise.
5616         * include/bits/stl_vector.h (vector): Likewise.
5617         * include/debug/deque (__gnu_debug::deque): Likewise.
5618         * include/debug/forward_list (__gnu_debug::forward_list): Likewise.
5619         * include/debug/list (__gnu_debug::list): Likewise.
5620         * include/debug/safe_iterator.h (__gnu_debug::_Safe_iterator):
5621         Likewise.
5622         * include/debug/vector (__gnu_debug::vector): Likewise.
5623         * include/ext/pointer.h (__gnu_cxx::_Pointer_adapter): Define
5624         operator<=> for C++20.
5625         * testsuite/23_containers/deque/operators/cmp_c++20.cc: New test.
5626         * testsuite/23_containers/forward_list/cmp_c++20.cc: New test.
5627         * testsuite/23_containers/list/cmp_c++20.cc: New test.
5628         * testsuite/23_containers/vector/bool/cmp_c++20.cc: New test.
5629         * testsuite/23_containers/vector/cmp_c++20.cc: New test.
5630
5631         * include/bits/basic_string.h (basic_string): Define operator<=> and
5632         remove redundant comparison operators for C++20.
5633         * include/bits/char_traits.h (__gnu_cxx::char_traits, char_traits):
5634         Add comparison_category members.
5635         (__detail::__char_traits_cmp_cat): New helper to get comparison
5636         category from char traits class.
5637         * include/bits/regex.h (regex_traits::_RegexMask::operator!=): Do not
5638         define for C++20.
5639         (sub_match): Define operator<=> and remove redundant comparison
5640         operators for C++20.
5641         (match_results): Remove redundant operator!= for C++20.
5642         * include/std/string_view (basic_string_view): Define operator<=> and
5643         remove redundant comparison operators for C++20.
5644         * testsuite/21_strings/basic_string/operators/char/cmp_c++20.cc: New
5645         test.
5646         * testsuite/21_strings/basic_string/operators/wchar_t/cmp_c++20.cc:
5647         New test.
5648         * testsuite/21_strings/basic_string_view/operations/copy/char/
5649         constexpr.cc: Initialize variable.
5650         * testsuite/21_strings/basic_string_view/operations/copy/wchar_t/
5651         constexpr.cc: Likewise.
5652         * testsuite/21_strings/basic_string_view/operators/char/2.cc: Add
5653         dg-do directive and remove comments showing incorrect signatures.
5654         * testsuite/21_strings/basic_string_view/operators/wchar_t/2.cc:
5655         Likewise.
5656         * testsuite/21_strings/basic_string_view/operators/char/cmp_c++20.cc:
5657         New test.
5658         * testsuite/21_strings/basic_string_view/operators/wchar_t/cmp_c++20.cc:
5659         New test.
5660         * testsuite/28_regex/sub_match/compare_c++20.cc: New test.
5661
5662 2020-04-16  Jonathan Wakely  <jwakely@redhat.com>
5663
5664         * testsuite/20_util/unsynchronized_pool_resource/allocate.cc: Remove
5665         name of unused parameter.
5666
5667 2020-04-15  Jonathan Wakely  <jwakely@redhat.com>
5668
5669         * include/bits/fs_dir.h (file_status): Define operator== for C++20.
5670         (directory_entry): Define operator<=> and remove redundant comparison
5671         operators for C++20.
5672         * include/bits/fs_fwd.h (space_info): Define operator== for C++20.
5673         * include/bits/fs_path.h (path): Define operator<=> and remove
5674         redundant comparison operators for C++20.
5675         * testsuite/27_io/filesystem/path/compare/compare.cc: Fix comment.
5676         * testsuite/27_io/filesystem/path/compare/lwg2936.cc: Likewise.
5677         * testsuite/27_io/filesystem/path/compare/path.cc: Likewise.
5678         * testsuite/27_io/filesystem/path/compare/strings.cc: Likewise.
5679
5680         * include/bits/allocator.h (operator!=): Do not define for C++20.
5681         * include/bits/locale_classes.h (operator!=): Likewise.
5682         * include/bits/std_function.h (operator==(nullptr_t, const function&))
5683         (operator!=(const function&, nullptr_t))
5684         (operator!=(nullptr_t, const function&)): Likewise.
5685         * include/ext/bitmap_allocator.h (operator!=): Likewise.
5686         * include/ext/debug_allocator.h (operator!=): Likewise.
5687         * include/ext/extptr_allocator.h (operator!=): Likewise.
5688         * include/ext/malloc_allocator.h (operator!=): Likewise.
5689         * include/ext/mt_allocator.h (operator!=): Likewise.
5690         * include/ext/new_allocator.h (operator!=): Likewise.
5691         * include/ext/pool_allocator.h (operator!=): Likewise.
5692         * include/ext/throw_allocator.h (operator!=): Likewise.
5693         * include/std/bitset (bitset::operator!=): Likewise.
5694         * include/std/memory_resource (operator!=): Likewise.
5695         * include/std/scoped_allocator (operator!=): Likewise.
5696
5697         * include/std/typeindex (operator<=>): Define for C++20.
5698         * testsuite/20_util/typeindex/comparison_operators_c++20.cc: New test.
5699
5700 2020-04-14  Jonathan Wakely  <jwakely@redhat.com>
5701
5702         * libsupc++/compare (compare_three_way): Fix constraint so that
5703         BUILTIN-PTR-THREE-WAY does not require three_way_comparable_with.
5704         * testsuite/18_support/comparisons/object/builtin-ptr-three-way.cc:
5705         New test.
5706
5707         PR libstdc++/94562
5708         * include/bits/shared_ptr.h (operator<=>): Define for C++20.
5709         * include/bits/shared_ptr_base.h (operator<=>): Likewise.
5710         * include/bits/unique_ptr.h (operator<=>): Add inline specifier.
5711         * testsuite/20_util/shared_ptr/comparison/cmp_c++20.cc: New test.
5712         * testsuite/20_util/shared_ptr/comparison/less.cc: Do not expect
5713         std::less<A*> to be used when comparing std::shared_ptr<A> objects in
5714         C++20.
5715
5716         PR libstdc++/94565
5717         * libsupc++/compare (__unspec): Add noexcept-specifier to constructor.
5718         * testsuite/18_support/comparisons/categories/94565.cc: New test.
5719
5720 2020-04-13  Iain Sandoe  <iain@sandoe.co.uk>
5721
5722         * include/std/coroutine: Update coroutines builtin define,
5723         per n4861.
5724
5725 2020-04-09  Jonathan Wakely  <jwakely@redhat.com>
5726
5727         * libsupc++/compare (compare_three_way): Fix noexcept-specifier.
5728         (strong_order, weak_order, partial_order): Replace uses of <=> with
5729         compare_three_way function object (LWG 3324).
5730         * testsuite/18_support/comparisons/algorithms/partial_order.cc: Add
5731         equality operator so that X satisfies three_way_comparable.
5732         * testsuite/18_support/comparisons/algorithms/strong_order.cc:
5733         Likewise.
5734         * testsuite/18_support/comparisons/algorithms/weak_order.cc: Likewise.
5735
5736         * include/bits/unique_ptr.h (operator<=>): Define for C++20.
5737         * testsuite/20_util/default_delete/48631_neg.cc: Adjust dg-error line.
5738         * testsuite/20_util/default_delete/void_neg.cc: Likewise.
5739         * testsuite/20_util/unique_ptr/comparison/compare.cc: New test.
5740         * testsuite/20_util/unique_ptr/comparison/compare_c++20.cc: New test.
5741
5742 2020-04-08  Jonathan Wakely  <jwakely@redhat.com>
5743
5744         * include/bits/slice_array.h (operator==(const slice&, const slice&)):
5745         Define for C++20.
5746         * include/std/complex (operator==(const T&, const complex<T>&))
5747         (operator!=(const complex<T>&, const complex<T>&))
5748         (operator!=(const complex<T>&, const T&))
5749         (operator!=(const T&, const complex<T>&)): Do not declare for C++20.
5750         * testsuite/26_numerics/slice/compare.cc: New test.
5751
5752         * include/std/charconv (to_chars_result, from_chars_result): Add
5753         defaulted equality comparisons for C++20.
5754         * testsuite/20_util/from_chars/compare.cc: New test.
5755         * testsuite/20_util/to_chars/compare.cc: New test.
5756
5757 2020-04-07  Jonathan Wakely  <jwakely@redhat.com>
5758
5759         PR libstdc++/94520
5760         * include/std/charconv (__integer_to_chars_result_type)
5761         (__integer_from_chars_result_type): Use __or_ instead of __or_v_ to
5762         allow use in C++14.
5763         * testsuite/20_util/from_chars/1.cc: Run test as C++14 and replace
5764         use of std::string_view with std::string.
5765         * testsuite/20_util/from_chars/2.cc: Likewise.
5766         * testsuite/20_util/to_chars/1.cc: Likewise.
5767         * testsuite/20_util/to_chars/2.cc: Likewise.
5768
5769 2020-04-06  Jonathan Wakely  <jwakely@redhat.com>
5770
5771         PR libstdc++/94498
5772         * include/bits/char_traits.h (__gnu_cxx::char_traits::move): Make it
5773         usable in constant expressions for C++20.
5774         (__gnu_cxx::char_traits::copy, __gnu_cxx::char_traits::assign): Add
5775         _GLIBCXX20_CONSTEXPR.
5776         (std::char_traits<char>, std::char_traits<wchar_t>)
5777         (std::char_traits<char8_t>): Make move, copy and assign usable in
5778         constant expressions for C++20.
5779         (std::char_traits<char16_t>, std::char_traits<char32_t>): Make move
5780         and copy usable in constant expressions for C++20.
5781         * include/std/string_view (basic_string_view::copy): Add
5782         _GLIBCXX20_CONSTEXPR.
5783         * testsuite/21_strings/basic_string_view/operations/copy/char/
5784         constexpr.cc: New test.
5785         * testsuite/21_strings/basic_string_view/operations/copy/wchar_t/
5786         constexpr.cc: New test.
5787
5788 2020-04-05  Gerald Pfeifer  <gerald@pfeifer.com>
5789
5790         * doc/xml/manual/appendix_contributing.xml: Refer to Git
5791         documentation instead of Subversion.  Switch to https.
5792         * doc/html/manual/appendix_contributing.html: Regenerate.
5793
5794 2020-04-03  Jonathan Wakely  <jwakely@redhat.com>
5795
5796         PR libstdc++/93960
5797         * include/bits/ptr_traits.h (__to_address): Add special case for debug
5798         iterators, to avoid dereferenceable check.
5799         * testsuite/20_util/to_address/1_neg.cc: Adjust dg-error line number.
5800         * testsuite/20_util/to_address/debug.cc: New test.
5801
5802 2020-04-01  Andrea Corallo  <andrea.corallo@arm.com>
5803
5804         * testsuite/experimental/net/execution_context/use_service.cc:
5805         Require pthread and gthreads.
5806
5807 2020-04-01  Gerald Pfeifer  <gerald@pfeifer.com>
5808
5809         * doc/xml/manual/appendix_free.xml: Move "free books" list from
5810         fsf.org to gnu.org.
5811         * doc/html/manual/appendix_free.html: Regenerate.
5812
5813 2020-03-31  Ville Voutilainen  <ville.voutilainen@gmail.com>
5814
5815         Library-side tests for parenthesized aggregate init
5816
5817         PR c++/92878
5818         PR c++/92947
5819
5820         * testsuite/20_util/allocator_traits/members/92878_92947.cc: New.
5821         * testsuite/20_util/any/assign/92878_92947.cc: Likewise.
5822         * testsuite/20_util/any/cons/92878_92947.cc: Likewise.
5823         * testsuite/20_util/is_constructible/92878_92947.cc: Likewise.
5824         * testsuite/20_util/optional/assignment/92878_92947.cc: Likewise.
5825         * testsuite/20_util/optional/cons/92878_92947.cc: Likewise.
5826         * testsuite/20_util/pair/cons/92878_92947.cc: Likewise.
5827         * testsuite/20_util/shared_ptr/creation/92878_92947.cc: Likewise.
5828         * testsuite/20_util/specialized_algorithms/construct_at/92878_92947.cc:
5829         Likewise.
5830         * testsuite/20_util/unique_ptr/creation/92878_92947.cc: Likewise.
5831         * testsuite/20_util/uses_allocator/92878_92947.cc: Likewise.
5832         * testsuite/20_util/variant/92878_92947.cc: Likewise.
5833         * testsuite/23_containers/deque/modifiers/emplace/92878_92947.cc:
5834         Likewise.
5835         * testsuite/23_containers/forward_list/modifiers/92878_92947.cc:
5836         Likewise.
5837         * testsuite/23_containers/list/modifiers/emplace/92878_92947.cc:
5838         Likewise.
5839         * testsuite/23_containers/map/modifiers/emplace/92878_92947.cc:
5840         Likewise.
5841         * testsuite/23_containers/multimap/modifiers/emplace/92878_92947.cc:
5842         Likewise.
5843         * testsuite/23_containers/multiset/modifiers/emplace/92878_92947.cc:
5844         Likewise.
5845         * testsuite/23_containers/priority_queue/92878_92947.cc: Likewise.
5846         * testsuite/23_containers/queue/92878_92947.cc: Likewise.
5847         * testsuite/23_containers/set/modifiers/emplace/92878_92947.cc:
5848         Likewise.
5849         * testsuite/23_containers/stack/92878_92947.cc: Likewise.
5850         * testsuite/23_containers/unordered_map/modifiers/92878_92947.cc:
5851         Likewise.
5852         * testsuite/23_containers/unordered_multimap/modifiers/92878_92947.cc:
5853         Likewise.
5854         * testsuite/23_containers/unordered_multiset/modifiers/92878_92947.cc:
5855         Likewise.
5856         * testsuite/23_containers/unordered_set/modifiers/92878_92947.cc:
5857         Likewise.
5858         * testsuite/23_containers/vector/modifiers/emplace/92878_92947.cc:
5859         Likewise.
5860
5861 2020-03-28  Jonathan Wakely  <jwakely@redhat.com>
5862
5863         * testsuite/20_util/is_constructible/value-2.cc: Fix test to account
5864         for changes due to parenthesized aggregate-initialization in C++20.
5865         * testsuite/20_util/time_point/cons/81468.cc: Fix test to not clash
5866         with std::chrono::sys_time in C++20.
5867
5868         * include/bits/stl_iterator.h (reverse_iterator): Use requires-clause
5869         to constrain C++20 versions of comparison operators. Fix backwards
5870         logic of relational operators.
5871         (move_iterator): Use requires-clause to constrain comparison operators
5872         in C++20. Do not declare non-standard same-type overloads for C++20.
5873         * testsuite/24_iterators/move_iterator/rel_ops_c++20.cc: Check result
5874         of comparisons and check using greedy_ops type.
5875         * testsuite/24_iterators/reverse_iterator/rel_ops_c++20.cc: Likewise.
5876         * testsuite/24_iterators/move_iterator/greedy_ops.cc: Remove redundant
5877         main function from compile-only test.
5878         * testsuite/24_iterators/reverse_iterator/greedy_ops.cc: Likewise.
5879
5880 2020-03-27  Jonathan Wakely  <jwakely@redhat.com>
5881
5882         * include/bits/range_cmp.h (__cpp_lib_ranges): Define.
5883         * include/bits/stl_iterator.h: Check value of __cpp_concepts so that
5884         C++20 concepts are required.
5885         * include/bits/stl_iterator_base_types.h: Likewise.
5886         * include/std/concepts: Likewise.
5887         * include/std/version: Likewise.
5888         * testsuite/std/ranges/headers/ranges/synopsis.cc: Check feature test
5889         macro.
5890
5891         * include/bits/stl_iterator.h (reverse_iterator::iterator_concept)
5892         (reverse_iterator::iterator_category): Define for C++20.
5893         (reverse_iterator): Define comparison operators correctly for C++20.
5894         (__normal_iterator): Add constraints to comparison operators for C++20.
