libstdc++-v3/ChangeLog

   1 2020-12-12  François Dumont  <fdumont@gcc.gnu.org>
   2
   3         * include/debug/macros.h (__glibcxx_check_can_increment_range): Replace
   4         _GLIBCXX_DEBUG_VERIFY_COND_AT usage with _GLIBCXX_DEBUG_VERIFY_AT_F.
   5         (__glibcxx_check_can_decrement_range): Likewise.
   6         * testsuite/25_algorithms/copy_backward/constexpr.cc (test03): New.
   7         * testsuite/25_algorithms/copy/debug/constexpr_neg.cc: New test.
   8         * testsuite/25_algorithms/copy_backward/debug/constexpr_neg.cc: New test.
   9         * testsuite/25_algorithms/equal/constexpr_neg.cc: New test.
  10         * testsuite/25_algorithms/equal/debug/constexpr_neg.cc: New test.
  11
  12 2020-12-10  Jonathan Wakely  <jwakely@redhat.com>
  13
  14         PR libstdc++/98226
  15         * include/std/bit (__countl_one, __countr_one): Remove redundant
  16         branches.
  17
  18 2020-12-09  Jonathan Wakely  <jwakely@redhat.com>
  19
  20         * acinclude.m4 (GLIBCXX_ENABLE_LIBSTDCXX_TIME): Define NO_SLEEP
  21         if none of nanosleep, sleep and Sleep is available.
  22         * config.h.in: Regenerate.
  23         * configure: Regenerate.
  24         * include/std/thread [_GLIBCXX_NO_SLEEP] (__sleep_for): Do
  25         not declare.
  26         [_GLIBCXX_NO_SLEEP] (sleep_for, sleep_until): Do not
  27         define.
  28         * src/c++11/thread.cc [_GLIBCXX_NO_SLEEP] (__sleep_for): Do
  29         not define.
  30
  31 2020-12-08  Jason Merrill  <jason@redhat.com>
  32
  33         PR c++/96299
  34         * testsuite/18_support/comparisons/algorithms/partial_order.cc:
  35         One more line needs to use VERIFY instead of static_assert.
  36
  37 2020-12-08  Jonathan Wakely  <jwakely@redhat.com>
  38
  39         * doc/xml/manual/appendix_contributing.xml: Use consistent
  40         indentation.
  41         * doc/html/manual/source_code_style.html: Regenerate.
  42
  43 2020-12-05  Iain Sandoe  <iain@sandoe.co.uk>
  44
  45         PR target/97865
  46         * configure: Regenerate.
  47
  48 2020-12-04  Jakub Jelinek  <jakub@redhat.com>
  49
  50         PR c++/80780
  51         * testsuite/18_support/source_location/1.cc (main): Adjust for
  52         __builtin_source_location using __PRETTY_FUNCTION__-like names instead
  53         __FUNCTION__-like.
  54         * testsuite/18_support/source_location/consteval.cc (main): Likewise.
  55
  56 2020-12-03  Martin Sebor  <msebor@redhat.com>
  57
  58         * testsuite/ext/vstring/modifiers/clear/56166.cc: Suppress a false
  59         positive warning.
  60
  61 2020-12-03  Jonathan Wakely  <jwakely@redhat.com>
  62
  63         * testsuite/26_numerics/bit/bit.cast/bit_cast.cc: Remove stray
  64         word from copy&paste.
  65         * testsuite/26_numerics/bit/bit.cast/version.cc: Likewise.
  66
  67 2020-12-03  Jonathan Wakely  <jwakely@redhat.com>
  68
  69         * doc/xml/manual/status_cxx2020.xml: Update C++20 status.
  70         * doc/html/*: Regenerate.
  71
  72 2020-12-03  JeanHeyd Meneide  <phdofthehouse@gmail.com>
  73
  74         * doc/doxygen/user.cfg.in (INPUT): Add <source_location>.
  75         * include/Makefile.am: Add <source_location>.
  76         * include/Makefile.in: Regenerate.
  77         * include/std/version (__cpp_lib_source_location): Define.
  78         * include/std/source_location: New file.
  79         * testsuite/18_support/source_location/1.cc: New test.
  80         * testsuite/18_support/source_location/consteval.cc: New test.
  81         * testsuite/18_support/source_location/srcloc.h: New test.
  82         * testsuite/18_support/source_location/version.cc: New test.
  83
  84 2020-12-03  Jonathan Wakely  <jwakely@redhat.com>
  85
  86         PR libstdc++/93121
  87         * include/std/bit (__cpp_lib_bit_cast, bit_cast): Define.
  88         * include/std/version (__cpp_lib_bit_cast): Define.
  89         * testsuite/26_numerics/bit/bit.cast/bit_cast.cc: New test.
  90         * testsuite/26_numerics/bit/bit.cast/version.cc: New test.
  91
  92 2020-12-03  Jonathan Wakely  <jwakely@redhat.com>
  93
  94         * config/abi/post/powerpc-linux-gnu/baseline_symbols.txt:
  95         Update.
  96         * config/abi/post/powerpc64-linux-gnu/32/baseline_symbols.txt:
  97         Update.
  98
  99 2020-12-03  Jonathan Wakely  <jwakely@redhat.com>
 100
 101         * include/std/array (array::operator[](size_t) const, array::front() const)
 102         (array::back() const) [__cplusplus == 201103]: Disable
 103         assertions.
 104         * testsuite/23_containers/array/element_access/constexpr_element_access.cc:
 105         Check for correct values.
 106         * testsuite/23_containers/array/tuple_interface/get_neg.cc:
 107         Adjust dg-error line numbers.
 108         * testsuite/23_containers/array/debug/constexpr_c++11.cc: New test.
 109
 110 2020-12-02  Jonathan Wakely  <jwakely@redhat.com>
 111
 112         PR libstdc++/65480
 113         PR libstdc++/68735
 114         * python/libstdcxx/v6/printers.py (function_pointer_to_name):
 115         New helper function to get the name of a function from its
 116         address.
 117         (StdExpAnyPrinter.__init__): Use it.
 118
 119 2020-12-02  Jonathan Wakely  <jwakely@redhat.com>
 120
 121         * testsuite/lib/dg-options.exp (add_options_for_libatomic):
 122         Replace powerpc-ibm-aix* and powerpc*-*-darwin* with check for
 123         powerpc && ilp32.
 124
 125 2020-12-02  Jonathan Wakely  <jwakely@redhat.com>
 126
 127         * testsuite/27_io/basic_istream/ignore/char/94749.cc: Add
 128         dg-timeout-factor for ilp32 targets.
 129         * testsuite/27_io/basic_istream/ignore/wchar_t/94749.cc:
 130         Likewise.
 131
 132 2020-12-02  Jonathan Wakely  <jwakely@redhat.com>
 133
 134         * include/ext/rope (rope::_S_concat_char_iter)
 135         (rope::_S_destr_concat_char_iter): Add allocator parameter.
 136         (rope::push_back, rope::append, rope::insert, operator+):
 137         Pass allocator.
 138         * include/ext/ropeimpl.h (rope::_S_concat_char_iter)
 139         (rope::_S_destr_concat_char_iter): Add allocator parameter
 140         and use it.
 141         (_Rope_char_ref_proxy::operator=(_CharT)): Pass allocator.
 142
 143 2020-12-02  Jonathan Wakely  <jwakely@redhat.com>
 144
 145         * include/ext/rope: Fix indentation of access specifiers.
 146
 147 2020-12-02  Jonathan Wakely  <jwakely@redhat.com>
 148
 149         * include/bits/atomic_timed_wait.h: Use #if instead of #ifdef.
 150         * include/bits/semaphore_base.h: Likewise.
 151         * include/std/version: Remove trailing whitespace.
 152
 153 2020-12-02  Jonathan Wakely  <jwakely@redhat.com>
 154
 155         * python/libstdcxx/v6/printers.py (StdExpPathPrinter): Store the
 156         name of the type and pass it to the iterator.
 157         (StdPathPrinter): Likewise.
 158         * testsuite/libstdc++-prettyprinters/filesystem-ts.cc: New test.
 159
 160 2020-12-01  Thomas Rodgers  <trodgers@redhat.com>
 161
 162         * include/bits/atomic_base.h: Replace usage of
 163         _GLIBCXX_HAVE_ATOMIC_WAIT with __cpp_lib_atomic_wait.
 164         * include/bits/atomic_timed_wait.h: Likewise.
 165         * include/bits/atomic_wait.h: Define __cpp_lib_atomic_wait
 166         feature test macro.
 167         * include/bits/semaphore_base.h: Replace usage of
 168         _GLIBCXX_HAVE_ATOMIC_WAIT with __cpp_lib_atomic_wait.
 169         * include/std/atomic: Likewise.
 170         * include/std/latch: Likewise.
 171         * include/std/semaphore: Likewise.
 172         * include/std/version: Define __cpp_lib_atomic wait
 173         feature test macro and replace usage of
 174         _GLIBCXX_HAVE_ATOMIC_WAIT.
 175         * testsuite/29_atomics/atomic/wait_notify/1.cc: New test.
 176         * testsuite/29_atomics/atomic/wait_notify/2.cc: Likewise.
 177
 178 2020-12-01  Michael Weghorn  <m.weghorn@posteo.de>
 179
 180         * python/libstdcxx/v6/printers.py (StdBitIteratorPrinter)
 181         (StdBitReferencePrinter): Add pretty-printers for
 182         _Bit_reference, _Bit_iterator and _Bit_const_iterator.
 183         * testsuite/libstdc++-prettyprinters/simple.cc: Test
 184         std::_Bit_reference, std::_Bit_iterator and
 185         std::_Bit_const_iterator.
 186         * testsuite/libstdc++-prettyprinters/simple11.cc: Likewise.
 187
 188 2020-12-01  Jonathan Wakely  <jwakely@redhat.com>
 189
 190         * include/bits/c++config (_GLIBCXX_HAS_BUILTIN): Define macro to
 191         work around different implementations of __has_builtin.
 192         (_GLIBCXX_HAVE_BUILTIN_HAS_UNIQ_OBJ_REP)
 193         (_GLIBCXX_HAVE_BUILTIN_IS_AGGREGATE)
 194         (_GLIBCXX_HAVE_BUILTIN_IS_CONSTANT_EVALUATED)
 195         (_GLIBCXX_HAVE_BUILTIN_IS_SAME, _GLIBCXX_HAVE_BUILTIN_LAUNDER):
 196         Define using _GLIBCXX_HAS_BUILTIN.
 197
 198 2020-12-01  Jonathan Wakely  <jwakely@redhat.com>
 199
 200         * testsuite/27_io/basic_istream/get/char/lwg3464.cc: Add
 201         dg-timeout-factor directive.
 202         * testsuite/27_io/basic_istream/get/wchar_t/lwg3464.cc:
 203         Likewise.
 204
 205 2020-12-01  Jonathan Wakely  <jwakely@redhat.com>
 206
 207         PR libstdc++/98003
 208         * testsuite/27_io/basic_syncbuf/sync_ops/1.cc: Add options for
 209         libatomic.
 210
 211 2020-11-30  Jonathan Wakely  <jwakely@redhat.com>
 212
 213         * doc/doxygen/user.cfg.in (INPUT): Add <latch> and <semaphore>.
 214
 215 2020-11-30  Jonathan Wakely  <jwakely@redhat.com>
 216
 217         * testsuite/lib/libstdc++.exp (libstdc++_init): Reduce
 218         default tool_timeout to 360.
 219
 220 2020-11-30  Jonathan Wakely  <jwakely@redhat.com>
 221
 222         * testsuite/20_util/specialized_algorithms/pstl/*: Add
 223         dg-timeout-factor.
 224         * testsuite/25_algorithms/pstl/*: Likewise.
 225         * testsuite/26_numerics/pstl/*: Likewise.
 226         * testsuite/28_regex/*: Likewise.
 227
 228 2020-11-29  John David Anglin  <danglin@gcc.gnu.org>
 229
 230         * configure: Regenerate.
 231
 232 2020-11-27  Jonathan Wakely  <jwakely@redhat.com>
 233
 234         * testsuite/lib/libstdc++.exp (v3_try_preprocess): Define
 235         new proc to preprocess a chunk of code.
 236         (v3_check_preprocessor_condition): Define new proc to test
 237         a preprocessor condition depending on GCC or libstdc++ macros.
 238         (check_v3_target_debug_mode, check_v3_target_normal_mode):
 239         Use v3_try_preprocess.
 240         (check_v3_target_normal_namespace)
 241         (check_v3_target_parallel_mode, check_v3_target_cstdint)
 242         (check_v3_target_cmath, check_v3_target_atomic_builtins)
 243         (check_v3_target_gthreads, check_v3_target_gthreads_timed)
 244         (check_v3_target_sleep, check_v3_target_sched_yield)
 245         (check_v3_target_string_conversions, check_v3_target_swprintf)
 246         (check_v3_target_binary_io, check_v3_target_nprocs): Use
 247         v3_check_preprocessor_condition.
 248         (check_effective_target_cxx11): Likewise.
 249         (check_effective_target_random_device): Likewise.
 250         (check_effective_target_tbb-backend): Likewise.
 251         (check_effective_target_futex): Likewise.
 252         (check_v3_target_little_endian) Call check_effective_target_le.
 253         (check_effective_target_atomic-builtins): New proc to define
 254         new effective-target keyword.
 255         (check_effective_target_gthreads-timed): Likewise.
 256
 257 2020-11-27  Jonathan Wakely  <jwakely@redhat.com>
 258
 259         * testsuite/27_io/filesystem/operations/absolute.cc: Avoid
 260         -Wrange-loop-construct warning.
 261         * testsuite/27_io/filesystem/path/append/source.cc: Likewise.
 262         * testsuite/27_io/filesystem/path/assign/copy.cc: Likewise.
 263         * testsuite/27_io/filesystem/path/compare/path.cc: Likewise.
 264         * testsuite/27_io/filesystem/path/construct/copy.cc: Likewise.
 265         * testsuite/27_io/filesystem/path/decompose/extension.cc:
 266         Likewise.
 267         * testsuite/27_io/filesystem/path/decompose/filename.cc:
 268         Likewise.
 269         * testsuite/27_io/filesystem/path/decompose/parent_path.cc:
 270         Likewise.
 271         * testsuite/27_io/filesystem/path/decompose/relative_path.cc:
 272         Likewise.
 273         * testsuite/27_io/filesystem/path/decompose/root_directory.cc:
 274         Likewise.
 275         * testsuite/27_io/filesystem/path/decompose/root_path.cc:
 276         Likewise.
 277         * testsuite/27_io/filesystem/path/itr/traversal.cc: Likewise.
 278         * testsuite/27_io/filesystem/path/modifiers/remove_filename.cc:
 279         Likewise.
 280         * testsuite/27_io/filesystem/path/modifiers/replace_extension.cc:
 281         Likewise.
 282         * testsuite/27_io/filesystem/path/modifiers/replace_filename.cc:
 283         Likewise.
 284         * testsuite/27_io/filesystem/path/nonmember/append.cc: Likewise.
 285         * testsuite/27_io/filesystem/path/nonmember/cmp.cc: Likewise.
 286         * testsuite/27_io/filesystem/path/nonmember/cmp_c++20.cc:
 287         Likewise.
 288         * testsuite/27_io/filesystem/path/nonmember/hash_value.cc:
 289         Likewise.
 290         * testsuite/27_io/filesystem/path/query/has_extension.cc:
 291         Likewise.
 292         * testsuite/27_io/filesystem/path/query/has_filename.cc:
 293         Likewise.
 294         * testsuite/27_io/filesystem/path/query/has_parent_path.cc:
 295         Likewise.
 296         * testsuite/27_io/filesystem/path/query/has_relative_path.cc:
 297         Likewise.
 298         * testsuite/27_io/filesystem/path/query/has_root_directory.cc:
 299         Likewise.
 300         * testsuite/27_io/filesystem/path/query/has_root_name.cc:
 301         Likewise.
 302         * testsuite/27_io/filesystem/path/query/has_root_path.cc:
 303         Likewise.
 304         * testsuite/27_io/filesystem/path/query/has_stem.cc: Likewise.
 305         * testsuite/27_io/filesystem/path/query/is_relative.cc: Likewise.
 306         * testsuite/experimental/filesystem/operations/absolute.cc:
 307         Likewise.
 308         * testsuite/experimental/filesystem/path/assign/copy.cc: Likewise.
 309         * testsuite/experimental/filesystem/path/compare/path.cc:
 310         Likewise.
 311         * testsuite/experimental/filesystem/path/construct/copy.cc:
 312         Likewise.
 313         * testsuite/experimental/filesystem/path/decompose/extension.cc:
 314         Likewise.
 315         * testsuite/experimental/filesystem/path/decompose/filename.cc:
 316         Likewise.
 317         * testsuite/experimental/filesystem/path/decompose/parent_path.cc:
 318         Likewise.
 319         * testsuite/experimental/filesystem/path/decompose/relative_path.cc:
 320         Likewise.
 321         * testsuite/experimental/filesystem/path/decompose/root_directory.cc:
 322         Likewise.
 323         * testsuite/experimental/filesystem/path/decompose/root_path.cc:
 324         Likewise.
 325         * testsuite/experimental/filesystem/path/itr/traversal.cc:
 326         Likewise.
 327         * testsuite/experimental/filesystem/path/modifiers/remove_filename.cc:
 328         Likewise.
 329         * testsuite/experimental/filesystem/path/modifiers/replace_extension.cc:
 330         Likewise.
 331         * testsuite/experimental/filesystem/path/modifiers/replace_filename.cc:
 332         Likewise.
 333         * testsuite/experimental/filesystem/path/nonmember/hash_value.cc:
 334         Likewise.
 335         * testsuite/experimental/filesystem/path/query/has_extension.cc:
 336         Likewise.
 337         * testsuite/experimental/filesystem/path/query/has_filename.cc:
 338         Likewise.
 339         * testsuite/experimental/filesystem/path/query/has_parent_path.cc:
 340         Likewise.
 341         * testsuite/experimental/filesystem/path/query/has_relative_path.cc:
 342         Likewise.
 343         * testsuite/experimental/filesystem/path/query/has_root_directory.cc:
 344         Likewise.
 345         * testsuite/experimental/filesystem/path/query/has_root_name.cc:
 346         Likewise.
 347         * testsuite/experimental/filesystem/path/query/has_root_path.cc:
 348         Likewise.
 349         * testsuite/experimental/filesystem/path/query/has_stem.cc:
 350         Likewise.
 351         * testsuite/experimental/filesystem/path/query/is_relative.cc:
 352         Likewise.
 353
 354 2020-11-27  Jonathan Wakely  <jwakely@redhat.com>
 355
 356         * src/c++98/locale.cc (locale::facet::_S_get_c_locale()):
 357         Revert change to use __is_single_threaded.
 358         * src/c++98/locale_init.cc (locale::_S_initialize()):
 359         Likewise.
 360
 361 2020-11-26  Jonathan Wakely  <jwakely@redhat.com>
 362
 363         * include/bits/atomic_wait.h (_GLIBCXX_HAVE_ATOMIC_WAIT):
 364         Define.
 365         * include/bits/atomic_base.h: Check _GLIBCXX_HAVE_ATOMIC_WAIT.
 366         * include/bits/atomic_timed_wait.h: Likewise.
 367         * include/bits/semaphore_base.h: Likewise.
 368         * include/std/atomic: Likewise.
 369         * include/std/latch: Likewise.
 370         * include/std/semaphore: Likewise.
 371
 372 2020-11-26  Jonathan Wakely  <jwakely@redhat.com>
 373
 374         * include/std/latch: Depend on _GLIBCXX_HAS_GTHREADS and
 375         _GLIBCXX_HAVE_LINUX_FUTEX.
 376         * include/std/version (__cpp_lib_latch): Define conditionally.
 377
 378 2020-11-26  Jonathan Wakely  <jwakely@redhat.com>
 379
 380         * testsuite/lib/libstdc++.exp (check_effective_target_gthreads):
 381         Call check_v3_target_gthreads not check_v3_target_gthreads_timed.
 382
 383 2020-11-26  Jonathan Wakely  <jwakely@redhat.com>
 384
 385         * testsuite/28_regex/algorithms/regex_match/basic/string_range_01_03.cc:
 386         Add dg-timeout-factor directive.
 387         * testsuite/28_regex/algorithms/regex_match/cstring_bracket_01.cc:
 388         Likewise.
 389         * testsuite/28_regex/algorithms/regex_match/ecma/char/backref.cc:
 390         Likewise.
 391         * testsuite/28_regex/algorithms/regex_match/ecma/wchar_t/63199.cc:
 392         Likewise.
 393         * testsuite/28_regex/algorithms/regex_match/ecma/wchar_t/anymatcher.cc:
 394         Likewise.
 395         * testsuite/28_regex/algorithms/regex_match/ecma/wchar_t/cjk_match.cc:
 396         Likewise.
 397         * testsuite/28_regex/algorithms/regex_match/ecma/wchar_t/hex.cc:
 398         Likewise.
 399         * testsuite/28_regex/algorithms/regex_match/extended/wstring_locale.cc:
 400         Likewise.
 401         * testsuite/28_regex/algorithms/regex_search/61720.cc: Likewise.
 402         * testsuite/28_regex/algorithms/regex_search/ecma/assertion.cc:
 403         Likewise.
 404         * testsuite/28_regex/algorithms/regex_search/ecma/string_01.cc:
 405         Likewise.
 406         * testsuite/28_regex/basic_regex/ctors/deduction.cc: Likewise.
 407
 408 2020-11-26  Jonathan Wakely  <jwakely@redhat.com>
 409
 410         * testsuite/lib/libstdc++.exp (libstdc++_init): Only set
 411         tool_timeout if it hasn't been set by the user already.
 412
 413 2020-11-26  Jonathan Wakely  <jwakely@redhat.com>
 414
 415         PR libstdc++/97936
 416         * testsuite/29_atomics/atomic/wait_notify/bool.cc: Fix missed
 417         notifications by making the new thread wait until the parent
 418         thread is waiting on the condition variable.
 419         * testsuite/29_atomics/atomic/wait_notify/pointers.cc: Likewise.
 420         * testsuite/29_atomics/atomic_flag/wait_notify/1.cc: Likewise.
 421         * testsuite/29_atomics/atomic_ref/wait_notify.cc: Likewise.
 422
 423 2020-11-26  Jonathan Wakely  <jwakely@redhat.com>
 424
 425         * testsuite/18_support/96817.cc: Use new effective-target
 426         keywords to select supported targets more effectively.
 427         * testsuite/30_threads/call_once/66146.cc: Likewise.
 428         * testsuite/lib/libstdc++.exp (check_effective_target_futex):
 429         Define new proc.
 430         (check_effective_target_gthreads): Define new proc to replace
 431         dg-require-gthreads.
 432
 433 2020-11-26  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
 434
 435         * acinclude.m4 (GLIBCXX_ENABLE_LIBSTDCXX_TIME): Remove libposix4
 436         references.
 437         <solaris*>: Don't use -lrt any longer.
 438         * configure: Regenerate.
 439         * doc/xml/manual/configure.xml (--enable-libstdcxx-time=OPTION):
 440         Remove libposix4 reference.
 441
 442 2020-11-26  Jonathan Wakely  <jwakely@redhat.com>
 443
 444         PR libstdc++/98001
 445         * testsuite/ext/stdio_filebuf/char/79820.cc: Do not pass invalid
 446         FILE* to constructor.
 447
 448 2020-11-26  Jonathan Wakely  <jwakely@redhat.com>
 449
 450         * include/precompiled/stdc++.h: Add new headers.
 451         * include/std/stop_token: Include <semaphore> unconditionally.
 452
 453 2020-11-25  Jonathan Wakely  <jwakely@redhat.com>
 454
 455         * include/bits/atomic_timed_wait.h (__cond_wait_until): Do not
 456         perform redundant conversions to the same clock.
 457
 458 2020-11-25  Jonathan Wakely  <jwakely@redhat.com>
 459
 460         * include/bits/atomic_timed_wait.h (__cond_wait_until_impl):
 461         Do not define when _GLIBCXX_HAVE_LINUX_FUTEX is defined. Use
 462         __condvar and mutex instead of __gthread_cond_t and
 463         unique_lock<mutex>.
 464         (__cond_wait_until): Likewise. Fix test for return value of
 465         __cond_wait_until_impl.
 466         (__timed_waiters::_M_do_wait_until): Use __condvar instead
 467         of __gthread_cond_t.
 468         * include/bits/atomic_wait.h: Remove <bits/unique_lock.h>
 469         include. Only include <bits/std_mutex.h> if not using futexes.
 470         (__platform_wait_max_value): Remove unused variable.
 471         (__waiters::lock_t): Use lock_guard instead of unique_lock.
 472         (__waiters::_M_cv): Use __condvar instead of __gthread_cond_t.
 473         (__waiters::_M_do_wait(__platform_wait_t)): Likewise.
 474         (__waiters::_M_notify()): Likewise. Use notify_one() if not
 475         asked to notify all.
 476         * include/bits/std_mutex.h (__condvar): New type.
 477         * include/std/condition_variable (condition_variable::_M_cond)
 478         (condition_variable::wait_until): Use __condvar instead of
 479         __gthread_cond_t.
 480         * src/c++11/condition_variable.cc (condition_variable): Define
 481         default constructor and destructor as defaulted.
 482         (condition_variable::wait, condition_variable::notify_one)
 483         (condition_variable::notify_all): Forward to corresponding
 484         member function of __condvar.
 485
 486 2020-11-25  Jonathan Wakely  <jwakely@redhat.com>
 487
 488         PR libstdc++/97936
 489         * testsuite/29_atomics/atomic/wait_notify/bool.cc: Re-eneable
 490         test.
 491         * testsuite/29_atomics/atomic/wait_notify/generic.cc: Likewise.
 492         * testsuite/29_atomics/atomic/wait_notify/pointers.cc: Likewise.
 493         * testsuite/29_atomics/atomic_flag/wait_notify/1.cc: Likewise.
 494         * testsuite/29_atomics/atomic_float/wait_notify.cc: Likewise.
 495         * testsuite/29_atomics/atomic_integral/wait_notify.cc: Likewise.
 496         * testsuite/util/atomic/wait_notify_util.h: Fix missed
 497         notifications by making the new thread wait until the parent
 498         thread is waiting on the condition variable.
 499
 500 2020-11-25  Jonathan Wakely  <jwakely@redhat.com>
 501
 502         PR libstdc++/97935
 503         * include/bits/iterator_concepts.h (__detail::__iter_without_category):
 504         New helper concept.
 505         (__iterator_traits::__cat): Use __detail::__iter_without_category.
 506         * testsuite/24_iterators/associated_types/iterator.traits.cc: New test.
 507
 508 2020-11-25  Jonathan Wakely  <jwakely@redhat.com>
 509
 510         * testsuite/17_intro/names.cc: Do not test 'v' on AIX.
 511
 512 2020-11-25  Jonathan Wakely  <jwakely@redhat.com>
 513
 514         PR libstdc++/97936
 515         * include/bits/atomic_wait.h (__platform_wait): Check errno,
 516         not just the value of EAGAIN.
 517         (__waiters::__waiters()): Fix name of data member.
 518
 519 2020-11-25  Jonathan Wakely  <jwakely@redhat.com>
 520
 521         PR libstdc++/97936
 522         * include/bits/atomic_wait.h (__platform_wait): Return if futex
 523         sets EAGAIN.
 524         * testsuite/30_threads/latch/3.cc: Re-enable test.
 525         * testsuite/30_threads/semaphore/try_acquire_until.cc: Likewise.
 526
 527 2020-11-24  Jonathan Wakely  <jwakely@redhat.com>
 528
 529         PR libstdc++/97936
 530         PR libstdc++/97944
 531         * testsuite/29_atomics/atomic_integral/wait_notify.cc: Disable.
 532         Do not require pthreads, but add -pthread when appropriate.
 533         * testsuite/30_threads/jthread/95989.cc: Likewise.
 534         * testsuite/30_threads/latch/3.cc: Likewise.
 535         * testsuite/30_threads/semaphore/try_acquire_until.cc: Likewise.
 536
 537 2020-11-24  Jonathan Wakely  <jwakely@redhat.com>
 538
 539         * testsuite/30_threads/jthread/95989.cc: Run all three test
 540         functions, not just the first one twice.
 541
 542 2020-11-24  Jonathan Wakely  <jwakely@redhat.com>
 543
 544         PR libstdc++/67791
 545         * src/c++11/thread.cc (thread::_M_start_thread(_State_ptr, void (*)())):
 546         Check that gthreads is available before calling __gthread_create.
 547
 548 2020-11-24  Jonathan Wakely  <jwakely@redhat.com>
 549
 550         * src/c++98/locale.cc (locale::facet::_S_get_c_locale())
 551         (locale::id::_M_id() const): Use __is_single_threaded.
 552         * src/c++98/locale_init.cc (locale::_S_initialize()):
 553         Likewise.
 554
 555 2020-11-23  Jonathan Wakely  <jwakely@redhat.com>
 556
 557         * include/bits/semaphore_base.h
 558         (__platform_semaphore::_M_try_acquire_until): Fix type of
 559         variable.
 560
 561 2020-11-23  Stephan Bergmann  <sbergman@redhat.com>
 562
 563         * include/bits/atomic_wait.h (__thread_relax, __thread_yield):
 564         Add 'inline'.
 565
 566 2020-11-23  Jonathan Wakely  <jwakely@redhat.com>
 567
 568         * acinclude.m4 (GLIBCXX_CHECK_GTHREADS): Check for
 569         * config.h.in: Regenerate.
 570         * configure: Regenerate.
 571         * include/bits/semaphore_base.h (_GLIBCXX_HAVE_POSIX_SEMAPHORE):
 572         Check autoconf macro instead of defining it here.
 573
 574 2020-11-23  Jonathan Wakely  <jwakely@redhat.com>
 575
 576         * include/bits/atomic_wait.h: Do not define anything unless
 577         gthreads or futexes are available.
 578         * include/bits/atomic_timed_wait.h: Likewise.
 579         * include/bits/semaphore_base.h: Likewise.
 580         * include/std/semaphore: Likewise.
 581         * include/bits/atomic_base.h (atomic_flag::wait)
 582         (atomic_flag::notify_one, atomic_flag::notify_all)
 583         (__atomic_base<I>::wait, __atomic_base<I>::notify_one)
 584         (__atomic_base<I>::notify_all, __atomic_base<P*>::wait)
 585         (__atomic_base<P*>::notify_one, __atomic_base<P*>::notify_all)
 586         (__atomic_impl::wait, __atomic_impl::notify_one)
 587         (__atomic_impl::notify_all, __atomic_float::wait)
 588         (__atomic_float::notify_one, __atomic_float::notify_all)
 589         (__atomic_ref::wait, __atomic_ref::notify_one)
 590         (__atomic_ref::notify_all): Only define if gthreads or futexes
 591         are available.
 592         * include/std/atomic (atomic::wait, atomic::notify_one)
 593         (atomic::notify_all): Likewise.
 594         * include/std/version (__cpp_lib_semaphore): Define
 595         conditionally.
 596
 597 2020-11-23  Jonathan Wakely  <jwakely@redhat.com>
 598
 599         PR libstdc++/97948
 600         * testsuite/29_atomics/atomic_float/wait_notify.cc: Add options
 601         for libatomic.
 602         * testsuite/29_atomics/atomic_integral/wait_notify.cc: Likewise.
 603         * testsuite/29_atomics/atomic_ref/wait_notify.cc: Likewise.
 604
 605 2020-11-21  Jonathan Wakely  <jwakely@redhat.com>
 606
 607         * include/bits/atomic_base.h (atomic_flag::wait): Use correct
 608         type for __atomic_wait call.
 609         * include/bits/atomic_timed_wait.h (__atomic_wait_until): Check
 610         _GLIBCXX_HAVE_LINUX_FUTEX.
 611         * include/bits/atomic_wait.h (__atomic_notify): Likewise.
 612         * include/bits/semaphore_base.h (_GLIBCXX_HAVE_POSIX_SEMAPHORE):
 613         Only define if SEM_VALUE_MAX or _POSIX_SEM_VALUE_MAX is defined.
 614         * testsuite/29_atomics/atomic/wait_notify/bool.cc: Disable on
 615         non-linux targes.
 616         * testsuite/29_atomics/atomic/wait_notify/generic.cc: Likewise.
 617         * testsuite/29_atomics/atomic/wait_notify/pointers.cc: Likewise.
 618         * testsuite/29_atomics/atomic_flag/wait_notify/1.cc: Likewise.
 619         * testsuite/29_atomics/atomic_float/wait_notify.cc: Likewise.
 620
 621 2020-11-20  Thomas Rodgers  <trodgers@redhat.com>
 622
 623         * include/Makefile.am (bits_headers): Add new header.
 624         * include/Makefile.in: Regenerate.
 625         * include/bits/atomic_base.h (__atomic_flag::wait): Define.
 626         (__atomic_flag::notify_one): Likewise.
 627         (__atomic_flag::notify_all): Likewise.
 628         (__atomic_base<_Itp>::wait): Likewise.
 629         (__atomic_base<_Itp>::notify_one): Likewise.
 630         (__atomic_base<_Itp>::notify_all): Likewise.
 631         (__atomic_base<_Ptp*>::wait): Likewise.
 632         (__atomic_base<_Ptp*>::notify_one): Likewise.
 633         (__atomic_base<_Ptp*>::notify_all): Likewise.
 634         (__atomic_impl::wait): Likewise.
 635         (__atomic_impl::notify_one): Likewise.
 636         (__atomic_impl::notify_all): Likewise.
 637         (__atomic_float<_Fp>::wait): Likewise.
 638         (__atomic_float<_Fp>::notify_one): Likewise.
 639         (__atomic_float<_Fp>::notify_all): Likewise.
 640         (__atomic_ref<_Tp>::wait): Likewise.
 641         (__atomic_ref<_Tp>::notify_one): Likewise.
 642         (__atomic_ref<_Tp>::notify_all): Likewise.
 643         (atomic_wait<_Tp>): Likewise.
 644         (atomic_wait_explicit<_Tp>): Likewise.
 645         (atomic_notify_one<_Tp>): Likewise.
 646         (atomic_notify_all<_Tp>): Likewise.
 647         * include/bits/atomic_wait.h: New file.
 648         * include/bits/atomic_timed_wait.h: New file.
 649         * include/bits/semaphore_base.h: New file.
 650         * include/std/atomic (atomic<bool>::wait): Define.
 651         (atomic<bool>::wait_one): Likewise.
 652         (atomic<bool>::wait_all): Likewise.
 653         (atomic<_Tp>::wait): Likewise.
 654         (atomic<_Tp>::wait_one): Likewise.
 655         (atomic<_Tp>::wait_all): Likewise.
 656         (atomic<_Tp*>::wait): Likewise.
 657         (atomic<_Tp*>::wait_one): Likewise.
 658         (atomic<_Tp*>::wait_all): Likewise.
 659         * include/std/latch: New file.
 660         * include/std/semaphore: New file.
 661         * include/std/version: Add __cpp_lib_semaphore and
 662         __cpp_lib_latch defines.
 663         * testsuite/29_atomics/atomic/wait_notify/bool.cc: New test.
 664         * testsuite/29_atomics/atomic/wait_notify/pointers.cc: Likewise.
 665         * testsuite/29_atomics/atomic/wait_notify/generic.cc: Liekwise.
 666         * testsuite/29_atomics/atomic_flag/wait_notify/1.cc: Likewise.
 667         * testsuite/29_atomics/atomic_float/wait_notify.cc: Likewise.
 668         * testsuite/29_atomics/atomic_integral/wait_notify.cc: Likewise.
 669         * testsuite/29_atomics/atomic_ref/wait_notify.cc: Likewise.
 670         * testsuite/30_threads/semaphore/1.cc: New test.
 671         * testsuite/30_threads/semaphore/2.cc: Likewise.
 672         * testsuite/30_threads/semaphore/least_max_value_neg.cc: Likewise.
 673         * testsuite/30_threads/semaphore/try_acquire.cc: Likewise.
 674         * testsuite/30_threads/semaphore/try_acquire_for.cc: Likewise.
 675         * testsuite/30_threads/semaphore/try_acquire_posix.cc: Likewise.
 676         * testsuite/30_threads/semaphore/try_acquire_until.cc: Likewise.
 677         * testsuite/30_threads/latch/1.cc: New test.
 678         * testsuite/30_threads/latch/2.cc: New test.
 679         * testsuite/30_threads/latch/3.cc: New test.
 680         * testsuite/util/atomic/wait_notify_util.h: New File.
 681
 682 2020-11-20  François Dumont  <fdumont@gcc.gnu.org>
 683
 684         PR libstdc++/83938
 685         * include/bits/stl_tempbuf.h (get_temporary_buffer): Change __len
 686         computation in the loop to avoid truncation.
 687         * include/bits/stl_algo.h:
 688         (__inplace_merge): Take temporary buffer length from smallest range.
 689         (__stable_sort): Limit temporary buffer length.
 690         * testsuite/25_algorithms/inplace_merge/1.cc (test4): New.
 691         * testsuite/performance/25_algorithms/stable_sort.cc: Test stable_sort
 692         under different heap memory conditions.
 693         * testsuite/performance/25_algorithms/inplace_merge.cc: New test.
 694
 695 2020-11-20  François Dumont  <fdumont@gcc.gnu.org>
 696
 697         * include/bits/move.h (_GLIBCXX_FWDREF): New.
 698         * include/bits/stl_tree.h: Adapt to use latter.
 699         (_Rb_tree<>::_M_clone_node): Add _MoveValue template parameter.
 700         (_Rb_tree<>::_M_mbegin): New.
 701         (_Rb_tree<>::_M_begin): Use latter.
 702         (_Rb_tree<>::_M_copy): Add _MoveValues template parameter.
 703         * testsuite/23_containers/map/allocator/move_cons.cc: New test.
 704         * testsuite/23_containers/multimap/allocator/move_cons.cc: New test.
 705         * testsuite/23_containers/multiset/allocator/move_cons.cc: New test.
 706         * testsuite/23_containers/set/allocator/move_cons.cc: New test.
 707
 708 2020-11-20  Jonathan Wakely  <jwakely@redhat.com>
 709
 710         PR libstdc++/92546
 711         * include/std/regex (pmr::smatch, pmr::wsmatch): Declare using
 712         underlying __normal_iterator type, not nested typedef
 713         basic_string::const_iterator.
 714
 715 2020-11-19  Jonathan Wakely  <jwakely@redhat.com>
 716
 717         PR libstdc++/95989
 718         * config/os/gnu-linux/os_defines.h (_GLIBCXX_NATIVE_THREAD_ID):
 719         Define new macro to get reliable thread ID.
 720         * include/bits/std_thread.h: (this_thread::get_id): Use new
 721         macro if it's defined.
 722         * testsuite/30_threads/jthread/95989.cc: New test.
 723         * testsuite/30_threads/this_thread/95989.cc: New test.
 724
 725 2020-11-19  Jonathan Wakely  <jwakely@redhat.com>
 726
 727         * testsuite/30_threads/async/async.cc: Include <thread>.
 728         * testsuite/30_threads/future/members/93456.cc: Likewise.
 729
 730 2020-11-19  Jonathan Wakely  <jwakely@redhat.com>
 731
 732         PR libstdc++/92546
 733         * include/Makefile.am: Add new <bits/std_thread.h> header.
 734         * include/Makefile.in: Regenerate.
 735         * include/std/future: Include new header instead of <thread>.
 736         * include/std/stop_token: Include new header instead of
 737         <bits/gthr.h>.
 738         (stop_token::_S_yield()): Use this_thread::yield().
 739         (_Stop_state_t::_M_requester): Change type to std::thread::id.
 740         (_Stop_state_t::_M_request_stop()): Use this_thread::get_id().
 741         (_Stop_state_t::_M_remove_callback(_Stop_cb*)): Likewise.
 742         Use __is_single_threaded() to decide whether to synchronize.
 743         * include/std/thread (thread, operator==, this_thread::get_id)
 744         (this_thread::yield): Move to new header.
 745         (operator<=>, operator!=, operator<, operator<=, operator>)
 746         (operator>=, hash<thread::id>, operator<<): Define even when
 747         gthreads not available.
 748         * src/c++11/thread.cc: Include <memory>.
 749         * include/bits/std_thread.h: New file.
 750         (thread, operator==, this_thread::get_id, this_thread::yield):
 751         Define even when gthreads not available.
 752         [!_GLIBCXX_HAS_GTHREADS] (thread::join, thread::detach)
 753         (thread::hardware_concurrency): Define inline.
 754
 755 2020-11-19  Jonathan Wakely  <jwakely@redhat.com>
 756
 757         PR libstdc++/93421
 758         PR libstdc++/93456
 759         * src/c++11/futex.cc (syscall_time_t): New typedef for
 760         the type of the syscall_timespec::tv_sec member.
 761         (relative_timespec, _M_futex_wait_until)
 762         (_M_futex_wait_until_steady): Use syscall_time_t in overflow
 763         checks, not time_t.
 764
 765 2020-11-18  Patrick Palka  <ppalka@redhat.com>
 766
 767         * include/std/ranges (join_view::_Iterator::_M_satisfy): Uglify
 768         local variable inner.
 769         (join_view::_Iterator::operator->): Use _Inner_iter instead of
 770         _Outer_iter in the function signature as per LWG 3500.
 771         * testsuite/std/ranges/adaptors/join.cc (test08): Test it.
 772
 773 2020-11-17  Jonathan Wakely  <jwakely@redhat.com>
 774
 775         PR libstdc++/93421
 776         * acinclude.m4 (GLIBCXX_ENABLE_LIBSTDCXX_TIME): Fail if struct
 777         timespec isn't compatible with SYS_clock_gettime.
 778         * configure: Regenerate.
 779         * src/c++11/chrono.cc: Revert changes for time64 compatibility.
 780         Add static_assert instead.
 781         * src/c++11/futex.cc (_M_futex_wait_until_steady): Assume
 782         SYS_clock_gettime can use struct timespec.
 783
 784 2020-11-17  Jonathan Wakely  <jwakely@redhat.com>
 785
 786         PR libstdc++/97869
 787         * include/precompiled/stdc++.h: Include <coroutine>.
 788         * include/std/version (__cpp_lib_span): Check __cpp_lib_concepts
 789         before defining.
 790
 791 2020-11-17  Patrick Palka  <ppalka@redhat.com>
 792
 793         PR libstdc++/97828
 794         * include/bits/ranges_algo.h (__search_n_fn::operator()): Check
 795         random_access_iterator before using the backtracking
 796         implementation.  When the backwards scan fails prematurely,
 797         reset __remainder appropriately.
 798         * testsuite/25_algorithms/search_n/97828.cc: New test.
 799
 800 2020-11-16  Jonathan Wakely  <jwakely@redhat.com>
 801
 802         * src/Makefile.am (libstdc++-symbols.ver-sun): Remove -lrt from
 803         arguments passed to make_sunver.pl script.
 804         * src/Makefile.in: Regenerate.
 805
 806 2020-11-15  Jason Merrill  <jason@redhat.com>
 807
 808         * testsuite/20_util/result_of/sfinae_friendly_1.cc: Adjust.
 809
 810 2020-11-13  Jonathan Wakely  <jwakely@redhat.com>
 811
 812         PR libstdc++/93421
 813         * src/c++11/chrono.cc [_GLIBCXX_USE_CLOCK_GETTIME_SYSCALL]
 814         (syscall_timespec): Define a type suitable for SYS_clock_gettime
 815         calls.
 816         (system_clock::now(), steady_clock::now()): Use syscall_timespec
 817         instead of timespec.
 818         * src/c++11/futex.cc (syscall_timespec): Define a type suitable
 819         for SYS_futex and SYS_clock_gettime calls.
 820         (relative_timespec): Use syscall_timespec instead of timespec.
 821         (__atomic_futex_unsigned_base::_M_futex_wait_until): Likewise.
 822         (__atomic_futex_unsigned_base::_M_futex_wait_until_steady):
 823         Likewise.
 824
 825 2020-11-13  Jonathan Wakely  <jwakely@redhat.com>
 826
 827         PR libstdc++/93456
 828         * src/c++11/futex.cc (relative_timespec): Remove redundant check
 829         negative values.
 830         * testsuite/30_threads/future/members/wait_until_overflow.cc: Moved to...
 831         * testsuite/30_threads/future/members/93456.cc: ...here.
 832
 833 2020-11-13  Jonathan Wakely  <jwakely@redhat.com>
 834
 835         * src/c++11/futex.cc (relative_timespec): Add [[unlikely]]
 836         attributes.
 837         (__atomic_futex_unsigned_base::_M_futex_wait_until)
 838         (__atomic_futex_unsigned_base::_M_futex_wait_until_steady):
 839         Check for overflow.
 840         * testsuite/30_threads/future/members/wait_until_overflow.cc:
 841         New test.
 842
 843 2020-11-13  Jonathan Wakely  <jwakely@redhat.com>
 844
 845         * src/c++11/futex.cc (relative_timespec): New function to
 846         create relative time from two absolute times.
 847         (__atomic_futex_unsigned_base::_M_futex_wait_until)
 848         (__atomic_futex_unsigned_base::_M_futex_wait_until_steady):
 849         Use relative_timespec.
 850
 851 2020-11-13  Jonathan Wakely  <jwakely@redhat.com>
 852
 853         * testsuite/30_threads/future/members/poll.cc: Require gthreads
 854         and add -pthread for targets that require it. Relax required
 855         ratio of wait_for calls before/after the future is ready.
 856
 857 2020-11-12  Jonathan Wakely  <jwakely@redhat.com>
 858
 859         * include/std/future (future::wait_for): Do not wait for
 860         durations less than or equal to zero.
 861         * src/c++11/futex.cc (_M_futex_wait_until)
 862         (_M_futex_wait_until_steady): Do not wait for timeouts before
 863         the epoch.
 864         * testsuite/30_threads/future/members/poll.cc: New test.
 865
 866 2020-11-12  Jonathan Wakely  <jwakely@redhat.com>
 867
 868         * include/ext/numeric_traits.h (__numeric_traits): Change
 869         primary template to always derive from __numeric_traits_integer.
 870         (__numeric_traits<float>, __numeric_traits<double>)
 871         (__numeric_traits<long double>): Add explicit specializations.
 872
 873 2020-11-12  Jonathan Wakely  <jwakely@redhat.com>
 874
 875         PR libstdc++/97798
 876         * include/ext/numeric_traits.h (__glibcxx_signed)
 877         (__glibcxx_digits, __glibcxx_min, __glibcxx_max): Remove
 878         macros.
 879         (__is_integer_nonstrict::__width): Define new constant.
 880         (__numeric_traits_integer): Define constants in terms of each
 881         other and __is_integer_nonstrict::__width, rather than the
 882         removed macros.
 883         (_GLIBCXX_INT_N_TRAITS): Macro to define explicit
 884         specializations for non-standard integer types.
 885
 886 2020-11-11  Jonathan Yong  <10walls@gmail.com>
 887
 888         * acinclude.m4 (GLIBCXX_CHECK_LINKER_FEATURES): Exclude
 889         cygwin and mingw from relro linker test.
 890         * configure: Regenerate.
 891
 892 2020-11-11  Paul Scharnofske  <asynts@gmail.com>
 893
 894         * include/std/thread (jthread::operator=(jthread&&)): Transfer
 895         any existing state to a temporary that will request a stop and
 896         then join.
 897         * testsuite/30_threads/jthread/jthread.cc: Test move assignment.
 898
 899 2020-11-11  Jonathan Wakely  <jwakely@redhat.com>
 900
 901         * include/std/stop_token (_Stop_state_t::_M_requester): Define
 902         new struct with members to store and check the thread ID.
 903         (_Stop_state_t::_M_request_stop()): Use _M_requester._M_set().
 904         (_Stop_state_t::_M_remove_callback(_Stop_cb*)): Use
 905         _M_requester._M_is_current_thread().
 906
 907 2020-11-11  Jonathan Wakely  <jwakely@redhat.com>
 908
 909         * include/std/ostream (__syncbuf_base): New class template.
 910         (emit_on_flush, noemit_on_flush, flush_emit): New manipulators.
 911         * include/std/syncstream (basic_syncbuf): Derive from
 912         __syncbuf_base instead of basic_streambuf.
 913         (basic_syncbuf::operator=): Remove self-assignment check.
 914         (basic_syncbuf::swap): Remove self-swap check.
 915         (basic_syncbuf::emit): Do not skip pubsync() call if sequence
 916         is empty.
 917         (basic_syncbuf::sync): Remove no-op pubsync on stringbuf.
 918         (basic_syncbuf::overflow): Define override.
 919         * testsuite/27_io/basic_syncstream/basic_ops/1.cc: Test
 920         basic_osyncstream::put(char_type).
 921         * testsuite/27_io/basic_ostream/emit/1.cc: New test.
 922
 923 2020-11-10  Jonathan Wakely  <jwakely@redhat.com>
 924
 925         * config/locale/generic/c_locale.cc (__set_C_locale()): New function
 926         to set the "C" locale and return the name of the previous locale.
 927         (__convert_to_v<float>, __convert_to_v<double>)
 928         (__convert_to_v<long double>): Use __set_C_locale and set failbit on
 929         error.
 930
 931 2020-11-10  Jonathan Wakely  <jwakely@redhat.com>
 932
 933         * include/std/sstream (basic_stringbug, basic_istringstream)
 934         (basic_ostringstream, basic_stringstream): Reorder C++20
 935         constructors to be declared next to other constructors.
 936
 937 2020-11-10  Jonathan Wakely  <jwakely@redhat.com>
 938
 939         * config/abi/pre/gnu.ver (GLIBCXX_3.4.21): Tighten patterns.
 940         (GLIBCXX_3.4.29): Export new symbols.
 941         * include/bits/alloc_traits.h (__allocator_like): New concept.
 942         * include/std/sstream (basic_stringbuf::swap): Add exception
 943         specification.
 944         (basic_stringbuf::str() const): Add ref-qualifier. Use new
 945         _M_high_mark function.
 946         (basic_stringbuf::str(const SAlloc&) const): Define new function.
 947         (basic_stringbuf::str() &&): Likewise.
 948         (basic_stringbuf::str(const basic_string<C,T,SAlloc>&)):
 949         Likewise.
 950         (basic_stringbuf::str(basic_string<C,T,Alloc>&&)): Likewise.
 951         (basic_stringbuf::view() const): Use _M_high_mark.
 952         (basic_istringstream::str, basic_ostringstream::str)
 953         (basic_stringstream::str): Define new overloads.
 954         * src/c++20/sstream-inst.cc (basic_stringbuf::str)
 955         (basic_istringstream::str, basic_ostringstream::str)
 956         (basic_stringstream::str): Explicit instantiation definitions
 957         for new overloads.
 958         * testsuite/27_io/basic_istringstream/view/char/1.cc: Add more
 959         checks.
 960         * testsuite/27_io/basic_istringstream/view/wchar_t/1.cc:
 961         Likewise.
 962         * testsuite/27_io/basic_ostringstream/view/char/1.cc:
 963         Likewise.
 964         * testsuite/27_io/basic_ostringstream/view/wchar_t/1.cc:
 965         Likewise.
 966         * testsuite/27_io/basic_stringstream/view/char/1.cc:
 967         Likewise.
 968         * testsuite/27_io/basic_stringstream/view/wchar_t/1.cc:
 969         Likewise.
 970         * testsuite/27_io/basic_istringstream/str/char/2.cc: New test.
 971         * testsuite/27_io/basic_istringstream/str/wchar_t/2.cc: New test.
 972         * testsuite/27_io/basic_ostringstream/str/char/3.cc: New test.
 973         * testsuite/27_io/basic_ostringstream/str/wchar_t/3.cc: New test.
 974         * testsuite/27_io/basic_stringbuf/str/char/4.cc: New test.
 975         * testsuite/27_io/basic_stringbuf/str/wchar_t/4.cc: New test.
 976         * testsuite/27_io/basic_stringstream/str/char/5.cc: New test.
 977         * testsuite/27_io/basic_stringstream/str/wchar_t/5.cc.cc: New test.
 978
 979 2020-11-10  Jonathan Wakely  <jwakely@redhat.com>
 980
 981         PR libstdc++/97415
 982         * include/std/sstream (basic_stringbuf::_M_update_egptr)
 983         (basic_stringbuf::__xfer_bufptrs::__xfer_bufptrs): Check for
 984         null before comparing pointers.
 985
 986 2020-11-09  François Dumont  <fdumont@gcc.gnu.org>
 987
 988         * include/debug/array: Remove.
 989         * include/Makefile.am: Remove <debug/array>.
 990         * include/Makefile.in: Regenerate.
 991         * include/experimental/functional: Adapt.
 992         * include/std/array: Move to _GLIBCXX_INLINE_VERSION namespace.
 993         * include/std/functional: Adapt.
 994         * include/std/span: Adapt.
 995         * testsuite/23_containers/array/debug/back1_neg.cc:
 996         Remove dg-require-debug-mode. Add -D_GLIBCXX_ASSERTIONS option.
 997         * testsuite/23_containers/array/debug/back2_neg.cc: Likewise.
 998         * testsuite/23_containers/array/debug/front1_neg.cc: Likewise.
 999         * testsuite/23_containers/array/debug/front2_neg.cc: Likewise.
1000         * testsuite/23_containers/array/debug/square_brackets_operator1_neg.cc:
1001         Likewise.
1002         * testsuite/23_containers/array/debug/square_brackets_operator2_neg.cc:
1003         Likewise.
1004         * testsuite/23_containers/array/element_access/60497.cc
1005         * testsuite/23_containers/array/tuple_interface/get_debug_neg.cc:
1006         Remove.
1007         * testsuite/23_containers/array/tuple_interface/get_neg.cc
1008         * testsuite/23_containers/array/tuple_interface/tuple_element_debug_neg.cc
1009         * testsuite/23_containers/array/tuple_interface/tuple_element_neg.cc
1010
1011 2020-11-09  François Dumont  <fdumont@gcc.gnu.org>
1012
1013         * include/debug/assertions.h (__glibcxx_requires_non_empty_range):
1014         Remove __builtin_expect.
1015         (__glibcxx_requires_subscript): Likewise.
1016         (__glibcxx_requires_nonempty): Likewise.
1017         * include/debug/formatter.h (__check_singular): Add C++11 constexpr
1018         qualification.
1019         * include/debug/helper_functions.h (__check_singular): Likewise. Skip
1020         check if constant evaluated.
1021         (__valid_range): Do not skip check if constant evaluated.
1022         * include/debug/macros.h (_GLIBCXX_DEBUG_VERIFY_COND_AT): Add
1023         __builtin_expect.
1024         (_GLIBCXX_DEBUG_VERIFY_AT_F): Use __glibcxx_assert_1.
1025         * testsuite/21_strings/basic_string_view/element_access/char/back_constexpr_neg.cc:
1026         New test.
1027         * testsuite/21_strings/basic_string_view/element_access/char/constexpr.cc: New test.
1028         * testsuite/21_strings/basic_string_view/element_access/char/constexpr_neg.cc: New test.
1029         * testsuite/21_strings/basic_string_view/element_access/char/front_back_constexpr.cc:
1030         New test.
1031         * testsuite/21_strings/basic_string_view/element_access/char/front_constexpr_neg.cc:
1032         New test.
1033         * testsuite/21_strings/basic_string_view/element_access/wchar_t/back_constexpr_neg.cc:
1034         New test.
1035         * testsuite/21_strings/basic_string_view/element_access/wchar_t/constexpr.cc: New test.
1036         * testsuite/21_strings/basic_string_view/element_access/wchar_t/constexpr_neg.cc: New test.
1037         * testsuite/21_strings/basic_string_view/element_access/wchar_t/front_constexpr_neg.cc:
1038         New test.
1039         * testsuite/25_algorithms/lower_bound/debug/constexpr_partitioned_neg.cc: New test.
1040         * testsuite/25_algorithms/lower_bound/debug/constexpr_partitioned_pred_neg.cc: New test.
1041         * testsuite/25_algorithms/lower_bound/debug/constexpr_valid_range_neg.cc: New test.
1042         * testsuite/25_algorithms/lower_bound/debug/partitioned_neg.cc: New test.
1043         * testsuite/25_algorithms/lower_bound/debug/partitioned_pred_neg.cc: New test.
1044         * testsuite/25_algorithms/upper_bound/debug/constexpr_partitioned_neg.cc: New test.
1045         * testsuite/25_algorithms/upper_bound/debug/constexpr_partitioned_pred_neg.cc: New test.
1046         * testsuite/25_algorithms/upper_bound/debug/constexpr_valid_range_neg.cc: New test.
1047         * testsuite/25_algorithms/upper_bound/debug/partitioned_neg.cc: New test.
1048         * testsuite/25_algorithms/upper_bound/debug/partitioned_pred_neg.cc: New test.
1049
1050 2020-11-09  Jonathan Wakely  <jwakely@redhat.com>
1051
1052         * include/bits/uniform_int_dist.h (__detail::_Power_of_2):
1053         Document that true result for zero is intentional.
1054
1055 2020-11-09  Jonathan Wakely  <jwakely@redhat.com>
1056
1057         * include/std/bit (__popcount): Remove redundant check for zero.
1058
1059 2020-11-09  Jonathan Wakely  <jwakely@redhat.com>
1060
1061         PR libstdc++/97729
1062         * libsupc++/exception_ptr.h (exception_ptr::exception_ptr())
1063         (exception_ptr::exception_ptr(const exception_ptr&))
1064         (exception_ptr::~exception_ptr()): Remove 'always_inline'
1065         attributes. Use 'inline' unconditionally.
1066
1067 2020-11-09  Jonathan Wakely  <jwakely@redhat.com>
1068
1069         PR libstdc++/97758
1070         * include/bits/std_function.h [!__cpp_rtti]: Include <typeinfo>.
1071
1072 2020-11-07  Liu Hao  <lh_mouse@126.com>
1073
1074         * libsupc++/cxxabi.h: (__cxa_atexit): mark with _GLIBCXX_CDTOR_CALLABI
1075         (__cxa_thread_atexit): ditto
1076         * libsupc++/atexit_thread.cc: (__cxa_atexit): mark with
1077         _GLIBCXX_CDTOR_CALLABI
1078         (__cxa_thread_atexit): ditto
1079         (elt): ditto
1080
1081 2020-11-06  Jonathan Wakely  <jwakely@redhat.com>
1082
1083         * config/abi/pre/gnu.ver (GLIBCXX_3.4.21): Tighten up patterns
1084         for basic_stringbuf that refer to __xfer_bufptrs.
1085
1086 2020-11-05  Marek Polacek  <polacek@redhat.com>
1087
1088         PR c++/25814
1089         * testsuite/20_util/reference_wrapper/lwg2993.cc: Add a dg-warning.
1090         * testsuite/25_algorithms/generate_n/87982_neg.cc: Likewise.
1091
1092 2020-11-05  Jonathan Wakely  <jwakely@redhat.com>
1093
1094         PR libstdc++/96269
1095         * include/std/optional (operator==, operator!=, operator<)
1096         (operator>, operator<=, operator>=): Fix types used in
1097         SFINAE constraints.
1098         * testsuite/20_util/optional/relops/96269.cc: New test.
1099
1100 2020-11-05  Jonathan Wakely  <jwakely@redhat.com>
1101
1102         PR libstdc++/97731
1103         * src/filesystem/dir.cc (recursive_directory_iterator): Call the
1104         right overload of _Dir::advance.
1105         * testsuite/experimental/filesystem/iterators/97731.cc: New test.
1106
1107 2020-11-05  Jonathan Wakely  <jwakely@redhat.com>
1108
1109         PR libstdc++/97729
1110         * include/std/future (__basic_future::_M_get_result): Use
1111         nullptr for null pointer constant.
1112         * libsupc++/eh_ptr.cc (operator==, operator!=): Remove
1113         definitions.
1114         * libsupc++/exception_ptr.h (_GLIBCXX_EH_PTR_USED): Define
1115         macro to conditionally add __attribute__((__used__)).
1116         (operator==, operator!=, exception_ptr::exception_ptr())
1117         (exception_ptr::exception_ptr(const exception_ptr&))
1118         (exception_ptr::~exception_ptr())
1119         (exception_ptr::operator=(const exception_ptr&))
1120         (exception_ptr::swap(exception_ptr&)): Always define as
1121         inline. Add macro to be conditionally "used".
1122
1123 2020-11-05  Jonathan Wakely  <jwakely@redhat.com>
1124
1125         PR libstdc++/97729
1126         * config/abi/pre/gnu.ver (GLIBCXX_3.4.29): Add exports.
1127         * src/c++20/sstream-inst.cc (basic_stringbuf): Instantiate
1128         private constructor taking __xfer_bufptrs.
1129
1130 2020-11-05  Jonathan Wakely  <jwakely@redhat.com>
1131
1132         * include/std/sstream (basic_stringbuf(const allocator_type&):
1133         Add explicit.
1134         (basic_stringbuf(const basic_string<C,T,SA>&, openmode, const A&)):
1135         Call _M_stringbuf_init. Construct _M_string from pointer and length
1136         to avoid constraint checks for string view.
1137         (basic_stringbuf::view()): Make __sv_type alias local to the
1138         function.
1139         (basic_istringstream(const basic_string<C,T,SA>&, openmode, const A&)):
1140         Pass string to _M_streambuf instead of constructing a temporary
1141         with the wrong allocator.
1142         (basic_ostringstream(const basic_string<C,T,SA>&, openmode, const A&)):
1143         Likewise.
1144         (basic_stringstream(const basic_string<C,T,SA>&, openmode, const A&)):
1145         Likewise.
1146         * src/c++20/sstream-inst.cc: Use string_view and wstring_view
1147         typedefs in explicit instantiations.
1148         * testsuite/27_io/basic_istringstream/cons/char/1.cc: Add more
1149         tests for constructors.
1150         * testsuite/27_io/basic_ostringstream/cons/char/1.cc: Likewise.
1151         * testsuite/27_io/basic_stringbuf/cons/char/1.cc: Likewise.
1152         * testsuite/27_io/basic_stringbuf/cons/char/2.cc: Likewise.
1153         * testsuite/27_io/basic_stringbuf/cons/wchar_t/1.cc: Likewise.
1154         * testsuite/27_io/basic_stringbuf/cons/wchar_t/2.cc: Likewise.
1155         * testsuite/27_io/basic_stringstream/cons/char/1.cc: Likewise.
1156
1157 2020-11-05  Jonathan Wakely  <jwakely@redhat.com>
1158
1159         * include/std/sstream: Adjust whitespace.
1160
1161 2020-11-04  Jonathan Wakely  <jwakely@redhat.com>
1162
1163         PR libstdc++/97719
1164         * include/std/sstream (basic_stringstream(string_type&&, openmode)):
1165         Fix default argument.
1166         * testsuite/27_io/basic_stringstream/cons/char/97719.cc: New test.
1167
1168 2020-11-04  Jonathan Wakely  <jwakely@redhat.com>
1169
1170         * testsuite/18_support/96817.cc: Fail fast if the library is
1171         configured to not use futexes.
1172
1173 2020-11-04  Jonathan Wakely  <jwakely@redhat.com>
1174
1175         PR libstdc++/94971
1176         * include/bits/stl_algo.h (search(FIter, FIter, const Searcher):
1177         Adjust #if condition.
1178         * include/parallel/algo.h (search(FIter, FIter, const Searcher&):
1179         Define new overload for C++17.
1180
1181 2020-11-04  Jonathan Wakely  <jwakely@redhat.com>
1182
1183         PR libstdc++/92285
1184         * doc/xml/manual/evolution.xml: Document change to base class.
1185         * doc/html/manual/api.html: Regenerate.
1186
1187 2020-11-04  Jonathan Wakely  <jwakely@redhat.com>
1188
1189         * include/bits/uniform_int_dist.h (uniform_int_distribution::_S_nd):
1190         Use qualified-id to refer to static member functions.
1191
1192 2020-11-03  Jonathan Wakely  <jwakely@redhat.com>
1193
1194         * include/std/syncstream: Include <bits/std_mutex.h>
1195         unconditionally.
1196
1197 2020-11-03  François Dumont  <fdumont@gcc.gnu.org>
1198
1199         * config/abi/pre/gnu-versioned-namespace.ver:
1200         Add __istream_extract and _Safe_local_iterator_base::_M_attach_single
1201         symbols.
1202
1203 2020-11-03  Jonathan Wakely  <jwakely@redhat.com>
1204
1205         * src/c++11/mutex.cc [_GLIBCXX_HAVE_TLS] (__once_proxy): Define
1206         separately for TLS targets.
1207         [!_GLIBCXX_HAVE_TLS] (__get_once_functor_lock_ptr): Replace with ...
1208         (set_lock_ptr): ... this. Set new value and return previous
1209         value.
1210         [!_GLIBCXX_HAVE_TLS] (__set_once_functor_lock_ptr): Adjust to
1211         use set_lock_ptr.
1212         [!_GLIBCXX_HAVE_TLS] (__once_proxy): Likewise.
1213
1214 2020-11-03  Jonathan Wakely  <jwakely@redhat.com>
1215
1216         PR libstdc++/55394
1217         PR libstdc++/66146
1218         PR libstdc++/84323
1219         * config/abi/pre/gnu.ver (GLIBCXX_3.4.29): Add new symbols.
1220         * include/std/mutex [!_GLIBCXX_HAS_GTHREADS] (once_flag): Define
1221         even when gthreads is not supported.
1222         (once_flag::_M_once) [_GLIBCXX_HAVE_LINUX_FUTEX]: Change type
1223         from __gthread_once_t to int.
1224         (once_flag::_M_passive(), once_flag::_M_activate())
1225         (once_flag::_M_finish(bool), once_flag::_Active_execution):
1226         Define new members for futex and non-threaded implementation.
1227         [_GLIBCXX_HAS_GTHREADS] (once_flag::_Prepare_execution): New
1228         RAII helper type.
1229         (call_once): Use new members of once_flag.
1230         * src/c++11/mutex.cc (std::once_flag::_M_activate): Define.
1231         (std::once_flag::_M_finish): Define.
1232         * testsuite/30_threads/call_once/39909.cc: Do not require
1233         gthreads.
1234         * testsuite/30_threads/call_once/49668.cc: Likewise.
1235         * testsuite/30_threads/call_once/60497.cc: Likewise.
1236         * testsuite/30_threads/call_once/call_once1.cc: Likewise.
1237         * testsuite/30_threads/call_once/dr2442.cc: Likewise.
1238         * testsuite/30_threads/call_once/once_flag.cc: Add test for
1239         constexpr constructor.
1240         * testsuite/30_threads/call_once/66146.cc: New test.
1241         * testsuite/30_threads/call_once/constexpr.cc: Removed.
1242         * testsuite/30_threads/once_flag/cons/constexpr.cc: Removed.
1243
1244 2020-11-03  Jonathan Yong  <10walls@gmail.com>
1245
1246         * src/Makefile.am (libstdc___la_LINK): Add lt_host_flags.
1247         * src/Makefile.in: Regenerate.
1248
1249 2020-11-02  Thomas Rodgers  <trodgers@redhat.com>
1250
1251         * doc/doxygen/user.cfg.in (INPUT): Add new header.
1252         * include/Makefile.am (std_headers): Add new header.
1253         * include/Makefile.in: Regenerate.
1254         * include/precompiled/stdc++.h: Include new header.
1255         * include/std/syncstream: New header.
1256         * include/std/version: Add __cpp_lib_syncbuf.
1257         * testsuite/27_io/basic_syncbuf/1.cc: New test.
1258         * testsuite/27_io/basic_syncbuf/2.cc: Likewise.
1259         * testsuite/27_io/basic_syncbuf/basic_ops/1.cc:
1260         Likewise.
1261         * testsuite/27_io/basic_syncbuf/requirements/types.cc:
1262         Likewise.
1263         * testsuite/27_io/basic_syncbuf/sync_ops/1.cc:
1264         Likewise.
1265         * testsuite/27_io/basic_syncstream/1.cc: Likewise.
1266         * testsuite/27_io/basic_syncstream/2.cc: Likewise.
1267         * testsuite/27_io/basic_syncstream/basic_ops/1.cc:
1268         Likewise.
1269         * testsuite/27_io/basic_syncstream/requirements/types.cc:
1270         Likewise.
1271
1272 2020-11-01  Jonathan Wakely  <jwakely@redhat.com>
1273
1274         * include/std/type_traits (is_integral<wchar_t>)
1275         (make_unsigned<wchar_t>, make_signed<wchar_t>): Define based
1276         on #ifdef __WCHAR_TYPE__ instead of _GLIBCXX_USE_WCHAR_T.
1277         * include/bits/cpp_type_traits.h (__is_integer<wchar_t>)
1278         (__is_char<wchar_t>): Likewise.
1279
1280 2020-10-31  François Dumont  <fdumont@gcc.gnu.org>
1281
1282         * src/c++17/floating_from_chars.cc (_GLIBCXX_USE_CX11_ABI): Add define.
1283         (buffering_string): New.
1284         [!_GLIBCXX_USE_CXX11_ABI](reserve_string): New.
1285         (from_chars): Adapt.
1286         * src/c++20/sstream-inst.cc: Limit instantiations to
1287         _GLIBCXX_USE_CXX11_ABI.
1288
1289 2020-10-31  Jonathan Wakely  <jwakely@redhat.com>
1290
1291         * include/bits/random.h (independent_bit_engine): Fix typo
1292         in comment.
1293         (shuffle_order_engine): Fix incorrect description in comment.
1294         * include/bits/random.tcc (__representable_as_double
1295         (__p1_representable_as_double): New helper functions.
1296         (shuffle_order_engine::operator()): Use double for calculation
1297         if (max() - min() + 1) is representable as double.
1298         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error
1299         line number.
1300
1301 2020-10-31  Jonathan Wakely  <jwakely@redhat.com>
1302
1303         PR libstdc++/96958
1304         * include/bits/hashtable_policy.h (_Prime_rehash_policy)
1305         (_Power2_rehash_policy): Use ceil and floor instead of ceill and
1306         floorl.
1307         * src/c++11/hashtable_c++0x.cc (_Prime_rehash_policy): Likewise.
1308         Use double instead of long double.
1309
1310 2020-10-31  Patrick Palka  <ppalka@redhat.com>
1311
1312         PR libstdc++/97600
1313         * include/std/ranges (basic_istream_view::begin): Initialize
1314         _Iterator from 'this' instead of '*this'.
1315         (basic_istream_view::_Iterator::_Iterator): Adjust constructor
1316         accordingly.
1317         (filter_view::_Iterator::_Iterator): Take a filter_view*
1318         argument instead of a filter_view& argument.
1319         (filter_view::_Sentinel::_Sentinel): Likewise.
1320         (filter_view::begin): Initialize _Iterator from 'this' instead
1321         of '*this'.
1322         (filter_view::end): Likewise.
1323         (transform_view::_Iterator::_Iterator): Take a _Parent* instead
1324         of a _Parent&.
1325         (filter_view::_Iterator::operator+): Adjust accordingly.
1326         (filter_view::_Iterator::operator-): Likewise.
1327         (filter_view::begin): Initialize _Iterator from 'this' instead
1328         of '*this'.
1329         (filter_view::end): Likewise.
1330         (join_view::_Iterator): Take a _Parent* instead of a _Parent&.
1331         (join_view::_Sentinel): Likewise.
1332         (join_view::begin): Initialize _Iterator from 'this' instead of
1333         '*this'.
1334         (join_view::end): Initialize _Sentinel from 'this' instead of
1335         '*this'.
1336         (split_view::_OuterIter): Take a _Parent& instead of a _Parent*.
1337         (split_view::begin): Initialize _OuterIter from 'this' instead
1338         of '*this'.
1339         (split_view::end): Likewise.
1340         * testsuite/std/ranges/97600.cc: New test.
1341
1342 2020-10-30  Jonathan Wakely  <jwakely@redhat.com>
1343
1344         * include/std/ranges (enable_borrowed_view<take_view<T>>)
1345         (enable_borrowed_view<drop_view<T>>)
1346         (enable_borrowed_view<drop_while_view<T>>)
1347         (enable_borrowed_view<reverse_view<T>>)
1348         (enable_borrowed_view<common_view<T>>)
1349         (enable_borrowed_view<elements_view<T>>): Add partial
1350         specializations as per P2017R1.
1351         * testsuite/std/ranges/adaptors/conditionally_borrowed.cc:
1352         New test.
1353
1354 2020-10-30  Jonathan Wakely  <jwakely@redhat.com>
1355
1356         PR libstdc++/96958
1357         * include/bits/hashtable_policy.h (_Prime_rehash_policy)
1358         (_Power2_rehash_policy): Use double instead of long double.
1359
1360 2020-10-30  Jonathan Wakely  <jwakely@redhat.com>
1361
1362         * testsuite/23_containers/vector/bool/modifiers/insert/31370.cc:
1363         Avoid -Wcatch-value warnings.
1364
1365 2020-10-30  Patrick Palka  <ppalka@redhat.com>
1366
1367         * include/std/ranges (__detail::__box): For the partial
1368         specialization used by types that are already semiregular,
1369         make the default constructor value-initialize the underlying
1370         object instead of default-initializing it.  Make its in place
1371         constructor explicit.
1372         * testsuite/std/ranges/adaptors/detail/semiregular_box.cc:
1373         Augment test.
1374
1375 2020-10-30  David Edelsohn  <dje.gcc@gmail.com>
1376
1377         * testsuite/20_util/unique_ptr/creation/for_overwrite.cc: XFAIL on AIX.
1378
1379 2020-10-29  Jonathan Wakely  <jwakely@redhat.com>
1380
1381         * config/abi/pre/gnu.ver (GLIBCXX_3.4.21): Tighten patterns
1382         for old <sstream> symbols some more.
1383
1384 2020-10-29  Jonathan Wakely  <jwakely@redhat.com>
1385
1386         * include/bits/ranges_util.h (subrange::subrange(R&&)): Use
1387         direct-initialization instead of list-initialization, so a
1388         potential narrowing conversion from ranges::size(r) to the
1389         stored size isn't ill-formed.
1390
1391 2020-10-29  Jonathan Wakely  <jwakely@redhat.com>
1392
1393         * include/bits/parse_numbers.h (_Select_int_base): Avoid
1394         narrowing conversion in constant expression.
1395         * include/experimental/buffer (buffer_copy): Avoid narrowing
1396         conversion.
1397         * include/experimental/internet (hash<>::operator()): Do not
1398         use deprecated 'argument_type' member.
1399         * include/std/variant (variant::emplace): Use cast instead
1400         of implicit conversion from size_t to narrower unsigned type.
1401
1402 2020-10-29  Jonathan Wakely  <jwakely@redhat.com>
1403
1404         * include/tr1/shared_ptr.h (__shared_count, __shared_ptr)
1405         (shared_ptr): Add diagnostic pragmas around uses of auto_ptr.
1406         * testsuite/tr1/2_general_utilities/shared_ptr/cons/43820_neg.cc:
1407         Adust dg-error line numbers.
1408
1409 2020-10-29  Jonathan Wakely  <jwakely@redhat.com>
1410
1411         * testsuite/18_support/96817.cc: Avoid -Wunused warnings.
1412         * testsuite/20_util/any/assign/2.cc: Likewise.
1413         * testsuite/20_util/any/cons/2.cc: Likewise.
1414         * testsuite/20_util/align/1.cc: Avoid -Wsign-compare warning.
1415         * testsuite/20_util/function/65760.cc: Avoid -Wunused warning.
1416         * testsuite/20_util/function/1.cc: Avoid -Wcatch-value warning.
1417         * testsuite/20_util/function/cons/move_target.cc: Avoid -Wunused
1418         warning.
1419         * testsuite/20_util/headers/memory/synopsis.cc: Add exception
1420         specification.
1421         * testsuite/20_util/monotonic_buffer_resource/allocate.cc: Avoid
1422         -Wsign-compare warning.
1423         * testsuite/20_util/tuple/cons/deduction.cc: Avoid -Wunused
1424         warning.
1425         * testsuite/20_util/specialized_algorithms/uninitialized_copy/808590-cxx11.cc:
1426         Avoid -Wdeprecated-copy warning.
1427         * testsuite/21_strings/basic_string/56166.cc: Avoid
1428         -Wcatch-value warning.
1429         * testsuite/21_strings/basic_string/numeric_conversions/char/stod.cc:
1430         Avoid -Wcatch-value warnings.
1431         * testsuite/21_strings/basic_string/numeric_conversions/char/stof.cc:
1432         Likewise.
1433         * testsuite/21_strings/basic_string/numeric_conversions/char/stoi.cc:
1434         Likewise.
1435         * testsuite/21_strings/basic_string/numeric_conversions/char/stol.cc:
1436         Likewise.
1437         * testsuite/21_strings/basic_string/numeric_conversions/char/stold.cc:
1438         Likewise.
1439         * testsuite/21_strings/basic_string/numeric_conversions/char/stoll.cc:
1440         Likewise.
1441         * testsuite/21_strings/basic_string/numeric_conversions/char/stoul.cc:
1442         Likewise.
1443         * testsuite/21_strings/basic_string/numeric_conversions/char/stoull.cc:
1444         Likewise.
1445         * testsuite/21_strings/basic_string/numeric_conversions/wchar_t/stod.cc:
1446         Likewise.
1447         * testsuite/21_strings/basic_string/numeric_conversions/wchar_t/stof.cc:
1448         Likewise.
1449         * testsuite/21_strings/basic_string/numeric_conversions/wchar_t/stoi.cc:
1450         Likewise.
1451         * testsuite/21_strings/basic_string/numeric_conversions/wchar_t/stol.cc:
1452         Likewise.
1453         * testsuite/21_strings/basic_string/numeric_conversions/wchar_t/stold.cc:
1454         Likewise.
1455         * testsuite/21_strings/basic_string/numeric_conversions/wchar_t/stoll.cc:
1456         Likewise.
1457         * testsuite/21_strings/basic_string/numeric_conversions/wchar_t/stoul.cc:
1458         Likewise.
1459         * testsuite/21_strings/basic_string/numeric_conversions/wchar_t/stoull.cc:
1460         Likewise.
1461         * testsuite/21_strings/basic_string_view/operations/compare/char/nonnull.cc:
1462         Prune additional diagnostics.
1463         * testsuite/21_strings/basic_string_view/operations/find/char/nonnull.cc:
1464         Likewise.
1465         * testsuite/21_strings/basic_string_view/operations/rfind/char/nonnull.cc:
1466         Likewise.
1467         * testsuite/21_strings/headers/string/synopsis.cc: Add exception
1468         specifications.
1469         * testsuite/22_locale/locale/cons/12352.cc: Define sized
1470         delete operators to avoid warnings.
1471         * testsuite/23_containers/deque/modifiers/swap/1.cc: Add
1472         exception specification.
1473         * testsuite/23_containers/forward_list/cons/11.cc: Avoid
1474         -Wdeprecated-copy warning.
1475         * testsuite/23_containers/headers/bitset/synopsis.cc: Add
1476         exception specification.
1477         * testsuite/23_containers/headers/deque/synopsis.cc: Likewise.
1478         * testsuite/23_containers/headers/forward_list/synopsis.cc:
1479         Likewise.
1480         * testsuite/23_containers/headers/list/synopsis.cc: Likewise.
1481         * testsuite/23_containers/headers/map/synopsis.cc: Likewise.
1482         * testsuite/23_containers/headers/queue/synopsis.cc: Likewise.
1483         * testsuite/23_containers/headers/set/synopsis.cc: Likewise.
1484         * testsuite/23_containers/headers/vector/synopsis.cc: Likewise.
1485         * testsuite/23_containers/list/modifiers/swap/1.cc: Likewise.
1486         * testsuite/23_containers/map/modifiers/swap/1.cc: Likewise.
1487         * testsuite/23_containers/multimap/modifiers/swap/1.cc:
1488         Likewise.
1489         * testsuite/23_containers/multiset/modifiers/swap/1.cc:
1490         Likewise.
1491         * testsuite/23_containers/set/modifiers/swap/1.cc: Likewise.
1492         * testsuite/23_containers/unordered_set/56267-2.cc: Avoid
1493         -Wdeprecated-copy warning.
1494         * testsuite/23_containers/vector/bool/23632.cc: Avoid
1495         -Wempty-body warning.
1496         * testsuite/23_containers/vector/modifiers/swap/1.cc: Add
1497         exception specification.
1498         * testsuite/25_algorithms/heap/moveable2.cc: Fix misplaced
1499         parentheses around arguments.
1500         * testsuite/25_algorithms/sample/1.cc: Use return value.
1501         * testsuite/25_algorithms/search/searcher.cc: Avoid -Wunused
1502         warnings.
1503         * testsuite/27_io/basic_ostream/exceptions/char/9561.cc:
1504         Likewise.
1505         * testsuite/27_io/basic_ostream/exceptions/wchar_t/9561.cc:
1506         Likewise.
1507         * testsuite/27_io/filesystem/operations/remove_all.cc: Avoid
1508         -Wsign-compare warning.
1509         * testsuite/experimental/any/assign/2.cc: Avoid -Wunused warnings.
1510         * testsuite/experimental/any/cons/2.cc: Likewise.
1511         * testsuite/experimental/filesystem/operations/remove_all.cc:
1512         Avoid -Wign-compare warning.
1513         * testsuite/experimental/memory/observer_ptr/cons/cons.cc:
1514         Likewise.
1515         * testsuite/experimental/memory_resource/null_memory_resource.cc:
1516         Likewise.
1517         * testsuite/experimental/source_location/1.cc: Avoid -Waddress
1518         warning.
1519         * testsuite/ext/pod_char_traits.cc: Avoid -Wunused warning.
1520         * testsuite/ext/vstring/modifiers/clear/56166.cc: Avoid
1521         -Wcatch-value.
1522         * testsuite/std/concepts/concepts.lang/concept.swappable/swap.cc:
1523         Avoid -Wunused warning.
1524         * testsuite/std/concepts/concepts.lang/concept.swappable/swappable.cc:
1525         Likewise.
1526         * testsuite/tr1/2_general_utilities/shared_ptr/cons/43820_neg.cc:
1527         Prune additional warnings.
1528         * testsuite/tr1/3_function_objects/function/1.cc: Avoid
1529         -Wcatch-value warning.
1530         * testsuite/util/replacement_memory_operators.h: Define sized
1531         delete to avoid warnings.
1532         * testsuite/util/testsuite_api.h (_NonDefaultConstructible): Add
1533         user-declared assignment operator to stop -Wdeprecated-copy
1534         warnings.
1535         * testsuite/util/testsuite_containers.h: Avoid -Wunused warning.
1536         * testsuite/util/testsuite_iterators.h: Avoid -Wsign-compare
1537         warnings.
1538         * testsuite/util/testsuite_new_operators.h: Define sized deleted.
1539
1540 2020-10-29  Jonathan Wakely  <jwakely@redhat.com>
1541
1542         * testsuite/25_algorithms/all_of/constexpr.cc: Check result of
1543         the algorithm.
1544         * testsuite/25_algorithms/any_of/constexpr.cc: Likewise.
1545         * testsuite/25_algorithms/binary_search/constexpr.cc: Likewise.
1546         * testsuite/25_algorithms/copy_backward/constexpr.cc: Likewise.
1547         * testsuite/25_algorithms/count/constexpr.cc: Likewise.
1548         * testsuite/25_algorithms/equal/constexpr.cc: Likewise.
1549         * testsuite/25_algorithms/equal_range/constexpr.cc: Likewise.
1550         * testsuite/25_algorithms/fill/constexpr.cc: Likewise.
1551         * testsuite/25_algorithms/find_end/constexpr.cc: Likewise.
1552         * testsuite/25_algorithms/find_if/constexpr.cc: Likewise.
1553         * testsuite/25_algorithms/is_partitioned/constexpr.cc: Likewise.
1554         * testsuite/25_algorithms/is_permutation/constexpr.cc: Likewise.
1555         * testsuite/25_algorithms/is_sorted_until/constexpr.cc:
1556         Likewise.
1557         * testsuite/25_algorithms/lexicographical_compare/constexpr.cc:
1558         Likewise.
1559         * testsuite/25_algorithms/lower_bound/constexpr.cc: Likewise.
1560         * testsuite/25_algorithms/merge/constexpr.cc: Likewise.
1561         * testsuite/25_algorithms/mismatch/constexpr.cc: Likewise.
1562         * testsuite/25_algorithms/none_of/constexpr.cc: Likewise.
1563         * testsuite/25_algorithms/partition_copy/constexpr.cc: Likewise.
1564         * testsuite/25_algorithms/remove_copy/constexpr.cc: Likewise.
1565         * testsuite/25_algorithms/remove_copy_if/constexpr.cc: Likewise.
1566         * testsuite/25_algorithms/remove_if/constexpr.cc: Likewise.
1567         * testsuite/25_algorithms/replace_if/constexpr.cc: Likewise.
1568         * testsuite/25_algorithms/reverse/constexpr.cc: Likewise.
1569         * testsuite/25_algorithms/reverse_copy/constexpr.cc: Likewise.
1570         * testsuite/25_algorithms/rotate_copy/constexpr.cc: Likewise.
1571         * testsuite/25_algorithms/search/constexpr.cc: Likewise.
1572         * testsuite/25_algorithms/set_difference/constexpr.cc: Likewise.
1573         * testsuite/25_algorithms/set_intersection/constexpr.cc:
1574         Likewise.
1575         * testsuite/25_algorithms/set_symmetric_difference/constexpr.cc:
1576         Likewise.
1577         * testsuite/25_algorithms/set_union/constexpr.cc: Likewise.
1578         * testsuite/25_algorithms/unique_copy/constexpr.cc: Likewise.
1579         * testsuite/25_algorithms/upper_bound/constexpr.cc: Likewise.
1580
1581 2020-10-29  Jonathan Wakely  <jwakely@redhat.com>
1582
1583         * include/bits/uniform_int_dist.h (_Power_of_two): Add
1584         constexpr.
1585         (uniform_int_distribution::_S_nd): Add static_assert to ensure
1586         the wider type is twice as wide as the result type.
1587         (uniform_int_distribution::__generate_impl): Add static_assert
1588         and declare variables as constexpr where appropriate.
1589         (uniform_int_distribution:operator()): Likewise. Only consider
1590         the uniform random bit generator's range of possible results
1591         when deciding whether _S_nd can be used, not the __uctype type.
1592
1593 2020-10-29  Jonathan Wakely  <jwakely@redhat.com>
1594
1595         * include/ext/rope (_Refcount_Base::_M_ref_count): Remove
1596         volatile qualifier.
1597         (_Refcount_Base::_M_decr()): Likewise.
1598
1599 2020-10-29  Jonathan Wakely  <jwakely@redhat.com>
1600
1601         * include/bits/std_function.h (_Function_handler<void, void>):
1602         Define explicit specialization used for invalid target types.
1603         (_Base_manager::_M_manager) [!__cpp_rtti]: Return null.
1604         (function::target_type()): Check for null pointer.
1605         (function::target()): Define unconditionall. Fix bug with
1606         const_cast of function pointer type.
1607         (function::target() const): Define unconditionally, but
1608         only use RTTI if enabled.
1609         * testsuite/20_util/function/target_no_rtti.cc: New test.
1610
1611 2020-10-29  Patrick Palka  <ppalka@redhat.com>
1612
1613         * testsuite/25_algorithms/lexicographical_compare/constrained.cc:
1614         (test03): Fix initializing the vector vy with the array y of size 4.
1615
1616 2020-10-29  Jonathan Wakely  <jwakely@redhat.com>
1617
1618         * include/bits/hashtable_policy.h (_Local_iterator_base): Cast
1619         value to avoid -Wsign-compare warnings.
1620         * include/bits/regex.h (sub_match::_M_str): Avoid narrowing
1621         conversion.
1622         * include/bits/regex_compiler.tcc (_Compiler::_M_quantifier):
1623         Initialize variable to avoid -Wmaybe-uninitialized warning.
1624         * include/bits/shared_ptr_base.h (_Sp_counted_deleter::_Impl):
1625         Reorder mem-initializer-list to avoid -Wreorder warning.
1626         * include/bits/stl_tree.h (_Rb_tree_impl): Explicitly
1627         initialize base class in copy constructor.
1628         * include/debug/safe_iterator.h (_Safe_iterator): Likewise.
1629         * include/ext/debug_allocator.h: Reorder mem-initializer-list
1630         to avoid -Wreorder warning.
1631         * include/ext/throw_allocator.h (throw_allocator_limit)
1632         (throw_allocator_random): Add user-declared assignment operators
1633         to avoid -Wdeprecated-copy warnings.
1634
1635 2020-10-29  Jonathan Wakely  <jwakely@redhat.com>
1636
1637         * include/bits/uniform_int_dist.h (uniform_int_distribution):
1638         Rename _UniformRandomNumberGenerator template parameters to
1639         _UniformRandomBitGenerator, as per P0346R1.
1640
1641 2020-10-29  Jonathan Wakely  <jwakely@redhat.com>
1642
1643         * include/std/sstream (basic_stringbuf(__string_type&&, openmode)):
1644         Call _M_init_syncbuf to set up get/put areas. Also qualify
1645         std::move.
1646
1647 2020-10-28  Jonathan Wakely  <jwakely@redhat.com>
1648
1649         * config/abi/pre/gnu.ver (GLIBCXX_3.4.29): Remove duplicate
1650         patterns.
1651         (CXXABI_1.3.13): Restore missing piece.
1652
1653 2020-10-28  Thomas Rodgers  <trodgers@redhat.com>
1654
1655         * acinclude.m4 (glibcxx_SUBDIRS): Add src/c++20.
1656         * config/abi/pre/gnu.ver (GLIBCXX_3.4.29): New symbols.
1657         * configure: Regenerate.
1658         * include/std/sstream:
1659         (basic_stringbuf::basic_stringbuf(allocator const&)): New constructor.
1660         (basic_stringbuf::basic_stringbuf(openmode, allocator const&)): Likewise.
1661         (basic_stringbuf::basic_stringbuf(basic_string&&, openmode)): Likewise.
1662         (basic_stringbuf::basic_stringbuf(basic_stringbuf&&, allocator const&)):
1663         Likewise.
1664         (basic_stringbuf::get_allocator()): New method.
1665         (basic_stringbuf::view()): Likewise.
1666         (basic_istringstream::basic_istringstream(basic_string&&, openmode)):
1667         New constructor.
1668         (basic_istringstream::basic_istringstream(openmode, allocator const&)):
1669         Likewise
1670         (basic_istringstream::view()): New method.
1671         (basic_ostringstream::basic_ostringstream(basic_string&&, openmode)):
1672         New constructor.
1673         (basic_ostringstream::basic_ostringstream(openmode, allocator const&)):
1674         Likewise
1675         (basic_ostringstream::view()): New method.
1676         (basic_stringstream::basic_stringstream(basic_string&&, openmode)):
1677         New constructor.
1678         (basic_stringstream::basic_stringstream(openmode, allocator const&)):
1679         Likewise
1680         (basic_stringstream::view()): New method.
1681         * src/Makefile.in: Add c++20 directory.
1682         * src/Makefile.am: Regenerate.
1683         * src/c++20/Makefile.am: Add makefile for new sub-directory.
1684         * src/c++20/Makefile.in: Generate.
1685         * src/c++20/sstream-inst.cc: New file defining explicit
1686         instantiations for basic_stringbuf, basic_istringstream,
1687         basic_ostringstream, and basic_stringstream member functions
1688         added in C++20.
1689         * testsuite/27_io/basic_stringbuf/cons/char/2.cc: New test.
1690         * testsuite/27_io/basic_stringbuf/cons/wchar_t/2.cc: Likewise.
1691         * testsuite/27_io/basic_stringbuf/view/char/1.cc: Likewise.
1692         * testsuite/27_io/basic_stringbuf/view/wchar_t/1.cc: Likewise.
1693         * testsuite/27_io/basic_istringstream/cons/char/1.cc: Likewise.
1694         * testsuite/27_io/basic_istringstream/cons/wchar_t/1.cc: Likewise.
1695         * testsuite/27_io/basic_istringstream/view/char/1.cc: Likewise.
1696         * testsuite/27_io/basic_istringstream/view/wchar_t/1.cc: Likewise.
1697         * testsuite/27_io/basic_ostringstream/cons/char/1.cc: Likewise.
1698         * testsuite/27_io/basic_ostringstream/cons/wchar_t/1.cc: Likewise.
1699         * testsuite/27_io/basic_ostringstream/view/char/1.cc: Likewise.
1700         * testsuite/27_io/basic_ostringstream/view/wchar_t/1.cc: Likewise.
1701         * testsuite/27_io/basic_stringstream/cons/char/1.cc: Likewise.
1702         * testsuite/27_io/basic_stringstream/cons/wchar_t/1.cc: Likewise.
1703         * testsuite/27_io/basic_stringstream/view/char/1.cc: Likewise.
1704         * testsuite/27_io/basic_stringstream/view/wchar_t/1.cc: Likewise.
1705
1706 2020-10-28  Patrick Palka  <ppalka@redhat.com>
1707
1708         PR libstdc++/97613
1709         * include/std/chrono (year_month_weekday::operator sys_days):
1710         Cast the result of index() to int so that the initializer for
1711         days{} is sign-extended when it's converted to the underlying
1712         type.
1713         * testsuite/std/time/year_month_weekday/3.cc: New test.
1714
1715 2020-10-28  Jonathan Wakely  <jwakely@redhat.com>
1716
1717         * libsupc++/new_opnt.cc (new): Add comment about forced unwind
1718         exceptions.
1719
1720 2020-10-28  Jonathan Wakely  <jwakely@redhat.com>
1721
1722         PR libstdc++/94268
1723         * config/os/mingw32-w64/os_defines.h (_GLIBCXX_BUFSIZ):
1724         Define.
1725         * config/os/mingw32/os_defines.h (_GLIBCXX_BUFSIZ):
1726         Define.
1727         * include/bits/fstream.tcc: Use _GLIBCXX_BUFSIZ instead
1728         of BUFSIZ.
1729         * include/ext/stdio_filebuf.h: Likewise.
1730         * include/std/fstream (_GLIBCXX_BUFSIZ): Define.
1731
1732 2020-10-28  Jonathan Wakely  <jwakely@redhat.com>
1733
1734         PR libstdc++/95592
1735         * include/bits/valarray_after.h (_DEFINE_EXPR_UNARY_OPERATOR)
1736         (_DEFINE_EXPR_BINARY_OPERATOR, _DEFINE_EXPR_BINARY_FUNCTION):
1737         Use elaborated-type-specifier and qualified-id to avoid
1738         ambiguities with QNX system headers.
1739         * testsuite/26_numerics/valarray/95592.cc: New test.
1740
1741 2020-10-28  Jonathan Wakely  <jwakely@redhat.com>
1742
1743         PR libstdc++/95609
1744         * include/std/span (span): Reorder data members to match common
1745         implementations of struct iovec.
1746         * testsuite/23_containers/span/layout_compat.cc: New test.
1747
1748 2020-10-27  Jonathan Wakely  <jwakely@redhat.com>
1749
1750         * include/std/functional (std::_Placeholder): Define for C++98
1751         as well as later standards.
1752         * include/tr1/functional (std::placeholders::_1 etc): Declare
1753         for C++98.
1754         (tr1::_Placeholder): Replace with using-declaration for
1755         std::_Placeholder.
1756         (tr1::placeholders::_1 etc.): Replace with using-directive for
1757         std::placeholders.
1758
1759 2020-10-27  Jonathan Wakely  <jwakely@redhat.com>
1760
1761         * include/tr1/ell_integral.tcc (__ellint_rf, __ellint_rd)
1762         (__ellint_rc, __ellint_rj): Remove unused variables.
1763         * include/tr1/modified_bessel_func.tcc (__airy): Likewise.
1764
1765 2020-10-27  Jonathan Wakely  <jwakely@redhat.com>
1766
1767         * include/bits/locale_conv.h (__str_codecvt_out_all):
1768         Add cast to compare operands of the same signedness.
1769         * include/bits/locale_facets_nonio.tcc
1770         (time_get::_M_extract_wday_or_month): Likewise.
1771         * include/bits/sstream.tcc (basic_stringbuf::overflow):
1772         Likewise.
1773         * include/tr1/legendre_function.tcc (__sph_legendre): Use
1774         unsigned for loop variable.
1775
1776 2020-10-27  Jonathan Wakely  <jwakely@redhat.com>
1777
1778         * include/std/charconv (from_chars): Add noexcept to match
1779         definitions in src/c++17/floating_from_chars.cc
1780
1781 2020-10-27  Jonathan Wakely  <jwakely@redhat.com>
1782
1783         * src/c++17/fs_dir.cc (fs::directory_iterator::operator*):
1784         Add noexcept. Do not throw on precondition violation.
1785
1786 2020-10-27  Jonathan Wakely  <jwakely@redhat.com>
1787
1788         * include/bits/fs_path.h (path::_List::begin, path::_List::end):
1789         Add noexcept to match definitions in src/c++17/fs_path.cc.
1790
1791 2020-10-27  Jonathan Wakely  <jwakely@redhat.com>
1792
1793         * testsuite/experimental/memory_resource/new_delete_resource.cc:
1794         Add missing <cstdint> header.
1795         * testsuite/experimental/memory_resource/resource_adaptor.cc:
1796         Likewise.
1797
1798 2020-10-26  Jonathan Wakely  <jwakely@redhat.com>
1799
1800         * include/experimental/executor (strand::_State): Fix thinko.
1801
1802 2020-10-26  Ville Voutilainen  <ville.voutilainen@gmail.com>
1803
1804         * include/std/type_traits (__is_nt_constructible_impl): Remove.
1805         (__is_nothrow_constructible_impl): Adjust.
1806         (is_nothrow_default_constructible): Likewise.
1807         (__is_nt_assignable_impl): Remove.
1808         (__is_nothrow_assignable_impl): Adjust.
1809
1810 2020-10-26  Jonathan Wakely  <jwakely@redhat.com>
1811
1812         PR libstdc++/97570
1813         * libsupc++/new_opa.cc: Declare size_t in global namespace.
1814         Remove unused header.
1815
1816 2020-10-26  Stephan Bergmann  <sbergman@redhat.com>
1817
1818         * include/bits/shared_ptr_base.h
1819         (_Sp_counted_base::_M_add_ref_lock_nothrow(): Add noexcept to
1820         definitions to match declaration.
1821         (__shared_count(const __weak_count&, nothrow_t)): Add noexcept
1822         to declaration to match definition.
1823
1824 2020-10-23  Patrick Palka  <ppalka@redhat.com>
1825
1826         * include/std/ranges (single_view::single_view): Mark the
1827         in place constructor explicit as per LWG 3428.
1828         (take_view): Remove the constraint on the deduction guide's
1829         template parameter as per LWG 3447.
1830
1831 2020-10-23  Jonathan Wakely  <jwakely@redhat.com>
1832
1833         * include/experimental/memory_resource: Include <tuple>.
1834         (polymorphic_allocator::construct): Qualify forward_as_tuple.
1835         * include/std/memory_resource: Likewise.
1836
1837 2020-10-22  Jonathan Wakely  <jwakely@redhat.com>
1838
1839         * testsuite/30_threads/condition_variable/members/68519.cc:
1840         Define recent_epoch_float_clock::duration to meet the Cpp17Clock
1841         requirements.
1842
1843 2020-10-22  Jonathan Wakely  <jwakely@redhat.com>
1844
1845         * include/std/shared_mutex: Only include <condition_variable>
1846         when pthread_rwlock_t and POSIX timers are not available.
1847         (__cpp_lib_shared_mutex, __cpp_lib_shared_timed_mutex): Change
1848         value to be type 'long'.
1849         * include/std/version (__cpp_lib_shared_mutex)
1850         (__cpp_lib_shared_timed_mutex): Likewise.
1851
1852 2020-10-22  Jonathan Wakely  <jwakely@redhat.com>
1853
1854         * include/Makefile.am: Add new header.
1855         * include/Makefile.in: Regenerate.
1856         * include/bits/shared_ptr.h: Include <iosfwd>.
1857         * include/bits/shared_ptr_base.h: Include required headers here
1858         directly, instead of in <memory>.
1859         * include/bits/uses_allocator_args.h: New file. Move utility
1860         functions for uses-allocator construction from <memory> to here.
1861         Only define the utility functions when concepts are available.
1862         (__cpp_lib_make_obj_using_allocator): Define non-standard
1863         feature test macro.
1864         * include/std/condition_variable: Remove unused headers.
1865         * include/std/future: Likewise.
1866         * include/std/memory: Remove headers that are not needed
1867         directly, and are now inclkuded where they're needed. Include
1868         new <bits/uses_allocator_args.h> header.
1869         * include/std/memory_resource: Include only the necessary
1870         headers. Use new feature test macro to detect support for the
1871         utility functions.
1872         * include/std/scoped_allocator: Likewise.
1873         * include/std/version (__cpp_lib_make_obj_using_allocator):
1874         Define.
1875
1876 2020-10-22  Olivier Hainque  <hainque@adacore.com>
1877
1878         * crossconfig.m4: Turn vxworks matcher into vxworks*.
1879         * configure.host: Likewise.
1880         * configure: Regenerate.
1881
1882 2020-10-21  Jonathan Wakely  <jwakely@redhat.com>
1883
1884         * include/bits/shared_ptr.h (shared_ptr(const weak_ptr&, nothrow_t)):
1885         Add noexcept.
1886         * include/bits/shared_ptr_base.h (_Sp_counted_base::_M_add_ref_lock):
1887         Remove specializations and just call _M_add_ref_lock_nothrow.
1888         (__shared_count, __shared_ptr): Use nullptr for null pointer
1889         constants.
1890         (__shared_count(const __weak_count&)): Use _M_add_ref_lock_nothrow
1891         instead of _M_add_ref_lock.
1892         (__shared_count(const __weak_count&, nothrow_t)): Add noexcept.
1893         (__shared_ptr::operator bool()): Add noexcept.
1894         (__shared_ptr(const __weak_ptr&, nothrow_t)): Add noexcept.
1895
1896 2020-10-21  Jonathan Wakely  <jwakely@redhat.com>
1897
1898         PR libstdc++/97512
1899         * include/bits/ranges_util.h (tuple_size<subrange>)
1900         (tuple_element<I, cv subrange>): Move here from ...
1901         * include/std/ranges: ... here.
1902         * testsuite/std/ranges/subrange/97512.cc: New test.
1903
1904 2020-10-21  Thomas Rodgers  <trodgers@redhat.com>
1905
1906         * include/pstl/algorithm_impl.h: Update file.
1907         * include/pstl/execution_impl.h: Likewise.
1908         * include/pstl/glue_algorithm_impl.h: Likewise.
1909         * include/pstl/glue_memory_impl.h: Likewise.
1910         * include/pstl/glue_numeric_impl.h: Likewise.
1911         * include/pstl/memory_impl.h: Likewise.
1912         * include/pstl/numeric_impl.h: Likewise.
1913         * include/pstl/parallel_backend.h: Likewise.
1914         * include/pstl/parallel_backend_serial.h: Likewise.
1915         * include/pstl/parallel_backend_tbb.h: Likewise.
1916         * include/pstl/parallel_backend_utils.h: Likewise.
1917         * include/pstl/pstl_config.h: Likewise.
1918         * include/pstl/unseq_backend_simd.h: Likewise.
1919
1920 2020-10-20  François Dumont  <fdumont@gcc.gnu.org>
1921
1922         * include/bits/hashtable_policy.h
1923         (_Hash_node_value_base<>): Remove _Hash_node_base inheritance.
1924         (_Hash_node_code_cache<bool _Cache_hash_code>): New.
1925         (_Hash_node_value<typename _Value, bool _Cache_hash_code>): New.
1926         (_Hash_node<>): Inherits _Hash_node_base<> and _Hash_node_value<>.
1927         (_Map_base<>::__node_type): Remove.
1928         (_Map_base<>::iterator): Remove.
1929         (_Insert_base<>::__hash_cached): New.
1930         (_Insert_base<>::__constant_iterators): New.
1931         (_Insert_base<>::__hashtable_alloc): New.
1932         (_Insert_base<>::__node_type): Remove.
1933         (_Insert_base<>::__node_ptr): New.
1934         (_Hash_code_base<>): Remove specializations.
1935         (_Hash_code_base<>::__node_type): Remove.
1936         (_Hash_code_base<>::_M_bucket_index(const __node_type*, size_t)):
1937         Replace by...
1938         (_Hash_code_base<>::_M_bucket_index(const _Hash_node_value<>&, size_t)):
1939         ...this.
1940         (_Hash_code_base<>::_M_store_code(__node_type*, __hash_code)):
1941         Replace by...
1942         (_Hash_code_base<>::_M_store_code(_Hash_node_code_cache<>&, __hash_code)):
1943         ...this.
1944         (_Hash_code_base<>::_M_copy_code(__node_type*, const __node_type*)):
1945         Replace by...
1946         (_Hash_code_base<>::_M_copy_code(_Hash_node_code_cache<>&,
1947         const _Hash_node_code_base<>&)): ...this.
1948         (_Hashtable_base<>::__constant_iterators): Remove.
1949         (_Hashtable_base<>::__unique_keys): Remove.
1950         (_Hashtable_base<>::__node_type): Remove.
1951         (_Hashtable_base<>::iterator): Remove.
1952         (_Hashtable_base<>::const_iterator): Remove.
1953         (_Hashtable_base<>::local_iterator): Remove.
1954         (_Hashtable_base<>::const_local_iterator): Remove.
1955         (_Hashtable_base<>::__ireturn_type): Remove.
1956         (_Hashtable_base<>::_Equal_hash_code<>::_S_equals): Replace by...
1957         (_Hashtable_base<>::_S_equals(__hash_code, const _Hash_node_code_hash<>&)):
1958         ...this.
1959         (_Hashtable_base<>::_Equal_hash_code<>::_S_node_equals): Replace by...
1960         (_Hashtable_base<>::_S_node_equals(__hash_code,
1961         const _Hash_node_code_hash<>&)): ...this.
1962         (_Hashtable_base<>::_Equal_hash_code<>): Remove.
1963         (_Hashtable_base<>::_M_equals): Adapt.
1964         (_Hashtable_baxe<>::_M_node_equals): Adapt.
1965         (_Equality<>::_M_equal): Adapt.
1966         (_Hashtable_alloc<>::__node_ptr): New.
1967         (_Hashtable_alloc<>::__bucket_type): Rename into...
1968         (_Hashtable_alloc<>::__node_base_ptr): ...this.
1969         (_Hashtable_alloc<>::__bucket_alloc_type): Rename into...
1970         (_Hashtable_alloc<>::__buckets_alloc_type): ...this.
1971         (_Hashtable_alloc<>::__bucket_alloc_traits): Rename into...
1972         (_Hashtable_alloc<>::__buckets_alloc_traits): ...this.
1973         (_Hashtable_alloc<>::__buckets_ptr): New.
1974         (_Hashtable_alloc<>::_M_allocate_node): Adapt.
1975         (_Hashtable_alloc<>::_M_deallocate_node): Adapt.
1976         (_Hashtable_alloc<>::_M_deallocate_node_ptr): Adapt.
1977         (_Hashtable_alloc<>::_M_deallocate_nodes): Adapt.
1978         (_Hashtable_alloc<>::_M_allocate_buckets): Adapt.
1979         (_Hashtable_alloc<>::_M_deallocate_buckets): Adapt.
1980         * include/bits/hashtable.h (_Hashtable<>): Adapt.
1981
1982 2020-10-20  Aldy Hernandez  <aldyh@redhat.com>
1983
1984         * testsuite/21_strings/basic_string/capacity/1.cc: Pass
1985         -Wno-stringop-overflow to test.
1986
1987 2020-10-20  Jonathan Wakely  <jwakely@redhat.com>
1988
1989         PR libstdc++/95917
1990         * include/std/coroutine (__noop_coro_frame): Replace with
1991         noop_coroutine_handle::__frame.
1992         (__dummy_resume_destroy): Define inline in __frame.
1993         (__noop_coro_fr): Replace with noop_coroutine_handle::_S_fr
1994         and define as inline.
1995         * testsuite/18_support/coroutines/95917.cc: New test.
1996
1997 2020-10-20  Jonathan Wakely  <jwakely@redhat.com>
1998
1999         * include/std/coroutine (coroutine_handle<_Promise>): Remove
2000         base class. Add constructors, conversions, accessors etc. as
2001         proposed for LWG 3460.
2002         (coroutine_handle<noop_coroutine_promise>): Likewise.
2003         * testsuite/18_support/coroutines/lwg3460.cc: New test.
2004
2005 2020-10-19  Jonathan Wakely  <jwakely@redhat.com>
2006
2007         * include/bits/unique_ptr.h (make_unique_for_overwrite): Define
2008         for C++20.
2009         * testsuite/20_util/unique_ptr/creation/array_neg.cc: Remove
2010         unused header. Adjust standard reference.
2011         * testsuite/20_util/unique_ptr/creation/for_overwrite.cc: New test.
2012         * testsuite/20_util/unique_ptr/creation/for_overwrite__neg.cc: New test.
2013
2014 2020-10-19  Jonathan Wakely  <jwakely@redhat.com>
2015
2016         * include/std/tuple (_Head_base<Idx, Head, true>): Use reserved
2017         form of __no_unique_address__ attribute because
2018         no_unique_address is not reserved prior to C++20.
2019
2020 2020-10-19  Jonathan Wakely  <jwakely@redhat.com>
2021
2022         * include/bits/node_handle.h (_Node_handle_common): Replace
2023         std::optional with custom type.
2024         * testsuite/20_util/variant/exception_safety.cc: Add missing
2025         header include.
2026
2027 2020-10-19  Jonathan Wakely  <jwakely@redhat.com>
2028
2029         * include/precompiled/expc++.h: Removed.
2030
2031 2020-10-17  Ville Voutilainen  <ville.voutilainen@gmail.com>
2032
2033         PR libstdc++/97449
2034         * include/std/variant
2035         (__gen_vtable_impl<>::_S_apply_single_alt):
2036         Diagnose visitor return type mismatches here..
2037         (__gen_vtable_impl</*base case*/>::_S_apply):
2038         ..not here.
2039
2040 2020-10-15  Jonathan Wakely  <jwakely@redhat.com>
2041
2042         * include/std/concepts: Fix typos in copyright notice.
2043         * include/std/ranges: Likewise.
2044
2045 2020-10-14  Jonathan Wakely  <jwakely@redhat.com>
2046
2047         PR libstdc++/97415
2048         * include/std/sstream (basic_stringbuf::str()): Check for
2049         null egptr() before comparing to non-null pptr().
2050
2051 2020-10-14  Jonathan Wakely  <jwakely@redhat.com>
2052
2053         * testsuite/21_strings/basic_string/modifiers/assign/char/move_assign_optim.cc:
2054         Do not generate debug info.
2055         * testsuite/21_strings/basic_string/modifiers/assign/wchar_t/move_assign_optim.cc:
2056         Likewise.
2057
2058 2020-10-14  Jonathan Wakely  <jwakely@redhat.com>
2059
2060         * include/bits/basic_string.h (basic_string(const Alloc&))
2061         (basic_string(const basic_string&)
2062         (basic_string(const CharT*, size_type, const Alloc&))
2063         (basic_string(const CharT*, const Alloc&))
2064         (basic_string(size_type, CharT, const Alloc&))
2065         (basic_string(initializer_list<CharT>, const Alloc&))
2066         (basic_string(InputIterator, InputIterator, const Alloc&)):
2067         Define inline in class body.
2068         * include/bits/basic_string.tcc (basic_string(const Alloc&))
2069         (basic_string(const basic_string&)
2070         (basic_string(const CharT*, size_type, const Alloc&))
2071         (basic_string(const CharT*, const Alloc&))
2072         (basic_string(size_type, CharT, const Alloc&))
2073         (basic_string(initializer_list<CharT>, const Alloc&))
2074         (basic_string(InputIterator, InputIterator, const Alloc&)):
2075         Move definitions into class body.
2076
2077 2020-10-14  Jonathan Wakely  <jwakely@redhat.com>
2078
2079         * testsuite/lib/libstdc++.exp (check_effective_target_cxx11-abi):
2080         Add comments about which test flags get used by the check.
2081
2082 2020-10-14  Jonathan Wakely  <jwakely@redhat.com>
2083
2084         * testsuite/21_strings/basic_string/allocator/char/copy.cc: Make
2085         comment more precise about what isn't supported by COW strings.
2086         * testsuite/21_strings/basic_string/allocator/char/copy_assign.cc:
2087         Likewise.
2088         * testsuite/21_strings/basic_string/allocator/char/move.cc:
2089         Likewise.
2090         * testsuite/21_strings/basic_string/allocator/char/move_assign.cc:
2091         Likewise.
2092         * testsuite/21_strings/basic_string/allocator/char/noexcept.cc:
2093         Likewise.
2094         * testsuite/21_strings/basic_string/allocator/char/operator_plus.cc:
2095         Likewise.
2096         * testsuite/21_strings/basic_string/allocator/char/swap.cc:
2097         Likewise.
2098         * testsuite/21_strings/basic_string/allocator/wchar_t/copy.cc:
2099         Likewise.
2100         * testsuite/21_strings/basic_string/allocator/wchar_t/copy_assign.cc:
2101         Likewise.
2102         * testsuite/21_strings/basic_string/allocator/wchar_t/move.cc:
2103         Likewise.
2104         * testsuite/21_strings/basic_string/allocator/wchar_t/move_assign.cc:
2105         Likewise.
2106         * testsuite/21_strings/basic_string/allocator/wchar_t/noexcept.cc:
2107         Likewise.
2108         * testsuite/21_strings/basic_string/allocator/wchar_t/operator_plus.cc:
2109         Likewise.
2110         * testsuite/21_strings/basic_string/allocator/wchar_t/swap.cc:
2111         Likewise.
2112
2113 2020-10-14  Jonathan Wakely  <jwakely@redhat.com>
2114
2115         * testsuite/21_strings/basic_string/allocator/char/minimal.cc:
2116         Do not require cxx11-abi effective target.
2117         * testsuite/21_strings/basic_string/allocator/wchar_t/minimal.cc:
2118         Likewise.
2119         * testsuite/27_io/basic_fstream/cons/base.cc: Likewise.
2120
2121 2020-10-14  Jonathan Wakely  <jwakely@redhat.com>
2122
2123         * include/bits/basic_string.h [!_GLIBCXX_USE_CXX11_ABI]
2124         (basic_string(const _CharT*, const _Alloc&)): Constrain to
2125         require an allocator-like type to fix CTAD ambiguity (LWG 3706).