5895         (move_iterator::operator++(int)) [__cpp_lib_concepts]: Define new
5896         overload for input iterators.
5897         (move_iterator): Add constraints to comparison operators for C++20.
5898         Define operator<=> for C++20.
5899         * testsuite/24_iterators/move_iterator/input_iterator.cc: New test.
5900         * testsuite/24_iterators/move_iterator/move_only.cc: New test.
5901         * testsuite/24_iterators/move_iterator/rel_ops_c++20.cc: New test.
5902         * testsuite/24_iterators/reverse_iterator/rel_ops_c++20.cc: New test.
5903
5904         * include/bits/iterator_concepts.h (__detail::__decay_copy)
5905         (__detail::__member_begin, __detail::__adl_begin): Move here from
5906         <bits/range_access.h>.
5907         (__detail::__ranges_begin, __detail::__range_iter_t): Define.
5908         * bits/range_access.h (__cust_access::__decay_copy)
5909         (__cust_access::__member_begin, __cust_access::__adl_begin): Move to
5910         <bits/iterator_concepts.h>.
5911         (ranges::iterator_t): Use __detail::__range_iter_t.
5912         * include/bits/stl_iterator.h (back_insert_iterator): Simplify
5913         conditional compilation. Add _GLIBCXX20_CONSTEXPR to all members.
5914         (front_insert_iterator): Likewise.
5915         (insert_iterator): Implement changes from P0896R4 for C++20.
5916         * testsuite/24_iterators/back_insert_iterator/constexpr.cc: New test.
5917         * testsuite/24_iterators/front_insert_iterator/constexpr.cc: New test.
5918         * testsuite/24_iterators/headers/iterator/synopsis_c++17.cc: Adjust
5919         for inclusion in synopsis_c++20.cc which expects different signatures
5920         for some function templates.
5921         * testsuite/24_iterators/insert_iterator/constexpr.cc: New test.
5922
5923         * include/std/type_traits (__is_array_convertible): Move definition
5924         to immediately after is_convertible.
5925
5926 2020-03-26  Jonathan Wakely  <jwakely@redhat.com>
5927
5928         * include/std/chrono (chrono::days, chrono::weeks, chrono::years)
5929         (chrono::months, chrono::sys_days, chrono::local_t)
5930         (chrono::local_time, chrono::local_seconds, chrono::local_days):
5931         Define for C++20.
5932         (chrono::time_point): Add missing static assert.
5933         * testsuite/20_util/time_point/requirements/duration_neg.cc: New test.
5934         * testsuite/std/time/clock/file/overview.cc: New test.
5935         * testsuite/std/time/clock/file/members.cc: New test.
5936         * testsuite/std/time/syn_c++20.cc: New test.
5937
5938 2020-03-25  Mike Crowe  <mac@mcrowe.com>
5939
5940         * testsuite/30_threads/shared_timed_mutex/try_lock_until/1.cc: New
5941         test.
5942         * testsuite/30_threads/shared_timed_mutex/try_lock_until/2.cc: New
5943         test.
5944
5945 2020-03-25  Jonathan Wakely  <jwakely@redhat.com>
5946
5947         * include/bits/fs_fwd.h (filesystem::__file_clock): Move to ...
5948         * include/std/chrono (filesystem::__file_clock): Here.
5949         (filesystem::__file_clock::from_sys, filesystem::__file_clock::to_sys):
5950         Define public member functions for C++20.
5951         (is_clock, is_clock_v): Define traits for C++20.
5952         * include/std/condition_variable (condition_variable::wait_until): Add
5953         check for valid clock.
5954         * include/std/future (_State_baseV2::wait_until): Likewise.
5955         * include/std/mutex (__timed_mutex_impl::_M_try_lock_until): Likewise.
5956         * include/std/shared_mutex (shared_timed_mutex::try_lock_shared_until):
5957         Likewise.
5958         * include/std/thread (this_thread::sleep_until): Likewise.
5959         * testsuite/30_threads/condition_variable/members/2.cc: Qualify
5960         slow_clock with new namespace.
5961         * testsuite/30_threads/condition_variable/members/clock_neg.cc: New
5962         test.
5963         * testsuite/30_threads/condition_variable_any/members/clock_neg.cc:
5964         New test.
5965         * testsuite/30_threads/future/members/clock_neg.cc: New test.
5966         * testsuite/30_threads/recursive_timed_mutex/try_lock_until/3.cc:
5967         Qualify slow_clock with new namespace.
5968         * testsuite/30_threads/recursive_timed_mutex/try_lock_until/
5969         clock_neg.cc: New test.
5970         * testsuite/30_threads/shared_future/members/clock_neg.cc: New
5971         test.
5972         * testsuite/30_threads/shared_lock/locking/clock_neg.cc: New test.
5973         * testsuite/30_threads/shared_timed_mutex/try_lock_until/clock_neg.cc:
5974         New test.
5975         * testsuite/30_threads/timed_mutex/try_lock_until/3.cc: Qualify
5976         slow_clock with new namespace.
5977         * testsuite/30_threads/timed_mutex/try_lock_until/4.cc: Likewise.
5978         * testsuite/30_threads/timed_mutex/try_lock_until/clock_neg.cc: New
5979         test.
5980         * testsuite/30_threads/unique_lock/locking/clock_neg.cc: New test.
5981         * testsuite/std/time/traits/is_clock.cc: New test.
5982         * testsuite/util/slow_clock.h (slow_clock): Move to __gnu_test
5983         namespace.
5984
5985 2020-03-21  Jonathan Wakely  <jwakely@redhat.com>
5986
5987         PR libstdc++/93245
5988         * include/experimental/bits/fs_path.h (path::generic_string<C,T,A>()):
5989         * testsuite/experimental/filesystem/path/generic/generic_string.cc:
5990         Improve test coverage.
5991
5992         PR libstdc++/94242
5993         * include/bits/fs_path.h (path::_S_str_convert): Replace first
5994         parameter with basic_string_view so that strings with different
5995         allocators can be accepted.
5996         (path::generic_string<C,T,A>()): Use basic_string object that uses the
5997         right allocator type.
5998         * testsuite/27_io/filesystem/path/generic/94242.cc: New test.
5999         * testsuite/27_io/filesystem/path/generic/generic_string.cc: Improve
6000         test coverage.
6001
6002 2020-03-18  Jonathan Wakely  <jwakely@redhat.com>
6003
6004         PR libstdc++/94033
6005         * include/std/type_traits (__is_nt_default_constructible_atom): Remove.
6006         (__is_nt_default_constructible_impl): Remove.
6007         (__is_nothrow_default_constructible_impl): Remove.
6008         (__is_nt_constructible_impl): Add bool template parameter. Adjust
6009         partial specializations.
6010         (__is_nothrow_constructible_impl): Replace class template with alias
6011         template.
6012         (is_nothrow_default_constructible): Derive from alias template
6013         __is_nothrow_constructible_impl instead of
6014         __is_nothrow_default_constructible_impl.
6015         * testsuite/20_util/is_nothrow_constructible/94003.cc: New test.
6016
6017         * include/std/stop_token (stop_token::_Stop_state_ref): Define
6018         comparison operators explicitly if the compiler won't synthesize them.
6019
6020         * include/bits/stl_algobase.h (__lexicographical_compare_aux): Check
6021         __cpp_lib_concepts before using iter_reference_t.
6022         * include/bits/stream_iterator.h (istream_iterator): Check
6023         __cpp_lib_concepts before using default_sentinel_t.
6024         * include/bits/streambuf_iterator.h (istreambuf_iterator): Likewise.
6025
6026         PR libstdc++/94203
6027         * include/experimental/executor (executor::executor(Executor)): Call
6028         make_shared directly instead of _M_create. Create _Tgt1 object.
6029         (executor::executor(allocator_arg_t, const ProtoAlloc&, Executor)):
6030         Call allocate_shared directly instead of _M_create. Create _Tgt2
6031         object.
6032         (executor::target_type): Add cast needed for new _Tgt interface.
6033         (executor::target): Define when RTTI is disabled. Use _Tgt::_M_func.
6034         (executor::_Tgt): Define the same interface whether RTTI is enabled or
6035         not.
6036         (executor::_Tgt::target_type, executor::_Tgt::target): Do not use
6037         std::type_info in the interface.
6038         (executor::_Tgt::_M_func): Add data member.
6039         (executor::_TgtImpl): Replace with _Tgt1 and _Tgt2 class templates.
6040         (executor::_Tgt1::_S_func): Define function to access target without
6041         depending on RTTI.
6042         (executor::_M_create): Remove.
6043         (operator==, operator!=): Simplify comparisons for executor.
6044         * include/experimental/socket (is_error_code_enum<socket_errc>):
6045         Define specialization before use.
6046         * testsuite/experimental/net/executor/1.cc: New test.
6047
6048 2020-03-16  Jonathan Wakely  <jwakely@redhat.com>
6049
6050         PR libstdc++/94199
6051         * include/experimental/executor (service_already_exists): Add default
6052         constructor. Declare make_service to be a friend.
6053         * testsuite/experimental/net/execution_context/make_service.cc: New
6054         test.
6055
6056 2020-03-12  Jonathan Wakely  <jwakely@redhat.com>
6057
6058         * testsuite/tr1/8_c_compatibility/cstdlib/functions.cc: Do not pass
6059         a null pointer to functions with nonnull(1) attribute.
6060
6061 2020-03-11  Patrick Palka  <ppalka@redhat.com>
6062
6063         * include/std/ranges (split_view::_OuterIter::_OuterIter): Typo fix,
6064         'address' -> 'std::__addressof'.
6065         * testsuite/std/ranges/adaptors/split.cc: Test taking the split_view of
6066         a non-forward input_range.
6067         * testsuite/util/testsuite_iterators.h (output_iterator_wrapper): Make
6068         default constructor protected instead of deleted, like with
6069         input_iterator_wrapper.
6070         (test_range::iterator): Add comment explaining that this type is used
6071         only when the underlying wrapper is input_iterator_wrapper or
6072         output_iterator_wrapper.  Remove delegating defaulted constructor so
6073         that the inherited default constructor is used instead.
6074
6075         LWG 3286 ranges::size is not required to be valid after a call to
6076         ranges::begin on an input range
6077         * include/std/ranges (subrange::subrange): Split single-argument
6078         constructor into two, one constrained by _S_store_size and another by
6079         !_S_store_size.
6080         (take_view::begin): Call size() before calling ranges::begin(_M_base).
6081         * testsuite/std/ranges/adaptors/lwg3286.cc: New test.
6082         * testsuite/std/ranges/subrange/lwg3286.cc: New test.
6083
6084 2020-03-10  Jonathan Wakely  <jwakely@redhat.com>
6085
6086         * include/std/ranges (split_view::_OuterIter::__at_end): Use __current
6087         instead of _M_current.
6088         (split_view::_OuterIter::operator++): Likewise.
6089
6090         * include/std/ranges (transform_view::_Iterator::__iter_move): Remove.
6091         (transform_view::_Iterator::operator*): Add noexcept-specifier.
6092         (transform_view::_Iterator::iter_move): Inline __iter_move body here.
6093         (split_view::_OuterIter::__current): Add noexcept.
6094         (split_view::_InnerIter::__iter_swap): Remove.
6095         (split_view::_InnerIter::__iter_move): Remove.
6096         (split_view::_InnerIter::_M_i_current): New accessors.
6097         (split_view::_InnerIter::__at_end): Use _M_i_current().
6098         (split_view::_InnerIter::operator*): Likewise.
6099         (split_view::_InnerIter::operator++): Likewise.
6100         (iter_move(const _InnerIter&)): Likewise.
6101         (iter_swap(const _InnerIter&, const _InnerIter&)): Likewise.
6102         * testsuite/std/ranges/adaptors/split.cc: Check noexcept-specifier
6103         for iter_move and iter_swap on split_view's inner iterator.
6104
6105         PR c++/94117
6106         * include/std/ranges (ranges::transform_view::_Iterator::iter_move):
6107         Change expression in noexcept-specifier to match function body.
6108
6109         * testsuite/23_containers/unordered_set/allocator/ext_ptr.cc: Add
6110         comment explaining multiple dg-do directives.
6111         * testsuite/24_iterators/ostream_iterator/1.cc: Fix do-do directive
6112         so test is run as well as compiled.
6113
6114 2020-03-09  Jonathan Wakely  <jwakely@redhat.com>
6115
6116         PR libstdc++/94063
6117         * src/c++17/fs_path.cc (path::operator+=(const path&)): Add kluge to
6118         handle concatenations that change the type of the first component.
6119         (path::operator+=(basic_string_view<value_type>)): Likewise.
6120         * testsuite/27_io/filesystem/path/concat/94063.cc: New test.
6121
6122 2020-03-06  Patrick Palka  <ppalka@redhat.com>
6123
6124         * include/std/ranges (join_view::_Sentinel<_Const>): Befriend
6125         join_view::_Sentinel<!_Const>.
6126         * testsuite/std/ranges/adaptors/join.cc: Augment test.
6127
6128         PR libstdc++/93978
6129         * include/bits/range_access.h (__cust_access::_Empty::operator()):
6130         Declare return type to be bool instead of auto.
6131         * testsuite/std/ranges/adaptors/93978.cc: New test.
6132
6133 2020-03-06  Jonathan Wakely  <jwakely@redhat.com>
6134
6135         PR libstdc++/94069
6136         * include/std/shared_mutex [!PTHREAD_RWLOCK_INITIALIZER]
6137         (__shared_mutex_pthread::__shared_mutex_pthread()): Remove incorrect
6138         second argument to __glibcxx_rwlock_init.
6139         * testsuite/30_threads/shared_timed_mutex/94069.cc: New test.
6140
6141         PR libstdc++/93244
6142         * testsuite/27_io/filesystem/path/generic/generic_string.cc: Adjust
6143         test to not fail due to PR 94063.
6144         * testsuite/27_io/filesystem/path/generic/utf.cc: Likewise.
6145         * testsuite/27_io/filesystem/path/generic/wchar_t.cc: Likewise.
6146
6147 2020-03-06  Andreas Krebbel  <krebbel@linux.ibm.com>
6148
6149         * src/c++11/system_error.cc: Omit the ENOTSUP case statement if it
6150         would match ENOSYS.
6151
6152 2020-03-05  Jonathan Wakely  <jwakely@redhat.com>
6153
6154         * testsuite/27_io/filesystem/operations/all.cc: Mark unused variable.
6155         * testsuite/27_io/filesystem/operations/copy.cc: Fix typo.
6156         * testsuite/experimental/filesystem/operations/copy.cc: Likewise.
6157         * testsuite/27_io/filesystem/operations/file_size.cc: Use correct type
6158         for return value, and in comparison.
6159         * testsuite/experimental/filesystem/operations/file_size.cc: Likewise.
6160
6161         PR libstdc++/94051
6162         * include/std/string_view: Include <bits/ostream_insert.h>.
6163         * testsuite/21_strings/basic_string_view/inserters/94051.cc: New test.
6164
6165 2020-03-04  Jonathan Wakely  <jwakely@redhat.com>
6166
6167         * include/bits/cpp_type_traits.h (__memcpyable): Fix comment.
6168
6169 2020-03-04  Patrick Palka  <ppalka@redhat.com>
6170
6171         PR libstdc++/94017
6172         * include/bits/ranges_algobase.h (__fill_n_fn::operator()): Refine
6173         condition for when to use memset, making sure to additionally check that
6174         the output pointer's value type is a non-volatile byte type.  Instead of
6175         requiring that the fill type is a byte type, just require that it's an
6176         integral type.
6177         * testsuite/20_util/specialized_algorithms/uninitialized_fill/94017.cc:
6178         New test.
6179         * testsuite/20_util/specialized_algorithms/uninitialized_fill_n/94017.cc:
6180         New test.
6181         * testsuite/25_algorithms/fill/94013.cc: Uncomment part of test that was
6182         blocked by PR 94017.
6183         * testsuite/25_algorithms/fill/94017.cc: New test.
6184         * testsuite/25_algorithms/fill_n/94017.cc: New test.
6185
6186         LWG 3355 The memory algorithms should support move-only input iterators
6187         introduced by P1207
6188         * include/bits/ranges_uninitialized.h
6189         (__uninitialized_copy_fn::operator()): Use std::move to avoid attempting
6190         to copy __ifirst, which could be a move-only input iterator.  Use
6191         operator- instead of ranges::distance to compute distance from a sized
6192         sentinel.
6193         (__uninitialized_copy_n_fn::operator()): Likewise.
6194         (__uninitialized_move_fn::operator()): Likewise.
6195         (__uninitialized_move_n_fn::operator()): Likewise.
6196         (__uninitialized_destroy_fn::operator()): Use std::move to avoid
6197         attempting to copy __first.
6198         (__uninitialized_destroy_n_fn::operator()): Likewise.
6199         * testsuite/20_util/specialized_algorithms/destroy/constrained.cc:
6200         Augment test.
6201         * .../specialized_algorithms/uninitialized_copy/constrained.cc:
6202         Likewise.
6203         * .../specialized_algorithms/uninitialized_move/constrained.cc:
6204         Likewise.
6205
6206         * testsuite/util/testsuite_iterators.h (test_range::get_iterator): Make
6207         protected instead of private.
6208         (test_sized_range_sized_sent): New.
6209
6210         * testsuite/util/testsuite_iterators.h (input_iterator_wrapper_nocopy):
6211         New testsuite iterator.
6212         * testsuite/24_iterators/counted_iterator/lwg3389.cc: use it.
6213         * testsuite/24_iterators/move_iterator/lwg3390.cc: Likewise.
6214
6215         * include/bits/ranges_uninitialized.h
6216         (uninitialized_copy_fn::operator()): Pass a reference type as the first
6217         argument to is_nothrow_assignable_v.
6218         (uninitialized_copy_fn::operator()): Likewise.
6219         (uninitialized_move_fn::operator()): Likewise.  Return an in_out_result
6220         with the input iterator stripped of its move_iterator.
6221         (uninitialized_move_n_fn::operator()): Likewise.
6222         (uninitialized_fill_fn::operator()): Pass a reference type as the first
6223         argument to is_nothrow_assignable_v.
6224         (uninitialized_fill_n_fn::operator()): Likewise.
6225
6226 2020-03-03  Jonathan Wakely  <jwakely@redhat.com>
6227
6228         PR libstdc++/94013
6229         * include/bits/cpp_type_traits.h (__memcpyable, __memcmpable): New
6230         traits to control when to use memmove and memcmp optimizations.
6231         (__is_nonvolatile_trivially_copyable): New helper trait.
6232         * include/bits/ranges_algo.h (__lexicographical_compare_fn): Do not
6233         use memcmp optimization with volatile data.
6234         * include/bits/ranges_algobase.h (__equal_fn): Use __memcmpable.
6235         (__copy_or_move, __copy_or_move_backward): Use __memcpyable.
6236         * include/bits/stl_algobase.h (__copy_move_a2): Use __memcpyable.
6237         (__copy_move_backward_a2): Likewise.
6238         (__equal_aux1): Use __memcmpable.
6239         (__lexicographical_compare_aux): Do not use memcmp optimization with
6240         volatile data.
6241         * testsuite/25_algorithms/copy/94013.cc: New test.
6242         * testsuite/25_algorithms/copy_backward/94013.cc: New test.
6243         * testsuite/25_algorithms/equal/94013.cc: New test.
6244         * testsuite/25_algorithms/fill/94013.cc: New test.
6245         * testsuite/25_algorithms/lexicographical_compare/94013.cc: New test.
6246         * testsuite/25_algorithms/move/94013.cc: New test.
6247         * testsuite/25_algorithms/move_backward/94013.cc: New test.
6248
6249         * include/bits/stl_algobase.h (lexicographical_compare_three_way):
6250         Avoid redundant iterator comparisons (LWG 3410).
6251
6252 2020-03-02  Jonathan Wakely  <jwakely@redhat.com>
6253
6254         PR libstdc++/93972
6255         * include/bits/stl_algobase.h (__memcmp): Allow pointer types to
6256         differ.
6257         * testsuite/25_algorithms/lexicographical_compare/uchar.cc: New test.
6258
6259         * include/std/ranges (__detail::__maybe_empty_t): Rename to
6260         __maybe_present_t.
6261         (__adaptor::_RangeAdaptor, join_view, split_view): Use new name.
6262
6263         * include/bits/ranges_algo.h (shift_right): Add 'typename' to
6264         dependent type.
6265
6266 2020-03-01  H.J. Lu  <hongjiu.lu@intel.com>
6267
6268         * config/abi/post/x86_64-linux-gnu/x32/baseline_symbols.txt: Updated.
6269
6270 2020-02-29  John David Anglin  <danglin@gcc.gnu.org>
6271
6272         * testsuite/17_intro/headers/c++1998/charset.cc: Skip on *-*-hpux*.
6273         * testsuite/17_intro/headers/c++2011/charset.cc: Likewise.
6274         * testsuite/17_intro/headers/c++2014/charset.cc: Likewise.
6275         * testsuite/17_intro/headers/c++2017/charset.cc: Likewise.
6276         * testsuite/17_intro/headers/c++2020/charset.cc: Likewise.
6277
6278         * testsuite/30_threads/condition_variable_any/stop_token/wait_on.cc:
6279         Add libatomic option.
6280         * testsuite/30_threads/jthread/jthread.cc: Likewise.
6281
6282 2020-02-29  François Dumont  <fdumont@gcc.gnu.org>
6283
6284         * include/bits/stl_algo.h
6285         (__find_if, __count_if, __is_permutation, std::is_permutation): Move...
6286         * include/bits/stl_algobase.h: ...here.
6287         * include/bits/hashtable_policy.h: Remove <bits/stl_algo.h> include.
6288
6289 2020-02-29  John David Anglin  <danglin@gcc.gnu.org>
6290
6291         * testsuite/30_threads/stop_token/stop_callback.cc: Add libatomic
6292         option.
6293         * testsuite/30_threads/stop_token/stop_callback/deadlock-mt.cc:
6294         Likewise.
6295         * testsuite/30_threads/stop_token/stop_callback/deadlock.cc: Likewise.
6296         * testsuite/30_threads/stop_token/stop_callback/destroy.cc: Likewise.
6297         * testsuite/30_threads/stop_token/stop_callback/invoke.cc: Likewise.
6298         * testsuite/30_threads/stop_token/stop_source.cc: Likewise.
6299         * testsuite/30_threads/stop_token/stop_source/assign.cc: Likewise.
6300         * testsuite/30_threads/stop_token/stop_token.cc: Likewise.
6301         * testsuite/30_threads/stop_token/stop_token/stop_possible.cc:
6302         Likewise.
6303
6304         PR libstdc++/92906
6305         * config/abi/post/hppa-linux-gnu/baseline_symbols.txt: Update.
6306
6307 2020-02-28  Patrick Palka  <ppalka@redhat.com>
6308
6309         PR libstdc++/93972
6310         * include/bits/ranges_algo.h (__lexicographical_compare_fn::operator()):
6311         Fix condition for when to use memcmp, making it consistent with the
6312         corresponding condition used in std::lexicographical_compare.
6313         * testsuite/25_algorithms/lexicographical_compare/93972.cc: New test.
6314
6315         * testsuite/26_numerics/headers/numeric/synopsis.cc: Add signatures for
6316         functions introduced in C++11, C++17 and C++2a.  Add 'constexpr' to
6317         existing signatures for C++2a.
6318
6319 2020-02-28  Jonathan Wakely  <jwakely@redhat.com>
6320
6321         * testsuite/24_iterators/range_operations/advance_debug_neg.cc: Run
6322         test instead of just compiling it.
6323
6324 2020-02-28  Patrick Palka  <ppalka@redhat.com>
6325
6326         * include/std/ranges (reverse_view::_S_needs_cached_begin): Set to false
6327         whenever the underlying range models common_range.
6328
6329         * include/std/ranges (__detail::_CachedPosition): New struct.
6330         (views::filter_view::_S_needs_cached_begin): New member variable.
6331         (views::filter_view::_M_cached_begin): New member variable.
6332         (views::filter_view::begin): Use _M_cached_begin to cache its
6333         result.
6334         (views::drop_view::_S_needs_cached_begin): New static member variable.
6335         (views::drop_view::_M_cached_begin): New member variable.
6336         (views::drop_view::begin): Use _M_cached_begin to cache its result
6337         when _S_needs_cached_begin.
6338         (views::drop_while_view::_M_cached_begin): New member variable.
6339         (views::drop_while_view::begin): Use _M_cached_begin to cache its
6340         result.
6341         (views::reverse_view::_S_needs_cached_begin): New static member
6342         variable.
6343         (views::reverse_view::_M_cached_begin): New member variable.
6344         (views::reverse_view::begin): Use _M_cached_begin to cache its result
6345         when _S_needs_cached_begin.
6346         * testsuite/std/ranges/adaptors/drop.cc: Augment test to check that
6347         drop_view::begin caches its result.
6348         * testsuite/std/ranges/adaptors/drop_while.cc: Augment test to check
6349         that drop_while_view::begin caches its result.
6350         * testsuite/std/ranges/adaptors/filter.cc: Augment test to check that
6351         filter_view::begin caches its result.
6352         * testsuite/std/ranges/adaptors/reverse.cc: Augment test to check that
6353         reverse_view::begin caches its result.
6354
6355 2020-02-28  Jonathan Wakely  <jwakely@redhat.com>
6356
6357         * testsuite/27_io/filesystem/operations/last_write_time.cc: Fixes for
6358         filesystems that silently truncate timestamps.
6359         * testsuite/experimental/filesystem/operations/last_write_time.cc:
6360         Likewise.
6361
6362         * testsuite/21_strings/basic_string/cons/char/1.cc: Disable
6363         -Wstringop-overflow warnings.
6364
6365 2020-02-27  Jonathan Wakely  <jwakely@redhat.com>
6366
6367         * testsuite/lib/libstdc++.exp (v3_target_compile): Add
6368         -fdiagnostics-urls=never to options.
6369
6370 2020-02-27  Patrick Palka  <ppalka@redhat.com>
6371
6372         * include/std/ranges (transform_view::_Iterator<_Const>): Befriend
6373         _Iterator<!_Const>.
6374         (transform_view::_Sentinel<_Const>): Befriend _Sentinel<!_Const>.
6375         (take_view::_Sentinel<_Const>): Likewise.
6376         (take_while_view::_Sentinel<_Const>): Likewise.
6377         (split_view::_OuterIter<_Const>): Befriend _OuterIter<!_Const>.
6378         * testsuite/std/ranges/adaptors/split.cc: Augment test.
6379         * testsuite/std/ranges/adaptors/take.cc: Augment test.
6380         * testsuite/std/ranges/adaptors/take_while.cc: Augment test.
6381         * testsuite/std/ranges/adaptors/transform.cc: Augment test.
6382
6383         * testsuite/25_algorithms/copy/constrained.cc: Don't assume that the
6384         base() of a vector<>::iterator is a pointer.
6385         * testsuite/25_algorithms/copy_backward/constrained.cc: Likewise.
6386         * testsuite/25_algorithms/move/constrained.cc: Likewise.
6387         * testsuite/25_algorithms/move_backward/constrained.cc: Likewise.
6388         * testsuite/25_algorithms/inplace_merge/constrained.cc: Use foo.data()
6389         instead of &foo[0].
6390         * testsuite/25_algorithms/partial_sort/constrained.cc: Likewise.
6391         * testsuite/25_algorithms/partial_sort_copy/constrained.cc: Likewise.
6392         * testsuite/25_algorithms/shuffle/constrained.cc: Likewise.
6393         * testsuite/25_algorithms/sort/constrained.cc: Likewise.
6394         * testsuite/25_algorithms/stable_sort/constrained.cc: Likewise.
6395
6396 2020-02-27  Jonathan Wakely  <jwakely@redhat.com>
6397
6398         * include/debug/array (operator<=>): Define for C++20.
6399         * testsuite/23_containers/array/tuple_interface/get_debug_neg.cc:
6400         Adjust dg-error line numbers.
6401         * testsuite/23_containers/array/tuple_interface/
6402         tuple_element_debug_neg.cc: Likewise.
6403
6404         * testsuite/23_containers/span/back_assert_neg.cc: Add #undef before
6405         defining _GLIBCXX_ASSERTIONS.
6406         * testsuite/23_containers/span/first_2_assert_neg.cc: Likewise.
6407         * testsuite/23_containers/span/first_assert_neg.cc: Likewise.
6408         * testsuite/23_containers/span/front_assert_neg.cc: Likewise.
6409         * testsuite/23_containers/span/index_op_assert_neg.cc: Likewise.
6410         * testsuite/23_containers/span/last_2_assert_neg.cc: Likewise.
6411         * testsuite/23_containers/span/last_assert_neg.cc: Likewise.
6412         * testsuite/23_containers/span/subspan_2_assert_neg.cc: Likewise.
6413         * testsuite/23_containers/span/subspan_3_assert_neg.cc: Likewise.
6414         * testsuite/23_containers/span/subspan_4_assert_neg.cc: Likewise.
6415         * testsuite/23_containers/span/subspan_5_assert_neg.cc: Likewise.
6416         * testsuite/23_containers/span/subspan_6_assert_neg.cc: Likewise.
6417         * testsuite/23_containers/span/subspan_assert_neg.cc: Likewise.
6418
6419         * include/debug/string (__gnu_debug::basic_string::insert): Fix for
6420         C++98 where the member function of the base class returns void.
6421
6422         * testsuite/util/testsuite_iterators.h (forward_iterator_wrapper): Add
6423         equality comparisons that support value-initialized iterators.
6424
6425         * include/bits/boost_concept_check.h (__function_requires): Add
6426         _GLIBCXX14_CONSTEXPR.
6427         * testsuite/25_algorithms/min/concept_checks.cc: New test.
6428
6429 2020-02-26  Patrick Palka  <ppalka@redhat.com>
6430
6431         PR libstdc++/93936
6432         * include/std/ranges (split_view::_InnerIter::operator==): Compare
6433         the operands' _M_i rather than their _M_i.current().
6434         * testsuite/std/ranges/adaptors/split.cc: Augment test.
6435
6436         P1645R1 constexpr for <numeric> algorithms
6437         * include/bits/stl_numeric.h (iota, accumulate, inner_product,
6438         partial_sum, adjacent_difference): Make conditionally constexpr for
6439         C++20.
6440         * include/std/numeric (__cpp_lib_constexpr_numeric): Define this feature
6441         test macro.
6442         (reduce, transform_reduce, exclusive_scan, inclusive_scan,
6443         transform_exclusive_scan, transform_inclusive_scan): Make conditionally
6444         constexpr for C++20.
6445         * include/std/version (__cpp_lib_constexpr_numeric): Define.
6446         * testsuite/26_numerics/accumulate/constexpr.cc: New test.
6447         * testsuite/26_numerics/adjacent_difference/constexpr.cc: Likewise.
6448         * testsuite/26_numerics/exclusive_scan/constexpr.cc: Likewise.
6449         * testsuite/26_numerics/inclusive_scan/constexpr.cc: Likewise.
6450         * testsuite/26_numerics/inner_product/constexpr.cc: Likewise.
6451         * testsuite/26_numerics/iota/constexpr.cc: Likewise.
6452         * testsuite/26_numerics/partial_sum/constexpr.cc: Likewise.
6453         * testsuite/26_numerics/reduce/constexpr.cc: Likewise.
6454         * testsuite/26_numerics/transform_exclusive_scan/constexpr.cc: Likewise.
6455         * testsuite/26_numerics/transform_inclusive_scan/constexpr.cc: Likewise.
6456         * testsuite/26_numerics/transform_reduce/constexpr.cc: Likewise.