2126         * testsuite/21_strings/basic_string/cons/char/deduction.cc:
2127         Remove dg-skip-if.
2128         * testsuite/21_strings/basic_string/cons/wchar_t/deduction.cc:
2129         Likewise.
2130
2131 2020-10-13  Nuno Lopes  <nuno.lopes@ist.utl.pt>
2132
2133         * include/bits/stl_algo.h (any_of): Fix incorrect description
2134         in comment.
2135
2136 2020-10-13  Jonathan Wakely  <jwakely@redhat.com>
2137
2138         * doc/xml/manual/evolution.xml: Document some API changes
2139         and deprecations.
2140         * doc/xml/manual/intro.xml: Document LWG 2499.
2141         * doc/xml/manual/status_cxx2020.xml: Update status.
2142         * doc/html/*: Regenerate.
2143
2144 2020-10-13  Jonathan Wakely  <jwakely@redhat.com>
2145
2146         * doc/xml/book.txml: Remove trailing whitespace.
2147         * doc/xml/chapter.txml: Likewise.
2148         * doc/xml/class.txml: Likewise.
2149         * doc/xml/gnu/fdl-1.3.xml: Likewise.
2150         * doc/xml/gnu/gpl-3.0.xml: Likewise.
2151         * doc/xml/manual/abi.xml: Likewise.
2152         * doc/xml/manual/algorithms.xml: Likewise.
2153         * doc/xml/manual/allocator.xml: Likewise.
2154         * doc/xml/manual/appendix_contributing.xml: Likewise.
2155         * doc/xml/manual/appendix_free.xml: Likewise.
2156         * doc/xml/manual/appendix_porting.xml: Likewise.
2157         * doc/xml/manual/atomics.xml: Likewise.
2158         * doc/xml/manual/auto_ptr.xml: Likewise.
2159         * doc/xml/manual/backwards_compatibility.xml: Likewise.
2160         * doc/xml/manual/bitmap_allocator.xml: Likewise.
2161         * doc/xml/manual/build_hacking.xml: Likewise.
2162         * doc/xml/manual/codecvt.xml: Likewise.
2163         * doc/xml/manual/concurrency.xml: Likewise.
2164         * doc/xml/manual/concurrency_extensions.xml: Likewise.
2165         * doc/xml/manual/configure.xml: Likewise.
2166         * doc/xml/manual/containers.xml: Likewise.
2167         * doc/xml/manual/ctype.xml: Likewise.
2168         * doc/xml/manual/debug.xml: Likewise.
2169         * doc/xml/manual/debug_mode.xml: Likewise.
2170         * doc/xml/manual/diagnostics.xml: Likewise.
2171         * doc/xml/manual/documentation_hacking.xml: Likewise.
2172         * doc/xml/manual/evolution.xml: Likewise.
2173         * doc/xml/manual/internals.xml: Likewise.
2174         * doc/xml/manual/intro.xml: Likewise.
2175         * doc/xml/manual/io.xml: Likewise.
2176         * doc/xml/manual/iterators.xml: Likewise.
2177         * doc/xml/manual/locale.xml: Likewise.
2178         * doc/xml/manual/localization.xml: Likewise.
2179         * doc/xml/manual/messages.xml: Likewise.
2180         * doc/xml/manual/mt_allocator.xml: Likewise.
2181         * doc/xml/manual/numerics.xml: Likewise.
2182         * doc/xml/manual/parallel_mode.xml: Likewise.
2183         * doc/xml/manual/policy_data_structures.xml: Likewise.
2184         * doc/xml/manual/prerequisites.xml: Likewise.
2185         * doc/xml/manual/shared_ptr.xml: Likewise.
2186         * doc/xml/manual/spine.xml: Likewise.
2187         * doc/xml/manual/status_cxxtr1.xml: Likewise.
2188         * doc/xml/manual/status_cxxtr24733.xml: Likewise.
2189         * doc/xml/manual/strings.xml: Likewise.
2190         * doc/xml/manual/support.xml: Likewise.
2191         * doc/xml/manual/test.xml: Likewise.
2192         * doc/xml/manual/test_policy_data_structures.xml: Likewise.
2193         * doc/xml/manual/using.xml: Likewise.
2194         * doc/xml/manual/using_exceptions.xml: Likewise.
2195         * doc/xml/manual/utilities.xml: Likewise.
2196         * doc/html/*: Regenerate.
2197
2198 2020-10-12  Patrick Palka  <ppalka@redhat.com>
2199
2200         * include/std/ranges (take_while_view::begin): Constrain the
2201         const overload further as per LWG 3450.
2202         (take_while_view::end): Likewise.
2203         * testsuite/std/ranges/adaptors/take_while.cc: Add test for LWG
2204         3450.
2205
2206 2020-10-12  Patrick Palka  <ppalka@redhat.com>
2207
2208         PR libstdc++/95322
2209         * include/std/ranges (take_view::_CI): Define this alias
2210         template as per LWG 3449 and remove ...
2211         (take_view::_Sentinel::_CI): ... this type alias.
2212         (take_view::_Sentinel::operator==): Adjust use of _CI
2213         accordingly.  Define a second overload that accepts an iterator
2214         of the opposite constness as per LWG 3449.
2215         (take_while_view::_Sentinel::operator==): Likewise.
2216         * testsuite/std/ranges/adaptors/95322.cc: Add tests for LWG 3449.
2217
2218 2020-10-12  Jonathan Wakely  <jwakely@redhat.com>
2219
2220         * doc/doxygen/user.cfg.in: Update to Doxygen 1.8.20 format.
2221
2222 2020-10-12  Jonathan Wakely  <jwakely@redhat.com>
2223
2224         * doc/doxygen/user.cfg.in (PREDEFINED): Use __cplusplus=201703L
2225         so that C++17 features are documented.
2226
2227 2020-10-12  Jonathan Wakely  <jwakely@redhat.com>
2228
2229         * include/bits/stl_algobase.h (copy, move, copy_backward)
2230         (move_backward): Fix documentation for returned iterator.
2231
2232 2020-10-12  Martin Sebor  <msebor@redhat.com>
2233
2234         PR c++/97201
2235         * libsupc++/new (operator new): Add attribute alloc_size and malloc.
2236
2237 2020-10-11  Clement Chigot  <clement.chigot@atos.net>
2238
2239         * config/os/aix/t-aix: Add complementary mode object file to
2240         libstdc++fs.a
2241
2242 2020-10-10  Jonathan Wakely  <jwakely@redhat.com>
2243
2244         PR libstdc++/97362
2245         * doc/html/manual/source_code_style.html: Regenerate.
2246         * doc/xml/manual/appendix_contributing.xml: Add __deref to
2247         BADNAMES.
2248         * include/debug/functions.h (_Irreflexive_checker::__deref):
2249         Rename to __ref.
2250         * testsuite/17_intro/badnames.cc: Check __deref.
2251
2252 2020-10-10  Ville Voutilainen  <ville.voutilainen@gmail.com>
2253
2254         * include/std/variant (__check_visitor_result):
2255         Use size_t for indexes.
2256         (__check_visitor_results): Likewise.
2257
2258 2020-10-09  Ville Voutilainen  <ville.voutilainen@gmail.com>
2259
2260         PR libstdc++/95904
2261         * include/std/variant (__deduce_visit_result): Add a nested ::type.
2262         (__gen_vtable_impl</*base case*/>::_S_apply):
2263         Check the visitor return type.
2264         (__same_types): New.
2265         (__check_visitor_result): Likewise.
2266         (__check_visitor_results): Likewise.
2267         (visit(_Visitor&&, _Variants&&...)): Use __check_visitor_results
2268         in case we're visiting just one variant.
2269         * testsuite/20_util/variant/visit_neg.cc: Adjust.
2270
2271 2020-10-09  Jonathan Wakely  <jwakely@redhat.com>
2272
2273         PR libstdc++/97311
2274         * include/bits/random.tcc (seed_seq::generate): Use uint32_t for
2275         calculations. Also split the first loop into three loops to
2276         avoid branching on k on every iteration, resolving PR 94823.
2277         * testsuite/26_numerics/random/seed_seq/97311.cc: New test.
2278         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-erro
2279         line number.
2280
2281 2020-10-09  Daniel Lemire  <lemire@gmail.com>
2282
2283         * include/bits/uniform_int_dist.h (uniform_int_distribution::_S_nd):
2284         New member function implementing Lemire's "nearly divisionless"
2285         algorithm.
2286         (uniform_int_distribution::operator()): Use _S_nd when the range
2287         of the URBG is the full width of the result type.
2288
2289 2020-10-09  Jonathan Wakely  <jwakely@redhat.com>
2290
2291         * testsuite/Makefile.am: Set and export variable separately.
2292         * testsuite/Makefile.in: Regenerate.
2293
2294 2020-10-09  Jonathan Wakely  <jwakely@redhat.com>
2295
2296         * scripts/check_performance: Use gnu++11 instead of gnu++0x.
2297         * testsuite/Makefile.am (check-performance): Export CXXFLAGS to
2298         child process.
2299         * testsuite/Makefile.in: Regenerate.
2300
2301 2020-10-09  Jonathan Wakely  <jwakely@redhat.com>
2302
2303         * testsuite/performance/26_numerics/random_dist.cc: New test.
2304
2305 2020-10-09  Jonathan Wakely  <jwakely@redhat.com>
2306
2307         * testsuite/util/testsuite_performance.h (report_header): Remove
2308         unused variable.
2309
2310 2020-10-08  Patrick Palka  <ppalka@redhat.com>
2311
2312         PR libstdc++/95788
2313         * include/bits/ranges_uninitialized.h:
2314         (__construct_at_fn::operator()): Rewrite in terms of
2315         std::construct_at.  Declare it conditionally noexcept.  Qualify
2316         calls to declval in its requires-clause.
2317         * testsuite/20_util/specialized_algorithms/construct_at/95788.cc:
2318         New test.
2319
2320 2020-10-08  Jonathan Wakely  <jwakely@redhat.com>
2321
2322         PR libstdc++/82584
2323         * include/bits/random.tcc
2324         (discrete_distribution::param_type::_M_initialize)
2325         (piecewise_constant_distribution::param_type::_M_initialize)
2326         (piecewise_linear_distribution::param_type::_M_initialize):
2327         Add assertions for positive sums..
2328         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error
2329         line.
2330
2331 2020-10-08  Jonathan Wakely  <jwakely@redhat.com>
2332
2333         * include/bits/ios_base.h (ios_base::failure): Add constructors
2334         takeing error_code argument. Add code() member function.
2335         * testsuite/27_io/ios_base/failure/cxx11.cc: Allow test to
2336         run for the old ABI but do not check for derivation from
2337         std::system_error.
2338         * testsuite/27_io/ios_base/failure/error_code.cc: New test.
2339
2340 2020-10-08  Jonathan Wakely  <jwakely@redhat.com>
2341
2342         * include/bits/random.h (__detail::_Mod): Revert last change.
2343         (__detail::__mod): Do not use _Mod for a==0 case.
2344         * testsuite/26_numerics/random/linear_congruential_engine/operators/call.cc:
2345         Check other cases with a==0. Also check runtime results.
2346         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error
2347         line.
2348
2349 2020-10-07  Jonathan Wakely  <jwakely@redhat.com>
2350
2351         * include/bits/random.h (__detail::_Mod): Avoid divide by zero.
2352         * testsuite/26_numerics/random/linear_congruential_engine/operators/call.cc:
2353         New test.
2354
2355 2020-10-07  Jonathan Wakely  <jwakely@redhat.com>
2356
2357         * include/bits/random.h (seed_seq(initializer_list<T>)): Rename
2358         parameter to use reserved name.
2359         * include/bits/ranges_algo.h (shift_left, shift_right): Rename
2360         template parameters to use reserved name.
2361         * libsupc++/exception_ptr.h (exception_ptr): Likewise for
2362         parameters and local variables.
2363         * testsuite/17_intro/names.cc: Check "il". Do not check "d" and
2364         "y" in C++20 mode.
2365
2366 2020-10-06  Jonathan Wakely  <jwakely@redhat.com>
2367
2368         PR libstdc++/90295
2369         * config/abi/pre/gnu.ver (CXXABI_1.3.13): New symbol version.
2370         (exception_ptr::_M_addref(), exception_ptr::_M_release()):
2371         Export symbols.
2372         * libsupc++/eh_ptr.cc (exception_ptr::exception_ptr()):
2373         Remove out-of-line definition.
2374         (exception_ptr::exception_ptr(const exception_ptr&)):
2375         Likewise.
2376         (exception_ptr::~exception_ptr()): Likewise.
2377         (exception_ptr::operator=(const exception_ptr&)):
2378         Likewise.
2379         (exception_ptr::swap(exception_ptr&)): Likewise.
2380         (exception_ptr::_M_addref()): Add branch prediction.
2381         * libsupc++/exception_ptr.h (exception_ptr::operator bool):
2382         Add noexcept.
2383         [!_GLIBCXX_EH_PTR_COMPAT] (operator==, operator!=): Define
2384         inline as hidden friends. Remove declarations at namespace
2385         scope.
2386         (exception_ptr::exception_ptr()): Define inline.
2387         (exception_ptr::exception_ptr(const exception_ptr&)):
2388         Likewise.
2389         (exception_ptr::~exception_ptr()): Likewise.
2390         (exception_ptr::operator=(const exception_ptr&)):
2391         Likewise.
2392         (exception_ptr::swap(exception_ptr&)): Likewise.
2393         * testsuite/util/testsuite_abi.cc: Add CXXABI_1.3.13.
2394         * testsuite/18_support/exception_ptr/90295.cc: New test.
2395
2396 2020-10-06  Jonathan Wakely  <jwakely@redhat.com>
2397
2398         * include/std/ranges (join_view): Remove deduction guide.
2399         (views::join): Add explicit template argument list to prevent
2400         deducing the wrong type.
2401         * testsuite/std/ranges/adaptors/join.cc: Move test for LWG 3474
2402         here, from ...
2403         * testsuite/std/ranges/adaptors/join_lwg3474.cc: Removed.
2404
2405 2020-10-05  Jonathan Wakely  <jwakely@redhat.com>
2406
2407         * include/bits/regex.h: Use __int_traits<int> instead of
2408         std::numeric_limits<int>.
2409         * include/bits/uniform_int_dist.h: Use __int_traits<T>::__max
2410         instead of std::numeric_limits<T>::max().
2411         * include/bits/hashtable_policy.h: Use size_t(-1) instead of
2412         std::numeric_limits<size_t>::max().
2413         * include/std/regex: Include <ext/numeric_traits.h>.
2414         * include/std/string_view: Use typedef for __int_traits<int>.
2415         * src/c++11/hashtable_c++0x.cc: Use size_t(-1) instead of
2416         std::numeric_limits<size_t>::max().
2417         * testsuite/std/ranges/iota/96042.cc: Include <limits>.
2418         * testsuite/std/ranges/iota/difference_type.cc: Likewise.
2419         * testsuite/std/ranges/subrange/96042.cc: Likewise.
2420
2421 2020-10-05  Jonathan Wakely  <jwakely@redhat.com>
2422
2423         * include/std/numeric: Move all #include directives to the top
2424         of the header.
2425         * testsuite/26_numerics/gcd/gcd_neg.cc: Adjust dg-error line
2426         numbers.
2427         * testsuite/26_numerics/lcm/lcm_neg.cc: Likewise.
2428
2429 2020-10-05  Jonathan Wakely  <jwakely@redhat.com>
2430
2431         * config/abi/pre/gnu.ver: Add new symbol.
2432         * include/bits/functexcept.h (__throw_bad_array_new_length):
2433         Declare new function.
2434         * include/ext/malloc_allocator.h (malloc_allocator::allocate):
2435         Throw bad_array_new_length for impossible sizes (LWG 3190).
2436         * include/ext/new_allocator.h (new_allocator::allocate):
2437         Likewise.
2438         * include/std/memory_resource (polymorphic_allocator::allocate)
2439         (polymorphic_allocator::allocate_object): Use new function,
2440         __throw_bad_array_new_length.
2441         * src/c++11/functexcept.cc (__throw_bad_array_new_length):
2442         Define.
2443         * testsuite/20_util/allocator/lwg3190.cc: New test.
2444
2445 2020-10-05  Mike Crowe  <mac@mcrowe.com>
2446
2447         PR libstdc++/91486
2448         * include/bits/atomic_futex.h:
2449         (__atomic_futex_unsigned::_M_load_when_equal_until): Use target
2450         clock duration type when rounding.
2451         * testsuite/30_threads/async/async.cc (test_pr91486_wait_for):
2452         Rename from test_pr91486.
2453         (float_steady_clock): New class for test.
2454         (test_pr91486_wait_until): New test.
2455
2456 2020-10-05  Mike Crowe  <mac@mcrowe.com>
2457
2458         * testsuite/20_util/duration_cast/rounding_c++11.cc: Copy
2459         rounding.cc and alter to support compilation for C++11 and to
2460         test std::chrono::__detail::ceil.
2461
2462 2020-10-02  Jonathan Wakely  <jwakely@redhat.com>
2463
2464         * testsuite/29_atomics/atomic_float/value_init.cc: Use float
2465         instead of double so that __atomic_load_8 isn't needed.
2466
2467 2020-10-02  Jonathan Wakely  <jwakely@redhat.com>
2468
2469         * testsuite/18_support/96817.cc: Use terminate handler that
2470         calls _Exit(0).
2471
2472 2020-10-02  Patrick Palka  <ppalka@redhat.com>
2473
2474         * include/bits/stl_iterator.h (reverse_iterator::iter_move):
2475         Define for C++20 as per P0896.
2476         (reverse_iterator::iter_swap): Likewise.
2477         (move_iterator::operator*): Apply P0896 changes for C++20.
2478         (move_iterator::operator[]): Likewise.
2479         * testsuite/24_iterators/reverse_iterator/cust.cc: New test.
2480
2481 2020-10-01  Jonathan Wakely  <jwakely@redhat.com>
2482
2483         * config/cpu/arm/cxxabi_tweaks.h (_GLIBCXX_GUARD_TEST_AND_ACQUIRE):
2484         Do not try to dereference return value of __atomic_load_n.
2485
2486 2020-09-30  Jonathan Wakely  <jwakely@redhat.com>
2487
2488         * config/cpu/arm/cxxabi_tweaks.h (_GLIBCXX_GUARD_TEST_AND_ACQUIRE):
2489         (_GLIBCXX_GUARD_SET_AND_RELEASE): Define for EABI.
2490
2491 2020-09-30  Jonathan Wakely  <jwakely@redhat.com>
2492
2493         * include/bits/c++config (_GLIBCXX_HAVE_BUILTIN_IS_SAME):
2494         Define for GCC 11 or when !__is_identifier(__is_same).
2495         (_GLIBCXX_BUILTIN_IS_SAME_AS): Remove.
2496         * include/std/type_traits (is_same, is_same_v): Replace uses
2497         of _GLIBCXX_BUILTIN_IS_SAME_AS.
2498
2499 2020-09-28  Patrick Palka  <ppalka@redhat.com>
2500
2501         * include/std/ranges (filter_view): Declare the data member
2502         _M_base last instead of first, and adjust constructors' member
2503         initializer lists accordingly.
2504         (transform_view): Likewise.
2505         (take_view): Likewise.
2506         (take_while_view): Likewise.
2507         (drop_view): Likewise.
2508         (drop_while_view): Likewise.
2509         (join_view): Likewise.
2510         (split_view): Likewise (and tweak nearby formatting).
2511         (reverse_view): Likewise.
2512         * testsuite/std/ranges/adaptors/sizeof.cc: Update expected
2513         sizes.
2514
2515 2020-09-28  Patrick Palka  <ppalka@redhat.com>
2516
2517         * testsuite/std/ranges/adaptors/sizeof.cc: New test.
2518
2519 2020-09-28  Patrick Palka  <ppalka@redhat.com>
2520
2521         * include/bits/ranges_util.h (subrange::_M_end): Give it
2522         [[no_unique_address]].
2523         * testsuite/std/ranges/subrange/sizeof.cc: New test.
2524
2525 2020-09-28  Patrick Palka  <ppalka@redhat.com>
2526
2527         * include/std/ranges (iota_view::_M_bound): Give it
2528         [[no_unique_address]].
2529         * testsuite/std/ranges/iota/iota_view.cc: Check that an
2530         unbounded iota_view has minimal size.
2531
2532 2020-09-27  Clement Chigot  <clement.chigot@atos.net>
2533
2534         * config/os/aix/t-aix: Use $(AR) without -X32_64.
2535
2536 2020-09-26  Jonathan Wakely  <jwakely@redhat.com>
2537
2538         PR libstdc++/96817
2539         * include/ext/atomicity.h (__gnu_cxx::__is_single_threaded()):
2540         New function wrapping __libc_single_threaded if available.
2541         (__exchange_and_add_dispatch, __atomic_add_dispatch): Use it.
2542         * libsupc++/guard.cc (__cxa_guard_acquire, __cxa_guard_abort)
2543         (__cxa_guard_release): Likewise.
2544         * testsuite/18_support/96817.cc: New test.
2545
2546 2020-09-25  Jonathan Wakely  <jwakely@redhat.com>
2547
2548         * libsupc++/Makefile.am: Remove redundant -std=gnu++1z flags.
2549         * libsupc++/Makefile.in: Regenerate.
2550
2551 2020-09-24  Antony Polukhin  <antoshkka@gmail.com>
2552
2553         PR libstdc++/71579
2554         * include/std/type_traits (invoke_result, is_invocable)
2555         (is_invocable_r, is_nothrow_invocable, is_nothrow_invocable_r):
2556         Add static_asserts to make sure that the arguments of the type
2557         traits are not misused with incomplete types.
2558         * testsuite/20_util/invoke_result/incomplete_args_neg.cc: New test.
2559         * testsuite/20_util/is_invocable/incomplete_args_neg.cc: New test.
2560         * testsuite/20_util/is_invocable/incomplete_neg.cc: New test.
2561         * testsuite/20_util/is_nothrow_invocable/incomplete_args_neg.cc:
2562         New test.
2563         * testsuite/20_util/is_nothrow_invocable/incomplete_neg.cc: Check
2564         for error on incomplete type usage in trait.
2565
2566 2020-09-24  Patrick Palka  <ppalka@redhat.com>
2567
2568         * include/std/ranges (__detail::__boxable): Split out the
2569         associated constraints of __box into here.
2570         (__detail::__box): Use the __boxable concept.  Define a leaner
2571         partial specialization for semiregular types.
2572         (single_view::_M_value): Give it [[no_unique_address]].
2573         (filter_view::_M_pred): Likewise.
2574         (transform_view::_M_fun): Likewise.
2575         (take_while_view::_M_pred): Likewise.
2576         (drop_while_view::_M_pred):: Likewise.
2577         * testsuite/std/ranges/adaptors/detail/semiregular_box.cc: New
2578         test.
2579
2580 2020-09-24  Jonathan Wakely  <jwakely@redhat.com>
2581
2582         * doc/xml/manual/configure.xml: Correct name of option.
2583         * doc/html/*: Regenerate.
2584
2585 2020-09-22  Jonathan Wakely  <jwakely@redhat.com>
2586
2587         PR libstdc++/97167
2588         * src/c++17/fs_path.cc (path::_Parser::root_path()): Check
2589         for empty string before inspecting the first character.
2590         * testsuite/27_io/filesystem/path/append/source.cc: Append
2591         empty string_view to path.
2592
2593 2020-09-22  Glen Joseph Fernandes  <glenjofe@gmail.com>
2594
2595         * include/bits/align.h (align): Fix overflow handling.
2596         * testsuite/20_util/align/3.cc: New test.
2597
2598 2020-09-22  Jonathan Wakely  <jwakely@redhat.com>
2599
2600         * include/Makefile.am: Add new headers and adjust for renamed
2601         header.
2602         * include/Makefile.in: Regenerate.
2603         * include/bits/iterator_concepts.h: Adjust for renamed header.
2604         * include/bits/range_access.h (ranges::*): Move to new
2605         <bits/ranges_base.h> header.
2606         * include/bits/ranges_algobase.h: Include new <bits/ranges_base.h>
2607         header instead of <ranges>.
2608         * include/bits/ranges_algo.h: Include new <bits/ranges_util.h>
2609         header.
2610         * include/bits/range_cmp.h: Moved to...
2611         * include/bits/ranges_cmp.h: ...here.
2612         * include/bits/ranges_base.h: New header.
2613         * include/bits/ranges_util.h: New header.
2614         * include/experimental/string_view: Include new
2615         <bits/ranges_base.h> header.
2616         * include/std/functional: Adjust for renamed header.
2617         * include/std/ranges (ranges::view_base, ranges::enable_view)
2618         (ranges::dangling, ranges::borrowed_iterator_t): Move to new
2619         <bits/ranges_base.h> header.
2620         (ranges::view_interface, ranges::subrange)
2621         (ranges::borrowed_subrange_t): Move to new <bits/ranges_util.h>
2622         header.
2623         * include/std/span: Include new <bits/ranges_base.h> header.
2624         * include/std/string_view: Likewise.
2625         * testsuite/24_iterators/back_insert_iterator/pr93884.cc: Add
2626         missing <ranges> header.
2627         * testsuite/24_iterators/front_insert_iterator/pr93884.cc:
2628         Likewise.
2629
2630 2020-09-22  Jonathan Wakely  <jwakely@redhat.com>
2631
2632         PR libstdc++/96803
2633         * include/std/tuple
2634         (_Tuple_impl(allocator_arg_t, Alloc, const _Tuple_impl<U...>&)):
2635         Use correct value category in __use_alloc call.
2636         * testsuite/20_util/tuple/cons/96803.cc: Check with constructors
2637         that require correct value category to be used.
2638
2639 2020-09-22  Patrick Palka  <ppalka@redhat.com>
2640
2641         * include/std/span (span::front): Remove static_assert.
2642         (span::back): Likewise.
2643         (span::operator[]): Likewise.
2644         * testsuite/23_containers/span/back_neg.cc: Rewrite to verify
2645         that we check the preconditions of back() only when it's called.
2646         * testsuite/23_containers/span/front_neg.cc: Likewise for
2647         front().
2648         * testsuite/23_containers/span/index_op_neg.cc: Likewise for
2649         operator[].
2650
2651 2020-09-22  Patrick Palka  <ppalka@redhat.com>
2652
2653         * include/bits/stl_algo.h (__sample): Exit early when the
2654         input range is empty.
2655         * testsuite/25_algorithms/sample/3.cc: New test.
2656
2657 2020-09-22  Patrick Palka  <ppalka@redhat.com>
2658
2659         * include/bits/stl_algo.h (for_each_n): Mark constexpr for C++20.
2660         (search): Likewise for the overload that takes a searcher.
2661         * testsuite/25_algorithms/for_each/constexpr.cc: Test constexpr
2662         std::for_each_n.
2663         * testsuite/25_algorithms/search/constexpr.cc: Test constexpr
2664         std::search overload that takes a searcher.
2665
2666 2020-09-21  Jonathan Wakely  <jwakely@redhat.com>
2667
2668         * include/bits/c++config (__replacement_assert): Add noreturn
2669         attribute.
2670         (__glibcxx_assert_impl): Use __builtin_expect to hint that the
2671         assertion is expected to pass.
2672
2673 2020-09-21  Jonathan Wakely  <jwakely@redhat.com>
2674
2675         * include/std/ranges (drop_view::begin()): Adjust constraints
2676         to match the correct condition for O(1) ranges::next (LWG 3482).
2677         * testsuite/std/ranges/adaptors/drop.cc: Check that iterator is
2678         cached for non-sized_range.
2679
2680 2020-09-21  Jonathan Wakely  <jwakely@redhat.com>
2681
2682         * include/std/ranges (transform_view, elements_view): Relax
2683         constraints on operator- for iterators, as per LWG 3483.
2684         * testsuite/std/ranges/adaptors/elements.cc: Check that we
2685         can take the difference of two iterators from a non-random
2686         access range.
2687         * testsuite/std/ranges/adaptors/transform.cc: Likewise.
2688
2689 2020-09-21  Jonathan Wakely  <jwakely@redhat.com>
2690
2691         PR libstdc++/97132
2692         * include/bits/align.h (align) [!_GLIBCXX_USE_C99_STDINT_TR1]:
2693         Remove unused code.
2694         (assume_aligned): Do not use __builtin_assume_aligned during
2695         constant evaluation.
2696         * testsuite/20_util/assume_aligned/1.cc: Improve test.
2697         * testsuite/20_util/assume_aligned/97132.cc: New test.
2698
2699 2020-09-20  Jonathan Wakely  <jwakely@redhat.com>
2700
2701         PR libstdc++/97101
2702         * include/std/functional (bind_front): Fix order of parameters
2703         in is_nothrow_constructible_v specialization.
2704         * testsuite/20_util/function_objects/bind_front/97101.cc: New test.
2705
2706 2020-09-11  Thomas Rodgers  <trodgers@redhat.com>
2707
2708         * include/std/memory: Move #include <bits/align.h> inside C++11
2709         conditional includes.
2710
2711 2020-09-11  Thomas Rodgers  <trodgers@redhat.com>
2712
2713         * include/Makefile.am (bits_headers): Add new header.
2714         * include/Makefile.in: Regenerate.
2715         * include/bits/align.h: New file.
2716         * include/std/memory (align): Move definition to bits/align.h.
2717         (assume_aligned): Likewise.
2718
2719 2020-09-11  Jonathan Wakely  <jwakely@redhat.com>
2720
2721         * include/std/chrono [C++17] (chrono::__detail::ceil): Add
2722         using declaration to make chrono::ceil available for internal
2723         use with a consistent name.
2724         (chrono::__detail::__ceil_impl): New function template.
2725         (chrono::__detail::ceil): Use __ceil_impl to compare and
2726         increment the value. Remove SFINAE constraint.
2727
2728 2020-09-11  Jonathan Wakely  <jwakely@redhat.com>
2729
2730         * include/bits/regex_error.h (__throw_regex_error): Fix
2731         parameter declaration and use reserved attribute names.
2732
2733 2020-09-11  Mike Crowe  <mac@mcrowe.com>
2734
2735         * include/std/condition_variable (condition_variable::wait_until):
2736         Convert delta to steady_clock duration before adding to current
2737         steady_clock time to avoid rounding errors described in PR68519.
2738         (condition_variable::wait_for): Simplify calculation of absolute
2739         time by using chrono::__detail::ceil in both overloads.
2740         * testsuite/30_threads/condition_variable/members/68519.cc:
2741         (test_wait_for): Renamed from test01. Replace unassigned val
2742         variable with constant false. Reduce scope of mx and cv
2743         variables to just test_wait_for function.
2744         (test_wait_until): Add new test case.
2745
2746 2020-09-11  Mike Crowe  <mac@mcrowe.com>
2747
2748         PR libstdc++/91486
2749         * include/bits/atomic_futex.h
2750         (__atomic_futex_unsigned::_M_load_when_equal_for)
2751         (__atomic_futex_unsigned::_M_load_when_equal_until): Use
2752         __detail::ceil to convert delta to the reference clock
2753         duration type to avoid resolution problems.
2754         * include/std/chrono (__detail::ceil): Move implementation
2755         of std::chrono::ceil into private namespace so that it's
2756         available to pre-C++17 code.
2757         * testsuite/30_threads/async/async.cc (test_pr91486):
2758         Test __atomic_futex_unsigned::_M_load_when_equal_for.
2759
2760 2020-09-11  Mike Crowe  <mac@mcrowe.com>
2761
2762         * include/bits/atomic_futex.h
2763         (__atomic_futex_unsigned::_M_load_when_equal_until): Add
2764         loop on generic _Clock to check the timeout against _Clock
2765         again after _M_load_when_equal_until returns indicating a
2766         timeout.
2767         * testsuite/30_threads/async/async.cc: Invent slow_clock
2768         that runs at an eleventh of steady_clock's speed. Use it
2769         to test the user-supplied-clock variant of
2770         __atomic_futex_unsigned::_M_load_when_equal_until works
2771         generally with test03 and loops correctly when the timeout
2772         time hasn't been reached in test04.
2773
2774 2020-09-11  Mike Crowe  <mac@mcrowe.com>
2775
2776         PR libstdc++/93542
2777         * include/bits/atomic_futex.h (__atomic_futex_unsigned): Change
2778         __clock_t typedef to use steady_clock so that unknown clocks are
2779         synced to it rather than system_clock. Change existing __clock_t
2780         overloads of _M_load_and_text_until_impl and
2781         _M_load_when_equal_until to use system_clock explicitly. Remove
2782         comment about DR 887 since these changes address that problem as
2783         best as we currently able.
2784
2785 2020-09-11  Mike Crowe  <mac@mcrowe.com>
2786
2787         PR libstdc++/93542
2788         * config/abi/pre/gnu.ver: Update for addition of
2789         __atomic_futex_unsigned_base::_M_futex_wait_until_steady.
2790         * include/bits/atomic_futex.h (__atomic_futex_unsigned_base):
2791         Add comments to clarify that _M_futex_wait_until and
2792         _M_load_and_test_until use CLOCK_REALTIME.
2793         (__atomic_futex_unsigned_base::_M_futex_wait_until_steady)
2794         (__atomic_futex_unsigned_base::_M_load_and_text_until_steady):
2795         New member functions that use CLOCK_MONOTONIC.
2796         (__atomic_futex_unsigned_base::_M_load_and_test_until_impl)
2797         (__atomic_futex_unsigned_base::_M_load_when_equal_until): Add
2798         overloads that accept a steady_clock time_point and use the
2799         new member functions.
2800         * src/c++11/futex.cc: Include headers required for
2801         clock_gettime.
2802         (futex_clock_monotonic_flag): New constant to tell futex to
2803         use CLOCK_MONOTONIC to match existing futex_clock_realtime_flag.
2804         (futex_clock_monotonic_unavailable): New global to store the
2805         result of trying to use CLOCK_MONOTONIC.
2806         (__atomic_futex_unsigned_base::_M_futex_wait_until_steady): Add
2807         new variant of _M_futex_wait_until that uses CLOCK_MONOTONIC to
2808         support waiting using steady_clock.
2809
2810 2020-09-11  Mike Crowe  <mac@mcrowe.com>
2811
2812         * src/c++11/futex.cc: Add new constants for required futex
2813         flags.  Add futex_clock_realtime_unavailable flag to store
2814         result of trying to use FUTEX_CLOCK_REALTIME.
2815         (__atomic_futex_unsigned_base::_M_futex_wait_until): Try to
2816         use FUTEX_WAIT_BITSET with FUTEX_CLOCK_REALTIME and only
2817         fall back to using gettimeofday and FUTEX_WAIT if that's not
2818         supported.
2819
2820 2020-09-11  Mike Crowe  <mac@mcrowe.com>
2821
2822         * testsuite/30_threads/async/async.cc (test02): Test steady_clock
2823         with std::future::wait_until.
2824         (test03): Add new test templated on clock type waiting for future
2825         associated with async to resolve.
2826         (main): Call test03 to test both system_clock and steady_clock.
2827
2828 2020-09-11  Torbjörn SVENSSON  <torbjorn.svensson@st.com>
2829             Christophe Lyon  <christophe.lyon@linaro.org>
2830
2831         * libsupc++/eh_call.cc: Avoid warning with -fno-exceptions.
2832
2833 2020-09-11  Torbjörn SVENSSON  <torbjorn.svensson@st.com>
2834             Christophe Lyon  <christophe.lyon@linaro.org>
2835
2836         * libsupc++/eh_call.cc: Avoid warning with -fno-exceptions.
2837
2838 2020-09-11  Christophe Lyon  <christophe.lyon@linaro.org>
2839
2840         * include/bits/regex_error.h: Avoid warning with -fno-exceptions.
2841
2842 2020-09-10  Jonathan Wakely  <jwakely@redhat.com>
2843
2844         * include/bits/locale_conv.h (__do_str_codecvt, __str_codecvt_in_all):
2845         Add casts to compare types of the same signedness.
2846
2847 2020-09-10  Jonathan Wakely  <jwakely@redhat.com>
2848
2849         * include/bits/ranges_algobase.h (__equal_fn): Remove unused
2850         typedef.
2851
2852 2020-09-10  Jonathan Wakely  <jwakely@redhat.com>
2853
2854         * include/std/version (__cpp_lib_array_constexpr):
2855         (__cpp_lib_constexpr_char_traits): Only define C++17 value when
2856         compiling C++17.
2857
2858 2020-09-10  Jonathan Wakely  <jwakely@redhat.com>
2859
2860         * include/experimental/bits/shared_ptr.h (shared_ptr(auto_ptr&&))
2861         (operator=(auto_ptr&&)): Add diagnostic pragmas to suppress
2862         warnings for uses of std::auto_ptr.
2863         * include/experimental/type_traits (is_literal_type_v):
2864         Likewise, for use of std::is_literal_type.
2865         * include/std/condition_variable (condition_variable_any::_Unlock):
2866         Likewise, for use of std::uncaught_exception.
2867
2868 2020-09-10  Jonathan Wakely  <jwakely@redhat.com>
2869
2870         * include/bits/fs_path.h (path::_List::type()): Avoid narrowing
2871         conversion.
2872         * include/std/chrono (operator+(const year&, const years&)):
2873         Likewise.
2874
2875 2020-09-10  Jonathan Wakely  <jwakely@redhat.com>
2876
2877         * include/bits/codecvt.h (codecvt_byname): Remove names of
2878         unused parameters.
2879
2880 2020-09-10  Jonathan Wakely  <jwakely@redhat.com>
2881
2882         * include/bits/locale_facets_nonio.tcc: Adjust whitespace.
2883
2884 2020-09-10  Krystian Kuźniarek  <krystian.kuzniarek@gmail.com>
2885
2886         * include/c_global/cmath (__lerp): Avoid -Wparentheses warnings.
2887
2888 2020-09-10  Krystian Kuźniarek  <krystian.kuzniarek@gmail.com>
2889
2890         * include/bits/atomic_base.h: Fix -Wunused-variable
2891         warnings.
2892         * include/ext/new_allocator.h: Fix -Wunused-parameter
2893         warnings.
2894
2895 2020-09-10  Jonathan Wakely  <jwakely@redhat.com>
2896
2897         * include/bits/stl_iterator.h (counted_iterator): Add assertions
2898         to check preconditions added by LWG 3472.
2899
2900 2020-09-10  Jonathan Wakely  <jwakely@redhat.com>
2901
2902         PR libstdc++/94160
2903         * src/c++17/memory_resource.cc (munge_options): Round
2904         max_blocks_per_chunk to a multiple of four.
2905         (__pool_resource::_M_alloc_pools()): Simplify slightly.
2906         * testsuite/20_util/unsynchronized_pool_resource/allocate.cc:
2907         Check that valid pointers are returned when small values are
2908         used for max_blocks_per_chunk.
2909
2910 2020-09-10  Jonathan Wakely  <jwakely@redhat.com>
2911
2912         PR libstdc++/96942
2913         * include/std/memory_resource (monotonic_buffer_resource::do_allocate):
2914         Use __builtin_expect when checking if a new buffer needs to be
2915         allocated from the upstream resource, and for checks for edge
2916         cases like zero sized buffers and allocations.
2917         * src/c++17/memory_resource.cc (aligned_size): New class template.
2918         (aligned_ceil): New helper function to round up to a given
2919         alignment.
2920         (monotonic_buffer_resource::chunk): Replace _M_size and _M_align
2921         with an aligned_size member. Remove _M_canary member. Change _M_next
2922         to pointer instead of unaligned buffer.
2923         (monotonic_buffer_resource::chunk::allocate): Round up to multiple
2924         of 64 instead of to power of two. Check for size overflow. Remove
2925         redundant check for minimum required alignment.
2926         (monotonic_buffer_resource::chunk::release): Adjust for changes
2927         to data members.
2928         (monotonic_buffer_resource::_M_new_buffer): Use aligned_ceil.
2929         (big_block): Replace _M_size and _M_align with aligned_size
2930         member.
2931         (big_block::big_block): Check for size overflow.
2932         (big_block::size, big_block::align): Adjust to use aligned_size.
2933         (big_block::alloc_size): Use aligned_ceil.
2934         (munge_options): Use aligned_ceil.
2935         (__pool_resource::allocate): Use big_block::align for alignment.
2936         * testsuite/20_util/monotonic_buffer_resource/allocate.cc: Check
2937         upstream resource gets expected values for impossible sizes.
2938         * testsuite/20_util/unsynchronized_pool_resource/allocate.cc:
2939         Likewise. Adjust checks for expected alignment in existing test.
2940
2941 2020-09-07  Jonathan Wakely  <jwakely@redhat.com>
2942
2943         * include/std/chrono (duration::_S_gcd): Use invariant that
2944         neither value is zero initially.
2945
2946 2020-09-07  Jonathan Wakely  <jwakely@redhat.com>
2947
2948         * include/std/ranges (__box): Simplify constraints as per LWG 3477.
2949
2950 2020-09-03  Jonathan Wakely  <jwakely@redhat.com>
2951
2952         PR libstdc++/96592
2953         * include/std/tuple (_TupleConstraints<true, T...>): Use
2954         alternative is_constructible instead of std::is_constructible.
2955         * testsuite/20_util/tuple/cons/96592.cc: New test.
2956
2957 2020-09-03  Jonathan Wakely  <jwakely@redhat.com>
2958
2959         * include/std/chrono (duration::_S_gcd): Use iterative algorithm
2960         for C++14 and later.
2961         * include/std/numeric (__detail::__gcd): Replace recursive
2962         Euclidean algorithm with iterative version of binary GCD algorithm.
2963         * testsuite/26_numerics/gcd/1.cc: Test additional inputs.
2964         * testsuite/26_numerics/gcd/gcd_neg.cc: Adjust dg-error lines.
2965         * testsuite/26_numerics/lcm/lcm_neg.cc: Likewise.
2966         * testsuite/experimental/numeric/gcd.cc: Test additional inputs.
2967         * testsuite/26_numerics/gcd/2.cc: New test.
2968
2969 2020-09-02  Jonathan Wakely  <jwakely@redhat.com>
2970
2971         PR libstdc++/92978
2972         * testsuite/experimental/numeric/92978.cc: Use experimental::lcm
2973         not std::lcm.
2974
2975 2020-09-02  Jonathan Wakely  <jwakely@redhat.com>
2976
2977         PR libstdc++/96851
2978         * include/bits/cpp_type_traits.h (__is_memcmp_ordered):
2979         New trait that says if memcmp can be used for ordering.
2980         (__is_memcmp_ordered_with): Likewise, for two types.
2981         * include/bits/deque.tcc (__lex_cmp_dit): Use new traits
2982         instead of __is_byte and __numeric_traits.
2983         (__lexicographical_compare_aux1): Likewise.
2984         * include/bits/ranges_algo.h (__lexicographical_compare_fn):
2985         Likewise.
2986         * include/bits/stl_algobase.h (__lexicographical_compare_aux1)
2987         (__is_byte_iter): Likewise.
2988         * include/std/array (operator<=>): Likewise. Only use memcmp
2989         when std::is_constant_evaluated() is false.
2990         * testsuite/23_containers/array/comparison_operators/96851.cc:
2991         New test.
2992         * testsuite/23_containers/array/tuple_interface/get_neg.cc:
2993         Adjust dg-error line numbers.
2994
2995 2020-09-02  Jonathan Wakely  <jwakely@redhat.com>
2996
2997         * include/bits/stl_iterator.h: Include <bits/exception_defines.h>
2998         for definitions of __try, __catch and __throw_exception_again.
2999         (counted_iterator::operator++(int)): Use __throw_exception_again
3000         instead of throw.
3001         * libsupc++/new: Include <bits/exception.h> not <exception>.
3002         * libsupc++/new_opvnt.cc: Include <bits/exception_defines.h>.
3003         * testsuite/18_support/destroying_delete.cc: Include
3004         <type_traits> for std::is_same_v definition.
3005         * testsuite/20_util/variant/index_type.cc: Qualify size_t.
3006
3007 2020-09-01  Jonathan Wakely  <jwakely@redhat.com>
3008
3009         PR libstdc++/71960
3010         * include/bits/c++config (__glibcxx_assert_impl): Remove
3011         do-while so that uses of the macro need to add it.
3012         (__glibcxx_assert): Rename macro for runtime assertions
3013         to __glibcxx_assert_2.
3014         (__glibcxx_assert_1): Define macro for constexpr assertions.
3015         (__glibcxx_assert): Define macro for constexpr and runtime
3016         assertions.
3017         * include/bits/range_access.h (ranges::advance): Remove
3018         redundant precondition checks during constant evaluation.
3019         * include/parallel/base.h (_GLIBCXX_PARALLEL_ASSERT): Always
3020         use do-while in macro expansion.
3021         * include/std/ranges (iota_view::iota_view(W, B)): Remove
3022         redundant braces.
3023
3024 2020-09-01  Jonathan Wakely  <jwakely@redhat.com>
3025
3026         * include/std/chrono (duration::_S_gcd(intmax_t, intmax_t)):
3027         New helper function for finding GCD of two positive intmax_t
3028         values.
3029         (duration::__divide): New helper alias for dividing one period
3030         by another.
3031         (duration::__is_harmonic): Use __divide not ratio_divide.
3032         (duration(const duration<R2, P2>&)): Require the duration rep
3033         types to be convertible.
3034         * testsuite/20_util/duration/cons/dr2094.cc: New test.
3035         * testsuite/20_util/duration/requirements/reduced_period.cc:
3036         Fix definition of unused member functions in test type.
3037         * testsuite/20_util/duration/requirements/typedefs_neg2.cc:
3038         Adjust expected errors.
3039
3040 2020-08-29  Jonathan Wakely  <jwakely@redhat.com>
3041
3042         * include/std/numeric (__detail::__absu(bool)): Make deleted
3043         function a function template, so it will be chosen for calls
3044         with an explicit template argument list.
3045         * testsuite/26_numerics/gcd/gcd_neg.cc: Add dg-prune-output.
3046         * testsuite/26_numerics/lcm/lcm_neg.cc: Likewise.
3047
3048 2020-08-28  Jonathan Wakely  <jwakely@redhat.com>
3049
3050         * include/std/chrono (common_type): Fix partial specializations
3051         for a single duration type to use the common_type of the rep.
3052         (duration::operator+, duration::operator-): Fix return types
3053         to also use the common_type of the rep.
3054         * testsuite/20_util/duration/requirements/reduced_period.cc:
3055         Check duration using a rep that has common_type specialized.
3056
3057 2020-08-28  Jonathan Wakely  <jwakely@redhat.com>
3058
3059         PR libstdc++/92978
3060         * include/std/numeric (__abs_integral): Replace with ...
3061         (__detail::__absu): New function template that returns an
3062         unsigned type, guaranteeing it can represent the most
3063         negative signed value.
3064         (__detail::__gcd, __detail::__lcm): Require arguments to
3065         be unsigned and therefore already non-negative.
3066         (gcd, lcm): Convert arguments to absolute value as unsigned
3067         type before calling __detail::__gcd or __detail::__lcm.
3068         * include/experimental/numeric (gcd, lcm): Likewise.
3069         * testsuite/26_numerics/gcd/gcd_neg.cc: Adjust expected
3070         errors.
3071         * testsuite/26_numerics/lcm/lcm_neg.cc: Likewise.
3072         * testsuite/26_numerics/gcd/92978.cc: New test.
3073         * testsuite/26_numerics/lcm/92978.cc: New test.
3074         * testsuite/experimental/numeric/92978.cc: New test.
3075
3076 2020-08-27  Jonathan Wakely  <jwakely@redhat.com>
3077
3078         * include/std/chrono (__duration_common_type): Ensure the
3079         reduced ratio is used. Remove unused partial specialization
3080         using __failure_type.
3081         (common_type): Pass reduced ratios to __duration_common_type.
3082         Add partial specializations for simple cases involving a single
3083         duration or time_point type.
3084         (duration::period): Use reduced ratio.
3085         (duration::operator+(), duration::operator-()): Return duration
3086         type using the reduced ratio.
3087         * testsuite/20_util/duration/requirements/typedefs_neg2.cc:
3088         Adjust expected errors.
3089         * testsuite/20_util/duration/requirements/reduced_period.cc: New test.
3090
3091 2020-08-27  Patrick Palka  <ppalka@redhat.com>
3092
3093         * include/std/chrono (year_month::operator+): Properly handle a
3094         month value of 0 by casting the month value to int before
3095         subtracting 1 from it so that the difference is sign-extended in
3096         the subsequent addition.
3097         * testsuite/std/time/year_month/1.cc: Test adding months to a
3098         year_month whose month component is below or above the
3099         normalized range of [1,12].
3100
3101 2020-08-27  Patrick Palka  <ppalka@redhat.com>
3102
3103         * include/std/chrono
3104         (__detail::__months_years_conversion_disambiguator): Define.
3105         (year_month::operator+=): Templatize the 'months'-based overload
3106         so that the 'years'-based overload is selected in case of
3107         equally-ranked implicit conversion sequences to both 'months'
3108         and 'years' from the supplied argument.
3109         (year_month::operator-=): Likewise.
3110         (year_month::operator+): Likewise.
3111         (year_month::operator-): Likewise.
3112         (year_month_day::operator+=): Likewise.
3113         (year_month_day::operator-=): Likewise.
3114         (year_month_day::operator+): Likewise.
3115         (year_month_day::operator-): Likewise.
3116         (year_month_day_last::operator+=): Likewise.
3117         (year_month_day_last::operator-=): Likewise.
3118         (year_month_day_last::operator+): Likewise
3119         (year_month_day_last::operator-): Likewise.
3120         (year_month_day_weekday::operator+=): Likewise
3121         (year_month_day_weekday::operator-=): Likewise.
3122         (year_month_day_weekday::operator+): Likewise.
3123         (year_month_day_weekday::operator-): Likewise.
3124         (year_month_day_weekday_last::operator+=): Likewise
3125         (year_month_day_weekday_last::operator-=): Likewise.
3126         (year_month_day_weekday_last::operator+): Likewise.
3127         (year_month_day_weekday_last::operator-): Likewise.
3128         (testsuite/std/time/year_month/2.cc): New test.
3129         (testsuite/std/time/year_month_day/2.cc): New test.
3130         (testsuite/std/time/year_month_day_last/2.cc): New test.
3131         (testsuite/std/time/year_month_weekday/2.cc): New test.
3132         (testsuite/std/time/year_month_weekday_last/2.cc): New test.
3133         * testsuite/std/time/year_month/2.cc: New file.
3134         * testsuite/std/time/year_month_day/2.cc: New file.
3135         * testsuite/std/time/year_month_day_last/2.cc: New file.
3136         * testsuite/std/time/year_month_weekday/2.cc: New file.
3137         * testsuite/std/time/year_month_weekday_last/2.cc: New file.
3138
3139 2020-08-27  Patrick Palka  <ppalka@redhat.com>
3140
3141         PR libstdc++/95322
3142         * include/std/ranges (transform_view::sentinel::__distance_from):
3143         Give this a deduced return type.
3144         (transform_view::sentinel::operator-): Adjust the return type so
3145         that it's based on the constness of the iterator rather than
3146         that of the sentinel.
3147         * testsuite/std/ranges/adaptors/95322.cc: Refer to LWG 3488.
3148
3149 2020-08-27  Patrick Palka  <ppalka@redhat.com>
3150
3151         * include/std/ranges (elements_view::begin): Adjust constraints.
3152         (elements_view::end): Likewise.
3153         (elements_view::_Sentinel::operator==): Templatize to take both
3154         _Iterator<true> and _Iterator<false>.
3155         (elements_view::_Sentinel::operator-): Likewise.
3156         * testsuite/std/ranges/adaptors/elements.cc: Add testcase for
3157         the example from P1994R1.
3158         * testsuite/std/ranges/adaptors/lwg3406.cc: New test.
3159
3160 2020-08-27  Patrick Palka  <ppalka@redhat.com>
3161
3162         * include/std/ranges (elements_view::end): Replace these two
3163         overloads with four new overloads.
3164         (elements_view::_Iterator::operator==): Remove.
3165         (elements_view::_Iterator::operator-): Likewise.
3166         (elements_view::_Sentinel): Define.
3167
3168 2020-08-26  Jonathan Wakely  <jwakely@redhat.com>
3169
3170         * include/std/tuple (_Tuple_impl): Whitespaces changes for
3171         consistent indentation. Also use __enable_if_t alias template.
3172
3173 2020-08-26  Jonathan Wakely  <jwakely@redhat.com>
3174
3175         PR libstdc++/96803
3176         * include/std/tuple
3177         (_Tuple_impl(allocator_arg_t, Alloc, const _Tuple_impl<U...>&)):
3178         Replace parameter pack with a type parameter and a pack and pass
3179         the first type to __use_alloc.
3180         * testsuite/20_util/tuple/cons/96803.cc: New test.
3181
3182 2020-08-26  Patrick Palka  <ppalka@redhat.com>
3183
3184         * include/std/chrono (year_month_weekday::operator==): Compare
3185         weekday_indexed instead of weekday.
3186         * testsuite/std/time/year_month_weekday/1.cc: Augment testcase.
3187
3188 2020-08-26  Jonathan Wakely  <jwakely@redhat.com>
3189
3190         * include/bits/hashtable_policy.h (_Hash_code_base): Change
3191         index of _Hashtable_ebo_helper base class.
3192         * testsuite/23_containers/unordered_map/dup_types.cc: New test.
3193
3194 2020-08-26  Jonathan Wakely  <jwakely@redhat.com>
3195
3196         PR libstdc++/71960
3197         * include/experimental/string_view (basic_string_view):
3198         Enable debug assertions.
3199         * include/std/string_view (basic_string_view):
3200         Likewise.
3201
3202 2020-08-26  François Dumont  <fdumont@gcc.gnu.org>
3203
3204         * include/bits/hashtable_policy.h (_Hashtable<>): Rename _H1 into _Hash
3205         _H2 into _RangeHash and _Hash into _Unused.
3206         (_Hastable_base<>): Likewise.
3207         (_Map_base<>): Likewise.
3208         (_Insert_base<>): Likewise.
3209         (_Insert<>): Likewise.
3210         (_Rehash_base<>): Likewise.
3211         (_Local_iterator_base<>): Likewise.
3212         (_Hash_code_base<>): Likewise.
3213         (_Hash_code_base<_Key, _Value, _ExtractKey, _H1, _H2, _Hash, false>):
3214         Remove.
3215         (_Hash_code_base<_Key, _Value, _ExtractKey, _H1, _H2, _Hash, true>):
3216         Remove.
3217         (_Hash_code_base<_Key, _Value, _ExtractKey, _Hash, _RangeHas, _Unused,
3218         bool>): Remove _Hashtable_ebo_helper<2, _RangeHash> base type..
3219         (_Hash_code_base<>::_M_bucket_index(const _Key&, __hash_code, size_t)):
3220         Replace by...
3221         (_Hash_code_base<>::_M_bucket_index(__hash_code, size_t)): ...this.
3222         (_Local_iterator<>): Remove _H1 and _H2 template parameters.
3223         (_Local_const_iterator<>): Likewise.
3224         (_Equality<>): Likewise.
3225         (_Map_base<>::operator[](const key_type&): Adapt.
3226         (_Map_base<>::operator[](key_type&&): Adapt.
3227         (_Identity::operator()): Add noexcept.
3228         (_Select1st::operator()): Likewise.
3229         (_Hash_code_base<>): Remove _Hashtable_ebo_helper<0, _ExtractKey> base
3230         type.
3231         (_Hash_code_base::_M_extract): Remove.
3232         * include/bits/hashtable.h (_Hashtable<>): Remove _H1 and _H2 template
3233         parameters. Remove _ExtractKey from constructors.
3234         (_Hashtable<>::_M_insert_unique_node(const key_type&, size_t,
3235         __hash_code, __node_type*, size_t)): Replace by...
3236         (_Hashtable<>::_M_insert_unique_node(size_t, __hash_code,
3237          __node_type*, size_t)): ...this.
3238         (_Hashtable<>::_M_insert_muti_node(__node_type*, const key_type&,
3239         __hash_code, __node_type*)): Replace by...
3240         (_Hashtable<>::_M_insert_multi_node(__node_type*, __hash_code,
3241         __node_type*)): ...this.
3242         (_Hashtable<>::__key_extract): Remove.
3243         * include/bits/node_handle.h: Adapt.
3244
3245 2020-08-25  Jonathan Wakely  <jwakely@redhat.com>
3246
3247         * testsuite/21_strings/debug/iterator_self_move_assign_neg.cc: Removed.
3248         * testsuite/21_strings/debug/self_move_assign_neg.cc: Removed.
3249         * testsuite/23_containers/deque/debug/iterator_self_move_assign_neg.cc: Removed.
3250         * testsuite/23_containers/deque/debug/self_move_assign_neg.cc: Removed.
3251         * testsuite/23_containers/forward_list/debug/iterator_self_move_assign_neg.cc: Removed.
3252         * testsuite/23_containers/forward_list/debug/self_move_assign_neg.cc: Removed.
3253         * testsuite/23_containers/list/debug/iterator_self_move_assign_neg.cc: Removed.
3254         * testsuite/23_containers/list/debug/self_move_assign_neg.cc: Removed.
3255         * testsuite/23_containers/map/debug/iterator_self_move_assign_neg.cc: Removed.
3256         * testsuite/23_containers/map/debug/self_move_assign_neg.cc: Removed.
3257         * testsuite/23_containers/multimap/debug/iterator_self_move_assign_neg.cc: Removed.
3258         * testsuite/23_containers/multimap/debug/self_move_assign_neg.cc: Removed.
3259         * testsuite/23_containers/multiset/debug/iterator_self_move_assign_neg.cc: Removed.
3260         * testsuite/23_containers/multiset/debug/self_move_assign_neg.cc: Removed.
3261         * testsuite/23_containers/set/debug/iterator_self_move_assign_neg.cc: Removed.
3262         * testsuite/23_containers/set/debug/self_move_assign_neg.cc: Removed.
3263         * testsuite/23_containers/unordered_map/debug/iterator_self_move_assign_neg.cc: Removed.
3264         * testsuite/23_containers/unordered_map/debug/self_move_assign_neg.cc: Removed.
3265         * testsuite/23_containers/unordered_multimap/debug/iterator_self_move_assign_neg.cc:
3266         Removed.
3267         * testsuite/23_containers/unordered_multimap/debug/self_move_assign_neg.cc: Removed.
3268         * testsuite/23_containers/unordered_multiset/debug/iterator_self_move_assign_neg.cc:
3269         Removed.
3270         * testsuite/23_containers/unordered_multiset/debug/self_move_assign_neg.cc: Removed.
3271         * testsuite/23_containers/unordered_set/debug/iterator_self_move_assign_neg.cc: Removed.
3272         * testsuite/23_containers/unordered_set/debug/self_move_assign_neg.cc: Removed.
3273         * testsuite/23_containers/vector/debug/iterator_self_move_assign_neg.cc: Removed.
3274         * testsuite/23_containers/vector/debug/self_move_assign_neg.cc: Removed.
3275
3276 2020-08-25  Patrick Palka  <ppalka@redhat.com>
3277
3278         * include/std/chrono (year_month_weekday::ok): Fix assert.
3279
3280 2020-08-25  Jonathan Wakely  <jwakely@redhat.com>
3281
3282         * include/std/future (future, shared_future. promise): Add
3283         is_destructible assertion (LWG 3466). Adjust string-literal for
3284         !is_array and !is_function assertions.
3285         * testsuite/30_threads/future/requirements/lwg3458.cc: Check
3286         types with no accessible destructor. Adjust expected errors.
3287         * testsuite/30_threads/promise/requirements/lwg3466.cc:
3288         Likewise.
3289         * testsuite/30_threads/shared_future/requirements/lwg3458.cc:
3290         Likewise.
3291
3292 2020-08-25  Patrick Palka  <ppalka@redhat.com>
3293             Ed Smith-Rowland  <3dw4rd@verizon.net>
3294             Jonathan Wakely  <jwakely@redhat.com>
3295
3296         * include/std/chrono (time_point::operator++)
3297         (time_point::operator--): Define.
3298         (utc_clock, tai_clock, gps_clock): Forward declare.
3299         (utc_time, utc_seconds, tai_time, tai_seconds, gps_time)
3300         (gps_seconds): Define.
3301         (is_clock<utc_clock>, is_clock<tai_clock>, is_clock<gps_clock>)
3302         (is_clock_v<utc_clock>, is_clock_v<tai_clock>)
3303         (is_clock_v<gps_clock>): Define these specializations.
3304         (leap_second_info): Define.
3305         (day, month, year, weekday, weekday_indexed)
3306         (weekday_last, month_day, month_day_last, month_weekday)
3307         (month_weekday_last, year_month, year_month_day)
3308         (year_month_day_last, year_month_weekday, year_month_weekday_last):
3309         Declare and later define.
3310         (last_spec, last, __detail::__days_per_month)
3311         (__detail::__days_per_month, __detail::__last_day): Define.
3312         (January, February, March, April, May, June, July, August)
3313         (September, October, November, December, Sunday, Monday, Tuesday)
3314         (Wednesday, Thursday, Friday, Saturday): Define.
3315         (weekday::operator[]): Define out-of-line.
3316         (year_month_day::_S_from_days, year_month_day::M_days_since_epoch):
3317         Likewise.
3318         (year_month_day::year_month_day, year_month_day::ok): Likewise.
3319         (__detail::__pow10, hh_mm_ss): Define.
3320         (literals::chrono_literals::operator""d)
3321         (literals::chrono_literals::operator""y): Define.
3322         (is_am, is_pm, make12, make24): Define.
3323         * testsuite/20_util/time_point/4.cc: New test.
3324         * testsuite/std/time/day/1.cc: New test.
3325         * testsuite/std/time/hh_mm_ss/1.cc: New test.
3326         * testsuite/std/time/is_am/1.cc: New test.
3327         * testsuite/std/time/is_pm/1.cc: New test.
3328         * testsuite/std/time/make12/1.cc: New test.
3329         * testsuite/std/time/make24/1.cc: New test.
3330         * testsuite/std/time/month/1.cc: New test.
3331         * testsuite/std/time/month_day/1.cc: New test.
3332         * testsuite/std/time/month_day_last/1.cc: New test.
3333         * testsuite/std/time/month_weekday/1.cc: New test.
3334         * testsuite/std/time/month_weekday_last/1.cc: New test.
3335         * testsuite/std/time/weekday/1.cc: New test.
3336         * testsuite/std/time/weekday_indexed/1.cc: New test.
3337         * testsuite/std/time/weekday_last/1.cc: New test.
3338         * testsuite/std/time/year/1.cc: New test.
3339         * testsuite/std/time/year_month/1.cc: New test.
3340         * testsuite/std/time/year_month_day/1.cc: New test.
3341         * testsuite/std/time/year_month_day_last/1.cc: New test.
3342         * testsuite/std/time/year_month_weekday/1.cc: New test.
3343         * testsuite/std/time/year_month_weekday_last/1.cc: New test.
3344
3345 2020-08-24  Jonathan Wakely  <jwakely@redhat.com>
3346
3347         * include/std/ranges (join_view): Add deduction guide (LWG 3474).
3348         * testsuite/std/ranges/adaptors/join_lwg3474.cc: New test.
3349
3350 2020-08-24  Jonathan Wakely  <jwakely@redhat.com>
3351
3352         * include/bits/iterator_concepts.h (indirectly_readable): Add
3353         partial specializations to resolve ambiguities (LWG 3446).
3354         * testsuite/24_iterators/associated_types/readable.traits.cc:
3355         Check types with both value_type and element_type.
3356
3357 2020-08-24  Jonathan Wakely  <jwakely@redhat.com>
3358
3359         * include/std/ranges (ranges::iota_view::size()): Perform all
3360         calculations in the right unsigned types.
3361         * testsuite/std/ranges/iota/size.cc: New test.
3362
3363 2020-08-24  Jonathan Wakely  <jwakely@redhat.com>
3364
3365         PR libstdc++/96766
3366         * include/std/variant (_Variant_storage): Replace implicit
3367         conversions from size_t to __index_type with explicit casts.
3368
3369 2020-08-24  Jonathan Wakely  <jwakely@redhat.com>
3370
3371         * testsuite/30_threads/packaged_task/cons/alloc.cc: Run for
3372         C++11 and skip for C++17 or later.
3373
3374 2020-08-24  Corentin Gay  <gay@adacore.com>
3375
3376         * testsuite/20_util/shared_ptr/atomic/3.cc: Do not require POSIX
3377         threads and add -pthread only on targets supporting them.
3378         * testsuite/20_util/shared_ptr/thread/default_weaktoshared.cc:
3379         Likewise.
3380         * testsuite/20_util/shared_ptr/thread/mutex_weaktoshared.cc:
3381         Likewise.
3382         * testsuite/30_threads/async/42819.cc: Likewise.
3383         * testsuite/30_threads/async/49668.cc: Likewise.
3384         * testsuite/30_threads/async/54297.cc: Likewise.
3385         * testsuite/30_threads/async/any.cc: Likewise.
3386         * testsuite/30_threads/async/async.cc: Likewise.
3387         * testsuite/30_threads/async/except.cc: Likewise.
3388         * testsuite/30_threads/async/launch.cc: Likewise.
3389         * testsuite/30_threads/async/lwg2021.cc: Likewise.
3390         * testsuite/30_threads/async/sync.cc: Likewise. : Likewise.
3391         * testsuite/30_threads/call_once/39909.cc: Likewise.
3392         * testsuite/30_threads/call_once/49668.cc: Likewise.
3393         * testsuite/30_threads/call_once/60497.cc: Likewise.
3394         * testsuite/30_threads/call_once/call_once1.cc: Likewise.
3395         * testsuite/30_threads/call_once/dr2442.cc: Likewise.
3396         * testsuite/30_threads/condition_variable/54185.cc: Likewise.
3397         * testsuite/30_threads/condition_variable/cons/1.cc: Likewise.
3398         * testsuite/30_threads/condition_variable/members/1.cc: Likewise.
3399         * testsuite/30_threads/condition_variable/members/2.cc: Likewise.
3400         * testsuite/30_threads/condition_variable/members/3.cc: Likewise.
3401         * testsuite/30_threads/condition_variable/members/53841.cc: Likewise.
3402         * testsuite/30_threads/condition_variable/members/68519.cc: Likewise.
3403         * testsuite/30_threads/condition_variable/native_handle/typesizes.cc:
3404         Likewise.
3405         * testsuite/30_threads/condition_variable_any/50862.cc: Likewise.
3406         * testsuite/30_threads/condition_variable_any/53830.cc: Likewise.
3407         * testsuite/30_threads/condition_variable_any/cond.cc: Likewise.
3408         * testsuite/30_threads/condition_variable_any/cons/1.cc: Likewise.
3409         * testsuite/30_threads/condition_variable_any/members/1.cc: Likewise.
3410         * testsuite/30_threads/condition_variable_any/members/2.cc: Likewise.
3411         * testsuite/30_threads/future/cons/move.cc: Likewise.
3412         * testsuite/30_threads/future/members/45133.cc: Likewise.
3413         * testsuite/30_threads/future/members/get.cc: Likewise.
3414         * testsuite/30_threads/future/members/get2.cc: Likewise.
3415         * testsuite/30_threads/future/members/share.cc: Likewise.
3416         * testsuite/30_threads/future/members/valid.cc: Likewise.
3417         * testsuite/30_threads/future/members/wait.cc: Likewise.
3418         * testsuite/30_threads/future/members/wait_for.cc: Likewise.
3419         * testsuite/30_threads/future/members/wait_until.cc: Likewise.
3420         * testsuite/30_threads/lock/1.cc: Likewise.
3421         * testsuite/30_threads/lock/2.cc: Likewise.
3422         * testsuite/30_threads/lock/3.cc: Likewise.
3423         * testsuite/30_threads/lock/4.cc: Likewise.
3424         * testsuite/30_threads/mutex/cons/1.cc: Likewise.
3425         * testsuite/30_threads/mutex/dest/destructor_locked.cc: Likewise.
3426         * testsuite/30_threads/mutex/lock/1.cc: Likewise.
3427         * testsuite/30_threads/mutex/native_handle/1.cc: Likewise.
3428         * testsuite/30_threads/mutex/native_handle/typesizes.cc: Likewise.
3429         * testsuite/30_threads/mutex/try_lock/1.cc: Likewise.
3430         * testsuite/30_threads/mutex/try_lock/2.cc: Likewise.
3431         * testsuite/30_threads/mutex/unlock/1.cc: Likewise.
3432         * testsuite/30_threads/mutex/unlock/2.cc: Likewise.
3433         * testsuite/30_threads/packaged_task/49668.cc: Likewise.
3434         * testsuite/30_threads/packaged_task/60564.cc: Likewise.
3435         * testsuite/30_threads/packaged_task/cons/1.cc: Likewise.
3436         * testsuite/30_threads/packaged_task/cons/2.cc: Likewise.
3437         * testsuite/30_threads/packaged_task/cons/3.cc: Likewise.
3438         * testsuite/30_threads/packaged_task/cons/56492.cc: Likewise.
3439         * testsuite/30_threads/packaged_task/cons/alloc.cc: Likewise.
3440         * testsuite/30_threads/packaged_task/cons/move.cc: Likewise.
3441         * testsuite/30_threads/packaged_task/cons/move_assign.cc: Likewise.
3442         * testsuite/30_threads/packaged_task/members/at_thread_exit.cc:
3443         Likewise.
3444         * testsuite/30_threads/packaged_task/members/get_future.cc: Likewise.
3445         * testsuite/30_threads/packaged_task/members/get_future2.cc: Likewise.
3446         * testsuite/30_threads/packaged_task/members/invoke.cc: Likewise.
3447         * testsuite/30_threads/packaged_task/members/invoke2.cc: Likewise.
3448         * testsuite/30_threads/packaged_task/members/invoke3.cc: Likewise.
3449         * testsuite/30_threads/packaged_task/members/invoke4.cc: Likewise.
3450         * testsuite/30_threads/packaged_task/members/invoke5.cc: Likewise.
3451         * testsuite/30_threads/packaged_task/members/reset.cc: Likewise.
3452         * testsuite/30_threads/packaged_task/members/reset2.cc: Likewise.
3453         * testsuite/30_threads/packaged_task/members/swap.cc: Likewise.
3454         * testsuite/30_threads/packaged_task/members/valid.cc: Likewise.
3455         * testsuite/30_threads/promise/60966.cc: Likewise.
3456         * testsuite/30_threads/promise/cons/1.cc: Likewise.
3457         * testsuite/30_threads/promise/cons/alloc.cc: Likewise.
3458         * testsuite/30_threads/promise/cons/move.cc: Likewise.
3459         * testsuite/30_threads/promise/cons/move_assign.cc: Likewise.
3460         * testsuite/30_threads/promise/members/at_thread_exit.cc: Likewise.
3461         * testsuite/30_threads/promise/members/at_thread_exit2.cc: Likewise.
3462         * testsuite/30_threads/promise/members/get_future.cc: Likewise.
3463         * testsuite/30_threads/promise/members/get_future2.cc: Likewise.
3464         * testsuite/30_threads/promise/members/set_exception.cc: Likewise.
3465         * testsuite/30_threads/promise/members/set_exception2.cc: Likewise.
3466         * testsuite/30_threads/promise/members/set_value.cc: Likewise.
3467         * testsuite/30_threads/promise/members/set_value2.cc: Likewise.
3468         * testsuite/30_threads/promise/members/set_value3.cc: Likewise.
3469         * testsuite/30_threads/promise/members/swap.cc: Likewise.
3470         * testsuite/30_threads/recursive_mutex/cons/1.cc: Likewise.
3471         * testsuite/30_threads/recursive_mutex/dest/destructor_locked.cc:
3472         Likewise.
3473         * testsuite/30_threads/recursive_mutex/lock/1.cc: Likewise.
3474         * testsuite/30_threads/recursive_mutex/native_handle/1.cc: Likewise.
3475         * testsuite/30_threads/recursive_mutex/native_handle/typesizes.cc:
3476         Likewise.
3477         * testsuite/30_threads/recursive_mutex/try_lock/1.cc: Likewise.
3478         * testsuite/30_threads/recursive_mutex/try_lock/2.cc: Likewise.
3479         * testsuite/30_threads/recursive_mutex/unlock/1.cc: Likewise.
3480         * testsuite/30_threads/recursive_mutex/unlock/2.cc: Likewise.
3481         * testsuite/30_threads/recursive_timed_mutex/cons/1.cc: Likewise.
3482         * testsuite/30_threads/recursive_timed_mutex/dest/destructor_locked.cc:
3483         Likewise.
3484         * testsuite/30_threads/recursive_timed_mutex/lock/1.cc: Likewise.
3485         * testsuite/30_threads/recursive_timed_mutex/lock/2.cc: Likewise.
3486         * testsuite/30_threads/recursive_timed_mutex/native_handle/1.cc:
3487         Likewise.
3488         * testsuite/30_threads/recursive_timed_mutex/native_handle/typesizes.cc:
3489         Likewise.
3490         * testsuite/30_threads/recursive_timed_mutex/try_lock/1.cc: Likewise.
3491         * testsuite/30_threads/recursive_timed_mutex/try_lock/2.cc: Likewise.
3492         * testsuite/30_threads/recursive_timed_mutex/try_lock_for/1.cc:
3493         Likewise.
3494         * testsuite/30_threads/recursive_timed_mutex/try_lock_for/2.cc:
3495         Likewise.
3496         * testsuite/30_threads/recursive_timed_mutex/try_lock_for/3.cc:
3497         Likewise.
3498         * testsuite/30_threads/recursive_timed_mutex/try_lock_until/1.cc:
3499         Likewise.
3500         * testsuite/30_threads/recursive_timed_mutex/try_lock_until/2.cc:
3501         Likewise.
3502         * testsuite/30_threads/recursive_timed_mutex/unlock/1.cc: Likewise.
3503         * testsuite/30_threads/recursive_timed_mutex/unlock/2.cc: Likewise.
3504         * testsuite/30_threads/shared_future/cons/move.cc: Likewise.
3505         * testsuite/30_threads/shared_future/members/45133.cc: Likewise.
3506         * testsuite/30_threads/shared_future/members/get.cc: Likewise.
3507         * testsuite/30_threads/shared_future/members/get2.cc: Likewise.
3508         * testsuite/30_threads/shared_future/members/valid.cc: Likewise.
3509         * testsuite/30_threads/shared_future/members/wait.cc: Likewise.
3510         * testsuite/30_threads/shared_future/members/wait_for.cc: Likewise.
3511         * testsuite/30_threads/shared_future/members/wait_until.cc: Likewise.
3512         * testsuite/30_threads/shared_lock/cons/1.cc: Likewise.
3513         * testsuite/30_threads/shared_lock/cons/2.cc: Likewise.
3514         * testsuite/30_threads/shared_lock/cons/3.cc: Likewise.
3515         * testsuite/30_threads/shared_lock/cons/4.cc: Likewise.
3516         * testsuite/30_threads/shared_lock/cons/5.cc: Likewise.
3517         * testsuite/30_threads/shared_lock/cons/6.cc: Likewise.
3518         * testsuite/30_threads/shared_lock/locking/1.cc: Likewise.
3519         * testsuite/30_threads/shared_lock/locking/2.cc: Likewise.
3520         * testsuite/30_threads/shared_lock/locking/3.cc: Likewise.
3521         * testsuite/30_threads/shared_lock/locking/4.cc: Likewise.
3522         * testsuite/30_threads/shared_lock/modifiers/1.cc: Likewise.
3523         * testsuite/30_threads/shared_mutex/cons/1.cc: Likewise.
3524         * testsuite/30_threads/shared_mutex/try_lock/1.cc: Likewise.
3525         * testsuite/30_threads/shared_mutex/try_lock/2.cc: Likewise.
3526         * testsuite/30_threads/shared_mutex/unlock/1.cc: Likewise.
3527         * testsuite/30_threads/shared_timed_mutex/cons/1.cc: Likewise.
3528         * testsuite/30_threads/shared_timed_mutex/try_lock/1.cc: Likewise.
3529         * testsuite/30_threads/shared_timed_mutex/try_lock/2.cc: Likewise.
3530         * testsuite/30_threads/shared_timed_mutex/try_lock/3.cc: Likewise.
3531         * testsuite/30_threads/shared_timed_mutex/unlock/1.cc: Likewise.
3532         * testsuite/30_threads/this_thread/1.cc: Likewise.
3533         * testsuite/30_threads/this_thread/sleep_for-mt.cc: Likewise.
3534         * testsuite/30_threads/this_thread/sleep_until-mt.cc: Likewise.
3535         * testsuite/30_threads/thread/cons/1.cc: Likewise.
3536         * testsuite/30_threads/thread/cons/2.cc: Likewise.
3537         * testsuite/30_threads/thread/cons/3.cc: Likewise.
3538         * testsuite/30_threads/thread/cons/4.cc: Likewise.
3539         * testsuite/30_threads/thread/cons/49668.cc: Likewise.
3540         * testsuite/30_threads/thread/cons/5.cc: Likewise.
3541         * testsuite/30_threads/thread/cons/6.cc: Likewise.
3542         * testsuite/30_threads/thread/cons/7.cc: Likewise.
3543         * testsuite/30_threads/thread/cons/8.cc: Likewise.
3544         * testsuite/30_threads/thread/cons/9.cc: Likewise.
3545         * testsuite/30_threads/thread/cons/moveable.cc: Likewise.
3546         * testsuite/30_threads/thread/cons/terminate.cc: Likewise.
3547         * testsuite/30_threads/thread/members/1.cc: Likewise.
3548         * testsuite/30_threads/thread/members/2.cc: Likewise.
3549         * testsuite/30_threads/thread/members/3.cc: Likewise.
3550         * testsuite/30_threads/thread/members/4.cc: Likewise.
3551         * testsuite/30_threads/thread/members/5.cc: Likewise.
3552         * testsuite/30_threads/thread/members/hardware_concurrency.cc:
3553         Likewise.
3554         * testsuite/30_threads/thread/native_handle/typesizes.cc: Likewise.
3555         * testsuite/30_threads/thread/swap/1.cc: Likewise.
3556         * testsuite/30_threads/timed_mutex/cons/1.cc: Likewise.
3557         * testsuite/30_threads/timed_mutex/dest/destructor_locked.cc:
3558         Likewise.
3559         * testsuite/30_threads/timed_mutex/lock/1.cc: Likewise.
3560         * testsuite/30_threads/timed_mutex/native_handle/1.cc: Likewise.
3561         * testsuite/30_threads/timed_mutex/native_handle/typesizes.cc:
3562         Likewise.
3563         * testsuite/30_threads/timed_mutex/try_lock/1.cc: Likewise.
3564         * testsuite/30_threads/timed_mutex/try_lock/2.cc: Likewise.
3565         * testsuite/30_threads/timed_mutex/try_lock_for/1.cc: Likewise.
3566         * testsuite/30_threads/timed_mutex/try_lock_for/2.cc: Likewise.
3567         * testsuite/30_threads/timed_mutex/try_lock_for/3.cc: Likewise.
3568         * testsuite/30_threads/timed_mutex/try_lock_until/1.cc: Likewise.
3569         * testsuite/30_threads/timed_mutex/try_lock_until/2.cc: Likewise.
3570         * testsuite/30_threads/timed_mutex/try_lock_until/57641.cc: Likewise.
3571         * testsuite/30_threads/timed_mutex/unlock/1.cc: Likewise.
3572         * testsuite/30_threads/timed_mutex/unlock/2.cc: Likewise.
3573         * testsuite/30_threads/try_lock/1.cc: Likewise.
3574         * testsuite/30_threads/try_lock/2.cc: Likewise.
3575         * testsuite/30_threads/try_lock/3.cc: Likewise.
3576         * testsuite/30_threads/try_lock/4.cc: Likewise.
3577         * testsuite/30_threads/unique_lock/cons/1.cc: Likewise.
3578         * testsuite/30_threads/unique_lock/cons/2.cc: Likewise.
3579         * testsuite/30_threads/unique_lock/cons/3.cc: Likewise.
3580         * testsuite/30_threads/unique_lock/cons/4.cc: Likewise.
3581         * testsuite/30_threads/unique_lock/cons/5.cc: Likewise.
3582         * testsuite/30_threads/unique_lock/cons/6.cc: Likewise.
3583         * testsuite/30_threads/unique_lock/locking/1.cc: Likewise.
3584         * testsuite/30_threads/unique_lock/locking/2.cc: Likewise.
3585         * testsuite/30_threads/unique_lock/locking/3.cc: Likewise.
3586         * testsuite/30_threads/unique_lock/locking/4.cc: Likewise.
3587         * testsuite/30_threads/unique_lock/modifiers/1.cc: Likewise.
3588
3589 2020-08-21  Jonathan Wakely  <jwakely@redhat.com>
3590
3591         PR libstdc++/96736
3592         * testsuite/17_intro/headers/c++1998/all_attributes.cc: Do not
3593         test "cold" on darwin.
3594         * testsuite/17_intro/headers/c++2011/all_attributes.cc:
3595         Likewise.
3596         * testsuite/17_intro/headers/c++2014/all_attributes.cc:
3597         Likewise.
3598         * testsuite/17_intro/headers/c++2017/all_attributes.cc:
3599         Likewise.
3600         * testsuite/17_intro/headers/c++2020/all_attributes.cc:
3601         Likewise.
3602
3603 2020-08-21  Jonathan Wakely  <jwakely@redhat.com>
3604
3605         PR libstdc++/96718
3606         * testsuite/25_algorithms/pstl/feature_test-2.cc: Require
3607         tbb-backend effective target.
3608         * testsuite/25_algorithms/pstl/feature_test-3.cc: Likewise.
3609         * testsuite/25_algorithms/pstl/feature_test-5.cc: Likewise.
3610         * testsuite/25_algorithms/pstl/feature_test.cc: Likewise.
3611
3612 2020-08-20  Jonathan Wakely  <jwakely@redhat.com>
3613
3614         * include/bits/iterator_concepts.h [__STRICT_ANSI__]
3615         (incrementable_traits<__int128>): Define specialization.
3616         (incrementable_traits<unsigned __int128>): Likewise.
3617         * testsuite/std/ranges/iota/96042.cc: Test iota_view with
3618         __int128.
3619
3620 2020-08-19  Jonathan Wakely  <jwakely@redhat.com>
3621             Patrick Palka  <ppalka@redhat.com>
3622
3623         PR libstdc++/96042
3624         * include/bits/range_access.h (__detail::__to_unsigned_like):
3625         Do not use make_unsigned_t<T> in the return type, as it can
3626         result in an error before the integral<T> constraint is checked.
3627         [__STRICT_ANSI__]: Add overloads for 128-bit integer types.
3628         (__detail::__make_unsigned_like_t): Define as the return type
3629         of __to_unsigned_like.
3630         * testsuite/std/ranges/subrange/96042.cc: New test.
3631
3632 2020-08-19  Jonathan Wakely  <jwakely@redhat.com>
3633
3634         * include/bits/stl_tree.h (operator!=, operator>, operator<=)
3635         (operator>=): Remove deprecated functions.
3636
3637 2020-08-19  Jonathan Wakely  <jwakely@redhat.com>
3638
3639         PR libstdc++/96042
3640         * include/ext/numeric_traits.h (__is_integer_nonstrict): New
3641         trait which is true for 128-bit integers even in strict modes.
3642         (__numeric_traits_integer, __numeric_traits): Use
3643         __is_integer_nonstrict instead of __is_integer.
3644         * include/std/limits [__STRICT_ANSI__ && __SIZEOF_INT128__]
3645         (numeric_limits<__int128>, (numeric_limits<unsigned __int128>):
3646         Define.
3647         * testsuite/std/ranges/iota/96042.cc: New test.
3648
3649 2020-08-19  Jonathan Wakely  <jwakely@redhat.com>
3650
3651         * include/bits/c++config (_GLIBCXX_DEPRECATED_SUGGEST)
3652         (_GLIBCXX11_DEPRECATED, _GLIBCXX11_DEPRECATED_SUGGEST)
3653         (_GLIBCXX17_DEPRECATED_SUGGEST, _GLIBCXX20_DEPRECATED_SUGGEST):
3654         Add new macros to comment.
3655
3656 2020-08-19  Patrick Palka  <ppalka@redhat.com>
3657
3658         * include/Makefile.am (bits_headers): Add new header
3659         <bits/max_size_type.h>.
3660         * include/Makefile.in: Regenerate.
3661         * include/bits/iterator_concepts.h
3662         (ranges::__detail::__max_diff_type): Remove definition, replace
3663         with forward declaration of class __max_diff_type.
3664         (__detail::__max_size_type): Remove definition, replace with
3665         forward declaration of class __max_size_type.
3666         (__detail::__is_unsigned_int128, __is_signed_int128)
3667         (__is_int128): New concepts.
3668         (__detail::__is_integer_like): Accept __int128 and unsigned
3669         __int128.
3670         (__detail::__is_signed_integer_like): Accept __int128.
3671         * include/bits/max_size_type.h: New header.
3672         * include/bits/range_access.h: Include <bits/max_size_type.h>.
3673         (__detail::__to_unsigned_like): Two new overloads.
3674         * testsuite/std/ranges/iota/difference_type.cc: New test.
3675         * testsuite/std/ranges/iota/max_size_type.cc: New test.
3676
3677 2020-08-19  Jonathan Wakely  <jwakely@redhat.com>
3678
3679         * include/bits/c++config (_GLIBCXX_DEPRECATED): Define for all
3680         standard modes.
3681         (_GLIBCXX_DEPRECATED_SUGGEST): New macro for "use 'foo' instead"
3682         message in deprecated warnings.
3683         (_GLIBCXX11_DEPRECATED, _GLIBCXX11_DEPRECATED_SUGGEST): New
3684         macros for marking features deprecated in C++11.
3685         (_GLIBCXX17_DEPRECATED_SUGGEST, _GLIBCXX20_DEPRECATED_SUGGEST):
3686         New macros.
3687         * include/backward/auto_ptr.h (auto_ptr_ref, auto_ptr<void>):
3688         Use _GLIBCXX11_DEPRECATED instead of _GLIBCXX_DEPRECATED.
3689         (auto_ptr): Use _GLIBCXX11_DEPRECATED_SUGGEST.
3690         * include/backward/binders.h (binder1st, binder2nd): Likewise.
3691         * include/bits/ios_base.h (io_state, open_mode, seek_dir)
3692         (streampos, streamoff): Use _GLIBCXX_DEPRECATED_SUGGEST.
3693         * include/std/streambuf (stossc): Replace C++11 attribute
3694         with _GLIBCXX_DEPRECATED_SUGGEST.
3695         * include/std/type_traits (__is_nullptr_t): Use
3696         _GLIBCXX_DEPRECATED_SUGGEST instead of _GLIBCXX_DEPRECATED.
3697         * testsuite/27_io/types/1.cc: Check for deprecated warnings.
3698         Also check for io_state, open_mode and seek_dir typedefs.
3699
3700 2020-08-19  Antony Polukhin  <antoshkka@gmail.com>
3701
3702         PR libstdc++/71579
3703         * include/std/type_traits (invoke_result, is_nothrow_invocable_r)
3704         Add static_asserts to make sure that the argument of the type
3705         trait is not misused with incomplete types.
3706         (is_swappable_with, is_nothrow_swappable_with): Add static_asserts
3707         to make sure that the first and second arguments of the type trait
3708         are not misused with incomplete types.
3709         * testsuite/20_util/invoke_result/incomplete_neg.cc: New test.
3710         * testsuite/20_util/is_nothrow_invocable/incomplete_neg.cc: New test.
3711         * testsuite/20_util/is_nothrow_swappable/incomplete_neg.cc: New test.
3712         * testsuite/20_util/is_nothrow_swappable_with/incomplete_neg.cc: New
3713         test.
3714         * testsuite/20_util/is_swappable_with/incomplete_neg.cc: New test.
3715
3716 2020-08-18  David Edelsohn  <dje.gcc@gmail.com>
3717             Clement Chigot  <clement.chigot@atos.net>
3718
3719         * config/os/aix/t-aix: Add complementary mode object files to
3720         libsupc++.a
3721
3722 2020-08-18  Jonathan Wakely  <jwakely@redhat.com>
3723
3724         * testsuite/17_intro/headers/c++1998/all_attributes.cc: Check
3725         "cold" isn't used in the library. Also check <cxxabi.h>.
3726         * testsuite/17_intro/headers/c++2011/all_attributes.cc:
3727         Likewise.
3728         * testsuite/17_intro/headers/c++2014/all_attributes.cc:
3729         Likewise.
3730         * testsuite/17_intro/headers/c++2017/all_attributes.cc:
3731         Likewise.
3732         * testsuite/17_intro/headers/c++2020/all_attributes.cc:
3733         Likewise.
3734
3735 2020-08-18  Jonathan Wakely  <jwakely@redhat.com>
3736
3737         PR libstdc++/69724
3738         * include/std/future (__future_base::_S_make_deferred_state)
3739         (__future_base::_S_make_async_state): Remove.
3740         (__future_base::_Deferred_state): Change constructor to accept a
3741         parameter pack of arguments and forward them to the call
3742         wrapper.
3743         (__future_base::_Async_state_impl): Likewise. Replace lambda
3744         expression with a named member function.
3745         (async): Construct state object directly from the arguments,
3746         instead of using thread::__make_invoker, _S_make_deferred_state
3747         and _S_make_async_state. Move shared state into the returned
3748         future.
3749         * include/std/thread (thread::_Call_wrapper): New alias
3750         template for use by constructor and std::async.
3751         (thread::thread(Callable&&, Args&&...)): Create state object
3752         directly instead of using _S_make_state.
3753         (thread::__make_invoker, thread::__decayed_tuple)
3754         (thread::_S_make_state): Remove.
3755         * testsuite/30_threads/async/69724.cc: New test.
3756
3757 2020-08-17  Jonathan Wakely  <jwakely@redhat.com>
3758
3759         PR libstdc++/55713
3760         PR libstdc++/71096
3761         PR libstdc++/93147
3762         * include/std/tuple [__has_cpp_attribute(no_unique_address)]
3763         (_Head_base<Idx, Head, true>): New definition of the partial
3764         specialization, using [[no_unique_address]] instead of
3765         inheritance.
3766         * testsuite/libstdc++-prettyprinters/48362.cc: Adjust expected
3767         output.
3768         * testsuite/20_util/tuple/comparison_operators/93147.cc: New test.
3769         * testsuite/20_util/tuple/creation_functions/55713.cc: New test.
3770         * testsuite/20_util/tuple/element_access/71096.cc: New test.
3771
3772 2020-08-14  Lewis Hyatt  <lhyatt@gmail.com>
3773
3774         * testsuite/lib/libstdc++.exp: Use the new option
3775         -fdiagnostics-plain-output.
3776
3777 2020-08-13  Jonathan Wakely  <jwakely@redhat.com>
3778
3779         * acinclude.m4 (GLIBCXX_ENABLE_CHEADERS): Warn if the c_std
3780         option is used and fail unless --enable-cheaders-obsolete is
3781         also used.
3782         * configure: Regenerate.
3783
3784 2020-08-12  Jonathan Wakely  <jwakely@redhat.com>
3785
3786         PR libstdc++/85828
3787         * include/bits/basic_string.h (operator=(basic_string&&)): Check
3788         for self-move before copying with char_traits::copy.
3789         * include/bits/hashtable.h (operator=(_Hashtable&&)): Check for
3790         self-move.
3791         * include/bits/stl_deque.h (_M_move_assign1(deque&&, false_type)):
3792         Check for equal allocators.
3793         * include/bits/stl_list.h (_M_move_assign(list&&, true_type)):
3794         Call clear() instead of _M_clear().
3795         * include/debug/formatter.h (__msg_self_move_assign): Change
3796         comment.
3797         * include/debug/macros.h (__glibcxx_check_self_move_assign):
3798         (_GLIBCXX_DEBUG_VERIFY): Remove.
3799         * include/debug/safe_container.h (operator=(_Safe_container&&)):
3800         Remove assertion check for safe move and make it well-defined.
3801         * include/debug/safe_iterator.h (operator=(_Safe_iterator&&)):
3802         Remove assertion check for self-move.
3803         * include/debug/safe_local_iterator.h
3804         (operator=(_Safe_local_iterator&&)): Likewise.
3805         * testsuite/21_strings/basic_string/cons/char/self_move.cc: New test.
3806         * testsuite/23_containers/deque/cons/self_move.cc: New test.
3807         * testsuite/23_containers/forward_list/cons/self_move.cc: New test.
3808         * testsuite/23_containers/list/cons/self_move.cc: New test.
3809         * testsuite/23_containers/set/cons/self_move.cc: New test.
3810         * testsuite/23_containers/unordered_set/cons/self_move.cc: New test.
3811         * testsuite/23_containers/vector/cons/self_move.cc: New test.
3812
3813 2020-08-11  François Dumont  <fdumont@gcc.gnu.org>
3814
3815         PR libstdc++/91620
3816         * include/bits/forward_list.tcc (forward_list<>::remove): Collect nodes
3817         to destroy in an intermediate forward_list.
3818         (forward_list<>::remove_if, forward_list<>::unique): Likewise.
3819         * include/bits/list.tcc (list<>::remove, list<>::unique): Likewise.
3820         (list<>::remove_if): Likewise.
3821         * include/debug/forward_list (forward_list<>::_M_erase_after): Remove.
3822         (forward_list<>::erase_after): Adapt.
3823         (forward_list<>::remove, forward_list<>::remove_if): Collect nodes to
3824         destroy in an intermediate forward_list.
3825         (forward_list<>::unique): Likewise.
3826         * include/debug/list (list<>::remove, list<>::unique): Likewise.
3827         (list<>::remove_if): Likewise.
3828         * testsuite/23_containers/forward_list/operations/91620.cc: New test.
3829         * testsuite/23_containers/list/operations/91620.cc: New test.
3830
3831 2020-08-11  Jonathan Wakely  <jwakely@redhat.com>
3832
3833         * testsuite/30_threads/thread/cons/84535.cc: Use a custom
3834         namespace.
3835         * testsuite/30_threads/thread/cons/lwg2097.cc: Likewise.
3836
3837 2020-08-11  Jonathan Wakely  <jwakely@redhat.com>
3838
3839         PR libstdc++/89760
3840         * include/experimental/executor [!_GLIBCXX_HAS_GTHREADS]:
3841         (execution_context::mutex_type): Define dummy mutex type.
3842         (system_context): Use execution_context::mutex_type.
3843         (system_context) [!_GLIBCXX_HAS_GTHREADS]: Define dummy
3844         thread and condition variable types.
3845         [!_GLIBCXX_HAS_GTHREADS] (system_context::_M_run()): Do not
3846         define.
3847         (system_context::_M_post) [!_GLIBCXX_HAS_GTHREADS]: Throw
3848         an exception when threads aren't available.
3849         (strand::running_in_this_thread()): Defer to _M_state.
3850         (strand::_State::running_in_this_thread()): New function.
3851         (use_future_t): Do not depend on _GLIBCXX_USE_C99_STDINT_TR1.
3852         * include/experimental/io_context (io_context): Use the
3853         execution_context::mutex_type alias. Replace stack of thread
3854         IDs with counter.
3855         * testsuite/experimental/net/execution_context/use_service.cc:
3856         Enable test for non-pthread targets.
3857
3858 2020-08-11  Jonathan Wakely  <jwakely@redhat.com>
3859
3860         * include/experimental/executor (system_context::a__tag): Make
3861         default constructor explicit.
3862
3863 2020-08-11  Jonathan Wakely  <jwakely@redhat.com>
3864
3865         * include/experimental/executor (system_context::_M_run()):
3866         Fix predicate.
3867         * testsuite/experimental/net/system_context/1.cc: New test.
3868
3869 2020-08-11  Jonathan Wakely  <jwakely@redhat.com>
3870
3871         * include/std/stop_token: Check _GLIBCXX_HAS_GTHREADS using
3872         #ifdef instead of #if.
3873         (stop_token::_S_yield()): Check _GLIBCXX_HAS_GTHREADS before
3874         using __gthread_yield.
3875
3876 2020-08-11  Jonathan Wakely  <jwakely@redhat.com>
3877
3878         * include/std/thread [!_GLIBCXX_HAS_GTHREADS] (this_thread::yield)
3879         (this_thread::sleep_until): Define.
3880         [!_GLIBCXX_HAS_GTHREADS] (this_thread::sleep_for): Define. Replace
3881         use of __gthread_time_t typedef with timespec.
3882         * src/c++11/thread.cc [!_GLIBCXX_HAS_GTHREADS] (__sleep_for):
3883         Likewise.
3884         * testsuite/30_threads/this_thread/2.cc: Moved to...
3885         * testsuite/30_threads/this_thread/yield.cc: ...here.
3886         * testsuite/30_threads/this_thread/3.cc: Moved to...
3887         * testsuite/30_threads/this_thread/sleep_for-mt.cc: ...here.
3888         * testsuite/30_threads/this_thread/4.cc: Moved to...
3889         * testsuite/30_threads/this_thread/sleep_until-mt.cc: ...here.
3890         * testsuite/30_threads/this_thread/58038.cc: Add
3891         dg-require-sleep.
3892         * testsuite/30_threads/this_thread/60421.cc: Likewise.
3893         * testsuite/30_threads/this_thread/sleep_for.cc: New test.
3894         * testsuite/30_threads/this_thread/sleep_until.cc: New test.
3895
3896 2020-08-10  Jonathan Wakely  <jwakely@redhat.com>
3897
3898         PR libstdc++/94681
3899         * src/c++17/fs_ops.cc (read_symlink): Use posix::lstat instead
3900         of calling ::lstat directly.
3901         * src/filesystem/ops.cc (read_symlink): Likewise.
3902
3903 2020-08-10  Jonathan Wakely  <jwakely@redhat.com>
3904
3905         * python/libstdcxx/v6/printers.py (UniquePointerPrinter.__init__):
3906         Use gdb.Type.strip_typedefs().
3907         * testsuite/libstdc++-prettyprinters/compat.cc: Use a typedef in
3908         the emulated old type.
3909
3910 2020-08-10  Jonathan Wakely  <jwakely@redhat.com>
3911
3912         PR libstdc++/94681
3913         * acinclude.m4 (GLIBCXX_CHECK_FILESYSTEM_DEPS): Do not depend on
3914         $enable_libstdcxx_filesystem_ts.
3915         * configure: Regenerate.
3916
3917 2020-08-10  Jonathan Wakely  <jwakely@redhat.com>
3918
3919         PR libstdc++/93904
3920         * include/bits/stl_iterator.h (inserter): Do not deduce
3921         iterator type (LWG 561).
3922         * testsuite/24_iterators/insert_iterator/dr561.cc: New test.
3923
3924 2020-08-10  Jonathan Wakely  <jwakely@redhat.com>
3925
3926         * include/bits/basic_string.tcc [_GLIBCXX_USE_CXX11_ABI=0]
3927         (basic_string::reserve()): Do nothing if exceptions are not
3928         enabled.
3929
3930 2020-08-10  Jonathan Wakely  <jwakely@redhat.com>
3931
3932         PR libstdc++/95749
3933         * src/filesystem/ops-common.h [_GLIBCXX_FILESYSTEM_IS_WINDOWS]
3934         (stat_type): Change to __stat64.
3935         (stat): Use _wstat64.
3936
3937 2020-08-07  Jonathan Wakely  <jwakely@redhat.com>
3938
3939         PR libstdc++/96303
3940         * include/debug/bitset (bitset::operator==): Call _M_base() on
3941         right operand.
3942         (bitset::operator!=): Likewise, but don't define it at all when
3943         default comparisons are supported by the compiler.
3944         * testsuite/23_containers/bitset/operations/96303.cc: New test.
3945
3946 2020-08-07  Jonathan Wakely  <jwakely@redhat.com>
3947
3948         * testsuite/18_support/comparisons/algorithms/partial_order.cc:
3949         Replace VERIFY with static_assert where the compiler now
3950         allows it.
3951         * testsuite/18_support/comparisons/algorithms/weak_order.cc:
3952         Likewise.
3953
3954 2020-08-07  Jonathan Wakely  <jwakely@redhat.com>
3955
3956         * config/abi/pre/gnu.ver: Fix wildcards for wstring symbols.
3957
3958 2020-08-06  Andrew Luo  <andrewluotechnologies@outlook.com>
3959             Jonathan Wakely  <jwakely@redhat.com>
3960
3961         * config/abi/pre/gnu.ver (GLIBCXX_3.4): Use less greedy
3962         patterns for basic_string members.
3963         (GLIBCXX_3.4.29): Export new basic_string::reserve symbols.
3964         * doc/xml/manual/status_cxx2020.xml: Update P0966 status.
3965         * include/bits/basic_string.h (shrink_to_fit()): Call reserve().
3966         (reserve(size_type)): Remove default argument.
3967         (reserve()): Declare new overload.
3968         [!_GLIBCXX_USE_CXX11_ABI] (shrink_to_fit, reserve): Likewise.
3969         * include/bits/basic_string.tcc (reserve(size_type)): Remove
3970         support for shrinking capacity.
3971         (reserve()): Perform shrink-to-fit operation.
3972         [!_GLIBCXX_USE_CXX11_ABI] (reserve): Likewise.
3973         * testsuite/21_strings/basic_string/capacity/1.cc: Adjust to
3974         reflect new behavior.
3975         * testsuite/21_strings/basic_string/capacity/char/1.cc:
3976         Likewise.
3977         * testsuite/21_strings/basic_string/capacity/char/18654.cc:
3978         Likewise.
3979         * testsuite/21_strings/basic_string/capacity/char/2.cc:
3980         Likewise.
3981         * testsuite/21_strings/basic_string/capacity/wchar_t/1.cc:
3982         Likewise.
3983         * testsuite/21_strings/basic_string/capacity/wchar_t/18654.cc:
3984         Likewise.
3985         * testsuite/21_strings/basic_string/capacity/wchar_t/2.cc:
3986         Likewise.
3987
3988 2020-08-06  Jonathan Wakely  <jwakely@redhat.com>
3989
3990         * include/bits/basic_string.tcc
3991         (operator>>(basic_istream&, basic_string&)): Do not set eofbit
3992         if extraction stopped after in.width() characters.
3993         * src/c++98/istream-string.cc (operator>>(istream&, string&)):
3994         Likewise.
3995         * include/bits/istream.tcc (__istream_extract): Do not set
3996         eofbit if extraction stopped after n-1 characters.
3997         * src/c++98/istream.cc (__istream_extract): Likewise.
3998         * testsuite/21_strings/basic_string/inserters_extractors/char/13.cc: New test.
3999         * testsuite/21_strings/basic_string/inserters_extractors/wchar_t/13.cc: New test.
4000         * testsuite/27_io/basic_istream/extractors_character/char/5.cc: New test.
4001         * testsuite/27_io/basic_istream/extractors_character/wchar_t/5.cc: New test.
4002
4003 2020-08-06  Jonathan Wakely  <jwakely@redhat.com>
4004
4005         PR libstdc++/96484
4006         * src/c++17/fs_ops.cc (fs::read_symlink): Return an error
4007         immediately for non-symlinks.
4008         * src/filesystem/ops.cc (fs::read_symlink): Likewise.
4009
4010 2020-08-06  Jonathan Wakely  <jwakely@redhat.com>
4011
4012         * include/std/istream (operator>>(istream&, char*)): Add
4013         attributes to get warnings for pointers that are null or known
4014         to point to the end of a buffer. Request upper bound from
4015         __builtin_object_size check and handle zero-sized buffer case.
4016         (operator>>(istream&, signed char))
4017         (operator>>(istream&, unsigned char*)): Add attributes.
4018         * testsuite/27_io/basic_istream/extractors_character/char/overflow.cc:
4019         Check extracting into the middle of a buffer.
4020         * testsuite/27_io/basic_istream/extractors_character/wchar_t/overflow.cc: New test.
4021
4022 2020-08-05  Jonathan Wakely  <jwakely@redhat.com>
4023
4024         * include/std/atomic (atomic<T>::store): Reformat.
4025
4026 2020-08-05  Jonathan Wakely  <jwakely@redhat.com>
4027
4028         * doc/xml/manual/status_cxx2017.xml: Replace oneAPI DPC++ link
4029         with LLVM repo for PSTL.
4030         * doc/html/manual/status.html: Regenerate.
4031
4032 2020-08-05  Jonathan Wakely  <jwakely@redhat.com>
4033
4034         * config/abi/pre/gnu.ver (GLIBCXX_3.4.29): Export new symbols.
4035         * include/bits/istream.tcc (__istream_extract): New function
4036         template implementing both of operator>>(istream&, char*) and
4037         operator>>(istream&, char(&)[N]). Add explicit instantiation
4038         declaration for it. Remove explicit instantiation declarations
4039         for old function templates.
4040         * include/std/istream (__istream_extract): Declare.
4041         (operator>>(basic_istream<C,T>&, C*)): Define inline and simply
4042         call __istream_extract.
4043         (operator>>(basic_istream<char,T>&, signed char*)): Likewise.
4044         (operator>>(basic_istream<char,T>&, unsigned char*)): Likewise.
4045         (operator>>(basic_istream<C,T>&, C(7)[N])): Define for LWG 2499.
4046         (operator>>(basic_istream<char,T>&, signed char(&)[N])):
4047         Likewise.
4048         (operator>>(basic_istream<char,T>&, unsigned char(&)[N])):
4049         Likewise.
4050         * include/std/streambuf (basic_streambuf): Declare char overload
4051         of __istream_extract as a friend.
4052         * src/c++11/istream-inst.cc: Add explicit instantiation
4053         definition for wchar_t overload of __istream_extract. Remove
4054         explicit instantiation definitions of old operator>> overloads
4055         for versioned-namespace build.
4056         * src/c++98/istream.cc (operator>>(istream&, char*)): Replace
4057         with __istream_extract(istream&, char*, streamsize).
4058         * testsuite/27_io/basic_istream/extractors_character/char/3.cc:
4059         Do not use variable-length array.
4060         * testsuite/27_io/basic_istream/extractors_character/char/4.cc:
4061         Do not run test for C++20.
4062         * testsuite/27_io/basic_istream/extractors_character/char/9555-ic.cc:
4063         Do not test writing to pointers for C++20.
4064         * testsuite/27_io/basic_istream/extractors_character/char/9826.cc:
4065         Use array instead of pointer.
4066         * testsuite/27_io/basic_istream/extractors_character/wchar_t/3.cc:
4067         Do not use variable-length array.
4068         * testsuite/27_io/basic_istream/extractors_character/wchar_t/4.cc:
4069         Do not run test for C++20.
4070         * testsuite/27_io/basic_istream/extractors_character/wchar_t/9555-ic.cc:
4071         Do not test writing to pointers for C++20.
4072         * testsuite/27_io/basic_istream/extractors_character/char/lwg2499.cc:
4073         New test.
4074         * testsuite/27_io/basic_istream/extractors_character/char/lwg2499_neg.cc:
4075         New test.
4076         * testsuite/27_io/basic_istream/extractors_character/char/overflow.cc:
4077         New test.
4078         * testsuite/27_io/basic_istream/extractors_character/wchar_t/lwg2499.cc:
4079         New test.
4080         * testsuite/27_io/basic_istream/extractors_character/wchar_t/lwg2499_neg.cc:
4081         New test.
4082
4083 2020-08-01  Gerald Pfeifer  <gerald@pfeifer.com>
4084
4085         * doc/xml/manual/using_exceptions.xml: Move www.stroustrup.com to
4086         https.
4087         * doc/html/manual/using_exceptions.html: Regenerate.
4088
4089 2020-07-31  Gerald Pfeifer  <gerald@pfeifer.com>
4090
4091         * doc/xml/manual/status_cxx2017.xml: ParallelSTL is now part
4092         of oneAPI DPC++ Library on Github.
4093         * doc/html/manual/status.html: Regenerate.
4094
4095 2020-07-31  François Dumont  <fdumont@gcc.gnu.org>
4096
4097         * include/bits/stl_bvector.h
4098         [_GLIBCXX_INLINE_VERSION](_Bvector_impl_data::_M_start): Define as
4099         _Bit_type*.
4100         (_Bvector_impl_data(const _Bvector_impl_data&)): Default.
4101         (_Bvector_impl_data(_Bvector_impl_data&&)): Delegate to latter.
4102         (_Bvector_impl_data::operator=(const _Bvector_impl_data&)): Default.
4103         (_Bvector_impl_data::_M_move_data(_Bvector_impl_data&&)): Use latter.
4104         (_Bvector_impl_data::_M_reset()): Likewise.
4105         (_Bvector_impl_data::_M_swap_data): New.
4106         (_Bvector_impl::_Bvector_impl(_Bvector_impl&&)): Implement explicitely.
4107         (_Bvector_impl::_Bvector_impl(_Bit_alloc_type&&, _Bvector_impl&&)): New.
4108         (_Bvector_base::_Bvector_base(_Bvector_base&&, const allocator_type&)):
4109         New, use latter.
4110         (vector::vector(vector&&, const allocator_type&, true_type)): New, use
4111         latter.
4112         (vector::vector(vector&&, const allocator_type&, false_type)): New.
4113         (vector::vector(vector&&, const allocator_type&)): Use latters.
4114         (vector::vector(const vector&, const allocator_type&)): Adapt.
4115         [__cplusplus >= 201103](vector::vector(_InputIt, _InputIt,
4116         const allocator_type&)): Use _M_initialize_range.
4117         (vector::operator[](size_type)): Use iterator operator[].
4118         (vector::operator[](size_type) const): Use const_iterator operator[].
4119         (vector::swap(vector&)): Add assertions on allocators. Use _M_swap_data.
4120         [__cplusplus >= 201103](vector::insert(const_iterator, _InputIt,
4121         _InputIt)): Use _M_insert_range.
4122         (vector::_M_initialize(size_type)): Adapt.
4123         [__cplusplus >= 201103](vector::_M_initialize_dispatch): Remove.
4124         [__cplusplus >= 201103](vector::_M_insert_dispatch): Remove.
4125         * python/libstdcxx/v6/printers.py (StdVectorPrinter._iterator): Stop
4126         using start _M_offset.
4127         (StdVectorPrinter.to_string): Likewise.
4128         * testsuite/23_containers/vector/bool/allocator/swap.cc: Adapt.
4129         * testsuite/23_containers/vector/bool/cons/noexcept_move_construct.cc:
4130         Add check.
4131
4132 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
4133
4134         * testsuite/27_io/basic_istream/ignore/char/94749.cc: Use 0
4135         instead of nullptr.
4136         * testsuite/27_io/basic_istream/ignore/wchar_t/94749.cc:
4137         Likewise.
4138
4139 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
4140
4141         * testsuite/20_util/specialized_algorithms/uninitialized_fill_n/sizes.cc:
4142         Move struct to namespace scope.
4143
4144 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
4145
4146         * testsuite/26_numerics/numbers/float128.cc: Check
4147         __STRICT_ANSI__ before using __float128.
4148         * testsuite/std/concepts/concepts.lang/concept.arithmetic/floating_point.cc:
4149         Likewise.
4150
4151 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
4152
4153         * testsuite/18_support/set_terminate.cc: Require C++11 or
4154         higher.
4155         * testsuite/28_regex/simple_c++11.cc: Likewise.
4156         * testsuite/tr1/headers/c++200x/complex.cc: Likewise.
4157         * testsuite/24_iterators/headers/iterator/synopsis.cc:
4158         Require C++14 or lower.
4159
4160 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
4161
4162         * testsuite/23_containers/span/back_assert_neg.cc: Split c++2a
4163         effective-target from xfail selector.
4164         * testsuite/23_containers/span/first_2_assert_neg.cc: Likewise.
4165         * testsuite/23_containers/span/first_assert_neg.cc: Likewise.
4166         * testsuite/23_containers/span/front_assert_neg.cc: Likewise.
4167         * testsuite/23_containers/span/index_op_assert_neg.cc: Likewise.
4168         * testsuite/23_containers/span/last_2_assert_neg.cc: Likewise.
4169         * testsuite/23_containers/span/last_assert_neg.cc: Likewise.
4170         * testsuite/23_containers/span/subspan_2_assert_neg.cc:
4171         Likewise.
4172         * testsuite/23_containers/span/subspan_3_assert_neg.cc:
4173         Likewise.
4174         * testsuite/23_containers/span/subspan_4_assert_neg.cc:
4175         Likewise.
4176         * testsuite/23_containers/span/subspan_5_assert_neg.cc:
4177         Likewise.
4178         * testsuite/23_containers/span/subspan_6_assert_neg.cc:
4179         Likewise.
4180         * testsuite/23_containers/span/subspan_assert_neg.cc: Likewise.
4181
4182 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
4183
4184         * testsuite/20_util/reference_wrapper/83427.cc: Adjust
4185         effective-target to specific language mode only.
4186         * testsuite/24_iterators/headers/iterator/range_access_c++11.cc:
4187         Likewise.
4188         * testsuite/24_iterators/headers/iterator/range_access_c++14.cc:
4189         Likewise.
4190         * testsuite/24_iterators/headers/iterator/synopsis_c++11.cc:
4191         Likewise.
4192         * testsuite/24_iterators/headers/iterator/synopsis_c++14.cc:
4193         Likewise.
4194         * testsuite/26_numerics/valarray/69116.cc:
4195         Likewise.
4196         * testsuite/30_threads/headers/condition_variable/std_c++0x_neg.cc:
4197         Remove whitespace at end of file.
4198         * testsuite/30_threads/headers/future/std_c++0x_neg.cc:
4199         Likewise.
4200
4201 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
4202
4203         * testsuite/17_intro/headers/c++2017/all_attributes.cc: Add
4204         c++17 effective-target.
4205         * testsuite/17_intro/headers/c++2017/all_no_exceptions.cc:
4206         Likewise.
4207         * testsuite/17_intro/headers/c++2017/all_no_rtti.cc: Likewise.
4208         * testsuite/17_intro/headers/c++2017/all_pedantic_errors.cc:
4209         Likewise.
4210         * testsuite/17_intro/headers/c++2017/operator_names.cc:
4211         Likewise.
4212         * testsuite/17_intro/headers/c++2017/stdc++.cc: Likewise.
4213         * testsuite/17_intro/headers/c++2017/stdc++_multiple_inclusion.cc:
4214         Likewise.
4215         * testsuite/18_support/uncaught_exceptions/uncaught_exceptions.cc:
4216         Likewise.
4217         * testsuite/19_diagnostics/error_code/is_error_code_v.cc:
4218         Likewise.
4219         * testsuite/20_util/any/assign/1.cc: Likewise.
4220         * testsuite/20_util/any/assign/2.cc: Likewise.
4221         * testsuite/20_util/any/assign/emplace.cc: Likewise.
4222         * testsuite/20_util/any/assign/exception.cc: Likewise.