6457
6458 2020-02-26  Jonathan Wakely  <jwakely@redhat.com>
6459
6460         * include/bits/ranges_algo.h (__lexicographical_compare_fn): Declare
6461         variables in smaller scope and avoid calling ranges::distance when we
6462         know they are pointers. Remove statically-unreachable use of
6463         __builtin_unreachable().
6464         * include/bits/stl_algobase.h (__lexicographical_compare::__lc):
6465         Define inline.
6466
6467         * include/std/ranges (__detail::__maybe_empty_t): Define new helper
6468         alias.
6469         (__detail::__maybe_const_t): Likewise.
6470         (__adaptor::_RangeAdaptor): Use __maybe_empty_t.
6471         (transform_view, take_view, take_while_view, elements_view): Use
6472         __maybe_const_t.
6473         (join_view, split_view): Use both.
6474
6475 2020-02-25  Patrick Palka  <ppalka@redhat.com>
6476
6477         LWG 3397 basic_istream_view::iterator should not provide
6478         iterator_category
6479         * include/std/ranges (basic_istream_view:_Iterator::iterator_category):
6480         Rename to ...
6481         (basic_istream_view:_Iterator::iterator_concept): ... this.
6482         * testsuite/std/ranges/istream_view.cc: Augment test.
6483
6484         LWG 3325 Constrain return type of transformation function for
6485         transform_view
6486         * include/std/ranges (transform_view): Constrain the return type of the
6487         transformation function as per LWG 3325.
6488         * testsuite/std/ranges/adaptors/lwg3325_neg.cc: New test.
6489
6490         LWG 3313 join_view::_Iterator::operator-- is incorrectly constrained
6491         * include/std/ranges (join_view::_Iterator::operator--): Require that
6492         range_reference_t<_Base> models common_range.
6493         * testsuite/std/ranges/adaptors/lwg3313_neg.cc: New test.
6494
6495         LWG 3301 transform_view::_Iterator has incorrect iterator_category
6496         * include/std/ranges (transform_view::_Iterator::_S_iter_cat): Adjust
6497         determination of iterator_category as per LWG 3301.
6498         * testsuite/std/ranges/adaptors/transform.cc: Augment test.
6499
6500         LWG 3292 iota_view is under-constrained
6501         * include/std/ranges (iota_view): Require that _Winc models semiregular
6502           as per LWG 3292.
6503         * testsuite/std/ranges/iota/lwg3292_neg.cc: New test.
6504
6505 2020-02-25  Jonathan Wakely  <jwakely@redhat.com>
6506
6507         * include/bits/ranges_algobase.h (__copy_or_move): Do not use memmove
6508         during constant evaluation. Call __builtin_memmove directly instead of
6509         __memmove.
6510         (__copy_or_move_backward): Likewise.
6511         * include/bits/stl_algobase.h (__memmove): Remove.
6512         (__copy_move<M, true, random_access_iterator_tag>::__copy_m)
6513         (__copy_move_backward<M, true, random_access_iterator_tag>::__copy_m):
6514         Use __builtin_memmove directly instead of __memmove.
6515         (__copy_move_a2): Do not use memmove during constant evaluation.
6516         (__copy_move_backward_a2): Use _IsMove constant to select correct
6517         __copy_move_backward specialization.
6518         * testsuite/25_algorithms/copy_backward/constexpr.cc: Check for copies
6519         begin turned into moves during constant evaluation.
6520
6521         * testsuite/25_algorithms/move_backward/93872.cc: Add test left out of
6522         previous commit.
6523
6524         PR libstdc++/93872
6525         * include/bits/stl_algobase.h (__memmove): Cast away const before
6526         doing move assignment.
6527         * testsuite/25_algorithms/move/93872.cc: New test.
6528         * testsuite/25_algorithms/move_backward/93872.cc: New test.
6529
6530 2020-02-24  Patrick Palka  <ppalka@redhat.com>
6531
6532         PR libstdc++/93884
6533         * include/bits/ranges_algobase.h (__copy_or_move,
6534         __copy_or_move_backward): Don't inspect the iter_value_t of the output
6535         iterator, instead inspect its iterator_traits directly.
6536         * include/bits/stl_iterator.h (back_insert_iterator::container):
6537         Conditionally initialize.
6538         (back_insert_iterator::difference_type): Conditionally define.
6539         (back_insert_iterator::back_insert_iterator): Conditionally define this
6540         default constructor.
6541         (front_insert_iterator::container): Conditionally initialize.
6542         (front_insert_iterator::difference_type): Conditionally define.
6543         (front_insert_iterator::front_insert_iterator): Conditionally define
6544         this default constructor.
6545         * 24_iterators/back_insert_iterator/pr93884.cc: New test.
6546         * 24_iterators/front_insert_iterator/pr93884.cc: New test.
6547
6548         P0769R2 Add shift to <algorithm>
6549         * include/bits/ranges_algo.h (shift_left, shift_right): New.
6550         * testsuite/25_algorithms/shift_left/1.cc: New test.
6551         * testsuite/25_algorithms/shift_right/1.cc: New test.
6552
6553 2020-02-24  Jonathan Wakely  <jwakely@redhat.com>
6554
6555         * include/bits/stream_iterator.h (istream_iterator(default_sentinel_t)):
6556         Make noexcept-specifier conditional.
6557         * testsuite/24_iterators/istream_iterator/cons/sentinel.cc: Check
6558         noexcept-specifier.
6559
6560         * include/bits/stream_iterator.h (istream_iterator(default_sentinel_t)):
6561         Add constructor.
6562         (operator==(istream_iterator, default_sentinel_t)): Add operator.
6563         (ostream_iterator::difference_type): Define to ptrdiff_t for C++20.
6564         * include/bits/streambuf_iterator.h
6565         (istreambuf_iterator(default_sentinel_t)): Add constructor.
6566         (operator==(istreambuf_iterator, default_sentinel_t)): Add operator.
6567         * testsuite/24_iterators/istream_iterator/cons/sentinel.cc:
6568         New test.
6569         * testsuite/24_iterators/istream_iterator/sentinel.cc: New test.
6570         * testsuite/24_iterators/istreambuf_iterator/cons/sentinel.cc:
6571         New test.
6572         * testsuite/24_iterators/istreambuf_iterator/sentinel.cc: New test.
6573
6574         * include/std/ranges (__deep_const_range, __enable_view_impl): Remove.
6575         (ranges::enable_view): Simplify (LWG 3326).
6576         * include/bits/range_access.h (ranges::enable_view): Declare.
6577         * include/bits/regex.h (__enable_view_impl): Remove partial
6578         specialization.
6579         * include/bits/stl_multiset.h (__enable_view_impl): Likewise.
6580         * include/bits/stl_set.h (__enable_view_impl): Likewise.
6581         * include/bits/unordered_set.h (__enable_view_impl): Likewise.
6582         * include/debug/multiset.h (__enable_view_impl): Likewise.
6583         * include/debug/set.h (__enable_view_impl): Likewise.
6584         * include/debug/unordered_set (__enable_view_impl): Likewise.
6585         * include/experimental/string_view (ranges::enable_view): Define
6586         partial specialization.
6587         * include/std/span (ranges::enable_view): Likewise.
6588         * include/std/string_view (ranges::enable_view): Likewise.
6589         * testsuite/std/ranges/view.cc: Check satisfaction of updated concept.
6590
6591 2020-02-21  Jonathan Wakely  <jwakely@redhat.com>
6592
6593         * include/std/optional (operator<=>(optional<T>, optional<U>))
6594         (operator<=>(optional<T>, nullopt), operator<=>(optional<T>, U)):
6595         Define for C++20.
6596         * include/std/tuple (__tuple_cmp): New helper function for <=>.
6597         (operator<=>(tuple<T...>, tuple<U>...)): Define for C++20.
6598         * include/std/variant (operator<=>(variant<T...>, variant<T...>))
6599         (operator<=>(monostate, monostate)): Define for C++20.
6600         * testsuite/20_util/optional/relops/three_way.cc: New test.
6601         * testsuite/20_util/tuple/comparison_operators/three_way.cc: New test.
6602         * testsuite/20_util/variant/89851.cc: Move to ...
6603         * testsuite/20_util/variant/relops/89851.cc: ... here.
6604         * testsuite/20_util/variant/90008.cc: Move to ...
6605         * testsuite/20_util/variant/relops/90008.cc: ... here.
6606         * testsuite/20_util/variant/relops/three_way.cc: New test.
6607
6608 2020-02-20  Patrick Palka  <ppalka@redhat.com>
6609
6610         * include/std/ranges (views::__adaptor::__maybe_refwrap): New utility
6611         function.
6612         (views::__adaptor::_RangeAdaptor::operator()): Add comments.  Use
6613         __maybe_refwrap to capture lvalue references by reference, and then use
6614         unwrap_reference_t to forward the by-reference captures as references.
6615         * testsuite/std/ranges/adaptors/split.cc: Augment test.
6616         * testsuite/std/ranges/adaptors/split_neg.cc: New test.
6617
6618         * include/std/ranges (iota_view): Forward declare _Sentinel.
6619         (iota_view::_Iterator): Befriend _Sentinel.
6620         (iota_view::_Sentinel::_M_equal): New member function.
6621         (iota_view::_Sentinel::operator==): Use it.
6622         (views::_Iota::operator()): Forward __f using the correct type.
6623         * testsuite/std/ranges/access/ssize.cc (test06): Don't call views::iota
6624         with integers of different signedness, to appease iota_view's deduction
6625         guide.
6626         * testsuite/std/ranges/iota/iota_view.cc: Augment test.
6627
6628 2020-02-20  Jonathan Wakely  <jwakely@redhat.com>
6629
6630         * include/bits/range_access.h (ranges::begin): Reject array of
6631         incomplete type.
6632         (ranges::end, ranges::size): Require arrays to be bounded.
6633         (ranges::data): Require lvalue or borrowed_range.
6634         (ranges::iterator_t): Remove constraint.
6635         * testsuite/std/ranges/access/begin.cc: Do not check array of
6636         incomplete type.
6637         * testsuite/std/ranges/access/begin_neg.cc: New test.
6638         * testsuite/std/ranges/access/end_neg.cc: Adjust expected error.
6639         * testsuite/std/ranges/access/size_neg.cc: Adjust expected error.
6640         * testsuite/std/ranges/access/ssize.cc: Do not check array of
6641         incomplete type.
6642
6643         * include/std/system_error (error_category::operator<=>)
6644         (operator<=>(const error_code&, const error_code&))
6645         (operator<=>(const error_condition&, const error_condition&)): Define
6646         for C++20.
6647         * testsuite/19_diagnostics/error_category/operators/less.cc: New test.
6648         * testsuite/19_diagnostics/error_category/operators/three_way.cc: New
6649         test.
6650         * testsuite/19_diagnostics/error_code/operators/equal.cc: Remove
6651         incorrect comment.
6652         * testsuite/19_diagnostics/error_code/operators/less.cc: New test.
6653         * testsuite/19_diagnostics/error_code/operators/not_equal.cc: Remove
6654         incorrect comment.
6655         * testsuite/19_diagnostics/error_code/operators/three_way.cc: New test.
6656         * testsuite/19_diagnostics/error_condition/operators/equal.cc: Remove
6657         incorrect comment.
6658         * testsuite/19_diagnostics/error_condition/operators/less.cc: New test.
6659         * testsuite/19_diagnostics/error_condition/operators/not_equal.cc:
6660         Remove incorrect comment.
6661         * testsuite/19_diagnostics/error_condition/operators/three_way.cc: New
6662         test.
6663
6664         * libsupc++/typeinfo (type_info::operator!=): Remove for C++20.
6665
6666         * include/std/thread (thread::id::operator<=>): Define for C++20.
6667         * testsuite/30_threads/thread/id/70294.cc: Do not take addresses of
6668         functions in namespace std.
6669         * testsuite/30_threads/thread/id/operators_c++20.cc: New test.
6670
6671 2020-02-19  Patrick Palka  <ppalka@redhat.com>
6672
6673         * testsuite/std/ranges/adaptors/split.cc (test03): Don't include the
6674         null terminator of the underlying string as part of the test_range.
6675         (main): Call test03.
6676
6677 2020-02-19  Jonathan Wakely  <jwakely@redhat.com>
6678
6679         * include/bits/stl_iterator.h (common_iterator): Add copyable<I>
6680         requirement (LWG 3385).
6681         * testsuite/24_iterators/headers/iterator/synopsis_c++20.cc: Adjust
6682         expected declaration.
6683
6684         * include/std/ranges (take_while_view, drop_view, drop_while_view)
6685         (elements_view:_Iterator): Initialize data members (LWG 3364).
6686
6687         * libsupc++/compare (three_way_comparable): Remove always-false check
6688         that should have been removed with weak_equality (P1959R0).
6689         (three_way_comparable_with): Likewise. Reorder requirements (LWG 3360).
6690
6691         * include/std/concepts (__detail::__partially_ordered_with): Move here
6692         from <compare>.
6693         (totally_ordered, totally_ordered_with): Use __partially_ordered_with
6694         to simplify definition (LWG 3331).
6695         * libsupc++/compare (__detail::__partially_ordered_with): Move to
6696         <concepts>.
6697
6698         * include/std/concepts (totally_ordered_with): Remove redundant
6699         requirement (LWG 3329).
6700
6701         * include/std/ranges (__detail::__convertible_to_non_slicing): New
6702         helper concept.
6703         (__detail::__pair_like_convertible_to): Remove.
6704         (__detail::__pair_like_convertible_from): Add requirements for
6705         non-slicing conversions.
6706         (subrange): Constrain constructors with __convertible_to_non_slicing.
6707         Remove constructors from pair-like types. Add new deduction guide.
6708         * testsuite/std/ranges/subrange/lwg3282_neg.cc: New test.
6709
6710         * include/bits/iterator_concepts.h (iter_move): Add declaration to
6711         prevent unqualified lookup finding a suitable declaration (LWG 3247).
6712
6713         * include/std/memory_resource (polymorphic_allocator::allocate)
6714         (polymorphic_allocator::allocate_object): Change type of exception to
6715         bad_array_new_length (LWG 3237).
6716         * testsuite/20_util/polymorphic_allocator/lwg3237.cc: New test.
6717
6718         * include/std/type_traits (__cpp_lib_unwrap_ref): Define (LWG 3348).
6719         * include/std/version (__cpp_lib_unwrap_ref): Likewise.
6720         * testsuite/20_util/unwrap_reference/1.cc: Check macro.
6721         * testsuite/20_util/unwrap_reference/3.cc: New test.
6722
6723         * include/std/numeric (midpoint(T8, T*)): Do not check for complete
6724         type during overload resolution, use static assert instead (LWG 3200).
6725         * testsuite/26_numerics/midpoint/pointer.cc: Do not test with
6726         incomplete type.
6727         * testsuite/26_numerics/midpoint/pointer_neg.cc: New test.
6728
6729         * include/std/span (span(T (&)[N])): Use non-deduced context to
6730         prevent first parameter from interfering with class template argument
6731         deduction (LWG 3369).
6732         * testsuite/23_containers/span/deduction.cc: Add missing 'const'.
6733         * testsuite/23_containers/span/lwg3255.cc: Check for construction from
6734         rvalues.
6735
6736         * include/std/span (span::const_iterator, span::const_reverse_iterator)
6737         (span::cbegin(), span::cend(), span::crbegin(), span::crend()):
6738         Remove (LWG 3320).
6739         * testsuite/23_containers/span/everything.cc: Replace uses of cbegin
6740         and cend.
6741         * testsuite/20_util/specialized_algorithms/destroy/constrained.cc:
6742         Likewise.
6743         * testsuite/20_util/specialized_algorithms/uninitialized_copy/
6744         constrained.cc: Likewise.
6745         * testsuite/20_util/specialized_algorithms/
6746         uninitialized_default_construct/constrained.cc: Likewise.
6747         * testsuite/20_util/specialized_algorithms/uninitialized_fill/
6748         constrained.cc: Likewise.
6749         * testsuite/20_util/specialized_algorithms/uninitialized_move/
6750         constrained.cc: Likewise.