4223         * testsuite/20_util/any/assign/self.cc: Likewise.
4224         * testsuite/20_util/any/cons/1.cc: Likewise.
4225         * testsuite/20_util/any/cons/2.cc: Likewise.
4226         * testsuite/20_util/any/cons/aligned.cc: Likewise.
4227         * testsuite/20_util/any/cons/explicit.cc: Likewise.
4228         * testsuite/20_util/any/cons/in_place.cc: Likewise.
4229         * testsuite/20_util/any/cons/nontrivial.cc: Likewise.
4230         * testsuite/20_util/any/make_any.cc: Likewise.
4231         * testsuite/20_util/any/misc/any_cast.cc: Likewise.
4232         * testsuite/20_util/any/misc/any_cast_no_rtti.cc: Likewise.
4233         * testsuite/20_util/any/misc/swap.cc: Likewise.
4234         * testsuite/20_util/any/modifiers/1.cc: Likewise.
4235         * testsuite/20_util/any/observers/type.cc: Likewise.
4236         * testsuite/20_util/any/requirements.cc: Likewise.
4237         * testsuite/20_util/any/typedefs.cc: Likewise.
4238         * testsuite/20_util/as_const/1.cc: Likewise.
4239         * testsuite/20_util/as_const/rvalue_neg.cc: Likewise.
4240         * testsuite/20_util/bind/is_placeholder_v.cc: Likewise.
4241         * testsuite/20_util/bool_constant/requirements.cc: Likewise.
4242         * testsuite/20_util/duration/requirements/treat_as_floating_point_v.cc:
4243         Likewise.
4244         * testsuite/20_util/duration_cast/rounding.cc: Likewise.
4245         * testsuite/20_util/enable_shared_from_this/members/weak_from_this.cc:
4246         Likewise.
4247         * testsuite/20_util/function_objects/invoke/59768.cc: Likewise.
4248         * testsuite/20_util/function_objects/not_fn/1.cc: Likewise.
4249         * testsuite/20_util/function_objects/searchers.cc: Likewise.
4250         * testsuite/20_util/in_place/requirements.cc: Likewise.
4251         * testsuite/20_util/is_invocable/requirements/explicit_instantiation.cc:
4252         Likewise.
4253         * testsuite/20_util/is_invocable/requirements/typedefs.cc:
4254         Likewise.
4255         * testsuite/20_util/is_invocable/value.cc: Likewise.
4256         * testsuite/20_util/is_nothrow_invocable/requirements/explicit_instantiation.cc:
4257         Likewise.
4258         * testsuite/20_util/is_nothrow_invocable/requirements/typedefs.cc:
4259         Likewise.
4260         * testsuite/20_util/is_nothrow_swappable/requirements/explicit_instantiation.cc:
4261         Likewise.
4262         * testsuite/20_util/is_nothrow_swappable/requirements/typedefs.cc:
4263         Likewise.
4264         * testsuite/20_util/is_nothrow_swappable/value.cc: Likewise.
4265         * testsuite/20_util/is_nothrow_swappable_with/requirements/explicit_instantiation.cc:
4266         Likewise.
4267         * testsuite/20_util/is_nothrow_swappable_with/requirements/typedefs.cc:
4268         Likewise.
4269         * testsuite/20_util/is_nothrow_swappable_with/value.cc:
4270         Likewise.
4271         * testsuite/20_util/is_swappable/requirements/explicit_instantiation.cc:
4272         Likewise.
4273         * testsuite/20_util/is_swappable/requirements/typedefs.cc:
4274         Likewise.
4275         * testsuite/20_util/is_swappable/value.cc: Likewise.
4276         * testsuite/20_util/is_swappable_with/requirements/explicit_instantiation.cc:
4277         Likewise.
4278         * testsuite/20_util/is_swappable_with/requirements/typedefs.cc:
4279         Likewise.
4280         * testsuite/20_util/is_swappable_with/value.cc: Likewise.
4281         * testsuite/20_util/logical_traits/requirements/explicit_instantiation.cc:
4282         Likewise.
4283         * testsuite/20_util/logical_traits/requirements/typedefs.cc:
4284         Likewise.
4285         * testsuite/20_util/logical_traits/value.cc: Likewise.
4286         * testsuite/20_util/optional/constexpr/make_optional.cc: Likewise.
4287         * testsuite/20_util/optional/constexpr/observers/2.cc: Likewise.
4288         * testsuite/20_util/optional/constexpr/observers/3.cc: Likewise.
4289         * testsuite/20_util/optional/hash.cc: Likewise.
4290         * testsuite/20_util/pair/swap_cxx17.cc: Likewise.
4291         * testsuite/20_util/ratio/requirements/ratio_equal_v.cc: Likewise.
4292         * testsuite/20_util/shared_ptr/requirements/weak_type.cc:
4293         Likewise.
4294         * testsuite/20_util/specialized_algorithms/memory_management_tools/1.cc:
4295         Likewise.
4296         * testsuite/20_util/tuple/apply/1.cc: Likewise.
4297         * testsuite/20_util/tuple/make_from_tuple/1.cc: Likewise.
4298         * testsuite/20_util/tuple/swap_cxx17.cc: Likewise.
4299         * testsuite/20_util/tuple/tuple_size_v.cc: Likewise.
4300         * testsuite/20_util/unique_ptr/specialized_algorithms/swap_cxx17.cc:
4301         Likewise.
4302         * testsuite/20_util/uses_allocator/requirements/uses_allocator_v.cc:
4303         Likewise.
4304         * testsuite/20_util/variant/any.cc: Likewise.
4305         * testsuite/20_util/variant/compile.cc: Likewise.
4306         * testsuite/20_util/variant/hash.cc: Likewise.
4307         * testsuite/20_util/variant/index_type.cc: Likewise.
4308         * testsuite/20_util/variant/run.cc: Likewise.
4309         * testsuite/20_util/void_t/1.cc: Likewise.
4310         * testsuite/21_strings/basic_string/79162.cc: Likewise.
4311         * testsuite/21_strings/basic_string/cons/char/7.cc: Likewise.
4312         * testsuite/21_strings/basic_string/cons/wchar_t/7.cc: Likewise.
4313         * testsuite/21_strings/basic_string/lwg2758.cc: Likewise.
4314         * testsuite/21_strings/basic_string/lwg2946.cc: Likewise.
4315         * testsuite/21_strings/basic_string/modifiers/append/char/4.cc:
4316         Likewise.
4317         * testsuite/21_strings/basic_string/modifiers/append/wchar_t/4.cc:
4318         Likewise.
4319         * testsuite/21_strings/basic_string/modifiers/assign/char/4.cc:
4320         Likewise.
4321         * testsuite/21_strings/basic_string/modifiers/assign/wchar_t/4.cc:
4322         Likewise.
4323         * testsuite/21_strings/basic_string/modifiers/insert/char/3.cc:
4324         Likewise.
4325         * testsuite/21_strings/basic_string/modifiers/insert/wchar_t/3.cc:
4326         Likewise.
4327         * testsuite/21_strings/basic_string/modifiers/replace/char/7.cc:
4328         Likewise.
4329         * testsuite/21_strings/basic_string/modifiers/replace/wchar_t/7.cc:
4330         Likewise.
4331         * testsuite/21_strings/basic_string/operations/compare/char/2.cc:
4332         Likewise.
4333         * testsuite/21_strings/basic_string/operations/compare/wchar_t/2.cc:
4334         Likewise.
4335         * testsuite/21_strings/basic_string/operations/data/char/2.cc:
4336         Likewise.
4337         * testsuite/21_strings/basic_string/operations/data/wchar_t/2.cc:
4338         Likewise.
4339         * testsuite/21_strings/basic_string/operations/find/char/5.cc:
4340         Likewise.
4341         * testsuite/21_strings/basic_string/operations/find/wchar_t/5.cc:
4342         Likewise.
4343         * testsuite/21_strings/basic_string/operators/char/5.cc: Likewise.
4344         * testsuite/21_strings/basic_string/operators/wchar_t/5.cc:
4345         Likewise.
4346         * testsuite/21_strings/basic_string_view/capacity/1.cc: Likewise.
4347         * testsuite/21_strings/basic_string_view/cons/char/1.cc: Likewise.
4348         * testsuite/21_strings/basic_string_view/cons/char/2.cc: Likewise.
4349         * testsuite/21_strings/basic_string_view/cons/char/3.cc: Likewise.
4350         * testsuite/21_strings/basic_string_view/cons/wchar_t/1.cc:
4351         Likewise.
4352         * testsuite/21_strings/basic_string_view/cons/wchar_t/2.cc:
4353         Likewise.
4354         * testsuite/21_strings/basic_string_view/cons/wchar_t/3.cc:
4355         Likewise.
4356         * testsuite/21_strings/basic_string_view/element_access/char/1.cc:
4357         Likewise.
4358         * testsuite/21_strings/basic_string_view/element_access/char/2.cc:
4359         Likewise.
4360         * testsuite/21_strings/basic_string_view/element_access/char/empty.cc:
4361         Likewise.
4362         * testsuite/21_strings/basic_string_view/element_access/char/front_back.cc:
4363         Likewise.
4364         * testsuite/21_strings/basic_string_view/element_access/wchar_t/1.cc:
4365         Likewise.
4366         * testsuite/21_strings/basic_string_view/element_access/wchar_t/2.cc:
4367         Likewise.
4368         * testsuite/21_strings/basic_string_view/element_access/wchar_t/empty.cc:
4369         Likewise.
4370         * testsuite/21_strings/basic_string_view/element_access/wchar_t/front_back.cc:
4371         Likewise.
4372         * testsuite/21_strings/basic_string_view/include.cc: Likewise.
4373         * testsuite/21_strings/basic_string_view/inserters/char/1.cc:
4374         Likewise.
4375         * testsuite/21_strings/basic_string_view/inserters/char/2.cc:
4376         Likewise.
4377         * testsuite/21_strings/basic_string_view/inserters/char/3.cc:
4378         Likewise.
4379         * testsuite/21_strings/basic_string_view/inserters/pod/10081-out.cc:
4380         Likewise.
4381         * testsuite/21_strings/basic_string_view/inserters/wchar_t/1.cc:
4382         Likewise.
4383         * testsuite/21_strings/basic_string_view/inserters/wchar_t/2.cc:
4384         Likewise.
4385         * testsuite/21_strings/basic_string_view/inserters/wchar_t/3.cc:
4386         Likewise.
4387         * testsuite/21_strings/basic_string_view/literals/types-char8_t.cc:
4388         Likewise.
4389         * testsuite/21_strings/basic_string_view/literals/types.cc:
4390         Likewise.
4391         * testsuite/21_strings/basic_string_view/literals/values-char8_t.cc:
4392         Likewise.
4393         * testsuite/21_strings/basic_string_view/literals/values.cc:
4394         Likewise.
4395         * testsuite/21_strings/basic_string_view/modifiers/remove_prefix/char/1.cc:
4396         Likewise.
4397         * testsuite/21_strings/basic_string_view/modifiers/remove_prefix/wchar_t/1.cc:
4398         Likewise.
4399         * testsuite/21_strings/basic_string_view/modifiers/remove_suffix/char/1.cc:
4400         Likewise.
4401         * testsuite/21_strings/basic_string_view/modifiers/remove_suffix/wchar_t/1.cc:
4402         Likewise.
4403         * testsuite/21_strings/basic_string_view/operations/compare/char/1.cc:
4404         Likewise.
4405         * testsuite/21_strings/basic_string_view/operations/compare/char/13650.cc:
4406         Likewise.
4407         * testsuite/21_strings/basic_string_view/operations/compare/wchar_t/1.cc:
4408         Likewise.
4409         * testsuite/21_strings/basic_string_view/operations/compare/wchar_t/13650.cc:
4410         Likewise.
4411         * testsuite/21_strings/basic_string_view/operations/copy/char/1.cc:
4412         Likewise.
4413         * testsuite/21_strings/basic_string_view/operations/copy/wchar_t/1.cc:
4414         Likewise.
4415         * testsuite/21_strings/basic_string_view/operations/data/char/1.cc:
4416         Likewise.
4417         * testsuite/21_strings/basic_string_view/operations/data/wchar_t/1.cc:
4418         Likewise.
4419         * testsuite/21_strings/basic_string_view/operations/find/char/1.cc:
4420         Likewise.
4421         * testsuite/21_strings/basic_string_view/operations/find/char/2.cc:
4422         Likewise.
4423         * testsuite/21_strings/basic_string_view/operations/find/char/3.cc:
4424         Likewise.
4425         * testsuite/21_strings/basic_string_view/operations/find/char/4.cc:
4426         Likewise.
4427         * testsuite/21_strings/basic_string_view/operations/find/wchar_t/1.cc:
4428         Likewise.
4429         * testsuite/21_strings/basic_string_view/operations/find/wchar_t/2.cc:
4430         Likewise.
4431         * testsuite/21_strings/basic_string_view/operations/find/wchar_t/3.cc:
4432         Likewise.
4433         * testsuite/21_strings/basic_string_view/operations/find/wchar_t/4.cc:
4434         Likewise.
4435         * testsuite/21_strings/basic_string_view/operations/rfind/char/1.cc:
4436         Likewise.
4437         * testsuite/21_strings/basic_string_view/operations/rfind/char/2.cc:
4438         Likewise.
4439         * testsuite/21_strings/basic_string_view/operations/rfind/char/3.cc:
4440         Likewise.
4441         * testsuite/21_strings/basic_string_view/operations/rfind/wchar_t/1.cc:
4442         Likewise.
4443         * testsuite/21_strings/basic_string_view/operations/rfind/wchar_t/2.cc:
4444         Likewise.
4445         * testsuite/21_strings/basic_string_view/operations/rfind/wchar_t/3.cc:
4446         Likewise.
4447         * testsuite/21_strings/basic_string_view/operations/string_conversion/1.cc:
4448         Likewise.
4449         * testsuite/21_strings/basic_string_view/operations/substr/char/1.cc:
4450         Likewise.
4451         * testsuite/21_strings/basic_string_view/operations/substr/wchar_t/1.cc:
4452         Likewise.
4453         * testsuite/21_strings/basic_string_view/range_access/char/1.cc:
4454         Likewise.
4455         * testsuite/21_strings/basic_string_view/range_access/wchar_t/1.cc:
4456         Likewise.
4457         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/1.cc:
4458         Likewise.
4459         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/char/1.cc:
4460         Likewise.
4461         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/char16_t/1.cc:
4462         Likewise.
4463         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/char32_t/1.cc:
4464         Likewise.
4465         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/char8_t/1.cc:
4466         Likewise.
4467         * testsuite/21_strings/basic_string_view/requirements/explicit_instantiation/wchar_t/1.cc:
4468         Likewise.
4469         * testsuite/21_strings/basic_string_view/requirements/typedefs.cc:
4470         Likewise.
4471         * testsuite/21_strings/basic_string_view/typedefs.cc: Likewise.
4472         * testsuite/21_strings/basic_string_view/types/1.cc: Likewise.
4473         * testsuite/23_containers/array/specialized_algorithms/swap_cxx17.cc:
4474         Likewise.
4475         * testsuite/23_containers/map/modifiers/extract.cc: Likewise.
4476         * testsuite/23_containers/map/modifiers/insert_or_assign/1.cc:
4477         Likewise.
4478         * testsuite/23_containers/map/modifiers/merge.cc: Likewise.
4479         * testsuite/23_containers/map/modifiers/try_emplace/1.cc: Likewise.
4480         * testsuite/23_containers/multimap/modifiers/extract.cc: Likewise.
4481         * testsuite/23_containers/multimap/modifiers/merge.cc: Likewise.
4482         * testsuite/23_containers/multiset/modifiers/extract.cc: Likewise.
4483         * testsuite/23_containers/multiset/modifiers/merge.cc: Likewise.
4484         * testsuite/23_containers/set/modifiers/extract.cc: Likewise.
4485         * testsuite/23_containers/set/modifiers/merge.cc: Likewise.
4486         * testsuite/23_containers/unordered_map/modifiers/extract.cc:
4487         Likewise.
4488         * testsuite/23_containers/unordered_map/modifiers/insert_or_assign.cc:
4489         Likewise.
4490         * testsuite/23_containers/unordered_map/modifiers/merge.cc:
4491         Likewise.
4492         * testsuite/23_containers/unordered_map/modifiers/try_emplace.cc:
4493         Likewise.
4494         * testsuite/23_containers/unordered_multimap/modifiers/extract.cc:
4495         Likewise.
4496         * testsuite/23_containers/unordered_multimap/modifiers/merge.cc:
4497         Likewise.
4498         * testsuite/23_containers/unordered_multiset/modifiers/extract.cc:
4499         Likewise.
4500         * testsuite/23_containers/unordered_multiset/modifiers/merge.cc:
4501         Likewise.
4502         * testsuite/23_containers/unordered_set/modifiers/extract.cc:
4503         Likewise.
4504         * testsuite/23_containers/unordered_set/modifiers/merge.cc:
4505         Likewise.
4506         * testsuite/24_iterators/headers/iterator/range_access_c++17.cc:
4507         Likewise.
4508         * testsuite/24_iterators/headers/iterator/synopsis_c++17.cc:
4509         Likewise.
4510         * testsuite/25_algorithms/clamp/1.cc: Likewise.
4511         * testsuite/25_algorithms/clamp/2.cc: Likewise.
4512         * testsuite/25_algorithms/clamp/constexpr.cc: Likewise.
4513         * testsuite/25_algorithms/clamp/requirements/explicit_instantiation/1.cc:
4514         Likewise.
4515         * testsuite/25_algorithms/clamp/requirements/explicit_instantiation/pod.cc:
4516         Likewise.
4517         * testsuite/26_numerics/headers/cmath/functions_std_c++17.cc:
4518         Likewise.
4519         * testsuite/26_numerics/headers/cmath/special_functions_global.cc:
4520         Likewise.
4521         * testsuite/27_io/basic_ostream/inserters_other/char/lwg2221.cc:
4522         Likewise.
4523         * testsuite/29_atomics/atomic/is_always_lock_free.cc: Likewise.
4524         * testsuite/29_atomics/atomic_integral/is_always_lock_free.cc:
4525         Likewise.
4526         * testsuite/30_threads/shared_lock/70766.cc: Likewise.
4527         * testsuite/30_threads/shared_mutex/cons/1.cc: Likewise.
4528         * testsuite/30_threads/shared_mutex/cons/assign_neg.cc:
4529         Likewise.
4530         * testsuite/30_threads/shared_mutex/cons/copy_neg.cc:
4531         Likewise.
4532         * testsuite/30_threads/shared_mutex/requirements/standard_layout.cc:
4533         Likewise.
4534         * testsuite/30_threads/shared_mutex/try_lock/1.cc: Likewise.
4535         * testsuite/30_threads/shared_mutex/try_lock/2.cc: Likewise.
4536         * testsuite/30_threads/shared_mutex/unlock/1.cc: Likewise.
4537
4538 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
4539
4540         PR libstdc++/96382
4541         * include/bits/stl_iterator.h (reverse_iterator): Friend
4542         declaration should not depend on __cplusplus.
4543
4544 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
4545
4546         * testsuite/experimental/filesystem/filesystem_error/cons.cc:
4547         Remove -std=gnu++17 option.
4548
4549 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
4550
4551         * testsuite/20_util/is_aggregate/value.cc: Adjust for changes to
4552         definition of aggregates in C++20.
4553         * testsuite/20_util/optional/requirements.cc: Adjust for
4554         defaulted comparisons in C++20.
4555
4556 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
4557
4558         * testsuite/20_util/tuple/78939.cc: Suppress warnings about
4559         deprecation of volatile-qualified structured bindings in C++20.
4560         * testsuite/20_util/variable_templates_for_traits.cc: Likewise
4561         for deprecation of is_pod in C++20
4562
4563 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
4564
4565         * testsuite/20_util/time_point_cast/rounding.cc: Remove
4566         duplicate dg-do directive and add c++17 effective target.
4567
4568 2020-07-31  Jonathan Wakely  <jwakely@redhat.com>
4569
4570         * src/c++17/floating_from_chars.cc (from_chars_impl): Use
4571         LC_ALL_MASK not LC_ALL.
4572
4573 2020-07-31  Richard Biener  <rguenther@suse.de>
4574
4575         PR debug/96383
4576         * testsuite/20_util/assume_aligned/3.cc: Use -g0.
4577
4578 2020-07-30  Jonathan Wakely  <jwakely@redhat.com>
4579
4580         * include/bits/basic_string.h (size_type, difference_type):
4581         Use allocator_traits to obtain the allocator's size_type and
4582         difference_type.
4583
4584 2020-07-30  Jonathan Wakely  <jwakely@redhat.com>
4585
4586         PR libstdc++/96279
4587         * src/c++17/floating_from_chars.cc (from_chars_impl): Use
4588         isinf unqualified.
4589         [!_GLIBCXX_USE_C99_STDLIB]: Use strtod for float and long
4590         double.
4591
4592 2020-07-30  Jonathan Wakely  <jwakely@redhat.com>
4593
4594         * testsuite/23_containers/unordered_multiset/cons/noexcept_default_construct.cc:
4595         Use allocator with the correct value type.
4596         * testsuite/23_containers/unordered_set/cons/noexcept_default_construct.cc:
4597         Likewise.
4598
4599 2020-07-30  Jonathan Wakely  <jwakely@redhat.com>
4600
4601         * testsuite/20_util/from_chars/4.cc: Pass non-const iterator
4602         to string::insert.
4603
4604 2020-07-30  Jonathan Wakely  <jwakely@redhat.com>
4605
4606         * include/bits/iterator_concepts.h (__detail::__cv_bool): New
4607         helper concept.
4608         (__detail::__integral_nonbool): Likewise.
4609         (__detail::__is_integer_like): Use __integral_nonbool.
4610         * testsuite/std/ranges/access/lwg3467.cc: New test.
4611
4612 2020-07-30  Jonathan Wakely  <jwakely@redhat.com>
4613
4614         * testsuite/20_util/from_chars/4.cc: Use dg-add-options ieee.
4615         * testsuite/29_atomics/atomic_float/1.cc: Likewise.
4616
4617 2020-07-30  Jonathan Wakely  <jwakely@redhat.com>
4618
4619         * testsuite/23_containers/vector/bool/72847.cc: Use the
4620         exceptions_enabled effective-target keyword instead of
4621         checking for an explicit -fno-exceptions option.
4622         * testsuite/util/testsuite_abi.cc (examine_symbol): Remove
4623         redundant try-catch.
4624         * testsuite/util/testsuite_allocator.h [!__cpp_exceptions]:
4625         Do not define check_allocate_max_size and memory_resource.
4626         * testsuite/util/testsuite_containers.h: Replace comment with
4627         #error if wrong standard dialect used.
4628         * testsuite/util/testsuite_shared.cc: Likewise.
4629
4630 2020-07-29  François Dumont  <fdumont@gcc.gnu.org>
4631
4632         * include/bits/hashtable_policy.h (_Node_iterator_base()): New.
4633         (operator==(const _Node_iterator_base&, const _Node_iterator_base&)):
4634         Make hidden friend.
4635         (operator!=(const _Node_iterator_base&, const _Node_iterator_base&)):
4636         Make hidden friend.
4637         (_Local_iterator_base<>): Inherits _Node_iterator_base.
4638         (_Local_iterator_base<>::_M_cur): Remove.
4639         (_Local_iterator_base<>::_M_curr()): Remove.
4640         (operator==(const _Local_iterator_base&, const _Local_iterator_base&)):
4641         Remove.
4642         (operator!=(const _Local_iterator_base&, const _Local_iterator_base&)):
4643         Remove.
4644         * include/debug/unordered_map (unordered_map<>::_M_invalidate): Adapt.
4645         (unordered_multimap<>::_M_invalidate): Adapt.
4646         * include/debug/unordered_set (unordered_set<>::_M_invalidate): Adapt.
4647         (unordered_multiset<>::_M_invalidate): Adapt.
4648
4649 2020-07-29  David Edelsohn  <dje.gcc@gmail.com>
4650             Jonathan Wakely  <jwakely@redhat.com>
4651             Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
4652
4653         * testsuite/lib/dg-options.exp (add_options_for_libatomic): Add
4654         target powerpc-ibm-aix* and powerpc*-*-darwin*.
4655         * testsuite/29_atomics/atomic_float/value_init.cc: Add options
4656         for libatomic.
4657
4658 2020-07-29  François Dumont  <fdumont@gcc.gnu.org>
4659
4660         * include/bits/hashtable.h
4661         (_Hashtable(_Hashtable&& __ht, __node_alloc_type&& __a, true_type)):
4662         Add noexcept qualification.
4663         (_Hashtable(_Hashtable&&)): Fix noexcept qualification.
4664         (_Hashtable(_Hashtable&&, const allocator_type&)): Add noexcept
4665         qualification.
4666         * include/bits/unordered_map.h
4667         (unordered_map(unordered_map&&, const allocator_type&)): Add noexcept
4668         qualification.
4669         (unordered_multimap(unordered_multimap&&, const allocator_type&)):
4670         Likewise.
4671         * include/bits/unordered_set.h
4672         (unordered_set(unordered_set&&, const allocator_type&)): Likewise.
4673         (unordered_multiset(unordered_multiset&&, const allocator_type&)):
4674         Likewise.
4675         * include/debug/unordered_map
4676         (unordered_map(unordered_map&&, const allocator_type&)): Likewise.
4677         (unordered_multimap(unordered_multimap&&, const allocator_type&)):
4678         Likewise.
4679         * include/debug/unordered_set
4680         (unordered_set(unordered_set&&, const allocator_type&)): Likewise.
4681         (unordered_multiset(unordered_multiset&&, const allocator_type&)):
4682         Likewise.
4683         * testsuite/23_containers/unordered_map/allocator/default_init.cc:
4684         New test.
4685         * testsuite/23_containers/unordered_map/cons/noexcept_default_construct.cc:
4686         New test.
4687         * testsuite/23_containers/unordered_map/cons/noexcept_move_construct.cc:
4688         New test.
4689         * testsuite/23_containers/unordered_map/modifiers/move_assign.cc:
4690         New test.
4691         * testsuite/23_containers/unordered_multimap/cons/noexcept_default_construct.cc:
4692         New test.
4693         * testsuite/23_containers/unordered_multimap/cons/noexcept_move_construct.cc:
4694         New test.
4695         * testsuite/23_containers/unordered_multiset/cons/noexcept_default_construct.cc:
4696         New test.
4697         * testsuite/23_containers/unordered_multiset/cons/noexcept_move_construct.cc:
4698         New test.
4699         * testsuite/23_containers/unordered_set/allocator/default_init.cc:
4700         New test.
4701         * testsuite/23_containers/unordered_set/cons/noexcept_default_construct.cc:
4702         New test.
4703         * testsuite/23_containers/unordered_set/cons/noexcept_move_construct.cc:
4704         New test.
4705
4706 2020-07-28  François Dumont  <fdumont@gcc.gnu.org>
4707
4708         * include/bits/hashtable.h
4709         (_Hashtable<>(_InputIterator, _InputIterator, size_t, const _H1&,
4710         const _H2&, const _Hash&, const _Equal&, const _ExtractKey&,
4711         const allocator_type&, true_type)): New.
4712         (_Hashtable<>(_InputIterator, _InputIterator, size_t, const _H1&,
4713         const _H2&, const _Hash&, const _Equal&, const _ExtractKey&,
4714         const allocator_type&, false_type)): New.
4715         (_Hashtable<>(_InputIterator, _InputIterator, size_t, const _H1&,
4716         const _H2&, const _Hash&, const _Equal&, const _ExtractKey&,
4717         const allocator_type&)): Delegate to latters.
4718         (operator=(initializer_list<value_type>)): Rehash if too small.
4719         (_M_insert(_Arg&&, const _NodeGenerator&, true_type)): Remove
4720         size_t len parameter.
4721         * include/bits/hashtable_policy.h (_Insert_base<>::_M_insert_range):
4722         Do not try to get input range distance.
4723         * testsuite/23_containers/unordered_set/cons/bucket_hint.cc: New test.
4724         * testsuite/23_containers/unordered_set/modifiers/insert.cc: New test.
4725
4726 2020-07-27  François Dumont  <fdumont@gcc.gnu.org>
4727
4728         * include/bits/hashtable_policy.h (_Map_base<>::at): Use
4729         _Hashtable<>::find.
4730         (_Hashtable_base<>::_Equal_hash_code<>::_S_node_equals):New.
4731         (_Hashtable_base<>::_M_node_equals): New, use latter.
4732         (_Equality<_Key, _Value, _Alloc, _ExtractKey, _Equal, _H1, _H2, _Hash,
4733         _RehashPolicy, false>::_M_equal): Adapt to use latter.
4734         * include/bits/hashtable.h (_Hashtable<>::_M_update_bbegin): New.
4735         (_Hashtable<>::_M_assign): Use latter.
4736         (_Hashtable<>::_M_move_assign): Likewise.
4737         (_Hashtable<>(_Hashtable<>&&)): Likewise.
4738         (_Hashtable<>(_Hashtable<>&&, const allocator_type&)): Likewise.
4739         (_Hashtable<>::swap): Likewise.
4740         (_Hashtable<>::find): Build iterator directly from _M_find_node result.
4741         (_Hashtable<>::count): Use _Hashtable<>::find.
4742         (_Hashtable<>::equal_range): Likewise.
4743         (_Hashtable<>::_M_erase(false_type, const key_type&)): Use
4744         _M_node_equals.
4745
4746 2020-07-27  Jonathan Wakely  <jwakely@redhat.com>
4747
4748         * src/c++17/floating_from_chars.cc (from_chars_impl): Ensure
4749         that FE_NEAREST is used.
4750         * testsuite/20_util/from_chars/4.cc: Do not use if constexpr in
4751         a { target c++14 } test.
4752         [!_GLIBCXX_HAVE_USELOCALE]: Disable all tests.
4753         * testsuite/20_util/from_chars/5.cc [!_GLIBCXX_HAVE_USELOCALE]:
4754         Likewise.
4755         * testsuite/20_util/from_chars/6.cc: New test.
4756
4757 2020-07-22  Jonathan Wakely  <jwakely@redhat.com>
4758
4759         * include/std/future (future, shared_future, promise): Add
4760         static assertions to the primary template to reject array and
4761         function types.
4762         * testsuite/30_threads/future/requirements/lwg3458.cc: New test.
4763         * testsuite/30_threads/promise/requirements/lwg3466.cc: New test.
4764         * testsuite/30_threads/shared_future/requirements/lwg3458.cc: New test.
4765
4766 2020-07-22  Jonathan Wakely  <jwakely@redhat.com>
4767
4768         * include/bits/stl_iterator.h (reverse_iterator): Constrain
4769         converting constructor and converting assignment operator.
4770         Access source iterator's data member directly instead of
4771         calling base().
4772         (move_iterator): Likewise.
4773         * testsuite/24_iterators/move_iterator/dr3435.cc: New test.
4774         * testsuite/24_iterators/reverse_iterator/dr3435.cc: New test.
4775
4776 2020-07-20  Jonathan Wakely  <jwakely@redhat.com>
4777
4778         * acinclude.m4 (libtool_VERSION): Bump version.
4779         * config.h.in: Regenerate.
4780         * config/abi/pre/gnu.ver: Add GLIBCXX_3.4.29 version and new
4781         exports.
4782         * config/os/gnu-linux/ldbl-extra.ver: Add _GLIBCXX_LDBL_3.4.29
4783         version and new export.
4784         * configure: Regenerate.
4785         * configure.ac: Check for <xlocale.h> and uselocale.
4786         * crossconfig.m4: Add macro or checks for uselocale.
4787         * include/std/charconv (from_chars): Declare overloads for
4788         float, double, and long double.
4789         * src/c++17/Makefile.am: Add new file.
4790         * src/c++17/Makefile.in: Regenerate.
4791         * src/c++17/floating_from_chars.cc: New file.
4792         (from_chars): Define for float, double, and long double.
4793         * testsuite/20_util/from_chars/1_c++20_neg.cc: Prune extra
4794         diagnostics caused by new overloads.
4795         * testsuite/20_util/from_chars/1_neg.cc: Likewise.
4796         * testsuite/20_util/from_chars/2.cc: Check leading '+'.
4797         * testsuite/20_util/from_chars/4.cc: New test.
4798         * testsuite/20_util/from_chars/5.cc: New test.
4799         * testsuite/util/testsuite_abi.cc: Add new symbol versions.
4800
4801 2020-07-20  Jonathan Wakely  <jwakely@redhat.com>
4802
4803         * include/bits/istream.tcc
4804         (basic_istream::get(__streambuf_type&, char_type): Use unsigned
4805         long long for counter and check if it would overflow _M_gcount.
4806         * testsuite/27_io/basic_istream/get/char/lwg3464.cc: New test.
4807         * testsuite/27_io/basic_istream/get/wchar_t/lwg3464.cc: New test.
4808
4809 2020-07-17  Iain Sandoe  <iain@sandoe.co.uk>
4810
4811         * include/std/coroutine: Mark the methods of the
4812         trivial awaitables as constexpr.
4813
4814 2020-07-14  David Edelsohn  <dje.gcc@gmail.com>
4815
4816         * config/os/aix/t-aix: Set BITS from compiler cpp macro.
4817
4818 2020-07-13  Jonathan Wakely  <jwakely@redhat.com>
4819
4820         PR libstdc++/94749
4821         PR libstdc++/96161
4822         * include/bits/istream.tcc (basic_istream::ignore(streamsize))
4823         [n == max]: Check overflow conditions on _M_gcount. Rely on
4824         the fact that either EOF or the delimiter was reached.
4825         [n < max]: Check _M_gcount < n before checking for EOF or
4826         delimiter.
4827         (basic_istream::ignore(streamsize, char_type): Likewise.
4828         * src/c++98/compatibility.cc (istream::ignore(streamsize))
4829         (wistream::ignore(streamsize)): Likewise.
4830         * src/c++98/istream.cc (istream::ignore(streamsize, char_type))
4831         (wistream::ignore(streamsize, char_type)): Likewise.
4832         * testsuite/27_io/basic_istream/ignore/char/94749.cc: Check that
4833         delimiter is discarded if the number of characters ignored
4834         doesn't fit in streamsize.
4835         * testsuite/27_io/basic_istream/ignore/wchar_t/94749.cc:
4836         Likewise.
4837         * testsuite/27_io/basic_istream/ignore/char/96161.cc: New test.
4838         * testsuite/27_io/basic_istream/ignore/wchar_t/96161.cc: New test.
4839
4840 2020-07-08  François Dumont  <fdumont@gcc.gnu.org>
4841
4842         * include/bits/stl_tree.h (_Rb_tree_impl(_Rb_tree_impl&&)): Add noexcept
4843         qualification based only on _Compare one.
4844         * testsuite/23_containers/map/cons/noexcept_move_construct.cc: Add
4845         static asserts.
4846         * testsuite/23_containers/multimap/cons/noexcept_move_construct.cc:
4847         Likewise.
4848         * testsuite/23_containers/multiset/cons/noexcept_move_construct.cc:
4849         Likewise.
4850         * testsuite/23_containers/set/cons/noexcept_move_construct.cc: Likewise.
4851
4852 2020-07-07  Jonathan Wakely  <jwakely@redhat.com>
4853
4854         * include/std/limits: Whitespace changes.
4855
4856 2020-07-07  Jonathan Wakely  <jwakely@redhat.com>
4857
4858         * include/Makefile.am: Remove bits/int_limits.h.
4859         * include/Makefile.in: Regenerate.
4860         * include/bits/int_limits.h: Removed.
4861         * include/bits/parse_numbers.h (_Select_int_base): Replace
4862         __int_limits with __int_traits.
4863         * include/bits/range_access.h (_SSize::operator()): Likewise.
4864         * include/ext/numeric_traits.h (__numeric_traits_integer): Add
4865         static assertion.
4866         (__int_traits): New alias template.
4867         * include/std/bit (__rotl, __rotr, __countl_zero, __countl_one)
4868         (__countr_zero, __countr_one, __popcount, __bit_ceil)
4869         (__bit_floor, __bit_width) Replace __int_limits with
4870         __int_traits.
4871         * include/std/charconv (__to_chars_8, __from_chars_binary)
4872         (__from_chars_alpha_to_num, from_chars): Likewise.
4873         * include/std/memory_resource (polymorphic_allocator::allocate)
4874         (polymorphic_allocator::allocate_object): Likewise.
4875         * include/std/string_view (basic_string_view::_S_compare):
4876         Likewise.
4877         * include/std/utility (cmp_equal, cmp_less, in_range): Likewise.
4878
4879 2020-07-07  Jonathan Wakely  <jwakely@redhat.com>
4880
4881         * include/std/limits: Whitespace changes.
4882
4883 2020-07-06  Jonathan Wakely  <jwakely@redhat.com>
4884
4885         * include/std/optional (_Optional_payload_base, _Optional_base)
4886         (optional, __optional_hash_call_base): Adjust whitespace and
4887         other formatting. Remove redundant && tokens on template
4888         arguments to type traits.
4889
4890 2020-07-06  Jonathan Wakely  <jwakely@redhat.com>
4891
4892         * include/std/optional (make_optional): Add enable_if
4893         constraints and noexcept-specifier to each overload.
4894         * testsuite/20_util/optional/make_optional-2.cc: New test.
4895
4896 2020-07-06  Jonathan Wakely  <jwakely@redhat.com>
4897
4898         PR libstdc++/96036
4899         * include/std/optional (optional): Add noexcept-specifier to
4900         every constructor, assignment operator, emplace function and
4901         dereference operator.
4902         * testsuite/20_util/optional/assignment/noexcept.cc: New test.
4903         * testsuite/20_util/optional/cons/noexcept.cc: New test.
4904
4905 2020-07-06  Jonathan Wakely  <jwakely@redhat.com>
4906
4907         PR libstdc++/96063
4908         * include/bits/fs_dir.h: Use consistent tag in class-head.
4909         * include/bits/localefwd.h: Likewise.
4910         * include/bits/regex.h: Likewise.
4911         * include/bits/stl_map.h: Likewise.
4912         * include/bits/stl_multimap.h: Likewise.
4913         * include/bits/stl_multiset.h: Likewise.
4914         * include/bits/stl_set.h: Likewise.
4915         * include/std/complex: Likewise.
4916         * include/std/functional: Likewise.
4917         * include/std/future: Likewise.
4918         * include/std/system_error: Likewise.
4919         * include/std/thread: Likewise.
4920         * include/std/tuple: Likewise.
4921         * include/std/type_traits: Likewise.
4922         * include/std/valarray: Likewise.
4923
4924 2020-07-02  Jonathan Wakely  <jwakely@redhat.com>
4925
4926         * testsuite/27_io/basic_ios/conv/voidptr.cc: Add c++98_only
4927         target selector.
4928
4929 2020-07-02  Jonathan Wakely  <jwakely@redhat.com>
4930
4931         * testsuite/18_support/headers/cstdalign/std_c++0x_neg.cc: Add
4932         c++98_only target selector.
4933         * testsuite/18_support/headers/cstdbool/std_c++0x_neg.cc:
4934         Likewise.
4935         * testsuite/18_support/headers/cstdint/std_c++0x_neg.cc:
4936         Likewise.
4937         * testsuite/18_support/headers/new/synopsis_cxx98.cc: Likewise.
4938         * testsuite/19_diagnostics/headers/system_error/std_c++0x_neg.cc:
4939         Likewise.
4940         * testsuite/20_util/headers/type_traits/std_c++0x_neg.cc:
4941         Likewise.
4942         * testsuite/23_containers/headers/array/std_c++0x_neg.cc:
4943         Likewise.
4944         * testsuite/23_containers/headers/tuple/std_c++0x_neg.cc:
4945         Likewise.
4946         * testsuite/23_containers/headers/unordered_map/std_c++0x_neg.cc:
4947         Likewise.
4948         * testsuite/23_containers/headers/unordered_set/std_c++0x_neg.cc:
4949         Likewise.
4950         * testsuite/26_numerics/headers/ccomplex/std_c++0x_neg.cc:
4951         Likewise.
4952         * testsuite/26_numerics/headers/cfenv/std_c++0x_neg.cc:
4953         Likewise.
4954         * testsuite/26_numerics/headers/cmath/c99_classification_macros_c++98.cc:
4955         Likewise.
4956         * testsuite/26_numerics/headers/ctgmath/std_c++0x_neg.cc:
4957         Likewise.
4958         * testsuite/26_numerics/headers/random/std_c++0x_neg.cc:
4959         Likewise.
4960         * testsuite/27_io/headers/cinttypes/std_c++0x_neg.cc: Likewise.
4961         * testsuite/28_regex/headers/regex/std_c++0x_neg.cc: Likewise.
4962         * testsuite/29_atomics/headers/atomic/std_c++0x_neg.cc:
4963         Likewise.
4964         * testsuite/30_threads/headers/condition_variable/std_c++0x_neg.cc:
4965         Likewise.
4966         * testsuite/30_threads/headers/future/std_c++0x_neg.cc:
4967         Likewise.
4968         * testsuite/30_threads/headers/mutex/std_c++0x_neg.cc: Likewise.
4969         * testsuite/30_threads/headers/thread/std_c++0x_neg.cc:
4970         Likewise.
4971
4972 2020-07-02  Ville Voutilainen  <ville.voutilainen@gmail.com>
4973
4974         PR libstdc++/91807
4975         * include/std/variant
4976         (_Copy_assign_base::operator=(const _Copy_assign_base&):
4977         Do the move-assignment from a temporary so that the temporary
4978         is constructed with an explicit index.
4979         * testsuite/20_util/variant/91807.cc: New.
4980
4981 2020-07-02  Jonathan Wakely  <jwakely.gcc@gmail.com>
4982
4983         PR libstdc++/91153
4984         PR target/93224
4985         * testsuite/29_atomics/atomic_float/1.cc: Use different values
4986         for tests.
4987         * testsuite/29_atomics/atomic_ref/float.cc: Likewise.
4988
4989 2020-07-01  Jonathan Wakely  <jwakely@redhat.com>
4990
4991         PR libstdc++/94627
4992         * include/bits/regex.h (operator==, operator!=): Remove noexcept
4993         equality comparisons for match_results.
4994         * testsuite/28_regex/match_results/94627.cc: New test.
4995
4996 2020-07-01  Martin Sebor  <msebor@redhat.com>
4997
4998         * testsuite/21_strings/basic_string_view/cons/char/nonnull.cc: Adjust
4999         text of expected warning.
5000         * testsuite/21_strings/basic_string_view/cons/wchar_t/nonnull.cc: Same.
5001         * testsuite/21_strings/basic_string_view/operations/compare/char/nonnull.cc: Same.
5002         * testsuite/21_strings/basic_string_view/operations/find/char/nonnull.cc: Same.
5003         * testsuite/21_strings/basic_string_view/operations/rfind/char/nonnull.cc: Same.
5004
5005 2020-06-29  Ville Voutilainen  <ville.voutilainen@gmail.com>
5006
5007         Revert:
5008         2020-06-28  Ville Voutilainen  <ville.voutilainen@gmail.com>
5009
5010         * include/bits/basic_string.h (string(_CharT*, const _Alloc&)):
5011         Add a __nonnull__ attribute.
5012         * testsuite/21_strings/basic_string/cons/char/nonnull.cc: New.
5013         * testsuite/21_strings/basic_string/cons/wchar_t/nonnull.cc: Likewise.
5014
5015 2020-06-28  Ville Voutilainen  <ville.voutilainen@gmail.com>
5016
5017         * include/bits/basic_string.h (string(_CharT*, const _Alloc&)):
5018         Add a __nonnull__ attribute.
5019         * testsuite/21_strings/basic_string/cons/char/nonnull.cc: New.
5020         * testsuite/21_strings/basic_string/cons/wchar_t/nonnull.cc: Likewise.
5021
5022 2020-06-28  Ville Voutilainen  <ville.voutilainen@gmail.com>
5023
5024         PR libstdc++/95915
5025         * include/std/type_traits (is_literal_type, is_literal_type_v):
5026         Deprecate in C++17.
5027         * include/std/variant (_Uninitialized):
5028         Adjust the condition and the comment.
5029         * testsuite/20_util/is_literal_type/deprecated-1z.cc: New.
5030         * testsuite/20_util/is_literal_type/requirements/explicit_instantiation.cc:
5031         Adjust.
5032         * testsuite/20_util/is_literal_type/requirements/typedefs.cc: Likewise.
5033         * testsuite/20_util/is_literal_type/value.cc: Likewise.
5034         * testsuite/20_util/optional/constexpr/nullopt.cc:
5035         Use __is_literal_type directly.
5036         * testsuite/20_util/optional/nullopt.cc: Likewise.
5037         * testsuite/20_util/variable_templates_for_traits.cc: Adjust.
5038         * testsuite/20_util/variant/95915.cc: New.
5039         * testsuite/20_util/variant/compile.cc: Add new test.
5040         * testsuite/experimental/optional/constexpr/nullopt.cc:
5041         Use __is_literal_type directly.
5042         * testsuite/experimental/optional/nullopt.cc: Likewise.
5043         * testsuite/experimental/type_traits/value.cc: Adjust.
5044         * testsuite/util/testsuite_common_types.h:
5045         Use __is_literal_type directly.
5046
5047 2020-06-24  Jonathan Wakely  <jwakely@redhat.com>
5048
5049         * include/std/charconv (__from_chars_binary): Ignore leading zeros.
5050         * testsuite/20_util/from_chars/1.cc: Check "0x1" for all bases,
5051         not just 10 and 16.
5052         * testsuite/20_util/from_chars/3.cc: New test.
5053
5054 2020-06-24  Jonathan Wakely  <jwakely@redhat.com>
5055
5056         * include/bits/stl_algobase.h (__find_if): Add FALLTHRU markers.
5057         * include/std/charconv (__detail::__to_chars): Avoid
5058         -Wsign-compare warning.
5059
5060 2020-06-24  Jonathan Wakely  <jwakely@redhat.com>
5061
5062         PR libstdc++/95851
5063         * include/std/charconv (__to_chars_i): Check for zero-sized
5064         buffer unconditionally.
5065         * testsuite/20_util/to_chars/95851.cc: New test.
5066
5067 2020-06-23  Jonathan Wakely  <jwakely@redhat.com>
5068
5069         * testsuite/20_util/from_chars/1_c++20_neg.cc: Check enumeration
5070         type.
5071         * testsuite/20_util/from_chars/1_neg.cc: Likewise. Move dg-error
5072         directives outside preprocessor condition.
5073
5074 2020-06-23  Jonathan Wakely  <jwakely@redhat.com>
5075
5076         PR libstdc++/95832
5077         * include/std/variant (__detail::__variant::_Build_FUN): Remove
5078         partial specialization to prevent narrowing conversions to bool.
5079         * testsuite/20_util/variant/compile.cc: Test non-narrowing
5080         conversions to bool.
5081         * testsuite/20_util/variant/run.cc: Likewise.
5082
5083 2020-06-23  Jonathan Wakely  <jwakely@redhat.com>
5084
5085         * doc/Makefile.in: Regenerate.
5086         * include/Makefile.in: Regenerate.
5087         * libsupc++/Makefile.in: Regenerate.
5088         * po/Makefile.in: Regenerate.
5089         * python/Makefile.in: Regenerate.
5090         * src/Makefile.in: Regenerate.
5091         * src/c++11/Makefile.in: Regenerate.
5092         * src/c++17/Makefile.in: Regenerate.
5093         * src/c++98/Makefile.in: Regenerate.
5094         * src/filesystem/Makefile.in: Regenerate.
5095         * testsuite/Makefile.in: Regenerate.
5096
5097 2020-06-22  David Edelsohn  <dje.gcc@gmail.com>
5098
5099         * Makefile.am: Use -include.
5100         * Makefile.in: Regenerate.
5101
5102 2020-06-21  David Edelsohn  <dje.gcc@gmail.com>
5103
5104         * Makefile.am (tmake_file): Build and install AIX-style FAT libraries.
5105         * Makefile.in: Regenerate.
5106         * configure.ac (tmake_file): Substitute.
5107         * configure: Regenerate.
5108         * configure.host (aix*): Define tmake_file.
5109         * config/os/aix/t-aix: New file.
5110
5111 2020-06-20  Jason Merrill  <jason@redhat.com>
5112
5113         * testsuite/24_iterators/move_iterator/rel_ops_c++20.cc:
5114         Remove greedy_ops tests.
5115         * testsuite/24_iterators/reverse_iterator/rel_ops_c++20.cc:
5116         Remove greedy_ops tests.
5117
5118 2020-06-19  Jonathan Wakely  <jwakely@redhat.com>
5119
5120         PR libstdc++/95765
5121         * include/bits/stl_algobase.h (__size_to_integer(float))
5122         (__size_to_integer(double), __size_to_integer(long double))
5123         (__size_to_integer(__float128)): Cast return type explicitly.
5124         * include/bits/stl_uninitialized.h (__uninitialized_default_1<true>):
5125         Remove unused typedef.
5126
5127 2020-06-19  Jonathan Wakely  <jwakely@redhat.com>
5128
5129         * include/bits/stl_pair.h (_Index_tuple): Remove redundant
5130         namespace qualification.
5131         (pair::pair(tuple<>&, tuple<>&, _Index_tuple, _Index_tuple)):
5132         Likewise.
5133         * include/std/tuple (_Head_base, _Tuple_impl, tuple_size)
5134         (tuple_element, __get_helper, get, __make_tuple_impl)
5135         (__make_1st_indices, __tuple_concater)
5136         (pair::pair(tuple<>&, tuple<>&, _Index_tuple, _Index_tuple)):
5137         Likewise.
5138         * include/std/utility (tuple_element, __is_tuple_like_impl)
5139         (tuple_size, __pair_get, get): Likewise.
5140
5141 2020-06-19  Jonathan Wakely  <jwakely@redhat.com>
5142
5143         * include/bits/std_function.h (function): Define all member
5144         functions inline.
5145
5146 2020-06-19  Marc Glisse  <marc.glisse@inria.fr>
5147
5148         * include/bits/stl_algo.h (__includes): Simplify the code.
5149
5150 2020-06-19  Marc Glisse  <marc.glisse@inria.fr>
5151
5152         * include/std/optional (optional()): Explicitly define it.
5153
5154 2020-06-17  Jonathan Wakely  <jwakely@redhat.com>
5155
5156         PR libstdc++/94540
5157         * include/bits/stl_uninitialized.h (__uninitialized_default_1<true>):
5158         Construct the first value at *__first instead of on the stack.
5159         (__uninitialized_default_n_1<true>): Likewise.
5160         Improve comments on several of the non-standard algorithms.
5161         * testsuite/20_util/specialized_algorithms/uninitialized_default/94540.cc:
5162         New test.
5163         * testsuite/20_util/specialized_algorithms/uninitialized_default_n/94540.cc:
5164         New test.
5165         * testsuite/20_util/specialized_algorithms/uninitialized_value_construct/94540.cc:
5166         New test.
5167         * testsuite/20_util/specialized_algorithms/uninitialized_value_construct_n/94540.cc:
5168         New test.
5169         * testsuite/23_containers/vector/cons/94540.cc: New test.
5170
5171 2020-06-17  Jonathan Wakely  <jwakely@redhat.com>
5172
5173         * testsuite/20_util/specialized_algorithms/uninitialized_default_n/sizes.cc:
5174         Replace Value type with int so trivial code path is used.
5175         * testsuite/20_util/specialized_algorithms/uninitialized_value_construct_n/sizes.cc:
5176         Likewise.
5177
5178 2020-06-17  Jonathan Wakely  <jwakely@redhat.com>
5179
5180         * include/bits/stl_uninitialized.h (uninitialized_fill_n): Only
5181         use std::fill_n when the size is an integral type.
5182         (__uninitialized_default_n): Likewise.
5183         * testsuite/20_util/specialized_algorithms/uninitialized_default_n/sizes.cc:
5184         New test.
5185         * testsuite/20_util/specialized_algorithms/uninitialized_fill_n/sizes.cc:
5186         New test.
5187         * testsuite/20_util/specialized_algorithms/uninitialized_value_construct_n/sizes.cc:
5188         New test.
5189
5190 2020-06-16  Jonathan Wakely  <jwakely@redhat.com>
5191
5192         PR libstdc++/95282
5193         * include/bits/atomic_base.h (__atomic_impl::load): Use the _Val
5194         alias instead of deducing _Tp as an unqualified type.
5195         (__atomic_impl::exchange): Use the _Val alias to remove volatile
5196         from the reinterpret_cast result type.
5197
5198 2020-06-16  Jonathan Wakely  <jwakely@redhat.com>
5199
5200         * include/std/atomic (atomic): Add static assertions.
5201         * testsuite/29_atomics/atomic/requirements/types_neg.cc: New test.
5202
5203 2020-06-16  Patrick Palka  <ppalka@redhat.com>
5204
5205         PR libstdc++/94003
5206         * testsuite/20_util/is_constructible/94003.cc: New test.
5207
5208 2020-06-15  Jonathan Wakely  <jwakely@redhat.com>
5209
5210         * include/bits/char_traits.h (__cpp_lib_constexpr_char_traits):
5211         Update value for C++20.
5212         * include/std/version (__cpp_lib_constexpr_char_traits): Likewise.
5213         * testsuite/21_strings/char_traits/requirements/constexpr_functions_c++17.cc:
5214         Update expected value.
5215         * testsuite/21_strings/char_traits/requirements/constexpr_functions_c++20.cc:
5216         Likewise.
5217
5218 2020-06-15  Paul Keir  <paul.keir@uws.ac.uk>
5219
5220         * include/bits/char_traits.h (char_traits::move): constexpr move with
5221         overlap was using copy_backward incorrectly.
5222         * testsuite/21_strings/char_traits/requirements/constexpr_functions_c++20.cc:
5223         New test.
5224
5225 2020-06-12  Jonathan Wakely  <jwakely@redhat.com>
5226
5227         * testsuite/29_atomics/atomic_flag/clear/1.cc: Also test clear()
5228         when the value is currently set.
5229         * testsuite/29_atomics/atomic_flag/test_and_set/explicit.cc:
5230         Actually check the return value.
5231         * testsuite/29_atomics/atomic_flag/test_and_set/implicit.cc:
5232         Likewise.
5233
5234 2020-06-12  Jonathan Wakely  <jwakely@redhat.com>
5235
5236         * include/bits/atomic_base.h (atomic_flag::test): Add missing
5237         const qualifiers.
5238         * testsuite/29_atomics/atomic_flag/test/explicit.cc: Add
5239         dg-options and verify results of test function.
5240         * testsuite/29_atomics/atomic_flag/test/implicit.cc: Likewise.
5241
5242 2020-06-11  Jonathan Wakely  <jwakely@redhat.com>
5243
5244         PR libstdc++/94749
5245         * include/bits/istream.tcc (basic_istream::ignore(streamsize, CharT)):
5246         Only discard an extra character if we didn't already reach the
5247         maximum number.
5248         * src/c++98/istream.cc (istream::ignore(streamsiz, char))
5249         (wistream::ignore(streamsize, wchar_t)): Likewise.
5250         * testsuite/27_io/basic_istream/ignore/char/94749.cc: New test.
5251         * testsuite/27_io/basic_istream/ignore/wchar_t/94749.cc: New test.
5252
5253 2020-06-10  Patrick Palka  <ppalka@redhat.com>
5254
5255         PR libstdc++/95578
5256         * include/bits/ranges_algo.h (__lexicographical_compare_fn):
5257         Also check that the iterator and sentinel have the same type before
5258         applying the unwrapping optimization for __normal_iterator.
5259         Split the check into two, one for the first iterator/sentinel
5260         pair and another for second iterator/sentinel pair.  Remove uses
5261         of __niter_base, and remove uses of std::move on a
5262         __normal_iterator.
5263         * include/bits/ranges_algobase.h (__equal_fn): Likewise.
5264         (__copy_or_move): Likewise.  Perform similar adjustments for
5265         the reverse_iterator and move_iterator optimizations.  Inline
5266         the checks into the if-constexprs, and use using-declarations to
5267         make them less visually noisy.  Remove uses of __niter_wrap.
5268         (__copy_or_move_backward): Likewise.
5269         * testsuite/25_algorithms/copy/95578.cc: New test.
5270         * testsuite/25_algorithms/copy_backward/95578.cc: New test.
5271         * testsuite/25_algorithms/equal/95578.cc: New test.
5272         * testsuite/25_algorithms/lexicographical_compare/95578.cc: New test.
5273         * testsuite/25_algorithms/move/95578.cc: New test.
5274         * testsuite/25_algorithms/move_backward/95578.cc: New test.
5275
5276 2020-06-10  François Dumont  <fdumont@gcc.gnu.org>
5277             Jonathan Wakely  <jwakely@redhat.com>
5278
5279         * include/bits/deque.tcc (__lex_cmp_dit): New.
5280         (__lexicographical_compare_aux1): Define overloads for deque
5281         iterators.
5282         * include/bits/stl_algobase.h (__lexicographical_compare::__3way):
5283         New static member function.
5284         (__lexicographical_compare<true>::__3way): Likewise.
5285         (__lexicographical_compare<true>::__lc): Use __3way.
5286         (__lexicographical_compare_aux): Rename to
5287         __lexicographical_compare_aux1 and declare overloads for deque
5288         iterators.
5289         (__lexicographical_compare_aux): Define new forwarding function
5290         that calls __lexicographical_compare_aux1 and declare new overloads
5291         for safe iterators.
5292         (lexicographical_compare): Do not use __niter_base on
5293         parameters.
5294         * include/debug/safe_iterator.tcc
5295         (__lexicographical_compare_aux): Define overloads for safe
5296         iterators.
5297         * testsuite/25_algorithms/lexicographical_compare/1.cc: Add
5298         checks with random access iterators.
5299         * testsuite/25_algorithms/lexicographical_compare/deque_iterators/1.cc:
5300         New test.
5301
5302 2020-06-09  Jonathan Wakely  <jwakely@redhat.com>
5303
5304         * include/bits/stl_iterator.h (move_iterator::operator=): Define.
5305         * testsuite/24_iterators/move_iterator/dr3265.cc: New test.
5306
5307 2020-06-09  Jonathan Wakely  <jwakely@redhat.com>
5308
5309         * include/std/optional (bad_optional_access): Define default
5310         constructor and destructor as defaulted.
5311         * testsuite/20_util/optional/bad_access.cc: New test.
5312
5313 2020-06-08  Jonathan Wakely  <jwakely@redhat.com>
5314
5315         * testsuite/20_util/default_delete/48631_neg.cc: Adjust dg-error
5316         line number.
5317         * testsuite/20_util/default_delete/void_neg.cc: Likewise.
5318
5319 2020-06-08  Jonathan Wakely  <jwakely@redhat.com>
5320
5321         * include/bits/unique_ptr.h (operator<<): Define for C++20.
5322         * testsuite/20_util/unique_ptr/io/lwg2948.cc: New test.
5323
5324 2020-06-04  Jonathan Wakely  <jwakely@redhat.com>
5325
5326         * include/bits/iterator_concepts.h (__detail::__ptr, __detail::__ref)
5327         (__detail::__cat, __detail::__diff): Move to class scope in the
5328         relevant __iterator_traits specializations.
5329         (__iterator_traits<>): Use nested class templates instead of ones from
5330         namespace __detail.
5331         * include/bits/stl_iterator.h (__detail::__common_iter_ptr): Move to
5332         class scope in iterator_traits<common_iterator<I, S>>.
5333         (iterator_traits<common_iterator<I, S>>): Use nested class template
5334         instead of __detail::__common_iter_ptr.
5335
5336 2020-06-04  François Dumont  <fdumont@gcc.gnu.org>
5337
5338         * include/bits/stl_algo.h (__copy_n_a): Move to ...
5339         * include/bits/stl_algobase.h (__copy_n_a): ...here. Add __strict
5340         parameter.
5341         (__copy_n_a(istreambuf_iterator<>, _Size, _Deque_iterator<>, bool)):
5342         Declare.
5343         (__niter_base(const _Safe_iterator<_Ite, _Seq,
5344         random_access_iterator_tag>&)): Declare.
5345         (__copy_move_a2(istreambuf_iterator<>, istreambuf_iterator<>,
5346         _Deque_iterator<>)): Declare.
5347         * include/bits/deque.tcc
5348         (__copy_move_a2(istreambuf_iterator<>, istreambuf_iterator<>,
5349         _Deque_iterator<>)): New.
5350         (__copy_n_a(istreambuf_iterator<>, _Size, _Deque_iterator<>, bool)):
5351         New.
5352         * include/bits/streambuf_iterator.h
5353         (__copy_n_a(istreambuf_iterator<>, _Size, _CharT*, bool)): Adapt.
5354         * include/debug/safe_iterator.tcc (__niter_base): New.
5355         * testsuite/25_algorithms/copy/streambuf_iterators/char/4.cc
5356         (test03): New.
5357         * testsuite/25_algorithms/copy/streambuf_iterators/char/debug/deque_neg.cc:
5358         New test.
5359         * testsuite/25_algorithms/copy_n/debug/istreambuf_ite_deque_neg.cc:
5360         New test.
5361         * testsuite/25_algorithms/copy_n/istreambuf_iterator/2.cc: New test.
5362         * testsuite/25_algorithms/copy_n/istreambuf_iterator/deque.cc:
5363         New test.
5364
5365 2020-06-04  Jonathan Wakely  <jwakely@redhat.com>
5366
5367         * include/bits/ranges_algobase.h (__copy_n_fn): Only call
5368         ranges::copy for positive values.
5369         * include/bits/stl_algo.h (copy_n): Convert Size argument to an
5370         integral type and only call __copy_n for positive values.
5371         * testsuite/util/testsuite_iterators.h
5372         (random_access_iterator_wrapper::operator+=): Fix range check for
5373         negative values.
5374         (output_container, input_container, forward_container)
5375         (bidirectional_container, random_access_container): New alias
5376         templates.
5377         * testsuite/25_algorithms/copy_n/5.cc: New test.
5378
5379 2020-06-02  Jonathan Wakely  <jwakely@redhat.com>
5380
5381         PR libstdc++/90102
5382         * include/debug/deque (deque(const _Base&)): Replace parameter
5383         with a struct that wraps a const _Base&.
5384         * include/debug/forward_list (forward_list(_Base_ref)): New
5385         constructor.
5386         * include/debug/list (list(const _Base&)): Replace parameter
5387         with a struct that wraps a const _Base&.
5388         * include/debug/map.h (map(const _Base&)): Likewise.
5389         * include/debug/multimap.h (multimap(const _Base&)): Likewise.
5390         * include/debug/multiset.h (multiset(const _Base&)): Likewise.
5391         * include/debug/set.h (set(const _Base&)): Likewise.
5392         * include/debug/unordered_map (unordered_map(const _Base&))
5393         (unordered_multimap(const _Base&)): Likewise.
5394         * include/debug/unordered_set (unordered_set(const _Base&))
5395         (unordered_multiset(const _Base&)): Likewise.
5396         * testsuite/23_containers/vector/cons/destructible_debug_neg.cc:
5397         Adjust dg-error line number.
5398         * include/debug/vector (vector(const _Base&)): Likewise.
5399         * testsuite/23_containers/deque/debug/90102.cc: New test.
5400         * testsuite/23_containers/forward_list/debug/90102.cc: New test.
5401         * testsuite/23_containers/list/debug/90102.cc: New test.
5402         * testsuite/23_containers/map/debug/90102.cc: New test.
5403         * testsuite/23_containers/multimap/debug/90102.cc: New test.
5404         * testsuite/23_containers/multiset/debug/90102.cc: New test.
5405         * testsuite/23_containers/set/debug/90102.cc: New test.
5406         * testsuite/23_containers/unordered_map/debug/90102.cc: New test.
5407         * testsuite/23_containers/unordered_multimap/debug/90102.cc: New test.
5408         * testsuite/23_containers/unordered_multiset/debug/90102.cc: New test.
5409         * testsuite/23_containers/unordered_set/debug/90102.cc: New test.
5410         * testsuite/23_containers/vector/debug/90102.cc: New test.
5411
5412 2020-06-01  Jonathan Wakely  <jwakely@redhat.com>
5413
5414         PR libstdc++/95392
5415         * include/bits/fs_path.h (path::_S_to_string): Move to
5416         namespace-scope and rename to ...
5417         (__detail::__string_from_range): ... this.
5418         [WINDOWS] (__detail::__wstr_from_utf8): New function template to
5419         convert a char sequence containing UTF-8 to wstring.
5420         (path::_S_convert(Iter, Iter)): Adjust call to _S_to_string.
5421         (path::_S_convert_loc(Iter, Iter, const locale&)): Likewise.
5422         (u8path(InputIterator, InputIterator)) [WINDOWS]: Use
5423         __string_from_range to obtain a contiguous range and
5424         __wstr_from_utf8 to obtain a wide string.
5425         (u8path(const Source&)) [WINDOWS]: Use __effective_range to
5426         obtain a contiguous range and __wstr_from_utf8 to obtain a wide
5427         string.
5428         (path::_S_convert(const _EcharT*, const _EcharT)) [WINDOWS]:
5429         Use __wstr_from_utf8.
5430
5431 2020-06-01  Jonathan Wakely  <jwakely@redhat.com>
5432
5433         * testsuite/util/testsuite_iterators.h:
5434         (input_iterator_wrapper::operator++(int)): Return proxy object.
5435
5436 2020-06-01  Jonathan Wakely  <jwakely@redhat.com>
5437
5438         * doc/xml/manual/evolution.xml: Document deprecation of
5439         __is_nullptr_t and removal of std::allocator members.
5440         * doc/html/manual/api.html: Regenerate.
5441
5442 2020-06-01  Jonathan Wakely  <jwakely@redhat.com>
5443
5444         * doc/xml/manual/containers.xml: Replace <xref> with <link>.
5445         * doc/xml/manual/evolution.xml: Likewise.
5446         * doc/html/manual/api.html: Regenerate.
5447         * doc/html/manual/containers.html: Regenerate.
5448
5449 2020-06-01  Gerald Pfeifer  <gerald@pfeifer.com>
5450
5451         * doc/xml/faq.xml: Adjust Valgrind reference and remove another.
5452         * doc/html/faq.html: Regenerate.
5453
5454 2020-06-01  Gerald Pfeifer  <gerald@pfeifer.com>
5455
5456         * doc/xml/manual/policy_data_structures_biblio.xml: Remove
5457         stray change.
5458
5459 2020-06-01  Gerald Pfeifer  <gerald@pfeifer.com>
5460
5461         * doc/xml/manual/policy_data_structures_biblio.xml: Switch
5462         www.cs.princeton.edu to https.
5463         * doc/html/manual/policy_data_structures.html: Regenerate.
5464
5465 2020-05-31  Douglas B Rupp  <douglas.b.rupp@gmail.com>
5466
5467         * crossconfig.m4 (<*-vxworks>): Check for more math decls.
5468         * configure: Rebuild.
5469
5470 2020-05-29  H.J. Lu  <hjl.tools@gmail.com>
5471
5472         PR bootstrap/95413
5473         * configure: Regenerated.
5474
5475 2020-05-29  François Dumont  <fdumont@gcc.gnu.org>
5476
5477         PR libstdc++/95079
5478         * include/bits/hashtable_policy.h (_Insert_base<>::try_emplace): New.
5479         * include/bits/unordered_map.h (unordered_map<>::try_emplace): Adapt.
5480         (unordered_map<>::insert_or_assign): Adapt.
5481
5482 2020-05-27  Jonathan Wakely  <jwakely@redhat.com>
5483
5484         PR libstdc++/95282
5485         * include/bits/atomic_base.h (__atomic_impl::load): Add
5486         cv-qualifiers to parameter so that _Tp is deduced as the
5487         unqualified type.
5488         * testsuite/29_atomics/atomic_float/95282.cc: New test.
5489
5490 2020-05-27  Jonathan Wakely  <jwakely@redhat.com>
5491
5492         PR libstdc++/95322
5493         * include/std/ranges (transform_view::_Sentinel): Allow hidden
5494         friends to work with _Iterator<true> and _Iterator<false>.
5495         (join_view::_Sentinel): Likewise.
5496         * testsuite/std/ranges/adaptors/95322.cc: New test.
5497
5498 2020-05-27  Jonathan Wakely  <jwakely@redhat.com>
5499
5500         PR libstdc++/94354
5501         * include/bits/stl_iterator.h (reverse_iterator): Fix comparison
5502         operators to use the correct operations on the underlying
5503         iterators.
5504         * testsuite/24_iterators/reverse_iterator/rel_ops.cc: New test.
5505
5506 2020-05-27  Jonathan Wakely  <jwakely@redhat.com>
5507
5508         * testsuite/18_support/comparisons/categories/zero_neg.cc: New test.
5509
5510 2020-05-26  Patrick Palka  <ppalka@redhat.com>
5511
5512         PR libstdc++/95322
5513         * include/bits/stl_iterator.h (__detail::_Common_iter_proxy):
5514         Remove and instead define it ...
5515         (common_iterator::_Proxy): ... here.
5516         (common_iterator::operator->): Use it.
5517         * testsuite/24_iterators/common_iterator/2.cc: New test.
5518         * testsuite/std/ranges/adaptors/95322.cc: New test.
5519
5520 2020-05-23  Patrick Palka  <ppalka@redhat.com>
5521
5522         PR libstdc++/93978
5523         * testsuite/std/ranges/adaptors/93978.cc: Add -Wall to
5524         dg-additional-options.  Avoid unused-but-set-variable warning.
5525
5526 2020-05-23  Jonathan Wakely  <jwakely@redhat.com>
5527
5528         PR libstdc++/95289
5529         * include/debug/helper_functions.h (__get_distance): Only declare
5530         as a constexpr function for C++14 and up.
5531         * testsuite/25_algorithms/copy/debug/95289.cc: New test.
5532
5533         * include/bits/fs_path.h (__detail::_S_range_begin)
5534         (__detail::_S_range_end, path::_S_string_from_iter): Replace with
5535         overloaded function template __detail::__effective_range.
5536         (__detail::__effective_range): New overloaded function template to
5537         create a basic_string or basic_string_view for an effective range.
5538         (__detail::__value_type_is_char): Use __detail::__effective_range.
5539         Do not use remove_const on value type.
5540         (__detail::__value_type_is_char_or_char8_t): Likewise.
5541         (path::path(const Source&, format))
5542         (path::path(const Source&, const locale&))
5543         (path::operator/=(const Source&), path::append(const Source&))
5544         (path::concat(const Source&)): Use __detail::__effective_range.
5545         (path::_S_to_string(InputIterator, InputIterator)): New function
5546         template to create a string view if possible, or string otherwise.
5547         (path::_S_convert): Add overloads that convert a string returned
5548         by __detail::__effective_range. Use if-constexpr to inline conversion
5549         logic from all overloads of _Cvt::_S_convert.
5550         (path::_S_convert_loc): Add overload that converts a string. Use
5551         _S_to_string to avoid allocation when possible.
5552         (path::_Cvt): Remove.
5553         (path::operator+=(CharT)): Remove indirection through path::concat.
5554         * include/experimental/bits/fs_path.h (path::_S_convert_loc): Add
5555         overload for non-const pointers, to avoid constructing a std::string.
5556         * src/c++17/fs_path.cc (path::_S_convert_loc): Replace conditional
5557         compilation with call to _S_convert.
5558
5559         * include/bits/fs_path.h (__detail::_S_range_begin)
5560         (__detail::_S_range_end): Remove unintentional static specifiers.
5561         * include/experimental/bits/fs_path.h (__detail::_S_range_begin)
5562         (__detail::_S_range_end): Likewise.
5563
5564         * include/bits/fs_path.h (filesystem::__detail::__is_encoded_char):
5565         Replace alias template with variable template. Don't remove const.
5566         (filesystem::__detail::__is_path_src): Replace overloaded function
5567         template with variable template and specializations.
5568         (filesystem::__detail::__is_path_iter_src): Replace alias template
5569         with class template.
5570         (filesystem::__detail::_Path): Use __is_path_src. Remove support for
5571         iterator pairs.
5572         (filesystem::__detail::_Path2): New alias template for checking
5573         InputIterator requirements.
5574         (filesystem::__detail::__constructible_from): Remove.
5575         (filesystem::path): Replace _Path<Iter, Iter> with _Path2<Iter>.
5576         * testsuite/27_io/filesystem/path/construct/80762.cc: Check with two
5577         constructor arguments of void and void* types.
5578
5579 2020-05-21  Matthias Kretz  <kretz@kde.org>
5580
5581         * testsuite/Makefile.am: Remove dup target_triplet and set tool,
5582         allowing runtest to work without arguments.
5583         * testsuite/Makefile.in: Regenerate.
5584
5585 2020-05-21  Jonathan Wakely  <jwakely@redhat.com>
5586
5587         PR libstdc++/93983
5588         * include/bits/iterator_concepts.h (__detail::__cpp17_iterator):
5589         Reorder constraints to avoid recursion when constructors use
5590         iterator_traits (LWG 3420).
5591         * testsuite/24_iterators/customization_points/lwg3420.cc: New test.
5592
5593         * include/experimental/socket (basic_socket::is_open()
5594         (basic_socket_acceptor::is_open()): Use _GLIBCXX_NODISCARD macro.
5595
5596         * include/experimental/bits/net.h (__endpoint, __protocol)
5597         (__acceptable_protocol, __inet_protocol): New concepts.
5598         (__detail::__is_endpoint): Move trait from <experimental/socket>.
5599         (__is_protocol, __is_acceptable_protocol, __is_inet_protocol): New
5600         traits.
5601         (__endpoint, __protocol, __acceptable_protocol): New variable
5602         templates.
5603         * include/experimental/socket (__is_endpoint): Move to net.h header.
5604         (basic_socket, basic_socket_acceptor): Check requirements.
5605
5606         * include/experimental/executor (use_future_t::use_future_t()): Fix
5607         incorrect noexcept-specifier.
5608         * include/experimental/internet (basic_resolver_results): Adjust
5609         whitespace.
5610         * include/experimental/socket (__basic_socket_impl::release): Add
5611         member function.
5612         (basic_socket(io_context&, const endpoint_type&)): Fix argument to
5613         target constructor.
5614         (basic_socket::release(), basic_socket::release(error_code&)): Add
5615         missing member functions.
5616         (basic_socket::is_open()): Add nodiscard attribute.
5617         (basic_socket::close(error_code&)): Pass argument to base function.
5618         (basic_socket_acceptor::release())
5619         (basic_socket_acceptor::release(error_code&)): Add missing member
5620         functions.
5621         (basic_socket_acceptor::is_open()): Add nodiscard attribute.
5622         (basic_socket_streambuf::error()): Add noexcept.
5623         (basic_socket_iostream::error()): Likewise.
5624         * testsuite/experimental/net/socket/basic_socket.cc: New test.
5625
5626         * include/experimental/buffer: Replace typedefs with
5627         alias-declarations.
5628         * include/experimental/executor: Likewise.
5629         * include/experimental/internet: Likewise.
5630         * include/experimental/socket: Likewise.
5631         * include/experimental/timer: Likewise.
5632
5633 2020-05-19  Jonathan Wakely  <jwakely@redhat.com>
5634
5635         PR libstdc++/94087
5636         * src/c++11/random.cc (__x86_rdseed): Allow fallback function to be
5637         passed in.
5638         (__x86_rdseed_rdrand): New function that uses rdseed with rdrand
5639         fallback.
5640         (random_device::_M_init): Use __x86_rdseed_rdrand when both
5641         instructions are available.
5642         * testsuite/26_numerics/random/random_device/94087.cc: New test.
5643
5644 2020-05-19  Patrick Palka  <ppalka@redhat.com>
5645
5646         PR c++/66439
5647         * testsuite/20_util/pair/astuple/get_neg.cc: Prune "type/value
5648         mismatch" messages.
5649         * testsuite/20_util/tuple/element_access/get_neg.cc: Likewise.
5650
5651 2020-05-15  H.J. Lu  <hongjiu.lu@intel.com>
5652
5653         PR bootstrap/95147
5654         * configure: Regenerated.
5655
5656 2020-05-14  H.J. Lu  <hongjiu.lu@intel.com>
5657
5658         * configure: Regenerated.
5659
5660 2020-05-13  Alexandre Oliva <oliva@adacore.com>
5661
5662         PR libstdc++/77691
5663         * include/experimental/memory_resource
5664         (__resource_adaptor_imp::do_allocate): Handle max_align_t on
5665         x86-vxworks as on x86-solaris.
5666         (__resource_adaptor_imp::do_deallocate): Likewise.
5667         * testsuite/experimental/memory_resource/new_delete_resource.cc:
5668         Drop xfail.
5669         (BAD_MAX_ALIGN_T): Define on x86-vxworks as on x86-solaris.
5670         (test03): Drop max-align test for char-aligned alloc.
5671
5672 2020-05-08  Ulrich Drepper  <drepper@redhat.com>
5673
5674         * include/bits/atomic_base.h (atomic_flag): Implement test member
5675         function.
5676         * include/std/version: Define __cpp_lib_atomic_flag_test.
5677         * testsuite/29_atomics/atomic_flag/test/explicit.cc: New file.
5678         * testsuite/29_atomics/atomic_flag/test/implicit.cc: New file.
5679
5680 2020-05-07  Jonathan Wakely  <jwakely@redhat.com>
5681
5682         PR libstdc++/94971 (partial)
5683         * include/bits/ranges_algo.h (ranges::__sample_fn): Qualify
5684         std::sample using macro to work in parallel mode.
5685         (__sort_fn): Likewise for std::sort.
5686         (ranges::__nth_element_fn): Likewise for std::nth_element.
5687         * include/bits/stl_algobase.h (lexicographical_compare_three_way):
5688         Likewise for std::__min_cmp.
5689         * include/parallel/algobase.h (lexicographical_compare_three_way):
5690         Add to namespace std::__parallel.
5691
5692         PR c/92472
5693         * include/parallel/multiway_merge.h (_GuardedIterator::operator*)
5694         (_GuardedIterator::operator _RAIter, _UnguardedIterator::operator*)
5695         (_UnguardedIterator::operator _RAIter): Add const qualifier.
5696         (operator<(_GuardedIterator&, _GuardedIterator&)
5697         (operator<=(_GuardedIterator&, _GuardedIterator&)
5698         (operator<(_UnguardedIterator&, _UnguardedIterator&)
5699         (operator<=(_UnguardedIterator&, _UnguardedIterator&): Change
5700         parameters to const references.
5701
5702 2020-05-07  Eric Botcazou  <ebotcazou@adacore.com>
5703
5704         * config/abi/post/sparc64-linux-gnu/baseline_symbols.txt: Update.
5705         * config/abi/post/sparc64-linux-gnu/32/baseline_symbols.txt: Likewise.
5706
5707 2020-05-06  François Dumont  <fdumont@gcc.gnu.org>
5708
5709         * include/bits/stl_algobase.h (struct _Bit_iterator): New declaration.
5710         (std::__fill_a1(_Bit_iterator, _Bit_iterator, const bool&)): Likewise.
5711         * include/bits/stl_bvector.h (__fill_bvector): Move outside
5712         _GLIBCXX_STD_C namespace.
5713         (fill(_Bit_iterator, _Bit_iterator, const bool&)): Likewise and rename
5714         into...
5715         (__fill_a1): ...this.
5716         * testsuite/25_algorithms/fill/bvector/1.cc: New.
5717
5718 2020-05-06  H.J. Lu  <hongjiu.lu@intel.com>
5719
5720         * config/abi/post/x86_64-linux-gnu/x32/baseline_symbols.txt: Updated.
5721
5722 2020-05-06  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
5723
5724         * config/abi/post/i386-solaris/baseline_symbols.txt: Regenerate.
5725         * config/abi/post/i386-solaris/amd64/baseline_symbols.txt:
5726         Likewise.
5727         * config/abi/post/sparc-solaris/baseline_symbols.txt: Likewise.
5728         * config/abi/post/sparc-solaris/sparcv9/baseline_symbols.txt:
5729         Likewise.
5730
5731 2020-05-06  Martin Liska  <mliska@suse.cz>
5732
5733         Revert:
5734         2020-05-05  Martin Liska  <mliska@suse.cz>
5735         PR c/92472
5736         * include/parallel/multiway_merge.h:
5737         Use const for _Compare template argument.
5738
5739 2020-05-06  Jonathan Wakely  <jwakely@redhat.com>
5740
5741         * doc/xml/manual/abi.xml (abi.versioning.history): Document library
5742         versions for GCC 9.[123] and 10.1 releases.
5743         * doc/html/*: Regenerate.
5744
5745 2020-05-06  Jakub Jelinek  <jakub@redhat.com>
5746
5747         * config/abi/post/x86_64-linux-gnu/baseline_symbols.txt: Update.
5748         * config/abi/post/x86_64-linux-gnu/32/baseline_symbols.txt: Update.
5749         * config/abi/post/i386-linux-gnu/baseline_symbols.txt: Update.
5750         * config/abi/post/i486-linux-gnu/baseline_symbols.txt: Update.
5751         * config/abi/post/aarch64-linux-gnu/baseline_symbols.txt: Update.
5752         * config/abi/post/s390x-linux-gnu/baseline_symbols.txt: Update.
5753         * config/abi/post/powerpc64-linux-gnu/baseline_symbols.txt: Update.
5754
5755 2020-05-05  Martin Liska  <mliska@suse.cz>
5756
5757         PR c/92472
5758         * include/parallel/multiway_merge.h:
5759         Use const for _Compare template argument.
5760
5761 2020-05-04  Fangrui Song  <maskray@google.com>
5762
5763         * libsupc++/cxxabi.h (__cxa_finalize): Fix return type.
5764
5765 2020-05-04  Jonathan Wakely  <jwakely@redhat.com>
5766
5767         * doc/xml/faq.xml: Use working link for SGI STL FAQ.
5768         * doc/html/*: Regenerate.
5769
5770         PR libstdc++/94906
5771         * src/c++17/memory_resource.cc
5772         (monotonic_buffer_resource::_Chunk::release): Use size_t for shift
5773         operands.
5774
5775 2020-05-04  Nathan Sidwell  <nathan@acm.org>
5776
5777         PR libstdc++/94747
5778         * libsupc++/dyncast.cc (__dynamic_cast): Cast offsetof to
5779         ptrdiff_t before negation, to show intent more clearly.
5780
5781 2020-05-04  Jonathan Wakely  <jwakely@redhat.com>
5782
5783         PR libstdc++/94936
5784         * src/c++17/memory_resource.cc (synchronized_pool_resource::_TPools):
5785         Add comment about single-threaded behaviour.
5786         (synchronized_pool_resource::_TPools::move_nonempty_chunks()): Hoist
5787         class member access out of loop.
5788         (synchronized_pool_resource::synchronized_pool_resource())
5789         (synchronized_pool_resource::~synchronized_pool_resource())
5790         (synchronized_pool_resource::release()): Check __gthread_active_p
5791         before creating and/or deleting the thread-specific data key.
5792         (synchronized_pool_resource::_M_thread_specific_pools()): Adjust
5793         assertions.
5794         (synchronized_pool_resource::do_allocate(size_t, size_t)): Add fast
5795         path for single-threaded case.
5796         (synchronized_pool_resource::do_deallocate(void*, size_t, size_t)):
5797         Likewise. Return if unable to find a pool that owns the allocation.
5798         * testsuite/20_util/synchronized_pool_resource/allocate_single.cc:
5799         New test.
5800         * testsuite/20_util/synchronized_pool_resource/cons_single.cc: New
5801         test.
5802         * testsuite/20_util/synchronized_pool_resource/release_single.cc: New
5803         test.
5804
5805 2020-05-03  Jonathan Wakely  <jwakely@redhat.com>
5806
5807         PR libstdc++/94933
5808         * include/bits/stl_algobase.h (__fill_a1): Make overload for byte types
5809         usable in constant expressions.
5810         * testsuite/25_algorithms/fill_n/constexpr.cc: Test with bytes and
5811         non-scalars.
5812
5813 2020-05-01  Jonathan Wakely  <jwakely@redhat.com>
5814
5815         PR libstdc++/94901
5816         * testsuite/17_intro/badnames.cc: Test values between _E9 and _E24 too.
5817
5818 2020-05-01  Jonathan Wakely  <jwakely@redhat.com>
5819             Patrick Palka  <ppalka@redhat.com>
5820
5821         PR libstdc++/92894
5822         * include/bits/iterator_concepts.h (ranges::__cust_imove::_IMove):
5823         Add trait to determine return type and an alias for it.
5824         (ranges::__cust_imove::_IMove::operator()): Use __result instead of
5825         deduced return type.
5826         (iter_rvalue_reference_t): Use _IMove::__type instead of checking
5827         the result of ranges::iter_move.
5828         (__detail::__indirectly_readable_impl): Use iter_rvalue_reference_t
5829         instead of checking the result of ranges::iter_move.
5830         * testsuite/24_iterators/customization_points/92894.cc: New test.
5831         * testsuite/24_iterators/indirect_callable/92894.cc: New test.
5832
5833 2020-05-01  Jonathan Wakely  <jwakely@redhat.com>
5834
5835         PR libstdc++/94901
5836         * include/std/type_traits (__is_complete_or_unbounded): Replace
5837         BADNAME _T with _Tp.
5838         * testsuite/17_intro/badnames.cc: New test.
5839
5840 2020-04-30  Jonathan Wakely  <jwakely@redhat.com>
5841
5842         PR libstdc++/89510
5843         * include/bits/alloc_traits.h (allocator_traits::_S_construct)
5844         (allocator_traits::_S_destroy)
5845         (allocator_traits<allocator<T>>::construct): Use traits in
5846         noexcept-specifiers.
5847         * include/bits/allocator.h (allocator<void>::construct)
5848         (allocator<void>::destroy): Likewise.
5849         * include/ext/malloc_allocator.h (malloc_allocator::construct)
5850         (malloc_allocator::destroy): Likewise.
5851         * include/ext/new_allocator.h (new_allocator::construct)
5852         (new_allocator::destroy): Likewise.
5853         * testsuite/20_util/allocator/89510.cc: New test.
5854         * testsuite/ext/malloc_allocator/89510.cc: New test.
5855         * testsuite/ext/new_allocator/89510.cc: New test.
5856
5857 2020-04-29  Jonathan Wakely  <jwakely@redhat.com>
5858
5859         PR libstdc++/94854
5860         * include/bits/basic_string.tcc: Update comment about explicit
5861         instantiations.
5862
5863 2020-04-28  Jonathan Wakely  <jwakely@redhat.com>
5864
5865         PR libstdc++/91480
5866         * include/bits/allocator.h (__cpp_lib_allocator_is_always_equal):
5867         Remove non-standard macro.
5868         * include/bits/stl_iterator.h (__cpp_lib_constexpr_iterator): Define
5869         to indicate P1032R1 support.
5870         * include/bits/stl_pair.h (__cpp_lib_constexpr_utility): Likewise.
5871         * include/std/string_view (__cpp_lib_constexpr_string_view): Likewise.
5872         * include/std/tuple (__cpp_lib_constexpr_tuple): Likewise.
5873         * include/std/version (__cpp_lib_allocator_is_always_equal): Remove.
5874         (__cpp_lib_constexpr_iterator, __cpp_lib_constexpr_string_view)
5875         (__cpp_lib_constexpr_tuple, __cpp_lib_constexpr_utility): Define.
5876         * testsuite/20_util/function_objects/constexpr_searcher.cc: Check
5877         feature test macro.
5878         * testsuite/20_util/tuple/cons/constexpr_allocator_arg_t.cc: Likewise.
5879         * testsuite/21_strings/basic_string_view/operations/copy/char/
5880         constexpr.cc: Likewise.
5881         * testsuite/24_iterators/insert_iterator/constexpr.cc: Likewise.
5882
5883         PR libstdc++/94831
5884         * include/bits/alloc_traits.h (_S_construct): Restore placement
5885         new-expression for C++11/14/17 and call std::construct_at directly
5886         for C++20.
5887         * include/bits/stl_construct.h (_Construct): Revert to non-constexpr
5888         function returning void.
5889         * testsuite/20_util/specialized_algorithms/
5890         uninitialized_value_construct/94831.cc: New test.
5891         * testsuite/23_containers/vector/cons/94831.cc: New test.
5892
5893 2020-04-28  Patrick Palka  <ppalka@redhat.com>
5894
5895         LWG 3433 subrange::advance(n) has UB when n < 0
5896         * include/std/ranges (subrange::prev): Fix typo.
5897         (subrange::advance): Handle a negative argument as per the proposed
5898         resolution of LWG 3433.
5899         * testsuite/std/ranges/subrange/lwg3433.cc: New test.
5900
5901 2020-04-28  Jonathan Wakely  <jwakely@redhat.com>
5902             Iain Sandoe  <iain@sandoe.co.uk>
5903
5904         PR c++/94759
5905         * include/std/coroutine: Implement handing for non-
5906         class coroutine return types.
5907
5908 2020-04-24  Jonathan Wakely  <jwakely@redhat.com>
5909
5910         * include/experimental/executor (service_already_exists): Make default
5911         constructor public (LWG 3414).
5912         * testsuite/experimental/net/execution_context/make_service.cc: Check
5913         the service_already_exists can be default constructed.
5914
5915 2020-04-24  Kamlesh Kumar  <kamleshbhalui@gmail.com>
5916             Jonathan Wakely  <jwakely@redhat.com>
5917
5918         PR libstdc++/90415
5919         PR libstdc++/92156
5920         * include/std/any (any): Rename template parameters for consistency
5921         with the standard.
5922         (any::_Decay): Rename to _Decay_if_not_any.
5923         (any::any(T&&):: Remove is_constructible from constraints. Remove
5924         non-standard overload.
5925         (any::any(in_place_type_t<T>, Args&&...))
5926         (any::any(in_place_type_t<T>, initializer_list<U>, Args&&...))
5927         (any::emplace(Args&&...))
5928         (any::emplace(initializer_list<U>, Args&&...)):
5929         Use decay_t instead of _Decay.
5930         * testsuite/20_util/any/cons/90415.cc: New test.
5931         * testsuite/20_util/any/cons/92156.cc: New Test.
5932         * testsuite/20_util/any/misc/any_cast_neg.cc: Make dg-error directives
5933         more robust.
5934         * testsuite/20_util/any/modifiers/92156.cc: New test.
5935
5936 2020-04-23  Jonathan Wakely  <jwakely@redhat.com>
5937
5938         * doc/xml/manual/status_cxx2020.xml: Update C++20 status table.
5939         * doc/html/*: Regenerate.
5940
5941         * include/bits/stl_iterator.h (__cpp_lib_array_constexpr): Revert
5942         value for C++17 to 201803L because P0858R0 is supported for C++17.
5943         * include/std/version (__cpp_lib_array_constexpr): Likewise.
5944         * testsuite/23_containers/array/element_access/constexpr_c++17.cc:
5945         Check for value corresponding to P0031R0 features being tested.
5946         * testsuite/23_containers/array/requirements/constexpr_iter.cc:
5947         Check for value corresponding to P0858R0 features being tested.
5948
5949         * include/std/version (__cpp_lib_three_way_comparison): Define for
5950         freestanding builds.
5951
5952 2020-04-23  Thomas Rodgers  <rodgert@appliantology.com>
5953
5954         * include/experimental/net/executor (system_context): Mark
5955         system_context::system_context() = delete.
5956         * testsuite/experimental/net/executor/1.cc: Add new
5957         test to check system_context is not default constructible.
5958
5959 2020-04-23  Iain Sandoe  <iain@sandoe.co.uk>
5960
5961         * include/std/coroutine: Update the inline namespace to __n4861.
5962         Add the __cpp_lib_coroutine define, set to 201902L.
5963         * include/std/version: Add __cpp_lib_coroutine, set to 201902L.
5964
5965 2020-04-22  Jonathan Wakely  <jwakely@redhat.com>
5966
5967         * include/std/execution (__cpp_lib_execution): Define to indicate
5968         support for P0024R2 and P1001R2.
5969         * include/std/version (__cpp_lib_execution): Define.
5970         * testsuite/25_algorithms/pstl/feature_test.cc: Only test macro
5971         defined by <algorithm>, move other tests to new tests ...
5972         * testsuite/25_algorithms/pstl/feature_test-2.cc: New test.
5973         * testsuite/25_algorithms/pstl/feature_test-3.cc: New test.
5974         * testsuite/25_algorithms/pstl/feature_test-4.cc: New test.
5975         * testsuite/25_algorithms/pstl/feature_test-5.cc: New test.
5976
5977         * include/bits/stl_iterator.h (__cpp_lib_array_constexpr): Define
5978         different values for C++17 and C++20, to indicate different feature
5979         sets. Update value for C++20 to indicate P1032R1 support.
5980         * include/std/version (__cpp_lib_array_constexpr): Likewise.
5981         * testsuite/23_containers/array/comparison_operators/constexpr.cc:
5982         Check feature test macro.
5983         * testsuite/23_containers/array/element_access/constexpr_c++17.cc:
5984         New test.
5985         * testsuite/23_containers/array/requirements/constexpr_fill.cc: Check
5986         feature test macro.
5987         * testsuite/23_containers/array/requirements/constexpr_iter.cc: Test
5988         in C++17 mode and check feature test macro.
5989
5990         * include/std/utility (__cpp_lib_constexpr_algorithms): Do not define
5991         here.
5992         * testsuite/20_util/exchange/constexpr.cc: Do not expect macro to be
5993         defined by <utility>.
5994
5995         * include/std/functional (__cpp_lib_concepts): Update macro value to
5996         indicate P1964R2 support.
5997         * include/std/version (__cpp_lib_concepts): Likewise.
5998         * testsuite/std/concepts/1.cc: Adjust expected value.
5999         * testsuite/std/concepts/2.cc: Likewise.
6000
6001         * include/std/functional (__cpp_lib_constexpr_invoke): Rename to
6002         __cpp_lib_constexpr_functional.
6003         * include/std/version (__cpp_lib_constexpr_invoke): Likewise.
6004         * testsuite/20_util/function_objects/invoke/constexpr.cc: Adjust.
6005
6006         * include/bits/ptr_traits.h (__cpp_lib_constexpr_memory): Define to
6007         indicate P1006R1 support.
6008         (__cpp_lib_to_address): Define to indicate P0653R2 support.
6009         * include/bits/range_access.h (__cpp_lib_ssize): Define to indicate
6010         P1227R2 support.
6011         * include/bits/ranges_algo.h (__cpp_lib_shift): Define to indicate
6012         P0769R2 support.
6013         * include/std/atomic (__cpp_lib_atomic_float): Define to indicate
6014         P0020R6 support.
6015         * include/std/memory (__cpp_lib_assume_aligned): Define to indicate
6016         P1007R3 support.
6017         * include/std/memory_resource (__cpp_lib_polymorphic_allocator):
6018         Define to indicate P0339R6 support.
6019         * include/std/string_view (__cpp_lib_starts_ends_with): Define to
6020         indicate P0457R2 support.
6021         * include/std/type_traits (__cpp_lib_is_nothrow_convertible): Define
6022         to indicate P0758R1 support.
6023         (__cpp_lib_remove_cvref): Define to indicate P0550R2 support.
6024         (__cpp_lib_type_identity): Define to indicate P0887R1 support.
6025         * include/std/version (__cpp_lib_atomic_float)
6026         (__cpp_lib_is_nothrow_convertible, __cpp_lib_remove_cvref)
6027         (__cpp_lib_type_identity, __cpp_lib_assume_aligned)
6028         (__cpp_lib_constexpr_memory, __cpp_lib_polymorphic_allocator)
6029         (__cpp_lib_shift, __cpp_lib_ssize, __cpp_lib_starts_ends_with)
6030         (__cpp_lib_to_address): Define.
6031         * testsuite/20_util/to_address/1_neg.cc: Adjust dg-error line number.
6032
6033         * include/bits/stl_map.h (__cpp_lib_map_insertion): Remove old
6034         macro.
6035         * include/bits/unordered_map.h (__cpp_lib_unordered_map_insertion):
6036         Likewise.
6037         * include/std/version (__cpp_lib_map_insertion)
6038         (__cpp_lib_unordered_map_insertion): Remove.
6039
6040         * include/std/condition_variable (__cpp_lib_jthread): Remove
6041         redundant definition.
6042         * include/std/stop_token (__cpp_lib_jthread): Update macro value to
6043         indicate P1869R1 support.
6044         * include/std/version (__cpp_lib_jthread): Update value.
6045         * testsuite/30_threads/condition_variable_any/stop_token/1.cc: Check
6046         for updated macro value.
6047         * testsuite/30_threads/condition_variable_any/stop_token/2.cc:
6048         Likewise.
6049         * testsuite/30_threads/jthread/1.cc: Likewise.
6050         * testsuite/30_threads/jthread/2.cc: Likewise.
6051         * testsuite/30_threads/stop_token/1.cc: Likewise.
6052         * testsuite/30_threads/stop_token/2.cc: Likewise.
6053
6054         * testsuite/21_strings/basic_string/erasure.cc: Check for
6055         __cpp_lib_erase_if macro.
6056         * testsuite/23_containers/deque/erasure.cc: Add header name to #error
6057         messages.
6058         * testsuite/23_containers/forward_list/erasure.cc: Likewise.
6059         * testsuite/23_containers/list/erasure.cc: Likewise.
6060         * testsuite/23_containers/map/erasure.cc: Likewise.
6061         * testsuite/23_containers/set/erasure.cc: Likewise.
6062         * testsuite/23_containers/unordered_map/erasure.cc: Likewise.
6063         * testsuite/23_containers/unordered_set/erasure.cc: Likewise.
6064         * testsuite/23_containers/vector/erasure.cc: Likewise.
6065
6066 2020-04-21  Jonathan Wakely  <jwakely@redhat.com>
6067
6068         * include/bits/stl_iterator.h (__normal_iterator): Use synth-three-way
6069         to define operator<=>.
6070         * testsuite/24_iterators/normal_iterator/cmp_c++20.cc: New test.
6071
6072         * doc/Makefile.am (xml_sources_manual): Add missing XML files.
6073         * doc/Makefile.in: Regenerate.
6074         * doc/xml/manual/status_cxx1998.xml: Refer to "this section" instead
6075         of "this page".
6076         * doc/xml/manual/status_cxx2011.xml: Formatting and other corrections
6077         to the C++11 status table.
6078         * doc/xml/manual/status_cxx2014.xml: Replace list of C++14 feature
6079         proposals with table matching contents of the C++14 standard.
6080         * doc/xml/manual/status_cxx2017.xml: Add table matching contents of
6081         the C++17 standard.
6082         * doc/html/*: Regenerate.
6083
6084         PR c++/94149
6085         * include/std/type_traits (__is_nt_constructible_impl): Add partial
6086         specializations for bounded arrays with non-empty initializers.
6087         * testsuite/20_util/is_nothrow_constructible/value_c++20.cc: New test.
6088
6089 2020-04-20  Thomas Rodgers  <trodgers@redhat.com>
6090
6091         * testsuite/lib/libstdc++.exp: Add additional_flags=
6092         -DTBB_SUPRESS_DEPRECATED_MESSAGES=1 to suppress warnings when
6093         compiling with a newer Thread Building Blocks.
6094
6095 2020-04-20  Jonathan Wakely  <jwakely@redhat.com>
6096
6097         * testsuite/24_iterators/istreambuf_iterator/sentinel.cc: New test.
6098
6099         * testsuite/20_util/is_constructible/51185.cc: Make test class a
6100         non-aggregate so that the test verifies the same thing in all -std
6101         modes.
6102         * testsuite/20_util/is_constructible/value-2.cc: Adjust expected
6103         results for some types when paren-init for aggregates is supported.
6104
6105         * include/std/version (__cpp_lib_three_way_comparison): Update value.
6106         * libsupc++/compare (__cpp_lib_three_way_comparison): Likewise.
6107         (__detail::__synth3way): Add noexcept-specifier.
6108
6109         * include/bits/stl_map.h (map): Define operator<=> and remove
6110         operator< for C++20.
6111         * include/bits/stl_multimap.h (multimap): Likewise.
6112         * include/bits/stl_multiset.h (multiset): Likewise.
6113         * include/bits/stl_set.h (set): Likewise.
6114         * include/bits/stl_tree.h (_Rb_tree): Likewise.
6115         (_Rb_tree_iterator, _Rb_tree_const_iterator): Remove redundant
6116         operator!= for C++20.
6117         * include/debug/map.h (__gnu_debug::map): Define operator<=> for C++20.
6118         * include/debug/multimap.h (__gnu_debug::multimap): Likewise.
6119         * include/debug/multiset.h (__gnu_debug::multiset): Likewise.
6120         * include/debug/set.h (__gnu_debug::set): Likewise.
6121         * testsuite/23_containers/map/operators/cmp_c++20.cc: New test.
6122         * testsuite/23_containers/multimap/operators/cmp_c++20.cc: New test.
6123         * testsuite/23_containers/multiset/operators/cmp_c++20.cc: New test.
6124         * testsuite/23_containers/set/operators/cmp_c++20.cc: New test.
6125
6126 2020-04-20  Matthias Kretz  <kretz@kde.org>
6127
6128         * testsuite/lib/libstdc++.exp: Avoid illegal argument to verbose.
6129
6130 2020-04-19  Jonathan Wakely  <jwakely@redhat.com>
6131
6132         * include/bits/stl_queue.h (queue): Define operator<=> for C++20.
6133         * include/bits/stl_stack.h (stack): Likewise.
6134         * testsuite/23_containers/queue/cmp_c++20.cc: New test.
6135         * testsuite/23_containers/stack/cmp_c++20.cc: New test.
6136
6137         * include/bits/unordered_map.h (unordered_map, unordered_multimap):
6138         Remove redundant operator!= for C++20.
6139         * include/bits/unordered_set.h (unordered_set, unordered_multiset):
6140         Likewise.
6141         * include/debug/unordered_map (unordered_map, unordered_multimap):
6142         Likewise.
6143         * include/debug/unordered_set (unordered_set, unordered_multiset):
6144         Likewise.
6145
6146         PR other/94629
6147         * include/debug/formatter.h (_Error_formatter::_Parameter): Fix
6148         redundant assignment in constructor.
6149
6150 2020-04-18  Jonathan Wakely  <jwakely@redhat.com>
6151
6152         * include/std/chrono (duration, time_point): Define operator<=> and
6153         remove redundant operator!= for C++20.
6154         * testsuite/20_util/duration/comparison_operators/three_way.cc: New
6155         test.
6156         * testsuite/20_util/time_point/comparison_operators/three_way.cc: New
6157         test.
6158
6159         * testsuite/util/native_type/native_priority_queue.hpp: Use
6160         allocator_traits to rebind allocator.
6161
6162 2020-04-17  Jonathan Wakely  <jwakely@redhat.com>
6163
6164         * include/bits/forward_list.h (forward_list): Define operator<=> and
6165         remove redundant comparison operators for C++20.
6166         * include/bits/stl_bvector.h (vector<bool, Alloc>): Likewise.
6167         * include/bits/stl_deque.h (deque): Likewise.
6168         * include/bits/stl_iterator.h (__normal_iterator): Likewise.
6169         * include/bits/stl_list.h (list): Likewise.
6170         * include/bits/stl_vector.h (vector): Likewise.
6171         * include/debug/deque (__gnu_debug::deque): Likewise.
6172         * include/debug/forward_list (__gnu_debug::forward_list): Likewise.
6173         * include/debug/list (__gnu_debug::list): Likewise.
6174         * include/debug/safe_iterator.h (__gnu_debug::_Safe_iterator):
6175         Likewise.
6176         * include/debug/vector (__gnu_debug::vector): Likewise.
6177         * include/ext/pointer.h (__gnu_cxx::_Pointer_adapter): Define
6178         operator<=> for C++20.
6179         * testsuite/23_containers/deque/operators/cmp_c++20.cc: New test.
6180         * testsuite/23_containers/forward_list/cmp_c++20.cc: New test.
6181         * testsuite/23_containers/list/cmp_c++20.cc: New test.
6182         * testsuite/23_containers/vector/bool/cmp_c++20.cc: New test.
6183         * testsuite/23_containers/vector/cmp_c++20.cc: New test.
6184
6185         * include/bits/basic_string.h (basic_string): Define operator<=> and
6186         remove redundant comparison operators for C++20.
6187         * include/bits/char_traits.h (__gnu_cxx::char_traits, char_traits):
6188         Add comparison_category members.
6189         (__detail::__char_traits_cmp_cat): New helper to get comparison
6190         category from char traits class.
6191         * include/bits/regex.h (regex_traits::_RegexMask::operator!=): Do not
6192         define for C++20.
6193         (sub_match): Define operator<=> and remove redundant comparison
6194         operators for C++20.
6195         (match_results): Remove redundant operator!= for C++20.
6196         * include/std/string_view (basic_string_view): Define operator<=> and
6197         remove redundant comparison operators for C++20.
6198         * testsuite/21_strings/basic_string/operators/char/cmp_c++20.cc: New
6199         test.
6200         * testsuite/21_strings/basic_string/operators/wchar_t/cmp_c++20.cc:
6201         New test.
6202         * testsuite/21_strings/basic_string_view/operations/copy/char/
6203         constexpr.cc: Initialize variable.
6204         * testsuite/21_strings/basic_string_view/operations/copy/wchar_t/
6205         constexpr.cc: Likewise.
6206         * testsuite/21_strings/basic_string_view/operators/char/2.cc: Add
6207         dg-do directive and remove comments showing incorrect signatures.
6208         * testsuite/21_strings/basic_string_view/operators/wchar_t/2.cc:
6209         Likewise.
6210         * testsuite/21_strings/basic_string_view/operators/char/cmp_c++20.cc:
6211         New test.
6212         * testsuite/21_strings/basic_string_view/operators/wchar_t/cmp_c++20.cc:
6213         New test.
6214         * testsuite/28_regex/sub_match/compare_c++20.cc: New test.
6215
6216 2020-04-16  Jonathan Wakely  <jwakely@redhat.com>
6217
6218         * testsuite/20_util/unsynchronized_pool_resource/allocate.cc: Remove
6219         name of unused parameter.
6220
6221 2020-04-15  Jonathan Wakely  <jwakely@redhat.com>
6222
6223         * include/bits/fs_dir.h (file_status): Define operator== for C++20.
6224         (directory_entry): Define operator<=> and remove redundant comparison
6225         operators for C++20.
6226         * include/bits/fs_fwd.h (space_info): Define operator== for C++20.
6227         * include/bits/fs_path.h (path): Define operator<=> and remove
6228         redundant comparison operators for C++20.
6229         * testsuite/27_io/filesystem/path/compare/compare.cc: Fix comment.
6230         * testsuite/27_io/filesystem/path/compare/lwg2936.cc: Likewise.
6231         * testsuite/27_io/filesystem/path/compare/path.cc: Likewise.
6232         * testsuite/27_io/filesystem/path/compare/strings.cc: Likewise.
6233
6234         * include/bits/allocator.h (operator!=): Do not define for C++20.
6235         * include/bits/locale_classes.h (operator!=): Likewise.
6236         * include/bits/std_function.h (operator==(nullptr_t, const function&))
6237         (operator!=(const function&, nullptr_t))
6238         (operator!=(nullptr_t, const function&)): Likewise.
6239         * include/ext/bitmap_allocator.h (operator!=): Likewise.
6240         * include/ext/debug_allocator.h (operator!=): Likewise.
6241         * include/ext/extptr_allocator.h (operator!=): Likewise.
6242         * include/ext/malloc_allocator.h (operator!=): Likewise.
6243         * include/ext/mt_allocator.h (operator!=): Likewise.
6244         * include/ext/new_allocator.h (operator!=): Likewise.
6245         * include/ext/pool_allocator.h (operator!=): Likewise.
6246         * include/ext/throw_allocator.h (operator!=): Likewise.
6247         * include/std/bitset (bitset::operator!=): Likewise.
6248         * include/std/memory_resource (operator!=): Likewise.
6249         * include/std/scoped_allocator (operator!=): Likewise.
6250
6251         * include/std/typeindex (operator<=>): Define for C++20.
6252         * testsuite/20_util/typeindex/comparison_operators_c++20.cc: New test.
6253
6254 2020-04-14  Jonathan Wakely  <jwakely@redhat.com>
6255
6256         * libsupc++/compare (compare_three_way): Fix constraint so that
6257         BUILTIN-PTR-THREE-WAY does not require three_way_comparable_with.
6258         * testsuite/18_support/comparisons/object/builtin-ptr-three-way.cc:
6259         New test.
6260
6261         PR libstdc++/94562
6262         * include/bits/shared_ptr.h (operator<=>): Define for C++20.
6263         * include/bits/shared_ptr_base.h (operator<=>): Likewise.
6264         * include/bits/unique_ptr.h (operator<=>): Add inline specifier.
6265         * testsuite/20_util/shared_ptr/comparison/cmp_c++20.cc: New test.
6266         * testsuite/20_util/shared_ptr/comparison/less.cc: Do not expect
6267         std::less<A*> to be used when comparing std::shared_ptr<A> objects in
6268         C++20.
6269
6270         PR libstdc++/94565
6271         * libsupc++/compare (__unspec): Add noexcept-specifier to constructor.
6272         * testsuite/18_support/comparisons/categories/94565.cc: New test.
6273
6274 2020-04-13  Iain Sandoe  <iain@sandoe.co.uk>
6275
6276         * include/std/coroutine: Update coroutines builtin define,
6277         per n4861.
6278
6279 2020-04-09  Jonathan Wakely  <jwakely@redhat.com>
6280
6281         * libsupc++/compare (compare_three_way): Fix noexcept-specifier.
6282         (strong_order, weak_order, partial_order): Replace uses of <=> with
6283         compare_three_way function object (LWG 3324).
6284         * testsuite/18_support/comparisons/algorithms/partial_order.cc: Add
6285         equality operator so that X satisfies three_way_comparable.
6286         * testsuite/18_support/comparisons/algorithms/strong_order.cc:
6287         Likewise.
6288         * testsuite/18_support/comparisons/algorithms/weak_order.cc: Likewise.
6289
6290         * include/bits/unique_ptr.h (operator<=>): Define for C++20.
6291         * testsuite/20_util/default_delete/48631_neg.cc: Adjust dg-error line.
6292         * testsuite/20_util/default_delete/void_neg.cc: Likewise.
6293         * testsuite/20_util/unique_ptr/comparison/compare.cc: New test.
6294         * testsuite/20_util/unique_ptr/comparison/compare_c++20.cc: New test.
6295
6296 2020-04-08  Jonathan Wakely  <jwakely@redhat.com>
6297
6298         * include/bits/slice_array.h (operator==(const slice&, const slice&)):
6299         Define for C++20.
6300         * include/std/complex (operator==(const T&, const complex<T>&))
6301         (operator!=(const complex<T>&, const complex<T>&))
6302         (operator!=(const complex<T>&, const T&))
6303         (operator!=(const T&, const complex<T>&)): Do not declare for C++20.
6304         * testsuite/26_numerics/slice/compare.cc: New test.
6305
6306         * include/std/charconv (to_chars_result, from_chars_result): Add
6307         defaulted equality comparisons for C++20.
6308         * testsuite/20_util/from_chars/compare.cc: New test.
6309         * testsuite/20_util/to_chars/compare.cc: New test.
6310
6311 2020-04-07  Jonathan Wakely  <jwakely@redhat.com>
6312
6313         PR libstdc++/94520
6314         * include/std/charconv (__integer_to_chars_result_type)
6315         (__integer_from_chars_result_type): Use __or_ instead of __or_v_ to
6316         allow use in C++14.
6317         * testsuite/20_util/from_chars/1.cc: Run test as C++14 and replace
6318         use of std::string_view with std::string.
6319         * testsuite/20_util/from_chars/2.cc: Likewise.
6320         * testsuite/20_util/to_chars/1.cc: Likewise.
6321         * testsuite/20_util/to_chars/2.cc: Likewise.
6322
6323 2020-04-06  Jonathan Wakely  <jwakely@redhat.com>
6324
6325         PR libstdc++/94498
6326         * include/bits/char_traits.h (__gnu_cxx::char_traits::move): Make it
6327         usable in constant expressions for C++20.
6328         (__gnu_cxx::char_traits::copy, __gnu_cxx::char_traits::assign): Add
6329         _GLIBCXX20_CONSTEXPR.
6330         (std::char_traits<char>, std::char_traits<wchar_t>)
6331         (std::char_traits<char8_t>): Make move, copy and assign usable in
6332         constant expressions for C++20.
6333         (std::char_traits<char16_t>, std::char_traits<char32_t>): Make move
6334         and copy usable in constant expressions for C++20.
6335         * include/std/string_view (basic_string_view::copy): Add
6336         _GLIBCXX20_CONSTEXPR.
6337         * testsuite/21_strings/basic_string_view/operations/copy/char/
6338         constexpr.cc: New test.
6339         * testsuite/21_strings/basic_string_view/operations/copy/wchar_t/
6340         constexpr.cc: New test.
6341
6342 2020-04-05  Gerald Pfeifer  <gerald@pfeifer.com>
6343
6344         * doc/xml/manual/appendix_contributing.xml: Refer to Git
6345         documentation instead of Subversion.  Switch to https.
6346         * doc/html/manual/appendix_contributing.html: Regenerate.
6347
6348 2020-04-03  Jonathan Wakely  <jwakely@redhat.com>
6349
6350         PR libstdc++/93960
6351         * include/bits/ptr_traits.h (__to_address): Add special case for debug
6352         iterators, to avoid dereferenceable check.
6353         * testsuite/20_util/to_address/1_neg.cc: Adjust dg-error line number.
6354         * testsuite/20_util/to_address/debug.cc: New test.
6355
6356 2020-04-01  Andrea Corallo  <andrea.corallo@arm.com>
6357
6358         * testsuite/experimental/net/execution_context/use_service.cc:
6359         Require pthread and gthreads.
6360
6361 2020-04-01  Gerald Pfeifer  <gerald@pfeifer.com>
6362
6363         * doc/xml/manual/appendix_free.xml: Move "free books" list from
6364         fsf.org to gnu.org.
6365         * doc/html/manual/appendix_free.html: Regenerate.
6366
6367 2020-03-31  Ville Voutilainen  <ville.voutilainen@gmail.com>
6368
6369         Library-side tests for parenthesized aggregate init
6370
6371         PR c++/92878
6372         PR c++/92947
6373
6374         * testsuite/20_util/allocator_traits/members/92878_92947.cc: New.
6375         * testsuite/20_util/any/assign/92878_92947.cc: Likewise.
6376         * testsuite/20_util/any/cons/92878_92947.cc: Likewise.
6377         * testsuite/20_util/is_constructible/92878_92947.cc: Likewise.