6751         * testsuite/20_util/specialized_algorithms/
6752         uninitialized_value_construct/constrained.cc: Likewise.
6753
6754         * include/bits/range_access.h (range_size_t): Define alias template.
6755         * include/std/ranges (all_view): Rename to views::all_t (LWG 3335).
6756         * testsuite/std/ranges/adaptors/filter.cc: Adjust to new name.
6757
6758         * include/std/ranges (filter_view, transform_view, take_view)
6759         (join_view, split_view, reverse_view): Remove commented-out converting
6760         constructors (LWG 3280).
6761
6762         * include/std/memory (uninitialized_construct_using_allocator): Use
6763         std::construct_at (LWG 3321).
6764
6765         * include/std/memory_resource (polymorphic_allocator::allocate_bytes)
6766         (polymorphic_allocator::allocate_object)
6767         (polymorphic_allocator::new_object): Add nodiscard attribute (LWG3304).
6768
6769         LWG 3379. "safe" in several library names is misleading
6770         * include/bits/range_access.h (enable_safe_range): Rename to
6771         enable_borrowed_range.
6772         (__detail::__maybe_safe_range): Rename to __maybe_borrowed_range.
6773         (safe_range): Rename to borrowed_range.
6774         * include/bits/ranges_algo.h: Adjust to use new names.
6775         * include/bits/ranges_algobase.h: Likewise.
6776         * include/bits/ranges_uninitialized.h: Likewise.
6777         * include/std/ranges: Likewise.
6778         (safe_iterator_t): Rename to borrowed_iterator_t.
6779         (safe_subrange_t): Rename to borrowed_subrange_t.
6780         * include/std/span: Adjust to use new names.
6781         * include/std/string_view: Likewise.
6782         * include/experimental/string_view: Likewise.
6783         * testsuite/std/ranges/access/begin.cc: Likewise.
6784         * testsuite/std/ranges/access/cbegin.cc: Likewise.
6785         * testsuite/std/ranges/access/cdata.cc: Likewise.
6786         * testsuite/std/ranges/access/cend.cc: Likewise.
6787         * testsuite/std/ranges/access/crbegin.cc: Likewise.
6788         * testsuite/std/ranges/access/crend.cc: Likewise.
6789         * testsuite/std/ranges/access/data.cc: Likewise.
6790         * testsuite/std/ranges/access/end.cc: Likewise.
6791         * testsuite/std/ranges/access/rbegin.cc: Likewise.
6792         * testsuite/std/ranges/access/rend.cc: Likewise.
6793         * testsuite/std/ranges/safe_range.cc: Likewise.
6794         * testsuite/std/ranges/safe_range_types.cc: Likewise.
6795         * testsuite/util/testsuite_iterators.h: Likewise.
6796
6797         * include/std/ranges (tuple_element<0, const subrange<I, S, K>>)
6798         (tuple_element<1, const subrange<I, S, K>>): Add partial
6799         specializations (LWG 3398).
6800         * testsuite/std/ranges/subrange/tuple_like.cc: New test.
6801
6802         * include/bits/ranges_algo.h (__find_fn, __find_first_of_fn)
6803         (__adjacent_find_fn, __remove_if_fn, __remove_copy_if_fn)
6804         (__unique_fn, __unique_copy_fn): Remove redundant conversions to bool.
6805
6806 2020-02-18  Patrick Palka  <ppalka@redhat.com>
6807
6808         P1983R0 Wording for GB301, US296, US292, US291, and US283
6809         * include/std/ranges (filter_view::pred): New member function.
6810         (join_view::_Iterator::_Iterator): Remove now-redundant comment since
6811         P1983R0 fixes the highlighted issue in the same way.
6812         (join_view::_Iterator<_Const>): Add friend
6813         join_view::_Iterator<!_Const>.
6814         (join_view::_M_inner): Remove mutable specifier, effectively reverting
6815         the proposed wording changes of P3278.
6816         (join_view::begin): Refine the condition for when to return a const
6817         iterator.
6818         (split_view::_OuterIter::_OuterIter): Adjust constraints.
6819         * testsuite/std/ranges/adaptors/filter.cc: Test that filter_view::pred
6820         exists and works.
6821
6822 2020-02-18  Jonathan Wakely  <jwakely@redhat.com>
6823
6824         PR libstdc++/93818
6825         * include/std/ranges (_RangeAdaptor): Add deduction guide.
6826         (filter_view::_Iterator): Add alias _Vp_iter and use in place of
6827         iterator_t<_Vp>.
6828         (filter_view::_Iterator::_S_iter_cat()): Add 'typename'.
6829         (transform_view::_Iterator): Add alias _Base_iter and use in place of
6830         iterator_t<_Base>.
6831         (transform_view::_Iterator::_S_iter_cat()): Add 'typename'.
6832         (join_view::_Iterator): Add _Outer_iter and _Inner_iter aliases.
6833         (join_view::_Iterator::_S_iter_cat()): Add 'typename'.
6834         (split_view::_InnerIter::_S_iter_cat()): Likewise.
6835
6836         * testsuite/20_util/integer_comparisons/equal.cc: Fix invalid
6837         assumption that long is wider than int.
6838         * testsuite/20_util/integer_comparisons/greater_equal.cc: Likewise.
6839         * testsuite/20_util/integer_comparisons/less.cc: Likewise.
6840         * testsuite/20_util/integer_comparisons/less_equal.cc: Likewise.
6841         * testsuite/20_util/integer_comparisons/not_equal.cc: Likewise.
6842
6843         P1976R2 Fixed-size span construction from dynamic range
6844         * include/std/span (__cpp_lib_span): Update value.
6845         (span(It, size_type), span(It, End)): Make conditionally explicit. Add
6846         assertion.
6847         (span(R&&), span(const span<OType, OExtent>&)): Likewise and relax
6848         constraints.
6849         (span::first<Count>(), span::last<Count>()): Use explicit type in
6850         return statement.
6851         (as_bytes, as_writable_bytes): Likewise.
6852         * include/std/version (__cpp_lib_span): Update value.
6853         * testsuite/23_containers/span/1.cc: Check new value.
6854         * testsuite/23_containers/span/2.cc: Check new value.
6855         * testsuite/23_containers/span/explicit.cc: New test.
6856
6857         * include/std/span (span::__is_compatible_array): Simplify alias
6858         template by using requires-clause.
6859         (span::__is_compatible_ref): New alias template for constraining
6860         constructors.
6861         (span::__is_compatible_iterator, span::__is_compatible_range): Remove.
6862         (span(It, size_type), span(It, End)): Use __is_compatible_ref.
6863         (span(T(&)[N], span(array<T, N>&), span(const array<T, N>&)): Remove
6864         redundant parentheses.
6865         (span(R&&)): Add missing constraints.
6866
6867         * include/std/span (span): Reorder members and rename template
6868         parameters to match declarations in the C++2a working paper.
6869
6870         P2116R0 Remove tuple-like protocol support from fixed-extent span
6871         * include/std/span (get, tuple_size, tuple_element): Remove.
6872         * testsuite/23_containers/span/everything.cc: Remove checks for
6873         tuple-like API.
6874         * testsuite/23_containers/span/get_neg.cc: Remove.
6875         * testsuite/23_containers/span/tuple_element_dynamic_neg.cc: Remove.
6876         * testsuite/23_containers/span/tuple_element_oob_neg.cc: Remove.
6877         * testsuite/23_containers/span/tuple_size_neg.cc: Remove.
6878
6879 2020-02-17  Patrick Palka  <ppalka@redhat.com>
6880
6881         P2106R0 Alternative wording for GB315 and GB316
6882         * include/bits/ranges_algo.h (in_fun_result): New.
6883         (for_each_result, for_each_n_result): Change into an alias of
6884         in_fun_result.
6885         (in_in_result): New.
6886         (mismatch_result): Change into an alias of in_in_result.
6887         (copy_if_result): Change into an alias of in_out_result.
6888         (swap_ranges_result): Change into an alias of in_in_result.
6889         (unary_transform_result): Change into an alias of in_out_result.
6890         (in_in_out_result): New.
6891         (binary_transform_result): Change into an alias of in_in_out_result.
6892         (replace_copy_result, replace_copy_if_result, remove_copy_if_result,
6893         remove_copy_result, unique_copy_result, reverse_copy_result,
6894         rotate_copy_result, partial_sort_copy_result): Change into an alias of
6895         in_out_result.
6896         (in_out_out_result): New.
6897         (partition_copy_result, merge_result): Change into an alias of
6898         in_out_out_result.
6899         (set_union_result, set_intersection_result): Change into an alias of
6900         in_in_out_result.
6901         (set_difference_result): Change into an alias of in_out_result.
6902         (set_symmetric_difference): Change into an alias of in_in_out_result.
6903         (min_max_result): New.
6904         (minmax_result, minmax_element_result): Change into an alias of
6905         min_max_result.
6906         (in_found_result): New.
6907         (next_permutation_result, prev_permutation_result): Change into an alias
6908         of in_found_result.
6909         (__next_permutation_fn::operator(), __prev_permutation_fn::operator()):
6910         Adjust following changes to next_permutation_result and
6911         prev_permutation_result.
6912         * include/bits/ranges_algobase.h (in_out_result): New.
6913         (copy_result, move_result, move_backward_result, copy_backward_result,
6914         copy_n_result): Change into an alias of in_out_result.
6915         * include/bits/ranges_uninitialized.h (uninitialized_copy_result,
6916         uninitialized_copy_n_result, uninitialized_move_result,
6917         uninitialized_move_n_result): Likewise.
6918         * testsuite/25_algorithms/next_permutation/constrained.cc: Adjust uses of
6919         structured bindings.
6920         * testsuite/25_algorithms/prev_permutation/constrained.cc: Likewise.
6921
6922         P1243R4 Rangify new algorithms
6923         * include/bits/ranges_algo.h (for_each_n_result, __for_each_n_fn,
6924         for_each_n, __sample_fn, sample, __clamp_fn, clamp): New.
6925         * testsuite/25_algorithms/clamp/constrained.cc: New test.
6926         * testsuite/25_algorithms/for_each/constrained.cc: Augment test.
6927         * testsuite/25_algorithms/sample/constrained.cc: New test.
6928
6929 2020-02-17  Jonathan Wakely  <jwakely@redhat.com>
6930
6931         P1964R2 Wording for boolean-testable
6932         * include/bits/ranges_algo.h (__find_fn, __find_first_of_fn)
6933         (__adjacent_find_fn): Cast result of predicate to bool.
6934         * include/std/concepts (__boolean): Remove.
6935         (__detail::__boolean_testable_impl, __detail::__boolean_testable): Add
6936         new helper concepts.
6937         (__detail::__weakly_eq_cmp_with, totally_ordered, totally_ordered_with)
6938         (predicate): Use __boolean_testable instead of boolean.
6939         * libsupc++/compare (__detail::__partially_ordered, _Synth3way):
6940         Likewise.
6941
6942         P1970R2 Consistency for size() functions: Add ranges::ssize
6943         * include/bits/range_access.h (_SSize, ssize): Define for C++20.
6944         * testsuite/std/ranges/access/ssize.cc: New test.
6945
6946         P1956R1 On the names of low-level bit manipulation functions
6947         * include/bits/hashtable_policy.h: Update comment.
6948         * include/std/bit (__ispow2, __ceil2, __floor2, __log2p1): Rename.
6949         (ispow2, ceil2, floor2, log2p1): Likewise.
6950         (__cpp_lib_int_pow2): Add feature test macro.
6951         * include/std/charconv (__to_chars_len_2): Adjust use of __log2p1.
6952         * include/std/memory (assume_aligned): Adjust use of ispow2.
6953         * include/std/version (__cpp_lib_int_pow2): Add.
6954         * libsupc++/new_opa.cc: Adjust use of __ispow2.
6955         * src/c++17/memory_resource.cc: Likewise, and for __ceil2 and __log2p1.
6956         * testsuite/17_intro/freestanding.cc: Adjust use of ispow2.
6957         * testsuite/26_numerics/bit/bit.pow.two/ceil2.cc: Rename to ...
6958         * testsuite/26_numerics/bit/bit.pow.two/bit_ceil.cc: ... here.
6959         * testsuite/26_numerics/bit/bit.pow.two/ceil2_neg.cc: Rename to ...
6960         * testsuite/26_numerics/bit/bit.pow.two/bit_ceil_neg.cc: ... here.
6961         * testsuite/26_numerics/bit/bit.pow.two/floor2.cc: Rename to ...
6962         * testsuite/26_numerics/bit/bit.pow.two/bit_floor.cc: ... here.
6963         * testsuite/26_numerics/bit/bit.pow.two/log2p1.cc: Rename to ...
6964         * testsuite/26_numerics/bit/bit.pow.two/bit_width.cc: ... here.
6965         * testsuite/26_numerics/bit/bit.pow.two/ispow2.cc: Rename to ...
6966         * testsuite/26_numerics/bit/bit.pow.two/has_single_bit.cc: ... here.
6967
6968         * include/std/charconv: Add comment.
6969
6970         PR libstdc++/92546 (partial)
6971         * include/bits/random.h (uniform_random_bit_generator): Move definition
6972         to <bits/uniform_int_dist.h>.
6973         * include/bits/ranges_algo.h: Include <bits/uniform_int_dist.h> instead
6974         of <bits/random.h>.
6975         * include/bits/ranges_algobase.h: Do not include <cmath>.
6976         * include/bits/uniform_int_dist.h (uniform_random_bit_generator):
6977         Move here.
6978         * include/std/ranges: Do not include <limits>.
6979         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error lineno.
6980
6981         PR libstdc++/92546 (partial)
6982         * include/Makefile.am: Add new header.
6983         * include/Makefile.in: Regenerate.
6984         * include/bits/int_limits.h: New header.
6985         * include/bits/parse_numbers.h (__select_int::_Select_int): Replace
6986         numeric_limits with __detail::__int_limits.
6987         * include/std/bit (__rotl, __rotr, __countl_zero, __countl_one)
6988         (__countr_zero, __countr_one, __popcount, __ceil2, __floor2, __log2p1):
6989         Likewise.
6990         * include/std/charconv (__to_chars_8, __from_chars_binary)
6991         (__from_chars_alpha_to_num, from_chars): Likewise.
6992         * include/std/memory_resource (polymorphic_allocator::allocate)
6993         (polymorphic_allocator::allocate_object): Likewise.
6994         * include/std/string_view (basic_string_view::_S_compare): Likewise.
6995         * include/std/utility (in_range): Likewise.
6996         * testsuite/20_util/integer_comparisons/in_range_neg.cc: Adjust for
6997         extra error about incomplete type __int_limits<bool>.
6998         * testsuite/26_numerics/bit/bit.count/countl_one.cc: Include <limits>.
6999         * testsuite/26_numerics/bit/bit.count/countl_zero.cc: Likewise.
7000         * testsuite/26_numerics/bit/bit.count/countr_one.cc: Likewise.
7001         * testsuite/26_numerics/bit/bit.count/countr_zero.cc: Likewise.
7002         * testsuite/26_numerics/bit/bit.count/popcount.cc: Likewise.
7003         * testsuite/26_numerics/bit/bit.pow.two/ceil2_neg.cc: Likewise.
7004         * testsuite/26_numerics/bit/bit.pow.two/ceil2.cc: Likewise.
7005         * testsuite/26_numerics/bit/bit.pow.two/floor2.cc: Likewise.
7006         * testsuite/26_numerics/bit/bit.pow.two/ispow2.cc: Likewise.
7007         * testsuite/26_numerics/bit/bit.pow.two/log2p1.cc: Likewise.
7008         * testsuite/26_numerics/bit/bit.rotate/rotl.cc: Likewise.
7009         * testsuite/26_numerics/bit/bit.rotate/rotr.cc: Likewise.
7010
7011         * python/libstdcxx/v6/printers.py (StdCmpCatPrinter.to_string): Update
7012         value for partial_ordering::unordered.
7013
7014         * include/bits/iterator_concepts.h (indirectly_copyable_storable): Add
7015         const-qualified expression variations.