6378         * testsuite/20_util/optional/assignment/92878_92947.cc: Likewise.
6379         * testsuite/20_util/optional/cons/92878_92947.cc: Likewise.
6380         * testsuite/20_util/pair/cons/92878_92947.cc: Likewise.
6381         * testsuite/20_util/shared_ptr/creation/92878_92947.cc: Likewise.
6382         * testsuite/20_util/specialized_algorithms/construct_at/92878_92947.cc:
6383         Likewise.
6384         * testsuite/20_util/unique_ptr/creation/92878_92947.cc: Likewise.
6385         * testsuite/20_util/uses_allocator/92878_92947.cc: Likewise.
6386         * testsuite/20_util/variant/92878_92947.cc: Likewise.
6387         * testsuite/23_containers/deque/modifiers/emplace/92878_92947.cc:
6388         Likewise.
6389         * testsuite/23_containers/forward_list/modifiers/92878_92947.cc:
6390         Likewise.
6391         * testsuite/23_containers/list/modifiers/emplace/92878_92947.cc:
6392         Likewise.
6393         * testsuite/23_containers/map/modifiers/emplace/92878_92947.cc:
6394         Likewise.
6395         * testsuite/23_containers/multimap/modifiers/emplace/92878_92947.cc:
6396         Likewise.
6397         * testsuite/23_containers/multiset/modifiers/emplace/92878_92947.cc:
6398         Likewise.
6399         * testsuite/23_containers/priority_queue/92878_92947.cc: Likewise.
6400         * testsuite/23_containers/queue/92878_92947.cc: Likewise.
6401         * testsuite/23_containers/set/modifiers/emplace/92878_92947.cc:
6402         Likewise.
6403         * testsuite/23_containers/stack/92878_92947.cc: Likewise.
6404         * testsuite/23_containers/unordered_map/modifiers/92878_92947.cc:
6405         Likewise.
6406         * testsuite/23_containers/unordered_multimap/modifiers/92878_92947.cc:
6407         Likewise.
6408         * testsuite/23_containers/unordered_multiset/modifiers/92878_92947.cc:
6409         Likewise.
6410         * testsuite/23_containers/unordered_set/modifiers/92878_92947.cc:
6411         Likewise.
6412         * testsuite/23_containers/vector/modifiers/emplace/92878_92947.cc:
6413         Likewise.
6414
6415 2020-03-28  Jonathan Wakely  <jwakely@redhat.com>
6416
6417         * testsuite/20_util/is_constructible/value-2.cc: Fix test to account
6418         for changes due to parenthesized aggregate-initialization in C++20.
6419         * testsuite/20_util/time_point/cons/81468.cc: Fix test to not clash
6420         with std::chrono::sys_time in C++20.
6421
6422         * include/bits/stl_iterator.h (reverse_iterator): Use requires-clause
6423         to constrain C++20 versions of comparison operators. Fix backwards
6424         logic of relational operators.
6425         (move_iterator): Use requires-clause to constrain comparison operators
6426         in C++20. Do not declare non-standard same-type overloads for C++20.
6427         * testsuite/24_iterators/move_iterator/rel_ops_c++20.cc: Check result
6428         of comparisons and check using greedy_ops type.
6429         * testsuite/24_iterators/reverse_iterator/rel_ops_c++20.cc: Likewise.
6430         * testsuite/24_iterators/move_iterator/greedy_ops.cc: Remove redundant
6431         main function from compile-only test.
6432         * testsuite/24_iterators/reverse_iterator/greedy_ops.cc: Likewise.
6433
6434 2020-03-27  Jonathan Wakely  <jwakely@redhat.com>
6435
6436         * include/bits/range_cmp.h (__cpp_lib_ranges): Define.
6437         * include/bits/stl_iterator.h: Check value of __cpp_concepts so that
6438         C++20 concepts are required.
6439         * include/bits/stl_iterator_base_types.h: Likewise.
6440         * include/std/concepts: Likewise.
6441         * include/std/version: Likewise.
6442         * testsuite/std/ranges/headers/ranges/synopsis.cc: Check feature test
6443         macro.
6444
6445         * include/bits/stl_iterator.h (reverse_iterator::iterator_concept)
6446         (reverse_iterator::iterator_category): Define for C++20.
6447         (reverse_iterator): Define comparison operators correctly for C++20.
6448         (__normal_iterator): Add constraints to comparison operators for C++20.
6449         (move_iterator::operator++(int)) [__cpp_lib_concepts]: Define new
6450         overload for input iterators.
6451         (move_iterator): Add constraints to comparison operators for C++20.
6452         Define operator<=> for C++20.
6453         * testsuite/24_iterators/move_iterator/input_iterator.cc: New test.
6454         * testsuite/24_iterators/move_iterator/move_only.cc: New test.
6455         * testsuite/24_iterators/move_iterator/rel_ops_c++20.cc: New test.
6456         * testsuite/24_iterators/reverse_iterator/rel_ops_c++20.cc: New test.
6457
6458         * include/bits/iterator_concepts.h (__detail::__decay_copy)
6459         (__detail::__member_begin, __detail::__adl_begin): Move here from
6460         <bits/range_access.h>.
6461         (__detail::__ranges_begin, __detail::__range_iter_t): Define.
6462         * bits/range_access.h (__cust_access::__decay_copy)
6463         (__cust_access::__member_begin, __cust_access::__adl_begin): Move to
6464         <bits/iterator_concepts.h>.
6465         (ranges::iterator_t): Use __detail::__range_iter_t.
6466         * include/bits/stl_iterator.h (back_insert_iterator): Simplify
6467         conditional compilation. Add _GLIBCXX20_CONSTEXPR to all members.
6468         (front_insert_iterator): Likewise.
6469         (insert_iterator): Implement changes from P0896R4 for C++20.
6470         * testsuite/24_iterators/back_insert_iterator/constexpr.cc: New test.
6471         * testsuite/24_iterators/front_insert_iterator/constexpr.cc: New test.
6472         * testsuite/24_iterators/headers/iterator/synopsis_c++17.cc: Adjust
6473         for inclusion in synopsis_c++20.cc which expects different signatures
6474         for some function templates.
6475         * testsuite/24_iterators/insert_iterator/constexpr.cc: New test.
6476
6477         * include/std/type_traits (__is_array_convertible): Move definition
6478         to immediately after is_convertible.
6479
6480 2020-03-26  Jonathan Wakely  <jwakely@redhat.com>
6481
6482         * include/std/chrono (chrono::days, chrono::weeks, chrono::years)
6483         (chrono::months, chrono::sys_days, chrono::local_t)
6484         (chrono::local_time, chrono::local_seconds, chrono::local_days):
6485         Define for C++20.
6486         (chrono::time_point): Add missing static assert.
6487         * testsuite/20_util/time_point/requirements/duration_neg.cc: New test.
6488         * testsuite/std/time/clock/file/overview.cc: New test.
6489         * testsuite/std/time/clock/file/members.cc: New test.
6490         * testsuite/std/time/syn_c++20.cc: New test.
6491
6492 2020-03-25  Mike Crowe  <mac@mcrowe.com>
6493
6494         * testsuite/30_threads/shared_timed_mutex/try_lock_until/1.cc: New
6495         test.
6496         * testsuite/30_threads/shared_timed_mutex/try_lock_until/2.cc: New
6497         test.
6498
6499 2020-03-25  Jonathan Wakely  <jwakely@redhat.com>
6500
6501         * include/bits/fs_fwd.h (filesystem::__file_clock): Move to ...
6502         * include/std/chrono (filesystem::__file_clock): Here.
6503         (filesystem::__file_clock::from_sys, filesystem::__file_clock::to_sys):
6504         Define public member functions for C++20.
6505         (is_clock, is_clock_v): Define traits for C++20.
6506         * include/std/condition_variable (condition_variable::wait_until): Add
6507         check for valid clock.
6508         * include/std/future (_State_baseV2::wait_until): Likewise.
6509         * include/std/mutex (__timed_mutex_impl::_M_try_lock_until): Likewise.
6510         * include/std/shared_mutex (shared_timed_mutex::try_lock_shared_until):
6511         Likewise.
6512         * include/std/thread (this_thread::sleep_until): Likewise.
6513         * testsuite/30_threads/condition_variable/members/2.cc: Qualify
6514         slow_clock with new namespace.
6515         * testsuite/30_threads/condition_variable/members/clock_neg.cc: New
6516         test.
6517         * testsuite/30_threads/condition_variable_any/members/clock_neg.cc:
6518         New test.
6519         * testsuite/30_threads/future/members/clock_neg.cc: New test.
6520         * testsuite/30_threads/recursive_timed_mutex/try_lock_until/3.cc:
6521         Qualify slow_clock with new namespace.
6522         * testsuite/30_threads/recursive_timed_mutex/try_lock_until/
6523         clock_neg.cc: New test.
6524         * testsuite/30_threads/shared_future/members/clock_neg.cc: New
6525         test.
6526         * testsuite/30_threads/shared_lock/locking/clock_neg.cc: New test.
6527         * testsuite/30_threads/shared_timed_mutex/try_lock_until/clock_neg.cc:
6528         New test.
6529         * testsuite/30_threads/timed_mutex/try_lock_until/3.cc: Qualify
6530         slow_clock with new namespace.
6531         * testsuite/30_threads/timed_mutex/try_lock_until/4.cc: Likewise.
6532         * testsuite/30_threads/timed_mutex/try_lock_until/clock_neg.cc: New
6533         test.
6534         * testsuite/30_threads/unique_lock/locking/clock_neg.cc: New test.
6535         * testsuite/std/time/traits/is_clock.cc: New test.
6536         * testsuite/util/slow_clock.h (slow_clock): Move to __gnu_test
6537         namespace.
6538
6539 2020-03-21  Jonathan Wakely  <jwakely@redhat.com>
6540
6541         PR libstdc++/93245
6542         * include/experimental/bits/fs_path.h (path::generic_string<C,T,A>()):
6543         * testsuite/experimental/filesystem/path/generic/generic_string.cc:
6544         Improve test coverage.
6545
6546         PR libstdc++/94242
6547         * include/bits/fs_path.h (path::_S_str_convert): Replace first
6548         parameter with basic_string_view so that strings with different
6549         allocators can be accepted.
6550         (path::generic_string<C,T,A>()): Use basic_string object that uses the
6551         right allocator type.
6552         * testsuite/27_io/filesystem/path/generic/94242.cc: New test.
6553         * testsuite/27_io/filesystem/path/generic/generic_string.cc: Improve
6554         test coverage.
6555
6556 2020-03-18  Jonathan Wakely  <jwakely@redhat.com>
6557
6558         PR libstdc++/94033
6559         * include/std/type_traits (__is_nt_default_constructible_atom): Remove.
6560         (__is_nt_default_constructible_impl): Remove.
6561         (__is_nothrow_default_constructible_impl): Remove.
6562         (__is_nt_constructible_impl): Add bool template parameter. Adjust
6563         partial specializations.
6564         (__is_nothrow_constructible_impl): Replace class template with alias
6565         template.
6566         (is_nothrow_default_constructible): Derive from alias template
6567         __is_nothrow_constructible_impl instead of
6568         __is_nothrow_default_constructible_impl.
6569         * testsuite/20_util/is_nothrow_constructible/94003.cc: New test.
6570
6571         * include/std/stop_token (stop_token::_Stop_state_ref): Define
6572         comparison operators explicitly if the compiler won't synthesize them.
6573
6574         * include/bits/stl_algobase.h (__lexicographical_compare_aux): Check
6575         __cpp_lib_concepts before using iter_reference_t.
6576         * include/bits/stream_iterator.h (istream_iterator): Check
6577         __cpp_lib_concepts before using default_sentinel_t.
6578         * include/bits/streambuf_iterator.h (istreambuf_iterator): Likewise.
6579
6580         PR libstdc++/94203
6581         * include/experimental/executor (executor::executor(Executor)): Call
6582         make_shared directly instead of _M_create. Create _Tgt1 object.
6583         (executor::executor(allocator_arg_t, const ProtoAlloc&, Executor)):
6584         Call allocate_shared directly instead of _M_create. Create _Tgt2
6585         object.
6586         (executor::target_type): Add cast needed for new _Tgt interface.
6587         (executor::target): Define when RTTI is disabled. Use _Tgt::_M_func.
6588         (executor::_Tgt): Define the same interface whether RTTI is enabled or
6589         not.
6590         (executor::_Tgt::target_type, executor::_Tgt::target): Do not use
6591         std::type_info in the interface.
6592         (executor::_Tgt::_M_func): Add data member.
6593         (executor::_TgtImpl): Replace with _Tgt1 and _Tgt2 class templates.
6594         (executor::_Tgt1::_S_func): Define function to access target without
6595         depending on RTTI.
6596         (executor::_M_create): Remove.
6597         (operator==, operator!=): Simplify comparisons for executor.
6598         * include/experimental/socket (is_error_code_enum<socket_errc>):
6599         Define specialization before use.
6600         * testsuite/experimental/net/executor/1.cc: New test.
6601
6602 2020-03-16  Jonathan Wakely  <jwakely@redhat.com>
6603
6604         PR libstdc++/94199
6605         * include/experimental/executor (service_already_exists): Add default
6606         constructor. Declare make_service to be a friend.
6607         * testsuite/experimental/net/execution_context/make_service.cc: New
6608         test.
6609
6610 2020-03-12  Jonathan Wakely  <jwakely@redhat.com>
6611
6612         * testsuite/tr1/8_c_compatibility/cstdlib/functions.cc: Do not pass
6613         a null pointer to functions with nonnull(1) attribute.
6614
6615 2020-03-11  Patrick Palka  <ppalka@redhat.com>
6616
6617         * include/std/ranges (split_view::_OuterIter::_OuterIter): Typo fix,
6618         'address' -> 'std::__addressof'.
6619         * testsuite/std/ranges/adaptors/split.cc: Test taking the split_view of
6620         a non-forward input_range.
6621         * testsuite/util/testsuite_iterators.h (output_iterator_wrapper): Make
6622         default constructor protected instead of deleted, like with
6623         input_iterator_wrapper.
6624         (test_range::iterator): Add comment explaining that this type is used
6625         only when the underlying wrapper is input_iterator_wrapper or
6626         output_iterator_wrapper.  Remove delegating defaulted constructor so
6627         that the inherited default constructor is used instead.
6628
6629         LWG 3286 ranges::size is not required to be valid after a call to
6630         ranges::begin on an input range
6631         * include/std/ranges (subrange::subrange): Split single-argument
6632         constructor into two, one constrained by _S_store_size and another by
6633         !_S_store_size.
6634         (take_view::begin): Call size() before calling ranges::begin(_M_base).
6635         * testsuite/std/ranges/adaptors/lwg3286.cc: New test.
6636         * testsuite/std/ranges/subrange/lwg3286.cc: New test.
6637
6638 2020-03-10  Jonathan Wakely  <jwakely@redhat.com>
6639
6640         * include/std/ranges (split_view::_OuterIter::__at_end): Use __current
6641         instead of _M_current.
6642         (split_view::_OuterIter::operator++): Likewise.
6643
6644         * include/std/ranges (transform_view::_Iterator::__iter_move): Remove.
6645         (transform_view::_Iterator::operator*): Add noexcept-specifier.
6646         (transform_view::_Iterator::iter_move): Inline __iter_move body here.
6647         (split_view::_OuterIter::__current): Add noexcept.
6648         (split_view::_InnerIter::__iter_swap): Remove.
6649         (split_view::_InnerIter::__iter_move): Remove.
6650         (split_view::_InnerIter::_M_i_current): New accessors.
6651         (split_view::_InnerIter::__at_end): Use _M_i_current().
6652         (split_view::_InnerIter::operator*): Likewise.
6653         (split_view::_InnerIter::operator++): Likewise.
6654         (iter_move(const _InnerIter&)): Likewise.
6655         (iter_swap(const _InnerIter&, const _InnerIter&)): Likewise.
6656         * testsuite/std/ranges/adaptors/split.cc: Check noexcept-specifier
6657         for iter_move and iter_swap on split_view's inner iterator.
6658
6659         PR c++/94117
6660         * include/std/ranges (ranges::transform_view::_Iterator::iter_move):
6661         Change expression in noexcept-specifier to match function body.
6662
6663         * testsuite/23_containers/unordered_set/allocator/ext_ptr.cc: Add
6664         comment explaining multiple dg-do directives.
6665         * testsuite/24_iterators/ostream_iterator/1.cc: Fix do-do directive
6666         so test is run as well as compiled.
6667
6668 2020-03-09  Jonathan Wakely  <jwakely@redhat.com>
6669
6670         PR libstdc++/94063
6671         * src/c++17/fs_path.cc (path::operator+=(const path&)): Add kluge to
6672         handle concatenations that change the type of the first component.
6673         (path::operator+=(basic_string_view<value_type>)): Likewise.
6674         * testsuite/27_io/filesystem/path/concat/94063.cc: New test.
6675
6676 2020-03-06  Patrick Palka  <ppalka@redhat.com>
6677
6678         * include/std/ranges (join_view::_Sentinel<_Const>): Befriend
6679         join_view::_Sentinel<!_Const>.
6680         * testsuite/std/ranges/adaptors/join.cc: Augment test.
6681
6682         PR libstdc++/93978
6683         * include/bits/range_access.h (__cust_access::_Empty::operator()):
6684         Declare return type to be bool instead of auto.
6685         * testsuite/std/ranges/adaptors/93978.cc: New test.
6686
6687 2020-03-06  Jonathan Wakely  <jwakely@redhat.com>
6688
6689         PR libstdc++/94069
6690         * include/std/shared_mutex [!PTHREAD_RWLOCK_INITIALIZER]
6691         (__shared_mutex_pthread::__shared_mutex_pthread()): Remove incorrect
6692         second argument to __glibcxx_rwlock_init.
6693         * testsuite/30_threads/shared_timed_mutex/94069.cc: New test.
6694
6695         PR libstdc++/93244
6696         * testsuite/27_io/filesystem/path/generic/generic_string.cc: Adjust
6697         test to not fail due to PR 94063.
6698         * testsuite/27_io/filesystem/path/generic/utf.cc: Likewise.
6699         * testsuite/27_io/filesystem/path/generic/wchar_t.cc: Likewise.
6700
6701 2020-03-06  Andreas Krebbel  <krebbel@linux.ibm.com>
6702
6703         * src/c++11/system_error.cc: Omit the ENOTSUP case statement if it
6704         would match ENOSYS.
6705
6706 2020-03-05  Jonathan Wakely  <jwakely@redhat.com>
6707
6708         * testsuite/27_io/filesystem/operations/all.cc: Mark unused variable.
6709         * testsuite/27_io/filesystem/operations/copy.cc: Fix typo.
6710         * testsuite/experimental/filesystem/operations/copy.cc: Likewise.
6711         * testsuite/27_io/filesystem/operations/file_size.cc: Use correct type
6712         for return value, and in comparison.
6713         * testsuite/experimental/filesystem/operations/file_size.cc: Likewise.
6714
6715         PR libstdc++/94051
6716         * include/std/string_view: Include <bits/ostream_insert.h>.
6717         * testsuite/21_strings/basic_string_view/inserters/94051.cc: New test.
6718
6719 2020-03-04  Jonathan Wakely  <jwakely@redhat.com>
6720
6721         * include/bits/cpp_type_traits.h (__memcpyable): Fix comment.
6722
6723 2020-03-04  Patrick Palka  <ppalka@redhat.com>
6724
6725         PR libstdc++/94017
6726         * include/bits/ranges_algobase.h (__fill_n_fn::operator()): Refine
6727         condition for when to use memset, making sure to additionally check that
6728         the output pointer's value type is a non-volatile byte type.  Instead of
6729         requiring that the fill type is a byte type, just require that it's an
6730         integral type.
6731         * testsuite/20_util/specialized_algorithms/uninitialized_fill/94017.cc:
6732         New test.
6733         * testsuite/20_util/specialized_algorithms/uninitialized_fill_n/94017.cc:
6734         New test.
6735         * testsuite/25_algorithms/fill/94013.cc: Uncomment part of test that was
6736         blocked by PR 94017.
6737         * testsuite/25_algorithms/fill/94017.cc: New test.
6738         * testsuite/25_algorithms/fill_n/94017.cc: New test.
6739
6740         LWG 3355 The memory algorithms should support move-only input iterators
6741         introduced by P1207
6742         * include/bits/ranges_uninitialized.h
6743         (__uninitialized_copy_fn::operator()): Use std::move to avoid attempting
6744         to copy __ifirst, which could be a move-only input iterator.  Use
6745         operator- instead of ranges::distance to compute distance from a sized
6746         sentinel.
6747         (__uninitialized_copy_n_fn::operator()): Likewise.
6748         (__uninitialized_move_fn::operator()): Likewise.
6749         (__uninitialized_move_n_fn::operator()): Likewise.
6750         (__uninitialized_destroy_fn::operator()): Use std::move to avoid
6751         attempting to copy __first.
6752         (__uninitialized_destroy_n_fn::operator()): Likewise.
6753         * testsuite/20_util/specialized_algorithms/destroy/constrained.cc:
6754         Augment test.
6755         * .../specialized_algorithms/uninitialized_copy/constrained.cc:
6756         Likewise.
6757         * .../specialized_algorithms/uninitialized_move/constrained.cc:
6758         Likewise.
6759
6760         * testsuite/util/testsuite_iterators.h (test_range::get_iterator): Make
6761         protected instead of private.
6762         (test_sized_range_sized_sent): New.
6763
6764         * testsuite/util/testsuite_iterators.h (input_iterator_wrapper_nocopy):
6765         New testsuite iterator.
6766         * testsuite/24_iterators/counted_iterator/lwg3389.cc: use it.
6767         * testsuite/24_iterators/move_iterator/lwg3390.cc: Likewise.
6768
6769         * include/bits/ranges_uninitialized.h
6770         (uninitialized_copy_fn::operator()): Pass a reference type as the first
6771         argument to is_nothrow_assignable_v.
6772         (uninitialized_copy_fn::operator()): Likewise.
6773         (uninitialized_move_fn::operator()): Likewise.  Return an in_out_result
6774         with the input iterator stripped of its move_iterator.
6775         (uninitialized_move_n_fn::operator()): Likewise.
6776         (uninitialized_fill_fn::operator()): Pass a reference type as the first
6777         argument to is_nothrow_assignable_v.
6778         (uninitialized_fill_n_fn::operator()): Likewise.
6779
6780 2020-03-03  Jonathan Wakely  <jwakely@redhat.com>
6781
6782         PR libstdc++/94013
6783         * include/bits/cpp_type_traits.h (__memcpyable, __memcmpable): New
6784         traits to control when to use memmove and memcmp optimizations.
6785         (__is_nonvolatile_trivially_copyable): New helper trait.
6786         * include/bits/ranges_algo.h (__lexicographical_compare_fn): Do not
6787         use memcmp optimization with volatile data.
6788         * include/bits/ranges_algobase.h (__equal_fn): Use __memcmpable.
6789         (__copy_or_move, __copy_or_move_backward): Use __memcpyable.
6790         * include/bits/stl_algobase.h (__copy_move_a2): Use __memcpyable.
6791         (__copy_move_backward_a2): Likewise.
6792         (__equal_aux1): Use __memcmpable.
6793         (__lexicographical_compare_aux): Do not use memcmp optimization with
6794         volatile data.
6795         * testsuite/25_algorithms/copy/94013.cc: New test.
6796         * testsuite/25_algorithms/copy_backward/94013.cc: New test.
6797         * testsuite/25_algorithms/equal/94013.cc: New test.
6798         * testsuite/25_algorithms/fill/94013.cc: New test.
6799         * testsuite/25_algorithms/lexicographical_compare/94013.cc: New test.
6800         * testsuite/25_algorithms/move/94013.cc: New test.
6801         * testsuite/25_algorithms/move_backward/94013.cc: New test.
6802
6803         * include/bits/stl_algobase.h (lexicographical_compare_three_way):
6804         Avoid redundant iterator comparisons (LWG 3410).
6805
6806 2020-03-02  Jonathan Wakely  <jwakely@redhat.com>
6807
6808         PR libstdc++/93972
6809         * include/bits/stl_algobase.h (__memcmp): Allow pointer types to
6810         differ.
6811         * testsuite/25_algorithms/lexicographical_compare/uchar.cc: New test.
6812
6813         * include/std/ranges (__detail::__maybe_empty_t): Rename to
6814         __maybe_present_t.
6815         (__adaptor::_RangeAdaptor, join_view, split_view): Use new name.
6816
6817         * include/bits/ranges_algo.h (shift_right): Add 'typename' to
6818         dependent type.
6819
6820 2020-03-01  H.J. Lu  <hongjiu.lu@intel.com>
6821
6822         * config/abi/post/x86_64-linux-gnu/x32/baseline_symbols.txt: Updated.
6823
6824 2020-02-29  John David Anglin  <danglin@gcc.gnu.org>
6825
6826         * testsuite/17_intro/headers/c++1998/charset.cc: Skip on *-*-hpux*.
6827         * testsuite/17_intro/headers/c++2011/charset.cc: Likewise.
6828         * testsuite/17_intro/headers/c++2014/charset.cc: Likewise.
6829         * testsuite/17_intro/headers/c++2017/charset.cc: Likewise.
6830         * testsuite/17_intro/headers/c++2020/charset.cc: Likewise.
6831
6832         * testsuite/30_threads/condition_variable_any/stop_token/wait_on.cc:
6833         Add libatomic option.
6834         * testsuite/30_threads/jthread/jthread.cc: Likewise.
6835
6836 2020-02-29  François Dumont  <fdumont@gcc.gnu.org>
6837
6838         * include/bits/stl_algo.h
6839         (__find_if, __count_if, __is_permutation, std::is_permutation): Move...
6840         * include/bits/stl_algobase.h: ...here.
6841         * include/bits/hashtable_policy.h: Remove <bits/stl_algo.h> include.
6842
6843 2020-02-29  John David Anglin  <danglin@gcc.gnu.org>
6844
6845         * testsuite/30_threads/stop_token/stop_callback.cc: Add libatomic
6846         option.
6847         * testsuite/30_threads/stop_token/stop_callback/deadlock-mt.cc:
6848         Likewise.
6849         * testsuite/30_threads/stop_token/stop_callback/deadlock.cc: Likewise.
6850         * testsuite/30_threads/stop_token/stop_callback/destroy.cc: Likewise.
6851         * testsuite/30_threads/stop_token/stop_callback/invoke.cc: Likewise.
6852         * testsuite/30_threads/stop_token/stop_source.cc: Likewise.
6853         * testsuite/30_threads/stop_token/stop_source/assign.cc: Likewise.
6854         * testsuite/30_threads/stop_token/stop_token.cc: Likewise.
6855         * testsuite/30_threads/stop_token/stop_token/stop_possible.cc:
6856         Likewise.
6857
6858         PR libstdc++/92906
6859         * config/abi/post/hppa-linux-gnu/baseline_symbols.txt: Update.
6860
6861 2020-02-28  Patrick Palka  <ppalka@redhat.com>
6862
6863         PR libstdc++/93972
6864         * include/bits/ranges_algo.h (__lexicographical_compare_fn::operator()):
6865         Fix condition for when to use memcmp, making it consistent with the
6866         corresponding condition used in std::lexicographical_compare.
6867         * testsuite/25_algorithms/lexicographical_compare/93972.cc: New test.
6868
6869         * testsuite/26_numerics/headers/numeric/synopsis.cc: Add signatures for
6870         functions introduced in C++11, C++17 and C++2a.  Add 'constexpr' to
6871         existing signatures for C++2a.
6872
6873 2020-02-28  Jonathan Wakely  <jwakely@redhat.com>
6874
6875         * testsuite/24_iterators/range_operations/advance_debug_neg.cc: Run
6876         test instead of just compiling it.
6877
6878 2020-02-28  Patrick Palka  <ppalka@redhat.com>
6879
6880         * include/std/ranges (reverse_view::_S_needs_cached_begin): Set to false
6881         whenever the underlying range models common_range.
6882
6883         * include/std/ranges (__detail::_CachedPosition): New struct.
6884         (views::filter_view::_S_needs_cached_begin): New member variable.
6885         (views::filter_view::_M_cached_begin): New member variable.
6886         (views::filter_view::begin): Use _M_cached_begin to cache its
6887         result.
6888         (views::drop_view::_S_needs_cached_begin): New static member variable.
6889         (views::drop_view::_M_cached_begin): New member variable.
6890         (views::drop_view::begin): Use _M_cached_begin to cache its result
6891         when _S_needs_cached_begin.
6892         (views::drop_while_view::_M_cached_begin): New member variable.
6893         (views::drop_while_view::begin): Use _M_cached_begin to cache its
6894         result.
6895         (views::reverse_view::_S_needs_cached_begin): New static member
6896         variable.
6897         (views::reverse_view::_M_cached_begin): New member variable.
6898         (views::reverse_view::begin): Use _M_cached_begin to cache its result
6899         when _S_needs_cached_begin.
6900         * testsuite/std/ranges/adaptors/drop.cc: Augment test to check that
6901         drop_view::begin caches its result.
6902         * testsuite/std/ranges/adaptors/drop_while.cc: Augment test to check
6903         that drop_while_view::begin caches its result.
6904         * testsuite/std/ranges/adaptors/filter.cc: Augment test to check that
6905         filter_view::begin caches its result.
6906         * testsuite/std/ranges/adaptors/reverse.cc: Augment test to check that
6907         reverse_view::begin caches its result.
6908
6909 2020-02-28  Jonathan Wakely  <jwakely@redhat.com>
6910
6911         * testsuite/27_io/filesystem/operations/last_write_time.cc: Fixes for
6912         filesystems that silently truncate timestamps.
6913         * testsuite/experimental/filesystem/operations/last_write_time.cc:
6914         Likewise.
6915
6916         * testsuite/21_strings/basic_string/cons/char/1.cc: Disable
6917         -Wstringop-overflow warnings.
6918
6919 2020-02-27  Jonathan Wakely  <jwakely@redhat.com>
6920
6921         * testsuite/lib/libstdc++.exp (v3_target_compile): Add
6922         -fdiagnostics-urls=never to options.
6923
6924 2020-02-27  Patrick Palka  <ppalka@redhat.com>
6925
6926         * include/std/ranges (transform_view::_Iterator<_Const>): Befriend
6927         _Iterator<!_Const>.
6928         (transform_view::_Sentinel<_Const>): Befriend _Sentinel<!_Const>.
6929         (take_view::_Sentinel<_Const>): Likewise.
6930         (take_while_view::_Sentinel<_Const>): Likewise.
6931         (split_view::_OuterIter<_Const>): Befriend _OuterIter<!_Const>.
6932         * testsuite/std/ranges/adaptors/split.cc: Augment test.
6933         * testsuite/std/ranges/adaptors/take.cc: Augment test.
6934         * testsuite/std/ranges/adaptors/take_while.cc: Augment test.
6935         * testsuite/std/ranges/adaptors/transform.cc: Augment test.
6936
6937         * testsuite/25_algorithms/copy/constrained.cc: Don't assume that the
6938         base() of a vector<>::iterator is a pointer.
6939         * testsuite/25_algorithms/copy_backward/constrained.cc: Likewise.
6940         * testsuite/25_algorithms/move/constrained.cc: Likewise.
6941         * testsuite/25_algorithms/move_backward/constrained.cc: Likewise.
6942         * testsuite/25_algorithms/inplace_merge/constrained.cc: Use foo.data()
6943         instead of &foo[0].
6944         * testsuite/25_algorithms/partial_sort/constrained.cc: Likewise.
6945         * testsuite/25_algorithms/partial_sort_copy/constrained.cc: Likewise.
6946         * testsuite/25_algorithms/shuffle/constrained.cc: Likewise.
6947         * testsuite/25_algorithms/sort/constrained.cc: Likewise.
6948         * testsuite/25_algorithms/stable_sort/constrained.cc: Likewise.
6949
6950 2020-02-27  Jonathan Wakely  <jwakely@redhat.com>
6951
6952         * include/debug/array (operator<=>): Define for C++20.
6953         * testsuite/23_containers/array/tuple_interface/get_debug_neg.cc:
6954         Adjust dg-error line numbers.
6955         * testsuite/23_containers/array/tuple_interface/
6956         tuple_element_debug_neg.cc: Likewise.
6957
6958         * testsuite/23_containers/span/back_assert_neg.cc: Add #undef before
6959         defining _GLIBCXX_ASSERTIONS.
6960         * testsuite/23_containers/span/first_2_assert_neg.cc: Likewise.
6961         * testsuite/23_containers/span/first_assert_neg.cc: Likewise.
6962         * testsuite/23_containers/span/front_assert_neg.cc: Likewise.
6963         * testsuite/23_containers/span/index_op_assert_neg.cc: Likewise.
6964         * testsuite/23_containers/span/last_2_assert_neg.cc: Likewise.
6965         * testsuite/23_containers/span/last_assert_neg.cc: Likewise.
6966         * testsuite/23_containers/span/subspan_2_assert_neg.cc: Likewise.
6967         * testsuite/23_containers/span/subspan_3_assert_neg.cc: Likewise.
6968         * testsuite/23_containers/span/subspan_4_assert_neg.cc: Likewise.
6969         * testsuite/23_containers/span/subspan_5_assert_neg.cc: Likewise.
6970         * testsuite/23_containers/span/subspan_6_assert_neg.cc: Likewise.
6971         * testsuite/23_containers/span/subspan_assert_neg.cc: Likewise.
6972
6973         * include/debug/string (__gnu_debug::basic_string::insert): Fix for
6974         C++98 where the member function of the base class returns void.
6975
6976         * testsuite/util/testsuite_iterators.h (forward_iterator_wrapper): Add
6977         equality comparisons that support value-initialized iterators.
6978
6979         * include/bits/boost_concept_check.h (__function_requires): Add
6980         _GLIBCXX14_CONSTEXPR.
6981         * testsuite/25_algorithms/min/concept_checks.cc: New test.
6982
6983 2020-02-26  Patrick Palka  <ppalka@redhat.com>
6984
6985         PR libstdc++/93936
6986         * include/std/ranges (split_view::_InnerIter::operator==): Compare
6987         the operands' _M_i rather than their _M_i.current().
6988         * testsuite/std/ranges/adaptors/split.cc: Augment test.
6989
6990         P1645R1 constexpr for <numeric> algorithms
6991         * include/bits/stl_numeric.h (iota, accumulate, inner_product,
6992         partial_sum, adjacent_difference): Make conditionally constexpr for
6993         C++20.
6994         * include/std/numeric (__cpp_lib_constexpr_numeric): Define this feature
6995         test macro.
6996         (reduce, transform_reduce, exclusive_scan, inclusive_scan,
6997         transform_exclusive_scan, transform_inclusive_scan): Make conditionally
6998         constexpr for C++20.
6999         * include/std/version (__cpp_lib_constexpr_numeric): Define.
7000         * testsuite/26_numerics/accumulate/constexpr.cc: New test.
7001         * testsuite/26_numerics/adjacent_difference/constexpr.cc: Likewise.
7002         * testsuite/26_numerics/exclusive_scan/constexpr.cc: Likewise.
7003         * testsuite/26_numerics/inclusive_scan/constexpr.cc: Likewise.
7004         * testsuite/26_numerics/inner_product/constexpr.cc: Likewise.
7005         * testsuite/26_numerics/iota/constexpr.cc: Likewise.
7006         * testsuite/26_numerics/partial_sum/constexpr.cc: Likewise.
7007         * testsuite/26_numerics/reduce/constexpr.cc: Likewise.
7008         * testsuite/26_numerics/transform_exclusive_scan/constexpr.cc: Likewise.
7009         * testsuite/26_numerics/transform_inclusive_scan/constexpr.cc: Likewise.
7010         * testsuite/26_numerics/transform_reduce/constexpr.cc: Likewise.
7011
7012 2020-02-26  Jonathan Wakely  <jwakely@redhat.com>
7013
7014         * include/bits/ranges_algo.h (__lexicographical_compare_fn): Declare
7015         variables in smaller scope and avoid calling ranges::distance when we
7016         know they are pointers. Remove statically-unreachable use of
7017         __builtin_unreachable().
7018         * include/bits/stl_algobase.h (__lexicographical_compare::__lc):
7019         Define inline.
7020
7021         * include/std/ranges (__detail::__maybe_empty_t): Define new helper
7022         alias.
7023         (__detail::__maybe_const_t): Likewise.
7024         (__adaptor::_RangeAdaptor): Use __maybe_empty_t.
7025         (transform_view, take_view, take_while_view, elements_view): Use
7026         __maybe_const_t.
7027         (join_view, split_view): Use both.
7028
7029 2020-02-25  Patrick Palka  <ppalka@redhat.com>
7030
7031         LWG 3397 basic_istream_view::iterator should not provide
7032         iterator_category
7033         * include/std/ranges (basic_istream_view:_Iterator::iterator_category):
7034         Rename to ...
7035         (basic_istream_view:_Iterator::iterator_concept): ... this.
7036         * testsuite/std/ranges/istream_view.cc: Augment test.
7037
7038         LWG 3325 Constrain return type of transformation function for
7039         transform_view
7040         * include/std/ranges (transform_view): Constrain the return type of the
7041         transformation function as per LWG 3325.
7042         * testsuite/std/ranges/adaptors/lwg3325_neg.cc: New test.
7043
7044         LWG 3313 join_view::_Iterator::operator-- is incorrectly constrained
7045         * include/std/ranges (join_view::_Iterator::operator--): Require that
7046         range_reference_t<_Base> models common_range.
7047         * testsuite/std/ranges/adaptors/lwg3313_neg.cc: New test.
7048
7049         LWG 3301 transform_view::_Iterator has incorrect iterator_category
7050         * include/std/ranges (transform_view::_Iterator::_S_iter_cat): Adjust
7051         determination of iterator_category as per LWG 3301.
7052         * testsuite/std/ranges/adaptors/transform.cc: Augment test.
7053
7054         LWG 3292 iota_view is under-constrained
7055         * include/std/ranges (iota_view): Require that _Winc models semiregular
7056           as per LWG 3292.
7057         * testsuite/std/ranges/iota/lwg3292_neg.cc: New test.
7058
7059 2020-02-25  Jonathan Wakely  <jwakely@redhat.com>
7060
7061         * include/bits/ranges_algobase.h (__copy_or_move): Do not use memmove
7062         during constant evaluation. Call __builtin_memmove directly instead of
7063         __memmove.
7064         (__copy_or_move_backward): Likewise.
7065         * include/bits/stl_algobase.h (__memmove): Remove.
7066         (__copy_move<M, true, random_access_iterator_tag>::__copy_m)
7067         (__copy_move_backward<M, true, random_access_iterator_tag>::__copy_m):
7068         Use __builtin_memmove directly instead of __memmove.
7069         (__copy_move_a2): Do not use memmove during constant evaluation.
7070         (__copy_move_backward_a2): Use _IsMove constant to select correct
7071         __copy_move_backward specialization.
7072         * testsuite/25_algorithms/copy_backward/constexpr.cc: Check for copies
7073         begin turned into moves during constant evaluation.
7074
7075         * testsuite/25_algorithms/move_backward/93872.cc: Add test left out of
7076         previous commit.
7077
7078         PR libstdc++/93872
7079         * include/bits/stl_algobase.h (__memmove): Cast away const before
7080         doing move assignment.
7081         * testsuite/25_algorithms/move/93872.cc: New test.
7082         * testsuite/25_algorithms/move_backward/93872.cc: New test.
7083
7084 2020-02-24  Patrick Palka  <ppalka@redhat.com>
7085
7086         PR libstdc++/93884
7087         * include/bits/ranges_algobase.h (__copy_or_move,
7088         __copy_or_move_backward): Don't inspect the iter_value_t of the output
7089         iterator, instead inspect its iterator_traits directly.
7090         * include/bits/stl_iterator.h (back_insert_iterator::container):
7091         Conditionally initialize.
7092         (back_insert_iterator::difference_type): Conditionally define.
7093         (back_insert_iterator::back_insert_iterator): Conditionally define this
7094         default constructor.
7095         (front_insert_iterator::container): Conditionally initialize.
7096         (front_insert_iterator::difference_type): Conditionally define.
7097         (front_insert_iterator::front_insert_iterator): Conditionally define
7098         this default constructor.
7099         * 24_iterators/back_insert_iterator/pr93884.cc: New test.
7100         * 24_iterators/front_insert_iterator/pr93884.cc: New test.
7101
7102         P0769R2 Add shift to <algorithm>
7103         * include/bits/ranges_algo.h (shift_left, shift_right): New.
7104         * testsuite/25_algorithms/shift_left/1.cc: New test.
7105         * testsuite/25_algorithms/shift_right/1.cc: New test.
7106
7107 2020-02-24  Jonathan Wakely  <jwakely@redhat.com>
7108
7109         * include/bits/stream_iterator.h (istream_iterator(default_sentinel_t)):
7110         Make noexcept-specifier conditional.
7111         * testsuite/24_iterators/istream_iterator/cons/sentinel.cc: Check
7112         noexcept-specifier.
7113
7114         * include/bits/stream_iterator.h (istream_iterator(default_sentinel_t)):
7115         Add constructor.
7116         (operator==(istream_iterator, default_sentinel_t)): Add operator.
7117         (ostream_iterator::difference_type): Define to ptrdiff_t for C++20.
7118         * include/bits/streambuf_iterator.h
7119         (istreambuf_iterator(default_sentinel_t)): Add constructor.
7120         (operator==(istreambuf_iterator, default_sentinel_t)): Add operator.
7121         * testsuite/24_iterators/istream_iterator/cons/sentinel.cc:
7122         New test.
7123         * testsuite/24_iterators/istream_iterator/sentinel.cc: New test.
7124         * testsuite/24_iterators/istreambuf_iterator/cons/sentinel.cc:
7125         New test.
7126         * testsuite/24_iterators/istreambuf_iterator/sentinel.cc: New test.
7127
7128         * include/std/ranges (__deep_const_range, __enable_view_impl): Remove.
7129         (ranges::enable_view): Simplify (LWG 3326).
7130         * include/bits/range_access.h (ranges::enable_view): Declare.
7131         * include/bits/regex.h (__enable_view_impl): Remove partial
7132         specialization.
7133         * include/bits/stl_multiset.h (__enable_view_impl): Likewise.
7134         * include/bits/stl_set.h (__enable_view_impl): Likewise.
7135         * include/bits/unordered_set.h (__enable_view_impl): Likewise.
7136         * include/debug/multiset.h (__enable_view_impl): Likewise.
7137         * include/debug/set.h (__enable_view_impl): Likewise.
7138         * include/debug/unordered_set (__enable_view_impl): Likewise.
7139         * include/experimental/string_view (ranges::enable_view): Define
7140         partial specialization.
7141         * include/std/span (ranges::enable_view): Likewise.
7142         * include/std/string_view (ranges::enable_view): Likewise.
7143         * testsuite/std/ranges/view.cc: Check satisfaction of updated concept.
7144
7145 2020-02-21  Jonathan Wakely  <jwakely@redhat.com>
7146
7147         * include/std/optional (operator<=>(optional<T>, optional<U>))
7148         (operator<=>(optional<T>, nullopt), operator<=>(optional<T>, U)):
7149         Define for C++20.
7150         * include/std/tuple (__tuple_cmp): New helper function for <=>.
7151         (operator<=>(tuple<T...>, tuple<U>...)): Define for C++20.
7152         * include/std/variant (operator<=>(variant<T...>, variant<T...>))
7153         (operator<=>(monostate, monostate)): Define for C++20.
7154         * testsuite/20_util/optional/relops/three_way.cc: New test.
7155         * testsuite/20_util/tuple/comparison_operators/three_way.cc: New test.
7156         * testsuite/20_util/variant/89851.cc: Move to ...
7157         * testsuite/20_util/variant/relops/89851.cc: ... here.
7158         * testsuite/20_util/variant/90008.cc: Move to ...
7159         * testsuite/20_util/variant/relops/90008.cc: ... here.
7160         * testsuite/20_util/variant/relops/three_way.cc: New test.
7161
7162 2020-02-20  Patrick Palka  <ppalka@redhat.com>
7163
7164         * include/std/ranges (views::__adaptor::__maybe_refwrap): New utility
7165         function.
7166         (views::__adaptor::_RangeAdaptor::operator()): Add comments.  Use
7167         __maybe_refwrap to capture lvalue references by reference, and then use
7168         unwrap_reference_t to forward the by-reference captures as references.
7169         * testsuite/std/ranges/adaptors/split.cc: Augment test.
7170         * testsuite/std/ranges/adaptors/split_neg.cc: New test.
7171
7172         * include/std/ranges (iota_view): Forward declare _Sentinel.
7173         (iota_view::_Iterator): Befriend _Sentinel.
7174         (iota_view::_Sentinel::_M_equal): New member function.
7175         (iota_view::_Sentinel::operator==): Use it.
7176         (views::_Iota::operator()): Forward __f using the correct type.
7177         * testsuite/std/ranges/access/ssize.cc (test06): Don't call views::iota
7178         with integers of different signedness, to appease iota_view's deduction
7179         guide.
7180         * testsuite/std/ranges/iota/iota_view.cc: Augment test.
7181
7182 2020-02-20  Jonathan Wakely  <jwakely@redhat.com>
7183
7184         * include/bits/range_access.h (ranges::begin): Reject array of
7185         incomplete type.
7186         (ranges::end, ranges::size): Require arrays to be bounded.
7187         (ranges::data): Require lvalue or borrowed_range.
7188         (ranges::iterator_t): Remove constraint.
7189         * testsuite/std/ranges/access/begin.cc: Do not check array of
7190         incomplete type.
7191         * testsuite/std/ranges/access/begin_neg.cc: New test.
7192         * testsuite/std/ranges/access/end_neg.cc: Adjust expected error.
7193         * testsuite/std/ranges/access/size_neg.cc: Adjust expected error.
7194         * testsuite/std/ranges/access/ssize.cc: Do not check array of
7195         incomplete type.
7196
7197         * include/std/system_error (error_category::operator<=>)
7198         (operator<=>(const error_code&, const error_code&))
7199         (operator<=>(const error_condition&, const error_condition&)): Define
7200         for C++20.
7201         * testsuite/19_diagnostics/error_category/operators/less.cc: New test.
7202         * testsuite/19_diagnostics/error_category/operators/three_way.cc: New
7203         test.
7204         * testsuite/19_diagnostics/error_code/operators/equal.cc: Remove
7205         incorrect comment.
7206         * testsuite/19_diagnostics/error_code/operators/less.cc: New test.
7207         * testsuite/19_diagnostics/error_code/operators/not_equal.cc: Remove
7208         incorrect comment.
7209         * testsuite/19_diagnostics/error_code/operators/three_way.cc: New test.
7210         * testsuite/19_diagnostics/error_condition/operators/equal.cc: Remove
7211         incorrect comment.
7212         * testsuite/19_diagnostics/error_condition/operators/less.cc: New test.
7213         * testsuite/19_diagnostics/error_condition/operators/not_equal.cc:
7214         Remove incorrect comment.
7215         * testsuite/19_diagnostics/error_condition/operators/three_way.cc: New
7216         test.
7217
7218         * libsupc++/typeinfo (type_info::operator!=): Remove for C++20.
7219
7220         * include/std/thread (thread::id::operator<=>): Define for C++20.
7221         * testsuite/30_threads/thread/id/70294.cc: Do not take addresses of
7222         functions in namespace std.
7223         * testsuite/30_threads/thread/id/operators_c++20.cc: New test.
7224
7225 2020-02-19  Patrick Palka  <ppalka@redhat.com>
7226
7227         * testsuite/std/ranges/adaptors/split.cc (test03): Don't include the
7228         null terminator of the underlying string as part of the test_range.
7229         (main): Call test03.
7230
7231 2020-02-19  Jonathan Wakely  <jwakely@redhat.com>
7232
7233         * include/bits/stl_iterator.h (common_iterator): Add copyable<I>
7234         requirement (LWG 3385).
7235         * testsuite/24_iterators/headers/iterator/synopsis_c++20.cc: Adjust
7236         expected declaration.
7237
7238         * include/std/ranges (take_while_view, drop_view, drop_while_view)
7239         (elements_view:_Iterator): Initialize data members (LWG 3364).
7240
7241         * libsupc++/compare (three_way_comparable): Remove always-false check
7242         that should have been removed with weak_equality (P1959R0).
7243         (three_way_comparable_with): Likewise. Reorder requirements (LWG 3360).
7244
7245         * include/std/concepts (__detail::__partially_ordered_with): Move here
7246         from <compare>.
7247         (totally_ordered, totally_ordered_with): Use __partially_ordered_with
7248         to simplify definition (LWG 3331).
7249         * libsupc++/compare (__detail::__partially_ordered_with): Move to
7250         <concepts>.
7251
7252         * include/std/concepts (totally_ordered_with): Remove redundant
7253         requirement (LWG 3329).
7254
7255         * include/std/ranges (__detail::__convertible_to_non_slicing): New
7256         helper concept.
7257         (__detail::__pair_like_convertible_to): Remove.
7258         (__detail::__pair_like_convertible_from): Add requirements for
7259         non-slicing conversions.
7260         (subrange): Constrain constructors with __convertible_to_non_slicing.
7261         Remove constructors from pair-like types. Add new deduction guide.
7262         * testsuite/std/ranges/subrange/lwg3282_neg.cc: New test.
7263
7264         * include/bits/iterator_concepts.h (iter_move): Add declaration to
7265         prevent unqualified lookup finding a suitable declaration (LWG 3247).
7266
7267         * include/std/memory_resource (polymorphic_allocator::allocate)
7268         (polymorphic_allocator::allocate_object): Change type of exception to
7269         bad_array_new_length (LWG 3237).
7270         * testsuite/20_util/polymorphic_allocator/lwg3237.cc: New test.
7271
7272         * include/std/type_traits (__cpp_lib_unwrap_ref): Define (LWG 3348).
7273         * include/std/version (__cpp_lib_unwrap_ref): Likewise.
7274         * testsuite/20_util/unwrap_reference/1.cc: Check macro.
7275         * testsuite/20_util/unwrap_reference/3.cc: New test.
7276
7277         * include/std/numeric (midpoint(T8, T*)): Do not check for complete
7278         type during overload resolution, use static assert instead (LWG 3200).
7279         * testsuite/26_numerics/midpoint/pointer.cc: Do not test with
7280         incomplete type.
7281         * testsuite/26_numerics/midpoint/pointer_neg.cc: New test.
7282
7283         * include/std/span (span(T (&)[N])): Use non-deduced context to
7284         prevent first parameter from interfering with class template argument
7285         deduction (LWG 3369).
7286         * testsuite/23_containers/span/deduction.cc: Add missing 'const'.
7287         * testsuite/23_containers/span/lwg3255.cc: Check for construction from
7288         rvalues.
7289
7290         * include/std/span (span::const_iterator, span::const_reverse_iterator)
7291         (span::cbegin(), span::cend(), span::crbegin(), span::crend()):
7292         Remove (LWG 3320).
7293         * testsuite/23_containers/span/everything.cc: Replace uses of cbegin
7294         and cend.
7295         * testsuite/20_util/specialized_algorithms/destroy/constrained.cc:
7296         Likewise.
7297         * testsuite/20_util/specialized_algorithms/uninitialized_copy/
7298         constrained.cc: Likewise.
7299         * testsuite/20_util/specialized_algorithms/
7300         uninitialized_default_construct/constrained.cc: Likewise.
7301         * testsuite/20_util/specialized_algorithms/uninitialized_fill/
7302         constrained.cc: Likewise.
7303         * testsuite/20_util/specialized_algorithms/uninitialized_move/
7304         constrained.cc: Likewise.
7305         * testsuite/20_util/specialized_algorithms/
7306         uninitialized_value_construct/constrained.cc: Likewise.
7307
7308         * include/bits/range_access.h (range_size_t): Define alias template.
7309         * include/std/ranges (all_view): Rename to views::all_t (LWG 3335).
7310         * testsuite/std/ranges/adaptors/filter.cc: Adjust to new name.
7311
7312         * include/std/ranges (filter_view, transform_view, take_view)
7313         (join_view, split_view, reverse_view): Remove commented-out converting
7314         constructors (LWG 3280).
7315
7316         * include/std/memory (uninitialized_construct_using_allocator): Use
7317         std::construct_at (LWG 3321).
7318
7319         * include/std/memory_resource (polymorphic_allocator::allocate_bytes)
7320         (polymorphic_allocator::allocate_object)
7321         (polymorphic_allocator::new_object): Add nodiscard attribute (LWG3304).
7322
7323         LWG 3379. "safe" in several library names is misleading
7324         * include/bits/range_access.h (enable_safe_range): Rename to
7325         enable_borrowed_range.
7326         (__detail::__maybe_safe_range): Rename to __maybe_borrowed_range.
7327         (safe_range): Rename to borrowed_range.
7328         * include/bits/ranges_algo.h: Adjust to use new names.
7329         * include/bits/ranges_algobase.h: Likewise.
7330         * include/bits/ranges_uninitialized.h: Likewise.
7331         * include/std/ranges: Likewise.
7332         (safe_iterator_t): Rename to borrowed_iterator_t.
7333         (safe_subrange_t): Rename to borrowed_subrange_t.
7334         * include/std/span: Adjust to use new names.
7335         * include/std/string_view: Likewise.
7336         * include/experimental/string_view: Likewise.
7337         * testsuite/std/ranges/access/begin.cc: Likewise.
7338         * testsuite/std/ranges/access/cbegin.cc: Likewise.
7339         * testsuite/std/ranges/access/cdata.cc: Likewise.
7340         * testsuite/std/ranges/access/cend.cc: Likewise.
7341         * testsuite/std/ranges/access/crbegin.cc: Likewise.
7342         * testsuite/std/ranges/access/crend.cc: Likewise.
7343         * testsuite/std/ranges/access/data.cc: Likewise.
7344         * testsuite/std/ranges/access/end.cc: Likewise.
7345         * testsuite/std/ranges/access/rbegin.cc: Likewise.
7346         * testsuite/std/ranges/access/rend.cc: Likewise.
7347         * testsuite/std/ranges/safe_range.cc: Likewise.
7348         * testsuite/std/ranges/safe_range_types.cc: Likewise.
7349         * testsuite/util/testsuite_iterators.h: Likewise.
7350
7351         * include/std/ranges (tuple_element<0, const subrange<I, S, K>>)
7352         (tuple_element<1, const subrange<I, S, K>>): Add partial
7353         specializations (LWG 3398).
7354         * testsuite/std/ranges/subrange/tuple_like.cc: New test.
7355
7356         * include/bits/ranges_algo.h (__find_fn, __find_first_of_fn)
7357         (__adjacent_find_fn, __remove_if_fn, __remove_copy_if_fn)
7358         (__unique_fn, __unique_copy_fn): Remove redundant conversions to bool.
7359
7360 2020-02-18  Patrick Palka  <ppalka@redhat.com>
7361
7362         P1983R0 Wording for GB301, US296, US292, US291, and US283
7363         * include/std/ranges (filter_view::pred): New member function.
7364         (join_view::_Iterator::_Iterator): Remove now-redundant comment since
7365         P1983R0 fixes the highlighted issue in the same way.
7366         (join_view::_Iterator<_Const>): Add friend
7367         join_view::_Iterator<!_Const>.
7368         (join_view::_M_inner): Remove mutable specifier, effectively reverting
7369         the proposed wording changes of P3278.
7370         (join_view::begin): Refine the condition for when to return a const
7371         iterator.
7372         (split_view::_OuterIter::_OuterIter): Adjust constraints.
7373         * testsuite/std/ranges/adaptors/filter.cc: Test that filter_view::pred
7374         exists and works.
7375
7376 2020-02-18  Jonathan Wakely  <jwakely@redhat.com>
7377
7378         PR libstdc++/93818
7379         * include/std/ranges (_RangeAdaptor): Add deduction guide.
7380         (filter_view::_Iterator): Add alias _Vp_iter and use in place of
7381         iterator_t<_Vp>.
7382         (filter_view::_Iterator::_S_iter_cat()): Add 'typename'.
7383         (transform_view::_Iterator): Add alias _Base_iter and use in place of
7384         iterator_t<_Base>.
7385         (transform_view::_Iterator::_S_iter_cat()): Add 'typename'.
7386         (join_view::_Iterator): Add _Outer_iter and _Inner_iter aliases.
7387         (join_view::_Iterator::_S_iter_cat()): Add 'typename'.
7388         (split_view::_InnerIter::_S_iter_cat()): Likewise.
7389
7390         * testsuite/20_util/integer_comparisons/equal.cc: Fix invalid
7391         assumption that long is wider than int.
7392         * testsuite/20_util/integer_comparisons/greater_equal.cc: Likewise.
7393         * testsuite/20_util/integer_comparisons/less.cc: Likewise.
7394         * testsuite/20_util/integer_comparisons/less_equal.cc: Likewise.
7395         * testsuite/20_util/integer_comparisons/not_equal.cc: Likewise.
7396
7397         P1976R2 Fixed-size span construction from dynamic range
7398         * include/std/span (__cpp_lib_span): Update value.
7399         (span(It, size_type), span(It, End)): Make conditionally explicit. Add
7400         assertion.
7401         (span(R&&), span(const span<OType, OExtent>&)): Likewise and relax
7402         constraints.
7403         (span::first<Count>(), span::last<Count>()): Use explicit type in
7404         return statement.
7405         (as_bytes, as_writable_bytes): Likewise.
7406         * include/std/version (__cpp_lib_span): Update value.