7016         * include/std/concepts (copyable): Likewise.
7017
7018         * include/std/type_traits (__is_standard_integer): New helper trait.
7019         * include/std/utility (cmp_equal, cmp_not_equal, cmp_less, cmp_greater)
7020         (cmp_less_equal, cmp_greater_equal, in_range): Define for C++20.
7021         * include/std/version (__cpp_lib_integer_comparison_functions): Define.
7022         * testsuite/20_util/integer_comparisons/1.cc: New test.
7023         * testsuite/20_util/integer_comparisons/2.cc: New test.
7024         * testsuite/20_util/integer_comparisons/equal.cc: New test.
7025         * testsuite/20_util/integer_comparisons/equal_neg.cc: New test.
7026         * testsuite/20_util/integer_comparisons/greater_equal.cc: New test.
7027         * testsuite/20_util/integer_comparisons/greater_equal_neg.cc: New test.
7028         * testsuite/20_util/integer_comparisons/greater_neg.cc: New test.
7029         * testsuite/20_util/integer_comparisons/in_range.cc: New test.
7030         * testsuite/20_util/integer_comparisons/in_range_neg.cc: New test.
7031         * testsuite/20_util/integer_comparisons/less.cc: New test.
7032         * testsuite/20_util/integer_comparisons/less_equal.cc: New test.
7033         * testsuite/20_util/integer_comparisons/less_equal_neg.cc: New test.
7034         * testsuite/20_util/integer_comparisons/less_neg.cc: New test.
7035         * testsuite/20_util/integer_comparisons/not_equal.cc: New test.
7036         * testsuite/20_util/integer_comparisons/not_equal_neg.cc: New test.
7037
7038 2020-02-16  Patrick Palka  <ppalka@redhat.com>
7039
7040         * include/bits/ranges_algo.h (__lexicographical_compare_fn::operator()):
7041         Move code after an early exit constexpr if to under an else branch.
7042         * include/bits/ranges_algobase.h (__equal_fn::operator()): Likewise.
7043
7044 2020-02-15  Patrick Palka  <ppalka@redhat.com>
7045
7046         * include/bits/ranges_algo.h: Adjust whitespace and formatting.
7047         * include/bits/ranges_algobase.h: Likewise.
7048         * include/bits/ranges_uninitialized.h: Likewise.
7049
7050         * include/bits/ranges_algo.h: (adjacent_find, all_of, any_of,
7051         binary_search, copy_if, count, count_if, equal_range, find, find_end,
7052         find_first_of, find_if, find_if_not, for_each, generate, generate_n,
7053         includes, inplace_merge, is_heap, is_heap_until, is_partitioned,
7054         is_permutation, is_sorted, is_sorted_until, lexicographical_compare,
7055         lower_bound, make_heap, max, max_element, merge, min, min_element,
7056         minmax, minmax_element, mismatch, next_permutation, none_of,
7057         nth_element, partial_sort, partial_sort_copy, partition, partition_copy,
7058         partition_point, pop_heap, prev_permutation, push_heap, remove,
7059         remove_copy, remove_copy_if, remove_if, replace, replace_copy,
7060         replace_copy_if, replace_if, reverse, reverse_copy, rotate, rotate_copy,
7061         search, search_n, set_difference, set_intersection,
7062         set_symmetric_difference, set_union, shuffle, sort, sort_heap,
7063         stable_partition, stable_sort, swap_ranges, transform, unique,
7064         unique_copy, upper_bound): Convert into function objects.
7065         * include/bits/ranges_algobase.h: (equal, copy, move, copy_n, fill_n,
7066         fill, move_backward, copy_backward): Likewise.
7067         * include/bits/ranges_uninitialized.h (uninitialized_default_construct,
7068         uninitialized_default_construct_n, uninitialized_value_construct,
7069         uninitialized_value_construct_n, uninitialized_copy,
7070         uninitialized_copy_n, uninitialized_move, uninitialized_move_n,
7071         uninitialized_fill, uninitialized_fill_n, construct_at, destroy_at,
7072         destroy, destroy_n): Likewise.
7073
7074         * include/bits/ranges_algo.h (ranges::__find_end): Fold into ...
7075         (ranges::find_end): ... here.
7076         (ranges::__lexicographical_compare): Fold into ...
7077         (ranges::lexicographical_compare): ... here.
7078         * include/bits/ranges_algobase.h (ranges::__equal): Fold into ...
7079         (ranges::equal): ... here.
7080
7081 2020-02-15  Jonathan Wakely  <jwakely@redhat.com>
7082
7083         * include/bits/erase_if.h (__cpp_lib_erase_if): Define to 202002L.
7084         * include/std/deque: Likewise.
7085         * include/std/forward_list: Likewise.
7086         * include/std/list: Likewise.
7087         * include/std/string: Likewise.
7088         * include/std/vector: Likewise.
7089         * include/std/version: Likewise.
7090         * testsuite/23_containers/deque/erasure.cc: Test for new value.
7091         * testsuite/23_containers/forward_list/erasure.cc: Likewise.
7092         * testsuite/23_containers/list/erasure.cc: Likewise.
7093         * testsuite/23_containers/map/erasure.cc: Likewise.
7094         * testsuite/23_containers/set/erasure.cc: Likewise.
7095         * testsuite/23_containers/unordered_map/erasure.cc: Likewise.
7096         * testsuite/23_containers/unordered_set/erasure.cc: Likewise.
7097         * testsuite/23_containers/vector/erasure.cc: Likewise.
7098
7099 2020-02-15  Jonathan Wakely  <jwakely@redhat.com>
7100
7101         * include/bits/random.h (uniform_random_bit_generator): Require min()
7102         and max() to be constant expressions and min() to be less than max().
7103         * testsuite/26_numerics/random/concept.cc: Check additional cases.
7104         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error lineno.
7105
7106 2020-02-13  Patrick Palka  <ppalka@redhat.com>
7107
7108         * include/Makefile.am: Add <bits/ranges_uninitialized.h>.
7109         * include/Makefile.in: Regenerate.
7110         * include/bits/ranges_uninitialized.h: New header.
7111         * include/std/memory: Include it.
7112         * testsuite/20_util/specialized_algorithms/destroy/constrained.cc: New
7113         test.
7114         * .../uninitialized_copy/constrained.cc: New test.
7115         * .../uninitialized_default_construct/constrained.cc: New test.
7116         * .../uninitialized_fill/constrained.cc: New test.
7117         * .../uninitialized_move/constrained.cc: New test.
7118         * .../uninitialized_value_construct/constrained.cc: New test.
7119
7120         * include/Makefile.am: Add bits/ranges_algobase.h
7121         * include/Makefile.in: Regenerate.
7122         * bits/ranges_algo.h: Include <bits/ranges_algobase.h> and refactor
7123         existing #includes.
7124         (__detail::__is_normal_iterator, __detail::is_reverse_iterator,
7125         __detail::__is_move_iterator, copy_result, move_result,
7126         __equal, equal, copy_result, move_result, move_backward_result,
7127         copy_backward_result, __copy_or_move_backward, __copy_or_move, copy,
7128         move, copy_backward, move_backward, copy_n_result, copy_n, fill_n,
7129         fill): Split out into ...
7130         * bits/range_algobase.h: ... this new header.
7131
7132 2020-02-12  Patrick Palka  <ppalka@redhat.com>
7133
7134         LWG 3389 and LWG 3390
7135         * include/bits/stl_iterator.h (move_move_iterator): Use std::move when
7136         constructing the move_iterator with __i.
7137         (counted_iterator::counted_iterator): Use std::move when initializing
7138         M_current with __i.
7139         * testsuite/24_iterators/counted_iterator/lwg3389.cc: New test.
7140         * testsuite/24_iterators/move_iterator/lwg3390.cc: New test.
7141
7142 2020-02-12  Sandra Loosemore  <sandra@codesourcery.com>
7143
7144         PR libstdc++/79193
7145         PR libstdc++/88999
7146
7147         * configure: Regenerated.
7148
7149 2020-02-12  François Dumont  <fdumont@gcc.gnu.org>
7150
7151         * include/bits/hashtable.h
7152         (_Hashtable<>(_Hashtable&&, std::allocator_type&)): Add
7153         missing std namespace qualification to forward call.
7154
7155 2020-02-09  Jonathan Wakely  <jwakely@redhat.com>
7156
7157         * testsuite/20_util/function_objects/range.cmp/equal_to.cc: Fix
7158         comment.
7159         * testsuite/20_util/function_objects/range.cmp/less.ccL Likewise.
7160
7161         * include/std/ranges: Fix non-ASCII characters in comment.
7162
7163         * include/bits/range_cmp.h (__detail::__eq_builtin_ptr_cmp): Require
7164         equality comparison to be valid and return bool.
7165         (__detail::__less_builtin_ptr_cmp): Likewise for less-than comparison.
7166         * testsuite/20_util/function_objects/range.cmp/equal_to.cc: Check
7167         type with ambiguous conversion to fundamental types.
7168         * testsuite/20_util/function_objects/range.cmp/less.cc: Likewise.
7169
7170 2020-02-07  Jonathan Wakely  <jwakely@redhat.com>
7171
7172         * include/bits/iterator_concepts.h (iter_difference_t, iter_value_t):
7173         Use remove_cvref_t.
7174         (readable_traits): Rename to indirectly_readable_traits.
7175         (readable): Rename to indirectly_readable.
7176         (writable): Rename to indirectly_writable.
7177         (__detail::__iter_exchange_move): Do not use remove_reference_t.
7178         (indirectly_swappable): Adjust requires expression parameter types.
7179         expression.
7180         * include/bits/ranges_algo.h (ranges::transform, ranges::replace)
7181         (ranges::replace_if, ranges::generate_n, ranges::generate)
7182         (ranges::remove): Use new name for writable.
7183         * include/bits/stl_iterator.h (__detail::__common_iter_has_arrow):
7184         Use new name for readable.
7185         * include/ext/pointer.h (readable_traits<_Pointer_adapter<P>>): Use
7186         new name for readable_traits.
7187         * testsuite/24_iterators/associated_types/readable.traits.cc: Likewise.
7188         * testsuite/24_iterators/indirect_callable/projected.cc: Adjust for
7189         new definition of indirectly_readable.
7190
7191         * include/bits/stl_iterator.h (__detail::__common_iter_ptr): Change
7192         to take parameters of common_iterator, instead of the common_iterator
7193         type itself. Fix argument for __common_iter_has_arrow constraint.
7194         (iterator_traits<common_iterator<I, S>>::pointer): Adjust.
7195
7196 2020-02-07  Jonathan Wakely  <jwakely@redhat.com>
7197
7198         * include/std/ranges (iota_view): Add braces to prevent -Wempty-body
7199         warning.
7200         (basic_istream_view::_Iterator::operator++()): Add missing return.
7201
7202 2020-02-07  Patrick Palka  <ppalka@redhat.com>
7203
7204         * include/bits/ranges_algo.h: Remove extraneous &&.
7205
7206         * include/std/ranges (ranges::__detail::__stream_extractable,
7207         ranges::basic_istream_view, ranges::istream_view): Define.
7208         * testsuite/std/ranges/istream_view: New test.
7209
7210         Implement C++20 range adaptors
7211         * include/std/ranges: Include <bits/refwrap.h> and <tuple>.
7212         (subrange::_S_store_size): Mark as const instead of constexpr to
7213         avoid what seems to be a bug in GCC.
7214         (__detail::__box): Give it defaulted copy and move constructors.
7215         (ranges::views::_Single::operator()): Mark constexpr.
7216         (ranges::views::_Iota::operator()): Mark constexpr.
7217         (__detail::Empty): Define.
7218         (ranges::views::__closure::_RangeAdaptor,
7219         ranges::views::__closure::_RangeAdaptorClosure, ref_view, all_view,
7220         ranges::views::all, ranges::__detail::find_if,
7221         ranges::__detail::find_if_not, ranges::__detail::mismatch,
7222         ranges::detail::min, filter_view, ranges::views::filter, transform_view,
7223         ranges::views::transform, take_view, ranges::views::take,
7224         take_while_view, ranges::views::take_while, drop_view,
7225         ranges::views::drop, join_view, ranges::views::join,
7226         __detail::require_constant, __detail::tiny_range, split_view,
7227         ranges::views::split, ranges::views::_Counted, ranges::views::counted,
7228         common_view, ranges::views::common, reverse_view,
7229         ranges::views::reverse,
7230         ranges::views::__detail::__is_reversible_subrange,
7231         ranges::views::__detail::__is_reverse_view, reverse_view,
7232         ranges::views::reverse, __detail::__has_tuple_element, elements_view,
7233         ranges::views::elements, ranges::views::keys, ranges::views::values):
7234         Define.
7235         (views): Alias for ranges::views.
7236         (tuple_size<ranges::subrange<>>, tuple_element<0, ranges::subrange>,
7237         tuple_element<1, ranges::subrange>): New partial specializations.
7238         * testsuite/std/ranges/adaptors/all.cc: New test.
7239         * testsuite/std/ranges/adaptors/common.cc: Likewise.
7240         * testsuite/std/ranges/adaptors/counted.cc: Likewise.
7241         * testsuite/std/ranges/adaptors/drop.cc: Likewise.
7242         * testsuite/std/ranges/adaptors/drop_while.cc: Likewise.
7243         * testsuite/std/ranges/adaptors/elements.cc: Likewise.
7244         * testsuite/std/ranges/adaptors/filter.cc: Likewise.
7245         * testsuite/std/ranges/adaptors/join.cc: Likewise.
7246         * testsuite/std/ranges/adaptors/reverse.cc: Likewise.
7247         * testsuite/std/ranges/adaptors/split.cc: Likewise.
7248         * testsuite/std/ranges/adaptors/take.cc: Likewise.
7249         * testsuite/std/ranges/adaptors/take_while.cc: Likewise.
7250         * testsuite/std/ranges/adaptors/transform.cc: Likewise.
7251
7252 2020-02-07  Jonathan Wakely  <jwakely@redhat.com>
7253
7254         * libsupc++/compare (__cmp_cat::type): Define typedef for underlying
7255         type of enumerations and comparison category types.
7256         (__cmp_cat::_Ord, __cmp_cat::_Ncmp): Add underlying type.
7257         (__cmp_cat::_Ncmp::unordered): Change value to 2.
7258         (partial_ordering::_M_value, weak_ordering::_M_value)
7259         (strong_ordering::_M_value): Change type to __cmp_cat::type.
7260         (partial_ordering::_M_is_ordered): Remove data member.
7261         (partial_ordering): Use second bit of _M_value for unordered. Adjust
7262         comparison operators.
7263         (weak_ordering::operator partial_ordering): Simplify to remove
7264         branches.
7265         (operator<=>(unspecified, weak_ordering)): Likewise.
7266         (strong_ordering::operator partial_ordering): Likewise.
7267         (strong_ordering::operator weak_ordering): Likewise.
7268         (operator<=>(unspecified, strong_ordering)): Likewise.
7269         * testsuite/18_support/comparisons/categories/partialord.cc: New test.
7270         * testsuite/18_support/comparisons/categories/strongord.cc: New test.
7271         * testsuite/18_support/comparisons/categories/weakord.cc: New test.
7272
7273         * include/std/ranges (iota_view::_Iterator): Fix typo in name of
7274         __cpp_lib_three_way_comparison macro and use deduced return type for
7275         operator<=>.
7276         * testsuite/std/ranges/iota/iterator.cc: New test.
7277
7278 2020-02-07  Patrick Palka  <ppalka@redhat.com>
7279             Jonathan Wakely  <jwakely@redhat.com>
7280
7281         Implement C++20 constrained algorithms
7282         * include/Makefile.am: Add new header.
7283         * include/Makefile.in: Regenerate.
7284         * include/std/algorithm: Include <bits/ranges_algo.h>.
7285         * include/bits/ranges_algo.h: New file.
7286         * testsuite/25_algorithms/adjacent_find/constrained.cc: New test.
7287         * testsuite/25_algorithms/all_of/constrained.cc: New test.