7407         * testsuite/23_containers/span/1.cc: Check new value.
7408         * testsuite/23_containers/span/2.cc: Check new value.
7409         * testsuite/23_containers/span/explicit.cc: New test.
7410
7411         * include/std/span (span::__is_compatible_array): Simplify alias
7412         template by using requires-clause.
7413         (span::__is_compatible_ref): New alias template for constraining
7414         constructors.
7415         (span::__is_compatible_iterator, span::__is_compatible_range): Remove.
7416         (span(It, size_type), span(It, End)): Use __is_compatible_ref.
7417         (span(T(&)[N], span(array<T, N>&), span(const array<T, N>&)): Remove
7418         redundant parentheses.
7419         (span(R&&)): Add missing constraints.
7420
7421         * include/std/span (span): Reorder members and rename template
7422         parameters to match declarations in the C++2a working paper.
7423
7424         P2116R0 Remove tuple-like protocol support from fixed-extent span
7425         * include/std/span (get, tuple_size, tuple_element): Remove.
7426         * testsuite/23_containers/span/everything.cc: Remove checks for
7427         tuple-like API.
7428         * testsuite/23_containers/span/get_neg.cc: Remove.
7429         * testsuite/23_containers/span/tuple_element_dynamic_neg.cc: Remove.
7430         * testsuite/23_containers/span/tuple_element_oob_neg.cc: Remove.
7431         * testsuite/23_containers/span/tuple_size_neg.cc: Remove.
7432
7433 2020-02-17  Patrick Palka  <ppalka@redhat.com>
7434
7435         P2106R0 Alternative wording for GB315 and GB316
7436         * include/bits/ranges_algo.h (in_fun_result): New.
7437         (for_each_result, for_each_n_result): Change into an alias of
7438         in_fun_result.
7439         (in_in_result): New.
7440         (mismatch_result): Change into an alias of in_in_result.
7441         (copy_if_result): Change into an alias of in_out_result.
7442         (swap_ranges_result): Change into an alias of in_in_result.
7443         (unary_transform_result): Change into an alias of in_out_result.
7444         (in_in_out_result): New.
7445         (binary_transform_result): Change into an alias of in_in_out_result.
7446         (replace_copy_result, replace_copy_if_result, remove_copy_if_result,
7447         remove_copy_result, unique_copy_result, reverse_copy_result,
7448         rotate_copy_result, partial_sort_copy_result): Change into an alias of
7449         in_out_result.
7450         (in_out_out_result): New.
7451         (partition_copy_result, merge_result): Change into an alias of
7452         in_out_out_result.
7453         (set_union_result, set_intersection_result): Change into an alias of
7454         in_in_out_result.
7455         (set_difference_result): Change into an alias of in_out_result.
7456         (set_symmetric_difference): Change into an alias of in_in_out_result.
7457         (min_max_result): New.
7458         (minmax_result, minmax_element_result): Change into an alias of
7459         min_max_result.
7460         (in_found_result): New.
7461         (next_permutation_result, prev_permutation_result): Change into an alias
7462         of in_found_result.
7463         (__next_permutation_fn::operator(), __prev_permutation_fn::operator()):
7464         Adjust following changes to next_permutation_result and
7465         prev_permutation_result.
7466         * include/bits/ranges_algobase.h (in_out_result): New.
7467         (copy_result, move_result, move_backward_result, copy_backward_result,
7468         copy_n_result): Change into an alias of in_out_result.
7469         * include/bits/ranges_uninitialized.h (uninitialized_copy_result,
7470         uninitialized_copy_n_result, uninitialized_move_result,
7471         uninitialized_move_n_result): Likewise.
7472         * testsuite/25_algorithms/next_permutation/constrained.cc: Adjust uses of
7473         structured bindings.
7474         * testsuite/25_algorithms/prev_permutation/constrained.cc: Likewise.
7475
7476         P1243R4 Rangify new algorithms
7477         * include/bits/ranges_algo.h (for_each_n_result, __for_each_n_fn,
7478         for_each_n, __sample_fn, sample, __clamp_fn, clamp): New.
7479         * testsuite/25_algorithms/clamp/constrained.cc: New test.
7480         * testsuite/25_algorithms/for_each/constrained.cc: Augment test.
7481         * testsuite/25_algorithms/sample/constrained.cc: New test.
7482
7483 2020-02-17  Jonathan Wakely  <jwakely@redhat.com>
7484
7485         P1964R2 Wording for boolean-testable
7486         * include/bits/ranges_algo.h (__find_fn, __find_first_of_fn)
7487         (__adjacent_find_fn): Cast result of predicate to bool.
7488         * include/std/concepts (__boolean): Remove.
7489         (__detail::__boolean_testable_impl, __detail::__boolean_testable): Add
7490         new helper concepts.
7491         (__detail::__weakly_eq_cmp_with, totally_ordered, totally_ordered_with)
7492         (predicate): Use __boolean_testable instead of boolean.
7493         * libsupc++/compare (__detail::__partially_ordered, _Synth3way):
7494         Likewise.
7495
7496         P1970R2 Consistency for size() functions: Add ranges::ssize
7497         * include/bits/range_access.h (_SSize, ssize): Define for C++20.
7498         * testsuite/std/ranges/access/ssize.cc: New test.
7499
7500         P1956R1 On the names of low-level bit manipulation functions
7501         * include/bits/hashtable_policy.h: Update comment.
7502         * include/std/bit (__ispow2, __ceil2, __floor2, __log2p1): Rename.
7503         (ispow2, ceil2, floor2, log2p1): Likewise.
7504         (__cpp_lib_int_pow2): Add feature test macro.
7505         * include/std/charconv (__to_chars_len_2): Adjust use of __log2p1.
7506         * include/std/memory (assume_aligned): Adjust use of ispow2.
7507         * include/std/version (__cpp_lib_int_pow2): Add.
7508         * libsupc++/new_opa.cc: Adjust use of __ispow2.
7509         * src/c++17/memory_resource.cc: Likewise, and for __ceil2 and __log2p1.
7510         * testsuite/17_intro/freestanding.cc: Adjust use of ispow2.
7511         * testsuite/26_numerics/bit/bit.pow.two/ceil2.cc: Rename to ...
7512         * testsuite/26_numerics/bit/bit.pow.two/bit_ceil.cc: ... here.
7513         * testsuite/26_numerics/bit/bit.pow.two/ceil2_neg.cc: Rename to ...
7514         * testsuite/26_numerics/bit/bit.pow.two/bit_ceil_neg.cc: ... here.
7515         * testsuite/26_numerics/bit/bit.pow.two/floor2.cc: Rename to ...
7516         * testsuite/26_numerics/bit/bit.pow.two/bit_floor.cc: ... here.
7517         * testsuite/26_numerics/bit/bit.pow.two/log2p1.cc: Rename to ...
7518         * testsuite/26_numerics/bit/bit.pow.two/bit_width.cc: ... here.
7519         * testsuite/26_numerics/bit/bit.pow.two/ispow2.cc: Rename to ...
7520         * testsuite/26_numerics/bit/bit.pow.two/has_single_bit.cc: ... here.
7521
7522         * include/std/charconv: Add comment.
7523
7524         PR libstdc++/92546 (partial)
7525         * include/bits/random.h (uniform_random_bit_generator): Move definition
7526         to <bits/uniform_int_dist.h>.
7527         * include/bits/ranges_algo.h: Include <bits/uniform_int_dist.h> instead
7528         of <bits/random.h>.
7529         * include/bits/ranges_algobase.h: Do not include <cmath>.
7530         * include/bits/uniform_int_dist.h (uniform_random_bit_generator):
7531         Move here.
7532         * include/std/ranges: Do not include <limits>.
7533         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error lineno.
7534
7535         PR libstdc++/92546 (partial)
7536         * include/Makefile.am: Add new header.
7537         * include/Makefile.in: Regenerate.
7538         * include/bits/int_limits.h: New header.
7539         * include/bits/parse_numbers.h (__select_int::_Select_int): Replace
7540         numeric_limits with __detail::__int_limits.
7541         * include/std/bit (__rotl, __rotr, __countl_zero, __countl_one)
7542         (__countr_zero, __countr_one, __popcount, __ceil2, __floor2, __log2p1):
7543         Likewise.
7544         * include/std/charconv (__to_chars_8, __from_chars_binary)
7545         (__from_chars_alpha_to_num, from_chars): Likewise.
7546         * include/std/memory_resource (polymorphic_allocator::allocate)
7547         (polymorphic_allocator::allocate_object): Likewise.
7548         * include/std/string_view (basic_string_view::_S_compare): Likewise.
7549         * include/std/utility (in_range): Likewise.
7550         * testsuite/20_util/integer_comparisons/in_range_neg.cc: Adjust for
7551         extra error about incomplete type __int_limits<bool>.
7552         * testsuite/26_numerics/bit/bit.count/countl_one.cc: Include <limits>.
7553         * testsuite/26_numerics/bit/bit.count/countl_zero.cc: Likewise.
7554         * testsuite/26_numerics/bit/bit.count/countr_one.cc: Likewise.
7555         * testsuite/26_numerics/bit/bit.count/countr_zero.cc: Likewise.
7556         * testsuite/26_numerics/bit/bit.count/popcount.cc: Likewise.
7557         * testsuite/26_numerics/bit/bit.pow.two/ceil2_neg.cc: Likewise.
7558         * testsuite/26_numerics/bit/bit.pow.two/ceil2.cc: Likewise.
7559         * testsuite/26_numerics/bit/bit.pow.two/floor2.cc: Likewise.
7560         * testsuite/26_numerics/bit/bit.pow.two/ispow2.cc: Likewise.
7561         * testsuite/26_numerics/bit/bit.pow.two/log2p1.cc: Likewise.
7562         * testsuite/26_numerics/bit/bit.rotate/rotl.cc: Likewise.
7563         * testsuite/26_numerics/bit/bit.rotate/rotr.cc: Likewise.
7564
7565         * python/libstdcxx/v6/printers.py (StdCmpCatPrinter.to_string): Update
7566         value for partial_ordering::unordered.
7567
7568         * include/bits/iterator_concepts.h (indirectly_copyable_storable): Add
7569         const-qualified expression variations.
7570         * include/std/concepts (copyable): Likewise.
7571
7572         * include/std/type_traits (__is_standard_integer): New helper trait.
7573         * include/std/utility (cmp_equal, cmp_not_equal, cmp_less, cmp_greater)
7574         (cmp_less_equal, cmp_greater_equal, in_range): Define for C++20.
7575         * include/std/version (__cpp_lib_integer_comparison_functions): Define.
7576         * testsuite/20_util/integer_comparisons/1.cc: New test.
7577         * testsuite/20_util/integer_comparisons/2.cc: New test.
7578         * testsuite/20_util/integer_comparisons/equal.cc: New test.
7579         * testsuite/20_util/integer_comparisons/equal_neg.cc: New test.
7580         * testsuite/20_util/integer_comparisons/greater_equal.cc: New test.
7581         * testsuite/20_util/integer_comparisons/greater_equal_neg.cc: New test.
7582         * testsuite/20_util/integer_comparisons/greater_neg.cc: New test.
7583         * testsuite/20_util/integer_comparisons/in_range.cc: New test.
7584         * testsuite/20_util/integer_comparisons/in_range_neg.cc: New test.
7585         * testsuite/20_util/integer_comparisons/less.cc: New test.
7586         * testsuite/20_util/integer_comparisons/less_equal.cc: New test.
7587         * testsuite/20_util/integer_comparisons/less_equal_neg.cc: New test.
7588         * testsuite/20_util/integer_comparisons/less_neg.cc: New test.
7589         * testsuite/20_util/integer_comparisons/not_equal.cc: New test.
7590         * testsuite/20_util/integer_comparisons/not_equal_neg.cc: New test.
7591
7592 2020-02-16  Patrick Palka  <ppalka@redhat.com>
7593
7594         * include/bits/ranges_algo.h (__lexicographical_compare_fn::operator()):
7595         Move code after an early exit constexpr if to under an else branch.
7596         * include/bits/ranges_algobase.h (__equal_fn::operator()): Likewise.
7597
7598 2020-02-15  Patrick Palka  <ppalka@redhat.com>
7599
7600         * include/bits/ranges_algo.h: Adjust whitespace and formatting.
7601         * include/bits/ranges_algobase.h: Likewise.
7602         * include/bits/ranges_uninitialized.h: Likewise.
7603
7604         * include/bits/ranges_algo.h: (adjacent_find, all_of, any_of,
7605         binary_search, copy_if, count, count_if, equal_range, find, find_end,
7606         find_first_of, find_if, find_if_not, for_each, generate, generate_n,
7607         includes, inplace_merge, is_heap, is_heap_until, is_partitioned,
7608         is_permutation, is_sorted, is_sorted_until, lexicographical_compare,
7609         lower_bound, make_heap, max, max_element, merge, min, min_element,
7610         minmax, minmax_element, mismatch, next_permutation, none_of,
7611         nth_element, partial_sort, partial_sort_copy, partition, partition_copy,
7612         partition_point, pop_heap, prev_permutation, push_heap, remove,
7613         remove_copy, remove_copy_if, remove_if, replace, replace_copy,
7614         replace_copy_if, replace_if, reverse, reverse_copy, rotate, rotate_copy,
7615         search, search_n, set_difference, set_intersection,
7616         set_symmetric_difference, set_union, shuffle, sort, sort_heap,
7617         stable_partition, stable_sort, swap_ranges, transform, unique,
7618         unique_copy, upper_bound): Convert into function objects.
7619         * include/bits/ranges_algobase.h: (equal, copy, move, copy_n, fill_n,
7620         fill, move_backward, copy_backward): Likewise.
7621         * include/bits/ranges_uninitialized.h (uninitialized_default_construct,
7622         uninitialized_default_construct_n, uninitialized_value_construct,
7623         uninitialized_value_construct_n, uninitialized_copy,
7624         uninitialized_copy_n, uninitialized_move, uninitialized_move_n,
7625         uninitialized_fill, uninitialized_fill_n, construct_at, destroy_at,
7626         destroy, destroy_n): Likewise.
7627
7628         * include/bits/ranges_algo.h (ranges::__find_end): Fold into ...
7629         (ranges::find_end): ... here.
7630         (ranges::__lexicographical_compare): Fold into ...
7631         (ranges::lexicographical_compare): ... here.
7632         * include/bits/ranges_algobase.h (ranges::__equal): Fold into ...
7633         (ranges::equal): ... here.
7634
7635 2020-02-15  Jonathan Wakely  <jwakely@redhat.com>
7636
7637         * include/bits/erase_if.h (__cpp_lib_erase_if): Define to 202002L.
7638         * include/std/deque: Likewise.
7639         * include/std/forward_list: Likewise.
7640         * include/std/list: Likewise.
7641         * include/std/string: Likewise.
7642         * include/std/vector: Likewise.
7643         * include/std/version: Likewise.
7644         * testsuite/23_containers/deque/erasure.cc: Test for new value.
7645         * testsuite/23_containers/forward_list/erasure.cc: Likewise.
7646         * testsuite/23_containers/list/erasure.cc: Likewise.
7647         * testsuite/23_containers/map/erasure.cc: Likewise.
7648         * testsuite/23_containers/set/erasure.cc: Likewise.
7649         * testsuite/23_containers/unordered_map/erasure.cc: Likewise.
7650         * testsuite/23_containers/unordered_set/erasure.cc: Likewise.
7651         * testsuite/23_containers/vector/erasure.cc: Likewise.
7652
7653 2020-02-15  Jonathan Wakely  <jwakely@redhat.com>
7654
7655         * include/bits/random.h (uniform_random_bit_generator): Require min()
7656         and max() to be constant expressions and min() to be less than max().
7657         * testsuite/26_numerics/random/concept.cc: Check additional cases.
7658         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error lineno.
7659
7660 2020-02-13  Patrick Palka  <ppalka@redhat.com>
7661
7662         * include/Makefile.am: Add <bits/ranges_uninitialized.h>.
7663         * include/Makefile.in: Regenerate.
7664         * include/bits/ranges_uninitialized.h: New header.
7665         * include/std/memory: Include it.
7666         * testsuite/20_util/specialized_algorithms/destroy/constrained.cc: New
7667         test.
7668         * .../uninitialized_copy/constrained.cc: New test.
7669         * .../uninitialized_default_construct/constrained.cc: New test.
7670         * .../uninitialized_fill/constrained.cc: New test.
7671         * .../uninitialized_move/constrained.cc: New test.
7672         * .../uninitialized_value_construct/constrained.cc: New test.
7673
7674         * include/Makefile.am: Add bits/ranges_algobase.h
7675         * include/Makefile.in: Regenerate.
7676         * bits/ranges_algo.h: Include <bits/ranges_algobase.h> and refactor
7677         existing #includes.
7678         (__detail::__is_normal_iterator, __detail::is_reverse_iterator,
7679         __detail::__is_move_iterator, copy_result, move_result,
7680         __equal, equal, copy_result, move_result, move_backward_result,
7681         copy_backward_result, __copy_or_move_backward, __copy_or_move, copy,
7682         move, copy_backward, move_backward, copy_n_result, copy_n, fill_n,
7683         fill): Split out into ...
7684         * bits/range_algobase.h: ... this new header.
7685
7686 2020-02-12  Patrick Palka  <ppalka@redhat.com>
7687
7688         LWG 3389 and LWG 3390
7689         * include/bits/stl_iterator.h (move_move_iterator): Use std::move when
7690         constructing the move_iterator with __i.
7691         (counted_iterator::counted_iterator): Use std::move when initializing
7692         M_current with __i.
7693         * testsuite/24_iterators/counted_iterator/lwg3389.cc: New test.
7694         * testsuite/24_iterators/move_iterator/lwg3390.cc: New test.
7695
7696 2020-02-12  Sandra Loosemore  <sandra@codesourcery.com>
7697
7698         PR libstdc++/79193
7699         PR libstdc++/88999
7700
7701         * configure: Regenerated.
7702
7703 2020-02-12  François Dumont  <fdumont@gcc.gnu.org>
7704
7705         * include/bits/hashtable.h
7706         (_Hashtable<>(_Hashtable&&, std::allocator_type&)): Add
7707         missing std namespace qualification to forward call.
7708
7709 2020-02-09  Jonathan Wakely  <jwakely@redhat.com>
7710
7711         * testsuite/20_util/function_objects/range.cmp/equal_to.cc: Fix
7712         comment.
7713         * testsuite/20_util/function_objects/range.cmp/less.ccL Likewise.
7714
7715         * include/std/ranges: Fix non-ASCII characters in comment.
7716
7717         * include/bits/range_cmp.h (__detail::__eq_builtin_ptr_cmp): Require
7718         equality comparison to be valid and return bool.
7719         (__detail::__less_builtin_ptr_cmp): Likewise for less-than comparison.
7720         * testsuite/20_util/function_objects/range.cmp/equal_to.cc: Check
7721         type with ambiguous conversion to fundamental types.
7722         * testsuite/20_util/function_objects/range.cmp/less.cc: Likewise.
7723
7724 2020-02-07  Jonathan Wakely  <jwakely@redhat.com>
7725
7726         * include/bits/iterator_concepts.h (iter_difference_t, iter_value_t):
7727         Use remove_cvref_t.
7728         (readable_traits): Rename to indirectly_readable_traits.
7729         (readable): Rename to indirectly_readable.
7730         (writable): Rename to indirectly_writable.
7731         (__detail::__iter_exchange_move): Do not use remove_reference_t.
7732         (indirectly_swappable): Adjust requires expression parameter types.
7733         expression.
7734         * include/bits/ranges_algo.h (ranges::transform, ranges::replace)
7735         (ranges::replace_if, ranges::generate_n, ranges::generate)
7736         (ranges::remove): Use new name for writable.
7737         * include/bits/stl_iterator.h (__detail::__common_iter_has_arrow):
7738         Use new name for readable.
7739         * include/ext/pointer.h (readable_traits<_Pointer_adapter<P>>): Use
7740         new name for readable_traits.
7741         * testsuite/24_iterators/associated_types/readable.traits.cc: Likewise.
7742         * testsuite/24_iterators/indirect_callable/projected.cc: Adjust for
7743         new definition of indirectly_readable.
7744
7745         * include/bits/stl_iterator.h (__detail::__common_iter_ptr): Change
7746         to take parameters of common_iterator, instead of the common_iterator
7747         type itself. Fix argument for __common_iter_has_arrow constraint.
7748         (iterator_traits<common_iterator<I, S>>::pointer): Adjust.
7749
7750 2020-02-07  Jonathan Wakely  <jwakely@redhat.com>
7751
7752         * include/std/ranges (iota_view): Add braces to prevent -Wempty-body
7753         warning.
7754         (basic_istream_view::_Iterator::operator++()): Add missing return.
7755
7756 2020-02-07  Patrick Palka  <ppalka@redhat.com>
7757
7758         * include/bits/ranges_algo.h: Remove extraneous &&.
7759
7760         * include/std/ranges (ranges::__detail::__stream_extractable,
7761         ranges::basic_istream_view, ranges::istream_view): Define.
7762         * testsuite/std/ranges/istream_view: New test.
7763
7764         Implement C++20 range adaptors
7765         * include/std/ranges: Include <bits/refwrap.h> and <tuple>.
7766         (subrange::_S_store_size): Mark as const instead of constexpr to
7767         avoid what seems to be a bug in GCC.
7768         (__detail::__box): Give it defaulted copy and move constructors.
7769         (ranges::views::_Single::operator()): Mark constexpr.
7770         (ranges::views::_Iota::operator()): Mark constexpr.
7771         (__detail::Empty): Define.
7772         (ranges::views::__closure::_RangeAdaptor,
7773         ranges::views::__closure::_RangeAdaptorClosure, ref_view, all_view,
7774         ranges::views::all, ranges::__detail::find_if,
7775         ranges::__detail::find_if_not, ranges::__detail::mismatch,
7776         ranges::detail::min, filter_view, ranges::views::filter, transform_view,
7777         ranges::views::transform, take_view, ranges::views::take,
7778         take_while_view, ranges::views::take_while, drop_view,
7779         ranges::views::drop, join_view, ranges::views::join,
7780         __detail::require_constant, __detail::tiny_range, split_view,
7781         ranges::views::split, ranges::views::_Counted, ranges::views::counted,
7782         common_view, ranges::views::common, reverse_view,
7783         ranges::views::reverse,
7784         ranges::views::__detail::__is_reversible_subrange,
7785         ranges::views::__detail::__is_reverse_view, reverse_view,
7786         ranges::views::reverse, __detail::__has_tuple_element, elements_view,
7787         ranges::views::elements, ranges::views::keys, ranges::views::values):
7788         Define.
7789         (views): Alias for ranges::views.
7790         (tuple_size<ranges::subrange<>>, tuple_element<0, ranges::subrange>,
7791         tuple_element<1, ranges::subrange>): New partial specializations.
7792         * testsuite/std/ranges/adaptors/all.cc: New test.
7793         * testsuite/std/ranges/adaptors/common.cc: Likewise.
7794         * testsuite/std/ranges/adaptors/counted.cc: Likewise.
7795         * testsuite/std/ranges/adaptors/drop.cc: Likewise.
7796         * testsuite/std/ranges/adaptors/drop_while.cc: Likewise.
7797         * testsuite/std/ranges/adaptors/elements.cc: Likewise.
7798         * testsuite/std/ranges/adaptors/filter.cc: Likewise.
7799         * testsuite/std/ranges/adaptors/join.cc: Likewise.
7800         * testsuite/std/ranges/adaptors/reverse.cc: Likewise.
7801         * testsuite/std/ranges/adaptors/split.cc: Likewise.
7802         * testsuite/std/ranges/adaptors/take.cc: Likewise.
7803         * testsuite/std/ranges/adaptors/take_while.cc: Likewise.
7804         * testsuite/std/ranges/adaptors/transform.cc: Likewise.
7805
7806 2020-02-07  Jonathan Wakely  <jwakely@redhat.com>
7807
7808         * libsupc++/compare (__cmp_cat::type): Define typedef for underlying
7809         type of enumerations and comparison category types.
7810         (__cmp_cat::_Ord, __cmp_cat::_Ncmp): Add underlying type.
7811         (__cmp_cat::_Ncmp::unordered): Change value to 2.
7812         (partial_ordering::_M_value, weak_ordering::_M_value)
7813         (strong_ordering::_M_value): Change type to __cmp_cat::type.
7814         (partial_ordering::_M_is_ordered): Remove data member.
7815         (partial_ordering): Use second bit of _M_value for unordered. Adjust
7816         comparison operators.
7817         (weak_ordering::operator partial_ordering): Simplify to remove
7818         branches.
7819         (operator<=>(unspecified, weak_ordering)): Likewise.
7820         (strong_ordering::operator partial_ordering): Likewise.
7821         (strong_ordering::operator weak_ordering): Likewise.
7822         (operator<=>(unspecified, strong_ordering)): Likewise.
7823         * testsuite/18_support/comparisons/categories/partialord.cc: New test.
7824         * testsuite/18_support/comparisons/categories/strongord.cc: New test.
7825         * testsuite/18_support/comparisons/categories/weakord.cc: New test.
7826
7827         * include/std/ranges (iota_view::_Iterator): Fix typo in name of
7828         __cpp_lib_three_way_comparison macro and use deduced return type for
7829         operator<=>.
7830         * testsuite/std/ranges/iota/iterator.cc: New test.
7831
7832 2020-02-07  Patrick Palka  <ppalka@redhat.com>
7833             Jonathan Wakely  <jwakely@redhat.com>
7834
7835         Implement C++20 constrained algorithms
7836         * include/Makefile.am: Add new header.
7837         * include/Makefile.in: Regenerate.
7838         * include/std/algorithm: Include <bits/ranges_algo.h>.
7839         * include/bits/ranges_algo.h: New file.
7840         * testsuite/25_algorithms/adjacent_find/constrained.cc: New test.
7841         * testsuite/25_algorithms/all_of/constrained.cc: New test.
7842         * testsuite/25_algorithms/any_of/constrained.cc: New test.
7843         * testsuite/25_algorithms/binary_search/constrained.cc: New test.
7844         * testsuite/25_algorithms/copy/constrained.cc: New test.
7845         * testsuite/25_algorithms/copy_backward/constrained.cc: New test.
7846         * testsuite/25_algorithms/copy_if/constrained.cc: New test.
7847         * testsuite/25_algorithms/copy_n/constrained.cc: New test.
7848         * testsuite/25_algorithms/count/constrained.cc: New test.
7849         * testsuite/25_algorithms/count_if/constrained.cc: New test.
7850         * testsuite/25_algorithms/equal/constrained.cc: New test.
7851         * testsuite/25_algorithms/equal_range/constrained.cc: New test.
7852         * testsuite/25_algorithms/fill/constrained.cc: New test.
7853         * testsuite/25_algorithms/fill_n/constrained.cc: New test.
7854         * testsuite/25_algorithms/find/constrained.cc: New test.
7855         * testsuite/25_algorithms/find_end/constrained.cc: New test.
7856         * testsuite/25_algorithms/find_first_of/constrained.cc: New test.
7857         * testsuite/25_algorithms/find_if/constrained.cc: New test.
7858         * testsuite/25_algorithms/find_if_not/constrained.cc: New test.
7859         * testsuite/25_algorithms/for_each/constrained.cc: New test.
7860         * testsuite/25_algorithms/generate/constrained.cc: New test.
7861         * testsuite/25_algorithms/generate_n/constrained.cc: New test.
7862         * testsuite/25_algorithms/heap/constrained.cc: New test.
7863         * testsuite/25_algorithms/includes/constrained.cc: New test.
7864         * testsuite/25_algorithms/inplace_merge/constrained.cc: New test.
7865         * testsuite/25_algorithms/is_partitioned/constrained.cc: New test.
7866         * testsuite/25_algorithms/is_permutation/constrained.cc: New test.
7867         * testsuite/25_algorithms/is_sorted/constrained.cc: New test.
7868         * testsuite/25_algorithms/is_sorted_until/constrained.cc: New test.
7869         * testsuite/25_algorithms/lexicographical_compare/constrained.cc: New
7870         test.
7871         * testsuite/25_algorithms/lower_bound/constrained.cc: New test.
7872         * testsuite/25_algorithms/max/constrained.cc: New test.
7873         * testsuite/25_algorithms/max_element/constrained.cc: New test.
7874         * testsuite/25_algorithms/merge/constrained.cc: New test.
7875         * testsuite/25_algorithms/min/constrained.cc: New test.
7876         * testsuite/25_algorithms/min_element/constrained.cc: New test.
7877         * testsuite/25_algorithms/minmax/constrained.cc: New test.
7878         * testsuite/25_algorithms/minmax_element/constrained.cc: New test.
7879         * testsuite/25_algorithms/mismatch/constrained.cc: New test.
7880         * testsuite/25_algorithms/move/constrained.cc: New test.
7881         * testsuite/25_algorithms/move_backward/constrained.cc: New test.
7882         * testsuite/25_algorithms/next_permutation/constrained.cc: New test.
7883         * testsuite/25_algorithms/none_of/constrained.cc: New test.
7884         * testsuite/25_algorithms/nth_element/constrained.cc: New test.
7885         * testsuite/25_algorithms/partial_sort/constrained.cc: New test.
7886         * testsuite/25_algorithms/partial_sort_copy/constrained.cc: New test.
7887         * testsuite/25_algorithms/partition/constrained.cc: New test.
7888         * testsuite/25_algorithms/partition_copy/constrained.cc: New test.
7889         * testsuite/25_algorithms/partition_point/constrained.cc: New test.
7890         * testsuite/25_algorithms/prev_permutation/constrained.cc: New test.
7891         * testsuite/25_algorithms/remove/constrained.cc: New test.
7892         * testsuite/25_algorithms/remove_copy/constrained.cc: New test.
7893         * testsuite/25_algorithms/remove_copy_if/constrained.cc: New test.
7894         * testsuite/25_algorithms/remove_if/constrained.cc: New test.
7895         * testsuite/25_algorithms/replace/constrained.cc: New test.
7896         * testsuite/25_algorithms/replace_copy/constrained.cc: New test.
7897         * testsuite/25_algorithms/replace_copy_if/constrained.cc: New test.
7898         * testsuite/25_algorithms/replace_if/constrained.cc: New test.
7899         * testsuite/25_algorithms/reverse/constrained.cc: New test.
7900         * testsuite/25_algorithms/reverse_copy/constrained.cc: New test.
7901         * testsuite/25_algorithms/rotate/constrained.cc: New test.
7902         * testsuite/25_algorithms/rotate_copy/constrained.cc: New test.
7903         * testsuite/25_algorithms/search/constrained.cc: New test.
7904         * testsuite/25_algorithms/search_n/constrained.cc: New test.
7905         * testsuite/25_algorithms/set_difference/constrained.cc: New test.
7906         * testsuite/25_algorithms/set_intersection/constrained.cc: New test.
7907         * testsuite/25_algorithms/set_symmetric_difference/constrained.cc: New
7908         test.
7909         * testsuite/25_algorithms/set_union/constrained.cc: New test.
7910         * testsuite/25_algorithms/shuffle/constrained.cc: New test.
7911         * testsuite/25_algorithms/sort/constrained.cc: New test.
7912         * testsuite/25_algorithms/stable_partition/constrained.cc: New test.
7913         * testsuite/25_algorithms/stable_sort/constrained.cc: New test.
7914         * testsuite/25_algorithms/swap_ranges/constrained.cc: New test.
7915         * testsuite/25_algorithms/transform/constrained.cc: New test.
7916         * testsuite/25_algorithms/unique/constrained.cc: New test.
7917         * testsuite/25_algorithms/unique_copy/constrained.cc: New test.
7918         * testsuite/25_algorithms/upper_bound/constrained.cc: New test.
7919
7920 2020-02-06  Jonathan Wakely  <jwakely@redhat.com>
7921
7922         * include/bits/stl_iterator.h (__detail::__common_iter_ptr): Fix PR
7923         number in comment. Fix indentation.
7924
7925         * include/bits/stl_algobase.h (__iter_swap, __iter_swap<true>): Remove
7926         redundant _GLIBCXX20_CONSTEXPR.
7927
7928         * include/std/ranges (viewable_range): Replace decay_t with
7929         remove_cvref_t (LWG 3375).
7930
7931 2020-02-05  Jonathan Wakely  <jwakely@redhat.com>
7932
7933         * include/bits/iterator_concepts.h (iter_reference_t)
7934         (iter_rvalue_reference_t, iter_common_reference_t, indirect_result_t):
7935         Remove workarounds for PR c++/67704.
7936         * testsuite/24_iterators/aliases.cc: New test.
7937
7938 2020-02-05  Patrick Palka  <ppalka@redhat.com>
7939
7940         * include/bits/stl_iterator.h (move_iterator::move_iterator): Move __i
7941         when initializing _M_current.
7942         (move_iterator::base): Split into two overloads differing in
7943         ref-qualifiers as in P1207R4 for C++20.
7944
7945 2020-02-04  Jonathan Wakely  <jwakely@redhat.com>
7946
7947         * include/std/functional (_GLIBCXX_NOT_FN_CALL_OP): Un-define after
7948         use.
7949
7950         PR libstdc++/93562
7951         * include/bits/unique_ptr.h (__uniq_ptr_impl::swap): Define.
7952         (unique_ptr::swap, unique_ptr<T[], D>::swap): Call it.
7953         * testsuite/20_util/unique_ptr/modifiers/93562.cc: New test.
7954
7955 2020-02-01  Andrew Burgess  <andrew.burgess@embecosm.com>
7956
7957         * configure: Regenerate.
7958
7959 2020-01-31  Patrick Palka  <ppalka@redhat.com>
7960
7961         * testsuite/24_iterators/range_operations/distance.cc: Do not assume
7962         test_range::end() returns the same type as test_range::begin().
7963         * testsuite/24_iterators/range_operations/next.cc: Likewise.
7964         * testsuite/24_iterators/range_operations/prev.cc: Likewise.
7965         * testsuite/util/testsuite_iterators.h (__gnu_test::test_range::end):
7966         Always return a sentinel<I>.
7967
7968 2020-01-29  Jonathan Wakely  <jwakely@redhat.com>
7969
7970         PR libstdc++/92895
7971         * include/std/stop_token (stop_token::stop_possible()): Call new
7972         _M_stop_possible() function.
7973         (stop_token::stop_requested()): Do not use stop_possible().
7974         (stop_token::binary_semaphore): New class, as temporary stand-in for
7975         std::binary_semaphore.
7976         (stop_token::_Stop_cb::_M_callback): Add noexcept to type.
7977         (stop_token::_Stop_cb::_M_destroyed, stop_token::_Stop_cb::_M_done):
7978         New data members for symchronization with stop_callback destruction.
7979         (stop_token::_Stop_cb::_Stop_cb): Make non-template.
7980         (stop_token::_Stop_cb::_M_linked, stop_token::_Stop_cb::_S_execute):
7981         Remove.
7982         (stop_token::_Stop_cb::_M_run): New member function.
7983         (stop_token::_Stop_state::_M_stopped, stop_token::_Stop_state::_M_mtx):
7984         Remove.
7985         (stop_token::_Stop_state::_M_owners): New data member to track
7986         reference count for ownership.
7987         (stop_token::_Stop_state::_M_value): New data member combining a
7988         spinlock, the stop requested flag, and the reference count for
7989         associated stop_source objects.
7990         (stop_token::_Stop_state::_M_requester): New data member for
7991         synchronization with stop_callback destruction.
7992         (stop_token::_Stop_state::_M_stop_possible()): New member function.
7993         (stop_token::_Stop_state::_M_stop_requested()): Inspect relevant bit
7994         of _M_value.
7995         (stop_token::_Stop_state::_M_add_owner)
7996         (stop_token::_Stop_state::_M_release_ownership)
7997         (stop_token::_Stop_state::_M_add_ssrc)
7998         (stop_token::_Stop_state::_M_sub_ssrc): New member functions for
7999         updating reference counts.
8000         (stop_token::_Stop_state::_M_lock, stop_token::_Stop_state::_M_unlock)
8001         (stop_token::_Stop_state::_M_lock, stop_token::_Stop_state::_M_unlock)
8002         (stop_token::_Stop_state::_M_try_lock)
8003         (stop_token::_Stop_state::_M_try_lock_and_stop)
8004         (stop_token::_Stop_state::_M_do_try_lock): New member functions for
8005         managing spinlock.
8006         (stop_token::_Stop_state::_M_request_stop): Use atomic operations to
8007         read and update state. Release lock while running callbacks. Use new
8008         data members to synchronize with callback destruction.
8009         (stop_token::_Stop_state::_M_remove_callback): Likewise.
8010         (stop_token::_Stop_state::_M_register_callback): Use atomic operations
8011         to read and update state.
8012         (stop_token::_Stop_state_ref): Handle type to manage _Stop_state,
8013         replacing shared_ptr.
8014         (stop_source::stop_source(const stop_source&)): Update reference count.
8015         (stop_source::operator=(const stop_source&)): Likewise.
8016         (stop_source::~stop_source()): Likewise.
8017         (stop_source::stop_source(stop_source&&)): Define as defaulted.
8018         (stop_source::operator=(stop_source&&)): Establish postcondition on
8019         parameter.
8020         (stop_callback): Enforce preconditions on template parameter. Replace
8021         base class with data member of new _Cb_impl type.
8022         (stop_callback::stop_callback(const stop_token&, Cb&&))
8023         (stop_callback::stop_callback(stop_token&&, Cb&&)): Fix TOCTTOU race.
8024         (stop_callback::_Cb_impl): New type wrapping _Callback member and
8025         defining the _S_execute member function.
8026         * testsuite/30_threads/stop_token/stop_callback/deadlock-mt.cc: New
8027         test.
8028         * testsuite/30_threads/stop_token/stop_callback/deadlock.cc: New test.
8029         * testsuite/30_threads/stop_token/stop_callback/destroy.cc: New test.
8030         * testsuite/30_threads/stop_token/stop_callback/destructible_neg.cc:
8031         New test.
8032         * testsuite/30_threads/stop_token/stop_callback/invocable_neg.cc: New
8033         test.
8034         * testsuite/30_threads/stop_token/stop_callback/invoke.cc: New test.
8035         * testsuite/30_threads/stop_token/stop_source/assign.cc: New test.
8036         * testsuite/30_threads/stop_token/stop_token/stop_possible.cc: New
8037         test.
8038
8039         * libsupc++/compare (__detail::__3way_builtin_ptr_cmp): Use
8040         three_way_comparable_with.
8041         (__detail::__3way_cmp_with): Remove workaround for fixed bug.
8042         (compare_three_way::operator()): Remove redundant constraint from
8043         requires-clause.
8044         (__detail::_Synth3way::operator()): Use three_way_comparable_with
8045         instead of workaround.
8046         * testsuite/18_support/comparisons/object/93479.cc: Prune extra
8047         output due to simplified constraints on compare_three_way::operator().
8048
8049         PR libstdc++/93479
8050         * libsupc++/compare (__3way_builtin_ptr_cmp): Require <=> to be valid.
8051         * testsuite/18_support/comparisons/object/93479.cc: New test.
8052
8053         * testsuite/std/ranges/access/end.cc: Do not assume test_range::end()
8054         returns the same type as test_range::begin(). Add comments.
8055         * testsuite/std/ranges/access/rbegin.cc: Likewise.
8056         * testsuite/std/ranges/access/rend.cc: Likewise.
8057         * testsuite/std/ranges/range.cc: Do not assume the sentinel for
8058         test_range is the same as its iterator type.
8059         * testsuite/util/testsuite_iterators.h (test_range::sentinel): Add
8060         operator- overloads to satisfy sized_sentinel_for when the iterator
8061         satisfies random_access_iterator.
8062
8063 2020-01-28  Jonathan Wakely  <jwakely@redhat.com>
8064
8065         PR libstdc++/93470
8066         * include/bits/refwrap.h (reference_wrapper::operator()): Restrict
8067         static assertion to object types.
8068
8069         PR libstdc++/93325
8070         * acinclude.m4 (GLIBCXX_ENABLE_LIBSTDCXX_TIME): Use AC_SEARCH_LIBS for
8071         clock_gettime instead of explicit glibc version check.
8072         * configure: Regenerate.
8073
8074 2020-01-28  Martin Liska  <mliska@suse.cz>
8075
8076         PR libstdc++/93478
8077         * include/std/atomic: Fix typo.
8078         * include/std/optional: Likewise.
8079
8080 2020-01-27  Andrew Burgess  <andrew.burgess@embecosm.com>
8081
8082         * configure: Regenerate.
8083
8084 2020-01-27  Jonathan Wakely  <jwakely@redhat.com>
8085
8086         PR libstdc++/93426
8087         * include/std/span (span): Fix deduction guide.
8088         * testsuite/23_containers/span/deduction.cc: New test.
8089
8090 2020-01-24  Jonathan Wakely  <jwakely@redhat.com>
8091
8092         * libsupc++/compare (__cmp_cat::_Eq): Remove enumeration type.
8093         (__cmp_cat::_Ord::equivalent): Add enumerator.
8094         (__cmp_cat::_Ord::_Less, __cmp_cat::_Ord::_Greater): Rename to less
8095         and greater.
8096         (partial_ordering, weak_ordering, strong_ordering): Remove
8097         constructors taking __cmp_cat::_Eq parameters. Use renamed
8098         enumerators.
8099
8100 2020-01-24  Maciej W. Rozycki  <macro@wdc.com>
8101
8102         * acinclude.m4: Handle `--with-toolexeclibdir='.
8103         * Makefile.in: Regenerate.
8104         * aclocal.m4: Regenerate.
8105         * configure: Regenerate.
8106         * doc/Makefile.in: Regenerate.
8107         * include/Makefile.in: Regenerate.
8108         * libsupc++/Makefile.in: Regenerate.
8109         * po/Makefile.in: Regenerate.
8110         * python/Makefile.in: Regenerate.
8111         * src/Makefile.in: Regenerate.
8112         * src/c++11/Makefile.in: Regenerate.
8113         * src/c++17/Makefile.in: Regenerate.
8114         * src/c++98/Makefile.in: Regenerate.
8115         * src/filesystem/Makefile.in: Regenerate.
8116         * testsuite/Makefile.in: Regenerate.
8117
8118 2020-01-23  Alexandre Oliva <oliva@adacore.com>
8119
8120         * crossconfig.m4 (GLIBCXX_CHECK_MATH_DECL): Reject macros.
8121         * configure: Rebuild.
8122
8123         * testsuite/27_io/fpos/mbstate_t/1.cc: Zero-init mbstate_t.
8124
8125 2020-01-23  Jonathan Wakely  <jwakely@redhat.com>
8126
8127         PR libstdc++/91947
8128         * include/Makefile.am (${host_builddir}/largefile-config.h): Simplify
8129         rule.
8130         * include/Makefile.in: Regenerate.
8131
8132 2020-01-20  Jonathan Wakely  <jwakely@redhat.com>
8133
8134         * doc/xml/faq.xml: Fix grammar.
8135         * doc/xml/manual/appendix_contributing.xml: Improve instructions.
8136         * doc/xml/manual/spine.xml: Update copyright years.
8137         * doc/html/*: Regenerate.
8138
8139 2020-01-19  Eric S. Raymond <esr@thyrsus.com>
8140
8141         * doc/xml/faq.xml: Update for SVN -> Git transition.
8142         * doc/xml/manual/appendix_contributing.xml: Likewise.
8143         * doc/xml/manual/status_cxx1998.xml: Likewise.
8144         * doc/xml/manual/status_cxx2011.xml: Likewise.
8145         * doc/xml/manual/status_cxx2014.xml: Likewise.
8146         * doc/xml/manual/status_cxx2017.xml: Likewise.
8147         * doc/xml/manual/status_cxx2020.xml: Likewise.
8148         * doc/xml/manual/status_cxxtr1.xml: Likewise.
8149         * doc/xml/manual/status_cxxtr24733.xml: Likewise.
8150
8151 2020-01-18  Iain Sandoe  <iain@sandoe.co.uk>
8152
8153         * include/Makefile.am: Add coroutine to the std set.
8154         * include/Makefile.in: Regenerated.
8155         * include/std/coroutine: New file.
8156
8157 2020-01-17  Jonathan Wakely  <jwakely@redhat.com>
8158
8159         PR libstdc++/92376
8160         * include/bits/c++config: Only do PSTL config when the header is
8161         present, to fix freestanding.
8162         * libsupc++/new_opa.cc [!_GLIBCXX_HOSTED]: Declare allocation
8163         functions if they were detected by configure.
8164
8165 2020-01-16  Kai-Uwe Eckhardt  <kuehro@gmx.de>
8166             Matthew Bauer  <mjbauer95@gmail.com>
8167             Jonathan Wakely  <jwakely@redhat.com>
8168
8169         PR bootstrap/64271 (partial)
8170         * config/os/bsd/netbsd/ctype_base.h (ctype_base::mask): Change type
8171         to unsigned short.
8172         (ctype_base::alpha, ctype_base::digit, ctype_base::xdigit)
8173         (ctype_base::print, ctype_base::graph, ctype_base::alnum): Sync
8174         definitions with NetBSD upstream.
8175         (ctype_base::blank): Use _CTYPE_BL.
8176         * config/os/bsd/netbsd/ctype_configure_char.cc (_C_ctype_): Remove
8177         Declaration.
8178         (ctype<char>::classic_table): Use _C_ctype_tab_ instead of _C_ctype_.
8179         (ctype<char>::do_toupper, ctype<char>::do_tolower): Cast char
8180         parameters to unsigned char.
8181         * config/os/bsd/netbsd/ctype_inline.h (ctype<char>::is): Likewise.
8182
8183 2020-01-16  François Dumont  <fdumont@gcc.gnu.org>
8184
8185         PR libstdc++/91263
8186         * include/bits/hashtable.h (_Hashtable<>): Make _Equality<> friend.
8187         * include/bits/hashtable_policy.h: Include <bits/stl_algo.h>.
8188         (_Equality_base): Remove.
8189         (_Equality<>::_M_equal): Review implementation. Use
8190         std::is_permutation.
8191         * testsuite/23_containers/unordered_multiset/operators/1.cc
8192         (Hash, Equal, test02, test03): New.
8193         * testsuite/23_containers/unordered_set/operators/1.cc
8194         (Hash, Equal, test02, test03): New.
8195
8196 2020-01-15  Jonathan Wakely  <jwakely@redhat.com>
8197
8198         PR libstdc++/93267
8199         * include/bits/iterator_concepts.h (__max_diff_type, __max_size_type):
8200         Move here from <bits/range_access.h> and define using __int128 when
8201         available.
8202         (__is_integer_like, __is_signed_integer_like): Move here from
8203         <bits/range_access.h>.
8204         (weakly_incrementable): Use __is_signed_integer_like.
8205         * include/bits/range_access.h (__max_diff_type, __max_size_type)
8206         (__is_integer_like, __is_signed_integer_like): Move to
8207         <bits/iterator_concepts.h>.
8208         (__make_unsigned_like_t): Move here from <ranges>.
8209         * include/std/ranges (__make_unsigned_like_t): Move to
8210         <bits/range_access.h>.
8211         (iota_view): Replace using-directive with using-declarations.
8212         * testsuite/std/ranges/iota/93267.cc: New test.
8213         * testsuite/std/ranges/iota_view.cc: Move to new 'iota' sub-directory.
8214
8215 2020-01-13  Jonathan Wakely  <jwakely@redhat.com>
8216
8217         PR libstdc++/93244
8218         * include/bits/fs_path.h (path::generic_string<C,A>)
8219         [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Convert root-dir to forward-slash.
8220         * testsuite/27_io/filesystem/path/generic/generic_string.cc: Check
8221         root-dir is converted to forward slash in generic pathname.
8222         * testsuite/27_io/filesystem/path/generic/utf.cc: New test.
8223         * testsuite/27_io/filesystem/path/generic/wchar_t.cc: New test.
8224
8225         PR libstdc++/58605
8226         * include/bits/atomic_base.h (__cpp_lib_atomic_value_initialization):
8227         Define.
8228         (__atomic_flag_base, __atomic_base, __atomic_base<_PTp*>)
8229         (__atomic_float): Add default member initializer for C++20.
8230         * include/std/atomic (atomic): Likewise.
8231         (atomic::atomic()): Remove noexcept-specifier on default constructor.
8232         * include/std/version (__cpp_lib_atomic_value_initialization): Define.
8233         * testsuite/29_atomics/atomic/cons/assign_neg.cc: Adjust dg-error line
8234         number.
8235         * testsuite/29_atomics/atomic/cons/copy_neg.cc: Likewise.
8236         * testsuite/29_atomics/atomic/cons/value_init.cc: New test.
8237         * testsuite/29_atomics/atomic_flag/cons/value_init.cc: New test.
8238         * testsuite/29_atomics/atomic_flag/requirements/trivial.cc: Adjust
8239         expected result for is_trivially_default_constructible.
8240         * testsuite/29_atomics/atomic_float/requirements.cc: Likewise.
8241         * testsuite/29_atomics/atomic_float/value_init.cc: New test.
8242         * testsuite/29_atomics/atomic_integral/cons/assign_neg.cc: Likewise.
8243         * testsuite/29_atomics/atomic_integral/cons/copy_neg.cc: Likewise.
8244         * testsuite/29_atomics/atomic_integral/cons/value_init.cc
8245         * testsuite/29_atomics/atomic_integral/requirements/trivial.cc: Adjust
8246         expected results for is_trivially_default_constructible.
8247         * testsuite/util/testsuite_common_types.h (has_trivial_dtor): Add
8248         new test generator.
8249
8250 2020-01-10  Jonathan Wakely  <jwakely@redhat.com>
8251
8252         * testsuite/util/testsuite_iterators.h: Improve comment.
8253
8254         * testsuite/25_algorithms/equal/deque_iterators/1.cc: Don't use C++11
8255         initialization syntax.
8256
8257         PR libstdc++/92285
8258         * include/bits/streambuf_iterator.h (istreambuf_iterator): Make type
8259         of base class independent of __cplusplus value.
8260         [__cplusplus < 201103L] (istreambuf_iterator::reference): Override the
8261         type defined in the base class
8262         * testsuite/24_iterators/istreambuf_iterator/92285.cc: New test.
8263         * testsuite/24_iterators/istreambuf_iterator/requirements/
8264         base_classes.cc: Adjust expected base class for C++98.
8265
8266 2020-01-09  Olivier Hainque  <hainque@adacore.com>
8267
8268         * doc/xml/manual/appendix_contributing.xml: Document _C2
8269         as a reserved identifier, by VxWorks.
8270         * include/bits/stl_map.h: Rename _C2 template typenames as _Cmp2.
8271         * include/bits/stl_multimap.h: Likewise.
8272
8273 2020-01-09  Jonathan Wakely  <jwakely@redhat.com>
8274
8275         * include/ext/extptr_allocator.h (_ExtPtr_allocator::operator==)
8276         (_ExtPtr_allocator::operator!=): Add missing const qualifiers.
8277         * include/ext/pointer.h (readable_traits<_Pointer_adapter<S>>): Add
8278         partial specialization to disambiguate the two constrained
8279         specializations.
8280
8281         * include/experimental/type_traits (experimental::is_pod_v): Disable
8282         -Wdeprecated-declarations warnings around reference to std::is_pod.
8283         * include/std/type_traits (is_pod_v): Likewise.
8284         * testsuite/18_support/max_align_t/requirements/2.cc: Also check
8285         is_standard_layout and is_trivial. Do not check is_pod for C++20.
8286         * testsuite/20_util/is_pod/requirements/explicit_instantiation.cc:
8287         Add -Wno-deprecated for C++20.
8288         * testsuite/20_util/is_pod/requirements/typedefs.cc: Likewise.
8289         * testsuite/20_util/is_pod/value.cc: Likewise.
8290         * testsuite/experimental/type_traits/value.cc: Likewise.
8291
8292 2020-01-09  JeanHeyd "ThePhD" Meneide  <phdofthehouse@gmail.com>
8293
8294         * include/bits/c++config (_GLIBCXX20_DEPRECATED): Add new macro.
8295         * include/std/type_traits (is_pod, is_pod_v): Deprecate for C++20.
8296         * testuite/20_util/is_pod/deprecated-2a.cc: New test.
8297
8298 2020-01-09  Jonathan Wakely  <jwakely@redhat.com>
8299
8300         PR libstdc++/93205
8301         * include/bits/random.h (operator>>): Check stream operation succeeds.
8302         * include/bits/random.tcc (operator<<): Remove redundant __ostream_type
8303         typedefs.
8304         (operator>>): Remove redundant __istream_type typedefs. Check stream
8305         operations succeed.
8306         (__extract_params): New function to fill a vector from a stream.
8307         * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error line.
8308
8309         PR libstdc++/93208
8310         * config/abi/pre/gnu.ver: Add new exports.
8311         * include/std/memory_resource (memory_resource::~memory_resource()):
8312         Do not define inline.
8313         (monotonic_buffer_resource::~monotonic_buffer_resource()): Likewise.
8314         * src/c++17/memory_resource.cc (memory_resource::~memory_resource()):
8315         Define.
8316         (monotonic_buffer_resource::~monotonic_buffer_resource()): Define.
8317         * testsuite/20_util/monotonic_buffer_resource/93208.cc: New test.
8318
8319 2020-01-09  François Dumont  <fdumont@gcc.gnu.org>
8320
8321         PR libstdc++/92124
8322         * include/bits/hashtable.h (_Hashtable<>::__alloc_node_gen_t): New
8323         template alias.
8324         (_Hashtable<>::__fwd_value_for): New.
8325         (_Hashtable<>::_M_assign_elements<>): Remove _NodeGenerator template
8326         parameter.
8327         (_Hashtable<>::_M_assign<>): Add _Ht template parameter.
8328         (_Hashtable<>::operator=(const _Hashtable<>&)): Adapt.
8329         (_Hashtable<>::_M_move_assign): Adapt. Replace std::move_if_noexcept
8330         with std::move.
8331         (_Hashtable<>::_Hashtable(const _Hashtable&)): Adapt.
8332         (_Hashtable<>::_Hashtable(const _Hashtable&, const allocator_type&)):
8333         Adapt.
8334         (_Hashtable<>::_Hashtable(_Hashtable&&, const allocator_type&)):
8335         Adapt.
8336         * testsuite/23_containers/unordered_set/92124.cc: New.
8337
8338 2020-01-08  Jonathan Wakely  <jwakely@redhat.com>
8339
8340         PR libstdc++/93201
8341         * src/c++17/fs_ops.cc (do_remove_all): New function implementing more
8342         detailed error reporting for remove_all. Check result of recursive
8343         call before incrementing iterator.
8344         (remove_all(const path&), remove_all(const path&, error_code&)): Use
8345         do_remove_all.
8346         * src/filesystem/ops.cc (remove_all(const path&, error_code&)): Check
8347         result of recursive call before incrementing iterator.
8348         * testsuite/27_io/filesystem/operations/remove_all.cc: Check errors
8349         are reported correctly.
8350         * testsuite/experimental/filesystem/operations/remove_all.cc: Likewise.
8351
8352 2020-01-07  Thomas Rodgers  <trodgers@redhat.com>
8353
8354         * include/std/condition_variable
8355         (condition_variable_any::wait_on): Rename to match current draft
8356         standard.
8357         (condition_variable_any::wait_on_until): Likewise.
8358         (condition_variable_any::wait_on_for): Likewise.
8359         * testsuite/30_threads/condition_variable_any/stop_token/wait_on.cc:
8360         Adjust tests to account for renamed methods.
8361
8362 2020-01-07  François Dumont  <fdumont@gcc.gnu.org>
8363
8364         PR libstdc++/92124
8365         * include/bits/stl_tree.h
8366         (_Rb_tree<>::_M_move_assign(_Rb_tree&, false_type)): Replace
8367         std::move_if_noexcept by std::move.
8368         * testsuite/23_containers/map/92124.cc: New.
8369         * testsuite/23_containers/set/92124.cc: New.
8370
8371 2020-01-06  Jonathan Wakely  <jwakely@redhat.com>
8372
8373         * include/std/stop_token (stop_token): Remove operator!= (LWG 3254).
8374         (stop_source): Likewise (LWG 3362).
8375         * testsuite/30_threads/stop_token/stop_source.cc: Test equality
8376         comparisons.
8377
8378         * include/bits/stl_algobase.h (__is_byte_iter, __min_cmp)
8379         (lexicographical_compare_three_way): Do not depend on
8380         __cpp_lib_concepts.
8381         * include/std/version (__cpp_lib_three_way_comparison): Only define
8382         when __cpp_lib_concepts is defined.
8383         * libsupc++/compare (__cpp_lib_three_way_comparison): Likewise.
8384
8385 2020-01-03  Jonathan Wakely  <jwakely@redhat.com>
8386
8387         * include/bits/stl_algobase.h (lexicographical_compare_three_way):
8388         Only define four-argument overload when __cpp_lib_concepts is defined.
8389
8390 2020-01-01  John David Anglin  <danglin@gcc.gnu.org>
8391
8392         * config/abi/post/hppa-linux-gnu/baseline_symbols.txt: Update.
8393
8394 2020-01-01  Jakub Jelinek  <jakub@redhat.com>
8395
8396         Update copyright years.
8397 \f
8398 Copyright (C) 2020 Free Software Foundation, Inc.
8399
8400 Copying and distribution of this file, with or without modification,
8401 are permitted in any medium without royalty provided the copyright
8402 notice and this notice are preserved.