7288         * testsuite/25_algorithms/any_of/constrained.cc: New test.
7289         * testsuite/25_algorithms/binary_search/constrained.cc: New test.
7290         * testsuite/25_algorithms/copy/constrained.cc: New test.
7291         * testsuite/25_algorithms/copy_backward/constrained.cc: New test.
7292         * testsuite/25_algorithms/copy_if/constrained.cc: New test.
7293         * testsuite/25_algorithms/copy_n/constrained.cc: New test.
7294         * testsuite/25_algorithms/count/constrained.cc: New test.
7295         * testsuite/25_algorithms/count_if/constrained.cc: New test.
7296         * testsuite/25_algorithms/equal/constrained.cc: New test.
7297         * testsuite/25_algorithms/equal_range/constrained.cc: New test.
7298         * testsuite/25_algorithms/fill/constrained.cc: New test.
7299         * testsuite/25_algorithms/fill_n/constrained.cc: New test.
7300         * testsuite/25_algorithms/find/constrained.cc: New test.
7301         * testsuite/25_algorithms/find_end/constrained.cc: New test.
7302         * testsuite/25_algorithms/find_first_of/constrained.cc: New test.
7303         * testsuite/25_algorithms/find_if/constrained.cc: New test.
7304         * testsuite/25_algorithms/find_if_not/constrained.cc: New test.
7305         * testsuite/25_algorithms/for_each/constrained.cc: New test.
7306         * testsuite/25_algorithms/generate/constrained.cc: New test.
7307         * testsuite/25_algorithms/generate_n/constrained.cc: New test.
7308         * testsuite/25_algorithms/heap/constrained.cc: New test.
7309         * testsuite/25_algorithms/includes/constrained.cc: New test.
7310         * testsuite/25_algorithms/inplace_merge/constrained.cc: New test.
7311         * testsuite/25_algorithms/is_partitioned/constrained.cc: New test.
7312         * testsuite/25_algorithms/is_permutation/constrained.cc: New test.
7313         * testsuite/25_algorithms/is_sorted/constrained.cc: New test.
7314         * testsuite/25_algorithms/is_sorted_until/constrained.cc: New test.
7315         * testsuite/25_algorithms/lexicographical_compare/constrained.cc: New
7316         test.
7317         * testsuite/25_algorithms/lower_bound/constrained.cc: New test.
7318         * testsuite/25_algorithms/max/constrained.cc: New test.
7319         * testsuite/25_algorithms/max_element/constrained.cc: New test.
7320         * testsuite/25_algorithms/merge/constrained.cc: New test.
7321         * testsuite/25_algorithms/min/constrained.cc: New test.
7322         * testsuite/25_algorithms/min_element/constrained.cc: New test.
7323         * testsuite/25_algorithms/minmax/constrained.cc: New test.
7324         * testsuite/25_algorithms/minmax_element/constrained.cc: New test.
7325         * testsuite/25_algorithms/mismatch/constrained.cc: New test.
7326         * testsuite/25_algorithms/move/constrained.cc: New test.
7327         * testsuite/25_algorithms/move_backward/constrained.cc: New test.
7328         * testsuite/25_algorithms/next_permutation/constrained.cc: New test.
7329         * testsuite/25_algorithms/none_of/constrained.cc: New test.
7330         * testsuite/25_algorithms/nth_element/constrained.cc: New test.
7331         * testsuite/25_algorithms/partial_sort/constrained.cc: New test.
7332         * testsuite/25_algorithms/partial_sort_copy/constrained.cc: New test.
7333         * testsuite/25_algorithms/partition/constrained.cc: New test.
7334         * testsuite/25_algorithms/partition_copy/constrained.cc: New test.
7335         * testsuite/25_algorithms/partition_point/constrained.cc: New test.
7336         * testsuite/25_algorithms/prev_permutation/constrained.cc: New test.
7337         * testsuite/25_algorithms/remove/constrained.cc: New test.
7338         * testsuite/25_algorithms/remove_copy/constrained.cc: New test.
7339         * testsuite/25_algorithms/remove_copy_if/constrained.cc: New test.
7340         * testsuite/25_algorithms/remove_if/constrained.cc: New test.
7341         * testsuite/25_algorithms/replace/constrained.cc: New test.
7342         * testsuite/25_algorithms/replace_copy/constrained.cc: New test.
7343         * testsuite/25_algorithms/replace_copy_if/constrained.cc: New test.
7344         * testsuite/25_algorithms/replace_if/constrained.cc: New test.
7345         * testsuite/25_algorithms/reverse/constrained.cc: New test.
7346         * testsuite/25_algorithms/reverse_copy/constrained.cc: New test.
7347         * testsuite/25_algorithms/rotate/constrained.cc: New test.
7348         * testsuite/25_algorithms/rotate_copy/constrained.cc: New test.
7349         * testsuite/25_algorithms/search/constrained.cc: New test.
7350         * testsuite/25_algorithms/search_n/constrained.cc: New test.
7351         * testsuite/25_algorithms/set_difference/constrained.cc: New test.
7352         * testsuite/25_algorithms/set_intersection/constrained.cc: New test.
7353         * testsuite/25_algorithms/set_symmetric_difference/constrained.cc: New
7354         test.
7355         * testsuite/25_algorithms/set_union/constrained.cc: New test.
7356         * testsuite/25_algorithms/shuffle/constrained.cc: New test.
7357         * testsuite/25_algorithms/sort/constrained.cc: New test.
7358         * testsuite/25_algorithms/stable_partition/constrained.cc: New test.
7359         * testsuite/25_algorithms/stable_sort/constrained.cc: New test.
7360         * testsuite/25_algorithms/swap_ranges/constrained.cc: New test.
7361         * testsuite/25_algorithms/transform/constrained.cc: New test.
7362         * testsuite/25_algorithms/unique/constrained.cc: New test.
7363         * testsuite/25_algorithms/unique_copy/constrained.cc: New test.
7364         * testsuite/25_algorithms/upper_bound/constrained.cc: New test.
7365
7366 2020-02-06  Jonathan Wakely  <jwakely@redhat.com>
7367
7368         * include/bits/stl_iterator.h (__detail::__common_iter_ptr): Fix PR
7369         number in comment. Fix indentation.
7370
7371         * include/bits/stl_algobase.h (__iter_swap, __iter_swap<true>): Remove
7372         redundant _GLIBCXX20_CONSTEXPR.
7373
7374         * include/std/ranges (viewable_range): Replace decay_t with
7375         remove_cvref_t (LWG 3375).
7376
7377 2020-02-05  Jonathan Wakely  <jwakely@redhat.com>
7378
7379         * include/bits/iterator_concepts.h (iter_reference_t)
7380         (iter_rvalue_reference_t, iter_common_reference_t, indirect_result_t):
7381         Remove workarounds for PR c++/67704.
7382         * testsuite/24_iterators/aliases.cc: New test.
7383
7384 2020-02-05  Patrick Palka  <ppalka@redhat.com>
7385
7386         * include/bits/stl_iterator.h (move_iterator::move_iterator): Move __i
7387         when initializing _M_current.
7388         (move_iterator::base): Split into two overloads differing in
7389         ref-qualifiers as in P1207R4 for C++20.
7390
7391 2020-02-04  Jonathan Wakely  <jwakely@redhat.com>
7392
7393         * include/std/functional (_GLIBCXX_NOT_FN_CALL_OP): Un-define after
7394         use.
7395
7396         PR libstdc++/93562
7397         * include/bits/unique_ptr.h (__uniq_ptr_impl::swap): Define.
7398         (unique_ptr::swap, unique_ptr<T[], D>::swap): Call it.
7399         * testsuite/20_util/unique_ptr/modifiers/93562.cc: New test.
7400
7401 2020-02-01  Andrew Burgess  <andrew.burgess@embecosm.com>
7402
7403         * configure: Regenerate.
7404
7405 2020-01-31  Patrick Palka  <ppalka@redhat.com>
7406
7407         * testsuite/24_iterators/range_operations/distance.cc: Do not assume
7408         test_range::end() returns the same type as test_range::begin().
7409         * testsuite/24_iterators/range_operations/next.cc: Likewise.
7410         * testsuite/24_iterators/range_operations/prev.cc: Likewise.
7411         * testsuite/util/testsuite_iterators.h (__gnu_test::test_range::end):
7412         Always return a sentinel<I>.
7413
7414 2020-01-29  Jonathan Wakely  <jwakely@redhat.com>
7415
7416         PR libstdc++/92895
7417         * include/std/stop_token (stop_token::stop_possible()): Call new
7418         _M_stop_possible() function.
7419         (stop_token::stop_requested()): Do not use stop_possible().
7420         (stop_token::binary_semaphore): New class, as temporary stand-in for
7421         std::binary_semaphore.
7422         (stop_token::_Stop_cb::_M_callback): Add noexcept to type.
7423         (stop_token::_Stop_cb::_M_destroyed, stop_token::_Stop_cb::_M_done):
7424         New data members for symchronization with stop_callback destruction.
7425         (stop_token::_Stop_cb::_Stop_cb): Make non-template.
7426         (stop_token::_Stop_cb::_M_linked, stop_token::_Stop_cb::_S_execute):
7427         Remove.
7428         (stop_token::_Stop_cb::_M_run): New member function.
7429         (stop_token::_Stop_state::_M_stopped, stop_token::_Stop_state::_M_mtx):
7430         Remove.
7431         (stop_token::_Stop_state::_M_owners): New data member to track
7432         reference count for ownership.
7433         (stop_token::_Stop_state::_M_value): New data member combining a
7434         spinlock, the stop requested flag, and the reference count for
7435         associated stop_source objects.
7436         (stop_token::_Stop_state::_M_requester): New data member for
7437         synchronization with stop_callback destruction.
7438         (stop_token::_Stop_state::_M_stop_possible()): New member function.
7439         (stop_token::_Stop_state::_M_stop_requested()): Inspect relevant bit
7440         of _M_value.
7441         (stop_token::_Stop_state::_M_add_owner)
7442         (stop_token::_Stop_state::_M_release_ownership)
7443         (stop_token::_Stop_state::_M_add_ssrc)
7444         (stop_token::_Stop_state::_M_sub_ssrc): New member functions for
7445         updating reference counts.
7446         (stop_token::_Stop_state::_M_lock, stop_token::_Stop_state::_M_unlock)
7447         (stop_token::_Stop_state::_M_lock, stop_token::_Stop_state::_M_unlock)
7448         (stop_token::_Stop_state::_M_try_lock)
7449         (stop_token::_Stop_state::_M_try_lock_and_stop)
7450         (stop_token::_Stop_state::_M_do_try_lock): New member functions for
7451         managing spinlock.
7452         (stop_token::_Stop_state::_M_request_stop): Use atomic operations to
7453         read and update state. Release lock while running callbacks. Use new
7454         data members to synchronize with callback destruction.
7455         (stop_token::_Stop_state::_M_remove_callback): Likewise.
7456         (stop_token::_Stop_state::_M_register_callback): Use atomic operations
7457         to read and update state.
7458         (stop_token::_Stop_state_ref): Handle type to manage _Stop_state,
7459         replacing shared_ptr.
7460         (stop_source::stop_source(const stop_source&)): Update reference count.
7461         (stop_source::operator=(const stop_source&)): Likewise.
7462         (stop_source::~stop_source()): Likewise.
7463         (stop_source::stop_source(stop_source&&)): Define as defaulted.
7464         (stop_source::operator=(stop_source&&)): Establish postcondition on
7465         parameter.
7466         (stop_callback): Enforce preconditions on template parameter. Replace
7467         base class with data member of new _Cb_impl type.
7468         (stop_callback::stop_callback(const stop_token&, Cb&&))
7469         (stop_callback::stop_callback(stop_token&&, Cb&&)): Fix TOCTTOU race.
7470         (stop_callback::_Cb_impl): New type wrapping _Callback member and
7471         defining the _S_execute member function.
7472         * testsuite/30_threads/stop_token/stop_callback/deadlock-mt.cc: New
7473         test.
7474         * testsuite/30_threads/stop_token/stop_callback/deadlock.cc: New test.
7475         * testsuite/30_threads/stop_token/stop_callback/destroy.cc: New test.
7476         * testsuite/30_threads/stop_token/stop_callback/destructible_neg.cc:
7477         New test.
7478         * testsuite/30_threads/stop_token/stop_callback/invocable_neg.cc: New
7479         test.
7480         * testsuite/30_threads/stop_token/stop_callback/invoke.cc: New test.
7481         * testsuite/30_threads/stop_token/stop_source/assign.cc: New test.
7482         * testsuite/30_threads/stop_token/stop_token/stop_possible.cc: New
7483         test.
7484
7485         * libsupc++/compare (__detail::__3way_builtin_ptr_cmp): Use
7486         three_way_comparable_with.
7487         (__detail::__3way_cmp_with): Remove workaround for fixed bug.
7488         (compare_three_way::operator()): Remove redundant constraint from
7489         requires-clause.
7490         (__detail::_Synth3way::operator()): Use three_way_comparable_with
7491         instead of workaround.
7492         * testsuite/18_support/comparisons/object/93479.cc: Prune extra
7493         output due to simplified constraints on compare_three_way::operator().
7494
7495         PR libstdc++/93479
7496         * libsupc++/compare (__3way_builtin_ptr_cmp): Require <=> to be valid.
7497         * testsuite/18_support/comparisons/object/93479.cc: New test.
7498
7499         * testsuite/std/ranges/access/end.cc: Do not assume test_range::end()
7500         returns the same type as test_range::begin(). Add comments.
7501         * testsuite/std/ranges/access/rbegin.cc: Likewise.
7502         * testsuite/std/ranges/access/rend.cc: Likewise.
7503         * testsuite/std/ranges/range.cc: Do not assume the sentinel for
7504         test_range is the same as its iterator type.
7505         * testsuite/util/testsuite_iterators.h (test_range::sentinel): Add
7506         operator- overloads to satisfy sized_sentinel_for when the iterator
7507         satisfies random_access_iterator.
7508
7509 2020-01-28  Jonathan Wakely  <jwakely@redhat.com>
7510
7511         PR libstdc++/93470
7512         * include/bits/refwrap.h (reference_wrapper::operator()): Restrict
7513         static assertion to object types.
7514
7515         PR libstdc++/93325
7516         * acinclude.m4 (GLIBCXX_ENABLE_LIBSTDCXX_TIME): Use AC_SEARCH_LIBS for
7517         clock_gettime instead of explicit glibc version check.
7518         * configure: Regenerate.
7519
7520 2020-01-28  Martin Liska  <mliska@suse.cz>
7521
7522         PR libstdc++/93478
7523         * include/std/atomic: Fix typo.
7524         * include/std/optional: Likewise.
7525
7526 2020-01-27  Andrew Burgess  <andrew.burgess@embecosm.com>
7527
7528         * configure: Regenerate.
7529
7530 2020-01-27  Jonathan Wakely  <jwakely@redhat.com>
7531
7532         PR libstdc++/93426
7533         * include/std/span (span): Fix deduction guide.
7534         * testsuite/23_containers/span/deduction.cc: New test.
7535
7536 2020-01-24  Jonathan Wakely  <jwakely@redhat.com>
7537
7538         * libsupc++/compare (__cmp_cat::_Eq): Remove enumeration type.
7539         (__cmp_cat::_Ord::equivalent): Add enumerator.
7540         (__cmp_cat::_Ord::_Less, __cmp_cat::_Ord::_Greater): Rename to less
7541         and greater.
7542         (partial_ordering, weak_ordering, strong_ordering): Remove
7543         constructors taking __cmp_cat::_Eq parameters. Use renamed
7544         enumerators.
7545
7546 2020-01-24  Maciej W. Rozycki  <macro@wdc.com>
7547
7548         * acinclude.m4: Handle `--with-toolexeclibdir='.
7549         * Makefile.in: Regenerate.
7550         * aclocal.m4: Regenerate.
7551         * configure: Regenerate.
7552         * doc/Makefile.in: Regenerate.
7553         * include/Makefile.in: Regenerate.
7554         * libsupc++/Makefile.in: Regenerate.
7555         * po/Makefile.in: Regenerate.
7556         * python/Makefile.in: Regenerate.
7557         * src/Makefile.in: Regenerate.
7558         * src/c++11/Makefile.in: Regenerate.
7559         * src/c++17/Makefile.in: Regenerate.
7560         * src/c++98/Makefile.in: Regenerate.
7561         * src/filesystem/Makefile.in: Regenerate.
7562         * testsuite/Makefile.in: Regenerate.
7563
7564 2020-01-23  Alexandre Oliva <oliva@adacore.com>
7565
7566         * crossconfig.m4 (GLIBCXX_CHECK_MATH_DECL): Reject macros.
7567         * configure: Rebuild.
7568
7569         * testsuite/27_io/fpos/mbstate_t/1.cc: Zero-init mbstate_t.
7570
7571 2020-01-23  Jonathan Wakely  <jwakely@redhat.com>
7572
7573         PR libstdc++/91947
7574         * include/Makefile.am (${host_builddir}/largefile-config.h): Simplify
7575         rule.
7576         * include/Makefile.in: Regenerate.
7577
7578 2020-01-20  Jonathan Wakely  <jwakely@redhat.com>
7579
7580         * doc/xml/faq.xml: Fix grammar.
7581         * doc/xml/manual/appendix_contributing.xml: Improve instructions.
7582         * doc/xml/manual/spine.xml: Update copyright years.
7583         * doc/html/*: Regenerate.
7584
7585 2020-01-19  Eric S. Raymond <esr@thyrsus.com>
7586
7587         * doc/xml/faq.xml: Update for SVN -> Git transition.
7588         * doc/xml/manual/appendix_contributing.xml: Likewise.
7589         * doc/xml/manual/status_cxx1998.xml: Likewise.
7590         * doc/xml/manual/status_cxx2011.xml: Likewise.
7591         * doc/xml/manual/status_cxx2014.xml: Likewise.
7592         * doc/xml/manual/status_cxx2017.xml: Likewise.
7593         * doc/xml/manual/status_cxx2020.xml: Likewise.
7594         * doc/xml/manual/status_cxxtr1.xml: Likewise.
7595         * doc/xml/manual/status_cxxtr24733.xml: Likewise.
7596
7597 2020-01-18  Iain Sandoe  <iain@sandoe.co.uk>
7598
7599         * include/Makefile.am: Add coroutine to the std set.
7600         * include/Makefile.in: Regenerated.
7601         * include/std/coroutine: New file.
7602
7603 2020-01-17  Jonathan Wakely  <jwakely@redhat.com>
7604
7605         PR libstdc++/92376
7606         * include/bits/c++config: Only do PSTL config when the header is
7607         present, to fix freestanding.
7608         * libsupc++/new_opa.cc [!_GLIBCXX_HOSTED]: Declare allocation
7609         functions if they were detected by configure.
7610
7611 2020-01-16  Kai-Uwe Eckhardt  <kuehro@gmx.de>
7612             Matthew Bauer  <mjbauer95@gmail.com>
7613             Jonathan Wakely  <jwakely@redhat.com>
7614
7615         PR bootstrap/64271 (partial)
7616         * config/os/bsd/netbsd/ctype_base.h (ctype_base::mask): Change type
7617         to unsigned short.
7618         (ctype_base::alpha, ctype_base::digit, ctype_base::xdigit)
7619         (ctype_base::print, ctype_base::graph, ctype_base::alnum): Sync
7620         definitions with NetBSD upstream.
7621         (ctype_base::blank): Use _CTYPE_BL.
7622         * config/os/bsd/netbsd/ctype_configure_char.cc (_C_ctype_): Remove
7623         Declaration.
7624         (ctype<char>::classic_table): Use _C_ctype_tab_ instead of _C_ctype_.
7625         (ctype<char>::do_toupper, ctype<char>::do_tolower): Cast char
7626         parameters to unsigned char.
7627         * config/os/bsd/netbsd/ctype_inline.h (ctype<char>::is): Likewise.
7628
7629 2020-01-16  François Dumont  <fdumont@gcc.gnu.org>
7630
7631         PR libstdc++/91263
7632         * include/bits/hashtable.h (_Hashtable<>): Make _Equality<> friend.
7633         * include/bits/hashtable_policy.h: Include <bits/stl_algo.h>.
7634         (_Equality_base): Remove.
7635         (_Equality<>::_M_equal): Review implementation. Use
7636         std::is_permutation.
7637         * testsuite/23_containers/unordered_multiset/operators/1.cc
7638         (Hash, Equal, test02, test03): New.
7639         * testsuite/23_containers/unordered_set/operators/1.cc
7640         (Hash, Equal, test02, test03): New.
7641
7642 2020-01-15  Jonathan Wakely  <jwakely@redhat.com>
7643
7644         PR libstdc++/93267
7645         * include/bits/iterator_concepts.h (__max_diff_type, __max_size_type):
7646         Move here from <bits/range_access.h> and define using __int128 when
7647         available.
7648         (__is_integer_like, __is_signed_integer_like): Move here from
7649         <bits/range_access.h>.
7650         (weakly_incrementable): Use __is_signed_integer_like.
7651         * include/bits/range_access.h (__max_diff_type, __max_size_type)
7652         (__is_integer_like, __is_signed_integer_like): Move to
7653         <bits/iterator_concepts.h>.
7654         (__make_unsigned_like_t): Move here from <ranges>.
7655         * include/std/ranges (__make_unsigned_like_t): Move to
7656         <bits/range_access.h>.
7657         (iota_view): Replace using-directive with using-declarations.
7658         * testsuite/std/ranges/iota/93267.cc: New test.
7659         * testsuite/std/ranges/iota_view.cc: Move to new 'iota' sub-directory.
7660
7661 2020-01-13  Jonathan Wakely  <jwakely@redhat.com>
7662
7663         PR libstdc++/93244
7664         * include/bits/fs_path.h (path::generic_string<C,A>)
7665         [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Convert root-dir to forward-slash.
7666         * testsuite/27_io/filesystem/path/generic/generic_string.cc: Check
7667         root-dir is converted to forward slash in generic pathname.
7668         * testsuite/27_io/filesystem/path/generic/utf.cc: New test.
7669         * testsuite/27_io/filesystem/path/generic/wchar_t.cc: New test.
7670
7671         PR libstdc++/58605
7672         * include/bits/atomic_base.h (__cpp_lib_atomic_value_initialization):
7673         Define.
7674         (__atomic_flag_base, __atomic_base, __atomic_base<_PTp*>)
7675         (__atomic_float): Add default member initializer for C++20.
7676         * include/std/atomic (atomic): Likewise.
7677         (atomic::atomic()): Remove noexcept-specifier on default constructor.
7678         * include/std/version (__cpp_lib_atomic_value_initialization): Define.
7679         * testsuite/29_atomics/atomic/cons/assign_neg.cc: Adjust dg-error line
7680         number.
7681         * testsuite/29_atomics/atomic/cons/copy_neg.cc: Likewise.
7682         * testsuite/29_atomics/atomic/cons/value_init.cc: New test.
7683         * testsuite/29_atomics/atomic_flag/cons/value_init.cc: New test.
7684         * testsuite/29_atomics/atomic_flag/requirements/trivial.cc: Adjust
7685         expected result for is_trivially_default_constructible.
7686         * testsuite/29_atomics/atomic_float/requirements.cc: Likewise.
7687         * testsuite/29_atomics/atomic_float/value_init.cc: New test.
7688         * testsuite/29_atomics/atomic_integral/cons/assign_neg.cc: Likewise.
7689         * testsuite/29_atomics/atomic_integral/cons/copy_neg.cc: Likewise.
7690         * testsuite/29_atomics/atomic_integral/cons/value_init.cc
7691         * testsuite/29_atomics/atomic_integral/requirements/trivial.cc: Adjust
7692         expected results for is_trivially_default_constructible.
7693         * testsuite/util/testsuite_common_types.h (has_trivial_dtor): Add
7694         new test generator.
7695
7696 2020-01-10  Jonathan Wakely  <jwakely@redhat.com>
7697
7698         * testsuite/util/testsuite_iterators.h: Improve comment.
7699
7700         * testsuite/25_algorithms/equal/deque_iterators/1.cc: Don't use C++11
7701         initialization syntax.
7702
7703         PR libstdc++/92285
7704         * include/bits/streambuf_iterator.h (istreambuf_iterator): Make type
7705         of base class independent of __cplusplus value.
7706         [__cplusplus < 201103L] (istreambuf_iterator::reference): Override the
7707         type defined in the base class
7708         * testsuite/24_iterators/istreambuf_iterator/92285.cc: New test.
7709         * testsuite/24_iterators/istreambuf_iterator/requirements/
7710         base_classes.cc: Adjust expected base class for C++98.
7711
7712 2020-01-09  Olivier Hainque  <hainque@adacore.com>
7713
7714         * doc/xml/manual/appendix_contributing.xml: Document _C2
7715         as a reserved identifier, by VxWorks.
7716         * include/bits/stl_map.h: Rename _C2 template typenames as _Cmp2.
7717         * include/bits/stl_multimap.h: Likewise.
7718
7719 2020-01-09  Jonathan Wakely  <jwakely@redhat.com>
7720
7721         * include/ext/extptr_allocator.h (_ExtPtr_allocator::operator==)
7722         (_ExtPtr_allocator::operator!=): Add missing const qualifiers.
7723         * include/ext/pointer.h (readable_traits<_Pointer_adapter<S>>): Add
7724         partial specialization to disambiguate the two constrained
7725         specializations.
7726
7727         * include/experimental/type_traits (experimental::is_pod_v): Disable
7728         -Wdeprecated-declarations warnings around reference to std::is_pod.
7729         * include/std/type_traits (is_pod_v): Likewise.
7730         * testsuite/18_support/max_align_t/requirements/2.cc: Also check
7731         is_standard_layout and is_trivial. Do not check is_pod for C++20.
7732         * testsuite/20_util/is_pod/requirements/explicit_instantiation.cc:
7733         Add -Wno-deprecated for C++20.
7734         * testsuite/20_util/is_pod/requirements/typedefs.cc: Likewise.
7735         * testsuite/20_util/is_pod/value.cc: Likewise.
7736         * testsuite/experimental/type_traits/value.cc: Likewise.
7737
7738 2020-01-09  JeanHeyd "ThePhD" Meneide  <phdofthehouse@gmail.com>
7739
7740         * include/bits/c++config (_GLIBCXX20_DEPRECATED): Add new macro.
7741         * include/std/type_traits (is_pod, is_pod_v): Deprecate for C++20.
7742         * testuite/20_util/is_pod/deprecated-2a.cc: New test.
7743
7744 2020-01-09  Jonathan Wakely  <jwakely@redhat.com>
7745
7746         PR libstdc++/93205
7747         * include/bits/random.h (operator>>): Check stream operation succeeds.
7748         * include/bits/random.tcc (operator<<): Remove redundant __ostream_type
7749         typedefs.
7750         (operator>>): Remove redundant __istream_type typedefs. Check stream
7751         operations succeed.
7752         (__extract_params): New function to fill a vector from a stream.
7753         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error line.
7754
7755         PR libstdc++/93208
7756         * config/abi/pre/gnu.ver: Add new exports.
7757         * include/std/memory_resource (memory_resource::~memory_resource()):
7758         Do not define inline.
7759         (monotonic_buffer_resource::~monotonic_buffer_resource()): Likewise.
7760         * src/c++17/memory_resource.cc (memory_resource::~memory_resource()):
7761         Define.
7762         (monotonic_buffer_resource::~monotonic_buffer_resource()): Define.
7763         * testsuite/20_util/monotonic_buffer_resource/93208.cc: New test.
7764
7765 2020-01-09  François Dumont  <fdumont@gcc.gnu.org>
7766
7767         PR libstdc++/92124
7768         * include/bits/hashtable.h (_Hashtable<>::__alloc_node_gen_t): New
7769         template alias.
7770         (_Hashtable<>::__fwd_value_for): New.
7771         (_Hashtable<>::_M_assign_elements<>): Remove _NodeGenerator template
7772         parameter.
7773         (_Hashtable<>::_M_assign<>): Add _Ht template parameter.
7774         (_Hashtable<>::operator=(const _Hashtable<>&)): Adapt.
7775         (_Hashtable<>::_M_move_assign): Adapt. Replace std::move_if_noexcept
7776         with std::move.
7777         (_Hashtable<>::_Hashtable(const _Hashtable&)): Adapt.
7778         (_Hashtable<>::_Hashtable(const _Hashtable&, const allocator_type&)):
7779         Adapt.
7780         (_Hashtable<>::_Hashtable(_Hashtable&&, const allocator_type&)):
7781         Adapt.
7782         * testsuite/23_containers/unordered_set/92124.cc: New.
7783
7784 2020-01-08  Jonathan Wakely  <jwakely@redhat.com>
7785
7786         PR libstdc++/93201
7787         * src/c++17/fs_ops.cc (do_remove_all): New function implementing more
7788         detailed error reporting for remove_all. Check result of recursive
7789         call before incrementing iterator.
7790         (remove_all(const path&), remove_all(const path&, error_code&)): Use
7791         do_remove_all.
7792         * src/filesystem/ops.cc (remove_all(const path&, error_code&)): Check
7793         result of recursive call before incrementing iterator.
7794         * testsuite/27_io/filesystem/operations/remove_all.cc: Check errors
7795         are reported correctly.
7796         * testsuite/experimental/filesystem/operations/remove_all.cc: Likewise.
7797
7798 2020-01-07  Thomas Rodgers  <trodgers@redhat.com>
7799
7800         * include/std/condition_variable
7801         (condition_variable_any::wait_on): Rename to match current draft
7802         standard.
7803         (condition_variable_any::wait_on_until): Likewise.
7804         (condition_variable_any::wait_on_for): Likewise.
7805         * testsuite/30_threads/condition_variable_any/stop_token/wait_on.cc:
7806         Adjust tests to account for renamed methods.
7807
7808 2020-01-07  François Dumont  <fdumont@gcc.gnu.org>
7809
7810         PR libstdc++/92124
7811         * include/bits/stl_tree.h
7812         (_Rb_tree<>::_M_move_assign(_Rb_tree&, false_type)): Replace
7813         std::move_if_noexcept by std::move.
7814         * testsuite/23_containers/map/92124.cc: New.
7815         * testsuite/23_containers/set/92124.cc: New.
7816
7817 2020-01-06  Jonathan Wakely  <jwakely@redhat.com>
7818
7819         * include/std/stop_token (stop_token): Remove operator!= (LWG 3254).
7820         (stop_source): Likewise (LWG 3362).
7821         * testsuite/30_threads/stop_token/stop_source.cc: Test equality
7822         comparisons.
7823
7824         * include/bits/stl_algobase.h (__is_byte_iter, __min_cmp)
7825         (lexicographical_compare_three_way): Do not depend on
7826         __cpp_lib_concepts.
7827         * include/std/version (__cpp_lib_three_way_comparison): Only define
7828         when __cpp_lib_concepts is defined.
7829         * libsupc++/compare (__cpp_lib_three_way_comparison): Likewise.
7830
7831 2020-01-03  Jonathan Wakely  <jwakely@redhat.com>
7832
7833         * include/bits/stl_algobase.h (lexicographical_compare_three_way):
7834         Only define four-argument overload when __cpp_lib_concepts is defined.
7835
7836 2020-01-01  John David Anglin  <danglin@gcc.gnu.org>
7837
7838         * config/abi/post/hppa-linux-gnu/baseline_symbols.txt: Update.
7839
7840 2020-01-01  Jakub Jelinek  <jakub@redhat.com>
7841
7842         Update copyright years.
7843 \f
7844 Copyright (C) 2020 Free Software Foundation, Inc.
7845
7846 Copying and distribution of this file, with or without modification,
7847 are permitted in any medium without royalty provided the copyright
7848 notice and this notice are preserved.